This patch adds the DGNC driver. This is a TTY Serial Port Driver for the Digi International Neo and Classic PCI based product line by Digi International <http://www.digi.com>. Signed-off-by: Lidza Louina <lidza.louina@xxxxxxxxx> --- drivers/staging/dgnc/Kconfig | 6 + drivers/staging/dgnc/Makefile | 7 + drivers/staging/dgnc/Makefile.inc | 133 ++ drivers/staging/dgnc/dgnc_cls.c | 1412 ++++++++++++++ drivers/staging/dgnc/dgnc_cls.h | 90 + drivers/staging/dgnc/dgnc_driver.c | 1028 ++++++++++ drivers/staging/dgnc/dgnc_driver.h | 566 ++++++ drivers/staging/dgnc/dgnc_kcompat.h | 91 + drivers/staging/dgnc/dgnc_mgmt.c | 313 +++ drivers/staging/dgnc/dgnc_mgmt.h | 37 + drivers/staging/dgnc/dgnc_neo.c | 1977 +++++++++++++++++++ drivers/staging/dgnc/dgnc_neo.h | 157 ++ drivers/staging/dgnc/dgnc_pci.h | 77 + drivers/staging/dgnc/dgnc_proc.c | 1551 +++++++++++++++ drivers/staging/dgnc/dgnc_proc.h | 147 ++ drivers/staging/dgnc/dgnc_sysfs.c | 761 ++++++++ drivers/staging/dgnc/dgnc_sysfs.h | 49 + drivers/staging/dgnc/dgnc_trace.c | 187 ++ drivers/staging/dgnc/dgnc_trace.h | 45 + drivers/staging/dgnc/dgnc_tty.c | 3648 +++++++++++++++++++++++++++++++++++ drivers/staging/dgnc/dgnc_tty.h | 42 + drivers/staging/dgnc/dgnc_types.h | 36 + drivers/staging/dgnc/digi.h | 419 ++++ drivers/staging/dgnc/dpacompat.h | 115 ++ 24 files changed, 12894 insertions(+) create mode 100644 drivers/staging/dgnc/Kconfig create mode 100644 drivers/staging/dgnc/Makefile create mode 100644 drivers/staging/dgnc/Makefile.inc create mode 100644 drivers/staging/dgnc/dgnc_cls.c create mode 100644 drivers/staging/dgnc/dgnc_cls.h create mode 100644 drivers/staging/dgnc/dgnc_driver.c create mode 100644 drivers/staging/dgnc/dgnc_driver.h create mode 100644 drivers/staging/dgnc/dgnc_kcompat.h create mode 100644 drivers/staging/dgnc/dgnc_mgmt.c create mode 100644 drivers/staging/dgnc/dgnc_mgmt.h create mode 100644 drivers/staging/dgnc/dgnc_neo.c create mode 100644 drivers/staging/dgnc/dgnc_neo.h create mode 100644 drivers/staging/dgnc/dgnc_pci.h create mode 100644 drivers/staging/dgnc/dgnc_proc.c create mode 100644 drivers/staging/dgnc/dgnc_proc.h create mode 100644 drivers/staging/dgnc/dgnc_sysfs.c create mode 100644 drivers/staging/dgnc/dgnc_sysfs.h create mode 100644 drivers/staging/dgnc/dgnc_trace.c create mode 100644 drivers/staging/dgnc/dgnc_trace.h create mode 100644 drivers/staging/dgnc/dgnc_tty.c create mode 100644 drivers/staging/dgnc/dgnc_tty.h create mode 100644 drivers/staging/dgnc/dgnc_types.h create mode 100644 drivers/staging/dgnc/digi.h create mode 100644 drivers/staging/dgnc/dpacompat.h diff --git a/drivers/staging/dgnc/Kconfig b/drivers/staging/dgnc/Kconfig new file mode 100644 index 0000000..23daaa5 --- /dev/null +++ b/drivers/staging/dgnc/Kconfig @@ -0,0 +1,6 @@ +config DGNC + tristate "Digi Neo and Classic PCI Products" + default n + depends on TTY + ---help--- + Driver for the Digi International Neo and Classic PCI based product line. diff --git a/drivers/staging/dgnc/Makefile b/drivers/staging/dgnc/Makefile new file mode 100644 index 0000000..c4c96dc --- /dev/null +++ b/drivers/staging/dgnc/Makefile @@ -0,0 +1,7 @@ +EXTRA_CFLAGS += -DDG_NAME=\"dgnc-1.3-16\" -DDG_PART=\"40002369_F\" + +obj-$(CONFIG_DGNC) += dgnc.o + +dgnc-objs := dgnc_cls.o dgnc_driver.o\ + dgnc_mgmt.o dgnc_neo.o\ + dgnc_proc.o dgnc_trace.o dgnc_tty.o dgnc_sysfs.o diff --git a/drivers/staging/dgnc/Makefile.inc b/drivers/staging/dgnc/Makefile.inc new file mode 100644 index 0000000..6ca38c7 --- /dev/null +++ b/drivers/staging/dgnc/Makefile.inc @@ -0,0 +1,133 @@ +# +# From Makefile.inc +# + +# +# Common definitions go here. +# + +# +# TRUE_VERSION is the version string used in the driver build, +# it is intended to be in the form: +# +# 2.0-0 +# +# A string noting a particular special modification could be +# used as well. This string will be reported when the driver +# is loaded, and will be exposed by its /proc/dgnc/info +# interface. +# +TRUE_VERSION="1.3-16" + +# +# DGNC_PART_NUM is the part number string for the driver package. +# It should be in the form: +# +# 40002369_A +# +DGNC_PART_NUM=40002369_F + +# +# DGNC_REL_NOTE is the part number string for the driver release +# notes. It should be in the form: +# +# 93000517_A +# +DGNC_REL_NOTE=93000517_F + +# +# DGNC_PKG_VER is the "version" number string included in the +# various documentation and packaging files. It should be +# in the form: +# +# 1.0 +# +DGNC_PKG_VER=1.3 + +# +# DGNC_PKG_REV is the "revision" of this version. Together, +# a linux module revision is built with: +# +# ${DGNC_PKG_VER}-${DGNC_PKG_REV} +# +DGNC_PKG_REV=16 + +# +# DRP_PKG_DATE is the "date" string included in (for now) the +# release notes. It should be in the form: +# +# 11/04/2003 +# +DGNC_PKG_DATE=10/17/2008 + +INIT_DIR= $(shell \ + if [ -d /etc/rc.d/init.d ]; \ + then echo "$(RPM_BUILD_ROOT)/etc/rc.d/init.d"; \ + else echo "$(RPM_BUILD_ROOT)/etc/init.d"; fi) + +# +# Miscelaneous path macro's +# + +PACKAGE= dgnc +DEVDIR= /dev/dg/$(PACKAGE) +SRCDIR= /usr/src/dg/$(PACKAGE) +BINDIR= /usr/bin +DRVLIBDIR= /etc/$(PACKAGE) +MANDIR= /usr/man +USRLIBDIR= /usr/lib +DGNCDIR= /etc/dgnc + + +INIT_DIR= $(shell \ + if [ -d /etc/rc.d/init.d ]; \ + then echo "/etc/rc.d/init.d"; \ + else echo "/etc/init.d"; fi) + + +# +# From Makefile +# +ifndef MYPWD +MYPWD = $(shell pwd) +endif + +ifeq ($(KERNDIR),) + KERNVERS := $(shell uname -r) + KERNDIR :=/lib/modules/${KERNVERS}/ +endif + +# Grab version and other important stuff + +RPMNAME := $(PACKAGE)-$(TRUE_VERSION) + +PARTNUM := $(DGNC_PART_NUM) + +RELNOTES := $(DGNC_REL_NOTE) + +MODDIR = $(shell echo $(BUILDROOT)/lib/modules/3.4.36-lcrs/misc) +LSMOD = /sbin/lsmod +RMMOD = /sbin/rmmod +INSMOD = /sbin/insmod +NEW_TTY_LOCKING = No +NEW_TTY_BUFFERING = No +REGISTER_TTYS_WITH_SYSFS = No + +# Send in some extra things... +EXTRA_CFLAGS += -I${MYPWD} -I${MYPWD}/include -I${MYPWD}/../../commoninc\ + -I${MYPWD}/../../dpa -DLINUX -DDG_NAME=\"$(RPMNAME)\"\ + -DDG_PART=\"$(PARTNUM)\" -DDGNC_TRACER + +ifeq ($(NEW_TTY_LOCKING),Yes) + EXTRA_CFLAGS += -DNEW_TTY_LOCKING +endif + +ifeq ($(NEW_TTY_BUFFERING),Yes) + EXTRA_CFLAGS += -DNEW_TTY_BUFFERING +endif + +ifeq ($(REGISTER_TTYS_WITH_SYSFS),Yes) + EXTRA_CFLAGS += -DREGISTER_TTYS_WITH_SYSFS +endif + +# Conform to correct kbuild conventions... diff --git a/drivers/staging/dgnc/dgnc_cls.c b/drivers/staging/dgnc/dgnc_cls.c new file mode 100644 index 0000000..83ded18 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_cls.c @@ -0,0 +1,1412 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + * + * $Id: dgnc_cls.c,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/delay.h> /* For udelay */ +#include <asm/io.h> /* For read[bwl]/write[bwl] */ +#include <linux/serial.h> /* For struct async_serial */ +#include <linux/serial_reg.h> /* For the various UART offsets */ +#include <linux/pci.h> + +#include "dgnc_driver.h" /* Driver main header file */ +#include "dgnc_cls.h" +#include "dgnc_tty.h" +#include "dgnc_trace.h" + +static inline void cls_parse_isr(struct board_t *brd, uint port); +static inline void cls_clear_break(struct channel_t *ch, int force); +static inline void cls_set_cts_flow_control(struct channel_t *ch); +static inline void cls_set_rts_flow_control(struct channel_t *ch); +static inline void cls_set_ixon_flow_control(struct channel_t *ch); +static inline void cls_set_ixoff_flow_control(struct channel_t *ch); +static inline void cls_set_no_output_flow_control(struct channel_t *ch); +static inline void cls_set_no_input_flow_control(struct channel_t *ch); +static void cls_parse_modem(struct channel_t *ch, uchar signals); +static void cls_tasklet(unsigned long data); +static void cls_vpd(struct board_t *brd); +static void cls_uart_init(struct channel_t *ch); +static void cls_uart_off(struct channel_t *ch); +static int cls_drain(struct tty_struct *tty, uint seconds); +static void cls_param(struct tty_struct *tty); +static void cls_assert_modem_signals(struct channel_t *ch); +static void cls_flush_uart_write(struct channel_t *ch); +static void cls_flush_uart_read(struct channel_t *ch); +static void cls_disable_receiver(struct channel_t *ch); +static void cls_enable_receiver(struct channel_t *ch); +static void cls_send_break(struct channel_t *ch, int msecs); +static void cls_send_start_character(struct channel_t *ch); +static void cls_send_stop_character(struct channel_t *ch); +static void cls_copy_data_from_uart_to_queue(struct channel_t *ch); +static void cls_copy_data_from_queue_to_uart(struct channel_t *ch); +static uint cls_get_uart_bytes_left(struct channel_t *ch); +static void cls_send_immediate_char(struct channel_t *ch, unsigned char); +static irqreturn_t cls_intr(int irq, void *voidbrd); + +struct board_ops dgnc_cls_ops = { + .tasklet = cls_tasklet, + .intr = cls_intr, + .uart_init = cls_uart_init, + .uart_off = cls_uart_off, + .drain = cls_drain, + .param = cls_param, + .vpd = cls_vpd, + .assert_modem_signals = cls_assert_modem_signals, + .flush_uart_write = cls_flush_uart_write, + .flush_uart_read = cls_flush_uart_read, + .disable_receiver = cls_disable_receiver, + .enable_receiver = cls_enable_receiver, + .send_break = cls_send_break, + .send_start_character = cls_send_start_character, + .send_stop_character = cls_send_stop_character, + .copy_data_from_queue_to_uart = cls_copy_data_from_queue_to_uart, + .get_uart_bytes_left = cls_get_uart_bytes_left, + .send_immediate_char = cls_send_immediate_char +}; + + +static inline void cls_set_cts_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Setting CTSFLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn on CTS flow control, turn off IXON flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB | UART_EXAR654_EFR_CTSDSR); + isr_fcr &= ~(UART_EXAR654_EFR_IXON); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Enable interrupts for CTS flow, turn off interrupts for received XOFF chars */ + ier |= (UART_EXAR654_IER_CTSDSR); + ier &= ~(UART_EXAR654_IER_XOFF); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_56 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + + ch->ch_t_tlevel = 16; + +} + + +static inline void cls_set_ixon_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Setting IXON FLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn on IXON flow control, turn off CTS flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB | UART_EXAR654_EFR_IXON); + isr_fcr &= ~(UART_EXAR654_EFR_CTSDSR); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Now set our current start/stop chars while in enhanced mode */ + writeb(ch->ch_startc, &ch->ch_cls_uart->mcr); + writeb(0, &ch->ch_cls_uart->lsr); + writeb(ch->ch_stopc, &ch->ch_cls_uart->msr); + writeb(0, &ch->ch_cls_uart->spr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Disable interrupts for CTS flow, turn on interrupts for received XOFF chars */ + ier &= ~(UART_EXAR654_IER_CTSDSR); + ier |= (UART_EXAR654_IER_XOFF); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_16 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + +} + + +static inline void cls_set_no_output_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Unsetting Output FLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn off IXON flow control, turn off CTS flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB); + isr_fcr &= ~(UART_EXAR654_EFR_CTSDSR | UART_EXAR654_EFR_IXON); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Disable interrupts for CTS flow, turn off interrupts for received XOFF chars */ + ier &= ~(UART_EXAR654_IER_CTSDSR); + ier &= ~(UART_EXAR654_IER_XOFF); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_16 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + + ch->ch_r_watermark = 0; + ch->ch_t_tlevel = 16; + ch->ch_r_tlevel = 16; + +} + + +static inline void cls_set_rts_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Setting RTSFLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn on RTS flow control, turn off IXOFF flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB | UART_EXAR654_EFR_RTSDTR); + isr_fcr &= ~(UART_EXAR654_EFR_IXOFF); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Enable interrupts for RTS flow */ + ier |= (UART_EXAR654_IER_RTSDTR); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_56 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + + + ch->ch_r_watermark = 4; + ch->ch_r_tlevel = 8; + +} + + +static inline void cls_set_ixoff_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Setting IXOFF FLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn on IXOFF flow control, turn off RTS flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB | UART_EXAR654_EFR_IXOFF); + isr_fcr &= ~(UART_EXAR654_EFR_RTSDTR); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Now set our current start/stop chars while in enhanced mode */ + writeb(ch->ch_startc, &ch->ch_cls_uart->mcr); + writeb(0, &ch->ch_cls_uart->lsr); + writeb(ch->ch_stopc, &ch->ch_cls_uart->msr); + writeb(0, &ch->ch_cls_uart->spr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Disable interrupts for RTS flow */ + ier &= ~(UART_EXAR654_IER_RTSDTR); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_16 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + +} + + +static inline void cls_set_no_input_flow_control(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar ier = readb(&ch->ch_cls_uart->ier); + uchar isr_fcr = 0; + + DPR_PARAM(("Unsetting Input FLOW\n")); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn off IXOFF flow control, turn off RTS flow control */ + isr_fcr |= (UART_EXAR654_EFR_ECB); + isr_fcr &= ~(UART_EXAR654_EFR_RTSDTR | UART_EXAR654_EFR_IXOFF); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Disable interrupts for RTS flow */ + ier &= ~(UART_EXAR654_IER_RTSDTR); + writeb(ier, &ch->ch_cls_uart->ier); + + /* Set the usual FIFO values */ + writeb((UART_FCR_ENABLE_FIFO), &ch->ch_cls_uart->isr_fcr); + + writeb((UART_FCR_ENABLE_FIFO | UART_16654_FCR_RXTRIGGER_16 | + UART_16654_FCR_TXTRIGGER_16 | UART_FCR_CLEAR_RCVR), + &ch->ch_cls_uart->isr_fcr); + + ch->ch_t_tlevel = 16; + ch->ch_r_tlevel = 16; + +} + + +/* + * cls_clear_break. + * Determines whether its time to shut off break condition. + * + * No locks are assumed to be held when calling this function. + * channel lock is held and released in this function. + */ +static inline void cls_clear_break(struct channel_t *ch, int force) +{ + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Bail if we aren't currently sending a break. */ + if (!ch->ch_stop_sending_break) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* Turn break off, and unset some variables */ + if (ch->ch_flags & CH_BREAK_SENDING) { + if ((jiffies >= ch->ch_stop_sending_break) || force) { + uchar temp = readb(&ch->ch_cls_uart->lcr); + writeb((temp & ~UART_LCR_SBC), &ch->ch_cls_uart->lcr); + ch->ch_flags &= ~(CH_BREAK_SENDING); + ch->ch_stop_sending_break = 0; + DPR_IOCTL(("Finishing UART_LCR_SBC! finished: %lx\n", jiffies)); + } + } + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +/* Parse the ISR register for the specific port */ +static inline void cls_parse_isr(struct board_t *brd, uint port) +{ + struct channel_t *ch; + uchar isr = 0; + ulong lock_flags; + + /* + * No need to verify board pointer, it was already + * verified in the interrupt routine. + */ + + if (port > brd->nasync) + return; + + ch = brd->channels[port]; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + /* Here we try to figure out what caused the interrupt to happen */ + while (1) { + + isr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Bail if no pending interrupt on port */ + if (isr & UART_IIR_NO_INT) { + break; + } + + DPR_INTR(("%s:%d port: %x isr: %x\n", __FILE__, __LINE__, port, isr)); + + /* Receive Interrupt pending */ + if (isr & (UART_IIR_RDI | UART_IIR_RDI_TIMEOUT)) { + /* Read data from uart -> queue */ + brd->intr_rx++; + ch->ch_intr_rx++; + cls_copy_data_from_uart_to_queue(ch); + dgnc_check_queue_flow_control(ch); + } + + /* Transmit Hold register empty pending */ + if (isr & UART_IIR_THRI) { + /* Transfer data (if any) from Write Queue -> UART. */ + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + brd->intr_tx++; + ch->ch_intr_tx++; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + cls_copy_data_from_queue_to_uart(ch); + } + + /* Received Xoff signal/Special character */ + if (isr & UART_IIR_XOFF) { + /* Empty */ + } + + /* CTS/RTS change of state */ + if (isr & UART_IIR_CTSRTS) { + brd->intr_modem++; + ch->ch_intr_modem++; + /* + * Don't need to do anything, the cls_parse_modem + * below will grab the updated modem signals. + */ + } + + /* Parse any modem signal changes */ + DPR_INTR(("MOD_STAT: sending to parse_modem_sigs\n")); + cls_parse_modem(ch, readb(&ch->ch_cls_uart->msr)); + } +} + + +/* + * cls_param() + * Send any/all changes to the line to the UART. + */ +static void cls_param(struct tty_struct *tty) +{ + uchar lcr = 0; + uchar uart_lcr = 0; + uchar ier = 0; + uchar uart_ier = 0; + uint baud = 9600; + int quot = 0; + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!tty || tty->magic != TTY_MAGIC) { + return; + } + + un = (struct un_t *) tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) { + return; + } + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) { + return; + } + + DPR_PARAM(("param start: tdev: %x cflags: %x oflags: %x iflags: %x\n", + ch->ch_tun.un_dev, ch->ch_c_cflag, ch->ch_c_oflag, ch->ch_c_iflag)); + + /* + * If baud rate is zero, flush queues, and set mval to drop DTR. + */ + if ((ch->ch_c_cflag & (CBAUD)) == 0) { + ch->ch_r_head = ch->ch_r_tail = 0; + ch->ch_e_head = ch->ch_e_tail = 0; + ch->ch_w_head = ch->ch_w_tail = 0; + + cls_flush_uart_write(ch); + cls_flush_uart_read(ch); + + /* The baudrate is B0 so all modem lines are to be dropped. */ + ch->ch_flags |= (CH_BAUD0); + ch->ch_mostat &= ~(UART_MCR_RTS | UART_MCR_DTR); + cls_assert_modem_signals(ch); + ch->ch_old_baud = 0; + return; + } else if (ch->ch_custom_speed) { + + baud = ch->ch_custom_speed; + /* Handle transition from B0 */ + if (ch->ch_flags & CH_BAUD0) { + ch->ch_flags &= ~(CH_BAUD0); + + /* + * Bring back up RTS and DTR... + * Also handle RTS or DTR toggle if set. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + } + + } else { + int iindex = 0; + int jindex = 0; + + ulong bauds[4][16] = { + { /* slowbaud */ + 0, 50, 75, 110, + 134, 150, 200, 300, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* slowbaud & CBAUDEX */ + 0, 57600, 115200, 230400, + 460800, 150, 200, 921600, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* fastbaud */ + 0, 57600, 76800, 115200, + 131657, 153600, 230400, 460800, + 921600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* fastbaud & CBAUDEX */ + 0, 57600, 115200, 230400, + 460800, 150, 200, 921600, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 } + }; + + /* Only use the TXPrint baud rate if the terminal unit is NOT open */ + if (!(ch->ch_tun.un_flags & UN_ISOPEN) && (un->un_type == DGNC_PRINT)) + baud = C_BAUD(ch->ch_pun.un_tty) & 0xff; + else + baud = C_BAUD(ch->ch_tun.un_tty) & 0xff; + + if (ch->ch_c_cflag & CBAUDEX) + iindex = 1; + + if (ch->ch_digi.digi_flags & DIGI_FAST) + iindex += 2; + + jindex = baud; + + if ((iindex >= 0) && (iindex < 4) && (jindex >= 0) && (jindex < 16)) { + baud = bauds[iindex][jindex]; + } else { + DPR_IOCTL(("baud indices were out of range (%d)(%d)", + iindex, jindex)); + baud = 0; + } + + if (baud == 0) + baud = 9600; + + /* Handle transition from B0 */ + if (ch->ch_flags & CH_BAUD0) { + ch->ch_flags &= ~(CH_BAUD0); + + /* + * Bring back up RTS and DTR... + * Also handle RTS or DTR toggle if set. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + } + } + + if (ch->ch_c_cflag & PARENB) { + lcr |= UART_LCR_PARITY; + } + + if (!(ch->ch_c_cflag & PARODD)) { + lcr |= UART_LCR_EPAR; + } + + /* + * Not all platforms support mark/space parity, + * so this will hide behind an ifdef. + */ +#ifdef CMSPAR + if (ch->ch_c_cflag & CMSPAR) + lcr |= UART_LCR_SPAR; +#endif + + if (ch->ch_c_cflag & CSTOPB) + lcr |= UART_LCR_STOP; + + switch (ch->ch_c_cflag & CSIZE) { + case CS5: + lcr |= UART_LCR_WLEN5; + break; + case CS6: + lcr |= UART_LCR_WLEN6; + break; + case CS7: + lcr |= UART_LCR_WLEN7; + break; + case CS8: + default: + lcr |= UART_LCR_WLEN8; + break; + } + + ier = uart_ier = readb(&ch->ch_cls_uart->ier); + uart_lcr = readb(&ch->ch_cls_uart->lcr); + + if (baud == 0) + baud = 9600; + + quot = ch->ch_bd->bd_dividend / baud; + + if (quot != 0 && ch->ch_old_baud != baud) { + ch->ch_old_baud = baud; + writeb(UART_LCR_DLAB, &ch->ch_cls_uart->lcr); + writeb((quot & 0xff), &ch->ch_cls_uart->txrx); + writeb((quot >> 8), &ch->ch_cls_uart->ier); + writeb(lcr, &ch->ch_cls_uart->lcr); + } + + if (uart_lcr != lcr) + writeb(lcr, &ch->ch_cls_uart->lcr); + + if (ch->ch_c_cflag & CREAD) { + ier |= (UART_IER_RDI | UART_IER_RLSI); + } + else { + ier &= ~(UART_IER_RDI | UART_IER_RLSI); + } + + /* + * Have the UART interrupt on modem signal changes ONLY when + * we are in hardware flow control mode, or CLOCAL/FORCEDCD is not set. + */ + if ((ch->ch_digi.digi_flags & CTSPACE) || (ch->ch_digi.digi_flags & RTSPACE) || + (ch->ch_c_cflag & CRTSCTS) || !(ch->ch_digi.digi_flags & DIGI_FORCEDCD) || + !(ch->ch_c_cflag & CLOCAL)) + { + ier |= UART_IER_MSI; + } + else { + ier &= ~UART_IER_MSI; + } + + ier |= UART_IER_THRI; + + if (ier != uart_ier) + writeb(ier, &ch->ch_cls_uart->ier); + + if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) { + cls_set_cts_flow_control(ch); + } + else if (ch->ch_c_iflag & IXON) { + /* If start/stop is set to disable, then we should disable flow control */ + if ((ch->ch_startc == _POSIX_VDISABLE) || (ch->ch_stopc == _POSIX_VDISABLE)) + cls_set_no_output_flow_control(ch); + else + cls_set_ixon_flow_control(ch); + } + else { + cls_set_no_output_flow_control(ch); + } + + if (ch->ch_digi.digi_flags & RTSPACE || ch->ch_c_cflag & CRTSCTS) { + cls_set_rts_flow_control(ch); + } + else if (ch->ch_c_iflag & IXOFF) { + /* If start/stop is set to disable, then we should disable flow control */ + if ((ch->ch_startc == _POSIX_VDISABLE) || (ch->ch_stopc == _POSIX_VDISABLE)) + cls_set_no_input_flow_control(ch); + else + cls_set_ixoff_flow_control(ch); + } + else { + cls_set_no_input_flow_control(ch); + } + + cls_assert_modem_signals(ch); + + /* Get current status of the modem signals now */ + cls_parse_modem(ch, readb(&ch->ch_cls_uart->msr)); +} + + +/* + * Our board poller function. + */ +static void cls_tasklet(unsigned long data) +{ + struct board_t *bd = (struct board_t *) data; + struct channel_t *ch; + ulong lock_flags; + int i; + int state = 0; + int ports = 0; + + if (!bd || bd->magic != DGNC_BOARD_MAGIC) { + APR(("poll_tasklet() - NULL or bad bd.\n")); + return; + } + + /* Cache a couple board values */ + DGNC_LOCK(bd->bd_lock, lock_flags); + state = bd->state; + ports = bd->nasync; + DGNC_UNLOCK(bd->bd_lock, lock_flags); + + /* + * Do NOT allow the interrupt routine to read the intr registers + * Until we release this lock. + */ + DGNC_LOCK(bd->bd_intr_lock, lock_flags); + + /* + * If board is ready, parse deeper to see if there is anything to do. + */ + if ((state == BOARD_READY) && (ports > 0)) { + + /* Loop on each port */ + for (i = 0; i < ports; i++) { + ch = bd->channels[i]; + if (!ch) + continue; + + /* + * NOTE: Remember you CANNOT hold any channel + * locks when calling input. + * During input processing, its possible we + * will call ld, which might do callbacks back + * into us. + */ + dgnc_input(ch); + + /* + * Channel lock is grabbed and then released + * inside this routine. + */ + cls_copy_data_from_queue_to_uart(ch); + dgnc_wakeup_writes(ch); + + /* + * Check carrier function. + */ + dgnc_carrier(ch); + + /* + * The timing check of turning off the break is done + * inside clear_break() + */ + if (ch->ch_stop_sending_break) + cls_clear_break(ch, 0); + } + } + + DGNC_UNLOCK(bd->bd_intr_lock, lock_flags); + +} + + +/* + * cls_intr() + * + * Classic specific interrupt handler. + */ +static irqreturn_t cls_intr(int irq, void *voidbrd) +{ + struct board_t *brd = (struct board_t *) voidbrd; + uint i = 0; + uchar poll_reg; + unsigned long lock_flags; + + if (!brd) { + APR(("Received interrupt (%d) with null board associated\n", irq)); + return IRQ_NONE; + } + + /* + * Check to make sure its for us. + */ + if (brd->magic != DGNC_BOARD_MAGIC) { + APR(("Received interrupt (%d) with a board pointer that wasn't ours!\n", irq)); + return IRQ_NONE; + } + + DGNC_LOCK(brd->bd_intr_lock, lock_flags); + + brd->intr_count++; + + /* + * Check the board's global interrupt offset to see if we + * we actually do have an interrupt pending for us. + */ + poll_reg = readb(brd->re_map_membase + UART_CLASSIC_POLL_ADDR_OFFSET); + + /* If 0, no interrupts pending */ + if (!poll_reg) { + DPR_INTR(("Kernel interrupted to me, but no pending interrupts...\n")); + DGNC_UNLOCK(brd->bd_intr_lock, lock_flags); + return IRQ_NONE; + } + + DPR_INTR(("%s:%d poll_reg: %x\n", __FILE__, __LINE__, poll_reg)); + + /* Parse each port to find out what caused the interrupt */ + for (i = 0; i < brd->nasync; i++) { + cls_parse_isr(brd, i); + } + + /* + * Schedule tasklet to more in-depth servicing at a better time. + */ + tasklet_schedule(&brd->helper_tasklet); + + DGNC_UNLOCK(brd->bd_intr_lock, lock_flags); + + DPR_INTR(("dgnc_intr finish.\n")); + return IRQ_HANDLED; +} + + +static void cls_disable_receiver(struct channel_t *ch) +{ + uchar tmp = readb(&ch->ch_cls_uart->ier); + tmp &= ~(UART_IER_RDI); + writeb(tmp, &ch->ch_cls_uart->ier); +} + + +static void cls_enable_receiver(struct channel_t *ch) +{ + uchar tmp = readb(&ch->ch_cls_uart->ier); + tmp |= (UART_IER_RDI); + writeb(tmp, &ch->ch_cls_uart->ier); +} + + +static void cls_copy_data_from_uart_to_queue(struct channel_t *ch) +{ + int qleft = 0; + uchar linestatus = 0; + uchar error_mask = 0; + ushort head; + ushort tail; + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* cache head and tail of queue */ + head = ch->ch_r_head; + tail = ch->ch_r_tail; + + /* Store how much space we have left in the queue */ + if ((qleft = tail - head - 1) < 0) + qleft += RQUEUEMASK + 1; + + /* + * Create a mask to determine whether we should + * insert the character (if any) into our queue. + */ + if (ch->ch_c_iflag & IGNBRK) + error_mask |= UART_LSR_BI; + + while (1) { + linestatus = readb(&ch->ch_cls_uart->lsr); + + if (!(linestatus & (UART_LSR_DR))) + break; + + /* + * Discard character if we are ignoring the error mask. + */ + if (linestatus & error_mask) { + uchar discard; + linestatus = 0; + discard = readb(&ch->ch_cls_uart->txrx); + continue; + } + + /* + * If our queue is full, we have no choice but to drop some data. + * The assumption is that HWFLOW or SWFLOW should have stopped + * things way way before we got to this point. + * + * I decided that I wanted to ditch the oldest data first, + * I hope thats okay with everyone? Yes? Good. + */ + while (qleft < 1) { + DPR_READ(("Queue full, dropping DATA:%x LSR:%x\n", + ch->ch_rqueue[tail], ch->ch_equeue[tail])); + + ch->ch_r_tail = tail = (tail + 1) & RQUEUEMASK; + ch->ch_err_overrun++; + qleft++; + } + + ch->ch_equeue[head] = linestatus & (UART_LSR_BI | UART_LSR_PE | UART_LSR_FE); + ch->ch_rqueue[head] = readb(&ch->ch_cls_uart->txrx); + dgnc_sniff_nowait_nolock(ch, "UART READ", ch->ch_rqueue + head, 1); + + qleft--; + + DPR_READ(("DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head])); + + if (ch->ch_equeue[head] & UART_LSR_PE) + ch->ch_err_parity++; + if (ch->ch_equeue[head] & UART_LSR_BI) + ch->ch_err_break++; + if (ch->ch_equeue[head] & UART_LSR_FE) + ch->ch_err_frame++; + + /* Add to, and flip head if needed */ + head = (head + 1) & RQUEUEMASK; + ch->ch_rxcount++; + } + + /* + * Write new final heads to channel structure. + */ + ch->ch_r_head = head & RQUEUEMASK; + ch->ch_e_head = head & EQUEUEMASK; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +/* + * This function basically goes to sleep for secs, or until + * it gets signalled that the port has fully drained. + */ +static int cls_drain(struct tty_struct *tty, uint seconds) +{ + ulong lock_flags; + struct channel_t *ch; + struct un_t *un; + int rc = 0; + + if (!tty || tty->magic != TTY_MAGIC) { + return (-ENXIO); + } + + un = (struct un_t *) tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) { + return (-ENXIO); + } + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return (-ENXIO); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + un->un_flags |= UN_EMPTY; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* + * NOTE: Do something with time passed in. + */ + rc = wait_event_interruptible(un->un_flags_wait, ((un->un_flags & UN_EMPTY) == 0)); + + /* If ret is non-zero, user ctrl-c'ed us */ + if (rc) + DPR_IOCTL(("%d Drain - User ctrl c'ed\n", __LINE__)); + + return (rc); +} + + +/* Channel lock MUST be held before calling this function! */ +static void cls_flush_uart_write(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT), &ch->ch_cls_uart->isr_fcr); + udelay(10); + + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); +} + + +/* Channel lock MUST be held before calling this function! */ +static void cls_flush_uart_read(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + /* + * For complete POSIX compatibility, we should be purging the + * read FIFO in the UART here. + * + * However, doing the statement below also incorrectly flushes + * write data as well as just basically trashing the FIFO. + * + * I believe this is a BUG in this UART. + * So for now, we will leave the code #ifdef'ed out... + */ +#if 0 + writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR), &ch->ch_cls_uart->isr_fcr); +#endif + udelay(10); +} + + +static void cls_copy_data_from_queue_to_uart(struct channel_t *ch) +{ + ushort head; + ushort tail; + int n; + int qlen; + uint len_written = 0; + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* No data to write to the UART */ + if (ch->ch_w_tail == ch->ch_w_head) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* If port is "stopped", don't send any data to the UART */ + if ((ch->ch_flags & CH_FORCED_STOP) || (ch->ch_flags & CH_BREAK_SENDING)) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + if (!(ch->ch_flags & (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM))) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + n = 32; + + /* cache head and tail of queue */ + head = ch->ch_w_head & WQUEUEMASK; + tail = ch->ch_w_tail & WQUEUEMASK; + qlen = (head - tail) & WQUEUEMASK; + + /* Find minimum of the FIFO space, versus queue length */ + n = min(n, qlen); + + while (n > 0) { + + /* + * If RTS Toggle mode is on, turn on RTS now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_RTS)) { + ch->ch_mostat |= (UART_MCR_RTS); + cls_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + + /* + * If DTR Toggle mode is on, turn on DTR now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_DTR)) { + ch->ch_mostat |= (UART_MCR_DTR); + cls_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + writeb(ch->ch_wqueue[ch->ch_w_tail], &ch->ch_cls_uart->txrx); + dgnc_sniff_nowait_nolock(ch, "UART WRITE", ch->ch_wqueue + ch->ch_w_tail, 1); + DPR_WRITE(("Tx data: %x\n", ch->ch_wqueue[ch->ch_w_tail])); + ch->ch_w_tail++; + ch->ch_w_tail &= WQUEUEMASK; + ch->ch_txcount++; + len_written++; + n--; + } + + if (len_written > 0) + ch->ch_flags &= ~(CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + return; +} + + +static void cls_parse_modem(struct channel_t *ch, uchar signals) +{ + volatile uchar msignals = signals; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DPR_MSIGS(("cls_parse_modem: port: %d signals: %d\n", ch->ch_portnum, msignals)); + + /* + * Do altpin switching. Altpin switches DCD and DSR. + * This prolly breaks DSRPACE, so we should be more clever here. + */ + if (ch->ch_digi.digi_flags & DIGI_ALTPIN) { + uchar mswap = signals; + if (mswap & UART_MSR_DDCD) { + msignals &= ~UART_MSR_DDCD; + msignals |= UART_MSR_DDSR; + } + if (mswap & UART_MSR_DDSR) { + msignals &= ~UART_MSR_DDSR; + msignals |= UART_MSR_DDCD; + } + if (mswap & UART_MSR_DCD) { + msignals &= ~UART_MSR_DCD; + msignals |= UART_MSR_DSR; + } + if (mswap & UART_MSR_DSR) { + msignals &= ~UART_MSR_DSR; + msignals |= UART_MSR_DCD; + } + } + + /* Scrub off lower bits. They signify delta's, which I don't care about */ + signals &= 0xf0; + + if (msignals & UART_MSR_DCD) + ch->ch_mistat |= UART_MSR_DCD; + else + ch->ch_mistat &= ~UART_MSR_DCD; + + if (msignals & UART_MSR_DSR) + ch->ch_mistat |= UART_MSR_DSR; + else + ch->ch_mistat &= ~UART_MSR_DSR; + + if (msignals & UART_MSR_RI) + ch->ch_mistat |= UART_MSR_RI; + else + ch->ch_mistat &= ~UART_MSR_RI; + + if (msignals & UART_MSR_CTS) + ch->ch_mistat |= UART_MSR_CTS; + else + ch->ch_mistat &= ~UART_MSR_CTS; + + + DPR_MSIGS(("Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n", + ch->ch_portnum, + !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_CTS), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DSR), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_RI), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DCD))); +} + + +/* Make the UART raise any of the output signals we want up */ +static void cls_assert_modem_signals(struct channel_t *ch) +{ + uchar out; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + out = ch->ch_mostat; + + if (ch->ch_flags & CH_LOOPBACK) + out |= UART_MCR_LOOP; + + writeb(out, &ch->ch_cls_uart->mcr); + + /* Give time for the UART to actually drop the signals */ + udelay(10); +} + + +static void cls_send_start_character(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + if (ch->ch_startc != _POSIX_VDISABLE) { + ch->ch_xon_sends++; + writeb(ch->ch_startc, &ch->ch_cls_uart->txrx); + } +} + + +static void cls_send_stop_character(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + if (ch->ch_stopc != _POSIX_VDISABLE) { + ch->ch_xoff_sends++; + writeb(ch->ch_stopc, &ch->ch_cls_uart->txrx); + } +} + + +/* Inits UART */ +static void cls_uart_init(struct channel_t *ch) +{ + uchar lcrb = readb(&ch->ch_cls_uart->lcr); + uchar isr_fcr = 0; + + writeb(0, &ch->ch_cls_uart->ier); + + /* + * The Enhanced Register Set may only be accessed when + * the Line Control Register is set to 0xBFh. + */ + writeb(UART_EXAR654_ENHANCED_REGISTER_SET, &ch->ch_cls_uart->lcr); + + isr_fcr = readb(&ch->ch_cls_uart->isr_fcr); + + /* Turn on Enhanced/Extended controls */ + isr_fcr |= (UART_EXAR654_EFR_ECB); + + writeb(isr_fcr, &ch->ch_cls_uart->isr_fcr); + + /* Write old LCR value back out, which turns enhanced access off */ + writeb(lcrb, &ch->ch_cls_uart->lcr); + + /* Clear out UART and FIFO */ + readb(&ch->ch_cls_uart->txrx); + + writeb((UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|UART_FCR_CLEAR_XMIT), &ch->ch_cls_uart->isr_fcr); + udelay(10); + + ch->ch_flags |= (CH_FIFO_ENABLED | CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + + readb(&ch->ch_cls_uart->lsr); + readb(&ch->ch_cls_uart->msr); +} + + +/* + * Turns off UART. + */ +static void cls_uart_off(struct channel_t *ch) +{ + writeb(0, &ch->ch_cls_uart->ier); +} + + +/* + * cls_get_uarts_bytes_left. + * Returns 0 is nothing left in the FIFO, returns 1 otherwise. + * + * The channel lock MUST be held by the calling function. + */ +static uint cls_get_uart_bytes_left(struct channel_t *ch) +{ + uchar left = 0; + uchar lsr = 0; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return 0; + + lsr = readb(&ch->ch_cls_uart->lsr); + + /* Determine whether the Transmitter is empty or not */ + if (!(lsr & UART_LSR_TEMT)) { + if (ch->ch_flags & CH_TX_FIFO_EMPTY) { + tasklet_schedule(&ch->ch_bd->helper_tasklet); + } + left = 1; + } + else { + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + left = 0; + } + + return left; +} + + +/* + * cls_send_break. + * Starts sending a break thru the UART. + * + * The channel lock MUST be held by the calling function. + */ +static void cls_send_break(struct channel_t *ch, int msecs) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + /* + * If we receive a time of 0, this means turn off the break. + */ + if (msecs == 0) { + /* Turn break off, and unset some variables */ + if (ch->ch_flags & CH_BREAK_SENDING) { + uchar temp = readb(&ch->ch_cls_uart->lcr); + writeb((temp & ~UART_LCR_SBC), &ch->ch_cls_uart->lcr); + ch->ch_flags &= ~(CH_BREAK_SENDING); + ch->ch_stop_sending_break = 0; + DPR_IOCTL(("Finishing UART_LCR_SBC! finished: %lx\n", jiffies)); + } + return; + } + + /* + * Set the time we should stop sending the break. + * If we are already sending a break, toss away the existing + * time to stop, and use this new value instead. + */ + ch->ch_stop_sending_break = jiffies + dgnc_jiffies_from_ms(msecs); + + /* Tell the UART to start sending the break */ + if (!(ch->ch_flags & CH_BREAK_SENDING)) { + uchar temp = readb(&ch->ch_cls_uart->lcr); + writeb((temp | UART_LCR_SBC), &ch->ch_cls_uart->lcr); + ch->ch_flags |= (CH_BREAK_SENDING); + DPR_IOCTL(("Port %d. Starting UART_LCR_SBC! start: %lx should end: %lx\n", + ch->ch_portnum, jiffies, ch->ch_stop_sending_break)); + } +} + + +/* + * cls_send_immediate_char. + * Sends a specific character as soon as possible to the UART, + * jumping over any bytes that might be in the write queue. + * + * The channel lock MUST be held by the calling function. + */ +static void cls_send_immediate_char(struct channel_t *ch, unsigned char c) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + writeb(c, &ch->ch_cls_uart->txrx); +} + +static void cls_vpd(struct board_t *brd) +{ + ulong vpdbase; /* Start of io base of the card */ + uchar *re_map_vpdbase;/* Remapped memory of the card */ + int i = 0; + + + vpdbase = pci_resource_start(brd->pdev, 3); + + /* No VPD */ + if (!vpdbase) + return; + + re_map_vpdbase = ioremap(vpdbase, 0x400); + + if (!re_map_vpdbase) + return; + + /* Store the VPD into our buffer */ + for (i = 0; i < 0x40; i++) { + brd->vpd[i] = readb(re_map_vpdbase + i); + printk("%x ", brd->vpd[i]); + } + printk("\n"); + + if (re_map_vpdbase) + iounmap(re_map_vpdbase); +} + diff --git a/drivers/staging/dgnc/dgnc_cls.h b/drivers/staging/dgnc/dgnc_cls.h new file mode 100644 index 0000000..dca5ea3 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_cls.h @@ -0,0 +1,90 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + */ + +#ifndef __DGNC_CLS_H +#define __DGNC_CLS_H + +#include "dgnc_types.h" + + +/************************************************************************ + * Per channel/port Classic UART structure * + ************************************************************************ + * Base Structure Entries Usage Meanings to Host * + * * + * W = read write R = read only * + * U = Unused. * + ************************************************************************/ + +struct cls_uart_struct { + volatile uchar txrx; /* WR RHR/THR - Holding Reg */ + volatile uchar ier; /* WR IER - Interrupt Enable Reg */ + volatile uchar isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */ + volatile uchar lcr; /* WR LCR - Line Control Reg */ + volatile uchar mcr; /* WR MCR - Modem Control Reg */ + volatile uchar lsr; /* WR LSR - Line Status Reg */ + volatile uchar msr; /* WR MSR - Modem Status Reg */ + volatile uchar spr; /* WR SPR - Scratch Pad Reg */ +}; + +/* Where to read the interrupt register (8bits) */ +#define UART_CLASSIC_POLL_ADDR_OFFSET 0x40 + +#define UART_EXAR654_ENHANCED_REGISTER_SET 0xBF + +#define UART_16654_FCR_TXTRIGGER_8 0x0 +#define UART_16654_FCR_TXTRIGGER_16 0x10 +#define UART_16654_FCR_TXTRIGGER_32 0x20 +#define UART_16654_FCR_TXTRIGGER_56 0x30 + +#define UART_16654_FCR_RXTRIGGER_8 0x0 +#define UART_16654_FCR_RXTRIGGER_16 0x40 +#define UART_16654_FCR_RXTRIGGER_56 0x80 +#define UART_16654_FCR_RXTRIGGER_60 0xC0 + +#define UART_IIR_XOFF 0x10 /* Received Xoff signal/Special character */ +#define UART_IIR_CTSRTS 0x20 /* Received CTS/RTS change of state */ +#define UART_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ + +/* + * These are the EXTENDED definitions for the Exar 654's Interrupt + * Enable Register. + */ +#define UART_EXAR654_EFR_ECB 0x10 /* Enhanced control bit */ +#define UART_EXAR654_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ +#define UART_EXAR654_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ +#define UART_EXAR654_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ +#define UART_EXAR654_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ + +#define UART_EXAR654_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ +#define UART_EXAR654_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ + +#define UART_EXAR654_IER_XOFF 0x20 /* Xoff Interrupt Enable */ +#define UART_EXAR654_IER_RTSDTR 0x40 /* Output Interrupt Enable */ +#define UART_EXAR654_IER_CTSDSR 0x80 /* Input Interrupt Enable */ + +/* + * Our Global Variables + */ +extern struct board_ops dgnc_cls_ops; + +#endif diff --git a/drivers/staging/dgnc/dgnc_driver.c b/drivers/staging/dgnc/dgnc_driver.c new file mode 100644 index 0000000..7c88de7 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_driver.c @@ -0,0 +1,1028 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + * $Id: dgnc_driver.c,v 1.3 2011/06/23 12:47:35 markh Exp $ + * + */ + + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/module.h> +#include <linux/pci.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) +#include <linux/sched.h> +#endif + +#include "dgnc_driver.h" +#include "dgnc_pci.h" +#include "dgnc_proc.h" +#include "dpacompat.h" +#include "dgnc_mgmt.h" +#include "dgnc_tty.h" +#include "dgnc_trace.h" +#include "dgnc_cls.h" +#include "dgnc_neo.h" +#include "dgnc_sysfs.h" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Digi International, http://www.digi.com";); +MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line"); +MODULE_SUPPORTED_DEVICE("dgnc"); + +/* + * insmod command line overrideable parameters + * + * NOTE: we use a set of macros to create the variables, which allows + * us to specify the variable type, name, initial value, and description. + */ +PARM_INT(debug, 0x00, 0644, "Driver debugging level"); +PARM_INT(rawreadok, 1, 0644, "Bypass flip buffers on input"); +PARM_INT(trcbuf_size, 0x100000, 0644, "Debugging trace buffer size."); + +/************************************************************************** + * + * protos for this file + * + */ +static int dgnc_start(void); +static int dgnc_finalize_board_init(struct board_t *brd); +static void dgnc_init_globals(void); +static int dgnc_found_board(struct pci_dev *pdev, int id); +static void dgnc_cleanup_board(struct board_t *brd); +static void dgnc_poll_handler(ulong dummy); +static int dgnc_init_pci(void); +static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); +static void dgnc_remove_one(struct pci_dev *dev); +static int dgnc_probe1(struct pci_dev *pdev, int card_type); +static void dgnc_do_remap(struct board_t *brd); +static void dgnc_mbuf(struct board_t *brd, const char *fmt, ...); + + +/* Driver load/unload functions */ +int dgnc_init_module(void); +void dgnc_cleanup_module(void); + +module_init(dgnc_init_module); +module_exit(dgnc_cleanup_module); + + +/* + * File operations permitted on Control/Management major. + */ +static struct file_operations dgnc_BoardFops = +{ + .owner = THIS_MODULE, +#ifdef HAVE_UNLOCKED_IOCTL + .unlocked_ioctl = dgnc_mgmt_ioctl, +#else + .ioctl = dgnc_mgmt_ioctl, +#endif + .open = dgnc_mgmt_open, + .release = dgnc_mgmt_close +}; + + +/* + * Globals + */ +uint dgnc_NumBoards; +struct board_t *dgnc_Board[MAXBOARDS]; +DEFINE_SPINLOCK(dgnc_global_lock); +int dgnc_driver_state = DRIVER_INITIALIZED; +ulong dgnc_poll_counter; +uint dgnc_Major; +int dgnc_poll_tick = 20; /* Poll interval - 20 ms */ + +/* + * Static vars. + */ +static uint dgnc_Major_Control_Registered = FALSE; +static uint dgnc_driver_start = FALSE; + +static struct class *dgnc_class; + +/* + * Poller stuff + */ +static DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */ +static ulong dgnc_poll_time; /* Time of next poll */ +static uint dgnc_poll_stop; /* Used to tell poller to stop */ +static struct timer_list dgnc_poll_timer; + + +static struct pci_device_id dgnc_pci_tbl[] = { + { DIGI_VID, PCI_DEVICE_CLASSIC_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, + { DIGI_VID, PCI_DEVICE_CLASSIC_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 }, + { DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 }, + { DIGI_VID, PCI_DEVICE_NEO_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 }, + { DIGI_VID, PCI_DEVICE_NEO_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 }, + { DIGI_VID, PCI_DEVICE_NEO_2DB9_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 }, + { DIGI_VID, PCI_DEVICE_NEO_2DB9PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 }, + { DIGI_VID, PCI_DEVICE_NEO_2RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 }, + { DIGI_VID, PCI_DEVICE_NEO_2RJ45PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 }, + { DIGI_VID, PCI_DEVICE_NEO_1_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 }, + { DIGI_VID, PCI_DEVICE_NEO_1_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 }, + { DIGI_VID, PCI_DEVICE_NEO_2_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 }, + { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13 }, + { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14 }, + { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 15 }, + { DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 16 }, + {0,} /* 0 terminated list. */ +}; +MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl); + +struct board_id { + uchar *name; + uint maxports; + unsigned int is_pci_express; +}; + +static struct board_id dgnc_Ids[] = +{ + { PCI_DEVICE_CLASSIC_4_PCI_NAME, 4, 0 }, + { PCI_DEVICE_CLASSIC_4_422_PCI_NAME, 4, 0 }, + { PCI_DEVICE_CLASSIC_8_PCI_NAME, 8, 0 }, + { PCI_DEVICE_CLASSIC_8_422_PCI_NAME, 8, 0 }, + { PCI_DEVICE_NEO_4_PCI_NAME, 4, 0 }, + { PCI_DEVICE_NEO_8_PCI_NAME, 8, 0 }, + { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2, 0 }, + { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2, 0 }, + { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2, 0 }, + { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2, 0 }, + { PCI_DEVICE_NEO_1_422_PCI_NAME, 1, 0 }, + { PCI_DEVICE_NEO_1_422_485_PCI_NAME, 1, 0 }, + { PCI_DEVICE_NEO_2_422_485_PCI_NAME, 2, 0 }, + { PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME, 8, 1 }, + { PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME, 4, 1 }, + { PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME, 4, 1 }, + { PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME, 8, 1 }, + { NULL, 0, 0 } +}; + +static struct pci_driver dgnc_driver = { + .name = "dgnc", + .probe = dgnc_init_one, + .id_table = dgnc_pci_tbl, + .remove = dgnc_remove_one, +}; + + +char *dgnc_state_text[] = { + "Board Failed", + "Board Found", + "Board READY", +}; + +char *dgnc_driver_state_text[] = { + "Driver Initialized", + "Driver Ready." +}; + + + +/************************************************************************ + * + * Driver load/unload functions + * + ************************************************************************/ + + +/* + * init_module() + * + * Module load. This is where it all starts. + */ +int dgnc_init_module(void) +{ + int rc = 0; + + APR(("%s, Digi International Part Number %s\n", DG_NAME, DG_PART)); + + /* + * Initialize global stuff + */ + rc = dgnc_start(); + + if (rc < 0) { + return(rc); + } + + /* + * Find and configure all the cards + */ + rc = dgnc_init_pci(); + + /* + * If something went wrong in the scan, bail out of driver. + */ + if (rc < 0) { + /* Only unregister the pci driver if it was actually registered. */ + if (dgnc_NumBoards) + pci_unregister_driver(&dgnc_driver); + else + printk("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n"); + + dgnc_cleanup_module(); + } + else { + dgnc_create_driver_sysfiles(&dgnc_driver); + } + + DPR_INIT(("Finished init_module. Returning %d\n", rc)); + return (rc); +} + + +/* + * Start of driver. + */ +static int dgnc_start(void) +{ + int rc = 0; + unsigned long flags; + + if (dgnc_driver_start == FALSE) { + + dgnc_driver_start = TRUE; + + /* make sure that the globals are init'd before we do anything else */ + dgnc_init_globals(); + + dgnc_NumBoards = 0; + + APR(("For the tools package or updated drivers please visit http://www.digi.com\n";)); + + /* + * Register our base character device into the kernel. + * This allows the download daemon to connect to the downld device + * before any of the boards are init'ed. + */ + if (!dgnc_Major_Control_Registered) { + /* + * Register management/dpa devices + */ + rc = register_chrdev(0, "dgnc", &dgnc_BoardFops); + if (rc <= 0) { + APR(("Can't register dgnc driver device (%d)\n", rc)); + rc = -ENXIO; + return(rc); + } + dgnc_Major = rc; + + dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt"); +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) + device_create_drvdata(dgnc_class, NULL, + MKDEV(dgnc_Major, 0), + NULL, "dgnc_mgmt"); +#else + device_create(dgnc_class, NULL, + MKDEV(dgnc_Major, 0), + NULL, "dgnc_mgmt"); +#endif + + dgnc_Major_Control_Registered = TRUE; + } + + /* + * Register our basic stuff in /proc/dgnc + */ + dgnc_proc_register_basic_prescan(); + + /* + * Init any global tty stuff. + */ + rc = dgnc_tty_preinit(); + + if (rc < 0) { + APR(("tty preinit - not enough memory (%d)\n", rc)); + return(rc); + } + + /* Start the poller */ + DGNC_LOCK(dgnc_poll_lock, flags); + init_timer(&dgnc_poll_timer); + dgnc_poll_timer.function = dgnc_poll_handler; + dgnc_poll_timer.data = 0; + dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); + dgnc_poll_timer.expires = dgnc_poll_time; + DGNC_UNLOCK(dgnc_poll_lock, flags); + + add_timer(&dgnc_poll_timer); + + dgnc_driver_state = DRIVER_READY; + } + + return(rc); +} + +/* + * Register pci driver, and return how many boards we have. + */ +static int dgnc_init_pci(void) +{ + return pci_register_driver(&dgnc_driver); +} + + +/* returns count (>= 0), or negative on error */ +static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + int rc; + + /* wake up and enable device */ + rc = pci_enable_device(pdev); + + if (rc < 0) { + rc = -EIO; + } else { + rc = dgnc_probe1(pdev, ent->driver_data); + if (rc == 0) { + dgnc_NumBoards++; + DPR_INIT(("Incrementing numboards to %d\n", dgnc_NumBoards)); + } + } + return rc; +} + +static int dgnc_probe1(struct pci_dev *pdev, int card_type) +{ + return dgnc_found_board(pdev, card_type); +} + + +static void dgnc_remove_one(struct pci_dev *dev) +{ + /* Do Nothing */ +} + +/* + * dgnc_cleanup_module() + * + * Module unload. This is where it all ends. + */ +void dgnc_cleanup_module(void) +{ + int i; + ulong lock_flags; + + DGNC_LOCK(dgnc_poll_lock, lock_flags); + dgnc_poll_stop = 1; + DGNC_UNLOCK(dgnc_poll_lock, lock_flags); + + /* Turn off poller right away. */ + del_timer_sync(&dgnc_poll_timer); + + dgnc_proc_unregister_all(); + + dgnc_remove_driver_sysfiles(&dgnc_driver); + + if (dgnc_Major_Control_Registered) { + device_destroy(dgnc_class, MKDEV(dgnc_Major, 0)); + class_destroy(dgnc_class); + unregister_chrdev(dgnc_Major, "dgnc"); + } + + for (i = 0; i < dgnc_NumBoards; ++i) { + dgnc_remove_ports_sysfiles(dgnc_Board[i]); + dgnc_tty_uninit(dgnc_Board[i]); + dgnc_cleanup_board(dgnc_Board[i]); + } + + dgnc_tty_post_uninit(); + +#if defined(DGNC_TRACER) + /* last thing, make sure we release the tracebuffer */ + dgnc_tracer_free(); +#endif + if (dgnc_NumBoards) + pci_unregister_driver(&dgnc_driver); +} + + +/* + * dgnc_cleanup_board() + * + * Free all the memory associated with a board + */ +static void dgnc_cleanup_board(struct board_t *brd) +{ + int i = 0; + + if(!brd || brd->magic != DGNC_BOARD_MAGIC) + return; + + switch (brd->device) { + case PCI_DEVICE_CLASSIC_4_DID: + case PCI_DEVICE_CLASSIC_8_DID: + case PCI_DEVICE_CLASSIC_4_422_DID: + case PCI_DEVICE_CLASSIC_8_422_DID: + + /* Tell card not to interrupt anymore. */ + outb(0, brd->iobase + 0x4c); + break; + + default: + break; + } + + if (brd->irq) + free_irq(brd->irq, brd); + + tasklet_kill(&brd->helper_tasklet); + + if (brd->re_map_membase) { + iounmap(brd->re_map_membase); + brd->re_map_membase = NULL; + } + + if (brd->msgbuf_head) { + unsigned long flags; + + DGNC_LOCK(dgnc_global_lock, flags); + brd->msgbuf = NULL; + printk(brd->msgbuf_head); + kfree(brd->msgbuf_head); + brd->msgbuf_head = NULL; + DGNC_UNLOCK(dgnc_global_lock, flags); + } + + /* Free all allocated channels structs */ + for (i = 0; i < MAXPORTS ; i++) { + if (brd->channels[i]) { + if (brd->channels[i]->ch_rqueue) + kfree(brd->channels[i]->ch_rqueue); + if (brd->channels[i]->ch_equeue) + kfree(brd->channels[i]->ch_equeue); + if (brd->channels[i]->ch_wqueue) + kfree(brd->channels[i]->ch_wqueue); + + kfree(brd->channels[i]); + brd->channels[i] = NULL; + } + } + + if (brd->flipbuf) + kfree(brd->flipbuf); + + dgnc_Board[brd->boardnum] = NULL; + + kfree(brd); +} + + +/* + * dgnc_found_board() + * + * A board has been found, init it. + */ +static int dgnc_found_board(struct pci_dev *pdev, int id) +{ + struct board_t *brd; + unsigned int pci_irq; + int i = 0; + int rc = 0; + unsigned long flags; + + /* get the board structure and prep it */ + brd = dgnc_Board[dgnc_NumBoards] = + (struct board_t *) dgnc_driver_kzmalloc(sizeof(struct board_t), GFP_KERNEL); + if (!brd) { + APR(("memory allocation for board structure failed\n")); + return(-ENOMEM); + } + + /* make a temporary message buffer for the boot messages */ + brd->msgbuf = brd->msgbuf_head = + (char *) dgnc_driver_kzmalloc(sizeof(char) * 8192, GFP_KERNEL); + if (!brd->msgbuf) { + kfree(brd); + APR(("memory allocation for board msgbuf failed\n")); + return(-ENOMEM); + } + + /* store the info for the board we've found */ + brd->magic = DGNC_BOARD_MAGIC; + brd->boardnum = dgnc_NumBoards; + brd->vendor = dgnc_pci_tbl[id].vendor; + brd->device = dgnc_pci_tbl[id].device; + brd->pdev = pdev; + brd->pci_bus = pdev->bus->number; + brd->pci_slot = PCI_SLOT(pdev->devfn); + brd->name = dgnc_Ids[id].name; + brd->maxports = dgnc_Ids[id].maxports; + if (dgnc_Ids[i].is_pci_express) + brd->bd_flags |= BD_IS_PCI_EXPRESS; + brd->dpastatus = BD_NOFEP; + init_waitqueue_head(&brd->state_wait); + + DGNC_SPINLOCK_INIT(brd->bd_lock); + DGNC_SPINLOCK_INIT(brd->bd_intr_lock); + + brd->state = BOARD_FOUND; + + for (i = 0; i < MAXPORTS; i++) { + brd->channels[i] = NULL; + } + + /* store which card & revision we have */ + pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor); + pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice); + pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev); + + pci_irq = pdev->irq; + brd->irq = pci_irq; + + + switch(brd->device) { + + case PCI_DEVICE_CLASSIC_4_DID: + case PCI_DEVICE_CLASSIC_8_DID: + case PCI_DEVICE_CLASSIC_4_422_DID: + case PCI_DEVICE_CLASSIC_8_422_DID: + + brd->dpatype = T_CLASSIC | T_PCIBUS; + + DPR_INIT(("dgnc_found_board - Classic.\n")); + + /* + * For PCI ClassicBoards + * PCI Local Address (i.e. "resource" number) space + * 0 PLX Memory Mapped Config + * 1 PLX I/O Mapped Config + * 2 I/O Mapped UARTs and Status + * 3 Memory Mapped VPD + * 4 Memory Mapped UARTs and Status + */ + + + /* get the PCI Base Address Registers */ + brd->membase = pci_resource_start(pdev, 4); + + if (!brd->membase) { + APR(("card has no PCI IO resources, failing board.\n")); + return -ENODEV; + } + + brd->membase_end = pci_resource_end(pdev, 4); + + if (brd->membase & 1) + brd->membase &= ~3; + else + brd->membase &= ~15; + + brd->iobase = pci_resource_start(pdev, 1); + brd->iobase_end = pci_resource_end(pdev, 1); + brd->iobase = ((unsigned int) (brd->iobase)) & 0xFFFE; + + /* Assign the board_ops struct */ + brd->bd_ops = &dgnc_cls_ops; + + brd->bd_uart_offset = 0x8; + brd->bd_dividend = 921600; + + dgnc_do_remap(brd); + + /* Get and store the board VPD, if it exists */ + brd->bd_ops->vpd(brd); + + /* + * Enable Local Interrupt 1 (0x1), + * Local Interrupt 1 Polarity Active high (0x2), + * Enable PCI interrupt (0x40) + */ + outb(0x43, brd->iobase + 0x4c); + + break; + + + case PCI_DEVICE_NEO_4_DID: + case PCI_DEVICE_NEO_8_DID: + case PCI_DEVICE_NEO_2DB9_DID: + case PCI_DEVICE_NEO_2DB9PRI_DID: + case PCI_DEVICE_NEO_2RJ45_DID: + case PCI_DEVICE_NEO_2RJ45PRI_DID: + case PCI_DEVICE_NEO_1_422_DID: + case PCI_DEVICE_NEO_1_422_485_DID: + case PCI_DEVICE_NEO_2_422_485_DID: + case PCI_DEVICE_NEO_EXPRESS_8_DID: + case PCI_DEVICE_NEO_EXPRESS_4_DID: + case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID: + case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID: + + /* + * This chip is set up 100% when we get to it. + * No need to enable global interrupts or anything. + */ + if (brd->bd_flags & BD_IS_PCI_EXPRESS) + brd->dpatype = T_NEO_EXPRESS | T_PCIBUS; + else + brd->dpatype = T_NEO | T_PCIBUS; + + DPR_INIT(("dgnc_found_board - NEO.\n")); + + /* get the PCI Base Address Registers */ + brd->membase = pci_resource_start(pdev, 0); + brd->membase_end = pci_resource_end(pdev, 0); + + if (brd->membase & 1) + brd->membase &= ~3; + else + brd->membase &= ~15; + + /* Assign the board_ops struct */ + brd->bd_ops = &dgnc_neo_ops; + + brd->bd_uart_offset = 0x200; + brd->bd_dividend = 921600; + + dgnc_do_remap(brd); + + if (brd->re_map_membase) { + + /* After remap is complete, we need to read and store the dvid */ + brd->dvid = readb(brd->re_map_membase + 0x8D); + + /* Get and store the board VPD, if it exists */ + brd->bd_ops->vpd(brd); + } + break; + + default: + APR(("Did not find any compatible Neo or Classic PCI boards in system.\n")); + return (-ENXIO); + + } + + /* + * Do tty device initialization. + */ + + rc = dgnc_tty_register(brd); + if (rc < 0) { + dgnc_tty_uninit(brd); + APR(("Can't register tty devices (%d)\n", rc)); + brd->state = BOARD_FAILED; + brd->dpastatus = BD_NOFEP; + goto failed; + } + + rc = dgnc_finalize_board_init(brd); + if (rc < 0) { + APR(("Can't finalize board init (%d)\n", rc)); + brd->state = BOARD_FAILED; + brd->dpastatus = BD_NOFEP; + + goto failed; + } + + rc = dgnc_tty_init(brd); + if (rc < 0) { + dgnc_tty_uninit(brd); + APR(("Can't init tty devices (%d)\n", rc)); + brd->state = BOARD_FAILED; + brd->dpastatus = BD_NOFEP; + + goto failed; + } + + brd->state = BOARD_READY; + brd->dpastatus = BD_RUNNING; + + dgnc_create_ports_sysfiles(brd); + + /* init our poll helper tasklet */ + tasklet_init(&brd->helper_tasklet, brd->bd_ops->tasklet, (unsigned long) brd); + + /* Log the information about the board */ + dgnc_mbuf(brd, DRVSTR": board %d: %s (rev %d), irq %d\n", + dgnc_NumBoards, brd->name, brd->rev, brd->irq); + + DPR_INIT(("dgnc_scan(%d) - printing out the msgbuf\n", i)); + DGNC_LOCK(dgnc_global_lock, flags); + brd->msgbuf = NULL; + printk(brd->msgbuf_head); + kfree(brd->msgbuf_head); + brd->msgbuf_head = NULL; + DGNC_UNLOCK(dgnc_global_lock, flags); + + /* + * allocate flip buffer for board. + * + * Okay to malloc with GFP_KERNEL, we are not at interrupt + * context, and there are no locks held. + */ + brd->flipbuf = dgnc_driver_kzmalloc(MYFLIPLEN, GFP_KERNEL); + + dgnc_proc_register_basic_postscan(dgnc_NumBoards); + + wake_up_interruptible(&brd->state_wait); + + return(0); + +failed: + + return (-ENXIO); + +} + + +static int dgnc_finalize_board_init(struct board_t *brd) { + int rc = 0; + + DPR_INIT(("dgnc_finalize_board_init() - start\n")); + + if (!brd || brd->magic != DGNC_BOARD_MAGIC) + return(-ENODEV); + + DPR_INIT(("dgnc_finalize_board_init() - start #2\n")); + + if (brd->irq) { + rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "DGNC", brd); + + if (rc) { + printk("Failed to hook IRQ %d\n",brd->irq); + brd->state = BOARD_FAILED; + brd->dpastatus = BD_NOFEP; + rc = -ENODEV; + } else { + DPR_INIT(("Requested and received usage of IRQ %d\n", brd->irq)); + } + } + return(rc); +} + +/* + * Remap PCI memory. + */ +static void dgnc_do_remap(struct board_t *brd) +{ + + if (!brd || brd->magic != DGNC_BOARD_MAGIC) + return; + + brd->re_map_membase = ioremap(brd->membase, 0x1000); + + DPR_INIT(("remapped mem: 0x%p\n", brd->re_map_membase)); +} + + +/***************************************************************************** +* +* Function: +* +* dgnc_poll_handler +* +* Author: +* +* Scott H Kilau +* +* Parameters: +* +* dummy -- ignored +* +* Return Values: +* +* none +* +* Description: +* +* As each timer expires, it determines (a) whether the "transmit" +* waiter needs to be woken up, and (b) whether the poller needs to +* be rescheduled. +* +******************************************************************************/ + +static void dgnc_poll_handler(ulong dummy) +{ + struct board_t *brd; + unsigned long lock_flags; + int i; + unsigned long new_time; + + dgnc_poll_counter++; + + /* + * Do not start the board state machine until + * driver tells us its up and running, and has + * everything it needs. + */ + if (dgnc_driver_state != DRIVER_READY) { + goto schedule_poller; + } + + /* Go thru each board, kicking off a tasklet for each if needed */ + for (i = 0; i < dgnc_NumBoards; i++) { + brd = dgnc_Board[i]; + + DGNC_LOCK(brd->bd_lock, lock_flags); + + /* If board is in a failed state, don't bother scheduling a tasklet */ + if (brd->state == BOARD_FAILED) { + DGNC_UNLOCK(brd->bd_lock, lock_flags); + continue; + } + + /* Schedule a poll helper task */ + tasklet_schedule(&brd->helper_tasklet); + + DGNC_UNLOCK(brd->bd_lock, lock_flags); + } + +schedule_poller: + + /* + * Schedule ourself back at the nominal wakeup interval. + */ + DGNC_LOCK(dgnc_poll_lock, lock_flags); + dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick); + + new_time = dgnc_poll_time - jiffies; + + if ((ulong) new_time >= 2 * dgnc_poll_tick) { + dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick); + } + + init_timer(&dgnc_poll_timer); + dgnc_poll_timer.function = dgnc_poll_handler; + dgnc_poll_timer.data = 0; + dgnc_poll_timer.expires = dgnc_poll_time; + DGNC_UNLOCK(dgnc_poll_lock, lock_flags); + + if (!dgnc_poll_stop) + add_timer(&dgnc_poll_timer); +} + +/* + * dgnc_init_globals() + * + * This is where we initialize the globals from the static insmod + * configuration variables. These are declared near the head of + * this file. + */ +static void dgnc_init_globals(void) +{ + int i = 0; + + dgnc_rawreadok = rawreadok; + dgnc_trcbuf_size = trcbuf_size; + dgnc_debug = debug; + + for (i = 0; i < MAXBOARDS; i++) { + dgnc_Board[i] = NULL; + } + + init_timer(&dgnc_poll_timer); +} + + +/************************************************************************ + * + * Utility functions + * + ************************************************************************/ + + +/* + * dgnc_driver_kzmalloc() + * + * Malloc and clear memory, + */ +void *dgnc_driver_kzmalloc(size_t size, int priority) +{ + void *p = kmalloc(size, priority); + if(p) + memset(p, 0, size); + return(p); +} + + +/* + * dgnc_mbuf() + * + * Used to print to the message buffer during board init. + */ +static void dgnc_mbuf(struct board_t *brd, const char *fmt, ...) { + va_list ap; + char buf[1024]; + int i; + unsigned long flags; + + DGNC_LOCK(dgnc_global_lock, flags); + + /* Format buf using fmt and arguments contained in ap. */ + va_start(ap, fmt); + i = vsprintf(buf, fmt, ap); + va_end(ap); + + DPR((buf)); + + if (!brd || !brd->msgbuf) { + printk(buf); + DGNC_UNLOCK(dgnc_global_lock, flags); + return; + } + + memcpy(brd->msgbuf, buf, strlen(buf)); + brd->msgbuf += strlen(buf); + *brd->msgbuf = (char) NULL; + + DGNC_UNLOCK(dgnc_global_lock, flags); +} + + +/* + * dgnc_ms_sleep() + * + * Put the driver to sleep for x ms's + * + * Returns 0 if timed out, !0 (showing signal) if interrupted by a signal. + */ +int dgnc_ms_sleep(ulong ms) +{ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout((ms * HZ) / 1000); + return (signal_pending(current)); +} + + + +/* + * dgnc_ioctl_name() : Returns a text version of each ioctl value. + */ +char *dgnc_ioctl_name(int cmd) +{ + switch(cmd) { + + case TCGETA: return("TCGETA"); + case TCGETS: return("TCGETS"); + case TCSETA: return("TCSETA"); + case TCSETS: return("TCSETS"); + case TCSETAW: return("TCSETAW"); + case TCSETSW: return("TCSETSW"); + case TCSETAF: return("TCSETAF"); + case TCSETSF: return("TCSETSF"); + case TCSBRK: return("TCSBRK"); + case TCXONC: return("TCXONC"); + case TCFLSH: return("TCFLSH"); + case TIOCGSID: return("TIOCGSID"); + + case TIOCGETD: return("TIOCGETD"); + case TIOCSETD: return("TIOCSETD"); + case TIOCGWINSZ: return("TIOCGWINSZ"); + case TIOCSWINSZ: return("TIOCSWINSZ"); + + case TIOCMGET: return("TIOCMGET"); + case TIOCMSET: return("TIOCMSET"); + case TIOCMBIS: return("TIOCMBIS"); + case TIOCMBIC: return("TIOCMBIC"); + + /* from digi.h */ + case DIGI_SETA: return("DIGI_SETA"); + case DIGI_SETAW: return("DIGI_SETAW"); + case DIGI_SETAF: return("DIGI_SETAF"); + case DIGI_SETFLOW: return("DIGI_SETFLOW"); + case DIGI_SETAFLOW: return("DIGI_SETAFLOW"); + case DIGI_GETFLOW: return("DIGI_GETFLOW"); + case DIGI_GETAFLOW: return("DIGI_GETAFLOW"); + case DIGI_GETA: return("DIGI_GETA"); + case DIGI_GEDELAY: return("DIGI_GEDELAY"); + case DIGI_SEDELAY: return("DIGI_SEDELAY"); + case DIGI_GETCUSTOMBAUD: return("DIGI_GETCUSTOMBAUD"); + case DIGI_SETCUSTOMBAUD: return("DIGI_SETCUSTOMBAUD"); + case TIOCMODG: return("TIOCMODG"); + case TIOCMODS: return("TIOCMODS"); + case TIOCSDTR: return("TIOCSDTR"); + case TIOCCDTR: return("TIOCCDTR"); + + default: return("unknown"); + } +} diff --git a/drivers/staging/dgnc/dgnc_driver.h b/drivers/staging/dgnc/dgnc_driver.h new file mode 100644 index 0000000..43177f4 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_driver.h @@ -0,0 +1,566 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + ************************************************************************* + * + * Driver includes + * + *************************************************************************/ + +#ifndef __DGNC_DRIVER_H +#define __DGNC_DRIVER_H + +#include <linux/version.h> /* To get the current Linux version */ +#include <linux/types.h> /* To pick up the varions Linux types */ +#include <linux/tty.h> /* To pick up the various tty structs/defines */ +#include <linux/interrupt.h> /* For irqreturn_t type */ + +#include "dgnc_types.h" /* Additional types needed by the Digi header files */ +#include "digi.h" /* Digi specific ioctl header */ +#include "dgnc_kcompat.h" /* Kernel 2.4/2.6 compat includes */ +#include "dgnc_sysfs.h" /* Support for SYSFS */ + +/************************************************************************* + * + * Driver defines + * + *************************************************************************/ + +/* + * Driver identification, error and debugging statments + * + * In theory, you can change all occurances of "digi" in the next + * three lines, and the driver printk's will all automagically change. + * + * APR((fmt, args, ...)); Always prints message + * DPR((fmt, args, ...)); Only prints if DGNC_TRACER is defined at + * compile time and dgnc_debug!=0 + */ +#define PROCSTR "dgnc" /* /proc entries */ +#define DEVSTR "/dev/dg/dgnc" /* /dev entries */ +#define DRVSTR "dgnc" /* Driver name string + * displayed by APR */ +#define APR(args) do { PRINTF_TO_KMEM(args); printk(DRVSTR": "); printk args; \ + } while (0) +#define RAPR(args) do { PRINTF_TO_KMEM(args); printk args; } while (0) + +#define TRC_TO_CONSOLE 1 + +/* + * Debugging levels can be set using debug insmod variable + * They can also be compiled out completely. + */ + +#define DBG_INIT (dgnc_debug & 0x01) +#define DBG_BASIC (dgnc_debug & 0x02) +#define DBG_CORE (dgnc_debug & 0x04) + +#define DBG_OPEN (dgnc_debug & 0x08) +#define DBG_CLOSE (dgnc_debug & 0x10) +#define DBG_READ (dgnc_debug & 0x20) +#define DBG_WRITE (dgnc_debug & 0x40) + +#define DBG_IOCTL (dgnc_debug & 0x80) + +#define DBG_PROC (dgnc_debug & 0x100) +#define DBG_PARAM (dgnc_debug & 0x200) +#define DBG_PSCAN (dgnc_debug & 0x400) +#define DBG_EVENT (dgnc_debug & 0x800) + +#define DBG_DRAIN (dgnc_debug & 0x1000) +#define DBG_MSIGS (dgnc_debug & 0x2000) + +#define DBG_MGMT (dgnc_debug & 0x4000) +#define DBG_INTR (dgnc_debug & 0x8000) + +#define DBG_CARR (dgnc_debug & 0x10000) + + +#if defined(DGNC_TRACER) + +# if defined(TRC_TO_KMEM) +/* Choose one: */ +# define TRC_ON_OVERFLOW_WRAP_AROUND +# undef TRC_ON_OVERFLOW_SHIFT_BUFFER +# endif //TRC_TO_KMEM + +# define TRC_MAXMSG 1024 +# define TRC_OVERFLOW "(OVERFLOW)" +# define TRC_DTRC "/usr/bin/dtrc" + +#if defined TRC_TO_CONSOLE +#define PRINTF_TO_CONSOLE(args) { printk(DRVSTR": "); printk args; } +#else //!defined TRACE_TO_CONSOLE +#define PRINTF_TO_CONSOLE(args) +#endif + +#if defined TRC_TO_KMEM +#define PRINTF_TO_KMEM(args) dgnc_tracef args +#else //!defined TRC_TO_KMEM +#define PRINTF_TO_KMEM(args) +#endif + +#define TRC(args) { PRINTF_TO_KMEM(args); PRINTF_TO_CONSOLE(args) } + +# define DPR_INIT(ARGS) if (DBG_INIT) TRC(ARGS) +# define DPR_BASIC(ARGS) if (DBG_BASIC) TRC(ARGS) +# define DPR_CORE(ARGS) if (DBG_CORE) TRC(ARGS) +# define DPR_OPEN(ARGS) if (DBG_OPEN) TRC(ARGS) +# define DPR_CLOSE(ARGS) if (DBG_CLOSE) TRC(ARGS) +# define DPR_READ(ARGS) if (DBG_READ) TRC(ARGS) +# define DPR_WRITE(ARGS) if (DBG_WRITE) TRC(ARGS) +# define DPR_IOCTL(ARGS) if (DBG_IOCTL) TRC(ARGS) +# define DPR_PROC(ARGS) if (DBG_PROC) TRC(ARGS) +# define DPR_PARAM(ARGS) if (DBG_PARAM) TRC(ARGS) +# define DPR_PSCAN(ARGS) if (DBG_PSCAN) TRC(ARGS) +# define DPR_EVENT(ARGS) if (DBG_EVENT) TRC(ARGS) +# define DPR_DRAIN(ARGS) if (DBG_DRAIN) TRC(ARGS) +# define DPR_CARR(ARGS) if (DBG_CARR) TRC(ARGS) +# define DPR_MGMT(ARGS) if (DBG_MGMT) TRC(ARGS) +# define DPR_INTR(ARGS) if (DBG_INTR) TRC(ARGS) +# define DPR_MSIGS(ARGS) if (DBG_MSIGS) TRC(ARGS) + +# define DPR(ARGS) if (dgnc_debug) TRC(ARGS) +# define P(X) dgnc_tracef(#X "=%p\n", X) +# define X(X) dgnc_tracef(#X "=%x\n", X) + +#else//!defined DGNC_TRACER + +#define PRINTF_TO_KMEM(args) +# define TRC(ARGS) +# define DPR_INIT(ARGS) +# define DPR_BASIC(ARGS) +# define DPR_CORE(ARGS) +# define DPR_OPEN(ARGS) +# define DPR_CLOSE(ARGS) +# define DPR_READ(ARGS) +# define DPR_WRITE(ARGS) +# define DPR_IOCTL(ARGS) +# define DPR_PROC(ARGS) +# define DPR_PARAM(ARGS) +# define DPR_PSCAN(ARGS) +# define DPR_EVENT(ARGS) +# define DPR_DRAIN(ARGS) +# define DPR_CARR(ARGS) +# define DPR_MGMT(ARGS) +# define DPR_INTR(ARGS) +# define DPR_MSIGS(ARGS) + +# define DPR(args) + +#endif//DGNC_TRACER + +/* Number of boards we support at once. */ +#define MAXBOARDS 20 +#define MAXPORTS 8 +#define MAXTTYNAMELEN 200 + +/* Our 3 magic numbers for our board, channel and unit structs */ +#define DGNC_BOARD_MAGIC 0x5c6df104 +#define DGNC_CHANNEL_MAGIC 0x6c6df104 +#define DGNC_UNIT_MAGIC 0x7c6df104 + +/* Serial port types */ +#define DGNC_SERIAL 0 +#define DGNC_PRINT 1 + +#define SERIAL_TYPE_NORMAL 1 + +#define PORT_NUM(dev) ((dev) & 0x7f) +#define IS_PRINT(dev) (((dev) & 0xff) >= 0x80) + +/* MAX number of stop characters we will send when our read queue is getting full */ +#define MAX_STOPS_SENT 5 + +/* 4 extra for alignment play space */ +#define WRITEBUFLEN ((4096) + 4) +#define MYFLIPLEN N_TTY_BUF_SIZE + +#define dgnc_jiffies_from_ms(a) (((a) * HZ) / 1000) + +/* + * Define a local default termios struct. All ports will be created + * with this termios initially. This is the same structure that is defined + * as the default in tty_io.c with the same settings overriden as in serial.c + * + * In short, this should match the internal serial ports' defaults. + */ +#define DEFAULT_IFLAGS (ICRNL | IXON) +#define DEFAULT_OFLAGS (OPOST | ONLCR) +#define DEFAULT_CFLAGS (B9600 | CS8 | CREAD | HUPCL | CLOCAL) +#define DEFAULT_LFLAGS (ISIG | ICANON | ECHO | ECHOE | ECHOK | \ + ECHOCTL | ECHOKE | IEXTEN) + +#ifndef _POSIX_VDISABLE +#define _POSIX_VDISABLE '\0' +#endif + +#define SNIFF_MAX 65536 /* Sniff buffer size (2^n) */ +#define SNIFF_MASK (SNIFF_MAX - 1) /* Sniff wrap mask */ + +/* + * Lock function/defines. + * Makes spotting lock/unlock locations easier. + */ +# define DGNC_SPINLOCK_INIT(x) spin_lock_init(&(x)) +# define DGNC_LOCK(x,y) spin_lock_irqsave(&(x), y) +# define DGNC_UNLOCK(x,y) spin_unlock_irqrestore(&(x), y) + +/* + * All the possible states the driver can be while being loaded. + */ +enum { + DRIVER_INITIALIZED = 0, + DRIVER_READY +}; + +/* + * All the possible states the board can be while booting up. + */ +enum { + BOARD_FAILED = 0, + BOARD_FOUND, + BOARD_READY +}; + + +/************************************************************************* + * + * Structures and closely related defines. + * + *************************************************************************/ + +struct board_t; +struct channel_t; + +/************************************************************************ + * Per board operations structure * + ************************************************************************/ +struct board_ops { + void (*tasklet) (unsigned long data); + irqreturn_t (*intr) (int irq, void *voidbrd); + void (*uart_init) (struct channel_t *ch); + void (*uart_off) (struct channel_t *ch); + int (*drain) (struct tty_struct *tty, uint seconds); + void (*param) (struct tty_struct *tty); + void (*vpd) (struct board_t *brd); + void (*assert_modem_signals) (struct channel_t *ch); + void (*flush_uart_write) (struct channel_t *ch); + void (*flush_uart_read) (struct channel_t *ch); + void (*disable_receiver) (struct channel_t *ch); + void (*enable_receiver) (struct channel_t *ch); + void (*send_break) (struct channel_t *ch, int); + void (*send_start_character) (struct channel_t *ch); + void (*send_stop_character) (struct channel_t *ch); + void (*copy_data_from_queue_to_uart) (struct channel_t *ch); + uint (*get_uart_bytes_left) (struct channel_t *ch); + void (*send_immediate_char) (struct channel_t *ch, unsigned char); +}; + +/************************************************************************ + * Device flag definitions for bd_flags. + ************************************************************************/ +#define BD_IS_PCI_EXPRESS 0x0001 /* Is a PCI Express board */ + + +/* + * Per-board information + */ +struct board_t +{ + int magic; /* Board Magic number. */ + int boardnum; /* Board number: 0-32 */ + + int type; /* Type of board */ + char *name; /* Product Name */ + struct pci_dev *pdev; /* Pointer to the pci_dev struct */ + unsigned long bd_flags; /* Board flags */ + u16 vendor; /* PCI vendor ID */ + u16 device; /* PCI device ID */ + u16 subvendor; /* PCI subsystem vendor ID */ + u16 subdevice; /* PCI subsystem device ID */ + uchar rev; /* PCI revision ID */ + uint pci_bus; /* PCI bus value */ + uint pci_slot; /* PCI slot value */ + uint maxports; /* MAX ports this board can handle */ + uchar dvid; /* Board specific device id */ + uchar vpd[128]; /* VPD of board, if found */ + uchar serial_num[20]; /* Serial number of board, if found in VPD */ + + spinlock_t bd_lock; /* Used to protect board */ + + spinlock_t bd_intr_lock; /* Used to protect the poller tasklet and + * the interrupt routine from each other. + */ + + uint state; /* State of card. */ + wait_queue_head_t state_wait; /* Place to sleep on for state change */ + + struct tasklet_struct helper_tasklet; /* Poll helper tasklet */ + + uint nasync; /* Number of ports on card */ + + uint irq; /* Interrupt request number */ + ulong intr_count; /* Count of interrupts */ + ulong intr_modem; /* Count of interrupts */ + ulong intr_tx; /* Count of interrupts */ + ulong intr_rx; /* Count of interrupts */ + + ulong membase; /* Start of base memory of the card */ + ulong membase_end; /* End of base memory of the card */ + + uchar *re_map_membase;/* Remapped memory of the card */ + + ulong iobase; /* Start of io base of the card */ + ulong iobase_end; /* End of io base of the card */ + + uint bd_uart_offset; /* Space between each UART */ + + struct channel_t *channels[MAXPORTS]; /* array of pointers to our channels. */ + + struct tty_driver SerialDriver; + char SerialName[200]; + struct tty_driver PrintDriver; + char PrintName[200]; + + uint dgnc_Major_Serial_Registered; + uint dgnc_Major_TransparentPrint_Registered; + + uint dgnc_Serial_Major; + uint dgnc_TransparentPrint_Major; + + uint TtyRefCnt; + + char *flipbuf; /* Our flip buffer, alloced if board is found */ + + u16 dpatype; /* The board "type", as defined by DPA */ + u16 dpastatus; /* The board "status", as defined by DPA */ + + /* + * Mgmt data. + */ + char *msgbuf_head; + char *msgbuf; + + uint bd_dividend; /* Board/UARTs specific dividend */ + + struct board_ops *bd_ops; + + /* /proc/<board> entries */ + struct proc_dir_entry *proc_entry_pointer; + struct dgnc_proc_entry *dgnc_board_table; + +}; + + +/************************************************************************ + * Unit flag definitions for un_flags. + ************************************************************************/ +#define UN_ISOPEN 0x0001 /* Device is open */ +#define UN_CLOSING 0x0002 /* Line is being closed */ +#define UN_IMM 0x0004 /* Service immediately */ +#define UN_BUSY 0x0008 /* Some work this channel */ +#define UN_BREAKI 0x0010 /* Input break received */ +#define UN_PWAIT 0x0020 /* Printer waiting for terminal */ +#define UN_TIME 0x0040 /* Waiting on time */ +#define UN_EMPTY 0x0080 /* Waiting output queue empty */ +#define UN_LOW 0x0100 /* Waiting output low water mark*/ +#define UN_EXCL_OPEN 0x0200 /* Open for exclusive use */ +#define UN_WOPEN 0x0400 /* Device waiting for open */ +#define UN_WIOCTL 0x0800 /* Device waiting for open */ +#define UN_HANGUP 0x8000 /* Carrier lost */ + +struct device; + +/************************************************************************ + * Structure for terminal or printer unit. + ************************************************************************/ +struct un_t { + int magic; /* Unit Magic Number. */ + struct channel_t *un_ch; + ulong un_time; + uint un_type; + uint un_open_count; /* Counter of opens to port */ + struct tty_struct *un_tty;/* Pointer to unit tty structure */ + uint un_flags; /* Unit flags */ + wait_queue_head_t un_flags_wait; /* Place to sleep to wait on unit */ + uint un_dev; /* Minor device number */ + struct device *un_sysfs; +}; + + +/************************************************************************ + * Device flag definitions for ch_flags. + ************************************************************************/ +#define CH_PRON 0x0001 /* Printer on string */ +#define CH_STOP 0x0002 /* Output is stopped */ +#define CH_STOPI 0x0004 /* Input is stopped */ +#define CH_CD 0x0008 /* Carrier is present */ +#define CH_FCAR 0x0010 /* Carrier forced on */ +#define CH_HANGUP 0x0020 /* Hangup received */ + +#define CH_RECEIVER_OFF 0x0040 /* Receiver is off */ +#define CH_OPENING 0x0080 /* Port in fragile open state */ +#define CH_CLOSING 0x0100 /* Port in fragile close state */ +#define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */ +#define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */ +#define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */ +#define CH_BREAK_SENDING 0x1000 /* Break is being sent */ +#define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */ +#define CH_FLIPBUF_IN_USE 0x4000 /* Channel's flipbuf is in use */ +#define CH_BAUD0 0x08000 /* Used for checking B0 transitions */ +#define CH_FORCED_STOP 0x20000 /* Output is forcibly stopped */ +#define CH_FORCED_STOPI 0x40000 /* Input is forcibly stopped */ + +/* + * Definitions for ch_sniff_flags + */ +#define SNIFF_OPEN 0x1 +#define SNIFF_WAIT_DATA 0x2 +#define SNIFF_WAIT_SPACE 0x4 + + +/* Our Read/Error/Write queue sizes */ +#define RQUEUEMASK 0x1FFF /* 8 K - 1 */ +#define EQUEUEMASK 0x1FFF /* 8 K - 1 */ +#define WQUEUEMASK 0x0FFF /* 4 K - 1 */ +#define RQUEUESIZE (RQUEUEMASK + 1) +#define EQUEUESIZE RQUEUESIZE +#define WQUEUESIZE (WQUEUEMASK + 1) + + +/************************************************************************ + * Channel information structure. + ************************************************************************/ +struct channel_t { + int magic; /* Channel Magic Number */ + struct board_t *ch_bd; /* Board structure pointer */ + struct digi_t ch_digi; /* Transparent Print structure */ + struct un_t ch_tun; /* Terminal unit info */ + struct un_t ch_pun; /* Printer unit info */ + + spinlock_t ch_lock; /* provide for serialization */ + wait_queue_head_t ch_flags_wait; + + uint ch_portnum; /* Port number, 0 offset. */ + uint ch_open_count; /* open count */ + uint ch_flags; /* Channel flags */ + + ulong ch_close_delay; /* How long we should drop RTS/DTR for */ + + ulong ch_cpstime; /* Time for CPS calculations */ + + tcflag_t ch_c_iflag; /* channel iflags */ + tcflag_t ch_c_cflag; /* channel cflags */ + tcflag_t ch_c_oflag; /* channel oflags */ + tcflag_t ch_c_lflag; /* channel lflags */ + uchar ch_stopc; /* Stop character */ + uchar ch_startc; /* Start character */ + + uint ch_old_baud; /* Cache of the current baud */ + uint ch_custom_speed;/* Custom baud, if set */ + + uint ch_wopen; /* Waiting for open process cnt */ + + uchar ch_mostat; /* FEP output modem status */ + uchar ch_mistat; /* FEP input modem status */ + + struct neo_uart_struct *ch_neo_uart; /* Pointer to the "mapped" UART struct */ + struct cls_uart_struct *ch_cls_uart; /* Pointer to the "mapped" UART struct */ + + uchar ch_cached_lsr; /* Cached value of the LSR register */ + + uchar *ch_rqueue; /* Our read queue buffer - malloc'ed */ + ushort ch_r_head; /* Head location of the read queue */ + ushort ch_r_tail; /* Tail location of the read queue */ + + uchar *ch_equeue; /* Our error queue buffer - malloc'ed */ + ushort ch_e_head; /* Head location of the error queue */ + ushort ch_e_tail; /* Tail location of the error queue */ + + uchar *ch_wqueue; /* Our write queue buffer - malloc'ed */ + ushort ch_w_head; /* Head location of the write queue */ + ushort ch_w_tail; /* Tail location of the write queue */ + + ulong ch_rxcount; /* total of data received so far */ + ulong ch_txcount; /* total of data transmitted so far */ + + uchar ch_r_tlevel; /* Receive Trigger level */ + uchar ch_t_tlevel; /* Transmit Trigger level */ + + uchar ch_r_watermark; /* Receive Watermark */ + + ulong ch_stop_sending_break; /* Time we should STOP sending a break */ + + uint ch_stops_sent; /* How many times I have sent a stop character + * to try to stop the other guy sending. + */ + ulong ch_err_parity; /* Count of parity errors on channel */ + ulong ch_err_frame; /* Count of framing errors on channel */ + ulong ch_err_break; /* Count of breaks on channel */ + ulong ch_err_overrun; /* Count of overruns on channel */ + + ulong ch_xon_sends; /* Count of xons transmitted */ + ulong ch_xoff_sends; /* Count of xoffs transmitted */ + + ulong ch_intr_modem; /* Count of interrupts */ + ulong ch_intr_tx; /* Count of interrupts */ + ulong ch_intr_rx; /* Count of interrupts */ + + + /* /proc/<board>/<channel> entries */ + struct proc_dir_entry *proc_entry_pointer; + struct dgnc_proc_entry *dgnc_channel_table; + + uint ch_sniff_in; + uint ch_sniff_out; + char *ch_sniff_buf; /* Sniff buffer for proc */ + ulong ch_sniff_flags; /* Channel flags */ + wait_queue_head_t ch_sniff_wait; +}; + + +/************************************************************************* + * + * Prototypes for non-static functions used in more than one module + * + *************************************************************************/ + +extern int dgnc_ms_sleep(ulong ms); +extern void *dgnc_driver_kzmalloc(size_t size, int priority); +extern char *dgnc_ioctl_name(int cmd); + +/* + * Our Global Variables. + */ +extern int dgnc_driver_state; /* The state of the driver */ +extern uint dgnc_Major; /* Our driver/mgmt major */ +extern int dgnc_debug; /* Debug variable */ +extern int dgnc_rawreadok; /* Set if user wants rawreads */ +extern int dgnc_poll_tick; /* Poll interval - 20 ms */ +extern int dgnc_trcbuf_size; /* Size of the ringbuffer */ +extern spinlock_t dgnc_global_lock; /* Driver global spinlock */ +extern uint dgnc_NumBoards; /* Total number of boards */ +extern struct board_t *dgnc_Board[MAXBOARDS]; /* Array of board structs */ +extern ulong dgnc_poll_counter; /* Times the poller has run */ +extern char *dgnc_state_text[]; /* Array of state text */ +extern char *dgnc_driver_state_text[];/* Array of driver state text */ + +#endif diff --git a/drivers/staging/dgnc/dgnc_kcompat.h b/drivers/staging/dgnc/dgnc_kcompat.h new file mode 100644 index 0000000..3f69e1d --- /dev/null +++ b/drivers/staging/dgnc/dgnc_kcompat.h @@ -0,0 +1,91 @@ +/* + * Copyright 2004 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + ************************************************************************* + * + * This file is intended to contain all the kernel "differences" between the + * various kernels that we support. + * + *************************************************************************/ + +#ifndef __DGNC_KCOMPAT_H +#define __DGNC_KCOMPAT_H + +# ifndef KERNEL_VERSION +# define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) +# endif + + +#if !defined(TTY_FLIPBUF_SIZE) +# define TTY_FLIPBUF_SIZE 512 +#endif + + +/* Sparse stuff */ +# ifndef __user +# define __user +# define __kernel +# define __safe +# define __force +# define __chk_user_ptr(x) (void)0 +# endif + + +# define PARM_STR(VAR, INIT, PERM, DESC) \ + static char *VAR = INIT; \ + char *dgnc_##VAR; \ + module_param(VAR, charp, PERM); \ + MODULE_PARM_DESC(VAR, DESC); + +# define PARM_INT(VAR, INIT, PERM, DESC) \ + static int VAR = INIT; \ + int dgnc_##VAR; \ + module_param(VAR, int, PERM); \ + MODULE_PARM_DESC(VAR, DESC); + +# define PARM_ULONG(VAR, INIT, PERM, DESC) \ + static ulong VAR = INIT; \ + ulong dgnc_##VAR; \ + module_param(VAR, long, PERM); \ + MODULE_PARM_DESC(VAR, DESC); + + + + + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) + + + +/* NOTHING YET */ + + + +# else + + + +# error "this driver does not support anything below the 2.6.27 kernel series." + + + +# endif + +#endif /* ! __DGNC_KCOMPAT_H */ diff --git a/drivers/staging/dgnc/dgnc_mgmt.c b/drivers/staging/dgnc/dgnc_mgmt.c new file mode 100644 index 0000000..b8e4792 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_mgmt.c @@ -0,0 +1,313 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + */ + +/************************************************************************ + * + * This file implements the mgmt functionality for the + * Neo and ClassicBoard based product lines. + * + ************************************************************************ + * $Id: dgnc_mgmt.c,v 1.2 2010/12/14 20:08:29 markh Exp $ + */ +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/ctype.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/serial_reg.h> +#include <linux/termios.h> +#include <asm/uaccess.h> /* For copy_from_user/copy_to_user */ + +#include "dgnc_driver.h" +#include "dgnc_pci.h" +#include "dgnc_proc.h" +#include "dgnc_kcompat.h" /* Kernel 2.4/2.6 compat includes */ +#include "dgnc_mgmt.h" +#include "dpacompat.h" + + +/* Our "in use" variables, to enforce 1 open only */ +static int dgnc_mgmt_in_use[MAXMGMTDEVICES]; + + +/* + * dgnc_mgmt_open() + * + * Open the mgmt/downld/dpa device + */ +int dgnc_mgmt_open(struct inode *inode, struct file *file) +{ + unsigned long lock_flags; + unsigned int minor = iminor(inode); + + DPR_MGMT(("dgnc_mgmt_open start.\n")); + + DGNC_LOCK(dgnc_global_lock, lock_flags); + + /* mgmt device */ + if (minor < MAXMGMTDEVICES) { + /* Only allow 1 open at a time on mgmt device */ + if (dgnc_mgmt_in_use[minor]) { + DGNC_UNLOCK(dgnc_global_lock, lock_flags); + return (-EBUSY); + } + dgnc_mgmt_in_use[minor]++; + } + else { + DGNC_UNLOCK(dgnc_global_lock, lock_flags); + return (-ENXIO); + } + + DGNC_UNLOCK(dgnc_global_lock, lock_flags); + + DPR_MGMT(("dgnc_mgmt_open finish.\n")); + + return 0; +} + + +/* + * dgnc_mgmt_close() + * + * Open the mgmt/dpa device + */ +int dgnc_mgmt_close(struct inode *inode, struct file *file) +{ + unsigned long lock_flags; + unsigned int minor = iminor(inode); + + DPR_MGMT(("dgnc_mgmt_close start.\n")); + + DGNC_LOCK(dgnc_global_lock, lock_flags); + + /* mgmt device */ + if (minor < MAXMGMTDEVICES) { + if (dgnc_mgmt_in_use[minor]) { + dgnc_mgmt_in_use[minor] = 0; + } + } + DGNC_UNLOCK(dgnc_global_lock, lock_flags); + + DPR_MGMT(("dgnc_mgmt_close finish.\n")); + + return 0; +} + + +/* + * dgnc_mgmt_ioctl() + * + * ioctl the mgmt/dpa device + */ +#ifdef HAVE_UNLOCKED_IOCTL +long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + struct inode *inode = file->f_dentry->d_inode; +#else +int dgnc_mgmt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ +#endif + unsigned long lock_flags; + void __user *uarg = (void __user *) arg; + + DPR_MGMT(("dgnc_mgmt_ioctl start.\n")); + + switch (cmd) { + + case DIGI_GETDD: + { + /* + * This returns the total number of boards + * in the system, as well as driver version + * and has space for a reserved entry + */ + struct digi_dinfo ddi; + + DGNC_LOCK(dgnc_global_lock, lock_flags); + + ddi.dinfo_nboards = dgnc_NumBoards; + sprintf(ddi.dinfo_version, "%s", DG_PART); + + DGNC_UNLOCK(dgnc_global_lock, lock_flags); + + DPR_MGMT(("DIGI_GETDD returning numboards: %d version: %s\n", + ddi.dinfo_nboards, ddi.dinfo_version)); + + if (copy_to_user(uarg, &ddi, sizeof (ddi))) + return(-EFAULT); + + break; + } + + case DIGI_GETBD: + { + int brd; + + struct digi_info di; + + if (copy_from_user(&brd, uarg, sizeof(int))) { + return(-EFAULT); + } + + DPR_MGMT(("DIGI_GETBD asking about board: %d\n", brd)); + + if ((brd < 0) || (brd > dgnc_NumBoards) || (dgnc_NumBoards == 0)) + return (-ENODEV); + + memset(&di, 0, sizeof(di)); + + di.info_bdnum = brd; + + DGNC_LOCK(dgnc_Board[brd]->bd_lock, lock_flags); + + di.info_bdtype = dgnc_Board[brd]->dpatype; + di.info_bdstate = dgnc_Board[brd]->dpastatus; + di.info_ioport = 0; + di.info_physaddr = (ulong) dgnc_Board[brd]->membase; + di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end; + if (dgnc_Board[brd]->state != BOARD_FAILED) + di.info_nports = dgnc_Board[brd]->nasync; + else + di.info_nports = 0; + + DGNC_UNLOCK(dgnc_Board[brd]->bd_lock, lock_flags); + + DPR_MGMT(("DIGI_GETBD returning type: %x state: %x ports: %x size: %x\n", + di.info_bdtype, di.info_bdstate, di.info_nports, di.info_physsize)); + + if (copy_to_user(uarg, &di, sizeof (di))) + return (-EFAULT); + + break; + } + + case DIGI_GET_NI_INFO: + { + struct channel_t *ch; + struct ni_info ni; + uchar mstat = 0; + uint board = 0; + uint channel = 0; + + if (copy_from_user(&ni, uarg, sizeof(struct ni_info))) { + return(-EFAULT); + } + + DPR_MGMT(("DIGI_GETBD asking about board: %d channel: %d\n", + ni.board, ni.channel)); + + board = ni.board; + channel = ni.channel; + + /* Verify boundaries on board */ + if ((board < 0) || (board > dgnc_NumBoards) || (dgnc_NumBoards == 0)) + return (-ENODEV); + + /* Verify boundaries on channel */ + if ((channel < 0) || (channel > dgnc_Board[board]->nasync)) + return (-ENODEV); + + ch = dgnc_Board[board]->channels[channel]; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (-ENODEV); + + memset(&ni, 0, sizeof(ni)); + ni.board = board; + ni.channel = channel; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + mstat = (ch->ch_mostat | ch->ch_mistat); + + if (mstat & UART_MCR_DTR) { + ni.mstat |= TIOCM_DTR; + ni.dtr = TIOCM_DTR; + } + if (mstat & UART_MCR_RTS) { + ni.mstat |= TIOCM_RTS; + ni.rts = TIOCM_RTS; + } + if (mstat & UART_MSR_CTS) { + ni.mstat |= TIOCM_CTS; + ni.cts = TIOCM_CTS; + } + if (mstat & UART_MSR_RI) { + ni.mstat |= TIOCM_RI; + ni.ri = TIOCM_RI; + } + if (mstat & UART_MSR_DCD) { + ni.mstat |= TIOCM_CD; + ni.dcd = TIOCM_CD; + } + if (mstat & UART_MSR_DSR) + ni.mstat |= TIOCM_DSR; + + ni.iflag = ch->ch_c_iflag; + ni.oflag = ch->ch_c_oflag; + ni.cflag = ch->ch_c_cflag; + ni.lflag = ch->ch_c_lflag; + + if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) + ni.hflow = 1; + else + ni.hflow = 0; + + if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI)) + ni.recv_stopped = 1; + else + ni.recv_stopped = 0; + + if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP)) + ni.xmit_stopped = 1; + else + ni.xmit_stopped = 0; + + ni.curtx = ch->ch_txcount; + ni.currx = ch->ch_rxcount; + + ni.baud = ch->ch_old_baud; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (copy_to_user(uarg, &ni, sizeof(ni))) + return (-EFAULT); + + break; + } + + + } + + DPR_MGMT(("dgnc_mgmt_ioctl finish.\n")); + + return 0; +} diff --git a/drivers/staging/dgnc/dgnc_mgmt.h b/drivers/staging/dgnc/dgnc_mgmt.h new file mode 100644 index 0000000..a0d1338 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_mgmt.h @@ -0,0 +1,37 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +#ifndef __DGNC_MGMT_H +#define __DGNC_MGMT_H + +#define MAXMGMTDEVICES 8 + +int dgnc_mgmt_open(struct inode *inode, struct file *file); +int dgnc_mgmt_close(struct inode *inode, struct file *file); + +#ifdef HAVE_UNLOCKED_IOCTL +long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg); +#else +int dgnc_mgmt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); +#endif + +#endif + diff --git a/drivers/staging/dgnc/dgnc_neo.c b/drivers/staging/dgnc/dgnc_neo.c new file mode 100644 index 0000000..503db8f --- /dev/null +++ b/drivers/staging/dgnc/dgnc_neo.c @@ -0,0 +1,1977 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + * + * $Id: dgnc_neo.c,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + */ + + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/delay.h> /* For udelay */ +#include <asm/io.h> /* For read[bwl]/write[bwl] */ +#include <linux/serial.h> /* For struct async_serial */ +#include <linux/serial_reg.h> /* For the various UART offsets */ + +#include "dgnc_driver.h" /* Driver main header file */ +#include "dgnc_neo.h" /* Our header file */ +#include "dgnc_tty.h" +#include "dgnc_trace.h" + +static inline void neo_parse_lsr(struct board_t *brd, uint port); +static inline void neo_parse_isr(struct board_t *brd, uint port); +static void neo_copy_data_from_uart_to_queue(struct channel_t *ch); +static inline void neo_clear_break(struct channel_t *ch, int force); +static inline void neo_set_cts_flow_control(struct channel_t *ch); +static inline void neo_set_rts_flow_control(struct channel_t *ch); +static inline void neo_set_ixon_flow_control(struct channel_t *ch); +static inline void neo_set_ixoff_flow_control(struct channel_t *ch); +static inline void neo_set_no_output_flow_control(struct channel_t *ch); +static inline void neo_set_no_input_flow_control(struct channel_t *ch); +static inline void neo_set_new_start_stop_chars(struct channel_t *ch); +static void neo_parse_modem(struct channel_t *ch, uchar signals); +static void neo_tasklet(unsigned long data); +static void neo_vpd(struct board_t *brd); +static void neo_uart_init(struct channel_t *ch); +static void neo_uart_off(struct channel_t *ch); +static int neo_drain(struct tty_struct *tty, uint seconds); +static void neo_param(struct tty_struct *tty); +static void neo_assert_modem_signals(struct channel_t *ch); +static void neo_flush_uart_write(struct channel_t *ch); +static void neo_flush_uart_read(struct channel_t *ch); +static void neo_disable_receiver(struct channel_t *ch); +static void neo_enable_receiver(struct channel_t *ch); +static void neo_send_break(struct channel_t *ch, int msecs); +static void neo_send_start_character(struct channel_t *ch); +static void neo_send_stop_character(struct channel_t *ch); +static void neo_copy_data_from_queue_to_uart(struct channel_t *ch); +static uint neo_get_uart_bytes_left(struct channel_t *ch); +static void neo_send_immediate_char(struct channel_t *ch, unsigned char c); +static irqreturn_t neo_intr(int irq, void *voidbrd); + + +struct board_ops dgnc_neo_ops = { + .tasklet = neo_tasklet, + .intr = neo_intr, + .uart_init = neo_uart_init, + .uart_off = neo_uart_off, + .drain = neo_drain, + .param = neo_param, + .vpd = neo_vpd, + .assert_modem_signals = neo_assert_modem_signals, + .flush_uart_write = neo_flush_uart_write, + .flush_uart_read = neo_flush_uart_read, + .disable_receiver = neo_disable_receiver, + .enable_receiver = neo_enable_receiver, + .send_break = neo_send_break, + .send_start_character = neo_send_start_character, + .send_stop_character = neo_send_stop_character, + .copy_data_from_queue_to_uart = neo_copy_data_from_queue_to_uart, + .get_uart_bytes_left = neo_get_uart_bytes_left, + .send_immediate_char = neo_send_immediate_char +}; + +static uint dgnc_offset_table[8] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; + + +/* + * This function allows calls to ensure that all outstanding + * PCI writes have been completed, by doing a PCI read against + * a non-destructive, read-only location on the Neo card. + * + * In this case, we are reading the DVID (Read-only Device Identification) + * value of the Neo card. + */ +static inline void neo_pci_posting_flush(struct board_t *bd) +{ + readb(bd->re_map_membase + 0x8D); +} + +static inline void neo_set_cts_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + + DPR_PARAM(("Setting CTSFLOW\n")); + + /* Turn on auto CTS flow control */ +#if 1 + ier |= (UART_17158_IER_CTSDSR); +#else + ier &= ~(UART_17158_IER_CTSDSR); +#endif + + efr |= (UART_17158_EFR_ECB | UART_17158_EFR_CTSDSR); + + /* Turn off auto Xon flow control */ + efr &= ~(UART_17158_EFR_IXON); + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + /* Turn on table D, with 8 char hi/low watermarks */ + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); + + /* Feed the UART our trigger levels */ + writeb(8, &ch->ch_neo_uart->tfifo); + ch->ch_t_tlevel = 8; + + writeb(ier, &ch->ch_neo_uart->ier); + + neo_pci_posting_flush(ch->ch_bd); +} + + +static inline void neo_set_rts_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + DPR_PARAM(("Setting RTSFLOW\n")); + + /* Turn on auto RTS flow control */ +#if 1 + ier |= (UART_17158_IER_RTSDTR); +#else + ier &= ~(UART_17158_IER_RTSDTR); +#endif + efr |= (UART_17158_EFR_ECB | UART_17158_EFR_RTSDTR); + + /* Turn off auto Xoff flow control */ + ier &= ~(UART_17158_IER_XOFF); + efr &= ~(UART_17158_EFR_IXOFF); + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); + ch->ch_r_watermark = 4; + + writeb(32, &ch->ch_neo_uart->rfifo); + ch->ch_r_tlevel = 32; + + writeb(ier, &ch->ch_neo_uart->ier); + + /* + * From the Neo UART spec sheet: + * The auto RTS/DTR function must be started by asserting + * RTS/DTR# output pin (MCR bit-0 or 1 to logic 1 after + * it is enabled. + */ + ch->ch_mostat |= (UART_MCR_RTS); + + neo_pci_posting_flush(ch->ch_bd); +} + + +static inline void neo_set_ixon_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + DPR_PARAM(("Setting IXON FLOW\n")); + + /* Turn off auto CTS flow control */ + ier &= ~(UART_17158_IER_CTSDSR); + efr &= ~(UART_17158_EFR_CTSDSR); + + /* Turn on auto Xon flow control */ + efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXON); + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); + ch->ch_r_watermark = 4; + + writeb(32, &ch->ch_neo_uart->rfifo); + ch->ch_r_tlevel = 32; + + /* Tell UART what start/stop chars it should be looking for */ + writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); + writeb(0, &ch->ch_neo_uart->xonchar2); + + writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); + writeb(0, &ch->ch_neo_uart->xoffchar2); + + writeb(ier, &ch->ch_neo_uart->ier); + + neo_pci_posting_flush(ch->ch_bd); +} + + +static inline void neo_set_ixoff_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + DPR_PARAM(("Setting IXOFF FLOW\n")); + + /* Turn off auto RTS flow control */ + ier &= ~(UART_17158_IER_RTSDTR); + efr &= ~(UART_17158_EFR_RTSDTR); + + /* Turn on auto Xoff flow control */ + ier |= (UART_17158_IER_XOFF); + efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + /* Turn on table D, with 8 char hi/low watermarks */ + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); + + writeb(8, &ch->ch_neo_uart->tfifo); + ch->ch_t_tlevel = 8; + + /* Tell UART what start/stop chars it should be looking for */ + writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); + writeb(0, &ch->ch_neo_uart->xonchar2); + + writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); + writeb(0, &ch->ch_neo_uart->xoffchar2); + + writeb(ier, &ch->ch_neo_uart->ier); + + neo_pci_posting_flush(ch->ch_bd); +} + + +static inline void neo_set_no_input_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + DPR_PARAM(("Unsetting Input FLOW\n")); + + /* Turn off auto RTS flow control */ + ier &= ~(UART_17158_IER_RTSDTR); + efr &= ~(UART_17158_EFR_RTSDTR); + + /* Turn off auto Xoff flow control */ + ier &= ~(UART_17158_IER_XOFF); + if (ch->ch_c_iflag & IXON) + efr &= ~(UART_17158_EFR_IXOFF); + else + efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); + + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + /* Turn on table D, with 8 char hi/low watermarks */ + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); + + ch->ch_r_watermark = 0; + + writeb(16, &ch->ch_neo_uart->tfifo); + ch->ch_t_tlevel = 16; + + writeb(16, &ch->ch_neo_uart->rfifo); + ch->ch_r_tlevel = 16; + + writeb(ier, &ch->ch_neo_uart->ier); + + neo_pci_posting_flush(ch->ch_bd); +} + + +static inline void neo_set_no_output_flow_control(struct channel_t *ch) +{ + uchar ier = readb(&ch->ch_neo_uart->ier); + uchar efr = readb(&ch->ch_neo_uart->efr); + + DPR_PARAM(("Unsetting Output FLOW\n")); + + /* Turn off auto CTS flow control */ + ier &= ~(UART_17158_IER_CTSDSR); + efr &= ~(UART_17158_EFR_CTSDSR); + + /* Turn off auto Xon flow control */ + if (ch->ch_c_iflag & IXOFF) + efr &= ~(UART_17158_EFR_IXON); + else + efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXON); + + /* Why? Becuz Exar's spec says we have to zero it out before setting it */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Turn on UART enhanced bits */ + writeb(efr, &ch->ch_neo_uart->efr); + + /* Turn on table D, with 8 char hi/low watermarks */ + writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); + + ch->ch_r_watermark = 0; + + writeb(16, &ch->ch_neo_uart->tfifo); + ch->ch_t_tlevel = 16; + + writeb(16, &ch->ch_neo_uart->rfifo); + ch->ch_r_tlevel = 16; + + writeb(ier, &ch->ch_neo_uart->ier); + + neo_pci_posting_flush(ch->ch_bd); +} + + +/* change UARTs start/stop chars */ +static inline void neo_set_new_start_stop_chars(struct channel_t *ch) +{ + + /* if hardware flow control is set, then skip this whole thing */ + if (ch->ch_digi.digi_flags & (CTSPACE | RTSPACE) || ch->ch_c_cflag & CRTSCTS) + return; + + DPR_PARAM(("In new start stop chars\n")); + + /* Tell UART what start/stop chars it should be looking for */ + writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); + writeb(0, &ch->ch_neo_uart->xonchar2); + + writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); + writeb(0, &ch->ch_neo_uart->xoffchar2); + + neo_pci_posting_flush(ch->ch_bd); +} + + +/* + * No locks are assumed to be held when calling this function. + */ +static inline void neo_clear_break(struct channel_t *ch, int force) +{ + ulong lock_flags; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Bail if we aren't currently sending a break. */ + if (!ch->ch_stop_sending_break) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* Turn break off, and unset some variables */ + if (ch->ch_flags & CH_BREAK_SENDING) { + if ((jiffies >= ch->ch_stop_sending_break) || force) { + uchar temp = readb(&ch->ch_neo_uart->lcr); + writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr); + neo_pci_posting_flush(ch->ch_bd); + ch->ch_flags &= ~(CH_BREAK_SENDING); + ch->ch_stop_sending_break = 0; + DPR_IOCTL(("Finishing UART_LCR_SBC! finished: %lx\n", jiffies)); + } + } + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +/* + * Parse the ISR register. + */ +static inline void neo_parse_isr(struct board_t *brd, uint port) +{ + struct channel_t *ch; + uchar isr; + uchar cause; + ulong lock_flags; + + if (!brd || brd->magic != DGNC_BOARD_MAGIC) + return; + + if (port > brd->maxports) + return; + + ch = brd->channels[port]; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + /* Here we try to figure out what caused the interrupt to happen */ + while (1) { + + isr = readb(&ch->ch_neo_uart->isr_fcr); + + /* Bail if no pending interrupt */ + if (isr & UART_IIR_NO_INT) { + break; + } + + /* + * Yank off the upper 2 bits, which just show that the FIFO's are enabled. + */ + isr &= ~(UART_17158_IIR_FIFO_ENABLED); + + DPR_INTR(("%s:%d isr: %x\n", __FILE__, __LINE__, isr)); + + if (isr & (UART_17158_IIR_RDI_TIMEOUT | UART_IIR_RDI)) { + /* Read data from uart -> queue */ + brd->intr_rx++; + ch->ch_intr_rx++; + neo_copy_data_from_uart_to_queue(ch); + + /* Call our tty layer to enforce queue flow control if needed. */ + DGNC_LOCK(ch->ch_lock, lock_flags); + dgnc_check_queue_flow_control(ch); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + + if (isr & UART_IIR_THRI) { + brd->intr_tx++; + ch->ch_intr_tx++; + /* Transfer data (if any) from Write Queue -> UART. */ + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + neo_copy_data_from_queue_to_uart(ch); + } + + if (isr & UART_17158_IIR_XONXOFF) { + cause = readb(&ch->ch_neo_uart->xoffchar1); + + DPR_INTR(("Port %d. Got ISR_XONXOFF: cause:%x\n", port, cause)); + + /* + * Since the UART detected either an XON or + * XOFF match, we need to figure out which + * one it was, so we can suspend or resume data flow. + */ + if (cause == UART_17158_XON_DETECT) { + /* Is output stopped right now, if so, resume it */ + if (brd->channels[port]->ch_flags & CH_STOP) { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags &= ~(CH_STOP); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + DPR_INTR(("Port %d. XON detected in incoming data\n", port)); + } + else if (cause == UART_17158_XOFF_DETECT) { + if (!(brd->channels[port]->ch_flags & CH_STOP)) { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags |= CH_STOP; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + DPR_INTR(("Setting CH_STOP\n")); + } + DPR_INTR(("Port: %d. XOFF detected in incoming data\n", port)); + } + } + + if (isr & UART_17158_IIR_HWFLOW_STATE_CHANGE) { + /* + * If we get here, this means the hardware is doing auto flow control. + * Check to see whether RTS/DTR or CTS/DSR caused this interrupt. + */ + brd->intr_modem++; + ch->ch_intr_modem++; + cause = readb(&ch->ch_neo_uart->mcr); + /* Which pin is doing auto flow? RTS or DTR? */ + if ((cause & 0x4) == 0) { + if (cause & UART_MCR_RTS) { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_mostat |= UART_MCR_RTS; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + else { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_mostat &= ~(UART_MCR_RTS); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + } else { + if (cause & UART_MCR_DTR) { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_mostat |= UART_MCR_DTR; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + else { + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_mostat &= ~(UART_MCR_DTR); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + } + } + + /* Parse any modem signal changes */ + DPR_INTR(("MOD_STAT: sending to parse_modem_sigs\n")); + neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); + } +} + + +static inline void neo_parse_lsr(struct board_t *brd, uint port) +{ + struct channel_t *ch; + int linestatus; + ulong lock_flags; + + if (!brd) + return; + + if (brd->magic != DGNC_BOARD_MAGIC) + return; + + if (port > brd->maxports) + return; + + ch = brd->channels[port]; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + linestatus = readb(&ch->ch_neo_uart->lsr); + + DPR_INTR(("%s:%d port: %d linestatus: %x\n", __FILE__, __LINE__, port, linestatus)); + + ch->ch_cached_lsr |= linestatus; + + if (ch->ch_cached_lsr & UART_LSR_DR) { + brd->intr_rx++; + ch->ch_intr_rx++; + /* Read data from uart -> queue */ + neo_copy_data_from_uart_to_queue(ch); + DGNC_LOCK(ch->ch_lock, lock_flags); + dgnc_check_queue_flow_control(ch); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + + /* + * This is a special flag. It indicates that at least 1 + * RX error (parity, framing, or break) has happened. + * Mark this in our struct, which will tell me that I have + *to do the special RX+LSR read for this FIFO load. + */ + if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) { + DPR_INTR(("%s:%d Port: %d Got an RX error, need to parse LSR\n", + __FILE__, __LINE__, port)); + } + + /* + * The next 3 tests should *NOT* happen, as the above test + * should encapsulate all 3... At least, thats what Exar says. + */ + + if (linestatus & UART_LSR_PE) { + ch->ch_err_parity++; + DPR_INTR(("%s:%d Port: %d. PAR ERR!\n", __FILE__, __LINE__, port)); + } + + if (linestatus & UART_LSR_FE) { + ch->ch_err_frame++; + DPR_INTR(("%s:%d Port: %d. FRM ERR!\n", __FILE__, __LINE__, port)); + } + + if (linestatus & UART_LSR_BI) { + ch->ch_err_break++; + DPR_INTR(("%s:%d Port: %d. BRK INTR!\n", __FILE__, __LINE__, port)); + } + + if (linestatus & UART_LSR_OE) { + /* + * Rx Oruns. Exar says that an orun will NOT corrupt + * the FIFO. It will just replace the holding register + * with this new data byte. So basically just ignore this. + * Probably we should eventually have an orun stat in our driver... + */ + ch->ch_err_overrun++; + DPR_INTR(("%s:%d Port: %d. Rx Overrun!\n", __FILE__, __LINE__, port)); + } + + if (linestatus & UART_LSR_THRE) { + brd->intr_tx++; + ch->ch_intr_tx++; + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* Transfer data (if any) from Write Queue -> UART. */ + neo_copy_data_from_queue_to_uart(ch); + } + else if (linestatus & UART_17158_TX_AND_FIFO_CLR) { + brd->intr_tx++; + ch->ch_intr_tx++; + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* Transfer data (if any) from Write Queue -> UART. */ + neo_copy_data_from_queue_to_uart(ch); + } +} + + +/* + * neo_param() + * Send any/all changes to the line to the UART. + */ +static void neo_param(struct tty_struct *tty) +{ + uchar lcr = 0; + uchar uart_lcr = 0; + uchar ier = 0; + uchar uart_ier = 0; + uint baud = 9600; + int quot = 0; + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!tty || tty->magic != TTY_MAGIC) { + return; + } + + un = (struct un_t *) tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) { + return; + } + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) { + return; + } + + DPR_PARAM(("param start: tdev: %x cflags: %x oflags: %x iflags: %x\n", + ch->ch_tun.un_dev, ch->ch_c_cflag, ch->ch_c_oflag, ch->ch_c_iflag)); + + /* + * If baud rate is zero, flush queues, and set mval to drop DTR. + */ + if ((ch->ch_c_cflag & (CBAUD)) == 0) { + ch->ch_r_head = ch->ch_r_tail = 0; + ch->ch_e_head = ch->ch_e_tail = 0; + ch->ch_w_head = ch->ch_w_tail = 0; + + neo_flush_uart_write(ch); + neo_flush_uart_read(ch); + + /* The baudrate is B0 so all modem lines are to be dropped. */ + ch->ch_flags |= (CH_BAUD0); + ch->ch_mostat &= ~(UART_MCR_RTS | UART_MCR_DTR); + neo_assert_modem_signals(ch); + ch->ch_old_baud = 0; + return; + + } else if (ch->ch_custom_speed) { + + baud = ch->ch_custom_speed; + /* Handle transition from B0 */ + if (ch->ch_flags & CH_BAUD0) { + ch->ch_flags &= ~(CH_BAUD0); + + /* + * Bring back up RTS and DTR... + * Also handle RTS or DTR toggle if set. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + } + } else { + int iindex = 0; + int jindex = 0; + + ulong bauds[4][16] = { + { /* slowbaud */ + 0, 50, 75, 110, + 134, 150, 200, 300, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* slowbaud & CBAUDEX */ + 0, 57600, 115200, 230400, + 460800, 150, 200, 921600, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* fastbaud */ + 0, 57600, 76800, 115200, + 131657, 153600, 230400, 460800, + 921600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* fastbaud & CBAUDEX */ + 0, 57600, 115200, 230400, + 460800, 150, 200, 921600, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 } + }; + + /* Only use the TXPrint baud rate if the terminal unit is NOT open */ + if (!(ch->ch_tun.un_flags & UN_ISOPEN) && (un->un_type == DGNC_PRINT)) + baud = C_BAUD(ch->ch_pun.un_tty) & 0xff; + else + baud = C_BAUD(ch->ch_tun.un_tty) & 0xff; + + if (ch->ch_c_cflag & CBAUDEX) + iindex = 1; + + if (ch->ch_digi.digi_flags & DIGI_FAST) + iindex += 2; + + jindex = baud; + + if ((iindex >= 0) && (iindex < 4) && (jindex >= 0) && (jindex < 16)) { + baud = bauds[iindex][jindex]; + } else { + DPR_IOCTL(("baud indices were out of range (%d)(%d)", + iindex, jindex)); + baud = 0; + } + + if (baud == 0) + baud = 9600; + + /* Handle transition from B0 */ + if (ch->ch_flags & CH_BAUD0) { + ch->ch_flags &= ~(CH_BAUD0); + + /* + * Bring back up RTS and DTR... + * Also handle RTS or DTR toggle if set. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + } + } + + if (ch->ch_c_cflag & PARENB) { + lcr |= UART_LCR_PARITY; + } + + if (!(ch->ch_c_cflag & PARODD)) { + lcr |= UART_LCR_EPAR; + } + + /* + * Not all platforms support mark/space parity, + * so this will hide behind an ifdef. + */ +#ifdef CMSPAR + if (ch->ch_c_cflag & CMSPAR) + lcr |= UART_LCR_SPAR; +#endif + + if (ch->ch_c_cflag & CSTOPB) + lcr |= UART_LCR_STOP; + + switch (ch->ch_c_cflag & CSIZE) { + case CS5: + lcr |= UART_LCR_WLEN5; + break; + case CS6: + lcr |= UART_LCR_WLEN6; + break; + case CS7: + lcr |= UART_LCR_WLEN7; + break; + case CS8: + default: + lcr |= UART_LCR_WLEN8; + break; + } + + ier = uart_ier = readb(&ch->ch_neo_uart->ier); + uart_lcr = readb(&ch->ch_neo_uart->lcr); + + if (baud == 0) + baud = 9600; + + quot = ch->ch_bd->bd_dividend / baud; + + if (quot != 0 && ch->ch_old_baud != baud) { + ch->ch_old_baud = baud; + writeb(UART_LCR_DLAB, &ch->ch_neo_uart->lcr); + writeb((quot & 0xff), &ch->ch_neo_uart->txrx); + writeb((quot >> 8), &ch->ch_neo_uart->ier); + writeb(lcr, &ch->ch_neo_uart->lcr); + } + + if (uart_lcr != lcr) + writeb(lcr, &ch->ch_neo_uart->lcr); + + if (ch->ch_c_cflag & CREAD) { + ier |= (UART_IER_RDI | UART_IER_RLSI); + } + else { + ier &= ~(UART_IER_RDI | UART_IER_RLSI); + } + + /* + * Have the UART interrupt on modem signal changes ONLY when + * we are in hardware flow control mode, or CLOCAL/FORCEDCD is not set. + */ + if ((ch->ch_digi.digi_flags & CTSPACE) || (ch->ch_digi.digi_flags & RTSPACE) || + (ch->ch_c_cflag & CRTSCTS) || !(ch->ch_digi.digi_flags & DIGI_FORCEDCD) || + !(ch->ch_c_cflag & CLOCAL)) + { + ier |= UART_IER_MSI; + } + else { + ier &= ~UART_IER_MSI; + } + + ier |= UART_IER_THRI; + + if (ier != uart_ier) + writeb(ier, &ch->ch_neo_uart->ier); + + /* Set new start/stop chars */ + neo_set_new_start_stop_chars(ch); + + if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) { + neo_set_cts_flow_control(ch); + } + else if (ch->ch_c_iflag & IXON) { + /* If start/stop is set to disable, then we should disable flow control */ + if ((ch->ch_startc == _POSIX_VDISABLE) || (ch->ch_stopc == _POSIX_VDISABLE)) + neo_set_no_output_flow_control(ch); + else + neo_set_ixon_flow_control(ch); + } + else { + neo_set_no_output_flow_control(ch); + } + + if (ch->ch_digi.digi_flags & RTSPACE || ch->ch_c_cflag & CRTSCTS) { + neo_set_rts_flow_control(ch); + } + else if (ch->ch_c_iflag & IXOFF) { + /* If start/stop is set to disable, then we should disable flow control */ + if ((ch->ch_startc == _POSIX_VDISABLE) || (ch->ch_stopc == _POSIX_VDISABLE)) + neo_set_no_input_flow_control(ch); + else + neo_set_ixoff_flow_control(ch); + } + else { + neo_set_no_input_flow_control(ch); + } + + /* + * Adjust the RX FIFO Trigger level if baud is less than 9600. + * Not exactly elegant, but this is needed because of the Exar chip's + * delay on firing off the RX FIFO interrupt on slower baud rates. + */ + if (baud < 9600) { + writeb(1, &ch->ch_neo_uart->rfifo); + ch->ch_r_tlevel = 1; + } + + neo_assert_modem_signals(ch); + + /* Get current status of the modem signals now */ + neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); +} + + +/* + * Our board poller function. + */ +static void neo_tasklet(unsigned long data) +{ + struct board_t *bd = (struct board_t *) data; + struct channel_t *ch; + ulong lock_flags; + int i; + int state = 0; + int ports = 0; + + if (!bd || bd->magic != DGNC_BOARD_MAGIC) { + APR(("poll_tasklet() - NULL or bad bd.\n")); + return; + } + + /* Cache a couple board values */ + DGNC_LOCK(bd->bd_lock, lock_flags); + state = bd->state; + ports = bd->nasync; + DGNC_UNLOCK(bd->bd_lock, lock_flags); + + /* + * Do NOT allow the interrupt routine to read the intr registers + * Until we release this lock. + */ + DGNC_LOCK(bd->bd_intr_lock, lock_flags); + + /* + * If board is ready, parse deeper to see if there is anything to do. + */ + if ((state == BOARD_READY) && (ports > 0)) { + /* Loop on each port */ + for (i = 0; i < ports; i++) { + ch = bd->channels[i]; + + /* Just being careful... */ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + continue; + + /* + * NOTE: Remember you CANNOT hold any channel + * locks when calling the input routine. + * + * During input processing, its possible we + * will call the Linux ld, which might in turn, + * do a callback right back into us, resulting + * in us trying to grab the channel lock twice! + */ + dgnc_input(ch); + + /* + * Channel lock is grabbed and then released + * inside both of these routines, but neither + * call anything else that could call back into us. + */ + neo_copy_data_from_queue_to_uart(ch); + dgnc_wakeup_writes(ch); + + /* + * Call carrier carrier function, in case something + * has changed. + */ + dgnc_carrier(ch); + + /* + * Check to see if we need to turn off a sending break. + * The timing check is done inside clear_break() + */ + if (ch->ch_stop_sending_break) + neo_clear_break(ch, 0); + } + } + + /* Allow interrupt routine to access the interrupt register again */ + DGNC_UNLOCK(bd->bd_intr_lock, lock_flags); + +} + + +/* + * dgnc_neo_intr() + * + * Neo specific interrupt handler. + */ +static irqreturn_t neo_intr(int irq, void *voidbrd) +{ + struct board_t *brd = (struct board_t *) voidbrd; + struct channel_t *ch; + int port = 0; + int type = 0; + int current_port; + u32 tmp; + u32 uart_poll; + unsigned long lock_flags; + unsigned long lock_flags2; + + if (!brd) { + APR(("Received interrupt (%d) with null board associated\n", irq)); + return IRQ_NONE; + } + + /* + * Check to make sure its for us. + */ + if (brd->magic != DGNC_BOARD_MAGIC) { + APR(("Received interrupt (%d) with a board pointer that wasn't ours!\n", irq)); + return IRQ_NONE; + } + + brd->intr_count++; + + /* Lock out the slow poller from running on this board. */ + DGNC_LOCK(brd->bd_intr_lock, lock_flags); + + /* + * Read in "extended" IRQ information from the 32bit Neo register. + * Bits 0-7: What port triggered the interrupt. + * Bits 8-31: Each 3bits indicate what type of interrupt occurred. + */ + uart_poll = readl(brd->re_map_membase + UART_17158_POLL_ADDR_OFFSET); + + DPR_INTR(("%s:%d uart_poll: %x\n", __FILE__, __LINE__, uart_poll)); + + /* + * If 0, no interrupts pending. + * This can happen if the IRQ is shared among a couple Neo/Classic boards. + */ + if (!uart_poll) { + DPR_INTR(("Kernel interrupted to me, but no pending interrupts...\n")); + DGNC_UNLOCK(brd->bd_intr_lock, lock_flags); + return IRQ_NONE; + } + + /* At this point, we have at least SOMETHING to service, dig further... */ + + current_port = 0; + + /* Loop on each port */ + while ((uart_poll & 0xff) != 0) { + + tmp = uart_poll; + + /* Check current port to see if it has interrupt pending */ + if ((tmp & dgnc_offset_table[current_port]) != 0) { + port = current_port; + type = tmp >> (8 + (port * 3)); + type &= 0x7; + } else { + current_port++; + continue; + } + + DPR_INTR(("%s:%d port: %x type: %x\n", __FILE__, __LINE__, port, type)); + + /* Remove this port + type from uart_poll */ + uart_poll &= ~(dgnc_offset_table[port]); + + if (!type) { + /* If no type, just ignore it, and move onto next port */ + DPR_INTR(("Interrupt with no type! port: %d\n", port)); + continue; + } + + /* Switch on type of interrupt we have */ + switch (type) { + + case UART_17158_RXRDY_TIMEOUT: + /* + * RXRDY Time-out is cleared by reading data in the + * RX FIFO until it falls below the trigger level. + */ + + /* Verify the port is in range. */ + if (port > brd->nasync) + continue; + + ch = brd->channels[port]; + neo_copy_data_from_uart_to_queue(ch); + + /* Call our tty layer to enforce queue flow control if needed. */ + DGNC_LOCK(ch->ch_lock, lock_flags2); + dgnc_check_queue_flow_control(ch); + DGNC_UNLOCK(ch->ch_lock, lock_flags2); + + continue; + + case UART_17158_RX_LINE_STATUS: + /* + * RXRDY and RX LINE Status (logic OR of LSR[4:1]) + */ + neo_parse_lsr(brd, port); + continue; + + case UART_17158_TXRDY: + /* + * TXRDY interrupt clears after reading ISR register for the UART channel. + */ + + /* + * Yes, this is odd... + * Why would I check EVERY possibility of type of + * interrupt, when we know its TXRDY??? + * Becuz for some reason, even tho we got triggered for TXRDY, + * it seems to be occassionally wrong. Instead of TX, which + * it should be, I was getting things like RXDY too. Weird. + */ + neo_parse_isr(brd, port); + continue; + + case UART_17158_MSR: + /* + * MSR or flow control was seen. + */ + neo_parse_isr(brd, port); + continue; + + default: + /* + * The UART triggered us with a bogus interrupt type. + * It appears the Exar chip, when REALLY bogged down, will throw + * these once and awhile. + * Its harmless, just ignore it and move on. + */ + DPR_INTR(("%s:%d Unknown Interrupt type: %x\n", __FILE__, __LINE__, type)); + continue; + } + } + + /* + * Schedule tasklet to more in-depth servicing at a better time. + */ + tasklet_schedule(&brd->helper_tasklet); + + DGNC_UNLOCK(brd->bd_intr_lock, lock_flags); + + DPR_INTR(("dgnc_intr finish.\n")); + return IRQ_HANDLED; +} + + +/* + * Neo specific way of turning off the receiver. + * Used as a way to enforce queue flow control when in + * hardware flow control mode. + */ +static void neo_disable_receiver(struct channel_t *ch) +{ + uchar tmp = readb(&ch->ch_neo_uart->ier); + tmp &= ~(UART_IER_RDI); + writeb(tmp, &ch->ch_neo_uart->ier); + neo_pci_posting_flush(ch->ch_bd); +} + + +/* + * Neo specific way of turning on the receiver. + * Used as a way to un-enforce queue flow control when in + * hardware flow control mode. + */ +static void neo_enable_receiver(struct channel_t *ch) +{ + uchar tmp = readb(&ch->ch_neo_uart->ier); + tmp |= (UART_IER_RDI); + writeb(tmp, &ch->ch_neo_uart->ier); + neo_pci_posting_flush(ch->ch_bd); +} + + +static void neo_copy_data_from_uart_to_queue(struct channel_t *ch) +{ + int qleft = 0; + uchar linestatus = 0; + uchar error_mask = 0; + int n = 0; + int total = 0; + ushort head; + ushort tail; + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* cache head and tail of queue */ + head = ch->ch_r_head & RQUEUEMASK; + tail = ch->ch_r_tail & RQUEUEMASK; + + /* Get our cached LSR */ + linestatus = ch->ch_cached_lsr; + ch->ch_cached_lsr = 0; + + /* Store how much space we have left in the queue */ + if ((qleft = tail - head - 1) < 0) + qleft += RQUEUEMASK + 1; + + /* + * If the UART is not in FIFO mode, force the FIFO copy to + * NOT be run, by setting total to 0. + * + * On the other hand, if the UART IS in FIFO mode, then ask + * the UART to give us an approximation of data it has RX'ed. + */ + if (!(ch->ch_flags & CH_FIFO_ENABLED)) + total = 0; + else { + total = readb(&ch->ch_neo_uart->rfifo); + + /* + * EXAR chip bug - RX FIFO COUNT - Fudge factor. + * + * This resolves a problem/bug with the Exar chip that sometimes + * returns a bogus value in the rfifo register. + * The count can be any where from 0-3 bytes "off". + * Bizarre, but true. + */ + if ((ch->ch_bd->dvid & 0xf0) >= UART_XR17E158_DVID) { + total -= 1; + } + else { + total -= 3; + } + } + + + /* + * Finally, bound the copy to make sure we don't overflow + * our own queue... + * The byte by byte copy loop below this loop this will + * deal with the queue overflow possibility. + */ + total = min(total, qleft); + + while (total > 0) { + + /* + * Grab the linestatus register, we need to check + * to see if there are any errors in the FIFO. + */ + linestatus = readb(&ch->ch_neo_uart->lsr); + + /* + * Break out if there is a FIFO error somewhere. + * This will allow us to go byte by byte down below, + * finding the exact location of the error. + */ + if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) + break; + + /* Make sure we don't go over the end of our queue */ + n = min(((uint) total), (RQUEUESIZE - (uint) head)); + + /* + * Cut down n even further if needed, this is to fix + * a problem with memcpy_fromio() with the Neo on the + * IBM pSeries platform. + * 15 bytes max appears to be the magic number. + */ + n = min((uint) n, (uint) 12); + + /* + * Since we are grabbing the linestatus register, which + * will reset some bits after our read, we need to ensure + * we don't miss our TX FIFO emptys. + */ + if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) { + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + } + + linestatus = 0; + + /* Copy data from uart to the queue */ + memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, n); + dgnc_sniff_nowait_nolock(ch, "UART READ", ch->ch_rqueue + head, n); + + /* + * Since RX_FIFO_DATA_ERROR was 0, we are guarenteed + * that all the data currently in the FIFO is free of + * breaks and parity/frame/orun errors. + */ + memset(ch->ch_equeue + head, 0, n); + + /* Add to and flip head if needed */ + head = (head + n) & RQUEUEMASK; + total -= n; + qleft -= n; + ch->ch_rxcount += n; + } + + /* + * Create a mask to determine whether we should + * insert the character (if any) into our queue. + */ + if (ch->ch_c_iflag & IGNBRK) + error_mask |= UART_LSR_BI; + + /* + * Now cleanup any leftover bytes still in the UART. + * Also deal with any possible queue overflow here as well. + */ + while (1) { + + /* + * Its possible we have a linestatus from the loop above + * this, so we "OR" on any extra bits. + */ + linestatus |= readb(&ch->ch_neo_uart->lsr); + + /* + * If the chip tells us there is no more data pending to + * be read, we can then leave. + * But before we do, cache the linestatus, just in case. + */ + if (!(linestatus & UART_LSR_DR)) { + ch->ch_cached_lsr = linestatus; + break; + } + + /* No need to store this bit */ + linestatus &= ~UART_LSR_DR; + + /* + * Since we are grabbing the linestatus register, which + * will reset some bits after our read, we need to ensure + * we don't miss our TX FIFO emptys. + */ + if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) { + linestatus &= ~(UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR); + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + } + + /* + * Discard character if we are ignoring the error mask. + */ + if (linestatus & error_mask) { + uchar discard; + linestatus = 0; + memcpy_fromio(&discard, &ch->ch_neo_uart->txrxburst, 1); + continue; + } + + /* + * If our queue is full, we have no choice but to drop some data. + * The assumption is that HWFLOW or SWFLOW should have stopped + * things way way before we got to this point. + * + * I decided that I wanted to ditch the oldest data first, + * I hope thats okay with everyone? Yes? Good. + */ + while (qleft < 1) { + DPR_READ(("Queue full, dropping DATA:%x LSR:%x\n", + ch->ch_rqueue[tail], ch->ch_equeue[tail])); + + ch->ch_r_tail = tail = (tail + 1) & RQUEUEMASK; + ch->ch_err_overrun++; + qleft++; + } + + memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, 1); + ch->ch_equeue[head] = (uchar) linestatus; + dgnc_sniff_nowait_nolock(ch, "UART READ", ch->ch_rqueue + head, 1); + + DPR_READ(("DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head])); + + /* Ditch any remaining linestatus value. */ + linestatus = 0; + + /* Add to and flip head if needed */ + head = (head + 1) & RQUEUEMASK; + + qleft--; + ch->ch_rxcount++; + } + + /* + * Write new final heads to channel structure. + */ + ch->ch_r_head = head & RQUEUEMASK; + ch->ch_e_head = head & EQUEUEMASK; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +/* + * This function basically goes to sleep for secs, or until + * it gets signalled that the port has fully drained. + */ +static int neo_drain(struct tty_struct *tty, uint seconds) +{ + ulong lock_flags; + struct channel_t *ch; + struct un_t *un; + int rc = 0; + + if (!tty || tty->magic != TTY_MAGIC) { + return (-ENXIO); + } + + un = (struct un_t *) tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) { + return (-ENXIO); + } + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return (-ENXIO); + } + + DPR_IOCTL(("%d Drain wait started.\n", __LINE__)); + + DGNC_LOCK(ch->ch_lock, lock_flags); + un->un_flags |= UN_EMPTY; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* + * Go to sleep waiting for the tty layer to wake me back up when + * the empty flag goes away. + * + * NOTE: TODO: Do something with time passed in. + */ + rc = wait_event_interruptible(un->un_flags_wait, ((un->un_flags & UN_EMPTY) == 0)); + + /* If ret is non-zero, user ctrl-c'ed us */ + if (rc) { + DPR_IOCTL(("%d Drain - User ctrl c'ed\n", __LINE__)); + } + else { + DPR_IOCTL(("%d Drain wait finished.\n", __LINE__)); + } + + return (rc); +} + + +/* + * Flush the WRITE FIFO on the Neo. + * + * NOTE: Channel lock MUST be held before calling this function! + */ +static void neo_flush_uart_write(struct channel_t *ch) +{ + uchar tmp = 0; + int i = 0; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); + neo_pci_posting_flush(ch->ch_bd); + + for (i = 0; i < 10; i++) { + + /* Check to see if the UART feels it completely flushed the FIFO. */ + tmp = readb(&ch->ch_neo_uart->isr_fcr); + if (tmp & 4) { + DPR_IOCTL(("Still flushing TX UART... i: %d\n", i)); + udelay(10); + } + else + break; + } + + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); +} + + +/* + * Flush the READ FIFO on the Neo. + * + * NOTE: Channel lock MUST be held before calling this function! + */ +static void neo_flush_uart_read(struct channel_t *ch) +{ + uchar tmp = 0; + int i = 0; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return; + } + + writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR), &ch->ch_neo_uart->isr_fcr); + neo_pci_posting_flush(ch->ch_bd); + + for (i = 0; i < 10; i++) { + + /* Check to see if the UART feels it completely flushed the FIFO. */ + tmp = readb(&ch->ch_neo_uart->isr_fcr); + if (tmp & 2) { + DPR_IOCTL(("Still flushing RX UART... i: %d\n", i)); + udelay(10); + } + else + break; + } +} + + +static void neo_copy_data_from_queue_to_uart(struct channel_t *ch) +{ + ushort head; + ushort tail; + int n; + int s; + int qlen; + uint len_written = 0; + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* No data to write to the UART */ + if (ch->ch_w_tail == ch->ch_w_head) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* If port is "stopped", don't send any data to the UART */ + if ((ch->ch_flags & CH_FORCED_STOP) || (ch->ch_flags & CH_BREAK_SENDING)) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* + * If FIFOs are disabled. Send data directly to txrx register + */ + if (!(ch->ch_flags & CH_FIFO_ENABLED)) { + uchar lsrbits = readb(&ch->ch_neo_uart->lsr); + + /* Cache the LSR bits for later parsing */ + ch->ch_cached_lsr |= lsrbits; + if (ch->ch_cached_lsr & UART_LSR_THRE) { + ch->ch_cached_lsr &= ~(UART_LSR_THRE); + + /* + * If RTS Toggle mode is on, turn on RTS now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_RTS)) { + ch->ch_mostat |= (UART_MCR_RTS); + neo_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + /* + * If DTR Toggle mode is on, turn on DTR now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_DTR)) { + ch->ch_mostat |= (UART_MCR_DTR); + neo_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + + writeb(ch->ch_wqueue[ch->ch_w_tail], &ch->ch_neo_uart->txrx); + DPR_WRITE(("Tx data: %x\n", ch->ch_wqueue[ch->ch_w_head])); + ch->ch_w_tail++; + ch->ch_w_tail &= WQUEUEMASK; + ch->ch_txcount++; + } + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* + * We have to do it this way, because of the EXAR TXFIFO count bug. + */ + if ((ch->ch_bd->dvid & 0xf0) < UART_XR17E158_DVID) { + if (!(ch->ch_flags & (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM))) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + len_written = 0; + + n = readb(&ch->ch_neo_uart->tfifo); + + if ((unsigned int) n > ch->ch_t_tlevel) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + n = UART_17158_TX_FIFOSIZE - ch->ch_t_tlevel; + } + else { + n = UART_17158_TX_FIFOSIZE - readb(&ch->ch_neo_uart->tfifo); + } + + /* cache head and tail of queue */ + head = ch->ch_w_head & WQUEUEMASK; + tail = ch->ch_w_tail & WQUEUEMASK; + qlen = (head - tail) & WQUEUEMASK; + + /* Find minimum of the FIFO space, versus queue length */ + n = min(n, qlen); + + while (n > 0) { + + s = ((head >= tail) ? head : WQUEUESIZE) - tail; + s = min(s, n); + + if (s <= 0) + break; + + /* + * If RTS Toggle mode is on, turn on RTS now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_RTS)) { + ch->ch_mostat |= (UART_MCR_RTS); + neo_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + + /* + * If DTR Toggle mode is on, turn on DTR now if not already set, + * and make sure we get an event when the data transfer has completed. + */ + if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { + if (!(ch->ch_mostat & UART_MCR_DTR)) { + ch->ch_mostat |= (UART_MCR_DTR); + neo_assert_modem_signals(ch); + } + ch->ch_tun.un_flags |= (UN_EMPTY); + } + + memcpy_toio(&ch->ch_neo_uart->txrxburst, ch->ch_wqueue + tail, s); + dgnc_sniff_nowait_nolock(ch, "UART WRITE", ch->ch_wqueue + tail, s); + + /* Add and flip queue if needed */ + tail = (tail + s) & WQUEUEMASK; + n -= s; + ch->ch_txcount += s; + len_written += s; + } + + /* Update the final tail */ + ch->ch_w_tail = tail & WQUEUEMASK; + + if (len_written > 0) { + neo_pci_posting_flush(ch->ch_bd); + ch->ch_flags &= ~(CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +static void neo_parse_modem(struct channel_t *ch, uchar signals) +{ + volatile uchar msignals = signals; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DPR_MSIGS(("neo_parse_modem: port: %d msignals: %x\n", ch->ch_portnum, msignals)); + + /* + * Do altpin switching. Altpin switches DCD and DSR. + * This prolly breaks DSRPACE, so we should be more clever here. + */ + if (ch->ch_digi.digi_flags & DIGI_ALTPIN) { + uchar mswap = msignals; + + if (mswap & UART_MSR_DDCD) { + msignals &= ~UART_MSR_DDCD; + msignals |= UART_MSR_DDSR; + } + if (mswap & UART_MSR_DDSR) { + msignals &= ~UART_MSR_DDSR; + msignals |= UART_MSR_DDCD; + } + if (mswap & UART_MSR_DCD) { + msignals &= ~UART_MSR_DCD; + msignals |= UART_MSR_DSR; + } + if (mswap & UART_MSR_DSR) { + msignals &= ~UART_MSR_DSR; + msignals |= UART_MSR_DCD; + } + } + + /* Scrub off lower bits. They signify delta's, which I don't care about */ + msignals &= 0xf0; + + if (msignals & UART_MSR_DCD) + ch->ch_mistat |= UART_MSR_DCD; + else + ch->ch_mistat &= ~UART_MSR_DCD; + + if (msignals & UART_MSR_DSR) + ch->ch_mistat |= UART_MSR_DSR; + else + ch->ch_mistat &= ~UART_MSR_DSR; + + if (msignals & UART_MSR_RI) + ch->ch_mistat |= UART_MSR_RI; + else + ch->ch_mistat &= ~UART_MSR_RI; + + if (msignals & UART_MSR_CTS) + ch->ch_mistat |= UART_MSR_CTS; + else + ch->ch_mistat &= ~UART_MSR_CTS; + + DPR_MSIGS(("Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n", + ch->ch_portnum, + !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_CTS), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DSR), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_RI), + !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DCD))); +} + + +/* Make the UART raise any of the output signals we want up */ +static void neo_assert_modem_signals(struct channel_t *ch) +{ + uchar out; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + out = ch->ch_mostat; + + if (ch->ch_flags & CH_LOOPBACK) + out |= UART_MCR_LOOP; + + writeb(out, &ch->ch_neo_uart->mcr); + neo_pci_posting_flush(ch->ch_bd); + + /* Give time for the UART to actually raise/drop the signals */ + udelay(10); +} + + +static void neo_send_start_character(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + if (ch->ch_startc != _POSIX_VDISABLE) { + ch->ch_xon_sends++; + writeb(ch->ch_startc, &ch->ch_neo_uart->txrx); + neo_pci_posting_flush(ch->ch_bd); + udelay(10); + } +} + + +static void neo_send_stop_character(struct channel_t *ch) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + if (ch->ch_stopc != _POSIX_VDISABLE) { + ch->ch_xoff_sends++; + writeb(ch->ch_stopc, &ch->ch_neo_uart->txrx); + neo_pci_posting_flush(ch->ch_bd); + udelay(10); + } +} + + +/* + * neo_uart_init + */ +static void neo_uart_init(struct channel_t *ch) +{ + + writeb(0, &ch->ch_neo_uart->ier); + writeb(0, &ch->ch_neo_uart->efr); + writeb(UART_EFR_ECB, &ch->ch_neo_uart->efr); + + + /* Clear out UART and FIFO */ + readb(&ch->ch_neo_uart->txrx); + writeb((UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); + readb(&ch->ch_neo_uart->lsr); + readb(&ch->ch_neo_uart->msr); + + ch->ch_flags |= CH_FIFO_ENABLED; + + /* Assert any signals we want up */ + writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr); + neo_pci_posting_flush(ch->ch_bd); +} + + +/* + * Make the UART completely turn off. + */ +static void neo_uart_off(struct channel_t *ch) +{ + /* Turn off UART enhanced bits */ + writeb(0, &ch->ch_neo_uart->efr); + + /* Stop all interrupts from occurring. */ + writeb(0, &ch->ch_neo_uart->ier); + neo_pci_posting_flush(ch->ch_bd); +} + + +static uint neo_get_uart_bytes_left(struct channel_t *ch) +{ + uchar left = 0; + uchar lsr = readb(&ch->ch_neo_uart->lsr); + + /* We must cache the LSR as some of the bits get reset once read... */ + ch->ch_cached_lsr |= lsr; + + /* Determine whether the Transmitter is empty or not */ + if (!(lsr & UART_LSR_TEMT)) { + if (ch->ch_flags & CH_TX_FIFO_EMPTY) { + tasklet_schedule(&ch->ch_bd->helper_tasklet); + } + left = 1; + } else { + ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); + left = 0; + } + + return left; +} + + +/* Channel lock MUST be held by the calling function! */ +static void neo_send_break(struct channel_t *ch, int msecs) +{ + /* + * If we receive a time of 0, this means turn off the break. + */ + if (msecs == 0) { + if (ch->ch_flags & CH_BREAK_SENDING) { + uchar temp = readb(&ch->ch_neo_uart->lcr); + writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr); + neo_pci_posting_flush(ch->ch_bd); + ch->ch_flags &= ~(CH_BREAK_SENDING); + ch->ch_stop_sending_break = 0; + DPR_IOCTL(("Finishing UART_LCR_SBC! finished: %lx\n", jiffies)); + } + return; + } + + /* + * Set the time we should stop sending the break. + * If we are already sending a break, toss away the existing + * time to stop, and use this new value instead. + */ + ch->ch_stop_sending_break = jiffies + dgnc_jiffies_from_ms(msecs); + + /* Tell the UART to start sending the break */ + if (!(ch->ch_flags & CH_BREAK_SENDING)) { + uchar temp = readb(&ch->ch_neo_uart->lcr); + writeb((temp | UART_LCR_SBC), &ch->ch_neo_uart->lcr); + neo_pci_posting_flush(ch->ch_bd); + ch->ch_flags |= (CH_BREAK_SENDING); + DPR_IOCTL(("Port %d. Starting UART_LCR_SBC! start: %lx should end: %lx\n", + ch->ch_portnum, jiffies, ch->ch_stop_sending_break)); + } +} + + +/* + * neo_send_immediate_char. + * + * Sends a specific character as soon as possible to the UART, + * jumping over any bytes that might be in the write queue. + * + * The channel lock MUST be held by the calling function. + */ +static void neo_send_immediate_char(struct channel_t *ch, unsigned char c) +{ + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + writeb(c, &ch->ch_neo_uart->txrx); + neo_pci_posting_flush(ch->ch_bd); +} + + +static unsigned int neo_read_eeprom(unsigned char *base, unsigned int address) +{ + unsigned int enable; + unsigned int bits; + unsigned int databit; + unsigned int val; + + /* enable chip select */ + writeb(NEO_EECS, base + NEO_EEREG); + /* READ */ + enable = (address | 0x180); + + for (bits = 9; bits--; ) { + databit = (enable & (1 << bits)) ? NEO_EEDI : 0; + /* Set read address */ + writeb(databit | NEO_EECS, base + NEO_EEREG); + writeb(databit | NEO_EECS | NEO_EECK, base + NEO_EEREG); + } + + val = 0; + + for (bits = 17; bits--; ) { + /* clock to EEPROM */ + writeb(NEO_EECS, base + NEO_EEREG); + writeb(NEO_EECS | NEO_EECK, base + NEO_EEREG); + val <<= 1; + /* read EEPROM */ + if (readb(base + NEO_EEREG) & NEO_EEDO) + val |= 1; + } + + /* clock falling edge */ + writeb(NEO_EECS, base + NEO_EEREG); + + /* drop chip select */ + writeb(0x00, base + NEO_EEREG); + + return val; +} + + +static void neo_vpd(struct board_t *brd) +{ + unsigned int i = 0; + unsigned int a; + + if (!brd || brd->magic != DGNC_BOARD_MAGIC) + return; + + if (!brd->re_map_membase) + return; + + /* Store the VPD into our buffer */ + for (i = 0; i < NEO_VPD_IMAGESIZE; i++) { + a = neo_read_eeprom(brd->re_map_membase, i); + brd->vpd[i*2] = a & 0xff; + brd->vpd[(i*2)+1] = (a >> 8) & 0xff; + } + + if (((brd->vpd[0x08] != 0x82) /* long resource name tag */ + && (brd->vpd[0x10] != 0x82)) /* long resource name tag (PCI-66 files)*/ + || (brd->vpd[0x7F] != 0x78)) /* small resource end tag */ + { + memset(brd->vpd, '\0', NEO_VPD_IMAGESIZE); + } + else { + /* Search for the serial number */ + for (i = 0; i < NEO_VPD_IMAGESIZE * 2; i++) { + if (brd->vpd[i] == 'S' && brd->vpd[i + 1] == 'N') { + strncpy(brd->serial_num, &(brd->vpd[i + 3]), 9); + } + } + } +} diff --git a/drivers/staging/dgnc/dgnc_neo.h b/drivers/staging/dgnc/dgnc_neo.h new file mode 100644 index 0000000..ffb4209 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_neo.h @@ -0,0 +1,157 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + */ + +#ifndef __DGNC_NEO_H +#define __DGNC_NEO_H + +#include "dgnc_types.h" +#include "dgnc_driver.h" + +/************************************************************************ + * Per channel/port NEO UART structure * + ************************************************************************ + * Base Structure Entries Usage Meanings to Host * + * * + * W = read write R = read only * + * U = Unused. * + ************************************************************************/ + +struct neo_uart_struct { + volatile uchar txrx; /* WR RHR/THR - Holding Reg */ + volatile uchar ier; /* WR IER - Interrupt Enable Reg */ + volatile uchar isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */ + volatile uchar lcr; /* WR LCR - Line Control Reg */ + volatile uchar mcr; /* WR MCR - Modem Control Reg */ + volatile uchar lsr; /* WR LSR - Line Status Reg */ + volatile uchar msr; /* WR MSR - Modem Status Reg */ + volatile uchar spr; /* WR SPR - Scratch Pad Reg */ + volatile uchar fctr; /* WR FCTR - Feature Control Reg */ + volatile uchar efr; /* WR EFR - Enhanced Function Reg */ + volatile uchar tfifo; /* WR TXCNT/TXTRG - Transmit FIFO Reg */ + volatile uchar rfifo; /* WR RXCNT/RXTRG - Recieve FIFO Reg */ + volatile uchar xoffchar1; /* WR XOFF 1 - XOff Character 1 Reg */ + volatile uchar xoffchar2; /* WR XOFF 2 - XOff Character 2 Reg */ + volatile uchar xonchar1; /* WR XON 1 - Xon Character 1 Reg */ + volatile uchar xonchar2; /* WR XON 2 - XOn Character 2 Reg */ + + volatile uchar reserved1[0x2ff - 0x200]; /* U Reserved by Exar */ + volatile uchar txrxburst[64]; /* RW 64 bytes of RX/TX FIFO Data */ + volatile uchar reserved2[0x37f - 0x340]; /* U Reserved by Exar */ + volatile uchar rxburst_with_errors[64]; /* R 64 bytes of RX FIFO Data + LSR */ +}; + +/* Where to read the extended interrupt register (32bits instead of 8bits) */ +#define UART_17158_POLL_ADDR_OFFSET 0x80 + +/* These are the current dvid's of the Neo boards */ +#define UART_XR17C158_DVID 0x20 +#define UART_XR17D158_DVID 0x20 +#define UART_XR17E158_DVID 0x40 + +#define NEO_EECK 0x10 /* Clock */ +#define NEO_EECS 0x20 /* Chip Select */ +#define NEO_EEDI 0x40 /* Data In is an Output Pin */ +#define NEO_EEDO 0x80 /* Data Out is an Input Pin */ +#define NEO_EEREG 0x8E /* offset to EEPROM control reg */ + + +#define NEO_VPD_IMAGESIZE 0x40 /* size of image to read from EEPROM in words */ +#define NEO_VPD_IMAGEBYTES (NEO_VPD_IMAGESIZE * 2) + +/* + * These are the redefinitions for the FCTR on the XR17C158, since + * Exar made them different than their earlier design. (XR16C854) + */ + +/* These are only applicable when table D is selected */ +#define UART_17158_FCTR_RTS_NODELAY 0x00 +#define UART_17158_FCTR_RTS_4DELAY 0x01 +#define UART_17158_FCTR_RTS_6DELAY 0x02 +#define UART_17158_FCTR_RTS_8DELAY 0x03 +#define UART_17158_FCTR_RTS_12DELAY 0x12 +#define UART_17158_FCTR_RTS_16DELAY 0x05 +#define UART_17158_FCTR_RTS_20DELAY 0x13 +#define UART_17158_FCTR_RTS_24DELAY 0x06 +#define UART_17158_FCTR_RTS_28DELAY 0x14 +#define UART_17158_FCTR_RTS_32DELAY 0x07 +#define UART_17158_FCTR_RTS_36DELAY 0x16 +#define UART_17158_FCTR_RTS_40DELAY 0x08 +#define UART_17158_FCTR_RTS_44DELAY 0x09 +#define UART_17158_FCTR_RTS_48DELAY 0x10 +#define UART_17158_FCTR_RTS_52DELAY 0x11 + +#define UART_17158_FCTR_RTS_IRDA 0x10 +#define UART_17158_FCTR_RS485 0x20 +#define UART_17158_FCTR_TRGA 0x00 +#define UART_17158_FCTR_TRGB 0x40 +#define UART_17158_FCTR_TRGC 0x80 +#define UART_17158_FCTR_TRGD 0xC0 + +/* 17158 trigger table selects.. */ +#define UART_17158_FCTR_BIT6 0x40 +#define UART_17158_FCTR_BIT7 0x80 + +/* 17158 TX/RX memmapped buffer offsets */ +#define UART_17158_RX_FIFOSIZE 64 +#define UART_17158_TX_FIFOSIZE 64 + +/* 17158 Extended IIR's */ +#define UART_17158_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ +#define UART_17158_IIR_XONXOFF 0x10 /* Received an XON/XOFF char */ +#define UART_17158_IIR_HWFLOW_STATE_CHANGE 0x20 /* CTS/DSR or RTS/DTR state change */ +#define UART_17158_IIR_FIFO_ENABLED 0xC0 /* 16550 FIFOs are Enabled */ + +/* + * These are the extended interrupts that get sent + * back to us from the UART's 32bit interrupt register + */ +#define UART_17158_RX_LINE_STATUS 0x1 /* RX Ready */ +#define UART_17158_RXRDY_TIMEOUT 0x2 /* RX Ready Timeout */ +#define UART_17158_TXRDY 0x3 /* TX Ready */ +#define UART_17158_MSR 0x4 /* Modem State Change */ +#define UART_17158_TX_AND_FIFO_CLR 0x40 /* Transmitter Holding Reg Empty */ +#define UART_17158_RX_FIFO_DATA_ERROR 0x80 /* UART detected an RX FIFO Data error */ + +/* + * These are the EXTENDED definitions for the 17C158's Interrupt + * Enable Register. + */ +#define UART_17158_EFR_ECB 0x10 /* Enhanced control bit */ +#define UART_17158_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ +#define UART_17158_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ +#define UART_17158_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ +#define UART_17158_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ + +#define UART_17158_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ +#define UART_17158_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ + +#define UART_17158_IER_RSVD1 0x10 /* Reserved by Exar */ +#define UART_17158_IER_XOFF 0x20 /* Xoff Interrupt Enable */ +#define UART_17158_IER_RTSDTR 0x40 /* Output Interrupt Enable */ +#define UART_17158_IER_CTSDSR 0x80 /* Input Interrupt Enable */ + +/* + * Our Global Variables + */ +extern struct board_ops dgnc_neo_ops; + +#endif diff --git a/drivers/staging/dgnc/dgnc_pci.h b/drivers/staging/dgnc/dgnc_pci.h new file mode 100644 index 0000000..5550707 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_pci.h @@ -0,0 +1,77 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +/* $Id: dgnc_pci.h,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ */ + +#ifndef __DGNC_PCI_H +#define __DGNC_PCI_H + +#define PCIMAX 32 /* maximum number of PCI boards */ + +#define DIGI_VID 0x114F + +#define PCI_DEVICE_CLASSIC_4_DID 0x0028 +#define PCI_DEVICE_CLASSIC_8_DID 0x0029 +#define PCI_DEVICE_CLASSIC_4_422_DID 0x00D0 +#define PCI_DEVICE_CLASSIC_8_422_DID 0x00D1 +#define PCI_DEVICE_NEO_4_DID 0x00B0 +#define PCI_DEVICE_NEO_8_DID 0x00B1 +#define PCI_DEVICE_NEO_2DB9_DID 0x00C8 +#define PCI_DEVICE_NEO_2DB9PRI_DID 0x00C9 +#define PCI_DEVICE_NEO_2RJ45_DID 0x00CA +#define PCI_DEVICE_NEO_2RJ45PRI_DID 0x00CB +#define PCI_DEVICE_NEO_1_422_DID 0x00CC +#define PCI_DEVICE_NEO_1_422_485_DID 0x00CD +#define PCI_DEVICE_NEO_2_422_485_DID 0x00CE +#define PCI_DEVICE_NEO_EXPRESS_8_DID 0x00F0 +#define PCI_DEVICE_NEO_EXPRESS_4_DID 0x00F1 +#define PCI_DEVICE_NEO_EXPRESS_4RJ45_DID 0x00F2 +#define PCI_DEVICE_NEO_EXPRESS_8RJ45_DID 0x00F3 +#define PCI_DEVICE_NEO_EXPRESS_4_IBM_DID 0x00F4 + +#define PCI_DEVICE_CLASSIC_4_PCI_NAME "ClassicBoard 4 PCI" +#define PCI_DEVICE_CLASSIC_8_PCI_NAME "ClassicBoard 8 PCI" +#define PCI_DEVICE_CLASSIC_4_422_PCI_NAME "ClassicBoard 4 422 PCI" +#define PCI_DEVICE_CLASSIC_8_422_PCI_NAME "ClassicBoard 8 422 PCI" +#define PCI_DEVICE_NEO_4_PCI_NAME "Neo 4 PCI" +#define PCI_DEVICE_NEO_8_PCI_NAME "Neo 8 PCI" +#define PCI_DEVICE_NEO_2DB9_PCI_NAME "Neo 2 - DB9 Universal PCI" +#define PCI_DEVICE_NEO_2DB9PRI_PCI_NAME "Neo 2 - DB9 Universal PCI - Powered Ring Indicator" +#define PCI_DEVICE_NEO_2RJ45_PCI_NAME "Neo 2 - RJ45 Universal PCI" +#define PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME "Neo 2 - RJ45 Universal PCI - Powered Ring Indicator" +#define PCI_DEVICE_NEO_1_422_PCI_NAME "Neo 1 422 PCI" +#define PCI_DEVICE_NEO_1_422_485_PCI_NAME "Neo 1 422/485 PCI" +#define PCI_DEVICE_NEO_2_422_485_PCI_NAME "Neo 2 422/485 PCI" + +#define PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME "Neo 8 PCI Express" +#define PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME "Neo 4 PCI Express" +#define PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME "Neo 4 PCI Express RJ45" +#define PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME "Neo 8 PCI Express RJ45" +#define PCI_DEVICE_NEO_EXPRESS_4_IBM_PCI_NAME "Neo 4 PCI Express IBM" + + +/* Size of Memory and I/O for PCI (4 K) */ +#define PCI_RAM_SIZE 0x1000 + +/* Size of Memory (2MB) */ +#define PCI_MEM_SIZE 0x1000 + +#endif diff --git a/drivers/staging/dgnc/dgnc_proc.c b/drivers/staging/dgnc/dgnc_proc.c new file mode 100644 index 0000000..8fbaf3b --- /dev/null +++ b/drivers/staging/dgnc/dgnc_proc.c @@ -0,0 +1,1551 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + * + * $Id: dgnc_proc.c,v 1.3 2011/06/22 12:16:35 markh Exp $ + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/proc_fs.h> +#include <linux/serial_reg.h> +#include <linux/sched.h> /* For in_egroup_p() */ +#include <linux/string.h> +#include <asm/uaccess.h> /* For copy_from_user/copy_to_user */ + +#include "dgnc_driver.h" +#include "dgnc_proc.h" +#include "dgnc_mgmt.h" + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) +#define init_MUTEX(sem) sema_init(sem, 1) +#define DECLARE_MUTEX(name) \ + struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1) +#endif + + +/* The /proc/dgnc directory */ +static struct proc_dir_entry *ProcDGNC; + + +/* File operation declarations */ +static int dgnc_gen_proc_open(struct inode *, struct file *); +static int dgnc_gen_proc_close(struct inode *, struct file *); +static ssize_t dgnc_gen_proc_read(struct file *file, char __user *buf, size_t count, loff_t *ppos); +static ssize_t dgnc_gen_proc_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos); + +static int dgnc_proc_chk_perm(struct inode *, int); + +static const struct file_operations dgnc_proc_file_ops = +{ + .owner = THIS_MODULE, + .read = dgnc_gen_proc_read, /* read */ + .write = dgnc_gen_proc_write, /* write */ + .open = dgnc_gen_proc_open, /* open */ + .release = dgnc_gen_proc_close, /* release */ +}; + + +static struct inode_operations dgnc_proc_inode_ops = +{ + .permission = dgnc_proc_chk_perm +}; + + +static void dgnc_register_proc_table(struct dgnc_proc_entry *, struct proc_dir_entry *); +static void dgnc_unregister_proc_table(struct dgnc_proc_entry *, struct proc_dir_entry *); +static void dgnc_remove_proc_entry(struct proc_dir_entry *pde); + + +/* Stuff in /proc/ */ +static int dgnc_read_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_write_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + const char __user *buffer, ssize_t *lenp, loff_t *ppos); + +static int dgnc_read_mknod(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); + +static struct dgnc_proc_entry dgnc_table[] = { + {DGNC_INFO, "info", 0600, NULL, NULL, NULL, &dgnc_read_info, &dgnc_write_info, + NULL, __SEMAPHORE_INITIALIZER(dgnc_table[0].excl_sem, 1), 0, NULL }, + {DGNC_MKNOD, "mknod", 0600, NULL, NULL, NULL, &dgnc_read_mknod, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_table[1].excl_sem, 1), 0, NULL }, + {0} +}; + + +/* Stuff in /proc/<board>/ */ +static int dgnc_read_board_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_board_vpd(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_board_mknod(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_board_ttystats(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_board_ttyintr(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_board_ttyflags(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); + +static struct dgnc_proc_entry dgnc_board_table[] = { + {DGNC_BOARD_INFO, "info", 0600, NULL, NULL, NULL, &dgnc_read_board_info, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[0].excl_sem, 1), 0, NULL }, + {DGNC_BOARD_VPD, "vpd", 0600, NULL, NULL, NULL, &dgnc_read_board_vpd, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[1].excl_sem, 1), 0, NULL }, + {DGNC_BOARD_TTYSTATS, "stats", 0600, NULL, NULL, NULL, &dgnc_read_board_ttystats, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[2].excl_sem, 1), 0, NULL }, + {DGNC_BOARD_TTYINTR, "intr", 0600, NULL, NULL, NULL, &dgnc_read_board_ttyintr, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[3].excl_sem, 1), 0, NULL }, + {DGNC_BOARD_TTYFLAGS, "flags", 0600, NULL, NULL, NULL, &dgnc_read_board_ttyflags, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[4].excl_sem, 1), 0, NULL }, + {DGNC_BOARD_MKNOD, "mknod", 0600, NULL, NULL, NULL, &dgnc_read_board_mknod, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_board_table[5].excl_sem, 1), 0, NULL }, + {0} +}; + + +/* Stuff in /proc/<board>/<channel> */ +static int dgnc_read_channel_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_open_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_close_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_channel_custom_ttyname(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); +static int dgnc_read_channel_custom_prname(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); + +static struct dgnc_proc_entry dgnc_channel_table[] = { + {DGNC_PORT_INFO, "info", 0600, NULL, NULL, NULL, &dgnc_read_channel_info, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_channel_table[0].excl_sem, 1), 0, NULL }, + {DGNC_PORT_SNIFF, "sniff", 0600, NULL, &dgnc_open_channel_sniff, &dgnc_close_channel_sniff, &dgnc_read_channel_sniff, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_channel_table[1].excl_sem, 1), 0, NULL}, + {DGNC_PORT_CUSTOM_TTYNAME, "ttyname", 0600, NULL, NULL, NULL, &dgnc_read_channel_custom_ttyname, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_channel_table[2].excl_sem, 1), 0, NULL }, + {DGNC_PORT_CUSTOM_PRNAME, "prname", 0600, NULL, NULL, NULL, &dgnc_read_channel_custom_prname, NULL, + NULL, __SEMAPHORE_INITIALIZER(dgnc_channel_table[3].excl_sem, 1), 0, NULL }, + {0} +}; + + +/* + * dgnc_test_perm does NOT grant the superuser all rights automatically, because + * some entries are readonly even to root. + */ +static inline int dgnc_test_perm(int mode, int op) +{ +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) + if (!current->euid) +#else + if (!current_euid()) +#endif + mode >>= 6; + else if (in_egroup_p(0)) + mode >>= 3; + if ((mode & op & 0007) == op) + return 0; + if (capable(CAP_SYS_ADMIN)) + return 0; + return -EACCES; +} + + +/* + * /proc/sys support + */ +static inline int dgnc_proc_match(int len, const char *name, struct proc_dir_entry *de) +{ + if (!de || !de->low_ino) + return 0; + if (de->namelen != len) + return 0; + return !memcmp(name, de->name, len); +} + + +/* + * Scan the entries in table and add them all to /proc at the position + * referred to by "root" + */ +static void dgnc_register_proc_table(struct dgnc_proc_entry *table, struct proc_dir_entry *root) +{ + struct proc_dir_entry *de; + int len; + mode_t mode; + + for (; table->magic; table++) { + /* Can't do anything without a proc name. */ + if (!table->name) { + DPR_PROC(("dgnc_register_proc_table, no name...\n")); + continue; + } + + /* Maybe we can't do anything with it... */ + if (!table->read_handler && !table->write_handler && !table->child) { + DPR_PROC((KERN_WARNING "DGNC PROC: Can't register %s\n", table->name)); + continue; + } + + len = strlen(table->name); + mode = table->mode; + de = NULL; + + if (!table->child) { + mode |= S_IFREG; + } else { + mode |= S_IFDIR; + for (de = root->subdir; de; de = de->next) { + if (dgnc_proc_match(len, table->name, de)) + break; + } + + /* If the subdir exists already, de is non-NULL */ + } + + if (!de) { + de = create_proc_entry(table->name, mode, root); + if (!de) + continue; + de->data = (void *) table; + if (!table->child) { + de->proc_iops = &dgnc_proc_inode_ops; + de->proc_fops = &dgnc_proc_file_ops; + } + } + + table->de = de; + + if (de->mode & S_IFDIR) + dgnc_register_proc_table(table->child, de); + + } +} + + + +/* + * Unregister a /proc sysctl table and any subdirectories. + */ +static void dgnc_unregister_proc_table(struct dgnc_proc_entry *table, struct proc_dir_entry *root) +{ + struct proc_dir_entry *de; + + for (; table->magic; table++) { + if (!(de = table->de)) + continue; + + if (de->mode & S_IFDIR) { + if (!table->child) { + DPR_PROC((KERN_ALERT "Help - malformed sysctl tree on free\n")); + continue; + } + + /* recurse down into subdirectory... */ + DPR_PROC(("Recursing down a directory...\n")); + dgnc_unregister_proc_table(table->child, de); + + /* Don't unregister directories which still have entries.. */ + if (de->subdir) + continue; + } + + /* Don't unregister proc entries that are still being used.. */ + if ((atomic_read(&de->count)) != 1) { + DPR_PROC(("proc entry in use... Not removing...\n")); + continue; + } + + dgnc_remove_proc_entry(de); + table->de = NULL; + } +} + + + +static int dgnc_gen_proc_open(struct inode *inode, struct file *file) +{ + struct proc_dir_entry *de; + struct dgnc_proc_entry *entry; + int (*handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); + int ret = 0, error = 0; + + de = (struct proc_dir_entry *) PDE(file->f_dentry->d_inode); + if (!de || !de->data) { + ret = -ENXIO; + goto done; + } + + entry = (struct dgnc_proc_entry *) de->data; + if (!entry) { + ret = -ENXIO; + goto done; + } + + down(&entry->excl_sem); + + if (entry->excl_cnt) { + ret = -EBUSY; + } else { + entry->excl_cnt++; + + handler = entry->open_handler; + if (handler) { + error = (*handler) (entry, OUTBOUND, file, NULL, NULL, NULL); + if (error) { + entry->excl_cnt--; + ret = error; + } + } + } + + up(&entry->excl_sem); + +done: + + return ret; +} + + +static int dgnc_gen_proc_close(struct inode *inode, struct file *file) +{ + struct proc_dir_entry *de; + int (*handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); + struct dgnc_proc_entry *entry; + int error = 0; + + de = (struct proc_dir_entry *) PDE(file->f_dentry->d_inode); + if (!de || !de->data) + goto done; + + entry = (struct dgnc_proc_entry *) de->data; + if (!entry) + goto done; + + down(&entry->excl_sem); + + if (entry->excl_cnt) + entry->excl_cnt = 0; + + + handler = entry->close_handler; + if (handler) { + error = (*handler) (entry, OUTBOUND, file, NULL, NULL, NULL); + } + + up(&entry->excl_sem); + +done: + return 0; +} + + +static ssize_t dgnc_gen_proc_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) +{ + struct proc_dir_entry *de; + struct dgnc_proc_entry *entry; + int (*handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos2); + ssize_t res; + ssize_t error; + + de = (struct proc_dir_entry*) PDE(file->f_dentry->d_inode); + if (!de || !de->data) + return -ENXIO; + + entry = (struct dgnc_proc_entry *) de->data; + if (!entry) + return -ENXIO; + + /* Test for read permission */ + if (dgnc_test_perm(entry->mode, 4)) + return -EPERM; + + res = count; + + handler = entry->read_handler; + if (!handler) + return -ENXIO; + + error = (*handler) (entry, OUTBOUND, file, buf, &res, ppos); + if (error) + return error; + + return res; +} + + +static ssize_t dgnc_gen_proc_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct proc_dir_entry *de; + struct dgnc_proc_entry *entry; + int (*handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + const char __user *buffer, ssize_t *lenp, loff_t *ppos2); + ssize_t res; + ssize_t error; + + de = (struct proc_dir_entry *) PDE(file->f_dentry->d_inode); + if (!de || !de->data) + return -ENXIO; + + entry = (struct dgnc_proc_entry *) de->data; + if (!entry) + return -ENXIO; + + /* Test for write permission */ + if (dgnc_test_perm(entry->mode, 2)) + return -EPERM; + + res = count; + + handler = entry->write_handler; + if (!handler) + return -ENXIO; + + error = (*handler) (entry, INBOUND, file, buf, &res, ppos); + if (error) + return error; + + return res; +} + + +static int dgnc_proc_chk_perm(struct inode *inode, int op) +{ + return dgnc_test_perm(inode->i_mode, op); +} + + +/* + * Return what is (hopefully) useful information about the + * driver. + */ +static int dgnc_read_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + static int done = 0; + static char buf[4096]; + char *p = buf; + + DPR_PROC(("dgnc_proc_info\n")); + + if (done) { + done = 0; + *lenp = 0; + return 0; + } + + p += sprintf(p, "Driver:\t\t%s\n", DG_NAME); + p += sprintf(p, "\n"); + p += sprintf(p, "Debug:\t\t0x%x\n", dgnc_debug); + p += sprintf(p, "Sysfs Support:\t0x1\n"); + p += sprintf(p, "Rawreadok:\t0x%x\n", dgnc_rawreadok); + p += sprintf(p, "Max Boards:\t%d\n", MAXBOARDS); + p += sprintf(p, "Total Boards:\t%d\n", dgnc_NumBoards); + p += sprintf(p, "Poll rate:\t%dms\n", dgnc_poll_tick); + p += sprintf(p, "Poll counter:\t%ld\n", dgnc_poll_counter); + p += sprintf(p, "State:\t\t%s\n", dgnc_driver_state_text[dgnc_driver_state]); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * When writing to the "info" entry point, I actually allow one + * to modify certain variables. This may be a sleazy overload + * of this /proc entry, but I don't want: + * + * a. to clutter /proc more than I have to + * b. to overload the "config" entry, which would be somewhat + * more natural + * c. necessarily advertise the fact this ability exists + * + * The continued support of this feature has not yet been + * guaranteed. + * + * Writing operates on a "state machine" principle. + * + * State 0: waiting for a symbol to start. Waiting for anything + * which isn't " ' = or whitespace. + * State 1: reading a symbol. If the character is a space, move + * to state 2. If =, move to state 3. If " or ', move + * to state 0. + * State 2: Waiting for =... suck whitespace. If anything other + * than whitespace, drop to state 0. + * State 3: Got =. Suck whitespace waiting for value to start. + * If " or ', go to state 4 (and remember which quote it + * was). Otherwise, go to state 5. + * State 4: Reading value, within quotes. Everything is added to + * value up until the matching quote. When you hit the + * matching quote, try to set the variable, then state 0. + * State 5: Reading value, outside quotes. Everything not " ' = + * or whitespace goes in value. Hitting one of the + * terminators tosses us back to state 0 after trying to + * set the variable. + */ +typedef enum { + INFO_NONE, INFO_INT, INFO_CHAR, INFO_SHORT, + INFO_LONG, INFO_PTR, INFO_STRING, INFO_END +} info_proc_var_val; + +static struct { + char *name; + info_proc_var_val type; + int rw; /* 0=readonly */ + void *val_ptr; +} dgnc_info_vars[] = { + { "rawreadok", INFO_INT, 1, (void *) &dgnc_rawreadok }, + { "pollrate", INFO_INT, 1, (void *) &dgnc_poll_tick }, + { NULL, INFO_NONE, 0, NULL }, + { "debug", INFO_LONG, 1, (void *) &dgnc_debug }, + { NULL, INFO_END, 0, NULL } +}; + +static void dgnc_set_info_var(char *name, char *val) +{ + int i; + unsigned long newval; + unsigned char charval; + unsigned short shortval; + unsigned int intval; + + for (i = 0; dgnc_info_vars[i].type != INFO_END; i++) { + if (dgnc_info_vars[i].name) + if (!strcmp(name, dgnc_info_vars[i].name)) + break; + } + + if (dgnc_info_vars[i].type == INFO_END) + return; + if (dgnc_info_vars[i].rw == 0) + return; + if (dgnc_info_vars[i].val_ptr == NULL) + return; + + newval = simple_strtoul(val, NULL, 0 ); + + switch (dgnc_info_vars[i].type) { + case INFO_CHAR: + charval = newval & 0xff; + APR(("Modifying %s (%lx) <= 0x%02x (%d)\n", + name, (long)(dgnc_info_vars[i].val_ptr ), + charval, charval)); + *(uchar *)(dgnc_info_vars[i].val_ptr) = charval; + break; + case INFO_SHORT: + shortval = newval & 0xffff; + APR(("Modifying %s (%lx) <= 0x%04x (%d)\n", + name, (long)(dgnc_info_vars[i].val_ptr), + shortval, shortval)); + *(ushort *)(dgnc_info_vars[i].val_ptr) = shortval; + break; + case INFO_INT: + intval = newval & 0xffffffff; + APR(("Modifying %s (%lx) <= 0x%08x (%d)\n", + name, (long)(dgnc_info_vars[i].val_ptr), + intval, intval)); + *(uint *)(dgnc_info_vars[i].val_ptr) = intval; + break; + case INFO_LONG: + APR(("Modifying %s (%lx) <= 0x%lx (%ld)\n", + name, (long)(dgnc_info_vars[i].val_ptr), + newval, newval)); + *(ulong *)(dgnc_info_vars[i].val_ptr) = newval; + break; + case INFO_PTR: + case INFO_STRING: + case INFO_END: + case INFO_NONE: + default: + break; + } +} + +static int dgnc_write_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + const char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + static int state = 0; + #define MAXSYM 255 + static int sympos, valpos; + static char sym[MAXSYM + 1]; + static char val[MAXSYM + 1]; + static int quotchar = 0; + + int i; + + long len; + #define INBUFLEN 256 + char inbuf[INBUFLEN]; + + if (*ppos == 0) { + state = 0; + sympos = 0; sym[0] = 0; + valpos = 0; val[0] = 0; + quotchar = 0; + } + + if ((!*lenp) || (dir != INBOUND)) { + *lenp = 0; + return 0; + } + + len = *lenp; + + if (len > INBUFLEN - 1) + len = INBUFLEN - 1; + + if (copy_from_user(inbuf, buffer, len)) + return -EFAULT; + + inbuf[len] = 0; + + for (i = 0; i < len; i++) { + unsigned char c = inbuf[i]; + + switch (state) { + case 0: + quotchar = sympos = valpos = sym[0] = val[0] = 0; + if (!isspace(c) && (c != '\"') && + (c != '\'') && (c != '=')) { + sym[sympos++] = c; + state = 1; + break; + } + break; + case 1: + if (isspace(c)) { + sym[sympos] = 0; + state = 2; + break; + } + if (c == '=') { + sym[sympos] = 0; + state = 3; + break; + } + if ((c == '\"' ) || ( c == '\'' )) { + state = 0; + break; + } + if (sympos < MAXSYM) sym[sympos++] = c; + break; + case 2: + if (isspace(c)) break; + if (c == '=') { + state = 3; + break; + } + if ((c != '\"') && (c != '\'')) { + quotchar = sympos = valpos = sym[0] = val[0] = 0; + sym[sympos++] = c; + state = 1; + break; + } + state = 0; + break; + case 3: + if (isspace(c)) break; + if (c == '=') { + state = 0; + break; + } + if ((c == '\"') || (c == '\'')) { + state = 4; + quotchar = c; + break; + } + val[valpos++] = c; + state = 5; + break; + case 4: + if (c == quotchar) { + val[valpos] = 0; + dgnc_set_info_var(sym, val); + state = 0; + break; + } + if (valpos < MAXSYM) val[valpos++] = c; + break; + case 5: + if (isspace(c) || (c == '\"') || + (c == '\'') || (c == '=')) { + val[valpos] = 0; + dgnc_set_info_var(sym, val); + state = 0; + break; + } + if (valpos < MAXSYM) val[valpos++] = c; + break; + default: + break; + } + } + + *lenp = len; + *ppos += len; + + return len; +} + + +/* + * Return mknod information for the driver's devices. + */ +static int dgnc_read_mknod(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + static int done = 0; + static char buf[4096]; + char *p = buf; + int i = 0; + + DPR_PROC(("dgnc_proc_info\n")); + + if (done) { + done = 0; + *lenp = 0; + return 0; + } + + DPR_PROC(("dgnc_proc_mknod\n")); + + p += sprintf(p, "#\tCreate the management devices.\n"); + + for (i = 0; i < MAXMGMTDEVICES; i++) { + char tmp[100]; + sprintf(tmp, "/dev/dg/dgnc/mgmt%d", i); + p += sprintf(p, "%s\t%d\t%d\t%d\n", + tmp, dgnc_Major, i, 1); + } + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return what is (hopefully) useful information about the specific board. + */ +static int dgnc_read_board_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + char *name; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + name = brd->name; + + p += sprintf(p, "Board Name = %s\n", name); + if (brd->serial_num[0] == '\0') + p += sprintf(p, "Serial number = <UNKNOWN>\n"); + else + p += sprintf(p, "Serial number = %s\n", brd->serial_num); + + p += sprintf(p, "Board Type = %d\n", brd->type); + p += sprintf(p, "Number of Ports = %d\n", brd->nasync); + + /* + * report some things about the PCI bus that are important + * to some applications + */ + p += sprintf(p, "Vendor ID = 0x%x\n", brd->vendor); + p += sprintf(p, "Device ID = 0x%x\n", brd->device); + p += sprintf(p, "Subvendor ID = 0x%x\n", brd->subvendor); + p += sprintf(p, "Subdevice ID = 0x%x\n", brd->subdevice); + p += sprintf(p, "Bus = %d\n", brd->pci_bus); + p += sprintf(p, "Slot = %d\n", brd->pci_slot); + + /* + * report the physical addresses assigned to us when we got + * registered + */ + p += sprintf(p, "Memory Base Address = 0x%lx\n", brd->membase); + p += sprintf(p, "Remapped Memory Base Address = 0x%p\n", brd->re_map_membase); + + p += sprintf(p, "Current state of board = %s\n", dgnc_state_text[brd->state]); + p += sprintf(p, "Interrupt #: %d. Times interrupted: %ld\n", + brd->irq, brd->intr_count); + + p += sprintf(p, "TX interrupts: %ld RX interrupts: %ld\n", + brd->intr_tx, brd->intr_rx); + p += sprintf(p, "Modem interrupts: %ld\n", brd->intr_modem); + + p += sprintf(p, "Majors allocated to board = TTY: %d PR: %d\n", + brd->SerialDriver.major, brd->PrintDriver.major); + + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + + +static int dgnc_read_board_vpd(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + int i = 0, j = 0; + char *p = buf; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + p += sprintf(p, "\n 0 1 2 3 4 5 6 7 8 9 A B C D E F ASCII\n"); + + for (i = 0; i < 0x40 * 2; i++) { + j = i; + if (!(i % 16)) { + if (j > 0) { + p += sprintf(p, " "); + for (j = i - 16; j < i; j++) { + if (0x20 <= brd->vpd[j] && brd->vpd[j] <= 0x7e) + p += sprintf(p, "%c", brd->vpd[j]); + else + p += sprintf(p, "."); + } + p += sprintf(p, "\n"); + } + p += sprintf(p, "%04X ", i); + } + p += sprintf(p, "%02X ", brd->vpd[i]); + } + if (!(i % 16)) { + p += sprintf(p, " "); + for (j = i - 16; j < i; j++) { + if (0x20 <= brd->vpd[j] && brd->vpd[j] <= 0x7e) + p += sprintf(p, "%c", brd->vpd[j]); + else + p += sprintf(p, "."); + } + p += sprintf(p, "\n"); + } + + p += sprintf(p, "\n"); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return what is (hopefully) useful stats about the specific board's ttys + */ +static int dgnc_read_board_ttystats(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + int i = 0; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + /* Prepare the Header Labels */ + p += sprintf(p, "%2s %10s %23s %10s %9s\n", + "Ch", "Chars Rx", " Rx Par--Brk--Frm--Ovr", + "Chars Tx", "XON XOFF"); + + for (i = 0; i < brd->nasync; i++) { + + struct channel_t *ch = brd->channels[i]; + + p += sprintf(p, "%2d ", i); + p += sprintf(p, "%10ld ", ch->ch_rxcount); + p += sprintf(p, " %4ld %4ld %4ld %4ld ", ch->ch_err_parity, + ch->ch_err_break, ch->ch_err_frame, ch->ch_err_overrun); + p += sprintf(p, "%10ld ", ch->ch_txcount); + p += sprintf(p, "%4ld %4ld ", ch->ch_xon_sends, ch->ch_xoff_sends); + + p += sprintf(p, "\n"); + } + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return what is (hopefully) useful stats about the specific board's tty intrs + */ +static int dgnc_read_board_ttyintr(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + int i = 0; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + /* Prepare the Header Labels */ + p += sprintf(p, "%2s %14s %14s %14s\n", + "Ch", "TX interrupts", "RX interrupts", "Modem interrupts"); + + for (i = 0; i < brd->nasync; i++) { + + struct channel_t *ch = brd->channels[i]; + + p += sprintf(p, "%2d ", i); + + p += sprintf(p, " %14ld %14ld %14ld", + ch->ch_intr_tx, ch->ch_intr_rx, ch->ch_intr_modem); + + p += sprintf(p, "\n"); + } + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return what is (hopefully) useful flags about the specific board's ttys + */ +static int dgnc_read_board_ttyflags(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + int i = 0; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + /* Prepare the Header Labels */ + p += sprintf(p, "%2s %5s %5s %5s %5s %5s %10s Line Status Flags\n", + "Ch", "CFlag", "IFlag", "OFlag", "LFlag", "DFlag", "Baud"); + + for (i = 0; i < brd->nasync; i++) { + + struct channel_t *ch = brd->channels[i]; + + p += sprintf(p, "%2d ", i); + p += sprintf(p, "%5x ", ch->ch_c_cflag); + p += sprintf(p, "%5x ", ch->ch_c_iflag); + p += sprintf(p, "%5x ", ch->ch_c_oflag); + p += sprintf(p, "%5x ", ch->ch_c_lflag); + p += sprintf(p, "%5x ", ch->ch_digi.digi_flags); + p += sprintf(p, "%10d ", ch->ch_old_baud); + + if (!ch->ch_open_count) { + p += sprintf(p, " -- -- -- -- -- -- --") ; + } else { + p += sprintf(p, " op %s %s %s %s %s %s", + (ch->ch_mostat & UART_MCR_RTS) ? "rs" : "--", + (ch->ch_mistat & UART_MSR_CTS) ? "cs" : "--", + (ch->ch_mostat & UART_MCR_DTR) ? "tr" : "--", + (ch->ch_mistat & UART_MSR_DSR) ? "mr" : "--", + (ch->ch_mistat & UART_MSR_DCD) ? "cd" : "--", + (ch->ch_mistat & UART_MSR_RI) ? "ri" : "--"); + } + + p += sprintf(p, "\n"); + } + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return mknod information for the board's devices. + */ +static int dgnc_read_board_mknod(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char str[MAXTTYNAMELEN]; + char *p = buf; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + brd = (struct board_t *) table->data; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + /* + * For each board, output the device information in + * a handy table format... + */ + p += sprintf(p, "# Create the TTY and PR devices\n"); + + /* TTY devices */ + sprintf(str, "ttyn%d%%p", brd->boardnum + 1); + p += sprintf(p, "%s\t\t\t%d\t%d\t%d\n", str, + brd->dgnc_Serial_Major, 0, brd->maxports); + + /* PR devices */ + sprintf(str, "prn%d%%p", brd->boardnum + 1); + p += sprintf(p, "%s\t\t\t%d\t%d\t%d\n", str, + brd->dgnc_TransparentPrint_Major, 128, brd->maxports); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return what is (hopefully) useful information about the specific channel. + */ +static int dgnc_read_channel_info(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + static int done = 0; + static char buf[4096]; + char *p = buf; + + DPR_PROC(("dgnc_proc_info\n")); + + ch = (struct channel_t *) table->data; + + if (done || !ch || (ch->magic != DGNC_CHANNEL_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + p += sprintf(p, "Port number:\t\t%d\n", ch->ch_portnum); + p += sprintf(p, "\n"); + + /* Prepare the Header Labels */ + p += sprintf(p, "%10s %23s %10s %9s\n", + "Chars Rx", " Rx Par--Brk--Frm--Ovr", + "Chars Tx", "XON XOFF"); + p += sprintf(p, "%10ld ", ch->ch_rxcount); + p += sprintf(p, " %4ld %4ld %4ld %4ld ", ch->ch_err_parity, + ch->ch_err_break, ch->ch_err_frame, ch->ch_err_overrun); + p += sprintf(p, "%10ld ", ch->ch_txcount); + p += sprintf(p, "%4ld %4ld ", ch->ch_xon_sends, ch->ch_xoff_sends); + p += sprintf(p, "\n\n"); + + /* Prepare the Header Labels */ + p += sprintf(p, "%5s %5s %5s %5s %5s %10s Line Status Flags\n", + "CFlag", "IFlag", "OFlag", "LFlag", "DFlag", "Baud"); + + p += sprintf(p, "%5x ", ch->ch_c_cflag); + p += sprintf(p, "%5x ", ch->ch_c_iflag); + p += sprintf(p, "%5x ", ch->ch_c_oflag); + p += sprintf(p, "%5x ", ch->ch_c_lflag); + p += sprintf(p, "%5x ", ch->ch_digi.digi_flags); + p += sprintf(p, "%10d ", ch->ch_old_baud); + if (!ch->ch_open_count) { + p += sprintf(p, " -- -- -- -- -- -- --") ; + } else { + p += sprintf(p, " op %s %s %s %s %s %s", + (ch->ch_mostat & UART_MCR_RTS) ? "rs" : "--", + (ch->ch_mistat & UART_MSR_CTS) ? "cs" : "--", + (ch->ch_mostat & UART_MCR_DTR) ? "tr" : "--", + (ch->ch_mistat & UART_MSR_DSR) ? "mr" : "--", + (ch->ch_mistat & UART_MSR_DCD) ? "cd" : "--", + (ch->ch_mistat & UART_MSR_RI) ? "ri" : "--"); + } + p += sprintf(p, "\n\n"); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +/* + * Return mknod information for the board's devices. + */ +static int dgnc_read_channel_custom_ttyname(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + int cn; + int bn; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + ch = (struct channel_t *) table->data; + + if (done || !ch || (ch->magic != DGNC_CHANNEL_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + brd = ch->ch_bd; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + bn = brd->boardnum; + cn = ch->ch_portnum; + + p += sprintf(p, "ttyn%d%c\n", bn + 1, 'a' + cn); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + + + +/* + * Return mknod information for the board's devices. + */ +static int dgnc_read_channel_custom_prname(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + struct board_t *brd; + static int done = 0; + static char buf[4096]; + char *p = buf; + int cn; + int bn; + + DPR_PROC(("dgnc_proc_brd_info\n")); + + ch = (struct channel_t *) table->data; + + if (done || !ch || (ch->magic != DGNC_CHANNEL_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + brd = ch->ch_bd; + + if (done || !brd || (brd->magic != DGNC_BOARD_MAGIC)) { + done = 0; + *lenp = 0; + return 0; + } + + bn = brd->boardnum; + cn = ch->ch_portnum; + + p += sprintf(p, "prn%d%c\n", bn + 1, 'a' + cn); + + if (copy_to_user(buffer, buf, (p - (char *) buf))) + return -EFAULT; + + *lenp = p - (char *) buf; + *ppos += p - (char *) buf; + done = 1; + return 0; +} + + +static int dgnc_open_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + ulong lock_flags; + + ch = (struct channel_t *) table->data; + + if (!ch || (ch->magic != DGNC_CHANNEL_MAGIC)) + return 0; + + ch->ch_sniff_buf = dgnc_driver_kzmalloc(SNIFF_MAX, GFP_KERNEL); + + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_sniff_flags |= SNIFF_OPEN; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + return 0; +} + +static int dgnc_close_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + ulong lock_flags; + + ch = (struct channel_t *) table->data; + + if (!ch || (ch->magic != DGNC_CHANNEL_MAGIC)) + return 0; + + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_sniff_flags &= ~(SNIFF_OPEN); + kfree(ch->ch_sniff_buf); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + return 0; +} + + +/* + * Copy data from the monitoring buffer to the user, freeing space + * in the monitoring buffer for more messages + * + */ +static int dgnc_read_channel_sniff(struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos) +{ + struct channel_t *ch; + int n; + int r; + int offset = 0; + int res = 0; + ssize_t rtn = 0; + ulong lock_flags; + + ch = (struct channel_t *) table->data; + + if (!ch || (ch->magic != DGNC_CHANNEL_MAGIC)) { + rtn = -ENXIO; + goto done; + } + + /* + * Wait for some data to appear in the buffer. + */ + DGNC_LOCK(ch->ch_lock, lock_flags); + + for (;;) { + n = (ch->ch_sniff_in - ch->ch_sniff_out) & SNIFF_MASK; + + if (n != 0) + break; + + ch->ch_sniff_flags |= SNIFF_WAIT_DATA; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* + * Go to sleep waiting until the condition becomes true. + */ + rtn = wait_event_interruptible(ch->ch_sniff_wait, + ((ch->ch_sniff_flags & SNIFF_WAIT_DATA) == 0)); + + if (rtn) + goto done; + + DGNC_LOCK(ch->ch_lock, lock_flags); + } + + /* + * Read whatever is there. + */ + + if (n > *lenp) + n = *lenp; + + res = n; + + r = SNIFF_MAX - ch->ch_sniff_out; + + if (r <= n) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rtn = copy_to_user(buffer, ch->ch_sniff_buf + ch->ch_sniff_out, r); + if (rtn) { + rtn = -EFAULT; + goto done; + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_sniff_out = 0; + n -= r; + offset = r; + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rtn = copy_to_user(buffer + offset, ch->ch_sniff_buf + ch->ch_sniff_out, n); + if (rtn) { + rtn = -EFAULT; + goto done; + } + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_sniff_out += n; + *ppos += res; + rtn = res; +// rtn = 0; + + /* + * Wakeup any thread waiting for buffer space. + */ + + if (ch->ch_sniff_flags & SNIFF_WAIT_SPACE) { + ch->ch_sniff_flags &= ~SNIFF_WAIT_SPACE; + wake_up_interruptible(&ch->ch_sniff_wait); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + +done: + return rtn; +} + + +/* + * Register the basic /proc/dgnc files that appear whenever + * the driver is loaded. + */ +void dgnc_proc_register_basic_prescan(void) +{ + /* + * Register /proc/dgnc + */ + ProcDGNC = proc_create("dgnc", (0700 | S_IFDIR), NULL, &dgnc_proc_file_ops); + dgnc_register_proc_table(dgnc_table, ProcDGNC); +} + + +/* + * Register the basic /proc/dgnc files that appear whenever + * the driver is loaded. + */ +void dgnc_proc_register_basic_postscan(int board_num) +{ + int i, j; + char board[10]; + sprintf(board, "%d", board_num); + + /* Set proc board entry pointer */ + dgnc_Board[board_num]->proc_entry_pointer = create_proc_entry(board, (0700 | S_IFDIR), ProcDGNC); + + /* Create a new copy of the board_table... */ + dgnc_Board[board_num]->dgnc_board_table = dgnc_driver_kzmalloc(sizeof(dgnc_board_table), + GFP_KERNEL); + + /* Now copy the default table into that memory */ + memcpy(dgnc_Board[board_num]->dgnc_board_table, dgnc_board_table, sizeof(dgnc_board_table)); + + /* Initialize semaphores in each table slot */ + for (i = 0; i < 999; i++) { + if (!dgnc_Board[board_num]->dgnc_board_table[i].magic) { + break; + } + + init_MUTEX(&(dgnc_Board[board_num]->dgnc_board_table[i].excl_sem)); + dgnc_Board[board_num]->dgnc_board_table[i].data = dgnc_Board[board_num]; + + } + + /* Register board table into proc */ + dgnc_register_proc_table(dgnc_Board[board_num]->dgnc_board_table, + dgnc_Board[board_num]->proc_entry_pointer); + + /* + * Add new entries for each port. + */ + for (i = 0; i < dgnc_Board[board_num]->nasync; i++) { + + char channel[10]; + sprintf(channel, "%d", i); + + /* Set proc channel entry pointer */ + dgnc_Board[board_num]->channels[i]->proc_entry_pointer = + create_proc_entry(channel, (0700 | S_IFDIR), + dgnc_Board[board_num]->proc_entry_pointer); + + /* Create a new copy of the channel_table... */ + dgnc_Board[board_num]->channels[i]->dgnc_channel_table = + dgnc_driver_kzmalloc(sizeof(dgnc_channel_table), GFP_KERNEL); + + /* Now copy the default table into that memory */ + memcpy(dgnc_Board[board_num]->channels[i]->dgnc_channel_table, + dgnc_channel_table, sizeof(dgnc_channel_table)); + + /* Initialize semaphores in each table slot */ + for (j = 0; j < 999; j++) { + if (!dgnc_Board[board_num]->channels[i]->dgnc_channel_table[j].magic) { + break; + } + + init_MUTEX(&(dgnc_Board[board_num]->channels[i]->dgnc_channel_table[j].excl_sem)); + dgnc_Board[board_num]->channels[i]->dgnc_channel_table[j].data = + dgnc_Board[board_num]->channels[i]; + } + + /* Register channel table into proc */ + dgnc_register_proc_table(dgnc_Board[board_num]->channels[i]->dgnc_channel_table, + dgnc_Board[board_num]->channels[i]->proc_entry_pointer); + } +} + + +static void dgnc_remove_proc_entry(struct proc_dir_entry *pde) +{ + if (!pde) { + DPR_PROC(("dgnc_remove_proc_entry... NULL entry... not removing...\n")); + return; + } + + remove_proc_entry(pde->name, pde->parent); +} + + +void dgnc_proc_unregister_all(void) +{ + int i = 0, j = 0; + + /* Walk each board, blowing away their proc entries... */ + for (i = 0; i < dgnc_NumBoards; i++) { + + /* Walk each channel, blowing away their proc entries... */ + for (j = 0; j < dgnc_Board[i]->nasync; j++) { + + dgnc_unregister_proc_table(dgnc_Board[i]->channels[j]->dgnc_channel_table, + dgnc_Board[i]->channels[j]->proc_entry_pointer); + dgnc_remove_proc_entry(dgnc_Board[i]->channels[j]->proc_entry_pointer); + kfree(dgnc_Board[i]->channels[j]->dgnc_channel_table); + } + + dgnc_unregister_proc_table(dgnc_Board[i]->dgnc_board_table, + dgnc_Board[i]->proc_entry_pointer); + dgnc_remove_proc_entry(dgnc_Board[i]->proc_entry_pointer); + kfree(dgnc_Board[i]->dgnc_board_table); + } + + /* Blow away the top proc entry */ + dgnc_unregister_proc_table(dgnc_table, ProcDGNC); + dgnc_remove_proc_entry(ProcDGNC); +} diff --git a/drivers/staging/dgnc/dgnc_proc.h b/drivers/staging/dgnc/dgnc_proc.h new file mode 100644 index 0000000..19670e2 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_proc.h @@ -0,0 +1,147 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + * + * $Id: dgnc_proc.h,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + * + * Description: + * + * Describes the private structures used to manipulate the "special" + * proc constructs (not read-only) used by the Digi Neo software. + * The concept is borrowed heavily from the "sysctl" interface of + * the kernel. I decided not to use the structures and functions + * provided by the kernel for two reasons: + * + * 1. Due to the planned use of "/proc" in the Neo driver, many + * of the functions of the "sysctl" interface would go unused. + * A simpler interface will be easier to maintain. + * + * 2. I'd rather divorce our "added package" from the kernel internals. + * If the "sysctl" structures should change, I will be insulated + * from those changes. These "/proc" entries won't be under the + * "sys" tree anyway, so there is no need to maintain a strict + * dependence relationship. + * + * Author: + * + * Scott H Kilau + * + */ + +#ifndef _DGNC_RW_PROC_H +#define _DGNC_RW_PROC_H + +/* + * The list of DGNC entries with r/w capabilities. + * These magic numbers are used for identification purposes. + */ +enum { + DGNC_INFO = 1, /* Get info about the running module */ + DGNC_MKNOD = 2, /* Get info about driver devices */ + DGNC_BOARD_INFO = 3, /* Get info about the specific board */ + DGNC_BOARD_VPD = 4, /* Get info about the board's VPD */ + DGNC_BOARD_TTYSTATS = 5, /* Get info about the board's tty stats */ + DGNC_BOARD_TTYINTR = 6, /* Get info about the board's tty intrs */ + DGNC_BOARD_TTYFLAGS = 7, /* Get info about the board's tty flags */ + DGNC_BOARD_MKNOD = 8, /* Get info about board devices */ + DGNC_PORT_INFO = 9, /* Get info about the specific port */ + DGNC_PORT_SNIFF = 10, /* Sniff data in/out of specific port */ + DGNC_PORT_CUSTOM_TTYNAME = 11, /* Get info about UDEV tty name */ + DGNC_PORT_CUSTOM_PRNAME = 12, /* Get info about UDEV pr name */ +}; + +/* + * Directions for proc handlers + */ +enum { + INBOUND = 1, /* Data being written to kernel */ + OUTBOUND = 2, /* Data being read from the kernel */ +}; + +/* + * Each entry in a DGNC proc directory is described with a + * "dgnc_proc_entry" structure. A collection of these + * entries (in an array) represents the members associated + * with a particular "/proc" directory, and is referred to + * as a table. All "tables" are terminated by an entry with + * zeros for every member. + * + * The structure members are as follows: + * + * int magic -- ID number associated with this particular + * entry. Should be unique across all of + * DGNC. + * + * const char *name -- ASCII name associated with the /proc entry. + * + * mode_t mode -- File access permisssions for the /proc entry. + * + * dgnc_proc_entry *child -- When set, this entry refers to a directory, + * and points to the table which describes the + * entries in the subdirectory + * + * dgnc_proc_handler *open_handler -- When set, points to the fxn which + * does any "extra" open stuff. + * + * dgnc_proc_handler *close_handler -- When set, points to the fxn which + * does any "extra" close stuff. + * + * dgnc_proc_handler *read_handler -- When set, points to the fxn which + * handle outbound data flow + * + * dgnc_proc_handler *write_handler -- When set, points to the fxn which + * handles inbound data flow + * + * struct proc_dir_entry *de -- Pointer to the directory entry for this + * object once registered. Used to grab + * the handle of the object for + * unregistration + * + * void *data; When set, points to the parent structure + * + */ + +struct dgnc_proc_entry { + int magic; /* Integer identifier */ + const char *name; /* ASCII identifier */ + mode_t mode; /* File access permissions */ + struct dgnc_proc_entry *child; /* Child pointer */ + + int (*open_handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); + int (*close_handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + void *buffer, ssize_t *lenp, loff_t *ppos); + int (*read_handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + char __user *buffer, ssize_t *lenp, loff_t *ppos); + int (*write_handler) (struct dgnc_proc_entry *table, int dir, struct file *filp, + const char __user *buffer, ssize_t *lenp, loff_t *ppos); + + struct proc_dir_entry *de; /* proc entry pointer */ + struct semaphore excl_sem; /* Protects exclusive access var */ + int excl_cnt; /* Counts number of curr accesses */ + void *data; /* Allows storing a pointer to parent */ +}; + +void dgnc_proc_register_basic_prescan(void); +void dgnc_proc_register_basic_postscan(int board_num); +void dgnc_proc_unregister_all(void); + + +#endif /* _DGNC_RW_PROC_H */ diff --git a/drivers/staging/dgnc/dgnc_sysfs.c b/drivers/staging/dgnc/dgnc_sysfs.c new file mode 100644 index 0000000..af49e44 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_sysfs.c @@ -0,0 +1,761 @@ +/* + * Copyright 2004 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + * + * + * $Id: dgnc_sysfs.c,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + */ + + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/serial_reg.h> +#include <linux/device.h> +#include <linux/pci.h> +#include <linux/kdev_t.h> + +#include "dgnc_driver.h" +#include "dgnc_proc.h" +#include "dgnc_mgmt.h" + + +static ssize_t dgnc_driver_version_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", DG_PART); +} +static DRIVER_ATTR(version, S_IRUSR, dgnc_driver_version_show, NULL); + + +static ssize_t dgnc_driver_boards_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", dgnc_NumBoards); +} +static DRIVER_ATTR(boards, S_IRUSR, dgnc_driver_boards_show, NULL); + + +static ssize_t dgnc_driver_maxboards_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", MAXBOARDS); +} +static DRIVER_ATTR(maxboards, S_IRUSR, dgnc_driver_maxboards_show, NULL); + + +static ssize_t dgnc_driver_pollcounter_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%ld\n", dgnc_poll_counter); +} +static DRIVER_ATTR(pollcounter, S_IRUSR, dgnc_driver_pollcounter_show, NULL); + + +static ssize_t dgnc_driver_state_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", dgnc_driver_state_text[dgnc_driver_state]); +} +static DRIVER_ATTR(state, S_IRUSR, dgnc_driver_state_show, NULL); + + +static ssize_t dgnc_driver_debug_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "0x%x\n", dgnc_debug); +} + +static ssize_t dgnc_driver_debug_store(struct device_driver *ddp, const char *buf, size_t count) +{ + sscanf(buf, "0x%x\n", &dgnc_debug); + return count; +} +static DRIVER_ATTR(debug, (S_IRUSR | S_IWUSR), dgnc_driver_debug_show, dgnc_driver_debug_store); + + +static ssize_t dgnc_driver_rawreadok_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "0x%x\n", dgnc_rawreadok); +} + +static ssize_t dgnc_driver_rawreadok_store(struct device_driver *ddp, const char *buf, size_t count) +{ + sscanf(buf, "0x%x\n", &dgnc_rawreadok); + return count; +} +static DRIVER_ATTR(rawreadok, (S_IRUSR | S_IWUSR), dgnc_driver_rawreadok_show, dgnc_driver_rawreadok_store); + + +static ssize_t dgnc_driver_pollrate_show(struct device_driver *ddp, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%dms\n", dgnc_poll_tick); +} + +static ssize_t dgnc_driver_pollrate_store(struct device_driver *ddp, const char *buf, size_t count) +{ + sscanf(buf, "%d\n", &dgnc_poll_tick); + return count; +} +static DRIVER_ATTR(pollrate, (S_IRUSR | S_IWUSR), dgnc_driver_pollrate_show, dgnc_driver_pollrate_store); + + +void dgnc_create_driver_sysfiles(struct pci_driver *dgnc_driver) +{ + int rc = 0; + struct device_driver *driverfs = &dgnc_driver->driver; + + rc |= driver_create_file(driverfs, &driver_attr_version); + rc |= driver_create_file(driverfs, &driver_attr_boards); + rc |= driver_create_file(driverfs, &driver_attr_maxboards); + rc |= driver_create_file(driverfs, &driver_attr_debug); + rc |= driver_create_file(driverfs, &driver_attr_rawreadok); + rc |= driver_create_file(driverfs, &driver_attr_pollrate); + rc |= driver_create_file(driverfs, &driver_attr_pollcounter); + rc |= driver_create_file(driverfs, &driver_attr_state); + if (rc) { + printk(KERN_ERR "DGNC: sysfs driver_create_file failed!\n"); + } +} + + +void dgnc_remove_driver_sysfiles(struct pci_driver *dgnc_driver) +{ + struct device_driver *driverfs = &dgnc_driver->driver; + driver_remove_file(driverfs, &driver_attr_version); + driver_remove_file(driverfs, &driver_attr_boards); + driver_remove_file(driverfs, &driver_attr_maxboards); + driver_remove_file(driverfs, &driver_attr_debug); + driver_remove_file(driverfs, &driver_attr_rawreadok); + driver_remove_file(driverfs, &driver_attr_pollrate); + driver_remove_file(driverfs, &driver_attr_pollcounter); + driver_remove_file(driverfs, &driver_attr_state); +} + + +#define DGNC_VERIFY_BOARD(p, bd) \ + if (!p) \ + return (0); \ + \ + bd = dev_get_drvdata(p); \ + if (!bd || bd->magic != DGNC_BOARD_MAGIC) \ + return (0); \ + if (bd->state != BOARD_READY) \ + return (0); \ + + + +static ssize_t dgnc_vpd_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + count += sprintf(buf + count, "\n 0 1 2 3 4 5 6 7 8 9 A B C D E F"); + for (i = 0; i < 0x40 * 2; i++) { + if (!(i % 16)) + count += sprintf(buf + count, "\n%04X ", i * 2); + count += sprintf(buf + count, "%02X ", bd->vpd[i]); + } + count += sprintf(buf + count, "\n"); + + return count; +} +static DEVICE_ATTR(vpd, S_IRUSR, dgnc_vpd_show, NULL); + +static ssize_t dgnc_serial_number_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + + DGNC_VERIFY_BOARD(p, bd); + + if (bd->serial_num[0] == '\0') + count += sprintf(buf + count, "<UNKNOWN>\n"); + else + count += sprintf(buf + count, "%s\n", bd->serial_num); + + return count; +} +static DEVICE_ATTR(serial_number, S_IRUSR, dgnc_serial_number_show, NULL); + + +static ssize_t dgnc_ports_state_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, + "%d %s\n", bd->channels[i]->ch_portnum, + bd->channels[i]->ch_open_count ? "Open" : "Closed"); + } + return count; +} +static DEVICE_ATTR(ports_state, S_IRUSR, dgnc_ports_state_show, NULL); + + +static ssize_t dgnc_ports_baud_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, + "%d %d\n", bd->channels[i]->ch_portnum, bd->channels[i]->ch_old_baud); + } + return count; +} +static DEVICE_ATTR(ports_baud, S_IRUSR, dgnc_ports_baud_show, NULL); + + +static ssize_t dgnc_ports_msignals_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + if (bd->channels[i]->ch_open_count) { + count += snprintf(buf + count, PAGE_SIZE - count, + "%d %s %s %s %s %s %s\n", bd->channels[i]->ch_portnum, + (bd->channels[i]->ch_mostat & UART_MCR_RTS) ? "RTS" : "", + (bd->channels[i]->ch_mistat & UART_MSR_CTS) ? "CTS" : "", + (bd->channels[i]->ch_mostat & UART_MCR_DTR) ? "DTR" : "", + (bd->channels[i]->ch_mistat & UART_MSR_DSR) ? "DSR" : "", + (bd->channels[i]->ch_mistat & UART_MSR_DCD) ? "DCD" : "", + (bd->channels[i]->ch_mistat & UART_MSR_RI) ? "RI" : ""); + } else { + count += snprintf(buf + count, PAGE_SIZE - count, + "%d\n", bd->channels[i]->ch_portnum); + } + } + return count; +} +static DEVICE_ATTR(ports_msignals, S_IRUSR, dgnc_ports_msignals_show, NULL); + + +static ssize_t dgnc_ports_iflag_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_c_iflag); + } + return count; +} +static DEVICE_ATTR(ports_iflag, S_IRUSR, dgnc_ports_iflag_show, NULL); + + +static ssize_t dgnc_ports_cflag_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_c_cflag); + } + return count; +} +static DEVICE_ATTR(ports_cflag, S_IRUSR, dgnc_ports_cflag_show, NULL); + + +static ssize_t dgnc_ports_oflag_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_c_oflag); + } + return count; +} +static DEVICE_ATTR(ports_oflag, S_IRUSR, dgnc_ports_oflag_show, NULL); + + +static ssize_t dgnc_ports_lflag_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_c_lflag); + } + return count; +} +static DEVICE_ATTR(ports_lflag, S_IRUSR, dgnc_ports_lflag_show, NULL); + + +static ssize_t dgnc_ports_digi_flag_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_digi.digi_flags); + } + return count; +} +static DEVICE_ATTR(ports_digi_flag, S_IRUSR, dgnc_ports_digi_flag_show, NULL); + + +static ssize_t dgnc_ports_rxcount_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %ld\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_rxcount); + } + return count; +} +static DEVICE_ATTR(ports_rxcount, S_IRUSR, dgnc_ports_rxcount_show, NULL); + + +static ssize_t dgnc_ports_txcount_show(struct device *p, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + int count = 0; + int i = 0; + + DGNC_VERIFY_BOARD(p, bd); + + for (i = 0; i < bd->nasync; i++) { + count += snprintf(buf + count, PAGE_SIZE - count, "%d %ld\n", + bd->channels[i]->ch_portnum, bd->channels[i]->ch_txcount); + } + return count; +} +static DEVICE_ATTR(ports_txcount, S_IRUSR, dgnc_ports_txcount_show, NULL); + + +/* this function creates the sys files that will export each signal status + * to sysfs each value will be put in a separate filename + */ +void dgnc_create_ports_sysfiles(struct board_t *bd) +{ + int rc = 0; + + dev_set_drvdata(&bd->pdev->dev, bd); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_state); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_baud); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_msignals); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_iflag); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_cflag); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_oflag); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_lflag); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_digi_flag); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_rxcount); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_ports_txcount); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_vpd); + rc |= device_create_file(&(bd->pdev->dev), &dev_attr_serial_number); + if (rc) { + printk(KERN_ERR "DGNC: sysfs device_create_file failed!\n"); + } +} + + +/* removes all the sys files created for that port */ +void dgnc_remove_ports_sysfiles(struct board_t *bd) +{ + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_state); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_baud); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_msignals); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_iflag); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_cflag); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_oflag); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_lflag); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_digi_flag); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_rxcount); + device_remove_file(&(bd->pdev->dev), &dev_attr_ports_txcount); + device_remove_file(&(bd->pdev->dev), &dev_attr_vpd); + device_remove_file(&(bd->pdev->dev), &dev_attr_serial_number); +} + + +static ssize_t dgnc_tty_state_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%s", un->un_open_count ? "Open" : "Closed"); +} +static DEVICE_ATTR(state, S_IRUSR, dgnc_tty_state_show, NULL); + + +static ssize_t dgnc_tty_baud_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_old_baud); +} +static DEVICE_ATTR(baud, S_IRUSR, dgnc_tty_baud_show, NULL); + + +static ssize_t dgnc_tty_msignals_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + if (ch->ch_open_count) { + return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n", + (ch->ch_mostat & UART_MCR_RTS) ? "RTS" : "", + (ch->ch_mistat & UART_MSR_CTS) ? "CTS" : "", + (ch->ch_mostat & UART_MCR_DTR) ? "DTR" : "", + (ch->ch_mistat & UART_MSR_DSR) ? "DSR" : "", + (ch->ch_mistat & UART_MSR_DCD) ? "DCD" : "", + (ch->ch_mistat & UART_MSR_RI) ? "RI" : ""); + } + return 0; +} +static DEVICE_ATTR(msignals, S_IRUSR, dgnc_tty_msignals_show, NULL); + + +static ssize_t dgnc_tty_iflag_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_iflag); +} +static DEVICE_ATTR(iflag, S_IRUSR, dgnc_tty_iflag_show, NULL); + + +static ssize_t dgnc_tty_cflag_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_cflag); +} +static DEVICE_ATTR(cflag, S_IRUSR, dgnc_tty_cflag_show, NULL); + + +static ssize_t dgnc_tty_oflag_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_oflag); +} +static DEVICE_ATTR(oflag, S_IRUSR, dgnc_tty_oflag_show, NULL); + + +static ssize_t dgnc_tty_lflag_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_lflag); +} +static DEVICE_ATTR(lflag, S_IRUSR, dgnc_tty_lflag_show, NULL); + + +static ssize_t dgnc_tty_digi_flag_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_digi.digi_flags); +} +static DEVICE_ATTR(digi_flag, S_IRUSR, dgnc_tty_digi_flag_show, NULL); + + +static ssize_t dgnc_tty_rxcount_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%ld\n", ch->ch_rxcount); +} +static DEVICE_ATTR(rxcount, S_IRUSR, dgnc_tty_rxcount_show, NULL); + + +static ssize_t dgnc_tty_txcount_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%ld\n", ch->ch_txcount); +} +static DEVICE_ATTR(txcount, S_IRUSR, dgnc_tty_txcount_show, NULL); + + +static ssize_t dgnc_tty_name_show(struct device *d, struct device_attribute *attr, char *buf) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + + if (!d) + return (0); + un = (struct un_t *) dev_get_drvdata(d); + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (0); + if (bd->state != BOARD_READY) + return (0); + + return snprintf(buf, PAGE_SIZE, "%sn%d%c\n", + (un->un_type == DGNC_PRINT) ? "pr" : "tty", + bd->boardnum + 1, 'a' + ch->ch_portnum); +} +static DEVICE_ATTR(custom_name, S_IRUSR, dgnc_tty_name_show, NULL); + + +static struct attribute *dgnc_sysfs_tty_entries[] = { + &dev_attr_state.attr, + &dev_attr_baud.attr, + &dev_attr_msignals.attr, + &dev_attr_iflag.attr, + &dev_attr_cflag.attr, + &dev_attr_oflag.attr, + &dev_attr_lflag.attr, + &dev_attr_digi_flag.attr, + &dev_attr_rxcount.attr, + &dev_attr_txcount.attr, + &dev_attr_custom_name.attr, + NULL +}; + + +static struct attribute_group dgnc_tty_attribute_group = { + .name = NULL, + .attrs = dgnc_sysfs_tty_entries, +}; + + +void dgnc_create_tty_sysfs(struct un_t *un, struct device *c) +{ + int ret; + + ret = sysfs_create_group(&c->kobj, &dgnc_tty_attribute_group); + if (ret) { + printk(KERN_ERR "dgnc: failed to create sysfs tty device attributes.\n"); + sysfs_remove_group(&c->kobj, &dgnc_tty_attribute_group); + return; + } + + dev_set_drvdata(c, un); + +} + + +void dgnc_remove_tty_sysfs(struct device *c) +{ + sysfs_remove_group(&c->kobj, &dgnc_tty_attribute_group); +} + diff --git a/drivers/staging/dgnc/dgnc_sysfs.h b/drivers/staging/dgnc/dgnc_sysfs.h new file mode 100644 index 0000000..fe99110 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_sysfs.h @@ -0,0 +1,49 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +#ifndef __DGNC_SYSFS_H +#define __DGNC_SYSFS_H + +#include "dgnc_driver.h" + +#include <linux/device.h> + +struct board_t; +struct channel_t; +struct un_t; +struct pci_driver; +struct class_device; + +extern void dgnc_create_ports_sysfiles(struct board_t *bd); +extern void dgnc_remove_ports_sysfiles(struct board_t *bd); + +extern void dgnc_create_driver_sysfiles(struct pci_driver *); +extern void dgnc_remove_driver_sysfiles(struct pci_driver *); + +extern int dgnc_tty_class_init(void); +extern int dgnc_tty_class_destroy(void); + +extern void dgnc_create_tty_sysfs(struct un_t *un, struct device *c); +extern void dgnc_remove_tty_sysfs(struct device *c); + + + +#endif diff --git a/drivers/staging/dgnc/dgnc_trace.c b/drivers/staging/dgnc/dgnc_trace.c new file mode 100644 index 0000000..ea710e5 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_trace.c @@ -0,0 +1,187 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + * + */ + +/* $Id: dgnc_trace.c,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/vmalloc.h> + +#include "dgnc_driver.h" + +#define TRC_TO_CONSOLE 1 + +/* file level globals */ +static char *dgnc_trcbuf; /* the ringbuffer */ + +#if defined(TRC_TO_KMEM) +static int dgnc_trcbufi = 0; /* index of the tilde at the end of */ +#endif + +#if defined(TRC_TO_KMEM) +static DEFINE_SPINLOCK(dgnc_tracef_lock); +#endif + + +#if 0 + +#if !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) + +void dgnc_tracef(const char *fmt, ...) +{ + return; +} + +#else /* !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) */ + +void dgnc_tracef(const char *fmt, ...) +{ + va_list ap; + char buf[TRC_MAXMSG+1]; + size_t lenbuf; + int i; + static int failed = FALSE; +# if defined(TRC_TO_KMEM) + unsigned long flags; +#endif + + if(failed) + return; +# if defined(TRC_TO_KMEM) + DGNC_LOCK(dgnc_tracef_lock, flags); +#endif + + /* Format buf using fmt and arguments contained in ap. */ + va_start(ap, fmt); + i = vsprintf(buf, fmt, ap); + va_end(ap); + lenbuf = strlen(buf); + +# if defined(TRC_TO_KMEM) + { + static int initd=0; + + /* + * Now, in addition to (or instead of) printing this stuff out + * (which is a buffered operation), also tuck it away into a + * corner of memory which can be examined post-crash in kdb. + */ + if (!initd) { + dgnc_trcbuf = (char *) vmalloc(dgnc_trcbuf_size); + if(!dgnc_trcbuf) { + failed = TRUE; + printk("dgnc: tracing init failed!\n"); + return; + } + + memset(dgnc_trcbuf, '\0', dgnc_trcbuf_size); + dgnc_trcbufi = 0; + initd++; + + printk("dgnc: tracing enabled - " TRC_DTRC + " 0x%lx 0x%x\n", + (unsigned long)dgnc_trcbuf, + dgnc_trcbuf_size); + } + +# if defined(TRC_ON_OVERFLOW_WRAP_AROUND) + /* + * This is the less CPU-intensive way to do things. We simply + * wrap around before we fall off the end of the buffer. A + * tilde (~) demarcates the current end of the trace. + * + * This method should be used if you are concerned about race + * conditions as it is less likely to affect the timing of + * things. + */ + + if (dgnc_trcbufi + lenbuf >= dgnc_trcbuf_size) { + /* We are wrapping, so wipe out the last tilde. */ + dgnc_trcbuf[dgnc_trcbufi] = '\0'; + /* put the new string at the beginning of the buffer */ + dgnc_trcbufi = 0; + } + + strcpy(&dgnc_trcbuf[dgnc_trcbufi], buf); + dgnc_trcbufi += lenbuf; + dgnc_trcbuf[dgnc_trcbufi] = '~'; + +# elif defined(TRC_ON_OVERFLOW_SHIFT_BUFFER) + /* + * This is the more CPU-intensive way to do things. If we + * venture into the last 1/8 of the buffer, we shift the + * last 7/8 of the buffer forward, wiping out the first 1/8. + * Advantage: No wrap-around, only truncation from the + * beginning. + * + * This method should not be used if you are concerned about + * timing changes affecting the behaviour of the driver (ie, + * race conditions). + */ + strcpy(&dgnc_trcbuf[dgnc_trcbufi], buf); + dgnc_trcbufi += lenbuf; + dgnc_trcbuf[dgnc_trcbufi] = '~'; + dgnc_trcbuf[dgnc_trcbufi+1] = '\0'; + + /* If we're near the end of the trace buffer... */ + if (dgnc_trcbufi > (dgnc_trcbuf_size/8)*7) { + /* Wipe out the first eighth to make some more room. */ + strcpy(dgnc_trcbuf, &dgnc_trcbuf[dgnc_trcbuf_size/8]); + dgnc_trcbufi = strlen(dgnc_trcbuf)-1; + /* Plop overflow message at the top of the buffer. */ + bcopy(TRC_OVERFLOW, dgnc_trcbuf, strlen(TRC_OVERFLOW)); + } +# else +# error "TRC_ON_OVERFLOW_WRAP_AROUND or TRC_ON_OVERFLOW_SHIFT_BUFFER?" +# endif + } + DGNC_UNLOCK(dgnc_tracef_lock, flags); + +# endif /* defined(TRC_TO_KMEM) */ +} + +#endif /* !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) */ + +#endif + + +/* + * dgnc_tracer_free() + * + * + */ +void dgnc_tracer_free(void) +{ + if(dgnc_trcbuf) + vfree(dgnc_trcbuf); +} diff --git a/drivers/staging/dgnc/dgnc_trace.h b/drivers/staging/dgnc/dgnc_trace.h new file mode 100644 index 0000000..1e8870b --- /dev/null +++ b/drivers/staging/dgnc/dgnc_trace.h @@ -0,0 +1,45 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + * + ***************************************************************************** + * Header file for dgnc_trace.c + * + * $Id: dgnc_trace.h,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + */ + +#ifndef __DGNC_TRACE_H +#define __DGNC_TRACE_H + +#include "dgnc_driver.h" + +#if 0 + +# if !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) + void dgnc_tracef(const char *fmt, ...); +# else + void dgnc_tracef(const char *fmt, ...); +# endif + +#endif + +void dgnc_tracer_free(void); + +#endif + diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c new file mode 100644 index 0000000..461e881 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -0,0 +1,3648 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! + * + * This is shared code between Digi's CVS archive and the + * Linux Kernel sources. + * Changing the source just for reformatting needlessly breaks + * our CVS diff history. + * + * Send any bug fixes/changes to: Eng.Linux at digi dot com. + * Thank you. + */ + +/************************************************************************ + * + * This file implements the tty driver functionality for the + * Neo and ClassicBoard PCI based product lines. + * + ************************************************************************ + * + * $Id: dgnc_tty.c,v 1.5 2013/04/30 19:18:30 markh Exp $ + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/sched.h> /* For jiffies, task states */ +#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial_reg.h> +#include <linux/slab.h> +#include <linux/delay.h> /* For udelay */ +#include <asm/uaccess.h> /* For copy_from_user/copy_to_user */ +#include <linux/pci.h> + +#include "dgnc_driver.h" +#include "dgnc_tty.h" +#include "dgnc_types.h" +#include "dgnc_trace.h" +#include "dgnc_neo.h" +#include "dgnc_cls.h" +#include "dpacompat.h" +#include "dgnc_sysfs.h" + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37) +#define init_MUTEX(sem) sema_init(sem, 1) +#define DECLARE_MUTEX(name) \ + struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1) +#endif + +/* + * internal variables + */ +static struct board_t *dgnc_BoardsByMajor[256]; +static uchar *dgnc_TmpWriteBuf = NULL; +static DECLARE_MUTEX(dgnc_TmpWriteSem); + +/* + * Default transparent print information. + */ +static struct digi_t dgnc_digi_init = { + .digi_flags = DIGI_COOK, /* Flags */ + .digi_maxcps = 100, /* Max CPS */ + .digi_maxchar = 50, /* Max chars in print queue */ + .digi_bufsize = 100, /* Printer buffer size */ + .digi_onlen = 4, /* size of printer on string */ + .digi_offlen = 4, /* size of printer off string */ + .digi_onstr = "\033[5i", /* ANSI printer on string ] */ + .digi_offstr = "\033[4i", /* ANSI printer off string ] */ + .digi_term = "ansi" /* default terminal type */ +}; + + +/* + * Define a local default termios struct. All ports will be created + * with this termios initially. + * + * This defines a raw port at 9600 baud, 8 data bits, no parity, + * 1 stop bit. + */ +static struct ktermios DgncDefaultTermios = +{ + .c_iflag = (DEFAULT_IFLAGS), /* iflags */ + .c_oflag = (DEFAULT_OFLAGS), /* oflags */ + .c_cflag = (DEFAULT_CFLAGS), /* cflags */ + .c_lflag = (DEFAULT_LFLAGS), /* lflags */ + .c_cc = INIT_C_CC, + .c_line = 0, +}; + + +/* Our function prototypes */ +static int dgnc_tty_open(struct tty_struct *tty, struct file *file); +static void dgnc_tty_close(struct tty_struct *tty, struct file *file); +static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch); +static int dgnc_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); +static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo); +static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info); +static int dgnc_tty_write_room(struct tty_struct* tty); +static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c); +static int dgnc_tty_chars_in_buffer(struct tty_struct* tty); +static void dgnc_tty_start(struct tty_struct *tty); +static void dgnc_tty_stop(struct tty_struct *tty); +static void dgnc_tty_throttle(struct tty_struct *tty); +static void dgnc_tty_unthrottle(struct tty_struct *tty); +static void dgnc_tty_flush_chars(struct tty_struct *tty); +static void dgnc_tty_flush_buffer(struct tty_struct *tty); +static void dgnc_tty_hangup(struct tty_struct *tty); +static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value); +static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value); +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) +static int dgnc_tty_tiocmget(struct tty_struct *tty); +static int dgnc_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); +#else +static int dgnc_tty_tiocmget(struct tty_struct *tty, struct file *file); +static int dgnc_tty_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); +#endif +static int dgnc_tty_send_break(struct tty_struct *tty, int msec); +static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout); +static int dgnc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count); +static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios); +static void dgnc_tty_send_xchar(struct tty_struct *tty, char ch); + + +static const struct tty_operations dgnc_tty_ops = { + .open = dgnc_tty_open, + .close = dgnc_tty_close, + .write = dgnc_tty_write, + .write_room = dgnc_tty_write_room, + .flush_buffer = dgnc_tty_flush_buffer, + .chars_in_buffer = dgnc_tty_chars_in_buffer, + .flush_chars = dgnc_tty_flush_chars, + .ioctl = dgnc_tty_ioctl, + .set_termios = dgnc_tty_set_termios, + .stop = dgnc_tty_stop, + .start = dgnc_tty_start, + .throttle = dgnc_tty_throttle, + .unthrottle = dgnc_tty_unthrottle, + .hangup = dgnc_tty_hangup, + .put_char = dgnc_tty_put_char, + .tiocmget = dgnc_tty_tiocmget, + .tiocmset = dgnc_tty_tiocmset, + .break_ctl = dgnc_tty_send_break, + .wait_until_sent = dgnc_tty_wait_until_sent, + .send_xchar = dgnc_tty_send_xchar +}; + +/************************************************************************ + * + * TTY Initialization/Cleanup Functions + * + ************************************************************************/ + +/* + * dgnc_tty_preinit() + * + * Initialize any global tty related data before we download any boards. + */ +int dgnc_tty_preinit(void) +{ + /* + * Allocate a buffer for doing the copy from user space to + * kernel space in dgnc_write(). We only use one buffer and + * control access to it with a semaphore. If we are paging, we + * are already in trouble so one buffer won't hurt much anyway. + * + * We are okay to sleep in the malloc, as this routine + * is only called during module load, (not in interrupt context), + * and with no locks held. + */ + dgnc_TmpWriteBuf = kmalloc(WRITEBUFLEN, GFP_KERNEL); + + if (!dgnc_TmpWriteBuf) { + DPR_INIT(("unable to allocate tmp write buf")); + return (-ENOMEM); + } + + return(0); +} + + +/* + * dgnc_tty_register() + * + * Init the tty subsystem for this board. + */ +int dgnc_tty_register(struct board_t *brd) +{ + int rc = 0; + + DPR_INIT(("tty_register start\n")); + + memset(&brd->SerialDriver, 0, sizeof(struct tty_driver)); + memset(&brd->PrintDriver, 0, sizeof(struct tty_driver)); + + brd->SerialDriver.magic = TTY_DRIVER_MAGIC; + + snprintf(brd->SerialName, MAXTTYNAMELEN, "tty_dgnc_%d_", brd->boardnum); + + brd->SerialDriver.name = brd->SerialName; + brd->SerialDriver.name_base = 0; + brd->SerialDriver.major = 0; + brd->SerialDriver.minor_start = 0; + brd->SerialDriver.num = brd->maxports; + brd->SerialDriver.type = TTY_DRIVER_TYPE_SERIAL; + brd->SerialDriver.subtype = SERIAL_TYPE_NORMAL; + brd->SerialDriver.init_termios = DgncDefaultTermios; + brd->SerialDriver.driver_name = DRVSTR; + brd->SerialDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); + + /* + * The kernel wants space to store pointers to + * tty_struct's and termios's. + */ + brd->SerialDriver.ttys = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct tty_struct *), GFP_KERNEL); + if (!brd->SerialDriver.ttys) + return(-ENOMEM); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) + brd->SerialDriver.refcount = brd->TtyRefCnt; +#else + kref_init(&brd->SerialDriver.kref); +#endif + + brd->SerialDriver.termios = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct ktermios *), GFP_KERNEL); + if (!brd->SerialDriver.termios) + return(-ENOMEM); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,0,0) + brd->SerialDriver.termios_locked = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct ktermios *), GFP_KERNEL); + if (!brd->SerialDriver.termios_locked) + return(-ENOMEM); +#endif + /* + * Entry points for driver. Called by the kernel from + * tty_io.c and n_tty.c. + */ + tty_set_operations(&brd->SerialDriver, &dgnc_tty_ops); + + if (!brd->dgnc_Major_Serial_Registered) { + /* Register tty devices */ + rc = tty_register_driver(&brd->SerialDriver); + if (rc < 0) { + APR(("Can't register tty device (%d)\n", rc)); + return(rc); + } + brd->dgnc_Major_Serial_Registered = TRUE; + } + + /* + * If we're doing transparent print, we have to do all of the above + * again, seperately so we don't get the LD confused about what major + * we are when we get into the dgnc_tty_open() routine. + */ + brd->PrintDriver.magic = TTY_DRIVER_MAGIC; + snprintf(brd->PrintName, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum); + + brd->PrintDriver.name = brd->PrintName; + brd->PrintDriver.name_base = 0; + brd->PrintDriver.major = brd->SerialDriver.major; + brd->PrintDriver.minor_start = 0x80; + brd->PrintDriver.num = brd->maxports; + brd->PrintDriver.type = TTY_DRIVER_TYPE_SERIAL; + brd->PrintDriver.subtype = SERIAL_TYPE_NORMAL; + brd->PrintDriver.init_termios = DgncDefaultTermios; + brd->PrintDriver.driver_name = DRVSTR; + brd->PrintDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); + + /* + * The kernel wants space to store pointers to + * tty_struct's and termios's. Must be seperate from + * the Serial Driver so we don't get confused + */ + brd->PrintDriver.ttys = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct tty_struct *), GFP_KERNEL); + if (!brd->PrintDriver.ttys) + return(-ENOMEM); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) + brd->PrintDriver.refcount = brd->TtyRefCnt; +#else + kref_init(&brd->PrintDriver.kref); +#endif + + brd->PrintDriver.termios = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct ktermios *), GFP_KERNEL); + if (!brd->PrintDriver.termios) + return(-ENOMEM); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,0,0) + brd->PrintDriver.termios_locked = dgnc_driver_kzmalloc(brd->maxports * sizeof(struct ktermios *), GFP_KERNEL); + if (!brd->PrintDriver.termios_locked) + return(-ENOMEM); +#endif + + /* + * Entry points for driver. Called by the kernel from + * tty_io.c and n_tty.c. + */ + tty_set_operations(&brd->PrintDriver, &dgnc_tty_ops); + + if (!brd->dgnc_Major_TransparentPrint_Registered) { + /* Register Transparent Print devices */ + rc = tty_register_driver(&brd->PrintDriver); + if (rc < 0) { + APR(("Can't register Transparent Print device (%d)\n", rc)); + return(rc); + } + brd->dgnc_Major_TransparentPrint_Registered = TRUE; + } + + dgnc_BoardsByMajor[brd->SerialDriver.major] = brd; + brd->dgnc_Serial_Major = brd->SerialDriver.major; + brd->dgnc_TransparentPrint_Major = brd->PrintDriver.major; + + DPR_INIT(("DGNC REGISTER TTY: MAJOR: %d\n", brd->SerialDriver.major)); + + return (rc); +} + + +/* + * dgnc_tty_init() + * + * Init the tty subsystem. Called once per board after board has been + * downloaded and init'ed. + */ +int dgnc_tty_init(struct board_t *brd) +{ + int i; + uchar *vaddr; + struct channel_t *ch; + + if (!brd) + return (-ENXIO); + + DPR_INIT(("dgnc_tty_init start\n")); + + /* + * Initialize board structure elements. + */ + + vaddr = brd->re_map_membase; + + brd->nasync = brd->maxports; + + /* + * Allocate channel memory that might not have been allocated + * when the driver was first loaded. + */ + for (i = 0; i < brd->nasync; i++) { + if (!brd->channels[i]) { + + /* + * Okay to malloc with GFP_KERNEL, we are not at + * interrupt context, and there are no locks held. + */ + brd->channels[i] = dgnc_driver_kzmalloc(sizeof(struct channel_t), GFP_KERNEL); + if (!brd->channels[i]) { + DPR_CORE(("%s:%d Unable to allocate memory for channel struct\n", + __FILE__, __LINE__)); + } + } + } + + ch = brd->channels[0]; + vaddr = brd->re_map_membase; + + /* Set up channel variables */ + for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { + + if (!brd->channels[i]) + continue; + + DGNC_SPINLOCK_INIT(ch->ch_lock); + + /* Store all our magic numbers */ + ch->magic = DGNC_CHANNEL_MAGIC; + ch->ch_tun.magic = DGNC_UNIT_MAGIC; + ch->ch_tun.un_ch = ch; + ch->ch_tun.un_type = DGNC_SERIAL; + ch->ch_tun.un_dev = i; + + ch->ch_pun.magic = DGNC_UNIT_MAGIC; + ch->ch_pun.un_ch = ch; + ch->ch_pun.un_type = DGNC_PRINT; + ch->ch_pun.un_dev = i + 128; + + if (brd->bd_uart_offset == 0x200) + ch->ch_neo_uart = (struct neo_uart_struct *) ((ulong) vaddr + (brd->bd_uart_offset * i)); + else + ch->ch_cls_uart = (struct cls_uart_struct *) ((ulong) vaddr + (brd->bd_uart_offset * i)); + + ch->ch_bd = brd; + ch->ch_portnum = i; + ch->ch_digi = dgnc_digi_init; + + /* .25 second delay */ + ch->ch_close_delay = 250; + + init_waitqueue_head(&ch->ch_flags_wait); + init_waitqueue_head(&ch->ch_tun.un_flags_wait); + init_waitqueue_head(&ch->ch_pun.un_flags_wait); + init_waitqueue_head(&ch->ch_sniff_wait); + + { + struct device *classp; + classp = tty_register_device(&brd->SerialDriver, i, + &(ch->ch_bd->pdev->dev)); + ch->ch_tun.un_sysfs = classp; + dgnc_create_tty_sysfs(&ch->ch_tun, classp); + + classp = tty_register_device(&brd->PrintDriver, i, + &(ch->ch_bd->pdev->dev)); + ch->ch_pun.un_sysfs = classp; + dgnc_create_tty_sysfs(&ch->ch_pun, classp); + } + + } + + DPR_INIT(("dgnc_tty_init finish\n")); + + return (0); +} + + +/* + * dgnc_tty_post_uninit() + * + * UnInitialize any global tty related data. + */ +void dgnc_tty_post_uninit(void) +{ + if (dgnc_TmpWriteBuf) { + kfree(dgnc_TmpWriteBuf); + dgnc_TmpWriteBuf = NULL; + } +} + + +/* + * dgnc_tty_uninit() + * + * Uninitialize the TTY portion of this driver. Free all memory and + * resources. + */ +void dgnc_tty_uninit(struct board_t *brd) +{ + int i = 0; + + if (brd->dgnc_Major_Serial_Registered) { + dgnc_BoardsByMajor[brd->SerialDriver.major] = NULL; + brd->dgnc_Serial_Major = 0; + for (i = 0; i < brd->nasync; i++) { + dgnc_remove_tty_sysfs(brd->channels[i]->ch_tun.un_sysfs); + tty_unregister_device(&brd->SerialDriver, i); + } + tty_unregister_driver(&brd->SerialDriver); + brd->dgnc_Major_Serial_Registered = FALSE; + } + + if (brd->dgnc_Major_TransparentPrint_Registered) { + dgnc_BoardsByMajor[brd->PrintDriver.major] = NULL; + brd->dgnc_TransparentPrint_Major = 0; + for (i = 0; i < brd->nasync; i++) { + dgnc_remove_tty_sysfs(brd->channels[i]->ch_pun.un_sysfs); + tty_unregister_device(&brd->PrintDriver, i); + } + tty_unregister_driver(&brd->PrintDriver); + brd->dgnc_Major_TransparentPrint_Registered = FALSE; + } + + if (brd->SerialDriver.ttys) { + kfree(brd->SerialDriver.ttys); + brd->SerialDriver.ttys = NULL; + } + if (brd->PrintDriver.ttys) { + kfree(brd->PrintDriver.ttys); + brd->PrintDriver.ttys = NULL; + } +} + + +#define TMPBUFLEN (1024) + +/* + * dgnc_sniff - Dump data out to the "sniff" buffer if the + * proc sniff file is opened... + */ +void dgnc_sniff_nowait_nolock(struct channel_t *ch, uchar *text, uchar *buf, int len) +{ + struct timeval tv; + int n; + int r; + int nbuf; + int i; + int tmpbuflen; + char tmpbuf[TMPBUFLEN]; + char *p = tmpbuf; + int too_much_data; + + /* Leave if sniff not open */ + if (!(ch->ch_sniff_flags & SNIFF_OPEN)) + return; + + do_gettimeofday(&tv); + + /* Create our header for data dump */ + p += sprintf(p, "<%ld %ld><%s><", tv.tv_sec, tv.tv_usec, text); + tmpbuflen = p - tmpbuf; + + do { + too_much_data = 0; + + for (i = 0; i < len && tmpbuflen < (TMPBUFLEN - 4); i++) { + p += sprintf(p, "%02x ", *buf); + buf++; + tmpbuflen = p - tmpbuf; + } + + if (tmpbuflen < (TMPBUFLEN - 4)) { + if (i > 0) + p += sprintf(p - 1, "%s\n", ">"); + else + p += sprintf(p, "%s\n", ">"); + } else { + too_much_data = 1; + len -= i; + } + + nbuf = strlen(tmpbuf); + p = tmpbuf; + + /* + * Loop while data remains. + */ + while (nbuf > 0 && ch->ch_sniff_buf != 0) { + /* + * Determine the amount of available space left in the + * buffer. If there's none, wait until some appears. + */ + n = (ch->ch_sniff_out - ch->ch_sniff_in - 1) & SNIFF_MASK; + + /* + * If there is no space left to write to in our sniff buffer, + * we have no choice but to drop the data. + * We *cannot* sleep here waiting for space, because this + * function was probably called by the interrupt/timer routines! + */ + if (n == 0) { + return; + } + + /* + * Copy as much data as will fit. + */ + + if (n > nbuf) + n = nbuf; + + r = SNIFF_MAX - ch->ch_sniff_in; + + if (r <= n) { + memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, r); + + n -= r; + ch->ch_sniff_in = 0; + p += r; + nbuf -= r; + } + + memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, n); + + ch->ch_sniff_in += n; + p += n; + nbuf -= n; + + /* + * Wakeup any thread waiting for data + */ + if (ch->ch_sniff_flags & SNIFF_WAIT_DATA) { + ch->ch_sniff_flags &= ~SNIFF_WAIT_DATA; + wake_up_interruptible(&ch->ch_sniff_wait); + } + } + + /* + * If the user sent us too much data to push into our tmpbuf, + * we need to keep looping around on all the data. + */ + if (too_much_data) { + p = tmpbuf; + tmpbuflen = 0; + } + + } while (too_much_data); +} + + +/*======================================================================= + * + * dgnc_wmove - Write data to transmit queue. + * + * ch - Pointer to channel structure. + * buf - Poiter to characters to be moved. + * n - Number of characters to move. + * + *=======================================================================*/ +static void dgnc_wmove(struct channel_t *ch, char *buf, uint n) +{ + int remain; + uint head; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + head = ch->ch_w_head & WQUEUEMASK; + + /* + * If the write wraps over the top of the circular buffer, + * move the portion up to the wrap point, and reset the + * pointers to the bottom. + */ + remain = WQUEUESIZE - head; + + if (n >= remain) { + n -= remain; + memcpy(ch->ch_wqueue + head, buf, remain); + head = 0; + buf += remain; + } + + if (n > 0) { + /* + * Move rest of data. + */ + remain = n; + memcpy(ch->ch_wqueue + head, buf, remain); + head += remain; + } + + head &= WQUEUEMASK; + ch->ch_w_head = head; +} + + + + +/*======================================================================= + * + * dgnc_input - Process received data. + * + * ch - Pointer to channel structure. + * + *=======================================================================*/ +void dgnc_input(struct channel_t *ch) +{ + struct board_t *bd; + struct tty_struct *tp; + struct tty_ldisc *ld; + uint rmask; + ushort head; + ushort tail; + int data_len; + ulong lock_flags; + int flip_len; + int len = 0; + int n = 0; + char *buf = NULL; + int s = 0; + int i = 0; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + tp = ch->ch_tun.un_tty; + + bd = ch->ch_bd; + if(!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* + * Figure the number of characters in the buffer. + * Exit immediately if none. + */ + rmask = RQUEUEMASK; + head = ch->ch_r_head & rmask; + tail = ch->ch_r_tail & rmask; + data_len = (head - tail) & rmask; + + if (data_len == 0) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + DPR_READ(("dgnc_input start\n")); + + /* + * If the device is not open, or CREAD is off, + * flush input data and return immediately. + */ + if (!tp || (tp->magic != TTY_MAGIC) || !(ch->ch_tun.un_flags & UN_ISOPEN) || + !(tp->termios->c_cflag & CREAD) || (ch->ch_tun.un_flags & UN_CLOSING)) { + + DPR_READ(("input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum)); + DPR_READ(("input. tp: %p tp->magic: %x MAGIC:%x ch flags: %x\n", + tp, tp ? tp->magic : 0, TTY_MAGIC, ch->ch_tun.un_flags)); + + ch->ch_r_head = tail; + + /* Force queue flow control to be released, if needed */ + dgnc_check_queue_flow_control(ch); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* + * If we are throttled, simply don't read any data. + */ + if (ch->ch_flags & CH_FORCED_STOPI) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + DPR_READ(("Port %d throttled, not reading any data. head: %x tail: %x\n", + ch->ch_portnum, head, tail)); + return; + } + + DPR_READ(("dgnc_input start 2\n")); + + /* Decide how much data we can send into the tty layer */ + if (dgnc_rawreadok && tp->real_raw) + flip_len = MYFLIPLEN; + else + flip_len = TTY_FLIPBUF_SIZE; + + /* Chop down the length, if needed */ + len = min(data_len, flip_len); + len = min(len, (N_TTY_BUF_SIZE - 1) - tp->read_cnt); + + ld = tty_ldisc_ref(tp); + +#ifdef TTY_DONT_FLIP + /* + * If the DONT_FLIP flag is on, don't flush our buffer, and act + * like the ld doesn't have any space to put the data right now. + */ + if (test_bit(TTY_DONT_FLIP, &tp->flags)) + len = 0; +#endif + + /* + * If we were unable to get a reference to the ld, + * don't flush our buffer, and act like the ld doesn't + * have any space to put the data right now. + */ + if (!ld) { + len = 0; + } else { + /* + * If ld doesn't have a pointer to a receive_buf function, + * flush the data, then act like the ld doesn't have any + * space to put the data right now. + */ + if (!ld->ops->receive_buf) { + ch->ch_r_head = ch->ch_r_tail; + len = 0; + } + } + + if (len <= 0) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + if (ld) + tty_ldisc_deref(ld); + return; + } + + /* + * The tty layer in the kernel has changed in 2.6.16+. + * + * The flip buffers in the tty structure are no longer exposed, + * and probably will be going away eventually. + * + * If we are completely raw, we don't need to go through a lot + * of the tty layers that exist. + * In this case, we take the shortest and fastest route we + * can to relay the data to the user. + * + * On the other hand, if we are not raw, we need to go through + * the new 2.6.16+ tty layer, which has its API more well defined. + */ + if (dgnc_rawreadok && tp->real_raw) { + + if (ch->ch_flags & CH_FLIPBUF_IN_USE) { + DPR_READ(("DGNC - FLIPBUF in use. delaying input\n")); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + if (ld) + tty_ldisc_deref(ld); + return; + } + + ch->ch_flags |= CH_FLIPBUF_IN_USE; + buf = ch->ch_bd->flipbuf; + + n = len; + + /* + * n now contains the most amount of data we can copy, + * bounded either by the flip buffer size or the amount + * of data the card actually has pending... + */ + while (n) { + s = ((head >= tail) ? head : RQUEUESIZE) - tail; + s = min(s, n); + + if (s <= 0) + break; + + memcpy(buf, ch->ch_rqueue + tail, s); + dgnc_sniff_nowait_nolock(ch, "USER READ", ch->ch_rqueue + tail, s); + + tail += s; + buf += s; + + n -= s; + /* Flip queue if needed */ + tail &= rmask; + } + + ch->ch_r_tail = tail & rmask; + ch->ch_e_tail = tail & rmask; + + dgnc_check_queue_flow_control(ch); + + /* !!! WE *MUST* LET GO OF ALL LOCKS BEFORE CALLING RECEIVE BUF !!! */ + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_READ(("dgnc_input. %d real_raw len:%d calling receive_buf for buffer for board %d\n", + __LINE__, len, ch->ch_bd->boardnum)); + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) + tp->ldisc->ops->receive_buf(tp, ch->ch_bd->flipbuf, NULL, len); +#else + tp->ldisc.ops->receive_buf(tp, ch->ch_bd->flipbuf, NULL, len); +#endif + + /* Allow use of channel flip buffer again */ + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_flags &= ~CH_FLIPBUF_IN_USE; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + } + else { + len = tty_buffer_request_room(tp, len); + n = len; + + /* + * n now contains the most amount of data we can copy, + * bounded either by how much the Linux tty layer can handle, + * or the amount of data the card actually has pending... + */ + while (n) { + s = ((head >= tail) ? head : RQUEUESIZE) - tail; + s = min(s, n); + + if (s <= 0) + break; + + /* + * If conditions are such that ld needs to see all + * UART errors, we will have to walk each character + * and error byte and send them to the buffer one at + * a time. + */ + if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { + for (i = 0; i < s; i++) { + if (*(ch->ch_equeue + tail + i) & UART_LSR_BI) + tty_insert_flip_char(tp, *(ch->ch_rqueue + tail + i), TTY_BREAK); + else if (*(ch->ch_equeue + tail + i) & UART_LSR_PE) + tty_insert_flip_char(tp, *(ch->ch_rqueue + tail + i), TTY_PARITY); + else if (*(ch->ch_equeue + tail + i) & UART_LSR_FE) + tty_insert_flip_char(tp, *(ch->ch_rqueue + tail + i), TTY_FRAME); + else + tty_insert_flip_char(tp, *(ch->ch_rqueue + tail + i), TTY_NORMAL); + } + } + else { + tty_insert_flip_string(tp, ch->ch_rqueue + tail, s); + } + + dgnc_sniff_nowait_nolock(ch, "USER READ", ch->ch_rqueue + tail, s); + + tail += s; + n -= s; + /* Flip queue if needed */ + tail &= rmask; + } + + ch->ch_r_tail = tail & rmask; + ch->ch_e_tail = tail & rmask; + dgnc_check_queue_flow_control(ch); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* Tell the tty layer its okay to "eat" the data now */ + tty_flip_buffer_push(tp); + } + + if (ld) + tty_ldisc_deref(ld); + + DPR_READ(("dgnc_input - finish\n")); +} + + +/************************************************************************ + * Determines when CARRIER changes state and takes appropriate + * action. + ************************************************************************/ +void dgnc_carrier(struct channel_t *ch) +{ + struct board_t *bd; + + int virt_carrier = 0; + int phys_carrier = 0; + + DPR_CARR(("dgnc_carrier called...\n")); + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + if (ch->ch_mistat & UART_MSR_DCD) { + DPR_CARR(("mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD)); + phys_carrier = 1; + } + + if (ch->ch_digi.digi_flags & DIGI_FORCEDCD) { + virt_carrier = 1; + } + + if (ch->ch_c_cflag & CLOCAL) { + virt_carrier = 1; + } + + + DPR_CARR(("DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier)); + + /* + * Test for a VIRTUAL carrier transition to HIGH. + */ + if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) { + + /* + * When carrier rises, wake any threads waiting + * for carrier in the open routine. + */ + + DPR_CARR(("carrier: virt DCD rose\n")); + + if (waitqueue_active(&(ch->ch_flags_wait))) + wake_up_interruptible(&ch->ch_flags_wait); + } + + /* + * Test for a PHYSICAL carrier transition to HIGH. + */ + if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) { + + /* + * When carrier rises, wake any threads waiting + * for carrier in the open routine. + */ + + DPR_CARR(("carrier: physical DCD rose\n")); + + if (waitqueue_active(&(ch->ch_flags_wait))) + wake_up_interruptible(&ch->ch_flags_wait); + } + + /* + * Test for a PHYSICAL transition to low, so long as we aren't + * currently ignoring physical transitions (which is what "virtual + * carrier" indicates). + * + * The transition of the virtual carrier to low really doesn't + * matter... it really only means "ignore carrier state", not + * "make pretend that carrier is there". + */ + if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) && + (phys_carrier == 0)) + { + + /* + * When carrier drops: + * + * Drop carrier on all open units. + * + * Flush queues, waking up any task waiting in the + * line discipline. + * + * Send a hangup to the control terminal. + * + * Enable all select calls. + */ + if (waitqueue_active(&(ch->ch_flags_wait))) + wake_up_interruptible(&ch->ch_flags_wait); + + if (ch->ch_tun.un_open_count > 0) { + DPR_CARR(("Sending tty hangup\n")); + tty_hangup(ch->ch_tun.un_tty); + } + + if (ch->ch_pun.un_open_count > 0) { + DPR_CARR(("Sending pr hangup\n")); + tty_hangup(ch->ch_pun.un_tty); + } + } + + /* + * Make sure that our cached values reflect the current reality. + */ + if (virt_carrier == 1) + ch->ch_flags |= CH_FCAR; + else + ch->ch_flags &= ~CH_FCAR; + + if (phys_carrier == 1) + ch->ch_flags |= CH_CD; + else + ch->ch_flags &= ~CH_CD; +} + +/* + * Assign the custom baud rate to the channel structure + */ +static void dgnc_set_custom_speed(struct channel_t *ch, uint newrate) +{ + int testdiv; + int testrate_high; + int testrate_low; + int deltahigh; + int deltalow; + + if (newrate < 0) + newrate = 0; + + /* + * Since the divisor is stored in a 16-bit integer, we make sure + * we don't allow any rates smaller than a 16-bit integer would allow. + * And of course, rates above the dividend won't fly. + */ + if (newrate && newrate < ((ch->ch_bd->bd_dividend / 0xFFFF) + 1)) + newrate = ((ch->ch_bd->bd_dividend / 0xFFFF) + 1); + + if (newrate && newrate > ch->ch_bd->bd_dividend) + newrate = ch->ch_bd->bd_dividend; + + while (newrate > 0) { + testdiv = ch->ch_bd->bd_dividend / newrate; + + /* + * If we try to figure out what rate the board would use + * with the test divisor, it will be either equal or higher + * than the requested baud rate. If we then determine the + * rate with a divisor one higher, we will get the next lower + * supported rate below the requested. + */ + testrate_high = ch->ch_bd->bd_dividend / testdiv; + testrate_low = ch->ch_bd->bd_dividend / (testdiv + 1); + + /* + * If the rate for the requested divisor is correct, just + * use it and be done. + */ + if (testrate_high == newrate ) + break; + + /* + * Otherwise, pick the rate that is closer (i.e. whichever rate + * has a smaller delta). + */ + deltahigh = testrate_high - newrate; + deltalow = newrate - testrate_low; + + if (deltahigh < deltalow) { + newrate = testrate_high; + } else { + newrate = testrate_low; + } + + break; + } + + ch->ch_custom_speed = newrate; + + return; +} + + +void dgnc_check_queue_flow_control(struct channel_t *ch) +{ + int qleft = 0; + + /* Store how much space we have left in the queue */ + if ((qleft = ch->ch_r_tail - ch->ch_r_head - 1) < 0) + qleft += RQUEUEMASK + 1; + + /* + * Check to see if we should enforce flow control on our queue because + * the ld (or user) isn't reading data out of our queue fast enuf. + * + * NOTE: This is done based on what the current flow control of the + * port is set for. + * + * 1) HWFLOW (RTS) - Turn off the UART's Receive interrupt. + * This will cause the UART's FIFO to back up, and force + * the RTS signal to be dropped. + * 2) SWFLOW (IXOFF) - Keep trying to send a stop character to + * the other side, in hopes it will stop sending data to us. + * 3) NONE - Nothing we can do. We will simply drop any extra data + * that gets sent into us when the queue fills up. + */ + if (qleft < 256) { + /* HWFLOW */ + if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) { + if(!(ch->ch_flags & CH_RECEIVER_OFF)) { + ch->ch_bd->bd_ops->disable_receiver(ch); + ch->ch_flags |= (CH_RECEIVER_OFF); + DPR_READ(("Internal queue hit hilevel mark (%d)! Turning off interrupts.\n", + qleft)); + } + } + /* SWFLOW */ + else if (ch->ch_c_iflag & IXOFF) { + if (ch->ch_stops_sent <= MAX_STOPS_SENT) { + ch->ch_bd->bd_ops->send_stop_character(ch); + ch->ch_stops_sent++; + DPR_READ(("Sending stop char! Times sent: %x\n", ch->ch_stops_sent)); + } + } + /* No FLOW */ + else { + /* Empty... Can't do anything about the impending overflow... */ + } + } + + /* + * Check to see if we should unenforce flow control because + * ld (or user) finally read enuf data out of our queue. + * + * NOTE: This is done based on what the current flow control of the + * port is set for. + * + * 1) HWFLOW (RTS) - Turn back on the UART's Receive interrupt. + * This will cause the UART's FIFO to raise RTS back up, + * which will allow the other side to start sending data again. + * 2) SWFLOW (IXOFF) - Send a start character to + * the other side, so it will start sending data to us again. + * 3) NONE - Do nothing. Since we didn't do anything to turn off the + * other side, we don't need to do anything now. + */ + if (qleft > (RQUEUESIZE / 2)) { + /* HWFLOW */ + if (ch->ch_digi.digi_flags & RTSPACE || ch->ch_c_cflag & CRTSCTS) { + if (ch->ch_flags & CH_RECEIVER_OFF) { + ch->ch_bd->bd_ops->enable_receiver(ch); + ch->ch_flags &= ~(CH_RECEIVER_OFF); + DPR_READ(("Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n", + qleft)); + } + } + /* SWFLOW */ + else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) { + ch->ch_stops_sent = 0; + ch->ch_bd->bd_ops->send_start_character(ch); + DPR_READ(("Sending start char!\n")); + } + /* No FLOW */ + else { + /* Nothing needed. */ + } + } +} + + +void dgnc_wakeup_writes(struct channel_t *ch) +{ + int qlen = 0; + ulong lock_flags; + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* + * If channel now has space, wake up anyone waiting on the condition. + */ + if ((qlen = ch->ch_w_head - ch->ch_w_tail) < 0) + qlen += WQUEUESIZE; + + if (qlen >= (WQUEUESIZE - 256)) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + if (ch->ch_tun.un_flags & UN_ISOPEN) { +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) + if ((ch->ch_tun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + ch->ch_tun.un_tty->ldisc->ops->write_wakeup) + { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + (ch->ch_tun.un_tty->ldisc->ops->write_wakeup)(ch->ch_tun.un_tty); + DGNC_LOCK(ch->ch_lock, lock_flags); + } +#else + if ((ch->ch_tun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + ch->ch_tun.un_tty->ldisc.ops->write_wakeup) + { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + (ch->ch_tun.un_tty->ldisc.ops->write_wakeup)(ch->ch_tun.un_tty); + DGNC_LOCK(ch->ch_lock, lock_flags); + } +#endif + + wake_up_interruptible(&ch->ch_tun.un_tty->write_wait); + + /* + * If unit is set to wait until empty, check to make sure + * the queue AND FIFO are both empty. + */ + if (ch->ch_tun.un_flags & UN_EMPTY) { + if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { + ch->ch_tun.un_flags &= ~(UN_EMPTY); + + /* + * If RTS Toggle mode is on, whenever + * the queue and UART is empty, keep RTS low. + */ + if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { + ch->ch_mostat &= ~(UART_MCR_RTS); + ch->ch_bd->bd_ops->assert_modem_signals(ch); + } + + /* + * If DTR Toggle mode is on, whenever + * the queue and UART is empty, keep DTR low. + */ + if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { + ch->ch_mostat &= ~(UART_MCR_DTR); + ch->ch_bd->bd_ops->assert_modem_signals(ch); + } + } + } + + wake_up_interruptible(&ch->ch_tun.un_flags_wait); + } + + if (ch->ch_pun.un_flags & UN_ISOPEN) { +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) + if ((ch->ch_pun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + ch->ch_pun.un_tty->ldisc->ops->write_wakeup) + { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + (ch->ch_pun.un_tty->ldisc->ops->write_wakeup)(ch->ch_pun.un_tty); + DGNC_LOCK(ch->ch_lock, lock_flags); + } +#else + if ((ch->ch_pun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && + ch->ch_pun.un_tty->ldisc.ops->write_wakeup) + { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + (ch->ch_pun.un_tty->ldisc.ops->write_wakeup)(ch->ch_pun.un_tty); + DGNC_LOCK(ch->ch_lock, lock_flags); + } +#endif + + wake_up_interruptible(&ch->ch_pun.un_tty->write_wait); + + /* + * If unit is set to wait until empty, check to make sure + * the queue AND FIFO are both empty. + */ + if (ch->ch_pun.un_flags & UN_EMPTY) { + if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { + ch->ch_pun.un_flags &= ~(UN_EMPTY); + } + } + + wake_up_interruptible(&ch->ch_pun.un_flags_wait); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + + +/************************************************************************ + * + * TTY Entry points and helper functions + * + ************************************************************************/ + +/* + * dgnc_tty_open() + * + */ +static int dgnc_tty_open(struct tty_struct *tty, struct file *file) +{ + struct board_t *brd; + struct channel_t *ch; + struct un_t *un; + uint major = 0; + uint minor = 0; + int rc = 0; + ulong lock_flags; + + rc = 0; + + major = MAJOR(tty_devnum(tty)); + minor = MINOR(tty_devnum(tty)); + + if (major > 255) { + return -ENXIO; + } + + /* Get board pointer from our array of majors we have allocated */ + brd = dgnc_BoardsByMajor[major]; + if (!brd) { + return -ENXIO; + } + + /* + * If board is not yet up to a state of READY, go to + * sleep waiting for it to happen or they cancel the open. + */ + rc = wait_event_interruptible(brd->state_wait, + (brd->state & BOARD_READY)); + + if (rc) { + return rc; + } + + DGNC_LOCK(brd->bd_lock, lock_flags); + + /* If opened device is greater than our number of ports, bail. */ + if (PORT_NUM(minor) > brd->nasync) { + DGNC_UNLOCK(brd->bd_lock, lock_flags); + return -ENXIO; + } + + ch = brd->channels[PORT_NUM(minor)]; + if (!ch) { + DGNC_UNLOCK(brd->bd_lock, lock_flags); + return -ENXIO; + } + + /* Drop board lock */ + DGNC_UNLOCK(brd->bd_lock, lock_flags); + + /* Grab channel lock */ + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Figure out our type */ + if (!IS_PRINT(minor)) { + un = &brd->channels[PORT_NUM(minor)]->ch_tun; + un->un_type = DGNC_SERIAL; + } + else if (IS_PRINT(minor)) { + un = &brd->channels[PORT_NUM(minor)]->ch_pun; + un->un_type = DGNC_PRINT; + } + else { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + DPR_OPEN(("%d Unknown TYPE!\n", __LINE__)); + return -ENXIO; + } + + /* + * If the port is still in a previous open, and in a state + * where we simply cannot safely keep going, wait until the + * state clears. + */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + rc = wait_event_interruptible(ch->ch_flags_wait, ((ch->ch_flags & CH_OPENING) == 0)); + + /* If ret is non-zero, user ctrl-c'ed us */ + if (rc) { + DPR_OPEN(("%d User ctrl c'ed\n", __LINE__)); + return -EINTR; + } + + /* + * If either unit is in the middle of the fragile part of close, + * we just cannot touch the channel safely. + * Go to sleep, knowing that when the channel can be + * touched safely, the close routine will signal the + * ch_flags_wait to wake us back up. + */ + rc = wait_event_interruptible(ch->ch_flags_wait, + (((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING) == 0)); + + /* If ret is non-zero, user ctrl-c'ed us */ + if (rc) { + DPR_OPEN(("%d User ctrl c'ed\n", __LINE__)); + return -EINTR; + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + + /* Store our unit into driver_data, so we always have it available. */ + tty->driver_data = un; + + DPR_OPEN(("Open called. MAJOR: %d MINOR:%d PORT_NUM: %x unit: %p NAME: %s\n", + MAJOR(tty_devnum(tty)), MINOR(tty_devnum(tty)), PORT_NUM(minor), un, brd->name)); + + DPR_OPEN(("%d: tflag=%x pflag=%x\n", __LINE__, ch->ch_tun.un_flags, ch->ch_pun.un_flags)); + + /* + * Initialize tty's + */ + if (!(un->un_flags & UN_ISOPEN)) { + /* Store important variables. */ + un->un_tty = tty; + + /* Maybe do something here to the TTY struct as well? */ + } + + + /* + * Allocate channel buffers for read/write/error. + * Set flag, so we don't get trounced on. + */ + ch->ch_flags |= (CH_OPENING); + + /* Drop locks, as malloc with GFP_KERNEL can sleep */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (!ch->ch_rqueue) + ch->ch_rqueue = dgnc_driver_kzmalloc(RQUEUESIZE, GFP_KERNEL); + if (!ch->ch_equeue) + ch->ch_equeue = dgnc_driver_kzmalloc(EQUEUESIZE, GFP_KERNEL); + if (!ch->ch_wqueue) + ch->ch_wqueue = dgnc_driver_kzmalloc(WQUEUESIZE, GFP_KERNEL); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags &= ~(CH_OPENING); + wake_up_interruptible(&ch->ch_flags_wait); + + /* + * Initialize if neither terminal or printer is open. + */ + if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_ISOPEN)) { + + DPR_OPEN(("dgnc_open: initializing channel in open...\n")); + + /* + * Flush input queues. + */ + ch->ch_r_head = ch->ch_r_tail = 0; + ch->ch_e_head = ch->ch_e_tail = 0; + ch->ch_w_head = ch->ch_w_tail = 0; + + brd->bd_ops->flush_uart_write(ch); + brd->bd_ops->flush_uart_read(ch); + + ch->ch_flags = 0; + ch->ch_cached_lsr = 0; + ch->ch_stop_sending_break = 0; + ch->ch_stops_sent = 0; + + ch->ch_c_cflag = tty->termios->c_cflag; + ch->ch_c_iflag = tty->termios->c_iflag; + ch->ch_c_oflag = tty->termios->c_oflag; + ch->ch_c_lflag = tty->termios->c_lflag; + ch->ch_startc = tty->termios->c_cc[VSTART]; + ch->ch_stopc = tty->termios->c_cc[VSTOP]; + + /* + * Bring up RTS and DTR... + * Also handle RTS or DTR toggle if set. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + + /* Tell UART to init itself */ + brd->bd_ops->uart_init(ch); + } + + /* + * Run param in case we changed anything + */ + brd->bd_ops->param(tty); + + dgnc_carrier(ch); + + /* + * follow protocol for opening port + */ + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + rc = dgnc_block_til_ready(tty, file, ch); + + if (rc) { + DPR_OPEN(("dgnc_tty_open returning after dgnc_block_til_ready " + "with %d\n", rc)); + } + + /* No going back now, increment our unit and channel counters */ + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_open_count++; + un->un_open_count++; + un->un_flags |= (UN_ISOPEN); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_OPEN(("dgnc_tty_open finished\n")); + return (rc); +} + + +/* + * dgnc_block_til_ready() + * + * Wait for DCD, if needed. + */ +static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch) +{ + int retval = 0; + struct un_t *un = NULL; + ulong lock_flags; + uint old_flags = 0; + int sleep_on_un_flags = 0; + + if (!tty || tty->magic != TTY_MAGIC || !file || !ch || ch->magic != DGNC_CHANNEL_MAGIC) { + return (-ENXIO); + } + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) { + return (-ENXIO); + } + + DPR_OPEN(("dgnc_block_til_ready - before block.\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_wopen++; + + /* Loop forever */ + while (1) { + + sleep_on_un_flags = 0; + + /* + * If board has failed somehow during our sleep, bail with error. + */ + if (ch->ch_bd->state == BOARD_FAILED) { + retval = -ENXIO; + break; + } + + /* If tty was hung up, break out of loop and set error. */ + if (tty_hung_up_p(file)) { + retval = -EAGAIN; + break; + } + + /* + * If either unit is in the middle of the fragile part of close, + * we just cannot touch the channel safely. + * Go back to sleep, knowing that when the channel can be + * touched safely, the close routine will signal the + * ch_wait_flags to wake us back up. + */ + if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING)) { + + /* + * Our conditions to leave cleanly and happily: + * 1) NONBLOCKING on the tty is set. + * 2) CLOCAL is set. + * 3) DCD (fake or real) is active. + */ + + if (file->f_flags & O_NONBLOCK) { + break; + } + + if (tty->flags & (1 << TTY_IO_ERROR)) { + retval = -EIO; + break; + } + + if (ch->ch_flags & CH_CD) { + DPR_OPEN(("%d: ch_flags: %x\n", __LINE__, ch->ch_flags)); + break; + } + + if (ch->ch_flags & CH_FCAR) { + DPR_OPEN(("%d: ch_flags: %x\n", __LINE__, ch->ch_flags)); + break; + } + } + else { + sleep_on_un_flags = 1; + } + + /* + * If there is a signal pending, the user probably + * interrupted (ctrl-c) us. + * Leave loop with error set. + */ + if (signal_pending(current)) { + DPR_OPEN(("%d: signal pending...\n", __LINE__)); + retval = -ERESTARTSYS; + break; + } + + DPR_OPEN(("dgnc_block_til_ready - blocking.\n")); + + /* + * Store the flags before we let go of channel lock + */ + if (sleep_on_un_flags) + old_flags = ch->ch_tun.un_flags | ch->ch_pun.un_flags; + else + old_flags = ch->ch_flags; + + /* + * Let go of channel lock before calling schedule. + * Our poller will get any FEP events and wake us up when DCD + * eventually goes active. + */ + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_OPEN(("Going to sleep on %s flags...\n", + (sleep_on_un_flags ? "un" : "ch"))); + + /* + * Wait for something in the flags to change from the current value. + */ + if (sleep_on_un_flags) { + retval = wait_event_interruptible(un->un_flags_wait, + (old_flags != (ch->ch_tun.un_flags | ch->ch_pun.un_flags))); + } + else { + retval = wait_event_interruptible(ch->ch_flags_wait, + (old_flags != ch->ch_flags)); + } + + DPR_OPEN(("After sleep... retval: %x\n", retval)); + + /* + * We got woken up for some reason. + * Before looping around, grab our channel lock. + */ + DGNC_LOCK(ch->ch_lock, lock_flags); + } + + ch->ch_wopen--; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_OPEN(("dgnc_block_til_ready - after blocking.\n")); + + if (retval) { + DPR_OPEN(("dgnc_block_til_ready - done. error. retval: %x\n", retval)); + return(retval); + } + + DPR_OPEN(("dgnc_block_til_ready - done no error. jiffies: %lu\n", jiffies)); + + return(0); +} + + +/* + * dgnc_tty_hangup() + * + * Hangup the port. Like a close, but don't wait for output to drain. + */ +static void dgnc_tty_hangup(struct tty_struct *tty) +{ + struct un_t *un; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + DPR_CLOSE(("dgnc_hangup called. ch->ch_open_count: %d un->un_open_count: %d\n", + un->un_ch->ch_open_count, un->un_open_count)); + + /* flush the transmit queues */ + dgnc_tty_flush_buffer(tty); + + DPR_CLOSE(("dgnc_hangup finished. ch->ch_open_count: %d un->un_open_count: %d\n", + un->un_ch->ch_open_count, un->un_open_count)); +} + + +/* + * dgnc_tty_close() + * + */ +static void dgnc_tty_close(struct tty_struct *tty, struct file *file) +{ + struct ktermios *ts; + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + int rc = 0; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + ts = tty->termios; + + DPR_CLOSE(("Close called\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* + * Determine if this is the last close or not - and if we agree about + * which type of close it is with the Line Discipline + */ + if ((tty->count == 1) && (un->un_open_count != 1)) { + /* + * Uh, oh. tty->count is 1, which means that the tty + * structure will be freed. un_open_count should always + * be one in these conditions. If it's greater than + * one, we've got real problems, since it means the + * serial port won't be shutdown. + */ + APR(("tty->count is 1, un open count is %d\n", un->un_open_count)); + un->un_open_count = 1; + } + + if (--un->un_open_count < 0) { + APR(("bad serial port open count of %d\n", un->un_open_count)); + un->un_open_count = 0; + } + + ch->ch_open_count--; + + if (ch->ch_open_count && un->un_open_count) { + DPR_CLOSE(("dgnc_tty_close: not last close ch: %d un:%d\n", + ch->ch_open_count, un->un_open_count)); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return; + } + + /* OK, its the last close on the unit */ + DPR_CLOSE(("dgnc_tty_close - last close on unit procedures\n")); + + un->un_flags |= UN_CLOSING; + + tty->closing = 1; + + + /* + * Only officially close channel if count is 0 and + * DIGI_PRINTER bit is not set. + */ + if ((ch->ch_open_count == 0) && !(ch->ch_digi.digi_flags & DIGI_PRINTER)) { + + ch->ch_flags &= ~(CH_STOPI | CH_FORCED_STOPI); + + /* + * turn off print device when closing print device. + */ + if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON) ) { + dgnc_wmove(ch, ch->ch_digi.digi_offstr, + (int) ch->ch_digi.digi_offlen); + ch->ch_flags &= ~CH_PRON; + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + /* wait for output to drain */ + /* This will also return if we take an interrupt */ + + DPR_CLOSE(("Calling wait_for_drain\n")); + rc = bd->bd_ops->drain(tty, 0); + + DPR_CLOSE(("After calling wait_for_drain\n")); + + if (rc) { + DPR_BASIC(("dgnc_tty_close - bad return: %d ", rc)); + } + + dgnc_tty_flush_buffer(tty); + tty_ldisc_flush(tty); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + tty->closing = 0; + + /* + * If we have HUPCL set, lower DTR and RTS + */ + if (ch->ch_c_cflag & HUPCL) { + DPR_CLOSE(("Close. HUPCL set, dropping DTR/RTS\n")); + + /* Drop RTS/DTR */ + ch->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS); + bd->bd_ops->assert_modem_signals(ch); + + /* + * Go to sleep to ensure RTS/DTR + * have been dropped for modems to see it. + */ + if (ch->ch_close_delay) { + DPR_CLOSE(("Close. Sleeping for RTS/DTR drop\n")); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + dgnc_ms_sleep(ch->ch_close_delay); + DGNC_LOCK(ch->ch_lock, lock_flags); + + DPR_CLOSE(("Close. After sleeping for RTS/DTR drop\n")); + } + } + + ch->ch_old_baud = 0; + + /* Turn off UART interrupts for this port */ + ch->ch_bd->bd_ops->uart_off(ch); + } + else { + /* + * turn off print device when closing print device. + */ + if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON) ) { + dgnc_wmove(ch, ch->ch_digi.digi_offstr, + (int) ch->ch_digi.digi_offlen); + ch->ch_flags &= ~CH_PRON; + } + } + + un->un_tty = NULL; + un->un_flags &= ~(UN_ISOPEN | UN_CLOSING); + + DPR_CLOSE(("Close. Doing wakeups\n")); + wake_up_interruptible(&ch->ch_flags_wait); + wake_up_interruptible(&un->un_flags_wait); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_BASIC(("dgnc_tty_close - complete\n")); +} + + +/* + * dgnc_tty_chars_in_buffer() + * + * Return number of characters that have not been transmitted yet. + * + * This routine is used by the line discipline to determine if there + * is data waiting to be transmitted/drained/flushed or not. + */ +static int dgnc_tty_chars_in_buffer(struct tty_struct *tty) +{ + struct channel_t *ch = NULL; + struct un_t *un = NULL; + ushort thead; + ushort ttail; + uint tmask; + uint chars = 0; + ulong lock_flags = 0; + + if (tty == NULL) + return(0); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + tmask = WQUEUEMASK; + thead = ch->ch_w_head & tmask; + ttail = ch->ch_w_tail & tmask; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (ttail == thead) { + chars = 0; + } else { + if (thead >= ttail) + chars = thead - ttail; + else + chars = thead - ttail + WQUEUESIZE; + } + + DPR_WRITE(("dgnc_tty_chars_in_buffer. Port: %x - %d (head: %d tail: %d)\n", + ch->ch_portnum, chars, thead, ttail)); + + return(chars); +} + + +/* + * dgnc_maxcps_room + * + * Reduces bytes_available to the max number of characters + * that can be sent currently given the maxcps value, and + * returns the new bytes_available. This only affects printer + * output. + */ +static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available) +{ + struct channel_t *ch = NULL; + struct un_t *un = NULL; + + if (!tty) + return (bytes_available); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (bytes_available); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (bytes_available); + + /* + * If its not the Transparent print device, return + * the full data amount. + */ + if (un->un_type != DGNC_PRINT) + return (bytes_available); + + if (ch->ch_digi.digi_maxcps > 0 && ch->ch_digi.digi_bufsize > 0 ) { + int cps_limit = 0; + unsigned long current_time = jiffies; + unsigned long buffer_time = current_time + + (HZ * ch->ch_digi.digi_bufsize) / ch->ch_digi.digi_maxcps; + + if (ch->ch_cpstime < current_time) { + /* buffer is empty */ + ch->ch_cpstime = current_time; /* reset ch_cpstime */ + cps_limit = ch->ch_digi.digi_bufsize; + } + else if (ch->ch_cpstime < buffer_time) { + /* still room in the buffer */ + cps_limit = ((buffer_time - ch->ch_cpstime) * ch->ch_digi.digi_maxcps) / HZ; + } + else { + /* no room in the buffer */ + cps_limit = 0; + } + + bytes_available = min(cps_limit, bytes_available); + } + + return (bytes_available); +} + + +/* + * dgnc_tty_write_room() + * + * Return space available in Tx buffer + */ +static int dgnc_tty_write_room(struct tty_struct *tty) +{ + struct channel_t *ch = NULL; + struct un_t *un = NULL; + ushort head; + ushort tail; + ushort tmask; + int ret = 0; + ulong lock_flags = 0; + + if (tty == NULL || dgnc_TmpWriteBuf == NULL) + return(0); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (0); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (0); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + tmask = WQUEUEMASK; + head = (ch->ch_w_head) & tmask; + tail = (ch->ch_w_tail) & tmask; + + if ((ret = tail - head - 1) < 0) + ret += WQUEUESIZE; + + /* Limit printer to maxcps */ + ret = dgnc_maxcps_room(tty, ret); + + /* + * If we are printer device, leave space for + * possibly both the on and off strings. + */ + if (un->un_type == DGNC_PRINT) { + if (!(ch->ch_flags & CH_PRON)) + ret -= ch->ch_digi.digi_onlen; + ret -= ch->ch_digi.digi_offlen; + } + else { + if (ch->ch_flags & CH_PRON) + ret -= ch->ch_digi.digi_offlen; + } + + if (ret < 0) + ret = 0; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_WRITE(("dgnc_tty_write_room - %d tail: %d head: %d\n", ret, tail, head)); + + return(ret); +} + + +/* + * dgnc_tty_put_char() + * + * Put a character into ch->ch_buf + * + * - used by the line discipline for OPOST processing + */ +static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c) +{ + /* + * Simply call tty_write. + */ + DPR_WRITE(("dgnc_tty_put_char called\n")); + dgnc_tty_write(tty, &c, 1); + return 1; +} + + +/* + * dgnc_tty_write() + * + * Take data from the user or kernel and send it out to the FEP. + * In here exists all the Transparent Print magic as well. + */ +static int dgnc_tty_write(struct tty_struct *tty, + const unsigned char *buf, int count) +{ + struct channel_t *ch = NULL; + struct un_t *un = NULL; + int bufcount = 0, n = 0; + int orig_count = 0; + ulong lock_flags; + ushort head; + ushort tail; + ushort tmask; + uint remain; + int from_user = 0; + + if (tty == NULL || dgnc_TmpWriteBuf == NULL) + return(0); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return(0); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return(0); + + if (!count) + return(0); + + DPR_WRITE(("dgnc_tty_write: Port: %x tty=%p user=%d len=%d\n", + ch->ch_portnum, tty, from_user, count)); + + /* + * Store original amount of characters passed in. + * This helps to figure out if we should ask the FEP + * to send us an event when it has more space available. + */ + orig_count = count; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Get our space available for the channel from the board */ + tmask = WQUEUEMASK; + head = (ch->ch_w_head) & tmask; + tail = (ch->ch_w_tail) & tmask; + + if ((bufcount = tail - head - 1) < 0) + bufcount += WQUEUESIZE; + + DPR_WRITE(("%d: bufcount: %x count: %x tail: %x head: %x tmask: %x\n", + __LINE__, bufcount, count, tail, head, tmask)); + + /* + * Limit printer output to maxcps overall, with bursts allowed + * up to bufsize characters. + */ + bufcount = dgnc_maxcps_room(tty, bufcount); + + /* + * Take minimum of what the user wants to send, and the + * space available in the FEP buffer. + */ + count = min(count, bufcount); + + /* + * Bail if no space left. + */ + if (count <= 0) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(0); + } + + /* + * Output the printer ON string, if we are in terminal mode, but + * need to be in printer mode. + */ + if ((un->un_type == DGNC_PRINT) && !(ch->ch_flags & CH_PRON)) { + dgnc_wmove(ch, ch->ch_digi.digi_onstr, + (int) ch->ch_digi.digi_onlen); + head = (ch->ch_w_head) & tmask; + ch->ch_flags |= CH_PRON; + } + + /* + * On the other hand, output the printer OFF string, if we are + * currently in printer mode, but need to output to the terminal. + */ + if ((un->un_type != DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { + dgnc_wmove(ch, ch->ch_digi.digi_offstr, + (int) ch->ch_digi.digi_offlen); + head = (ch->ch_w_head) & tmask; + ch->ch_flags &= ~CH_PRON; + } + + /* + * If there is nothing left to copy, or I can't handle any more data, leave. + */ + if (count <= 0) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(0); + } + + if (from_user) { + + count = min(count, WRITEBUFLEN); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* + * If data is coming from user space, copy it into a temporary + * buffer so we don't get swapped out while doing the copy to + * the board. + */ + /* we're allowed to block if it's from_user */ + if (down_interruptible(&dgnc_TmpWriteSem)) { + return (-EINTR); + } + + /* + * copy_from_user() returns the number + * of bytes that could *NOT* be copied. + */ + count -= copy_from_user(dgnc_TmpWriteBuf, (const uchar __user *) buf, count); + + if (!count) { + up(&dgnc_TmpWriteSem); + return(-EFAULT); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + buf = dgnc_TmpWriteBuf; + + } + + n = count; + + /* + * If the write wraps over the top of the circular buffer, + * move the portion up to the wrap point, and reset the + * pointers to the bottom. + */ + remain = WQUEUESIZE - head; + + if (n >= remain) { + n -= remain; + memcpy(ch->ch_wqueue + head, buf, remain); + dgnc_sniff_nowait_nolock(ch, "USER WRITE", ch->ch_wqueue + head, remain); + head = 0; + buf += remain; + } + + if (n > 0) { + /* + * Move rest of data. + */ + remain = n; + memcpy(ch->ch_wqueue + head, buf, remain); + dgnc_sniff_nowait_nolock(ch, "USER WRITE", ch->ch_wqueue + head, remain); + head += remain; + } + + if (count) { + head &= tmask; + ch->ch_w_head = head; + } + +#if 0 + /* + * If this is the print device, and the + * printer is still on, we need to turn it + * off before going idle. + */ + if (count == orig_count) { + if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { + head &= tmask; + ch->ch_w_head = head; + dgnc_wmove(ch, ch->ch_digi.digi_offstr, + (int) ch->ch_digi.digi_offlen); + head = (ch->ch_w_head) & tmask; + ch->ch_flags &= ~CH_PRON; + } + } +#endif + + /* Update printer buffer empty time. */ + if ((un->un_type == DGNC_PRINT) && (ch->ch_digi.digi_maxcps > 0) + && (ch->ch_digi.digi_bufsize > 0)) { + ch->ch_cpstime += (HZ * count) / ch->ch_digi.digi_maxcps; + } + + if (from_user) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + up(&dgnc_TmpWriteSem); + } else { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + } + + DPR_WRITE(("Write finished - Write %d bytes of %d.\n", count, orig_count)); + + if (count) { + /* + * Channel lock is grabbed and then released + * inside this routine. + */ + ch->ch_bd->bd_ops->copy_data_from_queue_to_uart(ch); + } + + return (count); +} + + +/* + * Return modem signals to ld. + */ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) +static int dgnc_tty_tiocmget(struct tty_struct *tty) +#else +static int dgnc_tty_tiocmget(struct tty_struct *tty, struct file *file) +#endif +{ + struct channel_t *ch; + struct un_t *un; + int result = -EIO; + uchar mstat = 0; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return result; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return result; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return result; + + DPR_IOCTL(("dgnc_tty_tiocmget start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + mstat = (ch->ch_mostat | ch->ch_mistat); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + result = 0; + + if (mstat & UART_MCR_DTR) + result |= TIOCM_DTR; + if (mstat & UART_MCR_RTS) + result |= TIOCM_RTS; + if (mstat & UART_MSR_CTS) + result |= TIOCM_CTS; + if (mstat & UART_MSR_DSR) + result |= TIOCM_DSR; + if (mstat & UART_MSR_RI) + result |= TIOCM_RI; + if (mstat & UART_MSR_DCD) + result |= TIOCM_CD; + + DPR_IOCTL(("dgnc_tty_tiocmget finish\n")); + + return result; +} + + +/* + * dgnc_tty_tiocmset() + * + * Set modem signals, called by ld. + */ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39) +static int dgnc_tty_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +#else +static int dgnc_tty_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +#endif +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + int ret = -EIO; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return ret; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return ret; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return ret; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return ret; + + DPR_IOCTL(("dgnc_tty_tiocmset start\n")); + + + DGNC_LOCK(ch->ch_lock, lock_flags); + + if (set & TIOCM_RTS) { + ch->ch_mostat |= UART_MCR_RTS; + } + + if (set & TIOCM_DTR) { + ch->ch_mostat |= UART_MCR_DTR; + } + + if (clear & TIOCM_RTS) { + ch->ch_mostat &= ~(UART_MCR_RTS); + } + + if (clear & TIOCM_DTR) { + ch->ch_mostat &= ~(UART_MCR_DTR); + } + + ch->ch_bd->bd_ops->assert_modem_signals(ch); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_tiocmset finish\n")); + + return (0); +} + + +/* + * dgnc_tty_send_break() + * + * Send a Break, called by ld. + */ +static int dgnc_tty_send_break(struct tty_struct *tty, int msec) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + int ret = -EIO; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return ret; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return ret; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return ret; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return ret; + + switch (msec) { + case -1: + msec = 0xFFFF; + break; + case 0: + msec = 0; + break; + default: + break; + } + + DPR_IOCTL(("dgnc_tty_send_break start 1. %lx\n", jiffies)); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_bd->bd_ops->send_break(ch, msec); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_send_break finish\n")); + + return (0); + +} + + +/* + * dgnc_tty_wait_until_sent() + * + * wait until data has been transmitted, called by ld. + */ +static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + int rc; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + rc = bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return; + } + return; +} + + +/* + * dgnc_send_xchar() + * + * send a high priority character, called by ld. + */ +static void dgnc_tty_send_xchar(struct tty_struct *tty, char c) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_send_xchar start\n")); + printk("dgnc_tty_send_xchar start\n"); + + DGNC_LOCK(ch->ch_lock, lock_flags); + bd->bd_ops->send_immediate_char(ch, c); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_send_xchar finish\n")); + printk("dgnc_tty_send_xchar finish\n"); + return; +} + + + + +/* + * Return modem signals to ld. + */ +static inline int dgnc_get_mstat(struct channel_t *ch) +{ + unsigned char mstat; + int result = -EIO; + ulong lock_flags; + + DPR_IOCTL(("dgnc_getmstat start\n")); + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return(-ENXIO); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + mstat = (ch->ch_mostat | ch->ch_mistat); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + result = 0; + + if (mstat & UART_MCR_DTR) + result |= TIOCM_DTR; + if (mstat & UART_MCR_RTS) + result |= TIOCM_RTS; + if (mstat & UART_MSR_CTS) + result |= TIOCM_CTS; + if (mstat & UART_MSR_DSR) + result |= TIOCM_DSR; + if (mstat & UART_MSR_RI) + result |= TIOCM_RI; + if (mstat & UART_MSR_DCD) + result |= TIOCM_CD; + + DPR_IOCTL(("dgnc_getmstat finish\n")); + + return(result); +} + + + +/* + * Return modem signals to ld. + */ +static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value) +{ + int result; + int rc; + + DPR_IOCTL(("dgnc_get_modem_info start\n")); + + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return(-ENXIO); + + result = dgnc_get_mstat(ch); + + if (result < 0) + return (-ENXIO); + + rc = put_user(result, value); + + DPR_IOCTL(("dgnc_get_modem_info finish\n")); + return(rc); +} + + +/* + * dgnc_set_modem_info() + * + * Set modem signals, called by ld. + */ +static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + int ret = -ENXIO; + unsigned int arg = 0; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return ret; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return ret; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return ret; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return ret; + + ret = 0; + + DPR_IOCTL(("dgnc_set_modem_info() start\n")); + + ret = get_user(arg, value); + if (ret) + return(ret); + + switch (command) { + case TIOCMBIS: + if (arg & TIOCM_RTS) { + ch->ch_mostat |= UART_MCR_RTS; + } + + if (arg & TIOCM_DTR) { + ch->ch_mostat |= UART_MCR_DTR; + } + + break; + + case TIOCMBIC: + if (arg & TIOCM_RTS) { + ch->ch_mostat &= ~(UART_MCR_RTS); + } + + if (arg & TIOCM_DTR) { + ch->ch_mostat &= ~(UART_MCR_DTR); + } + + break; + + case TIOCMSET: + + if (arg & TIOCM_RTS) { + ch->ch_mostat |= UART_MCR_RTS; + } + else { + ch->ch_mostat &= ~(UART_MCR_RTS); + } + + if (arg & TIOCM_DTR) { + ch->ch_mostat |= UART_MCR_DTR; + } + else { + ch->ch_mostat &= ~(UART_MCR_DTR); + } + + break; + + default: + return(-EINVAL); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_bd->bd_ops->assert_modem_signals(ch); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_set_modem_info finish\n")); + + return (0); +} + + +/* + * dgnc_tty_digigeta() + * + * Ioctl to get the information for ditty. + * + * + * + */ +static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo) +{ + struct channel_t *ch; + struct un_t *un; + struct digi_t tmp; + ulong lock_flags; + + if (!retinfo) + return (-EFAULT); + + if (!tty || tty->magic != TTY_MAGIC) + return (-EFAULT); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (-EFAULT); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (-EFAULT); + + memset(&tmp, 0, sizeof(tmp)); + + DGNC_LOCK(ch->ch_lock, lock_flags); + memcpy(&tmp, &ch->ch_digi, sizeof(tmp)); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) + return (-EFAULT); + + return (0); +} + + +/* + * dgnc_tty_digiseta() + * + * Ioctl to set the information for ditty. + * + * + * + */ +static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + struct digi_t new_digi; + ulong lock_flags; + + DPR_IOCTL(("DIGI_SETA start\n")); + + if (!tty || tty->magic != TTY_MAGIC) + return (-EFAULT); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (-EFAULT); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (-EFAULT); + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (-EFAULT); + + if (copy_from_user(&new_digi, new_info, sizeof(struct digi_t))) { + DPR_IOCTL(("DIGI_SETA failed copy_from_user\n")); + return(-EFAULT); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* + * Handle transistions to and from RTS Toggle. + */ + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && (new_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat &= ~(UART_MCR_RTS); + if ((ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && !(new_digi.digi_flags & DIGI_RTS_TOGGLE)) + ch->ch_mostat |= (UART_MCR_RTS); + + /* + * Handle transistions to and from DTR Toggle. + */ + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && (new_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat &= ~(UART_MCR_DTR); + if ((ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && !(new_digi.digi_flags & DIGI_DTR_TOGGLE)) + ch->ch_mostat |= (UART_MCR_DTR); + + memcpy(&ch->ch_digi, &new_digi, sizeof(struct digi_t)); + + if (ch->ch_digi.digi_maxcps < 1) + ch->ch_digi.digi_maxcps = 1; + + if (ch->ch_digi.digi_maxcps > 10000) + ch->ch_digi.digi_maxcps = 10000; + + if (ch->ch_digi.digi_bufsize < 10) + ch->ch_digi.digi_bufsize = 10; + + if (ch->ch_digi.digi_maxchar < 1) + ch->ch_digi.digi_maxchar = 1; + + if (ch->ch_digi.digi_maxchar > ch->ch_digi.digi_bufsize) + ch->ch_digi.digi_maxchar = ch->ch_digi.digi_bufsize; + + if (ch->ch_digi.digi_onlen > DIGI_PLEN) + ch->ch_digi.digi_onlen = DIGI_PLEN; + + if (ch->ch_digi.digi_offlen > DIGI_PLEN) + ch->ch_digi.digi_offlen = DIGI_PLEN; + + ch->ch_bd->bd_ops->param(tty); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("DIGI_SETA finish\n")); + + return(0); +} + + +/* + * dgnc_set_termios() + */ +static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + unsigned long lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_c_cflag = tty->termios->c_cflag; + ch->ch_c_iflag = tty->termios->c_iflag; + ch->ch_c_oflag = tty->termios->c_oflag; + ch->ch_c_lflag = tty->termios->c_lflag; + ch->ch_startc = tty->termios->c_cc[VSTART]; + ch->ch_stopc = tty->termios->c_cc[VSTOP]; + + ch->ch_bd->bd_ops->param(tty); + dgnc_carrier(ch); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); +} + + +static void dgnc_tty_throttle(struct tty_struct *tty) +{ + struct channel_t *ch; + struct un_t *un; + ulong lock_flags = 0; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_throttle start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags |= (CH_FORCED_STOPI); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_throttle finish\n")); +} + + +static void dgnc_tty_unthrottle(struct tty_struct *tty) +{ + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_unthrottle start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags &= ~(CH_FORCED_STOPI); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_unthrottle finish\n")); +} + + +static void dgnc_tty_start(struct tty_struct *tty) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DPR_IOCTL(("dgcn_tty_start start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags &= ~(CH_FORCED_STOP); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_start finish\n")); +} + + +static void dgnc_tty_stop(struct tty_struct *tty) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_stop start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags |= (CH_FORCED_STOP); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_stop finish\n")); +} + + +/* + * dgnc_tty_flush_chars() + * + * Flush the cook buffer + * + * Note to self, and any other poor souls who venture here: + * + * flush in this case DOES NOT mean dispose of the data. + * instead, it means "stop buffering and send it if you + * haven't already." Just guess how I figured that out... SRW 2-Jun-98 + * + * It is also always called in interrupt context - JAR 8-Sept-99 + */ +static void dgnc_tty_flush_chars(struct tty_struct *tty) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_flush_chars start\n")); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Do something maybe here */ + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_flush_chars finish\n")); +} + + + +/* + * dgnc_tty_flush_buffer() + * + * Flush Tx buffer (make in == out) + */ +static void dgnc_tty_flush_buffer(struct tty_struct *tty) +{ + struct channel_t *ch; + struct un_t *un; + ulong lock_flags; + + if (!tty || tty->magic != TTY_MAGIC) + return; + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return; + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return; + + DPR_IOCTL(("dgnc_tty_flush_buffer on port: %d start\n", ch->ch_portnum)); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_flags &= ~CH_STOP; + + /* Flush our write queue */ + ch->ch_w_head = ch->ch_w_tail; + + /* Flush UARTs transmit FIFO */ + ch->ch_bd->bd_ops->flush_uart_write(ch); + + if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { + ch->ch_tun.un_flags &= ~(UN_LOW|UN_EMPTY); + wake_up_interruptible(&ch->ch_tun.un_flags_wait); + } + if (ch->ch_pun.un_flags & (UN_LOW|UN_EMPTY)) { + ch->ch_pun.un_flags &= ~(UN_LOW|UN_EMPTY); + wake_up_interruptible(&ch->ch_pun.un_flags_wait); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_flush_buffer finish\n")); +} + + + +/***************************************************************************** + * + * The IOCTL function and all of its helpers + * + *****************************************************************************/ + +/* + * dgnc_tty_ioctl() + * + * The usual assortment of ioctl's + */ +static int dgnc_tty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct board_t *bd; + struct channel_t *ch; + struct un_t *un; + int rc; + ulong lock_flags; + void __user *uarg = (void __user *) arg; + + if (!tty || tty->magic != TTY_MAGIC) + return (-ENODEV); + + un = tty->driver_data; + if (!un || un->magic != DGNC_UNIT_MAGIC) + return (-ENODEV); + + ch = un->un_ch; + if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) + return (-ENODEV); + + bd = ch->ch_bd; + if (!bd || bd->magic != DGNC_BOARD_MAGIC) + return (-ENODEV); + + DPR_IOCTL(("dgnc_tty_ioctl start on port %d - cmd %s (%x), arg %lx\n", + ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + DGNC_LOCK(ch->ch_lock, lock_flags); + + if (un->un_open_count <= 0) { + DPR_BASIC(("dgnc_tty_ioctl - unit not open.\n")); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(-EIO); + } + + switch (cmd) { + + /* Here are all the standard ioctl's that we MUST implement */ + + case TCSBRK: + /* + * TCSBRK is SVID version: non-zero arg --> no break + * this behaviour is exploited by tcdrain(). + * + * According to POSIX.1 spec (7.2.2.1.2) breaks should be + * between 0.25 and 0.5 seconds so we'll ask for something + * in the middle: 0.375 seconds. + */ + rc = tty_check_change(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + if (rc) { + return(rc); + } + + rc = ch->ch_bd->bd_ops->drain(tty, 0); + + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return(-EINTR); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + if(((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP)) { + ch->ch_bd->bd_ops->send_break(ch, 250); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", + ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + return(0); + + + case TCSBRKP: + /* support for POSIX tcsendbreak() + * According to POSIX.1 spec (7.2.2.1.2) breaks should be + * between 0.25 and 0.5 seconds so we'll ask for something + * in the middle: 0.375 seconds. + */ + rc = tty_check_change(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + if (rc) { + return(rc); + } + + rc = ch->ch_bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return(-EINTR); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_bd->bd_ops->send_break(ch, 250); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", + ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + return(0); + + case TIOCSBRK: + rc = tty_check_change(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + if (rc) { + return(rc); + } + + rc = ch->ch_bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return(-EINTR); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + ch->ch_bd->bd_ops->send_break(ch, 250); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", + ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + return(0); + + case TIOCCBRK: + /* Do Nothing */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return 0; + + case TIOCGSOFTCAR: + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) arg); + return(rc); + + case TIOCSSOFTCAR: + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = get_user(arg, (unsigned long __user *) arg); + if (rc) + return(rc); + + DGNC_LOCK(ch->ch_lock, lock_flags); + tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); + ch->ch_bd->bd_ops->param(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + return(0); + + case TIOCMGET: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(dgnc_get_modem_info(ch, uarg)); + + case TIOCMBIS: + case TIOCMBIC: + case TIOCMSET: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(dgnc_set_modem_info(tty, cmd, uarg)); + + /* + * Here are any additional ioctl's that we want to implement + */ + + case TCFLSH: + /* + * The linux tty driver doesn't have a flush + * input routine for the driver, assuming all backed + * up data is in the line disc. buffers. However, + * we all know that's not the case. Here, we + * act on the ioctl, but then lie and say we didn't + * so the line discipline will process the flush + * also. + */ + rc = tty_check_change(tty); + if (rc) { + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(rc); + } + + if ((arg == TCIFLUSH) || (arg == TCIOFLUSH)) { + ch->ch_r_head = ch->ch_r_tail; + ch->ch_bd->bd_ops->flush_uart_read(ch); + /* Force queue flow control to be released, if needed */ + dgnc_check_queue_flow_control(ch); + } + + if ((arg == TCOFLUSH) || (arg == TCIOFLUSH)) { + if (!(un->un_type == DGNC_PRINT)) { + ch->ch_w_head = ch->ch_w_tail; + ch->ch_bd->bd_ops->flush_uart_write(ch); + + if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { + ch->ch_tun.un_flags &= ~(UN_LOW|UN_EMPTY); + wake_up_interruptible(&ch->ch_tun.un_flags_wait); + } + + if (ch->ch_pun.un_flags & (UN_LOW|UN_EMPTY)) { + ch->ch_pun.un_flags &= ~(UN_LOW|UN_EMPTY); + wake_up_interruptible(&ch->ch_pun.un_flags_wait); + } + + } + } + + /* pretend we didn't recognize this IOCTL */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(-ENOIOCTLCMD); + +#ifdef TIOCGETP + case TIOCGETP: +#endif + case TCGETS: + case TCGETA: +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) + if (tty->ldisc->ops->ioctl) { +#else + if (tty->ldisc.ops->ioctl) { +#endif + int retval = (-ENXIO); + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (tty->termios) { +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,30) + retval = ((tty->ldisc->ops->ioctl) (tty, file, cmd, arg)); +#else + retval = ((tty->ldisc.ops->ioctl) (tty, file, cmd, arg)); +#endif + } + + DPR_IOCTL(("dgnc_tty_ioctl (LINE:%d) finish on port %d - cmd %s (%x), arg %lx\n", + __LINE__, ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + return(retval); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + DPR_IOCTL(("dgnc_tty_ioctl (LINE:%d) finish on port %d - cmd %s (%x), arg %lx\n", + __LINE__, ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + return(-ENOIOCTLCMD); + + case TCSETSF: + case TCSETSW: + /* + * The linux tty driver doesn't have a flush + * input routine for the driver, assuming all backed + * up data is in the line disc. buffers. However, + * we all know that's not the case. Here, we + * act on the ioctl, but then lie and say we didn't + * so the line discipline will process the flush + * also. + */ + if (cmd == TCSETSF) { + /* flush rx */ + ch->ch_flags &= ~CH_STOP; + ch->ch_r_head = ch->ch_r_tail; + ch->ch_bd->bd_ops->flush_uart_read(ch); + /* Force queue flow control to be released, if needed */ + dgnc_check_queue_flow_control(ch); + } + + /* now wait for all the output to drain */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = ch->ch_bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d\n", rc)); + return(-EINTR); + } + + DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", + ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); + + /* pretend we didn't recognize this */ + return(-ENOIOCTLCMD); + + case TCSETAW: + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = ch->ch_bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return(-EINTR); + } + + /* pretend we didn't recognize this */ + return(-ENOIOCTLCMD); + + case TCXONC: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + /* Make the ld do it */ + return(-ENOIOCTLCMD); + + case DIGI_GETA: + /* get information for ditty */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(dgnc_tty_digigeta(tty, uarg)); + + case DIGI_SETAW: + case DIGI_SETAF: + + /* set information for ditty */ + if (cmd == (DIGI_SETAW)) { + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = ch->ch_bd->bd_ops->drain(tty, 0); + if (rc) { + DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); + return(-EINTR); + } + DGNC_LOCK(ch->ch_lock, lock_flags); + } + else { + tty_ldisc_flush(tty); + } + /* fall thru */ + + case DIGI_SETA: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(dgnc_tty_digiseta(tty, uarg)); + + case DIGI_LOOPBACK: + { + uint loopback = 0; + /* Let go of locks when accessing user space, could sleep */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = get_user(loopback, (unsigned int __user *) arg); + if (rc) + return(rc); + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* Enable/disable internal loopback for this port */ + if (loopback) + ch->ch_flags |= CH_LOOPBACK; + else + ch->ch_flags &= ~(CH_LOOPBACK); + + ch->ch_bd->bd_ops->param(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(0); + } + + case DIGI_GETCUSTOMBAUD: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = put_user(ch->ch_custom_speed, (unsigned int __user *) arg); + return(rc); + + case DIGI_SETCUSTOMBAUD: + { + uint new_rate; + /* Let go of locks when accessing user space, could sleep */ + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = get_user(new_rate, (unsigned int __user *) arg); + if (rc) + return(rc); + DGNC_LOCK(ch->ch_lock, lock_flags); + dgnc_set_custom_speed(ch, new_rate); + ch->ch_bd->bd_ops->param(tty); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(0); + } + + /* + * This ioctl allows insertion of a character into the front + * of any pending data to be transmitted. + * + * This ioctl is to satify the "Send Character Immediate" + * call that the RealPort protocol spec requires. + */ + case DIGI_REALPORT_SENDIMMEDIATE: + { + unsigned char c; + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = get_user(c, (unsigned char __user *) arg); + if (rc) + return(rc); + DGNC_LOCK(ch->ch_lock, lock_flags); + ch->ch_bd->bd_ops->send_immediate_char(ch, c); + DGNC_UNLOCK(ch->ch_lock, lock_flags); + return(0); + } + + /* + * This ioctl returns all the current counts for the port. + * + * This ioctl is to satify the "Line Error Counters" + * call that the RealPort protocol spec requires. + */ + case DIGI_REALPORT_GETCOUNTERS: + { + struct digi_getcounter buf; + + buf.norun = ch->ch_err_overrun; + buf.noflow = 0; /* The driver doesn't keep this stat */ + buf.nframe = ch->ch_err_frame; + buf.nparity = ch->ch_err_parity; + buf.nbreak = ch->ch_err_break; + buf.rbytes = ch->ch_rxcount; + buf.tbytes = ch->ch_txcount; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (copy_to_user(uarg, &buf, sizeof(struct digi_getcounter))) { + return (-EFAULT); + } + return(0); + } + + /* + * This ioctl returns all current events. + * + * This ioctl is to satify the "Event Reporting" + * call that the RealPort protocol spec requires. + */ + case DIGI_REALPORT_GETEVENTS: + { + unsigned int events = 0; + + /* NOTE: MORE EVENTS NEEDS TO BE ADDED HERE */ + if (ch->ch_flags & CH_BREAK_SENDING) + events |= EV_TXB; + if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP)) { + events |= (EV_OPU | EV_OPS); + } + if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI)) { + events |= (EV_IPU | EV_IPS); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + rc = put_user(events, (unsigned int __user *) arg); + return(rc); + } + + /* + * This ioctl returns TOUT and TIN counters based + * upon the values passed in by the RealPort Server. + * It also passes back whether the UART Transmitter is + * empty as well. + */ + case DIGI_REALPORT_GETBUFFERS: + { + struct digi_getbuffer buf; + int tdist; + int count; + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + /* + * Get data from user first. + */ + if (copy_from_user(&buf, uarg, sizeof(struct digi_getbuffer))) { + return (-EFAULT); + } + + DGNC_LOCK(ch->ch_lock, lock_flags); + + /* + * Figure out how much data is in our RX and TX queues. + */ + buf.rxbuf = (ch->ch_r_head - ch->ch_r_tail) & RQUEUEMASK; + buf.txbuf = (ch->ch_w_head - ch->ch_w_tail) & WQUEUEMASK; + + /* + * Is the UART empty? Add that value to whats in our TX queue. + */ + count = buf.txbuf + ch->ch_bd->bd_ops->get_uart_bytes_left(ch); + + /* + * Figure out how much data the RealPort Server believes should + * be in our TX queue. + */ + tdist = (buf.tIn - buf.tOut) & 0xffff; + + /* + * If we have more data than the RealPort Server believes we + * should have, reduce our count to its amount. + * + * This count difference CAN happen because the Linux LD can + * insert more characters into our queue for OPOST processing + * that the RealPort Server doesn't know about. + */ + if (buf.txbuf > tdist) { + buf.txbuf = tdist; + } + + /* + * Report whether our queue and UART TX are completely empty. + */ + if (count) { + buf.txdone = 0; + } else { + buf.txdone = 1; + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + if (copy_to_user(uarg, &buf, sizeof(struct digi_getbuffer))) { + return (-EFAULT); + } + return(0); + } + default: + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_ioctl - in default\n")); + DPR_IOCTL(("dgnc_tty_ioctl end - cmd %s (%x), arg %lx\n", + dgnc_ioctl_name(cmd), cmd, arg)); + + return(-ENOIOCTLCMD); + } + + DGNC_UNLOCK(ch->ch_lock, lock_flags); + + DPR_IOCTL(("dgnc_tty_ioctl end - cmd %s (%x), arg %lx\n", + dgnc_ioctl_name(cmd), cmd, arg)); + + return(0); +} diff --git a/drivers/staging/dgnc/dgnc_tty.h b/drivers/staging/dgnc/dgnc_tty.h new file mode 100644 index 0000000..deb388d --- /dev/null +++ b/drivers/staging/dgnc/dgnc_tty.h @@ -0,0 +1,42 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +#ifndef __DGNC_TTY_H +#define __DGNC_TTY_H + +#include "dgnc_driver.h" + +int dgnc_tty_register(struct board_t *brd); + +int dgnc_tty_preinit(void); +int dgnc_tty_init(struct board_t *); + +void dgnc_tty_post_uninit(void); +void dgnc_tty_uninit(struct board_t *); + +void dgnc_input(struct channel_t *ch); +void dgnc_carrier(struct channel_t *ch); +void dgnc_wakeup_writes(struct channel_t *ch); +void dgnc_check_queue_flow_control(struct channel_t *ch); + +void dgnc_sniff_nowait_nolock(struct channel_t *ch, uchar *text, uchar *buf, int nbuf); + +#endif diff --git a/drivers/staging/dgnc/dgnc_types.h b/drivers/staging/dgnc/dgnc_types.h new file mode 100644 index 0000000..4fa3585 --- /dev/null +++ b/drivers/staging/dgnc/dgnc_types.h @@ -0,0 +1,36 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +#ifndef __DGNC_TYPES_H +#define __DGNC_TYPES_H + +#ifndef TRUE +# define TRUE 1 +#endif + +#ifndef FALSE +# define FALSE 0 +#endif + +/* Required for our shared headers! */ +typedef unsigned char uchar; + +#endif diff --git a/drivers/staging/dgnc/digi.h b/drivers/staging/dgnc/digi.h new file mode 100644 index 0000000..ab90382 --- /dev/null +++ b/drivers/staging/dgnc/digi.h @@ -0,0 +1,419 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * $Id: digi.h,v 1.1.1.1 2009/05/20 12:19:19 markh Exp $ + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + +#ifndef __DIGI_H +#define __DIGI_H + +/************************************************************************ + *** Definitions for Digi ditty(1) command. + ************************************************************************/ + + +/* + * Copyright (c) 1988-96 Digi International Inc., All Rights Reserved. + */ + +/************************************************************************ + * This module provides application access to special Digi + * serial line enhancements which are not standard UNIX(tm) features. + ************************************************************************/ + +#if !defined(TIOCMODG) + +#define TIOCMODG ('d'<<8) | 250 /* get modem ctrl state */ +#define TIOCMODS ('d'<<8) | 251 /* set modem ctrl state */ + +#ifndef TIOCM_LE +#define TIOCM_LE 0x01 /* line enable */ +#define TIOCM_DTR 0x02 /* data terminal ready */ +#define TIOCM_RTS 0x04 /* request to send */ +#define TIOCM_ST 0x08 /* secondary transmit */ +#define TIOCM_SR 0x10 /* secondary receive */ +#define TIOCM_CTS 0x20 /* clear to send */ +#define TIOCM_CAR 0x40 /* carrier detect */ +#define TIOCM_RNG 0x80 /* ring indicator */ +#define TIOCM_DSR 0x100 /* data set ready */ +#define TIOCM_RI TIOCM_RNG /* ring (alternate) */ +#define TIOCM_CD TIOCM_CAR /* carrier detect (alt) */ +#endif + +#endif + +#if !defined(TIOCMSET) +#define TIOCMSET ('d'<<8) | 252 /* set modem ctrl state */ +#define TIOCMGET ('d'<<8) | 253 /* set modem ctrl state */ +#endif + +#if !defined(TIOCMBIC) +#define TIOCMBIC ('d'<<8) | 254 /* set modem ctrl state */ +#define TIOCMBIS ('d'<<8) | 255 /* set modem ctrl state */ +#endif + + +#if !defined(TIOCSDTR) +#define TIOCSDTR ('e'<<8) | 0 /* set DTR */ +#define TIOCCDTR ('e'<<8) | 1 /* clear DTR */ +#endif + +/************************************************************************ + * Ioctl command arguments for DIGI parameters. + ************************************************************************/ +#define DIGI_GETA ('e'<<8) | 94 /* Read params */ + +#define DIGI_SETA ('e'<<8) | 95 /* Set params */ +#define DIGI_SETAW ('e'<<8) | 96 /* Drain & set params */ +#define DIGI_SETAF ('e'<<8) | 97 /* Drain, flush & set params */ + +#define DIGI_KME ('e'<<8) | 98 /* Read/Write Host */ + /* Adapter Memory */ + +#define DIGI_GETFLOW ('e'<<8) | 99 /* Get startc/stopc flow */ + /* control characters */ +#define DIGI_SETFLOW ('e'<<8) | 100 /* Set startc/stopc flow */ + /* control characters */ +#define DIGI_GETAFLOW ('e'<<8) | 101 /* Get Aux. startc/stopc */ + /* flow control chars */ +#define DIGI_SETAFLOW ('e'<<8) | 102 /* Set Aux. startc/stopc */ + /* flow control chars */ + +#define DIGI_GEDELAY ('d'<<8) | 246 /* Get edelay */ +#define DIGI_SEDELAY ('d'<<8) | 247 /* Set edelay */ + +struct digiflow_t { + unsigned char startc; /* flow cntl start char */ + unsigned char stopc; /* flow cntl stop char */ +}; + + +#ifdef FLOW_2200 +#define F2200_GETA ('e'<<8) | 104 /* Get 2x36 flow cntl flags */ +#define F2200_SETAW ('e'<<8) | 105 /* Set 2x36 flow cntl flags */ +#define F2200_MASK 0x03 /* 2200 flow cntl bit mask */ +#define FCNTL_2200 0x01 /* 2x36 terminal flow cntl */ +#define PCNTL_2200 0x02 /* 2x36 printer flow cntl */ +#define F2200_XON 0xf8 +#define P2200_XON 0xf9 +#define F2200_XOFF 0xfa +#define P2200_XOFF 0xfb + +#define FXOFF_MASK 0x03 /* 2200 flow status mask */ +#define RCVD_FXOFF 0x01 /* 2x36 Terminal XOFF rcvd */ +#define RCVD_PXOFF 0x02 /* 2x36 Printer XOFF rcvd */ +#endif + +/************************************************************************ + * Values for digi_flags + ************************************************************************/ +#define DIGI_IXON 0x0001 /* Handle IXON in the FEP */ +#define DIGI_FAST 0x0002 /* Fast baud rates */ +#define RTSPACE 0x0004 /* RTS input flow control */ +#define CTSPACE 0x0008 /* CTS output flow control */ +#define DSRPACE 0x0010 /* DSR output flow control */ +#define DCDPACE 0x0020 /* DCD output flow control */ +#define DTRPACE 0x0040 /* DTR input flow control */ +#define DIGI_COOK 0x0080 /* Cooked processing done in FEP */ +#define DIGI_FORCEDCD 0x0100 /* Force carrier */ +#define DIGI_ALTPIN 0x0200 /* Alternate RJ-45 pin config */ +#define DIGI_AIXON 0x0400 /* Aux flow control in fep */ +#define DIGI_PRINTER 0x0800 /* Hold port open for flow cntrl*/ +#define DIGI_PP_INPUT 0x1000 /* Change parallel port to input*/ +#define DIGI_DTR_TOGGLE 0x2000 /* Support DTR Toggle */ +#define DIGI_422 0x4000 /* for 422/232 selectable panel */ +#define DIGI_RTS_TOGGLE 0x8000 /* Support RTS Toggle */ + +/************************************************************************ + * These options are not supported on the comxi. + ************************************************************************/ +#define DIGI_COMXI (DIGI_FAST|DIGI_COOK|DSRPACE|DCDPACE|DTRPACE) + +#define DIGI_PLEN 28 /* String length */ +#define DIGI_TSIZ 10 /* Terminal string len */ + +/************************************************************************ + * Structure used with ioctl commands for DIGI parameters. + ************************************************************************/ +struct digi_t { + unsigned short digi_flags; /* Flags (see above) */ + unsigned short digi_maxcps; /* Max printer CPS */ + unsigned short digi_maxchar; /* Max chars in print queue */ + unsigned short digi_bufsize; /* Buffer size */ + unsigned char digi_onlen; /* Length of ON string */ + unsigned char digi_offlen; /* Length of OFF string */ + char digi_onstr[DIGI_PLEN]; /* Printer on string */ + char digi_offstr[DIGI_PLEN]; /* Printer off string */ + char digi_term[DIGI_TSIZ]; /* terminal string */ +}; + +/************************************************************************ + * KME definitions and structures. + ************************************************************************/ +#define RW_IDLE 0 /* Operation complete */ +#define RW_READ 1 /* Read Concentrator Memory */ +#define RW_WRITE 2 /* Write Concentrator Memory */ + +struct rw_t { + unsigned char rw_req; /* Request type */ + unsigned char rw_board; /* Host Adapter board number */ + unsigned char rw_conc; /* Concentrator number */ + unsigned char rw_reserved; /* Reserved for expansion */ + unsigned int rw_addr; /* Address in concentrator */ + unsigned short rw_size; /* Read/write request length */ + unsigned char rw_data[128]; /* Data to read/write */ +}; + +/*********************************************************************** + * Shrink Buffer and Board Information definitions and structures. + + ************************************************************************/ + /* Board type return codes */ +#define PCXI_TYPE 1 /* Board type at the designated port is a PC/Xi */ +#define PCXM_TYPE 2 /* Board type at the designated port is a PC/Xm */ +#define PCXE_TYPE 3 /* Board type at the designated port is a PC/Xe */ +#define MCXI_TYPE 4 /* Board type at the designated port is a MC/Xi */ +#define COMXI_TYPE 5 /* Board type at the designated port is a COM/Xi */ + + /* Non-Zero Result codes. */ +#define RESULT_NOBDFND 1 /* A Digi product at that port is not config installed */ +#define RESULT_NODESCT 2 /* A memory descriptor was not obtainable */ +#define RESULT_NOOSSIG 3 /* FEP/OS signature was not detected on the board */ +#define RESULT_TOOSML 4 /* Too small an area to shrink. */ +#define RESULT_NOCHAN 5 /* Channel structure for the board was not found */ + +struct shrink_buf_struct { + unsigned int shrink_buf_vaddr; /* Virtual address of board */ + unsigned int shrink_buf_phys; /* Physical address of board */ + unsigned int shrink_buf_bseg; /* Amount of board memory */ + unsigned int shrink_buf_hseg; /* '186 Begining of Dual-Port */ + + unsigned int shrink_buf_lseg; /* '186 Begining of freed memory */ + unsigned int shrink_buf_mseg; /* Linear address from start of + dual-port were freed memory + begins, host viewpoint. */ + + unsigned int shrink_buf_bdparam; /* Parameter for xxmemon and + xxmemoff */ + + unsigned int shrink_buf_reserva; /* Reserved */ + unsigned int shrink_buf_reservb; /* Reserved */ + unsigned int shrink_buf_reservc; /* Reserved */ + unsigned int shrink_buf_reservd; /* Reserved */ + + unsigned char shrink_buf_result; /* Reason for call failing + Zero is Good return */ + unsigned char shrink_buf_init; /* Non-Zero if it caused an + xxinit call. */ + + unsigned char shrink_buf_anports; /* Number of async ports */ + unsigned char shrink_buf_snports; /* Number of sync ports */ + unsigned char shrink_buf_type; /* Board type 1 = PC/Xi, + 2 = PC/Xm, + 3 = PC/Xe + 4 = MC/Xi + 5 = COMX/i */ + unsigned char shrink_buf_card; /* Card number */ + +}; + +/************************************************************************ + * Structure to get driver status information + ************************************************************************/ +struct digi_dinfo { + unsigned int dinfo_nboards; /* # boards configured */ + char dinfo_reserved[12]; /* for future expansion */ + char dinfo_version[16]; /* driver version */ +}; + +#define DIGI_GETDD ('d'<<8) | 248 /* get driver info */ + +/************************************************************************ + * Structure used with ioctl commands for per-board information + * + * physsize and memsize differ when board has "windowed" memory + ************************************************************************/ +struct digi_info { + unsigned int info_bdnum; /* Board number (0 based) */ + unsigned int info_ioport; /* io port address */ + unsigned int info_physaddr; /* memory address */ + unsigned int info_physsize; /* Size of host mem window */ + unsigned int info_memsize; /* Amount of dual-port mem */ + /* on board */ + unsigned short info_bdtype; /* Board type */ + unsigned short info_nports; /* number of ports */ + char info_bdstate; /* board state */ + char info_reserved[7]; /* for future expansion */ +}; + +#define DIGI_GETBD ('d'<<8) | 249 /* get board info */ + +struct digi_stat { + unsigned int info_chan; /* Channel number (0 based) */ + unsigned int info_brd; /* Board number (0 based) */ + unsigned int info_cflag; /* cflag for channel */ + unsigned int info_iflag; /* iflag for channel */ + unsigned int info_oflag; /* oflag for channel */ + unsigned int info_mstat; /* mstat for channel */ + unsigned int info_tx_data; /* tx_data for channel */ + unsigned int info_rx_data; /* rx_data for channel */ + unsigned int info_hflow; /* hflow for channel */ + unsigned int info_reserved[8]; /* for future expansion */ +}; + +#define DIGI_GETSTAT ('d'<<8) | 244 /* get board info */ +/************************************************************************ + * + * Structure used with ioctl commands for per-channel information + * + ************************************************************************/ +struct digi_ch { + unsigned int info_bdnum; /* Board number (0 based) */ + unsigned int info_channel; /* Channel index number */ + unsigned int info_ch_cflag; /* Channel cflag */ + unsigned int info_ch_iflag; /* Channel iflag */ + unsigned int info_ch_oflag; /* Channel oflag */ + unsigned int info_chsize; /* Channel structure size */ + unsigned int info_sleep_stat; /* sleep status */ + dev_t info_dev; /* device number */ + unsigned char info_initstate; /* Channel init state */ + unsigned char info_running; /* Channel running state */ + int reserved[8]; /* reserved for future use */ +}; + +/* +* This structure is used with the DIGI_FEPCMD ioctl to +* tell the driver which port to send the command for. +*/ +struct digi_cmd { + int cmd; + int word; + int ncmds; + int chan; /* channel index (zero based) */ + int bdid; /* board index (zero based) */ +}; + + +struct digi_getbuffer /* Struct for holding buffer use counts */ +{ + unsigned long tIn; + unsigned long tOut; + unsigned long rxbuf; + unsigned long txbuf; + unsigned long txdone; +}; + +struct digi_getcounter +{ + unsigned long norun; /* number of UART overrun errors */ + unsigned long noflow; /* number of buffer overflow errors */ + unsigned long nframe; /* number of framing errors */ + unsigned long nparity; /* number of parity errors */ + unsigned long nbreak; /* number of breaks received */ + unsigned long rbytes; /* number of received bytes */ + unsigned long tbytes; /* number of bytes transmitted fully */ +}; + +/* +* info_sleep_stat defines +*/ +#define INFO_RUNWAIT 0x0001 +#define INFO_WOPEN 0x0002 +#define INFO_TTIOW 0x0004 +#define INFO_CH_RWAIT 0x0008 +#define INFO_CH_WEMPTY 0x0010 +#define INFO_CH_WLOW 0x0020 +#define INFO_XXBUF_BUSY 0x0040 + +#define DIGI_GETCH ('d'<<8) | 245 /* get board info */ + +/* Board type definitions */ + +#define SUBTYPE 0007 +#define T_PCXI 0000 +#define T_PCXM 0001 +#define T_PCXE 0002 +#define T_PCXR 0003 +#define T_SP 0004 +#define T_SP_PLUS 0005 +# define T_HERC 0000 +# define T_HOU 0001 +# define T_LON 0002 +# define T_CHA 0003 +#define FAMILY 0070 +#define T_COMXI 0000 +#define T_PCXX 0010 +#define T_CX 0020 +#define T_EPC 0030 +#define T_PCLITE 0040 +#define T_SPXX 0050 +#define T_AVXX 0060 +#define T_DXB 0070 +#define T_A2K_4_8 0070 +#define BUSTYPE 0700 +#define T_ISABUS 0000 +#define T_MCBUS 0100 +#define T_EISABUS 0200 +#define T_PCIBUS 0400 + +/* Board State Definitions */ + +#define BD_RUNNING 0x0 +#define BD_REASON 0x7f +#define BD_NOTFOUND 0x1 +#define BD_NOIOPORT 0x2 +#define BD_NOMEM 0x3 +#define BD_NOBIOS 0x4 +#define BD_NOFEP 0x5 +#define BD_FAILED 0x6 +#define BD_ALLOCATED 0x7 +#define BD_TRIBOOT 0x8 +#define BD_BADKME 0x80 + +#define DIGI_SPOLL ('d'<<8) | 254 /* change poller rate */ + +#define DIGI_SETCUSTOMBAUD _IOW('e', 106, int) /* Set integer baud rate */ +#define DIGI_GETCUSTOMBAUD _IOR('e', 107, int) /* Get integer baud rate */ + +#define DIGI_REALPORT_GETBUFFERS ('e'<<8 ) | 108 +#define DIGI_REALPORT_SENDIMMEDIATE ('e'<<8 ) | 109 +#define DIGI_REALPORT_GETCOUNTERS ('e'<<8 ) | 110 +#define DIGI_REALPORT_GETEVENTS ('e'<<8 ) | 111 + +#define EV_OPU 0x0001 //!<Output paused by client +#define EV_OPS 0x0002 //!<Output paused by reqular sw flowctrl +#define EV_OPX 0x0004 //!<Output paused by extra sw flowctrl +#define EV_OPH 0x0008 //!<Output paused by hw flowctrl +#define EV_OPT 0x0800 //!<Output paused for RTS Toggle predelay + +#define EV_IPU 0x0010 //!<Input paused unconditionally by user +#define EV_IPS 0x0020 //!<Input paused by high/low water marks +//#define EV_IPH 0x0040 //!<Input paused w/ hardware +#define EV_IPA 0x0400 //!<Input paused by pattern alarm module + +#define EV_TXB 0x0040 //!<Transmit break pending +#define EV_TXI 0x0080 //!<Transmit immediate pending +#define EV_TXF 0x0100 //!<Transmit flowctrl char pending +#define EV_RXB 0x0200 //!<Break received + +#define EV_OPALL 0x080f //!<Output pause flags +#define EV_IPALL 0x0430 //!<Input pause flags + +#endif /* DIGI_H */ diff --git a/drivers/staging/dgnc/dpacompat.h b/drivers/staging/dgnc/dpacompat.h new file mode 100644 index 0000000..44379eb --- /dev/null +++ b/drivers/staging/dgnc/dpacompat.h @@ -0,0 +1,115 @@ +/* + * Copyright 2003 Digi International (www.digi.com) + * Scott H Kilau <Scott_Kilau at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!! + */ + + +/* + * This structure holds data needed for the intelligent <--> nonintelligent + * DPA translation + */ + struct ni_info { + int board; + int channel; + int dtr; + int rts; + int cts; + int dsr; + int ri; + int dcd; + int curtx; + int currx; + unsigned short iflag; + unsigned short oflag; + unsigned short cflag; + unsigned short lflag; + + unsigned int mstat; + unsigned char hflow; + + unsigned char xmit_stopped; + unsigned char recv_stopped; + + unsigned int baud; +}; + +#define RW_READ 1 +#define RW_WRITE 2 +#define DIGI_KME ('e'<<8) | 98 /* Read/Write Host */ + +#define SUBTYPE 0007 +#define T_PCXI 0000 +#define T_PCXEM 0001 +#define T_PCXE 0002 +#define T_PCXR 0003 +#define T_SP 0004 +#define T_SP_PLUS 0005 + +#define T_HERC 0000 +#define T_HOU 0001 +#define T_LON 0002 +#define T_CHA 0003 + +#define T_NEO 0000 +#define T_NEO_EXPRESS 0001 +#define T_CLASSIC 0002 + +#define FAMILY 0070 +#define T_COMXI 0000 +#define T_NI 0000 +#define T_PCXX 0010 +#define T_CX 0020 +#define T_EPC 0030 +#define T_PCLITE 0040 +#define T_SPXX 0050 +#define T_AVXX 0060 +#define T_DXB 0070 +#define T_A2K_4_8 0070 + +#define BUSTYPE 0700 +#define T_ISABUS 0000 +#define T_MCBUS 0100 +#define T_EISABUS 0200 +#define T_PCIBUS 0400 + +/* Board State Definitions */ + +#define BD_RUNNING 0x0 +#define BD_REASON 0x7f +#define BD_NOTFOUND 0x1 +#define BD_NOIOPORT 0x2 +#define BD_NOMEM 0x3 +#define BD_NOBIOS 0x4 +#define BD_NOFEP 0x5 +#define BD_FAILED 0x6 +#define BD_ALLOCATED 0x7 +#define BD_TRIBOOT 0x8 +#define BD_BADKME 0x80 + +#define DIGI_AIXON 0x0400 /* Aux flow control in fep */ + +/* Ioctls needed for dpa operation */ + +#define DIGI_GETDD ('d'<<8) | 248 /* get driver info */ +#define DIGI_GETBD ('d'<<8) | 249 /* get board info */ +#define DIGI_GET_NI_INFO ('d'<<8) | 250 /* nonintelligent state snfo */ + +/* Other special ioctls */ +#define DIGI_TIMERIRQ ('d'<<8) | 251 /* Enable/disable RS_TIMER use */ +#define DIGI_LOOPBACK ('d'<<8) | 252 /* Enable/disable UART internal loopback */ -- 1.8.1.2 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
