Looks like all the changes to this driver had been automated churn since git era begun. The driver is using virt_to_bus() so it should be updated to a proper DMA API or removed. Given the latest "news" entry on the website is from 1999 I'm opting for the latter. I'm marking the allocated char device major number as [REMOVED], I reckon we can't reuse it in case some SW out there assumes its COSA? Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> --- CC: corbet@xxxxxxx CC: linux-doc@xxxxxxxxxxxxxxx CC: alexandre.ghiti@xxxxxxxxxxxxx CC: linus.walleij@xxxxxxxxxx CC: juerg.haefliger@xxxxxxxxxxxxx CC: kilobyte@xxxxxxxxxx CC: huangguangbin2@xxxxxxxxxx CC: lipeng321@xxxxxxxxxx CC: arnd@xxxxxxxx CC: Jan "Yenya" Kasprzak <kas@xxxxxxxxxx> --- Documentation/admin-guide/devices.txt | 2 +- MAINTAINERS | 6 - drivers/net/wan/Kconfig | 22 - drivers/net/wan/Makefile | 1 - drivers/net/wan/cosa.c | 2052 ------------------------- drivers/net/wan/cosa.h | 104 -- 6 files changed, 1 insertion(+), 2186 deletions(-) delete mode 100644 drivers/net/wan/cosa.c delete mode 100644 drivers/net/wan/cosa.h diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt index c07dc0ee860e..9764d6edb189 100644 --- a/Documentation/admin-guide/devices.txt +++ b/Documentation/admin-guide/devices.txt @@ -1933,7 +1933,7 @@ ... 255= /dev/umem/d15p15 15th partition of 16th board. - 117 char COSA/SRP synchronous serial card + 117 char [REMOVED] COSA/SRP synchronous serial card 0 = /dev/cosa0c0 1st board, 1st channel 1 = /dev/cosa0c1 1st board, 2nd channel ... diff --git a/MAINTAINERS b/MAINTAINERS index dd61684c2573..9619058bb0b9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5047,12 +5047,6 @@ S: Maintained F: Documentation/hwmon/corsair-psu.rst F: drivers/hwmon/corsair-psu.c -COSA/SRP SYNC SERIAL DRIVER -M: Jan "Yenya" Kasprzak <kas@xxxxxxxxxx> -S: Maintained -W: http://www.fi.muni.cz/~kas/cosa/ -F: drivers/net/wan/cosa* - COUNTER SUBSYSTEM M: William Breathitt Gray <vilhelm.gray@xxxxxxxxx> L: linux-iio@xxxxxxxxxxxxxxx diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig index 588b2333cdb8..12c5b6c67ab2 100644 --- a/drivers/net/wan/Kconfig +++ b/drivers/net/wan/Kconfig @@ -35,28 +35,6 @@ config HOSTESS_SV11 The driver will be compiled as a module: the module will be called hostess_sv11. -# The COSA/SRP driver has not been tested as non-modular yet. -config COSA - tristate "COSA/SRP sync serial boards support" - depends on ISA && m && ISA_DMA_API && HDLC && VIRT_TO_BUS - help - Driver for COSA and SRP synchronous serial boards. - - These boards allow to connect synchronous serial devices (for example - base-band modems, or any other device with the X.21, V.24, V.35 or - V.36 interface) to your Linux box. The cards can work as the - character device, synchronous PPP network device, or the Cisco HDLC - network device. - - You will need user-space utilities COSA or SRP boards for downloading - the firmware to the cards and to set them up. Look at the - <http://www.fi.muni.cz/~kas/cosa/> for more information. You can also - read the comment at the top of the <file:drivers/net/wan/cosa.c> for - details about the cards and the driver itself. - - The driver will be compiled as a module: the - module will be called cosa. - # There is no way to detect a Sealevel board. Force it modular config SEALEVEL_4021 tristate "Sealevel Systems 4021 support" diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile index 1cd42147b34f..901a094c061c 100644 --- a/drivers/net/wan/Makefile +++ b/drivers/net/wan/Makefile @@ -16,7 +16,6 @@ obj-$(CONFIG_HDLC_X25) += hdlc_x25.o obj-$(CONFIG_HOSTESS_SV11) += z85230.o hostess_sv11.o obj-$(CONFIG_SEALEVEL_4021) += z85230.o sealevel.o -obj-$(CONFIG_COSA) += cosa.o obj-$(CONFIG_FARSYNC) += farsync.o obj-$(CONFIG_LAPBETHER) += lapbether.o diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c deleted file mode 100644 index 23d2954d9747..000000000000 --- a/drivers/net/wan/cosa.c +++ /dev/null @@ -1,2052 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* $Id: cosa.c,v 1.31 2000/03/08 17:47:16 kas Exp $ */ - -/* Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@xxxxxxxxxx> - * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@xxxxxxxxx> - */ - -/* The driver for the SRP and COSA synchronous serial cards. - * - * HARDWARE INFO - * - * Both cards are developed at the Institute of Computer Science, - * Masaryk University (https://www.ics.muni.cz/). The hardware is - * developed by Jiri Novotny <novotny@xxxxxxxxxxx>. More information - * and the photo of both cards is available at - * http://www.pavoucek.cz/cosa.html. The card documentation, firmwares - * and other goods can be downloaded from ftp://ftp.ics.muni.cz/pub/cosa/. - * For Linux-specific utilities, see below in the "Software info" section. - * If you want to order the card, contact Jiri Novotny. - * - * The SRP (serial port?, the Czech word "srp" means "sickle") card - * is a 2-port intelligent (with its own 8-bit CPU) synchronous serial card - * with V.24 interfaces up to 80kb/s each. - * - * The COSA (communication serial adapter?, the Czech word "kosa" means - * "scythe") is a next-generation sync/async board with two interfaces - * - currently any of V.24, X.21, V.35 and V.36 can be selected. - * It has a 16-bit SAB80166 CPU and can do up to 10 Mb/s per channel. - * The 8-channels version is in development. - * - * Both types have downloadable firmware and communicate via ISA DMA. - * COSA can be also a bus-mastering device. - * - * SOFTWARE INFO - * - * The homepage of the Linux driver is at https://www.fi.muni.cz/~kas/cosa/. - * The CVS tree of Linux driver can be viewed there, as well as the - * firmware binaries and user-space utilities for downloading the firmware - * into the card and setting up the card. - * - * The Linux driver (unlike the present *BSD drivers :-) can work even - * for the COSA and SRP in one computer and allows each channel to work - * in one of the two modes (character or network device). - * - * AUTHOR - * - * The Linux driver was written by Jan "Yenya" Kasprzak <kas@xxxxxxxxxx>. - * - * You can mail me bugfixes and even success reports. I am especially - * interested in the SMP and/or muliti-channel success/failure reports - * (I wonder if I did the locking properly :-). - * - * THE AUTHOR USED THE FOLLOWING SOURCES WHEN PROGRAMMING THE DRIVER - * - * The COSA/SRP NetBSD driver by Zdenek Salvet and Ivos Cernohlavek - * The skeleton.c by Donald Becker - * The SDL Riscom/N2 driver by Mike Natale - * The Comtrol Hostess SV11 driver by Alan Cox - * The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/sched/signal.h> -#include <linux/slab.h> -#include <linux/poll.h> -#include <linux/fs.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/hdlc.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/netdevice.h> -#include <linux/spinlock.h> -#include <linux/mutex.h> -#include <linux/device.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <asm/byteorder.h> - -#undef COSA_SLOW_IO /* for testing purposes only */ - -#include "cosa.h" - -/* Maximum length of the identification string. */ -#define COSA_MAX_ID_STRING 128 - -/* Maximum length of the channel name */ -#define COSA_MAX_NAME (sizeof("cosaXXXcXXX") + 1) - -/* Per-channel data structure */ - -struct channel_data { - int usage; /* Usage count; >0 for chrdev, -1 for netdev */ - int num; /* Number of the channel */ - struct cosa_data *cosa; /* Pointer to the per-card structure */ - int txsize; /* Size of transmitted data */ - char *txbuf; /* Transmit buffer */ - char name[COSA_MAX_NAME]; /* channel name */ - - /* The HW layer interface */ - /* routine called from the RX interrupt */ - char *(*setup_rx)(struct channel_data *channel, int size); - /* routine called when the RX is done (from the EOT interrupt) */ - int (*rx_done)(struct channel_data *channel); - /* routine called when the TX is done (from the EOT interrupt) */ - int (*tx_done)(struct channel_data *channel, int size); - - /* Character device parts */ - struct mutex rlock; - struct semaphore wsem; - char *rxdata; - int rxsize; - wait_queue_head_t txwaitq, rxwaitq; - int tx_status, rx_status; - - /* generic HDLC device parts */ - struct net_device *netdev; - struct sk_buff *rx_skb, *tx_skb; -}; - -/* cosa->firmware_status bits */ -#define COSA_FW_RESET BIT(0) /* Is the ROM monitor active? */ -#define COSA_FW_DOWNLOAD BIT(1) /* Is the microcode downloaded? */ -#define COSA_FW_START BIT(2) /* Is the microcode running? */ - -struct cosa_data { - int num; /* Card number */ - char name[COSA_MAX_NAME]; /* Card name - e.g "cosa0" */ - unsigned int datareg, statusreg; /* I/O ports */ - unsigned short irq, dma; /* IRQ and DMA number */ - unsigned short startaddr; /* Firmware start address */ - unsigned short busmaster; /* Use busmastering? */ - int nchannels; /* # of channels on this card */ - int driver_status; /* For communicating with firmware */ - int firmware_status; /* Downloaded, reseted, etc. */ - unsigned long rxbitmap, txbitmap;/* Bitmap of channels who are willing to send/receive data */ - unsigned long rxtx; /* RX or TX in progress? */ - int enabled; - int usage; /* usage count */ - int txchan, txsize, rxsize; - struct channel_data *rxchan; - char *bouncebuf; - char *txbuf, *rxbuf; - struct channel_data *chan; - spinlock_t lock; /* For exclusive operations on this structure */ - char id_string[COSA_MAX_ID_STRING]; /* ROM monitor ID string */ - char *type; /* card type */ -}; - -/* Define this if you want all the possible ports to be autoprobed. - * It is here but it probably is not a good idea to use this. - */ -/* #define COSA_ISA_AUTOPROBE 1*/ - -/* Character device major number. 117 was allocated for us. - * The value of 0 means to allocate a first free one. - */ -static DEFINE_MUTEX(cosa_chardev_mutex); -static int cosa_major = 117; - -/* Encoding of the minor numbers: - * The lowest CARD_MINOR_BITS bits means the channel on the single card, - * the highest bits means the card number. - */ -#define CARD_MINOR_BITS 4 /* How many bits in minor number are reserved - * for the single card - */ -/* The following depends on CARD_MINOR_BITS. Unfortunately, the "MODULE_STRING" - * macro doesn't like anything other than the raw number as an argument :-( - */ -#define MAX_CARDS 16 -/* #define MAX_CARDS (1 << (8-CARD_MINOR_BITS)) */ - -#define DRIVER_RX_READY 0x0001 -#define DRIVER_TX_READY 0x0002 -#define DRIVER_TXMAP_SHIFT 2 -#define DRIVER_TXMAP_MASK 0x0c /* FIXME: 0xfc for 8-channel version */ - -/* for cosa->rxtx - indicates whether either transmit or receive is - * in progress. These values are mean number of the bit. - */ -#define TXBIT 0 -#define RXBIT 1 -#define IRQBIT 2 - -#define COSA_MTU 2000 /* FIXME: I don't know this exactly */ - -#undef DEBUG_DATA //1 /* Dump the data read or written to the channel */ -#undef DEBUG_IRQS //1 /* Print the message when the IRQ is received */ -#undef DEBUG_IO //1 /* Dump the I/O traffic */ - -#define TX_TIMEOUT (5 * HZ) - -/* Maybe the following should be allocated dynamically */ -static struct cosa_data cosa_cards[MAX_CARDS]; -static int nr_cards; - -#ifdef COSA_ISA_AUTOPROBE -static int io[MAX_CARDS + 1] = {0x220, 0x228, 0x210, 0x218, 0,}; -/* NOTE: DMA is not autoprobed!!! */ -static int dma[MAX_CARDS + 1] = {1, 7, 1, 7, 1, 7, 1, 7, 0,}; -#else -static int io[MAX_CARDS + 1]; -static int dma[MAX_CARDS + 1]; -#endif -/* IRQ can be safely autoprobed */ -static int irq[MAX_CARDS + 1] = {-1, -1, -1, -1, -1, -1, 0,}; - -/* for class stuff*/ -static struct class *cosa_class; - -#ifdef MODULE -module_param_hw_array(io, int, ioport, NULL, 0); -MODULE_PARM_DESC(io, "The I/O bases of the COSA or SRP cards"); -module_param_hw_array(irq, int, irq, NULL, 0); -MODULE_PARM_DESC(irq, "The IRQ lines of the COSA or SRP cards"); -module_param_hw_array(dma, int, dma, NULL, 0); -MODULE_PARM_DESC(dma, "The DMA channels of the COSA or SRP cards"); - -MODULE_AUTHOR("Jan \"Yenya\" Kasprzak, <kas@xxxxxxxxxx>"); -MODULE_DESCRIPTION("Modular driver for the COSA or SRP synchronous card"); -MODULE_LICENSE("GPL"); -#endif - -/* I use this mainly for testing purposes */ -#ifdef COSA_SLOW_IO -#define cosa_outb outb_p -#define cosa_outw outw_p -#define cosa_inb inb_p -#define cosa_inw inw_p -#else -#define cosa_outb outb -#define cosa_outw outw -#define cosa_inb inb -#define cosa_inw inw -#endif - -#define is_8bit(cosa) (!((cosa)->datareg & 0x08)) - -#define cosa_getstatus(cosa) (cosa_inb((cosa)->statusreg)) -#define cosa_putstatus(cosa, stat) (cosa_outb(stat, (cosa)->statusreg)) -#define cosa_getdata16(cosa) (cosa_inw((cosa)->datareg)) -#define cosa_getdata8(cosa) (cosa_inb((cosa)->datareg)) -#define cosa_putdata16(cosa, dt) (cosa_outw(dt, (cosa)->datareg)) -#define cosa_putdata8(cosa, dt) (cosa_outb(dt, (cosa)->datareg)) - -/* Initialization stuff */ -static int cosa_probe(int ioaddr, int irq, int dma); - -/* HW interface */ -static void cosa_enable_rx(struct channel_data *chan); -static void cosa_disable_rx(struct channel_data *chan); -static int cosa_start_tx(struct channel_data *channel, char *buf, int size); -static void cosa_kick(struct cosa_data *cosa); -static int cosa_dma_able(struct channel_data *chan, char *buf, int data); - -/* Network device stuff */ -static int cosa_net_attach(struct net_device *dev, unsigned short encoding, - unsigned short parity); -static int cosa_net_open(struct net_device *d); -static int cosa_net_close(struct net_device *d); -static void cosa_net_timeout(struct net_device *d, unsigned int txqueue); -static netdev_tx_t cosa_net_tx(struct sk_buff *skb, struct net_device *d); -static char *cosa_net_setup_rx(struct channel_data *channel, int size); -static int cosa_net_rx_done(struct channel_data *channel); -static int cosa_net_tx_done(struct channel_data *channel, int size); - -/* Character device */ -static char *chrdev_setup_rx(struct channel_data *channel, int size); -static int chrdev_rx_done(struct channel_data *channel); -static int chrdev_tx_done(struct channel_data *channel, int size); -static ssize_t cosa_read(struct file *file, - char __user *buf, size_t count, loff_t *ppos); -static ssize_t cosa_write(struct file *file, - const char __user *buf, size_t count, loff_t *ppos); -static unsigned int cosa_poll(struct file *file, poll_table *poll); -static int cosa_open(struct inode *inode, struct file *file); -static int cosa_release(struct inode *inode, struct file *file); -static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, - unsigned long arg); -#ifdef COSA_FASYNC_WORKING -static int cosa_fasync(struct inode *inode, struct file *file, int on); -#endif - -static const struct file_operations cosa_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .read = cosa_read, - .write = cosa_write, - .poll = cosa_poll, - .unlocked_ioctl = cosa_chardev_ioctl, - .open = cosa_open, - .release = cosa_release, -#ifdef COSA_FASYNC_WORKING - .fasync = cosa_fasync, -#endif -}; - -/* Ioctls */ -static int cosa_start(struct cosa_data *cosa, int address); -static int cosa_reset(struct cosa_data *cosa); -static int cosa_download(struct cosa_data *cosa, void __user *a); -static int cosa_readmem(struct cosa_data *cosa, void __user *a); - -/* COSA/SRP ROM monitor */ -static int download(struct cosa_data *cosa, const char __user *data, int addr, int len); -static int startmicrocode(struct cosa_data *cosa, int address); -static int readmem(struct cosa_data *cosa, char __user *data, int addr, int len); -static int cosa_reset_and_read_id(struct cosa_data *cosa, char *id); - -/* Auxiliary functions */ -static int get_wait_data(struct cosa_data *cosa); -static int put_wait_data(struct cosa_data *cosa, int data); -static int puthexnumber(struct cosa_data *cosa, int number); -static void put_driver_status(struct cosa_data *cosa); -static void put_driver_status_nolock(struct cosa_data *cosa); - -/* Interrupt handling */ -static irqreturn_t cosa_interrupt(int irq, void *cosa); - -/* I/O ops debugging */ -#ifdef DEBUG_IO -static void debug_data_in(struct cosa_data *cosa, int data); -static void debug_data_out(struct cosa_data *cosa, int data); -static void debug_data_cmd(struct cosa_data *cosa, int data); -static void debug_status_in(struct cosa_data *cosa, int status); -static void debug_status_out(struct cosa_data *cosa, int status); -#endif - -static inline struct channel_data *dev_to_chan(struct net_device *dev) -{ - return (struct channel_data *)dev_to_hdlc(dev)->priv; -} - -/* ---------- Initialization stuff ---------- */ - -static int __init cosa_init(void) -{ - int i, err = 0; - - if (cosa_major > 0) { - if (register_chrdev(cosa_major, "cosa", &cosa_fops)) { - pr_warn("unable to get major %d\n", cosa_major); - err = -EIO; - goto out; - } - } else { - cosa_major = register_chrdev(0, "cosa", &cosa_fops); - if (!cosa_major) { - pr_warn("unable to register chardev\n"); - err = -EIO; - goto out; - } - } - for (i = 0; i < MAX_CARDS; i++) - cosa_cards[i].num = -1; - for (i = 0; io[i] != 0 && i < MAX_CARDS; i++) - cosa_probe(io[i], irq[i], dma[i]); - if (!nr_cards) { - pr_warn("no devices found\n"); - unregister_chrdev(cosa_major, "cosa"); - err = -ENODEV; - goto out; - } - cosa_class = class_create(THIS_MODULE, "cosa"); - if (IS_ERR(cosa_class)) { - err = PTR_ERR(cosa_class); - goto out_chrdev; - } - for (i = 0; i < nr_cards; i++) - device_create(cosa_class, NULL, MKDEV(cosa_major, i), NULL, - "cosa%d", i); - err = 0; - goto out; - -out_chrdev: - unregister_chrdev(cosa_major, "cosa"); -out: - return err; -} -module_init(cosa_init); - -static void __exit cosa_exit(void) -{ - struct cosa_data *cosa; - int i; - - for (i = 0; i < nr_cards; i++) - device_destroy(cosa_class, MKDEV(cosa_major, i)); - class_destroy(cosa_class); - - for (cosa = cosa_cards; nr_cards--; cosa++) { - /* Clean up the per-channel data */ - for (i = 0; i < cosa->nchannels; i++) { - /* Chardev driver has no alloc'd per-channel data */ - unregister_hdlc_device(cosa->chan[i].netdev); - free_netdev(cosa->chan[i].netdev); - } - /* Clean up the per-card data */ - kfree(cosa->chan); - kfree(cosa->bouncebuf); - free_irq(cosa->irq, cosa); - free_dma(cosa->dma); - release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4); - } - unregister_chrdev(cosa_major, "cosa"); -} -module_exit(cosa_exit); - -static const struct net_device_ops cosa_ops = { - .ndo_open = cosa_net_open, - .ndo_stop = cosa_net_close, - .ndo_start_xmit = hdlc_start_xmit, - .ndo_siocwandev = hdlc_ioctl, - .ndo_tx_timeout = cosa_net_timeout, -}; - -static int cosa_probe(int base, int irq, int dma) -{ - struct cosa_data *cosa = cosa_cards + nr_cards; - int i, err = 0; - - memset(cosa, 0, sizeof(struct cosa_data)); - - /* Checking validity of parameters: */ - /* IRQ should be 2-7 or 10-15; negative IRQ means autoprobe */ - if ((irq >= 0 && irq < 2) || irq > 15 || (irq < 10 && irq > 7)) { - pr_info("invalid IRQ %d\n", irq); - return -1; - } - /* I/O address should be between 0x100 and 0x3ff and should be - * multiple of 8. - */ - if (base < 0x100 || base > 0x3ff || base & 0x7) { - pr_info("invalid I/O address 0x%x\n", base); - return -1; - } - /* DMA should be 0,1 or 3-7 */ - if (dma < 0 || dma == 4 || dma > 7) { - pr_info("invalid DMA %d\n", dma); - return -1; - } - /* and finally, on 16-bit COSA DMA should be 4-7 and - * I/O base should not be multiple of 0x10 - */ - if (((base & 0x8) && dma < 4) || (!(base & 0x8) && dma > 3)) { - pr_info("8/16 bit base and DMA mismatch (base=0x%x, dma=%d)\n", - base, dma); - return -1; - } - - cosa->dma = dma; - cosa->datareg = base; - cosa->statusreg = is_8bit(cosa) ? base + 1 : base + 2; - spin_lock_init(&cosa->lock); - - if (!request_region(base, is_8bit(cosa) ? 2 : 4, "cosa")) - return -1; - - if (cosa_reset_and_read_id(cosa, cosa->id_string) < 0) { - printk(KERN_DEBUG "probe at 0x%x failed.\n", base); - err = -1; - goto err_out; - } - - /* Test the validity of identification string */ - if (!strncmp(cosa->id_string, "SRP", 3)) { - cosa->type = "srp"; - } else if (!strncmp(cosa->id_string, "COSA", 4)) { - cosa->type = is_8bit(cosa) ? "cosa8" : "cosa16"; - } else { -/* Print a warning only if we are not autoprobing */ -#ifndef COSA_ISA_AUTOPROBE - pr_info("valid signature not found at 0x%x\n", base); -#endif - err = -1; - goto err_out; - } - /* Update the name of the region now we know the type of card */ - release_region(base, is_8bit(cosa) ? 2 : 4); - if (!request_region(base, is_8bit(cosa) ? 2 : 4, cosa->type)) { - printk(KERN_DEBUG "changing name at 0x%x failed.\n", base); - return -1; - } - - /* Now do IRQ autoprobe */ - if (irq < 0) { - unsigned long irqs; -/* pr_info("IRQ autoprobe\n"); */ - irqs = probe_irq_on(); - /* Enable interrupt on tx buffer empty (it sure is) - * really sure ? - * FIXME: When this code is not used as module, we should - * probably call udelay() instead of the interruptible sleep. - */ - set_current_state(TASK_INTERRUPTIBLE); - cosa_putstatus(cosa, SR_TX_INT_ENA); - schedule_timeout(msecs_to_jiffies(300)); - irq = probe_irq_off(irqs); - /* Disable all IRQs from the card */ - cosa_putstatus(cosa, 0); - /* Empty the received data register */ - cosa_getdata8(cosa); - - if (irq < 0) { - pr_info("multiple interrupts obtained (%d, board at 0x%x)\n", - irq, cosa->datareg); - err = -1; - goto err_out; - } - if (irq == 0) { - pr_info("no interrupt obtained (board at 0x%x)\n", - cosa->datareg); - /* return -1; */ - } - } - - cosa->irq = irq; - cosa->num = nr_cards; - cosa->usage = 0; - cosa->nchannels = 2; /* FIXME: how to determine this? */ - - if (request_irq(cosa->irq, cosa_interrupt, 0, cosa->type, cosa)) { - err = -1; - goto err_out; - } - if (request_dma(cosa->dma, cosa->type)) { - err = -1; - goto err_out1; - } - - cosa->bouncebuf = kmalloc(COSA_MTU, GFP_KERNEL | GFP_DMA); - if (!cosa->bouncebuf) { - err = -ENOMEM; - goto err_out2; - } - sprintf(cosa->name, "cosa%d", cosa->num); - - /* Initialize the per-channel data */ - cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL); - if (!cosa->chan) { - err = -ENOMEM; - goto err_out3; - } - - for (i = 0; i < cosa->nchannels; i++) { - struct channel_data *chan = &cosa->chan[i]; - - chan->cosa = cosa; - chan->num = i; - sprintf(chan->name, "cosa%dc%d", chan->cosa->num, i); - - /* Initialize the chardev data structures */ - mutex_init(&chan->rlock); - sema_init(&chan->wsem, 1); - - /* Register the network interface */ - chan->netdev = alloc_hdlcdev(chan); - if (!chan->netdev) { - pr_warn("%s: alloc_hdlcdev failed\n", chan->name); - err = -ENOMEM; - goto err_hdlcdev; - } - dev_to_hdlc(chan->netdev)->attach = cosa_net_attach; - dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx; - chan->netdev->netdev_ops = &cosa_ops; - chan->netdev->watchdog_timeo = TX_TIMEOUT; - chan->netdev->base_addr = chan->cosa->datareg; - chan->netdev->irq = chan->cosa->irq; - chan->netdev->dma = chan->cosa->dma; - err = register_hdlc_device(chan->netdev); - if (err) { - netdev_warn(chan->netdev, - "register_hdlc_device() failed\n"); - free_netdev(chan->netdev); - goto err_hdlcdev; - } - } - - pr_info("cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n", - cosa->num, cosa->id_string, cosa->type, - cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels); - - return nr_cards++; - -err_hdlcdev: - while (i-- > 0) { - unregister_hdlc_device(cosa->chan[i].netdev); - free_netdev(cosa->chan[i].netdev); - } - kfree(cosa->chan); -err_out3: - kfree(cosa->bouncebuf); -err_out2: - free_dma(cosa->dma); -err_out1: - free_irq(cosa->irq, cosa); -err_out: - release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4); - pr_notice("cosa%d: allocating resources failed\n", cosa->num); - return err; -} - -/*---------- network device ---------- */ - -static int cosa_net_attach(struct net_device *dev, unsigned short encoding, - unsigned short parity) -{ - if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT) - return 0; - return -EINVAL; -} - -static int cosa_net_open(struct net_device *dev) -{ - struct channel_data *chan = dev_to_chan(dev); - int err; - unsigned long flags; - - if (!(chan->cosa->firmware_status & COSA_FW_START)) { - pr_notice("%s: start the firmware first (status %d)\n", - chan->cosa->name, chan->cosa->firmware_status); - return -EPERM; - } - spin_lock_irqsave(&chan->cosa->lock, flags); - if (chan->usage != 0) { - pr_warn("%s: cosa_net_open called with usage count %d\n", - chan->name, chan->usage); - spin_unlock_irqrestore(&chan->cosa->lock, flags); - return -EBUSY; - } - chan->setup_rx = cosa_net_setup_rx; - chan->tx_done = cosa_net_tx_done; - chan->rx_done = cosa_net_rx_done; - chan->usage = -1; - chan->cosa->usage++; - spin_unlock_irqrestore(&chan->cosa->lock, flags); - - err = hdlc_open(dev); - if (err) { - spin_lock_irqsave(&chan->cosa->lock, flags); - chan->usage = 0; - chan->cosa->usage--; - spin_unlock_irqrestore(&chan->cosa->lock, flags); - return err; - } - - netif_start_queue(dev); - cosa_enable_rx(chan); - return 0; -} - -static netdev_tx_t cosa_net_tx(struct sk_buff *skb, - struct net_device *dev) -{ - struct channel_data *chan = dev_to_chan(dev); - - netif_stop_queue(dev); - - chan->tx_skb = skb; - cosa_start_tx(chan, skb->data, skb->len); - return NETDEV_TX_OK; -} - -static void cosa_net_timeout(struct net_device *dev, unsigned int txqueue) -{ - struct channel_data *chan = dev_to_chan(dev); - - if (test_bit(RXBIT, &chan->cosa->rxtx)) { - chan->netdev->stats.rx_errors++; - chan->netdev->stats.rx_missed_errors++; - } else { - chan->netdev->stats.tx_errors++; - chan->netdev->stats.tx_aborted_errors++; - } - cosa_kick(chan->cosa); - if (chan->tx_skb) { - dev_kfree_skb(chan->tx_skb); - chan->tx_skb = NULL; - } - netif_wake_queue(dev); -} - -static int cosa_net_close(struct net_device *dev) -{ - struct channel_data *chan = dev_to_chan(dev); - unsigned long flags; - - netif_stop_queue(dev); - hdlc_close(dev); - cosa_disable_rx(chan); - spin_lock_irqsave(&chan->cosa->lock, flags); - if (chan->rx_skb) { - kfree_skb(chan->rx_skb); - chan->rx_skb = NULL; - } - if (chan->tx_skb) { - kfree_skb(chan->tx_skb); - chan->tx_skb = NULL; - } - chan->usage = 0; - chan->cosa->usage--; - spin_unlock_irqrestore(&chan->cosa->lock, flags); - return 0; -} - -static char *cosa_net_setup_rx(struct channel_data *chan, int size) -{ - /* We can safely fall back to non-dma-able memory, because we have - * the cosa->bouncebuf pre-allocated. - */ - kfree_skb(chan->rx_skb); - chan->rx_skb = dev_alloc_skb(size); - if (!chan->rx_skb) { - pr_notice("%s: Memory squeeze, dropping packet\n", chan->name); - chan->netdev->stats.rx_dropped++; - return NULL; - } - netif_trans_update(chan->netdev); - return skb_put(chan->rx_skb, size); -} - -static int cosa_net_rx_done(struct channel_data *chan) -{ - if (!chan->rx_skb) { - pr_warn("%s: rx_done with empty skb!\n", chan->name); - chan->netdev->stats.rx_errors++; - chan->netdev->stats.rx_frame_errors++; - return 0; - } - chan->rx_skb->protocol = hdlc_type_trans(chan->rx_skb, chan->netdev); - chan->rx_skb->dev = chan->netdev; - skb_reset_mac_header(chan->rx_skb); - chan->netdev->stats.rx_packets++; - chan->netdev->stats.rx_bytes += chan->cosa->rxsize; - netif_rx(chan->rx_skb); - chan->rx_skb = NULL; - return 0; -} - -/* ARGSUSED */ -static int cosa_net_tx_done(struct channel_data *chan, int size) -{ - if (!chan->tx_skb) { - pr_warn("%s: tx_done with empty skb!\n", chan->name); - chan->netdev->stats.tx_errors++; - chan->netdev->stats.tx_aborted_errors++; - return 1; - } - dev_consume_skb_irq(chan->tx_skb); - chan->tx_skb = NULL; - chan->netdev->stats.tx_packets++; - chan->netdev->stats.tx_bytes += size; - netif_wake_queue(chan->netdev); - return 1; -} - -/*---------- Character device ---------- */ - -static ssize_t cosa_read(struct file *file, - char __user *buf, size_t count, loff_t *ppos) -{ - DECLARE_WAITQUEUE(wait, current); - unsigned long flags; - struct channel_data *chan = file->private_data; - struct cosa_data *cosa = chan->cosa; - char *kbuf; - - if (!(cosa->firmware_status & COSA_FW_START)) { - pr_notice("%s: start the firmware first (status %d)\n", - cosa->name, cosa->firmware_status); - return -EPERM; - } - if (mutex_lock_interruptible(&chan->rlock)) - return -ERESTARTSYS; - - chan->rxdata = kmalloc(COSA_MTU, GFP_DMA | GFP_KERNEL); - if (!chan->rxdata) { - mutex_unlock(&chan->rlock); - return -ENOMEM; - } - - chan->rx_status = 0; - cosa_enable_rx(chan); - spin_lock_irqsave(&cosa->lock, flags); - add_wait_queue(&chan->rxwaitq, &wait); - while (!chan->rx_status) { - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&cosa->lock, flags); - schedule(); - spin_lock_irqsave(&cosa->lock, flags); - if (signal_pending(current) && chan->rx_status == 0) { - chan->rx_status = 1; - remove_wait_queue(&chan->rxwaitq, &wait); - __set_current_state(TASK_RUNNING); - spin_unlock_irqrestore(&cosa->lock, flags); - mutex_unlock(&chan->rlock); - return -ERESTARTSYS; - } - } - remove_wait_queue(&chan->rxwaitq, &wait); - __set_current_state(TASK_RUNNING); - kbuf = chan->rxdata; - count = chan->rxsize; - spin_unlock_irqrestore(&cosa->lock, flags); - mutex_unlock(&chan->rlock); - - if (copy_to_user(buf, kbuf, count)) { - kfree(kbuf); - return -EFAULT; - } - kfree(kbuf); - return count; -} - -static char *chrdev_setup_rx(struct channel_data *chan, int size) -{ - /* Expect size <= COSA_MTU */ - chan->rxsize = size; - return chan->rxdata; -} - -static int chrdev_rx_done(struct channel_data *chan) -{ - if (chan->rx_status) { /* Reader has died */ - kfree(chan->rxdata); - up(&chan->wsem); - } - chan->rx_status = 1; - wake_up_interruptible(&chan->rxwaitq); - return 1; -} - -static ssize_t cosa_write(struct file *file, - const char __user *buf, size_t count, loff_t *ppos) -{ - DECLARE_WAITQUEUE(wait, current); - struct channel_data *chan = file->private_data; - struct cosa_data *cosa = chan->cosa; - unsigned long flags; - char *kbuf; - - if (!(cosa->firmware_status & COSA_FW_START)) { - pr_notice("%s: start the firmware first (status %d)\n", - cosa->name, cosa->firmware_status); - return -EPERM; - } - if (down_interruptible(&chan->wsem)) - return -ERESTARTSYS; - - if (count > COSA_MTU) - count = COSA_MTU; - - /* Allocate the buffer */ - kbuf = kmalloc(count, GFP_KERNEL | GFP_DMA); - if (!kbuf) { - up(&chan->wsem); - return -ENOMEM; - } - if (copy_from_user(kbuf, buf, count)) { - up(&chan->wsem); - kfree(kbuf); - return -EFAULT; - } - chan->tx_status = 0; - cosa_start_tx(chan, kbuf, count); - - spin_lock_irqsave(&cosa->lock, flags); - add_wait_queue(&chan->txwaitq, &wait); - while (!chan->tx_status) { - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&cosa->lock, flags); - schedule(); - spin_lock_irqsave(&cosa->lock, flags); - if (signal_pending(current) && chan->tx_status == 0) { - chan->tx_status = 1; - remove_wait_queue(&chan->txwaitq, &wait); - __set_current_state(TASK_RUNNING); - chan->tx_status = 1; - spin_unlock_irqrestore(&cosa->lock, flags); - up(&chan->wsem); - kfree(kbuf); - return -ERESTARTSYS; - } - } - remove_wait_queue(&chan->txwaitq, &wait); - __set_current_state(TASK_RUNNING); - up(&chan->wsem); - spin_unlock_irqrestore(&cosa->lock, flags); - kfree(kbuf); - return count; -} - -static int chrdev_tx_done(struct channel_data *chan, int size) -{ - if (chan->tx_status) { /* Writer was interrupted */ - kfree(chan->txbuf); - up(&chan->wsem); - } - chan->tx_status = 1; - wake_up_interruptible(&chan->txwaitq); - return 1; -} - -static __poll_t cosa_poll(struct file *file, poll_table *poll) -{ - pr_info("cosa_poll is here\n"); - return 0; -} - -static int cosa_open(struct inode *inode, struct file *file) -{ - struct cosa_data *cosa; - struct channel_data *chan; - unsigned long flags; - int n; - int ret = 0; - - mutex_lock(&cosa_chardev_mutex); - n = iminor(file_inode(file)) >> CARD_MINOR_BITS; - if (n >= nr_cards) { - ret = -ENODEV; - goto out; - } - cosa = cosa_cards + n; - - n = iminor(file_inode(file)) & ((1 << CARD_MINOR_BITS) - 1); - if (n >= cosa->nchannels) { - ret = -ENODEV; - goto out; - } - chan = cosa->chan + n; - - file->private_data = chan; - - spin_lock_irqsave(&cosa->lock, flags); - - if (chan->usage < 0) { /* in netdev mode */ - spin_unlock_irqrestore(&cosa->lock, flags); - ret = -EBUSY; - goto out; - } - cosa->usage++; - chan->usage++; - - chan->tx_done = chrdev_tx_done; - chan->setup_rx = chrdev_setup_rx; - chan->rx_done = chrdev_rx_done; - spin_unlock_irqrestore(&cosa->lock, flags); -out: - mutex_unlock(&cosa_chardev_mutex); - return ret; -} - -static int cosa_release(struct inode *inode, struct file *file) -{ - struct channel_data *channel = file->private_data; - struct cosa_data *cosa; - unsigned long flags; - - cosa = channel->cosa; - spin_lock_irqsave(&cosa->lock, flags); - cosa->usage--; - channel->usage--; - spin_unlock_irqrestore(&cosa->lock, flags); - return 0; -} - -#ifdef COSA_FASYNC_WORKING -static struct fasync_struct *fasync[256] = { NULL, }; - -/* To be done ... */ -static int cosa_fasync(struct inode *inode, struct file *file, int on) -{ - int port = iminor(inode); - - return fasync_helper(inode, file, on, &fasync[port]); -} -#endif - -/* ---------- Ioctls ---------- */ - -/* Ioctl subroutines can safely be made inline, because they are called - * only from cosa_ioctl(). - */ -static inline int cosa_reset(struct cosa_data *cosa) -{ - char idstring[COSA_MAX_ID_STRING]; - - if (cosa->usage > 1) - pr_info("cosa%d: WARNING: reset requested with cosa->usage > 1 (%d). Odd things may happen.\n", - cosa->num, cosa->usage); - cosa->firmware_status &= ~(COSA_FW_RESET | COSA_FW_START); - if (cosa_reset_and_read_id(cosa, idstring) < 0) { - pr_notice("cosa%d: reset failed\n", cosa->num); - return -EIO; - } - pr_info("cosa%d: resetting device: %s\n", cosa->num, idstring); - cosa->firmware_status |= COSA_FW_RESET; - return 0; -} - -/* High-level function to download data into COSA memory. Calls download() */ -static inline int cosa_download(struct cosa_data *cosa, void __user *arg) -{ - struct cosa_download d; - int i; - - if (cosa->usage > 1) - pr_info("%s: WARNING: download of microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", - cosa->name, cosa->usage); - if (!(cosa->firmware_status & COSA_FW_RESET)) { - pr_notice("%s: reset the card first (status %d)\n", - cosa->name, cosa->firmware_status); - return -EPERM; - } - - if (copy_from_user(&d, arg, sizeof(d))) - return -EFAULT; - - if (d.addr < 0 || d.addr > COSA_MAX_FIRMWARE_SIZE) - return -EINVAL; - if (d.len < 0 || d.len > COSA_MAX_FIRMWARE_SIZE) - return -EINVAL; - - /* If something fails, force the user to reset the card */ - cosa->firmware_status &= ~(COSA_FW_RESET | COSA_FW_DOWNLOAD); - - i = download(cosa, d.code, d.len, d.addr); - if (i < 0) { - pr_notice("cosa%d: microcode download failed: %d\n", - cosa->num, i); - return -EIO; - } - pr_info("cosa%d: downloading microcode - 0x%04x bytes at 0x%04x\n", - cosa->num, d.len, d.addr); - cosa->firmware_status |= COSA_FW_RESET | COSA_FW_DOWNLOAD; - return 0; -} - -/* High-level function to read COSA memory. Calls readmem() */ -static inline int cosa_readmem(struct cosa_data *cosa, void __user *arg) -{ - struct cosa_download d; - int i; - - if (cosa->usage > 1) - pr_info("cosa%d: WARNING: readmem requested with cosa->usage > 1 (%d). Odd things may happen.\n", - cosa->num, cosa->usage); - if (!(cosa->firmware_status & COSA_FW_RESET)) { - pr_notice("%s: reset the card first (status %d)\n", - cosa->name, cosa->firmware_status); - return -EPERM; - } - - if (copy_from_user(&d, arg, sizeof(d))) - return -EFAULT; - - /* If something fails, force the user to reset the card */ - cosa->firmware_status &= ~COSA_FW_RESET; - - i = readmem(cosa, d.code, d.len, d.addr); - if (i < 0) { - pr_notice("cosa%d: reading memory failed: %d\n", cosa->num, i); - return -EIO; - } - pr_info("cosa%d: reading card memory - 0x%04x bytes at 0x%04x\n", - cosa->num, d.len, d.addr); - cosa->firmware_status |= COSA_FW_RESET; - return 0; -} - -/* High-level function to start microcode. Calls startmicrocode(). */ -static inline int cosa_start(struct cosa_data *cosa, int address) -{ - int i; - - if (cosa->usage > 1) - pr_info("cosa%d: WARNING: start microcode requested with cosa->usage > 1 (%d). Odd things may happen.\n", - cosa->num, cosa->usage); - - if ((cosa->firmware_status & (COSA_FW_RESET | COSA_FW_DOWNLOAD)) - != (COSA_FW_RESET | COSA_FW_DOWNLOAD)) { - pr_notice("%s: download the microcode and/or reset the card first (status %d)\n", - cosa->name, cosa->firmware_status); - return -EPERM; - } - cosa->firmware_status &= ~COSA_FW_RESET; - i = startmicrocode(cosa, address); - if (i < 0) { - pr_notice("cosa%d: start microcode at 0x%04x failed: %d\n", - cosa->num, address, i); - return -EIO; - } - pr_info("cosa%d: starting microcode at 0x%04x\n", cosa->num, address); - cosa->startaddr = address; - cosa->firmware_status |= COSA_FW_START; - return 0; -} - -/* Buffer of size at least COSA_MAX_ID_STRING is expected */ -static inline int cosa_getidstr(struct cosa_data *cosa, char __user *string) -{ - int l = strlen(cosa->id_string) + 1; - - if (copy_to_user(string, cosa->id_string, l)) - return -EFAULT; - return l; -} - -/* Buffer of size at least COSA_MAX_ID_STRING is expected */ -static inline int cosa_gettype(struct cosa_data *cosa, char __user *string) -{ - int l = strlen(cosa->type) + 1; - - if (copy_to_user(string, cosa->type, l)) - return -EFAULT; - return l; -} - -static int cosa_ioctl_common(struct cosa_data *cosa, - struct channel_data *channel, unsigned int cmd, - unsigned long arg) -{ - void __user *argp = (void __user *)arg; - - switch (cmd) { - case COSAIORSET: /* Reset the device */ - if (!capable(CAP_NET_ADMIN)) - return -EACCES; - return cosa_reset(cosa); - case COSAIOSTRT: /* Start the firmware */ - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - return cosa_start(cosa, arg); - case COSAIODOWNLD: /* Download the firmware */ - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - - return cosa_download(cosa, argp); - case COSAIORMEM: - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - return cosa_readmem(cosa, argp); - case COSAIORTYPE: - return cosa_gettype(cosa, argp); - case COSAIORIDSTR: - return cosa_getidstr(cosa, argp); - case COSAIONRCARDS: - return nr_cards; - case COSAIONRCHANS: - return cosa->nchannels; - case COSAIOBMSET: - if (!capable(CAP_SYS_RAWIO)) - return -EACCES; - if (is_8bit(cosa)) - return -EINVAL; - if (arg != COSA_BM_OFF && arg != COSA_BM_ON) - return -EINVAL; - cosa->busmaster = arg; - return 0; - case COSAIOBMGET: - return cosa->busmaster; - } - return -ENOIOCTLCMD; -} - -static long cosa_chardev_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - struct channel_data *channel = file->private_data; - struct cosa_data *cosa; - long ret; - - mutex_lock(&cosa_chardev_mutex); - cosa = channel->cosa; - ret = cosa_ioctl_common(cosa, channel, cmd, arg); - mutex_unlock(&cosa_chardev_mutex); - return ret; -} - -/*---------- HW layer interface ---------- */ - -/* The higher layer can bind itself to the HW layer by setting the callbacks - * in the channel_data structure and by using these routines. - */ -static void cosa_enable_rx(struct channel_data *chan) -{ - struct cosa_data *cosa = chan->cosa; - - if (!test_and_set_bit(chan->num, &cosa->rxbitmap)) - put_driver_status(cosa); -} - -static void cosa_disable_rx(struct channel_data *chan) -{ - struct cosa_data *cosa = chan->cosa; - - if (test_and_clear_bit(chan->num, &cosa->rxbitmap)) - put_driver_status(cosa); -} - -/* FIXME: This routine probably should check for cosa_start_tx() called when - * the previous transmit is still unfinished. In this case the non-zero - * return value should indicate to the caller that the queuing(sp?) up - * the transmit has failed. - */ -static int cosa_start_tx(struct channel_data *chan, char *buf, int len) -{ - struct cosa_data *cosa = chan->cosa; - unsigned long flags; -#ifdef DEBUG_DATA - int i; - - pr_info("cosa%dc%d: starting tx(0x%x)", - chan->cosa->num, chan->num, len); - for (i = 0; i < len; i++) - pr_cont(" %02x", buf[i]&0xff); - pr_cont("\n"); -#endif - spin_lock_irqsave(&cosa->lock, flags); - chan->txbuf = buf; - chan->txsize = len; - if (len > COSA_MTU) - chan->txsize = COSA_MTU; - spin_unlock_irqrestore(&cosa->lock, flags); - - /* Tell the firmware we are ready */ - set_bit(chan->num, &cosa->txbitmap); - put_driver_status(cosa); - - return 0; -} - -static void put_driver_status(struct cosa_data *cosa) -{ - unsigned long flags; - int status; - - spin_lock_irqsave(&cosa->lock, flags); - - status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) - | (cosa->txbitmap ? DRIVER_TX_READY : 0) - | (cosa->txbitmap ? ~(cosa->txbitmap << DRIVER_TXMAP_SHIFT) - & DRIVER_TXMAP_MASK : 0); - if (!cosa->rxtx) { - if (cosa->rxbitmap | cosa->txbitmap) { - if (!cosa->enabled) { - cosa_putstatus(cosa, SR_RX_INT_ENA); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_RX_INT_ENA); -#endif - cosa->enabled = 1; - } - } else if (cosa->enabled) { - cosa->enabled = 0; - cosa_putstatus(cosa, 0); -#ifdef DEBUG_IO - debug_status_out(cosa, 0); -#endif - } - cosa_putdata8(cosa, status); -#ifdef DEBUG_IO - debug_data_cmd(cosa, status); -#endif - } - spin_unlock_irqrestore(&cosa->lock, flags); -} - -static void put_driver_status_nolock(struct cosa_data *cosa) -{ - int status; - - status = (cosa->rxbitmap ? DRIVER_RX_READY : 0) - | (cosa->txbitmap ? DRIVER_TX_READY : 0) - | (cosa->txbitmap ? ~(cosa->txbitmap << DRIVER_TXMAP_SHIFT) - & DRIVER_TXMAP_MASK : 0); - - if (cosa->rxbitmap | cosa->txbitmap) { - cosa_putstatus(cosa, SR_RX_INT_ENA); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_RX_INT_ENA); -#endif - cosa->enabled = 1; - } else { - cosa_putstatus(cosa, 0); -#ifdef DEBUG_IO - debug_status_out(cosa, 0); -#endif - cosa->enabled = 0; - } - cosa_putdata8(cosa, status); -#ifdef DEBUG_IO - debug_data_cmd(cosa, status); -#endif -} - -/* The "kickme" function: When the DMA times out, this is called to - * clean up the driver status. - * FIXME: Preliminary support, the interface is probably wrong. - */ -static void cosa_kick(struct cosa_data *cosa) -{ - unsigned long flags, flags1; - char *s = "(probably) IRQ"; - - if (test_bit(RXBIT, &cosa->rxtx)) - s = "RX DMA"; - if (test_bit(TXBIT, &cosa->rxtx)) - s = "TX DMA"; - - pr_info("%s: %s timeout - restarting\n", cosa->name, s); - spin_lock_irqsave(&cosa->lock, flags); - cosa->rxtx = 0; - - flags1 = claim_dma_lock(); - disable_dma(cosa->dma); - clear_dma_ff(cosa->dma); - release_dma_lock(flags1); - - /* FIXME: Anything else? */ - udelay(100); - cosa_putstatus(cosa, 0); - udelay(100); - (void)cosa_getdata8(cosa); - udelay(100); - cosa_putdata8(cosa, 0); - udelay(100); - put_driver_status_nolock(cosa); - spin_unlock_irqrestore(&cosa->lock, flags); -} - -/* Check if the whole buffer is DMA-able. It means it is below the 16M of - * physical memory and doesn't span the 64k boundary. For now it seems - * SKB's never do this, but we'll check this anyway. - */ -static int cosa_dma_able(struct channel_data *chan, char *buf, int len) -{ - static int count; - unsigned long b = (unsigned long)buf; - - if (b + len >= MAX_DMA_ADDRESS) - return 0; - if ((b ^ (b + len)) & 0x10000) { - if (count++ < 5) - pr_info("%s: packet spanning a 64k boundary\n", - chan->name); - return 0; - } - return 1; -} - -/* ---------- The SRP/COSA ROM monitor functions ---------- */ - -/* Downloading SRP microcode: say "w" to SRP monitor, it answers by "w=", - * drivers need to say 4-digit hex number meaning start address of the microcode - * separated by a single space. Monitor replies by saying " =". Now driver - * has to write 4-digit hex number meaning the last byte address ended - * by a single space. Monitor has to reply with a space. Now the download - * begins. After the download monitor replies with "\r\n." (CR LF dot). - */ -static int download(struct cosa_data *cosa, const char __user *microcode, int length, int address) -{ - int i; - - if (put_wait_data(cosa, 'w') == -1) - return -1; - if ((i=get_wait_data(cosa)) != 'w') { printk("dnld: 0x%04x\n",i); return -2;} - if (get_wait_data(cosa) != '=') - return -3; - - if (puthexnumber(cosa, address) < 0) - return -4; - if (put_wait_data(cosa, ' ') == -1) - return -10; - if (get_wait_data(cosa) != ' ') - return -11; - if (get_wait_data(cosa) != '=') - return -12; - - if (puthexnumber(cosa, address + length - 1) < 0) - return -13; - if (put_wait_data(cosa, ' ') == -1) - return -18; - if (get_wait_data(cosa) != ' ') - return -19; - - while (length--) { - char c; -#ifndef SRP_DOWNLOAD_AT_BOOT - if (get_user(c, microcode)) - return -23; /* ??? */ -#else - c = *microcode; -#endif - if (put_wait_data(cosa, c) == -1) - return -20; - microcode++; - } - - if (get_wait_data(cosa) != '\r') - return -21; - if (get_wait_data(cosa) != '\n') - return -22; - if (get_wait_data(cosa) != '.') - return -23; -#if 0 - printk(KERN_DEBUG "cosa%d: download completed.\n", cosa->num); -#endif - return 0; -} - -/* Starting microcode is done via the "g" command of the SRP monitor. - * The chat should be the following: "g" "g=" "<addr><CR>" - * "<CR><CR><LF><CR><LF>". - */ -static int startmicrocode(struct cosa_data *cosa, int address) -{ - if (put_wait_data(cosa, 'g') == -1) - return -1; - if (get_wait_data(cosa) != 'g') - return -2; - if (get_wait_data(cosa) != '=') - return -3; - - if (puthexnumber(cosa, address) < 0) - return -4; - if (put_wait_data(cosa, '\r') == -1) - return -5; - - if (get_wait_data(cosa) != '\r') - return -6; - if (get_wait_data(cosa) != '\r') - return -7; - if (get_wait_data(cosa) != '\n') - return -8; - if (get_wait_data(cosa) != '\r') - return -9; - if (get_wait_data(cosa) != '\n') - return -10; -#if 0 - printk(KERN_DEBUG "cosa%d: microcode started\n", cosa->num); -#endif - return 0; -} - -/* Reading memory is done via the "r" command of the SRP monitor. - * The chat is the following "r" "r=" "<addr> " " =" "<last_byte> " " " - * Then driver can read the data and the conversation is finished - * by SRP monitor sending "<CR><LF>." (dot at the end). - * - * This routine is not needed during the normal operation and serves - * for debugging purposes only. - */ -static int readmem(struct cosa_data *cosa, char __user *microcode, int length, int address) -{ - if (put_wait_data(cosa, 'r') == -1) - return -1; - if ((get_wait_data(cosa)) != 'r') - return -2; - if ((get_wait_data(cosa)) != '=') - return -3; - - if (puthexnumber(cosa, address) < 0) - return -4; - if (put_wait_data(cosa, ' ') == -1) - return -5; - if (get_wait_data(cosa) != ' ') - return -6; - if (get_wait_data(cosa) != '=') - return -7; - - if (puthexnumber(cosa, address + length - 1) < 0) - return -8; - if (put_wait_data(cosa, ' ') == -1) - return -9; - if (get_wait_data(cosa) != ' ') - return -10; - - while (length--) { - char c; - int i; - - i = get_wait_data(cosa); - if (i == -1) { - pr_info("0x%04x bytes remaining\n", length); - return -11; - } - c = i; -#if 1 - if (put_user(c, microcode)) - return -23; /* ??? */ -#else - *microcode = c; -#endif - microcode++; - } - - if (get_wait_data(cosa) != '\r') - return -21; - if (get_wait_data(cosa) != '\n') - return -22; - if (get_wait_data(cosa) != '.') - return -23; -#if 0 - printk(KERN_DEBUG "cosa%d: readmem completed.\n", cosa->num); -#endif - return 0; -} - -/* This function resets the device and reads the initial prompt - * of the device's ROM monitor. - */ -static int cosa_reset_and_read_id(struct cosa_data *cosa, char *idstring) -{ - int i = 0, id = 0, prev = 0, curr = 0; - - /* Reset the card ... */ - cosa_putstatus(cosa, 0); - cosa_getdata8(cosa); - cosa_putstatus(cosa, SR_RST); - msleep(500); - /* Disable all IRQs from the card */ - cosa_putstatus(cosa, 0); - - /* Try to read the ID string. The card then prints out the - * identification string ended by the "\n\x2e". - * - * The following loop is indexed through i (instead of id) - * to avoid looping forever when for any reason - * the port returns '\r', '\n' or '\x2e' permanently. - */ - for (i = 0; i < COSA_MAX_ID_STRING - 1; i++, prev = curr) { - curr = get_wait_data(cosa); - if (curr == -1) - return -1; - - curr &= 0xff; - if (curr != '\r' && curr != '\n' && curr != 0x2e) - idstring[id++] = curr; - if (curr == 0x2e && prev == '\n') - break; - } - /* Perhaps we should fail when i==COSA_MAX_ID_STRING-1 ? */ - idstring[id] = '\0'; - return id; -} - -/* ---------- Auxiliary routines for COSA/SRP monitor ---------- */ - -/* This routine gets the data byte from the card waiting for the SR_RX_RDY - * bit to be set in a loop. It should be used in the exceptional cases - * only (for example when resetting the card or downloading the firmware. - */ -static int get_wait_data(struct cosa_data *cosa) -{ - int retries = 1000; - - while (--retries) { - /* read data and return them */ - if (cosa_getstatus(cosa) & SR_RX_RDY) { - short r; - - r = cosa_getdata8(cosa); -#if 0 - pr_info("get_wait_data returning after %d retries\n", - 999 - retries); -#endif - return r; - } - /* sleep if not ready to read */ - schedule_timeout_interruptible(1); - } - pr_info("timeout in get_wait_data (status 0x%x)\n", - cosa_getstatus(cosa)); - return -1; -} - -/* This routine puts the data byte to the card waiting for the SR_TX_RDY - * bit to be set in a loop. It should be used in the exceptional cases - * only (for example when resetting the card or downloading the firmware). - */ -static int put_wait_data(struct cosa_data *cosa, int data) -{ - int retries = 1000; - - while (--retries) { - /* read data and return them */ - if (cosa_getstatus(cosa) & SR_TX_RDY) { - cosa_putdata8(cosa, data); -#if 0 - pr_info("Putdata: %d retries\n", 999 - retries); -#endif - return 0; - } -#if 0 - /* sleep if not ready to read */ - schedule_timeout_interruptible(1); -#endif - } - pr_info("cosa%d: timeout in put_wait_data (status 0x%x)\n", - cosa->num, cosa_getstatus(cosa)); - return -1; -} - -/* The following routine puts the hexadecimal number into the SRP monitor - * and verifies the proper echo of the sent bytes. Returns 0 on success, - * negative number on failure (-1,-3,-5,-7) means that put_wait_data() failed, - * (-2,-4,-6,-8) means that reading echo failed. - */ -static int puthexnumber(struct cosa_data *cosa, int number) -{ - char temp[5]; - int i; - - /* Well, I should probably replace this by something faster. */ - sprintf(temp, "%04X", number); - for (i = 0; i < 4; i++) { - if (put_wait_data(cosa, temp[i]) == -1) { - pr_notice("cosa%d: puthexnumber failed to write byte %d\n", - cosa->num, i); - return -1 - 2 * i; - } - if (get_wait_data(cosa) != temp[i]) { - pr_notice("cosa%d: puthexhumber failed to read echo of byte %d\n", - cosa->num, i); - return -2 - 2 * i; - } - } - return 0; -} - -/* ---------- Interrupt routines ---------- */ - -/* There are three types of interrupt: - * At the beginning of transmit - this handled is in tx_interrupt(), - * at the beginning of receive - it is in rx_interrupt() and - * at the end of transmit/receive - it is the eot_interrupt() function. - * These functions are multiplexed by cosa_interrupt() according to the - * COSA status byte. I have moved the rx/tx/eot interrupt handling into - * separate functions to make it more readable. These functions are inline, - * so there should be no overhead of function call. - * - * In the COSA bus-master mode, we need to tell the card the address of a - * buffer. Unfortunately, COSA may be too slow for us, so we must busy-wait. - * It's time to use the bottom half :-( - */ - -/* Transmit interrupt routine - called when COSA is willing to obtain - * data from the OS. The most tricky part of the routine is selection - * of channel we (OS) want to send packet for. For SRP we should probably - * use the round-robin approach. The newer COSA firmwares have a simple - * flow-control - in the status word has bits 2 and 3 set to 1 means that the - * channel 0 or 1 doesn't want to receive data. - * - * It seems there is a bug in COSA firmware (need to trace it further): - * When the driver status says that the kernel has no more data for transmit - * (e.g. at the end of TX DMA) and then the kernel changes its mind - * (e.g. new packet is queued to hard_start_xmit()), the card issues - * the TX interrupt but does not mark the channel as ready-to-transmit. - * The fix seems to be to push the packet to COSA despite its request. - * We first try to obey the card's opinion, and then fall back to forced TX. - */ -static inline void tx_interrupt(struct cosa_data *cosa, int status) -{ - unsigned long flags, flags1; -#ifdef DEBUG_IRQS - pr_info("cosa%d: SR_DOWN_REQUEST status=0x%04x\n", cosa->num, status); -#endif - spin_lock_irqsave(&cosa->lock, flags); - set_bit(TXBIT, &cosa->rxtx); - if (!test_bit(IRQBIT, &cosa->rxtx)) { - /* flow control, see the comment above */ - int i = 0; - - if (!cosa->txbitmap) { - pr_warn("%s: No channel wants data in TX IRQ. Expect DMA timeout.\n", - cosa->name); - put_driver_status_nolock(cosa); - clear_bit(TXBIT, &cosa->rxtx); - spin_unlock_irqrestore(&cosa->lock, flags); - return; - } - while (1) { - cosa->txchan++; - i++; - if (cosa->txchan >= cosa->nchannels) - cosa->txchan = 0; - if (!(cosa->txbitmap & (1 << cosa->txchan))) - continue; - if (~status & - (1 << (cosa->txchan + DRIVER_TXMAP_SHIFT))) - break; - /* in second pass, accept first ready-to-TX channel */ - if (i > cosa->nchannels) { - /* Can be safely ignored */ -#ifdef DEBUG_IRQS - printk(KERN_DEBUG "%s: Forcing TX " - "to not-ready channel %d\n", - cosa->name, cosa->txchan); -#endif - break; - } - } - - cosa->txsize = cosa->chan[cosa->txchan].txsize; - if (cosa_dma_able(cosa->chan + cosa->txchan, - cosa->chan[cosa->txchan].txbuf, - cosa->txsize)) { - cosa->txbuf = cosa->chan[cosa->txchan].txbuf; - } else { - memcpy(cosa->bouncebuf, cosa->chan[cosa->txchan].txbuf, - cosa->txsize); - cosa->txbuf = cosa->bouncebuf; - } - } - - if (is_8bit(cosa)) { - if (!test_bit(IRQBIT, &cosa->rxtx)) { - cosa_putstatus(cosa, SR_TX_INT_ENA); - cosa_putdata8(cosa, ((cosa->txchan << 5) & 0xe0) | - ((cosa->txsize >> 8) & 0x1f)); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_TX_INT_ENA); - debug_data_out(cosa, ((cosa->txchan << 5) & 0xe0) | - ((cosa->txsize >> 8) & 0x1f)); - debug_data_in(cosa, cosa_getdata8(cosa)); -#else - cosa_getdata8(cosa); -#endif - set_bit(IRQBIT, &cosa->rxtx); - spin_unlock_irqrestore(&cosa->lock, flags); - return; - } else { - clear_bit(IRQBIT, &cosa->rxtx); - cosa_putstatus(cosa, 0); - cosa_putdata8(cosa, cosa->txsize & 0xff); -#ifdef DEBUG_IO - debug_status_out(cosa, 0); - debug_data_out(cosa, cosa->txsize & 0xff); -#endif - } - } else { - cosa_putstatus(cosa, SR_TX_INT_ENA); - cosa_putdata16(cosa, ((cosa->txchan << 13) & 0xe000) - | (cosa->txsize & 0x1fff)); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_TX_INT_ENA); - debug_data_out(cosa, ((cosa->txchan << 13) & 0xe000) | - (cosa->txsize & 0x1fff)); - debug_data_in(cosa, cosa_getdata8(cosa)); - debug_status_out(cosa, 0); -#else - cosa_getdata8(cosa); -#endif - cosa_putstatus(cosa, 0); - } - - if (cosa->busmaster) { - unsigned long addr = virt_to_bus(cosa->txbuf); - int count = 0; - - pr_info("busmaster IRQ\n"); - while (!(cosa_getstatus(cosa) & SR_TX_RDY)) { - count++; - udelay(10); - if (count > 1000) - break; - } - pr_info("status %x\n", cosa_getstatus(cosa)); - pr_info("ready after %d loops\n", count); - cosa_putdata16(cosa, (addr >> 16) & 0xffff); - - count = 0; - while (!(cosa_getstatus(cosa) & SR_TX_RDY)) { - count++; - if (count > 1000) - break; - udelay(10); - } - pr_info("ready after %d loops\n", count); - cosa_putdata16(cosa, addr & 0xffff); - flags1 = claim_dma_lock(); - set_dma_mode(cosa->dma, DMA_MODE_CASCADE); - enable_dma(cosa->dma); - release_dma_lock(flags1); - } else { - /* start the DMA */ - flags1 = claim_dma_lock(); - disable_dma(cosa->dma); - clear_dma_ff(cosa->dma); - set_dma_mode(cosa->dma, DMA_MODE_WRITE); - set_dma_addr(cosa->dma, virt_to_bus(cosa->txbuf)); - set_dma_count(cosa->dma, cosa->txsize); - enable_dma(cosa->dma); - release_dma_lock(flags1); - } - cosa_putstatus(cosa, SR_TX_DMA_ENA | SR_USR_INT_ENA); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_TX_DMA_ENA | SR_USR_INT_ENA); -#endif - spin_unlock_irqrestore(&cosa->lock, flags); -} - -static inline void rx_interrupt(struct cosa_data *cosa, int status) -{ - unsigned long flags; -#ifdef DEBUG_IRQS - pr_info("cosa%d: SR_UP_REQUEST\n", cosa->num); -#endif - - spin_lock_irqsave(&cosa->lock, flags); - set_bit(RXBIT, &cosa->rxtx); - - if (is_8bit(cosa)) { - if (!test_bit(IRQBIT, &cosa->rxtx)) { - set_bit(IRQBIT, &cosa->rxtx); - put_driver_status_nolock(cosa); - cosa->rxsize = cosa_getdata8(cosa) << 8; -#ifdef DEBUG_IO - debug_data_in(cosa, cosa->rxsize >> 8); -#endif - spin_unlock_irqrestore(&cosa->lock, flags); - return; - } else { - clear_bit(IRQBIT, &cosa->rxtx); - cosa->rxsize |= cosa_getdata8(cosa) & 0xff; -#ifdef DEBUG_IO - debug_data_in(cosa, cosa->rxsize & 0xff); -#endif -#if 0 - pr_info("cosa%d: receive rxsize = (0x%04x)\n", - cosa->num, cosa->rxsize); -#endif - } - } else { - cosa->rxsize = cosa_getdata16(cosa); -#ifdef DEBUG_IO - debug_data_in(cosa, cosa->rxsize); -#endif -#if 0 - pr_info("cosa%d: receive rxsize = (0x%04x)\n", - cosa->num, cosa->rxsize); -#endif - } - if (((cosa->rxsize & 0xe000) >> 13) >= cosa->nchannels) { - pr_warn("%s: rx for unknown channel (0x%04x)\n", - cosa->name, cosa->rxsize); - spin_unlock_irqrestore(&cosa->lock, flags); - goto reject; - } - cosa->rxchan = cosa->chan + ((cosa->rxsize & 0xe000) >> 13); - cosa->rxsize &= 0x1fff; - spin_unlock_irqrestore(&cosa->lock, flags); - - cosa->rxbuf = NULL; - if (cosa->rxchan->setup_rx) - cosa->rxbuf = cosa->rxchan->setup_rx(cosa->rxchan, cosa->rxsize); - - if (!cosa->rxbuf) { -reject: /* Reject the packet */ - pr_info("cosa%d: rejecting packet on channel %d\n", - cosa->num, cosa->rxchan->num); - cosa->rxbuf = cosa->bouncebuf; - } - - /* start the DMA */ - flags = claim_dma_lock(); - disable_dma(cosa->dma); - clear_dma_ff(cosa->dma); - set_dma_mode(cosa->dma, DMA_MODE_READ); - if (cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize & 0x1fff)) - set_dma_addr(cosa->dma, virt_to_bus(cosa->rxbuf)); - else - set_dma_addr(cosa->dma, virt_to_bus(cosa->bouncebuf)); - - set_dma_count(cosa->dma, (cosa->rxsize & 0x1fff)); - enable_dma(cosa->dma); - release_dma_lock(flags); - spin_lock_irqsave(&cosa->lock, flags); - cosa_putstatus(cosa, SR_RX_DMA_ENA | SR_USR_INT_ENA); - if (!is_8bit(cosa) && (status & SR_TX_RDY)) - cosa_putdata8(cosa, DRIVER_RX_READY); -#ifdef DEBUG_IO - debug_status_out(cosa, SR_RX_DMA_ENA | SR_USR_INT_ENA); - if (!is_8bit(cosa) && (status & SR_TX_RDY)) - debug_data_cmd(cosa, DRIVER_RX_READY); -#endif - spin_unlock_irqrestore(&cosa->lock, flags); -} - -static inline void eot_interrupt(struct cosa_data *cosa, int status) -{ - unsigned long flags, flags1; - - spin_lock_irqsave(&cosa->lock, flags); - flags1 = claim_dma_lock(); - disable_dma(cosa->dma); - clear_dma_ff(cosa->dma); - release_dma_lock(flags1); - if (test_bit(TXBIT, &cosa->rxtx)) { - struct channel_data *chan = cosa->chan + cosa->txchan; - - if (chan->tx_done) - if (chan->tx_done(chan, cosa->txsize)) - clear_bit(chan->num, &cosa->txbitmap); - } else if (test_bit(RXBIT, &cosa->rxtx)) { -#ifdef DEBUG_DATA - { - int i; - - pr_info("cosa%dc%d: done rx(0x%x)", - cosa->num, cosa->rxchan->num, cosa->rxsize); - for (i = 0; i < cosa->rxsize; i++) - pr_cont(" %02x", cosa->rxbuf[i]&0xff); - pr_cont("\n"); - } -#endif - /* Packet for unknown channel? */ - if (cosa->rxbuf == cosa->bouncebuf) - goto out; - if (!cosa_dma_able(cosa->rxchan, cosa->rxbuf, cosa->rxsize)) - memcpy(cosa->rxbuf, cosa->bouncebuf, cosa->rxsize); - if (cosa->rxchan->rx_done) - if (cosa->rxchan->rx_done(cosa->rxchan)) - clear_bit(cosa->rxchan->num, &cosa->rxbitmap); - } else { - pr_notice("cosa%d: unexpected EOT interrupt\n", cosa->num); - } - /* Clear the RXBIT, TXBIT and IRQBIT (the latest should be - * cleared anyway). We should do it as soon as possible - * so that we can tell the COSA we are done and to give it a time - * for recovery. - */ -out: - cosa->rxtx = 0; - put_driver_status_nolock(cosa); - spin_unlock_irqrestore(&cosa->lock, flags); -} - -static irqreturn_t cosa_interrupt(int irq, void *cosa_) -{ - unsigned status; - int count = 0; - struct cosa_data *cosa = cosa_; -again: - status = cosa_getstatus(cosa); -#ifdef DEBUG_IRQS - pr_info("cosa%d: got IRQ, status 0x%02x\n", cosa->num, status & 0xff); -#endif -#ifdef DEBUG_IO - debug_status_in(cosa, status); -#endif - switch (status & SR_CMD_FROM_SRP_MASK) { - case SR_DOWN_REQUEST: - tx_interrupt(cosa, status); - break; - case SR_UP_REQUEST: - rx_interrupt(cosa, status); - break; - case SR_END_OF_TRANSFER: - eot_interrupt(cosa, status); - break; - default: - /* We may be too fast for SRP. Try to wait a bit more. */ - if (count++ < 100) { - udelay(100); - goto again; - } - pr_info("cosa%d: unknown status 0x%02x in IRQ after %d retries\n", - cosa->num, status & 0xff, count); - } -#ifdef DEBUG_IRQS - if (count) - pr_info("%s: %d-times got unknown status in IRQ\n", - cosa->name, count); - else - pr_info("%s: returning from IRQ\n", cosa->name); -#endif - return IRQ_HANDLED; -} - -/* ---------- I/O debugging routines ---------- */ -/* These routines can be used to monitor COSA/SRP I/O and to printk() - * the data being transferred on the data and status I/O port in a - * readable way. - */ - -#ifdef DEBUG_IO -static void debug_status_in(struct cosa_data *cosa, int status) -{ - char *s; - - switch (status & SR_CMD_FROM_SRP_MASK) { - case SR_UP_REQUEST: - s = "RX_REQ"; - break; - case SR_DOWN_REQUEST: - s = "TX_REQ"; - break; - case SR_END_OF_TRANSFER: - s = "ET_REQ"; - break; - default: - s = "NO_REQ"; - break; - } - pr_info("%s: IO: status -> 0x%02x (%s%s%s%s)\n", - cosa->name, - status, - status & SR_USR_RQ ? "USR_RQ|" : "", - status & SR_TX_RDY ? "TX_RDY|" : "", - status & SR_RX_RDY ? "RX_RDY|" : "", - s); -} - -static void debug_status_out(struct cosa_data *cosa, int status) -{ - pr_info("%s: IO: status <- 0x%02x (%s%s%s%s%s%s)\n", - cosa->name, - status, - status & SR_RX_DMA_ENA ? "RXDMA|" : "!rxdma|", - status & SR_TX_DMA_ENA ? "TXDMA|" : "!txdma|", - status & SR_RST ? "RESET|" : "", - status & SR_USR_INT_ENA ? "USRINT|" : "!usrint|", - status & SR_TX_INT_ENA ? "TXINT|" : "!txint|", - status & SR_RX_INT_ENA ? "RXINT" : "!rxint"); -} - -static void debug_data_in(struct cosa_data *cosa, int data) -{ - pr_info("%s: IO: data -> 0x%04x\n", cosa->name, data); -} - -static void debug_data_out(struct cosa_data *cosa, int data) -{ - pr_info("%s: IO: data <- 0x%04x\n", cosa->name, data); -} - -static void debug_data_cmd(struct cosa_data *cosa, int data) -{ - pr_info("%s: IO: data <- 0x%04x (%s|%s)\n", - cosa->name, data, - data & SR_RDY_RCV ? "RX_RDY" : "!rx_rdy", - data & SR_RDY_SND ? "TX_RDY" : "!tx_rdy"); -} -#endif - -/* EOF -- this file has not been truncated */ diff --git a/drivers/net/wan/cosa.h b/drivers/net/wan/cosa.h deleted file mode 100644 index f57e0af9d56a..000000000000 --- a/drivers/net/wan/cosa.h +++ /dev/null @@ -1,104 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* $Id: cosa.h,v 1.6 1999/01/06 14:02:44 kas Exp $ */ - -/* - * Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@xxxxxxxxxx> - */ - -#ifndef COSA_H__ -#define COSA_H__ - -#include <linux/ioctl.h> - -#ifdef __KERNEL__ -/* status register - output bits */ -#define SR_RX_DMA_ENA 0x04 /* receiver DMA enable bit */ -#define SR_TX_DMA_ENA 0x08 /* transmitter DMA enable bit */ -#define SR_RST 0x10 /* SRP reset */ -#define SR_USR_INT_ENA 0x20 /* user interrupt enable bit */ -#define SR_TX_INT_ENA 0x40 /* transmitter interrupt enable bit */ -#define SR_RX_INT_ENA 0x80 /* receiver interrupt enable bit */ - -/* status register - input bits */ -#define SR_USR_RQ 0x20 /* user interrupt request pending */ -#define SR_TX_RDY 0x40 /* transmitter empty (ready) */ -#define SR_RX_RDY 0x80 /* receiver data ready */ - -#define SR_UP_REQUEST 0x02 /* request from SRP to transfer data - up to PC */ -#define SR_DOWN_REQUEST 0x01 /* SRP is able to transfer data down - from PC to SRP */ -#define SR_END_OF_TRANSFER 0x03 /* SRP signalize end of - transfer (up or down) */ - -#define SR_CMD_FROM_SRP_MASK 0x03 /* mask to get SRP command */ - -/* bits in driver status byte definitions : */ -#define SR_RDY_RCV 0x01 /* ready to receive packet */ -#define SR_RDY_SND 0x02 /* ready to send packet */ -#define SR_CMD_PND 0x04 /* command pending */ /* not currently used */ - -/* ???? */ -#define SR_PKT_UP 0x01 /* transfer of packet up in progress */ -#define SR_PKT_DOWN 0x02 /* transfer of packet down in progress */ - -#endif /* __KERNEL__ */ - -#define SR_LOAD_ADDR 0x4400 /* SRP microcode load address */ -#define SR_START_ADDR 0x4400 /* SRP microcode start address */ - -#define COSA_LOAD_ADDR 0x400 /* SRP microcode load address */ -#define COSA_MAX_FIRMWARE_SIZE 0x10000 - -/* ioctls */ -struct cosa_download { - int addr, len; - char __user *code; -}; - -/* Reset the device */ -#define COSAIORSET _IO('C',0xf0) - -/* Start microcode at given address */ -#define COSAIOSTRT _IOW('C',0xf1, int) - -/* Read the block from the device memory */ -#define COSAIORMEM _IOWR('C',0xf2, struct cosa_download *) - /* actually the struct cosa_download itself; this is to keep - * the ioctl number same as in 2.4 in order to keep the user-space - * utils compatible. */ - -/* Write the block to the device memory (i.e. download the microcode) */ -#define COSAIODOWNLD _IOW('C',0xf2, struct cosa_download *) - /* actually the struct cosa_download itself; this is to keep - * the ioctl number same as in 2.4 in order to keep the user-space - * utils compatible. */ - -/* Read the device type (one of "srp", "cosa", and "cosa8" for now) */ -#define COSAIORTYPE _IOR('C',0xf3, char *) - -/* Read the device identification string */ -#define COSAIORIDSTR _IOR('C',0xf4, char *) -/* Maximum length of the identification string. */ -#define COSA_MAX_ID_STRING 128 - -/* Increment/decrement the module usage count :-) */ -/* #define COSAIOMINC _IO('C',0xf5) */ -/* #define COSAIOMDEC _IO('C',0xf6) */ - -/* Get the total number of cards installed */ -#define COSAIONRCARDS _IO('C',0xf7) - -/* Get the number of channels on this card */ -#define COSAIONRCHANS _IO('C',0xf8) - -/* Set the driver for the bus-master operations */ -#define COSAIOBMSET _IOW('C', 0xf9, unsigned short) - -#define COSA_BM_OFF 0 /* Bus-mastering off - use ISA DMA (default) */ -#define COSA_BM_ON 1 /* Bus-mastering on - faster but untested */ - -/* Gets the busmaster status */ -#define COSAIOBMGET _IO('C', 0xfa) - -#endif /* !COSA_H__ */ -- 2.34.1
