On Fri, May 11, 2007 at 09:17:22AM -0500, James Bottomley wrote:
> This is an arm driver ... you need to cc Russell.
NAK. I have a patch which restores this driver to a working state
(and removes all the PC IO-isms from the driver.) It'll be sometime
during the /next/ merge window until I merge it though.
> On Thu, 2007-05-10 at 23:00 -0700, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> > From: Adrian Bunk <bunk@xxxxxxxxx>
> >
> > Drivers that had been marked as BROKEN for such a long time seem to be
> > unlikely to be revived in the forseeable future.
> >
> > But if anyone wants to ever revive this driver, the code is still
> > present in the older kernel releases.
> >
> > Signed-off-by: Adrian Bunk <bunk@xxxxxxxxx>
> > Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> > ---
> >
> > drivers/scsi/arm/Kconfig | 29
> > drivers/scsi/arm/Makefile | 3
> > drivers/scsi/arm/acornscsi-io.S | 145 -
> > drivers/scsi/arm/acornscsi.c | 3130 ------------------------------
> > drivers/scsi/arm/acornscsi.h | 358 ---
> > 5 files changed, 3665 deletions(-)
> >
> > diff -puN drivers/scsi/arm/Kconfig~remove-the-broken-scsi_acornscsi_3-driver drivers/scsi/arm/Kconfig
> > --- a/drivers/scsi/arm/Kconfig~remove-the-broken-scsi_acornscsi_3-driver
> > +++ a/drivers/scsi/arm/Kconfig
> > @@ -1,35 +1,6 @@
> > #
> > # SCSI driver configuration for Acorn
> > #
> > -config SCSI_ACORNSCSI_3
> > - tristate "Acorn SCSI card (aka30) support"
> > - depends on ARCH_ACORN && SCSI && BROKEN
> > - select SCSI_SPI_ATTRS
> > - help
> > - This enables support for the Acorn SCSI card (aka30). If you have an
> > - Acorn system with one of these, say Y. If unsure, say N.
> > -
> > -config SCSI_ACORNSCSI_TAGGED_QUEUE
> > - bool "Support SCSI 2 Tagged queueing"
> > - depends on SCSI_ACORNSCSI_3
> > - help
> > - Say Y here to enable tagged queuing support on the Acorn SCSI card.
> > -
> > - This is a feature of SCSI-2 which improves performance: the host
> > - adapter can send several SCSI commands to a device's queue even if
> > - previous commands haven't finished yet. Some SCSI devices don't
> > - implement this properly, so the safe answer is N.
> > -
> > -config SCSI_ACORNSCSI_SYNC
> > - bool "Support SCSI 2 Synchronous Transfers"
> > - depends on SCSI_ACORNSCSI_3
> > - help
> > - Say Y here to enable synchronous transfer negotiation with all
> > - targets on the Acorn SCSI card.
> > -
> > - In general, this improves performance; however some SCSI devices
> > - don't implement it properly, so the safe answer is N.
> > -
> > config SCSI_ARXESCSI
> > tristate "ARXE SCSI support"
> > depends on ARCH_ACORN && SCSI
> > diff -puN drivers/scsi/arm/Makefile~remove-the-broken-scsi_acornscsi_3-driver drivers/scsi/arm/Makefile
> > --- a/drivers/scsi/arm/Makefile~remove-the-broken-scsi_acornscsi_3-driver
> > +++ a/drivers/scsi/arm/Makefile
> > @@ -2,9 +2,6 @@
> > # Makefile for drivers/scsi/arm
> > #
> >
> > -acornscsi_mod-objs := acornscsi.o acornscsi-io.o
> > -
> > -obj-$(CONFIG_SCSI_ACORNSCSI_3) += acornscsi_mod.o queue.o msgqueue.o
> > obj-$(CONFIG_SCSI_ARXESCSI) += arxescsi.o fas216.o queue.o msgqueue.o
> > obj-$(CONFIG_SCSI_CUMANA_1) += cumana_1.o
> > obj-$(CONFIG_SCSI_CUMANA_2) += cumana_2.o fas216.o queue.o msgqueue.o
> > diff -puN drivers/scsi/arm/acornscsi-io.S~remove-the-broken-scsi_acornscsi_3-driver /dev/null
> > --- a/drivers/scsi/arm/acornscsi-io.S
> > +++ /dev/null
> > @@ -1,145 +0,0 @@
> > -/*
> > - * linux/drivers/acorn/scsi/acornscsi-io.S: Acorn SCSI card IO
> > - *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - */
> > -#include <linux/linkage.h>
> > -
> > -#include <asm/assembler.h>
> > -#include <asm/hardware.h>
> > -
> > -#if (IO_BASE == (PCIO_BASE & 0xff000000))
> > -#define ADDR(off,reg) \
> > - tst off, $0x80000000 ;\
> > - mov reg, $IO_BASE ;\
> > - orreq reg, reg, $(PCIO_BASE & 0x00ff0000)
> > -#else
> > -#define ADDR(off,reg) \
> > - tst off, $0x80000000 ;\
> > - movne reg, $IO_BASE ;\
> > - moveq reg, $(PCIO_BASE & 0xff000000) ;\
> > - orreq reg, reg, $(PCIO_BASE & 0x00ff0000)
> > -#endif
> > -
> > -@ Purpose: transfer a block of data from the acorn scsi card to memory
> > -@ Proto : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
> > -@ Returns: nothing
> > -
> > - .align
> > -ENTRY(__acornscsi_in)
> > - stmfd sp!, {r4 - r7, lr}
> > - bic r0, r0, #3
> > - mov lr, #0xff
> > - orr lr, lr, #0xff00
> > -acornscsi_in16lp:
> > - subs r2, r2, #16
> > - bmi acornscsi_in8
> > - ldmia r0!, {r3, r4, r5, r6}
> > - and r3, r3, lr
> > - orr r3, r3, r4, lsl #16
> > - and r4, r5, lr
> > - orr r4, r4, r6, lsl #16
> > - ldmia r0!, {r5, r6, r7, ip}
> > - and r5, r5, lr
> > - orr r5, r5, r6, lsl #16
> > - and r6, r7, lr
> > - orr r6, r6, ip, lsl #16
> > - stmia r1!, {r3 - r6}
> > - bne acornscsi_in16lp
> > - LOADREGS(fd, sp!, {r4 - r7, pc})
> > -
> > -acornscsi_in8: adds r2, r2, #8
> > - bmi acornscsi_in4
> > - ldmia r0!, {r3, r4, r5, r6}
> > - and r3, r3, lr
> > - orr r3, r3, r4, lsl #16
> > - and r4, r5, lr
> > - orr r4, r4, r6, lsl #16
> > - stmia r1!, {r3 - r4}
> > - LOADREGS(eqfd, sp!, {r4 - r7, pc})
> > - sub r2, r2, #8
> > -
> > -acornscsi_in4: adds r2, r2, #4
> > - bmi acornscsi_in2
> > - ldmia r0!, {r3, r4}
> > - and r3, r3, lr
> > - orr r3, r3, r4, lsl #16
> > - str r3, [r1], #4
> > - LOADREGS(eqfd, sp!, {r4 - r7, pc})
> > - sub r2, r2, #4
> > -
> > -acornscsi_in2: adds r2, r2, #2
> > - ldr r3, [r0], #4
> > - and r3, r3, lr
> > - strb r3, [r1], #1
> > - mov r3, r3, lsr #8
> > - strplb r3, [r1], #1
> > - LOADREGS(fd, sp!, {r4 - r7, pc})
> > -
> > -@ Purpose: transfer a block of data from memory to the acorn scsi card
> > -@ Proto : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
> > -@ Returns: nothing
> > -
> > -ENTRY(__acornscsi_out)
> > - stmfd sp!, {r4 - r6, lr}
> > - bic r0, r0, #3
> > -acornscsi_out16lp:
> > - subs r2, r2, #16
> > - bmi acornscsi_out8
> > - ldmia r1!, {r4, r6, ip, lr}
> > - mov r3, r4, lsl #16
> > - orr r3, r3, r3, lsr #16
> > - mov r4, r4, lsr #16
> > - orr r4, r4, r4, lsl #16
> > - mov r5, r6, lsl #16
> > - orr r5, r5, r5, lsr #16
> > - mov r6, r6, lsr #16
> > - orr r6, r6, r6, lsl #16
> > - stmia r0!, {r3, r4, r5, r6}
> > - mov r3, ip, lsl #16
> > - orr r3, r3, r3, lsr #16
> > - mov r4, ip, lsr #16
> > - orr r4, r4, r4, lsl #16
> > - mov ip, lr, lsl #16
> > - orr ip, ip, ip, lsr #16
> > - mov lr, lr, lsr #16
> > - orr lr, lr, lr, lsl #16
> > - stmia r0!, {r3, r4, ip, lr}
> > - bne acornscsi_out16lp
> > - LOADREGS(fd, sp!, {r4 - r6, pc})
> > -
> > -acornscsi_out8: adds r2, r2, #8
> > - bmi acornscsi_out4
> > - ldmia r1!, {r4, r6}
> > - mov r3, r4, lsl #16
> > - orr r3, r3, r3, lsr #16
> > - mov r4, r4, lsr #16
> > - orr r4, r4, r4, lsl #16
> > - mov r5, r6, lsl #16
> > - orr r5, r5, r5, lsr #16
> > - mov r6, r6, lsr #16
> > - orr r6, r6, r6, lsl #16
> > - stmia r0!, {r3, r4, r5, r6}
> > - LOADREGS(eqfd, sp!, {r4 - r6, pc})
> > -
> > - sub r2, r2, #8
> > -acornscsi_out4: adds r2, r2, #4
> > - bmi acornscsi_out2
> > - ldr r4, [r1], #4
> > - mov r3, r4, lsl #16
> > - orr r3, r3, r3, lsr #16
> > - mov r4, r4, lsr #16
> > - orr r4, r4, r4, lsl #16
> > - stmia r0!, {r3, r4}
> > - LOADREGS(eqfd, sp!, {r4 - r6, pc})
> > -
> > - sub r2, r2, #4
> > -acornscsi_out2: adds r2, r2, #2
> > - ldr r3, [r1], #2
> > - strb r3, [r0], #1
> > - mov r3, r3, lsr #8
> > - strplb r3, [r0], #1
> > - LOADREGS(fd, sp!, {r4 - r6, pc})
> > -
> > diff -puN drivers/scsi/arm/acornscsi.c~remove-the-broken-scsi_acornscsi_3-driver /dev/null
> > --- a/drivers/scsi/arm/acornscsi.c
> > +++ /dev/null
> > @@ -1,3130 +0,0 @@
> > -/*
> > - * linux/drivers/acorn/scsi/acornscsi.c
> > - *
> > - * Acorn SCSI 3 driver
> > - * By R.M.King.
> > - *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - *
> > - * Abandoned using the Select and Transfer command since there were
> > - * some nasty races between our software and the target devices that
> > - * were not easy to solve, and the device errata had a lot of entries
> > - * for this command, some of them quite nasty...
> > - *
> > - * Changelog:
> > - * 26-Sep-1997 RMK Re-jigged to use the queue module.
> > - * Re-coded state machine to be based on driver
> > - * state not scsi state. Should be easier to debug.
> > - * Added acornscsi_release to clean up properly.
> > - * Updated proc/scsi reporting.
> > - * 05-Oct-1997 RMK Implemented writing to SCSI devices.
> > - * 06-Oct-1997 RMK Corrected small (non-serious) bug with the connect/
> > - * reconnect race condition causing a warning message.
> > - * 12-Oct-1997 RMK Added catch for re-entering interrupt routine.
> > - * 15-Oct-1997 RMK Improved handling of commands.
> > - * 27-Jun-1998 RMK Changed asm/delay.h to linux/delay.h.
> > - * 13-Dec-1998 RMK Better abort code and command handling. Extra state
> > - * transitions added to allow dodgy devices to work.
> > - */
> > -#define DEBUG_NO_WRITE 1
> > -#define DEBUG_QUEUES 2
> > -#define DEBUG_DMA 4
> > -#define DEBUG_ABORT 8
> > -#define DEBUG_DISCON 16
> > -#define DEBUG_CONNECT 32
> > -#define DEBUG_PHASES 64
> > -#define DEBUG_WRITE 128
> > -#define DEBUG_LINK 256
> > -#define DEBUG_MESSAGES 512
> > -#define DEBUG_RESET 1024
> > -#define DEBUG_ALL (DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\
> > - DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\
> > - DEBUG_DMA|DEBUG_QUEUES)
> > -
> > -/* DRIVER CONFIGURATION
> > - *
> > - * SCSI-II Tagged queue support.
> > - *
> > - * I don't have any SCSI devices that support it, so it is totally untested
> > - * (except to make sure that it doesn't interfere with any non-tagging
> > - * devices). It is not fully implemented either - what happens when a
> > - * tagging device reconnects???
> > - *
> > - * You can tell if you have a device that supports tagged queueing my
> > - * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported
> > - * as '2 TAG'.
> > - *
> > - * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config
> > - * scripts, but disabled here. Once debugged, remove the #undef, otherwise to debug,
> > - * comment out the undef.
> > - */
> > -#undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > -/*
> > - * SCSI-II Linked command support.
> > - *
> > - * The higher level code doesn't support linked commands yet, and so the option
> > - * is undef'd here.
> > - */
> > -#undef CONFIG_SCSI_ACORNSCSI_LINK
> > -/*
> > - * SCSI-II Synchronous transfer support.
> > - *
> > - * Tried and tested...
> > - *
> > - * SDTR_SIZE - maximum number of un-acknowledged bytes (0 = off, 12 = max)
> > - * SDTR_PERIOD - period of REQ signal (min=125, max=1020)
> > - * DEFAULT_PERIOD - default REQ period.
> > - */
> > -#define SDTR_SIZE 12
> > -#define SDTR_PERIOD 125
> > -#define DEFAULT_PERIOD 500
> > -
> > -/*
> > - * Debugging information
> > - *
> > - * DEBUG - bit mask from list above
> > - * DEBUG_TARGET - is defined to the target number if you want to debug
> > - * a specific target. [only recon/write/dma].
> > - */
> > -#define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE)
> > -/* only allow writing to SCSI device 0 */
> > -#define NO_WRITE 0xFE
> > -/*#define DEBUG_TARGET 2*/
> > -/*
> > - * Select timeout time (in 10ms units)
> > - *
> > - * This is the timeout used between the start of selection and the WD33C93
> > - * chip deciding that the device isn't responding.
> > - */
> > -#define TIMEOUT_TIME 10
> > -/*
> > - * Define this if you want to have verbose explaination of SCSI
> > - * status/messages.
> > - */
> > -#undef CONFIG_ACORNSCSI_CONSTANTS
> > -/*
> > - * Define this if you want to use the on board DMAC [don't remove this option]
> > - * If not set, then use PIO mode (not currently supported).
> > - */
> > -#define USE_DMAC
> > -
> > -/*
> > - * ====================================================================================
> > - */
> > -
> > -#ifdef DEBUG_TARGET
> > -#define DBG(cmd,xxx...) \
> > - if (cmd->device->id == DEBUG_TARGET) { \
> > - xxx; \
> > - }
> > -#else
> > -#define DBG(cmd,xxx...) xxx
> > -#endif
> > -
> > -#ifndef STRINGIFY
> > -#define STRINGIFY(x) #x
> > -#endif
> > -#define STRx(x) STRINGIFY(x)
> > -#define NO_WRITE_STR STRx(NO_WRITE)
> > -
> > -#include <linux/module.h>
> > -#include <linux/kernel.h>
> > -#include <linux/string.h>
> > -#include <linux/signal.h>
> > -#include <linux/errno.h>
> > -#include <linux/proc_fs.h>
> > -#include <linux/ioport.h>
> > -#include <linux/blkdev.h>
> > -#include <linux/delay.h>
> > -#include <linux/interrupt.h>
> > -#include <linux/init.h>
> > -#include <linux/bitops.h>
> > -
> > -#include <asm/system.h>
> > -#include <asm/io.h>
> > -#include <asm/ecard.h>
> > -
> > -#include "../scsi.h"
> > -#include <scsi/scsi_dbg.h>
> > -#include <scsi/scsi_host.h>
> > -#include <scsi/scsi_transport_spi.h>
> > -#include "acornscsi.h"
> > -#include "msgqueue.h"
> > -#include "scsi.h"
> > -
> > -#include <scsi/scsicam.h>
> > -
> > -#define VER_MAJOR 2
> > -#define VER_MINOR 0
> > -#define VER_PATCH 6
> > -
> > -#ifndef ABORT_TAG
> > -#define ABORT_TAG 0xd
> > -#else
> > -#error "Yippee! ABORT TAG is now defined! Remove this error!"
> > -#endif
> > -
> > -#ifdef CONFIG_SCSI_ACORNSCSI_LINK
> > -#error SCSI2 LINKed commands not supported (yet)!
> > -#endif
> > -
> > -#ifdef USE_DMAC
> > -/*
> > - * DMAC setup parameters
> > - */
> > -#define INIT_DEVCON0 (DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP)
> > -#define INIT_DEVCON1 (DEVCON1_BHLD)
> > -#define DMAC_READ (MODECON_READ)
> > -#define DMAC_WRITE (MODECON_WRITE)
> > -#define INIT_SBICDMA (CTRL_DMABURST)
> > -
> > -#define scsi_xferred have_data_in
> > -
> > -/*
> > - * Size of on-board DMA buffer
> > - */
> > -#define DMAC_BUFFER_SIZE 65536
> > -#endif
> > -
> > -#define STATUS_BUFFER_TO_PRINT 24
> > -
> > -unsigned int sdtr_period = SDTR_PERIOD;
> > -unsigned int sdtr_size = SDTR_SIZE;
> > -
> > -static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
> > - unsigned int result);
> > -static int acornscsi_reconnect_finish(AS_Host *host);
> > -static void acornscsi_dma_cleanup(AS_Host *host);
> > -static void acornscsi_abortcmd(AS_Host *host, unsigned char tag);
> > -
> > -/* ====================================================================================
> > - * Miscellaneous
> > - */
> > -
> > -static inline void
> > -sbic_arm_write(unsigned int io_port, int reg, int value)
> > -{
> > - __raw_writeb(reg, io_port);
> > - __raw_writeb(value, io_port + 4);
> > -}
> > -
> > -#define sbic_arm_writenext(io,val) \
> > - __raw_writeb((val), (io) + 4)
> > -
> > -static inline
> > -int sbic_arm_read(unsigned int io_port, int reg)
> > -{
> > - if(reg == SBIC_ASR)
> > - return __raw_readl(io_port) & 255;
> > - __raw_writeb(reg, io_port);
> > - return __raw_readl(io_port + 4) & 255;
> > -}
> > -
> > -#define sbic_arm_readnext(io) \
> > - __raw_readb((io) + 4)
> > -
> > -#ifdef USE_DMAC
> > -#define dmac_read(io_port,reg) \
> > - inb((io_port) + (reg))
> > -
> > -#define dmac_write(io_port,reg,value) \
> > - ({ outb((value), (io_port) + (reg)); })
> > -
> > -#define dmac_clearintr(io_port) \
> > - ({ outb(0, (io_port)); })
> > -
> > -static inline
> > -unsigned int dmac_address(unsigned int io_port)
> > -{
> > - return dmac_read(io_port, DMAC_TXADRHI) << 16 |
> > - dmac_read(io_port, DMAC_TXADRMD) << 8 |
> > - dmac_read(io_port, DMAC_TXADRLO);
> > -}
> > -
> > -static
> > -void acornscsi_dumpdma(AS_Host *host, char *where)
> > -{
> > - unsigned int mode, addr, len;
> > -
> > - mode = dmac_read(host->dma.io_port, DMAC_MODECON);
> > - addr = dmac_address(host->dma.io_port);
> > - len = dmac_read(host->dma.io_port, DMAC_TXCNTHI) << 8 |
> > - dmac_read(host->dma.io_port, DMAC_TXCNTLO);
> > -
> > - printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ",
> > - host->host->host_no, where,
> > - mode, addr, (len + 1) & 0xffff,
> > - dmac_read(host->dma.io_port, DMAC_MASKREG));
> > -
> > - printk("DMA @%06x, ", host->dma.start_addr);
> > - printk("BH @%p +%04x, ", host->scsi.SCp.ptr,
> > - host->scsi.SCp.this_residual);
> > - printk("DT @+%04x ST @+%04x", host->dma.transferred,
> > - host->scsi.SCp.scsi_xferred);
> > - printk("\n");
> > -}
> > -#endif
> > -
> > -static
> > -unsigned long acornscsi_sbic_xfcount(AS_Host *host)
> > -{
> > - unsigned long length;
> > -
> > - length = sbic_arm_read(host->scsi.io_port, SBIC_TRANSCNTH) << 16;
> > - length |= sbic_arm_readnext(host->scsi.io_port) << 8;
> > - length |= sbic_arm_readnext(host->scsi.io_port);
> > -
> > - return length;
> > -}
> > -
> > -static int
> > -acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg)
> > -{
> > - int asr;
> > -
> > - do {
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > -
> > - if ((asr & stat_mask) == stat)
> > - return 0;
> > -
> > - udelay(1);
> > - } while (--timeout);
> > -
> > - printk("scsi%d: timeout while %s\n", host->host->host_no, msg);
> > -
> > - return -1;
> > -}
> > -
> > -static
> > -int acornscsi_sbic_issuecmd(AS_Host *host, int command)
> > -{
> > - if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command"))
> > - return -1;
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, command);
> > -
> > - return 0;
> > -}
> > -
> > -static void
> > -acornscsi_csdelay(unsigned int cs)
> > -{
> > - unsigned long target_jiffies, flags;
> > -
> > - target_jiffies = jiffies + 1 + cs * HZ / 100;
> > -
> > - local_save_flags(flags);
> > - local_irq_enable();
> > -
> > - while (time_before(jiffies, target_jiffies)) barrier();
> > -
> > - local_irq_restore(flags);
> > -}
> > -
> > -static
> > -void acornscsi_resetcard(AS_Host *host)
> > -{
> > - unsigned int i, timeout;
> > -
> > - /* assert reset line */
> > - host->card.page_reg = 0x80;
> > - outb(host->card.page_reg, host->card.io_page);
> > -
> > - /* wait 3 cs. SCSI standard says 25ms. */
> > - acornscsi_csdelay(3);
> > -
> > - host->card.page_reg = 0;
> > - outb(host->card.page_reg, host->card.io_page);
> > -
> > - /*
> > - * Should get a reset from the card
> > - */
> > - timeout = 1000;
> > - do {
> > - if (inb(host->card.io_intr) & 8)
> > - break;
> > - udelay(1);
> > - } while (--timeout);
> > -
> > - if (timeout == 0)
> > - printk("scsi%d: timeout while resetting card\n",
> > - host->host->host_no);
> > -
> > - sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > -
> > - /* setup sbic - WD33C93A */
> > - sbic_arm_write(host->scsi.io_port, SBIC_OWNID, OWNID_EAF | host->host->this_id);
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_RESET);
> > -
> > - /*
> > - * Command should cause a reset interrupt
> > - */
> > - timeout = 1000;
> > - do {
> > - if (inb(host->card.io_intr) & 8)
> > - break;
> > - udelay(1);
> > - } while (--timeout);
> > -
> > - if (timeout == 0)
> > - printk("scsi%d: timeout while resetting card\n",
> > - host->host->host_no);
> > -
> > - sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - if (sbic_arm_read(host->scsi.io_port, SBIC_SSR) != 0x01)
> > - printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n",
> > - host->host->host_no);
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
> > - sbic_arm_write(host->scsi.io_port, SBIC_TIMEOUT, TIMEOUT_TIME);
> > - sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
> > - sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
> > -
> > - host->card.page_reg = 0x40;
> > - outb(host->card.page_reg, host->card.io_page);
> > -
> > - /* setup dmac - uPC71071 */
> > - dmac_write(host->dma.io_port, DMAC_INIT, 0);
> > -#ifdef USE_DMAC
> > - dmac_write(host->dma.io_port, DMAC_INIT, INIT_8BIT);
> > - dmac_write(host->dma.io_port, DMAC_CHANNEL, CHANNEL_0);
> > - dmac_write(host->dma.io_port, DMAC_DEVCON0, INIT_DEVCON0);
> > - dmac_write(host->dma.io_port, DMAC_DEVCON1, INIT_DEVCON1);
> > -#endif
> > -
> > - host->SCpnt = NULL;
> > - host->scsi.phase = PHASE_IDLE;
> > - host->scsi.disconnectable = 0;
> > -
> > - memset(host->busyluns, 0, sizeof(host->busyluns));
> > -
> > - for (i = 0; i < 8; i++) {
> > - host->device[i].sync_state = SYNC_NEGOCIATE;
> > - host->device[i].disconnect_ok = 1;
> > - }
> > -
> > - /* wait 25 cs. SCSI standard says 250ms. */
> > - acornscsi_csdelay(25);
> > -}
> > -
> > -/*=============================================================================================
> > - * Utility routines (eg. debug)
> > - */
> > -#ifdef CONFIG_ACORNSCSI_CONSTANTS
> > -static char *acornscsi_interrupttype[] = {
> > - "rst", "suc", "p/a", "3",
> > - "term", "5", "6", "7",
> > - "serv", "9", "a", "b",
> > - "c", "d", "e", "f"
> > -};
> > -
> > -static signed char acornscsi_map[] = {
> > - 0, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, 2, -1, -1, -1, -1, 3, -1, 4, 5, 6, 7, 8, 9, 10, 11,
> > - 12, 13, 14, -1, -1, -1, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - 15, 16, 17, 18, 19, -1, -1, 20, 4, 5, 6, 7, 8, 9, 10, 11,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - 21, 22, -1, -1, -1, 23, -1, -1, 4, 5, 6, 7, 8, 9, 10, 11,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
> > - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
> > -};
> > -
> > -static char *acornscsi_interruptcode[] = {
> > - /* 0 */
> > - "reset - normal mode", /* 00 */
> > - "reset - advanced mode", /* 01 */
> > -
> > - /* 2 */
> > - "sel", /* 11 */
> > - "sel+xfer", /* 16 */
> > - "data-out", /* 18 */
> > - "data-in", /* 19 */
> > - "cmd", /* 1A */
> > - "stat", /* 1B */
> > - "??-out", /* 1C */
> > - "??-in", /* 1D */
> > - "msg-out", /* 1E */
> > - "msg-in", /* 1F */
> > -
> > - /* 12 */
> > - "/ACK asserted", /* 20 */
> > - "save-data-ptr", /* 21 */
> > - "{re}sel", /* 22 */
> > -
> > - /* 15 */
> > - "inv cmd", /* 40 */
> > - "unexpected disconnect", /* 41 */
> > - "sel timeout", /* 42 */
> > - "P err", /* 43 */
> > - "P err+ATN", /* 44 */
> > - "bad status byte", /* 47 */
> > -
> > - /* 21 */
> > - "resel, no id", /* 80 */
> > - "resel", /* 81 */
> > - "discon", /* 85 */
> > -};
> > -
> > -static
> > -void print_scsi_status(unsigned int ssr)
> > -{
> > - if (acornscsi_map[ssr] != -1)
> > - printk("%s:%s",
> > - acornscsi_interrupttype[(ssr >> 4)],
> > - acornscsi_interruptcode[acornscsi_map[ssr]]);
> > - else
> > - printk("%X:%X", ssr >> 4, ssr & 0x0f);
> > -}
> > -#endif
> > -
> > -static
> > -void print_sbic_status(int asr, int ssr, int cmdphase)
> > -{
> > -#ifdef CONFIG_ACORNSCSI_CONSTANTS
> > - printk("sbic: %c%c%c%c%c%c ",
> > - asr & ASR_INT ? 'I' : 'i',
> > - asr & ASR_LCI ? 'L' : 'l',
> > - asr & ASR_BSY ? 'B' : 'b',
> > - asr & ASR_CIP ? 'C' : 'c',
> > - asr & ASR_PE ? 'P' : 'p',
> > - asr & ASR_DBR ? 'D' : 'd');
> > - printk("scsi: ");
> > - print_scsi_status(ssr);
> > - printk(" ph %02X\n", cmdphase);
> > -#else
> > - printk("sbic: %02X scsi: %X:%X ph: %02X\n",
> > - asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase);
> > -#endif
> > -}
> > -
> > -static void
> > -acornscsi_dumplogline(AS_Host *host, int target, int line)
> > -{
> > - unsigned long prev;
> > - signed int ptr;
> > -
> > - ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT;
> > - if (ptr < 0)
> > - ptr += STATUS_BUFFER_SIZE;
> > -
> > - printk("%c: %3s:", target == 8 ? 'H' : '0' + target,
> > - line == 0 ? "ph" : line == 1 ? "ssr" : "int");
> > -
> > - prev = host->status[target][ptr].when;
> > -
> > - for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
> > - unsigned long time_diff;
> > -
> > - if (!host->status[target][ptr].when)
> > - continue;
> > -
> > - switch (line) {
> > - case 0:
> > - printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ',
> > - host->status[target][ptr].ph);
> > - break;
> > -
> > - case 1:
> > - printk(" %02X", host->status[target][ptr].ssr);
> > - break;
> > -
> > - case 2:
> > - time_diff = host->status[target][ptr].when - prev;
> > - prev = host->status[target][ptr].when;
> > - if (time_diff == 0)
> > - printk("==^");
> > - else if (time_diff >= 100)
> > - printk(" ");
> > - else
> > - printk(" %02ld", time_diff);
> > - break;
> > - }
> > - }
> > -
> > - printk("\n");
> > -}
> > -
> > -static
> > -void acornscsi_dumplog(AS_Host *host, int target)
> > -{
> > - do {
> > - acornscsi_dumplogline(host, target, 0);
> > - acornscsi_dumplogline(host, target, 1);
> > - acornscsi_dumplogline(host, target, 2);
> > -
> > - if (target == 8)
> > - break;
> > -
> > - target = 8;
> > - } while (1);
> > -}
> > -
> > -static
> > -char acornscsi_target(AS_Host *host)
> > -{
> > - if (host->SCpnt)
> > - return '0' + host->SCpnt->device->id;
> > - return 'H';
> > -}
> > -
> > -/*
> > - * Prototype: cmdtype_t acornscsi_cmdtype(int command)
> > - * Purpose : differentiate READ from WRITE from other commands
> > - * Params : command - command to interpret
> > - * Returns : CMD_READ - command reads data,
> > - * CMD_WRITE - command writes data,
> > - * CMD_MISC - everything else
> > - */
> > -static inline
> > -cmdtype_t acornscsi_cmdtype(int command)
> > -{
> > - switch (command) {
> > - case WRITE_6: case WRITE_10: case WRITE_12:
> > - return CMD_WRITE;
> > - case READ_6: case READ_10: case READ_12:
> > - return CMD_READ;
> > - default:
> > - return CMD_MISC;
> > - }
> > -}
> > -
> > -/*
> > - * Prototype: int acornscsi_datadirection(int command)
> > - * Purpose : differentiate between commands that have a DATA IN phase
> > - * and a DATA OUT phase
> > - * Params : command - command to interpret
> > - * Returns : DATADIR_OUT - data out phase expected
> > - * DATADIR_IN - data in phase expected
> > - */
> > -static
> > -datadir_t acornscsi_datadirection(int command)
> > -{
> > - switch (command) {
> > - case CHANGE_DEFINITION: case COMPARE: case COPY:
> > - case COPY_VERIFY: case LOG_SELECT: case MODE_SELECT:
> > - case MODE_SELECT_10: case SEND_DIAGNOSTIC: case WRITE_BUFFER:
> > - case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE:
> > - case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW:
> > - case WRITE_6: case WRITE_10: case WRITE_VERIFY:
> > - case UPDATE_BLOCK: case WRITE_LONG: case WRITE_SAME:
> > - case SEARCH_HIGH_12: case SEARCH_EQUAL_12: case SEARCH_LOW_12:
> > - case WRITE_12: case WRITE_VERIFY_12: case SET_WINDOW:
> > - case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea:
> > - return DATADIR_OUT;
> > - default:
> > - return DATADIR_IN;
> > - }
> > -}
> > -
> > -/*
> > - * Purpose : provide values for synchronous transfers with 33C93.
> > - * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
> > - * Modified by Russell King for 8MHz WD33C93A
> > - */
> > -static struct sync_xfer_tbl {
> > - unsigned int period_ns;
> > - unsigned char reg_value;
> > -} sync_xfer_table[] = {
> > - { 1, 0x20 }, { 249, 0x20 }, { 374, 0x30 },
> > - { 499, 0x40 }, { 624, 0x50 }, { 749, 0x60 },
> > - { 874, 0x70 }, { 999, 0x00 }, { 0, 0 }
> > -};
> > -
> > -/*
> > - * Prototype: int acornscsi_getperiod(unsigned char syncxfer)
> > - * Purpose : period for the synchronous transfer setting
> > - * Params : syncxfer SYNCXFER register value
> > - * Returns : period in ns.
> > - */
> > -static
> > -int acornscsi_getperiod(unsigned char syncxfer)
> > -{
> > - int i;
> > -
> > - syncxfer &= 0xf0;
> > - if (syncxfer == 0x10)
> > - syncxfer = 0;
> > -
> > - for (i = 1; sync_xfer_table[i].period_ns; i++)
> > - if (syncxfer == sync_xfer_table[i].reg_value)
> > - return sync_xfer_table[i].period_ns;
> > - return 0;
> > -}
> > -
> > -/*
> > - * Prototype: int round_period(unsigned int period)
> > - * Purpose : return index into above table for a required REQ period
> > - * Params : period - time (ns) for REQ
> > - * Returns : table index
> > - * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
> > - */
> > -static inline
> > -int round_period(unsigned int period)
> > -{
> > - int i;
> > -
> > - for (i = 1; sync_xfer_table[i].period_ns; i++) {
> > - if ((period <= sync_xfer_table[i].period_ns) &&
> > - (period > sync_xfer_table[i - 1].period_ns))
> > - return i;
> > - }
> > - return 7;
> > -}
> > -
> > -/*
> > - * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
> > - * Purpose : calculate value for 33c93s SYNC register
> > - * Params : period - time (ns) for REQ
> > - * offset - offset in bytes between REQ/ACK
> > - * Returns : value for SYNC register
> > - * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
> > - */
> > -static
> > -unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
> > -{
> > - return sync_xfer_table[round_period(period)].reg_value |
> > - ((offset < SDTR_SIZE) ? offset : SDTR_SIZE);
> > -}
> > -
> > -/* ====================================================================================
> > - * Command functions
> > - */
> > -/*
> > - * Function: acornscsi_kick(AS_Host *host)
> > - * Purpose : kick next command to interface
> > - * Params : host - host to send command to
> > - * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING
> > - * Notes : interrupts are always disabled!
> > - */
> > -static
> > -intr_ret_t acornscsi_kick(AS_Host *host)
> > -{
> > - int from_queue = 0;
> > - struct scsi_cmnd *SCpnt;
> > -
> > - /* first check to see if a command is waiting to be executed */
> > - SCpnt = host->origSCpnt;
> > - host->origSCpnt = NULL;
> > -
> > - /* retrieve next command */
> > - if (!SCpnt) {
> > - SCpnt = queue_remove_exclude(&host->queues.issue, host->busyluns);
> > - if (!SCpnt)
> > - return INTR_IDLE;
> > -
> > - from_queue = 1;
> > - }
> > -
> > - if (host->scsi.disconnectable && host->SCpnt) {
> > - queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
> > - host->scsi.disconnectable = 0;
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - DBG(host->SCpnt, printk("scsi%d.%c: moved command to disconnected queue\n",
> > - host->host->host_no, acornscsi_target(host)));
> > -#endif
> > - host->SCpnt = NULL;
> > - }
> > -
> > - /*
> > - * If we have an interrupt pending, then we may have been reselected.
> > - * In this case, we don't want to write to the registers
> > - */
> > - if (!(sbic_arm_read(host->scsi.io_port, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) {
> > - sbic_arm_write(host->scsi.io_port, SBIC_DESTID, SCpnt->device->id);
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_SELWITHATN);
> > - }
> > -
> > - /*
> > - * claim host busy - all of these must happen atomically wrt
> > - * our interrupt routine. Failure means command loss.
> > - */
> > - host->scsi.phase = PHASE_CONNECTING;
> > - host->SCpnt = SCpnt;
> > - host->scsi.SCp = SCpnt->SCp;
> > - host->dma.xfer_setup = 0;
> > - host->dma.xfer_required = 0;
> > - host->dma.xfer_done = 0;
> > -
> > -#if (DEBUG & (DEBUG_ABORT|DEBUG_CONNECT))
> > - DBG(SCpnt,printk("scsi%d.%c: starting cmd %02X\n",
> > - host->host->host_no, '0' + SCpnt->device->id,
> > - SCpnt->cmnd[0]));
> > -#endif
> > -
> > - if (from_queue) {
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - /*
> > - * tagged queueing - allocate a new tag to this command
> > - */
> > - if (SCpnt->device->simple_tags) {
> > - SCpnt->device->current_tag += 1;
> > - if (SCpnt->device->current_tag == 0)
> > - SCpnt->device->current_tag = 1;
> > - SCpnt->tag = SCpnt->device->current_tag;
> > - } else
> > -#endif
> > - set_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns);
> > -
> > - host->stats.removes += 1;
> > -
> > - switch (acornscsi_cmdtype(SCpnt->cmnd[0])) {
> > - case CMD_WRITE:
> > - host->stats.writes += 1;
> > - break;
> > - case CMD_READ:
> > - host->stats.reads += 1;
> > - break;
> > - case CMD_MISC:
> > - host->stats.miscs += 1;
> > - break;
> > - }
> > - }
> > -
> > - return INTR_PROCESSING;
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp, unsigned int result)
> > - * Purpose : complete processing for command
> > - * Params : host - interface that completed
> > - * result - driver byte of result
> > - */
> > -static void acornscsi_done(AS_Host *host, struct scsi_cmnd **SCpntp,
> > - unsigned int result)
> > -{
> > - struct scsi_cmnd *SCpnt = *SCpntp;
> > -
> > - /* clean up */
> > - sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
> > -
> > - host->stats.fins += 1;
> > -
> > - if (SCpnt) {
> > - *SCpntp = NULL;
> > -
> > - acornscsi_dma_cleanup(host);
> > -
> > - SCpnt->result = result << 16 | host->scsi.SCp.Message << 8 | host->scsi.SCp.Status;
> > -
> > - /*
> > - * In theory, this should not happen. In practice, it seems to.
> > - * Only trigger an error if the device attempts to report all happy
> > - * but with untransferred buffers... If we don't do something, then
> > - * data loss will occur. Should we check SCpnt->underflow here?
> > - * It doesn't appear to be set to something meaningful by the higher
> > - * levels all the time.
> > - */
> > - if (result == DID_OK) {
> > - int xfer_warn = 0;
> > -
> > - if (SCpnt->underflow == 0) {
> > - if (host->scsi.SCp.ptr &&
> > - acornscsi_cmdtype(SCpnt->cmnd[0]) != CMD_MISC)
> > - xfer_warn = 1;
> > - } else {
> > - if (host->scsi.SCp.scsi_xferred < SCpnt->underflow ||
> > - host->scsi.SCp.scsi_xferred != host->dma.transferred)
> > - xfer_warn = 1;
> > - }
> > -
> > - /* ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.6)
> > - * Targets which break data transfers into multiple
> > - * connections shall end each successful connection
> > - * (except possibly the last) with a SAVE DATA
> > - * POINTER - DISCONNECT message sequence.
> > - *
> > - * This makes it difficult to ensure that a transfer has
> > - * completed. If we reach the end of a transfer during
> > - * the command, then we can only have finished the transfer.
> > - * therefore, if we seem to have some data remaining, this
> > - * is not a problem.
> > - */
> > - if (host->dma.xfer_done)
> > - xfer_warn = 0;
> > -
> > - if (xfer_warn) {
> > - switch (status_byte(SCpnt->result)) {
> > - case CHECK_CONDITION:
> > - case COMMAND_TERMINATED:
> > - case BUSY:
> > - case QUEUE_FULL:
> > - case RESERVATION_CONFLICT:
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.H: incomplete data transfer detected: result=%08X command=",
> > - host->host->host_no, SCpnt->result);
> > - __scsi_print_command(SCpnt->cmnd);
> > - acornscsi_dumpdma(host, "done");
> > - acornscsi_dumplog(host, SCpnt->device->id);
> > - SCpnt->result &= 0xffff;
> > - SCpnt->result |= DID_ERROR << 16;
> > - }
> > - }
> > - }
> > -
> > - if (!SCpnt->scsi_done)
> > - panic("scsi%d.H: null scsi_done function in acornscsi_done", host->host->host_no);
> > -
> > - clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns);
> > -
> > - SCpnt->scsi_done(SCpnt);
> > - } else
> > - printk("scsi%d: null command in acornscsi_done", host->host->host_no);
> > -
> > - host->scsi.phase = PHASE_IDLE;
> > -}
> > -
> > -/* ====================================================================================
> > - * DMA routines
> > - */
> > -/*
> > - * Purpose : update SCSI Data Pointer
> > - * Notes : this will only be one SG entry or less
> > - */
> > -static
> > -void acornscsi_data_updateptr(AS_Host *host, struct scsi_pointer *SCp, unsigned int length)
> > -{
> > - SCp->ptr += length;
> > - SCp->this_residual -= length;
> > -
> > - if (SCp->this_residual == 0 && next_SCp(SCp) == 0)
> > - host->dma.xfer_done = 1;
> > -}
> > -
> > -/*
> > - * Prototype: void acornscsi_data_read(AS_Host *host, char *ptr,
> > - * unsigned int start_addr, unsigned int length)
> > - * Purpose : read data from DMA RAM
> > - * Params : host - host to transfer from
> > - * ptr - DRAM address
> > - * start_addr - host mem address
> > - * length - number of bytes to transfer
> > - * Notes : this will only be one SG entry or less
> > - */
> > -static
> > -void acornscsi_data_read(AS_Host *host, char *ptr,
> > - unsigned int start_addr, unsigned int length)
> > -{
> > - extern void __acornscsi_in(int port, char *buf, int len);
> > - unsigned int page, offset, len = length;
> > -
> > - page = (start_addr >> 12);
> > - offset = start_addr & ((1 << 12) - 1);
> > -
> > - outb((page & 0x3f) | host->card.page_reg, host->card.io_page);
> > -
> > - while (len > 0) {
> > - unsigned int this_len;
> > -
> > - if (len + offset > (1 << 12))
> > - this_len = (1 << 12) - offset;
> > - else
> > - this_len = len;
> > -
> > - __acornscsi_in(host->card.io_ram + (offset << 1), ptr, this_len);
> > -
> > - offset += this_len;
> > - ptr += this_len;
> > - len -= this_len;
> > -
> > - if (offset == (1 << 12)) {
> > - offset = 0;
> > - page ++;
> > - outb((page & 0x3f) | host->card.page_reg, host->card.io_page);
> > - }
> > - }
> > - outb(host->card.page_reg, host->card.io_page);
> > -}
> > -
> > -/*
> > - * Prototype: void acornscsi_data_write(AS_Host *host, char *ptr,
> > - * unsigned int start_addr, unsigned int length)
> > - * Purpose : write data to DMA RAM
> > - * Params : host - host to transfer from
> > - * ptr - DRAM address
> > - * start_addr - host mem address
> > - * length - number of bytes to transfer
> > - * Notes : this will only be one SG entry or less
> > - */
> > -static
> > -void acornscsi_data_write(AS_Host *host, char *ptr,
> > - unsigned int start_addr, unsigned int length)
> > -{
> > - extern void __acornscsi_out(int port, char *buf, int len);
> > - unsigned int page, offset, len = length;
> > -
> > - page = (start_addr >> 12);
> > - offset = start_addr & ((1 << 12) - 1);
> > -
> > - outb((page & 0x3f) | host->card.page_reg, host->card.io_page);
> > -
> > - while (len > 0) {
> > - unsigned int this_len;
> > -
> > - if (len + offset > (1 << 12))
> > - this_len = (1 << 12) - offset;
> > - else
> > - this_len = len;
> > -
> > - __acornscsi_out(host->card.io_ram + (offset << 1), ptr, this_len);
> > -
> > - offset += this_len;
> > - ptr += this_len;
> > - len -= this_len;
> > -
> > - if (offset == (1 << 12)) {
> > - offset = 0;
> > - page ++;
> > - outb((page & 0x3f) | host->card.page_reg, host->card.io_page);
> > - }
> > - }
> > - outb(host->card.page_reg, host->card.io_page);
> > -}
> > -
> > -/* =========================================================================================
> > - * On-board DMA routines
> > - */
> > -#ifdef USE_DMAC
> > -/*
> > - * Prototype: void acornscsi_dmastop(AS_Host *host)
> > - * Purpose : stop all DMA
> > - * Params : host - host on which to stop DMA
> > - * Notes : This is called when leaving DATA IN/OUT phase,
> > - * or when interface is RESET
> > - */
> > -static inline
> > -void acornscsi_dma_stop(AS_Host *host)
> > -{
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON);
> > - dmac_clearintr(host->dma.io_intr_clear);
> > -
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "stop"));
> > -#endif
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
> > - * Purpose : setup DMA controller for data transfer
> > - * Params : host - host to setup
> > - * direction - data transfer direction
> > - * Notes : This is called when entering DATA I/O phase, not
> > - * while we're in a DATA I/O phase
> > - */
> > -static
> > -void acornscsi_dma_setup(AS_Host *host, dmadir_t direction)
> > -{
> > - unsigned int address, length, mode;
> > -
> > - host->dma.direction = direction;
> > -
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON);
> > -
> > - if (direction == DMA_OUT) {
> > -#if (DEBUG & DEBUG_NO_WRITE)
> > - if (NO_WRITE & (1 << host->SCpnt->device->id)) {
> > - printk(KERN_CRIT "scsi%d.%c: I can't handle DMA_OUT!\n",
> > - host->host->host_no, acornscsi_target(host));
> > - return;
> > - }
> > -#endif
> > - mode = DMAC_WRITE;
> > - } else
> > - mode = DMAC_READ;
> > -
> > - /*
> > - * Allocate some buffer space, limited to half the buffer size
> > - */
> > - length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
> > - if (length) {
> > - host->dma.start_addr = address = host->dma.free_addr;
> > - host->dma.free_addr = (host->dma.free_addr + length) &
> > - (DMAC_BUFFER_SIZE - 1);
> > -
> > - /*
> > - * Transfer data to DMA memory
> > - */
> > - if (direction == DMA_OUT)
> > - acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
> > - length);
> > -
> > - length -= 1;
> > - dmac_write(host->dma.io_port, DMAC_TXCNTLO, length);
> > - dmac_write(host->dma.io_port, DMAC_TXCNTHI, length >> 8);
> > - dmac_write(host->dma.io_port, DMAC_TXADRLO, address);
> > - dmac_write(host->dma.io_port, DMAC_TXADRMD, address >> 8);
> > - dmac_write(host->dma.io_port, DMAC_TXADRHI, 0);
> > - dmac_write(host->dma.io_port, DMAC_MODECON, mode);
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF);
> > -
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "strt"));
> > -#endif
> > - host->dma.xfer_setup = 1;
> > - }
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_dma_cleanup(AS_Host *host)
> > - * Purpose : ensure that all DMA transfers are up-to-date & host->scsi.SCp is correct
> > - * Params : host - host to finish
> > - * Notes : This is called when a command is:
> > - * terminating, RESTORE_POINTERS, SAVE_POINTERS, DISCONECT
> > - * : This must not return until all transfers are completed.
> > - */
> > -static
> > -void acornscsi_dma_cleanup(AS_Host *host)
> > -{
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON);
> > - dmac_clearintr(host->dma.io_intr_clear);
> > -
> > - /*
> > - * Check for a pending transfer
> > - */
> > - if (host->dma.xfer_required) {
> > - host->dma.xfer_required = 0;
> > - if (host->dma.direction == DMA_IN)
> > - acornscsi_data_read(host, host->dma.xfer_ptr,
> > - host->dma.xfer_start, host->dma.xfer_length);
> > - }
> > -
> > - /*
> > - * Has a transfer been setup?
> > - */
> > - if (host->dma.xfer_setup) {
> > - unsigned int transferred;
> > -
> > - host->dma.xfer_setup = 0;
> > -
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "cupi"));
> > -#endif
> > -
> > - /*
> > - * Calculate number of bytes transferred from DMA.
> > - */
> > - transferred = dmac_address(host->dma.io_port) - host->dma.start_addr;
> > - host->dma.transferred += transferred;
> > -
> > - if (host->dma.direction == DMA_IN)
> > - acornscsi_data_read(host, host->scsi.SCp.ptr,
> > - host->dma.start_addr, transferred);
> > -
> > - /*
> > - * Update SCSI pointers
> > - */
> > - acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "cupo"));
> > -#endif
> > - }
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_dmacintr(AS_Host *host)
> > - * Purpose : handle interrupts from DMAC device
> > - * Params : host - host to process
> > - * Notes : If reading, we schedule the read to main memory &
> > - * allow the transfer to continue.
> > - * : If writing, we fill the onboard DMA memory from main
> > - * memory.
> > - * : Called whenever DMAC finished it's current transfer.
> > - */
> > -static
> > -void acornscsi_dma_intr(AS_Host *host)
> > -{
> > - unsigned int address, length, transferred;
> > -
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "inti"));
> > -#endif
> > -
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_ON);
> > - dmac_clearintr(host->dma.io_intr_clear);
> > -
> > - /*
> > - * Calculate amount transferred via DMA
> > - */
> > - transferred = dmac_address(host->dma.io_port) - host->dma.start_addr;
> > - host->dma.transferred += transferred;
> > -
> > - /*
> > - * Schedule DMA transfer off board
> > - */
> > - if (host->dma.direction == DMA_IN) {
> > - host->dma.xfer_start = host->dma.start_addr;
> > - host->dma.xfer_length = transferred;
> > - host->dma.xfer_ptr = host->scsi.SCp.ptr;
> > - host->dma.xfer_required = 1;
> > - }
> > -
> > - acornscsi_data_updateptr(host, &host->scsi.SCp, transferred);
> > -
> > - /*
> > - * Allocate some buffer space, limited to half the on-board RAM size
> > - */
> > - length = min_t(unsigned int, host->scsi.SCp.this_residual, DMAC_BUFFER_SIZE / 2);
> > - if (length) {
> > - host->dma.start_addr = address = host->dma.free_addr;
> > - host->dma.free_addr = (host->dma.free_addr + length) &
> > - (DMAC_BUFFER_SIZE - 1);
> > -
> > - /*
> > - * Transfer data to DMA memory
> > - */
> > - if (host->dma.direction == DMA_OUT)
> > - acornscsi_data_write(host, host->scsi.SCp.ptr, host->dma.start_addr,
> > - length);
> > -
> > - length -= 1;
> > - dmac_write(host->dma.io_port, DMAC_TXCNTLO, length);
> > - dmac_write(host->dma.io_port, DMAC_TXCNTHI, length >> 8);
> > - dmac_write(host->dma.io_port, DMAC_TXADRLO, address);
> > - dmac_write(host->dma.io_port, DMAC_TXADRMD, address >> 8);
> > - dmac_write(host->dma.io_port, DMAC_TXADRHI, 0);
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF);
> > -
> > -#if (DEBUG & DEBUG_DMA)
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "into"));
> > -#endif
> > - } else {
> > - host->dma.xfer_setup = 0;
> > -#if 0
> > - /*
> > - * If the interface still wants more, then this is an error.
> > - * We give it another byte, but we also attempt to raise an
> > - * attention condition. We continue giving one byte until
> > - * the device recognises the attention.
> > - */
> > - if (dmac_read(host->dma.io_port, DMAC_STATUS) & STATUS_RQ0) {
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > -
> > - dmac_write(host->dma.io_port, DMAC_TXCNTLO, 0);
> > - dmac_write(host->dma.io_port, DMAC_TXCNTHI, 0);
> > - dmac_write(host->dma.io_port, DMAC_TXADRLO, 0);
> > - dmac_write(host->dma.io_port, DMAC_TXADRMD, 0);
> > - dmac_write(host->dma.io_port, DMAC_TXADRHI, 0);
> > - dmac_write(host->dma.io_port, DMAC_MASKREG, MASK_OFF);
> > - }
> > -#endif
> > - }
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_dma_xfer(AS_Host *host)
> > - * Purpose : transfer data between AcornSCSI and memory
> > - * Params : host - host to process
> > - */
> > -static
> > -void acornscsi_dma_xfer(AS_Host *host)
> > -{
> > - host->dma.xfer_required = 0;
> > -
> > - if (host->dma.direction == DMA_IN)
> > - acornscsi_data_read(host, host->dma.xfer_ptr,
> > - host->dma.xfer_start, host->dma.xfer_length);
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_dma_adjust(AS_Host *host)
> > - * Purpose : adjust DMA pointers & count for bytes transferred to
> > - * SBIC but not SCSI bus.
> > - * Params : host - host to adjust DMA count for
> > - */
> > -static
> > -void acornscsi_dma_adjust(AS_Host *host)
> > -{
> > - if (host->dma.xfer_setup) {
> > - signed long transferred;
> > -#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "adji"));
> > -#endif
> > - /*
> > - * Calculate correct DMA address - DMA is ahead of SCSI bus while
> > - * writing.
> > - * host->scsi.SCp.scsi_xferred is the number of bytes
> > - * actually transferred to/from the SCSI bus.
> > - * host->dma.transferred is the number of bytes transferred
> > - * over DMA since host->dma.start_addr was last set.
> > - *
> > - * real_dma_addr = host->dma.start_addr + host->scsi.SCp.scsi_xferred
> > - * - host->dma.transferred
> > - */
> > - transferred = host->scsi.SCp.scsi_xferred - host->dma.transferred;
> > - if (transferred < 0)
> > - printk("scsi%d.%c: Ack! DMA write correction %ld < 0!\n",
> > - host->host->host_no, acornscsi_target(host), transferred);
> > - else if (transferred == 0)
> > - host->dma.xfer_setup = 0;
> > - else {
> > - transferred += host->dma.start_addr;
> > - dmac_write(host->dma.io_port, DMAC_TXADRLO, transferred);
> > - dmac_write(host->dma.io_port, DMAC_TXADRMD, transferred >> 8);
> > - dmac_write(host->dma.io_port, DMAC_TXADRHI, transferred >> 16);
> > -#if (DEBUG & (DEBUG_DMA|DEBUG_WRITE))
> > - DBG(host->SCpnt, acornscsi_dumpdma(host, "adjo"));
> > -#endif
> > - }
> > - }
> > -}
> > -#endif
> > -
> > -/* =========================================================================================
> > - * Data I/O
> > - */
> > -static int
> > -acornscsi_write_pio(AS_Host *host, char *bytes, int *ptr, int len, unsigned int max_timeout)
> > -{
> > - unsigned int asr, timeout = max_timeout;
> > - int my_ptr = *ptr;
> > -
> > - while (my_ptr < len) {
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > -
> > - if (asr & ASR_DBR) {
> > - timeout = max_timeout;
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_DATA, bytes[my_ptr++]);
> > - } else if (asr & ASR_INT)
> > - break;
> > - else if (--timeout == 0)
> > - break;
> > - udelay(1);
> > - }
> > -
> > - *ptr = my_ptr;
> > -
> > - return (timeout == 0) ? -1 : 0;
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_sendcommand(AS_Host *host)
> > - * Purpose : send a command to a target
> > - * Params : host - host which is connected to target
> > - */
> > -static void
> > -acornscsi_sendcommand(AS_Host *host)
> > -{
> > - struct scsi_cmnd *SCpnt = host->SCpnt;
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_TRANSCNTH, 0);
> > - sbic_arm_writenext(host->scsi.io_port, 0);
> > - sbic_arm_writenext(host->scsi.io_port, SCpnt->cmd_len - host->scsi.SCp.sent_command);
> > -
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
> > -
> > - if (acornscsi_write_pio(host, SCpnt->cmnd,
> > - (int *)&host->scsi.SCp.sent_command, SCpnt->cmd_len, 1000000))
> > - printk("scsi%d: timeout while sending command\n", host->host->host_no);
> > -
> > - host->scsi.phase = PHASE_COMMAND;
> > -}
> > -
> > -static
> > -void acornscsi_sendmessage(AS_Host *host)
> > -{
> > - unsigned int message_length = msgqueue_msglength(&host->scsi.msgs);
> > - unsigned int msgnr;
> > - struct message *msg;
> > -
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - printk("scsi%d.%c: sending message ",
> > - host->host->host_no, acornscsi_target(host));
> > -#endif
> > -
> > - switch (message_length) {
> > - case 0:
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
> > -
> > - acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 1");
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_DATA, NOP);
> > -
> > - host->scsi.last_message = NOP;
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - printk("NOP");
> > -#endif
> > - break;
> > -
> > - case 1:
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
> > - msg = msgqueue_getmsg(&host->scsi.msgs, 0);
> > -
> > - acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "sending message 2");
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_DATA, msg->msg[0]);
> > -
> > - host->scsi.last_message = msg->msg[0];
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - spi_print_msg(msg->msg);
> > -#endif
> > - break;
> > -
> > - default:
> > - /*
> > - * ANSI standard says: (SCSI-2 Rev 10c Sect 5.6.14)
> > - * 'When a target sends this (MESSAGE_REJECT) message, it
> > - * shall change to MESSAGE IN phase and send this message
> > - * prior to requesting additional message bytes from the
> > - * initiator. This provides an interlock so that the
> > - * initiator can determine which message byte is rejected.
> > - */
> > - sbic_arm_write(host->scsi.io_port, SBIC_TRANSCNTH, 0);
> > - sbic_arm_writenext(host->scsi.io_port, 0);
> > - sbic_arm_writenext(host->scsi.io_port, message_length);
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
> > -
> > - msgnr = 0;
> > - while ((msg = msgqueue_getmsg(&host->scsi.msgs, msgnr++)) != NULL) {
> > - unsigned int i;
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - spi_print_msg(msg);
> > -#endif
> > - i = 0;
> > - if (acornscsi_write_pio(host, msg->msg, &i, msg->length, 1000000))
> > - printk("scsi%d: timeout while sending message\n", host->host->host_no);
> > -
> > - host->scsi.last_message = msg->msg[0];
> > - if (msg->msg[0] == EXTENDED_MESSAGE)
> > - host->scsi.last_message |= msg->msg[2] << 8;
> > -
> > - if (i != msg->length)
> > - break;
> > - }
> > - break;
> > - }
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - printk("\n");
> > -#endif
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_readstatusbyte(AS_Host *host)
> > - * Purpose : Read status byte from connected target
> > - * Params : host - host connected to target
> > - */
> > -static
> > -void acornscsi_readstatusbyte(AS_Host *host)
> > -{
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO|CMND_SBT);
> > - acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "reading status byte");
> > - host->scsi.SCp.Status = sbic_arm_read(host->scsi.io_port, SBIC_DATA);
> > -}
> > -
> > -/*
> > - * Function: unsigned char acornscsi_readmessagebyte(AS_Host *host)
> > - * Purpose : Read one message byte from connected target
> > - * Params : host - host connected to target
> > - */
> > -static
> > -unsigned char acornscsi_readmessagebyte(AS_Host *host)
> > -{
> > - unsigned char message;
> > -
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO | CMND_SBT);
> > -
> > - acornscsi_sbic_wait(host, ASR_DBR, ASR_DBR, 1000, "for message byte");
> > -
> > - message = sbic_arm_read(host->scsi.io_port, SBIC_DATA);
> > -
> > - /* wait for MSGIN-XFER-PAUSED */
> > - acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after message byte");
> > -
> > - sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > -
> > - return message;
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_message(AS_Host *host)
> > - * Purpose : Read complete message from connected target & action message
> > - * Params : host - host connected to target
> > - */
> > -static
> > -void acornscsi_message(AS_Host *host)
> > -{
> > - unsigned char message[16];
> > - unsigned int msgidx = 0, msglen = 1;
> > -
> > - do {
> > - message[msgidx] = acornscsi_readmessagebyte(host);
> > -
> > - switch (msgidx) {
> > - case 0:
> > - if (message[0] == EXTENDED_MESSAGE ||
> > - (message[0] >= 0x20 && message[0] <= 0x2f))
> > - msglen = 2;
> > - break;
> > -
> > - case 1:
> > - if (message[0] == EXTENDED_MESSAGE)
> > - msglen += message[msgidx];
> > - break;
> > - }
> > - msgidx += 1;
> > - if (msgidx < msglen) {
> > - acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
> > -
> > - /* wait for next msg-in */
> > - acornscsi_sbic_wait(host, ASR_INT, ASR_INT, 1000, "for interrupt after negate ack");
> > - sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > - }
> > - } while (msgidx < msglen);
> > -
> > -#if (DEBUG & DEBUG_MESSAGES)
> > - printk("scsi%d.%c: message in: ",
> > - host->host->host_no, acornscsi_target(host));
> > - spi_print_msg(message);
> > - printk("\n");
> > -#endif
> > -
> > - if (host->scsi.phase == PHASE_RECONNECTED) {
> > - /*
> > - * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17)
> > - * 'Whenever a target reconnects to an initiator to continue
> > - * a tagged I/O process, the SIMPLE QUEUE TAG message shall
> > - * be sent immediately following the IDENTIFY message...'
> > - */
> > - if (message[0] == SIMPLE_QUEUE_TAG)
> > - host->scsi.reconnected.tag = message[1];
> > - if (acornscsi_reconnect_finish(host))
> > - host->scsi.phase = PHASE_MSGIN;
> > - }
> > -
> > - switch (message[0]) {
> > - case ABORT:
> > - case ABORT_TAG:
> > - case COMMAND_COMPLETE:
> > - if (host->scsi.phase != PHASE_STATUSIN) {
> > - printk(KERN_ERR "scsi%d.%c: command complete following non-status in phase?\n",
> > - host->host->host_no, acornscsi_target(host));
> > - acornscsi_dumplog(host, host->SCpnt->device->id);
> > - }
> > - host->scsi.phase = PHASE_DONE;
> > - host->scsi.SCp.Message = message[0];
> > - break;
> > -
> > - case SAVE_POINTERS:
> > - /*
> > - * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.20)
> > - * 'The SAVE DATA POINTER message is sent from a target to
> > - * direct the initiator to copy the active data pointer to
> > - * the saved data pointer for the current I/O process.
> > - */
> > - acornscsi_dma_cleanup(host);
> > - host->SCpnt->SCp = host->scsi.SCp;
> > - host->SCpnt->SCp.sent_command = 0;
> > - host->scsi.phase = PHASE_MSGIN;
> > - break;
> > -
> > - case RESTORE_POINTERS:
> > - /*
> > - * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.19)
> > - * 'The RESTORE POINTERS message is sent from a target to
> > - * direct the initiator to copy the most recently saved
> > - * command, data, and status pointers for the I/O process
> > - * to the corresponding active pointers. The command and
> > - * status pointers shall be restored to the beginning of
> > - * the present command and status areas.'
> > - */
> > - acornscsi_dma_cleanup(host);
> > - host->scsi.SCp = host->SCpnt->SCp;
> > - host->scsi.phase = PHASE_MSGIN;
> > - break;
> > -
> > - case DISCONNECT:
> > - /*
> > - * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 6.4.2)
> > - * 'On those occasions when an error or exception condition occurs
> > - * and the target elects to repeat the information transfer, the
> > - * target may repeat the transfer either issuing a RESTORE POINTERS
> > - * message or by disconnecting without issuing a SAVE POINTERS
> > - * message. When reconnection is completed, the most recent
> > - * saved pointer values are restored.'
> > - */
> > - acornscsi_dma_cleanup(host);
> > - host->scsi.phase = PHASE_DISCONNECT;
> > - break;
> > -
> > - case MESSAGE_REJECT:
> > -#if 0 /* this isn't needed any more */
> > - /*
> > - * If we were negociating sync transfer, we don't yet know if
> > - * this REJECT is for the sync transfer or for the tagged queue/wide
> > - * transfer. Re-initiate sync transfer negociation now, and if
> > - * we got a REJECT in response to SDTR, then it'll be set to DONE.
> > - */
> > - if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST)
> > - host->device[host->SCpnt->device->id].sync_state = SYNC_NEGOCIATE;
> > -#endif
> > -
> > - /*
> > - * If we have any messages waiting to go out, then assert ATN now
> > - */
> > - if (msgqueue_msglength(&host->scsi.msgs))
> > - acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
> > -
> > - switch (host->scsi.last_message) {
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - case HEAD_OF_QUEUE_TAG:
> > - case ORDERED_QUEUE_TAG:
> > - case SIMPLE_QUEUE_TAG:
> > - /*
> > - * ANSI standard says: (Section SCSI-2 Rev. 10c Sect 5.6.17)
> > - * If a target does not implement tagged queuing and a queue tag
> > - * message is received, it shall respond with a MESSAGE REJECT
> > - * message and accept the I/O process as if it were untagged.
> > - */
> > - printk(KERN_NOTICE "scsi%d.%c: disabling tagged queueing\n",
> > - host->host->host_no, acornscsi_target(host));
> > - host->SCpnt->device->simple_tags = 0;
> > - set_bit(host->SCpnt->device->id * 8 + host->SCpnt->device->lun, host->busyluns);
> > - break;
> > -#endif
> > - case EXTENDED_MESSAGE | (EXTENDED_SDTR << 8):
> > - /*
> > - * Target can't handle synchronous transfers
> > - */
> > - printk(KERN_NOTICE "scsi%d.%c: Using asynchronous transfer\n",
> > - host->host->host_no, acornscsi_target(host));
> > - host->device[host->SCpnt->device->id].sync_xfer = SYNCHTRANSFER_2DBA;
> > - host->device[host->SCpnt->device->id].sync_state = SYNC_ASYNCHRONOUS;
> > - sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
> > - break;
> > -
> > - default:
> > - break;
> > - }
> > - break;
> > -
> > - case QUEUE_FULL:
> > - /* TODO: target queue is full */
> > - break;
> > -
> > - case SIMPLE_QUEUE_TAG:
> > - /* tag queue reconnect... message[1] = queue tag. Print something to indicate something happened! */
> > - printk("scsi%d.%c: reconnect queue tag %02X\n",
> > - host->host->host_no, acornscsi_target(host),
> > - message[1]);
> > - break;
> > -
> > - case EXTENDED_MESSAGE:
> > - switch (message[2]) {
> > -#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
> > - case EXTENDED_SDTR:
> > - if (host->device[host->SCpnt->device->id].sync_state == SYNC_SENT_REQUEST) {
> > - /*
> > - * We requested synchronous transfers. This isn't quite right...
> > - * We can only say if this succeeded if we proceed on to execute the
> > - * command from this message. If we get a MESSAGE PARITY ERROR,
> > - * and the target retries fail, then we fallback to asynchronous mode
> > - */
> > - host->device[host->SCpnt->device->id].sync_state = SYNC_COMPLETED;
> > - printk(KERN_NOTICE "scsi%d.%c: Using synchronous transfer, offset %d, %d ns\n",
> > - host->host->host_no, acornscsi_target(host),
> > - message[4], message[3] * 4);
> > - host->device[host->SCpnt->device->id].sync_xfer =
> > - calc_sync_xfer(message[3] * 4, message[4]);
> > - } else {
> > - unsigned char period, length;
> > - /*
> > - * Target requested synchronous transfers. The agreement is only
> > - * to be in operation AFTER the target leaves message out phase.
> > - */
> > - acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
> > - period = max_t(unsigned int, message[3], sdtr_period / 4);
> > - length = min_t(unsigned int, message[4], sdtr_size);
> > - msgqueue_addmsg(&host->scsi.msgs, 5, EXTENDED_MESSAGE, 3,
> > - EXTENDED_SDTR, period, length);
> > - host->device[host->SCpnt->device->id].sync_xfer =
> > - calc_sync_xfer(period * 4, length);
> > - }
> > - sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
> > - break;
> > -#else
> > - /* We do not accept synchronous transfers. Respond with a
> > - * MESSAGE_REJECT.
> > - */
> > -#endif
> > -
> > - case EXTENDED_WDTR:
> > - /* The WD33C93A is only 8-bit. We respond with a MESSAGE_REJECT
> > - * to a wide data transfer request.
> > - */
> > - default:
> > - acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
> > - msgqueue_flush(&host->scsi.msgs);
> > - msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
> > - break;
> > - }
> > - break;
> > -
> > -#ifdef CONFIG_SCSI_ACORNSCSI_LINK
> > - case LINKED_CMD_COMPLETE:
> > - case LINKED_FLG_CMD_COMPLETE:
> > - /*
> > - * We don't support linked commands yet
> > - */
> > - if (0) {
> > -#if (DEBUG & DEBUG_LINK)
> > - printk("scsi%d.%c: lun %d tag %d linked command complete\n",
> > - host->host->host_no, acornscsi_target(host), host->SCpnt->tag);
> > -#endif
> > - /*
> > - * A linked command should only terminate with one of these messages
> > - * if there are more linked commands available.
> > - */
> > - if (!host->SCpnt->next_link) {
> > - printk(KERN_WARNING "scsi%d.%c: lun %d tag %d linked command complete, but no next_link\n",
> > - instance->host_no, acornscsi_target(host), host->SCpnt->tag);
> > - acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
> > - msgqueue_addmsg(&host->scsi.msgs, 1, ABORT);
> > - } else {
> > - struct scsi_cmnd *SCpnt = host->SCpnt;
> > -
> > - acornscsi_dma_cleanup(host);
> > -
> > - host->SCpnt = host->SCpnt->next_link;
> > - host->SCpnt->tag = SCpnt->tag;
> > - SCpnt->result = DID_OK | host->scsi.SCp.Message << 8 | host->Scsi.SCp.Status;
> > - SCpnt->done(SCpnt);
> > -
> > - /* initialise host->SCpnt->SCp */
> > - }
> > - break;
> > - }
> > -#endif
> > -
> > - default: /* reject message */
> > - printk(KERN_ERR "scsi%d.%c: unrecognised message %02X, rejecting\n",
> > - host->host->host_no, acornscsi_target(host),
> > - message[0]);
> > - acornscsi_sbic_issuecmd(host, CMND_ASSERTATN);
> > - msgqueue_flush(&host->scsi.msgs);
> > - msgqueue_addmsg(&host->scsi.msgs, 1, MESSAGE_REJECT);
> > - host->scsi.phase = PHASE_MSGIN;
> > - break;
> > - }
> > - acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
> > -}
> > -
> > -/*
> > - * Function: int acornscsi_buildmessages(AS_Host *host)
> > - * Purpose : build the connection messages for a host
> > - * Params : host - host to add messages to
> > - */
> > -static
> > -void acornscsi_buildmessages(AS_Host *host)
> > -{
> > -#if 0
> > - /* does the device need resetting? */
> > - if (cmd_reset) {
> > - msgqueue_addmsg(&host->scsi.msgs, 1, BUS_DEVICE_RESET);
> > - return;
> > - }
> > -#endif
> > -
> > - msgqueue_addmsg(&host->scsi.msgs, 1,
> > - IDENTIFY(host->device[host->SCpnt->device->id].disconnect_ok,
> > - host->SCpnt->device->lun));
> > -
> > -#if 0
> > - /* does the device need the current command aborted */
> > - if (cmd_aborted) {
> > - acornscsi_abortcmd(host->SCpnt->tag);
> > - return;
> > - }
> > -#endif
> > -
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - if (host->SCpnt->tag) {
> > - unsigned int tag_type;
> > -
> > - if (host->SCpnt->cmnd[0] == REQUEST_SENSE ||
> > - host->SCpnt->cmnd[0] == TEST_UNIT_READY ||
> > - host->SCpnt->cmnd[0] == INQUIRY)
> > - tag_type = HEAD_OF_QUEUE_TAG;
> > - else
> > - tag_type = SIMPLE_QUEUE_TAG;
> > - msgqueue_addmsg(&host->scsi.msgs, 2, tag_type, host->SCpnt->tag);
> > - }
> > -#endif
> > -
> > -#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
> > - if (host->device[host->SCpnt->device->id].sync_state == SYNC_NEGOCIATE) {
> > - host->device[host->SCpnt->device->id].sync_state = SYNC_SENT_REQUEST;
> > - msgqueue_addmsg(&host->scsi.msgs, 5,
> > - EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
> > - sdtr_period / 4, sdtr_size);
> > - }
> > -#endif
> > -}
> > -
> > -/*
> > - * Function: int acornscsi_starttransfer(AS_Host *host)
> > - * Purpose : transfer data to/from connected target
> > - * Params : host - host to which target is connected
> > - * Returns : 0 if failure
> > - */
> > -static
> > -int acornscsi_starttransfer(AS_Host *host)
> > -{
> > - int residual;
> > -
> > - if (!host->scsi.SCp.ptr /*&& host->scsi.SCp.this_residual*/) {
> > - printk(KERN_ERR "scsi%d.%c: null buffer passed to acornscsi_starttransfer\n",
> > - host->host->host_no, acornscsi_target(host));
> > - return 0;
> > - }
> > -
> > - residual = host->SCpnt->request_bufflen - host->scsi.SCp.scsi_xferred;
> > -
> > - sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
> > - sbic_arm_writenext(host->scsi.io_port, residual >> 16);
> > - sbic_arm_writenext(host->scsi.io_port, residual >> 8);
> > - sbic_arm_writenext(host->scsi.io_port, residual);
> > - acornscsi_sbic_issuecmd(host, CMND_XFERINFO);
> > - return 1;
> > -}
> > -
> > -/* =========================================================================================
> > - * Connection & Disconnection
> > - */
> > -/*
> > - * Function : acornscsi_reconnect(AS_Host *host)
> > - * Purpose : reconnect a previously disconnected command
> > - * Params : host - host specific data
> > - * Remarks : SCSI spec says:
> > - * 'The set of active pointers is restored from the set
> > - * of saved pointers upon reconnection of the I/O process'
> > - */
> > -static
> > -int acornscsi_reconnect(AS_Host *host)
> > -{
> > - unsigned int target, lun, ok = 0;
> > -
> > - target = sbic_arm_read(host->scsi.io_port, SBIC_SOURCEID);
> > -
> > - if (!(target & 8))
> > - printk(KERN_ERR "scsi%d: invalid source id after reselection "
> > - "- device fault?\n",
> > - host->host->host_no);
> > -
> > - target &= 7;
> > -
> > - if (host->SCpnt && !host->scsi.disconnectable) {
> > - printk(KERN_ERR "scsi%d.%d: reconnected while command in "
> > - "progress to target %d?\n",
> > - host->host->host_no, target, host->SCpnt->device->id);
> > - host->SCpnt = NULL;
> > - }
> > -
> > - lun = sbic_arm_read(host->scsi.io_port, SBIC_DATA) & 7;
> > -
> > - host->scsi.reconnected.target = target;
> > - host->scsi.reconnected.lun = lun;
> > - host->scsi.reconnected.tag = 0;
> > -
> > - if (host->scsi.disconnectable && host->SCpnt &&
> > - host->SCpnt->device->id == target && host->SCpnt->device->lun == lun)
> > - ok = 1;
> > -
> > - if (!ok && queue_probetgtlun(&host->queues.disconnected, target, lun))
> > - ok = 1;
> > -
> > - ADD_STATUS(target, 0x81, host->scsi.phase, 0);
> > -
> > - if (ok) {
> > - host->scsi.phase = PHASE_RECONNECTED;
> > - } else {
> > - /* this doesn't seem to work */
> > - printk(KERN_ERR "scsi%d.%c: reselected with no command "
> > - "to reconnect with\n",
> > - host->host->host_no, '0' + target);
> > - acornscsi_dumplog(host, target);
> > - acornscsi_abortcmd(host, 0);
> > - if (host->SCpnt) {
> > - queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
> > - host->SCpnt = NULL;
> > - }
> > - }
> > - acornscsi_sbic_issuecmd(host, CMND_NEGATEACK);
> > - return !ok;
> > -}
> > -
> > -/*
> > - * Function: int acornscsi_reconect_finish(AS_Host *host)
> > - * Purpose : finish reconnecting a command
> > - * Params : host - host to complete
> > - * Returns : 0 if failed
> > - */
> > -static
> > -int acornscsi_reconnect_finish(AS_Host *host)
> > -{
> > - if (host->scsi.disconnectable && host->SCpnt) {
> > - host->scsi.disconnectable = 0;
> > - if (host->SCpnt->device->id == host->scsi.reconnected.target &&
> > - host->SCpnt->device->lun == host->scsi.reconnected.lun &&
> > - host->SCpnt->tag == host->scsi.reconnected.tag) {
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - DBG(host->SCpnt, printk("scsi%d.%c: reconnected",
> > - host->host->host_no, acornscsi_target(host)));
> > -#endif
> > - } else {
> > - queue_add_cmd_tail(&host->queues.disconnected, host->SCpnt);
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - DBG(host->SCpnt, printk("scsi%d.%c: had to move command "
> > - "to disconnected queue\n",
> > - host->host->host_no, acornscsi_target(host)));
> > -#endif
> > - host->SCpnt = NULL;
> > - }
> > - }
> > - if (!host->SCpnt) {
> > - host->SCpnt = queue_remove_tgtluntag(&host->queues.disconnected,
> > - host->scsi.reconnected.target,
> > - host->scsi.reconnected.lun,
> > - host->scsi.reconnected.tag);
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - DBG(host->SCpnt, printk("scsi%d.%c: had to get command",
> > - host->host->host_no, acornscsi_target(host)));
> > -#endif
> > - }
> > -
> > - if (!host->SCpnt)
> > - acornscsi_abortcmd(host, host->scsi.reconnected.tag);
> > - else {
> > - /*
> > - * Restore data pointer from SAVED pointers.
> > - */
> > - host->scsi.SCp = host->SCpnt->SCp;
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - printk(", data pointers: [%p, %X]",
> > - host->scsi.SCp.ptr, host->scsi.SCp.this_residual);
> > -#endif
> > - }
> > -#if (DEBUG & (DEBUG_QUEUES|DEBUG_DISCON))
> > - printk("\n");
> > -#endif
> > -
> > - host->dma.transferred = host->scsi.SCp.scsi_xferred;
> > -
> > - return host->SCpnt != NULL;
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_disconnect_unexpected(AS_Host *host)
> > - * Purpose : handle an unexpected disconnect
> > - * Params : host - host on which disconnect occurred
> > - */
> > -static
> > -void acornscsi_disconnect_unexpected(AS_Host *host)
> > -{
> > - printk(KERN_ERR "scsi%d.%c: unexpected disconnect\n",
> > - host->host->host_no, acornscsi_target(host));
> > -#if (DEBUG & DEBUG_ABORT)
> > - acornscsi_dumplog(host, 8);
> > -#endif
> > -
> > - acornscsi_done(host, &host->SCpnt, DID_ERROR);
> > -}
> > -
> > -/*
> > - * Function: void acornscsi_abortcmd(AS_host *host, unsigned char tag)
> > - * Purpose : abort a currently executing command
> > - * Params : host - host with connected command to abort
> > - * tag - tag to abort
> > - */
> > -static
> > -void acornscsi_abortcmd(AS_Host *host, unsigned char tag)
> > -{
> > - host->scsi.phase = PHASE_ABORTED;
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_ASSERTATN);
> > -
> > - msgqueue_flush(&host->scsi.msgs);
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - if (tag)
> > - msgqueue_addmsg(&host->scsi.msgs, 2, ABORT_TAG, tag);
> > - else
> > -#endif
> > - msgqueue_addmsg(&host->scsi.msgs, 1, ABORT);
> > -}
> > -
> > -/* ==========================================================================================
> > - * Interrupt routines.
> > - */
> > -/*
> > - * Function: int acornscsi_sbicintr(AS_Host *host)
> > - * Purpose : handle interrupts from SCSI device
> > - * Params : host - host to process
> > - * Returns : INTR_PROCESS if expecting another SBIC interrupt
> > - * INTR_IDLE if no interrupt
> > - * INTR_NEXT_COMMAND if we have finished processing the command
> > - */
> > -static
> > -intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
> > -{
> > - unsigned int asr, ssr;
> > -
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - if (!(asr & ASR_INT))
> > - return INTR_IDLE;
> > -
> > - ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > -
> > -#if (DEBUG & DEBUG_PHASES)
> > - print_sbic_status(asr, ssr, host->scsi.phase);
> > -#endif
> > -
> > - ADD_STATUS(8, ssr, host->scsi.phase, in_irq);
> > -
> > - if (host->SCpnt && !host->scsi.disconnectable)
> > - ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
> > -
> > - switch (ssr) {
> > - case 0x00: /* reset state - not advanced */
> > - printk(KERN_ERR "scsi%d: reset in standard mode but wanted advanced mode.\n",
> > - host->host->host_no);
> > - /* setup sbic - WD33C93A */
> > - sbic_arm_write(host->scsi.io_port, SBIC_OWNID, OWNID_EAF | host->host->this_id);
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_RESET);
> > - return INTR_IDLE;
> > -
> > - case 0x01: /* reset state - advanced */
> > - sbic_arm_write(host->scsi.io_port, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
> > - sbic_arm_write(host->scsi.io_port, SBIC_TIMEOUT, TIMEOUT_TIME);
> > - sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
> > - sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
> > - msgqueue_flush(&host->scsi.msgs);
> > - return INTR_IDLE;
> > -
> > - case 0x41: /* unexpected disconnect aborted command */
> > - acornscsi_disconnect_unexpected(host);
> > - return INTR_NEXT_COMMAND;
> > - }
> > -
> > - switch (host->scsi.phase) {
> > - case PHASE_CONNECTING: /* STATE: command removed from issue queue */
> > - switch (ssr) {
> > - case 0x11: /* -> PHASE_CONNECTED */
> > - /* BUS FREE -> SELECTION */
> > - host->scsi.phase = PHASE_CONNECTED;
> > - msgqueue_flush(&host->scsi.msgs);
> > - host->dma.transferred = host->scsi.SCp.scsi_xferred;
> > - /* 33C93 gives next interrupt indicating bus phase */
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - if (!(asr & ASR_INT))
> > - break;
> > - ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > - ADD_STATUS(8, ssr, host->scsi.phase, 1);
> > - ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, 1);
> > - goto connected;
> > -
> > - case 0x42: /* select timed out */
> > - /* -> PHASE_IDLE */
> > - acornscsi_done(host, &host->SCpnt, DID_NO_CONNECT);
> > - return INTR_NEXT_COMMAND;
> > -
> > - case 0x81: /* -> PHASE_RECONNECTED or PHASE_ABORTED */
> > - /* BUS FREE -> RESELECTION */
> > - host->origSCpnt = host->SCpnt;
> > - host->SCpnt = NULL;
> > - msgqueue_flush(&host->scsi.msgs);
> > - acornscsi_reconnect(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTING, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - connected:
> > - case PHASE_CONNECTED: /* STATE: device selected ok */
> > - switch (ssr) {
> > -#ifdef NONSTANDARD
> > - case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
> > - /* SELECTION -> COMMAND */
> > - acornscsi_sendcommand(host);
> > - break;
> > -
> > - case 0x8b: /* -> PHASE_STATUS */
> > - /* SELECTION -> STATUS */
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -#endif
> > -
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* SELECTION ->MESSAGE OUT */
> > - host->scsi.phase = PHASE_MSGOUT;
> > - acornscsi_buildmessages(host);
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - /* these should not happen */
> > - case 0x85: /* target disconnected */
> > - acornscsi_done(host, &host->SCpnt, DID_ERROR);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_CONNECTED, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_MSGOUT: /* STATE: connected & sent IDENTIFY message */
> > - /*
> > - * SCSI standard says that MESSAGE OUT phases can be followed by a
> > - * DATA phase, STATUS phase, MESSAGE IN phase or COMMAND phase
> > - */
> > - switch (ssr) {
> > - case 0x8a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
> > - case 0x1a: /* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
> > - /* MESSAGE OUT -> COMMAND */
> > - acornscsi_sendcommand(host);
> > - break;
> > -
> > - case 0x8b: /* -> PHASE_STATUS */
> > - case 0x1b: /* -> PHASE_STATUS */
> > - /* MESSAGE OUT -> STATUS */
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* MESSAGE_OUT(MESSAGE_IN) ->MESSAGE OUT */
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x4f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - /* MESSAGE OUT -> MESSAGE IN */
> > - acornscsi_message(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_MSGOUT, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_COMMAND: /* STATE: connected & command sent */
> > - switch (ssr) {
> > - case 0x18: /* -> PHASE_DATAOUT */
> > - /* COMMAND -> DATA OUT */
> > - if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - acornscsi_dma_setup(host, DMA_OUT);
> > - if (!acornscsi_starttransfer(host))
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - host->scsi.phase = PHASE_DATAOUT;
> > - return INTR_IDLE;
> > -
> > - case 0x19: /* -> PHASE_DATAIN */
> > - /* COMMAND -> DATA IN */
> > - if (host->scsi.SCp.sent_command != host->SCpnt->cmd_len)
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - acornscsi_dma_setup(host, DMA_IN);
> > - if (!acornscsi_starttransfer(host))
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - host->scsi.phase = PHASE_DATAIN;
> > - return INTR_IDLE;
> > -
> > - case 0x1b: /* -> PHASE_STATUS */
> > - /* COMMAND -> STATUS */
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -
> > - case 0x1e: /* -> PHASE_MSGOUT */
> > - /* COMMAND -> MESSAGE OUT */
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x1f: /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - /* COMMAND -> MESSAGE IN */
> > - acornscsi_message(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_COMMAND, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_DISCONNECT: /* STATE: connected, received DISCONNECT msg */
> > - if (ssr == 0x85) { /* -> PHASE_IDLE */
> > - host->scsi.disconnectable = 1;
> > - host->scsi.reconnected.tag = 0;
> > - host->scsi.phase = PHASE_IDLE;
> > - host->stats.disconnects += 1;
> > - } else {
> > - printk(KERN_ERR "scsi%d.%c: PHASE_DISCONNECT, SSR %02X instead of disconnect?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_NEXT_COMMAND;
> > -
> > - case PHASE_IDLE: /* STATE: disconnected */
> > - if (ssr == 0x81) /* -> PHASE_RECONNECTED or PHASE_ABORTED */
> > - acornscsi_reconnect(host);
> > - else {
> > - printk(KERN_ERR "scsi%d.%c: PHASE_IDLE, SSR %02X while idle?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_RECONNECTED: /* STATE: device reconnected to initiator */
> > - /*
> > - * Command reconnected - if MESGIN, get message - it may be
> > - * the tag. If not, get command out of disconnected queue
> > - */
> > - /*
> > - * If we reconnected and we're not in MESSAGE IN phase after IDENTIFY,
> > - * reconnect I_T_L command
> > - */
> > - if (ssr != 0x8f && !acornscsi_reconnect_finish(host))
> > - return INTR_IDLE;
> > - ADD_STATUS(host->SCpnt->device->id, ssr, host->scsi.phase, in_irq);
> > - switch (ssr) {
> > - case 0x88: /* data out phase */
> > - /* -> PHASE_DATAOUT */
> > - /* MESSAGE IN -> DATA OUT */
> > - acornscsi_dma_setup(host, DMA_OUT);
> > - if (!acornscsi_starttransfer(host))
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - host->scsi.phase = PHASE_DATAOUT;
> > - return INTR_IDLE;
> > -
> > - case 0x89: /* data in phase */
> > - /* -> PHASE_DATAIN */
> > - /* MESSAGE IN -> DATA IN */
> > - acornscsi_dma_setup(host, DMA_IN);
> > - if (!acornscsi_starttransfer(host))
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - host->scsi.phase = PHASE_DATAIN;
> > - return INTR_IDLE;
> > -
> > - case 0x8a: /* command out */
> > - /* MESSAGE IN -> COMMAND */
> > - acornscsi_sendcommand(host);/* -> PHASE_COMMAND, PHASE_COMMANDPAUSED */
> > - break;
> > -
> > - case 0x8b: /* status in */
> > - /* -> PHASE_STATUSIN */
> > - /* MESSAGE IN -> STATUS */
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -
> > - case 0x8e: /* message out */
> > - /* -> PHASE_MSGOUT */
> > - /* MESSAGE IN -> MESSAGE OUT */
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x8f: /* message in */
> > - acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_RECONNECTED, SSR %02X after reconnect?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_DATAIN: /* STATE: transferred data in */
> > - /*
> > - * This is simple - if we disconnect then the DMA address & count is
> > - * correct.
> > - */
> > - switch (ssr) {
> > - case 0x19: /* -> PHASE_DATAIN */
> > - case 0x89: /* -> PHASE_DATAIN */
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - return INTR_IDLE;
> > -
> > - case 0x1b: /* -> PHASE_STATUSIN */
> > - case 0x4b: /* -> PHASE_STATUSIN */
> > - case 0x8b: /* -> PHASE_STATUSIN */
> > - /* DATA IN -> STATUS */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -
> > - case 0x1e: /* -> PHASE_MSGOUT */
> > - case 0x4e: /* -> PHASE_MSGOUT */
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* DATA IN -> MESSAGE OUT */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x1f: /* message in */
> > - case 0x4f: /* message in */
> > - case 0x8f: /* message in */
> > - /* DATA IN -> MESSAGE IN */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_DATAIN, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_DATAOUT: /* STATE: transferred data out */
> > - /*
> > - * This is more complicated - if we disconnect, the DMA could be 12
> > - * bytes ahead of us. We need to correct this.
> > - */
> > - switch (ssr) {
> > - case 0x18: /* -> PHASE_DATAOUT */
> > - case 0x88: /* -> PHASE_DATAOUT */
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - return INTR_IDLE;
> > -
> > - case 0x1b: /* -> PHASE_STATUSIN */
> > - case 0x4b: /* -> PHASE_STATUSIN */
> > - case 0x8b: /* -> PHASE_STATUSIN */
> > - /* DATA OUT -> STATUS */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_dma_adjust(host);
> > - acornscsi_readstatusbyte(host);
> > - host->scsi.phase = PHASE_STATUSIN;
> > - break;
> > -
> > - case 0x1e: /* -> PHASE_MSGOUT */
> > - case 0x4e: /* -> PHASE_MSGOUT */
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* DATA OUT -> MESSAGE OUT */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_dma_adjust(host);
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x1f: /* message in */
> > - case 0x4f: /* message in */
> > - case 0x8f: /* message in */
> > - /* DATA OUT -> MESSAGE IN */
> > - host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
> > - acornscsi_sbic_xfcount(host);
> > - acornscsi_dma_stop(host);
> > - acornscsi_dma_adjust(host);
> > - acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_DATAOUT, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_STATUSIN: /* STATE: status in complete */
> > - switch (ssr) {
> > - case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
> > - case 0x8f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
> > - /* STATUS -> MESSAGE IN */
> > - acornscsi_message(host);
> > - break;
> > -
> > - case 0x1e: /* -> PHASE_MSGOUT */
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* STATUS -> MESSAGE OUT */
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_STATUSIN, SSR %02X instead of MESSAGE_IN?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_MSGIN: /* STATE: message in */
> > - switch (ssr) {
> > - case 0x1e: /* -> PHASE_MSGOUT */
> > - case 0x4e: /* -> PHASE_MSGOUT */
> > - case 0x8e: /* -> PHASE_MSGOUT */
> > - /* MESSAGE IN -> MESSAGE OUT */
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - case 0x1f: /* -> PHASE_MSGIN, PHASE_DONE, PHASE_DISCONNECT */
> > - case 0x2f:
> > - case 0x4f:
> > - case 0x8f:
> > - acornscsi_message(host);
> > - break;
> > -
> > - case 0x85:
> > - printk("scsi%d.%c: strange message in disconnection\n",
> > - host->host->host_no, acornscsi_target(host));
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - acornscsi_done(host, &host->SCpnt, DID_ERROR);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_MSGIN, SSR %02X after message in?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_DONE: /* STATE: received status & message */
> > - switch (ssr) {
> > - case 0x85: /* -> PHASE_IDLE */
> > - acornscsi_done(host, &host->SCpnt, DID_OK);
> > - return INTR_NEXT_COMMAND;
> > -
> > - case 0x1e:
> > - case 0x8e:
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_DONE, SSR %02X instead of disconnect?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - case PHASE_ABORTED:
> > - switch (ssr) {
> > - case 0x85:
> > - if (host->SCpnt)
> > - acornscsi_done(host, &host->SCpnt, DID_ABORT);
> > - else {
> > - clear_bit(host->scsi.reconnected.target * 8 + host->scsi.reconnected.lun,
> > - host->busyluns);
> > - host->scsi.phase = PHASE_IDLE;
> > - }
> > - return INTR_NEXT_COMMAND;
> > -
> > - case 0x1e:
> > - case 0x2e:
> > - case 0x4e:
> > - case 0x8e:
> > - acornscsi_sendmessage(host);
> > - break;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: PHASE_ABORTED, SSR %02X?\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -
> > - default:
> > - printk(KERN_ERR "scsi%d.%c: unknown driver phase %d\n",
> > - host->host->host_no, acornscsi_target(host), ssr);
> > - acornscsi_dumplog(host, host->SCpnt ? host->SCpnt->device->id : 8);
> > - }
> > - return INTR_PROCESSING;
> > -}
> > -
> > -/*
> > - * Prototype: void acornscsi_intr(int irq, void *dev_id)
> > - * Purpose : handle interrupts from Acorn SCSI card
> > - * Params : irq - interrupt number
> > - * dev_id - device specific data (AS_Host structure)
> > - */
> > -static irqreturn_t
> > -acornscsi_intr(int irq, void *dev_id)
> > -{
> > - AS_Host *host = (AS_Host *)dev_id;
> > - intr_ret_t ret;
> > - int iostatus;
> > - int in_irq = 0;
> > -
> > - do {
> > - ret = INTR_IDLE;
> > -
> > - iostatus = inb(host->card.io_intr);
> > -
> > - if (iostatus & 2) {
> > - acornscsi_dma_intr(host);
> > - iostatus = inb(host->card.io_intr);
> > - }
> > -
> > - if (iostatus & 8)
> > - ret = acornscsi_sbicintr(host, in_irq);
> > -
> > - /*
> > - * If we have a transfer pending, start it.
> > - * Only start it if the interface has already started transferring
> > - * it's data
> > - */
> > - if (host->dma.xfer_required)
> > - acornscsi_dma_xfer(host);
> > -
> > - if (ret == INTR_NEXT_COMMAND)
> > - ret = acornscsi_kick(host);
> > -
> > - in_irq = 1;
> > - } while (ret != INTR_IDLE);
> > -
> > - return IRQ_HANDLED;
> > -}
> > -
> > -/*=============================================================================================
> > - * Interfaces between interrupt handler and rest of scsi code
> > - */
> > -
> > -/*
> > - * Function : acornscsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
> > - * Purpose : queues a SCSI command
> > - * Params : cmd - SCSI command
> > - * done - function called on completion, with pointer to command descriptor
> > - * Returns : 0, or < 0 on error.
> > - */
> > -int acornscsi_queuecmd(struct scsi_cmnd *SCpnt,
> > - void (*done)(struct scsi_cmnd *))
> > -{
> > - AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
> > -
> > - if (!done) {
> > - /* there should be some way of rejecting errors like this without panicing... */
> > - panic("scsi%d: queuecommand called with NULL done function [cmd=%p]",
> > - host->host->host_no, SCpnt);
> > - return -EINVAL;
> > - }
> > -
> > -#if (DEBUG & DEBUG_NO_WRITE)
> > - if (acornscsi_cmdtype(SCpnt->cmnd[0]) == CMD_WRITE && (NO_WRITE & (1 << SCpnt->device->id))) {
> > - printk(KERN_CRIT "scsi%d.%c: WRITE attempted with NO_WRITE flag set\n",
> > - host->host->host_no, '0' + SCpnt->device->id);
> > - SCpnt->result = DID_NO_CONNECT << 16;
> > - done(SCpnt);
> > - return 0;
> > - }
> > -#endif
> > -
> > - SCpnt->scsi_done = done;
> > - SCpnt->host_scribble = NULL;
> > - SCpnt->result = 0;
> > - SCpnt->tag = 0;
> > - SCpnt->SCp.phase = (int)acornscsi_datadirection(SCpnt->cmnd[0]);
> > - SCpnt->SCp.sent_command = 0;
> > - SCpnt->SCp.scsi_xferred = 0;
> > -
> > - init_SCp(SCpnt);
> > -
> > - host->stats.queues += 1;
> > -
> > - {
> > - unsigned long flags;
> > -
> > - if (!queue_add_cmd_ordered(&host->queues.issue, SCpnt)) {
> > - SCpnt->result = DID_ERROR << 16;
> > - done(SCpnt);
> > - return 0;
> > - }
> > - local_irq_save(flags);
> > - if (host->scsi.phase == PHASE_IDLE)
> > - acornscsi_kick(host);
> > - local_irq_restore(flags);
> > - }
> > - return 0;
> > -}
> > -
> > -/*
> > - * Prototype: void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1, struct scsi_cmnd **SCpntp2, int result)
> > - * Purpose : pass a result to *SCpntp1, and check if *SCpntp1 = *SCpntp2
> > - * Params : SCpntp1 - pointer to command to return
> > - * SCpntp2 - pointer to command to check
> > - * result - result to pass back to mid-level done function
> > - * Returns : *SCpntp2 = NULL if *SCpntp1 is the same command structure as *SCpntp2.
> > - */
> > -static inline void acornscsi_reportstatus(struct scsi_cmnd **SCpntp1,
> > - struct scsi_cmnd **SCpntp2,
> > - int result)
> > -{
> > - struct scsi_cmnd *SCpnt = *SCpntp1;
> > -
> > - if (SCpnt) {
> > - *SCpntp1 = NULL;
> > -
> > - SCpnt->result = result;
> > - SCpnt->scsi_done(SCpnt);
> > - }
> > -
> > - if (SCpnt == *SCpntp2)
> > - *SCpntp2 = NULL;
> > -}
> > -
> > -enum res_abort { res_not_running, res_success, res_success_clear, res_snooze };
> > -
> > -/*
> > - * Prototype: enum res acornscsi_do_abort(struct scsi_cmnd *SCpnt)
> > - * Purpose : abort a command on this host
> > - * Params : SCpnt - command to abort
> > - * Returns : our abort status
> > - */
> > -static enum res_abort acornscsi_do_abort(AS_Host *host, struct scsi_cmnd *SCpnt)
> > -{
> > - enum res_abort res = res_not_running;
> > -
> > - if (queue_remove_cmd(&host->queues.issue, SCpnt)) {
> > - /*
> > - * The command was on the issue queue, and has not been
> > - * issued yet. We can remove the command from the queue,
> > - * and acknowledge the abort. Neither the devices nor the
> > - * interface know about the command.
> > - */
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("on issue queue ");
> > -//#endif
> > - res = res_success;
> > - } else if (queue_remove_cmd(&host->queues.disconnected, SCpnt)) {
> > - /*
> > - * The command was on the disconnected queue. Simply
> > - * acknowledge the abort condition, and when the target
> > - * reconnects, we will give it an ABORT message. The
> > - * target should then disconnect, and we will clear
> > - * the busylun bit.
> > - */
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("on disconnected queue ");
> > -//#endif
> > - res = res_success;
> > - } else if (host->SCpnt == SCpnt) {
> > - unsigned long flags;
> > -
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("executing ");
> > -//#endif
> > -
> > - local_irq_save(flags);
> > - switch (host->scsi.phase) {
> > - /*
> > - * If the interface is idle, and the command is 'disconnectable',
> > - * then it is the same as on the disconnected queue. We simply
> > - * remove all traces of the command. When the target reconnects,
> > - * we will give it an ABORT message since the command could not
> > - * be found. When the target finally disconnects, we will clear
> > - * the busylun bit.
> > - */
> > - case PHASE_IDLE:
> > - if (host->scsi.disconnectable) {
> > - host->scsi.disconnectable = 0;
> > - host->SCpnt = NULL;
> > - res = res_success;
> > - }
> > - break;
> > -
> > - /*
> > - * If the command has connected and done nothing further,
> > - * simply force a disconnect. We also need to clear the
> > - * busylun bit.
> > - */
> > - case PHASE_CONNECTED:
> > - sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_DISCONNECT);
> > - host->SCpnt = NULL;
> > - res = res_success_clear;
> > - break;
> > -
> > - default:
> > - acornscsi_abortcmd(host, host->SCpnt->tag);
> > - res = res_snooze;
> > - }
> > - local_irq_restore(flags);
> > - } else if (host->origSCpnt == SCpnt) {
> > - /*
> > - * The command will be executed next, but a command
> > - * is currently using the interface. This is similar to
> > - * being on the issue queue, except the busylun bit has
> > - * been set.
> > - */
> > - host->origSCpnt = NULL;
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("waiting for execution ");
> > -//#endif
> > - res = res_success_clear;
> > - } else
> > - printk("unknown ");
> > -
> > - return res;
> > -}
> > -
> > -/*
> > - * Prototype: int acornscsi_abort(struct scsi_cmnd *SCpnt)
> > - * Purpose : abort a command on this host
> > - * Params : SCpnt - command to abort
> > - * Returns : one of SCSI_ABORT_ macros
> > - */
> > -int acornscsi_abort(struct scsi_cmnd *SCpnt)
> > -{
> > - AS_Host *host = (AS_Host *) SCpnt->device->host->hostdata;
> > - int result;
> > -
> > - host->stats.aborts += 1;
> > -
> > -#if (DEBUG & DEBUG_ABORT)
> > - {
> > - int asr, ssr;
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > -
> > - printk(KERN_WARNING "acornscsi_abort: ");
> > - print_sbic_status(asr, ssr, host->scsi.phase);
> > - acornscsi_dumplog(host, SCpnt->device->id);
> > - }
> > -#endif
> > -
> > - printk("scsi%d: ", host->host->host_no);
> > -
> > - switch (acornscsi_do_abort(host, SCpnt)) {
> > - /*
> > - * We managed to find the command and cleared it out.
> > - * We do not expect the command to be executing on the
> > - * target, but we have set the busylun bit.
> > - */
> > - case res_success_clear:
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("clear ");
> > -//#endif
> > - clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, host->busyluns);
> > -
> > - /*
> > - * We found the command, and cleared it out. Either
> > - * the command is still known to be executing on the
> > - * target, or the busylun bit is not set.
> > - */
> > - case res_success:
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("success\n");
> > -//#endif
> > - SCpnt->result = DID_ABORT << 16;
> > - SCpnt->scsi_done(SCpnt);
> > - result = SCSI_ABORT_SUCCESS;
> > - break;
> > -
> > - /*
> > - * We did find the command, but unfortunately we couldn't
> > - * unhook it from ourselves. Wait some more, and if it
> > - * still doesn't complete, reset the interface.
> > - */
> > - case res_snooze:
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("snooze\n");
> > -//#endif
> > - result = SCSI_ABORT_SNOOZE;
> > - break;
> > -
> > - /*
> > - * The command could not be found (either because it completed,
> > - * or it got dropped.
> > - */
> > - default:
> > - case res_not_running:
> > - acornscsi_dumplog(host, SCpnt->device->id);
> > -#if (DEBUG & DEBUG_ABORT)
> > - result = SCSI_ABORT_SNOOZE;
> > -#else
> > - result = SCSI_ABORT_NOT_RUNNING;
> > -#endif
> > -//#if (DEBUG & DEBUG_ABORT)
> > - printk("not running\n");
> > -//#endif
> > - break;
> > - }
> > -
> > - return result;
> > -}
> > -
> > -/*
> > - * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt, unsigned int reset_flags)
> > - * Purpose : reset a command on this host/reset this host
> > - * Params : SCpnt - command causing reset
> > - * result - what type of reset to perform
> > - * Returns : one of SCSI_RESET_ macros
> > - */
> > -int acornscsi_reset(struct scsi_cmnd *SCpnt, unsigned int reset_flags)
> > -{
> > - AS_Host *host = (AS_Host *)SCpnt->device->host->hostdata;
> > - struct scsi_cmnd *SCptr;
> > -
> > - host->stats.resets += 1;
> > -
> > -#if (DEBUG & DEBUG_RESET)
> > - {
> > - int asr, ssr;
> > -
> > - asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
> > - ssr = sbic_arm_read(host->scsi.io_port, SBIC_SSR);
> > -
> > - printk(KERN_WARNING "acornscsi_reset: ");
> > - print_sbic_status(asr, ssr, host->scsi.phase);
> > - acornscsi_dumplog(host, SCpnt->device->id);
> > - }
> > -#endif
> > -
> > - acornscsi_dma_stop(host);
> > -
> > - SCptr = host->SCpnt;
> > -
> > - /*
> > - * do hard reset. This resets all devices on this host, and so we
> > - * must set the reset status on all commands.
> > - */
> > - acornscsi_resetcard(host);
> > -
> > - /*
> > - * report reset on commands current connected/disconnected
> > - */
> > - acornscsi_reportstatus(&host->SCpnt, &SCptr, DID_RESET);
> > -
> > - while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL)
> > - acornscsi_reportstatus(&SCptr, &SCpnt, DID_RESET);
> > -
> > - if (SCpnt) {
> > - SCpnt->result = DID_RESET << 16;
> > - SCpnt->scsi_done(SCpnt);
> > - }
> > -
> > - return SCSI_RESET_BUS_RESET | SCSI_RESET_HOST_RESET | SCSI_RESET_SUCCESS;
> > -}
> > -
> > -/*==============================================================================================
> > - * initialisation & miscellaneous support
> > - */
> > -
> > -/*
> > - * Function: char *acornscsi_info(struct Scsi_Host *host)
> > - * Purpose : return a string describing this interface
> > - * Params : host - host to give information on
> > - * Returns : a constant string
> > - */
> > -const
> > -char *acornscsi_info(struct Scsi_Host *host)
> > -{
> > - static char string[100], *p;
> > -
> > - p = string;
> > -
> > - p += sprintf(string, "%s at port %08lX irq %d v%d.%d.%d"
> > -#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
> > - " SYNC"
> > -#endif
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - " TAG"
> > -#endif
> > -#ifdef CONFIG_SCSI_ACORNSCSI_LINK
> > - " LINK"
> > -#endif
> > -#if (DEBUG & DEBUG_NO_WRITE)
> > - " NOWRITE ("NO_WRITE_STR")"
> > -#endif
> > - , host->hostt->name, host->io_port, host->irq,
> > - VER_MAJOR, VER_MINOR, VER_PATCH);
> > - return string;
> > -}
> > -
> > -int acornscsi_proc_info(struct Scsi_Host *instance, char *buffer, char **start, off_t offset,
> > - int length, int inout)
> > -{
> > - int pos, begin = 0, devidx;
> > - struct scsi_device *scd;
> > - AS_Host *host;
> > - char *p = buffer;
> > -
> > - if (inout == 1)
> > - return -EINVAL;
> > -
> > - host = (AS_Host *)instance->hostdata;
> > -
> > - p += sprintf(p, "AcornSCSI driver v%d.%d.%d"
> > -#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
> > - " SYNC"
> > -#endif
> > -#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
> > - " TAG"
> > -#endif
> > -#ifdef CONFIG_SCSI_ACORNSCSI_LINK
> > - " LINK"
> > -#endif
> > -#if (DEBUG & DEBUG_NO_WRITE)
> > - " NOWRITE ("NO_WRITE_STR")"
> > -#endif
> > - "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH);
> > -
> > - p += sprintf(p, "SBIC: WD33C93A Address: %08X IRQ : %d\n",
> > - host->scsi.io_port, host->scsi.irq);
> > -#ifdef USE_DMAC
> > - p += sprintf(p, "DMAC: uPC71071 Address: %08X IRQ : %d\n\n",
> > - host->dma.io_port, host->scsi.irq);
> > -#endif
> > -
> > - p += sprintf(p, "Statistics:\n"
> > - "Queued commands: %-10u Issued commands: %-10u\n"
> > - "Done commands : %-10u Reads : %-10u\n"
> > - "Writes : %-10u Others : %-10u\n"
> > - "Disconnects : %-10u Aborts : %-10u\n"
> > - "Resets : %-10u\n\nLast phases:",
> > - host->stats.queues, host->stats.removes,
> > - host->stats.fins, host->stats.reads,
> > - host->stats.writes, host->stats.miscs,
> > - host->stats.disconnects, host->stats.aborts,
> > - host->stats.resets);
> > -
> > - for (devidx = 0; devidx < 9; devidx ++) {
> > - unsigned int statptr, prev;
> > -
> > - p += sprintf(p, "\n%c:", devidx == 8 ? 'H' : ('0' + devidx));
> > - statptr = host->status_ptr[devidx] - 10;
> > -
> > - if ((signed int)statptr < 0)
> > - statptr += STATUS_BUFFER_SIZE;
> > -
> > - prev = host->status[devidx][statptr].when;
> > -
> > - for (; statptr != host->status_ptr[devidx]; statptr = (statptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
> > - if (host->status[devidx][statptr].when) {
> > - p += sprintf(p, "%c%02X:%02X+%2ld",
> > - host->status[devidx][statptr].irq ? '-' : ' ',
> > - host->status[devidx][statptr].ph,
> > - host->status[devidx][statptr].ssr,
> > - (host->status[devidx][statptr].when - prev) < 100 ?
> > - (host->status[devidx][statptr].when - prev) : 99);
> > - prev = host->status[devidx][statptr].when;
> > - }
> > - }
> > - }
> > -
> > - p += sprintf(p, "\nAttached devices:\n");
> > -
> > - shost_for_each_device(scd, instance) {
> > - p += sprintf(p, "Device/Lun TaggedQ Sync\n");
> > - p += sprintf(p, " %d/%d ", scd->id, scd->lun);
> > - if (scd->tagged_supported)
> > - p += sprintf(p, "%3sabled(%3d) ",
> > - scd->simple_tags ? "en" : "dis",
> > - scd->current_tag);
> > - else
> > - p += sprintf(p, "unsupported ");
> > -
> > - if (host->device[scd->id].sync_xfer & 15)
> > - p += sprintf(p, "offset %d, %d ns\n",
> > - host->device[scd->id].sync_xfer & 15,
> > - acornscsi_getperiod(host->device[scd->id].sync_xfer));
> > - else
> > - p += sprintf(p, "async\n");
> > -
> > - pos = p - buffer;
> > - if (pos + begin < offset) {
> > - begin += pos;
> > - p = buffer;
> > - }
> > - pos = p - buffer;
> > - if (pos + begin > offset + length) {
> > - scsi_device_put(scd);
> > - break;
> > - }
> > - }
> > -
> > - pos = p - buffer;
> > -
> > - *start = buffer + (offset - begin);
> > - pos -= offset - begin;
> > -
> > - if (pos > length)
> > - pos = length;
> > -
> > - return pos;
> > -}
> > -
> > -static struct scsi_host_template acornscsi_template = {
> > - .module = THIS_MODULE,
> > - .proc_info = acornscsi_proc_info,
> > - .name = "AcornSCSI",
> > - .info = acornscsi_info,
> > - .queuecommand = acornscsi_queuecmd,
> > -#warning fixme
> > - .abort = acornscsi_abort,
> > - .reset = acornscsi_reset,
> > - .can_queue = 16,
> > - .this_id = 7,
> > - .sg_tablesize = SG_ALL,
> > - .cmd_per_lun = 2,
> > - .unchecked_isa_dma = 0,
> > - .use_clustering = DISABLE_CLUSTERING,
> > - .proc_name = "acornscsi",
> > -};
> > -
> > -static int __devinit
> > -acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
> > -{
> > - struct Scsi_Host *host;
> > - AS_Host *ashost;
> > - int ret = -ENOMEM;
> > -
> > - host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host));
> > - if (!host)
> > - goto out;
> > -
> > - ashost = (AS_Host *)host->hostdata;
> > -
> > - host->io_port = ecard_address(ec, ECARD_MEMC, 0);
> > - host->irq = ec->irq;
> > -
> > - ashost->host = host;
> > - ashost->scsi.io_port = ioaddr(host->io_port + 0x800);
> > - ashost->scsi.irq = host->irq;
> > - ashost->card.io_intr = POD_SPACE(host->io_port) + 0x800;
> > - ashost->card.io_page = POD_SPACE(host->io_port) + 0xc00;
> > - ashost->card.io_ram = ioaddr(host->io_port);
> > - ashost->dma.io_port = host->io_port + 0xc00;
> > - ashost->dma.io_intr_clear = POD_SPACE(host->io_port) + 0x800;
> > -
> > - ec->irqaddr = (char *)ioaddr(ashost->card.io_intr);
> > - ec->irqmask = 0x0a;
> > -
> > - ret = -EBUSY;
> > - if (!request_region(host->io_port + 0x800, 2, "acornscsi(sbic)"))
> > - goto err_1;
> > - if (!request_region(ashost->card.io_intr, 1, "acornscsi(intr)"))
> > - goto err_2;
> > - if (!request_region(ashost->card.io_page, 1, "acornscsi(page)"))
> > - goto err_3;
> > -#ifdef USE_DMAC
> > - if (!request_region(ashost->dma.io_port, 256, "acornscsi(dmac)"))
> > - goto err_4;
> > -#endif
> > - if (!request_region(host->io_port, 2048, "acornscsi(ram)"))
> > - goto err_5;
> > -
> > - ret = request_irq(host->irq, acornscsi_intr, IRQF_DISABLED, "acornscsi", ashost);
> > - if (ret) {
> > - printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n",
> > - host->host_no, ashost->scsi.irq, ret);
> > - goto err_6;
> > - }
> > -
> > - memset(&ashost->stats, 0, sizeof (ashost->stats));
> > - queue_initialise(&ashost->queues.issue);
> > - queue_initialise(&ashost->queues.disconnected);
> > - msgqueue_initialise(&ashost->scsi.msgs);
> > -
> > - acornscsi_resetcard(ashost);
> > -
> > - ret = scsi_add_host(host, &ec->dev);
> > - if (ret)
> > - goto err_7;
> > -
> > - scsi_scan_host(host);
> > - goto out;
> > -
> > - err_7:
> > - free_irq(host->irq, ashost);
> > - err_6:
> > - release_region(host->io_port, 2048);
> > - err_5:
> > -#ifdef USE_DMAC
> > - release_region(ashost->dma.io_port, 256);
> > -#endif
> > - err_4:
> > - release_region(ashost->card.io_page, 1);
> > - err_3:
> > - release_region(ashost->card.io_intr, 1);
> > - err_2:
> > - release_region(host->io_port + 0x800, 2);
> > - err_1:
> > - scsi_host_put(host);
> > - out:
> > - return ret;
> > -}
> > -
> > -static void __devexit acornscsi_remove(struct expansion_card *ec)
> > -{
> > - struct Scsi_Host *host = ecard_get_drvdata(ec);
> > - AS_Host *ashost = (AS_Host *)host->hostdata;
> > -
> > - ecard_set_drvdata(ec, NULL);
> > - scsi_remove_host(host);
> > -
> > - /*
> > - * Put card into RESET state
> > - */
> > - outb(0x80, ashost->card.io_page);
> > -
> > - free_irq(host->irq, ashost);
> > -
> > - release_region(host->io_port + 0x800, 2);
> > - release_region(ashost->card.io_intr, 1);
> > - release_region(ashost->card.io_page, 1);
> > - release_region(ashost->dma.io_port, 256);
> > - release_region(host->io_port, 2048);
> > -
> > - msgqueue_free(&ashost->scsi.msgs);
> > - queue_free(&ashost->queues.disconnected);
> > - queue_free(&ashost->queues.issue);
> > - scsi_host_put(host);
> > -}
> > -
> > -static const struct ecard_id acornscsi_cids[] = {
> > - { MANU_ACORN, PROD_ACORN_SCSI },
> > - { 0xffff, 0xffff },
> > -};
> > -
> > -static struct ecard_driver acornscsi_driver = {
> > - .probe = acornscsi_probe,
> > - .remove = __devexit_p(acornscsi_remove),
> > - .id_table = acornscsi_cids,
> > - .drv = {
> > - .name = "acornscsi",
> > - },
> > -};
> > -
> > -static int __init acornscsi_init(void)
> > -{
> > - return ecard_register_driver(&acornscsi_driver);
> > -}
> > -
> > -static void __exit acornscsi_exit(void)
> > -{
> > - ecard_remove_driver(&acornscsi_driver);
> > -}
> > -
> > -module_init(acornscsi_init);
> > -module_exit(acornscsi_exit);
> > -
> > -MODULE_AUTHOR("Russell King");
> > -MODULE_DESCRIPTION("AcornSCSI driver");
> > -MODULE_LICENSE("GPL");
> > diff -puN drivers/scsi/arm/acornscsi.h~remove-the-broken-scsi_acornscsi_3-driver /dev/null
> > --- a/drivers/scsi/arm/acornscsi.h
> > +++ /dev/null
> > @@ -1,358 +0,0 @@
> > -/*
> > - * linux/drivers/acorn/scsi/acornscsi.h
> > - *
> > - * Copyright (C) 1997 Russell King
> > - *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - *
> > - * Acorn SCSI driver
> > - */
> > -#ifndef ACORNSCSI_H
> > -#define ACORNSCSI_H
> > -
> > -/* SBIC registers */
> > -#define SBIC_OWNID 0
> > -#define OWNID_FS1 (1<<7)
> > -#define OWNID_FS2 (1<<6)
> > -#define OWNID_EHP (1<<4)
> > -#define OWNID_EAF (1<<3)
> > -
> > -#define SBIC_CTRL 1
> > -#define CTRL_DMAMODE (1<<7)
> > -#define CTRL_DMADBAMODE (1<<6)
> > -#define CTRL_DMABURST (1<<5)
> > -#define CTRL_DMAPOLLED 0
> > -#define CTRL_HHP (1<<4)
> > -#define CTRL_EDI (1<<3)
> > -#define CTRL_IDI (1<<2)
> > -#define CTRL_HA (1<<1)
> > -#define CTRL_HSP (1<<0)
> > -
> > -#define SBIC_TIMEOUT 2
> > -#define SBIC_TOTSECTS 3
> > -#define SBIC_TOTHEADS 4
> > -#define SBIC_TOTCYLH 5
> > -#define SBIC_TOTCYLL 6
> > -#define SBIC_LOGADDRH 7
> > -#define SBIC_LOGADDRM2 8
> > -#define SBIC_LOGADDRM1 9
> > -#define SBIC_LOGADDRL 10
> > -#define SBIC_SECTORNUM 11
> > -#define SBIC_HEADNUM 12
> > -#define SBIC_CYLH 13
> > -#define SBIC_CYLL 14
> > -#define SBIC_TARGETLUN 15
> > -#define TARGETLUN_TLV (1<<7)
> > -#define TARGETLUN_DOK (1<<6)
> > -
> > -#define SBIC_CMNDPHASE 16
> > -#define SBIC_SYNCHTRANSFER 17
> > -#define SYNCHTRANSFER_OF0 0x00
> > -#define SYNCHTRANSFER_OF1 0x01
> > -#define SYNCHTRANSFER_OF2 0x02
> > -#define SYNCHTRANSFER_OF3 0x03
> > -#define SYNCHTRANSFER_OF4 0x04
> > -#define SYNCHTRANSFER_OF5 0x05
> > -#define SYNCHTRANSFER_OF6 0x06
> > -#define SYNCHTRANSFER_OF7 0x07
> > -#define SYNCHTRANSFER_OF8 0x08
> > -#define SYNCHTRANSFER_OF9 0x09
> > -#define SYNCHTRANSFER_OF10 0x0A
> > -#define SYNCHTRANSFER_OF11 0x0B
> > -#define SYNCHTRANSFER_OF12 0x0C
> > -#define SYNCHTRANSFER_8DBA 0x00
> > -#define SYNCHTRANSFER_2DBA 0x20
> > -#define SYNCHTRANSFER_3DBA 0x30
> > -#define SYNCHTRANSFER_4DBA 0x40
> > -#define SYNCHTRANSFER_5DBA 0x50
> > -#define SYNCHTRANSFER_6DBA 0x60
> > -#define SYNCHTRANSFER_7DBA 0x70
> > -
> > -#define SBIC_TRANSCNTH 18
> > -#define SBIC_TRANSCNTM 19
> > -#define SBIC_TRANSCNTL 20
> > -#define SBIC_DESTID 21
> > -#define DESTID_SCC (1<<7)
> > -#define DESTID_DPD (1<<6)
> > -
> > -#define SBIC_SOURCEID 22
> > -#define SOURCEID_ER (1<<7)
> > -#define SOURCEID_ES (1<<6)
> > -#define SOURCEID_DSP (1<<5)
> > -#define SOURCEID_SIV (1<<4)
> > -
> > -#define SBIC_SSR 23
> > -#define SBIC_CMND 24
> > -#define CMND_RESET 0x00
> > -#define CMND_ABORT 0x01
> > -#define CMND_ASSERTATN 0x02
> > -#define CMND_NEGATEACK 0x03
> > -#define CMND_DISCONNECT 0x04
> > -#define CMND_RESELECT 0x05
> > -#define CMND_SELWITHATN 0x06
> > -#define CMND_SELECT 0x07
> > -#define CMND_SELECTATNTRANSFER 0x08
> > -#define CMND_SELECTTRANSFER 0x09
> > -#define CMND_RESELECTRXDATA 0x0A
> > -#define CMND_RESELECTTXDATA 0x0B
> > -#define CMND_WAITFORSELRECV 0x0C
> > -#define CMND_SENDSTATCMD 0x0D
> > -#define CMND_SENDDISCONNECT 0x0E
> > -#define CMND_SETIDI 0x0F
> > -#define CMND_RECEIVECMD 0x10
> > -#define CMND_RECEIVEDTA 0x11
> > -#define CMND_RECEIVEMSG 0x12
> > -#define CMND_RECEIVEUSP 0x13
> > -#define CMND_SENDCMD 0x14
> > -#define CMND_SENDDATA 0x15
> > -#define CMND_SENDMSG 0x16
> > -#define CMND_SENDUSP 0x17
> > -#define CMND_TRANSLATEADDR 0x18
> > -#define CMND_XFERINFO 0x20
> > -#define CMND_SBT (1<<7)
> > -
> > -#define SBIC_DATA 25
> > -#define SBIC_ASR 26
> > -#define ASR_INT (1<<7)
> > -#define ASR_LCI (1<<6)
> > -#define ASR_BSY (1<<5)
> > -#define ASR_CIP (1<<4)
> > -#define ASR_PE (1<<1)
> > -#define ASR_DBR (1<<0)
> > -
> > -/* DMAC registers */
> > -#define DMAC_INIT 0x00
> > -#define INIT_8BIT (1)
> > -
> > -#define DMAC_CHANNEL 0x80
> > -#define CHANNEL_0 0x00
> > -#define CHANNEL_1 0x01
> > -#define CHANNEL_2 0x02
> > -#define CHANNEL_3 0x03
> > -
> > -#define DMAC_TXCNTLO 0x01
> > -#define DMAC_TXCNTHI 0x81
> > -#define DMAC_TXADRLO 0x02
> > -#define DMAC_TXADRMD 0x82
> > -#define DMAC_TXADRHI 0x03
> > -
> > -#define DMAC_DEVCON0 0x04
> > -#define DEVCON0_AKL (1<<7)
> > -#define DEVCON0_RQL (1<<6)
> > -#define DEVCON0_EXW (1<<5)
> > -#define DEVCON0_ROT (1<<4)
> > -#define DEVCON0_CMP (1<<3)
> > -#define DEVCON0_DDMA (1<<2)
> > -#define DEVCON0_AHLD (1<<1)
> > -#define DEVCON0_MTM (1<<0)
> > -
> > -#define DMAC_DEVCON1 0x84
> > -#define DEVCON1_WEV (1<<1)
> > -#define DEVCON1_BHLD (1<<0)
> > -
> > -#define DMAC_MODECON 0x05
> > -#define MODECON_WOED 0x01
> > -#define MODECON_VERIFY 0x00
> > -#define MODECON_READ 0x04
> > -#define MODECON_WRITE 0x08
> > -#define MODECON_AUTOINIT 0x10
> > -#define MODECON_ADDRDIR 0x20
> > -#define MODECON_DEMAND 0x00
> > -#define MODECON_SINGLE 0x40
> > -#define MODECON_BLOCK 0x80
> > -#define MODECON_CASCADE 0xC0
> > -
> > -#define DMAC_STATUS 0x85
> > -#define STATUS_TC0 (1<<0)
> > -#define STATUS_RQ0 (1<<4)
> > -
> > -#define DMAC_TEMPLO 0x06
> > -#define DMAC_TEMPHI 0x86
> > -#define DMAC_REQREG 0x07
> > -#define DMAC_MASKREG 0x87
> > -#define MASKREG_M0 0x01
> > -#define MASKREG_M1 0x02
> > -#define MASKREG_M2 0x04
> > -#define MASKREG_M3 0x08
> > -
> > -/* miscellaneous internal variables */
> > -
> > -#define POD_SPACE(x) ((x) + 0xd0000)
> > -#define MASK_ON (MASKREG_M3|MASKREG_M2|MASKREG_M1|MASKREG_M0)
> > -#define MASK_OFF (MASKREG_M3|MASKREG_M2|MASKREG_M1)
> > -
> > -/*
> > - * SCSI driver phases
> > - */
> > -typedef enum {
> > - PHASE_IDLE, /* we're not planning on doing anything */
> > - PHASE_CONNECTING, /* connecting to a target */
> > - PHASE_CONNECTED, /* connected to a target */
> > - PHASE_MSGOUT, /* message out to device */
> > - PHASE_RECONNECTED, /* reconnected */
> > - PHASE_COMMANDPAUSED, /* command partly sent */
> > - PHASE_COMMAND, /* command all sent */
> > - PHASE_DATAOUT, /* data out to device */
> > - PHASE_DATAIN, /* data in from device */
> > - PHASE_STATUSIN, /* status in from device */
> > - PHASE_MSGIN, /* message in from device */
> > - PHASE_DONE, /* finished */
> > - PHASE_ABORTED, /* aborted */
> > - PHASE_DISCONNECT, /* disconnecting */
> > -} phase_t;
> > -
> > -/*
> > - * After interrupt, what to do now
> > - */
> > -typedef enum {
> > - INTR_IDLE, /* not expecting another IRQ */
> > - INTR_NEXT_COMMAND, /* start next command */
> > - INTR_PROCESSING, /* interrupt routine still processing */
> > -} intr_ret_t;
> > -
> > -/*
> > - * DMA direction
> > - */
> > -typedef enum {
> > - DMA_OUT, /* DMA from memory to chip */
> > - DMA_IN /* DMA from chip to memory */
> > -} dmadir_t;
> > -
> > -/*
> > - * Synchronous transfer state
> > - */
> > -typedef enum { /* Synchronous transfer state */
> > - SYNC_ASYNCHRONOUS, /* don't negociate synchronous transfers*/
> > - SYNC_NEGOCIATE, /* start negociation */
> > - SYNC_SENT_REQUEST, /* sent SDTR message */
> > - SYNC_COMPLETED, /* received SDTR reply */
> > -} syncxfer_t;
> > -
> > -/*
> > - * Command type
> > - */
> > -typedef enum { /* command type */
> > - CMD_READ, /* READ_6, READ_10, READ_12 */
> > - CMD_WRITE, /* WRITE_6, WRITE_10, WRITE_12 */
> > - CMD_MISC, /* Others */
> > -} cmdtype_t;
> > -
> > -/*
> > - * Data phase direction
> > - */
> > -typedef enum { /* Data direction */
> > - DATADIR_IN, /* Data in phase expected */
> > - DATADIR_OUT /* Data out phase expected */
> > -} datadir_t;
> > -
> > -#include "queue.h"
> > -#include "msgqueue.h"
> > -
> > -#define STATUS_BUFFER_SIZE 32
> > -/*
> > - * This is used to dump the previous states of the SBIC
> > - */
> > -struct status_entry {
> > - unsigned long when;
> > - unsigned char ssr;
> > - unsigned char ph;
> > - unsigned char irq;
> > - unsigned char unused;
> > -};
> > -
> > -#define ADD_STATUS(_q,_ssr,_ph,_irq) \
> > -({ \
> > - host->status[(_q)][host->status_ptr[(_q)]].when = jiffies; \
> > - host->status[(_q)][host->status_ptr[(_q)]].ssr = (_ssr); \
> > - host->status[(_q)][host->status_ptr[(_q)]].ph = (_ph); \
> > - host->status[(_q)][host->status_ptr[(_q)]].irq = (_irq); \
> > - host->status_ptr[(_q)] = (host->status_ptr[(_q)] + 1) & (STATUS_BUFFER_SIZE - 1); \
> > -})
> > -
> > -/*
> > - * AcornSCSI host specific data
> > - */
> > -typedef struct acornscsi_hostdata {
> > - /* miscellaneous */
> > - struct Scsi_Host *host; /* host */
> > - struct scsi_cmnd *SCpnt; /* currently processing command */
> > - struct scsi_cmnd *origSCpnt; /* original connecting command */
> > -
> > - /* driver information */
> > - struct {
> > - unsigned int io_port; /* base address of WD33C93 */
> > - unsigned int irq; /* interrupt */
> > - phase_t phase; /* current phase */
> > -
> > - struct {
> > - unsigned char target; /* reconnected target */
> > - unsigned char lun; /* reconnected lun */
> > - unsigned char tag; /* reconnected tag */
> > - } reconnected;
> > -
> > - struct scsi_pointer SCp; /* current commands data pointer */
> > -
> > - MsgQueue_t msgs;
> > -
> > - unsigned short last_message; /* last message to be sent */
> > - unsigned char disconnectable:1; /* this command can be disconnected */
> > - } scsi;
> > -
> > - /* statistics information */
> > - struct {
> > - unsigned int queues;
> > - unsigned int removes;
> > - unsigned int fins;
> > - unsigned int reads;
> > - unsigned int writes;
> > - unsigned int miscs;
> > - unsigned int disconnects;
> > - unsigned int aborts;
> > - unsigned int resets;
> > - } stats;
> > -
> > - /* queue handling */
> > - struct {
> > - Queue_t issue; /* issue queue */
> > - Queue_t disconnected; /* disconnected command queue */
> > - } queues;
> > -
> > - /* per-device info */
> > - struct {
> > - unsigned char sync_xfer; /* synchronous transfer (SBIC value) */
> > - syncxfer_t sync_state; /* sync xfer negociation state */
> > - unsigned char disconnect_ok:1; /* device can disconnect */
> > - } device[8];
> > - unsigned long busyluns[64 / sizeof(unsigned long)];/* array of bits indicating LUNs busy */
> > -
> > - /* DMA info */
> > - struct {
> > - unsigned int io_port; /* base address of DMA controller */
> > - unsigned int io_intr_clear; /* address of DMA interrupt clear */
> > - unsigned int free_addr; /* next free address */
> > - unsigned int start_addr; /* start address of current transfer */
> > - dmadir_t direction; /* dma direction */
> > - unsigned int transferred; /* number of bytes transferred */
> > - unsigned int xfer_start; /* scheduled DMA transfer start */
> > - unsigned int xfer_length; /* scheduled DMA transfer length */
> > - char *xfer_ptr; /* pointer to area */
> > - unsigned char xfer_required:1; /* set if we need to transfer something */
> > - unsigned char xfer_setup:1; /* set if DMA is setup */
> > - unsigned char xfer_done:1; /* set if DMA reached end of BH list */
> > - } dma;
> > -
> > - /* card info */
> > - struct {
> > - unsigned int io_intr; /* base address of interrupt id reg */
> > - unsigned int io_page; /* base address of page reg */
> > - unsigned int io_ram; /* base address of RAM access */
> > - unsigned char page_reg; /* current setting of page reg */
> > - } card;
> > -
> > - unsigned char status_ptr[9];
> > - struct status_entry status[9][STATUS_BUFFER_SIZE];
> > -} AS_Host;
> > -
> > -#endif /* ACORNSCSI_H */
> > _
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> > the body of a message to majordomo@xxxxxxxxxxxxxxx
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
-
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