File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/scsi/arm/Kconfig b/drivers/scsi/arm/Kconfig
new file mode 100644
index 0000000..cfd172a
--- /dev/null
+++ b/drivers/scsi/arm/Kconfig
@@ -0,0 +1,84 @@
+#
+# SCSI driver configuration for Acorn
+#
+config SCSI_ACORNSCSI_3
+ tristate "Acorn SCSI card (aka30) support"
+ depends on ARCH_ACORN && SCSI
+ 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
+ help
+ Around 1991, Arxe Systems Limited released a high density floppy
+ disc interface for the Acorn Archimedes range, to allow the use of
+ HD discs from the then new A5000 on earlier models. This interface
+ was either sold on its own or with an integral SCSI controller.
+ Technical details on this NCR53c94-based device are available at
+ <http://www.cryton.demon.co.uk/acornbits/scsi_arxe.html>
+ Say Y here to compile in support for the SCSI controller.
+
+config SCSI_CUMANA_2
+ tristate "CumanaSCSI II support"
+ depends on ARCH_ACORN && SCSI
+ help
+ This enables support for the Cumana SCSI II card. If you have an
+ Acorn system with one of these, say Y. If unsure, say N.
+
+config SCSI_EESOXSCSI
+ tristate "EESOX support"
+ depends on ARCH_ACORN && SCSI
+ help
+ This enables support for the EESOX SCSI card. If you have an Acorn
+ system with one of these, say Y, otherwise say N.
+
+config SCSI_POWERTECSCSI
+ tristate "PowerTec support"
+ depends on ARCH_ACORN && SCSI
+ help
+ This enables support for the Powertec SCSI card on Acorn systems. If
+ you have one of these, say Y. If unsure, say N.
+
+comment "The following drivers are not fully supported"
+ depends on ARCH_ACORN
+
+config SCSI_CUMANA_1
+ tristate "CumanaSCSI I support"
+ depends on ARCH_ACORN && SCSI
+ select SCSI_SPI_ATTRS
+ help
+ This enables support for the Cumana SCSI I card. If you have an
+ Acorn system with one of these, say Y. If unsure, say N.
+
+config SCSI_OAK1
+ tristate "Oak SCSI support"
+ depends on ARCH_ACORN && SCSI
+ select SCSI_SPI_ATTRS
+ help
+ This enables support for the Oak SCSI card. If you have an Acorn
+ system with one of these, say Y. If unsure, say N.
+
diff --git a/drivers/scsi/arm/Makefile b/drivers/scsi/arm/Makefile
new file mode 100644
index 0000000..16c3e86
--- /dev/null
+++ b/drivers/scsi/arm/Makefile
@@ -0,0 +1,13 @@
+#
+# 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
+obj-$(CONFIG_SCSI_OAK1) += oak.o
+obj-$(CONFIG_SCSI_POWERTECSCSI) += powertec.o fas216.o queue.o msgqueue.o
+obj-$(CONFIG_SCSI_EESOXSCSI) += eesox.o fas216.o queue.o msgqueue.o
diff --git a/drivers/scsi/arm/acornscsi-io.S b/drivers/scsi/arm/acornscsi-io.S
new file mode 100644
index 0000000..22171b2
--- /dev/null
+++ b/drivers/scsi/arm/acornscsi-io.S
@@ -0,0 +1,138 @@
+/*
+ * 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 <mach/hardware.h>
+
+#if defined(__APCS_32__)
+#define LOADREGS(t,r,l...) ldm##t r, l
+#elif defined(__APCS_26__)
+#define LOADREGS(t,r,l...) ldm##t r, l##^
+#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 --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c
new file mode 100644
index 0000000..deaaf84
--- /dev/null
+++ b/drivers/scsi/arm/acornscsi.c
@@ -0,0 +1,3014 @@
+/*
+ * 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 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 explanation 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
+
+#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 <linux/stringify.h>
+#include <linux/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 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
+ */
+
+/* Offsets from MEMC base */
+#define SBIC_REGIDX 0x2000
+#define SBIC_REGVAL 0x2004
+#define DMAC_OFFSET 0x3000
+
+/* Offsets from FAST IOC base */
+#define INT_REG 0x2000
+#define PAGE_REG 0x3000
+
+static inline void sbic_arm_write(AS_Host *host, unsigned int reg, unsigned int value)
+{
+ writeb(reg, host->base + SBIC_REGIDX);
+ writeb(value, host->base + SBIC_REGVAL);
+}
+
+static inline int sbic_arm_read(AS_Host *host, unsigned int reg)
+{
+ if(reg == SBIC_ASR)
+ return readl(host->base + SBIC_REGIDX) & 255;
+ writeb(reg, host->base + SBIC_REGIDX);
+ return readl(host->base + SBIC_REGVAL) & 255;
+}
+
+#define sbic_arm_writenext(host, val) writeb((val), (host)->base + SBIC_REGVAL)
+#define sbic_arm_readnext(host) readb((host)->base + SBIC_REGVAL)
+
+#ifdef USE_DMAC
+#define dmac_read(host,reg) \
+ readb((host)->base + DMAC_OFFSET + ((reg) << 2))
+
+#define dmac_write(host,reg,value) \
+ ({ writeb((value), (host)->base + DMAC_OFFSET + ((reg) << 2)); })
+
+#define dmac_clearintr(host) writeb(0, (host)->fast + INT_REG)
+
+static inline unsigned int dmac_address(AS_Host *host)
+{
+ return dmac_read(host, DMAC_TXADRHI) << 16 |
+ dmac_read(host, DMAC_TXADRMD) << 8 |
+ dmac_read(host, DMAC_TXADRLO);
+}
+
+static
+void acornscsi_dumpdma(AS_Host *host, char *where)
+{
+ unsigned int mode, addr, len;
+
+ mode = dmac_read(host, DMAC_MODECON);
+ addr = dmac_address(host);
+ len = dmac_read(host, DMAC_TXCNTHI) << 8 |
+ dmac_read(host, 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, 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, SBIC_TRANSCNTH) << 16;
+ length |= sbic_arm_readnext(host) << 8;
+ length |= sbic_arm_readnext(host);
+
+ 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, 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, 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;
+ writeb(host->card.page_reg, host->fast + PAGE_REG);
+
+ /* wait 3 cs. SCSI standard says 25ms. */
+ acornscsi_csdelay(3);
+
+ host->card.page_reg = 0;
+ writeb(host->card.page_reg, host->fast + PAGE_REG);
+
+ /*
+ * Should get a reset from the card
+ */
+ timeout = 1000;
+ do {
+ if (readb(host->fast + INT_REG) & 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, SBIC_ASR);
+ sbic_arm_read(host, SBIC_SSR);
+
+ /* setup sbic - WD33C93A */
+ sbic_arm_write(host, SBIC_OWNID, OWNID_EAF | host->host->this_id);
+ sbic_arm_write(host, SBIC_CMND, CMND_RESET);
+
+ /*
+ * Command should cause a reset interrupt
+ */
+ timeout = 1000;
+ do {
+ if (readb(host->fast + INT_REG) & 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, SBIC_ASR);
+ if (sbic_arm_read(host, SBIC_SSR) != 0x01)
+ printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n",
+ host->host->host_no);
+
+ sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
+ sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
+ sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
+ sbic_arm_write(host, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
+
+ host->card.page_reg = 0x40;
+ writeb(host->card.page_reg, host->fast + PAGE_REG);
+
+ /* setup dmac - uPC71071 */
+ dmac_write(host, DMAC_INIT, 0);
+#ifdef USE_DMAC
+ dmac_write(host, DMAC_INIT, INIT_8BIT);
+ dmac_write(host, DMAC_CHANNEL, CHANNEL_0);
+ dmac_write(host, DMAC_DEVCON0, INIT_DEVCON0);
+ dmac_write(host, 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, SBIC_ASR) & (ASR_INT|ASR_BSY|ASR_CIP))) {
+ sbic_arm_write(host, SBIC_DESTID, SCpnt->device->id);
+ sbic_arm_write(host, 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 +
+ (u8)(SCpnt->device->lun & 0x07), 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, 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:
+ scmd_printk(KERN_ERR, SCpnt,
+ "incomplete data transfer detected: "
+ "result=%08X", SCpnt->result);
+ scsi_print_command(SCpnt);
+ acornscsi_dumpdma(host, "done");
+ acornscsi_dumplog(host, SCpnt->device->id);
+ set_host_byte(SCpnt, DID_ERROR);
+ }
+ }
+ }
+
+ 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 +
+ (u8)(SCpnt->device->lun & 0x7), 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(void __iomem *, char *buf, int len);
+ unsigned int page, offset, len = length;
+
+ page = (start_addr >> 12);
+ offset = start_addr & ((1 << 12) - 1);
+
+ writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
+
+ while (len > 0) {
+ unsigned int this_len;
+
+ if (len + offset > (1 << 12))
+ this_len = (1 << 12) - offset;
+ else
+ this_len = len;
+
+ __acornscsi_in(host->base + (offset << 1), ptr, this_len);
+
+ offset += this_len;
+ ptr += this_len;
+ len -= this_len;
+
+ if (offset == (1 << 12)) {
+ offset = 0;
+ page ++;
+ writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
+ }
+ }
+ writeb(host->card.page_reg, host->fast + PAGE_REG);
+}
+
+/*
+ * 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(void __iomem *, char *buf, int len);
+ unsigned int page, offset, len = length;
+
+ page = (start_addr >> 12);
+ offset = start_addr & ((1 << 12) - 1);
+
+ writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
+
+ while (len > 0) {
+ unsigned int this_len;
+
+ if (len + offset > (1 << 12))
+ this_len = (1 << 12) - offset;
+ else
+ this_len = len;
+
+ __acornscsi_out(host->base + (offset << 1), ptr, this_len);
+
+ offset += this_len;
+ ptr += this_len;
+ len -= this_len;
+
+ if (offset == (1 << 12)) {
+ offset = 0;
+ page ++;
+ writeb((page & 0x3f) | host->card.page_reg, host->fast + PAGE_REG);
+ }
+ }
+ writeb(host->card.page_reg, host->fast + PAGE_REG);
+}
+
+/* =========================================================================================
+ * 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, DMAC_MASKREG, MASK_ON);
+ dmac_clearintr(host);
+
+#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, 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, DMAC_TXCNTLO, length);
+ dmac_write(host, DMAC_TXCNTHI, length >> 8);
+ dmac_write(host, DMAC_TXADRLO, address);
+ dmac_write(host, DMAC_TXADRMD, address >> 8);
+ dmac_write(host, DMAC_TXADRHI, 0);
+ dmac_write(host, DMAC_MODECON, mode);
+ dmac_write(host, 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, DMAC_MASKREG, MASK_ON);
+ dmac_clearintr(host);
+
+ /*
+ * 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) - 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, DMAC_MASKREG, MASK_ON);
+ dmac_clearintr(host);
+
+ /*
+ * Calculate amount transferred via DMA
+ */
+ transferred = dmac_address(host) - 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, DMAC_TXCNTLO, length);
+ dmac_write(host, DMAC_TXCNTHI, length >> 8);
+ dmac_write(host, DMAC_TXADRLO, address);
+ dmac_write(host, DMAC_TXADRMD, address >> 8);
+ dmac_write(host, DMAC_TXADRHI, 0);
+ dmac_write(host, 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, DMAC_STATUS) & STATUS_RQ0) {
+ acornscsi_abortcmd(host, host->SCpnt->tag);
+
+ dmac_write(host, DMAC_TXCNTLO, 0);
+ dmac_write(host, DMAC_TXCNTHI, 0);
+ dmac_write(host, DMAC_TXADRLO, 0);
+ dmac_write(host, DMAC_TXADRMD, 0);
+ dmac_write(host, DMAC_TXADRHI, 0);
+ dmac_write(host, 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, DMAC_TXADRLO, transferred);
+ dmac_write(host, DMAC_TXADRMD, transferred >> 8);
+ dmac_write(host, 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, SBIC_ASR);
+
+ if (asr & ASR_DBR) {
+ timeout = max_timeout;
+
+ sbic_arm_write(host, 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, SBIC_TRANSCNTH, 0);
+ sbic_arm_writenext(host, 0);
+ sbic_arm_writenext(host, 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, 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, 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, SBIC_TRANSCNTH, 0);
+ sbic_arm_writenext(host, 0);
+ sbic_arm_writenext(host, 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, 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, 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, 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, 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 negotiation 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 +
+ (u8)(host->SCpnt->device->lun & 0x7), 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, 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, 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;
+
+ 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 = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred;
+
+ sbic_arm_write(host, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
+ sbic_arm_writenext(host, residual >> 16);
+ sbic_arm_writenext(host, residual >> 8);
+ sbic_arm_writenext(host, 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, 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, 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, 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, SBIC_ASR);
+ if (!(asr & ASR_INT))
+ return INTR_IDLE;
+
+ ssr = sbic_arm_read(host, 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, SBIC_OWNID, OWNID_EAF | host->host->this_id);
+ sbic_arm_write(host, SBIC_CMND, CMND_RESET);
+ return INTR_IDLE;
+
+ case 0x01: /* reset state - advanced */
+ sbic_arm_write(host, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
+ sbic_arm_write(host, SBIC_TIMEOUT, TIMEOUT_TIME);
+ sbic_arm_write(host, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
+ sbic_arm_write(host, 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, SBIC_ASR);
+ if (!(asr & ASR_INT))
+ break;
+ ssr = sbic_arm_read(host, 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 = scsi_bufflen(host->SCpnt) -
+ 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 = scsi_bufflen(host->SCpnt) -
+ 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 = scsi_bufflen(host->SCpnt) -
+ 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 = scsi_bufflen(host->SCpnt) -
+ 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 = scsi_bufflen(host->SCpnt) -
+ 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 = scsi_bufflen(host->SCpnt) -
+ 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 = readb(host->fast + INT_REG);
+
+ if (iostatus & 2) {
+ acornscsi_dma_intr(host);
+ iostatus = readb(host->fast + INT_REG);
+ }
+
+ 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.
+ */
+static int acornscsi_queuecmd_lck(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;
+}
+
+DEF_SCSI_QCMD(acornscsi_queuecmd)
+
+/*
+ * 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, 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, SBIC_ASR);
+ ssr = sbic_arm_read(host, 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 +
+ (u8)(SCpnt->device->lun & 0x7), 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
+ result = 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 = FAILED;
+ 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);
+ result = FAILED;
+//#if (DEBUG & DEBUG_ABORT)
+ printk("not running\n");
+//#endif
+ break;
+ }
+
+ return result;
+}
+
+/*
+ * Prototype: int acornscsi_reset(struct scsi_cmnd *SCpnt)
+ * Purpose : reset a command on this host/reset this host
+ * Params : SCpnt - command causing reset
+ * Returns : one of SCSI_RESET_ macros
+ */
+int acornscsi_bus_reset(struct scsi_cmnd *SCpnt)
+{
+ 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, SBIC_ASR);
+ ssr = sbic_arm_read(host, 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);
+
+ /*
+ * do hard reset. This resets all devices on this host, and so we
+ * must set the reset status on all commands.
+ */
+ acornscsi_resetcard(host);
+
+ while ((SCptr = queue_remove(&host->queues.disconnected)) != NULL)
+ ;
+
+ return 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
+#if (DEBUG & DEBUG_NO_WRITE)
+ " NOWRITE (" __stringify(NO_WRITE) ")"
+#endif
+ , host->hostt->name, host->io_port, host->irq,
+ VER_MAJOR, VER_MINOR, VER_PATCH);
+ return string;
+}
+
+static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance)
+{
+ int devidx;
+ struct scsi_device *scd;
+ AS_Host *host;
+
+ host = (AS_Host *)instance->hostdata;
+
+ seq_printf(m, "AcornSCSI driver v%d.%d.%d"
+#ifdef CONFIG_SCSI_ACORNSCSI_SYNC
+ " SYNC"
+#endif
+#ifdef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
+ " TAG"
+#endif
+#if (DEBUG & DEBUG_NO_WRITE)
+ " NOWRITE (" __stringify(NO_WRITE) ")"
+#endif
+ "\n\n", VER_MAJOR, VER_MINOR, VER_PATCH);
+
+ seq_printf(m, "SBIC: WD33C93A Address: %p IRQ : %d\n",
+ host->base + SBIC_REGIDX, host->scsi.irq);
+#ifdef USE_DMAC
+ seq_printf(m, "DMAC: uPC71071 Address: %p IRQ : %d\n\n",
+ host->base + DMAC_OFFSET, host->scsi.irq);
+#endif
+
+ seq_printf(m, "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;
+
+ seq_printf(m, "\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) {
+ seq_printf(m, "%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;
+ }
+ }
+ }
+
+ seq_printf(m, "\nAttached devices:\n");
+
+ shost_for_each_device(scd, instance) {
+ seq_printf(m, "Device/Lun TaggedQ Sync\n");
+ seq_printf(m, " %d/%llu ", scd->id, scd->lun);
+ if (scd->tagged_supported)
+ seq_printf(m, "%3sabled(%3d) ",
+ scd->simple_tags ? "en" : "dis",
+ scd->current_tag);
+ else
+ seq_printf(m, "unsupported ");
+
+ if (host->device[scd->id].sync_xfer & 15)
+ seq_printf(m, "offset %d, %d ns\n",
+ host->device[scd->id].sync_xfer & 15,
+ acornscsi_getperiod(host->device[scd->id].sync_xfer));
+ else
+ seq_printf(m, "async\n");
+
+ }
+ return 0;
+}
+
+static struct scsi_host_template acornscsi_template = {
+ .module = THIS_MODULE,
+ .show_info = acornscsi_show_info,
+ .name = "AcornSCSI",
+ .info = acornscsi_info,
+ .queuecommand = acornscsi_queuecmd,
+ .eh_abort_handler = acornscsi_abort,
+ .eh_bus_reset_handler = acornscsi_bus_reset,
+ .can_queue = 16,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 2,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "acornscsi",
+};
+
+static int acornscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ AS_Host *ashost;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ host = scsi_host_alloc(&acornscsi_template, sizeof(AS_Host));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_release;
+ }
+
+ ashost = (AS_Host *)host->hostdata;
+
+ ashost->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+ ashost->fast = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+ if (!ashost->base || !ashost->fast)
+ goto out_put;
+
+ host->irq = ec->irq;
+ ashost->host = host;
+ ashost->scsi.irq = host->irq;
+
+ ec->irqaddr = ashost->fast + INT_REG;
+ ec->irqmask = 0x0a;
+
+ ret = request_irq(host->irq, acornscsi_intr, 0, "acornscsi", ashost);
+ if (ret) {
+ printk(KERN_CRIT "scsi%d: IRQ%d not free: %d\n",
+ host->host_no, ashost->scsi.irq, ret);
+ goto out_put;
+ }
+
+ 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 out_irq;
+
+ scsi_scan_host(host);
+ goto out;
+
+ out_irq:
+ free_irq(host->irq, ashost);
+ msgqueue_free(&ashost->scsi.msgs);
+ queue_free(&ashost->queues.disconnected);
+ queue_free(&ashost->queues.issue);
+ out_put:
+ ecardm_iounmap(ec, ashost->fast);
+ ecardm_iounmap(ec, ashost->base);
+ scsi_host_put(host);
+ out_release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void 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
+ */
+ writeb(0x80, ashost->fast + PAGE_REG);
+
+ free_irq(host->irq, ashost);
+
+ msgqueue_free(&ashost->scsi.msgs);
+ queue_free(&ashost->queues.disconnected);
+ queue_free(&ashost->queues.issue);
+ ecardm_iounmap(ec, ashost->fast);
+ ecardm_iounmap(ec, ashost->base);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id acornscsi_cids[] = {
+ { MANU_ACORN, PROD_ACORN_SCSI },
+ { 0xffff, 0xffff },
+};
+
+static struct ecard_driver acornscsi_driver = {
+ .probe = acornscsi_probe,
+ .remove = 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 --git a/drivers/scsi/arm/acornscsi.h b/drivers/scsi/arm/acornscsi.h
new file mode 100644
index 0000000..01bc715
--- /dev/null
+++ b/drivers/scsi/arm/acornscsi.h
@@ -0,0 +1,353 @@
+/*
+ * 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 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 negotiate synchronous transfers*/
+ SYNC_NEGOCIATE, /* start negotiation */
+ 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 */
+ void __iomem *base; /* memc base address */
+ void __iomem *fast; /* fast ioc base address */
+
+ /* driver information */
+ struct {
+ 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 negotiation 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 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 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 */
diff --git a/drivers/scsi/arm/arxescsi.c b/drivers/scsi/arm/arxescsi.c
new file mode 100644
index 0000000..3110736
--- /dev/null
+++ b/drivers/scsi/arm/arxescsi.c
@@ -0,0 +1,357 @@
+/*
+ * linux/drivers/scsi/arm/arxescsi.c
+ *
+ * Copyright (C) 1997-2000 Russell King, Stefan Hanske
+ *
+ * This driver is based on experimentation. Hence, it may have made
+ * assumptions about the particular card that I have available, and
+ * may not be reliable!
+ *
+ * Changelog:
+ * 30-08-1997 RMK 0.0.0 Created, READONLY version as cumana_2.c
+ * 22-01-1998 RMK 0.0.1 Updated to 2.1.80
+ * 15-04-1998 RMK 0.0.1 Only do PIO if FAS216 will allow it.
+ * 11-06-1998 SH 0.0.2 Changed to support ARXE 16-bit SCSI card
+ * enabled writing
+ * 01-01-2000 SH 0.1.0 Added *real* pseudo dma writing
+ * (arxescsi_pseudo_dma_write)
+ * 02-04-2000 RMK 0.1.1 Updated for new error handling code.
+ * 22-10-2000 SH Updated for new registering scheme.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/unistd.h>
+#include <linux/stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/ecard.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+
+struct arxescsi_info {
+ FAS216_Info info;
+ struct expansion_card *ec;
+ void __iomem *base;
+};
+
+#define DMADATA_OFFSET (0x200)
+
+#define DMASTAT_OFFSET (0x600)
+#define DMASTAT_DRQ (1 << 0)
+
+#define CSTATUS_IRQ (1 << 0)
+
+#define VERSION "1.10 (23/01/2003 2.5.57)"
+
+/*
+ * Function: int arxescsi_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose : initialises DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * min_type - minimum DMA support that we must have for this transfer
+ * Returns : 0 if we should not set CMD_WITHDMA for transfer info command
+ */
+static fasdmatype_t
+arxescsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, fasdmatype_t min_type)
+{
+ /*
+ * We don't do real DMA
+ */
+ return fasdma_pseudo;
+}
+
+static void arxescsi_pseudo_dma_write(unsigned char *addr, void __iomem *base)
+{
+ __asm__ __volatile__(
+ " stmdb sp!, {r0-r12}\n"
+ " mov r3, %0\n"
+ " mov r1, %1\n"
+ " add r2, r1, #512\n"
+ " mov r4, #256\n"
+ ".loop_1: ldmia r3!, {r6, r8, r10, r12}\n"
+ " mov r5, r6, lsl #16\n"
+ " mov r7, r8, lsl #16\n"
+ ".loop_2: ldrb r0, [r1, #1536]\n"
+ " tst r0, #1\n"
+ " beq .loop_2\n"
+ " stmia r2, {r5-r8}\n\t"
+ " mov r9, r10, lsl #16\n"
+ " mov r11, r12, lsl #16\n"
+ ".loop_3: ldrb r0, [r1, #1536]\n"
+ " tst r0, #1\n"
+ " beq .loop_3\n"
+ " stmia r2, {r9-r12}\n"
+ " subs r4, r4, #16\n"
+ " bne .loop_1\n"
+ " ldmia sp!, {r0-r12}\n"
+ :
+ : "r" (addr), "r" (base));
+}
+
+/*
+ * Function: int arxescsi_dma_pseudo(host, SCpnt, direction, transfer)
+ * Purpose : handles pseudo DMA
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * transfer - minimum number of bytes we expect to transfer
+ */
+static void
+arxescsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, int transfer)
+{
+ struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
+ unsigned int length, error = 0;
+ void __iomem *base = info->info.scsi.io_base;
+ unsigned char *addr;
+
+ length = SCp->this_residual;
+ addr = SCp->ptr;
+
+ if (direction == DMA_OUT) {
+ unsigned int word;
+ while (length > 256) {
+ if (readb(base + 0x80) & STAT_INT) {
+ error = 1;
+ break;
+ }
+ arxescsi_pseudo_dma_write(addr, base);
+ addr += 256;
+ length -= 256;
+ }
+
+ if (!error)
+ while (length > 0) {
+ if (readb(base + 0x80) & STAT_INT)
+ break;
+
+ if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+ continue;
+
+ word = *addr | *(addr + 1) << 8;
+
+ writew(word, base + DMADATA_OFFSET);
+ if (length > 1) {
+ addr += 2;
+ length -= 2;
+ } else {
+ addr += 1;
+ length -= 1;
+ }
+ }
+ }
+ else {
+ if (transfer && (transfer & 255)) {
+ while (length >= 256) {
+ if (readb(base + 0x80) & STAT_INT) {
+ error = 1;
+ break;
+ }
+
+ if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+ continue;
+
+ readsw(base + DMADATA_OFFSET, addr, 256 >> 1);
+ addr += 256;
+ length -= 256;
+ }
+ }
+
+ if (!(error))
+ while (length > 0) {
+ unsigned long word;
+
+ if (readb(base + 0x80) & STAT_INT)
+ break;
+
+ if (!(readb(base + DMASTAT_OFFSET) & DMASTAT_DRQ))
+ continue;
+
+ word = readw(base + DMADATA_OFFSET);
+ *addr++ = word;
+ if (--length > 0) {
+ *addr++ = word >> 8;
+ length --;
+ }
+ }
+ }
+}
+
+/*
+ * Function: int arxescsi_dma_stop(host, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ */
+static void arxescsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
+{
+ /*
+ * no DMA to stop
+ */
+}
+
+/*
+ * Function: const char *arxescsi_info(struct Scsi_Host * host)
+ * Purpose : returns a descriptive string about this interface,
+ * Params : host - driver host structure to return info for.
+ * Returns : pointer to a static buffer containing null terminated string.
+ */
+static const char *arxescsi_info(struct Scsi_Host *host)
+{
+ struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;
+ static char string[150];
+
+ sprintf(string, "%s (%s) in slot %d v%s",
+ host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+ VERSION);
+
+ return string;
+}
+
+static int
+arxescsi_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+ struct arxescsi_info *info;
+ info = (struct arxescsi_info *)host->hostdata;
+
+ seq_printf(m, "ARXE 16-bit SCSI driver v%s\n", VERSION);
+ fas216_print_host(&info->info, m);
+ fas216_print_stats(&info->info, m);
+ fas216_print_devices(&info->info, m);
+ return 0;
+}
+
+static struct scsi_host_template arxescsi_template = {
+ .show_info = arxescsi_show_info,
+ .name = "ARXE SCSI card",
+ .info = arxescsi_info,
+ .queuecommand = fas216_noqueue_command,
+ .eh_host_reset_handler = fas216_eh_host_reset,
+ .eh_bus_reset_handler = fas216_eh_bus_reset,
+ .eh_device_reset_handler = fas216_eh_device_reset,
+ .eh_abort_handler = fas216_eh_abort,
+ .can_queue = 0,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "arxescsi",
+};
+
+static int arxescsi_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ struct arxescsi_info *info;
+ void __iomem *base;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+ if (!base) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ host = scsi_host_alloc(&arxescsi_template, sizeof(struct arxescsi_info));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ info = (struct arxescsi_info *)host->hostdata;
+ info->ec = ec;
+ info->base = base;
+
+ info->info.scsi.io_base = base + 0x2000;
+ info->info.scsi.irq = 0;
+ info->info.scsi.dma = NO_DMA;
+ info->info.scsi.io_shift = 5;
+ info->info.ifcfg.clockrate = 24; /* MHz */
+ info->info.ifcfg.select_timeout = 255;
+ info->info.ifcfg.asyncperiod = 200; /* ns */
+ info->info.ifcfg.sync_max_depth = 0;
+ info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK;
+ info->info.ifcfg.disconnect_ok = 0;
+ info->info.ifcfg.wide_max_size = 0;
+ info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
+ info->info.dma.setup = arxescsi_dma_setup;
+ info->info.dma.pseudo = arxescsi_dma_pseudo;
+ info->info.dma.stop = arxescsi_dma_stop;
+
+ ec->irqaddr = base;
+ ec->irqmask = CSTATUS_IRQ;
+
+ ret = fas216_init(host);
+ if (ret)
+ goto out_unregister;
+
+ ret = fas216_add(host, &ec->dev);
+ if (ret == 0)
+ goto out;
+
+ fas216_release(host);
+ out_unregister:
+ scsi_host_put(host);
+ out_region:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void arxescsi_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+ fas216_remove(host);
+
+ fas216_release(host);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id arxescsi_cids[] = {
+ { MANU_ARXE, PROD_ARXE_SCSI },
+ { 0xffff, 0xffff },
+};
+
+static struct ecard_driver arxescsi_driver = {
+ .probe = arxescsi_probe,
+ .remove = arxescsi_remove,
+ .id_table = arxescsi_cids,
+ .drv = {
+ .name = "arxescsi",
+ },
+};
+
+static int __init init_arxe_scsi_driver(void)
+{
+ return ecard_register_driver(&arxescsi_driver);
+}
+
+static void __exit exit_arxe_scsi_driver(void)
+{
+ ecard_remove_driver(&arxescsi_driver);
+}
+
+module_init(init_arxe_scsi_driver);
+module_exit(exit_arxe_scsi_driver);
+
+MODULE_AUTHOR("Stefan Hanske");
+MODULE_DESCRIPTION("ARXESCSI driver for Acorn machines");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/scsi/arm/cumana_1.c b/drivers/scsi/arm/cumana_1.c
new file mode 100644
index 0000000..d28d6c0
--- /dev/null
+++ b/drivers/scsi/arm/cumana_1.c
@@ -0,0 +1,324 @@
+/*
+ * Generic Generic NCR5380 driver
+ *
+ * Copyright 1995-2002, Russell King
+ */
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+#include <scsi/scsi_host.h>
+
+#include <scsi/scsicam.h>
+
+#define PSEUDO_DMA
+
+#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
+#define NCR5380_local_declare() struct Scsi_Host *_instance
+#define NCR5380_setup(instance) _instance = instance
+#define NCR5380_read(reg) cumanascsi_read(_instance, reg)
+#define NCR5380_write(reg, value) cumanascsi_write(_instance, reg, value)
+#define NCR5380_intr cumanascsi_intr
+#define NCR5380_queue_command cumanascsi_queue_command
+#define NCR5380_info cumanascsi_info
+
+#define NCR5380_implementation_fields \
+ unsigned ctrl; \
+ void __iomem *base; \
+ void __iomem *dma
+
+#include "../NCR5380.h"
+
+void cumanascsi_setup(char *str, int *ints)
+{
+}
+
+#define CTRL 0x16fc
+#define STAT 0x2004
+#define L(v) (((v)<<16)|((v) & 0x0000ffff))
+#define H(v) (((v)>>16)|((v) & 0xffff0000))
+
+static inline int
+NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, int len)
+{
+ unsigned long *laddr;
+ void __iomem *dma = priv(host)->dma + 0x2000;
+
+ if(!len) return 0;
+
+ writeb(0x02, priv(host)->base + CTRL);
+ laddr = (unsigned long *)addr;
+ while(len >= 32)
+ {
+ unsigned int status;
+ unsigned long v;
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(!(status & 0x40))
+ continue;
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ v=*laddr++; writew(L(v), dma); writew(H(v), dma);
+ len -= 32;
+ if(len == 0)
+ break;
+ }
+
+ addr = (unsigned char *)laddr;
+ writeb(0x12, priv(host)->base + CTRL);
+
+ while(len > 0)
+ {
+ unsigned int status;
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ writeb(*addr++, dma);
+ if(--len == 0)
+ break;
+ }
+
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ writeb(*addr++, dma);
+ if(--len == 0)
+ break;
+ }
+ }
+end:
+ writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
+ return len;
+}
+
+static inline int
+NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, int len)
+{
+ unsigned long *laddr;
+ void __iomem *dma = priv(host)->dma + 0x2000;
+
+ if(!len) return 0;
+
+ writeb(0x00, priv(host)->base + CTRL);
+ laddr = (unsigned long *)addr;
+ while(len >= 32)
+ {
+ unsigned int status;
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(!(status & 0x40))
+ continue;
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ *laddr++ = readw(dma) | (readw(dma) << 16);
+ len -= 32;
+ if(len == 0)
+ break;
+ }
+
+ addr = (unsigned char *)laddr;
+ writeb(0x10, priv(host)->base + CTRL);
+
+ while(len > 0)
+ {
+ unsigned int status;
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ *addr++ = readb(dma);
+ if(--len == 0)
+ break;
+ }
+
+ status = readb(priv(host)->base + STAT);
+ if(status & 0x80)
+ goto end;
+ if(status & 0x40)
+ {
+ *addr++ = readb(dma);
+ if(--len == 0)
+ break;
+ }
+ }
+end:
+ writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
+ return len;
+}
+
+static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
+{
+ void __iomem *base = priv(host)->base;
+ unsigned char val;
+
+ writeb(0, base + CTRL);
+
+ val = readb(base + 0x2100 + (reg << 2));
+
+ priv(host)->ctrl = 0x40;
+ writeb(0x40, base + CTRL);
+
+ return val;
+}
+
+static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
+{
+ void __iomem *base = priv(host)->base;
+
+ writeb(0, base + CTRL);
+
+ writeb(value, base + 0x2100 + (reg << 2));
+
+ priv(host)->ctrl = 0x40;
+ writeb(0x40, base + CTRL);
+}
+
+#include "../NCR5380.c"
+
+static struct scsi_host_template cumanascsi_template = {
+ .module = THIS_MODULE,
+ .name = "Cumana 16-bit SCSI",
+ .info = cumanascsi_info,
+ .queuecommand = cumanascsi_queue_command,
+ .eh_abort_handler = NCR5380_abort,
+ .eh_bus_reset_handler = NCR5380_bus_reset,
+ .can_queue = 16,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 2,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "CumanaSCSI-1",
+};
+
+static int cumanascsi1_probe(struct expansion_card *ec,
+ const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_release;
+ }
+
+ priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
+ ecard_resource_len(ec, ECARD_RES_IOCSLOW));
+ priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
+ ecard_resource_len(ec, ECARD_RES_MEMC));
+ if (!priv(host)->base || !priv(host)->dma) {
+ ret = -ENOMEM;
+ goto out_unmap;
+ }
+
+ host->irq = ec->irq;
+
+ NCR5380_init(host, 0);
+
+ priv(host)->ctrl = 0;
+ writeb(0, priv(host)->base + CTRL);
+
+ host->n_io_port = 255;
+ if (!(request_region(host->io_port, host->n_io_port, "CumanaSCSI-1"))) {
+ ret = -EBUSY;
+ goto out_unmap;
+ }
+
+ ret = request_irq(host->irq, cumanascsi_intr, 0,
+ "CumanaSCSI-1", host);
+ if (ret) {
+ printk("scsi%d: IRQ%d not free: %d\n",
+ host->host_no, host->irq, ret);
+ goto out_unmap;
+ }
+
+ ret = scsi_add_host(host, &ec->dev);
+ if (ret)
+ goto out_free_irq;
+
+ scsi_scan_host(host);
+ goto out;
+
+ out_free_irq:
+ free_irq(host->irq, host);
+ out_unmap:
+ iounmap(priv(host)->base);
+ iounmap(priv(host)->dma);
+ scsi_host_put(host);
+ out_release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void cumanascsi1_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+
+ scsi_remove_host(host);
+ free_irq(host->irq, host);
+ NCR5380_exit(host);
+ iounmap(priv(host)->base);
+ iounmap(priv(host)->dma);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id cumanascsi1_cids[] = {
+ { MANU_CUMANA, PROD_CUMANA_SCSI_1 },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver cumanascsi1_driver = {
+ .probe = cumanascsi1_probe,
+ .remove = cumanascsi1_remove,
+ .id_table = cumanascsi1_cids,
+ .drv = {
+ .name = "cumanascsi1",
+ },
+};
+
+static int __init cumanascsi_init(void)
+{
+ return ecard_register_driver(&cumanascsi1_driver);
+}
+
+static void __exit cumanascsi_exit(void)
+{
+ ecard_remove_driver(&cumanascsi1_driver);
+}
+
+module_init(cumanascsi_init);
+module_exit(cumanascsi_exit);
+
+MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c
new file mode 100644
index 0000000..faa1bee
--- /dev/null
+++ b/drivers/scsi/arm/cumana_2.c
@@ -0,0 +1,520 @@
+/*
+ * linux/drivers/acorn/scsi/cumana_2.c
+ *
+ * Copyright (C) 1997-2005 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.
+ *
+ * Changelog:
+ * 30-08-1997 RMK 0.0.0 Created, READONLY version.
+ * 22-01-1998 RMK 0.0.1 Updated to 2.1.80.
+ * 15-04-1998 RMK 0.0.1 Only do PIO if FAS216 will allow it.
+ * 02-05-1998 RMK 0.0.2 Updated & added DMA support.
+ * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
+ * 18-08-1998 RMK 0.0.3 Fixed synchronous transfer depth.
+ * 02-04-2000 RMK 0.0.4 Updated for new error handling code.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+#include "scsi.h"
+
+#include <scsi/scsicam.h>
+
+#define CUMANASCSI2_STATUS (0x0000)
+#define STATUS_INT (1 << 0)
+#define STATUS_DRQ (1 << 1)
+#define STATUS_LATCHED (1 << 3)
+
+#define CUMANASCSI2_ALATCH (0x0014)
+#define ALATCH_ENA_INT (3)
+#define ALATCH_DIS_INT (2)
+#define ALATCH_ENA_TERM (5)
+#define ALATCH_DIS_TERM (4)
+#define ALATCH_ENA_BIT32 (11)
+#define ALATCH_DIS_BIT32 (10)
+#define ALATCH_ENA_DMA (13)
+#define ALATCH_DIS_DMA (12)
+#define ALATCH_DMA_OUT (15)
+#define ALATCH_DMA_IN (14)
+
+#define CUMANASCSI2_PSEUDODMA (0x0200)
+
+#define CUMANASCSI2_FAS216_OFFSET (0x0300)
+#define CUMANASCSI2_FAS216_SHIFT 2
+
+/*
+ * Version
+ */
+#define VERSION "1.00 (13/11/2002 2.5.47)"
+
+/*
+ * Use term=0,1,0,0,0 to turn terminators on/off
+ */
+static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
+
+#define NR_SG 256
+
+struct cumanascsi2_info {
+ FAS216_Info info;
+ struct expansion_card *ec;
+ void __iomem *base;
+ unsigned int terms; /* Terminator state */
+ struct scatterlist sg[NR_SG]; /* Scatter DMA list */
+};
+
+#define CSTATUS_IRQ (1 << 0)
+#define CSTATUS_DRQ (1 << 1)
+
+/* Prototype: void cumanascsi_2_irqenable(ec, irqnr)
+ * Purpose : Enable interrupts on Cumana SCSI 2 card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr)
+{
+ struct cumanascsi2_info *info = ec->irq_data;
+ writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH);
+}
+
+/* Prototype: void cumanascsi_2_irqdisable(ec, irqnr)
+ * Purpose : Disable interrupts on Cumana SCSI 2 card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr)
+{
+ struct cumanascsi2_info *info = ec->irq_data;
+ writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH);
+}
+
+static const expansioncard_ops_t cumanascsi_2_ops = {
+ .irqenable = cumanascsi_2_irqenable,
+ .irqdisable = cumanascsi_2_irqdisable,
+};
+
+/* Prototype: void cumanascsi_2_terminator_ctl(host, on_off)
+ * Purpose : Turn the Cumana SCSI 2 terminators on or off
+ * Params : host - card to turn on/off
+ * : on_off - !0 to turn on, 0 to turn off
+ */
+static void
+cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off)
+{
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+
+ if (on_off) {
+ info->terms = 1;
+ writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH);
+ } else {
+ info->terms = 0;
+ writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH);
+ }
+}
+
+/* Prototype: void cumanascsi_2_intr(irq, *dev_id, *regs)
+ * Purpose : handle interrupts from Cumana SCSI 2 card
+ * Params : irq - interrupt number
+ * dev_id - user-defined (Scsi_Host structure)
+ */
+static irqreturn_t
+cumanascsi_2_intr(int irq, void *dev_id)
+{
+ struct cumanascsi2_info *info = dev_id;
+
+ return fas216_intr(&info->info);
+}
+
+/* Prototype: fasdmatype_t cumanascsi_2_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose : initialises DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * min_type - minimum DMA support that we must have for this transfer
+ * Returns : type of transfer to be performed
+ */
+static fasdmatype_t
+cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, fasdmatype_t min_type)
+{
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+ struct device *dev = scsi_get_device(host);
+ int dmach = info->info.scsi.dma;
+
+ writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
+
+ if (dmach != NO_DMA &&
+ (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
+ int bufs, map_dir, dma_dir, alatch_dir;
+
+ bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
+
+ if (direction == DMA_OUT)
+ map_dir = DMA_TO_DEVICE,
+ dma_dir = DMA_MODE_WRITE,
+ alatch_dir = ALATCH_DMA_OUT;
+ else
+ map_dir = DMA_FROM_DEVICE,
+ dma_dir = DMA_MODE_READ,
+ alatch_dir = ALATCH_DMA_IN;
+
+ dma_map_sg(dev, info->sg, bufs, map_dir);
+
+ disable_dma(dmach);
+ set_dma_sg(dmach, info->sg, bufs);
+ writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
+ set_dma_mode(dmach, dma_dir);
+ enable_dma(dmach);
+ writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH);
+ writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH);
+ return fasdma_real_all;
+ }
+
+ /*
+ * If we're not doing DMA,
+ * we'll do pseudo DMA
+ */
+ return fasdma_pio;
+}
+
+/*
+ * Prototype: void cumanascsi_2_dma_pseudo(host, SCpnt, direction, transfer)
+ * Purpose : handles pseudo DMA
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * transfer - minimum number of bytes we expect to transfer
+ */
+static void
+cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, int transfer)
+{
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+ unsigned int length;
+ unsigned char *addr;
+
+ length = SCp->this_residual;
+ addr = SCp->ptr;
+
+ if (direction == DMA_OUT)
+#if 0
+ while (length > 1) {
+ unsigned long word;
+ unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+ if (status & STATUS_INT)
+ goto end;
+
+ if (!(status & STATUS_DRQ))
+ continue;
+
+ word = *addr | *(addr + 1) << 8;
+ writew(word, info->base + CUMANASCSI2_PSEUDODMA);
+ addr += 2;
+ length -= 2;
+ }
+#else
+ printk ("PSEUDO_OUT???\n");
+#endif
+ else {
+ if (transfer && (transfer & 255)) {
+ while (length >= 256) {
+ unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+ if (status & STATUS_INT)
+ return;
+
+ if (!(status & STATUS_DRQ))
+ continue;
+
+ readsw(info->base + CUMANASCSI2_PSEUDODMA,
+ addr, 256 >> 1);
+ addr += 256;
+ length -= 256;
+ }
+ }
+
+ while (length > 0) {
+ unsigned long word;
+ unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+ if (status & STATUS_INT)
+ return;
+
+ if (!(status & STATUS_DRQ))
+ continue;
+
+ word = readw(info->base + CUMANASCSI2_PSEUDODMA);
+ *addr++ = word;
+ if (--length > 0) {
+ *addr++ = word >> 8;
+ length --;
+ }
+ }
+ }
+}
+
+/* Prototype: int cumanascsi_2_dma_stop(host, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ */
+static void
+cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
+{
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+ if (info->info.scsi.dma != NO_DMA) {
+ writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
+ disable_dma(info->info.scsi.dma);
+ }
+}
+
+/* Prototype: const char *cumanascsi_2_info(struct Scsi_Host * host)
+ * Purpose : returns a descriptive string about this interface,
+ * Params : host - driver host structure to return info for.
+ * Returns : pointer to a static buffer containing null terminated string.
+ */
+const char *cumanascsi_2_info(struct Scsi_Host *host)
+{
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+ static char string[150];
+
+ sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
+ host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+ VERSION, info->terms ? "n" : "ff");
+
+ return string;
+}
+
+/* Prototype: int cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+ * Purpose : Set a driver specific function
+ * Params : host - host to setup
+ * : buffer - buffer containing string describing operation
+ * : length - length of string
+ * Returns : -EINVAL, or 0
+ */
+static int
+cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+{
+ int ret = length;
+
+ if (length >= 11 && strncmp(buffer, "CUMANASCSI2", 11) == 0) {
+ buffer += 11;
+ length -= 11;
+
+ if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
+ if (buffer[5] == '1')
+ cumanascsi_2_terminator_ctl(host, 1);
+ else if (buffer[5] == '0')
+ cumanascsi_2_terminator_ctl(host, 0);
+ else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int cumanascsi_2_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+ struct cumanascsi2_info *info;
+ info = (struct cumanascsi2_info *)host->hostdata;
+
+ seq_printf(m, "Cumana SCSI II driver v%s\n", VERSION);
+ fas216_print_host(&info->info, m);
+ seq_printf(m, "Term : o%s\n",
+ info->terms ? "n" : "ff");
+
+ fas216_print_stats(&info->info, m);
+ fas216_print_devices(&info->info, m);
+ return 0;
+}
+
+static struct scsi_host_template cumanascsi2_template = {
+ .module = THIS_MODULE,
+ .show_info = cumanascsi_2_show_info,
+ .write_info = cumanascsi_2_set_proc_info,
+ .name = "Cumana SCSI II",
+ .info = cumanascsi_2_info,
+ .queuecommand = fas216_queue_command,
+ .eh_host_reset_handler = fas216_eh_host_reset,
+ .eh_bus_reset_handler = fas216_eh_bus_reset,
+ .eh_device_reset_handler = fas216_eh_device_reset,
+ .eh_abort_handler = fas216_eh_abort,
+ .can_queue = 1,
+ .this_id = 7,
+ .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
+ .dma_boundary = IOMD_DMA_BOUNDARY,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "cumanascsi2",
+};
+
+static int cumanascsi2_probe(struct expansion_card *ec,
+ const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ struct cumanascsi2_info *info;
+ void __iomem *base;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+ if (!base) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ host = scsi_host_alloc(&cumanascsi2_template,
+ sizeof(struct cumanascsi2_info));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ ecard_set_drvdata(ec, host);
+
+ info = (struct cumanascsi2_info *)host->hostdata;
+ info->ec = ec;
+ info->base = base;
+
+ cumanascsi_2_terminator_ctl(host, term[ec->slot_no]);
+
+ info->info.scsi.io_base = base + CUMANASCSI2_FAS216_OFFSET;
+ info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT;
+ info->info.scsi.irq = ec->irq;
+ info->info.scsi.dma = ec->dma;
+ info->info.ifcfg.clockrate = 40; /* MHz */
+ info->info.ifcfg.select_timeout = 255;
+ info->info.ifcfg.asyncperiod = 200; /* ns */
+ info->info.ifcfg.sync_max_depth = 7;
+ info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
+ info->info.ifcfg.disconnect_ok = 1;
+ info->info.ifcfg.wide_max_size = 0;
+ info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
+ info->info.dma.setup = cumanascsi_2_dma_setup;
+ info->info.dma.pseudo = cumanascsi_2_dma_pseudo;
+ info->info.dma.stop = cumanascsi_2_dma_stop;
+
+ ec->irqaddr = info->base + CUMANASCSI2_STATUS;
+ ec->irqmask = STATUS_INT;
+
+ ecard_setirq(ec, &cumanascsi_2_ops, info);
+
+ ret = fas216_init(host);
+ if (ret)
+ goto out_free;
+
+ ret = request_irq(ec->irq, cumanascsi_2_intr,
+ 0, "cumanascsi2", info);
+ if (ret) {
+ printk("scsi%d: IRQ%d not free: %d\n",
+ host->host_no, ec->irq, ret);
+ goto out_release;
+ }
+
+ if (info->info.scsi.dma != NO_DMA) {
+ if (request_dma(info->info.scsi.dma, "cumanascsi2")) {
+ printk("scsi%d: DMA%d not free, using PIO\n",
+ host->host_no, info->info.scsi.dma);
+ info->info.scsi.dma = NO_DMA;
+ } else {
+ set_dma_speed(info->info.scsi.dma, 180);
+ info->info.ifcfg.capabilities |= FASCAP_DMA;
+ }
+ }
+
+ ret = fas216_add(host, &ec->dev);
+ if (ret == 0)
+ goto out;
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, host);
+
+ out_release:
+ fas216_release(host);
+
+ out_free:
+ scsi_host_put(host);
+
+ out_region:
+ ecard_release_resources(ec);
+
+ out:
+ return ret;
+}
+
+static void cumanascsi2_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+
+ ecard_set_drvdata(ec, NULL);
+ fas216_remove(host);
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, info);
+
+ fas216_release(host);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id cumanascsi2_cids[] = {
+ { MANU_CUMANA, PROD_CUMANA_SCSI_2 },
+ { 0xffff, 0xffff },
+};
+
+static struct ecard_driver cumanascsi2_driver = {
+ .probe = cumanascsi2_probe,
+ .remove = cumanascsi2_remove,
+ .id_table = cumanascsi2_cids,
+ .drv = {
+ .name = "cumanascsi2",
+ },
+};
+
+static int __init cumanascsi2_init(void)
+{
+ return ecard_register_driver(&cumanascsi2_driver);
+}
+
+static void __exit cumanascsi2_exit(void)
+{
+ ecard_remove_driver(&cumanascsi2_driver);
+}
+
+module_init(cumanascsi2_init);
+module_exit(cumanascsi2_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines");
+module_param_array(term, int, NULL, 0);
+MODULE_PARM_DESC(term, "SCSI bus termination");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/eesox.c b/drivers/scsi/arm/eesox.c
new file mode 100644
index 0000000..a8ad688
--- /dev/null
+++ b/drivers/scsi/arm/eesox.c
@@ -0,0 +1,644 @@
+/*
+ * linux/drivers/acorn/scsi/eesox.c
+ *
+ * Copyright (C) 1997-2005 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.
+ *
+ * This driver is based on experimentation. Hence, it may have made
+ * assumptions about the particular card that I have available, and
+ * may not be reliable!
+ *
+ * Changelog:
+ * 01-10-1997 RMK Created, READONLY version
+ * 15-02-1998 RMK READ/WRITE version
+ * added DMA support and hardware definitions
+ * 14-03-1998 RMK Updated DMA support
+ * Added terminator control
+ * 15-04-1998 RMK Only do PIO if FAS216 will allow it.
+ * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
+ * 02-04-2000 RMK 0.0.3 Fixed NO_IRQ/NO_DMA problem, updated for new
+ * error handling code.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/ecard.h>
+#include <asm/pgtable.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+#include "scsi.h"
+
+#include <scsi/scsicam.h>
+
+#define EESOX_FAS216_OFFSET 0x3000
+#define EESOX_FAS216_SHIFT 5
+
+#define EESOX_DMASTAT 0x2800
+#define EESOX_STAT_INTR 0x01
+#define EESOX_STAT_DMA 0x02
+
+#define EESOX_CONTROL 0x2800
+#define EESOX_INTR_ENABLE 0x04
+#define EESOX_TERM_ENABLE 0x02
+#define EESOX_RESET 0x01
+
+#define EESOX_DMADATA 0x3800
+
+#define VERSION "1.10 (17/01/2003 2.5.59)"
+
+/*
+ * Use term=0,1,0,0,0 to turn terminators on/off
+ */
+static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
+
+#define NR_SG 256
+
+struct eesoxscsi_info {
+ FAS216_Info info;
+ struct expansion_card *ec;
+ void __iomem *base;
+ void __iomem *ctl_port;
+ unsigned int control;
+ struct scatterlist sg[NR_SG]; /* Scatter DMA list */
+};
+
+/* Prototype: void eesoxscsi_irqenable(ec, irqnr)
+ * Purpose : Enable interrupts on EESOX SCSI card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+eesoxscsi_irqenable(struct expansion_card *ec, int irqnr)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
+
+ info->control |= EESOX_INTR_ENABLE;
+
+ writeb(info->control, info->ctl_port);
+}
+
+/* Prototype: void eesoxscsi_irqdisable(ec, irqnr)
+ * Purpose : Disable interrupts on EESOX SCSI card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+eesoxscsi_irqdisable(struct expansion_card *ec, int irqnr)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;
+
+ info->control &= ~EESOX_INTR_ENABLE;
+
+ writeb(info->control, info->ctl_port);
+}
+
+static const expansioncard_ops_t eesoxscsi_ops = {
+ .irqenable = eesoxscsi_irqenable,
+ .irqdisable = eesoxscsi_irqdisable,
+};
+
+/* Prototype: void eesoxscsi_terminator_ctl(*host, on_off)
+ * Purpose : Turn the EESOX SCSI terminators on or off
+ * Params : host - card to turn on/off
+ * : on_off - !0 to turn on, 0 to turn off
+ */
+static void
+eesoxscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ unsigned long flags;
+
+ spin_lock_irqsave(host->host_lock, flags);
+ if (on_off)
+ info->control |= EESOX_TERM_ENABLE;
+ else
+ info->control &= ~EESOX_TERM_ENABLE;
+
+ writeb(info->control, info->ctl_port);
+ spin_unlock_irqrestore(host->host_lock, flags);
+}
+
+/* Prototype: void eesoxscsi_intr(irq, *dev_id, *regs)
+ * Purpose : handle interrupts from EESOX SCSI card
+ * Params : irq - interrupt number
+ * dev_id - user-defined (Scsi_Host structure)
+ */
+static irqreturn_t
+eesoxscsi_intr(int irq, void *dev_id)
+{
+ struct eesoxscsi_info *info = dev_id;
+
+ return fas216_intr(&info->info);
+}
+
+/* Prototype: fasdmatype_t eesoxscsi_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose : initialises DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * min_type - minimum DMA support that we must have for this transfer
+ * Returns : type of transfer to be performed
+ */
+static fasdmatype_t
+eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, fasdmatype_t min_type)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ struct device *dev = scsi_get_device(host);
+ int dmach = info->info.scsi.dma;
+
+ if (dmach != NO_DMA &&
+ (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
+ int bufs, map_dir, dma_dir;
+
+ bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
+
+ if (direction == DMA_OUT)
+ map_dir = DMA_TO_DEVICE,
+ dma_dir = DMA_MODE_WRITE;
+ else
+ map_dir = DMA_FROM_DEVICE,
+ dma_dir = DMA_MODE_READ;
+
+ dma_map_sg(dev, info->sg, bufs, map_dir);
+
+ disable_dma(dmach);
+ set_dma_sg(dmach, info->sg, bufs);
+ set_dma_mode(dmach, dma_dir);
+ enable_dma(dmach);
+ return fasdma_real_all;
+ }
+ /*
+ * We don't do DMA, we only do slow PIO
+ *
+ * Some day, we will do Pseudo DMA
+ */
+ return fasdma_pseudo;
+}
+
+static void eesoxscsi_buffer_in(void *buf, int length, void __iomem *base)
+{
+ const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
+ const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
+ const void __iomem *reg_dmadata = base + EESOX_DMADATA;
+ register const unsigned long mask = 0xffff;
+
+ do {
+ unsigned int status;
+
+ /*
+ * Interrupt request?
+ */
+ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
+ if (status & STAT_INT)
+ break;
+
+ /*
+ * DMA request active?
+ */
+ status = readb(reg_dmastat);
+ if (!(status & EESOX_STAT_DMA))
+ continue;
+
+ /*
+ * Get number of bytes in FIFO
+ */
+ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
+ if (status > 16)
+ status = 16;
+ if (status > length)
+ status = length;
+
+ /*
+ * Align buffer.
+ */
+ if (((u32)buf) & 2 && status >= 2) {
+ *(u16 *)buf = readl(reg_dmadata);
+ buf += 2;
+ status -= 2;
+ length -= 2;
+ }
+
+ if (status >= 8) {
+ unsigned long l1, l2;
+
+ l1 = readl(reg_dmadata) & mask;
+ l1 |= readl(reg_dmadata) << 16;
+ l2 = readl(reg_dmadata) & mask;
+ l2 |= readl(reg_dmadata) << 16;
+ *(u32 *)buf = l1;
+ buf += 4;
+ *(u32 *)buf = l2;
+ buf += 4;
+ length -= 8;
+ continue;
+ }
+
+ if (status >= 4) {
+ unsigned long l1;
+
+ l1 = readl(reg_dmadata) & mask;
+ l1 |= readl(reg_dmadata) << 16;
+
+ *(u32 *)buf = l1;
+ buf += 4;
+ length -= 4;
+ continue;
+ }
+
+ if (status >= 2) {
+ *(u16 *)buf = readl(reg_dmadata);
+ buf += 2;
+ length -= 2;
+ }
+ } while (length);
+}
+
+static void eesoxscsi_buffer_out(void *buf, int length, void __iomem *base)
+{
+ const void __iomem *reg_fas = base + EESOX_FAS216_OFFSET;
+ const void __iomem *reg_dmastat = base + EESOX_DMASTAT;
+ void __iomem *reg_dmadata = base + EESOX_DMADATA;
+
+ do {
+ unsigned int status;
+
+ /*
+ * Interrupt request?
+ */
+ status = readb(reg_fas + (REG_STAT << EESOX_FAS216_SHIFT));
+ if (status & STAT_INT)
+ break;
+
+ /*
+ * DMA request active?
+ */
+ status = readb(reg_dmastat);
+ if (!(status & EESOX_STAT_DMA))
+ continue;
+
+ /*
+ * Get number of bytes in FIFO
+ */
+ status = readb(reg_fas + (REG_CFIS << EESOX_FAS216_SHIFT)) & CFIS_CF;
+ if (status > 16)
+ status = 16;
+ status = 16 - status;
+ if (status > length)
+ status = length;
+ status &= ~1;
+
+ /*
+ * Align buffer.
+ */
+ if (((u32)buf) & 2 && status >= 2) {
+ writel(*(u16 *)buf << 16, reg_dmadata);
+ buf += 2;
+ status -= 2;
+ length -= 2;
+ }
+
+ if (status >= 8) {
+ unsigned long l1, l2;
+
+ l1 = *(u32 *)buf;
+ buf += 4;
+ l2 = *(u32 *)buf;
+ buf += 4;
+
+ writel(l1 << 16, reg_dmadata);
+ writel(l1, reg_dmadata);
+ writel(l2 << 16, reg_dmadata);
+ writel(l2, reg_dmadata);
+ length -= 8;
+ continue;
+ }
+
+ if (status >= 4) {
+ unsigned long l1;
+
+ l1 = *(u32 *)buf;
+ buf += 4;
+
+ writel(l1 << 16, reg_dmadata);
+ writel(l1, reg_dmadata);
+ length -= 4;
+ continue;
+ }
+
+ if (status >= 2) {
+ writel(*(u16 *)buf << 16, reg_dmadata);
+ buf += 2;
+ length -= 2;
+ }
+ } while (length);
+}
+
+static void
+eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t dir, int transfer_size)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ if (dir == DMA_IN) {
+ eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base);
+ } else {
+ eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base);
+ }
+}
+
+/* Prototype: int eesoxscsi_dma_stop(host, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ */
+static void
+eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ if (info->info.scsi.dma != NO_DMA)
+ disable_dma(info->info.scsi.dma);
+}
+
+/* Prototype: const char *eesoxscsi_info(struct Scsi_Host * host)
+ * Purpose : returns a descriptive string about this interface,
+ * Params : host - driver host structure to return info for.
+ * Returns : pointer to a static buffer containing null terminated string.
+ */
+const char *eesoxscsi_info(struct Scsi_Host *host)
+{
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ static char string[150];
+
+ sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
+ host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+ VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff");
+
+ return string;
+}
+
+/* Prototype: int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+ * Purpose : Set a driver specific function
+ * Params : host - host to setup
+ * : buffer - buffer containing string describing operation
+ * : length - length of string
+ * Returns : -EINVAL, or 0
+ */
+static int
+eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+{
+ int ret = length;
+
+ if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) {
+ buffer += 9;
+ length -= 9;
+
+ if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
+ if (buffer[5] == '1')
+ eesoxscsi_terminator_ctl(host, 1);
+ else if (buffer[5] == '0')
+ eesoxscsi_terminator_ctl(host, 0);
+ else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+static int eesoxscsi_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+ struct eesoxscsi_info *info;
+
+ info = (struct eesoxscsi_info *)host->hostdata;
+
+ seq_printf(m, "EESOX SCSI driver v%s\n", VERSION);
+ fas216_print_host(&info->info, m);
+ seq_printf(m, "Term : o%s\n",
+ info->control & EESOX_TERM_ENABLE ? "n" : "ff");
+
+ fas216_print_stats(&info->info, m);
+ fas216_print_devices(&info->info, m);
+ return 0;
+}
+
+static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+
+ return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0);
+}
+
+static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+ unsigned long flags;
+
+ if (len > 1) {
+ spin_lock_irqsave(host->host_lock, flags);
+ if (buf[0] != '0') {
+ info->control |= EESOX_TERM_ENABLE;
+ } else {
+ info->control &= ~EESOX_TERM_ENABLE;
+ }
+ writeb(info->control, info->ctl_port);
+ spin_unlock_irqrestore(host->host_lock, flags);
+ }
+
+ return len;
+}
+
+static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
+ eesoxscsi_show_term, eesoxscsi_store_term);
+
+static struct scsi_host_template eesox_template = {
+ .module = THIS_MODULE,
+ .show_info = eesoxscsi_show_info,
+ .write_info = eesoxscsi_set_proc_info,
+ .name = "EESOX SCSI",
+ .info = eesoxscsi_info,
+ .queuecommand = fas216_queue_command,
+ .eh_host_reset_handler = fas216_eh_host_reset,
+ .eh_bus_reset_handler = fas216_eh_bus_reset,
+ .eh_device_reset_handler = fas216_eh_device_reset,
+ .eh_abort_handler = fas216_eh_abort,
+ .can_queue = 1,
+ .this_id = 7,
+ .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
+ .dma_boundary = IOMD_DMA_BOUNDARY,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "eesox",
+};
+
+static int eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ struct eesoxscsi_info *info;
+ void __iomem *base;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+ if (!base) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ host = scsi_host_alloc(&eesox_template,
+ sizeof(struct eesoxscsi_info));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ ecard_set_drvdata(ec, host);
+
+ info = (struct eesoxscsi_info *)host->hostdata;
+ info->ec = ec;
+ info->base = base;
+ info->ctl_port = base + EESOX_CONTROL;
+ info->control = term[ec->slot_no] ? EESOX_TERM_ENABLE : 0;
+ writeb(info->control, info->ctl_port);
+
+ info->info.scsi.io_base = base + EESOX_FAS216_OFFSET;
+ info->info.scsi.io_shift = EESOX_FAS216_SHIFT;
+ info->info.scsi.irq = ec->irq;
+ info->info.scsi.dma = ec->dma;
+ info->info.ifcfg.clockrate = 40; /* MHz */
+ info->info.ifcfg.select_timeout = 255;
+ info->info.ifcfg.asyncperiod = 200; /* ns */
+ info->info.ifcfg.sync_max_depth = 7;
+ info->info.ifcfg.cntl3 = CNTL3_FASTSCSI | CNTL3_FASTCLK;
+ info->info.ifcfg.disconnect_ok = 1;
+ info->info.ifcfg.wide_max_size = 0;
+ info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
+ info->info.dma.setup = eesoxscsi_dma_setup;
+ info->info.dma.pseudo = eesoxscsi_dma_pseudo;
+ info->info.dma.stop = eesoxscsi_dma_stop;
+
+ ec->irqaddr = base + EESOX_DMASTAT;
+ ec->irqmask = EESOX_STAT_INTR;
+
+ ecard_setirq(ec, &eesoxscsi_ops, info);
+
+ device_create_file(&ec->dev, &dev_attr_bus_term);
+
+ ret = fas216_init(host);
+ if (ret)
+ goto out_free;
+
+ ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info);
+ if (ret) {
+ printk("scsi%d: IRQ%d not free: %d\n",
+ host->host_no, ec->irq, ret);
+ goto out_remove;
+ }
+
+ if (info->info.scsi.dma != NO_DMA) {
+ if (request_dma(info->info.scsi.dma, "eesox")) {
+ printk("scsi%d: DMA%d not free, DMA disabled\n",
+ host->host_no, info->info.scsi.dma);
+ info->info.scsi.dma = NO_DMA;
+ } else {
+ set_dma_speed(info->info.scsi.dma, 180);
+ info->info.ifcfg.capabilities |= FASCAP_DMA;
+ info->info.ifcfg.cntl3 |= CNTL3_BS8;
+ }
+ }
+
+ ret = fas216_add(host, &ec->dev);
+ if (ret == 0)
+ goto out;
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, host);
+
+ out_remove:
+ fas216_remove(host);
+
+ out_free:
+ device_remove_file(&ec->dev, &dev_attr_bus_term);
+ scsi_host_put(host);
+
+ out_region:
+ ecard_release_resources(ec);
+
+ out:
+ return ret;
+}
+
+static void eesoxscsi_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
+
+ ecard_set_drvdata(ec, NULL);
+ fas216_remove(host);
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, info);
+
+ device_remove_file(&ec->dev, &dev_attr_bus_term);
+
+ fas216_release(host);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id eesoxscsi_cids[] = {
+ { MANU_EESOX, PROD_EESOX_SCSI2 },
+ { 0xffff, 0xffff },
+};
+
+static struct ecard_driver eesoxscsi_driver = {
+ .probe = eesoxscsi_probe,
+ .remove = eesoxscsi_remove,
+ .id_table = eesoxscsi_cids,
+ .drv = {
+ .name = "eesoxscsi",
+ },
+};
+
+static int __init eesox_init(void)
+{
+ return ecard_register_driver(&eesoxscsi_driver);
+}
+
+static void __exit eesox_exit(void)
+{
+ ecard_remove_driver(&eesoxscsi_driver);
+}
+
+module_init(eesox_init);
+module_exit(eesox_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines");
+module_param_array(term, int, NULL, 0);
+MODULE_PARM_DESC(term, "SCSI bus termination");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c
new file mode 100644
index 0000000..decdc71
--- /dev/null
+++ b/drivers/scsi/arm/fas216.c
@@ -0,0 +1,3032 @@
+/*
+ * linux/drivers/acorn/scsi/fas216.c
+ *
+ * Copyright (C) 1997-2003 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.
+ *
+ * Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and
+ * other sources, including:
+ * the AMD Am53CF94 data sheet
+ * the AMD Am53C94 data sheet
+ *
+ * This is a generic driver. To use it, have a look at cumana_2.c. You
+ * should define your own structure that overlays FAS216_Info, eg:
+ * struct my_host_data {
+ * FAS216_Info info;
+ * ... my host specific data ...
+ * };
+ *
+ * Changelog:
+ * 30-08-1997 RMK Created
+ * 14-09-1997 RMK Started disconnect support
+ * 08-02-1998 RMK Corrected real DMA support
+ * 15-02-1998 RMK Started sync xfer support
+ * 06-04-1998 RMK Tightened conditions for printing incomplete
+ * transfers
+ * 02-05-1998 RMK Added extra checks in fas216_reset
+ * 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns
+ * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
+ * 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT
+ * 02-04-2000 RMK Converted to use the new error handling, and
+ * automatically request sense data upon check
+ * condition status from targets.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ecard.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+#include "scsi.h"
+
+/* NOTE: SCSI2 Synchronous transfers *require* DMA according to
+ * the data sheet. This restriction is crazy, especially when
+ * you only want to send 16 bytes! What were the guys who
+ * designed this chip on at that time? Did they read the SCSI2
+ * spec at all? The following sections are taken from the SCSI2
+ * standard (s2r10) concerning this:
+ *
+ * > IMPLEMENTORS NOTES:
+ * > (1) Re-negotiation at every selection is not recommended, since a
+ * > significant performance impact is likely.
+ *
+ * > The implied synchronous agreement shall remain in effect until a BUS DEVICE
+ * > RESET message is received, until a hard reset condition occurs, or until one
+ * > of the two SCSI devices elects to modify the agreement. The default data
+ * > transfer mode is asynchronous data transfer mode. The default data transfer
+ * > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard
+ * > reset condition.
+ *
+ * In total, this means that once you have elected to use synchronous
+ * transfers, you must always use DMA.
+ *
+ * I was thinking that this was a good chip until I found this restriction ;(
+ */
+#define SCSI2_SYNC
+#undef SCSI2_TAG
+
+#undef DEBUG_CONNECT
+#undef DEBUG_MESSAGES
+
+#undef CHECK_STRUCTURE
+
+#define LOG_CONNECT (1 << 0)
+#define LOG_BUSSERVICE (1 << 1)
+#define LOG_FUNCTIONDONE (1 << 2)
+#define LOG_MESSAGES (1 << 3)
+#define LOG_BUFFER (1 << 4)
+#define LOG_ERROR (1 << 8)
+
+static int level_mask = LOG_ERROR;
+
+module_param(level_mask, int, 0644);
+
+static int __init fas216_log_setup(char *str)
+{
+ char *s;
+
+ level_mask = 0;
+
+ while ((s = strsep(&str, ",")) != NULL) {
+ switch (s[0]) {
+ case 'a':
+ if (strcmp(s, "all") == 0)
+ level_mask |= -1;
+ break;
+ case 'b':
+ if (strncmp(s, "bus", 3) == 0)
+ level_mask |= LOG_BUSSERVICE;
+ if (strncmp(s, "buf", 3) == 0)
+ level_mask |= LOG_BUFFER;
+ break;
+ case 'c':
+ level_mask |= LOG_CONNECT;
+ break;
+ case 'e':
+ level_mask |= LOG_ERROR;
+ break;
+ case 'm':
+ level_mask |= LOG_MESSAGES;
+ break;
+ case 'n':
+ if (strcmp(s, "none") == 0)
+ level_mask = 0;
+ break;
+ case 's':
+ level_mask |= LOG_FUNCTIONDONE;
+ break;
+ }
+ }
+ return 1;
+}
+
+__setup("fas216_logging=", fas216_log_setup);
+
+static inline unsigned char fas216_readb(FAS216_Info *info, unsigned int reg)
+{
+ unsigned int off = reg << info->scsi.io_shift;
+ return readb(info->scsi.io_base + off);
+}
+
+static inline void fas216_writeb(FAS216_Info *info, unsigned int reg, unsigned int val)
+{
+ unsigned int off = reg << info->scsi.io_shift;
+ writeb(val, info->scsi.io_base + off);
+}
+
+static void fas216_dumpstate(FAS216_Info *info)
+{
+ unsigned char is, stat, inst;
+
+ is = fas216_readb(info, REG_IS);
+ stat = fas216_readb(info, REG_STAT);
+ inst = fas216_readb(info, REG_INST);
+
+ printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X"
+ " INST=%02X IS=%02X CFIS=%02X",
+ fas216_readb(info, REG_CTCL),
+ fas216_readb(info, REG_CTCM),
+ fas216_readb(info, REG_CMD), stat, inst, is,
+ fas216_readb(info, REG_CFIS));
+ printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02X\n",
+ fas216_readb(info, REG_CNTL1),
+ fas216_readb(info, REG_CNTL2),
+ fas216_readb(info, REG_CNTL3),
+ fas216_readb(info, REG_CTCH));
+}
+
+static void print_SCp(struct scsi_pointer *SCp, const char *prefix, const char *suffix)
+{
+ printk("%sptr %p this_residual 0x%x buffer %p buffers_residual 0x%x%s",
+ prefix, SCp->ptr, SCp->this_residual, SCp->buffer,
+ SCp->buffers_residual, suffix);
+}
+
+#ifdef CHECK_STRUCTURE
+static void fas216_dumpinfo(FAS216_Info *info)
+{
+ static int used = 0;
+ int i;
+
+ if (used++)
+ return;
+
+ printk("FAS216_Info=\n");
+ printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%p\n",
+ info->magic_start, info->host, info->SCpnt,
+ info->origSCpnt);
+ printk(" scsi={ io_shift=%X irq=%X cfg={ %X %X %X %X }\n",
+ info->scsi.io_shift, info->scsi.irq,
+ info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2],
+ info->scsi.cfg[3]);
+ printk(" type=%p phase=%X\n",
+ info->scsi.type, info->scsi.phase);
+ print_SCp(&info->scsi.SCp, " SCp={ ", " }\n");
+ printk(" msgs async_stp=%X disconnectable=%d aborting=%d }\n",
+ info->scsi.async_stp,
+ info->scsi.disconnectable, info->scsi.aborting);
+ printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%X\n"
+ " disconnects=%X aborts=%X bus_resets=%X host_resets=%X}\n",
+ info->stats.queues, info->stats.removes, info->stats.fins,
+ info->stats.reads, info->stats.writes, info->stats.miscs,
+ info->stats.disconnects, info->stats.aborts, info->stats.bus_resets,
+ info->stats.host_resets);
+ printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }\n",
+ info->ifcfg.clockrate, info->ifcfg.select_timeout,
+ info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth);
+ for (i = 0; i < 8; i++) {
+ printk(" busyluns[%d]=%08lx dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }\n",
+ i, info->busyluns[i], i,
+ info->device[i].disconnect_ok, info->device[i].stp,
+ info->device[i].sof, info->device[i].sync_state);
+ }
+ printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }\n",
+ info->dma.transfer_type, info->dma.setup,
+ info->dma.pseudo, info->dma.stop);
+ printk(" internal_done=%X magic_end=%lX }\n",
+ info->internal_done, info->magic_end);
+}
+
+static void __fas216_checkmagic(FAS216_Info *info, const char *func)
+{
+ int corruption = 0;
+ if (info->magic_start != MAGIC) {
+ printk(KERN_CRIT "FAS216 Error: magic at start corrupted\n");
+ corruption++;
+ }
+ if (info->magic_end != MAGIC) {
+ printk(KERN_CRIT "FAS216 Error: magic at end corrupted\n");
+ corruption++;
+ }
+ if (corruption) {
+ fas216_dumpinfo(info);
+ panic("scsi memory space corrupted in %s", func);
+ }
+}
+#define fas216_checkmagic(info) __fas216_checkmagic((info), __func__)
+#else
+#define fas216_checkmagic(info)
+#endif
+
+static const char *fas216_bus_phase(int stat)
+{
+ static const char *phases[] = {
+ "DATA OUT", "DATA IN",
+ "COMMAND", "STATUS",
+ "MISC OUT", "MISC IN",
+ "MESG OUT", "MESG IN"
+ };
+
+ return phases[stat & STAT_BUSMASK];
+}
+
+static const char *fas216_drv_phase(FAS216_Info *info)
+{
+ static const char *phases[] = {
+ [PHASE_IDLE] = "idle",
+ [PHASE_SELECTION] = "selection",
+ [PHASE_COMMAND] = "command",
+ [PHASE_DATAOUT] = "data out",
+ [PHASE_DATAIN] = "data in",
+ [PHASE_MSGIN] = "message in",
+ [PHASE_MSGIN_DISCONNECT]= "disconnect",
+ [PHASE_MSGOUT_EXPECT] = "expect message out",
+ [PHASE_MSGOUT] = "message out",
+ [PHASE_STATUS] = "status",
+ [PHASE_DONE] = "done",
+ };
+
+ if (info->scsi.phase < ARRAY_SIZE(phases) &&
+ phases[info->scsi.phase])
+ return phases[info->scsi.phase];
+ return "???";
+}
+
+static char fas216_target(FAS216_Info *info)
+{
+ if (info->SCpnt)
+ return '0' + info->SCpnt->device->id;
+ else
+ return 'H';
+}
+
+static void
+fas216_do_log(FAS216_Info *info, char target, char *fmt, va_list ap)
+{
+ static char buf[1024];
+
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ printk("scsi%d.%c: %s", info->host->host_no, target, buf);
+}
+
+static void fas216_log_command(FAS216_Info *info, int level,
+ struct scsi_cmnd *SCpnt, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ va_start(args, fmt);
+ fas216_do_log(info, '0' + SCpnt->device->id, fmt, args);
+ va_end(args);
+
+ scsi_print_command(SCpnt);
+}
+
+static void
+fas216_log_target(FAS216_Info *info, int level, int target, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ if (target < 0)
+ target = 'H';
+ else
+ target += '0';
+
+ va_start(args, fmt);
+ fas216_do_log(info, target, fmt, args);
+ va_end(args);
+
+ printk("\n");
+}
+
+static void fas216_log(FAS216_Info *info, int level, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ va_start(args, fmt);
+ fas216_do_log(info, fas216_target(info), fmt, args);
+ va_end(args);
+
+ printk("\n");
+}
+
+#define PH_SIZE 32
+
+static struct { int stat, ssr, isr, ph; } ph_list[PH_SIZE];
+static int ph_ptr;
+
+static void add_debug_list(int stat, int ssr, int isr, int ph)
+{
+ ph_list[ph_ptr].stat = stat;
+ ph_list[ph_ptr].ssr = ssr;
+ ph_list[ph_ptr].isr = isr;
+ ph_list[ph_ptr].ph = ph;
+
+ ph_ptr = (ph_ptr + 1) & (PH_SIZE-1);
+}
+
+static struct { int command; void *from; } cmd_list[8];
+static int cmd_ptr;
+
+static void fas216_cmd(FAS216_Info *info, unsigned int command)
+{
+ cmd_list[cmd_ptr].command = command;
+ cmd_list[cmd_ptr].from = __builtin_return_address(0);
+
+ cmd_ptr = (cmd_ptr + 1) & 7;
+
+ fas216_writeb(info, REG_CMD, command);
+}
+
+static void print_debug_list(void)
+{
+ int i;
+
+ i = ph_ptr;
+
+ printk(KERN_ERR "SCSI IRQ trail\n");
+ do {
+ printk(" %02x:%02x:%02x:%1x",
+ ph_list[i].stat, ph_list[i].ssr,
+ ph_list[i].isr, ph_list[i].ph);
+ i = (i + 1) & (PH_SIZE - 1);
+ if (((i ^ ph_ptr) & 7) == 0)
+ printk("\n");
+ } while (i != ph_ptr);
+ if ((i ^ ph_ptr) & 7)
+ printk("\n");
+
+ i = cmd_ptr;
+ printk(KERN_ERR "FAS216 commands: ");
+ do {
+ printk("%02x:%p ", cmd_list[i].command, cmd_list[i].from);
+ i = (i + 1) & 7;
+ } while (i != cmd_ptr);
+ printk("\n");
+}
+
+static void fas216_done(FAS216_Info *info, unsigned int result);
+
+/**
+ * fas216_get_last_msg - retrive last message from the list
+ * @info: interface to search
+ * @pos: current fifo position
+ *
+ * Retrieve a last message from the list, using position in fifo.
+ */
+static inline unsigned short
+fas216_get_last_msg(FAS216_Info *info, int pos)
+{
+ unsigned short packed_msg = NOP;
+ struct message *msg;
+ int msgnr = 0;
+
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ if (pos >= msg->fifo)
+ break;
+ }
+
+ if (msg) {
+ if (msg->msg[0] == EXTENDED_MESSAGE)
+ packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8;
+ else
+ packed_msg = msg->msg[0];
+ }
+
+ fas216_log(info, LOG_MESSAGES,
+ "Message: %04x found at position %02x\n", packed_msg, pos);
+
+ return packed_msg;
+}
+
+/**
+ * fas216_syncperiod - calculate STP register value
+ * @info: state structure for interface connected to device
+ * @ns: period in ns (between subsequent bytes)
+ *
+ * Calculate value to be loaded into the STP register for a given period
+ * in ns. Returns a value suitable for REG_STP.
+ */
+static int fas216_syncperiod(FAS216_Info *info, int ns)
+{
+ int value = (info->ifcfg.clockrate * ns) / 1000;
+
+ fas216_checkmagic(info);
+
+ if (value < 4)
+ value = 4;
+ else if (value > 35)
+ value = 35;
+
+ return value & 31;
+}
+
+/**
+ * fas216_set_sync - setup FAS216 chip for specified transfer period.
+ * @info: state structure for interface connected to device
+ * @target: target
+ *
+ * Correctly setup FAS216 chip for specified transfer period.
+ * Notes : we need to switch the chip out of FASTSCSI mode if we have
+ * a transfer period >= 200ns - otherwise the chip will violate
+ * the SCSI timings.
+ */
+static void fas216_set_sync(FAS216_Info *info, int target)
+{
+ unsigned int cntl3;
+
+ fas216_writeb(info, REG_SOF, info->device[target].sof);
+ fas216_writeb(info, REG_STP, info->device[target].stp);
+
+ cntl3 = info->scsi.cfg[2];
+ if (info->device[target].period >= (200 / 4))
+ cntl3 = cntl3 & ~CNTL3_FASTSCSI;
+
+ fas216_writeb(info, REG_CNTL3, cntl3);
+}
+
+/* Synchronous transfer support
+ *
+ * Note: The SCSI II r10 spec says (5.6.12):
+ *
+ * (2) Due to historical problems with early host adapters that could
+ * not accept an SDTR message, some targets may not initiate synchronous
+ * negotiation after a power cycle as required by this standard. Host
+ * adapters that support synchronous mode may avoid the ensuing failure
+ * modes when the target is independently power cycled by initiating a
+ * synchronous negotiation on each REQUEST SENSE and INQUIRY command.
+ * This approach increases the SCSI bus overhead and is not recommended
+ * for new implementations. The correct method is to respond to an
+ * SDTR message with a MESSAGE REJECT message if the either the
+ * initiator or target devices does not support synchronous transfers
+ * or does not want to negotiate for synchronous transfers at the time.
+ * Using the correct method assures compatibility with wide data
+ * transfers and future enhancements.
+ *
+ * We will always initiate a synchronous transfer negotiation request on
+ * every INQUIRY or REQUEST SENSE message, unless the target itself has
+ * at some point performed a synchronous transfer negotiation request, or
+ * we have synchronous transfers disabled for this device.
+ */
+
+/**
+ * fas216_handlesync - Handle a synchronous transfer message
+ * @info: state structure for interface
+ * @msg: message from target
+ *
+ * Handle a synchronous transfer message from the target
+ */
+static void fas216_handlesync(FAS216_Info *info, char *msg)
+{
+ struct fas216_device *dev = &info->device[info->SCpnt->device->id];
+ enum { sync, async, none, reject } res = none;
+
+#ifdef SCSI2_SYNC
+ switch (msg[0]) {
+ case MESSAGE_REJECT:
+ /* Synchronous transfer request failed.
+ * Note: SCSI II r10:
+ *
+ * SCSI devices that are capable of synchronous
+ * data transfers shall not respond to an SDTR
+ * message with a MESSAGE REJECT message.
+ *
+ * Hence, if we get this condition, we disable
+ * negotiation for this device.
+ */
+ if (dev->sync_state == neg_inprogress) {
+ dev->sync_state = neg_invalid;
+ res = async;
+ }
+ break;
+
+ case EXTENDED_MESSAGE:
+ switch (dev->sync_state) {
+ /* We don't accept synchronous transfer requests.
+ * Respond with a MESSAGE_REJECT to prevent a
+ * synchronous transfer agreement from being reached.
+ */
+ case neg_invalid:
+ res = reject;
+ break;
+
+ /* We were not negotiating a synchronous transfer,
+ * but the device sent us a negotiation request.
+ * Honour the request by sending back a SDTR
+ * message containing our capability, limited by
+ * the targets capability.
+ */
+ default:
+ fas216_cmd(info, CMD_SETATN);
+ if (msg[4] > info->ifcfg.sync_max_depth)
+ msg[4] = info->ifcfg.sync_max_depth;
+ if (msg[3] < 1000 / info->ifcfg.clockrate)
+ msg[3] = 1000 / info->ifcfg.clockrate;
+
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 5,
+ EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
+ msg[3], msg[4]);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+
+ /* This is wrong. The agreement is not in effect
+ * until this message is accepted by the device
+ */
+ dev->sync_state = neg_targcomplete;
+ res = sync;
+ break;
+
+ /* We initiated the synchronous transfer negotiation,
+ * and have successfully received a response from the
+ * target. The synchronous transfer agreement has been
+ * reached. Note: if the values returned are out of our
+ * bounds, we must reject the message.
+ */
+ case neg_inprogress:
+ res = reject;
+ if (msg[4] <= info->ifcfg.sync_max_depth &&
+ msg[3] >= 1000 / info->ifcfg.clockrate) {
+ dev->sync_state = neg_complete;
+ res = sync;
+ }
+ break;
+ }
+ }
+#else
+ res = reject;
+#endif
+
+ switch (res) {
+ case sync:
+ dev->period = msg[3];
+ dev->sof = msg[4];
+ dev->stp = fas216_syncperiod(info, msg[3] * 4);
+ fas216_set_sync(info, info->SCpnt->device->id);
+ break;
+
+ case reject:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+
+ case async:
+ dev->period = info->ifcfg.asyncperiod / 4;
+ dev->sof = 0;
+ dev->stp = info->scsi.async_stp;
+ fas216_set_sync(info, info->SCpnt->device->id);
+ break;
+
+ case none:
+ break;
+ }
+}
+
+/**
+ * fas216_updateptrs - update data pointers after transfer suspended/paused
+ * @info: interface's local pointer to update
+ * @bytes_transferred: number of bytes transferred
+ *
+ * Update data pointers after transfer suspended/paused
+ */
+static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
+{
+ struct scsi_pointer *SCp = &info->scsi.SCp;
+
+ fas216_checkmagic(info);
+
+ BUG_ON(bytes_transferred < 0);
+
+ SCp->phase -= bytes_transferred;
+
+ while (bytes_transferred != 0) {
+ if (SCp->this_residual > bytes_transferred)
+ break;
+ /*
+ * We have used up this buffer. Move on to the
+ * next buffer.
+ */
+ bytes_transferred -= SCp->this_residual;
+ if (!next_SCp(SCp) && bytes_transferred) {
+ printk(KERN_WARNING "scsi%d.%c: out of buffers\n",
+ info->host->host_no, '0' + info->SCpnt->device->id);
+ return;
+ }
+ }
+
+ SCp->this_residual -= bytes_transferred;
+ if (SCp->this_residual)
+ SCp->ptr += bytes_transferred;
+ else
+ SCp->ptr = NULL;
+}
+
+/**
+ * fas216_pio - transfer data off of/on to card using programmed IO
+ * @info: interface to transfer data to/from
+ * @direction: direction to transfer data (DMA_OUT/DMA_IN)
+ *
+ * Transfer data off of/on to card using programmed IO.
+ * Notes: this is incredibly slow.
+ */
+static void fas216_pio(FAS216_Info *info, fasdmadir_t direction)
+{
+ struct scsi_pointer *SCp = &info->scsi.SCp;
+
+ fas216_checkmagic(info);
+
+ if (direction == DMA_OUT)
+ fas216_writeb(info, REG_FF, get_next_SCp_byte(SCp));
+ else
+ put_next_SCp_byte(SCp, fas216_readb(info, REG_FF));
+
+ if (SCp->this_residual == 0)
+ next_SCp(SCp);
+}
+
+static void fas216_set_stc(FAS216_Info *info, unsigned int length)
+{
+ fas216_writeb(info, REG_STCL, length);
+ fas216_writeb(info, REG_STCM, length >> 8);
+ fas216_writeb(info, REG_STCH, length >> 16);
+}
+
+static unsigned int fas216_get_ctc(FAS216_Info *info)
+{
+ return fas216_readb(info, REG_CTCL) +
+ (fas216_readb(info, REG_CTCM) << 8) +
+ (fas216_readb(info, REG_CTCH) << 16);
+}
+
+/**
+ * fas216_cleanuptransfer - clean up after a transfer has completed.
+ * @info: interface to clean up
+ *
+ * Update the data pointers according to the number of bytes transferred
+ * on the SCSI bus.
+ */
+static void fas216_cleanuptransfer(FAS216_Info *info)
+{
+ unsigned long total, residual, fifo;
+ fasdmatype_t dmatype = info->dma.transfer_type;
+
+ info->dma.transfer_type = fasdma_none;
+
+ /*
+ * PIO transfers do not need to be cleaned up.
+ */
+ if (dmatype == fasdma_pio || dmatype == fasdma_none)
+ return;
+
+ if (dmatype == fasdma_real_all)
+ total = info->scsi.SCp.phase;
+ else
+ total = info->scsi.SCp.this_residual;
+
+ residual = fas216_get_ctc(info);
+
+ fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+
+ fas216_log(info, LOG_BUFFER, "cleaning up from previous "
+ "transfer: length 0x%06x, residual 0x%x, fifo %d",
+ total, residual, fifo);
+
+ /*
+ * If we were performing Data-Out, the transfer counter
+ * counts down each time a byte is transferred by the
+ * host to the FIFO. This means we must include the
+ * bytes left in the FIFO from the transfer counter.
+ */
+ if (info->scsi.phase == PHASE_DATAOUT)
+ residual += fifo;
+
+ fas216_updateptrs(info, total - residual);
+}
+
+/**
+ * fas216_transfer - Perform a DMA/PIO transfer off of/on to card
+ * @info: interface from which device disconnected from
+ *
+ * Start a DMA/PIO transfer off of/on to card
+ */
+static void fas216_transfer(FAS216_Info *info)
+{
+ fasdmadir_t direction;
+ fasdmatype_t dmatype;
+
+ fas216_log(info, LOG_BUFFER,
+ "starttransfer: buffer %p length 0x%06x reqlen 0x%06x",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual,
+ info->scsi.SCp.phase);
+
+ if (!info->scsi.SCp.ptr) {
+ fas216_log(info, LOG_ERROR, "null buffer passed to "
+ "fas216_starttransfer");
+ print_SCp(&info->scsi.SCp, "SCp: ", "\n");
+ print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n");
+ return;
+ }
+
+ /*
+ * If we have a synchronous transfer agreement in effect, we must
+ * use DMA mode. If we are using asynchronous transfers, we may
+ * use DMA mode or PIO mode.
+ */
+ if (info->device[info->SCpnt->device->id].sof)
+ dmatype = fasdma_real_all;
+ else
+ dmatype = fasdma_pio;
+
+ if (info->scsi.phase == PHASE_DATAOUT)
+ direction = DMA_OUT;
+ else
+ direction = DMA_IN;
+
+ if (info->dma.setup)
+ dmatype = info->dma.setup(info->host, &info->scsi.SCp,
+ direction, dmatype);
+ info->dma.transfer_type = dmatype;
+
+ if (dmatype == fasdma_real_all)
+ fas216_set_stc(info, info->scsi.SCp.phase);
+ else
+ fas216_set_stc(info, info->scsi.SCp.this_residual);
+
+ switch (dmatype) {
+ case fasdma_pio:
+ fas216_log(info, LOG_BUFFER, "PIO transfer");
+ fas216_writeb(info, REG_SOF, 0);
+ fas216_writeb(info, REG_STP, info->scsi.async_stp);
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ fas216_pio(info, direction);
+ break;
+
+ case fasdma_pseudo:
+ fas216_log(info, LOG_BUFFER, "pseudo transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ info->dma.pseudo(info->host, &info->scsi.SCp,
+ direction, info->SCpnt->transfersize);
+ break;
+
+ case fasdma_real_block:
+ fas216_log(info, LOG_BUFFER, "block dma transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ break;
+
+ case fasdma_real_all:
+ fas216_log(info, LOG_BUFFER, "total dma transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ break;
+
+ default:
+ fas216_log(info, LOG_BUFFER | LOG_ERROR,
+ "invalid FAS216 DMA type");
+ break;
+ }
+}
+
+/**
+ * fas216_stoptransfer - Stop a DMA transfer onto / off of the card
+ * @info: interface from which device disconnected from
+ *
+ * Called when we switch away from DATA IN or DATA OUT phases.
+ */
+static void fas216_stoptransfer(FAS216_Info *info)
+{
+ fas216_checkmagic(info);
+
+ if (info->dma.transfer_type == fasdma_real_all ||
+ info->dma.transfer_type == fasdma_real_block)
+ info->dma.stop(info->host, &info->scsi.SCp);
+
+ fas216_cleanuptransfer(info);
+
+ if (info->scsi.phase == PHASE_DATAIN) {
+ unsigned int fifo;
+
+ /*
+ * If we were performing Data-In, then the FIFO counter
+ * contains the number of bytes not transferred via DMA
+ * from the on-board FIFO. Read them manually.
+ */
+ fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ while (fifo && info->scsi.SCp.ptr) {
+ *info->scsi.SCp.ptr = fas216_readb(info, REG_FF);
+ fas216_updateptrs(info, 1);
+ fifo--;
+ }
+ } else {
+ /*
+ * After a Data-Out phase, there may be unsent
+ * bytes left in the FIFO. Flush them out.
+ */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ }
+}
+
+static void fas216_aborttransfer(FAS216_Info *info)
+{
+ fas216_checkmagic(info);
+
+ if (info->dma.transfer_type == fasdma_real_all ||
+ info->dma.transfer_type == fasdma_real_block)
+ info->dma.stop(info->host, &info->scsi.SCp);
+
+ info->dma.transfer_type = fasdma_none;
+ fas216_cmd(info, CMD_FLUSHFIFO);
+}
+
+static void fas216_kick(FAS216_Info *info);
+
+/**
+ * fas216_disconnected_intr - handle device disconnection
+ * @info: interface from which device disconnected from
+ *
+ * Handle device disconnection
+ */
+static void fas216_disconnect_intr(FAS216_Info *info)
+{
+ unsigned long flags;
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_CONNECT, "disconnect phase=%02x",
+ info->scsi.phase);
+
+ msgqueue_flush(&info->scsi.msgs);
+
+ switch (info->scsi.phase) {
+ case PHASE_SELECTION: /* while selecting - no target */
+ case PHASE_SELSTEPS:
+ fas216_done(info, DID_NO_CONNECT);
+ break;
+
+ case PHASE_MSGIN_DISCONNECT: /* message in - disconnecting */
+ info->scsi.disconnectable = 1;
+ info->scsi.phase = PHASE_IDLE;
+ info->stats.disconnects += 1;
+ spin_lock_irqsave(&info->host_lock, flags);
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+ break;
+
+ case PHASE_DONE: /* at end of command - complete */
+ fas216_done(info, DID_OK);
+ break;
+
+ case PHASE_MSGOUT: /* message out - possible ABORT message */
+ if (fas216_get_last_msg(info, info->scsi.msgin_fifo) == ABORT) {
+ info->scsi.aborting = 0;
+ fas216_done(info, DID_ABORT);
+ break;
+ }
+
+ default: /* huh? */
+ printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %s\n",
+ info->host->host_no, fas216_target(info), fas216_drv_phase(info));
+ print_debug_list();
+ fas216_stoptransfer(info);
+ fas216_done(info, DID_ERROR);
+ break;
+ }
+}
+
+/**
+ * fas216_reselected_intr - start reconnection of a device
+ * @info: interface which was reselected
+ *
+ * Start reconnection of a device
+ */
+static void
+fas216_reselected_intr(FAS216_Info *info)
+{
+ unsigned int cfis, i;
+ unsigned char msg[4];
+ unsigned char target, lun, tag;
+
+ fas216_checkmagic(info);
+
+ WARN_ON(info->scsi.phase == PHASE_SELECTION ||
+ info->scsi.phase == PHASE_SELSTEPS);
+
+ cfis = fas216_readb(info, REG_CFIS);
+
+ fas216_log(info, LOG_CONNECT, "reconnect phase=%02x cfis=%02x",
+ info->scsi.phase, cfis);
+
+ cfis &= CFIS_CF;
+
+ if (cfis < 2 || cfis > 4) {
+ printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselect\n",
+ info->host->host_no);
+ goto bad_message;
+ }
+
+ for (i = 0; i < cfis; i++)
+ msg[i] = fas216_readb(info, REG_FF);
+
+ if (!(msg[0] & (1 << info->host->this_id)) ||
+ !(msg[1] & 0x80))
+ goto initiator_error;
+
+ target = msg[0] & ~(1 << info->host->this_id);
+ target = ffs(target) - 1;
+ lun = msg[1] & 7;
+ tag = 0;
+
+ if (cfis >= 3) {
+ if (msg[2] != SIMPLE_QUEUE_TAG)
+ goto initiator_error;
+
+ tag = msg[3];
+ }
+
+ /* set up for synchronous transfers */
+ fas216_writeb(info, REG_SDID, target);
+ fas216_set_sync(info, target);
+ msgqueue_flush(&info->scsi.msgs);
+
+ fas216_log(info, LOG_CONNECT, "Reconnected: target %1x lun %1x tag %02x",
+ target, lun, tag);
+
+ if (info->scsi.disconnectable && info->SCpnt) {
+ info->scsi.disconnectable = 0;
+ if (info->SCpnt->device->id == target &&
+ info->SCpnt->device->lun == lun &&
+ info->SCpnt->tag == tag) {
+ fas216_log(info, LOG_CONNECT, "reconnected previously executing command");
+ } else {
+ queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
+ fas216_log(info, LOG_CONNECT, "had to move command to disconnected queue");
+ info->SCpnt = NULL;
+ }
+ }
+ if (!info->SCpnt) {
+ info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected,
+ target, lun, tag);
+ fas216_log(info, LOG_CONNECT, "had to get command");
+ }
+
+ if (info->SCpnt) {
+ /*
+ * Restore data pointer from SAVED data pointer
+ */
+ info->scsi.SCp = info->SCpnt->SCp;
+
+ fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ info->scsi.phase = PHASE_MSGIN;
+ } else {
+ /*
+ * Our command structure not found - abort the
+ * command on the target. Since we have no
+ * record of this command, we can't send
+ * an INITIATOR DETECTED ERROR message.
+ */
+ fas216_cmd(info, CMD_SETATN);
+
+#if 0
+ if (tag)
+ msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, tag);
+ else
+#endif
+ msgqueue_addmsg(&info->scsi.msgs, 1, ABORT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ info->scsi.aborting = 1;
+ }
+
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+
+ initiator_error:
+ printk(KERN_ERR "scsi%d.H: error during reselection: bytes",
+ info->host->host_no);
+ for (i = 0; i < cfis; i++)
+ printk(" %02x", msg[i]);
+ printk("\n");
+ bad_message:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+}
+
+static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen)
+{
+ int i;
+
+ switch (message[0]) {
+ case COMMAND_COMPLETE:
+ if (msglen != 1)
+ goto unrecognised;
+
+ printk(KERN_ERR "scsi%d.%c: command complete with no "
+ "status in MESSAGE_IN?\n",
+ info->host->host_no, fas216_target(info));
+ break;
+
+ case SAVE_POINTERS:
+ if (msglen != 1)
+ goto unrecognised;
+
+ /*
+ * Save current data pointer to SAVED data pointer
+ * SCSI II standard says that we must not acknowledge
+ * this until we have really saved pointers.
+ * NOTE: we DO NOT save the command nor status pointers
+ * as required by the SCSI II standard. These always
+ * point to the start of their respective areas.
+ */
+ info->SCpnt->SCp = info->scsi.SCp;
+ info->SCpnt->SCp.sent_command = 0;
+ fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
+ "save data pointers: [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ break;
+
+ case RESTORE_POINTERS:
+ if (msglen != 1)
+ goto unrecognised;
+
+ /*
+ * Restore current data pointer from SAVED data pointer
+ */
+ info->scsi.SCp = info->SCpnt->SCp;
+ fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
+ "restore data pointers: [%p, 0x%x]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ break;
+
+ case DISCONNECT:
+ if (msglen != 1)
+ goto unrecognised;
+
+ info->scsi.phase = PHASE_MSGIN_DISCONNECT;
+ break;
+
+ case MESSAGE_REJECT:
+ if (msglen != 1)
+ goto unrecognised;
+
+ switch (fas216_get_last_msg(info, info->scsi.msgin_fifo)) {
+ case EXTENDED_MESSAGE | EXTENDED_SDTR << 8:
+ fas216_handlesync(info, message);
+ break;
+
+ default:
+ fas216_log(info, 0, "reject, last message 0x%04x",
+ fas216_get_last_msg(info, info->scsi.msgin_fifo));
+ }
+ break;
+
+ case NOP:
+ break;
+
+ case EXTENDED_MESSAGE:
+ if (msglen < 3)
+ goto unrecognised;
+
+ switch (message[2]) {
+ case EXTENDED_SDTR: /* Sync transfer negotiation request/reply */
+ fas216_handlesync(info, message);
+ break;
+
+ default:
+ goto unrecognised;
+ }
+ break;
+
+ default:
+ goto unrecognised;
+ }
+ return;
+
+unrecognised:
+ fas216_log(info, 0, "unrecognised message, rejecting");
+ printk("scsi%d.%c: message was", info->host->host_no, fas216_target(info));
+ for (i = 0; i < msglen; i++)
+ printk("%s%02X", i & 31 ? " " : "\n ", message[i]);
+ printk("\n");
+
+ /*
+ * Something strange seems to be happening here -
+ * I can't use SETATN since the chip gives me an
+ * invalid command interrupt when I do. Weird.
+ */
+fas216_cmd(info, CMD_NOP);
+fas216_dumpstate(info);
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+fas216_dumpstate(info);
+}
+
+static int fas216_wait_cmd(FAS216_Info *info, int cmd)
+{
+ int tout;
+ int stat;
+
+ fas216_cmd(info, cmd);
+
+ for (tout = 1000; tout; tout -= 1) {
+ stat = fas216_readb(info, REG_STAT);
+ if (stat & (STAT_INT|STAT_PARITYERROR))
+ break;
+ udelay(1);
+ }
+
+ return stat;
+}
+
+static int fas216_get_msg_byte(FAS216_Info *info)
+{
+ unsigned int stat = fas216_wait_cmd(info, CMD_MSGACCEPTED);
+
+ if ((stat & STAT_INT) == 0)
+ goto timedout;
+
+ if ((stat & STAT_BUSMASK) != STAT_MESGIN)
+ goto unexpected_phase_change;
+
+ fas216_readb(info, REG_INST);
+
+ stat = fas216_wait_cmd(info, CMD_TRANSFERINFO);
+
+ if ((stat & STAT_INT) == 0)
+ goto timedout;
+
+ if (stat & STAT_PARITYERROR)
+ goto parity_error;
+
+ if ((stat & STAT_BUSMASK) != STAT_MESGIN)
+ goto unexpected_phase_change;
+
+ fas216_readb(info, REG_INST);
+
+ return fas216_readb(info, REG_FF);
+
+timedout:
+ fas216_log(info, LOG_ERROR, "timed out waiting for message byte");
+ return -1;
+
+unexpected_phase_change:
+ fas216_log(info, LOG_ERROR, "unexpected phase change: status = %02x", stat);
+ return -2;
+
+parity_error:
+ fas216_log(info, LOG_ERROR, "parity error during message in phase");
+ return -3;
+}
+
+/**
+ * fas216_message - handle a function done interrupt from FAS216 chip
+ * @info: interface which caused function done interrupt
+ *
+ * Handle a function done interrupt from FAS216 chip
+ */
+static void fas216_message(FAS216_Info *info)
+{
+ unsigned char *message = info->scsi.message;
+ unsigned int msglen = 1;
+ int msgbyte = 0;
+
+ fas216_checkmagic(info);
+
+ message[0] = fas216_readb(info, REG_FF);
+
+ if (message[0] == EXTENDED_MESSAGE) {
+ msgbyte = fas216_get_msg_byte(info);
+
+ if (msgbyte >= 0) {
+ message[1] = msgbyte;
+
+ for (msglen = 2; msglen < message[1] + 2; msglen++) {
+ msgbyte = fas216_get_msg_byte(info);
+
+ if (msgbyte >= 0)
+ message[msglen] = msgbyte;
+ else
+ break;
+ }
+ }
+ }
+
+ if (msgbyte == -3)
+ goto parity_error;
+
+#ifdef DEBUG_MESSAGES
+ {
+ int i;
+
+ printk("scsi%d.%c: message in: ",
+ info->host->host_no, fas216_target(info));
+ for (i = 0; i < msglen; i++)
+ printk("%02X ", message[i]);
+ printk("\n");
+ }
+#endif
+
+ fas216_parse_message(info, message, msglen);
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+
+parity_error:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MSG_PARITY_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+}
+
+/**
+ * fas216_send_command - send command after all message bytes have been sent
+ * @info: interface which caused bus service
+ *
+ * Send a command to a target after all message bytes have been sent
+ */
+static void fas216_send_command(FAS216_Info *info)
+{
+ int i;
+
+ fas216_checkmagic(info);
+
+ fas216_cmd(info, CMD_NOP|CMD_WITHDMA);
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load command */
+ for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++)
+ fas216_writeb(info, REG_FF, info->SCpnt->cmnd[i]);
+
+ fas216_cmd(info, CMD_TRANSFERINFO);
+
+ info->scsi.phase = PHASE_COMMAND;
+}
+
+/**
+ * fas216_send_messageout - handle bus service to send a message
+ * @info: interface which caused bus service
+ *
+ * Handle bus service to send a message.
+ * Note: We do not allow the device to change the data direction!
+ */
+static void fas216_send_messageout(FAS216_Info *info, int start)
+{
+ unsigned int tot_msglen = msgqueue_msglength(&info->scsi.msgs);
+
+ fas216_checkmagic(info);
+
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ if (tot_msglen) {
+ struct message *msg;
+ int msgnr = 0;
+
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ int i;
+
+ for (i = start; i < msg->length; i++)
+ fas216_writeb(info, REG_FF, msg->msg[i]);
+
+ msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
+ start = 0;
+ }
+ } else
+ fas216_writeb(info, REG_FF, NOP);
+
+ fas216_cmd(info, CMD_TRANSFERINFO);
+
+ info->scsi.phase = PHASE_MSGOUT;
+}
+
+/**
+ * fas216_busservice_intr - handle bus service interrupt from FAS216 chip
+ * @info: interface which caused bus service interrupt
+ * @stat: Status register contents
+ * @is: SCSI Status register contents
+ *
+ * Handle a bus service interrupt from FAS216 chip
+ */
+static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
+{
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_BUSSERVICE,
+ "bus service: stat=%02x is=%02x phase=%02x",
+ stat, is, info->scsi.phase);
+
+ switch (info->scsi.phase) {
+ case PHASE_SELECTION:
+ if ((is & IS_BITS) != IS_MSGBYTESENT)
+ goto bad_is;
+ break;
+
+ case PHASE_SELSTEPS:
+ switch (is & IS_BITS) {
+ case IS_SELARB:
+ case IS_MSGBYTESENT:
+ goto bad_is;
+
+ case IS_NOTCOMMAND:
+ case IS_EARLYPHASE:
+ if ((stat & STAT_BUSMASK) == STAT_MESGIN)
+ break;
+ goto bad_is;
+
+ case IS_COMPLETE:
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ fas216_cmd(info, CMD_NOP);
+
+#define STATE(st,ph) ((ph) << 3 | (st))
+ /* This table describes the legal SCSI state transitions,
+ * as described by the SCSI II spec.
+ */
+ switch (STATE(stat & STAT_BUSMASK, info->scsi.phase)) {
+ case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> Data In */
+ case STATE(STAT_DATAIN, PHASE_MSGOUT): /* Message Out -> Data In */
+ case STATE(STAT_DATAIN, PHASE_COMMAND): /* Command -> Data In */
+ case STATE(STAT_DATAIN, PHASE_MSGIN): /* Message In -> Data In */
+ info->scsi.phase = PHASE_DATAIN;
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */
+ case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */
+ fas216_cleanuptransfer(info);
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_DATAOUT, PHASE_SELSTEPS):/* Sel w/ steps-> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_MSGOUT): /* Message Out -> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_COMMAND):/* Command -> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_MSGIN): /* Message In -> Data Out */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ info->scsi.phase = PHASE_DATAOUT;
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out -> Status */
+ case STATE(STAT_STATUS, PHASE_DATAIN): /* Data In -> Status */
+ fas216_stoptransfer(info);
+ case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status */
+ case STATE(STAT_STATUS, PHASE_MSGOUT): /* Message Out -> Status */
+ case STATE(STAT_STATUS, PHASE_COMMAND): /* Command -> Status */
+ case STATE(STAT_STATUS, PHASE_MSGIN): /* Message In -> Status */
+ fas216_cmd(info, CMD_INITCMDCOMPLETE);
+ info->scsi.phase = PHASE_STATUS;
+ return;
+
+ case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out -> Message In */
+ case STATE(STAT_MESGIN, PHASE_DATAIN): /* Data In -> Message In */
+ fas216_stoptransfer(info);
+ case STATE(STAT_MESGIN, PHASE_COMMAND): /* Command -> Message In */
+ case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In */
+ case STATE(STAT_MESGIN, PHASE_MSGOUT): /* Message Out -> Message In */
+ info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ info->scsi.phase = PHASE_MSGIN;
+ return;
+
+ case STATE(STAT_MESGIN, PHASE_MSGIN):
+ info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ return;
+
+ case STATE(STAT_COMMAND, PHASE_MSGOUT): /* Message Out -> Command */
+ case STATE(STAT_COMMAND, PHASE_MSGIN): /* Message In -> Command */
+ fas216_send_command(info);
+ info->scsi.phase = PHASE_COMMAND;
+ return;
+
+
+ /*
+ * Selection -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_SELECTION):
+ fas216_send_messageout(info, 1);
+ return;
+
+ /*
+ * Message Out -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_SELSTEPS):
+ case STATE(STAT_MESGOUT, PHASE_MSGOUT):
+ /*
+ * If we get another message out phase, this usually
+ * means some parity error occurred. Resend complete
+ * set of messages. If we have more than one byte to
+ * send, we need to assert ATN again.
+ */
+ if (info->device[info->SCpnt->device->id].parity_check) {
+ /*
+ * We were testing... good, the device
+ * supports parity checking.
+ */
+ info->device[info->SCpnt->device->id].parity_check = 0;
+ info->device[info->SCpnt->device->id].parity_enabled = 1;
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ }
+
+ if (msgqueue_msglength(&info->scsi.msgs) > 1)
+ fas216_cmd(info, CMD_SETATN);
+ /*FALLTHROUGH*/
+
+ /*
+ * Any -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_MSGOUT_EXPECT):
+ fas216_send_messageout(info, 0);
+ return;
+
+ /* Error recovery rules.
+ * These either attempt to abort or retry the operation.
+ * TODO: we need more of these
+ */
+ case STATE(STAT_COMMAND, PHASE_COMMAND):/* Command -> Command */
+ /* error - we've sent out all the command bytes
+ * we have.
+ * NOTE: we need SAVE DATA POINTERS/RESTORE DATA POINTERS
+ * to include the command bytes sent for this to work
+ * correctly.
+ */
+ printk(KERN_ERR "scsi%d.%c: "
+ "target trying to receive more command bytes\n",
+ info->host->host_no, fas216_target(info));
+ fas216_cmd(info, CMD_SETATN);
+ fas216_set_stc(info, 15);
+ fas216_cmd(info, CMD_PADBYTES | CMD_WITHDMA);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ return;
+ }
+
+ if (info->scsi.phase == PHASE_MSGIN_DISCONNECT) {
+ printk(KERN_ERR "scsi%d.%c: disconnect message received, but bus service %s?\n",
+ info->host->host_no, fas216_target(info),
+ fas216_bus_phase(stat));
+ msgqueue_flush(&info->scsi.msgs);
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ info->scsi.aborting = 1;
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ return;
+ }
+ printk(KERN_ERR "scsi%d.%c: bus phase %s after %s?\n",
+ info->host->host_no, fas216_target(info),
+ fas216_bus_phase(stat),
+ fas216_drv_phase(info));
+ print_debug_list();
+ return;
+
+bad_is:
+ fas216_log(info, 0, "bus service at step %d?", is & IS_BITS);
+ fas216_dumpstate(info);
+ print_debug_list();
+
+ fas216_done(info, DID_ERROR);
+}
+
+/**
+ * fas216_funcdone_intr - handle a function done interrupt from FAS216 chip
+ * @info: interface which caused function done interrupt
+ * @stat: Status register contents
+ * @is: SCSI Status register contents
+ *
+ * Handle a function done interrupt from FAS216 chip
+ */
+static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
+{
+ unsigned int fifo_len = fas216_readb(info, REG_CFIS) & CFIS_CF;
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_FUNCTIONDONE,
+ "function done: stat=%02x is=%02x phase=%02x",
+ stat, is, info->scsi.phase);
+
+ switch (info->scsi.phase) {
+ case PHASE_STATUS: /* status phase - read status and msg */
+ if (fifo_len != 2) {
+ fas216_log(info, 0, "odd number of bytes in FIFO: %d", fifo_len);
+ }
+ /*
+ * Read status then message byte.
+ */
+ info->scsi.SCp.Status = fas216_readb(info, REG_FF);
+ info->scsi.SCp.Message = fas216_readb(info, REG_FF);
+ info->scsi.phase = PHASE_DONE;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ break;
+
+ case PHASE_IDLE:
+ case PHASE_SELECTION:
+ case PHASE_SELSTEPS:
+ break;
+
+ case PHASE_MSGIN: /* message in phase */
+ if ((stat & STAT_BUSMASK) == STAT_MESGIN) {
+ info->scsi.msgin_fifo = fifo_len;
+ fas216_message(info);
+ break;
+ }
+
+ default:
+ fas216_log(info, 0, "internal phase %s for function done?"
+ " What do I do with this?",
+ fas216_target(info), fas216_drv_phase(info));
+ }
+}
+
+static void fas216_bus_reset(FAS216_Info *info)
+{
+ neg_t sync_state;
+ int i;
+
+ msgqueue_flush(&info->scsi.msgs);
+
+ sync_state = neg_invalid;
+
+#ifdef SCSI2_SYNC
+ if (info->ifcfg.capabilities & (FASCAP_DMA|FASCAP_PSEUDODMA))
+ sync_state = neg_wait;
+#endif
+
+ info->scsi.phase = PHASE_IDLE;
+ info->SCpnt = NULL; /* bug! */
+ memset(&info->scsi.SCp, 0, sizeof(info->scsi.SCp));
+
+ for (i = 0; i < 8; i++) {
+ info->device[i].disconnect_ok = info->ifcfg.disconnect_ok;
+ info->device[i].sync_state = sync_state;
+ info->device[i].period = info->ifcfg.asyncperiod / 4;
+ info->device[i].stp = info->scsi.async_stp;
+ info->device[i].sof = 0;
+ info->device[i].wide_xfer = 0;
+ }
+
+ info->rst_bus_status = 1;
+ wake_up(&info->eh_wait);
+}
+
+/**
+ * fas216_intr - handle interrupts to progress a command
+ * @info: interface to service
+ *
+ * Handle interrupts from the interface to progress a command
+ */
+irqreturn_t fas216_intr(FAS216_Info *info)
+{
+ unsigned char inst, is, stat;
+ int handled = IRQ_NONE;
+
+ fas216_checkmagic(info);
+
+ stat = fas216_readb(info, REG_STAT);
+ is = fas216_readb(info, REG_IS);
+ inst = fas216_readb(info, REG_INST);
+
+ add_debug_list(stat, is, inst, info->scsi.phase);
+
+ if (stat & STAT_INT) {
+ if (inst & INST_BUSRESET) {
+ fas216_log(info, 0, "bus reset detected");
+ fas216_bus_reset(info);
+ scsi_report_bus_reset(info->host, 0);
+ } else if (inst & INST_ILLEGALCMD) {
+ fas216_log(info, LOG_ERROR, "illegal command given\n");
+ fas216_dumpstate(info);
+ print_debug_list();
+ } else if (inst & INST_DISCONNECT)
+ fas216_disconnect_intr(info);
+ else if (inst & INST_RESELECTED) /* reselected */
+ fas216_reselected_intr(info);
+ else if (inst & INST_BUSSERVICE) /* bus service request */
+ fas216_busservice_intr(info, stat, is);
+ else if (inst & INST_FUNCDONE) /* function done */
+ fas216_funcdone_intr(info, stat, is);
+ else
+ fas216_log(info, 0, "unknown interrupt received:"
+ " phase %s inst %02X is %02X stat %02X",
+ fas216_drv_phase(info), inst, is, stat);
+ handled = IRQ_HANDLED;
+ }
+ return handled;
+}
+
+static void __fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+ int tot_msglen;
+
+ /* following what the ESP driver says */
+ fas216_set_stc(info, 0);
+ fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
+
+ /* flush FIFO */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load bus-id and timeout */
+ fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+
+ /* synchronous transfers */
+ fas216_set_sync(info, SCpnt->device->id);
+
+ tot_msglen = msgqueue_msglength(&info->scsi.msgs);
+
+#ifdef DEBUG_MESSAGES
+ {
+ struct message *msg;
+ int msgnr = 0, i;
+
+ printk("scsi%d.%c: message out: ",
+ info->host->host_no, '0' + SCpnt->device->id);
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ printk("{ ");
+ for (i = 0; i < msg->length; i++)
+ printk("%02x ", msg->msg[i]);
+ printk("} ");
+ }
+ printk("\n");
+ }
+#endif
+
+ if (tot_msglen == 1 || tot_msglen == 3) {
+ /*
+ * We have an easy message length to send...
+ */
+ struct message *msg;
+ int msgnr = 0, i;
+
+ info->scsi.phase = PHASE_SELSTEPS;
+
+ /* load message bytes */
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ for (i = 0; i < msg->length; i++)
+ fas216_writeb(info, REG_FF, msg->msg[i]);
+ msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
+ }
+
+ /* load command */
+ for (i = 0; i < SCpnt->cmd_len; i++)
+ fas216_writeb(info, REG_FF, SCpnt->cmnd[i]);
+
+ if (tot_msglen == 1)
+ fas216_cmd(info, CMD_SELECTATN);
+ else
+ fas216_cmd(info, CMD_SELECTATN3);
+ } else {
+ /*
+ * We have an unusual number of message bytes to send.
+ * Load first byte into fifo, and issue SELECT with ATN and
+ * stop steps.
+ */
+ struct message *msg = msgqueue_getmsg(&info->scsi.msgs, 0);
+
+ fas216_writeb(info, REG_FF, msg->msg[0]);
+ msg->fifo = 1;
+
+ fas216_cmd(info, CMD_SELECTATNSTOP);
+ }
+}
+
+/*
+ * Decide whether we need to perform a parity test on this device.
+ * Can also be used to force parity error conditions during initial
+ * information transfer phase (message out) for test purposes.
+ */
+static int parity_test(FAS216_Info *info, int target)
+{
+#if 0
+ if (target == 3) {
+ info->device[target].parity_check = 0;
+ return 1;
+ }
+#endif
+ return info->device[target].parity_check;
+}
+
+static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+ int disconnect_ok;
+
+ /*
+ * claim host busy
+ */
+ info->scsi.phase = PHASE_SELECTION;
+ info->scsi.SCp = SCpnt->SCp;
+ info->SCpnt = SCpnt;
+ info->dma.transfer_type = fasdma_none;
+
+ if (parity_test(info, SCpnt->device->id))
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_PTE);
+ else
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+
+ /*
+ * Don't allow request sense commands to disconnect.
+ */
+ disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE &&
+ info->device[SCpnt->device->id].disconnect_ok;
+
+ /*
+ * build outgoing message bytes
+ */
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->device->lun));
+
+ /*
+ * add tag message if required
+ */
+ if (SCpnt->tag)
+ msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag);
+
+ do {
+#ifdef SCSI2_SYNC
+ if ((info->device[SCpnt->device->id].sync_state == neg_wait ||
+ info->device[SCpnt->device->id].sync_state == neg_complete) &&
+ (SCpnt->cmnd[0] == REQUEST_SENSE ||
+ SCpnt->cmnd[0] == INQUIRY)) {
+ info->device[SCpnt->device->id].sync_state = neg_inprogress;
+ msgqueue_addmsg(&info->scsi.msgs, 5,
+ EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
+ 1000 / info->ifcfg.clockrate,
+ info->ifcfg.sync_max_depth);
+ break;
+ }
+#endif
+ } while (0);
+
+ __fas216_start_command(info, SCpnt);
+}
+
+static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+#ifdef SCSI2_TAG
+ /*
+ * tagged queuing - allocate a new tag to this command
+ */
+ if (SCpnt->device->simple_tags && SCpnt->cmnd[0] != REQUEST_SENSE &&
+ SCpnt->cmnd[0] != INQUIRY) {
+ 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 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+
+ info->stats.removes += 1;
+ switch (SCpnt->cmnd[0]) {
+ case WRITE_6:
+ case WRITE_10:
+ case WRITE_12:
+ info->stats.writes += 1;
+ break;
+ case READ_6:
+ case READ_10:
+ case READ_12:
+ info->stats.reads += 1;
+ break;
+ default:
+ info->stats.miscs += 1;
+ break;
+ }
+}
+
+static void fas216_do_bus_device_reset(FAS216_Info *info,
+ struct scsi_cmnd *SCpnt)
+{
+ struct message *msg;
+
+ /*
+ * claim host busy
+ */
+ info->scsi.phase = PHASE_SELECTION;
+ info->scsi.SCp = SCpnt->SCp;
+ info->SCpnt = SCpnt;
+ info->dma.transfer_type = fasdma_none;
+
+ fas216_log(info, LOG_ERROR, "sending bus device reset");
+
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, BUS_DEVICE_RESET);
+
+ /* following what the ESP driver says */
+ fas216_set_stc(info, 0);
+ fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
+
+ /* flush FIFO */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load bus-id and timeout */
+ fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+
+ /* synchronous transfers */
+ fas216_set_sync(info, SCpnt->device->id);
+
+ msg = msgqueue_getmsg(&info->scsi.msgs, 0);
+
+ fas216_writeb(info, REG_FF, BUS_DEVICE_RESET);
+ msg->fifo = 1;
+
+ fas216_cmd(info, CMD_SELECTATNSTOP);
+}
+
+/**
+ * fas216_kick - kick a command to the interface
+ * @info: our host interface to kick
+ *
+ * Kick a command to the interface, interface should be idle.
+ * Notes: Interrupts are always disabled!
+ */
+static void fas216_kick(FAS216_Info *info)
+{
+ struct scsi_cmnd *SCpnt = NULL;
+#define TYPE_OTHER 0
+#define TYPE_RESET 1
+#define TYPE_QUEUE 2
+ int where_from = TYPE_OTHER;
+
+ fas216_checkmagic(info);
+
+ /*
+ * Obtain the next command to process.
+ */
+ do {
+ if (info->rstSCpnt) {
+ SCpnt = info->rstSCpnt;
+ /* don't remove it */
+ where_from = TYPE_RESET;
+ break;
+ }
+
+ if (info->reqSCpnt) {
+ SCpnt = info->reqSCpnt;
+ info->reqSCpnt = NULL;
+ break;
+ }
+
+ if (info->origSCpnt) {
+ SCpnt = info->origSCpnt;
+ info->origSCpnt = NULL;
+ break;
+ }
+
+ /* retrieve next command */
+ if (!SCpnt) {
+ SCpnt = queue_remove_exclude(&info->queues.issue,
+ info->busyluns);
+ where_from = TYPE_QUEUE;
+ break;
+ }
+ } while (0);
+
+ if (!SCpnt) {
+ /*
+ * no command pending, so enable reselection.
+ */
+ fas216_cmd(info, CMD_ENABLESEL);
+ return;
+ }
+
+ /*
+ * We're going to start a command, so disable reselection
+ */
+ fas216_cmd(info, CMD_DISABLESEL);
+
+ if (info->scsi.disconnectable && info->SCpnt) {
+ fas216_log(info, LOG_CONNECT,
+ "moved command for %d to disconnected queue",
+ info->SCpnt->device->id);
+ queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
+ info->scsi.disconnectable = 0;
+ info->SCpnt = NULL;
+ }
+
+ fas216_log_command(info, LOG_CONNECT | LOG_MESSAGES, SCpnt,
+ "starting");
+
+ switch (where_from) {
+ case TYPE_QUEUE:
+ fas216_allocate_tag(info, SCpnt);
+ case TYPE_OTHER:
+ fas216_start_command(info, SCpnt);
+ break;
+ case TYPE_RESET:
+ fas216_do_bus_device_reset(info, SCpnt);
+ break;
+ }
+
+ fas216_log(info, LOG_CONNECT, "select: data pointers [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+
+ /*
+ * should now get either DISCONNECT or
+ * (FUNCTION DONE with BUS SERVICE) interrupt
+ */
+}
+
+/*
+ * Clean up from issuing a BUS DEVICE RESET message to a device.
+ */
+static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
+ unsigned int result)
+{
+ fas216_log(info, LOG_ERROR, "fas216 device reset complete");
+
+ info->rstSCpnt = NULL;
+ info->rst_dev_status = 1;
+ wake_up(&info->eh_wait);
+}
+
+/**
+ * fas216_rq_sns_done - Finish processing automatic request sense command
+ * @info: interface that completed
+ * @SCpnt: command that completed
+ * @result: driver byte of result
+ *
+ * Finish processing automatic request sense command
+ */
+static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
+ unsigned int result)
+{
+ fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
+ "request sense complete, result=0x%04x%02x%02x",
+ result, SCpnt->SCp.Message, SCpnt->SCp.Status);
+
+ if (result != DID_OK || SCpnt->SCp.Status != GOOD)
+ /*
+ * Something went wrong. Make sure that we don't
+ * have valid data in the sense buffer that could
+ * confuse the higher levels.
+ */
+ memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
+//printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id);
+//{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); }
+ /*
+ * Note that we don't set SCpnt->result, since that should
+ * reflect the status of the command that we were asked by
+ * the upper layers to process. This would have been set
+ * correctly by fas216_std_done.
+ */
+ scsi_eh_restore_cmnd(SCpnt, &info->ses);
+ SCpnt->scsi_done(SCpnt);
+}
+
+/**
+ * fas216_std_done - finish processing of standard command
+ * @info: interface that completed
+ * @SCpnt: command that completed
+ * @result: driver byte of result
+ *
+ * Finish processing of standard command
+ */
+static void
+fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result)
+{
+ info->stats.fins += 1;
+
+ SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 |
+ info->scsi.SCp.Status;
+
+ fas216_log_command(info, LOG_CONNECT, SCpnt,
+ "command complete, result=0x%08x", SCpnt->result);
+
+ /*
+ * If the driver detected an error, we're all done.
+ */
+ if (host_byte(SCpnt->result) != DID_OK ||
+ msg_byte(SCpnt->result) != COMMAND_COMPLETE)
+ goto done;
+
+ /*
+ * If the command returned CHECK_CONDITION or COMMAND_TERMINATED
+ * status, request the sense information.
+ */
+ if (status_byte(SCpnt->result) == CHECK_CONDITION ||
+ status_byte(SCpnt->result) == COMMAND_TERMINATED)
+ goto request_sense;
+
+ /*
+ * If the command did not complete with GOOD status,
+ * we are all done here.
+ */
+ if (status_byte(SCpnt->result) != GOOD)
+ goto done;
+
+ /*
+ * We have successfully completed a command. Make sure that
+ * we do not have any buffers left to transfer. The world
+ * is not perfect, and we seem to occasionally hit this.
+ * It can be indicative of a buggy driver, target or the upper
+ * levels of the SCSI code.
+ */
+ if (info->scsi.SCp.ptr) {
+ switch (SCpnt->cmnd[0]) {
+ case INQUIRY:
+ case START_STOP:
+ case MODE_SENSE:
+ break;
+
+ default:
+ scmd_printk(KERN_ERR, SCpnt,
+ "incomplete data transfer detected: res=%08X ptr=%p len=%X\n",
+ SCpnt->result, info->scsi.SCp.ptr,
+ info->scsi.SCp.this_residual);
+ scsi_print_command(SCpnt);
+ set_host_byte(SCpnt, DID_ERROR);
+ goto request_sense;
+ }
+ }
+
+done:
+ if (SCpnt->scsi_done) {
+ SCpnt->scsi_done(SCpnt);
+ return;
+ }
+
+ panic("scsi%d.H: null scsi_done function in fas216_done",
+ info->host->host_no);
+
+
+request_sense:
+ if (SCpnt->cmnd[0] == REQUEST_SENSE)
+ goto done;
+
+ scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0);
+ fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
+ "requesting sense");
+ init_SCp(SCpnt);
+ SCpnt->SCp.Message = 0;
+ SCpnt->SCp.Status = 0;
+ SCpnt->tag = 0;
+ SCpnt->host_scribble = (void *)fas216_rq_sns_done;
+
+ /*
+ * Place this command into the high priority "request
+ * sense" slot. This will be the very next command
+ * executed, unless a target connects to us.
+ */
+ if (info->reqSCpnt)
+ printk(KERN_WARNING "scsi%d.%c: losing request command\n",
+ info->host->host_no, '0' + SCpnt->device->id);
+ info->reqSCpnt = SCpnt;
+}
+
+/**
+ * fas216_done - complete processing for current command
+ * @info: interface that completed
+ * @result: driver byte of result
+ *
+ * Complete processing for current command
+ */
+static void fas216_done(FAS216_Info *info, unsigned int result)
+{
+ void (*fn)(FAS216_Info *, struct scsi_cmnd *, unsigned int);
+ struct scsi_cmnd *SCpnt;
+ unsigned long flags;
+
+ fas216_checkmagic(info);
+
+ if (!info->SCpnt)
+ goto no_command;
+
+ SCpnt = info->SCpnt;
+ info->SCpnt = NULL;
+ info->scsi.phase = PHASE_IDLE;
+
+ if (info->scsi.aborting) {
+ fas216_log(info, 0, "uncaught abort - returning DID_ABORT");
+ result = DID_ABORT;
+ info->scsi.aborting = 0;
+ }
+
+ /*
+ * Sanity check the completion - if we have zero bytes left
+ * to transfer, we should not have a valid pointer.
+ */
+ if (info->scsi.SCp.ptr && info->scsi.SCp.this_residual == 0) {
+ scmd_printk(KERN_INFO, SCpnt,
+ "zero bytes left to transfer, but buffer pointer still valid: ptr=%p len=%08x\n",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ info->scsi.SCp.ptr = NULL;
+ scsi_print_command(SCpnt);
+ }
+
+ /*
+ * Clear down this command as completed. If we need to request
+ * the sense information, fas216_kick will re-assert the busy
+ * status.
+ */
+ info->device[SCpnt->device->id].parity_check = 0;
+ clear_bit(SCpnt->device->id * 8 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+
+ fn = (void (*)(FAS216_Info *, struct scsi_cmnd *, unsigned int))SCpnt->host_scribble;
+ fn(info, SCpnt, result);
+
+ if (info->scsi.irq) {
+ spin_lock_irqsave(&info->host_lock, flags);
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+ }
+ return;
+
+no_command:
+ panic("scsi%d.H: null command in fas216_done",
+ info->host->host_no);
+}
+
+/**
+ * fas216_queue_command - queue a command for adapter to process.
+ * @SCpnt: Command to queue
+ * @done: done function to call once command is complete
+ *
+ * Queue a command for adapter to process.
+ * Returns: 0 on success, else error.
+ * Notes: io_request_lock is held, interrupts are disabled.
+ */
+static int fas216_queue_command_lck(struct scsi_cmnd *SCpnt,
+ void (*done)(struct scsi_cmnd *))
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ int result;
+
+ fas216_checkmagic(info);
+
+ fas216_log_command(info, LOG_CONNECT, SCpnt,
+ "received command (%p)", SCpnt);
+
+ SCpnt->scsi_done = done;
+ SCpnt->host_scribble = (void *)fas216_std_done;
+ SCpnt->result = 0;
+
+ init_SCp(SCpnt);
+
+ info->stats.queues += 1;
+ SCpnt->tag = 0;
+
+ spin_lock(&info->host_lock);
+
+ /*
+ * Add command into execute queue and let it complete under
+ * whatever scheme we're using.
+ */
+ result = !queue_add_cmd_ordered(&info->queues.issue, SCpnt);
+
+ /*
+ * If we successfully added the command,
+ * kick the interface to get it moving.
+ */
+ if (result == 0 && info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock(&info->host_lock);
+
+ fas216_log_target(info, LOG_CONNECT, -1, "queue %s",
+ result ? "failure" : "success");
+
+ return result;
+}
+
+DEF_SCSI_QCMD(fas216_queue_command)
+
+/**
+ * fas216_internal_done - trigger restart of a waiting thread in fas216_noqueue_command
+ * @SCpnt: Command to wake
+ *
+ * Trigger restart of a waiting thread in fas216_command
+ */
+static void fas216_internal_done(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ fas216_checkmagic(info);
+
+ info->internal_done = 1;
+}
+
+/**
+ * fas216_noqueue_command - process a command for the adapter.
+ * @SCpnt: Command to queue
+ *
+ * Queue a command for adapter to process.
+ * Returns: scsi result code.
+ * Notes: io_request_lock is held, interrupts are disabled.
+ */
+static int fas216_noqueue_command_lck(struct scsi_cmnd *SCpnt,
+ void (*done)(struct scsi_cmnd *))
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ fas216_checkmagic(info);
+
+ /*
+ * We should only be using this if we don't have an interrupt.
+ * Provide some "incentive" to use the queueing code.
+ */
+ BUG_ON(info->scsi.irq);
+
+ info->internal_done = 0;
+ fas216_queue_command_lck(SCpnt, fas216_internal_done);
+
+ /*
+ * This wastes time, since we can't return until the command is
+ * complete. We can't sleep either since we may get re-entered!
+ * However, we must re-enable interrupts, or else we'll be
+ * waiting forever.
+ */
+ spin_unlock_irq(info->host->host_lock);
+
+ while (!info->internal_done) {
+ /*
+ * If we don't have an IRQ, then we must poll the card for
+ * it's interrupt, and use that to call this driver's
+ * interrupt routine. That way, we keep the command
+ * progressing. Maybe we can add some intelligence here
+ * and go to sleep if we know that the device is going
+ * to be some time (eg, disconnected).
+ */
+ if (fas216_readb(info, REG_STAT) & STAT_INT) {
+ spin_lock_irq(info->host->host_lock);
+ fas216_intr(info);
+ spin_unlock_irq(info->host->host_lock);
+ }
+ }
+
+ spin_lock_irq(info->host->host_lock);
+
+ done(SCpnt);
+
+ return 0;
+}
+
+DEF_SCSI_QCMD(fas216_noqueue_command)
+
+/*
+ * Error handler timeout function. Indicate that we timed out,
+ * and wake up any error handler process so it can continue.
+ */
+static void fas216_eh_timer(unsigned long data)
+{
+ FAS216_Info *info = (FAS216_Info *)data;
+
+ fas216_log(info, LOG_ERROR, "error handling timed out\n");
+
+ del_timer(&info->eh_timer);
+
+ if (info->rst_bus_status == 0)
+ info->rst_bus_status = -1;
+ if (info->rst_dev_status == 0)
+ info->rst_dev_status = -1;
+
+ wake_up(&info->eh_wait);
+}
+
+enum res_find {
+ res_failed, /* not found */
+ res_success, /* command on issue queue */
+ res_hw_abort /* command on disconnected dev */
+};
+
+/**
+ * fas216_do_abort - decide how to abort a command
+ * @SCpnt: command to abort
+ *
+ * Decide how to abort a command.
+ * Returns: abort status
+ */
+static enum res_find fas216_find_command(FAS216_Info *info,
+ struct scsi_cmnd *SCpnt)
+{
+ enum res_find res = res_failed;
+
+ if (queue_remove_cmd(&info->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 device nor the
+ * interface know about the command.
+ */
+ printk("on issue queue ");
+
+ res = res_success;
+ } else if (queue_remove_cmd(&info->queues.disconnected, SCpnt)) {
+ /*
+ * The command was on the disconnected queue. We must
+ * reconnect with the device if possible, and send it
+ * an abort message.
+ */
+ printk("on disconnected queue ");
+
+ res = res_hw_abort;
+ } else if (info->SCpnt == SCpnt) {
+ printk("executing ");
+
+ switch (info->scsi.phase) {
+ /*
+ * If the interface is idle, and the command is 'disconnectable',
+ * then it is the same as on the disconnected queue.
+ */
+ case PHASE_IDLE:
+ if (info->scsi.disconnectable) {
+ info->scsi.disconnectable = 0;
+ info->SCpnt = NULL;
+ res = res_hw_abort;
+ }
+ break;
+
+ default:
+ break;
+ }
+ } else if (info->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.
+ */
+ info->origSCpnt = NULL;
+ clear_bit(SCpnt->device->id * 8 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+ printk("waiting for execution ");
+ res = res_success;
+ } else
+ printk("unknown ");
+
+ return res;
+}
+
+/**
+ * fas216_eh_abort - abort this command
+ * @SCpnt: command to abort
+ *
+ * Abort this command.
+ * Returns: FAILED if unable to abort
+ * Notes: io_request_lock is taken, and irqs are disabled
+ */
+int fas216_eh_abort(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ int result = FAILED;
+
+ fas216_checkmagic(info);
+
+ info->stats.aborts += 1;
+
+ scmd_printk(KERN_WARNING, SCpnt, "abort command\n");
+
+ print_debug_list();
+ fas216_dumpstate(info);
+
+ switch (fas216_find_command(info, SCpnt)) {
+ /*
+ * 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:
+ scmd_printk(KERN_WARNING, SCpnt, "abort %p success\n", SCpnt);
+ result = SUCCESS;
+ break;
+
+ /*
+ * We need to reconnect to the target and send it an
+ * ABORT or ABORT_TAG message. We can only do this
+ * if the bus is free.
+ */
+ case res_hw_abort:
+
+ /*
+ * We are unable to abort the command for some reason.
+ */
+ default:
+ case res_failed:
+ scmd_printk(KERN_WARNING, SCpnt, "abort %p failed\n", SCpnt);
+ break;
+ }
+
+ return result;
+}
+
+/**
+ * fas216_eh_device_reset - Reset the device associated with this command
+ * @SCpnt: command specifing device to reset
+ *
+ * Reset the device associated with this command.
+ * Returns: FAILED if unable to reset.
+ * Notes: We won't be re-entered, so we'll only have one device
+ * reset on the go at one time.
+ */
+int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ unsigned long flags;
+ int i, res = FAILED, target = SCpnt->device->id;
+
+ fas216_log(info, LOG_ERROR, "device reset for target %d", target);
+
+ spin_lock_irqsave(&info->host_lock, flags);
+
+ do {
+ /*
+ * If we are currently connected to a device, and
+ * it is the device we want to reset, there is
+ * nothing we can do here. Chances are it is stuck,
+ * and we need a bus reset.
+ */
+ if (info->SCpnt && !info->scsi.disconnectable &&
+ info->SCpnt->device->id == SCpnt->device->id)
+ break;
+
+ /*
+ * We're going to be resetting this device. Remove
+ * all pending commands from the driver. By doing
+ * so, we guarantee that we won't touch the command
+ * structures except to process the reset request.
+ */
+ queue_remove_all_target(&info->queues.issue, target);
+ queue_remove_all_target(&info->queues.disconnected, target);
+ if (info->origSCpnt && info->origSCpnt->device->id == target)
+ info->origSCpnt = NULL;
+ if (info->reqSCpnt && info->reqSCpnt->device->id == target)
+ info->reqSCpnt = NULL;
+ for (i = 0; i < 8; i++)
+ clear_bit(target * 8 + i, info->busyluns);
+
+ /*
+ * Hijack this SCSI command structure to send
+ * a bus device reset message to this device.
+ */
+ SCpnt->host_scribble = (void *)fas216_devicereset_done;
+
+ info->rst_dev_status = 0;
+ info->rstSCpnt = SCpnt;
+
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+
+ mod_timer(&info->eh_timer, jiffies + 30 * HZ);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ /*
+ * Wait up to 30 seconds for the reset to complete.
+ */
+ wait_event(info->eh_wait, info->rst_dev_status);
+
+ del_timer_sync(&info->eh_timer);
+ spin_lock_irqsave(&info->host_lock, flags);
+ info->rstSCpnt = NULL;
+
+ if (info->rst_dev_status == 1)
+ res = SUCCESS;
+ } while (0);
+
+ SCpnt->host_scribble = NULL;
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ fas216_log(info, LOG_ERROR, "device reset complete: %s\n",
+ res == SUCCESS ? "success" : "failed");
+
+ return res;
+}
+
+/**
+ * fas216_eh_bus_reset - Reset the bus associated with the command
+ * @SCpnt: command specifing bus to reset
+ *
+ * Reset the bus associated with the command.
+ * Returns: FAILED if unable to reset.
+ * Notes: Further commands are blocked.
+ */
+int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ unsigned long flags;
+ struct scsi_device *SDpnt;
+
+ fas216_checkmagic(info);
+ fas216_log(info, LOG_ERROR, "resetting bus");
+
+ info->stats.bus_resets += 1;
+
+ spin_lock_irqsave(&info->host_lock, flags);
+
+ /*
+ * Stop all activity on this interface.
+ */
+ fas216_aborttransfer(info);
+ fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
+
+ /*
+ * Clear any pending interrupts.
+ */
+ while (fas216_readb(info, REG_STAT) & STAT_INT)
+ fas216_readb(info, REG_INST);
+
+ info->rst_bus_status = 0;
+
+ /*
+ * For each attached hard-reset device, clear out
+ * all command structures. Leave the running
+ * command in place.
+ */
+ shost_for_each_device(SDpnt, info->host) {
+ int i;
+
+ if (SDpnt->soft_reset)
+ continue;
+
+ queue_remove_all_target(&info->queues.issue, SDpnt->id);
+ queue_remove_all_target(&info->queues.disconnected, SDpnt->id);
+ if (info->origSCpnt && info->origSCpnt->device->id == SDpnt->id)
+ info->origSCpnt = NULL;
+ if (info->reqSCpnt && info->reqSCpnt->device->id == SDpnt->id)
+ info->reqSCpnt = NULL;
+ info->SCpnt = NULL;
+
+ for (i = 0; i < 8; i++)
+ clear_bit(SDpnt->id * 8 + i, info->busyluns);
+ }
+
+ info->scsi.phase = PHASE_IDLE;
+
+ /*
+ * Reset the SCSI bus. Device cleanup happens in
+ * the interrupt handler.
+ */
+ fas216_cmd(info, CMD_RESETSCSI);
+
+ mod_timer(&info->eh_timer, jiffies + HZ);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ /*
+ * Wait one second for the interrupt.
+ */
+ wait_event(info->eh_wait, info->rst_bus_status);
+ del_timer_sync(&info->eh_timer);
+
+ fas216_log(info, LOG_ERROR, "bus reset complete: %s\n",
+ info->rst_bus_status == 1 ? "success" : "failed");
+
+ return info->rst_bus_status == 1 ? SUCCESS : FAILED;
+}
+
+/**
+ * fas216_init_chip - Initialise FAS216 state after reset
+ * @info: state structure for interface
+ *
+ * Initialise FAS216 state after reset
+ */
+static void fas216_init_chip(FAS216_Info *info)
+{
+ unsigned int clock = ((info->ifcfg.clockrate - 1) / 5 + 1) & 7;
+ fas216_writeb(info, REG_CLKF, clock);
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ fas216_writeb(info, REG_CNTL2, info->scsi.cfg[1]);
+ fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+ fas216_writeb(info, REG_SOF, 0);
+ fas216_writeb(info, REG_STP, info->scsi.async_stp);
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+}
+
+/**
+ * fas216_eh_host_reset - Reset the host associated with this command
+ * @SCpnt: command specifing host to reset
+ *
+ * Reset the host associated with this command.
+ * Returns: FAILED if unable to reset.
+ * Notes: io_request_lock is taken, and irqs are disabled
+ */
+int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ spin_lock_irq(info->host->host_lock);
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_ERROR, "resetting host");
+
+ /*
+ * Reset the SCSI chip.
+ */
+ fas216_cmd(info, CMD_RESETCHIP);
+
+ /*
+ * Ugly ugly ugly!
+ * We need to release the host_lock and enable
+ * IRQs if we sleep, but we must relock and disable
+ * IRQs after the sleep.
+ */
+ spin_unlock_irq(info->host->host_lock);
+ msleep(50 * 1000/100);
+ spin_lock_irq(info->host->host_lock);
+
+ /*
+ * Release the SCSI reset.
+ */
+ fas216_cmd(info, CMD_NOP);
+
+ fas216_init_chip(info);
+
+ spin_unlock_irq(info->host->host_lock);
+ return SUCCESS;
+}
+
+#define TYPE_UNKNOWN 0
+#define TYPE_NCR53C90 1
+#define TYPE_NCR53C90A 2
+#define TYPE_NCR53C9x 3
+#define TYPE_Am53CF94 4
+#define TYPE_EmFAS216 5
+#define TYPE_QLFAS216 6
+
+static char *chip_types[] = {
+ "unknown",
+ "NS NCR53C90",
+ "NS NCR53C90A",
+ "NS NCR53C9x",
+ "AMD Am53CF94",
+ "Emulex FAS216",
+ "QLogic FAS216"
+};
+
+static int fas216_detect_type(FAS216_Info *info)
+{
+ int family, rev;
+
+ /*
+ * Reset the chip.
+ */
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_NOP);
+
+ /*
+ * Check to see if control reg 2 is present.
+ */
+ fas216_writeb(info, REG_CNTL3, 0);
+ fas216_writeb(info, REG_CNTL2, CNTL2_S2FE);
+
+ /*
+ * If we are unable to read back control reg 2
+ * correctly, it is not present, and we have a
+ * NCR53C90.
+ */
+ if ((fas216_readb(info, REG_CNTL2) & (~0xe0)) != CNTL2_S2FE)
+ return TYPE_NCR53C90;
+
+ /*
+ * Now, check control register 3
+ */
+ fas216_writeb(info, REG_CNTL2, 0);
+ fas216_writeb(info, REG_CNTL3, 0);
+ fas216_writeb(info, REG_CNTL3, 5);
+
+ /*
+ * If we are unable to read the register back
+ * correctly, we have a NCR53C90A
+ */
+ if (fas216_readb(info, REG_CNTL3) != 5)
+ return TYPE_NCR53C90A;
+
+ /*
+ * Now read the ID from the chip.
+ */
+ fas216_writeb(info, REG_CNTL3, 0);
+
+ fas216_writeb(info, REG_CNTL3, CNTL3_ADIDCHK);
+ fas216_writeb(info, REG_CNTL3, 0);
+
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_WITHDMA | CMD_NOP);
+
+ fas216_writeb(info, REG_CNTL2, CNTL2_ENF);
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_NOP);
+
+ rev = fas216_readb(info, REG_ID);
+ family = rev >> 3;
+ rev &= 7;
+
+ switch (family) {
+ case 0x01:
+ if (rev == 4)
+ return TYPE_Am53CF94;
+ break;
+
+ case 0x02:
+ switch (rev) {
+ case 2:
+ return TYPE_EmFAS216;
+ case 3:
+ return TYPE_QLFAS216;
+ }
+ break;
+
+ default:
+ break;
+ }
+ printk("family %x rev %x\n", family, rev);
+ return TYPE_NCR53C9x;
+}
+
+/**
+ * fas216_reset_state - Initialise driver internal state
+ * @info: state to initialise
+ *
+ * Initialise driver internal state
+ */
+static void fas216_reset_state(FAS216_Info *info)
+{
+ int i;
+
+ fas216_checkmagic(info);
+
+ fas216_bus_reset(info);
+
+ /*
+ * Clear out all stale info in our state structure
+ */
+ memset(info->busyluns, 0, sizeof(info->busyluns));
+ info->scsi.disconnectable = 0;
+ info->scsi.aborting = 0;
+
+ for (i = 0; i < 8; i++) {
+ info->device[i].parity_enabled = 0;
+ info->device[i].parity_check = 1;
+ }
+
+ /*
+ * Drain all commands on disconnected queue
+ */
+ while (queue_remove(&info->queues.disconnected) != NULL);
+
+ /*
+ * Remove executing commands.
+ */
+ info->SCpnt = NULL;
+ info->reqSCpnt = NULL;
+ info->rstSCpnt = NULL;
+ info->origSCpnt = NULL;
+}
+
+/**
+ * fas216_init - initialise FAS/NCR/AMD SCSI structures.
+ * @host: a driver-specific filled-out structure
+ *
+ * Initialise FAS/NCR/AMD SCSI structures.
+ * Returns: 0 on success
+ */
+int fas216_init(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ info->magic_start = MAGIC;
+ info->magic_end = MAGIC;
+ info->host = host;
+ info->scsi.cfg[0] = host->this_id | CNTL1_PERE;
+ info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE;
+ info->scsi.cfg[2] = info->ifcfg.cntl3 |
+ CNTL3_ADIDCHK | CNTL3_QTAG | CNTL3_G2CB | CNTL3_LBTM;
+ info->scsi.async_stp = fas216_syncperiod(info, info->ifcfg.asyncperiod);
+
+ info->rst_dev_status = -1;
+ info->rst_bus_status = -1;
+ init_waitqueue_head(&info->eh_wait);
+ init_timer(&info->eh_timer);
+ info->eh_timer.data = (unsigned long)info;
+ info->eh_timer.function = fas216_eh_timer;
+
+ spin_lock_init(&info->host_lock);
+
+ memset(&info->stats, 0, sizeof(info->stats));
+
+ msgqueue_initialise(&info->scsi.msgs);
+
+ if (!queue_initialise(&info->queues.issue))
+ return -ENOMEM;
+
+ if (!queue_initialise(&info->queues.disconnected)) {
+ queue_free(&info->queues.issue);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/**
+ * fas216_add - initialise FAS/NCR/AMD SCSI ic.
+ * @host: a driver-specific filled-out structure
+ * @dev: parent device
+ *
+ * Initialise FAS/NCR/AMD SCSI ic.
+ * Returns: 0 on success
+ */
+int fas216_add(struct Scsi_Host *host, struct device *dev)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+ int type, ret;
+
+ if (info->ifcfg.clockrate <= 10 || info->ifcfg.clockrate > 40) {
+ printk(KERN_CRIT "fas216: invalid clock rate %u MHz\n",
+ info->ifcfg.clockrate);
+ return -EINVAL;
+ }
+
+ fas216_reset_state(info);
+ type = fas216_detect_type(info);
+ info->scsi.type = chip_types[type];
+
+ udelay(300);
+
+ /*
+ * Initialise the chip correctly.
+ */
+ fas216_init_chip(info);
+
+ /*
+ * Reset the SCSI bus. We don't want to see
+ * the resulting reset interrupt, so mask it
+ * out.
+ */
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_DISR);
+ fas216_writeb(info, REG_CMD, CMD_RESETSCSI);
+
+ /*
+ * scsi standard says wait 250ms
+ */
+ spin_unlock_irq(info->host->host_lock);
+ msleep(100*1000/100);
+ spin_lock_irq(info->host->host_lock);
+
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ fas216_readb(info, REG_INST);
+
+ fas216_checkmagic(info);
+
+ ret = scsi_add_host(host, dev);
+ if (ret)
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ else
+ scsi_scan_host(host);
+
+ return ret;
+}
+
+void fas216_remove(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ fas216_checkmagic(info);
+ scsi_remove_host(host);
+
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ scsi_host_put(host);
+}
+
+/**
+ * fas216_release - release all resources for FAS/NCR/AMD SCSI ic.
+ * @host: a driver-specific filled-out structure
+ *
+ * release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
+ */
+void fas216_release(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ queue_free(&info->queues.disconnected);
+ queue_free(&info->queues.issue);
+}
+
+void fas216_print_host(FAS216_Info *info, struct seq_file *m)
+{
+ seq_printf(m,
+ "\n"
+ "Chip : %s\n"
+ " Address: 0x%p\n"
+ " IRQ : %d\n"
+ " DMA : %d\n",
+ info->scsi.type, info->scsi.io_base,
+ info->scsi.irq, info->scsi.dma);
+}
+
+void fas216_print_stats(FAS216_Info *info, struct seq_file *m)
+{
+ seq_printf(m, "\n"
+ "Command Statistics:\n"
+ " Queued : %u\n"
+ " Issued : %u\n"
+ " Completed : %u\n"
+ " Reads : %u\n"
+ " Writes : %u\n"
+ " Others : %u\n"
+ " Disconnects: %u\n"
+ " Aborts : %u\n"
+ " Bus resets : %u\n"
+ " Host resets: %u\n",
+ info->stats.queues, info->stats.removes,
+ info->stats.fins, info->stats.reads,
+ info->stats.writes, info->stats.miscs,
+ info->stats.disconnects, info->stats.aborts,
+ info->stats.bus_resets, info->stats.host_resets);
+}
+
+void fas216_print_devices(FAS216_Info *info, struct seq_file *m)
+{
+ struct fas216_device *dev;
+ struct scsi_device *scd;
+
+ seq_puts(m, "Device/Lun TaggedQ Parity Sync\n");
+
+ shost_for_each_device(scd, info->host) {
+ dev = &info->device[scd->id];
+ seq_printf(m, " %d/%llu ", scd->id, scd->lun);
+ if (scd->tagged_supported)
+ seq_printf(m, "%3sabled(%3d) ",
+ scd->simple_tags ? "en" : "dis",
+ scd->current_tag);
+ else
+ seq_puts(m, "unsupported ");
+
+ seq_printf(m, "%3sabled ", dev->parity_enabled ? "en" : "dis");
+
+ if (dev->sof)
+ seq_printf(m, "offset %d, %d ns\n",
+ dev->sof, dev->period * 4);
+ else
+ seq_puts(m, "async\n");
+ }
+}
+
+EXPORT_SYMBOL(fas216_init);
+EXPORT_SYMBOL(fas216_add);
+EXPORT_SYMBOL(fas216_queue_command);
+EXPORT_SYMBOL(fas216_noqueue_command);
+EXPORT_SYMBOL(fas216_intr);
+EXPORT_SYMBOL(fas216_remove);
+EXPORT_SYMBOL(fas216_release);
+EXPORT_SYMBOL(fas216_eh_abort);
+EXPORT_SYMBOL(fas216_eh_device_reset);
+EXPORT_SYMBOL(fas216_eh_bus_reset);
+EXPORT_SYMBOL(fas216_eh_host_reset);
+EXPORT_SYMBOL(fas216_print_host);
+EXPORT_SYMBOL(fas216_print_stats);
+EXPORT_SYMBOL(fas216_print_devices);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/fas216.h b/drivers/scsi/arm/fas216.h
new file mode 100644
index 0000000..c57c16e
--- /dev/null
+++ b/drivers/scsi/arm/fas216.h
@@ -0,0 +1,393 @@
+/*
+ * linux/drivers/acorn/scsi/fas216.h
+ *
+ * Copyright (C) 1997-2000 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.
+ *
+ * FAS216 generic driver
+ */
+#ifndef FAS216_H
+#define FAS216_H
+
+#include <scsi/scsi_eh.h>
+
+#include "queue.h"
+#include "msgqueue.h"
+
+/* FAS register definitions */
+
+/* transfer count low */
+#define REG_CTCL (0)
+#define REG_STCL (0)
+
+/* transfer count medium */
+#define REG_CTCM (1)
+#define REG_STCM (1)
+
+/* fifo data */
+#define REG_FF (2)
+
+/* command */
+#define REG_CMD (3)
+#define CMD_NOP 0x00
+#define CMD_FLUSHFIFO 0x01
+#define CMD_RESETCHIP 0x02
+#define CMD_RESETSCSI 0x03
+
+#define CMD_TRANSFERINFO 0x10
+#define CMD_INITCMDCOMPLETE 0x11
+#define CMD_MSGACCEPTED 0x12
+#define CMD_PADBYTES 0x18
+#define CMD_SETATN 0x1a
+#define CMD_RSETATN 0x1b
+
+#define CMD_SELECTWOATN 0x41
+#define CMD_SELECTATN 0x42
+#define CMD_SELECTATNSTOP 0x43
+#define CMD_ENABLESEL 0x44
+#define CMD_DISABLESEL 0x45
+#define CMD_SELECTATN3 0x46
+#define CMD_RESEL3 0x47
+
+#define CMD_WITHDMA 0x80
+
+/* status register (read) */
+#define REG_STAT (4)
+#define STAT_IO (1 << 0) /* IO phase */
+#define STAT_CD (1 << 1) /* CD phase */
+#define STAT_MSG (1 << 2) /* MSG phase */
+#define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */
+#define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */
+#define STAT_PARITYERROR (1 << 5) /* Parity error */
+#define STAT_REALBAD (1 << 6) /* Something bad */
+#define STAT_INT (1 << 7) /* Interrupt */
+
+#define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO)
+#define STAT_DATAOUT (0) /* Data out */
+#define STAT_DATAIN (STAT_IO) /* Data in */
+#define STAT_COMMAND (STAT_CD) /* Command out */
+#define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */
+#define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */
+#define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */
+
+/* bus ID for select / reselect */
+#define REG_SDID (4)
+#define BUSID(target) ((target) & 7)
+
+/* Interrupt status register (read) */
+#define REG_INST (5)
+#define INST_SELWOATN (1 << 0) /* Select w/o ATN */
+#define INST_SELATN (1 << 1) /* Select w/ATN */
+#define INST_RESELECTED (1 << 2) /* Reselected */
+#define INST_FUNCDONE (1 << 3) /* Function done */
+#define INST_BUSSERVICE (1 << 4) /* Bus service */
+#define INST_DISCONNECT (1 << 5) /* Disconnect */
+#define INST_ILLEGALCMD (1 << 6) /* Illegal command */
+#define INST_BUSRESET (1 << 7) /* SCSI Bus reset */
+
+/* Timeout register (write) */
+#define REG_STIM (5)
+
+/* Sequence step register (read) */
+#define REG_IS (6)
+#define IS_BITS 0x07
+#define IS_SELARB 0x00 /* Select & Arb ok */
+#define IS_MSGBYTESENT 0x01 /* One byte message sent*/
+#define IS_NOTCOMMAND 0x02 /* Not in command state */
+#define IS_EARLYPHASE 0x03 /* Early phase change */
+#define IS_COMPLETE 0x04 /* Command ok */
+#define IS_SOF 0x08 /* Sync off flag */
+
+/* Transfer period step (write) */
+#define REG_STP (6)
+
+/* Synchronous Offset (write) */
+#define REG_SOF (7)
+
+/* Fifo state register (read) */
+#define REG_CFIS (7)
+#define CFIS_CF 0x1f /* Num bytes in FIFO */
+#define CFIS_IS 0xe0 /* Step */
+
+/* config register 1 */
+#define REG_CNTL1 (8)
+#define CNTL1_CID (7 << 0) /* Chip ID */
+#define CNTL1_STE (1 << 3) /* Self test enable */
+#define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */
+#define CNTL1_PTE (1 << 5) /* Parity test enable */
+#define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */
+#define CNTL1_ETM (1 << 7) /* Extended Timing Mode */
+
+/* Clock conversion factor (read) */
+#define REG_CLKF (9)
+#define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */
+#define CLKF_F10MHZ 0x02 /* 10 MHz */
+#define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */
+#define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */
+#define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */
+#define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */
+#define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */
+
+/* Chip test register (write) */
+#define REG_FTM (10)
+#define TEST_FTM 0x01 /* Force target mode */
+#define TEST_FIM 0x02 /* Force initiator mode */
+#define TEST_FHI 0x04 /* Force high impedance mode */
+
+/* Configuration register 2 (read/write) */
+#define REG_CNTL2 (11)
+#define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */
+#define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */
+#define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */
+#define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */
+#define CNTL2_TSDR (1 << 4) /* Tristate DREQ */
+#define CNTL2_SBO (1 << 5) /* Select Byte Order */
+#define CNTL2_ENF (1 << 6) /* Enable features */
+#define CNTL2_DAE (1 << 7) /* Data Alignment Enable */
+
+/* Configuration register 3 (read/write) */
+#define REG_CNTL3 (12)
+#define CNTL3_BS8 (1 << 0) /* Burst size 8 */
+#define CNTL3_MDM (1 << 1) /* Modify DMA mode */
+#define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */
+#define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */
+#define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */
+#define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */
+#define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */
+#define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */
+
+/* High transfer count (read/write) */
+#define REG_CTCH (14)
+#define REG_STCH (14)
+
+/* ID register (read only) */
+#define REG_ID (14)
+
+/* Data alignment */
+#define REG_DAL (15)
+
+typedef enum {
+ PHASE_IDLE, /* we're not planning on doing anything */
+ PHASE_SELECTION, /* selecting a device */
+ PHASE_SELSTEPS, /* selection with command steps */
+ PHASE_COMMAND, /* command sent */
+ PHASE_MESSAGESENT, /* selected, and we're sending cmd */
+ PHASE_DATAOUT, /* data out to device */
+ PHASE_DATAIN, /* data in from device */
+ PHASE_MSGIN, /* message in from device */
+ PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */
+ PHASE_MSGOUT, /* after message out phase */
+ PHASE_MSGOUT_EXPECT, /* expecting message out */
+ PHASE_STATUS, /* status from device */
+ PHASE_DONE /* Command complete */
+} phase_t;
+
+typedef enum {
+ DMA_OUT, /* DMA from memory to chip */
+ DMA_IN /* DMA from chip to memory */
+} fasdmadir_t;
+
+typedef enum {
+ fasdma_none, /* No dma */
+ fasdma_pio, /* PIO mode */
+ fasdma_pseudo, /* Pseudo DMA */
+ fasdma_real_block, /* Real DMA, on block by block basis */
+ fasdma_real_all /* Real DMA, on request by request */
+} fasdmatype_t;
+
+typedef enum {
+ neg_wait, /* Negotiate with device */
+ neg_inprogress, /* Negotiation sent */
+ neg_complete, /* Negotiation complete */
+ neg_targcomplete, /* Target completed negotiation */
+ neg_invalid /* Negotiation not supported */
+} neg_t;
+
+#define MAGIC 0x441296bdUL
+#define NR_MSGS 8
+
+#define FASCAP_DMA (1 << 0)
+#define FASCAP_PSEUDODMA (1 << 1)
+
+typedef struct {
+ unsigned long magic_start;
+ spinlock_t host_lock;
+ struct Scsi_Host *host; /* host */
+ struct scsi_cmnd *SCpnt; /* currently processing command */
+ struct scsi_cmnd *origSCpnt; /* original connecting command */
+ struct scsi_cmnd *reqSCpnt; /* request sense command */
+ struct scsi_cmnd *rstSCpnt; /* reset command */
+ struct scsi_cmnd *pending_SCpnt[8]; /* per-device pending commands */
+ int next_pending; /* next pending device */
+
+ /*
+ * Error recovery
+ */
+ wait_queue_head_t eh_wait;
+ struct timer_list eh_timer;
+ unsigned int rst_dev_status;
+ unsigned int rst_bus_status;
+
+ /* driver information */
+ struct {
+ phase_t phase; /* current phase */
+ void __iomem *io_base; /* iomem base of FAS216 */
+ unsigned int io_shift; /* shift to adjust reg offsets by */
+ unsigned char cfg[4]; /* configuration registers */
+ const char *type; /* chip type */
+ unsigned int irq; /* interrupt */
+ int dma; /* dma channel */
+
+ struct scsi_pointer SCp; /* current commands data pointer */
+
+ MsgQueue_t msgs; /* message queue for connected device */
+
+ unsigned int async_stp; /* Async transfer STP value */
+ unsigned char msgin_fifo; /* bytes in fifo at time of message in */
+ unsigned char message[256]; /* last message received from device */
+
+ unsigned char disconnectable:1; /* this command can be disconnected */
+ unsigned char aborting:1; /* aborting command */
+ } 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 bus_resets;
+ unsigned int host_resets;
+ } stats;
+
+ /* configuration information */
+ struct {
+ unsigned char clockrate; /* clock rate of FAS device (MHz) */
+ unsigned char select_timeout; /* timeout (R5) */
+ unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
+ unsigned char wide_max_size; /* Maximum wide transfer size */
+ unsigned char cntl3; /* Control Reg 3 */
+ unsigned int asyncperiod; /* Async transfer period (ns) */
+ unsigned int capabilities; /* driver capabilities */
+ unsigned int disconnect_ok:1; /* Disconnects allowed? */
+ } ifcfg;
+
+ /* queue handling */
+ struct {
+ Queue_t issue; /* issue queue */
+ Queue_t disconnected; /* disconnected command queue */
+ } queues;
+
+ /* per-device info */
+ struct fas216_device {
+ unsigned char disconnect_ok:1; /* device can disconnect */
+ unsigned char parity_enabled:1; /* parity checking enabled */
+ unsigned char parity_check:1; /* need to check parity checking */
+ unsigned char period; /* sync xfer period in (*4ns) */
+ unsigned char stp; /* synchronous transfer period */
+ unsigned char sof; /* synchronous offset register */
+ unsigned char wide_xfer; /* currently negociated wide transfer */
+ neg_t sync_state; /* synchronous transfer mode */
+ neg_t wide_state; /* wide transfer mode */
+ } device[8];
+ unsigned long busyluns[64/sizeof(unsigned long)];/* array of bits indicating LUNs busy */
+
+ /* dma */
+ struct {
+ fasdmatype_t transfer_type; /* current type of DMA transfer */
+ fasdmatype_t (*setup) (struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
+ void (*pseudo)(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, int transfer);
+ void (*stop) (struct Scsi_Host *host, struct scsi_pointer *SCp);
+ } dma;
+
+ /* miscellaneous */
+ int internal_done; /* flag to indicate request done */
+ struct scsi_eh_save ses; /* holds request sense restore info */
+ unsigned long magic_end;
+} FAS216_Info;
+
+/* Function: int fas216_init (struct Scsi_Host *instance)
+ * Purpose : initialise FAS/NCR/AMD SCSI structures.
+ * Params : instance - a driver-specific filled-out structure
+ * Returns : 0 on success
+ */
+extern int fas216_init (struct Scsi_Host *instance);
+
+/* Function: int fas216_add (struct Scsi_Host *instance, struct device *dev)
+ * Purpose : initialise FAS/NCR/AMD SCSI ic.
+ * Params : instance - a driver-specific filled-out structure
+ * Returns : 0 on success
+ */
+extern int fas216_add (struct Scsi_Host *instance, struct device *dev);
+
+/* Function: int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt)
+ * Purpose : queue a command for adapter to process.
+ * Params : h - host adapter
+ * : SCpnt - Command to queue
+ * Returns : 0 - success, else error
+ */
+extern int fas216_queue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt);
+
+/* Function: int fas216_noqueue_command(struct Scsi_Host *h, struct scsi_cmnd *SCpnt)
+ * Purpose : queue a command for adapter to process, and process it to completion.
+ * Params : h - host adapter
+ * : SCpnt - Command to queue
+ * Returns : 0 - success, else error
+ */
+extern int fas216_noqueue_command(struct Scsi_Host *, struct scsi_cmnd *);
+
+/* Function: irqreturn_t fas216_intr (FAS216_Info *info)
+ * Purpose : handle interrupts from the interface to progress a command
+ * Params : info - interface to service
+ */
+extern irqreturn_t fas216_intr (FAS216_Info *info);
+
+extern void fas216_remove (struct Scsi_Host *instance);
+
+/* Function: void fas216_release (struct Scsi_Host *instance)
+ * Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
+ * Params : instance - a driver-specific filled-out structure
+ * Returns : 0 on success
+ */
+extern void fas216_release (struct Scsi_Host *instance);
+
+extern void fas216_print_host(FAS216_Info *info, struct seq_file *m);
+extern void fas216_print_stats(FAS216_Info *info, struct seq_file *m);
+extern void fas216_print_devices(FAS216_Info *info, struct seq_file *m);
+
+/* Function: int fas216_eh_abort(struct scsi_cmnd *SCpnt)
+ * Purpose : abort this command
+ * Params : SCpnt - command to abort
+ * Returns : FAILED if unable to abort
+ */
+extern int fas216_eh_abort(struct scsi_cmnd *SCpnt);
+
+/* Function: int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
+ * Purpose : Reset the device associated with this command
+ * Params : SCpnt - command specifing device to reset
+ * Returns : FAILED if unable to reset
+ */
+extern int fas216_eh_device_reset(struct scsi_cmnd *SCpnt);
+
+/* Function: int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
+ * Purpose : Reset the complete bus associated with this command
+ * Params : SCpnt - command specifing bus to reset
+ * Returns : FAILED if unable to reset
+ */
+extern int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt);
+
+/* Function: int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
+ * Purpose : Reset the host associated with this command
+ * Params : SCpnt - command specifing host to reset
+ * Returns : FAILED if unable to reset
+ */
+extern int fas216_eh_host_reset(struct scsi_cmnd *SCpnt);
+
+#endif /* FAS216_H */
diff --git a/drivers/scsi/arm/msgqueue.c b/drivers/scsi/arm/msgqueue.c
new file mode 100644
index 0000000..7c95c75
--- /dev/null
+++ b/drivers/scsi/arm/msgqueue.c
@@ -0,0 +1,171 @@
+/*
+ * linux/drivers/acorn/scsi/msgqueue.c
+ *
+ * Copyright (C) 1997-1998 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.
+ *
+ * message queue handling
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/init.h>
+
+#include "msgqueue.h"
+
+/*
+ * Function: struct msgqueue_entry *mqe_alloc(MsgQueue_t *msgq)
+ * Purpose : Allocate a message queue entry
+ * Params : msgq - message queue to claim entry for
+ * Returns : message queue entry or NULL.
+ */
+static struct msgqueue_entry *mqe_alloc(MsgQueue_t *msgq)
+{
+ struct msgqueue_entry *mq;
+
+ if ((mq = msgq->free) != NULL)
+ msgq->free = mq->next;
+
+ return mq;
+}
+
+/*
+ * Function: void mqe_free(MsgQueue_t *msgq, struct msgqueue_entry *mq)
+ * Purpose : free a message queue entry
+ * Params : msgq - message queue to free entry from
+ * mq - message queue entry to free
+ */
+static void mqe_free(MsgQueue_t *msgq, struct msgqueue_entry *mq)
+{
+ if (mq) {
+ mq->next = msgq->free;
+ msgq->free = mq;
+ }
+}
+
+/*
+ * Function: void msgqueue_initialise(MsgQueue_t *msgq)
+ * Purpose : initialise a message queue
+ * Params : msgq - queue to initialise
+ */
+void msgqueue_initialise(MsgQueue_t *msgq)
+{
+ int i;
+
+ msgq->qe = NULL;
+ msgq->free = &msgq->entries[0];
+
+ for (i = 0; i < NR_MESSAGES; i++)
+ msgq->entries[i].next = &msgq->entries[i + 1];
+
+ msgq->entries[NR_MESSAGES - 1].next = NULL;
+}
+
+
+/*
+ * Function: void msgqueue_free(MsgQueue_t *msgq)
+ * Purpose : free a queue
+ * Params : msgq - queue to free
+ */
+void msgqueue_free(MsgQueue_t *msgq)
+{
+}
+
+/*
+ * Function: int msgqueue_msglength(MsgQueue_t *msgq)
+ * Purpose : calculate the total length of all messages on the message queue
+ * Params : msgq - queue to examine
+ * Returns : number of bytes of messages in queue
+ */
+int msgqueue_msglength(MsgQueue_t *msgq)
+{
+ struct msgqueue_entry *mq = msgq->qe;
+ int length = 0;
+
+ for (mq = msgq->qe; mq; mq = mq->next)
+ length += mq->msg.length;
+
+ return length;
+}
+
+/*
+ * Function: struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno)
+ * Purpose : return a message
+ * Params : msgq - queue to obtain message from
+ * : msgno - message number
+ * Returns : pointer to message string, or NULL
+ */
+struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno)
+{
+ struct msgqueue_entry *mq;
+
+ for (mq = msgq->qe; mq && msgno; mq = mq->next, msgno--);
+
+ return mq ? &mq->msg : NULL;
+}
+
+/*
+ * Function: int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...)
+ * Purpose : add a message onto a message queue
+ * Params : msgq - queue to add message on
+ * length - length of message
+ * ... - message bytes
+ * Returns : != 0 if successful
+ */
+int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...)
+{
+ struct msgqueue_entry *mq = mqe_alloc(msgq);
+ va_list ap;
+
+ if (mq) {
+ struct msgqueue_entry **mqp;
+ int i;
+
+ va_start(ap, length);
+ for (i = 0; i < length; i++)
+ mq->msg.msg[i] = va_arg(ap, unsigned int);
+ va_end(ap);
+
+ mq->msg.length = length;
+ mq->msg.fifo = 0;
+ mq->next = NULL;
+
+ mqp = &msgq->qe;
+ while (*mqp)
+ mqp = &(*mqp)->next;
+
+ *mqp = mq;
+ }
+
+ return mq != NULL;
+}
+
+/*
+ * Function: void msgqueue_flush(MsgQueue_t *msgq)
+ * Purpose : flush all messages from message queue
+ * Params : msgq - queue to flush
+ */
+void msgqueue_flush(MsgQueue_t *msgq)
+{
+ struct msgqueue_entry *mq, *mqnext;
+
+ for (mq = msgq->qe; mq; mq = mqnext) {
+ mqnext = mq->next;
+ mqe_free(msgq, mq);
+ }
+ msgq->qe = NULL;
+}
+
+EXPORT_SYMBOL(msgqueue_initialise);
+EXPORT_SYMBOL(msgqueue_free);
+EXPORT_SYMBOL(msgqueue_msglength);
+EXPORT_SYMBOL(msgqueue_getmsg);
+EXPORT_SYMBOL(msgqueue_addmsg);
+EXPORT_SYMBOL(msgqueue_flush);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("SCSI message queue handling");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/msgqueue.h b/drivers/scsi/arm/msgqueue.h
new file mode 100644
index 0000000..41c7333
--- /dev/null
+++ b/drivers/scsi/arm/msgqueue.h
@@ -0,0 +1,82 @@
+/*
+ * linux/drivers/acorn/scsi/msgqueue.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.
+ *
+ * message queue handling
+ */
+#ifndef MSGQUEUE_H
+#define MSGQUEUE_H
+
+struct message {
+ char msg[8];
+ int length;
+ int fifo;
+};
+
+struct msgqueue_entry {
+ struct message msg;
+ struct msgqueue_entry *next;
+};
+
+#define NR_MESSAGES 4
+
+typedef struct {
+ struct msgqueue_entry *qe;
+ struct msgqueue_entry *free;
+ struct msgqueue_entry entries[NR_MESSAGES];
+} MsgQueue_t;
+
+/*
+ * Function: void msgqueue_initialise(MsgQueue_t *msgq)
+ * Purpose : initialise a message queue
+ * Params : msgq - queue to initialise
+ */
+extern void msgqueue_initialise(MsgQueue_t *msgq);
+
+/*
+ * Function: void msgqueue_free(MsgQueue_t *msgq)
+ * Purpose : free a queue
+ * Params : msgq - queue to free
+ */
+extern void msgqueue_free(MsgQueue_t *msgq);
+
+/*
+ * Function: int msgqueue_msglength(MsgQueue_t *msgq)
+ * Purpose : calculate the total length of all messages on the message queue
+ * Params : msgq - queue to examine
+ * Returns : number of bytes of messages in queue
+ */
+extern int msgqueue_msglength(MsgQueue_t *msgq);
+
+/*
+ * Function: struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno)
+ * Purpose : return a message & its length
+ * Params : msgq - queue to obtain message from
+ * : msgno - message number
+ * Returns : pointer to message string, or NULL
+ */
+extern struct message *msgqueue_getmsg(MsgQueue_t *msgq, int msgno);
+
+/*
+ * Function: int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...)
+ * Purpose : add a message onto a message queue
+ * Params : msgq - queue to add message on
+ * length - length of message
+ * ... - message bytes
+ * Returns : != 0 if successful
+ */
+extern int msgqueue_addmsg(MsgQueue_t *msgq, int length, ...);
+
+/*
+ * Function: void msgqueue_flush(MsgQueue_t *msgq)
+ * Purpose : flush all messages from message queue
+ * Params : msgq - queue to flush
+ */
+extern void msgqueue_flush(MsgQueue_t *msgq);
+
+#endif
diff --git a/drivers/scsi/arm/oak.c b/drivers/scsi/arm/oak.c
new file mode 100644
index 0000000..7c6fa14
--- /dev/null
+++ b/drivers/scsi/arm/oak.c
@@ -0,0 +1,207 @@
+/*
+ * Oak Generic NCR5380 driver
+ *
+ * Copyright 1995-2002, Russell King
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+#include <scsi/scsi_host.h>
+
+/*#define PSEUDO_DMA*/
+#define DONT_USE_INTR
+
+#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
+#define NCR5380_local_declare() void __iomem *_base
+#define NCR5380_setup(host) _base = priv(host)->base
+
+#define NCR5380_read(reg) readb(_base + ((reg) << 2))
+#define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2))
+#define NCR5380_queue_command oakscsi_queue_command
+#define NCR5380_info oakscsi_info
+#define NCR5380_show_info oakscsi_show_info
+
+#define NCR5380_implementation_fields \
+ void __iomem *base
+
+#include "../NCR5380.h"
+
+#undef START_DMA_INITIATOR_RECEIVE_REG
+#define START_DMA_INITIATOR_RECEIVE_REG (128 + 7)
+
+#define STAT ((128 + 16) << 2)
+#define DATA ((128 + 8) << 2)
+
+static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
+ int len)
+{
+ void __iomem *base = priv(instance)->base;
+
+printk("writing %p len %d\n",addr, len);
+ if(!len) return -1;
+
+ while(1)
+ {
+ int status;
+ while (((status = readw(base + STAT)) & 0x100)==0);
+ }
+}
+
+static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr,
+ int len)
+{
+ void __iomem *base = priv(instance)->base;
+printk("reading %p len %d\n", addr, len);
+ while(len > 0)
+ {
+ unsigned int status, timeout;
+ unsigned long b;
+
+ timeout = 0x01FFFFFF;
+
+ while (((status = readw(base + STAT)) & 0x100)==0)
+ {
+ timeout--;
+ if(status & 0x200 || !timeout)
+ {
+ printk("status = %08X\n", status);
+ return 1;
+ }
+ }
+
+ if(len >= 128)
+ {
+ readsw(base + DATA, addr, 128);
+ addr += 128;
+ len -= 128;
+ }
+ else
+ {
+ b = (unsigned long) readw(base + DATA);
+ *addr ++ = b;
+ len -= 1;
+ if(len)
+ *addr ++ = b>>8;
+ len -= 1;
+ }
+ }
+ return 0;
+}
+
+#undef STAT
+#undef DATA
+
+#include "../NCR5380.c"
+
+static struct scsi_host_template oakscsi_template = {
+ .module = THIS_MODULE,
+ .show_info = oakscsi_show_info,
+ .name = "Oak 16-bit SCSI",
+ .info = oakscsi_info,
+ .queuecommand = oakscsi_queue_command,
+ .eh_abort_handler = NCR5380_abort,
+ .eh_bus_reset_handler = NCR5380_bus_reset,
+ .can_queue = 16,
+ .this_id = 7,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 2,
+ .use_clustering = DISABLE_CLUSTERING,
+ .proc_name = "oakscsi",
+};
+
+static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ int ret = -ENOMEM;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata));
+ if (!host) {
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
+ ecard_resource_len(ec, ECARD_RES_MEMC));
+ if (!priv(host)->base) {
+ ret = -ENOMEM;
+ goto unreg;
+ }
+
+ host->irq = NO_IRQ;
+ host->n_io_port = 255;
+
+ NCR5380_init(host, 0);
+
+ ret = scsi_add_host(host, &ec->dev);
+ if (ret)
+ goto out_unmap;
+
+ scsi_scan_host(host);
+ goto out;
+
+ out_unmap:
+ iounmap(priv(host)->base);
+ unreg:
+ scsi_host_put(host);
+ release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void oakscsi_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+ scsi_remove_host(host);
+
+ NCR5380_exit(host);
+ iounmap(priv(host)->base);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id oakscsi_cids[] = {
+ { MANU_OAK, PROD_OAK_SCSI },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver oakscsi_driver = {
+ .probe = oakscsi_probe,
+ .remove = oakscsi_remove,
+ .id_table = oakscsi_cids,
+ .drv = {
+ .name = "oakscsi",
+ },
+};
+
+static int __init oakscsi_init(void)
+{
+ return ecard_register_driver(&oakscsi_driver);
+}
+
+static void __exit oakscsi_exit(void)
+{
+ ecard_remove_driver(&oakscsi_driver);
+}
+
+module_init(oakscsi_init);
+module_exit(oakscsi_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Oak SCSI driver");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c
new file mode 100644
index 0000000..5e1b73e
--- /dev/null
+++ b/drivers/scsi/arm/powertec.c
@@ -0,0 +1,451 @@
+/*
+ * linux/drivers/acorn/scsi/powertec.c
+ *
+ * Copyright (C) 1997-2005 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.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+#include "scsi.h"
+
+#include <scsi/scsicam.h>
+
+#define POWERTEC_FAS216_OFFSET 0x3000
+#define POWERTEC_FAS216_SHIFT 6
+
+#define POWERTEC_INTR_STATUS 0x2000
+#define POWERTEC_INTR_BIT 0x80
+
+#define POWERTEC_RESET_CONTROL 0x1018
+#define POWERTEC_RESET_BIT 1
+
+#define POWERTEC_TERM_CONTROL 0x2018
+#define POWERTEC_TERM_ENABLE 1
+
+#define POWERTEC_INTR_CONTROL 0x101c
+#define POWERTEC_INTR_ENABLE 1
+#define POWERTEC_INTR_DISABLE 0
+
+#define VERSION "1.10 (19/01/2003 2.5.59)"
+
+/*
+ * Use term=0,1,0,0,0 to turn terminators on/off.
+ * One entry per slot.
+ */
+static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
+
+#define NR_SG 256
+
+struct powertec_info {
+ FAS216_Info info;
+ struct expansion_card *ec;
+ void __iomem *base;
+ unsigned int term_ctl;
+ struct scatterlist sg[NR_SG];
+};
+
+/* Prototype: void powertecscsi_irqenable(ec, irqnr)
+ * Purpose : Enable interrupts on Powertec SCSI card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+powertecscsi_irqenable(struct expansion_card *ec, int irqnr)
+{
+ struct powertec_info *info = ec->irq_data;
+ writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL);
+}
+
+/* Prototype: void powertecscsi_irqdisable(ec, irqnr)
+ * Purpose : Disable interrupts on Powertec SCSI card
+ * Params : ec - expansion card structure
+ * : irqnr - interrupt number
+ */
+static void
+powertecscsi_irqdisable(struct expansion_card *ec, int irqnr)
+{
+ struct powertec_info *info = ec->irq_data;
+ writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL);
+}
+
+static const expansioncard_ops_t powertecscsi_ops = {
+ .irqenable = powertecscsi_irqenable,
+ .irqdisable = powertecscsi_irqdisable,
+};
+
+/* Prototype: void powertecscsi_terminator_ctl(host, on_off)
+ * Purpose : Turn the Powertec SCSI terminators on or off
+ * Params : host - card to turn on/off
+ * : on_off - !0 to turn on, 0 to turn off
+ */
+static void
+powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off)
+{
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+
+ info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0;
+ writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL);
+}
+
+/* Prototype: void powertecscsi_intr(irq, *dev_id, *regs)
+ * Purpose : handle interrupts from Powertec SCSI card
+ * Params : irq - interrupt number
+ * dev_id - user-defined (Scsi_Host structure)
+ */
+static irqreturn_t powertecscsi_intr(int irq, void *dev_id)
+{
+ struct powertec_info *info = dev_id;
+
+ return fas216_intr(&info->info);
+}
+
+/* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose : initialises DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ * direction - DMA on to/off of card
+ * min_type - minimum DMA support that we must have for this transfer
+ * Returns : type of transfer to be performed
+ */
+static fasdmatype_t
+powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
+ fasdmadir_t direction, fasdmatype_t min_type)
+{
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+ struct device *dev = scsi_get_device(host);
+ int dmach = info->info.scsi.dma;
+
+ if (info->info.ifcfg.capabilities & FASCAP_DMA &&
+ min_type == fasdma_real_all) {
+ int bufs, map_dir, dma_dir;
+
+ bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
+
+ if (direction == DMA_OUT)
+ map_dir = DMA_TO_DEVICE,
+ dma_dir = DMA_MODE_WRITE;
+ else
+ map_dir = DMA_FROM_DEVICE,
+ dma_dir = DMA_MODE_READ;
+
+ dma_map_sg(dev, info->sg, bufs, map_dir);
+
+ disable_dma(dmach);
+ set_dma_sg(dmach, info->sg, bufs);
+ set_dma_mode(dmach, dma_dir);
+ enable_dma(dmach);
+ return fasdma_real_all;
+ }
+
+ /*
+ * If we're not doing DMA,
+ * we'll do slow PIO
+ */
+ return fasdma_pio;
+}
+
+/* Prototype: int powertecscsi_dma_stop(host, SCpnt)
+ * Purpose : stops DMA/PIO
+ * Params : host - host
+ * SCpnt - command
+ */
+static void
+powertecscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
+{
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+ if (info->info.scsi.dma != NO_DMA)
+ disable_dma(info->info.scsi.dma);
+}
+
+/* Prototype: const char *powertecscsi_info(struct Scsi_Host * host)
+ * Purpose : returns a descriptive string about this interface,
+ * Params : host - driver host structure to return info for.
+ * Returns : pointer to a static buffer containing null terminated string.
+ */
+const char *powertecscsi_info(struct Scsi_Host *host)
+{
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+ static char string[150];
+
+ sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
+ host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+ VERSION, info->term_ctl ? "n" : "ff");
+
+ return string;
+}
+
+/* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+ * Purpose : Set a driver specific function
+ * Params : host - host to setup
+ * : buffer - buffer containing string describing operation
+ * : length - length of string
+ * Returns : -EINVAL, or 0
+ */
+static int
+powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+{
+ int ret = length;
+
+ if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) {
+ buffer += 12;
+ length -= 12;
+
+ if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
+ if (buffer[5] == '1')
+ powertecscsi_terminator_ctl(host, 1);
+ else if (buffer[5] == '0')
+ powertecscsi_terminator_ctl(host, 0);
+ else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+ } else
+ ret = -EINVAL;
+
+ return ret;
+}
+
+/* Prototype: int powertecscsi_proc_info(char *buffer, char **start, off_t offset,
+ * int length, int host_no, int inout)
+ * Purpose : Return information about the driver to a user process accessing
+ * the /proc filesystem.
+ * Params : buffer - a buffer to write information to
+ * start - a pointer into this buffer set by this routine to the start
+ * of the required information.
+ * offset - offset into information that we have read up to.
+ * length - length of buffer
+ * inout - 0 for reading, 1 for writing.
+ * Returns : length of data written to buffer.
+ */
+static int powertecscsi_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+ struct powertec_info *info;
+
+ info = (struct powertec_info *)host->hostdata;
+
+ seq_printf(m, "PowerTec SCSI driver v%s\n", VERSION);
+ fas216_print_host(&info->info, m);
+ seq_printf(m, "Term : o%s\n",
+ info->term_ctl ? "n" : "ff");
+
+ fas216_print_stats(&info->info, m);
+ fas216_print_devices(&info->info, m);
+ return 0;
+}
+
+static ssize_t powertecscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+
+ return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);
+}
+
+static ssize_t
+powertecscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct expansion_card *ec = ECARD_DEV(dev);
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+
+ if (len > 1)
+ powertecscsi_terminator_ctl(host, buf[0] != '0');
+
+ return len;
+}
+
+static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
+ powertecscsi_show_term, powertecscsi_store_term);
+
+static struct scsi_host_template powertecscsi_template = {
+ .module = THIS_MODULE,
+ .show_info = powertecscsi_show_info,
+ .write_info = powertecscsi_set_proc_info,
+ .name = "PowerTec SCSI",
+ .info = powertecscsi_info,
+ .queuecommand = fas216_queue_command,
+ .eh_host_reset_handler = fas216_eh_host_reset,
+ .eh_bus_reset_handler = fas216_eh_bus_reset,
+ .eh_device_reset_handler = fas216_eh_device_reset,
+ .eh_abort_handler = fas216_eh_abort,
+
+ .can_queue = 8,
+ .this_id = 7,
+ .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
+ .dma_boundary = IOMD_DMA_BOUNDARY,
+ .cmd_per_lun = 2,
+ .use_clustering = ENABLE_CLUSTERING,
+ .proc_name = "powertec",
+};
+
+static int powertecscsi_probe(struct expansion_card *ec,
+ const struct ecard_id *id)
+{
+ struct Scsi_Host *host;
+ struct powertec_info *info;
+ void __iomem *base;
+ int ret;
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+ if (!base) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ host = scsi_host_alloc(&powertecscsi_template,
+ sizeof (struct powertec_info));
+ if (!host) {
+ ret = -ENOMEM;
+ goto out_region;
+ }
+
+ ecard_set_drvdata(ec, host);
+
+ info = (struct powertec_info *)host->hostdata;
+ info->base = base;
+ powertecscsi_terminator_ctl(host, term[ec->slot_no]);
+
+ info->ec = ec;
+ info->info.scsi.io_base = base + POWERTEC_FAS216_OFFSET;
+ info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT;
+ info->info.scsi.irq = ec->irq;
+ info->info.scsi.dma = ec->dma;
+ info->info.ifcfg.clockrate = 40; /* MHz */
+ info->info.ifcfg.select_timeout = 255;
+ info->info.ifcfg.asyncperiod = 200; /* ns */
+ info->info.ifcfg.sync_max_depth = 7;
+ info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
+ info->info.ifcfg.disconnect_ok = 1;
+ info->info.ifcfg.wide_max_size = 0;
+ info->info.ifcfg.capabilities = 0;
+ info->info.dma.setup = powertecscsi_dma_setup;
+ info->info.dma.pseudo = NULL;
+ info->info.dma.stop = powertecscsi_dma_stop;
+
+ ec->irqaddr = base + POWERTEC_INTR_STATUS;
+ ec->irqmask = POWERTEC_INTR_BIT;
+
+ ecard_setirq(ec, &powertecscsi_ops, info);
+
+ device_create_file(&ec->dev, &dev_attr_bus_term);
+
+ ret = fas216_init(host);
+ if (ret)
+ goto out_free;
+
+ ret = request_irq(ec->irq, powertecscsi_intr,
+ 0, "powertec", info);
+ if (ret) {
+ printk("scsi%d: IRQ%d not free: %d\n",
+ host->host_no, ec->irq, ret);
+ goto out_release;
+ }
+
+ if (info->info.scsi.dma != NO_DMA) {
+ if (request_dma(info->info.scsi.dma, "powertec")) {
+ printk("scsi%d: DMA%d not free, using PIO\n",
+ host->host_no, info->info.scsi.dma);
+ info->info.scsi.dma = NO_DMA;
+ } else {
+ set_dma_speed(info->info.scsi.dma, 180);
+ info->info.ifcfg.capabilities |= FASCAP_DMA;
+ }
+ }
+
+ ret = fas216_add(host, &ec->dev);
+ if (ret == 0)
+ goto out;
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, host);
+
+ out_release:
+ fas216_release(host);
+
+ out_free:
+ device_remove_file(&ec->dev, &dev_attr_bus_term);
+ scsi_host_put(host);
+
+ out_region:
+ ecard_release_resources(ec);
+
+ out:
+ return ret;
+}
+
+static void powertecscsi_remove(struct expansion_card *ec)
+{
+ struct Scsi_Host *host = ecard_get_drvdata(ec);
+ struct powertec_info *info = (struct powertec_info *)host->hostdata;
+
+ ecard_set_drvdata(ec, NULL);
+ fas216_remove(host);
+
+ device_remove_file(&ec->dev, &dev_attr_bus_term);
+
+ if (info->info.scsi.dma != NO_DMA)
+ free_dma(info->info.scsi.dma);
+ free_irq(ec->irq, info);
+
+ fas216_release(host);
+ scsi_host_put(host);
+ ecard_release_resources(ec);
+}
+
+static const struct ecard_id powertecscsi_cids[] = {
+ { MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI },
+ { 0xffff, 0xffff },
+};
+
+static struct ecard_driver powertecscsi_driver = {
+ .probe = powertecscsi_probe,
+ .remove = powertecscsi_remove,
+ .id_table = powertecscsi_cids,
+ .drv = {
+ .name = "powertecscsi",
+ },
+};
+
+static int __init powertecscsi_init(void)
+{
+ return ecard_register_driver(&powertecscsi_driver);
+}
+
+static void __exit powertecscsi_exit(void)
+{
+ ecard_remove_driver(&powertecscsi_driver);
+}
+
+module_init(powertecscsi_init);
+module_exit(powertecscsi_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Powertec SCSI driver");
+module_param_array(term, int, NULL, 0);
+MODULE_PARM_DESC(term, "SCSI bus termination");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/queue.c b/drivers/scsi/arm/queue.c
new file mode 100644
index 0000000..3441ce3
--- /dev/null
+++ b/drivers/scsi/arm/queue.c
@@ -0,0 +1,318 @@
+/*
+ * linux/drivers/acorn/scsi/queue.c: queue handling primitives
+ *
+ * Copyright (C) 1997-2000 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.
+ *
+ * Changelog:
+ * 15-Sep-1997 RMK Created.
+ * 11-Oct-1997 RMK Corrected problem with queue_remove_exclude
+ * not updating internal linked list properly
+ * (was causing commands to go missing).
+ * 30-Aug-2000 RMK Use Linux list handling and spinlocks
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/init.h>
+
+#include "../scsi.h"
+
+#define DEBUG
+
+typedef struct queue_entry {
+ struct list_head list;
+ struct scsi_cmnd *SCpnt;
+#ifdef DEBUG
+ unsigned long magic;
+#endif
+} QE_t;
+
+#ifdef DEBUG
+#define QUEUE_MAGIC_FREE 0xf7e1c9a3
+#define QUEUE_MAGIC_USED 0xf7e1cc33
+
+#define SET_MAGIC(q,m) ((q)->magic = (m))
+#define BAD_MAGIC(q,m) ((q)->magic != (m))
+#else
+#define SET_MAGIC(q,m) do { } while (0)
+#define BAD_MAGIC(q,m) (0)
+#endif
+
+#include "queue.h"
+
+#define NR_QE 32
+
+/*
+ * Function: void queue_initialise (Queue_t *queue)
+ * Purpose : initialise a queue
+ * Params : queue - queue to initialise
+ */
+int queue_initialise (Queue_t *queue)
+{
+ unsigned int nqueues = NR_QE;
+ QE_t *q;
+
+ spin_lock_init(&queue->queue_lock);
+ INIT_LIST_HEAD(&queue->head);
+ INIT_LIST_HEAD(&queue->free);
+
+ /*
+ * If life was easier, then SCpnt would have a
+ * host-available list head, and we wouldn't
+ * need to keep free lists or allocate this
+ * memory.
+ */
+ queue->alloc = q = kmalloc(sizeof(QE_t) * nqueues, GFP_KERNEL);
+ if (q) {
+ for (; nqueues; q++, nqueues--) {
+ SET_MAGIC(q, QUEUE_MAGIC_FREE);
+ q->SCpnt = NULL;
+ list_add(&q->list, &queue->free);
+ }
+ }
+
+ return queue->alloc != NULL;
+}
+
+/*
+ * Function: void queue_free (Queue_t *queue)
+ * Purpose : free a queue
+ * Params : queue - queue to free
+ */
+void queue_free (Queue_t *queue)
+{
+ if (!list_empty(&queue->head))
+ printk(KERN_WARNING "freeing non-empty queue %p\n", queue);
+ kfree(queue->alloc);
+}
+
+
+/*
+ * Function: int __queue_add(Queue_t *queue, struct scsi_cmnd *SCpnt, int head)
+ * Purpose : Add a new command onto a queue, adding REQUEST_SENSE to head.
+ * Params : queue - destination queue
+ * SCpnt - command to add
+ * head - add command to head of queue
+ * Returns : 0 on error, !0 on success
+ */
+int __queue_add(Queue_t *queue, struct scsi_cmnd *SCpnt, int head)
+{
+ unsigned long flags;
+ struct list_head *l;
+ QE_t *q;
+ int ret = 0;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ if (list_empty(&queue->free))
+ goto empty;
+
+ l = queue->free.next;
+ list_del(l);
+
+ q = list_entry(l, QE_t, list);
+ BUG_ON(BAD_MAGIC(q, QUEUE_MAGIC_FREE));
+
+ SET_MAGIC(q, QUEUE_MAGIC_USED);
+ q->SCpnt = SCpnt;
+
+ if (head)
+ list_add(l, &queue->head);
+ else
+ list_add_tail(l, &queue->head);
+
+ ret = 1;
+empty:
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+ return ret;
+}
+
+static struct scsi_cmnd *__queue_remove(Queue_t *queue, struct list_head *ent)
+{
+ QE_t *q;
+
+ /*
+ * Move the entry from the "used" list onto the "free" list
+ */
+ list_del(ent);
+ q = list_entry(ent, QE_t, list);
+ BUG_ON(BAD_MAGIC(q, QUEUE_MAGIC_USED));
+
+ SET_MAGIC(q, QUEUE_MAGIC_FREE);
+ list_add(ent, &queue->free);
+
+ return q->SCpnt;
+}
+
+/*
+ * Function: struct scsi_cmnd *queue_remove_exclude (queue, exclude)
+ * Purpose : remove a SCSI command from a queue
+ * Params : queue - queue to remove command from
+ * exclude - bit array of target&lun which is busy
+ * Returns : struct scsi_cmnd if successful (and a reference), or NULL if no command available
+ */
+struct scsi_cmnd *queue_remove_exclude(Queue_t *queue, unsigned long *exclude)
+{
+ unsigned long flags;
+ struct list_head *l;
+ struct scsi_cmnd *SCpnt = NULL;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ list_for_each(l, &queue->head) {
+ QE_t *q = list_entry(l, QE_t, list);
+ if (!test_bit(q->SCpnt->device->id * 8 +
+ (u8)(q->SCpnt->device->lun & 0x7), exclude)) {
+ SCpnt = __queue_remove(queue, l);
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+
+ return SCpnt;
+}
+
+/*
+ * Function: struct scsi_cmnd *queue_remove (queue)
+ * Purpose : removes first SCSI command from a queue
+ * Params : queue - queue to remove command from
+ * Returns : struct scsi_cmnd if successful (and a reference), or NULL if no command available
+ */
+struct scsi_cmnd *queue_remove(Queue_t *queue)
+{
+ unsigned long flags;
+ struct scsi_cmnd *SCpnt = NULL;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ if (!list_empty(&queue->head))
+ SCpnt = __queue_remove(queue, queue->head.next);
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+
+ return SCpnt;
+}
+
+/*
+ * Function: struct scsi_cmnd *queue_remove_tgtluntag (queue, target, lun, tag)
+ * Purpose : remove a SCSI command from the queue for a specified target/lun/tag
+ * Params : queue - queue to remove command from
+ * target - target that we want
+ * lun - lun on device
+ * tag - tag on device
+ * Returns : struct scsi_cmnd if successful, or NULL if no command satisfies requirements
+ */
+struct scsi_cmnd *queue_remove_tgtluntag(Queue_t *queue, int target, int lun,
+ int tag)
+{
+ unsigned long flags;
+ struct list_head *l;
+ struct scsi_cmnd *SCpnt = NULL;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ list_for_each(l, &queue->head) {
+ QE_t *q = list_entry(l, QE_t, list);
+ if (q->SCpnt->device->id == target && q->SCpnt->device->lun == lun &&
+ q->SCpnt->tag == tag) {
+ SCpnt = __queue_remove(queue, l);
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+
+ return SCpnt;
+}
+
+/*
+ * Function: queue_remove_all_target(queue, target)
+ * Purpose : remove all SCSI commands from the queue for a specified target
+ * Params : queue - queue to remove command from
+ * target - target device id
+ * Returns : nothing
+ */
+void queue_remove_all_target(Queue_t *queue, int target)
+{
+ unsigned long flags;
+ struct list_head *l;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ list_for_each(l, &queue->head) {
+ QE_t *q = list_entry(l, QE_t, list);
+ if (q->SCpnt->device->id == target)
+ __queue_remove(queue, l);
+ }
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+}
+
+/*
+ * Function: int queue_probetgtlun (queue, target, lun)
+ * Purpose : check to see if we have a command in the queue for the specified
+ * target/lun.
+ * Params : queue - queue to look in
+ * target - target we want to probe
+ * lun - lun on target
+ * Returns : 0 if not found, != 0 if found
+ */
+int queue_probetgtlun (Queue_t *queue, int target, int lun)
+{
+ unsigned long flags;
+ struct list_head *l;
+ int found = 0;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ list_for_each(l, &queue->head) {
+ QE_t *q = list_entry(l, QE_t, list);
+ if (q->SCpnt->device->id == target && q->SCpnt->device->lun == lun) {
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+
+ return found;
+}
+
+/*
+ * Function: int queue_remove_cmd(Queue_t *queue, struct scsi_cmnd *SCpnt)
+ * Purpose : remove a specific command from the queues
+ * Params : queue - queue to look in
+ * SCpnt - command to find
+ * Returns : 0 if not found
+ */
+int queue_remove_cmd(Queue_t *queue, struct scsi_cmnd *SCpnt)
+{
+ unsigned long flags;
+ struct list_head *l;
+ int found = 0;
+
+ spin_lock_irqsave(&queue->queue_lock, flags);
+ list_for_each(l, &queue->head) {
+ QE_t *q = list_entry(l, QE_t, list);
+ if (q->SCpnt == SCpnt) {
+ __queue_remove(queue, l);
+ found = 1;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&queue->queue_lock, flags);
+
+ return found;
+}
+
+EXPORT_SYMBOL(queue_initialise);
+EXPORT_SYMBOL(queue_free);
+EXPORT_SYMBOL(__queue_add);
+EXPORT_SYMBOL(queue_remove);
+EXPORT_SYMBOL(queue_remove_exclude);
+EXPORT_SYMBOL(queue_remove_tgtluntag);
+EXPORT_SYMBOL(queue_remove_cmd);
+EXPORT_SYMBOL(queue_remove_all_target);
+EXPORT_SYMBOL(queue_probetgtlun);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("SCSI command queueing");
+MODULE_LICENSE("GPL");
diff --git a/drivers/scsi/arm/queue.h b/drivers/scsi/arm/queue.h
new file mode 100644
index 0000000..3c519c9
--- /dev/null
+++ b/drivers/scsi/arm/queue.h
@@ -0,0 +1,107 @@
+/*
+ * linux/drivers/acorn/scsi/queue.h: queue handling
+ *
+ * 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.
+ */
+#ifndef QUEUE_H
+#define QUEUE_H
+
+typedef struct {
+ struct list_head head;
+ struct list_head free;
+ spinlock_t queue_lock;
+ void *alloc; /* start of allocated mem */
+} Queue_t;
+
+/*
+ * Function: void queue_initialise (Queue_t *queue)
+ * Purpose : initialise a queue
+ * Params : queue - queue to initialise
+ */
+extern int queue_initialise (Queue_t *queue);
+
+/*
+ * Function: void queue_free (Queue_t *queue)
+ * Purpose : free a queue
+ * Params : queue - queue to free
+ */
+extern void queue_free (Queue_t *queue);
+
+/*
+ * Function: struct scsi_cmnd *queue_remove (queue)
+ * Purpose : removes first SCSI command from a queue
+ * Params : queue - queue to remove command from
+ * Returns : struct scsi_cmnd if successful (and a reference), or NULL if no command available
+ */
+extern struct scsi_cmnd *queue_remove (Queue_t *queue);
+
+/*
+ * Function: struct scsi_cmnd *queue_remove_exclude_ref (queue, exclude)
+ * Purpose : remove a SCSI command from a queue
+ * Params : queue - queue to remove command from
+ * exclude - array of busy LUNs
+ * Returns : struct scsi_cmnd if successful (and a reference), or NULL if no command available
+ */
+extern struct scsi_cmnd *queue_remove_exclude(Queue_t *queue,
+ unsigned long *exclude);
+
+#define queue_add_cmd_ordered(queue,SCpnt) \
+ __queue_add(queue,SCpnt,(SCpnt)->cmnd[0] == REQUEST_SENSE)
+#define queue_add_cmd_tail(queue,SCpnt) \
+ __queue_add(queue,SCpnt,0)
+/*
+ * Function: int __queue_add(Queue_t *queue, struct scsi_cmnd *SCpnt, int head)
+ * Purpose : Add a new command onto a queue
+ * Params : queue - destination queue
+ * SCpnt - command to add
+ * head - add command to head of queue
+ * Returns : 0 on error, !0 on success
+ */
+extern int __queue_add(Queue_t *queue, struct scsi_cmnd *SCpnt, int head);
+
+/*
+ * Function: struct scsi_cmnd *queue_remove_tgtluntag (queue, target, lun, tag)
+ * Purpose : remove a SCSI command from the queue for a specified target/lun/tag
+ * Params : queue - queue to remove command from
+ * target - target that we want
+ * lun - lun on device
+ * tag - tag on device
+ * Returns : struct scsi_cmnd if successful, or NULL if no command satisfies requirements
+ */
+extern struct scsi_cmnd *queue_remove_tgtluntag(Queue_t *queue, int target,
+ int lun, int tag);
+
+/*
+ * Function: queue_remove_all_target(queue, target)
+ * Purpose : remove all SCSI commands from the queue for a specified target
+ * Params : queue - queue to remove command from
+ * target - target device id
+ * Returns : nothing
+ */
+extern void queue_remove_all_target(Queue_t *queue, int target);
+
+/*
+ * Function: int queue_probetgtlun (queue, target, lun)
+ * Purpose : check to see if we have a command in the queue for the specified
+ * target/lun.
+ * Params : queue - queue to look in
+ * target - target we want to probe
+ * lun - lun on target
+ * Returns : 0 if not found, != 0 if found
+ */
+extern int queue_probetgtlun (Queue_t *queue, int target, int lun);
+
+/*
+ * Function: int queue_remove_cmd (Queue_t *queue, struct scsi_cmnd *SCpnt)
+ * Purpose : remove a specific command from the queues
+ * Params : queue - queue to look in
+ * SCpnt - command to find
+ * Returns : 0 if not found
+ */
+int queue_remove_cmd(Queue_t *queue, struct scsi_cmnd *SCpnt);
+
+#endif /* QUEUE_H */
diff --git a/drivers/scsi/arm/scsi.h b/drivers/scsi/arm/scsi.h
new file mode 100644
index 0000000..138a521
--- /dev/null
+++ b/drivers/scsi/arm/scsi.h
@@ -0,0 +1,128 @@
+/*
+ * linux/drivers/acorn/scsi/scsi.h
+ *
+ * Copyright (C) 2002 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.
+ *
+ * Commonly used scsi driver functions.
+ */
+
+#include <linux/scatterlist.h>
+
+#define BELT_AND_BRACES
+
+/*
+ * The scatter-gather list handling. This contains all
+ * the yucky stuff that needs to be fixed properly.
+ */
+
+/*
+ * copy_SCp_to_sg() Assumes contiguous allocation at @sg of at-most @max
+ * entries of uninitialized memory. SCp is from scsi-ml and has a valid
+ * (possibly chained) sg-list
+ */
+static inline int copy_SCp_to_sg(struct scatterlist *sg, struct scsi_pointer *SCp, int max)
+{
+ int bufs = SCp->buffers_residual;
+
+ /* FIXME: It should be easy for drivers to loop on copy_SCp_to_sg().
+ * and to remove this BUG_ON. Use min() in-its-place
+ */
+ BUG_ON(bufs + 1 > max);
+
+ sg_set_buf(sg, SCp->ptr, SCp->this_residual);
+
+ if (bufs) {
+ struct scatterlist *src_sg;
+ unsigned i;
+
+ for_each_sg(sg_next(SCp->buffer), src_sg, bufs, i)
+ *(++sg) = *src_sg;
+ sg_mark_end(sg);
+ }
+
+ return bufs + 1;
+}
+
+static inline int next_SCp(struct scsi_pointer *SCp)
+{
+ int ret = SCp->buffers_residual;
+ if (ret) {
+ SCp->buffer = sg_next(SCp->buffer);
+ SCp->buffers_residual--;
+ SCp->ptr = sg_virt(SCp->buffer);
+ SCp->this_residual = SCp->buffer->length;
+ } else {
+ SCp->ptr = NULL;
+ SCp->this_residual = 0;
+ }
+ return ret;
+}
+
+static inline unsigned char get_next_SCp_byte(struct scsi_pointer *SCp)
+{
+ char c = *SCp->ptr;
+
+ SCp->ptr += 1;
+ SCp->this_residual -= 1;
+
+ return c;
+}
+
+static inline void put_next_SCp_byte(struct scsi_pointer *SCp, unsigned char c)
+{
+ *SCp->ptr = c;
+ SCp->ptr += 1;
+ SCp->this_residual -= 1;
+}
+
+static inline void init_SCp(struct scsi_cmnd *SCpnt)
+{
+ memset(&SCpnt->SCp, 0, sizeof(struct scsi_pointer));
+
+ if (scsi_bufflen(SCpnt)) {
+ unsigned long len = 0;
+
+ SCpnt->SCp.buffer = scsi_sglist(SCpnt);
+ SCpnt->SCp.buffers_residual = scsi_sg_count(SCpnt) - 1;
+ SCpnt->SCp.ptr = sg_virt(SCpnt->SCp.buffer);
+ SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
+ SCpnt->SCp.phase = scsi_bufflen(SCpnt);
+
+#ifdef BELT_AND_BRACES
+ { /*
+ * Calculate correct buffer length. Some commands
+ * come in with the wrong scsi_bufflen.
+ */
+ struct scatterlist *sg;
+ unsigned i, sg_count = scsi_sg_count(SCpnt);
+
+ scsi_for_each_sg(SCpnt, sg, sg_count, i)
+ len += sg->length;
+
+ if (scsi_bufflen(SCpnt) != len) {
+ printk(KERN_WARNING
+ "scsi%d.%c: bad request buffer "
+ "length %d, should be %ld\n",
+ SCpnt->device->host->host_no,
+ '0' + SCpnt->device->id,
+ scsi_bufflen(SCpnt), len);
+ /*
+ * FIXME: Totaly naive fixup. We should abort
+ * with error
+ */
+ SCpnt->SCp.phase =
+ min_t(unsigned long, len,
+ scsi_bufflen(SCpnt));
+ }
+ }
+#endif
+ } else {
+ SCpnt->SCp.ptr = NULL;
+ SCpnt->SCp.this_residual = 0;
+ SCpnt->SCp.phase = 0;
+ }
+}