Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

19 files changed, 10881 insertions, 0 deletions

diff --git a/drivers/scsi/arm/Kconfig b/drivers/scsi/arm/Kconfig
new file mode 100644
index 00000000000..54b32868aaf
--- /dev/null
+++ b/drivers/scsi/arm/Kconfig
@@ -0,0 +1,89 @@
+#
+# SCSI driver configuration for Acorn
+#
+config SCSI_ACORNSCSI_3
+	tristate "Acorn SCSI card (aka30) support"
+	depends on ARCH_ACORN && SCSI
+	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 && EXPERIMENTAL
+
+config SCSI_CUMANA_1
+	tristate "CumanaSCSI I support (EXPERIMENTAL)"
+	depends on ARCH_ACORN && EXPERIMENTAL && SCSI
+	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_ECOSCSI
+	tristate "EcoScsi support (EXPERIMENTAL)"
+	depends on ARCH_ACORN && EXPERIMENTAL && (ARCH_ARC || ARCH_A5K) && SCSI
+	help
+	  This enables support for the EcoSCSI card -- a small card that sits
+	  in the Econet socket. If you have an Acorn system with one of these,
+	  say Y. If unsure, say N.
+
+config SCSI_OAK1
+	tristate "Oak SCSI support (EXPERIMENTAL)"
+	depends on ARCH_ACORN && EXPERIMENTAL && SCSI
+	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 00000000000..e8db17924c1
--- /dev/null
+++ b/drivers/scsi/arm/Makefile
@@ -0,0 +1,14 @@
+#
+# 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-$(CONFIG_SCSI_ECOSCSI)	+= ecoscsi.o
+obj-$(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 00000000000..93467e6ac92
--- /dev/null
+++ b/drivers/scsi/arm/acornscsi-io.S
@@ -0,0 +1,145 @@
+/*
+ *  linux/drivers/acorn/scsi/acornscsi-io.S: Acorn SCSI card IO
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+
+#include <asm/assembler.h>
+#include <asm/hardware.h>
+
+#if (IO_BASE == (PCIO_BASE & 0xff000000))
+#define ADDR(off,reg)						\
+		tst	off, $0x80000000			;\
+		mov	reg, $IO_BASE				;\
+		orreq	reg, reg, $(PCIO_BASE & 0x00ff0000)
+#else
+#define ADDR(off,reg)						\
+		tst	off, $0x80000000			;\
+		movne	reg, $IO_BASE				;\
+		moveq	reg, $(PCIO_BASE & 0xff000000)		;\
+		orreq	reg, reg, $(PCIO_BASE & 0x00ff0000)
+#endif
+
+@ Purpose: transfer a block of data from the acorn scsi card to memory
+@ Proto  : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
+@ Returns: nothing
+
+		.align
+ENTRY(__acornscsi_in)
+		stmfd	sp!, {r4 - r7, lr}
+		bic	r0, r0, #3
+		mov	lr, #0xff
+		orr	lr, lr, #0xff00
+acornscsi_in16lp:
+		subs	r2, r2, #16
+		bmi	acornscsi_in8
+		ldmia	r0!, {r3, r4, r5, r6}
+		and	r3, r3, lr
+		orr	r3, r3, r4, lsl #16
+		and 	r4, r5, lr
+		orr	r4, r4, r6, lsl #16
+		ldmia	r0!, {r5, r6, r7, ip}
+		and	r5, r5, lr
+		orr	r5, r5, r6, lsl #16
+		and	r6, r7, lr
+		orr	r6, r6, ip, lsl #16
+		stmia	r1!, {r3 - r6}
+		bne	acornscsi_in16lp
+		LOADREGS(fd, sp!, {r4 - r7, pc})
+
+acornscsi_in8:	adds	r2, r2, #8
+		bmi	acornscsi_in4
+		ldmia	r0!, {r3, r4, r5, r6}
+		and	r3, r3, lr
+		orr	r3, r3, r4, lsl #16
+		and	r4, r5, lr
+		orr	r4, r4, r6, lsl #16
+		stmia	r1!, {r3 - r4}
+		LOADREGS(eqfd, sp!, {r4 - r7, pc})
+		sub	r2, r2, #8
+
+acornscsi_in4:	adds	r2, r2, #4
+		bmi	acornscsi_in2
+		ldmia	r0!, {r3, r4}
+		and	r3, r3, lr
+		orr	r3, r3, r4, lsl #16
+		str	r3, [r1], #4
+		LOADREGS(eqfd, sp!, {r4 - r7, pc})
+		sub	r2, r2, #4
+
+acornscsi_in2:	adds	r2, r2, #2
+		ldr	r3, [r0], #4
+		and	r3, r3, lr
+		strb	r3, [r1], #1
+		mov	r3, r3, lsr #8
+		strplb	r3, [r1], #1
+		LOADREGS(fd, sp!, {r4 - r7, pc})
+
+@ Purpose: transfer a block of data from memory to the acorn scsi card
+@ Proto  : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
+@ Returns: nothing
+
+ENTRY(__acornscsi_out)
+		stmfd	sp!, {r4 - r6, lr}
+		bic	r0, r0, #3
+acornscsi_out16lp:
+		subs	r2, r2, #16
+		bmi	acornscsi_out8
+		ldmia	r1!, {r4, r6, ip, lr}
+		mov	r3, r4, lsl #16
+		orr	r3, r3, r3, lsr #16
+		mov	r4, r4, lsr #16
+		orr	r4, r4, r4, lsl #16
+		mov	r5, r6, lsl #16
+		orr	r5, r5, r5, lsr #16
+		mov	r6, r6, lsr #16
+		orr	r6, r6, r6, lsl #16
+		stmia	r0!, {r3, r4, r5, r6}
+		mov	r3, ip, lsl #16
+		orr	r3, r3, r3, lsr #16
+		mov	r4, ip, lsr #16
+		orr	r4, r4, r4, lsl #16
+		mov	ip, lr, lsl #16
+		orr	ip, ip, ip, lsr #16
+		mov	lr, lr, lsr #16
+		orr	lr, lr, lr, lsl #16
+		stmia	r0!, {r3, r4, ip, lr}
+		bne	acornscsi_out16lp
+		LOADREGS(fd, sp!, {r4 - r6, pc})
+
+acornscsi_out8:	adds	r2, r2, #8
+		bmi	acornscsi_out4
+		ldmia	r1!, {r4, r6}
+		mov	r3, r4, lsl #16
+		orr	r3, r3, r3, lsr #16
+		mov	r4, r4, lsr #16
+		orr	r4, r4, r4, lsl #16
+		mov	r5, r6, lsl #16
+		orr	r5, r5, r5, lsr #16
+		mov	r6, r6, lsr #16
+		orr	r6, r6, r6, lsl #16
+		stmia	r0!, {r3, r4, r5, r6}
+		LOADREGS(eqfd, sp!, {r4 - r6, pc})
+
+		sub	r2, r2, #8
+acornscsi_out4:	adds	r2, r2, #4
+		bmi	acornscsi_out2
+		ldr	r4, [r1], #4
+		mov	r3, r4, lsl #16
+		orr	r3, r3, r3, lsr #16
+		mov	r4, r4, lsr #16
+		orr	r4, r4, r4, lsl #16
+		stmia	r0!, {r3, r4}
+		LOADREGS(eqfd, sp!, {r4 - r6, pc})
+
+		sub	r2, r2, #4
+acornscsi_out2:	adds	r2, r2, #2
+		ldr	r3, [r1], #2
+		strb	r3, [r0], #1
+		mov	r3, r3, lsr #8
+		strplb	r3, [r0], #1
+		LOADREGS(fd, sp!, {r4 - r6, pc})
+
diff --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c
new file mode 100644
index 00000000000..24dd0b890dd
--- /dev/null
+++ b/drivers/scsi/arm/acornscsi.c
@@ -0,0 +1,3130 @@
+/*
+ *  linux/drivers/acorn/scsi/acornscsi.c
+ *
+ *  Acorn SCSI 3 driver
+ *  By R.M.King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Abandoned using the Select and Transfer command since there were
+ * some nasty races between our software and the target devices that
+ * were not easy to solve, and the device errata had a lot of entries
+ * for this command, some of them quite nasty...
+ *
+ * Changelog:
+ *  26-Sep-1997	RMK	Re-jigged to use the queue module.
+ *			Re-coded state machine to be based on driver
+ *			state not scsi state.  Should be easier to debug.
+ *			Added acornscsi_release to clean up properly.
+ *			Updated proc/scsi reporting.
+ *  05-Oct-1997	RMK	Implemented writing to SCSI devices.
+ *  06-Oct-1997	RMK	Corrected small (non-serious) bug with the connect/
+ *			reconnect race condition causing a warning message.
+ *  12-Oct-1997	RMK	Added catch for re-entering interrupt routine.
+ *  15-Oct-1997	RMK	Improved handling of commands.
+ *  27-Jun-1998	RMK	Changed asm/delay.h to linux/delay.h.
+ *  13-Dec-1998	RMK	Better abort code and command handling.  Extra state
+ *			transitions added to allow dodgy devices to work.
+ */
+#define DEBUG_NO_WRITE	1
+#define DEBUG_QUEUES	2
+#define DEBUG_DMA	4
+#define DEBUG_ABORT	8
+#define DEBUG_DISCON	16
+#define DEBUG_CONNECT	32
+#define DEBUG_PHASES	64
+#define DEBUG_WRITE	128
+#define DEBUG_LINK	256
+#define DEBUG_MESSAGES	512
+#define DEBUG_RESET	1024
+#define DEBUG_ALL	(DEBUG_RESET|DEBUG_MESSAGES|DEBUG_LINK|DEBUG_WRITE|\
+			 DEBUG_PHASES|DEBUG_CONNECT|DEBUG_DISCON|DEBUG_ABORT|\
+			 DEBUG_DMA|DEBUG_QUEUES)
+
+/* DRIVER CONFIGURATION
+ *
+ * SCSI-II Tagged queue support.
+ *
+ * I don't have any SCSI devices that support it, so it is totally untested
+ * (except to make sure that it doesn't interfere with any non-tagging
+ * devices).  It is not fully implemented either - what happens when a
+ * tagging device reconnects???
+ *
+ * You can tell if you have a device that supports tagged queueing my
+ * cating (eg) /proc/scsi/acornscsi/0 and see if the SCSI revision is reported
+ * as '2 TAG'.
+ *
+ * Also note that CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE is normally set in the config
+ * scripts, but disabled here.  Once debugged, remove the #undef, otherwise to debug,
+ * comment out the undef.
+ */
+#undef CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE
+/*
+ * SCSI-II Linked command support.
+ *
+ * The higher level code doesn't support linked commands yet, and so the option
+ * is undef'd here.
+ */
+#undef CONFIG_SCSI_ACORNSCSI_LINK
+/*
+ * SCSI-II Synchronous transfer support.
+ *
+ * Tried and tested...
+ *
+ * SDTR_SIZE	  - maximum number of un-acknowledged bytes (0 = off, 12 = max)
+ * SDTR_PERIOD	  - period of REQ signal (min=125, max=1020)
+ * DEFAULT_PERIOD - default REQ period.
+ */
+#define SDTR_SIZE	12
+#define SDTR_PERIOD	125
+#define DEFAULT_PERIOD	500
+
+/*
+ * Debugging information
+ *
+ * DEBUG	  - bit mask from list above
+ * DEBUG_TARGET   - is defined to the target number if you want to debug
+ *		    a specific target. [only recon/write/dma].
+ */
+#define DEBUG (DEBUG_RESET|DEBUG_WRITE|DEBUG_NO_WRITE)
+/* only allow writing to SCSI device 0 */
+#define NO_WRITE 0xFE
+/*#define DEBUG_TARGET 2*/
+/*
+ * Select timeout time (in 10ms units)
+ *
+ * This is the timeout used between the start of selection and the WD33C93
+ * chip deciding that the device isn't responding.
+ */
+#define TIMEOUT_TIME 10
+/*
+ * Define this if you want to have verbose explaination of SCSI
+ * status/messages.
+ */
+#undef CONFIG_ACORNSCSI_CONSTANTS
+/*
+ * Define this if you want to use the on board DMAC [don't remove this option]
+ * If not set, then use PIO mode (not currently supported).
+ */
+#define USE_DMAC
+
+/*
+ * ====================================================================================
+ */
+
+#ifdef DEBUG_TARGET
+#define DBG(cmd,xxx...) \
+  if (cmd->device->id == DEBUG_TARGET) { \
+    xxx; \
+  }
+#else
+#define DBG(cmd,xxx...) xxx
+#endif
+
+#ifndef STRINGIFY
+#define STRINGIFY(x) #x
+#endif
+#define STRx(x) STRINGIFY(x)
+#define NO_WRITE_STR STRx(NO_WRITE)
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ecard.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_host.h>
+#include "acornscsi.h"
+#include "msgqueue.h"
+#include "scsi.h"
+
+#include <scsi/scsicam.h>
+
+#define VER_MAJOR 2
+#define VER_MINOR 0
+#define VER_PATCH 6
+
+#ifndef ABORT_TAG
+#define ABORT_TAG 0xd
+#else
+#error "Yippee!  ABORT TAG is now defined!  Remove this error!"
+#endif
+
+#ifdef CONFIG_SCSI_ACORNSCSI_LINK
+#error SCSI2 LINKed commands not supported (yet)!
+#endif
+
+#ifdef USE_DMAC
+/*
+ * DMAC setup parameters
+ */ 
+#define INIT_DEVCON0	(DEVCON0_RQL|DEVCON0_EXW|DEVCON0_CMP)
+#define INIT_DEVCON1	(DEVCON1_BHLD)
+#define DMAC_READ	(MODECON_READ)
+#define DMAC_WRITE	(MODECON_WRITE)
+#define INIT_SBICDMA	(CTRL_DMABURST)
+
+#define scsi_xferred	have_data_in
+
+/*
+ * Size of on-board DMA buffer
+ */
+#define DMAC_BUFFER_SIZE	65536
+#endif
+
+#define STATUS_BUFFER_TO_PRINT	24
+
+unsigned int sdtr_period = SDTR_PERIOD;
+unsigned int sdtr_size   = SDTR_SIZE;
+
+static void acornscsi_done(AS_Host *host, Scsi_Cmnd **SCpntp, unsigned int result);
+static int acornscsi_reconnect_finish(AS_Host *host);
+static void acornscsi_dma_cleanup(AS_Host *host);
+static void acornscsi_abortcmd(AS_Host *host, unsigned char tag);
+
+/* ====================================================================================
+ * Miscellaneous
+ */
+
+static inline void
+sbic_arm_write(unsigned int io_port, int reg, int value)
+{
+    __raw_writeb(reg, io_port);
+    __raw_writeb(value, io_port + 4);
+}
+
+#define sbic_arm_writenext(io,val) \
+	__raw_writeb((val), (io) + 4)
+
+static inline
+int sbic_arm_read(unsigned int io_port, int reg)
+{
+    if(reg == SBIC_ASR)
+	   return __raw_readl(io_port) & 255;
+    __raw_writeb(reg, io_port);
+    return __raw_readl(io_port + 4) & 255;
+}
+
+#define sbic_arm_readnext(io) \
+	__raw_readb((io) + 4)
+
+#ifdef USE_DMAC
+#define dmac_read(io_port,reg) \
+	inb((io_port) + (reg))
+
+#define dmac_write(io_port,reg,value) \
+	({ outb((value), (io_port) + (reg)); })
+
+#define dmac_clearintr(io_port) \
+	({ outb(0, (io_port)); })
+
+static inline
+unsigned int dmac_address(unsigned int io_port)
+{
+    return dmac_read(io_port, DMAC_TXADRHI) << 16 |
+	   dmac_read(io_port, DMAC_TXADRMD) << 8 |
+	   dmac_read(io_port, DMAC_TXADRLO);
+}
+
+static
+void acornscsi_dumpdma(AS_Host *host, char *where)
+{
+	unsigned int mode, addr, len;
+
+	mode = dmac_read(host->dma.io_port, DMAC_MODECON);
+	addr = dmac_address(host->dma.io_port);
+	len  = dmac_read(host->dma.io_port, DMAC_TXCNTHI) << 8 |
+	       dmac_read(host->dma.io_port, DMAC_TXCNTLO);
+
+	printk("scsi%d: %s: DMAC %02x @%06x+%04x msk %02x, ",
+		host->host->host_no, where,
+		mode, addr, (len + 1) & 0xffff,
+		dmac_read(host->dma.io_port, DMAC_MASKREG));
+
+	printk("DMA @%06x, ", host->dma.start_addr);
+	printk("BH @%p +%04x, ", host->scsi.SCp.ptr,
+		host->scsi.SCp.this_residual);
+	printk("DT @+%04x ST @+%04x", host->dma.transferred,
+		host->scsi.SCp.scsi_xferred);
+	printk("\n");
+}
+#endif
+
+static
+unsigned long acornscsi_sbic_xfcount(AS_Host *host)
+{
+    unsigned long length;
+
+    length = sbic_arm_read(host->scsi.io_port, SBIC_TRANSCNTH) << 16;
+    length |= sbic_arm_readnext(host->scsi.io_port) << 8;
+    length |= sbic_arm_readnext(host->scsi.io_port);
+
+    return length;
+}
+
+static int
+acornscsi_sbic_wait(AS_Host *host, int stat_mask, int stat, int timeout, char *msg)
+{
+	int asr;
+
+	do {
+		asr = sbic_arm_read(host->scsi.io_port, SBIC_ASR);
+
+		if ((asr & stat_mask) == stat)
+			return 0;
+
+		udelay(1);
+	} while (--timeout);
+
+	printk("scsi%d: timeout while %s\n", host->host->host_no, msg);
+
+	return -1;
+}
+
+static
+int acornscsi_sbic_issuecmd(AS_Host *host, int command)
+{
+    if (acornscsi_sbic_wait(host, ASR_CIP, 0, 1000, "issuing command"))
+	return -1;
+
+    sbic_arm_write(host->scsi.io_port, SBIC_CMND, command);
+
+    return 0;
+}
+
+static void
+acornscsi_csdelay(unsigned int cs)
+{
+    unsigned long target_jiffies, flags;
+
+    target_jiffies = jiffies + 1 + cs * HZ / 100;
+
+    local_save_flags(flags);
+    local_irq_enable();
+
+    while (time_before(jiffies, target_jiffies)) barrier();
+
+    local_irq_restore(flags);
+}
+
+static
+void acornscsi_resetcard(AS_Host *host)
+{
+    unsigned int i, timeout;
+
+    /* assert reset line */
+    host->card.page_reg = 0x80;
+    outb(host->card.page_reg, host->card.io_page);
+
+    /* wait 3 cs.  SCSI standard says 25ms. */
+    acornscsi_csdelay(3);
+
+    host->card.page_reg = 0;
+    outb(host->card.page_reg, host->card.io_page);
+
+    /*
+     * Should get a reset from the card
+     */
+    timeout = 1000;
+    do {
+	if (inb(host->card.io_intr) & 8)
+	    break;
+	udelay(1);
+    } while (--timeout);
+
+    if (timeout == 0)
+	printk("scsi%d: timeout while resetting card\n",
+		host->host->host_no);
+
+    sbic_arm_read(host->scsi.io_port, SBIC_ASR);
+    sbic_arm_read(host->scsi.io_port, SBIC_SSR);
+
+    /* setup sbic - WD33C93A */
+    sbic_arm_write(host->scsi.io_port, SBIC_OWNID, OWNID_EAF | host->host->this_id);
+    sbic_arm_write(host->scsi.io_port, SBIC_CMND, CMND_RESET);
+
+    /*
+     * Command should cause a reset interrupt
+     */
+    timeout = 1000;
+    do {
+	if (inb(host->card.io_intr) & 8)
+	    break;
+	udelay(1);
+    } while (--timeout);
+
+    if (timeout == 0)
+	printk("scsi%d: timeout while resetting card\n",
+		host->host->host_no);
+
+    sbic_arm_read(host->scsi.io_port, SBIC_ASR);
+    if (sbic_arm_read(host->scsi.io_port, SBIC_SSR) != 0x01)
+	printk(KERN_CRIT "scsi%d: WD33C93A didn't give enhanced reset interrupt\n",
+		host->host->host_no);
+
+    sbic_arm_write(host->scsi.io_port, SBIC_CTRL, INIT_SBICDMA | CTRL_IDI);
+    sbic_arm_write(host->scsi.io_port, SBIC_TIMEOUT, TIMEOUT_TIME);
+    sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, SYNCHTRANSFER_2DBA);
+    sbic_arm_write(host->scsi.io_port, SBIC_SOURCEID, SOURCEID_ER | SOURCEID_DSP);
+
+    host->card.page_reg = 0x40;
+    outb(host->card.page_reg, host->card.io_page);
+
+    /* setup dmac - uPC71071 */
+    dmac_write(host->dma.io_port, DMAC_INIT, 0);
+#ifdef USE_DMAC
+    dmac_write(host->dma.io_port, DMAC_INIT, INIT_8BIT);
+    dmac_write(host->dma.io_port, DMAC_CHANNEL, CHANNEL_0);
+    dmac_write(host->dma.io_port, DMAC_DEVCON0, INIT_DEVCON0);
+    dmac_write(host->dma.io_port, DMAC_DEVCON1, INIT_DEVCON1);
+#endif
+
+    host->SCpnt = NULL;
+    host->scsi.phase = PHASE_IDLE;
+    host->scsi.disconnectable = 0;
+
+    memset(host->busyluns, 0, sizeof(host->busyluns));
+
+    for (i = 0; i < 8; i++) {
+	host->device[i].sync_state = SYNC_NEGOCIATE;
+	host->device[i].disconnect_ok = 1;
+    }
+
+    /* wait 25 cs.  SCSI standard says 250ms. */
+    acornscsi_csdelay(25);
+}
+
+/*=============================================================================================
+ * Utility routines (eg. debug)
+ */
+#ifdef CONFIG_ACORNSCSI_CONSTANTS
+static char *acornscsi_interrupttype[] = {
+  "rst",  "suc",  "p/a",  "3",
+  "term", "5",	  "6",	  "7",
+  "serv", "9",	  "a",	  "b",
+  "c",	  "d",	  "e",	  "f"
+};
+
+static signed char acornscsi_map[] = {
+  0,  1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1,  2, -1, -1,  -1, -1,  3, -1,   4,	5,  6,	7,   8,  9, 10, 11,
+ 12, 13, 14, -1,  -1, -1, -1, -1,   4,	5,  6,	7,   8,  9, 10, 11,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ 15, 16, 17, 18,  19, -1, -1, 20,   4,	5,  6,	7,   8,  9, 10, 11,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ 21, 22, -1, -1,  -1, 23, -1, -1,   4,	5,  6,	7,   8,  9, 10, 11,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,
+ -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1,  -1, -1, -1, -1
+};      
+
+static char *acornscsi_interruptcode[] = {
+    /* 0 */
+    "reset - normal mode",	/* 00 */
+    "reset - advanced mode",	/* 01 */
+
+    /* 2 */
+    "sel",			/* 11 */
+    "sel+xfer", 		/* 16 */
+    "data-out", 		/* 18 */
+    "data-in",			/* 19 */
+    "cmd",			/* 1A */
+    "stat",			/* 1B */
+    "??-out",			/* 1C */
+    "??-in",			/* 1D */
+    "msg-out",			/* 1E */
+    "msg-in",			/* 1F */
+
+    /* 12 */
+    "/ACK asserted",		/* 20 */
+    "save-data-ptr",		/* 21 */
+    "{re}sel",			/* 22 */
+
+    /* 15 */
+    "inv cmd",			/* 40 */
+    "unexpected disconnect",	/* 41 */
+    "sel timeout",		/* 42 */
+    "P err",			/* 43 */
+    "P err+ATN",		/* 44 */
+    "bad status byte",		/* 47 */
+
+    /* 21 */
+    "resel, no id",		/* 80 */
+    "resel",			/* 81 */
+    "discon",			/* 85 */
+};
+
+static
+void print_scsi_status(unsigned int ssr)
+{
+    if (acornscsi_map[ssr] != -1)
+	printk("%s:%s",
+		acornscsi_interrupttype[(ssr >> 4)],
+		acornscsi_interruptcode[acornscsi_map[ssr]]);
+    else
+	printk("%X:%X", ssr >> 4, ssr & 0x0f);    
+}    
+#endif
+
+static
+void print_sbic_status(int asr, int ssr, int cmdphase)
+{
+#ifdef CONFIG_ACORNSCSI_CONSTANTS
+    printk("sbic: %c%c%c%c%c%c ",
+	    asr & ASR_INT ? 'I' : 'i',
+	    asr & ASR_LCI ? 'L' : 'l',
+	    asr & ASR_BSY ? 'B' : 'b',
+	    asr & ASR_CIP ? 'C' : 'c',
+	    asr & ASR_PE  ? 'P' : 'p',
+	    asr & ASR_DBR ? 'D' : 'd');
+    printk("scsi: ");
+    print_scsi_status(ssr);
+    printk(" ph %02X\n", cmdphase);
+#else
+    printk("sbic: %02X scsi: %X:%X ph: %02X\n",
+	    asr, (ssr & 0xf0)>>4, ssr & 0x0f, cmdphase);
+#endif
+}
+
+static void
+acornscsi_dumplogline(AS_Host *host, int target, int line)
+{
+	unsigned long prev;
+	signed int ptr;
+
+	ptr = host->status_ptr[target] - STATUS_BUFFER_TO_PRINT;
+	if (ptr < 0)
+		ptr += STATUS_BUFFER_SIZE;
+
+	printk("%c: %3s:", target == 8 ? 'H' : '0' + target,
+		line == 0 ? "ph" : line == 1 ? "ssr" : "int");
+
+	prev = host->status[target][ptr].when;
+
+	for (; ptr != host->status_ptr[target]; ptr = (ptr + 1) & (STATUS_BUFFER_SIZE - 1)) {
+		unsigned long time_diff;
+
+		if (!host->status[target][ptr].when)
+			continue;
+
+		switch (line) {
+		case 0:
+			printk("%c%02X", host->status[target][ptr].irq ? '-' : ' ',
+					 host->status[target][ptr].ph);
+			break;
+
+		case 1:
+			printk(" %02X", host->status[target][ptr].ssr);
+			break;
+
+		case 2:
+			time_diff = host->status[target][ptr].when - prev;
+			prev = host->status[target][ptr].when;
+			if (time_diff == 0)
+				printk("==^");
+			else if (time_diff >= 100)
+				printk("   ");
+			else
+				printk(" %02ld", time_diff);
+			break;
+		}
+	}
+
+	printk("\n");
+}
+
+static
+void acornscsi_dumplog(AS_Host *host, int target)
+{
+    do {
+	acornscsi_dumplogline(host, target, 0);
+	acornscsi_dumplogline(host, target, 1);
+	acornscsi_dumplogline(host, target, 2);
+
+	if (target == 8)
+	    break;
+
+	target = 8;
+    } while (1);
+}
+
+static
+char acornscsi_target(AS_Host *host)
+{
+	if (host->SCpnt)
+		return '0' + host->SCpnt->device->id;
+	return 'H';
+}
+
+/*
+ * Prototype: cmdtype_t acornscsi_cmdtype(int command)
+ * Purpose  : differentiate READ from WRITE from other commands
+ * Params   : command - command to interpret
+ * Returns  : CMD_READ	- command reads data,
+ *	      CMD_WRITE - command writes data,
+ *	      CMD_MISC	- everything else
+ */
+static inline
+cmdtype_t acornscsi_cmdtype(int command)
+{
+    switch (command) {
+    case WRITE_6:  case WRITE_10:  case WRITE_12:
+	return CMD_WRITE;
+    case READ_6:   case READ_10:   case READ_12:
+	return CMD_READ;
+    default:
+	return CMD_MISC;
+    }
+}
+
+/*
+ * Prototype: int acornscsi_datadirection(int command)
+ * Purpose  : differentiate between commands that have a DATA IN phase
+ *	      and a DATA OUT phase
+ * Params   : command - command to interpret
+ * Returns  : DATADIR_OUT - data out phase expected
+ *	      DATADIR_IN  - data in phase expected
+ */
+static
+datadir_t acornscsi_datadirection(int command)
+{
+    switch (command) {
+    case CHANGE_DEFINITION:	case COMPARE:		case COPY:
+    case COPY_VERIFY:		case LOG_SELECT:	case MODE_SELECT:
+    case MODE_SELECT_10:	case SEND_DIAGNOSTIC:	case WRITE_BUFFER:
+    case FORMAT_UNIT:		case REASSIGN_BLOCKS:	case RESERVE:
+    case SEARCH_EQUAL:		case SEARCH_HIGH:	case SEARCH_LOW:
+    case WRITE_6:		case WRITE_10:		case WRITE_VERIFY:
+    case UPDATE_BLOCK:		case WRITE_LONG:	case WRITE_SAME:
+    case SEARCH_HIGH_12:	case SEARCH_EQUAL_12:	case SEARCH_LOW_12:
+    case WRITE_12:		case WRITE_VERIFY_12:	case SET_WINDOW:
+    case MEDIUM_SCAN:		case SEND_VOLUME_TAG:	case 0xea:
+	return DATADIR_OUT;
+    default:
+	return DATADIR_IN;
+    }
+}
+
+/*
+ * Purpose  : provide values for synchronous transfers with 33C93.
+ * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
+ *	Modified by Russell King for 8MHz WD33C93A
+ */
+static struct sync_xfer_tbl {
+    unsigned int period_ns;
+    unsigned char reg_value;
+} sync_xfer_table[] = {
+    {	1, 0x20 },    { 249, 0x20 },	{ 374, 0x30 },
+    { 499, 0x40 },    { 624, 0x50 },	{ 749, 0x60 },
+    { 874, 0x70 },    { 999, 0x00 },	{   0,	  0 }
+};
+
+/*
+ * Prototype: int acornscsi_getperiod(unsigned char syncxfer)
+ * Purpose  : period for the synchronous transfer setting
+ * Params   : syncxfer SYNCXFER register value
+ * Returns  : period in ns.
+ */
+static
+int acornscsi_getperiod(unsigned char syncxfer)
+{
+    int i;
+
+    syncxfer &= 0xf0;
+    if (syncxfer == 0x10)
+	syncxfer = 0;
+
+    for (i = 1; sync_xfer_table[i].period_ns; i++)
+	if (syncxfer == sync_xfer_table[i].reg_value)
+	    return sync_xfer_table[i].period_ns;
+    return 0;
+}
+
+/*
+ * Prototype: int round_period(unsigned int period)
+ * Purpose  : return index into above table for a required REQ period
+ * Params   : period - time (ns) for REQ
+ * Returns  : table index
+ * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
+ */
+static inline
+int round_period(unsigned int period)
+{
+    int i;
+
+    for (i = 1; sync_xfer_table[i].period_ns; i++) {
+	if ((period <= sync_xfer_table[i].period_ns) &&
+	    (period > sync_xfer_table[i - 1].period_ns))
+	    return i;
+    }
+    return 7;
+}
+
+/*
+ * Prototype: unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
+ * Purpose  : calculate value for 33c93s SYNC register
+ * Params   : period - time (ns) for REQ
+ *	      offset - offset in bytes between REQ/ACK
+ * Returns  : value for SYNC register
+ * Copyright: Copyright (c) 1996 John Shifflett, GeoLog Consulting
+ */
+static
+unsigned char calc_sync_xfer(unsigned int period, unsigned int offset)
+{
+    return sync_xfer_table[round_period(period)].reg_value |
+		((offset < SDTR_SIZE) ? offset : SDTR_SIZE);
+}
+
+/* ====================================================================================
+ * Command functions
+ */
+/*
+ * Function: acornscsi_kick(AS_Host *host)
+ * Purpose : kick next command to interface
+ * Params  : host - host to send command to
+ * Returns : INTR_IDLE if idle, otherwise INTR_PROCESSING
+ * Notes   : interrupts are always disabled!
+ */
+static
+intr_ret_t acornscsi_kick(AS_Host *host)
+{
+    int from_queue = 0;
+    Scsi_Cmnd *SCpnt;
+
+    /* first check to see if a command is waiting to be executed */
+    SCpnt = host->origSCpnt;
+    host->origSCpnt = NULL;