Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1226 insertions, 0 deletions

diff --git a/drivers/scsi/a100u2w.c b/drivers/scsi/a100u2w.c
new file mode 100644
index 0000000000..b95147fb18
--- /dev/null
+++ b/drivers/scsi/a100u2w.c
@@ -0,0 +1,1226 @@
+/*
+ * Initio A100 device driver for Linux.
+ *
+ * Copyright (c) 1994-1998 Initio Corporation
+ * Copyright (c) 2003-2004 Christoph Hellwig
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Revision History:
+ * 07/02/98 hl	- v.91n Initial drivers.
+ * 09/14/98 hl - v1.01 Support new Kernel.
+ * 09/22/98 hl - v1.01a Support reset.
+ * 09/24/98 hl - v1.01b Fixed reset.
+ * 10/05/98 hl - v1.02 split the source code and release.
+ * 12/19/98 bv - v1.02a Use spinlocks for 2.1.95 and up
+ * 01/31/99 bv - v1.02b Use mdelay instead of waitForPause
+ * 08/08/99 bv - v1.02c Use waitForPause again.
+ * 06/25/02 Doug Ledford <dledford@redhat.com> - v1.02d
+ *          - Remove limit on number of controllers
+ *          - Port to DMA mapping API
+ *          - Clean up interrupt handler registration
+ *          - Fix memory leaks
+ *          - Fix allocation of scsi host structs and private data
+ * 11/18/03 Christoph Hellwig <hch@lst.de>
+ *	    - Port to new probing API
+ *	    - Fix some more leaks in init failure cases
+ * 9/28/04 Christoph Hellwig <hch@lst.de>
+ *	    - merge the two source files
+ *	    - remove internal queueing code
+ * 14/06/07 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *	 - Grand cleanup and Linuxisation
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "a100u2w.h"
+
+
+static struct orc_scb *__orc_alloc_scb(struct orc_host * host);
+static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb);
+
+static struct orc_nvram nvram, *nvramp = &nvram;
+
+static u8 default_nvram[64] =
+{
+/*----------header -------------*/
+	0x01,			/* 0x00: Sub System Vendor ID 0 */
+	0x11,			/* 0x01: Sub System Vendor ID 1 */
+	0x60,			/* 0x02: Sub System ID 0        */
+	0x10,			/* 0x03: Sub System ID 1        */
+	0x00,			/* 0x04: SubClass               */
+	0x01,			/* 0x05: Vendor ID 0            */
+	0x11,			/* 0x06: Vendor ID 1            */
+	0x60,			/* 0x07: Device ID 0            */
+	0x10,			/* 0x08: Device ID 1            */
+	0x00,			/* 0x09: Reserved               */
+	0x00,			/* 0x0A: Reserved               */
+	0x01,			/* 0x0B: Revision of Data Structure     */
+				/* -- Host Adapter Structure --- */
+	0x01,			/* 0x0C: Number Of SCSI Channel */
+	0x01,			/* 0x0D: BIOS Configuration 1   */
+	0x00,			/* 0x0E: BIOS Configuration 2   */
+	0x00,			/* 0x0F: BIOS Configuration 3   */
+				/* --- SCSI Channel 0 Configuration --- */
+	0x07,			/* 0x10: H/A ID                 */
+	0x83,			/* 0x11: Channel Configuration  */
+	0x20,			/* 0x12: MAX TAG per target     */
+	0x0A,			/* 0x13: SCSI Reset Recovering time     */
+	0x00,			/* 0x14: Channel Configuration4 */
+	0x00,			/* 0x15: Channel Configuration5 */
+				/* SCSI Channel 0 Target Configuration  */
+				/* 0x16-0x25                    */
+	0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
+	0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
+				/* --- SCSI Channel 1 Configuration --- */
+	0x07,			/* 0x26: H/A ID                 */
+	0x83,			/* 0x27: Channel Configuration  */
+	0x20,			/* 0x28: MAX TAG per target     */
+	0x0A,			/* 0x29: SCSI Reset Recovering time     */
+	0x00,			/* 0x2A: Channel Configuration4 */
+	0x00,			/* 0x2B: Channel Configuration5 */
+				/* SCSI Channel 1 Target Configuration  */
+				/* 0x2C-0x3B                    */
+	0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
+	0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
+	0x00,			/* 0x3C: Reserved               */
+	0x00,			/* 0x3D: Reserved               */
+	0x00,			/* 0x3E: Reserved               */
+	0x00			/* 0x3F: Checksum               */
+};
+
+
+static u8 wait_chip_ready(struct orc_host * host)
+{
+	int i;
+
+	for (i = 0; i < 10; i++) {	/* Wait 1 second for report timeout     */
+		if (inb(host->base + ORC_HCTRL) & HOSTSTOP)	/* Wait HOSTSTOP set */
+			return 1;
+		msleep(100);
+	}
+	return 0;
+}
+
+static u8 wait_firmware_ready(struct orc_host * host)
+{
+	int i;
+
+	for (i = 0; i < 10; i++) {	/* Wait 1 second for report timeout     */
+		if (inb(host->base + ORC_HSTUS) & RREADY)		/* Wait READY set */
+			return 1;
+		msleep(100);	/* wait 100ms before try again  */
+	}
+	return 0;
+}
+
+/***************************************************************************/
+static u8 wait_scsi_reset_done(struct orc_host * host)
+{
+	int i;
+
+	for (i = 0; i < 10; i++) {	/* Wait 1 second for report timeout     */
+		if (!(inb(host->base + ORC_HCTRL) & SCSIRST))	/* Wait SCSIRST done */
+			return 1;
+		mdelay(100);	/* wait 100ms before try again  */
+	}
+	return 0;
+}
+
+/***************************************************************************/
+static u8 wait_HDO_off(struct orc_host * host)
+{
+	int i;
+
+	for (i = 0; i < 10; i++) {	/* Wait 1 second for report timeout     */
+		if (!(inb(host->base + ORC_HCTRL) & HDO))		/* Wait HDO off */
+			return 1;
+		mdelay(100);	/* wait 100ms before try again  */
+	}
+	return 0;
+}
+
+/***************************************************************************/
+static u8 wait_hdi_set(struct orc_host * host, u8 * data)
+{
+	int i;
+
+	for (i = 0; i < 10; i++) {	/* Wait 1 second for report timeout     */
+		if ((*data = inb(host->base + ORC_HSTUS)) & HDI)
+			return 1;	/* Wait HDI set */
+		mdelay(100);	/* wait 100ms before try again  */
+	}
+	return 0;
+}
+
+/***************************************************************************/
+static unsigned short orc_read_fwrev(struct orc_host * host)
+{
+	u16 version;
+	u8 data;
+
+	outb(ORC_CMD_VERSION, host->base + ORC_HDATA);
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	if (wait_hdi_set(host, &data) == 0)	/* Wait HDI set   */
+		return 0;
+	version = inb(host->base + ORC_HDATA);
+	outb(data, host->base + ORC_HSTUS);	/* Clear HDI            */
+
+	if (wait_hdi_set(host, &data) == 0)	/* Wait HDI set   */
+		return 0;
+	version |= inb(host->base + ORC_HDATA) << 8;
+	outb(data, host->base + ORC_HSTUS);	/* Clear HDI            */
+
+	return version;
+}
+
+/***************************************************************************/
+static u8 orc_nv_write(struct orc_host * host, unsigned char address, unsigned char value)
+{
+	outb(ORC_CMD_SET_NVM, host->base + ORC_HDATA);	/* Write command */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	outb(address, host->base + ORC_HDATA);	/* Write address */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	outb(value, host->base + ORC_HDATA);	/* Write value  */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	return 1;
+}
+
+/***************************************************************************/
+static u8 orc_nv_read(struct orc_host * host, u8 address, u8 *ptr)
+{
+	unsigned char data;
+
+	outb(ORC_CMD_GET_NVM, host->base + ORC_HDATA);	/* Write command */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	outb(address, host->base + ORC_HDATA);	/* Write address */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	if (wait_hdi_set(host, &data) == 0)	/* Wait HDI set   */
+		return 0;
+	*ptr = inb(host->base + ORC_HDATA);
+	outb(data, host->base + ORC_HSTUS);	/* Clear HDI    */
+
+	return 1;
+
+}
+
+/**
+ *	orc_exec_scb		-	Queue an SCB with the HA
+ *	@host: host adapter the SCB belongs to
+ *	@scb: SCB to queue for execution
+ */
+
+static void orc_exec_scb(struct orc_host * host, struct orc_scb * scb)
+{
+	scb->status = ORCSCB_POST;
+	outb(scb->scbidx, host->base + ORC_PQUEUE);
+}
+
+
+/**
+ *	se2_rd_all	-	read SCSI parameters from EEPROM
+ *	@host: Host whose EEPROM is being loaded
+ *
+ *	Read SCSI H/A configuration parameters from serial EEPROM
+ */
+
+static int se2_rd_all(struct orc_host * host)
+{
+	int i;
+	u8 *np, chksum = 0;
+
+	np = (u8 *) nvramp;
+	for (i = 0; i < 64; i++, np++) {	/* <01> */
+		if (orc_nv_read(host, (u8) i, np) == 0)
+			return -1;
+	}
+
+	/*------ Is ckecksum ok ? ------*/
+	np = (u8 *) nvramp;
+	for (i = 0; i < 63; i++)
+		chksum += *np++;
+
+	if (nvramp->CheckSum != (u8) chksum)
+		return -1;
+	return 1;
+}
+
+/**
+ *	se2_update_all		-	update the EEPROM
+ *	@host: Host whose EEPROM is being updated
+ *
+ *	Update changed bytes in the EEPROM image.
+ */
+
+static void se2_update_all(struct orc_host * host)
+{				/* setup default pattern  */
+	int i;
+	u8 *np, *np1, chksum = 0;
+
+	/* Calculate checksum first   */
+	np = (u8 *) default_nvram;
+	for (i = 0; i < 63; i++)
+		chksum += *np++;
+	*np = chksum;
+
+	np = (u8 *) default_nvram;
+	np1 = (u8 *) nvramp;
+	for (i = 0; i < 64; i++, np++, np1++) {
+		if (*np != *np1)
+			orc_nv_write(host, (u8) i, *np);
+	}
+}
+
+/**
+ *	read_eeprom		-	load EEPROM
+ *	@host: Host EEPROM to read
+ *
+ *	Read the EEPROM for a given host. If it is invalid or fails
+ *	the restore the defaults and use them.
+ */
+
+static void read_eeprom(struct orc_host * host)
+{
+	if (se2_rd_all(host) != 1) {
+		se2_update_all(host);	/* setup default pattern        */
+		se2_rd_all(host);	/* load again                   */
+	}
+}
+
+
+/**
+ *	orc_load_firmware	-	initialise firmware
+ *	@host: Host to set up
+ *
+ *	Load the firmware from the EEPROM into controller SRAM. This
+ *	is basically a 4K block copy and then a 4K block read to check
+ *	correctness. The rest is convulted by the indirect interfaces
+ *	in the hardware
+ */
+
+static u8 orc_load_firmware(struct orc_host * host)
+{
+	u32 data32;
+	u16 bios_addr;
+	u16 i;
+	u8 *data32_ptr, data;
+
+
+	/* Set up the EEPROM for access */
+
+	data = inb(host->base + ORC_GCFG);
+	outb(data | EEPRG, host->base + ORC_GCFG);	/* Enable EEPROM programming */
+	outb(0x00, host->base + ORC_EBIOSADR2);
+	outw(0x0000, host->base + ORC_EBIOSADR0);
+	if (inb(host->base + ORC_EBIOSDATA) != 0x55) {
+		outb(data, host->base + ORC_GCFG);	/* Disable EEPROM programming */
+		return 0;
+	}
+	outw(0x0001, host->base + ORC_EBIOSADR0);
+	if (inb(host->base + ORC_EBIOSDATA) != 0xAA) {
+		outb(data, host->base + ORC_GCFG);	/* Disable EEPROM programming */
+		return 0;
+	}
+
+	outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL);	/* Enable SRAM programming */
+	data32_ptr = (u8 *) & data32;
+	data32 = cpu_to_le32(0);		/* Initial FW address to 0 */
+	outw(0x0010, host->base + ORC_EBIOSADR0);
+	*data32_ptr = inb(host->base + ORC_EBIOSDATA);		/* Read from BIOS */
+	outw(0x0011, host->base + ORC_EBIOSADR0);
+	*(data32_ptr + 1) = inb(host->base + ORC_EBIOSDATA);	/* Read from BIOS */
+	outw(0x0012, host->base + ORC_EBIOSADR0);
+	*(data32_ptr + 2) = inb(host->base + ORC_EBIOSDATA);	/* Read from BIOS */
+	outw(*(data32_ptr + 2), host->base + ORC_EBIOSADR2);
+	outl(le32_to_cpu(data32), host->base + ORC_FWBASEADR);		/* Write FW address */
+
+	/* Copy the code from the BIOS to the SRAM */
+
+	udelay(500);	/* Required on Sun Ultra 5 ... 350 -> failures */
+	bios_addr = (u16) le32_to_cpu(data32);	/* FW code locate at BIOS address + ? */
+	for (i = 0, data32_ptr = (u8 *) & data32;	/* Download the code    */
+	     i < 0x1000;	/* Firmware code size = 4K      */
+	     i++, bios_addr++) {
+		outw(bios_addr, host->base + ORC_EBIOSADR0);
+		*data32_ptr++ = inb(host->base + ORC_EBIOSDATA);	/* Read from BIOS */
+		if ((i % 4) == 3) {
+			outl(le32_to_cpu(data32), host->base + ORC_RISCRAM);	/* Write every 4 bytes */
+			data32_ptr = (u8 *) & data32;
+		}
+	}
+
+	/* Go back and check they match */
+
+	outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL);	/* Reset program count 0 */
+	bios_addr -= 0x1000;	/* Reset the BIOS address */
+	for (i = 0, data32_ptr = (u8 *) & data32;	/* Check the code       */
+	     i < 0x1000;	/* Firmware code size = 4K      */
+	     i++, bios_addr++) {
+		outw(bios_addr, host->base + ORC_EBIOSADR0);
+		*data32_ptr++ = inb(host->base + ORC_EBIOSDATA);	/* Read from BIOS */
+		if ((i % 4) == 3) {
+			if (inl(host->base + ORC_RISCRAM) != le32_to_cpu(data32)) {
+				outb(PRGMRST, host->base + ORC_RISCCTL);	/* Reset program to 0 */
+				outb(data, host->base + ORC_GCFG);	/*Disable EEPROM programming */
+				return 0;
+			}
+			data32_ptr = (u8 *) & data32;
+		}
+	}
+
+	/* Success */
+	outb(PRGMRST, host->base + ORC_RISCCTL);	/* Reset program to 0   */
+	outb(data, host->base + ORC_GCFG);	/* Disable EEPROM programming */
+	return 1;
+}
+
+/***************************************************************************/
+static void setup_SCBs(struct orc_host * host)
+{
+	struct orc_scb *scb;
+	int i;
+	struct orc_extended_scb *escb;
+	dma_addr_t escb_phys;
+
+	/* Setup SCB base and SCB Size registers */
+	outb(ORC_MAXQUEUE, host->base + ORC_SCBSIZE);	/* Total number of SCBs */
+	/* SCB base address 0      */
+	outl(host->scb_phys, host->base + ORC_SCBBASE0);
+	/* SCB base address 1      */
+	outl(host->scb_phys, host->base + ORC_SCBBASE1);
+
+	/* setup scatter list address with one buffer */
+	scb = host->scb_virt;
+	escb = host->escb_virt;
+
+	for (i = 0; i < ORC_MAXQUEUE; i++) {
+		escb_phys = (host->escb_phys + (sizeof(struct orc_extended_scb) * i));
+		scb->sg_addr = cpu_to_le32((u32) escb_phys);
+		scb->sense_addr = cpu_to_le32((u32) escb_phys);
+		scb->escb = escb;
+		scb->scbidx = i;
+		scb++;
+		escb++;
+	}
+}
+
+/**
+ *	init_alloc_map		-	initialise allocation map
+ *	@host: host map to configure
+ *
+ *	Initialise the allocation maps for this device. If the device
+ *	is not quiescent the caller must hold the allocation lock
+ */
+
+static void init_alloc_map(struct orc_host * host)
+{
+	u8 i, j;
+
+	for (i = 0; i < MAX_CHANNELS; i++) {
+		for (j = 0; j < 8; j++) {
+			host->allocation_map[i][j] = 0xffffffff;
+		}
+	}
+}
+
+/**
+ *	init_orchid		-	initialise the host adapter
+ *	@host:host adapter to initialise
+ *
+ *	Initialise the controller and if necessary load the firmware.
+ *
+ *	Returns -1 if the initialisation fails.
+ */
+
+static int init_orchid(struct orc_host * host)
+{
+	u8 *ptr;
+	u16 revision;
+	u8 i;
+
+	init_alloc_map(host);
+	outb(0xFF, host->base + ORC_GIMSK);	/* Disable all interrupts */
+
+	if (inb(host->base + ORC_HSTUS) & RREADY) {	/* Orchid is ready */
+		revision = orc_read_fwrev(host);
+		if (revision == 0xFFFF) {
+			outb(DEVRST, host->base + ORC_HCTRL);	/* Reset Host Adapter   */
+			if (wait_chip_ready(host) == 0)
+				return -1;
+			orc_load_firmware(host);	/* Download FW                  */
+			setup_SCBs(host);	/* Setup SCB base and SCB Size registers */
+			outb(0x00, host->base + ORC_HCTRL);	/* clear HOSTSTOP       */
+			if (wait_firmware_ready(host) == 0)
+				return -1;
+			/* Wait for firmware ready     */
+		} else {
+			setup_SCBs(host);	/* Setup SCB base and SCB Size registers */
+		}
+	} else {		/* Orchid is not Ready          */
+		outb(DEVRST, host->base + ORC_HCTRL);	/* Reset Host Adapter   */
+		if (wait_chip_ready(host) == 0)
+			return -1;
+		orc_load_firmware(host);	/* Download FW                  */
+		setup_SCBs(host);	/* Setup SCB base and SCB Size registers */
+		outb(HDO, host->base + ORC_HCTRL);	/* Do Hardware Reset &  */
+
+		/*     clear HOSTSTOP  */
+		if (wait_firmware_ready(host) == 0)		/* Wait for firmware ready      */
+			return -1;
+	}
+
+	/* Load an EEProm copy into RAM */
+	/* Assumes single threaded at this point */
+	read_eeprom(host);
+
+	if (nvramp->revision != 1)
+		return -1;
+
+	host->scsi_id = nvramp->scsi_id;
+	host->BIOScfg = nvramp->BIOSConfig1;
+	host->max_targets = MAX_TARGETS;
+	ptr = (u8 *) & (nvramp->Target00Config);
+	for (i = 0; i < 16; ptr++, i++) {
+		host->target_flag[i] = *ptr;
+		host->max_tags[i] = ORC_MAXTAGS;
+	}
+
+	if (nvramp->SCSI0Config & NCC_BUSRESET)
+		host->flags |= HCF_SCSI_RESET;
+	outb(0xFB, host->base + ORC_GIMSK);	/* enable RP FIFO interrupt     */
+	return 0;
+}
+
+/**
+ *	orc_reset_scsi_bus		-	perform bus reset
+ *	@host: host being reset
+ *
+ *	Perform a full bus reset on the adapter.
+ */
+
+static int orc_reset_scsi_bus(struct orc_host * host)
+{				/* I need Host Control Block Information */
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->allocation_lock, flags);
+
+	init_alloc_map(host);
+	/* reset scsi bus */
+	outb(SCSIRST, host->base + ORC_HCTRL);
+	/* FIXME: We can spend up to a second with the lock held and
+	   interrupts off here */
+	if (wait_scsi_reset_done(host) == 0) {
+		spin_unlock_irqrestore(&host->allocation_lock, flags);
+		return FAILED;
+	} else {
+		spin_unlock_irqrestore(&host->allocation_lock, flags);
+		return SUCCESS;
+	}
+}
+
+/**
+ *	orc_device_reset	-	device reset handler
+ *	@host: host to reset
+ *	@cmd: command causing the reset
+ *	@target: target device
+ *
+ *	Reset registers, reset a hanging bus and kill active and disconnected
+ *	commands for target w/o soft reset
+ */
+
+static int orc_device_reset(struct orc_host * host, struct scsi_cmnd *cmd, unsigned int target)
+{				/* I need Host Control Block Information */
+	struct orc_scb *scb;
+	struct orc_extended_scb *escb;
+	struct orc_scb *host_scb;
+	u8 i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&(host->allocation_lock), flags);
+	scb = (struct orc_scb *) NULL;
+	escb = (struct orc_extended_scb *) NULL;
+
+	/* setup scatter list address with one buffer */
+	host_scb = host->scb_virt;
+
+	/* FIXME: is this safe if we then fail to issue the reset or race
+	   a completion ? */
+	init_alloc_map(host);
+
+	/* Find the scb corresponding to the command */
+	for (i = 0; i < ORC_MAXQUEUE; i++) {
+		escb = host_scb->escb;
+		if (host_scb->status && escb->srb == cmd)
+			break;
+		host_scb++;
+	}
+
+	if (i == ORC_MAXQUEUE) {
+		printk(KERN_ERR "Unable to Reset - No SCB Found\n");
+		spin_unlock_irqrestore(&(host->allocation_lock), flags);
+		return FAILED;
+	}
+
+	/* Allocate a new SCB for the reset command to the firmware */
+	if ((scb = __orc_alloc_scb(host)) == NULL) {
+		/* Can't happen.. */
+		spin_unlock_irqrestore(&(host->allocation_lock), flags);
+		return FAILED;
+	}
+
+	/* Reset device is handled by the firmware, we fill in an SCB and
+	   fire it at the controller, it does the rest */
+	scb->opcode = ORC_BUSDEVRST;
+	scb->target = target;
+	scb->hastat = 0;
+	scb->tastat = 0;
+	scb->status = 0x0;
+	scb->link = 0xFF;
+	scb->reserved0 = 0;
+	scb->reserved1 = 0;
+	scb->xferlen = cpu_to_le32(0);
+	scb->sg_len = cpu_to_le32(0);
+
+	escb->srb = NULL;
+	escb->srb = cmd;
+	orc_exec_scb(host, scb);	/* Start execute SCB            */
+	spin_unlock_irqrestore(&host->allocation_lock, flags);
+	return SUCCESS;
+}
+
+/**
+ *	__orc_alloc_scb		-		allocate an SCB
+ *	@host: host to allocate from
+ *
+ *	Allocate an SCB and return a pointer to the SCB object. NULL
+ *	is returned if no SCB is free. The caller must already hold
+ *	the allocator lock at this point.
+ */
+
+
+static struct orc_scb *__orc_alloc_scb(struct orc_host * host)
+{
+	u8 channel;
+	unsigned long idx;
+	u8 index;
+	u8 i;
+
+	channel = host->index;
+	for (i = 0; i < 8; i++) {
+		for (index = 0; index < 32; index++) {
+			if ((host->allocation_map[channel][i] >> index) & 0x01) {
+				host->allocation_map[channel][i] &= ~(1 << index);
+				idx = index + 32 * i;
+				/*
+				 * Translate the index to a structure instance
+				 */
+				return host->scb_virt + idx;
+			}
+		}
+	}
+	return NULL;
+}
+
+/**
+ *	orc_alloc_scb		-		allocate an SCB
+ *	@host: host to allocate from
+ *
+ *	Allocate an SCB and return a pointer to the SCB object. NULL
+ *	is returned if no SCB is free.
+ */
+
+static struct orc_scb *orc_alloc_scb(struct orc_host * host)
+{
+	struct orc_scb *scb;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->allocation_lock, flags);
+	scb = __orc_alloc_scb(host);
+	spin_unlock_irqrestore(&host->allocation_lock, flags);
+	return scb;
+}
+
+/**
+ *	orc_release_scb			-	release an SCB
+ *	@host: host owning the SCB
+ *	@scb: SCB that is now free
+ *
+ *	Called to return a completed SCB to the allocation pool. Before
+ *	calling the SCB must be out of use on both the host and the HA.
+ */
+
+static void orc_release_scb(struct orc_host *host, struct orc_scb *scb)
+{
+	unsigned long flags;
+	u8 index, i, channel;
+
+	spin_lock_irqsave(&(host->allocation_lock), flags);
+	channel = host->index;	/* Channel */
+	index = scb->scbidx;
+	i = index / 32;
+	index %= 32;
+	host->allocation_map[channel][i] |= (1 << index);
+	spin_unlock_irqrestore(&(host->allocation_lock), flags);
+}
+
+/*
+ *	orchid_abort_scb	-	abort a command
+ *
+ *	Abort a queued command that has been passed to the firmware layer
+ *	if possible. This is all handled by the firmware. We aks the firmware
+ *	and it either aborts the command or fails
+ */
+
+static int orchid_abort_scb(struct orc_host * host, struct orc_scb * scb)
+{
+	unsigned char data, status;
+
+	outb(ORC_CMD_ABORT_SCB, host->base + ORC_HDATA);	/* Write command */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	outb(scb->scbidx, host->base + ORC_HDATA);	/* Write address */
+	outb(HDO, host->base + ORC_HCTRL);
+	if (wait_HDO_off(host) == 0)	/* Wait HDO off   */
+		return 0;
+
+	if (wait_hdi_set(host, &data) == 0)	/* Wait HDI set   */
+		return 0;
+	status = inb(host->base + ORC_HDATA);
+	outb(data, host->base + ORC_HSTUS);	/* Clear HDI    */
+
+	if (status == 1)	/* 0 - Successfully               */
+		return 0;	/* 1 - Fail                     */
+	return 1;
+}
+
+static int inia100_abort_cmd(struct orc_host * host, struct scsi_cmnd *cmd)
+{
+	struct orc_extended_scb *escb;
+	struct orc_scb *scb;
+	u8 i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&(host->allocation_lock), flags);
+
+	scb = host->scb_virt;
+
+	/* Walk the queue until we find the SCB that belongs to the command
+	   block. This isn't a performance critical path so a walk in the park
+	   here does no harm */
+
+	for (i = 0; i < ORC_MAXQUEUE; i++, scb++) {
+		escb = scb->escb;
+		if (scb->status && escb->srb == cmd) {
+			if (scb->tag_msg == 0) {
+				goto out;
+			} else {
+				/* Issue an ABORT to the firmware */
+				if (orchid_abort_scb(host, scb)) {
+					escb->srb = NULL;
+					spin_unlock_irqrestore(&host->allocation_lock, flags);
+					return SUCCESS;
+				} else
+					goto out;
+			}
+		}
+	}
+out:
+	spin_unlock_irqrestore(&host->allocation_lock, flags);
+	return FAILED;
+}
+
+/**
+ *	orc_interrupt		-	IRQ processing
+ *	@host: Host causing the interrupt
+ *
+ *	This function is called from the IRQ handler and protected
+ *	by the host lock. While the controller reports that there are
+ *	scb's for processing we pull them off the controller, turn the
+ *	index into a host address pointer to the scb and call the scb
+ *	handler.
+ *
+ *	Returns IRQ_HANDLED if any SCBs were processed, IRQ_NONE otherwise
+ */
+
+static irqreturn_t orc_interrupt(struct orc_host * host)
+{
+	u8 scb_index;
+	struct orc_scb *scb;
+
+	/* Check if we have an SCB queued for servicing */
+	if (inb(host->base + ORC_RQUEUECNT) == 0)
+		return IRQ_NONE;
+
+	do {
+		/* Get the SCB index of the SCB to service */
+		scb_index = inb(host->base + ORC_RQUEUE);
+
+		/* Translate it back to a host pointer */
+		scb = (struct orc_scb *) ((unsigned long) host->scb_virt + (unsigned long) (sizeof(struct orc_scb) * scb_index));
+		scb->status = 0x0;
+		/* Process the SCB */
+		inia100_scb_handler(host, scb);
+	} while (inb(host->base + ORC_RQUEUECNT));
+	return IRQ_HANDLED;
+}				/* End of I1060Interrupt() */
+
+/**
+ *	inia100_build_scb	-	build SCB
+ *	@host: host owing the control block
+ *	@scb: control block to use
+ *	@cmd: Mid layer command
+ *
+ *	Build a host adapter control block from the SCSI mid layer command
+ */
+
+static int inia100_build_scb(struct orc_host * host, struct orc_scb * scb, struct scsi_cmnd * cmd)
+{				/* Create corresponding SCB     */
+	struct scatterlist *sg;
+	struct orc_sgent *sgent;		/* Pointer to SG list           */
+	int i, count_sg;
+	struct orc_extended_scb *escb;
+
+	/* Links between the escb, scb and Linux scsi midlayer cmd */
+	escb = scb->escb;
+	escb->srb = cmd;
+	sgent = NULL;
+
+	/* Set up the SCB to do a SCSI command block */
+	scb->opcode = ORC_EXECSCSI;
+	scb->flags = SCF_NO_DCHK;	/* Clear done bit               */
+	scb->target = cmd->device->id;
+	scb->lun = cmd->device->lun;
+	scb->reserved0 = 0;
+	scb->reserved1 = 0;
+	scb->sg_len = cpu_to_le32(0);
+
+	scb->xferlen = cpu_to_le32((u32) scsi_bufflen(cmd));
+	sgent = (struct orc_sgent *) & escb->sglist[0];
+
+	count_sg = scsi_dma_map(cmd);
+	if (count_sg < 0)
+		return count_sg;
+	BUG_ON(count_sg > TOTAL_SG_ENTRY);
+
+	/* Build the scatter gather lists */
+	if (count_sg) {
+		scb->sg_len = cpu_to_le32((u32) (count_sg * 8));
+		scsi_for_each_sg(cmd, sg, count_sg, i) {
+			sgent->base = cpu_to_le32((u32) sg_dma_address(sg));
+			sgent->length = cpu_to_le32((u32) sg_dma_len(sg));
+			sgent++;
+		}
+	} else {
+		scb->sg_len = cpu_to_le32(0);
+		sgent->base = cpu_to_le32(0);
+		sgent->length = cpu_to_le32(0);
+	}
+	scb->sg_addr = (u32) scb->sense_addr;	/* sense_addr is already little endian */
+	scb->hastat = 0;
+	scb->tastat = 0;
+	scb->link = 0xFF;
+	scb->sense_len = SENSE_SIZE;
+	scb->cdb_len = cmd->cmd_len;
+	if (scb->cdb_len >= IMAX_CDB) {
+		printk("max cdb length= %x\n", cmd->cmd_len);
+		scb->cdb_len = IMAX_CDB;
+	}
+	scb->ident = (u8)(cmd->device->lun & 0xff) | DISC_ALLOW;
+	if (cmd->device->tagged_supported) {	/* Tag Support                  */
+		scb->tag_msg = SIMPLE_QUEUE_TAG;	/* Do simple tag only   */
+	} else {
+		scb->tag_msg = 0;	/* No tag support               */
+	}
+	memcpy(scb->cdb, cmd->cmnd, scb->cdb_len);
+	return 0;
+}
+
+/**
+ *	inia100_queue_lck		-	queue command with host
+ *	@cmd: Command block
+ *
+ *	Called by the mid layer to queue a command. Process the command
+ *	block, build the host specific scb structures and if there is room
+ *	queue the command down to the controller
+ */
+static int inia100_queue_lck(struct scsi_cmnd *cmd)
+{
+	struct orc_scb *scb;
+	struct orc_host *host;		/* Point to Host adapter control block */
+
+	host = (struct orc_host *) cmd->device->host->hostdata;
+	/* Get free SCSI control block  */
+	if ((scb = orc_alloc_scb(host)) == NULL)
+		return SCSI_MLQUEUE_HOST_BUSY;
+
+	if (inia100_build_scb(host, scb, cmd)) {
+		orc_release_scb(host, scb);
+		return SCSI_MLQUEUE_HOST_BUSY;
+	}
+	orc_exec_scb(host, scb);	/* Start execute SCB            */
+	return 0;
+}
+
+static DEF_SCSI_QCMD(inia100_queue)
+
+/*****************************************************************************
+ Function name  : inia100_abort
+ Description    : Abort a queued command.
+	                 (commands that are on the bus can't be aborted easily)
+ Input          : host  -       Pointer to host adapter structure
+ Output         : None.
+ Return         : pSRB  -       Pointer to SCSI request block.
+*****************************************************************************/
+static int inia100_abort(struct scsi_cmnd * cmd)
+{
+	struct orc_host *host;
+
+	host = (struct orc_host *) cmd->device->host->hostdata;
+	return inia100_abort_cmd(host, cmd);
+}
+
+/*****************************************************************************
+ Function name  : inia100_reset
+ Description    : Reset registers, reset a hanging bus and
+                  kill active and disconnected commands for target w/o soft reset
+ Input          : host  -       Pointer to host adapter structure
+ Output         : None.
+ Return         : pSRB  -       Pointer to SCSI request block.
+*****************************************************************************/
+static int inia100_bus_reset(struct scsi_cmnd * cmd)
+{				/* I need Host Control Block Information */
+	struct orc_host *host;
+	host = (struct orc_host *) cmd->device->host->hostdata;
+	return orc_reset_scsi_bus(host);
+}
+
+/*****************************************************************************
+ Function name  : inia100_device_reset
+ Description    : Reset the device
+ Input          : host  -       Pointer to host adapter structure
+ Output         : None.
+ Return         : pSRB  -       Pointer to SCSI request block.
+*****************************************************************************/
+static int inia100_device_reset(struct scsi_cmnd * cmd)
+{				/* I need Host Control Block Information */
+	struct orc_host *host;
+	host = (struct orc_host *) cmd->device->host->hostdata;
+	return orc_device_reset(host, cmd, scmd_id(cmd));
+
+}
+
+/**
+ *	inia100_scb_handler	-	interrupt callback
+ *	@host: Host causing the interrupt
+ *	@scb: SCB the controller returned as needing processing
+ *
+ *	Perform completion processing on a control block. Do the conversions
+ *	from host to SCSI midlayer error coding, save any sense data and
+ *	the complete with the midlayer and recycle the scb.
+ */
+
+static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb)
+{
+	struct scsi_cmnd *cmd;	/* Pointer to SCSI request block */
+	struct orc_extended_scb *escb;
+
+	escb = scb->escb;
+	if ((cmd = (struct scsi_cmnd *) escb->srb) == NULL) {
+		printk(KERN_ERR "inia100_scb_handler: SRB pointer is empty\n");
+		orc_release_scb(host, scb);	/* Release SCB for current channel */
+		return;
+	}
+	escb->srb = NULL;
+
+	switch (scb->hastat) {
+	case 0x0:
+	case 0xa:		/* Linked command complete without error and linked normally */
+	case 0xb:		/* Linked command complete without error interrupt generated */
+		scb->hastat = 0;
+		break;
+
+	case 0x11:		/* Selection time out-The initiator selection or target
+				   reselection was not complete within the SCSI Time out period */
+		scb->hastat = DID_TIME_OUT;
+		break;
+
+	case 0x14:		/* Target bus phase sequence failure-An invalid bus phase or bus
+				   phase sequence was requested by the target. The host adapter
+				   will generate a SCSI Reset Condition, notifying the host with
+				   a SCRD interrupt */
+		scb->hastat = DID_RESET;
+		break;
+
+	case 0x1a:		/* SCB Aborted. 07/21/98 */
+		scb->hastat = DID_ABORT;
+		break;
+
+	case 0x12:		/* Data overrun/underrun-The target attempted to transfer more data
+				   than was allocated by the Data Length field or the sum of the
+				   Scatter / Gather Data Length fields. */
+	case 0x13:		/* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
+	case 0x16:		/* Invalid CCB Operation Code-The first byte of the CCB was invalid. */
+
+	default:
+		printk(KERN_DEBUG "inia100: %x %x\n", scb->hastat, scb->tastat);
+		scb->hastat = DID_ERROR;	/* Couldn't find any better */
+		break;
+	}
+
+	if (scb->tastat == 2) {	/* Check condition              */
+		memcpy((unsigned char *) &cmd->sense_buffer[0],
+		   (unsigned char *) &escb->sglist[0], SENSE_SIZE);
+	}
+	cmd->result = scb->tastat | (scb->hastat << 16);
+	scsi_dma_unmap(cmd);
+	scsi_done(cmd);		/* Notify system DONE           */
+	orc_release_scb(host, scb);	/* Release SCB for current channel */
+}
+
+/**
+ *	inia100_intr		-	interrupt handler
+ *	@irqno: Interrupt value
+ *	@devid: Host adapter
+ *
+ *	Entry point for IRQ handling. All the real work is performed
+ *	by orc_interrupt.
+ */
+static irqreturn_t inia100_intr(int irqno, void *devid)
+{
+	struct Scsi_Host *shost = (struct Scsi_Host *)devid;
+	struct orc_host *host = (struct orc_host *)shost->hostdata;
+	unsigned long flags;
+	irqreturn_t res;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	res = orc_interrupt(host);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	return res;
+}
+
+static const struct scsi_host_template inia100_template = {
+	.proc_name		= "inia100",
+	.name			= inia100_REVID,
+	.queuecommand		= inia100_queue,
+	.eh_abort_handler	= inia100_abort,
+	.eh_bus_reset_handler	= inia100_bus_reset,
+	.eh_device_reset_handler = inia100_device_reset,
+	.can_queue		= 1,
+	.this_id		= 1,
+	.sg_tablesize		= SG_ALL,
+};
+
+static int inia100_probe_one(struct pci_dev *pdev,
+			     const struct pci_device_id *id)
+{
+	struct Scsi_Host *shost;
+	struct orc_host *host;
+	unsigned long port, bios;
+	int error = -ENODEV;
+	u32 sz;
+
+	if (pci_enable_device(pdev))
+		goto out;
+	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
+		printk(KERN_WARNING "Unable to set 32bit DMA "
+				    "on inia100 adapter, ignoring.\n");
+		goto out_disable_device;
+	}
+
+	pci_set_master(pdev);
+
+	port = pci_resource_start(pdev, 0);
+	if (!request_region(port, 256, "inia100")) {
+		printk(KERN_WARNING "inia100: io port 0x%lx, is busy.\n", port);
+		goto out_disable_device;
+	}
+
+	/* <02> read from base address + 0x50 offset to get the bios value. */
+	bios = inw(port + 0x50);
+
+
+	shost = scsi_host_alloc(&inia100_template, sizeof(struct orc_host));
+	if (!shost)
+		goto out_release_region;
+
+	host = (struct orc_host *)shost->hostdata;
+	host->pdev = pdev;
+	host->base = port;
+	host->BIOScfg = bios;
+	spin_lock_init(&host->allocation_lock);
+
+	/* Get total memory needed for SCB */
+	sz = ORC_MAXQUEUE * sizeof(struct orc_scb);
+	host->scb_virt = dma_alloc_coherent(&pdev->dev, sz, &host->scb_phys,
+					    GFP_KERNEL);
+	if (!host->scb_virt) {
+		printk("inia100: SCB memory allocation error\n");
+		goto out_host_put;
+	}
+
+	/* Get total memory needed for ESCB */
+	sz = ORC_MAXQUEUE * sizeof(struct orc_extended_scb);
+	host->escb_virt = dma_alloc_coherent(&pdev->dev, sz, &host->escb_phys,
+					     GFP_KERNEL);
+	if (!host->escb_virt) {
+		printk("inia100: ESCB memory allocation error\n");
+		goto out_free_scb_array;
+	}
+
+	if (init_orchid(host)) {	/* Initialize orchid chip */
+		printk("inia100: initial orchid fail!!\n");
+		goto out_free_escb_array;
+	}
+
+	shost->io_port = host->base;
+	shost->n_io_port = 0xff;
+	shost->can_queue = ORC_MAXQUEUE;
+	shost->unique_id = shost->io_port;
+	shost->max_id = host->max_targets;
+	shost->max_lun = 16;
+	shost->irq = pdev->irq;
+	shost->this_id = host->scsi_id;	/* Assign HCS index */
+	shost->sg_tablesize = TOTAL_SG_ENTRY;
+
+	/* Initial orc chip           */
+	error = request_irq(pdev->irq, inia100_intr, IRQF_SHARED,
+			"inia100", shost);
+	if (error < 0) {
+		printk(KERN_WARNING "inia100: unable to get irq %d\n",
+				pdev->irq);
+		goto out_free_escb_array;
+	}
+
+	pci_set_drvdata(pdev, shost);
+
+	error = scsi_add_host(shost, &pdev->dev);
+	if (error)
+		goto out_free_irq;
+
+	scsi_scan_host(shost);
+	return 0;
+
+out_free_irq:
+        free_irq(shost->irq, shost);
+out_free_escb_array:
+	dma_free_coherent(&pdev->dev,
+			ORC_MAXQUEUE * sizeof(struct orc_extended_scb),
+			host->escb_virt, host->escb_phys);
+out_free_scb_array:
+	dma_free_coherent(&pdev->dev,
+			ORC_MAXQUEUE * sizeof(struct orc_scb),
+			host->scb_virt, host->scb_phys);
+out_host_put:
+	scsi_host_put(shost);
+out_release_region:
+        release_region(port, 256);
+out_disable_device:
+	pci_disable_device(pdev);
+out:
+	return error;
+}
+
+static void inia100_remove_one(struct pci_dev *pdev)
+{
+	struct Scsi_Host *shost = pci_get_drvdata(pdev);
+	struct orc_host *host = (struct orc_host *)shost->hostdata;
+
+	scsi_remove_host(shost);
+
+        free_irq(shost->irq, shost);
+	dma_free_coherent(&pdev->dev,
+			ORC_MAXQUEUE * sizeof(struct orc_extended_scb),
+			host->escb_virt, host->escb_phys);
+	dma_free_coherent(&pdev->dev,
+			ORC_MAXQUEUE * sizeof(struct orc_scb),
+			host->scb_virt, host->scb_phys);
+        release_region(shost->io_port, 256);
+
+	scsi_host_put(shost);
+} 
+
+static struct pci_device_id inia100_pci_tbl[] = {
+	{PCI_VENDOR_ID_INIT, 0x1060, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{0,}
+};
+MODULE_DEVICE_TABLE(pci, inia100_pci_tbl);
+
+static struct pci_driver inia100_pci_driver = {
+	.name		= "inia100",
+	.id_table	= inia100_pci_tbl,
+	.probe		= inia100_probe_one,
+	.remove		= inia100_remove_one,
+};
+
+module_pci_driver(inia100_pci_driver);
+
+MODULE_DESCRIPTION("Initio A100U2W SCSI driver");
+MODULE_AUTHOR("Initio Corporation");
+MODULE_LICENSE("Dual BSD/GPL");