Import of Linux/MIPS 2.1.14

1 files changed, 1758 insertions, 0 deletions

diff --git a/drivers/scsi/qlogicisp.c b/drivers/scsi/qlogicisp.c
new file mode 100644
index 000000000..324969f7d
--- /dev/null
+++ b/drivers/scsi/qlogicisp.c
@@ -0,0 +1,1758 @@
+/*
+ * QLogic ISP1020 Intelligent SCSI Processor Driver (PCI)
+ * Written by Erik H. Moe, ehm@cris.com
+ * Copyright 1995, Erik H. Moe
+ *
+ * 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.
+ */
+
+/* Renamed and updated to 1.3.x by Michael Griffith <grif@cs.ucr.edu> */
+
+/*
+ * $Date: 1995/09/22 02:23:15 $
+ * $Revision: 0.5 $
+ *
+ * $Log: isp1020.c,v $
+ * Revision 0.5  1995/09/22  02:23:15  root
+ * do auto request sense
+ *
+ * Revision 0.4  1995/08/07  04:44:33  root
+ * supply firmware with driver.
+ * numerous bug fixes/general cleanup of code.
+ *
+ * Revision 0.3  1995/07/16  16:15:39  root
+ * added reset/abort code.
+ *
+ * Revision 0.2  1995/06/29  03:14:19  root
+ * fixed biosparam.
+ * added queue protocol.
+ *
+ * Revision 0.1  1995/06/25  01:55:45  root
+ * Initial release.
+ *
+ */
+
+#include <linux/blk.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/bios32.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include "sd.h"
+#include "hosts.h"
+#include "qlogicisp.h"
+
+/* Configuration section *****************************************************/
+
+/* Set the following macro to 1 to reload the ISP1020's firmware.  This is
+   the latest firmware provided by QLogic.  This may be an earlier/later
+   revision than supplied by your board. */
+
+#define RELOAD_FIRMWARE		1
+
+/* Set the following macro to 1 to reload the ISP1020's defaults from nvram.
+   If you are not sure of your settings, leave this alone, the driver will
+   use a set of 'safe' defaults */
+
+#define USE_NVRAM_DEFAULTS	0
+
+/*  Macros used for debugging */
+
+#define DEBUG_ISP1020		0
+#define DEBUG_ISP1020_INT	0
+#define DEBUG_ISP1020_SETUP	0
+#define TRACE_ISP		0
+
+#define DEFAULT_LOOP_COUNT	1000000
+
+/* End Configuration section *************************************************/
+
+#include <linux/module.h>
+
+#if TRACE_ISP
+
+# define TRACE_BUF_LEN	(32*1024)
+
+struct {
+	u_long		next;
+	struct {
+		u_long		time;
+		u_int		index;
+		u_int		addr;
+		u_char *	name;
+	} buf[TRACE_BUF_LEN];
+} trace;
+
+#define TRACE(w, i, a)						\
+{								\
+	unsigned long flags;					\
+								\
+	save_flags(flags);					\
+	cli();							\
+	trace.buf[trace.next].name  = (w);			\
+	trace.buf[trace.next].time  = jiffies;			\
+	trace.buf[trace.next].index = (i);			\
+	trace.buf[trace.next].addr  = (long) (a);		\
+	trace.next = (trace.next + 1) & (TRACE_BUF_LEN - 1);	\
+	restore_flags(flags);					\
+}
+
+#else
+# define TRACE(w, i, a)
+#endif
+
+#if DEBUG_ISP1020
+#define ENTER(x)	printk("isp1020 : entering %s()\n", x);
+#define LEAVE(x)	printk("isp1020 : leaving %s()\n", x);
+#define DEBUG(x)	x
+#else
+#define ENTER(x)
+#define LEAVE(x)
+#define DEBUG(x)
+#endif /* DEBUG_ISP1020 */
+
+#if DEBUG_ISP1020_INTR
+#define ENTER_INTR(x)	printk("isp1020 : entering %s()\n", x);
+#define LEAVE_INTR(x)	printk("isp1020 : leaving %s()\n", x);
+#define DEBUG_INTR(x)	x
+#else
+#define ENTER_INTR(x)
+#define LEAVE_INTR(x)
+#define DEBUG_INTR(x)
+#endif /* DEBUG ISP1020_INTR */
+
+#define ISP1020_REV_ID	1
+
+#define MAX_TARGETS	16
+#define MAX_LUNS	8
+
+/* host configuration and control registers */
+#define HOST_HCCR	0xc0	/* host command and control */
+
+/* pci bus interface registers */
+#define PCI_ID_LOW	0x00	/* vendor id */
+#define PCI_ID_HIGH	0x02	/* device id */
+#define ISP_CFG0	0x04	/* configuration register #0 */
+#define ISP_CFG1	0x06	/* configuration register #1 */
+#define PCI_INTF_CTL	0x08	/* pci interface control */
+#define PCI_INTF_STS	0x0a	/* pci interface status */
+#define PCI_SEMAPHORE	0x0c	/* pci semaphore */
+#define PCI_NVRAM	0x0e	/* pci nvram interface */
+
+/* mailbox registers */
+#define MBOX0		0x70	/* mailbox 0 */
+#define MBOX1		0x72	/* mailbox 1 */
+#define MBOX2		0x74	/* mailbox 2 */
+#define MBOX3		0x76	/* mailbox 3 */
+#define MBOX4		0x78	/* mailbox 4 */
+#define MBOX5		0x7a	/* mailbox 5 */
+
+/* mailbox command complete status codes */
+#define MBOX_COMMAND_COMPLETE		0x4000
+#define INVALID_COMMAND			0x4001
+#define HOST_INTERFACE_ERROR		0x4002
+#define TEST_FAILED			0x4003
+#define COMMAND_ERROR			0x4005
+#define COMMAND_PARAM_ERROR		0x4006
+
+/* async event status codes */
+#define ASYNC_SCSI_BUS_RESET		0x8001
+#define SYSTEM_ERROR			0x8002
+#define REQUEST_TRANSFER_ERROR		0x8003
+#define RESPONSE_TRANSFER_ERROR		0x8004
+#define REQUEST_QUEUE_WAKEUP		0x8005
+#define EXECUTION_TIMEOUT_RESET		0x8006
+
+struct Entry_header {
+	u_char	entry_type;
+	u_char	entry_cnt;
+	u_char	sys_def_1;
+	u_char	flags;
+};
+
+/* entry header type commands */
+#define ENTRY_COMMAND		1
+#define ENTRY_CONTINUATION	2
+#define ENTRY_STATUS		3
+#define ENTRY_MARKER		4
+#define ENTRY_EXTENDED_COMMAND	5
+
+/* entry header flag definitions */
+#define EFLAG_CONTINUATION	1
+#define EFLAG_BUSY		2
+#define EFLAG_BAD_HEADER	4
+#define EFLAG_BAD_PAYLOAD	8
+
+struct dataseg {
+	u_int			d_base;
+	u_int			d_count;
+};
+
+struct Command_Entry {
+	struct Entry_header	hdr;
+	u_int			handle;
+	u_char			target_lun;
+	u_char			target_id;
+	u_short			cdb_length;
+	u_short			control_flags;
+	u_short			rsvd;
+	u_short			time_out;
+	u_short			segment_cnt;
+	u_char			cdb[12];
+	struct dataseg		dataseg[4];
+};
+
+/* command entry control flag definitions */
+#define CFLAG_NODISC		0x01
+#define CFLAG_HEAD_TAG		0x02
+#define CFLAG_ORDERED_TAG	0x04
+#define CFLAG_SIMPLE_TAG	0x08
+#define CFLAG_TAR_RTN		0x10
+#define CFLAG_READ		0x20
+#define CFLAG_WRITE		0x40
+
+struct Ext_Command_Entry {
+	struct Entry_header	hdr;
+	u_int			handle;
+	u_char			target_lun;
+	u_char			target_id;
+	u_short			cdb_length;
+	u_short			control_flags;
+	u_short			rsvd;
+	u_short			time_out;
+	u_short			segment_cnt;
+	u_char			cdb[44];
+};
+
+struct Continuation_Entry {
+	struct Entry_header	hdr;
+	u_int			reserved;
+	struct dataseg		dataseg[7];
+};
+
+struct Marker_Entry {
+	struct Entry_header	hdr;
+	u_int			reserved;
+	u_char			target_lun;
+	u_char			target_id;
+	u_char			modifier;
+	u_char			rsvd;
+	u_char			rsvds[52];
+};
+
+/* marker entry modifier definitions */
+#define SYNC_DEVICE	0
+#define SYNC_TARGET	1
+#define SYNC_ALL	2
+
+struct Status_Entry {
+	struct Entry_header	hdr;
+	u_int			handle;
+	u_short			scsi_status;
+	u_short			completion_status;
+	u_short			state_flags;
+	u_short			status_flags;
+	u_short			time;
+	u_short			req_sense_len;
+	u_int			residual;
+	u_char			rsvd[8];
+	u_char			req_sense_data[32];
+};
+
+/* status entry completion status definitions */
+#define CS_COMPLETE			0x0000
+#define CS_INCOMPLETE			0x0001
+#define CS_DMA_ERROR			0x0002
+#define CS_TRANSPORT_ERROR		0x0003
+#define CS_RESET_OCCURRED		0x0004
+#define CS_ABORTED			0x0005
+#define CS_TIMEOUT			0x0006
+#define CS_DATA_OVERRUN			0x0007
+#define CS_COMMAND_OVERRUN		0x0008
+#define CS_STATUS_OVERRUN		0x0009
+#define CS_BAD_MESSAGE			0x000a
+#define CS_NO_MESSAGE_OUT		0x000b
+#define CS_EXT_ID_FAILED		0x000c
+#define CS_IDE_MSG_FAILED		0x000d
+#define CS_ABORT_MSG_FAILED		0x000e
+#define CS_REJECT_MSG_FAILED		0x000f
+#define CS_NOP_MSG_FAILED		0x0010
+#define CS_PARITY_ERROR_MSG_FAILED	0x0011
+#define CS_DEVICE_RESET_MSG_FAILED	0x0012
+#define CS_ID_MSG_FAILED		0x0013
+#define CS_UNEXP_BUS_FREE		0x0014
+#define CS_DATA_UNDERRUN		0x0015
+
+/* status entry state flag definitions */
+#define SF_GOT_BUS			0x0100
+#define SF_GOT_TARGET			0x0200
+#define SF_SENT_CDB			0x0400
+#define SF_TRANSFERRED_DATA		0x0800
+#define SF_GOT_STATUS			0x1000
+#define SF_GOT_SENSE			0x2000
+
+/* status entry status flag definitions */
+#define STF_DISCONNECT			0x0001
+#define STF_SYNCHRONOUS			0x0002
+#define STF_PARITY_ERROR		0x0004
+#define STF_BUS_RESET			0x0008
+#define STF_DEVICE_RESET		0x0010
+#define STF_ABORTED			0x0020
+#define STF_TIMEOUT			0x0040
+#define STF_NEGOTIATION			0x0080
+
+/* interface control commands */
+#define ISP_RESET			0x0001
+#define ISP_EN_INT			0x0002
+#define ISP_EN_RISC			0x0004
+
+/* host control commands */
+#define HCCR_NOP			0x0000
+#define HCCR_RESET			0x1000
+#define HCCR_PAUSE			0x2000
+#define HCCR_RELEASE			0x3000
+#define HCCR_SINGLE_STEP		0x4000
+#define HCCR_SET_HOST_INTR		0x5000
+#define HCCR_CLEAR_HOST_INTR		0x6000
+#define HCCR_CLEAR_RISC_INTR		0x7000
+#define HCCR_BP_ENABLE			0x8000
+#define HCCR_BIOS_DISABLE		0x9000
+#define HCCR_TEST_MODE			0xf000
+
+#define RISC_BUSY			0x0004
+
+/* mailbox commands */
+#define MBOX_NO_OP			0x0000
+#define MBOX_LOAD_RAM			0x0001
+#define MBOX_EXEC_FIRMWARE		0x0002
+#define MBOX_DUMP_RAM			0x0003
+#define MBOX_WRITE_RAM_WORD		0x0004
+#define MBOX_READ_RAM_WORD		0x0005
+#define MBOX_MAILBOX_REG_TEST		0x0006
+#define MBOX_VERIFY_CHECKSUM		0x0007
+#define MBOX_ABOUT_FIRMWARE		0x0008
+#define MBOX_CHECK_FIRMWARE		0x000e
+#define MBOX_INIT_REQ_QUEUE		0x0010
+#define MBOX_INIT_RES_QUEUE		0x0011
+#define MBOX_EXECUTE_IOCB		0x0012
+#define MBOX_WAKE_UP			0x0013
+#define MBOX_STOP_FIRMWARE		0x0014
+#define MBOX_ABORT			0x0015
+#define MBOX_ABORT_DEVICE		0x0016
+#define MBOX_ABORT_TARGET		0x0017
+#define MBOX_BUS_RESET			0x0018
+#define MBOX_STOP_QUEUE			0x0019
+#define MBOX_START_QUEUE		0x001a
+#define MBOX_SINGLE_STEP_QUEUE		0x001b
+#define MBOX_ABORT_QUEUE		0x001c
+#define MBOX_GET_DEV_QUEUE_STATUS	0x001d
+#define MBOX_GET_FIRMWARE_STATUS	0x001f
+#define MBOX_GET_INIT_SCSI_ID		0x0020
+#define MBOX_GET_SELECT_TIMEOUT		0x0021
+#define MBOX_GET_RETRY_COUNT		0x0022
+#define MBOX_GET_TAG_AGE_LIMIT		0x0023
+#define MBOX_GET_CLOCK_RATE		0x0024
+#define MBOX_GET_ACT_NEG_STATE		0x0025
+#define MBOX_GET_ASYNC_DATA_SETUP_TIME	0x0026
+#define MBOX_GET_PCI_PARAMS		0x0027
+#define MBOX_GET_TARGET_PARAMS		0x0028
+#define MBOX_GET_DEV_QUEUE_PARAMS	0x0029
+#define MBOX_SET_INIT_SCSI_ID		0x0030
+#define MBOX_SET_SELECT_TIMEOUT		0x0031
+#define MBOX_SET_RETRY_COUNT		0x0032
+#define MBOX_SET_TAG_AGE_LIMIT		0x0033
+#define MBOX_SET_CLOCK_RATE		0x0034
+#define MBOX_SET_ACTIVE_NEG_STATE	0x0035
+#define MBOX_SET_ASYNC_DATA_SETUP_TIME	0x0036
+#define MBOX_SET_PCI_CONTROL_PARAMS	0x0037
+#define MBOX_SET_TARGET_PARAMS		0x0038
+#define MBOX_SET_DEV_QUEUE_PARAMS	0x0039
+#define MBOX_RETURN_BIOS_BLOCK_ADDR	0x0040
+#define MBOX_WRITE_FOUR_RAM_WORDS	0x0041
+#define MBOX_EXEC_BIOS_IOCB		0x0042
+
+#include "qlogicisp_asm.c"
+
+#define PACKB(a, b)			(((a)<<4)|(b))
+
+const u_char mbox_param[] = {
+	PACKB(1, 1),	/* MBOX_NO_OP */
+	PACKB(5, 5),	/* MBOX_LOAD_RAM */
+	PACKB(2, 0),	/* MBOX_EXEC_FIRMWARE */
+	PACKB(5, 5),	/* MBOX_DUMP_RAM */
+	PACKB(3, 3),	/* MBOX_WRITE_RAM_WORD */
+	PACKB(2, 3),	/* MBOX_READ_RAM_WORD */
+	PACKB(6, 6),	/* MBOX_MAILBOX_REG_TEST */
+	PACKB(2, 3),	/* MBOX_VERIFY_CHECKSUM	*/
+	PACKB(1, 3),	/* MBOX_ABOUT_FIRMWARE */
+	PACKB(0, 0),	/* 0x0009 */
+	PACKB(0, 0),	/* 0x000a */
+	PACKB(0, 0),	/* 0x000b */
+	PACKB(0, 0),	/* 0x000c */
+	PACKB(0, 0),	/* 0x000d */
+	PACKB(1, 2),	/* MBOX_CHECK_FIRMWARE */
+	PACKB(0, 0),	/* 0x000f */
+	PACKB(5, 5),	/* MBOX_INIT_REQ_QUEUE */
+	PACKB(6, 6),	/* MBOX_INIT_RES_QUEUE */
+	PACKB(4, 4),	/* MBOX_EXECUTE_IOCB */
+	PACKB(2, 2),	/* MBOX_WAKE_UP	*/
+	PACKB(1, 6),	/* MBOX_STOP_FIRMWARE */
+	PACKB(4, 4),	/* MBOX_ABORT */
+	PACKB(2, 2),	/* MBOX_ABORT_DEVICE */
+	PACKB(3, 3),	/* MBOX_ABORT_TARGET */
+	PACKB(2, 2),	/* MBOX_BUS_RESET */
+	PACKB(2, 3),	/* MBOX_STOP_QUEUE */
+	PACKB(2, 3),	/* MBOX_START_QUEUE */
+	PACKB(2, 3),	/* MBOX_SINGLE_STEP_QUEUE */
+	PACKB(2, 3),	/* MBOX_ABORT_QUEUE */
+	PACKB(2, 4),	/* MBOX_GET_DEV_QUEUE_STATUS */
+	PACKB(0, 0),	/* 0x001e */
+	PACKB(1, 3),	/* MBOX_GET_FIRMWARE_STATUS */
+	PACKB(1, 2),	/* MBOX_GET_INIT_SCSI_ID */
+	PACKB(1, 2),	/* MBOX_GET_SELECT_TIMEOUT */
+	PACKB(1, 3),	/* MBOX_GET_RETRY_COUNT	*/
+	PACKB(1, 2),	/* MBOX_GET_TAG_AGE_LIMIT */
+	PACKB(1, 2),	/* MBOX_GET_CLOCK_RATE */
+	PACKB(1, 2),	/* MBOX_GET_ACT_NEG_STATE */
+	PACKB(1, 2),	/* MBOX_GET_ASYNC_DATA_SETUP_TIME */
+	PACKB(1, 3),	/* MBOX_GET_PCI_PARAMS */
+	PACKB(2, 4),	/* MBOX_GET_TARGET_PARAMS */
+	PACKB(2, 4),	/* MBOX_GET_DEV_QUEUE_PARAMS */
+	PACKB(0, 0),	/* 0x002a */
+	PACKB(0, 0),	/* 0x002b */
+	PACKB(0, 0),	/* 0x002c */
+	PACKB(0, 0),	/* 0x002d */
+	PACKB(0, 0),	/* 0x002e */
+	PACKB(0, 0),	/* 0x002f */
+	PACKB(2, 2),	/* MBOX_SET_INIT_SCSI_ID */
+	PACKB(2, 2),	/* MBOX_SET_SELECT_TIMEOUT */
+	PACKB(3, 3),	/* MBOX_SET_RETRY_COUNT	*/
+	PACKB(2, 2),	/* MBOX_SET_TAG_AGE_LIMIT */
+	PACKB(2, 2),	/* MBOX_SET_CLOCK_RATE */
+	PACKB(2, 2),	/* MBOX_SET_ACTIVE_NEG_STATE */
+	PACKB(2, 2),	/* MBOX_SET_ASYNC_DATA_SETUP_TIME */
+	PACKB(3, 3),	/* MBOX_SET_PCI_CONTROL_PARAMS */
+	PACKB(4, 4),	/* MBOX_SET_TARGET_PARAMS */
+	PACKB(4, 4),	/* MBOX_SET_DEV_QUEUE_PARAMS */
+	PACKB(0, 0),	/* 0x003a */
+	PACKB(0, 0),	/* 0x003b */
+	PACKB(0, 0),	/* 0x003c */
+	PACKB(0, 0),	/* 0x003d */
+	PACKB(0, 0),	/* 0x003e */
+	PACKB(0, 0),	/* 0x003f */
+	PACKB(1, 2),	/* MBOX_RETURN_BIOS_BLOCK_ADDR */
+	PACKB(6, 1),	/* MBOX_WRITE_FOUR_RAM_WORDS */
+	PACKB(2, 3)	/* MBOX_EXEC_BIOS_IOCB */
+};
+
+#define MAX_MBOX_COMMAND	(sizeof(mbox_param)/sizeof(u_short))
+
+struct host_param {
+	u_short		fifo_threshold;
+	u_short		host_adapter_enable;
+	u_short		initiator_scsi_id;
+	u_short		bus_reset_delay;
+	u_short		retry_count;
+	u_short		retry_delay;
+	u_short		async_data_setup_time;
+	u_short		req_ack_active_negation;
+	u_short		data_line_active_negation;
+	u_short		data_dma_burst_enable;
+	u_short		command_dma_burst_enable;
+	u_short		tag_aging;
+	u_short		selection_timeout;
+	u_short		max_queue_depth;
+};
+
+/*
+ * Device Flags:
+ *
+ * Bit  Name
+ * ---------
+ *  7   Disconnect Privilege
+ *  6   Parity Checking
+ *  5   Wide Data Transfers
+ *  4   Synchronous Data Transfers
+ *  3   Tagged Queuing
+ *  2   Automatic Request Sense
+ *  1   Stop Queue on Check Condition
+ *  0   Renegotiate on Error
+ */
+
+struct dev_param {
+	u_short		device_flags;
+	u_short		execution_throttle;
+	u_short		synchronous_period;
+	u_short		synchronous_offset;
+	u_short		device_enable;
+	u_short		reserved; /* pad */
+};
+
+/*
+ * The result queue can be quite a bit smaller since continuation entries
+ * do not show up there:
+ */
+#define RES_QUEUE_LEN		((QLOGICISP_REQ_QUEUE_LEN + 1) / 8 - 1)
+#define QUEUE_ENTRY_LEN		64
+
+struct isp1020_hostdata {
+	u_char	bus;
+	u_char	revision;
+	u_char	device_fn;
+	struct	host_param host_param;
+	struct	dev_param dev_param[MAX_TARGETS];
+	
+	/* result and request queues (shared with isp1020): */
+	u_int	req_in_ptr;		/* index of next request slot */
+	u_int	res_out_ptr;		/* index of next result slot */
+
+	/* this is here so the queues are nicely aligned */
+	long	send_marker;		/* do we need to send a marker? */
+
+	char	res[RES_QUEUE_LEN+1][QUEUE_ENTRY_LEN];
+	char	req[QLOGICISP_REQ_QUEUE_LEN+1][QUEUE_ENTRY_LEN];
+};
+
+/* queue length's _must_ be power of two: */
+#define QUEUE_DEPTH(in, out, ql)	((in - out) & (ql))
+#define REQ_QUEUE_DEPTH(in, out)	QUEUE_DEPTH(in, out, 		     \
+						    QLOGICISP_REQ_QUEUE_LEN)
+#define RES_QUEUE_DEPTH(in, out)	QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
+
+struct Scsi_Host *irq2host[NR_IRQS];
+
+static void	isp1020_enable_irqs(struct Scsi_Host *);
+static void	isp1020_disable_irqs(struct Scsi_Host *);
+static int	isp1020_init(struct Scsi_Host *);
+static int	isp1020_reset_hardware(struct Scsi_Host *);
+static int	isp1020_set_defaults(struct Scsi_Host *);
+static int	isp1020_load_parameters(struct Scsi_Host *);
+static int	isp1020_mbox_command(struct Scsi_Host *, u_short []); 
+static int	isp1020_return_status(struct Status_Entry *);
+static void	isp1020_intr_handler(int, void *, struct pt_regs *);
+
+#if USE_NVRAM_DEFAULTS
+static int	isp1020_get_defaults(struct Scsi_Host *);
+static int	isp1020_verify_nvram(struct Scsi_Host *);
+static u_short	isp1020_read_nvram_word(struct Scsi_Host *, u_short);
+#endif
+
+#if DEBUG_ISP1020
+static void	isp1020_print_scsi_cmd(Scsi_Cmnd *);
+#endif
+#if DEBUG_ISP1020_INTR
+static void	isp1020_print_status_entry(struct Status_Entry *);
+#endif
+
+static struct proc_dir_entry proc_scsi_isp1020 = {
+	PROC_SCSI_QLOGICISP, 7, "isp1020",
+	S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+
+static inline void isp1020_enable_irqs(struct Scsi_Host *host)
+{
+	outw(ISP_EN_INT|ISP_EN_RISC, host->io_port + PCI_INTF_CTL);
+}
+
+
+static inline void isp1020_disable_irqs(struct Scsi_Host *host)
+{
+	outw(0x0, host->io_port + PCI_INTF_CTL);
+}
+
+
+int isp1020_detect(Scsi_Host_Template *tmpt)
+{
+	int hosts = 0;
+	u_short index;
+	u_char bus, device_fn;
+	struct Scsi_Host *host;
+	struct isp1020_hostdata *hostdata;
+
+	ENTER("isp1020_detect");
+
+	tmpt->proc_dir = &proc_scsi_isp1020;
+
+	if (pcibios_present() == 0) {
+		printk("qlogicisp : PCI bios not present\n");
+		return 0;
+	}
+
+	memset(irq2host, 0, sizeof(irq2host));
+
+	for (index = 0; pcibios_find_device(PCI_VENDOR_ID_QLOGIC,
+					    PCI_DEVICE_ID_QLOGIC_ISP1020,
+					    index, &bus, &device_fn) == 0;
+	     index++)
+	{
+		host = scsi_register(tmpt, sizeof(struct isp1020_hostdata));
+		hostdata = (struct isp1020_hostdata *) host->hostdata;
+
+		memset(hostdata, 0, sizeof(struct isp1020_hostdata));
+		hostdata->bus = bus;
+		hostdata->device_fn = device_fn;
+
+		if (isp1020_init(host) || isp1020_reset_hardware(host)
+#if USE_NVRAM_DEFAULTS
+		    || isp1020_get_defaults(host)
+#else
+		    || isp1020_set_defaults(host)
+#endif /* USE_NVRAM_DEFAULTS */
+		    || isp1020_load_parameters(host)) {
+			scsi_unregister(host);
+			continue;
+		}
+
+		host->this_id = hostdata->host_param.initiator_scsi_id;
+
+		if (request_irq(host->irq, isp1020_intr_handler, SA_INTERRUPT,
+				"qlogicisp", NULL))
+		{
+			printk("qlogicisp : interrupt %d already in use\n",
+			       host->irq);
+			scsi_unregister(host);
+			continue;
+		}
+
+		if (check_region(host->io_port, 0xff)) {
+			printk("qlogicisp : i/o region 0x%04x-0x%04x already "
+			       "in use\n",
+			       host->io_port, host->io_port + 0xff);
+			free_irq(host->irq, NULL);
+			scsi_unregister(host);
+			continue;
+		}
+
+		request_region(host->io_port, 0xff, "qlogicisp");
+		irq2host[host->irq] = host;
+
+		outw(0x0, host->io_port + PCI_SEMAPHORE);
+		outw(HCCR_CLEAR_RISC_INTR, host->io_port + HOST_HCCR);
+		isp1020_enable_irqs(host);
+
+		hosts++;
+	}
+
+	LEAVE("isp1020_detect");
+
+	return hosts;
+}
+
+
+int isp1020_release(struct Scsi_Host *host)
+{
+	struct isp1020_hostdata *hostdata;
+
+	ENTER("isp1020_release");
+
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+
+	outw(0x0, host->io_port + PCI_INTF_CTL);
+	free_irq(host->irq, NULL);
+
+	release_region(host->io_port, 0xff);
+
+	LEAVE("isp1020_release");
+
+	return 0;
+}
+
+
+const char *isp1020_info(struct Scsi_Host *host)
+{
+	static char buf[80];
+	struct isp1020_hostdata *hostdata;
+
+	ENTER("isp1020_info");
+
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+	sprintf(buf,
+		"QLogic ISP1020 SCSI on PCI bus %d device %d irq %d base 0x%x",
+		hostdata->bus, (hostdata->device_fn & 0xf8) >> 3, host->irq,
+		host->io_port);
+
+	LEAVE("isp1020_info");
+
+	return buf;
+}
+
+
+/*
+ * The middle SCSI layer ensures that queuecommand never gets invoked
+ * concurrently with itself or the interrupt handler (though the
+ * interrupt handler may call this routine as part of
+ * request-completion handling).
+ */
+int isp1020_queuecommand(Scsi_Cmnd *Cmnd, void (*done)(Scsi_Cmnd *))
+{
+	int i, sg_count, n, num_free;
+	u_int in_ptr, out_ptr;
+	struct dataseg * ds;
+	struct scatterlist *sg;
+	struct Command_Entry *cmd;
+	struct Continuation_Entry *cont;
+	struct Scsi_Host *host;
+	struct isp1020_hostdata *hostdata;
+
+	ENTER("isp1020_queuecommand");
+
+	host = Cmnd->host;
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+	Cmnd->scsi_done = done;
+
+	DEBUG(isp1020_print_scsi_cmd(Cmnd));
+
+	out_ptr = inw(host->io_port + MBOX4);
+	in_ptr  = hostdata->req_in_ptr;
+
+	DEBUG(printk("qlogicisp : request queue depth %d\n",
+		     REQ_QUEUE_DEPTH(in_ptr, out_ptr)));
+
+	cmd = (struct Command_Entry *) &hostdata->req[in_ptr][0];
+	in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
+	if (in_ptr == out_ptr) {
+		printk("qlogicisp : request queue overflow\n");
+		return 1;
+	}
+
+	if (hostdata->send_marker) {
+		struct Marker_Entry *marker;
+
+		TRACE("queue marker", in_ptr, 0);
+
+		DEBUG(printk("qlogicisp : adding marker entry\n"));
+		marker = (struct Marker_Entry *) cmd;
+		memset(marker, 0, sizeof(struct Marker_Entry));
+
+		marker->hdr.entry_type = ENTRY_MARKER;
+		marker->hdr.entry_cnt = 1;
+		marker->modifier = SYNC_ALL;
+
+		hostdata->send_marker = 0;
+
+		if (((in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN) == out_ptr) {
+			outw(in_ptr, host->io_port + MBOX4);
+			hostdata->req_in_ptr = in_ptr;
+			printk("qlogicisp : request queue overflow\n");
+			return 1;
+		}
+		cmd = (struct Command_Entry *) &hostdata->req[in_ptr][0];
+		in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
+	}
+
+	TRACE("queue command", in_ptr, Cmnd);
+
+	memset(cmd, 0, sizeof(struct Command_Entry));
+
+	cmd->hdr.entry_type = ENTRY_COMMAND;
+	cmd->hdr.entry_cnt = 1;
+
+	cmd->handle = (u_int) virt_to_bus(Cmnd);
+	cmd->target_lun = Cmnd->lun;
+	cmd->target_id = Cmnd->target;
+	cmd->cdb_length = Cmnd->cmd_len;
+	cmd->control_flags = CFLAG_READ | CFLAG_WRITE;
+	cmd->time_out = 30;
+
+	memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
+
+	if (Cmnd->use_sg) {
+		cmd->segment_cnt = sg_count = Cmnd->use_sg;
+		sg = (struct scatterlist *) Cmnd->request_buffer;
+		ds = cmd->dataseg;
+
+		/* fill in first four sg entries: */
+		n = sg_count;
+		if (n > 4)
+			n = 4;
+		for (i = 0; i < n; i++) {
+			ds[i].d_base  = (u_int) virt_to_bus(sg->address);
+			ds[i].d_count = sg->length;
+			++sg;
+		}
+		sg_count -= 4;
+
+		while (sg_count > 0) {
+			++cmd->hdr.entry_cnt;
+			cont = (struct Continuation_Entry *)
+				&hostdata->req[in_ptr][0];
+			in_ptr = (in_ptr + 1) & QLOGICISP_REQ_QUEUE_LEN;
+			if (in_ptr == out_ptr) {
+				printk("isp1020: unexpected request queue "
+				       "overflow\n");
+				return 1;
+			}
+			TRACE("queue continuation", in_ptr, 0);
+			cont->hdr.entry_type = ENTRY_CONTINUATION;
+			cont->hdr.entry_cnt  = 0;
+			cont->hdr.sys_def_1  = 0;
+			cont->hdr.flags      = 0;
+			cont->reserved = 0;
+			ds = cont->dataseg;
+			n = sg_count;
+			if (n > 7)
+				n = 7;
+			for (i = 0; i < n; ++i) {
+				ds[i].d_base = (u_int)virt_to_bus(sg->address);
+				ds[i].d_count = sg->length;
+				++sg;
+			}
+			sg_count -= n;
+		}
+	} else {
+		cmd->dataseg[0].d_base =
+			(u_int) virt_to_bus(Cmnd->request_buffer);
+		cmd->dataseg[0].d_count =
+			(u_int) Cmnd->request_bufflen;
+		cmd->segment_cnt = 1;
+	}
+
+	outw(in_ptr, host->io_port + MBOX4);
+	hostdata->req_in_ptr = in_ptr;
+
+	num_free = QLOGICISP_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr);
+	host->can_queue = host->host_busy + num_free;
+	host->sg_tablesize = QLOGICISP_MAX_SG(num_free);
+
+	LEAVE("isp1020_queuecommand");
+
+	return 0;
+}
+
+
+#define ASYNC_EVENT_INTERRUPT	0x01
+
+void isp1020_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	Scsi_Cmnd *Cmnd;
+	struct Status_Entry *sts;
+	struct Scsi_Host *host;
+	struct isp1020_hostdata *hostdata;
+	u_int in_ptr, out_ptr;
+	u_short status;
+
+	ENTER_INTR("isp1020_intr_handler");
+
+	host = irq2host[irq];
+	if (!host) {
+		printk("qlogicisp : unexpected interrupt on line %d\n", irq);
+		return;
+	}
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+
+	DEBUG_INTR(printk("qlogicisp : interrupt on line %d\n", irq));
+
+	if (!(inw(host->io_port + PCI_INTF_STS) & 0x04)) {
+		/* spurious interrupts can happen legally */
+		DEBUG_INTR(printk("qlogicisp: got spurious interrupt\n"));
+		return;
+	}
+	in_ptr = inw(host->io_port + MBOX5);
+	outw(HCCR_CLEAR_RISC_INTR, host->io_port + HOST_HCCR);
+
+	if ((inw(host->io_port + PCI_SEMAPHORE) & ASYNC_EVENT_INTERRUPT)) {
+		status = inw(host->io_port + MBOX0);
+
+		DEBUG_INTR(printk("qlogicisp : mbox completion status: %x\n",
+				  status));
+
+		switch (status) {
+		      case ASYNC_SCSI_BUS_RESET:
+		      case EXECUTION_TIMEOUT_RESET:
+			hostdata->send_marker = 1;
+			break;
+		      case INVALID_COMMAND:
+		      case HOST_INTERFACE_ERROR:
+		      case COMMAND_ERROR:
+		      case COMMAND_PARAM_ERROR:
+			printk("qlogicisp : bad mailbox return status\n");
+			break;
+		}
+		outw(0x0, host->io_port + PCI_SEMAPHORE);
+	}
+	out_ptr = hostdata->res_out_ptr;
+
+	DEBUG_INTR(printk("qlogicisp : response queue update\n"));
+	DEBUG_INTR(printk("qlogicisp : response queue depth %d\n",
+			  QUEUE_DEPTH(in_ptr, out_ptr)));
+
+	while (out_ptr != in_ptr) {
+		sts = (struct Status_Entry *) &hostdata->res[out_ptr][0];
+		out_ptr = (out_ptr + 1) & RES_QUEUE_LEN;
+
+		Cmnd = (Scsi_Cmnd *) bus_to_virt(sts->handle);
+
+		TRACE("done", out_ptr, Cmnd);
+
+		if (sts->completion_status == CS_RESET_OCCURRED
+		    || sts->completion_status == CS_ABORTED
+		    || (sts->status_flags & STF_BUS_RESET))
+			hostdata->send_marker = 1;
+
+		if (sts->state_flags & SF_GOT_SENSE)
+			memcpy(Cmnd->sense_buffer, sts->req_sense_data,
+			       sizeof(Cmnd->sense_buffer));
+
+		DEBUG_INTR(isp1020_print_status_entry(sts));
+
+		if (sts->hdr.entry_type == ENTRY_STATUS)
+			Cmnd->result = isp1020_return_status(sts);
+		else
+			Cmnd->result = DID_ERROR << 16;
+
+		outw(out_ptr, host->io_port + MBOX5);
+		(*Cmnd->scsi_done)(Cmnd);
+	}
+	hostdata->res_out_ptr = out_ptr;
+
+	LEAVE_INTR("isp1020_intr_handler");
+}
+
+
+static int isp1020_return_status(struct Status_Entry *sts)
+{
+	int host_status = DID_ERROR;
+#if DEBUG_ISP1020_INTR
+	static char *reason[] = {
+		"DID_OK",
+		"DID_NO_CONNECT",
+		"DID_BUS_BUSY",
+		"DID_TIME_OUT",
+		"DID_BAD_TARGET",
+		"DID_ABORT",
+		"DID_PARITY",
+		"DID_ERROR",
+		"DID_RESET",
+		"DID_BAD_INTR"
+	};
+#endif /* DEBUG_ISP1020_INTR */
+
+	ENTER("isp1020_return_status");
+
+	DEBUG(printk("qlogicisp : completion status = 0x%04x\n",
+		     sts->completion_status));
+
+	switch(sts->completion_status) {
+	      case CS_COMPLETE:
+		host_status = DID_OK;
+		break;
+	      case CS_INCOMPLETE:
+		if (!(sts->state_flags & SF_GOT_BUS))
+			host_status = DID_NO_CONNECT;
+		else if (!(sts->state_flags & SF_GOT_TARGET))
+			host_status = DID_BAD_TARGET;
+		else if (!(sts->state_flags & SF_SENT_CDB))
+			host_status = DID_ERROR;
+		else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
+			host_status = DID_ERROR;
+		else if (!(sts->state_flags & SF_GOT_STATUS))
+			host_status = DID_ERROR;
+		else if (!(sts->state_flags & SF_GOT_SENSE))
+			host_status = DID_ERROR;
+		break;
+	      case CS_DMA_ERROR:
+	      case CS_TRANSPORT_ERROR:
+		host_status = DID_ERROR;
+		break;
+	      case CS_RESET_OCCURRED:
+		host_status = DID_RESET;
+		break;
+	      case CS_ABORTED:
+		host_status = DID_ABORT;
+		break;
+	      case CS_TIMEOUT:
+		host_status = DID_TIME_OUT;
+		break;
+	      case CS_DATA_OVERRUN:
+	      case CS_COMMAND_OVERRUN:
+	      case CS_STATUS_OVERRUN:
+	      case CS_BAD_MESSAGE:
+	      case CS_NO_MESSAGE_OUT:
+	      case CS_EXT_ID_FAILED:
+	      case CS_IDE_MSG_FAILED:
+	      case CS_ABORT_MSG_FAILED:
+	      case CS_NOP_MSG_FAILED:
+	      case CS_PARITY_ERROR_MSG_FAILED:
+	      case CS_DEVICE_RESET_MSG_FAILED:
+	      case CS_ID_MSG_FAILED:
+	      case CS_UNEXP_BUS_FREE:
+		host_status = DID_ERROR;
+		break;
+	      case CS_DATA_UNDERRUN:
+		host_status = DID_OK;
+		break;
+	      default:
+		printk("qlogicisp : unknown completion status 0x%04x\n",
+		       sts->completion_status);
+		host_status = DID_ERROR;
+		break;
+	}
+
+	DEBUG_INTR(printk("qlogicisp : host status (%s) scsi status %x\n",
+			  reason[host_status], sts->scsi_status));
+
+	LEAVE("isp1020_return_status");
+
+	return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
+}
+
+
+int isp1020_abort(Scsi_Cmnd *Cmnd)
+{
+	u_short param[6];
+	struct Scsi_Host *host;
+	struct isp1020_hostdata *hostdata;
+	int return_status = SCSI_ABORT_SUCCESS;
+	u_int cmdaddr = virt_to_bus(Cmnd);
+
+	ENTER("isp1020_abort");
+
+	host = Cmnd->host;
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+
+	isp1020_disable_irqs(host);
+
+	param[0] = MBOX_ABORT;
+	param[1] = (((u_short) Cmnd->target) << 8) | Cmnd->lun;
+	param[2] = cmdaddr >> 16;
+	param[3] = cmdaddr & 0xffff;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		printk("qlogicisp : scsi abort failure: %x\n", param[0]);
+		return_status = SCSI_ABORT_ERROR;
+	}
+
+	isp1020_enable_irqs(host);
+
+	LEAVE("isp1020_abort");
+
+	return return_status;
+}
+
+
+int isp1020_reset(Scsi_Cmnd *Cmnd, unsigned int reset_flags)
+{
+	u_short param[6];
+	struct Scsi_Host *host;
+	struct isp1020_hostdata *hostdata;
+	int return_status = SCSI_RESET_SUCCESS;
+
+	ENTER("isp1020_reset");
+
+	host = Cmnd->host;
+	hostdata = (struct isp1020_hostdata *) host->hostdata;
+
+	param[0] = MBOX_BUS_RESET;
+	param[1] = hostdata->host_param.bus_reset_delay;
+
+	isp1020_disable_irqs(host);
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		printk("qlogicisp : scsi bus reset failure: %x\n", param[0]);
+		return_status = SCSI_RESET_ERROR;
+	}
+
+	isp1020_enable_irqs(host);
+
+	LEAVE("isp1020_reset");
+
+	return return_status;;
+}
+
+
+int isp1020_biosparam(Disk *disk, kdev_t n, int ip[])
+{
+	int size = disk->capacity;
+
+	ENTER("isp1020_biosparam");
+
+	ip[0] = 64;
+	ip[1] = 32;
+	ip[2] = size >> 11;
+	if (ip[2] > 1024) {
+		ip[0] = 255;
+		ip[1] = 63;
+		ip[2] = size / (ip[0] * ip[1]);
+		if (ip[2] > 1023)
+			ip[2] = 1023;
+	}
+
+	LEAVE("isp1020_biosparam");
+
+	return 0;
+}
+
+
+static int isp1020_reset_hardware(struct Scsi_Host *host)
+{
+	u_short param[6];
+	int loop_count;
+
+	ENTER("isp1020_reset_hardware");
+
+	outw(ISP_RESET, host->io_port + PCI_INTF_CTL);
+	outw(HCCR_RESET, host->io_port + HOST_HCCR);
+	outw(HCCR_RELEASE, host->io_port + HOST_HCCR);
+	outw(HCCR_BIOS_DISABLE, host->io_port + HOST_HCCR);
+
+	loop_count = DEFAULT_LOOP_COUNT;
+	while (--loop_count && inw(host->io_port + HOST_HCCR) == RISC_BUSY)
+		barrier();
+	if (!loop_count)
+		printk("qlogicisp: reset_hardware loop timeout\n");
+
+	outw(0, host->io_port + ISP_CFG1);
+
+#if DEBUG_ISP1020
+	printk("qlogicisp : mbox 0 0x%04x \n", inw(host->io_port + MBOX0));
+	printk("qlogicisp : mbox 1 0x%04x \n", inw(host->io_port + MBOX1));
+	printk("qlogicisp : mbox 2 0x%04x \n", inw(host->io_port + MBOX2));
+	printk("qlogicisp : mbox 3 0x%04x \n", inw(host->io_port + MBOX3));
+	printk("qlogicisp : mbox 4 0x%04x \n", inw(host->io_port + MBOX4));
+	printk("qlogicisp : mbox 5 0x%04x \n", inw(host->io_port + MBOX5));
+#endif /* DEBUG_ISP1020 */
+
+	DEBUG(printk("qlogicisp : loading risc ram\n"));
+
+#if RELOAD_FIRMWARE
+	{
+		int i;
+		for (i = 0; i < risc_code_length01; i++) {
+			param[0] = MBOX_WRITE_RAM_WORD;
+			param[1] = risc_code_addr01 + i;
+			param[2] = risc_code01[i];
+
+			isp1020_mbox_command(host, param);
+
+			if (param[0] != MBOX_COMMAND_COMPLETE) {
+				printk("qlogicisp : firmware load failure\n");
+				return 1;
+			}
+		}
+	}
+#endif /* RELOAD_FIRMWARE */
+
+	DEBUG(printk("qlogicisp : verifying checksum\n"));
+
+	param[0] = MBOX_VERIFY_CHECKSUM;
+	param[1] = risc_code_addr01;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		printk("qlogicisp : ram checksum failure\n");
+		return 1;
+	}
+
+	DEBUG(printk("qlogicisp : executing firmware\n"));
+
+	param[0] = MBOX_EXEC_FIRMWARE;
+	param[1] = risc_code_addr01;
+
+	isp1020_mbox_command(host, param);
+
+	param[0] = MBOX_ABOUT_FIRMWARE;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		printk("qlogicisp : about firmware failure\n");
+		return 1;
+	}
+
+	DEBUG(printk("qlogicisp : firmware major revision %d\n", param[1]));
+	DEBUG(printk("qlogicisp : firmware minor revision %d\n", param[2]));
+
+	LEAVE("isp1020_reset_hardware");
+
+	return 0;
+}
+
+
+static int isp1020_init(struct Scsi_Host *sh)
+{
+	u_int io_base;
+	struct isp1020_hostdata *hostdata;
+	u_char bus, device_fn, revision, irq;
+	u_short vendor_id, device_id, command;
+
+	ENTER("isp1020_init");
+
+	hostdata = (struct isp1020_hostdata *) sh->hostdata;
+	bus = hostdata->bus;
+	device_fn = hostdata->device_fn;
+
+	if (pcibios_read_config_word(bus, device_fn, PCI_VENDOR_ID, &vendor_id)
+            || pcibios_read_config_word(bus, device_fn,
+					PCI_DEVICE_ID, &device_id)
+            || pcibios_read_config_word(bus, device_fn,
+					PCI_COMMAND, &command)
+            || pcibios_read_config_dword(bus, device_fn,
+					 PCI_BASE_ADDRESS_0, &io_base)
+	    || pcibios_read_config_byte(bus, device_fn,
+					PCI_CLASS_REVISION, &revision)
+            || pcibios_read_config_byte(bus, device_fn,
+					PCI_INTERRUPT_LINE, &irq))
+	{
+		printk("qlogicisp : error reading PCI configuration\n");
+		return 1;
+	}
+
+	if (vendor_id != PCI_VENDOR_ID_QLOGIC) {
+		printk("qlogicisp : 0x%04x is not QLogic vendor ID\n",
+		       vendor_id);
+		return 1;
+	}
+
+	if (device_id != PCI_DEVICE_ID_QLOGIC_ISP1020) {
+		printk("qlogicisp : 0x%04x does not match ISP1020 device id\n",
+		       device_id);
+		return 1;
+	}
+
+	if (command & PCI_COMMAND_IO && (io_base & 3) == 1)
+		io_base &= PCI_BASE_ADDRESS_IO_MASK;
+	else {
+		printk("qlogicisp : i/o mapping is disabled\n");
+		return 1;
+	}
+
+	if (!(command & PCI_COMMAND_MASTER)) {
+		printk("qlogicisp : bus mastering is disabled\n");
+		return 1;
+	}
+
+	if (revision != ISP1020_REV_ID)
+		printk("qlogicisp : new isp1020 revision ID (%d)\n", revision);
+
+	if (inw(io_base + PCI_ID_LOW) != PCI_VENDOR_ID_QLOGIC
+	    || inw(io_base + PCI_ID_HIGH) != PCI_DEVICE_ID_QLOGIC_ISP1020)
+	{
+		printk("qlogicisp : can't decode i/o address space\n");
+		return 1;
+	}
+
+	hostdata->revision = revision;
+
+	sh->irq = irq;
+	sh->io_port = io_base;
+
+	LEAVE("isp1020_init");
+
+	return 0;
+}
+
+
+#if USE_NVRAM_DEFAULTS
+
+static int isp1020_get_defaults(struct Scsi_Host *host)
+{
+	int i;
+	u_short value;
+	struct isp1020_hostdata *hostdata =
+		(struct isp1020_hostdata *) host->hostdata;
+
+	ENTER("isp1020_get_defaults");
+
+	if (!isp1020_verify_nvram(host)) {
+		printk("qlogicisp : nvram checksum failure\n");
+		printk("qlogicisp : attempting to use default parameters\n");
+		return isp1020_set_defaults(host);
+	}
+
+	value = isp1020_read_nvram_word(host, 2);
+	hostdata->host_param.fifo_threshold = (value >> 8) & 0x03;
+	hostdata->host_param.host_adapter_enable = (value >> 11) & 0x01;
+	hostdata->host_param.initiator_scsi_id = (value >> 12) & 0x0f;
+
+	value = isp1020_read_nvram_word(host, 3);
+	hostdata->host_param.bus_reset_delay = value & 0xff;
+	hostdata->host_param.retry_count = value >> 8;
+
+	value = isp1020_read_nvram_word(host, 4);
+	hostdata->host_param.retry_delay = value & 0xff;
+	hostdata->host_param.async_data_setup_time = (value >> 8) & 0x0f;
+	hostdata->host_param.req_ack_active_negation = (value >> 12) & 0x01;
+	hostdata->host_param.data_line_active_negation = (value >> 13) & 0x01;
+	hostdata->host_param.data_dma_burst_enable = (value >> 14) & 0x01;
+	hostdata->host_param.command_dma_burst_enable = (value >> 15);
+
+	value = isp1020_read_nvram_word(host, 5);
+	hostdata->host_param.tag_aging = value & 0xff;
+
+	value = isp1020_read_nvram_word(host, 6);
+	hostdata->host_param.selection_timeout = value & 0xffff;
+
+	value = isp1020_read_nvram_word(host, 7);
+	hostdata->host_param.max_queue_depth = value & 0xffff;
+
+#if DEBUG_ISP1020_SETUP
+	printk("qlogicisp : fifo threshold=%d\n",
+	       hostdata->host_param.fifo_threshold);
+	printk("qlogicisp : initiator scsi id=%d\n",
+	       hostdata->host_param.initiator_scsi_id);
+	printk("qlogicisp : bus reset delay=%d\n",
+	       hostdata->host_param.bus_reset_delay);
+	printk("qlogicisp : retry count=%d\n",
+	       hostdata->host_param.retry_count);
+	printk("qlogicisp : retry delay=%d\n",
+	       hostdata->host_param.retry_delay);
+	printk("qlogicisp : async data setup time=%d\n",
+	       hostdata->host_param.async_data_setup_time);
+	printk("qlogicisp : req/ack active negation=%d\n",
+	       hostdata->host_param.req_ack_active_negation);
+	printk("qlogicisp : data line active negation=%d\n",
+	       hostdata->host_param.data_line_active_negation);
+	printk("qlogicisp : data DMA burst enable=%d\n",
+	       hostdata->host_param.data_dma_burst_enable);
+	printk("qlogicisp : command DMA burst enable=%d\n",
+	       hostdata->host_param.command_dma_burst_enable);
+	printk("qlogicisp : tag age limit=%d\n",
+	       hostdata->host_param.tag_aging);
+	printk("qlogicisp : selection timeout limit=%d\n",
+	       hostdata->host_param.selection_timeout);
+	printk("qlogicisp : max queue depth=%d\n",
+	       hostdata->host_param.max_queue_depth);
+#endif /* DEBUG_ISP1020_SETUP */
+
+	for (i = 0; i < MAX_TARGETS; i++) {
+
+		value = isp1020_read_nvram_word(host, 14 + i * 3);
+		hostdata->dev_param[i].device_flags = value & 0xff;
+		hostdata->dev_param[i].execution_throttle = value >> 8;
+
+		value = isp1020_read_nvram_word(host, 15 + i * 3);
+		hostdata->dev_param[i].synchronous_period = value & 0xff;
+		hostdata->dev_param[i].synchronous_offset = (value >> 8) & 0x0f;
+		hostdata->dev_param[i].device_enable = (value >> 12) & 0x01;
+
+#if DEBUG_ISP1020_SETUP
+		printk("qlogicisp : target 0x%02x\n", i);
+		printk("qlogicisp :     device flags=0x%02x\n",
+		       hostdata->dev_param[i].device_flags);
+		printk("qlogicisp :     execution throttle=%d\n",
+		       hostdata->dev_param[i].execution_throttle);
+		printk("qlogicisp :     synchronous period=%d\n",
+		       hostdata->dev_param[i].synchronous_period);
+		printk("qlogicisp :     synchronous offset=%d\n",
+		       hostdata->dev_param[i].synchronous_offset);
+		printk("qlogicisp :     device enable=%d\n",
+		       hostdata->dev_param[i].device_enable);
+#endif /* DEBUG_ISP1020_SETUP */
+	}
+
+	LEAVE("isp1020_get_defaults");
+
+	return 0;
+}
+
+
+#define ISP1020_NVRAM_LEN	0x40
+#define ISP1020_NVRAM_SIG1	0x5349
+#define ISP1020_NVRAM_SIG2	0x2050
+
+static int isp1020_verify_nvram(struct Scsi_Host *host)
+{
+	int	i;
+	u_short value;
+	u_char checksum = 0;
+
+	for (i = 0; i < ISP1020_NVRAM_LEN; i++) {
+		value = isp1020_read_nvram_word(host, i);
+
+		switch (i) {
+		      case 0:
+			if (value != ISP1020_NVRAM_SIG1) return 0;
+			break;
+		      case 1:
+			if (value != ISP1020_NVRAM_SIG2) return 0;
+			break;
+		      case 2:
+			if ((value & 0xff) != 0x02) return 0;
+			break;
+		}
+		checksum += value & 0xff;
+		checksum += value >> 8;
+	}
+
+	return (checksum == 0);
+}
+
+#define NVRAM_DELAY() udelay(2) /* 2 microsecond delay */
+
+
+u_short isp1020_read_nvram_word(struct Scsi_Host *host, u_short byte)
+{
+	int i;
+	u_short value, output, input;
+
+	byte &= 0x3f; byte |= 0x0180;
+
+	for (i = 8; i >= 0; i--) {
+		output = ((byte >> i) & 0x1) ? 0x4 : 0x0;
+		outw(output | 0x2, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+		outw(output | 0x3, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+		outw(output | 0x2, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+	}
+
+	for (i = 0xf, value = 0; i >= 0; i--) {
+		value <<= 1;
+		outw(0x3, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+		input = inw(host->io_port + PCI_NVRAM); NVRAM_DELAY();
+		outw(0x2, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+		if (input & 0x8) value |= 1;
+	}
+
+	outw(0x0, host->io_port + PCI_NVRAM); NVRAM_DELAY();
+
+	return value;
+}
+
+#endif /* USE_NVRAM_DEFAULTS */
+
+
+static int isp1020_set_defaults(struct Scsi_Host *host)
+{
+	struct isp1020_hostdata *hostdata =
+		(struct isp1020_hostdata *) host->hostdata;
+	int i;
+
+	ENTER("isp1020_set_defaults");
+
+	hostdata->host_param.fifo_threshold = 2;
+	hostdata->host_param.host_adapter_enable = 1;
+	hostdata->host_param.initiator_scsi_id = 7;
+	hostdata->host_param.bus_reset_delay = 3;
+	hostdata->host_param.retry_count = 0;
+	hostdata->host_param.retry_delay = 1;
+	hostdata->host_param.async_data_setup_time = 6;
+	hostdata->host_param.req_ack_active_negation = 1;
+	hostdata->host_param.data_line_active_negation = 1;
+	hostdata->host_param.data_dma_burst_enable = 1;
+	hostdata->host_param.command_dma_burst_enable = 1;
+	hostdata->host_param.tag_aging = 8;
+	hostdata->host_param.selection_timeout = 250;
+	hostdata->host_param.max_queue_depth = 256;
+
+	for (i = 0; i < MAX_TARGETS; i++) {
+		hostdata->dev_param[i].device_flags = 0xfd;
+		hostdata->dev_param[i].execution_throttle = 16;
+		hostdata->dev_param[i].synchronous_period = 25;
+		hostdata->dev_param[i].synchronous_offset = 12;
+		hostdata->dev_param[i].device_enable = 1;
+	}
+
+	LEAVE("isp1020_set_defaults");
+
+	return 0;
+}
+
+
+static int isp1020_load_parameters(struct Scsi_Host *host)
+{
+	int i, k;
+	u_int queue_addr;
+	u_short param[6];
+	u_short isp_cfg1;
+	unsigned long flags;
+	struct isp1020_hostdata *hostdata =
+		(struct isp1020_hostdata *) host->hostdata;
+
+	ENTER("isp1020_load_parameters");
+
+	save_flags(flags);
+	cli();
+
+	outw(hostdata->host_param.fifo_threshold, host->io_port + ISP_CFG1);
+
+	param[0] = MBOX_SET_INIT_SCSI_ID;
+	param[1] = hostdata->host_param.initiator_scsi_id;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set initiator id failure\n");
+		return 1;
+	}
+
+	param[0] = MBOX_SET_RETRY_COUNT;
+	param[1] = hostdata->host_param.retry_count;
+	param[2] = hostdata->host_param.retry_delay;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set retry count failure\n");
+		return 1;
+	}
+
+	param[0] = MBOX_SET_ASYNC_DATA_SETUP_TIME;
+	param[1] = hostdata->host_param.async_data_setup_time;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : async data setup time failure\n");
+		return 1;
+	}
+
+	param[0] = MBOX_SET_ACTIVE_NEG_STATE;
+	param[1] = (hostdata->host_param.req_ack_active_negation << 4)
+		| (hostdata->host_param.data_line_active_negation << 5);
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set active negation state failure\n");
+		return 1;
+	}
+
+	param[0] = MBOX_SET_PCI_CONTROL_PARAMS;
+	param[1] = hostdata->host_param.data_dma_burst_enable << 1;
+	param[2] = hostdata->host_param.command_dma_burst_enable << 1;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set pci control parameter failure\n");
+		return 1;
+	}
+
+	isp_cfg1 = inw(host->io_port + ISP_CFG1);
+
+	if (hostdata->host_param.data_dma_burst_enable 
+            || hostdata->host_param.command_dma_burst_enable)
+		isp_cfg1 |= 0x0004;
+	else
+		isp_cfg1 &= 0xfffb;
+
+	outw(isp_cfg1, host->io_port + ISP_CFG1);
+
+	param[0] = MBOX_SET_TAG_AGE_LIMIT;
+	param[1] = hostdata->host_param.tag_aging;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set tag age limit failure\n");
+		return 1;
+	}
+
+	param[0] = MBOX_SET_SELECT_TIMEOUT;
+	param[1] = hostdata->host_param.selection_timeout;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set selection timeout failure\n");
+		return 1;
+	}
+
+	for (i = 0; i < MAX_TARGETS; i++) {
+
+		if (!hostdata->dev_param[i].device_enable)
+			continue;
+
+		param[0] = MBOX_SET_TARGET_PARAMS;
+		param[1] = i << 8;
+		param[2] = hostdata->dev_param[i].device_flags << 8;
+		param[3] = (hostdata->dev_param[i].synchronous_offset << 8)
+			| hostdata->dev_param[i].synchronous_period;
+
+		isp1020_mbox_command(host, param);
+
+		if (param[0] != MBOX_COMMAND_COMPLETE) {
+			restore_flags(flags);
+			printk("qlogicisp : set target parameter failure\n");
+			return 1;
+		}
+
+		for (k = 0; k < MAX_LUNS; k++) {
+
+			param[0] = MBOX_SET_DEV_QUEUE_PARAMS;
+			param[1] = (i << 8) | k;
+			param[2] = hostdata->host_param.max_queue_depth;
+			param[3] = hostdata->dev_param[i].execution_throttle;
+
+			isp1020_mbox_command(host, param);
+
+			if (param[0] != MBOX_COMMAND_COMPLETE) {
+				restore_flags(flags);
+				printk("qlogicisp : set device queue "
+				       "parameter failure\n");
+				return 1;
+			}
+		}
+	}
+
+	queue_addr = (u_int) virt_to_bus(&hostdata->res[0][0]);
+
+	param[0] = MBOX_INIT_RES_QUEUE;
+	param[1] = RES_QUEUE_LEN + 1;
+	param[2] = (u_short) (queue_addr >> 16);
+	param[3] = (u_short) (queue_addr & 0xffff);
+	param[4] = 0;
+	param[5] = 0;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set response queue failure\n");
+		return 1;
+	}
+
+	queue_addr = (u_int) virt_to_bus(&hostdata->req[0][0]);
+
+	param[0] = MBOX_INIT_REQ_QUEUE;
+	param[1] = QLOGICISP_REQ_QUEUE_LEN + 1;
+	param[2] = (u_short) (queue_addr >> 16);
+	param[3] = (u_short) (queue_addr & 0xffff);
+	param[4] = 0;
+
+	isp1020_mbox_command(host, param);
+
+	if (param[0] != MBOX_COMMAND_COMPLETE) {
+		restore_flags(flags);
+		printk("qlogicisp : set request queue failure\n");
+		return 1;
+	}
+
+	restore_flags(flags);
+
+	LEAVE("isp1020_load_parameters");
+
+	return 0;
+}
+
+
+/*
+ * currently, this is only called during initialization or abort/reset,
+ * at which times interrupts are disabled, so polling is OK, I guess...
+ */
+static int isp1020_mbox_command(struct Scsi_Host *host, u_short param[])
+{
+	int loop_count;
+
+	if (mbox_param[param[0]] == 0)
+		return 1;
+
+	loop_count = DEFAULT_LOOP_COUNT;
+	while (--loop_count && inw(host->io_port + HOST_HCCR) & 0x0080)
+		barrier();
+	if (!loop_count)
+		printk("qlogicisp: mbox_command loop timeout #1\n");
+
+	switch(mbox_param[param[0]] >> 4) {
+	      case 6: outw(param[5], host->io_port + MBOX5);
+	      case 5: outw(param[4], host->io_port + MBOX4);
+	      case 4: outw(param[3], host->io_port + MBOX3);
+	      case 3: outw(param[2], host->io_port + MBOX2);
+	      case 2: outw(param[1], host->io_port + MBOX1);
+	      case 1: outw(param[0], host->io_port + MBOX0);
+	}
+
+	outw(0x0, host->io_port + PCI_SEMAPHORE);
+	outw(HCCR_CLEAR_RISC_INTR, host->io_port + HOST_HCCR);
+	outw(HCCR_SET_HOST_INTR, host->io_port + HOST_HCCR);
+
+	loop_count = DEFAULT_LOOP_COUNT;
+	while (--loop_count && !(inw(host->io_port + PCI_INTF_STS) & 0x04))
+		barrier();
+	if (!loop_count)
+		printk("qlogicisp: mbox_command loop timeout #2\n");
+
+	loop_count = DEFAULT_LOOP_COUNT;
+	while (--loop_count && inw(host->io_port + MBOX0) == 0x04)
+		barrier();
+	if (!loop_count)
+		printk("qlogicisp: mbox_command loop timeout #3\n");
+
+	switch(mbox_param[param[0]] & 0xf) {
+	      case 6: param[5] = inw(host->io_port + MBOX5);
+	      case 5: param[4] = inw(host->io_port + MBOX4);
+	      case 4: param[3] = inw(host->io_port + MBOX3);
+	      case 3: param[2] = inw(host->io_port + MBOX2);
+	      case 2: param[1] = inw(host->io_port + MBOX1);
+	      case 1: param[0] = inw(host->io_port + MBOX0);
+	}
+
+	outw(0x0, host->io_port + PCI_SEMAPHORE);
+	outw(HCCR_CLEAR_RISC_INTR, host->io_port + HOST_HCCR);
+
+	return 0;
+}
+
+
+#if DEBUG_ISP1020_INTR
+
+void isp1020_print_status_entry(struct Status_Entry *status)
+{
+	int i;
+
+	printk("qlogicisp : entry count = 0x%02x, type = 0x%02x, flags = 0x%02x\n",
+	       status->hdr.entry_cnt, status->hdr.entry_type, status->hdr.flags);
+	printk("qlogicisp : scsi status = 0x%04x, completion status = 0x%04x\n",
+	       status->scsi_status, status->completion_status);
+	printk("qlogicisp : state flags = 0x%04x, status flags = 0x%04x\n",
+	       status->state_flags, status->status_flags);
+	printk("qlogicisp : time = 0x%04x, request sense length = 0x%04x\n",
+	       status->time, status->req_sense_len);
+	printk("qlogicisp : residual transfer length = 0x%08x\n", status->residual);
+
+	for (i = 0; i < status->req_sense_len; i++)
+		printk("qlogicisp : sense data = 0x%02x\n", status->req_sense_data[i]);
+}
+
+#endif /* DEBUG_ISP1020_INTR */
+
+
+#if DEBUG_ISP1020
+
+void isp1020_print_scsi_cmd(Scsi_Cmnd *cmd)
+{
+	int i;
+
+	printk("qlogicisp : target = 0x%02x, lun = 0x%02x, cmd_len = 0x%02x\n",
+	       cmd->target, cmd->lun, cmd->cmd_len);
+	printk("qlogicisp : command = ");
+	for (i = 0; i < cmd->cmd_len; i++)
+		printk("0x%02x ", cmd->cmnd[i]);
+	printk("\n");
+}
+
+#endif /* DEBUG_ISP1020 */
+
+
+#ifdef MODULE
+Scsi_Host_Template driver_template = QLOGICISP;
+
+#include "scsi_module.c"
+#endif /* MODULE */