[SCSI] initio: Convert into a real Linux driver and update to modern style

This is a mix of a grand clean up I did and a reworking of the hotplug
support by Christoph. In testing it works as well as the previous code
did (that is -quite badly-) but we can now read it and as it settles in
actually debug the long standing problems it shares with the old driver.

Signed-off-by: Alan Cox <alan@redhat.com>

From Christoph:

removal of the BSD license is also fine with me, but should really
get a mention in the changelog aswell.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 1833 insertions, 1990 deletions

diff --git a/drivers/scsi/initio.c b/drivers/scsi/initio.c
index 7e7635ca78f1..65ca1424954e 100644
--- a/drivers/scsi/initio.c
+++ b/drivers/scsi/initio.c
@@ -3,7 +3,8 @@
  *
  * Copyright (c) 1994-1998 Initio Corporation
  * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
- * All rights reserved.
+ * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
+ * Copyright (c) 2007 Red Hat <alan@redhat.com>
  *
  * 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
@@ -19,38 +20,6 @@
  * along with this program; see the file COPYING.  If not, write to
  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  *
- * --------------------------------------------------------------------------
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions, and the following disclaimer,
- *    without modification, immediately at the beginning of the file.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * Where this Software is combined with software released under the terms of 
- * the GNU General Public License ("GPL") and the terms of the GPL would require the 
- * combined work to also be released under the terms of the GPL, the terms
- * and conditions of this License will apply in addition to those of the
- * GPL with the exception of any terms or conditions of this License that
- * conflict with, or are expressly prohibited by, the GPL.
- *
- * 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.
  *
  *************************************************************************
  *
@@ -70,14 +39,14 @@
  *		- Fix memory allocation problem
  * 03/04/98 hc	- v1.01l
  *		- Fix tape rewind which will hang the system problem
- *		- Set can_queue to tul_num_scb
+ *		- Set can_queue to initio_num_scb
  * 06/25/98 hc	- v1.01m
  *		- Get it work for kernel version >= 2.1.75
- *		- Dynamic assign SCSI bus reset holding time in init_tulip()
+ *		- Dynamic assign SCSI bus reset holding time in initio_init()
  * 07/02/98 hc	- v1.01n
  *		- Support 0002134A
  * 08/07/98 hc  - v1.01o
- *		- Change the tul_abort_srb routine to use scsi_done. <01>
+ *		- Change the initio_abort_srb routine to use scsi_done. <01>
  * 09/07/98 hl  - v1.02
  *              - Change the INI9100U define and proc_dir_entry to
  *                reflect the newer Kernel 2.1.118, but the v1.o1o
@@ -150,23 +119,13 @@
 static unsigned int i91u_debug = DEBUG_DEFAULT;
 #endif
 
-#define TUL_RDWORD(x,y)         (short)(inl((int)((ULONG)((ULONG)x+(UCHAR)y)) ))
-
-typedef struct PCI_ID_Struc {
-	unsigned short vendor_id;
-	unsigned short device_id;
-} PCI_ID;
-
-static int tul_num_ch = 4;	/* Maximum 4 adapters           */
-static int tul_num_scb;
-static int tul_tag_enable = 1;
-static SCB *tul_scb;
+static int initio_tag_enable = 1;
 
 #ifdef DEBUG_i91u
 static int setup_debug = 0;
 #endif
 
-static void i91uSCBPost(BYTE * pHcb, BYTE * pScb);
+static void i91uSCBPost(u8 * pHcb, u8 * pScb);
 
 /* PCI Devices supported by this driver */
 static struct pci_device_id i91u_pci_devices[] = {
@@ -184,74 +143,66 @@ MODULE_DEVICE_TABLE(pci, i91u_pci_devices);
 #define DEBUG_STATE     0
 #define INT_DISC	0
 
-/*--- external functions --*/
-static void tul_se2_wait(void);
-
-/*--- forward refrence ---*/
-static SCB *tul_find_busy_scb(HCS * pCurHcb, WORD tarlun);
-static SCB *tul_find_done_scb(HCS * pCurHcb);
-
-static int tulip_main(HCS * pCurHcb);
-
-static int tul_next_state(HCS * pCurHcb);
-static int tul_state_1(HCS * pCurHcb);
-static int tul_state_2(HCS * pCurHcb);
-static int tul_state_3(HCS * pCurHcb);
-static int tul_state_4(HCS * pCurHcb);
-static int tul_state_5(HCS * pCurHcb);
-static int tul_state_6(HCS * pCurHcb);
-static int tul_state_7(HCS * pCurHcb);
-static int tul_xfer_data_in(HCS * pCurHcb);
-static int tul_xfer_data_out(HCS * pCurHcb);
-static int tul_xpad_in(HCS * pCurHcb);
-static int tul_xpad_out(HCS * pCurHcb);
-static int tul_status_msg(HCS * pCurHcb);
-
-static int tul_msgin(HCS * pCurHcb);
-static int tul_msgin_sync(HCS * pCurHcb);
-static int tul_msgin_accept(HCS * pCurHcb);
-static int tul_msgout_reject(HCS * pCurHcb);
-static int tul_msgin_extend(HCS * pCurHcb);
-
-static int tul_msgout_ide(HCS * pCurHcb);
-static int tul_msgout_abort_targ(HCS * pCurHcb);
-static int tul_msgout_abort_tag(HCS * pCurHcb);
-
-static int tul_bus_device_reset(HCS * pCurHcb);
-static void tul_select_atn(HCS * pCurHcb, SCB * pCurScb);
-static void tul_select_atn3(HCS * pCurHcb, SCB * pCurScb);
-static void tul_select_atn_stop(HCS * pCurHcb, SCB * pCurScb);
-static int int_tul_busfree(HCS * pCurHcb);
-static int int_tul_scsi_rst(HCS * pCurHcb);
-static int int_tul_bad_seq(HCS * pCurHcb);
-static int int_tul_resel(HCS * pCurHcb);
-static int tul_sync_done(HCS * pCurHcb);
-static int wdtr_done(HCS * pCurHcb);
-static int wait_tulip(HCS * pCurHcb);
-static int tul_wait_done_disc(HCS * pCurHcb);
-static int tul_wait_disc(HCS * pCurHcb);
-static void tulip_scsi(HCS * pCurHcb);
-static int tul_post_scsi_rst(HCS * pCurHcb);
-
-static void tul_se2_ew_en(WORD CurBase);
-static void tul_se2_ew_ds(WORD CurBase);
-static int tul_se2_rd_all(WORD CurBase);
-static void tul_se2_update_all(WORD CurBase);	/* setup default pattern */
-static void tul_read_eeprom(WORD CurBase);
-
-				/* ---- INTERNAL VARIABLES ---- */
-static HCS tul_hcs[MAX_SUPPORTED_ADAPTERS];
-static INI_ADPT_STRUCT i91u_adpt[MAX_SUPPORTED_ADAPTERS];
-
-/*NVRAM nvram, *nvramp = &nvram; */
+/*--- forward references ---*/
+static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
+static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
+
+static int tulip_main(struct initio_host * host);
+
+static int initio_next_state(struct initio_host * host);
+static int initio_state_1(struct initio_host * host);
+static int initio_state_2(struct initio_host * host);
+static int initio_state_3(struct initio_host * host);
+static int initio_state_4(struct initio_host * host);
+static int initio_state_5(struct initio_host * host);
+static int initio_state_6(struct initio_host * host);
+static int initio_state_7(struct initio_host * host);
+static int initio_xfer_data_in(struct initio_host * host);
+static int initio_xfer_data_out(struct initio_host * host);
+static int initio_xpad_in(struct initio_host * host);
+static int initio_xpad_out(struct initio_host * host);
+static int initio_status_msg(struct initio_host * host);
+
+static int initio_msgin(struct initio_host * host);
+static int initio_msgin_sync(struct initio_host * host);
+static int initio_msgin_accept(struct initio_host * host);
+static int initio_msgout_reject(struct initio_host * host);
+static int initio_msgin_extend(struct initio_host * host);
+
+static int initio_msgout_ide(struct initio_host * host);
+static int initio_msgout_abort_targ(struct initio_host * host);
+static int initio_msgout_abort_tag(struct initio_host * host);
+
+static int initio_bus_device_reset(struct initio_host * host);
+static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static int int_initio_busfree(struct initio_host * host);
+static int int_initio_scsi_rst(struct initio_host * host);
+static int int_initio_bad_seq(struct initio_host * host);
+static int int_initio_resel(struct initio_host * host);
+static int initio_sync_done(struct initio_host * host);
+static int wdtr_done(struct initio_host * host);
+static int wait_tulip(struct initio_host * host);
+static int initio_wait_done_disc(struct initio_host * host);
+static int initio_wait_disc(struct initio_host * host);
+static void tulip_scsi(struct initio_host * host);
+static int initio_post_scsi_rst(struct initio_host * host);
+
+static void initio_se2_ew_en(unsigned long base);
+static void initio_se2_ew_ds(unsigned long base);
+static int initio_se2_rd_all(unsigned long base);
+static void initio_se2_update_all(unsigned long base);	/* setup default pattern */
+static void initio_read_eeprom(unsigned long base);
+
+/* ---- INTERNAL VARIABLES ---- */
+
 static NVRAM i91unvram;
 static NVRAM *i91unvramp;
 
-
-
-static UCHAR i91udftNvRam[64] =
+static u8 i91udftNvRam[64] =
 {
-/*----------- header -----------*/
+	/*----------- header -----------*/
 	0x25, 0xc9,		/* Signature    */
 	0x40,			/* Size         */
 	0x01,			/* Revision     */
@@ -289,7 +240,7 @@ static UCHAR i91udftNvRam[64] =
 	0, 0};			/*      - CheckSum -            */
 
 
-static UCHAR tul_rate_tbl[8] =	/* fast 20      */
+static u8 initio_rate_tbl[8] =	/* fast 20      */
 {
 				/* nanosecond devide by 4 */
 	12,			/* 50ns,  20M   */
@@ -302,53 +253,17 @@ static UCHAR tul_rate_tbl[8] =	/* fast 20      */
 	62			/* 250ns, 4M    */
 };
 
-static void tul_do_pause(unsigned amount)
-{				/* Pause for amount jiffies */
+static void initio_do_pause(unsigned amount)
+{
+	/* Pause for amount jiffies */
 	unsigned long the_time = jiffies + amount;
 
-	while (time_before_eq(jiffies, the_time));
+	while (time_before_eq(jiffies, the_time))
+		cpu_relax();
 }
 
 /*-- forward reference --*/
 
-/*******************************************************************
-	Use memeory refresh time        ~ 15us * 2
-********************************************************************/
-void tul_se2_wait(void)
-{
-#if 1
-	udelay(30);
-#else
-	UCHAR readByte;
-
-	readByte = TUL_RD(0, 0x61);
-	if ((readByte & 0x10) == 0x10) {
-		for (;;) {
-			readByte = TUL_RD(0, 0x61);
-			if ((readByte & 0x10) == 0x10)
-				break;
-		}
-		for (;;) {
-			readByte = TUL_RD(0, 0x61);
-			if ((readByte & 0x10) != 0x10)
-				break;
-		}
-	} else {
-		for (;;) {
-			readByte = TUL_RD(0, 0x61);
-			if ((readByte & 0x10) == 0x10)
-				break;
-		}
-		for (;;) {
-			readByte = TUL_RD(0, 0x61);
-			if ((readByte & 0x10) != 0x10)
-				break;
-		}
-	}
-#endif
-}
-
-
 /******************************************************************
  Input: instruction for  Serial E2PROM
 
@@ -379,1174 +294,1019 @@ void tul_se2_wait(void)
 
 
 ******************************************************************/
-static void tul_se2_instr(WORD CurBase, UCHAR instr)
+
+/**
+ *	initio_se2_instr	-	bitbang an instruction
+ *	@base: Base of InitIO controller
+ *	@instr: Instruction for serial E2PROM
+ *
+ *	Bitbang an instruction out to the serial E2Prom
+ */
+
+static void initio_se2_instr(unsigned long base, u8 instr)
 {
 	int i;
-	UCHAR b;
+	u8 b;
 
-	TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2DO);	/* cs+start bit */
-	tul_se2_wait();
-	TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK | SE2DO);	/* +CLK */
-	tul_se2_wait();
+	outb(SE2CS | SE2DO, base + TUL_NVRAM);		/* cs+start bit */
+	udelay(30);
+	outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM);	/* +CLK */
+	udelay(30);
 
 	for (i = 0; i < 8; i++) {
 		if (instr & 0x80)
-			b = SE2CS | SE2DO;	/* -CLK+dataBit */
+			b = SE2CS | SE2DO;		/* -CLK+dataBit */
 		else
-			b = SE2CS;	/* -CLK */
-		TUL_WR(CurBase + TUL_NVRAM, b);
-		tul_se2_wait();
-		TUL_WR(CurBase + TUL_NVRAM, b | SE2CLK);	/* +CLK */
-		tul_se2_wait();
+			b = SE2CS;			/* -CLK */
+		outb(b, base + TUL_NVRAM);
+		udelay(30);
+		outb(b | SE2CLK, base + TUL_NVRAM);	/* +CLK */
+		udelay(30);
 		instr <<= 1;
 	}
-	TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* -CLK */
-	tul_se2_wait();
-	return;
+	outb(SE2CS, base + TUL_NVRAM);			/* -CLK */
+	udelay(30);
 }
 
 
-/******************************************************************
- Function name  : tul_se2_ew_en
- Description    : Enable erase/write state of serial EEPROM
-******************************************************************/
-void tul_se2_ew_en(WORD CurBase)
+/**
+ *	initio_se2_ew_en	-	Enable erase/write
+ *	@base: Base address of InitIO controller
+ *
+ *	Enable erase/write state of serial EEPROM
+ */
+void initio_se2_ew_en(unsigned long base)
 {
-	tul_se2_instr(CurBase, 0x30);	/* EWEN */
-	TUL_WR(CurBase + TUL_NVRAM, 0);		/* -CS  */
-	tul_se2_wait();
-	return;
+	initio_se2_instr(base, 0x30);	/* EWEN */
+	outb(0, base + TUL_NVRAM);	/* -CS  */
+	udelay(30);
 }
 
 
-/************************************************************************
- Disable erase/write state of serial EEPROM
-*************************************************************************/
-void tul_se2_ew_ds(WORD CurBase)
+/**
+ *	initio_se2_ew_ds	-	Disable erase/write
+ *	@base: Base address of InitIO controller
+ *
+ *	Disable erase/write state of serial EEPROM
+ */
+void initio_se2_ew_ds(unsigned long base)
 {
-	tul_se2_instr(CurBase, 0);	/* EWDS */
-	TUL_WR(CurBase + TUL_NVRAM, 0);		/* -CS  */
-	tul_se2_wait();
-	return;
+	initio_se2_instr(base, 0);	/* EWDS */
+	outb(0, base + TUL_NVRAM);	/* -CS  */
+	udelay(30);
 }
 
 
-/******************************************************************
-	Input  :address of Serial E2PROM
-	Output :value stored in  Serial E2PROM
-*******************************************************************/
-static USHORT tul_se2_rd(WORD CurBase, ULONG adr)
+/**
+ *	initio_se2_rd		-	read E2PROM word
+ *	@base: Base of InitIO controller
+ *	@addr: Address of word in E2PROM
+ *
+ *	Read a word from the NV E2PROM device
+ */
+static u16 initio_se2_rd(unsigned long base, u8 addr)
 {
-	UCHAR instr, readByte;
-	USHORT readWord;
+	u8 instr, rb;
+	u16 val = 0;
 	int i;
 
-	instr = (UCHAR) (adr | 0x80);
-	tul_se2_instr(CurBase, instr);	/* READ INSTR */
-	readWord = 0;
+	instr = (u8) (addr | 0x80);
+	initio_se2_instr(base, instr);	/* READ INSTR */
 
 	for (i = 15; i >= 0; i--) {
-		TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);	/* +CLK */
-		tul_se2_wait();
-		TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* -CLK */
+		outb(SE2CS | SE2CLK, base + TUL_NVRAM);	/* +CLK */
+		udelay(30);
+		outb(SE2CS, base + TUL_NVRAM);		/* -CLK */
 
 		/* sample data after the following edge of clock  */
-		readByte = TUL_RD(CurBase, TUL_NVRAM);
-		readByte &= SE2DI;
-		readWord += (readByte << i);
-		tul_se2_wait();	/* 6/20/95 */
+		rb = inb(base + TUL_NVRAM);
+		rb &= SE2DI;
+		val += (rb << i);
+		udelay(30);	/* 6/20/95 */
 	}
 
-	TUL_WR(CurBase + TUL_NVRAM, 0);		/* no chip select */
-	tul_se2_wait();
-	return readWord;
+	outb(0, base + TUL_NVRAM);		/* no chip select */
+	udelay(30);
+	return val;
 }
 
-
-/******************************************************************
- Input: new value in  Serial E2PROM, address of Serial E2PROM
-*******************************************************************/
-static void tul_se2_wr(WORD CurBase, UCHAR adr, USHORT writeWord)
+/**
+ *	initio_se2_wr		-	read E2PROM word
+ *	@base: Base of InitIO controller
+ *	@addr: Address of word in E2PROM
+ *	@val: Value to write
+ *
+ *	Write a word to the NV E2PROM device. Used when recovering from
+ *	a problem with the NV.
+ */
+static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
 {
-	UCHAR readByte;
-	UCHAR instr;
+	u8 rb;
+	u8 instr;
 	int i;
 
-	instr = (UCHAR) (adr | 0x40);
-	tul_se2_instr(CurBase, instr);	/* WRITE INSTR */
+	instr = (u8) (addr | 0x40);
+	initio_se2_instr(base, instr);	/* WRITE INSTR */
 	for (i = 15; i >= 0; i--) {
-		if (writeWord & 0x8000)
-			TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2DO);	/* -CLK+dataBit 1 */
+		if (val & 0x8000)
+			outb(SE2CS | SE2DO, base + TUL_NVRAM);	/* -CLK+dataBit 1 */
 		else
-			TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* -CLK+dataBit 0 */
-		tul_se2_wait();
-		TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);	/* +CLK */
-		tul_se2_wait();
-		writeWord <<= 1;
+			outb(SE2CS, base + TUL_NVRAM);		/* -CLK+dataBit 0 */
+		udelay(30);
+		outb(SE2CS | SE2CLK, base + TUL_NVRAM);		/* +CLK */
+		udelay(30);
+		val <<= 1;
 	}
-	TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* -CLK */
-	tul_se2_wait();
-	TUL_WR(CurBase + TUL_NVRAM, 0);		/* -CS  */
-	tul_se2_wait();
+	outb(SE2CS, base + TUL_NVRAM);				/* -CLK */
+	udelay(30);
+	outb(0, base + TUL_NVRAM);				/* -CS  */
+	udelay(30);
 
-	TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* +CS  */
-	tul_se2_wait();
+	outb(SE2CS, base + TUL_NVRAM);				/* +CS  */
+	udelay(30);
 
 	for (;;) {
-		TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);	/* +CLK */
-		tul_se2_wait();
-		TUL_WR(CurBase + TUL_NVRAM, SE2CS);	/* -CLK */
-		tul_se2_wait();
-		if ((readByte = TUL_RD(CurBase, TUL_NVRAM)) & SE2DI)
+		outb(SE2CS | SE2CLK, base + TUL_NVRAM);		/* +CLK */
+		udelay(30);
+		outb(SE2CS, base + TUL_NVRAM);			/* -CLK */
+		udelay(30);
+		if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
 			break;	/* write complete */
 	}
-	TUL_WR(CurBase + TUL_NVRAM, 0);		/* -CS */
-	return;
+	outb(0, base + TUL_NVRAM);				/* -CS */
 }
 
+/**
+ *	initio_se2_rd_all	-	read hostadapter NV configuration
+ *	@base: Base address of InitIO controller
+ *
+ *	Reads the E2PROM data into main memory. Ensures that the checksum
+ *	and header marker are valid. Returns 1 on success -1 on error.
+ */
 
-/***********************************************************************
- Read SCSI H/A configuration parameters from serial EEPROM
-************************************************************************/
-int tul_se2_rd_all(WORD CurBase)
+static int initio_se2_rd_all(unsigned long base)
 {
 	int i;
-	ULONG chksum = 0;
-	USHORT *np;
+	u16 chksum = 0;
+	u16 *np;
 
 	i91unvramp = &i91unvram;
-	np = (USHORT *) i91unvramp;
-	for (i = 0; i < 32; i++) {
-		*np++ = tul_se2_rd(CurBase, i);
-	}
+	np = (u16 *) i91unvramp;
+	for (i = 0; i < 32; i++)
+		*np++ = initio_se2_rd(base, i);
 
-/*--------------------Is signature "ini" ok ? ----------------*/
+	/* Is signature "ini" ok ? */
 	if (i91unvramp->NVM_Signature != INI_SIGNATURE)
 		return -1;
-/*---------------------- Is ckecksum ok ? ----------------------*/
-	np = (USHORT *) i91unvramp;
+	/* Is ckecksum ok ? */
+	np = (u16 *) i91unvramp;
 	for (i = 0; i < 31; i++)
 		chksum += *np++;
-	if (i91unvramp->NVM_CheckSum != (USHORT) chksum)
+	if (i91unvramp->NVM_CheckSum != chksum)
 		return -1;
 	return 1;
 }
 
-
-/***********************************************************************
- Update SCSI H/A configuration parameters from serial EEPROM
-************************************************************************/
-void tul_se2_update_all(WORD CurBase)
+/**
+ *	initio_se2_update_all		-	Update E2PROM
+ *	@base: Base of InitIO controller
+ *
+ *	Update the E2PROM by wrting any changes into the E2PROM
+ *	chip, rewriting the checksum.
+ */
+static void initio_se2_update_all(unsigned long base)
 {				/* setup default pattern */
 	int i;
-	ULONG chksum = 0;
-	USHORT *np, *np1;
+	u16 chksum = 0;
+	u16 *np, *np1;
 
 	i91unvramp = &i91unvram;
 	/* Calculate checksum first */
-	np = (USHORT *) i91udftNvRam;
+	np = (u16 *) i91udftNvRam;
 	for (i = 0; i < 31; i++)
 		chksum += *np++;
-	*np = (USHORT) chksum;
-	tul_se2_ew_en(CurBase);	/* Enable write  */
+	*np = chksum;
+	initio_se2_ew_en(base);	/* Enable write  */
 
-	np = (USHORT *) i91udftNvRam;
-	np1 = (USHORT *) i91unvramp;
+	np = (u16 *) i91udftNvRam;
+	np1 = (u16 *) i91unvramp;
 	for (i = 0; i < 32; i++, np++, np1++) {
-		if (*np != *np1) {
-			tul_se2_wr(CurBase, i, *np);
-		}
+		if (*np != *np1)
+			initio_se2_wr(base, i, *np);
 	}
-
-	tul_se2_ew_ds(CurBase);	/* Disable write   */
-	return;
+	initio_se2_ew_ds(base);	/* Disable write   */
 }
 
-/*************************************************************************
- Function name  : read_eeprom
-**************************************************************************/
-void tul_read_eeprom(WORD CurBase)
-{
-	UCHAR gctrl;
-
-	i91unvramp = &i91unvram;
-/*------Enable EEProm programming ---*/
-	gctrl = TUL_RD(CurBase, TUL_GCTRL);
-	TUL_WR(CurBase + TUL_GCTRL, gctrl | TUL_GCTRL_EEPROM_BIT);
-	if (tul_se2_rd_all(CurBase) != 1) {
-		tul_se2_update_all(CurBase);	/* setup default pattern */
-		tul_se2_rd_all(CurBase);	/* load again  */
-	}
-/*------ Disable EEProm programming ---*/
-	gctrl = TUL_RD(CurBase, TUL_GCTRL);
-	TUL_WR(CurBase + TUL_GCTRL, gctrl & ~TUL_GCTRL_EEPROM_BIT);
-}				/* read_eeprom */
+/**
+ *	initio_read_eeprom		-	Retrieve configuration
+ *	@base: Base of InitIO Host Adapter
+ *
+ *	Retrieve the host adapter configuration data from E2Prom. If the
+ *	data is invalid then the defaults are used and are also restored
+ *	into the E2PROM. This forms the access point for the SCSI driver
+ *	into the E2PROM layer, the other functions for the E2PROM are all
+ *	internal use.
+ *
+ *	Must be called single threaded, uses a shared global area.
+ */
 
-static int Addi91u_into_Adapter_table(WORD wBIOS, WORD wBASE, BYTE bInterrupt,
-				      BYTE bBus, BYTE bDevice)
+static void initio_read_eeprom(unsigned long base)
 {
-	int i, j;
+	u8 gctrl;
 
-	for (i = 0; i < MAX_SUPPORTED_ADAPTERS; i++) {
-		if (i91u_adpt[i].ADPT_BIOS < wBIOS)
-			continue;
-		if (i91u_adpt[i].ADPT_BIOS == wBIOS) {
-			if (i91u_adpt[i].ADPT_BASE == wBASE) {
-				if (i91u_adpt[i].ADPT_Bus != 0xFF)
-					return 1;
-			} else if (i91u_adpt[i].ADPT_BASE < wBASE)
-					continue;
-		}
-		for (j = MAX_SUPPORTED_ADAPTERS - 1; j > i; j--) {
-			i91u_adpt[j].ADPT_BASE = i91u_adpt[j - 1].ADPT_BASE;
-			i91u_adpt[j].ADPT_INTR = i91u_adpt[j - 1].ADPT_INTR;
-			i91u_adpt[j].ADPT_BIOS = i91u_adpt[j - 1].ADPT_BIOS;
-			i91u_adpt[j].ADPT_Bus = i91u_adpt[j - 1].ADPT_Bus;
-			i91u_adpt[j].ADPT_Device = i91u_adpt[j - 1].ADPT_Device;
-		}
-		i91u_adpt[i].ADPT_BASE = wBASE;
-		i91u_adpt[i].ADPT_INTR = bInterrupt;
-		i91u_adpt[i].ADPT_BIOS = wBIOS;
-		i91u_adpt[i].ADPT_Bus = bBus;
-		i91u_adpt[i].ADPT_Device = bDevice;
-		return 0;
+	i91unvramp = &i91unvram;
+	/* Enable EEProm programming */
+	gctrl = inb(base + TUL_GCTRL);
+	outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
+	if (initio_se2_rd_all(base) != 1) {
+		initio_se2_update_all(base);	/* setup default pattern */
+		initio_se2_rd_all(base);	/* load again  */
 	}
-	return 1;
+	/* Disable EEProm programming */
+	gctrl = inb(base + TUL_GCTRL);
+	outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
 }
 
-static void init_i91uAdapter_table(void)
-{
-	int i;
-
-	for (i = 0; i < MAX_SUPPORTED_ADAPTERS; i++) {	/* Initialize adapter structure */
-		i91u_adpt[i].ADPT_BIOS = 0xffff;
-		i91u_adpt[i].ADPT_BASE = 0xffff;
-		i91u_adpt[i].ADPT_INTR = 0xff;
-		i91u_adpt[i].ADPT_Bus = 0xff;
-		i91u_adpt[i].ADPT_Device = 0xff;
-	}
-	return;
-}
+/**
+ *	initio_stop_bm		-	stop bus master
+ *	@host: InitIO we are stopping
+ *
+ *	Stop any pending DMA operation, aborting the DMA if neccessary
+ */
 
-static void tul_stop_bm(HCS * pCurHcb)
+static void initio_stop_bm(struct initio_host * host)
 {
 
-	if (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & XPEND) {	/* if DMA xfer is pending, abort DMA xfer */
-		TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_ABT | TAX_X_CLR_FIFO);
+	if (inb(host->addr + TUL_XStatus) & XPEND) {	/* if DMA xfer is pending, abort DMA xfer */
+		outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
 		/* wait Abort DMA xfer done */
-		while ((TUL_RD(pCurHcb->HCS_Base, TUL_Int) & XABT) == 0);
+		while ((inb(host->addr + TUL_Int) & XABT) == 0)
+			cpu_relax();
 	}
-	TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
+	outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
 }
 
-/***************************************************************************/
-static void get_tulipPCIConfig(HCS * pCurHcb, int ch_idx)
-{
-	pCurHcb->HCS_Base = i91u_adpt[ch_idx].ADPT_BASE;	/* Supply base address  */
-	pCurHcb->HCS_BIOS = i91u_adpt[ch_idx].ADPT_BIOS;	/* Supply BIOS address  */
-	pCurHcb->HCS_Intr = i91u_adpt[ch_idx].ADPT_INTR;	/* Supply interrupt line */
-	return;
-}
+/**
+ *	initio_reset_scsi		-	Reset SCSI host controller
+ *	@host: InitIO host to reset
+ *	@seconds: Recovery time
+ *
+ *	Perform a full reset of the SCSI subsystem.
+ */
 
-/***************************************************************************/
-static int tul_reset_scsi(HCS * pCurHcb, int seconds)
+static int initio_reset_scsi(struct initio_host * host, int seconds)
 {
-	TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_RST_BUS);
+	outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
 
-	while (!((pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt)) & TSS_SCSIRST_INT));
-	/* reset tulip chip */
+	while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
+		cpu_relax();
 
-	TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, 0);
+	/* reset tulip chip */
+	outb(0, host->addr + TUL_SSignal);
 
 	/* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
 	/* SONY 5200 tape drive won't work if only stall for 1 sec */
-	tul_do_pause(seconds * HZ);
-
-	TUL_RD(pCurHcb->HCS_Base, TUL_SInt);
+	/* FIXME: this is a very long busy wait right now */
+	initio_do_pause(seconds * HZ);
 
-	return (SCSI_RESET_SUCCESS);
+	inb(host->addr + TUL_SInt);
+	return SCSI_RESET_SUCCESS;
 }
 
-/***************************************************************************/
-static int init_tulip(HCS * pCurHcb, SCB * scbp, int tul_num_scb,
-		      BYTE * pbBiosAdr, int seconds)
+/**
+ *	initio_init		-	set up an InitIO host adapter
+ *	@host: InitIO host adapter
+ *	@num_scbs: Number of SCBS
+ *	@bios_addr: BIOS address
+ *
+ *	Set up the host adapter and devices according to the configuration
+ *	retrieved from the E2PROM.
+ *
+ *	Locking: Calls E2PROM layer code which is not re-enterable so must
+ *	run single threaded for now.
+ */
+
+static void initio_init(struct initio_host * host, u8 *bios_addr)
 {
 	int i;
-	BYTE *pwFlags;
-	BYTE *pbHeads;
-	SCB *pTmpScb, *pPrevScb = NULL;
-
-	pCurHcb->HCS_NumScbs = tul_num_scb;
-	pCurHcb->HCS_Semaph = 1;
-	spin_lock_init(&pCurHcb->HCS_SemaphLock);
-	pCurHcb->HCS_JSStatus0 = 0;
-	pCurHcb->HCS_Scb = scbp;
-	pCurHcb->HCS_NxtPend = scbp;
-	pCurHcb->HCS_NxtAvail = scbp;
-	for (i = 0, pTmpScb = scbp; i < tul_num_scb; i++, pTmpScb++) {
-		pTmpScb->SCB_TagId = i;
-		if (i != 0)
-			pPrevScb->SCB_NxtScb = pTmpScb;
-		pPrevScb = pTmpScb;
-	}
-	pPrevScb->SCB_NxtScb = NULL;
-	pCurHcb->HCS_ScbEnd = pTmpScb;
-	pCurHcb->HCS_FirstAvail = scbp;
-	pCurHcb->HCS_LastAvail = pPrevScb;
-	spin_lock_init(&pCurHcb->HCS_AvailLock);
-	pCurHcb->HCS_FirstPend = NULL;
-	pCurHcb->HCS_LastPend = NULL;
-	pCurHcb->HCS_FirstBusy = NULL;
-	pCurHcb->HCS_LastBusy = NULL;
-	pCurHcb->HCS_FirstDone = NULL;
-	pCurHcb->HCS_LastDone = NULL;
-	pCurHcb->HCS_ActScb = NULL;
-	pCurHcb->HCS_ActTcs = NULL;
-
-	tul_read_eeprom(pCurHcb->HCS_Base);
-/*---------- get H/A configuration -------------*/
+	u8 *flags;
+	u8 *heads;
+
+	/* Get E2Prom configuration */
+	initio_read_eeprom(host->addr);
 	if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
-		pCurHcb->HCS_MaxTar = 8;
+		host->max_tar = 8;
 	else
-		pCurHcb->HCS_MaxTar = 16;
+		host->max_tar = 16;
 
-	pCurHcb->HCS_Config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
+	host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
 
-	pCurHcb->HCS_SCSI_ID = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
-	pCurHcb->HCS_IdMask = ~(1 << pCurHcb->HCS_SCSI_ID);
+	host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
+	host->idmask = ~(1 << host->scsi_id);
 
 #ifdef CHK_PARITY
 	/* Enable parity error response */
-	TUL_WR(pCurHcb->HCS_Base + TUL_PCMD, TUL_RD(pCurHcb->HCS_Base, TUL_PCMD) | 0x40);
+	outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
 #endif
 
 	/* Mask all the interrupt       */
-	TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
+	outb(0x1F, host->addr + TUL_Mask);
 
-	tul_stop_bm(pCurHcb);
+	initio_stop_bm(host);
 	/* --- Initialize the tulip --- */
-	TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_RST_CHIP);
+	outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
 
 	/* program HBA's SCSI ID        */
-	TUL_WR(pCurHcb->HCS_Base + TUL_SScsiId, pCurHcb->HCS_SCSI_ID << 4);
+	outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
 
 	/* Enable Initiator Mode ,phase latch,alternate sync period mode,
 	   disable SCSI reset */
-	if (pCurHcb->HCS_Config & HCC_EN_PAR)
-		pCurHcb->HCS_SConf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
+	if (host->config & HCC_EN_PAR)
+		host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
 	else
-		pCurHcb->HCS_SConf1 = (TSC_INITDEFAULT);
-	TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurHcb->HCS_SConf1);
+		host->sconf1 = (TSC_INITDEFAULT);
+	outb(host->sconf1, host->addr + TUL_SConfig);
 
-	/* Enable HW reselect           */
-	TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);
+	/* Enable HW reselect */
+	outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
 
-	TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, 0);
+	outb(0, host->addr + TUL_SPeriod);
 
 	/* selection time out = 250 ms */
-	TUL_WR(pCurHcb->HCS_Base + TUL_STimeOut, 153);
+	outb(153, host->addr + TUL_STimeOut);
 
-/*--------- Enable SCSI terminator -----*/
-	TUL_WR(pCurHcb->HCS_Base + TUL_XCtrl, (pCurHcb->HCS_Config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)));
-	TUL_WR(pCurHcb->HCS_Base + TUL_GCTRL1,
-	       ((pCurHcb->HCS_Config & HCC_AUTO_TERM) >> 4) | (TUL_RD(pCurHcb->HCS_Base, TUL_GCTRL1) & 0xFE));
+	/* Enable SCSI terminator */
+	outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
+		host->addr + TUL_XCtrl);
+	outb(((host->config & HCC_AUTO_TERM) >> 4) |
+		(inb(host->addr + TUL_GCTRL1) & 0xFE),
+		host->addr + TUL_GCTRL1);
 
 	for (i = 0,
-	     pwFlags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
-	     pbHeads = pbBiosAdr + 0x180;
-	     i < pCurHcb->HCS_MaxTar;
-	     i++, pwFlags++) {
-		pCurHcb->HCS_Tcs[i].TCS_Flags = *pwFlags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
-		if (pCurHcb->HCS_Tcs[i].TCS_Flags & TCF_EN_255)
-			pCurHcb->HCS_Tcs[i].TCS_DrvFlags = TCF_DRV_255_63;
+	     flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
+	     heads = bios_addr + 0x180;
+	     i < host->max_tar;
+	     i++, flags++) {
+		host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
+		if (host->targets[i].flags & TCF_EN_255)
+			host->targets[i].drv_flags = TCF_DRV_255_63;
 		else
-			pCurHcb->HCS_Tcs[i].TCS_DrvFlags = 0;
-		pCurHcb->HCS_Tcs[i].TCS_JS_Period = 0;
-		pCurHcb->HCS_Tcs[i].TCS_SConfig0 = pCurHcb->HCS_SConf1;
-		pCurHcb->HCS_Tcs[i].TCS_DrvHead = *pbHeads++;
-		if (pCurHcb->HCS_Tcs[i].TCS_DrvHead == 255)
-			pCurHcb->HCS_Tcs[i].TCS_DrvFlags = TCF_DRV_255_63;
+			host->targets[i].drv_flags = 0;
+		host->targets[i].js_period = 0;
+		host->targets[i].sconfig0 = host->sconf1;
+		host->targets[i].heads = *heads++;
+		if (host->targets[i].heads == 255)
+			host->targets[i].drv_flags = TCF_DRV_255_63;
 		else
-			pCurHcb->HCS_Tcs[i].TCS_DrvFlags = 0;
-		pCurHcb->HCS_Tcs[i].TCS_DrvSector = *pbHeads++;
-		pCurHcb->HCS_Tcs[i].TCS_Flags &= ~TCF_BUSY;
-		pCurHcb->HCS_ActTags[i] = 0;
-		pCurHcb->HCS_MaxTags[i] = 0xFF;
+			host->targets[i].drv_flags = 0;
+		host->targets[i].sectors = *heads++;
+		host->targets[i].flags &= ~TCF_BUSY;
+		host->act_tags[i] = 0;
+		host->max_tags[i] = 0xFF;
 	}			/* for                          */
 	printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
-	       pCurHcb->HCS_Base, pCurHcb->HCS_Intr,
-	       pCurHcb->HCS_BIOS, pCurHcb->HCS_SCSI_ID);
-/*------------------- reset SCSI Bus ---------------------------*/
-	if (pCurHcb->HCS_Config & HCC_SCSI_RESET) {
-		printk("i91u: Reset SCSI Bus ... \n");
-		tul_reset_scsi(pCurHcb, seconds);
+	       host->addr, host->irq,
+	       host->bios_addr, host->scsi_id);
+	/* Reset SCSI Bus */
+	if (host->config & HCC_SCSI_RESET) {
+		printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
+		initio_reset_scsi(host, 10);
 	}
-	TUL_WR(pCurHcb->HCS_Base + TUL_SCFG1, 0x17);
-	TUL_WR(pCurHcb->HCS_Base + TUL_SIntEnable, 0xE9);
-	return (0);
+	outb(0x17, host->addr + TUL_SCFG1);
+	outb(0xE9, host->addr + TUL_SIntEnable);
 }
 
-/***************************************************************************/
-static SCB *tul_alloc_scb(HCS * hcsp)
+/**
+ *	initio_alloc_scb		-	Allocate an SCB
+ *	@host: InitIO host we are allocating for
+ *
+ *	Walk the SCB list for the controller and allocate a free SCB if
+ *	one exists.
+ */
+static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
 {
-	SCB *pTmpScb;
-	ULONG flags;
-	spin_lock_irqsave(&(hcsp->HCS_AvailLock), flags);
-	if ((pTmpScb = hcsp->HCS_FirstAvail) != NULL) {
+	struct scsi_ctrl_blk *scb;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->avail_lock, flags);
+	if ((scb = host->first_avail) != NULL) {
 #if DEBUG_QUEUE
-		printk("find scb at %08lx\n", (ULONG) pTmpScb);
+		printk("find scb at %p\n", scb);
 #endif
-		if ((hcsp->HCS_FirstAvail = pTmpScb->SCB_NxtScb) == NULL)
-			hcsp->HCS_LastAvail = NULL;
-		pTmpScb->SCB_NxtScb = NULL;
-		pTmpScb->SCB_Status = SCB_RENT;
+		if ((host->first_avail = scb->next) == NULL)
+			host->last_avail = NULL;
+		scb->next = NULL;
+		scb->status = SCB_RENT;
 	}
-	spin_unlock_irqrestore(&(hcsp->HCS_AvailLock), flags);
-	return (pTmpScb);
+	spin_unlock_irqrestore(&host->avail_lock, flags);
+	return scb;
 }
 
-/***************************************************************************/
-static void tul_release_scb(HCS * hcsp, SCB * scbp)
+/**
+ *	initio_release_scb		-	Release an SCB
+ *	@host: InitIO host that owns the SCB
+ *	@cmnd: SCB command block being returned
+ *
+ *	Return an allocated SCB to the host free list
+ */
+
+static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
 {
-	ULONG flags;
+	unsigned long flags;
 
 #if DEBUG_QUEUE
-	printk("Release SCB %lx; ", (ULONG) scbp);
+	printk("Release SCB %p; ", cmnd);
 #endif
-	spin_lock_irqsave(&(hcsp->HCS_AvailLock), flags);
-	scbp->SCB_Srb = NULL;
-	scbp->SCB_Status = 0;
-	scbp->SCB_NxtScb = NULL;
-	if (hcsp->HCS_LastAvail != NULL) {
-		hcsp->HCS_LastAvail->SCB_NxtScb = scbp;
-		hcsp->HCS_LastAvail = scbp;
+	spin_lock_irqsave(&(host->avai