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Date: Sun, 19 Jan 2003 15:58:01 +0900
From: Osamu Tomita <tomita@cinet.co.jp>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: [PATCHSET] PC-9800 sub-arch (25/29) SCSI
Message-ID: <20030119065801.GX2965@yuzuki.cinet.co.jp>
References: <20030119051043.GA2662@yuzuki.cinet.co.jp>
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This is patchset to support NEC PC-9800 subarchitecture
against 2.5.59 (25/29).

SCSI host adapter support.

diff -Nru linux/drivers/scsi/Kconfig linux98/drivers/scsi/Kconfig
--- linux/drivers/scsi/Kconfig	2003-01-09 13:04:25.000000000 +0900
+++ linux98/drivers/scsi/Kconfig	2003-01-10 10:37:00.000000000 +0900
@@ -1730,6 +1730,13 @@
 	  see the picture at
 	  <http://amiga.multigraph.com/photos/oktagon.html>.
 
+config SCSI_PC980155
+	tristate "NEC PC-9801-55 SCSI support"
+	depends on X86_PC9800 && SCSI
+	help
+	  If you have the NEC PC-9801-55 SCSI interface card or compatibles
+	  for NEC PC-9801/PC-9821, say Y.
+
 #      bool 'Cyberstorm Mk III SCSI support (EXPERIMENTAL)' CONFIG_CYBERSTORMIII_SCSI
 #      bool 'GVP Turbo 040/060 SCSI support (EXPERIMENTAL)' CONFIG_GVP_TURBO_SCSI
 endmenu
diff -Nru linux/drivers/scsi/Makefile linux98/drivers/scsi/Makefile
--- linux/drivers/scsi/Makefile	2003-01-09 13:04:23.000000000 +0900
+++ linux98/drivers/scsi/Makefile	2003-01-10 10:37:00.000000000 +0900
@@ -31,6 +31,7 @@
 obj-$(CONFIG_A3000_SCSI)	+= a3000.o	wd33c93.o
 obj-$(CONFIG_A2091_SCSI)	+= a2091.o	wd33c93.o
 obj-$(CONFIG_GVP11_SCSI)	+= gvp11.o	wd33c93.o
+obj-$(CONFIG_SCSI_PC980155)	+= pc980155.o	wd33c93.o
 obj-$(CONFIG_MVME147_SCSI)	+= mvme147.o	wd33c93.o
 obj-$(CONFIG_SGIWD93_SCSI)	+= sgiwd93.o	wd33c93.o
 obj-$(CONFIG_CYBERSTORM_SCSI)	+= NCR53C9x.o	cyberstorm.o
@@ -124,10 +125,17 @@
 obj-$(CONFIG_BLK_DEV_SR)	+= sr_mod.o
 obj-$(CONFIG_CHR_DEV_SG)	+= sg.o
 
-scsi_mod-objs	:= scsi.o hosts.o scsi_ioctl.o constants.o scsicam.o \
+scsi_mod-objs	:= scsi.o hosts.o scsi_ioctl.o constants.o \
 		   scsi_error.o scsi_lib.o scsi_scan.o scsi_syms.o \
 		   scsi_sysfs.o
 
+ifneq ($(CONFIG_X86_PC9800),y)
+scsi_mod-objs	+= scsicam.o
+else
+export-objs	+= wd33c93.o
+scsi_mod-objs	+= scsicam98.o
+endif
+
 ifdef CONFIG_PROC_FS
 scsi_mod-objs	+= scsi_proc.o
 endif
diff -Nru linux/drivers/scsi/pc980155.c linux98/drivers/scsi/pc980155.c
--- linux/drivers/scsi/pc980155.c	1970-01-01 09:00:00.000000000 +0900
+++ linux98/drivers/scsi/pc980155.c	2002-12-15 12:09:04.000000000 +0900
@@ -0,0 +1,263 @@
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/blk.h>
+#include <linux/sched.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <linux/module.h>
+
+#include "scsi.h"
+#include "hosts.h"
+#include "wd33c93.h"
+#include "pc980155.h"
+#include "pc980155regs.h"
+
+#define DEBUG
+
+#include<linux/stat.h>
+
+static inline void __print_debug_info(unsigned int);
+static inline void __print_debug_info(unsigned int a){}
+#define print_debug_info() __print_debug_info(base_io);
+
+#define NR_BASE_IOS 4
+static int nr_base_ios = NR_BASE_IOS;
+static unsigned int base_ios[NR_BASE_IOS] = {0xcc0, 0xcd0, 0xce0, 0xcf0};
+static unsigned int  SASR;
+static unsigned int  SCMD;
+static wd33c93_regs regs = {&SASR, &SCMD};
+
+static struct Scsi_Host *pc980155_host = NULL;
+
+static void pc980155_intr_handle(int irq, void *dev_id, struct pt_regs *regp);
+
+inline void pc980155_dma_enable(unsigned int base_io){
+  outb(0x01, REG_CWRITE);
+  WAIT();
+}
+inline void pc980155_dma_disable(unsigned int base_io){
+  outb(0x02, REG_CWRITE);
+  WAIT();
+}
+
+
+static void pc980155_intr_handle(int irq, void *dev_id, struct pt_regs *regp)
+{
+  wd33c93_intr(pc980155_host);
+}
+
+static int dma_setup(Scsi_Cmnd *sc, int dir_in){
+  /*
+   * sc->SCp.this_residual : transfer count
+   * sc->SCp.ptr : distination address (virtual address)
+   * dir_in : data direction (DATA_OUT_DIR:0 or DATA_IN_DIR:1)
+   *
+   * if success return 0
+   */
+
+   /*
+    * DMA WRITE MODE
+    * bit 7,6 01b single mode (this mode only)
+    * bit 5   inc/dec (default:0 = inc)
+    * bit 4   auto initialize (normaly:0 = off)
+    * bit 3,2 01b memory -> io
+    *         10b io -> memory
+    *         00b verify
+    * bit 1,0 channel
+    */
+  disable_dma(sc->host->dma_channel);
+  set_dma_mode(sc->host->dma_channel, 0x40 | (dir_in ? 0x04 : 0x08));
+  clear_dma_ff(sc->host->dma_channel);
+  set_dma_addr(sc->host->dma_channel, virt_to_phys(sc->SCp.ptr));
+  set_dma_count(sc->host->dma_channel, sc->SCp.this_residual);
+#if 0
+#ifdef DEBUG
+  printk("D%d(%x)D", sc->SCp.this_residual);
+#endif
+#endif
+  enable_dma(sc->host->dma_channel);
+
+  pc980155_dma_enable(sc->host->io_port);
+
+  return 0;
+}
+
+static void dma_stop(struct Scsi_Host *instance, Scsi_Cmnd *sc, int status){
+  /*
+   * instance: Hostadapter's instance
+   * sc: scsi command
+   * status: True if success
+   */
+
+  pc980155_dma_disable(sc->host->io_port);
+
+  disable_dma(sc->host->dma_channel);
+}  
+
+/* return non-zero on detection */
+static inline int pc980155_test_port(wd33c93_regs regs)
+{
+	/* Quick and dirty test for presence of the card. */
+	if (READ_AUX_STAT() == 0xff)
+		return 0;
+	return 1;
+}
+
+static inline int
+pc980155_getconfig(unsigned int base_io, wd33c93_regs regs,
+		    unsigned char* irq, unsigned char* dma,
+		    unsigned char* scsi_id)
+{
+	static unsigned char irqs[] = { 3, 5, 6, 9, 12, 13 };
+	unsigned char result;
+  
+	printk(KERN_DEBUG "PC-9801-55: base_io=%x SASR=%x SCMD=%x\n",
+		base_io, *regs.SASR, *regs.SCMD);
+	result = read_wd33c93(regs, WD_RESETINT);
+	printk(KERN_DEBUG "PC-9801-55: getting config (%x)\n", result);
+	*scsi_id = result & 0x07;
+	*irq = (result >> 3) & 0x07;
+	if (*irq > 5) {
+		printk(KERN_ERR "PC-9801-55 (base %#x): impossible IRQ (%d)"
+			" - other device here?\n", base_io, *irq);
+		return 0;
+	}
+
+	*irq = irqs[*irq];
+	result = inb(REG_STATRD);
+	WAIT();
+	*dma = result & 0x03;
+	if (*dma == 1) {
+		printk(KERN_ERR
+			"PC-9801-55 (base %#x): impossible DMA channl (%d)"
+			" - other device here?\n", base_io, *dma);
+		return 0;
+	}
+#ifdef DEBUG
+	printk("PC-9801-55: end of getconfig\n");
+#endif
+	return 1;
+}
+
+/* return non-zero on detection */
+int scsi_pc980155_detect(Scsi_Host_Template* tpnt)
+{
+	unsigned int base_io;
+	unsigned char irq, dma, scsi_id;
+	int i;
+#ifdef DEBUG
+	unsigned char debug;
+#endif
+  
+	for (i = 0; i < nr_base_ios; i++) {
+		base_io = base_ios[i];
+		SASR = REG_ADDRST;
+		SCMD = REG_CONTRL;
+
+    /*    printk("PC-9801-55: SASR(%x = %x)\n", SASR, REG_ADDRST); */
+		if (check_region(base_io, 6))
+			continue;
+		if (! pc980155_test_port(regs))
+			continue;
+
+		if (!pc980155_getconfig(base_io, regs, &irq, &dma, &scsi_id))
+			continue;
+#ifdef DEBUG
+		printk("PC-9801-55: config: base io = %x, irq = %d, dma channel = %d, scsi id = %d\n",
+			base_io, irq, dma, scsi_id);
+#endif
+		if (request_irq(irq, pc980155_intr_handle, 0, "PC-9801-55",
+				 NULL)) {
+			printk(KERN_ERR
+				"PC-9801-55: unable to allocate IRQ %d\n",
+				irq);
+			continue;
+		}
+		if (request_dma(dma, "PC-9801-55")) {
+			printk(KERN_ERR "PC-9801-55: "
+				"unable to allocate DMA channel %d\n", dma);
+			free_irq(irq, NULL);
+			continue;
+		}
+
+		request_region(base_io, 6, "PC-9801-55");
+		pc980155_host = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
+		pc980155_host->this_id = scsi_id;
+		pc980155_host->io_port = base_io;
+		pc980155_host->n_io_port = 6;
+		pc980155_host->irq = irq;
+		pc980155_host->dma_channel = dma;
+
+#ifdef DEBUG
+		printk("PC-9801-55: scsi host found at %x irq = %d, use dma channel %d.\n", base_io, irq, dma);
+		debug = read_aux_stat(regs);
+		printk("PC-9801-55: aux: %x ", debug);
+		debug = read_wd33c93(regs, 0x17);
+		printk("status: %x\n", debug);
+#endif
+
+		pc980155_int_enable(regs);
+  
+		wd33c93_init(pc980155_host, regs, dma_setup, dma_stop,
+			      WD33C93_FS_12_15);
+    
+		return 1;
+	}
+
+	printk("PC-9801-55: not found\n");
+	return 0;
+}
+
+int pc980155_proc_info(char *buf, char **start, off_t off, int len,
+			int hostno, int in)
+{
+	/* NOT SUPPORTED YET! */
+
+	if (in) {
+		return -EPERM;
+	}
+	*start = buf;
+	return sprintf(buf, "Sorry, not supported yet.\n");
+}
+
+int pc980155_setup(char *str)
+{
+next:
+  if (!strncmp(str, "io:", 3)){
+    base_ios[0] = simple_strtoul(str+3,NULL,0);
+    nr_base_ios = 1;
+    while (*str > ' ' && *str != ',')
+      str++;
+    if (*str == ','){
+      str++;
+      goto next;
+    }
+  }
+  return 0;
+}
+
+int scsi_pc980155_release(struct Scsi_Host *pc980155_host)
+{
+#ifdef MODULE
+        pc980155_int_disable(regs);
+        release_region(pc980155_host->io_port, pc980155_host->n_io_port);
+        free_irq(pc980155_host->irq, NULL);
+        free_dma(pc980155_host->dma_channel);
+        wd33c93_release();
+#endif
+    return 1;
+}
+
+__setup("pc980155=", pc980155_setup);
+
+Scsi_Host_Template driver_template = SCSI_PC980155;
+
+#include "scsi_module.c"
diff -Nru linux/drivers/scsi/pc980155.h linux98/drivers/scsi/pc980155.h
--- linux/drivers/scsi/pc980155.h	1970-01-01 09:00:00.000000000 +0900
+++ linux98/drivers/scsi/pc980155.h	2002-12-15 12:05:05.000000000 +0900
@@ -0,0 +1,47 @@
+/*
+ *  PC-9801-55 SCSI host adapter driver
+ *
+ *  Copyright (C) 1997-2000  Kyoto University Microcomputer Club
+ *			     (Linux/98 project)
+ */
+
+#ifndef _SCSI_PC9801_55_H
+#define _SCSI_PC9801_55_H
+
+#include <linux/types.h>
+#include <linux/kdev_t.h>
+#include <scsi/scsicam.h>
+
+int wd33c93_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
+int wd33c93_abort(Scsi_Cmnd *);
+int wd33c93_reset(Scsi_Cmnd *, unsigned int);
+int scsi_pc980155_detect(Scsi_Host_Template *);
+int scsi_pc980155_release(struct Scsi_Host *);
+int pc980155_proc_info(char *, char **, off_t, int, int, int);
+
+#ifndef CMD_PER_LUN
+#define CMD_PER_LUN 2
+#endif
+
+#ifndef CAN_QUEUE
+#define CAN_QUEUE 16
+#endif
+
+#define SCSI_PC980155 {	.proc_name =		"PC-9801-55",		\
+  			.name =			"SCSI PC-9801-55",	\
+			.proc_info =		pc980155_proc_info,	\
+			.detect =		scsi_pc980155_detect,	\
+			.release =		scsi_pc980155_release,	\
+			/* command: use queue command */		\
+			.queuecommand =		wd33c93_queuecommand,	\
+			.abort =		wd33c93_abort,		\
+			.reset =		wd33c93_reset,		\
+			.bios_param =		scsicam_bios_param,	\
+			.can_queue =		CAN_QUEUE,		\
+			.this_id =		7,			\
+			.sg_tablesize =		SG_ALL,			 \
+			.cmd_per_lun =		CMD_PER_LUN, /* dont use link command */ \
+			.unchecked_isa_dma =	1, /* use dma **XXXX***/ \
+			.use_clustering =	ENABLE_CLUSTERING }
+
+#endif /* _SCSI_PC9801_55_H */
diff -Nru linux/drivers/scsi/pc980155regs.h linux98/drivers/scsi/pc980155regs.h
--- linux/drivers/scsi/pc980155regs.h	1970-01-01 09:00:00.000000000 +0900
+++ linux98/drivers/scsi/pc980155regs.h	2001-12-03 18:44:10.000000000 +0900
@@ -0,0 +1,89 @@
+#ifndef __PC980155REGS_H
+#define __PC980155REGS_H
+
+#include "wd33c93.h"
+
+#define REG_ADDRST (base_io+0)
+#define REG_CONTRL (base_io+2)
+#define REG_CWRITE (base_io+4)
+#define REG_STATRD (base_io+4)
+
+#define WD_MEMORYBANK 0x30
+#define WD_RESETINT   0x33
+
+#if 0
+#define WAIT() outb(0x00,0x5f)
+#else
+#define WAIT() do{}while(0)
+#endif
+
+static inline uchar read_wd33c93(const wd33c93_regs regs, uchar reg_num)
+{
+  uchar data;
+  outb(reg_num, *regs.SASR);
+  WAIT();
+  data = inb(*regs.SCMD);
+  WAIT();
+  return data;
+}
+
+static inline uchar read_aux_stat(const wd33c93_regs regs)
+{
+  uchar result;
+  result = inb(*regs.SASR);
+  WAIT();
+  /*  printk("PC-9801-55: regp->SASR(%x) = %x\n", regp->SASR, result); */
+  return result;
+}
+#define READ_AUX_STAT() read_aux_stat(regs)
+
+static inline void write_wd33c93(const wd33c93_regs regs, uchar reg_num,
+				 uchar value)
+{
+  outb(reg_num, *regs.SASR);
+  WAIT();
+  outb(value, *regs.SCMD);
+  WAIT();
+}
+
+
+#define write_wd33c93_cmd(regs,cmd) write_wd33c93(regs,WD_COMMAND,cmd)
+
+static inline void write_wd33c93_count(const wd33c93_regs regs,
+					unsigned long value)
+{
+   outb(WD_TRANSFER_COUNT_MSB, *regs.SASR);
+   WAIT();
+   outb((value >> 16) & 0xff, *regs.SCMD);
+   WAIT();
+   outb((value >> 8)  & 0xff, *regs.SCMD);
+   WAIT();
+   outb( value        & 0xff, *regs.SCMD);
+   WAIT();
+}
+
+
+static inline unsigned long read_wd33c93_count(const wd33c93_regs regs)
+{
+unsigned long value;
+
+   outb(WD_TRANSFER_COUNT_MSB, *regs.SASR);
+   value = inb(*regs.SCMD) << 16;
+   value |= inb(*regs.SCMD) << 8;
+   value |= inb(*regs.SCMD);
+   return value;
+}
+
+static inline void write_wd33c93_cdb(const wd33c93_regs regs, unsigned int len,
+					unsigned char cmnd[])
+{
+  int i;
+  outb(WD_CDB_1, *regs.SASR);
+  for (i=0; i<len; i++)
+    outb(cmnd[i], *regs.SCMD);
+}
+
+#define pc980155_int_enable(regs)  write_wd33c93(regs, WD_MEMORYBANK, read_wd33c93(regs, WD_MEMORYBANK) | 0x04)
+#define pc980155_int_disable(regs) write_wd33c93(regs, WD_MEMORYBANK, read_wd33c93(regs, WD_MEMORYBANK) & ~0x04)
+
+#endif
diff -Nru linux/drivers/scsi/scsi_scan.c linux98/drivers/scsi/scsi_scan.c
--- linux/drivers/scsi/scsi_scan.c	2002-12-24 14:21:04.000000000 +0900
+++ linux98/drivers/scsi/scsi_scan.c	2002-12-26 14:28:56.000000000 +0900
@@ -128,6 +128,7 @@
 	{"MITSUMI", "CD-R CR-2201CS", "6119", BLIST_NOLUN},	/* locks up */
 	{"RELISYS", "Scorpio", NULL, BLIST_NOLUN},	/* responds to all lun */
 	{"MICROTEK", "ScanMaker II", "5.61", BLIST_NOLUN},	/* responds to all lun */
+	{"NEC", "D3856", "0009", BLIST_NOLUN},
 
 	/*
 	 * Other types of devices that have special flags.
diff -Nru linux/drivers/scsi/scsi_syms.c linux98/drivers/scsi/scsi_syms.c
--- linux/drivers/scsi/scsi_syms.c	2002-12-24 14:20:26.000000000 +0900
+++ linux98/drivers/scsi/scsi_syms.c	2002-12-26 14:28:56.000000000 +0900
@@ -97,6 +97,10 @@
 EXPORT_SYMBOL(scsi_host_put);
 EXPORT_SYMBOL(scsi_device_types);
 
+/* For PC-9800 architecture support */
+extern struct scsi_device *sd_find_params_by_bdev(struct block_device *, char **, sector_t *);
+EXPORT_SYMBOL(sd_find_params_by_bdev);
+
 /*
  * This is for st to find the bounce limit
  */
diff -Nru linux/drivers/scsi/scsicam98.c linux98/drivers/scsi/scsicam98.c
--- linux/drivers/scsi/scsicam98.c	1970-01-01 09:00:00.000000000 +0900
+++ linux98/drivers/scsi/scsicam98.c	2002-12-14 14:55:28.000000000 +0900
@@ -0,0 +1,192 @@
+/*
+ *
+ *  scsicam98.c
+ *   SCSI CAM support functions for NEC PC-9801 , use for HDIO_GETGEO, etc.
+ *
+ *  Copyright (c) 1999-2002 Osamu Tomita <tomita@cinet.co.jp>
+ *    Based on scsicam.c written by Drew Eckhardt
+ *
+ */
+
+#include <linux/module.h>
+
+#include <linux/fs.h>
+#include <linux/genhd.h>
+#include <linux/kernel.h>
+#include <linux/blk.h>
+#include <linux/buffer_head.h>
+#include <asm/unaligned.h>
+#include "scsi.h"
+#include "hosts.h"
+#include <scsi/scsicam.h>
+#include <asm/pc9800.h>
+
+
+unsigned char *scsi_bios_ptable(struct block_device *dev)
+{
+	unsigned char *res = kmalloc(66, GFP_KERNEL);
+	if (res) {
+		struct block_device *bdev = dev->bd_contains;
+		struct buffer_head *bh = __bread(bdev, 0, block_size(bdev));
+		if (bh) {
+			memcpy(res, bh->b_data + 0x1be, 66);
+			brelse(bh);
+		} else {
+			kfree(res);
+			res = NULL;
+		}
+	}
+	return res;
+}
+
+/*
+ * Function : static int scsi_partsize(unsigned char *buf, unsigned long 
+ *     capacity,unsigned int *cyls, unsigned int *hds, unsigned int *secs);
+ *
+ * Purpose : to determine the BIOS mapping used to create the partition
+ *      table, storing the results in *cyls, *hds, and *secs 
+ *
+ * Returns : -1 on failure, 0 on success.
+ *
+ */
+
+int scsi_partsize(unsigned char *buf, unsigned long capacity,
+	       unsigned int *cyls, unsigned int *hds, unsigned int *secs)
+{
+	struct partition *p = (struct partition *)buf, *largest = NULL;
+	int i, largest_cyl;
+	int cyl, ext_cyl, end_head, end_cyl, end_sector;
+	unsigned int logical_end, physical_end, ext_physical_end;
+
+
+	if (*(unsigned short *) (buf + 64) == 0xAA55) {
+		for (largest_cyl = -1, i = 0; i < 4; ++i, ++p) {
+			if (!p->sys_ind)
+				continue;
+#ifdef DEBUG
+			printk("scsicam98 : partition %d has system \n", i);
+#endif
+			cyl = p->cyl + ((p->sector & 0xc0) << 2);
+			if (cyl > largest_cyl) {
+				largest_cyl = cyl;
+				largest = p;
+			}
+		}
+	}
+	if (largest) {
+		end_cyl = largest->end_cyl + ((largest->end_sector & 0xc0) << 2);
+		end_head = largest->end_head;
+		end_sector = largest->end_sector & 0x3f;
+
+		if (end_head + 1 == 0 || end_sector == 0)
+			return -1;
+
+#ifdef DEBUG
+		printk("scsicam98 : end at h = %d, c = %d, s = %d\n",
+		       end_head, end_cyl, end_sector);
+#endif
+
+		physical_end = end_cyl * (end_head + 1) * end_sector +
+		    end_head * end_sector + end_sector;
+
+		/* This is the actual _sector_ number at the end */
+		logical_end = get_unaligned(&largest->start_sect)
+		    + get_unaligned(&largest->nr_sects);
+
+		/* This is for >1023 cylinders */
+		ext_cyl = (logical_end - (end_head * end_sector + end_sector))
+		    / (end_head + 1) / end_sector;
+		ext_physical_end = ext_cyl * (end_head + 1) * end_sector +
+		    end_head * end_sector + end_sector;
+
+#ifdef DEBUG
+		printk("scsicam98 : logical_end=%d physical_end=%d ext_physical_end=%d ext_cyl=%d\n"
+		  ,logical_end, physical_end, ext_physical_end, ext_cyl);
+#endif
+
+		if ((logical_end == physical_end) ||
+		  (end_cyl == 1023 && ext_physical_end == logical_end)) {
+			*secs = end_sector;
+			*hds = end_head + 1;
+			*cyls = capacity / ((end_head + 1) * end_sector);
+			return 0;
+		}
+#ifdef DEBUG
+		printk("scsicam98 : logical (%u) != physical (%u)\n",
+		       logical_end, physical_end);
+#endif
+	}
+	return -1;
+}
+
+/* XXX - For now, we assume the first (i.e. having the least host_no)
+   real (i.e. non-emulated) host adapter shall be BIOS-controlled one.
+   We *SHOULD* invent another way.  */
+
+static inline struct Scsi_Host *first_real_host(void)
+{
+	struct Scsi_Host *h = NULL;
+
+	while ((h = scsi_host_get_next(h)))
+		if (!h->hostt->emulated)
+			break;
+
+	return h;
+}
+
+extern struct scsi_device *sd_find_params_by_bdev(struct block_device *, char **, sector_t *);
+
+/*
+ * Function : int scsicam_bios_param (struct block_device *bdev, ector_t capacity, int *ip)
+ *
+ * Purpose : to determine the BIOS mapping used for a drive in a 
+ *      SCSI-CAM system, storing the results in ip as required
+ *      by the HDIO_GETGEO ioctl().
+ *
+ * Returns : -1 on failure, 0 on success.
+ *
+ */
+
+int scsicam_bios_param(struct block_device *bdev, sector_t capacity, int *ip)
+{
+	char *name;
+	struct scsi_device *device = sd_find_params_by_bdev(bdev, &name, NULL);
+
+	if (device && first_real_host() == device->host && device->id < 7
+	    && __PC9800SCA_TEST_BIT(PC9800SCA_DISK_EQUIPS, device->id))
+	{
+		const u8 *p = (&__PC9800SCA(u8, PC9800SCA_SCSI_PARAMS)
+			       + device->id * 4);
+
+		ip[0] = p[1];	/* # of heads */
+		ip[1] = p[0];	/* # of sectors/track */
+		ip[2] = *(u16 *)&p[2] & 0x0FFF;	/* # of cylinders */
+		if (p[3] & (1 << 6)) { /* #-of-cylinders is 16-bit */
+			ip[2] |= (ip[0] & 0xF0) << 8;
+			ip[0] &= 0x0F;
+		}
+		printk(KERN_INFO "%s: "
+			"BIOS parameters CHS:%d/%d/%d, %u bytes %s sector\n",
+			name, ip[2], ip[0], ip[1], 256 << ((p[3] >> 4) & 3),
+			p[3] & 0x80 ? "hard" : "soft");
+		return 0;
+	}
+
+	/* Assume PC-9801-92 compatible parameters for HAs without BIOS.  */
+	ip[0] = 8;
+	ip[1] = 32;
+	ip[2] = capacity / (8 * 32);
+	if (ip[2] > 65535) {	/* if capacity >= 8GB */
+		/* Recent on-board adapters seem to use this parameter.  */
+		ip[1] = 128;
+		ip[2] = capacity / (8 * 128);
+		if (ip[2] > 65535) { /* if capacity >= 32GB  */
+			/* Clip the number of cylinders.  Currently this
+			   is the limit that we deal with.  */
+			ip[2] = 65535;
+		}
+	}
+	printk(KERN_INFO "%s: BIOS parameters CHS:%d/%d/%d (assumed)\n",
+		name, ip[2], ip[0], ip[1]);
+	return 0;
+}
diff -Nru linux/drivers/scsi/sd.c linux98/drivers/scsi/sd.c
--- linux/drivers/scsi/sd.c	2003-01-14 14:59:09.000000000 +0900
+++ linux98/drivers/scsi/sd.c	2003-01-14 23:19:49.000000000 +0900
@@ -480,7 +480,7 @@
        	diskinfo[2] = sdkp->capacity >> 11;
 	
 	/* override with calculated, extended default, or driver values */
-	if (host->hostt->bios_param)
+	if (!pc98 && host->hostt->bios_param)
 		host->hostt->bios_param(sdp, bdev, sdkp->capacity, diskinfo);
 	else
 		scsicam_bios_param(bdev, sdkp->capacity, diskinfo);
@@ -1377,6 +1377,27 @@
 	kfree(sdkp);
 }
 
+struct scsi_device *sd_find_params_by_bdev(struct block_device *bdev, char **disk_name, sector_t *capacity)
+{
+	struct scsi_disk *sdkp;
+	int major = major(to_kdev_t(bdev->bd_dev));
+
+	spin_lock(&sd_devlist_lock);
+	list_for_each_entry(sdkp, &sd_devlist, list) {
+		if (sdkp->disk->major == major) {
+			if (capacity)
+				*capacity = sdkp->capacity;
+			if (disk_name)
+				*disk_name = sdkp->disk->disk_name;
+			spin_unlock(&sd_devlist_lock);
+			return sdkp->device;
+		}
+	}
+
+	spin_unlock(&sd_devlist_lock);
+	return NULL;
+}
+
 /**
  *	init_sd - entry point for this driver (both when built in or when
  *	a module).
diff -Nru linux/drivers/scsi/wd33c93.c linux98/drivers/scsi/wd33c93.c
--- linux/drivers/scsi/wd33c93.c	2003-01-02 12:22:29.000000000 +0900
+++ linux98/drivers/scsi/wd33c93.c	2003-01-04 16:17:32.000000000 +0900
@@ -84,6 +84,7 @@
 #include <linux/init.h>
 #include <asm/irq.h>
 #include <linux/blk.h>
+#include <linux/spinlock.h>
 
 #include "scsi.h"
 #include "hosts.h"
@@ -173,7 +174,11 @@
 MODULE_PARM(setup_strings, "s");
 #endif
 
+static spinlock_t wd_lock = SPIN_LOCK_UNLOCKED;
 
+#if defined(CONFIG_SCSI_PC980155) || defined(CONFIG_SCSI_PC980155_MODULE)
+#include "pc980155regs.h"
+#else /* !CONFIG_SCSI_PC980155 */
 
 static inline uchar read_wd33c93(const wd33c93_regs regs, uchar reg_num)
 {
@@ -203,6 +208,7 @@
    *regs.SCMD = cmd;
    mb();
 }
+#endif /* CONFIG_SCSI_PC980155 */
 
 
 static inline uchar read_1_byte(const wd33c93_regs regs)
@@ -220,6 +226,7 @@
    return x;
 }
 
+#if !defined(CONFIG_SCSI_PC980155) && !defined(CONFIG_SCSI_PC980155_MODULE)
 
 static void write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
 {
@@ -244,6 +251,7 @@
    mb();
    return value;
 }
+#endif /* !CONFIG_SCSI_PC980155 */
 
 
 /* The 33c93 needs to be told which direction a command transfers its
@@ -426,7 +434,6 @@
 struct WD33C93_hostdata *hostdata = (struct WD33C93_hostdata *)instance->hostdata;
 const wd33c93_regs regs = hostdata->regs;
 Scsi_Cmnd *cmd, *prev;
-int i;
 
 DB(DB_EXECUTE,printk("EX("))
 
@@ -589,9 +596,16 @@
     * (take advantage of auto-incrementing)
     */
 
-      *regs.SASR = WD_CDB_1;
-      for (i=0; i<cmd->cmd_len; i++)
-         *regs.SCMD = cmd->cmnd[i];
+#if defined(CONFIG_SCSI_PC980155) || defined(CONFIG_SCSI_PC980155_MODULE)
+      write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd);
+#else /* !CONFIG_SCSI_PC980155 */
+      {
+         int i;
+         *regs.SASR = WD_CDB_1;
+         for (i = 0; i < cmd->cmd_len; i++)
+            *regs.SCMD = cmd->cmnd[i];
+      }
+#endif /* CONFIG_SCSI_PC980155 */
 
    /* The wd33c93 only knows about Group 0, 1, and 5 commands when
     * it's doing a 'select-and-transfer'. To be safe, we write the
@@ -1703,7 +1717,7 @@
    return 1;
 }
 
-__setup("wd33c93", wd33c93_setup);
+__setup("wd33c93=", wd33c93_setup);
 
 
 /* check_setup_args() returns index if key found, 0 if not
@@ -2037,4 +2051,10 @@
 {
 }
 
+EXPORT_SYMBOL(wd33c93_reset);
+EXPORT_SYMBOL(wd33c93_init);
+EXPORT_SYMBOL(wd33c93_release);
+EXPORT_SYMBOL(wd33c93_abort);
+EXPORT_SYMBOL(wd33c93_queuecommand);
+EXPORT_SYMBOL(wd33c93_intr);
 MODULE_LICENSE("GPL");
diff -Nru linux/drivers/scsi/wd33c93.h linux98/drivers/scsi/wd33c93.h
--- linux/drivers/scsi/wd33c93.h	2002-10-12 13:21:35.000000000 +0900
+++ linux98/drivers/scsi/wd33c93.h	2002-10-12 14:18:53.000000000 +0900
@@ -186,8 +186,13 @@
 
    /* This is what the 3393 chip looks like to us */
 typedef struct {
+#if defined(CONFIG_SCSI_PC980155) || defined(CONFIG_SCSI_PC980155_MODULE)
+   volatile unsigned int   *SASR;
+   volatile unsigned int   *SCMD;
+#else
    volatile unsigned char  *SASR;
    volatile unsigned char  *SCMD;
+#endif
 } wd33c93_regs;
 
 
-
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