Summary:
IDE driver modules
- IO port address change.
- add support PC-9800 specific feature. (shared IRQ, serialize)
diffstat:
drivers/ide/Config.in | 4
drivers/ide/ide-disk.c | 67 +++
drivers/ide/ide-geometry.c | 2
drivers/ide/ide-probe.c | 25 +
drivers/ide/ide-proc.c | 3
drivers/ide/ide.c | 14
drivers/ide/legacy/Makefile | 5
drivers/ide/legacy/hd98.c | 856 ++++++++++++++++++++++++++++++++++++++++++++
drivers/ide/legacy/pc9800.c | 82 ++++
include/asm-i386/ide.h | 18
include/linux/hdreg.h | 19
include/linux/ide.h | 2
12 files changed, 1093 insertions(+), 4 deletions(-)
patch:
diff -urN linux/drivers/ide/Config.in linux98/drivers/ide/Config.in
--- linux/drivers/ide/Config.in Sat Oct 12 13:21:33 2002
+++ linux98/drivers/ide/Config.in Sat Oct 12 16:42:12 2002
@@ -219,4 +219,8 @@
define_bool CONFIG_BLK_DEV_IDE_MODES n
fi
+if [ "$CONFIG_PC9800" = "y" ]; then
+ define_bool CONFIG_BLK_DEV_IDE_PC9800 y
+fi
+
endmenu
diff -urN linux/drivers/ide/ide-disk.c linux98/drivers/ide/ide-disk.c
--- linux/drivers/ide/ide-disk.c Sat Oct 12 13:21:42 2002
+++ linux98/drivers/ide/ide-disk.c Sat Oct 12 16:53:36 2002
@@ -1717,6 +1717,71 @@
blk_queue_max_sectors(&drive->queue, 2048);
#endif
+#ifdef CONFIG_PC9800
+ /* XXX - need more checks */
+ if (!drive->nobios && !drive->scsi && !drive->removable) {
+ /* PC-9800's BIOS do pack drive numbers to be continuous,
+ so extra work is needed here. */
+
+ /* drive information passed from boot/setup.S */
+ struct drive_info_struct {
+ u16 cyl;
+ u8 sect, head;
+ u16 ssize;
+ } __attribute__ ((packed));
+ extern struct drive_info_struct drive_info[];
+
+ /* this pointer must be advanced only when *DRIVE is
+ really hard disk. */
+ static struct drive_info_struct *info = drive_info;
+
+ if (info < &drive_info[4] && info->cyl) {
+ drive->cyl = drive->bios_cyl = info->cyl;
+ drive->head = drive->bios_head = info->head;
+ drive->sect = drive->bios_sect = info->sect;
+ ++info;
+ }
+ }
+
+ /* =PC98 MEMO=
+ physical capacity =< 65535*8*17 sect. : H/S=8/17 (fixed)
+ physical capacity > 65535*8*17 sect. : use physical geometry
+ (65535*8*17 = 8912760 sectors)
+ */
+ printk("%s: CHS: physical %d/%d/%d, logical %d/%d/%d, BIOS %d/%d/%d\n",
+ drive->name,
+ id->cyls, id->heads, id->sectors,
+ id->cur_cyls, id->cur_heads, id->cur_sectors,
+ drive->bios_cyl, drive->bios_head,drive->bios_sect);
+ if (!drive->cyl || !drive->head || !drive->sect) {
+ drive->cyl = drive->bios_cyl = id->cyls;
+ drive->head = drive->bios_head = id->heads;
+ drive->sect = drive->bios_sect = id->sectors;
+ printk("%s: not BIOS-supported device.\n",drive->name);
+ }
+ /* calculate drive capacity, and select LBA if possible */
+ init_idedisk_capacity(drive);
+
+ /*
+ * if possible, give fdisk access to more of the drive,
+ * by correcting bios_cyls:
+ */
+ capacity = idedisk_capacity(drive);
+ if (capacity < 8912760 &&
+ (drive->head != 8 || drive->sect != 17)) {
+ drive->head = drive->bios_head = 8;
+ drive->sect = drive->bios_sect = 17;
+ drive->cyl = drive->bios_cyl =
+ capacity / (drive->bios_head * drive->bios_sect);
+ printk("%s: Fixing Geometry :: CHS=%d/%d/%d to CHS=%d/%d/%d\n",
+ drive->name,
+ id->cur_cyls,id->cur_heads,id->cur_sectors,
+ drive->bios_cyl,drive->bios_head,drive->bios_sect);
+ id->cur_cyls = drive->bios_cyl;
+ id->cur_heads = drive->bios_head;
+ id->cur_sectors = drive->bios_sect;
+ }
+#else /* !CONFIG_PC9800 */
/* Extract geometry if we did not already have one for the drive */
if (!drive->cyl || !drive->head || !drive->sect) {
drive->cyl = drive->bios_cyl = id->cyls;
@@ -1750,6 +1815,8 @@
if ((capacity >= (drive->bios_cyl * drive->bios_sect * drive->bios_head)) &&
(!drive->forced_geom) && drive->bios_sect && drive->bios_head)
drive->bios_cyl = (capacity / drive->bios_sect) / drive->bios_head;
+#endif /* CONFIG_PC9800 */
+
printk (KERN_INFO "%s: %ld sectors", drive->name, capacity);
/* Give size in megabytes (MB), not mebibytes (MiB). */
diff -urN linux/drivers/ide/ide-geometry.c linux98/drivers/ide/ide-geometry.c
--- linux/drivers/ide/ide-geometry.c Mon Sep 16 11:18:50 2002
+++ linux98/drivers/ide/ide-geometry.c Mon Sep 16 14:43:38 2002
@@ -6,6 +6,7 @@
#include <linux/mc146818rtc.h>
#include <asm/io.h>
+#ifndef CONFIG_PC9800
/*
* We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc
* controller that is BIOS compatible with ST-506, and thus showing up in our
@@ -81,6 +82,7 @@
}
#endif
}
+#endif /* !CONFIG_PC9800 */
extern ide_drive_t * get_info_ptr(kdev_t);
diff -urN linux/drivers/ide/ide-probe.c linux98/drivers/ide/ide-probe.c
--- linux/drivers/ide/ide-probe.c Sat Oct 12 13:22:09 2002
+++ linux98/drivers/ide/ide-probe.c Sat Oct 12 16:57:12 2002
@@ -552,7 +552,11 @@
if (hwif->mmio == 2)
return 0;
+#ifndef CONFIG_PC9800
addr_errs = hwif_check_region(hwif->io_ports[IDE_DATA_OFFSET], 1);
+#else
+ addr_errs = hwif_check_region(hwif->io_ports[IDE_DATA_OFFSET], 2);
+#endif
for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; i++)
addr_errs += hwif_check_region(hwif->io_ports[i], 1);
if (hwif->io_ports[IDE_CONTROL_OFFSET])
@@ -600,7 +604,13 @@
return;
}
+#ifndef CONFIG_PC9800
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
+#else
+ /* IDE_DATA_REG is actually word (16 bits) register */
+ hwif_request_region(hwif->io_ports[IDE_DATA_OFFSET], 2, hwif->name);
+ for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET; i++)
+#endif
hwif_request_region(hwif->io_ports[i], 1, hwif->name);
}
@@ -618,7 +628,7 @@
if (hwif->noprobe)
return;
-#ifdef CONFIG_BLK_DEV_IDE
+#if !defined(CONFIG_PC9800) && defined(CONFIG_BLK_DEV_IDE)
if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) {
extern void probe_cmos_for_drives(ide_hwif_t *);
probe_cmos_for_drives(hwif);
@@ -629,6 +639,9 @@
#if CONFIG_BLK_DEV_PDC4030
(hwif->chipset != ide_pdc4030 || hwif->channel == 0) &&
#endif /* CONFIG_BLK_DEV_PDC4030 */
+#if CONFIG_BLK_DEV_IDE_PC9800
+ (hwif->chipset != ide_pc9800 || !hwif->mate->present) &&
+#endif
(hwif_check_regions(hwif))) {
u16 msgout = 0;
for (unit = 0; unit < MAX_DRIVES; ++unit) {
@@ -948,7 +961,7 @@
/* all CPUs; safe now that hwif->hwgroup is set up */
spin_unlock_irqrestore(&ide_lock, flags);
-#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__)
+#if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__) && !defined(CONFIG_PC9800)
printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
hwif->io_ports[IDE_DATA_OFFSET],
hwif->io_ports[IDE_DATA_OFFSET]+7,
@@ -958,6 +971,14 @@
hwif->io_ports[IDE_DATA_OFFSET],
hwif->io_ports[IDE_DATA_OFFSET]+7,
hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq));
+#elif defined(CONFIG_PC9800)
+ printk("%s at 0x%03lx-0x%03lx,0x%03lx-0x%03lx on irq %d",
+ hwif->name,
+ hwif->io_ports[IDE_DATA_OFFSET],
+ hwif->io_ports[IDE_DATA_OFFSET]+15,
+ hwif->io_ports[IDE_CONTROL_OFFSET],
+ hwif->io_ports[IDE_CONTROL_OFFSET]+3,
+ hwif->irq);
#else
printk("%s at %x on irq 0x%08x", hwif->name,
hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
diff -urN linux/drivers/ide/ide-proc.c linux98/drivers/ide/ide-proc.c
--- linux/drivers/ide/ide-proc.c Mon Sep 16 11:18:30 2002
+++ linux98/drivers/ide/ide-proc.c Mon Sep 16 13:53:42 2002
@@ -365,6 +365,9 @@
case ide_cy82c693: name = "cy82c693"; break;
case ide_4drives: name = "4drives"; break;
case ide_pmac: name = "mac-io"; break;
+#ifdef CONFIG_PC9800
+ case ide_pc9800: name = "pc9800"; break;
+#endif
default: name = "(unknown)"; break;
}
len = sprintf(page, "%s\n", name);
diff -urN linux/drivers/ide/ide.c linux98/drivers/ide/ide.c
--- linux/drivers/ide/ide.c Wed Oct 16 13:20:35 2002
+++ linux98/drivers/ide/ide.c Wed Oct 16 17:33:01 2002
@@ -1754,7 +1754,13 @@
hwif_release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
return;
}
- for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
+#ifndef CONFIG_PC9800
+#define IDE_REGION_START IDE_DATA_OFFSET
+#else
+#define IDE_REGION_START IDE_ERROR_OFFSET
+ hwif_release_region(hwif->io_ports[IDE_DATA_OFFSET], 2);
+#endif
+ for (i = IDE_REGION_START; i <= IDE_STATUS_OFFSET; i++) {
if (hwif->io_ports[i]) {
hwif_release_region(hwif->io_ports[i], 1);
}
@@ -3144,6 +3150,12 @@
}
#endif /* CONFIG_BLK_DEV_IDEPCI */
+#ifdef CONFIG_BLK_DEV_IDE_PC9800
+ {
+ extern void ide_probe_for_pc9800(void);
+ ide_probe_for_pc9800();
+ }
+#endif
#ifdef CONFIG_ETRAX_IDE
{
extern void init_e100_ide(void);
diff -urN linux/drivers/ide/legacy/Makefile linux98/drivers/ide/legacy/Makefile
--- linux/drivers/ide/legacy/Makefile Sat Oct 12 13:21:34 2002
+++ linux98/drivers/ide/legacy/Makefile Sun Oct 13 11:07:36 2002
@@ -2,6 +2,7 @@
obj-$(CONFIG_BLK_DEV_ALI14XX) += ali14xx.o
obj-$(CONFIG_BLK_DEV_DTC2278) += dtc2278.o
obj-$(CONFIG_BLK_DEV_HT6560B) += ht6560b.o
+obj-$(CONFIG_BLK_DEV_IDE_PC9800) += pc9800.o
obj-$(CONFIG_BLK_DEV_PDC4030) += pdc4030.o
obj-$(CONFIG_BLK_DEV_QD65XX) += qd65xx.o
obj-$(CONFIG_BLK_DEV_UMC8672) += umc8672.o
@@ -15,7 +16,11 @@
obj-$(CONFIG_BLK_DEV_IDECS) += ide-cs.o
# Last of all
+ifneq ($(CONFIG_PC9800),y)
obj-$(CONFIG_BLK_DEV_HD) += hd.o
+else
+obj-$(CONFIG_BLK_DEV_HD) += hd98.o
+endif
EXTRA_CFLAGS := -Idrivers/ide
diff -urN linux/drivers/ide/legacy/hd98.c linux98/drivers/ide/legacy/hd98.c
--- linux/drivers/ide/legacy/hd98.c Thu Jan 1 09:00:00 1970
+++ linux98/drivers/ide/legacy/hd98.c Sun Oct 13 11:16:45 2002
@@ -0,0 +1,856 @@
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * This is the low-level hd interrupt support. It traverses the
+ * request-list, using interrupts to jump between functions. As
+ * all the functions are called within interrupts, we may not
+ * sleep. Special care is recommended.
+ *
+ * modified by Drew Eckhardt to check nr of hd's from the CMOS.
+ *
+ * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
+ * in the early extended-partition checks and added DM partitions
+ *
+ * IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
+ * and general streamlining by Mark Lord.
+ *
+ * Removed 99% of above. Use Mark's ide driver for those options.
+ * This is now a lightweight ST-506 driver. (Paul Gortmaker)
+ *
+ * Modified 1995 Russell King for ARM processor.
+ *
+ * Bugfix: max_sectors must be <= 255 or the wheels tend to come
+ * off in a hurry once you queue things up - Paul G. 02/2001
+ */
+
+/* Uncomment the following if you want verbose error reports. */
+/* #define VERBOSE_ERRORS */
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/genhd.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/mc146818rtc.h> /* CMOS defines */
+#include <linux/init.h>
+#include <linux/blkpg.h>
+#include <linux/hdreg.h>
+
+#define REALLY_SLOW_IO
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define MAJOR_NR HD_MAJOR
+#define DEVICE_NR(device) (minor(device)>>6)
+#include <linux/blk.h>
+
+#include "io_ports.h"
+
+#ifdef __arm__
+#undef HD_IRQ
+#endif
+#include <asm/irq.h>
+#ifdef __arm__
+#define HD_IRQ IRQ_HARDDISK
+#endif
+
+/* Hd controller regster ports */
+
+#define HD_DATA 0x640 /* _CTL when writing */
+#define HD_ERROR 0x642 /* see err-bits */
+#define HD_NSECTOR 0x644 /* nr of sectors to read/write */
+#define HD_SECTOR 0x646 /* starting sector */
+#define HD_LCYL 0x648 /* starting cylinder */
+#define HD_HCYL 0x64a /* high byte of starting cyl */
+#define HD_CURRENT 0x64c /* 101dhhhh , d=drive, hhhh=head */
+#define HD_STATUS 0x64e /* see status-bits */
+#define HD_FEATURE HD_ERROR /* same io address, read=error, write=feature */
+#define HD_PRECOMP HD_FEATURE /* obsolete use of this port - predates IDE */
+#define HD_COMMAND HD_STATUS /* same io address, read=status, write=cmd */
+
+#define HD_CMD 0x74c /* used for resets */
+#define HD_ALTSTATUS 0x74c /* same as HD_STATUS but doesn't clear irq */
+
+/* Bits of HD_STATUS */
+#define ERR_STAT 0x01
+#define INDEX_STAT 0x02
+#define ECC_STAT 0x04 /* Corrected error */
+#define DRQ_STAT 0x08
+#define SEEK_STAT 0x10
+#define SERVICE_STAT SEEK_STAT
+#define WRERR_STAT 0x20
+#define READY_STAT 0x40
+#define BUSY_STAT 0x80
+
+/* Bits for HD_ERROR */
+#define MARK_ERR 0x01 /* Bad address mark */
+#define TRK0_ERR 0x02 /* couldn't find track 0 */
+#define ABRT_ERR 0x04 /* Command aborted */
+#define MCR_ERR 0x08 /* media change request */
+#define ID_ERR 0x10 /* ID field not found */
+#define MC_ERR 0x20 /* media changed */
+#define ECC_ERR 0x40 /* Uncorrectable ECC error */
+#define BBD_ERR 0x80 /* pre-EIDE meaning: block marked bad */
+#define ICRC_ERR 0x80 /* new meaning: CRC error during transfer */
+
+static spinlock_t hd_lock = SPIN_LOCK_UNLOCKED;
+
+#define TIMEOUT_VALUE (6*HZ)
+#define HD_DELAY 0
+
+#define MAX_ERRORS 16 /* Max read/write errors/sector */
+#define RESET_FREQ 8 /* Reset controller every 8th retry */
+#define RECAL_FREQ 4 /* Recalibrate every 4th retry */
+#define MAX_HD 2
+
+#define STAT_OK (READY_STAT|SEEK_STAT)
+#define OK_STATUS(s) (((s)&(STAT_OK|(BUSY_STAT|WRERR_STAT|ERR_STAT)))==STAT_OK)
+
+static void recal_intr(void);
+static void bad_rw_intr(void);
+
+static char recalibrate[MAX_HD];
+static char special_op[MAX_HD];
+
+static int reset;
+static int hd_error;
+
+#define SUBSECTOR(block) (CURRENT->current_nr_sectors > 0)
+
+/*
+ * This struct defines the HD's and their types.
+ */
+struct hd_i_struct {
+ unsigned int head,sect,cyl,wpcom,lzone,ctl;
+};
+
+#ifdef HD_TYPE
+struct hd_i_struct hd_info[] = { HD_TYPE };
+static int NR_HD = ((sizeof (hd_info))/(sizeof (struct hd_i_struct)));
+#else
+struct hd_i_struct hd_info[MAX_HD];
+static int NR_HD;
+#endif
+
+static struct gendisk *hd_gendisk[MAX_HD];
+
+static struct timer_list device_timer;
+
+#define TIMEOUT_VALUE (6*HZ)
+
+#define SET_TIMER \
+ do { \
+ mod_timer(&device_timer, jiffies + TIMEOUT_VALUE); \
+ } while (0)
+
+static void (*do_hd)(void) = NULL;
+#define SET_HANDLER(x) \
+if ((do_hd = (x)) != NULL) \
+ SET_TIMER; \
+else \
+ del_timer(&device_timer);
+
+
+#if (HD_DELAY > 0)
+unsigned long last_req;
+
+unsigned long read_timer(void)
+{
+ extern spinlock_t i8253_lock;
+ unsigned long t, flags;
+ int i;
+
+ spin_lock_irqsave(&i8253_lock, flags);
+ t = jiffies * 11932;
+ outb_p(0, PIT_MODE);
+ i = inb_p(PIT_CH0);
+ i |= inb(PIT_CH0) << 8;
+ spin_unlock_irqrestore(&i8253_lock, flags);
+ return(t - i);
+}
+#endif
+
+void __init hd_setup(char *str, int *ints)
+{
+ int hdind = 0;
+
+ if (ints[0] != 3)
+ return;
+ if (hd_info[0].head != 0)
+ hdind=1;
+ hd_info[hdind].head = ints[2];
+ hd_info[hdind].sect = ints[3];
+ hd_info[hdind].cyl = ints[1];
+ hd_info[hdind].wpcom = 0;
+ hd_info[hdind].lzone = ints[1];
+ hd_info[hdind].ctl = (ints[2] > 8 ? 8 : 0);
+ NR_HD = hdind+1;
+}
+
+static void dump_status (const char *msg, unsigned int stat)
+{
+ char devc;
+
+ devc = !blk_queue_empty(QUEUE) ? 'a' + DEVICE_NR(CURRENT->rq_dev) : '?';
+#ifdef VERBOSE_ERRORS
+ printk("hd%c: %s: status=0x%02x { ", devc, msg, stat & 0xff);
+ if (stat & BUSY_STAT) printk("Busy ");
+ if (stat & READY_STAT) printk("DriveReady ");
+ if (stat & WRERR_STAT) printk("WriteFault ");
+ if (stat & SEEK_STAT) printk("SeekComplete ");
+ if (stat & DRQ_STAT) printk("DataRequest ");
+ if (stat & ECC_STAT) printk("CorrectedError ");
+ if (stat & INDEX_STAT) printk("Index ");
+ if (stat & ERR_STAT) printk("Error ");
+ printk("}\n");
+ if ((stat & ERR_STAT) == 0) {
+ hd_error = 0;
+ } else {
+ hd_error = inb(HD_ERROR);
+ printk("hd%c: %s: error=0x%02x { ", devc, msg, hd_error & 0xff);
+ if (hd_error & BBD_ERR) printk("BadSector ");
+ if (hd_error & ECC_ERR) printk("UncorrectableError ");
+ if (hd_error & ID_ERR) printk("SectorIdNotFound ");
+ if (hd_error & ABRT_ERR) printk("DriveStatusError ");
+ if (hd_error & TRK0_ERR) printk("TrackZeroNotFound ");
+ if (hd_error & MARK_ERR) printk("AddrMarkNotFound ");
+ printk("}");
+ if (hd_error & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
+ printk(", CHS=%d/%d/%d", (inb(HD_HCYL)<<8) + inb(HD_LCYL),
+ inb(HD_CURRENT) & 0xf, inb(HD_SECTOR));
+ if (!blk_queue_empty(QUEUE))
+ printk(", sector=%ld", CURRENT->sector);
+ }
+ printk("\n");
+ }
+#else
+ printk("hd%c: %s: status=0x%02x.\n", devc, msg, stat & 0xff);
+ if ((stat & ERR_STAT) == 0) {
+ hd_error = 0;
+ } else {
+ hd_error = inb(HD_ERROR);
+ printk("hd%c: %s: error=0x%02x.\n", devc, msg, hd_error & 0xff);
+ }
+#endif
+}
+
+void check_status(void)
+{
+ int i = inb(HD_STATUS);
+
+ if (!OK_STATUS(i)) {
+ dump_status("check_status", i);
+ bad_rw_intr();
+ }
+}
+
+static int controller_busy(void)
+{
+ int retries = 100000;
+ unsigned char status;
+
+ do {
+ status = inb(HD_STATUS);
+ } while ((status & BUSY_STAT) && --retries);
+ return status;
+}
+
+static int status_ok(void)
+{
+ unsigned char status = inb(HD_STATUS);
+
+ if (status & BUSY_STAT)
+ return 1; /* Ancient, but does it make sense??? */
+ if (status & WRERR_STAT)
+ return 0;
+ if (!(status & READY_STAT))
+ return 0;
+ if (!(status & SEEK_STAT))
+ return 0;
+ return 1;
+}
+
+static int controller_ready(unsigned int drive, unsigned int head)
+{
+ int retry = 100;
+
+ do {
+ if (controller_busy() & BUSY_STAT)
+ return 0;
+ outb(0xA0 | (drive<<4) | head, HD_CURRENT);
+ if (status_ok())
+ return 1;
+ } while (--retry);
+ return 0;
+}
+
+static void hd_out(unsigned int drive,unsigned int nsect,unsigned int sect,
+ unsigned int head,unsigned int cyl,unsigned int cmd,
+ void (*intr_addr)(void))
+{
+ unsigned short port;
+
+#if (HD_DELAY > 0)
+ while (read_timer() - last_req < HD_DELAY)
+ /* nothing */;
+#endif
+ if (reset)
+ return;
+ if (!controller_ready(drive, head)) {
+ reset = 1;
+ return;
+ }
+ SET_HANDLER(intr_addr);
+ outb(hd_info[drive].ctl,HD_CMD);
+ port=HD_DATA + 2;
+ outb(hd_info[drive].wpcom>>2, port); port += 2;
+ outb(nsect, port); port += 2;
+ outb(sect, port); port += 2;
+ outb(cyl, port); port += 2;
+ outb(cyl>>8, port); port += 2;
+ outb(0xA0|(drive<<4)|head, port); port += 2;
+ outb(cmd, port);
+}
+
+static void hd_request (void);
+
+static int drive_busy(void)
+{
+ unsigned int i;
+ unsigned char c;
+
+ for (i = 0; i < 500000 ; i++) {
+ c = inb(HD_STATUS);
+ if ((c & (BUSY_STAT | READY_STAT | SEEK_STAT)) == STAT_OK)
+ return 0;
+ }
+ dump_status("reset timed out", c);
+ return 1;
+}
+
+static void reset_controller(void)
+{
+ int i;
+
+ outb(4,HD_CMD);
+ for(i = 0; i < 1000; i++) barrier();
+ outb(hd_info[0].ctl & 0x0f,HD_CMD);
+ for(i = 0; i < 1000; i++) barrier();
+ if (drive_busy())
+ printk("hd: controller still busy\n");
+ else if ((hd_error = inb(HD_ERROR)) != 1)
+ printk("hd: controller reset failed: %02x\n",hd_error);
+}
+
+static void reset_hd(void)
+{
+ static int i;
+
+repeat:
+ if (reset) {
+ reset = 0;
+ i = -1;
+ reset_controller();
+ } else {
+ check_status();
+ if (reset)
+ goto repeat;
+ }
+ if (++i < NR_HD) {
+ special_op[i] = recalibrate[i] = 1;
+ hd_out(i,hd_info[i].sect,hd_info[i].sect,hd_info[i].head-1,
+ hd_info[i].cyl,WIN_SPECIFY,&reset_hd);
+ if (reset)
+ goto repeat;
+ } else
+ hd_request();
+}
+
+/*
+ * Ok, don't know what to do with the unexpected interrupts: on some machines
+ * doing a reset and a retry seems to result in an eternal loop. Right now I
+ * ignore it, and just set the timeout.
+ *
+ * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
+ * drive enters "idle", "standby", or "sleep" mode, so if the status looks
+ * "good", we just ignore the interrupt completely.
+ */
+void unexpected_hd_interrupt(void)
+{
+ unsigned int stat = inb(HD_STATUS);
+
+ if (stat & (BUSY_STAT|DRQ_STAT|ECC_STAT|ERR_STAT)) {
+ dump_status ("unexpected interrupt", stat);
+ SET_TIMER;
+ }
+}
+
+/*
+ * bad_rw_intr() now tries to be a bit smarter and does things
+ * according to the error returned by the controller.
+ * -Mika Liljeberg (liljeber@cs.Helsinki.FI)
+ */
+static void bad_rw_intr(void)
+{
+ int dev;
+
+ if (blk_queue_empty(QUEUE))
+ return;
+ dev = DEVICE_NR(CURRENT->rq_dev);
+ if (++CURRENT->errors >= MAX_ERRORS || (hd_error & BBD_ERR)) {
+ end_request(CURRENT, 0);
+ special_op[dev] = recalibrate[dev] = 1;
+ } else if (CURRENT->errors % RESET_FREQ == 0)
+ reset = 1;
+ else if ((hd_error & TRK0_ERR) || CURRENT->errors % RECAL_FREQ == 0)
+ special_op[dev] = recalibrate[dev] = 1;
+ /* Otherwise just retry */
+}
+
+static inline int wait_DRQ(void)
+{
+ int retries = 100000, stat;
+
+ while (--retries > 0)
+ if ((stat = inb(HD_STATUS)) & DRQ_STAT)
+ return 0;
+ dump_status("wait_DRQ", stat);
+ return -1;
+}
+
+static void read_intr(void)
+{
+ int i, retries = 100000;
+
+ do {
+ i = (unsigned) inb(HD_STATUS);
+ if (i & BUSY_STAT)
+ continue;
+ if (!OK_STATUS(i))
+ break;
+ if (i & DRQ_STAT)
+ goto ok_to_read;
+ } while (--retries > 0);
+ dump_status("read_intr", i);
+ bad_rw_intr();
+ hd_request();
+ return;
+ok_to_read:
+ insw(HD_DATA,CURRENT->buffer,256);
+ CURRENT->sector++;
+ CURRENT->buffer += 512;
+ CURRENT->errors = 0;
+ i = --CURRENT->nr_sectors;
+ --CURRENT->current_nr_sectors;
+#ifdef DEBUG
+ printk("hd%c: read: sector %ld, remaining = %ld, buffer=0x%08lx\n",
+ dev+'a', CURRENT->sector, CURRENT->nr_sectors,
+ (unsigned long) CURRENT->buffer+512);
+#endif
+ if (CURRENT->current_nr_sectors <= 0)
+ end_request(CURRENT, 1);
+ if (i > 0) {
+ SET_HANDLER(&read_intr);
+ return;
+ }
+ (void) inb(HD_STATUS);
+#if (HD_DELAY > 0)
+ last_req = read_timer();
+#endif
+ if (!blk_queue_empty(QUEUE))
+ hd_request();
+ return;
+}
+
+static void write_intr(void)
+{
+ int i;
+ int retries = 100000;
+
+ do {
+ i = (unsigned) inb(HD_STATUS);
+ if (i & BUSY_STAT)
+ continue;
+ if (!OK_STATUS(i))
+ break;
+ if ((CURRENT->nr_sectors <= 1) || (i & DRQ_STAT))
+ goto ok_to_write;
+ } while (--retries > 0);
+ dump_status("write_intr", i);
+ bad_rw_intr();
+ hd_request();
+ return;
+ok_to_write:
+ CURRENT->sector++;
+ i = --CURRENT->nr_sectors;
+ --CURRENT->current_nr_sectors;
+ CURRENT->buffer += 512;
+ if (!i || (CURRENT->bio && !SUBSECTOR(i)))
+ end_request(CURRENT, 1);
+ if (i > 0) {
+ SET_HANDLER(&write_intr);
+ outsw(HD_DATA,CURRENT->buffer,256);
+ local_irq_enable();
+ } else {
+#if (HD_DELAY > 0)
+ last_req = read_timer();
+#endif
+ hd_request();
+ }
+ return;
+}
+
+static void recal_intr(void)
+{
+ check_status();
+#if (HD_DELAY > 0)
+ last_req = read_timer();
+#endif
+ hd_request();
+}
+
+/*
+ * This is another of the error-routines I don't know what to do with. The
+ * best idea seems to just set reset, and start all over again.
+ */
+static void hd_times_out(unsigned long dummy)
+{
+ unsigned int dev;
+
+ do_hd = NULL;
+
+ if (blk_queue_empty(QUEUE))
+ return;
+
+ disable_irq(HD_IRQ);
+ local_irq_enable();
+ reset = 1;
+ dev = DEVICE_NR(CURRENT->rq_dev);
+ printk("hd%c: timeout\n", dev+'a');
+ if (++CURRENT->errors >= MAX_ERRORS) {
+#ifdef DEBUG
+ printk("hd%c: too many errors\n", dev+'a');
+#endif
+ end_request(CURRENT, 0);
+ }
+ local_irq_disable();
+ hd_request();
+ enable_irq(HD_IRQ);
+}
+
+int do_special_op (unsigned int dev)
+{
+ if (recalibrate[dev]) {
+ recalibrate[dev] = 0;
+ hd_out(dev,hd_info[dev].sect,0,0,0,WIN_RESTORE,&recal_intr);
+ return reset;
+ }
+ if (hd_info[dev].head > 16) {
+ printk ("hd%c: cannot handle device with more than 16 heads - giving up\n", dev+'a');
+ end_request(CURRENT, 0);
+ }
+ special_op[dev] = 0;
+ return 1;
+}
+
+/*
+ * The driver enables interrupts as much as possible. In order to do this,
+ * (a) the device-interrupt is disabled before entering hd_request(),
+ * and (b) the timeout-interrupt is disabled before the sti().
+ *
+ * Interrupts are still masked (by default) whenever we are exchanging
+ * data/cmds with a drive, because some drives seem to have very poor
+ * tolerance for latency during I/O. The IDE driver has support to unmask
+ * interrupts for non-broken hardware, so use that driver if required.
+ */
+static void hd_request(void)
+{
+ unsigned int dev, block, nsect, sec, track, head, cyl;
+
+ if (do_hd)
+ return;
+repeat:
+ del_timer(&device_timer);
+ local_irq_enable();
+
+ if (blk_queue_empty(QUEUE)) {
+ do_hd = NULL;
+ return;
+ }
+
+ if (reset) {
+ local_irq_disable();
+ reset_hd();
+ return;
+ }
+ dev = DEVICE_NR(CURRENT->rq_dev);
+ block = CURRENT->sector;
+ nsect = CURRENT->nr_sectors;
+ if (dev >= NR_HD) {
+ printk("hd: bad disk number: %d\n", dev);
+ end_request(CURRENT, 0);
+ goto repeat;
+ }
+ if (block >= get_capacity(hd_gendisk[dev]) ||
+ ((block+nsect) > get_capacity(hd_gendisk[dev]))) {
+ printk("%s: bad access: block=%d, count=%d\n",
+ hd_gendisk[dev]->disk_name, block, nsect);
+ end_request(CURRENT, 0);
+ goto repeat;
+ }
+
+ if (special_op[dev]) {
+ if (do_special_op(dev))
+ goto repeat;
+ return;
+ }
+ sec = block % hd_info[dev].sect + 1;
+ track = block / hd_info[dev].sect;
+ head = track % hd_info[dev].head;
+ cyl = track / hd_info[dev].head;
+#ifdef DEBUG
+ printk("hd%c: %sing: CHS=%d/%d/%d, sectors=%d, buffer=0x%08lx\n",
+ dev+'a', (CURRENT->cmd == READ)?"read":"writ",
+ cyl, head, sec, nsect, (unsigned long) CURRENT->buffer);
+#endif
+ if(CURRENT->flags & REQ_CMD) {
+ switch (rq_data_dir(CURRENT)) {
+ case READ:
+ hd_out(dev,nsect,sec,head,cyl,WIN_READ,&read_intr);
+ if (reset)
+ goto repeat;
+ break;
+ case WRITE:
+ hd_out(dev,nsect,sec,head,cyl,WIN_WRITE,&write_intr);
+ if (reset)
+ goto repeat;
+ if (wait_DRQ()) {
+ bad_rw_intr();
+ goto repeat;
+ }
+ outsw(HD_DATA,CURRENT->buffer,256);
+ break;
+ default:
+ printk("unknown hd-command\n");
+ end_request(CURRENT, 0);
+ break;
+ }
+ }
+}
+
+static void do_hd_request (request_queue_t * q)
+{
+ disable_irq(HD_IRQ);
+ hd_request();
+ enable_irq(HD_IRQ);
+}
+
+static int hd_ioctl(struct inode * inode, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct hd_geometry *loc = (struct hd_geometry *) arg;
+ int dev;
+
+ if ((!inode) || kdev_none(inode->i_rdev))
+ return -EINVAL;
+ dev = DEVICE_NR(inode->i_rdev);
+ if (dev >= NR_HD)
+ return -EINVAL;
+ switch (cmd) {
+ case HDIO_GETGEO:
+ {
+ struct hd_geometry g;
+ if (!loc) return -EINVAL;
+ g.heads = hd_info[dev].head;
+ g.sectors = hd_info[dev].sect;
+ g.cylinders = hd_info[dev].cyl;
+ g.start = get_start_sect(inode->i_bdev);
+ return copy_to_user(loc, &g, sizeof g) ? -EFAULT : 0;
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int hd_open(struct inode * inode, struct file * filp)
+{
+ int target = DEVICE_NR(inode->i_rdev);
+ if (target >= NR_HD)
+ return -ENODEV;
+ return 0;
+}
+
+/*
+ * Releasing a block device means we sync() it, so that it can safely
+ * be forgotten about...
+ */
+
+extern struct block_device_operations hd_fops;
+
+static void hd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ void (*handler)(void) = do_hd;
+
+ do_hd = NULL;
+ del_timer(&device_timer);
+ if (!handler)
+ handler = unexpected_hd_interrupt;
+ handler();
+ local_irq_enable();
+}
+
+static struct block_device_operations hd_fops = {
+ .open = hd_open,
+ .ioctl = hd_ioctl,
+};
+
+/*
+ * This is the hard disk IRQ description. The SA_INTERRUPT in sa_flags
+ * means we run the IRQ-handler with interrupts disabled: this is bad for
+ * interrupt latency, but anything else has led to problems on some
+ * machines.
+ *
+ * We enable interrupts in some of the routines after making sure it's
+ * safe.
+ */
+
+static int __init hd_init(void)
+{
+ int drive;
+ if (register_blkdev(MAJOR_NR,"hd",&hd_fops)) {
+ printk("hd: unable to get major %d for hard disk\n",MAJOR_NR);
+ return -1;
+ }
+ blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), do_hd_request, &hd_lock);
+ blk_queue_max_sectors(BLK_DEFAULT_QUEUE(MAJOR_NR), 255);
+ init_timer(&device_timer);
+ device_timer.function = hd_times_out;
+ blk_queue_hardsect_size(QUEUE, 512);
+
+#ifdef __i386__
+ if (!NR_HD) {
+ extern struct drive_info drive_info;
+ unsigned char *BIOS = (unsigned char *) &drive_info;
+ unsigned long flags;
+#ifndef CONFIG_PC9800
+ int cmos_disks;
+#endif
+
+ for (drive=0 ; drive<2 ; drive++) {
+ hd_info[drive].cyl = *(unsigned short *) BIOS;
+ hd_info[drive].head = *(3+BIOS);
+ hd_info[drive].sect = *(2+BIOS);
+ hd_info[drive].wpcom = 0;
+ hd_info[drive].ctl = *(3+BIOS) > 8 ? 8 : 0;
+ hd_info[drive].lzone = *(unsigned short *) BIOS;
+ if (hd_info[drive].cyl && NR_HD == drive)
+ NR_HD++;
+ BIOS += 6;
+ }
+
+ }
+#endif /* __i386__ */
+#ifdef __arm__
+ if (!NR_HD) {
+ /* We don't know anything about the drive. This means
+ * that you *MUST* specify the drive parameters to the
+ * kernel yourself.
+ */
+ printk("hd: no drives specified - use hd=cyl,head,sectors"
+ " on kernel command line\n");
+ }
+#endif
+ if (!NR_HD)
+ goto out;
+
+ for (drive=0 ; drive < NR_HD ; drive++) {
+ struct gendisk *disk = alloc_disk();
+ if (!disk)
+ goto Enomem;
+ disk->major = MAJOR_NR;
+ disk->first_minor = drive << 6;
+ disk->minor_shift = 6;
+ disk->fops = &hd_fops;
+ sprintf(disk->disk_name, "hd%c", 'a'+drive);
+ hd_gendisk[drive] = disk;
+ }
+ for (drive=0 ; drive < NR_HD ; drive++) {
+ sector_t size = hd_info[drive].head *
+ hd_info[drive].sect * hd_info[drive].cyl;
+ set_capacity(hd_gendisk[drive], size);
+ printk ("%s: %ldMB, CHS=%d/%d/%d\n",
+ hd_gendisk[drive]->disk_name,
+ size / 2048, hd_info[drive].cyl,
+ hd_info[drive].head, hd_info[drive].sect);
+ }
+
+ if (request_irq(HD_IRQ, hd_interrupt, SA_INTERRUPT, "hd", NULL)) {
+ printk("hd: unable to get IRQ%d for the hard disk driver\n",
+ HD_IRQ);
+ goto out1;
+ }
+
+ if (!request_region(HD_DATA, 2, "hd(data)")) {
+ printk(KERN_WARNING "hd: port 0x%x busy\n", HD_DATA);
+ NR_HD = 0;
+ free_irq(HD_IRQ, NULL);
+ return;
+ }
+
+ if (!request_region(HD_DATA + 2, -13, "hd"))
+ {
+ printk(KERN_WARNING "hd: port 0x%x busy\n", HD_DATA);
+ goto out2;
+ }
+
+ if (!request_region(HD_CMD, -3, "hd(cmd)"))
+ {
+ printk(KERN_WARNING "hd: port 0x%x busy\n", HD_CMD);
+ goto out3;
+ }
+
+ for(drive=0; drive < NR_HD; drive++) {
+ struct hd_i_struct *p = hd_info + drive;
+ set_capacity(hd_gendisk[drive], p->head * p->sect * p->cyl);
+ add_disk(hd_gendisk[drive]);
+ }
+ return 0;
+
+out3:
+ release_region(HD_DATA + 2, -13);
+out2:
+ release_region(HD_DATA, 2);
+ free_irq(HD_IRQ, NULL);
+out1:
+ for (drive = 0; drive < NR_HD; drive++)
+ put_disk(hd_gendisk[drive]);
+ NR_HD = 0;
+out:
+ del_timer(&device_timer);
+ unregister_blkdev(MAJOR_NR,"hd");
+ blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR));
+ return -1;
+Enomem:
+ while (drive--)
+ put_disk(hd_gendisk[drive]);
+ goto out;
+}
+
+static int parse_hd_setup (char *line) {
+ int ints[6];
+
+ (void) get_options(line, ARRAY_SIZE(ints), ints);
+ hd_setup(NULL, ints);
+
+ return 1;
+}
+__setup("hd=", parse_hd_setup);
+
+module_init(hd_init);
diff -urN linux/drivers/ide/legacy/pc9800.c linux98/drivers/ide/legacy/pc9800.c
--- linux/drivers/ide/legacy/pc9800.c Thu Jan 1 09:00:00 1970
+++ linux98/drivers/ide/legacy/pc9800.c Tue Oct 8 17:06:39 2002
@@ -0,0 +1,82 @@
+/*
+ * ide_pc9800.c
+ *
+ * Copyright (C) 1997-2000 Linux/98 project,
+ * Kyoto University Microcomputer Club.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/pc9800.h>
+
+#define PC9800_IDE_BANKSELECT 0x432
+
+#define DEBUG
+
+static void
+pc9800_select(ide_drive_t *drive)
+{
+#ifdef DEBUG
+ byte old;
+
+ /* Too noisy: */
+ /* printk(KERN_DEBUG "pc9800_select(%s)\n", drive->name); */
+
+ outb(0x80, PC9800_IDE_BANKSELECT);
+ old = inb(PC9800_IDE_BANKSELECT);
+ if (old != HWIF(drive)->index)
+ printk(KERN_DEBUG "ide-pc9800: switching bank #%d -> #%d\n",
+ old, HWIF(drive)->index);
+#endif
+ outb(HWIF(drive)->index, PC9800_IDE_BANKSELECT);
+}
+
+void __init
+ide_probe_for_pc9800(void)
+{
+ byte tmp;
+
+ if (!PC9800_9821_P() /* || !PC9821_IDEIF_DOUBLE_P() */)
+ return;
+
+ if (check_region(PC9800_IDE_BANKSELECT, 1)) {
+ printk(KERN_ERR
+ "ide: bank select port (%#x) is already occupied!\n",
+ PC9800_IDE_BANKSELECT);
+ return;
+ }
+
+ /* Do actual probing. */
+ if ((tmp = inb(PC9800_IDE_BANKSELECT)) == (byte) ~0
+ || (outb(tmp ^ 1, PC9800_IDE_BANKSELECT),
+ /* Next outb is dummy for reading status. */
+ outb(0x80, PC9800_IDE_BANKSELECT),
+ inb(PC9800_IDE_BANKSELECT) != (tmp ^ 1))) {
+ printk(KERN_INFO
+ "ide: pc9800 type bank selecting port not found\n");
+ return;
+ }
+ /* Restore original value, just in case. */
+ outb(tmp, PC9800_IDE_BANKSELECT);
+
+ request_region(PC9800_IDE_BANKSELECT, 1, "ide0/1 bank");
+
+ /* These ports are probably used by IDE I/F. */
+ request_region(0x430, 1, "ide");
+ request_region(0x435, 1, "ide");
+
+ if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET] == HD_DATA
+ && ide_hwifs[1].io_ports[IDE_DATA_OFFSET] == HD_DATA) {
+ ide_hwifs[0].chipset = ide_pc9800;
+ ide_hwifs[0].mate = &ide_hwifs[1];
+ ide_hwifs[0].selectproc = pc9800_select;
+ ide_hwifs[1].chipset = ide_pc9800;
+ ide_hwifs[1].mate = &ide_hwifs[0];
+ ide_hwifs[1].selectproc = pc9800_select;
+ }
+}
diff -urN linux/include/asm-i386/ide.h linux98/include/asm-i386/ide.h
--- linux/include/asm-i386/ide.h Sat Oct 12 13:21:31 2002
+++ linux98/include/asm-i386/ide.h Sun Oct 13 23:17:54 2002
@@ -26,6 +26,9 @@
static __inline__ int ide_default_irq(ide_ioreg_t base)
{
switch (base) {
+#ifdef CONFIG_PC9800
+ case 0x640: return 9;
+#endif /* CONFIG_PC9800 */
case 0x1f0: return 14;
case 0x170: return 15;
case 0x1e8: return 11;
@@ -39,7 +42,11 @@
static __inline__ ide_ioreg_t ide_default_io_base(int index)
{
+#ifndef CONFIG_PC9800
static unsigned long ata_io_base[MAX_HWIFS] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
+#else /* CONFIG_PC9800 */
+ static unsigned long ata_io_base[MAX_HWIFS] = { 0x640, 0x640, 0, 0, 0, 0 };
+#endif /* !CONFIG_PC9800 */
return ata_io_base[index];
}
@@ -48,13 +55,24 @@
{
ide_ioreg_t reg = data_port;
int i;
+#ifdef CONFIG_PC9800
+ ide_ioreg_t increment = data_port == 0x640 ? 2 : 1;
+#endif
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
hw->io_ports[i] = reg;
+#ifndef CONFIG_PC9800
reg += 1;
+#else
+ reg += increment;
+#endif
}
if (ctrl_port) {
hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+#ifdef CONFIG_PC9800
+ } else if (data_port == 0x640) {
+ hw->io_ports[IDE_CONTROL_OFFSET] = 0x74c;
+#endif
} else {
hw->io_ports[IDE_CONTROL_OFFSET] = hw->io_ports[IDE_DATA_OFFSET] + 0x206;
}
diff -urN linux/include/linux/hdreg.h linux98/include/linux/hdreg.h
--- linux/include/linux/hdreg.h Sat Oct 12 13:22:07 2002
+++ linux98/include/linux/hdreg.h Sat Oct 12 19:38:02 2002
@@ -5,11 +5,13 @@
* This file contains some defines for the AT-hd-controller.
* Various sources.
*/
+#include <linux/config.h>
/* ide.c has its own port definitions in "ide.h" */
#define HD_IRQ 14
+#ifndef CONFIG_PC9800
/* Hd controller regs. Ref: IBM AT Bios-listing */
#define HD_DATA 0x1f0 /* _CTL when writing */
#define HD_ERROR 0x1f1 /* see err-bits */
@@ -25,6 +27,23 @@
#define HD_CMD 0x3f6 /* used for resets */
#define HD_ALTSTATUS 0x3f6 /* same as HD_STATUS but doesn't clear irq */
+#else /* CONFIG_PC9800 */
+/* Hd controller regs. for NEC PC-9800 */
+#define HD_DATA 0x640 /* _CTL when writing */
+#define HD_ERROR 0x642 /* see err-bits */
+#define HD_NSECTOR 0x644 /* nr of sectors to read/write */
+#define HD_SECTOR 0x646 /* starting sector */
+#define HD_LCYL 0x648 /* starting cylinder */
+#define HD_HCYL 0x64a /* high byte of starting cyl */
+#define HD_CURRENT 0x64c /* 101dhhhh , d=drive, hhhh=head */
+#define HD_STATUS 0x64e /* see status-bits */
+#define HD_FEATURE HD_ERROR /* same io address, read=error, write=feature */
+#define HD_PRECOMP HD_FEATURE /* obsolete use of this port - predates IDE */
+#define HD_COMMAND HD_STATUS /* same io address, read=status, write=cmd */
+
+#define HD_CMD 0x74c /* used for resets */
+#define HD_ALTSTATUS 0x74c /* same as HD_STATUS but doesn't clear irq */
+#endif /* CONFIG_PC9800 */
/* remainder is shared between hd.c, ide.c, ide-cd.c, and the hdparm utility */
diff -urN linux/include/linux/ide.h linux98/include/linux/ide.h
--- linux/include/linux/ide.h Sat Oct 12 13:21:41 2002
+++ linux98/include/linux/ide.h Sat Oct 12 14:18:54 2002
@@ -286,7 +286,7 @@
ide_qd65xx, ide_umc8672, ide_ht6560b,
ide_pdc4030, ide_rz1000, ide_trm290,
ide_cmd646, ide_cy82c693, ide_4drives,
- ide_pmac, ide_etrax100, ide_acorn
+ ide_pmac, ide_etrax100, ide_acorn, ide_pc9800
} hwif_chipset_t;
typedef struct ide_io_ops_s {
-
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