patch-2.4.21 linux-2.4.21/drivers/ide/ide-iops.c

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diff -urN linux-2.4.20/drivers/ide/ide-iops.c linux-2.4.21/drivers/ide/ide-iops.c
@@ -0,0 +1,1339 @@
+/*
+ * linux/drivers/ide/ide-iops.c	Version 0.37	Mar 05, 2003
+ *
+ *  Copyright (C) 2000-2002	Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003		Red Hat <alan@redhat.com>
+ *
+ *
+ */
+
+#include <linux/config.h>
+#define __NO_VERSION__
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/bitops.h>
+
+/*
+ *	IDE operator we assign to an unplugged device so that
+ *	we don't trash new hardware assigned the same resources
+ */
+ 
+static u8 ide_unplugged_inb (unsigned long port)
+{
+	return 0xFF;
+}
+
+static u16 ide_unplugged_inw (unsigned long port)
+{
+	return 0xFFFF;
+}
+
+static void ide_unplugged_insw (unsigned long port, void *addr, u32 count)
+{
+}
+
+static u32 ide_unplugged_inl (unsigned long port)
+{
+	return 0xFFFFFFFF;
+}
+
+static void ide_unplugged_insl (unsigned long port, void *addr, u32 count)
+{
+}
+
+static void ide_unplugged_outb (u8 addr, unsigned long port)
+{
+}
+
+static void ide_unplugged_outbsync (ide_drive_t *drive, u8 addr, unsigned long port)
+{
+}
+
+static void ide_unplugged_outw (u16 addr, unsigned long port)
+{
+}
+
+static void ide_unplugged_outsw (unsigned long port, void *addr, u32 count)
+{
+}
+
+static void ide_unplugged_outl (u32 addr, unsigned long port)
+{
+}
+
+static void ide_unplugged_outsl (unsigned long port, void *addr, u32 count)
+{
+}
+
+void unplugged_hwif_iops (ide_hwif_t *hwif)
+{
+	hwif->OUTB	= ide_unplugged_outb;
+	hwif->OUTBSYNC	= ide_unplugged_outbsync;
+	hwif->OUTW	= ide_unplugged_outw;
+	hwif->OUTL	= ide_unplugged_outl;
+	hwif->OUTSW	= ide_unplugged_outsw;
+	hwif->OUTSL	= ide_unplugged_outsl;
+	hwif->INB	= ide_unplugged_inb;
+	hwif->INW	= ide_unplugged_inw;
+	hwif->INL	= ide_unplugged_inl;
+	hwif->INSW	= ide_unplugged_insw;
+	hwif->INSL	= ide_unplugged_insl;
+}
+
+EXPORT_SYMBOL(unplugged_hwif_iops);
+
+/*
+ *	Conventional PIO operations for ATA devices
+ */
+
+static u8 ide_inb (unsigned long port)
+{
+	return (u8) inb(port);
+}
+
+static u16 ide_inw (unsigned long port)
+{
+	return (u16) inw(port);
+}
+
+static void ide_insw (unsigned long port, void *addr, u32 count)
+{
+	return insw(port, addr, count);
+}
+
+static u32 ide_inl (unsigned long port)
+{
+	return (u32) inl(port);
+}
+
+static void ide_insl (unsigned long port, void *addr, u32 count)
+{
+	insl(port, addr, count);
+}
+
+static void ide_outb (u8 addr, unsigned long port)
+{
+	outb(addr, port);
+}
+
+static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port)
+{
+	outb(addr, port);
+}
+
+static void ide_outw (u16 addr, unsigned long port)
+{
+	outw(addr, port);
+}
+
+static void ide_outsw (unsigned long port, void *addr, u32 count)
+{
+	outsw(port, addr, count);
+}
+
+static void ide_outl (u32 addr, unsigned long port)
+{
+	outl(addr, port);
+}
+
+static void ide_outsl (unsigned long port, void *addr, u32 count)
+{
+	outsl(port, addr, count);
+}
+
+void default_hwif_iops (ide_hwif_t *hwif)
+{
+	hwif->OUTB	= ide_outb;
+	hwif->OUTBSYNC	= ide_outbsync;
+	hwif->OUTW	= ide_outw;
+	hwif->OUTL	= ide_outl;
+	hwif->OUTSW	= ide_outsw;
+	hwif->OUTSL	= ide_outsl;
+	hwif->INB	= ide_inb;
+	hwif->INW	= ide_inw;
+	hwif->INL	= ide_inl;
+	hwif->INSW	= ide_insw;
+	hwif->INSL	= ide_insl;
+}
+
+EXPORT_SYMBOL(default_hwif_iops);
+
+/*
+ *	MMIO operations, typically used for SATA controllers
+ */
+
+static u8 ide_mm_inb (unsigned long port)
+{
+	return (u8) readb(port);
+}
+
+static u16 ide_mm_inw (unsigned long port)
+{
+	return (u16) readw(port);
+}
+
+static void ide_mm_insw (unsigned long port, void *addr, u32 count)
+{
+	__ide_mm_insw(port, addr, count);
+}
+
+static u32 ide_mm_inl (unsigned long port)
+{
+	return (u32) readl(port);
+}
+
+static void ide_mm_insl (unsigned long port, void *addr, u32 count)
+{
+	__ide_mm_insl(port, addr, count);
+}
+
+static void ide_mm_outb (u8 value, unsigned long port)
+{
+	writeb(value, port);
+}
+
+static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
+{
+	writeb(value, port);	
+}
+
+static void ide_mm_outw (u16 value, unsigned long port)
+{
+	writew(value, port);
+}
+
+static void ide_mm_outsw (unsigned long port, void *addr, u32 count)
+{
+	__ide_mm_outsw(port, addr, count);
+}
+
+static void ide_mm_outl (u32 value, unsigned long port)
+{
+	writel(value, port);
+}
+
+static void ide_mm_outsl (unsigned long port, void *addr, u32 count)
+{
+	__ide_mm_outsl(port, addr, count);
+}
+
+void default_hwif_mmiops (ide_hwif_t *hwif)
+{
+	hwif->OUTB	= ide_mm_outb;
+	/* Most systems will need to override OUTBSYNC, alas however
+	   this one is controller specific! */
+	hwif->OUTBSYNC	= ide_mm_outbsync;
+	hwif->OUTW	= ide_mm_outw;
+	hwif->OUTL	= ide_mm_outl;
+	hwif->OUTSW	= ide_mm_outsw;
+	hwif->OUTSL	= ide_mm_outsl;
+	hwif->INB	= ide_mm_inb;
+	hwif->INW	= ide_mm_inw;
+	hwif->INL	= ide_mm_inl;
+	hwif->INSW	= ide_mm_insw;
+	hwif->INSL	= ide_mm_insl;
+}
+
+EXPORT_SYMBOL(default_hwif_mmiops);
+
+void default_hwif_transport (ide_hwif_t *hwif)
+{
+	hwif->ata_input_data		= ata_input_data;
+	hwif->ata_output_data		= ata_output_data;
+	hwif->atapi_input_bytes		= atapi_input_bytes;
+	hwif->atapi_output_bytes	= atapi_output_bytes;
+}
+
+EXPORT_SYMBOL(default_hwif_transport);
+
+u32 read_24 (ide_drive_t *drive)
+{
+	u8 hcyl = HWIF(drive)->INB(IDE_HCYL_REG);
+	u8 lcyl = HWIF(drive)->INB(IDE_LCYL_REG);
+	u8 sect = HWIF(drive)->INB(IDE_SECTOR_REG);
+	return (hcyl<<16)|(lcyl<<8)|sect;
+}
+
+EXPORT_SYMBOL(read_24);
+
+void SELECT_DRIVE (ide_drive_t *drive)
+{
+	if (HWIF(drive)->selectproc)
+		HWIF(drive)->selectproc(drive);
+	HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
+}
+
+EXPORT_SYMBOL(SELECT_DRIVE);
+
+void SELECT_INTERRUPT (ide_drive_t *drive)
+{
+	if (HWIF(drive)->intrproc)
+		HWIF(drive)->intrproc(drive);
+	else
+		HWIF(drive)->OUTB(drive->ctl|2, IDE_CONTROL_REG);
+}
+
+EXPORT_SYMBOL(SELECT_INTERRUPT);
+
+void SELECT_MASK (ide_drive_t *drive, int mask)
+{
+	if (HWIF(drive)->maskproc)
+		HWIF(drive)->maskproc(drive, mask);
+}
+
+EXPORT_SYMBOL(SELECT_MASK);
+
+void QUIRK_LIST (ide_drive_t *drive)
+{
+	if (HWIF(drive)->quirkproc)
+		drive->quirk_list = HWIF(drive)->quirkproc(drive);
+}
+
+EXPORT_SYMBOL(QUIRK_LIST);
+
+/*
+ * Some localbus EIDE interfaces require a special access sequence
+ * when using 32-bit I/O instructions to transfer data.  We call this
+ * the "vlb_sync" sequence, which consists of three successive reads
+ * of the sector count register location, with interrupts disabled
+ * to ensure that the reads all happen together.
+ */
+void ata_vlb_sync (ide_drive_t *drive, ide_ioreg_t port)
+{
+	(void) HWIF(drive)->INB(port);
+	(void) HWIF(drive)->INB(port);
+	(void) HWIF(drive)->INB(port);
+}
+
+EXPORT_SYMBOL(ata_vlb_sync);
+
+/*
+ * This is used for most PIO data transfers *from* the IDE interface
+ */
+void ata_input_data (ide_drive_t *drive, void *buffer, u32 wcount)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 io_32bit		= drive->io_32bit;
+
+	if (io_32bit) {
+		if (io_32bit & 2) {
+			unsigned long flags;
+			local_irq_save(flags);
+			ata_vlb_sync(drive, IDE_NSECTOR_REG);
+			hwif->INSL(IDE_DATA_REG, buffer, wcount);
+			local_irq_restore(flags);
+		} else
+			hwif->INSL(IDE_DATA_REG, buffer, wcount);
+	} else {
+		hwif->INSW(IDE_DATA_REG, buffer, wcount<<1);
+	}
+}
+
+EXPORT_SYMBOL(ata_input_data);
+
+/*
+ * This is used for most PIO data transfers *to* the IDE interface
+ */
+void ata_output_data (ide_drive_t *drive, void *buffer, u32 wcount)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 io_32bit		= drive->io_32bit;
+
+	if (io_32bit) {
+		if (io_32bit & 2) {
+			unsigned long flags;
+			local_irq_save(flags);
+			ata_vlb_sync(drive, IDE_NSECTOR_REG);
+			hwif->OUTSL(IDE_DATA_REG, buffer, wcount);
+			local_irq_restore(flags);
+		} else
+			hwif->OUTSL(IDE_DATA_REG, buffer, wcount);
+	} else {
+		hwif->OUTSW(IDE_DATA_REG, buffer, wcount<<1);
+	}
+}
+
+EXPORT_SYMBOL(ata_output_data);
+
+/*
+ * The following routines are mainly used by the ATAPI drivers.
+ *
+ * These routines will round up any request for an odd number of bytes,
+ * so if an odd bytecount is specified, be sure that there's at least one
+ * extra byte allocated for the buffer.
+ */
+
+void atapi_input_bytes (ide_drive_t *drive, void *buffer, u32 bytecount)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+
+	++bytecount;
+#if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
+	if (MACH_IS_ATARI || MACH_IS_Q40) {
+		/* Atari has a byte-swapped IDE interface */
+		insw_swapw(IDE_DATA_REG, buffer, bytecount / 2);
+		return;
+	}
+#endif /* CONFIG_ATARI || CONFIG_Q40 */
+	hwif->ata_input_data(drive, buffer, bytecount / 4);
+	if ((bytecount & 0x03) >= 2)
+		hwif->INSW(IDE_DATA_REG, ((u8 *)buffer)+(bytecount & ~0x03), 1);
+}
+
+EXPORT_SYMBOL(atapi_input_bytes);
+
+void atapi_output_bytes (ide_drive_t *drive, void *buffer, u32 bytecount)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+
+	++bytecount;
+#if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
+	if (MACH_IS_ATARI || MACH_IS_Q40) {
+		/* Atari has a byte-swapped IDE interface */
+		outsw_swapw(IDE_DATA_REG, buffer, bytecount / 2);
+		return;
+	}
+#endif /* CONFIG_ATARI || CONFIG_Q40 */
+	hwif->ata_output_data(drive, buffer, bytecount / 4);
+	if ((bytecount & 0x03) >= 2)
+		hwif->OUTSW(IDE_DATA_REG, ((u8*)buffer)+(bytecount & ~0x03), 1);
+}
+
+EXPORT_SYMBOL(atapi_output_bytes);
+
+/*
+ * Beginning of Taskfile OPCODE Library and feature sets.
+ */
+void ide_fix_driveid (struct hd_driveid *id)
+{
+#ifndef __LITTLE_ENDIAN
+# ifdef __BIG_ENDIAN
+	int i;
+	u16 *stringcast;
+
+#ifdef __mc68000__
+	if (!MACH_IS_AMIGA && !MACH_IS_MAC && !MACH_IS_Q40 && !MACH_IS_ATARI)
+		return;
+
+#ifdef M68K_IDE_SWAPW
+	if (M68K_IDE_SWAPW) {	/* fix bus byteorder first */
+		u_char *p = (u_char *)id;
+		u_char t;
+		for (i = 0; i < 512; i += 2) {
+			t = p[i];
+			p[i] = p[i+1];
+			p[i+1] = t;
+		}
+	}
+#endif
+#endif /* __mc68000__ */
+
+	id->config         = __le16_to_cpu(id->config);
+	id->cyls           = __le16_to_cpu(id->cyls);
+	id->reserved2      = __le16_to_cpu(id->reserved2);
+	id->heads          = __le16_to_cpu(id->heads);
+	id->track_bytes    = __le16_to_cpu(id->track_bytes);
+	id->sector_bytes   = __le16_to_cpu(id->sector_bytes);
+	id->sectors        = __le16_to_cpu(id->sectors);
+	id->vendor0        = __le16_to_cpu(id->vendor0);
+	id->vendor1        = __le16_to_cpu(id->vendor1);
+	id->vendor2        = __le16_to_cpu(id->vendor2);
+	stringcast = (u16 *)&id->serial_no[0];
+	for (i = 0; i < (20/2); i++)
+		stringcast[i] = __le16_to_cpu(stringcast[i]);
+	id->buf_type       = __le16_to_cpu(id->buf_type);
+	id->buf_size       = __le16_to_cpu(id->buf_size);
+	id->ecc_bytes      = __le16_to_cpu(id->ecc_bytes);
+	stringcast = (u16 *)&id->fw_rev[0];
+	for (i = 0; i < (8/2); i++)
+		stringcast[i] = __le16_to_cpu(stringcast[i]);
+	stringcast = (u16 *)&id->model[0];
+	for (i = 0; i < (40/2); i++)
+		stringcast[i] = __le16_to_cpu(stringcast[i]);
+	id->dword_io       = __le16_to_cpu(id->dword_io);
+	id->reserved50     = __le16_to_cpu(id->reserved50);
+	id->field_valid    = __le16_to_cpu(id->field_valid);
+	id->cur_cyls       = __le16_to_cpu(id->cur_cyls);
+	id->cur_heads      = __le16_to_cpu(id->cur_heads);
+	id->cur_sectors    = __le16_to_cpu(id->cur_sectors);
+	id->cur_capacity0  = __le16_to_cpu(id->cur_capacity0);
+	id->cur_capacity1  = __le16_to_cpu(id->cur_capacity1);
+	id->lba_capacity   = __le32_to_cpu(id->lba_capacity);
+	id->dma_1word      = __le16_to_cpu(id->dma_1word);
+	id->dma_mword      = __le16_to_cpu(id->dma_mword);
+	id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
+	id->eide_dma_min   = __le16_to_cpu(id->eide_dma_min);
+	id->eide_dma_time  = __le16_to_cpu(id->eide_dma_time);
+	id->eide_pio       = __le16_to_cpu(id->eide_pio);
+	id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
+	for (i = 0; i < 2; ++i)
+		id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
+	for (i = 0; i < 4; ++i)
+		id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
+	id->queue_depth    = __le16_to_cpu(id->queue_depth);
+	for (i = 0; i < 4; ++i)
+		id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
+	id->major_rev_num  = __le16_to_cpu(id->major_rev_num);
+	id->minor_rev_num  = __le16_to_cpu(id->minor_rev_num);
+	id->command_set_1  = __le16_to_cpu(id->command_set_1);
+	id->command_set_2  = __le16_to_cpu(id->command_set_2);
+	id->cfsse          = __le16_to_cpu(id->cfsse);
+	id->cfs_enable_1   = __le16_to_cpu(id->cfs_enable_1);
+	id->cfs_enable_2   = __le16_to_cpu(id->cfs_enable_2);
+	id->csf_default    = __le16_to_cpu(id->csf_default);
+	id->dma_ultra      = __le16_to_cpu(id->dma_ultra);
+	id->trseuc         = __le16_to_cpu(id->trseuc);
+	id->trsEuc         = __le16_to_cpu(id->trsEuc);
+	id->CurAPMvalues   = __le16_to_cpu(id->CurAPMvalues);
+	id->mprc           = __le16_to_cpu(id->mprc);
+	id->hw_config      = __le16_to_cpu(id->hw_config);
+	id->acoustic       = __le16_to_cpu(id->acoustic);
+	id->msrqs          = __le16_to_cpu(id->msrqs);
+	id->sxfert         = __le16_to_cpu(id->sxfert);
+	id->sal            = __le16_to_cpu(id->sal);
+	id->spg            = __le32_to_cpu(id->spg);
+	id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
+	for (i = 0; i < 22; i++)
+		id->words104_125[i]   = __le16_to_cpu(id->words104_125[i]);
+	id->last_lun       = __le16_to_cpu(id->last_lun);
+	id->word127        = __le16_to_cpu(id->word127);
+	id->dlf            = __le16_to_cpu(id->dlf);
+	id->csfo           = __le16_to_cpu(id->csfo);
+	for (i = 0; i < 26; i++)
+		id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
+	id->word156        = __le16_to_cpu(id->word156);
+	for (i = 0; i < 3; i++)
+		id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
+	id->cfa_power      = __le16_to_cpu(id->cfa_power);
+	for (i = 0; i < 14; i++)
+		id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
+	for (i = 0; i < 31; i++)
+		id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
+	for (i = 0; i < 48; i++)
+		id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
+	id->integrity_word  = __le16_to_cpu(id->integrity_word);
+# else
+#  error "Please fix <asm/byteorder.h>"
+# endif
+#endif
+}
+
+EXPORT_SYMBOL(ide_fix_driveid);
+
+void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
+{
+	u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
+
+	if (byteswap) {
+		/* convert from big-endian to host byte order */
+		for (p = end ; p != s;) {
+			unsigned short *pp = (unsigned short *) (p -= 2);
+			*pp = ntohs(*pp);
+		}
+	}
+	/* strip leading blanks */
+	while (s != end && *s == ' ')
+		++s;
+	/* compress internal blanks and strip trailing blanks */
+	while (s != end && *s) {
+		if (*s++ != ' ' || (s != end && *s && *s != ' '))
+			*p++ = *(s-1);
+	}
+	/* wipe out trailing garbage */
+	while (p != end)
+		*p++ = '\0';
+}
+
+EXPORT_SYMBOL(ide_fixstring);
+
+/*
+ * Needed for PCI irq sharing
+ */
+int drive_is_ready (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 stat			= 0;
+
+	if (drive->waiting_for_dma)
+		return hwif->ide_dma_test_irq(drive);
+
+#if 0
+	/* need to guarantee 400ns since last command was issued */
+	udelay(1);
+#endif
+
+#ifdef CONFIG_IDEPCI_SHARE_IRQ
+	/*
+	 * We do a passive status test under shared PCI interrupts on
+	 * cards that truly share the ATA side interrupt, but may also share
+	 * an interrupt with another pci card/device.  We make no assumptions
+	 * about possible isa-pnp and pci-pnp issues yet.
+	 */
+	if (IDE_CONTROL_REG)
+		stat = hwif->INB(IDE_ALTSTATUS_REG);
+	else
+#endif /* CONFIG_IDEPCI_SHARE_IRQ */
+		/* Note: this may clear a pending IRQ!! */
+		stat = hwif->INB(IDE_STATUS_REG);
+
+	if (stat & BUSY_STAT)
+		/* drive busy:  definitely not interrupting */
+		return 0;
+
+	/* drive ready: *might* be interrupting */
+	return 1;
+}
+
+EXPORT_SYMBOL(drive_is_ready);
+
+/*
+ * Global for All, and taken from ide-pmac.c. Can be called
+ * with spinlock held & IRQs disabled, so don't schedule !
+ */
+int wait_for_ready (ide_drive_t *drive, int timeout)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 stat			= 0;
+
+	while(--timeout) {
+		stat = hwif->INB(IDE_STATUS_REG);
+		if (!(stat & BUSY_STAT)) {
+			if (drive->ready_stat == 0)
+				break;
+			else if ((stat & drive->ready_stat)||(stat & ERR_STAT))
+				break;
+		}
+		mdelay(1);
+	}
+	if ((stat & ERR_STAT) || timeout <= 0) {
+		if (stat & ERR_STAT) {
+			printk(KERN_ERR "%s: wait_for_ready, "
+				"error status: %x\n", drive->name, stat);
+		}
+		return 1;
+	}
+	return 0;
+}
+
+EXPORT_SYMBOL(wait_for_ready);
+
+/*
+ * This routine busy-waits for the drive status to be not "busy".
+ * It then checks the status for all of the "good" bits and none
+ * of the "bad" bits, and if all is okay it returns 0.  All other
+ * cases return 1 after invoking ide_error() -- caller should just return.
+ *
+ * This routine should get fixed to not hog the cpu during extra long waits..
+ * That could be done by busy-waiting for the first jiffy or two, and then
+ * setting a timer to wake up at half second intervals thereafter,
+ * until timeout is achieved, before timing out.
+ */
+int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+	u8 stat;
+	int i;
+	unsigned long flags;
+ 
+	/* bail early if we've exceeded max_failures */
+	if (drive->max_failures && (drive->failures > drive->max_failures)) {
+		*startstop = ide_stopped;
+		return 1;
+	}
+
+	udelay(1);	/* spec allows drive 400ns to assert "BUSY" */
+	if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+		local_irq_set(flags);
+		timeout += jiffies;
+		while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+			if (time_after(jiffies, timeout)) {
+				local_irq_restore(flags);
+				*startstop = DRIVER(drive)->error(drive, "status timeout", stat);
+				return 1;
+			}
+		}
+		local_irq_restore(flags);
+	}
+	/*
+	 * Allow status to settle, then read it again.
+	 * A few rare drives vastly violate the 400ns spec here,
+	 * so we'll wait up to 10usec for a "good" status
+	 * rather than expensively fail things immediately.
+	 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
+	 */
+	for (i = 0; i < 10; i++) {
+		udelay(1);
+		if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad))
+			return 0;
+	}
+	*startstop = DRIVER(drive)->error(drive, "status error", stat);
+	return 1;
+}
+
+EXPORT_SYMBOL(ide_wait_stat);
+
+/*
+ *  All hosts that use the 80c ribbon must use!
+ *  The name is derived from upper byte of word 93 and the 80c ribbon.
+ */
+u8 eighty_ninty_three (ide_drive_t *drive)
+{
+#if 0
+	if (!HWIF(drive)->udma_four)
+		return 0;
+
+	if (drive->id->major_rev_num) {
+		int hssbd = 0;
+		int i;
+		/*
+		 * Determime highest Supported SPEC
+		 */
+		for (i=1; i<=15; i++)
+			if (drive->id->major_rev_num & (1<<i))
+				hssbd++;
+
+		switch (hssbd) {
+			case 7:
+			case 6:
+			case 5:
+		/* ATA-4 and older do not support above Ultra 33 */
+			default:
+				return 0;
+		}
+	}
+
+	return ((u8) (
+#ifndef CONFIG_IDEDMA_IVB
+		(drive->id->hw_config & 0x4000) &&
+#endif /* CONFIG_IDEDMA_IVB */
+		 (drive->id->hw_config & 0x6000)) ? 1 : 0);
+
+#else
+
+	return ((u8) ((HWIF(drive)->udma_four) &&
+#ifndef CONFIG_IDEDMA_IVB
+			(drive->id->hw_config & 0x4000) &&
+#endif /* CONFIG_IDEDMA_IVB */
+			(drive->id->hw_config & 0x6000)) ? 1 : 0);
+#endif
+}
+
+EXPORT_SYMBOL(eighty_ninty_three);
+
+int ide_ata66_check (ide_drive_t *drive, ide_task_t *args)
+{
+	if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) &&
+	    (args->tfRegister[IDE_SECTOR_OFFSET] > XFER_UDMA_2) &&
+	    (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER)) {
+#ifndef CONFIG_IDEDMA_IVB
+		if ((drive->id->hw_config & 0x6000) == 0) {
+#else /* !CONFIG_IDEDMA_IVB */
+		if (((drive->id->hw_config & 0x2000) == 0) ||
+		    ((drive->id->hw_config & 0x4000) == 0)) {
+#endif /* CONFIG_IDEDMA_IVB */
+			printk("%s: Speed warnings UDMA 3/4/5 is not "
+				"functional.\n", drive->name);
+			return 1;
+		}
+		if (!HWIF(drive)->udma_four) {
+			printk("%s: Speed warnings UDMA 3/4/5 is not "
+				"functional.\n",
+				HWIF(drive)->name);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+EXPORT_SYMBOL(ide_ata66_check);
+
+/*
+ * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER.
+ * 1 : Safe to update drive->id DMA registers.
+ * 0 : OOPs not allowed.
+ */
+int set_transfer (ide_drive_t *drive, ide_task_t *args)
+{
+	if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) &&
+	    (args->tfRegister[IDE_SECTOR_OFFSET] >= XFER_SW_DMA_0) &&
+	    (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER) &&
+	    (drive->id->dma_ultra ||
+	     drive->id->dma_mword ||
+	     drive->id->dma_1word))
+		return 1;
+
+	return 0;
+}
+
+EXPORT_SYMBOL(set_transfer);
+
+u8 ide_auto_reduce_xfer (ide_drive_t *drive)
+{
+	if (!drive->crc_count)
+		return drive->current_speed;
+	drive->crc_count = 0;
+
+	switch(drive->current_speed) {
+		case XFER_UDMA_7:	return XFER_UDMA_6;
+		case XFER_UDMA_6:	return XFER_UDMA_5;
+		case XFER_UDMA_5:	return XFER_UDMA_4;
+		case XFER_UDMA_4:	return XFER_UDMA_3;
+		case XFER_UDMA_3:	return XFER_UDMA_2;
+		case XFER_UDMA_2:	return XFER_UDMA_1;
+		case XFER_UDMA_1:	return XFER_UDMA_0;
+			/*
+			 * OOPS we do not goto non Ultra DMA modes
+			 * without iCRC's available we force
+			 * the system to PIO and make the user
+			 * invoke the ATA-1 ATA-2 DMA modes.
+			 */
+		case XFER_UDMA_0:
+		default:		return XFER_PIO_4;
+	}
+}
+
+EXPORT_SYMBOL(ide_auto_reduce_xfer);
+
+/*
+ * Update the 
+ */
+int ide_driveid_update (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct hd_driveid *id;
+#if 0
+	id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
+	if (!id)
+		return 0;
+
+	taskfile_lib_get_identify(drive, (char *)&id);
+
+	ide_fix_driveid(id);
+	if (id) {
+		drive->id->dma_ultra = id->dma_ultra;
+		drive->id->dma_mword = id->dma_mword;
+		drive->id->dma_1word = id->dma_1word;
+		/* anything more ? */
+		kfree(id);
+	}
+	return 1;
+#else
+	/*
+	 * Re-read drive->id for possible DMA mode
+	 * change (copied from ide-probe.c)
+	 */
+	unsigned long timeout, flags;
+
+	SELECT_MASK(drive, 1);
+	if (IDE_CONTROL_REG)
+		hwif->OUTB(drive->ctl,IDE_CONTROL_REG);
+	ide_delay_50ms();
+	hwif->OUTB(WIN_IDENTIFY, IDE_COMMAND_REG);
+	timeout = jiffies + WAIT_WORSTCASE;
+	do {
+		if (time_after(jiffies, timeout)) {
+			SELECT_MASK(drive, 0);
+			return 0;	/* drive timed-out */
+		}
+		ide_delay_50ms();	/* give drive a breather */
+	} while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT);
+	ide_delay_50ms();	/* wait for IRQ and DRQ_STAT */
+	if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) {
+		SELECT_MASK(drive, 0);
+		printk("%s: CHECK for good STATUS\n", drive->name);
+		return 0;
+	}
+	local_irq_save(flags);
+	SELECT_MASK(drive, 0);
+	id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
+	if (!id) {
+		local_irq_restore(flags);
+		return 0;
+	}
+	ata_input_data(drive, id, SECTOR_WORDS);
+	(void) hwif->INB(IDE_STATUS_REG);	/* clear drive IRQ */
+	local_irq_enable();
+	local_irq_restore(flags);
+	ide_fix_driveid(id);
+
+	drive->id->dma_ultra = id->dma_ultra;
+	drive->id->dma_mword = id->dma_mword;
+	drive->id->dma_1word = id->dma_1word;
+	/* anything more ? */
+	kfree(id);
+
+	return 1;
+#endif
+}
+
+EXPORT_SYMBOL(ide_driveid_update);
+
+/*
+ * Similar to ide_wait_stat(), except it never calls ide_error internally.
+ * This is a kludge to handle the new ide_config_drive_speed() function,
+ * and should not otherwise be used anywhere.  Eventually, the tuneproc's
+ * should be updated to return ide_startstop_t, in which case we can get
+ * rid of this abomination again.  :)   -ml
+ *
+ * It is gone..........
+ *
+ * const char *msg == consider adding for verbose errors.
+ */
+int ide_config_drive_speed (ide_drive_t *drive, u8 speed)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	int	i, error	= 1;
+	u8 stat;
+
+//	while (HWGROUP(drive)->busy)
+//		ide_delay_50ms();
+
+#if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
+	hwif->ide_dma_host_off(drive);
+#endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
+
+	/*
+	 * Don't use ide_wait_cmd here - it will
+	 * attempt to set_geometry and recalibrate,
+	 * but for some reason these don't work at
+	 * this point (lost interrupt).
+	 */
+        /*
+         * Select the drive, and issue the SETFEATURES command
+         */
+	disable_irq_nosync(hwif->irq);
+	udelay(1);
+	SELECT_DRIVE(drive);
+	SELECT_MASK(drive, 0);
+	udelay(1);
+	if (IDE_CONTROL_REG)
+		hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG);
+	hwif->OUTB(speed, IDE_NSECTOR_REG);
+	hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG);
+	hwif->OUTB(WIN_SETFEATURES, IDE_COMMAND_REG);
+	if ((IDE_CONTROL_REG) && (drive->quirk_list == 2))
+		hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
+	udelay(1);
+	/*
+	 * Wait for drive to become non-BUSY
+	 */
+	if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+		unsigned long flags, timeout;
+		local_irq_set(flags);
+		timeout = jiffies + WAIT_CMD;
+		while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+			if (time_after(jiffies, timeout))
+				break;
+		}
+		local_irq_restore(flags);
+	}
+
+	/*
+	 * Allow status to settle, then read it again.
+	 * A few rare drives vastly violate the 400ns spec here,
+	 * so we'll wait up to 10usec for a "good" status
+	 * rather than expensively fail things immediately.
+	 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
+	 */
+	for (i = 0; i < 10; i++) {
+		udelay(1);
+		if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), DRIVE_READY, BUSY_STAT|DRQ_STAT|ERR_STAT)) {
+			error = 0;
+			break;
+		}
+	}
+
+	SELECT_MASK(drive, 0);
+
+	enable_irq(hwif->irq);
+
+	if (error) {
+		(void) ide_dump_status(drive, "set_drive_speed_status", stat);
+		return error;
+	}
+
+	drive->id->dma_ultra &= ~0xFF00;
+	drive->id->dma_mword &= ~0x0F00;
+	drive->id->dma_1word &= ~0x0F00;
+
+#if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
+	if (speed >= XFER_SW_DMA_0)
+		hwif->ide_dma_host_on(drive);
+	else
+		hwif->ide_dma_off_quietly(drive);
+#endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
+
+	switch(speed) {
+		case XFER_UDMA_7:   drive->id->dma_ultra |= 0x8080; break;
+		case XFER_UDMA_6:   drive->id->dma_ultra |= 0x4040; break;
+		case XFER_UDMA_5:   drive->id->dma_ultra |= 0x2020; break;
+		case XFER_UDMA_4:   drive->id->dma_ultra |= 0x1010; break;
+		case XFER_UDMA_3:   drive->id->dma_ultra |= 0x0808; break;
+		case XFER_UDMA_2:   drive->id->dma_ultra |= 0x0404; break;
+		case XFER_UDMA_1:   drive->id->dma_ultra |= 0x0202; break;
+		case XFER_UDMA_0:   drive->id->dma_ultra |= 0x0101; break;
+		case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
+		case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
+		case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
+		case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
+		case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
+		case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
+		default: break;
+	}
+	if (!drive->init_speed)
+		drive->init_speed = speed;
+	drive->current_speed = speed;
+	return error;
+}
+
+EXPORT_SYMBOL(ide_config_drive_speed);
+
+
+/*
+ * This should get invoked any time we exit the driver to
+ * wait for an interrupt response from a drive.  handler() points
+ * at the appropriate code to handle the next interrupt, and a
+ * timer is started to prevent us from waiting forever in case
+ * something goes wrong (see the ide_timer_expiry() handler later on).
+ *
+ * See also ide_execute_command
+ */
+void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
+		      unsigned int timeout, ide_expiry_t *expiry)
+{
+	ide_hwgroup_t *hwgroup = HWGROUP(drive);
+
+	if (hwgroup->handler != NULL) {
+		printk(KERN_CRIT "%s: ide_set_handler: handler not null; "
+			"old=%p, new=%p\n",
+			drive->name, hwgroup->handler, handler);
+		BUG();
+	}
+	hwgroup->handler	= handler;
+	hwgroup->expiry		= expiry;
+	hwgroup->timer.expires	= jiffies + timeout;
+	add_timer(&hwgroup->timer);
+}
+
+EXPORT_SYMBOL(__ide_set_handler);
+
+void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
+		      unsigned int timeout, ide_expiry_t *expiry)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&io_request_lock, flags);
+	__ide_set_handler(drive, handler, timeout, expiry);
+	spin_unlock_irqrestore(&io_request_lock, flags);
+}
+
+EXPORT_SYMBOL(ide_set_handler);
+
+/**
+ *	ide_execute_command	-	execute an IDE command
+ *	@drive: IDE drive to issue the command against
+ *	@command: command byte to write
+ *	@handler: handler for next phase
+ *	@timeout: timeout for command
+ *	@expiry:  handler to run on timeout
+ *
+ *	Helper function to issue an IDE command. This handles the
+ *	atomicity requirements, command timing and ensures that the 
+ *	handler and IRQ setup do not race. All IDE command kick off
+ *	should go via this function or do equivalent locking.
+ */
+ 
+void ide_execute_command(ide_drive_t *drive, task_ioreg_t cmd, ide_handler_t *handler, unsigned timeout, ide_expiry_t *expiry)
+{
+	unsigned long flags;
+	ide_hwgroup_t *hwgroup = HWGROUP(drive);
+	ide_hwif_t *hwif = HWIF(drive);
+	
+	spin_lock_irqsave(&io_request_lock, flags);
+	
+	if(hwgroup->handler)
+		BUG();
+	hwgroup->handler	= handler;
+	hwgroup->expiry		= expiry;
+	hwgroup->timer.expires	= jiffies + timeout;
+	add_timer(&hwgroup->timer);
+	hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG);
+	/* Drive takes 400nS to respond, we must avoid the IRQ being
+	   serviced before that. 
+	   
+	   FIXME: we could skip this delay with care on non shared
+	   devices 
+	   
+	   For DMA transfers highpoint have a neat trick we could
+	   use. When they take an IRQ they check STS but also that
+	   the DMA count is not zero (see hpt's own driver)
+	*/
+	ndelay(400);
+	spin_unlock_irqrestore(&io_request_lock, flags);
+}
+
+EXPORT_SYMBOL(ide_execute_command);
+
+/* needed below */
+static ide_startstop_t do_reset1 (ide_drive_t *, int);
+
+/*
+ * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
+ * during an atapi drive reset operation. If the drive has not yet responded,
+ * and we have not yet hit our maximum waiting time, then the timer is restarted
+ * for another 50ms.
+ */
+static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
+{
+	ide_hwgroup_t *hwgroup	= HWGROUP(drive);
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 stat;
+
+	SELECT_DRIVE(drive);
+	udelay (10);
+
+	if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+		printk("%s: ATAPI reset complete\n", drive->name);
+	} else {
+		if (time_before(jiffies, hwgroup->poll_timeout)) {
+			if (HWGROUP(drive)->handler != NULL)
+				BUG();
+			ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
+			/* continue polling */
+			return ide_started;
+		}
+		/* end of polling */
+		hwgroup->poll_timeout = 0;
+		printk("%s: ATAPI reset timed-out, status=0x%02x\n",
+				drive->name, stat);
+		/* do it the old fashioned way */
+		return do_reset1(drive, 1);
+	}
+	/* done polling */
+	hwgroup->poll_timeout = 0;
+	return ide_stopped;
+}
+
+/*
+ * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
+ * during an ide reset operation. If the drives have not yet responded,
+ * and we have not yet hit our maximum waiting time, then the timer is restarted
+ * for another 50ms.
+ */
+static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
+{
+	ide_hwgroup_t *hwgroup	= HWGROUP(drive);
+	ide_hwif_t *hwif	= HWIF(drive);
+	u8 tmp;
+
+	if (hwif->reset_poll != NULL) {
+		if (hwif->reset_poll(drive)) {
+			printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
+				hwif->name, drive->name);
+			return ide_stopped;
+		}
+	}
+
+	if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+		if (time_before(jiffies, hwgroup->poll_timeout)) {
+			if (HWGROUP(drive)->handler != NULL)
+				BUG();
+			ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
+			/* continue polling */
+			return ide_started;
+		}
+		printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
+		drive->failures++;
+	} else  {
+		printk("%s: reset: ", hwif->name);
+		if ((tmp = hwif->INB(IDE_ERROR_REG)) == 1) {
+			printk("success\n");
+			drive->failures = 0;
+		} else {
+			drive->failures++;
+#if FANCY_STATUS_DUMPS
+			printk("master: ");
+			switch (tmp & 0x7f) {
+				case 1: printk("passed");
+					break;
+				case 2: printk("formatter device error");
+					break;
+				case 3: printk("sector buffer error");
+					break;
+				case 4: printk("ECC circuitry error");
+					break;
+				case 5: printk("controlling MPU error");
+					break;
+				default:printk("error (0x%02x?)", tmp);
+			}
+			if (tmp & 0x80)
+				printk("; slave: failed");
+			printk("\n");
+#else
+			printk("failed\n");
+#endif /* FANCY_STATUS_DUMPS */
+		}
+	}
+	hwgroup->poll_timeout = 0;	/* done polling */
+	return ide_stopped;
+}
+
+void check_dma_crc (ide_drive_t *drive)
+{
+	if (drive->crc_count) {
+		(void) HWIF(drive)->ide_dma_off_quietly(drive);
+		ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive));
+		if (drive->current_speed >= XFER_SW_DMA_0)
+			(void) HWIF(drive)->ide_dma_on(drive);
+	} else {
+		(void) HWIF(drive)->ide_dma_off(drive);
+	}
+}
+
+void pre_reset (ide_drive_t *drive)
+{
+	DRIVER(drive)->pre_reset(drive);
+
+	if (!drive->keep_settings) {
+		if (drive->using_dma) {
+			check_dma_crc(drive);
+		} else {
+			drive->unmask = 0;
+			drive->io_32bit = 0;
+		}
+		return;
+	}
+	if (drive->using_dma)
+		check_dma_crc(drive);
+
+	if (HWIF(drive)->pre_reset != NULL)
+		HWIF(drive)->pre_reset(drive);
+
+}
+
+/*
+ * do_reset1() attempts to recover a confused drive by resetting it.
+ * Unfortunately, resetting a disk drive actually resets all devices on
+ * the same interface, so it can really be thought of as resetting the
+ * interface rather than resetting the drive.
+ *
+ * ATAPI devices have their own reset mechanism which allows them to be
+ * individually reset without clobbering other devices on the same interface.
+ *
+ * Unfortunately, the IDE interface does not generate an interrupt to let
+ * us know when the reset operation has finished, so we must poll for this.
+ * Equally poor, though, is the fact that this may a very long time to complete,
+ * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
+ * we set a timer to poll at 50ms intervals.
+ */
+
+static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
+{
+	unsigned int unit;
+	unsigned long flags;
+	ide_hwif_t *hwif;
+	ide_hwgroup_t *hwgroup;
+	
+	spin_lock_irqsave(&io_request_lock, flags);
+	
+	hwgroup = HWGROUP(drive);
+	hwif = HWIF(drive);
+	
+	/* We must not reset with running handlers */
+	if(hwgroup->handler != NULL)
+		BUG();
+
+	/* For an ATAPI device, first try an ATAPI SRST. */
+	if (drive->media != ide_disk && !do_not_try_atapi) {
+		pre_reset(drive);
+		SELECT_DRIVE(drive);
+		udelay (20);
+		hwif->OUTB(WIN_SRST, IDE_COMMAND_REG);
+		hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
+		__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
+		spin_unlock_irqrestore(&io_request_lock, flags);
+		return ide_started;
+	}
+
+	/*
+	 * First, reset any device state data we were maintaining
+	 * for any of the drives on this interface.
+	 */
+	for (unit = 0; unit < MAX_DRIVES; ++unit)
+		pre_reset(&hwif->drives[unit]);
+
+#if OK_TO_RESET_CONTROLLER
+	if (!IDE_CONTROL_REG) {
+		spin_unlock_irqrestore(&io_request_lock, flags);
+		return ide_stopped;
+	}
+
+	/*
+	 * Note that we also set nIEN while resetting the device,
+	 * to mask unwanted interrupts from the interface during the reset.
+	 * However, due to the design of PC hardware, this will cause an
+	 * immediate interrupt due to the edge transition it produces.
+	 * This single interrupt gives us a "fast poll" for drives that
+	 * recover from reset very quickly, saving us the first 50ms wait time.
+	 */
+	/* set SRST and nIEN */
+	hwif->OUTBSYNC(drive, drive->ctl|6,IDE_CONTROL_REG);
+	/* more than enough time */
+	udelay(10);
+	if (drive->quirk_list == 2) {
+		/* clear SRST and nIEN */
+		hwif->OUTBSYNC(drive, drive->ctl, IDE_CONTROL_REG);
+	} else {
+		/* clear SRST, leave nIEN */
+		hwif->OUTBSYNC(drive, drive->ctl|2, IDE_CONTROL_REG);
+	}
+	/* more than enough time */
+	udelay(10);
+	
+	hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
+	__ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
+	/*
+	 * Some weird controller like resetting themselves to a strange
+	 * state when the disks are reset this way. At least, the Winbond
+	 * 553 documentation says that
+	 */
+	if (hwif->resetproc != NULL) {
+		hwif->resetproc(drive);
+	}
+
+#endif	/* OK_TO_RESET_CONTROLLER */
+	spin_unlock_irqrestore(&io_request_lock, flags);
+	return ide_started;
+}
+
+/*
+ * ide_do_reset() is the entry point to the drive/interface reset code.
+ *
+ * Caller must not hold the io_request lock.
+ */
+ 
+ide_startstop_t ide_do_reset (ide_drive_t *drive)
+{
+	return do_reset1(drive, 0);
+}
+
+EXPORT_SYMBOL(ide_do_reset);
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)