Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2269 insertions, 0 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
new file mode 100644
index 00000000000..973dec799b5
--- /dev/null
+++ b/drivers/ide/ide.c
@@ -0,0 +1,2269 @@
+/*
+ *  linux/drivers/ide/ide.c		Version 7.00beta2	Mar 05 2003
+ *
+ *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
+ */
+
+/*
+ *  Mostly written by Mark Lord  <mlord@pobox.com>
+ *                and Gadi Oxman <gadio@netvision.net.il>
+ *                and Andre Hedrick <andre@linux-ide.org>
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ * This is the multiple IDE interface driver, as evolved from hd.c.
+ * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
+ *   (usually 14 & 15).
+ * There can be up to two drives per interface, as per the ATA-2 spec.
+ *
+ * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
+ * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
+ * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
+ * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
+ * ...
+ *
+ *  From hd.c:
+ *  |
+ *  | It traverses the request-list, using interrupts to jump between functions.
+ *  | As nearly all functions can be called within interrupts, we may not sleep.
+ *  | Special care is recommended.  Have Fun!
+ *  |
+ *  | 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.
+ *  |
+ *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
+ *  |
+ *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
+ *  | and general streamlining by Mark Lord (mlord@pobox.com).
+ *
+ *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
+ *
+ *	Mark Lord	(mlord@pobox.com)		(IDE Perf.Pkg)
+ *	Delman Lee	(delman@ieee.org)		("Mr. atdisk2")
+ *	Scott Snyder	(snyder@fnald0.fnal.gov)	(ATAPI IDE cd-rom)
+ *
+ *  This was a rewrite of just about everything from hd.c, though some original
+ *  code is still sprinkled about.  Think of it as a major evolution, with
+ *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
+ *
+ *  Version 1.0 ALPHA	initial code, primary i/f working okay
+ *  Version 1.3 BETA	dual i/f on shared irq tested & working!
+ *  Version 1.4 BETA	added auto probing for irq(s)
+ *  Version 1.5 BETA	added ALPHA (untested) support for IDE cd-roms,
+ *  ...
+ * Version 5.50		allow values as small as 20 for idebus=
+ * Version 5.51		force non io_32bit in drive_cmd_intr()
+ *			change delay_10ms() to delay_50ms() to fix problems
+ * Version 5.52		fix incorrect invalidation of removable devices
+ *			add "hdx=slow" command line option
+ * Version 5.60		start to modularize the driver; the disk and ATAPI
+ *			 drivers can be compiled as loadable modules.
+ *			move IDE probe code to ide-probe.c
+ *			move IDE disk code to ide-disk.c
+ *			add support for generic IDE device subdrivers
+ *			add m68k code from Geert Uytterhoeven
+ *			probe all interfaces by default
+ *			add ioctl to (re)probe an interface
+ * Version 6.00		use per device request queues
+ *			attempt to optimize shared hwgroup performance
+ *			add ioctl to manually adjust bandwidth algorithms
+ *			add kerneld support for the probe module
+ *			fix bug in ide_error()
+ *			fix bug in the first ide_get_lock() call for Atari
+ *			don't flush leftover data for ATAPI devices
+ * Version 6.01		clear hwgroup->active while the hwgroup sleeps
+ *			support HDIO_GETGEO for floppies
+ * Version 6.02		fix ide_ack_intr() call
+ *			check partition table on floppies
+ * Version 6.03		handle bad status bit sequencing in ide_wait_stat()
+ * Version 6.10		deleted old entries from this list of updates
+ *			replaced triton.c with ide-dma.c generic PCI DMA
+ *			added support for BIOS-enabled UltraDMA
+ *			rename all "promise" things to "pdc4030"
+ *			fix EZ-DRIVE handling on small disks
+ * Version 6.11		fix probe error in ide_scan_devices()
+ *			fix ancient "jiffies" polling bugs
+ *			mask all hwgroup interrupts on each irq entry
+ * Version 6.12		integrate ioctl and proc interfaces
+ *			fix parsing of "idex=" command line parameter
+ * Version 6.13		add support for ide4/ide5 courtesy rjones@orchestream.com
+ * Version 6.14		fixed IRQ sharing among PCI devices
+ * Version 6.15		added SMP awareness to IDE drivers
+ * Version 6.16		fixed various bugs; even more SMP friendly
+ * Version 6.17		fix for newest EZ-Drive problem
+ * Version 6.18		default unpartitioned-disk translation now "BIOS LBA"
+ * Version 6.19		Re-design for a UNIFORM driver for all platforms,
+ *			  model based on suggestions from Russell King and
+ *			  Geert Uytterhoeven
+ *			Promise DC4030VL now supported.
+ *			add support for ide6/ide7
+ *			delay_50ms() changed to ide_delay_50ms() and exported.
+ * Version 6.20		Added/Fixed Generic ATA-66 support and hwif detection.
+ *			Added hdx=flash to allow for second flash disk
+ *			  detection w/o the hang loop.
+ *			Added support for ide8/ide9
+ *			Added idex=ata66 for the quirky chipsets that are
+ *			  ATA-66 compliant, but have yet to determine a method
+ *			  of verification of the 80c cable presence.
+ *			  Specifically Promise's PDC20262 chipset.
+ * Version 6.21		Fixing/Fixed SMP spinlock issue with insight from an old
+ *			  hat that clarified original low level driver design.
+ * Version 6.30		Added SMP support; fixed multmode issues.  -ml
+ * Version 6.31		Debug Share INTR's and request queue streaming
+ *			Native ATA-100 support
+ *			Prep for Cascades Project
+ * Version 7.00alpha	First named revision of ide rearrange
+ *
+ *  Some additional driver compile-time options are in ./include/linux/ide.h
+ *
+ *  To do, in likely order of completion:
+ *	- modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
+ *
+ */
+
+#define	REVISION	"Revision: 7.00alpha2"
+#define	VERSION		"Id: ide.c 7.00a2 20020906"
+
+#undef REALLY_SLOW_IO		/* most systems can safely undef this */
+
+#define _IDE_C			/* Tell ide.h it's really us */
+
+#include <linux/config.h>
+#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/init.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/completion.h>
+#include <linux/reboot.h>
+#include <linux/cdrom.h>
+#include <linux/seq_file.h>
+#include <linux/device.h>
+#include <linux/bitops.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+/* default maximum number of failures */
+#define IDE_DEFAULT_MAX_FAILURES 	1
+
+static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
+					IDE2_MAJOR, IDE3_MAJOR,
+					IDE4_MAJOR, IDE5_MAJOR,
+					IDE6_MAJOR, IDE7_MAJOR,
+					IDE8_MAJOR, IDE9_MAJOR };
+
+static int idebus_parameter;	/* holds the "idebus=" parameter */
+static int system_bus_speed;	/* holds what we think is VESA/PCI bus speed */
+static int initializing;	/* set while initializing built-in drivers */
+
+DECLARE_MUTEX(ide_cfg_sem);
+ __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
+#endif
+
+#ifdef CONFIG_IDEDMA_AUTO
+int noautodma = 0;
+#else
+int noautodma = 1;
+#endif
+
+EXPORT_SYMBOL(noautodma);
+
+/*
+ * This is declared extern in ide.h, for access by other IDE modules:
+ */
+ide_hwif_t ide_hwifs[MAX_HWIFS];	/* master data repository */
+
+EXPORT_SYMBOL(ide_hwifs);
+
+static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives);
+
+/*
+ * Do not even *think* about calling this!
+ */
+static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
+{
+	unsigned int unit;
+
+	/* bulk initialize hwif & drive info with zeros */
+	memset(hwif, 0, sizeof(ide_hwif_t));
+
+	/* fill in any non-zero initial values */
+	hwif->index	= index;
+	hwif->major	= ide_hwif_to_major[index];
+
+	hwif->name[0]	= 'i';
+	hwif->name[1]	= 'd';
+	hwif->name[2]	= 'e';
+	hwif->name[3]	= '0' + index;
+
+	hwif->bus_state	= BUSSTATE_ON;
+
+	hwif->atapi_dma = 0;		/* disable all atapi dma */ 
+	hwif->ultra_mask = 0x80;	/* disable all ultra */
+	hwif->mwdma_mask = 0x80;	/* disable all mwdma */
+	hwif->swdma_mask = 0x80;	/* disable all swdma */
+
+	sema_init(&hwif->gendev_rel_sem, 0);
+
+	default_hwif_iops(hwif);
+	default_hwif_transport(hwif);
+	for (unit = 0; unit < MAX_DRIVES; ++unit) {
+		ide_drive_t *drive = &hwif->drives[unit];
+
+		drive->media			= ide_disk;
+		drive->select.all		= (unit<<4)|0xa0;
+		drive->hwif			= hwif;
+		drive->ctl			= 0x08;
+		drive->ready_stat		= READY_STAT;
+		drive->bad_wstat		= BAD_W_STAT;
+		drive->special.b.recalibrate	= 1;
+		drive->special.b.set_geometry	= 1;
+		drive->name[0]			= 'h';
+		drive->name[1]			= 'd';
+		drive->name[2]			= 'a' + (index * MAX_DRIVES) + unit;
+		drive->max_failures		= IDE_DEFAULT_MAX_FAILURES;
+		drive->using_dma		= 0;
+		drive->is_flash			= 0;
+		drive->vdma			= 0;
+		INIT_LIST_HEAD(&drive->list);
+		sema_init(&drive->gendev_rel_sem, 0);
+	}
+}
+
+static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
+{
+	hw_regs_t hw;
+
+	memset(&hw, 0, sizeof(hw_regs_t));
+
+	ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
+
+	memcpy(&hwif->hw, &hw, sizeof(hw));
+	memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
+
+	hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
+#ifdef CONFIG_BLK_DEV_HD
+	if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
+		hwif->noprobe = 1;	/* may be overridden by ide_setup() */
+#endif
+}
+
+extern void ide_arm_init(void);
+
+/*
+ * init_ide_data() sets reasonable default values into all fields
+ * of all instances of the hwifs and drives, but only on the first call.
+ * Subsequent calls have no effect (they don't wipe out anything).
+ *
+ * This routine is normally called at driver initialization time,
+ * but may also be called MUCH earlier during kernel "command-line"
+ * parameter processing.  As such, we cannot depend on any other parts
+ * of the kernel (such as memory allocation) to be functioning yet.
+ *
+ * This is too bad, as otherwise we could dynamically allocate the
+ * ide_drive_t structs as needed, rather than always consuming memory
+ * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
+ *
+ * FIXME: We should stuff the setup data into __init and copy the
+ * relevant hwifs/allocate them properly during boot.
+ */
+#define MAGIC_COOKIE 0x12345678
+static void __init init_ide_data (void)
+{
+	ide_hwif_t *hwif;
+	unsigned int index;
+	static unsigned long magic_cookie = MAGIC_COOKIE;
+
+	if (magic_cookie != MAGIC_COOKIE)
+		return;		/* already initialized */
+	magic_cookie = 0;
+
+	/* Initialise all interface structures */
+	for (index = 0; index < MAX_HWIFS; ++index) {
+		hwif = &ide_hwifs[index];
+		init_hwif_data(hwif, index);
+		init_hwif_default(hwif, index);
+#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
+		hwif->irq = hwif->hw.irq =
+			ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
+#endif
+	}
+#ifdef CONFIG_IDE_ARM
+	initializing = 1;
+	ide_arm_init();
+	initializing = 0;
+#endif
+}
+
+/**
+ *	ide_system_bus_speed	-	guess bus speed
+ *
+ *	ide_system_bus_speed() returns what we think is the system VESA/PCI
+ *	bus speed (in MHz). This is used for calculating interface PIO timings.
+ *	The default is 40 for known PCI systems, 50 otherwise.
+ *	The "idebus=xx" parameter can be used to override this value.
+ *	The actual value to be used is computed/displayed the first time
+ *	through. Drivers should only use this as a last resort.
+ *
+ *	Returns a guessed speed in MHz.
+ */
+
+static int ide_system_bus_speed(void)
+{
+#ifdef CONFIG_PCI
+	static struct pci_device_id pci_default[] = {
+		{ PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
+		{ }
+	};
+#else
+#define pci_default 0
+#endif /* CONFIG_PCI */
+
+	if (!system_bus_speed) {
+		if (idebus_parameter) {
+			/* user supplied value */
+			system_bus_speed = idebus_parameter;
+		} else if (pci_dev_present(pci_default)) {
+			/* safe default value for PCI */
+			system_bus_speed = 33;
+		} else {
+			/* safe default value for VESA and PCI */
+			system_bus_speed = 50;
+		}
+		printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
+			"for PIO modes%s\n", system_bus_speed,
+			idebus_parameter ? "" : "; override with idebus=xx");
+	}
+	return system_bus_speed;
+}
+
+/*
+ *	drives_lock protects the list of drives, drivers_lock the
+ *	list of drivers.  Currently nobody takes both at once.
+ */
+
+static DEFINE_SPINLOCK(drives_lock);
+static DEFINE_SPINLOCK(drivers_lock);
+static LIST_HEAD(drivers);
+
+/* Iterator for the driver list. */
+
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+	struct list_head *p;
+	loff_t l = *pos;
+	spin_lock(&drivers_lock);
+	list_for_each(p, &drivers)
+		if (!l--)
+			return list_entry(p, ide_driver_t, drivers);
+	return NULL;
+}
+
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	struct list_head *p = ((ide_driver_t *)v)->drivers.next;
+	(*pos)++;
+	return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers);
+}
+
+static void m_stop(struct seq_file *m, void *v)
+{
+	spin_unlock(&drivers_lock);
+}
+
+static int show_driver(struct seq_file *m, void *v)
+{
+	ide_driver_t *driver = v;
+	seq_printf(m, "%s version %s\n", driver->name, driver->version);
+	return 0;
+}
+
+struct seq_operations ide_drivers_op = {
+	.start	= m_start,
+	.next	= m_next,
+	.stop	= m_stop,
+	.show	= show_driver
+};
+
+#ifdef CONFIG_PROC_FS
+struct proc_dir_entry *proc_ide_root;
+#endif
+
+static struct resource* hwif_request_region(ide_hwif_t *hwif,
+					    unsigned long addr, int num)
+{
+	struct resource *res = request_region(addr, num, hwif->name);
+
+	if (!res)
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				hwif->name, addr, addr+num-1);
+	return res;
+}
+
+/**
+ *	ide_hwif_request_regions - request resources for IDE
+ *	@hwif: interface to use
+ *
+ *	Requests all the needed resources for an interface.
+ *	Right now core IDE code does this work which is deeply wrong.
+ *	MMIO leaves it to the controller driver,
+ *	PIO will migrate this way over time.
+ */
+
+int ide_hwif_request_regions(ide_hwif_t *hwif)
+{
+	unsigned long addr;
+	unsigned int i;
+
+	if (hwif->mmio == 2)
+		return 0;
+	BUG_ON(hwif->mmio == 1);
+	addr = hwif->io_ports[IDE_CONTROL_OFFSET];
+	if (addr && !hwif_request_region(hwif, addr, 1))
+		goto control_region_busy;
+	hwif->straight8 = 0;
+	addr = hwif->io_ports[IDE_DATA_OFFSET];
+	if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
+		if (!hwif_request_region(hwif, addr, 8))
+			goto data_region_busy;
+		hwif->straight8 = 1;
+		return 0;
+	}
+	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
+		addr = hwif->io_ports[i];
+		if (!hwif_request_region(hwif, addr, 1)) {
+			while (--i)
+				release_region(addr, 1);
+			goto data_region_busy;
+		}
+	}
+	return 0;
+
+data_region_busy:
+	addr = hwif->io_ports[IDE_CONTROL_OFFSET];
+	if (addr)
+		release_region(addr, 1);
+control_region_busy:
+	/* If any errors are return, we drop the hwif interface. */
+	return -EBUSY;
+}
+
+/**
+ *	ide_hwif_release_regions - free IDE resources
+ *
+ *	Note that we only release the standard ports,
+ *	and do not even try to handle any extra ports
+ *	allocated for weird IDE interface chipsets.
+ *
+ *	Note also that we don't yet handle mmio resources here. More
+ *	importantly our caller should be doing this so we need to 
+ *	restructure this as a helper function for drivers.
+ */
+
+void ide_hwif_release_regions(ide_hwif_t *hwif)
+{
+	u32 i = 0;
+
+	if (hwif->mmio == 2)
+		return;
+	if (hwif->io_ports[IDE_CONTROL_OFFSET])
+		release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
+	if (hwif->straight8) {
+		release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
+		return;
+	}
+	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
+		if (hwif->io_ports[i])
+			release_region(hwif->io_ports[i], 1);
+}
+
+/**
+ *	ide_hwif_restore	-	restore hwif to template
+ *	@hwif: hwif to update
+ *	@tmp_hwif: template
+ *
+ *	Restore hwif to a previous state by copying most settngs
+ *	from the template.
+ */
+
+static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
+{
+	hwif->hwgroup			= tmp_hwif->hwgroup;
+
+	hwif->gendev.parent		= tmp_hwif->gendev.parent;
+
+	hwif->proc			= tmp_hwif->proc;
+
+	hwif->major			= tmp_hwif->major;
+	hwif->straight8			= tmp_hwif->straight8;
+	hwif->bus_state			= tmp_hwif->bus_state;
+
+	hwif->atapi_dma			= tmp_hwif->atapi_dma;
+	hwif->ultra_mask		= tmp_hwif->ultra_mask;
+	hwif->mwdma_mask		= tmp_hwif->mwdma_mask;
+	hwif->swdma_mask		= tmp_hwif->swdma_mask;
+
+	hwif->chipset			= tmp_hwif->chipset;
+	hwif->hold			= tmp_hwif->hold;
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+	hwif->pci_dev			= tmp_hwif->pci_dev;
+	hwif->cds			= tmp_hwif->cds;
+#endif
+
+	hwif->tuneproc			= tmp_hwif->tuneproc;
+	hwif->speedproc			= tmp_hwif->speedproc;
+	hwif->selectproc		= tmp_hwif->selectproc;
+	hwif->reset_poll		= tmp_hwif->reset_poll;
+	hwif->pre_reset			= tmp_hwif->pre_reset;
+	hwif->resetproc			= tmp_hwif->resetproc;
+	hwif->intrproc			= tmp_hwif->intrproc;
+	hwif->maskproc			= tmp_hwif->maskproc;
+	hwif->quirkproc			= tmp_hwif->quirkproc;
+	hwif->busproc			= tmp_hwif->busproc;
+
+	hwif->ata_input_data		= tmp_hwif->ata_input_data;
+	hwif->ata_output_data		= tmp_hwif->ata_output_data;
+	hwif->atapi_input_bytes		= tmp_hwif->atapi_input_bytes;
+	hwif->atapi_output_bytes	= tmp_hwif->atapi_output_bytes;
+
+	hwif->dma_setup			= tmp_hwif->dma_setup;
+	hwif->dma_exec_cmd		= tmp_hwif->dma_exec_cmd;
+	hwif->dma_start			= tmp_hwif->dma_start;
+	hwif->ide_dma_end		= tmp_hwif->ide_dma_end;
+	hwif->ide_dma_check		= tmp_hwif->ide_dma_check;
+	hwif->ide_dma_on		= tmp_hwif->ide_dma_on;
+	hwif->ide_dma_off_quietly	= tmp_hwif->ide_dma_off_quietly;
+	hwif->ide_dma_test_irq		= tmp_hwif->ide_dma_test_irq;
+	hwif->ide_dma_host_on		= tmp_hwif->ide_dma_host_on;
+	hwif->ide_dma_host_off		= tmp_hwif->ide_dma_host_off;
+	hwif->ide_dma_lostirq		= tmp_hwif->ide_dma_lostirq;
+	hwif->ide_dma_timeout		= tmp_hwif->ide_dma_timeout;
+
+	hwif->OUTB			= tmp_hwif->OUTB;
+	hwif->OUTBSYNC			= tmp_hwif->OUTBSYNC;
+	hwif->OUTW			= tmp_hwif->OUTW;
+	hwif->OUTL			= tmp_hwif->OUTL;
+	hwif->OUTSW			= tmp_hwif->OUTSW;
+	hwif->OUTSL			= tmp_hwif->OUTSL;
+
+	hwif->INB			= tmp_hwif->INB;
+	hwif->INW			= tmp_hwif->INW;
+	hwif->INL			= tmp_hwif->INL;
+	hwif->INSW			= tmp_hwif->INSW;
+	hwif->INSL			= tmp_hwif->INSL;
+
+	hwif->sg_max_nents		= tmp_hwif->sg_max_nents;
+
+	hwif->mmio			= tmp_hwif->mmio;
+	hwif->rqsize			= tmp_hwif->rqsize;
+	hwif->no_lba48			= tmp_hwif->no_lba48;
+
+#ifndef CONFIG_BLK_DEV_IDECS
+	hwif->irq			= tmp_hwif->irq;
+#endif
+
+	hwif->dma_base			= tmp_hwif->dma_base;
+	hwif->dma_master		= tmp_hwif->dma_master;
+	hwif->dma_command		= tmp_hwif->dma_command;
+	hwif->dma_vendor1		= tmp_hwif->dma_vendor1;
+	hwif->dma_status		= tmp_hwif->dma_status;
+	hwif->dma_vendor3		= tmp_hwif->dma_vendor3;
+	hwif->dma_prdtable		= tmp_hwif->dma_prdtable;
+
+	hwif->dma_extra			= tmp_hwif->dma_extra;
+	hwif->config_data		= tmp_hwif->config_data;
+	hwif->select_data		= tmp_hwif->select_data;
+	hwif->autodma			= tmp_hwif->autodma;
+	hwif->udma_four			= tmp_hwif->udma_four;
+	hwif->no_dsc			= tmp_hwif->no_dsc;
+
+	hwif->hwif_data			= tmp_hwif->hwif_data;
+}
+
+/**
+ *	ide_unregister		-	free an ide interface
+ *	@index: index of interface (will change soon to a pointer)
+ *
+ *	Perform the final unregister of an IDE interface. At the moment
+ *	we don't refcount interfaces so this will also get split up.
+ *
+ *	Locking:
+ *	The caller must not hold the IDE locks
+ *	The drive present/vanishing is not yet properly locked
+ *	Take care with the callbacks. These have been split to avoid
+ *	deadlocking the IDE layer. The shutdown callback is called
+ *	before we take the lock and free resources. It is up to the
+ *	caller to be sure there is no pending I/O here, and that
+ *	the interfce will not be reopened (present/vanishing locking
+ *	isnt yet done btw). After we commit to the final kill we
+ *	call the cleanup callback with the ide locks held.
+ *
+ *	Unregister restores the hwif structures to the default state.
+ *	This is raving bonkers.
+ */
+
+void ide_unregister(unsigned int index)
+{
+	ide_drive_t *drive;
+	ide_hwif_t *hwif, *g;
+	static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
+	ide_hwgroup_t *hwgroup;
+	int irq_count = 0, unit, i;
+
+	BUG_ON(index >= MAX_HWIFS);
+
+	BUG_ON(in_interrupt());
+	BUG_ON(irqs_disabled());
+	down(&ide_cfg_sem);
+	spin_lock_irq(&ide_lock);
+	hwif = &ide_hwifs[index];
+	if (!hwif->present)
+		goto abort;
+	for (unit = 0; unit < MAX_DRIVES; ++unit) {
+		drive = &hwif->drives[unit];
+		if (!drive->present)
+			continue;
+		if (drive->usage || DRIVER(drive)->busy)
+			goto abort;
+		drive->dead = 1;
+	}
+	hwif->present = 0;
+
+	spin_unlock_irq(&ide_lock);
+
+	for (unit = 0; unit < MAX_DRIVES; ++unit) {
+		drive = &hwif->drives[unit];
+		if (!drive->present)
+			continue;
+		DRIVER(drive)->cleanup(drive);
+	}
+
+	destroy_proc_ide_interface(hwif);
+
+	hwgroup = hwif->hwgroup;
+	/*
+	 * free the irq if we were the only hwif using it
+	 */
+	g = hwgroup->hwif;
+	do {
+		if (g->irq == hwif->irq)
+			++irq_count;
+		g = g->next;
+	} while (g != hwgroup->hwif);
+	if (irq_count == 1)
+		free_irq(hwif->irq, hwgroup);
+
+	spin_lock_irq(&ide_lock);
+	/*
+	 * Note that we only release the standard ports,
+	 * and do not even try to handle any extra ports
+	 * allocated for weird IDE interface chipsets.
+	 */
+	ide_hwif_release_regions(hwif);
+
+	/*
+	 * Remove us from the hwgroup, and free
+	 * the hwgroup if we were the only member
+	 */
+	for (i = 0; i < MAX_DRIVES; ++i) {
+		drive = &hwif->drives[i];
+		if (drive->devfs_name[0] != '\0') {
+			devfs_remove(drive->devfs_name);
+			drive->devfs_name[0] = '\0';
+		}
+		if (!drive->present)
+			continue;
+		if (drive == drive->next) {
+			/* special case: last drive from hwgroup. */
+			BUG_ON(hwgroup->drive != drive);
+			hwgroup->drive = NULL;
+		} else {
+			ide_drive_t *walk;
+
+			walk = hwgroup->drive;
+			while (walk->next != drive)
+				walk = walk->next;
+			walk->next = drive->next;
+			if (hwgroup->drive == drive) {
+				hwgroup->drive = drive->next;
+				hwgroup->hwif = HWIF(hwgroup->drive);
+			}
+		}
+		BUG_ON(hwgroup->drive == drive);
+		if (drive->id != NULL) {
+			kfree(drive->id);
+			drive->id = NULL;
+		}
+		drive->present = 0;
+		/* Messed up locking ... */
+		spin_unlock_irq(&ide_lock);
+		blk_cleanup_queue(drive->queue);
+		device_unregister(&drive->gendev);
+		down(&drive->gendev_rel_sem);
+		spin_lock_irq(&ide_lock);
+		drive->queue = NULL;
+	}
+	if (hwif->next == hwif) {
+		BUG_ON(hwgroup->hwif != hwif);
+		kfree(hwgroup);
+	} else {
+		/* There is another interface in hwgroup.
+		 * Unlink us, and set hwgroup->drive and ->hwif to
+		 * something sane.
+		 */
+		g = hwgroup->hwif;
+		while (g->next != hwif)
+			g = g->next;
+		g->next = hwif->next;
+		if (hwgroup->hwif == hwif) {
+			/* Chose a random hwif for hwgroup->hwif.
+			 * It's guaranteed that there are no drives
+			 * left in the hwgroup.
+			 */
+			BUG_ON(hwgroup->drive != NULL);
+			hwgroup->hwif = g;
+		}
+		BUG_ON(hwgroup->hwif == hwif);
+	}
+
+	/* More messed up locking ... */
+	spin_unlock_irq(&ide_lock);
+	device_unregister(&hwif->gendev);
+	down(&hwif->gendev_rel_sem);
+
+	/*
+	 * Remove us from the kernel's knowledge
+	 */
+	blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
+	kfree(hwif->sg_table);
+	unregister_blkdev(hwif->major, hwif->name);
+	spin_lock_irq(&ide_lock);
+
+	if (hwif->dma_base) {
+		(void) ide_release_dma(hwif);
+
+		hwif->dma_base = 0;
+		hwif->dma_master = 0;
+		hwif->dma_command = 0;
+		hwif->dma_vendor1 = 0;
+		hwif->dma_status = 0;
+		hwif->dma_vendor3 = 0;
+		hwif->dma_prdtable = 0;
+	}
+
+	/* copy original settings */
+	tmp_hwif = *hwif;
+
+	/* restore hwif data to pristine status */
+	init_hwif_data(hwif, index);
+	init_hwif_default(hwif, index);
+
+	ide_hwif_restore(hwif, &tmp_hwif);
+
+abort:
+	spin_unlock_irq(&ide_lock);
+	up(&ide_cfg_sem);
+}
+
+EXPORT_SYMBOL(ide_unregister);
+
+
+/**
+ *	ide_setup_ports 	-	set up IDE interface ports
+ *	@hw: register descriptions
+ *	@base: base register
+ *	@offsets: table of register offsets
+ *	@ctrl: control register
+ *	@ack_irq: IRQ ack
+ *	@irq: interrupt lie
+ *
+ *	Setup hw_regs_t structure described by parameters.  You
+ *	may set up the hw structure yourself OR use this routine to
+ *	do it for you. This is basically a helper
+ *
+ */
+ 
+void ide_setup_ports (	hw_regs_t *hw,
+			unsigned long base, int *offsets,
+			unsigned long ctrl, unsigned long intr,
+			ide_ack_intr_t *ack_intr,
+/*
+ *			ide_io_ops_t *iops,
+ */
+			int irq)
+{
+	int i;
+
+	for (i = 0; i < IDE_NR_PORTS; i++) {
+		if (offsets[i] == -1) {
+			switch(i) {
+				case IDE_CONTROL_OFFSET:
+					hw->io_ports[i] = ctrl;
+					break;
+#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
+				case IDE_IRQ_OFFSET:
+					hw->io_ports[i] = intr;
+					break;
+#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
+				default:
+					hw->io_ports[i] = 0;
+					break;
+			}
+		} else {
+			hw->io_ports[i] = base + offsets[i];
+		}
+	}
+	hw->irq = irq;
+	hw->dma = NO_DMA;
+	hw->ack_intr = ack_intr;
+/*
+ *	hw->iops = iops;
+ */
+}
+
+/**
+ *	ide_register_hw_with_fixup	-	register IDE interface
+ *	@hw: hardware registers
+ *	@hwifp: pointer to returned hwif
+ *	@fixup: fixup function
+ *
+ *	Register an IDE interface, specifying exactly the registers etc.
+ *	Set init=1 iff calling before probes have taken place.
+ *
+ *	Returns -1 on error.
+ */
+
+int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
+{
+	int index, retry = 1;
+	ide_hwif_t *hwif;
+
+	do {
+		for (index = 0; index < MAX_HWIFS; ++index) {
+			hwif = &ide_hwifs[index];
+			if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
+				goto found;
+		}
+		for (index = 0; index < MAX_HWIFS; ++index) {
+			hwif = &ide_hwifs[index];
+			if (hwif->hold)
+				continue;
+			if ((!hwif->present && !hwif->mate && !initializing) ||
+			    (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
+				goto found;
+		}
+		for (index = 0; index < MAX_HWIFS; index++)
+			ide_unregister(index);
+	} while (retry--);
+	return -1;
+found:
+	if (hwif->present)
+		ide_unregister(index);
+	else if (!hwif->hold) {
+		init_hwif_data(hwif, index);
+		init_hwif_default(hwif, index);
+	}
+	if (hwif->present)
+		return -1;
+	memcpy(&hwif->hw, hw, sizeof(*hw));
+	memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
+	hwif->irq = hw->irq;
+	hwif->noprobe = 0;
+	hwif->chipset = hw->chipset;
+
+	if (!initializing) {
+		probe_hwif_init_with_fixup(hwif, fixup);
+		create_proc_ide_interfaces();
+	}
+
+	if (hwifp)
+		*hwifp = hwif;
+
+	return (initializing || hwif->present) ? index : -1;
+}
+
+EXPORT_SYMBOL(ide_register_hw_with_fixup);
+
+int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
+{
+	return ide_register_hw_with_fixup(hw, hwifp, NULL);
+}
+
+EXPORT_SYMBOL(ide_register_hw);
+
+/*
+ *	Locks for IDE setting functionality
+ */
+
+DECLARE_MUTEX(ide_setting_sem);
+
+/**
+ *	__ide_add_setting	-	add an ide setting option
+ *	@drive: drive to use
+ *	@name: setting name
+ *	@rw: true if the function is read write
+ *	@read_ioctl: function to call on read
+ *	@write_ioctl: function to call on write
+ *	@data_type: type of data
+ *	@min: range minimum
+ *	@max: range maximum
+ *	@mul_factor: multiplication scale
+ *	@div_factor: divison scale
+ *	@data: private data field
+ *	@set: setting
+ *	@auto_remove: setting auto removal flag
+ *
+ *	Removes the setting named from the device if it is present.
+ *	The function takes the settings_lock to protect against 
+ *	parallel changes. This function must not be called from IRQ
+ *	context. Returns 0 on success or -1 on failure.
+ *
+ *	BUGS: This code is seriously over-engineered. There is also
+ *	magic about how the driver specific features are setup. If
+ *	a driver is attached we assume the driver settings are auto
+ *	remove.
+ */
+
+static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
+{
+	ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
+
+	down(&ide_setting_sem);
+	while ((*p) && strcmp((*p)->name, name) < 0)
+		p = &((*p)->next);
+	if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
+		goto abort;
+	memset(setting, 0, sizeof(*setting));
+	if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
+		goto abort;
+	strcpy(setting->name, name);
+	setting->rw = rw;
+	setting->read_ioctl = read_ioctl;
+	setting->write_ioctl = write_ioctl;
+	setting->data_type = data_type;
+	setting->min = min;
+	setting->max = max;
+	setting->mul_factor = mul_factor;
+	setting->div_factor = div_factor;
+	setting->data = data;
+	setting->set = set;
+	
+	setting->next = *p;
+	if (auto_remove)
+		setting->auto_remove = 1;
+	*p = setting;
+	up(&ide_setting_sem);
+	return 0;
+abort:
+	up(&ide_setting_sem);
+	if (setting)
+		kfree(setting);
+	return -1;
+}
+
+int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
+{
+	return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
+}
+
+EXPORT_SYMBOL(ide_add_setting);
+
+/**
+ *	__ide_remove_setting	-	remove an ide setting option
+ *	@drive: drive to use
+ *	@name: setting name
+ *
+ *	Removes the setting named from the device if it is present.
+ *	The caller must hold the setting semaphore.
+ */
+ 
+static void __ide_remove_setting (ide_drive_t *drive, char *name)
+{
+	ide_settings_t **p, *setting;
+
+	p = (ide_settings_t **) &drive->settings;
+
+	while ((*p) && strcmp((*p)->name, name))
+		p = &((*p)->next);
+	if ((setting = (*p)) == NULL)
+		return;
+
+	(*p) = setting->next;
+	
+	kfree(setting->name);
+	kfree(setting);
+}
+
+/**
+ *	ide_find_setting_by_ioctl	-	find a drive specific ioctl
+ *	@drive: drive to scan
+ *	@cmd: ioctl command to handle
+ *
+ *	Scan's the device setting table for a matching entry and returns
+ *	this or NULL if no entry is found. The caller must hold the
+ *	setting semaphore
+ */
+ 
+static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
+{
+	ide_settings_t *setting = drive->settings;
+
+	while (setting) {
+		if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
+			break;
+		setting = setting->next;
+	}
+	
+	return setting;
+}
+
+/**
+ *	ide_find_setting_by_name	-	find a drive specific setting
+ *	@drive: drive to scan
+ *	@name: setting name
+ *
+ *	Scan's the device setting table for a matching entry and returns
+ *	this or NULL if no entry is found. The caller must hold the
+ *	setting semaphore
+ */
+ 
+ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
+{
+	ide_settings_t *setting = drive->settings;
+
+	while (setting) {
+		if (strcmp(setting->name, name) == 0)
+			break;
+		setting = setting->next;
+	}
+	return setting;
+}
+
+/**
+ *	auto_remove_settings	-	remove driver specific settings
+ *	@drive: drive
+ *
+ *	Automatically remove all the driver specific settings for this
+ *	drive. This function may sleep and must not be called from IRQ
+ *	context. The caller must hold ide_setting_sem.
+ */
+ 
+static void auto_remove_settings (ide_drive_t *drive)
+{
+	ide_settings_t *setting;
+repeat:
+	setting = drive->settings;
+	while (setting) {
+		if (setting->auto_remove) {
+			__ide_remove_setting(drive, setting->name);
+			goto repeat;
+		}
+		setting = setting->next;
+	}
+}
+
+/**
+ *	ide_read_setting	-	read an IDE setting
+ *	@drive: drive to read from
+ *	@setting: drive setting
+ *
+ *	Read a drive setting and return the value. The caller
+ *	must hold the ide_setting_sem when making this call.
+ *
+ *	BUGS: the data return and error are the same return value
+ *	so an error -EINVAL and true return of the same value cannot
+ *	be told apart
+ */
+ 
+int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
+{
+	int		val = -EINVAL;
+	unsigned long	flags;
+
+	if ((setting->rw & SETTING_READ)) {
+		spin_lock_irqsave(&ide_lock, flags);
+		switch(setting->data_type) {
+			case TYPE_BYTE:
+				val = *((u8 *) setting->data);
+				break;
+			case TYPE_SHORT:
+				val = *((u16 *) setting->data);
+				break;
+			case TYPE_INT:
+			case TYPE_INTA:
+				val = *((u32 *) setting->data);
+				break;
+		}
+		spin_unlock_irqrestore(&ide_lock, flags);
+	}
+	return val;
+}
+
+/**
+ *	ide_spin_wait_hwgroup	-	wait for group
+ *	@drive: drive in the group
+ *
+ *	Wait for an IDE device group to go non busy and then return
+ *	holding the ide_lock which guards the hwgroup->busy status
+ *	and right to use it.
+ */
+
+int ide_spin_wait_hwgroup (ide_drive_t *drive)
+{
+	ide_hwgroup_t *hwgroup = HWGROUP(drive);
+	unsigned long timeout = jiffies + (3 * HZ);
+
+	spin_lock_irq(&ide_lock);
+
+	while (hwgroup->busy) {
+		unsigned long lflags;
+		spin_unlock_irq(&ide_lock);
+		local_irq_set(lflags);
+		if (time_after(jiffies, timeout)) {
+			local_irq_restore(lflags);
+			printk(KERN_ERR "%s: channel busy\n", drive->name);
+			return -EBUSY;
+		}
+		local_irq_restore(lflags);
+		spin_lock_irq(&ide_lock);
+	}
+	return 0;
+}
+
+EXPORT_SYMBOL(ide_spin_wait_hwgroup);
+
+/**
+ *	ide_write_setting	-	read an IDE setting
+ *	@drive: drive to read from
+ *	@setting: drive setting
+ *	@val: value
+ *
+ *	Write a drive setting if it is possible. The caller
+ *	must hold the ide_setting_sem when making this call.
+ *
+ *	BUGS: the data return and error are the same return value
+ *	so an error -EINVAL and true return of the same value cannot
+ *	be told apart
+ *
+ *	FIXME:  This should be changed to enqueue a special request
+ *	to the driver to change settings, and then wait on a sema for completion.
+ *	The current scheme of polling is kludgy, though safe enough.
+ */
+
+int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
+{
+	int i;
+	u32 *p;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	if (!(setting->rw & SETTING_WRITE))
+		return -EPERM;
+	if (val < setting->min || val > setting->max)
+		return -EINVAL;
+	if (setting->set)
+		return setting->set(drive, val);
+	if (ide_spin_wait_hwgroup(drive))
+		return -EBUSY;
+	switch (setting->data_type) {
+		case TYPE_BYTE:
+			*((u8 *) setting->data) = val;
+			break;
+		case TYPE_SHORT:
+			*((u16 *) setting->data) = val;
+			break;
+		case TYPE_INT:
+			*((u32 *) setting->data) = val;
+			break;
+		case TYPE_INTA:
+			p = (u32 *) setting->data;
+			for (i = 0; i < 1 << PARTN_BITS; i++, p++)
+				*p = val;
+			break;
+	}
+	spin_unlock_irq(&ide_lock);
+	return 0;
+}
+
+static int set_io_32bit(ide_drive_t *drive, int arg)
+{
+	drive->io_32bit = arg;
+#ifdef CONFIG_BLK_DEV_DTC2278
+	if (HWIF(drive)->chipset == ide_dtc2278)
+		HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
+#endif /* CONFIG_BLK_DEV_DTC2278 */
+	return 0;
+}
+
+static int set_using_dma (ide_drive_t *drive, int arg)
+{
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	if (!drive->id || !(drive->id->capability & 1))
+		return -EPERM;
+	if (HWIF(drive)->ide_dma_check == NULL)
+		return -EPERM;
+	if (arg) {
+		if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
+		if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
+	} else {
+		if (__ide_dma_off(drive))
+			return -EIO;
+	}
+	return 0;
+#else
+	return -EPERM;
+#endif
+}
+
+static int set_pio_mode (ide_drive_t *drive, int arg)
+{
+	struct request rq;
+
+	if (!HWIF(drive)->tuneproc)
+		return -ENOSYS;
+	if (drive->special.b.set_tune)
+		return -EBUSY;
+	ide_init_drive_cmd(&rq);
+	drive->tune_req = (u8) arg;
+	drive->special.b.set_tune = 1;
+	(void) ide_do_drive_cmd(drive, &rq, ide_wait);
+	return 0;
+}
+
+static int set_xfer_rate (ide_drive_t *drive, int arg)
+{
+	int err = ide_wait_cmd(drive,
+			WIN_SETFEATURES, (u8) arg,
+			SETFEATURES_XFER, 0, NULL);
+
+	if (!err && arg) {
+		ide_set_xfer_rate(drive, (u8) arg);
+		ide_driveid_update(drive);
+	}
+	return err;
+}
+
+/**
+ *	ide_add_generic_settings	-	generic ide settings
+ *	@drive: drive being configured
+ *
+ *	Add the generic parts of the system settings to the /proc files and
+ *	ioctls for this IDE device. The caller must not be holding the
+ *	ide_setting_sem.
+ */
+
+void ide_add_generic_settings (ide_drive_t *drive)
+{
+/*
+ *			  drive		setting name		read/write access				read ioctl		write ioctl		data type	min	max				mul_factor	div_factor	data pointer			set function
+ */
+	__ide_add_setting(drive,	"io_32bit",		drive->no_io_32bit ? SETTING_READ : SETTING_RW,	HDIO_GET_32BIT,		HDIO_SET_32BIT,		TYPE_BYTE,	0,	1 + (SUPPORT_VLB_SYNC << 1),	1,		1,		&drive->io_32bit,		set_io_32bit,	0);
+	__ide_add_setting(drive,	"keepsettings",		SETTING_RW,					HDIO_GET_KEEPSETTINGS,	HDIO_SET_KEEPSETTINGS,	TYPE_BYTE,	0,	1,				1,		1,		&drive->keep_settings,		NULL,		0);
+	__ide_add_setting(drive,	"nice1",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	1,				1,		1,		&drive->nice1,			NULL,		0);
+	__ide_add_setting(drive,	"pio_mode",		SETTING_WRITE,					-1,			HDIO_SET_PIO_MODE,	TYPE_BYTE,	0,	255,				1,		1,		NULL,				set_pio_mode,	0);
+	__ide_add_setting(drive,	"unmaskirq",		drive->no_unmask ? SETTING_READ : SETTING_RW,	HDIO_GET_UNMASKINTR,	HDIO_SET_UNMASKINTR,	TYPE_BYTE,	0,	1,				1,		1,		&drive->unmask,			NULL,		0);
+	__ide_add_setting(drive,	"using_dma",		SETTING_RW,					HDIO_GET_DMA,		HDIO_SET_DMA,		TYPE_BYTE,	0,	1,				1,		1,		&drive->using_dma,		set_using_dma,	0);
+	__ide_add_setting(drive,	"init_speed",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	70,				1,		1,		&drive->init_speed,		NULL,		0);
+	__ide_add_setting(drive,	"current_speed",	SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	70,				1,		1,		&drive->current_speed,		set_xfer_rate,	0);
+	__ide_add_setting(drive,	"number",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	3,				1,		1,		&drive->dn,			NULL,		0);
+}
+
+/**
+ *	system_bus_clock	-	clock guess
+ *
+ *	External version of the bus clock guess used by very old IDE drivers
+ *	for things like VLB timings. Should not be used.
+ */
+
+int system_bus_clock (void)
+{
+	return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
+}
+
+EXPORT_SYMBOL(system_bus_clock);
+
+/*
+ *	Locking is badly broken here - since way back.  That sucker is
+ * root-only, but that's not an excuse...  The real question is what
+ * exclusion rules do we want here.
+ */
+int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
+{
+	if (!drive->present || drive->usage || drive->dead)
+		goto abort;
+	if (DRIVER(drive)->cleanup(drive))
+		goto abort;
+	strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
+	if (ata_attach(drive)) {
+		spin_lock(&drives_lock);
+		list_del_init(&drive->list);
+		spin_unlock(&drives_lock);
+		drive->driver_req[0] = 0;
+		ata_attach(drive);
+	} else {
+		drive->driver_req[0] = 0;
+	}
+	if (drive->driver && !strcmp(drive->driver->name, driver))
+		return 0;
+abort:
+	return 1;
+}
+
+/**
+ *	ata_attach		-	attach an ATA/ATAPI device
+ *	@drive: drive to attach
+ *
+ *	Takes a drive that is as yet not assigned to any midlayer IDE
+ *	driver (or is assigned to the default driver) and figures out
+ *	which driver would like to own it. If nobody claims the drive
+ *	then it is automatically attached to the default driver used for
+ *	unclaimed objects.
+ *
+ *	A return of zero indicates attachment to a driver, of one
+ *	attachment to the default driver.
+ *
+ *	Takes drivers_lock.
+ */
+
+int ata_attach(ide_drive_t *drive)
+{
+	struct list_head *p;
+	spin_lock(&drivers_lock);
+	list_for_each(p, &drivers) {
+		ide_driver_t *driver = list_entry(p, ide_driver_t, drivers);
+		if (!try_module_get(driver->owner))
+			continue;
+		spin_unlock(&drivers_lock);
+		if (driver->attach(drive) == 0) {
+			module_put(driver->owner);
+			drive->gendev.driver = &driver->gen_driver;
+			return 0;
+		}
+		spin_lock(&drivers_lock);
+		module_put(driver->owner);
+	}
+	drive->gendev.driver = NULL;
+	spin_unlock(&drivers_lock);
+	if (ide_register_subdriver(drive, NULL))
+		panic("ide: default attach failed");
+	return 1;
+}
+
+static int generic_ide_suspend(struct device *dev, pm_message_t state)
+{
+	ide_drive_t *drive = dev->driver_data;
+	struct request rq;
+	struct request_pm_state rqpm;
+	ide_task_t args;
+
+	memset(&rq, 0, sizeof(rq));
+	memset(&rqpm, 0, sizeof(rqpm));
+	memset(&args, 0, sizeof(args));
+	rq.flags = REQ_PM_SUSPEND;
+	rq.special = &args;
+	rq.pm = &rqpm;
+	rqpm.pm_step = ide_pm_state_start_suspend;
+	rqpm.pm_state = state;
+
+	return ide_do_drive_cmd(drive, &rq, ide_wait);
+}
+
+static int generic_ide_resume(struct device *dev)
+{
+	ide_drive_t *drive = dev->driver_data;
+	struct request rq;
+	struct request_pm_state rqpm;
+	ide_task_t args;
+
+	memset(&rq, 0, sizeof(rq));
+	memset(&rqpm, 0, sizeof(rqpm));
+	memset(&args, 0, sizeof(args));
+	rq.flags = REQ_PM_RESUME;
+	rq.special = &args;
+	rq.pm = &rqpm;
+	rqpm.pm_step = ide_pm_state_start_resume;
+	rqpm.pm_state = 0;
+
+	return ide_do_drive_cmd(drive, &rq, ide_head_wait);
+}
+
+int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
+			unsigned int cmd, unsigned long arg)
+{
+	ide_settings_t *setting;
+	ide_driver_t *drv;
+	int err = 0;
+	void __user *p = (void __user *)arg;
+
+	down(&ide_setting_sem);
+	if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
+		if (cmd == setting->read_ioctl) {
+			err = ide_read_setting(drive, setting);
+			up(&ide_setting_sem);
+			return err >= 0 ? put_user(err, (long __user *)arg) : err;
+		} else {
+			if (bdev != bdev->bd_contains)
+				err = -EINVAL;
+			else
+				err = ide_write_setting(drive, setting, arg);
+			up(&ide_setting_sem);
+			return err;
+		}
+	}
+	up(&ide_setting_sem);
+
+	switch (cmd) {
+		case HDIO_GETGEO:
+		{
+			struct hd_geometry geom;
+			if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
+			geom.heads = drive->bios_head;
+			geom.sectors = drive->bios_sect;
+			geom.cylinders = (u16)drive->bios_cyl; /* truncate */
+			geom.start = get_start_sect(bdev);
+			if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
+				return -EFAULT;
+			return 0;
+		}
+
+		case HDIO_OBSOLETE_IDENTITY:
+		case HDIO_GET_IDENTITY:
+			if (bdev != bdev->bd_contains)
+				return -EINVAL;
+			if (drive->id_read == 0)
+				return -ENOMSG;
+			if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
+				return -EFAULT;
+			return 0;
+
+		case HDIO_GET_NICE:
+			return put_user(drive->dsc_overlap	<<	IDE_NICE_DSC_OVERLAP	|
+					drive->atapi_overlap	<<	IDE_NICE_ATAPI_OVERLAP	|
+					drive->nice0		<< 	IDE_NICE_0		|
+					drive->nice1		<<	IDE_NICE_1		|
+					drive->nice2		<<	IDE_NICE_2,
+					(long __user *) arg);
+
+#ifdef CONFIG_IDE_TASK_IOCTL
+		case HDIO_DRIVE_TASKFILE:
+		        if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
+				return -EACCES;
+			switch(drive->media) {
+				case ide_disk:
+					return ide_taskfile_ioctl(drive, cmd, arg);
+				default:
+					return -ENOMSG;
+			}
+#endif /* CONFIG_IDE_TASK_IOCTL */
+
+		case HDIO_DRIVE_CMD:
+			if (!capable(CAP_SYS_RAWIO))
+				return -EACCES;
+			return ide_cmd_ioctl(drive, cmd, arg);
+
+		case HDIO_DRIVE_TASK:
+			if (!capable(CAP_SYS_RAWIO))
+				return -EACCES;
+			return ide_task_ioctl(drive, cmd, arg);
+
+		case HDIO_SCAN_HWIF:
+		{
+			hw_regs_t hw;
+			int args[3];
+			if (!capable(CAP_SYS_RAWIO)) return -EACCES;
+			if (copy_from_user(args, p, 3 * sizeof(int)))
+				return -EFAULT;
+			memset(&hw, 0, sizeof(hw));
+			ide_init_hwif_ports(&hw, (unsigned long) args[0],
+					    (unsigned long) args[1], NULL);
+			hw.irq = args[2];
+			if (ide_register_hw(&hw, NULL) == -1)
+				return -EIO;
+			return 0;
+		}
+	        case HDIO_UNREGISTER_HWIF:
+			if (!capable(CAP_SYS_RAWIO)) return -EACCES;
+			/* (arg > MAX_HWIFS) checked in function */
+			ide_unregister(arg);
+			return 0;
+		case HDIO_SET_NICE:
+			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
+			if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
+				return -EPERM;
+			drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
+			drv = *(ide_driver_t **)bdev->bd_disk->private_data;
+			if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
+				drive->dsc_overlap = 0;
+				return -EPERM;
+			}
+			drive->nice1 = (arg >> IDE_NICE_1) & 1;
+			return 0;
+		case HDIO_DRIVE_RESET:
+		{
+			unsigned long flags;
+			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
+			
+			/*
+			 *	Abort the current command on the
+			 *	group if there is one, taking
+			 *	care not to allow anything else
+			 *	to be queued and to die on the
+			 *	spot if we miss one somehow
+			 */
+
+			spin_lock_irqsave(&ide_lock, flags);
+
+			ide_abort(drive, "drive reset");
+
+			if(HWGROUP(drive)->handler)
+				BUG();
+				
+			/* Ensure nothing gets queued after we
+			   drop the lock. Reset will clear the busy */
+		   
+			HWGROUP(drive)->busy = 1;
+			spin_unlock_irqrestore(&ide_lock, flags);
+			(void) ide_do_reset(drive);
+
+			return 0;
+		}
+
+		case CDROMEJECT:
+		case CDROMCLOSETRAY:
+			return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
+
+		case HDIO_GET_BUSSTATE:
+			if (!capable(CAP_SYS_ADMIN))
+				return -EACCES;
+			if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
+				return -EFAULT;
+			return 0;
+
+		case HDIO_SET_BUSSTATE:
+			if (!capable(CAP_SYS_ADMIN))
+				return -EACCES;
+			if (HWIF(drive)->busproc)
+				return HWIF(drive)->busproc(drive, (int)arg);
+			return -EOPNOTSUPP;
+		default:
+			return -EINVAL;
+	}
+}
+
+EXPORT_SYMBOL(generic_ide_ioctl);
+
+/*
+ * stridx() returns the offset of c within s,
+ * or -1 if c is '\0' or not found within s.
+ */
+static int __init stridx (const char *s, char c)
+{
+	char *i = strchr(s, c);
+	return (i && c) ? i - s : -1;
+}
+
+/*
+ * match_parm() does parsing for ide_setup():
+ *
+ * 1. the first char of s must be '='.
+ * 2. if the remainder matches one of the supplied keywords,
+ *     the index (1 based) of the keyword is negated and returned.
+ * 3. if the remainder is a series of no more than max_vals numbers
+ *     separated by commas, the numbers are saved in vals[] and a
+ *     count of how many were saved is returned.  Base10 is assumed,
+ *     and base16 is allowed when prefixed with "0x".
+ * 4. otherwise, zero is returned.
+ */
+static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
+{
+	static const char *decimal = "0123456789";
+	static const char *hex = "0123456789abcdef";
+	int i, n;
+
+	if (*s++ == '=') {
+		/*
+		 * Try matching against the supplied keywords,
+		 * and return -(index+1) if we match one
+		 */
+		if (keywords != NULL) {
+			for (i = 0; *keywords != NULL; ++i) {
+				if (!strcmp(s, *keywords++))
+					return -(i+1);
+			}
+		}
+		/*
+		 * Look for a series of no more than "max_vals"
+		 * numeric values separated by commas, in base10,
+		 * or base16 when prefixed with "0x".
+		 * Return a count of how many were found.
+		 */
+		for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
+			vals[n] = i;
+			while ((i = stridx(decimal, *++s)) >= 0)
+				vals[n] = (vals[n] * 10) + i;
+			if (*s == 'x' && !vals[n]) {
+				while ((i = stridx(hex, *++s)) >= 0)
+					vals[n] = (vals[n] * 0x10) + i;
+			}
+			if (++n == max_vals)
+				break;
+			if (*s == ',' || *s == ';')
+				++s;
+		}
+		if (!*s)
+			return n;
+	}
+	return 0;	/* zero = nothing matched */
+}
+
+#ifdef CONFIG_BLK_DEV_ALI14XX
+static int __initdata probe_ali14xx;
+extern int ali14xx_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+static int __initdata probe_umc8672;
+extern int umc8672_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+static int __initdata probe_dtc2278;
+extern int dtc2278_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+static int __initdata probe_ht6560b;
+extern int ht6560b_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+static int __initdata probe_qd65xx;
+extern int qd65xx_init(void);
+#endif
+
+static int __initdata is_chipset_set[MAX_HWIFS];
+
+/*
+ * ide_setup() gets called VERY EARLY during initialization,
+ * to handle kernel "command line" strings beginning with "hdx=" or "ide".
+ *
+ * Remember to update Documentation/ide.txt if you change something here.
+ */
+static int __init ide_setup(char *s)
+{
+	int i, vals[3];
+	ide_hwif_t *hwif;
+	ide_drive_t *drive;
+	unsigned int hw, unit;
+	const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
+	const char max_hwif  = '0' + (MAX_HWIFS - 1);
+
+	
+	if (strncmp(s,"hd",2) == 0 && s[2] == '=')	/* hd= is for hd.c   */
+		return 0;				/* driver and not us */
+
+	if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
+		return 0;
+
+	printk(KERN_INFO "ide_setup: %s", s);
+	init_ide_data ();
+
+#ifdef CONFIG_BLK_DEV_IDEDOUBLER
+	if (!strcmp(s, "ide=doubler")) {
+		extern int ide_doubler;
+
+		printk(" : Enabled support for IDE doublers\n");
+		ide_doubler = 1;
+		return 1;
+	}
+#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
+
+	if (!strcmp(s, "ide=nodma")) {
+		printk(" : Prevented DMA\n");
+		noautodma = 1;
+		return 1;
+	}
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+	if (!strcmp(s, "ide=reverse")) {
+		ide_scan_direction = 1;
+		printk(" : Enabled support for IDE inverse scan order.\n");
+		return 1;
+	}
+#endif /* CONFIG_BLK_DEV_IDEPCI */
+
+	/*
+	 * Look for drive options:  "hdx="
+	 */
+	if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
+		const char *hd_words[] = {
+			"none", "noprobe", "nowerr", "cdrom", "serialize",
+			"autotune", "noautotune", "minus8", "swapdata", "bswap",
+			"minus11", "remap", "remap63", "scsi", NULL };
+		unit = s[2] - 'a';
+		hw   = unit / MAX_DRIVES;
+		unit = unit % MAX_DRIVES;
+		hwif = &ide_hwifs[hw];
+		drive = &hwif->drives[unit];
+		if (strncmp(s + 4, "ide-", 4) == 0) {
+			strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
+			goto done;
+		}
+		switch (match_parm(&s[3], hd_words, vals, 3)) {
+			case -1: /* "none" */
+			case -2: /* "noprobe" */
+				drive->noprobe = 1;
+				goto done;
+			case -3: /* "nowerr" */
+				drive->bad_wstat = BAD_R_STAT;
+				hwif->noprobe = 0;
+				goto done;
+			case -4: /* "cdrom" */
+				drive->present = 1;
+				drive->media = ide_cdrom;
+				/* an ATAPI device ignores DRDY */
+				drive->ready_stat = 0;
+				hwif->noprobe = 0;
+				goto done;
+			case -5: /* "serialize" */
+				printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
+				goto do_serialize;
+			case -6: /* "autotune" */
+				drive->autotune = IDE_TUNE_AUTO;
+				goto obsolete_option;
+			case -7: /* "noautotune" */
+				drive->autotune = IDE_TUNE_NOAUTO;
+				goto obsolete_option;
+			case -9: /* "swapdata" */
+			case -10: /* "bswap" */
+				drive->bswap = 1;
+				goto done;
+			case -12: /* "remap" */
+				drive->remap_0_to_1 = 1;
+				goto done;
+			case -13: /* "remap63" */
+				drive->sect0 = 63;
+				goto done;
+			case -14: /* "scsi" */
+				drive->scsi = 1;
+				goto done;
+			case 3: /* cyl,head,sect */
+				drive->media	= ide_disk;
+				drive->ready_stat = READY_STAT;
+				drive->cyl	= drive->bios_cyl  = vals[0];
+				drive->head	= drive->bios_head = vals[1];
+				drive->sect	= drive->bios_sect = vals[2];
+				drive->present	= 1;
+				drive->forced_geom = 1;
+				hwif->noprobe = 0;
+				goto done;
+			default:
+				goto bad_option;
+		}
+	}
+
+	if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
+		goto bad_option;
+	/*
+	 * Look for bus speed option:  "idebus="
+	 */
+	if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
+		if (match_parm(&s[6], NULL, vals, 1) != 1)
+			goto bad_option;
+		if (vals[0] >= 20 && vals[0] <= 66) {
+			idebus_parameter = vals[0];
+		} else
+			printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
+		goto done;
+	}
+	/*
+	 * Look for interface options:  "idex="
+	 */
+	if (s[3] >= '0' && s[3] <= max_hwif) {
+		/*
+		 * Be VERY CAREFUL changing this: note hardcoded indexes below
+		 * (-8, -9, -10) are reserved to ease the hardcoding.
+		 */
+		static const char *ide_words[] = {
+			"noprobe", "serialize", "autotune", "noautotune", 
+			"reset", "dma", "ata66", "minus8", "minus9",
+			"minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
+			"dtc2278", "umc8672", "ali14xx", NULL };
+		hw = s[3] - '0';
+		hwif = &ide_hwifs[hw];
+		i = match_parm(&s[4], ide_words, vals, 3);
+
+		/*
+		 * Cryptic check to ensure chipset not already set for hwif.
+		 * Note: we can't depend on hwif->chipset here.
+		 */
+		if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
+			/* chipset already specified */
+			if (is_chipset_set[hw])
+				goto bad_option;
+			if (i > -18 && i <= -11) {
+				/* these drivers are for "ide0=" only */
+				if (hw != 0)
+					goto bad_hwif;
+				/* chipset already specified for 2nd port */
+				if (is_chipset_set[hw+1])
+					goto bad_option;
+			}
+			is_chipset_set[hw] = 1;
+			printk("\n");
+		}
+
+		switch (i) {
+#ifdef CONFIG_BLK_DEV_ALI14XX
+			case -17: /* "ali14xx" */
+				probe_ali14xx = 1;
+				goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+			case -16: /* "umc8672" */
+				probe_umc8672 = 1;
+				goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+			case -15: /* "dtc2278" */
+				probe_dtc2278 = 1;
+				goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_CMD640
+			case -14: /* "cmd640_vlb" */
+			{
+				extern int cmd640_vlb; /* flag for cmd640.c */
+				cmd640_vlb = 1;
+				goto done;
+			}
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+			case -13: /* "ht6560b" */
+				probe_ht6560b = 1;
+				goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+			case -12: /* "qd65xx" */
+				probe_qd65xx = 1;
+				goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_4DRIVES
+			case -11: /* "four" drives on one set of ports */
+			{
+				ide_hwif_t *mate = &ide_hwifs[hw^1];
+				mate->drives[0].select.all ^= 0x20;
+				mate->drives[1].select.all ^= 0x20;
+				hwif->chipset = mate->chipset = ide_4drives;
+				mate->irq = hwif->irq;
+				memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
+				goto do_serialize;
+			}
+#endif /* CONFIG_BLK_DEV_4DRIVES */
+			case -10: /* minus10 */
+			case -9: /* minus9 */
+			case -8: /* minus8 */
+				goto bad_option;
+			case -7: /* ata66 */
+#ifdef CONFIG_BLK_DEV_IDEPCI
+				hwif->udma_four = 1;
+				goto obsolete_option;
+#else
+				goto bad_hwif;
+#endif
+			case -6: /* dma */
+				hwif->autodma = 1;
+				goto obsolete_option;
+			case -5: /* "reset" */
+				hwif->reset = 1;
+				goto obsolete_option;
+			case -4: /* "noautotune" */
+				hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
+				hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
+				goto obsolete_option;
+			case -3: /* "autotune" */
+				hwif->drives[0].autotune = IDE_TUNE_AUTO;
+				hwif->drives[1].autotune = IDE_TUNE_AUTO;
+				goto obsolete_option;
+			case -2: /* "serialize" */
+			do_serialize:
+				hwif->mate = &ide_hwifs[hw^1];
+				hwif->mate->mate = hwif;
+				hwif->serialized = hwif->mate->serialized = 1;
+				goto obsolete_option;
+
+			case -1: /* "noprobe" */
+				hwif->noprobe = 1;
+				goto done;
+
+			case 1:	/* base */
+				vals[1] = vals[0] + 0x206; /* default ctl */
+			case 2: /* base,ctl */
+				vals[2] = 0;	/* default irq = probe for it */
+			case 3: /* base,ctl,irq */
+				hwif->hw.irq = vals[2];
+				ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
+				memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
+				hwif->irq      = vals[2];
+				hwif->noprobe  = 0;
+				hwif->chipset  = ide_forced;
+				goto obsolete_option;
+
+			case 0: goto bad_option;
+			default:
+				printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
+				return 1;
+		}
+	}
+bad_option:
+	printk(" -- BAD OPTION\n");
+	return 1;
+obsolete_option:
+	printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
+	return 1;
+bad_hwif:
+	printk("-- NOT SUPPORTED ON ide%d", hw);
+done:
+	printk("\n");
+	return 1;
+}
+
+extern void pnpide_init(void);
+extern void h8300_ide_init(void);
+
+/*
+ * probe_for_hwifs() finds/initializes "known" IDE interfaces
+ */
+static void __init probe_for_hwifs (void)
+{
+#ifdef CONFIG_BLK_DEV_IDEPCI
+	ide_scan_pcibus(ide_scan_direction);
+#endif /* CONFIG_BLK_DEV_IDEPCI */
+
+#ifdef CONFIG_ETRAX_IDE
+	{
+		extern void init_e100_ide(void);
+		init_e100_ide();
+	}
+#endif /* CONFIG_ETRAX_IDE */
+#ifdef CONFIG_BLK_DEV_CMD640
+	{
+		extern void ide_probe_for_cmd640x(void);
+		ide_probe_for_cmd640x();
+	}
+#endif /* CONFIG_BLK_DEV_CMD640 */
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+	{
+		extern void pmac_ide_probe(void);
+		pmac_ide_probe();
+	}
+#endif /* CONFIG_BLK_DEV_IDE_PMAC */
+#ifdef CONFIG_BLK_DEV_GAYLE
+	{
+		extern void gayle_init(void);
+		gayle_init();
+	}
+#endif /* CONFIG_BLK_DEV_GAYLE */
+#ifdef CONFIG_BLK_DEV_FALCON_IDE
+	{
+		extern void falconide_init(void);
+		falconide_init();
+	}
+#endif /* CONFIG_BLK_DEV_FALCON_IDE */
+#ifdef CONFIG_BLK_DEV_MAC_IDE
+	{
+		extern void macide_init(void);
+		macide_init();
+	}
+#endif /* CONFIG_BLK_DEV_MAC_IDE */
+#ifdef CONFIG_BLK_DEV_Q40IDE
+	{
+		extern void q40ide_init(void);
+		q40ide_init();
+	}
+#endif /* CONFIG_BLK_DEV_Q40IDE */
+#ifdef CONFIG_BLK_DEV_BUDDHA
+	{
+		extern void buddha_init(void);
+		buddha_init();
+	}
+#endif /* CONFIG_BLK_DEV_BUDDHA */
+#ifdef CONFIG_BLK_DEV_IDEPNP
+	pnpide_init();
+#endif
+#ifdef CONFIG_H8300
+	h8300_ide_init();
+#endif
+}
+
+int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ide_lock, flags);
+	if (!drive->present || drive->driver != NULL ||
+	    drive->usage || drive->dead) {
+		spin_unlock_irqrestore(&ide_lock, flags);
+		return 1;
+	}
+	drive->driver = driver;
+	spin_unlock_irqrestore(&ide_lock, flags);
+	spin_lock(&drives_lock);
+	list_add_tail(&drive->list, driver ? &driver->drives : &ide_drives);
+	spin_unlock(&drives_lock);
+//	printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name);
+#ifdef CONFIG_PROC_FS
+	if (driver)
+		ide_add_proc_entries(drive->proc, driver->proc, drive);
+#endif
+	return 0;
+}
+
+EXPORT_SYMBOL(ide_register_subdriver);
+
+/**
+ *	ide_unregister_subdriver	-	disconnect drive from driver
+ *	@drive: drive to unplug
+ *
+ *	Disconnect a drive from the driver it was attached to and then
+ *	clean up the various proc files and other objects attached to it.
+ *
+ *	Takes ide_setting_sem, ide_lock and drives_lock.
+ *	Caller must hold none of the locks.
+ *
+ *	No locking versus subdriver unload because we are moving to the
+ *	default driver anyway. Wants double checking.
+ */
+
+int ide_unregister_subdriver (ide_drive_t *drive)
+{
+	unsigned long flags;
+	
+	down(&ide_setting_sem);
+	spin_lock_irqsave(&ide_lock, flags);
+	if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) {
+		spin_unlock_irqrestore(&ide_lock, flags);
+		up(&ide_setting_sem);
+		return 1;
+	}
+#ifdef CONFIG_PROC_FS
+	ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc);
+#endif
+	auto_remove_settings(drive);
+	drive->driver = NULL;
+	spin_unlock_irqrestore(&ide_lock, flags);
+	up(&ide_setting_sem);
+	spin_lock(&drives_lock);
+	list_del_init(&drive->list);
+	spin_unlock(&drives_lock);
+	/* drive will be added to &ide_drives in ata_attach() */
+	return 0;
+}
+
+EXPORT_SYMBOL(ide_unregister_subdriver);
+
+static int ide_drive_remove(struct device * dev)
+{
+	ide_drive_t * drive = container_of(dev,ide_drive_t,gendev);
+	DRIVER(drive)->cleanup(drive);
+	return 0;
+}
+
+/**
+ *	ide_register_driver	-	register IDE device driver
+ *	@driver: the IDE device driver
+ *
+ *	Register a new device driver and then scan the devices
+ *	on the IDE bus in case any should be attached to the
+ *	driver we have just registered.  If so attach them.
+ *
+ *	Takes drivers_lock and drives_lock.
+ */
+
+int ide_register_driver(ide_driver_t *driver)
+{
+	struct list_head list;
+	struct list_head *list_loop;
+	struct list_head *tmp_storage;
+
+	spin_lock(&drivers_lock);
+	list_add(&driver->drivers, &drivers);
+	spin_unlock(&drivers_lock);
+
+	INIT_LIST_HEAD(&list);
+	spin_lock(&drives_lock);
+	list_splice_init(&ide_drives, &list);
+	spin_unlock(&drives_lock);
+
+	list_for_each_safe(list_loop, tmp_storage, &list) {
+		ide_drive_t *drive = container_of(list_loop, ide_drive_t, list);
+		list_del_init(&drive->list);
+		if (drive->present)
+			ata_attach(drive);
+	}
+	driver->gen_driver.name = (char *) driver->name;
+	driver->gen_driver.bus = &ide_bus_type;
+	driver->gen_driver.remove = ide_drive_remove;
+	return driver_register(&driver->gen_driver);
+}
+
+EXPORT_SYMBOL(ide_register_driver);
+
+/**
+ *	ide_unregister_driver	-	unregister IDE device driver
+ *	@driver: the IDE device driver
+ *
+ *	Called when a driver module is being unloaded. We reattach any
+ *	devices to whatever driver claims them next (typically the default
+ *	driver).
+ *
+ *	Takes drivers_lock and called functions will take ide_setting_sem.
+ */
+
+void ide_unregister_driver(ide_driver_t *driver)
+{
+	ide_drive_t *drive;
+
+	spin_lock(&drivers_lock);
+	list_del(&driver->drivers);
+	spin_unlock(&drivers_lock);
+
+	driver_unregister(&driver->gen_driver);
+
+	while(!list_empty(&driver->drives)) {
+		drive = list_entry(driver->drives.next, ide_drive_t, list);
+		if (driver->cleanup(drive)) {
+			printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
+			BUG();
+		}
+		ata_attach(drive);
+	}
+}
+
+EXPORT_SYMBOL(ide_unregister_driver);
+
+/*
+ * Probe module
+ */
+
+EXPORT_SYMBOL(ide_lock);
+
+struct bus_type ide_bus_type = {
+	.name		= "ide",
+	.suspend	= generic_ide_suspend,
+	.resume		= generic_ide_resume,
+};
+
+/*
+ * This is gets invoked once during initialization, to set *everything* up
+ */
+static int __init ide_init(void)
+{
+	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
+	devfs_mk_dir("ide");
+	system_bus_speed = ide_system_bus_speed();
+
+	bus_register(&ide_bus_type);
+
+	init_ide_data();
+
+#ifdef CONFIG_PROC_FS
+	proc_ide_root = proc_mkdir("ide", NULL);
+#endif
+
+#ifdef CONFIG_BLK_DEV_ALI14XX
+	if (probe_ali14xx)
+		(void)ali14xx_init();
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+	if (probe_umc8672)
+		(void)umc8672_init();
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+	if (probe_dtc2278)
+		(void)dtc2278_init();
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+	if (probe_ht6560b)
+		(void)ht6560b_init();
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+	if (probe_qd65xx)
+		(void)qd65xx_init();
+#endif
+
+	initializing = 1;
+	/* Probe for special PCI and other "known" interface chipsets. */
+	probe_for_hwifs();
+	initializing = 0;
+
+#ifdef CONFIG_PROC_FS
+	proc_ide_create();
+#endif
+	return 0;
+}
+
+#ifdef MODULE
+static char *options = NULL;
+module_param(options, charp, 0);
+MODULE_LICENSE("GPL");
+
+static void __init parse_options (char *line)
+{
+	char *next = line;
+
+	if (line == NULL || !*line)
+		return;
+	while ((line = next) != NULL) {
+ 		if ((next = strchr(line,' ')) != NULL)
+			*next++ = 0;
+		if (!ide_setup(line))
+			printk (KERN_INFO "Unknown option '%s'\n", line);
+	}
+}
+
+int init_module (void)
+{
+	parse_options(options);
+	return ide_init();
+}
+
+void cleanup_module (void)
+{
+	int index;
+
+	for (index = 0; index < MAX_HWIFS; ++index)
+		ide_unregister(index);
+
+#ifdef CONFIG_PROC_FS
+	proc_ide_destroy();
+#endif
+	devfs_remove("ide");
+
+	bus_unregister(&ide_bus_type);
+}
+
+#else /* !MODULE */
+
+__setup("", ide_setup);
+
+module_init(ide_init);
+
+#endif /* MODULE */