2006-10-08 Thomas Schwinge <tschwinge@gnu.org>

* linux/dev/drivers/block/ide.c: Move file...
	* linux/src/drivers/block/ide.c: ... here.

3 files changed, 54 insertions, 3863 deletions

diff --git a/ChangeLog b/ChangeLog
index d009f8c..fcfad53 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2006-10-08  Thomas Schwinge  <tschwinge@gnu.org>
 
+	* linux/dev/drivers/block/ide.c: Move file...
+	* linux/src/drivers/block/ide.c: ... here.
+	
 	* linux/dev/drivers/block/ide-cd.c: Remove file.
 	* linux/src/drivers/block/ide-cd.c (cdrom_sleep): Don't define function
 	`#ifndef MACH'.
diff --git a/linux/dev/drivers/block/ide.c b/linux/dev/drivers/block/ide.c
deleted file mode 100644
index 5dcd0aa..0000000
--- a/linux/dev/drivers/block/ide.c
+++ /dev/null
@@ -1,3839 +0,0 @@
-/*
- *  linux/drivers/block/ide.c	Version 5.53  Jun  24, 1997
- *
- *  Copyright (C) 1994-1996  Linus Torvalds & authors (see below)
- */
-#define _IDE_C		/* needed by <linux/blk.h> */
-
-/*
- *  Maintained by Mark Lord  <mlord@pobox.com>
- *            and Gadi Oxman <gadio@netvision.net.il>
- *
- * This is the multiple IDE interface driver, as evolved from hd.c.
- * It supports up to four 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
- *
- * It is easy to extend ide.c to handle more than four interfaces:
- *
- *	Change the MAX_HWIFS constant in ide.h.
- *
- *	Define some new major numbers (in major.h), and insert them into
- *	the ide_hwif_to_major table in ide.c.
- *
- *	Fill in the extra values for the new interfaces into the two tables
- *	inside ide.c:  default_io_base[]  and  default_irqs[].
- *
- *	Create the new request handlers by cloning "do_ide3_request()"
- *	for each new interface, and add them to the switch statement
- *	in the ide_init() function in ide.c.
- *
- *	Recompile, create the new /dev/ entries, and it will probably work.
- *
- *  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@mipg.upenn.edu)		("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 3.5		correct the bios_cyl field if it's too small
- *  (linux 1.1.76)	 (to help fdisk with brain-dead BIOSs)
- *  Version 3.6		cosmetic corrections to comments and stuff
- *  (linux 1.1.77)	reorganise probing code to make it understandable
- *			added halfway retry to probing for drive identification
- *			added "hdx=noprobe" command line option
- *			allow setting multmode even when identification fails
- *  Version 3.7		move set_geometry=1 from do_identify() to ide_init()
- *			increase DRQ_WAIT to eliminate nuisance messages
- *			wait for DRQ_STAT instead of DATA_READY during probing
- *			  (courtesy of Gary Thomas gary@efland.UU.NET)
- *  Version 3.8		fixed byte-swapping for confused Mitsumi cdrom drives
- *			update of ide-cd.c from Scott, allows blocksize=1024
- *			cdrom probe fixes, inspired by jprang@uni-duisburg.de
- *  Version 3.9		don't use LBA if lba_capacity looks funny
- *			correct the drive capacity calculations
- *			fix probing for old Seagates without IDE_ALTSTATUS_REG
- *			fix byte-ordering for some NEC cdrom drives
- *  Version 3.10	disable multiple mode by default; was causing trouble
- *  Version 3.11	fix mis-identification of old WD disks as cdroms
- *  Version 3,12	simplify logic for selecting initial mult_count
- *			  (fixes problems with buggy WD drives)
- *  Version 3.13	remove excess "multiple mode disabled" messages
- *  Version 3.14	fix ide_error() handling of BUSY_STAT
- *			fix byte-swapped cdrom strings (again.. arghh!)
- *			ignore INDEX bit when checking the ALTSTATUS reg
- *  Version 3.15	add SINGLE_THREADED flag for use with dual-CMD i/f
- *			ignore WRERR_STAT for non-write operations
- *			added vlb_sync support for DC-2000A & others,
- *			 (incl. some Promise chips), courtesy of Frank Gockel
- *  Version 3.16	convert vlb_32bit and vlb_sync into runtime flags
- *			add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET)
- *			rename SINGLE_THREADED to SUPPORT_SERIALIZE,
- *			add boot flag to "serialize" operation for CMD i/f
- *			add optional support for DTC2278 interfaces,
- *			 courtesy of andy@cercle.cts.com (Dyan Wile).
- *			add boot flag to enable "dtc2278" probe
- *			add probe to avoid EATA (SCSI) interfaces,
- *			 courtesy of neuffer@goofy.zdv.uni-mainz.de.
- *  Version 4.00	tidy up verify_area() calls - heiko@colossus.escape.de
- *			add flag to ignore WRERR_STAT for some drives
- *			 courtesy of David.H.West@um.cc.umich.edu
- *			assembly syntax tweak to vlb_sync
- *			removable drive support from scuba@cs.tu-berlin.de
- *			add transparent support for DiskManager-6.0x "Dynamic
- *			 Disk Overlay" (DDO), most of this is in genhd.c
- *			eliminate "multiple mode turned off" message at boot
- *  Version 4.10	fix bug in ioctl for "hdparm -c3"
- *			fix DM6:DDO support -- now works with LILO, fdisk, ...
- *			don't treat some naughty WD drives as removable
- *  Version 4.11	updated DM6 support using info provided by OnTrack
- *  Version 5.00	major overhaul, multmode setting fixed, vlb_sync fixed
- *			added support for 3rd/4th/alternative IDE ports
- *			created ide.h; ide-cd.c now compiles separate from ide.c
- *			hopefully fixed infinite "unexpected_intr" from cdroms
- *			zillions of other changes and restructuring
- *			somehow reduced overall memory usage by several kB
- *			probably slowed things down slightly, but worth it
- *  Version 5.01	AT LAST!!  Finally understood why "unexpected_intr"
- *			 was happening at various times/places:  whenever the
- *			 ide-interface's ctl_port was used to "mask" the irq,
- *			 it also would trigger an edge in the process of masking
- *			 which would result in a self-inflicted interrupt!!
- *			 (such a stupid way to build a hardware interrupt mask).
- *			 This is now fixed (after a year of head-scratching).
- *  Version 5.02	got rid of need for {enable,disable}_irq_list()
- *  Version 5.03	tune-ups, comments, remove "busy wait" from drive resets
- *			removed PROBE_FOR_IRQS option -- no longer needed
- *			OOOPS!  fixed "bad access" bug for 2nd drive on an i/f
- *  Version 5.04	changed "ira %d" to "irq %d" in DEBUG message
- *			added more comments, cleaned up unexpected_intr()
- *			OOOPS!  fixed null pointer problem in ide reset code
- *			added autodetect for Triton chipset -- no effect yet
- *  Version 5.05	OOOPS!  fixed bug in revalidate_disk()
- *			OOOPS!  fixed bug in ide_do_request()
- *			added ATAPI reset sequence for cdroms
- *  Version 5.10	added Bus-Mastered DMA support for Triton Chipset
- *			some (mostly) cosmetic changes
- *  Version 5.11	added ht6560b support by malafoss@snakemail.hut.fi
- *			reworked PCI scanning code
- *			added automatic RZ1000 detection/support
- *			added automatic PCI CMD640 detection/support
- *			added option for VLB CMD640 support
- *			tweaked probe to find cdrom on hdb with disks on hda,hdc
- *  Version 5.12	some performance tuning
- *			added message to alert user to bad /dev/hd[cd] entries
- *			OOOPS!  fixed bug in atapi reset
- *			driver now forces "serialize" again for all cmd640 chips
- *			noticed REALLY_SLOW_IO had no effect, moved it to ide.c
- *			made do_drive_cmd() into public ide_do_drive_cmd()
- *  Version 5.13	fixed typo ('B'), thanks to houston@boyd.geog.mcgill.ca
- *			fixed ht6560b support
- *  Version 5.13b (sss)	fix problem in calling ide_cdrom_setup()
- *			don't bother invalidating nonexistent partitions
- *  Version 5.14	fixes to cmd640 support.. maybe it works now(?)
- *			added & tested full EZ-DRIVE support -- don't use LILO!
- *			don't enable 2nd CMD640 PCI port during init - conflict
- *  Version 5.15	bug fix in init_cmd640_vlb()
- *			bug fix in interrupt sharing code
- *  Version 5.16	ugh.. fix "serialize" support, broken in 5.15
- *			remove "Huh?" from cmd640 code
- *			added qd6580 interface speed select from Colten Edwards
- *  Version 5.17	kludge around bug in BIOS32 on Intel triton motherboards
- *  Version 5.18	new CMD640 code, moved to cmd640.c, #include'd for now
- *			new UMC8672 code, moved to umc8672.c, #include'd for now
- *			disallow turning on DMA when h/w not capable of DMA
- *  Version 5.19	fix potential infinite timeout on resets
- *			extend reset poll into a general purpose polling scheme
- *			add atapi tape drive support from Gadi Oxman
- *			simplify exit from _intr routines -- no IDE_DO_REQUEST
- *  Version 5.20	leave current rq on blkdev request list during I/O
- *			generalized ide_do_drive_cmd() for tape/cdrom driver use
- *  Version 5.21	fix nasty cdrom/tape bug (ide_preempt was messed up)
- *  Version 5.22	fix ide_xlate_1024() to work with/without drive->id
- *  Version 5.23	miscellaneous touch-ups
- *  Version 5.24	fix #if's for SUPPORT_CMD640
- *  Version 5.25	more touch-ups, fix cdrom resets, ...
- *			cmd640.c now configs/compiles separate from ide.c
- *  Version 5.26	keep_settings now maintains the using_dma flag
- *			fix [EZD] remap message to only output at boot time
- *			fix "bad /dev/ entry" message to say hdc, not hdc0
- *			fix ide_xlate_1024() to respect user specified CHS
- *			use CHS from partn table if it looks translated
- *			re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit
- *			keep track of interface chipset type, when known
- *			add generic PIO mode "tuneproc" mechanism
- *			fix cmd640_vlb option
- *			fix ht6560b support (was completely broken)
- *			umc8672.c now configures/compiles separate from ide.c
- *			move dtc2278 support to dtc2278.c
- *			move ht6560b support to ht6560b.c
- *			move qd6580  support to qd6580.c
- *			add  ali14xx support in ali14xx.c
- * Version 5.27		add [no]autotune parameters to help cmd640
- *			move rz1000  support to rz1000.c
- * Version 5.28		#include "ide_modes.h"
- *			fix disallow_unmask: now per-interface "no_unmask" bit
- *			force io_32bit to be the same on drive pairs of dtc2278
- *			improved IDE tape error handling, and tape DMA support
- *			bugfix in ide_do_drive_cmd() for cdroms + serialize
- * Version 5.29		fixed non-IDE check for too many physical heads
- *			don't use LBA if capacity is smaller than CHS
- * Version 5.30		remove real_devices kludge, formerly used by genhd.c
- * Version 5.32		change "KB" to "kB"
- *			fix serialize (was broken in kernel 1.3.72)
- *			add support for "hdparm -I"
- *			use common code for disk/tape/cdrom IDE_DRIVE_CMDs
- *			add support for Promise DC4030VL caching card
- *			improved serialize support
- *			put partition check back into alphabetical order
- *			add config option for PCMCIA baggage
- *			try to make PCMCIA support safer to use
- *			improve security on ioctls(): all are suser() only
- * Version 5.33		improve handling of HDIO_DRIVE_CMDs that read data
- * Version 5.34		fix irq-sharing problem from 5.33
- *			fix cdrom ioctl problem from 5.33
- * Version 5.35		cosmetic changes
- *			fix cli() problem in try_to_identify()
- * Version 5.36		fixes to optional PCMCIA support
- * Version 5.37		don't use DMA when "noautotune" is specified
- * Version 5.37a (go)	fix shared irq probing (was broken in kernel 1.3.72)
- *			call unplug_device() from ide_do_drive_cmd()
- * Version 5.38		add "hdx=none" option, courtesy of Joel Maslak
- *			mask drive irq after use, if sharing with another hwif
- *			add code to help debug weird cmd640 problems
- * Version 5.39		fix horrible error in earlier irq sharing "fix"
- * Version 5.40		fix serialization -- was broken in 5.39
- *			help sharing by masking device irq after probing
- * Version 5.41		more fixes to irq sharing/serialize detection
- *			disable io_32bit by default on drive reset
- * Version 5.42		simplify irq-masking after probe
- *			fix NULL pointer deref in save_match()
- * Version 5.43		Ugh.. unexpected_intr is back: try to exterminate it
- * Version 5.44		Fix for "irq probe failed" on cmd640
- *			change path on message regarding MAKEDEV.ide
- *			add a throttle to the unexpected_intr() messages
- * Version 5.45		fix ugly parameter parsing bugs (thanks Derek)
- *			include Gadi's magic fix for cmd640 unexpected_intr
- *			include mc68000 patches from Geert Uytterhoeven
- *			add Gadi's fix for PCMCIA cdroms
- * Version 5.46		remove the mc68000 #ifdefs for 2.0.x
- * Version 5.47		fix set_tune race condition
- *			fix bug in earlier PCMCIA cdrom update
- * Version 5.48		if def'd, invoke CMD640_DUMP_REGS when irq probe fails
- *			lengthen the do_reset1() pulse, for laptops
- *			add idebus=xx parameter for cmd640 and ali chipsets
- *			no_unmask flag now per-drive instead of per-hwif
- *			fix tune_req so that it gets done immediately
- *			fix missing restore_flags() in ide_ioctl
- *			prevent use of io_32bit on cmd640 with no prefetch
- * Version 5.49		fix minor quirks in probing routines
- * 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 5.53		add ATAPI floppy drive support
- *			change default media for type 0 to floppy
- *			add support for Exabyte Nest
- *			add missing set_blocksize() in revalidate_disk()
- *			handle bad status bit sequencing in ide_wait_stat()
- *			support partition table translations with 255 heads
- *			probe all interfaces by default
- *			add probe for the i82371AB chipset
- *			acknowledge media change on removable drives
- *			add work-around for BMI drives
- *			remove "LBA" from boot messages
- * Version 5.53.1	add UDMA "CRC retry" support
- * Version 5.53.2	add Promise/33 auto-detection and DMA support
- *			fix MC_ERR handling
- *			fix mis-detection of NEC cdrom as floppy
- *			issue ATAPI reset and re-probe after "no response"
- *
- *  Some additional driver compile-time options are in ide.h
- *
- *  To do, in likely order of completion:
- *	- modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
-*/
-
-#undef REALLY_SLOW_IO		/* most systems can safely undef this */
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/major.h>
-#include <linux/blkdev.h>
-#include <linux/errno.h>
-#include <linux/hdreg.h>
-#include <linux/genhd.h>
-#include <linux/malloc.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/segment.h>
-#include <asm/io.h>
-
-#ifdef CONFIG_PCI
-#include <linux/bios32.h>
-#include <linux/pci.h>
-#endif /* CONFIG_PCI */
-
-#include "ide.h"
-#include "ide_modes.h"
-
-#ifdef CONFIG_BLK_DEV_PROMISE
-#include "promise.h"
-#define IS_PROMISE_DRIVE (HWIF(drive)->chipset == ide_promise)
-#else
-#define IS_PROMISE_DRIVE (0)	/* auto-NULLs out Promise code */
-#endif /* CONFIG_BLK_DEV_PROMISE */
-
-static const byte	ide_hwif_to_major[MAX_HWIFS] = {IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR};
-static const unsigned short default_io_base[MAX_HWIFS] = {0x1f0, 0x170, 0x1e8, 0x168};
-static const byte	default_irqs[MAX_HWIFS]     = {14, 15, 11, 10};
-static int	idebus_parameter; /* holds the "idebus=" parameter */
-static int	system_bus_speed; /* holds what we think is VESA/PCI bus speed */
-
-/*
- * This is declared extern in ide.h, for access by other IDE modules:
- */
-ide_hwif_t	ide_hwifs[MAX_HWIFS];	/* master data repository */
-
-#if (DISK_RECOVERY_TIME > 0)
-/*
- * For really screwy hardware (hey, at least it *can* be used with Linux)
- * we can enforce a minimum delay time between successive operations.
- */
-static unsigned long read_timer(void)
-{
-	unsigned long t, flags;
-	int i;
-
-	save_flags(flags);
-	cli();
-	t = jiffies * 11932;
-    	outb_p(0, 0x43);
-	i = inb_p(0x40);
-	i |= inb(0x40) << 8;
-	restore_flags(flags);
-	return (t - i);
-}
-
-static void set_recovery_timer (ide_hwif_t *hwif)
-{
-	hwif->last_time = read_timer();
-}
-#define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive)
-
-#else
-
-#define SET_RECOVERY_TIMER(drive)
-
-#endif /* DISK_RECOVERY_TIME */
-
-
-/*
- * Do not even *think* about calling this!
- */
-static void init_hwif_data (unsigned int index)
-{
-	byte *p;
-	unsigned int unit;
-	ide_hwif_t *hwif = &ide_hwifs[index];
-
-	/* bulk initialize hwif & drive info with zeros */
-	p = ((byte *) hwif) + sizeof(ide_hwif_t);
-	do {
-		*--p = 0;
-	} while (p > (byte *) hwif);
-
-	/* fill in any non-zero initial values */
-	hwif->index     = index;
-	hwif->io_base	= default_io_base[index];
-	hwif->ctl_port	= hwif->io_base ? hwif->io_base+0x206 : 0x000;
-#ifdef CONFIG_BLK_DEV_HD
-	if (hwif->io_base == HD_DATA)
-		hwif->noprobe = 1; /* may be overridden by ide_setup() */
-#endif /* CONFIG_BLK_DEV_HD */
-	hwif->major	= ide_hwif_to_major[index];
-	hwif->name[0]	= 'i';
-	hwif->name[1]	= 'd';
-	hwif->name[2]	= 'e';
-	hwif->name[3]	= '0' + index;
-#ifdef CONFIG_BLK_DEV_IDETAPE
-	hwif->tape_drive = NULL;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
-
-		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';
-#ifdef MACH
-		drive->name[2]			= '0' + (index * MAX_DRIVES) + unit;
-#else
-		drive->name[2]			= 'a' + (index * MAX_DRIVES) + unit;
-#endif
-	}
-}
-
-/*
- * 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.
- */
-#define MAGIC_COOKIE 0x12345678
-static void init_ide_data (void)
-{
-	unsigned int index;
-	static unsigned long magic_cookie = MAGIC_COOKIE;
-
-	if (magic_cookie != MAGIC_COOKIE)
-		return;		/* already initialized */
-	magic_cookie = 0;
-
-	for (index = 0; index < MAX_HWIFS; ++index)
-		init_hwif_data(index);
-
-	idebus_parameter = 0;
-	system_bus_speed = 0;
-}
-
-/*
- * 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.
- */
-int ide_system_bus_speed (void)
-{
-	if (!system_bus_speed) {
-		if (idebus_parameter)
-			system_bus_speed = idebus_parameter;	/* user supplied value */
-#ifdef CONFIG_PCI
-		else if (pcibios_present())
-			system_bus_speed = 40;	/* safe default value for PCI */
-#endif /* CONFIG_PCI */
-		else
-			system_bus_speed = 50;	/* safe default value for VESA and PCI */
-		printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed);
-	}
-	return system_bus_speed;
-}
-
-#if SUPPORT_VLB_SYNC
-/*
- * 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.
- */
-static inline void do_vlb_sync (unsigned short port) {
-	(void) inb (port);
-	(void) inb (port);
-	(void) inb (port);
-}
-#endif /* SUPPORT_VLB_SYNC */
-
-/*
- * This is used for most PIO data transfers *from* the IDE interface
- */
-void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
-{
-	unsigned short io_base  = HWIF(drive)->io_base;
-	unsigned short data_reg = io_base+IDE_DATA_OFFSET;
-	byte io_32bit = drive->io_32bit;
-
-	if (io_32bit) {
-#if SUPPORT_VLB_SYNC
-		if (io_32bit & 2) {
-			cli();
-			do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
-			insl(data_reg, buffer, wcount);
-			if (drive->unmask)
-				sti();
-		} else
-#endif /* SUPPORT_VLB_SYNC */
-			insl(data_reg, buffer, wcount);
-	} else {
-#if SUPPORT_SLOW_DATA_PORTS
-		if (drive->slow) {
-			unsigned short *ptr = (unsigned short *) buffer;
-			while (wcount--) {
-				*ptr++ = inw_p(data_reg);
-				*ptr++ = inw_p(data_reg);
-			}
-		} else
-#endif /* SUPPORT_SLOW_DATA_PORTS */
-			insw(data_reg, buffer, wcount<<1);
-	}
-}
-
-/*
- * This is used for most PIO data transfers *to* the IDE interface
- */
-void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
-{
-	unsigned short io_base  = HWIF(drive)->io_base;
-	unsigned short data_reg = io_base+IDE_DATA_OFFSET;
-	byte io_32bit = drive->io_32bit;
-
-	if (io_32bit) {
-#if SUPPORT_VLB_SYNC
-		if (io_32bit & 2) {
-			cli();
-			do_vlb_sync(io_base+IDE_NSECTOR_OFFSET);
-			outsl(data_reg, buffer, wcount);
-			if (drive->unmask)
-				sti();
-		} else
-#endif /* SUPPORT_VLB_SYNC */
-			outsl(data_reg, buffer, wcount);
-	} else {
-#if SUPPORT_SLOW_DATA_PORTS
-		if (drive->slow) {
-			unsigned short *ptr = (unsigned short *) buffer;
-			while (wcount--) {
-				outw_p(*ptr++, data_reg);
-				outw_p(*ptr++, data_reg);
-			}
-		} else
-#endif /* SUPPORT_SLOW_DATA_PORTS */
-			outsw(data_reg, buffer, wcount<<1);
-	}
-}
-
-/*
- * 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, unsigned int bytecount)
-{
-	++bytecount;
-	ide_input_data (drive, buffer, bytecount / 4);
-	if ((bytecount & 0x03) >= 2)
-		insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
-}
-
-void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
-{
-	++bytecount;
-	ide_output_data (drive, buffer, bytecount / 4);
-	if ((bytecount & 0x03) >= 2)
-		outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
-}
-
-/*
- * 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 timer_expiry() handler later on).
- */
-void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout)
-{
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-#ifdef DEBUG
-	if (hwgroup->handler != NULL) {
-		printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
-			drive->name, hwgroup->handler, handler);
-	}
-#endif
-	hwgroup->handler       = handler;
-	hwgroup->timer.expires = jiffies + timeout;
-	add_timer(&(hwgroup->timer));
-}
-
-/*
- * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
- * value for this drive (from its reported identification information).
- *
- * Returns:	1 if lba_capacity looks sensible
- *		0 otherwise
- */
-static int lba_capacity_is_ok (struct hd_driveid *id)
-{
-	unsigned long lba_sects   = id->lba_capacity;
-	unsigned long chs_sects   = id->cyls * id->heads * id->sectors;
-	unsigned long _10_percent = chs_sects / 10;
-
-	/* very large drives (8GB+) may lie about the number of cylinders */
-	if (id->cyls == 16383 && id->heads == 16 && id->sectors == 63 && lba_sects > chs_sects) {
-		return 1;	/* lba_capacity is our only option */
-	}
-	/* perform a rough sanity check on lba_sects:  within 10% is "okay" */
-	if ((lba_sects - chs_sects) < _10_percent)
-		return 1;	/* lba_capacity is good */
-
-	/* some drives have the word order reversed */
-	lba_sects = (lba_sects << 16) | (lba_sects >> 16);
-	if ((lba_sects - chs_sects) < _10_percent) {
-		id->lba_capacity = lba_sects;	/* fix it */
-		return 1;	/* lba_capacity is (now) good */
-	}
-	return 0;	/* lba_capacity value is bad */
-}
-
-/*
- * current_capacity() returns the capacity (in sectors) of a drive
- * according to its current geometry/LBA settings.
- */
-static unsigned long current_capacity (ide_drive_t  *drive)
-{
-	struct hd_driveid *id = drive->id;
-	unsigned long capacity = drive->cyl * drive->head * drive->sect;
-
-	if (!drive->present)
-		return 0;
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-	if (drive->media == ide_floppy)
-		return idefloppy_capacity(drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-	if (drive->media != ide_disk)
-		return 0x7fffffff;	/* cdrom or tape */
-	drive->select.b.lba = 0;
-	/* Determine capacity, and use LBA if the drive properly supports it */
-	if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) {
-		if (id->lba_capacity >= capacity) {
-			capacity = id->lba_capacity;
-			drive->select.b.lba = 1;
-		}
-	}
-	return (capacity - drive->sect0);
-}
-
-/*
- * ide_geninit() is called exactly *once* for each major, from genhd.c,
- * at the beginning of the initial partition check for the drives.
- */
-static void ide_geninit (struct gendisk *gd)
-{
-	unsigned int unit;
-	ide_hwif_t *hwif = gd->real_devices;
-
-	for (unit = 0; unit < gd->nr_real; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
-#ifdef CONFIG_BLK_DEV_IDECD
-		if (drive->present && drive->media == ide_cdrom)
-			ide_cdrom_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-		if (drive->present && drive->media == ide_tape)
-			idetape_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-		if (drive->present && drive->media == ide_floppy)
-			idefloppy_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-		drive->part[0].nr_sects = current_capacity(drive);
-		if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) ||
-		    !drive->part[0].nr_sects) {
-			drive->part[0].start_sect = -1; /* skip partition check */
-		}
-	}
-}
-
-/*
- * init_gendisk() (as opposed to ide_geninit) is called for each major device,
- * after probing for drives, to allocate partition tables and other data
- * structures needed for the routines in genhd.c.  ide_geninit() gets called
- * somewhat later, during the partition check.
- */
-static void init_gendisk (ide_hwif_t *hwif)
-{
-	struct gendisk *gd, **gdp;
-	unsigned int unit, units, minors;
-	int *bs;
-
-	/* figure out maximum drive number on the interface */
-	for (units = MAX_DRIVES; units > 0; --units) {
-		if (hwif->drives[units-1].present)
-			break;
-	}
-	minors    = units * (1<<PARTN_BITS);
-	gd        = kmalloc (sizeof(struct gendisk), GFP_KERNEL);
-	gd->sizes = kmalloc (minors * sizeof(int), GFP_KERNEL);
-	gd->part  = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL);
-	bs        = kmalloc (minors*sizeof(int), GFP_KERNEL);
-
-	memset(gd->part, 0, minors * sizeof(struct hd_struct));
-
-	/* cdroms and msdos f/s are examples of non-1024 blocksizes */
-	blksize_size[hwif->major] = bs;
-	for (unit = 0; unit < minors; ++unit)
-		*bs++ = BLOCK_SIZE;
-
-	for (unit = 0; unit < units; ++unit)
-		hwif->drives[unit].part = &gd->part[unit << PARTN_BITS];
-
-	gd->major	= hwif->major;		/* our major device number */
-	gd->major_name	= IDE_MAJOR_NAME;	/* treated special in genhd.c */
-	gd->minor_shift	= PARTN_BITS;		/* num bits for partitions */
-	gd->max_p	= 1<<PARTN_BITS;	/* 1 + max partitions / drive */
-	gd->max_nr	= units;		/* max num real drives */
-	gd->nr_real	= units;		/* current num real drives */
-	gd->init	= ide_geninit;		/* initialization function */
-	gd->real_devices= hwif;			/* ptr to internal data */
-	gd->next	= NULL;			/* linked list of major devs */
-
-	for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ;
-	hwif->gd = *gdp = gd;			/* link onto tail of list */
-}
-
-static void do_reset1 (ide_drive_t *, int);		/* needed below */
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-/*
- * 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 void atapi_reset_pollfunc (ide_drive_t *drive)
-{
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-	byte stat;
-
-	OUT_BYTE (drive->select.all, IDE_SELECT_REG);
-	udelay (10);
-
-	if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) {
-		printk("%s: ATAPI reset complete\n", drive->name);
-	} else {
-		if (jiffies < hwgroup->poll_timeout) {
-			ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
-			return;	/* continue polling */
-		}
-		hwgroup->poll_timeout = 0;	/* end of polling */
-		printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat);
-		do_reset1 (drive, 1);	/* do it the old fashioned way */
-		return;
-	}
-	hwgroup->poll_timeout = 0;	/* done polling */
-}
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
-/*
- * 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 void reset_pollfunc (ide_drive_t *drive)
-{
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-	ide_hwif_t *hwif = HWIF(drive);
-	byte tmp;
-
-	if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) {
-		if (jiffies < hwgroup->poll_timeout) {
-			ide_set_handler (drive, &reset_pollfunc, HZ/20);
-			return;	/* continue polling */
-		}
-		printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
-	} else  {
-		printk("%s: reset: ", hwif->name);
-		if ((tmp = GET_ERR()) == 1)
-			printk("success\n");
-		else {
-#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 */
-}
-
-/*
- * 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 void do_reset1 (ide_drive_t *drive, int  do_not_try_atapi)
-{
-	unsigned int unit;
-	unsigned long flags;
-	ide_hwif_t *hwif = HWIF(drive);
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-
-	save_flags(flags);
-	cli();		/* Why ? */
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-	/* For an ATAPI device, first try an ATAPI SRST. */
-	if (drive->media != ide_disk) {
-		if (!do_not_try_atapi) {
-			if (!drive->keep_settings) {
-				drive->unmask = 0;
-				drive->io_32bit = 0;
-			}
-			OUT_BYTE (drive->select.all, IDE_SELECT_REG);
-			udelay (20);
-			OUT_BYTE (WIN_SRST, IDE_COMMAND_REG);
-			hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
-			ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20);
-			restore_flags (flags);
-			return;
-		}
-	}
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
-	/*
-	 * First, reset any device state data we were maintaining
-	 * for any of the drives on this interface.
-	 */
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *rdrive = &hwif->drives[unit];
-#ifdef CONFIG_BLK_DEV_IDETAPE
-		if (rdrive->media == ide_tape)
-			rdrive->tape.reset_issued = 1;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-		rdrive->special.all = 0;
-		rdrive->special.b.set_geometry = 1;
-		rdrive->special.b.recalibrate  = 1;
-		if (OK_TO_RESET_CONTROLLER)
-			rdrive->mult_count = 0;
-		if (!rdrive->keep_settings) {
-			rdrive->mult_req = 0;
-			rdrive->unmask = 0;
-			rdrive->io_32bit = 0;
-			if (rdrive->using_dma) {
-				rdrive->using_dma = 0;
-				printk("%s: disabled DMA\n", rdrive->name);
-			}
-		}
-		if (rdrive->mult_req != rdrive->mult_count)
-			rdrive->special.b.set_multmode = 1;
-	}
-
-#if OK_TO_RESET_CONTROLLER
-	/*
-	 * 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.
-	 */
-	OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG);	/* set SRST and nIEN */
-	udelay(10);			/* more than enough time */
-	OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG);	/* clear SRST, leave nIEN */
-	udelay(10);			/* more than enough time */
-	hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
-	ide_set_handler (drive, &reset_pollfunc, HZ/20);
-#endif	/* OK_TO_RESET_CONTROLLER */
-
-	restore_flags (flags);
-}
-
-/*
- * ide_do_reset() is the entry point to the drive/interface reset code.
- */
-void ide_do_reset (ide_drive_t *drive)
-{
-	do_reset1 (drive, 0);
-#ifdef CONFIG_BLK_DEV_IDETAPE
-	if (drive->media == ide_tape)
-		drive->tape.reset_issued=1;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-}
-
-/*
- * Clean up after success/failure of an explicit drive cmd
- */
-void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err)
-{
-	unsigned long flags;
-	struct request *rq = HWGROUP(drive)->rq;
-
-	if (rq->cmd == IDE_DRIVE_CMD) {
-		byte *args = (byte *) rq->buffer;
-		rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT);
-		if (args) {
-			args[0] = stat;
-			args[1] = err;
-			args[2] = IN_BYTE(IDE_NSECTOR_REG);
-		}
-	}
-	save_flags(flags);
-	cli();
-	blk_dev[MAJOR(rq->rq_dev)].current_request = rq->next;
-	HWGROUP(drive)->rq = NULL;
-	rq->rq_status = RQ_INACTIVE;
-	if (rq->sem != NULL)
-		up(rq->sem);
-	restore_flags(flags);
-}
-
-/*
- * Error reporting, in human readable form (luxurious, but a memory hog).
- */
-byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat)
-{
-	unsigned long flags;
-	byte err = 0;
-
-	save_flags (flags);
-	sti();
-	printk("%s: %s: status=0x%02x", drive->name, msg, stat);
-#if FANCY_STATUS_DUMPS
-	if (drive->media == ide_disk) {
-		printk(" { ");
-		if (stat & BUSY_STAT)
-			printk("Busy ");
-		else {
-			if (stat & READY_STAT)	printk("DriveReady ");
-			if (stat & WRERR_STAT)	printk("DeviceFault ");
-			if (stat & SEEK_STAT)	printk("SeekComplete ");
-			if (stat & DRQ_STAT)	printk("DataRequest ");
-			if (stat & ECC_STAT)	printk("CorrectedError ");
-			if (stat & INDEX_STAT)	printk("Index ");
-			if (stat & ERR_STAT)	printk("Error ");
-		}
-		printk("}");
-	}
-#endif	/* FANCY_STATUS_DUMPS */
-	printk("\n");
-	if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
-		err = GET_ERR();
-		printk("%s: %s: error=0x%02x", drive->name, msg, err);
-#if FANCY_STATUS_DUMPS
-		if (drive->media == ide_disk) {
-			printk(" { ");
-			if (err & ICRC_ERR)	printk((err & ABRT_ERR) ? "BadCRC " : "BadSector ");
-			if (err & ECC_ERR)	printk("UncorrectableError ");
-			if (err & ID_ERR)	printk("SectorIdNotFound ");
-			if (err & ABRT_ERR)	printk("DriveStatusError ");
-			if (err & TRK0_ERR)	printk("TrackZeroNotFound ");
-			if (err & MARK_ERR)	printk("AddrMarkNotFound ");
-			printk("}");
-			if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
-				byte cur = IN_BYTE(IDE_SELECT_REG);
-				if (cur & 0x40) {	/* using LBA? */
-					printk(", LBAsect=%ld", (unsigned long)
-					 ((cur&0xf)<<24)
-					 |(IN_BYTE(IDE_HCYL_REG)<<16)
-					 |(IN_BYTE(IDE_LCYL_REG)<<8)
-					 | IN_BYTE(IDE_SECTOR_REG));
-				} else {
-					printk(", CHS=%d/%d/%d",
-					 (IN_BYTE(IDE_HCYL_REG)<<8) +
-					  IN_BYTE(IDE_LCYL_REG),
-					  cur & 0xf,
-					  IN_BYTE(IDE_SECTOR_REG));
-				}
-				if (HWGROUP(drive)->rq)
-					printk(", sector=%ld", HWGROUP(drive)->rq->sector);
-			}
-		}
-#endif	/* FANCY_STATUS_DUMPS */
-		printk("\n");
-	}
-	restore_flags (flags);
-	return err;
-}
-
-/*
- * try_to_flush_leftover_data() is invoked in response to a drive
- * unexpectedly having its DRQ_STAT bit set.  As an alternative to
- * resetting the drive, this routine tries to clear the condition
- * by read a sector's worth of data from the drive.  Of course,
- * this may not help if the drive is *waiting* for data from *us*.
- */
-static void try_to_flush_leftover_data (ide_drive_t *drive)
-{
-	int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
-
-	while (i > 0) {
-		unsigned long buffer[16];
-		unsigned int wcount = (i > 16) ? 16 : i;
-		i -= wcount;
-		ide_input_data (drive, buffer, wcount);
-	}
-}
-
-/*
- * ide_error() takes action based on the error returned by the controller.
- */
-void ide_error (ide_drive_t *drive, const char *msg, byte stat)
-{
-	struct request *rq;
-	byte err;
-
-	err = ide_dump_status(drive, msg, stat);
-	if ((rq = HWGROUP(drive)->rq) == NULL || drive == NULL)
-		return;
-	/* retry only "normal" I/O: */
-	if (rq->cmd == IDE_DRIVE_CMD) {
-		rq->errors = 1;
-		ide_end_drive_cmd(drive, stat, err);
-		return;
-	}
-	if (stat & BUSY_STAT) {		/* other bits are useless when BUSY */
-		rq->errors |= ERROR_RESET;
-	} else {
-		if (drive->media == ide_disk && (stat & ERR_STAT)) {
-			/* err has different meaning on cdrom and tape */
-			if (err == ABRT_ERR) {
-				if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY)
-					return;	/* some newer drives don't support WIN_SPECIFY */
-			} else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR))
-				; /* UDMA crc error -- just retry the operation */
-			else if (err & (BBD_ERR | ECC_ERR))	/* retries won't help these */
-				rq->errors = ERROR_MAX;
-			else if (err & TRK0_ERR)	/* help it find track zero */
-				rq->errors |= ERROR_RECAL;
-			else if (err & MC_ERR)
-				drive->special.b.mc = 1;
-		}
-		if ((stat & DRQ_STAT) && rq->cmd != WRITE)
-			try_to_flush_leftover_data(drive);
-	}
-	if (GET_STAT() & (BUSY_STAT|DRQ_STAT))
-		rq->errors |= ERROR_RESET;	/* Mmmm.. timing problem */
-
-	if (rq->errors >= ERROR_MAX) {
-#ifdef CONFIG_BLK_DEV_IDETAPE
-		if (drive->media == ide_tape) {
-			rq->errors = 0;
-			idetape_end_request(0, HWGROUP(drive));
-		} else
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-		if (drive->media == ide_floppy) {
-			rq->errors = 0;
-			idefloppy_end_request(0, HWGROUP(drive));
-		} else
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-		if (drive->media == ide_scsi) {
-			rq->errors = 0;
-			idescsi_end_request(0, HWGROUP(drive));
-		} else
-#endif /* CONFIG_BLK_DEV_IDESCSI */
- 		ide_end_request(0, HWGROUP(drive));
-	}
-	else {
-		if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
-			++rq->errors;
-			ide_do_reset(drive);
-			return;
-		} else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
-			drive->special.b.recalibrate = 1;
-		++rq->errors;
-	}
-}
-
-/*
- * read_intr() is the handler for disk read/multread interrupts
- */
-static void read_intr (ide_drive_t *drive)
-{
-	byte stat;
-	int i;
-	unsigned int msect, nsect;
-	struct request *rq;
-
-	if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
-		ide_error(drive, "read_intr", stat);
-		return;
-	}
-	msect = drive->mult_count;
-read_next:
-	rq = HWGROUP(drive)->rq;
-	if (msect) {
-		if ((nsect = rq->current_nr_sectors) > msect)
-			nsect = msect;
-		msect -= nsect;
-	} else
-		nsect = 1;
-	i = rq->nr_sectors - nsect;
-	if (i > 0 && !msect)
-		ide_set_handler (drive, &read_intr, WAIT_CMD);
-	ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
-#ifdef DEBUG
-	printk("%s:  read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
-		drive->name, rq->sector, rq->sector+nsect-1,
-		(unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
-#endif
-	rq->sector += nsect;
-	rq->buffer += nsect<<9;
-	rq->errors = 0;
-	rq->nr_sectors = i;
-	if ((rq->current_nr_sectors -= nsect) <= 0)
-		ide_end_request(1, HWGROUP(drive));
-	if (i > 0 && msect)
-		goto read_next;
-}
-
-/*
- * write_intr() is the handler for disk write interrupts
- */
-static void write_intr (ide_drive_t *drive)
-{
-	byte stat;
-	int i;
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-	struct request *rq = hwgroup->rq;
-
-	if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
-#ifdef DEBUG
-		printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
-			drive->name, rq->sector, (unsigned long) rq->buffer,
-			rq->nr_sectors-1);
-#endif
-		if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
-			rq->sector++;
-			rq->buffer += 512;
-			rq->errors = 0;
-			i = --rq->nr_sectors;
-			--rq->current_nr_sectors;
-			if (rq->current_nr_sectors <= 0)
-				ide_end_request(1, hwgroup);
-			if (i > 0) {
-				ide_set_handler (drive, &write_intr, WAIT_CMD);
-				ide_output_data (drive, rq->buffer, SECTOR_WORDS);
-			}
-			return;
-		}
-	}
-	ide_error(drive, "write_intr", stat);
-}
-
-/*
- * ide_multwrite() transfers a block of up to mcount sectors of data
- * to a drive as part of a disk multiple-sector write operation.
- */
-void ide_multwrite (ide_drive_t *drive, unsigned int mcount)
-{
-	struct request *rq = &HWGROUP(drive)->wrq;
-
-	do {
-		unsigned int nsect = rq->current_nr_sectors;
-		if (nsect > mcount)
-			nsect = mcount;
-		mcount -= nsect;
-
-		ide_output_data(drive, rq->buffer, nsect<<7);
-#ifdef DEBUG
-		printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n",
-			drive->name, rq->sector, (unsigned long) rq->buffer,
-			nsect, rq->nr_sectors - nsect);
-#endif
-		if ((rq->nr_sectors -= nsect) <= 0)
-			break;
-		if ((rq->current_nr_sectors -= nsect) == 0) {
-			if ((rq->bh = rq->bh->b_reqnext) != NULL) {
-				rq->current_nr_sectors = rq->bh->b_size>>9;
-				rq->buffer             = rq->bh->b_data;
-			} else {
-				panic("%s: buffer list corrupted\n", drive->name);
-				break;
-			}
-		} else {
-			rq->buffer += nsect << 9;
-		}
-	} while (mcount);
-}
-
-/*
- * multwrite_intr() is the handler for disk multwrite interrupts
- */
-static void multwrite_intr (ide_drive_t *drive)
-{
-	byte stat;
-	int i;
-	ide_hwgroup_t *hwgroup = HWGROUP(drive);
-	struct request *rq = &hwgroup->wrq;
-
-	if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
-		if (stat & DRQ_STAT) {
-			if (rq->nr_sectors) {
-				ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
-				ide_multwrite(drive, drive->mult_count);
-				return;
-			}
-		} else {
-			if (!rq->nr_sectors) {	/* all done? */
-				rq = hwgroup->rq;
-				for (i = rq->nr_sectors; i > 0;){
-					i -= rq->current_nr_sectors;
-					ide_end_request(1, hwgroup);
-				}
-				return;
-			}
-		}
-	}
-	ide_error(drive, "multwrite_intr", stat);
-}
-
-/*
- * Issue a simple drive command
- * The drive must be selected beforehand.
- */
-static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler)
-{
-	ide_set_handler (drive, handler, WAIT_CMD);
-	OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
-	OUT_BYTE(nsect,IDE_NSECTOR_REG);
-	OUT_BYTE(cmd,IDE_COMMAND_REG);
-}
-
-/*
- * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
- */
-static void set_multmode_intr (ide_drive_t *drive)
-{
-	byte stat = GET_STAT();
-
-	sti();
-	if (OK_STAT(stat,READY_STAT,BAD_STAT)) {
-		drive->mult_count = drive->mult_req;
-	} else {
-		drive->mult_req = drive->mult_count = 0;
-		drive->special.b.recalibrate = 1;
-		(void) ide_dump_status(drive, "set_multmode", stat);
-	}
-}
-
-/*
- * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
- */
-static void set_geometry_intr (ide_drive_t *drive)
-{
-	byte stat = GET_STAT();
-
-	sti();
-	if (!OK_STAT(stat,READY_STAT,BAD_STAT))
-		ide_error(drive, "set_geometry_intr", stat);
-}
-
-/*
- * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
- */
-static void recal_intr (ide_drive_t *drive)
-{
-	byte stat = GET_STAT();
-
-	sti();
-	if (!OK_STAT(stat,READY_STAT,BAD_STAT))
-		ide_error(drive, "recal_intr", stat);
-}
-
-/*
- * mc_intr() is invoked on completion of a WIN_ACKMC cmd.
- */
-static void mc_intr (ide_drive_t *drive)
-{
-	byte stat = GET_STAT();
-
-	sti();
-	if (!OK_STAT(stat,READY_STAT,BAD_STAT))
-		ide_error(drive, "mc_intr", stat);
-	drive->special.b.mc = 0;
-}
-
-/*
- * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
- */
-static void drive_cmd_intr (ide_drive_t *drive)
-{
-	struct request *rq = HWGROUP(drive)->rq;
-	byte *args = (byte *) rq->buffer;
-	byte stat = GET_STAT();
-
-	sti();
-	if ((stat & DRQ_STAT) && args && args[3]) {
-		byte io_32bit = drive->io_32bit;
-		drive->io_32bit = 0;
-		ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS);
-		drive->io_32bit = io_32bit;
-		stat = GET_STAT();
-	}
-	if (OK_STAT(stat,READY_STAT,BAD_STAT))
-		ide_end_drive_cmd (drive, stat, GET_ERR());
-	else
-		ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */
-}
-
-/*
- * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
- * commands to a drive.  It used to do much more, but has been scaled back.
- */
-static inline void do_special (ide_drive_t *drive)
-{
-	special_t *s = &drive->special;
-
-#ifdef DEBUG
-	printk("%s: do_special: 0x%02x\n", drive->name, s->all);
-#endif
-	if (s->b.set_geometry) {
-		s->b.set_geometry = 0;
-		if (drive->media == ide_disk && !drive->no_geom) {
-			OUT_BYTE(drive->sect,IDE_SECTOR_REG);
-			OUT_BYTE(drive->cyl,IDE_LCYL_REG);
-			OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG);
-			OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG);
-			if (!IS_PROMISE_DRIVE)
-				ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr);
-		}
-	} else if (s->b.recalibrate) {
-		s->b.recalibrate = 0;
-		if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
-			ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr);
-	} else if (s->b.set_tune) {
-		ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
-		s->b.set_tune = 0;
-		if (tuneproc != NULL)
-			tuneproc(drive, drive->tune_req);
-	} else if (s->b.set_multmode) {
-		s->b.set_multmode = 0;
-		if (drive->media == ide_disk) {
-			if (drive->id && drive->mult_req > drive->id->max_multsect)
-				drive->mult_req = drive->id->max_multsect;
-			if (!IS_PROMISE_DRIVE)
-				ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr);
-		} else
-			drive->mult_req = 0;
-	} else if (s->b.mc) {
-		s->b.mc = 0;
-		if (drive->media == ide_disk && !IS_PROMISE_DRIVE)
-			ide_cmd(drive, WIN_ACKMC, drive->sect, &mc_intr);
-	} else if (s->all) {
-		int special = s->all;
-		s->all = 0;
-		printk("%s: bad special flag: 0x%02x\n", drive->name, special);
-	}
-}
-
-/*
- * 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_drive_t *drive, byte good, byte bad, unsigned long timeout)
-{
-	byte stat;
-	unsigned long flags;
-
-	udelay(1);	/* spec allows drive 400ns to assert "BUSY" */
-	if ((stat = GET_STAT()) & BUSY_STAT) {
-		save_flags(flags);
-		sti();
-		timeout += jiffies;
-		while ((stat = GET_STAT()) & BUSY_STAT) {
-			if (jiffies > timeout) {
-				restore_flags(flags);
-				ide_error(drive, "status timeout", stat);
-				return 1;
-			}
-		}
-		restore_flags(flags);
-	}
-	udelay(1);	/* allow status to settle, then read it again */
-	if (OK_STAT((stat = GET_STAT()), good, bad))
-		return 0;
-	ide_error(drive, "status error", stat);
-	return 1;
-}
-
-/*
- * do_rw_disk() issues READ and WRITE commands to a disk,
- * using LBA if supported, or CHS otherwise, to address sectors.
- * It also takes care of issuing special DRIVE_CMDs.
- */
-static inline void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
-{
-	ide_hwif_t *hwif = HWIF(drive);
-	unsigned short io_base = hwif->io_base;
-#ifdef CONFIG_BLK_DEV_PROMISE
-	int use_promise_io = 0;
-#endif /* CONFIG_BLK_DEV_PROMISE */
-
-	OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
-	OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET);
-#ifdef CONFIG_BLK_DEV_PROMISE
-	if (IS_PROMISE_DRIVE) {
-		if (hwif->is_promise2 || rq->cmd == READ) {
-			use_promise_io = 1;
-		}
-	}
-	if (drive->select.b.lba || use_promise_io) {
-#else /* !CONFIG_BLK_DEV_PROMISE */
-	if (drive->select.b.lba) {
-#endif /* CONFIG_BLK_DEV_PROMISE */
-#ifdef DEBUG
-		printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
-			drive->name, (rq->cmd==READ)?"read":"writ",
-			block, rq->nr_sectors, (unsigned long) rq->buffer);
-#endif
-		OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET);
-		OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET);
-		OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET);
-		OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET);
-	} else {
-		unsigned int sect,head,cyl,track;
-		track = block / drive->sect;
-		sect  = block % drive->sect + 1;
-		OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET);
-		head  = track % drive->head;
-		cyl   = track / drive->head;
-		OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET);
-		OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET);
-		OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET);
-#ifdef DEBUG
-		printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
-			drive->name, (rq->cmd==READ)?"read":"writ", cyl,
-			head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
-#endif
-	}
-#ifdef CONFIG_BLK_DEV_PROMISE
-	if (use_promise_io) {
-		do_promise_io (drive, rq);
-		return;
-	}
-#endif /* CONFIG_BLK_DEV_PROMISE */
-	if (rq->cmd == READ) {
-#ifdef CONFIG_BLK_DEV_TRITON
-		if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive)))
-			return;
-#endif /* CONFIG_BLK_DEV_TRITON */
-		ide_set_handler(drive, &read_intr, WAIT_CMD);
-		OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET);
-		return;
-	}
-	if (rq->cmd == WRITE) {
-#ifdef CONFIG_BLK_DEV_TRITON
-		if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive)))
-			return;
-#endif /* CONFIG_BLK_DEV_TRITON */
-		OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET);
-		if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
-			printk("%s: no DRQ after issuing %s\n", drive->name,
-				drive->mult_count ? "MULTWRITE" : "WRITE");
-			return;
-		}
-		if (!drive->unmask)
-			cli();
-		if (drive->mult_count) {
-			HWGROUP(drive)->wrq = *rq; /* scratchpad */
-			ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
-			ide_multwrite(drive, drive->mult_count);
-		} else {
-			ide_set_handler (drive, &write_intr, WAIT_CMD);
-			ide_output_data(drive, rq->buffer, SECTOR_WORDS);
-		}
-		return;
-	}
-	printk("%s: bad command: %d\n", drive->name, rq->cmd);
-	ide_end_request(0, HWGROUP(drive));
-}
-
-/*
- * execute_drive_cmd() issues a special drive command,
- * usually initiated by ioctl() from the external hdparm program.
- */
-static void execute_drive_cmd (ide_drive_t *drive, struct request *rq)
-{
-	byte *args = rq->buffer;
-	if (args) {
-#ifdef DEBUG
-		printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
-		 drive->name, args[0], args[1], args[2], args[3]);
-#endif
-		OUT_BYTE(args[2],IDE_FEATURE_REG);
-		ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
-		return;
-	} else {
-		/*
-		 * NULL is actually a valid way of waiting for
-		 * all current requests to be flushed from the queue.
-		 */
-#ifdef DEBUG
-		printk("%s: DRIVE_CMD (null)\n", drive->name);
-#endif
-		ide_end_drive_cmd(drive, GET_STAT(), GET_ERR());
-		return;
-	}
-}
-
-/*
- * do_request() initiates handling of a new I/O request
- */
-static inline void do_request (ide_hwif_t *hwif, struct request *rq)
-{
-	unsigned int minor, unit;
-	unsigned long block, blockend;
-	ide_drive_t *drive;
-
-	sti();
-#ifdef DEBUG
-	printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq);
-#endif
-	minor = MINOR(rq->rq_dev);
-	unit = minor >> PARTN_BITS;
-	if (MAJOR(rq->rq_dev) != hwif->major || unit >= MAX_DRIVES) {
-		printk("%s: bad device number: %s\n",
-		       hwif->name, kdevname(rq->rq_dev));
-		goto kill_rq;
-	}
-	drive = &hwif->drives[unit];
-#ifdef DEBUG
-	if (rq->bh && !buffer_locked(rq->bh)) {
-		printk("%s: block not locked\n", drive->name);
-		goto kill_rq;
-	}
-#endif
-	block    = rq->sector;
-	blockend = block + rq->nr_sectors;
-	if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) {
-#ifdef MACH
-	  printk ("%s%c: bad access: block=%ld, count=%ld, blockend=%ld, nr_sects%ld\n",
-		  drive->name, (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ',
-		  block, rq->nr_sectors, blockend, drive->part[minor&PARTN_MASK].nr_sects);
-#else
-		printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
-		 (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors);
-#endif
-		goto kill_rq;
-	}
-	block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0;
-#if FAKE_FDISK_FOR_EZDRIVE
-	if (block == 0 && drive->remap_0_to_1)
-		block = 1;  /* redirect MBR access to EZ-Drive partn table */
-#endif /* FAKE_FDISK_FOR_EZDRIVE */
-	((ide_hwgroup_t *)hwif->hwgroup)->drive = drive;
-#if (DISK_RECOVERY_TIME > 0)
-	while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME);
-#endif
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
-	POLL_HWIF_TAPE_DRIVE;	/* macro from ide-tape.h */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
-	SELECT_DRIVE(hwif,drive);
-	if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
-		printk("%s: drive not ready for command\n", drive->name);
-		return;
-	}
-
-	if (!drive->special.all) {
-		if (rq->cmd == IDE_DRIVE_CMD) {
-			execute_drive_cmd(drive, rq);
-			return;
-		}
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-		switch (drive->media) {
-			case ide_disk:
-				do_rw_disk (drive, rq, block);
-				return;
-#ifdef CONFIG_BLK_DEV_IDECD
-			case ide_cdrom:
-				ide_do_rw_cdrom (drive, block);
-				return;
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-			case ide_tape:
-				idetape_do_request (drive, rq, block);
-				return;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-			case ide_floppy:
-				idefloppy_do_request (drive, rq, block);
-				return;
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-			case ide_scsi:
-				idescsi_do_request (drive, rq, block);
-				return;
-#endif /* CONFIG_BLK_DEV_IDESCSI */
-
-			default:
-				printk("%s: media type %d not supported\n",
-					drive->name, drive->media);
-				goto kill_rq;
-		}
-#else
-		do_rw_disk (drive, rq, block); /* simpler and faster */
-		return;
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-	}
-	do_special(drive);
-	return;
-kill_rq:
-	ide_end_request(0, hwif->hwgroup);
-}
-
-/*
- * The driver enables interrupts as much as possible.  In order to do this,
- * (a) the device-interrupt is always masked before entry, and
- * (b) the timeout-interrupt is always disabled before entry.
- *
- * If we enter here from, say irq14, and then start a new request for irq15,
- * (possible with "serialize" option) then we cannot ensure that we exit
- * before the irq15 hits us. So, we must be careful not to let this bother us.
- *
- * Interrupts are still masked (by default) whenever we are exchanging
- * data/cmds with a drive, because some drives seem to have very poor
- * tolerance for latency during I/O.  For devices which don't suffer from
- * this problem (most don't), the unmask flag can be set using the "hdparm"
- * utility, to permit other interrupts during data/cmd transfers.
- */
-void ide_do_request (ide_hwgroup_t *hwgroup)
-{
-	cli();	/* paranoia */
-	if (hwgroup->handler != NULL) {
-		printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name);
-		return;
-	}
-	do {
-		ide_hwif_t *hwif = hwgroup->hwif;
-		struct request *rq;
-		if ((rq = hwgroup->rq) == NULL) {
-			if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */
-				OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port);
-			/*
-			 * hwgroup->next_hwif is different from hwgroup->hwif
-			 * only when a request is inserted using "ide_next".
-			 * This saves wear and tear on IDE tapes.
-			 */
-			hwif = hwgroup->next_hwif;
-			do {
-				rq = blk_dev[hwif->major].current_request;
-				if (rq != NULL && rq->rq_status != RQ_INACTIVE)
-					goto got_rq;
-			} while ((hwif = hwif->next) != hwgroup->next_hwif);
-			hwgroup->active = 0;
-			return;		/* no work left for this hwgroup */
-		}
-	got_rq:
-		do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq);
-		cli();
-	} while (hwgroup->handler == NULL);
-}
-
-/*
- * do_hwgroup_request() invokes ide_do_request() after first masking
- * all possible interrupts for the current hwgroup.  This prevents race
- * conditions in the event that an unexpected interrupt occurs while
- * we are in the driver.
- *
- * Note that when an interrupt is used to reenter the driver, the first level
- * handler will already have masked the irq that triggered, but any other ones
- * for the hwgroup will still be unmasked.  The driver tries to be careful
- * about such things.
- */
-static void do_hwgroup_request (ide_hwgroup_t *hwgroup)
-{
-	if (hwgroup->handler == NULL) {
-		ide_hwif_t *hgif = hwgroup->hwif;
-		ide_hwif_t *hwif = hgif;
-		hwgroup->active = 1;
-		do {
-			disable_irq(hwif->irq);
-		} while ((hwif = hwif->next) != hgif);
-		ide_do_request (hwgroup);
-		do {
-			enable_irq(hwif->irq);
-		} while ((hwif = hwif->next) != hgif);
-	}
-}
-
-static void do_ide0_request (void)	/* invoked with cli() */
-{
-	do_hwgroup_request (ide_hwifs[0].hwgroup);
-}
-
-#if MAX_HWIFS > 1
-static void do_ide1_request (void)	/* invoked with cli() */
-{
-	do_hwgroup_request (ide_hwifs[1].hwgroup);
-}
-#endif
-
-#if MAX_HWIFS > 2
-static void do_ide2_request (void)	/* invoked with cli() */
-{
-	do_hwgroup_request (ide_hwifs[2].hwgroup);
-}
-#endif
-
-#if MAX_HWIFS > 3
-static void do_ide3_request (void)	/* invoked with cli() */
-{
-	do_hwgroup_request (ide_hwifs[3].hwgroup);
-}
-#endif
-
-static void timer_expiry (unsigned long data)
-{
-	ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
-	ide_drive_t   *drive   = hwgroup->drive;
-	unsigned long flags;
-
-	save_flags(flags);
-	cli();
-
-	if (hwgroup->poll_timeout != 0) { /* polling in progress? */
-		ide_handler_t *handler = hwgroup->handler;
-		hwgroup->handler = NULL;
-		handler(drive);
-	} else if (hwgroup->handler == NULL) {	 /* not waiting for anything? */
-		sti(); /* drive must have responded just as the timer expired */
-		printk("%s: marginal timeout\n", drive->name);
-	} else {
-		hwgroup->handler = NULL;	/* abort the operation */
-		if (hwgroup->hwif->dmaproc)
-			(void) hwgroup->hwif->dmaproc (ide_dma_abort, drive);
-		ide_error(drive, "irq timeout", GET_STAT());
-	}
-	if (hwgroup->handler == NULL)
-		do_hwgroup_request (hwgroup);
-	restore_flags(flags);
-}
-
-/*
- * There's nothing really useful we can do with an unexpected interrupt,
- * other than reading the status register (to clear it), and logging it.
- * There should be no way that an irq can happen before we're ready for it,
- * so we needn't worry much about losing an "important" interrupt here.
- *
- * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
- * drive enters "idle", "standby", or "sleep" mode, so if the status looks
- * "good", we just ignore the interrupt completely.
- *
- * This routine assumes cli() is in effect when called.
- *
- * If an unexpected interrupt happens on irq15 while we are handling irq14
- * and if the two interfaces are "serialized" (CMD640), then it looks like
- * we could screw up by interfering with a new request being set up for irq15.
- *
- * In reality, this is a non-issue.  The new command is not sent unless the
- * drive is ready to accept one, in which case we know the drive is not
- * trying to interrupt us.  And ide_set_handler() is always invoked before
- * completing the issuance of any new drive command, so we will not be
- * accidently invoked as a result of any valid command completion interrupt.
- *
- */
-static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
-{
-	byte stat;
-	unsigned int unit;
-	ide_hwif_t *hwif = hwgroup->hwif;
-
-	/*
-	 * handle the unexpected interrupt
-	 */
-	do {
-		if (hwif->irq == irq) {
-			for (unit = 0; unit < MAX_DRIVES; ++unit) {
-				ide_drive_t *drive = &hwif->drives[unit];
-				if (!drive->present)
-					continue;
-				SELECT_DRIVE(hwif,drive);
-				udelay(100);  /* Ugly, but wait_stat() may not be safe here */
-				if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)) {
-					/* Try to not flood the console with msgs */
-					static unsigned long last_msgtime = 0;
-					if ((last_msgtime + (HZ/2)) < jiffies) {
-						last_msgtime = jiffies;
-						(void) ide_dump_status(drive, "unexpected_intr", stat);
-					}
-				}
-				if ((stat & DRQ_STAT))
-					try_to_flush_leftover_data(drive);
-			}
-		}
-	} while ((hwif = hwif->next) != hwgroup->hwif);
-	SELECT_DRIVE(hwif,hwgroup->drive); /* Ugh.. probably interrupts current I/O */
-	udelay(100);  /* Ugly, but wait_stat() may not be safe here */
-}
-
-/*
- * entry point for all interrupts, caller does cli() for us
- */
-void ide_intr (int irq, void *dev_id, struct pt_regs *regs)
-{
-	ide_hwgroup_t *hwgroup = dev_id;
-	ide_handler_t *handler;
-
-	if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL) {
-		ide_drive_t *drive = hwgroup->drive;
-		hwgroup->handler = NULL;
-		del_timer(&(hwgroup->timer));
-		if (drive->unmask)
-			sti();
-		handler(drive);
-		cli();	/* this is necessary, as next rq may be different irq */
-		if (hwgroup->handler == NULL) {
-			SET_RECOVERY_TIMER(HWIF(drive));
- 			ide_do_request(hwgroup);
-		}
-	} else {
-		unexpected_intr(irq, hwgroup);
-	}
-	cli();
-}
-
-/*
- * get_info_ptr() returns the (ide_drive_t *) for a given device number.
- * It returns NULL if the given device number does not match any present drives.
- */
-static ide_drive_t *get_info_ptr (kdev_t i_rdev)
-{
-	int		major = MAJOR(i_rdev);
-	unsigned int	h;
-
-	for (h = 0; h < MAX_HWIFS; ++h) {
-		ide_hwif_t  *hwif = &ide_hwifs[h];
-		if (hwif->present && major == hwif->major) {
-			unsigned unit = DEVICE_NR(i_rdev);
-			if (unit < MAX_DRIVES) {
-				ide_drive_t *drive = &hwif->drives[unit];
-				if (drive->present)
-					return drive;
-			} else if (major == IDE0_MAJOR && unit < 4) {
-				printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit);
-				printk("ide: to fix it, run:  /usr/src/linux/scripts/MAKEDEV.ide\n");
-			}
-			break;
-		}
-	}
-	return NULL;
-}
-
-/*
- * This function is intended to be used prior to invoking ide_do_drive_cmd().
- */
-void ide_init_drive_cmd (struct request *rq)
-{
-	rq->buffer = NULL;
-	rq->cmd = IDE_DRIVE_CMD;
-	rq->sector = 0;
-	rq->nr_sectors = 0;
-	rq->current_nr_sectors = 0;
-	rq->sem = NULL;
-	rq->bh = NULL;
-	rq->bhtail = NULL;
-	rq->next = NULL;
-
-#if 0	/* these are done each time through ide_do_drive_cmd() */
-	rq->errors = 0;
-	rq->rq_status = RQ_ACTIVE;
-	rq->rq_dev = ????;
-#endif
-}
-
-/*
- * This function issues a special IDE device request
- * onto the request queue.
- *
- * If action is ide_wait, then the rq is queued at the end of the
- * request queue, and the function sleeps until it has been processed.
- * This is for use when invoked from an ioctl handler.
- *
- * If action is ide_preempt, then the rq is queued at the head of
- * the request queue, displacing the currently-being-processed
- * request and this function returns immediately without waiting
- * for the new rq to be completed.  This is VERY DANGEROUS, and is
- * intended for careful use by the ATAPI tape/cdrom driver code.
- *
- * If action is ide_next, then the rq is queued immediately after
- * the currently-being-processed-request (if any), and the function
- * returns without waiting for the new rq to be completed.  As above,
- * This is VERY DANGEROUS, and is intended for careful use by the
- * ATAPI tape/cdrom driver code.
- *
- * If action is ide_end, then the rq is queued at the end of the
- * request queue, and the function returns immediately without waiting
- * for the new rq to be completed. This is again intended for careful
- * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
- * when operating in the pipelined operation mode).
- */
-int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
-{
-	unsigned long flags;
-	unsigned int major = HWIF(drive)->major;
-	struct request *cur_rq;
-	struct blk_dev_struct *bdev = &blk_dev[major];
-	struct semaphore sem = MUTEX_LOCKED;
-
-	if (IS_PROMISE_DRIVE && rq->buffer != NULL)
-		return -ENOSYS;  /* special drive cmds not supported */
-	rq->errors = 0;
-	rq->rq_status = RQ_ACTIVE;
-	rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS);
-	if (action == ide_wait)
-		rq->sem = &sem;
-	unplug_device(bdev);
-
-	save_flags(flags);
-	cli();
-	if (action == ide_next)
-		HWGROUP(drive)->next_hwif = HWIF(drive);
-	cur_rq = bdev->current_request;
-
-	if (cur_rq == NULL || action == ide_preempt) {
-		rq->next = cur_rq;
-		bdev->current_request = rq;
-		if (action == ide_preempt)
-			HWGROUP(drive)->rq = NULL;
-	} else {
-		if (action == ide_wait || action == ide_end) {
-			while (cur_rq->next != NULL)	/* find end of list */
-				cur_rq = cur_rq->next;
-		}
-		rq->next = cur_rq->next;
-		cur_rq->next = rq;
-	}
-	if (!HWGROUP(drive)->active) {
-		do_hwgroup_request(HWGROUP(drive));
-		cli();
-	}
-	if (action == ide_wait  && rq->rq_status != RQ_INACTIVE)
-		down(&sem);	/* wait for it to be serviced */
-	restore_flags(flags);
-	return rq->errors ? -EIO : 0;	/* return -EIO if errors */
-}
-
-static int ide_open(struct inode * inode, struct file * filp)
-{
-	ide_drive_t *drive;
-	unsigned long flags;
-
-	if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
-		return -ENXIO;
-	save_flags(flags);
-	cli();
-	while (drive->busy)
-		sleep_on(&drive->wqueue);
-	drive->usage++;
-	restore_flags(flags);
-#ifdef CONFIG_BLK_DEV_IDECD
-	if (drive->media == ide_cdrom)
-		return ide_cdrom_open (inode, filp, drive);
-#endif	/* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-	if (drive->media == ide_tape)
-		return idetape_blkdev_open (inode, filp, drive);
-#endif	/* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-	if (drive->media == ide_floppy)
-		return idefloppy_open (inode, filp, drive);
-#endif	/* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-	if (drive->media == ide_scsi)
-		return idescsi_open (inode, filp, drive);
-#endif	/* CONFIG_BLK_DEV_IDESCSI */
-	if (drive->removable && drive->usage == 1) {
-		byte door_lock[] = {WIN_DOORLOCK,0,0,0};
-		struct request rq;
-		check_disk_change(inode->i_rdev);
-		ide_init_drive_cmd (&rq);
-		rq.buffer = door_lock;
-		/*
-		 * Ignore the return code from door_lock,
-		 * since the open() has already succeeded,
-		 * and the door_lock is irrelevant at this point.
-		 */
-		(void) ide_do_drive_cmd(drive, &rq, ide_wait);
-	}
-	return 0;
-}
-
-/*
- * Releasing a block device means we sync() it, so that it can safely
- * be forgotten about...
- */
-static void ide_release(struct inode * inode, struct file * file)
-{
-	ide_drive_t *drive;
-
-	if ((drive = get_info_ptr(inode->i_rdev)) != NULL) {
-		fsync_dev(inode->i_rdev);
-		drive->usage--;
-#ifdef CONFIG_BLK_DEV_IDECD
-		if (drive->media == ide_cdrom) {
-			ide_cdrom_release (inode, file, drive);
-			return;
-		}
-#endif	/* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-		if (drive->media == ide_tape) {
-			idetape_blkdev_release (inode, file, drive);
-			return;
-		}
-#endif	/* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-		if (drive->media == ide_floppy) {
-			idefloppy_release (inode, file, drive);
-			return;
-		}
-#endif	/* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-		if (drive->media == ide_scsi) {
-			idescsi_ide_release (inode, file, drive);
-			return;
-		}
-#endif	/* CONFIG_BLK_DEV_IDESCSI */
-		if (drive->removable && !drive->usage) {
-			byte door_unlock[] = {WIN_DOORUNLOCK,0,0,0};
-			struct request rq;
-			invalidate_buffers(inode->i_rdev);
-			ide_init_drive_cmd (&rq);
-			rq.buffer = door_unlock;
-			(void) ide_do_drive_cmd(drive, &rq, ide_wait);
-		}
-	}
-}
-
-/*
- * This routine is called to flush all partitions and partition tables
- * for a changed disk, and then re-read the new partition table.
- * If we are revalidating a disk because of a media change, then we
- * enter with usage == 0.  If we are using an ioctl, we automatically have
- * usage == 1 (we need an open channel to use an ioctl :-), so this
- * is our limit.
- */
-static int revalidate_disk(kdev_t i_rdev)
-{
-	ide_drive_t *drive;
-	unsigned int p, major, minor;
-	long flags;
-
-	if ((drive = get_info_ptr(i_rdev)) == NULL)
-		return -ENODEV;
-
-	major = MAJOR(i_rdev);
-	minor = drive->select.b.unit << PARTN_BITS;
-	save_flags(flags);
-	cli();
-	if (drive->busy || (drive->usage > 1)) {
-		restore_flags(flags);
-		return -EBUSY;
-	};
-	drive->busy = 1;
-	restore_flags(flags);
-
-	for (p = 0; p < (1<<PARTN_BITS); ++p) {
-		if (drive->part[p].nr_sects > 0) {
-			kdev_t devp = MKDEV(major, minor+p);
-			fsync_dev          (devp);
-			invalidate_inodes  (devp);
-			invalidate_buffers (devp);
-			set_blocksize(devp, 1024);
-		}
-		drive->part[p].start_sect = 0;
-		drive->part[p].nr_sects   = 0;
-	};
-
-	drive->part[0].nr_sects = current_capacity(drive);
-	if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects)
-		drive->part[0].start_sect = -1;
-	resetup_one_dev(HWIF(drive)->gd, drive->select.b.unit);
-
-	drive->busy = 0;
-	wake_up(&drive->wqueue);
-	return 0;
-}
-
-static int write_fs_long (unsigned long useraddr, long value)
-{
-	int err;
-
-	if (NULL == (long *)useraddr)
-		return -EINVAL;
-	if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long))))
-		return err;
-	put_user((unsigned)value, (long *) useraddr);
-	return 0;
-}
-
-static int ide_ioctl (struct inode *inode, struct file *file,
-			unsigned int cmd, unsigned long arg)
-{
-	int err;
-	ide_drive_t *drive;
-	unsigned long flags;
-	struct request rq;
-
-	if (!inode || !(inode->i_rdev))
-		return -EINVAL;
-	if ((drive = get_info_ptr(inode->i_rdev)) == NULL)
-		return -ENODEV;
-	ide_init_drive_cmd (&rq);
-	switch (cmd) {
-		case HDIO_GETGEO:
-		{
-			struct hd_geometry *loc = (struct hd_geometry *) arg;
-			if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
-#ifdef MACH
-			loc->heads = drive->bios_head;
-			loc->sectors = drive->bios_sect;
-			loc->cylinders = drive->bios_cyl;
-			loc->start
-			  = (drive->part[MINOR(inode->i_rdev)&PARTN_MASK]
-			     .start_sect);
-#else
-			err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
-			if (err) return err;
-			put_user(drive->bios_head, (byte *) &loc->heads);
-			put_user(drive->bios_sect, (byte *) &loc->sectors);
-			put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders);
-			put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
-				(unsigned long *) &loc->start);
-#endif
-			return 0;
-		}
-		case BLKFLSBUF:
-			if (!suser()) return -EACCES;
-			fsync_dev(inode->i_rdev);
-			invalidate_buffers(inode->i_rdev);
-			return 0;
-
-		case BLKRASET:
-			if (!suser()) return -EACCES;
-			if(arg > 0xff) return -EINVAL;
-			read_ahead[MAJOR(inode->i_rdev)] = arg;
-			return 0;
-
-		case BLKRAGET:
-			return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]);
-
-	 	case BLKGETSIZE:   /* Return device size */
-			return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects);
-		case BLKRRPART: /* Re-read partition tables */
-			if (!suser()) return -EACCES;
-			return revalidate_disk(inode->i_rdev);
-
-		case HDIO_GET_KEEPSETTINGS:
-			return write_fs_long(arg, drive->keep_settings);
-
-		case HDIO_GET_UNMASKINTR:
-			return write_fs_long(arg, drive->unmask);
-
-		case HDIO_GET_DMA:
-			return write_fs_long(arg, drive->using_dma);
-
-		case HDIO_GET_32BIT:
-			return write_fs_long(arg, drive->io_32bit);
-
-		case HDIO_GET_MULTCOUNT:
-			return write_fs_long(arg, drive->mult_count);
-
-		case HDIO_GET_IDENTITY:
-			if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK))
-				return -EINVAL;
-			if (drive->id == NULL)
-				return -ENOMSG;
-			err = verify_area(VERIFY_WRITE, (char *)arg, sizeof(*drive->id));
-			if (!err)
-				memcpy_tofs((char *)arg, (char *)drive->id, sizeof(*drive->id));
-			return err;
-
-			case HDIO_GET_NOWERR:
-			return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT);
-
-		case HDIO_SET_DMA:
-			if (!suser()) return -EACCES;
-#ifdef CONFIG_BLK_DEV_IDECD
-			if (drive->media == ide_cdrom)
-				return -EPERM;
-#endif /* CONFIG_BLK_DEV_IDECD */
-			if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc)
-				return -EPERM;
-		case HDIO_SET_KEEPSETTINGS:
-		case HDIO_SET_UNMASKINTR:
-		case HDIO_SET_NOWERR:
-			if (arg > 1)
-				return -EINVAL;
-		case HDIO_SET_32BIT:
-			if (!suser()) return -EACCES;
-			if ((MINOR(inode->i_rdev) & PARTN_MASK))
-				return -EINVAL;
-			save_flags(flags);
-			cli();
-			switch (cmd) {
-				case HDIO_SET_DMA:
-					if (!(HWIF(drive)->dmaproc)) {
-						restore_flags(flags);
-						return -EPERM;
-					}
-					drive->using_dma = arg;
-					break;
-				case HDIO_SET_KEEPSETTINGS:
-					drive->keep_settings = arg;
-					break;
-				case HDIO_SET_UNMASKINTR:
-					if (arg && drive->no_unmask) {
-						restore_flags(flags);
-						return -EPERM;
-					}
-					drive->unmask = arg;
-					break;
-				case HDIO_SET_NOWERR:
-					drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
-					break;
-				case HDIO_SET_32BIT:
-					if (arg > (1 + (SUPPORT_VLB_SYNC<<1))) {
-						restore_flags(flags);
-						return -EINVAL;
-					}
-					if (arg && drive->no_io_32bit) {
-						restore_flags(flags);
-						return -EPERM;
-					}
-					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 */
-					break;
-			}
-			restore_flags(flags);
-			return 0;
-
-		case HDIO_SET_MULTCOUNT:
-			if (!suser()) return -EACCES;
-			if (MINOR(inode->i_rdev) & PARTN_MASK)
-				return -EINVAL;
-			if (drive->id && arg > drive->id->max_multsect)
-				return -EINVAL;
-			save_flags(flags);
-			cli();
-			if (drive->special.b.set_multmode) {
-				restore_flags(flags);
-				return -EBUSY;
-			}
-			drive->mult_req = arg;
-			drive->special.b.set_multmode = 1;
-			restore_flags(flags);
-			(void) ide_do_drive_cmd (drive, &rq, ide_wait);
-			return (drive->mult_count == arg) ? 0 : -EIO;
-
-		case HDIO_DRIVE_CMD:
-		{
-			byte args[4], *argbuf = args;
-			int argsize = 4;
-			if (!suser() || securelevel > 0) return -EACCES;
-			if (NULL == (void *) arg) {
-				err = ide_do_drive_cmd(drive, &rq, ide_wait);
-			} else if (!(err = verify_area(VERIFY_READ,(void *)arg, 4))) {
-				memcpy_fromfs(args, (void *)arg, 4);
-				if (args[3]) {
-					argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
-					argbuf = kmalloc(argsize, GFP_KERNEL);
-					if (argbuf == NULL)
-						return -ENOMEM;
-					argbuf[0] = args[0];
-					argbuf[1] = args[1];
-					argbuf[2] = args[2];
-					argbuf[3] = args[3];
-				}
-				if (!(err = verify_area(VERIFY_WRITE,(void *)arg, argsize))) {
-					rq.buffer = argbuf;
-					err = ide_do_drive_cmd(drive, &rq, ide_wait);
-					memcpy_tofs((void *)arg, argbuf, argsize);
-				}
-				if (argsize > 4)
-					kfree(argbuf);
-			}
-			return err;
-		}
-		case HDIO_SET_PIO_MODE:
-			if (!suser()) return -EACCES;
-			if (MINOR(inode->i_rdev) & PARTN_MASK)
-				return -EINVAL;
-			if (!HWIF(drive)->tuneproc)
-				return -ENOSYS;
-			save_flags(flags);
-			cli();
-			if (drive->special.b.set_tune) {
-				restore_flags(flags);
-				return -EBUSY;
-			}
-			drive->tune_req = (byte) arg;
-			drive->special.b.set_tune = 1;
-			restore_flags(flags);
-			(void) ide_do_drive_cmd (drive, &rq, ide_wait);
-			return 0;
-
-		RO_IOCTLS(inode->i_rdev, arg);
-
-		default:
-#ifdef CONFIG_BLK_DEV_IDECD
-			if (drive->media == ide_cdrom)
-				return ide_cdrom_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-			if (drive->media == ide_tape)
-				return idetape_blkdev_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-			if (drive->media == ide_floppy)
-				return idefloppy_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-			if (drive->media == ide_scsi)
-				return idescsi_ioctl(drive, inode, file, cmd, arg);
-#endif /* CONFIG_BLK_DEV_IDESCSI */
-			return -EPERM;
-	}
-}
-
-static int ide_check_media_change (kdev_t i_rdev)
-{
-	ide_drive_t *drive;
-
-	if ((drive = get_info_ptr(i_rdev)) == NULL)
-		return -ENODEV;
-#ifdef CONFIG_BLK_DEV_IDECD
-	if (drive->media == ide_cdrom)
-		return ide_cdrom_check_media_change (drive);
-#endif	/* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-	if (drive->media == ide_floppy)
-		return idefloppy_media_change (drive);
-#endif	/* CONFIG_BLK_DEV_IDEFLOPPY */
-	if (drive->removable) /* for disks */
-		return 1;	/* always assume it was changed */
-	return 0;
-}
-
-void ide_fixstring (byte *s, const int bytecount, const int byteswap)
-{
-	byte *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';
-}
-
-static inline void do_identify (ide_drive_t *drive, byte cmd)
-{
-	int bswap;
-	struct hd_driveid *id;
-	unsigned long capacity, check;
-
-	id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_KERNEL);
-	ide_input_data(drive, id, SECTOR_WORDS);/* read 512 bytes of id info */
-	sti();
-
-#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
-	/*
-	 * EATA SCSI controllers do a hardware ATA emulation:
-	 * Ignore them if there is a driver for them available.
-	 */
-	if ((id->model[0] == 'P' && id->model[1] == 'M')
-	 || (id->model[0] == 'S' && id->model[1] == 'K')) {
-		printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
-		drive->present = 0;
-		return;
-	}
-#endif
-
-	/*
-	 *  WIN_IDENTIFY returns little-endian info,
-	 *  WIN_PIDENTIFY *usually* returns little-endian info.
-	 */
-	bswap = 1;
-	if (cmd == WIN_PIDENTIFY) {
-		if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
-		 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
-		 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
-			bswap = 0;	/* Vertos drives may still be weird */
-	}
-	ide_fixstring (id->model,     sizeof(id->model),     bswap);
-	ide_fixstring (id->fw_rev,    sizeof(id->fw_rev),    bswap);
-	ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap);
-
-	if (strstr(id->model, "E X A B Y T E N E S T"))
-		return;
-
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-	/*
-	 * Check for an ATAPI device
-	 */
-	if (cmd == WIN_PIDENTIFY) {
-		byte type = (id->config >> 8) & 0x1f;
-		printk("%s: %s, ATAPI ", drive->name, id->model);
-#ifdef CONFIG_BLK_DEV_PROMISE
-		if (HWIF(drive)->is_promise2) {
-			printk(" -- not supported on 2nd Promise port\n");
-			drive->present = 0;
-			return;
-		}
-#endif /* CONFIG_BLK_DEV_PROMISE */
-		if (!drive->ide_scsi) switch (type) {
-			case 0:
-				if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP"))
-					printk("cdrom or floppy?, assuming ");
-				if (drive->media != ide_cdrom && !strstr(id->model, "CD-ROM")) {
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-					printk("FLOPPY drive\n");
-					drive->media = ide_floppy;
-					if (idefloppy_identify_device(drive, id))
-						drive->present = 1;
-					return;
-#else
-					printk("FLOPPY ");
-					break;
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-				}
-				/* Early cdrom models used zero */
-			case 5:
-#ifdef CONFIG_BLK_DEV_IDECD
-				printk ("CDROM drive\n");
-				drive->media = ide_cdrom;
- 				drive->present = 1;
-				drive->removable = 1;
-				return;
-#else
-				printk ("CDROM ");
-				break;
-#endif /* CONFIG_BLK_DEV_IDECD */
-			case 1:
-#ifdef CONFIG_BLK_DEV_IDETAPE
-				printk ("TAPE drive");
-				if (idetape_identify_device (drive,id)) {
-					drive->media = ide_tape;
-					drive->present = 1;
-					drive->removable = 1;
-					if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) {
-						if (!HWIF(drive)->dmaproc(ide_dma_check, drive))
-							printk(", DMA");
-					}
-					printk("\n");
-				}
-				else {
-					drive->present = 0;
-					printk ("\nide-tape: the tape is not supported by this version of the driver\n");
-				}
-				return;
-#else
-				printk ("TAPE ");
-				break;
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-			default:
-				drive->present = 0;
-				printk("Type %d - Unknown device\n", type);
-				return;
-		}
-#ifdef CONFIG_BLK_DEV_IDESCSI
-		printk("drive - enabling SCSI emulation\n");
-		drive->media = ide_scsi;
-		drive->present = 1;
-		idescsi_setup(drive);
-#else
-		drive->present = 0;
-		printk("- not supported by this kernel\n");
-#endif /* CONFIG_BLK_DEV_IDESCSI */
-		return;
-	}
-#endif /* CONFIG_BLK_DEV_IDEATAPI */
-
-	/* check for removable disks (eg. SYQUEST), ignore 'WD' drives */
-	if (id->config & (1<<7)) {	/* removable disk ? */
-		if (id->model[0] != 'W' || id->model[1] != 'D')
-			drive->removable = 1;
-	}
-
-	/* SunDisk drives: treat as non-removable, force one unit */
-	if (id->model[0] == 'S' && id->model[1] == 'u') {
-		drive->removable = 0;
-		if (drive->select.all & (1<<4)) {
-		    drive->present = 0;
-		    return;
-		}
-	}
-
-	drive->media = ide_disk;
-	/* Extract geometry if we did not already have one for the drive */
-	if (!drive->present) {
-		drive->present = 1;
-		drive->cyl     = drive->bios_cyl  = id->cyls;
-		drive->head    = drive->bios_head = id->heads;
-		drive->sect    = drive->bios_sect = id->sectors;
-	}
-	/* Handle logical geometry translation by the drive */
-	if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads
-	 && (id->cur_heads <= 16) && id->cur_sectors)
-	{
-		/*
-		 * Extract the physical drive geometry for our use.
-		 * Note that we purposely do *not* update the bios info.
-		 * This way, programs that use it (like fdisk) will
-		 * still have the same logical view as the BIOS does,
-		 * which keeps the partition table from being screwed.
-		 *
-		 * An exception to this is the cylinder count,
-		 * which we reexamine later on to correct for 1024 limitations.
-		 */
-		drive->cyl  = id->cur_cyls;
-		drive->head = id->cur_heads;
-		drive->sect = id->cur_sectors;
-
-		/* check for word-swapped "capacity" field in id information */
-		capacity = drive->cyl * drive->head * drive->sect;
-		check = (id->cur_capacity0 << 16) | id->cur_capacity1;
-		if (check == capacity) {	/* was it swapped? */
-			/* yes, bring it into little-endian order: */
-			id->cur_capacity0 = (capacity >>  0) & 0xffff;
-			id->cur_capacity1 = (capacity >> 16) & 0xffff;
-		}
-	}
-	/* Use physical geometry if what we have still makes no sense */
-	if ((!drive->head || drive->head > 16) && id->heads && id->heads <= 16) {
-		drive->cyl  = id->cyls;
-		drive->head = id->heads;
-		drive->sect = id->sectors;
-	}
-
-	/* calculate drive capacity, and select LBA if possible */
-	capacity = current_capacity (drive);
-
-	/* Correct the number of cyls if the bios value is too small */
-        if (!drive->forced_geom &&
-            capacity > drive->bios_cyl * drive->bios_sect * drive->bios_head) {
-                unsigned long cylsize;
-                cylsize = drive->bios_sect * drive->bios_head;
-                if (cylsize == 0 || capacity/cylsize > 65535) {
-                        drive->bios_sect = 63;
-                        drive->bios_head = 255;
-                        cylsize = 63*255;
-                }
-                if (capacity/cylsize > 65535)
-                        drive->bios_cyl = 65535;
-                else
-                        drive->bios_cyl = capacity/cylsize;
-        }
-
-	if (!strncmp(id->model, "BMI ", 4) &&
-	    strstr(id->model, " ENHANCED IDE ") &&
-	    drive->select.b.lba)
-		drive->no_geom = 1;
-
-	printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d",
-	 drive->name, id->model, current_capacity(drive)/2048L, id->buf_size/2,
-	 drive->bios_cyl, drive->bios_head, drive->bios_sect);
-
-	drive->mult_count = 0;
-	if (id->max_multsect) {
-		drive->mult_req = INITIAL_MULT_COUNT;
-		if (drive->mult_req > id->max_multsect)
-			drive->mult_req = id->max_multsect;
-		if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
-			drive->special.b.set_multmode = 1;
-	}
-	if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) {
-		if (!(HWIF(drive)->dmaproc(ide_dma_check, drive))) {
-			if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7))
-				printk(", UDMA");
-			else
-				printk(", DMA");
-		}
-	}
-	printk("\n");
-}
-
-/*
- * Delay for *at least* 50ms.  As we don't know how much time is left
- * until the next tick occurs, we wait an extra tick to be safe.
- * This is used only during the probing/polling for drives at boot time.
- */
-static void delay_50ms (void)
-{
-	unsigned long timer = jiffies + ((HZ + 19)/20) + 1;
-	while (timer > jiffies);
-}
-
-/*
- * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
- * and waits for a response.  It also monitors irqs while this is
- * happening, in hope of automatically determining which one is
- * being used by the interface.
- *
- * Returns:	0  device was identified
- *		1  device timed-out (no response to identify request)
- *		2  device aborted the command (refused to identify itself)
- */
-static int try_to_identify (ide_drive_t *drive, byte cmd)
-{
-	int hd_status, rc;
-	unsigned long timeout;
-	unsigned long irqs_on = 0;
-	int irq_off;
-
-	if (!HWIF(drive)->irq) {		/* already got an IRQ? */
-		probe_irq_off(probe_irq_on());	/* clear dangling irqs */
-		irqs_on = probe_irq_on();	/* start monitoring irqs */
-		OUT_BYTE(drive->ctl,IDE_CONTROL_REG);	/* enable device irq */
-	}
-
-	delay_50ms();				/* take a deep breath */
-	if ((IN_BYTE(IDE_ALTSTATUS_REG) ^ IN_BYTE(IDE_STATUS_REG)) & ~INDEX_STAT) {
-		printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name);
-		hd_status = IDE_STATUS_REG;	/* ancient Seagate drives */
-	} else
-		hd_status = IDE_ALTSTATUS_REG;	/* use non-intrusive polling */
-
-#if CONFIG_BLK_DEV_PROMISE
-	if (IS_PROMISE_DRIVE) {
-		if (promise_cmd(drive,PROMISE_IDENTIFY)) {
-			if (irqs_on)
-				(void) probe_irq_off(irqs_on);
-			return 1;
-		}
-	} else
-#endif /* CONFIG_BLK_DEV_PROMISE */
-		OUT_BYTE(cmd,IDE_COMMAND_REG);		/* ask drive for ID */
-	timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
-	timeout += jiffies;
-	do {
-		if (jiffies > timeout) {
-			if (irqs_on)
-				(void) probe_irq_off(irqs_on);
-			return 1;	/* drive timed-out */
-		}
-		delay_50ms();		/* give drive a breather */
-	} while (IN_BYTE(hd_status) & BUSY_STAT);
-
-	delay_50ms();		/* wait for IRQ and DRQ_STAT */
-	if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) {
-		unsigned long flags;
-		save_flags(flags);
-		cli();			/* some systems need this */
-		do_identify(drive, cmd); /* drive returned ID */
-		rc = 0;			/* drive responded with ID */
-		(void) GET_STAT();	/* clear drive IRQ */
-		restore_flags(flags);
-	} else
-		rc = 2;			/* drive refused ID */
-	if (!HWIF(drive)->irq) {
-		irq_off = probe_irq_off(irqs_on);	/* get our irq number */
-		if (irq_off > 0) {
-			HWIF(drive)->irq = irq_off; /* save it for later */
-			irqs_on = probe_irq_on();
-			OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */
-			udelay(5);
-			(void) probe_irq_off(irqs_on);
-			(void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */
-			(void) GET_STAT();	/* clear drive IRQ */
-
-		} else {	/* Mmmm.. multiple IRQs.. don't know which was ours */
-			printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off);
-#ifdef CONFIG_BLK_DEV_CMD640
-#ifdef CMD640_DUMP_REGS
-			if (HWIF(drive)->chipset == ide_cmd640) {
-				printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
-				CMD640_DUMP_REGS;
-			}
-#endif /* CMD640_DUMP_REGS */
-#endif /* CONFIG_BLK_DEV_CMD640 */
-		}
-	}
-	return rc;
-}
-
-/*
- * do_probe() has the difficult job of finding a drive if it exists,
- * without getting hung up if it doesn't exist, without trampling on
- * ethernet cards, and without leaving any IRQs dangling to haunt us later.
- *
- * If a drive is "known" to exist (from CMOS or kernel parameters),
- * but does not respond right away, the probe will "hang in there"
- * for the maximum wait time (about 30 seconds), otherwise it will
- * exit much more quickly.
- *
- * Returns:	0  device was identified
- *		1  device timed-out (no response to identify request)
- *		2  device aborted the command (refused to identify itself)
- *		3  bad status from device (possible for ATAPI drives)
- *		4  probe was not attempted because failure was obvious
- */
-static int do_probe (ide_drive_t *drive, byte cmd)
-{
-	int rc;
-	ide_hwif_t *hwif = HWIF(drive);
-	unsigned long timeout;
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-	if (drive->present) {	/* avoid waiting for inappropriate probes */
-		if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
-			return 4;
-	}
-#endif	/* CONFIG_BLK_DEV_IDEATAPI */
-#ifdef DEBUG
-	printk("probing for %s: present=%d, media=%d, probetype=%s\n",
-		drive->name, drive->present, drive->media,
-		(cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
-#endif
-	SELECT_DRIVE(hwif,drive);
-	delay_50ms();
-	if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) {
-		OUT_BYTE(0xa0,IDE_SELECT_REG);	/* exit with drive0 selected */
-		delay_50ms();		/* allow BUSY_STAT to assert & clear */
-		return 3;    /* no i/f present: avoid killing ethernet cards */
-	}
-
-	if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT)
-	 || drive->present || cmd == WIN_PIDENTIFY)
-	{
-		if ((rc = try_to_identify(drive,cmd)))   /* send cmd and wait */
-			rc = try_to_identify(drive,cmd); /* failed: try again */
-		if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) {
-			printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT());
-			delay_50ms();
-			OUT_BYTE (drive->select.all, IDE_SELECT_REG);
-			delay_50ms();
-			OUT_BYTE(WIN_SRST, IDE_COMMAND_REG);
-			timeout = jiffies;
-			while ((GET_STAT() & BUSY_STAT) && jiffies < timeout + WAIT_WORSTCASE)
-				delay_50ms();
-			rc = try_to_identify(drive, cmd);
-		}
-		if (rc == 1)
-			printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT());
-		(void) GET_STAT();		/* ensure drive irq is clear */
-	} else {
-		rc = 3;				/* not present or maybe ATAPI */
-	}
-	if (drive->select.b.unit != 0) {
-		OUT_BYTE(0xa0,IDE_SELECT_REG);	/* exit with drive0 selected */
-		delay_50ms();
-		(void) GET_STAT();		/* ensure drive irq is clear */
-	}
-	return rc;
-}
-
-static void enable_nest (ide_drive_t *drive)
-{
-	unsigned long timeout;
-
-	printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model);
-	SELECT_DRIVE(HWIF(drive), drive);
-	delay_50ms();
-	OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG);
-	timeout = jiffies + WAIT_WORSTCASE;
-	do {
-		if (jiffies > timeout) {
-			printk("failed (timeout)\n");
-			return;
-		}
-		delay_50ms();
-	} while (GET_STAT() & BUSY_STAT);
-	delay_50ms();
-	if (!OK_STAT(GET_STAT(), 0, BAD_STAT))
-		printk("failed (status = 0x%02x)\n", GET_STAT());
-	else
-		printk("success\n");
-	if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-		(void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
-#endif	/* CONFIG_BLK_DEV_IDEATAPI */
-	}
-}
-
-/*
- * probe_for_drive() tests for existence of a given drive using do_probe().
- *
- * Returns:	0  no device was found
- *		1  device was found (note: drive->present might still be 0)
- */
-static inline byte probe_for_drive (ide_drive_t *drive)
-{
-	if (drive->noprobe)			/* skip probing? */
-		return drive->present;
-	if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */
-#ifdef CONFIG_BLK_DEV_IDEATAPI
-		(void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */
-#endif	/* CONFIG_BLK_DEV_IDEATAPI */
-	}
-	if (drive->id && strstr(drive->id->model, "E X A B Y T E N E S T"))
-		enable_nest(drive);
-	if (!drive->present)
-		return 0;			/* drive not found */
-	if (drive->id == NULL) {		/* identification failed? */
-		if (drive->media == ide_disk) {
-			printk ("%s: non-IDE drive, CHS=%d/%d/%d\n",
-			 drive->name, drive->cyl, drive->head, drive->sect);
-		}
-#ifdef CONFIG_BLK_DEV_IDECD
-		else if (drive->media == ide_cdrom) {
-			printk("%s: ATAPI cdrom (?)\n", drive->name);
-		}
-#endif	/* CONFIG_BLK_DEV_IDECD */
-		else {
-			drive->present = 0;	/* nuke it */
-		}
-	}
-	return 1;	/* drive was found */
-}
-
-/*
- * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc
- * controller that is BIOS compatible with ST-506, and thus showing up in our
- * BIOS table, but not register compatible, and therefore not present in CMOS.
- *
- * Furthermore, we will assume that our ST-506 drives <if any> are the primary
- * drives in the system -- the ones reflected as drive 1 or 2.  The first
- * drive is stored in the high nibble of CMOS byte 0x12, the second in the low
- * nibble.  This will be either a 4 bit drive type or 0xf indicating use byte
- * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS.  A non-zero value
- * means we have an AT controller hard disk for that drive.
- *
- * Of course, there is no guarantee that either drive is actually on the
- * "primary" IDE interface, but we don't bother trying to sort that out here.
- * If a drive is not actually on the primary interface, then these parameters
- * will be ignored.  This results in the user having to supply the logical
- * drive geometry as a boot parameter for each drive not on the primary i/f.
- *
- * The only "perfect" way to handle this would be to modify the setup.[cS] code
- * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info
- * for us during initialization.  I have the necessary docs -- any takers?  -ml
- */
-static void probe_cmos_for_drives (ide_hwif_t *hwif)
-{
-#ifdef __i386__
-	extern struct drive_info_struct drive_info;
-	byte cmos_disks, *BIOS = (byte *) &drive_info;
-	int unit;
-
-#ifdef CONFIG_BLK_DEV_PROMISE
-	if (hwif->is_promise2)
-		return;
-#endif /* CONFIG_BLK_DEV_PROMISE */
-	outb_p(0x12,0x70);		/* specify CMOS address 0x12 */
-	cmos_disks = inb_p(0x71);	/* read the data from 0x12 */
-	/* Extract drive geometry from CMOS+BIOS if not already setup */
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
-		if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) {
-			drive->cyl   = drive->bios_cyl  = *(unsigned short *)BIOS;
-			drive->head  = drive->bios_head = *(BIOS+2);
-			drive->sect  = drive->bios_sect = *(BIOS+14);
-			drive->ctl   = *(BIOS+8);
-			drive->present = 1;
-		}
-		BIOS += 16;
-	}
-#endif
-}
-
-/*
- * This routine only knows how to look for drive units 0 and 1
- * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
- */
-static void probe_hwif (ide_hwif_t *hwif)
-{
-	unsigned int unit;
-
-	if (hwif->noprobe)
-		return;
-	if (hwif->io_base == HD_DATA)
-		probe_cmos_for_drives (hwif);
-#if CONFIG_BLK_DEV_PROMISE
-	if (!hwif->is_promise2 &&
-	   (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) {
-#else
-	if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) {
-#endif /* CONFIG_BLK_DEV_PROMISE */
-		int msgout = 0;
-		for (unit = 0; unit < MAX_DRIVES; ++unit) {
-			ide_drive_t *drive = &hwif->drives[unit];
-			if (drive->present) {
-				drive->present = 0;
-				printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name);
-				msgout = 1;
-			}
-		}
-		if (!msgout)
-			printk("%s: ports already in use, skipping probe\n", hwif->name);
-	} else {
-		unsigned long flags;
-		save_flags(flags);
-
-		sti();	/* needed for jiffies and irq probing */
-		/*
-		 * Second drive should only exist if first drive was found,
-		 * but a lot of cdrom drives are configured as single slaves.
-		 */
-		for (unit = 0; unit < MAX_DRIVES; ++unit) {
-			ide_drive_t *drive = &hwif->drives[unit];
-			(void) probe_for_drive (drive);
-			if (drive->present && drive->media == ide_disk) {
-				if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
-					printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
-					 drive->name, drive->head);
-					drive->present = 0;
-				}
-			}
-			if (drive->present && !hwif->present) {
-				hwif->present = 1;
-				request_region(hwif->io_base,  8, hwif->name);
-				request_region(hwif->ctl_port, 1, hwif->name);
-			}
-		}
-		restore_flags(flags);
-		for (unit = 0; unit < MAX_DRIVES; ++unit) {
-			ide_drive_t *drive = &hwif->drives[unit];
-			if (drive->present && drive->media != ide_tape) {
-				ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc;
-				if (tuneproc != NULL && drive->autotune == 1)
-					tuneproc(drive, 255);	/* auto-tune PIO mode */
-			}
-		}
-	}
-}
-
-/*
- * stridx() returns the offset of c within s,
- * or -1 if c is '\0' or not found within s.
- */
-static int 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 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;
-		}
-		if (!*s)
-			return n;
-	}
-	return 0;	/* zero = nothing matched */
-}
-
-/*
- * ide_setup() gets called VERY EARLY during initialization,
- * to handle kernel "command line" strings beginning with "hdx="
- * or "ide".  Here is the complete set currently supported:
- *
- * "hdx="  is recognized for all "x" from "a" to "h", such as "hdc".
- * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
- *
- * "hdx=noprobe"	: drive may be present, but do not probe for it
- * "hdx=none"		: drive is NOT present, ignore cmos and do not probe
- * "hdx=nowerr"		: ignore the WRERR_STAT bit on this drive
- * "hdx=cdrom"		: drive is present, and is a cdrom drive
- * "hdx=cyl,head,sect"	: disk drive is present, with specified geometry
- * "hdx=autotune"	: driver will attempt to tune interface speed
- *				to the fastest PIO mode supported,
- *				if possible for this drive only.
- *				Not fully supported by all chipset types,
- *				and quite likely to cause trouble with
- *				older/odd IDE drives.
- *
- * "idebus=xx"		: inform IDE driver of VESA/PCI bus speed in Mhz,
- *				where "xx" is between 20 and 66 inclusive,
- *				used when tuning chipset PIO modes.
- *				For PCI bus, 25 is correct for a P75 system,
- *				30 is correct for P90,P120,P180 systems,
- *				and 33 is used for P100,P133,P166 systems.
- *				If in doubt, use idebus=33 for PCI.
- *				As for VLB, it is safest to not specify it.
- *
- * "idex=noprobe"	: do not attempt to access/use this interface
- * "idex=base"		: probe for an interface at the addr specified,
- *				where "base" is usually 0x1f0 or 0x170
- *				and "ctl" is assumed to be "base"+0x206
- * "idex=base,ctl"	: specify both base and ctl
- * "idex=base,ctl,irq"	: specify base, ctl, and irq number
- * "idex=autotune"	: driver will attempt to tune interface speed
- *				to the fastest PIO mode supported,
- *				for all drives on this interface.
- *				Not fully supported by all chipset types,
- *				and quite likely to cause trouble with
- *				older/odd IDE drives.
- * "idex=noautotune"	: driver will NOT attempt to tune interface speed
- *				This is the default for most chipsets,
- *				except the cmd640.
- * "idex=serialize"	: do not overlap operations on idex and ide(x^1)
- *
- * The following are valid ONLY on ide0,
- * and the defaults for the base,ctl ports must not be altered.
- *
- * "ide0=dtc2278"	: probe/support DTC2278 interface
- * "ide0=ht6560b"	: probe/support HT6560B interface
- * "ide0=cmd640_vlb"	: *REQUIRED* for VLB cards with the CMD640 chip
- *			  (not for PCI -- automatically detected)
- * "ide0=qd6580"	: probe/support qd6580 interface
- * "ide0=ali14xx"	: probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
- * "ide0=umc8672"	: probe/support umc8672 chipsets
- */
-void 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);
-
-	printk("ide_setup: %s", s);
-	init_ide_data ();
-
-	/*
-	 * 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",
-				"slow", "ide-scsi", NULL};
-		unit = s[2] - 'a';
-		hw   = unit / MAX_DRIVES;
-		unit = unit % MAX_DRIVES;
-		hwif = &ide_hwifs[hw];
-		drive = &hwif->drives[unit];
-		switch (match_parm(&s[3], hd_words, vals, 3)) {
-			case -1: /* "none" */
-				drive->nobios = 1;  /* drop into "noprobe" */
-			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;
-				hwif->noprobe = 0;
-				goto done;
-			case -5: /* "serialize" */
-				printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
-				goto do_serialize;
-			case -6: /* "autotune" */
-				drive->autotune = 1;
-				goto done;
-			case -7: /* "noautotune" */
-				drive->autotune = 2;
-				goto done;
-			case -8: /* "slow" */
-				drive->slow = 1;
-				goto done;
-			case -9: /* "ide-scsi" */
-				drive->ide_scsi = 1;
-				goto done;
-			case 3: /* cyl,head,sect */
-				drive->media	= ide_disk;
-				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
-		 */
-		const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune",
-			"qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", 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:
-		 */
-		if (i > 0 || i <= -5) {
-			if (hwif->chipset != ide_unknown)
-				goto bad_option;
-			if (i <= -5) {
-				if (ide_hwifs[1].chipset != ide_unknown)
-					goto bad_option;
-				/*
-				 * Interface keywords work only for ide0:
-				 */
-				if (hw != 0)
-					goto bad_hwif;
-			}
-		}
-
-		switch (i) {
-#ifdef CONFIG_BLK_DEV_PROMISE
-			case -11: /* "dc4030" */
-			{
-				setup_dc4030(hwif);
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_PROMISE */
-#ifdef CONFIG_BLK_DEV_ALI14XX
-			case -10: /* "ali14xx" */
-			{
-				extern void init_ali14xx (void);
-				init_ali14xx();
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_ALI14XX */
-#ifdef CONFIG_BLK_DEV_UMC8672
-			case -9: /* "umc8672" */
-			{
-				extern void init_umc8672 (void);
-				init_umc8672();
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_UMC8672 */
-#ifdef CONFIG_BLK_DEV_DTC2278
-			case -8: /* "dtc2278" */
-			{
-				extern void init_dtc2278 (void);
-				init_dtc2278();
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_DTC2278 */
-#ifdef CONFIG_BLK_DEV_CMD640
-			case -7: /* "cmd640_vlb" */
-			{
-				extern int cmd640_vlb; /* flag for cmd640.c */
-				cmd640_vlb = 1;
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_CMD640 */
-#ifdef CONFIG_BLK_DEV_HT6560B
-			case -6: /* "ht6560b" */
-			{
-				extern void init_ht6560b (void);
-				init_ht6560b();
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_HT6560B */
-#if CONFIG_BLK_DEV_QD6580
-			case -5: /* "qd6580" (has secondary i/f) */
-			{
-				extern void init_qd6580 (void);
-				init_qd6580();
-				goto done;
-			}
-#endif /* CONFIG_BLK_DEV_QD6580 */
-			case -4: /* "noautotune" */
-				hwif->drives[0].autotune = 2;
-				hwif->drives[1].autotune = 2;
-				goto done;
-			case -3: /* "autotune" */
-				hwif->drives[0].autotune = 1;
-				hwif->drives[1].autotune = 1;
-				goto done;
-			case -2: /* "serialize" */
-			do_serialize:
-				ide_hwifs[hw].serialized = 1;   /* serialize */
-				ide_hwifs[hw^1].serialized = 1; /* with mate */
-				goto done;
-
-			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->io_base  = vals[0];
-				hwif->ctl_port = vals[1];
-				hwif->irq      = vals[2];
-				hwif->noprobe  = 0;
-				hwif->chipset  = ide_generic;
-				goto done;
-
-			case 0: goto bad_option;
-			default:
-				printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
-				return;
-		}
-	}
-bad_option:
-	printk(" -- BAD OPTION\n");
-	return;
-bad_hwif:
-	printk("-- NOT SUPPORTED ON ide%d", hw);
-done:
-	printk("\n");
-}
-
-/*
- * This routine is called from the partition-table code in genhd.c
- * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
- *
- * The second parameter, "xparm", determines exactly how the translation
- * will be handled:
- *		 0 = convert to CHS with fewer than 1024 cyls
- *			using the same method as Ontrack DiskManager.
- *		 1 = same as "0", plus offset everything by 63 sectors.
- *		-1 = similar to "0", plus redirect sector 0 to sector 1.
- *		>1 = convert to a CHS geometry with "xparm" heads.
- *
- * Returns 0 if the translation was not possible, if the device was not
- * an IDE disk drive, or if a geometry was "forced" on the commandline.
- * Returns 1 if the geometry translation was successful.
- */
-int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg)
-{
-	ide_drive_t *drive;
-	static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0};
-	const byte *heads = head_vals;
-	unsigned long tracks;
-
-	if ((drive = get_info_ptr(i_rdev)) == NULL || drive->forced_geom)
-		return 0;
-
-	if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63)
-		return 0;		/* we already have a translation */
-
-	printk("%s ", msg);
-
-	if (drive->id) {
-		drive->cyl  = drive->id->cyls;
-		drive->head = drive->id->heads;
-		drive->sect = drive->id->sectors;
-	}
-	drive->bios_cyl  = drive->cyl;
-	drive->bios_head = drive->head;
-	drive->bios_sect = drive->sect;
-	drive->special.b.set_geometry = 1;
-
-	tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63;
-	drive->bios_sect = 63;
-	if (xparm > 1) {
-		drive->bios_head = xparm;
-		drive->bios_cyl = tracks / drive->bios_head;
-	} else {
-		while (drive->bios_cyl >= 1024) {
-			drive->bios_head = *heads;
-			drive->bios_cyl = tracks / drive->bios_head;
-			if (0 == *++heads)
-				break;
-		}
-#if FAKE_FDISK_FOR_EZDRIVE
-		if (xparm == -1) {
-			drive->remap_0_to_1 = 1;
-			msg = "0->1";
-		} else
-#endif /* FAKE_FDISK_FOR_EZDRIVE */
-		if (xparm == 1) {
-			drive->sect0 = 63;
-			drive->bios_cyl = (tracks - 1) / drive->bios_head;
-			msg = "+63";
-		}
-		printk("[remap %s] ", msg);
-	}
-	drive->part[0].nr_sects = current_capacity(drive);
-	printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect);
-	return 1;
-}
-
-#if MAX_HWIFS > 1
-/*
- * save_match() is used to simplify logic in init_irq() below.
- *
- * A loophole here is that we may not know about a particular
- * hwif's irq until after that hwif is actually probed/initialized..
- * This could be a problem for the case where an hwif is on a
- * dual interface that requires serialization (eg. cmd640) and another
- * hwif using one of the same irqs is initialized beforehand.
- *
- * This routine detects and reports such situations, but does not fix them.
- */
-static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
-{
-	ide_hwif_t *m = *match;
-
-	if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
-		if (!new->hwgroup)
-			return;
-		printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name);
-	}
-	if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
-		*match = new;
-}
-#endif /* MAX_HWIFS > 1 */
-
-/*
- * This routine sets up the irq for an ide interface, and creates a new
- * hwgroup for the irq/hwif if none was previously assigned.
- *
- * Much of the code is for correctly detecting/handling irq sharing
- * and irq serialization situations.  This is somewhat complex because
- * it handles static as well as dynamic (PCMCIA) IDE interfaces.
- *
- * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
- * interrupts completely disabled.  This can be bad for interrupt latency,
- * but anything else has led to problems on some machines.  We re-enable
- * interrupts as much as we can safely do in most places.
- */
-static int init_irq (ide_hwif_t *hwif)
-{
-	unsigned long flags;
-#if MAX_HWIFS > 1
-	unsigned int index;
-#endif /* MAX_HWIFS > 1 */
-	ide_hwgroup_t *hwgroup;
-	ide_hwif_t *match = NULL;
-
-	save_flags(flags);
-	cli();
-
-	hwif->hwgroup = NULL;
-#if MAX_HWIFS > 1
-	/*
-	 * Group up with any other hwifs that share our irq(s).
-	 */
-	for (index = 0; index < MAX_HWIFS; index++) {
-		ide_hwif_t *h = &ide_hwifs[index];
-		if (h->hwgroup) {  /* scan only initialized hwif's */
-			if (hwif->irq == h->irq) {
-				hwif->sharing_irq = h->sharing_irq = 1;
-				save_match(hwif, h, &match);
-			}
-			if (hwif->serialized) {
-				ide_hwif_t *mate = &ide_hwifs[hwif->index^1];
-				if (index == mate->index || h->irq == mate->irq)
-					save_match(hwif, h, &match);
-			}
-			if (h->serialized) {
-				ide_hwif_t *mate = &ide_hwifs[h->index^1];
-				if (hwif->irq == mate->irq)
-					save_match(hwif, h, &match);
-			}
-		}
-	}
-#endif /* MAX_HWIFS > 1 */
-	/*
-	 * If we are still without a hwgroup, then form a new one
-	 */
-	if (match) {
-		hwgroup = match->hwgroup;
-	} else {
-		hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL);
-		hwgroup->hwif 	 = hwgroup->next_hwif = hwif->next = hwif;
-		hwgroup->rq      = NULL;
-		hwgroup->handler = NULL;
-		if (hwif->drives[0].present)
-			hwgroup->drive = &hwif->drives[0];
-		else
-			hwgroup->drive = &hwif->drives[1];
-		hwgroup->poll_timeout = 0;
-		hwgroup->active = 0;
-		init_timer(&hwgroup->timer);
-		hwgroup->timer.function = &timer_expiry;
-		hwgroup->timer.data = (unsigned long) hwgroup;
-	}
-
-	/*
-	 * Allocate the irq, if not already obtained for another hwif
-	 */
-	if (!match || match->irq != hwif->irq) {
-		if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT, hwif->name, hwgroup)) {
-			if (!match)
-				kfree(hwgroup);
-			restore_flags(flags);
-			return 1;
-		}
-	}
-
-	/*
-	 * Everything is okay, so link us into the hwgroup
-	 */
-	hwif->hwgroup = hwgroup;
-	hwif->next = hwgroup->hwif->next;
-	hwgroup->hwif->next = hwif;
-
-	restore_flags(flags);	/* safe now that hwif->hwgroup is set up */
-
-	printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name,
-		hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq);
-	if (match)
-		printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name);
-	printk("\n");
-	return 0;
-}
-
-static struct file_operations ide_fops = {
-	NULL,			/* lseek - default */
-	block_read,		/* read - general block-dev read */
-	block_write,		/* write - general block-dev write */
-	NULL,			/* readdir - bad */
-	NULL,			/* select */
-	ide_ioctl,		/* ioctl */
-	NULL,			/* mmap */
-	ide_open,		/* open */
-	ide_release,		/* release */
-	block_fsync		/* fsync */
-	,NULL,			/* fasync */
-	ide_check_media_change,	/* check_media_change */
-	revalidate_disk		/* revalidate */
-};
-
-#ifdef CONFIG_PCI
-#if defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON)
-
-typedef void (ide_pci_init_proc_t)(byte, byte);
-
-/*
- * ide_probe_pci() scans PCI for a specific vendor/device function,
- * and invokes the supplied init routine for each instance detected.
- */
-static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj)
-{
-	unsigned long flags;
-	unsigned index;
-	byte fn, bus;
-
-	save_flags(flags);
-	cli();
-	for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) {
-		init (bus, fn + func_adj);
-	}
-	restore_flags(flags);
-}
-
-#endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */
-
-static void ide_probe_promise_20246(void)
-{
-	byte fn, bus;
-	unsigned short io[6], count = 0;
-	unsigned int reg, tmp, i;
-	ide_hwif_t *hwif;
-
-	memset(io, 0, 6 * sizeof(unsigned short));
-	if (pcibios_find_device(PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, 0, &bus, &fn))
-		return;
-	printk("ide: Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d\n", bus, fn);
-	for (reg = PCI_BASE_ADDRESS_0; reg <= PCI_BASE_ADDRESS_5; reg += 4) {
-		pcibios_read_config_dword(bus, fn, reg, &tmp);
-		if (tmp & PCI_BASE_ADDRESS_SPACE_IO)
-			io[count++] = tmp & PCI_BASE_ADDRESS_IO_MASK;
-	}
-	for (i = 2; i < 4; i++) {
-		hwif = ide_hwifs + i;
-		if (hwif->chipset == ide_generic) {
-			printk("ide%d: overridden with command line parameter\n", i);
-			return;
-		}
-		tmp = (i - 2) * 2;
-		if (!io[tmp] || !io[tmp + 1]) {
-			printk("ide%d: invalid port address %x, %x -- aborting\n", i, io[tmp], io[tmp + 1]);
-			return;
-		}
-		hwif->io_base = io[tmp];
-		hwif->ctl_port = io[tmp + 1] + 2;
-		hwif->noprobe = 0;
-	}
-#ifdef CONFIG_BLK_DEV_TRITON
-	ide_init_promise (bus, fn, &ide_hwifs[2], &ide_hwifs[3], io[4]);
-#endif /* CONFIG_BLK_DEV_TRITON */
-}
-
-#endif /* CONFIG_PCI */
-
-/*
- * ide_init_pci() finds/initializes "known" PCI IDE interfaces
- *
- * This routine should ideally be using pcibios_find_class() to find
- * all IDE interfaces, but that function causes some systems to "go weird".
- */
-static void probe_for_hwifs (void)
-{
-#ifdef CONFIG_PCI
-	/*
-	 * Find/initialize PCI IDE interfaces
-	 */
-	if (pcibios_present()) {
-#ifdef CONFIG_BLK_DEV_RZ1000
-		ide_pci_init_proc_t init_rz1000;
-		ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, &init_rz1000, 0);
-		ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, &init_rz1000, 0);
-#endif /* CONFIG_BLK_DEV_RZ1000 */
-#ifdef CONFIG_BLK_DEV_TRITON
-		/*
-		 * Apparently the BIOS32 services on Intel motherboards are
-		 * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us.
-		 * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0,
-		 * and then add 1.
-		 */
-		ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371_0, &ide_init_triton, 1);
-		ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, &ide_init_triton, 0);
-		ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, &ide_init_triton, 0);
-#endif /* CONFIG_BLK_DEV_TRITON */
-		ide_probe_promise_20246();
-	}
-#endif /* CONFIG_PCI */
-#ifdef CONFIG_BLK_DEV_CMD640
-	{
-		extern void ide_probe_for_cmd640x (void);
-		ide_probe_for_cmd640x();
-	}
-#endif
-#ifdef CONFIG_BLK_DEV_PROMISE
-	init_dc4030();
-#endif
-}
-
-static int hwif_init (int h)
-{
-	ide_hwif_t *hwif = &ide_hwifs[h];
-	void (*rfn)(void);
-
-	if (!hwif->present)
-		return 0;
-	if (!hwif->irq) {
-		if (!(hwif->irq = default_irqs[h])) {
-			printk("%s: DISABLED, NO IRQ\n", hwif->name);
-			return (hwif->present = 0);
-		}
-	}
-#ifdef CONFIG_BLK_DEV_HD
-	if (hwif->irq == HD_IRQ && hwif->io_base != HD_DATA) {
-		printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name);
-		return (hwif->present = 0);
-	}
-#endif /* CONFIG_BLK_DEV_HD */
-
-	hwif->present = 0; /* we set it back to 1 if all is ok below */
-	switch (hwif->major) {
-	case IDE0_MAJOR: rfn = &do_ide0_request; break;
-#if MAX_HWIFS > 1
-	case IDE1_MAJOR: rfn = &do_ide1_request; break;
-#endif
-#if MAX_HWIFS > 2
-	case IDE2_MAJOR: rfn = &do_ide2_request; break;
-#endif
-#if MAX_HWIFS > 3
-	case IDE3_MAJOR: rfn = &do_ide3_request; break;
-#endif
-	default:
-		printk("%s: request_fn NOT DEFINED\n", hwif->name);
-		return (hwif->present = 0);
-	}
-	if (register_blkdev (hwif->major, hwif->name, &ide_fops)) {
-		printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major);
-	} else if (init_irq (hwif)) {
-		printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq);
-		(void) unregister_blkdev (hwif->major, hwif->name);
-	} else {
-		init_gendisk(hwif);
-		blk_dev[hwif->major].request_fn = rfn;
-		read_ahead[hwif->major] = 8;	/* (4kB) */
-		hwif->present = 1;	/* success */
-	}
-	return hwif->present;
-}
-
-/*
- * This is gets invoked once during initialization, to set *everything* up
- */
-int ide_init (void)
-{
-	int index;
-
-	init_ide_data ();
-	/*
-	 * Probe for special "known" interface chipsets
-	 */
-	probe_for_hwifs ();
-
-	/*
-	 * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
-	 */
-	for (index = 0; index < MAX_HWIFS; ++index)
-		probe_hwif (&ide_hwifs[index]);
-	for (index = 0; index < MAX_HWIFS; ++index)
-		hwif_init (index);
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
-	idetape_register_chrdev();	/* Register character device interface to the ide tape */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
-	return 0;
-}
-
-#ifdef CONFIG_BLK_DEV_IDE_PCMCIA
-int ide_register(int io_base, int ctl_port, int irq)
-{
-	int index, i, rc = -1;
-	ide_hwif_t *hwif;
-	ide_drive_t *drive;
-	unsigned long flags;
-
-	save_flags(flags);
-	cli();
-	for (index = 0; index < MAX_HWIFS; ++index) {
-		hwif = &ide_hwifs[index];
-		if (hwif->present) {
-			if (hwif->io_base == io_base || hwif->ctl_port == ctl_port)
-				break; /* this ide port already exists */
-		} else {
-			hwif->io_base = io_base;
-			hwif->ctl_port = ctl_port;
-			hwif->irq = irq;
-			hwif->noprobe = 0;
-			probe_hwif(hwif);
-			if (!hwif_init(index))
-				break;
-			for (i = 0; i < hwif->gd->nr_real; i++) {
-				drive = &hwif->drives[i];
-				revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS));
-#ifdef CONFIG_BLK_DEV_IDECD
-				if (drive->present && drive->media == ide_cdrom)
-					ide_cdrom_setup(drive);
-#endif /* CONFIG_BLK_DEV_IDECD */
-			}
-			rc = index;
-			break;
-		}
-	}
-	restore_flags(flags);
-	return rc;
-}
-
-void ide_unregister (unsigned int index)
-{
-	struct gendisk *gd, **gdp;
-	ide_hwif_t *hwif, *g;
-	ide_hwgroup_t *hwgroup;
-	int irq_count = 0;
-	unsigned long flags;
-
-	if (index >= MAX_HWIFS)
-		return;
-	save_flags(flags);
-	cli();
-	hwif = &ide_hwifs[index];
-	if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) {
-		restore_flags(flags);
-		return;
-	}
-	hwif->present = 0;
-	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);
-
-	/*
-	 * Note that we only release the standard ports,
-	 * and do not even try to handle any extra ports
-	 * allocated for weird IDE interface chipsets.
-	 */
-	release_region(hwif->io_base, 8);
-	release_region(hwif->ctl_port, 1);
-
-	/*
-	 * Remove us from the hwgroup, and free
-	 * the hwgroup if we were the only member
-	 */
-	while (hwgroup->hwif->next != hwif)
-		hwgroup->hwif = hwgroup->hwif->next;
-	hwgroup->hwif->next = hwif->next;
-	if (hwgroup->hwif == hwif)
-		hwgroup->hwif = hwif->next;
-	if (hwgroup->next_hwif == hwif)
-		hwgroup->next_hwif = hwif->next;
-	if (hwgroup->hwif == hwif)
-		kfree(hwgroup);
-
-	/*
-	 * Remove us from the kernel's knowledge
-	 */
-	unregister_blkdev(hwif->major, hwif->name);
-	kfree(blksize_size[hwif->major]);
-	blk_dev[hwif->major].request_fn = NULL;
-	blksize_size[hwif->major] = NULL;
-	for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next))
-		if (*gdp == hwif->gd)
-			break;
-	if (*gdp == NULL)
-		printk("gd not in disk chain!\n");
-	else {
-		gd = *gdp; *gdp = gd->next;
-		kfree(gd->sizes);
-		kfree(gd->part);
-		kfree(gd);
-	}
-	init_hwif_data (index);	/* restore hwif data to pristine status */
-	restore_flags(flags);
-}
-#endif /* CONFIG_BLK_DEV_IDE_PCMCIA */
diff --git a/linux/src/drivers/block/ide.c b/linux/src/drivers/block/ide.c
index 90f21b4..5dcd0aa 100644
--- a/linux/src/drivers/block/ide.c
+++ b/linux/src/drivers/block/ide.c
@@ -409,7 +409,11 @@ static void init_hwif_data (unsigned int index)
 		drive->special.b.set_geometry	= 1;
 		drive->name[0]			= 'h';
 		drive->name[1]			= 'd';
+#ifdef MACH
+		drive->name[2]			= '0' + (index * MAX_DRIVES) + unit;
+#else
 		drive->name[2]			= 'a' + (index * MAX_DRIVES) + unit;
+#endif
 	}
 }
 
@@ -609,7 +613,6 @@ static int lba_capacity_is_ok (struct hd_driveid *id)
 
 	/* very large drives (8GB+) may lie about the number of cylinders */
 	if (id->cyls == 16383 && id->heads == 16 && id->sectors == 63 && lba_sects > chs_sects) {
-		id->cyls = lba_sects / (16 * 63); /* correct cyls */
 		return 1;	/* lba_capacity is our only option */
 	}
 	/* perform a rough sanity check on lba_sects:  within 10% is "okay" */
@@ -646,7 +649,6 @@ static unsigned long current_capacity (ide_drive_t  *drive)
 	/* Determine capacity, and use LBA if the drive properly supports it */
 	if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) {
 		if (id->lba_capacity >= capacity) {
-			drive->cyl = id->lba_capacity / (drive->head * drive->sect);
 			capacity = id->lba_capacity;
 			drive->select.b.lba = 1;
 		}
@@ -1127,6 +1129,9 @@ read_next:
 		msect -= nsect;
 	} else
 		nsect = 1;
+	i = rq->nr_sectors - nsect;
+	if (i > 0 && !msect)
+		ide_set_handler (drive, &read_intr, WAIT_CMD);
 	ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
 #ifdef DEBUG
 	printk("%s:  read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
@@ -1136,14 +1141,11 @@ read_next:
 	rq->sector += nsect;
 	rq->buffer += nsect<<9;
 	rq->errors = 0;
-	i = (rq->nr_sectors -= nsect);
+	rq->nr_sectors = i;
 	if ((rq->current_nr_sectors -= nsect) <= 0)
 		ide_end_request(1, HWGROUP(drive));
-	if (i > 0) {
-		if (msect)
-			goto read_next;
-		ide_set_handler (drive, &read_intr, WAIT_CMD);
-	}
+	if (i > 0 && msect)
+		goto read_next;
 }
 
 /*
@@ -1171,8 +1173,8 @@ static void write_intr (ide_drive_t *drive)
 			if (rq->current_nr_sectors <= 0)
 				ide_end_request(1, hwgroup);
 			if (i > 0) {
-				ide_output_data (drive, rq->buffer, SECTOR_WORDS);
 				ide_set_handler (drive, &write_intr, WAIT_CMD);
+				ide_output_data (drive, rq->buffer, SECTOR_WORDS);
 			}
 			return;
 		}
@@ -1229,8 +1231,8 @@ static void multwrite_intr (ide_drive_t *drive)
 	if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
 		if (stat & DRQ_STAT) {
 			if (rq->nr_sectors) {
-				ide_multwrite(drive, drive->mult_count);
 				ide_set_handler (drive, &multwrite_intr, WAIT_CMD);
+				ide_multwrite(drive, drive->mult_count);
 				return;
 			}
 		} else {
@@ -1573,8 +1575,14 @@ static inline void do_request (ide_hwif_t *hwif, struct request *rq)
 	block    = rq->sector;
 	blockend = block + rq->nr_sectors;
 	if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) {
+#ifdef MACH
+	  printk ("%s%c: bad access: block=%ld, count=%ld, blockend=%ld, nr_sects%ld\n",
+		  drive->name, (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ',
+		  block, rq->nr_sectors, blockend, drive->part[minor&PARTN_MASK].nr_sects);
+#else
 		printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
 		 (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors);
+#endif
 		goto kill_rq;
 	}
 	block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0;
@@ -1596,7 +1604,7 @@ static inline void do_request (ide_hwif_t *hwif, struct request *rq)
 		printk("%s: drive not ready for command\n", drive->name);
 		return;
 	}
-	
+
 	if (!drive->special.all) {
 		if (rq->cmd == IDE_DRIVE_CMD) {
 			execute_drive_cmd(drive, rq);
@@ -1636,7 +1644,7 @@ static inline void do_request (ide_hwif_t *hwif, struct request *rq)
 #else
 		do_rw_disk (drive, rq, block); /* simpler and faster */
 		return;
-#endif /* CONFIG_BLK_DEV_IDEATAPI */;
+#endif /* CONFIG_BLK_DEV_IDEATAPI */
 	}
 	do_special(drive);
 	return;
@@ -1686,7 +1694,7 @@ void ide_do_request (ide_hwgroup_t *hwgroup)
 			hwgroup->active = 0;
 			return;		/* no work left for this hwgroup */
 		}
-	got_rq:	
+	got_rq:
 		do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq);
 		cli();
 	} while (hwgroup->handler == NULL);
@@ -2147,6 +2155,14 @@ static int ide_ioctl (struct inode *inode, struct file *file,
 		{
 			struct hd_geometry *loc = (struct hd_geometry *) arg;
 			if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
+#ifdef MACH
+			loc->heads = drive->bios_head;
+			loc->sectors = drive->bios_sect;
+			loc->cylinders = drive->bios_cyl;
+			loc->start
+			  = (drive->part[MINOR(inode->i_rdev)&PARTN_MASK]
+			     .start_sect);
+#else
 			err = verify_area(VERIFY_WRITE, loc, sizeof(*loc));
 			if (err) return err;
 			put_user(drive->bios_head, (byte *) &loc->heads);
@@ -2154,6 +2170,7 @@ static int ide_ioctl (struct inode *inode, struct file *file,
 			put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders);
 			put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,
 				(unsigned long *) &loc->start);
+#endif
 			return 0;
 		}
 		case BLKFLSBUF:
@@ -2410,7 +2427,7 @@ static inline void do_identify (ide_drive_t *drive, byte cmd)
 
 #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
 	/*
-	 * EATA SCSI controllers do a hardware ATA emulation:  
+	 * EATA SCSI controllers do a hardware ATA emulation:
 	 * Ignore them if there is a driver for them available.
 	 */
 	if ((id->model[0] == 'P' && id->model[1] == 'M')
@@ -2579,13 +2596,23 @@ static inline void do_identify (ide_drive_t *drive, byte cmd)
 	}
 
 	/* calculate drive capacity, and select LBA if possible */
-	(void) current_capacity (drive);
+	capacity = current_capacity (drive);
 
 	/* Correct the number of cyls if the bios value is too small */
-	if (drive->sect == drive->bios_sect && drive->head == drive->bios_head) {
-		if (drive->cyl > drive->bios_cyl)
-			drive->bios_cyl = drive->cyl;
-	}
+        if (!drive->forced_geom &&
+            capacity > drive->bios_cyl * drive->bios_sect * drive->bios_head) {
+                unsigned long cylsize;
+                cylsize = drive->bios_sect * drive->bios_head;
+                if (cylsize == 0 || capacity/cylsize > 65535) {
+                        drive->bios_sect = 63;
+                        drive->bios_head = 255;
+                        cylsize = 63*255;
+                }
+                if (capacity/cylsize > 65535)
+                        drive->bios_cyl = 65535;
+                else
+                        drive->bios_cyl = capacity/cylsize;
+        }
 
 	if (!strncmp(id->model, "BMI ", 4) &&
 	    strstr(id->model, " ENHANCED IDE ") &&
@@ -3302,7 +3329,7 @@ done:
  * This routine is called from the partition-table code in genhd.c
  * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
  *
- * The second parameter, "xparm", determines exactly how the translation 
+ * The second parameter, "xparm", determines exactly how the translation
  * will be handled:
  *		 0 = convert to CHS with fewer than 1024 cyls
  *			using the same method as Ontrack DiskManager.
@@ -3310,7 +3337,7 @@ done:
  *		-1 = similar to "0", plus redirect sector 0 to sector 1.
  *		>1 = convert to a CHS geometry with "xparm" heads.
  *
- * Returns 0 if the translation was not possible, if the device was not 
+ * Returns 0 if the translation was not possible, if the device was not
  * an IDE disk drive, or if a geometry was "forced" on the commandline.
  * Returns 1 if the geometry translation was successful.
  */
@@ -3621,7 +3648,7 @@ static int hwif_init (int h)
 {
 	ide_hwif_t *hwif = &ide_hwifs[h];
 	void (*rfn)(void);
-	
+
 	if (!hwif->present)
 		return 0;
 	if (!hwif->irq) {
@@ -3636,7 +3663,7 @@ static int hwif_init (int h)
 		return (hwif->present = 0);
 	}
 #endif /* CONFIG_BLK_DEV_HD */
-	
+
 	hwif->present = 0; /* we set it back to 1 if all is ok below */
 	switch (hwif->major) {
 	case IDE0_MAJOR: rfn = &do_ide0_request; break;
@@ -3691,7 +3718,7 @@ int ide_init (void)
 #ifdef CONFIG_BLK_DEV_IDETAPE
 	idetape_register_chrdev();	/* Register character device interface to the ide tape */
 #endif /* CONFIG_BLK_DEV_IDETAPE */
-	
+
 	return 0;
 }