add magicbox 2.0 cf slot support - kmod-ide must not be used on magicbox 1.1 (no working hw detection yet)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6909 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 2326 insertions, 4 deletions

diff --git a/package/kernel/modules/other.mk b/package/kernel/modules/other.mk
index 2aaa2ab393..0f6bb11222 100644
--- a/package/kernel/modules/other.mk
+++ b/package/kernel/modules/other.mk
@@ -51,7 +51,7 @@ define KernelPackage/ide-core
   KCONFIG:=$(CONFIG_IDE)
   FILES:=$(MODULES_DIR)/kernel/drivers/ide/*.$(LINUX_KMOD_SUFFIX)
   SUBMENU:=$(EMENU)
-  AUTOLOAD:=$(call AutoLoad,20,ide-core) $(call AutoLoad,90,ide-detect ide-disk)
+  AUTOLOAD:=$(call AutoLoad,20,ide-core) $(call AutoLoad,90,ide-generic ide-detect ide-disk)
 endef
 $(eval $(call KernelPackage,ide-core))
 
diff --git a/target/linux/magicbox-2.6/config/default b/target/linux/magicbox-2.6/config/default
index f17b33f64c..dc33f83c05 100644
--- a/target/linux/magicbox-2.6/config/default
+++ b/target/linux/magicbox-2.6/config/default
@@ -13,6 +13,17 @@ CONFIG_ARCH_POPULATES_NODE_MAP=y
 CONFIG_BASE_SMALL=0
 CONFIG_BIOS_FIXUP=y
 # CONFIG_BLK_DEV_FD is not set
+# CONFIG_BLK_DEV_HD is not set
+CONFIG_BLK_DEV_IDE=m
+# CONFIG_BLK_DEV_IDECD is not set
+CONFIG_BLK_DEV_IDEDISK=m
+# CONFIG_BLK_DEV_IDEDMA is not set
+# CONFIG_BLK_DEV_IDEFLOPPY is not set
+# CONFIG_BLK_DEV_IDEPCI is not set
+# CONFIG_BLK_DEV_IDESCSI is not set
+# CONFIG_BLK_DEV_IDETAPE is not set
+# CONFIG_BLK_DEV_IDE_SATA is not set
+CONFIG_BLK_DEV_MAGICBOX_IDE=y
 # CONFIG_BOOKE_WDT is not set
 CONFIG_BOOT_LOAD=0x00400000
 # CONFIG_BT is not set
@@ -47,12 +58,19 @@ CONFIG_IBM_EMAC_RX_COPY_THRESHOLD=256
 CONFIG_IBM_EMAC_RX_SKB_HEADROOM=0
 CONFIG_IBM_EMAC_TXB=8
 CONFIG_IBM_OCP=y
-# CONFIG_IDE is not set
+CONFIG_IDE=m
+# CONFIG_IDEDISK_MULTI_MODE is not set
+# CONFIG_IDEDMA_AUTO is not set
+# CONFIG_IDE_ARM is not set
+CONFIG_IDE_GENERIC=m
+CONFIG_IDE_MAX_HWIFS=4
+# CONFIG_IDE_TASK_IOCTL is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_ISA_DMA_API=y
 CONFIG_JFFS2_FS_DEBUG=0
 CONFIG_KERNEL_START=0xc0000000
 # CONFIG_KEXEC is not set
+# CONFIG_LEDS_TRIGGER_IDE_DISK is not set
 CONFIG_LOWMEM_SIZE=0x30000000
 CONFIG_MAGICBOX=y
 CONFIG_MATH_EMULATION=y
@@ -93,7 +111,6 @@ CONFIG_MTD_MAP_BANK_WIDTH_2=y
 CONFIG_MTD_MAP_BANK_WIDTH_4=y
 # CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
 # CONFIG_MTD_MTDRAM is not set
-# CONFIG_MTD_NAND is not set
 # CONFIG_MTD_OBSOLETE_CHIPS is not set
 # CONFIG_MTD_ONENAND is not set
 # CONFIG_MTD_OTP is not set
@@ -114,7 +131,6 @@ CONFIG_NOT_COHERENT_CACHE=y
 # CONFIG_NVRAM is not set
 # CONFIG_PCIPCWATCHDOG is not set
 CONFIG_PCI_DOMAINS=y
-# CONFIG_PCMCIA_ATMEL is not set
 # CONFIG_PC_KEYBOARD is not set
 # CONFIG_PM is not set
 CONFIG_PPC=y
diff --git a/target/linux/magicbox-2.6/patches/100-cf_slot.patch b/target/linux/magicbox-2.6/patches/100-cf_slot.patch
new file mode 100644
index 0000000000..b5e12438f2
--- /dev/null
+++ b/target/linux/magicbox-2.6/patches/100-cf_slot.patch
@@ -0,0 +1,2306 @@
+diff -purN linux.old/drivers/ide/ide.c linux.dev/drivers/ide/ide.c
+--- linux.old/drivers/ide/ide.c	2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/drivers/ide/ide.c	2007-04-09 01:25:30.866800288 +0200
+@@ -1783,6 +1783,7 @@ done:
+ 
+ extern void pnpide_init(void);
+ extern void h8300_ide_init(void);
++extern void ide_magicbox_init(void);
+ 
+ /*
+  * probe_for_hwifs() finds/initializes "known" IDE interfaces
+@@ -1847,6 +1848,9 @@ static void __init probe_for_hwifs (void
+ #ifdef CONFIG_H8300
+ 	h8300_ide_init();
+ #endif
++#ifdef CONFIG_BLK_DEV_MAGICBOX_IDE
++	ide_magicbox_init();
++#endif
+ }
+ 
+ void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
+diff -purN linux.old/drivers/ide/ide.c.orig linux.dev/drivers/ide/ide.c.orig
+--- linux.old/drivers/ide/ide.c.orig	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/ide/ide.c.orig	2007-01-10 20:10:37.000000000 +0100
+@@ -0,0 +1,2099 @@
++/*
++ *  linux/drivers/ide/ide.c		Version 7.00beta2	Mar 05 2003
++ *
++ *  Copyright (C) 1994-1998  Linus Torvalds & authors (see below)
++ */
++
++/*
++ *  Mostly written by Mark Lord  <mlord@pobox.com>
++ *                and Gadi Oxman <gadio@netvision.net.il>
++ *                and Andre Hedrick <andre@linux-ide.org>
++ *
++ *  See linux/MAINTAINERS for address of current maintainer.
++ *
++ * This is the multiple IDE interface driver, as evolved from hd.c.
++ * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
++ *   (usually 14 & 15).
++ * There can be up to two drives per interface, as per the ATA-2 spec.
++ *
++ * Primary:    ide0, port 0x1f0; major=3;  hda is minor=0; hdb is minor=64
++ * Secondary:  ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
++ * Tertiary:   ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
++ * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
++ * ...
++ *
++ *  From hd.c:
++ *  |
++ *  | It traverses the request-list, using interrupts to jump between functions.
++ *  | As nearly all functions can be called within interrupts, we may not sleep.
++ *  | Special care is recommended.  Have Fun!
++ *  |
++ *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
++ *  |
++ *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
++ *  | in the early extended-partition checks and added DM partitions.
++ *  |
++ *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
++ *  |
++ *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
++ *  | and general streamlining by Mark Lord (mlord@pobox.com).
++ *
++ *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
++ *
++ *	Mark Lord	(mlord@pobox.com)		(IDE Perf.Pkg)
++ *	Delman Lee	(delman@ieee.org)		("Mr. atdisk2")
++ *	Scott Snyder	(snyder@fnald0.fnal.gov)	(ATAPI IDE cd-rom)
++ *
++ *  This was a rewrite of just about everything from hd.c, though some original
++ *  code is still sprinkled about.  Think of it as a major evolution, with
++ *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
++ *
++ *  Version 1.0 ALPHA	initial code, primary i/f working okay
++ *  Version 1.3 BETA	dual i/f on shared irq tested & working!
++ *  Version 1.4 BETA	added auto probing for irq(s)
++ *  Version 1.5 BETA	added ALPHA (untested) support for IDE cd-roms,
++ *  ...
++ * Version 5.50		allow values as small as 20 for idebus=
++ * Version 5.51		force non io_32bit in drive_cmd_intr()
++ *			change delay_10ms() to delay_50ms() to fix problems
++ * Version 5.52		fix incorrect invalidation of removable devices
++ *			add "hdx=slow" command line option
++ * Version 5.60		start to modularize the driver; the disk and ATAPI
++ *			 drivers can be compiled as loadable modules.
++ *			move IDE probe code to ide-probe.c
++ *			move IDE disk code to ide-disk.c
++ *			add support for generic IDE device subdrivers
++ *			add m68k code from Geert Uytterhoeven
++ *			probe all interfaces by default
++ *			add ioctl to (re)probe an interface
++ * Version 6.00		use per device request queues
++ *			attempt to optimize shared hwgroup performance
++ *			add ioctl to manually adjust bandwidth algorithms
++ *			add kerneld support for the probe module
++ *			fix bug in ide_error()
++ *			fix bug in the first ide_get_lock() call for Atari
++ *			don't flush leftover data for ATAPI devices
++ * Version 6.01		clear hwgroup->active while the hwgroup sleeps
++ *			support HDIO_GETGEO for floppies
++ * Version 6.02		fix ide_ack_intr() call
++ *			check partition table on floppies
++ * Version 6.03		handle bad status bit sequencing in ide_wait_stat()
++ * Version 6.10		deleted old entries from this list of updates
++ *			replaced triton.c with ide-dma.c generic PCI DMA
++ *			added support for BIOS-enabled UltraDMA
++ *			rename all "promise" things to "pdc4030"
++ *			fix EZ-DRIVE handling on small disks
++ * Version 6.11		fix probe error in ide_scan_devices()
++ *			fix ancient "jiffies" polling bugs
++ *			mask all hwgroup interrupts on each irq entry
++ * Version 6.12		integrate ioctl and proc interfaces
++ *			fix parsing of "idex=" command line parameter
++ * Version 6.13		add support for ide4/ide5 courtesy rjones@orchestream.com
++ * Version 6.14		fixed IRQ sharing among PCI devices
++ * Version 6.15		added SMP awareness to IDE drivers
++ * Version 6.16		fixed various bugs; even more SMP friendly
++ * Version 6.17		fix for newest EZ-Drive problem
++ * Version 6.18		default unpartitioned-disk translation now "BIOS LBA"
++ * Version 6.19		Re-design for a UNIFORM driver for all platforms,
++ *			  model based on suggestions from Russell King and
++ *			  Geert Uytterhoeven
++ *			Promise DC4030VL now supported.
++ *			add support for ide6/ide7
++ *			delay_50ms() changed to ide_delay_50ms() and exported.
++ * Version 6.20		Added/Fixed Generic ATA-66 support and hwif detection.
++ *			Added hdx=flash to allow for second flash disk
++ *			  detection w/o the hang loop.
++ *			Added support for ide8/ide9
++ *			Added idex=ata66 for the quirky chipsets that are
++ *			  ATA-66 compliant, but have yet to determine a method
++ *			  of verification of the 80c cable presence.
++ *			  Specifically Promise's PDC20262 chipset.
++ * Version 6.21		Fixing/Fixed SMP spinlock issue with insight from an old
++ *			  hat that clarified original low level driver design.
++ * Version 6.30		Added SMP support; fixed multmode issues.  -ml
++ * Version 6.31		Debug Share INTR's and request queue streaming
++ *			Native ATA-100 support
++ *			Prep for Cascades Project
++ * Version 7.00alpha	First named revision of ide rearrange
++ *
++ *  Some additional driver compile-time options are in ./include/linux/ide.h
++ *
++ *  To do, in likely order of completion:
++ *	- modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
++ *
++ */
++
++#define	REVISION	"Revision: 7.00alpha2"
++#define	VERSION		"Id: ide.c 7.00a2 20020906"
++
++#undef REALLY_SLOW_IO		/* most systems can safely undef this */
++
++#define _IDE_C			/* Tell ide.h it's really us */
++
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/string.h>
++#include <linux/kernel.h>
++#include <linux/timer.h>
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++#include <linux/major.h>
++#include <linux/errno.h>
++#include <linux/genhd.h>
++#include <linux/blkpg.h>
++#include <linux/slab.h>
++#include <linux/init.h>
++#include <linux/pci.h>
++#include <linux/delay.h>
++#include <linux/ide.h>
++#include <linux/completion.h>
++#include <linux/reboot.h>
++#include <linux/cdrom.h>
++#include <linux/seq_file.h>
++#include <linux/device.h>
++#include <linux/bitops.h>
++
++#include <asm/byteorder.h>
++#include <asm/irq.h>
++#include <asm/uaccess.h>
++#include <asm/io.h>
++
++
++/* default maximum number of failures */
++#define IDE_DEFAULT_MAX_FAILURES 	1
++
++static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
++					IDE2_MAJOR, IDE3_MAJOR,
++					IDE4_MAJOR, IDE5_MAJOR,
++					IDE6_MAJOR, IDE7_MAJOR,
++					IDE8_MAJOR, IDE9_MAJOR };
++
++static int idebus_parameter;	/* holds the "idebus=" parameter */
++static int system_bus_speed;	/* holds what we think is VESA/PCI bus speed */
++static int initializing;	/* set while initializing built-in drivers */
++
++DECLARE_MUTEX(ide_cfg_sem);
++ __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
++
++#ifdef CONFIG_BLK_DEV_IDEPCI
++static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
++#endif
++
++#ifdef CONFIG_IDEDMA_AUTO
++int noautodma = 0;
++#else
++int noautodma = 1;
++#endif
++
++EXPORT_SYMBOL(noautodma);
++
++/*
++ * This is declared extern in ide.h, for access by other IDE modules:
++ */
++ide_hwif_t ide_hwifs[MAX_HWIFS];	/* master data repository */
++
++EXPORT_SYMBOL(ide_hwifs);
++
++/*
++ * Do not even *think* about calling this!
++ */
++static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
++{
++	unsigned int unit;
++
++	/* bulk initialize hwif & drive info with zeros */
++	memset(hwif, 0, sizeof(ide_hwif_t));
++
++	/* fill in any non-zero initial values */
++	hwif->index	= index;
++	hwif->major	= ide_hwif_to_major[index];
++
++	hwif->name[0]	= 'i';
++	hwif->name[1]	= 'd';
++	hwif->name[2]	= 'e';
++	hwif->name[3]	= '0' + index;
++
++	hwif->bus_state	= BUSSTATE_ON;
++
++	hwif->atapi_dma = 0;		/* disable all atapi dma */ 
++	hwif->ultra_mask = 0x80;	/* disable all ultra */
++	hwif->mwdma_mask = 0x80;	/* disable all mwdma */
++	hwif->swdma_mask = 0x80;	/* disable all swdma */
++
++	init_completion(&hwif->gendev_rel_comp);
++
++	default_hwif_iops(hwif);
++	default_hwif_transport(hwif);
++	for (unit = 0; unit < MAX_DRIVES; ++unit) {
++		ide_drive_t *drive = &hwif->drives[unit];
++
++		drive->media			= ide_disk;
++		drive->select.all		= (unit<<4)|0xa0;
++		drive->hwif			= hwif;
++		drive->ctl			= 0x08;
++		drive->ready_stat		= READY_STAT;
++		drive->bad_wstat		= BAD_W_STAT;
++		drive->special.b.recalibrate	= 1;
++		drive->special.b.set_geometry	= 1;
++		drive->name[0]			= 'h';
++		drive->name[1]			= 'd';
++		drive->name[2]			= 'a' + (index * MAX_DRIVES) + unit;
++		drive->max_failures		= IDE_DEFAULT_MAX_FAILURES;
++		drive->using_dma		= 0;
++		drive->vdma			= 0;
++		INIT_LIST_HEAD(&drive->list);
++		init_completion(&drive->gendev_rel_comp);
++	}
++}
++
++static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
++{
++	hw_regs_t hw;
++
++	memset(&hw, 0, sizeof(hw_regs_t));
++
++	ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
++
++	memcpy(&hwif->hw, &hw, sizeof(hw));
++	memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
++
++	hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
++#ifdef CONFIG_BLK_DEV_HD
++	if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
++		hwif->noprobe = 1;	/* may be overridden by ide_setup() */
++#endif
++}
++
++extern void ide_arm_init(void);
++
++/*
++ * init_ide_data() sets reasonable default values into all fields
++ * of all instances of the hwifs and drives, but only on the first call.
++ * Subsequent calls have no effect (they don't wipe out anything).
++ *
++ * This routine is normally called at driver initialization time,
++ * but may also be called MUCH earlier during kernel "command-line"
++ * parameter processing.  As such, we cannot depend on any other parts
++ * of the kernel (such as memory allocation) to be functioning yet.
++ *
++ * This is too bad, as otherwise we could dynamically allocate the
++ * ide_drive_t structs as needed, rather than always consuming memory
++ * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
++ *
++ * FIXME: We should stuff the setup data into __init and copy the
++ * relevant hwifs/allocate them properly during boot.
++ */
++#define MAGIC_COOKIE 0x12345678
++static void __init init_ide_data (void)
++{
++	ide_hwif_t *hwif;
++	unsigned int index;
++	static unsigned long magic_cookie = MAGIC_COOKIE;
++
++	if (magic_cookie != MAGIC_COOKIE)
++		return;		/* already initialized */
++	magic_cookie = 0;
++
++	/* Initialise all interface structures */
++	for (index = 0; index < MAX_HWIFS; ++index) {
++		hwif = &ide_hwifs[index];
++		init_hwif_data(hwif, index);
++		init_hwif_default(hwif, index);
++#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
++		hwif->irq = hwif->hw.irq =
++			ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
++#endif
++	}
++#ifdef CONFIG_IDE_ARM
++	initializing = 1;
++	ide_arm_init();
++	initializing = 0;
++#endif
++}
++
++/**
++ *	ide_system_bus_speed	-	guess bus speed
++ *
++ *	ide_system_bus_speed() returns what we think is the system VESA/PCI
++ *	bus speed (in MHz). This is used for calculating interface PIO timings.
++ *	The default is 40 for known PCI systems, 50 otherwise.
++ *	The "idebus=xx" parameter can be used to override this value.
++ *	The actual value to be used is computed/displayed the first time
++ *	through. Drivers should only use this as a last resort.
++ *
++ *	Returns a guessed speed in MHz.
++ */
++
++static int ide_system_bus_speed(void)
++{
++#ifdef CONFIG_PCI
++	static struct pci_device_id pci_default[] = {
++		{ PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
++		{ }
++	};
++#else
++#define pci_default 0
++#endif /* CONFIG_PCI */
++
++	if (!system_bus_speed) {
++		if (idebus_parameter) {
++			/* user supplied value */
++			system_bus_speed = idebus_parameter;
++		} else if (pci_dev_present(pci_default)) {
++			/* safe default value for PCI */
++			system_bus_speed = 33;
++		} else {
++			/* safe default value for VESA and PCI */
++			system_bus_speed = 50;
++		}
++		printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
++			"for PIO modes%s\n", system_bus_speed,
++			idebus_parameter ? "" : "; override with idebus=xx");
++	}
++	return system_bus_speed;
++}
++
++#ifdef CONFIG_PROC_FS
++struct proc_dir_entry *proc_ide_root;
++#endif
++
++static struct resource* hwif_request_region(ide_hwif_t *hwif,
++					    unsigned long addr, int num)
++{
++	struct resource *res = request_region(addr, num, hwif->name);
++
++	if (!res)
++		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
++				hwif->name, addr, addr+num-1);
++	return res;
++}
++
++/**
++ *	ide_hwif_request_regions - request resources for IDE
++ *	@hwif: interface to use
++ *
++ *	Requests all the needed resources for an interface.
++ *	Right now core IDE code does this work which is deeply wrong.
++ *	MMIO leaves it to the controller driver,
++ *	PIO will migrate this way over time.
++ */
++
++int ide_hwif_request_regions(ide_hwif_t *hwif)
++{
++	unsigned long addr;
++	unsigned int i;
++
++	if (hwif->mmio == 2)
++		return 0;
++	BUG_ON(hwif->mmio == 1);
++	addr = hwif->io_ports[IDE_CONTROL_OFFSET];
++	if (addr && !hwif_request_region(hwif, addr, 1))
++		goto control_region_busy;
++	hwif->straight8 = 0;
++	addr = hwif->io_ports[IDE_DATA_OFFSET];
++	if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
++		if (!hwif_request_region(hwif, addr, 8))
++			goto data_region_busy;
++		hwif->straight8 = 1;
++		return 0;
++	}
++	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
++		addr = hwif->io_ports[i];
++		if (!hwif_request_region(hwif, addr, 1)) {
++			while (--i)
++				release_region(addr, 1);
++			goto data_region_busy;
++		}
++	}
++	return 0;
++
++data_region_busy:
++	addr = hwif->io_ports[IDE_CONTROL_OFFSET];
++	if (addr)
++		release_region(addr, 1);
++control_region_busy:
++	/* If any errors are return, we drop the hwif interface. */
++	return -EBUSY;
++}
++
++/**
++ *	ide_hwif_release_regions - free IDE resources
++ *
++ *	Note that we only release the standard ports,
++ *	and do not even try to handle any extra ports
++ *	allocated for weird IDE interface chipsets.
++ *
++ *	Note also that we don't yet handle mmio resources here. More
++ *	importantly our caller should be doing this so we need to 
++ *	restructure this as a helper function for drivers.
++ */
++
++void ide_hwif_release_regions(ide_hwif_t *hwif)
++{
++	u32 i = 0;
++
++	if (hwif->mmio == 2)
++		return;
++	if (hwif->io_ports[IDE_CONTROL_OFFSET])
++		release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
++	if (hwif->straight8) {
++		release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
++		return;
++	}
++	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
++		if (hwif->io_ports[i])
++			release_region(hwif->io_ports[i], 1);
++}
++
++/**
++ *	ide_hwif_restore	-	restore hwif to template
++ *	@hwif: hwif to update
++ *	@tmp_hwif: template
++ *
++ *	Restore hwif to a previous state by copying most settings
++ *	from the template.
++ */
++
++static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
++{
++	hwif->hwgroup			= tmp_hwif->hwgroup;
++
++	hwif->gendev.parent		= tmp_hwif->gendev.parent;
++
++	hwif->proc			= tmp_hwif->proc;
++
++	hwif->major			= tmp_hwif->major;
++	hwif->straight8			= tmp_hwif->straight8;
++	hwif->bus_state			= tmp_hwif->bus_state;
++
++	hwif->atapi_dma			= tmp_hwif->atapi_dma;
++	hwif->ultra_mask		= tmp_hwif->ultra_mask;
++	hwif->mwdma_mask		= tmp_hwif->mwdma_mask;
++	hwif->swdma_mask		= tmp_hwif->swdma_mask;
++
++	hwif->chipset			= tmp_hwif->chipset;
++	hwif->hold			= tmp_hwif->hold;
++
++#ifdef CONFIG_BLK_DEV_IDEPCI
++	hwif->pci_dev			= tmp_hwif->pci_dev;
++	hwif->cds			= tmp_hwif->cds;
++#endif
++
++	hwif->tuneproc			= tmp_hwif->tuneproc;
++	hwif->speedproc			= tmp_hwif->speedproc;
++	hwif->selectproc		= tmp_hwif->selectproc;
++	hwif->reset_poll		= tmp_hwif->reset_poll;
++	hwif->pre_reset			= tmp_hwif->pre_reset;
++	hwif->resetproc			= tmp_hwif->resetproc;
++	hwif->intrproc			= tmp_hwif->intrproc;
++	hwif->maskproc			= tmp_hwif->maskproc;
++	hwif->quirkproc			= tmp_hwif->quirkproc;
++	hwif->busproc			= tmp_hwif->busproc;
++
++	hwif->ata_input_data		= tmp_hwif->ata_input_data;
++	hwif->ata_output_data		= tmp_hwif->ata_output_data;
++	hwif->atapi_input_bytes		= tmp_hwif->atapi_input_bytes;
++	hwif->atapi_output_bytes	= tmp_hwif->atapi_output_bytes;
++
++	hwif->dma_setup			= tmp_hwif->dma_setup;
++	hwif->dma_exec_cmd		= tmp_hwif->dma_exec_cmd;
++	hwif->dma_start			= tmp_hwif->dma_start;
++	hwif->ide_dma_end		= tmp_hwif->ide_dma_end;
++	hwif->ide_dma_check		= tmp_hwif->ide_dma_check;
++	hwif->ide_dma_on		= tmp_hwif->ide_dma_on;
++	hwif->ide_dma_off_quietly	= tmp_hwif->ide_dma_off_quietly;
++	hwif->ide_dma_test_irq		= tmp_hwif->ide_dma_test_irq;
++	hwif->ide_dma_host_on		= tmp_hwif->ide_dma_host_on;
++	hwif->ide_dma_host_off		= tmp_hwif->ide_dma_host_off;
++	hwif->ide_dma_lostirq		= tmp_hwif->ide_dma_lostirq;
++	hwif->ide_dma_timeout		= tmp_hwif->ide_dma_timeout;
++
++	hwif->OUTB			= tmp_hwif->OUTB;
++	hwif->OUTBSYNC			= tmp_hwif->OUTBSYNC;
++	hwif->OUTW			= tmp_hwif->OUTW;
++	hwif->OUTL			= tmp_hwif->OUTL;
++	hwif->OUTSW			= tmp_hwif->OUTSW;
++	hwif->OUTSL			= tmp_hwif->OUTSL;
++
++	hwif->INB			= tmp_hwif->INB;
++	hwif->INW			= tmp_hwif->INW;
++	hwif->INL			= tmp_hwif->INL;
++	hwif->INSW			= tmp_hwif->INSW;
++	hwif->INSL			= tmp_hwif->INSL;
++
++	hwif->sg_max_nents		= tmp_hwif->sg_max_nents;
++
++	hwif->mmio			= tmp_hwif->mmio;
++	hwif->rqsize			= tmp_hwif->rqsize;
++	hwif->no_lba48			= tmp_hwif->no_lba48;
++
++#ifndef CONFIG_BLK_DEV_IDECS
++	hwif->irq			= tmp_hwif->irq;
++#endif
++
++	hwif->dma_base			= tmp_hwif->dma_base;
++	hwif->dma_master		= tmp_hwif->dma_master;
++	hwif->dma_command		= tmp_hwif->dma_command;
++	hwif->dma_vendor1		= tmp_hwif->dma_vendor1;
++	hwif->dma_status		= tmp_hwif->dma_status;
++	hwif->dma_vendor3		= tmp_hwif->dma_vendor3;
++	hwif->dma_prdtable		= tmp_hwif->dma_prdtable;
++
++	hwif->config_data		= tmp_hwif->config_data;
++	hwif->select_data		= tmp_hwif->select_data;
++	hwif->extra_base		= tmp_hwif->extra_base;
++	hwif->extra_ports		= tmp_hwif->extra_ports;
++	hwif->autodma			= tmp_hwif->autodma;
++	hwif->udma_four			= tmp_hwif->udma_four;
++	hwif->no_dsc			= tmp_hwif->no_dsc;
++
++	hwif->hwif_data			= tmp_hwif->hwif_data;
++}
++
++/**
++ *	ide_unregister		-	free an IDE interface
++ *	@index: index of interface (will change soon to a pointer)
++ *
++ *	Perform the final unregister of an IDE interface. At the moment
++ *	we don't refcount interfaces so this will also get split up.
++ *
++ *	Locking:
++ *	The caller must not hold the IDE locks
++ *	The drive present/vanishing is not yet properly locked
++ *	Take care with the callbacks. These have been split to avoid
++ *	deadlocking the IDE layer. The shutdown callback is called
++ *	before we take the lock and free resources. It is up to the
++ *	caller to be sure there is no pending I/O here, and that
++ *	the interface will not be reopened (present/vanishing locking
++ *	isn't yet done BTW). After we commit to the final kill we
++ *	call the cleanup callback with the ide locks held.
++ *
++ *	Unregister restores the hwif structures to the default state.
++ *	This is raving bonkers.
++ */
++
++void ide_unregister(unsigned int index)
++{
++	ide_drive_t *drive;
++	ide_hwif_t *hwif, *g;
++	static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
++	ide_hwgroup_t *hwgroup;
++	int irq_count = 0, unit;
++
++	BUG_ON(index >= MAX_HWIFS);
++
++	BUG_ON(in_interrupt());
++	BUG_ON(irqs_disabled());
++	down(&ide_cfg_sem);
++	spin_lock_irq(&ide_lock);
++	hwif = &ide_hwifs[index];
++	if (!hwif->present)
++		goto abort;
++	for (unit = 0; unit < MAX_DRIVES; ++unit) {
++		drive = &hwif->drives[unit];
++		if (!drive->present)
++			continue;
++		spin_unlock_irq(&ide_lock);
++		device_unregister(&drive->gendev);
++		wait_for_completion(&drive->gendev_rel_comp);
++		spin_lock_irq(&ide_lock);
++	}
++	hwif->present = 0;
++
++	spin_unlock_irq(&ide_lock);
++
++	destroy_proc_ide_interface(hwif);
++
++	hwgroup = hwif->hwgroup;
++	/*
++	 * free the irq if we were the only hwif using it
++	 */
++	g = hwgroup->hwif;
++	do {
++		if (g->irq == hwif->irq)
++			++irq_count;
++		g = g->next;
++	} while (g != hwgroup->hwif);
++	if (irq_count == 1)
++		free_irq(hwif->irq, hwgroup);
++
++	spin_lock_irq(&ide_lock);
++	/*
++	 * Note that we only release the standard ports,
++	 * and do not even try to handle any extra ports
++	 * allocated for weird IDE interface chipsets.
++	 */
++	ide_hwif_release_regions(hwif);
++
++	/*
++	 * Remove us from the hwgroup, and free
++	 * the hwgroup if we were the only member
++	 */
++	if (hwif->next == hwif) {
++		BUG_ON(hwgroup->hwif != hwif);
++		kfree(hwgroup);
++	} else {
++		/* There is another interface in hwgroup.
++		 * Unlink us, and set hwgroup->drive and ->hwif to
++		 * something sane.
++		 */
++		g = hwgroup->hwif;
++		while (g->next != hwif)
++			g = g->next;
++		g->next = hwif->next;
++		if (hwgroup->hwif == hwif) {
++			/* Chose a random hwif for hwgroup->hwif.
++			 * It's guaranteed that there are no drives
++			 * left in the hwgroup.
++			 */
++			BUG_ON(hwgroup->drive != NULL);
++			hwgroup->hwif = g;
++		}
++		BUG_ON(hwgroup->hwif == hwif);
++	}
++
++	/* More messed up locking ... */
++	spin_unlock_irq(&ide_lock);
++	device_unregister(&hwif->gendev);
++	wait_for_completion(&hwif->gendev_rel_comp);
++
++	/*
++	 * Remove us from the kernel's knowledge
++	 */
++	blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
++	kfree(hwif->sg_table);
++	unregister_blkdev(hwif->major, hwif->name);
++	spin_lock_irq(&ide_lock);
++
++	if (hwif->dma_base) {
++		(void) ide_release_dma(hwif);
++
++		hwif->dma_base = 0;
++		hwif->dma_master = 0;
++		hwif->dma_command = 0;
++		hwif->dma_vendor1 = 0;
++		hwif->dma_status = 0;
++		hwif->dma_vendor3 = 0;
++		hwif->dma_prdtable = 0;
++
++		hwif->extra_base  = 0;
++		hwif->extra_ports = 0;
++	}
++
++	/* copy original settings */
++	tmp_hwif = *hwif;
++
++	/* restore hwif data to pristine status */
++	init_hwif_data(hwif, index);
++	init_hwif_default(hwif, index);
++
++	ide_hwif_restore(hwif, &tmp_hwif);
++
++abort:
++	spin_unlock_irq(&ide_lock);
++	up(&ide_cfg_sem);
++}
++
++EXPORT_SYMBOL(ide_unregister);
++
++
++/**
++ *	ide_setup_ports 	-	set up IDE interface ports
++ *	@hw: register descriptions
++ *	@base: base register
++ *	@offsets: table of register offsets
++ *	@ctrl: control register
++ *	@ack_irq: IRQ ack
++ *	@irq: interrupt lie
++ *
++ *	Setup hw_regs_t structure described by parameters.  You
++ *	may set up the hw structure yourself OR use this routine to
++ *	do it for you. This is basically a helper
++ *
++ */
++ 
++void ide_setup_ports (	hw_regs_t *hw,
++			unsigned long base, int *offsets,
++			unsigned long ctrl, unsigned long intr,
++			ide_ack_intr_t *ack_intr,
++/*
++ *			ide_io_ops_t *iops,
++ */
++			int irq)
++{
++	int i;
++
++	memset(hw, 0, sizeof(hw_regs_t));
++	for (i = 0; i < IDE_NR_PORTS; i++) {
++		if (offsets[i] == -1) {
++			switch(i) {
++				case IDE_CONTROL_OFFSET:
++					hw->io_ports[i] = ctrl;
++					break;
++#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
++				case IDE_IRQ_OFFSET:
++					hw->io_ports[i] = intr;
++					break;
++#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
++				default:
++					hw->io_ports[i] = 0;
++					break;
++			}
++		} else {
++			hw->io_ports[i] = base + offsets[i];
++		}
++	}
++	hw->irq = irq;
++	hw->dma = NO_DMA;
++	hw->ack_intr = ack_intr;
++/*
++ *	hw->iops = iops;
++ */
++}
++
++/**
++ *	ide_register_hw_with_fixup	-	register IDE interface
++ *	@hw: hardware registers
++ *	@hwifp: pointer to returned hwif
++ *	@fixup: fixup function
++ *
++ *	Register an IDE interface, specifying exactly the registers etc.
++ *	Set init=1 iff calling before probes have taken place.
++ *
++ *	Returns -1 on error.
++ */
++
++int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
++{
++	int index, retry = 1;
++	ide_hwif_t *hwif;
++
++	do {
++		for (index = 0; index < MAX_HWIFS; ++index) {
++			hwif = &ide_hwifs[index];
++			if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
++				goto found;
++		}
++		for (index = 0; index < MAX_HWIFS; ++index) {
++			hwif = &ide_hwifs[index];
++			if (hwif->hold)
++				continue;
++			if ((!hwif->present && !hwif->mate && !initializing) ||
++			    (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
++				goto found;
++		}
++		for (index = 0; index < MAX_HWIFS; index++)
++			ide_unregister(index);
++	} while (retry--);
++	return -1;
++found:
++	if (hwif->present)
++		ide_unregister(index);
++	else if (!hwif->hold) {
++		init_hwif_data(hwif, index);
++		init_hwif_default(hwif, index);
++	}
++	if (hwif->present)
++		return -1;
++	memcpy(&hwif->hw, hw, sizeof(*hw));
++	memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
++	hwif->irq = hw->irq;
++	hwif->noprobe = 0;
++	hwif->chipset = hw->chipset;
++	hwif->gendev.parent = hw->dev;
++
++	if (!initializing) {
++		probe_hwif_init_with_fixup(hwif, fixup);
++		create_proc_ide_interfaces();
++	}
++
++	if (hwifp)
++		*hwifp = hwif;
++
++	return (initializing || hwif->present) ? index : -1;
++}
++
++EXPORT_SYMBOL(ide_register_hw_with_fixup);
++
++int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
++{
++	return ide_register_hw_with_fixup(hw, hwifp, NULL);
++}
++
++EXPORT_SYMBOL(ide_register_hw);
++
++/*
++ *	Locks for IDE setting functionality
++ */
++
++DECLARE_MUTEX(ide_setting_sem);
++
++/**
++ *	__ide_add_setting	-	add an ide setting option
++ *	@drive: drive to use
++ *	@name: setting name
++ *	@rw: true if the function is read write
++ *	@read_ioctl: function to call on read
++ *	@write_ioctl: function to call on write
++ *	@data_type: type of data
++ *	@min: range minimum
++ *	@max: range maximum
++ *	@mul_factor: multiplication scale
++ *	@div_factor: divison scale
++ *	@data: private data field
++ *	@set: setting
++ *	@auto_remove: setting auto removal flag
++ *
++ *	Removes the setting named from the device if it is present.
++ *	The function takes the settings_lock to protect against 
++ *	parallel changes. This function must not be called from IRQ
++ *	context. Returns 0 on success or -1 on failure.
++ *
++ *	BUGS: This code is seriously over-engineered. There is also
++ *	magic about how the driver specific features are setup. If
++ *	a driver is attached we assume the driver settings are auto
++ *	remove.
++ */
++
++static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
++{
++	ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
++
++	down(&ide_setting_sem);
++	while ((*p) && strcmp((*p)->name, name) < 0)
++		p = &((*p)->next);
++	if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
++		goto abort;
++	if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
++		goto abort;
++	strcpy(setting->name, name);
++	setting->rw = rw;
++	setting->read_ioctl = read_ioctl;
++	setting->write_ioctl = write_ioctl;
++	setting->data_type = data_type;
++	setting->min = min;
++	setting->max = max;
++	setting->mul_factor = mul_factor;
++	setting->div_factor = div_factor;
++	setting->data = data;
++	setting->set = set;
++	
++	setting->next = *p;
++	if (auto_remove)
++		setting->auto_remove = 1;
++	*p = setting;
++	up(&ide_setting_sem);
++	return 0;
++abort:
++	up(&ide_setting_sem);
++	kfree(setting);
++	return -1;
++}
++
++int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
++{
++	return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
++}
++
++EXPORT_SYMBOL(ide_add_setting);
++
++/**
++ *	__ide_remove_setting	-	remove an ide setting option
++ *	@drive: drive to use
++ *	@name: setting name
++ *
++ *	Removes the setting named from the device if it is present.
++ *	The caller must hold the setting semaphore.
++ */
++ 
++static void __ide_remove_setting (ide_drive_t *drive, char *name)
++{
++	ide_settings_t **p, *setting;
++
++	p = (ide_settings_t **) &drive->settings;
++
++	while ((*p) && strcmp((*p)->name, name))
++		p = &((*p)->next);
++	if ((setting = (*p)) == NULL)
++		return;
++
++	(*p) = setting->next;
++	
++	kfree(setting->name);
++	kfree(setting);
++}
++
++/**
++ *	ide_find_setting_by_ioctl	-	find a drive specific ioctl
++ *	@drive: drive to scan
++ *	@cmd: ioctl command to handle
++ *
++ *	Scan's the device setting table for a matching entry and returns
++ *	this or NULL if no entry is found. The caller must hold the
++ *	setting semaphore
++ */
++ 
++static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
++{
++	ide_settings_t *setting = drive->settings;
++
++	while (setting) {
++		if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
++			break;
++		setting = setting->next;
++	}
++	
++	return setting;
++}
++
++/**
++ *	ide_find_setting_by_name	-	find a drive specific setting
++ *	@drive: drive to scan
++ *	@name: setting name
++ *
++ *	Scan's the device setting table for a matching entry and returns
++ *	this or NULL if no entry is found. The caller must hold the
++ *	setting semaphore
++ */
++ 
++ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
++{
++	ide_settings_t *setting = drive->settings;
++
++	while (setting) {
++		if (strcmp(setting->name, name) == 0)
++			break;
++		setting = setting->next;
++	}
++	return setting;
++}
++
++/**
++ *	auto_remove_settings	-	remove driver specific settings
++ *	@drive: drive
++ *
++ *	Automatically remove all the driver specific settings for this
++ *	drive. This function may sleep and must not be called from IRQ
++ *	context. The caller must hold ide_setting_sem.
++ */
++ 
++static void auto_remove_settings (ide_drive_t *drive)
++{
++	ide_settings_t *setting;
++repeat:
++	setting = drive->settings;
++	while (setting) {
++		if (setting->auto_remove) {
++			__ide_remove_setting(drive, setting->name);
++			goto repeat;
++		}
++		setting = setting->next;
++	}
++}
++
++/**
++ *	ide_read_setting	-	read an IDE setting
++ *	@drive: drive to read from
++ *	@setting: drive setting
++ *
++ *	Read a drive setting and return the value. The caller
++ *	must hold the ide_setting_sem when making this call.
++ *
++ *	BUGS: the data return and error are the same return value
++ *	so an error -EINVAL and true return of the same value cannot
++ *	be told apart
++ */
++ 
++int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
++{
++	int		val = -EINVAL;
++	unsigned long	flags;
++
++	if ((setting->rw & SETTING_READ)) {
++		spin_lock_irqsave(&ide_lock, flags);
++		switch(setting->data_type) {
++			case TYPE_BYTE:
++				val = *((u8 *) setting->data);
++				break;
++			case TYPE_SHORT:
++				val = *((u16 *) setting->data);
++				break;
++			case TYPE_INT:
++			case TYPE_INTA:
++				val = *((u32 *) setting->data);
++				break;
++		}
++		spin_unlock_irqrestore(&ide_lock, flags);
++	}
++	return val;
++}
++
++/**
++ *	ide_spin_wait_hwgroup	-	wait for group
++ *	@drive: drive in the group
++ *
++ *	Wait for an IDE device group to go non busy and then return
++ *	holding the ide_lock which guards the hwgroup->busy status
++ *	and right to use it.
++ */
++
++int ide_spin_wait_hwgroup (ide_drive_t *drive)
++{
++	ide_hwgroup_t *hwgroup = HWGROUP(drive);
++	unsigned long timeout = jiffies + (3 * HZ);
++
++	spin_lock_irq(&ide_lock);
++
++	while (hwgroup->busy) {
++		unsigned long lflags;
++		spin_unlock_irq(&ide_lock);
++		local_irq_set(lflags);
++		if (time_after(jiffies, timeout)) {
++			local_irq_restore(lflags);
++			printk(KERN_ERR "%s: channel busy\n", drive->name);
++			return -EBUSY;
++		}
++		local_irq_restore(lflags);
++		spin_lock_irq(&ide_lock);
++	}
++	return 0;
++}
++
++EXPORT_SYMBOL(ide_spin_wait_hwgroup);
++
++/**
++ *	ide_write_setting	-	read an IDE setting
++ *	@drive: drive to read from
++ *	@setting: drive setting
++ *	@val: value
++ *
++ *	Write a drive setting if it is possible. The caller
++ *	must hold the ide_setting_sem when making this call.
++ *
++ *	BUGS: the data return and error are the same return value
++ *	so an error -EINVAL and true return of the same value cannot
++ *	be told apart
++ *
++ *	FIXME:  This should be changed to enqueue a special request
++ *	to the driver to change settings, and then wait on a sema for completion.
++ *	The current scheme of polling is kludgy, though safe enough.
++ */
++
++int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
++{
++	int i;
++	u32 *p;
++
++	if (!capable(CAP_SYS_ADMIN))
++		return -EACCES;
++	if (!(setting->rw & SETTING_WRITE))
++		return -EPERM;
++	if (val < setting->min || val > setting->max)
++		return -EINVAL;
++	if (setting->set)
++		return setting->set(drive, val);
++	if (ide_spin_wait_hwgroup(drive))
++		return -EBUSY;
++	switch (setting->data_type) {
++		case TYPE_BYTE:
++			*((u8 *) setting->data) = val;
++			break;
++		case TYPE_SHORT:
++			*((u16 *) setting->data) = val;
++			break;
++		case TYPE_INT:
++			*((u32 *) setting->data) = val;
++			break;
++		case TYPE_INTA:
++			p = (u32 *) setting->data;
++			for (i = 0; i < 1 << PARTN_BITS; i++, p++)
++				*p = val;
++			break;
++	}
++	spin_unlock_irq(&ide_lock);
++	return 0;
++}
++
++static int set_io_32bit(ide_drive_t *drive, int arg)
++{
++	drive->io_32bit = arg;
++#ifdef CONFIG_BLK_DEV_DTC2278
++	if (HWIF(drive)->chipset == ide_dtc2278)
++		HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
++#endif /* CONFIG_BLK_DEV_DTC2278 */
++	return 0;
++}
++
++static int set_using_dma (ide_drive_t *drive, int arg)
++{
++#ifdef CONFIG_BLK_DEV_IDEDMA
++	if (!drive->id || !(drive->id->capability & 1))
++		return -EPERM;
++	if (HWIF(drive)->ide_dma_check == NULL)
++		return -EPERM;
++	if (arg) {
++		if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
++		if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
++	} else {
++		if (__ide_dma_off(drive))
++			return -EIO;
++	}
++	return 0;
++#else
++	return -EPERM;
++#endif
++}
++
++static int set_pio_mode (ide_drive_t *drive, int arg)
++{
++	struct request rq;
++
++	if (!HWIF(drive)->tuneproc)
++		return -ENOSYS;
++	if (drive->special.b.set_tune)
++		return -EBUSY;
++	ide_init_drive_cmd(&rq);
++	drive->tune_req = (u8) arg;
++	drive->special.b.set_tune = 1;
++	(void) ide_do_drive_cmd(drive, &rq, ide_wait);
++	return 0;
++}
++
++static int set_xfer_rate (ide_drive_t *drive, int arg)
++{
++	int err = ide_wait_cmd(drive,
++			WIN_SETFEATURES, (u8) arg,
++			SETFEATURES_XFER, 0, NULL);
++
++	if (!err && arg) {
++		ide_set_xfer_rate(drive, (u8) arg);
++		ide_driveid_update(drive);
++	}
++	return err;
++}
++
++/**
++ *	ide_add_generic_settings	-	generic ide settings
++ *	@drive: drive being configured
++ *
++ *	Add the generic parts of the system settings to the /proc files and
++ *	ioctls for this IDE device. The caller must not be holding the
++ *	ide_setting_sem.
++ */
++
++void ide_add_generic_settings (ide_drive_t *drive)
++{
++/*
++ *			  drive		setting name		read/write access				read ioctl		write ioctl		data type	min	max				mul_factor	div_factor	data pointer			set function
++ */
++	__ide_add_setting(drive,	"io_32bit",		drive->no_io_32bit ? SETTING_READ : SETTING_RW,	HDIO_GET_32BIT,		HDIO_SET_32BIT,		TYPE_BYTE,	0,	1 + (SUPPORT_VLB_SYNC << 1),	1,		1,		&drive->io_32bit,		set_io_32bit,	0);
++	__ide_add_setting(drive,	"keepsettings",		SETTING_RW,					HDIO_GET_KEEPSETTINGS,	HDIO_SET_KEEPSETTINGS,	TYPE_BYTE,	0,	1,				1,		1,		&drive->keep_settings,		NULL,		0);
++	__ide_add_setting(drive,	"nice1",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	1,				1,		1,		&drive->nice1,			NULL,		0);
++	__ide_add_setting(drive,	"pio_mode",		SETTING_WRITE,					-1,			HDIO_SET_PIO_MODE,	TYPE_BYTE,	0,	255,				1,		1,		NULL,				set_pio_mode,	0);
++	__ide_add_setting(drive,	"unmaskirq",		drive->no_unmask ? SETTING_READ : SETTING_RW,	HDIO_GET_UNMASKINTR,	HDIO_SET_UNMASKINTR,	TYPE_BYTE,	0,	1,				1,		1,		&drive->unmask,			NULL,		0);
++	__ide_add_setting(drive,	"using_dma",		SETTING_RW,					HDIO_GET_DMA,		HDIO_SET_DMA,		TYPE_BYTE,	0,	1,				1,		1,		&drive->using_dma,		set_using_dma,	0);
++	__ide_add_setting(drive,	"init_speed",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	70,				1,		1,		&drive->init_speed,		NULL,		0);
++	__ide_add_setting(drive,	"current_speed",	SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	70,				1,		1,		&drive->current_speed,		set_xfer_rate,	0);
++	__ide_add_setting(drive,	"number",		SETTING_RW,					-1,			-1,			TYPE_BYTE,	0,	3,				1,		1,		&drive->dn,			NULL,		0);
++}
++
++/**
++ *	system_bus_clock	-	clock guess
++ *
++ *	External version of the bus clock guess used by very old IDE drivers
++ *	for things like VLB timings. Should not be used.
++ */
++
++int system_bus_clock (void)
++{
++	return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
++}
++
++EXPORT_SYMBOL(system_bus_clock);
++
++static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
++{
++	ide_drive_t *drive = dev->driver_data;
++	struct request rq;
++	struct request_pm_state rqpm;
++	ide_task_t args;
++
++	memset(&rq, 0, sizeof(rq));
++	memset(&rqpm, 0, sizeof(rqpm));
++	memset(&args, 0, sizeof(args));
++	rq.cmd_type = REQ_TYPE_PM_SUSPEND;
++	rq.special = &args;
++	rq.data = &rqpm;
++	rqpm.pm_step = ide_pm_state_start_suspend;
++	if (mesg.event == PM_EVENT_PRETHAW)
++		mesg.event = PM_EVENT_FREEZE;
++	rqpm.pm_state = mesg.event;
++
++	return ide_do_drive_cmd(drive, &rq, ide_wait);
++}
++
++static int generic_ide_resume(struct device *dev)
++{
++	ide_drive_t *drive = dev->driver_data;
++	struct request rq;
++	struct request_pm_state rqpm;
++	ide_task_t args;
++
++	memset(&rq, 0, sizeof(rq));
++	memset(&rqpm, 0, sizeof(rqpm));
++	memset(&args, 0, sizeof(args));
++	rq.cmd_type = REQ_TYPE_PM_RESUME;
++	rq.special = &args;
++	rq.data = &rqpm;
++	rqpm.pm_step = ide_pm_state_start_resume;
++	rqpm.pm_state = PM_EVENT_ON;
++
++	return ide_do_drive_cmd(drive, &rq, ide_head_wait);
++}
++
++int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
++			unsigned int cmd, unsigned long arg)
++{
++	ide_settings_t *setting;
++	ide_driver_t *drv;
++	int err = 0;
++	void __user *p = (void __user *)arg;
++
++	down(&ide_setting_sem);
++	if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
++		if (cmd == setting->read_ioctl) {
++			err = ide_read_setting(drive, setting);
++			up(&ide_setting_sem);
++			return err >= 0 ? put_user(err, (long __user *)arg) : err;
++		} else {
++			if (bdev != bdev->bd_contains)
++				err = -EINVAL;
++			else
++				err = ide_write_setting(drive, setting, arg);
++			up(&ide_setting_sem);
++			return err;
++		}
++	}
++	up(&ide_setting_sem);
++
++	switch (cmd) {
++		case HDIO_OBSOLETE_IDENTITY:
++		case HDIO_GET_IDENTITY:
++			if (bdev != bdev->bd_contains)
++				return -EINVAL;
++			if (drive->id_read == 0)
++				return -ENOMSG;
++			if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
++				return -EFAULT;
++			return 0;
++
++		case HDIO_GET_NICE:
++			return put_user(drive->dsc_overlap	<<	IDE_NICE_DSC_OVERLAP	|
++					drive->atapi_overlap	<<	IDE_NICE_ATAPI_OVERLAP	|
++					drive->nice0		<< 	IDE_NICE_0		|
++					drive->nice1		<<	IDE_NICE_1		|
++					drive->nice2		<<	IDE_NICE_2,
++					(long __user *) arg);
++
++#ifdef CONFIG_IDE_TASK_IOCTL
++		case HDIO_DRIVE_TASKFILE:
++		        if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
++				return -EACCES;
++			switch(drive->media) {
++				case ide_disk:
++					return ide_taskfile_ioctl(drive, cmd, arg);
++				default:
++					return -ENOMSG;
++			}
++#endif /* CONFIG_IDE_TASK_IOCTL */
++
++		case HDIO_DRIVE_CMD:
++			if (!capable(CAP_SYS_RAWIO))
++				return -EACCES;
++			return ide_cmd_ioctl(drive, cmd, arg);
++
++		case HDIO_DRIVE_TASK:
++			if (!capable(CAP_SYS_RAWIO))
++				return -EACCES;
++			return ide_task_ioctl(drive, cmd, arg);
++
++		case HDIO_SCAN_HWIF:
++		{
++			hw_regs_t hw;
++			int args[3];
++			if (!capable(CAP_SYS_RAWIO)) return -EACCES;
++			if (copy_from_user(args, p, 3 * sizeof(int)))
++				return -EFAULT;
++			memset(&hw, 0, sizeof(hw));
++			ide_init_hwif_ports(&hw, (unsigned long) args[0],
++					    (unsigned long) args[1], NULL);
++			hw.irq = args[2];
++			if (ide_register_hw(&hw, NULL) == -1)
++				return -EIO;
++			return 0;
++		}
++	        case HDIO_UNREGISTER_HWIF:
++			if (!capable(CAP_SYS_RAWIO)) return -EACCES;
++			/* (arg > MAX_HWIFS) checked in function */
++			ide_unregister(arg);
++			return 0;
++		case HDIO_SET_NICE:
++			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
++			if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
++				return -EPERM;
++			drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
++			drv = *(ide_driver_t **)bdev->bd_disk->private_data;
++			if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
++				drive->dsc_overlap = 0;
++				return -EPERM;
++			}
++			drive->nice1 = (arg >> IDE_NICE_1) & 1;
++			return 0;
++		case HDIO_DRIVE_RESET:
++		{
++			unsigned long flags;
++			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
++			
++			/*
++			 *	Abort the current command on the
++			 *	group if there is one, taking
++			 *	care not to allow anything else
++			 *	to be queued and to die on the
++			 *	spot if we miss one somehow
++			 */
++
++			spin_lock_irqsave(&ide_lock, flags);
++
++			if (HWGROUP(drive)->resetting) {
++				spin_unlock_irqrestore(&ide_lock, flags);
++				return -EBUSY;
++			}
++
++			ide_abort(drive, "drive reset");
++
++			BUG_ON(HWGROUP(drive)->handler);
++				
++			/* Ensure nothing gets queued after we
++			   drop the lock. Reset will clear the busy */
++		   
++			HWGROUP(drive)->busy = 1;
++			spin_unlock_irqrestore(&ide_lock, flags);
++			(void) ide_do_reset(drive);
++
++			return 0;
++		}
++
++		case CDROMEJECT:
++		case CDROMCLOSETRAY:
++			return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
++
++		case HDIO_GET_BUSSTATE:
++			if (!capable(CAP_SYS_ADMIN))
++				return -EACCES;
++			if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
++				return -EFAULT;
++			return 0;
++
++		case HDIO_SET_BUSSTATE:
++			if (!capable(CAP_SYS_ADMIN))
++				return -EACCES;
++			if (HWIF(drive)->busproc)
++				return HWIF(drive)->busproc(drive, (int)arg);
++			return -EOPNOTSUPP;
++		default:
++			return -EINVAL;
++	}
++}
++
++EXPORT_SYMBOL(generic_ide_ioctl);
++
++/*
++ * stridx() returns the offset of c within s,
++ * or -1 if c is '\0' or not found within s.
++ */
++static int __init stridx (const char *s, char c)
++{
++	char *i = strchr(s, c);
++	return (i && c) ? i - s : -1;
++}
++
++/*
++ * match_parm() does parsing for ide_setup():
++ *
++ * 1. the first char of s must be '='.
++ * 2. if the remainder matches one of the supplied keywords,
++ *     the index (1 based) of the keyword is negated and returned.
++ * 3. if the remainder is a series of no more than max_vals numbers
++ *     separated by commas, the numbers are saved in vals[] and a
++ *     count of how many were saved is returned.  Base10 is assumed,
++ *     and base16 is allowed when prefixed with "0x".
++ * 4. otherwise, zero is returned.
++ */
++static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
++{
++	static const char *decimal = "0123456789";
++	static const char *hex = "0123456789abcdef";
++	int i, n;
++
++	if (*s++ == '=') {
++		/*
++		 * Try matching against the supplied keywords,
++		 * and return -(index+1) if we match one
++		 */
++		if (keywords != NULL) {
++			for (i = 0; *keywords != NULL; ++i) {
++				if (!strcmp(s, *keywords++))
++					return -(i+1);
++			}
++		}
++		/*
++		 * Look for a series of no more than "max_vals"
++		 * numeric values separated by commas, in base10,
++		 * or base16 when prefixed with "0x".
++		 * Return a count of how many were found.
++		 */
++		for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
++			vals[n] = i;
++			while ((i = stridx(decimal, *++s)) >= 0)
++				vals[n] = (vals[n] * 10) + i;
++			if (*s == 'x' && !vals[n]) {
++				while ((i = stridx(hex, *++s)) >= 0)
++					vals[n] = (vals[n] * 0x10) + i;
++			}
++			if (++n == max_vals)
++				break;
++			if (*s == ',' || *s == ';')
++				++s;
++		}
++		if (!*s)
++			return n;
++	}
++	return 0;	/* zero = nothing matched */
++}
++
++#ifdef CONFIG_BLK_DEV_ALI14XX
++static int __initdata probe_ali14xx;
++extern int ali14xx_init(void);
++#endif
++#ifdef CONFIG_BLK_DEV_UMC8672
++static int __initdata probe_umc8672;
++extern int umc8672_init(void);
++#endif
++#ifdef CONFIG_BLK_DEV_DTC2278
++static int __initdata probe_dtc2278;
++extern int dtc2278_init(void);
++#endif
++#ifdef CONFIG_BLK_DEV_HT6560B
++static int __initdata probe_ht6560b;
++extern int ht6560b_init(void);
++#endif
++#ifdef CONFIG_BLK_DEV_QD65XX
++static int __initdata probe_qd65xx;
++extern int qd65xx_init(void);
++#endif
++
++static int __initdata is_chipset_set[MAX_HWIFS];
++
++/*
++ * ide_setup() gets called VERY EARLY during initialization,
++ * to handle kernel "command line" strings beginning with "hdx=" or "ide".
++ *
++ * Remember to update Documentation/ide.txt if you change something here.
++ */
++static int __init ide_setup(char *s)
++{
++	int i, vals[3];
++	ide_hwif_t *hwif;
++	ide_drive_t *drive;
++	unsigned int hw, unit;
++	const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
++	const char max_hwif  = '0' + (MAX_HWIFS - 1);
++
++	
++	if (strncmp(s,"hd",2) == 0 && s[2] == '=')	/* hd= is for hd.c   */
++		return 0;				/* driver and not us */
++
++	if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
++		return 0;
++
++	printk(KERN_INFO "ide_setup: %s", s);
++	init_ide_data ();
++
++#ifdef CONFIG_BLK_DEV_IDEDOUBLER
++	if (!strcmp(s, "ide=doubler")) {
++		extern int ide_doubler;
++
++		printk(" : Enabled support for IDE doublers\n");
++		ide_doubler = 1;
++		return 1;
++	}
++#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
++
++	if (!strcmp(s, "ide=nodma")) {
++		printk(" : Prevented DMA\n");
++		noautodma = 1;
++		return 1;
++	}
++
++#ifdef CONFIG_BLK_DEV_IDEPCI
++	if (!strcmp(s, "ide=reverse")) {
++		ide_scan_direction = 1;
++		printk(" : Enabled support for IDE inverse scan order.\n");
++		return 1;
++	}
++#endif /* CONFIG_BLK_DEV_IDEPCI */
++
++	/*
++	 * Look for drive options:  "hdx="
++	 */
++	if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
++		const char *hd_words[] = {
++			"none", "noprobe", "nowerr", "cdrom", "serialize",
++			"autotune", "noautotune", "minus8", "swapdata", "bswap",
++			"noflush", "remap", "remap63", "scsi", NULL };
++		unit = s[2] - 'a';
++		hw   = unit / MAX_DRIVES;
++		unit = unit % MAX_DRIVES;
++		hwif = &ide_hwifs[hw];
++		drive = &hwif->drives[unit];
++		if (strncmp(s + 4, "ide-", 4) == 0) {
++			strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
++			goto done;
++		}
++		switch (match_parm(&s[3], hd_words, vals, 3)) {
++			case -1: /* "none" */
++			case -2: /* "noprobe" */
++				drive->noprobe = 1;
++				goto done;
++			case -3: /* "nowerr" */
++				drive->bad_wstat = BAD_R_STAT;
++				hwif->noprobe = 0;
++				goto done;
++			case -4: /* "cdrom" */
++				drive->present = 1;
++				drive->media = ide_cdrom;
++				/* an ATAPI device ignores DRDY */
++				drive->ready_stat = 0;
++				hwif->noprobe = 0;
++				goto done;
++			case -5: /* "serialize" */
++				printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
++				goto do_serialize;
++			case -6: /* "autotune" */
++				drive->autotune = IDE_TUNE_AUTO;
++				goto obsolete_option;
++			case -7: /* "noautotune" */
++				drive->autotune = IDE_TUNE_NOAUTO;
++				goto obsolete_option;
++			case -9: /* "swapdata" */
++			case -10: /* "bswap" */
++				drive->bswap = 1;
++				goto done;
++			case -11: /* noflush */
++				drive->noflush = 1;
++				goto done;
++			case -12: /* "remap" */
++				drive->remap_0_to_1 = 1;
++				goto done;
++			case -13: /* "remap63" */
++				drive->sect0 = 63;
++				goto done;
++			case -14: /* "scsi" */
++				drive->scsi = 1;
++				goto done;
++			case 3: /* cyl,head,sect */
++				drive->media	= ide_disk;
++				drive->ready_stat = READY_STAT;
++				drive->cyl	= drive->bios_cyl  = vals[0];
++				drive->head	= drive->bios_head = vals[1];
++				drive->sect	= drive->bios_sect = vals[2];
++				drive->present	= 1;
++				drive->forced_geom = 1;
++				hwif->noprobe = 0;
++				goto done;
++			default:
++				goto bad_option;
++		}
++	}
++
++	if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
++		goto bad_option;
++	/*
++	 * Look for bus speed option:  "idebus="
++	 */
++	if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
++		if (match_parm(&s[6], NULL, vals, 1) != 1)
++			goto bad_option;
++		if (vals[0] >= 20 && vals[0] <= 66) {
++			idebus_parameter = vals[0];
++		} else
++			printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
++		goto done;
++	}
++	/*
++	 * Look for interface options:  "idex="
++	 */
++	if (s[3] >= '0' && s[3] <= max_hwif) {
++		/*
++		 * Be VERY CAREFUL changing this: note hardcoded indexes below
++		 * (-8, -9, -10) are reserved to ease the hardcoding.
++		 */
++		static const char *ide_words[] = {
++			"noprobe", "serialize", "autotune", "noautotune", 
++			"reset", "dma", "ata66", "minus8", "minus9",
++			"minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
++			"dtc2278", "umc8672", "ali14xx", NULL };
++		hw = s[3] - '0';
++		hwif = &ide_hwifs[hw];
++		i = match_parm(&s[4], ide_words, vals, 3);
++
++		/*
++		 * Cryptic check to ensure chipset not already set for hwif.
++		 * Note: we can't depend on hwif->chipset here.
++		 */
++		if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
++			/* chipset already specified */
++			if (is_chipset_set[hw])
++				goto bad_option;
++			if (i > -18 && i <= -11) {
++				/* these drivers are for "ide0=" only */
++				if (hw != 0)
++					goto bad_hwif;
++				/* chipset already specified for 2nd port */
++				if (is_chipset_set[hw+1])
++					goto bad_option;
++			}
++			is_chipset_set[hw] = 1;
++			printk("\n");
++		}
++
++		switch (i) {
++#ifdef CONFIG_BLK_DEV_ALI14XX
++			case -17: /* "ali14xx" */
++				probe_ali14xx = 1;
++				goto done;
++#endif
++#ifdef CONFIG_BLK_DEV_UMC8672
++			case -16: /* "umc8672" */
++				probe_umc8672 = 1;
++				goto done;
++#endif
++#ifdef CONFIG_BLK_DEV_DTC2278
++			case -15: /* "dtc2278" */
++				probe_dtc2278 = 1;
++				goto done;
++#endif
++#ifdef CONFIG_BLK_DEV_CMD640
++			case -14: /* "cmd640_vlb" */
++			{
++				extern int cmd640_vlb; /* flag for cmd640.c */
++				cmd640_vlb = 1;
++				goto done;
++			}
++#endif
++#ifdef CONFIG_BLK_DEV_HT6560B
++			case -13: /* "ht6560b" */
++				probe_ht6560b = 1;
++				goto done;
++#endif
++#ifdef CONFIG_BLK_DEV_QD65XX
++			case -12: /* "qd65xx" */
++				probe_qd65xx = 1;
++				goto done;
++#endif
++#ifdef CONFIG_BLK_DEV_4DRIVES
++			case -11: /* "four" drives on one set of ports */
++			{
++				ide_hwif_t *mate = &ide_hwifs[hw^1];
++				mate->drives[0].select.all ^= 0x20;
++				mate->drives[1].select.all ^= 0x20;
++				hwif->chipset = mate->chipset = ide_4drives;
++				mate->irq = hwif->irq;
++				memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
++				goto do_serialize;
++			}
++#endif /* CONFIG_BLK_DEV_4DRIVES */
++			case -10: /* minus10 */
++			case -9: /* minus9 */
++			case -8: /* minus8 */
++				goto bad_option;
++			case -7: /* ata66 */
++#ifdef CONFIG_BLK_DEV_IDEPCI
++				hwif->udma_four = 1;
++				goto obsolete_option;
++#else
++				goto bad_hwif;
++#endif
++			case -6: /* dma */
++				hwif->autodma = 1;
++				goto obsolete_option;
++			case -5: /* "reset" */
++				hwif->reset = 1;
++				goto obsolete_option;
++			case -4: /* "noautotune" */
++				hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
++				hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
++				goto obsolete_option;
++			case -3: /* "autotune" */
++				hwif->drives[0].autotune = IDE_TUNE_AUTO;
++				hwif->drives[1].autotune = IDE_TUNE_AUTO;
++				goto obsolete_option;
++			case -2: /* "serialize" */
++			do_serialize:
++				hwif->mate = &ide_hwifs[hw^1];
++				hwif->mate->mate = hwif;
++				hwif->serialized = hwif->mate->serialized = 1;
++				goto obsolete_option;
++
++			case -1: /* "noprobe" */
++				hwif->noprobe = 1;
++				goto done;
++
++			case 1:	/* base */
++				vals[1] = vals[0] + 0x206; /* default ctl */
++			case 2: /* base,ctl */
++				vals[2] = 0;	/* default irq = probe for it */
++			case 3: /* base,ctl,irq */
++				hwif->hw.irq = vals[2];
++				ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
++				memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
++				hwif->irq      = vals[2];
++				hwif->noprobe  = 0;
++				hwif->chipset  = ide_forced;
++				goto obsolete_option;
++
++			case 0: goto bad_option;
++			default:
++				printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
++				return 1;
++		}
++	}
++bad_option:
++	printk(" -- BAD OPTION\n");
++	return 1;
++obsolete_option:
++	printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
++	return 1;
++bad_hwif:
++	printk("-- NOT SUPPORTED ON ide%d", hw);
++done:
++	printk("\n");
++	return 1;
++}
++
++extern void pnpide_init(void);
++extern void h8300_ide_init(void);
++
++/*
++ * probe_for_hwifs() finds/initializes "known" IDE interfaces
++ */
++static void __init probe_for_hwifs (void)
++{
++#ifdef CONFIG_BLK_DEV_IDEPCI
++	ide_scan_pcibus(ide_scan_direction);
++#endif /* CONFIG_BLK_DEV_IDEPCI */
++
++#ifdef CONFIG_ETRAX_IDE
++	{
++		extern void init_e100_ide(void);
++		init_e100_ide();
++	}
++#endif /* CONFIG_ETRAX_IDE */
++#ifdef CONFIG_BLK_DEV_CMD640
++	{
++		extern void ide_probe_for_cmd640x(void);
++		ide_probe_for_cmd640x();
++	}
++#endif /* CONFIG_BLK_DEV_CMD640 */
++#ifdef CONFIG_BLK_DEV_IDE_PMAC
++	{
++		extern void pmac_ide_probe(void);
++		pmac_ide_probe();
++	}
++#endif /* CONFIG_BLK_DEV_IDE_PMAC */
++#ifdef CONFIG_BLK_DEV_GAYLE
++	{
++		extern void gayle_init(void);
++		gayle_init();
++	}
++#endif /* CONFIG_BLK_DEV_GAYLE */
++#ifdef CONFIG_BLK_DEV_FALCON_IDE
++	{
++		extern void falconide_init(void);
++		falconide_init();
++	}
++#endif /* CONFIG_BLK_DEV_FALCON_IDE */
++#ifdef CONFIG_BLK_DEV_MAC_IDE
++	{
++		extern void macide_init(void);
++		macide_init();
++	}
++#endif /* CONFIG_BLK_DEV_MAC_IDE */
++#ifdef CONFIG_BLK_DEV_Q40IDE
++	{
++		extern void q40ide_init(void);
++		q40ide_init();
++	}
++#endif /* CONFIG_BLK_DEV_Q40IDE */
++#ifdef CONFIG_BLK_DEV_BUDDHA
++	{
++		extern void buddha_init(void);
++		buddha_init();
++	}
++#endif /* CONFIG_BLK_DEV_BUDDHA */
++#ifdef CONFIG_BLK_DEV_IDEPNP
++	pnpide_init();
++#endif
++#ifdef CONFIG_H8300
++	h8300_ide_init();
++#endif
++}
++
++void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
++{
++#ifdef CONFIG_PROC_FS
++	ide_add_proc_entries(drive->proc, driver->proc, drive);
++#endif
++}
++
++EXPORT_SYMBOL(ide_register_subdriver);
++
++/**
++ *	ide_unregister_subdriver	-	disconnect drive from driver
++ *	@drive: drive to unplug
++ *	@driver: driver
++ *
++ *	Disconnect a drive from the driver it was attached to and then
++ *	clean up the various proc files and other objects attached to it.
++ *
++ *	Takes ide_setting_sem and ide_lock.
++ *	Caller must hold none of the locks.
++ */
++
++void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver)
++{
++	unsigned long flags;
++	
++	down(&ide_setting_sem);
++	spin_lock_irqsave(&ide_lock, flags);
++#ifdef CONFIG_PROC_FS
++	ide_remove_proc_entries(drive->proc, driver->proc);
++#endif
++	auto_remove_settings(drive);
++	spin_unlock_irqrestore(&ide_lock, flags);
++	up(&ide_setting_sem);
++}
++
++EXPORT_SYMBOL(ide_unregister_subdriver);
++
++/*
++ * Probe module
++ */
++
++EXPORT_SYMBOL(ide_lock);
++
++static int ide_bus_match(struct device *dev, struct device_driver *drv)
++{
++	return 1;
++}
++
++static char *media_string(ide_drive_t *drive)
++{
++	switch (drive->media) {
++	case ide_disk:
++		return "disk";
++	case ide_cdrom:
++		return "cdrom";
++	case ide_tape:
++		return "tape";
++	case ide_floppy:
++		return "floppy";
++	default:
++		return "UNKNOWN";
++	}
++}
++
++static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	return sprintf(buf, "%s\n", media_string(drive));
++}
++
++static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	return sprintf(buf, "%s\n", drive->name);
++}
++
++static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	return sprintf(buf, "ide:m-%s\n", media_string(drive));
++}
++
++static struct device_attribute ide_dev_attrs[] = {
++	__ATTR_RO(media),
++	__ATTR_RO(drivename),
++	__ATTR_RO(modalias),
++	__ATTR_NULL
++};
++
++static int ide_uevent(struct device *dev, char **envp, int num_envp,
++		      char *buffer, int buffer_size)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	int i = 0;
++	int length = 0;
++
++	add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++		       "MEDIA=%s", media_string(drive));
++	add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++		       "DRIVENAME=%s", drive->name);
++	add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
++		       "MODALIAS=ide:m-%s", media_string(drive));
++	envp[i] = NULL;
++	return 0;
++}
++
++static int generic_ide_probe(struct device *dev)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	ide_driver_t *drv = to_ide_driver(dev->driver);
++
++	return drv->probe ? drv->probe(drive) : -ENODEV;
++}
++
++static int generic_ide_remove(struct device *dev)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	ide_driver_t *drv = to_ide_driver(dev->driver);
++
++	if (drv->remove)
++		drv->remove(drive);
++
++	return 0;
++}
++
++static void generic_ide_shutdown(struct device *dev)
++{
++	ide_drive_t *drive = to_ide_device(dev);
++	ide_driver_t *drv = to_ide_driver(dev->driver);
++
++	if (dev->driver && drv->shutdown)
++		drv->shutdown(drive);
++}
++
++struct bus_type ide_bus_type = {
++	.name		= "ide",
++	.match		= ide_bus_match,
++	.uevent		= ide_uevent,
++	.probe		= generic_ide_probe,
++	.remove		= generic_ide_remove,
++	.shutdown	= generic_ide_shutdown,
++	.dev_attrs	= ide_dev_attrs,
++	.suspend	= generic_ide_suspend,
++	.resume		= generic_ide_resume,
++};
++
++EXPORT_SYMBOL_GPL(ide_bus_type);
++
++/*
++ * This is gets invoked once during initialization, to set *everything* up
++ */
++static int __init ide_init(void)
++{
++	int ret;
++
++	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
++	system_bus_speed = ide_system_bus_speed();
++
++	ret = bus_register(&ide_bus_type);
++	if (ret < 0) {
++		printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
++		return ret;
++	}
++
++	init_ide_data();
++
++#ifdef CONFIG_PROC_FS
++	proc_ide_root = proc_mkdir("ide", NULL);
++#endif
++
++#ifdef CONFIG_BLK_DEV_ALI14XX
++	if (probe_ali14xx)
++		(void)ali14xx_init();
++#endif
++#ifdef CONFIG_BLK_DEV_UMC8672
++	if (probe_umc8672)
++		(void)umc8672_init();
++#endif
++#ifdef CONFIG_BLK_DEV_DTC2278
++	if (probe_dtc2278)
++		(void)dtc2278_init();
++#endif
++#ifdef CONFIG_BLK_DEV_HT6560B
++	if (probe_ht6560b)
++		(void)ht6560b_init();
++#endif
++#ifdef CONFIG_BLK_DEV_QD65XX
++	if (probe_qd65xx)
++		(void)qd65xx_init();
++#endif
++
++	initializing = 1;
++	/* Probe for special PCI and other "known" interface chipsets. */
++	probe_for_hwifs();
++	initializing = 0;
++
++#ifdef CONFIG_PROC_FS
++	proc_ide_create();
++#endif
++	return 0;
++}
++
++#ifdef MODULE
++static char *options = NULL;
++module_param(options, charp, 0);
++MODULE_LICENSE("GPL");
++
++static void __init parse_options (char *line)
++{
++	char *next = line;
++
++	if (line == NULL || !*line)
++		return;
++	while ((line = next) != NULL) {
++ 		if ((next = strchr(line,' ')) != NULL)
++			*next++ = 0;
++		if (!ide_setup(line))
++			printk (KERN_INFO "Unknown option '%s'\n", line);
++	}
++}
++
++int __init init_module (void)
++{
++	parse_options(options);
++	return ide_init();
++}
++
++void cleanup_module (void)
++{
++	int index;
++
++	for (index = 0; index < MAX_HWIFS; ++index)
++		ide_unregister(index);
++
++#ifdef CONFIG_PROC_FS
++	proc_ide_destroy();
++#endif
++
++	bus_unregister(&ide_bus_type);
++}
++
++#else /* !MODULE */
++
++__setup("", ide_setup);
++
++module_init(ide_init);
++
++#endif /* MODULE */
+diff -purN linux.old/drivers/ide/Kconfig linux.dev/drivers/ide/Kconfig
+--- linux.old/drivers/ide/Kconfig	2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/drivers/ide/Kconfig	2007-04-09 01:15:27.570515264 +0200
+@@ -925,6 +925,14 @@ config BLK_DEV_MPC8xx_IDE
+ 
+ 	  If unsure, say N.
+ 
++config BLK_DEV_MAGICBOX_IDE
++	bool "MagicBox 2.0 CF IDE support"
++	depends on 4xx && IDE
++	help
++	  This option provides support for IDE on MagicBox 2.0 boards.
++
++	  If unsure, say N.
++
+ choice
+ 	prompt "Type of MPC8xx IDE interface"
+ 	depends on BLK_DEV_MPC8xx_IDE
+diff -purN linux.old/drivers/ide/Makefile linux.dev/drivers/ide/Makefile
+--- linux.old/drivers/ide/Makefile	2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/drivers/ide/Makefile	2007-04-09 00:23:29.332559488 +0200
+@@ -36,6 +36,7 @@ ide-core-$(CONFIG_BLK_DEV_Q40IDE)	+= leg
+ # built-in only drivers from ppc/
+ ide-core-$(CONFIG_BLK_DEV_MPC8xx_IDE)	+= ppc/mpc8xx.o
+ ide-core-$(CONFIG_BLK_DEV_IDE_PMAC)	+= ppc/pmac.o
++ide-core-$(CONFIG_BLK_DEV_MAGICBOX_IDE)	+= ppc/magicbox_ide.o
+ 
+ # built-in only drivers from h8300/
+ ide-core-$(CONFIG_H8300)		+= h8300/ide-h8300.o
+diff -purN linux.old/drivers/ide/ppc/magicbox_ide.c linux.dev/drivers/ide/ppc/magicbox_ide.c
+--- linux.old/drivers/ide/ppc/magicbox_ide.c	1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/ide/ppc/magicbox_ide.c	2007-04-09 01:25:39.119545680 +0200
+@@ -0,0 +1,149 @@
++/* Driver for MagicBox 2.0 onboard CompactFlash adapter.
++ * Written by Wojtek Kaniewski <wojtekka@toxygen.net>
++ *
++ * GNU General Public License.
++ */
++
++#include <linux/types.h>
++#include <linux/mm.h>
++#include <linux/interrupt.h>
++#include <linux/blkdev.h>
++#include <linux/hdreg.h>
++#include <linux/ide.h>
++#include <linux/delay.h>
++#include <linux/platform_device.h>
++
++
++#define UIC0_PR 0xc4
++#define UIC0_TR 0xc5
++#define IRQ 25
++
++static int ide_offsets[IDE_NR_PORTS] = {0, 2, 4, 6, 8, 10, 12, 14, -1, -1};
++
++static u8 magicbox_ide_inb (unsigned long port)
++{
++	return (u8) (readw((void __iomem *) port) >> 8) & 255;
++}
++
++static u16 magicbox_ide_inw (unsigned long port)
++{
++	return (u16) readw((void __iomem *) port);
++}
++
++static void magicbox_ide_insw (unsigned long port, void *addr, u32 count)
++{
++	u16 *ptr;
++
++	for (ptr = addr; count--; ptr++)
++		*ptr = readw((void __iomem *) port);
++}
++
++static u32 magicbox_ide_inl (unsigned long port)
++{
++	return (u32) readl((void __iomem *) port);
++}
++
++static void magicbox_ide_insl (unsigned long port, void *addr, u32 count)
++{
++	u32 *ptr;
++
++	for (ptr = addr; count--; ptr++)
++		*ptr = readl((void __iomem *) port);
++}
++
++static void magicbox_ide_outb (u8 value, unsigned long port)
++{
++	writew(value << 8, (void __iomem *) port);
++}
++
++static void magicbox_ide_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
++{
++	writew(value << 8, (void __iomem *) port);
++}
++
++static void magicbox_ide_outw (u16 value, unsigned long port)
++{
++	writew(value, (void __iomem *) port);
++}
++
++static void magicbox_ide_outsw (unsigned long port, void *addr, u32 count)
++{
++	u16 *ptr;
++
++	for (ptr = addr; count--; ptr++)
++		writew(*ptr, (void __iomem *) port);
++}
++
++static void magicbox_ide_outl (u32 value, unsigned long port)
++{
++	writel(value, (void __iomem *) port);
++}
++
++static void magicbox_ide_outsl (unsigned long port, void *addr, u32 count)
++{
++	u32 *ptr;
++
++	for (ptr = addr; count--; ptr++)
++		writel(*ptr, (void __iomem *) port);
++}
++
++
++static void __init ide_magicbox_register(unsigned long addr,
++					 unsigned long caddr, int irq)
++{
++	hw_regs_t hw;
++	ide_hwif_t *hwif;
++
++  	memset(&hw, 0, sizeof(hw));
++	ide_setup_ports(&hw, addr, ide_offsets, caddr + 12, 0, NULL,irq);
++
++	if (ide_register_hw(&hw, &hwif) != -1)
++	{
++		printk(KERN_NOTICE "magicbox-ide: Registered IDE-CF driver\n");
++		hwif->mmio = 2;
++		hwif->drives[0].unmask = 1;
++		hwif->OUTB = magicbox_ide_outb;
++		hwif->OUTBSYNC = magicbox_ide_outbsync;
++		hwif->OUTW = magicbox_ide_outw;
++		hwif->OUTL = magicbox_ide_outl;
++		hwif->OUTSW = magicbox_ide_outsw;
++		hwif->OUTSL = magicbox_ide_outsl;
++		hwif->INB = magicbox_ide_inb;
++		hwif->INW = magicbox_ide_inw;
++		hwif->INL = magicbox_ide_inl;
++		hwif->INSW = magicbox_ide_insw;
++		hwif->INSL = magicbox_ide_insl;
++	}
++}
++
++void __init ide_magicbox_init(void)
++{
++	volatile u16 *addr;
++	volatile u16 *caddr;
++
++	/* Turn on PerWE instead of PCIsomething */
++	mtdcr(DCRN_CPC0_PCI_BASE, mfdcr(DCRN_CPC0_PCI_BASE) | (0x80000000L >> 27));
++
++	/* PerCS1 (CF's CS0): base 0xff100000, 16-bit, rw */
++	mtdcr(DCRN_EBC_BASE, 1);
++	mtdcr(DCRN_EBC_BASE + 1, 0xff11a000);
++	mtdcr(DCRN_EBC_BASE, 0x11);
++	mtdcr(DCRN_EBC_BASE + 1, 0x080bd800);
++
++	/* PerCS2 (CF's CS1): base 0xff200000, 16-bit, rw */
++	mtdcr(DCRN_EBC_BASE, 2);
++	mtdcr(DCRN_EBC_BASE + 1, 0xff21a000);
++	mtdcr(DCRN_EBC_BASE, 0x12);
++	mtdcr(DCRN_EBC_BASE + 1, 0x080bd800);
++
++	/* Remap physical address space */
++	addr = ioremap_nocache(0xff100000, 4096);
++	caddr = ioremap_nocache(0xff200000, 4096);
++
++	/* Set interrupt to low-to-high-edge-triggered */
++	mtdcr(UIC0_TR, mfdcr(UIC0_TR) & ~(0x80000000L >> IRQ));
++	mtdcr(UIC0_PR, mfdcr(UIC0_PR) | (0x80000000L >> IRQ));
++
++	ide_magicbox_register((unsigned long)addr, (unsigned long)caddr, IRQ);
++}
++