Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
new file mode 100644
index 0000000..973dec7
--- /dev/null
+++ b/drivers/ide/ide.c
@@ -0,0 +1,2269 @@
+/*
+ * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
+ *
+ * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
+ */
+
+/*
+ * Mostly written by Mark Lord <mlord@pobox.com>
+ * and Gadi Oxman <gadio@netvision.net.il>
+ * and Andre Hedrick <andre@linux-ide.org>
+ *
+ * See linux/MAINTAINERS for address of current maintainer.
+ *
+ * This is the multiple IDE interface driver, as evolved from hd.c.
+ * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
+ * (usually 14 & 15).
+ * There can be up to two drives per interface, as per the ATA-2 spec.
+ *
+ * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
+ * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
+ * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
+ * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
+ * ...
+ *
+ * From hd.c:
+ * |
+ * | It traverses the request-list, using interrupts to jump between functions.
+ * | As nearly all functions can be called within interrupts, we may not sleep.
+ * | Special care is recommended. Have Fun!
+ * |
+ * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
+ * |
+ * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
+ * | in the early extended-partition checks and added DM partitions.
+ * |
+ * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
+ * |
+ * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
+ * | and general streamlining by Mark Lord (mlord@pobox.com).
+ *
+ * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
+ *
+ * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
+ * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
+ * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
+ *
+ * This was a rewrite of just about everything from hd.c, though some original
+ * code is still sprinkled about. Think of it as a major evolution, with
+ * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
+ *
+ * Version 1.0 ALPHA initial code, primary i/f working okay
+ * Version 1.3 BETA dual i/f on shared irq tested & working!
+ * Version 1.4 BETA added auto probing for irq(s)
+ * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
+ * ...
+ * Version 5.50 allow values as small as 20 for idebus=
+ * Version 5.51 force non io_32bit in drive_cmd_intr()
+ * change delay_10ms() to delay_50ms() to fix problems
+ * Version 5.52 fix incorrect invalidation of removable devices
+ * add "hdx=slow" command line option
+ * Version 5.60 start to modularize the driver; the disk and ATAPI
+ * drivers can be compiled as loadable modules.
+ * move IDE probe code to ide-probe.c
+ * move IDE disk code to ide-disk.c
+ * add support for generic IDE device subdrivers
+ * add m68k code from Geert Uytterhoeven
+ * probe all interfaces by default
+ * add ioctl to (re)probe an interface
+ * Version 6.00 use per device request queues
+ * attempt to optimize shared hwgroup performance
+ * add ioctl to manually adjust bandwidth algorithms
+ * add kerneld support for the probe module
+ * fix bug in ide_error()
+ * fix bug in the first ide_get_lock() call for Atari
+ * don't flush leftover data for ATAPI devices
+ * Version 6.01 clear hwgroup->active while the hwgroup sleeps
+ * support HDIO_GETGEO for floppies
+ * Version 6.02 fix ide_ack_intr() call
+ * check partition table on floppies
+ * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
+ * Version 6.10 deleted old entries from this list of updates
+ * replaced triton.c with ide-dma.c generic PCI DMA
+ * added support for BIOS-enabled UltraDMA
+ * rename all "promise" things to "pdc4030"
+ * fix EZ-DRIVE handling on small disks
+ * Version 6.11 fix probe error in ide_scan_devices()
+ * fix ancient "jiffies" polling bugs
+ * mask all hwgroup interrupts on each irq entry
+ * Version 6.12 integrate ioctl and proc interfaces
+ * fix parsing of "idex=" command line parameter
+ * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
+ * Version 6.14 fixed IRQ sharing among PCI devices
+ * Version 6.15 added SMP awareness to IDE drivers
+ * Version 6.16 fixed various bugs; even more SMP friendly
+ * Version 6.17 fix for newest EZ-Drive problem
+ * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
+ * Version 6.19 Re-design for a UNIFORM driver for all platforms,
+ * model based on suggestions from Russell King and
+ * Geert Uytterhoeven
+ * Promise DC4030VL now supported.
+ * add support for ide6/ide7
+ * delay_50ms() changed to ide_delay_50ms() and exported.
+ * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
+ * Added hdx=flash to allow for second flash disk
+ * detection w/o the hang loop.
+ * Added support for ide8/ide9
+ * Added idex=ata66 for the quirky chipsets that are
+ * ATA-66 compliant, but have yet to determine a method
+ * of verification of the 80c cable presence.
+ * Specifically Promise's PDC20262 chipset.
+ * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
+ * hat that clarified original low level driver design.
+ * Version 6.30 Added SMP support; fixed multmode issues. -ml
+ * Version 6.31 Debug Share INTR's and request queue streaming
+ * Native ATA-100 support
+ * Prep for Cascades Project
+ * Version 7.00alpha First named revision of ide rearrange
+ *
+ * Some additional driver compile-time options are in ./include/linux/ide.h
+ *
+ * To do, in likely order of completion:
+ * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
+ *
+ */
+
+#define REVISION "Revision: 7.00alpha2"
+#define VERSION "Id: ide.c 7.00a2 20020906"
+
+#undef REALLY_SLOW_IO /* most systems can safely undef this */
+
+#define _IDE_C /* Tell ide.h it's really us */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/completion.h>
+#include <linux/reboot.h>
+#include <linux/cdrom.h>
+#include <linux/seq_file.h>
+#include <linux/device.h>
+#include <linux/bitops.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+/* default maximum number of failures */
+#define IDE_DEFAULT_MAX_FAILURES 1
+
+static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
+ IDE2_MAJOR, IDE3_MAJOR,
+ IDE4_MAJOR, IDE5_MAJOR,
+ IDE6_MAJOR, IDE7_MAJOR,
+ IDE8_MAJOR, IDE9_MAJOR };
+
+static int idebus_parameter; /* holds the "idebus=" parameter */
+static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
+static int initializing; /* set while initializing built-in drivers */
+
+DECLARE_MUTEX(ide_cfg_sem);
+ __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
+#endif
+
+#ifdef CONFIG_IDEDMA_AUTO
+int noautodma = 0;
+#else
+int noautodma = 1;
+#endif
+
+EXPORT_SYMBOL(noautodma);
+
+/*
+ * This is declared extern in ide.h, for access by other IDE modules:
+ */
+ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
+
+EXPORT_SYMBOL(ide_hwifs);
+
+static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives);
+
+/*
+ * Do not even *think* about calling this!
+ */
+static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
+{
+ unsigned int unit;
+
+ /* bulk initialize hwif & drive info with zeros */
+ memset(hwif, 0, sizeof(ide_hwif_t));
+
+ /* fill in any non-zero initial values */
+ hwif->index = index;
+ hwif->major = ide_hwif_to_major[index];
+
+ hwif->name[0] = 'i';
+ hwif->name[1] = 'd';
+ hwif->name[2] = 'e';
+ hwif->name[3] = '0' + index;
+
+ hwif->bus_state = BUSSTATE_ON;
+
+ hwif->atapi_dma = 0; /* disable all atapi dma */
+ hwif->ultra_mask = 0x80; /* disable all ultra */
+ hwif->mwdma_mask = 0x80; /* disable all mwdma */
+ hwif->swdma_mask = 0x80; /* disable all swdma */
+
+ sema_init(&hwif->gendev_rel_sem, 0);
+
+ default_hwif_iops(hwif);
+ default_hwif_transport(hwif);
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ ide_drive_t *drive = &hwif->drives[unit];
+
+ drive->media = ide_disk;
+ drive->select.all = (unit<<4)|0xa0;
+ drive->hwif = hwif;
+ drive->ctl = 0x08;
+ drive->ready_stat = READY_STAT;
+ drive->bad_wstat = BAD_W_STAT;
+ drive->special.b.recalibrate = 1;
+ drive->special.b.set_geometry = 1;
+ drive->name[0] = 'h';
+ drive->name[1] = 'd';
+ drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
+ drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
+ drive->using_dma = 0;
+ drive->is_flash = 0;
+ drive->vdma = 0;
+ INIT_LIST_HEAD(&drive->list);
+ sema_init(&drive->gendev_rel_sem, 0);
+ }
+}
+
+static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
+{
+ hw_regs_t hw;
+
+ memset(&hw, 0, sizeof(hw_regs_t));
+
+ ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
+
+ memcpy(&hwif->hw, &hw, sizeof(hw));
+ memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
+
+ hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
+#ifdef CONFIG_BLK_DEV_HD
+ if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
+ hwif->noprobe = 1; /* may be overridden by ide_setup() */
+#endif
+}
+
+extern void ide_arm_init(void);
+
+/*
+ * init_ide_data() sets reasonable default values into all fields
+ * of all instances of the hwifs and drives, but only on the first call.
+ * Subsequent calls have no effect (they don't wipe out anything).
+ *
+ * This routine is normally called at driver initialization time,
+ * but may also be called MUCH earlier during kernel "command-line"
+ * parameter processing. As such, we cannot depend on any other parts
+ * of the kernel (such as memory allocation) to be functioning yet.
+ *
+ * This is too bad, as otherwise we could dynamically allocate the
+ * ide_drive_t structs as needed, rather than always consuming memory
+ * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
+ *
+ * FIXME: We should stuff the setup data into __init and copy the
+ * relevant hwifs/allocate them properly during boot.
+ */
+#define MAGIC_COOKIE 0x12345678
+static void __init init_ide_data (void)
+{
+ ide_hwif_t *hwif;
+ unsigned int index;
+ static unsigned long magic_cookie = MAGIC_COOKIE;
+
+ if (magic_cookie != MAGIC_COOKIE)
+ return; /* already initialized */
+ magic_cookie = 0;
+
+ /* Initialise all interface structures */
+ for (index = 0; index < MAX_HWIFS; ++index) {
+ hwif = &ide_hwifs[index];
+ init_hwif_data(hwif, index);
+ init_hwif_default(hwif, index);
+#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
+ hwif->irq = hwif->hw.irq =
+ ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
+#endif
+ }
+#ifdef CONFIG_IDE_ARM
+ initializing = 1;
+ ide_arm_init();
+ initializing = 0;
+#endif
+}
+
+/**
+ * ide_system_bus_speed - guess bus speed
+ *
+ * ide_system_bus_speed() returns what we think is the system VESA/PCI
+ * bus speed (in MHz). This is used for calculating interface PIO timings.
+ * The default is 40 for known PCI systems, 50 otherwise.
+ * The "idebus=xx" parameter can be used to override this value.
+ * The actual value to be used is computed/displayed the first time
+ * through. Drivers should only use this as a last resort.
+ *
+ * Returns a guessed speed in MHz.
+ */
+
+static int ide_system_bus_speed(void)
+{
+#ifdef CONFIG_PCI
+ static struct pci_device_id pci_default[] = {
+ { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
+ { }
+ };
+#else
+#define pci_default 0
+#endif /* CONFIG_PCI */
+
+ if (!system_bus_speed) {
+ if (idebus_parameter) {
+ /* user supplied value */
+ system_bus_speed = idebus_parameter;
+ } else if (pci_dev_present(pci_default)) {
+ /* safe default value for PCI */
+ system_bus_speed = 33;
+ } else {
+ /* safe default value for VESA and PCI */
+ system_bus_speed = 50;
+ }
+ printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
+ "for PIO modes%s\n", system_bus_speed,
+ idebus_parameter ? "" : "; override with idebus=xx");
+ }
+ return system_bus_speed;
+}
+
+/*
+ * drives_lock protects the list of drives, drivers_lock the
+ * list of drivers. Currently nobody takes both at once.
+ */
+
+static DEFINE_SPINLOCK(drives_lock);
+static DEFINE_SPINLOCK(drivers_lock);
+static LIST_HEAD(drivers);
+
+/* Iterator for the driver list. */
+
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+ struct list_head *p;
+ loff_t l = *pos;
+ spin_lock(&drivers_lock);
+ list_for_each(p, &drivers)
+ if (!l--)
+ return list_entry(p, ide_driver_t, drivers);
+ return NULL;
+}
+
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct list_head *p = ((ide_driver_t *)v)->drivers.next;
+ (*pos)++;
+ return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers);
+}
+
+static void m_stop(struct seq_file *m, void *v)
+{
+ spin_unlock(&drivers_lock);
+}
+
+static int show_driver(struct seq_file *m, void *v)
+{
+ ide_driver_t *driver = v;
+ seq_printf(m, "%s version %s\n", driver->name, driver->version);
+ return 0;
+}
+
+struct seq_operations ide_drivers_op = {
+ .start = m_start,
+ .next = m_next,
+ .stop = m_stop,
+ .show = show_driver
+};
+
+#ifdef CONFIG_PROC_FS
+struct proc_dir_entry *proc_ide_root;
+#endif
+
+static struct resource* hwif_request_region(ide_hwif_t *hwif,
+ unsigned long addr, int num)
+{
+ struct resource *res = request_region(addr, num, hwif->name);
+
+ if (!res)
+ printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+ hwif->name, addr, addr+num-1);
+ return res;
+}
+
+/**
+ * ide_hwif_request_regions - request resources for IDE
+ * @hwif: interface to use
+ *
+ * Requests all the needed resources for an interface.
+ * Right now core IDE code does this work which is deeply wrong.
+ * MMIO leaves it to the controller driver,
+ * PIO will migrate this way over time.
+ */
+
+int ide_hwif_request_regions(ide_hwif_t *hwif)
+{
+ unsigned long addr;
+ unsigned int i;
+
+ if (hwif->mmio == 2)
+ return 0;
+ BUG_ON(hwif->mmio == 1);
+ addr = hwif->io_ports[IDE_CONTROL_OFFSET];
+ if (addr && !hwif_request_region(hwif, addr, 1))
+ goto control_region_busy;
+ hwif->straight8 = 0;
+ addr = hwif->io_ports[IDE_DATA_OFFSET];
+ if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
+ if (!hwif_request_region(hwif, addr, 8))
+ goto data_region_busy;
+ hwif->straight8 = 1;
+ return 0;
+ }
+ for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
+ addr = hwif->io_ports[i];
+ if (!hwif_request_region(hwif, addr, 1)) {
+ while (--i)
+ release_region(addr, 1);
+ goto data_region_busy;
+ }
+ }
+ return 0;
+
+data_region_busy:
+ addr = hwif->io_ports[IDE_CONTROL_OFFSET];
+ if (addr)
+ release_region(addr, 1);
+control_region_busy:
+ /* If any errors are return, we drop the hwif interface. */
+ return -EBUSY;
+}
+
+/**
+ * ide_hwif_release_regions - free IDE resources
+ *
+ * Note that we only release the standard ports,
+ * and do not even try to handle any extra ports
+ * allocated for weird IDE interface chipsets.
+ *
+ * Note also that we don't yet handle mmio resources here. More
+ * importantly our caller should be doing this so we need to
+ * restructure this as a helper function for drivers.
+ */
+
+void ide_hwif_release_regions(ide_hwif_t *hwif)
+{
+ u32 i = 0;
+
+ if (hwif->mmio == 2)
+ return;
+ if (hwif->io_ports[IDE_CONTROL_OFFSET])
+ release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
+ if (hwif->straight8) {
+ release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
+ return;
+ }
+ for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
+ if (hwif->io_ports[i])
+ release_region(hwif->io_ports[i], 1);
+}
+
+/**
+ * ide_hwif_restore - restore hwif to template
+ * @hwif: hwif to update
+ * @tmp_hwif: template
+ *
+ * Restore hwif to a previous state by copying most settngs
+ * from the template.
+ */
+
+static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
+{
+ hwif->hwgroup = tmp_hwif->hwgroup;
+
+ hwif->gendev.parent = tmp_hwif->gendev.parent;
+
+ hwif->proc = tmp_hwif->proc;
+
+ hwif->major = tmp_hwif->major;
+ hwif->straight8 = tmp_hwif->straight8;
+ hwif->bus_state = tmp_hwif->bus_state;
+
+ hwif->atapi_dma = tmp_hwif->atapi_dma;
+ hwif->ultra_mask = tmp_hwif->ultra_mask;
+ hwif->mwdma_mask = tmp_hwif->mwdma_mask;
+ hwif->swdma_mask = tmp_hwif->swdma_mask;
+
+ hwif->chipset = tmp_hwif->chipset;
+ hwif->hold = tmp_hwif->hold;
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+ hwif->pci_dev = tmp_hwif->pci_dev;
+ hwif->cds = tmp_hwif->cds;
+#endif
+
+ hwif->tuneproc = tmp_hwif->tuneproc;
+ hwif->speedproc = tmp_hwif->speedproc;
+ hwif->selectproc = tmp_hwif->selectproc;
+ hwif->reset_poll = tmp_hwif->reset_poll;
+ hwif->pre_reset = tmp_hwif->pre_reset;
+ hwif->resetproc = tmp_hwif->resetproc;
+ hwif->intrproc = tmp_hwif->intrproc;
+ hwif->maskproc = tmp_hwif->maskproc;
+ hwif->quirkproc = tmp_hwif->quirkproc;
+ hwif->busproc = tmp_hwif->busproc;
+
+ hwif->ata_input_data = tmp_hwif->ata_input_data;
+ hwif->ata_output_data = tmp_hwif->ata_output_data;
+ hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
+ hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
+
+ hwif->dma_setup = tmp_hwif->dma_setup;
+ hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
+ hwif->dma_start = tmp_hwif->dma_start;
+ hwif->ide_dma_end = tmp_hwif->ide_dma_end;
+ hwif->ide_dma_check = tmp_hwif->ide_dma_check;
+ hwif->ide_dma_on = tmp_hwif->ide_dma_on;
+ hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly;
+ hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
+ hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on;
+ hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off;
+ hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq;
+ hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout;
+
+ hwif->OUTB = tmp_hwif->OUTB;
+ hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
+ hwif->OUTW = tmp_hwif->OUTW;
+ hwif->OUTL = tmp_hwif->OUTL;
+ hwif->OUTSW = tmp_hwif->OUTSW;
+ hwif->OUTSL = tmp_hwif->OUTSL;
+
+ hwif->INB = tmp_hwif->INB;
+ hwif->INW = tmp_hwif->INW;
+ hwif->INL = tmp_hwif->INL;
+ hwif->INSW = tmp_hwif->INSW;
+ hwif->INSL = tmp_hwif->INSL;
+
+ hwif->sg_max_nents = tmp_hwif->sg_max_nents;
+
+ hwif->mmio = tmp_hwif->mmio;
+ hwif->rqsize = tmp_hwif->rqsize;
+ hwif->no_lba48 = tmp_hwif->no_lba48;
+
+#ifndef CONFIG_BLK_DEV_IDECS
+ hwif->irq = tmp_hwif->irq;
+#endif
+
+ hwif->dma_base = tmp_hwif->dma_base;
+ hwif->dma_master = tmp_hwif->dma_master;
+ hwif->dma_command = tmp_hwif->dma_command;
+ hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
+ hwif->dma_status = tmp_hwif->dma_status;
+ hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
+ hwif->dma_prdtable = tmp_hwif->dma_prdtable;
+
+ hwif->dma_extra = tmp_hwif->dma_extra;
+ hwif->config_data = tmp_hwif->config_data;
+ hwif->select_data = tmp_hwif->select_data;
+ hwif->autodma = tmp_hwif->autodma;
+ hwif->udma_four = tmp_hwif->udma_four;
+ hwif->no_dsc = tmp_hwif->no_dsc;
+
+ hwif->hwif_data = tmp_hwif->hwif_data;
+}
+
+/**
+ * ide_unregister - free an ide interface
+ * @index: index of interface (will change soon to a pointer)
+ *
+ * Perform the final unregister of an IDE interface. At the moment
+ * we don't refcount interfaces so this will also get split up.
+ *
+ * Locking:
+ * The caller must not hold the IDE locks
+ * The drive present/vanishing is not yet properly locked
+ * Take care with the callbacks. These have been split to avoid
+ * deadlocking the IDE layer. The shutdown callback is called
+ * before we take the lock and free resources. It is up to the
+ * caller to be sure there is no pending I/O here, and that
+ * the interfce will not be reopened (present/vanishing locking
+ * isnt yet done btw). After we commit to the final kill we
+ * call the cleanup callback with the ide locks held.
+ *
+ * Unregister restores the hwif structures to the default state.
+ * This is raving bonkers.
+ */
+
+void ide_unregister(unsigned int index)
+{
+ ide_drive_t *drive;
+ ide_hwif_t *hwif, *g;
+ static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */
+ ide_hwgroup_t *hwgroup;
+ int irq_count = 0, unit, i;
+
+ BUG_ON(index >= MAX_HWIFS);
+
+ BUG_ON(in_interrupt());
+ BUG_ON(irqs_disabled());
+ down(&ide_cfg_sem);
+ spin_lock_irq(&ide_lock);
+ hwif = &ide_hwifs[index];
+ if (!hwif->present)
+ goto abort;
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ drive = &hwif->drives[unit];
+ if (!drive->present)
+ continue;
+ if (drive->usage || DRIVER(drive)->busy)
+ goto abort;
+ drive->dead = 1;
+ }
+ hwif->present = 0;
+
+ spin_unlock_irq(&ide_lock);
+
+ for (unit = 0; unit < MAX_DRIVES; ++unit) {
+ drive = &hwif->drives[unit];
+ if (!drive->present)
+ continue;
+ DRIVER(drive)->cleanup(drive);
+ }
+
+ destroy_proc_ide_interface(hwif);
+
+ hwgroup = hwif->hwgroup;
+ /*
+ * free the irq if we were the only hwif using it
+ */
+ g = hwgroup->hwif;
+ do {
+ if (g->irq == hwif->irq)
+ ++irq_count;
+ g = g->next;
+ } while (g != hwgroup->hwif);
+ if (irq_count == 1)
+ free_irq(hwif->irq, hwgroup);
+
+ spin_lock_irq(&ide_lock);
+ /*
+ * Note that we only release the standard ports,
+ * and do not even try to handle any extra ports
+ * allocated for weird IDE interface chipsets.
+ */
+ ide_hwif_release_regions(hwif);
+
+ /*
+ * Remove us from the hwgroup, and free
+ * the hwgroup if we were the only member
+ */
+ for (i = 0; i < MAX_DRIVES; ++i) {
+ drive = &hwif->drives[i];
+ if (drive->devfs_name[0] != '\0') {
+ devfs_remove(drive->devfs_name);
+ drive->devfs_name[0] = '\0';
+ }
+ if (!drive->present)
+ continue;
+ if (drive == drive->next) {
+ /* special case: last drive from hwgroup. */
+ BUG_ON(hwgroup->drive != drive);
+ hwgroup->drive = NULL;
+ } else {
+ ide_drive_t *walk;
+
+ walk = hwgroup->drive;
+ while (walk->next != drive)
+ walk = walk->next;
+ walk->next = drive->next;
+ if (hwgroup->drive == drive) {
+ hwgroup->drive = drive->next;
+ hwgroup->hwif = HWIF(hwgroup->drive);
+ }
+ }
+ BUG_ON(hwgroup->drive == drive);
+ if (drive->id != NULL) {
+ kfree(drive->id);
+ drive->id = NULL;
+ }
+ drive->present = 0;
+ /* Messed up locking ... */
+ spin_unlock_irq(&ide_lock);
+ blk_cleanup_queue(drive->queue);
+ device_unregister(&drive->gendev);
+ down(&drive->gendev_rel_sem);
+ spin_lock_irq(&ide_lock);
+ drive->queue = NULL;
+ }
+ if (hwif->next == hwif) {
+ BUG_ON(hwgroup->hwif != hwif);
+ kfree(hwgroup);
+ } else {
+ /* There is another interface in hwgroup.
+ * Unlink us, and set hwgroup->drive and ->hwif to
+ * something sane.
+ */
+ g = hwgroup->hwif;
+ while (g->next != hwif)
+ g = g->next;
+ g->next = hwif->next;
+ if (hwgroup->hwif == hwif) {
+ /* Chose a random hwif for hwgroup->hwif.
+ * It's guaranteed that there are no drives
+ * left in the hwgroup.
+ */
+ BUG_ON(hwgroup->drive != NULL);
+ hwgroup->hwif = g;
+ }
+ BUG_ON(hwgroup->hwif == hwif);
+ }
+
+ /* More messed up locking ... */
+ spin_unlock_irq(&ide_lock);
+ device_unregister(&hwif->gendev);
+ down(&hwif->gendev_rel_sem);
+
+ /*
+ * Remove us from the kernel's knowledge
+ */
+ blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
+ kfree(hwif->sg_table);
+ unregister_blkdev(hwif->major, hwif->name);
+ spin_lock_irq(&ide_lock);
+
+ if (hwif->dma_base) {
+ (void) ide_release_dma(hwif);
+
+ hwif->dma_base = 0;
+ hwif->dma_master = 0;
+ hwif->dma_command = 0;
+ hwif->dma_vendor1 = 0;
+ hwif->dma_status = 0;
+ hwif->dma_vendor3 = 0;
+ hwif->dma_prdtable = 0;
+ }
+
+ /* copy original settings */
+ tmp_hwif = *hwif;
+
+ /* restore hwif data to pristine status */
+ init_hwif_data(hwif, index);
+ init_hwif_default(hwif, index);
+
+ ide_hwif_restore(hwif, &tmp_hwif);
+
+abort:
+ spin_unlock_irq(&ide_lock);
+ up(&ide_cfg_sem);
+}
+
+EXPORT_SYMBOL(ide_unregister);
+
+
+/**
+ * ide_setup_ports - set up IDE interface ports
+ * @hw: register descriptions
+ * @base: base register
+ * @offsets: table of register offsets
+ * @ctrl: control register
+ * @ack_irq: IRQ ack
+ * @irq: interrupt lie
+ *
+ * Setup hw_regs_t structure described by parameters. You
+ * may set up the hw structure yourself OR use this routine to
+ * do it for you. This is basically a helper
+ *
+ */
+
+void ide_setup_ports ( hw_regs_t *hw,
+ unsigned long base, int *offsets,
+ unsigned long ctrl, unsigned long intr,
+ ide_ack_intr_t *ack_intr,
+/*
+ * ide_io_ops_t *iops,
+ */
+ int irq)
+{
+ int i;
+
+ for (i = 0; i < IDE_NR_PORTS; i++) {
+ if (offsets[i] == -1) {
+ switch(i) {
+ case IDE_CONTROL_OFFSET:
+ hw->io_ports[i] = ctrl;
+ break;
+#if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
+ case IDE_IRQ_OFFSET:
+ hw->io_ports[i] = intr;
+ break;
+#endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
+ default:
+ hw->io_ports[i] = 0;
+ break;
+ }
+ } else {
+ hw->io_ports[i] = base + offsets[i];
+ }
+ }
+ hw->irq = irq;
+ hw->dma = NO_DMA;
+ hw->ack_intr = ack_intr;
+/*
+ * hw->iops = iops;
+ */
+}
+
+/**
+ * ide_register_hw_with_fixup - register IDE interface
+ * @hw: hardware registers
+ * @hwifp: pointer to returned hwif
+ * @fixup: fixup function
+ *
+ * Register an IDE interface, specifying exactly the registers etc.
+ * Set init=1 iff calling before probes have taken place.
+ *
+ * Returns -1 on error.
+ */
+
+int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif))
+{
+ int index, retry = 1;
+ ide_hwif_t *hwif;
+
+ do {
+ for (index = 0; index < MAX_HWIFS; ++index) {
+ hwif = &ide_hwifs[index];
+ if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
+ goto found;
+ }
+ for (index = 0; index < MAX_HWIFS; ++index) {
+ hwif = &ide_hwifs[index];
+ if (hwif->hold)
+ continue;
+ if ((!hwif->present && !hwif->mate && !initializing) ||
+ (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing))
+ goto found;
+ }
+ for (index = 0; index < MAX_HWIFS; index++)
+ ide_unregister(index);
+ } while (retry--);
+ return -1;
+found:
+ if (hwif->present)
+ ide_unregister(index);
+ else if (!hwif->hold) {
+ init_hwif_data(hwif, index);
+ init_hwif_default(hwif, index);
+ }
+ if (hwif->present)
+ return -1;
+ memcpy(&hwif->hw, hw, sizeof(*hw));
+ memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
+ hwif->irq = hw->irq;
+ hwif->noprobe = 0;
+ hwif->chipset = hw->chipset;
+
+ if (!initializing) {
+ probe_hwif_init_with_fixup(hwif, fixup);
+ create_proc_ide_interfaces();
+ }
+
+ if (hwifp)
+ *hwifp = hwif;
+
+ return (initializing || hwif->present) ? index : -1;
+}
+
+EXPORT_SYMBOL(ide_register_hw_with_fixup);
+
+int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp)
+{
+ return ide_register_hw_with_fixup(hw, hwifp, NULL);
+}
+
+EXPORT_SYMBOL(ide_register_hw);
+
+/*
+ * Locks for IDE setting functionality
+ */
+
+DECLARE_MUTEX(ide_setting_sem);
+
+/**
+ * __ide_add_setting - add an ide setting option
+ * @drive: drive to use
+ * @name: setting name
+ * @rw: true if the function is read write
+ * @read_ioctl: function to call on read
+ * @write_ioctl: function to call on write
+ * @data_type: type of data
+ * @min: range minimum
+ * @max: range maximum
+ * @mul_factor: multiplication scale
+ * @div_factor: divison scale
+ * @data: private data field
+ * @set: setting
+ * @auto_remove: setting auto removal flag
+ *
+ * Removes the setting named from the device if it is present.
+ * The function takes the settings_lock to protect against
+ * parallel changes. This function must not be called from IRQ
+ * context. Returns 0 on success or -1 on failure.
+ *
+ * BUGS: This code is seriously over-engineered. There is also
+ * magic about how the driver specific features are setup. If
+ * a driver is attached we assume the driver settings are auto
+ * remove.
+ */
+
+static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove)
+{
+ ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL;
+
+ down(&ide_setting_sem);
+ while ((*p) && strcmp((*p)->name, name) < 0)
+ p = &((*p)->next);
+ if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL)
+ goto abort;
+ memset(setting, 0, sizeof(*setting));
+ if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL)
+ goto abort;
+ strcpy(setting->name, name);
+ setting->rw = rw;
+ setting->read_ioctl = read_ioctl;
+ setting->write_ioctl = write_ioctl;
+ setting->data_type = data_type;
+ setting->min = min;
+ setting->max = max;
+ setting->mul_factor = mul_factor;
+ setting->div_factor = div_factor;
+ setting->data = data;
+ setting->set = set;
+
+ setting->next = *p;
+ if (auto_remove)
+ setting->auto_remove = 1;
+ *p = setting;
+ up(&ide_setting_sem);
+ return 0;
+abort:
+ up(&ide_setting_sem);
+ if (setting)
+ kfree(setting);
+ return -1;
+}
+
+int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set)
+{
+ return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1);
+}
+
+EXPORT_SYMBOL(ide_add_setting);
+
+/**
+ * __ide_remove_setting - remove an ide setting option
+ * @drive: drive to use
+ * @name: setting name
+ *
+ * Removes the setting named from the device if it is present.
+ * The caller must hold the setting semaphore.
+ */
+
+static void __ide_remove_setting (ide_drive_t *drive, char *name)
+{
+ ide_settings_t **p, *setting;
+
+ p = (ide_settings_t **) &drive->settings;
+
+ while ((*p) && strcmp((*p)->name, name))
+ p = &((*p)->next);
+ if ((setting = (*p)) == NULL)
+ return;
+
+ (*p) = setting->next;
+
+ kfree(setting->name);
+ kfree(setting);
+}
+
+/**
+ * ide_find_setting_by_ioctl - find a drive specific ioctl
+ * @drive: drive to scan
+ * @cmd: ioctl command to handle
+ *
+ * Scan's the device setting table for a matching entry and returns
+ * this or NULL if no entry is found. The caller must hold the
+ * setting semaphore
+ */
+
+static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd)
+{
+ ide_settings_t *setting = drive->settings;
+
+ while (setting) {
+ if (setting->read_ioctl == cmd || setting->write_ioctl == cmd)
+ break;
+ setting = setting->next;
+ }
+
+ return setting;
+}
+
+/**
+ * ide_find_setting_by_name - find a drive specific setting
+ * @drive: drive to scan
+ * @name: setting name
+ *
+ * Scan's the device setting table for a matching entry and returns
+ * this or NULL if no entry is found. The caller must hold the
+ * setting semaphore
+ */
+
+ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name)
+{
+ ide_settings_t *setting = drive->settings;
+
+ while (setting) {
+ if (strcmp(setting->name, name) == 0)
+ break;
+ setting = setting->next;
+ }
+ return setting;
+}
+
+/**
+ * auto_remove_settings - remove driver specific settings
+ * @drive: drive
+ *
+ * Automatically remove all the driver specific settings for this
+ * drive. This function may sleep and must not be called from IRQ
+ * context. The caller must hold ide_setting_sem.
+ */
+
+static void auto_remove_settings (ide_drive_t *drive)
+{
+ ide_settings_t *setting;
+repeat:
+ setting = drive->settings;
+ while (setting) {
+ if (setting->auto_remove) {
+ __ide_remove_setting(drive, setting->name);
+ goto repeat;
+ }
+ setting = setting->next;
+ }
+}
+
+/**
+ * ide_read_setting - read an IDE setting
+ * @drive: drive to read from
+ * @setting: drive setting
+ *
+ * Read a drive setting and return the value. The caller
+ * must hold the ide_setting_sem when making this call.
+ *
+ * BUGS: the data return and error are the same return value
+ * so an error -EINVAL and true return of the same value cannot
+ * be told apart
+ */
+
+int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting)
+{
+ int val = -EINVAL;
+ unsigned long flags;
+
+ if ((setting->rw & SETTING_READ)) {
+ spin_lock_irqsave(&ide_lock, flags);
+ switch(setting->data_type) {
+ case TYPE_BYTE:
+ val = *((u8 *) setting->data);
+ break;
+ case TYPE_SHORT:
+ val = *((u16 *) setting->data);
+ break;
+ case TYPE_INT:
+ case TYPE_INTA:
+ val = *((u32 *) setting->data);
+ break;
+ }
+ spin_unlock_irqrestore(&ide_lock, flags);
+ }
+ return val;
+}
+
+/**
+ * ide_spin_wait_hwgroup - wait for group
+ * @drive: drive in the group
+ *
+ * Wait for an IDE device group to go non busy and then return
+ * holding the ide_lock which guards the hwgroup->busy status
+ * and right to use it.
+ */
+
+int ide_spin_wait_hwgroup (ide_drive_t *drive)
+{
+ ide_hwgroup_t *hwgroup = HWGROUP(drive);
+ unsigned long timeout = jiffies + (3 * HZ);
+
+ spin_lock_irq(&ide_lock);
+
+ while (hwgroup->busy) {
+ unsigned long lflags;
+ spin_unlock_irq(&ide_lock);
+ local_irq_set(lflags);
+ if (time_after(jiffies, timeout)) {
+ local_irq_restore(lflags);
+ printk(KERN_ERR "%s: channel busy\n", drive->name);
+ return -EBUSY;
+ }
+ local_irq_restore(lflags);
+ spin_lock_irq(&ide_lock);
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(ide_spin_wait_hwgroup);
+
+/**
+ * ide_write_setting - read an IDE setting
+ * @drive: drive to read from
+ * @setting: drive setting
+ * @val: value
+ *
+ * Write a drive setting if it is possible. The caller
+ * must hold the ide_setting_sem when making this call.
+ *
+ * BUGS: the data return and error are the same return value
+ * so an error -EINVAL and true return of the same value cannot
+ * be told apart
+ *
+ * FIXME: This should be changed to enqueue a special request
+ * to the driver to change settings, and then wait on a sema for completion.
+ * The current scheme of polling is kludgy, though safe enough.
+ */
+
+int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val)
+{
+ int i;
+ u32 *p;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!(setting->rw & SETTING_WRITE))
+ return -EPERM;
+ if (val < setting->min || val > setting->max)
+ return -EINVAL;
+ if (setting->set)
+ return setting->set(drive, val);
+ if (ide_spin_wait_hwgroup(drive))
+ return -EBUSY;
+ switch (setting->data_type) {
+ case TYPE_BYTE:
+ *((u8 *) setting->data) = val;
+ break;
+ case TYPE_SHORT:
+ *((u16 *) setting->data) = val;
+ break;
+ case TYPE_INT:
+ *((u32 *) setting->data) = val;
+ break;
+ case TYPE_INTA:
+ p = (u32 *) setting->data;
+ for (i = 0; i < 1 << PARTN_BITS; i++, p++)
+ *p = val;
+ break;
+ }
+ spin_unlock_irq(&ide_lock);
+ return 0;
+}
+
+static int set_io_32bit(ide_drive_t *drive, int arg)
+{
+ drive->io_32bit = arg;
+#ifdef CONFIG_BLK_DEV_DTC2278
+ if (HWIF(drive)->chipset == ide_dtc2278)
+ HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
+#endif /* CONFIG_BLK_DEV_DTC2278 */
+ return 0;
+}
+
+static int set_using_dma (ide_drive_t *drive, int arg)
+{
+#ifdef CONFIG_BLK_DEV_IDEDMA
+ if (!drive->id || !(drive->id->capability & 1))
+ return -EPERM;
+ if (HWIF(drive)->ide_dma_check == NULL)
+ return -EPERM;
+ if (arg) {
+ if (HWIF(drive)->ide_dma_check(drive)) return -EIO;
+ if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
+ } else {
+ if (__ide_dma_off(drive))
+ return -EIO;
+ }
+ return 0;
+#else
+ return -EPERM;
+#endif
+}
+
+static int set_pio_mode (ide_drive_t *drive, int arg)
+{
+ struct request rq;
+
+ if (!HWIF(drive)->tuneproc)
+ return -ENOSYS;
+ if (drive->special.b.set_tune)
+ return -EBUSY;
+ ide_init_drive_cmd(&rq);
+ drive->tune_req = (u8) arg;
+ drive->special.b.set_tune = 1;
+ (void) ide_do_drive_cmd(drive, &rq, ide_wait);
+ return 0;
+}
+
+static int set_xfer_rate (ide_drive_t *drive, int arg)
+{
+ int err = ide_wait_cmd(drive,
+ WIN_SETFEATURES, (u8) arg,
+ SETFEATURES_XFER, 0, NULL);
+
+ if (!err && arg) {
+ ide_set_xfer_rate(drive, (u8) arg);
+ ide_driveid_update(drive);
+ }
+ return err;
+}
+
+/**
+ * ide_add_generic_settings - generic ide settings
+ * @drive: drive being configured
+ *
+ * Add the generic parts of the system settings to the /proc files and
+ * ioctls for this IDE device. The caller must not be holding the
+ * ide_setting_sem.
+ */
+
+void ide_add_generic_settings (ide_drive_t *drive)
+{
+/*
+ * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
+ */
+ __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0);
+ __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0);
+ __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0);
+ __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0);
+ __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0);
+ __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0);
+ __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0);
+ __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0);
+ __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0);
+}
+
+/**
+ * system_bus_clock - clock guess
+ *
+ * External version of the bus clock guess used by very old IDE drivers
+ * for things like VLB timings. Should not be used.
+ */
+
+int system_bus_clock (void)
+{
+ return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
+}
+
+EXPORT_SYMBOL(system_bus_clock);
+
+/*
+ * Locking is badly broken here - since way back. That sucker is
+ * root-only, but that's not an excuse... The real question is what
+ * exclusion rules do we want here.
+ */
+int ide_replace_subdriver (ide_drive_t *drive, const char *driver)
+{
+ if (!drive->present || drive->usage || drive->dead)
+ goto abort;
+ if (DRIVER(drive)->cleanup(drive))
+ goto abort;
+ strlcpy(drive->driver_req, driver, sizeof(drive->driver_req));
+ if (ata_attach(drive)) {
+ spin_lock(&drives_lock);
+ list_del_init(&drive->list);
+ spin_unlock(&drives_lock);
+ drive->driver_req[0] = 0;
+ ata_attach(drive);
+ } else {
+ drive->driver_req[0] = 0;
+ }
+ if (drive->driver && !strcmp(drive->driver->name, driver))
+ return 0;
+abort:
+ return 1;
+}
+
+/**
+ * ata_attach - attach an ATA/ATAPI device
+ * @drive: drive to attach
+ *
+ * Takes a drive that is as yet not assigned to any midlayer IDE
+ * driver (or is assigned to the default driver) and figures out
+ * which driver would like to own it. If nobody claims the drive
+ * then it is automatically attached to the default driver used for
+ * unclaimed objects.
+ *
+ * A return of zero indicates attachment to a driver, of one
+ * attachment to the default driver.
+ *
+ * Takes drivers_lock.
+ */
+
+int ata_attach(ide_drive_t *drive)
+{
+ struct list_head *p;
+ spin_lock(&drivers_lock);
+ list_for_each(p, &drivers) {
+ ide_driver_t *driver = list_entry(p, ide_driver_t, drivers);
+ if (!try_module_get(driver->owner))
+ continue;
+ spin_unlock(&drivers_lock);
+ if (driver->attach(drive) == 0) {
+ module_put(driver->owner);
+ drive->gendev.driver = &driver->gen_driver;
+ return 0;
+ }
+ spin_lock(&drivers_lock);
+ module_put(driver->owner);
+ }
+ drive->gendev.driver = NULL;
+ spin_unlock(&drivers_lock);
+ if (ide_register_subdriver(drive, NULL))
+ panic("ide: default attach failed");
+ return 1;
+}
+
+static int generic_ide_suspend(struct device *dev, pm_message_t state)
+{
+ ide_drive_t *drive = dev->driver_data;
+ struct request rq;
+ struct request_pm_state rqpm;
+ ide_task_t args;
+
+ memset(&rq, 0, sizeof(rq));
+ memset(&rqpm, 0, sizeof(rqpm));
+ memset(&args, 0, sizeof(args));
+ rq.flags = REQ_PM_SUSPEND;
+ rq.special = &args;
+ rq.pm = &rqpm;
+ rqpm.pm_step = ide_pm_state_start_suspend;
+ rqpm.pm_state = state;
+
+ return ide_do_drive_cmd(drive, &rq, ide_wait);
+}
+
+static int generic_ide_resume(struct device *dev)
+{
+ ide_drive_t *drive = dev->driver_data;
+ struct request rq;
+ struct request_pm_state rqpm;
+ ide_task_t args;
+
+ memset(&rq, 0, sizeof(rq));
+ memset(&rqpm, 0, sizeof(rqpm));
+ memset(&args, 0, sizeof(args));
+ rq.flags = REQ_PM_RESUME;
+ rq.special = &args;
+ rq.pm = &rqpm;
+ rqpm.pm_step = ide_pm_state_start_resume;
+ rqpm.pm_state = 0;
+
+ return ide_do_drive_cmd(drive, &rq, ide_head_wait);
+}
+
+int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
+ unsigned int cmd, unsigned long arg)
+{
+ ide_settings_t *setting;
+ ide_driver_t *drv;
+ int err = 0;
+ void __user *p = (void __user *)arg;
+
+ down(&ide_setting_sem);
+ if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) {
+ if (cmd == setting->read_ioctl) {
+ err = ide_read_setting(drive, setting);
+ up(&ide_setting_sem);
+ return err >= 0 ? put_user(err, (long __user *)arg) : err;
+ } else {
+ if (bdev != bdev->bd_contains)
+ err = -EINVAL;
+ else
+ err = ide_write_setting(drive, setting, arg);
+ up(&ide_setting_sem);
+ return err;
+ }
+ }
+ up(&ide_setting_sem);
+
+ switch (cmd) {
+ case HDIO_GETGEO:
+ {
+ struct hd_geometry geom;
+ if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL;
+ geom.heads = drive->bios_head;
+ geom.sectors = drive->bios_sect;
+ geom.cylinders = (u16)drive->bios_cyl; /* truncate */
+ geom.start = get_start_sect(bdev);
+ if (copy_to_user(p, &geom, sizeof(struct hd_geometry)))
+ return -EFAULT;
+ return 0;
+ }
+
+ case HDIO_OBSOLETE_IDENTITY:
+ case HDIO_GET_IDENTITY:
+ if (bdev != bdev->bd_contains)
+ return -EINVAL;
+ if (drive->id_read == 0)
+ return -ENOMSG;
+ if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
+ return -EFAULT;
+ return 0;
+
+ case HDIO_GET_NICE:
+ return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
+ drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
+ drive->nice0 << IDE_NICE_0 |
+ drive->nice1 << IDE_NICE_1 |
+ drive->nice2 << IDE_NICE_2,
+ (long __user *) arg);
+
+#ifdef CONFIG_IDE_TASK_IOCTL
+ case HDIO_DRIVE_TASKFILE:
+ if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
+ return -EACCES;
+ switch(drive->media) {
+ case ide_disk:
+ return ide_taskfile_ioctl(drive, cmd, arg);
+ default:
+ return -ENOMSG;
+ }
+#endif /* CONFIG_IDE_TASK_IOCTL */
+
+ case HDIO_DRIVE_CMD:
+ if (!capable(CAP_SYS_RAWIO))
+ return -EACCES;
+ return ide_cmd_ioctl(drive, cmd, arg);
+
+ case HDIO_DRIVE_TASK:
+ if (!capable(CAP_SYS_RAWIO))
+ return -EACCES;
+ return ide_task_ioctl(drive, cmd, arg);
+
+ case HDIO_SCAN_HWIF:
+ {
+ hw_regs_t hw;
+ int args[3];
+ if (!capable(CAP_SYS_RAWIO)) return -EACCES;
+ if (copy_from_user(args, p, 3 * sizeof(int)))
+ return -EFAULT;
+ memset(&hw, 0, sizeof(hw));
+ ide_init_hwif_ports(&hw, (unsigned long) args[0],
+ (unsigned long) args[1], NULL);
+ hw.irq = args[2];
+ if (ide_register_hw(&hw, NULL) == -1)
+ return -EIO;
+ return 0;
+ }
+ case HDIO_UNREGISTER_HWIF:
+ if (!capable(CAP_SYS_RAWIO)) return -EACCES;
+ /* (arg > MAX_HWIFS) checked in function */
+ ide_unregister(arg);
+ return 0;
+ case HDIO_SET_NICE:
+ if (!capable(CAP_SYS_ADMIN)) return -EACCES;
+ if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
+ return -EPERM;
+ drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
+ drv = *(ide_driver_t **)bdev->bd_disk->private_data;
+ if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
+ drive->dsc_overlap = 0;
+ return -EPERM;
+ }
+ drive->nice1 = (arg >> IDE_NICE_1) & 1;
+ return 0;
+ case HDIO_DRIVE_RESET:
+ {
+ unsigned long flags;
+ if (!capable(CAP_SYS_ADMIN)) return -EACCES;
+
+ /*
+ * Abort the current command on the
+ * group if there is one, taking
+ * care not to allow anything else
+ * to be queued and to die on the
+ * spot if we miss one somehow
+ */
+
+ spin_lock_irqsave(&ide_lock, flags);
+
+ ide_abort(drive, "drive reset");
+
+ if(HWGROUP(drive)->handler)
+ BUG();
+
+ /* Ensure nothing gets queued after we
+ drop the lock. Reset will clear the busy */
+
+ HWGROUP(drive)->busy = 1;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ (void) ide_do_reset(drive);
+
+ return 0;
+ }
+
+ case CDROMEJECT:
+ case CDROMCLOSETRAY:
+ return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p);
+
+ case HDIO_GET_BUSSTATE:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
+ return -EFAULT;
+ return 0;
+
+ case HDIO_SET_BUSSTATE:
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (HWIF(drive)->busproc)
+ return HWIF(drive)->busproc(drive, (int)arg);
+ return -EOPNOTSUPP;
+ default:
+ return -EINVAL;
+ }
+}
+
+EXPORT_SYMBOL(generic_ide_ioctl);
+
+/*
+ * stridx() returns the offset of c within s,
+ * or -1 if c is '\0' or not found within s.
+ */
+static int __init stridx (const char *s, char c)
+{
+ char *i = strchr(s, c);
+ return (i && c) ? i - s : -1;
+}
+
+/*
+ * match_parm() does parsing for ide_setup():
+ *
+ * 1. the first char of s must be '='.
+ * 2. if the remainder matches one of the supplied keywords,
+ * the index (1 based) of the keyword is negated and returned.
+ * 3. if the remainder is a series of no more than max_vals numbers
+ * separated by commas, the numbers are saved in vals[] and a
+ * count of how many were saved is returned. Base10 is assumed,
+ * and base16 is allowed when prefixed with "0x".
+ * 4. otherwise, zero is returned.
+ */
+static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
+{
+ static const char *decimal = "0123456789";
+ static const char *hex = "0123456789abcdef";
+ int i, n;
+
+ if (*s++ == '=') {
+ /*
+ * Try matching against the supplied keywords,
+ * and return -(index+1) if we match one
+ */
+ if (keywords != NULL) {
+ for (i = 0; *keywords != NULL; ++i) {
+ if (!strcmp(s, *keywords++))
+ return -(i+1);
+ }
+ }
+ /*
+ * Look for a series of no more than "max_vals"
+ * numeric values separated by commas, in base10,
+ * or base16 when prefixed with "0x".
+ * Return a count of how many were found.
+ */
+ for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
+ vals[n] = i;
+ while ((i = stridx(decimal, *++s)) >= 0)
+ vals[n] = (vals[n] * 10) + i;
+ if (*s == 'x' && !vals[n]) {
+ while ((i = stridx(hex, *++s)) >= 0)
+ vals[n] = (vals[n] * 0x10) + i;
+ }
+ if (++n == max_vals)
+ break;
+ if (*s == ',' || *s == ';')
+ ++s;
+ }
+ if (!*s)
+ return n;
+ }
+ return 0; /* zero = nothing matched */
+}
+
+#ifdef CONFIG_BLK_DEV_ALI14XX
+static int __initdata probe_ali14xx;
+extern int ali14xx_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+static int __initdata probe_umc8672;
+extern int umc8672_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+static int __initdata probe_dtc2278;
+extern int dtc2278_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+static int __initdata probe_ht6560b;
+extern int ht6560b_init(void);
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+static int __initdata probe_qd65xx;
+extern int qd65xx_init(void);
+#endif
+
+static int __initdata is_chipset_set[MAX_HWIFS];
+
+/*
+ * ide_setup() gets called VERY EARLY during initialization,
+ * to handle kernel "command line" strings beginning with "hdx=" or "ide".
+ *
+ * Remember to update Documentation/ide.txt if you change something here.
+ */
+static int __init ide_setup(char *s)
+{
+ int i, vals[3];
+ ide_hwif_t *hwif;
+ ide_drive_t *drive;
+ unsigned int hw, unit;
+ const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
+ const char max_hwif = '0' + (MAX_HWIFS - 1);
+
+
+ if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
+ return 0; /* driver and not us */
+
+ if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
+ return 0;
+
+ printk(KERN_INFO "ide_setup: %s", s);
+ init_ide_data ();
+
+#ifdef CONFIG_BLK_DEV_IDEDOUBLER
+ if (!strcmp(s, "ide=doubler")) {
+ extern int ide_doubler;
+
+ printk(" : Enabled support for IDE doublers\n");
+ ide_doubler = 1;
+ return 1;
+ }
+#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
+
+ if (!strcmp(s, "ide=nodma")) {
+ printk(" : Prevented DMA\n");
+ noautodma = 1;
+ return 1;
+ }
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+ if (!strcmp(s, "ide=reverse")) {
+ ide_scan_direction = 1;
+ printk(" : Enabled support for IDE inverse scan order.\n");
+ return 1;
+ }
+#endif /* CONFIG_BLK_DEV_IDEPCI */
+
+ /*
+ * Look for drive options: "hdx="
+ */
+ if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
+ const char *hd_words[] = {
+ "none", "noprobe", "nowerr", "cdrom", "serialize",
+ "autotune", "noautotune", "minus8", "swapdata", "bswap",
+ "minus11", "remap", "remap63", "scsi", NULL };
+ unit = s[2] - 'a';
+ hw = unit / MAX_DRIVES;
+ unit = unit % MAX_DRIVES;
+ hwif = &ide_hwifs[hw];
+ drive = &hwif->drives[unit];
+ if (strncmp(s + 4, "ide-", 4) == 0) {
+ strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
+ goto done;
+ }
+ switch (match_parm(&s[3], hd_words, vals, 3)) {
+ case -1: /* "none" */
+ case -2: /* "noprobe" */
+ drive->noprobe = 1;
+ goto done;
+ case -3: /* "nowerr" */
+ drive->bad_wstat = BAD_R_STAT;
+ hwif->noprobe = 0;
+ goto done;
+ case -4: /* "cdrom" */
+ drive->present = 1;
+ drive->media = ide_cdrom;
+ /* an ATAPI device ignores DRDY */
+ drive->ready_stat = 0;
+ hwif->noprobe = 0;
+ goto done;
+ case -5: /* "serialize" */
+ printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
+ goto do_serialize;
+ case -6: /* "autotune" */
+ drive->autotune = IDE_TUNE_AUTO;
+ goto obsolete_option;
+ case -7: /* "noautotune" */
+ drive->autotune = IDE_TUNE_NOAUTO;
+ goto obsolete_option;
+ case -9: /* "swapdata" */
+ case -10: /* "bswap" */
+ drive->bswap = 1;
+ goto done;
+ case -12: /* "remap" */
+ drive->remap_0_to_1 = 1;
+ goto done;
+ case -13: /* "remap63" */
+ drive->sect0 = 63;
+ goto done;
+ case -14: /* "scsi" */
+ drive->scsi = 1;
+ goto done;
+ case 3: /* cyl,head,sect */
+ drive->media = ide_disk;
+ drive->ready_stat = READY_STAT;
+ drive->cyl = drive->bios_cyl = vals[0];
+ drive->head = drive->bios_head = vals[1];
+ drive->sect = drive->bios_sect = vals[2];
+ drive->present = 1;
+ drive->forced_geom = 1;
+ hwif->noprobe = 0;
+ goto done;
+ default:
+ goto bad_option;
+ }
+ }
+
+ if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
+ goto bad_option;
+ /*
+ * Look for bus speed option: "idebus="
+ */
+ if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
+ if (match_parm(&s[6], NULL, vals, 1) != 1)
+ goto bad_option;
+ if (vals[0] >= 20 && vals[0] <= 66) {
+ idebus_parameter = vals[0];
+ } else
+ printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
+ goto done;
+ }
+ /*
+ * Look for interface options: "idex="
+ */
+ if (s[3] >= '0' && s[3] <= max_hwif) {
+ /*
+ * Be VERY CAREFUL changing this: note hardcoded indexes below
+ * (-8, -9, -10) are reserved to ease the hardcoding.
+ */
+ static const char *ide_words[] = {
+ "noprobe", "serialize", "autotune", "noautotune",
+ "reset", "dma", "ata66", "minus8", "minus9",
+ "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
+ "dtc2278", "umc8672", "ali14xx", NULL };
+ hw = s[3] - '0';
+ hwif = &ide_hwifs[hw];
+ i = match_parm(&s[4], ide_words, vals, 3);
+
+ /*
+ * Cryptic check to ensure chipset not already set for hwif.
+ * Note: we can't depend on hwif->chipset here.
+ */
+ if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
+ /* chipset already specified */
+ if (is_chipset_set[hw])
+ goto bad_option;
+ if (i > -18 && i <= -11) {
+ /* these drivers are for "ide0=" only */
+ if (hw != 0)
+ goto bad_hwif;
+ /* chipset already specified for 2nd port */
+ if (is_chipset_set[hw+1])
+ goto bad_option;
+ }
+ is_chipset_set[hw] = 1;
+ printk("\n");
+ }
+
+ switch (i) {
+#ifdef CONFIG_BLK_DEV_ALI14XX
+ case -17: /* "ali14xx" */
+ probe_ali14xx = 1;
+ goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+ case -16: /* "umc8672" */
+ probe_umc8672 = 1;
+ goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+ case -15: /* "dtc2278" */
+ probe_dtc2278 = 1;
+ goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_CMD640
+ case -14: /* "cmd640_vlb" */
+ {
+ extern int cmd640_vlb; /* flag for cmd640.c */
+ cmd640_vlb = 1;
+ goto done;
+ }
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+ case -13: /* "ht6560b" */
+ probe_ht6560b = 1;
+ goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+ case -12: /* "qd65xx" */
+ probe_qd65xx = 1;
+ goto done;
+#endif
+#ifdef CONFIG_BLK_DEV_4DRIVES
+ case -11: /* "four" drives on one set of ports */
+ {
+ ide_hwif_t *mate = &ide_hwifs[hw^1];
+ mate->drives[0].select.all ^= 0x20;
+ mate->drives[1].select.all ^= 0x20;
+ hwif->chipset = mate->chipset = ide_4drives;
+ mate->irq = hwif->irq;
+ memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
+ goto do_serialize;
+ }
+#endif /* CONFIG_BLK_DEV_4DRIVES */
+ case -10: /* minus10 */
+ case -9: /* minus9 */
+ case -8: /* minus8 */
+ goto bad_option;
+ case -7: /* ata66 */
+#ifdef CONFIG_BLK_DEV_IDEPCI
+ hwif->udma_four = 1;
+ goto obsolete_option;
+#else
+ goto bad_hwif;
+#endif
+ case -6: /* dma */
+ hwif->autodma = 1;
+ goto obsolete_option;
+ case -5: /* "reset" */
+ hwif->reset = 1;
+ goto obsolete_option;
+ case -4: /* "noautotune" */
+ hwif->drives[0].autotune = IDE_TUNE_NOAUTO;
+ hwif->drives[1].autotune = IDE_TUNE_NOAUTO;
+ goto obsolete_option;
+ case -3: /* "autotune" */
+ hwif->drives[0].autotune = IDE_TUNE_AUTO;
+ hwif->drives[1].autotune = IDE_TUNE_AUTO;
+ goto obsolete_option;
+ case -2: /* "serialize" */
+ do_serialize:
+ hwif->mate = &ide_hwifs[hw^1];
+ hwif->mate->mate = hwif;
+ hwif->serialized = hwif->mate->serialized = 1;
+ goto obsolete_option;
+
+ case -1: /* "noprobe" */
+ hwif->noprobe = 1;
+ goto done;
+
+ case 1: /* base */
+ vals[1] = vals[0] + 0x206; /* default ctl */
+ case 2: /* base,ctl */
+ vals[2] = 0; /* default irq = probe for it */
+ case 3: /* base,ctl,irq */
+ hwif->hw.irq = vals[2];
+ ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq);
+ memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
+ hwif->irq = vals[2];
+ hwif->noprobe = 0;
+ hwif->chipset = ide_forced;
+ goto obsolete_option;
+
+ case 0: goto bad_option;
+ default:
+ printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
+ return 1;
+ }
+ }
+bad_option:
+ printk(" -- BAD OPTION\n");
+ return 1;
+obsolete_option:
+ printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
+ return 1;
+bad_hwif:
+ printk("-- NOT SUPPORTED ON ide%d", hw);
+done:
+ printk("\n");
+ return 1;
+}
+
+extern void pnpide_init(void);
+extern void h8300_ide_init(void);
+
+/*
+ * probe_for_hwifs() finds/initializes "known" IDE interfaces
+ */
+static void __init probe_for_hwifs (void)
+{
+#ifdef CONFIG_BLK_DEV_IDEPCI
+ ide_scan_pcibus(ide_scan_direction);
+#endif /* CONFIG_BLK_DEV_IDEPCI */
+
+#ifdef CONFIG_ETRAX_IDE
+ {
+ extern void init_e100_ide(void);
+ init_e100_ide();
+ }
+#endif /* CONFIG_ETRAX_IDE */
+#ifdef CONFIG_BLK_DEV_CMD640
+ {
+ extern void ide_probe_for_cmd640x(void);
+ ide_probe_for_cmd640x();
+ }
+#endif /* CONFIG_BLK_DEV_CMD640 */
+#ifdef CONFIG_BLK_DEV_IDE_PMAC
+ {
+ extern void pmac_ide_probe(void);
+ pmac_ide_probe();
+ }
+#endif /* CONFIG_BLK_DEV_IDE_PMAC */
+#ifdef CONFIG_BLK_DEV_GAYLE
+ {
+ extern void gayle_init(void);
+ gayle_init();
+ }
+#endif /* CONFIG_BLK_DEV_GAYLE */
+#ifdef CONFIG_BLK_DEV_FALCON_IDE
+ {
+ extern void falconide_init(void);
+ falconide_init();
+ }
+#endif /* CONFIG_BLK_DEV_FALCON_IDE */
+#ifdef CONFIG_BLK_DEV_MAC_IDE
+ {
+ extern void macide_init(void);
+ macide_init();
+ }
+#endif /* CONFIG_BLK_DEV_MAC_IDE */
+#ifdef CONFIG_BLK_DEV_Q40IDE
+ {
+ extern void q40ide_init(void);
+ q40ide_init();
+ }
+#endif /* CONFIG_BLK_DEV_Q40IDE */
+#ifdef CONFIG_BLK_DEV_BUDDHA
+ {
+ extern void buddha_init(void);
+ buddha_init();
+ }
+#endif /* CONFIG_BLK_DEV_BUDDHA */
+#ifdef CONFIG_BLK_DEV_IDEPNP
+ pnpide_init();
+#endif
+#ifdef CONFIG_H8300
+ h8300_ide_init();
+#endif
+}
+
+int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ide_lock, flags);
+ if (!drive->present || drive->driver != NULL ||
+ drive->usage || drive->dead) {
+ spin_unlock_irqrestore(&ide_lock, flags);
+ return 1;
+ }
+ drive->driver = driver;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ spin_lock(&drives_lock);
+ list_add_tail(&drive->list, driver ? &driver->drives : &ide_drives);
+ spin_unlock(&drives_lock);
+// printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name);
+#ifdef CONFIG_PROC_FS
+ if (driver)
+ ide_add_proc_entries(drive->proc, driver->proc, drive);
+#endif
+ return 0;
+}
+
+EXPORT_SYMBOL(ide_register_subdriver);
+
+/**
+ * ide_unregister_subdriver - disconnect drive from driver
+ * @drive: drive to unplug
+ *
+ * Disconnect a drive from the driver it was attached to and then
+ * clean up the various proc files and other objects attached to it.
+ *
+ * Takes ide_setting_sem, ide_lock and drives_lock.
+ * Caller must hold none of the locks.
+ *
+ * No locking versus subdriver unload because we are moving to the
+ * default driver anyway. Wants double checking.
+ */
+
+int ide_unregister_subdriver (ide_drive_t *drive)
+{
+ unsigned long flags;
+
+ down(&ide_setting_sem);
+ spin_lock_irqsave(&ide_lock, flags);
+ if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) {
+ spin_unlock_irqrestore(&ide_lock, flags);
+ up(&ide_setting_sem);
+ return 1;
+ }
+#ifdef CONFIG_PROC_FS
+ ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc);
+#endif
+ auto_remove_settings(drive);
+ drive->driver = NULL;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ up(&ide_setting_sem);
+ spin_lock(&drives_lock);
+ list_del_init(&drive->list);
+ spin_unlock(&drives_lock);
+ /* drive will be added to &ide_drives in ata_attach() */
+ return 0;
+}
+
+EXPORT_SYMBOL(ide_unregister_subdriver);
+
+static int ide_drive_remove(struct device * dev)
+{
+ ide_drive_t * drive = container_of(dev,ide_drive_t,gendev);
+ DRIVER(drive)->cleanup(drive);
+ return 0;
+}
+
+/**
+ * ide_register_driver - register IDE device driver
+ * @driver: the IDE device driver
+ *
+ * Register a new device driver and then scan the devices
+ * on the IDE bus in case any should be attached to the
+ * driver we have just registered. If so attach them.
+ *
+ * Takes drivers_lock and drives_lock.
+ */
+
+int ide_register_driver(ide_driver_t *driver)
+{
+ struct list_head list;
+ struct list_head *list_loop;
+ struct list_head *tmp_storage;
+
+ spin_lock(&drivers_lock);
+ list_add(&driver->drivers, &drivers);
+ spin_unlock(&drivers_lock);
+
+ INIT_LIST_HEAD(&list);
+ spin_lock(&drives_lock);
+ list_splice_init(&ide_drives, &list);
+ spin_unlock(&drives_lock);
+
+ list_for_each_safe(list_loop, tmp_storage, &list) {
+ ide_drive_t *drive = container_of(list_loop, ide_drive_t, list);
+ list_del_init(&drive->list);
+ if (drive->present)
+ ata_attach(drive);
+ }
+ driver->gen_driver.name = (char *) driver->name;
+ driver->gen_driver.bus = &ide_bus_type;
+ driver->gen_driver.remove = ide_drive_remove;
+ return driver_register(&driver->gen_driver);
+}
+
+EXPORT_SYMBOL(ide_register_driver);
+
+/**
+ * ide_unregister_driver - unregister IDE device driver
+ * @driver: the IDE device driver
+ *
+ * Called when a driver module is being unloaded. We reattach any
+ * devices to whatever driver claims them next (typically the default
+ * driver).
+ *
+ * Takes drivers_lock and called functions will take ide_setting_sem.
+ */
+
+void ide_unregister_driver(ide_driver_t *driver)
+{
+ ide_drive_t *drive;
+
+ spin_lock(&drivers_lock);
+ list_del(&driver->drivers);
+ spin_unlock(&drivers_lock);
+
+ driver_unregister(&driver->gen_driver);
+
+ while(!list_empty(&driver->drives)) {
+ drive = list_entry(driver->drives.next, ide_drive_t, list);
+ if (driver->cleanup(drive)) {
+ printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
+ BUG();
+ }
+ ata_attach(drive);
+ }
+}
+
+EXPORT_SYMBOL(ide_unregister_driver);
+
+/*
+ * Probe module
+ */
+
+EXPORT_SYMBOL(ide_lock);
+
+struct bus_type ide_bus_type = {
+ .name = "ide",
+ .suspend = generic_ide_suspend,
+ .resume = generic_ide_resume,
+};
+
+/*
+ * This is gets invoked once during initialization, to set *everything* up
+ */
+static int __init ide_init(void)
+{
+ printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
+ devfs_mk_dir("ide");
+ system_bus_speed = ide_system_bus_speed();
+
+ bus_register(&ide_bus_type);
+
+ init_ide_data();
+
+#ifdef CONFIG_PROC_FS
+ proc_ide_root = proc_mkdir("ide", NULL);
+#endif
+
+#ifdef CONFIG_BLK_DEV_ALI14XX
+ if (probe_ali14xx)
+ (void)ali14xx_init();
+#endif
+#ifdef CONFIG_BLK_DEV_UMC8672
+ if (probe_umc8672)
+ (void)umc8672_init();
+#endif
+#ifdef CONFIG_BLK_DEV_DTC2278
+ if (probe_dtc2278)
+ (void)dtc2278_init();
+#endif
+#ifdef CONFIG_BLK_DEV_HT6560B
+ if (probe_ht6560b)
+ (void)ht6560b_init();
+#endif
+#ifdef CONFIG_BLK_DEV_QD65XX
+ if (probe_qd65xx)
+ (void)qd65xx_init();
+#endif
+
+ initializing = 1;
+ /* Probe for special PCI and other "known" interface chipsets. */
+ probe_for_hwifs();
+ initializing = 0;
+
+#ifdef CONFIG_PROC_FS
+ proc_ide_create();
+#endif
+ return 0;
+}
+
+#ifdef MODULE
+static char *options = NULL;
+module_param(options, charp, 0);
+MODULE_LICENSE("GPL");
+
+static void __init parse_options (char *line)
+{
+ char *next = line;
+
+ if (line == NULL || !*line)
+ return;
+ while ((line = next) != NULL) {
+ if ((next = strchr(line,' ')) != NULL)
+ *next++ = 0;
+ if (!ide_setup(line))
+ printk (KERN_INFO "Unknown option '%s'\n", line);
+ }
+}
+
+int init_module (void)
+{
+ parse_options(options);
+ return ide_init();
+}
+
+void cleanup_module (void)
+{
+ int index;
+
+ for (index = 0; index < MAX_HWIFS; ++index)
+ ide_unregister(index);
+
+#ifdef CONFIG_PROC_FS
+ proc_ide_destroy();
+#endif
+ devfs_remove("ide");
+
+ bus_unregister(&ide_bus_type);
+}
+
+#else /* !MODULE */
+
+__setup("", ide_setup);
+
+module_init(ide_init);
+
+#endif /* MODULE */
