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linux/drivers/ide/ide.c
Richard Purdie 9810933701 [PATCH] stop CompactFlash devices being marked as removable 
This patch stops CompactFlash devices being marked as removable.  They are
not removable (as defined by Linux) as the media and device are
inseparable.  When a card is removed, the whole device is removed from the
system and never sits in a media-less state.

This stops some nasty udev device creation/destruction loops.

Further, once this change is made, there is no need for ide to can be
removed from ide_drive_t.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-03 08:32:12 -08:00

2089 lines
55 KiB
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Raw Blame History

/*
* 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);
/*
* 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 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;
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) {
if (drive->devfs_name[0] != '\0') {
devfs_remove(drive->devfs_name);
drive->devfs_name[0] = '\0';
}
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;
}
/* 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;
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 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.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.flags = REQ_PM_RESUME;
rq.special = &args;
rq.pm = &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);
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
}
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)
{
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 */
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