2 * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
12 * See linux/MAINTAINERS for address of current maintainer.
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
17 * There can be up to two drives per interface, as per the ATA-2 spec.
23 * | It traverses the request-list, using interrupts to jump between functions.
24 * | As nearly all functions can be called within interrupts, we may not sleep.
25 * | Special care is recommended. Have Fun!
27 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
29 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
30 * | in the early extended-partition checks and added DM partitions.
32 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
34 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
35 * | and general streamlining by Mark Lord (mlord@pobox.com).
37 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
39 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
40 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
41 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
43 * This was a rewrite of just about everything from hd.c, though some original
44 * code is still sprinkled about. Think of it as a major evolution, with
45 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
48 #define REVISION "Revision: 7.00alpha2"
49 #define VERSION "Id: ide.c 7.00a2 20020906"
51 #define _IDE_C /* Tell ide.h it's really us */
53 #include <linux/module.h>
54 #include <linux/types.h>
55 #include <linux/string.h>
56 #include <linux/kernel.h>
57 #include <linux/timer.h>
59 #include <linux/interrupt.h>
60 #include <linux/major.h>
61 #include <linux/errno.h>
62 #include <linux/genhd.h>
63 #include <linux/blkpg.h>
64 #include <linux/slab.h>
65 #include <linux/init.h>
66 #include <linux/pci.h>
67 #include <linux/delay.h>
68 #include <linux/ide.h>
69 #include <linux/completion.h>
70 #include <linux/reboot.h>
71 #include <linux/cdrom.h>
72 #include <linux/seq_file.h>
73 #include <linux/device.h>
74 #include <linux/bitops.h>
76 #include <asm/byteorder.h>
78 #include <asm/uaccess.h>
82 /* default maximum number of failures */
83 #define IDE_DEFAULT_MAX_FAILURES 1
85 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
86 IDE2_MAJOR, IDE3_MAJOR,
87 IDE4_MAJOR, IDE5_MAJOR,
88 IDE6_MAJOR, IDE7_MAJOR,
89 IDE8_MAJOR, IDE9_MAJOR };
91 static int idebus_parameter; /* holds the "idebus=" parameter */
92 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
94 DEFINE_MUTEX(ide_cfg_mtx);
95 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
97 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
98 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
103 #ifdef CONFIG_BLK_DEV_IDEACPI
105 int ide_noacpitfs = 1;
106 int ide_noacpionboot = 1;
110 * This is declared extern in ide.h, for access by other IDE modules:
112 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
114 EXPORT_SYMBOL(ide_hwifs);
117 * Do not even *think* about calling this!
119 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
123 /* bulk initialize hwif & drive info with zeros */
124 memset(hwif, 0, sizeof(ide_hwif_t));
126 /* fill in any non-zero initial values */
128 hwif->major = ide_hwif_to_major[index];
133 hwif->name[3] = '0' + index;
135 hwif->bus_state = BUSSTATE_ON;
137 init_completion(&hwif->gendev_rel_comp);
139 default_hwif_iops(hwif);
140 default_hwif_transport(hwif);
141 for (unit = 0; unit < MAX_DRIVES; ++unit) {
142 ide_drive_t *drive = &hwif->drives[unit];
144 drive->media = ide_disk;
145 drive->select.all = (unit<<4)|0xa0;
148 drive->ready_stat = READY_STAT;
149 drive->bad_wstat = BAD_W_STAT;
150 drive->special.b.recalibrate = 1;
151 drive->special.b.set_geometry = 1;
152 drive->name[0] = 'h';
153 drive->name[1] = 'd';
154 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
155 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
156 drive->using_dma = 0;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
162 EXPORT_SYMBOL_GPL(ide_init_port_data);
164 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
168 memset(&hw, 0, sizeof(hw_regs_t));
170 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
172 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
174 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
175 #ifdef CONFIG_BLK_DEV_HD
176 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
177 hwif->noprobe = 1; /* may be overridden by ide_setup() */
182 * init_ide_data() sets reasonable default values into all fields
183 * of all instances of the hwifs and drives, but only on the first call.
184 * Subsequent calls have no effect (they don't wipe out anything).
186 * This routine is normally called at driver initialization time,
187 * but may also be called MUCH earlier during kernel "command-line"
188 * parameter processing. As such, we cannot depend on any other parts
189 * of the kernel (such as memory allocation) to be functioning yet.
191 * This is too bad, as otherwise we could dynamically allocate the
192 * ide_drive_t structs as needed, rather than always consuming memory
193 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
195 * FIXME: We should stuff the setup data into __init and copy the
196 * relevant hwifs/allocate them properly during boot.
198 #define MAGIC_COOKIE 0x12345678
199 static void __init init_ide_data (void)
203 static unsigned long magic_cookie = MAGIC_COOKIE;
205 if (magic_cookie != MAGIC_COOKIE)
206 return; /* already initialized */
209 /* Initialise all interface structures */
210 for (index = 0; index < MAX_HWIFS; ++index) {
211 hwif = &ide_hwifs[index];
212 ide_init_port_data(hwif, index);
213 init_hwif_default(hwif, index);
214 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
216 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
222 * ide_system_bus_speed - guess bus speed
224 * ide_system_bus_speed() returns what we think is the system VESA/PCI
225 * bus speed (in MHz). This is used for calculating interface PIO timings.
226 * The default is 40 for known PCI systems, 50 otherwise.
227 * The "idebus=xx" parameter can be used to override this value.
228 * The actual value to be used is computed/displayed the first time
229 * through. Drivers should only use this as a last resort.
231 * Returns a guessed speed in MHz.
234 static int ide_system_bus_speed(void)
237 static struct pci_device_id pci_default[] = {
238 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
242 #define pci_default 0
243 #endif /* CONFIG_PCI */
245 if (!system_bus_speed) {
246 if (idebus_parameter) {
247 /* user supplied value */
248 system_bus_speed = idebus_parameter;
249 } else if (pci_dev_present(pci_default)) {
250 /* safe default value for PCI */
251 system_bus_speed = 33;
253 /* safe default value for VESA and PCI */
254 system_bus_speed = 50;
256 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
257 "for PIO modes%s\n", system_bus_speed,
258 idebus_parameter ? "" : "; override with idebus=xx");
260 return system_bus_speed;
263 ide_hwif_t * ide_find_port(unsigned long base)
268 for (i = 0; i < MAX_HWIFS; i++) {
269 hwif = &ide_hwifs[i];
270 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
274 for (i = 0; i < MAX_HWIFS; i++) {
275 hwif = &ide_hwifs[i];
276 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
285 EXPORT_SYMBOL_GPL(ide_find_port);
287 static struct resource* hwif_request_region(ide_hwif_t *hwif,
288 unsigned long addr, int num)
290 struct resource *res = request_region(addr, num, hwif->name);
293 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
294 hwif->name, addr, addr+num-1);
299 * ide_hwif_request_regions - request resources for IDE
300 * @hwif: interface to use
302 * Requests all the needed resources for an interface.
303 * Right now core IDE code does this work which is deeply wrong.
304 * MMIO leaves it to the controller driver,
305 * PIO will migrate this way over time.
308 int ide_hwif_request_regions(ide_hwif_t *hwif)
315 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
316 if (addr && !hwif_request_region(hwif, addr, 1))
317 goto control_region_busy;
319 addr = hwif->io_ports[IDE_DATA_OFFSET];
320 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
321 if (!hwif_request_region(hwif, addr, 8))
322 goto data_region_busy;
326 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
327 addr = hwif->io_ports[i];
328 if (!hwif_request_region(hwif, addr, 1)) {
330 release_region(addr, 1);
331 goto data_region_busy;
337 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
339 release_region(addr, 1);
341 /* If any errors are return, we drop the hwif interface. */
346 * ide_hwif_release_regions - free IDE resources
348 * Note that we only release the standard ports,
349 * and do not even try to handle any extra ports
350 * allocated for weird IDE interface chipsets.
352 * Note also that we don't yet handle mmio resources here. More
353 * importantly our caller should be doing this so we need to
354 * restructure this as a helper function for drivers.
357 void ide_hwif_release_regions(ide_hwif_t *hwif)
363 if (hwif->io_ports[IDE_CONTROL_OFFSET])
364 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
365 if (hwif->straight8) {
366 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
369 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
370 if (hwif->io_ports[i])
371 release_region(hwif->io_ports[i], 1);
375 * ide_hwif_restore - restore hwif to template
376 * @hwif: hwif to update
377 * @tmp_hwif: template
379 * Restore hwif to a previous state by copying most settings
383 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
385 hwif->hwgroup = tmp_hwif->hwgroup;
387 hwif->gendev.parent = tmp_hwif->gendev.parent;
389 hwif->proc = tmp_hwif->proc;
391 hwif->major = tmp_hwif->major;
392 hwif->straight8 = tmp_hwif->straight8;
393 hwif->bus_state = tmp_hwif->bus_state;
395 hwif->host_flags = tmp_hwif->host_flags;
397 hwif->pio_mask = tmp_hwif->pio_mask;
399 hwif->ultra_mask = tmp_hwif->ultra_mask;
400 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
401 hwif->swdma_mask = tmp_hwif->swdma_mask;
403 hwif->cbl = tmp_hwif->cbl;
405 hwif->chipset = tmp_hwif->chipset;
406 hwif->hold = tmp_hwif->hold;
408 #ifdef CONFIG_BLK_DEV_IDEPCI
409 hwif->pci_dev = tmp_hwif->pci_dev;
410 hwif->cds = tmp_hwif->cds;
413 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
414 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
415 hwif->mdma_filter = tmp_hwif->mdma_filter;
416 hwif->udma_filter = tmp_hwif->udma_filter;
417 hwif->selectproc = tmp_hwif->selectproc;
418 hwif->reset_poll = tmp_hwif->reset_poll;
419 hwif->pre_reset = tmp_hwif->pre_reset;
420 hwif->resetproc = tmp_hwif->resetproc;
421 hwif->maskproc = tmp_hwif->maskproc;
422 hwif->quirkproc = tmp_hwif->quirkproc;
423 hwif->busproc = tmp_hwif->busproc;
425 hwif->ata_input_data = tmp_hwif->ata_input_data;
426 hwif->ata_output_data = tmp_hwif->ata_output_data;
427 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
428 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
430 hwif->dma_host_set = tmp_hwif->dma_host_set;
431 hwif->dma_setup = tmp_hwif->dma_setup;
432 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
433 hwif->dma_start = tmp_hwif->dma_start;
434 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
435 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
436 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
437 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
438 hwif->dma_timeout = tmp_hwif->dma_timeout;
440 hwif->OUTB = tmp_hwif->OUTB;
441 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
442 hwif->OUTW = tmp_hwif->OUTW;
443 hwif->OUTSW = tmp_hwif->OUTSW;
444 hwif->OUTSL = tmp_hwif->OUTSL;
446 hwif->INB = tmp_hwif->INB;
447 hwif->INW = tmp_hwif->INW;
448 hwif->INSW = tmp_hwif->INSW;
449 hwif->INSL = tmp_hwif->INSL;
451 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
453 hwif->mmio = tmp_hwif->mmio;
454 hwif->rqsize = tmp_hwif->rqsize;
456 #ifndef CONFIG_BLK_DEV_IDECS
457 hwif->irq = tmp_hwif->irq;
460 hwif->dma_base = tmp_hwif->dma_base;
461 hwif->dma_command = tmp_hwif->dma_command;
462 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
463 hwif->dma_status = tmp_hwif->dma_status;
464 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
465 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
467 hwif->config_data = tmp_hwif->config_data;
468 hwif->select_data = tmp_hwif->select_data;
469 hwif->extra_base = tmp_hwif->extra_base;
470 hwif->extra_ports = tmp_hwif->extra_ports;
472 hwif->hwif_data = tmp_hwif->hwif_data;
476 * ide_unregister - free an IDE interface
477 * @index: index of interface (will change soon to a pointer)
479 * Perform the final unregister of an IDE interface. At the moment
480 * we don't refcount interfaces so this will also get split up.
483 * The caller must not hold the IDE locks
484 * The drive present/vanishing is not yet properly locked
485 * Take care with the callbacks. These have been split to avoid
486 * deadlocking the IDE layer. The shutdown callback is called
487 * before we take the lock and free resources. It is up to the
488 * caller to be sure there is no pending I/O here, and that
489 * the interface will not be reopened (present/vanishing locking
490 * isn't yet done BTW). After we commit to the final kill we
491 * call the cleanup callback with the ide locks held.
493 * Unregister restores the hwif structures to the default state.
494 * This is raving bonkers.
497 void ide_unregister(unsigned int index)
500 ide_hwif_t *hwif, *g;
501 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
502 ide_hwgroup_t *hwgroup;
503 int irq_count = 0, unit;
505 BUG_ON(index >= MAX_HWIFS);
507 BUG_ON(in_interrupt());
508 BUG_ON(irqs_disabled());
509 mutex_lock(&ide_cfg_mtx);
510 spin_lock_irq(&ide_lock);
511 hwif = &ide_hwifs[index];
514 for (unit = 0; unit < MAX_DRIVES; ++unit) {
515 drive = &hwif->drives[unit];
518 spin_unlock_irq(&ide_lock);
519 device_unregister(&drive->gendev);
520 wait_for_completion(&drive->gendev_rel_comp);
521 spin_lock_irq(&ide_lock);
525 spin_unlock_irq(&ide_lock);
527 ide_proc_unregister_port(hwif);
529 hwgroup = hwif->hwgroup;
531 * free the irq if we were the only hwif using it
535 if (g->irq == hwif->irq)
538 } while (g != hwgroup->hwif);
540 free_irq(hwif->irq, hwgroup);
542 spin_lock_irq(&ide_lock);
544 * Note that we only release the standard ports,
545 * and do not even try to handle any extra ports
546 * allocated for weird IDE interface chipsets.
548 ide_hwif_release_regions(hwif);
551 * Remove us from the hwgroup, and free
552 * the hwgroup if we were the only member
554 if (hwif->next == hwif) {
555 BUG_ON(hwgroup->hwif != hwif);
558 /* There is another interface in hwgroup.
559 * Unlink us, and set hwgroup->drive and ->hwif to
563 while (g->next != hwif)
565 g->next = hwif->next;
566 if (hwgroup->hwif == hwif) {
567 /* Chose a random hwif for hwgroup->hwif.
568 * It's guaranteed that there are no drives
569 * left in the hwgroup.
571 BUG_ON(hwgroup->drive != NULL);
574 BUG_ON(hwgroup->hwif == hwif);
577 /* More messed up locking ... */
578 spin_unlock_irq(&ide_lock);
579 device_unregister(&hwif->gendev);
580 wait_for_completion(&hwif->gendev_rel_comp);
583 * Remove us from the kernel's knowledge
585 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
586 kfree(hwif->sg_table);
587 unregister_blkdev(hwif->major, hwif->name);
588 spin_lock_irq(&ide_lock);
590 if (hwif->dma_base) {
591 (void) ide_release_dma(hwif);
594 hwif->dma_command = 0;
595 hwif->dma_vendor1 = 0;
596 hwif->dma_status = 0;
597 hwif->dma_vendor3 = 0;
598 hwif->dma_prdtable = 0;
600 hwif->extra_base = 0;
601 hwif->extra_ports = 0;
604 /* copy original settings */
607 /* restore hwif data to pristine status */
608 ide_init_port_data(hwif, index);
609 init_hwif_default(hwif, index);
611 ide_hwif_restore(hwif, &tmp_hwif);
614 spin_unlock_irq(&ide_lock);
615 mutex_unlock(&ide_cfg_mtx);
618 EXPORT_SYMBOL(ide_unregister);
622 * ide_setup_ports - set up IDE interface ports
623 * @hw: register descriptions
624 * @base: base register
625 * @offsets: table of register offsets
626 * @ctrl: control register
628 * @irq: interrupt lie
630 * Setup hw_regs_t structure described by parameters. You
631 * may set up the hw structure yourself OR use this routine to
632 * do it for you. This is basically a helper
636 void ide_setup_ports ( hw_regs_t *hw,
637 unsigned long base, int *offsets,
638 unsigned long ctrl, unsigned long intr,
639 ide_ack_intr_t *ack_intr,
641 * ide_io_ops_t *iops,
647 memset(hw, 0, sizeof(hw_regs_t));
648 for (i = 0; i < IDE_NR_PORTS; i++) {
649 if (offsets[i] == -1) {
651 case IDE_CONTROL_OFFSET:
652 hw->io_ports[i] = ctrl;
654 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
656 hw->io_ports[i] = intr;
658 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
664 hw->io_ports[i] = base + offsets[i];
668 hw->ack_intr = ack_intr;
674 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
676 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
679 hwif->chipset = hw->chipset;
680 hwif->gendev.parent = hw->dev;
681 hwif->ack_intr = hw->ack_intr;
683 EXPORT_SYMBOL_GPL(ide_init_port_hw);
686 * ide_register_hw - register IDE interface
687 * @hw: hardware registers
688 * @quirkproc: quirkproc function
689 * @hwifp: pointer to returned hwif
691 * Register an IDE interface, specifying exactly the registers etc.
693 * Returns -1 on error.
696 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
699 int index, retry = 1;
701 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
704 for (index = 0; index < MAX_HWIFS; ++index) {
705 hwif = &ide_hwifs[index];
706 if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
709 for (index = 0; index < MAX_HWIFS; ++index) {
710 hwif = &ide_hwifs[index];
713 if (!hwif->present && hwif->mate == NULL)
716 for (index = 0; index < MAX_HWIFS; index++)
717 ide_unregister(index);
722 ide_unregister(index);
723 else if (!hwif->hold) {
724 ide_init_port_data(hwif, index);
725 init_hwif_default(hwif, index);
730 ide_init_port_hw(hwif, hw);
731 hwif->quirkproc = quirkproc;
740 return hwif->present ? index : -1;
743 EXPORT_SYMBOL(ide_register_hw);
746 * Locks for IDE setting functionality
749 DEFINE_MUTEX(ide_setting_mtx);
751 EXPORT_SYMBOL_GPL(ide_setting_mtx);
754 * ide_spin_wait_hwgroup - wait for group
755 * @drive: drive in the group
757 * Wait for an IDE device group to go non busy and then return
758 * holding the ide_lock which guards the hwgroup->busy status
759 * and right to use it.
762 int ide_spin_wait_hwgroup (ide_drive_t *drive)
764 ide_hwgroup_t *hwgroup = HWGROUP(drive);
765 unsigned long timeout = jiffies + (3 * HZ);
767 spin_lock_irq(&ide_lock);
769 while (hwgroup->busy) {
770 unsigned long lflags;
771 spin_unlock_irq(&ide_lock);
772 local_irq_set(lflags);
773 if (time_after(jiffies, timeout)) {
774 local_irq_restore(lflags);
775 printk(KERN_ERR "%s: channel busy\n", drive->name);
778 local_irq_restore(lflags);
779 spin_lock_irq(&ide_lock);
784 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
786 int set_io_32bit(ide_drive_t *drive, int arg)
788 if (drive->no_io_32bit)
791 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
794 if (ide_spin_wait_hwgroup(drive))
797 drive->io_32bit = arg;
798 #ifdef CONFIG_BLK_DEV_DTC2278
799 if (HWIF(drive)->chipset == ide_dtc2278)
800 HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
801 #endif /* CONFIG_BLK_DEV_DTC2278 */
803 spin_unlock_irq(&ide_lock);
808 static int set_ksettings(ide_drive_t *drive, int arg)
810 if (arg < 0 || arg > 1)
813 if (ide_spin_wait_hwgroup(drive))
815 drive->keep_settings = arg;
816 spin_unlock_irq(&ide_lock);
821 int set_using_dma(ide_drive_t *drive, int arg)
823 #ifdef CONFIG_BLK_DEV_IDEDMA
824 ide_hwif_t *hwif = drive->hwif;
827 if (arg < 0 || arg > 1)
830 if (!drive->id || !(drive->id->capability & 1))
833 if (hwif->dma_host_set == NULL)
837 if (ide_spin_wait_hwgroup(drive))
840 * set ->busy flag, unlock and let it ride
842 hwif->hwgroup->busy = 1;
843 spin_unlock_irq(&ide_lock);
848 if (ide_set_dma(drive))
854 * lock, clear ->busy flag and unlock before leaving
856 spin_lock_irq(&ide_lock);
857 hwif->hwgroup->busy = 0;
858 spin_unlock_irq(&ide_lock);
862 if (arg < 0 || arg > 1)
869 int set_pio_mode(ide_drive_t *drive, int arg)
873 if (arg < 0 || arg > 255)
876 if (drive->hwif->set_pio_mode == NULL)
879 if (drive->special.b.set_tune)
881 ide_init_drive_cmd(&rq);
882 drive->tune_req = (u8) arg;
883 drive->special.b.set_tune = 1;
884 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
888 static int set_unmaskirq(ide_drive_t *drive, int arg)
890 if (drive->no_unmask)
893 if (arg < 0 || arg > 1)
896 if (ide_spin_wait_hwgroup(drive))
899 spin_unlock_irq(&ide_lock);
905 * system_bus_clock - clock guess
907 * External version of the bus clock guess used by very old IDE drivers
908 * for things like VLB timings. Should not be used.
911 int system_bus_clock (void)
913 return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
916 EXPORT_SYMBOL(system_bus_clock);
918 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
920 ide_drive_t *drive = dev->driver_data;
921 ide_hwif_t *hwif = HWIF(drive);
923 struct request_pm_state rqpm;
927 /* Call ACPI _GTM only once */
928 if (!(drive->dn % 2))
929 ide_acpi_get_timing(hwif);
931 memset(&rq, 0, sizeof(rq));
932 memset(&rqpm, 0, sizeof(rqpm));
933 memset(&args, 0, sizeof(args));
934 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
937 rqpm.pm_step = ide_pm_state_start_suspend;
938 if (mesg.event == PM_EVENT_PRETHAW)
939 mesg.event = PM_EVENT_FREEZE;
940 rqpm.pm_state = mesg.event;
942 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
943 /* only call ACPI _PS3 after both drivers are suspended */
944 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
945 && hwif->drives[1].present)
946 || !hwif->drives[0].present
947 || !hwif->drives[1].present))
948 ide_acpi_set_state(hwif, 0);
952 static int generic_ide_resume(struct device *dev)
954 ide_drive_t *drive = dev->driver_data;
955 ide_hwif_t *hwif = HWIF(drive);
957 struct request_pm_state rqpm;
961 /* Call ACPI _STM only once */
962 if (!(drive->dn % 2)) {
963 ide_acpi_set_state(hwif, 1);
964 ide_acpi_push_timing(hwif);
967 ide_acpi_exec_tfs(drive);
969 memset(&rq, 0, sizeof(rq));
970 memset(&rqpm, 0, sizeof(rqpm));
971 memset(&args, 0, sizeof(args));
972 rq.cmd_type = REQ_TYPE_PM_RESUME;
975 rqpm.pm_step = ide_pm_state_start_resume;
976 rqpm.pm_state = PM_EVENT_ON;
978 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
980 if (err == 0 && dev->driver) {
981 ide_driver_t *drv = to_ide_driver(dev->driver);
990 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
991 unsigned int cmd, unsigned long arg)
995 void __user *p = (void __user *)arg;
996 int err = 0, (*setfunc)(ide_drive_t *, int);
1000 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
1001 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
1002 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
1003 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
1004 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
1005 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
1006 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
1007 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
1008 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
1012 case HDIO_OBSOLETE_IDENTITY:
1013 case HDIO_GET_IDENTITY:
1014 if (bdev != bdev->bd_contains)
1016 if (drive->id_read == 0)
1018 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
1023 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
1024 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
1025 drive->nice0 << IDE_NICE_0 |
1026 drive->nice1 << IDE_NICE_1 |
1027 drive->nice2 << IDE_NICE_2,
1028 (long __user *) arg);
1030 #ifdef CONFIG_IDE_TASK_IOCTL
1031 case HDIO_DRIVE_TASKFILE:
1032 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
1034 switch(drive->media) {
1036 return ide_taskfile_ioctl(drive, cmd, arg);
1040 #endif /* CONFIG_IDE_TASK_IOCTL */
1042 case HDIO_DRIVE_CMD:
1043 if (!capable(CAP_SYS_RAWIO))
1045 return ide_cmd_ioctl(drive, cmd, arg);
1047 case HDIO_DRIVE_TASK:
1048 if (!capable(CAP_SYS_RAWIO))
1050 return ide_task_ioctl(drive, cmd, arg);
1052 case HDIO_SCAN_HWIF:
1056 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1057 if (copy_from_user(args, p, 3 * sizeof(int)))
1059 memset(&hw, 0, sizeof(hw));
1060 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1061 (unsigned long) args[1], NULL);
1063 if (ide_register_hw(&hw, NULL, NULL) == -1)
1067 case HDIO_UNREGISTER_HWIF:
1068 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1069 /* (arg > MAX_HWIFS) checked in function */
1070 ide_unregister(arg);
1073 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1074 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1076 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1077 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1078 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1079 drive->dsc_overlap = 0;
1082 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1084 case HDIO_DRIVE_RESET:
1086 unsigned long flags;
1087 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1090 * Abort the current command on the
1091 * group if there is one, taking
1092 * care not to allow anything else
1093 * to be queued and to die on the
1094 * spot if we miss one somehow
1097 spin_lock_irqsave(&ide_lock, flags);
1099 if (HWGROUP(drive)->resetting) {
1100 spin_unlock_irqrestore(&ide_lock, flags);
1104 ide_abort(drive, "drive reset");
1106 BUG_ON(HWGROUP(drive)->handler);
1108 /* Ensure nothing gets queued after we
1109 drop the lock. Reset will clear the busy */
1111 HWGROUP(drive)->busy = 1;
1112 spin_unlock_irqrestore(&ide_lock, flags);
1113 (void) ide_do_reset(drive);
1118 case HDIO_GET_BUSSTATE:
1119 if (!capable(CAP_SYS_ADMIN))
1121 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1125 case HDIO_SET_BUSSTATE:
1126 if (!capable(CAP_SYS_ADMIN))
1128 if (HWIF(drive)->busproc)
1129 return HWIF(drive)->busproc(drive, (int)arg);
1136 mutex_lock(&ide_setting_mtx);
1137 spin_lock_irqsave(&ide_lock, flags);
1139 spin_unlock_irqrestore(&ide_lock, flags);
1140 mutex_unlock(&ide_setting_mtx);
1141 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1144 if (bdev != bdev->bd_contains)
1147 if (!capable(CAP_SYS_ADMIN))
1150 mutex_lock(&ide_setting_mtx);
1151 err = setfunc(drive, arg);
1152 mutex_unlock(&ide_setting_mtx);
1158 EXPORT_SYMBOL(generic_ide_ioctl);
1161 * stridx() returns the offset of c within s,
1162 * or -1 if c is '\0' or not found within s.
1164 static int __init stridx (const char *s, char c)
1166 char *i = strchr(s, c);
1167 return (i && c) ? i - s : -1;
1171 * match_parm() does parsing for ide_setup():
1173 * 1. the first char of s must be '='.
1174 * 2. if the remainder matches one of the supplied keywords,
1175 * the index (1 based) of the keyword is negated and returned.
1176 * 3. if the remainder is a series of no more than max_vals numbers
1177 * separated by commas, the numbers are saved in vals[] and a
1178 * count of how many were saved is returned. Base10 is assumed,
1179 * and base16 is allowed when prefixed with "0x".
1180 * 4. otherwise, zero is returned.
1182 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1184 static const char *decimal = "0123456789";
1185 static const char *hex = "0123456789abcdef";
1190 * Try matching against the supplied keywords,
1191 * and return -(index+1) if we match one
1193 if (keywords != NULL) {
1194 for (i = 0; *keywords != NULL; ++i) {
1195 if (!strcmp(s, *keywords++))
1200 * Look for a series of no more than "max_vals"
1201 * numeric values separated by commas, in base10,
1202 * or base16 when prefixed with "0x".
1203 * Return a count of how many were found.
1205 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1207 while ((i = stridx(decimal, *++s)) >= 0)
1208 vals[n] = (vals[n] * 10) + i;
1209 if (*s == 'x' && !vals[n]) {
1210 while ((i = stridx(hex, *++s)) >= 0)
1211 vals[n] = (vals[n] * 0x10) + i;
1213 if (++n == max_vals)
1215 if (*s == ',' || *s == ';')
1221 return 0; /* zero = nothing matched */
1224 extern int probe_ali14xx;
1225 extern int probe_umc8672;
1226 extern int probe_dtc2278;
1227 extern int probe_ht6560b;
1228 extern int probe_qd65xx;
1229 extern int cmd640_vlb;
1231 static int __initdata is_chipset_set[MAX_HWIFS];
1234 * ide_setup() gets called VERY EARLY during initialization,
1235 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1237 * Remember to update Documentation/ide.txt if you change something here.
1239 static int __init ide_setup(char *s)
1244 unsigned int hw, unit;
1245 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1246 const char max_hwif = '0' + (MAX_HWIFS - 1);
1249 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1250 return 0; /* driver and not us */
1252 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1255 printk(KERN_INFO "ide_setup: %s", s);
1258 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1259 if (!strcmp(s, "ide=doubler")) {
1260 extern int ide_doubler;
1262 printk(" : Enabled support for IDE doublers\n");
1266 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1268 if (!strcmp(s, "ide=nodma")) {
1269 printk(" : Prevented DMA\n");
1271 goto obsolete_option;
1274 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1275 if (!strcmp(s, "ide=reverse")) {
1276 ide_scan_direction = 1;
1277 printk(" : Enabled support for IDE inverse scan order.\n");
1282 #ifdef CONFIG_BLK_DEV_IDEACPI
1283 if (!strcmp(s, "ide=noacpi")) {
1284 //printk(" : Disable IDE ACPI support.\n");
1288 if (!strcmp(s, "ide=acpigtf")) {
1289 //printk(" : Enable IDE ACPI _GTF support.\n");
1293 if (!strcmp(s, "ide=acpionboot")) {
1294 //printk(" : Call IDE ACPI methods on boot.\n");
1295 ide_noacpionboot = 0;
1298 #endif /* CONFIG_BLK_DEV_IDEACPI */
1301 * Look for drive options: "hdx="
1303 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1304 const char *hd_words[] = {
1305 "none", "noprobe", "nowerr", "cdrom", "nodma",
1306 "autotune", "noautotune", "minus8", "swapdata", "bswap",
1307 "noflush", "remap", "remap63", "scsi", NULL };
1309 hw = unit / MAX_DRIVES;
1310 unit = unit % MAX_DRIVES;
1311 hwif = &ide_hwifs[hw];
1312 drive = &hwif->drives[unit];
1313 if (strncmp(s + 4, "ide-", 4) == 0) {
1314 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1317 switch (match_parm(&s[3], hd_words, vals, 3)) {
1318 case -1: /* "none" */
1319 case -2: /* "noprobe" */
1322 case -3: /* "nowerr" */
1323 drive->bad_wstat = BAD_R_STAT;
1326 case -4: /* "cdrom" */
1328 drive->media = ide_cdrom;
1329 /* an ATAPI device ignores DRDY */
1330 drive->ready_stat = 0;
1333 case -5: /* nodma */
1336 case -6: /* "autotune" */
1337 drive->autotune = IDE_TUNE_AUTO;
1338 goto obsolete_option;
1339 case -7: /* "noautotune" */
1340 drive->autotune = IDE_TUNE_NOAUTO;
1341 goto obsolete_option;
1342 case -9: /* "swapdata" */
1343 case -10: /* "bswap" */
1346 case -11: /* noflush */
1349 case -12: /* "remap" */
1350 drive->remap_0_to_1 = 1;
1352 case -13: /* "remap63" */
1355 case -14: /* "scsi" */
1358 case 3: /* cyl,head,sect */
1359 drive->media = ide_disk;
1360 drive->ready_stat = READY_STAT;
1361 drive->cyl = drive->bios_cyl = vals[0];
1362 drive->head = drive->bios_head = vals[1];
1363 drive->sect = drive->bios_sect = vals[2];
1365 drive->forced_geom = 1;
1373 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1376 * Look for bus speed option: "idebus="
1378 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1379 if (match_parm(&s[6], NULL, vals, 1) != 1)
1381 if (vals[0] >= 20 && vals[0] <= 66) {
1382 idebus_parameter = vals[0];
1384 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1388 * Look for interface options: "idex="
1390 if (s[3] >= '0' && s[3] <= max_hwif) {
1392 * Be VERY CAREFUL changing this: note hardcoded indexes below
1393 * (-8, -9, -10) are reserved to ease the hardcoding.
1395 static const char *ide_words[] = {
1396 "noprobe", "serialize", "minus3", "minus4",
1397 "reset", "minus6", "ata66", "minus8", "minus9",
1398 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1399 "dtc2278", "umc8672", "ali14xx", NULL };
1404 hwif = &ide_hwifs[hw];
1405 i = match_parm(&s[4], ide_words, vals, 3);
1408 * Cryptic check to ensure chipset not already set for hwif.
1409 * Note: we can't depend on hwif->chipset here.
1411 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1412 /* chipset already specified */
1413 if (is_chipset_set[hw])
1415 if (i > -18 && i <= -11) {
1416 /* these drivers are for "ide0=" only */
1419 /* chipset already specified for 2nd port */
1420 if (is_chipset_set[hw+1])
1423 is_chipset_set[hw] = 1;
1428 #ifdef CONFIG_BLK_DEV_ALI14XX
1429 case -17: /* "ali14xx" */
1433 #ifdef CONFIG_BLK_DEV_UMC8672
1434 case -16: /* "umc8672" */
1438 #ifdef CONFIG_BLK_DEV_DTC2278
1439 case -15: /* "dtc2278" */
1443 #ifdef CONFIG_BLK_DEV_CMD640
1444 case -14: /* "cmd640_vlb" */
1448 #ifdef CONFIG_BLK_DEV_HT6560B
1449 case -13: /* "ht6560b" */
1453 #ifdef CONFIG_BLK_DEV_QD65XX
1454 case -12: /* "qd65xx" */
1458 #ifdef CONFIG_BLK_DEV_4DRIVES
1459 case -11: /* "four" drives on one set of ports */
1461 ide_hwif_t *mate = &ide_hwifs[hw^1];
1462 mate->drives[0].select.all ^= 0x20;
1463 mate->drives[1].select.all ^= 0x20;
1464 hwif->chipset = mate->chipset = ide_4drives;
1465 mate->irq = hwif->irq;
1466 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1469 hwif->serialized = mate->serialized = 1;
1470 goto obsolete_option;
1472 #endif /* CONFIG_BLK_DEV_4DRIVES */
1473 case -10: /* minus10 */
1474 case -9: /* minus9 */
1475 case -8: /* minus8 */
1480 case -7: /* ata66 */
1481 #ifdef CONFIG_BLK_DEV_IDEPCI
1483 * Use ATA_CBL_PATA40_SHORT so drive side
1484 * cable detection is also overriden.
1486 hwif->cbl = ATA_CBL_PATA40_SHORT;
1487 goto obsolete_option;
1491 case -5: /* "reset" */
1493 goto obsolete_option;
1494 case -2: /* "serialize" */
1495 hwif->mate = &ide_hwifs[hw^1];
1496 hwif->mate->mate = hwif;
1497 hwif->serialized = hwif->mate->serialized = 1;
1498 goto obsolete_option;
1500 case -1: /* "noprobe" */
1505 vals[1] = vals[0] + 0x206; /* default ctl */
1506 case 2: /* base,ctl */
1507 vals[2] = 0; /* default irq = probe for it */
1508 case 3: /* base,ctl,irq */
1509 memset(&hwregs, 0, sizeof(hwregs));
1510 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1511 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1512 hwif->irq = vals[2];
1514 hwif->chipset = ide_forced;
1515 goto obsolete_option;
1517 case 0: goto bad_option;
1519 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1524 printk(" -- BAD OPTION\n");
1527 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1530 printk("-- NOT SUPPORTED ON ide%d", hw);
1536 EXPORT_SYMBOL(ide_lock);
1538 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1543 static char *media_string(ide_drive_t *drive)
1545 switch (drive->media) {
1561 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1563 ide_drive_t *drive = to_ide_device(dev);
1564 return sprintf(buf, "%s\n", media_string(drive));
1567 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1569 ide_drive_t *drive = to_ide_device(dev);
1570 return sprintf(buf, "%s\n", drive->name);
1573 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1575 ide_drive_t *drive = to_ide_device(dev);
1576 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1579 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1582 ide_drive_t *drive = to_ide_device(dev);
1583 return sprintf(buf, "%s\n", drive->id->model);
1586 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1589 ide_drive_t *drive = to_ide_device(dev);
1590 return sprintf(buf, "%s\n", drive->id->fw_rev);
1593 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1596 ide_drive_t *drive = to_ide_device(dev);
1597 return sprintf(buf, "%s\n", drive->id->serial_no);
1600 static struct device_attribute ide_dev_attrs[] = {
1602 __ATTR_RO(drivename),
1603 __ATTR_RO(modalias),
1605 __ATTR_RO(firmware),
1606 __ATTR(serial, 0400, serial_show, NULL),
1610 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1612 ide_drive_t *drive = to_ide_device(dev);
1614 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1615 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1616 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1620 static int generic_ide_probe(struct device *dev)
1622 ide_drive_t *drive = to_ide_device(dev);
1623 ide_driver_t *drv = to_ide_driver(dev->driver);
1625 return drv->probe ? drv->probe(drive) : -ENODEV;
1628 static int generic_ide_remove(struct device *dev)
1630 ide_drive_t *drive = to_ide_device(dev);
1631 ide_driver_t *drv = to_ide_driver(dev->driver);
1639 static void generic_ide_shutdown(struct device *dev)
1641 ide_drive_t *drive = to_ide_device(dev);
1642 ide_driver_t *drv = to_ide_driver(dev->driver);
1644 if (dev->driver && drv->shutdown)
1645 drv->shutdown(drive);
1648 struct bus_type ide_bus_type = {
1650 .match = ide_bus_match,
1651 .uevent = ide_uevent,
1652 .probe = generic_ide_probe,
1653 .remove = generic_ide_remove,
1654 .shutdown = generic_ide_shutdown,
1655 .dev_attrs = ide_dev_attrs,
1656 .suspend = generic_ide_suspend,
1657 .resume = generic_ide_resume,
1660 EXPORT_SYMBOL_GPL(ide_bus_type);
1663 * This is gets invoked once during initialization, to set *everything* up
1665 static int __init ide_init(void)
1669 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
1670 system_bus_speed = ide_system_bus_speed();
1672 ret = bus_register(&ide_bus_type);
1674 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1686 static char *options = NULL;
1687 module_param(options, charp, 0);
1688 MODULE_LICENSE("GPL");
1690 static void __init parse_options (char *line)
1694 if (line == NULL || !*line)
1696 while ((line = next) != NULL) {
1697 if ((next = strchr(line,' ')) != NULL)
1699 if (!ide_setup(line))
1700 printk (KERN_INFO "Unknown option '%s'\n", line);
1704 int __init init_module (void)
1706 parse_options(options);
1710 void __exit cleanup_module (void)
1714 for (index = 0; index < MAX_HWIFS; ++index)
1715 ide_unregister(index);
1719 bus_unregister(&ide_bus_type);
1724 __setup("", ide_setup);
1726 module_init(ide_init);