2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
7 * Mostly written by Mark Lord <mlord@pobox.com>
8 * and Gadi Oxman <gadio@netvision.net.il>
9 * and Andre Hedrick <andre@linux-ide.org>
11 * See linux/MAINTAINERS for address of current maintainer.
13 * This is the multiple IDE interface driver, as evolved from hd.c.
14 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
16 * There can be up to two drives per interface, as per the ATA-2 spec.
22 * | It traverses the request-list, using interrupts to jump between functions.
23 * | As nearly all functions can be called within interrupts, we may not sleep.
24 * | Special care is recommended. Have Fun!
26 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
28 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29 * | in the early extended-partition checks and added DM partitions.
31 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
33 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34 * | and general streamlining by Mark Lord (mlord@pobox.com).
36 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
38 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
39 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
40 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
42 * This was a rewrite of just about everything from hd.c, though some original
43 * code is still sprinkled about. Think of it as a major evolution, with
44 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
47 #define _IDE_C /* Tell ide.h it's really us */
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
72 #include <asm/byteorder.h>
74 #include <asm/uaccess.h>
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES 1
81 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
82 IDE2_MAJOR, IDE3_MAJOR,
83 IDE4_MAJOR, IDE5_MAJOR,
84 IDE6_MAJOR, IDE7_MAJOR,
85 IDE8_MAJOR, IDE9_MAJOR };
87 static int idebus_parameter; /* holds the "idebus=" parameter */
88 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
90 DEFINE_MUTEX(ide_cfg_mtx);
91 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
93 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
94 int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
99 #ifdef CONFIG_BLK_DEV_IDEACPI
101 int ide_noacpitfs = 1;
102 int ide_noacpionboot = 1;
106 * This is declared extern in ide.h, for access by other IDE modules:
108 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
110 EXPORT_SYMBOL(ide_hwifs);
113 * Do not even *think* about calling this!
115 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
119 /* bulk initialize hwif & drive info with zeros */
120 memset(hwif, 0, sizeof(ide_hwif_t));
122 /* fill in any non-zero initial values */
124 hwif->major = ide_hwif_to_major[index];
129 hwif->name[3] = '0' + index;
131 hwif->bus_state = BUSSTATE_ON;
133 init_completion(&hwif->gendev_rel_comp);
135 default_hwif_iops(hwif);
136 default_hwif_transport(hwif);
137 for (unit = 0; unit < MAX_DRIVES; ++unit) {
138 ide_drive_t *drive = &hwif->drives[unit];
140 drive->media = ide_disk;
141 drive->select.all = (unit<<4)|0xa0;
144 drive->ready_stat = READY_STAT;
145 drive->bad_wstat = BAD_W_STAT;
146 drive->special.b.recalibrate = 1;
147 drive->special.b.set_geometry = 1;
148 drive->name[0] = 'h';
149 drive->name[1] = 'd';
150 drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
151 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
152 drive->using_dma = 0;
154 INIT_LIST_HEAD(&drive->list);
155 init_completion(&drive->gendev_rel_comp);
158 EXPORT_SYMBOL_GPL(ide_init_port_data);
160 static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
164 memset(&hw, 0, sizeof(hw_regs_t));
166 ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
168 memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
170 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
171 #ifdef CONFIG_BLK_DEV_HD
172 if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
173 hwif->noprobe = 1; /* may be overridden by ide_setup() */
178 * init_ide_data() sets reasonable default values into all fields
179 * of all instances of the hwifs and drives, but only on the first call.
180 * Subsequent calls have no effect (they don't wipe out anything).
182 * This routine is normally called at driver initialization time,
183 * but may also be called MUCH earlier during kernel "command-line"
184 * parameter processing. As such, we cannot depend on any other parts
185 * of the kernel (such as memory allocation) to be functioning yet.
187 * This is too bad, as otherwise we could dynamically allocate the
188 * ide_drive_t structs as needed, rather than always consuming memory
189 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
191 * FIXME: We should stuff the setup data into __init and copy the
192 * relevant hwifs/allocate them properly during boot.
194 #define MAGIC_COOKIE 0x12345678
195 static void __init init_ide_data (void)
199 static unsigned long magic_cookie = MAGIC_COOKIE;
201 if (magic_cookie != MAGIC_COOKIE)
202 return; /* already initialized */
205 /* Initialise all interface structures */
206 for (index = 0; index < MAX_HWIFS; ++index) {
207 hwif = &ide_hwifs[index];
208 ide_init_port_data(hwif, index);
209 init_hwif_default(hwif, index);
210 #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
212 ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
218 * ide_system_bus_speed - guess bus speed
220 * ide_system_bus_speed() returns what we think is the system VESA/PCI
221 * bus speed (in MHz). This is used for calculating interface PIO timings.
222 * The default is 40 for known PCI systems, 50 otherwise.
223 * The "idebus=xx" parameter can be used to override this value.
224 * The actual value to be used is computed/displayed the first time
225 * through. Drivers should only use this as a last resort.
227 * Returns a guessed speed in MHz.
230 static int ide_system_bus_speed(void)
233 static struct pci_device_id pci_default[] = {
234 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
238 #define pci_default 0
239 #endif /* CONFIG_PCI */
241 /* user supplied value */
242 if (idebus_parameter)
243 return idebus_parameter;
245 /* safe default value for PCI or VESA and PCI*/
246 return pci_dev_present(pci_default) ? 33 : 50;
249 ide_hwif_t * ide_find_port(unsigned long base)
254 for (i = 0; i < MAX_HWIFS; i++) {
255 hwif = &ide_hwifs[i];
256 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
260 for (i = 0; i < MAX_HWIFS; i++) {
261 hwif = &ide_hwifs[i];
262 if (hwif->io_ports[IDE_DATA_OFFSET] == 0)
271 EXPORT_SYMBOL_GPL(ide_find_port);
273 static struct resource* hwif_request_region(ide_hwif_t *hwif,
274 unsigned long addr, int num)
276 struct resource *res = request_region(addr, num, hwif->name);
279 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
280 hwif->name, addr, addr+num-1);
285 * ide_hwif_request_regions - request resources for IDE
286 * @hwif: interface to use
288 * Requests all the needed resources for an interface.
289 * Right now core IDE code does this work which is deeply wrong.
290 * MMIO leaves it to the controller driver,
291 * PIO will migrate this way over time.
294 int ide_hwif_request_regions(ide_hwif_t *hwif)
301 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
302 if (addr && !hwif_request_region(hwif, addr, 1))
303 goto control_region_busy;
305 addr = hwif->io_ports[IDE_DATA_OFFSET];
306 if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
307 if (!hwif_request_region(hwif, addr, 8))
308 goto data_region_busy;
312 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
313 addr = hwif->io_ports[i];
314 if (!hwif_request_region(hwif, addr, 1)) {
316 release_region(addr, 1);
317 goto data_region_busy;
323 addr = hwif->io_ports[IDE_CONTROL_OFFSET];
325 release_region(addr, 1);
327 /* If any errors are return, we drop the hwif interface. */
332 * ide_hwif_release_regions - free IDE resources
334 * Note that we only release the standard ports,
335 * and do not even try to handle any extra ports
336 * allocated for weird IDE interface chipsets.
338 * Note also that we don't yet handle mmio resources here. More
339 * importantly our caller should be doing this so we need to
340 * restructure this as a helper function for drivers.
343 void ide_hwif_release_regions(ide_hwif_t *hwif)
349 if (hwif->io_ports[IDE_CONTROL_OFFSET])
350 release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
351 if (hwif->straight8) {
352 release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
355 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
356 if (hwif->io_ports[i])
357 release_region(hwif->io_ports[i], 1);
361 * ide_hwif_restore - restore hwif to template
362 * @hwif: hwif to update
363 * @tmp_hwif: template
365 * Restore hwif to a previous state by copying most settings
369 static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
371 hwif->hwgroup = tmp_hwif->hwgroup;
373 hwif->gendev.parent = tmp_hwif->gendev.parent;
375 hwif->proc = tmp_hwif->proc;
377 hwif->major = tmp_hwif->major;
378 hwif->straight8 = tmp_hwif->straight8;
379 hwif->bus_state = tmp_hwif->bus_state;
381 hwif->host_flags = tmp_hwif->host_flags;
383 hwif->pio_mask = tmp_hwif->pio_mask;
385 hwif->ultra_mask = tmp_hwif->ultra_mask;
386 hwif->mwdma_mask = tmp_hwif->mwdma_mask;
387 hwif->swdma_mask = tmp_hwif->swdma_mask;
389 hwif->cbl = tmp_hwif->cbl;
391 hwif->chipset = tmp_hwif->chipset;
392 hwif->hold = tmp_hwif->hold;
394 hwif->dev = tmp_hwif->dev;
396 #ifdef CONFIG_BLK_DEV_IDEPCI
397 hwif->cds = tmp_hwif->cds;
400 hwif->set_pio_mode = tmp_hwif->set_pio_mode;
401 hwif->set_dma_mode = tmp_hwif->set_dma_mode;
402 hwif->mdma_filter = tmp_hwif->mdma_filter;
403 hwif->udma_filter = tmp_hwif->udma_filter;
404 hwif->selectproc = tmp_hwif->selectproc;
405 hwif->reset_poll = tmp_hwif->reset_poll;
406 hwif->pre_reset = tmp_hwif->pre_reset;
407 hwif->resetproc = tmp_hwif->resetproc;
408 hwif->maskproc = tmp_hwif->maskproc;
409 hwif->quirkproc = tmp_hwif->quirkproc;
410 hwif->busproc = tmp_hwif->busproc;
412 hwif->ata_input_data = tmp_hwif->ata_input_data;
413 hwif->ata_output_data = tmp_hwif->ata_output_data;
414 hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes;
415 hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes;
417 hwif->dma_host_set = tmp_hwif->dma_host_set;
418 hwif->dma_setup = tmp_hwif->dma_setup;
419 hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd;
420 hwif->dma_start = tmp_hwif->dma_start;
421 hwif->ide_dma_end = tmp_hwif->ide_dma_end;
422 hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
423 hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
424 hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
425 hwif->dma_timeout = tmp_hwif->dma_timeout;
427 hwif->OUTB = tmp_hwif->OUTB;
428 hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
429 hwif->OUTW = tmp_hwif->OUTW;
430 hwif->OUTSW = tmp_hwif->OUTSW;
431 hwif->OUTSL = tmp_hwif->OUTSL;
433 hwif->INB = tmp_hwif->INB;
434 hwif->INW = tmp_hwif->INW;
435 hwif->INSW = tmp_hwif->INSW;
436 hwif->INSL = tmp_hwif->INSL;
438 hwif->sg_max_nents = tmp_hwif->sg_max_nents;
440 hwif->mmio = tmp_hwif->mmio;
441 hwif->rqsize = tmp_hwif->rqsize;
443 #ifndef CONFIG_BLK_DEV_IDECS
444 hwif->irq = tmp_hwif->irq;
447 hwif->dma_base = tmp_hwif->dma_base;
448 hwif->dma_command = tmp_hwif->dma_command;
449 hwif->dma_vendor1 = tmp_hwif->dma_vendor1;
450 hwif->dma_status = tmp_hwif->dma_status;
451 hwif->dma_vendor3 = tmp_hwif->dma_vendor3;
452 hwif->dma_prdtable = tmp_hwif->dma_prdtable;
454 hwif->config_data = tmp_hwif->config_data;
455 hwif->select_data = tmp_hwif->select_data;
456 hwif->extra_base = tmp_hwif->extra_base;
457 hwif->extra_ports = tmp_hwif->extra_ports;
459 hwif->hwif_data = tmp_hwif->hwif_data;
462 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
464 ide_hwgroup_t *hwgroup = hwif->hwgroup;
466 spin_lock_irq(&ide_lock);
468 * Remove us from the hwgroup, and free
469 * the hwgroup if we were the only member
471 if (hwif->next == hwif) {
472 BUG_ON(hwgroup->hwif != hwif);
475 /* There is another interface in hwgroup.
476 * Unlink us, and set hwgroup->drive and ->hwif to
479 ide_hwif_t *g = hwgroup->hwif;
481 while (g->next != hwif)
483 g->next = hwif->next;
484 if (hwgroup->hwif == hwif) {
485 /* Chose a random hwif for hwgroup->hwif.
486 * It's guaranteed that there are no drives
487 * left in the hwgroup.
489 BUG_ON(hwgroup->drive != NULL);
492 BUG_ON(hwgroup->hwif == hwif);
494 spin_unlock_irq(&ide_lock);
498 * ide_unregister - free an IDE interface
499 * @index: index of interface (will change soon to a pointer)
500 * @init_default: init default hwif flag
501 * @restore: restore hwif flag
503 * Perform the final unregister of an IDE interface. At the moment
504 * we don't refcount interfaces so this will also get split up.
507 * The caller must not hold the IDE locks
508 * The drive present/vanishing is not yet properly locked
509 * Take care with the callbacks. These have been split to avoid
510 * deadlocking the IDE layer. The shutdown callback is called
511 * before we take the lock and free resources. It is up to the
512 * caller to be sure there is no pending I/O here, and that
513 * the interface will not be reopened (present/vanishing locking
514 * isn't yet done BTW). After we commit to the final kill we
515 * call the cleanup callback with the ide locks held.
517 * Unregister restores the hwif structures to the default state.
518 * This is raving bonkers.
521 void ide_unregister(unsigned int index, int init_default, int restore)
524 ide_hwif_t *hwif, *g;
525 static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
526 ide_hwgroup_t *hwgroup;
527 int irq_count = 0, unit;
529 BUG_ON(index >= MAX_HWIFS);
531 BUG_ON(in_interrupt());
532 BUG_ON(irqs_disabled());
533 mutex_lock(&ide_cfg_mtx);
534 spin_lock_irq(&ide_lock);
535 hwif = &ide_hwifs[index];
538 for (unit = 0; unit < MAX_DRIVES; ++unit) {
539 drive = &hwif->drives[unit];
542 spin_unlock_irq(&ide_lock);
543 device_unregister(&drive->gendev);
544 wait_for_completion(&drive->gendev_rel_comp);
545 spin_lock_irq(&ide_lock);
549 spin_unlock_irq(&ide_lock);
551 ide_proc_unregister_port(hwif);
553 hwgroup = hwif->hwgroup;
555 * free the irq if we were the only hwif using it
559 if (g->irq == hwif->irq)
562 } while (g != hwgroup->hwif);
564 free_irq(hwif->irq, hwgroup);
566 ide_remove_port_from_hwgroup(hwif);
568 device_unregister(&hwif->gendev);
569 wait_for_completion(&hwif->gendev_rel_comp);
572 * Remove us from the kernel's knowledge
574 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
575 kfree(hwif->sg_table);
576 unregister_blkdev(hwif->major, hwif->name);
577 spin_lock_irq(&ide_lock);
579 if (hwif->dma_base) {
580 (void) ide_release_dma(hwif);
583 hwif->dma_command = 0;
584 hwif->dma_vendor1 = 0;
585 hwif->dma_status = 0;
586 hwif->dma_vendor3 = 0;
587 hwif->dma_prdtable = 0;
589 hwif->extra_base = 0;
590 hwif->extra_ports = 0;
593 ide_hwif_release_regions(hwif);
595 /* copy original settings */
598 /* restore hwif data to pristine status */
599 ide_init_port_data(hwif, index);
602 init_hwif_default(hwif, index);
605 ide_hwif_restore(hwif, &tmp_hwif);
608 spin_unlock_irq(&ide_lock);
609 mutex_unlock(&ide_cfg_mtx);
612 EXPORT_SYMBOL(ide_unregister);
614 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
616 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
619 hwif->chipset = hw->chipset;
620 hwif->gendev.parent = hw->dev;
621 hwif->ack_intr = hw->ack_intr;
623 EXPORT_SYMBOL_GPL(ide_init_port_hw);
625 ide_hwif_t *ide_deprecated_find_port(unsigned long base)
630 for (i = 0; i < MAX_HWIFS; i++) {
631 hwif = &ide_hwifs[i];
632 if (hwif->io_ports[IDE_DATA_OFFSET] == base)
636 for (i = 0; i < MAX_HWIFS; i++) {
637 hwif = &ide_hwifs[i];
640 if (!hwif->present && hwif->mate == NULL)
648 EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
651 * ide_register_hw - register IDE interface
652 * @hw: hardware registers
653 * @quirkproc: quirkproc function
654 * @hwifp: pointer to returned hwif
656 * Register an IDE interface, specifying exactly the registers etc.
658 * Returns -1 on error.
661 int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
664 int index, retry = 1;
666 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
669 hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
673 for (index = 0; index < MAX_HWIFS; index++)
674 ide_unregister(index, 1, 1);
679 ide_unregister(index, 0, 1);
680 else if (!hwif->hold)
681 ide_init_port_data(hwif, index);
683 ide_init_port_hw(hwif, hw);
684 hwif->quirkproc = quirkproc;
688 ide_device_add(idx, NULL);
693 return hwif->present ? index : -1;
696 EXPORT_SYMBOL(ide_register_hw);
699 * Locks for IDE setting functionality
702 DEFINE_MUTEX(ide_setting_mtx);
704 EXPORT_SYMBOL_GPL(ide_setting_mtx);
707 * ide_spin_wait_hwgroup - wait for group
708 * @drive: drive in the group
710 * Wait for an IDE device group to go non busy and then return
711 * holding the ide_lock which guards the hwgroup->busy status
712 * and right to use it.
715 int ide_spin_wait_hwgroup (ide_drive_t *drive)
717 ide_hwgroup_t *hwgroup = HWGROUP(drive);
718 unsigned long timeout = jiffies + (3 * HZ);
720 spin_lock_irq(&ide_lock);
722 while (hwgroup->busy) {
723 unsigned long lflags;
724 spin_unlock_irq(&ide_lock);
725 local_irq_set(lflags);
726 if (time_after(jiffies, timeout)) {
727 local_irq_restore(lflags);
728 printk(KERN_ERR "%s: channel busy\n", drive->name);
731 local_irq_restore(lflags);
732 spin_lock_irq(&ide_lock);
737 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
739 int set_io_32bit(ide_drive_t *drive, int arg)
741 if (drive->no_io_32bit)
744 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
747 if (ide_spin_wait_hwgroup(drive))
750 drive->io_32bit = arg;
752 spin_unlock_irq(&ide_lock);
757 static int set_ksettings(ide_drive_t *drive, int arg)
759 if (arg < 0 || arg > 1)
762 if (ide_spin_wait_hwgroup(drive))
764 drive->keep_settings = arg;
765 spin_unlock_irq(&ide_lock);
770 int set_using_dma(ide_drive_t *drive, int arg)
772 #ifdef CONFIG_BLK_DEV_IDEDMA
773 ide_hwif_t *hwif = drive->hwif;
776 if (arg < 0 || arg > 1)
779 if (!drive->id || !(drive->id->capability & 1))
782 if (hwif->dma_host_set == NULL)
786 if (ide_spin_wait_hwgroup(drive))
789 * set ->busy flag, unlock and let it ride
791 hwif->hwgroup->busy = 1;
792 spin_unlock_irq(&ide_lock);
797 if (ide_set_dma(drive))
803 * lock, clear ->busy flag and unlock before leaving
805 spin_lock_irq(&ide_lock);
806 hwif->hwgroup->busy = 0;
807 spin_unlock_irq(&ide_lock);
811 if (arg < 0 || arg > 1)
818 int set_pio_mode(ide_drive_t *drive, int arg)
822 if (arg < 0 || arg > 255)
825 if (drive->hwif->set_pio_mode == NULL)
828 if (drive->special.b.set_tune)
831 ide_init_drive_cmd(&rq);
832 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
834 drive->tune_req = (u8) arg;
835 drive->special.b.set_tune = 1;
836 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
840 static int set_unmaskirq(ide_drive_t *drive, int arg)
842 if (drive->no_unmask)
845 if (arg < 0 || arg > 1)
848 if (ide_spin_wait_hwgroup(drive))
851 spin_unlock_irq(&ide_lock);
857 * system_bus_clock - clock guess
859 * External version of the bus clock guess used by very old IDE drivers
860 * for things like VLB timings. Should not be used.
863 int system_bus_clock (void)
865 return system_bus_speed;
868 EXPORT_SYMBOL(system_bus_clock);
870 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
872 ide_drive_t *drive = dev->driver_data;
873 ide_hwif_t *hwif = HWIF(drive);
875 struct request_pm_state rqpm;
879 /* Call ACPI _GTM only once */
880 if (!(drive->dn % 2))
881 ide_acpi_get_timing(hwif);
883 memset(&rq, 0, sizeof(rq));
884 memset(&rqpm, 0, sizeof(rqpm));
885 memset(&args, 0, sizeof(args));
886 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
889 rqpm.pm_step = ide_pm_state_start_suspend;
890 if (mesg.event == PM_EVENT_PRETHAW)
891 mesg.event = PM_EVENT_FREEZE;
892 rqpm.pm_state = mesg.event;
894 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
895 /* only call ACPI _PS3 after both drivers are suspended */
896 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
897 && hwif->drives[1].present)
898 || !hwif->drives[0].present
899 || !hwif->drives[1].present))
900 ide_acpi_set_state(hwif, 0);
904 static int generic_ide_resume(struct device *dev)
906 ide_drive_t *drive = dev->driver_data;
907 ide_hwif_t *hwif = HWIF(drive);
909 struct request_pm_state rqpm;
913 /* Call ACPI _STM only once */
914 if (!(drive->dn % 2)) {
915 ide_acpi_set_state(hwif, 1);
916 ide_acpi_push_timing(hwif);
919 ide_acpi_exec_tfs(drive);
921 memset(&rq, 0, sizeof(rq));
922 memset(&rqpm, 0, sizeof(rqpm));
923 memset(&args, 0, sizeof(args));
924 rq.cmd_type = REQ_TYPE_PM_RESUME;
927 rqpm.pm_step = ide_pm_state_start_resume;
928 rqpm.pm_state = PM_EVENT_ON;
930 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
932 if (err == 0 && dev->driver) {
933 ide_driver_t *drv = to_ide_driver(dev->driver);
942 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
943 unsigned int cmd, unsigned long arg)
947 void __user *p = (void __user *)arg;
948 int err = 0, (*setfunc)(ide_drive_t *, int);
952 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
953 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
954 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
955 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
956 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
957 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
958 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
959 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
960 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
964 case HDIO_OBSOLETE_IDENTITY:
965 case HDIO_GET_IDENTITY:
966 if (bdev != bdev->bd_contains)
968 if (drive->id_read == 0)
970 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
975 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
976 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
977 drive->nice1 << IDE_NICE_1,
978 (long __user *) arg);
979 #ifdef CONFIG_IDE_TASK_IOCTL
980 case HDIO_DRIVE_TASKFILE:
981 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
983 switch(drive->media) {
985 return ide_taskfile_ioctl(drive, cmd, arg);
989 #endif /* CONFIG_IDE_TASK_IOCTL */
992 if (!capable(CAP_SYS_RAWIO))
994 return ide_cmd_ioctl(drive, cmd, arg);
996 case HDIO_DRIVE_TASK:
997 if (!capable(CAP_SYS_RAWIO))
999 return ide_task_ioctl(drive, cmd, arg);
1001 case HDIO_SCAN_HWIF:
1005 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1006 if (copy_from_user(args, p, 3 * sizeof(int)))
1008 memset(&hw, 0, sizeof(hw));
1009 ide_init_hwif_ports(&hw, (unsigned long) args[0],
1010 (unsigned long) args[1], NULL);
1012 if (ide_register_hw(&hw, NULL, NULL) == -1)
1016 case HDIO_UNREGISTER_HWIF:
1017 if (!capable(CAP_SYS_RAWIO)) return -EACCES;
1018 /* (arg > MAX_HWIFS) checked in function */
1019 ide_unregister(arg, 1, 1);
1022 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1023 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
1025 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
1026 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
1027 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
1028 drive->dsc_overlap = 0;
1031 drive->nice1 = (arg >> IDE_NICE_1) & 1;
1033 case HDIO_DRIVE_RESET:
1035 unsigned long flags;
1036 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
1039 * Abort the current command on the
1040 * group if there is one, taking
1041 * care not to allow anything else
1042 * to be queued and to die on the
1043 * spot if we miss one somehow
1046 spin_lock_irqsave(&ide_lock, flags);
1048 if (HWGROUP(drive)->resetting) {
1049 spin_unlock_irqrestore(&ide_lock, flags);
1053 ide_abort(drive, "drive reset");
1055 BUG_ON(HWGROUP(drive)->handler);
1057 /* Ensure nothing gets queued after we
1058 drop the lock. Reset will clear the busy */
1060 HWGROUP(drive)->busy = 1;
1061 spin_unlock_irqrestore(&ide_lock, flags);
1062 (void) ide_do_reset(drive);
1067 case HDIO_GET_BUSSTATE:
1068 if (!capable(CAP_SYS_ADMIN))
1070 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
1074 case HDIO_SET_BUSSTATE:
1075 if (!capable(CAP_SYS_ADMIN))
1077 if (HWIF(drive)->busproc)
1078 return HWIF(drive)->busproc(drive, (int)arg);
1085 mutex_lock(&ide_setting_mtx);
1086 spin_lock_irqsave(&ide_lock, flags);
1088 spin_unlock_irqrestore(&ide_lock, flags);
1089 mutex_unlock(&ide_setting_mtx);
1090 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1093 if (bdev != bdev->bd_contains)
1096 if (!capable(CAP_SYS_ADMIN))
1099 mutex_lock(&ide_setting_mtx);
1100 err = setfunc(drive, arg);
1101 mutex_unlock(&ide_setting_mtx);
1107 EXPORT_SYMBOL(generic_ide_ioctl);
1110 * stridx() returns the offset of c within s,
1111 * or -1 if c is '\0' or not found within s.
1113 static int __init stridx (const char *s, char c)
1115 char *i = strchr(s, c);
1116 return (i && c) ? i - s : -1;
1120 * match_parm() does parsing for ide_setup():
1122 * 1. the first char of s must be '='.
1123 * 2. if the remainder matches one of the supplied keywords,
1124 * the index (1 based) of the keyword is negated and returned.
1125 * 3. if the remainder is a series of no more than max_vals numbers
1126 * separated by commas, the numbers are saved in vals[] and a
1127 * count of how many were saved is returned. Base10 is assumed,
1128 * and base16 is allowed when prefixed with "0x".
1129 * 4. otherwise, zero is returned.
1131 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
1133 static const char *decimal = "0123456789";
1134 static const char *hex = "0123456789abcdef";
1139 * Try matching against the supplied keywords,
1140 * and return -(index+1) if we match one
1142 if (keywords != NULL) {
1143 for (i = 0; *keywords != NULL; ++i) {
1144 if (!strcmp(s, *keywords++))
1149 * Look for a series of no more than "max_vals"
1150 * numeric values separated by commas, in base10,
1151 * or base16 when prefixed with "0x".
1152 * Return a count of how many were found.
1154 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
1156 while ((i = stridx(decimal, *++s)) >= 0)
1157 vals[n] = (vals[n] * 10) + i;
1158 if (*s == 'x' && !vals[n]) {
1159 while ((i = stridx(hex, *++s)) >= 0)
1160 vals[n] = (vals[n] * 0x10) + i;
1162 if (++n == max_vals)
1164 if (*s == ',' || *s == ';')
1170 return 0; /* zero = nothing matched */
1173 extern int probe_ali14xx;
1174 extern int probe_umc8672;
1175 extern int probe_dtc2278;
1176 extern int probe_ht6560b;
1177 extern int probe_qd65xx;
1178 extern int cmd640_vlb;
1180 static int __initdata is_chipset_set[MAX_HWIFS];
1183 * ide_setup() gets called VERY EARLY during initialization,
1184 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
1186 * Remember to update Documentation/ide.txt if you change something here.
1188 static int __init ide_setup(char *s)
1193 unsigned int hw, unit;
1194 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
1195 const char max_hwif = '0' + (MAX_HWIFS - 1);
1198 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
1199 return 0; /* driver and not us */
1201 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
1204 printk(KERN_INFO "ide_setup: %s", s);
1207 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
1208 if (!strcmp(s, "ide=doubler")) {
1209 extern int ide_doubler;
1211 printk(" : Enabled support for IDE doublers\n");
1215 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
1217 if (!strcmp(s, "ide=nodma")) {
1218 printk(" : Prevented DMA\n");
1220 goto obsolete_option;
1223 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1224 if (!strcmp(s, "ide=reverse")) {
1225 ide_scan_direction = 1;
1226 printk(" : Enabled support for IDE inverse scan order.\n");
1227 goto obsolete_option;
1231 #ifdef CONFIG_BLK_DEV_IDEACPI
1232 if (!strcmp(s, "ide=noacpi")) {
1233 //printk(" : Disable IDE ACPI support.\n");
1237 if (!strcmp(s, "ide=acpigtf")) {
1238 //printk(" : Enable IDE ACPI _GTF support.\n");
1242 if (!strcmp(s, "ide=acpionboot")) {
1243 //printk(" : Call IDE ACPI methods on boot.\n");
1244 ide_noacpionboot = 0;
1247 #endif /* CONFIG_BLK_DEV_IDEACPI */
1250 * Look for drive options: "hdx="
1252 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
1253 const char *hd_words[] = {
1254 "none", "noprobe", "nowerr", "cdrom", "nodma",
1255 "autotune", "noautotune", "-8", "-9", "-10",
1256 "noflush", "remap", "remap63", "scsi", NULL };
1258 hw = unit / MAX_DRIVES;
1259 unit = unit % MAX_DRIVES;
1260 hwif = &ide_hwifs[hw];
1261 drive = &hwif->drives[unit];
1262 if (strncmp(s + 4, "ide-", 4) == 0) {
1263 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
1266 switch (match_parm(&s[3], hd_words, vals, 3)) {
1267 case -1: /* "none" */
1268 case -2: /* "noprobe" */
1271 case -3: /* "nowerr" */
1272 drive->bad_wstat = BAD_R_STAT;
1275 case -4: /* "cdrom" */
1277 drive->media = ide_cdrom;
1278 /* an ATAPI device ignores DRDY */
1279 drive->ready_stat = 0;
1282 case -5: /* nodma */
1285 case -6: /* "autotune" */
1286 drive->autotune = IDE_TUNE_AUTO;
1287 goto obsolete_option;
1288 case -7: /* "noautotune" */
1289 drive->autotune = IDE_TUNE_NOAUTO;
1290 goto obsolete_option;
1291 case -11: /* noflush */
1294 case -12: /* "remap" */
1295 drive->remap_0_to_1 = 1;
1297 case -13: /* "remap63" */
1300 case -14: /* "scsi" */
1303 case 3: /* cyl,head,sect */
1304 drive->media = ide_disk;
1305 drive->ready_stat = READY_STAT;
1306 drive->cyl = drive->bios_cyl = vals[0];
1307 drive->head = drive->bios_head = vals[1];
1308 drive->sect = drive->bios_sect = vals[2];
1310 drive->forced_geom = 1;
1318 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
1321 * Look for bus speed option: "idebus="
1323 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
1324 if (match_parm(&s[6], NULL, vals, 1) != 1)
1326 if (vals[0] >= 20 && vals[0] <= 66) {
1327 idebus_parameter = vals[0];
1329 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
1333 * Look for interface options: "idex="
1335 if (s[3] >= '0' && s[3] <= max_hwif) {
1337 * Be VERY CAREFUL changing this: note hardcoded indexes below
1338 * (-8, -9, -10) are reserved to ease the hardcoding.
1340 static const char *ide_words[] = {
1341 "noprobe", "serialize", "minus3", "minus4",
1342 "reset", "minus6", "ata66", "minus8", "minus9",
1343 "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
1344 "dtc2278", "umc8672", "ali14xx", NULL };
1349 hwif = &ide_hwifs[hw];
1350 i = match_parm(&s[4], ide_words, vals, 3);
1353 * Cryptic check to ensure chipset not already set for hwif.
1354 * Note: we can't depend on hwif->chipset here.
1356 if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) {
1357 /* chipset already specified */
1358 if (is_chipset_set[hw])
1360 if (i > -18 && i <= -11) {
1361 /* these drivers are for "ide0=" only */
1364 /* chipset already specified for 2nd port */
1365 if (is_chipset_set[hw+1])
1368 is_chipset_set[hw] = 1;
1373 #ifdef CONFIG_BLK_DEV_ALI14XX
1374 case -17: /* "ali14xx" */
1378 #ifdef CONFIG_BLK_DEV_UMC8672
1379 case -16: /* "umc8672" */
1383 #ifdef CONFIG_BLK_DEV_DTC2278
1384 case -15: /* "dtc2278" */
1388 #ifdef CONFIG_BLK_DEV_CMD640
1389 case -14: /* "cmd640_vlb" */
1393 #ifdef CONFIG_BLK_DEV_HT6560B
1394 case -13: /* "ht6560b" */
1398 #ifdef CONFIG_BLK_DEV_QD65XX
1399 case -12: /* "qd65xx" */
1403 #ifdef CONFIG_BLK_DEV_4DRIVES
1404 case -11: /* "four" drives on one set of ports */
1406 ide_hwif_t *mate = &ide_hwifs[hw^1];
1407 mate->drives[0].select.all ^= 0x20;
1408 mate->drives[1].select.all ^= 0x20;
1409 hwif->chipset = mate->chipset = ide_4drives;
1410 mate->irq = hwif->irq;
1411 memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
1414 hwif->serialized = mate->serialized = 1;
1415 goto obsolete_option;
1417 #endif /* CONFIG_BLK_DEV_4DRIVES */
1418 case -10: /* minus10 */
1419 case -9: /* minus9 */
1420 case -8: /* minus8 */
1425 case -7: /* ata66 */
1426 #ifdef CONFIG_BLK_DEV_IDEPCI
1428 * Use ATA_CBL_PATA40_SHORT so drive side
1429 * cable detection is also overriden.
1431 hwif->cbl = ATA_CBL_PATA40_SHORT;
1432 goto obsolete_option;
1436 case -5: /* "reset" */
1438 goto obsolete_option;
1439 case -2: /* "serialize" */
1440 hwif->mate = &ide_hwifs[hw^1];
1441 hwif->mate->mate = hwif;
1442 hwif->serialized = hwif->mate->serialized = 1;
1443 goto obsolete_option;
1445 case -1: /* "noprobe" */
1447 goto obsolete_option;
1450 vals[1] = vals[0] + 0x206; /* default ctl */
1451 case 2: /* base,ctl */
1452 vals[2] = 0; /* default irq = probe for it */
1453 case 3: /* base,ctl,irq */
1454 memset(&hwregs, 0, sizeof(hwregs));
1455 ide_init_hwif_ports(&hwregs, vals[0], vals[1], &hwif->irq);
1456 memcpy(hwif->io_ports, hwregs.io_ports, sizeof(hwif->io_ports));
1457 hwif->irq = vals[2];
1459 hwif->chipset = ide_forced;
1460 goto obsolete_option;
1462 case 0: goto bad_option;
1464 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
1469 printk(" -- BAD OPTION\n");
1472 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
1475 printk("-- NOT SUPPORTED ON ide%d", hw);
1481 EXPORT_SYMBOL(ide_lock);
1483 static int ide_bus_match(struct device *dev, struct device_driver *drv)
1488 static char *media_string(ide_drive_t *drive)
1490 switch (drive->media) {
1506 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1508 ide_drive_t *drive = to_ide_device(dev);
1509 return sprintf(buf, "%s\n", media_string(drive));
1512 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1514 ide_drive_t *drive = to_ide_device(dev);
1515 return sprintf(buf, "%s\n", drive->name);
1518 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1520 ide_drive_t *drive = to_ide_device(dev);
1521 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1524 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1527 ide_drive_t *drive = to_ide_device(dev);
1528 return sprintf(buf, "%s\n", drive->id->model);
1531 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1534 ide_drive_t *drive = to_ide_device(dev);
1535 return sprintf(buf, "%s\n", drive->id->fw_rev);
1538 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1541 ide_drive_t *drive = to_ide_device(dev);
1542 return sprintf(buf, "%s\n", drive->id->serial_no);
1545 static struct device_attribute ide_dev_attrs[] = {
1547 __ATTR_RO(drivename),
1548 __ATTR_RO(modalias),
1550 __ATTR_RO(firmware),
1551 __ATTR(serial, 0400, serial_show, NULL),
1555 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1557 ide_drive_t *drive = to_ide_device(dev);
1559 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1560 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1561 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1565 static int generic_ide_probe(struct device *dev)
1567 ide_drive_t *drive = to_ide_device(dev);
1568 ide_driver_t *drv = to_ide_driver(dev->driver);
1570 return drv->probe ? drv->probe(drive) : -ENODEV;
1573 static int generic_ide_remove(struct device *dev)
1575 ide_drive_t *drive = to_ide_device(dev);
1576 ide_driver_t *drv = to_ide_driver(dev->driver);
1584 static void generic_ide_shutdown(struct device *dev)
1586 ide_drive_t *drive = to_ide_device(dev);
1587 ide_driver_t *drv = to_ide_driver(dev->driver);
1589 if (dev->driver && drv->shutdown)
1590 drv->shutdown(drive);
1593 struct bus_type ide_bus_type = {
1595 .match = ide_bus_match,
1596 .uevent = ide_uevent,
1597 .probe = generic_ide_probe,
1598 .remove = generic_ide_remove,
1599 .shutdown = generic_ide_shutdown,
1600 .dev_attrs = ide_dev_attrs,
1601 .suspend = generic_ide_suspend,
1602 .resume = generic_ide_resume,
1605 EXPORT_SYMBOL_GPL(ide_bus_type);
1608 * This is gets invoked once during initialization, to set *everything* up
1610 static int __init ide_init(void)
1614 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1615 system_bus_speed = ide_system_bus_speed();
1617 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1618 "for PIO modes%s\n", system_bus_speed,
1619 idebus_parameter ? "" : "; override with idebus=xx");
1621 ret = bus_register(&ide_bus_type);
1623 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1635 static char *options = NULL;
1636 module_param(options, charp, 0);
1637 MODULE_LICENSE("GPL");
1639 static void __init parse_options (char *line)
1643 if (line == NULL || !*line)
1645 while ((line = next) != NULL) {
1646 if ((next = strchr(line,' ')) != NULL)
1648 if (!ide_setup(line))
1649 printk (KERN_INFO "Unknown option '%s'\n", line);
1653 int __init init_module (void)
1655 parse_options(options);
1659 void __exit cleanup_module (void)
1663 for (index = 0; index < MAX_HWIFS; ++index)
1664 ide_unregister(index, 0, 0);
1668 bus_unregister(&ide_bus_type);
1673 __setup("", ide_setup);
1675 module_init(ide_init);