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 struct class *ide_port_class;
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84 IDE2_MAJOR, IDE3_MAJOR,
85 IDE4_MAJOR, IDE5_MAJOR,
86 IDE6_MAJOR, IDE7_MAJOR,
87 IDE8_MAJOR, IDE9_MAJOR };
89 static int idebus_parameter; /* holds the "idebus=" parameter */
90 static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
92 DEFINE_MUTEX(ide_cfg_mtx);
93 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
97 #ifdef CONFIG_BLK_DEV_IDEACPI
99 int ide_noacpitfs = 1;
100 int ide_noacpionboot = 1;
103 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
105 static void ide_port_init_devices_data(ide_hwif_t *);
108 * Do not even *think* about calling this!
110 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
112 /* bulk initialize hwif & drive info with zeros */
113 memset(hwif, 0, sizeof(ide_hwif_t));
115 /* fill in any non-zero initial values */
117 hwif->major = ide_hwif_to_major[index];
122 hwif->name[3] = '0' + index;
124 hwif->bus_state = BUSSTATE_ON;
126 init_completion(&hwif->gendev_rel_comp);
128 default_hwif_iops(hwif);
129 default_hwif_transport(hwif);
131 ide_port_init_devices_data(hwif);
133 EXPORT_SYMBOL_GPL(ide_init_port_data);
135 static void ide_port_init_devices_data(ide_hwif_t *hwif)
139 for (unit = 0; unit < MAX_DRIVES; ++unit) {
140 ide_drive_t *drive = &hwif->drives[unit];
141 u8 j = (hwif->index * MAX_DRIVES) + unit;
143 memset(drive, 0, sizeof(*drive));
145 drive->media = ide_disk;
146 drive->select.all = (unit<<4)|0xa0;
149 drive->ready_stat = READY_STAT;
150 drive->bad_wstat = BAD_W_STAT;
151 drive->special.b.recalibrate = 1;
152 drive->special.b.set_geometry = 1;
153 drive->name[0] = 'h';
154 drive->name[1] = 'd';
155 drive->name[2] = 'a' + j;
156 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
158 INIT_LIST_HEAD(&drive->list);
159 init_completion(&drive->gendev_rel_comp);
164 * init_ide_data() sets reasonable default values into all fields
165 * of all instances of the hwifs and drives, but only on the first call.
166 * Subsequent calls have no effect (they don't wipe out anything).
168 * This routine is normally called at driver initialization time,
169 * but may also be called MUCH earlier during kernel "command-line"
170 * parameter processing. As such, we cannot depend on any other parts
171 * of the kernel (such as memory allocation) to be functioning yet.
173 * This is too bad, as otherwise we could dynamically allocate the
174 * ide_drive_t structs as needed, rather than always consuming memory
175 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
177 * FIXME: We should stuff the setup data into __init and copy the
178 * relevant hwifs/allocate them properly during boot.
180 #define MAGIC_COOKIE 0x12345678
181 static void __init init_ide_data (void)
184 static unsigned long magic_cookie = MAGIC_COOKIE;
186 if (magic_cookie != MAGIC_COOKIE)
187 return; /* already initialized */
190 /* Initialise all interface structures */
191 for (index = 0; index < MAX_HWIFS; ++index) {
192 ide_hwif_t *hwif = &ide_hwifs[index];
194 ide_init_port_data(hwif, index);
199 * ide_system_bus_speed - guess bus speed
201 * ide_system_bus_speed() returns what we think is the system VESA/PCI
202 * bus speed (in MHz). This is used for calculating interface PIO timings.
203 * The default is 40 for known PCI systems, 50 otherwise.
204 * The "idebus=xx" parameter can be used to override this value.
205 * The actual value to be used is computed/displayed the first time
206 * through. Drivers should only use this as a last resort.
208 * Returns a guessed speed in MHz.
211 static int ide_system_bus_speed(void)
214 static struct pci_device_id pci_default[] = {
215 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
219 #define pci_default 0
220 #endif /* CONFIG_PCI */
222 /* user supplied value */
223 if (idebus_parameter)
224 return idebus_parameter;
226 /* safe default value for PCI or VESA and PCI*/
227 return pci_dev_present(pci_default) ? 33 : 50;
230 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
232 ide_hwgroup_t *hwgroup = hwif->hwgroup;
234 spin_lock_irq(&ide_lock);
236 * Remove us from the hwgroup, and free
237 * the hwgroup if we were the only member
239 if (hwif->next == hwif) {
240 BUG_ON(hwgroup->hwif != hwif);
243 /* There is another interface in hwgroup.
244 * Unlink us, and set hwgroup->drive and ->hwif to
247 ide_hwif_t *g = hwgroup->hwif;
249 while (g->next != hwif)
251 g->next = hwif->next;
252 if (hwgroup->hwif == hwif) {
253 /* Chose a random hwif for hwgroup->hwif.
254 * It's guaranteed that there are no drives
255 * left in the hwgroup.
257 BUG_ON(hwgroup->drive != NULL);
260 BUG_ON(hwgroup->hwif == hwif);
262 spin_unlock_irq(&ide_lock);
265 /* Called with ide_lock held. */
266 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
270 for (i = 0; i < MAX_DRIVES; i++) {
271 ide_drive_t *drive = &hwif->drives[i];
273 if (drive->present) {
274 spin_unlock_irq(&ide_lock);
275 device_unregister(&drive->gendev);
276 wait_for_completion(&drive->gendev_rel_comp);
277 spin_lock_irq(&ide_lock);
282 void ide_port_unregister_devices(ide_hwif_t *hwif)
284 mutex_lock(&ide_cfg_mtx);
285 spin_lock_irq(&ide_lock);
286 __ide_port_unregister_devices(hwif);
288 ide_port_init_devices_data(hwif);
289 spin_unlock_irq(&ide_lock);
290 mutex_unlock(&ide_cfg_mtx);
292 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
295 * ide_unregister - free an IDE interface
296 * @index: index of interface (will change soon to a pointer)
298 * Perform the final unregister of an IDE interface. At the moment
299 * we don't refcount interfaces so this will also get split up.
302 * The caller must not hold the IDE locks
303 * The drive present/vanishing is not yet properly locked
304 * Take care with the callbacks. These have been split to avoid
305 * deadlocking the IDE layer. The shutdown callback is called
306 * before we take the lock and free resources. It is up to the
307 * caller to be sure there is no pending I/O here, and that
308 * the interface will not be reopened (present/vanishing locking
309 * isn't yet done BTW). After we commit to the final kill we
310 * call the cleanup callback with the ide locks held.
312 * Unregister restores the hwif structures to the default state.
313 * This is raving bonkers.
316 void ide_unregister(unsigned int index)
318 ide_hwif_t *hwif, *g;
319 ide_hwgroup_t *hwgroup;
322 BUG_ON(index >= MAX_HWIFS);
324 BUG_ON(in_interrupt());
325 BUG_ON(irqs_disabled());
326 mutex_lock(&ide_cfg_mtx);
327 spin_lock_irq(&ide_lock);
328 hwif = &ide_hwifs[index];
331 __ide_port_unregister_devices(hwif);
334 spin_unlock_irq(&ide_lock);
336 ide_proc_unregister_port(hwif);
338 hwgroup = hwif->hwgroup;
340 * free the irq if we were the only hwif using it
344 if (g->irq == hwif->irq)
347 } while (g != hwgroup->hwif);
349 free_irq(hwif->irq, hwgroup);
351 ide_remove_port_from_hwgroup(hwif);
353 device_unregister(hwif->portdev);
354 device_unregister(&hwif->gendev);
355 wait_for_completion(&hwif->gendev_rel_comp);
358 * Remove us from the kernel's knowledge
360 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
361 kfree(hwif->sg_table);
362 unregister_blkdev(hwif->major, hwif->name);
363 spin_lock_irq(&ide_lock);
366 ide_release_dma_engine(hwif);
368 /* restore hwif data to pristine status */
369 ide_init_port_data(hwif, index);
372 spin_unlock_irq(&ide_lock);
373 mutex_unlock(&ide_cfg_mtx);
376 EXPORT_SYMBOL(ide_unregister);
378 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
380 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
382 hwif->chipset = hw->chipset;
383 hwif->gendev.parent = hw->dev;
384 hwif->ack_intr = hw->ack_intr;
386 EXPORT_SYMBOL_GPL(ide_init_port_hw);
389 * Locks for IDE setting functionality
392 DEFINE_MUTEX(ide_setting_mtx);
394 EXPORT_SYMBOL_GPL(ide_setting_mtx);
397 * ide_spin_wait_hwgroup - wait for group
398 * @drive: drive in the group
400 * Wait for an IDE device group to go non busy and then return
401 * holding the ide_lock which guards the hwgroup->busy status
402 * and right to use it.
405 int ide_spin_wait_hwgroup (ide_drive_t *drive)
407 ide_hwgroup_t *hwgroup = HWGROUP(drive);
408 unsigned long timeout = jiffies + (3 * HZ);
410 spin_lock_irq(&ide_lock);
412 while (hwgroup->busy) {
413 unsigned long lflags;
414 spin_unlock_irq(&ide_lock);
415 local_irq_set(lflags);
416 if (time_after(jiffies, timeout)) {
417 local_irq_restore(lflags);
418 printk(KERN_ERR "%s: channel busy\n", drive->name);
421 local_irq_restore(lflags);
422 spin_lock_irq(&ide_lock);
427 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
429 int set_io_32bit(ide_drive_t *drive, int arg)
431 if (drive->no_io_32bit)
434 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
437 if (ide_spin_wait_hwgroup(drive))
440 drive->io_32bit = arg;
442 spin_unlock_irq(&ide_lock);
447 static int set_ksettings(ide_drive_t *drive, int arg)
449 if (arg < 0 || arg > 1)
452 if (ide_spin_wait_hwgroup(drive))
454 drive->keep_settings = arg;
455 spin_unlock_irq(&ide_lock);
460 int set_using_dma(ide_drive_t *drive, int arg)
462 #ifdef CONFIG_BLK_DEV_IDEDMA
463 ide_hwif_t *hwif = drive->hwif;
466 if (arg < 0 || arg > 1)
469 if (!drive->id || !(drive->id->capability & 1))
472 if (hwif->dma_ops == NULL)
476 if (ide_spin_wait_hwgroup(drive))
479 * set ->busy flag, unlock and let it ride
481 hwif->hwgroup->busy = 1;
482 spin_unlock_irq(&ide_lock);
487 if (ide_set_dma(drive))
493 * lock, clear ->busy flag and unlock before leaving
495 spin_lock_irq(&ide_lock);
496 hwif->hwgroup->busy = 0;
497 spin_unlock_irq(&ide_lock);
501 if (arg < 0 || arg > 1)
508 int set_pio_mode(ide_drive_t *drive, int arg)
511 ide_hwif_t *hwif = drive->hwif;
512 const struct ide_port_ops *port_ops = hwif->port_ops;
514 if (arg < 0 || arg > 255)
517 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
518 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
521 if (drive->special.b.set_tune)
524 ide_init_drive_cmd(&rq);
525 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
527 drive->tune_req = (u8) arg;
528 drive->special.b.set_tune = 1;
529 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
533 static int set_unmaskirq(ide_drive_t *drive, int arg)
535 if (drive->no_unmask)
538 if (arg < 0 || arg > 1)
541 if (ide_spin_wait_hwgroup(drive))
544 spin_unlock_irq(&ide_lock);
550 * system_bus_clock - clock guess
552 * External version of the bus clock guess used by very old IDE drivers
553 * for things like VLB timings. Should not be used.
556 int system_bus_clock (void)
558 return system_bus_speed;
561 EXPORT_SYMBOL(system_bus_clock);
563 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
565 ide_drive_t *drive = dev->driver_data;
566 ide_hwif_t *hwif = HWIF(drive);
568 struct request_pm_state rqpm;
572 /* Call ACPI _GTM only once */
573 if (!(drive->dn % 2))
574 ide_acpi_get_timing(hwif);
576 memset(&rq, 0, sizeof(rq));
577 memset(&rqpm, 0, sizeof(rqpm));
578 memset(&args, 0, sizeof(args));
579 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
582 rqpm.pm_step = ide_pm_state_start_suspend;
583 if (mesg.event == PM_EVENT_PRETHAW)
584 mesg.event = PM_EVENT_FREEZE;
585 rqpm.pm_state = mesg.event;
587 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
588 /* only call ACPI _PS3 after both drivers are suspended */
589 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
590 && hwif->drives[1].present)
591 || !hwif->drives[0].present
592 || !hwif->drives[1].present))
593 ide_acpi_set_state(hwif, 0);
597 static int generic_ide_resume(struct device *dev)
599 ide_drive_t *drive = dev->driver_data;
600 ide_hwif_t *hwif = HWIF(drive);
602 struct request_pm_state rqpm;
606 /* Call ACPI _STM only once */
607 if (!(drive->dn % 2)) {
608 ide_acpi_set_state(hwif, 1);
609 ide_acpi_push_timing(hwif);
612 ide_acpi_exec_tfs(drive);
614 memset(&rq, 0, sizeof(rq));
615 memset(&rqpm, 0, sizeof(rqpm));
616 memset(&args, 0, sizeof(args));
617 rq.cmd_type = REQ_TYPE_PM_RESUME;
620 rqpm.pm_step = ide_pm_state_start_resume;
621 rqpm.pm_state = PM_EVENT_ON;
623 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
625 if (err == 0 && dev->driver) {
626 ide_driver_t *drv = to_ide_driver(dev->driver);
635 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
636 unsigned int cmd, unsigned long arg)
640 void __user *p = (void __user *)arg;
641 int err = 0, (*setfunc)(ide_drive_t *, int);
645 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
646 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
647 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
648 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
649 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
650 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
651 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
652 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
653 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
657 case HDIO_OBSOLETE_IDENTITY:
658 case HDIO_GET_IDENTITY:
659 if (bdev != bdev->bd_contains)
661 if (drive->id_read == 0)
663 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
668 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
669 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
670 drive->nice1 << IDE_NICE_1,
671 (long __user *) arg);
672 #ifdef CONFIG_IDE_TASK_IOCTL
673 case HDIO_DRIVE_TASKFILE:
674 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
676 switch(drive->media) {
678 return ide_taskfile_ioctl(drive, cmd, arg);
682 #endif /* CONFIG_IDE_TASK_IOCTL */
685 if (!capable(CAP_SYS_RAWIO))
687 return ide_cmd_ioctl(drive, cmd, arg);
689 case HDIO_DRIVE_TASK:
690 if (!capable(CAP_SYS_RAWIO))
692 return ide_task_ioctl(drive, cmd, arg);
694 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
695 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
697 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
698 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
699 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
700 drive->dsc_overlap = 0;
703 drive->nice1 = (arg >> IDE_NICE_1) & 1;
705 case HDIO_DRIVE_RESET:
706 if (!capable(CAP_SYS_ADMIN))
710 * Abort the current command on the
711 * group if there is one, taking
712 * care not to allow anything else
713 * to be queued and to die on the
714 * spot if we miss one somehow
717 spin_lock_irqsave(&ide_lock, flags);
719 if (HWGROUP(drive)->resetting) {
720 spin_unlock_irqrestore(&ide_lock, flags);
724 ide_abort(drive, "drive reset");
726 BUG_ON(HWGROUP(drive)->handler);
728 /* Ensure nothing gets queued after we
729 drop the lock. Reset will clear the busy */
731 HWGROUP(drive)->busy = 1;
732 spin_unlock_irqrestore(&ide_lock, flags);
733 (void) ide_do_reset(drive);
736 case HDIO_GET_BUSSTATE:
737 if (!capable(CAP_SYS_ADMIN))
739 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
743 case HDIO_SET_BUSSTATE:
744 if (!capable(CAP_SYS_ADMIN))
752 mutex_lock(&ide_setting_mtx);
753 spin_lock_irqsave(&ide_lock, flags);
755 spin_unlock_irqrestore(&ide_lock, flags);
756 mutex_unlock(&ide_setting_mtx);
757 return err >= 0 ? put_user(err, (long __user *)arg) : err;
760 if (bdev != bdev->bd_contains)
763 if (!capable(CAP_SYS_ADMIN))
766 mutex_lock(&ide_setting_mtx);
767 err = setfunc(drive, arg);
768 mutex_unlock(&ide_setting_mtx);
774 EXPORT_SYMBOL(generic_ide_ioctl);
777 * stridx() returns the offset of c within s,
778 * or -1 if c is '\0' or not found within s.
780 static int __init stridx (const char *s, char c)
782 char *i = strchr(s, c);
783 return (i && c) ? i - s : -1;
787 * match_parm() does parsing for ide_setup():
789 * 1. the first char of s must be '='.
790 * 2. if the remainder matches one of the supplied keywords,
791 * the index (1 based) of the keyword is negated and returned.
792 * 3. if the remainder is a series of no more than max_vals numbers
793 * separated by commas, the numbers are saved in vals[] and a
794 * count of how many were saved is returned. Base10 is assumed,
795 * and base16 is allowed when prefixed with "0x".
796 * 4. otherwise, zero is returned.
798 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
800 static const char *decimal = "0123456789";
801 static const char *hex = "0123456789abcdef";
806 * Try matching against the supplied keywords,
807 * and return -(index+1) if we match one
809 if (keywords != NULL) {
810 for (i = 0; *keywords != NULL; ++i) {
811 if (!strcmp(s, *keywords++))
816 * Look for a series of no more than "max_vals"
817 * numeric values separated by commas, in base10,
818 * or base16 when prefixed with "0x".
819 * Return a count of how many were found.
821 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
823 while ((i = stridx(decimal, *++s)) >= 0)
824 vals[n] = (vals[n] * 10) + i;
825 if (*s == 'x' && !vals[n]) {
826 while ((i = stridx(hex, *++s)) >= 0)
827 vals[n] = (vals[n] * 0x10) + i;
831 if (*s == ',' || *s == ';')
837 return 0; /* zero = nothing matched */
841 * ide_setup() gets called VERY EARLY during initialization,
842 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
844 * Remember to update Documentation/ide/ide.txt if you change something here.
846 static int __init ide_setup(char *s)
850 unsigned int hw, unit;
852 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
854 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
855 return 0; /* driver and not us */
857 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
860 printk(KERN_INFO "ide_setup: %s", s);
863 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
864 if (!strcmp(s, "ide=doubler")) {
865 extern int ide_doubler;
867 printk(" : Enabled support for IDE doublers\n");
871 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
873 if (!strcmp(s, "ide=nodma")) {
874 printk(" : Prevented DMA\n");
876 goto obsolete_option;
879 #ifdef CONFIG_BLK_DEV_IDEACPI
880 if (!strcmp(s, "ide=noacpi")) {
881 //printk(" : Disable IDE ACPI support.\n");
885 if (!strcmp(s, "ide=acpigtf")) {
886 //printk(" : Enable IDE ACPI _GTF support.\n");
890 if (!strcmp(s, "ide=acpionboot")) {
891 //printk(" : Call IDE ACPI methods on boot.\n");
892 ide_noacpionboot = 0;
895 #endif /* CONFIG_BLK_DEV_IDEACPI */
898 * Look for drive options: "hdx="
900 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
901 const char *hd_words[] = {
902 "none", "noprobe", "nowerr", "cdrom", "nodma",
903 "-6", "-7", "-8", "-9", "-10",
904 "noflush", "remap", "remap63", "scsi", NULL };
906 hw = unit / MAX_DRIVES;
907 unit = unit % MAX_DRIVES;
908 hwif = &ide_hwifs[hw];
909 drive = &hwif->drives[unit];
910 if (strncmp(s + 4, "ide-", 4) == 0) {
911 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
912 goto obsolete_option;
914 switch (match_parm(&s[3], hd_words, vals, 3)) {
915 case -1: /* "none" */
916 case -2: /* "noprobe" */
919 case -3: /* "nowerr" */
920 drive->bad_wstat = BAD_R_STAT;
922 case -4: /* "cdrom" */
924 drive->media = ide_cdrom;
925 /* an ATAPI device ignores DRDY */
926 drive->ready_stat = 0;
931 case -11: /* noflush */
934 case -12: /* "remap" */
935 drive->remap_0_to_1 = 1;
936 goto obsolete_option;
937 case -13: /* "remap63" */
939 goto obsolete_option;
940 case -14: /* "scsi" */
942 goto obsolete_option;
943 case 3: /* cyl,head,sect */
944 drive->media = ide_disk;
945 drive->ready_stat = READY_STAT;
946 drive->cyl = drive->bios_cyl = vals[0];
947 drive->head = drive->bios_head = vals[1];
948 drive->sect = drive->bios_sect = vals[2];
950 drive->forced_geom = 1;
957 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
960 * Look for bus speed option: "idebus="
962 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
963 if (match_parm(&s[6], NULL, vals, 1) != 1)
965 if (vals[0] >= 20 && vals[0] <= 66) {
966 idebus_parameter = vals[0];
968 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
969 goto obsolete_option;
973 printk(" -- BAD OPTION\n");
976 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
983 EXPORT_SYMBOL(ide_lock);
985 static int ide_bus_match(struct device *dev, struct device_driver *drv)
990 static char *media_string(ide_drive_t *drive)
992 switch (drive->media) {
1008 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1010 ide_drive_t *drive = to_ide_device(dev);
1011 return sprintf(buf, "%s\n", media_string(drive));
1014 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1016 ide_drive_t *drive = to_ide_device(dev);
1017 return sprintf(buf, "%s\n", drive->name);
1020 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1022 ide_drive_t *drive = to_ide_device(dev);
1023 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1026 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1029 ide_drive_t *drive = to_ide_device(dev);
1030 return sprintf(buf, "%s\n", drive->id->model);
1033 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1036 ide_drive_t *drive = to_ide_device(dev);
1037 return sprintf(buf, "%s\n", drive->id->fw_rev);
1040 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1043 ide_drive_t *drive = to_ide_device(dev);
1044 return sprintf(buf, "%s\n", drive->id->serial_no);
1047 static struct device_attribute ide_dev_attrs[] = {
1049 __ATTR_RO(drivename),
1050 __ATTR_RO(modalias),
1052 __ATTR_RO(firmware),
1053 __ATTR(serial, 0400, serial_show, NULL),
1057 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1059 ide_drive_t *drive = to_ide_device(dev);
1061 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1062 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1063 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1067 static int generic_ide_probe(struct device *dev)
1069 ide_drive_t *drive = to_ide_device(dev);
1070 ide_driver_t *drv = to_ide_driver(dev->driver);
1072 return drv->probe ? drv->probe(drive) : -ENODEV;
1075 static int generic_ide_remove(struct device *dev)
1077 ide_drive_t *drive = to_ide_device(dev);
1078 ide_driver_t *drv = to_ide_driver(dev->driver);
1086 static void generic_ide_shutdown(struct device *dev)
1088 ide_drive_t *drive = to_ide_device(dev);
1089 ide_driver_t *drv = to_ide_driver(dev->driver);
1091 if (dev->driver && drv->shutdown)
1092 drv->shutdown(drive);
1095 struct bus_type ide_bus_type = {
1097 .match = ide_bus_match,
1098 .uevent = ide_uevent,
1099 .probe = generic_ide_probe,
1100 .remove = generic_ide_remove,
1101 .shutdown = generic_ide_shutdown,
1102 .dev_attrs = ide_dev_attrs,
1103 .suspend = generic_ide_suspend,
1104 .resume = generic_ide_resume,
1107 EXPORT_SYMBOL_GPL(ide_bus_type);
1109 static void ide_port_class_release(struct device *portdev)
1111 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1113 put_device(&hwif->gendev);
1117 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1119 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1120 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1123 EXPORT_SYMBOL_GPL(ide_pci_clk);
1125 module_param_named(pci_clock, ide_pci_clk, int, 0);
1126 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1128 static unsigned int ide_ignore_cable;
1130 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1134 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1137 if (i >= MAX_HWIFS || j < 0 || j > 1)
1141 ide_ignore_cable |= (1 << i);
1143 ide_ignore_cable &= (1 << i);
1148 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1149 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1151 void ide_port_apply_params(ide_hwif_t *hwif)
1153 if (ide_ignore_cable & (1 << hwif->index)) {
1154 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1156 hwif->cbl = ATA_CBL_PATA40_SHORT;
1161 * This is gets invoked once during initialization, to set *everything* up
1163 static int __init ide_init(void)
1167 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1168 system_bus_speed = ide_system_bus_speed();
1170 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1171 "for PIO modes%s\n", system_bus_speed,
1172 idebus_parameter ? "" : "; override with idebus=xx");
1174 ret = bus_register(&ide_bus_type);
1176 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1180 ide_port_class = class_create(THIS_MODULE, "ide_port");
1181 if (IS_ERR(ide_port_class)) {
1182 ret = PTR_ERR(ide_port_class);
1183 goto out_port_class;
1185 ide_port_class->dev_release = ide_port_class_release;
1194 bus_unregister(&ide_bus_type);
1200 static char *options = NULL;
1201 module_param(options, charp, 0);
1202 MODULE_LICENSE("GPL");
1204 static void __init parse_options (char *line)
1208 if (line == NULL || !*line)
1210 while ((line = next) != NULL) {
1211 if ((next = strchr(line,' ')) != NULL)
1213 if (!ide_setup(line))
1214 printk (KERN_INFO "Unknown option '%s'\n", line);
1218 int __init init_module (void)
1220 parse_options(options);
1224 void __exit cleanup_module (void)
1228 for (index = 0; index < MAX_HWIFS; ++index)
1229 ide_unregister(index);
1233 class_destroy(ide_port_class);
1235 bus_unregister(&ide_bus_type);
1240 __setup("", ide_setup);
1242 module_init(ide_init);