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 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
99 static void ide_port_init_devices_data(ide_hwif_t *);
102 * Do not even *think* about calling this!
104 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
106 /* bulk initialize hwif & drive info with zeros */
107 memset(hwif, 0, sizeof(ide_hwif_t));
109 /* fill in any non-zero initial values */
111 hwif->major = ide_hwif_to_major[index];
116 hwif->name[3] = '0' + index;
118 hwif->bus_state = BUSSTATE_ON;
120 init_completion(&hwif->gendev_rel_comp);
122 default_hwif_iops(hwif);
123 default_hwif_transport(hwif);
125 ide_port_init_devices_data(hwif);
127 EXPORT_SYMBOL_GPL(ide_init_port_data);
129 static void ide_port_init_devices_data(ide_hwif_t *hwif)
133 for (unit = 0; unit < MAX_DRIVES; ++unit) {
134 ide_drive_t *drive = &hwif->drives[unit];
135 u8 j = (hwif->index * MAX_DRIVES) + unit;
137 memset(drive, 0, sizeof(*drive));
139 drive->media = ide_disk;
140 drive->select.all = (unit<<4)|0xa0;
143 drive->ready_stat = READY_STAT;
144 drive->bad_wstat = BAD_W_STAT;
145 drive->special.b.recalibrate = 1;
146 drive->special.b.set_geometry = 1;
147 drive->name[0] = 'h';
148 drive->name[1] = 'd';
149 drive->name[2] = 'a' + j;
150 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
152 INIT_LIST_HEAD(&drive->list);
153 init_completion(&drive->gendev_rel_comp);
158 * init_ide_data() sets reasonable default values into all fields
159 * of all instances of the hwifs and drives, but only on the first call.
160 * Subsequent calls have no effect (they don't wipe out anything).
162 * This routine is normally called at driver initialization time,
163 * but may also be called MUCH earlier during kernel "command-line"
164 * parameter processing. As such, we cannot depend on any other parts
165 * of the kernel (such as memory allocation) to be functioning yet.
167 * This is too bad, as otherwise we could dynamically allocate the
168 * ide_drive_t structs as needed, rather than always consuming memory
169 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
171 * FIXME: We should stuff the setup data into __init and copy the
172 * relevant hwifs/allocate them properly during boot.
174 #define MAGIC_COOKIE 0x12345678
175 static void __init init_ide_data (void)
178 static unsigned long magic_cookie = MAGIC_COOKIE;
180 if (magic_cookie != MAGIC_COOKIE)
181 return; /* already initialized */
184 /* Initialise all interface structures */
185 for (index = 0; index < MAX_HWIFS; ++index) {
186 ide_hwif_t *hwif = &ide_hwifs[index];
188 ide_init_port_data(hwif, index);
193 * ide_system_bus_speed - guess bus speed
195 * ide_system_bus_speed() returns what we think is the system VESA/PCI
196 * bus speed (in MHz). This is used for calculating interface PIO timings.
197 * The default is 40 for known PCI systems, 50 otherwise.
198 * The "idebus=xx" parameter can be used to override this value.
199 * The actual value to be used is computed/displayed the first time
200 * through. Drivers should only use this as a last resort.
202 * Returns a guessed speed in MHz.
205 static int ide_system_bus_speed(void)
208 static struct pci_device_id pci_default[] = {
209 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
213 #define pci_default 0
214 #endif /* CONFIG_PCI */
216 /* user supplied value */
217 if (idebus_parameter)
218 return idebus_parameter;
220 /* safe default value for PCI or VESA and PCI*/
221 return pci_dev_present(pci_default) ? 33 : 50;
224 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
226 ide_hwgroup_t *hwgroup = hwif->hwgroup;
228 spin_lock_irq(&ide_lock);
230 * Remove us from the hwgroup, and free
231 * the hwgroup if we were the only member
233 if (hwif->next == hwif) {
234 BUG_ON(hwgroup->hwif != hwif);
237 /* There is another interface in hwgroup.
238 * Unlink us, and set hwgroup->drive and ->hwif to
241 ide_hwif_t *g = hwgroup->hwif;
243 while (g->next != hwif)
245 g->next = hwif->next;
246 if (hwgroup->hwif == hwif) {
247 /* Chose a random hwif for hwgroup->hwif.
248 * It's guaranteed that there are no drives
249 * left in the hwgroup.
251 BUG_ON(hwgroup->drive != NULL);
254 BUG_ON(hwgroup->hwif == hwif);
256 spin_unlock_irq(&ide_lock);
259 /* Called with ide_lock held. */
260 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
264 for (i = 0; i < MAX_DRIVES; i++) {
265 ide_drive_t *drive = &hwif->drives[i];
267 if (drive->present) {
268 spin_unlock_irq(&ide_lock);
269 device_unregister(&drive->gendev);
270 wait_for_completion(&drive->gendev_rel_comp);
271 spin_lock_irq(&ide_lock);
276 void ide_port_unregister_devices(ide_hwif_t *hwif)
278 mutex_lock(&ide_cfg_mtx);
279 spin_lock_irq(&ide_lock);
280 __ide_port_unregister_devices(hwif);
282 ide_port_init_devices_data(hwif);
283 spin_unlock_irq(&ide_lock);
284 mutex_unlock(&ide_cfg_mtx);
286 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
289 * ide_unregister - free an IDE interface
290 * @index: index of interface (will change soon to a pointer)
292 * Perform the final unregister of an IDE interface. At the moment
293 * we don't refcount interfaces so this will also get split up.
296 * The caller must not hold the IDE locks
297 * The drive present/vanishing is not yet properly locked
298 * Take care with the callbacks. These have been split to avoid
299 * deadlocking the IDE layer. The shutdown callback is called
300 * before we take the lock and free resources. It is up to the
301 * caller to be sure there is no pending I/O here, and that
302 * the interface will not be reopened (present/vanishing locking
303 * isn't yet done BTW). After we commit to the final kill we
304 * call the cleanup callback with the ide locks held.
306 * Unregister restores the hwif structures to the default state.
307 * This is raving bonkers.
310 void ide_unregister(unsigned int index)
312 ide_hwif_t *hwif, *g;
313 ide_hwgroup_t *hwgroup;
316 BUG_ON(index >= MAX_HWIFS);
318 BUG_ON(in_interrupt());
319 BUG_ON(irqs_disabled());
320 mutex_lock(&ide_cfg_mtx);
321 spin_lock_irq(&ide_lock);
322 hwif = &ide_hwifs[index];
325 __ide_port_unregister_devices(hwif);
328 spin_unlock_irq(&ide_lock);
330 ide_proc_unregister_port(hwif);
332 hwgroup = hwif->hwgroup;
334 * free the irq if we were the only hwif using it
338 if (g->irq == hwif->irq)
341 } while (g != hwgroup->hwif);
343 free_irq(hwif->irq, hwgroup);
345 ide_remove_port_from_hwgroup(hwif);
347 device_unregister(hwif->portdev);
348 device_unregister(&hwif->gendev);
349 wait_for_completion(&hwif->gendev_rel_comp);
352 * Remove us from the kernel's knowledge
354 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
355 kfree(hwif->sg_table);
356 unregister_blkdev(hwif->major, hwif->name);
357 spin_lock_irq(&ide_lock);
360 ide_release_dma_engine(hwif);
362 /* restore hwif data to pristine status */
363 ide_init_port_data(hwif, index);
366 spin_unlock_irq(&ide_lock);
367 mutex_unlock(&ide_cfg_mtx);
370 EXPORT_SYMBOL(ide_unregister);
372 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
374 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
376 hwif->chipset = hw->chipset;
377 hwif->gendev.parent = hw->dev;
378 hwif->ack_intr = hw->ack_intr;
380 EXPORT_SYMBOL_GPL(ide_init_port_hw);
383 * Locks for IDE setting functionality
386 DEFINE_MUTEX(ide_setting_mtx);
388 EXPORT_SYMBOL_GPL(ide_setting_mtx);
391 * ide_spin_wait_hwgroup - wait for group
392 * @drive: drive in the group
394 * Wait for an IDE device group to go non busy and then return
395 * holding the ide_lock which guards the hwgroup->busy status
396 * and right to use it.
399 int ide_spin_wait_hwgroup (ide_drive_t *drive)
401 ide_hwgroup_t *hwgroup = HWGROUP(drive);
402 unsigned long timeout = jiffies + (3 * HZ);
404 spin_lock_irq(&ide_lock);
406 while (hwgroup->busy) {
407 unsigned long lflags;
408 spin_unlock_irq(&ide_lock);
409 local_irq_set(lflags);
410 if (time_after(jiffies, timeout)) {
411 local_irq_restore(lflags);
412 printk(KERN_ERR "%s: channel busy\n", drive->name);
415 local_irq_restore(lflags);
416 spin_lock_irq(&ide_lock);
421 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
423 int set_io_32bit(ide_drive_t *drive, int arg)
425 if (drive->no_io_32bit)
428 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
431 if (ide_spin_wait_hwgroup(drive))
434 drive->io_32bit = arg;
436 spin_unlock_irq(&ide_lock);
441 static int set_ksettings(ide_drive_t *drive, int arg)
443 if (arg < 0 || arg > 1)
446 if (ide_spin_wait_hwgroup(drive))
448 drive->keep_settings = arg;
449 spin_unlock_irq(&ide_lock);
454 int set_using_dma(ide_drive_t *drive, int arg)
456 #ifdef CONFIG_BLK_DEV_IDEDMA
457 ide_hwif_t *hwif = drive->hwif;
460 if (arg < 0 || arg > 1)
463 if (!drive->id || !(drive->id->capability & 1))
466 if (hwif->dma_ops == NULL)
470 if (ide_spin_wait_hwgroup(drive))
473 * set ->busy flag, unlock and let it ride
475 hwif->hwgroup->busy = 1;
476 spin_unlock_irq(&ide_lock);
481 if (ide_set_dma(drive))
487 * lock, clear ->busy flag and unlock before leaving
489 spin_lock_irq(&ide_lock);
490 hwif->hwgroup->busy = 0;
491 spin_unlock_irq(&ide_lock);
495 if (arg < 0 || arg > 1)
502 int set_pio_mode(ide_drive_t *drive, int arg)
505 ide_hwif_t *hwif = drive->hwif;
506 const struct ide_port_ops *port_ops = hwif->port_ops;
508 if (arg < 0 || arg > 255)
511 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
512 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
515 if (drive->special.b.set_tune)
518 ide_init_drive_cmd(&rq);
519 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
521 drive->tune_req = (u8) arg;
522 drive->special.b.set_tune = 1;
523 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
527 static int set_unmaskirq(ide_drive_t *drive, int arg)
529 if (drive->no_unmask)
532 if (arg < 0 || arg > 1)
535 if (ide_spin_wait_hwgroup(drive))
538 spin_unlock_irq(&ide_lock);
544 * system_bus_clock - clock guess
546 * External version of the bus clock guess used by very old IDE drivers
547 * for things like VLB timings. Should not be used.
550 int system_bus_clock (void)
552 return system_bus_speed;
555 EXPORT_SYMBOL(system_bus_clock);
557 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
559 ide_drive_t *drive = dev->driver_data;
560 ide_hwif_t *hwif = HWIF(drive);
562 struct request_pm_state rqpm;
566 /* Call ACPI _GTM only once */
567 if (!(drive->dn % 2))
568 ide_acpi_get_timing(hwif);
570 memset(&rq, 0, sizeof(rq));
571 memset(&rqpm, 0, sizeof(rqpm));
572 memset(&args, 0, sizeof(args));
573 rq.cmd_type = REQ_TYPE_PM_SUSPEND;
576 rqpm.pm_step = ide_pm_state_start_suspend;
577 if (mesg.event == PM_EVENT_PRETHAW)
578 mesg.event = PM_EVENT_FREEZE;
579 rqpm.pm_state = mesg.event;
581 ret = ide_do_drive_cmd(drive, &rq, ide_wait);
582 /* only call ACPI _PS3 after both drivers are suspended */
583 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
584 && hwif->drives[1].present)
585 || !hwif->drives[0].present
586 || !hwif->drives[1].present))
587 ide_acpi_set_state(hwif, 0);
591 static int generic_ide_resume(struct device *dev)
593 ide_drive_t *drive = dev->driver_data;
594 ide_hwif_t *hwif = HWIF(drive);
596 struct request_pm_state rqpm;
600 /* Call ACPI _STM only once */
601 if (!(drive->dn % 2)) {
602 ide_acpi_set_state(hwif, 1);
603 ide_acpi_push_timing(hwif);
606 ide_acpi_exec_tfs(drive);
608 memset(&rq, 0, sizeof(rq));
609 memset(&rqpm, 0, sizeof(rqpm));
610 memset(&args, 0, sizeof(args));
611 rq.cmd_type = REQ_TYPE_PM_RESUME;
614 rqpm.pm_step = ide_pm_state_start_resume;
615 rqpm.pm_state = PM_EVENT_ON;
617 err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
619 if (err == 0 && dev->driver) {
620 ide_driver_t *drv = to_ide_driver(dev->driver);
629 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
630 unsigned int cmd, unsigned long arg)
634 void __user *p = (void __user *)arg;
635 int err = 0, (*setfunc)(ide_drive_t *, int);
639 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
640 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
641 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
642 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
643 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
644 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
645 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
646 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
647 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
651 case HDIO_OBSOLETE_IDENTITY:
652 case HDIO_GET_IDENTITY:
653 if (bdev != bdev->bd_contains)
655 if (drive->id_read == 0)
657 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
662 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
663 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
664 drive->nice1 << IDE_NICE_1,
665 (long __user *) arg);
666 #ifdef CONFIG_IDE_TASK_IOCTL
667 case HDIO_DRIVE_TASKFILE:
668 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
670 switch(drive->media) {
672 return ide_taskfile_ioctl(drive, cmd, arg);
676 #endif /* CONFIG_IDE_TASK_IOCTL */
679 if (!capable(CAP_SYS_RAWIO))
681 return ide_cmd_ioctl(drive, cmd, arg);
683 case HDIO_DRIVE_TASK:
684 if (!capable(CAP_SYS_RAWIO))
686 return ide_task_ioctl(drive, cmd, arg);
688 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
689 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
691 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
692 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
693 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
694 drive->dsc_overlap = 0;
697 drive->nice1 = (arg >> IDE_NICE_1) & 1;
699 case HDIO_DRIVE_RESET:
700 if (!capable(CAP_SYS_ADMIN))
704 * Abort the current command on the
705 * group if there is one, taking
706 * care not to allow anything else
707 * to be queued and to die on the
708 * spot if we miss one somehow
711 spin_lock_irqsave(&ide_lock, flags);
713 if (HWGROUP(drive)->resetting) {
714 spin_unlock_irqrestore(&ide_lock, flags);
718 ide_abort(drive, "drive reset");
720 BUG_ON(HWGROUP(drive)->handler);
722 /* Ensure nothing gets queued after we
723 drop the lock. Reset will clear the busy */
725 HWGROUP(drive)->busy = 1;
726 spin_unlock_irqrestore(&ide_lock, flags);
727 (void) ide_do_reset(drive);
730 case HDIO_GET_BUSSTATE:
731 if (!capable(CAP_SYS_ADMIN))
733 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
737 case HDIO_SET_BUSSTATE:
738 if (!capable(CAP_SYS_ADMIN))
746 mutex_lock(&ide_setting_mtx);
747 spin_lock_irqsave(&ide_lock, flags);
749 spin_unlock_irqrestore(&ide_lock, flags);
750 mutex_unlock(&ide_setting_mtx);
751 return err >= 0 ? put_user(err, (long __user *)arg) : err;
754 if (bdev != bdev->bd_contains)
757 if (!capable(CAP_SYS_ADMIN))
760 mutex_lock(&ide_setting_mtx);
761 err = setfunc(drive, arg);
762 mutex_unlock(&ide_setting_mtx);
768 EXPORT_SYMBOL(generic_ide_ioctl);
771 * stridx() returns the offset of c within s,
772 * or -1 if c is '\0' or not found within s.
774 static int __init stridx (const char *s, char c)
776 char *i = strchr(s, c);
777 return (i && c) ? i - s : -1;
781 * match_parm() does parsing for ide_setup():
783 * 1. the first char of s must be '='.
784 * 2. if the remainder matches one of the supplied keywords,
785 * the index (1 based) of the keyword is negated and returned.
786 * 3. if the remainder is a series of no more than max_vals numbers
787 * separated by commas, the numbers are saved in vals[] and a
788 * count of how many were saved is returned. Base10 is assumed,
789 * and base16 is allowed when prefixed with "0x".
790 * 4. otherwise, zero is returned.
792 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
794 static const char *decimal = "0123456789";
795 static const char *hex = "0123456789abcdef";
800 * Try matching against the supplied keywords,
801 * and return -(index+1) if we match one
803 if (keywords != NULL) {
804 for (i = 0; *keywords != NULL; ++i) {
805 if (!strcmp(s, *keywords++))
810 * Look for a series of no more than "max_vals"
811 * numeric values separated by commas, in base10,
812 * or base16 when prefixed with "0x".
813 * Return a count of how many were found.
815 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
817 while ((i = stridx(decimal, *++s)) >= 0)
818 vals[n] = (vals[n] * 10) + i;
819 if (*s == 'x' && !vals[n]) {
820 while ((i = stridx(hex, *++s)) >= 0)
821 vals[n] = (vals[n] * 0x10) + i;
825 if (*s == ',' || *s == ';')
831 return 0; /* zero = nothing matched */
835 * ide_setup() gets called VERY EARLY during initialization,
836 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
838 * Remember to update Documentation/ide/ide.txt if you change something here.
840 static int __init ide_setup(char *s)
844 unsigned int hw, unit;
846 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
848 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
849 return 0; /* driver and not us */
851 if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
854 printk(KERN_INFO "ide_setup: %s", s);
857 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
858 if (!strcmp(s, "ide=doubler")) {
859 extern int ide_doubler;
861 printk(" : Enabled support for IDE doublers\n");
863 goto obsolete_option;
865 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
867 if (!strcmp(s, "ide=nodma")) {
868 printk(" : Prevented DMA\n");
870 goto obsolete_option;
873 #ifdef CONFIG_BLK_DEV_IDEACPI
874 if (!strcmp(s, "ide=noacpi")) {
875 //printk(" : Disable IDE ACPI support.\n");
877 goto obsolete_option;
879 if (!strcmp(s, "ide=acpigtf")) {
880 //printk(" : Enable IDE ACPI _GTF support.\n");
882 goto obsolete_option;
884 if (!strcmp(s, "ide=acpionboot")) {
885 //printk(" : Call IDE ACPI methods on boot.\n");
887 goto obsolete_option;
889 #endif /* CONFIG_BLK_DEV_IDEACPI */
892 * Look for drive options: "hdx="
894 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
895 const char *hd_words[] = {
896 "none", "noprobe", "nowerr", "cdrom", "nodma",
897 "-6", "-7", "-8", "-9", "-10",
898 "noflush", "remap", "remap63", "scsi", NULL };
900 hw = unit / MAX_DRIVES;
901 unit = unit % MAX_DRIVES;
902 hwif = &ide_hwifs[hw];
903 drive = &hwif->drives[unit];
904 if (strncmp(s + 4, "ide-", 4) == 0) {
905 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
906 goto obsolete_option;
908 switch (match_parm(&s[3], hd_words, vals, 3)) {
909 case -1: /* "none" */
910 case -2: /* "noprobe" */
912 goto obsolete_option;
913 case -3: /* "nowerr" */
914 drive->bad_wstat = BAD_R_STAT;
915 goto obsolete_option;
916 case -4: /* "cdrom" */
918 drive->media = ide_cdrom;
919 /* an ATAPI device ignores DRDY */
920 drive->ready_stat = 0;
921 goto obsolete_option;
924 goto obsolete_option;
925 case -11: /* noflush */
927 goto obsolete_option;
928 case -12: /* "remap" */
929 drive->remap_0_to_1 = 1;
930 goto obsolete_option;
931 case -13: /* "remap63" */
933 goto obsolete_option;
934 case -14: /* "scsi" */
936 goto obsolete_option;
937 case 3: /* cyl,head,sect */
938 drive->media = ide_disk;
939 drive->ready_stat = READY_STAT;
940 drive->cyl = drive->bios_cyl = vals[0];
941 drive->head = drive->bios_head = vals[1];
942 drive->sect = drive->bios_sect = vals[2];
944 drive->forced_geom = 1;
945 goto obsolete_option;
951 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
954 * Look for bus speed option: "idebus="
956 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
957 if (match_parm(&s[6], NULL, vals, 1) != 1)
959 if (vals[0] >= 20 && vals[0] <= 66) {
960 idebus_parameter = vals[0];
962 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
963 goto obsolete_option;
967 printk(" -- BAD OPTION\n");
970 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
974 EXPORT_SYMBOL(ide_lock);
976 static int ide_bus_match(struct device *dev, struct device_driver *drv)
981 static char *media_string(ide_drive_t *drive)
983 switch (drive->media) {
999 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
1001 ide_drive_t *drive = to_ide_device(dev);
1002 return sprintf(buf, "%s\n", media_string(drive));
1005 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1007 ide_drive_t *drive = to_ide_device(dev);
1008 return sprintf(buf, "%s\n", drive->name);
1011 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1013 ide_drive_t *drive = to_ide_device(dev);
1014 return sprintf(buf, "ide:m-%s\n", media_string(drive));
1017 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1020 ide_drive_t *drive = to_ide_device(dev);
1021 return sprintf(buf, "%s\n", drive->id->model);
1024 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1027 ide_drive_t *drive = to_ide_device(dev);
1028 return sprintf(buf, "%s\n", drive->id->fw_rev);
1031 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1034 ide_drive_t *drive = to_ide_device(dev);
1035 return sprintf(buf, "%s\n", drive->id->serial_no);
1038 static struct device_attribute ide_dev_attrs[] = {
1040 __ATTR_RO(drivename),
1041 __ATTR_RO(modalias),
1043 __ATTR_RO(firmware),
1044 __ATTR(serial, 0400, serial_show, NULL),
1048 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1050 ide_drive_t *drive = to_ide_device(dev);
1052 add_uevent_var(env, "MEDIA=%s", media_string(drive));
1053 add_uevent_var(env, "DRIVENAME=%s", drive->name);
1054 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1058 static int generic_ide_probe(struct device *dev)
1060 ide_drive_t *drive = to_ide_device(dev);
1061 ide_driver_t *drv = to_ide_driver(dev->driver);
1063 return drv->probe ? drv->probe(drive) : -ENODEV;
1066 static int generic_ide_remove(struct device *dev)
1068 ide_drive_t *drive = to_ide_device(dev);
1069 ide_driver_t *drv = to_ide_driver(dev->driver);
1077 static void generic_ide_shutdown(struct device *dev)
1079 ide_drive_t *drive = to_ide_device(dev);
1080 ide_driver_t *drv = to_ide_driver(dev->driver);
1082 if (dev->driver && drv->shutdown)
1083 drv->shutdown(drive);
1086 struct bus_type ide_bus_type = {
1088 .match = ide_bus_match,
1089 .uevent = ide_uevent,
1090 .probe = generic_ide_probe,
1091 .remove = generic_ide_remove,
1092 .shutdown = generic_ide_shutdown,
1093 .dev_attrs = ide_dev_attrs,
1094 .suspend = generic_ide_suspend,
1095 .resume = generic_ide_resume,
1098 EXPORT_SYMBOL_GPL(ide_bus_type);
1100 static void ide_port_class_release(struct device *portdev)
1102 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1104 put_device(&hwif->gendev);
1108 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1110 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1111 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1114 EXPORT_SYMBOL_GPL(ide_pci_clk);
1116 module_param_named(pci_clock, ide_pci_clk, int, 0);
1117 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1119 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1122 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1124 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1125 sscanf(s, "%d.%d", &a, &b) != 2)
1128 i = a * MAX_DRIVES + b;
1130 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1134 *dev_param_mask |= (1 << i);
1136 *dev_param_mask &= (1 << i);
1141 static unsigned int ide_nodma;
1143 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1144 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1146 static unsigned int ide_noflush;
1148 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1149 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1151 static unsigned int ide_noprobe;
1153 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1154 MODULE_PARM_DESC(noprobe, "skip probing for a device");
1156 static unsigned int ide_nowerr;
1158 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1159 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1161 static unsigned int ide_cdroms;
1163 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1164 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1172 static unsigned int ide_disks;
1173 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1175 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1177 int a, b, c = 0, h = 0, s = 0, i, j = 1;
1179 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1180 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1183 i = a * MAX_DRIVES + b;
1185 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1188 if (c > INT_MAX || h > 255 || s > 255)
1192 ide_disks |= (1 << i);
1194 ide_disks &= (1 << i);
1196 ide_disks_chs[i].cyl = c;
1197 ide_disks_chs[i].head = h;
1198 ide_disks_chs[i].sect = s;
1203 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1204 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1206 static void ide_dev_apply_params(ide_drive_t *drive)
1208 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1210 if (ide_nodma & (1 << i)) {
1211 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1214 if (ide_noflush & (1 << i)) {
1215 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1219 if (ide_noprobe & (1 << i)) {
1220 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1223 if (ide_nowerr & (1 << i)) {
1224 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1226 drive->bad_wstat = BAD_R_STAT;
1228 if (ide_cdroms & (1 << i)) {
1229 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1231 drive->media = ide_cdrom;
1232 /* an ATAPI device ignores DRDY */
1233 drive->ready_stat = 0;
1235 if (ide_disks & (1 << i)) {
1236 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
1237 drive->head = drive->bios_head = ide_disks_chs[i].head;
1238 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1239 drive->forced_geom = 1;
1240 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1242 drive->cyl, drive->head, drive->sect);
1244 drive->media = ide_disk;
1245 drive->ready_stat = READY_STAT;
1249 static unsigned int ide_ignore_cable;
1251 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1255 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1258 if (i >= MAX_HWIFS || j < 0 || j > 1)
1262 ide_ignore_cable |= (1 << i);
1264 ide_ignore_cable &= (1 << i);
1269 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1270 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1272 void ide_port_apply_params(ide_hwif_t *hwif)
1276 if (ide_ignore_cable & (1 << hwif->index)) {
1277 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1279 hwif->cbl = ATA_CBL_PATA40_SHORT;
1282 for (i = 0; i < MAX_DRIVES; i++)
1283 ide_dev_apply_params(&hwif->drives[i]);
1287 * This is gets invoked once during initialization, to set *everything* up
1289 static int __init ide_init(void)
1293 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1294 system_bus_speed = ide_system_bus_speed();
1296 printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1297 "for PIO modes%s\n", system_bus_speed,
1298 idebus_parameter ? "" : "; override with idebus=xx");
1300 ret = bus_register(&ide_bus_type);
1302 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1306 ide_port_class = class_create(THIS_MODULE, "ide_port");
1307 if (IS_ERR(ide_port_class)) {
1308 ret = PTR_ERR(ide_port_class);
1309 goto out_port_class;
1311 ide_port_class->dev_release = ide_port_class_release;
1320 bus_unregister(&ide_bus_type);
1326 static char *options = NULL;
1327 module_param(options, charp, 0);
1328 MODULE_LICENSE("GPL");
1330 static void __init parse_options (char *line)
1334 if (line == NULL || !*line)
1336 while ((line = next) != NULL) {
1337 if ((next = strchr(line,' ')) != NULL)
1339 if (!ide_setup(line))
1340 printk (KERN_INFO "Unknown option '%s'\n", line);
1344 int __init init_module (void)
1346 parse_options(options);
1350 void __exit cleanup_module (void)
1354 class_destroy(ide_port_class);
1356 bus_unregister(&ide_bus_type);
1361 __setup("", ide_setup);
1363 module_init(ide_init);