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 DEFINE_MUTEX(ide_cfg_mtx);
90 __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94 ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
96 static void ide_port_init_devices_data(ide_hwif_t *);
99 * Do not even *think* about calling this!
101 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
103 /* bulk initialize hwif & drive info with zeros */
104 memset(hwif, 0, sizeof(ide_hwif_t));
106 /* fill in any non-zero initial values */
108 hwif->major = ide_hwif_to_major[index];
113 hwif->name[3] = '0' + index;
115 hwif->bus_state = BUSSTATE_ON;
117 init_completion(&hwif->gendev_rel_comp);
119 default_hwif_iops(hwif);
120 default_hwif_transport(hwif);
122 ide_port_init_devices_data(hwif);
124 EXPORT_SYMBOL_GPL(ide_init_port_data);
126 static void ide_port_init_devices_data(ide_hwif_t *hwif)
130 for (unit = 0; unit < MAX_DRIVES; ++unit) {
131 ide_drive_t *drive = &hwif->drives[unit];
132 u8 j = (hwif->index * MAX_DRIVES) + unit;
134 memset(drive, 0, sizeof(*drive));
136 drive->media = ide_disk;
137 drive->select.all = (unit<<4)|0xa0;
140 drive->ready_stat = READY_STAT;
141 drive->bad_wstat = BAD_W_STAT;
142 drive->special.b.recalibrate = 1;
143 drive->special.b.set_geometry = 1;
144 drive->name[0] = 'h';
145 drive->name[1] = 'd';
146 drive->name[2] = 'a' + j;
147 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
149 INIT_LIST_HEAD(&drive->list);
150 init_completion(&drive->gendev_rel_comp);
155 * init_ide_data() sets reasonable default values into all fields
156 * of all instances of the hwifs and drives, but only on the first call.
157 * Subsequent calls have no effect (they don't wipe out anything).
159 * This routine is normally called at driver initialization time,
160 * but may also be called MUCH earlier during kernel "command-line"
161 * parameter processing. As such, we cannot depend on any other parts
162 * of the kernel (such as memory allocation) to be functioning yet.
164 * This is too bad, as otherwise we could dynamically allocate the
165 * ide_drive_t structs as needed, rather than always consuming memory
166 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
168 * FIXME: We should stuff the setup data into __init and copy the
169 * relevant hwifs/allocate them properly during boot.
171 #define MAGIC_COOKIE 0x12345678
172 static void __init init_ide_data (void)
175 static unsigned long magic_cookie = MAGIC_COOKIE;
177 if (magic_cookie != MAGIC_COOKIE)
178 return; /* already initialized */
181 /* Initialise all interface structures */
182 for (index = 0; index < MAX_HWIFS; ++index) {
183 ide_hwif_t *hwif = &ide_hwifs[index];
185 ide_init_port_data(hwif, index);
189 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
191 ide_hwgroup_t *hwgroup = hwif->hwgroup;
193 spin_lock_irq(&ide_lock);
195 * Remove us from the hwgroup, and free
196 * the hwgroup if we were the only member
198 if (hwif->next == hwif) {
199 BUG_ON(hwgroup->hwif != hwif);
202 /* There is another interface in hwgroup.
203 * Unlink us, and set hwgroup->drive and ->hwif to
206 ide_hwif_t *g = hwgroup->hwif;
208 while (g->next != hwif)
210 g->next = hwif->next;
211 if (hwgroup->hwif == hwif) {
212 /* Chose a random hwif for hwgroup->hwif.
213 * It's guaranteed that there are no drives
214 * left in the hwgroup.
216 BUG_ON(hwgroup->drive != NULL);
219 BUG_ON(hwgroup->hwif == hwif);
221 spin_unlock_irq(&ide_lock);
224 /* Called with ide_lock held. */
225 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
229 for (i = 0; i < MAX_DRIVES; i++) {
230 ide_drive_t *drive = &hwif->drives[i];
232 if (drive->present) {
233 spin_unlock_irq(&ide_lock);
234 device_unregister(&drive->gendev);
235 wait_for_completion(&drive->gendev_rel_comp);
236 spin_lock_irq(&ide_lock);
241 void ide_port_unregister_devices(ide_hwif_t *hwif)
243 mutex_lock(&ide_cfg_mtx);
244 spin_lock_irq(&ide_lock);
245 __ide_port_unregister_devices(hwif);
247 ide_port_init_devices_data(hwif);
248 spin_unlock_irq(&ide_lock);
249 mutex_unlock(&ide_cfg_mtx);
251 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
254 * ide_unregister - free an IDE interface
255 * @hwif: IDE interface
257 * Perform the final unregister of an IDE interface. At the moment
258 * we don't refcount interfaces so this will also get split up.
261 * The caller must not hold the IDE locks
262 * The drive present/vanishing is not yet properly locked
263 * Take care with the callbacks. These have been split to avoid
264 * deadlocking the IDE layer. The shutdown callback is called
265 * before we take the lock and free resources. It is up to the
266 * caller to be sure there is no pending I/O here, and that
267 * the interface will not be reopened (present/vanishing locking
268 * isn't yet done BTW). After we commit to the final kill we
269 * call the cleanup callback with the ide locks held.
271 * Unregister restores the hwif structures to the default state.
272 * This is raving bonkers.
275 void ide_unregister(ide_hwif_t *hwif)
278 ide_hwgroup_t *hwgroup;
281 BUG_ON(in_interrupt());
282 BUG_ON(irqs_disabled());
284 mutex_lock(&ide_cfg_mtx);
286 spin_lock_irq(&ide_lock);
288 __ide_port_unregister_devices(hwif);
291 spin_unlock_irq(&ide_lock);
293 ide_proc_unregister_port(hwif);
295 hwgroup = hwif->hwgroup;
297 * free the irq if we were the only hwif using it
301 if (g->irq == hwif->irq)
304 } while (g != hwgroup->hwif);
306 free_irq(hwif->irq, hwgroup);
308 ide_remove_port_from_hwgroup(hwif);
310 device_unregister(hwif->portdev);
311 device_unregister(&hwif->gendev);
312 wait_for_completion(&hwif->gendev_rel_comp);
315 * Remove us from the kernel's knowledge
317 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
318 kfree(hwif->sg_table);
319 unregister_blkdev(hwif->major, hwif->name);
322 ide_release_dma_engine(hwif);
324 spin_lock_irq(&ide_lock);
325 /* restore hwif data to pristine status */
326 ide_init_port_data(hwif, hwif->index);
327 spin_unlock_irq(&ide_lock);
329 mutex_unlock(&ide_cfg_mtx);
332 EXPORT_SYMBOL(ide_unregister);
334 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
336 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
338 hwif->chipset = hw->chipset;
339 hwif->gendev.parent = hw->dev;
340 hwif->ack_intr = hw->ack_intr;
342 EXPORT_SYMBOL_GPL(ide_init_port_hw);
345 * Locks for IDE setting functionality
348 DEFINE_MUTEX(ide_setting_mtx);
350 EXPORT_SYMBOL_GPL(ide_setting_mtx);
353 * ide_spin_wait_hwgroup - wait for group
354 * @drive: drive in the group
356 * Wait for an IDE device group to go non busy and then return
357 * holding the ide_lock which guards the hwgroup->busy status
358 * and right to use it.
361 int ide_spin_wait_hwgroup (ide_drive_t *drive)
363 ide_hwgroup_t *hwgroup = HWGROUP(drive);
364 unsigned long timeout = jiffies + (3 * HZ);
366 spin_lock_irq(&ide_lock);
368 while (hwgroup->busy) {
369 unsigned long lflags;
370 spin_unlock_irq(&ide_lock);
371 local_irq_set(lflags);
372 if (time_after(jiffies, timeout)) {
373 local_irq_restore(lflags);
374 printk(KERN_ERR "%s: channel busy\n", drive->name);
377 local_irq_restore(lflags);
378 spin_lock_irq(&ide_lock);
383 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
385 int set_io_32bit(ide_drive_t *drive, int arg)
387 if (drive->no_io_32bit)
390 if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
393 if (ide_spin_wait_hwgroup(drive))
396 drive->io_32bit = arg;
398 spin_unlock_irq(&ide_lock);
403 static int set_ksettings(ide_drive_t *drive, int arg)
405 if (arg < 0 || arg > 1)
408 if (ide_spin_wait_hwgroup(drive))
410 drive->keep_settings = arg;
411 spin_unlock_irq(&ide_lock);
416 int set_using_dma(ide_drive_t *drive, int arg)
418 #ifdef CONFIG_BLK_DEV_IDEDMA
419 ide_hwif_t *hwif = drive->hwif;
422 if (arg < 0 || arg > 1)
425 if (!drive->id || !(drive->id->capability & 1))
428 if (hwif->dma_ops == NULL)
432 if (ide_spin_wait_hwgroup(drive))
435 * set ->busy flag, unlock and let it ride
437 hwif->hwgroup->busy = 1;
438 spin_unlock_irq(&ide_lock);
443 if (ide_set_dma(drive))
449 * lock, clear ->busy flag and unlock before leaving
451 spin_lock_irq(&ide_lock);
452 hwif->hwgroup->busy = 0;
453 spin_unlock_irq(&ide_lock);
457 if (arg < 0 || arg > 1)
464 int set_pio_mode(ide_drive_t *drive, int arg)
467 ide_hwif_t *hwif = drive->hwif;
468 const struct ide_port_ops *port_ops = hwif->port_ops;
470 if (arg < 0 || arg > 255)
473 if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
474 (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
477 if (drive->special.b.set_tune)
480 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
481 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
483 drive->tune_req = (u8) arg;
484 drive->special.b.set_tune = 1;
486 blk_execute_rq(drive->queue, NULL, rq, 0);
492 static int set_unmaskirq(ide_drive_t *drive, int arg)
494 if (drive->no_unmask)
497 if (arg < 0 || arg > 1)
500 if (ide_spin_wait_hwgroup(drive))
503 spin_unlock_irq(&ide_lock);
508 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
510 ide_drive_t *drive = dev->driver_data;
511 ide_hwif_t *hwif = HWIF(drive);
513 struct request_pm_state rqpm;
517 /* Call ACPI _GTM only once */
518 if (!(drive->dn % 2))
519 ide_acpi_get_timing(hwif);
521 memset(&rqpm, 0, sizeof(rqpm));
522 memset(&args, 0, sizeof(args));
523 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
524 rq->cmd_type = REQ_TYPE_PM_SUSPEND;
527 rqpm.pm_step = ide_pm_state_start_suspend;
528 if (mesg.event == PM_EVENT_PRETHAW)
529 mesg.event = PM_EVENT_FREEZE;
530 rqpm.pm_state = mesg.event;
532 ret = blk_execute_rq(drive->queue, NULL, rq, 0);
534 /* only call ACPI _PS3 after both drivers are suspended */
535 if (!ret && (((drive->dn % 2) && hwif->drives[0].present
536 && hwif->drives[1].present)
537 || !hwif->drives[0].present
538 || !hwif->drives[1].present))
539 ide_acpi_set_state(hwif, 0);
543 static int generic_ide_resume(struct device *dev)
545 ide_drive_t *drive = dev->driver_data;
546 ide_hwif_t *hwif = HWIF(drive);
548 struct request_pm_state rqpm;
552 /* Call ACPI _STM only once */
553 if (!(drive->dn % 2)) {
554 ide_acpi_set_state(hwif, 1);
555 ide_acpi_push_timing(hwif);
558 ide_acpi_exec_tfs(drive);
560 memset(&rqpm, 0, sizeof(rqpm));
561 memset(&args, 0, sizeof(args));
562 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
563 rq->cmd_type = REQ_TYPE_PM_RESUME;
564 rq->cmd_flags |= REQ_PREEMPT;
567 rqpm.pm_step = ide_pm_state_start_resume;
568 rqpm.pm_state = PM_EVENT_ON;
570 err = blk_execute_rq(drive->queue, NULL, rq, 1);
573 if (err == 0 && dev->driver) {
574 ide_driver_t *drv = to_ide_driver(dev->driver);
583 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
584 unsigned int cmd, unsigned long arg)
588 void __user *p = (void __user *)arg;
589 int err = 0, (*setfunc)(ide_drive_t *, int);
593 case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
594 case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
595 case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
596 case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
597 case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
598 case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
599 case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
600 case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
601 case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
605 case HDIO_OBSOLETE_IDENTITY:
606 case HDIO_GET_IDENTITY:
607 if (bdev != bdev->bd_contains)
609 if (drive->id_read == 0)
611 if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
616 return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
617 drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
618 drive->nice1 << IDE_NICE_1,
619 (long __user *) arg);
620 #ifdef CONFIG_IDE_TASK_IOCTL
621 case HDIO_DRIVE_TASKFILE:
622 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
624 switch(drive->media) {
626 return ide_taskfile_ioctl(drive, cmd, arg);
630 #endif /* CONFIG_IDE_TASK_IOCTL */
633 if (!capable(CAP_SYS_RAWIO))
635 return ide_cmd_ioctl(drive, cmd, arg);
637 case HDIO_DRIVE_TASK:
638 if (!capable(CAP_SYS_RAWIO))
640 return ide_task_ioctl(drive, cmd, arg);
642 if (!capable(CAP_SYS_ADMIN)) return -EACCES;
643 if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
645 drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
646 drv = *(ide_driver_t **)bdev->bd_disk->private_data;
647 if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
648 drive->dsc_overlap = 0;
651 drive->nice1 = (arg >> IDE_NICE_1) & 1;
653 case HDIO_DRIVE_RESET:
654 if (!capable(CAP_SYS_ADMIN))
658 * Abort the current command on the
659 * group if there is one, taking
660 * care not to allow anything else
661 * to be queued and to die on the
662 * spot if we miss one somehow
665 spin_lock_irqsave(&ide_lock, flags);
667 if (HWGROUP(drive)->resetting) {
668 spin_unlock_irqrestore(&ide_lock, flags);
672 ide_abort(drive, "drive reset");
674 BUG_ON(HWGROUP(drive)->handler);
676 /* Ensure nothing gets queued after we
677 drop the lock. Reset will clear the busy */
679 HWGROUP(drive)->busy = 1;
680 spin_unlock_irqrestore(&ide_lock, flags);
681 (void) ide_do_reset(drive);
684 case HDIO_GET_BUSSTATE:
685 if (!capable(CAP_SYS_ADMIN))
687 if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
691 case HDIO_SET_BUSSTATE:
692 if (!capable(CAP_SYS_ADMIN))
700 mutex_lock(&ide_setting_mtx);
701 spin_lock_irqsave(&ide_lock, flags);
703 spin_unlock_irqrestore(&ide_lock, flags);
704 mutex_unlock(&ide_setting_mtx);
705 return err >= 0 ? put_user(err, (long __user *)arg) : err;
708 if (bdev != bdev->bd_contains)
711 if (!capable(CAP_SYS_ADMIN))
714 mutex_lock(&ide_setting_mtx);
715 err = setfunc(drive, arg);
716 mutex_unlock(&ide_setting_mtx);
722 EXPORT_SYMBOL(generic_ide_ioctl);
725 * stridx() returns the offset of c within s,
726 * or -1 if c is '\0' or not found within s.
728 static int __init stridx (const char *s, char c)
730 char *i = strchr(s, c);
731 return (i && c) ? i - s : -1;
735 * match_parm() does parsing for ide_setup():
737 * 1. the first char of s must be '='.
738 * 2. if the remainder matches one of the supplied keywords,
739 * the index (1 based) of the keyword is negated and returned.
740 * 3. if the remainder is a series of no more than max_vals numbers
741 * separated by commas, the numbers are saved in vals[] and a
742 * count of how many were saved is returned. Base10 is assumed,
743 * and base16 is allowed when prefixed with "0x".
744 * 4. otherwise, zero is returned.
746 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
748 static const char *decimal = "0123456789";
749 static const char *hex = "0123456789abcdef";
754 * Try matching against the supplied keywords,
755 * and return -(index+1) if we match one
757 if (keywords != NULL) {
758 for (i = 0; *keywords != NULL; ++i) {
759 if (!strcmp(s, *keywords++))
764 * Look for a series of no more than "max_vals"
765 * numeric values separated by commas, in base10,
766 * or base16 when prefixed with "0x".
767 * Return a count of how many were found.
769 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
771 while ((i = stridx(decimal, *++s)) >= 0)
772 vals[n] = (vals[n] * 10) + i;
773 if (*s == 'x' && !vals[n]) {
774 while ((i = stridx(hex, *++s)) >= 0)
775 vals[n] = (vals[n] * 0x10) + i;
779 if (*s == ',' || *s == ';')
785 return 0; /* zero = nothing matched */
789 * ide_setup() gets called VERY EARLY during initialization,
790 * to handle kernel "command line" strings beginning with "hdx=" or "ide".
792 * Remember to update Documentation/ide/ide.txt if you change something here.
794 static int __init ide_setup(char *s)
798 unsigned int hw, unit;
800 const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
802 if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */
803 return 0; /* driver and not us */
805 if (strncmp(s, "ide", 3) && strncmp(s, "hd", 2))
808 printk(KERN_INFO "ide_setup: %s", s);
811 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
812 if (!strcmp(s, "ide=doubler")) {
813 extern int ide_doubler;
815 printk(" : Enabled support for IDE doublers\n");
817 goto obsolete_option;
819 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
821 if (!strcmp(s, "ide=nodma")) {
822 printk(" : Prevented DMA\n");
824 goto obsolete_option;
827 #ifdef CONFIG_BLK_DEV_IDEACPI
828 if (!strcmp(s, "ide=noacpi")) {
829 //printk(" : Disable IDE ACPI support.\n");
831 goto obsolete_option;
833 if (!strcmp(s, "ide=acpigtf")) {
834 //printk(" : Enable IDE ACPI _GTF support.\n");
836 goto obsolete_option;
838 if (!strcmp(s, "ide=acpionboot")) {
839 //printk(" : Call IDE ACPI methods on boot.\n");
841 goto obsolete_option;
843 #endif /* CONFIG_BLK_DEV_IDEACPI */
846 * Look for drive options: "hdx="
848 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
849 const char *hd_words[] = {
850 "none", "noprobe", "nowerr", "cdrom", "nodma",
851 "-6", "-7", "-8", "-9", "-10",
852 "noflush", "remap", "remap63", "scsi", NULL };
854 hw = unit / MAX_DRIVES;
855 unit = unit % MAX_DRIVES;
856 hwif = &ide_hwifs[hw];
857 drive = &hwif->drives[unit];
858 if (strncmp(s + 4, "ide-", 4) == 0) {
859 strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
860 goto obsolete_option;
862 switch (match_parm(&s[3], hd_words, vals, 3)) {
863 case -1: /* "none" */
864 case -2: /* "noprobe" */
866 goto obsolete_option;
867 case -3: /* "nowerr" */
868 drive->bad_wstat = BAD_R_STAT;
869 goto obsolete_option;
870 case -4: /* "cdrom" */
872 drive->media = ide_cdrom;
873 /* an ATAPI device ignores DRDY */
874 drive->ready_stat = 0;
875 goto obsolete_option;
878 goto obsolete_option;
879 case -11: /* noflush */
881 goto obsolete_option;
882 case -12: /* "remap" */
883 drive->remap_0_to_1 = 1;
884 goto obsolete_option;
885 case -13: /* "remap63" */
887 goto obsolete_option;
888 case -14: /* "scsi" */
890 goto obsolete_option;
891 case 3: /* cyl,head,sect */
892 drive->media = ide_disk;
893 drive->ready_stat = READY_STAT;
894 drive->cyl = drive->bios_cyl = vals[0];
895 drive->head = drive->bios_head = vals[1];
896 drive->sect = drive->bios_sect = vals[2];
898 drive->forced_geom = 1;
899 goto obsolete_option;
906 printk(" -- BAD OPTION\n");
909 printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
913 EXPORT_SYMBOL(ide_lock);
915 static int ide_bus_match(struct device *dev, struct device_driver *drv)
920 static char *media_string(ide_drive_t *drive)
922 switch (drive->media) {
938 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
940 ide_drive_t *drive = to_ide_device(dev);
941 return sprintf(buf, "%s\n", media_string(drive));
944 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
946 ide_drive_t *drive = to_ide_device(dev);
947 return sprintf(buf, "%s\n", drive->name);
950 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
952 ide_drive_t *drive = to_ide_device(dev);
953 return sprintf(buf, "ide:m-%s\n", media_string(drive));
956 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
959 ide_drive_t *drive = to_ide_device(dev);
960 return sprintf(buf, "%s\n", drive->id->model);
963 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
966 ide_drive_t *drive = to_ide_device(dev);
967 return sprintf(buf, "%s\n", drive->id->fw_rev);
970 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
973 ide_drive_t *drive = to_ide_device(dev);
974 return sprintf(buf, "%s\n", drive->id->serial_no);
977 static struct device_attribute ide_dev_attrs[] = {
979 __ATTR_RO(drivename),
983 __ATTR(serial, 0400, serial_show, NULL),
987 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
989 ide_drive_t *drive = to_ide_device(dev);
991 add_uevent_var(env, "MEDIA=%s", media_string(drive));
992 add_uevent_var(env, "DRIVENAME=%s", drive->name);
993 add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
997 static int generic_ide_probe(struct device *dev)
999 ide_drive_t *drive = to_ide_device(dev);
1000 ide_driver_t *drv = to_ide_driver(dev->driver);
1002 return drv->probe ? drv->probe(drive) : -ENODEV;
1005 static int generic_ide_remove(struct device *dev)
1007 ide_drive_t *drive = to_ide_device(dev);
1008 ide_driver_t *drv = to_ide_driver(dev->driver);
1016 static void generic_ide_shutdown(struct device *dev)
1018 ide_drive_t *drive = to_ide_device(dev);
1019 ide_driver_t *drv = to_ide_driver(dev->driver);
1021 if (dev->driver && drv->shutdown)
1022 drv->shutdown(drive);
1025 struct bus_type ide_bus_type = {
1027 .match = ide_bus_match,
1028 .uevent = ide_uevent,
1029 .probe = generic_ide_probe,
1030 .remove = generic_ide_remove,
1031 .shutdown = generic_ide_shutdown,
1032 .dev_attrs = ide_dev_attrs,
1033 .suspend = generic_ide_suspend,
1034 .resume = generic_ide_resume,
1037 EXPORT_SYMBOL_GPL(ide_bus_type);
1040 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1042 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1043 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1046 EXPORT_SYMBOL_GPL(ide_pci_clk);
1048 module_param_named(pci_clock, ide_pci_clk, int, 0);
1049 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1051 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1054 unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1056 if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1057 sscanf(s, "%d.%d", &a, &b) != 2)
1060 i = a * MAX_DRIVES + b;
1062 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1066 *dev_param_mask |= (1 << i);
1068 *dev_param_mask &= (1 << i);
1073 static unsigned int ide_nodma;
1075 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1076 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1078 static unsigned int ide_noflush;
1080 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1081 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1083 static unsigned int ide_noprobe;
1085 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1086 MODULE_PARM_DESC(noprobe, "skip probing for a device");
1088 static unsigned int ide_nowerr;
1090 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1091 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1093 static unsigned int ide_cdroms;
1095 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1096 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1104 static unsigned int ide_disks;
1105 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1107 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1109 int a, b, c = 0, h = 0, s = 0, i, j = 1;
1111 if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1112 sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1115 i = a * MAX_DRIVES + b;
1117 if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1120 if (c > INT_MAX || h > 255 || s > 255)
1124 ide_disks |= (1 << i);
1126 ide_disks &= (1 << i);
1128 ide_disks_chs[i].cyl = c;
1129 ide_disks_chs[i].head = h;
1130 ide_disks_chs[i].sect = s;
1135 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1136 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1138 static void ide_dev_apply_params(ide_drive_t *drive)
1140 int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1142 if (ide_nodma & (1 << i)) {
1143 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1146 if (ide_noflush & (1 << i)) {
1147 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1151 if (ide_noprobe & (1 << i)) {
1152 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1155 if (ide_nowerr & (1 << i)) {
1156 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1158 drive->bad_wstat = BAD_R_STAT;
1160 if (ide_cdroms & (1 << i)) {
1161 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1163 drive->media = ide_cdrom;
1164 /* an ATAPI device ignores DRDY */
1165 drive->ready_stat = 0;
1167 if (ide_disks & (1 << i)) {
1168 drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
1169 drive->head = drive->bios_head = ide_disks_chs[i].head;
1170 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1171 drive->forced_geom = 1;
1172 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1174 drive->cyl, drive->head, drive->sect);
1176 drive->media = ide_disk;
1177 drive->ready_stat = READY_STAT;
1181 static unsigned int ide_ignore_cable;
1183 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1187 if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1190 if (i >= MAX_HWIFS || j < 0 || j > 1)
1194 ide_ignore_cable |= (1 << i);
1196 ide_ignore_cable &= (1 << i);
1201 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1202 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1204 void ide_port_apply_params(ide_hwif_t *hwif)
1208 if (ide_ignore_cable & (1 << hwif->index)) {
1209 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1211 hwif->cbl = ATA_CBL_PATA40_SHORT;
1214 for (i = 0; i < MAX_DRIVES; i++)
1215 ide_dev_apply_params(&hwif->drives[i]);
1219 * This is gets invoked once during initialization, to set *everything* up
1221 static int __init ide_init(void)
1225 printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1227 ret = bus_register(&ide_bus_type);
1229 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1233 ide_port_class = class_create(THIS_MODULE, "ide_port");
1234 if (IS_ERR(ide_port_class)) {
1235 ret = PTR_ERR(ide_port_class);
1236 goto out_port_class;
1246 bus_unregister(&ide_bus_type);
1252 static char *options = NULL;
1253 module_param(options, charp, 0);
1254 MODULE_LICENSE("GPL");
1256 static void __init parse_options (char *line)
1260 if (line == NULL || !*line)
1262 while ((line = next) != NULL) {
1263 if ((next = strchr(line,' ')) != NULL)
1265 if (!ide_setup(line))
1266 printk (KERN_INFO "Unknown option '%s'\n", line);
1270 int __init init_module (void)
1272 parse_options(options);
1276 void __exit cleanup_module (void)
1280 class_destroy(ide_port_class);
1282 bus_unregister(&ide_bus_type);
1287 __setup("", ide_setup);
1289 module_init(ide_init);