2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 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 IDE probe module, as evolved from hd.c and ide.c.
15 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/kernel.h>
23 #include <linux/timer.h>
25 #include <linux/interrupt.h>
26 #include <linux/major.h>
27 #include <linux/errno.h>
28 #include <linux/genhd.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/ide.h>
32 #include <linux/spinlock.h>
33 #include <linux/kmod.h>
34 #include <linux/pci.h>
35 #include <linux/scatterlist.h>
37 #include <asm/byteorder.h>
39 #include <asm/uaccess.h>
43 * generic_id - add a generic drive id
44 * @drive: drive to make an ID block for
46 * Add a fake id field to the drive we are passed. This allows
47 * use to skip a ton of NULL checks (which people always miss)
48 * and make drive properties unconditional outside of this file
51 static void generic_id(ide_drive_t *drive)
53 drive->id->cyls = drive->cyl;
54 drive->id->heads = drive->head;
55 drive->id->sectors = drive->sect;
56 drive->id->cur_cyls = drive->cyl;
57 drive->id->cur_heads = drive->head;
58 drive->id->cur_sectors = drive->sect;
61 static void ide_disk_init_chs(ide_drive_t *drive)
63 struct hd_driveid *id = drive->id;
65 /* Extract geometry if we did not already have one for the drive */
66 if (!drive->cyl || !drive->head || !drive->sect) {
67 drive->cyl = drive->bios_cyl = id->cyls;
68 drive->head = drive->bios_head = id->heads;
69 drive->sect = drive->bios_sect = id->sectors;
72 /* Handle logical geometry translation by the drive */
73 if ((id->field_valid & 1) && id->cur_cyls &&
74 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
75 drive->cyl = id->cur_cyls;
76 drive->head = id->cur_heads;
77 drive->sect = id->cur_sectors;
80 /* Use physical geometry if what we have still makes no sense */
81 if (drive->head > 16 && id->heads && id->heads <= 16) {
82 drive->cyl = id->cyls;
83 drive->head = id->heads;
84 drive->sect = id->sectors;
88 static void ide_disk_init_mult_count(ide_drive_t *drive)
90 struct hd_driveid *id = drive->id;
92 drive->mult_count = 0;
93 if (id->max_multsect) {
94 #ifdef CONFIG_IDEDISK_MULTI_MODE
95 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
96 id->multsect_valid = id->multsect ? 1 : 0;
97 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
98 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
99 #else /* original, pre IDE-NFG, per request of AC */
101 if (drive->mult_req > id->max_multsect)
102 drive->mult_req = id->max_multsect;
103 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
104 drive->special.b.set_multmode = 1;
110 * do_identify - identify a drive
111 * @drive: drive to identify
114 * Called when we have issued a drive identify command to
115 * read and parse the results. This function is run with
116 * interrupts disabled.
119 static inline void do_identify (ide_drive_t *drive, u8 cmd)
121 ide_hwif_t *hwif = HWIF(drive);
123 struct hd_driveid *id;
126 /* read 512 bytes of id info */
127 hwif->ata_input_data(drive, id, SECTOR_WORDS);
132 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
133 ide_dump_identify((u8 *)id);
137 #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
139 * EATA SCSI controllers do a hardware ATA emulation:
140 * Ignore them if there is a driver for them available.
142 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
143 (id->model[0] == 'S' && id->model[1] == 'K')) {
144 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
147 #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
150 * WIN_IDENTIFY returns little-endian info,
151 * WIN_PIDENTIFY *usually* returns little-endian info.
153 if (cmd == WIN_PIDENTIFY) {
154 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
155 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
156 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
157 /* Vertos drives may still be weird */
160 ide_fixstring(id->model, sizeof(id->model), bswap);
161 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
162 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
164 /* we depend on this a lot! */
165 id->model[sizeof(id->model)-1] = '\0';
167 if (strstr(id->model, "E X A B Y T E N E S T"))
170 printk("%s: %s, ", drive->name, id->model);
175 * Check for an ATAPI device
177 if (cmd == WIN_PIDENTIFY) {
178 u8 type = (id->config >> 8) & 0x1f;
182 if (!strstr(id->model, "CD-ROM")) {
183 if (!strstr(id->model, "oppy") &&
184 !strstr(id->model, "poyp") &&
185 !strstr(id->model, "ZIP"))
186 printk("cdrom or floppy?, assuming ");
187 if (drive->media != ide_cdrom) {
189 drive->removable = 1;
193 /* Early cdrom models used zero */
196 drive->removable = 1;
198 /* kludge for Apple PowerBook internal zip */
199 if (!strstr(id->model, "CD-ROM") &&
200 strstr(id->model, "ZIP")) {
206 printk ("CD/DVD-ROM");
213 drive->removable = 1;
216 printk("UNKNOWN (type %d)", type);
221 /* an ATAPI device ignores DRDY */
222 drive->ready_stat = 0;
227 * Not an ATAPI device: looks like a "regular" hard disk
231 * 0x848a = CompactFlash device
232 * These are *not* removable in Linux definition of the term
235 if ((id->config != 0x848a) && (id->config & (1<<7)))
236 drive->removable = 1;
238 drive->media = ide_disk;
239 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
250 * actual_try_to_identify - send ata/atapi identify
251 * @drive: drive to identify
252 * @cmd: command to use
254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
255 * and waits for a response. It also monitors irqs while this is
256 * happening, in hope of automatically determining which one is
257 * being used by the interface.
259 * Returns: 0 device was identified
260 * 1 device timed-out (no response to identify request)
261 * 2 device aborted the command (refused to identify itself)
264 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
266 ide_hwif_t *hwif = HWIF(drive);
267 int use_altstatus = 0, rc;
268 unsigned long timeout;
271 /* take a deep breath */
274 if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
275 a = ide_read_altstatus(drive);
276 s = ide_read_status(drive);
277 if ((a ^ s) & ~INDEX_STAT)
278 /* ancient Seagate drives, broken interfaces */
279 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
280 "instead of ALTSTATUS(0x%02x)\n",
283 /* use non-intrusive polling */
287 /* set features register for atapi
288 * identify command to be sure of reply
290 if ((cmd == WIN_PIDENTIFY))
291 /* disable dma & overlap */
292 hwif->OUTB(0, hwif->io_ports[IDE_FEATURE_OFFSET]);
294 /* ask drive for ID */
295 hwif->OUTB(cmd, hwif->io_ports[IDE_COMMAND_OFFSET]);
297 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
300 if (time_after(jiffies, timeout)) {
301 /* drive timed-out */
304 /* give drive a breather */
306 s = use_altstatus ? ide_read_altstatus(drive)
307 : ide_read_status(drive);
308 } while (s & BUSY_STAT);
310 /* wait for IRQ and DRQ_STAT */
312 s = ide_read_status(drive);
314 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
317 /* local CPU only; some systems need this */
318 local_irq_save(flags);
319 /* drive returned ID */
320 do_identify(drive, cmd);
321 /* drive responded with ID */
323 /* clear drive IRQ */
324 (void)ide_read_status(drive);
325 local_irq_restore(flags);
327 /* drive refused ID */
334 * try_to_identify - try to identify a drive
335 * @drive: drive to probe
336 * @cmd: command to use
338 * Issue the identify command and then do IRQ probing to
339 * complete the identification when needed by finding the
340 * IRQ the drive is attached to
343 static int try_to_identify (ide_drive_t *drive, u8 cmd)
345 ide_hwif_t *hwif = HWIF(drive);
348 unsigned long cookie = 0;
351 * Disable device irq unless we need to
352 * probe for it. Otherwise we'll get spurious
353 * interrupts during the identify-phase that
354 * the irq handler isn't expecting.
356 if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
359 cookie = probe_irq_on();
361 ide_set_irq(drive, autoprobe);
364 retval = actual_try_to_identify(drive, cmd);
369 ide_set_irq(drive, 0);
370 /* clear drive IRQ */
371 (void)ide_read_status(drive);
373 irq = probe_irq_off(cookie);
378 /* Mmmm.. multiple IRQs..
379 * don't know which was ours
381 printk("%s: IRQ probe failed (0x%lx)\n",
382 drive->name, cookie);
389 static int ide_busy_sleep(ide_hwif_t *hwif)
391 unsigned long timeout = jiffies + WAIT_WORSTCASE;
396 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
397 if ((stat & BUSY_STAT) == 0)
399 } while (time_before(jiffies, timeout));
405 * do_probe - probe an IDE device
406 * @drive: drive to probe
407 * @cmd: command to use
409 * do_probe() has the difficult job of finding a drive if it exists,
410 * without getting hung up if it doesn't exist, without trampling on
411 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
413 * If a drive is "known" to exist (from CMOS or kernel parameters),
414 * but does not respond right away, the probe will "hang in there"
415 * for the maximum wait time (about 30 seconds), otherwise it will
416 * exit much more quickly.
418 * Returns: 0 device was identified
419 * 1 device timed-out (no response to identify request)
420 * 2 device aborted the command (refused to identify itself)
421 * 3 bad status from device (possible for ATAPI drives)
422 * 4 probe was not attempted because failure was obvious
425 static int do_probe (ide_drive_t *drive, u8 cmd)
427 ide_hwif_t *hwif = HWIF(drive);
431 if (drive->present) {
432 /* avoid waiting for inappropriate probes */
433 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
437 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
438 drive->name, drive->present, drive->media,
439 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
442 /* needed for some systems
443 * (e.g. crw9624 as drive0 with disk as slave)
448 if (hwif->INB(hwif->io_ports[IDE_SELECT_OFFSET]) != drive->select.all &&
450 if (drive->select.b.unit != 0) {
451 /* exit with drive0 selected */
452 SELECT_DRIVE(&hwif->drives[0]);
453 /* allow BUSY_STAT to assert & clear */
456 /* no i/f present: mmm.. this should be a 4 -ml */
460 stat = ide_read_status(drive);
462 if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
463 drive->present || cmd == WIN_PIDENTIFY) {
464 /* send cmd and wait */
465 if ((rc = try_to_identify(drive, cmd))) {
466 /* failed: try again */
467 rc = try_to_identify(drive,cmd);
470 stat = ide_read_status(drive);
472 if (stat == (BUSY_STAT | READY_STAT))
475 if (rc == 1 && cmd == WIN_PIDENTIFY) {
476 printk(KERN_ERR "%s: no response (status = 0x%02x), "
477 "resetting drive\n", drive->name, stat);
479 hwif->OUTB(drive->select.all,
480 hwif->io_ports[IDE_SELECT_OFFSET]);
483 hwif->io_ports[IDE_COMMAND_OFFSET]);
484 (void)ide_busy_sleep(hwif);
485 rc = try_to_identify(drive, cmd);
488 /* ensure drive IRQ is clear */
489 stat = ide_read_status(drive);
492 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
495 /* not present or maybe ATAPI */
498 if (drive->select.b.unit != 0) {
499 /* exit with drive0 selected */
500 SELECT_DRIVE(&hwif->drives[0]);
502 /* ensure drive irq is clear */
503 (void)ide_read_status(drive);
511 static void enable_nest (ide_drive_t *drive)
513 ide_hwif_t *hwif = HWIF(drive);
516 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
519 hwif->OUTB(EXABYTE_ENABLE_NEST, hwif->io_ports[IDE_COMMAND_OFFSET]);
521 if (ide_busy_sleep(hwif)) {
522 printk(KERN_CONT "failed (timeout)\n");
528 stat = ide_read_status(drive);
530 if (!OK_STAT(stat, 0, BAD_STAT))
531 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
533 printk(KERN_CONT "success\n");
535 /* if !(success||timed-out) */
536 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
537 /* look for ATAPI device */
538 (void) do_probe(drive, WIN_PIDENTIFY);
543 * probe_for_drives - upper level drive probe
544 * @drive: drive to probe for
546 * probe_for_drive() tests for existence of a given drive using do_probe()
547 * and presents things to the user as needed.
549 * Returns: 0 no device was found
550 * 1 device was found (note: drive->present might
554 static inline u8 probe_for_drive (ide_drive_t *drive)
557 * In order to keep things simple we have an id
558 * block for all drives at all times. If the device
559 * is pre ATA or refuses ATA/ATAPI identify we
560 * will add faked data to this.
562 * Also note that 0 everywhere means "can't do X"
565 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
567 if(drive->id == NULL)
569 printk(KERN_ERR "ide: out of memory for id data.\n");
572 strcpy(drive->id->model, "UNKNOWN");
577 /* if !(success||timed-out) */
578 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
579 /* look for ATAPI device */
580 (void) do_probe(drive, WIN_PIDENTIFY);
583 /* drive not found */
585 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
588 /* identification failed? */
589 if (!drive->id_read) {
590 if (drive->media == ide_disk) {
591 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
592 drive->name, drive->cyl,
593 drive->head, drive->sect);
594 } else if (drive->media == ide_cdrom) {
595 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
598 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
602 /* drive was found */
606 /* The drive wasn't being helpful. Add generic info only */
607 if (drive->id_read == 0) {
612 if (drive->media == ide_disk) {
613 ide_disk_init_chs(drive);
614 ide_disk_init_mult_count(drive);
617 return drive->present;
620 static void hwif_release_dev (struct device *dev)
622 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
624 complete(&hwif->gendev_rel_comp);
627 static int ide_register_port(ide_hwif_t *hwif)
631 /* register with global device tree */
632 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
633 hwif->gendev.driver_data = hwif;
634 if (hwif->gendev.parent == NULL) {
636 hwif->gendev.parent = hwif->dev;
638 /* Would like to do = &device_legacy */
639 hwif->gendev.parent = NULL;
641 hwif->gendev.release = hwif_release_dev;
642 ret = device_register(&hwif->gendev);
644 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
649 get_device(&hwif->gendev);
651 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
652 MKDEV(0, 0), hwif->name);
653 if (IS_ERR(hwif->portdev)) {
654 ret = PTR_ERR(hwif->portdev);
655 device_unregister(&hwif->gendev);
657 dev_set_drvdata(hwif->portdev, hwif);
663 * ide_port_wait_ready - wait for port to become ready
666 * This is needed on some PPCs and a bunch of BIOS-less embedded
667 * platforms. Typical cases are:
669 * - The firmware hard reset the disk before booting the kernel,
670 * the drive is still doing it's poweron-reset sequence, that
671 * can take up to 30 seconds.
673 * - The firmware does nothing (or no firmware), the device is
674 * still in POST state (same as above actually).
676 * - Some CD/DVD/Writer combo drives tend to drive the bus during
677 * their reset sequence even when they are non-selected slave
678 * devices, thus preventing discovery of the main HD.
680 * Doing this wait-for-non-busy should not harm any existing
681 * configuration and fix some issues like the above.
685 * Returns 0 on success, error code (< 0) otherwise.
688 static int ide_port_wait_ready(ide_hwif_t *hwif)
692 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
694 /* Let HW settle down a bit from whatever init state we
698 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
699 * I know of at least one disk who takes 31 seconds, I use 35
702 rc = ide_wait_not_busy(hwif, 35000);
706 /* Now make sure both master & slave are ready */
707 for (unit = 0; unit < MAX_DRIVES; unit++) {
708 ide_drive_t *drive = &hwif->drives[unit];
710 /* Ignore disks that we will not probe for later. */
711 if (!drive->noprobe || drive->present) {
713 ide_set_irq(drive, 1);
715 rc = ide_wait_not_busy(hwif, 35000);
719 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
723 /* Exit function with master reselected (let's be sane) */
725 SELECT_DRIVE(&hwif->drives[0]);
731 * ide_undecoded_slave - look for bad CF adapters
734 * Analyse the drives on the interface and attempt to decide if we
735 * have the same drive viewed twice. This occurs with crap CF adapters
736 * and PCMCIA sometimes.
739 void ide_undecoded_slave(ide_drive_t *drive1)
741 ide_drive_t *drive0 = &drive1->hwif->drives[0];
743 if ((drive1->dn & 1) == 0 || drive0->present == 0)
746 /* If the models don't match they are not the same product */
747 if (strcmp(drive0->id->model, drive1->id->model))
750 /* Serial numbers do not match */
751 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
754 /* No serial number, thankfully very rare for CF */
755 if (drive0->id->serial_no[0] == 0)
758 /* Appears to be an IDE flash adapter with decode bugs */
759 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
764 EXPORT_SYMBOL_GPL(ide_undecoded_slave);
766 static int ide_probe_port(ide_hwif_t *hwif)
770 int unit, rc = -ENODEV;
772 BUG_ON(hwif->present);
774 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe)
778 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
779 * we'll install our IRQ driver much later...
783 disable_irq(hwif->irq);
785 local_irq_set(flags);
787 if (ide_port_wait_ready(hwif) == -EBUSY)
788 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
791 * Second drive should only exist if first drive was found,
792 * but a lot of cdrom drives are configured as single slaves.
794 for (unit = 0; unit < MAX_DRIVES; ++unit) {
795 ide_drive_t *drive = &hwif->drives[unit];
796 drive->dn = (hwif->channel ? 2 : 0) + unit;
797 (void) probe_for_drive(drive);
802 local_irq_restore(flags);
805 * Use cached IRQ number. It might be (and is...) changed by probe
814 static void ide_port_tune_devices(ide_hwif_t *hwif)
816 const struct ide_port_ops *port_ops = hwif->port_ops;
819 for (unit = 0; unit < MAX_DRIVES; unit++) {
820 ide_drive_t *drive = &hwif->drives[unit];
822 if (drive->present && port_ops && port_ops->quirkproc)
823 port_ops->quirkproc(drive);
826 for (unit = 0; unit < MAX_DRIVES; ++unit) {
827 ide_drive_t *drive = &hwif->drives[unit];
829 if (drive->present) {
830 ide_set_max_pio(drive);
839 for (unit = 0; unit < MAX_DRIVES; ++unit) {
840 ide_drive_t *drive = &hwif->drives[unit];
842 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
843 drive->no_io_32bit = 1;
845 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
851 * save_match() is used to simplify logic in init_irq() below.
853 * A loophole here is that we may not know about a particular
854 * hwif's irq until after that hwif is actually probed/initialized..
855 * This could be a problem for the case where an hwif is on a
856 * dual interface that requires serialization (eg. cmd640) and another
857 * hwif using one of the same irqs is initialized beforehand.
859 * This routine detects and reports such situations, but does not fix them.
861 static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
863 ide_hwif_t *m = *match;
865 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
868 printk("%s: potential irq problem with %s and %s\n",
869 hwif->name, new->name, m->name);
871 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
874 #endif /* MAX_HWIFS > 1 */
879 static int ide_init_queue(ide_drive_t *drive)
881 struct request_queue *q;
882 ide_hwif_t *hwif = HWIF(drive);
883 int max_sectors = 256;
884 int max_sg_entries = PRD_ENTRIES;
887 * Our default set up assumes the normal IDE case,
888 * that is 64K segmenting, standard PRD setup
889 * and LBA28. Some drivers then impose their own
890 * limits and LBA48 we could raise it but as yet
894 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
898 q->queuedata = drive;
899 blk_queue_segment_boundary(q, 0xffff);
901 if (hwif->rqsize < max_sectors)
902 max_sectors = hwif->rqsize;
903 blk_queue_max_sectors(q, max_sectors);
906 /* When we have an IOMMU, we may have a problem where pci_map_sg()
907 * creates segments that don't completely match our boundary
908 * requirements and thus need to be broken up again. Because it
909 * doesn't align properly either, we may actually have to break up
910 * to more segments than what was we got in the first place, a max
911 * worst case is twice as many.
912 * This will be fixed once we teach pci_map_sg() about our boundary
913 * requirements, hopefully soon. *FIXME*
915 if (!PCI_DMA_BUS_IS_PHYS)
916 max_sg_entries >>= 1;
917 #endif /* CONFIG_PCI */
919 blk_queue_max_hw_segments(q, max_sg_entries);
920 blk_queue_max_phys_segments(q, max_sg_entries);
922 /* assign drive queue */
925 /* needs drive->queue to be set */
926 ide_toggle_bounce(drive, 1);
931 static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
933 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
935 spin_lock_irq(&ide_lock);
936 if (!hwgroup->drive) {
937 /* first drive for hwgroup. */
939 hwgroup->drive = drive;
940 hwgroup->hwif = HWIF(hwgroup->drive);
942 drive->next = hwgroup->drive->next;
943 hwgroup->drive->next = drive;
945 spin_unlock_irq(&ide_lock);
949 * For any present drive:
950 * - allocate the block device queue
951 * - link drive into the hwgroup
953 static void ide_port_setup_devices(ide_hwif_t *hwif)
957 mutex_lock(&ide_cfg_mtx);
958 for (i = 0; i < MAX_DRIVES; i++) {
959 ide_drive_t *drive = &hwif->drives[i];
964 if (ide_init_queue(drive)) {
965 printk(KERN_ERR "ide: failed to init %s\n",
970 ide_add_drive_to_hwgroup(drive);
972 mutex_unlock(&ide_cfg_mtx);
976 * This routine sets up the irq for an ide interface, and creates a new
977 * hwgroup for the irq/hwif if none was previously assigned.
979 * Much of the code is for correctly detecting/handling irq sharing
980 * and irq serialization situations. This is somewhat complex because
981 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
983 static int init_irq (ide_hwif_t *hwif)
986 ide_hwgroup_t *hwgroup;
987 ide_hwif_t *match = NULL;
990 BUG_ON(in_interrupt());
991 BUG_ON(irqs_disabled());
992 BUG_ON(hwif == NULL);
994 mutex_lock(&ide_cfg_mtx);
995 hwif->hwgroup = NULL;
998 * Group up with any other hwifs that share our irq(s).
1000 for (index = 0; index < MAX_HWIFS; index++) {
1001 ide_hwif_t *h = &ide_hwifs[index];
1002 if (h->hwgroup) { /* scan only initialized hwif's */
1003 if (hwif->irq == h->irq) {
1004 hwif->sharing_irq = h->sharing_irq = 1;
1005 if (hwif->chipset != ide_pci ||
1006 h->chipset != ide_pci) {
1007 save_match(hwif, h, &match);
1010 if (hwif->serialized) {
1011 if (hwif->mate && hwif->mate->irq == h->irq)
1012 save_match(hwif, h, &match);
1014 if (h->serialized) {
1015 if (h->mate && hwif->irq == h->mate->irq)
1016 save_match(hwif, h, &match);
1020 #endif /* MAX_HWIFS > 1 */
1022 * If we are still without a hwgroup, then form a new one
1025 hwgroup = match->hwgroup;
1026 hwif->hwgroup = hwgroup;
1028 * Link us into the hwgroup.
1029 * This must be done early, do ensure that unexpected_intr
1030 * can find the hwif and prevent irq storms.
1031 * No drives are attached to the new hwif, choose_drive
1032 * can't do anything stupid (yet).
1033 * Add ourself as the 2nd entry to the hwgroup->hwif
1034 * linked list, the first entry is the hwif that owns
1035 * hwgroup->handler - do not change that.
1037 spin_lock_irq(&ide_lock);
1038 hwif->next = hwgroup->hwif->next;
1039 hwgroup->hwif->next = hwif;
1040 BUG_ON(hwif->next == hwif);
1041 spin_unlock_irq(&ide_lock);
1043 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1044 hwif_to_node(hwif));
1045 if (hwgroup == NULL)
1048 hwif->hwgroup = hwgroup;
1049 hwgroup->hwif = hwif->next = hwif;
1051 init_timer(&hwgroup->timer);
1052 hwgroup->timer.function = &ide_timer_expiry;
1053 hwgroup->timer.data = (unsigned long) hwgroup;
1057 * Allocate the irq, if not already obtained for another hwif
1059 if (!match || match->irq != hwif->irq) {
1061 #if defined(__mc68000__)
1063 #endif /* __mc68000__ */
1065 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
1068 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1070 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1072 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1076 if (!hwif->rqsize) {
1077 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1078 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1081 hwif->rqsize = 65536;
1084 #if !defined(__mc68000__)
1085 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1086 hwif->io_ports[IDE_DATA_OFFSET],
1087 hwif->io_ports[IDE_DATA_OFFSET]+7,
1088 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
1090 printk("%s at 0x%08lx on irq %d", hwif->name,
1091 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
1092 #endif /* __mc68000__ */
1094 printk(" (%sed with %s)",
1095 hwif->sharing_irq ? "shar" : "serializ", match->name);
1098 mutex_unlock(&ide_cfg_mtx);
1101 ide_remove_port_from_hwgroup(hwif);
1103 mutex_unlock(&ide_cfg_mtx);
1107 static int ata_lock(dev_t dev, void *data)
1109 /* FIXME: we want to pin hwif down */
1113 static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1115 ide_hwif_t *hwif = data;
1116 int unit = *part >> PARTN_BITS;
1117 ide_drive_t *drive = &hwif->drives[unit];
1118 if (!drive->present)
1121 if (drive->media == ide_disk)
1122 request_module("ide-disk");
1124 request_module("ide-scsi");
1125 if (drive->media == ide_cdrom || drive->media == ide_optical)
1126 request_module("ide-cd");
1127 if (drive->media == ide_tape)
1128 request_module("ide-tape");
1129 if (drive->media == ide_floppy)
1130 request_module("ide-floppy");
1135 static struct kobject *exact_match(dev_t dev, int *part, void *data)
1137 struct gendisk *p = data;
1138 *part &= (1 << PARTN_BITS) - 1;
1139 return &p->dev.kobj;
1142 static int exact_lock(dev_t dev, void *data)
1144 struct gendisk *p = data;
1151 void ide_register_region(struct gendisk *disk)
1153 blk_register_region(MKDEV(disk->major, disk->first_minor),
1154 disk->minors, NULL, exact_match, exact_lock, disk);
1157 EXPORT_SYMBOL_GPL(ide_register_region);
1159 void ide_unregister_region(struct gendisk *disk)
1161 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1165 EXPORT_SYMBOL_GPL(ide_unregister_region);
1167 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1169 ide_hwif_t *hwif = drive->hwif;
1170 unsigned int unit = (drive->select.all >> 4) & 1;
1172 disk->major = hwif->major;
1173 disk->first_minor = unit << PARTN_BITS;
1174 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1175 disk->queue = drive->queue;
1178 EXPORT_SYMBOL_GPL(ide_init_disk);
1180 static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1182 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1184 if (drive == drive->next) {
1185 /* special case: last drive from hwgroup. */
1186 BUG_ON(hwgroup->drive != drive);
1187 hwgroup->drive = NULL;
1191 walk = hwgroup->drive;
1192 while (walk->next != drive)
1194 walk->next = drive->next;
1195 if (hwgroup->drive == drive) {
1196 hwgroup->drive = drive->next;
1197 hwgroup->hwif = hwgroup->drive->hwif;
1200 BUG_ON(hwgroup->drive == drive);
1203 static void drive_release_dev (struct device *dev)
1205 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1207 ide_proc_unregister_device(drive);
1209 spin_lock_irq(&ide_lock);
1210 ide_remove_drive_from_hwgroup(drive);
1214 /* Messed up locking ... */
1215 spin_unlock_irq(&ide_lock);
1216 blk_cleanup_queue(drive->queue);
1217 spin_lock_irq(&ide_lock);
1218 drive->queue = NULL;
1219 spin_unlock_irq(&ide_lock);
1221 complete(&drive->gendev_rel_comp);
1224 #ifndef ide_default_irq
1225 #define ide_default_irq(irq) 0
1228 static int hwif_init(ide_hwif_t *hwif)
1233 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1235 printk("%s: DISABLED, NO IRQ\n", hwif->name);
1240 if (register_blkdev(hwif->major, hwif->name))
1243 if (!hwif->sg_max_nents)
1244 hwif->sg_max_nents = PRD_ENTRIES;
1246 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
1248 if (!hwif->sg_table) {
1249 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1253 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
1255 if (init_irq(hwif) == 0)
1258 old_irq = hwif->irq;
1260 * It failed to initialise. Find the default IRQ for
1261 * this port and try that.
1263 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1264 printk("%s: Disabled unable to get IRQ %d.\n",
1265 hwif->name, old_irq);
1268 if (init_irq(hwif)) {
1269 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1270 hwif->name, old_irq, hwif->irq);
1273 printk("%s: probed IRQ %d failed, using default.\n",
1274 hwif->name, hwif->irq);
1277 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1278 THIS_MODULE, ata_probe, ata_lock, hwif);
1282 unregister_blkdev(hwif->major, hwif->name);
1286 static void hwif_register_devices(ide_hwif_t *hwif)
1290 for (i = 0; i < MAX_DRIVES; i++) {
1291 ide_drive_t *drive = &hwif->drives[i];
1292 struct device *dev = &drive->gendev;
1295 if (!drive->present)
1298 ide_add_generic_settings(drive);
1300 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1301 dev->parent = &hwif->gendev;
1302 dev->bus = &ide_bus_type;
1303 dev->driver_data = drive;
1304 dev->release = drive_release_dev;
1306 ret = device_register(dev);
1308 printk(KERN_WARNING "IDE: %s: device_register error: "
1309 "%d\n", __func__, ret);
1313 static void ide_port_init_devices(ide_hwif_t *hwif)
1315 const struct ide_port_ops *port_ops = hwif->port_ops;
1318 for (i = 0; i < MAX_DRIVES; i++) {
1319 ide_drive_t *drive = &hwif->drives[i];
1321 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1322 drive->io_32bit = 1;
1323 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1325 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1326 drive->no_unmask = 1;
1329 if (port_ops && port_ops->port_init_devs)
1330 port_ops->port_init_devs(hwif);
1333 static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1334 const struct ide_port_info *d)
1336 if (d->chipset != ide_etrax100)
1337 hwif->channel = port;
1340 hwif->chipset = d->chipset;
1345 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1346 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1347 hwif->irq = port ? 15 : 14;
1349 hwif->host_flags = d->host_flags;
1350 hwif->pio_mask = d->pio_mask;
1352 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1353 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1354 hwif->port_ops = d->port_ops;
1356 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1357 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
1359 hwif->mate->serialized = hwif->serialized = 1;
1362 hwif->swdma_mask = d->swdma_mask;
1363 hwif->mwdma_mask = d->mwdma_mask;
1364 hwif->ultra_mask = d->udma_mask;
1366 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1370 rc = d->init_dma(hwif, d);
1372 rc = ide_hwif_setup_dma(hwif, d);
1375 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
1376 hwif->swdma_mask = 0;
1377 hwif->mwdma_mask = 0;
1378 hwif->ultra_mask = 0;
1379 } else if (d->dma_ops)
1380 hwif->dma_ops = d->dma_ops;
1383 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1386 /* call chipset specific routine for each enabled port */
1391 static void ide_port_cable_detect(ide_hwif_t *hwif)
1393 const struct ide_port_ops *port_ops = hwif->port_ops;
1395 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
1396 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
1397 hwif->cbl = port_ops->cable_detect(hwif);
1401 static ssize_t store_delete_devices(struct device *portdev,
1402 struct device_attribute *attr,
1403 const char *buf, size_t n)
1405 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1407 if (strncmp(buf, "1", n))
1410 ide_port_unregister_devices(hwif);
1415 static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1417 static ssize_t store_scan(struct device *portdev,
1418 struct device_attribute *attr,
1419 const char *buf, size_t n)
1421 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1423 if (strncmp(buf, "1", n))
1426 ide_port_unregister_devices(hwif);
1427 ide_port_scan(hwif);
1432 static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1434 static struct device_attribute *ide_port_attrs[] = {
1435 &dev_attr_delete_devices,
1440 static int ide_sysfs_register_port(ide_hwif_t *hwif)
1444 for (i = 0; ide_port_attrs[i]; i++) {
1445 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1454 * ide_find_port_slot - find free ide_hwifs[] slot
1457 * Return the new hwif. If we are out of free slots return NULL.
1460 ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d)
1464 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1467 * Claim an unassigned slot.
1469 * Give preference to claiming other slots before claiming ide0/ide1,
1470 * just in case there's another interface yet-to-be-scanned
1471 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1473 * Unless there is a bootable card that does not use the standard
1474 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1477 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1479 for (; i < MAX_HWIFS; i++) {
1480 hwif = &ide_hwifs[i];
1481 if (hwif->chipset == ide_unknown)
1485 for (i = 2; i < MAX_HWIFS; i++) {
1486 hwif = &ide_hwifs[i];
1487 if (hwif->chipset == ide_unknown)
1490 for (i = 0; i < 2 && i < MAX_HWIFS; i++) {
1491 hwif = &ide_hwifs[i];
1492 if (hwif->chipset == ide_unknown)
1499 EXPORT_SYMBOL_GPL(ide_find_port_slot);
1501 int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
1503 ide_hwif_t *hwif, *mate = NULL;
1506 for (i = 0; i < MAX_HWIFS; i++) {
1507 if (idx[i] == 0xff) {
1512 hwif = &ide_hwifs[idx[i]];
1514 ide_port_apply_params(hwif);
1521 if (d->chipset != ide_etrax100 && (i & 1) && mate) {
1526 mate = (i & 1) ? NULL : hwif;
1528 ide_init_port(hwif, i & 1, d);
1529 ide_port_cable_detect(hwif);
1530 ide_port_init_devices(hwif);
1533 for (i = 0; i < MAX_HWIFS; i++) {
1537 hwif = &ide_hwifs[idx[i]];
1539 if (ide_probe_port(hwif) == 0)
1542 if (hwif->chipset != ide_4drives || !hwif->mate ||
1543 !hwif->mate->present)
1544 ide_register_port(hwif);
1547 ide_port_tune_devices(hwif);
1550 for (i = 0; i < MAX_HWIFS; i++) {
1554 hwif = &ide_hwifs[idx[i]];
1556 if (hwif_init(hwif) == 0) {
1557 printk(KERN_INFO "%s: failed to initialize IDE "
1558 "interface\n", hwif->name);
1565 ide_port_setup_devices(hwif);
1567 ide_acpi_init(hwif);
1570 ide_acpi_port_init_devices(hwif);
1573 for (i = 0; i < MAX_HWIFS; i++) {
1577 hwif = &ide_hwifs[idx[i]];
1579 if (hwif->chipset == ide_unknown)
1580 hwif->chipset = ide_generic;
1583 hwif_register_devices(hwif);
1586 for (i = 0; i < MAX_HWIFS; i++) {
1590 hwif = &ide_hwifs[idx[i]];
1592 ide_sysfs_register_port(hwif);
1593 ide_proc_register_port(hwif);
1596 ide_proc_port_register_devices(hwif);
1601 EXPORT_SYMBOL_GPL(ide_device_add_all);
1603 int ide_device_add(u8 idx[4], const struct ide_port_info *d)
1605 u8 idx_all[MAX_HWIFS];
1608 for (i = 0; i < MAX_HWIFS; i++)
1609 idx_all[i] = (i < 4) ? idx[i] : 0xff;
1611 return ide_device_add_all(idx_all, d);
1613 EXPORT_SYMBOL_GPL(ide_device_add);
1615 void ide_port_scan(ide_hwif_t *hwif)
1617 ide_port_apply_params(hwif);
1618 ide_port_cable_detect(hwif);
1619 ide_port_init_devices(hwif);
1621 if (ide_probe_port(hwif) < 0)
1626 ide_port_tune_devices(hwif);
1627 ide_acpi_port_init_devices(hwif);
1628 ide_port_setup_devices(hwif);
1629 hwif_register_devices(hwif);
1630 ide_proc_port_register_devices(hwif);
1632 EXPORT_SYMBOL_GPL(ide_port_scan);
1634 static void ide_legacy_init_one(u8 *idx, hw_regs_t *hw, u8 port_no,
1635 const struct ide_port_info *d,
1636 unsigned long config)
1639 unsigned long base, ctl;
1652 if (!request_region(base, 8, d->name)) {
1653 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
1654 d->name, base, base + 7);
1658 if (!request_region(ctl, 1, d->name)) {
1659 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
1661 release_region(base, 8);
1665 ide_std_init_ports(hw, base, ctl);
1668 hwif = ide_find_port_slot(d);
1670 ide_init_port_hw(hwif, hw);
1672 hwif->config_data = config;
1673 idx[port_no] = hwif->index;
1677 int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
1679 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
1682 memset(&hw, 0, sizeof(hw));
1684 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
1685 ide_legacy_init_one(idx, &hw[0], 0, d, config);
1686 ide_legacy_init_one(idx, &hw[1], 1, d, config);
1688 if (idx[0] == 0xff && idx[1] == 0xff &&
1689 (d->host_flags & IDE_HFLAG_SINGLE))
1692 ide_device_add(idx, d);
1696 EXPORT_SYMBOL_GPL(ide_legacy_device_add);