2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
30 void SELECT_DRIVE(ide_drive_t *drive)
32 ide_hwif_t *hwif = drive->hwif;
33 const struct ide_port_ops *port_ops = hwif->port_ops;
36 if (port_ops && port_ops->selectproc)
37 port_ops->selectproc(drive);
39 memset(&task, 0, sizeof(task));
40 task.tf_flags = IDE_TFLAG_OUT_DEVICE;
42 drive->hwif->tp_ops->tf_load(drive, &task);
45 void SELECT_MASK(ide_drive_t *drive, int mask)
47 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
49 if (port_ops && port_ops->maskproc)
50 port_ops->maskproc(drive, mask);
53 u8 ide_read_error(ide_drive_t *drive)
57 memset(&task, 0, sizeof(task));
58 task.tf_flags = IDE_TFLAG_IN_FEATURE;
60 drive->hwif->tp_ops->tf_read(drive, &task);
64 EXPORT_SYMBOL_GPL(ide_read_error);
66 void ide_fix_driveid(u16 *id)
68 #ifndef __LITTLE_ENDIAN
72 for (i = 0; i < 256; i++)
73 id[i] = __le16_to_cpu(id[i]);
75 # error "Please fix <asm/byteorder.h>"
81 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
82 * removing leading/trailing blanks and compressing internal blanks.
83 * It is primarily used to tidy up the model name/number fields as
84 * returned by the ATA_CMD_ID_ATA[PI] commands.
87 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
89 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
92 /* convert from big-endian to host byte order */
93 for (p = s ; p != end ; p += 2)
94 be16_to_cpus((u16 *) p);
97 /* strip leading blanks */
99 while (s != end && *s == ' ')
101 /* compress internal blanks and strip trailing blanks */
102 while (s != end && *s) {
103 if (*s++ != ' ' || (s != end && *s && *s != ' '))
106 /* wipe out trailing garbage */
110 EXPORT_SYMBOL(ide_fixstring);
113 * This routine busy-waits for the drive status to be not "busy".
114 * It then checks the status for all of the "good" bits and none
115 * of the "bad" bits, and if all is okay it returns 0. All other
116 * cases return error -- caller may then invoke ide_error().
118 * This routine should get fixed to not hog the cpu during extra long waits..
119 * That could be done by busy-waiting for the first jiffy or two, and then
120 * setting a timer to wake up at half second intervals thereafter,
121 * until timeout is achieved, before timing out.
123 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
124 unsigned long timeout, u8 *rstat)
126 ide_hwif_t *hwif = drive->hwif;
127 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
132 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
133 stat = tp_ops->read_status(hwif);
135 if (stat & ATA_BUSY) {
136 local_save_flags(flags);
137 local_irq_enable_in_hardirq();
139 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
140 if (time_after(jiffies, timeout)) {
142 * One last read after the timeout in case
143 * heavy interrupt load made us not make any
144 * progress during the timeout..
146 stat = tp_ops->read_status(hwif);
147 if ((stat & ATA_BUSY) == 0)
150 local_irq_restore(flags);
155 local_irq_restore(flags);
158 * Allow status to settle, then read it again.
159 * A few rare drives vastly violate the 400ns spec here,
160 * so we'll wait up to 10usec for a "good" status
161 * rather than expensively fail things immediately.
162 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
164 for (i = 0; i < 10; i++) {
166 stat = tp_ops->read_status(hwif);
168 if (OK_STAT(stat, good, bad)) {
178 * In case of error returns error value after doing "*startstop = ide_error()".
179 * The caller should return the updated value of "startstop" in this case,
180 * "startstop" is unchanged when the function returns 0.
182 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
183 u8 bad, unsigned long timeout)
188 /* bail early if we've exceeded max_failures */
189 if (drive->max_failures && (drive->failures > drive->max_failures)) {
190 *startstop = ide_stopped;
194 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
197 char *s = (err == -EBUSY) ? "status timeout" : "status error";
198 *startstop = ide_error(drive, s, stat);
203 EXPORT_SYMBOL(ide_wait_stat);
206 * ide_in_drive_list - look for drive in black/white list
207 * @id: drive identifier
208 * @table: list to inspect
210 * Look for a drive in the blacklist and the whitelist tables
211 * Returns 1 if the drive is found in the table.
214 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
216 for ( ; table->id_model; table++)
217 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
218 (!table->id_firmware ||
219 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
223 EXPORT_SYMBOL_GPL(ide_in_drive_list);
226 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
227 * We list them here and depend on the device side cable detection for them.
229 * Some optical devices with the buggy firmwares have the same problem.
231 static const struct drive_list_entry ivb_list[] = {
232 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
233 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
234 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
235 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
236 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
237 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
238 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
239 { "SAMSUNG SP0822N" , "WA100-10" },
244 * All hosts that use the 80c ribbon must use!
245 * The name is derived from upper byte of word 93 and the 80c ribbon.
247 u8 eighty_ninty_three(ide_drive_t *drive)
249 ide_hwif_t *hwif = drive->hwif;
251 int ivb = ide_in_drive_list(id, ivb_list);
253 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
257 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
260 if (ata_id_is_sata(id) && !ivb)
263 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
268 * - change master/slave IDENTIFY order
269 * - force bit13 (80c cable present) check also for !ivb devices
270 * (unless the slave device is pre-ATA3)
272 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
273 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
277 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
280 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
281 "limiting max speed to UDMA33\n",
283 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
285 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
290 int ide_driveid_update(ide_drive_t *drive)
292 ide_hwif_t *hwif = drive->hwif;
293 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
299 * Re-read drive->id for possible DMA mode
300 * change (copied from ide-probe.c)
303 SELECT_MASK(drive, 1);
304 tp_ops->set_irq(hwif, 0);
306 tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
308 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
309 SELECT_MASK(drive, 0);
313 msleep(50); /* wait for IRQ and ATA_DRQ */
314 stat = tp_ops->read_status(hwif);
316 if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
317 SELECT_MASK(drive, 0);
318 printk("%s: CHECK for good STATUS\n", drive->name);
321 local_irq_save(flags);
322 SELECT_MASK(drive, 0);
323 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
325 local_irq_restore(flags);
328 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
329 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
331 local_irq_restore(flags);
334 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
335 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
336 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
337 /* anything more ? */
341 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
347 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
349 ide_hwif_t *hwif = drive->hwif;
350 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
351 u16 *id = drive->id, i;
356 #ifdef CONFIG_BLK_DEV_IDEDMA
357 if (hwif->dma_ops) /* check if host supports DMA */
358 hwif->dma_ops->dma_host_set(drive, 0);
361 /* Skip setting PIO flow-control modes on pre-EIDE drives */
362 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
366 * Don't use ide_wait_cmd here - it will
367 * attempt to set_geometry and recalibrate,
368 * but for some reason these don't work at
369 * this point (lost interrupt).
373 * FIXME: we race against the running IRQ here if
374 * this is called from non IRQ context. If we use
375 * disable_irq() we hang on the error path. Work
378 disable_irq_nosync(hwif->irq);
382 SELECT_MASK(drive, 1);
384 tp_ops->set_irq(hwif, 0);
386 memset(&task, 0, sizeof(task));
387 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
388 task.tf.feature = SETFEATURES_XFER;
389 task.tf.nsect = speed;
391 tp_ops->tf_load(drive, &task);
393 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
395 if (drive->quirk_list == 2)
396 tp_ops->set_irq(hwif, 1);
398 error = __ide_wait_stat(drive, drive->ready_stat,
399 ATA_BUSY | ATA_DRQ | ATA_ERR,
402 SELECT_MASK(drive, 0);
404 enable_irq(hwif->irq);
407 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
411 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
412 id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
413 id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
416 #ifdef CONFIG_BLK_DEV_IDEDMA
417 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
418 hwif->dma_ops->dma_host_set(drive, 1);
419 else if (hwif->dma_ops) /* check if host supports DMA */
420 ide_dma_off_quietly(drive);
423 if (speed >= XFER_UDMA_0) {
424 i = 1 << (speed - XFER_UDMA_0);
425 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
426 } else if (speed >= XFER_MW_DMA_0) {
427 i = 1 << (speed - XFER_MW_DMA_0);
428 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
429 } else if (speed >= XFER_SW_DMA_0) {
430 i = 1 << (speed - XFER_SW_DMA_0);
431 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
434 if (!drive->init_speed)
435 drive->init_speed = speed;
436 drive->current_speed = speed;
441 * This should get invoked any time we exit the driver to
442 * wait for an interrupt response from a drive. handler() points
443 * at the appropriate code to handle the next interrupt, and a
444 * timer is started to prevent us from waiting forever in case
445 * something goes wrong (see the ide_timer_expiry() handler later on).
447 * See also ide_execute_command
449 static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
450 unsigned int timeout, ide_expiry_t *expiry)
452 ide_hwif_t *hwif = drive->hwif;
454 BUG_ON(hwif->handler);
455 hwif->handler = handler;
456 hwif->expiry = expiry;
457 hwif->timer.expires = jiffies + timeout;
458 hwif->req_gen_timer = hwif->req_gen;
459 add_timer(&hwif->timer);
462 void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
463 unsigned int timeout, ide_expiry_t *expiry)
465 ide_hwif_t *hwif = drive->hwif;
468 spin_lock_irqsave(&hwif->lock, flags);
469 __ide_set_handler(drive, handler, timeout, expiry);
470 spin_unlock_irqrestore(&hwif->lock, flags);
472 EXPORT_SYMBOL(ide_set_handler);
475 * ide_execute_command - execute an IDE command
476 * @drive: IDE drive to issue the command against
477 * @command: command byte to write
478 * @handler: handler for next phase
479 * @timeout: timeout for command
480 * @expiry: handler to run on timeout
482 * Helper function to issue an IDE command. This handles the
483 * atomicity requirements, command timing and ensures that the
484 * handler and IRQ setup do not race. All IDE command kick off
485 * should go via this function or do equivalent locking.
488 void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
489 unsigned timeout, ide_expiry_t *expiry)
491 ide_hwif_t *hwif = drive->hwif;
494 spin_lock_irqsave(&hwif->lock, flags);
495 __ide_set_handler(drive, handler, timeout, expiry);
496 hwif->tp_ops->exec_command(hwif, cmd);
498 * Drive takes 400nS to respond, we must avoid the IRQ being
499 * serviced before that.
501 * FIXME: we could skip this delay with care on non shared devices
504 spin_unlock_irqrestore(&hwif->lock, flags);
506 EXPORT_SYMBOL(ide_execute_command);
508 void ide_execute_pkt_cmd(ide_drive_t *drive)
510 ide_hwif_t *hwif = drive->hwif;
513 spin_lock_irqsave(&hwif->lock, flags);
514 hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
516 spin_unlock_irqrestore(&hwif->lock, flags);
518 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
520 static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
522 struct request *rq = drive->hwif->rq;
524 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
525 ide_end_request(drive, err ? err : 1, 0);
529 static ide_startstop_t do_reset1(ide_drive_t *, int);
532 * atapi_reset_pollfunc() gets invoked to poll the interface for completion
533 * every 50ms during an atapi drive reset operation. If the drive has not yet
534 * responded, and we have not yet hit our maximum waiting time, then the timer
535 * is restarted for another 50ms.
537 static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
539 ide_hwif_t *hwif = drive->hwif;
544 stat = hwif->tp_ops->read_status(hwif);
546 if (OK_STAT(stat, 0, ATA_BUSY))
547 printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
549 if (time_before(jiffies, hwif->poll_timeout)) {
550 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
552 /* continue polling */
557 printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
559 /* do it the old fashioned way */
560 return do_reset1(drive, 1);
564 ide_complete_drive_reset(drive, 0);
568 static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
570 static const char *err_master_vals[] =
571 { NULL, "passed", "formatter device error",
572 "sector buffer error", "ECC circuitry error",
573 "controlling MPU error" };
575 u8 err_master = err & 0x7f;
577 printk(KERN_ERR "%s: reset: master: ", hwif->name);
578 if (err_master && err_master < 6)
579 printk(KERN_CONT "%s", err_master_vals[err_master]);
581 printk(KERN_CONT "error (0x%02x?)", err);
583 printk(KERN_CONT "; slave: failed");
584 printk(KERN_CONT "\n");
588 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
589 * during an ide reset operation. If the drives have not yet responded,
590 * and we have not yet hit our maximum waiting time, then the timer is restarted
593 static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
595 ide_hwif_t *hwif = drive->hwif;
596 const struct ide_port_ops *port_ops = hwif->port_ops;
600 if (port_ops && port_ops->reset_poll) {
601 err = port_ops->reset_poll(drive);
603 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
604 hwif->name, drive->name);
609 tmp = hwif->tp_ops->read_status(hwif);
611 if (!OK_STAT(tmp, 0, ATA_BUSY)) {
612 if (time_before(jiffies, hwif->poll_timeout)) {
613 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
614 /* continue polling */
617 printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
622 tmp = ide_read_error(drive);
625 printk(KERN_INFO "%s: reset: success\n", hwif->name);
628 ide_reset_report_error(hwif, tmp);
634 hwif->polling = 0; /* done polling */
635 ide_complete_drive_reset(drive, err);
639 static void ide_disk_pre_reset(ide_drive_t *drive)
641 int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
643 drive->special.all = 0;
644 drive->special.b.set_geometry = legacy;
645 drive->special.b.recalibrate = legacy;
647 drive->mult_count = 0;
648 drive->dev_flags &= ~IDE_DFLAG_PARKED;
650 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
651 (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
654 if (drive->mult_req != drive->mult_count)
655 drive->special.b.set_multmode = 1;
658 static void pre_reset(ide_drive_t *drive)
660 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
662 if (drive->media == ide_disk)
663 ide_disk_pre_reset(drive);
665 drive->dev_flags |= IDE_DFLAG_POST_RESET;
667 if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
668 if (drive->crc_count)
669 ide_check_dma_crc(drive);
674 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
675 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
676 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
682 if (port_ops && port_ops->pre_reset)
683 port_ops->pre_reset(drive);
685 if (drive->current_speed != 0xff)
686 drive->desired_speed = drive->current_speed;
687 drive->current_speed = 0xff;
691 * do_reset1() attempts to recover a confused drive by resetting it.
692 * Unfortunately, resetting a disk drive actually resets all devices on
693 * the same interface, so it can really be thought of as resetting the
694 * interface rather than resetting the drive.
696 * ATAPI devices have their own reset mechanism which allows them to be
697 * individually reset without clobbering other devices on the same interface.
699 * Unfortunately, the IDE interface does not generate an interrupt to let
700 * us know when the reset operation has finished, so we must poll for this.
701 * Equally poor, though, is the fact that this may a very long time to complete,
702 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
703 * we set a timer to poll at 50ms intervals.
705 static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
707 ide_hwif_t *hwif = drive->hwif;
708 struct ide_io_ports *io_ports = &hwif->io_ports;
709 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
710 const struct ide_port_ops *port_ops;
712 unsigned long flags, timeout;
716 spin_lock_irqsave(&hwif->lock, flags);
718 /* We must not reset with running handlers */
719 BUG_ON(hwif->handler != NULL);
721 /* For an ATAPI device, first try an ATAPI SRST. */
722 if (drive->media != ide_disk && !do_not_try_atapi) {
726 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
728 hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
730 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
731 spin_unlock_irqrestore(&hwif->lock, flags);
735 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
739 prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
741 ide_port_for_each_present_dev(i, tdrive, hwif) {
742 if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
743 time_after(tdrive->sleep, timeout))
744 timeout = tdrive->sleep;
748 if (time_before_eq(timeout, now))
751 spin_unlock_irqrestore(&hwif->lock, flags);
752 timeout = schedule_timeout_uninterruptible(timeout - now);
753 spin_lock_irqsave(&hwif->lock, flags);
755 finish_wait(&ide_park_wq, &wait);
758 * First, reset any device state data we were maintaining
759 * for any of the drives on this interface.
761 ide_port_for_each_dev(i, tdrive, hwif)
764 if (io_ports->ctl_addr == 0) {
765 spin_unlock_irqrestore(&hwif->lock, flags);
766 ide_complete_drive_reset(drive, -ENXIO);
771 * Note that we also set nIEN while resetting the device,
772 * to mask unwanted interrupts from the interface during the reset.
773 * However, due to the design of PC hardware, this will cause an
774 * immediate interrupt due to the edge transition it produces.
775 * This single interrupt gives us a "fast poll" for drives that
776 * recover from reset very quickly, saving us the first 50ms wait time.
778 * TODO: add ->softreset method and stop abusing ->set_irq
780 /* set SRST and nIEN */
781 tp_ops->set_irq(hwif, 4);
782 /* more than enough time */
784 /* clear SRST, leave nIEN (unless device is on the quirk list) */
785 tp_ops->set_irq(hwif, drive->quirk_list == 2);
786 /* more than enough time */
788 hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
790 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
793 * Some weird controller like resetting themselves to a strange
794 * state when the disks are reset this way. At least, the Winbond
795 * 553 documentation says that
797 port_ops = hwif->port_ops;
798 if (port_ops && port_ops->resetproc)
799 port_ops->resetproc(drive);
801 spin_unlock_irqrestore(&hwif->lock, flags);
806 * ide_do_reset() is the entry point to the drive/interface reset code.
809 ide_startstop_t ide_do_reset(ide_drive_t *drive)
811 return do_reset1(drive, 0);
813 EXPORT_SYMBOL(ide_do_reset);
816 * ide_wait_not_busy() waits for the currently selected device on the hwif
817 * to report a non-busy status, see comments in ide_probe_port().
819 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
825 * Turn this into a schedule() sleep once I'm sure
826 * about locking issues (2.5 work ?).
829 stat = hwif->tp_ops->read_status(hwif);
830 if ((stat & ATA_BUSY) == 0)
833 * Assume a value of 0xff means nothing is connected to
834 * the interface and it doesn't implement the pull-down
839 touch_softlockup_watchdog();
840 touch_nmi_watchdog();