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 */
111 EXPORT_SYMBOL(ide_fixstring
);
114 * This routine busy-waits for the drive status to be not "busy".
115 * It then checks the status for all of the "good" bits and none
116 * of the "bad" bits, and if all is okay it returns 0. All other
117 * cases return error -- caller may then invoke ide_error().
119 * This routine should get fixed to not hog the cpu during extra long waits..
120 * That could be done by busy-waiting for the first jiffy or two, and then
121 * setting a timer to wake up at half second intervals thereafter,
122 * until timeout is achieved, before timing out.
124 static int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
, 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
, u8 bad
, unsigned long timeout
)
187 /* bail early if we've exceeded max_failures */
188 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
189 *startstop
= ide_stopped
;
193 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
196 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
197 *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
)))
224 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
227 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
228 * We list them here and depend on the device side cable detection for them.
230 * Some optical devices with the buggy firmwares have the same problem.
232 static const struct drive_list_entry ivb_list
[] = {
233 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
234 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
235 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
236 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
237 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
238 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
239 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
240 { "SAMSUNG SP0822N" , "WA100-10" },
245 * All hosts that use the 80c ribbon must use!
246 * The name is derived from upper byte of word 93 and the 80c ribbon.
248 u8
eighty_ninty_three (ide_drive_t
*drive
)
250 ide_hwif_t
*hwif
= drive
->hwif
;
252 int ivb
= ide_in_drive_list(id
, ivb_list
);
254 if (hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
258 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
261 if (ata_id_is_sata(id
) && !ivb
)
264 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
269 * - change master/slave IDENTIFY order
270 * - force bit13 (80c cable present) check also for !ivb devices
271 * (unless the slave device is pre-ATA3)
273 if ((id
[ATA_ID_HW_CONFIG
] & 0x4000) ||
274 (ivb
&& (id
[ATA_ID_HW_CONFIG
] & 0x2000)))
278 if (drive
->dev_flags
& IDE_DFLAG_UDMA33_WARNED
)
281 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
282 "limiting max speed to UDMA33\n",
284 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
286 drive
->dev_flags
|= IDE_DFLAG_UDMA33_WARNED
;
291 int ide_driveid_update(ide_drive_t
*drive
)
293 ide_hwif_t
*hwif
= drive
->hwif
;
294 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
300 * Re-read drive->id for possible DMA mode
301 * change (copied from ide-probe.c)
304 SELECT_MASK(drive
, 1);
305 tp_ops
->set_irq(hwif
, 0);
307 tp_ops
->exec_command(hwif
, ATA_CMD_ID_ATA
);
309 if (ide_busy_sleep(hwif
, WAIT_WORSTCASE
, 1)) {
310 SELECT_MASK(drive
, 0);
314 msleep(50); /* wait for IRQ and ATA_DRQ */
315 stat
= tp_ops
->read_status(hwif
);
317 if (!OK_STAT(stat
, ATA_DRQ
, BAD_R_STAT
)) {
318 SELECT_MASK(drive
, 0);
319 printk("%s: CHECK for good STATUS\n", drive
->name
);
322 local_irq_save(flags
);
323 SELECT_MASK(drive
, 0);
324 id
= kmalloc(SECTOR_SIZE
, GFP_ATOMIC
);
326 local_irq_restore(flags
);
329 tp_ops
->input_data(drive
, NULL
, id
, SECTOR_SIZE
);
330 (void)tp_ops
->read_status(hwif
); /* clear drive IRQ */
332 local_irq_restore(flags
);
335 drive
->id
[ATA_ID_UDMA_MODES
] = id
[ATA_ID_UDMA_MODES
];
336 drive
->id
[ATA_ID_MWDMA_MODES
] = id
[ATA_ID_MWDMA_MODES
];
337 drive
->id
[ATA_ID_SWDMA_MODES
] = id
[ATA_ID_SWDMA_MODES
];
338 /* anything more ? */
342 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) && ide_id_dma_bug(drive
))
348 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
350 ide_hwif_t
*hwif
= drive
->hwif
;
351 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
352 u16
*id
= drive
->id
, i
;
357 #ifdef CONFIG_BLK_DEV_IDEDMA
358 if (hwif
->dma_ops
) /* check if host supports DMA */
359 hwif
->dma_ops
->dma_host_set(drive
, 0);
362 /* Skip setting PIO flow-control modes on pre-EIDE drives */
363 if ((speed
& 0xf8) == XFER_PIO_0
&& ata_id_has_iordy(drive
->id
) == 0)
367 * Don't use ide_wait_cmd here - it will
368 * attempt to set_geometry and recalibrate,
369 * but for some reason these don't work at
370 * this point (lost interrupt).
374 * FIXME: we race against the running IRQ here if
375 * this is called from non IRQ context. If we use
376 * disable_irq() we hang on the error path. Work
379 disable_irq_nosync(hwif
->irq
);
383 SELECT_MASK(drive
, 1);
385 tp_ops
->set_irq(hwif
, 0);
387 memset(&task
, 0, sizeof(task
));
388 task
.tf_flags
= IDE_TFLAG_OUT_FEATURE
| IDE_TFLAG_OUT_NSECT
;
389 task
.tf
.feature
= SETFEATURES_XFER
;
390 task
.tf
.nsect
= speed
;
392 tp_ops
->tf_load(drive
, &task
);
394 tp_ops
->exec_command(hwif
, ATA_CMD_SET_FEATURES
);
396 if (drive
->quirk_list
== 2)
397 tp_ops
->set_irq(hwif
, 1);
399 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
400 ATA_BUSY
| ATA_DRQ
| ATA_ERR
,
403 SELECT_MASK(drive
, 0);
405 enable_irq(hwif
->irq
);
408 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
412 id
[ATA_ID_UDMA_MODES
] &= ~0xFF00;
413 id
[ATA_ID_MWDMA_MODES
] &= ~0x0F00;
414 id
[ATA_ID_SWDMA_MODES
] &= ~0x0F00;
417 #ifdef CONFIG_BLK_DEV_IDEDMA
418 if (speed
>= XFER_SW_DMA_0
&& (drive
->dev_flags
& IDE_DFLAG_USING_DMA
))
419 hwif
->dma_ops
->dma_host_set(drive
, 1);
420 else if (hwif
->dma_ops
) /* check if host supports DMA */
421 ide_dma_off_quietly(drive
);
424 if (speed
>= XFER_UDMA_0
) {
425 i
= 1 << (speed
- XFER_UDMA_0
);
426 id
[ATA_ID_UDMA_MODES
] |= (i
<< 8 | i
);
427 } else if (speed
>= XFER_MW_DMA_0
) {
428 i
= 1 << (speed
- XFER_MW_DMA_0
);
429 id
[ATA_ID_MWDMA_MODES
] |= (i
<< 8 | i
);
430 } else if (speed
>= XFER_SW_DMA_0
) {
431 i
= 1 << (speed
- XFER_SW_DMA_0
);
432 id
[ATA_ID_SWDMA_MODES
] |= (i
<< 8 | i
);
435 if (!drive
->init_speed
)
436 drive
->init_speed
= speed
;
437 drive
->current_speed
= speed
;
442 * This should get invoked any time we exit the driver to
443 * wait for an interrupt response from a drive. handler() points
444 * at the appropriate code to handle the next interrupt, and a
445 * timer is started to prevent us from waiting forever in case
446 * something goes wrong (see the ide_timer_expiry() handler later on).
448 * See also ide_execute_command
450 static void __ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
451 unsigned int timeout
, ide_expiry_t
*expiry
)
453 ide_hwif_t
*hwif
= drive
->hwif
;
455 BUG_ON(hwif
->handler
);
456 hwif
->handler
= handler
;
457 hwif
->expiry
= expiry
;
458 hwif
->timer
.expires
= jiffies
+ timeout
;
459 hwif
->req_gen_timer
= hwif
->req_gen
;
460 add_timer(&hwif
->timer
);
463 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
464 unsigned int timeout
, ide_expiry_t
*expiry
)
466 ide_hwif_t
*hwif
= drive
->hwif
;
469 spin_lock_irqsave(&hwif
->lock
, flags
);
470 __ide_set_handler(drive
, handler
, timeout
, expiry
);
471 spin_unlock_irqrestore(&hwif
->lock
, flags
);
474 EXPORT_SYMBOL(ide_set_handler
);
477 * ide_execute_command - execute an IDE command
478 * @drive: IDE drive to issue the command against
479 * @command: command byte to write
480 * @handler: handler for next phase
481 * @timeout: timeout for command
482 * @expiry: handler to run on timeout
484 * Helper function to issue an IDE command. This handles the
485 * atomicity requirements, command timing and ensures that the
486 * handler and IRQ setup do not race. All IDE command kick off
487 * should go via this function or do equivalent locking.
490 void ide_execute_command(ide_drive_t
*drive
, u8 cmd
, ide_handler_t
*handler
,
491 unsigned timeout
, ide_expiry_t
*expiry
)
493 ide_hwif_t
*hwif
= drive
->hwif
;
496 spin_lock_irqsave(&hwif
->lock
, flags
);
497 __ide_set_handler(drive
, handler
, timeout
, expiry
);
498 hwif
->tp_ops
->exec_command(hwif
, cmd
);
500 * Drive takes 400nS to respond, we must avoid the IRQ being
501 * serviced before that.
503 * FIXME: we could skip this delay with care on non shared devices
506 spin_unlock_irqrestore(&hwif
->lock
, flags
);
508 EXPORT_SYMBOL(ide_execute_command
);
510 void ide_execute_pkt_cmd(ide_drive_t
*drive
)
512 ide_hwif_t
*hwif
= drive
->hwif
;
515 spin_lock_irqsave(&hwif
->lock
, flags
);
516 hwif
->tp_ops
->exec_command(hwif
, ATA_CMD_PACKET
);
518 spin_unlock_irqrestore(&hwif
->lock
, flags
);
520 EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd
);
522 static inline void ide_complete_drive_reset(ide_drive_t
*drive
, int err
)
524 struct request
*rq
= drive
->hwif
->rq
;
526 if (rq
&& blk_special_request(rq
) && rq
->cmd
[0] == REQ_DRIVE_RESET
)
527 ide_end_request(drive
, err
? err
: 1, 0);
531 static ide_startstop_t
do_reset1 (ide_drive_t
*, int);
534 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
535 * during an atapi drive reset operation. If the drive has not yet responded,
536 * and we have not yet hit our maximum waiting time, then the timer is restarted
539 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
541 ide_hwif_t
*hwif
= drive
->hwif
;
546 stat
= hwif
->tp_ops
->read_status(hwif
);
548 if (OK_STAT(stat
, 0, ATA_BUSY
))
549 printk(KERN_INFO
"%s: ATAPI reset complete\n", drive
->name
);
551 if (time_before(jiffies
, hwif
->poll_timeout
)) {
552 ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
553 /* continue polling */
558 printk(KERN_ERR
"%s: ATAPI reset timed-out, status=0x%02x\n",
560 /* do it the old fashioned way */
561 return do_reset1(drive
, 1);
565 ide_complete_drive_reset(drive
, 0);
569 static void ide_reset_report_error(ide_hwif_t
*hwif
, u8 err
)
571 static const char *err_master_vals
[] =
572 { NULL
, "passed", "formatter device error",
573 "sector buffer error", "ECC circuitry error",
574 "controlling MPU error" };
576 u8 err_master
= err
& 0x7f;
578 printk(KERN_ERR
"%s: reset: master: ", hwif
->name
);
579 if (err_master
&& err_master
< 6)
580 printk(KERN_CONT
"%s", err_master_vals
[err_master
]);
582 printk(KERN_CONT
"error (0x%02x?)", err
);
584 printk(KERN_CONT
"; slave: failed");
585 printk(KERN_CONT
"\n");
589 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
590 * during an ide reset operation. If the drives have not yet responded,
591 * and we have not yet hit our maximum waiting time, then the timer is restarted
594 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
596 ide_hwif_t
*hwif
= drive
->hwif
;
597 const struct ide_port_ops
*port_ops
= hwif
->port_ops
;
601 if (port_ops
&& port_ops
->reset_poll
) {
602 err
= port_ops
->reset_poll(drive
);
604 printk(KERN_ERR
"%s: host reset_poll failure for %s.\n",
605 hwif
->name
, drive
->name
);
610 tmp
= hwif
->tp_ops
->read_status(hwif
);
612 if (!OK_STAT(tmp
, 0, ATA_BUSY
)) {
613 if (time_before(jiffies
, hwif
->poll_timeout
)) {
614 ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
615 /* continue polling */
618 printk(KERN_ERR
"%s: reset timed-out, status=0x%02x\n",
623 tmp
= ide_read_error(drive
);
626 printk(KERN_INFO
"%s: reset: success\n", hwif
->name
);
629 ide_reset_report_error(hwif
, tmp
);
635 hwif
->polling
= 0; /* done polling */
636 ide_complete_drive_reset(drive
, err
);
640 static void ide_disk_pre_reset(ide_drive_t
*drive
)
642 int legacy
= (drive
->id
[ATA_ID_CFS_ENABLE_2
] & 0x0400) ? 0 : 1;
644 drive
->special
.all
= 0;
645 drive
->special
.b
.set_geometry
= legacy
;
646 drive
->special
.b
.recalibrate
= legacy
;
648 drive
->mult_count
= 0;
649 drive
->dev_flags
&= ~IDE_DFLAG_PARKED
;
651 if ((drive
->dev_flags
& IDE_DFLAG_KEEP_SETTINGS
) == 0 &&
652 (drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0)
655 if (drive
->mult_req
!= drive
->mult_count
)
656 drive
->special
.b
.set_multmode
= 1;
659 static void pre_reset(ide_drive_t
*drive
)
661 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
663 if (drive
->media
== ide_disk
)
664 ide_disk_pre_reset(drive
);
666 drive
->dev_flags
|= IDE_DFLAG_POST_RESET
;
668 if (drive
->dev_flags
& IDE_DFLAG_USING_DMA
) {
669 if (drive
->crc_count
)
670 ide_check_dma_crc(drive
);
675 if ((drive
->dev_flags
& IDE_DFLAG_KEEP_SETTINGS
) == 0) {
676 if ((drive
->dev_flags
& IDE_DFLAG_USING_DMA
) == 0) {
677 drive
->dev_flags
&= ~IDE_DFLAG_UNMASK
;
683 if (port_ops
&& port_ops
->pre_reset
)
684 port_ops
->pre_reset(drive
);
686 if (drive
->current_speed
!= 0xff)
687 drive
->desired_speed
= drive
->current_speed
;
688 drive
->current_speed
= 0xff;
692 * do_reset1() attempts to recover a confused drive by resetting it.
693 * Unfortunately, resetting a disk drive actually resets all devices on
694 * the same interface, so it can really be thought of as resetting the
695 * interface rather than resetting the drive.
697 * ATAPI devices have their own reset mechanism which allows them to be
698 * individually reset without clobbering other devices on the same interface.
700 * Unfortunately, the IDE interface does not generate an interrupt to let
701 * us know when the reset operation has finished, so we must poll for this.
702 * Equally poor, though, is the fact that this may a very long time to complete,
703 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
704 * we set a timer to poll at 50ms intervals.
706 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
708 ide_hwif_t
*hwif
= drive
->hwif
;
709 struct ide_io_ports
*io_ports
= &hwif
->io_ports
;
710 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
711 const struct ide_port_ops
*port_ops
;
713 unsigned long flags
, timeout
;
717 spin_lock_irqsave(&hwif
->lock
, flags
);
719 /* We must not reset with running handlers */
720 BUG_ON(hwif
->handler
!= NULL
);
722 /* For an ATAPI device, first try an ATAPI SRST. */
723 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
727 tp_ops
->exec_command(hwif
, ATA_CMD_DEV_RESET
);
729 hwif
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
731 __ide_set_handler(drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
732 spin_unlock_irqrestore(&hwif
->lock
, flags
);
736 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
740 prepare_to_wait(&ide_park_wq
, &wait
, TASK_UNINTERRUPTIBLE
);
742 ide_port_for_each_present_dev(i
, tdrive
, hwif
) {
743 if ((tdrive
->dev_flags
& IDE_DFLAG_PARKED
) &&
744 time_after(tdrive
->sleep
, timeout
))
745 timeout
= tdrive
->sleep
;
749 if (time_before_eq(timeout
, now
))
752 spin_unlock_irqrestore(&hwif
->lock
, flags
);
753 timeout
= schedule_timeout_uninterruptible(timeout
- now
);
754 spin_lock_irqsave(&hwif
->lock
, flags
);
756 finish_wait(&ide_park_wq
, &wait
);
759 * First, reset any device state data we were maintaining
760 * for any of the drives on this interface.
762 ide_port_for_each_dev(i
, tdrive
, hwif
)
765 if (io_ports
->ctl_addr
== 0) {
766 spin_unlock_irqrestore(&hwif
->lock
, flags
);
767 ide_complete_drive_reset(drive
, -ENXIO
);
772 * Note that we also set nIEN while resetting the device,
773 * to mask unwanted interrupts from the interface during the reset.
774 * However, due to the design of PC hardware, this will cause an
775 * immediate interrupt due to the edge transition it produces.
776 * This single interrupt gives us a "fast poll" for drives that
777 * recover from reset very quickly, saving us the first 50ms wait time.
779 * TODO: add ->softreset method and stop abusing ->set_irq
781 /* set SRST and nIEN */
782 tp_ops
->set_irq(hwif
, 4);
783 /* more than enough time */
785 /* clear SRST, leave nIEN (unless device is on the quirk list) */
786 tp_ops
->set_irq(hwif
, drive
->quirk_list
== 2);
787 /* more than enough time */
789 hwif
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
791 __ide_set_handler(drive
, &reset_pollfunc
, HZ
/20, NULL
);
794 * Some weird controller like resetting themselves to a strange
795 * state when the disks are reset this way. At least, the Winbond
796 * 553 documentation says that
798 port_ops
= hwif
->port_ops
;
799 if (port_ops
&& port_ops
->resetproc
)
800 port_ops
->resetproc(drive
);
802 spin_unlock_irqrestore(&hwif
->lock
, flags
);
807 * ide_do_reset() is the entry point to the drive/interface reset code.
810 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
812 return do_reset1(drive
, 0);
815 EXPORT_SYMBOL(ide_do_reset
);
818 * ide_wait_not_busy() waits for the currently selected device on the hwif
819 * to report a non-busy status, see comments in ide_probe_port().
821 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
827 * Turn this into a schedule() sleep once I'm sure
828 * about locking issues (2.5 work ?).
831 stat
= hwif
->tp_ops
->read_status(hwif
);
832 if ((stat
& ATA_BUSY
) == 0)
835 * Assume a value of 0xff means nothing is connected to
836 * the interface and it doesn't implement the pull-down
841 touch_softlockup_watchdog();
842 touch_nmi_watchdog();