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_MASK(ide_drive_t
*drive
, int mask
)
32 const struct ide_port_ops
*port_ops
= drive
->hwif
->port_ops
;
34 if (port_ops
&& port_ops
->maskproc
)
35 port_ops
->maskproc(drive
, mask
);
38 u8
ide_read_error(ide_drive_t
*drive
)
40 struct ide_taskfile tf
;
42 drive
->hwif
->tp_ops
->tf_read(drive
, &tf
, IDE_VALID_ERROR
);
46 EXPORT_SYMBOL_GPL(ide_read_error
);
48 void ide_fix_driveid(u16
*id
)
50 #ifndef __LITTLE_ENDIAN
54 for (i
= 0; i
< 256; i
++)
55 id
[i
] = __le16_to_cpu(id
[i
]);
57 # error "Please fix <asm/byteorder.h>"
63 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
64 * removing leading/trailing blanks and compressing internal blanks.
65 * It is primarily used to tidy up the model name/number fields as
66 * returned by the ATA_CMD_ID_ATA[PI] commands.
69 void ide_fixstring(u8
*s
, const int bytecount
, const int byteswap
)
71 u8
*p
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
74 /* convert from big-endian to host byte order */
75 for (p
= s
; p
!= end
; p
+= 2)
76 be16_to_cpus((u16
*) p
);
79 /* strip leading blanks */
81 while (s
!= end
&& *s
== ' ')
83 /* compress internal blanks and strip trailing blanks */
84 while (s
!= end
&& *s
) {
85 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
88 /* wipe out trailing garbage */
92 EXPORT_SYMBOL(ide_fixstring
);
95 * This routine busy-waits for the drive status to be not "busy".
96 * It then checks the status for all of the "good" bits and none
97 * of the "bad" bits, and if all is okay it returns 0. All other
98 * cases return error -- caller may then invoke ide_error().
100 * This routine should get fixed to not hog the cpu during extra long waits..
101 * That could be done by busy-waiting for the first jiffy or two, and then
102 * setting a timer to wake up at half second intervals thereafter,
103 * until timeout is achieved, before timing out.
105 int __ide_wait_stat(ide_drive_t
*drive
, u8 good
, u8 bad
,
106 unsigned long timeout
, u8
*rstat
)
108 ide_hwif_t
*hwif
= drive
->hwif
;
109 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
114 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
115 stat
= tp_ops
->read_status(hwif
);
117 if (stat
& ATA_BUSY
) {
118 local_save_flags(flags
);
119 local_irq_enable_in_hardirq();
121 while ((stat
= tp_ops
->read_status(hwif
)) & ATA_BUSY
) {
122 if (time_after(jiffies
, timeout
)) {
124 * One last read after the timeout in case
125 * heavy interrupt load made us not make any
126 * progress during the timeout..
128 stat
= tp_ops
->read_status(hwif
);
129 if ((stat
& ATA_BUSY
) == 0)
132 local_irq_restore(flags
);
137 local_irq_restore(flags
);
140 * Allow status to settle, then read it again.
141 * A few rare drives vastly violate the 400ns spec here,
142 * so we'll wait up to 10usec for a "good" status
143 * rather than expensively fail things immediately.
144 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
146 for (i
= 0; i
< 10; i
++) {
148 stat
= tp_ops
->read_status(hwif
);
150 if (OK_STAT(stat
, good
, bad
)) {
160 * In case of error returns error value after doing "*startstop = ide_error()".
161 * The caller should return the updated value of "startstop" in this case,
162 * "startstop" is unchanged when the function returns 0.
164 int ide_wait_stat(ide_startstop_t
*startstop
, ide_drive_t
*drive
, u8 good
,
165 u8 bad
, unsigned long timeout
)
170 /* bail early if we've exceeded max_failures */
171 if (drive
->max_failures
&& (drive
->failures
> drive
->max_failures
)) {
172 *startstop
= ide_stopped
;
176 err
= __ide_wait_stat(drive
, good
, bad
, timeout
, &stat
);
179 char *s
= (err
== -EBUSY
) ? "status timeout" : "status error";
180 *startstop
= ide_error(drive
, s
, stat
);
185 EXPORT_SYMBOL(ide_wait_stat
);
188 * ide_in_drive_list - look for drive in black/white list
189 * @id: drive identifier
190 * @table: list to inspect
192 * Look for a drive in the blacklist and the whitelist tables
193 * Returns 1 if the drive is found in the table.
196 int ide_in_drive_list(u16
*id
, const struct drive_list_entry
*table
)
198 for ( ; table
->id_model
; table
++)
199 if ((!strcmp(table
->id_model
, (char *)&id
[ATA_ID_PROD
])) &&
200 (!table
->id_firmware
||
201 strstr((char *)&id
[ATA_ID_FW_REV
], table
->id_firmware
)))
205 EXPORT_SYMBOL_GPL(ide_in_drive_list
);
208 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
209 * Some optical devices with the buggy firmwares have the same problem.
211 static const struct drive_list_entry ivb_list
[] = {
212 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
213 { "QUANTUM FIREBALLlct20 30" , "APL.0900" },
214 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
215 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
216 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
217 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
218 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
219 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
220 { "SAMSUNG SP0822N" , "WA100-10" },
225 * All hosts that use the 80c ribbon must use!
226 * The name is derived from upper byte of word 93 and the 80c ribbon.
228 u8
eighty_ninty_three(ide_drive_t
*drive
)
230 ide_hwif_t
*hwif
= drive
->hwif
;
232 int ivb
= ide_in_drive_list(id
, ivb_list
);
234 if (hwif
->cbl
== ATA_CBL_SATA
|| hwif
->cbl
== ATA_CBL_PATA40_SHORT
)
238 printk(KERN_DEBUG
"%s: skipping word 93 validity check\n",
241 if (ata_id_is_sata(id
) && !ivb
)
244 if (hwif
->cbl
!= ATA_CBL_PATA80
&& !ivb
)
247 if (id
[ATA_ID_HW_CONFIG
] & 0x4000)
251 const char *model
= (char *)&id
[ATA_ID_PROD
];
253 if (strstr(model
, "TSSTcorp CDDVDW SH-S202")) {
255 * These ATAPI devices always report 80c cable
256 * so we have to depend on the host in this case.
258 if (hwif
->cbl
== ATA_CBL_PATA80
)
261 /* Depend on the device side cable detection. */
262 if (id
[ATA_ID_HW_CONFIG
] & 0x2000)
267 if (drive
->dev_flags
& IDE_DFLAG_UDMA33_WARNED
)
270 printk(KERN_WARNING
"%s: %s side 80-wire cable detection failed, "
271 "limiting max speed to UDMA33\n",
273 hwif
->cbl
== ATA_CBL_PATA80
? "drive" : "host");
275 drive
->dev_flags
|= IDE_DFLAG_UDMA33_WARNED
;
280 static const char *nien_quirk_list
[] = {
281 "QUANTUM FIREBALLlct08 08",
282 "QUANTUM FIREBALLP KA6.4",
283 "QUANTUM FIREBALLP KA9.1",
284 "QUANTUM FIREBALLP KX13.6",
285 "QUANTUM FIREBALLP KX20.5",
286 "QUANTUM FIREBALLP KX27.3",
287 "QUANTUM FIREBALLP LM20.4",
288 "QUANTUM FIREBALLP LM20.5",
289 "FUJITSU MHZ2160BH G2",
293 void ide_check_nien_quirk_list(ide_drive_t
*drive
)
295 const char **list
, *m
= (char *)&drive
->id
[ATA_ID_PROD
];
297 for (list
= nien_quirk_list
; *list
!= NULL
; list
++)
298 if (strstr(m
, *list
) != NULL
) {
299 drive
->dev_flags
|= IDE_DFLAG_NIEN_QUIRK
;
304 int ide_driveid_update(ide_drive_t
*drive
)
309 id
= kmalloc(SECTOR_SIZE
, GFP_ATOMIC
);
313 SELECT_MASK(drive
, 1);
314 rc
= ide_dev_read_id(drive
, ATA_CMD_ID_ATA
, id
, 1);
315 SELECT_MASK(drive
, 0);
320 drive
->id
[ATA_ID_UDMA_MODES
] = id
[ATA_ID_UDMA_MODES
];
321 drive
->id
[ATA_ID_MWDMA_MODES
] = id
[ATA_ID_MWDMA_MODES
];
322 drive
->id
[ATA_ID_SWDMA_MODES
] = id
[ATA_ID_SWDMA_MODES
];
323 drive
->id
[ATA_ID_CFA_MODES
] = id
[ATA_ID_CFA_MODES
];
324 /* anything more ? */
331 printk(KERN_ERR
"%s: %s: bad status\n", drive
->name
, __func__
);
336 int ide_config_drive_speed(ide_drive_t
*drive
, u8 speed
)
338 ide_hwif_t
*hwif
= drive
->hwif
;
339 const struct ide_tp_ops
*tp_ops
= hwif
->tp_ops
;
340 struct ide_taskfile tf
;
341 u16
*id
= drive
->id
, i
;
345 #ifdef CONFIG_BLK_DEV_IDEDMA
346 if (hwif
->dma_ops
) /* check if host supports DMA */
347 hwif
->dma_ops
->dma_host_set(drive
, 0);
350 /* Skip setting PIO flow-control modes on pre-EIDE drives */
351 if ((speed
& 0xf8) == XFER_PIO_0
&& ata_id_has_iordy(drive
->id
) == 0)
355 * Don't use ide_wait_cmd here - it will
356 * attempt to set_geometry and recalibrate,
357 * but for some reason these don't work at
358 * this point (lost interrupt).
362 tp_ops
->dev_select(drive
);
363 SELECT_MASK(drive
, 1);
365 tp_ops
->write_devctl(hwif
, ATA_NIEN
| ATA_DEVCTL_OBS
);
367 memset(&tf
, 0, sizeof(tf
));
368 tf
.feature
= SETFEATURES_XFER
;
371 tp_ops
->tf_load(drive
, &tf
, IDE_VALID_FEATURE
| IDE_VALID_NSECT
);
373 tp_ops
->exec_command(hwif
, ATA_CMD_SET_FEATURES
);
375 if (drive
->dev_flags
& IDE_DFLAG_NIEN_QUIRK
)
376 tp_ops
->write_devctl(hwif
, ATA_DEVCTL_OBS
);
378 error
= __ide_wait_stat(drive
, drive
->ready_stat
,
379 ATA_BUSY
| ATA_DRQ
| ATA_ERR
,
382 SELECT_MASK(drive
, 0);
385 (void) ide_dump_status(drive
, "set_drive_speed_status", stat
);
389 if (speed
>= XFER_SW_DMA_0
) {
390 id
[ATA_ID_UDMA_MODES
] &= ~0xFF00;
391 id
[ATA_ID_MWDMA_MODES
] &= ~0x0700;
392 id
[ATA_ID_SWDMA_MODES
] &= ~0x0700;
393 if (ata_id_is_cfa(id
))
394 id
[ATA_ID_CFA_MODES
] &= ~0x0E00;
395 } else if (ata_id_is_cfa(id
))
396 id
[ATA_ID_CFA_MODES
] &= ~0x01C0;
399 #ifdef CONFIG_BLK_DEV_IDEDMA
400 if (speed
>= XFER_SW_DMA_0
&& (drive
->dev_flags
& IDE_DFLAG_USING_DMA
))
401 hwif
->dma_ops
->dma_host_set(drive
, 1);
402 else if (hwif
->dma_ops
) /* check if host supports DMA */
403 ide_dma_off_quietly(drive
);
406 if (speed
>= XFER_UDMA_0
) {
407 i
= 1 << (speed
- XFER_UDMA_0
);
408 id
[ATA_ID_UDMA_MODES
] |= (i
<< 8 | i
);
409 } else if (ata_id_is_cfa(id
) && speed
>= XFER_MW_DMA_3
) {
410 i
= speed
- XFER_MW_DMA_2
;
411 id
[ATA_ID_CFA_MODES
] |= i
<< 9;
412 } else if (speed
>= XFER_MW_DMA_0
) {
413 i
= 1 << (speed
- XFER_MW_DMA_0
);
414 id
[ATA_ID_MWDMA_MODES
] |= (i
<< 8 | i
);
415 } else if (speed
>= XFER_SW_DMA_0
) {
416 i
= 1 << (speed
- XFER_SW_DMA_0
);
417 id
[ATA_ID_SWDMA_MODES
] |= (i
<< 8 | i
);
418 } else if (ata_id_is_cfa(id
) && speed
>= XFER_PIO_5
) {
419 i
= speed
- XFER_PIO_4
;
420 id
[ATA_ID_CFA_MODES
] |= i
<< 6;
423 if (!drive
->init_speed
)
424 drive
->init_speed
= speed
;
425 drive
->current_speed
= speed
;
430 * This should get invoked any time we exit the driver to
431 * wait for an interrupt response from a drive. handler() points
432 * at the appropriate code to handle the next interrupt, and a
433 * timer is started to prevent us from waiting forever in case
434 * something goes wrong (see the ide_timer_expiry() handler later on).
436 * See also ide_execute_command
438 void __ide_set_handler(ide_drive_t
*drive
, ide_handler_t
*handler
,
439 unsigned int timeout
)
441 ide_hwif_t
*hwif
= drive
->hwif
;
443 BUG_ON(hwif
->handler
);
444 hwif
->handler
= handler
;
445 hwif
->timer
.expires
= jiffies
+ timeout
;
446 hwif
->req_gen_timer
= hwif
->req_gen
;
447 add_timer(&hwif
->timer
);
450 void ide_set_handler(ide_drive_t
*drive
, ide_handler_t
*handler
,
451 unsigned int timeout
)
453 ide_hwif_t
*hwif
= drive
->hwif
;
456 spin_lock_irqsave(&hwif
->lock
, flags
);
457 __ide_set_handler(drive
, handler
, timeout
);
458 spin_unlock_irqrestore(&hwif
->lock
, flags
);
460 EXPORT_SYMBOL(ide_set_handler
);
463 * ide_execute_command - execute an IDE command
464 * @drive: IDE drive to issue the command against
466 * @handler: handler for next phase
467 * @timeout: timeout for command
469 * Helper function to issue an IDE command. This handles the
470 * atomicity requirements, command timing and ensures that the
471 * handler and IRQ setup do not race. All IDE command kick off
472 * should go via this function or do equivalent locking.
475 void ide_execute_command(ide_drive_t
*drive
, struct ide_cmd
*cmd
,
476 ide_handler_t
*handler
, unsigned timeout
)
478 ide_hwif_t
*hwif
= drive
->hwif
;
481 spin_lock_irqsave(&hwif
->lock
, flags
);
482 if ((cmd
->protocol
!= ATAPI_PROT_DMA
&&
483 cmd
->protocol
!= ATAPI_PROT_PIO
) ||
484 (drive
->atapi_flags
& IDE_AFLAG_DRQ_INTERRUPT
))
485 __ide_set_handler(drive
, handler
, timeout
);
486 hwif
->tp_ops
->exec_command(hwif
, cmd
->tf
.command
);
488 spin_unlock_irqrestore(&hwif
->lock
, flags
);
492 * ide_wait_not_busy() waits for the currently selected device on the hwif
493 * to report a non-busy status, see comments in ide_probe_port().
495 int ide_wait_not_busy(ide_hwif_t
*hwif
, unsigned long timeout
)
501 * Turn this into a schedule() sleep once I'm sure
502 * about locking issues (2.5 work ?).
505 stat
= hwif
->tp_ops
->read_status(hwif
);
506 if ((stat
& ATA_BUSY
) == 0)
509 * Assume a value of 0xff means nothing is connected to
510 * the interface and it doesn't implement the pull-down
515 touch_softlockup_watchdog();
516 touch_nmi_watchdog();