Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
ccd32e22 | 3 | * Copyright (C) 2003 Red Hat |
1da177e4 LT |
4 | * |
5 | */ | |
6 | ||
1da177e4 LT |
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> | |
12 | #include <linux/mm.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> | |
1da177e4 LT |
21 | #include <linux/ide.h> |
22 | #include <linux/bitops.h> | |
1e86240f | 23 | #include <linux/nmi.h> |
1da177e4 LT |
24 | |
25 | #include <asm/byteorder.h> | |
26 | #include <asm/irq.h> | |
27 | #include <asm/uaccess.h> | |
28 | #include <asm/io.h> | |
29 | ||
ed4af48f | 30 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 31 | { |
ac95beed BZ |
32 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
33 | ||
34 | if (port_ops && port_ops->maskproc) | |
35 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
36 | } |
37 | ||
92eb4380 BZ |
38 | u8 ide_read_error(ide_drive_t *drive) |
39 | { | |
3153c26b | 40 | struct ide_taskfile tf; |
92eb4380 | 41 | |
3153c26b | 42 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR); |
92eb4380 | 43 | |
3153c26b | 44 | return tf.error; |
92eb4380 BZ |
45 | } |
46 | EXPORT_SYMBOL_GPL(ide_read_error); | |
47 | ||
4dde4492 | 48 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
49 | { |
50 | #ifndef __LITTLE_ENDIAN | |
51 | # ifdef __BIG_ENDIAN | |
52 | int i; | |
5b90e990 | 53 | |
48fb2688 | 54 | for (i = 0; i < 256; i++) |
5b90e990 | 55 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
56 | # else |
57 | # error "Please fix <asm/byteorder.h>" | |
58 | # endif | |
59 | #endif | |
60 | } | |
61 | ||
01745112 BZ |
62 | /* |
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 | |
aaaade3f | 66 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
67 | */ |
68 | ||
122f06f8 | 69 | void ide_fixstring(u8 *s, const int bytecount, const int byteswap) |
1da177e4 | 70 | { |
1a7809e3 | 71 | u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
1da177e4 LT |
72 | |
73 | if (byteswap) { | |
74 | /* convert from big-endian to host byte order */ | |
1a7809e3 LT |
75 | for (p = s ; p != end ; p += 2) |
76 | be16_to_cpus((u16 *) p); | |
1da177e4 | 77 | } |
1a7809e3 | 78 | |
1da177e4 | 79 | /* strip leading blanks */ |
1a7809e3 | 80 | p = s; |
1da177e4 LT |
81 | while (s != end && *s == ' ') |
82 | ++s; | |
83 | /* compress internal blanks and strip trailing blanks */ | |
84 | while (s != end && *s) { | |
85 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
86 | *p++ = *(s-1); | |
87 | } | |
88 | /* wipe out trailing garbage */ | |
89 | while (p != end) | |
90 | *p++ = '\0'; | |
91 | } | |
1da177e4 LT |
92 | EXPORT_SYMBOL(ide_fixstring); |
93 | ||
1da177e4 LT |
94 | /* |
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 | |
74af21cf | 98 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
99 | * |
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. | |
104 | */ | |
122f06f8 BZ |
105 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, |
106 | unsigned long timeout, u8 *rstat) | |
1da177e4 | 107 | { |
b73c7ee2 | 108 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 109 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 110 | unsigned long flags; |
74af21cf BZ |
111 | int i; |
112 | u8 stat; | |
1da177e4 LT |
113 | |
114 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 115 | stat = tp_ops->read_status(hwif); |
c47137a9 | 116 | |
3a7d2484 | 117 | if (stat & ATA_BUSY) { |
9b896033 | 118 | local_save_flags(flags); |
54cc1428 | 119 | local_irq_enable_in_hardirq(); |
1da177e4 | 120 | timeout += jiffies; |
3a7d2484 | 121 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
122 | if (time_after(jiffies, timeout)) { |
123 | /* | |
124 | * One last read after the timeout in case | |
125 | * heavy interrupt load made us not make any | |
126 | * progress during the timeout.. | |
127 | */ | |
374e042c | 128 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 129 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
130 | break; |
131 | ||
132 | local_irq_restore(flags); | |
74af21cf BZ |
133 | *rstat = stat; |
134 | return -EBUSY; | |
1da177e4 LT |
135 | } |
136 | } | |
137 | local_irq_restore(flags); | |
138 | } | |
139 | /* | |
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. | |
145 | */ | |
146 | for (i = 0; i < 10; i++) { | |
147 | udelay(1); | |
374e042c | 148 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
149 | |
150 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 151 | *rstat = stat; |
1da177e4 | 152 | return 0; |
74af21cf | 153 | } |
1da177e4 | 154 | } |
74af21cf BZ |
155 | *rstat = stat; |
156 | return -EFAULT; | |
157 | } | |
158 | ||
159 | /* | |
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. | |
163 | */ | |
122f06f8 BZ |
164 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, |
165 | u8 bad, unsigned long timeout) | |
74af21cf BZ |
166 | { |
167 | int err; | |
168 | u8 stat; | |
169 | ||
170 | /* bail early if we've exceeded max_failures */ | |
171 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
172 | *startstop = ide_stopped; | |
173 | return 1; | |
174 | } | |
175 | ||
176 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
177 | ||
178 | if (err) { | |
179 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
180 | *startstop = ide_error(drive, s, stat); | |
181 | } | |
182 | ||
183 | return err; | |
1da177e4 | 184 | } |
1da177e4 LT |
185 | EXPORT_SYMBOL(ide_wait_stat); |
186 | ||
a5b7e70d BZ |
187 | /** |
188 | * ide_in_drive_list - look for drive in black/white list | |
189 | * @id: drive identifier | |
4dde4492 | 190 | * @table: list to inspect |
a5b7e70d BZ |
191 | * |
192 | * Look for a drive in the blacklist and the whitelist tables | |
193 | * Returns 1 if the drive is found in the table. | |
194 | */ | |
195 | ||
4dde4492 | 196 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 197 | { |
4dde4492 BZ |
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))) | |
a5b7e70d BZ |
202 | return 1; |
203 | return 0; | |
204 | } | |
b0244a00 BZ |
205 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
206 | ||
a5b7e70d BZ |
207 | /* |
208 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
8588a2b7 | 209 | * Some optical devices with the buggy firmwares have the same problem. |
a5b7e70d BZ |
210 | */ |
211 | static const struct drive_list_entry ivb_list[] = { | |
212 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 213 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
214 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
215 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
216 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
217 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
218 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 219 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
220 | { NULL , NULL } |
221 | }; | |
222 | ||
1da177e4 LT |
223 | /* |
224 | * All hosts that use the 80c ribbon must use! | |
225 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
226 | */ | |
122f06f8 | 227 | u8 eighty_ninty_three(ide_drive_t *drive) |
1da177e4 | 228 | { |
7f8f48af | 229 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 230 | u16 *id = drive->id; |
a5b7e70d | 231 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 232 | |
49521f97 BZ |
233 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
234 | return 1; | |
235 | ||
a5b7e70d BZ |
236 | if (ivb) |
237 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
238 | drive->name); | |
239 | ||
367d7e78 | 240 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
241 | return 1; |
242 | ||
a5b7e70d | 243 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 244 | goto no_80w; |
1a1276e7 | 245 | |
f68d9320 BZ |
246 | /* |
247 | * FIXME: | |
f367bed0 | 248 | * - change master/slave IDENTIFY order |
a5b7e70d | 249 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
250 | * (unless the slave device is pre-ATA3) |
251 | */ | |
8369d5fa | 252 | if (id[ATA_ID_HW_CONFIG] & 0x4000) |
7f8f48af BZ |
253 | return 1; |
254 | ||
8369d5fa BZ |
255 | if (ivb) { |
256 | const char *model = (char *)&id[ATA_ID_PROD]; | |
257 | ||
258 | if (strstr(model, "TSSTcorp CDDVDW SH-S202")) { | |
259 | /* | |
260 | * These ATAPI devices always report 80c cable | |
261 | * so we have to depend on the host in this case. | |
262 | */ | |
263 | if (hwif->cbl == ATA_CBL_PATA80) | |
264 | return 1; | |
265 | } else { | |
266 | /* Depend on the device side cable detection. */ | |
267 | if (id[ATA_ID_HW_CONFIG] & 0x2000) | |
268 | return 1; | |
269 | } | |
270 | } | |
7f8f48af | 271 | no_80w: |
97100fc8 | 272 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
273 | return 0; |
274 | ||
275 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
276 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
277 | drive->name, |
278 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 279 | |
97100fc8 | 280 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
281 | |
282 | return 0; | |
1da177e4 LT |
283 | } |
284 | ||
8bc1e5aa BZ |
285 | static const char *nien_quirk_list[] = { |
286 | "QUANTUM FIREBALLlct08 08", | |
287 | "QUANTUM FIREBALLP KA6.4", | |
288 | "QUANTUM FIREBALLP KA9.1", | |
289 | "QUANTUM FIREBALLP KX13.6", | |
290 | "QUANTUM FIREBALLP KX20.5", | |
291 | "QUANTUM FIREBALLP KX27.3", | |
292 | "QUANTUM FIREBALLP LM20.4", | |
293 | "QUANTUM FIREBALLP LM20.5", | |
294 | NULL | |
295 | }; | |
296 | ||
297 | void ide_check_nien_quirk_list(ide_drive_t *drive) | |
298 | { | |
299 | const char **list, *m = (char *)&drive->id[ATA_ID_PROD]; | |
300 | ||
301 | for (list = nien_quirk_list; *list != NULL; list++) | |
302 | if (strstr(m, *list) != NULL) { | |
734affdc | 303 | drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK; |
8bc1e5aa BZ |
304 | return; |
305 | } | |
8bc1e5aa BZ |
306 | } |
307 | ||
8a455134 | 308 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 309 | { |
4dde4492 | 310 | u16 *id; |
2ebe1d9e | 311 | int rc; |
2f40c9b0 BZ |
312 | |
313 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); | |
314 | if (id == NULL) | |
315 | return 0; | |
1da177e4 | 316 | |
1da177e4 | 317 | SELECT_MASK(drive, 1); |
2ebe1d9e BZ |
318 | rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id); |
319 | SELECT_MASK(drive, 0); | |
2f40c9b0 | 320 | |
2ebe1d9e | 321 | if (rc) |
2f40c9b0 | 322 | goto out_err; |
f323b80d | 323 | |
4dde4492 BZ |
324 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; |
325 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
326 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
74638c84 | 327 | drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES]; |
4dde4492 BZ |
328 | /* anything more ? */ |
329 | ||
330 | kfree(id); | |
331 | ||
1da177e4 | 332 | return 1; |
2f40c9b0 | 333 | out_err: |
2f40c9b0 BZ |
334 | if (rc == 2) |
335 | printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); | |
336 | kfree(id); | |
337 | return 0; | |
1da177e4 LT |
338 | } |
339 | ||
74af21cf | 340 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 341 | { |
74af21cf | 342 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 343 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c9ff9e7b | 344 | struct ide_taskfile tf; |
4dde4492 | 345 | u16 *id = drive->id, i; |
89613e66 | 346 | int error = 0; |
1da177e4 LT |
347 | u8 stat; |
348 | ||
1da177e4 | 349 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
350 | if (hwif->dma_ops) /* check if host supports DMA */ |
351 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
352 | #endif |
353 | ||
89613e66 | 354 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 355 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
356 | goto skip; |
357 | ||
1da177e4 LT |
358 | /* |
359 | * Don't use ide_wait_cmd here - it will | |
360 | * attempt to set_geometry and recalibrate, | |
361 | * but for some reason these don't work at | |
362 | * this point (lost interrupt). | |
363 | */ | |
ee1b1cc9 | 364 | |
1da177e4 LT |
365 | /* |
366 | * FIXME: we race against the running IRQ here if | |
367 | * this is called from non IRQ context. If we use | |
368 | * disable_irq() we hang on the error path. Work | |
369 | * is needed. | |
370 | */ | |
ee1b1cc9 BZ |
371 | disable_irq_nosync(hwif->irq); |
372 | ||
1da177e4 | 373 | udelay(1); |
fdd88f0a | 374 | tp_ops->dev_select(drive); |
e5403bff | 375 | SELECT_MASK(drive, 1); |
1da177e4 | 376 | udelay(1); |
ecf3a31d | 377 | tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
59be2c80 | 378 | |
c9ff9e7b SS |
379 | memset(&tf, 0, sizeof(tf)); |
380 | tf.feature = SETFEATURES_XFER; | |
381 | tf.nsect = speed; | |
59be2c80 | 382 | |
c9ff9e7b | 383 | tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT); |
59be2c80 | 384 | |
aaaade3f | 385 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 386 | |
734affdc | 387 | if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) |
ecf3a31d | 388 | tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
1da177e4 | 389 | |
74af21cf | 390 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 391 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 392 | WAIT_CMD, &stat); |
1da177e4 LT |
393 | |
394 | SELECT_MASK(drive, 0); | |
395 | ||
396 | enable_irq(hwif->irq); | |
397 | ||
398 | if (error) { | |
399 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
400 | return error; | |
401 | } | |
402 | ||
c4199930 SS |
403 | if (speed >= XFER_SW_DMA_0) { |
404 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; | |
405 | id[ATA_ID_MWDMA_MODES] &= ~0x0700; | |
406 | id[ATA_ID_SWDMA_MODES] &= ~0x0700; | |
74638c84 SS |
407 | if (ata_id_is_cfa(id)) |
408 | id[ATA_ID_CFA_MODES] &= ~0x0E00; | |
409 | } else if (ata_id_is_cfa(id)) | |
410 | id[ATA_ID_CFA_MODES] &= ~0x01C0; | |
1da177e4 | 411 | |
89613e66 | 412 | skip: |
1da177e4 | 413 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 414 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
415 | hwif->dma_ops->dma_host_set(drive, 1); |
416 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 417 | ide_dma_off_quietly(drive); |
1da177e4 LT |
418 | #endif |
419 | ||
4dde4492 BZ |
420 | if (speed >= XFER_UDMA_0) { |
421 | i = 1 << (speed - XFER_UDMA_0); | |
422 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
74638c84 SS |
423 | } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) { |
424 | i = speed - XFER_MW_DMA_2; | |
425 | id[ATA_ID_CFA_MODES] |= i << 9; | |
4dde4492 BZ |
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); | |
74638c84 SS |
432 | } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) { |
433 | i = speed - XFER_PIO_4; | |
434 | id[ATA_ID_CFA_MODES] |= i << 6; | |
1da177e4 | 435 | } |
4dde4492 | 436 | |
1da177e4 LT |
437 | if (!drive->init_speed) |
438 | drive->init_speed = speed; | |
439 | drive->current_speed = speed; | |
440 | return error; | |
441 | } | |
442 | ||
1da177e4 LT |
443 | /* |
444 | * This should get invoked any time we exit the driver to | |
445 | * wait for an interrupt response from a drive. handler() points | |
446 | * at the appropriate code to handle the next interrupt, and a | |
447 | * timer is started to prevent us from waiting forever in case | |
448 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
449 | * | |
450 | * See also ide_execute_command | |
451 | */ | |
327fa1c2 | 452 | void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
60c0cd02 | 453 | unsigned int timeout) |
1da177e4 | 454 | { |
b65fac32 BZ |
455 | ide_hwif_t *hwif = drive->hwif; |
456 | ||
457 | BUG_ON(hwif->handler); | |
458 | hwif->handler = handler; | |
b65fac32 BZ |
459 | hwif->timer.expires = jiffies + timeout; |
460 | hwif->req_gen_timer = hwif->req_gen; | |
461 | add_timer(&hwif->timer); | |
1da177e4 LT |
462 | } |
463 | ||
60c0cd02 BZ |
464 | void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
465 | unsigned int timeout) | |
1da177e4 | 466 | { |
b65fac32 | 467 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 468 | unsigned long flags; |
2a2ca6a9 | 469 | |
b65fac32 | 470 | spin_lock_irqsave(&hwif->lock, flags); |
60c0cd02 | 471 | __ide_set_handler(drive, handler, timeout); |
b65fac32 | 472 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 473 | } |
1da177e4 | 474 | EXPORT_SYMBOL(ide_set_handler); |
122f06f8 | 475 | |
1da177e4 LT |
476 | /** |
477 | * ide_execute_command - execute an IDE command | |
478 | * @drive: IDE drive to issue the command against | |
35b5d0be | 479 | * @cmd: command |
1da177e4 LT |
480 | * @handler: handler for next phase |
481 | * @timeout: timeout for command | |
1da177e4 LT |
482 | * |
483 | * Helper function to issue an IDE command. This handles the | |
122f06f8 | 484 | * atomicity requirements, command timing and ensures that the |
1da177e4 LT |
485 | * handler and IRQ setup do not race. All IDE command kick off |
486 | * should go via this function or do equivalent locking. | |
487 | */ | |
cd2a2d96 | 488 | |
35b5d0be BZ |
489 | void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd, |
490 | ide_handler_t *handler, unsigned timeout) | |
1da177e4 | 491 | { |
2a2ca6a9 | 492 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 493 | unsigned long flags; |
629f944b | 494 | |
b65fac32 | 495 | spin_lock_irqsave(&hwif->lock, flags); |
35b5d0be BZ |
496 | if ((cmd->protocol != ATAPI_PROT_DMA && |
497 | cmd->protocol != ATAPI_PROT_PIO) || | |
498 | (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT)) | |
499 | __ide_set_handler(drive, handler, timeout); | |
500 | hwif->tp_ops->exec_command(hwif, cmd->tf.command); | |
629f944b BZ |
501 | /* |
502 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
503 | * serviced before that. | |
504 | * | |
505 | * FIXME: we could skip this delay with care on non shared devices | |
506 | */ | |
1da177e4 | 507 | ndelay(400); |
b65fac32 | 508 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 509 | } |
1da177e4 | 510 | |
1da177e4 LT |
511 | /* |
512 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 513 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
514 | */ |
515 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
516 | { | |
517 | u8 stat = 0; | |
518 | ||
122f06f8 | 519 | while (timeout--) { |
1da177e4 LT |
520 | /* |
521 | * Turn this into a schedule() sleep once I'm sure | |
522 | * about locking issues (2.5 work ?). | |
523 | */ | |
524 | mdelay(1); | |
374e042c | 525 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 526 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
527 | return 0; |
528 | /* | |
529 | * Assume a value of 0xff means nothing is connected to | |
530 | * the interface and it doesn't implement the pull-down | |
531 | * resistor on D7. | |
532 | */ | |
533 | if (stat == 0xff) | |
534 | return -ENODEV; | |
6842f8c8 | 535 | touch_softlockup_watchdog(); |
1e86240f | 536 | touch_nmi_watchdog(); |
1da177e4 LT |
537 | } |
538 | return -EBUSY; | |
539 | } |