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> | |
7c0f6ba6 | 27 | #include <linux/uaccess.h> |
1da177e4 LT |
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 | */ | |
fa56d4cb BZ |
105 | 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; |
47b82e88 | 111 | bool irqs_threaded = force_irqthreads; |
74af21cf BZ |
112 | int i; |
113 | u8 stat; | |
1da177e4 LT |
114 | |
115 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 116 | stat = tp_ops->read_status(hwif); |
c47137a9 | 117 | |
3a7d2484 | 118 | if (stat & ATA_BUSY) { |
47b82e88 SAS |
119 | if (!irqs_threaded) { |
120 | local_save_flags(flags); | |
121 | local_irq_enable_in_hardirq(); | |
122 | } | |
1da177e4 | 123 | timeout += jiffies; |
3a7d2484 | 124 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
125 | if (time_after(jiffies, timeout)) { |
126 | /* | |
127 | * One last read after the timeout in case | |
128 | * heavy interrupt load made us not make any | |
129 | * progress during the timeout.. | |
130 | */ | |
374e042c | 131 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 132 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
133 | break; |
134 | ||
47b82e88 SAS |
135 | if (!irqs_threaded) |
136 | local_irq_restore(flags); | |
74af21cf BZ |
137 | *rstat = stat; |
138 | return -EBUSY; | |
1da177e4 LT |
139 | } |
140 | } | |
47b82e88 SAS |
141 | if (!irqs_threaded) |
142 | local_irq_restore(flags); | |
1da177e4 LT |
143 | } |
144 | /* | |
145 | * Allow status to settle, then read it again. | |
146 | * A few rare drives vastly violate the 400ns spec here, | |
147 | * so we'll wait up to 10usec for a "good" status | |
148 | * rather than expensively fail things immediately. | |
149 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
150 | */ | |
151 | for (i = 0; i < 10; i++) { | |
152 | udelay(1); | |
374e042c | 153 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
154 | |
155 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 156 | *rstat = stat; |
1da177e4 | 157 | return 0; |
74af21cf | 158 | } |
1da177e4 | 159 | } |
74af21cf BZ |
160 | *rstat = stat; |
161 | return -EFAULT; | |
162 | } | |
163 | ||
164 | /* | |
165 | * In case of error returns error value after doing "*startstop = ide_error()". | |
166 | * The caller should return the updated value of "startstop" in this case, | |
167 | * "startstop" is unchanged when the function returns 0. | |
168 | */ | |
122f06f8 BZ |
169 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, |
170 | u8 bad, unsigned long timeout) | |
74af21cf BZ |
171 | { |
172 | int err; | |
173 | u8 stat; | |
174 | ||
175 | /* bail early if we've exceeded max_failures */ | |
176 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
177 | *startstop = ide_stopped; | |
178 | return 1; | |
179 | } | |
180 | ||
181 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
182 | ||
183 | if (err) { | |
184 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
185 | *startstop = ide_error(drive, s, stat); | |
186 | } | |
187 | ||
188 | return err; | |
1da177e4 | 189 | } |
1da177e4 LT |
190 | EXPORT_SYMBOL(ide_wait_stat); |
191 | ||
a5b7e70d BZ |
192 | /** |
193 | * ide_in_drive_list - look for drive in black/white list | |
194 | * @id: drive identifier | |
4dde4492 | 195 | * @table: list to inspect |
a5b7e70d BZ |
196 | * |
197 | * Look for a drive in the blacklist and the whitelist tables | |
198 | * Returns 1 if the drive is found in the table. | |
199 | */ | |
200 | ||
4dde4492 | 201 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 202 | { |
4dde4492 BZ |
203 | for ( ; table->id_model; table++) |
204 | if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && | |
205 | (!table->id_firmware || | |
206 | strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) | |
a5b7e70d BZ |
207 | return 1; |
208 | return 0; | |
209 | } | |
b0244a00 BZ |
210 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
211 | ||
a5b7e70d BZ |
212 | /* |
213 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
8588a2b7 | 214 | * Some optical devices with the buggy firmwares have the same problem. |
a5b7e70d BZ |
215 | */ |
216 | static const struct drive_list_entry ivb_list[] = { | |
217 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
ba9413bd | 218 | { "QUANTUM FIREBALLlct20 30" , "APL.0900" }, |
8588a2b7 | 219 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
220 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
221 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
222 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
223 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
224 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 225 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
226 | { NULL , NULL } |
227 | }; | |
228 | ||
1da177e4 LT |
229 | /* |
230 | * All hosts that use the 80c ribbon must use! | |
231 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
232 | */ | |
122f06f8 | 233 | u8 eighty_ninty_three(ide_drive_t *drive) |
1da177e4 | 234 | { |
7f8f48af | 235 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 236 | u16 *id = drive->id; |
a5b7e70d | 237 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 238 | |
76937fa7 | 239 | if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT) |
49521f97 BZ |
240 | return 1; |
241 | ||
a5b7e70d BZ |
242 | if (ivb) |
243 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
244 | drive->name); | |
245 | ||
367d7e78 | 246 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
247 | return 1; |
248 | ||
a5b7e70d | 249 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 250 | goto no_80w; |
1a1276e7 | 251 | |
f68d9320 BZ |
252 | /* |
253 | * FIXME: | |
f367bed0 | 254 | * - change master/slave IDENTIFY order |
a5b7e70d | 255 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
256 | * (unless the slave device is pre-ATA3) |
257 | */ | |
8369d5fa | 258 | if (id[ATA_ID_HW_CONFIG] & 0x4000) |
7f8f48af BZ |
259 | return 1; |
260 | ||
8369d5fa BZ |
261 | if (ivb) { |
262 | const char *model = (char *)&id[ATA_ID_PROD]; | |
263 | ||
264 | if (strstr(model, "TSSTcorp CDDVDW SH-S202")) { | |
265 | /* | |
266 | * These ATAPI devices always report 80c cable | |
267 | * so we have to depend on the host in this case. | |
268 | */ | |
269 | if (hwif->cbl == ATA_CBL_PATA80) | |
270 | return 1; | |
271 | } else { | |
272 | /* Depend on the device side cable detection. */ | |
273 | if (id[ATA_ID_HW_CONFIG] & 0x2000) | |
274 | return 1; | |
275 | } | |
276 | } | |
7f8f48af | 277 | no_80w: |
97100fc8 | 278 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
279 | return 0; |
280 | ||
281 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
282 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
283 | drive->name, |
284 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 285 | |
97100fc8 | 286 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
287 | |
288 | return 0; | |
1da177e4 LT |
289 | } |
290 | ||
8bc1e5aa BZ |
291 | static const char *nien_quirk_list[] = { |
292 | "QUANTUM FIREBALLlct08 08", | |
293 | "QUANTUM FIREBALLP KA6.4", | |
294 | "QUANTUM FIREBALLP KA9.1", | |
295 | "QUANTUM FIREBALLP KX13.6", | |
296 | "QUANTUM FIREBALLP KX20.5", | |
297 | "QUANTUM FIREBALLP KX27.3", | |
298 | "QUANTUM FIREBALLP LM20.4", | |
299 | "QUANTUM FIREBALLP LM20.5", | |
a2d10568 | 300 | "FUJITSU MHZ2160BH G2", |
8bc1e5aa BZ |
301 | NULL |
302 | }; | |
303 | ||
304 | void ide_check_nien_quirk_list(ide_drive_t *drive) | |
305 | { | |
306 | const char **list, *m = (char *)&drive->id[ATA_ID_PROD]; | |
307 | ||
308 | for (list = nien_quirk_list; *list != NULL; list++) | |
309 | if (strstr(m, *list) != NULL) { | |
734affdc | 310 | drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK; |
8bc1e5aa BZ |
311 | return; |
312 | } | |
8bc1e5aa BZ |
313 | } |
314 | ||
8a455134 | 315 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 316 | { |
4dde4492 | 317 | u16 *id; |
2ebe1d9e | 318 | int rc; |
2f40c9b0 BZ |
319 | |
320 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); | |
321 | if (id == NULL) | |
322 | return 0; | |
1da177e4 | 323 | |
1da177e4 | 324 | SELECT_MASK(drive, 1); |
fa56d4cb | 325 | rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1); |
2ebe1d9e | 326 | SELECT_MASK(drive, 0); |
2f40c9b0 | 327 | |
2ebe1d9e | 328 | if (rc) |
2f40c9b0 | 329 | goto out_err; |
f323b80d | 330 | |
4dde4492 BZ |
331 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; |
332 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
333 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
74638c84 | 334 | drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES]; |
4dde4492 BZ |
335 | /* anything more ? */ |
336 | ||
337 | kfree(id); | |
338 | ||
1da177e4 | 339 | return 1; |
2f40c9b0 | 340 | out_err: |
2f40c9b0 BZ |
341 | if (rc == 2) |
342 | printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); | |
343 | kfree(id); | |
344 | return 0; | |
1da177e4 LT |
345 | } |
346 | ||
74af21cf | 347 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 348 | { |
74af21cf | 349 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 350 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c9ff9e7b | 351 | struct ide_taskfile tf; |
4dde4492 | 352 | u16 *id = drive->id, i; |
89613e66 | 353 | int error = 0; |
1da177e4 LT |
354 | u8 stat; |
355 | ||
1da177e4 | 356 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
357 | if (hwif->dma_ops) /* check if host supports DMA */ |
358 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
359 | #endif |
360 | ||
89613e66 | 361 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 362 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
363 | goto skip; |
364 | ||
1da177e4 LT |
365 | /* |
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). | |
370 | */ | |
ee1b1cc9 | 371 | |
1da177e4 | 372 | udelay(1); |
fdd88f0a | 373 | tp_ops->dev_select(drive); |
e5403bff | 374 | SELECT_MASK(drive, 1); |
1da177e4 | 375 | udelay(1); |
ecf3a31d | 376 | tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
59be2c80 | 377 | |
c9ff9e7b SS |
378 | memset(&tf, 0, sizeof(tf)); |
379 | tf.feature = SETFEATURES_XFER; | |
380 | tf.nsect = speed; | |
59be2c80 | 381 | |
c9ff9e7b | 382 | tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT); |
59be2c80 | 383 | |
aaaade3f | 384 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 385 | |
734affdc | 386 | if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) |
ecf3a31d | 387 | tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
1da177e4 | 388 | |
74af21cf | 389 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 390 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 391 | WAIT_CMD, &stat); |
1da177e4 LT |
392 | |
393 | SELECT_MASK(drive, 0); | |
394 | ||
1da177e4 LT |
395 | if (error) { |
396 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
397 | return error; | |
398 | } | |
399 | ||
c4199930 SS |
400 | if (speed >= XFER_SW_DMA_0) { |
401 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; | |
402 | id[ATA_ID_MWDMA_MODES] &= ~0x0700; | |
403 | id[ATA_ID_SWDMA_MODES] &= ~0x0700; | |
74638c84 SS |
404 | if (ata_id_is_cfa(id)) |
405 | id[ATA_ID_CFA_MODES] &= ~0x0E00; | |
406 | } else if (ata_id_is_cfa(id)) | |
407 | id[ATA_ID_CFA_MODES] &= ~0x01C0; | |
1da177e4 | 408 | |
89613e66 | 409 | skip: |
1da177e4 | 410 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 411 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
412 | hwif->dma_ops->dma_host_set(drive, 1); |
413 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 414 | ide_dma_off_quietly(drive); |
1da177e4 LT |
415 | #endif |
416 | ||
4dde4492 BZ |
417 | if (speed >= XFER_UDMA_0) { |
418 | i = 1 << (speed - XFER_UDMA_0); | |
419 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
74638c84 SS |
420 | } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) { |
421 | i = speed - XFER_MW_DMA_2; | |
422 | id[ATA_ID_CFA_MODES] |= i << 9; | |
4dde4492 BZ |
423 | } else if (speed >= XFER_MW_DMA_0) { |
424 | i = 1 << (speed - XFER_MW_DMA_0); | |
425 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
426 | } else if (speed >= XFER_SW_DMA_0) { | |
427 | i = 1 << (speed - XFER_SW_DMA_0); | |
428 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
74638c84 SS |
429 | } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) { |
430 | i = speed - XFER_PIO_4; | |
431 | id[ATA_ID_CFA_MODES] |= i << 6; | |
1da177e4 | 432 | } |
4dde4492 | 433 | |
1da177e4 LT |
434 | if (!drive->init_speed) |
435 | drive->init_speed = speed; | |
436 | drive->current_speed = speed; | |
437 | return error; | |
438 | } | |
439 | ||
1da177e4 LT |
440 | /* |
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). | |
446 | * | |
447 | * See also ide_execute_command | |
448 | */ | |
327fa1c2 | 449 | void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
60c0cd02 | 450 | unsigned int timeout) |
1da177e4 | 451 | { |
b65fac32 BZ |
452 | ide_hwif_t *hwif = drive->hwif; |
453 | ||
454 | BUG_ON(hwif->handler); | |
455 | hwif->handler = handler; | |
b65fac32 BZ |
456 | hwif->timer.expires = jiffies + timeout; |
457 | hwif->req_gen_timer = hwif->req_gen; | |
458 | add_timer(&hwif->timer); | |
1da177e4 LT |
459 | } |
460 | ||
60c0cd02 BZ |
461 | void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
462 | unsigned int timeout) | |
1da177e4 | 463 | { |
b65fac32 | 464 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 465 | unsigned long flags; |
2a2ca6a9 | 466 | |
b65fac32 | 467 | spin_lock_irqsave(&hwif->lock, flags); |
60c0cd02 | 468 | __ide_set_handler(drive, handler, timeout); |
b65fac32 | 469 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 470 | } |
1da177e4 | 471 | EXPORT_SYMBOL(ide_set_handler); |
122f06f8 | 472 | |
1da177e4 LT |
473 | /** |
474 | * ide_execute_command - execute an IDE command | |
475 | * @drive: IDE drive to issue the command against | |
35b5d0be | 476 | * @cmd: command |
1da177e4 LT |
477 | * @handler: handler for next phase |
478 | * @timeout: timeout for command | |
1da177e4 LT |
479 | * |
480 | * Helper function to issue an IDE command. This handles the | |
122f06f8 | 481 | * atomicity requirements, command timing and ensures that the |
1da177e4 LT |
482 | * handler and IRQ setup do not race. All IDE command kick off |
483 | * should go via this function or do equivalent locking. | |
484 | */ | |
cd2a2d96 | 485 | |
35b5d0be BZ |
486 | void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd, |
487 | ide_handler_t *handler, unsigned timeout) | |
1da177e4 | 488 | { |
2a2ca6a9 | 489 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 490 | unsigned long flags; |
629f944b | 491 | |
b65fac32 | 492 | spin_lock_irqsave(&hwif->lock, flags); |
35b5d0be BZ |
493 | if ((cmd->protocol != ATAPI_PROT_DMA && |
494 | cmd->protocol != ATAPI_PROT_PIO) || | |
495 | (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT)) | |
496 | __ide_set_handler(drive, handler, timeout); | |
497 | hwif->tp_ops->exec_command(hwif, cmd->tf.command); | |
629f944b BZ |
498 | /* |
499 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
500 | * serviced before that. | |
501 | * | |
502 | * FIXME: we could skip this delay with care on non shared devices | |
503 | */ | |
1da177e4 | 504 | ndelay(400); |
b65fac32 | 505 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 506 | } |
1da177e4 | 507 | |
1da177e4 LT |
508 | /* |
509 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 510 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
511 | */ |
512 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
513 | { | |
514 | u8 stat = 0; | |
515 | ||
122f06f8 | 516 | while (timeout--) { |
1da177e4 LT |
517 | /* |
518 | * Turn this into a schedule() sleep once I'm sure | |
519 | * about locking issues (2.5 work ?). | |
520 | */ | |
521 | mdelay(1); | |
374e042c | 522 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 523 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
524 | return 0; |
525 | /* | |
526 | * Assume a value of 0xff means nothing is connected to | |
527 | * the interface and it doesn't implement the pull-down | |
528 | * resistor on D7. | |
529 | */ | |
530 | if (stat == 0xff) | |
531 | return -ENODEV; | |
6842f8c8 | 532 | touch_softlockup_watchdog(); |
1e86240f | 533 | touch_nmi_watchdog(); |
1da177e4 LT |
534 | } |
535 | return -EBUSY; | |
536 | } |