Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | /* |
1da177e4 | 3 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
ccd32e22 | 4 | * Copyright (C) 2003 Red Hat |
1da177e4 LT |
5 | * |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/module.h> |
9 | #include <linux/types.h> | |
10 | #include <linux/string.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/timer.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/major.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/genhd.h> | |
18 | #include <linux/blkpg.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/delay.h> | |
1da177e4 LT |
22 | #include <linux/ide.h> |
23 | #include <linux/bitops.h> | |
1e86240f | 24 | #include <linux/nmi.h> |
1da177e4 LT |
25 | |
26 | #include <asm/byteorder.h> | |
27 | #include <asm/irq.h> | |
7c0f6ba6 | 28 | #include <linux/uaccess.h> |
1da177e4 LT |
29 | #include <asm/io.h> |
30 | ||
ed4af48f | 31 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 32 | { |
ac95beed BZ |
33 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
34 | ||
35 | if (port_ops && port_ops->maskproc) | |
36 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
37 | } |
38 | ||
92eb4380 BZ |
39 | u8 ide_read_error(ide_drive_t *drive) |
40 | { | |
3153c26b | 41 | struct ide_taskfile tf; |
92eb4380 | 42 | |
3153c26b | 43 | drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR); |
92eb4380 | 44 | |
3153c26b | 45 | return tf.error; |
92eb4380 BZ |
46 | } |
47 | EXPORT_SYMBOL_GPL(ide_read_error); | |
48 | ||
4dde4492 | 49 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
50 | { |
51 | #ifndef __LITTLE_ENDIAN | |
52 | # ifdef __BIG_ENDIAN | |
53 | int i; | |
5b90e990 | 54 | |
48fb2688 | 55 | for (i = 0; i < 256; i++) |
5b90e990 | 56 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
57 | # else |
58 | # error "Please fix <asm/byteorder.h>" | |
59 | # endif | |
60 | #endif | |
61 | } | |
62 | ||
01745112 BZ |
63 | /* |
64 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
65 | * removing leading/trailing blanks and compressing internal blanks. | |
66 | * It is primarily used to tidy up the model name/number fields as | |
aaaade3f | 67 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
68 | */ |
69 | ||
122f06f8 | 70 | void ide_fixstring(u8 *s, const int bytecount, const int byteswap) |
1da177e4 | 71 | { |
1a7809e3 | 72 | u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
1da177e4 LT |
73 | |
74 | if (byteswap) { | |
75 | /* convert from big-endian to host byte order */ | |
1a7809e3 LT |
76 | for (p = s ; p != end ; p += 2) |
77 | be16_to_cpus((u16 *) p); | |
1da177e4 | 78 | } |
1a7809e3 | 79 | |
1da177e4 | 80 | /* strip leading blanks */ |
1a7809e3 | 81 | p = s; |
1da177e4 LT |
82 | while (s != end && *s == ' ') |
83 | ++s; | |
84 | /* compress internal blanks and strip trailing blanks */ | |
85 | while (s != end && *s) { | |
86 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
87 | *p++ = *(s-1); | |
88 | } | |
89 | /* wipe out trailing garbage */ | |
90 | while (p != end) | |
91 | *p++ = '\0'; | |
92 | } | |
1da177e4 LT |
93 | EXPORT_SYMBOL(ide_fixstring); |
94 | ||
1da177e4 LT |
95 | /* |
96 | * This routine busy-waits for the drive status to be not "busy". | |
97 | * It then checks the status for all of the "good" bits and none | |
98 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 99 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
100 | * |
101 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
102 | * That could be done by busy-waiting for the first jiffy or two, and then | |
103 | * setting a timer to wake up at half second intervals thereafter, | |
104 | * until timeout is achieved, before timing out. | |
105 | */ | |
fa56d4cb BZ |
106 | int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, |
107 | unsigned long timeout, u8 *rstat) | |
1da177e4 | 108 | { |
b73c7ee2 | 109 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 110 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 111 | unsigned long flags; |
47b82e88 | 112 | bool irqs_threaded = force_irqthreads; |
74af21cf BZ |
113 | int i; |
114 | u8 stat; | |
1da177e4 LT |
115 | |
116 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 117 | stat = tp_ops->read_status(hwif); |
c47137a9 | 118 | |
3a7d2484 | 119 | if (stat & ATA_BUSY) { |
47b82e88 SAS |
120 | if (!irqs_threaded) { |
121 | local_save_flags(flags); | |
122 | local_irq_enable_in_hardirq(); | |
123 | } | |
1da177e4 | 124 | timeout += jiffies; |
3a7d2484 | 125 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
126 | if (time_after(jiffies, timeout)) { |
127 | /* | |
128 | * One last read after the timeout in case | |
129 | * heavy interrupt load made us not make any | |
130 | * progress during the timeout.. | |
131 | */ | |
374e042c | 132 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 133 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
134 | break; |
135 | ||
47b82e88 SAS |
136 | if (!irqs_threaded) |
137 | local_irq_restore(flags); | |
74af21cf BZ |
138 | *rstat = stat; |
139 | return -EBUSY; | |
1da177e4 LT |
140 | } |
141 | } | |
47b82e88 SAS |
142 | if (!irqs_threaded) |
143 | local_irq_restore(flags); | |
1da177e4 LT |
144 | } |
145 | /* | |
146 | * Allow status to settle, then read it again. | |
147 | * A few rare drives vastly violate the 400ns spec here, | |
148 | * so we'll wait up to 10usec for a "good" status | |
149 | * rather than expensively fail things immediately. | |
150 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
151 | */ | |
152 | for (i = 0; i < 10; i++) { | |
153 | udelay(1); | |
374e042c | 154 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
155 | |
156 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 157 | *rstat = stat; |
1da177e4 | 158 | return 0; |
74af21cf | 159 | } |
1da177e4 | 160 | } |
74af21cf BZ |
161 | *rstat = stat; |
162 | return -EFAULT; | |
163 | } | |
164 | ||
165 | /* | |
166 | * In case of error returns error value after doing "*startstop = ide_error()". | |
167 | * The caller should return the updated value of "startstop" in this case, | |
168 | * "startstop" is unchanged when the function returns 0. | |
169 | */ | |
122f06f8 BZ |
170 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, |
171 | u8 bad, unsigned long timeout) | |
74af21cf BZ |
172 | { |
173 | int err; | |
174 | u8 stat; | |
175 | ||
176 | /* bail early if we've exceeded max_failures */ | |
177 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
178 | *startstop = ide_stopped; | |
179 | return 1; | |
180 | } | |
181 | ||
182 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
183 | ||
184 | if (err) { | |
185 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
186 | *startstop = ide_error(drive, s, stat); | |
187 | } | |
188 | ||
189 | return err; | |
1da177e4 | 190 | } |
1da177e4 LT |
191 | EXPORT_SYMBOL(ide_wait_stat); |
192 | ||
a5b7e70d BZ |
193 | /** |
194 | * ide_in_drive_list - look for drive in black/white list | |
195 | * @id: drive identifier | |
4dde4492 | 196 | * @table: list to inspect |
a5b7e70d BZ |
197 | * |
198 | * Look for a drive in the blacklist and the whitelist tables | |
199 | * Returns 1 if the drive is found in the table. | |
200 | */ | |
201 | ||
4dde4492 | 202 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 203 | { |
4dde4492 BZ |
204 | for ( ; table->id_model; table++) |
205 | if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && | |
206 | (!table->id_firmware || | |
207 | strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) | |
a5b7e70d BZ |
208 | return 1; |
209 | return 0; | |
210 | } | |
b0244a00 BZ |
211 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
212 | ||
a5b7e70d BZ |
213 | /* |
214 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
8588a2b7 | 215 | * Some optical devices with the buggy firmwares have the same problem. |
a5b7e70d BZ |
216 | */ |
217 | static const struct drive_list_entry ivb_list[] = { | |
218 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
ba9413bd | 219 | { "QUANTUM FIREBALLlct20 30" , "APL.0900" }, |
8588a2b7 | 220 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
221 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
222 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
223 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
224 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
225 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 226 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
227 | { NULL , NULL } |
228 | }; | |
229 | ||
1da177e4 LT |
230 | /* |
231 | * All hosts that use the 80c ribbon must use! | |
232 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
233 | */ | |
122f06f8 | 234 | u8 eighty_ninty_three(ide_drive_t *drive) |
1da177e4 | 235 | { |
7f8f48af | 236 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 237 | u16 *id = drive->id; |
a5b7e70d | 238 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 239 | |
76937fa7 | 240 | if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT) |
49521f97 BZ |
241 | return 1; |
242 | ||
a5b7e70d BZ |
243 | if (ivb) |
244 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
245 | drive->name); | |
246 | ||
367d7e78 | 247 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
248 | return 1; |
249 | ||
a5b7e70d | 250 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 251 | goto no_80w; |
1a1276e7 | 252 | |
f68d9320 BZ |
253 | /* |
254 | * FIXME: | |
f367bed0 | 255 | * - change master/slave IDENTIFY order |
a5b7e70d | 256 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
257 | * (unless the slave device is pre-ATA3) |
258 | */ | |
8369d5fa | 259 | if (id[ATA_ID_HW_CONFIG] & 0x4000) |
7f8f48af BZ |
260 | return 1; |
261 | ||
8369d5fa BZ |
262 | if (ivb) { |
263 | const char *model = (char *)&id[ATA_ID_PROD]; | |
264 | ||
265 | if (strstr(model, "TSSTcorp CDDVDW SH-S202")) { | |
266 | /* | |
267 | * These ATAPI devices always report 80c cable | |
268 | * so we have to depend on the host in this case. | |
269 | */ | |
270 | if (hwif->cbl == ATA_CBL_PATA80) | |
271 | return 1; | |
272 | } else { | |
273 | /* Depend on the device side cable detection. */ | |
274 | if (id[ATA_ID_HW_CONFIG] & 0x2000) | |
275 | return 1; | |
276 | } | |
277 | } | |
7f8f48af | 278 | no_80w: |
97100fc8 | 279 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
280 | return 0; |
281 | ||
282 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
283 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
284 | drive->name, |
285 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 286 | |
97100fc8 | 287 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
288 | |
289 | return 0; | |
1da177e4 LT |
290 | } |
291 | ||
8bc1e5aa BZ |
292 | static const char *nien_quirk_list[] = { |
293 | "QUANTUM FIREBALLlct08 08", | |
294 | "QUANTUM FIREBALLP KA6.4", | |
295 | "QUANTUM FIREBALLP KA9.1", | |
296 | "QUANTUM FIREBALLP KX13.6", | |
297 | "QUANTUM FIREBALLP KX20.5", | |
298 | "QUANTUM FIREBALLP KX27.3", | |
299 | "QUANTUM FIREBALLP LM20.4", | |
300 | "QUANTUM FIREBALLP LM20.5", | |
a2d10568 | 301 | "FUJITSU MHZ2160BH G2", |
8bc1e5aa BZ |
302 | NULL |
303 | }; | |
304 | ||
305 | void ide_check_nien_quirk_list(ide_drive_t *drive) | |
306 | { | |
307 | const char **list, *m = (char *)&drive->id[ATA_ID_PROD]; | |
308 | ||
309 | for (list = nien_quirk_list; *list != NULL; list++) | |
310 | if (strstr(m, *list) != NULL) { | |
734affdc | 311 | drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK; |
8bc1e5aa BZ |
312 | return; |
313 | } | |
8bc1e5aa BZ |
314 | } |
315 | ||
8a455134 | 316 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 317 | { |
4dde4492 | 318 | u16 *id; |
2ebe1d9e | 319 | int rc; |
2f40c9b0 BZ |
320 | |
321 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); | |
322 | if (id == NULL) | |
323 | return 0; | |
1da177e4 | 324 | |
1da177e4 | 325 | SELECT_MASK(drive, 1); |
fa56d4cb | 326 | rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1); |
2ebe1d9e | 327 | SELECT_MASK(drive, 0); |
2f40c9b0 | 328 | |
2ebe1d9e | 329 | if (rc) |
2f40c9b0 | 330 | goto out_err; |
f323b80d | 331 | |
4dde4492 BZ |
332 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; |
333 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
334 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
74638c84 | 335 | drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES]; |
4dde4492 BZ |
336 | /* anything more ? */ |
337 | ||
338 | kfree(id); | |
339 | ||
1da177e4 | 340 | return 1; |
2f40c9b0 | 341 | out_err: |
2f40c9b0 BZ |
342 | if (rc == 2) |
343 | printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); | |
344 | kfree(id); | |
345 | return 0; | |
1da177e4 LT |
346 | } |
347 | ||
74af21cf | 348 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 349 | { |
74af21cf | 350 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 351 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c9ff9e7b | 352 | struct ide_taskfile tf; |
4dde4492 | 353 | u16 *id = drive->id, i; |
89613e66 | 354 | int error = 0; |
1da177e4 LT |
355 | u8 stat; |
356 | ||
1da177e4 | 357 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
358 | if (hwif->dma_ops) /* check if host supports DMA */ |
359 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
360 | #endif |
361 | ||
89613e66 | 362 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 363 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
364 | goto skip; |
365 | ||
1da177e4 LT |
366 | /* |
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). | |
371 | */ | |
ee1b1cc9 | 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 | ||
1da177e4 LT |
396 | if (error) { |
397 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
398 | return error; | |
399 | } | |
400 | ||
c4199930 SS |
401 | if (speed >= XFER_SW_DMA_0) { |
402 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; | |
403 | id[ATA_ID_MWDMA_MODES] &= ~0x0700; | |
404 | id[ATA_ID_SWDMA_MODES] &= ~0x0700; | |
74638c84 SS |
405 | if (ata_id_is_cfa(id)) |
406 | id[ATA_ID_CFA_MODES] &= ~0x0E00; | |
407 | } else if (ata_id_is_cfa(id)) | |
408 | id[ATA_ID_CFA_MODES] &= ~0x01C0; | |
1da177e4 | 409 | |
89613e66 | 410 | skip: |
1da177e4 | 411 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 412 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
413 | hwif->dma_ops->dma_host_set(drive, 1); |
414 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 415 | ide_dma_off_quietly(drive); |
1da177e4 LT |
416 | #endif |
417 | ||
4dde4492 BZ |
418 | if (speed >= XFER_UDMA_0) { |
419 | i = 1 << (speed - XFER_UDMA_0); | |
420 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
74638c84 SS |
421 | } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) { |
422 | i = speed - XFER_MW_DMA_2; | |
423 | id[ATA_ID_CFA_MODES] |= i << 9; | |
4dde4492 BZ |
424 | } else if (speed >= XFER_MW_DMA_0) { |
425 | i = 1 << (speed - XFER_MW_DMA_0); | |
426 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
427 | } else if (speed >= XFER_SW_DMA_0) { | |
428 | i = 1 << (speed - XFER_SW_DMA_0); | |
429 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
74638c84 SS |
430 | } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) { |
431 | i = speed - XFER_PIO_4; | |
432 | id[ATA_ID_CFA_MODES] |= i << 6; | |
1da177e4 | 433 | } |
4dde4492 | 434 | |
1da177e4 LT |
435 | if (!drive->init_speed) |
436 | drive->init_speed = speed; | |
437 | drive->current_speed = speed; | |
438 | return error; | |
439 | } | |
440 | ||
1da177e4 LT |
441 | /* |
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). | |
447 | * | |
448 | * See also ide_execute_command | |
449 | */ | |
327fa1c2 | 450 | void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
60c0cd02 | 451 | unsigned int timeout) |
1da177e4 | 452 | { |
b65fac32 BZ |
453 | ide_hwif_t *hwif = drive->hwif; |
454 | ||
455 | BUG_ON(hwif->handler); | |
456 | hwif->handler = handler; | |
b65fac32 BZ |
457 | hwif->timer.expires = jiffies + timeout; |
458 | hwif->req_gen_timer = hwif->req_gen; | |
459 | add_timer(&hwif->timer); | |
1da177e4 LT |
460 | } |
461 | ||
60c0cd02 BZ |
462 | void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
463 | unsigned int timeout) | |
1da177e4 | 464 | { |
b65fac32 | 465 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 466 | unsigned long flags; |
2a2ca6a9 | 467 | |
b65fac32 | 468 | spin_lock_irqsave(&hwif->lock, flags); |
60c0cd02 | 469 | __ide_set_handler(drive, handler, timeout); |
b65fac32 | 470 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 471 | } |
1da177e4 | 472 | EXPORT_SYMBOL(ide_set_handler); |
122f06f8 | 473 | |
1da177e4 LT |
474 | /** |
475 | * ide_execute_command - execute an IDE command | |
476 | * @drive: IDE drive to issue the command against | |
35b5d0be | 477 | * @cmd: command |
1da177e4 LT |
478 | * @handler: handler for next phase |
479 | * @timeout: timeout for command | |
1da177e4 LT |
480 | * |
481 | * Helper function to issue an IDE command. This handles the | |
122f06f8 | 482 | * atomicity requirements, command timing and ensures that the |
1da177e4 LT |
483 | * handler and IRQ setup do not race. All IDE command kick off |
484 | * should go via this function or do equivalent locking. | |
485 | */ | |
cd2a2d96 | 486 | |
35b5d0be BZ |
487 | void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd, |
488 | ide_handler_t *handler, unsigned timeout) | |
1da177e4 | 489 | { |
2a2ca6a9 | 490 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 491 | unsigned long flags; |
629f944b | 492 | |
b65fac32 | 493 | spin_lock_irqsave(&hwif->lock, flags); |
35b5d0be BZ |
494 | if ((cmd->protocol != ATAPI_PROT_DMA && |
495 | cmd->protocol != ATAPI_PROT_PIO) || | |
496 | (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT)) | |
497 | __ide_set_handler(drive, handler, timeout); | |
498 | hwif->tp_ops->exec_command(hwif, cmd->tf.command); | |
629f944b BZ |
499 | /* |
500 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
501 | * serviced before that. | |
502 | * | |
503 | * FIXME: we could skip this delay with care on non shared devices | |
504 | */ | |
1da177e4 | 505 | ndelay(400); |
b65fac32 | 506 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 507 | } |
1da177e4 | 508 | |
1da177e4 LT |
509 | /* |
510 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 511 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
512 | */ |
513 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
514 | { | |
515 | u8 stat = 0; | |
516 | ||
122f06f8 | 517 | while (timeout--) { |
1da177e4 LT |
518 | /* |
519 | * Turn this into a schedule() sleep once I'm sure | |
520 | * about locking issues (2.5 work ?). | |
521 | */ | |
522 | mdelay(1); | |
374e042c | 523 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 524 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
525 | return 0; |
526 | /* | |
527 | * Assume a value of 0xff means nothing is connected to | |
528 | * the interface and it doesn't implement the pull-down | |
529 | * resistor on D7. | |
530 | */ | |
531 | if (stat == 0xff) | |
532 | return -ENODEV; | |
6842f8c8 | 533 | touch_softlockup_watchdog(); |
1e86240f | 534 | touch_nmi_watchdog(); |
1da177e4 LT |
535 | } |
536 | return -EBUSY; | |
537 | } |