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 | ||
122f06f8 | 30 | void SELECT_DRIVE(ide_drive_t *drive) |
1da177e4 | 31 | { |
23579a2a | 32 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 33 | const struct ide_port_ops *port_ops = hwif->port_ops; |
40f095f0 | 34 | ide_task_t task; |
23579a2a | 35 | |
ac95beed BZ |
36 | if (port_ops && port_ops->selectproc) |
37 | port_ops->selectproc(drive); | |
23579a2a | 38 | |
40f095f0 BZ |
39 | memset(&task, 0, sizeof(task)); |
40 | task.tf_flags = IDE_TFLAG_OUT_DEVICE; | |
41 | ||
374e042c | 42 | drive->hwif->tp_ops->tf_load(drive, &task); |
1da177e4 LT |
43 | } |
44 | ||
ed4af48f | 45 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 46 | { |
ac95beed BZ |
47 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
48 | ||
49 | if (port_ops && port_ops->maskproc) | |
50 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
51 | } |
52 | ||
92eb4380 BZ |
53 | u8 ide_read_error(ide_drive_t *drive) |
54 | { | |
55 | ide_task_t task; | |
56 | ||
57 | memset(&task, 0, sizeof(task)); | |
58 | task.tf_flags = IDE_TFLAG_IN_FEATURE; | |
59 | ||
374e042c | 60 | drive->hwif->tp_ops->tf_read(drive, &task); |
92eb4380 BZ |
61 | |
62 | return task.tf.error; | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(ide_read_error); | |
65 | ||
4dde4492 | 66 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
67 | { |
68 | #ifndef __LITTLE_ENDIAN | |
69 | # ifdef __BIG_ENDIAN | |
70 | int i; | |
5b90e990 | 71 | |
48fb2688 | 72 | for (i = 0; i < 256; i++) |
5b90e990 | 73 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
74 | # else |
75 | # error "Please fix <asm/byteorder.h>" | |
76 | # endif | |
77 | #endif | |
78 | } | |
79 | ||
01745112 BZ |
80 | /* |
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 | |
aaaade3f | 84 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
85 | */ |
86 | ||
122f06f8 | 87 | void ide_fixstring(u8 *s, const int bytecount, const int byteswap) |
1da177e4 | 88 | { |
1a7809e3 | 89 | u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
1da177e4 LT |
90 | |
91 | if (byteswap) { | |
92 | /* convert from big-endian to host byte order */ | |
1a7809e3 LT |
93 | for (p = s ; p != end ; p += 2) |
94 | be16_to_cpus((u16 *) p); | |
1da177e4 | 95 | } |
1a7809e3 | 96 | |
1da177e4 | 97 | /* strip leading blanks */ |
1a7809e3 | 98 | p = s; |
1da177e4 LT |
99 | while (s != end && *s == ' ') |
100 | ++s; | |
101 | /* compress internal blanks and strip trailing blanks */ | |
102 | while (s != end && *s) { | |
103 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
104 | *p++ = *(s-1); | |
105 | } | |
106 | /* wipe out trailing garbage */ | |
107 | while (p != end) | |
108 | *p++ = '\0'; | |
109 | } | |
1da177e4 LT |
110 | EXPORT_SYMBOL(ide_fixstring); |
111 | ||
1da177e4 LT |
112 | /* |
113 | * This routine busy-waits for the drive status to be not "busy". | |
114 | * It then checks the status for all of the "good" bits and none | |
115 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 116 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
117 | * |
118 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
119 | * That could be done by busy-waiting for the first jiffy or two, and then | |
120 | * setting a timer to wake up at half second intervals thereafter, | |
121 | * until timeout is achieved, before timing out. | |
122 | */ | |
122f06f8 BZ |
123 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, |
124 | unsigned long timeout, u8 *rstat) | |
1da177e4 | 125 | { |
b73c7ee2 | 126 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 127 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 128 | unsigned long flags; |
74af21cf BZ |
129 | int i; |
130 | u8 stat; | |
1da177e4 LT |
131 | |
132 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 133 | stat = tp_ops->read_status(hwif); |
c47137a9 | 134 | |
3a7d2484 | 135 | if (stat & ATA_BUSY) { |
9b896033 | 136 | local_save_flags(flags); |
54cc1428 | 137 | local_irq_enable_in_hardirq(); |
1da177e4 | 138 | timeout += jiffies; |
3a7d2484 | 139 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
140 | if (time_after(jiffies, timeout)) { |
141 | /* | |
142 | * One last read after the timeout in case | |
143 | * heavy interrupt load made us not make any | |
144 | * progress during the timeout.. | |
145 | */ | |
374e042c | 146 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 147 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
148 | break; |
149 | ||
150 | local_irq_restore(flags); | |
74af21cf BZ |
151 | *rstat = stat; |
152 | return -EBUSY; | |
1da177e4 LT |
153 | } |
154 | } | |
155 | local_irq_restore(flags); | |
156 | } | |
157 | /* | |
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. | |
163 | */ | |
164 | for (i = 0; i < 10; i++) { | |
165 | udelay(1); | |
374e042c | 166 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
167 | |
168 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 169 | *rstat = stat; |
1da177e4 | 170 | return 0; |
74af21cf | 171 | } |
1da177e4 | 172 | } |
74af21cf BZ |
173 | *rstat = stat; |
174 | return -EFAULT; | |
175 | } | |
176 | ||
177 | /* | |
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. | |
181 | */ | |
122f06f8 BZ |
182 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, |
183 | u8 bad, unsigned long timeout) | |
74af21cf BZ |
184 | { |
185 | int err; | |
186 | u8 stat; | |
187 | ||
188 | /* bail early if we've exceeded max_failures */ | |
189 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
190 | *startstop = ide_stopped; | |
191 | return 1; | |
192 | } | |
193 | ||
194 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
195 | ||
196 | if (err) { | |
197 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
198 | *startstop = ide_error(drive, s, stat); | |
199 | } | |
200 | ||
201 | return err; | |
1da177e4 | 202 | } |
1da177e4 LT |
203 | EXPORT_SYMBOL(ide_wait_stat); |
204 | ||
a5b7e70d BZ |
205 | /** |
206 | * ide_in_drive_list - look for drive in black/white list | |
207 | * @id: drive identifier | |
4dde4492 | 208 | * @table: list to inspect |
a5b7e70d BZ |
209 | * |
210 | * Look for a drive in the blacklist and the whitelist tables | |
211 | * Returns 1 if the drive is found in the table. | |
212 | */ | |
213 | ||
4dde4492 | 214 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 215 | { |
4dde4492 BZ |
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))) | |
a5b7e70d BZ |
220 | return 1; |
221 | return 0; | |
222 | } | |
b0244a00 BZ |
223 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
224 | ||
a5b7e70d BZ |
225 | /* |
226 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
227 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
228 | * |
229 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
230 | */ |
231 | static const struct drive_list_entry ivb_list[] = { | |
232 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 233 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
234 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
235 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
236 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
237 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
238 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 239 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
240 | { NULL , NULL } |
241 | }; | |
242 | ||
1da177e4 LT |
243 | /* |
244 | * All hosts that use the 80c ribbon must use! | |
245 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
246 | */ | |
122f06f8 | 247 | u8 eighty_ninty_three(ide_drive_t *drive) |
1da177e4 | 248 | { |
7f8f48af | 249 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 250 | u16 *id = drive->id; |
a5b7e70d | 251 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 252 | |
49521f97 BZ |
253 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
254 | return 1; | |
255 | ||
a5b7e70d BZ |
256 | if (ivb) |
257 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
258 | drive->name); | |
259 | ||
367d7e78 | 260 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
261 | return 1; |
262 | ||
a5b7e70d | 263 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 264 | goto no_80w; |
1a1276e7 | 265 | |
f68d9320 BZ |
266 | /* |
267 | * FIXME: | |
f367bed0 | 268 | * - change master/slave IDENTIFY order |
a5b7e70d | 269 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
270 | * (unless the slave device is pre-ATA3) |
271 | */ | |
4dde4492 BZ |
272 | if ((id[ATA_ID_HW_CONFIG] & 0x4000) || |
273 | (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) | |
7f8f48af BZ |
274 | return 1; |
275 | ||
276 | no_80w: | |
97100fc8 | 277 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
278 | return 0; |
279 | ||
280 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
281 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
282 | drive->name, |
283 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 284 | |
97100fc8 | 285 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
286 | |
287 | return 0; | |
1da177e4 LT |
288 | } |
289 | ||
8a455134 | 290 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 291 | { |
8a455134 | 292 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 293 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 294 | u16 *id; |
b163f46d | 295 | unsigned long flags; |
c47137a9 | 296 | u8 stat; |
1da177e4 | 297 | |
1da177e4 LT |
298 | /* |
299 | * Re-read drive->id for possible DMA mode | |
300 | * change (copied from ide-probe.c) | |
301 | */ | |
1da177e4 LT |
302 | |
303 | SELECT_MASK(drive, 1); | |
374e042c | 304 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 305 | msleep(50); |
aaaade3f | 306 | tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); |
c47137a9 | 307 | |
b163f46d BZ |
308 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { |
309 | SELECT_MASK(drive, 0); | |
310 | return 0; | |
311 | } | |
c47137a9 | 312 | |
3a7d2484 | 313 | msleep(50); /* wait for IRQ and ATA_DRQ */ |
374e042c | 314 | stat = tp_ops->read_status(hwif); |
c47137a9 | 315 | |
3a7d2484 | 316 | if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
317 | SELECT_MASK(drive, 0); |
318 | printk("%s: CHECK for good STATUS\n", drive->name); | |
319 | return 0; | |
320 | } | |
321 | local_irq_save(flags); | |
322 | SELECT_MASK(drive, 0); | |
151a6701 | 323 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); |
1da177e4 LT |
324 | if (!id) { |
325 | local_irq_restore(flags); | |
326 | return 0; | |
327 | } | |
374e042c BZ |
328 | tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
329 | (void)tp_ops->read_status(hwif); /* clear drive IRQ */ | |
1da177e4 LT |
330 | local_irq_enable(); |
331 | local_irq_restore(flags); | |
332 | ide_fix_driveid(id); | |
4dde4492 BZ |
333 | |
334 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; | |
335 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
336 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
337 | /* anything more ? */ | |
338 | ||
339 | kfree(id); | |
340 | ||
97100fc8 | 341 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive)) |
4dde4492 | 342 | ide_dma_off(drive); |
1da177e4 LT |
343 | |
344 | return 1; | |
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; |
4dde4492 | 351 | u16 *id = drive->id, i; |
89613e66 | 352 | int error = 0; |
1da177e4 | 353 | u8 stat; |
59be2c80 | 354 | ide_task_t task; |
1da177e4 | 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 LT |
372 | /* |
373 | * FIXME: we race against the running IRQ here if | |
374 | * this is called from non IRQ context. If we use | |
375 | * disable_irq() we hang on the error path. Work | |
376 | * is needed. | |
377 | */ | |
ee1b1cc9 BZ |
378 | disable_irq_nosync(hwif->irq); |
379 | ||
1da177e4 LT |
380 | udelay(1); |
381 | SELECT_DRIVE(drive); | |
e5403bff | 382 | SELECT_MASK(drive, 1); |
1da177e4 | 383 | udelay(1); |
374e042c | 384 | tp_ops->set_irq(hwif, 0); |
59be2c80 BZ |
385 | |
386 | memset(&task, 0, sizeof(task)); | |
387 | task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; | |
388 | task.tf.feature = SETFEATURES_XFER; | |
389 | task.tf.nsect = speed; | |
390 | ||
374e042c | 391 | tp_ops->tf_load(drive, &task); |
59be2c80 | 392 | |
aaaade3f | 393 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 394 | |
81ca6919 | 395 | if (drive->quirk_list == 2) |
374e042c | 396 | tp_ops->set_irq(hwif, 1); |
1da177e4 | 397 | |
74af21cf | 398 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 399 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 400 | WAIT_CMD, &stat); |
1da177e4 LT |
401 | |
402 | SELECT_MASK(drive, 0); | |
403 | ||
404 | enable_irq(hwif->irq); | |
405 | ||
406 | if (error) { | |
407 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
408 | return error; | |
409 | } | |
410 | ||
4dde4492 BZ |
411 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
412 | id[ATA_ID_MWDMA_MODES] &= ~0x0F00; | |
413 | id[ATA_ID_SWDMA_MODES] &= ~0x0F00; | |
1da177e4 | 414 | |
89613e66 | 415 | skip: |
1da177e4 | 416 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 417 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
418 | hwif->dma_ops->dma_host_set(drive, 1); |
419 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 420 | ide_dma_off_quietly(drive); |
1da177e4 LT |
421 | #endif |
422 | ||
4dde4492 BZ |
423 | if (speed >= XFER_UDMA_0) { |
424 | i = 1 << (speed - XFER_UDMA_0); | |
425 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
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); | |
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 BZ |
449 | void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
450 | unsigned int timeout, ide_expiry_t *expiry) | |
1da177e4 | 451 | { |
b65fac32 BZ |
452 | ide_hwif_t *hwif = drive->hwif; |
453 | ||
454 | BUG_ON(hwif->handler); | |
455 | hwif->handler = handler; | |
456 | hwif->expiry = expiry; | |
457 | hwif->timer.expires = jiffies + timeout; | |
458 | hwif->req_gen_timer = hwif->req_gen; | |
459 | add_timer(&hwif->timer); | |
1da177e4 LT |
460 | } |
461 | ||
462 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
463 | unsigned int timeout, ide_expiry_t *expiry) | |
464 | { | |
b65fac32 | 465 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 466 | unsigned long flags; |
2a2ca6a9 | 467 | |
b65fac32 | 468 | spin_lock_irqsave(&hwif->lock, flags); |
1da177e4 | 469 | __ide_set_handler(drive, handler, timeout, expiry); |
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 | |
477 | * @command: command byte to write | |
478 | * @handler: handler for next phase | |
479 | * @timeout: timeout for command | |
480 | * @expiry: handler to run on timeout | |
481 | * | |
482 | * Helper function to issue an IDE command. This handles the | |
122f06f8 | 483 | * atomicity requirements, command timing and ensures that the |
1da177e4 LT |
484 | * handler and IRQ setup do not race. All IDE command kick off |
485 | * should go via this function or do equivalent locking. | |
486 | */ | |
cd2a2d96 BZ |
487 | |
488 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
489 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 | 490 | { |
2a2ca6a9 | 491 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 492 | unsigned long flags; |
629f944b | 493 | |
b65fac32 | 494 | spin_lock_irqsave(&hwif->lock, flags); |
629f944b | 495 | __ide_set_handler(drive, handler, timeout, expiry); |
374e042c | 496 | hwif->tp_ops->exec_command(hwif, cmd); |
629f944b BZ |
497 | /* |
498 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
499 | * serviced before that. | |
500 | * | |
501 | * FIXME: we could skip this delay with care on non shared devices | |
502 | */ | |
1da177e4 | 503 | ndelay(400); |
b65fac32 | 504 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 505 | } |
1da177e4 LT |
506 | EXPORT_SYMBOL(ide_execute_command); |
507 | ||
1fc14258 BZ |
508 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
509 | { | |
510 | ide_hwif_t *hwif = drive->hwif; | |
511 | unsigned long flags; | |
512 | ||
b65fac32 | 513 | spin_lock_irqsave(&hwif->lock, flags); |
aaaade3f | 514 | hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); |
1fc14258 | 515 | ndelay(400); |
b65fac32 | 516 | spin_unlock_irqrestore(&hwif->lock, flags); |
1fc14258 BZ |
517 | } |
518 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 519 | |
1da177e4 LT |
520 | /* |
521 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 522 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
523 | */ |
524 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
525 | { | |
526 | u8 stat = 0; | |
527 | ||
122f06f8 | 528 | while (timeout--) { |
1da177e4 LT |
529 | /* |
530 | * Turn this into a schedule() sleep once I'm sure | |
531 | * about locking issues (2.5 work ?). | |
532 | */ | |
533 | mdelay(1); | |
374e042c | 534 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 535 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
536 | return 0; |
537 | /* | |
538 | * Assume a value of 0xff means nothing is connected to | |
539 | * the interface and it doesn't implement the pull-down | |
540 | * resistor on D7. | |
541 | */ | |
542 | if (stat == 0xff) | |
543 | return -ENODEV; | |
6842f8c8 | 544 | touch_softlockup_watchdog(); |
1e86240f | 545 | touch_nmi_watchdog(); |
1da177e4 LT |
546 | } |
547 | return -EBUSY; | |
548 | } |