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Commit | Line | Data |
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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 | ||
1da177e4 LT |
30 | void SELECT_DRIVE (ide_drive_t *drive) |
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 | ||
1da177e4 LT |
87 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
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 | } | |
110 | ||
111 | EXPORT_SYMBOL(ide_fixstring); | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * This routine busy-waits for the drive status to be not "busy". | |
115 | * It then checks the status for all of the "good" bits and none | |
116 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 117 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
118 | * |
119 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
120 | * That could be done by busy-waiting for the first jiffy or two, and then | |
121 | * setting a timer to wake up at half second intervals thereafter, | |
122 | * until timeout is achieved, before timing out. | |
123 | */ | |
aedea591 | 124 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, 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 | */ | |
182 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
183 | { | |
184 | int err; | |
185 | u8 stat; | |
186 | ||
187 | /* bail early if we've exceeded max_failures */ | |
188 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
189 | *startstop = ide_stopped; | |
190 | return 1; | |
191 | } | |
192 | ||
193 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
194 | ||
195 | if (err) { | |
196 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
197 | *startstop = ide_error(drive, s, stat); | |
198 | } | |
199 | ||
200 | return err; | |
1da177e4 LT |
201 | } |
202 | ||
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 | } | |
223 | ||
b0244a00 BZ |
224 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
225 | ||
a5b7e70d BZ |
226 | /* |
227 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
228 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
229 | * |
230 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
231 | */ |
232 | static const struct drive_list_entry ivb_list[] = { | |
233 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 234 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
235 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
236 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
237 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
238 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
239 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 240 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
241 | { NULL , NULL } |
242 | }; | |
243 | ||
1da177e4 LT |
244 | /* |
245 | * All hosts that use the 80c ribbon must use! | |
246 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
247 | */ | |
248 | u8 eighty_ninty_three (ide_drive_t *drive) | |
249 | { | |
7f8f48af | 250 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 251 | u16 *id = drive->id; |
a5b7e70d | 252 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 253 | |
49521f97 BZ |
254 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
255 | return 1; | |
256 | ||
a5b7e70d BZ |
257 | if (ivb) |
258 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
259 | drive->name); | |
260 | ||
367d7e78 | 261 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
262 | return 1; |
263 | ||
a5b7e70d | 264 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 265 | goto no_80w; |
1a1276e7 | 266 | |
f68d9320 BZ |
267 | /* |
268 | * FIXME: | |
f367bed0 | 269 | * - change master/slave IDENTIFY order |
a5b7e70d | 270 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
271 | * (unless the slave device is pre-ATA3) |
272 | */ | |
4dde4492 BZ |
273 | if ((id[ATA_ID_HW_CONFIG] & 0x4000) || |
274 | (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) | |
7f8f48af BZ |
275 | return 1; |
276 | ||
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 | ||
8a455134 | 291 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 292 | { |
8a455134 | 293 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 294 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 295 | u16 *id; |
b163f46d | 296 | unsigned long flags; |
c47137a9 | 297 | u8 stat; |
1da177e4 | 298 | |
1da177e4 LT |
299 | /* |
300 | * Re-read drive->id for possible DMA mode | |
301 | * change (copied from ide-probe.c) | |
302 | */ | |
1da177e4 LT |
303 | |
304 | SELECT_MASK(drive, 1); | |
374e042c | 305 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 306 | msleep(50); |
aaaade3f | 307 | tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); |
c47137a9 | 308 | |
b163f46d BZ |
309 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { |
310 | SELECT_MASK(drive, 0); | |
311 | return 0; | |
312 | } | |
c47137a9 | 313 | |
3a7d2484 | 314 | msleep(50); /* wait for IRQ and ATA_DRQ */ |
374e042c | 315 | stat = tp_ops->read_status(hwif); |
c47137a9 | 316 | |
3a7d2484 | 317 | if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
318 | SELECT_MASK(drive, 0); |
319 | printk("%s: CHECK for good STATUS\n", drive->name); | |
320 | return 0; | |
321 | } | |
322 | local_irq_save(flags); | |
323 | SELECT_MASK(drive, 0); | |
151a6701 | 324 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); |
1da177e4 LT |
325 | if (!id) { |
326 | local_irq_restore(flags); | |
327 | return 0; | |
328 | } | |
374e042c BZ |
329 | tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
330 | (void)tp_ops->read_status(hwif); /* clear drive IRQ */ | |
1da177e4 LT |
331 | local_irq_enable(); |
332 | local_irq_restore(flags); | |
333 | ide_fix_driveid(id); | |
4dde4492 BZ |
334 | |
335 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; | |
336 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
337 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
338 | /* anything more ? */ | |
339 | ||
340 | kfree(id); | |
341 | ||
97100fc8 | 342 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive)) |
4dde4492 | 343 | ide_dma_off(drive); |
1da177e4 LT |
344 | |
345 | return 1; | |
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; |
4dde4492 | 352 | u16 *id = drive->id, i; |
89613e66 | 353 | int error = 0; |
1da177e4 | 354 | u8 stat; |
59be2c80 | 355 | ide_task_t task; |
1da177e4 | 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 | */ | |
372 | /* | |
373 | * Select the drive, and issue the SETFEATURES command | |
374 | */ | |
375 | disable_irq_nosync(hwif->irq); | |
376 | ||
377 | /* | |
378 | * FIXME: we race against the running IRQ here if | |
379 | * this is called from non IRQ context. If we use | |
380 | * disable_irq() we hang on the error path. Work | |
381 | * is needed. | |
382 | */ | |
383 | ||
384 | udelay(1); | |
385 | SELECT_DRIVE(drive); | |
e5403bff | 386 | SELECT_MASK(drive, 1); |
1da177e4 | 387 | udelay(1); |
374e042c | 388 | tp_ops->set_irq(hwif, 0); |
59be2c80 BZ |
389 | |
390 | memset(&task, 0, sizeof(task)); | |
391 | task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; | |
392 | task.tf.feature = SETFEATURES_XFER; | |
393 | task.tf.nsect = speed; | |
394 | ||
374e042c | 395 | tp_ops->tf_load(drive, &task); |
59be2c80 | 396 | |
aaaade3f | 397 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 398 | |
81ca6919 | 399 | if (drive->quirk_list == 2) |
374e042c | 400 | tp_ops->set_irq(hwif, 1); |
1da177e4 | 401 | |
74af21cf | 402 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 403 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 404 | WAIT_CMD, &stat); |
1da177e4 LT |
405 | |
406 | SELECT_MASK(drive, 0); | |
407 | ||
408 | enable_irq(hwif->irq); | |
409 | ||
410 | if (error) { | |
411 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
412 | return error; | |
413 | } | |
414 | ||
4dde4492 BZ |
415 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
416 | id[ATA_ID_MWDMA_MODES] &= ~0x0F00; | |
417 | id[ATA_ID_SWDMA_MODES] &= ~0x0F00; | |
1da177e4 | 418 | |
89613e66 | 419 | skip: |
1da177e4 | 420 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 421 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
422 | hwif->dma_ops->dma_host_set(drive, 1); |
423 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 424 | ide_dma_off_quietly(drive); |
1da177e4 LT |
425 | #endif |
426 | ||
4dde4492 BZ |
427 | if (speed >= XFER_UDMA_0) { |
428 | i = 1 << (speed - XFER_UDMA_0); | |
429 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
430 | } else if (speed >= XFER_MW_DMA_0) { | |
431 | i = 1 << (speed - XFER_MW_DMA_0); | |
432 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
433 | } else if (speed >= XFER_SW_DMA_0) { | |
434 | i = 1 << (speed - XFER_SW_DMA_0); | |
435 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
1da177e4 | 436 | } |
4dde4492 | 437 | |
1da177e4 LT |
438 | if (!drive->init_speed) |
439 | drive->init_speed = speed; | |
440 | drive->current_speed = speed; | |
441 | return error; | |
442 | } | |
443 | ||
1da177e4 LT |
444 | /* |
445 | * This should get invoked any time we exit the driver to | |
446 | * wait for an interrupt response from a drive. handler() points | |
447 | * at the appropriate code to handle the next interrupt, and a | |
448 | * timer is started to prevent us from waiting forever in case | |
449 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
450 | * | |
451 | * See also ide_execute_command | |
452 | */ | |
453 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
454 | unsigned int timeout, ide_expiry_t *expiry) | |
455 | { | |
b65fac32 BZ |
456 | ide_hwif_t *hwif = drive->hwif; |
457 | ||
458 | BUG_ON(hwif->handler); | |
459 | hwif->handler = handler; | |
460 | hwif->expiry = expiry; | |
461 | hwif->timer.expires = jiffies + timeout; | |
462 | hwif->req_gen_timer = hwif->req_gen; | |
463 | add_timer(&hwif->timer); | |
1da177e4 LT |
464 | } |
465 | ||
466 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
467 | unsigned int timeout, ide_expiry_t *expiry) | |
468 | { | |
b65fac32 | 469 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 470 | unsigned long flags; |
2a2ca6a9 | 471 | |
b65fac32 | 472 | spin_lock_irqsave(&hwif->lock, flags); |
1da177e4 | 473 | __ide_set_handler(drive, handler, timeout, expiry); |
b65fac32 | 474 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
475 | } |
476 | ||
477 | EXPORT_SYMBOL(ide_set_handler); | |
478 | ||
479 | /** | |
480 | * ide_execute_command - execute an IDE command | |
481 | * @drive: IDE drive to issue the command against | |
482 | * @command: command byte to write | |
483 | * @handler: handler for next phase | |
484 | * @timeout: timeout for command | |
485 | * @expiry: handler to run on timeout | |
486 | * | |
487 | * Helper function to issue an IDE command. This handles the | |
488 | * atomicity requirements, command timing and ensures that the | |
489 | * handler and IRQ setup do not race. All IDE command kick off | |
490 | * should go via this function or do equivalent locking. | |
491 | */ | |
cd2a2d96 BZ |
492 | |
493 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
494 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 | 495 | { |
2a2ca6a9 | 496 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 497 | unsigned long flags; |
629f944b | 498 | |
b65fac32 | 499 | spin_lock_irqsave(&hwif->lock, flags); |
629f944b | 500 | __ide_set_handler(drive, handler, timeout, expiry); |
374e042c | 501 | hwif->tp_ops->exec_command(hwif, cmd); |
629f944b BZ |
502 | /* |
503 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
504 | * serviced before that. | |
505 | * | |
506 | * FIXME: we could skip this delay with care on non shared devices | |
507 | */ | |
1da177e4 | 508 | ndelay(400); |
b65fac32 | 509 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 510 | } |
1da177e4 LT |
511 | EXPORT_SYMBOL(ide_execute_command); |
512 | ||
1fc14258 BZ |
513 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
514 | { | |
515 | ide_hwif_t *hwif = drive->hwif; | |
516 | unsigned long flags; | |
517 | ||
b65fac32 | 518 | spin_lock_irqsave(&hwif->lock, flags); |
aaaade3f | 519 | hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); |
1fc14258 | 520 | ndelay(400); |
b65fac32 | 521 | spin_unlock_irqrestore(&hwif->lock, flags); |
1fc14258 BZ |
522 | } |
523 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 524 | |
64a8f00f | 525 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f | 526 | { |
b65fac32 | 527 | struct request *rq = drive->hwif->rq; |
79e36a9f EO |
528 | |
529 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 530 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
531 | } |
532 | ||
1da177e4 LT |
533 | /* needed below */ |
534 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
535 | ||
536 | /* | |
537 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
538 | * during an atapi drive reset operation. If the drive has not yet responded, | |
539 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
540 | * for another 50ms. | |
541 | */ | |
542 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
543 | { | |
b73c7ee2 | 544 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
545 | u8 stat; |
546 | ||
547 | SELECT_DRIVE(drive); | |
548 | udelay (10); | |
374e042c | 549 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 550 | |
3a7d2484 | 551 | if (OK_STAT(stat, 0, ATA_BUSY)) |
4d7bb471 | 552 | printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 553 | else { |
b65fac32 | 554 | if (time_before(jiffies, hwif->poll_timeout)) { |
1da177e4 LT |
555 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
556 | /* continue polling */ | |
557 | return ide_started; | |
558 | } | |
559 | /* end of polling */ | |
b65fac32 | 560 | hwif->polling = 0; |
4d7bb471 BZ |
561 | printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n", |
562 | drive->name, stat); | |
1da177e4 LT |
563 | /* do it the old fashioned way */ |
564 | return do_reset1(drive, 1); | |
565 | } | |
566 | /* done polling */ | |
b65fac32 | 567 | hwif->polling = 0; |
64a8f00f | 568 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
569 | return ide_stopped; |
570 | } | |
571 | ||
0e3d84a5 BZ |
572 | static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) |
573 | { | |
574 | static const char *err_master_vals[] = | |
575 | { NULL, "passed", "formatter device error", | |
576 | "sector buffer error", "ECC circuitry error", | |
577 | "controlling MPU error" }; | |
578 | ||
579 | u8 err_master = err & 0x7f; | |
580 | ||
581 | printk(KERN_ERR "%s: reset: master: ", hwif->name); | |
582 | if (err_master && err_master < 6) | |
583 | printk(KERN_CONT "%s", err_master_vals[err_master]); | |
584 | else | |
585 | printk(KERN_CONT "error (0x%02x?)", err); | |
586 | if (err & 0x80) | |
587 | printk(KERN_CONT "; slave: failed"); | |
588 | printk(KERN_CONT "\n"); | |
589 | } | |
590 | ||
1da177e4 LT |
591 | /* |
592 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
593 | * during an ide reset operation. If the drives have not yet responded, | |
594 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
595 | * for another 50ms. | |
596 | */ | |
597 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
598 | { | |
898ec223 | 599 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 600 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 601 | u8 tmp; |
64a8f00f | 602 | int err = 0; |
1da177e4 | 603 | |
ac95beed | 604 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
605 | err = port_ops->reset_poll(drive); |
606 | if (err) { | |
1da177e4 LT |
607 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
608 | hwif->name, drive->name); | |
79e36a9f | 609 | goto out; |
1da177e4 LT |
610 | } |
611 | } | |
612 | ||
374e042c | 613 | tmp = hwif->tp_ops->read_status(hwif); |
c47137a9 | 614 | |
3a7d2484 | 615 | if (!OK_STAT(tmp, 0, ATA_BUSY)) { |
b65fac32 | 616 | if (time_before(jiffies, hwif->poll_timeout)) { |
1da177e4 LT |
617 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
618 | /* continue polling */ | |
619 | return ide_started; | |
620 | } | |
4d7bb471 BZ |
621 | printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n", |
622 | hwif->name, tmp); | |
1da177e4 | 623 | drive->failures++; |
64a8f00f | 624 | err = -EIO; |
1da177e4 | 625 | } else { |
64a57fe4 BZ |
626 | tmp = ide_read_error(drive); |
627 | ||
628 | if (tmp == 1) { | |
0e3d84a5 | 629 | printk(KERN_INFO "%s: reset: success\n", hwif->name); |
1da177e4 LT |
630 | drive->failures = 0; |
631 | } else { | |
0e3d84a5 | 632 | ide_reset_report_error(hwif, tmp); |
1da177e4 | 633 | drive->failures++; |
64a8f00f | 634 | err = -EIO; |
1da177e4 LT |
635 | } |
636 | } | |
79e36a9f | 637 | out: |
b65fac32 | 638 | hwif->polling = 0; /* done polling */ |
64a8f00f | 639 | ide_complete_drive_reset(drive, err); |
1da177e4 LT |
640 | return ide_stopped; |
641 | } | |
642 | ||
1da177e4 LT |
643 | static void ide_disk_pre_reset(ide_drive_t *drive) |
644 | { | |
4dde4492 | 645 | int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; |
1da177e4 LT |
646 | |
647 | drive->special.all = 0; | |
648 | drive->special.b.set_geometry = legacy; | |
649 | drive->special.b.recalibrate = legacy; | |
97100fc8 | 650 | |
4ee06b7e | 651 | drive->mult_count = 0; |
4abdc6ee | 652 | drive->dev_flags &= ~IDE_DFLAG_PARKED; |
97100fc8 BZ |
653 | |
654 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && | |
655 | (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) | |
1da177e4 | 656 | drive->mult_req = 0; |
97100fc8 | 657 | |
1da177e4 LT |
658 | if (drive->mult_req != drive->mult_count) |
659 | drive->special.b.set_multmode = 1; | |
660 | } | |
661 | ||
662 | static void pre_reset(ide_drive_t *drive) | |
663 | { | |
ac95beed BZ |
664 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
665 | ||
1da177e4 LT |
666 | if (drive->media == ide_disk) |
667 | ide_disk_pre_reset(drive); | |
668 | else | |
97100fc8 | 669 | drive->dev_flags |= IDE_DFLAG_POST_RESET; |
1da177e4 | 670 | |
97100fc8 | 671 | if (drive->dev_flags & IDE_DFLAG_USING_DMA) { |
99ffbe0e | 672 | if (drive->crc_count) |
578cfa0d | 673 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
674 | else |
675 | ide_dma_off(drive); | |
676 | } | |
677 | ||
97100fc8 BZ |
678 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { |
679 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { | |
680 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1da177e4 LT |
681 | drive->io_32bit = 0; |
682 | } | |
683 | return; | |
684 | } | |
1da177e4 | 685 | |
ac95beed BZ |
686 | if (port_ops && port_ops->pre_reset) |
687 | port_ops->pre_reset(drive); | |
1da177e4 | 688 | |
513daadd SS |
689 | if (drive->current_speed != 0xff) |
690 | drive->desired_speed = drive->current_speed; | |
691 | drive->current_speed = 0xff; | |
1da177e4 LT |
692 | } |
693 | ||
694 | /* | |
695 | * do_reset1() attempts to recover a confused drive by resetting it. | |
696 | * Unfortunately, resetting a disk drive actually resets all devices on | |
697 | * the same interface, so it can really be thought of as resetting the | |
698 | * interface rather than resetting the drive. | |
699 | * | |
700 | * ATAPI devices have their own reset mechanism which allows them to be | |
701 | * individually reset without clobbering other devices on the same interface. | |
702 | * | |
703 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
704 | * us know when the reset operation has finished, so we must poll for this. | |
705 | * Equally poor, though, is the fact that this may a very long time to complete, | |
706 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
707 | * we set a timer to poll at 50ms intervals. | |
708 | */ | |
709 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
710 | { | |
2a2ca6a9 | 711 | ide_hwif_t *hwif = drive->hwif; |
2a2ca6a9 BZ |
712 | struct ide_io_ports *io_ports = &hwif->io_ports; |
713 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
ac95beed | 714 | const struct ide_port_ops *port_ops; |
2bd24a1c | 715 | ide_drive_t *tdrive; |
2a2ca6a9 | 716 | unsigned long flags, timeout; |
2bd24a1c | 717 | int i; |
4abdc6ee | 718 | DEFINE_WAIT(wait); |
23579a2a | 719 | |
b65fac32 | 720 | spin_lock_irqsave(&hwif->lock, flags); |
374e042c | 721 | |
1da177e4 | 722 | /* We must not reset with running handlers */ |
b65fac32 | 723 | BUG_ON(hwif->handler != NULL); |
1da177e4 LT |
724 | |
725 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
726 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
727 | pre_reset(drive); | |
728 | SELECT_DRIVE(drive); | |
729 | udelay (20); | |
aaaade3f | 730 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
68ad9910 | 731 | ndelay(400); |
b65fac32 BZ |
732 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
733 | hwif->polling = 1; | |
1da177e4 | 734 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
b65fac32 | 735 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
736 | return ide_started; |
737 | } | |
738 | ||
4abdc6ee EO |
739 | /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ |
740 | do { | |
741 | unsigned long now; | |
742 | ||
743 | prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); | |
744 | timeout = jiffies; | |
7ed5b157 BZ |
745 | ide_port_for_each_present_dev(i, tdrive, hwif) { |
746 | if ((tdrive->dev_flags & IDE_DFLAG_PARKED) && | |
4abdc6ee EO |
747 | time_after(tdrive->sleep, timeout)) |
748 | timeout = tdrive->sleep; | |
749 | } | |
750 | ||
751 | now = jiffies; | |
752 | if (time_before_eq(timeout, now)) | |
753 | break; | |
754 | ||
b65fac32 | 755 | spin_unlock_irqrestore(&hwif->lock, flags); |
4abdc6ee | 756 | timeout = schedule_timeout_uninterruptible(timeout - now); |
b65fac32 | 757 | spin_lock_irqsave(&hwif->lock, flags); |
4abdc6ee EO |
758 | } while (timeout); |
759 | finish_wait(&ide_park_wq, &wait); | |
760 | ||
1da177e4 LT |
761 | /* |
762 | * First, reset any device state data we were maintaining | |
763 | * for any of the drives on this interface. | |
764 | */ | |
2bd24a1c BZ |
765 | ide_port_for_each_dev(i, tdrive, hwif) |
766 | pre_reset(tdrive); | |
1da177e4 | 767 | |
4c3032d8 | 768 | if (io_ports->ctl_addr == 0) { |
b65fac32 | 769 | spin_unlock_irqrestore(&hwif->lock, flags); |
64a8f00f | 770 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
771 | return ide_stopped; |
772 | } | |
773 | ||
774 | /* | |
775 | * Note that we also set nIEN while resetting the device, | |
776 | * to mask unwanted interrupts from the interface during the reset. | |
777 | * However, due to the design of PC hardware, this will cause an | |
778 | * immediate interrupt due to the edge transition it produces. | |
779 | * This single interrupt gives us a "fast poll" for drives that | |
780 | * recover from reset very quickly, saving us the first 50ms wait time. | |
6e6afb3b BZ |
781 | * |
782 | * TODO: add ->softreset method and stop abusing ->set_irq | |
1da177e4 LT |
783 | */ |
784 | /* set SRST and nIEN */ | |
374e042c | 785 | tp_ops->set_irq(hwif, 4); |
1da177e4 LT |
786 | /* more than enough time */ |
787 | udelay(10); | |
6e6afb3b | 788 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
374e042c | 789 | tp_ops->set_irq(hwif, drive->quirk_list == 2); |
1da177e4 LT |
790 | /* more than enough time */ |
791 | udelay(10); | |
b65fac32 BZ |
792 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
793 | hwif->polling = 1; | |
1da177e4 LT |
794 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
795 | ||
796 | /* | |
797 | * Some weird controller like resetting themselves to a strange | |
798 | * state when the disks are reset this way. At least, the Winbond | |
799 | * 553 documentation says that | |
800 | */ | |
ac95beed BZ |
801 | port_ops = hwif->port_ops; |
802 | if (port_ops && port_ops->resetproc) | |
803 | port_ops->resetproc(drive); | |
1da177e4 | 804 | |
b65fac32 | 805 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
806 | return ide_started; |
807 | } | |
808 | ||
809 | /* | |
810 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
811 | */ | |
812 | ||
813 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
814 | { | |
815 | return do_reset1(drive, 0); | |
816 | } | |
817 | ||
818 | EXPORT_SYMBOL(ide_do_reset); | |
819 | ||
820 | /* | |
821 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 822 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
823 | */ |
824 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
825 | { | |
826 | u8 stat = 0; | |
827 | ||
828 | while(timeout--) { | |
829 | /* | |
830 | * Turn this into a schedule() sleep once I'm sure | |
831 | * about locking issues (2.5 work ?). | |
832 | */ | |
833 | mdelay(1); | |
374e042c | 834 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 835 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
836 | return 0; |
837 | /* | |
838 | * Assume a value of 0xff means nothing is connected to | |
839 | * the interface and it doesn't implement the pull-down | |
840 | * resistor on D7. | |
841 | */ | |
842 | if (stat == 0xff) | |
843 | return -ENODEV; | |
6842f8c8 | 844 | touch_softlockup_watchdog(); |
1e86240f | 845 | touch_nmi_watchdog(); |
1da177e4 LT |
846 | } |
847 | return -EBUSY; | |
848 | } |