1 /*
2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
4 *
5 */
6
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>
21 #include <linux/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
24
25 #include <asm/byteorder.h>
26 #include <asm/irq.h>
27 #include <asm/uaccess.h>
28 #include <asm/io.h>
29
SELECT_MASK(ide_drive_t * drive,int mask)30 void SELECT_MASK(ide_drive_t *drive, int mask)
31 {
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);
36 }
37
ide_read_error(ide_drive_t * drive)38 u8 ide_read_error(ide_drive_t *drive)
39 {
40 struct ide_taskfile tf;
41
42 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);
43
44 return tf.error;
45 }
46 EXPORT_SYMBOL_GPL(ide_read_error);
47
ide_fix_driveid(u16 * id)48 void ide_fix_driveid(u16 *id)
49 {
50 #ifndef __LITTLE_ENDIAN
51 # ifdef __BIG_ENDIAN
52 int i;
53
54 for (i = 0; i < 256; i++)
55 id[i] = __le16_to_cpu(id[i]);
56 # else
57 # error "Please fix <asm/byteorder.h>"
58 # endif
59 #endif
60 }
61
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
66 * returned by the ATA_CMD_ID_ATA[PI] commands.
67 */
68
ide_fixstring(u8 * s,const int bytecount,const int byteswap)69 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
70 {
71 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
72
73 if (byteswap) {
74 /* convert from big-endian to host byte order */
75 for (p = s ; p != end ; p += 2)
76 be16_to_cpus((u16 *) p);
77 }
78
79 /* strip leading blanks */
80 p = s;
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 }
92 EXPORT_SYMBOL(ide_fixstring);
93
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
98 * cases return error -- caller may then invoke ide_error().
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 */
__ide_wait_stat(ide_drive_t * drive,u8 good,u8 bad,unsigned long timeout,u8 * rstat)105 int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
106 unsigned long timeout, u8 *rstat)
107 {
108 ide_hwif_t *hwif = drive->hwif;
109 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
110 unsigned long flags;
111 int i;
112 u8 stat;
113
114 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
115 stat = tp_ops->read_status(hwif);
116
117 if (stat & ATA_BUSY) {
118 local_save_flags(flags);
119 local_irq_enable_in_hardirq();
120 timeout += jiffies;
121 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
122 if (time_after(jiffies, timeout)) {
123 /*
124 * One last read after the timeout in case
125 * heavy interrupt load made us not make any
126 * progress during the timeout..
127 */
128 stat = tp_ops->read_status(hwif);
129 if ((stat & ATA_BUSY) == 0)
130 break;
131
132 local_irq_restore(flags);
133 *rstat = stat;
134 return -EBUSY;
135 }
136 }
137 local_irq_restore(flags);
138 }
139 /*
140 * Allow status to settle, then read it again.
141 * A few rare drives vastly violate the 400ns spec here,
142 * so we'll wait up to 10usec for a "good" status
143 * rather than expensively fail things immediately.
144 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
145 */
146 for (i = 0; i < 10; i++) {
147 udelay(1);
148 stat = tp_ops->read_status(hwif);
149
150 if (OK_STAT(stat, good, bad)) {
151 *rstat = stat;
152 return 0;
153 }
154 }
155 *rstat = stat;
156 return -EFAULT;
157 }
158
159 /*
160 * In case of error returns error value after doing "*startstop = ide_error()".
161 * The caller should return the updated value of "startstop" in this case,
162 * "startstop" is unchanged when the function returns 0.
163 */
ide_wait_stat(ide_startstop_t * startstop,ide_drive_t * drive,u8 good,u8 bad,unsigned long timeout)164 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
165 u8 bad, unsigned long timeout)
166 {
167 int err;
168 u8 stat;
169
170 /* bail early if we've exceeded max_failures */
171 if (drive->max_failures && (drive->failures > drive->max_failures)) {
172 *startstop = ide_stopped;
173 return 1;
174 }
175
176 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
177
178 if (err) {
179 char *s = (err == -EBUSY) ? "status timeout" : "status error";
180 *startstop = ide_error(drive, s, stat);
181 }
182
183 return err;
184 }
185 EXPORT_SYMBOL(ide_wait_stat);
186
187 /**
188 * ide_in_drive_list - look for drive in black/white list
189 * @id: drive identifier
190 * @table: list to inspect
191 *
192 * Look for a drive in the blacklist and the whitelist tables
193 * Returns 1 if the drive is found in the table.
194 */
195
ide_in_drive_list(u16 * id,const struct drive_list_entry * table)196 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
197 {
198 for ( ; table->id_model; table++)
199 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
200 (!table->id_firmware ||
201 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
202 return 1;
203 return 0;
204 }
205 EXPORT_SYMBOL_GPL(ide_in_drive_list);
206
207 /*
208 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
209 * Some optical devices with the buggy firmwares have the same problem.
210 */
211 static const struct drive_list_entry ivb_list[] = {
212 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
213 { "QUANTUM FIREBALLlct20 30" , "APL.0900" },
214 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
215 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
216 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
217 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
218 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
219 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
220 { "SAMSUNG SP0822N" , "WA100-10" },
221 { NULL , NULL }
222 };
223
224 /*
225 * All hosts that use the 80c ribbon must use!
226 * The name is derived from upper byte of word 93 and the 80c ribbon.
227 */
eighty_ninty_three(ide_drive_t * drive)228 u8 eighty_ninty_three(ide_drive_t *drive)
229 {
230 ide_hwif_t *hwif = drive->hwif;
231 u16 *id = drive->id;
232 int ivb = ide_in_drive_list(id, ivb_list);
233
234 if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT)
235 return 1;
236
237 if (ivb)
238 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
239 drive->name);
240
241 if (ata_id_is_sata(id) && !ivb)
242 return 1;
243
244 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
245 goto no_80w;
246
247 /*
248 * FIXME:
249 * - change master/slave IDENTIFY order
250 * - force bit13 (80c cable present) check also for !ivb devices
251 * (unless the slave device is pre-ATA3)
252 */
253 if (id[ATA_ID_HW_CONFIG] & 0x4000)
254 return 1;
255
256 if (ivb) {
257 const char *model = (char *)&id[ATA_ID_PROD];
258
259 if (strstr(model, "TSSTcorp CDDVDW SH-S202")) {
260 /*
261 * These ATAPI devices always report 80c cable
262 * so we have to depend on the host in this case.
263 */
264 if (hwif->cbl == ATA_CBL_PATA80)
265 return 1;
266 } else {
267 /* Depend on the device side cable detection. */
268 if (id[ATA_ID_HW_CONFIG] & 0x2000)
269 return 1;
270 }
271 }
272 no_80w:
273 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
274 return 0;
275
276 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
277 "limiting max speed to UDMA33\n",
278 drive->name,
279 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
280
281 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
282
283 return 0;
284 }
285
286 static const char *nien_quirk_list[] = {
287 "QUANTUM FIREBALLlct08 08",
288 "QUANTUM FIREBALLP KA6.4",
289 "QUANTUM FIREBALLP KA9.1",
290 "QUANTUM FIREBALLP KX13.6",
291 "QUANTUM FIREBALLP KX20.5",
292 "QUANTUM FIREBALLP KX27.3",
293 "QUANTUM FIREBALLP LM20.4",
294 "QUANTUM FIREBALLP LM20.5",
295 "FUJITSU MHZ2160BH G2",
296 NULL
297 };
298
ide_check_nien_quirk_list(ide_drive_t * drive)299 void ide_check_nien_quirk_list(ide_drive_t *drive)
300 {
301 const char **list, *m = (char *)&drive->id[ATA_ID_PROD];
302
303 for (list = nien_quirk_list; *list != NULL; list++)
304 if (strstr(m, *list) != NULL) {
305 drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK;
306 return;
307 }
308 }
309
ide_driveid_update(ide_drive_t * drive)310 int ide_driveid_update(ide_drive_t *drive)
311 {
312 u16 *id;
313 int rc;
314
315 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
316 if (id == NULL)
317 return 0;
318
319 SELECT_MASK(drive, 1);
320 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1);
321 SELECT_MASK(drive, 0);
322
323 if (rc)
324 goto out_err;
325
326 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
327 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
328 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
329 drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES];
330 /* anything more ? */
331
332 kfree(id);
333
334 return 1;
335 out_err:
336 if (rc == 2)
337 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
338 kfree(id);
339 return 0;
340 }
341
ide_config_drive_speed(ide_drive_t * drive,u8 speed)342 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
343 {
344 ide_hwif_t *hwif = drive->hwif;
345 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
346 struct ide_taskfile tf;
347 u16 *id = drive->id, i;
348 int error = 0;
349 u8 stat;
350
351 #ifdef CONFIG_BLK_DEV_IDEDMA
352 if (hwif->dma_ops) /* check if host supports DMA */
353 hwif->dma_ops->dma_host_set(drive, 0);
354 #endif
355
356 /* Skip setting PIO flow-control modes on pre-EIDE drives */
357 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
358 goto skip;
359
360 /*
361 * Don't use ide_wait_cmd here - it will
362 * attempt to set_geometry and recalibrate,
363 * but for some reason these don't work at
364 * this point (lost interrupt).
365 */
366
367 udelay(1);
368 tp_ops->dev_select(drive);
369 SELECT_MASK(drive, 1);
370 udelay(1);
371 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
372
373 memset(&tf, 0, sizeof(tf));
374 tf.feature = SETFEATURES_XFER;
375 tf.nsect = speed;
376
377 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT);
378
379 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
380
381 if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK)
382 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
383
384 error = __ide_wait_stat(drive, drive->ready_stat,
385 ATA_BUSY | ATA_DRQ | ATA_ERR,
386 WAIT_CMD, &stat);
387
388 SELECT_MASK(drive, 0);
389
390 if (error) {
391 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
392 return error;
393 }
394
395 if (speed >= XFER_SW_DMA_0) {
396 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
397 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
398 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
399 if (ata_id_is_cfa(id))
400 id[ATA_ID_CFA_MODES] &= ~0x0E00;
401 } else if (ata_id_is_cfa(id))
402 id[ATA_ID_CFA_MODES] &= ~0x01C0;
403
404 skip:
405 #ifdef CONFIG_BLK_DEV_IDEDMA
406 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
407 hwif->dma_ops->dma_host_set(drive, 1);
408 else if (hwif->dma_ops) /* check if host supports DMA */
409 ide_dma_off_quietly(drive);
410 #endif
411
412 if (speed >= XFER_UDMA_0) {
413 i = 1 << (speed - XFER_UDMA_0);
414 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
415 } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
416 i = speed - XFER_MW_DMA_2;
417 id[ATA_ID_CFA_MODES] |= i << 9;
418 } else if (speed >= XFER_MW_DMA_0) {
419 i = 1 << (speed - XFER_MW_DMA_0);
420 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
421 } else if (speed >= XFER_SW_DMA_0) {
422 i = 1 << (speed - XFER_SW_DMA_0);
423 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
424 } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
425 i = speed - XFER_PIO_4;
426 id[ATA_ID_CFA_MODES] |= i << 6;
427 }
428
429 if (!drive->init_speed)
430 drive->init_speed = speed;
431 drive->current_speed = speed;
432 return error;
433 }
434
435 /*
436 * This should get invoked any time we exit the driver to
437 * wait for an interrupt response from a drive. handler() points
438 * at the appropriate code to handle the next interrupt, and a
439 * timer is started to prevent us from waiting forever in case
440 * something goes wrong (see the ide_timer_expiry() handler later on).
441 *
442 * See also ide_execute_command
443 */
__ide_set_handler(ide_drive_t * drive,ide_handler_t * handler,unsigned int timeout)444 void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
445 unsigned int timeout)
446 {
447 ide_hwif_t *hwif = drive->hwif;
448
449 BUG_ON(hwif->handler);
450 hwif->handler = handler;
451 hwif->timer.expires = jiffies + timeout;
452 hwif->req_gen_timer = hwif->req_gen;
453 add_timer(&hwif->timer);
454 }
455
ide_set_handler(ide_drive_t * drive,ide_handler_t * handler,unsigned int timeout)456 void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
457 unsigned int timeout)
458 {
459 ide_hwif_t *hwif = drive->hwif;
460 unsigned long flags;
461
462 spin_lock_irqsave(&hwif->lock, flags);
463 __ide_set_handler(drive, handler, timeout);
464 spin_unlock_irqrestore(&hwif->lock, flags);
465 }
466 EXPORT_SYMBOL(ide_set_handler);
467
468 /**
469 * ide_execute_command - execute an IDE command
470 * @drive: IDE drive to issue the command against
471 * @cmd: command
472 * @handler: handler for next phase
473 * @timeout: timeout for command
474 *
475 * Helper function to issue an IDE command. This handles the
476 * atomicity requirements, command timing and ensures that the
477 * handler and IRQ setup do not race. All IDE command kick off
478 * should go via this function or do equivalent locking.
479 */
480
ide_execute_command(ide_drive_t * drive,struct ide_cmd * cmd,ide_handler_t * handler,unsigned timeout)481 void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
482 ide_handler_t *handler, unsigned timeout)
483 {
484 ide_hwif_t *hwif = drive->hwif;
485 unsigned long flags;
486
487 spin_lock_irqsave(&hwif->lock, flags);
488 if ((cmd->protocol != ATAPI_PROT_DMA &&
489 cmd->protocol != ATAPI_PROT_PIO) ||
490 (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
491 __ide_set_handler(drive, handler, timeout);
492 hwif->tp_ops->exec_command(hwif, cmd->tf.command);
493 /*
494 * Drive takes 400nS to respond, we must avoid the IRQ being
495 * serviced before that.
496 *
497 * FIXME: we could skip this delay with care on non shared devices
498 */
499 ndelay(400);
500 spin_unlock_irqrestore(&hwif->lock, flags);
501 }
502
503 /*
504 * ide_wait_not_busy() waits for the currently selected device on the hwif
505 * to report a non-busy status, see comments in ide_probe_port().
506 */
ide_wait_not_busy(ide_hwif_t * hwif,unsigned long timeout)507 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
508 {
509 u8 stat = 0;
510
511 while (timeout--) {
512 /*
513 * Turn this into a schedule() sleep once I'm sure
514 * about locking issues (2.5 work ?).
515 */
516 mdelay(1);
517 stat = hwif->tp_ops->read_status(hwif);
518 if ((stat & ATA_BUSY) == 0)
519 return 0;
520 /*
521 * Assume a value of 0xff means nothing is connected to
522 * the interface and it doesn't implement the pull-down
523 * resistor on D7.
524 */
525 if (stat == 0xff)
526 return -ENODEV;
527 touch_softlockup_watchdog();
528 touch_nmi_watchdog();
529 }
530 return -EBUSY;
531 }
532