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ide-cd: remove dead code from cdrom_decode_status()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob4a289711c551ef9bea282052a20b7a920fbc11e6
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 get_device(&cd->dev);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 put_device(&cd->dev);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 switch (sense->sense_key) {
106 case NO_SENSE:
107 case RECOVERED_ERROR:
108 break;
109 case NOT_READY:
110 /*
111 * don't care about tray state messages for e.g. capacity
112 * commands or in-progress or becoming ready
113 */
114 if (sense->asc == 0x3a || sense->asc == 0x04)
115 break;
116 log = 1;
117 break;
118 case ILLEGAL_REQUEST:
119 /*
120 * don't log START_STOP unit with LoEj set, since we cannot
121 * reliably check if drive can auto-close
122 */
123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124 break;
125 log = 1;
126 break;
127 case UNIT_ATTENTION:
128 /*
129 * Make good and sure we've seen this potential media change.
130 * Some drives (i.e. Creative) fail to present the correct sense
131 * key in the error register.
132 */
133 cdrom_saw_media_change(drive);
134 break;
135 default:
136 log = 1;
137 break;
138 }
139 return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143 struct request *failed_command,
144 struct request_sense *sense)
145 {
146 unsigned long sector;
147 unsigned long bio_sectors;
148 struct cdrom_info *info = drive->driver_data;
149
150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151 sense->error_code, sense->sense_key);
152
153 if (failed_command)
154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155 failed_command->cmd[0]);
156
157 if (!cdrom_log_sense(drive, failed_command, sense))
158 return;
159
160 /*
161 * If a read toc is executed for a CD-R or CD-RW medium where the first
162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163 * confusing error)
164 */
165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167 return;
168
169 /* current error */
170 if (sense->error_code == 0x70) {
171 switch (sense->sense_key) {
172 case MEDIUM_ERROR:
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
175 if (!sense->valid)
176 break;
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
179 break;
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
184
185 if (drive->queue->hardsect_size == 2048)
186 /* device sector size is 2K */
187 sector <<= 2;
188
189 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190 sector &= ~(bio_sectors - 1);
191
192 /*
193 * The SCSI specification allows for the value
194 * returned by READ CAPACITY to be up to 75 2K
195 * sectors past the last readable block.
196 * Therefore, if we hit a medium error within the
197 * last 75 2K sectors, we decrease the saved size
198 * value.
199 */
200 if (sector < get_capacity(info->disk) &&
201 drive->probed_capacity - sector < 4 * 75)
202 set_capacity(info->disk, sector);
203 }
204 }
205
206 ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
210 struct request *failed_command)
211 {
212 struct cdrom_info *info = drive->driver_data;
213 struct request *rq = &drive->request_sense_rq;
214
215 ide_debug_log(IDE_DBG_SENSE, "enter");
216
217 if (sense == NULL)
218 sense = &info->sense_data;
219
220 /* stuff the sense request in front of our current request */
221 blk_rq_init(NULL, rq);
222 rq->cmd_type = REQ_TYPE_ATA_PC;
223 rq->rq_disk = info->disk;
224
225 rq->data = sense;
226 rq->cmd[0] = GPCMD_REQUEST_SENSE;
227 rq->cmd[4] = 18;
228 rq->data_len = 18;
229
230 rq->cmd_type = REQ_TYPE_SENSE;
231 rq->cmd_flags |= REQ_PREEMPT;
232
233 /* NOTE! Save the failed command in "rq->buffer" */
234 rq->buffer = (void *) failed_command;
235
236 if (failed_command)
237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
238 failed_command->cmd[0]);
239
240 drive->hwif->rq = NULL;
241
242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
243 }
244
245 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
246 {
247 struct request *rq = drive->hwif->rq;
248 int nsectors = rq->hard_cur_sectors;
249
250 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
251 rq->cmd[0], uptodate, nsectors);
252
253 if (blk_sense_request(rq) && uptodate) {
254 /*
255 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
256 * failed request
257 */
258 struct request *failed = (struct request *) rq->buffer;
259 struct cdrom_info *info = drive->driver_data;
260 void *sense = &info->sense_data;
261
262 if (failed) {
263 if (failed->sense) {
264 sense = failed->sense;
265 failed->sense_len = rq->sense_len;
266 }
267 cdrom_analyze_sense_data(drive, failed, sense);
268
269 if (ide_end_rq(drive, failed, -EIO,
270 blk_rq_bytes(failed)))
271 BUG();
272 } else
273 cdrom_analyze_sense_data(drive, NULL, sense);
274 }
275
276 if (!rq->current_nr_sectors && blk_fs_request(rq))
277 uptodate = 1;
278 /* make sure it's fully ended */
279 if (blk_pc_request(rq))
280 nsectors = (rq->data_len + 511) >> 9;
281 if (!nsectors)
282 nsectors = 1;
283
284 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
285 uptodate, nsectors);
286
287 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
288 rq->errors = -EIO;
289
290 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
291 }
292
293 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
294 {
295 if (st & 0x80)
296 return;
297 ide_dump_status(drive, msg, st);
298 }
299
300 /*
301 * Returns:
302 * 0: if the request should be continued.
303 * 1: if the request was ended.
304 */
305 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
306 {
307 ide_hwif_t *hwif = drive->hwif;
308 struct request *rq = hwif->rq;
309 int stat, err, sense_key;
310
311 /* check for errors */
312 stat = hwif->tp_ops->read_status(hwif);
313
314 if (stat_ret)
315 *stat_ret = stat;
316
317 if (OK_STAT(stat, good_stat, BAD_R_STAT))
318 return 0;
319
320 /* get the IDE error register */
321 err = ide_read_error(drive);
322 sense_key = err >> 4;
323
324 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
325 "rq->cmd_type: 0x%x, err: 0x%x",
326 stat, good_stat, rq->cmd[0], rq->cmd_type,
327 err);
328
329 if (blk_sense_request(rq)) {
330 /*
331 * We got an error trying to get sense info from the drive
332 * (probably while trying to recover from a former error).
333 * Just give up.
334 */
335 rq->cmd_flags |= REQ_FAILED;
336 cdrom_end_request(drive, 0);
337 ide_error(drive, "request sense failure", stat);
338 return 1;
339
340 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
341 /* All other functions, except for READ. */
342
343 /*
344 * if we have an error, pass back CHECK_CONDITION as the
345 * scsi status byte
346 */
347 if (blk_pc_request(rq) && !rq->errors)
348 rq->errors = SAM_STAT_CHECK_CONDITION;
349
350 /* check for tray open */
351 if (sense_key == NOT_READY) {
352 cdrom_saw_media_change(drive);
353 } else if (sense_key == UNIT_ATTENTION) {
354 /* check for media change */
355 cdrom_saw_media_change(drive);
356 return 0;
357 } else if (sense_key == ILLEGAL_REQUEST &&
358 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
359 /*
360 * Don't print error message for this condition--
361 * SFF8090i indicates that 5/24/00 is the correct
362 * response to a request to close the tray if the
363 * drive doesn't have that capability.
364 * cdrom_log_sense() knows this!
365 */
366 } else if (!(rq->cmd_flags & REQ_QUIET)) {
367 /* otherwise, print an error */
368 ide_dump_status(drive, "packet command error", stat);
369 }
370
371 rq->cmd_flags |= REQ_FAILED;
372
373 /*
374 * instead of playing games with moving completions around,
375 * remove failed request completely and end it when the
376 * request sense has completed
377 */
378 goto end_request;
379
380 } else if (blk_fs_request(rq)) {
381 int do_end_request = 0;
382
383 /* handle errors from READ and WRITE requests */
384
385 if (blk_noretry_request(rq))
386 do_end_request = 1;
387
388 if (sense_key == NOT_READY) {
389 /* tray open */
390 if (rq_data_dir(rq) == READ) {
391 cdrom_saw_media_change(drive);
392
393 /* fail the request */
394 printk(KERN_ERR PFX "%s: tray open\n",
395 drive->name);
396 do_end_request = 1;
397 } else {
398 struct cdrom_info *info = drive->driver_data;
399
400 /*
401 * Allow the drive 5 seconds to recover, some
402 * devices will return this error while flushing
403 * data from cache.
404 */
405 if (!rq->errors)
406 info->write_timeout = jiffies +
407 ATAPI_WAIT_WRITE_BUSY;
408 rq->errors = 1;
409 if (time_after(jiffies, info->write_timeout))
410 do_end_request = 1;
411 else {
412 struct request_queue *q = drive->queue;
413 unsigned long flags;
414
415 /*
416 * take a breather relying on the unplug
417 * timer to kick us again
418 */
419 spin_lock_irqsave(q->queue_lock, flags);
420 blk_plug_device(q);
421 spin_unlock_irqrestore(q->queue_lock, flags);
422
423 return 1;
424 }
425 }
426 } else if (sense_key == UNIT_ATTENTION) {
427 /* media change */
428 cdrom_saw_media_change(drive);
429
430 /*
431 * Arrange to retry the request but be sure to give up
432 * if we've retried too many times.
433 */
434 if (++rq->errors > ERROR_MAX)
435 do_end_request = 1;
436 } else if (sense_key == ILLEGAL_REQUEST ||
437 sense_key == DATA_PROTECT) {
438 /*
439 * No point in retrying after an illegal request or data
440 * protect error.
441 */
442 ide_dump_status_no_sense(drive, "command error", stat);
443 do_end_request = 1;
444 } else if (sense_key == MEDIUM_ERROR) {
445 /*
446 * No point in re-trying a zillion times on a bad
447 * sector. If we got here the error is not correctable.
448 */
449 ide_dump_status_no_sense(drive,
450 "media error (bad sector)",
451 stat);
452 do_end_request = 1;
453 } else if (sense_key == BLANK_CHECK) {
454 /* disk appears blank ?? */
455 ide_dump_status_no_sense(drive, "media error (blank)",
456 stat);
457 do_end_request = 1;
458 } else if ((err & ~ATA_ABORTED) != 0) {
459 /* go to the default handler for other errors */
460 ide_error(drive, "cdrom_decode_status", stat);
461 return 1;
462 } else if ((++rq->errors > ERROR_MAX)) {
463 /* we've racked up too many retries, abort */
464 do_end_request = 1;
465 }
466
467 /*
468 * End a request through request sense analysis when we have
469 * sense data. We need this in order to perform end of media
470 * processing.
471 */
472 if (do_end_request)
473 goto end_request;
474
475 /*
476 * If we got a CHECK_CONDITION status, queue
477 * a request sense command.
478 */
479 if (stat & ATA_ERR)
480 cdrom_queue_request_sense(drive, NULL, NULL);
481 } else {
482 blk_dump_rq_flags(rq, PFX "bad rq");
483 cdrom_end_request(drive, 0);
484 }
485
486 /* retry, or handle the next request */
487 return 1;
488
489 end_request:
490 if (stat & ATA_ERR) {
491 struct request_queue *q = drive->queue;
492 unsigned long flags;
493
494 spin_lock_irqsave(q->queue_lock, flags);
495 blkdev_dequeue_request(rq);
496 spin_unlock_irqrestore(q->queue_lock, flags);
497
498 hwif->rq = NULL;
499
500 cdrom_queue_request_sense(drive, rq->sense, rq);
501 } else
502 cdrom_end_request(drive, 0);
503
504 return 1;
505 }
506
507 /*
508 * Check the contents of the interrupt reason register from the cdrom
509 * and attempt to recover if there are problems. Returns 0 if everything's
510 * ok; nonzero if the request has been terminated.
511 */
512 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
513 int len, int ireason, int rw)
514 {
515 ide_hwif_t *hwif = drive->hwif;
516
517 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
518
519 /*
520 * ireason == 0: the drive wants to receive data from us
521 * ireason == 2: the drive is expecting to transfer data to us
522 */
523 if (ireason == (!rw << 1))
524 return 0;
525 else if (ireason == (rw << 1)) {
526
527 /* whoops... */
528 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
529 drive->name, __func__);
530
531 ide_pad_transfer(drive, rw, len);
532 } else if (rw == 0 && ireason == 1) {
533 /*
534 * Some drives (ASUS) seem to tell us that status info is
535 * available. Just get it and ignore.
536 */
537 (void)hwif->tp_ops->read_status(hwif);
538 return 0;
539 } else {
540 /* drive wants a command packet, or invalid ireason... */
541 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
542 drive->name, __func__, ireason);
543 }
544
545 if (rq->cmd_type == REQ_TYPE_ATA_PC)
546 rq->cmd_flags |= REQ_FAILED;
547
548 cdrom_end_request(drive, 0);
549 return -1;
550 }
551
552 /*
553 * Assume that the drive will always provide data in multiples of at least
554 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
555 */
556 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
557 {
558 ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
559
560 if ((len % SECTOR_SIZE) == 0)
561 return 0;
562
563 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
564 __func__, len);
565
566 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
567 printk(KERN_ERR PFX "This drive is not supported by this "
568 "version of the driver\n");
569 else {
570 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
571 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
572 }
573
574 return 1;
575 }
576
577 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
578 struct request *rq)
579 {
580 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
581
582 if (rq_data_dir(rq) == READ) {
583 unsigned short sectors_per_frame =
584 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
585 int nskip = rq->sector & (sectors_per_frame - 1);
586
587 /*
588 * If the requested sector doesn't start on a frame boundary,
589 * we must adjust the start of the transfer so that it does,
590 * and remember to skip the first few sectors.
591 *
592 * If the rq->current_nr_sectors field is larger than the size
593 * of the buffer, it will mean that we're to skip a number of
594 * sectors equal to the amount by which rq->current_nr_sectors
595 * is larger than the buffer size.
596 */
597 if (nskip > 0) {
598 /* sanity check... */
599 if (rq->current_nr_sectors !=
600 bio_cur_sectors(rq->bio)) {
601 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
602 drive->name, __func__,
603 rq->current_nr_sectors);
604 cdrom_end_request(drive, 0);
605 return ide_stopped;
606 }
607 rq->current_nr_sectors += nskip;
608 }
609 }
610
611 /* set up the command */
612 rq->timeout = ATAPI_WAIT_PC;
613
614 return ide_started;
615 }
616
617 /*
618 * Fix up a possibly partially-processed request so that we can start it over
619 * entirely, or even put it back on the request queue.
620 */
621 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
622 {
623
624 ide_debug_log(IDE_DBG_FUNC, "enter");
625
626 if (rq->buffer != bio_data(rq->bio)) {
627 sector_t n =
628 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
629
630 rq->buffer = bio_data(rq->bio);
631 rq->nr_sectors += n;
632 rq->sector -= n;
633 }
634 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
635 rq->hard_cur_sectors = rq->current_nr_sectors;
636 rq->hard_nr_sectors = rq->nr_sectors;
637 rq->hard_sector = rq->sector;
638 rq->q->prep_rq_fn(rq->q, rq);
639 }
640
641 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
642 {
643 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
644
645 /*
646 * Some of the trailing request sense fields are optional,
647 * and some drives don't send them. Sigh.
648 */
649 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
650 rq->data_len > 0 && rq->data_len <= 5)
651 while (rq->data_len > 0) {
652 *(u8 *)rq->data++ = 0;
653 --rq->data_len;
654 }
655 }
656
657 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
658 int write, void *buffer, unsigned *bufflen,
659 struct request_sense *sense, int timeout,
660 unsigned int cmd_flags)
661 {
662 struct cdrom_info *info = drive->driver_data;
663 struct request_sense local_sense;
664 int retries = 10;
665 unsigned int flags = 0;
666
667 if (!sense)
668 sense = &local_sense;
669
670 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
671 "cmd_flags: 0x%x",
672 cmd[0], write, timeout, cmd_flags);
673
674 /* start of retry loop */
675 do {
676 struct request *rq;
677 int error;
678
679 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
680
681 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
682 rq->cmd_type = REQ_TYPE_ATA_PC;
683 rq->sense = sense;
684 rq->cmd_flags |= cmd_flags;
685 rq->timeout = timeout;
686 if (buffer) {
687 rq->data = buffer;
688 rq->data_len = *bufflen;
689 }
690
691 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
692
693 if (buffer)
694 *bufflen = rq->data_len;
695
696 flags = rq->cmd_flags;
697 blk_put_request(rq);
698
699 /*
700 * FIXME: we should probably abort/retry or something in case of
701 * failure.
702 */
703 if (flags & REQ_FAILED) {
704 /*
705 * The request failed. Retry if it was due to a unit
706 * attention status (usually means media was changed).
707 */
708 struct request_sense *reqbuf = sense;
709
710 if (reqbuf->sense_key == UNIT_ATTENTION)
711 cdrom_saw_media_change(drive);
712 else if (reqbuf->sense_key == NOT_READY &&
713 reqbuf->asc == 4 && reqbuf->ascq != 4) {
714 /*
715 * The drive is in the process of loading
716 * a disk. Retry, but wait a little to give
717 * the drive time to complete the load.
718 */
719 ssleep(2);
720 } else {
721 /* otherwise, don't retry */
722 retries = 0;
723 }
724 --retries;
725 }
726
727 /* end of retry loop */
728 } while ((flags & REQ_FAILED) && retries >= 0);
729
730 /* return an error if the command failed */
731 return (flags & REQ_FAILED) ? -EIO : 0;
732 }
733
734 /*
735 * Called from blk_end_request_callback() after the data of the request is
736 * completed and before the request itself is completed. By returning value '1',
737 * blk_end_request_callback() returns immediately without completing it.
738 */
739 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
740 {
741 return 1;
742 }
743
744 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
745 {
746 ide_hwif_t *hwif = drive->hwif;
747 struct request *rq = hwif->rq;
748 xfer_func_t *xferfunc;
749 ide_expiry_t *expiry = NULL;
750 int dma_error = 0, dma, stat, thislen, uptodate = 0;
751 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
752 unsigned int timeout;
753 u16 len;
754 u8 ireason;
755
756 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
757 rq->cmd[0], write);
758
759 /* check for errors */
760 dma = drive->dma;
761 if (dma) {
762 drive->dma = 0;
763 dma_error = hwif->dma_ops->dma_end(drive);
764 if (dma_error) {
765 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
766 write ? "write" : "read");
767 ide_dma_off(drive);
768 }
769 }
770
771 if (cdrom_decode_status(drive, 0, &stat))
772 return ide_stopped;
773
774 /* using dma, transfer is complete now */
775 if (dma) {
776 if (dma_error)
777 return ide_error(drive, "dma error", stat);
778 if (blk_fs_request(rq)) {
779 ide_complete_rq(drive, 0, rq->nr_sectors
780 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
781 return ide_stopped;
782 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
783 ide_complete_rq(drive, 0, 512);
784 return ide_stopped;
785 }
786 goto end_request;
787 }
788
789 ide_read_bcount_and_ireason(drive, &len, &ireason);
790
791 thislen = blk_fs_request(rq) ? len : rq->data_len;
792 if (thislen > len)
793 thislen = len;
794
795 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
796 stat, thislen);
797
798 /* If DRQ is clear, the command has completed. */
799 if ((stat & ATA_DRQ) == 0) {
800 if (blk_fs_request(rq)) {
801 /*
802 * If we're not done reading/writing, complain.
803 * Otherwise, complete the command normally.
804 */
805 uptodate = 1;
806 if (rq->current_nr_sectors > 0) {
807 printk(KERN_ERR PFX "%s: %s: data underrun "
808 "(%d blocks)\n",
809 drive->name, __func__,
810 rq->current_nr_sectors);
811 if (!write)
812 rq->cmd_flags |= REQ_FAILED;
813 uptodate = 0;
814 }
815 cdrom_end_request(drive, uptodate);
816 return ide_stopped;
817 } else if (!blk_pc_request(rq)) {
818 ide_cd_request_sense_fixup(drive, rq);
819 /* complain if we still have data left to transfer */
820 uptodate = rq->data_len ? 0 : 1;
821 }
822 goto end_request;
823 }
824
825 /* check which way to transfer data */
826 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
827 return ide_stopped;
828
829 if (blk_fs_request(rq)) {
830 if (write == 0) {
831 int nskip;
832
833 if (ide_cd_check_transfer_size(drive, len)) {
834 cdrom_end_request(drive, 0);
835 return ide_stopped;
836 }
837
838 /*
839 * First, figure out if we need to bit-bucket
840 * any of the leading sectors.
841 */
842 nskip = min_t(int, rq->current_nr_sectors
843 - bio_cur_sectors(rq->bio),
844 thislen >> 9);
845 if (nskip > 0) {
846 ide_pad_transfer(drive, write, nskip << 9);
847 rq->current_nr_sectors -= nskip;
848 thislen -= (nskip << 9);
849 }
850 }
851 }
852
853 if (ireason == 0) {
854 write = 1;
855 xferfunc = hwif->tp_ops->output_data;
856 } else {
857 write = 0;
858 xferfunc = hwif->tp_ops->input_data;
859 }
860
861 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
862 "ireason: 0x%x",
863 rq->cmd_type, ireason);
864
865 /* transfer data */
866 while (thislen > 0) {
867 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
868 int blen = rq->data_len;
869
870 /* bio backed? */
871 if (rq->bio) {
872 if (blk_fs_request(rq)) {
873 ptr = rq->buffer;
874 blen = rq->current_nr_sectors << 9;
875 } else {
876 ptr = bio_data(rq->bio);
877 blen = bio_iovec(rq->bio)->bv_len;
878 }
879 }
880
881 if (!ptr) {
882 if (blk_fs_request(rq) && !write)
883 /*
884 * If the buffers are full, pipe the rest into
885 * oblivion.
886 */
887 ide_pad_transfer(drive, 0, thislen);
888 else {
889 printk(KERN_ERR PFX "%s: confused, missing data\n",
890 drive->name);
891 blk_dump_rq_flags(rq, rq_data_dir(rq)
892 ? "cdrom_newpc_intr, write"
893 : "cdrom_newpc_intr, read");
894 }
895 break;
896 }
897
898 if (blen > thislen)
899 blen = thislen;
900
901 xferfunc(drive, NULL, ptr, blen);
902
903 thislen -= blen;
904 len -= blen;
905
906 if (blk_fs_request(rq)) {
907 rq->buffer += blen;
908 rq->nr_sectors -= (blen >> 9);
909 rq->current_nr_sectors -= (blen >> 9);
910 rq->sector += (blen >> 9);
911
912 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
913 cdrom_end_request(drive, 1);
914 } else {
915 rq->data_len -= blen;
916
917 /*
918 * The request can't be completed until DRQ is cleared.
919 * So complete the data, but don't complete the request
920 * using the dummy function for the callback feature
921 * of blk_end_request_callback().
922 */
923 if (rq->bio)
924 blk_end_request_callback(rq, 0, blen,
925 cdrom_newpc_intr_dummy_cb);
926 else
927 rq->data += blen;
928 }
929 if (!write && blk_sense_request(rq))
930 rq->sense_len += blen;
931 }
932
933 /* pad, if necessary */
934 if (!blk_fs_request(rq) && len > 0)
935 ide_pad_transfer(drive, write, len);
936
937 if (blk_pc_request(rq)) {
938 timeout = rq->timeout;
939 } else {
940 timeout = ATAPI_WAIT_PC;
941 if (!blk_fs_request(rq))
942 expiry = ide_cd_expiry;
943 }
944
945 hwif->expiry = expiry;
946 ide_set_handler(drive, cdrom_newpc_intr, timeout);
947 return ide_started;
948
949 end_request:
950 if (blk_pc_request(rq)) {
951 unsigned int dlen = rq->data_len;
952
953 if (dma)
954 rq->data_len = 0;
955
956 if (blk_end_request(rq, 0, dlen))
957 BUG();
958
959 hwif->rq = NULL;
960 } else {
961 if (!uptodate)
962 rq->cmd_flags |= REQ_FAILED;
963 cdrom_end_request(drive, uptodate);
964 }
965 return ide_stopped;
966 }
967
968 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
969 {
970 struct cdrom_info *cd = drive->driver_data;
971 int write = rq_data_dir(rq) == WRITE;
972 unsigned short sectors_per_frame =
973 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
974
975 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
976 "secs_per_frame: %u",
977 rq->cmd[0], write, sectors_per_frame);
978
979 if (write) {
980 /* disk has become write protected */
981 if (get_disk_ro(cd->disk)) {
982 cdrom_end_request(drive, 0);
983 return ide_stopped;
984 }
985 } else {
986 /*
987 * We may be retrying this request after an error. Fix up any
988 * weirdness which might be present in the request packet.
989 */
990 ide_cd_restore_request(drive, rq);
991 }
992
993 /* use DMA, if possible / writes *must* be hardware frame aligned */
994 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
995 (rq->sector & (sectors_per_frame - 1))) {
996 if (write) {
997 cdrom_end_request(drive, 0);
998 return ide_stopped;
999 }
1000 drive->dma = 0;
1001 } else
1002 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1003
1004 if (write)
1005 cd->devinfo.media_written = 1;
1006
1007 return ide_started;
1008 }
1009
1010 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1011 {
1012
1013 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1014 rq->cmd[0], rq->cmd_type);
1015
1016 if (blk_pc_request(rq))
1017 rq->cmd_flags |= REQ_QUIET;
1018 else
1019 rq->cmd_flags &= ~REQ_FAILED;
1020
1021 drive->dma = 0;
1022
1023 /* sg request */
1024 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1025 struct request_queue *q = drive->queue;
1026 unsigned int alignment;
1027 char *buf;
1028
1029 if (rq->bio)
1030 buf = bio_data(rq->bio);
1031 else
1032 buf = rq->data;
1033
1034 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1035
1036 /*
1037 * check if dma is safe
1038 *
1039 * NOTE! The "len" and "addr" checks should possibly have
1040 * separate masks.
1041 */
1042 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1043 if ((unsigned long)buf & alignment
1044 || rq->data_len & q->dma_pad_mask
1045 || object_is_on_stack(buf))
1046 drive->dma = 0;
1047 }
1048 }
1049
1050 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1051 sector_t block)
1052 {
1053 struct ide_cmd cmd;
1054
1055 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1056 rq->cmd[0], (unsigned long long)block);
1057
1058 if (drive->debug_mask & IDE_DBG_RQ)
1059 blk_dump_rq_flags(rq, "ide_cd_do_request");
1060
1061 if (blk_fs_request(rq)) {
1062 if (cdrom_start_rw(drive, rq) == ide_stopped)
1063 return ide_stopped;
1064
1065 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1066 return ide_stopped;
1067 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1068 rq->cmd_type == REQ_TYPE_ATA_PC) {
1069 if (!rq->timeout)
1070 rq->timeout = ATAPI_WAIT_PC;
1071
1072 cdrom_do_block_pc(drive, rq);
1073 } else if (blk_special_request(rq)) {
1074 /* right now this can only be a reset... */
1075 cdrom_end_request(drive, 1);
1076 return ide_stopped;
1077 } else {
1078 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1079 cdrom_end_request(drive, 0);
1080 return ide_stopped;
1081 }
1082
1083 memset(&cmd, 0, sizeof(cmd));
1084
1085 if (rq_data_dir(rq))
1086 cmd.tf_flags |= IDE_TFLAG_WRITE;
1087
1088 cmd.rq = rq;
1089
1090 return ide_issue_pc(drive, &cmd);
1091 }
1092
1093 /*
1094 * Ioctl handling.
1095 *
1096 * Routines which queue packet commands take as a final argument a pointer to a
1097 * request_sense struct. If execution of the command results in an error with a
1098 * CHECK CONDITION status, this structure will be filled with the results of the
1099 * subsequent request sense command. The pointer can also be NULL, in which case
1100 * no sense information is returned.
1101 */
1102 static void msf_from_bcd(struct atapi_msf *msf)
1103 {
1104 msf->minute = bcd2bin(msf->minute);
1105 msf->second = bcd2bin(msf->second);
1106 msf->frame = bcd2bin(msf->frame);
1107 }
1108
1109 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1110 {
1111 struct cdrom_info *info = drive->driver_data;
1112 struct cdrom_device_info *cdi = &info->devinfo;
1113 unsigned char cmd[BLK_MAX_CDB];
1114
1115 ide_debug_log(IDE_DBG_FUNC, "enter");
1116
1117 memset(cmd, 0, BLK_MAX_CDB);
1118 cmd[0] = GPCMD_TEST_UNIT_READY;
1119
1120 /*
1121 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1122 * instead of supporting the LOAD_UNLOAD opcode.
1123 */
1124 cmd[7] = cdi->sanyo_slot % 3;
1125
1126 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1127 }
1128
1129 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1130 unsigned long *sectors_per_frame,
1131 struct request_sense *sense)
1132 {
1133 struct {
1134 __be32 lba;
1135 __be32 blocklen;
1136 } capbuf;
1137
1138 int stat;
1139 unsigned char cmd[BLK_MAX_CDB];
1140 unsigned len = sizeof(capbuf);
1141 u32 blocklen;
1142
1143 ide_debug_log(IDE_DBG_FUNC, "enter");
1144
1145 memset(cmd, 0, BLK_MAX_CDB);
1146 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1147
1148 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1149 REQ_QUIET);
1150 if (stat)
1151 return stat;
1152
1153 /*
1154 * Sanity check the given block size
1155 */
1156 blocklen = be32_to_cpu(capbuf.blocklen);
1157 switch (blocklen) {
1158 case 512:
1159 case 1024:
1160 case 2048:
1161 case 4096:
1162 break;
1163 default:
1164 printk(KERN_ERR PFX "%s: weird block size %u\n",
1165 drive->name, blocklen);
1166 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1167 drive->name);
1168 blocklen = 2048;
1169 break;
1170 }
1171
1172 *capacity = 1 + be32_to_cpu(capbuf.lba);
1173 *sectors_per_frame = blocklen >> SECTOR_BITS;
1174
1175 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1176 *capacity, *sectors_per_frame);
1177
1178 return 0;
1179 }
1180
1181 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1182 int format, char *buf, int buflen,
1183 struct request_sense *sense)
1184 {
1185 unsigned char cmd[BLK_MAX_CDB];
1186
1187 ide_debug_log(IDE_DBG_FUNC, "enter");
1188
1189 memset(cmd, 0, BLK_MAX_CDB);
1190
1191 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1192 cmd[6] = trackno;
1193 cmd[7] = (buflen >> 8);
1194 cmd[8] = (buflen & 0xff);
1195 cmd[9] = (format << 6);
1196
1197 if (msf_flag)
1198 cmd[1] = 2;
1199
1200 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1201 }
1202
1203 /* Try to read the entire TOC for the disk into our internal buffer. */
1204 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1205 {
1206 int stat, ntracks, i;
1207 struct cdrom_info *info = drive->driver_data;
1208 struct cdrom_device_info *cdi = &info->devinfo;
1209 struct atapi_toc *toc = info->toc;
1210 struct {
1211 struct atapi_toc_header hdr;
1212 struct atapi_toc_entry ent;
1213 } ms_tmp;
1214 long last_written;
1215 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1216
1217 ide_debug_log(IDE_DBG_FUNC, "enter");
1218
1219 if (toc == NULL) {
1220 /* try to allocate space */
1221 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1222 if (toc == NULL) {
1223 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1224 drive->name);
1225 return -ENOMEM;
1226 }
1227 info->toc = toc;
1228 }
1229
1230 /*
1231 * Check to see if the existing data is still valid. If it is,
1232 * just return.
1233 */
1234 (void) cdrom_check_status(drive, sense);
1235
1236 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1237 return 0;
1238
1239 /* try to get the total cdrom capacity and sector size */
1240 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1241 sense);
1242 if (stat)
1243 toc->capacity = 0x1fffff;
1244
1245 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1246 /* save a private copy of the TOC capacity for error handling */
1247 drive->probed_capacity = toc->capacity * sectors_per_frame;
1248
1249 blk_queue_hardsect_size(drive->queue,
1250 sectors_per_frame << SECTOR_BITS);
1251
1252 /* first read just the header, so we know how long the TOC is */
1253 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1254 sizeof(struct atapi_toc_header), sense);
1255 if (stat)
1256 return stat;
1257
1258 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1259 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1260 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1261 }
1262
1263 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1264 if (ntracks <= 0)
1265 return -EIO;
1266 if (ntracks > MAX_TRACKS)
1267 ntracks = MAX_TRACKS;
1268
1269 /* now read the whole schmeer */
1270 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1271 (char *)&toc->hdr,
1272 sizeof(struct atapi_toc_header) +
1273 (ntracks + 1) *
1274 sizeof(struct atapi_toc_entry), sense);
1275
1276 if (stat && toc->hdr.first_track > 1) {
1277 /*
1278 * Cds with CDI tracks only don't have any TOC entries, despite
1279 * of this the returned values are
1280 * first_track == last_track = number of CDI tracks + 1,
1281 * so that this case is indistinguishable from the same layout
1282 * plus an additional audio track. If we get an error for the
1283 * regular case, we assume a CDI without additional audio
1284 * tracks. In this case the readable TOC is empty (CDI tracks
1285 * are not included) and only holds the Leadout entry.
1286 *
1287 * Heiko Eißfeldt.
1288 */
1289 ntracks = 0;
1290 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1291 (char *)&toc->hdr,
1292 sizeof(struct atapi_toc_header) +
1293 (ntracks + 1) *
1294 sizeof(struct atapi_toc_entry),
1295 sense);
1296 if (stat)
1297 return stat;
1298
1299 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1300 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1301 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1302 } else {
1303 toc->hdr.first_track = CDROM_LEADOUT;
1304 toc->hdr.last_track = CDROM_LEADOUT;
1305 }
1306 }
1307
1308 if (stat)
1309 return stat;
1310
1311 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1312
1313 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1314 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1315 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1316 }
1317
1318 for (i = 0; i <= ntracks; i++) {
1319 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1320 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1321 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1322 msf_from_bcd(&toc->ent[i].addr.msf);
1323 }
1324 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1325 toc->ent[i].addr.msf.second,
1326 toc->ent[i].addr.msf.frame);
1327 }
1328
1329 if (toc->hdr.first_track != CDROM_LEADOUT) {
1330 /* read the multisession information */
1331 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1332 sizeof(ms_tmp), sense);
1333 if (stat)
1334 return stat;
1335
1336 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1337 } else {
1338 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1339 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1340 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1341 }
1342
1343 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1344 /* re-read multisession information using MSF format */
1345 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1346 sizeof(ms_tmp), sense);
1347 if (stat)
1348 return stat;
1349
1350 msf_from_bcd(&ms_tmp.ent.addr.msf);
1351 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1352 ms_tmp.ent.addr.msf.second,
1353 ms_tmp.ent.addr.msf.frame);
1354 }
1355
1356 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1357
1358 /* now try to get the total cdrom capacity */
1359 stat = cdrom_get_last_written(cdi, &last_written);
1360 if (!stat && (last_written > toc->capacity)) {
1361 toc->capacity = last_written;
1362 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1363 drive->probed_capacity = toc->capacity * sectors_per_frame;
1364 }
1365
1366 /* Remember that we've read this stuff. */
1367 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1368
1369 return 0;
1370 }
1371
1372 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1373 {
1374 struct cdrom_info *info = drive->driver_data;
1375 struct cdrom_device_info *cdi = &info->devinfo;
1376 struct packet_command cgc;
1377 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1378
1379 ide_debug_log(IDE_DBG_FUNC, "enter");
1380
1381 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1382 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1383
1384 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1385 do {
1386 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1387 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1388 if (!stat)
1389 break;
1390 } while (--attempts);
1391 return stat;
1392 }
1393
1394 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1395 {
1396 struct cdrom_info *cd = drive->driver_data;
1397 u16 curspeed, maxspeed;
1398
1399 ide_debug_log(IDE_DBG_FUNC, "enter");
1400
1401 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1402 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1403 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1404 } else {
1405 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1406 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1407 }
1408
1409 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1410 curspeed, maxspeed);
1411
1412 cd->current_speed = (curspeed + (176/2)) / 176;
1413 cd->max_speed = (maxspeed + (176/2)) / 176;
1414 }
1415
1416 #define IDE_CD_CAPABILITIES \
1417 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1418 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1419 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1420 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1421 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1422
1423 static struct cdrom_device_ops ide_cdrom_dops = {
1424 .open = ide_cdrom_open_real,
1425 .release = ide_cdrom_release_real,
1426 .drive_status = ide_cdrom_drive_status,
1427 .media_changed = ide_cdrom_check_media_change_real,
1428 .tray_move = ide_cdrom_tray_move,
1429 .lock_door = ide_cdrom_lock_door,
1430 .select_speed = ide_cdrom_select_speed,
1431 .get_last_session = ide_cdrom_get_last_session,
1432 .get_mcn = ide_cdrom_get_mcn,
1433 .reset = ide_cdrom_reset,
1434 .audio_ioctl = ide_cdrom_audio_ioctl,
1435 .capability = IDE_CD_CAPABILITIES,
1436 .generic_packet = ide_cdrom_packet,
1437 };
1438
1439 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1440 {
1441 struct cdrom_info *info = drive->driver_data;
1442 struct cdrom_device_info *devinfo = &info->devinfo;
1443
1444 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1445
1446 devinfo->ops = &ide_cdrom_dops;
1447 devinfo->speed = info->current_speed;
1448 devinfo->capacity = nslots;
1449 devinfo->handle = drive;
1450 strcpy(devinfo->name, drive->name);
1451
1452 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1453 devinfo->mask |= CDC_SELECT_SPEED;
1454
1455 devinfo->disk = info->disk;
1456 return register_cdrom(devinfo);
1457 }
1458
1459 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1460 {
1461 struct cdrom_info *cd = drive->driver_data;
1462 struct cdrom_device_info *cdi = &cd->devinfo;
1463 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1464 mechtype_t mechtype;
1465 int nslots = 1;
1466
1467 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1468 drive->media, drive->atapi_flags);
1469
1470 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1471 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1472 CDC_MO_DRIVE | CDC_RAM);
1473
1474 if (drive->media == ide_optical) {
1475 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1476 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1477 drive->name);
1478 return nslots;
1479 }
1480
1481 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1482 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1483 cdi->mask &= ~CDC_PLAY_AUDIO;
1484 return nslots;
1485 }
1486
1487 /*
1488 * We have to cheat a little here. the packet will eventually be queued
1489 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1490 * Since this device hasn't been registered with the Uniform layer yet,
1491 * it can't do this. Same goes for cdi->ops.
1492 */
1493 cdi->handle = drive;
1494 cdi->ops = &ide_cdrom_dops;
1495
1496 if (ide_cdrom_get_capabilities(drive, buf))
1497 return 0;
1498
1499 if ((buf[8 + 6] & 0x01) == 0)
1500 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1501 if (buf[8 + 6] & 0x08)
1502 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1503 if (buf[8 + 3] & 0x01)
1504 cdi->mask &= ~CDC_CD_R;
1505 if (buf[8 + 3] & 0x02)
1506 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1507 if (buf[8 + 2] & 0x38)
1508 cdi->mask &= ~CDC_DVD;
1509 if (buf[8 + 3] & 0x20)
1510 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1511 if (buf[8 + 3] & 0x10)
1512 cdi->mask &= ~CDC_DVD_R;
1513 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1514 cdi->mask &= ~CDC_PLAY_AUDIO;
1515
1516 mechtype = buf[8 + 6] >> 5;
1517 if (mechtype == mechtype_caddy ||
1518 mechtype == mechtype_popup ||
1519 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1520 cdi->mask |= CDC_CLOSE_TRAY;
1521
1522 if (cdi->sanyo_slot > 0) {
1523 cdi->mask &= ~CDC_SELECT_DISC;
1524 nslots = 3;
1525 } else if (mechtype == mechtype_individual_changer ||
1526 mechtype == mechtype_cartridge_changer) {
1527 nslots = cdrom_number_of_slots(cdi);
1528 if (nslots > 1)
1529 cdi->mask &= ~CDC_SELECT_DISC;
1530 }
1531
1532 ide_cdrom_update_speed(drive, buf);
1533
1534 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1535
1536 /* don't print speed if the drive reported 0 */
1537 if (cd->max_speed)
1538 printk(KERN_CONT " %dX", cd->max_speed);
1539
1540 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1541
1542 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1543 printk(KERN_CONT " DVD%s%s",
1544 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1545 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1546
1547 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1548 printk(KERN_CONT " CD%s%s",
1549 (cdi->mask & CDC_CD_R) ? "" : "-R",
1550 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1551
1552 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1553 printk(KERN_CONT " changer w/%d slots", nslots);
1554 else
1555 printk(KERN_CONT " drive");
1556
1557 printk(KERN_CONT ", %dkB Cache\n",
1558 be16_to_cpup((__be16 *)&buf[8 + 12]));
1559
1560 return nslots;
1561 }
1562
1563 /* standard prep_rq_fn that builds 10 byte cmds */
1564 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1565 {
1566 int hard_sect = queue_hardsect_size(q);
1567 long block = (long)rq->hard_sector / (hard_sect >> 9);
1568 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1569
1570 memset(rq->cmd, 0, BLK_MAX_CDB);
1571
1572 if (rq_data_dir(rq) == READ)
1573 rq->cmd[0] = GPCMD_READ_10;
1574 else
1575 rq->cmd[0] = GPCMD_WRITE_10;
1576
1577 /*
1578 * fill in lba
1579 */
1580 rq->cmd[2] = (block >> 24) & 0xff;
1581 rq->cmd[3] = (block >> 16) & 0xff;
1582 rq->cmd[4] = (block >> 8) & 0xff;
1583 rq->cmd[5] = block & 0xff;
1584
1585 /*
1586 * and transfer length
1587 */
1588 rq->cmd[7] = (blocks >> 8) & 0xff;
1589 rq->cmd[8] = blocks & 0xff;
1590 rq->cmd_len = 10;
1591 return BLKPREP_OK;
1592 }
1593
1594 /*
1595 * Most of the SCSI commands are supported directly by ATAPI devices.
1596 * This transform handles the few exceptions.
1597 */
1598 static int ide_cdrom_prep_pc(struct request *rq)
1599 {
1600 u8 *c = rq->cmd;
1601
1602 /* transform 6-byte read/write commands to the 10-byte version */
1603 if (c[0] == READ_6 || c[0] == WRITE_6) {
1604 c[8] = c[4];
1605 c[5] = c[3];
1606 c[4] = c[2];
1607 c[3] = c[1] & 0x1f;
1608 c[2] = 0;
1609 c[1] &= 0xe0;
1610 c[0] += (READ_10 - READ_6);
1611 rq->cmd_len = 10;
1612 return BLKPREP_OK;
1613 }
1614
1615 /*
1616 * it's silly to pretend we understand 6-byte sense commands, just
1617 * reject with ILLEGAL_REQUEST and the caller should take the
1618 * appropriate action
1619 */
1620 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1621 rq->errors = ILLEGAL_REQUEST;
1622 return BLKPREP_KILL;
1623 }
1624
1625 return BLKPREP_OK;
1626 }
1627
1628 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1629 {
1630 if (blk_fs_request(rq))
1631 return ide_cdrom_prep_fs(q, rq);
1632 else if (blk_pc_request(rq))
1633 return ide_cdrom_prep_pc(rq);
1634
1635 return 0;
1636 }
1637
1638 struct cd_list_entry {
1639 const char *id_model;
1640 const char *id_firmware;
1641 unsigned int cd_flags;
1642 };
1643
1644 #ifdef CONFIG_IDE_PROC_FS
1645 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1646 {
1647 unsigned long capacity, sectors_per_frame;
1648
1649 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1650 return 0;
1651
1652 return capacity * sectors_per_frame;
1653 }
1654
1655 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1656 int count, int *eof, void *data)
1657 {
1658 ide_drive_t *drive = data;
1659 int len;
1660
1661 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1662 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1663 }
1664
1665 static ide_proc_entry_t idecd_proc[] = {
1666 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1667 { NULL, 0, NULL, NULL }
1668 };
1669
1670 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1671 {
1672 return idecd_proc;
1673 }
1674
1675 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1676 {
1677 return NULL;
1678 }
1679 #endif
1680
1681 static const struct cd_list_entry ide_cd_quirks_list[] = {
1682 /* Limit transfer size per interrupt. */
1683 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1684 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1685 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1686 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1687 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1688 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1689 IDE_AFLAG_PRE_ATAPI12, },
1690 /* Vertos 300, some versions of this drive like to talk BCD. */
1691 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1692 /* Vertos 600 ESD. */
1693 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1694 /*
1695 * Sanyo 3 CD changer uses a non-standard command for CD changing
1696 * (by default standard ATAPI support for CD changers is used).
1697 */
1698 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1699 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1700 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1701 /* Stingray 8X CD-ROM. */
1702 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1703 /*
1704 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1705 * mode sense page capabilities size, but older drives break.
1706 */
1707 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1708 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1709 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1710 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1711 /*
1712 * Some drives used by Apple don't advertise audio play
1713 * but they do support reading TOC & audio datas.
1714 */
1715 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1716 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1717 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1718 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1719 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1720 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1721 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1722 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1723 { NULL, NULL, 0 }
1724 };
1725
1726 static unsigned int ide_cd_flags(u16 *id)
1727 {
1728 const struct cd_list_entry *cle = ide_cd_quirks_list;
1729
1730 while (cle->id_model) {
1731 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1732 (cle->id_firmware == NULL ||
1733 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1734 return cle->cd_flags;
1735 cle++;
1736 }
1737
1738 return 0;
1739 }
1740
1741 static int ide_cdrom_setup(ide_drive_t *drive)
1742 {
1743 struct cdrom_info *cd = drive->driver_data;
1744 struct cdrom_device_info *cdi = &cd->devinfo;
1745 u16 *id = drive->id;
1746 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1747 int nslots;
1748
1749 ide_debug_log(IDE_DBG_PROBE, "enter");
1750
1751 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1752 blk_queue_dma_alignment(drive->queue, 31);
1753 blk_queue_update_dma_pad(drive->queue, 15);
1754 drive->queue->unplug_delay = (1 * HZ) / 1000;
1755 if (!drive->queue->unplug_delay)
1756 drive->queue->unplug_delay = 1;
1757
1758 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1759 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1760
1761 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1762 fw_rev[4] == '1' && fw_rev[6] <= '2')
1763 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1764 IDE_AFLAG_TOCADDR_AS_BCD);
1765 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1766 fw_rev[4] == '1' && fw_rev[6] <= '2')
1767 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1768 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1769 /* 3 => use CD in slot 0 */
1770 cdi->sanyo_slot = 3;
1771
1772 nslots = ide_cdrom_probe_capabilities(drive);
1773
1774 /* set correct block size */
1775 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1776
1777 if (ide_cdrom_register(drive, nslots)) {
1778 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1779 " cdrom driver.\n", drive->name, __func__);
1780 cd->devinfo.handle = NULL;
1781 return 1;
1782 }
1783
1784 ide_proc_register_driver(drive, cd->driver);
1785 return 0;
1786 }
1787
1788 static void ide_cd_remove(ide_drive_t *drive)
1789 {
1790 struct cdrom_info *info = drive->driver_data;
1791
1792 ide_debug_log(IDE_DBG_FUNC, "enter");
1793
1794 ide_proc_unregister_driver(drive, info->driver);
1795 device_del(&info->dev);
1796 del_gendisk(info->disk);
1797
1798 mutex_lock(&idecd_ref_mutex);
1799 put_device(&info->dev);
1800 mutex_unlock(&idecd_ref_mutex);
1801 }
1802
1803 static void ide_cd_release(struct device *dev)
1804 {
1805 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1806 struct cdrom_device_info *devinfo = &info->devinfo;
1807 ide_drive_t *drive = info->drive;
1808 struct gendisk *g = info->disk;
1809
1810 ide_debug_log(IDE_DBG_FUNC, "enter");
1811
1812 kfree(info->toc);
1813 if (devinfo->handle == drive)
1814 unregister_cdrom(devinfo);
1815 drive->driver_data = NULL;
1816 blk_queue_prep_rq(drive->queue, NULL);
1817 g->private_data = NULL;
1818 put_disk(g);
1819 kfree(info);
1820 }
1821
1822 static int ide_cd_probe(ide_drive_t *);
1823
1824 static struct ide_driver ide_cdrom_driver = {
1825 .gen_driver = {
1826 .owner = THIS_MODULE,
1827 .name = "ide-cdrom",
1828 .bus = &ide_bus_type,
1829 },
1830 .probe = ide_cd_probe,
1831 .remove = ide_cd_remove,
1832 .version = IDECD_VERSION,
1833 .do_request = ide_cd_do_request,
1834 #ifdef CONFIG_IDE_PROC_FS
1835 .proc_entries = ide_cd_proc_entries,
1836 .proc_devsets = ide_cd_proc_devsets,
1837 #endif
1838 };
1839
1840 static int idecd_open(struct block_device *bdev, fmode_t mode)
1841 {
1842 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1843 int rc = -ENOMEM;
1844
1845 if (!info)
1846 return -ENXIO;
1847
1848 rc = cdrom_open(&info->devinfo, bdev, mode);
1849
1850 if (rc < 0)
1851 ide_cd_put(info);
1852
1853 return rc;
1854 }
1855
1856 static int idecd_release(struct gendisk *disk, fmode_t mode)
1857 {
1858 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1859
1860 cdrom_release(&info->devinfo, mode);
1861
1862 ide_cd_put(info);
1863
1864 return 0;
1865 }
1866
1867 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1868 {
1869 struct packet_command cgc;
1870 char buffer[16];
1871 int stat;
1872 char spindown;
1873
1874 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1875 return -EFAULT;
1876
1877 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1878
1879 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1880 if (stat)
1881 return stat;
1882
1883 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1884 return cdrom_mode_select(cdi, &cgc);
1885 }
1886
1887 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1888 {
1889 struct packet_command cgc;
1890 char buffer[16];
1891 int stat;
1892 char spindown;
1893
1894 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1895
1896 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1897 if (stat)
1898 return stat;
1899
1900 spindown = buffer[11] & 0x0f;
1901 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1902 return -EFAULT;
1903 return 0;
1904 }
1905
1906 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1907 unsigned int cmd, unsigned long arg)
1908 {
1909 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1910 int err;
1911
1912 switch (cmd) {
1913 case CDROMSETSPINDOWN:
1914 return idecd_set_spindown(&info->devinfo, arg);
1915 case CDROMGETSPINDOWN:
1916 return idecd_get_spindown(&info->devinfo, arg);
1917 default:
1918 break;
1919 }
1920
1921 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1922 if (err == -EINVAL)
1923 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1924
1925 return err;
1926 }
1927
1928 static int idecd_media_changed(struct gendisk *disk)
1929 {
1930 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1931 return cdrom_media_changed(&info->devinfo);
1932 }
1933
1934 static int idecd_revalidate_disk(struct gendisk *disk)
1935 {
1936 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1937 struct request_sense sense;
1938
1939 ide_cd_read_toc(info->drive, &sense);
1940
1941 return 0;
1942 }
1943
1944 static struct block_device_operations idecd_ops = {
1945 .owner = THIS_MODULE,
1946 .open = idecd_open,
1947 .release = idecd_release,
1948 .locked_ioctl = idecd_ioctl,
1949 .media_changed = idecd_media_changed,
1950 .revalidate_disk = idecd_revalidate_disk
1951 };
1952
1953 /* module options */
1954 static char *ignore;
1955 module_param(ignore, charp, 0400);
1956
1957 static unsigned long debug_mask;
1958 module_param(debug_mask, ulong, 0644);
1959
1960 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1961
1962 static int ide_cd_probe(ide_drive_t *drive)
1963 {
1964 struct cdrom_info *info;
1965 struct gendisk *g;
1966 struct request_sense sense;
1967
1968 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1969 drive->driver_req, drive->media);
1970
1971 if (!strstr("ide-cdrom", drive->driver_req))
1972 goto failed;
1973
1974 if (drive->media != ide_cdrom && drive->media != ide_optical)
1975 goto failed;
1976
1977 /* skip drives that we were told to ignore */
1978 if (ignore != NULL) {
1979 if (strstr(ignore, drive->name)) {
1980 printk(KERN_INFO PFX "ignoring drive %s\n",
1981 drive->name);
1982 goto failed;
1983 }
1984 }
1985
1986 drive->debug_mask = debug_mask;
1987 drive->irq_handler = cdrom_newpc_intr;
1988
1989 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1990 if (info == NULL) {
1991 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1992 drive->name);
1993 goto failed;
1994 }
1995
1996 g = alloc_disk(1 << PARTN_BITS);
1997 if (!g)
1998 goto out_free_cd;
1999
2000 ide_init_disk(g, drive);
2001
2002 info->dev.parent = &drive->gendev;
2003 info->dev.release = ide_cd_release;
2004 dev_set_name(&info->dev, dev_name(&drive->gendev));
2005
2006 if (device_register(&info->dev))
2007 goto out_free_disk;
2008
2009 info->drive = drive;
2010 info->driver = &ide_cdrom_driver;
2011 info->disk = g;
2012
2013 g->private_data = &info->driver;
2014
2015 drive->driver_data = info;
2016
2017 g->minors = 1;
2018 g->driverfs_dev = &drive->gendev;
2019 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2020 if (ide_cdrom_setup(drive)) {
2021 put_device(&info->dev);
2022 goto failed;
2023 }
2024
2025 ide_cd_read_toc(drive, &sense);
2026 g->fops = &idecd_ops;
2027 g->flags |= GENHD_FL_REMOVABLE;
2028 add_disk(g);
2029 return 0;
2030
2031 out_free_disk:
2032 put_disk(g);
2033 out_free_cd:
2034 kfree(info);
2035 failed:
2036 return -ENODEV;
2037 }
2038
2039 static void __exit ide_cdrom_exit(void)
2040 {
2041 driver_unregister(&ide_cdrom_driver.gen_driver);
2042 }
2043
2044 static int __init ide_cdrom_init(void)
2045 {
2046 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2047 return driver_register(&ide_cdrom_driver.gen_driver);
2048 }
2049
2050 MODULE_ALIAS("ide:*m-cdrom*");
2051 MODULE_ALIAS("ide-cd");
2052 module_init(ide_cdrom_init);
2053 module_exit(ide_cdrom_exit);
2054 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree