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ide: sanitize ide_end_rq()
[deliverable/linux.git] / drivers / ide / ide-cd.c
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 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 static DEFINE_MUTEX(idecd_ref_mutex);
57
58 static void ide_cd_release(struct device *);
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 get_device(&cd->dev);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75 }
76
77 static void ide_cd_put(struct cdrom_info *cd)
78 {
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 put_device(&cd->dev);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85 }
86
87 /*
88 * Generic packet command support and error handling routines.
89 */
90
91 /* Mark that we've seen a media change and invalidate our internal buffers. */
92 static void cdrom_saw_media_change(ide_drive_t *drive)
93 {
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96 }
97
98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
99 struct request_sense *sense)
100 {
101 int log = 0;
102
103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
104
105 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
106 return 0;
107
108 switch (sense->sense_key) {
109 case NO_SENSE:
110 case RECOVERED_ERROR:
111 break;
112 case NOT_READY:
113 /*
114 * don't care about tray state messages for e.g. capacity
115 * commands or in-progress or becoming ready
116 */
117 if (sense->asc == 0x3a || sense->asc == 0x04)
118 break;
119 log = 1;
120 break;
121 case ILLEGAL_REQUEST:
122 /*
123 * don't log START_STOP unit with LoEj set, since we cannot
124 * reliably check if drive can auto-close
125 */
126 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
127 break;
128 log = 1;
129 break;
130 case UNIT_ATTENTION:
131 /*
132 * Make good and sure we've seen this potential media change.
133 * Some drives (i.e. Creative) fail to present the correct sense
134 * key in the error register.
135 */
136 cdrom_saw_media_change(drive);
137 break;
138 default:
139 log = 1;
140 break;
141 }
142 return log;
143 }
144
145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
146 struct request *failed_command,
147 struct request_sense *sense)
148 {
149 unsigned long sector;
150 unsigned long bio_sectors;
151 struct cdrom_info *info = drive->driver_data;
152
153 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
154 sense->error_code, sense->sense_key);
155
156 if (failed_command)
157 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
158 failed_command->cmd[0]);
159
160 if (!cdrom_log_sense(drive, failed_command, sense))
161 return;
162
163 /*
164 * If a read toc is executed for a CD-R or CD-RW medium where the first
165 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
166 * confusing error)
167 */
168 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
169 if (sense->sense_key == 0x05 && sense->asc == 0x24)
170 return;
171
172 /* current error */
173 if (sense->error_code == 0x70) {
174 switch (sense->sense_key) {
175 case MEDIUM_ERROR:
176 case VOLUME_OVERFLOW:
177 case ILLEGAL_REQUEST:
178 if (!sense->valid)
179 break;
180 if (failed_command == NULL ||
181 !blk_fs_request(failed_command))
182 break;
183 sector = (sense->information[0] << 24) |
184 (sense->information[1] << 16) |
185 (sense->information[2] << 8) |
186 (sense->information[3]);
187
188 if (drive->queue->hardsect_size == 2048)
189 /* device sector size is 2K */
190 sector <<= 2;
191
192 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
193 sector &= ~(bio_sectors - 1);
194
195 /*
196 * The SCSI specification allows for the value
197 * returned by READ CAPACITY to be up to 75 2K
198 * sectors past the last readable block.
199 * Therefore, if we hit a medium error within the
200 * last 75 2K sectors, we decrease the saved size
201 * value.
202 */
203 if (sector < get_capacity(info->disk) &&
204 drive->probed_capacity - sector < 4 * 75)
205 set_capacity(info->disk, sector);
206 }
207 }
208
209 ide_cd_log_error(drive->name, failed_command, sense);
210 }
211
212 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
213 struct request *failed_command)
214 {
215 struct cdrom_info *info = drive->driver_data;
216 struct request *rq = &drive->request_sense_rq;
217
218 ide_debug_log(IDE_DBG_SENSE, "enter");
219
220 if (sense == NULL)
221 sense = &info->sense_data;
222
223 /* stuff the sense request in front of our current request */
224 blk_rq_init(NULL, rq);
225 rq->cmd_type = REQ_TYPE_ATA_PC;
226 rq->rq_disk = info->disk;
227
228 rq->data = sense;
229 rq->cmd[0] = GPCMD_REQUEST_SENSE;
230 rq->cmd[4] = 18;
231 rq->data_len = 18;
232
233 rq->cmd_type = REQ_TYPE_SENSE;
234 rq->cmd_flags |= REQ_PREEMPT;
235
236 /* NOTE! Save the failed command in "rq->buffer" */
237 rq->buffer = (void *) failed_command;
238
239 if (failed_command)
240 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
241 failed_command->cmd[0]);
242
243 drive->hwif->rq = NULL;
244
245 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
246 }
247
248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
249 {
250 struct request *rq = drive->hwif->rq;
251 int nsectors = rq->hard_cur_sectors;
252
253 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
254 rq->cmd[0], uptodate, nsectors);
255
256 if (blk_sense_request(rq) && uptodate) {
257 /*
258 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
259 * failed request
260 */
261 struct request *failed = (struct request *) rq->buffer;
262 struct cdrom_info *info = drive->driver_data;
263 void *sense = &info->sense_data;
264
265 if (failed) {
266 if (failed->sense) {
267 sense = failed->sense;
268 failed->sense_len = rq->sense_len;
269 }
270 cdrom_analyze_sense_data(drive, failed, sense);
271 /*
272 * now end the failed request
273 */
274 if (blk_fs_request(failed)) {
275 if (ide_end_rq(drive, failed, -EIO,
276 failed->hard_nr_sectors << 9))
277 BUG();
278 } else {
279 if (blk_end_request(failed, -EIO,
280 failed->data_len))
281 BUG();
282 }
283 } else
284 cdrom_analyze_sense_data(drive, NULL, sense);
285 }
286
287 if (!rq->current_nr_sectors && blk_fs_request(rq))
288 uptodate = 1;
289 /* make sure it's fully ended */
290 if (blk_pc_request(rq))
291 nsectors = (rq->data_len + 511) >> 9;
292 if (!nsectors)
293 nsectors = 1;
294
295 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
296 uptodate, nsectors);
297
298 ide_end_request(drive, uptodate, nsectors);
299 }
300
301 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
302 {
303 if (st & 0x80)
304 return;
305 ide_dump_status(drive, msg, st);
306 }
307
308 /*
309 * Returns:
310 * 0: if the request should be continued.
311 * 1: if the request was ended.
312 */
313 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
314 {
315 ide_hwif_t *hwif = drive->hwif;
316 struct request *rq = hwif->rq;
317 int stat, err, sense_key;
318
319 /* check for errors */
320 stat = hwif->tp_ops->read_status(hwif);
321
322 if (stat_ret)
323 *stat_ret = stat;
324
325 if (OK_STAT(stat, good_stat, BAD_R_STAT))
326 return 0;
327
328 /* get the IDE error register */
329 err = ide_read_error(drive);
330 sense_key = err >> 4;
331
332 if (rq == NULL) {
333 printk(KERN_ERR PFX "%s: missing rq in %s\n",
334 drive->name, __func__);
335 return 1;
336 }
337
338 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
339 "rq->cmd_type: 0x%x, err: 0x%x",
340 stat, good_stat, rq->cmd[0], rq->cmd_type,
341 err);
342
343 if (blk_sense_request(rq)) {
344 /*
345 * We got an error trying to get sense info from the drive
346 * (probably while trying to recover from a former error).
347 * Just give up.
348 */
349 rq->cmd_flags |= REQ_FAILED;
350 cdrom_end_request(drive, 0);
351 ide_error(drive, "request sense failure", stat);
352 return 1;
353
354 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
355 /* All other functions, except for READ. */
356
357 /*
358 * if we have an error, pass back CHECK_CONDITION as the
359 * scsi status byte
360 */
361 if (blk_pc_request(rq) && !rq->errors)
362 rq->errors = SAM_STAT_CHECK_CONDITION;
363
364 /* check for tray open */
365 if (sense_key == NOT_READY) {
366 cdrom_saw_media_change(drive);
367 } else if (sense_key == UNIT_ATTENTION) {
368 /* check for media change */
369 cdrom_saw_media_change(drive);
370 return 0;
371 } else if (sense_key == ILLEGAL_REQUEST &&
372 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
373 /*
374 * Don't print error message for this condition--
375 * SFF8090i indicates that 5/24/00 is the correct
376 * response to a request to close the tray if the
377 * drive doesn't have that capability.
378 * cdrom_log_sense() knows this!
379 */
380 } else if (!(rq->cmd_flags & REQ_QUIET)) {
381 /* otherwise, print an error */
382 ide_dump_status(drive, "packet command error", stat);
383 }
384
385 rq->cmd_flags |= REQ_FAILED;
386
387 /*
388 * instead of playing games with moving completions around,
389 * remove failed request completely and end it when the
390 * request sense has completed
391 */
392 goto end_request;
393
394 } else if (blk_fs_request(rq)) {
395 int do_end_request = 0;
396
397 /* handle errors from READ and WRITE requests */
398
399 if (blk_noretry_request(rq))
400 do_end_request = 1;
401
402 if (sense_key == NOT_READY) {
403 /* tray open */
404 if (rq_data_dir(rq) == READ) {
405 cdrom_saw_media_change(drive);
406
407 /* fail the request */
408 printk(KERN_ERR PFX "%s: tray open\n",
409 drive->name);
410 do_end_request = 1;
411 } else {
412 struct cdrom_info *info = drive->driver_data;
413
414 /*
415 * Allow the drive 5 seconds to recover, some
416 * devices will return this error while flushing
417 * data from cache.
418 */
419 if (!rq->errors)
420 info->write_timeout = jiffies +
421 ATAPI_WAIT_WRITE_BUSY;
422 rq->errors = 1;
423 if (time_after(jiffies, info->write_timeout))
424 do_end_request = 1;
425 else {
426 struct request_queue *q = drive->queue;
427 unsigned long flags;
428
429 /*
430 * take a breather relying on the unplug
431 * timer to kick us again
432 */
433 spin_lock_irqsave(q->queue_lock, flags);
434 blk_plug_device(q);
435 spin_unlock_irqrestore(q->queue_lock, flags);
436
437 return 1;
438 }
439 }
440 } else if (sense_key == UNIT_ATTENTION) {
441 /* media change */
442 cdrom_saw_media_change(drive);
443
444 /*
445 * Arrange to retry the request but be sure to give up
446 * if we've retried too many times.
447 */
448 if (++rq->errors > ERROR_MAX)
449 do_end_request = 1;
450 } else if (sense_key == ILLEGAL_REQUEST ||
451 sense_key == DATA_PROTECT) {
452 /*
453 * No point in retrying after an illegal request or data
454 * protect error.
455 */
456 ide_dump_status_no_sense(drive, "command error", stat);
457 do_end_request = 1;
458 } else if (sense_key == MEDIUM_ERROR) {
459 /*
460 * No point in re-trying a zillion times on a bad
461 * sector. If we got here the error is not correctable.
462 */
463 ide_dump_status_no_sense(drive,
464 "media error (bad sector)",
465 stat);
466 do_end_request = 1;
467 } else if (sense_key == BLANK_CHECK) {
468 /* disk appears blank ?? */
469 ide_dump_status_no_sense(drive, "media error (blank)",
470 stat);
471 do_end_request = 1;
472 } else if ((err & ~ATA_ABORTED) != 0) {
473 /* go to the default handler for other errors */
474 ide_error(drive, "cdrom_decode_status", stat);
475 return 1;
476 } else if ((++rq->errors > ERROR_MAX)) {
477 /* we've racked up too many retries, abort */
478 do_end_request = 1;
479 }
480
481 /*
482 * End a request through request sense analysis when we have
483 * sense data. We need this in order to perform end of media
484 * processing.
485 */
486 if (do_end_request)
487 goto end_request;
488
489 /*
490 * If we got a CHECK_CONDITION status, queue
491 * a request sense command.
492 */
493 if (stat & ATA_ERR)
494 cdrom_queue_request_sense(drive, NULL, NULL);
495 } else {
496 blk_dump_rq_flags(rq, PFX "bad rq");
497 cdrom_end_request(drive, 0);
498 }
499
500 /* retry, or handle the next request */
501 return 1;
502
503 end_request:
504 if (stat & ATA_ERR) {
505 struct request_queue *q = drive->queue;
506 unsigned long flags;
507
508 spin_lock_irqsave(q->queue_lock, flags);
509 blkdev_dequeue_request(rq);
510 spin_unlock_irqrestore(q->queue_lock, flags);
511
512 hwif->rq = NULL;
513
514 cdrom_queue_request_sense(drive, rq->sense, rq);
515 } else
516 cdrom_end_request(drive, 0);
517
518 return 1;
519 }
520
521 /*
522 * Check the contents of the interrupt reason register from the cdrom
523 * and attempt to recover if there are problems. Returns 0 if everything's
524 * ok; nonzero if the request has been terminated.
525 */
526 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
527 int len, int ireason, int rw)
528 {
529 ide_hwif_t *hwif = drive->hwif;
530
531 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
532
533 /*
534 * ireason == 0: the drive wants to receive data from us
535 * ireason == 2: the drive is expecting to transfer data to us
536 */
537 if (ireason == (!rw << 1))
538 return 0;
539 else if (ireason == (rw << 1)) {
540
541 /* whoops... */
542 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
543 drive->name, __func__);
544
545 ide_pad_transfer(drive, rw, len);
546 } else if (rw == 0 && ireason == 1) {
547 /*
548 * Some drives (ASUS) seem to tell us that status info is
549 * available. Just get it and ignore.
550 */
551 (void)hwif->tp_ops->read_status(hwif);
552 return 0;
553 } else {
554 /* drive wants a command packet, or invalid ireason... */
555 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
556 drive->name, __func__, ireason);
557 }
558
559 if (rq->cmd_type == REQ_TYPE_ATA_PC)
560 rq->cmd_flags |= REQ_FAILED;
561
562 cdrom_end_request(drive, 0);
563 return -1;
564 }
565
566 /*
567 * Assume that the drive will always provide data in multiples of at least
568 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
569 */
570 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
571 {
572 ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
573
574 if ((len % SECTOR_SIZE) == 0)
575 return 0;
576
577 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
578 __func__, len);
579
580 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
581 printk(KERN_ERR PFX "This drive is not supported by this "
582 "version of the driver\n");
583 else {
584 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
585 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
586 }
587
588 return 1;
589 }
590
591 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
592 struct request *rq)
593 {
594 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
595
596 if (rq_data_dir(rq) == READ) {
597 unsigned short sectors_per_frame =
598 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
599 int nskip = rq->sector & (sectors_per_frame - 1);
600
601 /*
602 * If the requested sector doesn't start on a frame boundary,
603 * we must adjust the start of the transfer so that it does,
604 * and remember to skip the first few sectors.
605 *
606 * If the rq->current_nr_sectors field is larger than the size
607 * of the buffer, it will mean that we're to skip a number of
608 * sectors equal to the amount by which rq->current_nr_sectors
609 * is larger than the buffer size.
610 */
611 if (nskip > 0) {
612 /* sanity check... */
613 if (rq->current_nr_sectors !=
614 bio_cur_sectors(rq->bio)) {
615 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
616 drive->name, __func__,
617 rq->current_nr_sectors);
618 cdrom_end_request(drive, 0);
619 return ide_stopped;
620 }
621 rq->current_nr_sectors += nskip;
622 }
623 }
624
625 /* set up the command */
626 rq->timeout = ATAPI_WAIT_PC;
627
628 return ide_started;
629 }
630
631 /*
632 * Fix up a possibly partially-processed request so that we can start it over
633 * entirely, or even put it back on the request queue.
634 */
635 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
636 {
637
638 ide_debug_log(IDE_DBG_FUNC, "enter");
639
640 if (rq->buffer != bio_data(rq->bio)) {
641 sector_t n =
642 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
643
644 rq->buffer = bio_data(rq->bio);
645 rq->nr_sectors += n;
646 rq->sector -= n;
647 }
648 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
649 rq->hard_cur_sectors = rq->current_nr_sectors;
650 rq->hard_nr_sectors = rq->nr_sectors;
651 rq->hard_sector = rq->sector;
652 rq->q->prep_rq_fn(rq->q, rq);
653 }
654
655 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
656 {
657 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
658
659 /*
660 * Some of the trailing request sense fields are optional,
661 * and some drives don't send them. Sigh.
662 */
663 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
664 rq->data_len > 0 && rq->data_len <= 5)
665 while (rq->data_len > 0) {
666 *(u8 *)rq->data++ = 0;
667 --rq->data_len;
668 }
669 }
670
671 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
672 int write, void *buffer, unsigned *bufflen,
673 struct request_sense *sense, int timeout,
674 unsigned int cmd_flags)
675 {
676 struct cdrom_info *info = drive->driver_data;
677 struct request_sense local_sense;
678 int retries = 10;
679 unsigned int flags = 0;
680
681 if (!sense)
682 sense = &local_sense;
683
684 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
685 "cmd_flags: 0x%x",
686 cmd[0], write, timeout, cmd_flags);
687
688 /* start of retry loop */
689 do {
690 struct request *rq;
691 int error;
692
693 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
694
695 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
696 rq->cmd_type = REQ_TYPE_ATA_PC;
697 rq->sense = sense;
698 rq->cmd_flags |= cmd_flags;
699 rq->timeout = timeout;
700 if (buffer) {
701 rq->data = buffer;
702 rq->data_len = *bufflen;
703 }
704
705 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
706
707 if (buffer)
708 *bufflen = rq->data_len;
709
710 flags = rq->cmd_flags;
711 blk_put_request(rq);
712
713 /*
714 * FIXME: we should probably abort/retry or something in case of
715 * failure.
716 */
717 if (flags & REQ_FAILED) {
718 /*
719 * The request failed. Retry if it was due to a unit
720 * attention status (usually means media was changed).
721 */
722 struct request_sense *reqbuf = sense;
723
724 if (reqbuf->sense_key == UNIT_ATTENTION)
725 cdrom_saw_media_change(drive);
726 else if (reqbuf->sense_key == NOT_READY &&
727 reqbuf->asc == 4 && reqbuf->ascq != 4) {
728 /*
729 * The drive is in the process of loading
730 * a disk. Retry, but wait a little to give
731 * the drive time to complete the load.
732 */
733 ssleep(2);
734 } else {
735 /* otherwise, don't retry */
736 retries = 0;
737 }
738 --retries;
739 }
740
741 /* end of retry loop */
742 } while ((flags & REQ_FAILED) && retries >= 0);
743
744 /* return an error if the command failed */
745 return (flags & REQ_FAILED) ? -EIO : 0;
746 }
747
748 /*
749 * Called from blk_end_request_callback() after the data of the request is
750 * completed and before the request itself is completed. By returning value '1',
751 * blk_end_request_callback() returns immediately without completing it.
752 */
753 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
754 {
755 return 1;
756 }
757
758 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
759 {
760 ide_hwif_t *hwif = drive->hwif;
761 struct request *rq = hwif->rq;
762 xfer_func_t *xferfunc;
763 ide_expiry_t *expiry = NULL;
764 int dma_error = 0, dma, stat, thislen, uptodate = 0;
765 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
766 unsigned int timeout;
767 u16 len;
768 u8 ireason;
769
770 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
771 rq->cmd[0], write);
772
773 /* check for errors */
774 dma = drive->dma;
775 if (dma) {
776 drive->dma = 0;
777 dma_error = hwif->dma_ops->dma_end(drive);
778 if (dma_error) {
779 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
780 write ? "write" : "read");
781 ide_dma_off(drive);
782 }
783 }
784
785 if (cdrom_decode_status(drive, 0, &stat))
786 return ide_stopped;
787
788 /* using dma, transfer is complete now */
789 if (dma) {
790 if (dma_error)
791 return ide_error(drive, "dma error", stat);
792 if (blk_fs_request(rq)) {
793 ide_end_request(drive, 1, rq->nr_sectors);
794 return ide_stopped;
795 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
796 ide_end_request(drive, 1, 1);
797 return ide_stopped;
798 }
799 goto end_request;
800 }
801
802 ide_read_bcount_and_ireason(drive, &len, &ireason);
803
804 thislen = blk_fs_request(rq) ? len : rq->data_len;
805 if (thislen > len)
806 thislen = len;
807
808 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
809 stat, thislen);
810
811 /* If DRQ is clear, the command has completed. */
812 if ((stat & ATA_DRQ) == 0) {
813 if (blk_fs_request(rq)) {
814 /*
815 * If we're not done reading/writing, complain.
816 * Otherwise, complete the command normally.
817 */
818 uptodate = 1;
819 if (rq->current_nr_sectors > 0) {
820 printk(KERN_ERR PFX "%s: %s: data underrun "
821 "(%d blocks)\n",
822 drive->name, __func__,
823 rq->current_nr_sectors);
824 if (!write)
825 rq->cmd_flags |= REQ_FAILED;
826 uptodate = 0;
827 }
828 cdrom_end_request(drive, uptodate);
829 return ide_stopped;
830 } else if (!blk_pc_request(rq)) {
831 ide_cd_request_sense_fixup(drive, rq);
832 /* complain if we still have data left to transfer */
833 uptodate = rq->data_len ? 0 : 1;
834 }
835 goto end_request;
836 }
837
838 /* check which way to transfer data */
839 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
840 return ide_stopped;
841
842 if (blk_fs_request(rq)) {
843 if (write == 0) {
844 int nskip;
845
846 if (ide_cd_check_transfer_size(drive, len)) {
847 cdrom_end_request(drive, 0);
848 return ide_stopped;
849 }
850
851 /*
852 * First, figure out if we need to bit-bucket
853 * any of the leading sectors.
854 */
855 nskip = min_t(int, rq->current_nr_sectors
856 - bio_cur_sectors(rq->bio),
857 thislen >> 9);
858 if (nskip > 0) {
859 ide_pad_transfer(drive, write, nskip << 9);
860 rq->current_nr_sectors -= nskip;
861 thislen -= (nskip << 9);
862 }
863 }
864 }
865
866 if (ireason == 0) {
867 write = 1;
868 xferfunc = hwif->tp_ops->output_data;
869 } else {
870 write = 0;
871 xferfunc = hwif->tp_ops->input_data;
872 }
873
874 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
875 "ireason: 0x%x",
876 rq->cmd_type, ireason);
877
878 /* transfer data */
879 while (thislen > 0) {
880 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
881 int blen = rq->data_len;
882
883 /* bio backed? */
884 if (rq->bio) {
885 if (blk_fs_request(rq)) {
886 ptr = rq->buffer;
887 blen = rq->current_nr_sectors << 9;
888 } else {
889 ptr = bio_data(rq->bio);
890 blen = bio_iovec(rq->bio)->bv_len;
891 }
892 }
893
894 if (!ptr) {
895 if (blk_fs_request(rq) && !write)
896 /*
897 * If the buffers are full, pipe the rest into
898 * oblivion.
899 */
900 ide_pad_transfer(drive, 0, thislen);
901 else {
902 printk(KERN_ERR PFX "%s: confused, missing data\n",
903 drive->name);
904 blk_dump_rq_flags(rq, rq_data_dir(rq)
905 ? "cdrom_newpc_intr, write"
906 : "cdrom_newpc_intr, read");
907 }
908 break;
909 }
910
911 if (blen > thislen)
912 blen = thislen;
913
914 xferfunc(drive, NULL, ptr, blen);
915
916 thislen -= blen;
917 len -= blen;
918
919 if (blk_fs_request(rq)) {
920 rq->buffer += blen;
921 rq->nr_sectors -= (blen >> 9);
922 rq->current_nr_sectors -= (blen >> 9);
923 rq->sector += (blen >> 9);
924
925 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
926 cdrom_end_request(drive, 1);
927 } else {
928 rq->data_len -= blen;
929
930 /*
931 * The request can't be completed until DRQ is cleared.
932 * So complete the data, but don't complete the request
933 * using the dummy function for the callback feature
934 * of blk_end_request_callback().
935 */
936 if (rq->bio)
937 blk_end_request_callback(rq, 0, blen,
938 cdrom_newpc_intr_dummy_cb);
939 else
940 rq->data += blen;
941 }
942 if (!write && blk_sense_request(rq))
943 rq->sense_len += blen;
944 }
945
946 /* pad, if necessary */
947 if (!blk_fs_request(rq) && len > 0)
948 ide_pad_transfer(drive, write, len);
949
950 if (blk_pc_request(rq)) {
951 timeout = rq->timeout;
952 } else {
953 timeout = ATAPI_WAIT_PC;
954 if (!blk_fs_request(rq))
955 expiry = ide_cd_expiry;
956 }
957
958 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
959 return ide_started;
960
961 end_request:
962 if (blk_pc_request(rq)) {
963 unsigned int dlen = rq->data_len;
964
965 if (dma)
966 rq->data_len = 0;
967
968 if (blk_end_request(rq, 0, dlen))
969 BUG();
970
971 hwif->rq = NULL;
972 } else {
973 if (!uptodate)
974 rq->cmd_flags |= REQ_FAILED;
975 cdrom_end_request(drive, uptodate);
976 }
977 return ide_stopped;
978 }
979
980 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
981 {
982 struct cdrom_info *cd = drive->driver_data;
983 int write = rq_data_dir(rq) == WRITE;
984 unsigned short sectors_per_frame =
985 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
986
987 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
988 "secs_per_frame: %u",
989 rq->cmd[0], write, sectors_per_frame);
990
991 if (write) {
992 /* disk has become write protected */
993 if (get_disk_ro(cd->disk)) {
994 cdrom_end_request(drive, 0);
995 return ide_stopped;
996 }
997 } else {
998 /*
999 * We may be retrying this request after an error. Fix up any
1000 * weirdness which might be present in the request packet.
1001 */
1002 ide_cd_restore_request(drive, rq);
1003 }
1004
1005 /* use DMA, if possible / writes *must* be hardware frame aligned */
1006 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1007 (rq->sector & (sectors_per_frame - 1))) {
1008 if (write) {
1009 cdrom_end_request(drive, 0);
1010 return ide_stopped;
1011 }
1012 drive->dma = 0;
1013 } else
1014 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1015
1016 if (write)
1017 cd->devinfo.media_written = 1;
1018
1019 return ide_started;
1020 }
1021
1022 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1023 {
1024
1025 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1026 rq->cmd[0], rq->cmd_type);
1027
1028 if (blk_pc_request(rq))
1029 rq->cmd_flags |= REQ_QUIET;
1030 else
1031 rq->cmd_flags &= ~REQ_FAILED;
1032
1033 drive->dma = 0;
1034
1035 /* sg request */
1036 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1037 struct request_queue *q = drive->queue;
1038 unsigned int alignment;
1039 char *buf;
1040
1041 if (rq->bio)
1042 buf = bio_data(rq->bio);
1043 else
1044 buf = rq->data;
1045
1046 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1047
1048 /*
1049 * check if dma is safe
1050 *
1051 * NOTE! The "len" and "addr" checks should possibly have
1052 * separate masks.
1053 */
1054 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1055 if ((unsigned long)buf & alignment
1056 || rq->data_len & q->dma_pad_mask
1057 || object_is_on_stack(buf))
1058 drive->dma = 0;
1059 }
1060 }
1061
1062 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1063 sector_t block)
1064 {
1065 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1066 rq->cmd[0], (unsigned long long)block);
1067
1068 if (drive->debug_mask & IDE_DBG_RQ)
1069 blk_dump_rq_flags(rq, "ide_cd_do_request");
1070
1071 if (blk_fs_request(rq)) {
1072 if (cdrom_start_rw(drive, rq) == ide_stopped)
1073 return ide_stopped;
1074
1075 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1076 return ide_stopped;
1077 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1078 rq->cmd_type == REQ_TYPE_ATA_PC) {
1079 if (!rq->timeout)
1080 rq->timeout = ATAPI_WAIT_PC;
1081
1082 cdrom_do_block_pc(drive, rq);
1083 } else if (blk_special_request(rq)) {
1084 /* right now this can only be a reset... */
1085 cdrom_end_request(drive, 1);
1086 return ide_stopped;
1087 } else {
1088 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1089 cdrom_end_request(drive, 0);
1090 return ide_stopped;
1091 }
1092
1093 return ide_issue_pc(drive);
1094 }
1095
1096 /*
1097 * Ioctl handling.
1098 *
1099 * Routines which queue packet commands take as a final argument a pointer to a
1100 * request_sense struct. If execution of the command results in an error with a
1101 * CHECK CONDITION status, this structure will be filled with the results of the
1102 * subsequent request sense command. The pointer can also be NULL, in which case
1103 * no sense information is returned.
1104 */
1105 static void msf_from_bcd(struct atapi_msf *msf)
1106 {
1107 msf->minute = bcd2bin(msf->minute);
1108 msf->second = bcd2bin(msf->second);
1109 msf->frame = bcd2bin(msf->frame);
1110 }
1111
1112 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1113 {
1114 struct cdrom_info *info = drive->driver_data;
1115 struct cdrom_device_info *cdi = &info->devinfo;
1116 unsigned char cmd[BLK_MAX_CDB];
1117
1118 ide_debug_log(IDE_DBG_FUNC, "enter");
1119
1120 memset(cmd, 0, BLK_MAX_CDB);
1121 cmd[0] = GPCMD_TEST_UNIT_READY;
1122
1123 /*
1124 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1125 * instead of supporting the LOAD_UNLOAD opcode.
1126 */
1127 cmd[7] = cdi->sanyo_slot % 3;
1128
1129 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1130 }
1131
1132 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1133 unsigned long *sectors_per_frame,
1134 struct request_sense *sense)
1135 {
1136 struct {
1137 __be32 lba;
1138 __be32 blocklen;
1139 } capbuf;
1140
1141 int stat;
1142 unsigned char cmd[BLK_MAX_CDB];
1143 unsigned len = sizeof(capbuf);
1144 u32 blocklen;
1145
1146 ide_debug_log(IDE_DBG_FUNC, "enter");
1147
1148 memset(cmd, 0, BLK_MAX_CDB);
1149 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1150
1151 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1152 REQ_QUIET);
1153 if (stat)
1154 return stat;
1155
1156 /*
1157 * Sanity check the given block size
1158 */
1159 blocklen = be32_to_cpu(capbuf.blocklen);
1160 switch (blocklen) {
1161 case 512:
1162 case 1024:
1163 case 2048:
1164 case 4096:
1165 break;
1166 default:
1167 printk(KERN_ERR PFX "%s: weird block size %u\n",
1168 drive->name, blocklen);
1169 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1170 drive->name);
1171 blocklen = 2048;
1172 break;
1173 }
1174
1175 *capacity = 1 + be32_to_cpu(capbuf.lba);
1176 *sectors_per_frame = blocklen >> SECTOR_BITS;
1177
1178 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1179 *capacity, *sectors_per_frame);
1180
1181 return 0;
1182 }
1183
1184 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1185 int format, char *buf, int buflen,
1186 struct request_sense *sense)
1187 {
1188 unsigned char cmd[BLK_MAX_CDB];
1189
1190 ide_debug_log(IDE_DBG_FUNC, "enter");
1191
1192 memset(cmd, 0, BLK_MAX_CDB);
1193
1194 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1195 cmd[6] = trackno;
1196 cmd[7] = (buflen >> 8);
1197 cmd[8] = (buflen & 0xff);
1198 cmd[9] = (format << 6);
1199
1200 if (msf_flag)
1201 cmd[1] = 2;
1202
1203 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1204 }
1205
1206 /* Try to read the entire TOC for the disk into our internal buffer. */
1207 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1208 {
1209 int stat, ntracks, i;
1210 struct cdrom_info *info = drive->driver_data;
1211 struct cdrom_device_info *cdi = &info->devinfo;
1212 struct atapi_toc *toc = info->toc;
1213 struct {
1214 struct atapi_toc_header hdr;
1215 struct atapi_toc_entry ent;
1216 } ms_tmp;
1217 long last_written;
1218 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1219
1220 ide_debug_log(IDE_DBG_FUNC, "enter");
1221
1222 if (toc == NULL) {
1223 /* try to allocate space */
1224 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1225 if (toc == NULL) {
1226 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1227 drive->name);
1228 return -ENOMEM;
1229 }
1230 info->toc = toc;
1231 }
1232
1233 /*
1234 * Check to see if the existing data is still valid. If it is,
1235 * just return.
1236 */
1237 (void) cdrom_check_status(drive, sense);
1238
1239 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1240 return 0;
1241
1242 /* try to get the total cdrom capacity and sector size */
1243 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1244 sense);
1245 if (stat)
1246 toc->capacity = 0x1fffff;
1247
1248 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1249 /* save a private copy of the TOC capacity for error handling */
1250 drive->probed_capacity = toc->capacity * sectors_per_frame;
1251
1252 blk_queue_hardsect_size(drive->queue,
1253 sectors_per_frame << SECTOR_BITS);
1254
1255 /* first read just the header, so we know how long the TOC is */
1256 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1257 sizeof(struct atapi_toc_header), sense);
1258 if (stat)
1259 return stat;
1260
1261 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1262 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1263 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1264 }
1265
1266 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1267 if (ntracks <= 0)
1268 return -EIO;
1269 if (ntracks > MAX_TRACKS)
1270 ntracks = MAX_TRACKS;
1271
1272 /* now read the whole schmeer */
1273 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1274 (char *)&toc->hdr,
1275 sizeof(struct atapi_toc_header) +
1276 (ntracks + 1) *
1277 sizeof(struct atapi_toc_entry), sense);
1278
1279 if (stat && toc->hdr.first_track > 1) {
1280 /*
1281 * Cds with CDI tracks only don't have any TOC entries, despite
1282 * of this the returned values are
1283 * first_track == last_track = number of CDI tracks + 1,
1284 * so that this case is indistinguishable from the same layout
1285 * plus an additional audio track. If we get an error for the
1286 * regular case, we assume a CDI without additional audio
1287 * tracks. In this case the readable TOC is empty (CDI tracks
1288 * are not included) and only holds the Leadout entry.
1289 *
1290 * Heiko Eißfeldt.
1291 */
1292 ntracks = 0;
1293 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1294 (char *)&toc->hdr,
1295 sizeof(struct atapi_toc_header) +
1296 (ntracks + 1) *
1297 sizeof(struct atapi_toc_entry),
1298 sense);
1299 if (stat)
1300 return stat;
1301
1302 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1303 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1304 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1305 } else {
1306 toc->hdr.first_track = CDROM_LEADOUT;
1307 toc->hdr.last_track = CDROM_LEADOUT;
1308 }
1309 }
1310
1311 if (stat)
1312 return stat;
1313
1314 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1315
1316 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1317 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1318 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1319 }
1320
1321 for (i = 0; i <= ntracks; i++) {
1322 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1323 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1324 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1325 msf_from_bcd(&toc->ent[i].addr.msf);
1326 }
1327 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1328 toc->ent[i].addr.msf.second,
1329 toc->ent[i].addr.msf.frame);
1330 }
1331
1332 if (toc->hdr.first_track != CDROM_LEADOUT) {
1333 /* read the multisession information */
1334 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1335 sizeof(ms_tmp), sense);
1336 if (stat)
1337 return stat;
1338
1339 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1340 } else {
1341 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1342 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1343 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1344 }
1345
1346 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1347 /* re-read multisession information using MSF format */
1348 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1349 sizeof(ms_tmp), sense);
1350 if (stat)
1351 return stat;
1352
1353 msf_from_bcd(&ms_tmp.ent.addr.msf);
1354 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1355 ms_tmp.ent.addr.msf.second,
1356 ms_tmp.ent.addr.msf.frame);
1357 }
1358
1359 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1360
1361 /* now try to get the total cdrom capacity */
1362 stat = cdrom_get_last_written(cdi, &last_written);
1363 if (!stat && (last_written > toc->capacity)) {
1364 toc->capacity = last_written;
1365 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1366 drive->probed_capacity = toc->capacity * sectors_per_frame;
1367 }
1368
1369 /* Remember that we've read this stuff. */
1370 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1371
1372 return 0;
1373 }
1374
1375 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1376 {
1377 struct cdrom_info *info = drive->driver_data;
1378 struct cdrom_device_info *cdi = &info->devinfo;
1379 struct packet_command cgc;
1380 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1381
1382 ide_debug_log(IDE_DBG_FUNC, "enter");
1383
1384 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1385 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1386
1387 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1388 do {
1389 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1390 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1391 if (!stat)
1392 break;
1393 } while (--attempts);
1394 return stat;
1395 }
1396
1397 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1398 {
1399 struct cdrom_info *cd = drive->driver_data;
1400 u16 curspeed, maxspeed;
1401
1402 ide_debug_log(IDE_DBG_FUNC, "enter");
1403
1404 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1405 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1406 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1407 } else {
1408 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1409 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1410 }
1411
1412 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1413 curspeed, maxspeed);
1414
1415 cd->current_speed = (curspeed + (176/2)) / 176;
1416 cd->max_speed = (maxspeed + (176/2)) / 176;
1417 }
1418
1419 #define IDE_CD_CAPABILITIES \
1420 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1421 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1422 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1423 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1424 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1425
1426 static struct cdrom_device_ops ide_cdrom_dops = {
1427 .open = ide_cdrom_open_real,
1428 .release = ide_cdrom_release_real,
1429 .drive_status = ide_cdrom_drive_status,
1430 .media_changed = ide_cdrom_check_media_change_real,
1431 .tray_move = ide_cdrom_tray_move,
1432 .lock_door = ide_cdrom_lock_door,
1433 .select_speed = ide_cdrom_select_speed,
1434 .get_last_session = ide_cdrom_get_last_session,
1435 .get_mcn = ide_cdrom_get_mcn,
1436 .reset = ide_cdrom_reset,
1437 .audio_ioctl = ide_cdrom_audio_ioctl,
1438 .capability = IDE_CD_CAPABILITIES,
1439 .generic_packet = ide_cdrom_packet,
1440 };
1441
1442 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1443 {
1444 struct cdrom_info *info = drive->driver_data;
1445 struct cdrom_device_info *devinfo = &info->devinfo;
1446
1447 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1448
1449 devinfo->ops = &ide_cdrom_dops;
1450 devinfo->speed = info->current_speed;
1451 devinfo->capacity = nslots;
1452 devinfo->handle = drive;
1453 strcpy(devinfo->name, drive->name);
1454
1455 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1456 devinfo->mask |= CDC_SELECT_SPEED;
1457
1458 devinfo->disk = info->disk;
1459 return register_cdrom(devinfo);
1460 }
1461
1462 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1463 {
1464 struct cdrom_info *cd = drive->driver_data;
1465 struct cdrom_device_info *cdi = &cd->devinfo;
1466 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1467 mechtype_t mechtype;
1468 int nslots = 1;
1469
1470 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1471 drive->media, drive->atapi_flags);
1472
1473 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1474 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1475 CDC_MO_DRIVE | CDC_RAM);
1476
1477 if (drive->media == ide_optical) {
1478 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1479 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1480 drive->name);
1481 return nslots;
1482 }
1483
1484 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1485 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1486 cdi->mask &= ~CDC_PLAY_AUDIO;
1487 return nslots;
1488 }
1489
1490 /*
1491 * We have to cheat a little here. the packet will eventually be queued
1492 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1493 * Since this device hasn't been registered with the Uniform layer yet,
1494 * it can't do this. Same goes for cdi->ops.
1495 */
1496 cdi->handle = drive;
1497 cdi->ops = &ide_cdrom_dops;
1498
1499 if (ide_cdrom_get_capabilities(drive, buf))
1500 return 0;
1501
1502 if ((buf[8 + 6] & 0x01) == 0)
1503 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1504 if (buf[8 + 6] & 0x08)
1505 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1506 if (buf[8 + 3] & 0x01)
1507 cdi->mask &= ~CDC_CD_R;
1508 if (buf[8 + 3] & 0x02)
1509 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1510 if (buf[8 + 2] & 0x38)
1511 cdi->mask &= ~CDC_DVD;
1512 if (buf[8 + 3] & 0x20)
1513 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1514 if (buf[8 + 3] & 0x10)
1515 cdi->mask &= ~CDC_DVD_R;
1516 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1517 cdi->mask &= ~CDC_PLAY_AUDIO;
1518
1519 mechtype = buf[8 + 6] >> 5;
1520 if (mechtype == mechtype_caddy ||
1521 mechtype == mechtype_popup ||
1522 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1523 cdi->mask |= CDC_CLOSE_TRAY;
1524
1525 if (cdi->sanyo_slot > 0) {
1526 cdi->mask &= ~CDC_SELECT_DISC;
1527 nslots = 3;
1528 } else if (mechtype == mechtype_individual_changer ||
1529 mechtype == mechtype_cartridge_changer) {
1530 nslots = cdrom_number_of_slots(cdi);
1531 if (nslots > 1)
1532 cdi->mask &= ~CDC_SELECT_DISC;
1533 }
1534
1535 ide_cdrom_update_speed(drive, buf);
1536
1537 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1538
1539 /* don't print speed if the drive reported 0 */
1540 if (cd->max_speed)
1541 printk(KERN_CONT " %dX", cd->max_speed);
1542
1543 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1544
1545 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1546 printk(KERN_CONT " DVD%s%s",
1547 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1548 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1549
1550 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1551 printk(KERN_CONT " CD%s%s",
1552 (cdi->mask & CDC_CD_R) ? "" : "-R",
1553 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1554
1555 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1556 printk(KERN_CONT " changer w/%d slots", nslots);
1557 else
1558 printk(KERN_CONT " drive");
1559
1560 printk(KERN_CONT ", %dkB Cache\n",
1561 be16_to_cpup((__be16 *)&buf[8 + 12]));
1562
1563 return nslots;
1564 }
1565
1566 /* standard prep_rq_fn that builds 10 byte cmds */
1567 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1568 {
1569 int hard_sect = queue_hardsect_size(q);
1570 long block = (long)rq->hard_sector / (hard_sect >> 9);
1571 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1572
1573 memset(rq->cmd, 0, BLK_MAX_CDB);
1574
1575 if (rq_data_dir(rq) == READ)
1576 rq->cmd[0] = GPCMD_READ_10;
1577 else
1578 rq->cmd[0] = GPCMD_WRITE_10;
1579
1580 /*
1581 * fill in lba
1582 */
1583 rq->cmd[2] = (block >> 24) & 0xff;
1584 rq->cmd[3] = (block >> 16) & 0xff;
1585 rq->cmd[4] = (block >> 8) & 0xff;
1586 rq->cmd[5] = block & 0xff;
1587
1588 /*
1589 * and transfer length
1590 */
1591 rq->cmd[7] = (blocks >> 8) & 0xff;
1592 rq->cmd[8] = blocks & 0xff;
1593 rq->cmd_len = 10;
1594 return BLKPREP_OK;
1595 }
1596
1597 /*
1598 * Most of the SCSI commands are supported directly by ATAPI devices.
1599 * This transform handles the few exceptions.
1600 */
1601 static int ide_cdrom_prep_pc(struct request *rq)
1602 {
1603 u8 *c = rq->cmd;
1604
1605 /* transform 6-byte read/write commands to the 10-byte version */
1606 if (c[0] == READ_6 || c[0] == WRITE_6) {
1607 c[8] = c[4];
1608 c[5] = c[3];
1609 c[4] = c[2];
1610 c[3] = c[1] & 0x1f;
1611 c[2] = 0;
1612 c[1] &= 0xe0;
1613 c[0] += (READ_10 - READ_6);
1614 rq->cmd_len = 10;
1615 return BLKPREP_OK;
1616 }
1617
1618 /*
1619 * it's silly to pretend we understand 6-byte sense commands, just
1620 * reject with ILLEGAL_REQUEST and the caller should take the
1621 * appropriate action
1622 */
1623 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1624 rq->errors = ILLEGAL_REQUEST;
1625 return BLKPREP_KILL;
1626 }
1627
1628 return BLKPREP_OK;
1629 }
1630
1631 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1632 {
1633 if (blk_fs_request(rq))
1634 return ide_cdrom_prep_fs(q, rq);
1635 else if (blk_pc_request(rq))
1636 return ide_cdrom_prep_pc(rq);
1637
1638 return 0;
1639 }
1640
1641 struct cd_list_entry {
1642 const char *id_model;
1643 const char *id_firmware;
1644 unsigned int cd_flags;
1645 };
1646
1647 #ifdef CONFIG_IDE_PROC_FS
1648 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1649 {
1650 unsigned long capacity, sectors_per_frame;
1651
1652 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1653 return 0;
1654
1655 return capacity * sectors_per_frame;
1656 }
1657
1658 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1659 int count, int *eof, void *data)
1660 {
1661 ide_drive_t *drive = data;
1662 int len;
1663
1664 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1665 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1666 }
1667
1668 static ide_proc_entry_t idecd_proc[] = {
1669 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1670 { NULL, 0, NULL, NULL }
1671 };
1672
1673 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1674 {
1675 return idecd_proc;
1676 }
1677
1678 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1679 {
1680 return NULL;
1681 }
1682 #endif
1683
1684 static const struct cd_list_entry ide_cd_quirks_list[] = {
1685 /* Limit transfer size per interrupt. */
1686 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1687 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1688 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1689 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1690 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1691 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1692 IDE_AFLAG_PRE_ATAPI12, },
1693 /* Vertos 300, some versions of this drive like to talk BCD. */
1694 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1695 /* Vertos 600 ESD. */
1696 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1697 /*
1698 * Sanyo 3 CD changer uses a non-standard command for CD changing
1699 * (by default standard ATAPI support for CD changers is used).
1700 */
1701 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1702 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1703 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1704 /* Stingray 8X CD-ROM. */
1705 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1706 /*
1707 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1708 * mode sense page capabilities size, but older drives break.
1709 */
1710 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1711 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1712 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1713 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1714 /*
1715 * Some drives used by Apple don't advertise audio play
1716 * but they do support reading TOC & audio datas.
1717 */
1718 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1719 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1720 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1721 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1722 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1723 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1724 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1725 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1726 { NULL, NULL, 0 }
1727 };
1728
1729 static unsigned int ide_cd_flags(u16 *id)
1730 {
1731 const struct cd_list_entry *cle = ide_cd_quirks_list;
1732
1733 while (cle->id_model) {
1734 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1735 (cle->id_firmware == NULL ||
1736 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1737 return cle->cd_flags;
1738 cle++;
1739 }
1740
1741 return 0;
1742 }
1743
1744 static int ide_cdrom_setup(ide_drive_t *drive)
1745 {
1746 struct cdrom_info *cd = drive->driver_data;
1747 struct cdrom_device_info *cdi = &cd->devinfo;
1748 u16 *id = drive->id;
1749 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1750 int nslots;
1751
1752 ide_debug_log(IDE_DBG_PROBE, "enter");
1753
1754 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1755 blk_queue_dma_alignment(drive->queue, 31);
1756 blk_queue_update_dma_pad(drive->queue, 15);
1757 drive->queue->unplug_delay = (1 * HZ) / 1000;
1758 if (!drive->queue->unplug_delay)
1759 drive->queue->unplug_delay = 1;
1760
1761 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1762 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1763
1764 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1765 fw_rev[4] == '1' && fw_rev[6] <= '2')
1766 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1767 IDE_AFLAG_TOCADDR_AS_BCD);
1768 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1769 fw_rev[4] == '1' && fw_rev[6] <= '2')
1770 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1771 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1772 /* 3 => use CD in slot 0 */
1773 cdi->sanyo_slot = 3;
1774
1775 nslots = ide_cdrom_probe_capabilities(drive);
1776
1777 /* set correct block size */
1778 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1779
1780 if (ide_cdrom_register(drive, nslots)) {
1781 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1782 " cdrom driver.\n", drive->name, __func__);
1783 cd->devinfo.handle = NULL;
1784 return 1;
1785 }
1786
1787 ide_proc_register_driver(drive, cd->driver);
1788 return 0;
1789 }
1790
1791 static void ide_cd_remove(ide_drive_t *drive)
1792 {
1793 struct cdrom_info *info = drive->driver_data;
1794
1795 ide_debug_log(IDE_DBG_FUNC, "enter");
1796
1797 ide_proc_unregister_driver(drive, info->driver);
1798 device_del(&info->dev);
1799 del_gendisk(info->disk);
1800
1801 mutex_lock(&idecd_ref_mutex);
1802 put_device(&info->dev);
1803 mutex_unlock(&idecd_ref_mutex);
1804 }
1805
1806 static void ide_cd_release(struct device *dev)
1807 {
1808 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1809 struct cdrom_device_info *devinfo = &info->devinfo;
1810 ide_drive_t *drive = info->drive;
1811 struct gendisk *g = info->disk;
1812
1813 ide_debug_log(IDE_DBG_FUNC, "enter");
1814
1815 kfree(info->toc);
1816 if (devinfo->handle == drive)
1817 unregister_cdrom(devinfo);
1818 drive->driver_data = NULL;
1819 blk_queue_prep_rq(drive->queue, NULL);
1820 g->private_data = NULL;
1821 put_disk(g);
1822 kfree(info);
1823 }
1824
1825 static int ide_cd_probe(ide_drive_t *);
1826
1827 static struct ide_driver ide_cdrom_driver = {
1828 .gen_driver = {
1829 .owner = THIS_MODULE,
1830 .name = "ide-cdrom",
1831 .bus = &ide_bus_type,
1832 },
1833 .probe = ide_cd_probe,
1834 .remove = ide_cd_remove,
1835 .version = IDECD_VERSION,
1836 .do_request = ide_cd_do_request,
1837 #ifdef CONFIG_IDE_PROC_FS
1838 .proc_entries = ide_cd_proc_entries,
1839 .proc_devsets = ide_cd_proc_devsets,
1840 #endif
1841 };
1842
1843 static int idecd_open(struct block_device *bdev, fmode_t mode)
1844 {
1845 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1846 int rc = -ENOMEM;
1847
1848 if (!info)
1849 return -ENXIO;
1850
1851 rc = cdrom_open(&info->devinfo, bdev, mode);
1852
1853 if (rc < 0)
1854 ide_cd_put(info);
1855
1856 return rc;
1857 }
1858
1859 static int idecd_release(struct gendisk *disk, fmode_t mode)
1860 {
1861 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1862
1863 cdrom_release(&info->devinfo, mode);
1864
1865 ide_cd_put(info);
1866
1867 return 0;
1868 }
1869
1870 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1871 {
1872 struct packet_command cgc;
1873 char buffer[16];
1874 int stat;
1875 char spindown;
1876
1877 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1878 return -EFAULT;
1879
1880 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1881
1882 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1883 if (stat)
1884 return stat;
1885
1886 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1887 return cdrom_mode_select(cdi, &cgc);
1888 }
1889
1890 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1891 {
1892 struct packet_command cgc;
1893 char buffer[16];
1894 int stat;
1895 char spindown;
1896
1897 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1898
1899 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1900 if (stat)
1901 return stat;
1902
1903 spindown = buffer[11] & 0x0f;
1904 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1905 return -EFAULT;
1906 return 0;
1907 }
1908
1909 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1910 unsigned int cmd, unsigned long arg)
1911 {
1912 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1913 int err;
1914
1915 switch (cmd) {
1916 case CDROMSETSPINDOWN:
1917 return idecd_set_spindown(&info->devinfo, arg);
1918 case CDROMGETSPINDOWN:
1919 return idecd_get_spindown(&info->devinfo, arg);
1920 default:
1921 break;
1922 }
1923
1924 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1925 if (err == -EINVAL)
1926 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1927
1928 return err;
1929 }
1930
1931 static int idecd_media_changed(struct gendisk *disk)
1932 {
1933 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1934 return cdrom_media_changed(&info->devinfo);
1935 }
1936
1937 static int idecd_revalidate_disk(struct gendisk *disk)
1938 {
1939 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1940 struct request_sense sense;
1941
1942 ide_cd_read_toc(info->drive, &sense);
1943
1944 return 0;
1945 }
1946
1947 static struct block_device_operations idecd_ops = {
1948 .owner = THIS_MODULE,
1949 .open = idecd_open,
1950 .release = idecd_release,
1951 .locked_ioctl = idecd_ioctl,
1952 .media_changed = idecd_media_changed,
1953 .revalidate_disk = idecd_revalidate_disk
1954 };
1955
1956 /* module options */
1957 static char *ignore;
1958 module_param(ignore, charp, 0400);
1959
1960 static unsigned long debug_mask;
1961 module_param(debug_mask, ulong, 0644);
1962
1963 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1964
1965 static int ide_cd_probe(ide_drive_t *drive)
1966 {
1967 struct cdrom_info *info;
1968 struct gendisk *g;
1969 struct request_sense sense;
1970
1971 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1972 drive->driver_req, drive->media);
1973
1974 if (!strstr("ide-cdrom", drive->driver_req))
1975 goto failed;
1976
1977 if (drive->media != ide_cdrom && drive->media != ide_optical)
1978 goto failed;
1979
1980 /* skip drives that we were told to ignore */
1981 if (ignore != NULL) {
1982 if (strstr(ignore, drive->name)) {
1983 printk(KERN_INFO PFX "ignoring drive %s\n",
1984 drive->name);
1985 goto failed;
1986 }
1987 }
1988
1989 drive->debug_mask = debug_mask;
1990 drive->irq_handler = cdrom_newpc_intr;
1991
1992 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1993 if (info == NULL) {
1994 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1995 drive->name);
1996 goto failed;
1997 }
1998
1999 g = alloc_disk(1 << PARTN_BITS);
2000 if (!g)
2001 goto out_free_cd;
2002
2003 ide_init_disk(g, drive);
2004
2005 info->dev.parent = &drive->gendev;
2006 info->dev.release = ide_cd_release;
2007 dev_set_name(&info->dev, dev_name(&drive->gendev));
2008
2009 if (device_register(&info->dev))
2010 goto out_free_disk;
2011
2012 info->drive = drive;
2013 info->driver = &ide_cdrom_driver;
2014 info->disk = g;
2015
2016 g->private_data = &info->driver;
2017
2018 drive->driver_data = info;
2019
2020 g->minors = 1;
2021 g->driverfs_dev = &drive->gendev;
2022 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2023 if (ide_cdrom_setup(drive)) {
2024 put_device(&info->dev);
2025 goto failed;
2026 }
2027
2028 ide_cd_read_toc(drive, &sense);
2029 g->fops = &idecd_ops;
2030 g->flags |= GENHD_FL_REMOVABLE;
2031 add_disk(g);
2032 return 0;
2033
2034 out_free_disk:
2035 put_disk(g);
2036 out_free_cd:
2037 kfree(info);
2038 failed:
2039 return -ENODEV;
2040 }
2041
2042 static void __exit ide_cdrom_exit(void)
2043 {
2044 driver_unregister(&ide_cdrom_driver.gen_driver);
2045 }
2046
2047 static int __init ide_cdrom_init(void)
2048 {
2049 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2050 return driver_register(&ide_cdrom_driver.gen_driver);
2051 }
2052
2053 MODULE_ALIAS("ide:*m-cdrom*");
2054 MODULE_ALIAS("ide-cd");
2055 module_init(ide_cdrom_init);
2056 module_exit(ide_cdrom_exit);
2057 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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