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Merge branch 'topic/misc' into for-linus
[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, "Call %s, sense_key: 0x%x\n", __func__,
104 sense->sense_key);
105
106 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
107 return 0;
108
109 switch (sense->sense_key) {
110 case NO_SENSE:
111 case RECOVERED_ERROR:
112 break;
113 case NOT_READY:
114 /*
115 * don't care about tray state messages for e.g. capacity
116 * commands or in-progress or becoming ready
117 */
118 if (sense->asc == 0x3a || sense->asc == 0x04)
119 break;
120 log = 1;
121 break;
122 case ILLEGAL_REQUEST:
123 /*
124 * don't log START_STOP unit with LoEj set, since we cannot
125 * reliably check if drive can auto-close
126 */
127 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
128 break;
129 log = 1;
130 break;
131 case UNIT_ATTENTION:
132 /*
133 * Make good and sure we've seen this potential media change.
134 * Some drives (i.e. Creative) fail to present the correct sense
135 * key in the error register.
136 */
137 cdrom_saw_media_change(drive);
138 break;
139 default:
140 log = 1;
141 break;
142 }
143 return log;
144 }
145
146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
147 struct request *failed_command,
148 struct request_sense *sense)
149 {
150 unsigned long sector;
151 unsigned long bio_sectors;
152 struct cdrom_info *info = drive->driver_data;
153
154 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
155 "sense_key: 0x%x\n", __func__, sense->error_code,
156 sense->sense_key);
157
158 if (failed_command)
159 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
160 __func__, failed_command->cmd[0]);
161
162 if (!cdrom_log_sense(drive, failed_command, sense))
163 return;
164
165 /*
166 * If a read toc is executed for a CD-R or CD-RW medium where the first
167 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
168 * confusing error)
169 */
170 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
171 if (sense->sense_key == 0x05 && sense->asc == 0x24)
172 return;
173
174 /* current error */
175 if (sense->error_code == 0x70) {
176 switch (sense->sense_key) {
177 case MEDIUM_ERROR:
178 case VOLUME_OVERFLOW:
179 case ILLEGAL_REQUEST:
180 if (!sense->valid)
181 break;
182 if (failed_command == NULL ||
183 !blk_fs_request(failed_command))
184 break;
185 sector = (sense->information[0] << 24) |
186 (sense->information[1] << 16) |
187 (sense->information[2] << 8) |
188 (sense->information[3]);
189
190 if (drive->queue->hardsect_size == 2048)
191 /* device sector size is 2K */
192 sector <<= 2;
193
194 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
195 sector &= ~(bio_sectors - 1);
196
197 /*
198 * The SCSI specification allows for the value
199 * returned by READ CAPACITY to be up to 75 2K
200 * sectors past the last readable block.
201 * Therefore, if we hit a medium error within the
202 * last 75 2K sectors, we decrease the saved size
203 * value.
204 */
205 if (sector < get_capacity(info->disk) &&
206 drive->probed_capacity - sector < 4 * 75)
207 set_capacity(info->disk, sector);
208 }
209 }
210
211 ide_cd_log_error(drive->name, failed_command, sense);
212 }
213
214 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
215 struct request *failed_command)
216 {
217 struct cdrom_info *info = drive->driver_data;
218 struct request *rq = &info->request_sense_request;
219
220 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
221
222 if (sense == NULL)
223 sense = &info->sense_data;
224
225 /* stuff the sense request in front of our current request */
226 blk_rq_init(NULL, rq);
227 rq->cmd_type = REQ_TYPE_ATA_PC;
228 rq->rq_disk = info->disk;
229
230 rq->data = sense;
231 rq->cmd[0] = GPCMD_REQUEST_SENSE;
232 rq->cmd[4] = 18;
233 rq->data_len = 18;
234
235 rq->cmd_type = REQ_TYPE_SENSE;
236 rq->cmd_flags |= REQ_PREEMPT;
237
238 /* NOTE! Save the failed command in "rq->buffer" */
239 rq->buffer = (void *) failed_command;
240
241 if (failed_command)
242 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
243 failed_command->cmd[0]);
244
245 ide_do_drive_cmd(drive, rq);
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, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
254 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
255 nsectors);
256
257 if (blk_sense_request(rq) && uptodate) {
258 /*
259 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
260 * failed request
261 */
262 struct request *failed = (struct request *) rq->buffer;
263 struct cdrom_info *info = drive->driver_data;
264 void *sense = &info->sense_data;
265
266 if (failed) {
267 if (failed->sense) {
268 sense = failed->sense;
269 failed->sense_len = rq->sense_len;
270 }
271 cdrom_analyze_sense_data(drive, failed, sense);
272 /*
273 * now end the failed request
274 */
275 if (blk_fs_request(failed)) {
276 if (ide_end_dequeued_request(drive, failed, 0,
277 failed->hard_nr_sectors))
278 BUG();
279 } else {
280 if (blk_end_request(failed, -EIO,
281 failed->data_len))
282 BUG();
283 }
284 } else
285 cdrom_analyze_sense_data(drive, NULL, sense);
286 }
287
288 if (!rq->current_nr_sectors && blk_fs_request(rq))
289 uptodate = 1;
290 /* make sure it's fully ended */
291 if (blk_pc_request(rq))
292 nsectors = (rq->data_len + 511) >> 9;
293 if (!nsectors)
294 nsectors = 1;
295
296 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
297 __func__, uptodate, nsectors);
298
299 ide_end_request(drive, uptodate, nsectors);
300 }
301
302 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
303 {
304 if (st & 0x80)
305 return;
306 ide_dump_status(drive, msg, st);
307 }
308
309 /*
310 * Returns:
311 * 0: if the request should be continued.
312 * 1: if the request was ended.
313 */
314 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
315 {
316 ide_hwif_t *hwif = drive->hwif;
317 struct request *rq = hwif->rq;
318 int stat, err, sense_key;
319
320 /* check for errors */
321 stat = hwif->tp_ops->read_status(hwif);
322
323 if (stat_ret)
324 *stat_ret = stat;
325
326 if (OK_STAT(stat, good_stat, BAD_R_STAT))
327 return 0;
328
329 /* get the IDE error register */
330 err = ide_read_error(drive);
331 sense_key = err >> 4;
332
333 if (rq == NULL) {
334 printk(KERN_ERR PFX "%s: missing rq in %s\n",
335 drive->name, __func__);
336 return 1;
337 }
338
339 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
340 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
341 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, 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, "Call %s, ireason: 0x%x, rw: 0x%x\n",
532 __func__, ireason, rw);
533
534 /*
535 * ireason == 0: the drive wants to receive data from us
536 * ireason == 2: the drive is expecting to transfer data to us
537 */
538 if (ireason == (!rw << 1))
539 return 0;
540 else if (ireason == (rw << 1)) {
541
542 /* whoops... */
543 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
544 drive->name, __func__);
545
546 ide_pad_transfer(drive, rw, len);
547 } else if (rw == 0 && ireason == 1) {
548 /*
549 * Some drives (ASUS) seem to tell us that status info is
550 * available. Just get it and ignore.
551 */
552 (void)hwif->tp_ops->read_status(hwif);
553 return 0;
554 } else {
555 /* drive wants a command packet, or invalid ireason... */
556 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
557 drive->name, __func__, ireason);
558 }
559
560 if (rq->cmd_type == REQ_TYPE_ATA_PC)
561 rq->cmd_flags |= REQ_FAILED;
562
563 cdrom_end_request(drive, 0);
564 return -1;
565 }
566
567 /*
568 * Assume that the drive will always provide data in multiples of at least
569 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
570 */
571 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
572 {
573 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
574
575 if ((len % SECTOR_SIZE) == 0)
576 return 0;
577
578 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
579 __func__, len);
580
581 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
582 printk(KERN_ERR PFX "This drive is not supported by this "
583 "version of the driver\n");
584 else {
585 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
586 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
587 }
588
589 return 1;
590 }
591
592 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
593 struct request *rq)
594 {
595 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
596 rq->cmd_flags);
597
598 if (rq_data_dir(rq) == READ) {
599 unsigned short sectors_per_frame =
600 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
601 int nskip = rq->sector & (sectors_per_frame - 1);
602
603 /*
604 * If the requested sector doesn't start on a frame boundary,
605 * we must adjust the start of the transfer so that it does,
606 * and remember to skip the first few sectors.
607 *
608 * If the rq->current_nr_sectors field is larger than the size
609 * of the buffer, it will mean that we're to skip a number of
610 * sectors equal to the amount by which rq->current_nr_sectors
611 * is larger than the buffer size.
612 */
613 if (nskip > 0) {
614 /* sanity check... */
615 if (rq->current_nr_sectors !=
616 bio_cur_sectors(rq->bio)) {
617 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
618 drive->name, __func__,
619 rq->current_nr_sectors);
620 cdrom_end_request(drive, 0);
621 return ide_stopped;
622 }
623 rq->current_nr_sectors += nskip;
624 }
625 }
626
627 /* set up the command */
628 rq->timeout = ATAPI_WAIT_PC;
629
630 return ide_started;
631 }
632
633 /*
634 * Fix up a possibly partially-processed request so that we can start it over
635 * entirely, or even put it back on the request queue.
636 */
637 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
638 {
639
640 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
641
642 if (rq->buffer != bio_data(rq->bio)) {
643 sector_t n =
644 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
645
646 rq->buffer = bio_data(rq->bio);
647 rq->nr_sectors += n;
648 rq->sector -= n;
649 }
650 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
651 rq->hard_cur_sectors = rq->current_nr_sectors;
652 rq->hard_nr_sectors = rq->nr_sectors;
653 rq->hard_sector = rq->sector;
654 rq->q->prep_rq_fn(rq->q, rq);
655 }
656
657 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
658 {
659 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
660 __func__, rq->cmd[0]);
661
662 /*
663 * Some of the trailing request sense fields are optional,
664 * and some drives don't send them. Sigh.
665 */
666 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
667 rq->data_len > 0 && rq->data_len <= 5)
668 while (rq->data_len > 0) {
669 *(u8 *)rq->data++ = 0;
670 --rq->data_len;
671 }
672 }
673
674 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
675 int write, void *buffer, unsigned *bufflen,
676 struct request_sense *sense, int timeout,
677 unsigned int cmd_flags)
678 {
679 struct cdrom_info *info = drive->driver_data;
680 struct request_sense local_sense;
681 int retries = 10;
682 unsigned int flags = 0;
683
684 if (!sense)
685 sense = &local_sense;
686
687 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
688 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
689 timeout, cmd_flags);
690
691 /* start of retry loop */
692 do {
693 struct request *rq;
694 int error;
695
696 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
697
698 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
699 rq->cmd_type = REQ_TYPE_ATA_PC;
700 rq->sense = sense;
701 rq->cmd_flags |= cmd_flags;
702 rq->timeout = timeout;
703 if (buffer) {
704 rq->data = buffer;
705 rq->data_len = *bufflen;
706 }
707
708 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
709
710 if (buffer)
711 *bufflen = rq->data_len;
712
713 flags = rq->cmd_flags;
714 blk_put_request(rq);
715
716 /*
717 * FIXME: we should probably abort/retry or something in case of
718 * failure.
719 */
720 if (flags & REQ_FAILED) {
721 /*
722 * The request failed. Retry if it was due to a unit
723 * attention status (usually means media was changed).
724 */
725 struct request_sense *reqbuf = sense;
726
727 if (reqbuf->sense_key == UNIT_ATTENTION)
728 cdrom_saw_media_change(drive);
729 else if (reqbuf->sense_key == NOT_READY &&
730 reqbuf->asc == 4 && reqbuf->ascq != 4) {
731 /*
732 * The drive is in the process of loading
733 * a disk. Retry, but wait a little to give
734 * the drive time to complete the load.
735 */
736 ssleep(2);
737 } else {
738 /* otherwise, don't retry */
739 retries = 0;
740 }
741 --retries;
742 }
743
744 /* end of retry loop */
745 } while ((flags & REQ_FAILED) && retries >= 0);
746
747 /* return an error if the command failed */
748 return (flags & REQ_FAILED) ? -EIO : 0;
749 }
750
751 /*
752 * Called from blk_end_request_callback() after the data of the request is
753 * completed and before the request itself is completed. By returning value '1',
754 * blk_end_request_callback() returns immediately without completing it.
755 */
756 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
757 {
758 return 1;
759 }
760
761 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
762 {
763 ide_hwif_t *hwif = drive->hwif;
764 struct request *rq = hwif->rq;
765 xfer_func_t *xferfunc;
766 ide_expiry_t *expiry = NULL;
767 int dma_error = 0, dma, stat, thislen, uptodate = 0;
768 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
769 unsigned int timeout;
770 u16 len;
771 u8 ireason;
772
773 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
774 __func__, rq->cmd[0], write);
775
776 /* check for errors */
777 dma = drive->dma;
778 if (dma) {
779 drive->dma = 0;
780 dma_error = hwif->dma_ops->dma_end(drive);
781 if (dma_error) {
782 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
783 write ? "write" : "read");
784 ide_dma_off(drive);
785 }
786 }
787
788 if (cdrom_decode_status(drive, 0, &stat))
789 return ide_stopped;
790
791 /* using dma, transfer is complete now */
792 if (dma) {
793 if (dma_error)
794 return ide_error(drive, "dma error", stat);
795 if (blk_fs_request(rq)) {
796 ide_end_request(drive, 1, rq->nr_sectors);
797 return ide_stopped;
798 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
799 ide_end_request(drive, 1, 1);
800 return ide_stopped;
801 }
802 goto end_request;
803 }
804
805 ide_read_bcount_and_ireason(drive, &len, &ireason);
806
807 thislen = blk_fs_request(rq) ? len : rq->data_len;
808 if (thislen > len)
809 thislen = len;
810
811 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
812 __func__, stat, thislen);
813
814 /* If DRQ is clear, the command has completed. */
815 if ((stat & ATA_DRQ) == 0) {
816 if (blk_fs_request(rq)) {
817 /*
818 * If we're not done reading/writing, complain.
819 * Otherwise, complete the command normally.
820 */
821 uptodate = 1;
822 if (rq->current_nr_sectors > 0) {
823 printk(KERN_ERR PFX "%s: %s: data underrun "
824 "(%d blocks)\n",
825 drive->name, __func__,
826 rq->current_nr_sectors);
827 if (!write)
828 rq->cmd_flags |= REQ_FAILED;
829 uptodate = 0;
830 }
831 cdrom_end_request(drive, uptodate);
832 return ide_stopped;
833 } else if (!blk_pc_request(rq)) {
834 ide_cd_request_sense_fixup(drive, rq);
835 /* complain if we still have data left to transfer */
836 uptodate = rq->data_len ? 0 : 1;
837 }
838 goto end_request;
839 }
840
841 /* check which way to transfer data */
842 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
843 return ide_stopped;
844
845 if (blk_fs_request(rq)) {
846 if (write == 0) {
847 int nskip;
848
849 if (ide_cd_check_transfer_size(drive, len)) {
850 cdrom_end_request(drive, 0);
851 return ide_stopped;
852 }
853
854 /*
855 * First, figure out if we need to bit-bucket
856 * any of the leading sectors.
857 */
858 nskip = min_t(int, rq->current_nr_sectors
859 - bio_cur_sectors(rq->bio),
860 thislen >> 9);
861 if (nskip > 0) {
862 ide_pad_transfer(drive, write, nskip << 9);
863 rq->current_nr_sectors -= nskip;
864 thislen -= (nskip << 9);
865 }
866 }
867 }
868
869 if (ireason == 0) {
870 write = 1;
871 xferfunc = hwif->tp_ops->output_data;
872 } else {
873 write = 0;
874 xferfunc = hwif->tp_ops->input_data;
875 }
876
877 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
878 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
879
880 /* transfer data */
881 while (thislen > 0) {
882 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
883 int blen = rq->data_len;
884
885 /* bio backed? */
886 if (rq->bio) {
887 if (blk_fs_request(rq)) {
888 ptr = rq->buffer;
889 blen = rq->current_nr_sectors << 9;
890 } else {
891 ptr = bio_data(rq->bio);
892 blen = bio_iovec(rq->bio)->bv_len;
893 }
894 }
895
896 if (!ptr) {
897 if (blk_fs_request(rq) && !write)
898 /*
899 * If the buffers are full, pipe the rest into
900 * oblivion.
901 */
902 ide_pad_transfer(drive, 0, thislen);
903 else {
904 printk(KERN_ERR PFX "%s: confused, missing data\n",
905 drive->name);
906 blk_dump_rq_flags(rq, rq_data_dir(rq)
907 ? "cdrom_newpc_intr, write"
908 : "cdrom_newpc_intr, read");
909 }
910 break;
911 }
912
913 if (blen > thislen)
914 blen = thislen;
915
916 xferfunc(drive, NULL, ptr, blen);
917
918 thislen -= blen;
919 len -= blen;
920
921 if (blk_fs_request(rq)) {
922 rq->buffer += blen;
923 rq->nr_sectors -= (blen >> 9);
924 rq->current_nr_sectors -= (blen >> 9);
925 rq->sector += (blen >> 9);
926
927 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
928 cdrom_end_request(drive, 1);
929 } else {
930 rq->data_len -= blen;
931
932 /*
933 * The request can't be completed until DRQ is cleared.
934 * So complete the data, but don't complete the request
935 * using the dummy function for the callback feature
936 * of blk_end_request_callback().
937 */
938 if (rq->bio)
939 blk_end_request_callback(rq, 0, blen,
940 cdrom_newpc_intr_dummy_cb);
941 else
942 rq->data += blen;
943 }
944 if (!write && blk_sense_request(rq))
945 rq->sense_len += blen;
946 }
947
948 /* pad, if necessary */
949 if (!blk_fs_request(rq) && len > 0)
950 ide_pad_transfer(drive, write, len);
951
952 if (blk_pc_request(rq)) {
953 timeout = rq->timeout;
954 } else {
955 timeout = ATAPI_WAIT_PC;
956 if (!blk_fs_request(rq))
957 expiry = ide_cd_expiry;
958 }
959
960 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
961 return ide_started;
962
963 end_request:
964 if (blk_pc_request(rq)) {
965 unsigned int dlen = rq->data_len;
966
967 if (dma)
968 rq->data_len = 0;
969
970 if (blk_end_request(rq, 0, dlen))
971 BUG();
972
973 hwif->rq = NULL;
974 } else {
975 if (!uptodate)
976 rq->cmd_flags |= REQ_FAILED;
977 cdrom_end_request(drive, uptodate);
978 }
979 return ide_stopped;
980 }
981
982 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
983 {
984 struct cdrom_info *cd = drive->driver_data;
985 int write = rq_data_dir(rq) == WRITE;
986 unsigned short sectors_per_frame =
987 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
988
989 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
990 "secs_per_frame: %u\n",
991 __func__, rq->cmd[0], write, sectors_per_frame);
992
993 if (write) {
994 /* disk has become write protected */
995 if (get_disk_ro(cd->disk)) {
996 cdrom_end_request(drive, 0);
997 return ide_stopped;
998 }
999 } else {
1000 /*
1001 * We may be retrying this request after an error. Fix up any
1002 * weirdness which might be present in the request packet.
1003 */
1004 ide_cd_restore_request(drive, rq);
1005 }
1006
1007 /* use DMA, if possible / writes *must* be hardware frame aligned */
1008 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1009 (rq->sector & (sectors_per_frame - 1))) {
1010 if (write) {
1011 cdrom_end_request(drive, 0);
1012 return ide_stopped;
1013 }
1014 drive->dma = 0;
1015 } else
1016 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1017
1018 if (write)
1019 cd->devinfo.media_written = 1;
1020
1021 return ide_started;
1022 }
1023
1024 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1025 {
1026
1027 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1028 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1029 rq->cmd_type);
1030
1031 if (blk_pc_request(rq))
1032 rq->cmd_flags |= REQ_QUIET;
1033 else
1034 rq->cmd_flags &= ~REQ_FAILED;
1035
1036 drive->dma = 0;
1037
1038 /* sg request */
1039 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1040 struct request_queue *q = drive->queue;
1041 unsigned int alignment;
1042 char *buf;
1043
1044 if (rq->bio)
1045 buf = bio_data(rq->bio);
1046 else
1047 buf = rq->data;
1048
1049 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1050
1051 /*
1052 * check if dma is safe
1053 *
1054 * NOTE! The "len" and "addr" checks should possibly have
1055 * separate masks.
1056 */
1057 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1058 if ((unsigned long)buf & alignment
1059 || rq->data_len & q->dma_pad_mask
1060 || object_is_on_stack(buf))
1061 drive->dma = 0;
1062 }
1063 }
1064
1065 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1066 sector_t block)
1067 {
1068 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1069 "rq->cmd_type: 0x%x, block: %llu\n",
1070 __func__, rq->cmd[0], rq->cmd_type,
1071 (unsigned long long)block);
1072
1073 if (blk_fs_request(rq)) {
1074 if (cdrom_start_rw(drive, rq) == ide_stopped)
1075 return ide_stopped;
1076
1077 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1078 return ide_stopped;
1079 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1080 rq->cmd_type == REQ_TYPE_ATA_PC) {
1081 if (!rq->timeout)
1082 rq->timeout = ATAPI_WAIT_PC;
1083
1084 cdrom_do_block_pc(drive, rq);
1085 } else if (blk_special_request(rq)) {
1086 /* right now this can only be a reset... */
1087 cdrom_end_request(drive, 1);
1088 return ide_stopped;
1089 } else {
1090 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1091 cdrom_end_request(drive, 0);
1092 return ide_stopped;
1093 }
1094
1095 return ide_issue_pc(drive);
1096 }
1097
1098 /*
1099 * Ioctl handling.
1100 *
1101 * Routines which queue packet commands take as a final argument a pointer to a
1102 * request_sense struct. If execution of the command results in an error with a
1103 * CHECK CONDITION status, this structure will be filled with the results of the
1104 * subsequent request sense command. The pointer can also be NULL, in which case
1105 * no sense information is returned.
1106 */
1107 static void msf_from_bcd(struct atapi_msf *msf)
1108 {
1109 msf->minute = bcd2bin(msf->minute);
1110 msf->second = bcd2bin(msf->second);
1111 msf->frame = bcd2bin(msf->frame);
1112 }
1113
1114 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1115 {
1116 struct cdrom_info *info = drive->driver_data;
1117 struct cdrom_device_info *cdi = &info->devinfo;
1118 unsigned char cmd[BLK_MAX_CDB];
1119
1120 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1121
1122 memset(cmd, 0, BLK_MAX_CDB);
1123 cmd[0] = GPCMD_TEST_UNIT_READY;
1124
1125 /*
1126 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1127 * instead of supporting the LOAD_UNLOAD opcode.
1128 */
1129 cmd[7] = cdi->sanyo_slot % 3;
1130
1131 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1132 }
1133
1134 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1135 unsigned long *sectors_per_frame,
1136 struct request_sense *sense)
1137 {
1138 struct {
1139 __be32 lba;
1140 __be32 blocklen;
1141 } capbuf;
1142
1143 int stat;
1144 unsigned char cmd[BLK_MAX_CDB];
1145 unsigned len = sizeof(capbuf);
1146 u32 blocklen;
1147
1148 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1149
1150 memset(cmd, 0, BLK_MAX_CDB);
1151 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1152
1153 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1154 REQ_QUIET);
1155 if (stat)
1156 return stat;
1157
1158 /*
1159 * Sanity check the given block size
1160 */
1161 blocklen = be32_to_cpu(capbuf.blocklen);
1162 switch (blocklen) {
1163 case 512:
1164 case 1024:
1165 case 2048:
1166 case 4096:
1167 break;
1168 default:
1169 printk(KERN_ERR PFX "%s: weird block size %u\n",
1170 drive->name, blocklen);
1171 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1172 drive->name);
1173 blocklen = 2048;
1174 break;
1175 }
1176
1177 *capacity = 1 + be32_to_cpu(capbuf.lba);
1178 *sectors_per_frame = blocklen >> SECTOR_BITS;
1179
1180 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1181 __func__, *capacity, *sectors_per_frame);
1182
1183 return 0;
1184 }
1185
1186 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1187 int format, char *buf, int buflen,
1188 struct request_sense *sense)
1189 {
1190 unsigned char cmd[BLK_MAX_CDB];
1191
1192 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1193
1194 memset(cmd, 0, BLK_MAX_CDB);
1195
1196 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1197 cmd[6] = trackno;
1198 cmd[7] = (buflen >> 8);
1199 cmd[8] = (buflen & 0xff);
1200 cmd[9] = (format << 6);
1201
1202 if (msf_flag)
1203 cmd[1] = 2;
1204
1205 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1206 }
1207
1208 /* Try to read the entire TOC for the disk into our internal buffer. */
1209 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1210 {
1211 int stat, ntracks, i;
1212 struct cdrom_info *info = drive->driver_data;
1213 struct cdrom_device_info *cdi = &info->devinfo;
1214 struct atapi_toc *toc = info->toc;
1215 struct {
1216 struct atapi_toc_header hdr;
1217 struct atapi_toc_entry ent;
1218 } ms_tmp;
1219 long last_written;
1220 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1221
1222 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1223
1224 if (toc == NULL) {
1225 /* try to allocate space */
1226 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1227 if (toc == NULL) {
1228 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1229 drive->name);
1230 return -ENOMEM;
1231 }
1232 info->toc = toc;
1233 }
1234
1235 /*
1236 * Check to see if the existing data is still valid. If it is,
1237 * just return.
1238 */
1239 (void) cdrom_check_status(drive, sense);
1240
1241 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1242 return 0;
1243
1244 /* try to get the total cdrom capacity and sector size */
1245 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1246 sense);
1247 if (stat)
1248 toc->capacity = 0x1fffff;
1249
1250 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1251 /* save a private copy of the TOC capacity for error handling */
1252 drive->probed_capacity = toc->capacity * sectors_per_frame;
1253
1254 blk_queue_hardsect_size(drive->queue,
1255 sectors_per_frame << SECTOR_BITS);
1256
1257 /* first read just the header, so we know how long the TOC is */
1258 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1259 sizeof(struct atapi_toc_header), sense);
1260 if (stat)
1261 return stat;
1262
1263 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1264 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1265 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1266 }
1267
1268 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1269 if (ntracks <= 0)
1270 return -EIO;
1271 if (ntracks > MAX_TRACKS)
1272 ntracks = MAX_TRACKS;
1273
1274 /* now read the whole schmeer */
1275 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1276 (char *)&toc->hdr,
1277 sizeof(struct atapi_toc_header) +
1278 (ntracks + 1) *
1279 sizeof(struct atapi_toc_entry), sense);
1280
1281 if (stat && toc->hdr.first_track > 1) {
1282 /*
1283 * Cds with CDI tracks only don't have any TOC entries, despite
1284 * of this the returned values are
1285 * first_track == last_track = number of CDI tracks + 1,
1286 * so that this case is indistinguishable from the same layout
1287 * plus an additional audio track. If we get an error for the
1288 * regular case, we assume a CDI without additional audio
1289 * tracks. In this case the readable TOC is empty (CDI tracks
1290 * are not included) and only holds the Leadout entry.
1291 *
1292 * Heiko Eißfeldt.
1293 */
1294 ntracks = 0;
1295 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1296 (char *)&toc->hdr,
1297 sizeof(struct atapi_toc_header) +
1298 (ntracks + 1) *
1299 sizeof(struct atapi_toc_entry),
1300 sense);
1301 if (stat)
1302 return stat;
1303
1304 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1305 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1306 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1307 } else {
1308 toc->hdr.first_track = CDROM_LEADOUT;
1309 toc->hdr.last_track = CDROM_LEADOUT;
1310 }
1311 }
1312
1313 if (stat)
1314 return stat;
1315
1316 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1317
1318 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1319 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1320 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1321 }
1322
1323 for (i = 0; i <= ntracks; i++) {
1324 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1325 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1326 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1327 msf_from_bcd(&toc->ent[i].addr.msf);
1328 }
1329 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1330 toc->ent[i].addr.msf.second,
1331 toc->ent[i].addr.msf.frame);
1332 }
1333
1334 if (toc->hdr.first_track != CDROM_LEADOUT) {
1335 /* read the multisession information */
1336 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1337 sizeof(ms_tmp), sense);
1338 if (stat)
1339 return stat;
1340
1341 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1342 } else {
1343 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1344 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1345 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1346 }
1347
1348 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1349 /* re-read multisession information using MSF format */
1350 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1351 sizeof(ms_tmp), sense);
1352 if (stat)
1353 return stat;
1354
1355 msf_from_bcd(&ms_tmp.ent.addr.msf);
1356 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1357 ms_tmp.ent.addr.msf.second,
1358 ms_tmp.ent.addr.msf.frame);
1359 }
1360
1361 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1362
1363 /* now try to get the total cdrom capacity */
1364 stat = cdrom_get_last_written(cdi, &last_written);
1365 if (!stat && (last_written > toc->capacity)) {
1366 toc->capacity = last_written;
1367 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1368 drive->probed_capacity = toc->capacity * sectors_per_frame;
1369 }
1370
1371 /* Remember that we've read this stuff. */
1372 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1373
1374 return 0;
1375 }
1376
1377 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1378 {
1379 struct cdrom_info *info = drive->driver_data;
1380 struct cdrom_device_info *cdi = &info->devinfo;
1381 struct packet_command cgc;
1382 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1383
1384 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1385
1386 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1387 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1388
1389 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1390 do {
1391 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1392 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1393 if (!stat)
1394 break;
1395 } while (--attempts);
1396 return stat;
1397 }
1398
1399 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1400 {
1401 struct cdrom_info *cd = drive->driver_data;
1402 u16 curspeed, maxspeed;
1403
1404 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1405
1406 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1407 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1408 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1409 } else {
1410 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1411 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1412 }
1413
1414 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1415 __func__, curspeed, maxspeed);
1416
1417 cd->current_speed = (curspeed + (176/2)) / 176;
1418 cd->max_speed = (maxspeed + (176/2)) / 176;
1419 }
1420
1421 #define IDE_CD_CAPABILITIES \
1422 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1423 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1424 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1425 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1426 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1427
1428 static struct cdrom_device_ops ide_cdrom_dops = {
1429 .open = ide_cdrom_open_real,
1430 .release = ide_cdrom_release_real,
1431 .drive_status = ide_cdrom_drive_status,
1432 .media_changed = ide_cdrom_check_media_change_real,
1433 .tray_move = ide_cdrom_tray_move,
1434 .lock_door = ide_cdrom_lock_door,
1435 .select_speed = ide_cdrom_select_speed,
1436 .get_last_session = ide_cdrom_get_last_session,
1437 .get_mcn = ide_cdrom_get_mcn,
1438 .reset = ide_cdrom_reset,
1439 .audio_ioctl = ide_cdrom_audio_ioctl,
1440 .capability = IDE_CD_CAPABILITIES,
1441 .generic_packet = ide_cdrom_packet,
1442 };
1443
1444 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1445 {
1446 struct cdrom_info *info = drive->driver_data;
1447 struct cdrom_device_info *devinfo = &info->devinfo;
1448
1449 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1450
1451 devinfo->ops = &ide_cdrom_dops;
1452 devinfo->speed = info->current_speed;
1453 devinfo->capacity = nslots;
1454 devinfo->handle = drive;
1455 strcpy(devinfo->name, drive->name);
1456
1457 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1458 devinfo->mask |= CDC_SELECT_SPEED;
1459
1460 devinfo->disk = info->disk;
1461 return register_cdrom(devinfo);
1462 }
1463
1464 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1465 {
1466 struct cdrom_info *cd = drive->driver_data;
1467 struct cdrom_device_info *cdi = &cd->devinfo;
1468 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1469 mechtype_t mechtype;
1470 int nslots = 1;
1471
1472 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1473 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1474 drive->atapi_flags);
1475
1476 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1477 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1478 CDC_MO_DRIVE | CDC_RAM);
1479
1480 if (drive->media == ide_optical) {
1481 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1482 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1483 drive->name);
1484 return nslots;
1485 }
1486
1487 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1488 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1489 cdi->mask &= ~CDC_PLAY_AUDIO;
1490 return nslots;
1491 }
1492
1493 /*
1494 * We have to cheat a little here. the packet will eventually be queued
1495 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1496 * Since this device hasn't been registered with the Uniform layer yet,
1497 * it can't do this. Same goes for cdi->ops.
1498 */
1499 cdi->handle = drive;
1500 cdi->ops = &ide_cdrom_dops;
1501
1502 if (ide_cdrom_get_capabilities(drive, buf))
1503 return 0;
1504
1505 if ((buf[8 + 6] & 0x01) == 0)
1506 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1507 if (buf[8 + 6] & 0x08)
1508 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1509 if (buf[8 + 3] & 0x01)
1510 cdi->mask &= ~CDC_CD_R;
1511 if (buf[8 + 3] & 0x02)
1512 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1513 if (buf[8 + 2] & 0x38)
1514 cdi->mask &= ~CDC_DVD;
1515 if (buf[8 + 3] & 0x20)
1516 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1517 if (buf[8 + 3] & 0x10)
1518 cdi->mask &= ~CDC_DVD_R;
1519 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1520 cdi->mask &= ~CDC_PLAY_AUDIO;
1521
1522 mechtype = buf[8 + 6] >> 5;
1523 if (mechtype == mechtype_caddy ||
1524 mechtype == mechtype_popup ||
1525 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1526 cdi->mask |= CDC_CLOSE_TRAY;
1527
1528 if (cdi->sanyo_slot > 0) {
1529 cdi->mask &= ~CDC_SELECT_DISC;
1530 nslots = 3;
1531 } else if (mechtype == mechtype_individual_changer ||
1532 mechtype == mechtype_cartridge_changer) {
1533 nslots = cdrom_number_of_slots(cdi);
1534 if (nslots > 1)
1535 cdi->mask &= ~CDC_SELECT_DISC;
1536 }
1537
1538 ide_cdrom_update_speed(drive, buf);
1539
1540 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1541
1542 /* don't print speed if the drive reported 0 */
1543 if (cd->max_speed)
1544 printk(KERN_CONT " %dX", cd->max_speed);
1545
1546 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1547
1548 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1549 printk(KERN_CONT " DVD%s%s",
1550 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1551 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1552
1553 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1554 printk(KERN_CONT " CD%s%s",
1555 (cdi->mask & CDC_CD_R) ? "" : "-R",
1556 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1557
1558 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1559 printk(KERN_CONT " changer w/%d slots", nslots);
1560 else
1561 printk(KERN_CONT " drive");
1562
1563 printk(KERN_CONT ", %dkB Cache\n",
1564 be16_to_cpup((__be16 *)&buf[8 + 12]));
1565
1566 return nslots;
1567 }
1568
1569 /* standard prep_rq_fn that builds 10 byte cmds */
1570 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1571 {
1572 int hard_sect = queue_hardsect_size(q);
1573 long block = (long)rq->hard_sector / (hard_sect >> 9);
1574 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1575
1576 memset(rq->cmd, 0, BLK_MAX_CDB);
1577
1578 if (rq_data_dir(rq) == READ)
1579 rq->cmd[0] = GPCMD_READ_10;
1580 else
1581 rq->cmd[0] = GPCMD_WRITE_10;
1582
1583 /*
1584 * fill in lba
1585 */
1586 rq->cmd[2] = (block >> 24) & 0xff;
1587 rq->cmd[3] = (block >> 16) & 0xff;
1588 rq->cmd[4] = (block >> 8) & 0xff;
1589 rq->cmd[5] = block & 0xff;
1590
1591 /*
1592 * and transfer length
1593 */
1594 rq->cmd[7] = (blocks >> 8) & 0xff;
1595 rq->cmd[8] = blocks & 0xff;
1596 rq->cmd_len = 10;
1597 return BLKPREP_OK;
1598 }
1599
1600 /*
1601 * Most of the SCSI commands are supported directly by ATAPI devices.
1602 * This transform handles the few exceptions.
1603 */
1604 static int ide_cdrom_prep_pc(struct request *rq)
1605 {
1606 u8 *c = rq->cmd;
1607
1608 /* transform 6-byte read/write commands to the 10-byte version */
1609 if (c[0] == READ_6 || c[0] == WRITE_6) {
1610 c[8] = c[4];
1611 c[5] = c[3];
1612 c[4] = c[2];
1613 c[3] = c[1] & 0x1f;
1614 c[2] = 0;
1615 c[1] &= 0xe0;
1616 c[0] += (READ_10 - READ_6);
1617 rq->cmd_len = 10;
1618 return BLKPREP_OK;
1619 }
1620
1621 /*
1622 * it's silly to pretend we understand 6-byte sense commands, just
1623 * reject with ILLEGAL_REQUEST and the caller should take the
1624 * appropriate action
1625 */
1626 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1627 rq->errors = ILLEGAL_REQUEST;
1628 return BLKPREP_KILL;
1629 }
1630
1631 return BLKPREP_OK;
1632 }
1633
1634 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1635 {
1636 if (blk_fs_request(rq))
1637 return ide_cdrom_prep_fs(q, rq);
1638 else if (blk_pc_request(rq))
1639 return ide_cdrom_prep_pc(rq);
1640
1641 return 0;
1642 }
1643
1644 struct cd_list_entry {
1645 const char *id_model;
1646 const char *id_firmware;
1647 unsigned int cd_flags;
1648 };
1649
1650 #ifdef CONFIG_IDE_PROC_FS
1651 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1652 {
1653 unsigned long capacity, sectors_per_frame;
1654
1655 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1656 return 0;
1657
1658 return capacity * sectors_per_frame;
1659 }
1660
1661 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1662 int count, int *eof, void *data)
1663 {
1664 ide_drive_t *drive = data;
1665 int len;
1666
1667 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1668 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1669 }
1670
1671 static ide_proc_entry_t idecd_proc[] = {
1672 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1673 { NULL, 0, NULL, NULL }
1674 };
1675
1676 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1677 {
1678 return idecd_proc;
1679 }
1680
1681 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1682 {
1683 return NULL;
1684 }
1685 #endif
1686
1687 static const struct cd_list_entry ide_cd_quirks_list[] = {
1688 /* Limit transfer size per interrupt. */
1689 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1690 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1691 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1692 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1693 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1694 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1695 IDE_AFLAG_PRE_ATAPI12, },
1696 /* Vertos 300, some versions of this drive like to talk BCD. */
1697 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1698 /* Vertos 600 ESD. */
1699 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1700 /*
1701 * Sanyo 3 CD changer uses a non-standard command for CD changing
1702 * (by default standard ATAPI support for CD changers is used).
1703 */
1704 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1705 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1706 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1707 /* Stingray 8X CD-ROM. */
1708 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1709 /*
1710 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1711 * mode sense page capabilities size, but older drives break.
1712 */
1713 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1714 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1715 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1716 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1717 /*
1718 * Some drives used by Apple don't advertise audio play
1719 * but they do support reading TOC & audio datas.
1720 */
1721 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1722 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1723 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1724 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1725 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1726 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1727 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1728 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1729 { NULL, NULL, 0 }
1730 };
1731
1732 static unsigned int ide_cd_flags(u16 *id)
1733 {
1734 const struct cd_list_entry *cle = ide_cd_quirks_list;
1735
1736 while (cle->id_model) {
1737 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1738 (cle->id_firmware == NULL ||
1739 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1740 return cle->cd_flags;
1741 cle++;
1742 }
1743
1744 return 0;
1745 }
1746
1747 static int ide_cdrom_setup(ide_drive_t *drive)
1748 {
1749 struct cdrom_info *cd = drive->driver_data;
1750 struct cdrom_device_info *cdi = &cd->devinfo;
1751 u16 *id = drive->id;
1752 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1753 int nslots;
1754
1755 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1756
1757 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1758 blk_queue_dma_alignment(drive->queue, 31);
1759 blk_queue_update_dma_pad(drive->queue, 15);
1760 drive->queue->unplug_delay = (1 * HZ) / 1000;
1761 if (!drive->queue->unplug_delay)
1762 drive->queue->unplug_delay = 1;
1763
1764 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1765 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1766
1767 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1768 fw_rev[4] == '1' && fw_rev[6] <= '2')
1769 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1770 IDE_AFLAG_TOCADDR_AS_BCD);
1771 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1772 fw_rev[4] == '1' && fw_rev[6] <= '2')
1773 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1774 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1775 /* 3 => use CD in slot 0 */
1776 cdi->sanyo_slot = 3;
1777
1778 nslots = ide_cdrom_probe_capabilities(drive);
1779
1780 /* set correct block size */
1781 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1782
1783 if (ide_cdrom_register(drive, nslots)) {
1784 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1785 " cdrom driver.\n", drive->name, __func__);
1786 cd->devinfo.handle = NULL;
1787 return 1;
1788 }
1789
1790 ide_proc_register_driver(drive, cd->driver);
1791 return 0;
1792 }
1793
1794 static void ide_cd_remove(ide_drive_t *drive)
1795 {
1796 struct cdrom_info *info = drive->driver_data;
1797
1798 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1799
1800 ide_proc_unregister_driver(drive, info->driver);
1801 device_del(&info->dev);
1802 del_gendisk(info->disk);
1803
1804 mutex_lock(&idecd_ref_mutex);
1805 put_device(&info->dev);
1806 mutex_unlock(&idecd_ref_mutex);
1807 }
1808
1809 static void ide_cd_release(struct device *dev)
1810 {
1811 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1812 struct cdrom_device_info *devinfo = &info->devinfo;
1813 ide_drive_t *drive = info->drive;
1814 struct gendisk *g = info->disk;
1815
1816 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1817
1818 kfree(info->toc);
1819 if (devinfo->handle == drive)
1820 unregister_cdrom(devinfo);
1821 drive->driver_data = NULL;
1822 blk_queue_prep_rq(drive->queue, NULL);
1823 g->private_data = NULL;
1824 put_disk(g);
1825 kfree(info);
1826 }
1827
1828 static int ide_cd_probe(ide_drive_t *);
1829
1830 static struct ide_driver ide_cdrom_driver = {
1831 .gen_driver = {
1832 .owner = THIS_MODULE,
1833 .name = "ide-cdrom",
1834 .bus = &ide_bus_type,
1835 },
1836 .probe = ide_cd_probe,
1837 .remove = ide_cd_remove,
1838 .version = IDECD_VERSION,
1839 .do_request = ide_cd_do_request,
1840 .end_request = ide_end_request,
1841 #ifdef CONFIG_IDE_PROC_FS
1842 .proc_entries = ide_cd_proc_entries,
1843 .proc_devsets = ide_cd_proc_devsets,
1844 #endif
1845 };
1846
1847 static int idecd_open(struct block_device *bdev, fmode_t mode)
1848 {
1849 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1850 int rc = -ENOMEM;
1851
1852 if (!info)
1853 return -ENXIO;
1854
1855 rc = cdrom_open(&info->devinfo, bdev, mode);
1856
1857 if (rc < 0)
1858 ide_cd_put(info);
1859
1860 return rc;
1861 }
1862
1863 static int idecd_release(struct gendisk *disk, fmode_t mode)
1864 {
1865 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1866
1867 cdrom_release(&info->devinfo, mode);
1868
1869 ide_cd_put(info);
1870
1871 return 0;
1872 }
1873
1874 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1875 {
1876 struct packet_command cgc;
1877 char buffer[16];
1878 int stat;
1879 char spindown;
1880
1881 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1882 return -EFAULT;
1883
1884 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1885
1886 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1887 if (stat)
1888 return stat;
1889
1890 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1891 return cdrom_mode_select(cdi, &cgc);
1892 }
1893
1894 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1895 {
1896 struct packet_command cgc;
1897 char buffer[16];
1898 int stat;
1899 char spindown;
1900
1901 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1902
1903 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1904 if (stat)
1905 return stat;
1906
1907 spindown = buffer[11] & 0x0f;
1908 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1909 return -EFAULT;
1910 return 0;
1911 }
1912
1913 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1914 unsigned int cmd, unsigned long arg)
1915 {
1916 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1917 int err;
1918
1919 switch (cmd) {
1920 case CDROMSETSPINDOWN:
1921 return idecd_set_spindown(&info->devinfo, arg);
1922 case CDROMGETSPINDOWN:
1923 return idecd_get_spindown(&info->devinfo, arg);
1924 default:
1925 break;
1926 }
1927
1928 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1929 if (err == -EINVAL)
1930 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1931
1932 return err;
1933 }
1934
1935 static int idecd_media_changed(struct gendisk *disk)
1936 {
1937 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1938 return cdrom_media_changed(&info->devinfo);
1939 }
1940
1941 static int idecd_revalidate_disk(struct gendisk *disk)
1942 {
1943 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1944 struct request_sense sense;
1945
1946 ide_cd_read_toc(info->drive, &sense);
1947
1948 return 0;
1949 }
1950
1951 static struct block_device_operations idecd_ops = {
1952 .owner = THIS_MODULE,
1953 .open = idecd_open,
1954 .release = idecd_release,
1955 .locked_ioctl = idecd_ioctl,
1956 .media_changed = idecd_media_changed,
1957 .revalidate_disk = idecd_revalidate_disk
1958 };
1959
1960 /* module options */
1961 static char *ignore;
1962 module_param(ignore, charp, 0400);
1963
1964 static unsigned long debug_mask;
1965 module_param(debug_mask, ulong, 0644);
1966
1967 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1968
1969 static int ide_cd_probe(ide_drive_t *drive)
1970 {
1971 struct cdrom_info *info;
1972 struct gendisk *g;
1973 struct request_sense sense;
1974
1975 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1976 "drive->media: 0x%x\n", __func__, drive->driver_req,
1977 drive->media);
1978
1979 if (!strstr("ide-cdrom", drive->driver_req))
1980 goto failed;
1981
1982 if (drive->media != ide_cdrom && drive->media != ide_optical)
1983 goto failed;
1984
1985 /* skip drives that we were told to ignore */
1986 if (ignore != NULL) {
1987 if (strstr(ignore, drive->name)) {
1988 printk(KERN_INFO PFX "ignoring drive %s\n",
1989 drive->name);
1990 goto failed;
1991 }
1992 }
1993
1994 drive->debug_mask = debug_mask;
1995 drive->irq_handler = cdrom_newpc_intr;
1996
1997 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1998 if (info == NULL) {
1999 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2000 drive->name);
2001 goto failed;
2002 }
2003
2004 g = alloc_disk(1 << PARTN_BITS);
2005 if (!g)
2006 goto out_free_cd;
2007
2008 ide_init_disk(g, drive);
2009
2010 info->dev.parent = &drive->gendev;
2011 info->dev.release = ide_cd_release;
2012 dev_set_name(&info->dev, dev_name(&drive->gendev));
2013
2014 if (device_register(&info->dev))
2015 goto out_free_disk;
2016
2017 info->drive = drive;
2018 info->driver = &ide_cdrom_driver;
2019 info->disk = g;
2020
2021 g->private_data = &info->driver;
2022
2023 drive->driver_data = info;
2024
2025 g->minors = 1;
2026 g->driverfs_dev = &drive->gendev;
2027 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2028 if (ide_cdrom_setup(drive)) {
2029 put_device(&info->dev);
2030 goto failed;
2031 }
2032
2033 ide_cd_read_toc(drive, &sense);
2034 g->fops = &idecd_ops;
2035 g->flags |= GENHD_FL_REMOVABLE;
2036 add_disk(g);
2037 return 0;
2038
2039 out_free_disk:
2040 put_disk(g);
2041 out_free_cd:
2042 kfree(info);
2043 failed:
2044 return -ENODEV;
2045 }
2046
2047 static void __exit ide_cdrom_exit(void)
2048 {
2049 driver_unregister(&ide_cdrom_driver.gen_driver);
2050 }
2051
2052 static int __init ide_cdrom_init(void)
2053 {
2054 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2055 return driver_register(&ide_cdrom_driver.gen_driver);
2056 }
2057
2058 MODULE_ALIAS("ide:*m-cdrom*");
2059 MODULE_ALIAS("ide-cd");
2060 module_init(ide_cdrom_init);
2061 module_exit(ide_cdrom_exit);
2062 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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