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Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[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 drive->hwif->rq = NULL;
246
247 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
248 }
249
250 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
251 {
252 struct request *rq = drive->hwif->rq;
253 int nsectors = rq->hard_cur_sectors;
254
255 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
256 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
257 nsectors);
258
259 if (blk_sense_request(rq) && uptodate) {
260 /*
261 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
262 * failed request
263 */
264 struct request *failed = (struct request *) rq->buffer;
265 struct cdrom_info *info = drive->driver_data;
266 void *sense = &info->sense_data;
267
268 if (failed) {
269 if (failed->sense) {
270 sense = failed->sense;
271 failed->sense_len = rq->sense_len;
272 }
273 cdrom_analyze_sense_data(drive, failed, sense);
274 /*
275 * now end the failed request
276 */
277 if (blk_fs_request(failed)) {
278 if (ide_end_dequeued_request(drive, failed, 0,
279 failed->hard_nr_sectors))
280 BUG();
281 } else {
282 if (blk_end_request(failed, -EIO,
283 failed->data_len))
284 BUG();
285 }
286 } else
287 cdrom_analyze_sense_data(drive, NULL, sense);
288 }
289
290 if (!rq->current_nr_sectors && blk_fs_request(rq))
291 uptodate = 1;
292 /* make sure it's fully ended */
293 if (blk_pc_request(rq))
294 nsectors = (rq->data_len + 511) >> 9;
295 if (!nsectors)
296 nsectors = 1;
297
298 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
299 __func__, uptodate, nsectors);
300
301 ide_end_request(drive, uptodate, nsectors);
302 }
303
304 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
305 {
306 if (st & 0x80)
307 return;
308 ide_dump_status(drive, msg, st);
309 }
310
311 /*
312 * Returns:
313 * 0: if the request should be continued.
314 * 1: if the request was ended.
315 */
316 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
317 {
318 ide_hwif_t *hwif = drive->hwif;
319 struct request *rq = hwif->rq;
320 int stat, err, sense_key;
321
322 /* check for errors */
323 stat = hwif->tp_ops->read_status(hwif);
324
325 if (stat_ret)
326 *stat_ret = stat;
327
328 if (OK_STAT(stat, good_stat, BAD_R_STAT))
329 return 0;
330
331 /* get the IDE error register */
332 err = ide_read_error(drive);
333 sense_key = err >> 4;
334
335 if (rq == NULL) {
336 printk(KERN_ERR PFX "%s: missing rq in %s\n",
337 drive->name, __func__);
338 return 1;
339 }
340
341 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
342 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
343 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
344
345 if (blk_sense_request(rq)) {
346 /*
347 * We got an error trying to get sense info from the drive
348 * (probably while trying to recover from a former error).
349 * Just give up.
350 */
351 rq->cmd_flags |= REQ_FAILED;
352 cdrom_end_request(drive, 0);
353 ide_error(drive, "request sense failure", stat);
354 return 1;
355
356 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
357 /* All other functions, except for READ. */
358
359 /*
360 * if we have an error, pass back CHECK_CONDITION as the
361 * scsi status byte
362 */
363 if (blk_pc_request(rq) && !rq->errors)
364 rq->errors = SAM_STAT_CHECK_CONDITION;
365
366 /* check for tray open */
367 if (sense_key == NOT_READY) {
368 cdrom_saw_media_change(drive);
369 } else if (sense_key == UNIT_ATTENTION) {
370 /* check for media change */
371 cdrom_saw_media_change(drive);
372 return 0;
373 } else if (sense_key == ILLEGAL_REQUEST &&
374 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
375 /*
376 * Don't print error message for this condition--
377 * SFF8090i indicates that 5/24/00 is the correct
378 * response to a request to close the tray if the
379 * drive doesn't have that capability.
380 * cdrom_log_sense() knows this!
381 */
382 } else if (!(rq->cmd_flags & REQ_QUIET)) {
383 /* otherwise, print an error */
384 ide_dump_status(drive, "packet command error", stat);
385 }
386
387 rq->cmd_flags |= REQ_FAILED;
388
389 /*
390 * instead of playing games with moving completions around,
391 * remove failed request completely and end it when the
392 * request sense has completed
393 */
394 goto end_request;
395
396 } else if (blk_fs_request(rq)) {
397 int do_end_request = 0;
398
399 /* handle errors from READ and WRITE requests */
400
401 if (blk_noretry_request(rq))
402 do_end_request = 1;
403
404 if (sense_key == NOT_READY) {
405 /* tray open */
406 if (rq_data_dir(rq) == READ) {
407 cdrom_saw_media_change(drive);
408
409 /* fail the request */
410 printk(KERN_ERR PFX "%s: tray open\n",
411 drive->name);
412 do_end_request = 1;
413 } else {
414 struct cdrom_info *info = drive->driver_data;
415
416 /*
417 * Allow the drive 5 seconds to recover, some
418 * devices will return this error while flushing
419 * data from cache.
420 */
421 if (!rq->errors)
422 info->write_timeout = jiffies +
423 ATAPI_WAIT_WRITE_BUSY;
424 rq->errors = 1;
425 if (time_after(jiffies, info->write_timeout))
426 do_end_request = 1;
427 else {
428 struct request_queue *q = drive->queue;
429 unsigned long flags;
430
431 /*
432 * take a breather relying on the unplug
433 * timer to kick us again
434 */
435 spin_lock_irqsave(q->queue_lock, flags);
436 blk_plug_device(q);
437 spin_unlock_irqrestore(q->queue_lock, flags);
438
439 return 1;
440 }
441 }
442 } else if (sense_key == UNIT_ATTENTION) {
443 /* media change */
444 cdrom_saw_media_change(drive);
445
446 /*
447 * Arrange to retry the request but be sure to give up
448 * if we've retried too many times.
449 */
450 if (++rq->errors > ERROR_MAX)
451 do_end_request = 1;
452 } else if (sense_key == ILLEGAL_REQUEST ||
453 sense_key == DATA_PROTECT) {
454 /*
455 * No point in retrying after an illegal request or data
456 * protect error.
457 */
458 ide_dump_status_no_sense(drive, "command error", stat);
459 do_end_request = 1;
460 } else if (sense_key == MEDIUM_ERROR) {
461 /*
462 * No point in re-trying a zillion times on a bad
463 * sector. If we got here the error is not correctable.
464 */
465 ide_dump_status_no_sense(drive,
466 "media error (bad sector)",
467 stat);
468 do_end_request = 1;
469 } else if (sense_key == BLANK_CHECK) {
470 /* disk appears blank ?? */
471 ide_dump_status_no_sense(drive, "media error (blank)",
472 stat);
473 do_end_request = 1;
474 } else if ((err & ~ATA_ABORTED) != 0) {
475 /* go to the default handler for other errors */
476 ide_error(drive, "cdrom_decode_status", stat);
477 return 1;
478 } else if ((++rq->errors > ERROR_MAX)) {
479 /* we've racked up too many retries, abort */
480 do_end_request = 1;
481 }
482
483 /*
484 * End a request through request sense analysis when we have
485 * sense data. We need this in order to perform end of media
486 * processing.
487 */
488 if (do_end_request)
489 goto end_request;
490
491 /*
492 * If we got a CHECK_CONDITION status, queue
493 * a request sense command.
494 */
495 if (stat & ATA_ERR)
496 cdrom_queue_request_sense(drive, NULL, NULL);
497 } else {
498 blk_dump_rq_flags(rq, PFX "bad rq");
499 cdrom_end_request(drive, 0);
500 }
501
502 /* retry, or handle the next request */
503 return 1;
504
505 end_request:
506 if (stat & ATA_ERR) {
507 struct request_queue *q = drive->queue;
508 unsigned long flags;
509
510 spin_lock_irqsave(q->queue_lock, flags);
511 blkdev_dequeue_request(rq);
512 spin_unlock_irqrestore(q->queue_lock, flags);
513
514 hwif->rq = NULL;
515
516 cdrom_queue_request_sense(drive, rq->sense, rq);
517 } else
518 cdrom_end_request(drive, 0);
519
520 return 1;
521 }
522
523 /*
524 * Check the contents of the interrupt reason register from the cdrom
525 * and attempt to recover if there are problems. Returns 0 if everything's
526 * ok; nonzero if the request has been terminated.
527 */
528 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
529 int len, int ireason, int rw)
530 {
531 ide_hwif_t *hwif = drive->hwif;
532
533 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
534 __func__, ireason, rw);
535
536 /*
537 * ireason == 0: the drive wants to receive data from us
538 * ireason == 2: the drive is expecting to transfer data to us
539 */
540 if (ireason == (!rw << 1))
541 return 0;
542 else if (ireason == (rw << 1)) {
543
544 /* whoops... */
545 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
546 drive->name, __func__);
547
548 ide_pad_transfer(drive, rw, len);
549 } else if (rw == 0 && ireason == 1) {
550 /*
551 * Some drives (ASUS) seem to tell us that status info is
552 * available. Just get it and ignore.
553 */
554 (void)hwif->tp_ops->read_status(hwif);
555 return 0;
556 } else {
557 /* drive wants a command packet, or invalid ireason... */
558 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
559 drive->name, __func__, ireason);
560 }
561
562 if (rq->cmd_type == REQ_TYPE_ATA_PC)
563 rq->cmd_flags |= REQ_FAILED;
564
565 cdrom_end_request(drive, 0);
566 return -1;
567 }
568
569 /*
570 * Assume that the drive will always provide data in multiples of at least
571 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
572 */
573 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
574 {
575 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
576
577 if ((len % SECTOR_SIZE) == 0)
578 return 0;
579
580 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
581 __func__, len);
582
583 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
584 printk(KERN_ERR PFX "This drive is not supported by this "
585 "version of the driver\n");
586 else {
587 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
588 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
589 }
590
591 return 1;
592 }
593
594 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
595 struct request *rq)
596 {
597 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
598 rq->cmd_flags);
599
600 if (rq_data_dir(rq) == READ) {
601 unsigned short sectors_per_frame =
602 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
603 int nskip = rq->sector & (sectors_per_frame - 1);
604
605 /*
606 * If the requested sector doesn't start on a frame boundary,
607 * we must adjust the start of the transfer so that it does,
608 * and remember to skip the first few sectors.
609 *
610 * If the rq->current_nr_sectors field is larger than the size
611 * of the buffer, it will mean that we're to skip a number of
612 * sectors equal to the amount by which rq->current_nr_sectors
613 * is larger than the buffer size.
614 */
615 if (nskip > 0) {
616 /* sanity check... */
617 if (rq->current_nr_sectors !=
618 bio_cur_sectors(rq->bio)) {
619 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
620 drive->name, __func__,
621 rq->current_nr_sectors);
622 cdrom_end_request(drive, 0);
623 return ide_stopped;
624 }
625 rq->current_nr_sectors += nskip;
626 }
627 }
628
629 /* set up the command */
630 rq->timeout = ATAPI_WAIT_PC;
631
632 return ide_started;
633 }
634
635 /*
636 * Fix up a possibly partially-processed request so that we can start it over
637 * entirely, or even put it back on the request queue.
638 */
639 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
640 {
641
642 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
643
644 if (rq->buffer != bio_data(rq->bio)) {
645 sector_t n =
646 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
647
648 rq->buffer = bio_data(rq->bio);
649 rq->nr_sectors += n;
650 rq->sector -= n;
651 }
652 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
653 rq->hard_cur_sectors = rq->current_nr_sectors;
654 rq->hard_nr_sectors = rq->nr_sectors;
655 rq->hard_sector = rq->sector;
656 rq->q->prep_rq_fn(rq->q, rq);
657 }
658
659 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
660 {
661 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
662 __func__, rq->cmd[0]);
663
664 /*
665 * Some of the trailing request sense fields are optional,
666 * and some drives don't send them. Sigh.
667 */
668 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
669 rq->data_len > 0 && rq->data_len <= 5)
670 while (rq->data_len > 0) {
671 *(u8 *)rq->data++ = 0;
672 --rq->data_len;
673 }
674 }
675
676 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
677 int write, void *buffer, unsigned *bufflen,
678 struct request_sense *sense, int timeout,
679 unsigned int cmd_flags)
680 {
681 struct cdrom_info *info = drive->driver_data;
682 struct request_sense local_sense;
683 int retries = 10;
684 unsigned int flags = 0;
685
686 if (!sense)
687 sense = &local_sense;
688
689 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
690 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
691 timeout, cmd_flags);
692
693 /* start of retry loop */
694 do {
695 struct request *rq;
696 int error;
697
698 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
699
700 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
701 rq->cmd_type = REQ_TYPE_ATA_PC;
702 rq->sense = sense;
703 rq->cmd_flags |= cmd_flags;
704 rq->timeout = timeout;
705 if (buffer) {
706 rq->data = buffer;
707 rq->data_len = *bufflen;
708 }
709
710 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
711
712 if (buffer)
713 *bufflen = rq->data_len;
714
715 flags = rq->cmd_flags;
716 blk_put_request(rq);
717
718 /*
719 * FIXME: we should probably abort/retry or something in case of
720 * failure.
721 */
722 if (flags & REQ_FAILED) {
723 /*
724 * The request failed. Retry if it was due to a unit
725 * attention status (usually means media was changed).
726 */
727 struct request_sense *reqbuf = sense;
728
729 if (reqbuf->sense_key == UNIT_ATTENTION)
730 cdrom_saw_media_change(drive);
731 else if (reqbuf->sense_key == NOT_READY &&
732 reqbuf->asc == 4 && reqbuf->ascq != 4) {
733 /*
734 * The drive is in the process of loading
735 * a disk. Retry, but wait a little to give
736 * the drive time to complete the load.
737 */
738 ssleep(2);
739 } else {
740 /* otherwise, don't retry */
741 retries = 0;
742 }
743 --retries;
744 }
745
746 /* end of retry loop */
747 } while ((flags & REQ_FAILED) && retries >= 0);
748
749 /* return an error if the command failed */
750 return (flags & REQ_FAILED) ? -EIO : 0;
751 }
752
753 /*
754 * Called from blk_end_request_callback() after the data of the request is
755 * completed and before the request itself is completed. By returning value '1',
756 * blk_end_request_callback() returns immediately without completing it.
757 */
758 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
759 {
760 return 1;
761 }
762
763 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
764 {
765 ide_hwif_t *hwif = drive->hwif;
766 struct request *rq = hwif->rq;
767 xfer_func_t *xferfunc;
768 ide_expiry_t *expiry = NULL;
769 int dma_error = 0, dma, stat, thislen, uptodate = 0;
770 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
771 unsigned int timeout;
772 u16 len;
773 u8 ireason;
774
775 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
776 __func__, rq->cmd[0], write);
777
778 /* check for errors */
779 dma = drive->dma;
780 if (dma) {
781 drive->dma = 0;
782 dma_error = hwif->dma_ops->dma_end(drive);
783 if (dma_error) {
784 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
785 write ? "write" : "read");
786 ide_dma_off(drive);
787 }
788 }
789
790 if (cdrom_decode_status(drive, 0, &stat))
791 return ide_stopped;
792
793 /* using dma, transfer is complete now */
794 if (dma) {
795 if (dma_error)
796 return ide_error(drive, "dma error", stat);
797 if (blk_fs_request(rq)) {
798 ide_end_request(drive, 1, rq->nr_sectors);
799 return ide_stopped;
800 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
801 ide_end_request(drive, 1, 1);
802 return ide_stopped;
803 }
804 goto end_request;
805 }
806
807 ide_read_bcount_and_ireason(drive, &len, &ireason);
808
809 thislen = blk_fs_request(rq) ? len : rq->data_len;
810 if (thislen > len)
811 thislen = len;
812
813 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
814 __func__, stat, thislen);
815
816 /* If DRQ is clear, the command has completed. */
817 if ((stat & ATA_DRQ) == 0) {
818 if (blk_fs_request(rq)) {
819 /*
820 * If we're not done reading/writing, complain.
821 * Otherwise, complete the command normally.
822 */
823 uptodate = 1;
824 if (rq->current_nr_sectors > 0) {
825 printk(KERN_ERR PFX "%s: %s: data underrun "
826 "(%d blocks)\n",
827 drive->name, __func__,
828 rq->current_nr_sectors);
829 if (!write)
830 rq->cmd_flags |= REQ_FAILED;
831 uptodate = 0;
832 }
833 cdrom_end_request(drive, uptodate);
834 return ide_stopped;
835 } else if (!blk_pc_request(rq)) {
836 ide_cd_request_sense_fixup(drive, rq);
837 /* complain if we still have data left to transfer */
838 uptodate = rq->data_len ? 0 : 1;
839 }
840 goto end_request;
841 }
842
843 /* check which way to transfer data */
844 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
845 return ide_stopped;
846
847 if (blk_fs_request(rq)) {
848 if (write == 0) {
849 int nskip;
850
851 if (ide_cd_check_transfer_size(drive, len)) {
852 cdrom_end_request(drive, 0);
853 return ide_stopped;
854 }
855
856 /*
857 * First, figure out if we need to bit-bucket
858 * any of the leading sectors.
859 */
860 nskip = min_t(int, rq->current_nr_sectors
861 - bio_cur_sectors(rq->bio),
862 thislen >> 9);
863 if (nskip > 0) {
864 ide_pad_transfer(drive, write, nskip << 9);
865 rq->current_nr_sectors -= nskip;
866 thislen -= (nskip << 9);
867 }
868 }
869 }
870
871 if (ireason == 0) {
872 write = 1;
873 xferfunc = hwif->tp_ops->output_data;
874 } else {
875 write = 0;
876 xferfunc = hwif->tp_ops->input_data;
877 }
878
879 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
880 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
881
882 /* transfer data */
883 while (thislen > 0) {
884 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
885 int blen = rq->data_len;
886
887 /* bio backed? */
888 if (rq->bio) {
889 if (blk_fs_request(rq)) {
890 ptr = rq->buffer;
891 blen = rq->current_nr_sectors << 9;
892 } else {
893 ptr = bio_data(rq->bio);
894 blen = bio_iovec(rq->bio)->bv_len;
895 }
896 }
897
898 if (!ptr) {
899 if (blk_fs_request(rq) && !write)
900 /*
901 * If the buffers are full, pipe the rest into
902 * oblivion.
903 */
904 ide_pad_transfer(drive, 0, thislen);
905 else {
906 printk(KERN_ERR PFX "%s: confused, missing data\n",
907 drive->name);
908 blk_dump_rq_flags(rq, rq_data_dir(rq)
909 ? "cdrom_newpc_intr, write"
910 : "cdrom_newpc_intr, read");
911 }
912 break;
913 }
914
915 if (blen > thislen)
916 blen = thislen;
917
918 xferfunc(drive, NULL, ptr, blen);
919
920 thislen -= blen;
921 len -= blen;
922
923 if (blk_fs_request(rq)) {
924 rq->buffer += blen;
925 rq->nr_sectors -= (blen >> 9);
926 rq->current_nr_sectors -= (blen >> 9);
927 rq->sector += (blen >> 9);
928
929 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
930 cdrom_end_request(drive, 1);
931 } else {
932 rq->data_len -= blen;
933
934 /*
935 * The request can't be completed until DRQ is cleared.
936 * So complete the data, but don't complete the request
937 * using the dummy function for the callback feature
938 * of blk_end_request_callback().
939 */
940 if (rq->bio)
941 blk_end_request_callback(rq, 0, blen,
942 cdrom_newpc_intr_dummy_cb);
943 else
944 rq->data += blen;
945 }
946 if (!write && blk_sense_request(rq))
947 rq->sense_len += blen;
948 }
949
950 /* pad, if necessary */
951 if (!blk_fs_request(rq) && len > 0)
952 ide_pad_transfer(drive, write, len);
953
954 if (blk_pc_request(rq)) {
955 timeout = rq->timeout;
956 } else {
957 timeout = ATAPI_WAIT_PC;
958 if (!blk_fs_request(rq))
959 expiry = ide_cd_expiry;
960 }
961
962 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
963 return ide_started;
964
965 end_request:
966 if (blk_pc_request(rq)) {
967 unsigned int dlen = rq->data_len;
968
969 if (dma)
970 rq->data_len = 0;
971
972 if (blk_end_request(rq, 0, dlen))
973 BUG();
974
975 hwif->rq = NULL;
976 } else {
977 if (!uptodate)
978 rq->cmd_flags |= REQ_FAILED;
979 cdrom_end_request(drive, uptodate);
980 }
981 return ide_stopped;
982 }
983
984 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
985 {
986 struct cdrom_info *cd = drive->driver_data;
987 int write = rq_data_dir(rq) == WRITE;
988 unsigned short sectors_per_frame =
989 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
990
991 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
992 "secs_per_frame: %u\n",
993 __func__, rq->cmd[0], write, sectors_per_frame);
994
995 if (write) {
996 /* disk has become write protected */
997 if (get_disk_ro(cd->disk)) {
998 cdrom_end_request(drive, 0);
999 return ide_stopped;
1000 }
1001 } else {
1002 /*
1003 * We may be retrying this request after an error. Fix up any
1004 * weirdness which might be present in the request packet.
1005 */
1006 ide_cd_restore_request(drive, rq);
1007 }
1008
1009 /* use DMA, if possible / writes *must* be hardware frame aligned */
1010 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1011 (rq->sector & (sectors_per_frame - 1))) {
1012 if (write) {
1013 cdrom_end_request(drive, 0);
1014 return ide_stopped;
1015 }
1016 drive->dma = 0;
1017 } else
1018 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1019
1020 if (write)
1021 cd->devinfo.media_written = 1;
1022
1023 return ide_started;
1024 }
1025
1026 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1027 {
1028
1029 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1030 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1031 rq->cmd_type);
1032
1033 if (blk_pc_request(rq))
1034 rq->cmd_flags |= REQ_QUIET;
1035 else
1036 rq->cmd_flags &= ~REQ_FAILED;
1037
1038 drive->dma = 0;
1039
1040 /* sg request */
1041 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1042 struct request_queue *q = drive->queue;
1043 unsigned int alignment;
1044 char *buf;
1045
1046 if (rq->bio)
1047 buf = bio_data(rq->bio);
1048 else
1049 buf = rq->data;
1050
1051 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1052
1053 /*
1054 * check if dma is safe
1055 *
1056 * NOTE! The "len" and "addr" checks should possibly have
1057 * separate masks.
1058 */
1059 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1060 if ((unsigned long)buf & alignment
1061 || rq->data_len & q->dma_pad_mask
1062 || object_is_on_stack(buf))
1063 drive->dma = 0;
1064 }
1065 }
1066
1067 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1068 sector_t block)
1069 {
1070 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1071 "rq->cmd_type: 0x%x, block: %llu\n",
1072 __func__, rq->cmd[0], rq->cmd_type,
1073 (unsigned long long)block);
1074
1075 if (blk_fs_request(rq)) {
1076 if (cdrom_start_rw(drive, rq) == ide_stopped)
1077 return ide_stopped;
1078
1079 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1080 return ide_stopped;
1081 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1082 rq->cmd_type == REQ_TYPE_ATA_PC) {
1083 if (!rq->timeout)
1084 rq->timeout = ATAPI_WAIT_PC;
1085
1086 cdrom_do_block_pc(drive, rq);
1087 } else if (blk_special_request(rq)) {
1088 /* right now this can only be a reset... */
1089 cdrom_end_request(drive, 1);
1090 return ide_stopped;
1091 } else {
1092 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1093 cdrom_end_request(drive, 0);
1094 return ide_stopped;
1095 }
1096
1097 return ide_issue_pc(drive);
1098 }
1099
1100 /*
1101 * Ioctl handling.
1102 *
1103 * Routines which queue packet commands take as a final argument a pointer to a
1104 * request_sense struct. If execution of the command results in an error with a
1105 * CHECK CONDITION status, this structure will be filled with the results of the
1106 * subsequent request sense command. The pointer can also be NULL, in which case
1107 * no sense information is returned.
1108 */
1109 static void msf_from_bcd(struct atapi_msf *msf)
1110 {
1111 msf->minute = bcd2bin(msf->minute);
1112 msf->second = bcd2bin(msf->second);
1113 msf->frame = bcd2bin(msf->frame);
1114 }
1115
1116 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1117 {
1118 struct cdrom_info *info = drive->driver_data;
1119 struct cdrom_device_info *cdi = &info->devinfo;
1120 unsigned char cmd[BLK_MAX_CDB];
1121
1122 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1123
1124 memset(cmd, 0, BLK_MAX_CDB);
1125 cmd[0] = GPCMD_TEST_UNIT_READY;
1126
1127 /*
1128 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1129 * instead of supporting the LOAD_UNLOAD opcode.
1130 */
1131 cmd[7] = cdi->sanyo_slot % 3;
1132
1133 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1134 }
1135
1136 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1137 unsigned long *sectors_per_frame,
1138 struct request_sense *sense)
1139 {
1140 struct {
1141 __be32 lba;
1142 __be32 blocklen;
1143 } capbuf;
1144
1145 int stat;
1146 unsigned char cmd[BLK_MAX_CDB];
1147 unsigned len = sizeof(capbuf);
1148 u32 blocklen;
1149
1150 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1151
1152 memset(cmd, 0, BLK_MAX_CDB);
1153 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1154
1155 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1156 REQ_QUIET);
1157 if (stat)
1158 return stat;
1159
1160 /*
1161 * Sanity check the given block size
1162 */
1163 blocklen = be32_to_cpu(capbuf.blocklen);
1164 switch (blocklen) {
1165 case 512:
1166 case 1024:
1167 case 2048:
1168 case 4096:
1169 break;
1170 default:
1171 printk(KERN_ERR PFX "%s: weird block size %u\n",
1172 drive->name, blocklen);
1173 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1174 drive->name);
1175 blocklen = 2048;
1176 break;
1177 }
1178
1179 *capacity = 1 + be32_to_cpu(capbuf.lba);
1180 *sectors_per_frame = blocklen >> SECTOR_BITS;
1181
1182 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1183 __func__, *capacity, *sectors_per_frame);
1184
1185 return 0;
1186 }
1187
1188 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1189 int format, char *buf, int buflen,
1190 struct request_sense *sense)
1191 {
1192 unsigned char cmd[BLK_MAX_CDB];
1193
1194 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1195
1196 memset(cmd, 0, BLK_MAX_CDB);
1197
1198 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1199 cmd[6] = trackno;
1200 cmd[7] = (buflen >> 8);
1201 cmd[8] = (buflen & 0xff);
1202 cmd[9] = (format << 6);
1203
1204 if (msf_flag)
1205 cmd[1] = 2;
1206
1207 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1208 }
1209
1210 /* Try to read the entire TOC for the disk into our internal buffer. */
1211 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1212 {
1213 int stat, ntracks, i;
1214 struct cdrom_info *info = drive->driver_data;
1215 struct cdrom_device_info *cdi = &info->devinfo;
1216 struct atapi_toc *toc = info->toc;
1217 struct {
1218 struct atapi_toc_header hdr;
1219 struct atapi_toc_entry ent;
1220 } ms_tmp;
1221 long last_written;
1222 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1223
1224 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1225
1226 if (toc == NULL) {
1227 /* try to allocate space */
1228 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1229 if (toc == NULL) {
1230 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1231 drive->name);
1232 return -ENOMEM;
1233 }
1234 info->toc = toc;
1235 }
1236
1237 /*
1238 * Check to see if the existing data is still valid. If it is,
1239 * just return.
1240 */
1241 (void) cdrom_check_status(drive, sense);
1242
1243 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1244 return 0;
1245
1246 /* try to get the total cdrom capacity and sector size */
1247 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1248 sense);
1249 if (stat)
1250 toc->capacity = 0x1fffff;
1251
1252 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1253 /* save a private copy of the TOC capacity for error handling */
1254 drive->probed_capacity = toc->capacity * sectors_per_frame;
1255
1256 blk_queue_hardsect_size(drive->queue,
1257 sectors_per_frame << SECTOR_BITS);
1258
1259 /* first read just the header, so we know how long the TOC is */
1260 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1261 sizeof(struct atapi_toc_header), sense);
1262 if (stat)
1263 return stat;
1264
1265 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1266 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1267 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1268 }
1269
1270 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1271 if (ntracks <= 0)
1272 return -EIO;
1273 if (ntracks > MAX_TRACKS)
1274 ntracks = MAX_TRACKS;
1275
1276 /* now read the whole schmeer */
1277 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1278 (char *)&toc->hdr,
1279 sizeof(struct atapi_toc_header) +
1280 (ntracks + 1) *
1281 sizeof(struct atapi_toc_entry), sense);
1282
1283 if (stat && toc->hdr.first_track > 1) {
1284 /*
1285 * Cds with CDI tracks only don't have any TOC entries, despite
1286 * of this the returned values are
1287 * first_track == last_track = number of CDI tracks + 1,
1288 * so that this case is indistinguishable from the same layout
1289 * plus an additional audio track. If we get an error for the
1290 * regular case, we assume a CDI without additional audio
1291 * tracks. In this case the readable TOC is empty (CDI tracks
1292 * are not included) and only holds the Leadout entry.
1293 *
1294 * Heiko Eißfeldt.
1295 */
1296 ntracks = 0;
1297 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1298 (char *)&toc->hdr,
1299 sizeof(struct atapi_toc_header) +
1300 (ntracks + 1) *
1301 sizeof(struct atapi_toc_entry),
1302 sense);
1303 if (stat)
1304 return stat;
1305
1306 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1307 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1308 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1309 } else {
1310 toc->hdr.first_track = CDROM_LEADOUT;
1311 toc->hdr.last_track = CDROM_LEADOUT;
1312 }
1313 }
1314
1315 if (stat)
1316 return stat;
1317
1318 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1319
1320 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1321 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1322 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1323 }
1324
1325 for (i = 0; i <= ntracks; i++) {
1326 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1327 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1328 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1329 msf_from_bcd(&toc->ent[i].addr.msf);
1330 }
1331 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1332 toc->ent[i].addr.msf.second,
1333 toc->ent[i].addr.msf.frame);
1334 }
1335
1336 if (toc->hdr.first_track != CDROM_LEADOUT) {
1337 /* read the multisession information */
1338 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1339 sizeof(ms_tmp), sense);
1340 if (stat)
1341 return stat;
1342
1343 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1344 } else {
1345 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1346 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1347 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1348 }
1349
1350 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1351 /* re-read multisession information using MSF format */
1352 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1353 sizeof(ms_tmp), sense);
1354 if (stat)
1355 return stat;
1356
1357 msf_from_bcd(&ms_tmp.ent.addr.msf);
1358 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1359 ms_tmp.ent.addr.msf.second,
1360 ms_tmp.ent.addr.msf.frame);
1361 }
1362
1363 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1364
1365 /* now try to get the total cdrom capacity */
1366 stat = cdrom_get_last_written(cdi, &last_written);
1367 if (!stat && (last_written > toc->capacity)) {
1368 toc->capacity = last_written;
1369 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1370 drive->probed_capacity = toc->capacity * sectors_per_frame;
1371 }
1372
1373 /* Remember that we've read this stuff. */
1374 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1375
1376 return 0;
1377 }
1378
1379 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1380 {
1381 struct cdrom_info *info = drive->driver_data;
1382 struct cdrom_device_info *cdi = &info->devinfo;
1383 struct packet_command cgc;
1384 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1385
1386 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1387
1388 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1389 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1390
1391 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1392 do {
1393 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1394 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1395 if (!stat)
1396 break;
1397 } while (--attempts);
1398 return stat;
1399 }
1400
1401 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1402 {
1403 struct cdrom_info *cd = drive->driver_data;
1404 u16 curspeed, maxspeed;
1405
1406 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1407
1408 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1409 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1410 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1411 } else {
1412 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1413 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1414 }
1415
1416 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1417 __func__, curspeed, maxspeed);
1418
1419 cd->current_speed = (curspeed + (176/2)) / 176;
1420 cd->max_speed = (maxspeed + (176/2)) / 176;
1421 }
1422
1423 #define IDE_CD_CAPABILITIES \
1424 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1425 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1426 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1427 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1428 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1429
1430 static struct cdrom_device_ops ide_cdrom_dops = {
1431 .open = ide_cdrom_open_real,
1432 .release = ide_cdrom_release_real,
1433 .drive_status = ide_cdrom_drive_status,
1434 .media_changed = ide_cdrom_check_media_change_real,
1435 .tray_move = ide_cdrom_tray_move,
1436 .lock_door = ide_cdrom_lock_door,
1437 .select_speed = ide_cdrom_select_speed,
1438 .get_last_session = ide_cdrom_get_last_session,
1439 .get_mcn = ide_cdrom_get_mcn,
1440 .reset = ide_cdrom_reset,
1441 .audio_ioctl = ide_cdrom_audio_ioctl,
1442 .capability = IDE_CD_CAPABILITIES,
1443 .generic_packet = ide_cdrom_packet,
1444 };
1445
1446 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1447 {
1448 struct cdrom_info *info = drive->driver_data;
1449 struct cdrom_device_info *devinfo = &info->devinfo;
1450
1451 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1452
1453 devinfo->ops = &ide_cdrom_dops;
1454 devinfo->speed = info->current_speed;
1455 devinfo->capacity = nslots;
1456 devinfo->handle = drive;
1457 strcpy(devinfo->name, drive->name);
1458
1459 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1460 devinfo->mask |= CDC_SELECT_SPEED;
1461
1462 devinfo->disk = info->disk;
1463 return register_cdrom(devinfo);
1464 }
1465
1466 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1467 {
1468 struct cdrom_info *cd = drive->driver_data;
1469 struct cdrom_device_info *cdi = &cd->devinfo;
1470 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1471 mechtype_t mechtype;
1472 int nslots = 1;
1473
1474 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1475 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1476 drive->atapi_flags);
1477
1478 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1479 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1480 CDC_MO_DRIVE | CDC_RAM);
1481
1482 if (drive->media == ide_optical) {
1483 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1484 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1485 drive->name);
1486 return nslots;
1487 }
1488
1489 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1490 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1491 cdi->mask &= ~CDC_PLAY_AUDIO;
1492 return nslots;
1493 }
1494
1495 /*
1496 * We have to cheat a little here. the packet will eventually be queued
1497 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1498 * Since this device hasn't been registered with the Uniform layer yet,
1499 * it can't do this. Same goes for cdi->ops.
1500 */
1501 cdi->handle = drive;
1502 cdi->ops = &ide_cdrom_dops;
1503
1504 if (ide_cdrom_get_capabilities(drive, buf))
1505 return 0;
1506
1507 if ((buf[8 + 6] & 0x01) == 0)
1508 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1509 if (buf[8 + 6] & 0x08)
1510 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1511 if (buf[8 + 3] & 0x01)
1512 cdi->mask &= ~CDC_CD_R;
1513 if (buf[8 + 3] & 0x02)
1514 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1515 if (buf[8 + 2] & 0x38)
1516 cdi->mask &= ~CDC_DVD;
1517 if (buf[8 + 3] & 0x20)
1518 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1519 if (buf[8 + 3] & 0x10)
1520 cdi->mask &= ~CDC_DVD_R;
1521 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1522 cdi->mask &= ~CDC_PLAY_AUDIO;
1523
1524 mechtype = buf[8 + 6] >> 5;
1525 if (mechtype == mechtype_caddy ||
1526 mechtype == mechtype_popup ||
1527 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1528 cdi->mask |= CDC_CLOSE_TRAY;
1529
1530 if (cdi->sanyo_slot > 0) {
1531 cdi->mask &= ~CDC_SELECT_DISC;
1532 nslots = 3;
1533 } else if (mechtype == mechtype_individual_changer ||
1534 mechtype == mechtype_cartridge_changer) {
1535 nslots = cdrom_number_of_slots(cdi);
1536 if (nslots > 1)
1537 cdi->mask &= ~CDC_SELECT_DISC;
1538 }
1539
1540 ide_cdrom_update_speed(drive, buf);
1541
1542 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1543
1544 /* don't print speed if the drive reported 0 */
1545 if (cd->max_speed)
1546 printk(KERN_CONT " %dX", cd->max_speed);
1547
1548 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1549
1550 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1551 printk(KERN_CONT " DVD%s%s",
1552 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1553 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1554
1555 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1556 printk(KERN_CONT " CD%s%s",
1557 (cdi->mask & CDC_CD_R) ? "" : "-R",
1558 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1559
1560 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1561 printk(KERN_CONT " changer w/%d slots", nslots);
1562 else
1563 printk(KERN_CONT " drive");
1564
1565 printk(KERN_CONT ", %dkB Cache\n",
1566 be16_to_cpup((__be16 *)&buf[8 + 12]));
1567
1568 return nslots;
1569 }
1570
1571 /* standard prep_rq_fn that builds 10 byte cmds */
1572 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1573 {
1574 int hard_sect = queue_hardsect_size(q);
1575 long block = (long)rq->hard_sector / (hard_sect >> 9);
1576 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1577
1578 memset(rq->cmd, 0, BLK_MAX_CDB);
1579
1580 if (rq_data_dir(rq) == READ)
1581 rq->cmd[0] = GPCMD_READ_10;
1582 else
1583 rq->cmd[0] = GPCMD_WRITE_10;
1584
1585 /*
1586 * fill in lba
1587 */
1588 rq->cmd[2] = (block >> 24) & 0xff;
1589 rq->cmd[3] = (block >> 16) & 0xff;
1590 rq->cmd[4] = (block >> 8) & 0xff;
1591 rq->cmd[5] = block & 0xff;
1592
1593 /*
1594 * and transfer length
1595 */
1596 rq->cmd[7] = (blocks >> 8) & 0xff;
1597 rq->cmd[8] = blocks & 0xff;
1598 rq->cmd_len = 10;
1599 return BLKPREP_OK;
1600 }
1601
1602 /*
1603 * Most of the SCSI commands are supported directly by ATAPI devices.
1604 * This transform handles the few exceptions.
1605 */
1606 static int ide_cdrom_prep_pc(struct request *rq)
1607 {
1608 u8 *c = rq->cmd;
1609
1610 /* transform 6-byte read/write commands to the 10-byte version */
1611 if (c[0] == READ_6 || c[0] == WRITE_6) {
1612 c[8] = c[4];
1613 c[5] = c[3];
1614 c[4] = c[2];
1615 c[3] = c[1] & 0x1f;
1616 c[2] = 0;
1617 c[1] &= 0xe0;
1618 c[0] += (READ_10 - READ_6);
1619 rq->cmd_len = 10;
1620 return BLKPREP_OK;
1621 }
1622
1623 /*
1624 * it's silly to pretend we understand 6-byte sense commands, just
1625 * reject with ILLEGAL_REQUEST and the caller should take the
1626 * appropriate action
1627 */
1628 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1629 rq->errors = ILLEGAL_REQUEST;
1630 return BLKPREP_KILL;
1631 }
1632
1633 return BLKPREP_OK;
1634 }
1635
1636 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1637 {
1638 if (blk_fs_request(rq))
1639 return ide_cdrom_prep_fs(q, rq);
1640 else if (blk_pc_request(rq))
1641 return ide_cdrom_prep_pc(rq);
1642
1643 return 0;
1644 }
1645
1646 struct cd_list_entry {
1647 const char *id_model;
1648 const char *id_firmware;
1649 unsigned int cd_flags;
1650 };
1651
1652 #ifdef CONFIG_IDE_PROC_FS
1653 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1654 {
1655 unsigned long capacity, sectors_per_frame;
1656
1657 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1658 return 0;
1659
1660 return capacity * sectors_per_frame;
1661 }
1662
1663 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1664 int count, int *eof, void *data)
1665 {
1666 ide_drive_t *drive = data;
1667 int len;
1668
1669 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1670 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1671 }
1672
1673 static ide_proc_entry_t idecd_proc[] = {
1674 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1675 { NULL, 0, NULL, NULL }
1676 };
1677
1678 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1679 {
1680 return idecd_proc;
1681 }
1682
1683 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1684 {
1685 return NULL;
1686 }
1687 #endif
1688
1689 static const struct cd_list_entry ide_cd_quirks_list[] = {
1690 /* Limit transfer size per interrupt. */
1691 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1692 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1693 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1694 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1695 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1696 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1697 IDE_AFLAG_PRE_ATAPI12, },
1698 /* Vertos 300, some versions of this drive like to talk BCD. */
1699 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1700 /* Vertos 600 ESD. */
1701 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1702 /*
1703 * Sanyo 3 CD changer uses a non-standard command for CD changing
1704 * (by default standard ATAPI support for CD changers is used).
1705 */
1706 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1707 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1708 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1709 /* Stingray 8X CD-ROM. */
1710 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1711 /*
1712 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1713 * mode sense page capabilities size, but older drives break.
1714 */
1715 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1716 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1717 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1718 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1719 /*
1720 * Some drives used by Apple don't advertise audio play
1721 * but they do support reading TOC & audio datas.
1722 */
1723 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1724 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1725 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1726 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1727 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1728 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1729 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1730 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1731 { NULL, NULL, 0 }
1732 };
1733
1734 static unsigned int ide_cd_flags(u16 *id)
1735 {
1736 const struct cd_list_entry *cle = ide_cd_quirks_list;
1737
1738 while (cle->id_model) {
1739 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1740 (cle->id_firmware == NULL ||
1741 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1742 return cle->cd_flags;
1743 cle++;
1744 }
1745
1746 return 0;
1747 }
1748
1749 static int ide_cdrom_setup(ide_drive_t *drive)
1750 {
1751 struct cdrom_info *cd = drive->driver_data;
1752 struct cdrom_device_info *cdi = &cd->devinfo;
1753 u16 *id = drive->id;
1754 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1755 int nslots;
1756
1757 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1758
1759 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1760 blk_queue_dma_alignment(drive->queue, 31);
1761 blk_queue_update_dma_pad(drive->queue, 15);
1762 drive->queue->unplug_delay = (1 * HZ) / 1000;
1763 if (!drive->queue->unplug_delay)
1764 drive->queue->unplug_delay = 1;
1765
1766 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1767 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1768
1769 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1770 fw_rev[4] == '1' && fw_rev[6] <= '2')
1771 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1772 IDE_AFLAG_TOCADDR_AS_BCD);
1773 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1774 fw_rev[4] == '1' && fw_rev[6] <= '2')
1775 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1776 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1777 /* 3 => use CD in slot 0 */
1778 cdi->sanyo_slot = 3;
1779
1780 nslots = ide_cdrom_probe_capabilities(drive);
1781
1782 /* set correct block size */
1783 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1784
1785 if (ide_cdrom_register(drive, nslots)) {
1786 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1787 " cdrom driver.\n", drive->name, __func__);
1788 cd->devinfo.handle = NULL;
1789 return 1;
1790 }
1791
1792 ide_proc_register_driver(drive, cd->driver);
1793 return 0;
1794 }
1795
1796 static void ide_cd_remove(ide_drive_t *drive)
1797 {
1798 struct cdrom_info *info = drive->driver_data;
1799
1800 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1801
1802 ide_proc_unregister_driver(drive, info->driver);
1803 device_del(&info->dev);
1804 del_gendisk(info->disk);
1805
1806 mutex_lock(&idecd_ref_mutex);
1807 put_device(&info->dev);
1808 mutex_unlock(&idecd_ref_mutex);
1809 }
1810
1811 static void ide_cd_release(struct device *dev)
1812 {
1813 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1814 struct cdrom_device_info *devinfo = &info->devinfo;
1815 ide_drive_t *drive = info->drive;
1816 struct gendisk *g = info->disk;
1817
1818 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1819
1820 kfree(info->toc);
1821 if (devinfo->handle == drive)
1822 unregister_cdrom(devinfo);
1823 drive->driver_data = NULL;
1824 blk_queue_prep_rq(drive->queue, NULL);
1825 g->private_data = NULL;
1826 put_disk(g);
1827 kfree(info);
1828 }
1829
1830 static int ide_cd_probe(ide_drive_t *);
1831
1832 static struct ide_driver ide_cdrom_driver = {
1833 .gen_driver = {
1834 .owner = THIS_MODULE,
1835 .name = "ide-cdrom",
1836 .bus = &ide_bus_type,
1837 },
1838 .probe = ide_cd_probe,
1839 .remove = ide_cd_remove,
1840 .version = IDECD_VERSION,
1841 .do_request = ide_cd_do_request,
1842 .end_request = ide_end_request,
1843 #ifdef CONFIG_IDE_PROC_FS
1844 .proc_entries = ide_cd_proc_entries,
1845 .proc_devsets = ide_cd_proc_devsets,
1846 #endif
1847 };
1848
1849 static int idecd_open(struct block_device *bdev, fmode_t mode)
1850 {
1851 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1852 int rc = -ENOMEM;
1853
1854 if (!info)
1855 return -ENXIO;
1856
1857 rc = cdrom_open(&info->devinfo, bdev, mode);
1858
1859 if (rc < 0)
1860 ide_cd_put(info);
1861
1862 return rc;
1863 }
1864
1865 static int idecd_release(struct gendisk *disk, fmode_t mode)
1866 {
1867 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1868
1869 cdrom_release(&info->devinfo, mode);
1870
1871 ide_cd_put(info);
1872
1873 return 0;
1874 }
1875
1876 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1877 {
1878 struct packet_command cgc;
1879 char buffer[16];
1880 int stat;
1881 char spindown;
1882
1883 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1884 return -EFAULT;
1885
1886 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1887
1888 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1889 if (stat)
1890 return stat;
1891
1892 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1893 return cdrom_mode_select(cdi, &cgc);
1894 }
1895
1896 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1897 {
1898 struct packet_command cgc;
1899 char buffer[16];
1900 int stat;
1901 char spindown;
1902
1903 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1904
1905 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1906 if (stat)
1907 return stat;
1908
1909 spindown = buffer[11] & 0x0f;
1910 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1911 return -EFAULT;
1912 return 0;
1913 }
1914
1915 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1916 unsigned int cmd, unsigned long arg)
1917 {
1918 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1919 int err;
1920
1921 switch (cmd) {
1922 case CDROMSETSPINDOWN:
1923 return idecd_set_spindown(&info->devinfo, arg);
1924 case CDROMGETSPINDOWN:
1925 return idecd_get_spindown(&info->devinfo, arg);
1926 default:
1927 break;
1928 }
1929
1930 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1931 if (err == -EINVAL)
1932 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1933
1934 return err;
1935 }
1936
1937 static int idecd_media_changed(struct gendisk *disk)
1938 {
1939 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1940 return cdrom_media_changed(&info->devinfo);
1941 }
1942
1943 static int idecd_revalidate_disk(struct gendisk *disk)
1944 {
1945 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1946 struct request_sense sense;
1947
1948 ide_cd_read_toc(info->drive, &sense);
1949
1950 return 0;
1951 }
1952
1953 static struct block_device_operations idecd_ops = {
1954 .owner = THIS_MODULE,
1955 .open = idecd_open,
1956 .release = idecd_release,
1957 .locked_ioctl = idecd_ioctl,
1958 .media_changed = idecd_media_changed,
1959 .revalidate_disk = idecd_revalidate_disk
1960 };
1961
1962 /* module options */
1963 static char *ignore;
1964 module_param(ignore, charp, 0400);
1965
1966 static unsigned long debug_mask;
1967 module_param(debug_mask, ulong, 0644);
1968
1969 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1970
1971 static int ide_cd_probe(ide_drive_t *drive)
1972 {
1973 struct cdrom_info *info;
1974 struct gendisk *g;
1975 struct request_sense sense;
1976
1977 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1978 "drive->media: 0x%x\n", __func__, drive->driver_req,
1979 drive->media);
1980
1981 if (!strstr("ide-cdrom", drive->driver_req))
1982 goto failed;
1983
1984 if (drive->media != ide_cdrom && drive->media != ide_optical)
1985 goto failed;
1986
1987 /* skip drives that we were told to ignore */
1988 if (ignore != NULL) {
1989 if (strstr(ignore, drive->name)) {
1990 printk(KERN_INFO PFX "ignoring drive %s\n",
1991 drive->name);
1992 goto failed;
1993 }
1994 }
1995
1996 drive->debug_mask = debug_mask;
1997 drive->irq_handler = cdrom_newpc_intr;
1998
1999 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2000 if (info == NULL) {
2001 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2002 drive->name);
2003 goto failed;
2004 }
2005
2006 g = alloc_disk(1 << PARTN_BITS);
2007 if (!g)
2008 goto out_free_cd;
2009
2010 ide_init_disk(g, drive);
2011
2012 info->dev.parent = &drive->gendev;
2013 info->dev.release = ide_cd_release;
2014 dev_set_name(&info->dev, dev_name(&drive->gendev));
2015
2016 if (device_register(&info->dev))
2017 goto out_free_disk;
2018
2019 info->drive = drive;
2020 info->driver = &ide_cdrom_driver;
2021 info->disk = g;
2022
2023 g->private_data = &info->driver;
2024
2025 drive->driver_data = info;
2026
2027 g->minors = 1;
2028 g->driverfs_dev = &drive->gendev;
2029 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2030 if (ide_cdrom_setup(drive)) {
2031 put_device(&info->dev);
2032 goto failed;
2033 }
2034
2035 ide_cd_read_toc(drive, &sense);
2036 g->fops = &idecd_ops;
2037 g->flags |= GENHD_FL_REMOVABLE;
2038 add_disk(g);
2039 return 0;
2040
2041 out_free_disk:
2042 put_disk(g);
2043 out_free_cd:
2044 kfree(info);
2045 failed:
2046 return -ENODEV;
2047 }
2048
2049 static void __exit ide_cdrom_exit(void)
2050 {
2051 driver_unregister(&ide_cdrom_driver.gen_driver);
2052 }
2053
2054 static int __init ide_cdrom_init(void)
2055 {
2056 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2057 return driver_register(&ide_cdrom_driver.gen_driver);
2058 }
2059
2060 MODULE_ALIAS("ide:*m-cdrom*");
2061 MODULE_ALIAS("ide-cd");
2062 module_init(ide_cdrom_init);
2063 module_exit(ide_cdrom_exit);
2064 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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