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ide: remove ide_end_request()
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 static DEFINE_MUTEX(idecd_ref_mutex);
57
58 static void ide_cd_release(struct device *);
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 get_device(&cd->dev);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75 }
76
77 static void ide_cd_put(struct cdrom_info *cd)
78 {
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 put_device(&cd->dev);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85 }
86
87 /*
88 * Generic packet command support and error handling routines.
89 */
90
91 /* Mark that we've seen a media change and invalidate our internal buffers. */
92 static void cdrom_saw_media_change(ide_drive_t *drive)
93 {
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96 }
97
98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
99 struct request_sense *sense)
100 {
101 int log = 0;
102
103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
104
105 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
106 return 0;
107
108 switch (sense->sense_key) {
109 case NO_SENSE:
110 case RECOVERED_ERROR:
111 break;
112 case NOT_READY:
113 /*
114 * don't care about tray state messages for e.g. capacity
115 * commands or in-progress or becoming ready
116 */
117 if (sense->asc == 0x3a || sense->asc == 0x04)
118 break;
119 log = 1;
120 break;
121 case ILLEGAL_REQUEST:
122 /*
123 * don't log START_STOP unit with LoEj set, since we cannot
124 * reliably check if drive can auto-close
125 */
126 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
127 break;
128 log = 1;
129 break;
130 case UNIT_ATTENTION:
131 /*
132 * Make good and sure we've seen this potential media change.
133 * Some drives (i.e. Creative) fail to present the correct sense
134 * key in the error register.
135 */
136 cdrom_saw_media_change(drive);
137 break;
138 default:
139 log = 1;
140 break;
141 }
142 return log;
143 }
144
145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
146 struct request *failed_command,
147 struct request_sense *sense)
148 {
149 unsigned long sector;
150 unsigned long bio_sectors;
151 struct cdrom_info *info = drive->driver_data;
152
153 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
154 sense->error_code, sense->sense_key);
155
156 if (failed_command)
157 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
158 failed_command->cmd[0]);
159
160 if (!cdrom_log_sense(drive, failed_command, sense))
161 return;
162
163 /*
164 * If a read toc is executed for a CD-R or CD-RW medium where the first
165 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
166 * confusing error)
167 */
168 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
169 if (sense->sense_key == 0x05 && sense->asc == 0x24)
170 return;
171
172 /* current error */
173 if (sense->error_code == 0x70) {
174 switch (sense->sense_key) {
175 case MEDIUM_ERROR:
176 case VOLUME_OVERFLOW:
177 case ILLEGAL_REQUEST:
178 if (!sense->valid)
179 break;
180 if (failed_command == NULL ||
181 !blk_fs_request(failed_command))
182 break;
183 sector = (sense->information[0] << 24) |
184 (sense->information[1] << 16) |
185 (sense->information[2] << 8) |
186 (sense->information[3]);
187
188 if (drive->queue->hardsect_size == 2048)
189 /* device sector size is 2K */
190 sector <<= 2;
191
192 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
193 sector &= ~(bio_sectors - 1);
194
195 /*
196 * The SCSI specification allows for the value
197 * returned by READ CAPACITY to be up to 75 2K
198 * sectors past the last readable block.
199 * Therefore, if we hit a medium error within the
200 * last 75 2K sectors, we decrease the saved size
201 * value.
202 */
203 if (sector < get_capacity(info->disk) &&
204 drive->probed_capacity - sector < 4 * 75)
205 set_capacity(info->disk, sector);
206 }
207 }
208
209 ide_cd_log_error(drive->name, failed_command, sense);
210 }
211
212 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
213 struct request *failed_command)
214 {
215 struct cdrom_info *info = drive->driver_data;
216 struct request *rq = &drive->request_sense_rq;
217
218 ide_debug_log(IDE_DBG_SENSE, "enter");
219
220 if (sense == NULL)
221 sense = &info->sense_data;
222
223 /* stuff the sense request in front of our current request */
224 blk_rq_init(NULL, rq);
225 rq->cmd_type = REQ_TYPE_ATA_PC;
226 rq->rq_disk = info->disk;
227
228 rq->data = sense;
229 rq->cmd[0] = GPCMD_REQUEST_SENSE;
230 rq->cmd[4] = 18;
231 rq->data_len = 18;
232
233 rq->cmd_type = REQ_TYPE_SENSE;
234 rq->cmd_flags |= REQ_PREEMPT;
235
236 /* NOTE! Save the failed command in "rq->buffer" */
237 rq->buffer = (void *) failed_command;
238
239 if (failed_command)
240 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
241 failed_command->cmd[0]);
242
243 drive->hwif->rq = NULL;
244
245 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
246 }
247
248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
249 {
250 struct request *rq = drive->hwif->rq;
251 int nsectors = rq->hard_cur_sectors;
252
253 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
254 rq->cmd[0], uptodate, nsectors);
255
256 if (blk_sense_request(rq) && uptodate) {
257 /*
258 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
259 * failed request
260 */
261 struct request *failed = (struct request *) rq->buffer;
262 struct cdrom_info *info = drive->driver_data;
263 void *sense = &info->sense_data;
264
265 if (failed) {
266 if (failed->sense) {
267 sense = failed->sense;
268 failed->sense_len = rq->sense_len;
269 }
270 cdrom_analyze_sense_data(drive, failed, sense);
271 /*
272 * now end the failed request
273 */
274 if (blk_fs_request(failed)) {
275 if (ide_end_rq(drive, failed, -EIO,
276 failed->hard_nr_sectors << 9))
277 BUG();
278 } else {
279 if (blk_end_request(failed, -EIO,
280 failed->data_len))
281 BUG();
282 }
283 } else
284 cdrom_analyze_sense_data(drive, NULL, sense);
285 }
286
287 if (!rq->current_nr_sectors && blk_fs_request(rq))
288 uptodate = 1;
289 /* make sure it's fully ended */
290 if (blk_pc_request(rq))
291 nsectors = (rq->data_len + 511) >> 9;
292 if (!nsectors)
293 nsectors = 1;
294
295 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
296 uptodate, nsectors);
297
298 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
299 rq->errors = -EIO;
300
301 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
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, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
342 "rq->cmd_type: 0x%x, err: 0x%x",
343 stat, good_stat, rq->cmd[0], rq->cmd_type,
344 err);
345
346 if (blk_sense_request(rq)) {
347 /*
348 * We got an error trying to get sense info from the drive
349 * (probably while trying to recover from a former error).
350 * Just give up.
351 */
352 rq->cmd_flags |= REQ_FAILED;
353 cdrom_end_request(drive, 0);
354 ide_error(drive, "request sense failure", stat);
355 return 1;
356
357 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
358 /* All other functions, except for READ. */
359
360 /*
361 * if we have an error, pass back CHECK_CONDITION as the
362 * scsi status byte
363 */
364 if (blk_pc_request(rq) && !rq->errors)
365 rq->errors = SAM_STAT_CHECK_CONDITION;
366
367 /* check for tray open */
368 if (sense_key == NOT_READY) {
369 cdrom_saw_media_change(drive);
370 } else if (sense_key == UNIT_ATTENTION) {
371 /* check for media change */
372 cdrom_saw_media_change(drive);
373 return 0;
374 } else if (sense_key == ILLEGAL_REQUEST &&
375 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
376 /*
377 * Don't print error message for this condition--
378 * SFF8090i indicates that 5/24/00 is the correct
379 * response to a request to close the tray if the
380 * drive doesn't have that capability.
381 * cdrom_log_sense() knows this!
382 */
383 } else if (!(rq->cmd_flags & REQ_QUIET)) {
384 /* otherwise, print an error */
385 ide_dump_status(drive, "packet command error", stat);
386 }
387
388 rq->cmd_flags |= REQ_FAILED;
389
390 /*
391 * instead of playing games with moving completions around,
392 * remove failed request completely and end it when the
393 * request sense has completed
394 */
395 goto end_request;
396
397 } else if (blk_fs_request(rq)) {
398 int do_end_request = 0;
399
400 /* handle errors from READ and WRITE requests */
401
402 if (blk_noretry_request(rq))
403 do_end_request = 1;
404
405 if (sense_key == NOT_READY) {
406 /* tray open */
407 if (rq_data_dir(rq) == READ) {
408 cdrom_saw_media_change(drive);
409
410 /* fail the request */
411 printk(KERN_ERR PFX "%s: tray open\n",
412 drive->name);
413 do_end_request = 1;
414 } else {
415 struct cdrom_info *info = drive->driver_data;
416
417 /*
418 * Allow the drive 5 seconds to recover, some
419 * devices will return this error while flushing
420 * data from cache.
421 */
422 if (!rq->errors)
423 info->write_timeout = jiffies +
424 ATAPI_WAIT_WRITE_BUSY;
425 rq->errors = 1;
426 if (time_after(jiffies, info->write_timeout))
427 do_end_request = 1;
428 else {
429 struct request_queue *q = drive->queue;
430 unsigned long flags;
431
432 /*
433 * take a breather relying on the unplug
434 * timer to kick us again
435 */
436 spin_lock_irqsave(q->queue_lock, flags);
437 blk_plug_device(q);
438 spin_unlock_irqrestore(q->queue_lock, flags);
439
440 return 1;
441 }
442 }
443 } else if (sense_key == UNIT_ATTENTION) {
444 /* media change */
445 cdrom_saw_media_change(drive);
446
447 /*
448 * Arrange to retry the request but be sure to give up
449 * if we've retried too many times.
450 */
451 if (++rq->errors > ERROR_MAX)
452 do_end_request = 1;
453 } else if (sense_key == ILLEGAL_REQUEST ||
454 sense_key == DATA_PROTECT) {
455 /*
456 * No point in retrying after an illegal request or data
457 * protect error.
458 */
459 ide_dump_status_no_sense(drive, "command error", stat);
460 do_end_request = 1;
461 } else if (sense_key == MEDIUM_ERROR) {
462 /*
463 * No point in re-trying a zillion times on a bad
464 * sector. If we got here the error is not correctable.
465 */
466 ide_dump_status_no_sense(drive,
467 "media error (bad sector)",
468 stat);
469 do_end_request = 1;
470 } else if (sense_key == BLANK_CHECK) {
471 /* disk appears blank ?? */
472 ide_dump_status_no_sense(drive, "media error (blank)",
473 stat);
474 do_end_request = 1;
475 } else if ((err & ~ATA_ABORTED) != 0) {
476 /* go to the default handler for other errors */
477 ide_error(drive, "cdrom_decode_status", stat);
478 return 1;
479 } else if ((++rq->errors > ERROR_MAX)) {
480 /* we've racked up too many retries, abort */
481 do_end_request = 1;
482 }
483
484 /*
485 * End a request through request sense analysis when we have
486 * sense data. We need this in order to perform end of media
487 * processing.
488 */
489 if (do_end_request)
490 goto end_request;
491
492 /*
493 * If we got a CHECK_CONDITION status, queue
494 * a request sense command.
495 */
496 if (stat & ATA_ERR)
497 cdrom_queue_request_sense(drive, NULL, NULL);
498 } else {
499 blk_dump_rq_flags(rq, PFX "bad rq");
500 cdrom_end_request(drive, 0);
501 }
502
503 /* retry, or handle the next request */
504 return 1;
505
506 end_request:
507 if (stat & ATA_ERR) {
508 struct request_queue *q = drive->queue;
509 unsigned long flags;
510
511 spin_lock_irqsave(q->queue_lock, flags);
512 blkdev_dequeue_request(rq);
513 spin_unlock_irqrestore(q->queue_lock, flags);
514
515 hwif->rq = NULL;
516
517 cdrom_queue_request_sense(drive, rq->sense, rq);
518 } else
519 cdrom_end_request(drive, 0);
520
521 return 1;
522 }
523
524 /*
525 * Check the contents of the interrupt reason register from the cdrom
526 * and attempt to recover if there are problems. Returns 0 if everything's
527 * ok; nonzero if the request has been terminated.
528 */
529 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
530 int len, int ireason, int rw)
531 {
532 ide_hwif_t *hwif = drive->hwif;
533
534 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", 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, "len: %d", 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, "rq->cmd_flags: 0x%x", rq->cmd_flags);
598
599 if (rq_data_dir(rq) == READ) {
600 unsigned short sectors_per_frame =
601 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
602 int nskip = rq->sector & (sectors_per_frame - 1);
603
604 /*
605 * If the requested sector doesn't start on a frame boundary,
606 * we must adjust the start of the transfer so that it does,
607 * and remember to skip the first few sectors.
608 *
609 * If the rq->current_nr_sectors field is larger than the size
610 * of the buffer, it will mean that we're to skip a number of
611 * sectors equal to the amount by which rq->current_nr_sectors
612 * is larger than the buffer size.
613 */
614 if (nskip > 0) {
615 /* sanity check... */
616 if (rq->current_nr_sectors !=
617 bio_cur_sectors(rq->bio)) {
618 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
619 drive->name, __func__,
620 rq->current_nr_sectors);
621 cdrom_end_request(drive, 0);
622 return ide_stopped;
623 }
624 rq->current_nr_sectors += nskip;
625 }
626 }
627
628 /* set up the command */
629 rq->timeout = ATAPI_WAIT_PC;
630
631 return ide_started;
632 }
633
634 /*
635 * Fix up a possibly partially-processed request so that we can start it over
636 * entirely, or even put it back on the request queue.
637 */
638 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
639 {
640
641 ide_debug_log(IDE_DBG_FUNC, "enter");
642
643 if (rq->buffer != bio_data(rq->bio)) {
644 sector_t n =
645 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
646
647 rq->buffer = bio_data(rq->bio);
648 rq->nr_sectors += n;
649 rq->sector -= n;
650 }
651 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
652 rq->hard_cur_sectors = rq->current_nr_sectors;
653 rq->hard_nr_sectors = rq->nr_sectors;
654 rq->hard_sector = rq->sector;
655 rq->q->prep_rq_fn(rq->q, rq);
656 }
657
658 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
659 {
660 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", 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, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
688 "cmd_flags: 0x%x",
689 cmd[0], write, 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, "cmd[0]: 0x%x, write: 0x%x",
774 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_complete_rq(drive, 0, rq->nr_sectors
797 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
798 return ide_stopped;
799 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
800 ide_complete_rq(drive, 0, 512);
801 return ide_stopped;
802 }
803 goto end_request;
804 }
805
806 ide_read_bcount_and_ireason(drive, &len, &ireason);
807
808 thislen = blk_fs_request(rq) ? len : rq->data_len;
809 if (thislen > len)
810 thislen = len;
811
812 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
813 stat, thislen);
814
815 /* If DRQ is clear, the command has completed. */
816 if ((stat & ATA_DRQ) == 0) {
817 if (blk_fs_request(rq)) {
818 /*
819 * If we're not done reading/writing, complain.
820 * Otherwise, complete the command normally.
821 */
822 uptodate = 1;
823 if (rq->current_nr_sectors > 0) {
824 printk(KERN_ERR PFX "%s: %s: data underrun "
825 "(%d blocks)\n",
826 drive->name, __func__,
827 rq->current_nr_sectors);
828 if (!write)
829 rq->cmd_flags |= REQ_FAILED;
830 uptodate = 0;
831 }
832 cdrom_end_request(drive, uptodate);
833 return ide_stopped;
834 } else if (!blk_pc_request(rq)) {
835 ide_cd_request_sense_fixup(drive, rq);
836 /* complain if we still have data left to transfer */
837 uptodate = rq->data_len ? 0 : 1;
838 }
839 goto end_request;
840 }
841
842 /* check which way to transfer data */
843 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
844 return ide_stopped;
845
846 if (blk_fs_request(rq)) {
847 if (write == 0) {
848 int nskip;
849
850 if (ide_cd_check_transfer_size(drive, len)) {
851 cdrom_end_request(drive, 0);
852 return ide_stopped;
853 }
854
855 /*
856 * First, figure out if we need to bit-bucket
857 * any of the leading sectors.
858 */
859 nskip = min_t(int, rq->current_nr_sectors
860 - bio_cur_sectors(rq->bio),
861 thislen >> 9);
862 if (nskip > 0) {
863 ide_pad_transfer(drive, write, nskip << 9);
864 rq->current_nr_sectors -= nskip;
865 thislen -= (nskip << 9);
866 }
867 }
868 }
869
870 if (ireason == 0) {
871 write = 1;
872 xferfunc = hwif->tp_ops->output_data;
873 } else {
874 write = 0;
875 xferfunc = hwif->tp_ops->input_data;
876 }
877
878 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
879 "ireason: 0x%x",
880 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, "rq->cmd[0]: 0x%x, write: 0x%x, "
992 "secs_per_frame: %u",
993 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, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1030 rq->cmd[0], rq->cmd_type);
1031
1032 if (blk_pc_request(rq))
1033 rq->cmd_flags |= REQ_QUIET;
1034 else
1035 rq->cmd_flags &= ~REQ_FAILED;
1036
1037 drive->dma = 0;
1038
1039 /* sg request */
1040 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1041 struct request_queue *q = drive->queue;
1042 unsigned int alignment;
1043 char *buf;
1044
1045 if (rq->bio)
1046 buf = bio_data(rq->bio);
1047 else
1048 buf = rq->data;
1049
1050 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1051
1052 /*
1053 * check if dma is safe
1054 *
1055 * NOTE! The "len" and "addr" checks should possibly have
1056 * separate masks.
1057 */
1058 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1059 if ((unsigned long)buf & alignment
1060 || rq->data_len & q->dma_pad_mask
1061 || object_is_on_stack(buf))
1062 drive->dma = 0;
1063 }
1064 }
1065
1066 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1067 sector_t block)
1068 {
1069 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1070 rq->cmd[0], (unsigned long long)block);
1071
1072 if (drive->debug_mask & IDE_DBG_RQ)
1073 blk_dump_rq_flags(rq, "ide_cd_do_request");
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, "enter");
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, "enter");
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, "cap: %lu, sectors_per_frame: %lu",
1183 *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, "enter");
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, "enter");
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, "enter");
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, "enter");
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, "curspeed: %u, maxspeed: %u",
1417 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, "nslots: %d", 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, "media: 0x%x, atapi_flags: 0x%lx",
1475 drive->media, drive->atapi_flags);
1476
1477 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1478 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1479 CDC_MO_DRIVE | CDC_RAM);
1480
1481 if (drive->media == ide_optical) {
1482 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1483 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1484 drive->name);
1485 return nslots;
1486 }
1487
1488 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1489 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1490 cdi->mask &= ~CDC_PLAY_AUDIO;
1491 return nslots;
1492 }
1493
1494 /*
1495 * We have to cheat a little here. the packet will eventually be queued
1496 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1497 * Since this device hasn't been registered with the Uniform layer yet,
1498 * it can't do this. Same goes for cdi->ops.
1499 */
1500 cdi->handle = drive;
1501 cdi->ops = &ide_cdrom_dops;
1502
1503 if (ide_cdrom_get_capabilities(drive, buf))
1504 return 0;
1505
1506 if ((buf[8 + 6] & 0x01) == 0)
1507 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1508 if (buf[8 + 6] & 0x08)
1509 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1510 if (buf[8 + 3] & 0x01)
1511 cdi->mask &= ~CDC_CD_R;
1512 if (buf[8 + 3] & 0x02)
1513 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1514 if (buf[8 + 2] & 0x38)
1515 cdi->mask &= ~CDC_DVD;
1516 if (buf[8 + 3] & 0x20)
1517 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1518 if (buf[8 + 3] & 0x10)
1519 cdi->mask &= ~CDC_DVD_R;
1520 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1521 cdi->mask &= ~CDC_PLAY_AUDIO;
1522
1523 mechtype = buf[8 + 6] >> 5;
1524 if (mechtype == mechtype_caddy ||
1525 mechtype == mechtype_popup ||
1526 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1527 cdi->mask |= CDC_CLOSE_TRAY;
1528
1529 if (cdi->sanyo_slot > 0) {
1530 cdi->mask &= ~CDC_SELECT_DISC;
1531 nslots = 3;
1532 } else if (mechtype == mechtype_individual_changer ||
1533 mechtype == mechtype_cartridge_changer) {
1534 nslots = cdrom_number_of_slots(cdi);
1535 if (nslots > 1)
1536 cdi->mask &= ~CDC_SELECT_DISC;
1537 }
1538
1539 ide_cdrom_update_speed(drive, buf);
1540
1541 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1542
1543 /* don't print speed if the drive reported 0 */
1544 if (cd->max_speed)
1545 printk(KERN_CONT " %dX", cd->max_speed);
1546
1547 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1548
1549 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1550 printk(KERN_CONT " DVD%s%s",
1551 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1552 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1553
1554 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1555 printk(KERN_CONT " CD%s%s",
1556 (cdi->mask & CDC_CD_R) ? "" : "-R",
1557 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1558
1559 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1560 printk(KERN_CONT " changer w/%d slots", nslots);
1561 else
1562 printk(KERN_CONT " drive");
1563
1564 printk(KERN_CONT ", %dkB Cache\n",
1565 be16_to_cpup((__be16 *)&buf[8 + 12]));
1566
1567 return nslots;
1568 }
1569
1570 /* standard prep_rq_fn that builds 10 byte cmds */
1571 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1572 {
1573 int hard_sect = queue_hardsect_size(q);
1574 long block = (long)rq->hard_sector / (hard_sect >> 9);
1575 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1576
1577 memset(rq->cmd, 0, BLK_MAX_CDB);
1578
1579 if (rq_data_dir(rq) == READ)
1580 rq->cmd[0] = GPCMD_READ_10;
1581 else
1582 rq->cmd[0] = GPCMD_WRITE_10;
1583
1584 /*
1585 * fill in lba
1586 */
1587 rq->cmd[2] = (block >> 24) & 0xff;
1588 rq->cmd[3] = (block >> 16) & 0xff;
1589 rq->cmd[4] = (block >> 8) & 0xff;
1590 rq->cmd[5] = block & 0xff;
1591
1592 /*
1593 * and transfer length
1594 */
1595 rq->cmd[7] = (blocks >> 8) & 0xff;
1596 rq->cmd[8] = blocks & 0xff;
1597 rq->cmd_len = 10;
1598 return BLKPREP_OK;
1599 }
1600
1601 /*
1602 * Most of the SCSI commands are supported directly by ATAPI devices.
1603 * This transform handles the few exceptions.
1604 */
1605 static int ide_cdrom_prep_pc(struct request *rq)
1606 {
1607 u8 *c = rq->cmd;
1608
1609 /* transform 6-byte read/write commands to the 10-byte version */
1610 if (c[0] == READ_6 || c[0] == WRITE_6) {
1611 c[8] = c[4];
1612 c[5] = c[3];
1613 c[4] = c[2];
1614 c[3] = c[1] & 0x1f;
1615 c[2] = 0;
1616 c[1] &= 0xe0;
1617 c[0] += (READ_10 - READ_6);
1618 rq->cmd_len = 10;
1619 return BLKPREP_OK;
1620 }
1621
1622 /*
1623 * it's silly to pretend we understand 6-byte sense commands, just
1624 * reject with ILLEGAL_REQUEST and the caller should take the
1625 * appropriate action
1626 */
1627 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1628 rq->errors = ILLEGAL_REQUEST;
1629 return BLKPREP_KILL;
1630 }
1631
1632 return BLKPREP_OK;
1633 }
1634
1635 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1636 {
1637 if (blk_fs_request(rq))
1638 return ide_cdrom_prep_fs(q, rq);
1639 else if (blk_pc_request(rq))
1640 return ide_cdrom_prep_pc(rq);
1641
1642 return 0;
1643 }
1644
1645 struct cd_list_entry {
1646 const char *id_model;
1647 const char *id_firmware;
1648 unsigned int cd_flags;
1649 };
1650
1651 #ifdef CONFIG_IDE_PROC_FS
1652 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1653 {
1654 unsigned long capacity, sectors_per_frame;
1655
1656 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1657 return 0;
1658
1659 return capacity * sectors_per_frame;
1660 }
1661
1662 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1663 int count, int *eof, void *data)
1664 {
1665 ide_drive_t *drive = data;
1666 int len;
1667
1668 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1669 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1670 }
1671
1672 static ide_proc_entry_t idecd_proc[] = {
1673 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1674 { NULL, 0, NULL, NULL }
1675 };
1676
1677 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1678 {
1679 return idecd_proc;
1680 }
1681
1682 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1683 {
1684 return NULL;
1685 }
1686 #endif
1687
1688 static const struct cd_list_entry ide_cd_quirks_list[] = {
1689 /* Limit transfer size per interrupt. */
1690 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1691 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1692 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1693 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1694 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1695 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1696 IDE_AFLAG_PRE_ATAPI12, },
1697 /* Vertos 300, some versions of this drive like to talk BCD. */
1698 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1699 /* Vertos 600 ESD. */
1700 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1701 /*
1702 * Sanyo 3 CD changer uses a non-standard command for CD changing
1703 * (by default standard ATAPI support for CD changers is used).
1704 */
1705 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1706 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1707 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1708 /* Stingray 8X CD-ROM. */
1709 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1710 /*
1711 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1712 * mode sense page capabilities size, but older drives break.
1713 */
1714 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1715 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1716 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1717 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1718 /*
1719 * Some drives used by Apple don't advertise audio play
1720 * but they do support reading TOC & audio datas.
1721 */
1722 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1723 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1724 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1725 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1726 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1727 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1728 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1729 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1730 { NULL, NULL, 0 }
1731 };
1732
1733 static unsigned int ide_cd_flags(u16 *id)
1734 {
1735 const struct cd_list_entry *cle = ide_cd_quirks_list;
1736
1737 while (cle->id_model) {
1738 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1739 (cle->id_firmware == NULL ||
1740 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1741 return cle->cd_flags;
1742 cle++;
1743 }
1744
1745 return 0;
1746 }
1747
1748 static int ide_cdrom_setup(ide_drive_t *drive)
1749 {
1750 struct cdrom_info *cd = drive->driver_data;
1751 struct cdrom_device_info *cdi = &cd->devinfo;
1752 u16 *id = drive->id;
1753 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1754 int nslots;
1755
1756 ide_debug_log(IDE_DBG_PROBE, "enter");
1757
1758 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1759 blk_queue_dma_alignment(drive->queue, 31);
1760 blk_queue_update_dma_pad(drive->queue, 15);
1761 drive->queue->unplug_delay = (1 * HZ) / 1000;
1762 if (!drive->queue->unplug_delay)
1763 drive->queue->unplug_delay = 1;
1764
1765 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1766 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1767
1768 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1769 fw_rev[4] == '1' && fw_rev[6] <= '2')
1770 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1771 IDE_AFLAG_TOCADDR_AS_BCD);
1772 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1773 fw_rev[4] == '1' && fw_rev[6] <= '2')
1774 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1775 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1776 /* 3 => use CD in slot 0 */
1777 cdi->sanyo_slot = 3;
1778
1779 nslots = ide_cdrom_probe_capabilities(drive);
1780
1781 /* set correct block size */
1782 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1783
1784 if (ide_cdrom_register(drive, nslots)) {
1785 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1786 " cdrom driver.\n", drive->name, __func__);
1787 cd->devinfo.handle = NULL;
1788 return 1;
1789 }
1790
1791 ide_proc_register_driver(drive, cd->driver);
1792 return 0;
1793 }
1794
1795 static void ide_cd_remove(ide_drive_t *drive)
1796 {
1797 struct cdrom_info *info = drive->driver_data;
1798
1799 ide_debug_log(IDE_DBG_FUNC, "enter");
1800
1801 ide_proc_unregister_driver(drive, info->driver);
1802 device_del(&info->dev);
1803 del_gendisk(info->disk);
1804
1805 mutex_lock(&idecd_ref_mutex);
1806 put_device(&info->dev);
1807 mutex_unlock(&idecd_ref_mutex);
1808 }
1809
1810 static void ide_cd_release(struct device *dev)
1811 {
1812 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1813 struct cdrom_device_info *devinfo = &info->devinfo;
1814 ide_drive_t *drive = info->drive;
1815 struct gendisk *g = info->disk;
1816
1817 ide_debug_log(IDE_DBG_FUNC, "enter");
1818
1819 kfree(info->toc);
1820 if (devinfo->handle == drive)
1821 unregister_cdrom(devinfo);
1822 drive->driver_data = NULL;
1823 blk_queue_prep_rq(drive->queue, NULL);
1824 g->private_data = NULL;
1825 put_disk(g);
1826 kfree(info);
1827 }
1828
1829 static int ide_cd_probe(ide_drive_t *);
1830
1831 static struct ide_driver ide_cdrom_driver = {
1832 .gen_driver = {
1833 .owner = THIS_MODULE,
1834 .name = "ide-cdrom",
1835 .bus = &ide_bus_type,
1836 },
1837 .probe = ide_cd_probe,
1838 .remove = ide_cd_remove,
1839 .version = IDECD_VERSION,
1840 .do_request = ide_cd_do_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, "driver_req: %s, media: 0x%x",
1976 drive->driver_req, drive->media);
1977
1978 if (!strstr("ide-cdrom", drive->driver_req))
1979 goto failed;
1980
1981 if (drive->media != ide_cdrom && drive->media != ide_optical)
1982 goto failed;
1983
1984 /* skip drives that we were told to ignore */
1985 if (ignore != NULL) {
1986 if (strstr(ignore, drive->name)) {
1987 printk(KERN_INFO PFX "ignoring drive %s\n",
1988 drive->name);
1989 goto failed;
1990 }
1991 }
1992
1993 drive->debug_mask = debug_mask;
1994 drive->irq_handler = cdrom_newpc_intr;
1995
1996 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1997 if (info == NULL) {
1998 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1999 drive->name);
2000 goto failed;
2001 }
2002
2003 g = alloc_disk(1 << PARTN_BITS);
2004 if (!g)
2005 goto out_free_cd;
2006
2007 ide_init_disk(g, drive);
2008
2009 info->dev.parent = &drive->gendev;
2010 info->dev.release = ide_cd_release;
2011 dev_set_name(&info->dev, dev_name(&drive->gendev));
2012
2013 if (device_register(&info->dev))
2014 goto out_free_disk;
2015
2016 info->drive = drive;
2017 info->driver = &ide_cdrom_driver;
2018 info->disk = g;
2019
2020 g->private_data = &info->driver;
2021
2022 drive->driver_data = info;
2023
2024 g->minors = 1;
2025 g->driverfs_dev = &drive->gendev;
2026 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2027 if (ide_cdrom_setup(drive)) {
2028 put_device(&info->dev);
2029 goto failed;
2030 }
2031
2032 ide_cd_read_toc(drive, &sense);
2033 g->fops = &idecd_ops;
2034 g->flags |= GENHD_FL_REMOVABLE;
2035 add_disk(g);
2036 return 0;
2037
2038 out_free_disk:
2039 put_disk(g);
2040 out_free_cd:
2041 kfree(info);
2042 failed:
2043 return -ENODEV;
2044 }
2045
2046 static void __exit ide_cdrom_exit(void)
2047 {
2048 driver_unregister(&ide_cdrom_driver.gen_driver);
2049 }
2050
2051 static int __init ide_cdrom_init(void)
2052 {
2053 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2054 return driver_register(&ide_cdrom_driver.gen_driver);
2055 }
2056
2057 MODULE_ALIAS("ide:*m-cdrom*");
2058 MODULE_ALIAS("ide-cd");
2059 module_init(ide_cdrom_init);
2060 module_exit(ide_cdrom_exit);
2061 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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