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cpuset: remove remaining pointers to cpumask_t
[linux-2.6/mini2440.git] / drivers / ide / ide-cd.c
blobcae69372cf45c81e51bbe14b57aa08e3f3466f94
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 kref *);
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 kref_get(&cd->kref);
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 kref_put(&cd->kref, ide_cd_release);
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 if (sector < get_capacity(info->disk) &&
198 drive->probed_capacity - sector < 4 * 75)
199 set_capacity(info->disk, sector);
200 }
201 }
202
203 ide_cd_log_error(drive->name, failed_command, sense);
204 }
205
206 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
207 struct request *failed_command)
208 {
209 struct cdrom_info *info = drive->driver_data;
210 struct request *rq = &info->request_sense_request;
211
212 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
213
214 if (sense == NULL)
215 sense = &info->sense_data;
216
217 /* stuff the sense request in front of our current request */
218 blk_rq_init(NULL, rq);
219 rq->cmd_type = REQ_TYPE_ATA_PC;
220 rq->rq_disk = info->disk;
221
222 rq->data = sense;
223 rq->cmd[0] = GPCMD_REQUEST_SENSE;
224 rq->cmd[4] = 18;
225 rq->data_len = 18;
226
227 rq->cmd_type = REQ_TYPE_SENSE;
228 rq->cmd_flags |= REQ_PREEMPT;
229
230 /* NOTE! Save the failed command in "rq->buffer" */
231 rq->buffer = (void *) failed_command;
232
233 if (failed_command)
234 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
235 failed_command->cmd[0]);
236
237 ide_do_drive_cmd(drive, rq);
238 }
239
240 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
241 {
242 struct request *rq = drive->hwif->rq;
243 int nsectors = rq->hard_cur_sectors;
244
245 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
246 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
247 nsectors);
248
249 if (blk_sense_request(rq) && uptodate) {
250 /*
251 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
252 * failed request
253 */
254 struct request *failed = (struct request *) rq->buffer;
255 struct cdrom_info *info = drive->driver_data;
256 void *sense = &info->sense_data;
257
258 if (failed) {
259 if (failed->sense) {
260 sense = failed->sense;
261 failed->sense_len = rq->sense_len;
262 }
263 cdrom_analyze_sense_data(drive, failed, sense);
264 /*
265 * now end the failed request
266 */
267 if (blk_fs_request(failed)) {
268 if (ide_end_dequeued_request(drive, failed, 0,
269 failed->hard_nr_sectors))
270 BUG();
271 } else {
272 if (blk_end_request(failed, -EIO,
273 failed->data_len))
274 BUG();
275 }
276 } else
277 cdrom_analyze_sense_data(drive, NULL, sense);
278 }
279
280 if (!rq->current_nr_sectors && blk_fs_request(rq))
281 uptodate = 1;
282 /* make sure it's fully ended */
283 if (blk_pc_request(rq))
284 nsectors = (rq->data_len + 511) >> 9;
285 if (!nsectors)
286 nsectors = 1;
287
288 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
289 __func__, uptodate, nsectors);
290
291 ide_end_request(drive, uptodate, nsectors);
292 }
293
294 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
295 {
296 if (st & 0x80)
297 return;
298 ide_dump_status(drive, msg, st);
299 }
300
301 /*
302 * Returns:
303 * 0: if the request should be continued.
304 * 1: if the request was ended.
305 */
306 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
307 {
308 ide_hwif_t *hwif = drive->hwif;
309 struct request *rq = hwif->rq;
310 int stat, err, sense_key;
311
312 /* check for errors */
313 stat = hwif->tp_ops->read_status(hwif);
314
315 if (stat_ret)
316 *stat_ret = stat;
317
318 if (OK_STAT(stat, good_stat, BAD_R_STAT))
319 return 0;
320
321 /* get the IDE error register */
322 err = ide_read_error(drive);
323 sense_key = err >> 4;
324
325 if (rq == NULL) {
326 printk(KERN_ERR PFX "%s: missing rq in %s\n",
327 drive->name, __func__);
328 return 1;
329 }
330
331 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
332 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
333 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
334
335 if (blk_sense_request(rq)) {
336 /*
337 * We got an error trying to get sense info from the drive
338 * (probably while trying to recover from a former error).
339 * Just give up.
340 */
341 rq->cmd_flags |= REQ_FAILED;
342 cdrom_end_request(drive, 0);
343 ide_error(drive, "request sense failure", stat);
344 return 1;
345
346 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
347 /* All other functions, except for READ. */
348
349 /*
350 * if we have an error, pass back CHECK_CONDITION as the
351 * scsi status byte
352 */
353 if (blk_pc_request(rq) && !rq->errors)
354 rq->errors = SAM_STAT_CHECK_CONDITION;
355
356 /* check for tray open */
357 if (sense_key == NOT_READY) {
358 cdrom_saw_media_change(drive);
359 } else if (sense_key == UNIT_ATTENTION) {
360 /* check for media change */
361 cdrom_saw_media_change(drive);
362 return 0;
363 } else if (sense_key == ILLEGAL_REQUEST &&
364 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
365 /*
366 * Don't print error message for this condition--
367 * SFF8090i indicates that 5/24/00 is the correct
368 * response to a request to close the tray if the
369 * drive doesn't have that capability.
370 * cdrom_log_sense() knows this!
371 */
372 } else if (!(rq->cmd_flags & REQ_QUIET)) {
373 /* otherwise, print an error */
374 ide_dump_status(drive, "packet command error", stat);
375 }
376
377 rq->cmd_flags |= REQ_FAILED;
378
379 /*
380 * instead of playing games with moving completions around,
381 * remove failed request completely and end it when the
382 * request sense has completed
383 */
384 goto end_request;
385
386 } else if (blk_fs_request(rq)) {
387 int do_end_request = 0;
388
389 /* handle errors from READ and WRITE requests */
390
391 if (blk_noretry_request(rq))
392 do_end_request = 1;
393
394 if (sense_key == NOT_READY) {
395 /* tray open */
396 if (rq_data_dir(rq) == READ) {
397 cdrom_saw_media_change(drive);
398
399 /* fail the request */
400 printk(KERN_ERR PFX "%s: tray open\n",
401 drive->name);
402 do_end_request = 1;
403 } else {
404 struct cdrom_info *info = drive->driver_data;
405
406 /*
407 * Allow the drive 5 seconds to recover, some
408 * devices will return this error while flushing
409 * data from cache.
410 */
411 if (!rq->errors)
412 info->write_timeout = jiffies +
413 ATAPI_WAIT_WRITE_BUSY;
414 rq->errors = 1;
415 if (time_after(jiffies, info->write_timeout))
416 do_end_request = 1;
417 else {
418 struct request_queue *q = drive->queue;
419 unsigned long flags;
420
421 /*
422 * take a breather relying on the unplug
423 * timer to kick us again
424 */
425 spin_lock_irqsave(q->queue_lock, flags);
426 blk_plug_device(q);
427 spin_unlock_irqrestore(q->queue_lock, flags);
428
429 return 1;
430 }
431 }
432 } else if (sense_key == UNIT_ATTENTION) {
433 /* media change */
434 cdrom_saw_media_change(drive);
435
436 /*
437 * Arrange to retry the request but be sure to give up
438 * if we've retried too many times.
439 */
440 if (++rq->errors > ERROR_MAX)
441 do_end_request = 1;
442 } else if (sense_key == ILLEGAL_REQUEST ||
443 sense_key == DATA_PROTECT) {
444 /*
445 * No point in retrying after an illegal request or data
446 * protect error.
447 */
448 ide_dump_status_no_sense(drive, "command error", stat);
449 do_end_request = 1;
450 } else if (sense_key == MEDIUM_ERROR) {
451 /*
452 * No point in re-trying a zillion times on a bad
453 * sector. If we got here the error is not correctable.
454 */
455 ide_dump_status_no_sense(drive,
456 "media error (bad sector)",
457 stat);
458 do_end_request = 1;
459 } else if (sense_key == BLANK_CHECK) {
460 /* disk appears blank ?? */
461 ide_dump_status_no_sense(drive, "media error (blank)",
462 stat);
463 do_end_request = 1;
464 } else if ((err & ~ATA_ABORTED) != 0) {
465 /* go to the default handler for other errors */
466 ide_error(drive, "cdrom_decode_status", stat);
467 return 1;
468 } else if ((++rq->errors > ERROR_MAX)) {
469 /* we've racked up too many retries, abort */
470 do_end_request = 1;
471 }
472
473 /*
474 * End a request through request sense analysis when we have
475 * sense data. We need this in order to perform end of media
476 * processing.
477 */
478 if (do_end_request)
479 goto end_request;
480
481 /*
482 * If we got a CHECK_CONDITION status, queue
483 * a request sense command.
484 */
485 if (stat & ATA_ERR)
486 cdrom_queue_request_sense(drive, NULL, NULL);
487 } else {
488 blk_dump_rq_flags(rq, PFX "bad rq");
489 cdrom_end_request(drive, 0);
490 }
491
492 /* retry, or handle the next request */
493 return 1;
494
495 end_request:
496 if (stat & ATA_ERR) {
497 struct request_queue *q = drive->queue;
498 unsigned long flags;
499
500 spin_lock_irqsave(q->queue_lock, flags);
501 blkdev_dequeue_request(rq);
502 spin_unlock_irqrestore(q->queue_lock, flags);
503
504 hwif->rq = NULL;
505
506 cdrom_queue_request_sense(drive, rq->sense, rq);
507 } else
508 cdrom_end_request(drive, 0);
509
510 return 1;
511 }
512
513 /*
514 * Check the contents of the interrupt reason register from the cdrom
515 * and attempt to recover if there are problems. Returns 0 if everything's
516 * ok; nonzero if the request has been terminated.
517 */
518 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
519 int len, int ireason, int rw)
520 {
521 ide_hwif_t *hwif = drive->hwif;
522
523 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
524 __func__, ireason, rw);
525
526 /*
527 * ireason == 0: the drive wants to receive data from us
528 * ireason == 2: the drive is expecting to transfer data to us
529 */
530 if (ireason == (!rw << 1))
531 return 0;
532 else if (ireason == (rw << 1)) {
533
534 /* whoops... */
535 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
536 drive->name, __func__);
537
538 ide_pad_transfer(drive, rw, len);
539 } else if (rw == 0 && ireason == 1) {
540 /*
541 * Some drives (ASUS) seem to tell us that status info is
542 * available. Just get it and ignore.
543 */
544 (void)hwif->tp_ops->read_status(hwif);
545 return 0;
546 } else {
547 /* drive wants a command packet, or invalid ireason... */
548 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
549 drive->name, __func__, ireason);
550 }
551
552 if (rq->cmd_type == REQ_TYPE_ATA_PC)
553 rq->cmd_flags |= REQ_FAILED;
554
555 cdrom_end_request(drive, 0);
556 return -1;
557 }
558
559 /*
560 * Assume that the drive will always provide data in multiples of at least
561 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
562 */
563 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
564 {
565 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
566
567 if ((len % SECTOR_SIZE) == 0)
568 return 0;
569
570 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
571 __func__, len);
572
573 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
574 printk(KERN_ERR PFX "This drive is not supported by this "
575 "version of the driver\n");
576 else {
577 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
578 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
579 }
580
581 return 1;
582 }
583
584 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
585 struct request *rq)
586 {
587 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
588 rq->cmd_flags);
589
590 if (rq_data_dir(rq) == READ) {
591 unsigned short sectors_per_frame =
592 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
593 int nskip = rq->sector & (sectors_per_frame - 1);
594
595 /*
596 * If the requested sector doesn't start on a frame boundary,
597 * we must adjust the start of the transfer so that it does,
598 * and remember to skip the first few sectors.
599 *
600 * If the rq->current_nr_sectors field is larger than the size
601 * of the buffer, it will mean that we're to skip a number of
602 * sectors equal to the amount by which rq->current_nr_sectors
603 * is larger than the buffer size.
604 */
605 if (nskip > 0) {
606 /* sanity check... */
607 if (rq->current_nr_sectors !=
608 bio_cur_sectors(rq->bio)) {
609 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
610 drive->name, __func__,
611 rq->current_nr_sectors);
612 cdrom_end_request(drive, 0);
613 return ide_stopped;
614 }
615 rq->current_nr_sectors += nskip;
616 }
617 }
618
619 /* set up the command */
620 rq->timeout = ATAPI_WAIT_PC;
621
622 return ide_started;
623 }
624
625 /*
626 * Fix up a possibly partially-processed request so that we can start it over
627 * entirely, or even put it back on the request queue.
628 */
629 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
630 {
631
632 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
633
634 if (rq->buffer != bio_data(rq->bio)) {
635 sector_t n =
636 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
637
638 rq->buffer = bio_data(rq->bio);
639 rq->nr_sectors += n;
640 rq->sector -= n;
641 }
642 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
643 rq->hard_cur_sectors = rq->current_nr_sectors;
644 rq->hard_nr_sectors = rq->nr_sectors;
645 rq->hard_sector = rq->sector;
646 rq->q->prep_rq_fn(rq->q, rq);
647 }
648
649 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
650 {
651 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
652 __func__, rq->cmd[0]);
653
654 /*
655 * Some of the trailing request sense fields are optional,
656 * and some drives don't send them. Sigh.
657 */
658 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
659 rq->data_len > 0 && rq->data_len <= 5)
660 while (rq->data_len > 0) {
661 *(u8 *)rq->data++ = 0;
662 --rq->data_len;
663 }
664 }
665
666 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
667 int write, void *buffer, unsigned *bufflen,
668 struct request_sense *sense, int timeout,
669 unsigned int cmd_flags)
670 {
671 struct cdrom_info *info = drive->driver_data;
672 struct request_sense local_sense;
673 int retries = 10;
674 unsigned int flags = 0;
675
676 if (!sense)
677 sense = &local_sense;
678
679 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
680 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
681 timeout, cmd_flags);
682
683 /* start of retry loop */
684 do {
685 struct request *rq;
686 int error;
687
688 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
689
690 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
691 rq->cmd_type = REQ_TYPE_ATA_PC;
692 rq->sense = sense;
693 rq->cmd_flags |= cmd_flags;
694 rq->timeout = timeout;
695 if (buffer) {
696 rq->data = buffer;
697 rq->data_len = *bufflen;
698 }
699
700 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
701
702 if (buffer)
703 *bufflen = rq->data_len;
704
705 flags = rq->cmd_flags;
706 blk_put_request(rq);
707
708 /*
709 * FIXME: we should probably abort/retry or something in case of
710 * failure.
711 */
712 if (flags & REQ_FAILED) {
713 /*
714 * The request failed. Retry if it was due to a unit
715 * attention status (usually means media was changed).
716 */
717 struct request_sense *reqbuf = sense;
718
719 if (reqbuf->sense_key == UNIT_ATTENTION)
720 cdrom_saw_media_change(drive);
721 else if (reqbuf->sense_key == NOT_READY &&
722 reqbuf->asc == 4 && reqbuf->ascq != 4) {
723 /*
724 * The drive is in the process of loading
725 * a disk. Retry, but wait a little to give
726 * the drive time to complete the load.
727 */
728 ssleep(2);
729 } else {
730 /* otherwise, don't retry */
731 retries = 0;
732 }
733 --retries;
734 }
735
736 /* end of retry loop */
737 } while ((flags & REQ_FAILED) && retries >= 0);
738
739 /* return an error if the command failed */
740 return (flags & REQ_FAILED) ? -EIO : 0;
741 }
742
743 /*
744 * Called from blk_end_request_callback() after the data of the request is
745 * completed and before the request itself is completed. By returning value '1',
746 * blk_end_request_callback() returns immediately without completing it.
747 */
748 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
749 {
750 return 1;
751 }
752
753 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
754 {
755 ide_hwif_t *hwif = drive->hwif;
756 struct request *rq = hwif->rq;
757 xfer_func_t *xferfunc;
758 ide_expiry_t *expiry = NULL;
759 int dma_error = 0, dma, stat, thislen, uptodate = 0;
760 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
761 unsigned int timeout;
762 u16 len;
763 u8 ireason;
764
765 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
766 __func__, rq->cmd[0], write);
767
768 /* check for errors */
769 dma = drive->dma;
770 if (dma) {
771 drive->dma = 0;
772 dma_error = hwif->dma_ops->dma_end(drive);
773 if (dma_error) {
774 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
775 write ? "write" : "read");
776 ide_dma_off(drive);
777 }
778 }
779
780 if (cdrom_decode_status(drive, 0, &stat))
781 return ide_stopped;
782
783 /* using dma, transfer is complete now */
784 if (dma) {
785 if (dma_error)
786 return ide_error(drive, "dma error", stat);
787 if (blk_fs_request(rq)) {
788 ide_end_request(drive, 1, rq->nr_sectors);
789 return ide_stopped;
790 }
791 goto end_request;
792 }
793
794 ide_read_bcount_and_ireason(drive, &len, &ireason);
795
796 thislen = blk_fs_request(rq) ? len : rq->data_len;
797 if (thislen > len)
798 thislen = len;
799
800 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
801 __func__, stat, thislen);
802
803 /* If DRQ is clear, the command has completed. */
804 if ((stat & ATA_DRQ) == 0) {
805 if (blk_fs_request(rq)) {
806 /*
807 * If we're not done reading/writing, complain.
808 * Otherwise, complete the command normally.
809 */
810 uptodate = 1;
811 if (rq->current_nr_sectors > 0) {
812 printk(KERN_ERR PFX "%s: %s: data underrun "
813 "(%d blocks)\n",
814 drive->name, __func__,
815 rq->current_nr_sectors);
816 if (!write)
817 rq->cmd_flags |= REQ_FAILED;
818 uptodate = 0;
819 }
820 cdrom_end_request(drive, uptodate);
821 return ide_stopped;
822 } else if (!blk_pc_request(rq)) {
823 ide_cd_request_sense_fixup(drive, rq);
824 /* complain if we still have data left to transfer */
825 uptodate = rq->data_len ? 0 : 1;
826 }
827 goto end_request;
828 }
829
830 /* check which way to transfer data */
831 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
832 return ide_stopped;
833
834 if (blk_fs_request(rq)) {
835 if (write == 0) {
836 int nskip;
837
838 if (ide_cd_check_transfer_size(drive, len)) {
839 cdrom_end_request(drive, 0);
840 return ide_stopped;
841 }
842
843 /*
844 * First, figure out if we need to bit-bucket
845 * any of the leading sectors.
846 */
847 nskip = min_t(int, rq->current_nr_sectors
848 - bio_cur_sectors(rq->bio),
849 thislen >> 9);
850 if (nskip > 0) {
851 ide_pad_transfer(drive, write, nskip << 9);
852 rq->current_nr_sectors -= nskip;
853 thislen -= (nskip << 9);
854 }
855 }
856 }
857
858 if (ireason == 0) {
859 write = 1;
860 xferfunc = hwif->tp_ops->output_data;
861 } else {
862 write = 0;
863 xferfunc = hwif->tp_ops->input_data;
864 }
865
866 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
867 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
868
869 /* transfer data */
870 while (thislen > 0) {
871 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
872 int blen = rq->data_len;
873
874 /* bio backed? */
875 if (rq->bio) {
876 if (blk_fs_request(rq)) {
877 ptr = rq->buffer;
878 blen = rq->current_nr_sectors << 9;
879 } else {
880 ptr = bio_data(rq->bio);
881 blen = bio_iovec(rq->bio)->bv_len;
882 }
883 }
884
885 if (!ptr) {
886 if (blk_fs_request(rq) && !write)
887 /*
888 * If the buffers are full, pipe the rest into
889 * oblivion.
890 */
891 ide_pad_transfer(drive, 0, thislen);
892 else {
893 printk(KERN_ERR PFX "%s: confused, missing data\n",
894 drive->name);
895 blk_dump_rq_flags(rq, rq_data_dir(rq)
896 ? "cdrom_newpc_intr, write"
897 : "cdrom_newpc_intr, read");
898 }
899 break;
900 }
901
902 if (blen > thislen)
903 blen = thislen;
904
905 xferfunc(drive, NULL, ptr, blen);
906
907 thislen -= blen;
908 len -= blen;
909
910 if (blk_fs_request(rq)) {
911 rq->buffer += blen;
912 rq->nr_sectors -= (blen >> 9);
913 rq->current_nr_sectors -= (blen >> 9);
914 rq->sector += (blen >> 9);
915
916 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
917 cdrom_end_request(drive, 1);
918 } else {
919 rq->data_len -= blen;
920
921 /*
922 * The request can't be completed until DRQ is cleared.
923 * So complete the data, but don't complete the request
924 * using the dummy function for the callback feature
925 * of blk_end_request_callback().
926 */
927 if (rq->bio)
928 blk_end_request_callback(rq, 0, blen,
929 cdrom_newpc_intr_dummy_cb);
930 else
931 rq->data += blen;
932 }
933 if (!write && blk_sense_request(rq))
934 rq->sense_len += blen;
935 }
936
937 /* pad, if necessary */
938 if (!blk_fs_request(rq) && len > 0)
939 ide_pad_transfer(drive, write, len);
940
941 if (blk_pc_request(rq)) {
942 timeout = rq->timeout;
943 } else {
944 timeout = ATAPI_WAIT_PC;
945 if (!blk_fs_request(rq))
946 expiry = ide_cd_expiry;
947 }
948
949 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
950 return ide_started;
951
952 end_request:
953 if (blk_pc_request(rq)) {
954 unsigned int dlen = rq->data_len;
955
956 if (dma)
957 rq->data_len = 0;
958
959 if (blk_end_request(rq, 0, dlen))
960 BUG();
961
962 hwif->rq = NULL;
963 } else {
964 if (!uptodate)
965 rq->cmd_flags |= REQ_FAILED;
966 cdrom_end_request(drive, uptodate);
967 }
968 return ide_stopped;
969 }
970
971 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
972 {
973 struct cdrom_info *cd = drive->driver_data;
974 int write = rq_data_dir(rq) == WRITE;
975 unsigned short sectors_per_frame =
976 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
977
978 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
979 "secs_per_frame: %u\n",
980 __func__, rq->cmd[0], write, sectors_per_frame);
981
982 if (write) {
983 /* disk has become write protected */
984 if (get_disk_ro(cd->disk)) {
985 cdrom_end_request(drive, 0);
986 return ide_stopped;
987 }
988 } else {
989 /*
990 * We may be retrying this request after an error. Fix up any
991 * weirdness which might be present in the request packet.
992 */
993 ide_cd_restore_request(drive, rq);
994 }
995
996 /* use DMA, if possible / writes *must* be hardware frame aligned */
997 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
998 (rq->sector & (sectors_per_frame - 1))) {
999 if (write) {
1000 cdrom_end_request(drive, 0);
1001 return ide_stopped;
1002 }
1003 drive->dma = 0;
1004 } else
1005 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1006
1007 if (write)
1008 cd->devinfo.media_written = 1;
1009
1010 return ide_started;
1011 }
1012
1013 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1014 {
1015
1016 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1017 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1018 rq->cmd_type);
1019
1020 if (blk_pc_request(rq))
1021 rq->cmd_flags |= REQ_QUIET;
1022 else
1023 rq->cmd_flags &= ~REQ_FAILED;
1024
1025 drive->dma = 0;
1026
1027 /* sg request */
1028 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1029 struct request_queue *q = drive->queue;
1030 unsigned int alignment;
1031 char *buf;
1032
1033 if (rq->bio)
1034 buf = bio_data(rq->bio);
1035 else
1036 buf = rq->data;
1037
1038 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1039
1040 /*
1041 * check if dma is safe
1042 *
1043 * NOTE! The "len" and "addr" checks should possibly have
1044 * separate masks.
1045 */
1046 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1047 if ((unsigned long)buf & alignment
1048 || rq->data_len & q->dma_pad_mask
1049 || object_is_on_stack(buf))
1050 drive->dma = 0;
1051 }
1052 }
1053
1054 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1055 sector_t block)
1056 {
1057 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1058 "rq->cmd_type: 0x%x, block: %llu\n",
1059 __func__, rq->cmd[0], rq->cmd_type,
1060 (unsigned long long)block);
1061
1062 if (blk_fs_request(rq)) {
1063 if (cdrom_start_rw(drive, rq) == ide_stopped)
1064 return ide_stopped;
1065
1066 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1067 return ide_stopped;
1068 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1069 rq->cmd_type == REQ_TYPE_ATA_PC) {
1070 if (!rq->timeout)
1071 rq->timeout = ATAPI_WAIT_PC;
1072
1073 cdrom_do_block_pc(drive, rq);
1074 } else if (blk_special_request(rq)) {
1075 /* right now this can only be a reset... */
1076 cdrom_end_request(drive, 1);
1077 return ide_stopped;
1078 } else {
1079 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1080 cdrom_end_request(drive, 0);
1081 return ide_stopped;
1082 }
1083
1084 return ide_issue_pc(drive);
1085 }
1086
1087 /*
1088 * Ioctl handling.
1089 *
1090 * Routines which queue packet commands take as a final argument a pointer to a
1091 * request_sense struct. If execution of the command results in an error with a
1092 * CHECK CONDITION status, this structure will be filled with the results of the
1093 * subsequent request sense command. The pointer can also be NULL, in which case
1094 * no sense information is returned.
1095 */
1096 static void msf_from_bcd(struct atapi_msf *msf)
1097 {
1098 msf->minute = bcd2bin(msf->minute);
1099 msf->second = bcd2bin(msf->second);
1100 msf->frame = bcd2bin(msf->frame);
1101 }
1102
1103 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1104 {
1105 struct cdrom_info *info = drive->driver_data;
1106 struct cdrom_device_info *cdi = &info->devinfo;
1107 unsigned char cmd[BLK_MAX_CDB];
1108
1109 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1110
1111 memset(cmd, 0, BLK_MAX_CDB);
1112 cmd[0] = GPCMD_TEST_UNIT_READY;
1113
1114 /*
1115 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1116 * instead of supporting the LOAD_UNLOAD opcode.
1117 */
1118 cmd[7] = cdi->sanyo_slot % 3;
1119
1120 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1121 }
1122
1123 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1124 unsigned long *sectors_per_frame,
1125 struct request_sense *sense)
1126 {
1127 struct {
1128 __be32 lba;
1129 __be32 blocklen;
1130 } capbuf;
1131
1132 int stat;
1133 unsigned char cmd[BLK_MAX_CDB];
1134 unsigned len = sizeof(capbuf);
1135 u32 blocklen;
1136
1137 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1138
1139 memset(cmd, 0, BLK_MAX_CDB);
1140 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1141
1142 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1143 REQ_QUIET);
1144 if (stat)
1145 return stat;
1146
1147 /*
1148 * Sanity check the given block size
1149 */
1150 blocklen = be32_to_cpu(capbuf.blocklen);
1151 switch (blocklen) {
1152 case 512:
1153 case 1024:
1154 case 2048:
1155 case 4096:
1156 break;
1157 default:
1158 printk(KERN_ERR PFX "%s: weird block size %u\n",
1159 drive->name, blocklen);
1160 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1161 drive->name);
1162 blocklen = 2048;
1163 break;
1164 }
1165
1166 *capacity = 1 + be32_to_cpu(capbuf.lba);
1167 *sectors_per_frame = blocklen >> SECTOR_BITS;
1168
1169 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1170 __func__, *capacity, *sectors_per_frame);
1171
1172 return 0;
1173 }
1174
1175 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1176 int format, char *buf, int buflen,
1177 struct request_sense *sense)
1178 {
1179 unsigned char cmd[BLK_MAX_CDB];
1180
1181 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1182
1183 memset(cmd, 0, BLK_MAX_CDB);
1184
1185 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1186 cmd[6] = trackno;
1187 cmd[7] = (buflen >> 8);
1188 cmd[8] = (buflen & 0xff);
1189 cmd[9] = (format << 6);
1190
1191 if (msf_flag)
1192 cmd[1] = 2;
1193
1194 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1195 }
1196
1197 /* Try to read the entire TOC for the disk into our internal buffer. */
1198 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1199 {
1200 int stat, ntracks, i;
1201 struct cdrom_info *info = drive->driver_data;
1202 struct cdrom_device_info *cdi = &info->devinfo;
1203 struct atapi_toc *toc = info->toc;
1204 struct {
1205 struct atapi_toc_header hdr;
1206 struct atapi_toc_entry ent;
1207 } ms_tmp;
1208 long last_written;
1209 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1210
1211 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1212
1213 if (toc == NULL) {
1214 /* try to allocate space */
1215 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1216 if (toc == NULL) {
1217 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1218 drive->name);
1219 return -ENOMEM;
1220 }
1221 info->toc = toc;
1222 }
1223
1224 /*
1225 * Check to see if the existing data is still valid. If it is,
1226 * just return.
1227 */
1228 (void) cdrom_check_status(drive, sense);
1229
1230 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1231 return 0;
1232
1233 /* try to get the total cdrom capacity and sector size */
1234 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1235 sense);
1236 if (stat)
1237 toc->capacity = 0x1fffff;
1238
1239 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1240 /* save a private copy of the TOC capacity for error handling */
1241 drive->probed_capacity = toc->capacity * sectors_per_frame;
1242
1243 blk_queue_hardsect_size(drive->queue,
1244 sectors_per_frame << SECTOR_BITS);
1245
1246 /* first read just the header, so we know how long the TOC is */
1247 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1248 sizeof(struct atapi_toc_header), sense);
1249 if (stat)
1250 return stat;
1251
1252 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1253 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1254 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1255 }
1256
1257 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1258 if (ntracks <= 0)
1259 return -EIO;
1260 if (ntracks > MAX_TRACKS)
1261 ntracks = MAX_TRACKS;
1262
1263 /* now read the whole schmeer */
1264 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1265 (char *)&toc->hdr,
1266 sizeof(struct atapi_toc_header) +
1267 (ntracks + 1) *
1268 sizeof(struct atapi_toc_entry), sense);
1269
1270 if (stat && toc->hdr.first_track > 1) {
1271 /*
1272 * Cds with CDI tracks only don't have any TOC entries, despite
1273 * of this the returned values are
1274 * first_track == last_track = number of CDI tracks + 1,
1275 * so that this case is indistinguishable from the same layout
1276 * plus an additional audio track. If we get an error for the
1277 * regular case, we assume a CDI without additional audio
1278 * tracks. In this case the readable TOC is empty (CDI tracks
1279 * are not included) and only holds the Leadout entry.
1280 *
1281 * Heiko Eißfeldt.
1282 */
1283 ntracks = 0;
1284 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1285 (char *)&toc->hdr,
1286 sizeof(struct atapi_toc_header) +
1287 (ntracks + 1) *
1288 sizeof(struct atapi_toc_entry),
1289 sense);
1290 if (stat)
1291 return stat;
1292
1293 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1294 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1295 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1296 } else {
1297 toc->hdr.first_track = CDROM_LEADOUT;
1298 toc->hdr.last_track = CDROM_LEADOUT;
1299 }
1300 }
1301
1302 if (stat)
1303 return stat;
1304
1305 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1306
1307 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1308 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1309 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1310 }
1311
1312 for (i = 0; i <= ntracks; i++) {
1313 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1314 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1315 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1316 msf_from_bcd(&toc->ent[i].addr.msf);
1317 }
1318 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1319 toc->ent[i].addr.msf.second,
1320 toc->ent[i].addr.msf.frame);
1321 }
1322
1323 if (toc->hdr.first_track != CDROM_LEADOUT) {
1324 /* read the multisession information */
1325 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1326 sizeof(ms_tmp), sense);
1327 if (stat)
1328 return stat;
1329
1330 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1331 } else {
1332 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1333 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1334 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1335 }
1336
1337 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1338 /* re-read multisession information using MSF format */
1339 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1340 sizeof(ms_tmp), sense);
1341 if (stat)
1342 return stat;
1343
1344 msf_from_bcd(&ms_tmp.ent.addr.msf);
1345 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1346 ms_tmp.ent.addr.msf.second,
1347 ms_tmp.ent.addr.msf.frame);
1348 }
1349
1350 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1351
1352 /* now try to get the total cdrom capacity */
1353 stat = cdrom_get_last_written(cdi, &last_written);
1354 if (!stat && (last_written > toc->capacity)) {
1355 toc->capacity = last_written;
1356 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1357 drive->probed_capacity = toc->capacity * sectors_per_frame;
1358 }
1359
1360 /* Remember that we've read this stuff. */
1361 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1362
1363 return 0;
1364 }
1365
1366 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1367 {
1368 struct cdrom_info *info = drive->driver_data;
1369 struct cdrom_device_info *cdi = &info->devinfo;
1370 struct packet_command cgc;
1371 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1372
1373 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1374
1375 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1376 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1377
1378 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1379 do {
1380 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1381 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1382 if (!stat)
1383 break;
1384 } while (--attempts);
1385 return stat;
1386 }
1387
1388 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1389 {
1390 struct cdrom_info *cd = drive->driver_data;
1391 u16 curspeed, maxspeed;
1392
1393 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1394
1395 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1396 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1397 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1398 } else {
1399 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1400 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1401 }
1402
1403 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1404 __func__, curspeed, maxspeed);
1405
1406 cd->current_speed = (curspeed + (176/2)) / 176;
1407 cd->max_speed = (maxspeed + (176/2)) / 176;
1408 }
1409
1410 #define IDE_CD_CAPABILITIES \
1411 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1412 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1413 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1414 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1415 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1416
1417 static struct cdrom_device_ops ide_cdrom_dops = {
1418 .open = ide_cdrom_open_real,
1419 .release = ide_cdrom_release_real,
1420 .drive_status = ide_cdrom_drive_status,
1421 .media_changed = ide_cdrom_check_media_change_real,
1422 .tray_move = ide_cdrom_tray_move,
1423 .lock_door = ide_cdrom_lock_door,
1424 .select_speed = ide_cdrom_select_speed,
1425 .get_last_session = ide_cdrom_get_last_session,
1426 .get_mcn = ide_cdrom_get_mcn,
1427 .reset = ide_cdrom_reset,
1428 .audio_ioctl = ide_cdrom_audio_ioctl,
1429 .capability = IDE_CD_CAPABILITIES,
1430 .generic_packet = ide_cdrom_packet,
1431 };
1432
1433 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1434 {
1435 struct cdrom_info *info = drive->driver_data;
1436 struct cdrom_device_info *devinfo = &info->devinfo;
1437
1438 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1439
1440 devinfo->ops = &ide_cdrom_dops;
1441 devinfo->speed = info->current_speed;
1442 devinfo->capacity = nslots;
1443 devinfo->handle = drive;
1444 strcpy(devinfo->name, drive->name);
1445
1446 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1447 devinfo->mask |= CDC_SELECT_SPEED;
1448
1449 devinfo->disk = info->disk;
1450 return register_cdrom(devinfo);
1451 }
1452
1453 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1454 {
1455 struct cdrom_info *cd = drive->driver_data;
1456 struct cdrom_device_info *cdi = &cd->devinfo;
1457 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1458 mechtype_t mechtype;
1459 int nslots = 1;
1460
1461 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1462 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1463 drive->atapi_flags);
1464
1465 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1466 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1467 CDC_MO_DRIVE | CDC_RAM);
1468
1469 if (drive->media == ide_optical) {
1470 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1471 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1472 drive->name);
1473 return nslots;
1474 }
1475
1476 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1477 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1478 cdi->mask &= ~CDC_PLAY_AUDIO;
1479 return nslots;
1480 }
1481
1482 /*
1483 * We have to cheat a little here. the packet will eventually be queued
1484 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1485 * Since this device hasn't been registered with the Uniform layer yet,
1486 * it can't do this. Same goes for cdi->ops.
1487 */
1488 cdi->handle = drive;
1489 cdi->ops = &ide_cdrom_dops;
1490
1491 if (ide_cdrom_get_capabilities(drive, buf))
1492 return 0;
1493
1494 if ((buf[8 + 6] & 0x01) == 0)
1495 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1496 if (buf[8 + 6] & 0x08)
1497 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1498 if (buf[8 + 3] & 0x01)
1499 cdi->mask &= ~CDC_CD_R;
1500 if (buf[8 + 3] & 0x02)
1501 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1502 if (buf[8 + 2] & 0x38)
1503 cdi->mask &= ~CDC_DVD;
1504 if (buf[8 + 3] & 0x20)
1505 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1506 if (buf[8 + 3] & 0x10)
1507 cdi->mask &= ~CDC_DVD_R;
1508 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1509 cdi->mask &= ~CDC_PLAY_AUDIO;
1510
1511 mechtype = buf[8 + 6] >> 5;
1512 if (mechtype == mechtype_caddy ||
1513 mechtype == mechtype_popup ||
1514 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1515 cdi->mask |= CDC_CLOSE_TRAY;
1516
1517 if (cdi->sanyo_slot > 0) {
1518 cdi->mask &= ~CDC_SELECT_DISC;
1519 nslots = 3;
1520 } else if (mechtype == mechtype_individual_changer ||
1521 mechtype == mechtype_cartridge_changer) {
1522 nslots = cdrom_number_of_slots(cdi);
1523 if (nslots > 1)
1524 cdi->mask &= ~CDC_SELECT_DISC;
1525 }
1526
1527 ide_cdrom_update_speed(drive, buf);
1528
1529 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1530
1531 /* don't print speed if the drive reported 0 */
1532 if (cd->max_speed)
1533 printk(KERN_CONT " %dX", cd->max_speed);
1534
1535 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1536
1537 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1538 printk(KERN_CONT " DVD%s%s",
1539 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1540 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1541
1542 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1543 printk(KERN_CONT " CD%s%s",
1544 (cdi->mask & CDC_CD_R) ? "" : "-R",
1545 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1546
1547 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1548 printk(KERN_CONT " changer w/%d slots", nslots);
1549 else
1550 printk(KERN_CONT " drive");
1551
1552 printk(KERN_CONT ", %dkB Cache\n",
1553 be16_to_cpup((__be16 *)&buf[8 + 12]));
1554
1555 return nslots;
1556 }
1557
1558 /* standard prep_rq_fn that builds 10 byte cmds */
1559 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1560 {
1561 int hard_sect = queue_hardsect_size(q);
1562 long block = (long)rq->hard_sector / (hard_sect >> 9);
1563 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1564
1565 memset(rq->cmd, 0, BLK_MAX_CDB);
1566
1567 if (rq_data_dir(rq) == READ)
1568 rq->cmd[0] = GPCMD_READ_10;
1569 else
1570 rq->cmd[0] = GPCMD_WRITE_10;
1571
1572 /*
1573 * fill in lba
1574 */
1575 rq->cmd[2] = (block >> 24) & 0xff;
1576 rq->cmd[3] = (block >> 16) & 0xff;
1577 rq->cmd[4] = (block >> 8) & 0xff;
1578 rq->cmd[5] = block & 0xff;
1579
1580 /*
1581 * and transfer length
1582 */
1583 rq->cmd[7] = (blocks >> 8) & 0xff;
1584 rq->cmd[8] = blocks & 0xff;
1585 rq->cmd_len = 10;
1586 return BLKPREP_OK;
1587 }
1588
1589 /*
1590 * Most of the SCSI commands are supported directly by ATAPI devices.
1591 * This transform handles the few exceptions.
1592 */
1593 static int ide_cdrom_prep_pc(struct request *rq)
1594 {
1595 u8 *c = rq->cmd;
1596
1597 /* transform 6-byte read/write commands to the 10-byte version */
1598 if (c[0] == READ_6 || c[0] == WRITE_6) {
1599 c[8] = c[4];
1600 c[5] = c[3];
1601 c[4] = c[2];
1602 c[3] = c[1] & 0x1f;
1603 c[2] = 0;
1604 c[1] &= 0xe0;
1605 c[0] += (READ_10 - READ_6);
1606 rq->cmd_len = 10;
1607 return BLKPREP_OK;
1608 }
1609
1610 /*
1611 * it's silly to pretend we understand 6-byte sense commands, just
1612 * reject with ILLEGAL_REQUEST and the caller should take the
1613 * appropriate action
1614 */
1615 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1616 rq->errors = ILLEGAL_REQUEST;
1617 return BLKPREP_KILL;
1618 }
1619
1620 return BLKPREP_OK;
1621 }
1622
1623 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1624 {
1625 if (blk_fs_request(rq))
1626 return ide_cdrom_prep_fs(q, rq);
1627 else if (blk_pc_request(rq))
1628 return ide_cdrom_prep_pc(rq);
1629
1630 return 0;
1631 }
1632
1633 struct cd_list_entry {
1634 const char *id_model;
1635 const char *id_firmware;
1636 unsigned int cd_flags;
1637 };
1638
1639 #ifdef CONFIG_IDE_PROC_FS
1640 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1641 {
1642 unsigned long capacity, sectors_per_frame;
1643
1644 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1645 return 0;
1646
1647 return capacity * sectors_per_frame;
1648 }
1649
1650 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1651 int count, int *eof, void *data)
1652 {
1653 ide_drive_t *drive = data;
1654 int len;
1655
1656 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1657 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1658 }
1659
1660 static ide_proc_entry_t idecd_proc[] = {
1661 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1662 { NULL, 0, NULL, NULL }
1663 };
1664
1665 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1666 {
1667 return idecd_proc;
1668 }
1669
1670 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1671 {
1672 return NULL;
1673 }
1674 #endif
1675
1676 static const struct cd_list_entry ide_cd_quirks_list[] = {
1677 /* Limit transfer size per interrupt. */
1678 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1679 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1680 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1681 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1682 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1683 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1684 IDE_AFLAG_PRE_ATAPI12, },
1685 /* Vertos 300, some versions of this drive like to talk BCD. */
1686 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1687 /* Vertos 600 ESD. */
1688 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1689 /*
1690 * Sanyo 3 CD changer uses a non-standard command for CD changing
1691 * (by default standard ATAPI support for CD changers is used).
1692 */
1693 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1694 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1695 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1696 /* Stingray 8X CD-ROM. */
1697 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1698 /*
1699 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1700 * mode sense page capabilities size, but older drives break.
1701 */
1702 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1703 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1704 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1705 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1706 /*
1707 * Some drives used by Apple don't advertise audio play
1708 * but they do support reading TOC & audio datas.
1709 */
1710 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1711 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1712 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1713 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1714 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1715 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1716 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1717 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1718 { NULL, NULL, 0 }
1719 };
1720
1721 static unsigned int ide_cd_flags(u16 *id)
1722 {
1723 const struct cd_list_entry *cle = ide_cd_quirks_list;
1724
1725 while (cle->id_model) {
1726 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1727 (cle->id_firmware == NULL ||
1728 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1729 return cle->cd_flags;
1730 cle++;
1731 }
1732
1733 return 0;
1734 }
1735
1736 static int ide_cdrom_setup(ide_drive_t *drive)
1737 {
1738 struct cdrom_info *cd = drive->driver_data;
1739 struct cdrom_device_info *cdi = &cd->devinfo;
1740 u16 *id = drive->id;
1741 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1742 int nslots;
1743
1744 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1745
1746 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1747 blk_queue_dma_alignment(drive->queue, 31);
1748 blk_queue_update_dma_pad(drive->queue, 15);
1749 drive->queue->unplug_delay = (1 * HZ) / 1000;
1750 if (!drive->queue->unplug_delay)
1751 drive->queue->unplug_delay = 1;
1752
1753 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1754 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1755
1756 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1757 fw_rev[4] == '1' && fw_rev[6] <= '2')
1758 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1759 IDE_AFLAG_TOCADDR_AS_BCD);
1760 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1761 fw_rev[4] == '1' && fw_rev[6] <= '2')
1762 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1763 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1764 /* 3 => use CD in slot 0 */
1765 cdi->sanyo_slot = 3;
1766
1767 nslots = ide_cdrom_probe_capabilities(drive);
1768
1769 /* set correct block size */
1770 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1771
1772 if (ide_cdrom_register(drive, nslots)) {
1773 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1774 " cdrom driver.\n", drive->name, __func__);
1775 cd->devinfo.handle = NULL;
1776 return 1;
1777 }
1778
1779 ide_proc_register_driver(drive, cd->driver);
1780 return 0;
1781 }
1782
1783 static void ide_cd_remove(ide_drive_t *drive)
1784 {
1785 struct cdrom_info *info = drive->driver_data;
1786
1787 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1788
1789 ide_proc_unregister_driver(drive, info->driver);
1790
1791 del_gendisk(info->disk);
1792
1793 ide_cd_put(info);
1794 }
1795
1796 static void ide_cd_release(struct kref *kref)
1797 {
1798 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1799 struct cdrom_device_info *devinfo = &info->devinfo;
1800 ide_drive_t *drive = info->drive;
1801 struct gendisk *g = info->disk;
1802
1803 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1804
1805 kfree(info->toc);
1806 if (devinfo->handle == drive)
1807 unregister_cdrom(devinfo);
1808 drive->driver_data = NULL;
1809 blk_queue_prep_rq(drive->queue, NULL);
1810 g->private_data = NULL;
1811 put_disk(g);
1812 kfree(info);
1813 }
1814
1815 static int ide_cd_probe(ide_drive_t *);
1816
1817 static struct ide_driver ide_cdrom_driver = {
1818 .gen_driver = {
1819 .owner = THIS_MODULE,
1820 .name = "ide-cdrom",
1821 .bus = &ide_bus_type,
1822 },
1823 .probe = ide_cd_probe,
1824 .remove = ide_cd_remove,
1825 .version = IDECD_VERSION,
1826 .do_request = ide_cd_do_request,
1827 .end_request = ide_end_request,
1828 #ifdef CONFIG_IDE_PROC_FS
1829 .proc_entries = ide_cd_proc_entries,
1830 .proc_devsets = ide_cd_proc_devsets,
1831 #endif
1832 };
1833
1834 static int idecd_open(struct block_device *bdev, fmode_t mode)
1835 {
1836 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1837 int rc = -ENOMEM;
1838
1839 if (!info)
1840 return -ENXIO;
1841
1842 rc = cdrom_open(&info->devinfo, bdev, mode);
1843
1844 if (rc < 0)
1845 ide_cd_put(info);
1846
1847 return rc;
1848 }
1849
1850 static int idecd_release(struct gendisk *disk, fmode_t mode)
1851 {
1852 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1853
1854 cdrom_release(&info->devinfo, mode);
1855
1856 ide_cd_put(info);
1857
1858 return 0;
1859 }
1860
1861 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1862 {
1863 struct packet_command cgc;
1864 char buffer[16];
1865 int stat;
1866 char spindown;
1867
1868 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1869 return -EFAULT;
1870
1871 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1872
1873 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1874 if (stat)
1875 return stat;
1876
1877 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1878 return cdrom_mode_select(cdi, &cgc);
1879 }
1880
1881 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1882 {
1883 struct packet_command cgc;
1884 char buffer[16];
1885 int stat;
1886 char spindown;
1887
1888 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1889
1890 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1891 if (stat)
1892 return stat;
1893
1894 spindown = buffer[11] & 0x0f;
1895 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1896 return -EFAULT;
1897 return 0;
1898 }
1899
1900 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1901 unsigned int cmd, unsigned long arg)
1902 {
1903 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1904 int err;
1905
1906 switch (cmd) {
1907 case CDROMSETSPINDOWN:
1908 return idecd_set_spindown(&info->devinfo, arg);
1909 case CDROMGETSPINDOWN:
1910 return idecd_get_spindown(&info->devinfo, arg);
1911 default:
1912 break;
1913 }
1914
1915 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1916 if (err == -EINVAL)
1917 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1918
1919 return err;
1920 }
1921
1922 static int idecd_media_changed(struct gendisk *disk)
1923 {
1924 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1925 return cdrom_media_changed(&info->devinfo);
1926 }
1927
1928 static int idecd_revalidate_disk(struct gendisk *disk)
1929 {
1930 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1931 struct request_sense sense;
1932
1933 ide_cd_read_toc(info->drive, &sense);
1934
1935 return 0;
1936 }
1937
1938 static struct block_device_operations idecd_ops = {
1939 .owner = THIS_MODULE,
1940 .open = idecd_open,
1941 .release = idecd_release,
1942 .locked_ioctl = idecd_ioctl,
1943 .media_changed = idecd_media_changed,
1944 .revalidate_disk = idecd_revalidate_disk
1945 };
1946
1947 /* module options */
1948 static char *ignore;
1949 module_param(ignore, charp, 0400);
1950
1951 static unsigned long debug_mask;
1952 module_param(debug_mask, ulong, 0644);
1953
1954 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1955
1956 static int ide_cd_probe(ide_drive_t *drive)
1957 {
1958 struct cdrom_info *info;
1959 struct gendisk *g;
1960 struct request_sense sense;
1961
1962 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1963 "drive->media: 0x%x\n", __func__, drive->driver_req,
1964 drive->media);
1965
1966 if (!strstr("ide-cdrom", drive->driver_req))
1967 goto failed;
1968
1969 if (drive->media != ide_cdrom && drive->media != ide_optical)
1970 goto failed;
1971
1972 /* skip drives that we were told to ignore */
1973 if (ignore != NULL) {
1974 if (strstr(ignore, drive->name)) {
1975 printk(KERN_INFO PFX "ignoring drive %s\n",
1976 drive->name);
1977 goto failed;
1978 }
1979 }
1980
1981 drive->debug_mask = debug_mask;
1982 drive->irq_handler = cdrom_newpc_intr;
1983
1984 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1985 if (info == NULL) {
1986 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1987 drive->name);
1988 goto failed;
1989 }
1990
1991 g = alloc_disk(1 << PARTN_BITS);
1992 if (!g)
1993 goto out_free_cd;
1994
1995 ide_init_disk(g, drive);
1996
1997 kref_init(&info->kref);
1998
1999 info->drive = drive;
2000 info->driver = &ide_cdrom_driver;
2001 info->disk = g;
2002
2003 g->private_data = &info->driver;
2004
2005 drive->driver_data = info;
2006
2007 g->minors = 1;
2008 g->driverfs_dev = &drive->gendev;
2009 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2010 if (ide_cdrom_setup(drive)) {
2011 ide_cd_release(&info->kref);
2012 goto failed;
2013 }
2014
2015 ide_cd_read_toc(drive, &sense);
2016 g->fops = &idecd_ops;
2017 g->flags |= GENHD_FL_REMOVABLE;
2018 add_disk(g);
2019 return 0;
2020
2021 out_free_cd:
2022 kfree(info);
2023 failed:
2024 return -ENODEV;
2025 }
2026
2027 static void __exit ide_cdrom_exit(void)
2028 {
2029 driver_unregister(&ide_cdrom_driver.gen_driver);
2030 }
2031
2032 static int __init ide_cdrom_init(void)
2033 {
2034 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2035 return driver_register(&ide_cdrom_driver.gen_driver);
2036 }
2037
2038 MODULE_ALIAS("ide:*m-cdrom*");
2039 MODULE_ALIAS("ide-cd");
2040 module_init(ide_cdrom_init);
2041 module_exit(ide_cdrom_exit);
2042 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards