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drm/i915: Set framebuffer alignment based upon the fence constraints.
[linux-2.6/linux-2.6-openrd.git] / drivers / ide / ide-cd.c
blob0bfeb0c79d6e8e172cdbb5fd3af9a9df084351c5
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 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
791 ide_end_request(drive, 1, 1);
792 return ide_stopped;
793 }
794 goto end_request;
795 }
796
797 ide_read_bcount_and_ireason(drive, &len, &ireason);
798
799 thislen = blk_fs_request(rq) ? len : rq->data_len;
800 if (thislen > len)
801 thislen = len;
802
803 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
804 __func__, stat, thislen);
805
806 /* If DRQ is clear, the command has completed. */
807 if ((stat & ATA_DRQ) == 0) {
808 if (blk_fs_request(rq)) {
809 /*
810 * If we're not done reading/writing, complain.
811 * Otherwise, complete the command normally.
812 */
813 uptodate = 1;
814 if (rq->current_nr_sectors > 0) {
815 printk(KERN_ERR PFX "%s: %s: data underrun "
816 "(%d blocks)\n",
817 drive->name, __func__,
818 rq->current_nr_sectors);
819 if (!write)
820 rq->cmd_flags |= REQ_FAILED;
821 uptodate = 0;
822 }
823 cdrom_end_request(drive, uptodate);
824 return ide_stopped;
825 } else if (!blk_pc_request(rq)) {
826 ide_cd_request_sense_fixup(drive, rq);
827 /* complain if we still have data left to transfer */
828 uptodate = rq->data_len ? 0 : 1;
829 }
830 goto end_request;
831 }
832
833 /* check which way to transfer data */
834 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
835 return ide_stopped;
836
837 if (blk_fs_request(rq)) {
838 if (write == 0) {
839 int nskip;
840
841 if (ide_cd_check_transfer_size(drive, len)) {
842 cdrom_end_request(drive, 0);
843 return ide_stopped;
844 }
845
846 /*
847 * First, figure out if we need to bit-bucket
848 * any of the leading sectors.
849 */
850 nskip = min_t(int, rq->current_nr_sectors
851 - bio_cur_sectors(rq->bio),
852 thislen >> 9);
853 if (nskip > 0) {
854 ide_pad_transfer(drive, write, nskip << 9);
855 rq->current_nr_sectors -= nskip;
856 thislen -= (nskip << 9);
857 }
858 }
859 }
860
861 if (ireason == 0) {
862 write = 1;
863 xferfunc = hwif->tp_ops->output_data;
864 } else {
865 write = 0;
866 xferfunc = hwif->tp_ops->input_data;
867 }
868
869 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
870 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
871
872 /* transfer data */
873 while (thislen > 0) {
874 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
875 int blen = rq->data_len;
876
877 /* bio backed? */
878 if (rq->bio) {
879 if (blk_fs_request(rq)) {
880 ptr = rq->buffer;
881 blen = rq->current_nr_sectors << 9;
882 } else {
883 ptr = bio_data(rq->bio);
884 blen = bio_iovec(rq->bio)->bv_len;
885 }
886 }
887
888 if (!ptr) {
889 if (blk_fs_request(rq) && !write)
890 /*
891 * If the buffers are full, pipe the rest into
892 * oblivion.
893 */
894 ide_pad_transfer(drive, 0, thislen);
895 else {
896 printk(KERN_ERR PFX "%s: confused, missing data\n",
897 drive->name);
898 blk_dump_rq_flags(rq, rq_data_dir(rq)
899 ? "cdrom_newpc_intr, write"
900 : "cdrom_newpc_intr, read");
901 }
902 break;
903 }
904
905 if (blen > thislen)
906 blen = thislen;
907
908 xferfunc(drive, NULL, ptr, blen);
909
910 thislen -= blen;
911 len -= blen;
912
913 if (blk_fs_request(rq)) {
914 rq->buffer += blen;
915 rq->nr_sectors -= (blen >> 9);
916 rq->current_nr_sectors -= (blen >> 9);
917 rq->sector += (blen >> 9);
918
919 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
920 cdrom_end_request(drive, 1);
921 } else {
922 rq->data_len -= blen;
923
924 /*
925 * The request can't be completed until DRQ is cleared.
926 * So complete the data, but don't complete the request
927 * using the dummy function for the callback feature
928 * of blk_end_request_callback().
929 */
930 if (rq->bio)
931 blk_end_request_callback(rq, 0, blen,
932 cdrom_newpc_intr_dummy_cb);
933 else
934 rq->data += blen;
935 }
936 if (!write && blk_sense_request(rq))
937 rq->sense_len += blen;
938 }
939
940 /* pad, if necessary */
941 if (!blk_fs_request(rq) && len > 0)
942 ide_pad_transfer(drive, write, len);
943
944 if (blk_pc_request(rq)) {
945 timeout = rq->timeout;
946 } else {
947 timeout = ATAPI_WAIT_PC;
948 if (!blk_fs_request(rq))
949 expiry = ide_cd_expiry;
950 }
951
952 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
953 return ide_started;
954
955 end_request:
956 if (blk_pc_request(rq)) {
957 unsigned int dlen = rq->data_len;
958
959 if (dma)
960 rq->data_len = 0;
961
962 if (blk_end_request(rq, 0, dlen))
963 BUG();
964
965 hwif->rq = NULL;
966 } else {
967 if (!uptodate)
968 rq->cmd_flags |= REQ_FAILED;
969 cdrom_end_request(drive, uptodate);
970 }
971 return ide_stopped;
972 }
973
974 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
975 {
976 struct cdrom_info *cd = drive->driver_data;
977 int write = rq_data_dir(rq) == WRITE;
978 unsigned short sectors_per_frame =
979 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
980
981 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
982 "secs_per_frame: %u\n",
983 __func__, rq->cmd[0], write, sectors_per_frame);
984
985 if (write) {
986 /* disk has become write protected */
987 if (get_disk_ro(cd->disk)) {
988 cdrom_end_request(drive, 0);
989 return ide_stopped;
990 }
991 } else {
992 /*
993 * We may be retrying this request after an error. Fix up any
994 * weirdness which might be present in the request packet.
995 */
996 ide_cd_restore_request(drive, rq);
997 }
998
999 /* use DMA, if possible / writes *must* be hardware frame aligned */
1000 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1001 (rq->sector & (sectors_per_frame - 1))) {
1002 if (write) {
1003 cdrom_end_request(drive, 0);
1004 return ide_stopped;
1005 }
1006 drive->dma = 0;
1007 } else
1008 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1009
1010 if (write)
1011 cd->devinfo.media_written = 1;
1012
1013 return ide_started;
1014 }
1015
1016 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1017 {
1018
1019 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1020 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1021 rq->cmd_type);
1022
1023 if (blk_pc_request(rq))
1024 rq->cmd_flags |= REQ_QUIET;
1025 else
1026 rq->cmd_flags &= ~REQ_FAILED;
1027
1028 drive->dma = 0;
1029
1030 /* sg request */
1031 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1032 struct request_queue *q = drive->queue;
1033 unsigned int alignment;
1034 char *buf;
1035
1036 if (rq->bio)
1037 buf = bio_data(rq->bio);
1038 else
1039 buf = rq->data;
1040
1041 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1042
1043 /*
1044 * check if dma is safe
1045 *
1046 * NOTE! The "len" and "addr" checks should possibly have
1047 * separate masks.
1048 */
1049 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1050 if ((unsigned long)buf & alignment
1051 || rq->data_len & q->dma_pad_mask
1052 || object_is_on_stack(buf))
1053 drive->dma = 0;
1054 }
1055 }
1056
1057 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1058 sector_t block)
1059 {
1060 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1061 "rq->cmd_type: 0x%x, block: %llu\n",
1062 __func__, rq->cmd[0], rq->cmd_type,
1063 (unsigned long long)block);
1064
1065 if (blk_fs_request(rq)) {
1066 if (cdrom_start_rw(drive, rq) == ide_stopped)
1067 return ide_stopped;
1068
1069 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1070 return ide_stopped;
1071 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1072 rq->cmd_type == REQ_TYPE_ATA_PC) {
1073 if (!rq->timeout)
1074 rq->timeout = ATAPI_WAIT_PC;
1075
1076 cdrom_do_block_pc(drive, rq);
1077 } else if (blk_special_request(rq)) {
1078 /* right now this can only be a reset... */
1079 cdrom_end_request(drive, 1);
1080 return ide_stopped;
1081 } else {
1082 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1083 cdrom_end_request(drive, 0);
1084 return ide_stopped;
1085 }
1086
1087 return ide_issue_pc(drive);
1088 }
1089
1090 /*
1091 * Ioctl handling.
1092 *
1093 * Routines which queue packet commands take as a final argument a pointer to a
1094 * request_sense struct. If execution of the command results in an error with a
1095 * CHECK CONDITION status, this structure will be filled with the results of the
1096 * subsequent request sense command. The pointer can also be NULL, in which case
1097 * no sense information is returned.
1098 */
1099 static void msf_from_bcd(struct atapi_msf *msf)
1100 {
1101 msf->minute = bcd2bin(msf->minute);
1102 msf->second = bcd2bin(msf->second);
1103 msf->frame = bcd2bin(msf->frame);
1104 }
1105
1106 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1107 {
1108 struct cdrom_info *info = drive->driver_data;
1109 struct cdrom_device_info *cdi = &info->devinfo;
1110 unsigned char cmd[BLK_MAX_CDB];
1111
1112 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1113
1114 memset(cmd, 0, BLK_MAX_CDB);
1115 cmd[0] = GPCMD_TEST_UNIT_READY;
1116
1117 /*
1118 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1119 * instead of supporting the LOAD_UNLOAD opcode.
1120 */
1121 cmd[7] = cdi->sanyo_slot % 3;
1122
1123 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1124 }
1125
1126 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1127 unsigned long *sectors_per_frame,
1128 struct request_sense *sense)
1129 {
1130 struct {
1131 __be32 lba;
1132 __be32 blocklen;
1133 } capbuf;
1134
1135 int stat;
1136 unsigned char cmd[BLK_MAX_CDB];
1137 unsigned len = sizeof(capbuf);
1138 u32 blocklen;
1139
1140 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1141
1142 memset(cmd, 0, BLK_MAX_CDB);
1143 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1144
1145 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1146 REQ_QUIET);
1147 if (stat)
1148 return stat;
1149
1150 /*
1151 * Sanity check the given block size
1152 */
1153 blocklen = be32_to_cpu(capbuf.blocklen);
1154 switch (blocklen) {
1155 case 512:
1156 case 1024:
1157 case 2048:
1158 case 4096:
1159 break;
1160 default:
1161 printk(KERN_ERR PFX "%s: weird block size %u\n",
1162 drive->name, blocklen);
1163 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1164 drive->name);
1165 blocklen = 2048;
1166 break;
1167 }
1168
1169 *capacity = 1 + be32_to_cpu(capbuf.lba);
1170 *sectors_per_frame = blocklen >> SECTOR_BITS;
1171
1172 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1173 __func__, *capacity, *sectors_per_frame);
1174
1175 return 0;
1176 }
1177
1178 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1179 int format, char *buf, int buflen,
1180 struct request_sense *sense)
1181 {
1182 unsigned char cmd[BLK_MAX_CDB];
1183
1184 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1185
1186 memset(cmd, 0, BLK_MAX_CDB);
1187
1188 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1189 cmd[6] = trackno;
1190 cmd[7] = (buflen >> 8);
1191 cmd[8] = (buflen & 0xff);
1192 cmd[9] = (format << 6);
1193
1194 if (msf_flag)
1195 cmd[1] = 2;
1196
1197 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1198 }
1199
1200 /* Try to read the entire TOC for the disk into our internal buffer. */
1201 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1202 {
1203 int stat, ntracks, i;
1204 struct cdrom_info *info = drive->driver_data;
1205 struct cdrom_device_info *cdi = &info->devinfo;
1206 struct atapi_toc *toc = info->toc;
1207 struct {
1208 struct atapi_toc_header hdr;
1209 struct atapi_toc_entry ent;
1210 } ms_tmp;
1211 long last_written;
1212 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1213
1214 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1215
1216 if (toc == NULL) {
1217 /* try to allocate space */
1218 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1219 if (toc == NULL) {
1220 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1221 drive->name);
1222 return -ENOMEM;
1223 }
1224 info->toc = toc;
1225 }
1226
1227 /*
1228 * Check to see if the existing data is still valid. If it is,
1229 * just return.
1230 */
1231 (void) cdrom_check_status(drive, sense);
1232
1233 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1234 return 0;
1235
1236 /* try to get the total cdrom capacity and sector size */
1237 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1238 sense);
1239 if (stat)
1240 toc->capacity = 0x1fffff;
1241
1242 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1243 /* save a private copy of the TOC capacity for error handling */
1244 drive->probed_capacity = toc->capacity * sectors_per_frame;
1245
1246 blk_queue_hardsect_size(drive->queue,
1247 sectors_per_frame << SECTOR_BITS);
1248
1249 /* first read just the header, so we know how long the TOC is */
1250 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1251 sizeof(struct atapi_toc_header), sense);
1252 if (stat)
1253 return stat;
1254
1255 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1256 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1257 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1258 }
1259
1260 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1261 if (ntracks <= 0)
1262 return -EIO;
1263 if (ntracks > MAX_TRACKS)
1264 ntracks = MAX_TRACKS;
1265
1266 /* now read the whole schmeer */
1267 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1268 (char *)&toc->hdr,
1269 sizeof(struct atapi_toc_header) +
1270 (ntracks + 1) *
1271 sizeof(struct atapi_toc_entry), sense);
1272
1273 if (stat && toc->hdr.first_track > 1) {
1274 /*
1275 * Cds with CDI tracks only don't have any TOC entries, despite
1276 * of this the returned values are
1277 * first_track == last_track = number of CDI tracks + 1,
1278 * so that this case is indistinguishable from the same layout
1279 * plus an additional audio track. If we get an error for the
1280 * regular case, we assume a CDI without additional audio
1281 * tracks. In this case the readable TOC is empty (CDI tracks
1282 * are not included) and only holds the Leadout entry.
1283 *
1284 * Heiko Eißfeldt.
1285 */
1286 ntracks = 0;
1287 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1288 (char *)&toc->hdr,
1289 sizeof(struct atapi_toc_header) +
1290 (ntracks + 1) *
1291 sizeof(struct atapi_toc_entry),
1292 sense);
1293 if (stat)
1294 return stat;
1295
1296 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1297 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1298 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1299 } else {
1300 toc->hdr.first_track = CDROM_LEADOUT;
1301 toc->hdr.last_track = CDROM_LEADOUT;
1302 }
1303 }
1304
1305 if (stat)
1306 return stat;
1307
1308 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1309
1310 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1311 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1312 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1313 }
1314
1315 for (i = 0; i <= ntracks; i++) {
1316 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1317 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1318 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1319 msf_from_bcd(&toc->ent[i].addr.msf);
1320 }
1321 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1322 toc->ent[i].addr.msf.second,
1323 toc->ent[i].addr.msf.frame);
1324 }
1325
1326 if (toc->hdr.first_track != CDROM_LEADOUT) {
1327 /* read the multisession information */
1328 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1329 sizeof(ms_tmp), sense);
1330 if (stat)
1331 return stat;
1332
1333 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1334 } else {
1335 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1336 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1337 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1338 }
1339
1340 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1341 /* re-read multisession information using MSF format */
1342 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1343 sizeof(ms_tmp), sense);
1344 if (stat)
1345 return stat;
1346
1347 msf_from_bcd(&ms_tmp.ent.addr.msf);
1348 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1349 ms_tmp.ent.addr.msf.second,
1350 ms_tmp.ent.addr.msf.frame);
1351 }
1352
1353 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1354
1355 /* now try to get the total cdrom capacity */
1356 stat = cdrom_get_last_written(cdi, &last_written);
1357 if (!stat && (last_written > toc->capacity)) {
1358 toc->capacity = last_written;
1359 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1360 drive->probed_capacity = toc->capacity * sectors_per_frame;
1361 }
1362
1363 /* Remember that we've read this stuff. */
1364 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1365
1366 return 0;
1367 }
1368
1369 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1370 {
1371 struct cdrom_info *info = drive->driver_data;
1372 struct cdrom_device_info *cdi = &info->devinfo;
1373 struct packet_command cgc;
1374 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1375
1376 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1377
1378 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1379 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1380
1381 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1382 do {
1383 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1384 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1385 if (!stat)
1386 break;
1387 } while (--attempts);
1388 return stat;
1389 }
1390
1391 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1392 {
1393 struct cdrom_info *cd = drive->driver_data;
1394 u16 curspeed, maxspeed;
1395
1396 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1397
1398 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1399 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1400 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1401 } else {
1402 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1403 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1404 }
1405
1406 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1407 __func__, curspeed, maxspeed);
1408
1409 cd->current_speed = (curspeed + (176/2)) / 176;
1410 cd->max_speed = (maxspeed + (176/2)) / 176;
1411 }
1412
1413 #define IDE_CD_CAPABILITIES \
1414 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1415 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1416 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1417 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1418 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1419
1420 static struct cdrom_device_ops ide_cdrom_dops = {
1421 .open = ide_cdrom_open_real,
1422 .release = ide_cdrom_release_real,
1423 .drive_status = ide_cdrom_drive_status,
1424 .media_changed = ide_cdrom_check_media_change_real,
1425 .tray_move = ide_cdrom_tray_move,
1426 .lock_door = ide_cdrom_lock_door,
1427 .select_speed = ide_cdrom_select_speed,
1428 .get_last_session = ide_cdrom_get_last_session,
1429 .get_mcn = ide_cdrom_get_mcn,
1430 .reset = ide_cdrom_reset,
1431 .audio_ioctl = ide_cdrom_audio_ioctl,
1432 .capability = IDE_CD_CAPABILITIES,
1433 .generic_packet = ide_cdrom_packet,
1434 };
1435
1436 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1437 {
1438 struct cdrom_info *info = drive->driver_data;
1439 struct cdrom_device_info *devinfo = &info->devinfo;
1440
1441 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1442
1443 devinfo->ops = &ide_cdrom_dops;
1444 devinfo->speed = info->current_speed;
1445 devinfo->capacity = nslots;
1446 devinfo->handle = drive;
1447 strcpy(devinfo->name, drive->name);
1448
1449 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1450 devinfo->mask |= CDC_SELECT_SPEED;
1451
1452 devinfo->disk = info->disk;
1453 return register_cdrom(devinfo);
1454 }
1455
1456 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1457 {
1458 struct cdrom_info *cd = drive->driver_data;
1459 struct cdrom_device_info *cdi = &cd->devinfo;
1460 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1461 mechtype_t mechtype;
1462 int nslots = 1;
1463
1464 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1465 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1466 drive->atapi_flags);
1467
1468 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1469 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1470 CDC_MO_DRIVE | CDC_RAM);
1471
1472 if (drive->media == ide_optical) {
1473 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1474 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1475 drive->name);
1476 return nslots;
1477 }
1478
1479 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1480 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1481 cdi->mask &= ~CDC_PLAY_AUDIO;
1482 return nslots;
1483 }
1484
1485 /*
1486 * We have to cheat a little here. the packet will eventually be queued
1487 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1488 * Since this device hasn't been registered with the Uniform layer yet,
1489 * it can't do this. Same goes for cdi->ops.
1490 */
1491 cdi->handle = drive;
1492 cdi->ops = &ide_cdrom_dops;
1493
1494 if (ide_cdrom_get_capabilities(drive, buf))
1495 return 0;
1496
1497 if ((buf[8 + 6] & 0x01) == 0)
1498 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1499 if (buf[8 + 6] & 0x08)
1500 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1501 if (buf[8 + 3] & 0x01)
1502 cdi->mask &= ~CDC_CD_R;
1503 if (buf[8 + 3] & 0x02)
1504 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1505 if (buf[8 + 2] & 0x38)
1506 cdi->mask &= ~CDC_DVD;
1507 if (buf[8 + 3] & 0x20)
1508 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1509 if (buf[8 + 3] & 0x10)
1510 cdi->mask &= ~CDC_DVD_R;
1511 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1512 cdi->mask &= ~CDC_PLAY_AUDIO;
1513
1514 mechtype = buf[8 + 6] >> 5;
1515 if (mechtype == mechtype_caddy ||
1516 mechtype == mechtype_popup ||
1517 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1518 cdi->mask |= CDC_CLOSE_TRAY;
1519
1520 if (cdi->sanyo_slot > 0) {
1521 cdi->mask &= ~CDC_SELECT_DISC;
1522 nslots = 3;
1523 } else if (mechtype == mechtype_individual_changer ||
1524 mechtype == mechtype_cartridge_changer) {
1525 nslots = cdrom_number_of_slots(cdi);
1526 if (nslots > 1)
1527 cdi->mask &= ~CDC_SELECT_DISC;
1528 }
1529
1530 ide_cdrom_update_speed(drive, buf);
1531
1532 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1533
1534 /* don't print speed if the drive reported 0 */
1535 if (cd->max_speed)
1536 printk(KERN_CONT " %dX", cd->max_speed);
1537
1538 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1539
1540 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1541 printk(KERN_CONT " DVD%s%s",
1542 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1543 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1544
1545 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1546 printk(KERN_CONT " CD%s%s",
1547 (cdi->mask & CDC_CD_R) ? "" : "-R",
1548 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1549
1550 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1551 printk(KERN_CONT " changer w/%d slots", nslots);
1552 else
1553 printk(KERN_CONT " drive");
1554
1555 printk(KERN_CONT ", %dkB Cache\n",
1556 be16_to_cpup((__be16 *)&buf[8 + 12]));
1557
1558 return nslots;
1559 }
1560
1561 /* standard prep_rq_fn that builds 10 byte cmds */
1562 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1563 {
1564 int hard_sect = queue_hardsect_size(q);
1565 long block = (long)rq->hard_sector / (hard_sect >> 9);
1566 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1567
1568 memset(rq->cmd, 0, BLK_MAX_CDB);
1569
1570 if (rq_data_dir(rq) == READ)
1571 rq->cmd[0] = GPCMD_READ_10;
1572 else
1573 rq->cmd[0] = GPCMD_WRITE_10;
1574
1575 /*
1576 * fill in lba
1577 */
1578 rq->cmd[2] = (block >> 24) & 0xff;
1579 rq->cmd[3] = (block >> 16) & 0xff;
1580 rq->cmd[4] = (block >> 8) & 0xff;
1581 rq->cmd[5] = block & 0xff;
1582
1583 /*
1584 * and transfer length
1585 */
1586 rq->cmd[7] = (blocks >> 8) & 0xff;
1587 rq->cmd[8] = blocks & 0xff;
1588 rq->cmd_len = 10;
1589 return BLKPREP_OK;
1590 }
1591
1592 /*
1593 * Most of the SCSI commands are supported directly by ATAPI devices.
1594 * This transform handles the few exceptions.
1595 */
1596 static int ide_cdrom_prep_pc(struct request *rq)
1597 {
1598 u8 *c = rq->cmd;
1599
1600 /* transform 6-byte read/write commands to the 10-byte version */
1601 if (c[0] == READ_6 || c[0] == WRITE_6) {
1602 c[8] = c[4];
1603 c[5] = c[3];
1604 c[4] = c[2];
1605 c[3] = c[1] & 0x1f;
1606 c[2] = 0;
1607 c[1] &= 0xe0;
1608 c[0] += (READ_10 - READ_6);
1609 rq->cmd_len = 10;
1610 return BLKPREP_OK;
1611 }
1612
1613 /*
1614 * it's silly to pretend we understand 6-byte sense commands, just
1615 * reject with ILLEGAL_REQUEST and the caller should take the
1616 * appropriate action
1617 */
1618 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1619 rq->errors = ILLEGAL_REQUEST;
1620 return BLKPREP_KILL;
1621 }
1622
1623 return BLKPREP_OK;
1624 }
1625
1626 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1627 {
1628 if (blk_fs_request(rq))
1629 return ide_cdrom_prep_fs(q, rq);
1630 else if (blk_pc_request(rq))
1631 return ide_cdrom_prep_pc(rq);
1632
1633 return 0;
1634 }
1635
1636 struct cd_list_entry {
1637 const char *id_model;
1638 const char *id_firmware;
1639 unsigned int cd_flags;
1640 };
1641
1642 #ifdef CONFIG_IDE_PROC_FS
1643 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1644 {
1645 unsigned long capacity, sectors_per_frame;
1646
1647 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1648 return 0;
1649
1650 return capacity * sectors_per_frame;
1651 }
1652
1653 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1654 int count, int *eof, void *data)
1655 {
1656 ide_drive_t *drive = data;
1657 int len;
1658
1659 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1660 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1661 }
1662
1663 static ide_proc_entry_t idecd_proc[] = {
1664 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1665 { NULL, 0, NULL, NULL }
1666 };
1667
1668 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1669 {
1670 return idecd_proc;
1671 }
1672
1673 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1674 {
1675 return NULL;
1676 }
1677 #endif
1678
1679 static const struct cd_list_entry ide_cd_quirks_list[] = {
1680 /* Limit transfer size per interrupt. */
1681 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1682 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1683 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1684 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1685 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1686 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1687 IDE_AFLAG_PRE_ATAPI12, },
1688 /* Vertos 300, some versions of this drive like to talk BCD. */
1689 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1690 /* Vertos 600 ESD. */
1691 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1692 /*
1693 * Sanyo 3 CD changer uses a non-standard command for CD changing
1694 * (by default standard ATAPI support for CD changers is used).
1695 */
1696 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1697 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1698 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1699 /* Stingray 8X CD-ROM. */
1700 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1701 /*
1702 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1703 * mode sense page capabilities size, but older drives break.
1704 */
1705 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1706 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1707 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1708 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1709 /*
1710 * Some drives used by Apple don't advertise audio play
1711 * but they do support reading TOC & audio datas.
1712 */
1713 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1714 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1715 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1716 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1717 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1718 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1719 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1720 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1721 { NULL, NULL, 0 }
1722 };
1723
1724 static unsigned int ide_cd_flags(u16 *id)
1725 {
1726 const struct cd_list_entry *cle = ide_cd_quirks_list;
1727
1728 while (cle->id_model) {
1729 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1730 (cle->id_firmware == NULL ||
1731 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1732 return cle->cd_flags;
1733 cle++;
1734 }
1735
1736 return 0;
1737 }
1738
1739 static int ide_cdrom_setup(ide_drive_t *drive)
1740 {
1741 struct cdrom_info *cd = drive->driver_data;
1742 struct cdrom_device_info *cdi = &cd->devinfo;
1743 u16 *id = drive->id;
1744 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1745 int nslots;
1746
1747 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1748
1749 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1750 blk_queue_dma_alignment(drive->queue, 31);
1751 blk_queue_update_dma_pad(drive->queue, 15);
1752 drive->queue->unplug_delay = (1 * HZ) / 1000;
1753 if (!drive->queue->unplug_delay)
1754 drive->queue->unplug_delay = 1;
1755
1756 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1757 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1758
1759 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1760 fw_rev[4] == '1' && fw_rev[6] <= '2')
1761 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1762 IDE_AFLAG_TOCADDR_AS_BCD);
1763 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1764 fw_rev[4] == '1' && fw_rev[6] <= '2')
1765 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1766 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1767 /* 3 => use CD in slot 0 */
1768 cdi->sanyo_slot = 3;
1769
1770 nslots = ide_cdrom_probe_capabilities(drive);
1771
1772 /* set correct block size */
1773 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1774
1775 if (ide_cdrom_register(drive, nslots)) {
1776 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1777 " cdrom driver.\n", drive->name, __func__);
1778 cd->devinfo.handle = NULL;
1779 return 1;
1780 }
1781
1782 ide_proc_register_driver(drive, cd->driver);
1783 return 0;
1784 }
1785
1786 static void ide_cd_remove(ide_drive_t *drive)
1787 {
1788 struct cdrom_info *info = drive->driver_data;
1789
1790 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1791
1792 ide_proc_unregister_driver(drive, info->driver);
1793
1794 del_gendisk(info->disk);
1795
1796 ide_cd_put(info);
1797 }
1798
1799 static void ide_cd_release(struct kref *kref)
1800 {
1801 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1802 struct cdrom_device_info *devinfo = &info->devinfo;
1803 ide_drive_t *drive = info->drive;
1804 struct gendisk *g = info->disk;
1805
1806 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1807
1808 kfree(info->toc);
1809 if (devinfo->handle == drive)
1810 unregister_cdrom(devinfo);
1811 drive->driver_data = NULL;
1812 blk_queue_prep_rq(drive->queue, NULL);
1813 g->private_data = NULL;
1814 put_disk(g);
1815 kfree(info);
1816 }
1817
1818 static int ide_cd_probe(ide_drive_t *);
1819
1820 static struct ide_driver ide_cdrom_driver = {
1821 .gen_driver = {
1822 .owner = THIS_MODULE,
1823 .name = "ide-cdrom",
1824 .bus = &ide_bus_type,
1825 },
1826 .probe = ide_cd_probe,
1827 .remove = ide_cd_remove,
1828 .version = IDECD_VERSION,
1829 .do_request = ide_cd_do_request,
1830 .end_request = ide_end_request,
1831 #ifdef CONFIG_IDE_PROC_FS
1832 .proc_entries = ide_cd_proc_entries,
1833 .proc_devsets = ide_cd_proc_devsets,
1834 #endif
1835 };
1836
1837 static int idecd_open(struct block_device *bdev, fmode_t mode)
1838 {
1839 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1840 int rc = -ENOMEM;
1841
1842 if (!info)
1843 return -ENXIO;
1844
1845 rc = cdrom_open(&info->devinfo, bdev, mode);
1846
1847 if (rc < 0)
1848 ide_cd_put(info);
1849
1850 return rc;
1851 }
1852
1853 static int idecd_release(struct gendisk *disk, fmode_t mode)
1854 {
1855 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1856
1857 cdrom_release(&info->devinfo, mode);
1858
1859 ide_cd_put(info);
1860
1861 return 0;
1862 }
1863
1864 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1865 {
1866 struct packet_command cgc;
1867 char buffer[16];
1868 int stat;
1869 char spindown;
1870
1871 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1872 return -EFAULT;
1873
1874 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1875
1876 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1877 if (stat)
1878 return stat;
1879
1880 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1881 return cdrom_mode_select(cdi, &cgc);
1882 }
1883
1884 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1885 {
1886 struct packet_command cgc;
1887 char buffer[16];
1888 int stat;
1889 char spindown;
1890
1891 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1892
1893 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1894 if (stat)
1895 return stat;
1896
1897 spindown = buffer[11] & 0x0f;
1898 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1899 return -EFAULT;
1900 return 0;
1901 }
1902
1903 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1904 unsigned int cmd, unsigned long arg)
1905 {
1906 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1907 int err;
1908
1909 switch (cmd) {
1910 case CDROMSETSPINDOWN:
1911 return idecd_set_spindown(&info->devinfo, arg);
1912 case CDROMGETSPINDOWN:
1913 return idecd_get_spindown(&info->devinfo, arg);
1914 default:
1915 break;
1916 }
1917
1918 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1919 if (err == -EINVAL)
1920 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1921
1922 return err;
1923 }
1924
1925 static int idecd_media_changed(struct gendisk *disk)
1926 {
1927 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1928 return cdrom_media_changed(&info->devinfo);
1929 }
1930
1931 static int idecd_revalidate_disk(struct gendisk *disk)
1932 {
1933 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1934 struct request_sense sense;
1935
1936 ide_cd_read_toc(info->drive, &sense);
1937
1938 return 0;
1939 }
1940
1941 static struct block_device_operations idecd_ops = {
1942 .owner = THIS_MODULE,
1943 .open = idecd_open,
1944 .release = idecd_release,
1945 .locked_ioctl = idecd_ioctl,
1946 .media_changed = idecd_media_changed,
1947 .revalidate_disk = idecd_revalidate_disk
1948 };
1949
1950 /* module options */
1951 static char *ignore;
1952 module_param(ignore, charp, 0400);
1953
1954 static unsigned long debug_mask;
1955 module_param(debug_mask, ulong, 0644);
1956
1957 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1958
1959 static int ide_cd_probe(ide_drive_t *drive)
1960 {
1961 struct cdrom_info *info;
1962 struct gendisk *g;
1963 struct request_sense sense;
1964
1965 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
1966 "drive->media: 0x%x\n", __func__, drive->driver_req,
1967 drive->media);
1968
1969 if (!strstr("ide-cdrom", drive->driver_req))
1970 goto failed;
1971
1972 if (drive->media != ide_cdrom && drive->media != ide_optical)
1973 goto failed;
1974
1975 /* skip drives that we were told to ignore */
1976 if (ignore != NULL) {
1977 if (strstr(ignore, drive->name)) {
1978 printk(KERN_INFO PFX "ignoring drive %s\n",
1979 drive->name);
1980 goto failed;
1981 }
1982 }
1983
1984 drive->debug_mask = debug_mask;
1985 drive->irq_handler = cdrom_newpc_intr;
1986
1987 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1988 if (info == NULL) {
1989 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1990 drive->name);
1991 goto failed;
1992 }
1993
1994 g = alloc_disk(1 << PARTN_BITS);
1995 if (!g)
1996 goto out_free_cd;
1997
1998 ide_init_disk(g, drive);
1999
2000 kref_init(&info->kref);
2001
2002 info->drive = drive;
2003 info->driver = &ide_cdrom_driver;
2004 info->disk = g;
2005
2006 g->private_data = &info->driver;
2007
2008 drive->driver_data = info;
2009
2010 g->minors = 1;
2011 g->driverfs_dev = &drive->gendev;
2012 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2013 if (ide_cdrom_setup(drive)) {
2014 ide_cd_release(&info->kref);
2015 goto failed;
2016 }
2017
2018 ide_cd_read_toc(drive, &sense);
2019 g->fops = &idecd_ops;
2020 g->flags |= GENHD_FL_REMOVABLE;
2021 add_disk(g);
2022 return 0;
2023
2024 out_free_cd:
2025 kfree(info);
2026 failed:
2027 return -ENODEV;
2028 }
2029
2030 static void __exit ide_cdrom_exit(void)
2031 {
2032 driver_unregister(&ide_cdrom_driver.gen_driver);
2033 }
2034
2035 static int __init ide_cdrom_init(void)
2036 {
2037 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2038 return driver_register(&ide_cdrom_driver.gen_driver);
2039 }
2040
2041 MODULE_ALIAS("ide:*m-cdrom*");
2042 MODULE_ALIAS("ide-cd");
2043 module_init(ide_cdrom_init);
2044 module_exit(ide_cdrom_exit);
2045 MODULE_LICENSE("GPL");
linux 2.6 git repository for openrd