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ide-cd: use ide_end_rq() also for failed non-fs requests
[linux-2.6/mini2440.git] / drivers / ide / ide-cd.c
blob6f64fb2f63d0eab571add20dbfbe0f431b80208d
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 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 get_device(&cd->dev);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 put_device(&cd->dev);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 switch (sense->sense_key) {
106 case NO_SENSE:
107 case RECOVERED_ERROR:
108 break;
109 case NOT_READY:
110 /*
111 * don't care about tray state messages for e.g. capacity
112 * commands or in-progress or becoming ready
113 */
114 if (sense->asc == 0x3a || sense->asc == 0x04)
115 break;
116 log = 1;
117 break;
118 case ILLEGAL_REQUEST:
119 /*
120 * don't log START_STOP unit with LoEj set, since we cannot
121 * reliably check if drive can auto-close
122 */
123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124 break;
125 log = 1;
126 break;
127 case UNIT_ATTENTION:
128 /*
129 * Make good and sure we've seen this potential media change.
130 * Some drives (i.e. Creative) fail to present the correct sense
131 * key in the error register.
132 */
133 cdrom_saw_media_change(drive);
134 break;
135 default:
136 log = 1;
137 break;
138 }
139 return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143 struct request *failed_command,
144 struct request_sense *sense)
145 {
146 unsigned long sector;
147 unsigned long bio_sectors;
148 struct cdrom_info *info = drive->driver_data;
149
150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151 sense->error_code, sense->sense_key);
152
153 if (failed_command)
154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155 failed_command->cmd[0]);
156
157 if (!cdrom_log_sense(drive, failed_command, sense))
158 return;
159
160 /*
161 * If a read toc is executed for a CD-R or CD-RW medium where the first
162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163 * confusing error)
164 */
165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167 return;
168
169 /* current error */
170 if (sense->error_code == 0x70) {
171 switch (sense->sense_key) {
172 case MEDIUM_ERROR:
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
175 if (!sense->valid)
176 break;
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
179 break;
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
184
185 if (drive->queue->hardsect_size == 2048)
186 /* device sector size is 2K */
187 sector <<= 2;
188
189 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190 sector &= ~(bio_sectors - 1);
191
192 /*
193 * The SCSI specification allows for the value
194 * returned by READ CAPACITY to be up to 75 2K
195 * sectors past the last readable block.
196 * Therefore, if we hit a medium error within the
197 * last 75 2K sectors, we decrease the saved size
198 * value.
199 */
200 if (sector < get_capacity(info->disk) &&
201 drive->probed_capacity - sector < 4 * 75)
202 set_capacity(info->disk, sector);
203 }
204 }
205
206 ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
210 struct request *failed_command)
211 {
212 struct cdrom_info *info = drive->driver_data;
213 struct request *rq = &drive->request_sense_rq;
214
215 ide_debug_log(IDE_DBG_SENSE, "enter");
216
217 if (sense == NULL)
218 sense = &info->sense_data;
219
220 /* stuff the sense request in front of our current request */
221 blk_rq_init(NULL, rq);
222 rq->cmd_type = REQ_TYPE_ATA_PC;
223 rq->rq_disk = info->disk;
224
225 rq->data = sense;
226 rq->cmd[0] = GPCMD_REQUEST_SENSE;
227 rq->cmd[4] = 18;
228 rq->data_len = 18;
229
230 rq->cmd_type = REQ_TYPE_SENSE;
231 rq->cmd_flags |= REQ_PREEMPT;
232
233 /* NOTE! Save the failed command in "rq->buffer" */
234 rq->buffer = (void *) failed_command;
235
236 if (failed_command)
237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
238 failed_command->cmd[0]);
239
240 drive->hwif->rq = NULL;
241
242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
243 }
244
245 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
246 {
247 struct request *rq = drive->hwif->rq;
248 int nsectors = rq->hard_cur_sectors;
249
250 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
251 rq->cmd[0], uptodate, nsectors);
252
253 if (blk_sense_request(rq) && uptodate) {
254 /*
255 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
256 * failed request
257 */
258 struct request *failed = (struct request *) rq->buffer;
259 struct cdrom_info *info = drive->driver_data;
260 void *sense = &info->sense_data;
261
262 if (failed) {
263 if (failed->sense) {
264 sense = failed->sense;
265 failed->sense_len = rq->sense_len;
266 }
267 cdrom_analyze_sense_data(drive, failed, sense);
268
269 if (ide_end_rq(drive, failed, -EIO,
270 blk_rq_bytes(failed)))
271 BUG();
272 } else
273 cdrom_analyze_sense_data(drive, NULL, sense);
274 }
275
276 if (!rq->current_nr_sectors && blk_fs_request(rq))
277 uptodate = 1;
278 /* make sure it's fully ended */
279 if (blk_pc_request(rq))
280 nsectors = (rq->data_len + 511) >> 9;
281 if (!nsectors)
282 nsectors = 1;
283
284 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
285 uptodate, nsectors);
286
287 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
288 rq->errors = -EIO;
289
290 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
291 }
292
293 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
294 {
295 if (st & 0x80)
296 return;
297 ide_dump_status(drive, msg, st);
298 }
299
300 /*
301 * Returns:
302 * 0: if the request should be continued.
303 * 1: if the request was ended.
304 */
305 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
306 {
307 ide_hwif_t *hwif = drive->hwif;
308 struct request *rq = hwif->rq;
309 int stat, err, sense_key;
310
311 /* check for errors */
312 stat = hwif->tp_ops->read_status(hwif);
313
314 if (stat_ret)
315 *stat_ret = stat;
316
317 if (OK_STAT(stat, good_stat, BAD_R_STAT))
318 return 0;
319
320 /* get the IDE error register */
321 err = ide_read_error(drive);
322 sense_key = err >> 4;
323
324 if (rq == NULL) {
325 printk(KERN_ERR PFX "%s: missing rq in %s\n",
326 drive->name, __func__);
327 return 1;
328 }
329
330 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
331 "rq->cmd_type: 0x%x, err: 0x%x",
332 stat, good_stat, rq->cmd[0], rq->cmd_type,
333 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, "ireason: 0x%x, rw: 0x%x", ireason, rw);
524
525 /*
526 * ireason == 0: the drive wants to receive data from us
527 * ireason == 2: the drive is expecting to transfer data to us
528 */
529 if (ireason == (!rw << 1))
530 return 0;
531 else if (ireason == (rw << 1)) {
532
533 /* whoops... */
534 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
535 drive->name, __func__);
536
537 ide_pad_transfer(drive, rw, len);
538 } else if (rw == 0 && ireason == 1) {
539 /*
540 * Some drives (ASUS) seem to tell us that status info is
541 * available. Just get it and ignore.
542 */
543 (void)hwif->tp_ops->read_status(hwif);
544 return 0;
545 } else {
546 /* drive wants a command packet, or invalid ireason... */
547 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
548 drive->name, __func__, ireason);
549 }
550
551 if (rq->cmd_type == REQ_TYPE_ATA_PC)
552 rq->cmd_flags |= REQ_FAILED;
553
554 cdrom_end_request(drive, 0);
555 return -1;
556 }
557
558 /*
559 * Assume that the drive will always provide data in multiples of at least
560 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
561 */
562 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
563 {
564 ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
565
566 if ((len % SECTOR_SIZE) == 0)
567 return 0;
568
569 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
570 __func__, len);
571
572 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
573 printk(KERN_ERR PFX "This drive is not supported by this "
574 "version of the driver\n");
575 else {
576 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
577 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
578 }
579
580 return 1;
581 }
582
583 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
584 struct request *rq)
585 {
586 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
587
588 if (rq_data_dir(rq) == READ) {
589 unsigned short sectors_per_frame =
590 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
591 int nskip = rq->sector & (sectors_per_frame - 1);
592
593 /*
594 * If the requested sector doesn't start on a frame boundary,
595 * we must adjust the start of the transfer so that it does,
596 * and remember to skip the first few sectors.
597 *
598 * If the rq->current_nr_sectors field is larger than the size
599 * of the buffer, it will mean that we're to skip a number of
600 * sectors equal to the amount by which rq->current_nr_sectors
601 * is larger than the buffer size.
602 */
603 if (nskip > 0) {
604 /* sanity check... */
605 if (rq->current_nr_sectors !=
606 bio_cur_sectors(rq->bio)) {
607 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
608 drive->name, __func__,
609 rq->current_nr_sectors);
610 cdrom_end_request(drive, 0);
611 return ide_stopped;
612 }
613 rq->current_nr_sectors += nskip;
614 }
615 }
616
617 /* set up the command */
618 rq->timeout = ATAPI_WAIT_PC;
619
620 return ide_started;
621 }
622
623 /*
624 * Fix up a possibly partially-processed request so that we can start it over
625 * entirely, or even put it back on the request queue.
626 */
627 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
628 {
629
630 ide_debug_log(IDE_DBG_FUNC, "enter");
631
632 if (rq->buffer != bio_data(rq->bio)) {
633 sector_t n =
634 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
635
636 rq->buffer = bio_data(rq->bio);
637 rq->nr_sectors += n;
638 rq->sector -= n;
639 }
640 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
641 rq->hard_cur_sectors = rq->current_nr_sectors;
642 rq->hard_nr_sectors = rq->nr_sectors;
643 rq->hard_sector = rq->sector;
644 rq->q->prep_rq_fn(rq->q, rq);
645 }
646
647 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
648 {
649 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
650
651 /*
652 * Some of the trailing request sense fields are optional,
653 * and some drives don't send them. Sigh.
654 */
655 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
656 rq->data_len > 0 && rq->data_len <= 5)
657 while (rq->data_len > 0) {
658 *(u8 *)rq->data++ = 0;
659 --rq->data_len;
660 }
661 }
662
663 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
664 int write, void *buffer, unsigned *bufflen,
665 struct request_sense *sense, int timeout,
666 unsigned int cmd_flags)
667 {
668 struct cdrom_info *info = drive->driver_data;
669 struct request_sense local_sense;
670 int retries = 10;
671 unsigned int flags = 0;
672
673 if (!sense)
674 sense = &local_sense;
675
676 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
677 "cmd_flags: 0x%x",
678 cmd[0], write, timeout, cmd_flags);
679
680 /* start of retry loop */
681 do {
682 struct request *rq;
683 int error;
684
685 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
686
687 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
688 rq->cmd_type = REQ_TYPE_ATA_PC;
689 rq->sense = sense;
690 rq->cmd_flags |= cmd_flags;
691 rq->timeout = timeout;
692 if (buffer) {
693 rq->data = buffer;
694 rq->data_len = *bufflen;
695 }
696
697 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
698
699 if (buffer)
700 *bufflen = rq->data_len;
701
702 flags = rq->cmd_flags;
703 blk_put_request(rq);
704
705 /*
706 * FIXME: we should probably abort/retry or something in case of
707 * failure.
708 */
709 if (flags & REQ_FAILED) {
710 /*
711 * The request failed. Retry if it was due to a unit
712 * attention status (usually means media was changed).
713 */
714 struct request_sense *reqbuf = sense;
715
716 if (reqbuf->sense_key == UNIT_ATTENTION)
717 cdrom_saw_media_change(drive);
718 else if (reqbuf->sense_key == NOT_READY &&
719 reqbuf->asc == 4 && reqbuf->ascq != 4) {
720 /*
721 * The drive is in the process of loading
722 * a disk. Retry, but wait a little to give
723 * the drive time to complete the load.
724 */
725 ssleep(2);
726 } else {
727 /* otherwise, don't retry */
728 retries = 0;
729 }
730 --retries;
731 }
732
733 /* end of retry loop */
734 } while ((flags & REQ_FAILED) && retries >= 0);
735
736 /* return an error if the command failed */
737 return (flags & REQ_FAILED) ? -EIO : 0;
738 }
739
740 /*
741 * Called from blk_end_request_callback() after the data of the request is
742 * completed and before the request itself is completed. By returning value '1',
743 * blk_end_request_callback() returns immediately without completing it.
744 */
745 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
746 {
747 return 1;
748 }
749
750 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
751 {
752 ide_hwif_t *hwif = drive->hwif;
753 struct request *rq = hwif->rq;
754 xfer_func_t *xferfunc;
755 ide_expiry_t *expiry = NULL;
756 int dma_error = 0, dma, stat, thislen, uptodate = 0;
757 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
758 unsigned int timeout;
759 u16 len;
760 u8 ireason;
761
762 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
763 rq->cmd[0], write);
764
765 /* check for errors */
766 dma = drive->dma;
767 if (dma) {
768 drive->dma = 0;
769 dma_error = hwif->dma_ops->dma_end(drive);
770 if (dma_error) {
771 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
772 write ? "write" : "read");
773 ide_dma_off(drive);
774 }
775 }
776
777 if (cdrom_decode_status(drive, 0, &stat))
778 return ide_stopped;
779
780 /* using dma, transfer is complete now */
781 if (dma) {
782 if (dma_error)
783 return ide_error(drive, "dma error", stat);
784 if (blk_fs_request(rq)) {
785 ide_complete_rq(drive, 0, rq->nr_sectors
786 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
787 return ide_stopped;
788 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
789 ide_complete_rq(drive, 0, 512);
790 return ide_stopped;
791 }
792 goto end_request;
793 }
794
795 ide_read_bcount_and_ireason(drive, &len, &ireason);
796
797 thislen = blk_fs_request(rq) ? len : rq->data_len;
798 if (thislen > len)
799 thislen = len;
800
801 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
802 stat, thislen);
803
804 /* If DRQ is clear, the command has completed. */
805 if ((stat & ATA_DRQ) == 0) {
806 if (blk_fs_request(rq)) {
807 /*
808 * If we're not done reading/writing, complain.
809 * Otherwise, complete the command normally.
810 */
811 uptodate = 1;
812 if (rq->current_nr_sectors > 0) {
813 printk(KERN_ERR PFX "%s: %s: data underrun "
814 "(%d blocks)\n",
815 drive->name, __func__,
816 rq->current_nr_sectors);
817 if (!write)
818 rq->cmd_flags |= REQ_FAILED;
819 uptodate = 0;
820 }
821 cdrom_end_request(drive, uptodate);
822 return ide_stopped;
823 } else if (!blk_pc_request(rq)) {
824 ide_cd_request_sense_fixup(drive, rq);
825 /* complain if we still have data left to transfer */
826 uptodate = rq->data_len ? 0 : 1;
827 }
828 goto end_request;
829 }
830
831 /* check which way to transfer data */
832 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
833 return ide_stopped;
834
835 if (blk_fs_request(rq)) {
836 if (write == 0) {
837 int nskip;
838
839 if (ide_cd_check_transfer_size(drive, len)) {
840 cdrom_end_request(drive, 0);
841 return ide_stopped;
842 }
843
844 /*
845 * First, figure out if we need to bit-bucket
846 * any of the leading sectors.
847 */
848 nskip = min_t(int, rq->current_nr_sectors
849 - bio_cur_sectors(rq->bio),
850 thislen >> 9);
851 if (nskip > 0) {
852 ide_pad_transfer(drive, write, nskip << 9);
853 rq->current_nr_sectors -= nskip;
854 thislen -= (nskip << 9);
855 }
856 }
857 }
858
859 if (ireason == 0) {
860 write = 1;
861 xferfunc = hwif->tp_ops->output_data;
862 } else {
863 write = 0;
864 xferfunc = hwif->tp_ops->input_data;
865 }
866
867 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
868 "ireason: 0x%x",
869 rq->cmd_type, ireason);
870
871 /* transfer data */
872 while (thislen > 0) {
873 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
874 int blen = rq->data_len;
875
876 /* bio backed? */
877 if (rq->bio) {
878 if (blk_fs_request(rq)) {
879 ptr = rq->buffer;
880 blen = rq->current_nr_sectors << 9;
881 } else {
882 ptr = bio_data(rq->bio);
883 blen = bio_iovec(rq->bio)->bv_len;
884 }
885 }
886
887 if (!ptr) {
888 if (blk_fs_request(rq) && !write)
889 /*
890 * If the buffers are full, pipe the rest into
891 * oblivion.
892 */
893 ide_pad_transfer(drive, 0, thislen);
894 else {
895 printk(KERN_ERR PFX "%s: confused, missing data\n",
896 drive->name);
897 blk_dump_rq_flags(rq, rq_data_dir(rq)
898 ? "cdrom_newpc_intr, write"
899 : "cdrom_newpc_intr, read");
900 }
901 break;
902 }
903
904 if (blen > thislen)
905 blen = thislen;
906
907 xferfunc(drive, NULL, ptr, blen);
908
909 thislen -= blen;
910 len -= blen;
911
912 if (blk_fs_request(rq)) {
913 rq->buffer += blen;
914 rq->nr_sectors -= (blen >> 9);
915 rq->current_nr_sectors -= (blen >> 9);
916 rq->sector += (blen >> 9);
917
918 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
919 cdrom_end_request(drive, 1);
920 } else {
921 rq->data_len -= blen;
922
923 /*
924 * The request can't be completed until DRQ is cleared.
925 * So complete the data, but don't complete the request
926 * using the dummy function for the callback feature
927 * of blk_end_request_callback().
928 */
929 if (rq->bio)
930 blk_end_request_callback(rq, 0, blen,
931 cdrom_newpc_intr_dummy_cb);
932 else
933 rq->data += blen;
934 }
935 if (!write && blk_sense_request(rq))
936 rq->sense_len += blen;
937 }
938
939 /* pad, if necessary */
940 if (!blk_fs_request(rq) && len > 0)
941 ide_pad_transfer(drive, write, len);
942
943 if (blk_pc_request(rq)) {
944 timeout = rq->timeout;
945 } else {
946 timeout = ATAPI_WAIT_PC;
947 if (!blk_fs_request(rq))
948 expiry = ide_cd_expiry;
949 }
950
951 hwif->expiry = expiry;
952 ide_set_handler(drive, cdrom_newpc_intr, timeout);
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, "rq->cmd[0]: 0x%x, write: 0x%x, "
982 "secs_per_frame: %u",
983 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, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1020 rq->cmd[0], rq->cmd_type);
1021
1022 if (blk_pc_request(rq))
1023 rq->cmd_flags |= REQ_QUIET;
1024 else
1025 rq->cmd_flags &= ~REQ_FAILED;
1026
1027 drive->dma = 0;
1028
1029 /* sg request */
1030 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1031 struct request_queue *q = drive->queue;
1032 unsigned int alignment;
1033 char *buf;
1034
1035 if (rq->bio)
1036 buf = bio_data(rq->bio);
1037 else
1038 buf = rq->data;
1039
1040 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1041
1042 /*
1043 * check if dma is safe
1044 *
1045 * NOTE! The "len" and "addr" checks should possibly have
1046 * separate masks.
1047 */
1048 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1049 if ((unsigned long)buf & alignment
1050 || rq->data_len & q->dma_pad_mask
1051 || object_is_on_stack(buf))
1052 drive->dma = 0;
1053 }
1054 }
1055
1056 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1057 sector_t block)
1058 {
1059 struct ide_cmd cmd;
1060
1061 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1062 rq->cmd[0], (unsigned long long)block);
1063
1064 if (drive->debug_mask & IDE_DBG_RQ)
1065 blk_dump_rq_flags(rq, "ide_cd_do_request");
1066
1067 if (blk_fs_request(rq)) {
1068 if (cdrom_start_rw(drive, rq) == ide_stopped)
1069 return ide_stopped;
1070
1071 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1072 return ide_stopped;
1073 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1074 rq->cmd_type == REQ_TYPE_ATA_PC) {
1075 if (!rq->timeout)
1076 rq->timeout = ATAPI_WAIT_PC;
1077
1078 cdrom_do_block_pc(drive, rq);
1079 } else if (blk_special_request(rq)) {
1080 /* right now this can only be a reset... */
1081 cdrom_end_request(drive, 1);
1082 return ide_stopped;
1083 } else {
1084 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1085 cdrom_end_request(drive, 0);
1086 return ide_stopped;
1087 }
1088
1089 memset(&cmd, 0, sizeof(cmd));
1090
1091 if (rq_data_dir(rq))
1092 cmd.tf_flags |= IDE_TFLAG_WRITE;
1093
1094 cmd.rq = rq;
1095
1096 return ide_issue_pc(drive, &cmd);
1097 }
1098
1099 /*
1100 * Ioctl handling.
1101 *
1102 * Routines which queue packet commands take as a final argument a pointer to a
1103 * request_sense struct. If execution of the command results in an error with a
1104 * CHECK CONDITION status, this structure will be filled with the results of the
1105 * subsequent request sense command. The pointer can also be NULL, in which case
1106 * no sense information is returned.
1107 */
1108 static void msf_from_bcd(struct atapi_msf *msf)
1109 {
1110 msf->minute = bcd2bin(msf->minute);
1111 msf->second = bcd2bin(msf->second);
1112 msf->frame = bcd2bin(msf->frame);
1113 }
1114
1115 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1116 {
1117 struct cdrom_info *info = drive->driver_data;
1118 struct cdrom_device_info *cdi = &info->devinfo;
1119 unsigned char cmd[BLK_MAX_CDB];
1120
1121 ide_debug_log(IDE_DBG_FUNC, "enter");
1122
1123 memset(cmd, 0, BLK_MAX_CDB);
1124 cmd[0] = GPCMD_TEST_UNIT_READY;
1125
1126 /*
1127 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1128 * instead of supporting the LOAD_UNLOAD opcode.
1129 */
1130 cmd[7] = cdi->sanyo_slot % 3;
1131
1132 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1133 }
1134
1135 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1136 unsigned long *sectors_per_frame,
1137 struct request_sense *sense)
1138 {
1139 struct {
1140 __be32 lba;
1141 __be32 blocklen;
1142 } capbuf;
1143
1144 int stat;
1145 unsigned char cmd[BLK_MAX_CDB];
1146 unsigned len = sizeof(capbuf);
1147 u32 blocklen;
1148
1149 ide_debug_log(IDE_DBG_FUNC, "enter");
1150
1151 memset(cmd, 0, BLK_MAX_CDB);
1152 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1153
1154 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1155 REQ_QUIET);
1156 if (stat)
1157 return stat;
1158
1159 /*
1160 * Sanity check the given block size
1161 */
1162 blocklen = be32_to_cpu(capbuf.blocklen);
1163 switch (blocklen) {
1164 case 512:
1165 case 1024:
1166 case 2048:
1167 case 4096:
1168 break;
1169 default:
1170 printk(KERN_ERR PFX "%s: weird block size %u\n",
1171 drive->name, blocklen);
1172 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1173 drive->name);
1174 blocklen = 2048;
1175 break;
1176 }
1177
1178 *capacity = 1 + be32_to_cpu(capbuf.lba);
1179 *sectors_per_frame = blocklen >> SECTOR_BITS;
1180
1181 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1182 *capacity, *sectors_per_frame);
1183
1184 return 0;
1185 }
1186
1187 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1188 int format, char *buf, int buflen,
1189 struct request_sense *sense)
1190 {
1191 unsigned char cmd[BLK_MAX_CDB];
1192
1193 ide_debug_log(IDE_DBG_FUNC, "enter");
1194
1195 memset(cmd, 0, BLK_MAX_CDB);
1196
1197 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1198 cmd[6] = trackno;
1199 cmd[7] = (buflen >> 8);
1200 cmd[8] = (buflen & 0xff);
1201 cmd[9] = (format << 6);
1202
1203 if (msf_flag)
1204 cmd[1] = 2;
1205
1206 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1207 }
1208
1209 /* Try to read the entire TOC for the disk into our internal buffer. */
1210 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1211 {
1212 int stat, ntracks, i;
1213 struct cdrom_info *info = drive->driver_data;
1214 struct cdrom_device_info *cdi = &info->devinfo;
1215 struct atapi_toc *toc = info->toc;
1216 struct {
1217 struct atapi_toc_header hdr;
1218 struct atapi_toc_entry ent;
1219 } ms_tmp;
1220 long last_written;
1221 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1222
1223 ide_debug_log(IDE_DBG_FUNC, "enter");
1224
1225 if (toc == NULL) {
1226 /* try to allocate space */
1227 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1228 if (toc == NULL) {
1229 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1230 drive->name);
1231 return -ENOMEM;
1232 }
1233 info->toc = toc;
1234 }
1235
1236 /*
1237 * Check to see if the existing data is still valid. If it is,
1238 * just return.
1239 */
1240 (void) cdrom_check_status(drive, sense);
1241
1242 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1243 return 0;
1244
1245 /* try to get the total cdrom capacity and sector size */
1246 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1247 sense);
1248 if (stat)
1249 toc->capacity = 0x1fffff;
1250
1251 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1252 /* save a private copy of the TOC capacity for error handling */
1253 drive->probed_capacity = toc->capacity * sectors_per_frame;
1254
1255 blk_queue_hardsect_size(drive->queue,
1256 sectors_per_frame << SECTOR_BITS);
1257
1258 /* first read just the header, so we know how long the TOC is */
1259 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1260 sizeof(struct atapi_toc_header), sense);
1261 if (stat)
1262 return stat;
1263
1264 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1265 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1266 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1267 }
1268
1269 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1270 if (ntracks <= 0)
1271 return -EIO;
1272 if (ntracks > MAX_TRACKS)
1273 ntracks = MAX_TRACKS;
1274
1275 /* now read the whole schmeer */
1276 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1277 (char *)&toc->hdr,
1278 sizeof(struct atapi_toc_header) +
1279 (ntracks + 1) *
1280 sizeof(struct atapi_toc_entry), sense);
1281
1282 if (stat && toc->hdr.first_track > 1) {
1283 /*
1284 * Cds with CDI tracks only don't have any TOC entries, despite
1285 * of this the returned values are
1286 * first_track == last_track = number of CDI tracks + 1,
1287 * so that this case is indistinguishable from the same layout
1288 * plus an additional audio track. If we get an error for the
1289 * regular case, we assume a CDI without additional audio
1290 * tracks. In this case the readable TOC is empty (CDI tracks
1291 * are not included) and only holds the Leadout entry.
1292 *
1293 * Heiko Eißfeldt.
1294 */
1295 ntracks = 0;
1296 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1297 (char *)&toc->hdr,
1298 sizeof(struct atapi_toc_header) +
1299 (ntracks + 1) *
1300 sizeof(struct atapi_toc_entry),
1301 sense);
1302 if (stat)
1303 return stat;
1304
1305 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1306 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1307 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1308 } else {
1309 toc->hdr.first_track = CDROM_LEADOUT;
1310 toc->hdr.last_track = CDROM_LEADOUT;
1311 }
1312 }
1313
1314 if (stat)
1315 return stat;
1316
1317 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1318
1319 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1320 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1321 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1322 }
1323
1324 for (i = 0; i <= ntracks; i++) {
1325 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1326 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1327 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1328 msf_from_bcd(&toc->ent[i].addr.msf);
1329 }
1330 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1331 toc->ent[i].addr.msf.second,
1332 toc->ent[i].addr.msf.frame);
1333 }
1334
1335 if (toc->hdr.first_track != CDROM_LEADOUT) {
1336 /* read the multisession information */
1337 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1338 sizeof(ms_tmp), sense);
1339 if (stat)
1340 return stat;
1341
1342 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1343 } else {
1344 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1345 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1346 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1347 }
1348
1349 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1350 /* re-read multisession information using MSF format */
1351 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1352 sizeof(ms_tmp), sense);
1353 if (stat)
1354 return stat;
1355
1356 msf_from_bcd(&ms_tmp.ent.addr.msf);
1357 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1358 ms_tmp.ent.addr.msf.second,
1359 ms_tmp.ent.addr.msf.frame);
1360 }
1361
1362 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1363
1364 /* now try to get the total cdrom capacity */
1365 stat = cdrom_get_last_written(cdi, &last_written);
1366 if (!stat && (last_written > toc->capacity)) {
1367 toc->capacity = last_written;
1368 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1369 drive->probed_capacity = toc->capacity * sectors_per_frame;
1370 }
1371
1372 /* Remember that we've read this stuff. */
1373 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1374
1375 return 0;
1376 }
1377
1378 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1379 {
1380 struct cdrom_info *info = drive->driver_data;
1381 struct cdrom_device_info *cdi = &info->devinfo;
1382 struct packet_command cgc;
1383 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1384
1385 ide_debug_log(IDE_DBG_FUNC, "enter");
1386
1387 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1388 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1389
1390 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1391 do {
1392 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1393 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1394 if (!stat)
1395 break;
1396 } while (--attempts);
1397 return stat;
1398 }
1399
1400 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1401 {
1402 struct cdrom_info *cd = drive->driver_data;
1403 u16 curspeed, maxspeed;
1404
1405 ide_debug_log(IDE_DBG_FUNC, "enter");
1406
1407 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1408 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1409 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1410 } else {
1411 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1412 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1413 }
1414
1415 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1416 curspeed, maxspeed);
1417
1418 cd->current_speed = (curspeed + (176/2)) / 176;
1419 cd->max_speed = (maxspeed + (176/2)) / 176;
1420 }
1421
1422 #define IDE_CD_CAPABILITIES \
1423 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1424 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1425 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1426 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1427 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1428
1429 static struct cdrom_device_ops ide_cdrom_dops = {
1430 .open = ide_cdrom_open_real,
1431 .release = ide_cdrom_release_real,
1432 .drive_status = ide_cdrom_drive_status,
1433 .media_changed = ide_cdrom_check_media_change_real,
1434 .tray_move = ide_cdrom_tray_move,
1435 .lock_door = ide_cdrom_lock_door,
1436 .select_speed = ide_cdrom_select_speed,
1437 .get_last_session = ide_cdrom_get_last_session,
1438 .get_mcn = ide_cdrom_get_mcn,
1439 .reset = ide_cdrom_reset,
1440 .audio_ioctl = ide_cdrom_audio_ioctl,
1441 .capability = IDE_CD_CAPABILITIES,
1442 .generic_packet = ide_cdrom_packet,
1443 };
1444
1445 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1446 {
1447 struct cdrom_info *info = drive->driver_data;
1448 struct cdrom_device_info *devinfo = &info->devinfo;
1449
1450 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1451
1452 devinfo->ops = &ide_cdrom_dops;
1453 devinfo->speed = info->current_speed;
1454 devinfo->capacity = nslots;
1455 devinfo->handle = drive;
1456 strcpy(devinfo->name, drive->name);
1457
1458 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1459 devinfo->mask |= CDC_SELECT_SPEED;
1460
1461 devinfo->disk = info->disk;
1462 return register_cdrom(devinfo);
1463 }
1464
1465 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1466 {
1467 struct cdrom_info *cd = drive->driver_data;
1468 struct cdrom_device_info *cdi = &cd->devinfo;
1469 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1470 mechtype_t mechtype;
1471 int nslots = 1;
1472
1473 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1474 drive->media, drive->atapi_flags);
1475
1476 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1477 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1478 CDC_MO_DRIVE | CDC_RAM);
1479
1480 if (drive->media == ide_optical) {
1481 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1482 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1483 drive->name);
1484 return nslots;
1485 }
1486
1487 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1488 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1489 cdi->mask &= ~CDC_PLAY_AUDIO;
1490 return nslots;
1491 }
1492
1493 /*
1494 * We have to cheat a little here. the packet will eventually be queued
1495 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1496 * Since this device hasn't been registered with the Uniform layer yet,
1497 * it can't do this. Same goes for cdi->ops.
1498 */
1499 cdi->handle = drive;
1500 cdi->ops = &ide_cdrom_dops;
1501
1502 if (ide_cdrom_get_capabilities(drive, buf))
1503 return 0;
1504
1505 if ((buf[8 + 6] & 0x01) == 0)
1506 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1507 if (buf[8 + 6] & 0x08)
1508 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1509 if (buf[8 + 3] & 0x01)
1510 cdi->mask &= ~CDC_CD_R;
1511 if (buf[8 + 3] & 0x02)
1512 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1513 if (buf[8 + 2] & 0x38)
1514 cdi->mask &= ~CDC_DVD;
1515 if (buf[8 + 3] & 0x20)
1516 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1517 if (buf[8 + 3] & 0x10)
1518 cdi->mask &= ~CDC_DVD_R;
1519 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1520 cdi->mask &= ~CDC_PLAY_AUDIO;
1521
1522 mechtype = buf[8 + 6] >> 5;
1523 if (mechtype == mechtype_caddy ||
1524 mechtype == mechtype_popup ||
1525 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1526 cdi->mask |= CDC_CLOSE_TRAY;
1527
1528 if (cdi->sanyo_slot > 0) {
1529 cdi->mask &= ~CDC_SELECT_DISC;
1530 nslots = 3;
1531 } else if (mechtype == mechtype_individual_changer ||
1532 mechtype == mechtype_cartridge_changer) {
1533 nslots = cdrom_number_of_slots(cdi);
1534 if (nslots > 1)
1535 cdi->mask &= ~CDC_SELECT_DISC;
1536 }
1537
1538 ide_cdrom_update_speed(drive, buf);
1539
1540 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1541
1542 /* don't print speed if the drive reported 0 */
1543 if (cd->max_speed)
1544 printk(KERN_CONT " %dX", cd->max_speed);
1545
1546 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1547
1548 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1549 printk(KERN_CONT " DVD%s%s",
1550 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1551 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1552
1553 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1554 printk(KERN_CONT " CD%s%s",
1555 (cdi->mask & CDC_CD_R) ? "" : "-R",
1556 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1557
1558 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1559 printk(KERN_CONT " changer w/%d slots", nslots);
1560 else
1561 printk(KERN_CONT " drive");
1562
1563 printk(KERN_CONT ", %dkB Cache\n",
1564 be16_to_cpup((__be16 *)&buf[8 + 12]));
1565
1566 return nslots;
1567 }
1568
1569 /* standard prep_rq_fn that builds 10 byte cmds */
1570 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1571 {
1572 int hard_sect = queue_hardsect_size(q);
1573 long block = (long)rq->hard_sector / (hard_sect >> 9);
1574 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1575
1576 memset(rq->cmd, 0, BLK_MAX_CDB);
1577
1578 if (rq_data_dir(rq) == READ)
1579 rq->cmd[0] = GPCMD_READ_10;
1580 else
1581 rq->cmd[0] = GPCMD_WRITE_10;
1582
1583 /*
1584 * fill in lba
1585 */
1586 rq->cmd[2] = (block >> 24) & 0xff;
1587 rq->cmd[3] = (block >> 16) & 0xff;
1588 rq->cmd[4] = (block >> 8) & 0xff;
1589 rq->cmd[5] = block & 0xff;
1590
1591 /*
1592 * and transfer length
1593 */
1594 rq->cmd[7] = (blocks >> 8) & 0xff;
1595 rq->cmd[8] = blocks & 0xff;
1596 rq->cmd_len = 10;
1597 return BLKPREP_OK;
1598 }
1599
1600 /*
1601 * Most of the SCSI commands are supported directly by ATAPI devices.
1602 * This transform handles the few exceptions.
1603 */
1604 static int ide_cdrom_prep_pc(struct request *rq)
1605 {
1606 u8 *c = rq->cmd;
1607
1608 /* transform 6-byte read/write commands to the 10-byte version */
1609 if (c[0] == READ_6 || c[0] == WRITE_6) {
1610 c[8] = c[4];
1611 c[5] = c[3];
1612 c[4] = c[2];
1613 c[3] = c[1] & 0x1f;
1614 c[2] = 0;
1615 c[1] &= 0xe0;
1616 c[0] += (READ_10 - READ_6);
1617 rq->cmd_len = 10;
1618 return BLKPREP_OK;
1619 }
1620
1621 /*
1622 * it's silly to pretend we understand 6-byte sense commands, just
1623 * reject with ILLEGAL_REQUEST and the caller should take the
1624 * appropriate action
1625 */
1626 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1627 rq->errors = ILLEGAL_REQUEST;
1628 return BLKPREP_KILL;
1629 }
1630
1631 return BLKPREP_OK;
1632 }
1633
1634 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1635 {
1636 if (blk_fs_request(rq))
1637 return ide_cdrom_prep_fs(q, rq);
1638 else if (blk_pc_request(rq))
1639 return ide_cdrom_prep_pc(rq);
1640
1641 return 0;
1642 }
1643
1644 struct cd_list_entry {
1645 const char *id_model;
1646 const char *id_firmware;
1647 unsigned int cd_flags;
1648 };
1649
1650 #ifdef CONFIG_IDE_PROC_FS
1651 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1652 {
1653 unsigned long capacity, sectors_per_frame;
1654
1655 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1656 return 0;
1657
1658 return capacity * sectors_per_frame;
1659 }
1660
1661 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1662 int count, int *eof, void *data)
1663 {
1664 ide_drive_t *drive = data;
1665 int len;
1666
1667 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1668 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1669 }
1670
1671 static ide_proc_entry_t idecd_proc[] = {
1672 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1673 { NULL, 0, NULL, NULL }
1674 };
1675
1676 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1677 {
1678 return idecd_proc;
1679 }
1680
1681 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1682 {
1683 return NULL;
1684 }
1685 #endif
1686
1687 static const struct cd_list_entry ide_cd_quirks_list[] = {
1688 /* Limit transfer size per interrupt. */
1689 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1690 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1691 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1692 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1693 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1694 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1695 IDE_AFLAG_PRE_ATAPI12, },
1696 /* Vertos 300, some versions of this drive like to talk BCD. */
1697 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1698 /* Vertos 600 ESD. */
1699 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1700 /*
1701 * Sanyo 3 CD changer uses a non-standard command for CD changing
1702 * (by default standard ATAPI support for CD changers is used).
1703 */
1704 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1705 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1706 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1707 /* Stingray 8X CD-ROM. */
1708 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1709 /*
1710 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1711 * mode sense page capabilities size, but older drives break.
1712 */
1713 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1714 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1715 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1716 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1717 /*
1718 * Some drives used by Apple don't advertise audio play
1719 * but they do support reading TOC & audio datas.
1720 */
1721 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1722 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1723 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1724 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1725 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1726 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1727 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1728 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1729 { NULL, NULL, 0 }
1730 };
1731
1732 static unsigned int ide_cd_flags(u16 *id)
1733 {
1734 const struct cd_list_entry *cle = ide_cd_quirks_list;
1735
1736 while (cle->id_model) {
1737 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1738 (cle->id_firmware == NULL ||
1739 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1740 return cle->cd_flags;
1741 cle++;
1742 }
1743
1744 return 0;
1745 }
1746
1747 static int ide_cdrom_setup(ide_drive_t *drive)
1748 {
1749 struct cdrom_info *cd = drive->driver_data;
1750 struct cdrom_device_info *cdi = &cd->devinfo;
1751 u16 *id = drive->id;
1752 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1753 int nslots;
1754
1755 ide_debug_log(IDE_DBG_PROBE, "enter");
1756
1757 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1758 blk_queue_dma_alignment(drive->queue, 31);
1759 blk_queue_update_dma_pad(drive->queue, 15);
1760 drive->queue->unplug_delay = (1 * HZ) / 1000;
1761 if (!drive->queue->unplug_delay)
1762 drive->queue->unplug_delay = 1;
1763
1764 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1765 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1766
1767 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1768 fw_rev[4] == '1' && fw_rev[6] <= '2')
1769 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1770 IDE_AFLAG_TOCADDR_AS_BCD);
1771 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1772 fw_rev[4] == '1' && fw_rev[6] <= '2')
1773 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1774 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1775 /* 3 => use CD in slot 0 */
1776 cdi->sanyo_slot = 3;
1777
1778 nslots = ide_cdrom_probe_capabilities(drive);
1779
1780 /* set correct block size */
1781 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1782
1783 if (ide_cdrom_register(drive, nslots)) {
1784 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1785 " cdrom driver.\n", drive->name, __func__);
1786 cd->devinfo.handle = NULL;
1787 return 1;
1788 }
1789
1790 ide_proc_register_driver(drive, cd->driver);
1791 return 0;
1792 }
1793
1794 static void ide_cd_remove(ide_drive_t *drive)
1795 {
1796 struct cdrom_info *info = drive->driver_data;
1797
1798 ide_debug_log(IDE_DBG_FUNC, "enter");
1799
1800 ide_proc_unregister_driver(drive, info->driver);
1801 device_del(&info->dev);
1802 del_gendisk(info->disk);
1803
1804 mutex_lock(&idecd_ref_mutex);
1805 put_device(&info->dev);
1806 mutex_unlock(&idecd_ref_mutex);
1807 }
1808
1809 static void ide_cd_release(struct device *dev)
1810 {
1811 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1812 struct cdrom_device_info *devinfo = &info->devinfo;
1813 ide_drive_t *drive = info->drive;
1814 struct gendisk *g = info->disk;
1815
1816 ide_debug_log(IDE_DBG_FUNC, "enter");
1817
1818 kfree(info->toc);
1819 if (devinfo->handle == drive)
1820 unregister_cdrom(devinfo);
1821 drive->driver_data = NULL;
1822 blk_queue_prep_rq(drive->queue, NULL);
1823 g->private_data = NULL;
1824 put_disk(g);
1825 kfree(info);
1826 }
1827
1828 static int ide_cd_probe(ide_drive_t *);
1829
1830 static struct ide_driver ide_cdrom_driver = {
1831 .gen_driver = {
1832 .owner = THIS_MODULE,
1833 .name = "ide-cdrom",
1834 .bus = &ide_bus_type,
1835 },
1836 .probe = ide_cd_probe,
1837 .remove = ide_cd_remove,
1838 .version = IDECD_VERSION,
1839 .do_request = ide_cd_do_request,
1840 #ifdef CONFIG_IDE_PROC_FS
1841 .proc_entries = ide_cd_proc_entries,
1842 .proc_devsets = ide_cd_proc_devsets,
1843 #endif
1844 };
1845
1846 static int idecd_open(struct block_device *bdev, fmode_t mode)
1847 {
1848 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1849 int rc = -ENOMEM;
1850
1851 if (!info)
1852 return -ENXIO;
1853
1854 rc = cdrom_open(&info->devinfo, bdev, mode);
1855
1856 if (rc < 0)
1857 ide_cd_put(info);
1858
1859 return rc;
1860 }
1861
1862 static int idecd_release(struct gendisk *disk, fmode_t mode)
1863 {
1864 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1865
1866 cdrom_release(&info->devinfo, mode);
1867
1868 ide_cd_put(info);
1869
1870 return 0;
1871 }
1872
1873 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1874 {
1875 struct packet_command cgc;
1876 char buffer[16];
1877 int stat;
1878 char spindown;
1879
1880 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1881 return -EFAULT;
1882
1883 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1884
1885 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1886 if (stat)
1887 return stat;
1888
1889 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1890 return cdrom_mode_select(cdi, &cgc);
1891 }
1892
1893 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1894 {
1895 struct packet_command cgc;
1896 char buffer[16];
1897 int stat;
1898 char spindown;
1899
1900 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1901
1902 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1903 if (stat)
1904 return stat;
1905
1906 spindown = buffer[11] & 0x0f;
1907 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1908 return -EFAULT;
1909 return 0;
1910 }
1911
1912 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1913 unsigned int cmd, unsigned long arg)
1914 {
1915 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1916 int err;
1917
1918 switch (cmd) {
1919 case CDROMSETSPINDOWN:
1920 return idecd_set_spindown(&info->devinfo, arg);
1921 case CDROMGETSPINDOWN:
1922 return idecd_get_spindown(&info->devinfo, arg);
1923 default:
1924 break;
1925 }
1926
1927 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1928 if (err == -EINVAL)
1929 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1930
1931 return err;
1932 }
1933
1934 static int idecd_media_changed(struct gendisk *disk)
1935 {
1936 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1937 return cdrom_media_changed(&info->devinfo);
1938 }
1939
1940 static int idecd_revalidate_disk(struct gendisk *disk)
1941 {
1942 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1943 struct request_sense sense;
1944
1945 ide_cd_read_toc(info->drive, &sense);
1946
1947 return 0;
1948 }
1949
1950 static struct block_device_operations idecd_ops = {
1951 .owner = THIS_MODULE,
1952 .open = idecd_open,
1953 .release = idecd_release,
1954 .locked_ioctl = idecd_ioctl,
1955 .media_changed = idecd_media_changed,
1956 .revalidate_disk = idecd_revalidate_disk
1957 };
1958
1959 /* module options */
1960 static char *ignore;
1961 module_param(ignore, charp, 0400);
1962
1963 static unsigned long debug_mask;
1964 module_param(debug_mask, ulong, 0644);
1965
1966 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1967
1968 static int ide_cd_probe(ide_drive_t *drive)
1969 {
1970 struct cdrom_info *info;
1971 struct gendisk *g;
1972 struct request_sense sense;
1973
1974 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1975 drive->driver_req, drive->media);
1976
1977 if (!strstr("ide-cdrom", drive->driver_req))
1978 goto failed;
1979
1980 if (drive->media != ide_cdrom && drive->media != ide_optical)
1981 goto failed;
1982
1983 /* skip drives that we were told to ignore */
1984 if (ignore != NULL) {
1985 if (strstr(ignore, drive->name)) {
1986 printk(KERN_INFO PFX "ignoring drive %s\n",
1987 drive->name);
1988 goto failed;
1989 }
1990 }
1991
1992 drive->debug_mask = debug_mask;
1993 drive->irq_handler = cdrom_newpc_intr;
1994
1995 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1996 if (info == NULL) {
1997 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1998 drive->name);
1999 goto failed;
2000 }
2001
2002 g = alloc_disk(1 << PARTN_BITS);
2003 if (!g)
2004 goto out_free_cd;
2005
2006 ide_init_disk(g, drive);
2007
2008 info->dev.parent = &drive->gendev;
2009 info->dev.release = ide_cd_release;
2010 dev_set_name(&info->dev, dev_name(&drive->gendev));
2011
2012 if (device_register(&info->dev))
2013 goto out_free_disk;
2014
2015 info->drive = drive;
2016 info->driver = &ide_cdrom_driver;
2017 info->disk = g;
2018
2019 g->private_data = &info->driver;
2020
2021 drive->driver_data = info;
2022
2023 g->minors = 1;
2024 g->driverfs_dev = &drive->gendev;
2025 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2026 if (ide_cdrom_setup(drive)) {
2027 put_device(&info->dev);
2028 goto failed;
2029 }
2030
2031 ide_cd_read_toc(drive, &sense);
2032 g->fops = &idecd_ops;
2033 g->flags |= GENHD_FL_REMOVABLE;
2034 add_disk(g);
2035 return 0;
2036
2037 out_free_disk:
2038 put_disk(g);
2039 out_free_cd:
2040 kfree(info);
2041 failed:
2042 return -ENODEV;
2043 }
2044
2045 static void __exit ide_cdrom_exit(void)
2046 {
2047 driver_unregister(&ide_cdrom_driver.gen_driver);
2048 }
2049
2050 static int __init ide_cdrom_init(void)
2051 {
2052 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2053 return driver_register(&ide_cdrom_driver.gen_driver);
2054 }
2055
2056 MODULE_ALIAS("ide:*m-cdrom*");
2057 MODULE_ALIAS("ide-cd");
2058 module_init(ide_cdrom_init);
2059 module_exit(ide_cdrom_exit);
2060 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards