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spi_mpc83xx: fix sparse warnings
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob3f630e4080d42abec2711eb597ccf8ff17fc616d
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 static DEFINE_MUTEX(idecd_ref_mutex);
57
58 static void ide_cd_release(struct device *);
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 get_device(&cd->dev);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75 }
76
77 static void ide_cd_put(struct cdrom_info *cd)
78 {
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 put_device(&cd->dev);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85 }
86
87 /*
88 * Generic packet command support and error handling routines.
89 */
90
91 /* Mark that we've seen a media change and invalidate our internal buffers. */
92 static void cdrom_saw_media_change(ide_drive_t *drive)
93 {
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96 }
97
98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
99 struct request_sense *sense)
100 {
101 int log = 0;
102
103 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
104
105 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
106 return 0;
107
108 switch (sense->sense_key) {
109 case NO_SENSE:
110 case RECOVERED_ERROR:
111 break;
112 case NOT_READY:
113 /*
114 * don't care about tray state messages for e.g. capacity
115 * commands or in-progress or becoming ready
116 */
117 if (sense->asc == 0x3a || sense->asc == 0x04)
118 break;
119 log = 1;
120 break;
121 case ILLEGAL_REQUEST:
122 /*
123 * don't log START_STOP unit with LoEj set, since we cannot
124 * reliably check if drive can auto-close
125 */
126 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
127 break;
128 log = 1;
129 break;
130 case UNIT_ATTENTION:
131 /*
132 * Make good and sure we've seen this potential media change.
133 * Some drives (i.e. Creative) fail to present the correct sense
134 * key in the error register.
135 */
136 cdrom_saw_media_change(drive);
137 break;
138 default:
139 log = 1;
140 break;
141 }
142 return log;
143 }
144
145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
146 struct request *failed_command,
147 struct request_sense *sense)
148 {
149 unsigned long sector;
150 unsigned long bio_sectors;
151 struct cdrom_info *info = drive->driver_data;
152
153 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
154 sense->error_code, sense->sense_key);
155
156 if (failed_command)
157 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
158 failed_command->cmd[0]);
159
160 if (!cdrom_log_sense(drive, failed_command, sense))
161 return;
162
163 /*
164 * If a read toc is executed for a CD-R or CD-RW medium where the first
165 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
166 * confusing error)
167 */
168 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
169 if (sense->sense_key == 0x05 && sense->asc == 0x24)
170 return;
171
172 /* current error */
173 if (sense->error_code == 0x70) {
174 switch (sense->sense_key) {
175 case MEDIUM_ERROR:
176 case VOLUME_OVERFLOW:
177 case ILLEGAL_REQUEST:
178 if (!sense->valid)
179 break;
180 if (failed_command == NULL ||
181 !blk_fs_request(failed_command))
182 break;
183 sector = (sense->information[0] << 24) |
184 (sense->information[1] << 16) |
185 (sense->information[2] << 8) |
186 (sense->information[3]);
187
188 if (drive->queue->hardsect_size == 2048)
189 /* device sector size is 2K */
190 sector <<= 2;
191
192 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
193 sector &= ~(bio_sectors - 1);
194
195 /*
196 * The SCSI specification allows for the value
197 * returned by READ CAPACITY to be up to 75 2K
198 * sectors past the last readable block.
199 * Therefore, if we hit a medium error within the
200 * last 75 2K sectors, we decrease the saved size
201 * value.
202 */
203 if (sector < get_capacity(info->disk) &&
204 drive->probed_capacity - sector < 4 * 75)
205 set_capacity(info->disk, sector);
206 }
207 }
208
209 ide_cd_log_error(drive->name, failed_command, sense);
210 }
211
212 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
213 struct request *failed_command)
214 {
215 struct cdrom_info *info = drive->driver_data;
216 struct request *rq = &drive->request_sense_rq;
217
218 ide_debug_log(IDE_DBG_SENSE, "enter");
219
220 if (sense == NULL)
221 sense = &info->sense_data;
222
223 /* stuff the sense request in front of our current request */
224 blk_rq_init(NULL, rq);
225 rq->cmd_type = REQ_TYPE_ATA_PC;
226 rq->rq_disk = info->disk;
227
228 rq->data = sense;
229 rq->cmd[0] = GPCMD_REQUEST_SENSE;
230 rq->cmd[4] = 18;
231 rq->data_len = 18;
232
233 rq->cmd_type = REQ_TYPE_SENSE;
234 rq->cmd_flags |= REQ_PREEMPT;
235
236 /* NOTE! Save the failed command in "rq->buffer" */
237 rq->buffer = (void *) failed_command;
238
239 if (failed_command)
240 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
241 failed_command->cmd[0]);
242
243 drive->hwif->rq = NULL;
244
245 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
246 }
247
248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
249 {
250 struct request *rq = drive->hwif->rq;
251 int nsectors = rq->hard_cur_sectors;
252
253 ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
254 rq->cmd[0], uptodate, nsectors);
255
256 if (blk_sense_request(rq) && uptodate) {
257 /*
258 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
259 * failed request
260 */
261 struct request *failed = (struct request *) rq->buffer;
262 struct cdrom_info *info = drive->driver_data;
263 void *sense = &info->sense_data;
264
265 if (failed) {
266 if (failed->sense) {
267 sense = failed->sense;
268 failed->sense_len = rq->sense_len;
269 }
270 cdrom_analyze_sense_data(drive, failed, sense);
271 /*
272 * now end the failed request
273 */
274 if (blk_fs_request(failed)) {
275 if (ide_end_rq(drive, failed, -EIO,
276 failed->hard_nr_sectors << 9))
277 BUG();
278 } else {
279 if (blk_end_request(failed, -EIO,
280 failed->data_len))
281 BUG();
282 }
283 } else
284 cdrom_analyze_sense_data(drive, NULL, sense);
285 }
286
287 if (!rq->current_nr_sectors && blk_fs_request(rq))
288 uptodate = 1;
289 /* make sure it's fully ended */
290 if (blk_pc_request(rq))
291 nsectors = (rq->data_len + 511) >> 9;
292 if (!nsectors)
293 nsectors = 1;
294
295 ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
296 uptodate, nsectors);
297
298 if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
299 rq->errors = -EIO;
300
301 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
302 }
303
304 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
305 {
306 if (st & 0x80)
307 return;
308 ide_dump_status(drive, msg, st);
309 }
310
311 /*
312 * Returns:
313 * 0: if the request should be continued.
314 * 1: if the request was ended.
315 */
316 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
317 {
318 ide_hwif_t *hwif = drive->hwif;
319 struct request *rq = hwif->rq;
320 int stat, err, sense_key;
321
322 /* check for errors */
323 stat = hwif->tp_ops->read_status(hwif);
324
325 if (stat_ret)
326 *stat_ret = stat;
327
328 if (OK_STAT(stat, good_stat, BAD_R_STAT))
329 return 0;
330
331 /* get the IDE error register */
332 err = ide_read_error(drive);
333 sense_key = err >> 4;
334
335 if (rq == NULL) {
336 printk(KERN_ERR PFX "%s: missing rq in %s\n",
337 drive->name, __func__);
338 return 1;
339 }
340
341 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
342 "rq->cmd_type: 0x%x, err: 0x%x",
343 stat, good_stat, rq->cmd[0], rq->cmd_type,
344 err);
345
346 if (blk_sense_request(rq)) {
347 /*
348 * We got an error trying to get sense info from the drive
349 * (probably while trying to recover from a former error).
350 * Just give up.
351 */
352 rq->cmd_flags |= REQ_FAILED;
353 cdrom_end_request(drive, 0);
354 ide_error(drive, "request sense failure", stat);
355 return 1;
356
357 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
358 /* All other functions, except for READ. */
359
360 /*
361 * if we have an error, pass back CHECK_CONDITION as the
362 * scsi status byte
363 */
364 if (blk_pc_request(rq) && !rq->errors)
365 rq->errors = SAM_STAT_CHECK_CONDITION;
366
367 /* check for tray open */
368 if (sense_key == NOT_READY) {
369 cdrom_saw_media_change(drive);
370 } else if (sense_key == UNIT_ATTENTION) {
371 /* check for media change */
372 cdrom_saw_media_change(drive);
373 return 0;
374 } else if (sense_key == ILLEGAL_REQUEST &&
375 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
376 /*
377 * Don't print error message for this condition--
378 * SFF8090i indicates that 5/24/00 is the correct
379 * response to a request to close the tray if the
380 * drive doesn't have that capability.
381 * cdrom_log_sense() knows this!
382 */
383 } else if (!(rq->cmd_flags & REQ_QUIET)) {
384 /* otherwise, print an error */
385 ide_dump_status(drive, "packet command error", stat);
386 }
387
388 rq->cmd_flags |= REQ_FAILED;
389
390 /*
391 * instead of playing games with moving completions around,
392 * remove failed request completely and end it when the
393 * request sense has completed
394 */
395 goto end_request;
396
397 } else if (blk_fs_request(rq)) {
398 int do_end_request = 0;
399
400 /* handle errors from READ and WRITE requests */
401
402 if (blk_noretry_request(rq))
403 do_end_request = 1;
404
405 if (sense_key == NOT_READY) {
406 /* tray open */
407 if (rq_data_dir(rq) == READ) {
408 cdrom_saw_media_change(drive);
409
410 /* fail the request */
411 printk(KERN_ERR PFX "%s: tray open\n",
412 drive->name);
413 do_end_request = 1;
414 } else {
415 struct cdrom_info *info = drive->driver_data;
416
417 /*
418 * Allow the drive 5 seconds to recover, some
419 * devices will return this error while flushing
420 * data from cache.
421 */
422 if (!rq->errors)
423 info->write_timeout = jiffies +
424 ATAPI_WAIT_WRITE_BUSY;
425 rq->errors = 1;
426 if (time_after(jiffies, info->write_timeout))
427 do_end_request = 1;
428 else {
429 struct request_queue *q = drive->queue;
430 unsigned long flags;
431
432 /*
433 * take a breather relying on the unplug
434 * timer to kick us again
435 */
436 spin_lock_irqsave(q->queue_lock, flags);
437 blk_plug_device(q);
438 spin_unlock_irqrestore(q->queue_lock, flags);
439
440 return 1;
441 }
442 }
443 } else if (sense_key == UNIT_ATTENTION) {
444 /* media change */
445 cdrom_saw_media_change(drive);
446
447 /*
448 * Arrange to retry the request but be sure to give up
449 * if we've retried too many times.
450 */
451 if (++rq->errors > ERROR_MAX)
452 do_end_request = 1;
453 } else if (sense_key == ILLEGAL_REQUEST ||
454 sense_key == DATA_PROTECT) {
455 /*
456 * No point in retrying after an illegal request or data
457 * protect error.
458 */
459 ide_dump_status_no_sense(drive, "command error", stat);
460 do_end_request = 1;
461 } else if (sense_key == MEDIUM_ERROR) {
462 /*
463 * No point in re-trying a zillion times on a bad
464 * sector. If we got here the error is not correctable.
465 */
466 ide_dump_status_no_sense(drive,
467 "media error (bad sector)",
468 stat);
469 do_end_request = 1;
470 } else if (sense_key == BLANK_CHECK) {
471 /* disk appears blank ?? */
472 ide_dump_status_no_sense(drive, "media error (blank)",
473 stat);
474 do_end_request = 1;
475 } else if ((err & ~ATA_ABORTED) != 0) {
476 /* go to the default handler for other errors */
477 ide_error(drive, "cdrom_decode_status", stat);
478 return 1;
479 } else if ((++rq->errors > ERROR_MAX)) {
480 /* we've racked up too many retries, abort */
481 do_end_request = 1;
482 }
483
484 /*
485 * End a request through request sense analysis when we have
486 * sense data. We need this in order to perform end of media
487 * processing.
488 */
489 if (do_end_request)
490 goto end_request;
491
492 /*
493 * If we got a CHECK_CONDITION status, queue
494 * a request sense command.
495 */
496 if (stat & ATA_ERR)
497 cdrom_queue_request_sense(drive, NULL, NULL);
498 } else {
499 blk_dump_rq_flags(rq, PFX "bad rq");
500 cdrom_end_request(drive, 0);
501 }
502
503 /* retry, or handle the next request */
504 return 1;
505
506 end_request:
507 if (stat & ATA_ERR) {
508 struct request_queue *q = drive->queue;
509 unsigned long flags;
510
511 spin_lock_irqsave(q->queue_lock, flags);
512 blkdev_dequeue_request(rq);
513 spin_unlock_irqrestore(q->queue_lock, flags);
514
515 hwif->rq = NULL;
516
517 cdrom_queue_request_sense(drive, rq->sense, rq);
518 } else
519 cdrom_end_request(drive, 0);
520
521 return 1;
522 }
523
524 /*
525 * Check the contents of the interrupt reason register from the cdrom
526 * and attempt to recover if there are problems. Returns 0 if everything's
527 * ok; nonzero if the request has been terminated.
528 */
529 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
530 int len, int ireason, int rw)
531 {
532 ide_hwif_t *hwif = drive->hwif;
533
534 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
535
536 /*
537 * ireason == 0: the drive wants to receive data from us
538 * ireason == 2: the drive is expecting to transfer data to us
539 */
540 if (ireason == (!rw << 1))
541 return 0;
542 else if (ireason == (rw << 1)) {
543
544 /* whoops... */
545 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
546 drive->name, __func__);
547
548 ide_pad_transfer(drive, rw, len);
549 } else if (rw == 0 && ireason == 1) {
550 /*
551 * Some drives (ASUS) seem to tell us that status info is
552 * available. Just get it and ignore.
553 */
554 (void)hwif->tp_ops->read_status(hwif);
555 return 0;
556 } else {
557 /* drive wants a command packet, or invalid ireason... */
558 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
559 drive->name, __func__, ireason);
560 }
561
562 if (rq->cmd_type == REQ_TYPE_ATA_PC)
563 rq->cmd_flags |= REQ_FAILED;
564
565 cdrom_end_request(drive, 0);
566 return -1;
567 }
568
569 /*
570 * Assume that the drive will always provide data in multiples of at least
571 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
572 */
573 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
574 {
575 ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
576
577 if ((len % SECTOR_SIZE) == 0)
578 return 0;
579
580 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
581 __func__, len);
582
583 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
584 printk(KERN_ERR PFX "This drive is not supported by this "
585 "version of the driver\n");
586 else {
587 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
588 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
589 }
590
591 return 1;
592 }
593
594 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
595 struct request *rq)
596 {
597 ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
598
599 if (rq_data_dir(rq) == READ) {
600 unsigned short sectors_per_frame =
601 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
602 int nskip = rq->sector & (sectors_per_frame - 1);
603
604 /*
605 * If the requested sector doesn't start on a frame boundary,
606 * we must adjust the start of the transfer so that it does,
607 * and remember to skip the first few sectors.
608 *
609 * If the rq->current_nr_sectors field is larger than the size
610 * of the buffer, it will mean that we're to skip a number of
611 * sectors equal to the amount by which rq->current_nr_sectors
612 * is larger than the buffer size.
613 */
614 if (nskip > 0) {
615 /* sanity check... */
616 if (rq->current_nr_sectors !=
617 bio_cur_sectors(rq->bio)) {
618 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
619 drive->name, __func__,
620 rq->current_nr_sectors);
621 cdrom_end_request(drive, 0);
622 return ide_stopped;
623 }
624 rq->current_nr_sectors += nskip;
625 }
626 }
627
628 /* set up the command */
629 rq->timeout = ATAPI_WAIT_PC;
630
631 return ide_started;
632 }
633
634 /*
635 * Fix up a possibly partially-processed request so that we can start it over
636 * entirely, or even put it back on the request queue.
637 */
638 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
639 {
640
641 ide_debug_log(IDE_DBG_FUNC, "enter");
642
643 if (rq->buffer != bio_data(rq->bio)) {
644 sector_t n =
645 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
646
647 rq->buffer = bio_data(rq->bio);
648 rq->nr_sectors += n;
649 rq->sector -= n;
650 }
651 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
652 rq->hard_cur_sectors = rq->current_nr_sectors;
653 rq->hard_nr_sectors = rq->nr_sectors;
654 rq->hard_sector = rq->sector;
655 rq->q->prep_rq_fn(rq->q, rq);
656 }
657
658 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
659 {
660 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
661
662 /*
663 * Some of the trailing request sense fields are optional,
664 * and some drives don't send them. Sigh.
665 */
666 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
667 rq->data_len > 0 && rq->data_len <= 5)
668 while (rq->data_len > 0) {
669 *(u8 *)rq->data++ = 0;
670 --rq->data_len;
671 }
672 }
673
674 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
675 int write, void *buffer, unsigned *bufflen,
676 struct request_sense *sense, int timeout,
677 unsigned int cmd_flags)
678 {
679 struct cdrom_info *info = drive->driver_data;
680 struct request_sense local_sense;
681 int retries = 10;
682 unsigned int flags = 0;
683
684 if (!sense)
685 sense = &local_sense;
686
687 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
688 "cmd_flags: 0x%x",
689 cmd[0], write, timeout, cmd_flags);
690
691 /* start of retry loop */
692 do {
693 struct request *rq;
694 int error;
695
696 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
697
698 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
699 rq->cmd_type = REQ_TYPE_ATA_PC;
700 rq->sense = sense;
701 rq->cmd_flags |= cmd_flags;
702 rq->timeout = timeout;
703 if (buffer) {
704 rq->data = buffer;
705 rq->data_len = *bufflen;
706 }
707
708 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
709
710 if (buffer)
711 *bufflen = rq->data_len;
712
713 flags = rq->cmd_flags;
714 blk_put_request(rq);
715
716 /*
717 * FIXME: we should probably abort/retry or something in case of
718 * failure.
719 */
720 if (flags & REQ_FAILED) {
721 /*
722 * The request failed. Retry if it was due to a unit
723 * attention status (usually means media was changed).
724 */
725 struct request_sense *reqbuf = sense;
726
727 if (reqbuf->sense_key == UNIT_ATTENTION)
728 cdrom_saw_media_change(drive);
729 else if (reqbuf->sense_key == NOT_READY &&
730 reqbuf->asc == 4 && reqbuf->ascq != 4) {
731 /*
732 * The drive is in the process of loading
733 * a disk. Retry, but wait a little to give
734 * the drive time to complete the load.
735 */
736 ssleep(2);
737 } else {
738 /* otherwise, don't retry */
739 retries = 0;
740 }
741 --retries;
742 }
743
744 /* end of retry loop */
745 } while ((flags & REQ_FAILED) && retries >= 0);
746
747 /* return an error if the command failed */
748 return (flags & REQ_FAILED) ? -EIO : 0;
749 }
750
751 /*
752 * Called from blk_end_request_callback() after the data of the request is
753 * completed and before the request itself is completed. By returning value '1',
754 * blk_end_request_callback() returns immediately without completing it.
755 */
756 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
757 {
758 return 1;
759 }
760
761 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
762 {
763 ide_hwif_t *hwif = drive->hwif;
764 struct request *rq = hwif->rq;
765 xfer_func_t *xferfunc;
766 ide_expiry_t *expiry = NULL;
767 int dma_error = 0, dma, stat, thislen, uptodate = 0;
768 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
769 unsigned int timeout;
770 u16 len;
771 u8 ireason;
772
773 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
774 rq->cmd[0], write);
775
776 /* check for errors */
777 dma = drive->dma;
778 if (dma) {
779 drive->dma = 0;
780 dma_error = hwif->dma_ops->dma_end(drive);
781 if (dma_error) {
782 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
783 write ? "write" : "read");
784 ide_dma_off(drive);
785 }
786 }
787
788 if (cdrom_decode_status(drive, 0, &stat))
789 return ide_stopped;
790
791 /* using dma, transfer is complete now */
792 if (dma) {
793 if (dma_error)
794 return ide_error(drive, "dma error", stat);
795 if (blk_fs_request(rq)) {
796 ide_complete_rq(drive, 0, rq->nr_sectors
797 ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
798 return ide_stopped;
799 } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
800 ide_complete_rq(drive, 0, 512);
801 return ide_stopped;
802 }
803 goto end_request;
804 }
805
806 ide_read_bcount_and_ireason(drive, &len, &ireason);
807
808 thislen = blk_fs_request(rq) ? len : rq->data_len;
809 if (thislen > len)
810 thislen = len;
811
812 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
813 stat, thislen);
814
815 /* If DRQ is clear, the command has completed. */
816 if ((stat & ATA_DRQ) == 0) {
817 if (blk_fs_request(rq)) {
818 /*
819 * If we're not done reading/writing, complain.
820 * Otherwise, complete the command normally.
821 */
822 uptodate = 1;
823 if (rq->current_nr_sectors > 0) {
824 printk(KERN_ERR PFX "%s: %s: data underrun "
825 "(%d blocks)\n",
826 drive->name, __func__,
827 rq->current_nr_sectors);
828 if (!write)
829 rq->cmd_flags |= REQ_FAILED;
830 uptodate = 0;
831 }
832 cdrom_end_request(drive, uptodate);
833 return ide_stopped;
834 } else if (!blk_pc_request(rq)) {
835 ide_cd_request_sense_fixup(drive, rq);
836 /* complain if we still have data left to transfer */
837 uptodate = rq->data_len ? 0 : 1;
838 }
839 goto end_request;
840 }
841
842 /* check which way to transfer data */
843 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
844 return ide_stopped;
845
846 if (blk_fs_request(rq)) {
847 if (write == 0) {
848 int nskip;
849
850 if (ide_cd_check_transfer_size(drive, len)) {
851 cdrom_end_request(drive, 0);
852 return ide_stopped;
853 }
854
855 /*
856 * First, figure out if we need to bit-bucket
857 * any of the leading sectors.
858 */
859 nskip = min_t(int, rq->current_nr_sectors
860 - bio_cur_sectors(rq->bio),
861 thislen >> 9);
862 if (nskip > 0) {
863 ide_pad_transfer(drive, write, nskip << 9);
864 rq->current_nr_sectors -= nskip;
865 thislen -= (nskip << 9);
866 }
867 }
868 }
869
870 if (ireason == 0) {
871 write = 1;
872 xferfunc = hwif->tp_ops->output_data;
873 } else {
874 write = 0;
875 xferfunc = hwif->tp_ops->input_data;
876 }
877
878 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
879 "ireason: 0x%x",
880 rq->cmd_type, ireason);
881
882 /* transfer data */
883 while (thislen > 0) {
884 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
885 int blen = rq->data_len;
886
887 /* bio backed? */
888 if (rq->bio) {
889 if (blk_fs_request(rq)) {
890 ptr = rq->buffer;
891 blen = rq->current_nr_sectors << 9;
892 } else {
893 ptr = bio_data(rq->bio);
894 blen = bio_iovec(rq->bio)->bv_len;
895 }
896 }
897
898 if (!ptr) {
899 if (blk_fs_request(rq) && !write)
900 /*
901 * If the buffers are full, pipe the rest into
902 * oblivion.
903 */
904 ide_pad_transfer(drive, 0, thislen);
905 else {
906 printk(KERN_ERR PFX "%s: confused, missing data\n",
907 drive->name);
908 blk_dump_rq_flags(rq, rq_data_dir(rq)
909 ? "cdrom_newpc_intr, write"
910 : "cdrom_newpc_intr, read");
911 }
912 break;
913 }
914
915 if (blen > thislen)
916 blen = thislen;
917
918 xferfunc(drive, NULL, ptr, blen);
919
920 thislen -= blen;
921 len -= blen;
922
923 if (blk_fs_request(rq)) {
924 rq->buffer += blen;
925 rq->nr_sectors -= (blen >> 9);
926 rq->current_nr_sectors -= (blen >> 9);
927 rq->sector += (blen >> 9);
928
929 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
930 cdrom_end_request(drive, 1);
931 } else {
932 rq->data_len -= blen;
933
934 /*
935 * The request can't be completed until DRQ is cleared.
936 * So complete the data, but don't complete the request
937 * using the dummy function for the callback feature
938 * of blk_end_request_callback().
939 */
940 if (rq->bio)
941 blk_end_request_callback(rq, 0, blen,
942 cdrom_newpc_intr_dummy_cb);
943 else
944 rq->data += blen;
945 }
946 if (!write && blk_sense_request(rq))
947 rq->sense_len += blen;
948 }
949
950 /* pad, if necessary */
951 if (!blk_fs_request(rq) && len > 0)
952 ide_pad_transfer(drive, write, len);
953
954 if (blk_pc_request(rq)) {
955 timeout = rq->timeout;
956 } else {
957 timeout = ATAPI_WAIT_PC;
958 if (!blk_fs_request(rq))
959 expiry = ide_cd_expiry;
960 }
961
962 hwif->expiry = expiry;
963 ide_set_handler(drive, cdrom_newpc_intr, timeout);
964 return ide_started;
965
966 end_request:
967 if (blk_pc_request(rq)) {
968 unsigned int dlen = rq->data_len;
969
970 if (dma)
971 rq->data_len = 0;
972
973 if (blk_end_request(rq, 0, dlen))
974 BUG();
975
976 hwif->rq = NULL;
977 } else {
978 if (!uptodate)
979 rq->cmd_flags |= REQ_FAILED;
980 cdrom_end_request(drive, uptodate);
981 }
982 return ide_stopped;
983 }
984
985 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
986 {
987 struct cdrom_info *cd = drive->driver_data;
988 int write = rq_data_dir(rq) == WRITE;
989 unsigned short sectors_per_frame =
990 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
991
992 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
993 "secs_per_frame: %u",
994 rq->cmd[0], write, sectors_per_frame);
995
996 if (write) {
997 /* disk has become write protected */
998 if (get_disk_ro(cd->disk)) {
999 cdrom_end_request(drive, 0);
1000 return ide_stopped;
1001 }
1002 } else {
1003 /*
1004 * We may be retrying this request after an error. Fix up any
1005 * weirdness which might be present in the request packet.
1006 */
1007 ide_cd_restore_request(drive, rq);
1008 }
1009
1010 /* use DMA, if possible / writes *must* be hardware frame aligned */
1011 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1012 (rq->sector & (sectors_per_frame - 1))) {
1013 if (write) {
1014 cdrom_end_request(drive, 0);
1015 return ide_stopped;
1016 }
1017 drive->dma = 0;
1018 } else
1019 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1020
1021 if (write)
1022 cd->devinfo.media_written = 1;
1023
1024 return ide_started;
1025 }
1026
1027 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1028 {
1029
1030 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
1031 rq->cmd[0], rq->cmd_type);
1032
1033 if (blk_pc_request(rq))
1034 rq->cmd_flags |= REQ_QUIET;
1035 else
1036 rq->cmd_flags &= ~REQ_FAILED;
1037
1038 drive->dma = 0;
1039
1040 /* sg request */
1041 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1042 struct request_queue *q = drive->queue;
1043 unsigned int alignment;
1044 char *buf;
1045
1046 if (rq->bio)
1047 buf = bio_data(rq->bio);
1048 else
1049 buf = rq->data;
1050
1051 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1052
1053 /*
1054 * check if dma is safe
1055 *
1056 * NOTE! The "len" and "addr" checks should possibly have
1057 * separate masks.
1058 */
1059 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1060 if ((unsigned long)buf & alignment
1061 || rq->data_len & q->dma_pad_mask
1062 || object_is_on_stack(buf))
1063 drive->dma = 0;
1064 }
1065 }
1066
1067 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1068 sector_t block)
1069 {
1070 struct ide_cmd cmd;
1071
1072 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
1073 rq->cmd[0], (unsigned long long)block);
1074
1075 if (drive->debug_mask & IDE_DBG_RQ)
1076 blk_dump_rq_flags(rq, "ide_cd_do_request");
1077
1078 if (blk_fs_request(rq)) {
1079 if (cdrom_start_rw(drive, rq) == ide_stopped)
1080 return ide_stopped;
1081
1082 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1083 return ide_stopped;
1084 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1085 rq->cmd_type == REQ_TYPE_ATA_PC) {
1086 if (!rq->timeout)
1087 rq->timeout = ATAPI_WAIT_PC;
1088
1089 cdrom_do_block_pc(drive, rq);
1090 } else if (blk_special_request(rq)) {
1091 /* right now this can only be a reset... */
1092 cdrom_end_request(drive, 1);
1093 return ide_stopped;
1094 } else {
1095 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1096 cdrom_end_request(drive, 0);
1097 return ide_stopped;
1098 }
1099
1100 memset(&cmd, 0, sizeof(cmd));
1101
1102 if (rq_data_dir(rq))
1103 cmd.tf_flags |= IDE_TFLAG_WRITE;
1104
1105 cmd.rq = rq;
1106
1107 return ide_issue_pc(drive, &cmd);
1108 }
1109
1110 /*
1111 * Ioctl handling.
1112 *
1113 * Routines which queue packet commands take as a final argument a pointer to a
1114 * request_sense struct. If execution of the command results in an error with a
1115 * CHECK CONDITION status, this structure will be filled with the results of the
1116 * subsequent request sense command. The pointer can also be NULL, in which case
1117 * no sense information is returned.
1118 */
1119 static void msf_from_bcd(struct atapi_msf *msf)
1120 {
1121 msf->minute = bcd2bin(msf->minute);
1122 msf->second = bcd2bin(msf->second);
1123 msf->frame = bcd2bin(msf->frame);
1124 }
1125
1126 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1127 {
1128 struct cdrom_info *info = drive->driver_data;
1129 struct cdrom_device_info *cdi = &info->devinfo;
1130 unsigned char cmd[BLK_MAX_CDB];
1131
1132 ide_debug_log(IDE_DBG_FUNC, "enter");
1133
1134 memset(cmd, 0, BLK_MAX_CDB);
1135 cmd[0] = GPCMD_TEST_UNIT_READY;
1136
1137 /*
1138 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1139 * instead of supporting the LOAD_UNLOAD opcode.
1140 */
1141 cmd[7] = cdi->sanyo_slot % 3;
1142
1143 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1144 }
1145
1146 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1147 unsigned long *sectors_per_frame,
1148 struct request_sense *sense)
1149 {
1150 struct {
1151 __be32 lba;
1152 __be32 blocklen;
1153 } capbuf;
1154
1155 int stat;
1156 unsigned char cmd[BLK_MAX_CDB];
1157 unsigned len = sizeof(capbuf);
1158 u32 blocklen;
1159
1160 ide_debug_log(IDE_DBG_FUNC, "enter");
1161
1162 memset(cmd, 0, BLK_MAX_CDB);
1163 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1164
1165 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1166 REQ_QUIET);
1167 if (stat)
1168 return stat;
1169
1170 /*
1171 * Sanity check the given block size
1172 */
1173 blocklen = be32_to_cpu(capbuf.blocklen);
1174 switch (blocklen) {
1175 case 512:
1176 case 1024:
1177 case 2048:
1178 case 4096:
1179 break;
1180 default:
1181 printk(KERN_ERR PFX "%s: weird block size %u\n",
1182 drive->name, blocklen);
1183 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1184 drive->name);
1185 blocklen = 2048;
1186 break;
1187 }
1188
1189 *capacity = 1 + be32_to_cpu(capbuf.lba);
1190 *sectors_per_frame = blocklen >> SECTOR_BITS;
1191
1192 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1193 *capacity, *sectors_per_frame);
1194
1195 return 0;
1196 }
1197
1198 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1199 int format, char *buf, int buflen,
1200 struct request_sense *sense)
1201 {
1202 unsigned char cmd[BLK_MAX_CDB];
1203
1204 ide_debug_log(IDE_DBG_FUNC, "enter");
1205
1206 memset(cmd, 0, BLK_MAX_CDB);
1207
1208 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1209 cmd[6] = trackno;
1210 cmd[7] = (buflen >> 8);
1211 cmd[8] = (buflen & 0xff);
1212 cmd[9] = (format << 6);
1213
1214 if (msf_flag)
1215 cmd[1] = 2;
1216
1217 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1218 }
1219
1220 /* Try to read the entire TOC for the disk into our internal buffer. */
1221 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1222 {
1223 int stat, ntracks, i;
1224 struct cdrom_info *info = drive->driver_data;
1225 struct cdrom_device_info *cdi = &info->devinfo;
1226 struct atapi_toc *toc = info->toc;
1227 struct {
1228 struct atapi_toc_header hdr;
1229 struct atapi_toc_entry ent;
1230 } ms_tmp;
1231 long last_written;
1232 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1233
1234 ide_debug_log(IDE_DBG_FUNC, "enter");
1235
1236 if (toc == NULL) {
1237 /* try to allocate space */
1238 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1239 if (toc == NULL) {
1240 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1241 drive->name);
1242 return -ENOMEM;
1243 }
1244 info->toc = toc;
1245 }
1246
1247 /*
1248 * Check to see if the existing data is still valid. If it is,
1249 * just return.
1250 */
1251 (void) cdrom_check_status(drive, sense);
1252
1253 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1254 return 0;
1255
1256 /* try to get the total cdrom capacity and sector size */
1257 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1258 sense);
1259 if (stat)
1260 toc->capacity = 0x1fffff;
1261
1262 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1263 /* save a private copy of the TOC capacity for error handling */
1264 drive->probed_capacity = toc->capacity * sectors_per_frame;
1265
1266 blk_queue_hardsect_size(drive->queue,
1267 sectors_per_frame << SECTOR_BITS);
1268
1269 /* first read just the header, so we know how long the TOC is */
1270 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1271 sizeof(struct atapi_toc_header), sense);
1272 if (stat)
1273 return stat;
1274
1275 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1276 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1277 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1278 }
1279
1280 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1281 if (ntracks <= 0)
1282 return -EIO;
1283 if (ntracks > MAX_TRACKS)
1284 ntracks = MAX_TRACKS;
1285
1286 /* now read the whole schmeer */
1287 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1288 (char *)&toc->hdr,
1289 sizeof(struct atapi_toc_header) +
1290 (ntracks + 1) *
1291 sizeof(struct atapi_toc_entry), sense);
1292
1293 if (stat && toc->hdr.first_track > 1) {
1294 /*
1295 * Cds with CDI tracks only don't have any TOC entries, despite
1296 * of this the returned values are
1297 * first_track == last_track = number of CDI tracks + 1,
1298 * so that this case is indistinguishable from the same layout
1299 * plus an additional audio track. If we get an error for the
1300 * regular case, we assume a CDI without additional audio
1301 * tracks. In this case the readable TOC is empty (CDI tracks
1302 * are not included) and only holds the Leadout entry.
1303 *
1304 * Heiko Eißfeldt.
1305 */
1306 ntracks = 0;
1307 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1308 (char *)&toc->hdr,
1309 sizeof(struct atapi_toc_header) +
1310 (ntracks + 1) *
1311 sizeof(struct atapi_toc_entry),
1312 sense);
1313 if (stat)
1314 return stat;
1315
1316 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1317 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1318 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1319 } else {
1320 toc->hdr.first_track = CDROM_LEADOUT;
1321 toc->hdr.last_track = CDROM_LEADOUT;
1322 }
1323 }
1324
1325 if (stat)
1326 return stat;
1327
1328 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1329
1330 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1331 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1332 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1333 }
1334
1335 for (i = 0; i <= ntracks; i++) {
1336 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1337 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1338 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1339 msf_from_bcd(&toc->ent[i].addr.msf);
1340 }
1341 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1342 toc->ent[i].addr.msf.second,
1343 toc->ent[i].addr.msf.frame);
1344 }
1345
1346 if (toc->hdr.first_track != CDROM_LEADOUT) {
1347 /* read the multisession information */
1348 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1349 sizeof(ms_tmp), sense);
1350 if (stat)
1351 return stat;
1352
1353 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1354 } else {
1355 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1356 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1357 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1358 }
1359
1360 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1361 /* re-read multisession information using MSF format */
1362 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1363 sizeof(ms_tmp), sense);
1364 if (stat)
1365 return stat;
1366
1367 msf_from_bcd(&ms_tmp.ent.addr.msf);
1368 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1369 ms_tmp.ent.addr.msf.second,
1370 ms_tmp.ent.addr.msf.frame);
1371 }
1372
1373 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1374
1375 /* now try to get the total cdrom capacity */
1376 stat = cdrom_get_last_written(cdi, &last_written);
1377 if (!stat && (last_written > toc->capacity)) {
1378 toc->capacity = last_written;
1379 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1380 drive->probed_capacity = toc->capacity * sectors_per_frame;
1381 }
1382
1383 /* Remember that we've read this stuff. */
1384 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1385
1386 return 0;
1387 }
1388
1389 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1390 {
1391 struct cdrom_info *info = drive->driver_data;
1392 struct cdrom_device_info *cdi = &info->devinfo;
1393 struct packet_command cgc;
1394 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1395
1396 ide_debug_log(IDE_DBG_FUNC, "enter");
1397
1398 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1399 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1400
1401 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1402 do {
1403 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1404 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1405 if (!stat)
1406 break;
1407 } while (--attempts);
1408 return stat;
1409 }
1410
1411 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1412 {
1413 struct cdrom_info *cd = drive->driver_data;
1414 u16 curspeed, maxspeed;
1415
1416 ide_debug_log(IDE_DBG_FUNC, "enter");
1417
1418 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1419 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1420 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1421 } else {
1422 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1423 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1424 }
1425
1426 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1427 curspeed, maxspeed);
1428
1429 cd->current_speed = (curspeed + (176/2)) / 176;
1430 cd->max_speed = (maxspeed + (176/2)) / 176;
1431 }
1432
1433 #define IDE_CD_CAPABILITIES \
1434 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1435 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1436 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1437 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1438 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1439
1440 static struct cdrom_device_ops ide_cdrom_dops = {
1441 .open = ide_cdrom_open_real,
1442 .release = ide_cdrom_release_real,
1443 .drive_status = ide_cdrom_drive_status,
1444 .media_changed = ide_cdrom_check_media_change_real,
1445 .tray_move = ide_cdrom_tray_move,
1446 .lock_door = ide_cdrom_lock_door,
1447 .select_speed = ide_cdrom_select_speed,
1448 .get_last_session = ide_cdrom_get_last_session,
1449 .get_mcn = ide_cdrom_get_mcn,
1450 .reset = ide_cdrom_reset,
1451 .audio_ioctl = ide_cdrom_audio_ioctl,
1452 .capability = IDE_CD_CAPABILITIES,
1453 .generic_packet = ide_cdrom_packet,
1454 };
1455
1456 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1457 {
1458 struct cdrom_info *info = drive->driver_data;
1459 struct cdrom_device_info *devinfo = &info->devinfo;
1460
1461 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1462
1463 devinfo->ops = &ide_cdrom_dops;
1464 devinfo->speed = info->current_speed;
1465 devinfo->capacity = nslots;
1466 devinfo->handle = drive;
1467 strcpy(devinfo->name, drive->name);
1468
1469 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1470 devinfo->mask |= CDC_SELECT_SPEED;
1471
1472 devinfo->disk = info->disk;
1473 return register_cdrom(devinfo);
1474 }
1475
1476 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1477 {
1478 struct cdrom_info *cd = drive->driver_data;
1479 struct cdrom_device_info *cdi = &cd->devinfo;
1480 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1481 mechtype_t mechtype;
1482 int nslots = 1;
1483
1484 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1485 drive->media, drive->atapi_flags);
1486
1487 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1488 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1489 CDC_MO_DRIVE | CDC_RAM);
1490
1491 if (drive->media == ide_optical) {
1492 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1493 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1494 drive->name);
1495 return nslots;
1496 }
1497
1498 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1499 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1500 cdi->mask &= ~CDC_PLAY_AUDIO;
1501 return nslots;
1502 }
1503
1504 /*
1505 * We have to cheat a little here. the packet will eventually be queued
1506 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1507 * Since this device hasn't been registered with the Uniform layer yet,
1508 * it can't do this. Same goes for cdi->ops.
1509 */
1510 cdi->handle = drive;
1511 cdi->ops = &ide_cdrom_dops;
1512
1513 if (ide_cdrom_get_capabilities(drive, buf))
1514 return 0;
1515
1516 if ((buf[8 + 6] & 0x01) == 0)
1517 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1518 if (buf[8 + 6] & 0x08)
1519 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1520 if (buf[8 + 3] & 0x01)
1521 cdi->mask &= ~CDC_CD_R;
1522 if (buf[8 + 3] & 0x02)
1523 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1524 if (buf[8 + 2] & 0x38)
1525 cdi->mask &= ~CDC_DVD;
1526 if (buf[8 + 3] & 0x20)
1527 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1528 if (buf[8 + 3] & 0x10)
1529 cdi->mask &= ~CDC_DVD_R;
1530 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1531 cdi->mask &= ~CDC_PLAY_AUDIO;
1532
1533 mechtype = buf[8 + 6] >> 5;
1534 if (mechtype == mechtype_caddy ||
1535 mechtype == mechtype_popup ||
1536 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1537 cdi->mask |= CDC_CLOSE_TRAY;
1538
1539 if (cdi->sanyo_slot > 0) {
1540 cdi->mask &= ~CDC_SELECT_DISC;
1541 nslots = 3;
1542 } else if (mechtype == mechtype_individual_changer ||
1543 mechtype == mechtype_cartridge_changer) {
1544 nslots = cdrom_number_of_slots(cdi);
1545 if (nslots > 1)
1546 cdi->mask &= ~CDC_SELECT_DISC;
1547 }
1548
1549 ide_cdrom_update_speed(drive, buf);
1550
1551 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1552
1553 /* don't print speed if the drive reported 0 */
1554 if (cd->max_speed)
1555 printk(KERN_CONT " %dX", cd->max_speed);
1556
1557 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1558
1559 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1560 printk(KERN_CONT " DVD%s%s",
1561 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1562 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1563
1564 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1565 printk(KERN_CONT " CD%s%s",
1566 (cdi->mask & CDC_CD_R) ? "" : "-R",
1567 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1568
1569 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1570 printk(KERN_CONT " changer w/%d slots", nslots);
1571 else
1572 printk(KERN_CONT " drive");
1573
1574 printk(KERN_CONT ", %dkB Cache\n",
1575 be16_to_cpup((__be16 *)&buf[8 + 12]));
1576
1577 return nslots;
1578 }
1579
1580 /* standard prep_rq_fn that builds 10 byte cmds */
1581 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1582 {
1583 int hard_sect = queue_hardsect_size(q);
1584 long block = (long)rq->hard_sector / (hard_sect >> 9);
1585 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1586
1587 memset(rq->cmd, 0, BLK_MAX_CDB);
1588
1589 if (rq_data_dir(rq) == READ)
1590 rq->cmd[0] = GPCMD_READ_10;
1591 else
1592 rq->cmd[0] = GPCMD_WRITE_10;
1593
1594 /*
1595 * fill in lba
1596 */
1597 rq->cmd[2] = (block >> 24) & 0xff;
1598 rq->cmd[3] = (block >> 16) & 0xff;
1599 rq->cmd[4] = (block >> 8) & 0xff;
1600 rq->cmd[5] = block & 0xff;
1601
1602 /*
1603 * and transfer length
1604 */
1605 rq->cmd[7] = (blocks >> 8) & 0xff;
1606 rq->cmd[8] = blocks & 0xff;
1607 rq->cmd_len = 10;
1608 return BLKPREP_OK;
1609 }
1610
1611 /*
1612 * Most of the SCSI commands are supported directly by ATAPI devices.
1613 * This transform handles the few exceptions.
1614 */
1615 static int ide_cdrom_prep_pc(struct request *rq)
1616 {
1617 u8 *c = rq->cmd;
1618
1619 /* transform 6-byte read/write commands to the 10-byte version */
1620 if (c[0] == READ_6 || c[0] == WRITE_6) {
1621 c[8] = c[4];
1622 c[5] = c[3];
1623 c[4] = c[2];
1624 c[3] = c[1] & 0x1f;
1625 c[2] = 0;
1626 c[1] &= 0xe0;
1627 c[0] += (READ_10 - READ_6);
1628 rq->cmd_len = 10;
1629 return BLKPREP_OK;
1630 }
1631
1632 /*
1633 * it's silly to pretend we understand 6-byte sense commands, just
1634 * reject with ILLEGAL_REQUEST and the caller should take the
1635 * appropriate action
1636 */
1637 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1638 rq->errors = ILLEGAL_REQUEST;
1639 return BLKPREP_KILL;
1640 }
1641
1642 return BLKPREP_OK;
1643 }
1644
1645 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1646 {
1647 if (blk_fs_request(rq))
1648 return ide_cdrom_prep_fs(q, rq);
1649 else if (blk_pc_request(rq))
1650 return ide_cdrom_prep_pc(rq);
1651
1652 return 0;
1653 }
1654
1655 struct cd_list_entry {
1656 const char *id_model;
1657 const char *id_firmware;
1658 unsigned int cd_flags;
1659 };
1660
1661 #ifdef CONFIG_IDE_PROC_FS
1662 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1663 {
1664 unsigned long capacity, sectors_per_frame;
1665
1666 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1667 return 0;
1668
1669 return capacity * sectors_per_frame;
1670 }
1671
1672 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1673 int count, int *eof, void *data)
1674 {
1675 ide_drive_t *drive = data;
1676 int len;
1677
1678 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1679 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1680 }
1681
1682 static ide_proc_entry_t idecd_proc[] = {
1683 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1684 { NULL, 0, NULL, NULL }
1685 };
1686
1687 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1688 {
1689 return idecd_proc;
1690 }
1691
1692 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1693 {
1694 return NULL;
1695 }
1696 #endif
1697
1698 static const struct cd_list_entry ide_cd_quirks_list[] = {
1699 /* Limit transfer size per interrupt. */
1700 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1701 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1702 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1703 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1704 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1705 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1706 IDE_AFLAG_PRE_ATAPI12, },
1707 /* Vertos 300, some versions of this drive like to talk BCD. */
1708 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1709 /* Vertos 600 ESD. */
1710 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1711 /*
1712 * Sanyo 3 CD changer uses a non-standard command for CD changing
1713 * (by default standard ATAPI support for CD changers is used).
1714 */
1715 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1716 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1717 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1718 /* Stingray 8X CD-ROM. */
1719 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1720 /*
1721 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1722 * mode sense page capabilities size, but older drives break.
1723 */
1724 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1725 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1726 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1727 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1728 /*
1729 * Some drives used by Apple don't advertise audio play
1730 * but they do support reading TOC & audio datas.
1731 */
1732 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1733 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1734 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1735 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1736 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1737 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1738 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1739 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1740 { NULL, NULL, 0 }
1741 };
1742
1743 static unsigned int ide_cd_flags(u16 *id)
1744 {
1745 const struct cd_list_entry *cle = ide_cd_quirks_list;
1746
1747 while (cle->id_model) {
1748 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1749 (cle->id_firmware == NULL ||
1750 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1751 return cle->cd_flags;
1752 cle++;
1753 }
1754
1755 return 0;
1756 }
1757
1758 static int ide_cdrom_setup(ide_drive_t *drive)
1759 {
1760 struct cdrom_info *cd = drive->driver_data;
1761 struct cdrom_device_info *cdi = &cd->devinfo;
1762 u16 *id = drive->id;
1763 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1764 int nslots;
1765
1766 ide_debug_log(IDE_DBG_PROBE, "enter");
1767
1768 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1769 blk_queue_dma_alignment(drive->queue, 31);
1770 blk_queue_update_dma_pad(drive->queue, 15);
1771 drive->queue->unplug_delay = (1 * HZ) / 1000;
1772 if (!drive->queue->unplug_delay)
1773 drive->queue->unplug_delay = 1;
1774
1775 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1776 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1777
1778 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1779 fw_rev[4] == '1' && fw_rev[6] <= '2')
1780 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1781 IDE_AFLAG_TOCADDR_AS_BCD);
1782 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1783 fw_rev[4] == '1' && fw_rev[6] <= '2')
1784 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1785 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1786 /* 3 => use CD in slot 0 */
1787 cdi->sanyo_slot = 3;
1788
1789 nslots = ide_cdrom_probe_capabilities(drive);
1790
1791 /* set correct block size */
1792 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1793
1794 if (ide_cdrom_register(drive, nslots)) {
1795 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1796 " cdrom driver.\n", drive->name, __func__);
1797 cd->devinfo.handle = NULL;
1798 return 1;
1799 }
1800
1801 ide_proc_register_driver(drive, cd->driver);
1802 return 0;
1803 }
1804
1805 static void ide_cd_remove(ide_drive_t *drive)
1806 {
1807 struct cdrom_info *info = drive->driver_data;
1808
1809 ide_debug_log(IDE_DBG_FUNC, "enter");
1810
1811 ide_proc_unregister_driver(drive, info->driver);
1812 device_del(&info->dev);
1813 del_gendisk(info->disk);
1814
1815 mutex_lock(&idecd_ref_mutex);
1816 put_device(&info->dev);
1817 mutex_unlock(&idecd_ref_mutex);
1818 }
1819
1820 static void ide_cd_release(struct device *dev)
1821 {
1822 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1823 struct cdrom_device_info *devinfo = &info->devinfo;
1824 ide_drive_t *drive = info->drive;
1825 struct gendisk *g = info->disk;
1826
1827 ide_debug_log(IDE_DBG_FUNC, "enter");
1828
1829 kfree(info->toc);
1830 if (devinfo->handle == drive)
1831 unregister_cdrom(devinfo);
1832 drive->driver_data = NULL;
1833 blk_queue_prep_rq(drive->queue, NULL);
1834 g->private_data = NULL;
1835 put_disk(g);
1836 kfree(info);
1837 }
1838
1839 static int ide_cd_probe(ide_drive_t *);
1840
1841 static struct ide_driver ide_cdrom_driver = {
1842 .gen_driver = {
1843 .owner = THIS_MODULE,
1844 .name = "ide-cdrom",
1845 .bus = &ide_bus_type,
1846 },
1847 .probe = ide_cd_probe,
1848 .remove = ide_cd_remove,
1849 .version = IDECD_VERSION,
1850 .do_request = ide_cd_do_request,
1851 #ifdef CONFIG_IDE_PROC_FS
1852 .proc_entries = ide_cd_proc_entries,
1853 .proc_devsets = ide_cd_proc_devsets,
1854 #endif
1855 };
1856
1857 static int idecd_open(struct block_device *bdev, fmode_t mode)
1858 {
1859 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1860 int rc = -ENOMEM;
1861
1862 if (!info)
1863 return -ENXIO;
1864
1865 rc = cdrom_open(&info->devinfo, bdev, mode);
1866
1867 if (rc < 0)
1868 ide_cd_put(info);
1869
1870 return rc;
1871 }
1872
1873 static int idecd_release(struct gendisk *disk, fmode_t mode)
1874 {
1875 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1876
1877 cdrom_release(&info->devinfo, mode);
1878
1879 ide_cd_put(info);
1880
1881 return 0;
1882 }
1883
1884 static int idecd_set_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 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1892 return -EFAULT;
1893
1894 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1895
1896 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1897 if (stat)
1898 return stat;
1899
1900 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1901 return cdrom_mode_select(cdi, &cgc);
1902 }
1903
1904 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1905 {
1906 struct packet_command cgc;
1907 char buffer[16];
1908 int stat;
1909 char spindown;
1910
1911 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1912
1913 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1914 if (stat)
1915 return stat;
1916
1917 spindown = buffer[11] & 0x0f;
1918 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1919 return -EFAULT;
1920 return 0;
1921 }
1922
1923 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1924 unsigned int cmd, unsigned long arg)
1925 {
1926 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1927 int err;
1928
1929 switch (cmd) {
1930 case CDROMSETSPINDOWN:
1931 return idecd_set_spindown(&info->devinfo, arg);
1932 case CDROMGETSPINDOWN:
1933 return idecd_get_spindown(&info->devinfo, arg);
1934 default:
1935 break;
1936 }
1937
1938 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1939 if (err == -EINVAL)
1940 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1941
1942 return err;
1943 }
1944
1945 static int idecd_media_changed(struct gendisk *disk)
1946 {
1947 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1948 return cdrom_media_changed(&info->devinfo);
1949 }
1950
1951 static int idecd_revalidate_disk(struct gendisk *disk)
1952 {
1953 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1954 struct request_sense sense;
1955
1956 ide_cd_read_toc(info->drive, &sense);
1957
1958 return 0;
1959 }
1960
1961 static struct block_device_operations idecd_ops = {
1962 .owner = THIS_MODULE,
1963 .open = idecd_open,
1964 .release = idecd_release,
1965 .locked_ioctl = idecd_ioctl,
1966 .media_changed = idecd_media_changed,
1967 .revalidate_disk = idecd_revalidate_disk
1968 };
1969
1970 /* module options */
1971 static char *ignore;
1972 module_param(ignore, charp, 0400);
1973
1974 static unsigned long debug_mask;
1975 module_param(debug_mask, ulong, 0644);
1976
1977 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1978
1979 static int ide_cd_probe(ide_drive_t *drive)
1980 {
1981 struct cdrom_info *info;
1982 struct gendisk *g;
1983 struct request_sense sense;
1984
1985 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1986 drive->driver_req, drive->media);
1987
1988 if (!strstr("ide-cdrom", drive->driver_req))
1989 goto failed;
1990
1991 if (drive->media != ide_cdrom && drive->media != ide_optical)
1992 goto failed;
1993
1994 /* skip drives that we were told to ignore */
1995 if (ignore != NULL) {
1996 if (strstr(ignore, drive->name)) {
1997 printk(KERN_INFO PFX "ignoring drive %s\n",
1998 drive->name);
1999 goto failed;
2000 }
2001 }
2002
2003 drive->debug_mask = debug_mask;
2004 drive->irq_handler = cdrom_newpc_intr;
2005
2006 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2007 if (info == NULL) {
2008 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2009 drive->name);
2010 goto failed;
2011 }
2012
2013 g = alloc_disk(1 << PARTN_BITS);
2014 if (!g)
2015 goto out_free_cd;
2016
2017 ide_init_disk(g, drive);
2018
2019 info->dev.parent = &drive->gendev;
2020 info->dev.release = ide_cd_release;
2021 dev_set_name(&info->dev, dev_name(&drive->gendev));
2022
2023 if (device_register(&info->dev))
2024 goto out_free_disk;
2025
2026 info->drive = drive;
2027 info->driver = &ide_cdrom_driver;
2028 info->disk = g;
2029
2030 g->private_data = &info->driver;
2031
2032 drive->driver_data = info;
2033
2034 g->minors = 1;
2035 g->driverfs_dev = &drive->gendev;
2036 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2037 if (ide_cdrom_setup(drive)) {
2038 put_device(&info->dev);
2039 goto failed;
2040 }
2041
2042 ide_cd_read_toc(drive, &sense);
2043 g->fops = &idecd_ops;
2044 g->flags |= GENHD_FL_REMOVABLE;
2045 add_disk(g);
2046 return 0;
2047
2048 out_free_disk:
2049 put_disk(g);
2050 out_free_cd:
2051 kfree(info);
2052 failed:
2053 return -ENODEV;
2054 }
2055
2056 static void __exit ide_cdrom_exit(void)
2057 {
2058 driver_unregister(&ide_cdrom_driver.gen_driver);
2059 }
2060
2061 static int __init ide_cdrom_init(void)
2062 {
2063 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2064 return driver_register(&ide_cdrom_driver.gen_driver);
2065 }
2066
2067 MODULE_ALIAS("ide:*m-cdrom*");
2068 MODULE_ALIAS("ide-cd");
2069 module_init(ide_cdrom_init);
2070 module_exit(ide_cdrom_exit);
2071 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree