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Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define 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 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
56
57 #define ide_cd_g(disk) \
58 container_of((disk)->private_data, struct cdrom_info, driver)
59
60 static void ide_cd_release(struct kref *);
61
62 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
63 {
64 struct cdrom_info *cd = NULL;
65
66 mutex_lock(&idecd_ref_mutex);
67 cd = ide_cd_g(disk);
68 if (cd) {
69 if (ide_device_get(cd->drive))
70 cd = NULL;
71 else
72 kref_get(&cd->kref);
73
74 }
75 mutex_unlock(&idecd_ref_mutex);
76 return cd;
77 }
78
79 static void ide_cd_put(struct cdrom_info *cd)
80 {
81 ide_drive_t *drive = cd->drive;
82
83 mutex_lock(&idecd_ref_mutex);
84 kref_put(&cd->kref, ide_cd_release);
85 ide_device_put(drive);
86 mutex_unlock(&idecd_ref_mutex);
87 }
88
89 /*
90 * Generic packet command support and error handling routines.
91 */
92
93 /* Mark that we've seen a media change and invalidate our internal buffers. */
94 static void cdrom_saw_media_change(ide_drive_t *drive)
95 {
96 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
97 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
98 }
99
100 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
101 struct request_sense *sense)
102 {
103 int log = 0;
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 if (!cdrom_log_sense(drive, failed_command, sense))
154 return;
155
156 /*
157 * If a read toc is executed for a CD-R or CD-RW medium where the first
158 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
159 * confusing error)
160 */
161 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
162 if (sense->sense_key == 0x05 && sense->asc == 0x24)
163 return;
164
165 /* current error */
166 if (sense->error_code == 0x70) {
167 switch (sense->sense_key) {
168 case MEDIUM_ERROR:
169 case VOLUME_OVERFLOW:
170 case ILLEGAL_REQUEST:
171 if (!sense->valid)
172 break;
173 if (failed_command == NULL ||
174 !blk_fs_request(failed_command))
175 break;
176 sector = (sense->information[0] << 24) |
177 (sense->information[1] << 16) |
178 (sense->information[2] << 8) |
179 (sense->information[3]);
180
181 if (drive->queue->hardsect_size == 2048)
182 /* device sector size is 2K */
183 sector <<= 2;
184
185 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
186 sector &= ~(bio_sectors - 1);
187
188 if (sector < get_capacity(info->disk) &&
189 drive->probed_capacity - sector < 4 * 75)
190 set_capacity(info->disk, sector);
191 }
192 }
193
194 ide_cd_log_error(drive->name, failed_command, sense);
195 }
196
197 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
198 struct request *failed_command)
199 {
200 struct cdrom_info *info = drive->driver_data;
201 struct request *rq = &info->request_sense_request;
202
203 if (sense == NULL)
204 sense = &info->sense_data;
205
206 /* stuff the sense request in front of our current request */
207 blk_rq_init(NULL, rq);
208 rq->cmd_type = REQ_TYPE_ATA_PC;
209 rq->rq_disk = info->disk;
210
211 rq->data = sense;
212 rq->cmd[0] = GPCMD_REQUEST_SENSE;
213 rq->cmd[4] = 18;
214 rq->data_len = 18;
215
216 rq->cmd_type = REQ_TYPE_SENSE;
217 rq->cmd_flags |= REQ_PREEMPT;
218
219 /* NOTE! Save the failed command in "rq->buffer" */
220 rq->buffer = (void *) failed_command;
221
222 ide_do_drive_cmd(drive, rq);
223 }
224
225 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
226 {
227 struct request *rq = HWGROUP(drive)->rq;
228 int nsectors = rq->hard_cur_sectors;
229
230 if (blk_sense_request(rq) && uptodate) {
231 /*
232 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
233 * failed request
234 */
235 struct request *failed = (struct request *) rq->buffer;
236 struct cdrom_info *info = drive->driver_data;
237 void *sense = &info->sense_data;
238 unsigned long flags;
239
240 if (failed) {
241 if (failed->sense) {
242 sense = failed->sense;
243 failed->sense_len = rq->sense_len;
244 }
245 cdrom_analyze_sense_data(drive, failed, sense);
246 /*
247 * now end the failed request
248 */
249 if (blk_fs_request(failed)) {
250 if (ide_end_dequeued_request(drive, failed, 0,
251 failed->hard_nr_sectors))
252 BUG();
253 } else {
254 spin_lock_irqsave(&ide_lock, flags);
255 if (__blk_end_request(failed, -EIO,
256 failed->data_len))
257 BUG();
258 spin_unlock_irqrestore(&ide_lock, flags);
259 }
260 } else
261 cdrom_analyze_sense_data(drive, NULL, sense);
262 }
263
264 if (!rq->current_nr_sectors && blk_fs_request(rq))
265 uptodate = 1;
266 /* make sure it's fully ended */
267 if (blk_pc_request(rq))
268 nsectors = (rq->data_len + 511) >> 9;
269 if (!nsectors)
270 nsectors = 1;
271
272 ide_end_request(drive, uptodate, nsectors);
273 }
274
275 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
276 {
277 if (st & 0x80)
278 return;
279 ide_dump_status(drive, msg, st);
280 }
281
282 /*
283 * Returns:
284 * 0: if the request should be continued.
285 * 1: if the request was ended.
286 */
287 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
288 {
289 ide_hwif_t *hwif = drive->hwif;
290 struct request *rq = hwif->hwgroup->rq;
291 int stat, err, sense_key;
292
293 /* check for errors */
294 stat = hwif->tp_ops->read_status(hwif);
295
296 if (stat_ret)
297 *stat_ret = stat;
298
299 if (OK_STAT(stat, good_stat, BAD_R_STAT))
300 return 0;
301
302 /* get the IDE error register */
303 err = ide_read_error(drive);
304 sense_key = err >> 4;
305
306 if (rq == NULL) {
307 printk(KERN_ERR "%s: missing rq in %s\n",
308 drive->name, __func__);
309 return 1;
310 }
311
312 if (blk_sense_request(rq)) {
313 /*
314 * We got an error trying to get sense info from the drive
315 * (probably while trying to recover from a former error).
316 * Just give up.
317 */
318 rq->cmd_flags |= REQ_FAILED;
319 cdrom_end_request(drive, 0);
320 ide_error(drive, "request sense failure", stat);
321 return 1;
322
323 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
324 /* All other functions, except for READ. */
325
326 /*
327 * if we have an error, pass back CHECK_CONDITION as the
328 * scsi status byte
329 */
330 if (blk_pc_request(rq) && !rq->errors)
331 rq->errors = SAM_STAT_CHECK_CONDITION;
332
333 /* check for tray open */
334 if (sense_key == NOT_READY) {
335 cdrom_saw_media_change(drive);
336 } else if (sense_key == UNIT_ATTENTION) {
337 /* check for media change */
338 cdrom_saw_media_change(drive);
339 return 0;
340 } else if (sense_key == ILLEGAL_REQUEST &&
341 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
342 /*
343 * Don't print error message for this condition--
344 * SFF8090i indicates that 5/24/00 is the correct
345 * response to a request to close the tray if the
346 * drive doesn't have that capability.
347 * cdrom_log_sense() knows this!
348 */
349 } else if (!(rq->cmd_flags & REQ_QUIET)) {
350 /* otherwise, print an error */
351 ide_dump_status(drive, "packet command error", stat);
352 }
353
354 rq->cmd_flags |= REQ_FAILED;
355
356 /*
357 * instead of playing games with moving completions around,
358 * remove failed request completely and end it when the
359 * request sense has completed
360 */
361 goto end_request;
362
363 } else if (blk_fs_request(rq)) {
364 int do_end_request = 0;
365
366 /* handle errors from READ and WRITE requests */
367
368 if (blk_noretry_request(rq))
369 do_end_request = 1;
370
371 if (sense_key == NOT_READY) {
372 /* tray open */
373 if (rq_data_dir(rq) == READ) {
374 cdrom_saw_media_change(drive);
375
376 /* fail the request */
377 printk(KERN_ERR "%s: tray open\n", drive->name);
378 do_end_request = 1;
379 } else {
380 struct cdrom_info *info = drive->driver_data;
381
382 /*
383 * Allow the drive 5 seconds to recover, some
384 * devices will return this error while flushing
385 * data from cache.
386 */
387 if (!rq->errors)
388 info->write_timeout = jiffies +
389 ATAPI_WAIT_WRITE_BUSY;
390 rq->errors = 1;
391 if (time_after(jiffies, info->write_timeout))
392 do_end_request = 1;
393 else {
394 unsigned long flags;
395
396 /*
397 * take a breather relying on the unplug
398 * timer to kick us again
399 */
400 spin_lock_irqsave(&ide_lock, flags);
401 blk_plug_device(drive->queue);
402 spin_unlock_irqrestore(&ide_lock,
403 flags);
404 return 1;
405 }
406 }
407 } else if (sense_key == UNIT_ATTENTION) {
408 /* media change */
409 cdrom_saw_media_change(drive);
410
411 /*
412 * Arrange to retry the request but be sure to give up
413 * if we've retried too many times.
414 */
415 if (++rq->errors > ERROR_MAX)
416 do_end_request = 1;
417 } else if (sense_key == ILLEGAL_REQUEST ||
418 sense_key == DATA_PROTECT) {
419 /*
420 * No point in retrying after an illegal request or data
421 * protect error.
422 */
423 ide_dump_status_no_sense(drive, "command error", stat);
424 do_end_request = 1;
425 } else if (sense_key == MEDIUM_ERROR) {
426 /*
427 * No point in re-trying a zillion times on a bad
428 * sector. If we got here the error is not correctable.
429 */
430 ide_dump_status_no_sense(drive,
431 "media error (bad sector)",
432 stat);
433 do_end_request = 1;
434 } else if (sense_key == BLANK_CHECK) {
435 /* disk appears blank ?? */
436 ide_dump_status_no_sense(drive, "media error (blank)",
437 stat);
438 do_end_request = 1;
439 } else if ((err & ~ATA_ABORTED) != 0) {
440 /* go to the default handler for other errors */
441 ide_error(drive, "cdrom_decode_status", stat);
442 return 1;
443 } else if ((++rq->errors > ERROR_MAX)) {
444 /* we've racked up too many retries, abort */
445 do_end_request = 1;
446 }
447
448 /*
449 * End a request through request sense analysis when we have
450 * sense data. We need this in order to perform end of media
451 * processing.
452 */
453 if (do_end_request)
454 goto end_request;
455
456 /*
457 * If we got a CHECK_CONDITION status, queue
458 * a request sense command.
459 */
460 if (stat & ATA_ERR)
461 cdrom_queue_request_sense(drive, NULL, NULL);
462 } else {
463 blk_dump_rq_flags(rq, "ide-cd: bad rq");
464 cdrom_end_request(drive, 0);
465 }
466
467 /* retry, or handle the next request */
468 return 1;
469
470 end_request:
471 if (stat & ATA_ERR) {
472 unsigned long flags;
473
474 spin_lock_irqsave(&ide_lock, flags);
475 blkdev_dequeue_request(rq);
476 HWGROUP(drive)->rq = NULL;
477 spin_unlock_irqrestore(&ide_lock, flags);
478
479 cdrom_queue_request_sense(drive, rq->sense, rq);
480 } else
481 cdrom_end_request(drive, 0);
482
483 return 1;
484 }
485
486 static int cdrom_timer_expiry(ide_drive_t *drive)
487 {
488 struct request *rq = HWGROUP(drive)->rq;
489 unsigned long wait = 0;
490
491 /*
492 * Some commands are *slow* and normally take a long time to complete.
493 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
494 * commands/drives support that. Let ide_timer_expiry keep polling us
495 * for these.
496 */
497 switch (rq->cmd[0]) {
498 case GPCMD_BLANK:
499 case GPCMD_FORMAT_UNIT:
500 case GPCMD_RESERVE_RZONE_TRACK:
501 case GPCMD_CLOSE_TRACK:
502 case GPCMD_FLUSH_CACHE:
503 wait = ATAPI_WAIT_PC;
504 break;
505 default:
506 if (!(rq->cmd_flags & REQ_QUIET))
507 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
508 rq->cmd[0]);
509 wait = 0;
510 break;
511 }
512 return wait;
513 }
514
515 /*
516 * Set up the device registers for transferring a packet command on DEV,
517 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
518 * which actually transfers the command to the drive. If this is a
519 * drq_interrupt device, this routine will arrange for HANDLER to be
520 * called when the interrupt from the drive arrives. Otherwise, HANDLER
521 * will be called immediately after the drive is prepared for the transfer.
522 */
523 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
524 int xferlen,
525 ide_handler_t *handler)
526 {
527 struct cdrom_info *info = drive->driver_data;
528 ide_hwif_t *hwif = drive->hwif;
529
530 /* FIXME: for Virtual DMA we must check harder */
531 if (info->dma)
532 info->dma = !hwif->dma_ops->dma_setup(drive);
533
534 /* set up the controller registers */
535 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
536 xferlen, info->dma);
537
538 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
539 /* waiting for CDB interrupt, not DMA yet. */
540 if (info->dma)
541 drive->waiting_for_dma = 0;
542
543 /* packet command */
544 ide_execute_command(drive, ATA_CMD_PACKET, handler,
545 ATAPI_WAIT_PC, cdrom_timer_expiry);
546 return ide_started;
547 } else {
548 ide_execute_pkt_cmd(drive);
549
550 return (*handler) (drive);
551 }
552 }
553
554 /*
555 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
556 * registers must have already been prepared by cdrom_start_packet_command.
557 * HANDLER is the interrupt handler to call when the command completes or
558 * there's data ready.
559 */
560 #define ATAPI_MIN_CDB_BYTES 12
561 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
562 struct request *rq,
563 ide_handler_t *handler)
564 {
565 ide_hwif_t *hwif = drive->hwif;
566 int cmd_len;
567 struct cdrom_info *info = drive->driver_data;
568 ide_startstop_t startstop;
569
570 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
571 /*
572 * Here we should have been called after receiving an interrupt
573 * from the device. DRQ should how be set.
574 */
575
576 /* check for errors */
577 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
578 return ide_stopped;
579
580 /* ok, next interrupt will be DMA interrupt */
581 if (info->dma)
582 drive->waiting_for_dma = 1;
583 } else {
584 /* otherwise, we must wait for DRQ to get set */
585 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
586 ATA_BUSY, WAIT_READY))
587 return startstop;
588 }
589
590 /* arm the interrupt handler */
591 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
592
593 /* ATAPI commands get padded out to 12 bytes minimum */
594 cmd_len = COMMAND_SIZE(rq->cmd[0]);
595 if (cmd_len < ATAPI_MIN_CDB_BYTES)
596 cmd_len = ATAPI_MIN_CDB_BYTES;
597
598 /* send the command to the device */
599 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
600
601 /* start the DMA if need be */
602 if (info->dma)
603 hwif->dma_ops->dma_start(drive);
604
605 return ide_started;
606 }
607
608 /*
609 * Check the contents of the interrupt reason register from the cdrom
610 * and attempt to recover if there are problems. Returns 0 if everything's
611 * ok; nonzero if the request has been terminated.
612 */
613 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
614 int len, int ireason, int rw)
615 {
616 ide_hwif_t *hwif = drive->hwif;
617
618 /*
619 * ireason == 0: the drive wants to receive data from us
620 * ireason == 2: the drive is expecting to transfer data to us
621 */
622 if (ireason == (!rw << 1))
623 return 0;
624 else if (ireason == (rw << 1)) {
625
626 /* whoops... */
627 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
628 drive->name, __func__);
629
630 ide_pad_transfer(drive, rw, len);
631 } else if (rw == 0 && ireason == 1) {
632 /*
633 * Some drives (ASUS) seem to tell us that status info is
634 * available. Just get it and ignore.
635 */
636 (void)hwif->tp_ops->read_status(hwif);
637 return 0;
638 } else {
639 /* drive wants a command packet, or invalid ireason... */
640 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
641 drive->name, __func__, ireason);
642 }
643
644 if (rq->cmd_type == REQ_TYPE_ATA_PC)
645 rq->cmd_flags |= REQ_FAILED;
646
647 cdrom_end_request(drive, 0);
648 return -1;
649 }
650
651 /*
652 * Assume that the drive will always provide data in multiples of at least
653 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
654 */
655 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
656 {
657 if ((len % SECTOR_SIZE) == 0)
658 return 0;
659
660 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
661 drive->name, __func__, len);
662
663 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
664 printk(KERN_ERR " This drive is not supported by "
665 "this version of the driver\n");
666 else {
667 printk(KERN_ERR " Trying to limit transfer sizes\n");
668 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
669 }
670
671 return 1;
672 }
673
674 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
675
676 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
677 struct request *rq)
678 {
679 if (rq_data_dir(rq) == READ) {
680 unsigned short sectors_per_frame =
681 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
682 int nskip = rq->sector & (sectors_per_frame - 1);
683
684 /*
685 * If the requested sector doesn't start on a frame boundary,
686 * we must adjust the start of the transfer so that it does,
687 * and remember to skip the first few sectors.
688 *
689 * If the rq->current_nr_sectors field is larger than the size
690 * of the buffer, it will mean that we're to skip a number of
691 * sectors equal to the amount by which rq->current_nr_sectors
692 * is larger than the buffer size.
693 */
694 if (nskip > 0) {
695 /* sanity check... */
696 if (rq->current_nr_sectors !=
697 bio_cur_sectors(rq->bio)) {
698 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
699 drive->name, __func__,
700 rq->current_nr_sectors);
701 cdrom_end_request(drive, 0);
702 return ide_stopped;
703 }
704 rq->current_nr_sectors += nskip;
705 }
706 }
707 #if 0
708 else
709 /* the immediate bit */
710 rq->cmd[1] = 1 << 3;
711 #endif
712 /* set up the command */
713 rq->timeout = ATAPI_WAIT_PC;
714
715 return ide_started;
716 }
717
718 /*
719 * Routine to send a read/write packet command to the drive. This is usually
720 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
721 * devices, it is called from an interrupt when the drive is ready to accept
722 * the command.
723 */
724 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
725 {
726 struct request *rq = drive->hwif->hwgroup->rq;
727
728 /* send the command to the drive and return */
729 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
730 }
731
732 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
733 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
734 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
735
736 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
737 {
738 struct cdrom_info *info = drive->driver_data;
739 int stat;
740 static int retry = 10;
741
742 if (cdrom_decode_status(drive, 0, &stat))
743 return ide_stopped;
744
745 drive->atapi_flags |= IDE_AFLAG_SEEKING;
746
747 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
748 if (--retry == 0)
749 drive->dsc_overlap = 0;
750 }
751 return ide_stopped;
752 }
753
754 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
755 {
756 sector_t frame = rq->sector;
757
758 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
759
760 memset(rq->cmd, 0, BLK_MAX_CDB);
761 rq->cmd[0] = GPCMD_SEEK;
762 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
763
764 rq->timeout = ATAPI_WAIT_PC;
765 }
766
767 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
768 {
769 struct request *rq = drive->hwif->hwgroup->rq;
770
771 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
772 }
773
774 /*
775 * Fix up a possibly partially-processed request so that we can start it over
776 * entirely, or even put it back on the request queue.
777 */
778 static void restore_request(struct request *rq)
779 {
780 if (rq->buffer != bio_data(rq->bio)) {
781 sector_t n =
782 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
783
784 rq->buffer = bio_data(rq->bio);
785 rq->nr_sectors += n;
786 rq->sector -= n;
787 }
788 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
789 rq->hard_cur_sectors = rq->current_nr_sectors;
790 rq->hard_nr_sectors = rq->nr_sectors;
791 rq->hard_sector = rq->sector;
792 rq->q->prep_rq_fn(rq->q, rq);
793 }
794
795 /*
796 * All other packet commands.
797 */
798 static void ide_cd_request_sense_fixup(struct request *rq)
799 {
800 /*
801 * Some of the trailing request sense fields are optional,
802 * and some drives don't send them. Sigh.
803 */
804 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
805 rq->data_len > 0 && rq->data_len <= 5)
806 while (rq->data_len > 0) {
807 *(u8 *)rq->data++ = 0;
808 --rq->data_len;
809 }
810 }
811
812 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
813 int write, void *buffer, unsigned *bufflen,
814 struct request_sense *sense, int timeout,
815 unsigned int cmd_flags)
816 {
817 struct cdrom_info *info = drive->driver_data;
818 struct request_sense local_sense;
819 int retries = 10;
820 unsigned int flags = 0;
821
822 if (!sense)
823 sense = &local_sense;
824
825 /* start of retry loop */
826 do {
827 struct request *rq;
828 int error;
829
830 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
831
832 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
833 rq->cmd_type = REQ_TYPE_ATA_PC;
834 rq->sense = sense;
835 rq->cmd_flags |= cmd_flags;
836 rq->timeout = timeout;
837 if (buffer) {
838 rq->data = buffer;
839 rq->data_len = *bufflen;
840 }
841
842 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
843
844 if (buffer)
845 *bufflen = rq->data_len;
846
847 flags = rq->cmd_flags;
848 blk_put_request(rq);
849
850 /*
851 * FIXME: we should probably abort/retry or something in case of
852 * failure.
853 */
854 if (flags & REQ_FAILED) {
855 /*
856 * The request failed. Retry if it was due to a unit
857 * attention status (usually means media was changed).
858 */
859 struct request_sense *reqbuf = sense;
860
861 if (reqbuf->sense_key == UNIT_ATTENTION)
862 cdrom_saw_media_change(drive);
863 else if (reqbuf->sense_key == NOT_READY &&
864 reqbuf->asc == 4 && reqbuf->ascq != 4) {
865 /*
866 * The drive is in the process of loading
867 * a disk. Retry, but wait a little to give
868 * the drive time to complete the load.
869 */
870 ssleep(2);
871 } else {
872 /* otherwise, don't retry */
873 retries = 0;
874 }
875 --retries;
876 }
877
878 /* end of retry loop */
879 } while ((flags & REQ_FAILED) && retries >= 0);
880
881 /* return an error if the command failed */
882 return (flags & REQ_FAILED) ? -EIO : 0;
883 }
884
885 /*
886 * Called from blk_end_request_callback() after the data of the request is
887 * completed and before the request itself is completed. By returning value '1',
888 * blk_end_request_callback() returns immediately without completing it.
889 */
890 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
891 {
892 return 1;
893 }
894
895 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
896 {
897 ide_hwif_t *hwif = drive->hwif;
898 struct cdrom_info *info = drive->driver_data;
899 struct request *rq = HWGROUP(drive)->rq;
900 xfer_func_t *xferfunc;
901 ide_expiry_t *expiry = NULL;
902 int dma_error = 0, dma, stat, thislen, uptodate = 0;
903 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
904 unsigned int timeout;
905 u16 len;
906 u8 ireason;
907
908 /* check for errors */
909 dma = info->dma;
910 if (dma) {
911 info->dma = 0;
912 dma_error = hwif->dma_ops->dma_end(drive);
913 if (dma_error) {
914 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
915 write ? "write" : "read");
916 ide_dma_off(drive);
917 }
918 }
919
920 if (cdrom_decode_status(drive, 0, &stat))
921 return ide_stopped;
922
923 /* using dma, transfer is complete now */
924 if (dma) {
925 if (dma_error)
926 return ide_error(drive, "dma error", stat);
927 if (blk_fs_request(rq)) {
928 ide_end_request(drive, 1, rq->nr_sectors);
929 return ide_stopped;
930 }
931 goto end_request;
932 }
933
934 ide_read_bcount_and_ireason(drive, &len, &ireason);
935
936 thislen = blk_fs_request(rq) ? len : rq->data_len;
937 if (thislen > len)
938 thislen = len;
939
940 /* If DRQ is clear, the command has completed. */
941 if ((stat & ATA_DRQ) == 0) {
942 if (blk_fs_request(rq)) {
943 /*
944 * If we're not done reading/writing, complain.
945 * Otherwise, complete the command normally.
946 */
947 uptodate = 1;
948 if (rq->current_nr_sectors > 0) {
949 printk(KERN_ERR "%s: %s: data underrun "
950 "(%d blocks)\n",
951 drive->name, __func__,
952 rq->current_nr_sectors);
953 if (!write)
954 rq->cmd_flags |= REQ_FAILED;
955 uptodate = 0;
956 }
957 cdrom_end_request(drive, uptodate);
958 return ide_stopped;
959 } else if (!blk_pc_request(rq)) {
960 ide_cd_request_sense_fixup(rq);
961 /* complain if we still have data left to transfer */
962 uptodate = rq->data_len ? 0 : 1;
963 }
964 goto end_request;
965 }
966
967 /* check which way to transfer data */
968 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
969 return ide_stopped;
970
971 if (blk_fs_request(rq)) {
972 if (write == 0) {
973 int nskip;
974
975 if (ide_cd_check_transfer_size(drive, len)) {
976 cdrom_end_request(drive, 0);
977 return ide_stopped;
978 }
979
980 /*
981 * First, figure out if we need to bit-bucket
982 * any of the leading sectors.
983 */
984 nskip = min_t(int, rq->current_nr_sectors
985 - bio_cur_sectors(rq->bio),
986 thislen >> 9);
987 if (nskip > 0) {
988 ide_pad_transfer(drive, write, nskip << 9);
989 rq->current_nr_sectors -= nskip;
990 thislen -= (nskip << 9);
991 }
992 }
993 }
994
995 if (ireason == 0) {
996 write = 1;
997 xferfunc = hwif->tp_ops->output_data;
998 } else {
999 write = 0;
1000 xferfunc = hwif->tp_ops->input_data;
1001 }
1002
1003 /* transfer data */
1004 while (thislen > 0) {
1005 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1006 int blen = rq->data_len;
1007
1008 /* bio backed? */
1009 if (rq->bio) {
1010 if (blk_fs_request(rq)) {
1011 ptr = rq->buffer;
1012 blen = rq->current_nr_sectors << 9;
1013 } else {
1014 ptr = bio_data(rq->bio);
1015 blen = bio_iovec(rq->bio)->bv_len;
1016 }
1017 }
1018
1019 if (!ptr) {
1020 if (blk_fs_request(rq) && !write)
1021 /*
1022 * If the buffers are full, pipe the rest into
1023 * oblivion.
1024 */
1025 ide_pad_transfer(drive, 0, thislen);
1026 else {
1027 printk(KERN_ERR "%s: confused, missing data\n",
1028 drive->name);
1029 blk_dump_rq_flags(rq, rq_data_dir(rq)
1030 ? "cdrom_newpc_intr, write"
1031 : "cdrom_newpc_intr, read");
1032 }
1033 break;
1034 }
1035
1036 if (blen > thislen)
1037 blen = thislen;
1038
1039 xferfunc(drive, NULL, ptr, blen);
1040
1041 thislen -= blen;
1042 len -= blen;
1043
1044 if (blk_fs_request(rq)) {
1045 rq->buffer += blen;
1046 rq->nr_sectors -= (blen >> 9);
1047 rq->current_nr_sectors -= (blen >> 9);
1048 rq->sector += (blen >> 9);
1049
1050 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1051 cdrom_end_request(drive, 1);
1052 } else {
1053 rq->data_len -= blen;
1054
1055 /*
1056 * The request can't be completed until DRQ is cleared.
1057 * So complete the data, but don't complete the request
1058 * using the dummy function for the callback feature
1059 * of blk_end_request_callback().
1060 */
1061 if (rq->bio)
1062 blk_end_request_callback(rq, 0, blen,
1063 cdrom_newpc_intr_dummy_cb);
1064 else
1065 rq->data += blen;
1066 }
1067 if (!write && blk_sense_request(rq))
1068 rq->sense_len += blen;
1069 }
1070
1071 /* pad, if necessary */
1072 if (!blk_fs_request(rq) && len > 0)
1073 ide_pad_transfer(drive, write, len);
1074
1075 if (blk_pc_request(rq)) {
1076 timeout = rq->timeout;
1077 } else {
1078 timeout = ATAPI_WAIT_PC;
1079 if (!blk_fs_request(rq))
1080 expiry = cdrom_timer_expiry;
1081 }
1082
1083 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1084 return ide_started;
1085
1086 end_request:
1087 if (blk_pc_request(rq)) {
1088 unsigned long flags;
1089 unsigned int dlen = rq->data_len;
1090
1091 if (dma)
1092 rq->data_len = 0;
1093
1094 spin_lock_irqsave(&ide_lock, flags);
1095 if (__blk_end_request(rq, 0, dlen))
1096 BUG();
1097 HWGROUP(drive)->rq = NULL;
1098 spin_unlock_irqrestore(&ide_lock, flags);
1099 } else {
1100 if (!uptodate)
1101 rq->cmd_flags |= REQ_FAILED;
1102 cdrom_end_request(drive, uptodate);
1103 }
1104 return ide_stopped;
1105 }
1106
1107 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1108 {
1109 struct cdrom_info *cd = drive->driver_data;
1110 int write = rq_data_dir(rq) == WRITE;
1111 unsigned short sectors_per_frame =
1112 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1113
1114 if (write) {
1115 /* disk has become write protected */
1116 if (get_disk_ro(cd->disk)) {
1117 cdrom_end_request(drive, 0);
1118 return ide_stopped;
1119 }
1120 } else {
1121 /*
1122 * We may be retrying this request after an error. Fix up any
1123 * weirdness which might be present in the request packet.
1124 */
1125 restore_request(rq);
1126 }
1127
1128 /* use DMA, if possible / writes *must* be hardware frame aligned */
1129 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1130 (rq->sector & (sectors_per_frame - 1))) {
1131 if (write) {
1132 cdrom_end_request(drive, 0);
1133 return ide_stopped;
1134 }
1135 cd->dma = 0;
1136 } else
1137 cd->dma = drive->using_dma;
1138
1139 if (write)
1140 cd->devinfo.media_written = 1;
1141
1142 return ide_started;
1143 }
1144
1145 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1146 {
1147 struct request *rq = HWGROUP(drive)->rq;
1148
1149 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1150 }
1151
1152 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1153 {
1154 struct cdrom_info *info = drive->driver_data;
1155
1156 if (blk_pc_request(rq))
1157 rq->cmd_flags |= REQ_QUIET;
1158 else
1159 rq->cmd_flags &= ~REQ_FAILED;
1160
1161 info->dma = 0;
1162
1163 /* sg request */
1164 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1165 struct request_queue *q = drive->queue;
1166 unsigned int alignment;
1167 char *buf;
1168
1169 if (rq->bio)
1170 buf = bio_data(rq->bio);
1171 else
1172 buf = rq->data;
1173
1174 info->dma = drive->using_dma;
1175
1176 /*
1177 * check if dma is safe
1178 *
1179 * NOTE! The "len" and "addr" checks should possibly have
1180 * separate masks.
1181 */
1182 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1183 if ((unsigned long)buf & alignment || rq->data_len & alignment
1184 || object_is_on_stack(buf))
1185 info->dma = 0;
1186 }
1187 }
1188
1189 /*
1190 * cdrom driver request routine.
1191 */
1192 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1193 sector_t block)
1194 {
1195 struct cdrom_info *info = drive->driver_data;
1196 ide_handler_t *fn;
1197 int xferlen;
1198
1199 if (blk_fs_request(rq)) {
1200 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1201 ide_hwif_t *hwif = drive->hwif;
1202 unsigned long elapsed = jiffies - info->start_seek;
1203 int stat = hwif->tp_ops->read_status(hwif);
1204
1205 if ((stat & ATA_DSC) != ATA_DSC) {
1206 if (elapsed < IDECD_SEEK_TIMEOUT) {
1207 ide_stall_queue(drive,
1208 IDECD_SEEK_TIMER);
1209 return ide_stopped;
1210 }
1211 printk(KERN_ERR "%s: DSC timeout\n",
1212 drive->name);
1213 }
1214 drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1215 }
1216 if (rq_data_dir(rq) == READ &&
1217 IDE_LARGE_SEEK(info->last_block, block,
1218 IDECD_SEEK_THRESHOLD) &&
1219 drive->dsc_overlap) {
1220 xferlen = 0;
1221 fn = cdrom_start_seek_continuation;
1222
1223 info->dma = 0;
1224 info->start_seek = jiffies;
1225
1226 ide_cd_prepare_seek_request(drive, rq);
1227 } else {
1228 xferlen = 32768;
1229 fn = cdrom_start_rw_cont;
1230
1231 if (cdrom_start_rw(drive, rq) == ide_stopped)
1232 return ide_stopped;
1233
1234 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1235 return ide_stopped;
1236 }
1237 info->last_block = block;
1238 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1239 rq->cmd_type == REQ_TYPE_ATA_PC) {
1240 xferlen = rq->data_len;
1241 fn = cdrom_do_newpc_cont;
1242
1243 if (!rq->timeout)
1244 rq->timeout = ATAPI_WAIT_PC;
1245
1246 cdrom_do_block_pc(drive, rq);
1247 } else if (blk_special_request(rq)) {
1248 /* right now this can only be a reset... */
1249 cdrom_end_request(drive, 1);
1250 return ide_stopped;
1251 } else {
1252 blk_dump_rq_flags(rq, "ide-cd bad flags");
1253 cdrom_end_request(drive, 0);
1254 return ide_stopped;
1255 }
1256
1257 return cdrom_start_packet_command(drive, xferlen, fn);
1258 }
1259
1260 /*
1261 * Ioctl handling.
1262 *
1263 * Routines which queue packet commands take as a final argument a pointer to a
1264 * request_sense struct. If execution of the command results in an error with a
1265 * CHECK CONDITION status, this structure will be filled with the results of the
1266 * subsequent request sense command. The pointer can also be NULL, in which case
1267 * no sense information is returned.
1268 */
1269 static void msf_from_bcd(struct atapi_msf *msf)
1270 {
1271 msf->minute = bcd2bin(msf->minute);
1272 msf->second = bcd2bin(msf->second);
1273 msf->frame = bcd2bin(msf->frame);
1274 }
1275
1276 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1277 {
1278 struct cdrom_info *info = drive->driver_data;
1279 struct cdrom_device_info *cdi = &info->devinfo;
1280 unsigned char cmd[BLK_MAX_CDB];
1281
1282 memset(cmd, 0, BLK_MAX_CDB);
1283 cmd[0] = GPCMD_TEST_UNIT_READY;
1284
1285 /*
1286 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1287 * instead of supporting the LOAD_UNLOAD opcode.
1288 */
1289 cmd[7] = cdi->sanyo_slot % 3;
1290
1291 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1292 }
1293
1294 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1295 unsigned long *sectors_per_frame,
1296 struct request_sense *sense)
1297 {
1298 struct {
1299 __be32 lba;
1300 __be32 blocklen;
1301 } capbuf;
1302
1303 int stat;
1304 unsigned char cmd[BLK_MAX_CDB];
1305 unsigned len = sizeof(capbuf);
1306 u32 blocklen;
1307
1308 memset(cmd, 0, BLK_MAX_CDB);
1309 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1310
1311 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1312 REQ_QUIET);
1313 if (stat)
1314 return stat;
1315
1316 /*
1317 * Sanity check the given block size
1318 */
1319 blocklen = be32_to_cpu(capbuf.blocklen);
1320 switch (blocklen) {
1321 case 512:
1322 case 1024:
1323 case 2048:
1324 case 4096:
1325 break;
1326 default:
1327 printk(KERN_ERR "%s: weird block size %u\n",
1328 drive->name, blocklen);
1329 printk(KERN_ERR "%s: default to 2kb block size\n",
1330 drive->name);
1331 blocklen = 2048;
1332 break;
1333 }
1334
1335 *capacity = 1 + be32_to_cpu(capbuf.lba);
1336 *sectors_per_frame = blocklen >> SECTOR_BITS;
1337 return 0;
1338 }
1339
1340 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1341 int format, char *buf, int buflen,
1342 struct request_sense *sense)
1343 {
1344 unsigned char cmd[BLK_MAX_CDB];
1345
1346 memset(cmd, 0, BLK_MAX_CDB);
1347
1348 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1349 cmd[6] = trackno;
1350 cmd[7] = (buflen >> 8);
1351 cmd[8] = (buflen & 0xff);
1352 cmd[9] = (format << 6);
1353
1354 if (msf_flag)
1355 cmd[1] = 2;
1356
1357 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1358 }
1359
1360 /* Try to read the entire TOC for the disk into our internal buffer. */
1361 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1362 {
1363 int stat, ntracks, i;
1364 struct cdrom_info *info = drive->driver_data;
1365 struct cdrom_device_info *cdi = &info->devinfo;
1366 struct atapi_toc *toc = info->toc;
1367 struct {
1368 struct atapi_toc_header hdr;
1369 struct atapi_toc_entry ent;
1370 } ms_tmp;
1371 long last_written;
1372 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1373
1374 if (toc == NULL) {
1375 /* try to allocate space */
1376 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1377 if (toc == NULL) {
1378 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1379 drive->name);
1380 return -ENOMEM;
1381 }
1382 info->toc = toc;
1383 }
1384
1385 /*
1386 * Check to see if the existing data is still valid. If it is,
1387 * just return.
1388 */
1389 (void) cdrom_check_status(drive, sense);
1390
1391 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1392 return 0;
1393
1394 /* try to get the total cdrom capacity and sector size */
1395 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1396 sense);
1397 if (stat)
1398 toc->capacity = 0x1fffff;
1399
1400 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1401 /* save a private copy of the TOC capacity for error handling */
1402 drive->probed_capacity = toc->capacity * sectors_per_frame;
1403
1404 blk_queue_hardsect_size(drive->queue,
1405 sectors_per_frame << SECTOR_BITS);
1406
1407 /* first read just the header, so we know how long the TOC is */
1408 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1409 sizeof(struct atapi_toc_header), sense);
1410 if (stat)
1411 return stat;
1412
1413 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1414 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1415 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1416 }
1417
1418 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1419 if (ntracks <= 0)
1420 return -EIO;
1421 if (ntracks > MAX_TRACKS)
1422 ntracks = MAX_TRACKS;
1423
1424 /* now read the whole schmeer */
1425 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1426 (char *)&toc->hdr,
1427 sizeof(struct atapi_toc_header) +
1428 (ntracks + 1) *
1429 sizeof(struct atapi_toc_entry), sense);
1430
1431 if (stat && toc->hdr.first_track > 1) {
1432 /*
1433 * Cds with CDI tracks only don't have any TOC entries, despite
1434 * of this the returned values are
1435 * first_track == last_track = number of CDI tracks + 1,
1436 * so that this case is indistinguishable from the same layout
1437 * plus an additional audio track. If we get an error for the
1438 * regular case, we assume a CDI without additional audio
1439 * tracks. In this case the readable TOC is empty (CDI tracks
1440 * are not included) and only holds the Leadout entry.
1441 *
1442 * Heiko Eißfeldt.
1443 */
1444 ntracks = 0;
1445 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1446 (char *)&toc->hdr,
1447 sizeof(struct atapi_toc_header) +
1448 (ntracks + 1) *
1449 sizeof(struct atapi_toc_entry),
1450 sense);
1451 if (stat)
1452 return stat;
1453
1454 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1455 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1456 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1457 } else {
1458 toc->hdr.first_track = CDROM_LEADOUT;
1459 toc->hdr.last_track = CDROM_LEADOUT;
1460 }
1461 }
1462
1463 if (stat)
1464 return stat;
1465
1466 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1467
1468 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1469 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1470 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1471 }
1472
1473 for (i = 0; i <= ntracks; i++) {
1474 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1475 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1476 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1477 msf_from_bcd(&toc->ent[i].addr.msf);
1478 }
1479 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1480 toc->ent[i].addr.msf.second,
1481 toc->ent[i].addr.msf.frame);
1482 }
1483
1484 if (toc->hdr.first_track != CDROM_LEADOUT) {
1485 /* read the multisession information */
1486 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1487 sizeof(ms_tmp), sense);
1488 if (stat)
1489 return stat;
1490
1491 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1492 } else {
1493 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1494 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1495 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1496 }
1497
1498 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1499 /* re-read multisession information using MSF format */
1500 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1501 sizeof(ms_tmp), sense);
1502 if (stat)
1503 return stat;
1504
1505 msf_from_bcd(&ms_tmp.ent.addr.msf);
1506 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1507 ms_tmp.ent.addr.msf.second,
1508 ms_tmp.ent.addr.msf.frame);
1509 }
1510
1511 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1512
1513 /* now try to get the total cdrom capacity */
1514 stat = cdrom_get_last_written(cdi, &last_written);
1515 if (!stat && (last_written > toc->capacity)) {
1516 toc->capacity = last_written;
1517 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1518 drive->probed_capacity = toc->capacity * sectors_per_frame;
1519 }
1520
1521 /* Remember that we've read this stuff. */
1522 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1523
1524 return 0;
1525 }
1526
1527 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1528 {
1529 struct cdrom_info *info = drive->driver_data;
1530 struct cdrom_device_info *cdi = &info->devinfo;
1531 struct packet_command cgc;
1532 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1533
1534 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1535 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1536
1537 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1538 do {
1539 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1540 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1541 if (!stat)
1542 break;
1543 } while (--attempts);
1544 return stat;
1545 }
1546
1547 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1548 {
1549 struct cdrom_info *cd = drive->driver_data;
1550 u16 curspeed, maxspeed;
1551
1552 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1553 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1554 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1555 } else {
1556 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1557 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1558 }
1559
1560 cd->current_speed = (curspeed + (176/2)) / 176;
1561 cd->max_speed = (maxspeed + (176/2)) / 176;
1562 }
1563
1564 #define IDE_CD_CAPABILITIES \
1565 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1566 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1567 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1568 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1569 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1570
1571 static struct cdrom_device_ops ide_cdrom_dops = {
1572 .open = ide_cdrom_open_real,
1573 .release = ide_cdrom_release_real,
1574 .drive_status = ide_cdrom_drive_status,
1575 .media_changed = ide_cdrom_check_media_change_real,
1576 .tray_move = ide_cdrom_tray_move,
1577 .lock_door = ide_cdrom_lock_door,
1578 .select_speed = ide_cdrom_select_speed,
1579 .get_last_session = ide_cdrom_get_last_session,
1580 .get_mcn = ide_cdrom_get_mcn,
1581 .reset = ide_cdrom_reset,
1582 .audio_ioctl = ide_cdrom_audio_ioctl,
1583 .capability = IDE_CD_CAPABILITIES,
1584 .generic_packet = ide_cdrom_packet,
1585 };
1586
1587 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1588 {
1589 struct cdrom_info *info = drive->driver_data;
1590 struct cdrom_device_info *devinfo = &info->devinfo;
1591
1592 devinfo->ops = &ide_cdrom_dops;
1593 devinfo->speed = info->current_speed;
1594 devinfo->capacity = nslots;
1595 devinfo->handle = drive;
1596 strcpy(devinfo->name, drive->name);
1597
1598 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1599 devinfo->mask |= CDC_SELECT_SPEED;
1600
1601 devinfo->disk = info->disk;
1602 return register_cdrom(devinfo);
1603 }
1604
1605 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1606 {
1607 struct cdrom_info *cd = drive->driver_data;
1608 struct cdrom_device_info *cdi = &cd->devinfo;
1609 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1610 mechtype_t mechtype;
1611 int nslots = 1;
1612
1613 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1614 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1615 CDC_MO_DRIVE | CDC_RAM);
1616
1617 if (drive->media == ide_optical) {
1618 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1619 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1620 drive->name);
1621 return nslots;
1622 }
1623
1624 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1625 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1626 cdi->mask &= ~CDC_PLAY_AUDIO;
1627 return nslots;
1628 }
1629
1630 /*
1631 * We have to cheat a little here. the packet will eventually be queued
1632 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1633 * Since this device hasn't been registered with the Uniform layer yet,
1634 * it can't do this. Same goes for cdi->ops.
1635 */
1636 cdi->handle = drive;
1637 cdi->ops = &ide_cdrom_dops;
1638
1639 if (ide_cdrom_get_capabilities(drive, buf))
1640 return 0;
1641
1642 if ((buf[8 + 6] & 0x01) == 0)
1643 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1644 if (buf[8 + 6] & 0x08)
1645 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1646 if (buf[8 + 3] & 0x01)
1647 cdi->mask &= ~CDC_CD_R;
1648 if (buf[8 + 3] & 0x02)
1649 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1650 if (buf[8 + 2] & 0x38)
1651 cdi->mask &= ~CDC_DVD;
1652 if (buf[8 + 3] & 0x20)
1653 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1654 if (buf[8 + 3] & 0x10)
1655 cdi->mask &= ~CDC_DVD_R;
1656 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1657 cdi->mask &= ~CDC_PLAY_AUDIO;
1658
1659 mechtype = buf[8 + 6] >> 5;
1660 if (mechtype == mechtype_caddy ||
1661 mechtype == mechtype_popup ||
1662 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1663 cdi->mask |= CDC_CLOSE_TRAY;
1664
1665 if (cdi->sanyo_slot > 0) {
1666 cdi->mask &= ~CDC_SELECT_DISC;
1667 nslots = 3;
1668 } else if (mechtype == mechtype_individual_changer ||
1669 mechtype == mechtype_cartridge_changer) {
1670 nslots = cdrom_number_of_slots(cdi);
1671 if (nslots > 1)
1672 cdi->mask &= ~CDC_SELECT_DISC;
1673 }
1674
1675 ide_cdrom_update_speed(drive, buf);
1676
1677 printk(KERN_INFO "%s: ATAPI", drive->name);
1678
1679 /* don't print speed if the drive reported 0 */
1680 if (cd->max_speed)
1681 printk(KERN_CONT " %dX", cd->max_speed);
1682
1683 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1684
1685 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1686 printk(KERN_CONT " DVD%s%s",
1687 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1688 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1689
1690 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1691 printk(KERN_CONT " CD%s%s",
1692 (cdi->mask & CDC_CD_R) ? "" : "-R",
1693 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1694
1695 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1696 printk(KERN_CONT " changer w/%d slots", nslots);
1697 else
1698 printk(KERN_CONT " drive");
1699
1700 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12]));
1701
1702 return nslots;
1703 }
1704
1705 /* standard prep_rq_fn that builds 10 byte cmds */
1706 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1707 {
1708 int hard_sect = queue_hardsect_size(q);
1709 long block = (long)rq->hard_sector / (hard_sect >> 9);
1710 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1711
1712 memset(rq->cmd, 0, BLK_MAX_CDB);
1713
1714 if (rq_data_dir(rq) == READ)
1715 rq->cmd[0] = GPCMD_READ_10;
1716 else
1717 rq->cmd[0] = GPCMD_WRITE_10;
1718
1719 /*
1720 * fill in lba
1721 */
1722 rq->cmd[2] = (block >> 24) & 0xff;
1723 rq->cmd[3] = (block >> 16) & 0xff;
1724 rq->cmd[4] = (block >> 8) & 0xff;
1725 rq->cmd[5] = block & 0xff;
1726
1727 /*
1728 * and transfer length
1729 */
1730 rq->cmd[7] = (blocks >> 8) & 0xff;
1731 rq->cmd[8] = blocks & 0xff;
1732 rq->cmd_len = 10;
1733 return BLKPREP_OK;
1734 }
1735
1736 /*
1737 * Most of the SCSI commands are supported directly by ATAPI devices.
1738 * This transform handles the few exceptions.
1739 */
1740 static int ide_cdrom_prep_pc(struct request *rq)
1741 {
1742 u8 *c = rq->cmd;
1743
1744 /* transform 6-byte read/write commands to the 10-byte version */
1745 if (c[0] == READ_6 || c[0] == WRITE_6) {
1746 c[8] = c[4];
1747 c[5] = c[3];
1748 c[4] = c[2];
1749 c[3] = c[1] & 0x1f;
1750 c[2] = 0;
1751 c[1] &= 0xe0;
1752 c[0] += (READ_10 - READ_6);
1753 rq->cmd_len = 10;
1754 return BLKPREP_OK;
1755 }
1756
1757 /*
1758 * it's silly to pretend we understand 6-byte sense commands, just
1759 * reject with ILLEGAL_REQUEST and the caller should take the
1760 * appropriate action
1761 */
1762 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1763 rq->errors = ILLEGAL_REQUEST;
1764 return BLKPREP_KILL;
1765 }
1766
1767 return BLKPREP_OK;
1768 }
1769
1770 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1771 {
1772 if (blk_fs_request(rq))
1773 return ide_cdrom_prep_fs(q, rq);
1774 else if (blk_pc_request(rq))
1775 return ide_cdrom_prep_pc(rq);
1776
1777 return 0;
1778 }
1779
1780 struct cd_list_entry {
1781 const char *id_model;
1782 const char *id_firmware;
1783 unsigned int cd_flags;
1784 };
1785
1786 #ifdef CONFIG_IDE_PROC_FS
1787 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1788 {
1789 unsigned long capacity, sectors_per_frame;
1790
1791 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1792 return 0;
1793
1794 return capacity * sectors_per_frame;
1795 }
1796
1797 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1798 int count, int *eof, void *data)
1799 {
1800 ide_drive_t *drive = data;
1801 int len;
1802
1803 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1804 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1805 }
1806
1807 static ide_proc_entry_t idecd_proc[] = {
1808 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1809 { NULL, 0, NULL, NULL }
1810 };
1811
1812 ide_devset_rw_field(dsc_overlap, dsc_overlap);
1813
1814 static const struct ide_proc_devset idecd_settings[] = {
1815 IDE_PROC_DEVSET(dsc_overlap, 0, 1),
1816 { 0 },
1817 };
1818 #endif
1819
1820 static const struct cd_list_entry ide_cd_quirks_list[] = {
1821 /* Limit transfer size per interrupt. */
1822 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1823 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1824 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1825 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1826 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1827 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1828 IDE_AFLAG_PRE_ATAPI12, },
1829 /* Vertos 300, some versions of this drive like to talk BCD. */
1830 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1831 /* Vertos 600 ESD. */
1832 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1833 /*
1834 * Sanyo 3 CD changer uses a non-standard command for CD changing
1835 * (by default standard ATAPI support for CD changers is used).
1836 */
1837 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1838 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1839 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1840 /* Stingray 8X CD-ROM. */
1841 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1842 /*
1843 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1844 * mode sense page capabilities size, but older drives break.
1845 */
1846 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1847 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1848 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1849 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1850 /*
1851 * Some drives used by Apple don't advertise audio play
1852 * but they do support reading TOC & audio datas.
1853 */
1854 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1855 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1856 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1857 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1858 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1859 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1860 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1861 { NULL, NULL, 0 }
1862 };
1863
1864 static unsigned int ide_cd_flags(u16 *id)
1865 {
1866 const struct cd_list_entry *cle = ide_cd_quirks_list;
1867
1868 while (cle->id_model) {
1869 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1870 (cle->id_firmware == NULL ||
1871 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1872 return cle->cd_flags;
1873 cle++;
1874 }
1875
1876 return 0;
1877 }
1878
1879 static int ide_cdrom_setup(ide_drive_t *drive)
1880 {
1881 struct cdrom_info *cd = drive->driver_data;
1882 struct cdrom_device_info *cdi = &cd->devinfo;
1883 u16 *id = drive->id;
1884 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1885 int nslots;
1886
1887 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1888 blk_queue_dma_alignment(drive->queue, 31);
1889 blk_queue_update_dma_pad(drive->queue, 15);
1890 drive->queue->unplug_delay = (1 * HZ) / 1000;
1891 if (!drive->queue->unplug_delay)
1892 drive->queue->unplug_delay = 1;
1893
1894 drive->special.all = 0;
1895
1896 drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1897 ide_cd_flags(id);
1898
1899 if ((id[ATA_ID_CONFIG] & 0x0060) == 0x20)
1900 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1901
1902 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1903 fw_rev[4] == '1' && fw_rev[6] <= '2')
1904 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1905 IDE_AFLAG_TOCADDR_AS_BCD);
1906 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1907 fw_rev[4] == '1' && fw_rev[6] <= '2')
1908 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1909 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1910 /* 3 => use CD in slot 0 */
1911 cdi->sanyo_slot = 3;
1912
1913 nslots = ide_cdrom_probe_capabilities(drive);
1914
1915 /* set correct block size */
1916 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1917
1918 drive->dsc_overlap = (drive->next != drive);
1919
1920 if (ide_cdrom_register(drive, nslots)) {
1921 printk(KERN_ERR "%s: %s failed to register device with the"
1922 " cdrom driver.\n", drive->name, __func__);
1923 cd->devinfo.handle = NULL;
1924 return 1;
1925 }
1926
1927 ide_proc_register_driver(drive, cd->driver);
1928 return 0;
1929 }
1930
1931 static void ide_cd_remove(ide_drive_t *drive)
1932 {
1933 struct cdrom_info *info = drive->driver_data;
1934
1935 ide_proc_unregister_driver(drive, info->driver);
1936
1937 del_gendisk(info->disk);
1938
1939 ide_cd_put(info);
1940 }
1941
1942 static void ide_cd_release(struct kref *kref)
1943 {
1944 struct cdrom_info *info = to_ide_cd(kref);
1945 struct cdrom_device_info *devinfo = &info->devinfo;
1946 ide_drive_t *drive = info->drive;
1947 struct gendisk *g = info->disk;
1948
1949 kfree(info->toc);
1950 if (devinfo->handle == drive)
1951 unregister_cdrom(devinfo);
1952 drive->dsc_overlap = 0;
1953 drive->driver_data = NULL;
1954 blk_queue_prep_rq(drive->queue, NULL);
1955 g->private_data = NULL;
1956 put_disk(g);
1957 kfree(info);
1958 }
1959
1960 static int ide_cd_probe(ide_drive_t *);
1961
1962 static ide_driver_t ide_cdrom_driver = {
1963 .gen_driver = {
1964 .owner = THIS_MODULE,
1965 .name = "ide-cdrom",
1966 .bus = &ide_bus_type,
1967 },
1968 .probe = ide_cd_probe,
1969 .remove = ide_cd_remove,
1970 .version = IDECD_VERSION,
1971 .media = ide_cdrom,
1972 .do_request = ide_cd_do_request,
1973 .end_request = ide_end_request,
1974 .error = __ide_error,
1975 #ifdef CONFIG_IDE_PROC_FS
1976 .proc = idecd_proc,
1977 .settings = idecd_settings,
1978 #endif
1979 };
1980
1981 static int idecd_open(struct inode *inode, struct file *file)
1982 {
1983 struct gendisk *disk = inode->i_bdev->bd_disk;
1984 struct cdrom_info *info;
1985 int rc = -ENOMEM;
1986
1987 info = ide_cd_get(disk);
1988 if (!info)
1989 return -ENXIO;
1990
1991 rc = cdrom_open(&info->devinfo, inode, file);
1992
1993 if (rc < 0)
1994 ide_cd_put(info);
1995
1996 return rc;
1997 }
1998
1999 static int idecd_release(struct inode *inode, struct file *file)
2000 {
2001 struct gendisk *disk = inode->i_bdev->bd_disk;
2002 struct cdrom_info *info = ide_cd_g(disk);
2003
2004 cdrom_release(&info->devinfo, file);
2005
2006 ide_cd_put(info);
2007
2008 return 0;
2009 }
2010
2011 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2012 {
2013 struct packet_command cgc;
2014 char buffer[16];
2015 int stat;
2016 char spindown;
2017
2018 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2019 return -EFAULT;
2020
2021 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2022
2023 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2024 if (stat)
2025 return stat;
2026
2027 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2028 return cdrom_mode_select(cdi, &cgc);
2029 }
2030
2031 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2032 {
2033 struct packet_command cgc;
2034 char buffer[16];
2035 int stat;
2036 char spindown;
2037
2038 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2039
2040 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2041 if (stat)
2042 return stat;
2043
2044 spindown = buffer[11] & 0x0f;
2045 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2046 return -EFAULT;
2047 return 0;
2048 }
2049
2050 static int idecd_ioctl(struct inode *inode, struct file *file,
2051 unsigned int cmd, unsigned long arg)
2052 {
2053 struct block_device *bdev = inode->i_bdev;
2054 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2055 int err;
2056
2057 switch (cmd) {
2058 case CDROMSETSPINDOWN:
2059 return idecd_set_spindown(&info->devinfo, arg);
2060 case CDROMGETSPINDOWN:
2061 return idecd_get_spindown(&info->devinfo, arg);
2062 default:
2063 break;
2064 }
2065
2066 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2067 if (err == -EINVAL)
2068 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2069
2070 return err;
2071 }
2072
2073 static int idecd_media_changed(struct gendisk *disk)
2074 {
2075 struct cdrom_info *info = ide_cd_g(disk);
2076 return cdrom_media_changed(&info->devinfo);
2077 }
2078
2079 static int idecd_revalidate_disk(struct gendisk *disk)
2080 {
2081 struct cdrom_info *info = ide_cd_g(disk);
2082 struct request_sense sense;
2083
2084 ide_cd_read_toc(info->drive, &sense);
2085
2086 return 0;
2087 }
2088
2089 static struct block_device_operations idecd_ops = {
2090 .owner = THIS_MODULE,
2091 .open = idecd_open,
2092 .release = idecd_release,
2093 .ioctl = idecd_ioctl,
2094 .media_changed = idecd_media_changed,
2095 .revalidate_disk = idecd_revalidate_disk
2096 };
2097
2098 /* module options */
2099 static char *ignore;
2100
2101 module_param(ignore, charp, 0400);
2102 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2103
2104 static int ide_cd_probe(ide_drive_t *drive)
2105 {
2106 struct cdrom_info *info;
2107 struct gendisk *g;
2108 struct request_sense sense;
2109
2110 if (!strstr("ide-cdrom", drive->driver_req))
2111 goto failed;
2112
2113 if (drive->media != ide_cdrom && drive->media != ide_optical)
2114 goto failed;
2115
2116 /* skip drives that we were told to ignore */
2117 if (ignore != NULL) {
2118 if (strstr(ignore, drive->name)) {
2119 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2120 drive->name);
2121 goto failed;
2122 }
2123 }
2124 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2125 if (info == NULL) {
2126 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2127 drive->name);
2128 goto failed;
2129 }
2130
2131 g = alloc_disk(1 << PARTN_BITS);
2132 if (!g)
2133 goto out_free_cd;
2134
2135 ide_init_disk(g, drive);
2136
2137 kref_init(&info->kref);
2138
2139 info->drive = drive;
2140 info->driver = &ide_cdrom_driver;
2141 info->disk = g;
2142
2143 g->private_data = &info->driver;
2144
2145 drive->driver_data = info;
2146
2147 g->minors = 1;
2148 g->driverfs_dev = &drive->gendev;
2149 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2150 if (ide_cdrom_setup(drive)) {
2151 ide_cd_release(&info->kref);
2152 goto failed;
2153 }
2154
2155 ide_cd_read_toc(drive, &sense);
2156 g->fops = &idecd_ops;
2157 g->flags |= GENHD_FL_REMOVABLE;
2158 add_disk(g);
2159 return 0;
2160
2161 out_free_cd:
2162 kfree(info);
2163 failed:
2164 return -ENODEV;
2165 }
2166
2167 static void __exit ide_cdrom_exit(void)
2168 {
2169 driver_unregister(&ide_cdrom_driver.gen_driver);
2170 }
2171
2172 static int __init ide_cdrom_init(void)
2173 {
2174 return driver_register(&ide_cdrom_driver.gen_driver);
2175 }
2176
2177 MODULE_ALIAS("ide:*m-cdrom*");
2178 MODULE_ALIAS("ide-cd");
2179 module_init(ide_cdrom_init);
2180 module_exit(ide_cdrom_exit);
2181 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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