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ide: add device flags
[mirror_ubuntu-artful-kernel.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 static void ide_cd_release(struct kref *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 kref_get(&cd->kref);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 kref_put(&cd->kref, ide_cd_release);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
101 return 0;
102
103 switch (sense->sense_key) {
104 case NO_SENSE:
105 case RECOVERED_ERROR:
106 break;
107 case NOT_READY:
108 /*
109 * don't care about tray state messages for e.g. capacity
110 * commands or in-progress or becoming ready
111 */
112 if (sense->asc == 0x3a || sense->asc == 0x04)
113 break;
114 log = 1;
115 break;
116 case ILLEGAL_REQUEST:
117 /*
118 * don't log START_STOP unit with LoEj set, since we cannot
119 * reliably check if drive can auto-close
120 */
121 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
122 break;
123 log = 1;
124 break;
125 case UNIT_ATTENTION:
126 /*
127 * Make good and sure we've seen this potential media change.
128 * Some drives (i.e. Creative) fail to present the correct sense
129 * key in the error register.
130 */
131 cdrom_saw_media_change(drive);
132 break;
133 default:
134 log = 1;
135 break;
136 }
137 return log;
138 }
139
140 static void cdrom_analyze_sense_data(ide_drive_t *drive,
141 struct request *failed_command,
142 struct request_sense *sense)
143 {
144 unsigned long sector;
145 unsigned long bio_sectors;
146 struct cdrom_info *info = drive->driver_data;
147
148 if (!cdrom_log_sense(drive, failed_command, sense))
149 return;
150
151 /*
152 * If a read toc is executed for a CD-R or CD-RW medium where the first
153 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
154 * confusing error)
155 */
156 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
157 if (sense->sense_key == 0x05 && sense->asc == 0x24)
158 return;
159
160 /* current error */
161 if (sense->error_code == 0x70) {
162 switch (sense->sense_key) {
163 case MEDIUM_ERROR:
164 case VOLUME_OVERFLOW:
165 case ILLEGAL_REQUEST:
166 if (!sense->valid)
167 break;
168 if (failed_command == NULL ||
169 !blk_fs_request(failed_command))
170 break;
171 sector = (sense->information[0] << 24) |
172 (sense->information[1] << 16) |
173 (sense->information[2] << 8) |
174 (sense->information[3]);
175
176 if (drive->queue->hardsect_size == 2048)
177 /* device sector size is 2K */
178 sector <<= 2;
179
180 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
181 sector &= ~(bio_sectors - 1);
182
183 if (sector < get_capacity(info->disk) &&
184 drive->probed_capacity - sector < 4 * 75)
185 set_capacity(info->disk, sector);
186 }
187 }
188
189 ide_cd_log_error(drive->name, failed_command, sense);
190 }
191
192 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
193 struct request *failed_command)
194 {
195 struct cdrom_info *info = drive->driver_data;
196 struct request *rq = &info->request_sense_request;
197
198 if (sense == NULL)
199 sense = &info->sense_data;
200
201 /* stuff the sense request in front of our current request */
202 blk_rq_init(NULL, rq);
203 rq->cmd_type = REQ_TYPE_ATA_PC;
204 rq->rq_disk = info->disk;
205
206 rq->data = sense;
207 rq->cmd[0] = GPCMD_REQUEST_SENSE;
208 rq->cmd[4] = 18;
209 rq->data_len = 18;
210
211 rq->cmd_type = REQ_TYPE_SENSE;
212 rq->cmd_flags |= REQ_PREEMPT;
213
214 /* NOTE! Save the failed command in "rq->buffer" */
215 rq->buffer = (void *) failed_command;
216
217 ide_do_drive_cmd(drive, rq);
218 }
219
220 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
221 {
222 struct request *rq = HWGROUP(drive)->rq;
223 int nsectors = rq->hard_cur_sectors;
224
225 if (blk_sense_request(rq) && uptodate) {
226 /*
227 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
228 * failed request
229 */
230 struct request *failed = (struct request *) rq->buffer;
231 struct cdrom_info *info = drive->driver_data;
232 void *sense = &info->sense_data;
233 unsigned long flags;
234
235 if (failed) {
236 if (failed->sense) {
237 sense = failed->sense;
238 failed->sense_len = rq->sense_len;
239 }
240 cdrom_analyze_sense_data(drive, failed, sense);
241 /*
242 * now end the failed request
243 */
244 if (blk_fs_request(failed)) {
245 if (ide_end_dequeued_request(drive, failed, 0,
246 failed->hard_nr_sectors))
247 BUG();
248 } else {
249 spin_lock_irqsave(&ide_lock, flags);
250 if (__blk_end_request(failed, -EIO,
251 failed->data_len))
252 BUG();
253 spin_unlock_irqrestore(&ide_lock, flags);
254 }
255 } else
256 cdrom_analyze_sense_data(drive, NULL, sense);
257 }
258
259 if (!rq->current_nr_sectors && blk_fs_request(rq))
260 uptodate = 1;
261 /* make sure it's fully ended */
262 if (blk_pc_request(rq))
263 nsectors = (rq->data_len + 511) >> 9;
264 if (!nsectors)
265 nsectors = 1;
266
267 ide_end_request(drive, uptodate, nsectors);
268 }
269
270 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
271 {
272 if (st & 0x80)
273 return;
274 ide_dump_status(drive, msg, st);
275 }
276
277 /*
278 * Returns:
279 * 0: if the request should be continued.
280 * 1: if the request was ended.
281 */
282 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
283 {
284 ide_hwif_t *hwif = drive->hwif;
285 struct request *rq = hwif->hwgroup->rq;
286 int stat, err, sense_key;
287
288 /* check for errors */
289 stat = hwif->tp_ops->read_status(hwif);
290
291 if (stat_ret)
292 *stat_ret = stat;
293
294 if (OK_STAT(stat, good_stat, BAD_R_STAT))
295 return 0;
296
297 /* get the IDE error register */
298 err = ide_read_error(drive);
299 sense_key = err >> 4;
300
301 if (rq == NULL) {
302 printk(KERN_ERR "%s: missing rq in %s\n",
303 drive->name, __func__);
304 return 1;
305 }
306
307 if (blk_sense_request(rq)) {
308 /*
309 * We got an error trying to get sense info from the drive
310 * (probably while trying to recover from a former error).
311 * Just give up.
312 */
313 rq->cmd_flags |= REQ_FAILED;
314 cdrom_end_request(drive, 0);
315 ide_error(drive, "request sense failure", stat);
316 return 1;
317
318 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
319 /* All other functions, except for READ. */
320
321 /*
322 * if we have an error, pass back CHECK_CONDITION as the
323 * scsi status byte
324 */
325 if (blk_pc_request(rq) && !rq->errors)
326 rq->errors = SAM_STAT_CHECK_CONDITION;
327
328 /* check for tray open */
329 if (sense_key == NOT_READY) {
330 cdrom_saw_media_change(drive);
331 } else if (sense_key == UNIT_ATTENTION) {
332 /* check for media change */
333 cdrom_saw_media_change(drive);
334 return 0;
335 } else if (sense_key == ILLEGAL_REQUEST &&
336 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
337 /*
338 * Don't print error message for this condition--
339 * SFF8090i indicates that 5/24/00 is the correct
340 * response to a request to close the tray if the
341 * drive doesn't have that capability.
342 * cdrom_log_sense() knows this!
343 */
344 } else if (!(rq->cmd_flags & REQ_QUIET)) {
345 /* otherwise, print an error */
346 ide_dump_status(drive, "packet command error", stat);
347 }
348
349 rq->cmd_flags |= REQ_FAILED;
350
351 /*
352 * instead of playing games with moving completions around,
353 * remove failed request completely and end it when the
354 * request sense has completed
355 */
356 goto end_request;
357
358 } else if (blk_fs_request(rq)) {
359 int do_end_request = 0;
360
361 /* handle errors from READ and WRITE requests */
362
363 if (blk_noretry_request(rq))
364 do_end_request = 1;
365
366 if (sense_key == NOT_READY) {
367 /* tray open */
368 if (rq_data_dir(rq) == READ) {
369 cdrom_saw_media_change(drive);
370
371 /* fail the request */
372 printk(KERN_ERR "%s: tray open\n", drive->name);
373 do_end_request = 1;
374 } else {
375 struct cdrom_info *info = drive->driver_data;
376
377 /*
378 * Allow the drive 5 seconds to recover, some
379 * devices will return this error while flushing
380 * data from cache.
381 */
382 if (!rq->errors)
383 info->write_timeout = jiffies +
384 ATAPI_WAIT_WRITE_BUSY;
385 rq->errors = 1;
386 if (time_after(jiffies, info->write_timeout))
387 do_end_request = 1;
388 else {
389 unsigned long flags;
390
391 /*
392 * take a breather relying on the unplug
393 * timer to kick us again
394 */
395 spin_lock_irqsave(&ide_lock, flags);
396 blk_plug_device(drive->queue);
397 spin_unlock_irqrestore(&ide_lock,
398 flags);
399 return 1;
400 }
401 }
402 } else if (sense_key == UNIT_ATTENTION) {
403 /* media change */
404 cdrom_saw_media_change(drive);
405
406 /*
407 * Arrange to retry the request but be sure to give up
408 * if we've retried too many times.
409 */
410 if (++rq->errors > ERROR_MAX)
411 do_end_request = 1;
412 } else if (sense_key == ILLEGAL_REQUEST ||
413 sense_key == DATA_PROTECT) {
414 /*
415 * No point in retrying after an illegal request or data
416 * protect error.
417 */
418 ide_dump_status_no_sense(drive, "command error", stat);
419 do_end_request = 1;
420 } else if (sense_key == MEDIUM_ERROR) {
421 /*
422 * No point in re-trying a zillion times on a bad
423 * sector. If we got here the error is not correctable.
424 */
425 ide_dump_status_no_sense(drive,
426 "media error (bad sector)",
427 stat);
428 do_end_request = 1;
429 } else if (sense_key == BLANK_CHECK) {
430 /* disk appears blank ?? */
431 ide_dump_status_no_sense(drive, "media error (blank)",
432 stat);
433 do_end_request = 1;
434 } else if ((err & ~ATA_ABORTED) != 0) {
435 /* go to the default handler for other errors */
436 ide_error(drive, "cdrom_decode_status", stat);
437 return 1;
438 } else if ((++rq->errors > ERROR_MAX)) {
439 /* we've racked up too many retries, abort */
440 do_end_request = 1;
441 }
442
443 /*
444 * End a request through request sense analysis when we have
445 * sense data. We need this in order to perform end of media
446 * processing.
447 */
448 if (do_end_request)
449 goto end_request;
450
451 /*
452 * If we got a CHECK_CONDITION status, queue
453 * a request sense command.
454 */
455 if (stat & ATA_ERR)
456 cdrom_queue_request_sense(drive, NULL, NULL);
457 } else {
458 blk_dump_rq_flags(rq, "ide-cd: bad rq");
459 cdrom_end_request(drive, 0);
460 }
461
462 /* retry, or handle the next request */
463 return 1;
464
465 end_request:
466 if (stat & ATA_ERR) {
467 unsigned long flags;
468
469 spin_lock_irqsave(&ide_lock, flags);
470 blkdev_dequeue_request(rq);
471 HWGROUP(drive)->rq = NULL;
472 spin_unlock_irqrestore(&ide_lock, flags);
473
474 cdrom_queue_request_sense(drive, rq->sense, rq);
475 } else
476 cdrom_end_request(drive, 0);
477
478 return 1;
479 }
480
481 static int cdrom_timer_expiry(ide_drive_t *drive)
482 {
483 struct request *rq = HWGROUP(drive)->rq;
484 unsigned long wait = 0;
485
486 /*
487 * Some commands are *slow* and normally take a long time to complete.
488 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
489 * commands/drives support that. Let ide_timer_expiry keep polling us
490 * for these.
491 */
492 switch (rq->cmd[0]) {
493 case GPCMD_BLANK:
494 case GPCMD_FORMAT_UNIT:
495 case GPCMD_RESERVE_RZONE_TRACK:
496 case GPCMD_CLOSE_TRACK:
497 case GPCMD_FLUSH_CACHE:
498 wait = ATAPI_WAIT_PC;
499 break;
500 default:
501 if (!(rq->cmd_flags & REQ_QUIET))
502 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
503 rq->cmd[0]);
504 wait = 0;
505 break;
506 }
507 return wait;
508 }
509
510 /*
511 * Set up the device registers for transferring a packet command on DEV,
512 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
513 * which actually transfers the command to the drive. If this is a
514 * drq_interrupt device, this routine will arrange for HANDLER to be
515 * called when the interrupt from the drive arrives. Otherwise, HANDLER
516 * will be called immediately after the drive is prepared for the transfer.
517 */
518 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
519 int xferlen,
520 ide_handler_t *handler)
521 {
522 struct cdrom_info *info = drive->driver_data;
523 ide_hwif_t *hwif = drive->hwif;
524
525 /* FIXME: for Virtual DMA we must check harder */
526 if (info->dma)
527 info->dma = !hwif->dma_ops->dma_setup(drive);
528
529 /* set up the controller registers */
530 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
531 xferlen, info->dma);
532
533 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
534 /* waiting for CDB interrupt, not DMA yet. */
535 if (info->dma)
536 drive->waiting_for_dma = 0;
537
538 /* packet command */
539 ide_execute_command(drive, ATA_CMD_PACKET, handler,
540 ATAPI_WAIT_PC, cdrom_timer_expiry);
541 return ide_started;
542 } else {
543 ide_execute_pkt_cmd(drive);
544
545 return (*handler) (drive);
546 }
547 }
548
549 /*
550 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
551 * registers must have already been prepared by cdrom_start_packet_command.
552 * HANDLER is the interrupt handler to call when the command completes or
553 * there's data ready.
554 */
555 #define ATAPI_MIN_CDB_BYTES 12
556 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
557 struct request *rq,
558 ide_handler_t *handler)
559 {
560 ide_hwif_t *hwif = drive->hwif;
561 int cmd_len;
562 struct cdrom_info *info = drive->driver_data;
563 ide_startstop_t startstop;
564
565 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
566 /*
567 * Here we should have been called after receiving an interrupt
568 * from the device. DRQ should how be set.
569 */
570
571 /* check for errors */
572 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
573 return ide_stopped;
574
575 /* ok, next interrupt will be DMA interrupt */
576 if (info->dma)
577 drive->waiting_for_dma = 1;
578 } else {
579 /* otherwise, we must wait for DRQ to get set */
580 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
581 ATA_BUSY, WAIT_READY))
582 return startstop;
583 }
584
585 /* arm the interrupt handler */
586 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
587
588 /* ATAPI commands get padded out to 12 bytes minimum */
589 cmd_len = COMMAND_SIZE(rq->cmd[0]);
590 if (cmd_len < ATAPI_MIN_CDB_BYTES)
591 cmd_len = ATAPI_MIN_CDB_BYTES;
592
593 /* send the command to the device */
594 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
595
596 /* start the DMA if need be */
597 if (info->dma)
598 hwif->dma_ops->dma_start(drive);
599
600 return ide_started;
601 }
602
603 /*
604 * Check the contents of the interrupt reason register from the cdrom
605 * and attempt to recover if there are problems. Returns 0 if everything's
606 * ok; nonzero if the request has been terminated.
607 */
608 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
609 int len, int ireason, int rw)
610 {
611 ide_hwif_t *hwif = drive->hwif;
612
613 /*
614 * ireason == 0: the drive wants to receive data from us
615 * ireason == 2: the drive is expecting to transfer data to us
616 */
617 if (ireason == (!rw << 1))
618 return 0;
619 else if (ireason == (rw << 1)) {
620
621 /* whoops... */
622 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
623 drive->name, __func__);
624
625 ide_pad_transfer(drive, rw, len);
626 } else if (rw == 0 && ireason == 1) {
627 /*
628 * Some drives (ASUS) seem to tell us that status info is
629 * available. Just get it and ignore.
630 */
631 (void)hwif->tp_ops->read_status(hwif);
632 return 0;
633 } else {
634 /* drive wants a command packet, or invalid ireason... */
635 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
636 drive->name, __func__, ireason);
637 }
638
639 if (rq->cmd_type == REQ_TYPE_ATA_PC)
640 rq->cmd_flags |= REQ_FAILED;
641
642 cdrom_end_request(drive, 0);
643 return -1;
644 }
645
646 /*
647 * Assume that the drive will always provide data in multiples of at least
648 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
649 */
650 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
651 {
652 if ((len % SECTOR_SIZE) == 0)
653 return 0;
654
655 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
656 drive->name, __func__, len);
657
658 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
659 printk(KERN_ERR " This drive is not supported by "
660 "this version of the driver\n");
661 else {
662 printk(KERN_ERR " Trying to limit transfer sizes\n");
663 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
664 }
665
666 return 1;
667 }
668
669 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
670
671 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
672 struct request *rq)
673 {
674 if (rq_data_dir(rq) == READ) {
675 unsigned short sectors_per_frame =
676 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
677 int nskip = rq->sector & (sectors_per_frame - 1);
678
679 /*
680 * If the requested sector doesn't start on a frame boundary,
681 * we must adjust the start of the transfer so that it does,
682 * and remember to skip the first few sectors.
683 *
684 * If the rq->current_nr_sectors field is larger than the size
685 * of the buffer, it will mean that we're to skip a number of
686 * sectors equal to the amount by which rq->current_nr_sectors
687 * is larger than the buffer size.
688 */
689 if (nskip > 0) {
690 /* sanity check... */
691 if (rq->current_nr_sectors !=
692 bio_cur_sectors(rq->bio)) {
693 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
694 drive->name, __func__,
695 rq->current_nr_sectors);
696 cdrom_end_request(drive, 0);
697 return ide_stopped;
698 }
699 rq->current_nr_sectors += nskip;
700 }
701 }
702 #if 0
703 else
704 /* the immediate bit */
705 rq->cmd[1] = 1 << 3;
706 #endif
707 /* set up the command */
708 rq->timeout = ATAPI_WAIT_PC;
709
710 return ide_started;
711 }
712
713 /*
714 * Routine to send a read/write packet command to the drive. This is usually
715 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
716 * devices, it is called from an interrupt when the drive is ready to accept
717 * the command.
718 */
719 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
720 {
721 struct request *rq = drive->hwif->hwgroup->rq;
722
723 /* send the command to the drive and return */
724 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
725 }
726
727 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
728 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
729 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
730
731 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
732 {
733 struct cdrom_info *info = drive->driver_data;
734 int stat;
735 static int retry = 10;
736
737 if (cdrom_decode_status(drive, 0, &stat))
738 return ide_stopped;
739
740 drive->atapi_flags |= IDE_AFLAG_SEEKING;
741
742 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
743 if (--retry == 0)
744 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
745 }
746 return ide_stopped;
747 }
748
749 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
750 {
751 sector_t frame = rq->sector;
752
753 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
754
755 memset(rq->cmd, 0, BLK_MAX_CDB);
756 rq->cmd[0] = GPCMD_SEEK;
757 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
758
759 rq->timeout = ATAPI_WAIT_PC;
760 }
761
762 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
763 {
764 struct request *rq = drive->hwif->hwgroup->rq;
765
766 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
767 }
768
769 /*
770 * Fix up a possibly partially-processed request so that we can start it over
771 * entirely, or even put it back on the request queue.
772 */
773 static void restore_request(struct request *rq)
774 {
775 if (rq->buffer != bio_data(rq->bio)) {
776 sector_t n =
777 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
778
779 rq->buffer = bio_data(rq->bio);
780 rq->nr_sectors += n;
781 rq->sector -= n;
782 }
783 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
784 rq->hard_cur_sectors = rq->current_nr_sectors;
785 rq->hard_nr_sectors = rq->nr_sectors;
786 rq->hard_sector = rq->sector;
787 rq->q->prep_rq_fn(rq->q, rq);
788 }
789
790 /*
791 * All other packet commands.
792 */
793 static void ide_cd_request_sense_fixup(struct request *rq)
794 {
795 /*
796 * Some of the trailing request sense fields are optional,
797 * and some drives don't send them. Sigh.
798 */
799 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
800 rq->data_len > 0 && rq->data_len <= 5)
801 while (rq->data_len > 0) {
802 *(u8 *)rq->data++ = 0;
803 --rq->data_len;
804 }
805 }
806
807 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
808 int write, void *buffer, unsigned *bufflen,
809 struct request_sense *sense, int timeout,
810 unsigned int cmd_flags)
811 {
812 struct cdrom_info *info = drive->driver_data;
813 struct request_sense local_sense;
814 int retries = 10;
815 unsigned int flags = 0;
816
817 if (!sense)
818 sense = &local_sense;
819
820 /* start of retry loop */
821 do {
822 struct request *rq;
823 int error;
824
825 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
826
827 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
828 rq->cmd_type = REQ_TYPE_ATA_PC;
829 rq->sense = sense;
830 rq->cmd_flags |= cmd_flags;
831 rq->timeout = timeout;
832 if (buffer) {
833 rq->data = buffer;
834 rq->data_len = *bufflen;
835 }
836
837 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
838
839 if (buffer)
840 *bufflen = rq->data_len;
841
842 flags = rq->cmd_flags;
843 blk_put_request(rq);
844
845 /*
846 * FIXME: we should probably abort/retry or something in case of
847 * failure.
848 */
849 if (flags & REQ_FAILED) {
850 /*
851 * The request failed. Retry if it was due to a unit
852 * attention status (usually means media was changed).
853 */
854 struct request_sense *reqbuf = sense;
855
856 if (reqbuf->sense_key == UNIT_ATTENTION)
857 cdrom_saw_media_change(drive);
858 else if (reqbuf->sense_key == NOT_READY &&
859 reqbuf->asc == 4 && reqbuf->ascq != 4) {
860 /*
861 * The drive is in the process of loading
862 * a disk. Retry, but wait a little to give
863 * the drive time to complete the load.
864 */
865 ssleep(2);
866 } else {
867 /* otherwise, don't retry */
868 retries = 0;
869 }
870 --retries;
871 }
872
873 /* end of retry loop */
874 } while ((flags & REQ_FAILED) && retries >= 0);
875
876 /* return an error if the command failed */
877 return (flags & REQ_FAILED) ? -EIO : 0;
878 }
879
880 /*
881 * Called from blk_end_request_callback() after the data of the request is
882 * completed and before the request itself is completed. By returning value '1',
883 * blk_end_request_callback() returns immediately without completing it.
884 */
885 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
886 {
887 return 1;
888 }
889
890 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
891 {
892 ide_hwif_t *hwif = drive->hwif;
893 struct cdrom_info *info = drive->driver_data;
894 struct request *rq = HWGROUP(drive)->rq;
895 xfer_func_t *xferfunc;
896 ide_expiry_t *expiry = NULL;
897 int dma_error = 0, dma, stat, thislen, uptodate = 0;
898 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
899 unsigned int timeout;
900 u16 len;
901 u8 ireason;
902
903 /* check for errors */
904 dma = info->dma;
905 if (dma) {
906 info->dma = 0;
907 dma_error = hwif->dma_ops->dma_end(drive);
908 if (dma_error) {
909 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
910 write ? "write" : "read");
911 ide_dma_off(drive);
912 }
913 }
914
915 if (cdrom_decode_status(drive, 0, &stat))
916 return ide_stopped;
917
918 /* using dma, transfer is complete now */
919 if (dma) {
920 if (dma_error)
921 return ide_error(drive, "dma error", stat);
922 if (blk_fs_request(rq)) {
923 ide_end_request(drive, 1, rq->nr_sectors);
924 return ide_stopped;
925 }
926 goto end_request;
927 }
928
929 ide_read_bcount_and_ireason(drive, &len, &ireason);
930
931 thislen = blk_fs_request(rq) ? len : rq->data_len;
932 if (thislen > len)
933 thislen = len;
934
935 /* If DRQ is clear, the command has completed. */
936 if ((stat & ATA_DRQ) == 0) {
937 if (blk_fs_request(rq)) {
938 /*
939 * If we're not done reading/writing, complain.
940 * Otherwise, complete the command normally.
941 */
942 uptodate = 1;
943 if (rq->current_nr_sectors > 0) {
944 printk(KERN_ERR "%s: %s: data underrun "
945 "(%d blocks)\n",
946 drive->name, __func__,
947 rq->current_nr_sectors);
948 if (!write)
949 rq->cmd_flags |= REQ_FAILED;
950 uptodate = 0;
951 }
952 cdrom_end_request(drive, uptodate);
953 return ide_stopped;
954 } else if (!blk_pc_request(rq)) {
955 ide_cd_request_sense_fixup(rq);
956 /* complain if we still have data left to transfer */
957 uptodate = rq->data_len ? 0 : 1;
958 }
959 goto end_request;
960 }
961
962 /* check which way to transfer data */
963 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
964 return ide_stopped;
965
966 if (blk_fs_request(rq)) {
967 if (write == 0) {
968 int nskip;
969
970 if (ide_cd_check_transfer_size(drive, len)) {
971 cdrom_end_request(drive, 0);
972 return ide_stopped;
973 }
974
975 /*
976 * First, figure out if we need to bit-bucket
977 * any of the leading sectors.
978 */
979 nskip = min_t(int, rq->current_nr_sectors
980 - bio_cur_sectors(rq->bio),
981 thislen >> 9);
982 if (nskip > 0) {
983 ide_pad_transfer(drive, write, nskip << 9);
984 rq->current_nr_sectors -= nskip;
985 thislen -= (nskip << 9);
986 }
987 }
988 }
989
990 if (ireason == 0) {
991 write = 1;
992 xferfunc = hwif->tp_ops->output_data;
993 } else {
994 write = 0;
995 xferfunc = hwif->tp_ops->input_data;
996 }
997
998 /* transfer data */
999 while (thislen > 0) {
1000 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1001 int blen = rq->data_len;
1002
1003 /* bio backed? */
1004 if (rq->bio) {
1005 if (blk_fs_request(rq)) {
1006 ptr = rq->buffer;
1007 blen = rq->current_nr_sectors << 9;
1008 } else {
1009 ptr = bio_data(rq->bio);
1010 blen = bio_iovec(rq->bio)->bv_len;
1011 }
1012 }
1013
1014 if (!ptr) {
1015 if (blk_fs_request(rq) && !write)
1016 /*
1017 * If the buffers are full, pipe the rest into
1018 * oblivion.
1019 */
1020 ide_pad_transfer(drive, 0, thislen);
1021 else {
1022 printk(KERN_ERR "%s: confused, missing data\n",
1023 drive->name);
1024 blk_dump_rq_flags(rq, rq_data_dir(rq)
1025 ? "cdrom_newpc_intr, write"
1026 : "cdrom_newpc_intr, read");
1027 }
1028 break;
1029 }
1030
1031 if (blen > thislen)
1032 blen = thislen;
1033
1034 xferfunc(drive, NULL, ptr, blen);
1035
1036 thislen -= blen;
1037 len -= blen;
1038
1039 if (blk_fs_request(rq)) {
1040 rq->buffer += blen;
1041 rq->nr_sectors -= (blen >> 9);
1042 rq->current_nr_sectors -= (blen >> 9);
1043 rq->sector += (blen >> 9);
1044
1045 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1046 cdrom_end_request(drive, 1);
1047 } else {
1048 rq->data_len -= blen;
1049
1050 /*
1051 * The request can't be completed until DRQ is cleared.
1052 * So complete the data, but don't complete the request
1053 * using the dummy function for the callback feature
1054 * of blk_end_request_callback().
1055 */
1056 if (rq->bio)
1057 blk_end_request_callback(rq, 0, blen,
1058 cdrom_newpc_intr_dummy_cb);
1059 else
1060 rq->data += blen;
1061 }
1062 if (!write && blk_sense_request(rq))
1063 rq->sense_len += blen;
1064 }
1065
1066 /* pad, if necessary */
1067 if (!blk_fs_request(rq) && len > 0)
1068 ide_pad_transfer(drive, write, len);
1069
1070 if (blk_pc_request(rq)) {
1071 timeout = rq->timeout;
1072 } else {
1073 timeout = ATAPI_WAIT_PC;
1074 if (!blk_fs_request(rq))
1075 expiry = cdrom_timer_expiry;
1076 }
1077
1078 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1079 return ide_started;
1080
1081 end_request:
1082 if (blk_pc_request(rq)) {
1083 unsigned long flags;
1084 unsigned int dlen = rq->data_len;
1085
1086 if (dma)
1087 rq->data_len = 0;
1088
1089 spin_lock_irqsave(&ide_lock, flags);
1090 if (__blk_end_request(rq, 0, dlen))
1091 BUG();
1092 HWGROUP(drive)->rq = NULL;
1093 spin_unlock_irqrestore(&ide_lock, flags);
1094 } else {
1095 if (!uptodate)
1096 rq->cmd_flags |= REQ_FAILED;
1097 cdrom_end_request(drive, uptodate);
1098 }
1099 return ide_stopped;
1100 }
1101
1102 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1103 {
1104 struct cdrom_info *cd = drive->driver_data;
1105 int write = rq_data_dir(rq) == WRITE;
1106 unsigned short sectors_per_frame =
1107 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1108
1109 if (write) {
1110 /* disk has become write protected */
1111 if (get_disk_ro(cd->disk)) {
1112 cdrom_end_request(drive, 0);
1113 return ide_stopped;
1114 }
1115 } else {
1116 /*
1117 * We may be retrying this request after an error. Fix up any
1118 * weirdness which might be present in the request packet.
1119 */
1120 restore_request(rq);
1121 }
1122
1123 /* use DMA, if possible / writes *must* be hardware frame aligned */
1124 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1125 (rq->sector & (sectors_per_frame - 1))) {
1126 if (write) {
1127 cdrom_end_request(drive, 0);
1128 return ide_stopped;
1129 }
1130 cd->dma = 0;
1131 } else
1132 cd->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1133
1134 if (write)
1135 cd->devinfo.media_written = 1;
1136
1137 return ide_started;
1138 }
1139
1140 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1141 {
1142 struct request *rq = HWGROUP(drive)->rq;
1143
1144 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1145 }
1146
1147 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1148 {
1149 struct cdrom_info *info = drive->driver_data;
1150
1151 if (blk_pc_request(rq))
1152 rq->cmd_flags |= REQ_QUIET;
1153 else
1154 rq->cmd_flags &= ~REQ_FAILED;
1155
1156 info->dma = 0;
1157
1158 /* sg request */
1159 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1160 struct request_queue *q = drive->queue;
1161 unsigned int alignment;
1162 char *buf;
1163
1164 if (rq->bio)
1165 buf = bio_data(rq->bio);
1166 else
1167 buf = rq->data;
1168
1169 info->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1170
1171 /*
1172 * check if dma is safe
1173 *
1174 * NOTE! The "len" and "addr" checks should possibly have
1175 * separate masks.
1176 */
1177 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1178 if ((unsigned long)buf & alignment || rq->data_len & alignment
1179 || object_is_on_stack(buf))
1180 info->dma = 0;
1181 }
1182 }
1183
1184 /*
1185 * cdrom driver request routine.
1186 */
1187 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1188 sector_t block)
1189 {
1190 struct cdrom_info *info = drive->driver_data;
1191 ide_handler_t *fn;
1192 int xferlen;
1193
1194 if (blk_fs_request(rq)) {
1195 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1196 ide_hwif_t *hwif = drive->hwif;
1197 unsigned long elapsed = jiffies - info->start_seek;
1198 int stat = hwif->tp_ops->read_status(hwif);
1199
1200 if ((stat & ATA_DSC) != ATA_DSC) {
1201 if (elapsed < IDECD_SEEK_TIMEOUT) {
1202 ide_stall_queue(drive,
1203 IDECD_SEEK_TIMER);
1204 return ide_stopped;
1205 }
1206 printk(KERN_ERR "%s: DSC timeout\n",
1207 drive->name);
1208 }
1209 drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1210 }
1211 if (rq_data_dir(rq) == READ &&
1212 IDE_LARGE_SEEK(info->last_block, block,
1213 IDECD_SEEK_THRESHOLD) &&
1214 (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) {
1215 xferlen = 0;
1216 fn = cdrom_start_seek_continuation;
1217
1218 info->dma = 0;
1219 info->start_seek = jiffies;
1220
1221 ide_cd_prepare_seek_request(drive, rq);
1222 } else {
1223 xferlen = 32768;
1224 fn = cdrom_start_rw_cont;
1225
1226 if (cdrom_start_rw(drive, rq) == ide_stopped)
1227 return ide_stopped;
1228
1229 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1230 return ide_stopped;
1231 }
1232 info->last_block = block;
1233 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1234 rq->cmd_type == REQ_TYPE_ATA_PC) {
1235 xferlen = rq->data_len;
1236 fn = cdrom_do_newpc_cont;
1237
1238 if (!rq->timeout)
1239 rq->timeout = ATAPI_WAIT_PC;
1240
1241 cdrom_do_block_pc(drive, rq);
1242 } else if (blk_special_request(rq)) {
1243 /* right now this can only be a reset... */
1244 cdrom_end_request(drive, 1);
1245 return ide_stopped;
1246 } else {
1247 blk_dump_rq_flags(rq, "ide-cd bad flags");
1248 cdrom_end_request(drive, 0);
1249 return ide_stopped;
1250 }
1251
1252 return cdrom_start_packet_command(drive, xferlen, fn);
1253 }
1254
1255 /*
1256 * Ioctl handling.
1257 *
1258 * Routines which queue packet commands take as a final argument a pointer to a
1259 * request_sense struct. If execution of the command results in an error with a
1260 * CHECK CONDITION status, this structure will be filled with the results of the
1261 * subsequent request sense command. The pointer can also be NULL, in which case
1262 * no sense information is returned.
1263 */
1264 static void msf_from_bcd(struct atapi_msf *msf)
1265 {
1266 msf->minute = bcd2bin(msf->minute);
1267 msf->second = bcd2bin(msf->second);
1268 msf->frame = bcd2bin(msf->frame);
1269 }
1270
1271 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1272 {
1273 struct cdrom_info *info = drive->driver_data;
1274 struct cdrom_device_info *cdi = &info->devinfo;
1275 unsigned char cmd[BLK_MAX_CDB];
1276
1277 memset(cmd, 0, BLK_MAX_CDB);
1278 cmd[0] = GPCMD_TEST_UNIT_READY;
1279
1280 /*
1281 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1282 * instead of supporting the LOAD_UNLOAD opcode.
1283 */
1284 cmd[7] = cdi->sanyo_slot % 3;
1285
1286 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1287 }
1288
1289 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1290 unsigned long *sectors_per_frame,
1291 struct request_sense *sense)
1292 {
1293 struct {
1294 __be32 lba;
1295 __be32 blocklen;
1296 } capbuf;
1297
1298 int stat;
1299 unsigned char cmd[BLK_MAX_CDB];
1300 unsigned len = sizeof(capbuf);
1301 u32 blocklen;
1302
1303 memset(cmd, 0, BLK_MAX_CDB);
1304 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1305
1306 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1307 REQ_QUIET);
1308 if (stat)
1309 return stat;
1310
1311 /*
1312 * Sanity check the given block size
1313 */
1314 blocklen = be32_to_cpu(capbuf.blocklen);
1315 switch (blocklen) {
1316 case 512:
1317 case 1024:
1318 case 2048:
1319 case 4096:
1320 break;
1321 default:
1322 printk(KERN_ERR "%s: weird block size %u\n",
1323 drive->name, blocklen);
1324 printk(KERN_ERR "%s: default to 2kb block size\n",
1325 drive->name);
1326 blocklen = 2048;
1327 break;
1328 }
1329
1330 *capacity = 1 + be32_to_cpu(capbuf.lba);
1331 *sectors_per_frame = blocklen >> SECTOR_BITS;
1332 return 0;
1333 }
1334
1335 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1336 int format, char *buf, int buflen,
1337 struct request_sense *sense)
1338 {
1339 unsigned char cmd[BLK_MAX_CDB];
1340
1341 memset(cmd, 0, BLK_MAX_CDB);
1342
1343 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1344 cmd[6] = trackno;
1345 cmd[7] = (buflen >> 8);
1346 cmd[8] = (buflen & 0xff);
1347 cmd[9] = (format << 6);
1348
1349 if (msf_flag)
1350 cmd[1] = 2;
1351
1352 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1353 }
1354
1355 /* Try to read the entire TOC for the disk into our internal buffer. */
1356 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1357 {
1358 int stat, ntracks, i;
1359 struct cdrom_info *info = drive->driver_data;
1360 struct cdrom_device_info *cdi = &info->devinfo;
1361 struct atapi_toc *toc = info->toc;
1362 struct {
1363 struct atapi_toc_header hdr;
1364 struct atapi_toc_entry ent;
1365 } ms_tmp;
1366 long last_written;
1367 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1368
1369 if (toc == NULL) {
1370 /* try to allocate space */
1371 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1372 if (toc == NULL) {
1373 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1374 drive->name);
1375 return -ENOMEM;
1376 }
1377 info->toc = toc;
1378 }
1379
1380 /*
1381 * Check to see if the existing data is still valid. If it is,
1382 * just return.
1383 */
1384 (void) cdrom_check_status(drive, sense);
1385
1386 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1387 return 0;
1388
1389 /* try to get the total cdrom capacity and sector size */
1390 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1391 sense);
1392 if (stat)
1393 toc->capacity = 0x1fffff;
1394
1395 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1396 /* save a private copy of the TOC capacity for error handling */
1397 drive->probed_capacity = toc->capacity * sectors_per_frame;
1398
1399 blk_queue_hardsect_size(drive->queue,
1400 sectors_per_frame << SECTOR_BITS);
1401
1402 /* first read just the header, so we know how long the TOC is */
1403 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1404 sizeof(struct atapi_toc_header), sense);
1405 if (stat)
1406 return stat;
1407
1408 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1409 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1410 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1411 }
1412
1413 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1414 if (ntracks <= 0)
1415 return -EIO;
1416 if (ntracks > MAX_TRACKS)
1417 ntracks = MAX_TRACKS;
1418
1419 /* now read the whole schmeer */
1420 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1421 (char *)&toc->hdr,
1422 sizeof(struct atapi_toc_header) +
1423 (ntracks + 1) *
1424 sizeof(struct atapi_toc_entry), sense);
1425
1426 if (stat && toc->hdr.first_track > 1) {
1427 /*
1428 * Cds with CDI tracks only don't have any TOC entries, despite
1429 * of this the returned values are
1430 * first_track == last_track = number of CDI tracks + 1,
1431 * so that this case is indistinguishable from the same layout
1432 * plus an additional audio track. If we get an error for the
1433 * regular case, we assume a CDI without additional audio
1434 * tracks. In this case the readable TOC is empty (CDI tracks
1435 * are not included) and only holds the Leadout entry.
1436 *
1437 * Heiko Eißfeldt.
1438 */
1439 ntracks = 0;
1440 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1441 (char *)&toc->hdr,
1442 sizeof(struct atapi_toc_header) +
1443 (ntracks + 1) *
1444 sizeof(struct atapi_toc_entry),
1445 sense);
1446 if (stat)
1447 return stat;
1448
1449 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1450 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1451 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1452 } else {
1453 toc->hdr.first_track = CDROM_LEADOUT;
1454 toc->hdr.last_track = CDROM_LEADOUT;
1455 }
1456 }
1457
1458 if (stat)
1459 return stat;
1460
1461 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1462
1463 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1464 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1465 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1466 }
1467
1468 for (i = 0; i <= ntracks; i++) {
1469 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1470 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1471 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1472 msf_from_bcd(&toc->ent[i].addr.msf);
1473 }
1474 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1475 toc->ent[i].addr.msf.second,
1476 toc->ent[i].addr.msf.frame);
1477 }
1478
1479 if (toc->hdr.first_track != CDROM_LEADOUT) {
1480 /* read the multisession information */
1481 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1482 sizeof(ms_tmp), sense);
1483 if (stat)
1484 return stat;
1485
1486 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1487 } else {
1488 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1489 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1490 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1491 }
1492
1493 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1494 /* re-read multisession information using MSF format */
1495 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1496 sizeof(ms_tmp), sense);
1497 if (stat)
1498 return stat;
1499
1500 msf_from_bcd(&ms_tmp.ent.addr.msf);
1501 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1502 ms_tmp.ent.addr.msf.second,
1503 ms_tmp.ent.addr.msf.frame);
1504 }
1505
1506 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1507
1508 /* now try to get the total cdrom capacity */
1509 stat = cdrom_get_last_written(cdi, &last_written);
1510 if (!stat && (last_written > toc->capacity)) {
1511 toc->capacity = last_written;
1512 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1513 drive->probed_capacity = toc->capacity * sectors_per_frame;
1514 }
1515
1516 /* Remember that we've read this stuff. */
1517 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1518
1519 return 0;
1520 }
1521
1522 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1523 {
1524 struct cdrom_info *info = drive->driver_data;
1525 struct cdrom_device_info *cdi = &info->devinfo;
1526 struct packet_command cgc;
1527 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1528
1529 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1530 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1531
1532 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1533 do {
1534 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1535 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1536 if (!stat)
1537 break;
1538 } while (--attempts);
1539 return stat;
1540 }
1541
1542 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1543 {
1544 struct cdrom_info *cd = drive->driver_data;
1545 u16 curspeed, maxspeed;
1546
1547 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1548 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1549 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1550 } else {
1551 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1552 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1553 }
1554
1555 cd->current_speed = (curspeed + (176/2)) / 176;
1556 cd->max_speed = (maxspeed + (176/2)) / 176;
1557 }
1558
1559 #define IDE_CD_CAPABILITIES \
1560 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1561 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1562 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1563 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1564 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1565
1566 static struct cdrom_device_ops ide_cdrom_dops = {
1567 .open = ide_cdrom_open_real,
1568 .release = ide_cdrom_release_real,
1569 .drive_status = ide_cdrom_drive_status,
1570 .media_changed = ide_cdrom_check_media_change_real,
1571 .tray_move = ide_cdrom_tray_move,
1572 .lock_door = ide_cdrom_lock_door,
1573 .select_speed = ide_cdrom_select_speed,
1574 .get_last_session = ide_cdrom_get_last_session,
1575 .get_mcn = ide_cdrom_get_mcn,
1576 .reset = ide_cdrom_reset,
1577 .audio_ioctl = ide_cdrom_audio_ioctl,
1578 .capability = IDE_CD_CAPABILITIES,
1579 .generic_packet = ide_cdrom_packet,
1580 };
1581
1582 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1583 {
1584 struct cdrom_info *info = drive->driver_data;
1585 struct cdrom_device_info *devinfo = &info->devinfo;
1586
1587 devinfo->ops = &ide_cdrom_dops;
1588 devinfo->speed = info->current_speed;
1589 devinfo->capacity = nslots;
1590 devinfo->handle = drive;
1591 strcpy(devinfo->name, drive->name);
1592
1593 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1594 devinfo->mask |= CDC_SELECT_SPEED;
1595
1596 devinfo->disk = info->disk;
1597 return register_cdrom(devinfo);
1598 }
1599
1600 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1601 {
1602 struct cdrom_info *cd = drive->driver_data;
1603 struct cdrom_device_info *cdi = &cd->devinfo;
1604 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1605 mechtype_t mechtype;
1606 int nslots = 1;
1607
1608 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1609 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1610 CDC_MO_DRIVE | CDC_RAM);
1611
1612 if (drive->media == ide_optical) {
1613 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1614 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1615 drive->name);
1616 return nslots;
1617 }
1618
1619 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1620 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1621 cdi->mask &= ~CDC_PLAY_AUDIO;
1622 return nslots;
1623 }
1624
1625 /*
1626 * We have to cheat a little here. the packet will eventually be queued
1627 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1628 * Since this device hasn't been registered with the Uniform layer yet,
1629 * it can't do this. Same goes for cdi->ops.
1630 */
1631 cdi->handle = drive;
1632 cdi->ops = &ide_cdrom_dops;
1633
1634 if (ide_cdrom_get_capabilities(drive, buf))
1635 return 0;
1636
1637 if ((buf[8 + 6] & 0x01) == 0)
1638 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1639 if (buf[8 + 6] & 0x08)
1640 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1641 if (buf[8 + 3] & 0x01)
1642 cdi->mask &= ~CDC_CD_R;
1643 if (buf[8 + 3] & 0x02)
1644 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1645 if (buf[8 + 2] & 0x38)
1646 cdi->mask &= ~CDC_DVD;
1647 if (buf[8 + 3] & 0x20)
1648 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1649 if (buf[8 + 3] & 0x10)
1650 cdi->mask &= ~CDC_DVD_R;
1651 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1652 cdi->mask &= ~CDC_PLAY_AUDIO;
1653
1654 mechtype = buf[8 + 6] >> 5;
1655 if (mechtype == mechtype_caddy ||
1656 mechtype == mechtype_popup ||
1657 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1658 cdi->mask |= CDC_CLOSE_TRAY;
1659
1660 if (cdi->sanyo_slot > 0) {
1661 cdi->mask &= ~CDC_SELECT_DISC;
1662 nslots = 3;
1663 } else if (mechtype == mechtype_individual_changer ||
1664 mechtype == mechtype_cartridge_changer) {
1665 nslots = cdrom_number_of_slots(cdi);
1666 if (nslots > 1)
1667 cdi->mask &= ~CDC_SELECT_DISC;
1668 }
1669
1670 ide_cdrom_update_speed(drive, buf);
1671
1672 printk(KERN_INFO "%s: ATAPI", drive->name);
1673
1674 /* don't print speed if the drive reported 0 */
1675 if (cd->max_speed)
1676 printk(KERN_CONT " %dX", cd->max_speed);
1677
1678 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1679
1680 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1681 printk(KERN_CONT " DVD%s%s",
1682 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1683 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1684
1685 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1686 printk(KERN_CONT " CD%s%s",
1687 (cdi->mask & CDC_CD_R) ? "" : "-R",
1688 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1689
1690 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1691 printk(KERN_CONT " changer w/%d slots", nslots);
1692 else
1693 printk(KERN_CONT " drive");
1694
1695 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12]));
1696
1697 return nslots;
1698 }
1699
1700 /* standard prep_rq_fn that builds 10 byte cmds */
1701 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1702 {
1703 int hard_sect = queue_hardsect_size(q);
1704 long block = (long)rq->hard_sector / (hard_sect >> 9);
1705 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1706
1707 memset(rq->cmd, 0, BLK_MAX_CDB);
1708
1709 if (rq_data_dir(rq) == READ)
1710 rq->cmd[0] = GPCMD_READ_10;
1711 else
1712 rq->cmd[0] = GPCMD_WRITE_10;
1713
1714 /*
1715 * fill in lba
1716 */
1717 rq->cmd[2] = (block >> 24) & 0xff;
1718 rq->cmd[3] = (block >> 16) & 0xff;
1719 rq->cmd[4] = (block >> 8) & 0xff;
1720 rq->cmd[5] = block & 0xff;
1721
1722 /*
1723 * and transfer length
1724 */
1725 rq->cmd[7] = (blocks >> 8) & 0xff;
1726 rq->cmd[8] = blocks & 0xff;
1727 rq->cmd_len = 10;
1728 return BLKPREP_OK;
1729 }
1730
1731 /*
1732 * Most of the SCSI commands are supported directly by ATAPI devices.
1733 * This transform handles the few exceptions.
1734 */
1735 static int ide_cdrom_prep_pc(struct request *rq)
1736 {
1737 u8 *c = rq->cmd;
1738
1739 /* transform 6-byte read/write commands to the 10-byte version */
1740 if (c[0] == READ_6 || c[0] == WRITE_6) {
1741 c[8] = c[4];
1742 c[5] = c[3];
1743 c[4] = c[2];
1744 c[3] = c[1] & 0x1f;
1745 c[2] = 0;
1746 c[1] &= 0xe0;
1747 c[0] += (READ_10 - READ_6);
1748 rq->cmd_len = 10;
1749 return BLKPREP_OK;
1750 }
1751
1752 /*
1753 * it's silly to pretend we understand 6-byte sense commands, just
1754 * reject with ILLEGAL_REQUEST and the caller should take the
1755 * appropriate action
1756 */
1757 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1758 rq->errors = ILLEGAL_REQUEST;
1759 return BLKPREP_KILL;
1760 }
1761
1762 return BLKPREP_OK;
1763 }
1764
1765 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1766 {
1767 if (blk_fs_request(rq))
1768 return ide_cdrom_prep_fs(q, rq);
1769 else if (blk_pc_request(rq))
1770 return ide_cdrom_prep_pc(rq);
1771
1772 return 0;
1773 }
1774
1775 struct cd_list_entry {
1776 const char *id_model;
1777 const char *id_firmware;
1778 unsigned int cd_flags;
1779 };
1780
1781 #ifdef CONFIG_IDE_PROC_FS
1782 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1783 {
1784 unsigned long capacity, sectors_per_frame;
1785
1786 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1787 return 0;
1788
1789 return capacity * sectors_per_frame;
1790 }
1791
1792 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1793 int count, int *eof, void *data)
1794 {
1795 ide_drive_t *drive = data;
1796 int len;
1797
1798 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1799 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1800 }
1801
1802 static ide_proc_entry_t idecd_proc[] = {
1803 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1804 { NULL, 0, NULL, NULL }
1805 };
1806
1807 ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
1808
1809 static const struct ide_proc_devset idecd_settings[] = {
1810 IDE_PROC_DEVSET(dsc_overlap, 0, 1),
1811 { 0 },
1812 };
1813 #endif
1814
1815 static const struct cd_list_entry ide_cd_quirks_list[] = {
1816 /* Limit transfer size per interrupt. */
1817 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1818 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1819 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1820 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1821 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1822 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1823 IDE_AFLAG_PRE_ATAPI12, },
1824 /* Vertos 300, some versions of this drive like to talk BCD. */
1825 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1826 /* Vertos 600 ESD. */
1827 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1828 /*
1829 * Sanyo 3 CD changer uses a non-standard command for CD changing
1830 * (by default standard ATAPI support for CD changers is used).
1831 */
1832 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1833 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1834 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1835 /* Stingray 8X CD-ROM. */
1836 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1837 /*
1838 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1839 * mode sense page capabilities size, but older drives break.
1840 */
1841 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1842 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1843 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1844 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1845 /*
1846 * Some drives used by Apple don't advertise audio play
1847 * but they do support reading TOC & audio datas.
1848 */
1849 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1850 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1851 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1852 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1853 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1854 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1855 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1856 { NULL, NULL, 0 }
1857 };
1858
1859 static unsigned int ide_cd_flags(u16 *id)
1860 {
1861 const struct cd_list_entry *cle = ide_cd_quirks_list;
1862
1863 while (cle->id_model) {
1864 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1865 (cle->id_firmware == NULL ||
1866 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1867 return cle->cd_flags;
1868 cle++;
1869 }
1870
1871 return 0;
1872 }
1873
1874 static int ide_cdrom_setup(ide_drive_t *drive)
1875 {
1876 struct cdrom_info *cd = drive->driver_data;
1877 struct cdrom_device_info *cdi = &cd->devinfo;
1878 u16 *id = drive->id;
1879 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1880 int nslots;
1881
1882 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1883 blk_queue_dma_alignment(drive->queue, 31);
1884 blk_queue_update_dma_pad(drive->queue, 15);
1885 drive->queue->unplug_delay = (1 * HZ) / 1000;
1886 if (!drive->queue->unplug_delay)
1887 drive->queue->unplug_delay = 1;
1888
1889 drive->special.all = 0;
1890
1891 drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1892 ide_cd_flags(id);
1893
1894 if ((id[ATA_ID_CONFIG] & 0x0060) == 0x20)
1895 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1896
1897 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1898 fw_rev[4] == '1' && fw_rev[6] <= '2')
1899 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1900 IDE_AFLAG_TOCADDR_AS_BCD);
1901 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1902 fw_rev[4] == '1' && fw_rev[6] <= '2')
1903 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1904 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1905 /* 3 => use CD in slot 0 */
1906 cdi->sanyo_slot = 3;
1907
1908 nslots = ide_cdrom_probe_capabilities(drive);
1909
1910 /* set correct block size */
1911 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1912
1913 if (drive->next != drive)
1914 drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
1915 else
1916 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
1917
1918 if (ide_cdrom_register(drive, nslots)) {
1919 printk(KERN_ERR "%s: %s failed to register device with the"
1920 " cdrom driver.\n", drive->name, __func__);
1921 cd->devinfo.handle = NULL;
1922 return 1;
1923 }
1924
1925 ide_proc_register_driver(drive, cd->driver);
1926 return 0;
1927 }
1928
1929 static void ide_cd_remove(ide_drive_t *drive)
1930 {
1931 struct cdrom_info *info = drive->driver_data;
1932
1933 ide_proc_unregister_driver(drive, info->driver);
1934
1935 del_gendisk(info->disk);
1936
1937 ide_cd_put(info);
1938 }
1939
1940 static void ide_cd_release(struct kref *kref)
1941 {
1942 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1943 struct cdrom_device_info *devinfo = &info->devinfo;
1944 ide_drive_t *drive = info->drive;
1945 struct gendisk *g = info->disk;
1946
1947 kfree(info->toc);
1948 if (devinfo->handle == drive)
1949 unregister_cdrom(devinfo);
1950 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
1951 drive->driver_data = NULL;
1952 blk_queue_prep_rq(drive->queue, NULL);
1953 g->private_data = NULL;
1954 put_disk(g);
1955 kfree(info);
1956 }
1957
1958 static int ide_cd_probe(ide_drive_t *);
1959
1960 static ide_driver_t ide_cdrom_driver = {
1961 .gen_driver = {
1962 .owner = THIS_MODULE,
1963 .name = "ide-cdrom",
1964 .bus = &ide_bus_type,
1965 },
1966 .probe = ide_cd_probe,
1967 .remove = ide_cd_remove,
1968 .version = IDECD_VERSION,
1969 .media = ide_cdrom,
1970 .do_request = ide_cd_do_request,
1971 .end_request = ide_end_request,
1972 .error = __ide_error,
1973 #ifdef CONFIG_IDE_PROC_FS
1974 .proc = idecd_proc,
1975 .settings = idecd_settings,
1976 #endif
1977 };
1978
1979 static int idecd_open(struct inode *inode, struct file *file)
1980 {
1981 struct gendisk *disk = inode->i_bdev->bd_disk;
1982 struct cdrom_info *info;
1983 int rc = -ENOMEM;
1984
1985 info = ide_cd_get(disk);
1986 if (!info)
1987 return -ENXIO;
1988
1989 rc = cdrom_open(&info->devinfo, inode, file);
1990
1991 if (rc < 0)
1992 ide_cd_put(info);
1993
1994 return rc;
1995 }
1996
1997 static int idecd_release(struct inode *inode, struct file *file)
1998 {
1999 struct gendisk *disk = inode->i_bdev->bd_disk;
2000 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2001
2002 cdrom_release(&info->devinfo, file);
2003
2004 ide_cd_put(info);
2005
2006 return 0;
2007 }
2008
2009 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2010 {
2011 struct packet_command cgc;
2012 char buffer[16];
2013 int stat;
2014 char spindown;
2015
2016 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2017 return -EFAULT;
2018
2019 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2020
2021 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2022 if (stat)
2023 return stat;
2024
2025 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2026 return cdrom_mode_select(cdi, &cgc);
2027 }
2028
2029 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2030 {
2031 struct packet_command cgc;
2032 char buffer[16];
2033 int stat;
2034 char spindown;
2035
2036 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2037
2038 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2039 if (stat)
2040 return stat;
2041
2042 spindown = buffer[11] & 0x0f;
2043 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2044 return -EFAULT;
2045 return 0;
2046 }
2047
2048 static int idecd_ioctl(struct inode *inode, struct file *file,
2049 unsigned int cmd, unsigned long arg)
2050 {
2051 struct block_device *bdev = inode->i_bdev;
2052 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2053 int err;
2054
2055 switch (cmd) {
2056 case CDROMSETSPINDOWN:
2057 return idecd_set_spindown(&info->devinfo, arg);
2058 case CDROMGETSPINDOWN:
2059 return idecd_get_spindown(&info->devinfo, arg);
2060 default:
2061 break;
2062 }
2063
2064 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2065 if (err == -EINVAL)
2066 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2067
2068 return err;
2069 }
2070
2071 static int idecd_media_changed(struct gendisk *disk)
2072 {
2073 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2074 return cdrom_media_changed(&info->devinfo);
2075 }
2076
2077 static int idecd_revalidate_disk(struct gendisk *disk)
2078 {
2079 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2080 struct request_sense sense;
2081
2082 ide_cd_read_toc(info->drive, &sense);
2083
2084 return 0;
2085 }
2086
2087 static struct block_device_operations idecd_ops = {
2088 .owner = THIS_MODULE,
2089 .open = idecd_open,
2090 .release = idecd_release,
2091 .ioctl = idecd_ioctl,
2092 .media_changed = idecd_media_changed,
2093 .revalidate_disk = idecd_revalidate_disk
2094 };
2095
2096 /* module options */
2097 static char *ignore;
2098
2099 module_param(ignore, charp, 0400);
2100 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2101
2102 static int ide_cd_probe(ide_drive_t *drive)
2103 {
2104 struct cdrom_info *info;
2105 struct gendisk *g;
2106 struct request_sense sense;
2107
2108 if (!strstr("ide-cdrom", drive->driver_req))
2109 goto failed;
2110
2111 if (drive->media != ide_cdrom && drive->media != ide_optical)
2112 goto failed;
2113
2114 /* skip drives that we were told to ignore */
2115 if (ignore != NULL) {
2116 if (strstr(ignore, drive->name)) {
2117 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2118 drive->name);
2119 goto failed;
2120 }
2121 }
2122 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2123 if (info == NULL) {
2124 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2125 drive->name);
2126 goto failed;
2127 }
2128
2129 g = alloc_disk(1 << PARTN_BITS);
2130 if (!g)
2131 goto out_free_cd;
2132
2133 ide_init_disk(g, drive);
2134
2135 kref_init(&info->kref);
2136
2137 info->drive = drive;
2138 info->driver = &ide_cdrom_driver;
2139 info->disk = g;
2140
2141 g->private_data = &info->driver;
2142
2143 drive->driver_data = info;
2144
2145 g->minors = 1;
2146 g->driverfs_dev = &drive->gendev;
2147 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2148 if (ide_cdrom_setup(drive)) {
2149 ide_cd_release(&info->kref);
2150 goto failed;
2151 }
2152
2153 ide_cd_read_toc(drive, &sense);
2154 g->fops = &idecd_ops;
2155 g->flags |= GENHD_FL_REMOVABLE;
2156 add_disk(g);
2157 return 0;
2158
2159 out_free_cd:
2160 kfree(info);
2161 failed:
2162 return -ENODEV;
2163 }
2164
2165 static void __exit ide_cdrom_exit(void)
2166 {
2167 driver_unregister(&ide_cdrom_driver.gen_driver);
2168 }
2169
2170 static int __init ide_cdrom_init(void)
2171 {
2172 return driver_register(&ide_cdrom_driver.gen_driver);
2173 }
2174
2175 MODULE_ALIAS("ide:*m-cdrom*");
2176 MODULE_ALIAS("ide-cd");
2177 module_init(ide_cdrom_init);
2178 module_exit(ide_cdrom_exit);
2179 MODULE_LICENSE("GPL");
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