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aufs: policies for multiple writable branches, from aufs2.2-3.0
[zen-stable.git] / drivers / ide / ide-cd.c
blob8126824daccba7726b637ef1358b80cfa3b49468
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, 2007-2009 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/seq_file.h>
34 #include <linux/slab.h>
35 #include <linux/interrupt.h>
36 #include <linux/errno.h>
37 #include <linux/cdrom.h>
38 #include <linux/ide.h>
39 #include <linux/completion.h>
40 #include <linux/mutex.h>
41 #include <linux/bcd.h>
42
43 /* For SCSI -> ATAPI command conversion */
44 #include <scsi/scsi.h>
45
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(ide_cd_mutex);
54 static DEFINE_MUTEX(idecd_ref_mutex);
55
56 static void ide_cd_release(struct device *);
57
58 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
59 {
60 struct cdrom_info *cd = NULL;
61
62 mutex_lock(&idecd_ref_mutex);
63 cd = ide_drv_g(disk, cdrom_info);
64 if (cd) {
65 if (ide_device_get(cd->drive))
66 cd = NULL;
67 else
68 get_device(&cd->dev);
69
70 }
71 mutex_unlock(&idecd_ref_mutex);
72 return cd;
73 }
74
75 static void ide_cd_put(struct cdrom_info *cd)
76 {
77 ide_drive_t *drive = cd->drive;
78
79 mutex_lock(&idecd_ref_mutex);
80 put_device(&cd->dev);
81 ide_device_put(drive);
82 mutex_unlock(&idecd_ref_mutex);
83 }
84
85 /*
86 * Generic packet command support and error handling routines.
87 */
88
89 /* Mark that we've seen a media change and invalidate our internal buffers. */
90 static void cdrom_saw_media_change(ide_drive_t *drive)
91 {
92 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
93 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
94 }
95
96 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
97 {
98 struct request_sense *sense = &drive->sense_data;
99 int log = 0;
100
101 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
102 return 0;
103
104 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
105
106 switch (sense->sense_key) {
107 case NO_SENSE:
108 case RECOVERED_ERROR:
109 break;
110 case NOT_READY:
111 /*
112 * don't care about tray state messages for e.g. capacity
113 * commands or in-progress or becoming ready
114 */
115 if (sense->asc == 0x3a || sense->asc == 0x04)
116 break;
117 log = 1;
118 break;
119 case ILLEGAL_REQUEST:
120 /*
121 * don't log START_STOP unit with LoEj set, since we cannot
122 * reliably check if drive can auto-close
123 */
124 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
125 break;
126 log = 1;
127 break;
128 case UNIT_ATTENTION:
129 /*
130 * Make good and sure we've seen this potential media change.
131 * Some drives (i.e. Creative) fail to present the correct sense
132 * key in the error register.
133 */
134 cdrom_saw_media_change(drive);
135 break;
136 default:
137 log = 1;
138 break;
139 }
140 return log;
141 }
142
143 static void cdrom_analyze_sense_data(ide_drive_t *drive,
144 struct request *failed_command)
145 {
146 struct request_sense *sense = &drive->sense_data;
147 struct cdrom_info *info = drive->driver_data;
148 unsigned long sector;
149 unsigned long bio_sectors;
150
151 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
152 sense->error_code, sense->sense_key);
153
154 if (failed_command)
155 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
156 failed_command->cmd[0]);
157
158 if (!cdrom_log_sense(drive, failed_command))
159 return;
160
161 /*
162 * If a read toc is executed for a CD-R or CD-RW medium where the first
163 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
164 * confusing error)
165 */
166 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
167 if (sense->sense_key == 0x05 && sense->asc == 0x24)
168 return;
169
170 /* current error */
171 if (sense->error_code == 0x70) {
172 switch (sense->sense_key) {
173 case MEDIUM_ERROR:
174 case VOLUME_OVERFLOW:
175 case ILLEGAL_REQUEST:
176 if (!sense->valid)
177 break;
178 if (failed_command == NULL ||
179 failed_command->cmd_type != REQ_TYPE_FS)
180 break;
181 sector = (sense->information[0] << 24) |
182 (sense->information[1] << 16) |
183 (sense->information[2] << 8) |
184 (sense->information[3]);
185
186 if (queue_logical_block_size(drive->queue) == 2048)
187 /* device sector size is 2K */
188 sector <<= 2;
189
190 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
191 sector &= ~(bio_sectors - 1);
192
193 /*
194 * The SCSI specification allows for the value
195 * returned by READ CAPACITY to be up to 75 2K
196 * sectors past the last readable block.
197 * Therefore, if we hit a medium error within the
198 * last 75 2K sectors, we decrease the saved size
199 * value.
200 */
201 if (sector < get_capacity(info->disk) &&
202 drive->probed_capacity - sector < 4 * 75)
203 set_capacity(info->disk, sector);
204 }
205 }
206
207 ide_cd_log_error(drive->name, failed_command, sense);
208 }
209
210 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
211 {
212 /*
213 * For REQ_TYPE_SENSE, "rq->special" points to the original
214 * failed request. Also, the sense data should be read
215 * directly from rq which might be different from the original
216 * sense buffer if it got copied during mapping.
217 */
218 struct request *failed = (struct request *)rq->special;
219 void *sense = bio_data(rq->bio);
220
221 if (failed) {
222 if (failed->sense) {
223 /*
224 * Sense is always read into drive->sense_data.
225 * Copy back if the failed request has its
226 * sense pointer set.
227 */
228 memcpy(failed->sense, sense, 18);
229 failed->sense_len = rq->sense_len;
230 }
231 cdrom_analyze_sense_data(drive, failed);
232
233 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
234 BUG();
235 } else
236 cdrom_analyze_sense_data(drive, NULL);
237 }
238
239
240 /*
241 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
242 * while flushing data from cache.
243 *
244 * returns: 0 failed (write timeout expired)
245 * 1 success
246 */
247 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
248 {
249
250 struct cdrom_info *info = drive->driver_data;
251
252 if (!rq->errors)
253 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
254
255 rq->errors = 1;
256
257 if (time_after(jiffies, info->write_timeout))
258 return 0;
259 else {
260 /*
261 * take a breather
262 */
263 blk_delay_queue(drive->queue, 1);
264 return 1;
265 }
266 }
267
268 /**
269 * Returns:
270 * 0: if the request should be continued.
271 * 1: if the request will be going through error recovery.
272 * 2: if the request should be ended.
273 */
274 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
275 {
276 ide_hwif_t *hwif = drive->hwif;
277 struct request *rq = hwif->rq;
278 int err, sense_key, do_end_request = 0;
279
280 /* get the IDE error register */
281 err = ide_read_error(drive);
282 sense_key = err >> 4;
283
284 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
285 "stat 0x%x",
286 rq->cmd[0], rq->cmd_type, err, stat);
287
288 if (rq->cmd_type == REQ_TYPE_SENSE) {
289 /*
290 * We got an error trying to get sense info from the drive
291 * (probably while trying to recover from a former error).
292 * Just give up.
293 */
294 rq->cmd_flags |= REQ_FAILED;
295 return 2;
296 }
297
298 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
299 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
300 rq->errors = SAM_STAT_CHECK_CONDITION;
301
302 if (blk_noretry_request(rq))
303 do_end_request = 1;
304
305 switch (sense_key) {
306 case NOT_READY:
307 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
308 if (ide_cd_breathe(drive, rq))
309 return 1;
310 } else {
311 cdrom_saw_media_change(drive);
312
313 if (rq->cmd_type == REQ_TYPE_FS &&
314 !(rq->cmd_flags & REQ_QUIET))
315 printk(KERN_ERR PFX "%s: tray open\n",
316 drive->name);
317 }
318 do_end_request = 1;
319 break;
320 case UNIT_ATTENTION:
321 cdrom_saw_media_change(drive);
322
323 if (rq->cmd_type != REQ_TYPE_FS)
324 return 0;
325
326 /*
327 * Arrange to retry the request but be sure to give up if we've
328 * retried too many times.
329 */
330 if (++rq->errors > ERROR_MAX)
331 do_end_request = 1;
332 break;
333 case ILLEGAL_REQUEST:
334 /*
335 * Don't print error message for this condition -- SFF8090i
336 * indicates that 5/24/00 is the correct response to a request
337 * to close the tray if the drive doesn't have that capability.
338 *
339 * cdrom_log_sense() knows this!
340 */
341 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
342 break;
343 /* fall-through */
344 case DATA_PROTECT:
345 /*
346 * No point in retrying after an illegal request or data
347 * protect error.
348 */
349 if (!(rq->cmd_flags & REQ_QUIET))
350 ide_dump_status(drive, "command error", stat);
351 do_end_request = 1;
352 break;
353 case MEDIUM_ERROR:
354 /*
355 * No point in re-trying a zillion times on a bad sector.
356 * If we got here the error is not correctable.
357 */
358 if (!(rq->cmd_flags & REQ_QUIET))
359 ide_dump_status(drive, "media error "
360 "(bad sector)", stat);
361 do_end_request = 1;
362 break;
363 case BLANK_CHECK:
364 /* disk appears blank? */
365 if (!(rq->cmd_flags & REQ_QUIET))
366 ide_dump_status(drive, "media error (blank)",
367 stat);
368 do_end_request = 1;
369 break;
370 default:
371 if (rq->cmd_type != REQ_TYPE_FS)
372 break;
373 if (err & ~ATA_ABORTED) {
374 /* go to the default handler for other errors */
375 ide_error(drive, "cdrom_decode_status", stat);
376 return 1;
377 } else if (++rq->errors > ERROR_MAX)
378 /* we've racked up too many retries, abort */
379 do_end_request = 1;
380 }
381
382 if (rq->cmd_type != REQ_TYPE_FS) {
383 rq->cmd_flags |= REQ_FAILED;
384 do_end_request = 1;
385 }
386
387 /*
388 * End a request through request sense analysis when we have sense data.
389 * We need this in order to perform end of media processing.
390 */
391 if (do_end_request)
392 goto end_request;
393
394 /* if we got a CHECK_CONDITION status, queue a request sense command */
395 if (stat & ATA_ERR)
396 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
397 return 1;
398
399 end_request:
400 if (stat & ATA_ERR) {
401 hwif->rq = NULL;
402 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
403 } else
404 return 2;
405 }
406
407 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
408 {
409 struct request *rq = cmd->rq;
410
411 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
412
413 /*
414 * Some of the trailing request sense fields are optional,
415 * and some drives don't send them. Sigh.
416 */
417 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
418 cmd->nleft > 0 && cmd->nleft <= 5)
419 cmd->nleft = 0;
420 }
421
422 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
423 int write, void *buffer, unsigned *bufflen,
424 struct request_sense *sense, int timeout,
425 unsigned int cmd_flags)
426 {
427 struct cdrom_info *info = drive->driver_data;
428 struct request_sense local_sense;
429 int retries = 10;
430 unsigned int flags = 0;
431
432 if (!sense)
433 sense = &local_sense;
434
435 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
436 "cmd_flags: 0x%x",
437 cmd[0], write, timeout, cmd_flags);
438
439 /* start of retry loop */
440 do {
441 struct request *rq;
442 int error;
443
444 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
445
446 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
447 rq->cmd_type = REQ_TYPE_ATA_PC;
448 rq->sense = sense;
449 rq->cmd_flags |= cmd_flags;
450 rq->timeout = timeout;
451 if (buffer) {
452 error = blk_rq_map_kern(drive->queue, rq, buffer,
453 *bufflen, GFP_NOIO);
454 if (error) {
455 blk_put_request(rq);
456 return error;
457 }
458 }
459
460 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
461
462 if (buffer)
463 *bufflen = rq->resid_len;
464
465 flags = rq->cmd_flags;
466 blk_put_request(rq);
467
468 /*
469 * FIXME: we should probably abort/retry or something in case of
470 * failure.
471 */
472 if (flags & REQ_FAILED) {
473 /*
474 * The request failed. Retry if it was due to a unit
475 * attention status (usually means media was changed).
476 */
477 struct request_sense *reqbuf = sense;
478
479 if (reqbuf->sense_key == UNIT_ATTENTION)
480 cdrom_saw_media_change(drive);
481 else if (reqbuf->sense_key == NOT_READY &&
482 reqbuf->asc == 4 && reqbuf->ascq != 4) {
483 /*
484 * The drive is in the process of loading
485 * a disk. Retry, but wait a little to give
486 * the drive time to complete the load.
487 */
488 ssleep(2);
489 } else {
490 /* otherwise, don't retry */
491 retries = 0;
492 }
493 --retries;
494 }
495
496 /* end of retry loop */
497 } while ((flags & REQ_FAILED) && retries >= 0);
498
499 /* return an error if the command failed */
500 return (flags & REQ_FAILED) ? -EIO : 0;
501 }
502
503 /*
504 * returns true if rq has been completed
505 */
506 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
507 {
508 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
509
510 if (cmd->tf_flags & IDE_TFLAG_WRITE)
511 nr_bytes -= cmd->last_xfer_len;
512
513 if (nr_bytes > 0) {
514 ide_complete_rq(drive, 0, nr_bytes);
515 return true;
516 }
517
518 return false;
519 }
520
521 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
522 {
523 ide_hwif_t *hwif = drive->hwif;
524 struct ide_cmd *cmd = &hwif->cmd;
525 struct request *rq = hwif->rq;
526 ide_expiry_t *expiry = NULL;
527 int dma_error = 0, dma, thislen, uptodate = 0;
528 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
529 int sense = (rq->cmd_type == REQ_TYPE_SENSE);
530 unsigned int timeout;
531 u16 len;
532 u8 ireason, stat;
533
534 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
535
536 /* check for errors */
537 dma = drive->dma;
538 if (dma) {
539 drive->dma = 0;
540 drive->waiting_for_dma = 0;
541 dma_error = hwif->dma_ops->dma_end(drive);
542 ide_dma_unmap_sg(drive, cmd);
543 if (dma_error) {
544 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
545 write ? "write" : "read");
546 ide_dma_off(drive);
547 }
548 }
549
550 /* check status */
551 stat = hwif->tp_ops->read_status(hwif);
552
553 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
554 rc = cdrom_decode_status(drive, stat);
555 if (rc) {
556 if (rc == 2)
557 goto out_end;
558 return ide_stopped;
559 }
560 }
561
562 /* using dma, transfer is complete now */
563 if (dma) {
564 if (dma_error)
565 return ide_error(drive, "dma error", stat);
566 uptodate = 1;
567 goto out_end;
568 }
569
570 ide_read_bcount_and_ireason(drive, &len, &ireason);
571
572 thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
573 if (thislen > len)
574 thislen = len;
575
576 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
577 stat, thislen);
578
579 /* If DRQ is clear, the command has completed. */
580 if ((stat & ATA_DRQ) == 0) {
581 if (rq->cmd_type == REQ_TYPE_FS) {
582 /*
583 * If we're not done reading/writing, complain.
584 * Otherwise, complete the command normally.
585 */
586 uptodate = 1;
587 if (cmd->nleft > 0) {
588 printk(KERN_ERR PFX "%s: %s: data underrun "
589 "(%u bytes)\n", drive->name, __func__,
590 cmd->nleft);
591 if (!write)
592 rq->cmd_flags |= REQ_FAILED;
593 uptodate = 0;
594 }
595 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
596 ide_cd_request_sense_fixup(drive, cmd);
597
598 uptodate = cmd->nleft ? 0 : 1;
599
600 /*
601 * suck out the remaining bytes from the drive in an
602 * attempt to complete the data xfer. (see BZ#13399)
603 */
604 if (!(stat & ATA_ERR) && !uptodate && thislen) {
605 ide_pio_bytes(drive, cmd, write, thislen);
606 uptodate = cmd->nleft ? 0 : 1;
607 }
608
609 if (!uptodate)
610 rq->cmd_flags |= REQ_FAILED;
611 }
612 goto out_end;
613 }
614
615 rc = ide_check_ireason(drive, rq, len, ireason, write);
616 if (rc)
617 goto out_end;
618
619 cmd->last_xfer_len = 0;
620
621 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
622 "ireason: 0x%x",
623 rq->cmd_type, ireason);
624
625 /* transfer data */
626 while (thislen > 0) {
627 int blen = min_t(int, thislen, cmd->nleft);
628
629 if (cmd->nleft == 0)
630 break;
631
632 ide_pio_bytes(drive, cmd, write, blen);
633 cmd->last_xfer_len += blen;
634
635 thislen -= blen;
636 len -= blen;
637
638 if (sense && write == 0)
639 rq->sense_len += blen;
640 }
641
642 /* pad, if necessary */
643 if (len > 0) {
644 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
645 ide_pad_transfer(drive, write, len);
646 else {
647 printk(KERN_ERR PFX "%s: confused, missing data\n",
648 drive->name);
649 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
650 }
651 }
652
653 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
654 timeout = rq->timeout;
655 } else {
656 timeout = ATAPI_WAIT_PC;
657 if (rq->cmd_type != REQ_TYPE_FS)
658 expiry = ide_cd_expiry;
659 }
660
661 hwif->expiry = expiry;
662 ide_set_handler(drive, cdrom_newpc_intr, timeout);
663 return ide_started;
664
665 out_end:
666 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
667 rq->resid_len = 0;
668 blk_end_request_all(rq, 0);
669 hwif->rq = NULL;
670 } else {
671 if (sense && uptodate)
672 ide_cd_complete_failed_rq(drive, rq);
673
674 if (rq->cmd_type == REQ_TYPE_FS) {
675 if (cmd->nleft == 0)
676 uptodate = 1;
677 } else {
678 if (uptodate <= 0 && rq->errors == 0)
679 rq->errors = -EIO;
680 }
681
682 if (uptodate == 0 && rq->bio)
683 if (ide_cd_error_cmd(drive, cmd))
684 return ide_stopped;
685
686 /* make sure it's fully ended */
687 if (rq->cmd_type != REQ_TYPE_FS) {
688 rq->resid_len -= cmd->nbytes - cmd->nleft;
689 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
690 rq->resid_len += cmd->last_xfer_len;
691 }
692
693 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
694
695 if (sense && rc == 2)
696 ide_error(drive, "request sense failure", stat);
697 }
698 return ide_stopped;
699 }
700
701 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
702 {
703 struct cdrom_info *cd = drive->driver_data;
704 struct request_queue *q = drive->queue;
705 int write = rq_data_dir(rq) == WRITE;
706 unsigned short sectors_per_frame =
707 queue_logical_block_size(q) >> SECTOR_BITS;
708
709 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
710 "secs_per_frame: %u",
711 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
712
713 if (write) {
714 /* disk has become write protected */
715 if (get_disk_ro(cd->disk))
716 return ide_stopped;
717 } else {
718 /*
719 * We may be retrying this request after an error. Fix up any
720 * weirdness which might be present in the request packet.
721 */
722 q->prep_rq_fn(q, rq);
723 }
724
725 /* fs requests *must* be hardware frame aligned */
726 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
727 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
728 return ide_stopped;
729
730 /* use DMA, if possible */
731 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
732
733 if (write)
734 cd->devinfo.media_written = 1;
735
736 rq->timeout = ATAPI_WAIT_PC;
737
738 return ide_started;
739 }
740
741 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
742 {
743
744 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
745 rq->cmd[0], rq->cmd_type);
746
747 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
748 rq->cmd_flags |= REQ_QUIET;
749 else
750 rq->cmd_flags &= ~REQ_FAILED;
751
752 drive->dma = 0;
753
754 /* sg request */
755 if (rq->bio) {
756 struct request_queue *q = drive->queue;
757 char *buf = bio_data(rq->bio);
758 unsigned int alignment;
759
760 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
761
762 /*
763 * check if dma is safe
764 *
765 * NOTE! The "len" and "addr" checks should possibly have
766 * separate masks.
767 */
768 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
769 if ((unsigned long)buf & alignment
770 || blk_rq_bytes(rq) & q->dma_pad_mask
771 || object_is_on_stack(buf))
772 drive->dma = 0;
773 }
774 }
775
776 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
777 sector_t block)
778 {
779 struct ide_cmd cmd;
780 int uptodate = 0;
781 unsigned int nsectors;
782
783 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
784 rq->cmd[0], (unsigned long long)block);
785
786 if (drive->debug_mask & IDE_DBG_RQ)
787 blk_dump_rq_flags(rq, "ide_cd_do_request");
788
789 switch (rq->cmd_type) {
790 case REQ_TYPE_FS:
791 if (cdrom_start_rw(drive, rq) == ide_stopped)
792 goto out_end;
793 break;
794 case REQ_TYPE_SENSE:
795 case REQ_TYPE_BLOCK_PC:
796 case REQ_TYPE_ATA_PC:
797 if (!rq->timeout)
798 rq->timeout = ATAPI_WAIT_PC;
799
800 cdrom_do_block_pc(drive, rq);
801 break;
802 case REQ_TYPE_SPECIAL:
803 /* right now this can only be a reset... */
804 uptodate = 1;
805 goto out_end;
806 default:
807 BUG();
808 }
809
810 /* prepare sense request for this command */
811 ide_prep_sense(drive, rq);
812
813 memset(&cmd, 0, sizeof(cmd));
814
815 if (rq_data_dir(rq))
816 cmd.tf_flags |= IDE_TFLAG_WRITE;
817
818 cmd.rq = rq;
819
820 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
821 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
822 ide_map_sg(drive, &cmd);
823 }
824
825 return ide_issue_pc(drive, &cmd);
826 out_end:
827 nsectors = blk_rq_sectors(rq);
828
829 if (nsectors == 0)
830 nsectors = 1;
831
832 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
833
834 return ide_stopped;
835 }
836
837 /*
838 * Ioctl handling.
839 *
840 * Routines which queue packet commands take as a final argument a pointer to a
841 * request_sense struct. If execution of the command results in an error with a
842 * CHECK CONDITION status, this structure will be filled with the results of the
843 * subsequent request sense command. The pointer can also be NULL, in which case
844 * no sense information is returned.
845 */
846 static void msf_from_bcd(struct atapi_msf *msf)
847 {
848 msf->minute = bcd2bin(msf->minute);
849 msf->second = bcd2bin(msf->second);
850 msf->frame = bcd2bin(msf->frame);
851 }
852
853 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
854 {
855 struct cdrom_info *info = drive->driver_data;
856 struct cdrom_device_info *cdi = &info->devinfo;
857 unsigned char cmd[BLK_MAX_CDB];
858
859 ide_debug_log(IDE_DBG_FUNC, "enter");
860
861 memset(cmd, 0, BLK_MAX_CDB);
862 cmd[0] = GPCMD_TEST_UNIT_READY;
863
864 /*
865 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
866 * instead of supporting the LOAD_UNLOAD opcode.
867 */
868 cmd[7] = cdi->sanyo_slot % 3;
869
870 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
871 }
872
873 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
874 unsigned long *sectors_per_frame,
875 struct request_sense *sense)
876 {
877 struct {
878 __be32 lba;
879 __be32 blocklen;
880 } capbuf;
881
882 int stat;
883 unsigned char cmd[BLK_MAX_CDB];
884 unsigned len = sizeof(capbuf);
885 u32 blocklen;
886
887 ide_debug_log(IDE_DBG_FUNC, "enter");
888
889 memset(cmd, 0, BLK_MAX_CDB);
890 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
891
892 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
893 REQ_QUIET);
894 if (stat)
895 return stat;
896
897 /*
898 * Sanity check the given block size, in so far as making
899 * sure the sectors_per_frame we give to the caller won't
900 * end up being bogus.
901 */
902 blocklen = be32_to_cpu(capbuf.blocklen);
903 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
904 switch (blocklen) {
905 case 512:
906 case 1024:
907 case 2048:
908 case 4096:
909 break;
910 default:
911 printk_once(KERN_ERR PFX "%s: weird block size %u; "
912 "setting default block size to 2048\n",
913 drive->name, blocklen);
914 blocklen = 2048;
915 break;
916 }
917
918 *capacity = 1 + be32_to_cpu(capbuf.lba);
919 *sectors_per_frame = blocklen >> SECTOR_BITS;
920
921 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
922 *capacity, *sectors_per_frame);
923
924 return 0;
925 }
926
927 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
928 int format, char *buf, int buflen,
929 struct request_sense *sense)
930 {
931 unsigned char cmd[BLK_MAX_CDB];
932
933 ide_debug_log(IDE_DBG_FUNC, "enter");
934
935 memset(cmd, 0, BLK_MAX_CDB);
936
937 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
938 cmd[6] = trackno;
939 cmd[7] = (buflen >> 8);
940 cmd[8] = (buflen & 0xff);
941 cmd[9] = (format << 6);
942
943 if (msf_flag)
944 cmd[1] = 2;
945
946 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
947 }
948
949 /* Try to read the entire TOC for the disk into our internal buffer. */
950 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
951 {
952 int stat, ntracks, i;
953 struct cdrom_info *info = drive->driver_data;
954 struct cdrom_device_info *cdi = &info->devinfo;
955 struct atapi_toc *toc = info->toc;
956 struct {
957 struct atapi_toc_header hdr;
958 struct atapi_toc_entry ent;
959 } ms_tmp;
960 long last_written;
961 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
962
963 ide_debug_log(IDE_DBG_FUNC, "enter");
964
965 if (toc == NULL) {
966 /* try to allocate space */
967 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
968 if (toc == NULL) {
969 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
970 drive->name);
971 return -ENOMEM;
972 }
973 info->toc = toc;
974 }
975
976 /*
977 * Check to see if the existing data is still valid. If it is,
978 * just return.
979 */
980 (void) cdrom_check_status(drive, sense);
981
982 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
983 return 0;
984
985 /* try to get the total cdrom capacity and sector size */
986 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
987 sense);
988 if (stat)
989 toc->capacity = 0x1fffff;
990
991 set_capacity(info->disk, toc->capacity * sectors_per_frame);
992 /* save a private copy of the TOC capacity for error handling */
993 drive->probed_capacity = toc->capacity * sectors_per_frame;
994
995 blk_queue_logical_block_size(drive->queue,
996 sectors_per_frame << SECTOR_BITS);
997
998 /* first read just the header, so we know how long the TOC is */
999 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1000 sizeof(struct atapi_toc_header), sense);
1001 if (stat)
1002 return stat;
1003
1004 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1005 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1006 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1007 }
1008
1009 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1010 if (ntracks <= 0)
1011 return -EIO;
1012 if (ntracks > MAX_TRACKS)
1013 ntracks = MAX_TRACKS;
1014
1015 /* now read the whole schmeer */
1016 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1017 (char *)&toc->hdr,
1018 sizeof(struct atapi_toc_header) +
1019 (ntracks + 1) *
1020 sizeof(struct atapi_toc_entry), sense);
1021
1022 if (stat && toc->hdr.first_track > 1) {
1023 /*
1024 * Cds with CDI tracks only don't have any TOC entries, despite
1025 * of this the returned values are
1026 * first_track == last_track = number of CDI tracks + 1,
1027 * so that this case is indistinguishable from the same layout
1028 * plus an additional audio track. If we get an error for the
1029 * regular case, we assume a CDI without additional audio
1030 * tracks. In this case the readable TOC is empty (CDI tracks
1031 * are not included) and only holds the Leadout entry.
1032 *
1033 * Heiko Eißfeldt.
1034 */
1035 ntracks = 0;
1036 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1037 (char *)&toc->hdr,
1038 sizeof(struct atapi_toc_header) +
1039 (ntracks + 1) *
1040 sizeof(struct atapi_toc_entry),
1041 sense);
1042 if (stat)
1043 return stat;
1044
1045 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1046 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1047 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1048 } else {
1049 toc->hdr.first_track = CDROM_LEADOUT;
1050 toc->hdr.last_track = CDROM_LEADOUT;
1051 }
1052 }
1053
1054 if (stat)
1055 return stat;
1056
1057 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1058
1059 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1061 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1062 }
1063
1064 for (i = 0; i <= ntracks; i++) {
1065 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1066 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1067 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1068 msf_from_bcd(&toc->ent[i].addr.msf);
1069 }
1070 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1071 toc->ent[i].addr.msf.second,
1072 toc->ent[i].addr.msf.frame);
1073 }
1074
1075 if (toc->hdr.first_track != CDROM_LEADOUT) {
1076 /* read the multisession information */
1077 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1078 sizeof(ms_tmp), sense);
1079 if (stat)
1080 return stat;
1081
1082 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1083 } else {
1084 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1085 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1086 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1087 }
1088
1089 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1090 /* re-read multisession information using MSF format */
1091 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1092 sizeof(ms_tmp), sense);
1093 if (stat)
1094 return stat;
1095
1096 msf_from_bcd(&ms_tmp.ent.addr.msf);
1097 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1098 ms_tmp.ent.addr.msf.second,
1099 ms_tmp.ent.addr.msf.frame);
1100 }
1101
1102 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1103
1104 /* now try to get the total cdrom capacity */
1105 stat = cdrom_get_last_written(cdi, &last_written);
1106 if (!stat && (last_written > toc->capacity)) {
1107 toc->capacity = last_written;
1108 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1109 drive->probed_capacity = toc->capacity * sectors_per_frame;
1110 }
1111
1112 /* Remember that we've read this stuff. */
1113 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1114
1115 return 0;
1116 }
1117
1118 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1119 {
1120 struct cdrom_info *info = drive->driver_data;
1121 struct cdrom_device_info *cdi = &info->devinfo;
1122 struct packet_command cgc;
1123 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1124
1125 ide_debug_log(IDE_DBG_FUNC, "enter");
1126
1127 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1128 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1129
1130 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1131 do {
1132 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1133 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1134 if (!stat)
1135 break;
1136 } while (--attempts);
1137 return stat;
1138 }
1139
1140 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1141 {
1142 struct cdrom_info *cd = drive->driver_data;
1143 u16 curspeed, maxspeed;
1144
1145 ide_debug_log(IDE_DBG_FUNC, "enter");
1146
1147 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1148 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1149 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1150 } else {
1151 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1152 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1153 }
1154
1155 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1156 curspeed, maxspeed);
1157
1158 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1159 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1160 }
1161
1162 #define IDE_CD_CAPABILITIES \
1163 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1164 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1165 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1166 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1167 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1168
1169 static struct cdrom_device_ops ide_cdrom_dops = {
1170 .open = ide_cdrom_open_real,
1171 .release = ide_cdrom_release_real,
1172 .drive_status = ide_cdrom_drive_status,
1173 .check_events = ide_cdrom_check_events_real,
1174 .tray_move = ide_cdrom_tray_move,
1175 .lock_door = ide_cdrom_lock_door,
1176 .select_speed = ide_cdrom_select_speed,
1177 .get_last_session = ide_cdrom_get_last_session,
1178 .get_mcn = ide_cdrom_get_mcn,
1179 .reset = ide_cdrom_reset,
1180 .audio_ioctl = ide_cdrom_audio_ioctl,
1181 .capability = IDE_CD_CAPABILITIES,
1182 .generic_packet = ide_cdrom_packet,
1183 };
1184
1185 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1186 {
1187 struct cdrom_info *info = drive->driver_data;
1188 struct cdrom_device_info *devinfo = &info->devinfo;
1189
1190 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1191
1192 devinfo->ops = &ide_cdrom_dops;
1193 devinfo->speed = info->current_speed;
1194 devinfo->capacity = nslots;
1195 devinfo->handle = drive;
1196 strcpy(devinfo->name, drive->name);
1197
1198 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1199 devinfo->mask |= CDC_SELECT_SPEED;
1200
1201 devinfo->disk = info->disk;
1202 return register_cdrom(devinfo);
1203 }
1204
1205 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1206 {
1207 struct cdrom_info *cd = drive->driver_data;
1208 struct cdrom_device_info *cdi = &cd->devinfo;
1209 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1210 mechtype_t mechtype;
1211 int nslots = 1;
1212
1213 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1214 drive->media, drive->atapi_flags);
1215
1216 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1217 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1218 CDC_MO_DRIVE | CDC_RAM);
1219
1220 if (drive->media == ide_optical) {
1221 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1222 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1223 drive->name);
1224 return nslots;
1225 }
1226
1227 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1228 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1229 cdi->mask &= ~CDC_PLAY_AUDIO;
1230 return nslots;
1231 }
1232
1233 /*
1234 * We have to cheat a little here. the packet will eventually be queued
1235 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1236 * Since this device hasn't been registered with the Uniform layer yet,
1237 * it can't do this. Same goes for cdi->ops.
1238 */
1239 cdi->handle = drive;
1240 cdi->ops = &ide_cdrom_dops;
1241
1242 if (ide_cdrom_get_capabilities(drive, buf))
1243 return 0;
1244
1245 if ((buf[8 + 6] & 0x01) == 0)
1246 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1247 if (buf[8 + 6] & 0x08)
1248 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1249 if (buf[8 + 3] & 0x01)
1250 cdi->mask &= ~CDC_CD_R;
1251 if (buf[8 + 3] & 0x02)
1252 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1253 if (buf[8 + 2] & 0x38)
1254 cdi->mask &= ~CDC_DVD;
1255 if (buf[8 + 3] & 0x20)
1256 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1257 if (buf[8 + 3] & 0x10)
1258 cdi->mask &= ~CDC_DVD_R;
1259 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1260 cdi->mask &= ~CDC_PLAY_AUDIO;
1261
1262 mechtype = buf[8 + 6] >> 5;
1263 if (mechtype == mechtype_caddy ||
1264 mechtype == mechtype_popup ||
1265 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1266 cdi->mask |= CDC_CLOSE_TRAY;
1267
1268 if (cdi->sanyo_slot > 0) {
1269 cdi->mask &= ~CDC_SELECT_DISC;
1270 nslots = 3;
1271 } else if (mechtype == mechtype_individual_changer ||
1272 mechtype == mechtype_cartridge_changer) {
1273 nslots = cdrom_number_of_slots(cdi);
1274 if (nslots > 1)
1275 cdi->mask &= ~CDC_SELECT_DISC;
1276 }
1277
1278 ide_cdrom_update_speed(drive, buf);
1279
1280 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1281
1282 /* don't print speed if the drive reported 0 */
1283 if (cd->max_speed)
1284 printk(KERN_CONT " %dX", cd->max_speed);
1285
1286 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1287
1288 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1289 printk(KERN_CONT " DVD%s%s",
1290 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1291 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1292
1293 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1294 printk(KERN_CONT " CD%s%s",
1295 (cdi->mask & CDC_CD_R) ? "" : "-R",
1296 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1297
1298 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1299 printk(KERN_CONT " changer w/%d slots", nslots);
1300 else
1301 printk(KERN_CONT " drive");
1302
1303 printk(KERN_CONT ", %dkB Cache\n",
1304 be16_to_cpup((__be16 *)&buf[8 + 12]));
1305
1306 return nslots;
1307 }
1308
1309 /* standard prep_rq_fn that builds 10 byte cmds */
1310 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1311 {
1312 int hard_sect = queue_logical_block_size(q);
1313 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1314 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1315
1316 memset(rq->cmd, 0, BLK_MAX_CDB);
1317
1318 if (rq_data_dir(rq) == READ)
1319 rq->cmd[0] = GPCMD_READ_10;
1320 else
1321 rq->cmd[0] = GPCMD_WRITE_10;
1322
1323 /*
1324 * fill in lba
1325 */
1326 rq->cmd[2] = (block >> 24) & 0xff;
1327 rq->cmd[3] = (block >> 16) & 0xff;
1328 rq->cmd[4] = (block >> 8) & 0xff;
1329 rq->cmd[5] = block & 0xff;
1330
1331 /*
1332 * and transfer length
1333 */
1334 rq->cmd[7] = (blocks >> 8) & 0xff;
1335 rq->cmd[8] = blocks & 0xff;
1336 rq->cmd_len = 10;
1337 return BLKPREP_OK;
1338 }
1339
1340 /*
1341 * Most of the SCSI commands are supported directly by ATAPI devices.
1342 * This transform handles the few exceptions.
1343 */
1344 static int ide_cdrom_prep_pc(struct request *rq)
1345 {
1346 u8 *c = rq->cmd;
1347
1348 /* transform 6-byte read/write commands to the 10-byte version */
1349 if (c[0] == READ_6 || c[0] == WRITE_6) {
1350 c[8] = c[4];
1351 c[5] = c[3];
1352 c[4] = c[2];
1353 c[3] = c[1] & 0x1f;
1354 c[2] = 0;
1355 c[1] &= 0xe0;
1356 c[0] += (READ_10 - READ_6);
1357 rq->cmd_len = 10;
1358 return BLKPREP_OK;
1359 }
1360
1361 /*
1362 * it's silly to pretend we understand 6-byte sense commands, just
1363 * reject with ILLEGAL_REQUEST and the caller should take the
1364 * appropriate action
1365 */
1366 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1367 rq->errors = ILLEGAL_REQUEST;
1368 return BLKPREP_KILL;
1369 }
1370
1371 return BLKPREP_OK;
1372 }
1373
1374 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1375 {
1376 if (rq->cmd_type == REQ_TYPE_FS)
1377 return ide_cdrom_prep_fs(q, rq);
1378 else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1379 return ide_cdrom_prep_pc(rq);
1380
1381 return 0;
1382 }
1383
1384 struct cd_list_entry {
1385 const char *id_model;
1386 const char *id_firmware;
1387 unsigned int cd_flags;
1388 };
1389
1390 #ifdef CONFIG_IDE_PROC_FS
1391 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1392 {
1393 unsigned long capacity, sectors_per_frame;
1394
1395 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1396 return 0;
1397
1398 return capacity * sectors_per_frame;
1399 }
1400
1401 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1402 {
1403 ide_drive_t *drive = m->private;
1404
1405 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1406 return 0;
1407 }
1408
1409 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1410 {
1411 return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1412 }
1413
1414 static const struct file_operations idecd_capacity_proc_fops = {
1415 .owner = THIS_MODULE,
1416 .open = idecd_capacity_proc_open,
1417 .read = seq_read,
1418 .llseek = seq_lseek,
1419 .release = single_release,
1420 };
1421
1422 static ide_proc_entry_t idecd_proc[] = {
1423 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1424 {}
1425 };
1426
1427 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1428 {
1429 return idecd_proc;
1430 }
1431
1432 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1433 {
1434 return NULL;
1435 }
1436 #endif
1437
1438 static const struct cd_list_entry ide_cd_quirks_list[] = {
1439 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1440 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1441 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1442 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1443 IDE_AFLAG_PRE_ATAPI12, },
1444 /* Vertos 300, some versions of this drive like to talk BCD. */
1445 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1446 /* Vertos 600 ESD. */
1447 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1448 /*
1449 * Sanyo 3 CD changer uses a non-standard command for CD changing
1450 * (by default standard ATAPI support for CD changers is used).
1451 */
1452 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1453 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1454 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1455 /* Stingray 8X CD-ROM. */
1456 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1457 /*
1458 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1459 * mode sense page capabilities size, but older drives break.
1460 */
1461 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1462 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1463 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1464 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1465 /*
1466 * Some drives used by Apple don't advertise audio play
1467 * but they do support reading TOC & audio datas.
1468 */
1469 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1470 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1471 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1472 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1473 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1474 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1475 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1476 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1477 { NULL, NULL, 0 }
1478 };
1479
1480 static unsigned int ide_cd_flags(u16 *id)
1481 {
1482 const struct cd_list_entry *cle = ide_cd_quirks_list;
1483
1484 while (cle->id_model) {
1485 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1486 (cle->id_firmware == NULL ||
1487 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1488 return cle->cd_flags;
1489 cle++;
1490 }
1491
1492 return 0;
1493 }
1494
1495 static int ide_cdrom_setup(ide_drive_t *drive)
1496 {
1497 struct cdrom_info *cd = drive->driver_data;
1498 struct cdrom_device_info *cdi = &cd->devinfo;
1499 struct request_queue *q = drive->queue;
1500 u16 *id = drive->id;
1501 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1502 int nslots;
1503
1504 ide_debug_log(IDE_DBG_PROBE, "enter");
1505
1506 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1507 blk_queue_dma_alignment(q, 31);
1508 blk_queue_update_dma_pad(q, 15);
1509
1510 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1511 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1512
1513 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1514 fw_rev[4] == '1' && fw_rev[6] <= '2')
1515 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1516 IDE_AFLAG_TOCADDR_AS_BCD);
1517 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1518 fw_rev[4] == '1' && fw_rev[6] <= '2')
1519 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1520 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1521 /* 3 => use CD in slot 0 */
1522 cdi->sanyo_slot = 3;
1523
1524 nslots = ide_cdrom_probe_capabilities(drive);
1525
1526 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1527
1528 if (ide_cdrom_register(drive, nslots)) {
1529 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1530 " cdrom driver.\n", drive->name, __func__);
1531 cd->devinfo.handle = NULL;
1532 return 1;
1533 }
1534
1535 ide_proc_register_driver(drive, cd->driver);
1536 return 0;
1537 }
1538
1539 static void ide_cd_remove(ide_drive_t *drive)
1540 {
1541 struct cdrom_info *info = drive->driver_data;
1542
1543 ide_debug_log(IDE_DBG_FUNC, "enter");
1544
1545 ide_proc_unregister_driver(drive, info->driver);
1546 device_del(&info->dev);
1547 del_gendisk(info->disk);
1548
1549 mutex_lock(&idecd_ref_mutex);
1550 put_device(&info->dev);
1551 mutex_unlock(&idecd_ref_mutex);
1552 }
1553
1554 static void ide_cd_release(struct device *dev)
1555 {
1556 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1557 struct cdrom_device_info *devinfo = &info->devinfo;
1558 ide_drive_t *drive = info->drive;
1559 struct gendisk *g = info->disk;
1560
1561 ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563 kfree(info->toc);
1564 if (devinfo->handle == drive)
1565 unregister_cdrom(devinfo);
1566 drive->driver_data = NULL;
1567 blk_queue_prep_rq(drive->queue, NULL);
1568 g->private_data = NULL;
1569 put_disk(g);
1570 kfree(info);
1571 }
1572
1573 static int ide_cd_probe(ide_drive_t *);
1574
1575 static struct ide_driver ide_cdrom_driver = {
1576 .gen_driver = {
1577 .owner = THIS_MODULE,
1578 .name = "ide-cdrom",
1579 .bus = &ide_bus_type,
1580 },
1581 .probe = ide_cd_probe,
1582 .remove = ide_cd_remove,
1583 .version = IDECD_VERSION,
1584 .do_request = ide_cd_do_request,
1585 #ifdef CONFIG_IDE_PROC_FS
1586 .proc_entries = ide_cd_proc_entries,
1587 .proc_devsets = ide_cd_proc_devsets,
1588 #endif
1589 };
1590
1591 static int idecd_open(struct block_device *bdev, fmode_t mode)
1592 {
1593 struct cdrom_info *info;
1594 int rc = -ENXIO;
1595
1596 mutex_lock(&ide_cd_mutex);
1597 info = ide_cd_get(bdev->bd_disk);
1598 if (!info)
1599 goto out;
1600
1601 rc = cdrom_open(&info->devinfo, bdev, mode);
1602 if (rc < 0)
1603 ide_cd_put(info);
1604 out:
1605 mutex_unlock(&ide_cd_mutex);
1606 return rc;
1607 }
1608
1609 static int idecd_release(struct gendisk *disk, fmode_t mode)
1610 {
1611 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1612
1613 mutex_lock(&ide_cd_mutex);
1614 cdrom_release(&info->devinfo, mode);
1615
1616 ide_cd_put(info);
1617 mutex_unlock(&ide_cd_mutex);
1618
1619 return 0;
1620 }
1621
1622 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1623 {
1624 struct packet_command cgc;
1625 char buffer[16];
1626 int stat;
1627 char spindown;
1628
1629 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1630 return -EFAULT;
1631
1632 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1633
1634 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1635 if (stat)
1636 return stat;
1637
1638 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1639 return cdrom_mode_select(cdi, &cgc);
1640 }
1641
1642 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1643 {
1644 struct packet_command cgc;
1645 char buffer[16];
1646 int stat;
1647 char spindown;
1648
1649 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1650
1651 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1652 if (stat)
1653 return stat;
1654
1655 spindown = buffer[11] & 0x0f;
1656 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1657 return -EFAULT;
1658 return 0;
1659 }
1660
1661 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1662 unsigned int cmd, unsigned long arg)
1663 {
1664 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1665 int err;
1666
1667 switch (cmd) {
1668 case CDROMSETSPINDOWN:
1669 return idecd_set_spindown(&info->devinfo, arg);
1670 case CDROMGETSPINDOWN:
1671 return idecd_get_spindown(&info->devinfo, arg);
1672 default:
1673 break;
1674 }
1675
1676 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1677 if (err == -EINVAL)
1678 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1679
1680 return err;
1681 }
1682
1683 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1684 unsigned int cmd, unsigned long arg)
1685 {
1686 int ret;
1687
1688 mutex_lock(&ide_cd_mutex);
1689 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1690 mutex_unlock(&ide_cd_mutex);
1691
1692 return ret;
1693 }
1694
1695
1696 static unsigned int idecd_check_events(struct gendisk *disk,
1697 unsigned int clearing)
1698 {
1699 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1700 return cdrom_check_events(&info->devinfo, clearing);
1701 }
1702
1703 static int idecd_revalidate_disk(struct gendisk *disk)
1704 {
1705 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1706 struct request_sense sense;
1707
1708 ide_cd_read_toc(info->drive, &sense);
1709
1710 return 0;
1711 }
1712
1713 static const struct block_device_operations idecd_ops = {
1714 .owner = THIS_MODULE,
1715 .open = idecd_open,
1716 .release = idecd_release,
1717 .ioctl = idecd_ioctl,
1718 .check_events = idecd_check_events,
1719 .revalidate_disk = idecd_revalidate_disk
1720 };
1721
1722 /* module options */
1723 static unsigned long debug_mask;
1724 module_param(debug_mask, ulong, 0644);
1725
1726 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1727
1728 static int ide_cd_probe(ide_drive_t *drive)
1729 {
1730 struct cdrom_info *info;
1731 struct gendisk *g;
1732 struct request_sense sense;
1733
1734 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1735 drive->driver_req, drive->media);
1736
1737 if (!strstr("ide-cdrom", drive->driver_req))
1738 goto failed;
1739
1740 if (drive->media != ide_cdrom && drive->media != ide_optical)
1741 goto failed;
1742
1743 drive->debug_mask = debug_mask;
1744 drive->irq_handler = cdrom_newpc_intr;
1745
1746 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1747 if (info == NULL) {
1748 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1749 drive->name);
1750 goto failed;
1751 }
1752
1753 g = alloc_disk(1 << PARTN_BITS);
1754 if (!g)
1755 goto out_free_cd;
1756
1757 ide_init_disk(g, drive);
1758
1759 info->dev.parent = &drive->gendev;
1760 info->dev.release = ide_cd_release;
1761 dev_set_name(&info->dev, dev_name(&drive->gendev));
1762
1763 if (device_register(&info->dev))
1764 goto out_free_disk;
1765
1766 info->drive = drive;
1767 info->driver = &ide_cdrom_driver;
1768 info->disk = g;
1769
1770 g->private_data = &info->driver;
1771
1772 drive->driver_data = info;
1773
1774 g->minors = 1;
1775 g->driverfs_dev = &drive->gendev;
1776 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1777 if (ide_cdrom_setup(drive)) {
1778 put_device(&info->dev);
1779 goto failed;
1780 }
1781
1782 ide_cd_read_toc(drive, &sense);
1783 g->fops = &idecd_ops;
1784 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1785 add_disk(g);
1786 return 0;
1787
1788 out_free_disk:
1789 put_disk(g);
1790 out_free_cd:
1791 kfree(info);
1792 failed:
1793 return -ENODEV;
1794 }
1795
1796 static void __exit ide_cdrom_exit(void)
1797 {
1798 driver_unregister(&ide_cdrom_driver.gen_driver);
1799 }
1800
1801 static int __init ide_cdrom_init(void)
1802 {
1803 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1804 return driver_register(&ide_cdrom_driver.gen_driver);
1805 }
1806
1807 MODULE_ALIAS("ide:*m-cdrom*");
1808 MODULE_ALIAS("ide-cd");
1809 module_init(ide_cdrom_init);
1810 module_exit(ide_cdrom_exit);
1811 MODULE_LICENSE("GPL");