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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into...
[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, 2007-2009 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/sched/task_stack.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/seq_file.h>
35 #include <linux/slab.h>
36 #include <linux/interrupt.h>
37 #include <linux/errno.h>
38 #include <linux/cdrom.h>
39 #include <linux/ide.h>
40 #include <linux/completion.h>
41 #include <linux/mutex.h>
42 #include <linux/bcd.h>
43
44 /* For SCSI -> ATAPI command conversion */
45 #include <scsi/scsi.h>
46
47 #include <linux/io.h>
48 #include <asm/byteorder.h>
49 #include <linux/uaccess.h>
50 #include <asm/unaligned.h>
51
52 #include "ide-cd.h"
53
54 static DEFINE_MUTEX(ide_cd_mutex);
55 static DEFINE_MUTEX(idecd_ref_mutex);
56
57 static void ide_cd_release(struct device *);
58
59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
60 {
61 struct cdrom_info *cd = NULL;
62
63 mutex_lock(&idecd_ref_mutex);
64 cd = ide_drv_g(disk, cdrom_info);
65 if (cd) {
66 if (ide_device_get(cd->drive))
67 cd = NULL;
68 else
69 get_device(&cd->dev);
70
71 }
72 mutex_unlock(&idecd_ref_mutex);
73 return cd;
74 }
75
76 static void ide_cd_put(struct cdrom_info *cd)
77 {
78 ide_drive_t *drive = cd->drive;
79
80 mutex_lock(&idecd_ref_mutex);
81 put_device(&cd->dev);
82 ide_device_put(drive);
83 mutex_unlock(&idecd_ref_mutex);
84 }
85
86 /*
87 * Generic packet command support and error handling routines.
88 */
89
90 /* Mark that we've seen a media change and invalidate our internal buffers. */
91 static void cdrom_saw_media_change(ide_drive_t *drive)
92 {
93 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
94 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
95 }
96
97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
98 {
99 struct request_sense *sense = &drive->sense_data;
100 int log = 0;
101
102 if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
103 return 0;
104
105 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
106
107 switch (sense->sense_key) {
108 case NO_SENSE:
109 case RECOVERED_ERROR:
110 break;
111 case NOT_READY:
112 /*
113 * don't care about tray state messages for e.g. capacity
114 * commands or in-progress or becoming ready
115 */
116 if (sense->asc == 0x3a || sense->asc == 0x04)
117 break;
118 log = 1;
119 break;
120 case ILLEGAL_REQUEST:
121 /*
122 * don't log START_STOP unit with LoEj set, since we cannot
123 * reliably check if drive can auto-close
124 */
125 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126 break;
127 log = 1;
128 break;
129 case UNIT_ATTENTION:
130 /*
131 * Make good and sure we've seen this potential media change.
132 * Some drives (i.e. Creative) fail to present the correct sense
133 * key in the error register.
134 */
135 cdrom_saw_media_change(drive);
136 break;
137 default:
138 log = 1;
139 break;
140 }
141 return log;
142 }
143
144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
145 struct request *failed_command)
146 {
147 struct request_sense *sense = &drive->sense_data;
148 struct cdrom_info *info = drive->driver_data;
149 unsigned long sector;
150 unsigned long bio_sectors;
151
152 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
153 sense->error_code, sense->sense_key);
154
155 if (failed_command)
156 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
157 failed_command->cmd[0]);
158
159 if (!cdrom_log_sense(drive, failed_command))
160 return;
161
162 /*
163 * If a read toc is executed for a CD-R or CD-RW medium where the first
164 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
165 * confusing error)
166 */
167 if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168 if (sense->sense_key == 0x05 && sense->asc == 0x24)
169 return;
170
171 /* current error */
172 if (sense->error_code == 0x70) {
173 switch (sense->sense_key) {
174 case MEDIUM_ERROR:
175 case VOLUME_OVERFLOW:
176 case ILLEGAL_REQUEST:
177 if (!sense->valid)
178 break;
179 if (failed_command == NULL ||
180 blk_rq_is_passthrough(failed_command))
181 break;
182 sector = (sense->information[0] << 24) |
183 (sense->information[1] << 16) |
184 (sense->information[2] << 8) |
185 (sense->information[3]);
186
187 if (queue_logical_block_size(drive->queue) == 2048)
188 /* device sector size is 2K */
189 sector <<= 2;
190
191 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
192 sector &= ~(bio_sectors - 1);
193
194 /*
195 * The SCSI specification allows for the value
196 * returned by READ CAPACITY to be up to 75 2K
197 * sectors past the last readable block.
198 * Therefore, if we hit a medium error within the
199 * last 75 2K sectors, we decrease the saved size
200 * value.
201 */
202 if (sector < get_capacity(info->disk) &&
203 drive->probed_capacity - sector < 4 * 75)
204 set_capacity(info->disk, sector);
205 }
206 }
207
208 ide_cd_log_error(drive->name, failed_command, sense);
209 }
210
211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
212 {
213 /*
214 * For ATA_PRIV_SENSE, "rq->special" points to the original
215 * failed request. Also, the sense data should be read
216 * directly from rq which might be different from the original
217 * sense buffer if it got copied during mapping.
218 */
219 struct request *failed = (struct request *)rq->special;
220 void *sense = bio_data(rq->bio);
221
222 if (failed) {
223 /*
224 * Sense is always read into drive->sense_data, copy back to the
225 * original request.
226 */
227 memcpy(scsi_req(failed)->sense, sense, 18);
228 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
229 cdrom_analyze_sense_data(drive, failed);
230
231 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
232 BUG();
233 } else
234 cdrom_analyze_sense_data(drive, NULL);
235 }
236
237
238 /*
239 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
240 * while flushing data from cache.
241 *
242 * returns: 0 failed (write timeout expired)
243 * 1 success
244 */
245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
246 {
247
248 struct cdrom_info *info = drive->driver_data;
249
250 if (!rq->errors)
251 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
252
253 rq->errors = 1;
254
255 if (time_after(jiffies, info->write_timeout))
256 return 0;
257 else {
258 /*
259 * take a breather
260 */
261 blk_delay_queue(drive->queue, 1);
262 return 1;
263 }
264 }
265
266 /**
267 * Returns:
268 * 0: if the request should be continued.
269 * 1: if the request will be going through error recovery.
270 * 2: if the request should be ended.
271 */
272 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
273 {
274 ide_hwif_t *hwif = drive->hwif;
275 struct request *rq = hwif->rq;
276 int err, sense_key, do_end_request = 0;
277
278 /* get the IDE error register */
279 err = ide_read_error(drive);
280 sense_key = err >> 4;
281
282 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
283 "stat 0x%x",
284 rq->cmd[0], rq->cmd_type, err, stat);
285
286 if (ata_sense_request(rq)) {
287 /*
288 * We got an error trying to get sense info from the drive
289 * (probably while trying to recover from a former error).
290 * Just give up.
291 */
292 rq->rq_flags |= RQF_FAILED;
293 return 2;
294 }
295
296 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
297 if (blk_rq_is_scsi(rq) && !rq->errors)
298 rq->errors = SAM_STAT_CHECK_CONDITION;
299
300 if (blk_noretry_request(rq))
301 do_end_request = 1;
302
303 switch (sense_key) {
304 case NOT_READY:
305 if (req_op(rq) == REQ_OP_WRITE) {
306 if (ide_cd_breathe(drive, rq))
307 return 1;
308 } else {
309 cdrom_saw_media_change(drive);
310
311 if (!blk_rq_is_passthrough(rq) &&
312 !(rq->rq_flags & RQF_QUIET))
313 printk(KERN_ERR PFX "%s: tray open\n",
314 drive->name);
315 }
316 do_end_request = 1;
317 break;
318 case UNIT_ATTENTION:
319 cdrom_saw_media_change(drive);
320
321 if (blk_rq_is_passthrough(rq))
322 return 0;
323
324 /*
325 * Arrange to retry the request but be sure to give up if we've
326 * retried too many times.
327 */
328 if (++rq->errors > ERROR_MAX)
329 do_end_request = 1;
330 break;
331 case ILLEGAL_REQUEST:
332 /*
333 * Don't print error message for this condition -- SFF8090i
334 * indicates that 5/24/00 is the correct response to a request
335 * to close the tray if the drive doesn't have that capability.
336 *
337 * cdrom_log_sense() knows this!
338 */
339 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
340 break;
341 /* fall-through */
342 case DATA_PROTECT:
343 /*
344 * No point in retrying after an illegal request or data
345 * protect error.
346 */
347 if (!(rq->rq_flags & RQF_QUIET))
348 ide_dump_status(drive, "command error", stat);
349 do_end_request = 1;
350 break;
351 case MEDIUM_ERROR:
352 /*
353 * No point in re-trying a zillion times on a bad sector.
354 * If we got here the error is not correctable.
355 */
356 if (!(rq->rq_flags & RQF_QUIET))
357 ide_dump_status(drive, "media error "
358 "(bad sector)", stat);
359 do_end_request = 1;
360 break;
361 case BLANK_CHECK:
362 /* disk appears blank? */
363 if (!(rq->rq_flags & RQF_QUIET))
364 ide_dump_status(drive, "media error (blank)",
365 stat);
366 do_end_request = 1;
367 break;
368 default:
369 if (blk_rq_is_passthrough(rq))
370 break;
371 if (err & ~ATA_ABORTED) {
372 /* go to the default handler for other errors */
373 ide_error(drive, "cdrom_decode_status", stat);
374 return 1;
375 } else if (++rq->errors > ERROR_MAX)
376 /* we've racked up too many retries, abort */
377 do_end_request = 1;
378 }
379
380 if (blk_rq_is_passthrough(rq)) {
381 rq->rq_flags |= RQF_FAILED;
382 do_end_request = 1;
383 }
384
385 /*
386 * End a request through request sense analysis when we have sense data.
387 * We need this in order to perform end of media processing.
388 */
389 if (do_end_request)
390 goto end_request;
391
392 /* if we got a CHECK_CONDITION status, queue a request sense command */
393 if (stat & ATA_ERR)
394 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
395 return 1;
396
397 end_request:
398 if (stat & ATA_ERR) {
399 hwif->rq = NULL;
400 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
401 } else
402 return 2;
403 }
404
405 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
406 {
407 struct request *rq = cmd->rq;
408
409 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
410
411 /*
412 * Some of the trailing request sense fields are optional,
413 * and some drives don't send them. Sigh.
414 */
415 if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
416 cmd->nleft > 0 && cmd->nleft <= 5)
417 cmd->nleft = 0;
418 }
419
420 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
421 int write, void *buffer, unsigned *bufflen,
422 struct request_sense *sense, int timeout,
423 req_flags_t rq_flags)
424 {
425 struct cdrom_info *info = drive->driver_data;
426 int retries = 10;
427 bool failed;
428
429 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
430 "rq_flags: 0x%x",
431 cmd[0], write, timeout, rq_flags);
432
433 /* start of retry loop */
434 do {
435 struct request *rq;
436 int error;
437 bool delay = false;
438
439 rq = blk_get_request(drive->queue,
440 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
441 scsi_req_init(rq);
442 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
443 ide_req(rq)->type = ATA_PRIV_PC;
444 rq->rq_flags |= rq_flags;
445 rq->timeout = timeout;
446 if (buffer) {
447 error = blk_rq_map_kern(drive->queue, rq, buffer,
448 *bufflen, GFP_NOIO);
449 if (error) {
450 blk_put_request(rq);
451 return error;
452 }
453 }
454
455 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
456
457 if (buffer)
458 *bufflen = scsi_req(rq)->resid_len;
459 if (sense)
460 memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
461
462 /*
463 * FIXME: we should probably abort/retry or something in case of
464 * failure.
465 */
466 failed = (rq->rq_flags & RQF_FAILED) != 0;
467 if (failed) {
468 /*
469 * The request failed. Retry if it was due to a unit
470 * attention status (usually means media was changed).
471 */
472 struct request_sense *reqbuf = scsi_req(rq)->sense;
473
474 if (reqbuf->sense_key == UNIT_ATTENTION)
475 cdrom_saw_media_change(drive);
476 else if (reqbuf->sense_key == NOT_READY &&
477 reqbuf->asc == 4 && reqbuf->ascq != 4) {
478 /*
479 * The drive is in the process of loading
480 * a disk. Retry, but wait a little to give
481 * the drive time to complete the load.
482 */
483 delay = true;
484 } else {
485 /* otherwise, don't retry */
486 retries = 0;
487 }
488 --retries;
489 }
490 blk_put_request(rq);
491 if (delay)
492 ssleep(2);
493 } while (failed && retries >= 0);
494
495 /* return an error if the command failed */
496 return failed ? -EIO : 0;
497 }
498
499 /*
500 * returns true if rq has been completed
501 */
502 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
503 {
504 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
505
506 if (cmd->tf_flags & IDE_TFLAG_WRITE)
507 nr_bytes -= cmd->last_xfer_len;
508
509 if (nr_bytes > 0) {
510 ide_complete_rq(drive, 0, nr_bytes);
511 return true;
512 }
513
514 return false;
515 }
516
517 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
518 {
519 ide_hwif_t *hwif = drive->hwif;
520 struct ide_cmd *cmd = &hwif->cmd;
521 struct request *rq = hwif->rq;
522 ide_expiry_t *expiry = NULL;
523 int dma_error = 0, dma, thislen, uptodate = 0;
524 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
525 int sense = ata_sense_request(rq);
526 unsigned int timeout;
527 u16 len;
528 u8 ireason, stat;
529
530 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
531
532 /* check for errors */
533 dma = drive->dma;
534 if (dma) {
535 drive->dma = 0;
536 drive->waiting_for_dma = 0;
537 dma_error = hwif->dma_ops->dma_end(drive);
538 ide_dma_unmap_sg(drive, cmd);
539 if (dma_error) {
540 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
541 write ? "write" : "read");
542 ide_dma_off(drive);
543 }
544 }
545
546 /* check status */
547 stat = hwif->tp_ops->read_status(hwif);
548
549 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
550 rc = cdrom_decode_status(drive, stat);
551 if (rc) {
552 if (rc == 2)
553 goto out_end;
554 return ide_stopped;
555 }
556 }
557
558 /* using dma, transfer is complete now */
559 if (dma) {
560 if (dma_error)
561 return ide_error(drive, "dma error", stat);
562 uptodate = 1;
563 goto out_end;
564 }
565
566 ide_read_bcount_and_ireason(drive, &len, &ireason);
567
568 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
569 if (thislen > len)
570 thislen = len;
571
572 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
573 stat, thislen);
574
575 /* If DRQ is clear, the command has completed. */
576 if ((stat & ATA_DRQ) == 0) {
577 switch (req_op(rq)) {
578 default:
579 /*
580 * If we're not done reading/writing, complain.
581 * Otherwise, complete the command normally.
582 */
583 uptodate = 1;
584 if (cmd->nleft > 0) {
585 printk(KERN_ERR PFX "%s: %s: data underrun "
586 "(%u bytes)\n", drive->name, __func__,
587 cmd->nleft);
588 if (!write)
589 rq->rq_flags |= RQF_FAILED;
590 uptodate = 0;
591 }
592 goto out_end;
593 case REQ_OP_DRV_IN:
594 case REQ_OP_DRV_OUT:
595 ide_cd_request_sense_fixup(drive, cmd);
596
597 uptodate = cmd->nleft ? 0 : 1;
598
599 /*
600 * suck out the remaining bytes from the drive in an
601 * attempt to complete the data xfer. (see BZ#13399)
602 */
603 if (!(stat & ATA_ERR) && !uptodate && thislen) {
604 ide_pio_bytes(drive, cmd, write, thislen);
605 uptodate = cmd->nleft ? 0 : 1;
606 }
607
608 if (!uptodate)
609 rq->rq_flags |= RQF_FAILED;
610 goto out_end;
611 case REQ_OP_SCSI_IN:
612 case REQ_OP_SCSI_OUT:
613 goto out_end;
614 }
615 }
616
617 rc = ide_check_ireason(drive, rq, len, ireason, write);
618 if (rc)
619 goto out_end;
620
621 cmd->last_xfer_len = 0;
622
623 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
624 "ireason: 0x%x",
625 rq->cmd_type, ireason);
626
627 /* transfer data */
628 while (thislen > 0) {
629 int blen = min_t(int, thislen, cmd->nleft);
630
631 if (cmd->nleft == 0)
632 break;
633
634 ide_pio_bytes(drive, cmd, write, blen);
635 cmd->last_xfer_len += blen;
636
637 thislen -= blen;
638 len -= blen;
639
640 if (sense && write == 0)
641 scsi_req(rq)->sense_len += blen;
642 }
643
644 /* pad, if necessary */
645 if (len > 0) {
646 if (blk_rq_is_passthrough(rq) || write == 0)
647 ide_pad_transfer(drive, write, len);
648 else {
649 printk(KERN_ERR PFX "%s: confused, missing data\n",
650 drive->name);
651 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
652 }
653 }
654
655 switch (req_op(rq)) {
656 case REQ_OP_SCSI_IN:
657 case REQ_OP_SCSI_OUT:
658 timeout = rq->timeout;
659 break;
660 case REQ_OP_DRV_IN:
661 case REQ_OP_DRV_OUT:
662 expiry = ide_cd_expiry;
663 /*FALLTHRU*/
664 default:
665 timeout = ATAPI_WAIT_PC;
666 break;
667 }
668
669 hwif->expiry = expiry;
670 ide_set_handler(drive, cdrom_newpc_intr, timeout);
671 return ide_started;
672
673 out_end:
674 if (blk_rq_is_scsi(rq) && rc == 0) {
675 scsi_req(rq)->resid_len = 0;
676 blk_end_request_all(rq, 0);
677 hwif->rq = NULL;
678 } else {
679 if (sense && uptodate)
680 ide_cd_complete_failed_rq(drive, rq);
681
682 if (!blk_rq_is_passthrough(rq)) {
683 if (cmd->nleft == 0)
684 uptodate = 1;
685 } else {
686 if (uptodate <= 0 && rq->errors == 0)
687 rq->errors = -EIO;
688 }
689
690 if (uptodate == 0 && rq->bio)
691 if (ide_cd_error_cmd(drive, cmd))
692 return ide_stopped;
693
694 /* make sure it's fully ended */
695 if (blk_rq_is_passthrough(rq)) {
696 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
697 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
698 scsi_req(rq)->resid_len += cmd->last_xfer_len;
699 }
700
701 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
702
703 if (sense && rc == 2)
704 ide_error(drive, "request sense failure", stat);
705 }
706 return ide_stopped;
707 }
708
709 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
710 {
711 struct cdrom_info *cd = drive->driver_data;
712 struct request_queue *q = drive->queue;
713 int write = rq_data_dir(rq) == WRITE;
714 unsigned short sectors_per_frame =
715 queue_logical_block_size(q) >> SECTOR_BITS;
716
717 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
718 "secs_per_frame: %u",
719 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
720
721 if (write) {
722 /* disk has become write protected */
723 if (get_disk_ro(cd->disk))
724 return ide_stopped;
725 } else {
726 /*
727 * We may be retrying this request after an error. Fix up any
728 * weirdness which might be present in the request packet.
729 */
730 q->prep_rq_fn(q, rq);
731 }
732
733 /* fs requests *must* be hardware frame aligned */
734 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
735 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
736 return ide_stopped;
737
738 /* use DMA, if possible */
739 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
740
741 if (write)
742 cd->devinfo.media_written = 1;
743
744 rq->timeout = ATAPI_WAIT_PC;
745
746 return ide_started;
747 }
748
749 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
750 {
751
752 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
753 rq->cmd[0], rq->cmd_type);
754
755 if (blk_rq_is_scsi(rq))
756 rq->rq_flags |= RQF_QUIET;
757 else
758 rq->rq_flags &= ~RQF_FAILED;
759
760 drive->dma = 0;
761
762 /* sg request */
763 if (rq->bio) {
764 struct request_queue *q = drive->queue;
765 char *buf = bio_data(rq->bio);
766 unsigned int alignment;
767
768 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
769
770 /*
771 * check if dma is safe
772 *
773 * NOTE! The "len" and "addr" checks should possibly have
774 * separate masks.
775 */
776 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
777 if ((unsigned long)buf & alignment
778 || blk_rq_bytes(rq) & q->dma_pad_mask
779 || object_is_on_stack(buf))
780 drive->dma = 0;
781 }
782 }
783
784 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
785 sector_t block)
786 {
787 struct ide_cmd cmd;
788 int uptodate = 0;
789 unsigned int nsectors;
790
791 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
792 rq->cmd[0], (unsigned long long)block);
793
794 if (drive->debug_mask & IDE_DBG_RQ)
795 blk_dump_rq_flags(rq, "ide_cd_do_request");
796
797 switch (req_op(rq)) {
798 default:
799 if (cdrom_start_rw(drive, rq) == ide_stopped)
800 goto out_end;
801 break;
802 case REQ_OP_SCSI_IN:
803 case REQ_OP_SCSI_OUT:
804 handle_pc:
805 if (!rq->timeout)
806 rq->timeout = ATAPI_WAIT_PC;
807 cdrom_do_block_pc(drive, rq);
808 break;
809 case REQ_OP_DRV_IN:
810 case REQ_OP_DRV_OUT:
811 switch (ide_req(rq)->type) {
812 case ATA_PRIV_MISC:
813 /* right now this can only be a reset... */
814 uptodate = 1;
815 goto out_end;
816 case ATA_PRIV_SENSE:
817 case ATA_PRIV_PC:
818 goto handle_pc;
819 default:
820 BUG();
821 }
822 }
823
824 /* prepare sense request for this command */
825 ide_prep_sense(drive, rq);
826
827 memset(&cmd, 0, sizeof(cmd));
828
829 if (rq_data_dir(rq))
830 cmd.tf_flags |= IDE_TFLAG_WRITE;
831
832 cmd.rq = rq;
833
834 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
835 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
836 ide_map_sg(drive, &cmd);
837 }
838
839 return ide_issue_pc(drive, &cmd);
840 out_end:
841 nsectors = blk_rq_sectors(rq);
842
843 if (nsectors == 0)
844 nsectors = 1;
845
846 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
847
848 return ide_stopped;
849 }
850
851 /*
852 * Ioctl handling.
853 *
854 * Routines which queue packet commands take as a final argument a pointer to a
855 * request_sense struct. If execution of the command results in an error with a
856 * CHECK CONDITION status, this structure will be filled with the results of the
857 * subsequent request sense command. The pointer can also be NULL, in which case
858 * no sense information is returned.
859 */
860 static void msf_from_bcd(struct atapi_msf *msf)
861 {
862 msf->minute = bcd2bin(msf->minute);
863 msf->second = bcd2bin(msf->second);
864 msf->frame = bcd2bin(msf->frame);
865 }
866
867 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
868 {
869 struct cdrom_info *info = drive->driver_data;
870 struct cdrom_device_info *cdi = &info->devinfo;
871 unsigned char cmd[BLK_MAX_CDB];
872
873 ide_debug_log(IDE_DBG_FUNC, "enter");
874
875 memset(cmd, 0, BLK_MAX_CDB);
876 cmd[0] = GPCMD_TEST_UNIT_READY;
877
878 /*
879 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
880 * instead of supporting the LOAD_UNLOAD opcode.
881 */
882 cmd[7] = cdi->sanyo_slot % 3;
883
884 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
885 }
886
887 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
888 unsigned long *sectors_per_frame,
889 struct request_sense *sense)
890 {
891 struct {
892 __be32 lba;
893 __be32 blocklen;
894 } capbuf;
895
896 int stat;
897 unsigned char cmd[BLK_MAX_CDB];
898 unsigned len = sizeof(capbuf);
899 u32 blocklen;
900
901 ide_debug_log(IDE_DBG_FUNC, "enter");
902
903 memset(cmd, 0, BLK_MAX_CDB);
904 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
905
906 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
907 RQF_QUIET);
908 if (stat)
909 return stat;
910
911 /*
912 * Sanity check the given block size, in so far as making
913 * sure the sectors_per_frame we give to the caller won't
914 * end up being bogus.
915 */
916 blocklen = be32_to_cpu(capbuf.blocklen);
917 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
918 switch (blocklen) {
919 case 512:
920 case 1024:
921 case 2048:
922 case 4096:
923 break;
924 default:
925 printk_once(KERN_ERR PFX "%s: weird block size %u; "
926 "setting default block size to 2048\n",
927 drive->name, blocklen);
928 blocklen = 2048;
929 break;
930 }
931
932 *capacity = 1 + be32_to_cpu(capbuf.lba);
933 *sectors_per_frame = blocklen >> SECTOR_BITS;
934
935 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
936 *capacity, *sectors_per_frame);
937
938 return 0;
939 }
940
941 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
942 int format, char *buf, int buflen,
943 struct request_sense *sense)
944 {
945 unsigned char cmd[BLK_MAX_CDB];
946
947 ide_debug_log(IDE_DBG_FUNC, "enter");
948
949 memset(cmd, 0, BLK_MAX_CDB);
950
951 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
952 cmd[6] = trackno;
953 cmd[7] = (buflen >> 8);
954 cmd[8] = (buflen & 0xff);
955 cmd[9] = (format << 6);
956
957 if (msf_flag)
958 cmd[1] = 2;
959
960 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
961 }
962
963 /* Try to read the entire TOC for the disk into our internal buffer. */
964 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
965 {
966 int stat, ntracks, i;
967 struct cdrom_info *info = drive->driver_data;
968 struct cdrom_device_info *cdi = &info->devinfo;
969 struct atapi_toc *toc = info->toc;
970 struct {
971 struct atapi_toc_header hdr;
972 struct atapi_toc_entry ent;
973 } ms_tmp;
974 long last_written;
975 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
976
977 ide_debug_log(IDE_DBG_FUNC, "enter");
978
979 if (toc == NULL) {
980 /* try to allocate space */
981 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
982 if (toc == NULL) {
983 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
984 drive->name);
985 return -ENOMEM;
986 }
987 info->toc = toc;
988 }
989
990 /*
991 * Check to see if the existing data is still valid. If it is,
992 * just return.
993 */
994 (void) cdrom_check_status(drive, sense);
995
996 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
997 return 0;
998
999 /* try to get the total cdrom capacity and sector size */
1000 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1001 sense);
1002 if (stat)
1003 toc->capacity = 0x1fffff;
1004
1005 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1006 /* save a private copy of the TOC capacity for error handling */
1007 drive->probed_capacity = toc->capacity * sectors_per_frame;
1008
1009 blk_queue_logical_block_size(drive->queue,
1010 sectors_per_frame << SECTOR_BITS);
1011
1012 /* first read just the header, so we know how long the TOC is */
1013 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1014 sizeof(struct atapi_toc_header), sense);
1015 if (stat)
1016 return stat;
1017
1018 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1019 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1020 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1021 }
1022
1023 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1024 if (ntracks <= 0)
1025 return -EIO;
1026 if (ntracks > MAX_TRACKS)
1027 ntracks = MAX_TRACKS;
1028
1029 /* now read the whole schmeer */
1030 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1031 (char *)&toc->hdr,
1032 sizeof(struct atapi_toc_header) +
1033 (ntracks + 1) *
1034 sizeof(struct atapi_toc_entry), sense);
1035
1036 if (stat && toc->hdr.first_track > 1) {
1037 /*
1038 * Cds with CDI tracks only don't have any TOC entries, despite
1039 * of this the returned values are
1040 * first_track == last_track = number of CDI tracks + 1,
1041 * so that this case is indistinguishable from the same layout
1042 * plus an additional audio track. If we get an error for the
1043 * regular case, we assume a CDI without additional audio
1044 * tracks. In this case the readable TOC is empty (CDI tracks
1045 * are not included) and only holds the Leadout entry.
1046 *
1047 * Heiko Eißfeldt.
1048 */
1049 ntracks = 0;
1050 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1051 (char *)&toc->hdr,
1052 sizeof(struct atapi_toc_header) +
1053 (ntracks + 1) *
1054 sizeof(struct atapi_toc_entry),
1055 sense);
1056 if (stat)
1057 return stat;
1058
1059 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1061 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1062 } else {
1063 toc->hdr.first_track = CDROM_LEADOUT;
1064 toc->hdr.last_track = CDROM_LEADOUT;
1065 }
1066 }
1067
1068 if (stat)
1069 return stat;
1070
1071 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1072
1073 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1074 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1075 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1076 }
1077
1078 for (i = 0; i <= ntracks; i++) {
1079 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1080 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1081 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1082 msf_from_bcd(&toc->ent[i].addr.msf);
1083 }
1084 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1085 toc->ent[i].addr.msf.second,
1086 toc->ent[i].addr.msf.frame);
1087 }
1088
1089 if (toc->hdr.first_track != CDROM_LEADOUT) {
1090 /* read the multisession information */
1091 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1092 sizeof(ms_tmp), sense);
1093 if (stat)
1094 return stat;
1095
1096 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1097 } else {
1098 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1099 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1100 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1101 }
1102
1103 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1104 /* re-read multisession information using MSF format */
1105 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1106 sizeof(ms_tmp), sense);
1107 if (stat)
1108 return stat;
1109
1110 msf_from_bcd(&ms_tmp.ent.addr.msf);
1111 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1112 ms_tmp.ent.addr.msf.second,
1113 ms_tmp.ent.addr.msf.frame);
1114 }
1115
1116 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1117
1118 /* now try to get the total cdrom capacity */
1119 stat = cdrom_get_last_written(cdi, &last_written);
1120 if (!stat && (last_written > toc->capacity)) {
1121 toc->capacity = last_written;
1122 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1123 drive->probed_capacity = toc->capacity * sectors_per_frame;
1124 }
1125
1126 /* Remember that we've read this stuff. */
1127 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1128
1129 return 0;
1130 }
1131
1132 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1133 {
1134 struct cdrom_info *info = drive->driver_data;
1135 struct cdrom_device_info *cdi = &info->devinfo;
1136 struct packet_command cgc;
1137 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1138
1139 ide_debug_log(IDE_DBG_FUNC, "enter");
1140
1141 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1142 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1143
1144 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1145 do {
1146 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1147 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1148 if (!stat)
1149 break;
1150 } while (--attempts);
1151 return stat;
1152 }
1153
1154 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1155 {
1156 struct cdrom_info *cd = drive->driver_data;
1157 u16 curspeed, maxspeed;
1158
1159 ide_debug_log(IDE_DBG_FUNC, "enter");
1160
1161 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1162 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1163 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1164 } else {
1165 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1166 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1167 }
1168
1169 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1170 curspeed, maxspeed);
1171
1172 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1173 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1174 }
1175
1176 #define IDE_CD_CAPABILITIES \
1177 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1178 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1179 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1180 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1181 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1182
1183 static const struct cdrom_device_ops ide_cdrom_dops = {
1184 .open = ide_cdrom_open_real,
1185 .release = ide_cdrom_release_real,
1186 .drive_status = ide_cdrom_drive_status,
1187 .check_events = ide_cdrom_check_events_real,
1188 .tray_move = ide_cdrom_tray_move,
1189 .lock_door = ide_cdrom_lock_door,
1190 .select_speed = ide_cdrom_select_speed,
1191 .get_last_session = ide_cdrom_get_last_session,
1192 .get_mcn = ide_cdrom_get_mcn,
1193 .reset = ide_cdrom_reset,
1194 .audio_ioctl = ide_cdrom_audio_ioctl,
1195 .capability = IDE_CD_CAPABILITIES,
1196 .generic_packet = ide_cdrom_packet,
1197 };
1198
1199 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1200 {
1201 struct cdrom_info *info = drive->driver_data;
1202 struct cdrom_device_info *devinfo = &info->devinfo;
1203
1204 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1205
1206 devinfo->ops = &ide_cdrom_dops;
1207 devinfo->speed = info->current_speed;
1208 devinfo->capacity = nslots;
1209 devinfo->handle = drive;
1210 strcpy(devinfo->name, drive->name);
1211
1212 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1213 devinfo->mask |= CDC_SELECT_SPEED;
1214
1215 devinfo->disk = info->disk;
1216 return register_cdrom(devinfo);
1217 }
1218
1219 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1220 {
1221 struct cdrom_info *cd = drive->driver_data;
1222 struct cdrom_device_info *cdi = &cd->devinfo;
1223 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1224 mechtype_t mechtype;
1225 int nslots = 1;
1226
1227 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1228 drive->media, drive->atapi_flags);
1229
1230 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1231 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1232 CDC_MO_DRIVE | CDC_RAM);
1233
1234 if (drive->media == ide_optical) {
1235 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1236 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1237 drive->name);
1238 return nslots;
1239 }
1240
1241 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1242 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1243 cdi->mask &= ~CDC_PLAY_AUDIO;
1244 return nslots;
1245 }
1246
1247 /*
1248 * We have to cheat a little here. the packet will eventually be queued
1249 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1250 * Since this device hasn't been registered with the Uniform layer yet,
1251 * it can't do this. Same goes for cdi->ops.
1252 */
1253 cdi->handle = drive;
1254 cdi->ops = &ide_cdrom_dops;
1255
1256 if (ide_cdrom_get_capabilities(drive, buf))
1257 return 0;
1258
1259 if ((buf[8 + 6] & 0x01) == 0)
1260 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1261 if (buf[8 + 6] & 0x08)
1262 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1263 if (buf[8 + 3] & 0x01)
1264 cdi->mask &= ~CDC_CD_R;
1265 if (buf[8 + 3] & 0x02)
1266 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1267 if (buf[8 + 2] & 0x38)
1268 cdi->mask &= ~CDC_DVD;
1269 if (buf[8 + 3] & 0x20)
1270 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1271 if (buf[8 + 3] & 0x10)
1272 cdi->mask &= ~CDC_DVD_R;
1273 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1274 cdi->mask &= ~CDC_PLAY_AUDIO;
1275
1276 mechtype = buf[8 + 6] >> 5;
1277 if (mechtype == mechtype_caddy ||
1278 mechtype == mechtype_popup ||
1279 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1280 cdi->mask |= CDC_CLOSE_TRAY;
1281
1282 if (cdi->sanyo_slot > 0) {
1283 cdi->mask &= ~CDC_SELECT_DISC;
1284 nslots = 3;
1285 } else if (mechtype == mechtype_individual_changer ||
1286 mechtype == mechtype_cartridge_changer) {
1287 nslots = cdrom_number_of_slots(cdi);
1288 if (nslots > 1)
1289 cdi->mask &= ~CDC_SELECT_DISC;
1290 }
1291
1292 ide_cdrom_update_speed(drive, buf);
1293
1294 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1295
1296 /* don't print speed if the drive reported 0 */
1297 if (cd->max_speed)
1298 printk(KERN_CONT " %dX", cd->max_speed);
1299
1300 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1301
1302 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1303 printk(KERN_CONT " DVD%s%s",
1304 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1305 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1306
1307 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1308 printk(KERN_CONT " CD%s%s",
1309 (cdi->mask & CDC_CD_R) ? "" : "-R",
1310 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1311
1312 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1313 printk(KERN_CONT " changer w/%d slots", nslots);
1314 else
1315 printk(KERN_CONT " drive");
1316
1317 printk(KERN_CONT ", %dkB Cache\n",
1318 be16_to_cpup((__be16 *)&buf[8 + 12]));
1319
1320 return nslots;
1321 }
1322
1323 /* standard prep_rq_fn that builds 10 byte cmds */
1324 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1325 {
1326 int hard_sect = queue_logical_block_size(q);
1327 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1328 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1329 struct scsi_request *req = scsi_req(rq);
1330
1331 memset(req->cmd, 0, BLK_MAX_CDB);
1332
1333 if (rq_data_dir(rq) == READ)
1334 req->cmd[0] = GPCMD_READ_10;
1335 else
1336 req->cmd[0] = GPCMD_WRITE_10;
1337
1338 /*
1339 * fill in lba
1340 */
1341 req->cmd[2] = (block >> 24) & 0xff;
1342 req->cmd[3] = (block >> 16) & 0xff;
1343 req->cmd[4] = (block >> 8) & 0xff;
1344 req->cmd[5] = block & 0xff;
1345
1346 /*
1347 * and transfer length
1348 */
1349 req->cmd[7] = (blocks >> 8) & 0xff;
1350 req->cmd[8] = blocks & 0xff;
1351 req->cmd_len = 10;
1352 return BLKPREP_OK;
1353 }
1354
1355 /*
1356 * Most of the SCSI commands are supported directly by ATAPI devices.
1357 * This transform handles the few exceptions.
1358 */
1359 static int ide_cdrom_prep_pc(struct request *rq)
1360 {
1361 u8 *c = scsi_req(rq)->cmd;
1362
1363 /* transform 6-byte read/write commands to the 10-byte version */
1364 if (c[0] == READ_6 || c[0] == WRITE_6) {
1365 c[8] = c[4];
1366 c[5] = c[3];
1367 c[4] = c[2];
1368 c[3] = c[1] & 0x1f;
1369 c[2] = 0;
1370 c[1] &= 0xe0;
1371 c[0] += (READ_10 - READ_6);
1372 scsi_req(rq)->cmd_len = 10;
1373 return BLKPREP_OK;
1374 }
1375
1376 /*
1377 * it's silly to pretend we understand 6-byte sense commands, just
1378 * reject with ILLEGAL_REQUEST and the caller should take the
1379 * appropriate action
1380 */
1381 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1382 rq->errors = ILLEGAL_REQUEST;
1383 return BLKPREP_KILL;
1384 }
1385
1386 return BLKPREP_OK;
1387 }
1388
1389 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1390 {
1391 if (!blk_rq_is_passthrough(rq))
1392 return ide_cdrom_prep_fs(q, rq);
1393 else if (blk_rq_is_scsi(rq))
1394 return ide_cdrom_prep_pc(rq);
1395
1396 return 0;
1397 }
1398
1399 struct cd_list_entry {
1400 const char *id_model;
1401 const char *id_firmware;
1402 unsigned int cd_flags;
1403 };
1404
1405 #ifdef CONFIG_IDE_PROC_FS
1406 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1407 {
1408 unsigned long capacity, sectors_per_frame;
1409
1410 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1411 return 0;
1412
1413 return capacity * sectors_per_frame;
1414 }
1415
1416 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1417 {
1418 ide_drive_t *drive = m->private;
1419
1420 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1421 return 0;
1422 }
1423
1424 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1425 {
1426 return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1427 }
1428
1429 static const struct file_operations idecd_capacity_proc_fops = {
1430 .owner = THIS_MODULE,
1431 .open = idecd_capacity_proc_open,
1432 .read = seq_read,
1433 .llseek = seq_lseek,
1434 .release = single_release,
1435 };
1436
1437 static ide_proc_entry_t idecd_proc[] = {
1438 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1439 {}
1440 };
1441
1442 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1443 {
1444 return idecd_proc;
1445 }
1446
1447 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1448 {
1449 return NULL;
1450 }
1451 #endif
1452
1453 static const struct cd_list_entry ide_cd_quirks_list[] = {
1454 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1455 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1456 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1457 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1458 IDE_AFLAG_PRE_ATAPI12, },
1459 /* Vertos 300, some versions of this drive like to talk BCD. */
1460 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1461 /* Vertos 600 ESD. */
1462 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1463 /*
1464 * Sanyo 3 CD changer uses a non-standard command for CD changing
1465 * (by default standard ATAPI support for CD changers is used).
1466 */
1467 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1468 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1469 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1470 /* Stingray 8X CD-ROM. */
1471 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1472 /*
1473 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1474 * mode sense page capabilities size, but older drives break.
1475 */
1476 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1477 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1478 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1479 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1480 /*
1481 * Some drives used by Apple don't advertise audio play
1482 * but they do support reading TOC & audio datas.
1483 */
1484 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1485 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1486 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1487 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1488 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1489 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1490 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1491 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1492 { NULL, NULL, 0 }
1493 };
1494
1495 static unsigned int ide_cd_flags(u16 *id)
1496 {
1497 const struct cd_list_entry *cle = ide_cd_quirks_list;
1498
1499 while (cle->id_model) {
1500 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1501 (cle->id_firmware == NULL ||
1502 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1503 return cle->cd_flags;
1504 cle++;
1505 }
1506
1507 return 0;
1508 }
1509
1510 static int ide_cdrom_setup(ide_drive_t *drive)
1511 {
1512 struct cdrom_info *cd = drive->driver_data;
1513 struct cdrom_device_info *cdi = &cd->devinfo;
1514 struct request_queue *q = drive->queue;
1515 u16 *id = drive->id;
1516 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1517 int nslots;
1518
1519 ide_debug_log(IDE_DBG_PROBE, "enter");
1520
1521 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1522 blk_queue_dma_alignment(q, 31);
1523 blk_queue_update_dma_pad(q, 15);
1524
1525 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1526 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1527
1528 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1529 fw_rev[4] == '1' && fw_rev[6] <= '2')
1530 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1531 IDE_AFLAG_TOCADDR_AS_BCD);
1532 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1533 fw_rev[4] == '1' && fw_rev[6] <= '2')
1534 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1535 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1536 /* 3 => use CD in slot 0 */
1537 cdi->sanyo_slot = 3;
1538
1539 nslots = ide_cdrom_probe_capabilities(drive);
1540
1541 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1542
1543 if (ide_cdrom_register(drive, nslots)) {
1544 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1545 " cdrom driver.\n", drive->name, __func__);
1546 cd->devinfo.handle = NULL;
1547 return 1;
1548 }
1549
1550 ide_proc_register_driver(drive, cd->driver);
1551 return 0;
1552 }
1553
1554 static void ide_cd_remove(ide_drive_t *drive)
1555 {
1556 struct cdrom_info *info = drive->driver_data;
1557
1558 ide_debug_log(IDE_DBG_FUNC, "enter");
1559
1560 ide_proc_unregister_driver(drive, info->driver);
1561 device_del(&info->dev);
1562 del_gendisk(info->disk);
1563
1564 mutex_lock(&idecd_ref_mutex);
1565 put_device(&info->dev);
1566 mutex_unlock(&idecd_ref_mutex);
1567 }
1568
1569 static void ide_cd_release(struct device *dev)
1570 {
1571 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1572 struct cdrom_device_info *devinfo = &info->devinfo;
1573 ide_drive_t *drive = info->drive;
1574 struct gendisk *g = info->disk;
1575
1576 ide_debug_log(IDE_DBG_FUNC, "enter");
1577
1578 kfree(info->toc);
1579 if (devinfo->handle == drive)
1580 unregister_cdrom(devinfo);
1581 drive->driver_data = NULL;
1582 blk_queue_prep_rq(drive->queue, NULL);
1583 g->private_data = NULL;
1584 put_disk(g);
1585 kfree(info);
1586 }
1587
1588 static int ide_cd_probe(ide_drive_t *);
1589
1590 static struct ide_driver ide_cdrom_driver = {
1591 .gen_driver = {
1592 .owner = THIS_MODULE,
1593 .name = "ide-cdrom",
1594 .bus = &ide_bus_type,
1595 },
1596 .probe = ide_cd_probe,
1597 .remove = ide_cd_remove,
1598 .version = IDECD_VERSION,
1599 .do_request = ide_cd_do_request,
1600 #ifdef CONFIG_IDE_PROC_FS
1601 .proc_entries = ide_cd_proc_entries,
1602 .proc_devsets = ide_cd_proc_devsets,
1603 #endif
1604 };
1605
1606 static int idecd_open(struct block_device *bdev, fmode_t mode)
1607 {
1608 struct cdrom_info *info;
1609 int rc = -ENXIO;
1610
1611 mutex_lock(&ide_cd_mutex);
1612 info = ide_cd_get(bdev->bd_disk);
1613 if (!info)
1614 goto out;
1615
1616 rc = cdrom_open(&info->devinfo, bdev, mode);
1617 if (rc < 0)
1618 ide_cd_put(info);
1619 out:
1620 mutex_unlock(&ide_cd_mutex);
1621 return rc;
1622 }
1623
1624 static void idecd_release(struct gendisk *disk, fmode_t mode)
1625 {
1626 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1627
1628 mutex_lock(&ide_cd_mutex);
1629 cdrom_release(&info->devinfo, mode);
1630
1631 ide_cd_put(info);
1632 mutex_unlock(&ide_cd_mutex);
1633 }
1634
1635 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1636 {
1637 struct packet_command cgc;
1638 char buffer[16];
1639 int stat;
1640 char spindown;
1641
1642 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1643 return -EFAULT;
1644
1645 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1646
1647 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1648 if (stat)
1649 return stat;
1650
1651 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1652 return cdrom_mode_select(cdi, &cgc);
1653 }
1654
1655 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1656 {
1657 struct packet_command cgc;
1658 char buffer[16];
1659 int stat;
1660 char spindown;
1661
1662 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1663
1664 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1665 if (stat)
1666 return stat;
1667
1668 spindown = buffer[11] & 0x0f;
1669 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1670 return -EFAULT;
1671 return 0;
1672 }
1673
1674 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1675 unsigned int cmd, unsigned long arg)
1676 {
1677 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1678 int err;
1679
1680 switch (cmd) {
1681 case CDROMSETSPINDOWN:
1682 return idecd_set_spindown(&info->devinfo, arg);
1683 case CDROMGETSPINDOWN:
1684 return idecd_get_spindown(&info->devinfo, arg);
1685 default:
1686 break;
1687 }
1688
1689 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1690 if (err == -EINVAL)
1691 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1692
1693 return err;
1694 }
1695
1696 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1697 unsigned int cmd, unsigned long arg)
1698 {
1699 int ret;
1700
1701 mutex_lock(&ide_cd_mutex);
1702 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1703 mutex_unlock(&ide_cd_mutex);
1704
1705 return ret;
1706 }
1707
1708
1709 static unsigned int idecd_check_events(struct gendisk *disk,
1710 unsigned int clearing)
1711 {
1712 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1713 return cdrom_check_events(&info->devinfo, clearing);
1714 }
1715
1716 static int idecd_revalidate_disk(struct gendisk *disk)
1717 {
1718 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1719 struct request_sense sense;
1720
1721 ide_cd_read_toc(info->drive, &sense);
1722
1723 return 0;
1724 }
1725
1726 static const struct block_device_operations idecd_ops = {
1727 .owner = THIS_MODULE,
1728 .open = idecd_open,
1729 .release = idecd_release,
1730 .ioctl = idecd_ioctl,
1731 .check_events = idecd_check_events,
1732 .revalidate_disk = idecd_revalidate_disk
1733 };
1734
1735 /* module options */
1736 static unsigned long debug_mask;
1737 module_param(debug_mask, ulong, 0644);
1738
1739 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1740
1741 static int ide_cd_probe(ide_drive_t *drive)
1742 {
1743 struct cdrom_info *info;
1744 struct gendisk *g;
1745 struct request_sense sense;
1746
1747 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1748 drive->driver_req, drive->media);
1749
1750 if (!strstr("ide-cdrom", drive->driver_req))
1751 goto failed;
1752
1753 if (drive->media != ide_cdrom && drive->media != ide_optical)
1754 goto failed;
1755
1756 drive->debug_mask = debug_mask;
1757 drive->irq_handler = cdrom_newpc_intr;
1758
1759 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1760 if (info == NULL) {
1761 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1762 drive->name);
1763 goto failed;
1764 }
1765
1766 g = alloc_disk(1 << PARTN_BITS);
1767 if (!g)
1768 goto out_free_cd;
1769
1770 ide_init_disk(g, drive);
1771
1772 info->dev.parent = &drive->gendev;
1773 info->dev.release = ide_cd_release;
1774 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1775
1776 if (device_register(&info->dev))
1777 goto out_free_disk;
1778
1779 info->drive = drive;
1780 info->driver = &ide_cdrom_driver;
1781 info->disk = g;
1782
1783 g->private_data = &info->driver;
1784
1785 drive->driver_data = info;
1786
1787 g->minors = 1;
1788 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1789 if (ide_cdrom_setup(drive)) {
1790 put_device(&info->dev);
1791 goto failed;
1792 }
1793
1794 ide_cd_read_toc(drive, &sense);
1795 g->fops = &idecd_ops;
1796 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1797 device_add_disk(&drive->gendev, g);
1798 return 0;
1799
1800 out_free_disk:
1801 put_disk(g);
1802 out_free_cd:
1803 kfree(info);
1804 failed:
1805 return -ENODEV;
1806 }
1807
1808 static void __exit ide_cdrom_exit(void)
1809 {
1810 driver_unregister(&ide_cdrom_driver.gen_driver);
1811 }
1812
1813 static int __init ide_cdrom_init(void)
1814 {
1815 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1816 return driver_register(&ide_cdrom_driver.gen_driver);
1817 }
1818
1819 MODULE_ALIAS("ide:*m-cdrom*");
1820 MODULE_ALIAS("ide-cd");
1821 module_init(ide_cdrom_init);
1822 module_exit(ide_cdrom_exit);
1823 MODULE_LICENSE("GPL");
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