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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / ide / ide-cd.c
blob87ace9ecdc265557528b3e511edb403a02fc7bee
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/smp_lock.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/irq.h>
48 #include <linux/io.h>
49 #include <asm/byteorder.h>
50 #include <linux/uaccess.h>
51 #include <asm/unaligned.h>
52
53 #include "ide-cd.h"
54
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->cmd_flags & REQ_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 (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 && 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 failed_command->cmd_type != REQ_TYPE_FS)
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 REQ_TYPE_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 if (failed->sense) {
224 /*
225 * Sense is always read into drive->sense_data.
226 * Copy back if the failed request has its
227 * sense pointer set.
228 */
229 memcpy(failed->sense, sense, 18);
230 failed->sense_len = rq->sense_len;
231 }
232 cdrom_analyze_sense_data(drive, failed);
233
234 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
235 BUG();
236 } else
237 cdrom_analyze_sense_data(drive, NULL);
238 }
239
240
241 /*
242 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
243 * while flushing data from cache.
244 *
245 * returns: 0 failed (write timeout expired)
246 * 1 success
247 */
248 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
249 {
250
251 struct cdrom_info *info = drive->driver_data;
252
253 if (!rq->errors)
254 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
255
256 rq->errors = 1;
257
258 if (time_after(jiffies, info->write_timeout))
259 return 0;
260 else {
261 struct request_queue *q = drive->queue;
262 unsigned long flags;
263
264 /*
265 * take a breather relying on the unplug timer to kick us again
266 */
267
268 spin_lock_irqsave(q->queue_lock, flags);
269 blk_plug_device(q);
270 spin_unlock_irqrestore(q->queue_lock, flags);
271
272 return 1;
273 }
274 }
275
276 /**
277 * Returns:
278 * 0: if the request should be continued.
279 * 1: if the request will be going through error recovery.
280 * 2: if the request should be ended.
281 */
282 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
283 {
284 ide_hwif_t *hwif = drive->hwif;
285 struct request *rq = hwif->rq;
286 int err, sense_key, do_end_request = 0;
287
288 /* get the IDE error register */
289 err = ide_read_error(drive);
290 sense_key = err >> 4;
291
292 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
293 "stat 0x%x",
294 rq->cmd[0], rq->cmd_type, err, stat);
295
296 if (rq->cmd_type == REQ_TYPE_SENSE) {
297 /*
298 * We got an error trying to get sense info from the drive
299 * (probably while trying to recover from a former error).
300 * Just give up.
301 */
302 rq->cmd_flags |= REQ_FAILED;
303 return 2;
304 }
305
306 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
307 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
308 rq->errors = SAM_STAT_CHECK_CONDITION;
309
310 if (blk_noretry_request(rq))
311 do_end_request = 1;
312
313 switch (sense_key) {
314 case NOT_READY:
315 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
316 if (ide_cd_breathe(drive, rq))
317 return 1;
318 } else {
319 cdrom_saw_media_change(drive);
320
321 if (rq->cmd_type == REQ_TYPE_FS &&
322 !(rq->cmd_flags & REQ_QUIET))
323 printk(KERN_ERR PFX "%s: tray open\n",
324 drive->name);
325 }
326 do_end_request = 1;
327 break;
328 case UNIT_ATTENTION:
329 cdrom_saw_media_change(drive);
330
331 if (rq->cmd_type != REQ_TYPE_FS)
332 return 0;
333
334 /*
335 * Arrange to retry the request but be sure to give up if we've
336 * retried too many times.
337 */
338 if (++rq->errors > ERROR_MAX)
339 do_end_request = 1;
340 break;
341 case ILLEGAL_REQUEST:
342 /*
343 * Don't print error message for this condition -- SFF8090i
344 * indicates that 5/24/00 is the correct response to a request
345 * to close the tray if the drive doesn't have that capability.
346 *
347 * cdrom_log_sense() knows this!
348 */
349 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
350 break;
351 /* fall-through */
352 case DATA_PROTECT:
353 /*
354 * No point in retrying after an illegal request or data
355 * protect error.
356 */
357 if (!(rq->cmd_flags & REQ_QUIET))
358 ide_dump_status(drive, "command error", stat);
359 do_end_request = 1;
360 break;
361 case MEDIUM_ERROR:
362 /*
363 * No point in re-trying a zillion times on a bad sector.
364 * If we got here the error is not correctable.
365 */
366 if (!(rq->cmd_flags & REQ_QUIET))
367 ide_dump_status(drive, "media error "
368 "(bad sector)", stat);
369 do_end_request = 1;
370 break;
371 case BLANK_CHECK:
372 /* disk appears blank? */
373 if (!(rq->cmd_flags & REQ_QUIET))
374 ide_dump_status(drive, "media error (blank)",
375 stat);
376 do_end_request = 1;
377 break;
378 default:
379 if (rq->cmd_type != REQ_TYPE_FS)
380 break;
381 if (err & ~ATA_ABORTED) {
382 /* go to the default handler for other errors */
383 ide_error(drive, "cdrom_decode_status", stat);
384 return 1;
385 } else if (++rq->errors > ERROR_MAX)
386 /* we've racked up too many retries, abort */
387 do_end_request = 1;
388 }
389
390 if (rq->cmd_type != REQ_TYPE_FS) {
391 rq->cmd_flags |= REQ_FAILED;
392 do_end_request = 1;
393 }
394
395 /*
396 * End a request through request sense analysis when we have sense data.
397 * We need this in order to perform end of media processing.
398 */
399 if (do_end_request)
400 goto end_request;
401
402 /* if we got a CHECK_CONDITION status, queue a request sense command */
403 if (stat & ATA_ERR)
404 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
405 return 1;
406
407 end_request:
408 if (stat & ATA_ERR) {
409 hwif->rq = NULL;
410 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
411 } else
412 return 2;
413 }
414
415 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
416 {
417 struct request *rq = cmd->rq;
418
419 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
420
421 /*
422 * Some of the trailing request sense fields are optional,
423 * and some drives don't send them. Sigh.
424 */
425 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
426 cmd->nleft > 0 && cmd->nleft <= 5)
427 cmd->nleft = 0;
428 }
429
430 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
431 int write, void *buffer, unsigned *bufflen,
432 struct request_sense *sense, int timeout,
433 unsigned int cmd_flags)
434 {
435 struct cdrom_info *info = drive->driver_data;
436 struct request_sense local_sense;
437 int retries = 10;
438 unsigned int flags = 0;
439
440 if (!sense)
441 sense = &local_sense;
442
443 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
444 "cmd_flags: 0x%x",
445 cmd[0], write, timeout, cmd_flags);
446
447 /* start of retry loop */
448 do {
449 struct request *rq;
450 int error;
451
452 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
453
454 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
455 rq->cmd_type = REQ_TYPE_ATA_PC;
456 rq->sense = sense;
457 rq->cmd_flags |= cmd_flags;
458 rq->timeout = timeout;
459 if (buffer) {
460 error = blk_rq_map_kern(drive->queue, rq, buffer,
461 *bufflen, GFP_NOIO);
462 if (error) {
463 blk_put_request(rq);
464 return error;
465 }
466 }
467
468 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
469
470 if (buffer)
471 *bufflen = rq->resid_len;
472
473 flags = rq->cmd_flags;
474 blk_put_request(rq);
475
476 if (flags & REQ_FAILED) {
477 /*
478 * The request failed. Retry if it was due to a unit
479 * attention status (usually means media was changed).
480 */
481 struct request_sense *reqbuf = sense;
482
483 if (reqbuf->sense_key == UNIT_ATTENTION)
484 cdrom_saw_media_change(drive);
485 else if (reqbuf->sense_key == NOT_READY &&
486 reqbuf->asc == 4 && reqbuf->ascq != 4) {
487 /*
488 * The drive is in the process of loading
489 * a disk. Retry, but wait a little to give
490 * the drive time to complete the load.
491 */
492 ssleep(2);
493 } else {
494 /* otherwise, don't retry */
495 retries = 0;
496 }
497 --retries;
498 }
499
500 /* end of retry loop */
501 } while ((flags & REQ_FAILED) && retries >= 0);
502
503 /* return an error if the command failed */
504 return (flags & REQ_FAILED) ? -EIO : 0;
505 }
506
507 /*
508 * returns true if rq has been completed
509 */
510 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
511 {
512 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
513
514 if (cmd->tf_flags & IDE_TFLAG_WRITE)
515 nr_bytes -= cmd->last_xfer_len;
516
517 if (nr_bytes > 0) {
518 ide_complete_rq(drive, 0, nr_bytes);
519 return true;
520 }
521
522 return false;
523 }
524
525 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
526 {
527 ide_hwif_t *hwif = drive->hwif;
528 struct ide_cmd *cmd = &hwif->cmd;
529 struct request *rq = hwif->rq;
530 ide_expiry_t *expiry = NULL;
531 int dma_error = 0, dma, thislen, uptodate = 0;
532 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
533 int sense = (rq->cmd_type == REQ_TYPE_SENSE);
534 unsigned int timeout;
535 u16 len;
536 u8 ireason, stat;
537
538 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
539
540 /* check for errors */
541 dma = drive->dma;
542 if (dma) {
543 drive->dma = 0;
544 drive->waiting_for_dma = 0;
545 dma_error = hwif->dma_ops->dma_end(drive);
546 ide_dma_unmap_sg(drive, cmd);
547 if (dma_error) {
548 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
549 write ? "write" : "read");
550 ide_dma_off(drive);
551 }
552 }
553
554 /* check status */
555 stat = hwif->tp_ops->read_status(hwif);
556
557 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
558 rc = cdrom_decode_status(drive, stat);
559 if (rc) {
560 if (rc == 2)
561 goto out_end;
562 return ide_stopped;
563 }
564 }
565
566 /* using dma, transfer is complete now */
567 if (dma) {
568 if (dma_error)
569 return ide_error(drive, "dma error", stat);
570 uptodate = 1;
571 goto out_end;
572 }
573
574 ide_read_bcount_and_ireason(drive, &len, &ireason);
575
576 thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
577 if (thislen > len)
578 thislen = len;
579
580 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
581 stat, thislen);
582
583 /* If DRQ is clear, the command has completed. */
584 if ((stat & ATA_DRQ) == 0) {
585 if (rq->cmd_type == REQ_TYPE_FS) {
586 /*
587 * If we're not done reading/writing, complain.
588 * Otherwise, complete the command normally.
589 */
590 uptodate = 1;
591 if (cmd->nleft > 0) {
592 printk(KERN_ERR PFX "%s: %s: data underrun "
593 "(%u bytes)\n", drive->name, __func__,
594 cmd->nleft);
595 if (!write)
596 rq->cmd_flags |= REQ_FAILED;
597 uptodate = 0;
598 }
599 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
600 ide_cd_request_sense_fixup(drive, cmd);
601
602 uptodate = cmd->nleft ? 0 : 1;
603
604 /*
605 * suck out the remaining bytes from the drive in an
606 * attempt to complete the data xfer. (see BZ#13399)
607 */
608 if (!(stat & ATA_ERR) && !uptodate && thislen) {
609 ide_pio_bytes(drive, cmd, write, thislen);
610 uptodate = cmd->nleft ? 0 : 1;
611 }
612
613 if (!uptodate)
614 rq->cmd_flags |= REQ_FAILED;
615 }
616 goto out_end;
617 }
618
619 rc = ide_check_ireason(drive, rq, len, ireason, write);
620 if (rc)
621 goto out_end;
622
623 cmd->last_xfer_len = 0;
624
625 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
626 "ireason: 0x%x",
627 rq->cmd_type, ireason);
628
629 /* transfer data */
630 while (thislen > 0) {
631 int blen = min_t(int, thislen, cmd->nleft);
632
633 if (cmd->nleft == 0)
634 break;
635
636 ide_pio_bytes(drive, cmd, write, blen);
637 cmd->last_xfer_len += blen;
638
639 thislen -= blen;
640 len -= blen;
641
642 if (sense && write == 0)
643 rq->sense_len += blen;
644 }
645
646 /* pad, if necessary */
647 if (len > 0) {
648 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
649 ide_pad_transfer(drive, write, len);
650 else {
651 printk(KERN_ERR PFX "%s: confused, missing data\n",
652 drive->name);
653 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
654 }
655 }
656
657 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
658 timeout = rq->timeout;
659 } else {
660 timeout = ATAPI_WAIT_PC;
661 if (rq->cmd_type != REQ_TYPE_FS)
662 expiry = ide_cd_expiry;
663 }
664
665 hwif->expiry = expiry;
666 ide_set_handler(drive, cdrom_newpc_intr, timeout);
667 return ide_started;
668
669 out_end:
670 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
671 rq->resid_len = 0;
672 blk_end_request_all(rq, 0);
673 hwif->rq = NULL;
674 } else {
675 if (sense && uptodate)
676 ide_cd_complete_failed_rq(drive, rq);
677
678 if (rq->cmd_type == REQ_TYPE_FS) {
679 if (cmd->nleft == 0)
680 uptodate = 1;
681 } else {
682 if (uptodate <= 0 && rq->errors == 0)
683 rq->errors = -EIO;
684 }
685
686 if (uptodate == 0 && rq->bio)
687 if (ide_cd_error_cmd(drive, cmd))
688 return ide_stopped;
689
690 /* make sure it's fully ended */
691 if (rq->cmd_type != REQ_TYPE_FS) {
692 rq->resid_len -= cmd->nbytes - cmd->nleft;
693 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
694 rq->resid_len += cmd->last_xfer_len;
695 }
696
697 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
698
699 if (sense && rc == 2)
700 ide_error(drive, "request sense failure", stat);
701 }
702 return ide_stopped;
703 }
704
705 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
706 {
707 struct cdrom_info *cd = drive->driver_data;
708 struct request_queue *q = drive->queue;
709 int write = rq_data_dir(rq) == WRITE;
710 unsigned short sectors_per_frame =
711 queue_logical_block_size(q) >> SECTOR_BITS;
712
713 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
714 "secs_per_frame: %u",
715 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
716
717 if (write) {
718 /* disk has become write protected */
719 if (get_disk_ro(cd->disk))
720 return ide_stopped;
721 } else {
722 /*
723 * We may be retrying this request after an error. Fix up any
724 * weirdness which might be present in the request packet.
725 */
726 q->prep_rq_fn(q, rq);
727 }
728
729 /* fs requests *must* be hardware frame aligned */
730 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
731 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
732 return ide_stopped;
733
734 /* use DMA, if possible */
735 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
736
737 if (write)
738 cd->devinfo.media_written = 1;
739
740 rq->timeout = ATAPI_WAIT_PC;
741
742 return ide_started;
743 }
744
745 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
746 {
747
748 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
749 rq->cmd[0], rq->cmd_type);
750
751 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
752 rq->cmd_flags |= REQ_QUIET;
753 else
754 rq->cmd_flags &= ~REQ_FAILED;
755
756 drive->dma = 0;
757
758 /* sg request */
759 if (rq->bio) {
760 struct request_queue *q = drive->queue;
761 char *buf = bio_data(rq->bio);
762 unsigned int alignment;
763
764 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
765
766 /*
767 * check if dma is safe
768 *
769 * NOTE! The "len" and "addr" checks should possibly have
770 * separate masks.
771 */
772 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
773 if ((unsigned long)buf & alignment
774 || blk_rq_bytes(rq) & q->dma_pad_mask
775 || object_is_on_stack(buf))
776 drive->dma = 0;
777 }
778 }
779
780 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
781 sector_t block)
782 {
783 struct ide_cmd cmd;
784 int uptodate = 0, nsectors;
785
786 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
787 rq->cmd[0], (unsigned long long)block);
788
789 if (drive->debug_mask & IDE_DBG_RQ)
790 blk_dump_rq_flags(rq, "ide_cd_do_request");
791
792 switch (rq->cmd_type) {
793 case REQ_TYPE_FS:
794 if (cdrom_start_rw(drive, rq) == ide_stopped)
795 goto out_end;
796 break;
797 case REQ_TYPE_SENSE:
798 case REQ_TYPE_BLOCK_PC:
799 case REQ_TYPE_ATA_PC:
800 if (!rq->timeout)
801 rq->timeout = ATAPI_WAIT_PC;
802
803 cdrom_do_block_pc(drive, rq);
804 break;
805 case REQ_TYPE_SPECIAL:
806 /* right now this can only be a reset... */
807 uptodate = 1;
808 goto out_end;
809 default:
810 BUG();
811 }
812
813 /* prepare sense request for this command */
814 ide_prep_sense(drive, rq);
815
816 memset(&cmd, 0, sizeof(cmd));
817
818 if (rq_data_dir(rq))
819 cmd.tf_flags |= IDE_TFLAG_WRITE;
820
821 cmd.rq = rq;
822
823 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
824 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
825 ide_map_sg(drive, &cmd);
826 }
827
828 return ide_issue_pc(drive, &cmd);
829 out_end:
830 nsectors = blk_rq_sectors(rq);
831
832 if (nsectors == 0)
833 nsectors = 1;
834
835 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
836
837 return ide_stopped;
838 }
839
840 /*
841 * Ioctl handling.
842 *
843 * Routines which queue packet commands take as a final argument a pointer to a
844 * request_sense struct. If execution of the command results in an error with a
845 * CHECK CONDITION status, this structure will be filled with the results of the
846 * subsequent request sense command. The pointer can also be NULL, in which case
847 * no sense information is returned.
848 */
849 static void msf_from_bcd(struct atapi_msf *msf)
850 {
851 msf->minute = bcd2bin(msf->minute);
852 msf->second = bcd2bin(msf->second);
853 msf->frame = bcd2bin(msf->frame);
854 }
855
856 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
857 {
858 struct cdrom_info *info = drive->driver_data;
859 struct cdrom_device_info *cdi = &info->devinfo;
860 unsigned char cmd[BLK_MAX_CDB];
861
862 ide_debug_log(IDE_DBG_FUNC, "enter");
863
864 memset(cmd, 0, BLK_MAX_CDB);
865 cmd[0] = GPCMD_TEST_UNIT_READY;
866
867 /*
868 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
869 * instead of supporting the LOAD_UNLOAD opcode.
870 */
871 cmd[7] = cdi->sanyo_slot % 3;
872
873 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
874 }
875
876 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
877 unsigned long *sectors_per_frame,
878 struct request_sense *sense)
879 {
880 struct {
881 __be32 lba;
882 __be32 blocklen;
883 } capbuf;
884
885 int stat;
886 unsigned char cmd[BLK_MAX_CDB];
887 unsigned len = sizeof(capbuf);
888 u32 blocklen;
889
890 ide_debug_log(IDE_DBG_FUNC, "enter");
891
892 memset(cmd, 0, BLK_MAX_CDB);
893 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
894
895 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
896 REQ_QUIET);
897 if (stat)
898 return stat;
899
900 /*
901 * Sanity check the given block size, in so far as making
902 * sure the sectors_per_frame we give to the caller won't
903 * end up being bogus.
904 */
905 blocklen = be32_to_cpu(capbuf.blocklen);
906 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
907 switch (blocklen) {
908 case 512:
909 case 1024:
910 case 2048:
911 case 4096:
912 break;
913 default:
914 printk_once(KERN_ERR PFX "%s: weird block size %u; "
915 "setting default block size to 2048\n",
916 drive->name, blocklen);
917 blocklen = 2048;
918 break;
919 }
920
921 *capacity = 1 + be32_to_cpu(capbuf.lba);
922 *sectors_per_frame = blocklen >> SECTOR_BITS;
923
924 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
925 *capacity, *sectors_per_frame);
926
927 return 0;
928 }
929
930 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
931 int format, char *buf, int buflen,
932 struct request_sense *sense)
933 {
934 unsigned char cmd[BLK_MAX_CDB];
935
936 ide_debug_log(IDE_DBG_FUNC, "enter");
937
938 memset(cmd, 0, BLK_MAX_CDB);
939
940 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
941 cmd[6] = trackno;
942 cmd[7] = (buflen >> 8);
943 cmd[8] = (buflen & 0xff);
944 cmd[9] = (format << 6);
945
946 if (msf_flag)
947 cmd[1] = 2;
948
949 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
950 }
951
952 /* Try to read the entire TOC for the disk into our internal buffer. */
953 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
954 {
955 int stat, ntracks, i;
956 struct cdrom_info *info = drive->driver_data;
957 struct cdrom_device_info *cdi = &info->devinfo;
958 struct atapi_toc *toc = info->toc;
959 struct {
960 struct atapi_toc_header hdr;
961 struct atapi_toc_entry ent;
962 } ms_tmp;
963 long last_written;
964 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
965
966 ide_debug_log(IDE_DBG_FUNC, "enter");
967
968 if (toc == NULL) {
969 /* try to allocate space */
970 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
971 if (toc == NULL) {
972 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
973 drive->name);
974 return -ENOMEM;
975 }
976 info->toc = toc;
977 }
978
979 /*
980 * Check to see if the existing data is still valid. If it is,
981 * just return.
982 */
983 (void) cdrom_check_status(drive, sense);
984
985 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
986 return 0;
987
988 /* try to get the total cdrom capacity and sector size */
989 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
990 sense);
991 if (stat)
992 toc->capacity = 0x1fffff;
993
994 set_capacity(info->disk, toc->capacity * sectors_per_frame);
995 /* save a private copy of the TOC capacity for error handling */
996 drive->probed_capacity = toc->capacity * sectors_per_frame;
997
998 blk_queue_logical_block_size(drive->queue,
999 sectors_per_frame << SECTOR_BITS);
1000
1001 /* first read just the header, so we know how long the TOC is */
1002 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1003 sizeof(struct atapi_toc_header), sense);
1004 if (stat)
1005 return stat;
1006
1007 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1008 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1009 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1010 }
1011
1012 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1013 if (ntracks <= 0)
1014 return -EIO;
1015 if (ntracks > MAX_TRACKS)
1016 ntracks = MAX_TRACKS;
1017
1018 /* now read the whole schmeer */
1019 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1020 (char *)&toc->hdr,
1021 sizeof(struct atapi_toc_header) +
1022 (ntracks + 1) *
1023 sizeof(struct atapi_toc_entry), sense);
1024
1025 if (stat && toc->hdr.first_track > 1) {
1026 /*
1027 * Cds with CDI tracks only don't have any TOC entries, despite
1028 * of this the returned values are
1029 * first_track == last_track = number of CDI tracks + 1,
1030 * so that this case is indistinguishable from the same layout
1031 * plus an additional audio track. If we get an error for the
1032 * regular case, we assume a CDI without additional audio
1033 * tracks. In this case the readable TOC is empty (CDI tracks
1034 * are not included) and only holds the Leadout entry.
1035 *
1036 * Heiko Eißfeldt.
1037 */
1038 ntracks = 0;
1039 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1040 (char *)&toc->hdr,
1041 sizeof(struct atapi_toc_header) +
1042 (ntracks + 1) *
1043 sizeof(struct atapi_toc_entry),
1044 sense);
1045 if (stat)
1046 return stat;
1047
1048 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1049 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1050 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1051 } else {
1052 toc->hdr.first_track = CDROM_LEADOUT;
1053 toc->hdr.last_track = CDROM_LEADOUT;
1054 }
1055 }
1056
1057 if (stat)
1058 return stat;
1059
1060 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1061
1062 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1063 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1064 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1065 }
1066
1067 for (i = 0; i <= ntracks; i++) {
1068 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1069 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1070 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1071 msf_from_bcd(&toc->ent[i].addr.msf);
1072 }
1073 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1074 toc->ent[i].addr.msf.second,
1075 toc->ent[i].addr.msf.frame);
1076 }
1077
1078 if (toc->hdr.first_track != CDROM_LEADOUT) {
1079 /* read the multisession information */
1080 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1081 sizeof(ms_tmp), sense);
1082 if (stat)
1083 return stat;
1084
1085 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1086 } else {
1087 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1088 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1089 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1090 }
1091
1092 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1093 /* re-read multisession information using MSF format */
1094 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1095 sizeof(ms_tmp), sense);
1096 if (stat)
1097 return stat;
1098
1099 msf_from_bcd(&ms_tmp.ent.addr.msf);
1100 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1101 ms_tmp.ent.addr.msf.second,
1102 ms_tmp.ent.addr.msf.frame);
1103 }
1104
1105 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1106
1107 /* now try to get the total cdrom capacity */
1108 stat = cdrom_get_last_written(cdi, &last_written);
1109 if (!stat && (last_written > toc->capacity)) {
1110 toc->capacity = last_written;
1111 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1112 drive->probed_capacity = toc->capacity * sectors_per_frame;
1113 }
1114
1115 /* Remember that we've read this stuff. */
1116 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1117
1118 return 0;
1119 }
1120
1121 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1122 {
1123 struct cdrom_info *info = drive->driver_data;
1124 struct cdrom_device_info *cdi = &info->devinfo;
1125 struct packet_command cgc;
1126 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1127
1128 ide_debug_log(IDE_DBG_FUNC, "enter");
1129
1130 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1131 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1132
1133 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1134 do {
1135 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1136 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1137 if (!stat)
1138 break;
1139 } while (--attempts);
1140 return stat;
1141 }
1142
1143 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1144 {
1145 struct cdrom_info *cd = drive->driver_data;
1146 u16 curspeed, maxspeed;
1147
1148 ide_debug_log(IDE_DBG_FUNC, "enter");
1149
1150 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1151 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1152 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1153 } else {
1154 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1155 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1156 }
1157
1158 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1159 curspeed, maxspeed);
1160
1161 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1162 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1163 }
1164
1165 #define IDE_CD_CAPABILITIES \
1166 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1167 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1168 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1169 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1170 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1171
1172 static struct cdrom_device_ops ide_cdrom_dops = {
1173 .open = ide_cdrom_open_real,
1174 .release = ide_cdrom_release_real,
1175 .drive_status = ide_cdrom_drive_status,
1176 .media_changed = ide_cdrom_check_media_change_real,
1177 .tray_move = ide_cdrom_tray_move,
1178 .lock_door = ide_cdrom_lock_door,
1179 .select_speed = ide_cdrom_select_speed,
1180 .get_last_session = ide_cdrom_get_last_session,
1181 .get_mcn = ide_cdrom_get_mcn,
1182 .reset = ide_cdrom_reset,
1183 .audio_ioctl = ide_cdrom_audio_ioctl,
1184 .capability = IDE_CD_CAPABILITIES,
1185 .generic_packet = ide_cdrom_packet,
1186 };
1187
1188 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1189 {
1190 struct cdrom_info *info = drive->driver_data;
1191 struct cdrom_device_info *devinfo = &info->devinfo;
1192
1193 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1194
1195 devinfo->ops = &ide_cdrom_dops;
1196 devinfo->speed = info->current_speed;
1197 devinfo->capacity = nslots;
1198 devinfo->handle = drive;
1199 strcpy(devinfo->name, drive->name);
1200
1201 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1202 devinfo->mask |= CDC_SELECT_SPEED;
1203
1204 devinfo->disk = info->disk;
1205 return register_cdrom(devinfo);
1206 }
1207
1208 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1209 {
1210 struct cdrom_info *cd = drive->driver_data;
1211 struct cdrom_device_info *cdi = &cd->devinfo;
1212 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1213 mechtype_t mechtype;
1214 int nslots = 1;
1215
1216 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1217 drive->media, drive->atapi_flags);
1218
1219 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1220 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1221 CDC_MO_DRIVE | CDC_RAM);
1222
1223 if (drive->media == ide_optical) {
1224 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1225 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1226 drive->name);
1227 return nslots;
1228 }
1229
1230 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1231 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1232 cdi->mask &= ~CDC_PLAY_AUDIO;
1233 return nslots;
1234 }
1235
1236 /*
1237 * We have to cheat a little here. the packet will eventually be queued
1238 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1239 * Since this device hasn't been registered with the Uniform layer yet,
1240 * it can't do this. Same goes for cdi->ops.
1241 */
1242 cdi->handle = drive;
1243 cdi->ops = &ide_cdrom_dops;
1244
1245 if (ide_cdrom_get_capabilities(drive, buf))
1246 return 0;
1247
1248 if ((buf[8 + 6] & 0x01) == 0)
1249 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1250 if (buf[8 + 6] & 0x08)
1251 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1252 if (buf[8 + 3] & 0x01)
1253 cdi->mask &= ~CDC_CD_R;
1254 if (buf[8 + 3] & 0x02)
1255 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1256 if (buf[8 + 2] & 0x38)
1257 cdi->mask &= ~CDC_DVD;
1258 if (buf[8 + 3] & 0x20)
1259 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1260 if (buf[8 + 3] & 0x10)
1261 cdi->mask &= ~CDC_DVD_R;
1262 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1263 cdi->mask &= ~CDC_PLAY_AUDIO;
1264
1265 mechtype = buf[8 + 6] >> 5;
1266 if (mechtype == mechtype_caddy ||
1267 mechtype == mechtype_popup ||
1268 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1269 cdi->mask |= CDC_CLOSE_TRAY;
1270
1271 if (cdi->sanyo_slot > 0) {
1272 cdi->mask &= ~CDC_SELECT_DISC;
1273 nslots = 3;
1274 } else if (mechtype == mechtype_individual_changer ||
1275 mechtype == mechtype_cartridge_changer) {
1276 nslots = cdrom_number_of_slots(cdi);
1277 if (nslots > 1)
1278 cdi->mask &= ~CDC_SELECT_DISC;
1279 }
1280
1281 ide_cdrom_update_speed(drive, buf);
1282
1283 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1284
1285 /* don't print speed if the drive reported 0 */
1286 if (cd->max_speed)
1287 printk(KERN_CONT " %dX", cd->max_speed);
1288
1289 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1290
1291 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1292 printk(KERN_CONT " DVD%s%s",
1293 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1294 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1295
1296 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1297 printk(KERN_CONT " CD%s%s",
1298 (cdi->mask & CDC_CD_R) ? "" : "-R",
1299 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1300
1301 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1302 printk(KERN_CONT " changer w/%d slots", nslots);
1303 else
1304 printk(KERN_CONT " drive");
1305
1306 printk(KERN_CONT ", %dkB Cache\n",
1307 be16_to_cpup((__be16 *)&buf[8 + 12]));
1308
1309 return nslots;
1310 }
1311
1312 /* standard prep_rq_fn that builds 10 byte cmds */
1313 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1314 {
1315 int hard_sect = queue_logical_block_size(q);
1316 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1317 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1318
1319 memset(rq->cmd, 0, BLK_MAX_CDB);
1320
1321 if (rq_data_dir(rq) == READ)
1322 rq->cmd[0] = GPCMD_READ_10;
1323 else
1324 rq->cmd[0] = GPCMD_WRITE_10;
1325
1326 /*
1327 * fill in lba
1328 */
1329 rq->cmd[2] = (block >> 24) & 0xff;
1330 rq->cmd[3] = (block >> 16) & 0xff;
1331 rq->cmd[4] = (block >> 8) & 0xff;
1332 rq->cmd[5] = block & 0xff;
1333
1334 /*
1335 * and transfer length
1336 */
1337 rq->cmd[7] = (blocks >> 8) & 0xff;
1338 rq->cmd[8] = blocks & 0xff;
1339 rq->cmd_len = 10;
1340 return BLKPREP_OK;
1341 }
1342
1343 /*
1344 * Most of the SCSI commands are supported directly by ATAPI devices.
1345 * This transform handles the few exceptions.
1346 */
1347 static int ide_cdrom_prep_pc(struct request *rq)
1348 {
1349 u8 *c = rq->cmd;
1350
1351 /* transform 6-byte read/write commands to the 10-byte version */
1352 if (c[0] == READ_6 || c[0] == WRITE_6) {
1353 c[8] = c[4];
1354 c[5] = c[3];
1355 c[4] = c[2];
1356 c[3] = c[1] & 0x1f;
1357 c[2] = 0;
1358 c[1] &= 0xe0;
1359 c[0] += (READ_10 - READ_6);
1360 rq->cmd_len = 10;
1361 return BLKPREP_OK;
1362 }
1363
1364 /*
1365 * it's silly to pretend we understand 6-byte sense commands, just
1366 * reject with ILLEGAL_REQUEST and the caller should take the
1367 * appropriate action
1368 */
1369 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1370 rq->errors = ILLEGAL_REQUEST;
1371 return BLKPREP_KILL;
1372 }
1373
1374 return BLKPREP_OK;
1375 }
1376
1377 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1378 {
1379 if (rq->cmd_type == REQ_TYPE_FS)
1380 return ide_cdrom_prep_fs(q, rq);
1381 else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1382 return ide_cdrom_prep_pc(rq);
1383
1384 return 0;
1385 }
1386
1387 struct cd_list_entry {
1388 const char *id_model;
1389 const char *id_firmware;
1390 unsigned int cd_flags;
1391 };
1392
1393 #ifdef CONFIG_IDE_PROC_FS
1394 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1395 {
1396 unsigned long capacity, sectors_per_frame;
1397
1398 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1399 return 0;
1400
1401 return capacity * sectors_per_frame;
1402 }
1403
1404 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1405 {
1406 ide_drive_t *drive = m->private;
1407
1408 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1409 return 0;
1410 }
1411
1412 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1413 {
1414 return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1415 }
1416
1417 static const struct file_operations idecd_capacity_proc_fops = {
1418 .owner = THIS_MODULE,
1419 .open = idecd_capacity_proc_open,
1420 .read = seq_read,
1421 .llseek = seq_lseek,
1422 .release = single_release,
1423 };
1424
1425 static ide_proc_entry_t idecd_proc[] = {
1426 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1427 {}
1428 };
1429
1430 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1431 {
1432 return idecd_proc;
1433 }
1434
1435 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1436 {
1437 return NULL;
1438 }
1439 #endif
1440
1441 static const struct cd_list_entry ide_cd_quirks_list[] = {
1442 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1443 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1444 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1445 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1446 IDE_AFLAG_PRE_ATAPI12, },
1447 /* Vertos 300, some versions of this drive like to talk BCD. */
1448 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1449 /* Vertos 600 ESD. */
1450 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1451 /*
1452 * Sanyo 3 CD changer uses a non-standard command for CD changing
1453 * (by default standard ATAPI support for CD changers is used).
1454 */
1455 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1456 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1457 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1458 /* Stingray 8X CD-ROM. */
1459 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1460 /*
1461 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1462 * mode sense page capabilities size, but older drives break.
1463 */
1464 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1465 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1466 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1467 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1468 /*
1469 * Some drives used by Apple don't advertise audio play
1470 * but they do support reading TOC & audio datas.
1471 */
1472 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1473 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1474 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1475 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1476 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1477 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1478 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1479 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1480 { NULL, NULL, 0 }
1481 };
1482
1483 static unsigned int ide_cd_flags(u16 *id)
1484 {
1485 const struct cd_list_entry *cle = ide_cd_quirks_list;
1486
1487 while (cle->id_model) {
1488 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1489 (cle->id_firmware == NULL ||
1490 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1491 return cle->cd_flags;
1492 cle++;
1493 }
1494
1495 return 0;
1496 }
1497
1498 static int ide_cdrom_setup(ide_drive_t *drive)
1499 {
1500 struct cdrom_info *cd = drive->driver_data;
1501 struct cdrom_device_info *cdi = &cd->devinfo;
1502 struct request_queue *q = drive->queue;
1503 u16 *id = drive->id;
1504 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1505 int nslots;
1506
1507 ide_debug_log(IDE_DBG_PROBE, "enter");
1508
1509 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1510 blk_queue_dma_alignment(q, 31);
1511 blk_queue_update_dma_pad(q, 15);
1512
1513 q->unplug_delay = max((1 * HZ) / 1000, 1);
1514
1515 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1516 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1517
1518 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1519 fw_rev[4] == '1' && fw_rev[6] <= '2')
1520 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1521 IDE_AFLAG_TOCADDR_AS_BCD);
1522 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1523 fw_rev[4] == '1' && fw_rev[6] <= '2')
1524 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1525 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1526 /* 3 => use CD in slot 0 */
1527 cdi->sanyo_slot = 3;
1528
1529 nslots = ide_cdrom_probe_capabilities(drive);
1530
1531 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1532
1533 if (ide_cdrom_register(drive, nslots)) {
1534 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1535 " cdrom driver.\n", drive->name, __func__);
1536 cd->devinfo.handle = NULL;
1537 return 1;
1538 }
1539
1540 ide_proc_register_driver(drive, cd->driver);
1541 return 0;
1542 }
1543
1544 static void ide_cd_remove(ide_drive_t *drive)
1545 {
1546 struct cdrom_info *info = drive->driver_data;
1547
1548 ide_debug_log(IDE_DBG_FUNC, "enter");
1549
1550 ide_proc_unregister_driver(drive, info->driver);
1551 device_del(&info->dev);
1552 del_gendisk(info->disk);
1553
1554 mutex_lock(&idecd_ref_mutex);
1555 put_device(&info->dev);
1556 mutex_unlock(&idecd_ref_mutex);
1557 }
1558
1559 static void ide_cd_release(struct device *dev)
1560 {
1561 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1562 struct cdrom_device_info *devinfo = &info->devinfo;
1563 ide_drive_t *drive = info->drive;
1564 struct gendisk *g = info->disk;
1565
1566 ide_debug_log(IDE_DBG_FUNC, "enter");
1567
1568 kfree(info->toc);
1569 if (devinfo->handle == drive)
1570 unregister_cdrom(devinfo);
1571 drive->driver_data = NULL;
1572 blk_queue_prep_rq(drive->queue, NULL);
1573 g->private_data = NULL;
1574 put_disk(g);
1575 kfree(info);
1576 }
1577
1578 static int ide_cd_probe(ide_drive_t *);
1579
1580 static struct ide_driver ide_cdrom_driver = {
1581 .gen_driver = {
1582 .owner = THIS_MODULE,
1583 .name = "ide-cdrom",
1584 .bus = &ide_bus_type,
1585 },
1586 .probe = ide_cd_probe,
1587 .remove = ide_cd_remove,
1588 .version = IDECD_VERSION,
1589 .do_request = ide_cd_do_request,
1590 #ifdef CONFIG_IDE_PROC_FS
1591 .proc_entries = ide_cd_proc_entries,
1592 .proc_devsets = ide_cd_proc_devsets,
1593 #endif
1594 };
1595
1596 static int idecd_open(struct block_device *bdev, fmode_t mode)
1597 {
1598 struct cdrom_info *info;
1599 int rc = -ENXIO;
1600
1601 lock_kernel();
1602 info = ide_cd_get(bdev->bd_disk);
1603 if (!info)
1604 goto out;
1605
1606 rc = cdrom_open(&info->devinfo, bdev, mode);
1607 if (rc < 0)
1608 ide_cd_put(info);
1609 out:
1610 unlock_kernel();
1611 return rc;
1612 }
1613
1614 static int idecd_release(struct gendisk *disk, fmode_t mode)
1615 {
1616 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1617
1618 lock_kernel();
1619 cdrom_release(&info->devinfo, mode);
1620
1621 ide_cd_put(info);
1622 unlock_kernel();
1623
1624 return 0;
1625 }
1626
1627 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1628 {
1629 struct packet_command cgc;
1630 char buffer[16];
1631 int stat;
1632 char spindown;
1633
1634 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1635 return -EFAULT;
1636
1637 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1638
1639 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1640 if (stat)
1641 return stat;
1642
1643 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1644 return cdrom_mode_select(cdi, &cgc);
1645 }
1646
1647 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1648 {
1649 struct packet_command cgc;
1650 char buffer[16];
1651 int stat;
1652 char spindown;
1653
1654 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1655
1656 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1657 if (stat)
1658 return stat;
1659
1660 spindown = buffer[11] & 0x0f;
1661 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1662 return -EFAULT;
1663 return 0;
1664 }
1665
1666 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1667 unsigned int cmd, unsigned long arg)
1668 {
1669 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1670 int err;
1671
1672 switch (cmd) {
1673 case CDROMSETSPINDOWN:
1674 return idecd_set_spindown(&info->devinfo, arg);
1675 case CDROMGETSPINDOWN:
1676 return idecd_get_spindown(&info->devinfo, arg);
1677 default:
1678 break;
1679 }
1680
1681 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1682 if (err == -EINVAL)
1683 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1684
1685 return err;
1686 }
1687
1688 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1689 unsigned int cmd, unsigned long arg)
1690 {
1691 int ret;
1692
1693 lock_kernel();
1694 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1695 unlock_kernel();
1696
1697 return ret;
1698 }
1699
1700
1701 static int idecd_media_changed(struct gendisk *disk)
1702 {
1703 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1704 return cdrom_media_changed(&info->devinfo);
1705 }
1706
1707 static int idecd_revalidate_disk(struct gendisk *disk)
1708 {
1709 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1710 struct request_sense sense;
1711
1712 ide_cd_read_toc(info->drive, &sense);
1713
1714 return 0;
1715 }
1716
1717 static const struct block_device_operations idecd_ops = {
1718 .owner = THIS_MODULE,
1719 .open = idecd_open,
1720 .release = idecd_release,
1721 .ioctl = idecd_ioctl,
1722 .media_changed = idecd_media_changed,
1723 .revalidate_disk = idecd_revalidate_disk
1724 };
1725
1726 /* module options */
1727 static unsigned long debug_mask;
1728 module_param(debug_mask, ulong, 0644);
1729
1730 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1731
1732 static int ide_cd_probe(ide_drive_t *drive)
1733 {
1734 struct cdrom_info *info;
1735 struct gendisk *g;
1736 struct request_sense sense;
1737
1738 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1739 drive->driver_req, drive->media);
1740
1741 if (!strstr("ide-cdrom", drive->driver_req))
1742 goto failed;
1743
1744 if (drive->media != ide_cdrom && drive->media != ide_optical)
1745 goto failed;
1746
1747 drive->debug_mask = debug_mask;
1748 drive->irq_handler = cdrom_newpc_intr;
1749
1750 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1751 if (info == NULL) {
1752 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1753 drive->name);
1754 goto failed;
1755 }
1756
1757 g = alloc_disk(1 << PARTN_BITS);
1758 if (!g)
1759 goto out_free_cd;
1760
1761 ide_init_disk(g, drive);
1762
1763 info->dev.parent = &drive->gendev;
1764 info->dev.release = ide_cd_release;
1765 dev_set_name(&info->dev, dev_name(&drive->gendev));
1766
1767 if (device_register(&info->dev))
1768 goto out_free_disk;
1769
1770 info->drive = drive;
1771 info->driver = &ide_cdrom_driver;
1772 info->disk = g;
1773
1774 g->private_data = &info->driver;
1775
1776 drive->driver_data = info;
1777
1778 g->minors = 1;
1779 g->driverfs_dev = &drive->gendev;
1780 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1781 if (ide_cdrom_setup(drive)) {
1782 put_device(&info->dev);
1783 goto failed;
1784 }
1785
1786 ide_cd_read_toc(drive, &sense);
1787 g->fops = &idecd_ops;
1788 g->flags |= GENHD_FL_REMOVABLE;
1789 add_disk(g);
1790 return 0;
1791
1792 out_free_disk:
1793 put_disk(g);
1794 out_free_cd:
1795 kfree(info);
1796 failed:
1797 return -ENODEV;
1798 }
1799
1800 static void __exit ide_cdrom_exit(void)
1801 {
1802 driver_unregister(&ide_cdrom_driver.gen_driver);
1803 }
1804
1805 static int __init ide_cdrom_init(void)
1806 {
1807 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1808 return driver_register(&ide_cdrom_driver.gen_driver);
1809 }
1810
1811 MODULE_ALIAS("ide:*m-cdrom*");
1812 MODULE_ALIAS("ide-cd");
1813 module_init(ide_cdrom_init);
1814 module_exit(ide_cdrom_exit);
1815 MODULE_LICENSE("GPL");
Tomato firmware and modifications.