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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.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/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 get_device(&cd->dev);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 put_device(&cd->dev);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 switch (sense->sense_key) {
106 case NO_SENSE:
107 case RECOVERED_ERROR:
108 break;
109 case NOT_READY:
110 /*
111 * don't care about tray state messages for e.g. capacity
112 * commands or in-progress or becoming ready
113 */
114 if (sense->asc == 0x3a || sense->asc == 0x04)
115 break;
116 log = 1;
117 break;
118 case ILLEGAL_REQUEST:
119 /*
120 * don't log START_STOP unit with LoEj set, since we cannot
121 * reliably check if drive can auto-close
122 */
123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124 break;
125 log = 1;
126 break;
127 case UNIT_ATTENTION:
128 /*
129 * Make good and sure we've seen this potential media change.
130 * Some drives (i.e. Creative) fail to present the correct sense
131 * key in the error register.
132 */
133 cdrom_saw_media_change(drive);
134 break;
135 default:
136 log = 1;
137 break;
138 }
139 return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143 struct request *failed_command,
144 struct request_sense *sense)
145 {
146 unsigned long sector;
147 unsigned long bio_sectors;
148 struct cdrom_info *info = drive->driver_data;
149
150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151 sense->error_code, sense->sense_key);
152
153 if (failed_command)
154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155 failed_command->cmd[0]);
156
157 if (!cdrom_log_sense(drive, failed_command, sense))
158 return;
159
160 /*
161 * If a read toc is executed for a CD-R or CD-RW medium where the first
162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163 * confusing error)
164 */
165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167 return;
168
169 /* current error */
170 if (sense->error_code == 0x70) {
171 switch (sense->sense_key) {
172 case MEDIUM_ERROR:
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
175 if (!sense->valid)
176 break;
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
179 break;
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
184
185 if (queue_logical_block_size(drive->queue) == 2048)
186 /* device sector size is 2K */
187 sector <<= 2;
188
189 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190 sector &= ~(bio_sectors - 1);
191
192 /*
193 * The SCSI specification allows for the value
194 * returned by READ CAPACITY to be up to 75 2K
195 * sectors past the last readable block.
196 * Therefore, if we hit a medium error within the
197 * last 75 2K sectors, we decrease the saved size
198 * value.
199 */
200 if (sector < get_capacity(info->disk) &&
201 drive->probed_capacity - sector < 4 * 75)
202 set_capacity(info->disk, sector);
203 }
204 }
205
206 ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
210 {
211 /*
212 * For REQ_TYPE_SENSE, "rq->special" points to the original
213 * failed request. Also, the sense data should be read
214 * directly from rq which might be different from the original
215 * sense buffer if it got copied during mapping.
216 */
217 struct request *failed = (struct request *)rq->special;
218 void *sense = bio_data(rq->bio);
219
220 if (failed) {
221 if (failed->sense) {
222 /*
223 * Sense is always read into drive->sense_data.
224 * Copy back if the failed request has its
225 * sense pointer set.
226 */
227 memcpy(failed->sense, sense, 18);
228 sense = failed->sense;
229 failed->sense_len = rq->sense_len;
230 }
231 cdrom_analyze_sense_data(drive, failed, sense);
232
233 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
234 BUG();
235 } else
236 cdrom_analyze_sense_data(drive, NULL, sense);
237 }
238
239
240 /*
241 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
242 * while flushing data from cache.
243 *
244 * returns: 0 failed (write timeout expired)
245 * 1 success
246 */
247 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
248 {
249
250 struct cdrom_info *info = drive->driver_data;
251
252 if (!rq->errors)
253 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
254
255 rq->errors = 1;
256
257 if (time_after(jiffies, info->write_timeout))
258 return 0;
259 else {
260 struct request_queue *q = drive->queue;
261 unsigned long flags;
262
263 /*
264 * take a breather relying on the unplug timer to kick us again
265 */
266
267 spin_lock_irqsave(q->queue_lock, flags);
268 blk_plug_device(q);
269 spin_unlock_irqrestore(q->queue_lock, flags);
270
271 return 1;
272 }
273 }
274
275 /**
276 * Returns:
277 * 0: if the request should be continued.
278 * 1: if the request will be going through error recovery.
279 * 2: if the request should be ended.
280 */
281 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
282 {
283 ide_hwif_t *hwif = drive->hwif;
284 struct request *rq = hwif->rq;
285 int err, sense_key, do_end_request = 0;
286
287 /* get the IDE error register */
288 err = ide_read_error(drive);
289 sense_key = err >> 4;
290
291 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
292 "stat 0x%x",
293 rq->cmd[0], rq->cmd_type, err, stat);
294
295 if (blk_sense_request(rq)) {
296 /*
297 * We got an error trying to get sense info from the drive
298 * (probably while trying to recover from a former error).
299 * Just give up.
300 */
301 rq->cmd_flags |= REQ_FAILED;
302 return 2;
303 }
304
305 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
306 if (blk_pc_request(rq) && !rq->errors)
307 rq->errors = SAM_STAT_CHECK_CONDITION;
308
309 if (blk_noretry_request(rq))
310 do_end_request = 1;
311
312 switch (sense_key) {
313 case NOT_READY:
314 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
315 if (ide_cd_breathe(drive, rq))
316 return 1;
317 } else {
318 cdrom_saw_media_change(drive);
319
320 if (blk_fs_request(rq) && !blk_rq_quiet(rq))
321 printk(KERN_ERR PFX "%s: tray open\n",
322 drive->name);
323 }
324 do_end_request = 1;
325 break;
326 case UNIT_ATTENTION:
327 cdrom_saw_media_change(drive);
328
329 if (blk_fs_request(rq) == 0)
330 return 0;
331
332 /*
333 * Arrange to retry the request but be sure to give up if we've
334 * retried too many times.
335 */
336 if (++rq->errors > ERROR_MAX)
337 do_end_request = 1;
338 break;
339 case ILLEGAL_REQUEST:
340 /*
341 * Don't print error message for this condition -- SFF8090i
342 * indicates that 5/24/00 is the correct response to a request
343 * to close the tray if the drive doesn't have that capability.
344 *
345 * cdrom_log_sense() knows this!
346 */
347 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
348 break;
349 /* fall-through */
350 case DATA_PROTECT:
351 /*
352 * No point in retrying after an illegal request or data
353 * protect error.
354 */
355 if (!blk_rq_quiet(rq))
356 ide_dump_status(drive, "command error", stat);
357 do_end_request = 1;
358 break;
359 case MEDIUM_ERROR:
360 /*
361 * No point in re-trying a zillion times on a bad sector.
362 * If we got here the error is not correctable.
363 */
364 if (!blk_rq_quiet(rq))
365 ide_dump_status(drive, "media error "
366 "(bad sector)", stat);
367 do_end_request = 1;
368 break;
369 case BLANK_CHECK:
370 /* disk appears blank? */
371 if (!blk_rq_quiet(rq))
372 ide_dump_status(drive, "media error (blank)",
373 stat);
374 do_end_request = 1;
375 break;
376 default:
377 if (blk_fs_request(rq) == 0)
378 break;
379 if (err & ~ATA_ABORTED) {
380 /* go to the default handler for other errors */
381 ide_error(drive, "cdrom_decode_status", stat);
382 return 1;
383 } else if (++rq->errors > ERROR_MAX)
384 /* we've racked up too many retries, abort */
385 do_end_request = 1;
386 }
387
388 if (blk_fs_request(rq) == 0) {
389 rq->cmd_flags |= REQ_FAILED;
390 do_end_request = 1;
391 }
392
393 /*
394 * End a request through request sense analysis when we have sense data.
395 * We need this in order to perform end of media processing.
396 */
397 if (do_end_request)
398 goto end_request;
399
400 /* if we got a CHECK_CONDITION status, queue a request sense command */
401 if (stat & ATA_ERR)
402 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
403 return 1;
404
405 end_request:
406 if (stat & ATA_ERR) {
407 hwif->rq = NULL;
408 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
409 } else
410 return 2;
411 }
412
413 /*
414 * Check the contents of the interrupt reason register from the cdrom
415 * and attempt to recover if there are problems. Returns 0 if everything's
416 * ok; nonzero if the request has been terminated.
417 */
418 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
419 int len, int ireason, int rw)
420 {
421 ide_hwif_t *hwif = drive->hwif;
422
423 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
424
425 /*
426 * ireason == 0: the drive wants to receive data from us
427 * ireason == 2: the drive is expecting to transfer data to us
428 */
429 if (ireason == (!rw << 1))
430 return 0;
431 else if (ireason == (rw << 1)) {
432
433 /* whoops... */
434 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
435 drive->name, __func__);
436
437 ide_pad_transfer(drive, rw, len);
438 } else if (rw == 0 && ireason == 1) {
439 /*
440 * Some drives (ASUS) seem to tell us that status info is
441 * available. Just get it and ignore.
442 */
443 (void)hwif->tp_ops->read_status(hwif);
444 return 0;
445 } else {
446 /* drive wants a command packet, or invalid ireason... */
447 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
448 drive->name, __func__, ireason);
449 }
450
451 if (rq->cmd_type == REQ_TYPE_ATA_PC)
452 rq->cmd_flags |= REQ_FAILED;
453
454 return -1;
455 }
456
457 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
458 {
459 struct request *rq = cmd->rq;
460
461 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
462
463 /*
464 * Some of the trailing request sense fields are optional,
465 * and some drives don't send them. Sigh.
466 */
467 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
468 cmd->nleft > 0 && cmd->nleft <= 5)
469 cmd->nleft = 0;
470 }
471
472 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
473 int write, void *buffer, unsigned *bufflen,
474 struct request_sense *sense, int timeout,
475 unsigned int cmd_flags)
476 {
477 struct cdrom_info *info = drive->driver_data;
478 struct request_sense local_sense;
479 int retries = 10;
480 unsigned int flags = 0;
481
482 if (!sense)
483 sense = &local_sense;
484
485 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
486 "cmd_flags: 0x%x",
487 cmd[0], write, timeout, cmd_flags);
488
489 /* start of retry loop */
490 do {
491 struct request *rq;
492 int error;
493
494 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
495
496 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
497 rq->cmd_type = REQ_TYPE_ATA_PC;
498 rq->sense = sense;
499 rq->cmd_flags |= cmd_flags;
500 rq->timeout = timeout;
501 if (buffer) {
502 error = blk_rq_map_kern(drive->queue, rq, buffer,
503 *bufflen, GFP_NOIO);
504 if (error) {
505 blk_put_request(rq);
506 return error;
507 }
508 }
509
510 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
511
512 if (buffer)
513 *bufflen = rq->resid_len;
514
515 flags = rq->cmd_flags;
516 blk_put_request(rq);
517
518 /*
519 * FIXME: we should probably abort/retry or something in case of
520 * failure.
521 */
522 if (flags & REQ_FAILED) {
523 /*
524 * The request failed. Retry if it was due to a unit
525 * attention status (usually means media was changed).
526 */
527 struct request_sense *reqbuf = sense;
528
529 if (reqbuf->sense_key == UNIT_ATTENTION)
530 cdrom_saw_media_change(drive);
531 else if (reqbuf->sense_key == NOT_READY &&
532 reqbuf->asc == 4 && reqbuf->ascq != 4) {
533 /*
534 * The drive is in the process of loading
535 * a disk. Retry, but wait a little to give
536 * the drive time to complete the load.
537 */
538 ssleep(2);
539 } else {
540 /* otherwise, don't retry */
541 retries = 0;
542 }
543 --retries;
544 }
545
546 /* end of retry loop */
547 } while ((flags & REQ_FAILED) && retries >= 0);
548
549 /* return an error if the command failed */
550 return (flags & REQ_FAILED) ? -EIO : 0;
551 }
552
553 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
554 {
555 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
556
557 if (cmd->tf_flags & IDE_TFLAG_WRITE)
558 nr_bytes -= cmd->last_xfer_len;
559
560 if (nr_bytes > 0)
561 ide_complete_rq(drive, 0, nr_bytes);
562 }
563
564 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
565 {
566 ide_hwif_t *hwif = drive->hwif;
567 struct ide_cmd *cmd = &hwif->cmd;
568 struct request *rq = hwif->rq;
569 ide_expiry_t *expiry = NULL;
570 int dma_error = 0, dma, thislen, uptodate = 0;
571 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
572 int sense = blk_sense_request(rq);
573 unsigned int timeout;
574 u16 len;
575 u8 ireason, stat;
576
577 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
578
579 /* check for errors */
580 dma = drive->dma;
581 if (dma) {
582 drive->dma = 0;
583 drive->waiting_for_dma = 0;
584 dma_error = hwif->dma_ops->dma_end(drive);
585 ide_dma_unmap_sg(drive, cmd);
586 if (dma_error) {
587 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
588 write ? "write" : "read");
589 ide_dma_off(drive);
590 }
591 }
592
593 /* check status */
594 stat = hwif->tp_ops->read_status(hwif);
595
596 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
597 rc = cdrom_decode_status(drive, stat);
598 if (rc) {
599 if (rc == 2)
600 goto out_end;
601 return ide_stopped;
602 }
603 }
604
605 /* using dma, transfer is complete now */
606 if (dma) {
607 if (dma_error)
608 return ide_error(drive, "dma error", stat);
609 uptodate = 1;
610 goto out_end;
611 }
612
613 ide_read_bcount_and_ireason(drive, &len, &ireason);
614
615 thislen = blk_fs_request(rq) ? len : cmd->nleft;
616 if (thislen > len)
617 thislen = len;
618
619 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
620 stat, thislen);
621
622 /* If DRQ is clear, the command has completed. */
623 if ((stat & ATA_DRQ) == 0) {
624 if (blk_fs_request(rq)) {
625 /*
626 * If we're not done reading/writing, complain.
627 * Otherwise, complete the command normally.
628 */
629 uptodate = 1;
630 if (cmd->nleft > 0) {
631 printk(KERN_ERR PFX "%s: %s: data underrun "
632 "(%u bytes)\n", drive->name, __func__,
633 cmd->nleft);
634 if (!write)
635 rq->cmd_flags |= REQ_FAILED;
636 uptodate = 0;
637 }
638 } else if (!blk_pc_request(rq)) {
639 ide_cd_request_sense_fixup(drive, cmd);
640 /* complain if we still have data left to transfer */
641 uptodate = cmd->nleft ? 0 : 1;
642 if (uptodate == 0)
643 rq->cmd_flags |= REQ_FAILED;
644 }
645 goto out_end;
646 }
647
648 /* check which way to transfer data */
649 rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
650 if (rc)
651 goto out_end;
652
653 cmd->last_xfer_len = 0;
654
655 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
656 "ireason: 0x%x",
657 rq->cmd_type, ireason);
658
659 /* transfer data */
660 while (thislen > 0) {
661 int blen = min_t(int, thislen, cmd->nleft);
662
663 if (cmd->nleft == 0)
664 break;
665
666 ide_pio_bytes(drive, cmd, write, blen);
667 cmd->last_xfer_len += blen;
668
669 thislen -= blen;
670 len -= blen;
671
672 if (sense && write == 0)
673 rq->sense_len += blen;
674 }
675
676 /* pad, if necessary */
677 if (len > 0) {
678 if (blk_fs_request(rq) == 0 || write == 0)
679 ide_pad_transfer(drive, write, len);
680 else {
681 printk(KERN_ERR PFX "%s: confused, missing data\n",
682 drive->name);
683 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
684 }
685 }
686
687 if (blk_pc_request(rq)) {
688 timeout = rq->timeout;
689 } else {
690 timeout = ATAPI_WAIT_PC;
691 if (!blk_fs_request(rq))
692 expiry = ide_cd_expiry;
693 }
694
695 hwif->expiry = expiry;
696 ide_set_handler(drive, cdrom_newpc_intr, timeout);
697 return ide_started;
698
699 out_end:
700 if (blk_pc_request(rq) && rc == 0) {
701 rq->resid_len = 0;
702 blk_end_request_all(rq, 0);
703 hwif->rq = NULL;
704 } else {
705 if (sense && uptodate)
706 ide_cd_complete_failed_rq(drive, rq);
707
708 if (blk_fs_request(rq)) {
709 if (cmd->nleft == 0)
710 uptodate = 1;
711 } else {
712 if (uptodate <= 0 && rq->errors == 0)
713 rq->errors = -EIO;
714 }
715
716 if (uptodate == 0)
717 ide_cd_error_cmd(drive, cmd);
718
719 /* make sure it's fully ended */
720 if (blk_fs_request(rq) == 0) {
721 rq->resid_len -= cmd->nbytes - cmd->nleft;
722 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
723 rq->resid_len += cmd->last_xfer_len;
724 }
725
726 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
727
728 if (sense && rc == 2)
729 ide_error(drive, "request sense failure", stat);
730 }
731 return ide_stopped;
732 }
733
734 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
735 {
736 struct cdrom_info *cd = drive->driver_data;
737 struct request_queue *q = drive->queue;
738 int write = rq_data_dir(rq) == WRITE;
739 unsigned short sectors_per_frame =
740 queue_logical_block_size(q) >> SECTOR_BITS;
741
742 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
743 "secs_per_frame: %u",
744 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
745
746 if (write) {
747 /* disk has become write protected */
748 if (get_disk_ro(cd->disk))
749 return ide_stopped;
750 } else {
751 /*
752 * We may be retrying this request after an error. Fix up any
753 * weirdness which might be present in the request packet.
754 */
755 q->prep_rq_fn(q, rq);
756 }
757
758 /* fs requests *must* be hardware frame aligned */
759 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
760 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
761 return ide_stopped;
762
763 /* use DMA, if possible */
764 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
765
766 if (write)
767 cd->devinfo.media_written = 1;
768
769 rq->timeout = ATAPI_WAIT_PC;
770
771 return ide_started;
772 }
773
774 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
775 {
776
777 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
778 rq->cmd[0], rq->cmd_type);
779
780 if (blk_pc_request(rq))
781 rq->cmd_flags |= REQ_QUIET;
782 else
783 rq->cmd_flags &= ~REQ_FAILED;
784
785 drive->dma = 0;
786
787 /* sg request */
788 if (rq->bio) {
789 struct request_queue *q = drive->queue;
790 char *buf = bio_data(rq->bio);
791 unsigned int alignment;
792
793 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
794
795 /*
796 * check if dma is safe
797 *
798 * NOTE! The "len" and "addr" checks should possibly have
799 * separate masks.
800 */
801 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
802 if ((unsigned long)buf & alignment
803 || blk_rq_bytes(rq) & q->dma_pad_mask
804 || object_is_on_stack(buf))
805 drive->dma = 0;
806 }
807 }
808
809 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
810 sector_t block)
811 {
812 struct ide_cmd cmd;
813 int uptodate = 0, nsectors;
814
815 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
816 rq->cmd[0], (unsigned long long)block);
817
818 if (drive->debug_mask & IDE_DBG_RQ)
819 blk_dump_rq_flags(rq, "ide_cd_do_request");
820
821 if (blk_fs_request(rq)) {
822 if (cdrom_start_rw(drive, rq) == ide_stopped)
823 goto out_end;
824 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
825 rq->cmd_type == REQ_TYPE_ATA_PC) {
826 if (!rq->timeout)
827 rq->timeout = ATAPI_WAIT_PC;
828
829 cdrom_do_block_pc(drive, rq);
830 } else if (blk_special_request(rq)) {
831 /* right now this can only be a reset... */
832 uptodate = 1;
833 goto out_end;
834 } else {
835 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
836 if (rq->errors == 0)
837 rq->errors = -EIO;
838 goto out_end;
839 }
840
841 /* prepare sense request for this command */
842 ide_prep_sense(drive, rq);
843
844 memset(&cmd, 0, sizeof(cmd));
845
846 if (rq_data_dir(rq))
847 cmd.tf_flags |= IDE_TFLAG_WRITE;
848
849 cmd.rq = rq;
850
851 if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
852 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
853 ide_map_sg(drive, &cmd);
854 }
855
856 return ide_issue_pc(drive, &cmd);
857 out_end:
858 nsectors = blk_rq_sectors(rq);
859
860 if (nsectors == 0)
861 nsectors = 1;
862
863 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
864
865 return ide_stopped;
866 }
867
868 /*
869 * Ioctl handling.
870 *
871 * Routines which queue packet commands take as a final argument a pointer to a
872 * request_sense struct. If execution of the command results in an error with a
873 * CHECK CONDITION status, this structure will be filled with the results of the
874 * subsequent request sense command. The pointer can also be NULL, in which case
875 * no sense information is returned.
876 */
877 static void msf_from_bcd(struct atapi_msf *msf)
878 {
879 msf->minute = bcd2bin(msf->minute);
880 msf->second = bcd2bin(msf->second);
881 msf->frame = bcd2bin(msf->frame);
882 }
883
884 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
885 {
886 struct cdrom_info *info = drive->driver_data;
887 struct cdrom_device_info *cdi = &info->devinfo;
888 unsigned char cmd[BLK_MAX_CDB];
889
890 ide_debug_log(IDE_DBG_FUNC, "enter");
891
892 memset(cmd, 0, BLK_MAX_CDB);
893 cmd[0] = GPCMD_TEST_UNIT_READY;
894
895 /*
896 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
897 * instead of supporting the LOAD_UNLOAD opcode.
898 */
899 cmd[7] = cdi->sanyo_slot % 3;
900
901 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
902 }
903
904 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
905 unsigned long *sectors_per_frame,
906 struct request_sense *sense)
907 {
908 struct {
909 __be32 lba;
910 __be32 blocklen;
911 } capbuf;
912
913 int stat;
914 unsigned char cmd[BLK_MAX_CDB];
915 unsigned len = sizeof(capbuf);
916 u32 blocklen;
917
918 ide_debug_log(IDE_DBG_FUNC, "enter");
919
920 memset(cmd, 0, BLK_MAX_CDB);
921 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
922
923 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
924 REQ_QUIET);
925 if (stat)
926 return stat;
927
928 /*
929 * Sanity check the given block size
930 */
931 blocklen = be32_to_cpu(capbuf.blocklen);
932 switch (blocklen) {
933 case 512:
934 case 1024:
935 case 2048:
936 case 4096:
937 break;
938 default:
939 printk(KERN_ERR PFX "%s: weird block size %u\n",
940 drive->name, blocklen);
941 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
942 drive->name);
943 blocklen = 2048;
944 break;
945 }
946
947 *capacity = 1 + be32_to_cpu(capbuf.lba);
948 *sectors_per_frame = blocklen >> SECTOR_BITS;
949
950 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
951 *capacity, *sectors_per_frame);
952
953 return 0;
954 }
955
956 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
957 int format, char *buf, int buflen,
958 struct request_sense *sense)
959 {
960 unsigned char cmd[BLK_MAX_CDB];
961
962 ide_debug_log(IDE_DBG_FUNC, "enter");
963
964 memset(cmd, 0, BLK_MAX_CDB);
965
966 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
967 cmd[6] = trackno;
968 cmd[7] = (buflen >> 8);
969 cmd[8] = (buflen & 0xff);
970 cmd[9] = (format << 6);
971
972 if (msf_flag)
973 cmd[1] = 2;
974
975 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
976 }
977
978 /* Try to read the entire TOC for the disk into our internal buffer. */
979 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
980 {
981 int stat, ntracks, i;
982 struct cdrom_info *info = drive->driver_data;
983 struct cdrom_device_info *cdi = &info->devinfo;
984 struct atapi_toc *toc = info->toc;
985 struct {
986 struct atapi_toc_header hdr;
987 struct atapi_toc_entry ent;
988 } ms_tmp;
989 long last_written;
990 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
991
992 ide_debug_log(IDE_DBG_FUNC, "enter");
993
994 if (toc == NULL) {
995 /* try to allocate space */
996 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
997 if (toc == NULL) {
998 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
999 drive->name);
1000 return -ENOMEM;
1001 }
1002 info->toc = toc;
1003 }
1004
1005 /*
1006 * Check to see if the existing data is still valid. If it is,
1007 * just return.
1008 */
1009 (void) cdrom_check_status(drive, sense);
1010
1011 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1012 return 0;
1013
1014 /* try to get the total cdrom capacity and sector size */
1015 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1016 sense);
1017 if (stat)
1018 toc->capacity = 0x1fffff;
1019
1020 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1021 /* save a private copy of the TOC capacity for error handling */
1022 drive->probed_capacity = toc->capacity * sectors_per_frame;
1023
1024 blk_queue_logical_block_size(drive->queue,
1025 sectors_per_frame << SECTOR_BITS);
1026
1027 /* first read just the header, so we know how long the TOC is */
1028 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1029 sizeof(struct atapi_toc_header), sense);
1030 if (stat)
1031 return stat;
1032
1033 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1034 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1035 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1036 }
1037
1038 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1039 if (ntracks <= 0)
1040 return -EIO;
1041 if (ntracks > MAX_TRACKS)
1042 ntracks = MAX_TRACKS;
1043
1044 /* now read the whole schmeer */
1045 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1046 (char *)&toc->hdr,
1047 sizeof(struct atapi_toc_header) +
1048 (ntracks + 1) *
1049 sizeof(struct atapi_toc_entry), sense);
1050
1051 if (stat && toc->hdr.first_track > 1) {
1052 /*
1053 * Cds with CDI tracks only don't have any TOC entries, despite
1054 * of this the returned values are
1055 * first_track == last_track = number of CDI tracks + 1,
1056 * so that this case is indistinguishable from the same layout
1057 * plus an additional audio track. If we get an error for the
1058 * regular case, we assume a CDI without additional audio
1059 * tracks. In this case the readable TOC is empty (CDI tracks
1060 * are not included) and only holds the Leadout entry.
1061 *
1062 * Heiko Eißfeldt.
1063 */
1064 ntracks = 0;
1065 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1066 (char *)&toc->hdr,
1067 sizeof(struct atapi_toc_header) +
1068 (ntracks + 1) *
1069 sizeof(struct atapi_toc_entry),
1070 sense);
1071 if (stat)
1072 return stat;
1073
1074 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1075 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1076 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1077 } else {
1078 toc->hdr.first_track = CDROM_LEADOUT;
1079 toc->hdr.last_track = CDROM_LEADOUT;
1080 }
1081 }
1082
1083 if (stat)
1084 return stat;
1085
1086 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1087
1088 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1089 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1090 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1091 }
1092
1093 for (i = 0; i <= ntracks; i++) {
1094 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1095 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1096 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1097 msf_from_bcd(&toc->ent[i].addr.msf);
1098 }
1099 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1100 toc->ent[i].addr.msf.second,
1101 toc->ent[i].addr.msf.frame);
1102 }
1103
1104 if (toc->hdr.first_track != CDROM_LEADOUT) {
1105 /* read the multisession information */
1106 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1107 sizeof(ms_tmp), sense);
1108 if (stat)
1109 return stat;
1110
1111 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1112 } else {
1113 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1114 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1115 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1116 }
1117
1118 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1119 /* re-read multisession information using MSF format */
1120 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1121 sizeof(ms_tmp), sense);
1122 if (stat)
1123 return stat;
1124
1125 msf_from_bcd(&ms_tmp.ent.addr.msf);
1126 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1127 ms_tmp.ent.addr.msf.second,
1128 ms_tmp.ent.addr.msf.frame);
1129 }
1130
1131 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1132
1133 /* now try to get the total cdrom capacity */
1134 stat = cdrom_get_last_written(cdi, &last_written);
1135 if (!stat && (last_written > toc->capacity)) {
1136 toc->capacity = last_written;
1137 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1138 drive->probed_capacity = toc->capacity * sectors_per_frame;
1139 }
1140
1141 /* Remember that we've read this stuff. */
1142 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1143
1144 return 0;
1145 }
1146
1147 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1148 {
1149 struct cdrom_info *info = drive->driver_data;
1150 struct cdrom_device_info *cdi = &info->devinfo;
1151 struct packet_command cgc;
1152 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1153
1154 ide_debug_log(IDE_DBG_FUNC, "enter");
1155
1156 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1157 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1158
1159 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1160 do {
1161 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1162 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1163 if (!stat)
1164 break;
1165 } while (--attempts);
1166 return stat;
1167 }
1168
1169 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1170 {
1171 struct cdrom_info *cd = drive->driver_data;
1172 u16 curspeed, maxspeed;
1173
1174 ide_debug_log(IDE_DBG_FUNC, "enter");
1175
1176 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1177 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1178 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1179 } else {
1180 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1181 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1182 }
1183
1184 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1185 curspeed, maxspeed);
1186
1187 cd->current_speed = (curspeed + (176/2)) / 176;
1188 cd->max_speed = (maxspeed + (176/2)) / 176;
1189 }
1190
1191 #define IDE_CD_CAPABILITIES \
1192 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1193 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1194 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1195 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1196 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1197
1198 static struct cdrom_device_ops ide_cdrom_dops = {
1199 .open = ide_cdrom_open_real,
1200 .release = ide_cdrom_release_real,
1201 .drive_status = ide_cdrom_drive_status,
1202 .media_changed = ide_cdrom_check_media_change_real,
1203 .tray_move = ide_cdrom_tray_move,
1204 .lock_door = ide_cdrom_lock_door,
1205 .select_speed = ide_cdrom_select_speed,
1206 .get_last_session = ide_cdrom_get_last_session,
1207 .get_mcn = ide_cdrom_get_mcn,
1208 .reset = ide_cdrom_reset,
1209 .audio_ioctl = ide_cdrom_audio_ioctl,
1210 .capability = IDE_CD_CAPABILITIES,
1211 .generic_packet = ide_cdrom_packet,
1212 };
1213
1214 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1215 {
1216 struct cdrom_info *info = drive->driver_data;
1217 struct cdrom_device_info *devinfo = &info->devinfo;
1218
1219 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1220
1221 devinfo->ops = &ide_cdrom_dops;
1222 devinfo->speed = info->current_speed;
1223 devinfo->capacity = nslots;
1224 devinfo->handle = drive;
1225 strcpy(devinfo->name, drive->name);
1226
1227 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1228 devinfo->mask |= CDC_SELECT_SPEED;
1229
1230 devinfo->disk = info->disk;
1231 return register_cdrom(devinfo);
1232 }
1233
1234 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1235 {
1236 struct cdrom_info *cd = drive->driver_data;
1237 struct cdrom_device_info *cdi = &cd->devinfo;
1238 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1239 mechtype_t mechtype;
1240 int nslots = 1;
1241
1242 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1243 drive->media, drive->atapi_flags);
1244
1245 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1246 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1247 CDC_MO_DRIVE | CDC_RAM);
1248
1249 if (drive->media == ide_optical) {
1250 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1251 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1252 drive->name);
1253 return nslots;
1254 }
1255
1256 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1257 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1258 cdi->mask &= ~CDC_PLAY_AUDIO;
1259 return nslots;
1260 }
1261
1262 /*
1263 * We have to cheat a little here. the packet will eventually be queued
1264 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1265 * Since this device hasn't been registered with the Uniform layer yet,
1266 * it can't do this. Same goes for cdi->ops.
1267 */
1268 cdi->handle = drive;
1269 cdi->ops = &ide_cdrom_dops;
1270
1271 if (ide_cdrom_get_capabilities(drive, buf))
1272 return 0;
1273
1274 if ((buf[8 + 6] & 0x01) == 0)
1275 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1276 if (buf[8 + 6] & 0x08)
1277 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1278 if (buf[8 + 3] & 0x01)
1279 cdi->mask &= ~CDC_CD_R;
1280 if (buf[8 + 3] & 0x02)
1281 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1282 if (buf[8 + 2] & 0x38)
1283 cdi->mask &= ~CDC_DVD;
1284 if (buf[8 + 3] & 0x20)
1285 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1286 if (buf[8 + 3] & 0x10)
1287 cdi->mask &= ~CDC_DVD_R;
1288 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1289 cdi->mask &= ~CDC_PLAY_AUDIO;
1290
1291 mechtype = buf[8 + 6] >> 5;
1292 if (mechtype == mechtype_caddy ||
1293 mechtype == mechtype_popup ||
1294 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1295 cdi->mask |= CDC_CLOSE_TRAY;
1296
1297 if (cdi->sanyo_slot > 0) {
1298 cdi->mask &= ~CDC_SELECT_DISC;
1299 nslots = 3;
1300 } else if (mechtype == mechtype_individual_changer ||
1301 mechtype == mechtype_cartridge_changer) {
1302 nslots = cdrom_number_of_slots(cdi);
1303 if (nslots > 1)
1304 cdi->mask &= ~CDC_SELECT_DISC;
1305 }
1306
1307 ide_cdrom_update_speed(drive, buf);
1308
1309 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1310
1311 /* don't print speed if the drive reported 0 */
1312 if (cd->max_speed)
1313 printk(KERN_CONT " %dX", cd->max_speed);
1314
1315 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1316
1317 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1318 printk(KERN_CONT " DVD%s%s",
1319 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1320 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1321
1322 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1323 printk(KERN_CONT " CD%s%s",
1324 (cdi->mask & CDC_CD_R) ? "" : "-R",
1325 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1326
1327 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1328 printk(KERN_CONT " changer w/%d slots", nslots);
1329 else
1330 printk(KERN_CONT " drive");
1331
1332 printk(KERN_CONT ", %dkB Cache\n",
1333 be16_to_cpup((__be16 *)&buf[8 + 12]));
1334
1335 return nslots;
1336 }
1337
1338 /* standard prep_rq_fn that builds 10 byte cmds */
1339 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1340 {
1341 int hard_sect = queue_logical_block_size(q);
1342 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1343 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1344
1345 memset(rq->cmd, 0, BLK_MAX_CDB);
1346
1347 if (rq_data_dir(rq) == READ)
1348 rq->cmd[0] = GPCMD_READ_10;
1349 else
1350 rq->cmd[0] = GPCMD_WRITE_10;
1351
1352 /*
1353 * fill in lba
1354 */
1355 rq->cmd[2] = (block >> 24) & 0xff;
1356 rq->cmd[3] = (block >> 16) & 0xff;
1357 rq->cmd[4] = (block >> 8) & 0xff;
1358 rq->cmd[5] = block & 0xff;
1359
1360 /*
1361 * and transfer length
1362 */
1363 rq->cmd[7] = (blocks >> 8) & 0xff;
1364 rq->cmd[8] = blocks & 0xff;
1365 rq->cmd_len = 10;
1366 return BLKPREP_OK;
1367 }
1368
1369 /*
1370 * Most of the SCSI commands are supported directly by ATAPI devices.
1371 * This transform handles the few exceptions.
1372 */
1373 static int ide_cdrom_prep_pc(struct request *rq)
1374 {
1375 u8 *c = rq->cmd;
1376
1377 /* transform 6-byte read/write commands to the 10-byte version */
1378 if (c[0] == READ_6 || c[0] == WRITE_6) {
1379 c[8] = c[4];
1380 c[5] = c[3];
1381 c[4] = c[2];
1382 c[3] = c[1] & 0x1f;
1383 c[2] = 0;
1384 c[1] &= 0xe0;
1385 c[0] += (READ_10 - READ_6);
1386 rq->cmd_len = 10;
1387 return BLKPREP_OK;
1388 }
1389
1390 /*
1391 * it's silly to pretend we understand 6-byte sense commands, just
1392 * reject with ILLEGAL_REQUEST and the caller should take the
1393 * appropriate action
1394 */
1395 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1396 rq->errors = ILLEGAL_REQUEST;
1397 return BLKPREP_KILL;
1398 }
1399
1400 return BLKPREP_OK;
1401 }
1402
1403 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1404 {
1405 if (blk_fs_request(rq))
1406 return ide_cdrom_prep_fs(q, rq);
1407 else if (blk_pc_request(rq))
1408 return ide_cdrom_prep_pc(rq);
1409
1410 return 0;
1411 }
1412
1413 struct cd_list_entry {
1414 const char *id_model;
1415 const char *id_firmware;
1416 unsigned int cd_flags;
1417 };
1418
1419 #ifdef CONFIG_IDE_PROC_FS
1420 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1421 {
1422 unsigned long capacity, sectors_per_frame;
1423
1424 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1425 return 0;
1426
1427 return capacity * sectors_per_frame;
1428 }
1429
1430 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1431 int count, int *eof, void *data)
1432 {
1433 ide_drive_t *drive = data;
1434 int len;
1435
1436 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1437 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1438 }
1439
1440 static ide_proc_entry_t idecd_proc[] = {
1441 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1442 { NULL, 0, NULL, NULL }
1443 };
1444
1445 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1446 {
1447 return idecd_proc;
1448 }
1449
1450 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1451 {
1452 return NULL;
1453 }
1454 #endif
1455
1456 static const struct cd_list_entry ide_cd_quirks_list[] = {
1457 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1458 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1459 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1460 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1461 IDE_AFLAG_PRE_ATAPI12, },
1462 /* Vertos 300, some versions of this drive like to talk BCD. */
1463 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1464 /* Vertos 600 ESD. */
1465 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1466 /*
1467 * Sanyo 3 CD changer uses a non-standard command for CD changing
1468 * (by default standard ATAPI support for CD changers is used).
1469 */
1470 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1471 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1472 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1473 /* Stingray 8X CD-ROM. */
1474 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1475 /*
1476 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1477 * mode sense page capabilities size, but older drives break.
1478 */
1479 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1480 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1481 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1482 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1483 /*
1484 * Some drives used by Apple don't advertise audio play
1485 * but they do support reading TOC & audio datas.
1486 */
1487 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1488 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1489 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1490 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1491 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1492 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1493 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1494 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1495 { NULL, NULL, 0 }
1496 };
1497
1498 static unsigned int ide_cd_flags(u16 *id)
1499 {
1500 const struct cd_list_entry *cle = ide_cd_quirks_list;
1501
1502 while (cle->id_model) {
1503 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1504 (cle->id_firmware == NULL ||
1505 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1506 return cle->cd_flags;
1507 cle++;
1508 }
1509
1510 return 0;
1511 }
1512
1513 static int ide_cdrom_setup(ide_drive_t *drive)
1514 {
1515 struct cdrom_info *cd = drive->driver_data;
1516 struct cdrom_device_info *cdi = &cd->devinfo;
1517 struct request_queue *q = drive->queue;
1518 u16 *id = drive->id;
1519 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1520 int nslots;
1521
1522 ide_debug_log(IDE_DBG_PROBE, "enter");
1523
1524 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1525 blk_queue_dma_alignment(q, 31);
1526 blk_queue_update_dma_pad(q, 15);
1527
1528 q->unplug_delay = max((1 * HZ) / 1000, 1);
1529
1530 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1531 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1532
1533 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1534 fw_rev[4] == '1' && fw_rev[6] <= '2')
1535 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1536 IDE_AFLAG_TOCADDR_AS_BCD);
1537 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1538 fw_rev[4] == '1' && fw_rev[6] <= '2')
1539 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1540 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1541 /* 3 => use CD in slot 0 */
1542 cdi->sanyo_slot = 3;
1543
1544 nslots = ide_cdrom_probe_capabilities(drive);
1545
1546 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1547
1548 if (ide_cdrom_register(drive, nslots)) {
1549 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1550 " cdrom driver.\n", drive->name, __func__);
1551 cd->devinfo.handle = NULL;
1552 return 1;
1553 }
1554
1555 ide_proc_register_driver(drive, cd->driver);
1556 return 0;
1557 }
1558
1559 static void ide_cd_remove(ide_drive_t *drive)
1560 {
1561 struct cdrom_info *info = drive->driver_data;
1562
1563 ide_debug_log(IDE_DBG_FUNC, "enter");
1564
1565 ide_proc_unregister_driver(drive, info->driver);
1566 device_del(&info->dev);
1567 del_gendisk(info->disk);
1568
1569 mutex_lock(&idecd_ref_mutex);
1570 put_device(&info->dev);
1571 mutex_unlock(&idecd_ref_mutex);
1572 }
1573
1574 static void ide_cd_release(struct device *dev)
1575 {
1576 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1577 struct cdrom_device_info *devinfo = &info->devinfo;
1578 ide_drive_t *drive = info->drive;
1579 struct gendisk *g = info->disk;
1580
1581 ide_debug_log(IDE_DBG_FUNC, "enter");
1582
1583 kfree(info->toc);
1584 if (devinfo->handle == drive)
1585 unregister_cdrom(devinfo);
1586 drive->driver_data = NULL;
1587 blk_queue_prep_rq(drive->queue, NULL);
1588 g->private_data = NULL;
1589 put_disk(g);
1590 kfree(info);
1591 }
1592
1593 static int ide_cd_probe(ide_drive_t *);
1594
1595 static struct ide_driver ide_cdrom_driver = {
1596 .gen_driver = {
1597 .owner = THIS_MODULE,
1598 .name = "ide-cdrom",
1599 .bus = &ide_bus_type,
1600 },
1601 .probe = ide_cd_probe,
1602 .remove = ide_cd_remove,
1603 .version = IDECD_VERSION,
1604 .do_request = ide_cd_do_request,
1605 #ifdef CONFIG_IDE_PROC_FS
1606 .proc_entries = ide_cd_proc_entries,
1607 .proc_devsets = ide_cd_proc_devsets,
1608 #endif
1609 };
1610
1611 static int idecd_open(struct block_device *bdev, fmode_t mode)
1612 {
1613 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1614 int rc = -ENOMEM;
1615
1616 if (!info)
1617 return -ENXIO;
1618
1619 rc = cdrom_open(&info->devinfo, bdev, mode);
1620
1621 if (rc < 0)
1622 ide_cd_put(info);
1623
1624 return rc;
1625 }
1626
1627 static int idecd_release(struct gendisk *disk, fmode_t mode)
1628 {
1629 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1630
1631 cdrom_release(&info->devinfo, mode);
1632
1633 ide_cd_put(info);
1634
1635 return 0;
1636 }
1637
1638 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1639 {
1640 struct packet_command cgc;
1641 char buffer[16];
1642 int stat;
1643 char spindown;
1644
1645 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1646 return -EFAULT;
1647
1648 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1649
1650 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1651 if (stat)
1652 return stat;
1653
1654 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1655 return cdrom_mode_select(cdi, &cgc);
1656 }
1657
1658 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1659 {
1660 struct packet_command cgc;
1661 char buffer[16];
1662 int stat;
1663 char spindown;
1664
1665 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1666
1667 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1668 if (stat)
1669 return stat;
1670
1671 spindown = buffer[11] & 0x0f;
1672 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1673 return -EFAULT;
1674 return 0;
1675 }
1676
1677 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1678 unsigned int cmd, unsigned long arg)
1679 {
1680 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1681 int err;
1682
1683 switch (cmd) {
1684 case CDROMSETSPINDOWN:
1685 return idecd_set_spindown(&info->devinfo, arg);
1686 case CDROMGETSPINDOWN:
1687 return idecd_get_spindown(&info->devinfo, arg);
1688 default:
1689 break;
1690 }
1691
1692 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1693 if (err == -EINVAL)
1694 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1695
1696 return err;
1697 }
1698
1699 static int idecd_media_changed(struct gendisk *disk)
1700 {
1701 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1702 return cdrom_media_changed(&info->devinfo);
1703 }
1704
1705 static int idecd_revalidate_disk(struct gendisk *disk)
1706 {
1707 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1708 struct request_sense sense;
1709
1710 ide_cd_read_toc(info->drive, &sense);
1711
1712 return 0;
1713 }
1714
1715 static struct block_device_operations idecd_ops = {
1716 .owner = THIS_MODULE,
1717 .open = idecd_open,
1718 .release = idecd_release,
1719 .locked_ioctl = idecd_ioctl,
1720 .media_changed = idecd_media_changed,
1721 .revalidate_disk = idecd_revalidate_disk
1722 };
1723
1724 /* module options */
1725 static unsigned long debug_mask;
1726 module_param(debug_mask, ulong, 0644);
1727
1728 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1729
1730 static int ide_cd_probe(ide_drive_t *drive)
1731 {
1732 struct cdrom_info *info;
1733 struct gendisk *g;
1734 struct request_sense sense;
1735
1736 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1737 drive->driver_req, drive->media);
1738
1739 if (!strstr("ide-cdrom", drive->driver_req))
1740 goto failed;
1741
1742 if (drive->media != ide_cdrom && drive->media != ide_optical)
1743 goto failed;
1744
1745 drive->debug_mask = debug_mask;
1746 drive->irq_handler = cdrom_newpc_intr;
1747
1748 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1749 if (info == NULL) {
1750 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1751 drive->name);
1752 goto failed;
1753 }
1754
1755 g = alloc_disk(1 << PARTN_BITS);
1756 if (!g)
1757 goto out_free_cd;
1758
1759 ide_init_disk(g, drive);
1760
1761 info->dev.parent = &drive->gendev;
1762 info->dev.release = ide_cd_release;
1763 dev_set_name(&info->dev, dev_name(&drive->gendev));
1764
1765 if (device_register(&info->dev))
1766 goto out_free_disk;
1767
1768 info->drive = drive;
1769 info->driver = &ide_cdrom_driver;
1770 info->disk = g;
1771
1772 g->private_data = &info->driver;
1773
1774 drive->driver_data = info;
1775
1776 g->minors = 1;
1777 g->driverfs_dev = &drive->gendev;
1778 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1779 if (ide_cdrom_setup(drive)) {
1780 put_device(&info->dev);
1781 goto failed;
1782 }
1783
1784 ide_cd_read_toc(drive, &sense);
1785 g->fops = &idecd_ops;
1786 g->flags |= GENHD_FL_REMOVABLE;
1787 add_disk(g);
1788 return 0;
1789
1790 out_free_disk:
1791 put_disk(g);
1792 out_free_cd:
1793 kfree(info);
1794 failed:
1795 return -ENODEV;
1796 }
1797
1798 static void __exit ide_cdrom_exit(void)
1799 {
1800 driver_unregister(&ide_cdrom_driver.gen_driver);
1801 }
1802
1803 static int __init ide_cdrom_init(void)
1804 {
1805 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1806 return driver_register(&ide_cdrom_driver.gen_driver);
1807 }
1808
1809 MODULE_ALIAS("ide:*m-cdrom*");
1810 MODULE_ALIAS("ide-cd");
1811 module_init(ide_cdrom_init);
1812 module_exit(ide_cdrom_exit);
1813 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)