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