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