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cx88: fix locking of sub-driver operations
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob413e4ef60356e3d6a4945fb8f42a875949f018d8
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(ide_cd_mutex);
55 static DEFINE_MUTEX(idecd_ref_mutex);
56
57 static void ide_cd_release(struct device *);
58
59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
60 {
61 struct cdrom_info *cd = NULL;
62
63 mutex_lock(&idecd_ref_mutex);
64 cd = ide_drv_g(disk, cdrom_info);
65 if (cd) {
66 if (ide_device_get(cd->drive))
67 cd = NULL;
68 else
69 get_device(&cd->dev);
70
71 }
72 mutex_unlock(&idecd_ref_mutex);
73 return cd;
74 }
75
76 static void ide_cd_put(struct cdrom_info *cd)
77 {
78 ide_drive_t *drive = cd->drive;
79
80 mutex_lock(&idecd_ref_mutex);
81 put_device(&cd->dev);
82 ide_device_put(drive);
83 mutex_unlock(&idecd_ref_mutex);
84 }
85
86 /*
87 * Generic packet command support and error handling routines.
88 */
89
90 /* Mark that we've seen a media change and invalidate our internal buffers. */
91 static void cdrom_saw_media_change(ide_drive_t *drive)
92 {
93 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
94 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
95 }
96
97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
98 {
99 struct request_sense *sense = &drive->sense_data;
100 int log = 0;
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
106
107 switch (sense->sense_key) {
108 case NO_SENSE:
109 case RECOVERED_ERROR:
110 break;
111 case NOT_READY:
112 /*
113 * don't care about tray state messages for e.g. capacity
114 * commands or in-progress or becoming ready
115 */
116 if (sense->asc == 0x3a || sense->asc == 0x04)
117 break;
118 log = 1;
119 break;
120 case ILLEGAL_REQUEST:
121 /*
122 * don't log START_STOP unit with LoEj set, since we cannot
123 * reliably check if drive can auto-close
124 */
125 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126 break;
127 log = 1;
128 break;
129 case UNIT_ATTENTION:
130 /*
131 * Make good and sure we've seen this potential media change.
132 * Some drives (i.e. Creative) fail to present the correct sense
133 * key in the error register.
134 */
135 cdrom_saw_media_change(drive);
136 break;
137 default:
138 log = 1;
139 break;
140 }
141 return log;
142 }
143
144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
145 struct request *failed_command)
146 {
147 struct request_sense *sense = &drive->sense_data;
148 struct cdrom_info *info = drive->driver_data;
149 unsigned long sector;
150 unsigned long bio_sectors;
151
152 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
153 sense->error_code, sense->sense_key);
154
155 if (failed_command)
156 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
157 failed_command->cmd[0]);
158
159 if (!cdrom_log_sense(drive, failed_command))
160 return;
161
162 /*
163 * If a read toc is executed for a CD-R or CD-RW medium where the first
164 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
165 * confusing error)
166 */
167 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168 if (sense->sense_key == 0x05 && sense->asc == 0x24)
169 return;
170
171 /* current error */
172 if (sense->error_code == 0x70) {
173 switch (sense->sense_key) {
174 case MEDIUM_ERROR:
175 case VOLUME_OVERFLOW:
176 case ILLEGAL_REQUEST:
177 if (!sense->valid)
178 break;
179 if (failed_command == NULL ||
180 failed_command->cmd_type != REQ_TYPE_FS)
181 break;
182 sector = (sense->information[0] << 24) |
183 (sense->information[1] << 16) |
184 (sense->information[2] << 8) |
185 (sense->information[3]);
186
187 if (queue_logical_block_size(drive->queue) == 2048)
188 /* device sector size is 2K */
189 sector <<= 2;
190
191 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
192 sector &= ~(bio_sectors - 1);
193
194 /*
195 * The SCSI specification allows for the value
196 * returned by READ CAPACITY to be up to 75 2K
197 * sectors past the last readable block.
198 * Therefore, if we hit a medium error within the
199 * last 75 2K sectors, we decrease the saved size
200 * value.
201 */
202 if (sector < get_capacity(info->disk) &&
203 drive->probed_capacity - sector < 4 * 75)
204 set_capacity(info->disk, sector);
205 }
206 }
207
208 ide_cd_log_error(drive->name, failed_command, sense);
209 }
210
211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
212 {
213 /*
214 * For REQ_TYPE_SENSE, "rq->special" points to the original
215 * failed request. Also, the sense data should be read
216 * directly from rq which might be different from the original
217 * sense buffer if it got copied during mapping.
218 */
219 struct request *failed = (struct request *)rq->special;
220 void *sense = bio_data(rq->bio);
221
222 if (failed) {
223 if (failed->sense) {
224 /*
225 * Sense is always read into drive->sense_data.
226 * Copy back if the failed request has its
227 * sense pointer set.
228 */
229 memcpy(failed->sense, sense, 18);
230 failed->sense_len = rq->sense_len;
231 }
232 cdrom_analyze_sense_data(drive, failed);
233
234 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
235 BUG();
236 } else
237 cdrom_analyze_sense_data(drive, NULL);
238 }
239
240
241 /*
242 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
243 * while flushing data from cache.
244 *
245 * returns: 0 failed (write timeout expired)
246 * 1 success
247 */
248 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
249 {
250
251 struct cdrom_info *info = drive->driver_data;
252
253 if (!rq->errors)
254 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
255
256 rq->errors = 1;
257
258 if (time_after(jiffies, info->write_timeout))
259 return 0;
260 else {
261 struct request_queue *q = drive->queue;
262 unsigned long flags;
263
264 /*
265 * take a breather relying on the unplug timer to kick us again
266 */
267
268 spin_lock_irqsave(q->queue_lock, flags);
269 blk_plug_device(q);
270 spin_unlock_irqrestore(q->queue_lock, flags);
271
272 return 1;
273 }
274 }
275
276 /**
277 * Returns:
278 * 0: if the request should be continued.
279 * 1: if the request will be going through error recovery.
280 * 2: if the request should be ended.
281 */
282 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
283 {
284 ide_hwif_t *hwif = drive->hwif;
285 struct request *rq = hwif->rq;
286 int err, sense_key, do_end_request = 0;
287
288 /* get the IDE error register */
289 err = ide_read_error(drive);
290 sense_key = err >> 4;
291
292 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
293 "stat 0x%x",
294 rq->cmd[0], rq->cmd_type, err, stat);
295
296 if (rq->cmd_type == REQ_TYPE_SENSE) {
297 /*
298 * We got an error trying to get sense info from the drive
299 * (probably while trying to recover from a former error).
300 * Just give up.
301 */
302 rq->cmd_flags |= REQ_FAILED;
303 return 2;
304 }
305
306 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
307 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
308 rq->errors = SAM_STAT_CHECK_CONDITION;
309
310 if (blk_noretry_request(rq))
311 do_end_request = 1;
312
313 switch (sense_key) {
314 case NOT_READY:
315 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
316 if (ide_cd_breathe(drive, rq))
317 return 1;
318 } else {
319 cdrom_saw_media_change(drive);
320
321 if (rq->cmd_type == REQ_TYPE_FS &&
322 !(rq->cmd_flags & REQ_QUIET))
323 printk(KERN_ERR PFX "%s: tray open\n",
324 drive->name);
325 }
326 do_end_request = 1;
327 break;
328 case UNIT_ATTENTION:
329 cdrom_saw_media_change(drive);
330
331 if (rq->cmd_type != REQ_TYPE_FS)
332 return 0;
333
334 /*
335 * Arrange to retry the request but be sure to give up if we've
336 * retried too many times.
337 */
338 if (++rq->errors > ERROR_MAX)
339 do_end_request = 1;
340 break;
341 case ILLEGAL_REQUEST:
342 /*
343 * Don't print error message for this condition -- SFF8090i
344 * indicates that 5/24/00 is the correct response to a request
345 * to close the tray if the drive doesn't have that capability.
346 *
347 * cdrom_log_sense() knows this!
348 */
349 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
350 break;
351 /* fall-through */
352 case DATA_PROTECT:
353 /*
354 * No point in retrying after an illegal request or data
355 * protect error.
356 */
357 if (!(rq->cmd_flags & REQ_QUIET))
358 ide_dump_status(drive, "command error", stat);
359 do_end_request = 1;
360 break;
361 case MEDIUM_ERROR:
362 /*
363 * No point in re-trying a zillion times on a bad sector.
364 * If we got here the error is not correctable.
365 */
366 if (!(rq->cmd_flags & REQ_QUIET))
367 ide_dump_status(drive, "media error "
368 "(bad sector)", stat);
369 do_end_request = 1;
370 break;
371 case BLANK_CHECK:
372 /* disk appears blank? */
373 if (!(rq->cmd_flags & REQ_QUIET))
374 ide_dump_status(drive, "media error (blank)",
375 stat);
376 do_end_request = 1;
377 break;
378 default:
379 if (rq->cmd_type != REQ_TYPE_FS)
380 break;
381 if (err & ~ATA_ABORTED) {
382 /* go to the default handler for other errors */
383 ide_error(drive, "cdrom_decode_status", stat);
384 return 1;
385 } else if (++rq->errors > ERROR_MAX)
386 /* we've racked up too many retries, abort */
387 do_end_request = 1;
388 }
389
390 if (rq->cmd_type != REQ_TYPE_FS) {
391 rq->cmd_flags |= REQ_FAILED;
392 do_end_request = 1;
393 }
394
395 /*
396 * End a request through request sense analysis when we have sense data.
397 * We need this in order to perform end of media processing.
398 */
399 if (do_end_request)
400 goto end_request;
401
402 /* if we got a CHECK_CONDITION status, queue a request sense command */
403 if (stat & ATA_ERR)
404 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
405 return 1;
406
407 end_request:
408 if (stat & ATA_ERR) {
409 hwif->rq = NULL;
410 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
411 } else
412 return 2;
413 }
414
415 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
416 {
417 struct request *rq = cmd->rq;
418
419 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
420
421 /*
422 * Some of the trailing request sense fields are optional,
423 * and some drives don't send them. Sigh.
424 */
425 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
426 cmd->nleft > 0 && cmd->nleft <= 5)
427 cmd->nleft = 0;
428 }
429
430 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
431 int write, void *buffer, unsigned *bufflen,
432 struct request_sense *sense, int timeout,
433 unsigned int cmd_flags)
434 {
435 struct cdrom_info *info = drive->driver_data;
436 struct request_sense local_sense;
437 int retries = 10;
438 unsigned int flags = 0;
439
440 if (!sense)
441 sense = &local_sense;
442
443 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
444 "cmd_flags: 0x%x",
445 cmd[0], write, timeout, cmd_flags);
446
447 /* start of retry loop */
448 do {
449 struct request *rq;
450 int error;
451
452 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
453
454 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
455 rq->cmd_type = REQ_TYPE_ATA_PC;
456 rq->sense = sense;
457 rq->cmd_flags |= cmd_flags;
458 rq->timeout = timeout;
459 if (buffer) {
460 error = blk_rq_map_kern(drive->queue, rq, buffer,
461 *bufflen, GFP_NOIO);
462 if (error) {
463 blk_put_request(rq);
464 return error;
465 }
466 }
467
468 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
469
470 if (buffer)
471 *bufflen = rq->resid_len;
472
473 flags = rq->cmd_flags;
474 blk_put_request(rq);
475
476 /*
477 * FIXME: we should probably abort/retry or something in case of
478 * failure.
479 */
480 if (flags & REQ_FAILED) {
481 /*
482 * The request failed. Retry if it was due to a unit
483 * attention status (usually means media was changed).
484 */
485 struct request_sense *reqbuf = sense;
486
487 if (reqbuf->sense_key == UNIT_ATTENTION)
488 cdrom_saw_media_change(drive);
489 else if (reqbuf->sense_key == NOT_READY &&
490 reqbuf->asc == 4 && reqbuf->ascq != 4) {
491 /*
492 * The drive is in the process of loading
493 * a disk. Retry, but wait a little to give
494 * the drive time to complete the load.
495 */
496 ssleep(2);
497 } else {
498 /* otherwise, don't retry */
499 retries = 0;
500 }
501 --retries;
502 }
503
504 /* end of retry loop */
505 } while ((flags & REQ_FAILED) && retries >= 0);
506
507 /* return an error if the command failed */
508 return (flags & REQ_FAILED) ? -EIO : 0;
509 }
510
511 /*
512 * returns true if rq has been completed
513 */
514 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
515 {
516 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
517
518 if (cmd->tf_flags & IDE_TFLAG_WRITE)
519 nr_bytes -= cmd->last_xfer_len;
520
521 if (nr_bytes > 0) {
522 ide_complete_rq(drive, 0, nr_bytes);
523 return true;
524 }
525
526 return false;
527 }
528
529 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
530 {
531 ide_hwif_t *hwif = drive->hwif;
532 struct ide_cmd *cmd = &hwif->cmd;
533 struct request *rq = hwif->rq;
534 ide_expiry_t *expiry = NULL;
535 int dma_error = 0, dma, thislen, uptodate = 0;
536 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
537 int sense = (rq->cmd_type == REQ_TYPE_SENSE);
538 unsigned int timeout;
539 u16 len;
540 u8 ireason, stat;
541
542 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
543
544 /* check for errors */
545 dma = drive->dma;
546 if (dma) {
547 drive->dma = 0;
548 drive->waiting_for_dma = 0;
549 dma_error = hwif->dma_ops->dma_end(drive);
550 ide_dma_unmap_sg(drive, cmd);
551 if (dma_error) {
552 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
553 write ? "write" : "read");
554 ide_dma_off(drive);
555 }
556 }
557
558 /* check status */
559 stat = hwif->tp_ops->read_status(hwif);
560
561 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
562 rc = cdrom_decode_status(drive, stat);
563 if (rc) {
564 if (rc == 2)
565 goto out_end;
566 return ide_stopped;
567 }
568 }
569
570 /* using dma, transfer is complete now */
571 if (dma) {
572 if (dma_error)
573 return ide_error(drive, "dma error", stat);
574 uptodate = 1;
575 goto out_end;
576 }
577
578 ide_read_bcount_and_ireason(drive, &len, &ireason);
579
580 thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
581 if (thislen > len)
582 thislen = len;
583
584 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
585 stat, thislen);
586
587 /* If DRQ is clear, the command has completed. */
588 if ((stat & ATA_DRQ) == 0) {
589 if (rq->cmd_type == REQ_TYPE_FS) {
590 /*
591 * If we're not done reading/writing, complain.
592 * Otherwise, complete the command normally.
593 */
594 uptodate = 1;
595 if (cmd->nleft > 0) {
596 printk(KERN_ERR PFX "%s: %s: data underrun "
597 "(%u bytes)\n", drive->name, __func__,
598 cmd->nleft);
599 if (!write)
600 rq->cmd_flags |= REQ_FAILED;
601 uptodate = 0;
602 }
603 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
604 ide_cd_request_sense_fixup(drive, cmd);
605
606 uptodate = cmd->nleft ? 0 : 1;
607
608 /*
609 * suck out the remaining bytes from the drive in an
610 * attempt to complete the data xfer. (see BZ#13399)
611 */
612 if (!(stat & ATA_ERR) && !uptodate && thislen) {
613 ide_pio_bytes(drive, cmd, write, thislen);
614 uptodate = cmd->nleft ? 0 : 1;
615 }
616
617 if (!uptodate)
618 rq->cmd_flags |= REQ_FAILED;
619 }
620 goto out_end;
621 }
622
623 rc = ide_check_ireason(drive, rq, len, ireason, write);
624 if (rc)
625 goto out_end;
626
627 cmd->last_xfer_len = 0;
628
629 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
630 "ireason: 0x%x",
631 rq->cmd_type, ireason);
632
633 /* transfer data */
634 while (thislen > 0) {
635 int blen = min_t(int, thislen, cmd->nleft);
636
637 if (cmd->nleft == 0)
638 break;
639
640 ide_pio_bytes(drive, cmd, write, blen);
641 cmd->last_xfer_len += blen;
642
643 thislen -= blen;
644 len -= blen;
645
646 if (sense && write == 0)
647 rq->sense_len += blen;
648 }
649
650 /* pad, if necessary */
651 if (len > 0) {
652 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
653 ide_pad_transfer(drive, write, len);
654 else {
655 printk(KERN_ERR PFX "%s: confused, missing data\n",
656 drive->name);
657 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
658 }
659 }
660
661 if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
662 timeout = rq->timeout;
663 } else {
664 timeout = ATAPI_WAIT_PC;
665 if (rq->cmd_type != REQ_TYPE_FS)
666 expiry = ide_cd_expiry;
667 }
668
669 hwif->expiry = expiry;
670 ide_set_handler(drive, cdrom_newpc_intr, timeout);
671 return ide_started;
672
673 out_end:
674 if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
675 rq->resid_len = 0;
676 blk_end_request_all(rq, 0);
677 hwif->rq = NULL;
678 } else {
679 if (sense && uptodate)
680 ide_cd_complete_failed_rq(drive, rq);
681
682 if (rq->cmd_type == REQ_TYPE_FS) {
683 if (cmd->nleft == 0)
684 uptodate = 1;
685 } else {
686 if (uptodate <= 0 && rq->errors == 0)
687 rq->errors = -EIO;
688 }
689
690 if (uptodate == 0 && rq->bio)
691 if (ide_cd_error_cmd(drive, cmd))
692 return ide_stopped;
693
694 /* make sure it's fully ended */
695 if (rq->cmd_type != REQ_TYPE_FS) {
696 rq->resid_len -= cmd->nbytes - cmd->nleft;
697 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
698 rq->resid_len += cmd->last_xfer_len;
699 }
700
701 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
702
703 if (sense && rc == 2)
704 ide_error(drive, "request sense failure", stat);
705 }
706 return ide_stopped;
707 }
708
709 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
710 {
711 struct cdrom_info *cd = drive->driver_data;
712 struct request_queue *q = drive->queue;
713 int write = rq_data_dir(rq) == WRITE;
714 unsigned short sectors_per_frame =
715 queue_logical_block_size(q) >> SECTOR_BITS;
716
717 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
718 "secs_per_frame: %u",
719 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
720
721 if (write) {
722 /* disk has become write protected */
723 if (get_disk_ro(cd->disk))
724 return ide_stopped;
725 } else {
726 /*
727 * We may be retrying this request after an error. Fix up any
728 * weirdness which might be present in the request packet.
729 */
730 q->prep_rq_fn(q, rq);
731 }
732
733 /* fs requests *must* be hardware frame aligned */
734 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
735 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
736 return ide_stopped;
737
738 /* use DMA, if possible */
739 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
740
741 if (write)
742 cd->devinfo.media_written = 1;
743
744 rq->timeout = ATAPI_WAIT_PC;
745
746 return ide_started;
747 }
748
749 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
750 {
751
752 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
753 rq->cmd[0], rq->cmd_type);
754
755 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
756 rq->cmd_flags |= REQ_QUIET;
757 else
758 rq->cmd_flags &= ~REQ_FAILED;
759
760 drive->dma = 0;
761
762 /* sg request */
763 if (rq->bio) {
764 struct request_queue *q = drive->queue;
765 char *buf = bio_data(rq->bio);
766 unsigned int alignment;
767
768 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
769
770 /*
771 * check if dma is safe
772 *
773 * NOTE! The "len" and "addr" checks should possibly have
774 * separate masks.
775 */
776 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
777 if ((unsigned long)buf & alignment
778 || blk_rq_bytes(rq) & q->dma_pad_mask
779 || object_is_on_stack(buf))
780 drive->dma = 0;
781 }
782 }
783
784 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
785 sector_t block)
786 {
787 struct ide_cmd cmd;
788 int uptodate = 0, nsectors;
789
790 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
791 rq->cmd[0], (unsigned long long)block);
792
793 if (drive->debug_mask & IDE_DBG_RQ)
794 blk_dump_rq_flags(rq, "ide_cd_do_request");
795
796 switch (rq->cmd_type) {
797 case REQ_TYPE_FS:
798 if (cdrom_start_rw(drive, rq) == ide_stopped)
799 goto out_end;
800 break;
801 case REQ_TYPE_SENSE:
802 case REQ_TYPE_BLOCK_PC:
803 case REQ_TYPE_ATA_PC:
804 if (!rq->timeout)
805 rq->timeout = ATAPI_WAIT_PC;
806
807 cdrom_do_block_pc(drive, rq);
808 break;
809 case REQ_TYPE_SPECIAL:
810 /* right now this can only be a reset... */
811 uptodate = 1;
812 goto out_end;
813 default:
814 BUG();
815 }
816
817 /* prepare sense request for this command */
818 ide_prep_sense(drive, rq);
819
820 memset(&cmd, 0, sizeof(cmd));
821
822 if (rq_data_dir(rq))
823 cmd.tf_flags |= IDE_TFLAG_WRITE;
824
825 cmd.rq = rq;
826
827 if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
828 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
829 ide_map_sg(drive, &cmd);
830 }
831
832 return ide_issue_pc(drive, &cmd);
833 out_end:
834 nsectors = blk_rq_sectors(rq);
835
836 if (nsectors == 0)
837 nsectors = 1;
838
839 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
840
841 return ide_stopped;
842 }
843
844 /*
845 * Ioctl handling.
846 *
847 * Routines which queue packet commands take as a final argument a pointer to a
848 * request_sense struct. If execution of the command results in an error with a
849 * CHECK CONDITION status, this structure will be filled with the results of the
850 * subsequent request sense command. The pointer can also be NULL, in which case
851 * no sense information is returned.
852 */
853 static void msf_from_bcd(struct atapi_msf *msf)
854 {
855 msf->minute = bcd2bin(msf->minute);
856 msf->second = bcd2bin(msf->second);
857 msf->frame = bcd2bin(msf->frame);
858 }
859
860 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
861 {
862 struct cdrom_info *info = drive->driver_data;
863 struct cdrom_device_info *cdi = &info->devinfo;
864 unsigned char cmd[BLK_MAX_CDB];
865
866 ide_debug_log(IDE_DBG_FUNC, "enter");
867
868 memset(cmd, 0, BLK_MAX_CDB);
869 cmd[0] = GPCMD_TEST_UNIT_READY;
870
871 /*
872 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
873 * instead of supporting the LOAD_UNLOAD opcode.
874 */
875 cmd[7] = cdi->sanyo_slot % 3;
876
877 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
878 }
879
880 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
881 unsigned long *sectors_per_frame,
882 struct request_sense *sense)
883 {
884 struct {
885 __be32 lba;
886 __be32 blocklen;
887 } capbuf;
888
889 int stat;
890 unsigned char cmd[BLK_MAX_CDB];
891 unsigned len = sizeof(capbuf);
892 u32 blocklen;
893
894 ide_debug_log(IDE_DBG_FUNC, "enter");
895
896 memset(cmd, 0, BLK_MAX_CDB);
897 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
898
899 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
900 REQ_QUIET);
901 if (stat)
902 return stat;
903
904 /*
905 * Sanity check the given block size, in so far as making
906 * sure the sectors_per_frame we give to the caller won't
907 * end up being bogus.
908 */
909 blocklen = be32_to_cpu(capbuf.blocklen);
910 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
911 switch (blocklen) {
912 case 512:
913 case 1024:
914 case 2048:
915 case 4096:
916 break;
917 default:
918 printk_once(KERN_ERR PFX "%s: weird block size %u; "
919 "setting default block size to 2048\n",
920 drive->name, blocklen);
921 blocklen = 2048;
922 break;
923 }
924
925 *capacity = 1 + be32_to_cpu(capbuf.lba);
926 *sectors_per_frame = blocklen >> SECTOR_BITS;
927
928 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
929 *capacity, *sectors_per_frame);
930
931 return 0;
932 }
933
934 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
935 int format, char *buf, int buflen,
936 struct request_sense *sense)
937 {
938 unsigned char cmd[BLK_MAX_CDB];
939
940 ide_debug_log(IDE_DBG_FUNC, "enter");
941
942 memset(cmd, 0, BLK_MAX_CDB);
943
944 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
945 cmd[6] = trackno;
946 cmd[7] = (buflen >> 8);
947 cmd[8] = (buflen & 0xff);
948 cmd[9] = (format << 6);
949
950 if (msf_flag)
951 cmd[1] = 2;
952
953 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
954 }
955
956 /* Try to read the entire TOC for the disk into our internal buffer. */
957 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
958 {
959 int stat, ntracks, i;
960 struct cdrom_info *info = drive->driver_data;
961 struct cdrom_device_info *cdi = &info->devinfo;
962 struct atapi_toc *toc = info->toc;
963 struct {
964 struct atapi_toc_header hdr;
965 struct atapi_toc_entry ent;
966 } ms_tmp;
967 long last_written;
968 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
969
970 ide_debug_log(IDE_DBG_FUNC, "enter");
971
972 if (toc == NULL) {
973 /* try to allocate space */
974 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
975 if (toc == NULL) {
976 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
977 drive->name);
978 return -ENOMEM;
979 }
980 info->toc = toc;
981 }
982
983 /*
984 * Check to see if the existing data is still valid. If it is,
985 * just return.
986 */
987 (void) cdrom_check_status(drive, sense);
988
989 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
990 return 0;
991
992 /* try to get the total cdrom capacity and sector size */
993 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
994 sense);
995 if (stat)
996 toc->capacity = 0x1fffff;
997
998 set_capacity(info->disk, toc->capacity * sectors_per_frame);
999 /* save a private copy of the TOC capacity for error handling */
1000 drive->probed_capacity = toc->capacity * sectors_per_frame;
1001
1002 blk_queue_logical_block_size(drive->queue,
1003 sectors_per_frame << SECTOR_BITS);
1004
1005 /* first read just the header, so we know how long the TOC is */
1006 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1007 sizeof(struct atapi_toc_header), sense);
1008 if (stat)
1009 return stat;
1010
1011 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1012 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1013 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1014 }
1015
1016 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1017 if (ntracks <= 0)
1018 return -EIO;
1019 if (ntracks > MAX_TRACKS)
1020 ntracks = MAX_TRACKS;
1021
1022 /* now read the whole schmeer */
1023 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1024 (char *)&toc->hdr,
1025 sizeof(struct atapi_toc_header) +
1026 (ntracks + 1) *
1027 sizeof(struct atapi_toc_entry), sense);
1028
1029 if (stat && toc->hdr.first_track > 1) {
1030 /*
1031 * Cds with CDI tracks only don't have any TOC entries, despite
1032 * of this the returned values are
1033 * first_track == last_track = number of CDI tracks + 1,
1034 * so that this case is indistinguishable from the same layout
1035 * plus an additional audio track. If we get an error for the
1036 * regular case, we assume a CDI without additional audio
1037 * tracks. In this case the readable TOC is empty (CDI tracks
1038 * are not included) and only holds the Leadout entry.
1039 *
1040 * Heiko Eißfeldt.
1041 */
1042 ntracks = 0;
1043 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1044 (char *)&toc->hdr,
1045 sizeof(struct atapi_toc_header) +
1046 (ntracks + 1) *
1047 sizeof(struct atapi_toc_entry),
1048 sense);
1049 if (stat)
1050 return stat;
1051
1052 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1053 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1054 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1055 } else {
1056 toc->hdr.first_track = CDROM_LEADOUT;
1057 toc->hdr.last_track = CDROM_LEADOUT;
1058 }
1059 }
1060
1061 if (stat)
1062 return stat;
1063
1064 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1065
1066 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1067 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1068 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1069 }
1070
1071 for (i = 0; i <= ntracks; i++) {
1072 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1073 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1074 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1075 msf_from_bcd(&toc->ent[i].addr.msf);
1076 }
1077 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1078 toc->ent[i].addr.msf.second,
1079 toc->ent[i].addr.msf.frame);
1080 }
1081
1082 if (toc->hdr.first_track != CDROM_LEADOUT) {
1083 /* read the multisession information */
1084 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1085 sizeof(ms_tmp), sense);
1086 if (stat)
1087 return stat;
1088
1089 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1090 } else {
1091 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1092 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1093 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1094 }
1095
1096 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1097 /* re-read multisession information using MSF format */
1098 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1099 sizeof(ms_tmp), sense);
1100 if (stat)
1101 return stat;
1102
1103 msf_from_bcd(&ms_tmp.ent.addr.msf);
1104 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1105 ms_tmp.ent.addr.msf.second,
1106 ms_tmp.ent.addr.msf.frame);
1107 }
1108
1109 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1110
1111 /* now try to get the total cdrom capacity */
1112 stat = cdrom_get_last_written(cdi, &last_written);
1113 if (!stat && (last_written > toc->capacity)) {
1114 toc->capacity = last_written;
1115 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1116 drive->probed_capacity = toc->capacity * sectors_per_frame;
1117 }
1118
1119 /* Remember that we've read this stuff. */
1120 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1121
1122 return 0;
1123 }
1124
1125 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1126 {
1127 struct cdrom_info *info = drive->driver_data;
1128 struct cdrom_device_info *cdi = &info->devinfo;
1129 struct packet_command cgc;
1130 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1131
1132 ide_debug_log(IDE_DBG_FUNC, "enter");
1133
1134 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1135 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1136
1137 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1138 do {
1139 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1140 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1141 if (!stat)
1142 break;
1143 } while (--attempts);
1144 return stat;
1145 }
1146
1147 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1148 {
1149 struct cdrom_info *cd = drive->driver_data;
1150 u16 curspeed, maxspeed;
1151
1152 ide_debug_log(IDE_DBG_FUNC, "enter");
1153
1154 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1155 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1156 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1157 } else {
1158 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1159 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1160 }
1161
1162 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1163 curspeed, maxspeed);
1164
1165 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1166 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1167 }
1168
1169 #define IDE_CD_CAPABILITIES \
1170 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1171 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1172 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1173 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1174 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1175
1176 static struct cdrom_device_ops ide_cdrom_dops = {
1177 .open = ide_cdrom_open_real,
1178 .release = ide_cdrom_release_real,
1179 .drive_status = ide_cdrom_drive_status,
1180 .check_events = ide_cdrom_check_events_real,
1181 .tray_move = ide_cdrom_tray_move,
1182 .lock_door = ide_cdrom_lock_door,
1183 .select_speed = ide_cdrom_select_speed,
1184 .get_last_session = ide_cdrom_get_last_session,
1185 .get_mcn = ide_cdrom_get_mcn,
1186 .reset = ide_cdrom_reset,
1187 .audio_ioctl = ide_cdrom_audio_ioctl,
1188 .capability = IDE_CD_CAPABILITIES,
1189 .generic_packet = ide_cdrom_packet,
1190 };
1191
1192 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1193 {
1194 struct cdrom_info *info = drive->driver_data;
1195 struct cdrom_device_info *devinfo = &info->devinfo;
1196
1197 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1198
1199 devinfo->ops = &ide_cdrom_dops;
1200 devinfo->speed = info->current_speed;
1201 devinfo->capacity = nslots;
1202 devinfo->handle = drive;
1203 strcpy(devinfo->name, drive->name);
1204
1205 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1206 devinfo->mask |= CDC_SELECT_SPEED;
1207
1208 devinfo->disk = info->disk;
1209 return register_cdrom(devinfo);
1210 }
1211
1212 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1213 {
1214 struct cdrom_info *cd = drive->driver_data;
1215 struct cdrom_device_info *cdi = &cd->devinfo;
1216 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1217 mechtype_t mechtype;
1218 int nslots = 1;
1219
1220 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1221 drive->media, drive->atapi_flags);
1222
1223 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1224 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1225 CDC_MO_DRIVE | CDC_RAM);
1226
1227 if (drive->media == ide_optical) {
1228 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1229 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1230 drive->name);
1231 return nslots;
1232 }
1233
1234 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1235 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1236 cdi->mask &= ~CDC_PLAY_AUDIO;
1237 return nslots;
1238 }
1239
1240 /*
1241 * We have to cheat a little here. the packet will eventually be queued
1242 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1243 * Since this device hasn't been registered with the Uniform layer yet,
1244 * it can't do this. Same goes for cdi->ops.
1245 */
1246 cdi->handle = drive;
1247 cdi->ops = &ide_cdrom_dops;
1248
1249 if (ide_cdrom_get_capabilities(drive, buf))
1250 return 0;
1251
1252 if ((buf[8 + 6] & 0x01) == 0)
1253 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1254 if (buf[8 + 6] & 0x08)
1255 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1256 if (buf[8 + 3] & 0x01)
1257 cdi->mask &= ~CDC_CD_R;
1258 if (buf[8 + 3] & 0x02)
1259 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1260 if (buf[8 + 2] & 0x38)
1261 cdi->mask &= ~CDC_DVD;
1262 if (buf[8 + 3] & 0x20)
1263 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1264 if (buf[8 + 3] & 0x10)
1265 cdi->mask &= ~CDC_DVD_R;
1266 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1267 cdi->mask &= ~CDC_PLAY_AUDIO;
1268
1269 mechtype = buf[8 + 6] >> 5;
1270 if (mechtype == mechtype_caddy ||
1271 mechtype == mechtype_popup ||
1272 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1273 cdi->mask |= CDC_CLOSE_TRAY;
1274
1275 if (cdi->sanyo_slot > 0) {
1276 cdi->mask &= ~CDC_SELECT_DISC;
1277 nslots = 3;
1278 } else if (mechtype == mechtype_individual_changer ||
1279 mechtype == mechtype_cartridge_changer) {
1280 nslots = cdrom_number_of_slots(cdi);
1281 if (nslots > 1)
1282 cdi->mask &= ~CDC_SELECT_DISC;
1283 }
1284
1285 ide_cdrom_update_speed(drive, buf);
1286
1287 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1288
1289 /* don't print speed if the drive reported 0 */
1290 if (cd->max_speed)
1291 printk(KERN_CONT " %dX", cd->max_speed);
1292
1293 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1294
1295 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1296 printk(KERN_CONT " DVD%s%s",
1297 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1298 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1299
1300 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1301 printk(KERN_CONT " CD%s%s",
1302 (cdi->mask & CDC_CD_R) ? "" : "-R",
1303 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1304
1305 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1306 printk(KERN_CONT " changer w/%d slots", nslots);
1307 else
1308 printk(KERN_CONT " drive");
1309
1310 printk(KERN_CONT ", %dkB Cache\n",
1311 be16_to_cpup((__be16 *)&buf[8 + 12]));
1312
1313 return nslots;
1314 }
1315
1316 /* standard prep_rq_fn that builds 10 byte cmds */
1317 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1318 {
1319 int hard_sect = queue_logical_block_size(q);
1320 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1321 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1322
1323 memset(rq->cmd, 0, BLK_MAX_CDB);
1324
1325 if (rq_data_dir(rq) == READ)
1326 rq->cmd[0] = GPCMD_READ_10;
1327 else
1328 rq->cmd[0] = GPCMD_WRITE_10;
1329
1330 /*
1331 * fill in lba
1332 */
1333 rq->cmd[2] = (block >> 24) & 0xff;
1334 rq->cmd[3] = (block >> 16) & 0xff;
1335 rq->cmd[4] = (block >> 8) & 0xff;
1336 rq->cmd[5] = block & 0xff;
1337
1338 /*
1339 * and transfer length
1340 */
1341 rq->cmd[7] = (blocks >> 8) & 0xff;
1342 rq->cmd[8] = blocks & 0xff;
1343 rq->cmd_len = 10;
1344 return BLKPREP_OK;
1345 }
1346
1347 /*
1348 * Most of the SCSI commands are supported directly by ATAPI devices.
1349 * This transform handles the few exceptions.
1350 */
1351 static int ide_cdrom_prep_pc(struct request *rq)
1352 {
1353 u8 *c = rq->cmd;
1354
1355 /* transform 6-byte read/write commands to the 10-byte version */
1356 if (c[0] == READ_6 || c[0] == WRITE_6) {
1357 c[8] = c[4];
1358 c[5] = c[3];
1359 c[4] = c[2];
1360 c[3] = c[1] & 0x1f;
1361 c[2] = 0;
1362 c[1] &= 0xe0;
1363 c[0] += (READ_10 - READ_6);
1364 rq->cmd_len = 10;
1365 return BLKPREP_OK;
1366 }
1367
1368 /*
1369 * it's silly to pretend we understand 6-byte sense commands, just
1370 * reject with ILLEGAL_REQUEST and the caller should take the
1371 * appropriate action
1372 */
1373 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1374 rq->errors = ILLEGAL_REQUEST;
1375 return BLKPREP_KILL;
1376 }
1377
1378 return BLKPREP_OK;
1379 }
1380
1381 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1382 {
1383 if (rq->cmd_type == REQ_TYPE_FS)
1384 return ide_cdrom_prep_fs(q, rq);
1385 else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1386 return ide_cdrom_prep_pc(rq);
1387
1388 return 0;
1389 }
1390
1391 struct cd_list_entry {
1392 const char *id_model;
1393 const char *id_firmware;
1394 unsigned int cd_flags;
1395 };
1396
1397 #ifdef CONFIG_IDE_PROC_FS
1398 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1399 {
1400 unsigned long capacity, sectors_per_frame;
1401
1402 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1403 return 0;
1404
1405 return capacity * sectors_per_frame;
1406 }
1407
1408 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1409 {
1410 ide_drive_t *drive = m->private;
1411
1412 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1413 return 0;
1414 }
1415
1416 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1417 {
1418 return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1419 }
1420
1421 static const struct file_operations idecd_capacity_proc_fops = {
1422 .owner = THIS_MODULE,
1423 .open = idecd_capacity_proc_open,
1424 .read = seq_read,
1425 .llseek = seq_lseek,
1426 .release = single_release,
1427 };
1428
1429 static ide_proc_entry_t idecd_proc[] = {
1430 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1431 {}
1432 };
1433
1434 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1435 {
1436 return idecd_proc;
1437 }
1438
1439 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1440 {
1441 return NULL;
1442 }
1443 #endif
1444
1445 static const struct cd_list_entry ide_cd_quirks_list[] = {
1446 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1447 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1448 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1449 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1450 IDE_AFLAG_PRE_ATAPI12, },
1451 /* Vertos 300, some versions of this drive like to talk BCD. */
1452 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1453 /* Vertos 600 ESD. */
1454 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1455 /*
1456 * Sanyo 3 CD changer uses a non-standard command for CD changing
1457 * (by default standard ATAPI support for CD changers is used).
1458 */
1459 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1460 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1461 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1462 /* Stingray 8X CD-ROM. */
1463 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1464 /*
1465 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1466 * mode sense page capabilities size, but older drives break.
1467 */
1468 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1469 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1470 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1471 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1472 /*
1473 * Some drives used by Apple don't advertise audio play
1474 * but they do support reading TOC & audio datas.
1475 */
1476 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1477 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1478 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1479 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1480 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1481 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1482 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1483 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1484 { NULL, NULL, 0 }
1485 };
1486
1487 static unsigned int ide_cd_flags(u16 *id)
1488 {
1489 const struct cd_list_entry *cle = ide_cd_quirks_list;
1490
1491 while (cle->id_model) {
1492 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1493 (cle->id_firmware == NULL ||
1494 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1495 return cle->cd_flags;
1496 cle++;
1497 }
1498
1499 return 0;
1500 }
1501
1502 static int ide_cdrom_setup(ide_drive_t *drive)
1503 {
1504 struct cdrom_info *cd = drive->driver_data;
1505 struct cdrom_device_info *cdi = &cd->devinfo;
1506 struct request_queue *q = drive->queue;
1507 u16 *id = drive->id;
1508 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1509 int nslots;
1510
1511 ide_debug_log(IDE_DBG_PROBE, "enter");
1512
1513 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1514 blk_queue_dma_alignment(q, 31);
1515 blk_queue_update_dma_pad(q, 15);
1516
1517 q->unplug_delay = max((1 * HZ) / 1000, 1);
1518
1519 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1520 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1521
1522 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1523 fw_rev[4] == '1' && fw_rev[6] <= '2')
1524 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1525 IDE_AFLAG_TOCADDR_AS_BCD);
1526 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1527 fw_rev[4] == '1' && fw_rev[6] <= '2')
1528 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1529 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1530 /* 3 => use CD in slot 0 */
1531 cdi->sanyo_slot = 3;
1532
1533 nslots = ide_cdrom_probe_capabilities(drive);
1534
1535 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1536
1537 if (ide_cdrom_register(drive, nslots)) {
1538 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1539 " cdrom driver.\n", drive->name, __func__);
1540 cd->devinfo.handle = NULL;
1541 return 1;
1542 }
1543
1544 ide_proc_register_driver(drive, cd->driver);
1545 return 0;
1546 }
1547
1548 static void ide_cd_remove(ide_drive_t *drive)
1549 {
1550 struct cdrom_info *info = drive->driver_data;
1551
1552 ide_debug_log(IDE_DBG_FUNC, "enter");
1553
1554 ide_proc_unregister_driver(drive, info->driver);
1555 device_del(&info->dev);
1556 del_gendisk(info->disk);
1557
1558 mutex_lock(&idecd_ref_mutex);
1559 put_device(&info->dev);
1560 mutex_unlock(&idecd_ref_mutex);
1561 }
1562
1563 static void ide_cd_release(struct device *dev)
1564 {
1565 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1566 struct cdrom_device_info *devinfo = &info->devinfo;
1567 ide_drive_t *drive = info->drive;
1568 struct gendisk *g = info->disk;
1569
1570 ide_debug_log(IDE_DBG_FUNC, "enter");
1571
1572 kfree(info->toc);
1573 if (devinfo->handle == drive)
1574 unregister_cdrom(devinfo);
1575 drive->driver_data = NULL;
1576 blk_queue_prep_rq(drive->queue, NULL);
1577 g->private_data = NULL;
1578 put_disk(g);
1579 kfree(info);
1580 }
1581
1582 static int ide_cd_probe(ide_drive_t *);
1583
1584 static struct ide_driver ide_cdrom_driver = {
1585 .gen_driver = {
1586 .owner = THIS_MODULE,
1587 .name = "ide-cdrom",
1588 .bus = &ide_bus_type,
1589 },
1590 .probe = ide_cd_probe,
1591 .remove = ide_cd_remove,
1592 .version = IDECD_VERSION,
1593 .do_request = ide_cd_do_request,
1594 #ifdef CONFIG_IDE_PROC_FS
1595 .proc_entries = ide_cd_proc_entries,
1596 .proc_devsets = ide_cd_proc_devsets,
1597 #endif
1598 };
1599
1600 static int idecd_open(struct block_device *bdev, fmode_t mode)
1601 {
1602 struct cdrom_info *info;
1603 int rc = -ENXIO;
1604
1605 mutex_lock(&ide_cd_mutex);
1606 info = ide_cd_get(bdev->bd_disk);
1607 if (!info)
1608 goto out;
1609
1610 rc = cdrom_open(&info->devinfo, bdev, mode);
1611 if (rc < 0)
1612 ide_cd_put(info);
1613 out:
1614 mutex_unlock(&ide_cd_mutex);
1615 return rc;
1616 }
1617
1618 static int idecd_release(struct gendisk *disk, fmode_t mode)
1619 {
1620 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1621
1622 mutex_lock(&ide_cd_mutex);
1623 cdrom_release(&info->devinfo, mode);
1624
1625 ide_cd_put(info);
1626 mutex_unlock(&ide_cd_mutex);
1627
1628 return 0;
1629 }
1630
1631 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1632 {
1633 struct packet_command cgc;
1634 char buffer[16];
1635 int stat;
1636 char spindown;
1637
1638 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1639 return -EFAULT;
1640
1641 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1642
1643 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1644 if (stat)
1645 return stat;
1646
1647 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1648 return cdrom_mode_select(cdi, &cgc);
1649 }
1650
1651 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1652 {
1653 struct packet_command cgc;
1654 char buffer[16];
1655 int stat;
1656 char spindown;
1657
1658 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1659
1660 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1661 if (stat)
1662 return stat;
1663
1664 spindown = buffer[11] & 0x0f;
1665 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1666 return -EFAULT;
1667 return 0;
1668 }
1669
1670 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1671 unsigned int cmd, unsigned long arg)
1672 {
1673 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1674 int err;
1675
1676 switch (cmd) {
1677 case CDROMSETSPINDOWN:
1678 return idecd_set_spindown(&info->devinfo, arg);
1679 case CDROMGETSPINDOWN:
1680 return idecd_get_spindown(&info->devinfo, arg);
1681 default:
1682 break;
1683 }
1684
1685 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1686 if (err == -EINVAL)
1687 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1688
1689 return err;
1690 }
1691
1692 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1693 unsigned int cmd, unsigned long arg)
1694 {
1695 int ret;
1696
1697 mutex_lock(&ide_cd_mutex);
1698 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1699 mutex_unlock(&ide_cd_mutex);
1700
1701 return ret;
1702 }
1703
1704
1705 static unsigned int idecd_check_events(struct gendisk *disk,
1706 unsigned int clearing)
1707 {
1708 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1709 return cdrom_check_events(&info->devinfo, clearing);
1710 }
1711
1712 static int idecd_revalidate_disk(struct gendisk *disk)
1713 {
1714 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1715 struct request_sense sense;
1716
1717 ide_cd_read_toc(info->drive, &sense);
1718
1719 return 0;
1720 }
1721
1722 static const struct block_device_operations idecd_ops = {
1723 .owner = THIS_MODULE,
1724 .open = idecd_open,
1725 .release = idecd_release,
1726 .ioctl = idecd_ioctl,
1727 .check_events = idecd_check_events,
1728 .revalidate_disk = idecd_revalidate_disk
1729 };
1730
1731 /* module options */
1732 static unsigned long debug_mask;
1733 module_param(debug_mask, ulong, 0644);
1734
1735 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1736
1737 static int ide_cd_probe(ide_drive_t *drive)
1738 {
1739 struct cdrom_info *info;
1740 struct gendisk *g;
1741 struct request_sense sense;
1742
1743 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1744 drive->driver_req, drive->media);
1745
1746 if (!strstr("ide-cdrom", drive->driver_req))
1747 goto failed;
1748
1749 if (drive->media != ide_cdrom && drive->media != ide_optical)
1750 goto failed;
1751
1752 drive->debug_mask = debug_mask;
1753 drive->irq_handler = cdrom_newpc_intr;
1754
1755 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1756 if (info == NULL) {
1757 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1758 drive->name);
1759 goto failed;
1760 }
1761
1762 g = alloc_disk(1 << PARTN_BITS);
1763 if (!g)
1764 goto out_free_cd;
1765
1766 ide_init_disk(g, drive);
1767
1768 info->dev.parent = &drive->gendev;
1769 info->dev.release = ide_cd_release;
1770 dev_set_name(&info->dev, dev_name(&drive->gendev));
1771
1772 if (device_register(&info->dev))
1773 goto out_free_disk;
1774
1775 info->drive = drive;
1776 info->driver = &ide_cdrom_driver;
1777 info->disk = g;
1778
1779 g->private_data = &info->driver;
1780
1781 drive->driver_data = info;
1782
1783 g->minors = 1;
1784 g->driverfs_dev = &drive->gendev;
1785 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1786 if (ide_cdrom_setup(drive)) {
1787 put_device(&info->dev);
1788 goto failed;
1789 }
1790
1791 ide_cd_read_toc(drive, &sense);
1792 g->fops = &idecd_ops;
1793 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1794 g->events = DISK_EVENT_MEDIA_CHANGE;
1795 add_disk(g);
1796 return 0;
1797
1798 out_free_disk:
1799 put_disk(g);
1800 out_free_cd:
1801 kfree(info);
1802 failed:
1803 return -ENODEV;
1804 }
1805
1806 static void __exit ide_cdrom_exit(void)
1807 {
1808 driver_unregister(&ide_cdrom_driver.gen_driver);
1809 }
1810
1811 static int __init ide_cdrom_init(void)
1812 {
1813 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1814 return driver_register(&ide_cdrom_driver.gen_driver);
1815 }
1816
1817 MODULE_ALIAS("ide:*m-cdrom*");
1818 MODULE_ALIAS("ide-cd");
1819 module_init(ide_cdrom_init);
1820 module_exit(ide_cdrom_exit);
1821 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree