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ide-cd: convert to using generic sense request
[linux-2.6/kvm.git] / drivers / ide / ide-cd.c
blob061d7bbcd34a328b950b59618b2d297b605f4fbc
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 get_device(&cd->dev);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 put_device(&cd->dev);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 switch (sense->sense_key) {
106 case NO_SENSE:
107 case RECOVERED_ERROR:
108 break;
109 case NOT_READY:
110 /*
111 * don't care about tray state messages for e.g. capacity
112 * commands or in-progress or becoming ready
113 */
114 if (sense->asc == 0x3a || sense->asc == 0x04)
115 break;
116 log = 1;
117 break;
118 case ILLEGAL_REQUEST:
119 /*
120 * don't log START_STOP unit with LoEj set, since we cannot
121 * reliably check if drive can auto-close
122 */
123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124 break;
125 log = 1;
126 break;
127 case UNIT_ATTENTION:
128 /*
129 * Make good and sure we've seen this potential media change.
130 * Some drives (i.e. Creative) fail to present the correct sense
131 * key in the error register.
132 */
133 cdrom_saw_media_change(drive);
134 break;
135 default:
136 log = 1;
137 break;
138 }
139 return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143 struct request *failed_command,
144 struct request_sense *sense)
145 {
146 unsigned long sector;
147 unsigned long bio_sectors;
148 struct cdrom_info *info = drive->driver_data;
149
150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151 sense->error_code, sense->sense_key);
152
153 if (failed_command)
154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155 failed_command->cmd[0]);
156
157 if (!cdrom_log_sense(drive, failed_command, sense))
158 return;
159
160 /*
161 * If a read toc is executed for a CD-R or CD-RW medium where the first
162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163 * confusing error)
164 */
165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167 return;
168
169 /* current error */
170 if (sense->error_code == 0x70) {
171 switch (sense->sense_key) {
172 case MEDIUM_ERROR:
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
175 if (!sense->valid)
176 break;
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
179 break;
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
184
185 if (drive->queue->hardsect_size == 2048)
186 /* device sector size is 2K */
187 sector <<= 2;
188
189 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190 sector &= ~(bio_sectors - 1);
191
192 /*
193 * The SCSI specification allows for the value
194 * returned by READ CAPACITY to be up to 75 2K
195 * sectors past the last readable block.
196 * Therefore, if we hit a medium error within the
197 * last 75 2K sectors, we decrease the saved size
198 * value.
199 */
200 if (sector < get_capacity(info->disk) &&
201 drive->probed_capacity - sector < 4 * 75)
202 set_capacity(info->disk, sector);
203 }
204 }
205
206 ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
210 {
211 /*
212 * For REQ_TYPE_SENSE, "rq->special" points to the original
213 * failed request
214 */
215 struct request *failed = (struct request *)rq->special;
216 struct request_sense *sense = &drive->sense_data;
217
218 if (failed) {
219 if (failed->sense) {
220 /*
221 * Sense is always read into drive->sense_data.
222 * Copy back if the failed request has its
223 * sense pointer set.
224 */
225 memcpy(failed->sense, sense, 18);
226 sense = failed->sense;
227 failed->sense_len = rq->sense_len;
228 }
229 cdrom_analyze_sense_data(drive, failed, sense);
230
231 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
232 BUG();
233 } else
234 cdrom_analyze_sense_data(drive, NULL, sense);
235 }
236
237
238 /*
239 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
240 * while flushing data from cache.
241 *
242 * returns: 0 failed (write timeout expired)
243 * 1 success
244 */
245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
246 {
247
248 struct cdrom_info *info = drive->driver_data;
249
250 if (!rq->errors)
251 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
252
253 rq->errors = 1;
254
255 if (time_after(jiffies, info->write_timeout))
256 return 0;
257 else {
258 struct request_queue *q = drive->queue;
259 unsigned long flags;
260
261 /*
262 * take a breather relying on the unplug timer to kick us again
263 */
264
265 spin_lock_irqsave(q->queue_lock, flags);
266 blk_plug_device(q);
267 spin_unlock_irqrestore(q->queue_lock, flags);
268
269 return 1;
270 }
271 }
272
273 /**
274 * Returns:
275 * 0: if the request should be continued.
276 * 1: if the request will be going through error recovery.
277 * 2: if the request should be ended.
278 */
279 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
280 {
281 ide_hwif_t *hwif = drive->hwif;
282 struct request *rq = hwif->rq;
283 int err, sense_key, do_end_request = 0;
284 u8 quiet = rq->cmd_flags & REQ_QUIET;
285
286 /* get the IDE error register */
287 err = ide_read_error(drive);
288 sense_key = err >> 4;
289
290 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
291 "stat 0x%x",
292 rq->cmd[0], rq->cmd_type, err, stat);
293
294 if (blk_sense_request(rq)) {
295 /*
296 * We got an error trying to get sense info from the drive
297 * (probably while trying to recover from a former error).
298 * Just give up.
299 */
300 rq->cmd_flags |= REQ_FAILED;
301 return 2;
302 }
303
304 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
305 if (blk_pc_request(rq) && !rq->errors)
306 rq->errors = SAM_STAT_CHECK_CONDITION;
307
308 if (blk_noretry_request(rq))
309 do_end_request = 1;
310
311 switch (sense_key) {
312 case NOT_READY:
313 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
314 if (ide_cd_breathe(drive, rq))
315 return 1;
316 } else {
317 cdrom_saw_media_change(drive);
318
319 if (blk_fs_request(rq) && !quiet)
320 printk(KERN_ERR PFX "%s: tray open\n",
321 drive->name);
322 }
323 do_end_request = 1;
324 break;
325 case UNIT_ATTENTION:
326 cdrom_saw_media_change(drive);
327
328 if (blk_fs_request(rq) == 0)
329 return 0;
330
331 /*
332 * Arrange to retry the request but be sure to give up if we've
333 * retried too many times.
334 */
335 if (++rq->errors > ERROR_MAX)
336 do_end_request = 1;
337 break;
338 case ILLEGAL_REQUEST:
339 /*
340 * Don't print error message for this condition -- SFF8090i
341 * indicates that 5/24/00 is the correct response to a request
342 * to close the tray if the drive doesn't have that capability.
343 *
344 * cdrom_log_sense() knows this!
345 */
346 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
347 break;
348 /* fall-through */
349 case DATA_PROTECT:
350 /*
351 * No point in retrying after an illegal request or data
352 * protect error.
353 */
354 if (!quiet)
355 ide_dump_status(drive, "command error", stat);
356 do_end_request = 1;
357 break;
358 case MEDIUM_ERROR:
359 /*
360 * No point in re-trying a zillion times on a bad sector.
361 * If we got here the error is not correctable.
362 */
363 if (!quiet)
364 ide_dump_status(drive, "media error "
365 "(bad sector)", stat);
366 do_end_request = 1;
367 break;
368 case BLANK_CHECK:
369 /* disk appears blank? */
370 if (!quiet)
371 ide_dump_status(drive, "media error (blank)",
372 stat);
373 do_end_request = 1;
374 break;
375 default:
376 if (blk_fs_request(rq) == 0)
377 break;
378 if (err & ~ATA_ABORTED) {
379 /* go to the default handler for other errors */
380 ide_error(drive, "cdrom_decode_status", stat);
381 return 1;
382 } else if (++rq->errors > ERROR_MAX)
383 /* we've racked up too many retries, abort */
384 do_end_request = 1;
385 }
386
387 if (blk_fs_request(rq) == 0) {
388 rq->cmd_flags |= REQ_FAILED;
389 do_end_request = 1;
390 }
391
392 /*
393 * End a request through request sense analysis when we have sense data.
394 * We need this in order to perform end of media processing.
395 */
396 if (do_end_request)
397 goto end_request;
398
399 /* if we got a CHECK_CONDITION status, queue a request sense command */
400 if (stat & ATA_ERR)
401 ide_queue_sense_rq(drive, NULL);
402 return 1;
403
404 end_request:
405 if (stat & ATA_ERR) {
406 struct request_queue *q = drive->queue;
407 unsigned long flags;
408
409 spin_lock_irqsave(q->queue_lock, flags);
410 blkdev_dequeue_request(rq);
411 spin_unlock_irqrestore(q->queue_lock, flags);
412
413 hwif->rq = NULL;
414
415 ide_queue_sense_rq(drive, rq);
416 return 1;
417 } else
418 return 2;
419 }
420
421 /*
422 * Check the contents of the interrupt reason register from the cdrom
423 * and attempt to recover if there are problems. Returns 0 if everything's
424 * ok; nonzero if the request has been terminated.
425 */
426 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
427 int len, int ireason, int rw)
428 {
429 ide_hwif_t *hwif = drive->hwif;
430
431 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
432
433 /*
434 * ireason == 0: the drive wants to receive data from us
435 * ireason == 2: the drive is expecting to transfer data to us
436 */
437 if (ireason == (!rw << 1))
438 return 0;
439 else if (ireason == (rw << 1)) {
440
441 /* whoops... */
442 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
443 drive->name, __func__);
444
445 ide_pad_transfer(drive, rw, len);
446 } else if (rw == 0 && ireason == 1) {
447 /*
448 * Some drives (ASUS) seem to tell us that status info is
449 * available. Just get it and ignore.
450 */
451 (void)hwif->tp_ops->read_status(hwif);
452 return 0;
453 } else {
454 /* drive wants a command packet, or invalid ireason... */
455 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
456 drive->name, __func__, ireason);
457 }
458
459 if (rq->cmd_type == REQ_TYPE_ATA_PC)
460 rq->cmd_flags |= REQ_FAILED;
461
462 return -1;
463 }
464
465 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
466 {
467 struct request *rq = cmd->rq;
468
469 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
470
471 /*
472 * Some of the trailing request sense fields are optional,
473 * and some drives don't send them. Sigh.
474 */
475 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
476 cmd->nleft > 0 && cmd->nleft <= 5)
477 cmd->nleft = 0;
478 }
479
480 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
481 int write, void *buffer, unsigned *bufflen,
482 struct request_sense *sense, int timeout,
483 unsigned int cmd_flags)
484 {
485 struct cdrom_info *info = drive->driver_data;
486 struct request_sense local_sense;
487 int retries = 10;
488 unsigned int flags = 0;
489
490 if (!sense)
491 sense = &local_sense;
492
493 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
494 "cmd_flags: 0x%x",
495 cmd[0], write, timeout, cmd_flags);
496
497 /* start of retry loop */
498 do {
499 struct request *rq;
500 int error;
501
502 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
503
504 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
505 rq->cmd_type = REQ_TYPE_ATA_PC;
506 rq->sense = sense;
507 rq->cmd_flags |= cmd_flags;
508 rq->timeout = timeout;
509 if (buffer) {
510 rq->data = buffer;
511 rq->data_len = *bufflen;
512 }
513
514 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
515
516 if (buffer)
517 *bufflen = rq->data_len;
518
519 flags = rq->cmd_flags;
520 blk_put_request(rq);
521
522 /*
523 * FIXME: we should probably abort/retry or something in case of
524 * failure.
525 */
526 if (flags & REQ_FAILED) {
527 /*
528 * The request failed. Retry if it was due to a unit
529 * attention status (usually means media was changed).
530 */
531 struct request_sense *reqbuf = sense;
532
533 if (reqbuf->sense_key == UNIT_ATTENTION)
534 cdrom_saw_media_change(drive);
535 else if (reqbuf->sense_key == NOT_READY &&
536 reqbuf->asc == 4 && reqbuf->ascq != 4) {
537 /*
538 * The drive is in the process of loading
539 * a disk. Retry, but wait a little to give
540 * the drive time to complete the load.
541 */
542 ssleep(2);
543 } else {
544 /* otherwise, don't retry */
545 retries = 0;
546 }
547 --retries;
548 }
549
550 /* end of retry loop */
551 } while ((flags & REQ_FAILED) && retries >= 0);
552
553 /* return an error if the command failed */
554 return (flags & REQ_FAILED) ? -EIO : 0;
555 }
556
557 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
558 {
559 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
560
561 if (cmd->tf_flags & IDE_TFLAG_WRITE)
562 nr_bytes -= cmd->last_xfer_len;
563
564 if (nr_bytes > 0)
565 ide_complete_rq(drive, 0, nr_bytes);
566 }
567
568 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
569 {
570 ide_hwif_t *hwif = drive->hwif;
571 struct ide_cmd *cmd = &hwif->cmd;
572 struct request *rq = hwif->rq;
573 ide_expiry_t *expiry = NULL;
574 int dma_error = 0, dma, thislen, uptodate = 0;
575 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
576 int sense = blk_sense_request(rq);
577 unsigned int timeout;
578 u16 len;
579 u8 ireason, stat;
580
581 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
582
583 /* check for errors */
584 dma = drive->dma;
585 if (dma) {
586 drive->dma = 0;
587 drive->waiting_for_dma = 0;
588 dma_error = hwif->dma_ops->dma_end(drive);
589 ide_dma_unmap_sg(drive, cmd);
590 if (dma_error) {
591 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
592 write ? "write" : "read");
593 ide_dma_off(drive);
594 }
595 }
596
597 /* check status */
598 stat = hwif->tp_ops->read_status(hwif);
599
600 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
601 rc = cdrom_decode_status(drive, stat);
602 if (rc) {
603 if (rc == 2)
604 goto out_end;
605 return ide_stopped;
606 }
607 }
608
609 /* using dma, transfer is complete now */
610 if (dma) {
611 if (dma_error)
612 return ide_error(drive, "dma error", stat);
613 uptodate = 1;
614 goto out_end;
615 }
616
617 ide_read_bcount_and_ireason(drive, &len, &ireason);
618
619 thislen = blk_fs_request(rq) ? len : cmd->nleft;
620 if (thislen > len)
621 thislen = len;
622
623 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
624 stat, thislen);
625
626 /* If DRQ is clear, the command has completed. */
627 if ((stat & ATA_DRQ) == 0) {
628 if (blk_fs_request(rq)) {
629 /*
630 * If we're not done reading/writing, complain.
631 * Otherwise, complete the command normally.
632 */
633 uptodate = 1;
634 if (cmd->nleft > 0) {
635 printk(KERN_ERR PFX "%s: %s: data underrun "
636 "(%u bytes)\n", drive->name, __func__,
637 cmd->nleft);
638 if (!write)
639 rq->cmd_flags |= REQ_FAILED;
640 uptodate = 0;
641 }
642 } else if (!blk_pc_request(rq)) {
643 ide_cd_request_sense_fixup(drive, cmd);
644 /* complain if we still have data left to transfer */
645 uptodate = cmd->nleft ? 0 : 1;
646 if (uptodate == 0)
647 rq->cmd_flags |= REQ_FAILED;
648 }
649 goto out_end;
650 }
651
652 /* check which way to transfer data */
653 rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
654 if (rc)
655 goto out_end;
656
657 cmd->last_xfer_len = 0;
658
659 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
660 "ireason: 0x%x",
661 rq->cmd_type, ireason);
662
663 /* transfer data */
664 while (thislen > 0) {
665 int blen = min_t(int, thislen, cmd->nleft);
666
667 if (cmd->nleft == 0)
668 break;
669
670 ide_pio_bytes(drive, cmd, write, blen);
671 cmd->last_xfer_len += blen;
672
673 thislen -= blen;
674 len -= blen;
675
676 if (sense && write == 0)
677 rq->sense_len += blen;
678 }
679
680 /* pad, if necessary */
681 if (len > 0) {
682 if (blk_fs_request(rq) == 0 || write == 0)
683 ide_pad_transfer(drive, write, len);
684 else {
685 printk(KERN_ERR PFX "%s: confused, missing data\n",
686 drive->name);
687 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
688 }
689 }
690
691 if (blk_pc_request(rq)) {
692 timeout = rq->timeout;
693 } else {
694 timeout = ATAPI_WAIT_PC;
695 if (!blk_fs_request(rq))
696 expiry = ide_cd_expiry;
697 }
698
699 hwif->expiry = expiry;
700 ide_set_handler(drive, cdrom_newpc_intr, timeout);
701 return ide_started;
702
703 out_end:
704 if (blk_pc_request(rq) && rc == 0) {
705 unsigned int dlen = rq->data_len;
706
707 rq->data_len = 0;
708
709 if (blk_end_request(rq, 0, dlen))
710 BUG();
711
712 hwif->rq = NULL;
713 } else {
714 if (sense && uptodate)
715 ide_cd_complete_failed_rq(drive, rq);
716
717 if (blk_fs_request(rq)) {
718 if (cmd->nleft == 0)
719 uptodate = 1;
720 } else {
721 if (uptodate <= 0 && rq->errors == 0)
722 rq->errors = -EIO;
723 }
724
725 if (uptodate == 0)
726 ide_cd_error_cmd(drive, cmd);
727
728 /* make sure it's fully ended */
729 if (blk_pc_request(rq))
730 nsectors = (rq->data_len + 511) >> 9;
731 else
732 nsectors = rq->hard_nr_sectors;
733
734 if (nsectors == 0)
735 nsectors = 1;
736
737 if (blk_fs_request(rq) == 0) {
738 rq->data_len -= (cmd->nbytes - cmd->nleft);
739 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
740 rq->data_len += cmd->last_xfer_len;
741 }
742
743 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
744
745 if (sense && rc == 2)
746 ide_error(drive, "request sense failure", stat);
747 }
748 return ide_stopped;
749 }
750
751 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
752 {
753 struct cdrom_info *cd = drive->driver_data;
754 struct request_queue *q = drive->queue;
755 int write = rq_data_dir(rq) == WRITE;
756 unsigned short sectors_per_frame =
757 queue_hardsect_size(q) >> SECTOR_BITS;
758
759 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
760 "secs_per_frame: %u",
761 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
762
763 if (write) {
764 /* disk has become write protected */
765 if (get_disk_ro(cd->disk))
766 return ide_stopped;
767 } else {
768 /*
769 * We may be retrying this request after an error. Fix up any
770 * weirdness which might be present in the request packet.
771 */
772 q->prep_rq_fn(q, rq);
773 }
774
775 /* fs requests *must* be hardware frame aligned */
776 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
777 (rq->sector & (sectors_per_frame - 1)))
778 return ide_stopped;
779
780 /* use DMA, if possible */
781 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
782
783 if (write)
784 cd->devinfo.media_written = 1;
785
786 rq->timeout = ATAPI_WAIT_PC;
787
788 return ide_started;
789 }
790
791 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
792 {
793
794 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
795 rq->cmd[0], rq->cmd_type);
796
797 if (blk_pc_request(rq))
798 rq->cmd_flags |= REQ_QUIET;
799 else
800 rq->cmd_flags &= ~REQ_FAILED;
801
802 drive->dma = 0;
803
804 /* sg request */
805 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
806 struct request_queue *q = drive->queue;
807 unsigned int alignment;
808 char *buf;
809
810 if (rq->bio)
811 buf = bio_data(rq->bio);
812 else
813 buf = rq->data;
814
815 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
816
817 /*
818 * check if dma is safe
819 *
820 * NOTE! The "len" and "addr" checks should possibly have
821 * separate masks.
822 */
823 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
824 if ((unsigned long)buf & alignment
825 || rq->data_len & q->dma_pad_mask
826 || object_is_on_stack(buf))
827 drive->dma = 0;
828 }
829 }
830
831 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
832 sector_t block)
833 {
834 struct ide_cmd cmd;
835 int uptodate = 0, nsectors;
836
837 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
838 rq->cmd[0], (unsigned long long)block);
839
840 if (drive->debug_mask & IDE_DBG_RQ)
841 blk_dump_rq_flags(rq, "ide_cd_do_request");
842
843 if (blk_fs_request(rq)) {
844 if (cdrom_start_rw(drive, rq) == ide_stopped)
845 goto out_end;
846 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
847 rq->cmd_type == REQ_TYPE_ATA_PC) {
848 if (!rq->timeout)
849 rq->timeout = ATAPI_WAIT_PC;
850
851 cdrom_do_block_pc(drive, rq);
852 } else if (blk_special_request(rq)) {
853 /* right now this can only be a reset... */
854 uptodate = 1;
855 goto out_end;
856 } else {
857 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
858 if (rq->errors == 0)
859 rq->errors = -EIO;
860 goto out_end;
861 }
862
863 /* prepare sense request for this command */
864 ide_prep_sense(drive, rq);
865
866 memset(&cmd, 0, sizeof(cmd));
867
868 if (rq_data_dir(rq))
869 cmd.tf_flags |= IDE_TFLAG_WRITE;
870
871 cmd.rq = rq;
872
873 if (blk_fs_request(rq) || rq->data_len) {
874 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
875 : rq->data_len);
876 ide_map_sg(drive, &cmd);
877 }
878
879 return ide_issue_pc(drive, &cmd);
880 out_end:
881 nsectors = rq->hard_nr_sectors;
882
883 if (nsectors == 0)
884 nsectors = 1;
885
886 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
887
888 return ide_stopped;
889 }
890
891 /*
892 * Ioctl handling.
893 *
894 * Routines which queue packet commands take as a final argument a pointer to a
895 * request_sense struct. If execution of the command results in an error with a
896 * CHECK CONDITION status, this structure will be filled with the results of the
897 * subsequent request sense command. The pointer can also be NULL, in which case
898 * no sense information is returned.
899 */
900 static void msf_from_bcd(struct atapi_msf *msf)
901 {
902 msf->minute = bcd2bin(msf->minute);
903 msf->second = bcd2bin(msf->second);
904 msf->frame = bcd2bin(msf->frame);
905 }
906
907 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
908 {
909 struct cdrom_info *info = drive->driver_data;
910 struct cdrom_device_info *cdi = &info->devinfo;
911 unsigned char cmd[BLK_MAX_CDB];
912
913 ide_debug_log(IDE_DBG_FUNC, "enter");
914
915 memset(cmd, 0, BLK_MAX_CDB);
916 cmd[0] = GPCMD_TEST_UNIT_READY;
917
918 /*
919 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
920 * instead of supporting the LOAD_UNLOAD opcode.
921 */
922 cmd[7] = cdi->sanyo_slot % 3;
923
924 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
925 }
926
927 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
928 unsigned long *sectors_per_frame,
929 struct request_sense *sense)
930 {
931 struct {
932 __be32 lba;
933 __be32 blocklen;
934 } capbuf;
935
936 int stat;
937 unsigned char cmd[BLK_MAX_CDB];
938 unsigned len = sizeof(capbuf);
939 u32 blocklen;
940
941 ide_debug_log(IDE_DBG_FUNC, "enter");
942
943 memset(cmd, 0, BLK_MAX_CDB);
944 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
945
946 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
947 REQ_QUIET);
948 if (stat)
949 return stat;
950
951 /*
952 * Sanity check the given block size
953 */
954 blocklen = be32_to_cpu(capbuf.blocklen);
955 switch (blocklen) {
956 case 512:
957 case 1024:
958 case 2048:
959 case 4096:
960 break;
961 default:
962 printk(KERN_ERR PFX "%s: weird block size %u\n",
963 drive->name, blocklen);
964 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
965 drive->name);
966 blocklen = 2048;
967 break;
968 }
969
970 *capacity = 1 + be32_to_cpu(capbuf.lba);
971 *sectors_per_frame = blocklen >> SECTOR_BITS;
972
973 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
974 *capacity, *sectors_per_frame);
975
976 return 0;
977 }
978
979 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
980 int format, char *buf, int buflen,
981 struct request_sense *sense)
982 {
983 unsigned char cmd[BLK_MAX_CDB];
984
985 ide_debug_log(IDE_DBG_FUNC, "enter");
986
987 memset(cmd, 0, BLK_MAX_CDB);
988
989 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
990 cmd[6] = trackno;
991 cmd[7] = (buflen >> 8);
992 cmd[8] = (buflen & 0xff);
993 cmd[9] = (format << 6);
994
995 if (msf_flag)
996 cmd[1] = 2;
997
998 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
999 }
1000
1001 /* Try to read the entire TOC for the disk into our internal buffer. */
1002 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1003 {
1004 int stat, ntracks, i;
1005 struct cdrom_info *info = drive->driver_data;
1006 struct cdrom_device_info *cdi = &info->devinfo;
1007 struct atapi_toc *toc = info->toc;
1008 struct {
1009 struct atapi_toc_header hdr;
1010 struct atapi_toc_entry ent;
1011 } ms_tmp;
1012 long last_written;
1013 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1014
1015 ide_debug_log(IDE_DBG_FUNC, "enter");
1016
1017 if (toc == NULL) {
1018 /* try to allocate space */
1019 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1020 if (toc == NULL) {
1021 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1022 drive->name);
1023 return -ENOMEM;
1024 }
1025 info->toc = toc;
1026 }
1027
1028 /*
1029 * Check to see if the existing data is still valid. If it is,
1030 * just return.
1031 */
1032 (void) cdrom_check_status(drive, sense);
1033
1034 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1035 return 0;
1036
1037 /* try to get the total cdrom capacity and sector size */
1038 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1039 sense);
1040 if (stat)
1041 toc->capacity = 0x1fffff;
1042
1043 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1044 /* save a private copy of the TOC capacity for error handling */
1045 drive->probed_capacity = toc->capacity * sectors_per_frame;
1046
1047 blk_queue_hardsect_size(drive->queue,
1048 sectors_per_frame << SECTOR_BITS);
1049
1050 /* first read just the header, so we know how long the TOC is */
1051 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1052 sizeof(struct atapi_toc_header), sense);
1053 if (stat)
1054 return stat;
1055
1056 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1057 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1058 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1059 }
1060
1061 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1062 if (ntracks <= 0)
1063 return -EIO;
1064 if (ntracks > MAX_TRACKS)
1065 ntracks = MAX_TRACKS;
1066
1067 /* now read the whole schmeer */
1068 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1069 (char *)&toc->hdr,
1070 sizeof(struct atapi_toc_header) +
1071 (ntracks + 1) *
1072 sizeof(struct atapi_toc_entry), sense);
1073
1074 if (stat && toc->hdr.first_track > 1) {
1075 /*
1076 * Cds with CDI tracks only don't have any TOC entries, despite
1077 * of this the returned values are
1078 * first_track == last_track = number of CDI tracks + 1,
1079 * so that this case is indistinguishable from the same layout
1080 * plus an additional audio track. If we get an error for the
1081 * regular case, we assume a CDI without additional audio
1082 * tracks. In this case the readable TOC is empty (CDI tracks
1083 * are not included) and only holds the Leadout entry.
1084 *
1085 * Heiko Eißfeldt.
1086 */
1087 ntracks = 0;
1088 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1089 (char *)&toc->hdr,
1090 sizeof(struct atapi_toc_header) +
1091 (ntracks + 1) *
1092 sizeof(struct atapi_toc_entry),
1093 sense);
1094 if (stat)
1095 return stat;
1096
1097 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1098 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1099 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1100 } else {
1101 toc->hdr.first_track = CDROM_LEADOUT;
1102 toc->hdr.last_track = CDROM_LEADOUT;
1103 }
1104 }
1105
1106 if (stat)
1107 return stat;
1108
1109 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1110
1111 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1112 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1113 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1114 }
1115
1116 for (i = 0; i <= ntracks; i++) {
1117 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1118 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1119 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1120 msf_from_bcd(&toc->ent[i].addr.msf);
1121 }
1122 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1123 toc->ent[i].addr.msf.second,
1124 toc->ent[i].addr.msf.frame);
1125 }
1126
1127 if (toc->hdr.first_track != CDROM_LEADOUT) {
1128 /* read the multisession information */
1129 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1130 sizeof(ms_tmp), sense);
1131 if (stat)
1132 return stat;
1133
1134 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1135 } else {
1136 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1137 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1138 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1139 }
1140
1141 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1142 /* re-read multisession information using MSF format */
1143 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1144 sizeof(ms_tmp), sense);
1145 if (stat)
1146 return stat;
1147
1148 msf_from_bcd(&ms_tmp.ent.addr.msf);
1149 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1150 ms_tmp.ent.addr.msf.second,
1151 ms_tmp.ent.addr.msf.frame);
1152 }
1153
1154 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1155
1156 /* now try to get the total cdrom capacity */
1157 stat = cdrom_get_last_written(cdi, &last_written);
1158 if (!stat && (last_written > toc->capacity)) {
1159 toc->capacity = last_written;
1160 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1161 drive->probed_capacity = toc->capacity * sectors_per_frame;
1162 }
1163
1164 /* Remember that we've read this stuff. */
1165 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1166
1167 return 0;
1168 }
1169
1170 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1171 {
1172 struct cdrom_info *info = drive->driver_data;
1173 struct cdrom_device_info *cdi = &info->devinfo;
1174 struct packet_command cgc;
1175 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1176
1177 ide_debug_log(IDE_DBG_FUNC, "enter");
1178
1179 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1180 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1181
1182 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1183 do {
1184 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1185 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1186 if (!stat)
1187 break;
1188 } while (--attempts);
1189 return stat;
1190 }
1191
1192 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1193 {
1194 struct cdrom_info *cd = drive->driver_data;
1195 u16 curspeed, maxspeed;
1196
1197 ide_debug_log(IDE_DBG_FUNC, "enter");
1198
1199 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1200 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1201 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1202 } else {
1203 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1204 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1205 }
1206
1207 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1208 curspeed, maxspeed);
1209
1210 cd->current_speed = (curspeed + (176/2)) / 176;
1211 cd->max_speed = (maxspeed + (176/2)) / 176;
1212 }
1213
1214 #define IDE_CD_CAPABILITIES \
1215 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1216 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1217 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1218 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1219 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1220
1221 static struct cdrom_device_ops ide_cdrom_dops = {
1222 .open = ide_cdrom_open_real,
1223 .release = ide_cdrom_release_real,
1224 .drive_status = ide_cdrom_drive_status,
1225 .media_changed = ide_cdrom_check_media_change_real,
1226 .tray_move = ide_cdrom_tray_move,
1227 .lock_door = ide_cdrom_lock_door,
1228 .select_speed = ide_cdrom_select_speed,
1229 .get_last_session = ide_cdrom_get_last_session,
1230 .get_mcn = ide_cdrom_get_mcn,
1231 .reset = ide_cdrom_reset,
1232 .audio_ioctl = ide_cdrom_audio_ioctl,
1233 .capability = IDE_CD_CAPABILITIES,
1234 .generic_packet = ide_cdrom_packet,
1235 };
1236
1237 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1238 {
1239 struct cdrom_info *info = drive->driver_data;
1240 struct cdrom_device_info *devinfo = &info->devinfo;
1241
1242 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1243
1244 devinfo->ops = &ide_cdrom_dops;
1245 devinfo->speed = info->current_speed;
1246 devinfo->capacity = nslots;
1247 devinfo->handle = drive;
1248 strcpy(devinfo->name, drive->name);
1249
1250 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1251 devinfo->mask |= CDC_SELECT_SPEED;
1252
1253 devinfo->disk = info->disk;
1254 return register_cdrom(devinfo);
1255 }
1256
1257 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1258 {
1259 struct cdrom_info *cd = drive->driver_data;
1260 struct cdrom_device_info *cdi = &cd->devinfo;
1261 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1262 mechtype_t mechtype;
1263 int nslots = 1;
1264
1265 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1266 drive->media, drive->atapi_flags);
1267
1268 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1269 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1270 CDC_MO_DRIVE | CDC_RAM);
1271
1272 if (drive->media == ide_optical) {
1273 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1274 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1275 drive->name);
1276 return nslots;
1277 }
1278
1279 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1280 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1281 cdi->mask &= ~CDC_PLAY_AUDIO;
1282 return nslots;
1283 }
1284
1285 /*
1286 * We have to cheat a little here. the packet will eventually be queued
1287 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1288 * Since this device hasn't been registered with the Uniform layer yet,
1289 * it can't do this. Same goes for cdi->ops.
1290 */
1291 cdi->handle = drive;
1292 cdi->ops = &ide_cdrom_dops;
1293
1294 if (ide_cdrom_get_capabilities(drive, buf))
1295 return 0;
1296
1297 if ((buf[8 + 6] & 0x01) == 0)
1298 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1299 if (buf[8 + 6] & 0x08)
1300 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1301 if (buf[8 + 3] & 0x01)
1302 cdi->mask &= ~CDC_CD_R;
1303 if (buf[8 + 3] & 0x02)
1304 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1305 if (buf[8 + 2] & 0x38)
1306 cdi->mask &= ~CDC_DVD;
1307 if (buf[8 + 3] & 0x20)
1308 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1309 if (buf[8 + 3] & 0x10)
1310 cdi->mask &= ~CDC_DVD_R;
1311 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1312 cdi->mask &= ~CDC_PLAY_AUDIO;
1313
1314 mechtype = buf[8 + 6] >> 5;
1315 if (mechtype == mechtype_caddy ||
1316 mechtype == mechtype_popup ||
1317 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1318 cdi->mask |= CDC_CLOSE_TRAY;
1319
1320 if (cdi->sanyo_slot > 0) {
1321 cdi->mask &= ~CDC_SELECT_DISC;
1322 nslots = 3;
1323 } else if (mechtype == mechtype_individual_changer ||
1324 mechtype == mechtype_cartridge_changer) {
1325 nslots = cdrom_number_of_slots(cdi);
1326 if (nslots > 1)
1327 cdi->mask &= ~CDC_SELECT_DISC;
1328 }
1329
1330 ide_cdrom_update_speed(drive, buf);
1331
1332 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1333
1334 /* don't print speed if the drive reported 0 */
1335 if (cd->max_speed)
1336 printk(KERN_CONT " %dX", cd->max_speed);
1337
1338 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1339
1340 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1341 printk(KERN_CONT " DVD%s%s",
1342 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1343 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1344
1345 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1346 printk(KERN_CONT " CD%s%s",
1347 (cdi->mask & CDC_CD_R) ? "" : "-R",
1348 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1349
1350 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1351 printk(KERN_CONT " changer w/%d slots", nslots);
1352 else
1353 printk(KERN_CONT " drive");
1354
1355 printk(KERN_CONT ", %dkB Cache\n",
1356 be16_to_cpup((__be16 *)&buf[8 + 12]));
1357
1358 return nslots;
1359 }
1360
1361 /* standard prep_rq_fn that builds 10 byte cmds */
1362 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1363 {
1364 int hard_sect = queue_hardsect_size(q);
1365 long block = (long)rq->hard_sector / (hard_sect >> 9);
1366 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1367
1368 memset(rq->cmd, 0, BLK_MAX_CDB);
1369
1370 if (rq_data_dir(rq) == READ)
1371 rq->cmd[0] = GPCMD_READ_10;
1372 else
1373 rq->cmd[0] = GPCMD_WRITE_10;
1374
1375 /*
1376 * fill in lba
1377 */
1378 rq->cmd[2] = (block >> 24) & 0xff;
1379 rq->cmd[3] = (block >> 16) & 0xff;
1380 rq->cmd[4] = (block >> 8) & 0xff;
1381 rq->cmd[5] = block & 0xff;
1382
1383 /*
1384 * and transfer length
1385 */
1386 rq->cmd[7] = (blocks >> 8) & 0xff;
1387 rq->cmd[8] = blocks & 0xff;
1388 rq->cmd_len = 10;
1389 return BLKPREP_OK;
1390 }
1391
1392 /*
1393 * Most of the SCSI commands are supported directly by ATAPI devices.
1394 * This transform handles the few exceptions.
1395 */
1396 static int ide_cdrom_prep_pc(struct request *rq)
1397 {
1398 u8 *c = rq->cmd;
1399
1400 /* transform 6-byte read/write commands to the 10-byte version */
1401 if (c[0] == READ_6 || c[0] == WRITE_6) {
1402 c[8] = c[4];
1403 c[5] = c[3];
1404 c[4] = c[2];
1405 c[3] = c[1] & 0x1f;
1406 c[2] = 0;
1407 c[1] &= 0xe0;
1408 c[0] += (READ_10 - READ_6);
1409 rq->cmd_len = 10;
1410 return BLKPREP_OK;
1411 }
1412
1413 /*
1414 * it's silly to pretend we understand 6-byte sense commands, just
1415 * reject with ILLEGAL_REQUEST and the caller should take the
1416 * appropriate action
1417 */
1418 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1419 rq->errors = ILLEGAL_REQUEST;
1420 return BLKPREP_KILL;
1421 }
1422
1423 return BLKPREP_OK;
1424 }
1425
1426 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1427 {
1428 if (blk_fs_request(rq))
1429 return ide_cdrom_prep_fs(q, rq);
1430 else if (blk_pc_request(rq))
1431 return ide_cdrom_prep_pc(rq);
1432
1433 return 0;
1434 }
1435
1436 struct cd_list_entry {
1437 const char *id_model;
1438 const char *id_firmware;
1439 unsigned int cd_flags;
1440 };
1441
1442 #ifdef CONFIG_IDE_PROC_FS
1443 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1444 {
1445 unsigned long capacity, sectors_per_frame;
1446
1447 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1448 return 0;
1449
1450 return capacity * sectors_per_frame;
1451 }
1452
1453 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1454 int count, int *eof, void *data)
1455 {
1456 ide_drive_t *drive = data;
1457 int len;
1458
1459 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1460 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1461 }
1462
1463 static ide_proc_entry_t idecd_proc[] = {
1464 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1465 { NULL, 0, NULL, NULL }
1466 };
1467
1468 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1469 {
1470 return idecd_proc;
1471 }
1472
1473 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1474 {
1475 return NULL;
1476 }
1477 #endif
1478
1479 static const struct cd_list_entry ide_cd_quirks_list[] = {
1480 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1481 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1482 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1483 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1484 IDE_AFLAG_PRE_ATAPI12, },
1485 /* Vertos 300, some versions of this drive like to talk BCD. */
1486 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1487 /* Vertos 600 ESD. */
1488 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1489 /*
1490 * Sanyo 3 CD changer uses a non-standard command for CD changing
1491 * (by default standard ATAPI support for CD changers is used).
1492 */
1493 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1494 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1495 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1496 /* Stingray 8X CD-ROM. */
1497 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1498 /*
1499 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1500 * mode sense page capabilities size, but older drives break.
1501 */
1502 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1503 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1504 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1505 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1506 /*
1507 * Some drives used by Apple don't advertise audio play
1508 * but they do support reading TOC & audio datas.
1509 */
1510 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1511 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1512 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1513 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1514 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1515 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1516 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1517 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1518 { NULL, NULL, 0 }
1519 };
1520
1521 static unsigned int ide_cd_flags(u16 *id)
1522 {
1523 const struct cd_list_entry *cle = ide_cd_quirks_list;
1524
1525 while (cle->id_model) {
1526 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1527 (cle->id_firmware == NULL ||
1528 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1529 return cle->cd_flags;
1530 cle++;
1531 }
1532
1533 return 0;
1534 }
1535
1536 static int ide_cdrom_setup(ide_drive_t *drive)
1537 {
1538 struct cdrom_info *cd = drive->driver_data;
1539 struct cdrom_device_info *cdi = &cd->devinfo;
1540 struct request_queue *q = drive->queue;
1541 u16 *id = drive->id;
1542 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1543 int nslots;
1544
1545 ide_debug_log(IDE_DBG_PROBE, "enter");
1546
1547 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1548 blk_queue_dma_alignment(q, 31);
1549 blk_queue_update_dma_pad(q, 15);
1550
1551 q->unplug_delay = max((1 * HZ) / 1000, 1);
1552
1553 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1554 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1555
1556 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1557 fw_rev[4] == '1' && fw_rev[6] <= '2')
1558 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1559 IDE_AFLAG_TOCADDR_AS_BCD);
1560 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1561 fw_rev[4] == '1' && fw_rev[6] <= '2')
1562 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1563 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1564 /* 3 => use CD in slot 0 */
1565 cdi->sanyo_slot = 3;
1566
1567 nslots = ide_cdrom_probe_capabilities(drive);
1568
1569 blk_queue_hardsect_size(q, CD_FRAMESIZE);
1570
1571 if (ide_cdrom_register(drive, nslots)) {
1572 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1573 " cdrom driver.\n", drive->name, __func__);
1574 cd->devinfo.handle = NULL;
1575 return 1;
1576 }
1577
1578 ide_proc_register_driver(drive, cd->driver);
1579 return 0;
1580 }
1581
1582 static void ide_cd_remove(ide_drive_t *drive)
1583 {
1584 struct cdrom_info *info = drive->driver_data;
1585
1586 ide_debug_log(IDE_DBG_FUNC, "enter");
1587
1588 ide_proc_unregister_driver(drive, info->driver);
1589 device_del(&info->dev);
1590 del_gendisk(info->disk);
1591
1592 mutex_lock(&idecd_ref_mutex);
1593 put_device(&info->dev);
1594 mutex_unlock(&idecd_ref_mutex);
1595 }
1596
1597 static void ide_cd_release(struct device *dev)
1598 {
1599 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1600 struct cdrom_device_info *devinfo = &info->devinfo;
1601 ide_drive_t *drive = info->drive;
1602 struct gendisk *g = info->disk;
1603
1604 ide_debug_log(IDE_DBG_FUNC, "enter");
1605
1606 kfree(info->toc);
1607 if (devinfo->handle == drive)
1608 unregister_cdrom(devinfo);
1609 drive->driver_data = NULL;
1610 blk_queue_prep_rq(drive->queue, NULL);
1611 g->private_data = NULL;
1612 put_disk(g);
1613 kfree(info);
1614 }
1615
1616 static int ide_cd_probe(ide_drive_t *);
1617
1618 static struct ide_driver ide_cdrom_driver = {
1619 .gen_driver = {
1620 .owner = THIS_MODULE,
1621 .name = "ide-cdrom",
1622 .bus = &ide_bus_type,
1623 },
1624 .probe = ide_cd_probe,
1625 .remove = ide_cd_remove,
1626 .version = IDECD_VERSION,
1627 .do_request = ide_cd_do_request,
1628 #ifdef CONFIG_IDE_PROC_FS
1629 .proc_entries = ide_cd_proc_entries,
1630 .proc_devsets = ide_cd_proc_devsets,
1631 #endif
1632 };
1633
1634 static int idecd_open(struct block_device *bdev, fmode_t mode)
1635 {
1636 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1637 int rc = -ENOMEM;
1638
1639 if (!info)
1640 return -ENXIO;
1641
1642 rc = cdrom_open(&info->devinfo, bdev, mode);
1643
1644 if (rc < 0)
1645 ide_cd_put(info);
1646
1647 return rc;
1648 }
1649
1650 static int idecd_release(struct gendisk *disk, fmode_t mode)
1651 {
1652 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1653
1654 cdrom_release(&info->devinfo, mode);
1655
1656 ide_cd_put(info);
1657
1658 return 0;
1659 }
1660
1661 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1662 {
1663 struct packet_command cgc;
1664 char buffer[16];
1665 int stat;
1666 char spindown;
1667
1668 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1669 return -EFAULT;
1670
1671 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1672
1673 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1674 if (stat)
1675 return stat;
1676
1677 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1678 return cdrom_mode_select(cdi, &cgc);
1679 }
1680
1681 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1682 {
1683 struct packet_command cgc;
1684 char buffer[16];
1685 int stat;
1686 char spindown;
1687
1688 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1689
1690 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1691 if (stat)
1692 return stat;
1693
1694 spindown = buffer[11] & 0x0f;
1695 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1696 return -EFAULT;
1697 return 0;
1698 }
1699
1700 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1701 unsigned int cmd, unsigned long arg)
1702 {
1703 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1704 int err;
1705
1706 switch (cmd) {
1707 case CDROMSETSPINDOWN:
1708 return idecd_set_spindown(&info->devinfo, arg);
1709 case CDROMGETSPINDOWN:
1710 return idecd_get_spindown(&info->devinfo, arg);
1711 default:
1712 break;
1713 }
1714
1715 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1716 if (err == -EINVAL)
1717 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1718
1719 return err;
1720 }
1721
1722 static int idecd_media_changed(struct gendisk *disk)
1723 {
1724 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1725 return cdrom_media_changed(&info->devinfo);
1726 }
1727
1728 static int idecd_revalidate_disk(struct gendisk *disk)
1729 {
1730 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1731 struct request_sense sense;
1732
1733 ide_cd_read_toc(info->drive, &sense);
1734
1735 return 0;
1736 }
1737
1738 static struct block_device_operations idecd_ops = {
1739 .owner = THIS_MODULE,
1740 .open = idecd_open,
1741 .release = idecd_release,
1742 .locked_ioctl = idecd_ioctl,
1743 .media_changed = idecd_media_changed,
1744 .revalidate_disk = idecd_revalidate_disk
1745 };
1746
1747 /* module options */
1748 static unsigned long debug_mask;
1749 module_param(debug_mask, ulong, 0644);
1750
1751 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1752
1753 static int ide_cd_probe(ide_drive_t *drive)
1754 {
1755 struct cdrom_info *info;
1756 struct gendisk *g;
1757 struct request_sense sense;
1758
1759 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1760 drive->driver_req, drive->media);
1761
1762 if (!strstr("ide-cdrom", drive->driver_req))
1763 goto failed;
1764
1765 if (drive->media != ide_cdrom && drive->media != ide_optical)
1766 goto failed;
1767
1768 drive->debug_mask = debug_mask;
1769 drive->irq_handler = cdrom_newpc_intr;
1770
1771 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1772 if (info == NULL) {
1773 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1774 drive->name);
1775 goto failed;
1776 }
1777
1778 g = alloc_disk(1 << PARTN_BITS);
1779 if (!g)
1780 goto out_free_cd;
1781
1782 ide_init_disk(g, drive);
1783
1784 info->dev.parent = &drive->gendev;
1785 info->dev.release = ide_cd_release;
1786 dev_set_name(&info->dev, dev_name(&drive->gendev));
1787
1788 if (device_register(&info->dev))
1789 goto out_free_disk;
1790
1791 info->drive = drive;
1792 info->driver = &ide_cdrom_driver;
1793 info->disk = g;
1794
1795 g->private_data = &info->driver;
1796
1797 drive->driver_data = info;
1798
1799 g->minors = 1;
1800 g->driverfs_dev = &drive->gendev;
1801 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1802 if (ide_cdrom_setup(drive)) {
1803 put_device(&info->dev);
1804 goto failed;
1805 }
1806
1807 ide_cd_read_toc(drive, &sense);
1808 g->fops = &idecd_ops;
1809 g->flags |= GENHD_FL_REMOVABLE;
1810 add_disk(g);
1811 return 0;
1812
1813 out_free_disk:
1814 put_disk(g);
1815 out_free_cd:
1816 kfree(info);
1817 failed:
1818 return -ENODEV;
1819 }
1820
1821 static void __exit ide_cdrom_exit(void)
1822 {
1823 driver_unregister(&ide_cdrom_driver.gen_driver);
1824 }
1825
1826 static int __init ide_cdrom_init(void)
1827 {
1828 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1829 return driver_register(&ide_cdrom_driver.gen_driver);
1830 }
1831
1832 MODULE_ALIAS("ide:*m-cdrom*");
1833 MODULE_ALIAS("ide-cd");
1834 module_init(ide_cdrom_init);
1835 module_exit(ide_cdrom_exit);
1836 MODULE_LICENSE("GPL");
kernel-based virtual machine