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