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ide-cd: minor ide_cdrom_setup() cleanup
[linux-2.6/kvm.git] / drivers / ide / ide-cd.c
blob5319e7a73708c19af9e312f380a84b3b05c200e9
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 cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
210 struct request *failed_command)
211 {
212 struct cdrom_info *info = drive->driver_data;
213 struct request *rq = &drive->request_sense_rq;
214
215 ide_debug_log(IDE_DBG_SENSE, "enter");
216
217 if (sense == NULL)
218 sense = &info->sense_data;
219
220 /* stuff the sense request in front of our current request */
221 blk_rq_init(NULL, rq);
222 rq->cmd_type = REQ_TYPE_ATA_PC;
223 rq->rq_disk = info->disk;
224
225 rq->data = sense;
226 rq->cmd[0] = GPCMD_REQUEST_SENSE;
227 rq->cmd[4] = 18;
228 rq->data_len = 18;
229
230 rq->cmd_type = REQ_TYPE_SENSE;
231 rq->cmd_flags |= REQ_PREEMPT;
232
233 /* NOTE! Save the failed command in "rq->buffer" */
234 rq->buffer = (void *) failed_command;
235
236 if (failed_command)
237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
238 failed_command->cmd[0]);
239
240 drive->hwif->rq = NULL;
241
242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
243 }
244
245 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
246 {
247 /*
248 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
249 * failed request
250 */
251 struct request *failed = (struct request *)rq->buffer;
252 struct cdrom_info *info = drive->driver_data;
253 void *sense = &info->sense_data;
254
255 if (failed) {
256 if (failed->sense) {
257 sense = failed->sense;
258 failed->sense_len = rq->sense_len;
259 }
260 cdrom_analyze_sense_data(drive, failed, sense);
261
262 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
263 BUG();
264 } else
265 cdrom_analyze_sense_data(drive, NULL, sense);
266 }
267
268 /*
269 * Returns:
270 * 0: if the request should be continued.
271 * 1: if the request will be going through error recovery.
272 * 2: if the request should be ended.
273 */
274 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
275 {
276 ide_hwif_t *hwif = drive->hwif;
277 struct request *rq = hwif->rq;
278 int stat, err, sense_key;
279
280 /* check for errors */
281 stat = hwif->tp_ops->read_status(hwif);
282
283 if (stat_ret)
284 *stat_ret = stat;
285
286 if (OK_STAT(stat, good_stat, BAD_R_STAT))
287 return 0;
288
289 /* get the IDE error register */
290 err = ide_read_error(drive);
291 sense_key = err >> 4;
292
293 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
294 "rq->cmd_type: 0x%x, err: 0x%x",
295 stat, good_stat, rq->cmd[0], rq->cmd_type,
296 err);
297
298 if (blk_sense_request(rq)) {
299 /*
300 * We got an error trying to get sense info from the drive
301 * (probably while trying to recover from a former error).
302 * Just give up.
303 */
304 rq->cmd_flags |= REQ_FAILED;
305 return 2;
306 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
307 /* All other functions, except for READ. */
308
309 /*
310 * if we have an error, pass back CHECK_CONDITION as the
311 * scsi status byte
312 */
313 if (blk_pc_request(rq) && !rq->errors)
314 rq->errors = SAM_STAT_CHECK_CONDITION;
315
316 /* check for tray open */
317 if (sense_key == NOT_READY) {
318 cdrom_saw_media_change(drive);
319 } else if (sense_key == UNIT_ATTENTION) {
320 /* check for media change */
321 cdrom_saw_media_change(drive);
322 return 0;
323 } else if (sense_key == ILLEGAL_REQUEST &&
324 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
325 /*
326 * Don't print error message for this condition--
327 * SFF8090i indicates that 5/24/00 is the correct
328 * response to a request to close the tray if the
329 * drive doesn't have that capability.
330 * cdrom_log_sense() knows this!
331 */
332 } else if (!(rq->cmd_flags & REQ_QUIET)) {
333 /* otherwise, print an error */
334 ide_dump_status(drive, "packet command error", stat);
335 }
336
337 rq->cmd_flags |= REQ_FAILED;
338
339 /*
340 * instead of playing games with moving completions around,
341 * remove failed request completely and end it when the
342 * request sense has completed
343 */
344 goto end_request;
345
346 } else if (blk_fs_request(rq)) {
347 int do_end_request = 0;
348
349 /* handle errors from READ and WRITE requests */
350
351 if (blk_noretry_request(rq))
352 do_end_request = 1;
353
354 if (sense_key == NOT_READY) {
355 /* tray open */
356 if (rq_data_dir(rq) == READ) {
357 cdrom_saw_media_change(drive);
358
359 /* fail the request */
360 printk(KERN_ERR PFX "%s: tray open\n",
361 drive->name);
362 do_end_request = 1;
363 } else {
364 struct cdrom_info *info = drive->driver_data;
365
366 /*
367 * Allow the drive 5 seconds to recover, some
368 * devices will return this error while flushing
369 * data from cache.
370 */
371 if (!rq->errors)
372 info->write_timeout = jiffies +
373 ATAPI_WAIT_WRITE_BUSY;
374 rq->errors = 1;
375 if (time_after(jiffies, info->write_timeout))
376 do_end_request = 1;
377 else {
378 struct request_queue *q = drive->queue;
379 unsigned long flags;
380
381 /*
382 * take a breather relying on the unplug
383 * timer to kick us again
384 */
385 spin_lock_irqsave(q->queue_lock, flags);
386 blk_plug_device(q);
387 spin_unlock_irqrestore(q->queue_lock, flags);
388
389 return 1;
390 }
391 }
392 } else if (sense_key == UNIT_ATTENTION) {
393 /* media change */
394 cdrom_saw_media_change(drive);
395
396 /*
397 * Arrange to retry the request but be sure to give up
398 * if we've retried too many times.
399 */
400 if (++rq->errors > ERROR_MAX)
401 do_end_request = 1;
402 } else if (sense_key == ILLEGAL_REQUEST ||
403 sense_key == DATA_PROTECT) {
404 /*
405 * No point in retrying after an illegal request or data
406 * protect error.
407 */
408 ide_dump_status(drive, "command error", stat);
409 do_end_request = 1;
410 } else if (sense_key == MEDIUM_ERROR) {
411 /*
412 * No point in re-trying a zillion times on a bad
413 * sector. If we got here the error is not correctable.
414 */
415 ide_dump_status(drive, "media error (bad sector)",
416 stat);
417 do_end_request = 1;
418 } else if (sense_key == BLANK_CHECK) {
419 /* disk appears blank ?? */
420 ide_dump_status(drive, "media error (blank)", stat);
421 do_end_request = 1;
422 } else if ((err & ~ATA_ABORTED) != 0) {
423 /* go to the default handler for other errors */
424 ide_error(drive, "cdrom_decode_status", stat);
425 return 1;
426 } else if ((++rq->errors > ERROR_MAX)) {
427 /* we've racked up too many retries, abort */
428 do_end_request = 1;
429 }
430
431 /*
432 * End a request through request sense analysis when we have
433 * sense data. We need this in order to perform end of media
434 * processing.
435 */
436 if (do_end_request)
437 goto end_request;
438
439 /*
440 * If we got a CHECK_CONDITION status, queue
441 * a request sense command.
442 */
443 if (stat & ATA_ERR)
444 cdrom_queue_request_sense(drive, NULL, NULL);
445 return 1;
446 } else {
447 blk_dump_rq_flags(rq, PFX "bad rq");
448 return 2;
449 }
450
451 end_request:
452 if (stat & ATA_ERR) {
453 struct request_queue *q = drive->queue;
454 unsigned long flags;
455
456 spin_lock_irqsave(q->queue_lock, flags);
457 blkdev_dequeue_request(rq);
458 spin_unlock_irqrestore(q->queue_lock, flags);
459
460 hwif->rq = NULL;
461
462 cdrom_queue_request_sense(drive, rq->sense, rq);
463 return 1;
464 } else
465 return 2;
466 }
467
468 /*
469 * Check the contents of the interrupt reason register from the cdrom
470 * and attempt to recover if there are problems. Returns 0 if everything's
471 * ok; nonzero if the request has been terminated.
472 */
473 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
474 int len, int ireason, int rw)
475 {
476 ide_hwif_t *hwif = drive->hwif;
477
478 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
479
480 /*
481 * ireason == 0: the drive wants to receive data from us
482 * ireason == 2: the drive is expecting to transfer data to us
483 */
484 if (ireason == (!rw << 1))
485 return 0;
486 else if (ireason == (rw << 1)) {
487
488 /* whoops... */
489 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
490 drive->name, __func__);
491
492 ide_pad_transfer(drive, rw, len);
493 } else if (rw == 0 && ireason == 1) {
494 /*
495 * Some drives (ASUS) seem to tell us that status info is
496 * available. Just get it and ignore.
497 */
498 (void)hwif->tp_ops->read_status(hwif);
499 return 0;
500 } else {
501 /* drive wants a command packet, or invalid ireason... */
502 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
503 drive->name, __func__, ireason);
504 }
505
506 if (rq->cmd_type == REQ_TYPE_ATA_PC)
507 rq->cmd_flags |= REQ_FAILED;
508
509 return -1;
510 }
511
512 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
513 {
514 struct request *rq = cmd->rq;
515
516 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
517
518 /*
519 * Some of the trailing request sense fields are optional,
520 * and some drives don't send them. Sigh.
521 */
522 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
523 cmd->nleft > 0 && cmd->nleft <= 5) {
524 unsigned int ofs = cmd->nbytes - cmd->nleft;
525
526 while (cmd->nleft > 0) {
527 *((u8 *)rq->data + ofs++) = 0;
528 cmd->nleft--;
529 }
530 }
531 }
532
533 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
534 int write, void *buffer, unsigned *bufflen,
535 struct request_sense *sense, int timeout,
536 unsigned int cmd_flags)
537 {
538 struct cdrom_info *info = drive->driver_data;
539 struct request_sense local_sense;
540 int retries = 10;
541 unsigned int flags = 0;
542
543 if (!sense)
544 sense = &local_sense;
545
546 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
547 "cmd_flags: 0x%x",
548 cmd[0], write, timeout, cmd_flags);
549
550 /* start of retry loop */
551 do {
552 struct request *rq;
553 int error;
554
555 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
556
557 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
558 rq->cmd_type = REQ_TYPE_ATA_PC;
559 rq->sense = sense;
560 rq->cmd_flags |= cmd_flags;
561 rq->timeout = timeout;
562 if (buffer) {
563 rq->data = buffer;
564 rq->data_len = *bufflen;
565 }
566
567 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
568
569 if (buffer)
570 *bufflen = rq->data_len;
571
572 flags = rq->cmd_flags;
573 blk_put_request(rq);
574
575 /*
576 * FIXME: we should probably abort/retry or something in case of
577 * failure.
578 */
579 if (flags & REQ_FAILED) {
580 /*
581 * The request failed. Retry if it was due to a unit
582 * attention status (usually means media was changed).
583 */
584 struct request_sense *reqbuf = sense;
585
586 if (reqbuf->sense_key == UNIT_ATTENTION)
587 cdrom_saw_media_change(drive);
588 else if (reqbuf->sense_key == NOT_READY &&
589 reqbuf->asc == 4 && reqbuf->ascq != 4) {
590 /*
591 * The drive is in the process of loading
592 * a disk. Retry, but wait a little to give
593 * the drive time to complete the load.
594 */
595 ssleep(2);
596 } else {
597 /* otherwise, don't retry */
598 retries = 0;
599 }
600 --retries;
601 }
602
603 /* end of retry loop */
604 } while ((flags & REQ_FAILED) && retries >= 0);
605
606 /* return an error if the command failed */
607 return (flags & REQ_FAILED) ? -EIO : 0;
608 }
609
610 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
611 {
612 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
613
614 if (cmd->tf_flags & IDE_TFLAG_WRITE)
615 nr_bytes -= cmd->last_xfer_len;
616
617 if (nr_bytes > 0)
618 ide_complete_rq(drive, 0, nr_bytes);
619 }
620
621 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
622 {
623 ide_hwif_t *hwif = drive->hwif;
624 struct ide_cmd *cmd = &hwif->cmd;
625 struct request *rq = hwif->rq;
626 ide_expiry_t *expiry = NULL;
627 int dma_error = 0, dma, stat, thislen, uptodate = 0;
628 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
629 int sense = blk_sense_request(rq);
630 unsigned int timeout;
631 u16 len;
632 u8 ireason;
633
634 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
635 rq->cmd[0], write);
636
637 /* check for errors */
638 dma = drive->dma;
639 if (dma) {
640 drive->dma = 0;
641 dma_error = hwif->dma_ops->dma_end(drive);
642 if (dma_error) {
643 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
644 write ? "write" : "read");
645 ide_dma_off(drive);
646 }
647 }
648
649 rc = cdrom_decode_status(drive, 0, &stat);
650 if (rc) {
651 if (rc == 2)
652 goto out_end;
653 return ide_stopped;
654 }
655
656 /* using dma, transfer is complete now */
657 if (dma) {
658 if (dma_error)
659 return ide_error(drive, "dma error", stat);
660 uptodate = 1;
661 goto out_end;
662 }
663
664 ide_read_bcount_and_ireason(drive, &len, &ireason);
665
666 thislen = blk_fs_request(rq) ? len : cmd->nleft;
667 if (thislen > len)
668 thislen = len;
669
670 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
671 stat, thislen);
672
673 /* If DRQ is clear, the command has completed. */
674 if ((stat & ATA_DRQ) == 0) {
675 if (blk_fs_request(rq)) {
676 /*
677 * If we're not done reading/writing, complain.
678 * Otherwise, complete the command normally.
679 */
680 uptodate = 1;
681 if (cmd->nleft > 0) {
682 printk(KERN_ERR PFX "%s: %s: data underrun "
683 "(%u bytes)\n", drive->name, __func__,
684 cmd->nleft);
685 if (!write)
686 rq->cmd_flags |= REQ_FAILED;
687 uptodate = 0;
688 }
689 } else if (!blk_pc_request(rq)) {
690 ide_cd_request_sense_fixup(drive, cmd);
691 /* complain if we still have data left to transfer */
692 uptodate = cmd->nleft ? 0 : 1;
693 if (uptodate == 0)
694 rq->cmd_flags |= REQ_FAILED;
695 }
696 goto out_end;
697 }
698
699 /* check which way to transfer data */
700 rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
701 if (rc)
702 goto out_end;
703
704 cmd->last_xfer_len = 0;
705
706 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
707 "ireason: 0x%x",
708 rq->cmd_type, ireason);
709
710 /* transfer data */
711 while (thislen > 0) {
712 int blen = min_t(int, thislen, cmd->nleft);
713
714 if (cmd->nleft == 0)
715 break;
716
717 ide_pio_bytes(drive, cmd, write, blen);
718 cmd->last_xfer_len += blen;
719
720 thislen -= blen;
721 len -= blen;
722
723 if (sense && write == 0)
724 rq->sense_len += blen;
725 }
726
727 /* pad, if necessary */
728 if (len > 0) {
729 if (blk_fs_request(rq) == 0 || write == 0)
730 ide_pad_transfer(drive, write, len);
731 else {
732 printk(KERN_ERR PFX "%s: confused, missing data\n",
733 drive->name);
734 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
735 }
736 }
737
738 if (blk_pc_request(rq)) {
739 timeout = rq->timeout;
740 } else {
741 timeout = ATAPI_WAIT_PC;
742 if (!blk_fs_request(rq))
743 expiry = ide_cd_expiry;
744 }
745
746 hwif->expiry = expiry;
747 ide_set_handler(drive, cdrom_newpc_intr, timeout);
748 return ide_started;
749
750 out_end:
751 if (blk_pc_request(rq) && rc == 0) {
752 unsigned int dlen = rq->data_len;
753
754 rq->data_len = 0;
755
756 if (blk_end_request(rq, 0, dlen))
757 BUG();
758
759 hwif->rq = NULL;
760 } else {
761 if (sense && uptodate)
762 ide_cd_complete_failed_rq(drive, rq);
763
764 if (blk_fs_request(rq)) {
765 if (cmd->nleft == 0)
766 uptodate = 1;
767 } else {
768 if (uptodate <= 0 && rq->errors == 0)
769 rq->errors = -EIO;
770 }
771
772 if (uptodate == 0)
773 ide_cd_error_cmd(drive, cmd);
774
775 /* make sure it's fully ended */
776 if (blk_pc_request(rq))
777 nsectors = (rq->data_len + 511) >> 9;
778 else
779 nsectors = rq->hard_nr_sectors;
780
781 if (nsectors == 0)
782 nsectors = 1;
783
784 if (blk_fs_request(rq) == 0) {
785 rq->data_len -= (cmd->nbytes - cmd->nleft);
786 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
787 rq->data_len += cmd->last_xfer_len;
788 }
789
790 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
791
792 if (sense && rc == 2)
793 ide_error(drive, "request sense failure", stat);
794 }
795 return ide_stopped;
796 }
797
798 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
799 {
800 struct cdrom_info *cd = drive->driver_data;
801 struct request_queue *q = drive->queue;
802 int write = rq_data_dir(rq) == WRITE;
803 unsigned short sectors_per_frame =
804 queue_hardsect_size(q) >> SECTOR_BITS;
805
806 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
807 "secs_per_frame: %u",
808 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
809
810 if (write) {
811 /* disk has become write protected */
812 if (get_disk_ro(cd->disk))
813 return ide_stopped;
814 } else {
815 /*
816 * We may be retrying this request after an error. Fix up any
817 * weirdness which might be present in the request packet.
818 */
819 q->prep_rq_fn(q, rq);
820 }
821
822 /* fs requests *must* be hardware frame aligned */
823 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
824 (rq->sector & (sectors_per_frame - 1)))
825 return ide_stopped;
826
827 /* use DMA, if possible */
828 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
829
830 if (write)
831 cd->devinfo.media_written = 1;
832
833 rq->timeout = ATAPI_WAIT_PC;
834
835 return ide_started;
836 }
837
838 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
839 {
840
841 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
842 rq->cmd[0], rq->cmd_type);
843
844 if (blk_pc_request(rq))
845 rq->cmd_flags |= REQ_QUIET;
846 else
847 rq->cmd_flags &= ~REQ_FAILED;
848
849 drive->dma = 0;
850
851 /* sg request */
852 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
853 struct request_queue *q = drive->queue;
854 unsigned int alignment;
855 char *buf;
856
857 if (rq->bio)
858 buf = bio_data(rq->bio);
859 else
860 buf = rq->data;
861
862 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
863
864 /*
865 * check if dma is safe
866 *
867 * NOTE! The "len" and "addr" checks should possibly have
868 * separate masks.
869 */
870 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
871 if ((unsigned long)buf & alignment
872 || rq->data_len & q->dma_pad_mask
873 || object_is_on_stack(buf))
874 drive->dma = 0;
875 }
876 }
877
878 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
879 sector_t block)
880 {
881 struct ide_cmd cmd;
882 int uptodate = 0, nsectors;
883
884 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
885 rq->cmd[0], (unsigned long long)block);
886
887 if (drive->debug_mask & IDE_DBG_RQ)
888 blk_dump_rq_flags(rq, "ide_cd_do_request");
889
890 if (blk_fs_request(rq)) {
891 if (cdrom_start_rw(drive, rq) == ide_stopped)
892 goto out_end;
893 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
894 rq->cmd_type == REQ_TYPE_ATA_PC) {
895 if (!rq->timeout)
896 rq->timeout = ATAPI_WAIT_PC;
897
898 cdrom_do_block_pc(drive, rq);
899 } else if (blk_special_request(rq)) {
900 /* right now this can only be a reset... */
901 uptodate = 1;
902 goto out_end;
903 } else {
904 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
905 if (rq->errors == 0)
906 rq->errors = -EIO;
907 goto out_end;
908 }
909
910 memset(&cmd, 0, sizeof(cmd));
911
912 if (rq_data_dir(rq))
913 cmd.tf_flags |= IDE_TFLAG_WRITE;
914
915 cmd.rq = rq;
916
917 if (blk_fs_request(rq) || rq->data_len) {
918 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
919 : rq->data_len);
920 ide_map_sg(drive, &cmd);
921 }
922
923 return ide_issue_pc(drive, &cmd);
924 out_end:
925 nsectors = rq->hard_nr_sectors;
926
927 if (nsectors == 0)
928 nsectors = 1;
929
930 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
931
932 return ide_stopped;
933 }
934
935 /*
936 * Ioctl handling.
937 *
938 * Routines which queue packet commands take as a final argument a pointer to a
939 * request_sense struct. If execution of the command results in an error with a
940 * CHECK CONDITION status, this structure will be filled with the results of the
941 * subsequent request sense command. The pointer can also be NULL, in which case
942 * no sense information is returned.
943 */
944 static void msf_from_bcd(struct atapi_msf *msf)
945 {
946 msf->minute = bcd2bin(msf->minute);
947 msf->second = bcd2bin(msf->second);
948 msf->frame = bcd2bin(msf->frame);
949 }
950
951 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
952 {
953 struct cdrom_info *info = drive->driver_data;
954 struct cdrom_device_info *cdi = &info->devinfo;
955 unsigned char cmd[BLK_MAX_CDB];
956
957 ide_debug_log(IDE_DBG_FUNC, "enter");
958
959 memset(cmd, 0, BLK_MAX_CDB);
960 cmd[0] = GPCMD_TEST_UNIT_READY;
961
962 /*
963 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
964 * instead of supporting the LOAD_UNLOAD opcode.
965 */
966 cmd[7] = cdi->sanyo_slot % 3;
967
968 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
969 }
970
971 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
972 unsigned long *sectors_per_frame,
973 struct request_sense *sense)
974 {
975 struct {
976 __be32 lba;
977 __be32 blocklen;
978 } capbuf;
979
980 int stat;
981 unsigned char cmd[BLK_MAX_CDB];
982 unsigned len = sizeof(capbuf);
983 u32 blocklen;
984
985 ide_debug_log(IDE_DBG_FUNC, "enter");
986
987 memset(cmd, 0, BLK_MAX_CDB);
988 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
989
990 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
991 REQ_QUIET);
992 if (stat)
993 return stat;
994
995 /*
996 * Sanity check the given block size
997 */
998 blocklen = be32_to_cpu(capbuf.blocklen);
999 switch (blocklen) {
1000 case 512:
1001 case 1024:
1002 case 2048:
1003 case 4096:
1004 break;
1005 default:
1006 printk(KERN_ERR PFX "%s: weird block size %u\n",
1007 drive->name, blocklen);
1008 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1009 drive->name);
1010 blocklen = 2048;
1011 break;
1012 }
1013
1014 *capacity = 1 + be32_to_cpu(capbuf.lba);
1015 *sectors_per_frame = blocklen >> SECTOR_BITS;
1016
1017 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1018 *capacity, *sectors_per_frame);
1019
1020 return 0;
1021 }
1022
1023 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1024 int format, char *buf, int buflen,
1025 struct request_sense *sense)
1026 {
1027 unsigned char cmd[BLK_MAX_CDB];
1028
1029 ide_debug_log(IDE_DBG_FUNC, "enter");
1030
1031 memset(cmd, 0, BLK_MAX_CDB);
1032
1033 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1034 cmd[6] = trackno;
1035 cmd[7] = (buflen >> 8);
1036 cmd[8] = (buflen & 0xff);
1037 cmd[9] = (format << 6);
1038
1039 if (msf_flag)
1040 cmd[1] = 2;
1041
1042 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1043 }
1044
1045 /* Try to read the entire TOC for the disk into our internal buffer. */
1046 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1047 {
1048 int stat, ntracks, i;
1049 struct cdrom_info *info = drive->driver_data;
1050 struct cdrom_device_info *cdi = &info->devinfo;
1051 struct atapi_toc *toc = info->toc;
1052 struct {
1053 struct atapi_toc_header hdr;
1054 struct atapi_toc_entry ent;
1055 } ms_tmp;
1056 long last_written;
1057 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1058
1059 ide_debug_log(IDE_DBG_FUNC, "enter");
1060
1061 if (toc == NULL) {
1062 /* try to allocate space */
1063 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1064 if (toc == NULL) {
1065 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1066 drive->name);
1067 return -ENOMEM;
1068 }
1069 info->toc = toc;
1070 }
1071
1072 /*
1073 * Check to see if the existing data is still valid. If it is,
1074 * just return.
1075 */
1076 (void) cdrom_check_status(drive, sense);
1077
1078 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1079 return 0;
1080
1081 /* try to get the total cdrom capacity and sector size */
1082 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1083 sense);
1084 if (stat)
1085 toc->capacity = 0x1fffff;
1086
1087 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1088 /* save a private copy of the TOC capacity for error handling */
1089 drive->probed_capacity = toc->capacity * sectors_per_frame;
1090
1091 blk_queue_hardsect_size(drive->queue,
1092 sectors_per_frame << SECTOR_BITS);
1093
1094 /* first read just the header, so we know how long the TOC is */
1095 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1096 sizeof(struct atapi_toc_header), sense);
1097 if (stat)
1098 return stat;
1099
1100 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1101 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1102 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1103 }
1104
1105 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1106 if (ntracks <= 0)
1107 return -EIO;
1108 if (ntracks > MAX_TRACKS)
1109 ntracks = MAX_TRACKS;
1110
1111 /* now read the whole schmeer */
1112 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1113 (char *)&toc->hdr,
1114 sizeof(struct atapi_toc_header) +
1115 (ntracks + 1) *
1116 sizeof(struct atapi_toc_entry), sense);
1117
1118 if (stat && toc->hdr.first_track > 1) {
1119 /*
1120 * Cds with CDI tracks only don't have any TOC entries, despite
1121 * of this the returned values are
1122 * first_track == last_track = number of CDI tracks + 1,
1123 * so that this case is indistinguishable from the same layout
1124 * plus an additional audio track. If we get an error for the
1125 * regular case, we assume a CDI without additional audio
1126 * tracks. In this case the readable TOC is empty (CDI tracks
1127 * are not included) and only holds the Leadout entry.
1128 *
1129 * Heiko Eißfeldt.
1130 */
1131 ntracks = 0;
1132 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1133 (char *)&toc->hdr,
1134 sizeof(struct atapi_toc_header) +
1135 (ntracks + 1) *
1136 sizeof(struct atapi_toc_entry),
1137 sense);
1138 if (stat)
1139 return stat;
1140
1141 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1142 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1143 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1144 } else {
1145 toc->hdr.first_track = CDROM_LEADOUT;
1146 toc->hdr.last_track = CDROM_LEADOUT;
1147 }
1148 }
1149
1150 if (stat)
1151 return stat;
1152
1153 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1154
1155 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1156 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1157 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1158 }
1159
1160 for (i = 0; i <= ntracks; i++) {
1161 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1162 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1163 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1164 msf_from_bcd(&toc->ent[i].addr.msf);
1165 }
1166 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1167 toc->ent[i].addr.msf.second,
1168 toc->ent[i].addr.msf.frame);
1169 }
1170
1171 if (toc->hdr.first_track != CDROM_LEADOUT) {
1172 /* read the multisession information */
1173 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1174 sizeof(ms_tmp), sense);
1175 if (stat)
1176 return stat;
1177
1178 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1179 } else {
1180 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1181 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1182 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1183 }
1184
1185 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1186 /* re-read multisession information using MSF format */
1187 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1188 sizeof(ms_tmp), sense);
1189 if (stat)
1190 return stat;
1191
1192 msf_from_bcd(&ms_tmp.ent.addr.msf);
1193 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1194 ms_tmp.ent.addr.msf.second,
1195 ms_tmp.ent.addr.msf.frame);
1196 }
1197
1198 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1199
1200 /* now try to get the total cdrom capacity */
1201 stat = cdrom_get_last_written(cdi, &last_written);
1202 if (!stat && (last_written > toc->capacity)) {
1203 toc->capacity = last_written;
1204 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1205 drive->probed_capacity = toc->capacity * sectors_per_frame;
1206 }
1207
1208 /* Remember that we've read this stuff. */
1209 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1210
1211 return 0;
1212 }
1213
1214 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1215 {
1216 struct cdrom_info *info = drive->driver_data;
1217 struct cdrom_device_info *cdi = &info->devinfo;
1218 struct packet_command cgc;
1219 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1220
1221 ide_debug_log(IDE_DBG_FUNC, "enter");
1222
1223 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1224 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1225
1226 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1227 do {
1228 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1229 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1230 if (!stat)
1231 break;
1232 } while (--attempts);
1233 return stat;
1234 }
1235
1236 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1237 {
1238 struct cdrom_info *cd = drive->driver_data;
1239 u16 curspeed, maxspeed;
1240
1241 ide_debug_log(IDE_DBG_FUNC, "enter");
1242
1243 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1244 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1245 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1246 } else {
1247 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1248 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1249 }
1250
1251 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1252 curspeed, maxspeed);
1253
1254 cd->current_speed = (curspeed + (176/2)) / 176;
1255 cd->max_speed = (maxspeed + (176/2)) / 176;
1256 }
1257
1258 #define IDE_CD_CAPABILITIES \
1259 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1260 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1261 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1262 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1263 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1264
1265 static struct cdrom_device_ops ide_cdrom_dops = {
1266 .open = ide_cdrom_open_real,
1267 .release = ide_cdrom_release_real,
1268 .drive_status = ide_cdrom_drive_status,
1269 .media_changed = ide_cdrom_check_media_change_real,
1270 .tray_move = ide_cdrom_tray_move,
1271 .lock_door = ide_cdrom_lock_door,
1272 .select_speed = ide_cdrom_select_speed,
1273 .get_last_session = ide_cdrom_get_last_session,
1274 .get_mcn = ide_cdrom_get_mcn,
1275 .reset = ide_cdrom_reset,
1276 .audio_ioctl = ide_cdrom_audio_ioctl,
1277 .capability = IDE_CD_CAPABILITIES,
1278 .generic_packet = ide_cdrom_packet,
1279 };
1280
1281 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1282 {
1283 struct cdrom_info *info = drive->driver_data;
1284 struct cdrom_device_info *devinfo = &info->devinfo;
1285
1286 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1287
1288 devinfo->ops = &ide_cdrom_dops;
1289 devinfo->speed = info->current_speed;
1290 devinfo->capacity = nslots;
1291 devinfo->handle = drive;
1292 strcpy(devinfo->name, drive->name);
1293
1294 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1295 devinfo->mask |= CDC_SELECT_SPEED;
1296
1297 devinfo->disk = info->disk;
1298 return register_cdrom(devinfo);
1299 }
1300
1301 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1302 {
1303 struct cdrom_info *cd = drive->driver_data;
1304 struct cdrom_device_info *cdi = &cd->devinfo;
1305 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1306 mechtype_t mechtype;
1307 int nslots = 1;
1308
1309 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1310 drive->media, drive->atapi_flags);
1311
1312 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1313 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1314 CDC_MO_DRIVE | CDC_RAM);
1315
1316 if (drive->media == ide_optical) {
1317 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1318 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1319 drive->name);
1320 return nslots;
1321 }
1322
1323 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1324 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1325 cdi->mask &= ~CDC_PLAY_AUDIO;
1326 return nslots;
1327 }
1328
1329 /*
1330 * We have to cheat a little here. the packet will eventually be queued
1331 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1332 * Since this device hasn't been registered with the Uniform layer yet,
1333 * it can't do this. Same goes for cdi->ops.
1334 */
1335 cdi->handle = drive;
1336 cdi->ops = &ide_cdrom_dops;
1337
1338 if (ide_cdrom_get_capabilities(drive, buf))
1339 return 0;
1340
1341 if ((buf[8 + 6] & 0x01) == 0)
1342 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1343 if (buf[8 + 6] & 0x08)
1344 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1345 if (buf[8 + 3] & 0x01)
1346 cdi->mask &= ~CDC_CD_R;
1347 if (buf[8 + 3] & 0x02)
1348 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1349 if (buf[8 + 2] & 0x38)
1350 cdi->mask &= ~CDC_DVD;
1351 if (buf[8 + 3] & 0x20)
1352 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1353 if (buf[8 + 3] & 0x10)
1354 cdi->mask &= ~CDC_DVD_R;
1355 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1356 cdi->mask &= ~CDC_PLAY_AUDIO;
1357
1358 mechtype = buf[8 + 6] >> 5;
1359 if (mechtype == mechtype_caddy ||
1360 mechtype == mechtype_popup ||
1361 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1362 cdi->mask |= CDC_CLOSE_TRAY;
1363
1364 if (cdi->sanyo_slot > 0) {
1365 cdi->mask &= ~CDC_SELECT_DISC;
1366 nslots = 3;
1367 } else if (mechtype == mechtype_individual_changer ||
1368 mechtype == mechtype_cartridge_changer) {
1369 nslots = cdrom_number_of_slots(cdi);
1370 if (nslots > 1)
1371 cdi->mask &= ~CDC_SELECT_DISC;
1372 }
1373
1374 ide_cdrom_update_speed(drive, buf);
1375
1376 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1377
1378 /* don't print speed if the drive reported 0 */
1379 if (cd->max_speed)
1380 printk(KERN_CONT " %dX", cd->max_speed);
1381
1382 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1383
1384 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1385 printk(KERN_CONT " DVD%s%s",
1386 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1387 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1388
1389 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1390 printk(KERN_CONT " CD%s%s",
1391 (cdi->mask & CDC_CD_R) ? "" : "-R",
1392 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1393
1394 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1395 printk(KERN_CONT " changer w/%d slots", nslots);
1396 else
1397 printk(KERN_CONT " drive");
1398
1399 printk(KERN_CONT ", %dkB Cache\n",
1400 be16_to_cpup((__be16 *)&buf[8 + 12]));
1401
1402 return nslots;
1403 }
1404
1405 /* standard prep_rq_fn that builds 10 byte cmds */
1406 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1407 {
1408 int hard_sect = queue_hardsect_size(q);
1409 long block = (long)rq->hard_sector / (hard_sect >> 9);
1410 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1411
1412 memset(rq->cmd, 0, BLK_MAX_CDB);
1413
1414 if (rq_data_dir(rq) == READ)
1415 rq->cmd[0] = GPCMD_READ_10;
1416 else
1417 rq->cmd[0] = GPCMD_WRITE_10;
1418
1419 /*
1420 * fill in lba
1421 */
1422 rq->cmd[2] = (block >> 24) & 0xff;
1423 rq->cmd[3] = (block >> 16) & 0xff;
1424 rq->cmd[4] = (block >> 8) & 0xff;
1425 rq->cmd[5] = block & 0xff;
1426
1427 /*
1428 * and transfer length
1429 */
1430 rq->cmd[7] = (blocks >> 8) & 0xff;
1431 rq->cmd[8] = blocks & 0xff;
1432 rq->cmd_len = 10;
1433 return BLKPREP_OK;
1434 }
1435
1436 /*
1437 * Most of the SCSI commands are supported directly by ATAPI devices.
1438 * This transform handles the few exceptions.
1439 */
1440 static int ide_cdrom_prep_pc(struct request *rq)
1441 {
1442 u8 *c = rq->cmd;
1443
1444 /* transform 6-byte read/write commands to the 10-byte version */
1445 if (c[0] == READ_6 || c[0] == WRITE_6) {
1446 c[8] = c[4];
1447 c[5] = c[3];
1448 c[4] = c[2];
1449 c[3] = c[1] & 0x1f;
1450 c[2] = 0;
1451 c[1] &= 0xe0;
1452 c[0] += (READ_10 - READ_6);
1453 rq->cmd_len = 10;
1454 return BLKPREP_OK;
1455 }
1456
1457 /*
1458 * it's silly to pretend we understand 6-byte sense commands, just
1459 * reject with ILLEGAL_REQUEST and the caller should take the
1460 * appropriate action
1461 */
1462 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1463 rq->errors = ILLEGAL_REQUEST;
1464 return BLKPREP_KILL;
1465 }
1466
1467 return BLKPREP_OK;
1468 }
1469
1470 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1471 {
1472 if (blk_fs_request(rq))
1473 return ide_cdrom_prep_fs(q, rq);
1474 else if (blk_pc_request(rq))
1475 return ide_cdrom_prep_pc(rq);
1476
1477 return 0;
1478 }
1479
1480 struct cd_list_entry {
1481 const char *id_model;
1482 const char *id_firmware;
1483 unsigned int cd_flags;
1484 };
1485
1486 #ifdef CONFIG_IDE_PROC_FS
1487 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1488 {
1489 unsigned long capacity, sectors_per_frame;
1490
1491 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1492 return 0;
1493
1494 return capacity * sectors_per_frame;
1495 }
1496
1497 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1498 int count, int *eof, void *data)
1499 {
1500 ide_drive_t *drive = data;
1501 int len;
1502
1503 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1504 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1505 }
1506
1507 static ide_proc_entry_t idecd_proc[] = {
1508 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1509 { NULL, 0, NULL, NULL }
1510 };
1511
1512 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1513 {
1514 return idecd_proc;
1515 }
1516
1517 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1518 {
1519 return NULL;
1520 }
1521 #endif
1522
1523 static const struct cd_list_entry ide_cd_quirks_list[] = {
1524 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1525 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1526 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1527 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1528 IDE_AFLAG_PRE_ATAPI12, },
1529 /* Vertos 300, some versions of this drive like to talk BCD. */
1530 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1531 /* Vertos 600 ESD. */
1532 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1533 /*
1534 * Sanyo 3 CD changer uses a non-standard command for CD changing
1535 * (by default standard ATAPI support for CD changers is used).
1536 */
1537 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1538 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1539 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1540 /* Stingray 8X CD-ROM. */
1541 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1542 /*
1543 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1544 * mode sense page capabilities size, but older drives break.
1545 */
1546 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1547 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1548 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1549 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1550 /*
1551 * Some drives used by Apple don't advertise audio play
1552 * but they do support reading TOC & audio datas.
1553 */
1554 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1555 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1556 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1557 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1558 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1559 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1560 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1561 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1562 { NULL, NULL, 0 }
1563 };
1564
1565 static unsigned int ide_cd_flags(u16 *id)
1566 {
1567 const struct cd_list_entry *cle = ide_cd_quirks_list;
1568
1569 while (cle->id_model) {
1570 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1571 (cle->id_firmware == NULL ||
1572 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1573 return cle->cd_flags;
1574 cle++;
1575 }
1576
1577 return 0;
1578 }
1579
1580 static int ide_cdrom_setup(ide_drive_t *drive)
1581 {
1582 struct cdrom_info *cd = drive->driver_data;
1583 struct cdrom_device_info *cdi = &cd->devinfo;
1584 struct request_queue *q = drive->queue;
1585 u16 *id = drive->id;
1586 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1587 int nslots;
1588
1589 ide_debug_log(IDE_DBG_PROBE, "enter");
1590
1591 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1592 blk_queue_dma_alignment(q, 31);
1593 blk_queue_update_dma_pad(q, 15);
1594
1595 q->unplug_delay = max((1 * HZ) / 1000, 1);
1596
1597 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1598 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1599
1600 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1601 fw_rev[4] == '1' && fw_rev[6] <= '2')
1602 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1603 IDE_AFLAG_TOCADDR_AS_BCD);
1604 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1605 fw_rev[4] == '1' && fw_rev[6] <= '2')
1606 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1607 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1608 /* 3 => use CD in slot 0 */
1609 cdi->sanyo_slot = 3;
1610
1611 nslots = ide_cdrom_probe_capabilities(drive);
1612
1613 blk_queue_hardsect_size(q, CD_FRAMESIZE);
1614
1615 if (ide_cdrom_register(drive, nslots)) {
1616 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1617 " cdrom driver.\n", drive->name, __func__);
1618 cd->devinfo.handle = NULL;
1619 return 1;
1620 }
1621
1622 ide_proc_register_driver(drive, cd->driver);
1623 return 0;
1624 }
1625
1626 static void ide_cd_remove(ide_drive_t *drive)
1627 {
1628 struct cdrom_info *info = drive->driver_data;
1629
1630 ide_debug_log(IDE_DBG_FUNC, "enter");
1631
1632 ide_proc_unregister_driver(drive, info->driver);
1633 device_del(&info->dev);
1634 del_gendisk(info->disk);
1635
1636 mutex_lock(&idecd_ref_mutex);
1637 put_device(&info->dev);
1638 mutex_unlock(&idecd_ref_mutex);
1639 }
1640
1641 static void ide_cd_release(struct device *dev)
1642 {
1643 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1644 struct cdrom_device_info *devinfo = &info->devinfo;
1645 ide_drive_t *drive = info->drive;
1646 struct gendisk *g = info->disk;
1647
1648 ide_debug_log(IDE_DBG_FUNC, "enter");
1649
1650 kfree(info->toc);
1651 if (devinfo->handle == drive)
1652 unregister_cdrom(devinfo);
1653 drive->driver_data = NULL;
1654 blk_queue_prep_rq(drive->queue, NULL);
1655 g->private_data = NULL;
1656 put_disk(g);
1657 kfree(info);
1658 }
1659
1660 static int ide_cd_probe(ide_drive_t *);
1661
1662 static struct ide_driver ide_cdrom_driver = {
1663 .gen_driver = {
1664 .owner = THIS_MODULE,
1665 .name = "ide-cdrom",
1666 .bus = &ide_bus_type,
1667 },
1668 .probe = ide_cd_probe,
1669 .remove = ide_cd_remove,
1670 .version = IDECD_VERSION,
1671 .do_request = ide_cd_do_request,
1672 #ifdef CONFIG_IDE_PROC_FS
1673 .proc_entries = ide_cd_proc_entries,
1674 .proc_devsets = ide_cd_proc_devsets,
1675 #endif
1676 };
1677
1678 static int idecd_open(struct block_device *bdev, fmode_t mode)
1679 {
1680 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1681 int rc = -ENOMEM;
1682
1683 if (!info)
1684 return -ENXIO;
1685
1686 rc = cdrom_open(&info->devinfo, bdev, mode);
1687
1688 if (rc < 0)
1689 ide_cd_put(info);
1690
1691 return rc;
1692 }
1693
1694 static int idecd_release(struct gendisk *disk, fmode_t mode)
1695 {
1696 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1697
1698 cdrom_release(&info->devinfo, mode);
1699
1700 ide_cd_put(info);
1701
1702 return 0;
1703 }
1704
1705 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1706 {
1707 struct packet_command cgc;
1708 char buffer[16];
1709 int stat;
1710 char spindown;
1711
1712 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1713 return -EFAULT;
1714
1715 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1716
1717 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1718 if (stat)
1719 return stat;
1720
1721 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1722 return cdrom_mode_select(cdi, &cgc);
1723 }
1724
1725 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1726 {
1727 struct packet_command cgc;
1728 char buffer[16];
1729 int stat;
1730 char spindown;
1731
1732 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1733
1734 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1735 if (stat)
1736 return stat;
1737
1738 spindown = buffer[11] & 0x0f;
1739 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1740 return -EFAULT;
1741 return 0;
1742 }
1743
1744 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1745 unsigned int cmd, unsigned long arg)
1746 {
1747 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1748 int err;
1749
1750 switch (cmd) {
1751 case CDROMSETSPINDOWN:
1752 return idecd_set_spindown(&info->devinfo, arg);
1753 case CDROMGETSPINDOWN:
1754 return idecd_get_spindown(&info->devinfo, arg);
1755 default:
1756 break;
1757 }
1758
1759 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1760 if (err == -EINVAL)
1761 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1762
1763 return err;
1764 }
1765
1766 static int idecd_media_changed(struct gendisk *disk)
1767 {
1768 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1769 return cdrom_media_changed(&info->devinfo);
1770 }
1771
1772 static int idecd_revalidate_disk(struct gendisk *disk)
1773 {
1774 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1775 struct request_sense sense;
1776
1777 ide_cd_read_toc(info->drive, &sense);
1778
1779 return 0;
1780 }
1781
1782 static struct block_device_operations idecd_ops = {
1783 .owner = THIS_MODULE,
1784 .open = idecd_open,
1785 .release = idecd_release,
1786 .locked_ioctl = idecd_ioctl,
1787 .media_changed = idecd_media_changed,
1788 .revalidate_disk = idecd_revalidate_disk
1789 };
1790
1791 /* module options */
1792 static unsigned long debug_mask;
1793 module_param(debug_mask, ulong, 0644);
1794
1795 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1796
1797 static int ide_cd_probe(ide_drive_t *drive)
1798 {
1799 struct cdrom_info *info;
1800 struct gendisk *g;
1801 struct request_sense sense;
1802
1803 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1804 drive->driver_req, drive->media);
1805
1806 if (!strstr("ide-cdrom", drive->driver_req))
1807 goto failed;
1808
1809 if (drive->media != ide_cdrom && drive->media != ide_optical)
1810 goto failed;
1811
1812 drive->debug_mask = debug_mask;
1813 drive->irq_handler = cdrom_newpc_intr;
1814
1815 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1816 if (info == NULL) {
1817 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1818 drive->name);
1819 goto failed;
1820 }
1821
1822 g = alloc_disk(1 << PARTN_BITS);
1823 if (!g)
1824 goto out_free_cd;
1825
1826 ide_init_disk(g, drive);
1827
1828 info->dev.parent = &drive->gendev;
1829 info->dev.release = ide_cd_release;
1830 dev_set_name(&info->dev, dev_name(&drive->gendev));
1831
1832 if (device_register(&info->dev))
1833 goto out_free_disk;
1834
1835 info->drive = drive;
1836 info->driver = &ide_cdrom_driver;
1837 info->disk = g;
1838
1839 g->private_data = &info->driver;
1840
1841 drive->driver_data = info;
1842
1843 g->minors = 1;
1844 g->driverfs_dev = &drive->gendev;
1845 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1846 if (ide_cdrom_setup(drive)) {
1847 put_device(&info->dev);
1848 goto failed;
1849 }
1850
1851 ide_cd_read_toc(drive, &sense);
1852 g->fops = &idecd_ops;
1853 g->flags |= GENHD_FL_REMOVABLE;
1854 add_disk(g);
1855 return 0;
1856
1857 out_free_disk:
1858 put_disk(g);
1859 out_free_cd:
1860 kfree(info);
1861 failed:
1862 return -ENODEV;
1863 }
1864
1865 static void __exit ide_cdrom_exit(void)
1866 {
1867 driver_unregister(&ide_cdrom_driver.gen_driver);
1868 }
1869
1870 static int __init ide_cdrom_init(void)
1871 {
1872 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1873 return driver_register(&ide_cdrom_driver.gen_driver);
1874 }
1875
1876 MODULE_ALIAS("ide:*m-cdrom*");
1877 MODULE_ALIAS("ide-cd");
1878 module_init(ide_cdrom_init);
1879 module_exit(ide_cdrom_exit);
1880 MODULE_LICENSE("GPL");
kernel-based virtual machine