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staging/irda/net: Drop extraneous parentheses around test
[linux-2.6/btrfs-unstable.git] / drivers / ide / ide-cd.c
blob7c3ed7c9af7723390dee76949ee03f1ecb76994c
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/sched/task_stack.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/seq_file.h>
35 #include <linux/slab.h>
36 #include <linux/interrupt.h>
37 #include <linux/errno.h>
38 #include <linux/cdrom.h>
39 #include <linux/ide.h>
40 #include <linux/completion.h>
41 #include <linux/mutex.h>
42 #include <linux/bcd.h>
43
44 /* For SCSI -> ATAPI command conversion */
45 #include <scsi/scsi.h>
46
47 #include <linux/io.h>
48 #include <asm/byteorder.h>
49 #include <linux/uaccess.h>
50 #include <asm/unaligned.h>
51
52 #include "ide-cd.h"
53
54 static DEFINE_MUTEX(ide_cd_mutex);
55 static DEFINE_MUTEX(idecd_ref_mutex);
56
57 static void ide_cd_release(struct device *);
58
59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
60 {
61 struct cdrom_info *cd = NULL;
62
63 mutex_lock(&idecd_ref_mutex);
64 cd = ide_drv_g(disk, cdrom_info);
65 if (cd) {
66 if (ide_device_get(cd->drive))
67 cd = NULL;
68 else
69 get_device(&cd->dev);
70
71 }
72 mutex_unlock(&idecd_ref_mutex);
73 return cd;
74 }
75
76 static void ide_cd_put(struct cdrom_info *cd)
77 {
78 ide_drive_t *drive = cd->drive;
79
80 mutex_lock(&idecd_ref_mutex);
81 put_device(&cd->dev);
82 ide_device_put(drive);
83 mutex_unlock(&idecd_ref_mutex);
84 }
85
86 /*
87 * Generic packet command support and error handling routines.
88 */
89
90 /* Mark that we've seen a media change and invalidate our internal buffers. */
91 static void cdrom_saw_media_change(ide_drive_t *drive)
92 {
93 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
94 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
95 }
96
97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
98 {
99 struct request_sense *sense = &drive->sense_data;
100 int log = 0;
101
102 if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
103 return 0;
104
105 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
106
107 switch (sense->sense_key) {
108 case NO_SENSE:
109 case RECOVERED_ERROR:
110 break;
111 case NOT_READY:
112 /*
113 * don't care about tray state messages for e.g. capacity
114 * commands or in-progress or becoming ready
115 */
116 if (sense->asc == 0x3a || sense->asc == 0x04)
117 break;
118 log = 1;
119 break;
120 case ILLEGAL_REQUEST:
121 /*
122 * don't log START_STOP unit with LoEj set, since we cannot
123 * reliably check if drive can auto-close
124 */
125 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126 break;
127 log = 1;
128 break;
129 case UNIT_ATTENTION:
130 /*
131 * Make good and sure we've seen this potential media change.
132 * Some drives (i.e. Creative) fail to present the correct sense
133 * key in the error register.
134 */
135 cdrom_saw_media_change(drive);
136 break;
137 default:
138 log = 1;
139 break;
140 }
141 return log;
142 }
143
144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
145 struct request *failed_command)
146 {
147 struct request_sense *sense = &drive->sense_data;
148 struct cdrom_info *info = drive->driver_data;
149 unsigned long sector;
150 unsigned long bio_sectors;
151
152 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
153 sense->error_code, sense->sense_key);
154
155 if (failed_command)
156 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
157 failed_command->cmd[0]);
158
159 if (!cdrom_log_sense(drive, failed_command))
160 return;
161
162 /*
163 * If a read toc is executed for a CD-R or CD-RW medium where the first
164 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
165 * confusing error)
166 */
167 if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168 if (sense->sense_key == 0x05 && sense->asc == 0x24)
169 return;
170
171 /* current error */
172 if (sense->error_code == 0x70) {
173 switch (sense->sense_key) {
174 case MEDIUM_ERROR:
175 case VOLUME_OVERFLOW:
176 case ILLEGAL_REQUEST:
177 if (!sense->valid)
178 break;
179 if (failed_command == NULL ||
180 blk_rq_is_passthrough(failed_command))
181 break;
182 sector = (sense->information[0] << 24) |
183 (sense->information[1] << 16) |
184 (sense->information[2] << 8) |
185 (sense->information[3]);
186
187 if (queue_logical_block_size(drive->queue) == 2048)
188 /* device sector size is 2K */
189 sector <<= 2;
190
191 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
192 sector &= ~(bio_sectors - 1);
193
194 /*
195 * The SCSI specification allows for the value
196 * returned by READ CAPACITY to be up to 75 2K
197 * sectors past the last readable block.
198 * Therefore, if we hit a medium error within the
199 * last 75 2K sectors, we decrease the saved size
200 * value.
201 */
202 if (sector < get_capacity(info->disk) &&
203 drive->probed_capacity - sector < 4 * 75)
204 set_capacity(info->disk, sector);
205 }
206 }
207
208 ide_cd_log_error(drive->name, failed_command, sense);
209 }
210
211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
212 {
213 /*
214 * For ATA_PRIV_SENSE, "rq->special" points to the original
215 * failed request. Also, the sense data should be read
216 * directly from rq which might be different from the original
217 * sense buffer if it got copied during mapping.
218 */
219 struct request *failed = (struct request *)rq->special;
220 void *sense = bio_data(rq->bio);
221
222 if (failed) {
223 /*
224 * Sense is always read into drive->sense_data, copy back to the
225 * original request.
226 */
227 memcpy(scsi_req(failed)->sense, sense, 18);
228 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
229 cdrom_analyze_sense_data(drive, failed);
230
231 if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
232 BUG();
233 } else
234 cdrom_analyze_sense_data(drive, NULL);
235 }
236
237
238 /*
239 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
240 * while flushing data from cache.
241 *
242 * returns: 0 failed (write timeout expired)
243 * 1 success
244 */
245 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
246 {
247
248 struct cdrom_info *info = drive->driver_data;
249
250 if (!scsi_req(rq)->result)
251 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
252
253 scsi_req(rq)->result = 1;
254
255 if (time_after(jiffies, info->write_timeout))
256 return 0;
257 else {
258 /*
259 * take a breather
260 */
261 blk_delay_queue(drive->queue, 1);
262 return 1;
263 }
264 }
265
266 /**
267 * Returns:
268 * 0: if the request should be continued.
269 * 1: if the request will be going through error recovery.
270 * 2: if the request should be ended.
271 */
272 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
273 {
274 ide_hwif_t *hwif = drive->hwif;
275 struct request *rq = hwif->rq;
276 int err, sense_key, do_end_request = 0;
277
278 /* get the IDE error register */
279 err = ide_read_error(drive);
280 sense_key = err >> 4;
281
282 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
283 "stat 0x%x",
284 rq->cmd[0], rq->cmd_type, err, stat);
285
286 if (ata_sense_request(rq)) {
287 /*
288 * We got an error trying to get sense info from the drive
289 * (probably while trying to recover from a former error).
290 * Just give up.
291 */
292 rq->rq_flags |= RQF_FAILED;
293 return 2;
294 }
295
296 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
297 if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
298 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
299
300 if (blk_noretry_request(rq))
301 do_end_request = 1;
302
303 switch (sense_key) {
304 case NOT_READY:
305 if (req_op(rq) == REQ_OP_WRITE) {
306 if (ide_cd_breathe(drive, rq))
307 return 1;
308 } else {
309 cdrom_saw_media_change(drive);
310
311 if (!blk_rq_is_passthrough(rq) &&
312 !(rq->rq_flags & RQF_QUIET))
313 printk(KERN_ERR PFX "%s: tray open\n",
314 drive->name);
315 }
316 do_end_request = 1;
317 break;
318 case UNIT_ATTENTION:
319 cdrom_saw_media_change(drive);
320
321 if (blk_rq_is_passthrough(rq))
322 return 0;
323
324 /*
325 * Arrange to retry the request but be sure to give up if we've
326 * retried too many times.
327 */
328 if (++scsi_req(rq)->result > ERROR_MAX)
329 do_end_request = 1;
330 break;
331 case ILLEGAL_REQUEST:
332 /*
333 * Don't print error message for this condition -- SFF8090i
334 * indicates that 5/24/00 is the correct response to a request
335 * to close the tray if the drive doesn't have that capability.
336 *
337 * cdrom_log_sense() knows this!
338 */
339 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
340 break;
341 /* fall-through */
342 case DATA_PROTECT:
343 /*
344 * No point in retrying after an illegal request or data
345 * protect error.
346 */
347 if (!(rq->rq_flags & RQF_QUIET))
348 ide_dump_status(drive, "command error", stat);
349 do_end_request = 1;
350 break;
351 case MEDIUM_ERROR:
352 /*
353 * No point in re-trying a zillion times on a bad sector.
354 * If we got here the error is not correctable.
355 */
356 if (!(rq->rq_flags & RQF_QUIET))
357 ide_dump_status(drive, "media error "
358 "(bad sector)", stat);
359 do_end_request = 1;
360 break;
361 case BLANK_CHECK:
362 /* disk appears blank? */
363 if (!(rq->rq_flags & RQF_QUIET))
364 ide_dump_status(drive, "media error (blank)",
365 stat);
366 do_end_request = 1;
367 break;
368 default:
369 if (blk_rq_is_passthrough(rq))
370 break;
371 if (err & ~ATA_ABORTED) {
372 /* go to the default handler for other errors */
373 ide_error(drive, "cdrom_decode_status", stat);
374 return 1;
375 } else if (++scsi_req(rq)->result > ERROR_MAX)
376 /* we've racked up too many retries, abort */
377 do_end_request = 1;
378 }
379
380 if (blk_rq_is_passthrough(rq)) {
381 rq->rq_flags |= RQF_FAILED;
382 do_end_request = 1;
383 }
384
385 /*
386 * End a request through request sense analysis when we have sense data.
387 * We need this in order to perform end of media processing.
388 */
389 if (do_end_request)
390 goto end_request;
391
392 /* if we got a CHECK_CONDITION status, queue a request sense command */
393 if (stat & ATA_ERR)
394 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
395 return 1;
396
397 end_request:
398 if (stat & ATA_ERR) {
399 hwif->rq = NULL;
400 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
401 } else
402 return 2;
403 }
404
405 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
406 {
407 struct request *rq = cmd->rq;
408
409 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
410
411 /*
412 * Some of the trailing request sense fields are optional,
413 * and some drives don't send them. Sigh.
414 */
415 if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
416 cmd->nleft > 0 && cmd->nleft <= 5)
417 cmd->nleft = 0;
418 }
419
420 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
421 int write, void *buffer, unsigned *bufflen,
422 struct request_sense *sense, int timeout,
423 req_flags_t rq_flags)
424 {
425 struct cdrom_info *info = drive->driver_data;
426 int retries = 10;
427 bool failed;
428
429 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
430 "rq_flags: 0x%x",
431 cmd[0], write, timeout, rq_flags);
432
433 /* start of retry loop */
434 do {
435 struct request *rq;
436 int error;
437 bool delay = false;
438
439 rq = blk_get_request(drive->queue,
440 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, __GFP_RECLAIM);
441 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
442 ide_req(rq)->type = ATA_PRIV_PC;
443 rq->rq_flags |= rq_flags;
444 rq->timeout = timeout;
445 if (buffer) {
446 error = blk_rq_map_kern(drive->queue, rq, buffer,
447 *bufflen, GFP_NOIO);
448 if (error) {
449 blk_put_request(rq);
450 return error;
451 }
452 }
453
454 blk_execute_rq(drive->queue, info->disk, rq, 0);
455 error = scsi_req(rq)->result ? -EIO : 0;
456
457 if (buffer)
458 *bufflen = scsi_req(rq)->resid_len;
459 if (sense)
460 memcpy(sense, scsi_req(rq)->sense, sizeof(*sense));
461
462 /*
463 * FIXME: we should probably abort/retry or something in case of
464 * failure.
465 */
466 failed = (rq->rq_flags & RQF_FAILED) != 0;
467 if (failed) {
468 /*
469 * The request failed. Retry if it was due to a unit
470 * attention status (usually means media was changed).
471 */
472 struct request_sense *reqbuf = scsi_req(rq)->sense;
473
474 if (reqbuf->sense_key == UNIT_ATTENTION)
475 cdrom_saw_media_change(drive);
476 else if (reqbuf->sense_key == NOT_READY &&
477 reqbuf->asc == 4 && reqbuf->ascq != 4) {
478 /*
479 * The drive is in the process of loading
480 * a disk. Retry, but wait a little to give
481 * the drive time to complete the load.
482 */
483 delay = true;
484 } else {
485 /* otherwise, don't retry */
486 retries = 0;
487 }
488 --retries;
489 }
490 blk_put_request(rq);
491 if (delay)
492 ssleep(2);
493 } while (failed && retries >= 0);
494
495 /* return an error if the command failed */
496 return failed ? -EIO : 0;
497 }
498
499 /*
500 * returns true if rq has been completed
501 */
502 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
503 {
504 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
505
506 if (cmd->tf_flags & IDE_TFLAG_WRITE)
507 nr_bytes -= cmd->last_xfer_len;
508
509 if (nr_bytes > 0) {
510 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
511 return true;
512 }
513
514 return false;
515 }
516
517 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
518 {
519 ide_hwif_t *hwif = drive->hwif;
520 struct ide_cmd *cmd = &hwif->cmd;
521 struct request *rq = hwif->rq;
522 ide_expiry_t *expiry = NULL;
523 int dma_error = 0, dma, thislen, uptodate = 0;
524 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
525 int sense = ata_sense_request(rq);
526 unsigned int timeout;
527 u16 len;
528 u8 ireason, stat;
529
530 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
531
532 /* check for errors */
533 dma = drive->dma;
534 if (dma) {
535 drive->dma = 0;
536 drive->waiting_for_dma = 0;
537 dma_error = hwif->dma_ops->dma_end(drive);
538 ide_dma_unmap_sg(drive, cmd);
539 if (dma_error) {
540 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
541 write ? "write" : "read");
542 ide_dma_off(drive);
543 }
544 }
545
546 /* check status */
547 stat = hwif->tp_ops->read_status(hwif);
548
549 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
550 rc = cdrom_decode_status(drive, stat);
551 if (rc) {
552 if (rc == 2)
553 goto out_end;
554 return ide_stopped;
555 }
556 }
557
558 /* using dma, transfer is complete now */
559 if (dma) {
560 if (dma_error)
561 return ide_error(drive, "dma error", stat);
562 uptodate = 1;
563 goto out_end;
564 }
565
566 ide_read_bcount_and_ireason(drive, &len, &ireason);
567
568 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
569 if (thislen > len)
570 thislen = len;
571
572 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
573 stat, thislen);
574
575 /* If DRQ is clear, the command has completed. */
576 if ((stat & ATA_DRQ) == 0) {
577 switch (req_op(rq)) {
578 default:
579 /*
580 * If we're not done reading/writing, complain.
581 * Otherwise, complete the command normally.
582 */
583 uptodate = 1;
584 if (cmd->nleft > 0) {
585 printk(KERN_ERR PFX "%s: %s: data underrun "
586 "(%u bytes)\n", drive->name, __func__,
587 cmd->nleft);
588 if (!write)
589 rq->rq_flags |= RQF_FAILED;
590 uptodate = 0;
591 }
592 goto out_end;
593 case REQ_OP_DRV_IN:
594 case REQ_OP_DRV_OUT:
595 ide_cd_request_sense_fixup(drive, cmd);
596
597 uptodate = cmd->nleft ? 0 : 1;
598
599 /*
600 * suck out the remaining bytes from the drive in an
601 * attempt to complete the data xfer. (see BZ#13399)
602 */
603 if (!(stat & ATA_ERR) && !uptodate && thislen) {
604 ide_pio_bytes(drive, cmd, write, thislen);
605 uptodate = cmd->nleft ? 0 : 1;
606 }
607
608 if (!uptodate)
609 rq->rq_flags |= RQF_FAILED;
610 goto out_end;
611 case REQ_OP_SCSI_IN:
612 case REQ_OP_SCSI_OUT:
613 goto out_end;
614 }
615 }
616
617 rc = ide_check_ireason(drive, rq, len, ireason, write);
618 if (rc)
619 goto out_end;
620
621 cmd->last_xfer_len = 0;
622
623 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
624 "ireason: 0x%x",
625 rq->cmd_type, ireason);
626
627 /* transfer data */
628 while (thislen > 0) {
629 int blen = min_t(int, thislen, cmd->nleft);
630
631 if (cmd->nleft == 0)
632 break;
633
634 ide_pio_bytes(drive, cmd, write, blen);
635 cmd->last_xfer_len += blen;
636
637 thislen -= blen;
638 len -= blen;
639
640 if (sense && write == 0)
641 scsi_req(rq)->sense_len += blen;
642 }
643
644 /* pad, if necessary */
645 if (len > 0) {
646 if (blk_rq_is_passthrough(rq) || write == 0)
647 ide_pad_transfer(drive, write, len);
648 else {
649 printk(KERN_ERR PFX "%s: confused, missing data\n",
650 drive->name);
651 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
652 }
653 }
654
655 switch (req_op(rq)) {
656 case REQ_OP_SCSI_IN:
657 case REQ_OP_SCSI_OUT:
658 timeout = rq->timeout;
659 break;
660 case REQ_OP_DRV_IN:
661 case REQ_OP_DRV_OUT:
662 expiry = ide_cd_expiry;
663 /*FALLTHRU*/
664 default:
665 timeout = ATAPI_WAIT_PC;
666 break;
667 }
668
669 hwif->expiry = expiry;
670 ide_set_handler(drive, cdrom_newpc_intr, timeout);
671 return ide_started;
672
673 out_end:
674 if (blk_rq_is_scsi(rq) && rc == 0) {
675 scsi_req(rq)->resid_len = 0;
676 blk_end_request_all(rq, BLK_STS_OK);
677 hwif->rq = NULL;
678 } else {
679 if (sense && uptodate)
680 ide_cd_complete_failed_rq(drive, rq);
681
682 if (!blk_rq_is_passthrough(rq)) {
683 if (cmd->nleft == 0)
684 uptodate = 1;
685 } else {
686 if (uptodate <= 0 && scsi_req(rq)->result == 0)
687 scsi_req(rq)->result = -EIO;
688 }
689
690 if (uptodate == 0 && rq->bio)
691 if (ide_cd_error_cmd(drive, cmd))
692 return ide_stopped;
693
694 /* make sure it's fully ended */
695 if (blk_rq_is_passthrough(rq)) {
696 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
697 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
698 scsi_req(rq)->resid_len += cmd->last_xfer_len;
699 }
700
701 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
702
703 if (sense && rc == 2)
704 ide_error(drive, "request sense failure", stat);
705 }
706 return ide_stopped;
707 }
708
709 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
710 {
711 struct cdrom_info *cd = drive->driver_data;
712 struct request_queue *q = drive->queue;
713 int write = rq_data_dir(rq) == WRITE;
714 unsigned short sectors_per_frame =
715 queue_logical_block_size(q) >> SECTOR_BITS;
716
717 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
718 "secs_per_frame: %u",
719 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
720
721 if (write) {
722 /* disk has become write protected */
723 if (get_disk_ro(cd->disk))
724 return ide_stopped;
725 } else {
726 /*
727 * We may be retrying this request after an error. Fix up any
728 * weirdness which might be present in the request packet.
729 */
730 q->prep_rq_fn(q, rq);
731 }
732
733 /* fs requests *must* be hardware frame aligned */
734 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
735 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
736 return ide_stopped;
737
738 /* use DMA, if possible */
739 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
740
741 if (write)
742 cd->devinfo.media_written = 1;
743
744 rq->timeout = ATAPI_WAIT_PC;
745
746 return ide_started;
747 }
748
749 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
750 {
751
752 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
753 rq->cmd[0], rq->cmd_type);
754
755 if (blk_rq_is_scsi(rq))
756 rq->rq_flags |= RQF_QUIET;
757 else
758 rq->rq_flags &= ~RQF_FAILED;
759
760 drive->dma = 0;
761
762 /* sg request */
763 if (rq->bio) {
764 struct request_queue *q = drive->queue;
765 char *buf = bio_data(rq->bio);
766 unsigned int alignment;
767
768 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
769
770 /*
771 * check if dma is safe
772 *
773 * NOTE! The "len" and "addr" checks should possibly have
774 * separate masks.
775 */
776 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
777 if ((unsigned long)buf & alignment
778 || blk_rq_bytes(rq) & q->dma_pad_mask
779 || object_is_on_stack(buf))
780 drive->dma = 0;
781 }
782 }
783
784 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
785 sector_t block)
786 {
787 struct ide_cmd cmd;
788 int uptodate = 0;
789 unsigned int nsectors;
790
791 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
792 rq->cmd[0], (unsigned long long)block);
793
794 if (drive->debug_mask & IDE_DBG_RQ)
795 blk_dump_rq_flags(rq, "ide_cd_do_request");
796
797 switch (req_op(rq)) {
798 default:
799 if (cdrom_start_rw(drive, rq) == ide_stopped)
800 goto out_end;
801 break;
802 case REQ_OP_SCSI_IN:
803 case REQ_OP_SCSI_OUT:
804 handle_pc:
805 if (!rq->timeout)
806 rq->timeout = ATAPI_WAIT_PC;
807 cdrom_do_block_pc(drive, rq);
808 break;
809 case REQ_OP_DRV_IN:
810 case REQ_OP_DRV_OUT:
811 switch (ide_req(rq)->type) {
812 case ATA_PRIV_MISC:
813 /* right now this can only be a reset... */
814 uptodate = 1;
815 goto out_end;
816 case ATA_PRIV_SENSE:
817 case ATA_PRIV_PC:
818 goto handle_pc;
819 default:
820 BUG();
821 }
822 }
823
824 /* prepare sense request for this command */
825 ide_prep_sense(drive, rq);
826
827 memset(&cmd, 0, sizeof(cmd));
828
829 if (rq_data_dir(rq))
830 cmd.tf_flags |= IDE_TFLAG_WRITE;
831
832 cmd.rq = rq;
833
834 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
835 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
836 ide_map_sg(drive, &cmd);
837 }
838
839 return ide_issue_pc(drive, &cmd);
840 out_end:
841 nsectors = blk_rq_sectors(rq);
842
843 if (nsectors == 0)
844 nsectors = 1;
845
846 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
847
848 return ide_stopped;
849 }
850
851 /*
852 * Ioctl handling.
853 *
854 * Routines which queue packet commands take as a final argument a pointer to a
855 * request_sense struct. If execution of the command results in an error with a
856 * CHECK CONDITION status, this structure will be filled with the results of the
857 * subsequent request sense command. The pointer can also be NULL, in which case
858 * no sense information is returned.
859 */
860 static void msf_from_bcd(struct atapi_msf *msf)
861 {
862 msf->minute = bcd2bin(msf->minute);
863 msf->second = bcd2bin(msf->second);
864 msf->frame = bcd2bin(msf->frame);
865 }
866
867 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
868 {
869 struct cdrom_info *info = drive->driver_data;
870 struct cdrom_device_info *cdi;
871 unsigned char cmd[BLK_MAX_CDB];
872
873 ide_debug_log(IDE_DBG_FUNC, "enter");
874
875 if (!info)
876 return -EIO;
877
878 cdi = &info->devinfo;
879
880 memset(cmd, 0, BLK_MAX_CDB);
881 cmd[0] = GPCMD_TEST_UNIT_READY;
882
883 /*
884 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
885 * instead of supporting the LOAD_UNLOAD opcode.
886 */
887 cmd[7] = cdi->sanyo_slot % 3;
888
889 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, RQF_QUIET);
890 }
891
892 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
893 unsigned long *sectors_per_frame,
894 struct request_sense *sense)
895 {
896 struct {
897 __be32 lba;
898 __be32 blocklen;
899 } capbuf;
900
901 int stat;
902 unsigned char cmd[BLK_MAX_CDB];
903 unsigned len = sizeof(capbuf);
904 u32 blocklen;
905
906 ide_debug_log(IDE_DBG_FUNC, "enter");
907
908 memset(cmd, 0, BLK_MAX_CDB);
909 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
910
911 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
912 RQF_QUIET);
913 if (stat)
914 return stat;
915
916 /*
917 * Sanity check the given block size, in so far as making
918 * sure the sectors_per_frame we give to the caller won't
919 * end up being bogus.
920 */
921 blocklen = be32_to_cpu(capbuf.blocklen);
922 blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
923 switch (blocklen) {
924 case 512:
925 case 1024:
926 case 2048:
927 case 4096:
928 break;
929 default:
930 printk_once(KERN_ERR PFX "%s: weird block size %u; "
931 "setting default block size to 2048\n",
932 drive->name, blocklen);
933 blocklen = 2048;
934 break;
935 }
936
937 *capacity = 1 + be32_to_cpu(capbuf.lba);
938 *sectors_per_frame = blocklen >> SECTOR_BITS;
939
940 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
941 *capacity, *sectors_per_frame);
942
943 return 0;
944 }
945
946 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
947 int format, char *buf, int buflen,
948 struct request_sense *sense)
949 {
950 unsigned char cmd[BLK_MAX_CDB];
951
952 ide_debug_log(IDE_DBG_FUNC, "enter");
953
954 memset(cmd, 0, BLK_MAX_CDB);
955
956 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
957 cmd[6] = trackno;
958 cmd[7] = (buflen >> 8);
959 cmd[8] = (buflen & 0xff);
960 cmd[9] = (format << 6);
961
962 if (msf_flag)
963 cmd[1] = 2;
964
965 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, RQF_QUIET);
966 }
967
968 /* Try to read the entire TOC for the disk into our internal buffer. */
969 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
970 {
971 int stat, ntracks, i;
972 struct cdrom_info *info = drive->driver_data;
973 struct cdrom_device_info *cdi = &info->devinfo;
974 struct atapi_toc *toc = info->toc;
975 struct {
976 struct atapi_toc_header hdr;
977 struct atapi_toc_entry ent;
978 } ms_tmp;
979 long last_written;
980 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
981
982 ide_debug_log(IDE_DBG_FUNC, "enter");
983
984 if (toc == NULL) {
985 /* try to allocate space */
986 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
987 if (toc == NULL) {
988 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
989 drive->name);
990 return -ENOMEM;
991 }
992 info->toc = toc;
993 }
994
995 /*
996 * Check to see if the existing data is still valid. If it is,
997 * just return.
998 */
999 (void) cdrom_check_status(drive, sense);
1000
1001 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1002 return 0;
1003
1004 /* try to get the total cdrom capacity and sector size */
1005 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1006 sense);
1007 if (stat)
1008 toc->capacity = 0x1fffff;
1009
1010 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1011 /* save a private copy of the TOC capacity for error handling */
1012 drive->probed_capacity = toc->capacity * sectors_per_frame;
1013
1014 blk_queue_logical_block_size(drive->queue,
1015 sectors_per_frame << SECTOR_BITS);
1016
1017 /* first read just the header, so we know how long the TOC is */
1018 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1019 sizeof(struct atapi_toc_header), sense);
1020 if (stat)
1021 return stat;
1022
1023 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1024 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1025 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1026 }
1027
1028 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1029 if (ntracks <= 0)
1030 return -EIO;
1031 if (ntracks > MAX_TRACKS)
1032 ntracks = MAX_TRACKS;
1033
1034 /* now read the whole schmeer */
1035 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1036 (char *)&toc->hdr,
1037 sizeof(struct atapi_toc_header) +
1038 (ntracks + 1) *
1039 sizeof(struct atapi_toc_entry), sense);
1040
1041 if (stat && toc->hdr.first_track > 1) {
1042 /*
1043 * Cds with CDI tracks only don't have any TOC entries, despite
1044 * of this the returned values are
1045 * first_track == last_track = number of CDI tracks + 1,
1046 * so that this case is indistinguishable from the same layout
1047 * plus an additional audio track. If we get an error for the
1048 * regular case, we assume a CDI without additional audio
1049 * tracks. In this case the readable TOC is empty (CDI tracks
1050 * are not included) and only holds the Leadout entry.
1051 *
1052 * Heiko Eißfeldt.
1053 */
1054 ntracks = 0;
1055 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1056 (char *)&toc->hdr,
1057 sizeof(struct atapi_toc_header) +
1058 (ntracks + 1) *
1059 sizeof(struct atapi_toc_entry),
1060 sense);
1061 if (stat)
1062 return stat;
1063
1064 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1065 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1066 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1067 } else {
1068 toc->hdr.first_track = CDROM_LEADOUT;
1069 toc->hdr.last_track = CDROM_LEADOUT;
1070 }
1071 }
1072
1073 if (stat)
1074 return stat;
1075
1076 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1077
1078 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1079 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1080 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1081 }
1082
1083 for (i = 0; i <= ntracks; i++) {
1084 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1085 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1086 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1087 msf_from_bcd(&toc->ent[i].addr.msf);
1088 }
1089 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1090 toc->ent[i].addr.msf.second,
1091 toc->ent[i].addr.msf.frame);
1092 }
1093
1094 if (toc->hdr.first_track != CDROM_LEADOUT) {
1095 /* read the multisession information */
1096 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1097 sizeof(ms_tmp), sense);
1098 if (stat)
1099 return stat;
1100
1101 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1102 } else {
1103 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1104 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1105 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1106 }
1107
1108 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1109 /* re-read multisession information using MSF format */
1110 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1111 sizeof(ms_tmp), sense);
1112 if (stat)
1113 return stat;
1114
1115 msf_from_bcd(&ms_tmp.ent.addr.msf);
1116 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1117 ms_tmp.ent.addr.msf.second,
1118 ms_tmp.ent.addr.msf.frame);
1119 }
1120
1121 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1122
1123 /* now try to get the total cdrom capacity */
1124 stat = cdrom_get_last_written(cdi, &last_written);
1125 if (!stat && (last_written > toc->capacity)) {
1126 toc->capacity = last_written;
1127 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1128 drive->probed_capacity = toc->capacity * sectors_per_frame;
1129 }
1130
1131 /* Remember that we've read this stuff. */
1132 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1133
1134 return 0;
1135 }
1136
1137 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1138 {
1139 struct cdrom_info *info = drive->driver_data;
1140 struct cdrom_device_info *cdi = &info->devinfo;
1141 struct packet_command cgc;
1142 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1143
1144 ide_debug_log(IDE_DBG_FUNC, "enter");
1145
1146 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1147 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1148
1149 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1150 do {
1151 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1152 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1153 if (!stat)
1154 break;
1155 } while (--attempts);
1156 return stat;
1157 }
1158
1159 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1160 {
1161 struct cdrom_info *cd = drive->driver_data;
1162 u16 curspeed, maxspeed;
1163
1164 ide_debug_log(IDE_DBG_FUNC, "enter");
1165
1166 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1167 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1168 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1169 } else {
1170 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1171 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1172 }
1173
1174 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1175 curspeed, maxspeed);
1176
1177 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1178 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1179 }
1180
1181 #define IDE_CD_CAPABILITIES \
1182 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1183 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1184 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1185 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1186 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1187
1188 static const struct cdrom_device_ops ide_cdrom_dops = {
1189 .open = ide_cdrom_open_real,
1190 .release = ide_cdrom_release_real,
1191 .drive_status = ide_cdrom_drive_status,
1192 .check_events = ide_cdrom_check_events_real,
1193 .tray_move = ide_cdrom_tray_move,
1194 .lock_door = ide_cdrom_lock_door,
1195 .select_speed = ide_cdrom_select_speed,
1196 .get_last_session = ide_cdrom_get_last_session,
1197 .get_mcn = ide_cdrom_get_mcn,
1198 .reset = ide_cdrom_reset,
1199 .audio_ioctl = ide_cdrom_audio_ioctl,
1200 .capability = IDE_CD_CAPABILITIES,
1201 .generic_packet = ide_cdrom_packet,
1202 };
1203
1204 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1205 {
1206 struct cdrom_info *info = drive->driver_data;
1207 struct cdrom_device_info *devinfo = &info->devinfo;
1208
1209 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1210
1211 devinfo->ops = &ide_cdrom_dops;
1212 devinfo->speed = info->current_speed;
1213 devinfo->capacity = nslots;
1214 devinfo->handle = drive;
1215 strcpy(devinfo->name, drive->name);
1216
1217 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1218 devinfo->mask |= CDC_SELECT_SPEED;
1219
1220 devinfo->disk = info->disk;
1221 return register_cdrom(devinfo);
1222 }
1223
1224 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1225 {
1226 struct cdrom_info *cd = drive->driver_data;
1227 struct cdrom_device_info *cdi = &cd->devinfo;
1228 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1229 mechtype_t mechtype;
1230 int nslots = 1;
1231
1232 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1233 drive->media, drive->atapi_flags);
1234
1235 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1236 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1237 CDC_MO_DRIVE | CDC_RAM);
1238
1239 if (drive->media == ide_optical) {
1240 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1241 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1242 drive->name);
1243 return nslots;
1244 }
1245
1246 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1247 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1248 cdi->mask &= ~CDC_PLAY_AUDIO;
1249 return nslots;
1250 }
1251
1252 /*
1253 * We have to cheat a little here. the packet will eventually be queued
1254 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1255 * Since this device hasn't been registered with the Uniform layer yet,
1256 * it can't do this. Same goes for cdi->ops.
1257 */
1258 cdi->handle = drive;
1259 cdi->ops = &ide_cdrom_dops;
1260
1261 if (ide_cdrom_get_capabilities(drive, buf))
1262 return 0;
1263
1264 if ((buf[8 + 6] & 0x01) == 0)
1265 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1266 if (buf[8 + 6] & 0x08)
1267 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1268 if (buf[8 + 3] & 0x01)
1269 cdi->mask &= ~CDC_CD_R;
1270 if (buf[8 + 3] & 0x02)
1271 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1272 if (buf[8 + 2] & 0x38)
1273 cdi->mask &= ~CDC_DVD;
1274 if (buf[8 + 3] & 0x20)
1275 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1276 if (buf[8 + 3] & 0x10)
1277 cdi->mask &= ~CDC_DVD_R;
1278 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1279 cdi->mask &= ~CDC_PLAY_AUDIO;
1280
1281 mechtype = buf[8 + 6] >> 5;
1282 if (mechtype == mechtype_caddy ||
1283 mechtype == mechtype_popup ||
1284 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1285 cdi->mask |= CDC_CLOSE_TRAY;
1286
1287 if (cdi->sanyo_slot > 0) {
1288 cdi->mask &= ~CDC_SELECT_DISC;
1289 nslots = 3;
1290 } else if (mechtype == mechtype_individual_changer ||
1291 mechtype == mechtype_cartridge_changer) {
1292 nslots = cdrom_number_of_slots(cdi);
1293 if (nslots > 1)
1294 cdi->mask &= ~CDC_SELECT_DISC;
1295 }
1296
1297 ide_cdrom_update_speed(drive, buf);
1298
1299 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1300
1301 /* don't print speed if the drive reported 0 */
1302 if (cd->max_speed)
1303 printk(KERN_CONT " %dX", cd->max_speed);
1304
1305 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1306
1307 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1308 printk(KERN_CONT " DVD%s%s",
1309 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1310 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1311
1312 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1313 printk(KERN_CONT " CD%s%s",
1314 (cdi->mask & CDC_CD_R) ? "" : "-R",
1315 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1316
1317 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1318 printk(KERN_CONT " changer w/%d slots", nslots);
1319 else
1320 printk(KERN_CONT " drive");
1321
1322 printk(KERN_CONT ", %dkB Cache\n",
1323 be16_to_cpup((__be16 *)&buf[8 + 12]));
1324
1325 return nslots;
1326 }
1327
1328 /* standard prep_rq_fn that builds 10 byte cmds */
1329 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1330 {
1331 int hard_sect = queue_logical_block_size(q);
1332 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1333 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1334 struct scsi_request *req = scsi_req(rq);
1335
1336 q->initialize_rq_fn(rq);
1337
1338 if (rq_data_dir(rq) == READ)
1339 req->cmd[0] = GPCMD_READ_10;
1340 else
1341 req->cmd[0] = GPCMD_WRITE_10;
1342
1343 /*
1344 * fill in lba
1345 */
1346 req->cmd[2] = (block >> 24) & 0xff;
1347 req->cmd[3] = (block >> 16) & 0xff;
1348 req->cmd[4] = (block >> 8) & 0xff;
1349 req->cmd[5] = block & 0xff;
1350
1351 /*
1352 * and transfer length
1353 */
1354 req->cmd[7] = (blocks >> 8) & 0xff;
1355 req->cmd[8] = blocks & 0xff;
1356 req->cmd_len = 10;
1357 return BLKPREP_OK;
1358 }
1359
1360 /*
1361 * Most of the SCSI commands are supported directly by ATAPI devices.
1362 * This transform handles the few exceptions.
1363 */
1364 static int ide_cdrom_prep_pc(struct request *rq)
1365 {
1366 u8 *c = scsi_req(rq)->cmd;
1367
1368 /* transform 6-byte read/write commands to the 10-byte version */
1369 if (c[0] == READ_6 || c[0] == WRITE_6) {
1370 c[8] = c[4];
1371 c[5] = c[3];
1372 c[4] = c[2];
1373 c[3] = c[1] & 0x1f;
1374 c[2] = 0;
1375 c[1] &= 0xe0;
1376 c[0] += (READ_10 - READ_6);
1377 scsi_req(rq)->cmd_len = 10;
1378 return BLKPREP_OK;
1379 }
1380
1381 /*
1382 * it's silly to pretend we understand 6-byte sense commands, just
1383 * reject with ILLEGAL_REQUEST and the caller should take the
1384 * appropriate action
1385 */
1386 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1387 scsi_req(rq)->result = ILLEGAL_REQUEST;
1388 return BLKPREP_KILL;
1389 }
1390
1391 return BLKPREP_OK;
1392 }
1393
1394 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1395 {
1396 if (!blk_rq_is_passthrough(rq))
1397 return ide_cdrom_prep_fs(q, rq);
1398 else if (blk_rq_is_scsi(rq))
1399 return ide_cdrom_prep_pc(rq);
1400
1401 return 0;
1402 }
1403
1404 struct cd_list_entry {
1405 const char *id_model;
1406 const char *id_firmware;
1407 unsigned int cd_flags;
1408 };
1409
1410 #ifdef CONFIG_IDE_PROC_FS
1411 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1412 {
1413 unsigned long capacity, sectors_per_frame;
1414
1415 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1416 return 0;
1417
1418 return capacity * sectors_per_frame;
1419 }
1420
1421 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1422 {
1423 ide_drive_t *drive = m->private;
1424
1425 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1426 return 0;
1427 }
1428
1429 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1430 {
1431 return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
1432 }
1433
1434 static const struct file_operations idecd_capacity_proc_fops = {
1435 .owner = THIS_MODULE,
1436 .open = idecd_capacity_proc_open,
1437 .read = seq_read,
1438 .llseek = seq_lseek,
1439 .release = single_release,
1440 };
1441
1442 static ide_proc_entry_t idecd_proc[] = {
1443 { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1444 {}
1445 };
1446
1447 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1448 {
1449 return idecd_proc;
1450 }
1451
1452 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1453 {
1454 return NULL;
1455 }
1456 #endif
1457
1458 static const struct cd_list_entry ide_cd_quirks_list[] = {
1459 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1460 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1461 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1462 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1463 IDE_AFLAG_PRE_ATAPI12, },
1464 /* Vertos 300, some versions of this drive like to talk BCD. */
1465 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1466 /* Vertos 600 ESD. */
1467 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1468 /*
1469 * Sanyo 3 CD changer uses a non-standard command for CD changing
1470 * (by default standard ATAPI support for CD changers is used).
1471 */
1472 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1473 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1474 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1475 /* Stingray 8X CD-ROM. */
1476 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1477 /*
1478 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1479 * mode sense page capabilities size, but older drives break.
1480 */
1481 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1482 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1483 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1484 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1485 /*
1486 * Some drives used by Apple don't advertise audio play
1487 * but they do support reading TOC & audio datas.
1488 */
1489 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1490 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1491 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1492 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1493 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1494 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1495 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1496 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1497 { NULL, NULL, 0 }
1498 };
1499
1500 static unsigned int ide_cd_flags(u16 *id)
1501 {
1502 const struct cd_list_entry *cle = ide_cd_quirks_list;
1503
1504 while (cle->id_model) {
1505 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1506 (cle->id_firmware == NULL ||
1507 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1508 return cle->cd_flags;
1509 cle++;
1510 }
1511
1512 return 0;
1513 }
1514
1515 static int ide_cdrom_setup(ide_drive_t *drive)
1516 {
1517 struct cdrom_info *cd = drive->driver_data;
1518 struct cdrom_device_info *cdi = &cd->devinfo;
1519 struct request_queue *q = drive->queue;
1520 u16 *id = drive->id;
1521 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1522 int nslots;
1523
1524 ide_debug_log(IDE_DBG_PROBE, "enter");
1525
1526 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1527 blk_queue_dma_alignment(q, 31);
1528 blk_queue_update_dma_pad(q, 15);
1529
1530 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1531 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1532
1533 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1534 fw_rev[4] == '1' && fw_rev[6] <= '2')
1535 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1536 IDE_AFLAG_TOCADDR_AS_BCD);
1537 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1538 fw_rev[4] == '1' && fw_rev[6] <= '2')
1539 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1540 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1541 /* 3 => use CD in slot 0 */
1542 cdi->sanyo_slot = 3;
1543
1544 nslots = ide_cdrom_probe_capabilities(drive);
1545
1546 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1547
1548 if (ide_cdrom_register(drive, nslots)) {
1549 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1550 " cdrom driver.\n", drive->name, __func__);
1551 cd->devinfo.handle = NULL;
1552 return 1;
1553 }
1554
1555 ide_proc_register_driver(drive, cd->driver);
1556 return 0;
1557 }
1558
1559 static void ide_cd_remove(ide_drive_t *drive)
1560 {
1561 struct cdrom_info *info = drive->driver_data;
1562
1563 ide_debug_log(IDE_DBG_FUNC, "enter");
1564
1565 ide_proc_unregister_driver(drive, info->driver);
1566 device_del(&info->dev);
1567 del_gendisk(info->disk);
1568
1569 mutex_lock(&idecd_ref_mutex);
1570 put_device(&info->dev);
1571 mutex_unlock(&idecd_ref_mutex);
1572 }
1573
1574 static void ide_cd_release(struct device *dev)
1575 {
1576 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1577 struct cdrom_device_info *devinfo = &info->devinfo;
1578 ide_drive_t *drive = info->drive;
1579 struct gendisk *g = info->disk;
1580
1581 ide_debug_log(IDE_DBG_FUNC, "enter");
1582
1583 kfree(info->toc);
1584 if (devinfo->handle == drive)
1585 unregister_cdrom(devinfo);
1586 drive->driver_data = NULL;
1587 blk_queue_prep_rq(drive->queue, NULL);
1588 g->private_data = NULL;
1589 put_disk(g);
1590 kfree(info);
1591 }
1592
1593 static int ide_cd_probe(ide_drive_t *);
1594
1595 static struct ide_driver ide_cdrom_driver = {
1596 .gen_driver = {
1597 .owner = THIS_MODULE,
1598 .name = "ide-cdrom",
1599 .bus = &ide_bus_type,
1600 },
1601 .probe = ide_cd_probe,
1602 .remove = ide_cd_remove,
1603 .version = IDECD_VERSION,
1604 .do_request = ide_cd_do_request,
1605 #ifdef CONFIG_IDE_PROC_FS
1606 .proc_entries = ide_cd_proc_entries,
1607 .proc_devsets = ide_cd_proc_devsets,
1608 #endif
1609 };
1610
1611 static int idecd_open(struct block_device *bdev, fmode_t mode)
1612 {
1613 struct cdrom_info *info;
1614 int rc = -ENXIO;
1615
1616 mutex_lock(&ide_cd_mutex);
1617 info = ide_cd_get(bdev->bd_disk);
1618 if (!info)
1619 goto out;
1620
1621 rc = cdrom_open(&info->devinfo, bdev, mode);
1622 if (rc < 0)
1623 ide_cd_put(info);
1624 out:
1625 mutex_unlock(&ide_cd_mutex);
1626 return rc;
1627 }
1628
1629 static void idecd_release(struct gendisk *disk, fmode_t mode)
1630 {
1631 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1632
1633 mutex_lock(&ide_cd_mutex);
1634 cdrom_release(&info->devinfo, mode);
1635
1636 ide_cd_put(info);
1637 mutex_unlock(&ide_cd_mutex);
1638 }
1639
1640 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1641 {
1642 struct packet_command cgc;
1643 char buffer[16];
1644 int stat;
1645 char spindown;
1646
1647 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1648 return -EFAULT;
1649
1650 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1651
1652 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1653 if (stat)
1654 return stat;
1655
1656 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1657 return cdrom_mode_select(cdi, &cgc);
1658 }
1659
1660 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1661 {
1662 struct packet_command cgc;
1663 char buffer[16];
1664 int stat;
1665 char spindown;
1666
1667 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1668
1669 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1670 if (stat)
1671 return stat;
1672
1673 spindown = buffer[11] & 0x0f;
1674 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1675 return -EFAULT;
1676 return 0;
1677 }
1678
1679 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1680 unsigned int cmd, unsigned long arg)
1681 {
1682 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1683 int err;
1684
1685 switch (cmd) {
1686 case CDROMSETSPINDOWN:
1687 return idecd_set_spindown(&info->devinfo, arg);
1688 case CDROMGETSPINDOWN:
1689 return idecd_get_spindown(&info->devinfo, arg);
1690 default:
1691 break;
1692 }
1693
1694 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1695 if (err == -EINVAL)
1696 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1697
1698 return err;
1699 }
1700
1701 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1702 unsigned int cmd, unsigned long arg)
1703 {
1704 int ret;
1705
1706 mutex_lock(&ide_cd_mutex);
1707 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1708 mutex_unlock(&ide_cd_mutex);
1709
1710 return ret;
1711 }
1712
1713
1714 static unsigned int idecd_check_events(struct gendisk *disk,
1715 unsigned int clearing)
1716 {
1717 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1718 return cdrom_check_events(&info->devinfo, clearing);
1719 }
1720
1721 static int idecd_revalidate_disk(struct gendisk *disk)
1722 {
1723 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1724 struct request_sense sense;
1725
1726 ide_cd_read_toc(info->drive, &sense);
1727
1728 return 0;
1729 }
1730
1731 static const struct block_device_operations idecd_ops = {
1732 .owner = THIS_MODULE,
1733 .open = idecd_open,
1734 .release = idecd_release,
1735 .ioctl = idecd_ioctl,
1736 .check_events = idecd_check_events,
1737 .revalidate_disk = idecd_revalidate_disk
1738 };
1739
1740 /* module options */
1741 static unsigned long debug_mask;
1742 module_param(debug_mask, ulong, 0644);
1743
1744 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1745
1746 static int ide_cd_probe(ide_drive_t *drive)
1747 {
1748 struct cdrom_info *info;
1749 struct gendisk *g;
1750 struct request_sense sense;
1751
1752 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1753 drive->driver_req, drive->media);
1754
1755 if (!strstr("ide-cdrom", drive->driver_req))
1756 goto failed;
1757
1758 if (drive->media != ide_cdrom && drive->media != ide_optical)
1759 goto failed;
1760
1761 drive->debug_mask = debug_mask;
1762 drive->irq_handler = cdrom_newpc_intr;
1763
1764 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1765 if (info == NULL) {
1766 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1767 drive->name);
1768 goto failed;
1769 }
1770
1771 g = alloc_disk(1 << PARTN_BITS);
1772 if (!g)
1773 goto out_free_cd;
1774
1775 ide_init_disk(g, drive);
1776
1777 info->dev.parent = &drive->gendev;
1778 info->dev.release = ide_cd_release;
1779 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1780
1781 if (device_register(&info->dev))
1782 goto out_free_disk;
1783
1784 info->drive = drive;
1785 info->driver = &ide_cdrom_driver;
1786 info->disk = g;
1787
1788 g->private_data = &info->driver;
1789
1790 drive->driver_data = info;
1791
1792 g->minors = 1;
1793 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1794 if (ide_cdrom_setup(drive)) {
1795 put_device(&info->dev);
1796 goto failed;
1797 }
1798
1799 ide_cd_read_toc(drive, &sense);
1800 g->fops = &idecd_ops;
1801 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1802 device_add_disk(&drive->gendev, g);
1803 return 0;
1804
1805 out_free_disk:
1806 put_disk(g);
1807 out_free_cd:
1808 kfree(info);
1809 failed:
1810 return -ENODEV;
1811 }
1812
1813 static void __exit ide_cdrom_exit(void)
1814 {
1815 driver_unregister(&ide_cdrom_driver.gen_driver);
1816 }
1817
1818 static int __init ide_cdrom_init(void)
1819 {
1820 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1821 return driver_register(&ide_cdrom_driver.gen_driver);
1822 }
1823
1824 MODULE_ALIAS("ide:*m-cdrom*");
1825 MODULE_ALIAS("ide-cd");
1826 module_init(ide_cdrom_init);
1827 module_exit(ide_cdrom_exit);
1828 MODULE_LICENSE("GPL");
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