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thermal/drivers/hisi: Set the thermal zone private data to the sensor pointer
[linux/fpc-iii.git] / drivers / ide / ide-cd.c
blob44a7a255ef74a5b43527c3e9ec7f9fa047838f92
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 scsi_sense_hdr *sshdr, int timeout,
423 req_flags_t rq_flags)
424 {
425 struct cdrom_info *info = drive->driver_data;
426 struct scsi_sense_hdr local_sshdr;
427 int retries = 10;
428 bool failed;
429
430 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
431 "rq_flags: 0x%x",
432 cmd[0], write, timeout, rq_flags);
433
434 if (!sshdr)
435 sshdr = &local_sshdr;
436
437 /* start of retry loop */
438 do {
439 struct request *rq;
440 int error;
441 bool delay = false;
442
443 rq = blk_get_request(drive->queue,
444 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
445 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
446 ide_req(rq)->type = ATA_PRIV_PC;
447 rq->rq_flags |= rq_flags;
448 rq->timeout = timeout;
449 if (buffer) {
450 error = blk_rq_map_kern(drive->queue, rq, buffer,
451 *bufflen, GFP_NOIO);
452 if (error) {
453 blk_put_request(rq);
454 return error;
455 }
456 }
457
458 blk_execute_rq(drive->queue, info->disk, rq, 0);
459 error = scsi_req(rq)->result ? -EIO : 0;
460
461 if (buffer)
462 *bufflen = scsi_req(rq)->resid_len;
463 scsi_normalize_sense(scsi_req(rq)->sense,
464 scsi_req(rq)->sense_len, sshdr);
465
466 /*
467 * FIXME: we should probably abort/retry or something in case of
468 * failure.
469 */
470 failed = (rq->rq_flags & RQF_FAILED) != 0;
471 if (failed) {
472 /*
473 * The request failed. Retry if it was due to a unit
474 * attention status (usually means media was changed).
475 */
476 if (sshdr->sense_key == UNIT_ATTENTION)
477 cdrom_saw_media_change(drive);
478 else if (sshdr->sense_key == NOT_READY &&
479 sshdr->asc == 4 && sshdr->ascq != 4) {
480 /*
481 * The drive is in the process of loading
482 * a disk. Retry, but wait a little to give
483 * the drive time to complete the load.
484 */
485 delay = true;
486 } else {
487 /* otherwise, don't retry */
488 retries = 0;
489 }
490 --retries;
491 }
492 blk_put_request(rq);
493 if (delay)
494 ssleep(2);
495 } while (failed && retries >= 0);
496
497 /* return an error if the command failed */
498 return failed ? -EIO : 0;
499 }
500
501 /*
502 * returns true if rq has been completed
503 */
504 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
505 {
506 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
507
508 if (cmd->tf_flags & IDE_TFLAG_WRITE)
509 nr_bytes -= cmd->last_xfer_len;
510
511 if (nr_bytes > 0) {
512 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
513 return true;
514 }
515
516 return false;
517 }
518
519 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
520 {
521 ide_hwif_t *hwif = drive->hwif;
522 struct ide_cmd *cmd = &hwif->cmd;
523 struct request *rq = hwif->rq;
524 ide_expiry_t *expiry = NULL;
525 int dma_error = 0, dma, thislen, uptodate = 0;
526 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
527 int sense = ata_sense_request(rq);
528 unsigned int timeout;
529 u16 len;
530 u8 ireason, stat;
531
532 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
533
534 /* check for errors */
535 dma = drive->dma;
536 if (dma) {
537 drive->dma = 0;
538 drive->waiting_for_dma = 0;
539 dma_error = hwif->dma_ops->dma_end(drive);
540 ide_dma_unmap_sg(drive, cmd);
541 if (dma_error) {
542 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
543 write ? "write" : "read");
544 ide_dma_off(drive);
545 }
546 }
547
548 /* check status */
549 stat = hwif->tp_ops->read_status(hwif);
550
551 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
552 rc = cdrom_decode_status(drive, stat);
553 if (rc) {
554 if (rc == 2)
555 goto out_end;
556 return ide_stopped;
557 }
558 }
559
560 /* using dma, transfer is complete now */
561 if (dma) {
562 if (dma_error)
563 return ide_error(drive, "dma error", stat);
564 uptodate = 1;
565 goto out_end;
566 }
567
568 ide_read_bcount_and_ireason(drive, &len, &ireason);
569
570 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
571 if (thislen > len)
572 thislen = len;
573
574 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
575 stat, thislen);
576
577 /* If DRQ is clear, the command has completed. */
578 if ((stat & ATA_DRQ) == 0) {
579 switch (req_op(rq)) {
580 default:
581 /*
582 * If we're not done reading/writing, complain.
583 * Otherwise, complete the command normally.
584 */
585 uptodate = 1;
586 if (cmd->nleft > 0) {
587 printk(KERN_ERR PFX "%s: %s: data underrun "
588 "(%u bytes)\n", drive->name, __func__,
589 cmd->nleft);
590 if (!write)
591 rq->rq_flags |= RQF_FAILED;
592 uptodate = 0;
593 }
594 goto out_end;
595 case REQ_OP_DRV_IN:
596 case REQ_OP_DRV_OUT:
597 ide_cd_request_sense_fixup(drive, cmd);
598
599 uptodate = cmd->nleft ? 0 : 1;
600
601 /*
602 * suck out the remaining bytes from the drive in an
603 * attempt to complete the data xfer. (see BZ#13399)
604 */
605 if (!(stat & ATA_ERR) && !uptodate && thislen) {
606 ide_pio_bytes(drive, cmd, write, thislen);
607 uptodate = cmd->nleft ? 0 : 1;
608 }
609
610 if (!uptodate)
611 rq->rq_flags |= RQF_FAILED;
612 goto out_end;
613 case REQ_OP_SCSI_IN:
614 case REQ_OP_SCSI_OUT:
615 goto out_end;
616 }
617 }
618
619 rc = ide_check_ireason(drive, rq, len, ireason, write);
620 if (rc)
621 goto out_end;
622
623 cmd->last_xfer_len = 0;
624
625 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
626 "ireason: 0x%x",
627 rq->cmd_type, ireason);
628
629 /* transfer data */
630 while (thislen > 0) {
631 int blen = min_t(int, thislen, cmd->nleft);
632
633 if (cmd->nleft == 0)
634 break;
635
636 ide_pio_bytes(drive, cmd, write, blen);
637 cmd->last_xfer_len += blen;
638
639 thislen -= blen;
640 len -= blen;
641
642 if (sense && write == 0)
643 scsi_req(rq)->sense_len += blen;
644 }
645
646 /* pad, if necessary */
647 if (len > 0) {
648 if (blk_rq_is_passthrough(rq) || write == 0)
649 ide_pad_transfer(drive, write, len);
650 else {
651 printk(KERN_ERR PFX "%s: confused, missing data\n",
652 drive->name);
653 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
654 }
655 }
656
657 switch (req_op(rq)) {
658 case REQ_OP_SCSI_IN:
659 case REQ_OP_SCSI_OUT:
660 timeout = rq->timeout;
661 break;
662 case REQ_OP_DRV_IN:
663 case REQ_OP_DRV_OUT:
664 expiry = ide_cd_expiry;
665 /*FALLTHRU*/
666 default:
667 timeout = ATAPI_WAIT_PC;
668 break;
669 }
670
671 hwif->expiry = expiry;
672 ide_set_handler(drive, cdrom_newpc_intr, timeout);
673 return ide_started;
674
675 out_end:
676 if (blk_rq_is_scsi(rq) && rc == 0) {
677 scsi_req(rq)->resid_len = 0;
678 blk_end_request_all(rq, BLK_STS_OK);
679 hwif->rq = NULL;
680 } else {
681 if (sense && uptodate)
682 ide_cd_complete_failed_rq(drive, rq);
683
684 if (!blk_rq_is_passthrough(rq)) {
685 if (cmd->nleft == 0)
686 uptodate = 1;
687 } else {
688 if (uptodate <= 0 && scsi_req(rq)->result == 0)
689 scsi_req(rq)->result = -EIO;
690 }
691
692 if (uptodate == 0 && rq->bio)
693 if (ide_cd_error_cmd(drive, cmd))
694 return ide_stopped;
695
696 /* make sure it's fully ended */
697 if (blk_rq_is_passthrough(rq)) {
698 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
699 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
700 scsi_req(rq)->resid_len += cmd->last_xfer_len;
701 }
702
703 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
704
705 if (sense && rc == 2)
706 ide_error(drive, "request sense failure", stat);
707 }
708 return ide_stopped;
709 }
710
711 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
712 {
713 struct cdrom_info *cd = drive->driver_data;
714 struct request_queue *q = drive->queue;
715 int write = rq_data_dir(rq) == WRITE;
716 unsigned short sectors_per_frame =
717 queue_logical_block_size(q) >> SECTOR_SHIFT;
718
719 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
720 "secs_per_frame: %u",
721 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
722
723 if (write) {
724 /* disk has become write protected */
725 if (get_disk_ro(cd->disk))
726 return ide_stopped;
727 } else {
728 /*
729 * We may be retrying this request after an error. Fix up any
730 * weirdness which might be present in the request packet.
731 */
732 q->prep_rq_fn(q, rq);
733 }
734
735 /* fs requests *must* be hardware frame aligned */
736 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
737 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
738 return ide_stopped;
739
740 /* use DMA, if possible */
741 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
742
743 if (write)
744 cd->devinfo.media_written = 1;
745
746 rq->timeout = ATAPI_WAIT_PC;
747
748 return ide_started;
749 }
750
751 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
752 {
753
754 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
755 rq->cmd[0], rq->cmd_type);
756
757 if (blk_rq_is_scsi(rq))
758 rq->rq_flags |= RQF_QUIET;
759 else
760 rq->rq_flags &= ~RQF_FAILED;
761
762 drive->dma = 0;
763
764 /* sg request */
765 if (rq->bio) {
766 struct request_queue *q = drive->queue;
767 char *buf = bio_data(rq->bio);
768 unsigned int alignment;
769
770 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
771
772 /*
773 * check if dma is safe
774 *
775 * NOTE! The "len" and "addr" checks should possibly have
776 * separate masks.
777 */
778 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
779 if ((unsigned long)buf & alignment
780 || blk_rq_bytes(rq) & q->dma_pad_mask
781 || object_is_on_stack(buf))
782 drive->dma = 0;
783 }
784 }
785
786 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
787 sector_t block)
788 {
789 struct ide_cmd cmd;
790 int uptodate = 0;
791 unsigned int nsectors;
792
793 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
794 rq->cmd[0], (unsigned long long)block);
795
796 if (drive->debug_mask & IDE_DBG_RQ)
797 blk_dump_rq_flags(rq, "ide_cd_do_request");
798
799 switch (req_op(rq)) {
800 default:
801 if (cdrom_start_rw(drive, rq) == ide_stopped)
802 goto out_end;
803 break;
804 case REQ_OP_SCSI_IN:
805 case REQ_OP_SCSI_OUT:
806 handle_pc:
807 if (!rq->timeout)
808 rq->timeout = ATAPI_WAIT_PC;
809 cdrom_do_block_pc(drive, rq);
810 break;
811 case REQ_OP_DRV_IN:
812 case REQ_OP_DRV_OUT:
813 switch (ide_req(rq)->type) {
814 case ATA_PRIV_MISC:
815 /* right now this can only be a reset... */
816 uptodate = 1;
817 goto out_end;
818 case ATA_PRIV_SENSE:
819 case ATA_PRIV_PC:
820 goto handle_pc;
821 default:
822 BUG();
823 }
824 }
825
826 /* prepare sense request for this command */
827 ide_prep_sense(drive, rq);
828
829 memset(&cmd, 0, sizeof(cmd));
830
831 if (rq_data_dir(rq))
832 cmd.tf_flags |= IDE_TFLAG_WRITE;
833
834 cmd.rq = rq;
835
836 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
837 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
838 ide_map_sg(drive, &cmd);
839 }
840
841 return ide_issue_pc(drive, &cmd);
842 out_end:
843 nsectors = blk_rq_sectors(rq);
844
845 if (nsectors == 0)
846 nsectors = 1;
847
848 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
849
850 return ide_stopped;
851 }
852
853 /*
854 * Ioctl handling.
855 *
856 * Routines which queue packet commands take as a final argument a pointer to a
857 * request_sense struct. If execution of the command results in an error with a
858 * CHECK CONDITION status, this structure will be filled with the results of the
859 * subsequent request sense command. The pointer can also be NULL, in which case
860 * no sense information is returned.
861 */
862 static void msf_from_bcd(struct atapi_msf *msf)
863 {
864 msf->minute = bcd2bin(msf->minute);
865 msf->second = bcd2bin(msf->second);
866 msf->frame = bcd2bin(msf->frame);
867 }
868
869 int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
870 {
871 struct cdrom_info *info = drive->driver_data;
872 struct cdrom_device_info *cdi;
873 unsigned char cmd[BLK_MAX_CDB];
874
875 ide_debug_log(IDE_DBG_FUNC, "enter");
876
877 if (!info)
878 return -EIO;
879
880 cdi = &info->devinfo;
881
882 memset(cmd, 0, BLK_MAX_CDB);
883 cmd[0] = GPCMD_TEST_UNIT_READY;
884
885 /*
886 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
887 * instead of supporting the LOAD_UNLOAD opcode.
888 */
889 cmd[7] = cdi->sanyo_slot % 3;
890
891 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
892 }
893
894 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
895 unsigned long *sectors_per_frame)
896 {
897 struct {
898 __be32 lba;
899 __be32 blocklen;
900 } capbuf;
901
902 int stat;
903 unsigned char cmd[BLK_MAX_CDB];
904 unsigned len = sizeof(capbuf);
905 u32 blocklen;
906
907 ide_debug_log(IDE_DBG_FUNC, "enter");
908
909 memset(cmd, 0, BLK_MAX_CDB);
910 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
911
912 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, NULL, 0,
913 RQF_QUIET);
914 if (stat)
915 return stat;
916
917 /*
918 * Sanity check the given block size, in so far as making
919 * sure the sectors_per_frame we give to the caller won't
920 * end up being bogus.
921 */
922 blocklen = be32_to_cpu(capbuf.blocklen);
923 blocklen = (blocklen >> SECTOR_SHIFT) << SECTOR_SHIFT;
924 switch (blocklen) {
925 case 512:
926 case 1024:
927 case 2048:
928 case 4096:
929 break;
930 default:
931 printk_once(KERN_ERR PFX "%s: weird block size %u; "
932 "setting default block size to 2048\n",
933 drive->name, blocklen);
934 blocklen = 2048;
935 break;
936 }
937
938 *capacity = 1 + be32_to_cpu(capbuf.lba);
939 *sectors_per_frame = blocklen >> SECTOR_SHIFT;
940
941 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
942 *capacity, *sectors_per_frame);
943
944 return 0;
945 }
946
947 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
948 int format, char *buf, int buflen)
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, NULL, 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)
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, NULL);
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 if (stat)
1007 toc->capacity = 0x1fffff;
1008
1009 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1010 /* save a private copy of the TOC capacity for error handling */
1011 drive->probed_capacity = toc->capacity * sectors_per_frame;
1012
1013 blk_queue_logical_block_size(drive->queue,
1014 sectors_per_frame << SECTOR_SHIFT);
1015
1016 /* first read just the header, so we know how long the TOC is */
1017 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1018 sizeof(struct atapi_toc_header));
1019 if (stat)
1020 return stat;
1021
1022 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1023 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1024 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1025 }
1026
1027 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1028 if (ntracks <= 0)
1029 return -EIO;
1030 if (ntracks > MAX_TRACKS)
1031 ntracks = MAX_TRACKS;
1032
1033 /* now read the whole schmeer */
1034 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1035 (char *)&toc->hdr,
1036 sizeof(struct atapi_toc_header) +
1037 (ntracks + 1) *
1038 sizeof(struct atapi_toc_entry));
1039
1040 if (stat && toc->hdr.first_track > 1) {
1041 /*
1042 * Cds with CDI tracks only don't have any TOC entries, despite
1043 * of this the returned values are
1044 * first_track == last_track = number of CDI tracks + 1,
1045 * so that this case is indistinguishable from the same layout
1046 * plus an additional audio track. If we get an error for the
1047 * regular case, we assume a CDI without additional audio
1048 * tracks. In this case the readable TOC is empty (CDI tracks
1049 * are not included) and only holds the Leadout entry.
1050 *
1051 * Heiko Eißfeldt.
1052 */
1053 ntracks = 0;
1054 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1055 (char *)&toc->hdr,
1056 sizeof(struct atapi_toc_header) +
1057 (ntracks + 1) *
1058 sizeof(struct atapi_toc_entry));
1059 if (stat)
1060 return stat;
1061
1062 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1063 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1064 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1065 } else {
1066 toc->hdr.first_track = CDROM_LEADOUT;
1067 toc->hdr.last_track = CDROM_LEADOUT;
1068 }
1069 }
1070
1071 if (stat)
1072 return stat;
1073
1074 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1075
1076 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1077 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1078 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1079 }
1080
1081 for (i = 0; i <= ntracks; i++) {
1082 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1083 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1084 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1085 msf_from_bcd(&toc->ent[i].addr.msf);
1086 }
1087 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1088 toc->ent[i].addr.msf.second,
1089 toc->ent[i].addr.msf.frame);
1090 }
1091
1092 if (toc->hdr.first_track != CDROM_LEADOUT) {
1093 /* read the multisession information */
1094 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1095 sizeof(ms_tmp));
1096 if (stat)
1097 return stat;
1098
1099 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1100 } else {
1101 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1102 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1103 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1104 }
1105
1106 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1107 /* re-read multisession information using MSF format */
1108 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1109 sizeof(ms_tmp));
1110 if (stat)
1111 return stat;
1112
1113 msf_from_bcd(&ms_tmp.ent.addr.msf);
1114 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1115 ms_tmp.ent.addr.msf.second,
1116 ms_tmp.ent.addr.msf.frame);
1117 }
1118
1119 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1120
1121 /* now try to get the total cdrom capacity */
1122 stat = cdrom_get_last_written(cdi, &last_written);
1123 if (!stat && (last_written > toc->capacity)) {
1124 toc->capacity = last_written;
1125 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1126 drive->probed_capacity = toc->capacity * sectors_per_frame;
1127 }
1128
1129 /* Remember that we've read this stuff. */
1130 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1131
1132 return 0;
1133 }
1134
1135 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1136 {
1137 struct cdrom_info *info = drive->driver_data;
1138 struct cdrom_device_info *cdi = &info->devinfo;
1139 struct packet_command cgc;
1140 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1141
1142 ide_debug_log(IDE_DBG_FUNC, "enter");
1143
1144 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1145 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1146
1147 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1148 do {
1149 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1150 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1151 if (!stat)
1152 break;
1153 } while (--attempts);
1154 return stat;
1155 }
1156
1157 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1158 {
1159 struct cdrom_info *cd = drive->driver_data;
1160 u16 curspeed, maxspeed;
1161
1162 ide_debug_log(IDE_DBG_FUNC, "enter");
1163
1164 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1165 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1166 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1167 } else {
1168 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1169 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1170 }
1171
1172 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1173 curspeed, maxspeed);
1174
1175 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1176 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1177 }
1178
1179 #define IDE_CD_CAPABILITIES \
1180 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1181 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1182 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1183 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1184 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1185
1186 static const struct cdrom_device_ops ide_cdrom_dops = {
1187 .open = ide_cdrom_open_real,
1188 .release = ide_cdrom_release_real,
1189 .drive_status = ide_cdrom_drive_status,
1190 .check_events = ide_cdrom_check_events_real,
1191 .tray_move = ide_cdrom_tray_move,
1192 .lock_door = ide_cdrom_lock_door,
1193 .select_speed = ide_cdrom_select_speed,
1194 .get_last_session = ide_cdrom_get_last_session,
1195 .get_mcn = ide_cdrom_get_mcn,
1196 .reset = ide_cdrom_reset,
1197 .audio_ioctl = ide_cdrom_audio_ioctl,
1198 .capability = IDE_CD_CAPABILITIES,
1199 .generic_packet = ide_cdrom_packet,
1200 };
1201
1202 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1203 {
1204 struct cdrom_info *info = drive->driver_data;
1205 struct cdrom_device_info *devinfo = &info->devinfo;
1206
1207 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1208
1209 devinfo->ops = &ide_cdrom_dops;
1210 devinfo->speed = info->current_speed;
1211 devinfo->capacity = nslots;
1212 devinfo->handle = drive;
1213 strcpy(devinfo->name, drive->name);
1214
1215 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1216 devinfo->mask |= CDC_SELECT_SPEED;
1217
1218 devinfo->disk = info->disk;
1219 return register_cdrom(devinfo);
1220 }
1221
1222 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1223 {
1224 struct cdrom_info *cd = drive->driver_data;
1225 struct cdrom_device_info *cdi = &cd->devinfo;
1226 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1227 mechtype_t mechtype;
1228 int nslots = 1;
1229
1230 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1231 drive->media, drive->atapi_flags);
1232
1233 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1234 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1235 CDC_MO_DRIVE | CDC_RAM);
1236
1237 if (drive->media == ide_optical) {
1238 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1239 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1240 drive->name);
1241 return nslots;
1242 }
1243
1244 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1245 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1246 cdi->mask &= ~CDC_PLAY_AUDIO;
1247 return nslots;
1248 }
1249
1250 /*
1251 * We have to cheat a little here. the packet will eventually be queued
1252 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1253 * Since this device hasn't been registered with the Uniform layer yet,
1254 * it can't do this. Same goes for cdi->ops.
1255 */
1256 cdi->handle = drive;
1257 cdi->ops = &ide_cdrom_dops;
1258
1259 if (ide_cdrom_get_capabilities(drive, buf))
1260 return 0;
1261
1262 if ((buf[8 + 6] & 0x01) == 0)
1263 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1264 if (buf[8 + 6] & 0x08)
1265 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1266 if (buf[8 + 3] & 0x01)
1267 cdi->mask &= ~CDC_CD_R;
1268 if (buf[8 + 3] & 0x02)
1269 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1270 if (buf[8 + 2] & 0x38)
1271 cdi->mask &= ~CDC_DVD;
1272 if (buf[8 + 3] & 0x20)
1273 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1274 if (buf[8 + 3] & 0x10)
1275 cdi->mask &= ~CDC_DVD_R;
1276 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1277 cdi->mask &= ~CDC_PLAY_AUDIO;
1278
1279 mechtype = buf[8 + 6] >> 5;
1280 if (mechtype == mechtype_caddy ||
1281 mechtype == mechtype_popup ||
1282 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1283 cdi->mask |= CDC_CLOSE_TRAY;
1284
1285 if (cdi->sanyo_slot > 0) {
1286 cdi->mask &= ~CDC_SELECT_DISC;
1287 nslots = 3;
1288 } else if (mechtype == mechtype_individual_changer ||
1289 mechtype == mechtype_cartridge_changer) {
1290 nslots = cdrom_number_of_slots(cdi);
1291 if (nslots > 1)
1292 cdi->mask &= ~CDC_SELECT_DISC;
1293 }
1294
1295 ide_cdrom_update_speed(drive, buf);
1296
1297 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1298
1299 /* don't print speed if the drive reported 0 */
1300 if (cd->max_speed)
1301 printk(KERN_CONT " %dX", cd->max_speed);
1302
1303 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1304
1305 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1306 printk(KERN_CONT " DVD%s%s",
1307 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1308 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1309
1310 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1311 printk(KERN_CONT " CD%s%s",
1312 (cdi->mask & CDC_CD_R) ? "" : "-R",
1313 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1314
1315 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1316 printk(KERN_CONT " changer w/%d slots", nslots);
1317 else
1318 printk(KERN_CONT " drive");
1319
1320 printk(KERN_CONT ", %dkB Cache\n",
1321 be16_to_cpup((__be16 *)&buf[8 + 12]));
1322
1323 return nslots;
1324 }
1325
1326 /* standard prep_rq_fn that builds 10 byte cmds */
1327 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1328 {
1329 int hard_sect = queue_logical_block_size(q);
1330 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1331 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1332 struct scsi_request *req = scsi_req(rq);
1333
1334 q->initialize_rq_fn(rq);
1335
1336 if (rq_data_dir(rq) == READ)
1337 req->cmd[0] = GPCMD_READ_10;
1338 else
1339 req->cmd[0] = GPCMD_WRITE_10;
1340
1341 /*
1342 * fill in lba
1343 */
1344 req->cmd[2] = (block >> 24) & 0xff;
1345 req->cmd[3] = (block >> 16) & 0xff;
1346 req->cmd[4] = (block >> 8) & 0xff;
1347 req->cmd[5] = block & 0xff;
1348
1349 /*
1350 * and transfer length
1351 */
1352 req->cmd[7] = (blocks >> 8) & 0xff;
1353 req->cmd[8] = blocks & 0xff;
1354 req->cmd_len = 10;
1355 return BLKPREP_OK;
1356 }
1357
1358 /*
1359 * Most of the SCSI commands are supported directly by ATAPI devices.
1360 * This transform handles the few exceptions.
1361 */
1362 static int ide_cdrom_prep_pc(struct request *rq)
1363 {
1364 u8 *c = scsi_req(rq)->cmd;
1365
1366 /* transform 6-byte read/write commands to the 10-byte version */
1367 if (c[0] == READ_6 || c[0] == WRITE_6) {
1368 c[8] = c[4];
1369 c[5] = c[3];
1370 c[4] = c[2];
1371 c[3] = c[1] & 0x1f;
1372 c[2] = 0;
1373 c[1] &= 0xe0;
1374 c[0] += (READ_10 - READ_6);
1375 scsi_req(rq)->cmd_len = 10;
1376 return BLKPREP_OK;
1377 }
1378
1379 /*
1380 * it's silly to pretend we understand 6-byte sense commands, just
1381 * reject with ILLEGAL_REQUEST and the caller should take the
1382 * appropriate action
1383 */
1384 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1385 scsi_req(rq)->result = ILLEGAL_REQUEST;
1386 return BLKPREP_KILL;
1387 }
1388
1389 return BLKPREP_OK;
1390 }
1391
1392 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1393 {
1394 if (!blk_rq_is_passthrough(rq))
1395 return ide_cdrom_prep_fs(q, rq);
1396 else if (blk_rq_is_scsi(rq))
1397 return ide_cdrom_prep_pc(rq);
1398
1399 return 0;
1400 }
1401
1402 struct cd_list_entry {
1403 const char *id_model;
1404 const char *id_firmware;
1405 unsigned int cd_flags;
1406 };
1407
1408 #ifdef CONFIG_IDE_PROC_FS
1409 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1410 {
1411 unsigned long capacity, sectors_per_frame;
1412
1413 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame))
1414 return 0;
1415
1416 return capacity * sectors_per_frame;
1417 }
1418
1419 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1420 {
1421 ide_drive_t *drive = m->private;
1422
1423 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1424 return 0;
1425 }
1426
1427 static ide_proc_entry_t idecd_proc[] = {
1428 { "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
1429 {}
1430 };
1431
1432 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1433 {
1434 return idecd_proc;
1435 }
1436
1437 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1438 {
1439 return NULL;
1440 }
1441 #endif
1442
1443 static const struct cd_list_entry ide_cd_quirks_list[] = {
1444 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1445 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1446 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1447 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1448 IDE_AFLAG_PRE_ATAPI12, },
1449 /* Vertos 300, some versions of this drive like to talk BCD. */
1450 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1451 /* Vertos 600 ESD. */
1452 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1453 /*
1454 * Sanyo 3 CD changer uses a non-standard command for CD changing
1455 * (by default standard ATAPI support for CD changers is used).
1456 */
1457 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1458 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1459 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1460 /* Stingray 8X CD-ROM. */
1461 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1462 /*
1463 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1464 * mode sense page capabilities size, but older drives break.
1465 */
1466 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1467 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1468 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1469 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1470 /*
1471 * Some drives used by Apple don't advertise audio play
1472 * but they do support reading TOC & audio datas.
1473 */
1474 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1475 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1476 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1477 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1478 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1479 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1480 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1481 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1482 { NULL, NULL, 0 }
1483 };
1484
1485 static unsigned int ide_cd_flags(u16 *id)
1486 {
1487 const struct cd_list_entry *cle = ide_cd_quirks_list;
1488
1489 while (cle->id_model) {
1490 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1491 (cle->id_firmware == NULL ||
1492 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1493 return cle->cd_flags;
1494 cle++;
1495 }
1496
1497 return 0;
1498 }
1499
1500 static int ide_cdrom_setup(ide_drive_t *drive)
1501 {
1502 struct cdrom_info *cd = drive->driver_data;
1503 struct cdrom_device_info *cdi = &cd->devinfo;
1504 struct request_queue *q = drive->queue;
1505 u16 *id = drive->id;
1506 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1507 int nslots;
1508
1509 ide_debug_log(IDE_DBG_PROBE, "enter");
1510
1511 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1512 blk_queue_dma_alignment(q, 31);
1513 blk_queue_update_dma_pad(q, 15);
1514
1515 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1516 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1517
1518 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1519 fw_rev[4] == '1' && fw_rev[6] <= '2')
1520 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1521 IDE_AFLAG_TOCADDR_AS_BCD);
1522 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1523 fw_rev[4] == '1' && fw_rev[6] <= '2')
1524 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1525 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1526 /* 3 => use CD in slot 0 */
1527 cdi->sanyo_slot = 3;
1528
1529 nslots = ide_cdrom_probe_capabilities(drive);
1530
1531 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1532
1533 if (ide_cdrom_register(drive, nslots)) {
1534 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1535 " cdrom driver.\n", drive->name, __func__);
1536 cd->devinfo.handle = NULL;
1537 return 1;
1538 }
1539
1540 ide_proc_register_driver(drive, cd->driver);
1541 return 0;
1542 }
1543
1544 static void ide_cd_remove(ide_drive_t *drive)
1545 {
1546 struct cdrom_info *info = drive->driver_data;
1547
1548 ide_debug_log(IDE_DBG_FUNC, "enter");
1549
1550 ide_proc_unregister_driver(drive, info->driver);
1551 device_del(&info->dev);
1552 del_gendisk(info->disk);
1553
1554 mutex_lock(&idecd_ref_mutex);
1555 put_device(&info->dev);
1556 mutex_unlock(&idecd_ref_mutex);
1557 }
1558
1559 static void ide_cd_release(struct device *dev)
1560 {
1561 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1562 struct cdrom_device_info *devinfo = &info->devinfo;
1563 ide_drive_t *drive = info->drive;
1564 struct gendisk *g = info->disk;
1565
1566 ide_debug_log(IDE_DBG_FUNC, "enter");
1567
1568 kfree(info->toc);
1569 if (devinfo->handle == drive)
1570 unregister_cdrom(devinfo);
1571 drive->driver_data = NULL;
1572 blk_queue_prep_rq(drive->queue, NULL);
1573 g->private_data = NULL;
1574 put_disk(g);
1575 kfree(info);
1576 }
1577
1578 static int ide_cd_probe(ide_drive_t *);
1579
1580 static struct ide_driver ide_cdrom_driver = {
1581 .gen_driver = {
1582 .owner = THIS_MODULE,
1583 .name = "ide-cdrom",
1584 .bus = &ide_bus_type,
1585 },
1586 .probe = ide_cd_probe,
1587 .remove = ide_cd_remove,
1588 .version = IDECD_VERSION,
1589 .do_request = ide_cd_do_request,
1590 #ifdef CONFIG_IDE_PROC_FS
1591 .proc_entries = ide_cd_proc_entries,
1592 .proc_devsets = ide_cd_proc_devsets,
1593 #endif
1594 };
1595
1596 static int idecd_open(struct block_device *bdev, fmode_t mode)
1597 {
1598 struct cdrom_info *info;
1599 int rc = -ENXIO;
1600
1601 check_disk_change(bdev);
1602
1603 mutex_lock(&ide_cd_mutex);
1604 info = ide_cd_get(bdev->bd_disk);
1605 if (!info)
1606 goto out;
1607
1608 rc = cdrom_open(&info->devinfo, bdev, mode);
1609 if (rc < 0)
1610 ide_cd_put(info);
1611 out:
1612 mutex_unlock(&ide_cd_mutex);
1613 return rc;
1614 }
1615
1616 static void idecd_release(struct gendisk *disk, fmode_t mode)
1617 {
1618 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1619
1620 mutex_lock(&ide_cd_mutex);
1621 cdrom_release(&info->devinfo, mode);
1622
1623 ide_cd_put(info);
1624 mutex_unlock(&ide_cd_mutex);
1625 }
1626
1627 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1628 {
1629 struct packet_command cgc;
1630 char buffer[16];
1631 int stat;
1632 char spindown;
1633
1634 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1635 return -EFAULT;
1636
1637 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1638
1639 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1640 if (stat)
1641 return stat;
1642
1643 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1644 return cdrom_mode_select(cdi, &cgc);
1645 }
1646
1647 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1648 {
1649 struct packet_command cgc;
1650 char buffer[16];
1651 int stat;
1652 char spindown;
1653
1654 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1655
1656 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1657 if (stat)
1658 return stat;
1659
1660 spindown = buffer[11] & 0x0f;
1661 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1662 return -EFAULT;
1663 return 0;
1664 }
1665
1666 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1667 unsigned int cmd, unsigned long arg)
1668 {
1669 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1670 int err;
1671
1672 switch (cmd) {
1673 case CDROMSETSPINDOWN:
1674 return idecd_set_spindown(&info->devinfo, arg);
1675 case CDROMGETSPINDOWN:
1676 return idecd_get_spindown(&info->devinfo, arg);
1677 default:
1678 break;
1679 }
1680
1681 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1682 if (err == -EINVAL)
1683 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1684
1685 return err;
1686 }
1687
1688 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1689 unsigned int cmd, unsigned long arg)
1690 {
1691 int ret;
1692
1693 mutex_lock(&ide_cd_mutex);
1694 ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1695 mutex_unlock(&ide_cd_mutex);
1696
1697 return ret;
1698 }
1699
1700
1701 static unsigned int idecd_check_events(struct gendisk *disk,
1702 unsigned int clearing)
1703 {
1704 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1705 return cdrom_check_events(&info->devinfo, clearing);
1706 }
1707
1708 static int idecd_revalidate_disk(struct gendisk *disk)
1709 {
1710 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1711
1712 ide_cd_read_toc(info->drive);
1713
1714 return 0;
1715 }
1716
1717 static const struct block_device_operations idecd_ops = {
1718 .owner = THIS_MODULE,
1719 .open = idecd_open,
1720 .release = idecd_release,
1721 .ioctl = idecd_ioctl,
1722 .check_events = idecd_check_events,
1723 .revalidate_disk = idecd_revalidate_disk
1724 };
1725
1726 /* module options */
1727 static unsigned long debug_mask;
1728 module_param(debug_mask, ulong, 0644);
1729
1730 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1731
1732 static int ide_cd_probe(ide_drive_t *drive)
1733 {
1734 struct cdrom_info *info;
1735 struct gendisk *g;
1736
1737 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1738 drive->driver_req, drive->media);
1739
1740 if (!strstr("ide-cdrom", drive->driver_req))
1741 goto failed;
1742
1743 if (drive->media != ide_cdrom && drive->media != ide_optical)
1744 goto failed;
1745
1746 drive->debug_mask = debug_mask;
1747 drive->irq_handler = cdrom_newpc_intr;
1748
1749 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1750 if (info == NULL) {
1751 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1752 drive->name);
1753 goto failed;
1754 }
1755
1756 g = alloc_disk(1 << PARTN_BITS);
1757 if (!g)
1758 goto out_free_cd;
1759
1760 ide_init_disk(g, drive);
1761
1762 info->dev.parent = &drive->gendev;
1763 info->dev.release = ide_cd_release;
1764 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1765
1766 if (device_register(&info->dev))
1767 goto out_free_disk;
1768
1769 info->drive = drive;
1770 info->driver = &ide_cdrom_driver;
1771 info->disk = g;
1772
1773 g->private_data = &info->driver;
1774
1775 drive->driver_data = info;
1776
1777 g->minors = 1;
1778 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1779 if (ide_cdrom_setup(drive)) {
1780 put_device(&info->dev);
1781 goto failed;
1782 }
1783
1784 ide_cd_read_toc(drive);
1785 g->fops = &idecd_ops;
1786 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1787 device_add_disk(&drive->gendev, g);
1788 return 0;
1789
1790 out_free_disk:
1791 put_disk(g);
1792 out_free_cd:
1793 kfree(info);
1794 failed:
1795 return -ENODEV;
1796 }
1797
1798 static void __exit ide_cdrom_exit(void)
1799 {
1800 driver_unregister(&ide_cdrom_driver.gen_driver);
1801 }
1802
1803 static int __init ide_cdrom_init(void)
1804 {
1805 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1806 return driver_register(&ide_cdrom_driver.gen_driver);
1807 }
1808
1809 MODULE_ALIAS("ide:*m-cdrom*");
1810 MODULE_ALIAS("ide-cd");
1811 module_init(ide_cdrom_init);
1812 module_exit(ide_cdrom_exit);
1813 MODULE_LICENSE("GPL");
Linux with added FPC-III support