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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.rst 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/compat.h>
29#include <linux/module.h>
30#include <linux/types.h>
31#include <linux/kernel.h>
32#include <linux/sched/task_stack.h>
33#include <linux/delay.h>
34#include <linux/timer.h>
35#include <linux/seq_file.h>
36#include <linux/slab.h>
37#include <linux/interrupt.h>
38#include <linux/errno.h>
39#include <linux/cdrom.h>
40#include <linux/ide.h>
41#include <linux/completion.h>
42#include <linux/mutex.h>
43#include <linux/bcd.h>
44
45/* For SCSI -> ATAPI command conversion */
46#include <scsi/scsi.h>
47
48#include <linux/io.h>
49#include <asm/byteorder.h>
50#include <linux/uaccess.h>
51#include <asm/unaligned.h>
52
53#include "ide-cd.h"
54
55static DEFINE_MUTEX(ide_cd_mutex);
56static DEFINE_MUTEX(idecd_ref_mutex);
57
58static void ide_cd_release(struct device *);
59
60static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61{
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 get_device(&cd->dev);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75}
76
77static void ide_cd_put(struct cdrom_info *cd)
78{
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 put_device(&cd->dev);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85}
86
87/*
88 * Generic packet command support and error handling routines.
89 */
90
91/* Mark that we've seen a media change and invalidate our internal buffers. */
92static void cdrom_saw_media_change(ide_drive_t *drive)
93{
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96}
97
98static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
99{
100 struct request_sense *sense = &drive->sense_data;
101 int log = 0;
102
103 if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
104 return 0;
105
106 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
107
108 switch (sense->sense_key) {
109 case NO_SENSE:
110 case RECOVERED_ERROR:
111 break;
112 case NOT_READY:
113 /*
114 * don't care about tray state messages for e.g. capacity
115 * commands or in-progress or becoming ready
116 */
117 if (sense->asc == 0x3a || sense->asc == 0x04)
118 break;
119 log = 1;
120 break;
121 case ILLEGAL_REQUEST:
122 /*
123 * don't log START_STOP unit with LoEj set, since we cannot
124 * reliably check if drive can auto-close
125 */
126 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
127 break;
128 log = 1;
129 break;
130 case UNIT_ATTENTION:
131 /*
132 * Make good and sure we've seen this potential media change.
133 * Some drives (i.e. Creative) fail to present the correct sense
134 * key in the error register.
135 */
136 cdrom_saw_media_change(drive);
137 break;
138 default:
139 log = 1;
140 break;
141 }
142 return log;
143}
144
145static void cdrom_analyze_sense_data(ide_drive_t *drive,
146 struct request *failed_command)
147{
148 struct request_sense *sense = &drive->sense_data;
149 struct cdrom_info *info = drive->driver_data;
150 unsigned long sector;
151 unsigned long bio_sectors;
152
153 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
154 sense->error_code, sense->sense_key);
155
156 if (failed_command)
157 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
158 failed_command->cmd[0]);
159
160 if (!cdrom_log_sense(drive, failed_command))
161 return;
162
163 /*
164 * If a read toc is executed for a CD-R or CD-RW medium where the first
165 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
166 * confusing error)
167 */
168 if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
169 if (sense->sense_key == 0x05 && sense->asc == 0x24)
170 return;
171
172 /* current error */
173 if (sense->error_code == 0x70) {
174 switch (sense->sense_key) {
175 case MEDIUM_ERROR:
176 case VOLUME_OVERFLOW:
177 case ILLEGAL_REQUEST:
178 if (!sense->valid)
179 break;
180 if (failed_command == NULL ||
181 blk_rq_is_passthrough(failed_command))
182 break;
183 sector = (sense->information[0] << 24) |
184 (sense->information[1] << 16) |
185 (sense->information[2] << 8) |
186 (sense->information[3]);
187
188 if (queue_logical_block_size(drive->queue) == 2048)
189 /* device sector size is 2K */
190 sector <<= 2;
191
192 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
193 sector &= ~(bio_sectors - 1);
194
195 /*
196 * The SCSI specification allows for the value
197 * returned by READ CAPACITY to be up to 75 2K
198 * sectors past the last readable block.
199 * Therefore, if we hit a medium error within the
200 * last 75 2K sectors, we decrease the saved size
201 * value.
202 */
203 if (sector < get_capacity(info->disk) &&
204 drive->probed_capacity - sector < 4 * 75)
205 set_capacity(info->disk, sector);
206 }
207 }
208
209 ide_cd_log_error(drive->name, failed_command, sense);
210}
211
212static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
213{
214 /*
215 * For ATA_PRIV_SENSE, "ide_req(rq)->special" points to the original
216 * failed request. Also, the sense data should be read
217 * directly from rq which might be different from the original
218 * sense buffer if it got copied during mapping.
219 */
220 struct request *failed = ide_req(rq)->special;
221 void *sense = bio_data(rq->bio);
222
223 if (failed) {
224 /*
225 * Sense is always read into drive->sense_data, copy back to the
226 * original request.
227 */
228 memcpy(scsi_req(failed)->sense, sense, 18);
229 scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
230 cdrom_analyze_sense_data(drive, failed);
231
232 if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
233 BUG();
234 } else
235 cdrom_analyze_sense_data(drive, NULL);
236}
237
238
239/*
240 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
241 * while flushing data from cache.
242 *
243 * returns: 0 failed (write timeout expired)
244 * 1 success
245 */
246static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
247{
248
249 struct cdrom_info *info = drive->driver_data;
250
251 if (!scsi_req(rq)->result)
252 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
253
254 scsi_req(rq)->result = 1;
255
256 if (time_after(jiffies, info->write_timeout))
257 return 0;
258 else {
259 /*
260 * take a breather
261 */
262 blk_mq_requeue_request(rq, false);
263 blk_mq_delay_kick_requeue_list(drive->queue, 1);
264 return 1;
265 }
266}
267
268static void ide_cd_free_sense(ide_drive_t *drive)
269{
270 if (!drive->sense_rq)
271 return;
272
273 blk_mq_free_request(drive->sense_rq);
274 drive->sense_rq = NULL;
275 drive->sense_rq_armed = false;
276}
277
278/**
279 * Returns:
280 * 0: if the request should be continued.
281 * 1: if the request will be going through error recovery.
282 * 2: if the request should be ended.
283 */
284static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
285{
286 ide_hwif_t *hwif = drive->hwif;
287 struct request *rq = hwif->rq;
288 int err, sense_key, do_end_request = 0;
289
290 /* get the IDE error register */
291 err = ide_read_error(drive);
292 sense_key = err >> 4;
293
294 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
295 "stat 0x%x",
296 rq->cmd[0], rq->cmd_type, err, stat);
297
298 if (ata_sense_request(rq)) {
299 /*
300 * We got an error trying to get sense info from the drive
301 * (probably while trying to recover from a former error).
302 * Just give up.
303 */
304 rq->rq_flags |= RQF_FAILED;
305 return 2;
306 }
307
308 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
309 if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
310 scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
311
312 if (blk_noretry_request(rq))
313 do_end_request = 1;
314
315 switch (sense_key) {
316 case NOT_READY:
317 if (req_op(rq) == REQ_OP_WRITE) {
318 if (ide_cd_breathe(drive, rq))
319 return 1;
320 } else {
321 cdrom_saw_media_change(drive);
322
323 if (!blk_rq_is_passthrough(rq) &&
324 !(rq->rq_flags & RQF_QUIET))
325 printk(KERN_ERR PFX "%s: tray open\n",
326 drive->name);
327 }
328 do_end_request = 1;
329 break;
330 case UNIT_ATTENTION:
331 cdrom_saw_media_change(drive);
332
333 if (blk_rq_is_passthrough(rq))
334 return 0;
335
336 /*
337 * Arrange to retry the request but be sure to give up if we've
338 * retried too many times.
339 */
340 if (++scsi_req(rq)->result > ERROR_MAX)
341 do_end_request = 1;
342 break;
343 case ILLEGAL_REQUEST:
344 /*
345 * Don't print error message for this condition -- SFF8090i
346 * indicates that 5/24/00 is the correct response to a request
347 * to close the tray if the drive doesn't have that capability.
348 *
349 * cdrom_log_sense() knows this!
350 */
351 if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
352 break;
353 fallthrough;
354 case DATA_PROTECT:
355 /*
356 * No point in retrying after an illegal request or data
357 * protect error.
358 */
359 if (!(rq->rq_flags & RQF_QUIET))
360 ide_dump_status(drive, "command error", stat);
361 do_end_request = 1;
362 break;
363 case MEDIUM_ERROR:
364 /*
365 * No point in re-trying a zillion times on a bad sector.
366 * If we got here the error is not correctable.
367 */
368 if (!(rq->rq_flags & RQF_QUIET))
369 ide_dump_status(drive, "media error "
370 "(bad sector)", stat);
371 do_end_request = 1;
372 break;
373 case BLANK_CHECK:
374 /* disk appears blank? */
375 if (!(rq->rq_flags & RQF_QUIET))
376 ide_dump_status(drive, "media error (blank)",
377 stat);
378 do_end_request = 1;
379 break;
380 default:
381 if (blk_rq_is_passthrough(rq))
382 break;
383 if (err & ~ATA_ABORTED) {
384 /* go to the default handler for other errors */
385 ide_error(drive, "cdrom_decode_status", stat);
386 return 1;
387 } else if (++scsi_req(rq)->result > ERROR_MAX)
388 /* we've racked up too many retries, abort */
389 do_end_request = 1;
390 }
391
392 if (blk_rq_is_passthrough(rq)) {
393 rq->rq_flags |= RQF_FAILED;
394 do_end_request = 1;
395 }
396
397 /*
398 * End a request through request sense analysis when we have sense data.
399 * We need this in order to perform end of media processing.
400 */
401 if (do_end_request)
402 goto end_request;
403
404 /* if we got a CHECK_CONDITION status, queue a request sense command */
405 if (stat & ATA_ERR)
406 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
407 return 1;
408
409end_request:
410 if (stat & ATA_ERR) {
411 hwif->rq = NULL;
412 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
413 } else
414 return 2;
415}
416
417static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
418{
419 struct request *rq = cmd->rq;
420
421 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
422
423 /*
424 * Some of the trailing request sense fields are optional,
425 * and some drives don't send them. Sigh.
426 */
427 if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
428 cmd->nleft > 0 && cmd->nleft <= 5)
429 cmd->nleft = 0;
430}
431
432int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
433 int write, void *buffer, unsigned *bufflen,
434 struct scsi_sense_hdr *sshdr, int timeout,
435 req_flags_t rq_flags)
436{
437 struct cdrom_info *info = drive->driver_data;
438 struct scsi_sense_hdr local_sshdr;
439 int retries = 10;
440 bool failed;
441
442 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
443 "rq_flags: 0x%x",
444 cmd[0], write, timeout, rq_flags);
445
446 if (!sshdr)
447 sshdr = &local_sshdr;
448
449 /* start of retry loop */
450 do {
451 struct request *rq;
452 int error;
453 bool delay = false;
454
455 rq = blk_get_request(drive->queue,
456 write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
457 memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
458 ide_req(rq)->type = ATA_PRIV_PC;
459 rq->rq_flags |= rq_flags;
460 rq->timeout = timeout;
461 if (buffer) {
462 error = blk_rq_map_kern(drive->queue, rq, buffer,
463 *bufflen, GFP_NOIO);
464 if (error) {
465 blk_put_request(rq);
466 return error;
467 }
468 }
469
470 blk_execute_rq(drive->queue, info->disk, rq, 0);
471 error = scsi_req(rq)->result ? -EIO : 0;
472
473 if (buffer)
474 *bufflen = scsi_req(rq)->resid_len;
475 scsi_normalize_sense(scsi_req(rq)->sense,
476 scsi_req(rq)->sense_len, sshdr);
477
478 /*
479 * FIXME: we should probably abort/retry or something in case of
480 * failure.
481 */
482 failed = (rq->rq_flags & RQF_FAILED) != 0;
483 if (failed) {
484 /*
485 * The request failed. Retry if it was due to a unit
486 * attention status (usually means media was changed).
487 */
488 if (sshdr->sense_key == UNIT_ATTENTION)
489 cdrom_saw_media_change(drive);
490 else if (sshdr->sense_key == NOT_READY &&
491 sshdr->asc == 4 && sshdr->ascq != 4) {
492 /*
493 * The drive is in the process of loading
494 * a disk. Retry, but wait a little to give
495 * the drive time to complete the load.
496 */
497 delay = true;
498 } else {
499 /* otherwise, don't retry */
500 retries = 0;
501 }
502 --retries;
503 }
504 blk_put_request(rq);
505 if (delay)
506 ssleep(2);
507 } while (failed && retries >= 0);
508
509 /* return an error if the command failed */
510 return failed ? -EIO : 0;
511}
512
513/*
514 * returns true if rq has been completed
515 */
516static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
517{
518 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
519
520 if (cmd->tf_flags & IDE_TFLAG_WRITE)
521 nr_bytes -= cmd->last_xfer_len;
522
523 if (nr_bytes > 0) {
524 ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
525 return true;
526 }
527
528 return false;
529}
530
531/* standard prep_rq that builds 10 byte cmds */
532static bool ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
533{
534 int hard_sect = queue_logical_block_size(q);
535 long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
536 unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
537 struct scsi_request *req = scsi_req(rq);
538
539 if (rq_data_dir(rq) == READ)
540 req->cmd[0] = GPCMD_READ_10;
541 else
542 req->cmd[0] = GPCMD_WRITE_10;
543
544 /*
545 * fill in lba
546 */
547 req->cmd[2] = (block >> 24) & 0xff;
548 req->cmd[3] = (block >> 16) & 0xff;
549 req->cmd[4] = (block >> 8) & 0xff;
550 req->cmd[5] = block & 0xff;
551
552 /*
553 * and transfer length
554 */
555 req->cmd[7] = (blocks >> 8) & 0xff;
556 req->cmd[8] = blocks & 0xff;
557 req->cmd_len = 10;
558 return true;
559}
560
561/*
562 * Most of the SCSI commands are supported directly by ATAPI devices.
563 * This transform handles the few exceptions.
564 */
565static bool ide_cdrom_prep_pc(struct request *rq)
566{
567 u8 *c = scsi_req(rq)->cmd;
568
569 /* transform 6-byte read/write commands to the 10-byte version */
570 if (c[0] == READ_6 || c[0] == WRITE_6) {
571 c[8] = c[4];
572 c[5] = c[3];
573 c[4] = c[2];
574 c[3] = c[1] & 0x1f;
575 c[2] = 0;
576 c[1] &= 0xe0;
577 c[0] += (READ_10 - READ_6);
578 scsi_req(rq)->cmd_len = 10;
579 return true;
580 }
581
582 /*
583 * it's silly to pretend we understand 6-byte sense commands, just
584 * reject with ILLEGAL_REQUEST and the caller should take the
585 * appropriate action
586 */
587 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
588 scsi_req(rq)->result = ILLEGAL_REQUEST;
589 return false;
590 }
591
592 return true;
593}
594
595static bool ide_cdrom_prep_rq(ide_drive_t *drive, struct request *rq)
596{
597 if (!blk_rq_is_passthrough(rq)) {
598 scsi_req_init(scsi_req(rq));
599
600 return ide_cdrom_prep_fs(drive->queue, rq);
601 } else if (blk_rq_is_scsi(rq))
602 return ide_cdrom_prep_pc(rq);
603
604 return true;
605}
606
607static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
608{
609 ide_hwif_t *hwif = drive->hwif;
610 struct ide_cmd *cmd = &hwif->cmd;
611 struct request *rq = hwif->rq;
612 ide_expiry_t *expiry = NULL;
613 int dma_error = 0, dma, thislen, uptodate = 0;
614 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
615 int sense = ata_sense_request(rq);
616 unsigned int timeout;
617 u16 len;
618 u8 ireason, stat;
619
620 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
621
622 /* check for errors */
623 dma = drive->dma;
624 if (dma) {
625 drive->dma = 0;
626 drive->waiting_for_dma = 0;
627 dma_error = hwif->dma_ops->dma_end(drive);
628 ide_dma_unmap_sg(drive, cmd);
629 if (dma_error) {
630 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
631 write ? "write" : "read");
632 ide_dma_off(drive);
633 }
634 }
635
636 /* check status */
637 stat = hwif->tp_ops->read_status(hwif);
638
639 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
640 rc = cdrom_decode_status(drive, stat);
641 if (rc) {
642 if (rc == 2)
643 goto out_end;
644 return ide_stopped;
645 }
646 }
647
648 /* using dma, transfer is complete now */
649 if (dma) {
650 if (dma_error)
651 return ide_error(drive, "dma error", stat);
652 uptodate = 1;
653 goto out_end;
654 }
655
656 ide_read_bcount_and_ireason(drive, &len, &ireason);
657
658 thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
659 if (thislen > len)
660 thislen = len;
661
662 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
663 stat, thislen);
664
665 /* If DRQ is clear, the command has completed. */
666 if ((stat & ATA_DRQ) == 0) {
667 switch (req_op(rq)) {
668 default:
669 /*
670 * If we're not done reading/writing, complain.
671 * Otherwise, complete the command normally.
672 */
673 uptodate = 1;
674 if (cmd->nleft > 0) {
675 printk(KERN_ERR PFX "%s: %s: data underrun "
676 "(%u bytes)\n", drive->name, __func__,
677 cmd->nleft);
678 if (!write)
679 rq->rq_flags |= RQF_FAILED;
680 uptodate = 0;
681 }
682 goto out_end;
683 case REQ_OP_DRV_IN:
684 case REQ_OP_DRV_OUT:
685 ide_cd_request_sense_fixup(drive, cmd);
686
687 uptodate = cmd->nleft ? 0 : 1;
688
689 /*
690 * suck out the remaining bytes from the drive in an
691 * attempt to complete the data xfer. (see BZ#13399)
692 */
693 if (!(stat & ATA_ERR) && !uptodate && thislen) {
694 ide_pio_bytes(drive, cmd, write, thislen);
695 uptodate = cmd->nleft ? 0 : 1;
696 }
697
698 if (!uptodate)
699 rq->rq_flags |= RQF_FAILED;
700 goto out_end;
701 case REQ_OP_SCSI_IN:
702 case REQ_OP_SCSI_OUT:
703 goto out_end;
704 }
705 }
706
707 rc = ide_check_ireason(drive, rq, len, ireason, write);
708 if (rc)
709 goto out_end;
710
711 cmd->last_xfer_len = 0;
712
713 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
714 "ireason: 0x%x",
715 rq->cmd_type, ireason);
716
717 /* transfer data */
718 while (thislen > 0) {
719 int blen = min_t(int, thislen, cmd->nleft);
720
721 if (cmd->nleft == 0)
722 break;
723
724 ide_pio_bytes(drive, cmd, write, blen);
725 cmd->last_xfer_len += blen;
726
727 thislen -= blen;
728 len -= blen;
729
730 if (sense && write == 0)
731 scsi_req(rq)->sense_len += blen;
732 }
733
734 /* pad, if necessary */
735 if (len > 0) {
736 if (blk_rq_is_passthrough(rq) || write == 0)
737 ide_pad_transfer(drive, write, len);
738 else {
739 printk(KERN_ERR PFX "%s: confused, missing data\n",
740 drive->name);
741 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
742 }
743 }
744
745 switch (req_op(rq)) {
746 case REQ_OP_SCSI_IN:
747 case REQ_OP_SCSI_OUT:
748 timeout = rq->timeout;
749 break;
750 case REQ_OP_DRV_IN:
751 case REQ_OP_DRV_OUT:
752 expiry = ide_cd_expiry;
753 fallthrough;
754 default:
755 timeout = ATAPI_WAIT_PC;
756 break;
757 }
758
759 hwif->expiry = expiry;
760 ide_set_handler(drive, cdrom_newpc_intr, timeout);
761 return ide_started;
762
763out_end:
764 if (blk_rq_is_scsi(rq) && rc == 0) {
765 scsi_req(rq)->resid_len = 0;
766 blk_mq_end_request(rq, BLK_STS_OK);
767 hwif->rq = NULL;
768 } else {
769 if (sense && uptodate)
770 ide_cd_complete_failed_rq(drive, rq);
771
772 if (!blk_rq_is_passthrough(rq)) {
773 if (cmd->nleft == 0)
774 uptodate = 1;
775 } else {
776 if (uptodate <= 0 && scsi_req(rq)->result == 0)
777 scsi_req(rq)->result = -EIO;
778 }
779
780 if (uptodate == 0 && rq->bio)
781 if (ide_cd_error_cmd(drive, cmd))
782 return ide_stopped;
783
784 /* make sure it's fully ended */
785 if (blk_rq_is_passthrough(rq)) {
786 scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
787 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
788 scsi_req(rq)->resid_len += cmd->last_xfer_len;
789 }
790
791 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
792
793 if (sense && rc == 2)
794 ide_error(drive, "request sense failure", stat);
795 }
796
797 ide_cd_free_sense(drive);
798 return ide_stopped;
799}
800
801static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
802{
803 struct cdrom_info *cd = drive->driver_data;
804 struct request_queue *q = drive->queue;
805 int write = rq_data_dir(rq) == WRITE;
806 unsigned short sectors_per_frame =
807 queue_logical_block_size(q) >> SECTOR_SHIFT;
808
809 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
810 "secs_per_frame: %u",
811 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
812
813 if (write) {
814 /* disk has become write protected */
815 if (get_disk_ro(cd->disk))
816 return ide_stopped;
817 } else {
818 /*
819 * We may be retrying this request after an error. Fix up any
820 * weirdness which might be present in the request packet.
821 */
822 ide_cdrom_prep_rq(drive, rq);
823 }
824
825 /* fs requests *must* be hardware frame aligned */
826 if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
827 (blk_rq_pos(rq) & (sectors_per_frame - 1)))
828 return ide_stopped;
829
830 /* use DMA, if possible */
831 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
832
833 if (write)
834 cd->devinfo.media_written = 1;
835
836 rq->timeout = ATAPI_WAIT_PC;
837
838 return ide_started;
839}
840
841static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
842{
843
844 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
845 rq->cmd[0], rq->cmd_type);
846
847 if (blk_rq_is_scsi(rq))
848 rq->rq_flags |= RQF_QUIET;
849 else
850 rq->rq_flags &= ~RQF_FAILED;
851
852 drive->dma = 0;
853
854 /* sg request */
855 if (rq->bio) {
856 struct request_queue *q = drive->queue;
857 char *buf = bio_data(rq->bio);
858 unsigned int alignment;
859
860 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
861
862 /*
863 * check if dma is safe
864 *
865 * NOTE! The "len" and "addr" checks should possibly have
866 * separate masks.
867 */
868 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
869 if ((unsigned long)buf & alignment
870 || blk_rq_bytes(rq) & q->dma_pad_mask
871 || object_is_on_stack(buf))
872 drive->dma = 0;
873 }
874}
875
876static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
877 sector_t block)
878{
879 struct ide_cmd cmd;
880 int uptodate = 0;
881 unsigned int nsectors;
882
883 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
884 rq->cmd[0], (unsigned long long)block);
885
886 if (drive->debug_mask & IDE_DBG_RQ)
887 blk_dump_rq_flags(rq, "ide_cd_do_request");
888
889 switch (req_op(rq)) {
890 default:
891 if (cdrom_start_rw(drive, rq) == ide_stopped)
892 goto out_end;
893 break;
894 case REQ_OP_SCSI_IN:
895 case REQ_OP_SCSI_OUT:
896 handle_pc:
897 if (!rq->timeout)
898 rq->timeout = ATAPI_WAIT_PC;
899 cdrom_do_block_pc(drive, rq);
900 break;
901 case REQ_OP_DRV_IN:
902 case REQ_OP_DRV_OUT:
903 switch (ide_req(rq)->type) {
904 case ATA_PRIV_MISC:
905 /* right now this can only be a reset... */
906 uptodate = 1;
907 goto out_end;
908 case ATA_PRIV_SENSE:
909 case ATA_PRIV_PC:
910 goto handle_pc;
911 default:
912 BUG();
913 }
914 }
915
916 /* prepare sense request for this command */
917 ide_prep_sense(drive, rq);
918
919 memset(&cmd, 0, sizeof(cmd));
920
921 if (rq_data_dir(rq))
922 cmd.tf_flags |= IDE_TFLAG_WRITE;
923
924 cmd.rq = rq;
925
926 if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
927 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
928 ide_map_sg(drive, &cmd);
929 }
930
931 return ide_issue_pc(drive, &cmd);
932out_end:
933 nsectors = blk_rq_sectors(rq);
934
935 if (nsectors == 0)
936 nsectors = 1;
937
938 ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
939
940 return ide_stopped;
941}
942
943/*
944 * Ioctl handling.
945 *
946 * Routines which queue packet commands take as a final argument a pointer to a
947 * request_sense struct. If execution of the command results in an error with a
948 * CHECK CONDITION status, this structure will be filled with the results of the
949 * subsequent request sense command. The pointer can also be NULL, in which case
950 * no sense information is returned.
951 */
952static void msf_from_bcd(struct atapi_msf *msf)
953{
954 msf->minute = bcd2bin(msf->minute);
955 msf->second = bcd2bin(msf->second);
956 msf->frame = bcd2bin(msf->frame);
957}
958
959int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
960{
961 struct cdrom_info *info = drive->driver_data;
962 struct cdrom_device_info *cdi;
963 unsigned char cmd[BLK_MAX_CDB];
964
965 ide_debug_log(IDE_DBG_FUNC, "enter");
966
967 if (!info)
968 return -EIO;
969
970 cdi = &info->devinfo;
971
972 memset(cmd, 0, BLK_MAX_CDB);
973 cmd[0] = GPCMD_TEST_UNIT_READY;
974
975 /*
976 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
977 * instead of supporting the LOAD_UNLOAD opcode.
978 */
979 cmd[7] = cdi->sanyo_slot % 3;
980
981 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
982}
983
984static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
985 unsigned long *sectors_per_frame)
986{
987 struct {
988 __be32 lba;
989 __be32 blocklen;
990 } capbuf;
991
992 int stat;
993 unsigned char cmd[BLK_MAX_CDB];
994 unsigned len = sizeof(capbuf);
995 u32 blocklen;
996
997 ide_debug_log(IDE_DBG_FUNC, "enter");
998
999 memset(cmd, 0, BLK_MAX_CDB);
1000 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1001
1002 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, NULL, 0,
1003 RQF_QUIET);
1004 if (stat)
1005 return stat;
1006
1007 /*
1008 * Sanity check the given block size, in so far as making
1009 * sure the sectors_per_frame we give to the caller won't
1010 * end up being bogus.
1011 */
1012 blocklen = be32_to_cpu(capbuf.blocklen);
1013 blocklen = (blocklen >> SECTOR_SHIFT) << SECTOR_SHIFT;
1014 switch (blocklen) {
1015 case 512:
1016 case 1024:
1017 case 2048:
1018 case 4096:
1019 break;
1020 default:
1021 printk_once(KERN_ERR PFX "%s: weird block size %u; "
1022 "setting default block size to 2048\n",
1023 drive->name, blocklen);
1024 blocklen = 2048;
1025 break;
1026 }
1027
1028 *capacity = 1 + be32_to_cpu(capbuf.lba);
1029 *sectors_per_frame = blocklen >> SECTOR_SHIFT;
1030
1031 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1032 *capacity, *sectors_per_frame);
1033
1034 return 0;
1035}
1036
1037static int ide_cdrom_read_tocentry(ide_drive_t *drive, int trackno,
1038 int msf_flag, int format, char *buf, int buflen)
1039{
1040 unsigned char cmd[BLK_MAX_CDB];
1041
1042 ide_debug_log(IDE_DBG_FUNC, "enter");
1043
1044 memset(cmd, 0, BLK_MAX_CDB);
1045
1046 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1047 cmd[6] = trackno;
1048 cmd[7] = (buflen >> 8);
1049 cmd[8] = (buflen & 0xff);
1050 cmd[9] = (format << 6);
1051
1052 if (msf_flag)
1053 cmd[1] = 2;
1054
1055 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, NULL, 0, RQF_QUIET);
1056}
1057
1058/* Try to read the entire TOC for the disk into our internal buffer. */
1059int ide_cd_read_toc(ide_drive_t *drive)
1060{
1061 int stat, ntracks, i;
1062 struct cdrom_info *info = drive->driver_data;
1063 struct cdrom_device_info *cdi = &info->devinfo;
1064 struct atapi_toc *toc = info->toc;
1065 struct {
1066 struct atapi_toc_header hdr;
1067 struct atapi_toc_entry ent;
1068 } ms_tmp;
1069 long last_written;
1070 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1071
1072 ide_debug_log(IDE_DBG_FUNC, "enter");
1073
1074 if (toc == NULL) {
1075 /* try to allocate space */
1076 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1077 if (toc == NULL) {
1078 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1079 drive->name);
1080 return -ENOMEM;
1081 }
1082 info->toc = toc;
1083 }
1084
1085 /*
1086 * Check to see if the existing data is still valid. If it is,
1087 * just return.
1088 */
1089 (void) cdrom_check_status(drive, NULL);
1090
1091 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1092 return 0;
1093
1094 /* try to get the total cdrom capacity and sector size */
1095 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame);
1096 if (stat)
1097 toc->capacity = 0x1fffff;
1098
1099 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1100 /* save a private copy of the TOC capacity for error handling */
1101 drive->probed_capacity = toc->capacity * sectors_per_frame;
1102
1103 blk_queue_logical_block_size(drive->queue,
1104 sectors_per_frame << SECTOR_SHIFT);
1105
1106 /* first read just the header, so we know how long the TOC is */
1107 stat = ide_cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1108 sizeof(struct atapi_toc_header));
1109 if (stat)
1110 return stat;
1111
1112 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1113 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1114 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1115 }
1116
1117 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1118 if (ntracks <= 0)
1119 return -EIO;
1120 if (ntracks > MAX_TRACKS)
1121 ntracks = MAX_TRACKS;
1122
1123 /* now read the whole schmeer */
1124 stat = ide_cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1125 (char *)&toc->hdr,
1126 sizeof(struct atapi_toc_header) +
1127 (ntracks + 1) *
1128 sizeof(struct atapi_toc_entry));
1129
1130 if (stat && toc->hdr.first_track > 1) {
1131 /*
1132 * Cds with CDI tracks only don't have any TOC entries, despite
1133 * of this the returned values are
1134 * first_track == last_track = number of CDI tracks + 1,
1135 * so that this case is indistinguishable from the same layout
1136 * plus an additional audio track. If we get an error for the
1137 * regular case, we assume a CDI without additional audio
1138 * tracks. In this case the readable TOC is empty (CDI tracks
1139 * are not included) and only holds the Leadout entry.
1140 *
1141 * Heiko Eißfeldt.
1142 */
1143 ntracks = 0;
1144 stat = ide_cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1145 (char *)&toc->hdr,
1146 sizeof(struct atapi_toc_header) +
1147 (ntracks + 1) *
1148 sizeof(struct atapi_toc_entry));
1149 if (stat)
1150 return stat;
1151
1152 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1153 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1154 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1155 } else {
1156 toc->hdr.first_track = CDROM_LEADOUT;
1157 toc->hdr.last_track = CDROM_LEADOUT;
1158 }
1159 }
1160
1161 if (stat)
1162 return stat;
1163
1164 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1165
1166 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1167 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1168 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1169 }
1170
1171 for (i = 0; i <= ntracks; i++) {
1172 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1173 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1174 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1175 msf_from_bcd(&toc->ent[i].addr.msf);
1176 }
1177 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1178 toc->ent[i].addr.msf.second,
1179 toc->ent[i].addr.msf.frame);
1180 }
1181
1182 if (toc->hdr.first_track != CDROM_LEADOUT) {
1183 /* read the multisession information */
1184 stat = ide_cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1185 sizeof(ms_tmp));
1186 if (stat)
1187 return stat;
1188
1189 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1190 } else {
1191 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1192 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1193 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1194 }
1195
1196 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1197 /* re-read multisession information using MSF format */
1198 stat = ide_cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1199 sizeof(ms_tmp));
1200 if (stat)
1201 return stat;
1202
1203 msf_from_bcd(&ms_tmp.ent.addr.msf);
1204 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1205 ms_tmp.ent.addr.msf.second,
1206 ms_tmp.ent.addr.msf.frame);
1207 }
1208
1209 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1210
1211 /* now try to get the total cdrom capacity */
1212 stat = cdrom_get_last_written(cdi, &last_written);
1213 if (!stat && (last_written > toc->capacity)) {
1214 toc->capacity = last_written;
1215 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1216 drive->probed_capacity = toc->capacity * sectors_per_frame;
1217 }
1218
1219 /* Remember that we've read this stuff. */
1220 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1221
1222 return 0;
1223}
1224
1225int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1226{
1227 struct cdrom_info *info = drive->driver_data;
1228 struct cdrom_device_info *cdi = &info->devinfo;
1229 struct packet_command cgc;
1230 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1231
1232 ide_debug_log(IDE_DBG_FUNC, "enter");
1233
1234 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1235 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1236
1237 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1238 do {
1239 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1240 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1241 if (!stat)
1242 break;
1243 } while (--attempts);
1244 return stat;
1245}
1246
1247void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1248{
1249 struct cdrom_info *cd = drive->driver_data;
1250 u16 curspeed, maxspeed;
1251
1252 ide_debug_log(IDE_DBG_FUNC, "enter");
1253
1254 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1255 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1256 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1257 } else {
1258 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1259 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1260 }
1261
1262 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1263 curspeed, maxspeed);
1264
1265 cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1266 cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1267}
1268
1269#define IDE_CD_CAPABILITIES \
1270 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1271 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1272 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1273 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1274 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1275
1276static const struct cdrom_device_ops ide_cdrom_dops = {
1277 .open = ide_cdrom_open_real,
1278 .release = ide_cdrom_release_real,
1279 .drive_status = ide_cdrom_drive_status,
1280 .check_events = ide_cdrom_check_events_real,
1281 .tray_move = ide_cdrom_tray_move,
1282 .lock_door = ide_cdrom_lock_door,
1283 .select_speed = ide_cdrom_select_speed,
1284 .get_last_session = ide_cdrom_get_last_session,
1285 .get_mcn = ide_cdrom_get_mcn,
1286 .reset = ide_cdrom_reset,
1287 .audio_ioctl = ide_cdrom_audio_ioctl,
1288 .capability = IDE_CD_CAPABILITIES,
1289 .generic_packet = ide_cdrom_packet,
1290};
1291
1292static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1293{
1294 struct cdrom_info *info = drive->driver_data;
1295 struct cdrom_device_info *devinfo = &info->devinfo;
1296
1297 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1298
1299 devinfo->ops = &ide_cdrom_dops;
1300 devinfo->speed = info->current_speed;
1301 devinfo->capacity = nslots;
1302 devinfo->handle = drive;
1303 strcpy(devinfo->name, drive->name);
1304
1305 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1306 devinfo->mask |= CDC_SELECT_SPEED;
1307
1308 return register_cdrom(info->disk, devinfo);
1309}
1310
1311static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1312{
1313 struct cdrom_info *cd = drive->driver_data;
1314 struct cdrom_device_info *cdi = &cd->devinfo;
1315 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1316 mechtype_t mechtype;
1317 int nslots = 1;
1318
1319 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1320 drive->media, drive->atapi_flags);
1321
1322 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1323 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1324 CDC_MO_DRIVE | CDC_RAM);
1325
1326 if (drive->media == ide_optical) {
1327 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1328 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1329 drive->name);
1330 return nslots;
1331 }
1332
1333 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1334 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1335 cdi->mask &= ~CDC_PLAY_AUDIO;
1336 return nslots;
1337 }
1338
1339 /*
1340 * We have to cheat a little here. the packet will eventually be queued
1341 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1342 * Since this device hasn't been registered with the Uniform layer yet,
1343 * it can't do this. Same goes for cdi->ops.
1344 */
1345 cdi->handle = drive;
1346 cdi->ops = &ide_cdrom_dops;
1347
1348 if (ide_cdrom_get_capabilities(drive, buf))
1349 return 0;
1350
1351 if ((buf[8 + 6] & 0x01) == 0)
1352 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1353 if (buf[8 + 6] & 0x08)
1354 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1355 if (buf[8 + 3] & 0x01)
1356 cdi->mask &= ~CDC_CD_R;
1357 if (buf[8 + 3] & 0x02)
1358 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1359 if (buf[8 + 2] & 0x38)
1360 cdi->mask &= ~CDC_DVD;
1361 if (buf[8 + 3] & 0x20)
1362 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1363 if (buf[8 + 3] & 0x10)
1364 cdi->mask &= ~CDC_DVD_R;
1365 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1366 cdi->mask &= ~CDC_PLAY_AUDIO;
1367
1368 mechtype = buf[8 + 6] >> 5;
1369 if (mechtype == mechtype_caddy ||
1370 mechtype == mechtype_popup ||
1371 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1372 cdi->mask |= CDC_CLOSE_TRAY;
1373
1374 if (cdi->sanyo_slot > 0) {
1375 cdi->mask &= ~CDC_SELECT_DISC;
1376 nslots = 3;
1377 } else if (mechtype == mechtype_individual_changer ||
1378 mechtype == mechtype_cartridge_changer) {
1379 nslots = cdrom_number_of_slots(cdi);
1380 if (nslots > 1)
1381 cdi->mask &= ~CDC_SELECT_DISC;
1382 }
1383
1384 ide_cdrom_update_speed(drive, buf);
1385
1386 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1387
1388 /* don't print speed if the drive reported 0 */
1389 if (cd->max_speed)
1390 printk(KERN_CONT " %dX", cd->max_speed);
1391
1392 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1393
1394 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1395 printk(KERN_CONT " DVD%s%s",
1396 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1397 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1398
1399 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1400 printk(KERN_CONT " CD%s%s",
1401 (cdi->mask & CDC_CD_R) ? "" : "-R",
1402 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1403
1404 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1405 printk(KERN_CONT " changer w/%d slots", nslots);
1406 else
1407 printk(KERN_CONT " drive");
1408
1409 printk(KERN_CONT ", %dkB Cache\n",
1410 be16_to_cpup((__be16 *)&buf[8 + 12]));
1411
1412 return nslots;
1413}
1414
1415struct cd_list_entry {
1416 const char *id_model;
1417 const char *id_firmware;
1418 unsigned int cd_flags;
1419};
1420
1421#ifdef CONFIG_IDE_PROC_FS
1422static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1423{
1424 unsigned long capacity, sectors_per_frame;
1425
1426 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame))
1427 return 0;
1428
1429 return capacity * sectors_per_frame;
1430}
1431
1432static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1433{
1434 ide_drive_t *drive = m->private;
1435
1436 seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1437 return 0;
1438}
1439
1440static ide_proc_entry_t idecd_proc[] = {
1441 { "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
1442 {}
1443};
1444
1445static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1446{
1447 return idecd_proc;
1448}
1449
1450static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1451{
1452 return NULL;
1453}
1454#endif
1455
1456static const struct cd_list_entry ide_cd_quirks_list[] = {
1457 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1458 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1459 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1460 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1461 IDE_AFLAG_PRE_ATAPI12, },
1462 /* Vertos 300, some versions of this drive like to talk BCD. */
1463 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1464 /* Vertos 600 ESD. */
1465 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1466 /*
1467 * Sanyo 3 CD changer uses a non-standard command for CD changing
1468 * (by default standard ATAPI support for CD changers is used).
1469 */
1470 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1471 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1472 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1473 /* Stingray 8X CD-ROM. */
1474 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1475 /*
1476 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1477 * mode sense page capabilities size, but older drives break.
1478 */
1479 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1480 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1481 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1482 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1483 /*
1484 * Some drives used by Apple don't advertise audio play
1485 * but they do support reading TOC & audio datas.
1486 */
1487 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1488 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1489 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1490 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1491 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1492 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1493 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1494 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1495 { NULL, NULL, 0 }
1496};
1497
1498static unsigned int ide_cd_flags(u16 *id)
1499{
1500 const struct cd_list_entry *cle = ide_cd_quirks_list;
1501
1502 while (cle->id_model) {
1503 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1504 (cle->id_firmware == NULL ||
1505 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1506 return cle->cd_flags;
1507 cle++;
1508 }
1509
1510 return 0;
1511}
1512
1513static int ide_cdrom_setup(ide_drive_t *drive)
1514{
1515 struct cdrom_info *cd = drive->driver_data;
1516 struct cdrom_device_info *cdi = &cd->devinfo;
1517 struct request_queue *q = drive->queue;
1518 u16 *id = drive->id;
1519 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1520 int nslots;
1521
1522 ide_debug_log(IDE_DBG_PROBE, "enter");
1523
1524 drive->prep_rq = ide_cdrom_prep_rq;
1525 blk_queue_dma_alignment(q, 31);
1526 blk_queue_update_dma_pad(q, 15);
1527
1528 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1529 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1530
1531 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1532 fw_rev[4] == '1' && fw_rev[6] <= '2')
1533 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1534 IDE_AFLAG_TOCADDR_AS_BCD);
1535 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1536 fw_rev[4] == '1' && fw_rev[6] <= '2')
1537 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1538 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1539 /* 3 => use CD in slot 0 */
1540 cdi->sanyo_slot = 3;
1541
1542 nslots = ide_cdrom_probe_capabilities(drive);
1543
1544 blk_queue_logical_block_size(q, CD_FRAMESIZE);
1545
1546 if (ide_cdrom_register(drive, nslots)) {
1547 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1548 " cdrom driver.\n", drive->name, __func__);
1549 cd->devinfo.handle = NULL;
1550 return 1;
1551 }
1552
1553 ide_proc_register_driver(drive, cd->driver);
1554 return 0;
1555}
1556
1557static void ide_cd_remove(ide_drive_t *drive)
1558{
1559 struct cdrom_info *info = drive->driver_data;
1560
1561 ide_debug_log(IDE_DBG_FUNC, "enter");
1562
1563 ide_proc_unregister_driver(drive, info->driver);
1564 device_del(&info->dev);
1565 del_gendisk(info->disk);
1566
1567 mutex_lock(&idecd_ref_mutex);
1568 put_device(&info->dev);
1569 mutex_unlock(&idecd_ref_mutex);
1570}
1571
1572static void ide_cd_release(struct device *dev)
1573{
1574 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1575 struct cdrom_device_info *devinfo = &info->devinfo;
1576 ide_drive_t *drive = info->drive;
1577 struct gendisk *g = info->disk;
1578
1579 ide_debug_log(IDE_DBG_FUNC, "enter");
1580
1581 kfree(info->toc);
1582 if (devinfo->handle == drive)
1583 unregister_cdrom(devinfo);
1584 drive->driver_data = NULL;
1585 drive->prep_rq = NULL;
1586 g->private_data = NULL;
1587 put_disk(g);
1588 kfree(info);
1589}
1590
1591static int ide_cd_probe(ide_drive_t *);
1592
1593static struct ide_driver ide_cdrom_driver = {
1594 .gen_driver = {
1595 .owner = THIS_MODULE,
1596 .name = "ide-cdrom",
1597 .bus = &ide_bus_type,
1598 },
1599 .probe = ide_cd_probe,
1600 .remove = ide_cd_remove,
1601 .version = IDECD_VERSION,
1602 .do_request = ide_cd_do_request,
1603#ifdef CONFIG_IDE_PROC_FS
1604 .proc_entries = ide_cd_proc_entries,
1605 .proc_devsets = ide_cd_proc_devsets,
1606#endif
1607};
1608
1609static int idecd_open(struct block_device *bdev, fmode_t mode)
1610{
1611 struct cdrom_info *info;
1612 int rc = -ENXIO;
1613
1614 check_disk_change(bdev);
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);
1624out:
1625 mutex_unlock(&ide_cd_mutex);
1626 return rc;
1627}
1628
1629static 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
1640static 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
1660static 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
1679static 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
1701static 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
1713static int idecd_locked_compat_ioctl(struct block_device *bdev, fmode_t mode,
1714 unsigned int cmd, unsigned long arg)
1715{
1716 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1717 void __user *argp = compat_ptr(arg);
1718 int err;
1719
1720 switch (cmd) {
1721 case CDROMSETSPINDOWN:
1722 return idecd_set_spindown(&info->devinfo, (unsigned long)argp);
1723 case CDROMGETSPINDOWN:
1724 return idecd_get_spindown(&info->devinfo, (unsigned long)argp);
1725 default:
1726 break;
1727 }
1728
1729 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1730 if (err == -EINVAL)
1731 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd,
1732 (unsigned long)argp);
1733
1734 return err;
1735}
1736
1737static int idecd_compat_ioctl(struct block_device *bdev, fmode_t mode,
1738 unsigned int cmd, unsigned long arg)
1739{
1740 int ret;
1741
1742 mutex_lock(&ide_cd_mutex);
1743 ret = idecd_locked_compat_ioctl(bdev, mode, cmd, arg);
1744 mutex_unlock(&ide_cd_mutex);
1745
1746 return ret;
1747}
1748
1749static unsigned int idecd_check_events(struct gendisk *disk,
1750 unsigned int clearing)
1751{
1752 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1753 return cdrom_check_events(&info->devinfo, clearing);
1754}
1755
1756static int idecd_revalidate_disk(struct gendisk *disk)
1757{
1758 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1759
1760 ide_cd_read_toc(info->drive);
1761
1762 return 0;
1763}
1764
1765static const struct block_device_operations idecd_ops = {
1766 .owner = THIS_MODULE,
1767 .open = idecd_open,
1768 .release = idecd_release,
1769 .ioctl = idecd_ioctl,
1770 .compat_ioctl = IS_ENABLED(CONFIG_COMPAT) ?
1771 idecd_compat_ioctl : NULL,
1772 .check_events = idecd_check_events,
1773 .revalidate_disk = idecd_revalidate_disk
1774};
1775
1776/* module options */
1777static unsigned long debug_mask;
1778module_param(debug_mask, ulong, 0644);
1779
1780MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1781
1782static int ide_cd_probe(ide_drive_t *drive)
1783{
1784 struct cdrom_info *info;
1785 struct gendisk *g;
1786
1787 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1788 drive->driver_req, drive->media);
1789
1790 if (!strstr("ide-cdrom", drive->driver_req))
1791 goto failed;
1792
1793 if (drive->media != ide_cdrom && drive->media != ide_optical)
1794 goto failed;
1795
1796 drive->debug_mask = debug_mask;
1797 drive->irq_handler = cdrom_newpc_intr;
1798
1799 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1800 if (info == NULL) {
1801 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1802 drive->name);
1803 goto failed;
1804 }
1805
1806 g = alloc_disk(1 << PARTN_BITS);
1807 if (!g)
1808 goto out_free_cd;
1809
1810 ide_init_disk(g, drive);
1811
1812 info->dev.parent = &drive->gendev;
1813 info->dev.release = ide_cd_release;
1814 dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
1815
1816 if (device_register(&info->dev))
1817 goto out_free_disk;
1818
1819 info->drive = drive;
1820 info->driver = &ide_cdrom_driver;
1821 info->disk = g;
1822
1823 g->private_data = &info->driver;
1824
1825 drive->driver_data = info;
1826
1827 g->minors = 1;
1828 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1829 if (ide_cdrom_setup(drive)) {
1830 put_device(&info->dev);
1831 goto failed;
1832 }
1833
1834 ide_cd_read_toc(drive);
1835 g->fops = &idecd_ops;
1836 g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1837 g->events = DISK_EVENT_MEDIA_CHANGE;
1838 device_add_disk(&drive->gendev, g, NULL);
1839 return 0;
1840
1841out_free_disk:
1842 put_disk(g);
1843out_free_cd:
1844 kfree(info);
1845failed:
1846 return -ENODEV;
1847}
1848
1849static void __exit ide_cdrom_exit(void)
1850{
1851 driver_unregister(&ide_cdrom_driver.gen_driver);
1852}
1853
1854static int __init ide_cdrom_init(void)
1855{
1856 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1857 return driver_register(&ide_cdrom_driver.gen_driver);
1858}
1859
1860MODULE_ALIAS("ide:*m-cdrom*");
1861MODULE_ALIAS("ide-cd");
1862module_init(ide_cdrom_init);
1863module_exit(ide_cdrom_exit);
1864MODULE_LICENSE("GPL");