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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 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 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.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/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 #define IDECD_DEBUG_LOG 1
57
58 #if IDECD_DEBUG_LOG
59 #define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args)
60 #else
61 #define ide_debug_log(lvl, fmt, args...) do {} while (0)
62 #endif
63
64 static DEFINE_MUTEX(idecd_ref_mutex);
65
66 static void ide_cd_release(struct kref *);
67
68 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
69 {
70 struct cdrom_info *cd = NULL;
71
72 mutex_lock(&idecd_ref_mutex);
73 cd = ide_drv_g(disk, cdrom_info);
74 if (cd) {
75 if (ide_device_get(cd->drive))
76 cd = NULL;
77 else
78 kref_get(&cd->kref);
79
80 }
81 mutex_unlock(&idecd_ref_mutex);
82 return cd;
83 }
84
85 static void ide_cd_put(struct cdrom_info *cd)
86 {
87 ide_drive_t *drive = cd->drive;
88
89 mutex_lock(&idecd_ref_mutex);
90 kref_put(&cd->kref, ide_cd_release);
91 ide_device_put(drive);
92 mutex_unlock(&idecd_ref_mutex);
93 }
94
95 /*
96 * Generic packet command support and error handling routines.
97 */
98
99 /* Mark that we've seen a media change and invalidate our internal buffers. */
100 static void cdrom_saw_media_change(ide_drive_t *drive)
101 {
102 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
103 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
104 }
105
106 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
107 struct request_sense *sense)
108 {
109 int log = 0;
110
111 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
112 sense->sense_key);
113
114 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
115 return 0;
116
117 switch (sense->sense_key) {
118 case NO_SENSE:
119 case RECOVERED_ERROR:
120 break;
121 case NOT_READY:
122 /*
123 * don't care about tray state messages for e.g. capacity
124 * commands or in-progress or becoming ready
125 */
126 if (sense->asc == 0x3a || sense->asc == 0x04)
127 break;
128 log = 1;
129 break;
130 case ILLEGAL_REQUEST:
131 /*
132 * don't log START_STOP unit with LoEj set, since we cannot
133 * reliably check if drive can auto-close
134 */
135 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
136 break;
137 log = 1;
138 break;
139 case UNIT_ATTENTION:
140 /*
141 * Make good and sure we've seen this potential media change.
142 * Some drives (i.e. Creative) fail to present the correct sense
143 * key in the error register.
144 */
145 cdrom_saw_media_change(drive);
146 break;
147 default:
148 log = 1;
149 break;
150 }
151 return log;
152 }
153
154 static void cdrom_analyze_sense_data(ide_drive_t *drive,
155 struct request *failed_command,
156 struct request_sense *sense)
157 {
158 unsigned long sector;
159 unsigned long bio_sectors;
160 struct cdrom_info *info = drive->driver_data;
161
162 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
163 "sense_key: 0x%x\n", __func__, sense->error_code,
164 sense->sense_key);
165
166 if (failed_command)
167 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
168 __func__, failed_command->cmd[0]);
169
170 if (!cdrom_log_sense(drive, failed_command, sense))
171 return;
172
173 /*
174 * If a read toc is executed for a CD-R or CD-RW medium where the first
175 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
176 * confusing error)
177 */
178 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
179 if (sense->sense_key == 0x05 && sense->asc == 0x24)
180 return;
181
182 /* current error */
183 if (sense->error_code == 0x70) {
184 switch (sense->sense_key) {
185 case MEDIUM_ERROR:
186 case VOLUME_OVERFLOW:
187 case ILLEGAL_REQUEST:
188 if (!sense->valid)
189 break;
190 if (failed_command == NULL ||
191 !blk_fs_request(failed_command))
192 break;
193 sector = (sense->information[0] << 24) |
194 (sense->information[1] << 16) |
195 (sense->information[2] << 8) |
196 (sense->information[3]);
197
198 if (drive->queue->hardsect_size == 2048)
199 /* device sector size is 2K */
200 sector <<= 2;
201
202 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
203 sector &= ~(bio_sectors - 1);
204
205 if (sector < get_capacity(info->disk) &&
206 drive->probed_capacity - sector < 4 * 75)
207 set_capacity(info->disk, sector);
208 }
209 }
210
211 ide_cd_log_error(drive->name, failed_command, sense);
212 }
213
214 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
215 struct request *failed_command)
216 {
217 struct cdrom_info *info = drive->driver_data;
218 struct request *rq = &info->request_sense_request;
219
220 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
221
222 if (sense == NULL)
223 sense = &info->sense_data;
224
225 /* stuff the sense request in front of our current request */
226 blk_rq_init(NULL, rq);
227 rq->cmd_type = REQ_TYPE_ATA_PC;
228 rq->rq_disk = info->disk;
229
230 rq->data = sense;
231 rq->cmd[0] = GPCMD_REQUEST_SENSE;
232 rq->cmd[4] = 18;
233 rq->data_len = 18;
234
235 rq->cmd_type = REQ_TYPE_SENSE;
236 rq->cmd_flags |= REQ_PREEMPT;
237
238 /* NOTE! Save the failed command in "rq->buffer" */
239 rq->buffer = (void *) failed_command;
240
241 if (failed_command)
242 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
243 failed_command->cmd[0]);
244
245 ide_do_drive_cmd(drive, rq);
246 }
247
248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
249 {
250 struct request *rq = HWGROUP(drive)->rq;
251 int nsectors = rq->hard_cur_sectors;
252
253 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
254 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
255 nsectors);
256
257 if (blk_sense_request(rq) && uptodate) {
258 /*
259 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
260 * failed request
261 */
262 struct request *failed = (struct request *) rq->buffer;
263 struct cdrom_info *info = drive->driver_data;
264 void *sense = &info->sense_data;
265 unsigned long flags;
266
267 if (failed) {
268 if (failed->sense) {
269 sense = failed->sense;
270 failed->sense_len = rq->sense_len;
271 }
272 cdrom_analyze_sense_data(drive, failed, sense);
273 /*
274 * now end the failed request
275 */
276 if (blk_fs_request(failed)) {
277 if (ide_end_dequeued_request(drive, failed, 0,
278 failed->hard_nr_sectors))
279 BUG();
280 } else {
281 spin_lock_irqsave(&ide_lock, flags);
282 if (__blk_end_request(failed, -EIO,
283 failed->data_len))
284 BUG();
285 spin_unlock_irqrestore(&ide_lock, flags);
286 }
287 } else
288 cdrom_analyze_sense_data(drive, NULL, sense);
289 }
290
291 if (!rq->current_nr_sectors && blk_fs_request(rq))
292 uptodate = 1;
293 /* make sure it's fully ended */
294 if (blk_pc_request(rq))
295 nsectors = (rq->data_len + 511) >> 9;
296 if (!nsectors)
297 nsectors = 1;
298
299 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
300 __func__, uptodate, nsectors);
301
302 ide_end_request(drive, uptodate, nsectors);
303 }
304
305 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
306 {
307 if (st & 0x80)
308 return;
309 ide_dump_status(drive, msg, st);
310 }
311
312 /*
313 * Returns:
314 * 0: if the request should be continued.
315 * 1: if the request was ended.
316 */
317 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
318 {
319 ide_hwif_t *hwif = drive->hwif;
320 struct request *rq = hwif->hwgroup->rq;
321 int stat, err, sense_key;
322
323 /* check for errors */
324 stat = hwif->tp_ops->read_status(hwif);
325
326 if (stat_ret)
327 *stat_ret = stat;
328
329 if (OK_STAT(stat, good_stat, BAD_R_STAT))
330 return 0;
331
332 /* get the IDE error register */
333 err = ide_read_error(drive);
334 sense_key = err >> 4;
335
336 if (rq == NULL) {
337 printk(KERN_ERR PFX "%s: missing rq in %s\n",
338 drive->name, __func__);
339 return 1;
340 }
341
342 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
343 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
344 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
345
346 if (blk_sense_request(rq)) {
347 /*
348 * We got an error trying to get sense info from the drive
349 * (probably while trying to recover from a former error).
350 * Just give up.
351 */
352 rq->cmd_flags |= REQ_FAILED;
353 cdrom_end_request(drive, 0);
354 ide_error(drive, "request sense failure", stat);
355 return 1;
356
357 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
358 /* All other functions, except for READ. */
359
360 /*
361 * if we have an error, pass back CHECK_CONDITION as the
362 * scsi status byte
363 */
364 if (blk_pc_request(rq) && !rq->errors)
365 rq->errors = SAM_STAT_CHECK_CONDITION;
366
367 /* check for tray open */
368 if (sense_key == NOT_READY) {
369 cdrom_saw_media_change(drive);
370 } else if (sense_key == UNIT_ATTENTION) {
371 /* check for media change */
372 cdrom_saw_media_change(drive);
373 return 0;
374 } else if (sense_key == ILLEGAL_REQUEST &&
375 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
376 /*
377 * Don't print error message for this condition--
378 * SFF8090i indicates that 5/24/00 is the correct
379 * response to a request to close the tray if the
380 * drive doesn't have that capability.
381 * cdrom_log_sense() knows this!
382 */
383 } else if (!(rq->cmd_flags & REQ_QUIET)) {
384 /* otherwise, print an error */
385 ide_dump_status(drive, "packet command error", stat);
386 }
387
388 rq->cmd_flags |= REQ_FAILED;
389
390 /*
391 * instead of playing games with moving completions around,
392 * remove failed request completely and end it when the
393 * request sense has completed
394 */
395 goto end_request;
396
397 } else if (blk_fs_request(rq)) {
398 int do_end_request = 0;
399
400 /* handle errors from READ and WRITE requests */
401
402 if (blk_noretry_request(rq))
403 do_end_request = 1;
404
405 if (sense_key == NOT_READY) {
406 /* tray open */
407 if (rq_data_dir(rq) == READ) {
408 cdrom_saw_media_change(drive);
409
410 /* fail the request */
411 printk(KERN_ERR PFX "%s: tray open\n",
412 drive->name);
413 do_end_request = 1;
414 } else {
415 struct cdrom_info *info = drive->driver_data;
416
417 /*
418 * Allow the drive 5 seconds to recover, some
419 * devices will return this error while flushing
420 * data from cache.
421 */
422 if (!rq->errors)
423 info->write_timeout = jiffies +
424 ATAPI_WAIT_WRITE_BUSY;
425 rq->errors = 1;
426 if (time_after(jiffies, info->write_timeout))
427 do_end_request = 1;
428 else {
429 unsigned long flags;
430
431 /*
432 * take a breather relying on the unplug
433 * timer to kick us again
434 */
435 spin_lock_irqsave(&ide_lock, flags);
436 blk_plug_device(drive->queue);
437 spin_unlock_irqrestore(&ide_lock,
438 flags);
439 return 1;
440 }
441 }
442 } else if (sense_key == UNIT_ATTENTION) {
443 /* media change */
444 cdrom_saw_media_change(drive);
445
446 /*
447 * Arrange to retry the request but be sure to give up
448 * if we've retried too many times.
449 */
450 if (++rq->errors > ERROR_MAX)
451 do_end_request = 1;
452 } else if (sense_key == ILLEGAL_REQUEST ||
453 sense_key == DATA_PROTECT) {
454 /*
455 * No point in retrying after an illegal request or data
456 * protect error.
457 */
458 ide_dump_status_no_sense(drive, "command error", stat);
459 do_end_request = 1;
460 } else if (sense_key == MEDIUM_ERROR) {
461 /*
462 * No point in re-trying a zillion times on a bad
463 * sector. If we got here the error is not correctable.
464 */
465 ide_dump_status_no_sense(drive,
466 "media error (bad sector)",
467 stat);
468 do_end_request = 1;
469 } else if (sense_key == BLANK_CHECK) {
470 /* disk appears blank ?? */
471 ide_dump_status_no_sense(drive, "media error (blank)",
472 stat);
473 do_end_request = 1;
474 } else if ((err & ~ATA_ABORTED) != 0) {
475 /* go to the default handler for other errors */
476 ide_error(drive, "cdrom_decode_status", stat);
477 return 1;
478 } else if ((++rq->errors > ERROR_MAX)) {
479 /* we've racked up too many retries, abort */
480 do_end_request = 1;
481 }
482
483 /*
484 * End a request through request sense analysis when we have
485 * sense data. We need this in order to perform end of media
486 * processing.
487 */
488 if (do_end_request)
489 goto end_request;
490
491 /*
492 * If we got a CHECK_CONDITION status, queue
493 * a request sense command.
494 */
495 if (stat & ATA_ERR)
496 cdrom_queue_request_sense(drive, NULL, NULL);
497 } else {
498 blk_dump_rq_flags(rq, PFX "bad rq");
499 cdrom_end_request(drive, 0);
500 }
501
502 /* retry, or handle the next request */
503 return 1;
504
505 end_request:
506 if (stat & ATA_ERR) {
507 unsigned long flags;
508
509 spin_lock_irqsave(&ide_lock, flags);
510 blkdev_dequeue_request(rq);
511 HWGROUP(drive)->rq = NULL;
512 spin_unlock_irqrestore(&ide_lock, flags);
513
514 cdrom_queue_request_sense(drive, rq->sense, rq);
515 } else
516 cdrom_end_request(drive, 0);
517
518 return 1;
519 }
520
521 static int cdrom_timer_expiry(ide_drive_t *drive)
522 {
523 struct request *rq = HWGROUP(drive)->rq;
524 unsigned long wait = 0;
525
526 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__,
527 rq->cmd[0]);
528
529 /*
530 * Some commands are *slow* and normally take a long time to complete.
531 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
532 * commands/drives support that. Let ide_timer_expiry keep polling us
533 * for these.
534 */
535 switch (rq->cmd[0]) {
536 case GPCMD_BLANK:
537 case GPCMD_FORMAT_UNIT:
538 case GPCMD_RESERVE_RZONE_TRACK:
539 case GPCMD_CLOSE_TRACK:
540 case GPCMD_FLUSH_CACHE:
541 wait = ATAPI_WAIT_PC;
542 break;
543 default:
544 if (!(rq->cmd_flags & REQ_QUIET))
545 printk(KERN_INFO PFX "cmd 0x%x timed out\n",
546 rq->cmd[0]);
547 wait = 0;
548 break;
549 }
550 return wait;
551 }
552
553 /*
554 * Set up the device registers for transferring a packet command on DEV,
555 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
556 * which actually transfers the command to the drive. If this is a
557 * drq_interrupt device, this routine will arrange for HANDLER to be
558 * called when the interrupt from the drive arrives. Otherwise, HANDLER
559 * will be called immediately after the drive is prepared for the transfer.
560 */
561 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
562 int xferlen,
563 ide_handler_t *handler)
564 {
565 ide_hwif_t *hwif = drive->hwif;
566
567 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
568
569 /* FIXME: for Virtual DMA we must check harder */
570 if (drive->dma)
571 drive->dma = !hwif->dma_ops->dma_setup(drive);
572
573 /* set up the controller registers */
574 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
575 xferlen, drive->dma);
576
577 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
578 /* waiting for CDB interrupt, not DMA yet. */
579 if (drive->dma)
580 drive->waiting_for_dma = 0;
581
582 /* packet command */
583 ide_execute_command(drive, ATA_CMD_PACKET, handler,
584 ATAPI_WAIT_PC, cdrom_timer_expiry);
585 return ide_started;
586 } else {
587 ide_execute_pkt_cmd(drive);
588
589 return (*handler) (drive);
590 }
591 }
592
593 /*
594 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
595 * registers must have already been prepared by cdrom_start_packet_command.
596 * HANDLER is the interrupt handler to call when the command completes or
597 * there's data ready.
598 */
599 #define ATAPI_MIN_CDB_BYTES 12
600 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
601 struct request *rq,
602 ide_handler_t *handler)
603 {
604 ide_hwif_t *hwif = drive->hwif;
605 int cmd_len;
606 ide_startstop_t startstop;
607
608 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
609
610 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
611 /*
612 * Here we should have been called after receiving an interrupt
613 * from the device. DRQ should how be set.
614 */
615
616 /* check for errors */
617 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
618 return ide_stopped;
619
620 /* ok, next interrupt will be DMA interrupt */
621 if (drive->dma)
622 drive->waiting_for_dma = 1;
623 } else {
624 /* otherwise, we must wait for DRQ to get set */
625 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
626 ATA_BUSY, WAIT_READY))
627 return startstop;
628 }
629
630 /* arm the interrupt handler */
631 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
632
633 /* ATAPI commands get padded out to 12 bytes minimum */
634 cmd_len = COMMAND_SIZE(rq->cmd[0]);
635 if (cmd_len < ATAPI_MIN_CDB_BYTES)
636 cmd_len = ATAPI_MIN_CDB_BYTES;
637
638 /* send the command to the device */
639 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
640
641 /* start the DMA if need be */
642 if (drive->dma)
643 hwif->dma_ops->dma_start(drive);
644
645 return ide_started;
646 }
647
648 /*
649 * Check the contents of the interrupt reason register from the cdrom
650 * and attempt to recover if there are problems. Returns 0 if everything's
651 * ok; nonzero if the request has been terminated.
652 */
653 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
654 int len, int ireason, int rw)
655 {
656 ide_hwif_t *hwif = drive->hwif;
657
658 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
659 __func__, ireason, rw);
660
661 /*
662 * ireason == 0: the drive wants to receive data from us
663 * ireason == 2: the drive is expecting to transfer data to us
664 */
665 if (ireason == (!rw << 1))
666 return 0;
667 else if (ireason == (rw << 1)) {
668
669 /* whoops... */
670 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
671 drive->name, __func__);
672
673 ide_pad_transfer(drive, rw, len);
674 } else if (rw == 0 && ireason == 1) {
675 /*
676 * Some drives (ASUS) seem to tell us that status info is
677 * available. Just get it and ignore.
678 */
679 (void)hwif->tp_ops->read_status(hwif);
680 return 0;
681 } else {
682 /* drive wants a command packet, or invalid ireason... */
683 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
684 drive->name, __func__, ireason);
685 }
686
687 if (rq->cmd_type == REQ_TYPE_ATA_PC)
688 rq->cmd_flags |= REQ_FAILED;
689
690 cdrom_end_request(drive, 0);
691 return -1;
692 }
693
694 /*
695 * Assume that the drive will always provide data in multiples of at least
696 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
697 */
698 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
699 {
700 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
701
702 if ((len % SECTOR_SIZE) == 0)
703 return 0;
704
705 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
706 __func__, len);
707
708 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
709 printk(KERN_ERR PFX "This drive is not supported by this "
710 "version of the driver\n");
711 else {
712 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
713 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
714 }
715
716 return 1;
717 }
718
719 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
720
721 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
722 struct request *rq)
723 {
724 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
725 rq->cmd_flags);
726
727 if (rq_data_dir(rq) == READ) {
728 unsigned short sectors_per_frame =
729 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
730 int nskip = rq->sector & (sectors_per_frame - 1);
731
732 /*
733 * If the requested sector doesn't start on a frame boundary,
734 * we must adjust the start of the transfer so that it does,
735 * and remember to skip the first few sectors.
736 *
737 * If the rq->current_nr_sectors field is larger than the size
738 * of the buffer, it will mean that we're to skip a number of
739 * sectors equal to the amount by which rq->current_nr_sectors
740 * is larger than the buffer size.
741 */
742 if (nskip > 0) {
743 /* sanity check... */
744 if (rq->current_nr_sectors !=
745 bio_cur_sectors(rq->bio)) {
746 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
747 drive->name, __func__,
748 rq->current_nr_sectors);
749 cdrom_end_request(drive, 0);
750 return ide_stopped;
751 }
752 rq->current_nr_sectors += nskip;
753 }
754 }
755
756 /* set up the command */
757 rq->timeout = ATAPI_WAIT_PC;
758
759 return ide_started;
760 }
761
762 /*
763 * Routine to send a read/write packet command to the drive. This is usually
764 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
765 * devices, it is called from an interrupt when the drive is ready to accept
766 * the command.
767 */
768 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
769 {
770 struct request *rq = drive->hwif->hwgroup->rq;
771
772 /* send the command to the drive and return */
773 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
774 }
775
776 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
777 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
778 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
779
780 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
781 {
782 struct cdrom_info *info = drive->driver_data;
783 int stat;
784 static int retry = 10;
785
786 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
787
788 if (cdrom_decode_status(drive, 0, &stat))
789 return ide_stopped;
790
791 drive->atapi_flags |= IDE_AFLAG_SEEKING;
792
793 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
794 if (--retry == 0)
795 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
796 }
797 return ide_stopped;
798 }
799
800 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
801 {
802 sector_t frame = rq->sector;
803
804 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
805
806 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
807
808 memset(rq->cmd, 0, BLK_MAX_CDB);
809 rq->cmd[0] = GPCMD_SEEK;
810 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
811
812 rq->timeout = ATAPI_WAIT_PC;
813 }
814
815 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
816 {
817 struct request *rq = drive->hwif->hwgroup->rq;
818
819 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
820 }
821
822 /*
823 * Fix up a possibly partially-processed request so that we can start it over
824 * entirely, or even put it back on the request queue.
825 */
826 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
827 {
828
829 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
830
831 if (rq->buffer != bio_data(rq->bio)) {
832 sector_t n =
833 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
834
835 rq->buffer = bio_data(rq->bio);
836 rq->nr_sectors += n;
837 rq->sector -= n;
838 }
839 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
840 rq->hard_cur_sectors = rq->current_nr_sectors;
841 rq->hard_nr_sectors = rq->nr_sectors;
842 rq->hard_sector = rq->sector;
843 rq->q->prep_rq_fn(rq->q, rq);
844 }
845
846 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
847 {
848 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
849 __func__, rq->cmd[0]);
850
851 /*
852 * Some of the trailing request sense fields are optional,
853 * and some drives don't send them. Sigh.
854 */
855 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
856 rq->data_len > 0 && rq->data_len <= 5)
857 while (rq->data_len > 0) {
858 *(u8 *)rq->data++ = 0;
859 --rq->data_len;
860 }
861 }
862
863 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
864 int write, void *buffer, unsigned *bufflen,
865 struct request_sense *sense, int timeout,
866 unsigned int cmd_flags)
867 {
868 struct cdrom_info *info = drive->driver_data;
869 struct request_sense local_sense;
870 int retries = 10;
871 unsigned int flags = 0;
872
873 if (!sense)
874 sense = &local_sense;
875
876 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
877 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
878 timeout, cmd_flags);
879
880 /* start of retry loop */
881 do {
882 struct request *rq;
883 int error;
884
885 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
886
887 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
888 rq->cmd_type = REQ_TYPE_ATA_PC;
889 rq->sense = sense;
890 rq->cmd_flags |= cmd_flags;
891 rq->timeout = timeout;
892 if (buffer) {
893 rq->data = buffer;
894 rq->data_len = *bufflen;
895 }
896
897 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
898
899 if (buffer)
900 *bufflen = rq->data_len;
901
902 flags = rq->cmd_flags;
903 blk_put_request(rq);
904
905 /*
906 * FIXME: we should probably abort/retry or something in case of
907 * failure.
908 */
909 if (flags & REQ_FAILED) {
910 /*
911 * The request failed. Retry if it was due to a unit
912 * attention status (usually means media was changed).
913 */
914 struct request_sense *reqbuf = sense;
915
916 if (reqbuf->sense_key == UNIT_ATTENTION)
917 cdrom_saw_media_change(drive);
918 else if (reqbuf->sense_key == NOT_READY &&
919 reqbuf->asc == 4 && reqbuf->ascq != 4) {
920 /*
921 * The drive is in the process of loading
922 * a disk. Retry, but wait a little to give
923 * the drive time to complete the load.
924 */
925 ssleep(2);
926 } else {
927 /* otherwise, don't retry */
928 retries = 0;
929 }
930 --retries;
931 }
932
933 /* end of retry loop */
934 } while ((flags & REQ_FAILED) && retries >= 0);
935
936 /* return an error if the command failed */
937 return (flags & REQ_FAILED) ? -EIO : 0;
938 }
939
940 /*
941 * Called from blk_end_request_callback() after the data of the request is
942 * completed and before the request itself is completed. By returning value '1',
943 * blk_end_request_callback() returns immediately without completing it.
944 */
945 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
946 {
947 return 1;
948 }
949
950 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
951 {
952 ide_hwif_t *hwif = drive->hwif;
953 struct request *rq = HWGROUP(drive)->rq;
954 xfer_func_t *xferfunc;
955 ide_expiry_t *expiry = NULL;
956 int dma_error = 0, dma, stat, thislen, uptodate = 0;
957 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
958 unsigned int timeout;
959 u16 len;
960 u8 ireason;
961
962 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
963 __func__, rq->cmd[0], write);
964
965 /* check for errors */
966 dma = drive->dma;
967 if (dma) {
968 drive->dma = 0;
969 dma_error = hwif->dma_ops->dma_end(drive);
970 if (dma_error) {
971 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
972 write ? "write" : "read");
973 ide_dma_off(drive);
974 }
975 }
976
977 if (cdrom_decode_status(drive, 0, &stat))
978 return ide_stopped;
979
980 /* using dma, transfer is complete now */
981 if (dma) {
982 if (dma_error)
983 return ide_error(drive, "dma error", stat);
984 if (blk_fs_request(rq)) {
985 ide_end_request(drive, 1, rq->nr_sectors);
986 return ide_stopped;
987 }
988 goto end_request;
989 }
990
991 ide_read_bcount_and_ireason(drive, &len, &ireason);
992
993 thislen = blk_fs_request(rq) ? len : rq->data_len;
994 if (thislen > len)
995 thislen = len;
996
997 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
998 __func__, stat, thislen);
999
1000 /* If DRQ is clear, the command has completed. */
1001 if ((stat & ATA_DRQ) == 0) {
1002 if (blk_fs_request(rq)) {
1003 /*
1004 * If we're not done reading/writing, complain.
1005 * Otherwise, complete the command normally.
1006 */
1007 uptodate = 1;
1008 if (rq->current_nr_sectors > 0) {
1009 printk(KERN_ERR PFX "%s: %s: data underrun "
1010 "(%d blocks)\n",
1011 drive->name, __func__,
1012 rq->current_nr_sectors);
1013 if (!write)
1014 rq->cmd_flags |= REQ_FAILED;
1015 uptodate = 0;
1016 }
1017 cdrom_end_request(drive, uptodate);
1018 return ide_stopped;
1019 } else if (!blk_pc_request(rq)) {
1020 ide_cd_request_sense_fixup(drive, rq);
1021 /* complain if we still have data left to transfer */
1022 uptodate = rq->data_len ? 0 : 1;
1023 }
1024 goto end_request;
1025 }
1026
1027 /* check which way to transfer data */
1028 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
1029 return ide_stopped;
1030
1031 if (blk_fs_request(rq)) {
1032 if (write == 0) {
1033 int nskip;
1034
1035 if (ide_cd_check_transfer_size(drive, len)) {
1036 cdrom_end_request(drive, 0);
1037 return ide_stopped;
1038 }
1039
1040 /*
1041 * First, figure out if we need to bit-bucket
1042 * any of the leading sectors.
1043 */
1044 nskip = min_t(int, rq->current_nr_sectors
1045 - bio_cur_sectors(rq->bio),
1046 thislen >> 9);
1047 if (nskip > 0) {
1048 ide_pad_transfer(drive, write, nskip << 9);
1049 rq->current_nr_sectors -= nskip;
1050 thislen -= (nskip << 9);
1051 }
1052 }
1053 }
1054
1055 if (ireason == 0) {
1056 write = 1;
1057 xferfunc = hwif->tp_ops->output_data;
1058 } else {
1059 write = 0;
1060 xferfunc = hwif->tp_ops->input_data;
1061 }
1062
1063 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
1064 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
1065
1066 /* transfer data */
1067 while (thislen > 0) {
1068 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1069 int blen = rq->data_len;
1070
1071 /* bio backed? */
1072 if (rq->bio) {
1073 if (blk_fs_request(rq)) {
1074 ptr = rq->buffer;
1075 blen = rq->current_nr_sectors << 9;
1076 } else {
1077 ptr = bio_data(rq->bio);
1078 blen = bio_iovec(rq->bio)->bv_len;
1079 }
1080 }
1081
1082 if (!ptr) {
1083 if (blk_fs_request(rq) && !write)
1084 /*
1085 * If the buffers are full, pipe the rest into
1086 * oblivion.
1087 */
1088 ide_pad_transfer(drive, 0, thislen);
1089 else {
1090 printk(KERN_ERR PFX "%s: confused, missing data\n",
1091 drive->name);
1092 blk_dump_rq_flags(rq, rq_data_dir(rq)
1093 ? "cdrom_newpc_intr, write"
1094 : "cdrom_newpc_intr, read");
1095 }
1096 break;
1097 }
1098
1099 if (blen > thislen)
1100 blen = thislen;
1101
1102 xferfunc(drive, NULL, ptr, blen);
1103
1104 thislen -= blen;
1105 len -= blen;
1106
1107 if (blk_fs_request(rq)) {
1108 rq->buffer += blen;
1109 rq->nr_sectors -= (blen >> 9);
1110 rq->current_nr_sectors -= (blen >> 9);
1111 rq->sector += (blen >> 9);
1112
1113 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1114 cdrom_end_request(drive, 1);
1115 } else {
1116 rq->data_len -= blen;
1117
1118 /*
1119 * The request can't be completed until DRQ is cleared.
1120 * So complete the data, but don't complete the request
1121 * using the dummy function for the callback feature
1122 * of blk_end_request_callback().
1123 */
1124 if (rq->bio)
1125 blk_end_request_callback(rq, 0, blen,
1126 cdrom_newpc_intr_dummy_cb);
1127 else
1128 rq->data += blen;
1129 }
1130 if (!write && blk_sense_request(rq))
1131 rq->sense_len += blen;
1132 }
1133
1134 /* pad, if necessary */
1135 if (!blk_fs_request(rq) && len > 0)
1136 ide_pad_transfer(drive, write, len);
1137
1138 if (blk_pc_request(rq)) {
1139 timeout = rq->timeout;
1140 } else {
1141 timeout = ATAPI_WAIT_PC;
1142 if (!blk_fs_request(rq))
1143 expiry = cdrom_timer_expiry;
1144 }
1145
1146 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1147 return ide_started;
1148
1149 end_request:
1150 if (blk_pc_request(rq)) {
1151 unsigned long flags;
1152 unsigned int dlen = rq->data_len;
1153
1154 if (dma)
1155 rq->data_len = 0;
1156
1157 spin_lock_irqsave(&ide_lock, flags);
1158 if (__blk_end_request(rq, 0, dlen))
1159 BUG();
1160 HWGROUP(drive)->rq = NULL;
1161 spin_unlock_irqrestore(&ide_lock, flags);
1162 } else {
1163 if (!uptodate)
1164 rq->cmd_flags |= REQ_FAILED;
1165 cdrom_end_request(drive, uptodate);
1166 }
1167 return ide_stopped;
1168 }
1169
1170 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1171 {
1172 struct cdrom_info *cd = drive->driver_data;
1173 int write = rq_data_dir(rq) == WRITE;
1174 unsigned short sectors_per_frame =
1175 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1176
1177 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1178 "secs_per_frame: %u\n",
1179 __func__, rq->cmd[0], write, sectors_per_frame);
1180
1181 if (write) {
1182 /* disk has become write protected */
1183 if (get_disk_ro(cd->disk)) {
1184 cdrom_end_request(drive, 0);
1185 return ide_stopped;
1186 }
1187 } else {
1188 /*
1189 * We may be retrying this request after an error. Fix up any
1190 * weirdness which might be present in the request packet.
1191 */
1192 ide_cd_restore_request(drive, rq);
1193 }
1194
1195 /* use DMA, if possible / writes *must* be hardware frame aligned */
1196 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1197 (rq->sector & (sectors_per_frame - 1))) {
1198 if (write) {
1199 cdrom_end_request(drive, 0);
1200 return ide_stopped;
1201 }
1202 drive->dma = 0;
1203 } else
1204 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1205
1206 if (write)
1207 cd->devinfo.media_written = 1;
1208
1209 return ide_started;
1210 }
1211
1212 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1213 {
1214 struct request *rq = HWGROUP(drive)->rq;
1215
1216 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1217 }
1218
1219 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1220 {
1221
1222 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1223 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1224 rq->cmd_type);
1225
1226 if (blk_pc_request(rq))
1227 rq->cmd_flags |= REQ_QUIET;
1228 else
1229 rq->cmd_flags &= ~REQ_FAILED;
1230
1231 drive->dma = 0;
1232
1233 /* sg request */
1234 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1235 struct request_queue *q = drive->queue;
1236 unsigned int alignment;
1237 char *buf;
1238
1239 if (rq->bio)
1240 buf = bio_data(rq->bio);
1241 else
1242 buf = rq->data;
1243
1244 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1245
1246 /*
1247 * check if dma is safe
1248 *
1249 * NOTE! The "len" and "addr" checks should possibly have
1250 * separate masks.
1251 */
1252 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1253 if ((unsigned long)buf & alignment || rq->data_len & alignment
1254 || object_is_on_stack(buf))
1255 drive->dma = 0;
1256 }
1257 }
1258
1259 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1260 sector_t block)
1261 {
1262 struct cdrom_info *info = drive->driver_data;
1263 ide_handler_t *fn;
1264 int xferlen;
1265
1266 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1267 "rq->cmd_type: 0x%x, block: %llu\n",
1268 __func__, rq->cmd[0], rq->cmd_type,
1269 (unsigned long long)block);
1270
1271 if (blk_fs_request(rq)) {
1272 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1273 ide_hwif_t *hwif = drive->hwif;
1274 unsigned long elapsed = jiffies - info->start_seek;
1275 int stat = hwif->tp_ops->read_status(hwif);
1276
1277 if ((stat & ATA_DSC) != ATA_DSC) {
1278 if (elapsed < IDECD_SEEK_TIMEOUT) {
1279 ide_stall_queue(drive,
1280 IDECD_SEEK_TIMER);
1281 return ide_stopped;
1282 }
1283 printk(KERN_ERR PFX "%s: DSC timeout\n",
1284 drive->name);
1285 }
1286 drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1287 }
1288 if (rq_data_dir(rq) == READ &&
1289 IDE_LARGE_SEEK(info->last_block, block,
1290 IDECD_SEEK_THRESHOLD) &&
1291 (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) {
1292 xferlen = 0;
1293 fn = cdrom_start_seek_continuation;
1294
1295 drive->dma = 0;
1296 info->start_seek = jiffies;
1297
1298 ide_cd_prepare_seek_request(drive, rq);
1299 } else {
1300 xferlen = 32768;
1301 fn = cdrom_start_rw_cont;
1302
1303 if (cdrom_start_rw(drive, rq) == ide_stopped)
1304 return ide_stopped;
1305
1306 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1307 return ide_stopped;
1308 }
1309 info->last_block = block;
1310 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1311 rq->cmd_type == REQ_TYPE_ATA_PC) {
1312 xferlen = rq->data_len;
1313 fn = cdrom_do_newpc_cont;
1314
1315 if (!rq->timeout)
1316 rq->timeout = ATAPI_WAIT_PC;
1317
1318 cdrom_do_block_pc(drive, rq);
1319 } else if (blk_special_request(rq)) {
1320 /* right now this can only be a reset... */
1321 cdrom_end_request(drive, 1);
1322 return ide_stopped;
1323 } else {
1324 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1325 cdrom_end_request(drive, 0);
1326 return ide_stopped;
1327 }
1328
1329 return cdrom_start_packet_command(drive, xferlen, fn);
1330 }
1331
1332 /*
1333 * Ioctl handling.
1334 *
1335 * Routines which queue packet commands take as a final argument a pointer to a
1336 * request_sense struct. If execution of the command results in an error with a
1337 * CHECK CONDITION status, this structure will be filled with the results of the
1338 * subsequent request sense command. The pointer can also be NULL, in which case
1339 * no sense information is returned.
1340 */
1341 static void msf_from_bcd(struct atapi_msf *msf)
1342 {
1343 msf->minute = bcd2bin(msf->minute);
1344 msf->second = bcd2bin(msf->second);
1345 msf->frame = bcd2bin(msf->frame);
1346 }
1347
1348 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1349 {
1350 struct cdrom_info *info = drive->driver_data;
1351 struct cdrom_device_info *cdi = &info->devinfo;
1352 unsigned char cmd[BLK_MAX_CDB];
1353
1354 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1355
1356 memset(cmd, 0, BLK_MAX_CDB);
1357 cmd[0] = GPCMD_TEST_UNIT_READY;
1358
1359 /*
1360 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1361 * instead of supporting the LOAD_UNLOAD opcode.
1362 */
1363 cmd[7] = cdi->sanyo_slot % 3;
1364
1365 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1366 }
1367
1368 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1369 unsigned long *sectors_per_frame,
1370 struct request_sense *sense)
1371 {
1372 struct {
1373 __be32 lba;
1374 __be32 blocklen;
1375 } capbuf;
1376
1377 int stat;
1378 unsigned char cmd[BLK_MAX_CDB];
1379 unsigned len = sizeof(capbuf);
1380 u32 blocklen;
1381
1382 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1383
1384 memset(cmd, 0, BLK_MAX_CDB);
1385 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1386
1387 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1388 REQ_QUIET);
1389 if (stat)
1390 return stat;
1391
1392 /*
1393 * Sanity check the given block size
1394 */
1395 blocklen = be32_to_cpu(capbuf.blocklen);
1396 switch (blocklen) {
1397 case 512:
1398 case 1024:
1399 case 2048:
1400 case 4096:
1401 break;
1402 default:
1403 printk(KERN_ERR PFX "%s: weird block size %u\n",
1404 drive->name, blocklen);
1405 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1406 drive->name);
1407 blocklen = 2048;
1408 break;
1409 }
1410
1411 *capacity = 1 + be32_to_cpu(capbuf.lba);
1412 *sectors_per_frame = blocklen >> SECTOR_BITS;
1413
1414 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1415 __func__, *capacity, *sectors_per_frame);
1416
1417 return 0;
1418 }
1419
1420 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1421 int format, char *buf, int buflen,
1422 struct request_sense *sense)
1423 {
1424 unsigned char cmd[BLK_MAX_CDB];
1425
1426 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1427
1428 memset(cmd, 0, BLK_MAX_CDB);
1429
1430 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1431 cmd[6] = trackno;
1432 cmd[7] = (buflen >> 8);
1433 cmd[8] = (buflen & 0xff);
1434 cmd[9] = (format << 6);
1435
1436 if (msf_flag)
1437 cmd[1] = 2;
1438
1439 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1440 }
1441
1442 /* Try to read the entire TOC for the disk into our internal buffer. */
1443 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1444 {
1445 int stat, ntracks, i;
1446 struct cdrom_info *info = drive->driver_data;
1447 struct cdrom_device_info *cdi = &info->devinfo;
1448 struct atapi_toc *toc = info->toc;
1449 struct {
1450 struct atapi_toc_header hdr;
1451 struct atapi_toc_entry ent;
1452 } ms_tmp;
1453 long last_written;
1454 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1455
1456 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1457
1458 if (toc == NULL) {
1459 /* try to allocate space */
1460 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1461 if (toc == NULL) {
1462 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1463 drive->name);
1464 return -ENOMEM;
1465 }
1466 info->toc = toc;
1467 }
1468
1469 /*
1470 * Check to see if the existing data is still valid. If it is,
1471 * just return.
1472 */
1473 (void) cdrom_check_status(drive, sense);
1474
1475 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1476 return 0;
1477
1478 /* try to get the total cdrom capacity and sector size */
1479 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1480 sense);
1481 if (stat)
1482 toc->capacity = 0x1fffff;
1483
1484 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1485 /* save a private copy of the TOC capacity for error handling */
1486 drive->probed_capacity = toc->capacity * sectors_per_frame;
1487
1488 blk_queue_hardsect_size(drive->queue,
1489 sectors_per_frame << SECTOR_BITS);
1490
1491 /* first read just the header, so we know how long the TOC is */
1492 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1493 sizeof(struct atapi_toc_header), sense);
1494 if (stat)
1495 return stat;
1496
1497 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1498 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1499 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1500 }
1501
1502 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1503 if (ntracks <= 0)
1504 return -EIO;
1505 if (ntracks > MAX_TRACKS)
1506 ntracks = MAX_TRACKS;
1507
1508 /* now read the whole schmeer */
1509 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1510 (char *)&toc->hdr,
1511 sizeof(struct atapi_toc_header) +
1512 (ntracks + 1) *
1513 sizeof(struct atapi_toc_entry), sense);
1514
1515 if (stat && toc->hdr.first_track > 1) {
1516 /*
1517 * Cds with CDI tracks only don't have any TOC entries, despite
1518 * of this the returned values are
1519 * first_track == last_track = number of CDI tracks + 1,
1520 * so that this case is indistinguishable from the same layout
1521 * plus an additional audio track. If we get an error for the
1522 * regular case, we assume a CDI without additional audio
1523 * tracks. In this case the readable TOC is empty (CDI tracks
1524 * are not included) and only holds the Leadout entry.
1525 *
1526 * Heiko Eißfeldt.
1527 */
1528 ntracks = 0;
1529 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1530 (char *)&toc->hdr,
1531 sizeof(struct atapi_toc_header) +
1532 (ntracks + 1) *
1533 sizeof(struct atapi_toc_entry),
1534 sense);
1535 if (stat)
1536 return stat;
1537
1538 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1539 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1540 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1541 } else {
1542 toc->hdr.first_track = CDROM_LEADOUT;
1543 toc->hdr.last_track = CDROM_LEADOUT;
1544 }
1545 }
1546
1547 if (stat)
1548 return stat;
1549
1550 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1551
1552 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1553 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1554 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1555 }
1556
1557 for (i = 0; i <= ntracks; i++) {
1558 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1559 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1560 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1561 msf_from_bcd(&toc->ent[i].addr.msf);
1562 }
1563 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1564 toc->ent[i].addr.msf.second,
1565 toc->ent[i].addr.msf.frame);
1566 }
1567
1568 if (toc->hdr.first_track != CDROM_LEADOUT) {
1569 /* read the multisession information */
1570 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1571 sizeof(ms_tmp), sense);
1572 if (stat)
1573 return stat;
1574
1575 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1576 } else {
1577 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1578 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1579 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1580 }
1581
1582 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1583 /* re-read multisession information using MSF format */
1584 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1585 sizeof(ms_tmp), sense);
1586 if (stat)
1587 return stat;
1588
1589 msf_from_bcd(&ms_tmp.ent.addr.msf);
1590 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1591 ms_tmp.ent.addr.msf.second,
1592 ms_tmp.ent.addr.msf.frame);
1593 }
1594
1595 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1596
1597 /* now try to get the total cdrom capacity */
1598 stat = cdrom_get_last_written(cdi, &last_written);
1599 if (!stat && (last_written > toc->capacity)) {
1600 toc->capacity = last_written;
1601 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1602 drive->probed_capacity = toc->capacity * sectors_per_frame;
1603 }
1604
1605 /* Remember that we've read this stuff. */
1606 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1607
1608 return 0;
1609 }
1610
1611 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1612 {
1613 struct cdrom_info *info = drive->driver_data;
1614 struct cdrom_device_info *cdi = &info->devinfo;
1615 struct packet_command cgc;
1616 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1617
1618 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1619
1620 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1621 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1622
1623 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1624 do {
1625 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1626 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1627 if (!stat)
1628 break;
1629 } while (--attempts);
1630 return stat;
1631 }
1632
1633 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1634 {
1635 struct cdrom_info *cd = drive->driver_data;
1636 u16 curspeed, maxspeed;
1637
1638 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1639
1640 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1641 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1642 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1643 } else {
1644 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1645 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1646 }
1647
1648 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1649 __func__, curspeed, maxspeed);
1650
1651 cd->current_speed = (curspeed + (176/2)) / 176;
1652 cd->max_speed = (maxspeed + (176/2)) / 176;
1653 }
1654
1655 #define IDE_CD_CAPABILITIES \
1656 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1657 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1658 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1659 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1660 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1661
1662 static struct cdrom_device_ops ide_cdrom_dops = {
1663 .open = ide_cdrom_open_real,
1664 .release = ide_cdrom_release_real,
1665 .drive_status = ide_cdrom_drive_status,
1666 .media_changed = ide_cdrom_check_media_change_real,
1667 .tray_move = ide_cdrom_tray_move,
1668 .lock_door = ide_cdrom_lock_door,
1669 .select_speed = ide_cdrom_select_speed,
1670 .get_last_session = ide_cdrom_get_last_session,
1671 .get_mcn = ide_cdrom_get_mcn,
1672 .reset = ide_cdrom_reset,
1673 .audio_ioctl = ide_cdrom_audio_ioctl,
1674 .capability = IDE_CD_CAPABILITIES,
1675 .generic_packet = ide_cdrom_packet,
1676 };
1677
1678 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1679 {
1680 struct cdrom_info *info = drive->driver_data;
1681 struct cdrom_device_info *devinfo = &info->devinfo;
1682
1683 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1684
1685 devinfo->ops = &ide_cdrom_dops;
1686 devinfo->speed = info->current_speed;
1687 devinfo->capacity = nslots;
1688 devinfo->handle = drive;
1689 strcpy(devinfo->name, drive->name);
1690
1691 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1692 devinfo->mask |= CDC_SELECT_SPEED;
1693
1694 devinfo->disk = info->disk;
1695 return register_cdrom(devinfo);
1696 }
1697
1698 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1699 {
1700 struct cdrom_info *cd = drive->driver_data;
1701 struct cdrom_device_info *cdi = &cd->devinfo;
1702 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1703 mechtype_t mechtype;
1704 int nslots = 1;
1705
1706 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1707 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1708 drive->atapi_flags);
1709
1710 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1711 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1712 CDC_MO_DRIVE | CDC_RAM);
1713
1714 if (drive->media == ide_optical) {
1715 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1716 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1717 drive->name);
1718 return nslots;
1719 }
1720
1721 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1722 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1723 cdi->mask &= ~CDC_PLAY_AUDIO;
1724 return nslots;
1725 }
1726
1727 /*
1728 * We have to cheat a little here. the packet will eventually be queued
1729 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1730 * Since this device hasn't been registered with the Uniform layer yet,
1731 * it can't do this. Same goes for cdi->ops.
1732 */
1733 cdi->handle = drive;
1734 cdi->ops = &ide_cdrom_dops;
1735
1736 if (ide_cdrom_get_capabilities(drive, buf))
1737 return 0;
1738
1739 if ((buf[8 + 6] & 0x01) == 0)
1740 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1741 if (buf[8 + 6] & 0x08)
1742 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1743 if (buf[8 + 3] & 0x01)
1744 cdi->mask &= ~CDC_CD_R;
1745 if (buf[8 + 3] & 0x02)
1746 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1747 if (buf[8 + 2] & 0x38)
1748 cdi->mask &= ~CDC_DVD;
1749 if (buf[8 + 3] & 0x20)
1750 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1751 if (buf[8 + 3] & 0x10)
1752 cdi->mask &= ~CDC_DVD_R;
1753 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1754 cdi->mask &= ~CDC_PLAY_AUDIO;
1755
1756 mechtype = buf[8 + 6] >> 5;
1757 if (mechtype == mechtype_caddy ||
1758 mechtype == mechtype_popup ||
1759 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1760 cdi->mask |= CDC_CLOSE_TRAY;
1761
1762 if (cdi->sanyo_slot > 0) {
1763 cdi->mask &= ~CDC_SELECT_DISC;
1764 nslots = 3;
1765 } else if (mechtype == mechtype_individual_changer ||
1766 mechtype == mechtype_cartridge_changer) {
1767 nslots = cdrom_number_of_slots(cdi);
1768 if (nslots > 1)
1769 cdi->mask &= ~CDC_SELECT_DISC;
1770 }
1771
1772 ide_cdrom_update_speed(drive, buf);
1773
1774 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1775
1776 /* don't print speed if the drive reported 0 */
1777 if (cd->max_speed)
1778 printk(KERN_CONT " %dX", cd->max_speed);
1779
1780 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1781
1782 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1783 printk(KERN_CONT " DVD%s%s",
1784 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1785 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1786
1787 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1788 printk(KERN_CONT " CD%s%s",
1789 (cdi->mask & CDC_CD_R) ? "" : "-R",
1790 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1791
1792 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1793 printk(KERN_CONT " changer w/%d slots", nslots);
1794 else
1795 printk(KERN_CONT " drive");
1796
1797 printk(KERN_CONT ", %dkB Cache\n",
1798 be16_to_cpup((__be16 *)&buf[8 + 12]));
1799
1800 return nslots;
1801 }
1802
1803 /* standard prep_rq_fn that builds 10 byte cmds */
1804 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1805 {
1806 int hard_sect = queue_hardsect_size(q);
1807 long block = (long)rq->hard_sector / (hard_sect >> 9);
1808 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1809
1810 memset(rq->cmd, 0, BLK_MAX_CDB);
1811
1812 if (rq_data_dir(rq) == READ)
1813 rq->cmd[0] = GPCMD_READ_10;
1814 else
1815 rq->cmd[0] = GPCMD_WRITE_10;
1816
1817 /*
1818 * fill in lba
1819 */
1820 rq->cmd[2] = (block >> 24) & 0xff;
1821 rq->cmd[3] = (block >> 16) & 0xff;
1822 rq->cmd[4] = (block >> 8) & 0xff;
1823 rq->cmd[5] = block & 0xff;
1824
1825 /*
1826 * and transfer length
1827 */
1828 rq->cmd[7] = (blocks >> 8) & 0xff;
1829 rq->cmd[8] = blocks & 0xff;
1830 rq->cmd_len = 10;
1831 return BLKPREP_OK;
1832 }
1833
1834 /*
1835 * Most of the SCSI commands are supported directly by ATAPI devices.
1836 * This transform handles the few exceptions.
1837 */
1838 static int ide_cdrom_prep_pc(struct request *rq)
1839 {
1840 u8 *c = rq->cmd;
1841
1842 /* transform 6-byte read/write commands to the 10-byte version */
1843 if (c[0] == READ_6 || c[0] == WRITE_6) {
1844 c[8] = c[4];
1845 c[5] = c[3];
1846 c[4] = c[2];
1847 c[3] = c[1] & 0x1f;
1848 c[2] = 0;
1849 c[1] &= 0xe0;
1850 c[0] += (READ_10 - READ_6);
1851 rq->cmd_len = 10;
1852 return BLKPREP_OK;
1853 }
1854
1855 /*
1856 * it's silly to pretend we understand 6-byte sense commands, just
1857 * reject with ILLEGAL_REQUEST and the caller should take the
1858 * appropriate action
1859 */
1860 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1861 rq->errors = ILLEGAL_REQUEST;
1862 return BLKPREP_KILL;
1863 }
1864
1865 return BLKPREP_OK;
1866 }
1867
1868 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1869 {
1870 if (blk_fs_request(rq))
1871 return ide_cdrom_prep_fs(q, rq);
1872 else if (blk_pc_request(rq))
1873 return ide_cdrom_prep_pc(rq);
1874
1875 return 0;
1876 }
1877
1878 struct cd_list_entry {
1879 const char *id_model;
1880 const char *id_firmware;
1881 unsigned int cd_flags;
1882 };
1883
1884 #ifdef CONFIG_IDE_PROC_FS
1885 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1886 {
1887 unsigned long capacity, sectors_per_frame;
1888
1889 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1890 return 0;
1891
1892 return capacity * sectors_per_frame;
1893 }
1894
1895 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1896 int count, int *eof, void *data)
1897 {
1898 ide_drive_t *drive = data;
1899 int len;
1900
1901 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1902 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1903 }
1904
1905 static ide_proc_entry_t idecd_proc[] = {
1906 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1907 { NULL, 0, NULL, NULL }
1908 };
1909
1910 ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
1911
1912 static const struct ide_proc_devset idecd_settings[] = {
1913 IDE_PROC_DEVSET(dsc_overlap, 0, 1),
1914 { 0 },
1915 };
1916
1917 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1918 {
1919 return idecd_proc;
1920 }
1921
1922 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1923 {
1924 return idecd_settings;
1925 }
1926 #endif
1927
1928 static const struct cd_list_entry ide_cd_quirks_list[] = {
1929 /* Limit transfer size per interrupt. */
1930 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1931 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1932 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1933 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1934 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1935 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1936 IDE_AFLAG_PRE_ATAPI12, },
1937 /* Vertos 300, some versions of this drive like to talk BCD. */
1938 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1939 /* Vertos 600 ESD. */
1940 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1941 /*
1942 * Sanyo 3 CD changer uses a non-standard command for CD changing
1943 * (by default standard ATAPI support for CD changers is used).
1944 */
1945 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1946 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1947 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1948 /* Stingray 8X CD-ROM. */
1949 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1950 /*
1951 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1952 * mode sense page capabilities size, but older drives break.
1953 */
1954 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1955 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1956 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1957 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1958 /*
1959 * Some drives used by Apple don't advertise audio play
1960 * but they do support reading TOC & audio datas.
1961 */
1962 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1963 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1964 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1965 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1966 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1967 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1968 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1969 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1970 { NULL, NULL, 0 }
1971 };
1972
1973 static unsigned int ide_cd_flags(u16 *id)
1974 {
1975 const struct cd_list_entry *cle = ide_cd_quirks_list;
1976
1977 while (cle->id_model) {
1978 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1979 (cle->id_firmware == NULL ||
1980 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1981 return cle->cd_flags;
1982 cle++;
1983 }
1984
1985 return 0;
1986 }
1987
1988 static int ide_cdrom_setup(ide_drive_t *drive)
1989 {
1990 struct cdrom_info *cd = drive->driver_data;
1991 struct cdrom_device_info *cdi = &cd->devinfo;
1992 u16 *id = drive->id;
1993 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1994 int nslots;
1995
1996 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1997
1998 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1999 blk_queue_dma_alignment(drive->queue, 31);
2000 blk_queue_update_dma_pad(drive->queue, 15);
2001 drive->queue->unplug_delay = (1 * HZ) / 1000;
2002 if (!drive->queue->unplug_delay)
2003 drive->queue->unplug_delay = 1;
2004
2005 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
2006 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
2007
2008 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
2009 fw_rev[4] == '1' && fw_rev[6] <= '2')
2010 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
2011 IDE_AFLAG_TOCADDR_AS_BCD);
2012 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
2013 fw_rev[4] == '1' && fw_rev[6] <= '2')
2014 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
2015 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
2016 /* 3 => use CD in slot 0 */
2017 cdi->sanyo_slot = 3;
2018
2019 nslots = ide_cdrom_probe_capabilities(drive);
2020
2021 /* set correct block size */
2022 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
2023
2024 if (drive->next != drive)
2025 drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
2026 else
2027 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
2028
2029 if (ide_cdrom_register(drive, nslots)) {
2030 printk(KERN_ERR PFX "%s: %s failed to register device with the"
2031 " cdrom driver.\n", drive->name, __func__);
2032 cd->devinfo.handle = NULL;
2033 return 1;
2034 }
2035
2036 ide_proc_register_driver(drive, cd->driver);
2037 return 0;
2038 }
2039
2040 static void ide_cd_remove(ide_drive_t *drive)
2041 {
2042 struct cdrom_info *info = drive->driver_data;
2043
2044 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
2045
2046 ide_proc_unregister_driver(drive, info->driver);
2047
2048 del_gendisk(info->disk);
2049
2050 ide_cd_put(info);
2051 }
2052
2053 static void ide_cd_release(struct kref *kref)
2054 {
2055 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
2056 struct cdrom_device_info *devinfo = &info->devinfo;
2057 ide_drive_t *drive = info->drive;
2058 struct gendisk *g = info->disk;
2059
2060 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
2061
2062 kfree(info->toc);
2063 if (devinfo->handle == drive)
2064 unregister_cdrom(devinfo);
2065 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
2066 drive->driver_data = NULL;
2067 blk_queue_prep_rq(drive->queue, NULL);
2068 g->private_data = NULL;
2069 put_disk(g);
2070 kfree(info);
2071 }
2072
2073 static int ide_cd_probe(ide_drive_t *);
2074
2075 static ide_driver_t ide_cdrom_driver = {
2076 .gen_driver = {
2077 .owner = THIS_MODULE,
2078 .name = "ide-cdrom",
2079 .bus = &ide_bus_type,
2080 },
2081 .probe = ide_cd_probe,
2082 .remove = ide_cd_remove,
2083 .version = IDECD_VERSION,
2084 .do_request = ide_cd_do_request,
2085 .end_request = ide_end_request,
2086 .error = __ide_error,
2087 #ifdef CONFIG_IDE_PROC_FS
2088 .proc_entries = ide_cd_proc_entries,
2089 .proc_devsets = ide_cd_proc_devsets,
2090 #endif
2091 };
2092
2093 static int idecd_open(struct block_device *bdev, fmode_t mode)
2094 {
2095 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
2096 int rc = -ENOMEM;
2097
2098 if (!info)
2099 return -ENXIO;
2100
2101 rc = cdrom_open(&info->devinfo, bdev, mode);
2102
2103 if (rc < 0)
2104 ide_cd_put(info);
2105
2106 return rc;
2107 }
2108
2109 static int idecd_release(struct gendisk *disk, fmode_t mode)
2110 {
2111 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2112
2113 cdrom_release(&info->devinfo, mode);
2114
2115 ide_cd_put(info);
2116
2117 return 0;
2118 }
2119
2120 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2121 {
2122 struct packet_command cgc;
2123 char buffer[16];
2124 int stat;
2125 char spindown;
2126
2127 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2128 return -EFAULT;
2129
2130 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2131
2132 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2133 if (stat)
2134 return stat;
2135
2136 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2137 return cdrom_mode_select(cdi, &cgc);
2138 }
2139
2140 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2141 {
2142 struct packet_command cgc;
2143 char buffer[16];
2144 int stat;
2145 char spindown;
2146
2147 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2148
2149 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2150 if (stat)
2151 return stat;
2152
2153 spindown = buffer[11] & 0x0f;
2154 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2155 return -EFAULT;
2156 return 0;
2157 }
2158
2159 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2160 unsigned int cmd, unsigned long arg)
2161 {
2162 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2163 int err;
2164
2165 switch (cmd) {
2166 case CDROMSETSPINDOWN:
2167 return idecd_set_spindown(&info->devinfo, arg);
2168 case CDROMGETSPINDOWN:
2169 return idecd_get_spindown(&info->devinfo, arg);
2170 default:
2171 break;
2172 }
2173
2174 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2175 if (err == -EINVAL)
2176 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2177
2178 return err;
2179 }
2180
2181 static int idecd_media_changed(struct gendisk *disk)
2182 {
2183 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2184 return cdrom_media_changed(&info->devinfo);
2185 }
2186
2187 static int idecd_revalidate_disk(struct gendisk *disk)
2188 {
2189 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2190 struct request_sense sense;
2191
2192 ide_cd_read_toc(info->drive, &sense);
2193
2194 return 0;
2195 }
2196
2197 static struct block_device_operations idecd_ops = {
2198 .owner = THIS_MODULE,
2199 .open = idecd_open,
2200 .release = idecd_release,
2201 .locked_ioctl = idecd_ioctl,
2202 .media_changed = idecd_media_changed,
2203 .revalidate_disk = idecd_revalidate_disk
2204 };
2205
2206 /* module options */
2207 static char *ignore;
2208 module_param(ignore, charp, 0400);
2209
2210 static unsigned long debug_mask;
2211 module_param(debug_mask, ulong, 0644);
2212
2213 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2214
2215 static int ide_cd_probe(ide_drive_t *drive)
2216 {
2217 struct cdrom_info *info;
2218 struct gendisk *g;
2219 struct request_sense sense;
2220
2221 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2222 "drive->media: 0x%x\n", __func__, drive->driver_req,
2223 drive->media);
2224
2225 if (!strstr("ide-cdrom", drive->driver_req))
2226 goto failed;
2227
2228 if (drive->media != ide_cdrom && drive->media != ide_optical)
2229 goto failed;
2230
2231 /* skip drives that we were told to ignore */
2232 if (ignore != NULL) {
2233 if (strstr(ignore, drive->name)) {
2234 printk(KERN_INFO PFX "ignoring drive %s\n",
2235 drive->name);
2236 goto failed;
2237 }
2238 }
2239
2240 drive->debug_mask = debug_mask;
2241
2242 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2243 if (info == NULL) {
2244 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2245 drive->name);
2246 goto failed;
2247 }
2248
2249 g = alloc_disk(1 << PARTN_BITS);
2250 if (!g)
2251 goto out_free_cd;
2252
2253 ide_init_disk(g, drive);
2254
2255 kref_init(&info->kref);
2256
2257 info->drive = drive;
2258 info->driver = &ide_cdrom_driver;
2259 info->disk = g;
2260
2261 g->private_data = &info->driver;
2262
2263 drive->driver_data = info;
2264
2265 g->minors = 1;
2266 g->driverfs_dev = &drive->gendev;
2267 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2268 if (ide_cdrom_setup(drive)) {
2269 ide_cd_release(&info->kref);
2270 goto failed;
2271 }
2272
2273 ide_cd_read_toc(drive, &sense);
2274 g->fops = &idecd_ops;
2275 g->flags |= GENHD_FL_REMOVABLE;
2276 add_disk(g);
2277 return 0;
2278
2279 out_free_cd:
2280 kfree(info);
2281 failed:
2282 return -ENODEV;
2283 }
2284
2285 static void __exit ide_cdrom_exit(void)
2286 {
2287 driver_unregister(&ide_cdrom_driver.gen_driver);
2288 }
2289
2290 static int __init ide_cdrom_init(void)
2291 {
2292 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2293 return driver_register(&ide_cdrom_driver.gen_driver);
2294 }
2295
2296 MODULE_ALIAS("ide:*m-cdrom*");
2297 MODULE_ALIAS("ide-cd");
2298 module_init(ide_cdrom_init);
2299 module_exit(ide_cdrom_exit);
2300 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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