?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
remove blk_register_filter and blk_unregister_filter in gendisk
[linux-2.6/mini2440.git] / drivers / ide / ide-cd.c
blobf1489999cf916a53f222a9c71d9e518be9f69c20
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 IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
56
57 #define ide_cd_g(disk) \
58 container_of((disk)->private_data, struct cdrom_info, driver)
59
60 static void ide_cd_release(struct kref *);
61
62 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
63 {
64 struct cdrom_info *cd = NULL;
65
66 mutex_lock(&idecd_ref_mutex);
67 cd = ide_cd_g(disk);
68 if (cd) {
69 if (ide_device_get(cd->drive))
70 cd = NULL;
71 else
72 kref_get(&cd->kref);
73
74 }
75 mutex_unlock(&idecd_ref_mutex);
76 return cd;
77 }
78
79 static void ide_cd_put(struct cdrom_info *cd)
80 {
81 ide_drive_t *drive = cd->drive;
82
83 mutex_lock(&idecd_ref_mutex);
84 kref_put(&cd->kref, ide_cd_release);
85 ide_device_put(drive);
86 mutex_unlock(&idecd_ref_mutex);
87 }
88
89 /*
90 * Generic packet command support and error handling routines.
91 */
92
93 /* Mark that we've seen a media change and invalidate our internal buffers. */
94 static void cdrom_saw_media_change(ide_drive_t *drive)
95 {
96 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
97 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
98 }
99
100 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
101 struct request_sense *sense)
102 {
103 int log = 0;
104
105 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
106 return 0;
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 (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
145 static void cdrom_analyze_sense_data(ide_drive_t *drive,
146 struct request *failed_command,
147 struct request_sense *sense)
148 {
149 unsigned long sector;
150 unsigned long bio_sectors;
151 struct cdrom_info *info = drive->driver_data;
152
153 if (!cdrom_log_sense(drive, failed_command, sense))
154 return;
155
156 /*
157 * If a read toc is executed for a CD-R or CD-RW medium where the first
158 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
159 * confusing error)
160 */
161 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
162 if (sense->sense_key == 0x05 && sense->asc == 0x24)
163 return;
164
165 /* current error */
166 if (sense->error_code == 0x70) {
167 switch (sense->sense_key) {
168 case MEDIUM_ERROR:
169 case VOLUME_OVERFLOW:
170 case ILLEGAL_REQUEST:
171 if (!sense->valid)
172 break;
173 if (failed_command == NULL ||
174 !blk_fs_request(failed_command))
175 break;
176 sector = (sense->information[0] << 24) |
177 (sense->information[1] << 16) |
178 (sense->information[2] << 8) |
179 (sense->information[3]);
180
181 if (drive->queue->hardsect_size == 2048)
182 /* device sector size is 2K */
183 sector <<= 2;
184
185 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
186 sector &= ~(bio_sectors - 1);
187
188 if (sector < get_capacity(info->disk) &&
189 drive->probed_capacity - sector < 4 * 75)
190 set_capacity(info->disk, sector);
191 }
192 }
193
194 ide_cd_log_error(drive->name, failed_command, sense);
195 }
196
197 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
198 struct request *failed_command)
199 {
200 struct cdrom_info *info = drive->driver_data;
201 struct request *rq = &info->request_sense_request;
202
203 if (sense == NULL)
204 sense = &info->sense_data;
205
206 /* stuff the sense request in front of our current request */
207 blk_rq_init(NULL, rq);
208 rq->cmd_type = REQ_TYPE_ATA_PC;
209 rq->rq_disk = info->disk;
210
211 rq->data = sense;
212 rq->cmd[0] = GPCMD_REQUEST_SENSE;
213 rq->cmd[4] = 18;
214 rq->data_len = 18;
215
216 rq->cmd_type = REQ_TYPE_SENSE;
217 rq->cmd_flags |= REQ_PREEMPT;
218
219 /* NOTE! Save the failed command in "rq->buffer" */
220 rq->buffer = (void *) failed_command;
221
222 ide_do_drive_cmd(drive, rq);
223 }
224
225 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
226 {
227 struct request *rq = HWGROUP(drive)->rq;
228 int nsectors = rq->hard_cur_sectors;
229
230 if (blk_sense_request(rq) && uptodate) {
231 /*
232 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
233 * failed request
234 */
235 struct request *failed = (struct request *) rq->buffer;
236 struct cdrom_info *info = drive->driver_data;
237 void *sense = &info->sense_data;
238 unsigned long flags;
239
240 if (failed) {
241 if (failed->sense) {
242 sense = failed->sense;
243 failed->sense_len = rq->sense_len;
244 }
245 cdrom_analyze_sense_data(drive, failed, sense);
246 /*
247 * now end the failed request
248 */
249 if (blk_fs_request(failed)) {
250 if (ide_end_dequeued_request(drive, failed, 0,
251 failed->hard_nr_sectors))
252 BUG();
253 } else {
254 spin_lock_irqsave(&ide_lock, flags);
255 if (__blk_end_request(failed, -EIO,
256 failed->data_len))
257 BUG();
258 spin_unlock_irqrestore(&ide_lock, flags);
259 }
260 } else
261 cdrom_analyze_sense_data(drive, NULL, sense);
262 }
263
264 if (!rq->current_nr_sectors && blk_fs_request(rq))
265 uptodate = 1;
266 /* make sure it's fully ended */
267 if (blk_pc_request(rq))
268 nsectors = (rq->data_len + 511) >> 9;
269 if (!nsectors)
270 nsectors = 1;
271
272 ide_end_request(drive, uptodate, nsectors);
273 }
274
275 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
276 {
277 if (st & 0x80)
278 return;
279 ide_dump_status(drive, msg, st);
280 }
281
282 /*
283 * Returns:
284 * 0: if the request should be continued.
285 * 1: if the request was ended.
286 */
287 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
288 {
289 ide_hwif_t *hwif = drive->hwif;
290 struct request *rq = hwif->hwgroup->rq;
291 int stat, err, sense_key;
292
293 /* check for errors */
294 stat = hwif->tp_ops->read_status(hwif);
295
296 if (stat_ret)
297 *stat_ret = stat;
298
299 if (OK_STAT(stat, good_stat, BAD_R_STAT))
300 return 0;
301
302 /* get the IDE error register */
303 err = ide_read_error(drive);
304 sense_key = err >> 4;
305
306 if (rq == NULL) {
307 printk(KERN_ERR "%s: missing rq in %s\n",
308 drive->name, __func__);
309 return 1;
310 }
311
312 if (blk_sense_request(rq)) {
313 /*
314 * We got an error trying to get sense info from the drive
315 * (probably while trying to recover from a former error).
316 * Just give up.
317 */
318 rq->cmd_flags |= REQ_FAILED;
319 cdrom_end_request(drive, 0);
320 ide_error(drive, "request sense failure", stat);
321 return 1;
322
323 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
324 /* All other functions, except for READ. */
325
326 /*
327 * if we have an error, pass back CHECK_CONDITION as the
328 * scsi status byte
329 */
330 if (blk_pc_request(rq) && !rq->errors)
331 rq->errors = SAM_STAT_CHECK_CONDITION;
332
333 /* check for tray open */
334 if (sense_key == NOT_READY) {
335 cdrom_saw_media_change(drive);
336 } else if (sense_key == UNIT_ATTENTION) {
337 /* check for media change */
338 cdrom_saw_media_change(drive);
339 return 0;
340 } else if (sense_key == ILLEGAL_REQUEST &&
341 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
342 /*
343 * Don't print error message for this condition--
344 * SFF8090i indicates that 5/24/00 is the correct
345 * response to a request to close the tray if the
346 * drive doesn't have that capability.
347 * cdrom_log_sense() knows this!
348 */
349 } else if (!(rq->cmd_flags & REQ_QUIET)) {
350 /* otherwise, print an error */
351 ide_dump_status(drive, "packet command error", stat);
352 }
353
354 rq->cmd_flags |= REQ_FAILED;
355
356 /*
357 * instead of playing games with moving completions around,
358 * remove failed request completely and end it when the
359 * request sense has completed
360 */
361 goto end_request;
362
363 } else if (blk_fs_request(rq)) {
364 int do_end_request = 0;
365
366 /* handle errors from READ and WRITE requests */
367
368 if (blk_noretry_request(rq))
369 do_end_request = 1;
370
371 if (sense_key == NOT_READY) {
372 /* tray open */
373 if (rq_data_dir(rq) == READ) {
374 cdrom_saw_media_change(drive);
375
376 /* fail the request */
377 printk(KERN_ERR "%s: tray open\n", drive->name);
378 do_end_request = 1;
379 } else {
380 struct cdrom_info *info = drive->driver_data;
381
382 /*
383 * Allow the drive 5 seconds to recover, some
384 * devices will return this error while flushing
385 * data from cache.
386 */
387 if (!rq->errors)
388 info->write_timeout = jiffies +
389 ATAPI_WAIT_WRITE_BUSY;
390 rq->errors = 1;
391 if (time_after(jiffies, info->write_timeout))
392 do_end_request = 1;
393 else {
394 unsigned long flags;
395
396 /*
397 * take a breather relying on the unplug
398 * timer to kick us again
399 */
400 spin_lock_irqsave(&ide_lock, flags);
401 blk_plug_device(drive->queue);
402 spin_unlock_irqrestore(&ide_lock,
403 flags);
404 return 1;
405 }
406 }
407 } else if (sense_key == UNIT_ATTENTION) {
408 /* media change */
409 cdrom_saw_media_change(drive);
410
411 /*
412 * Arrange to retry the request but be sure to give up
413 * if we've retried too many times.
414 */
415 if (++rq->errors > ERROR_MAX)
416 do_end_request = 1;
417 } else if (sense_key == ILLEGAL_REQUEST ||
418 sense_key == DATA_PROTECT) {
419 /*
420 * No point in retrying after an illegal request or data
421 * protect error.
422 */
423 ide_dump_status_no_sense(drive, "command error", stat);
424 do_end_request = 1;
425 } else if (sense_key == MEDIUM_ERROR) {
426 /*
427 * No point in re-trying a zillion times on a bad
428 * sector. If we got here the error is not correctable.
429 */
430 ide_dump_status_no_sense(drive,
431 "media error (bad sector)",
432 stat);
433 do_end_request = 1;
434 } else if (sense_key == BLANK_CHECK) {
435 /* disk appears blank ?? */
436 ide_dump_status_no_sense(drive, "media error (blank)",
437 stat);
438 do_end_request = 1;
439 } else if ((err & ~ABRT_ERR) != 0) {
440 /* go to the default handler for other errors */
441 ide_error(drive, "cdrom_decode_status", stat);
442 return 1;
443 } else if ((++rq->errors > ERROR_MAX)) {
444 /* we've racked up too many retries, abort */
445 do_end_request = 1;
446 }
447
448 /*
449 * End a request through request sense analysis when we have
450 * sense data. We need this in order to perform end of media
451 * processing.
452 */
453 if (do_end_request)
454 goto end_request;
455
456 /*
457 * If we got a CHECK_CONDITION status, queue
458 * a request sense command.
459 */
460 if (stat & ERR_STAT)
461 cdrom_queue_request_sense(drive, NULL, NULL);
462 } else {
463 blk_dump_rq_flags(rq, "ide-cd: bad rq");
464 cdrom_end_request(drive, 0);
465 }
466
467 /* retry, or handle the next request */
468 return 1;
469
470 end_request:
471 if (stat & ERR_STAT) {
472 unsigned long flags;
473
474 spin_lock_irqsave(&ide_lock, flags);
475 blkdev_dequeue_request(rq);
476 HWGROUP(drive)->rq = NULL;
477 spin_unlock_irqrestore(&ide_lock, flags);
478
479 cdrom_queue_request_sense(drive, rq->sense, rq);
480 } else
481 cdrom_end_request(drive, 0);
482
483 return 1;
484 }
485
486 static int cdrom_timer_expiry(ide_drive_t *drive)
487 {
488 struct request *rq = HWGROUP(drive)->rq;
489 unsigned long wait = 0;
490
491 /*
492 * Some commands are *slow* and normally take a long time to complete.
493 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
494 * commands/drives support that. Let ide_timer_expiry keep polling us
495 * for these.
496 */
497 switch (rq->cmd[0]) {
498 case GPCMD_BLANK:
499 case GPCMD_FORMAT_UNIT:
500 case GPCMD_RESERVE_RZONE_TRACK:
501 case GPCMD_CLOSE_TRACK:
502 case GPCMD_FLUSH_CACHE:
503 wait = ATAPI_WAIT_PC;
504 break;
505 default:
506 if (!(rq->cmd_flags & REQ_QUIET))
507 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
508 rq->cmd[0]);
509 wait = 0;
510 break;
511 }
512 return wait;
513 }
514
515 /*
516 * Set up the device registers for transferring a packet command on DEV,
517 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
518 * which actually transfers the command to the drive. If this is a
519 * drq_interrupt device, this routine will arrange for HANDLER to be
520 * called when the interrupt from the drive arrives. Otherwise, HANDLER
521 * will be called immediately after the drive is prepared for the transfer.
522 */
523 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
524 int xferlen,
525 ide_handler_t *handler)
526 {
527 struct cdrom_info *info = drive->driver_data;
528 ide_hwif_t *hwif = drive->hwif;
529
530 /* FIXME: for Virtual DMA we must check harder */
531 if (info->dma)
532 info->dma = !hwif->dma_ops->dma_setup(drive);
533
534 /* set up the controller registers */
535 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
536 xferlen, info->dma);
537
538 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
539 /* waiting for CDB interrupt, not DMA yet. */
540 if (info->dma)
541 drive->waiting_for_dma = 0;
542
543 /* packet command */
544 ide_execute_command(drive, WIN_PACKETCMD, handler,
545 ATAPI_WAIT_PC, cdrom_timer_expiry);
546 return ide_started;
547 } else {
548 ide_execute_pkt_cmd(drive);
549
550 return (*handler) (drive);
551 }
552 }
553
554 /*
555 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
556 * registers must have already been prepared by cdrom_start_packet_command.
557 * HANDLER is the interrupt handler to call when the command completes or
558 * there's data ready.
559 */
560 #define ATAPI_MIN_CDB_BYTES 12
561 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
562 struct request *rq,
563 ide_handler_t *handler)
564 {
565 ide_hwif_t *hwif = drive->hwif;
566 int cmd_len;
567 struct cdrom_info *info = drive->driver_data;
568 ide_startstop_t startstop;
569
570 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
571 /*
572 * Here we should have been called after receiving an interrupt
573 * from the device. DRQ should how be set.
574 */
575
576 /* check for errors */
577 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
578 return ide_stopped;
579
580 /* ok, next interrupt will be DMA interrupt */
581 if (info->dma)
582 drive->waiting_for_dma = 1;
583 } else {
584 /* otherwise, we must wait for DRQ to get set */
585 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
586 BUSY_STAT, WAIT_READY))
587 return startstop;
588 }
589
590 /* arm the interrupt handler */
591 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
592
593 /* ATAPI commands get padded out to 12 bytes minimum */
594 cmd_len = COMMAND_SIZE(rq->cmd[0]);
595 if (cmd_len < ATAPI_MIN_CDB_BYTES)
596 cmd_len = ATAPI_MIN_CDB_BYTES;
597
598 /* send the command to the device */
599 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
600
601 /* start the DMA if need be */
602 if (info->dma)
603 hwif->dma_ops->dma_start(drive);
604
605 return ide_started;
606 }
607
608 /*
609 * Check the contents of the interrupt reason register from the cdrom
610 * and attempt to recover if there are problems. Returns 0 if everything's
611 * ok; nonzero if the request has been terminated.
612 */
613 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
614 int len, int ireason, int rw)
615 {
616 ide_hwif_t *hwif = drive->hwif;
617
618 /*
619 * ireason == 0: the drive wants to receive data from us
620 * ireason == 2: the drive is expecting to transfer data to us
621 */
622 if (ireason == (!rw << 1))
623 return 0;
624 else if (ireason == (rw << 1)) {
625
626 /* whoops... */
627 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
628 drive->name, __func__);
629
630 ide_pad_transfer(drive, rw, len);
631 } else if (rw == 0 && ireason == 1) {
632 /*
633 * Some drives (ASUS) seem to tell us that status info is
634 * available. Just get it and ignore.
635 */
636 (void)hwif->tp_ops->read_status(hwif);
637 return 0;
638 } else {
639 /* drive wants a command packet, or invalid ireason... */
640 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
641 drive->name, __func__, ireason);
642 }
643
644 if (rq->cmd_type == REQ_TYPE_ATA_PC)
645 rq->cmd_flags |= REQ_FAILED;
646
647 cdrom_end_request(drive, 0);
648 return -1;
649 }
650
651 /*
652 * Assume that the drive will always provide data in multiples of at least
653 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
654 */
655 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
656 {
657 if ((len % SECTOR_SIZE) == 0)
658 return 0;
659
660 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
661 drive->name, __func__, len);
662
663 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
664 printk(KERN_ERR " This drive is not supported by "
665 "this version of the driver\n");
666 else {
667 printk(KERN_ERR " Trying to limit transfer sizes\n");
668 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
669 }
670
671 return 1;
672 }
673
674 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
675
676 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
677 struct request *rq)
678 {
679 if (rq_data_dir(rq) == READ) {
680 unsigned short sectors_per_frame =
681 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
682 int nskip = rq->sector & (sectors_per_frame - 1);
683
684 /*
685 * If the requested sector doesn't start on a frame boundary,
686 * we must adjust the start of the transfer so that it does,
687 * and remember to skip the first few sectors.
688 *
689 * If the rq->current_nr_sectors field is larger than the size
690 * of the buffer, it will mean that we're to skip a number of
691 * sectors equal to the amount by which rq->current_nr_sectors
692 * is larger than the buffer size.
693 */
694 if (nskip > 0) {
695 /* sanity check... */
696 if (rq->current_nr_sectors !=
697 bio_cur_sectors(rq->bio)) {
698 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
699 drive->name, __func__,
700 rq->current_nr_sectors);
701 cdrom_end_request(drive, 0);
702 return ide_stopped;
703 }
704 rq->current_nr_sectors += nskip;
705 }
706 }
707 #if 0
708 else
709 /* the immediate bit */
710 rq->cmd[1] = 1 << 3;
711 #endif
712 /* set up the command */
713 rq->timeout = ATAPI_WAIT_PC;
714
715 return ide_started;
716 }
717
718 /*
719 * Routine to send a read/write packet command to the drive. This is usually
720 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
721 * devices, it is called from an interrupt when the drive is ready to accept
722 * the command.
723 */
724 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
725 {
726 struct request *rq = drive->hwif->hwgroup->rq;
727
728 /* send the command to the drive and return */
729 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
730 }
731
732 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
733 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
734 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
735
736 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
737 {
738 struct cdrom_info *info = drive->driver_data;
739 int stat;
740 static int retry = 10;
741
742 if (cdrom_decode_status(drive, 0, &stat))
743 return ide_stopped;
744
745 drive->atapi_flags |= IDE_AFLAG_SEEKING;
746
747 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
748 if (--retry == 0)
749 drive->dsc_overlap = 0;
750 }
751 return ide_stopped;
752 }
753
754 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
755 {
756 sector_t frame = rq->sector;
757
758 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
759
760 memset(rq->cmd, 0, BLK_MAX_CDB);
761 rq->cmd[0] = GPCMD_SEEK;
762 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
763
764 rq->timeout = ATAPI_WAIT_PC;
765 }
766
767 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
768 {
769 struct request *rq = drive->hwif->hwgroup->rq;
770
771 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
772 }
773
774 /*
775 * Fix up a possibly partially-processed request so that we can start it over
776 * entirely, or even put it back on the request queue.
777 */
778 static void restore_request(struct request *rq)
779 {
780 if (rq->buffer != bio_data(rq->bio)) {
781 sector_t n =
782 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
783
784 rq->buffer = bio_data(rq->bio);
785 rq->nr_sectors += n;
786 rq->sector -= n;
787 }
788 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
789 rq->hard_cur_sectors = rq->current_nr_sectors;
790 rq->hard_nr_sectors = rq->nr_sectors;
791 rq->hard_sector = rq->sector;
792 rq->q->prep_rq_fn(rq->q, rq);
793 }
794
795 /*
796 * All other packet commands.
797 */
798 static void ide_cd_request_sense_fixup(struct request *rq)
799 {
800 /*
801 * Some of the trailing request sense fields are optional,
802 * and some drives don't send them. Sigh.
803 */
804 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
805 rq->data_len > 0 && rq->data_len <= 5)
806 while (rq->data_len > 0) {
807 *(u8 *)rq->data++ = 0;
808 --rq->data_len;
809 }
810 }
811
812 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
813 int write, void *buffer, unsigned *bufflen,
814 struct request_sense *sense, int timeout,
815 unsigned int cmd_flags)
816 {
817 struct cdrom_info *info = drive->driver_data;
818 struct request_sense local_sense;
819 int retries = 10;
820 unsigned int flags = 0;
821
822 if (!sense)
823 sense = &local_sense;
824
825 /* start of retry loop */
826 do {
827 struct request *rq;
828 int error;
829
830 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
831
832 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
833 rq->cmd_type = REQ_TYPE_ATA_PC;
834 rq->sense = sense;
835 rq->cmd_flags |= cmd_flags;
836 rq->timeout = timeout;
837 if (buffer) {
838 rq->data = buffer;
839 rq->data_len = *bufflen;
840 }
841
842 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
843
844 if (buffer)
845 *bufflen = rq->data_len;
846
847 flags = rq->cmd_flags;
848 blk_put_request(rq);
849
850 /*
851 * FIXME: we should probably abort/retry or something in case of
852 * failure.
853 */
854 if (flags & REQ_FAILED) {
855 /*
856 * The request failed. Retry if it was due to a unit
857 * attention status (usually means media was changed).
858 */
859 struct request_sense *reqbuf = sense;
860
861 if (reqbuf->sense_key == UNIT_ATTENTION)
862 cdrom_saw_media_change(drive);
863 else if (reqbuf->sense_key == NOT_READY &&
864 reqbuf->asc == 4 && reqbuf->ascq != 4) {
865 /*
866 * The drive is in the process of loading
867 * a disk. Retry, but wait a little to give
868 * the drive time to complete the load.
869 */
870 ssleep(2);
871 } else {
872 /* otherwise, don't retry */
873 retries = 0;
874 }
875 --retries;
876 }
877
878 /* end of retry loop */
879 } while ((flags & REQ_FAILED) && retries >= 0);
880
881 /* return an error if the command failed */
882 return (flags & REQ_FAILED) ? -EIO : 0;
883 }
884
885 /*
886 * Called from blk_end_request_callback() after the data of the request is
887 * completed and before the request itself is completed. By returning value '1',
888 * blk_end_request_callback() returns immediately without completing it.
889 */
890 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
891 {
892 return 1;
893 }
894
895 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
896 {
897 ide_hwif_t *hwif = drive->hwif;
898 struct cdrom_info *info = drive->driver_data;
899 struct request *rq = HWGROUP(drive)->rq;
900 xfer_func_t *xferfunc;
901 ide_expiry_t *expiry = NULL;
902 int dma_error = 0, dma, stat, thislen, uptodate = 0;
903 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
904 unsigned int timeout;
905 u16 len;
906 u8 ireason;
907
908 /* check for errors */
909 dma = info->dma;
910 if (dma) {
911 info->dma = 0;
912 dma_error = hwif->dma_ops->dma_end(drive);
913 if (dma_error) {
914 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
915 write ? "write" : "read");
916 ide_dma_off(drive);
917 }
918 }
919
920 if (cdrom_decode_status(drive, 0, &stat))
921 return ide_stopped;
922
923 /* using dma, transfer is complete now */
924 if (dma) {
925 if (dma_error)
926 return ide_error(drive, "dma error", stat);
927 if (blk_fs_request(rq)) {
928 ide_end_request(drive, 1, rq->nr_sectors);
929 return ide_stopped;
930 }
931 goto end_request;
932 }
933
934 ide_read_bcount_and_ireason(drive, &len, &ireason);
935
936 thislen = blk_fs_request(rq) ? len : rq->data_len;
937 if (thislen > len)
938 thislen = len;
939
940 /* If DRQ is clear, the command has completed. */
941 if ((stat & DRQ_STAT) == 0) {
942 if (blk_fs_request(rq)) {
943 /*
944 * If we're not done reading/writing, complain.
945 * Otherwise, complete the command normally.
946 */
947 uptodate = 1;
948 if (rq->current_nr_sectors > 0) {
949 printk(KERN_ERR "%s: %s: data underrun "
950 "(%d blocks)\n",
951 drive->name, __func__,
952 rq->current_nr_sectors);
953 if (!write)
954 rq->cmd_flags |= REQ_FAILED;
955 uptodate = 0;
956 }
957 cdrom_end_request(drive, uptodate);
958 return ide_stopped;
959 } else if (!blk_pc_request(rq)) {
960 ide_cd_request_sense_fixup(rq);
961 /* complain if we still have data left to transfer */
962 uptodate = rq->data_len ? 0 : 1;
963 }
964 goto end_request;
965 }
966
967 /* check which way to transfer data */
968 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
969 return ide_stopped;
970
971 if (blk_fs_request(rq)) {
972 if (write == 0) {
973 int nskip;
974
975 if (ide_cd_check_transfer_size(drive, len)) {
976 cdrom_end_request(drive, 0);
977 return ide_stopped;
978 }
979
980 /*
981 * First, figure out if we need to bit-bucket
982 * any of the leading sectors.
983 */
984 nskip = min_t(int, rq->current_nr_sectors
985 - bio_cur_sectors(rq->bio),
986 thislen >> 9);
987 if (nskip > 0) {
988 ide_pad_transfer(drive, write, nskip << 9);
989 rq->current_nr_sectors -= nskip;
990 thislen -= (nskip << 9);
991 }
992 }
993 }
994
995 if (ireason == 0) {
996 write = 1;
997 xferfunc = hwif->tp_ops->output_data;
998 } else {
999 write = 0;
1000 xferfunc = hwif->tp_ops->input_data;
1001 }
1002
1003 /* transfer data */
1004 while (thislen > 0) {
1005 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1006 int blen = rq->data_len;
1007
1008 /* bio backed? */
1009 if (rq->bio) {
1010 if (blk_fs_request(rq)) {
1011 ptr = rq->buffer;
1012 blen = rq->current_nr_sectors << 9;
1013 } else {
1014 ptr = bio_data(rq->bio);
1015 blen = bio_iovec(rq->bio)->bv_len;
1016 }
1017 }
1018
1019 if (!ptr) {
1020 if (blk_fs_request(rq) && !write)
1021 /*
1022 * If the buffers are full, pipe the rest into
1023 * oblivion.
1024 */
1025 ide_pad_transfer(drive, 0, thislen);
1026 else {
1027 printk(KERN_ERR "%s: confused, missing data\n",
1028 drive->name);
1029 blk_dump_rq_flags(rq, rq_data_dir(rq)
1030 ? "cdrom_newpc_intr, write"
1031 : "cdrom_newpc_intr, read");
1032 }
1033 break;
1034 }
1035
1036 if (blen > thislen)
1037 blen = thislen;
1038
1039 xferfunc(drive, NULL, ptr, blen);
1040
1041 thislen -= blen;
1042 len -= blen;
1043
1044 if (blk_fs_request(rq)) {
1045 rq->buffer += blen;
1046 rq->nr_sectors -= (blen >> 9);
1047 rq->current_nr_sectors -= (blen >> 9);
1048 rq->sector += (blen >> 9);
1049
1050 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1051 cdrom_end_request(drive, 1);
1052 } else {
1053 rq->data_len -= blen;
1054
1055 /*
1056 * The request can't be completed until DRQ is cleared.
1057 * So complete the data, but don't complete the request
1058 * using the dummy function for the callback feature
1059 * of blk_end_request_callback().
1060 */
1061 if (rq->bio)
1062 blk_end_request_callback(rq, 0, blen,
1063 cdrom_newpc_intr_dummy_cb);
1064 else
1065 rq->data += blen;
1066 }
1067 if (!write && blk_sense_request(rq))
1068 rq->sense_len += blen;
1069 }
1070
1071 /* pad, if necessary */
1072 if (!blk_fs_request(rq) && len > 0)
1073 ide_pad_transfer(drive, write, len);
1074
1075 if (blk_pc_request(rq)) {
1076 timeout = rq->timeout;
1077 } else {
1078 timeout = ATAPI_WAIT_PC;
1079 if (!blk_fs_request(rq))
1080 expiry = cdrom_timer_expiry;
1081 }
1082
1083 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1084 return ide_started;
1085
1086 end_request:
1087 if (blk_pc_request(rq)) {
1088 unsigned long flags;
1089 unsigned int dlen = rq->data_len;
1090
1091 if (dma)
1092 rq->data_len = 0;
1093
1094 spin_lock_irqsave(&ide_lock, flags);
1095 if (__blk_end_request(rq, 0, dlen))
1096 BUG();
1097 HWGROUP(drive)->rq = NULL;
1098 spin_unlock_irqrestore(&ide_lock, flags);
1099 } else {
1100 if (!uptodate)
1101 rq->cmd_flags |= REQ_FAILED;
1102 cdrom_end_request(drive, uptodate);
1103 }
1104 return ide_stopped;
1105 }
1106
1107 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1108 {
1109 struct cdrom_info *cd = drive->driver_data;
1110 int write = rq_data_dir(rq) == WRITE;
1111 unsigned short sectors_per_frame =
1112 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1113
1114 if (write) {
1115 /* disk has become write protected */
1116 if (cd->disk->policy) {
1117 cdrom_end_request(drive, 0);
1118 return ide_stopped;
1119 }
1120 } else {
1121 /*
1122 * We may be retrying this request after an error. Fix up any
1123 * weirdness which might be present in the request packet.
1124 */
1125 restore_request(rq);
1126 }
1127
1128 /* use DMA, if possible / writes *must* be hardware frame aligned */
1129 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1130 (rq->sector & (sectors_per_frame - 1))) {
1131 if (write) {
1132 cdrom_end_request(drive, 0);
1133 return ide_stopped;
1134 }
1135 cd->dma = 0;
1136 } else
1137 cd->dma = drive->using_dma;
1138
1139 if (write)
1140 cd->devinfo.media_written = 1;
1141
1142 return ide_started;
1143 }
1144
1145 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1146 {
1147 struct request *rq = HWGROUP(drive)->rq;
1148
1149 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1150 }
1151
1152 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1153 {
1154 struct cdrom_info *info = drive->driver_data;
1155
1156 if (blk_pc_request(rq))
1157 rq->cmd_flags |= REQ_QUIET;
1158 else
1159 rq->cmd_flags &= ~REQ_FAILED;
1160
1161 info->dma = 0;
1162
1163 /* sg request */
1164 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1165 struct request_queue *q = drive->queue;
1166 unsigned int alignment;
1167 unsigned long addr;
1168 unsigned long stack_mask = ~(THREAD_SIZE - 1);
1169
1170 if (rq->bio)
1171 addr = (unsigned long)bio_data(rq->bio);
1172 else
1173 addr = (unsigned long)rq->data;
1174
1175 info->dma = drive->using_dma;
1176
1177 /*
1178 * check if dma is safe
1179 *
1180 * NOTE! The "len" and "addr" checks should possibly have
1181 * separate masks.
1182 */
1183 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1184 if (addr & alignment || rq->data_len & alignment)
1185 info->dma = 0;
1186
1187 if (!((addr & stack_mask) ^
1188 ((unsigned long)current->stack & stack_mask)))
1189 info->dma = 0;
1190 }
1191 }
1192
1193 /*
1194 * cdrom driver request routine.
1195 */
1196 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1197 sector_t block)
1198 {
1199 struct cdrom_info *info = drive->driver_data;
1200 ide_handler_t *fn;
1201 int xferlen;
1202
1203 if (blk_fs_request(rq)) {
1204 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1205 ide_hwif_t *hwif = drive->hwif;
1206 unsigned long elapsed = jiffies - info->start_seek;
1207 int stat = hwif->tp_ops->read_status(hwif);
1208
1209 if ((stat & SEEK_STAT) != SEEK_STAT) {
1210 if (elapsed < IDECD_SEEK_TIMEOUT) {
1211 ide_stall_queue(drive,
1212 IDECD_SEEK_TIMER);
1213 return ide_stopped;
1214 }
1215 printk(KERN_ERR "%s: DSC timeout\n",
1216 drive->name);
1217 }
1218 drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1219 }
1220 if (rq_data_dir(rq) == READ &&
1221 IDE_LARGE_SEEK(info->last_block, block,
1222 IDECD_SEEK_THRESHOLD) &&
1223 drive->dsc_overlap) {
1224 xferlen = 0;
1225 fn = cdrom_start_seek_continuation;
1226
1227 info->dma = 0;
1228 info->start_seek = jiffies;
1229
1230 ide_cd_prepare_seek_request(drive, rq);
1231 } else {
1232 xferlen = 32768;
1233 fn = cdrom_start_rw_cont;
1234
1235 if (cdrom_start_rw(drive, rq) == ide_stopped)
1236 return ide_stopped;
1237
1238 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1239 return ide_stopped;
1240 }
1241 info->last_block = block;
1242 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1243 rq->cmd_type == REQ_TYPE_ATA_PC) {
1244 xferlen = rq->data_len;
1245 fn = cdrom_do_newpc_cont;
1246
1247 if (!rq->timeout)
1248 rq->timeout = ATAPI_WAIT_PC;
1249
1250 cdrom_do_block_pc(drive, rq);
1251 } else if (blk_special_request(rq)) {
1252 /* right now this can only be a reset... */
1253 cdrom_end_request(drive, 1);
1254 return ide_stopped;
1255 } else {
1256 blk_dump_rq_flags(rq, "ide-cd bad flags");
1257 cdrom_end_request(drive, 0);
1258 return ide_stopped;
1259 }
1260
1261 return cdrom_start_packet_command(drive, xferlen, fn);
1262 }
1263
1264 /*
1265 * Ioctl handling.
1266 *
1267 * Routines which queue packet commands take as a final argument a pointer to a
1268 * request_sense struct. If execution of the command results in an error with a
1269 * CHECK CONDITION status, this structure will be filled with the results of the
1270 * subsequent request sense command. The pointer can also be NULL, in which case
1271 * no sense information is returned.
1272 */
1273 static void msf_from_bcd(struct atapi_msf *msf)
1274 {
1275 msf->minute = bcd2bin(msf->minute);
1276 msf->second = bcd2bin(msf->second);
1277 msf->frame = bcd2bin(msf->frame);
1278 }
1279
1280 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1281 {
1282 struct cdrom_info *info = drive->driver_data;
1283 struct cdrom_device_info *cdi = &info->devinfo;
1284 unsigned char cmd[BLK_MAX_CDB];
1285
1286 memset(cmd, 0, BLK_MAX_CDB);
1287 cmd[0] = GPCMD_TEST_UNIT_READY;
1288
1289 /*
1290 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1291 * instead of supporting the LOAD_UNLOAD opcode.
1292 */
1293 cmd[7] = cdi->sanyo_slot % 3;
1294
1295 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1296 }
1297
1298 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1299 unsigned long *sectors_per_frame,
1300 struct request_sense *sense)
1301 {
1302 struct {
1303 __be32 lba;
1304 __be32 blocklen;
1305 } capbuf;
1306
1307 int stat;
1308 unsigned char cmd[BLK_MAX_CDB];
1309 unsigned len = sizeof(capbuf);
1310 u32 blocklen;
1311
1312 memset(cmd, 0, BLK_MAX_CDB);
1313 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1314
1315 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1316 REQ_QUIET);
1317 if (stat)
1318 return stat;
1319
1320 /*
1321 * Sanity check the given block size
1322 */
1323 blocklen = be32_to_cpu(capbuf.blocklen);
1324 switch (blocklen) {
1325 case 512:
1326 case 1024:
1327 case 2048:
1328 case 4096:
1329 break;
1330 default:
1331 printk(KERN_ERR "%s: weird block size %u\n",
1332 drive->name, blocklen);
1333 printk(KERN_ERR "%s: default to 2kb block size\n",
1334 drive->name);
1335 blocklen = 2048;
1336 break;
1337 }
1338
1339 *capacity = 1 + be32_to_cpu(capbuf.lba);
1340 *sectors_per_frame = blocklen >> SECTOR_BITS;
1341 return 0;
1342 }
1343
1344 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1345 int format, char *buf, int buflen,
1346 struct request_sense *sense)
1347 {
1348 unsigned char cmd[BLK_MAX_CDB];
1349
1350 memset(cmd, 0, BLK_MAX_CDB);
1351
1352 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1353 cmd[6] = trackno;
1354 cmd[7] = (buflen >> 8);
1355 cmd[8] = (buflen & 0xff);
1356 cmd[9] = (format << 6);
1357
1358 if (msf_flag)
1359 cmd[1] = 2;
1360
1361 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1362 }
1363
1364 /* Try to read the entire TOC for the disk into our internal buffer. */
1365 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1366 {
1367 int stat, ntracks, i;
1368 struct cdrom_info *info = drive->driver_data;
1369 struct cdrom_device_info *cdi = &info->devinfo;
1370 struct atapi_toc *toc = info->toc;
1371 struct {
1372 struct atapi_toc_header hdr;
1373 struct atapi_toc_entry ent;
1374 } ms_tmp;
1375 long last_written;
1376 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1377
1378 if (toc == NULL) {
1379 /* try to allocate space */
1380 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1381 if (toc == NULL) {
1382 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1383 drive->name);
1384 return -ENOMEM;
1385 }
1386 info->toc = toc;
1387 }
1388
1389 /*
1390 * Check to see if the existing data is still valid. If it is,
1391 * just return.
1392 */
1393 (void) cdrom_check_status(drive, sense);
1394
1395 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1396 return 0;
1397
1398 /* try to get the total cdrom capacity and sector size */
1399 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1400 sense);
1401 if (stat)
1402 toc->capacity = 0x1fffff;
1403
1404 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1405 /* save a private copy of the TOC capacity for error handling */
1406 drive->probed_capacity = toc->capacity * sectors_per_frame;
1407
1408 blk_queue_hardsect_size(drive->queue,
1409 sectors_per_frame << SECTOR_BITS);
1410
1411 /* first read just the header, so we know how long the TOC is */
1412 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1413 sizeof(struct atapi_toc_header), sense);
1414 if (stat)
1415 return stat;
1416
1417 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1418 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1419 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1420 }
1421
1422 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1423 if (ntracks <= 0)
1424 return -EIO;
1425 if (ntracks > MAX_TRACKS)
1426 ntracks = MAX_TRACKS;
1427
1428 /* now read the whole schmeer */
1429 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1430 (char *)&toc->hdr,
1431 sizeof(struct atapi_toc_header) +
1432 (ntracks + 1) *
1433 sizeof(struct atapi_toc_entry), sense);
1434
1435 if (stat && toc->hdr.first_track > 1) {
1436 /*
1437 * Cds with CDI tracks only don't have any TOC entries, despite
1438 * of this the returned values are
1439 * first_track == last_track = number of CDI tracks + 1,
1440 * so that this case is indistinguishable from the same layout
1441 * plus an additional audio track. If we get an error for the
1442 * regular case, we assume a CDI without additional audio
1443 * tracks. In this case the readable TOC is empty (CDI tracks
1444 * are not included) and only holds the Leadout entry.
1445 *
1446 * Heiko Eißfeldt.
1447 */
1448 ntracks = 0;
1449 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1450 (char *)&toc->hdr,
1451 sizeof(struct atapi_toc_header) +
1452 (ntracks + 1) *
1453 sizeof(struct atapi_toc_entry),
1454 sense);
1455 if (stat)
1456 return stat;
1457
1458 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1459 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1460 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1461 } else {
1462 toc->hdr.first_track = CDROM_LEADOUT;
1463 toc->hdr.last_track = CDROM_LEADOUT;
1464 }
1465 }
1466
1467 if (stat)
1468 return stat;
1469
1470 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1471
1472 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1473 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1474 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1475 }
1476
1477 for (i = 0; i <= ntracks; i++) {
1478 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1479 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1480 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1481 msf_from_bcd(&toc->ent[i].addr.msf);
1482 }
1483 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1484 toc->ent[i].addr.msf.second,
1485 toc->ent[i].addr.msf.frame);
1486 }
1487
1488 if (toc->hdr.first_track != CDROM_LEADOUT) {
1489 /* read the multisession information */
1490 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1491 sizeof(ms_tmp), sense);
1492 if (stat)
1493 return stat;
1494
1495 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1496 } else {
1497 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1498 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1499 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1500 }
1501
1502 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1503 /* re-read multisession information using MSF format */
1504 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1505 sizeof(ms_tmp), sense);
1506 if (stat)
1507 return stat;
1508
1509 msf_from_bcd(&ms_tmp.ent.addr.msf);
1510 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1511 ms_tmp.ent.addr.msf.second,
1512 ms_tmp.ent.addr.msf.frame);
1513 }
1514
1515 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1516
1517 /* now try to get the total cdrom capacity */
1518 stat = cdrom_get_last_written(cdi, &last_written);
1519 if (!stat && (last_written > toc->capacity)) {
1520 toc->capacity = last_written;
1521 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1522 drive->probed_capacity = toc->capacity * sectors_per_frame;
1523 }
1524
1525 /* Remember that we've read this stuff. */
1526 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1527
1528 return 0;
1529 }
1530
1531 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1532 {
1533 struct cdrom_info *info = drive->driver_data;
1534 struct cdrom_device_info *cdi = &info->devinfo;
1535 struct packet_command cgc;
1536 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1537
1538 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1539 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1540
1541 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1542 do {
1543 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1544 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1545 if (!stat)
1546 break;
1547 } while (--attempts);
1548 return stat;
1549 }
1550
1551 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1552 {
1553 struct cdrom_info *cd = drive->driver_data;
1554 u16 curspeed, maxspeed;
1555
1556 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1557 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1558 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1559 } else {
1560 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1561 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1562 }
1563
1564 cd->current_speed = (curspeed + (176/2)) / 176;
1565 cd->max_speed = (maxspeed + (176/2)) / 176;
1566 }
1567
1568 #define IDE_CD_CAPABILITIES \
1569 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1570 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1571 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1572 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1573 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1574
1575 static struct cdrom_device_ops ide_cdrom_dops = {
1576 .open = ide_cdrom_open_real,
1577 .release = ide_cdrom_release_real,
1578 .drive_status = ide_cdrom_drive_status,
1579 .media_changed = ide_cdrom_check_media_change_real,
1580 .tray_move = ide_cdrom_tray_move,
1581 .lock_door = ide_cdrom_lock_door,
1582 .select_speed = ide_cdrom_select_speed,
1583 .get_last_session = ide_cdrom_get_last_session,
1584 .get_mcn = ide_cdrom_get_mcn,
1585 .reset = ide_cdrom_reset,
1586 .audio_ioctl = ide_cdrom_audio_ioctl,
1587 .capability = IDE_CD_CAPABILITIES,
1588 .generic_packet = ide_cdrom_packet,
1589 };
1590
1591 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1592 {
1593 struct cdrom_info *info = drive->driver_data;
1594 struct cdrom_device_info *devinfo = &info->devinfo;
1595
1596 devinfo->ops = &ide_cdrom_dops;
1597 devinfo->speed = info->current_speed;
1598 devinfo->capacity = nslots;
1599 devinfo->handle = drive;
1600 strcpy(devinfo->name, drive->name);
1601
1602 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1603 devinfo->mask |= CDC_SELECT_SPEED;
1604
1605 devinfo->disk = info->disk;
1606 return register_cdrom(devinfo);
1607 }
1608
1609 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1610 {
1611 struct cdrom_info *cd = drive->driver_data;
1612 struct cdrom_device_info *cdi = &cd->devinfo;
1613 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1614 mechtype_t mechtype;
1615 int nslots = 1;
1616
1617 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1618 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1619 CDC_MO_DRIVE | CDC_RAM);
1620
1621 if (drive->media == ide_optical) {
1622 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1623 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1624 drive->name);
1625 return nslots;
1626 }
1627
1628 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1629 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1630 cdi->mask &= ~CDC_PLAY_AUDIO;
1631 return nslots;
1632 }
1633
1634 /*
1635 * We have to cheat a little here. the packet will eventually be queued
1636 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1637 * Since this device hasn't been registered with the Uniform layer yet,
1638 * it can't do this. Same goes for cdi->ops.
1639 */
1640 cdi->handle = drive;
1641 cdi->ops = &ide_cdrom_dops;
1642
1643 if (ide_cdrom_get_capabilities(drive, buf))
1644 return 0;
1645
1646 if ((buf[8 + 6] & 0x01) == 0)
1647 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
1648 if (buf[8 + 6] & 0x08)
1649 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1650 if (buf[8 + 3] & 0x01)
1651 cdi->mask &= ~CDC_CD_R;
1652 if (buf[8 + 3] & 0x02)
1653 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1654 if (buf[8 + 2] & 0x38)
1655 cdi->mask &= ~CDC_DVD;
1656 if (buf[8 + 3] & 0x20)
1657 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1658 if (buf[8 + 3] & 0x10)
1659 cdi->mask &= ~CDC_DVD_R;
1660 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1661 cdi->mask &= ~CDC_PLAY_AUDIO;
1662
1663 mechtype = buf[8 + 6] >> 5;
1664 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1665 cdi->mask |= CDC_CLOSE_TRAY;
1666
1667 if (cdi->sanyo_slot > 0) {
1668 cdi->mask &= ~CDC_SELECT_DISC;
1669 nslots = 3;
1670 } else if (mechtype == mechtype_individual_changer ||
1671 mechtype == mechtype_cartridge_changer) {
1672 nslots = cdrom_number_of_slots(cdi);
1673 if (nslots > 1)
1674 cdi->mask &= ~CDC_SELECT_DISC;
1675 }
1676
1677 ide_cdrom_update_speed(drive, buf);
1678
1679 printk(KERN_INFO "%s: ATAPI", drive->name);
1680
1681 /* don't print speed if the drive reported 0 */
1682 if (cd->max_speed)
1683 printk(KERN_CONT " %dX", cd->max_speed);
1684
1685 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1686
1687 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1688 printk(KERN_CONT " DVD%s%s",
1689 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1690 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1691
1692 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1693 printk(KERN_CONT " CD%s%s",
1694 (cdi->mask & CDC_CD_R) ? "" : "-R",
1695 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1696
1697 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1698 printk(KERN_CONT " changer w/%d slots", nslots);
1699 else
1700 printk(KERN_CONT " drive");
1701
1702 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpup((__be16 *)&buf[8 + 12]));
1703
1704 return nslots;
1705 }
1706
1707 /* standard prep_rq_fn that builds 10 byte cmds */
1708 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1709 {
1710 int hard_sect = queue_hardsect_size(q);
1711 long block = (long)rq->hard_sector / (hard_sect >> 9);
1712 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1713
1714 memset(rq->cmd, 0, BLK_MAX_CDB);
1715
1716 if (rq_data_dir(rq) == READ)
1717 rq->cmd[0] = GPCMD_READ_10;
1718 else
1719 rq->cmd[0] = GPCMD_WRITE_10;
1720
1721 /*
1722 * fill in lba
1723 */
1724 rq->cmd[2] = (block >> 24) & 0xff;
1725 rq->cmd[3] = (block >> 16) & 0xff;
1726 rq->cmd[4] = (block >> 8) & 0xff;
1727 rq->cmd[5] = block & 0xff;
1728
1729 /*
1730 * and transfer length
1731 */
1732 rq->cmd[7] = (blocks >> 8) & 0xff;
1733 rq->cmd[8] = blocks & 0xff;
1734 rq->cmd_len = 10;
1735 return BLKPREP_OK;
1736 }
1737
1738 /*
1739 * Most of the SCSI commands are supported directly by ATAPI devices.
1740 * This transform handles the few exceptions.
1741 */
1742 static int ide_cdrom_prep_pc(struct request *rq)
1743 {
1744 u8 *c = rq->cmd;
1745
1746 /* transform 6-byte read/write commands to the 10-byte version */
1747 if (c[0] == READ_6 || c[0] == WRITE_6) {
1748 c[8] = c[4];
1749 c[5] = c[3];
1750 c[4] = c[2];
1751 c[3] = c[1] & 0x1f;
1752 c[2] = 0;
1753 c[1] &= 0xe0;
1754 c[0] += (READ_10 - READ_6);
1755 rq->cmd_len = 10;
1756 return BLKPREP_OK;
1757 }
1758
1759 /*
1760 * it's silly to pretend we understand 6-byte sense commands, just
1761 * reject with ILLEGAL_REQUEST and the caller should take the
1762 * appropriate action
1763 */
1764 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1765 rq->errors = ILLEGAL_REQUEST;
1766 return BLKPREP_KILL;
1767 }
1768
1769 return BLKPREP_OK;
1770 }
1771
1772 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1773 {
1774 if (blk_fs_request(rq))
1775 return ide_cdrom_prep_fs(q, rq);
1776 else if (blk_pc_request(rq))
1777 return ide_cdrom_prep_pc(rq);
1778
1779 return 0;
1780 }
1781
1782 struct cd_list_entry {
1783 const char *id_model;
1784 const char *id_firmware;
1785 unsigned int cd_flags;
1786 };
1787
1788 #ifdef CONFIG_IDE_PROC_FS
1789 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1790 {
1791 unsigned long capacity, sectors_per_frame;
1792
1793 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1794 return 0;
1795
1796 return capacity * sectors_per_frame;
1797 }
1798
1799 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1800 int count, int *eof, void *data)
1801 {
1802 ide_drive_t *drive = data;
1803 int len;
1804
1805 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1806 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1807 }
1808
1809 static ide_proc_entry_t idecd_proc[] = {
1810 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1811 { NULL, 0, NULL, NULL }
1812 };
1813
1814 static void ide_cdrom_add_settings(ide_drive_t *drive)
1815 {
1816 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1817 &drive->dsc_overlap, NULL);
1818 }
1819 #else
1820 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1821 #endif
1822
1823 static const struct cd_list_entry ide_cd_quirks_list[] = {
1824 /* Limit transfer size per interrupt. */
1825 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1826 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1827 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1828 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1829 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1830 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1831 IDE_AFLAG_PRE_ATAPI12, },
1832 /* Vertos 300, some versions of this drive like to talk BCD. */
1833 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1834 /* Vertos 600 ESD. */
1835 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1836 /*
1837 * Sanyo 3 CD changer uses a non-standard command for CD changing
1838 * (by default standard ATAPI support for CD changers is used).
1839 */
1840 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1841 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1842 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1843 /* Stingray 8X CD-ROM. */
1844 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1845 /*
1846 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1847 * mode sense page capabilities size, but older drives break.
1848 */
1849 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1850 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1851 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1852 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1853 /*
1854 * Some drives used by Apple don't advertise audio play
1855 * but they do support reading TOC & audio datas.
1856 */
1857 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1858 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1859 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1860 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1861 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1862 { NULL, NULL, 0 }
1863 };
1864
1865 static unsigned int ide_cd_flags(struct hd_driveid *id)
1866 {
1867 const struct cd_list_entry *cle = ide_cd_quirks_list;
1868
1869 while (cle->id_model) {
1870 if (strcmp(cle->id_model, id->model) == 0 &&
1871 (cle->id_firmware == NULL ||
1872 strstr(id->fw_rev, cle->id_firmware)))
1873 return cle->cd_flags;
1874 cle++;
1875 }
1876
1877 return 0;
1878 }
1879
1880 static int ide_cdrom_setup(ide_drive_t *drive)
1881 {
1882 struct cdrom_info *cd = drive->driver_data;
1883 struct cdrom_device_info *cdi = &cd->devinfo;
1884 struct hd_driveid *id = drive->id;
1885 int nslots;
1886
1887 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1888 blk_queue_dma_alignment(drive->queue, 31);
1889 blk_queue_update_dma_pad(drive->queue, 15);
1890 drive->queue->unplug_delay = (1 * HZ) / 1000;
1891 if (!drive->queue->unplug_delay)
1892 drive->queue->unplug_delay = 1;
1893
1894 drive->special.all = 0;
1895
1896 drive->atapi_flags = IDE_AFLAG_MEDIA_CHANGED | IDE_AFLAG_NO_EJECT |
1897 ide_cd_flags(id);
1898
1899 if ((id->config & 0x0060) == 0x20)
1900 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1901
1902 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1903 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1904 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1905 IDE_AFLAG_TOCADDR_AS_BCD);
1906 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1907 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1908 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1909 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1910 /* 3 => use CD in slot 0 */
1911 cdi->sanyo_slot = 3;
1912
1913 nslots = ide_cdrom_probe_capabilities(drive);
1914
1915 /* set correct block size */
1916 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1917
1918 drive->dsc_overlap = (drive->next != drive);
1919
1920 if (ide_cdrom_register(drive, nslots)) {
1921 printk(KERN_ERR "%s: %s failed to register device with the"
1922 " cdrom driver.\n", drive->name, __func__);
1923 cd->devinfo.handle = NULL;
1924 return 1;
1925 }
1926 ide_cdrom_add_settings(drive);
1927 return 0;
1928 }
1929
1930 static void ide_cd_remove(ide_drive_t *drive)
1931 {
1932 struct cdrom_info *info = drive->driver_data;
1933
1934 ide_proc_unregister_driver(drive, info->driver);
1935
1936 blk_unregister_filter(info->disk);
1937 del_gendisk(info->disk);
1938
1939 ide_cd_put(info);
1940 }
1941
1942 static void ide_cd_release(struct kref *kref)
1943 {
1944 struct cdrom_info *info = to_ide_cd(kref);
1945 struct cdrom_device_info *devinfo = &info->devinfo;
1946 ide_drive_t *drive = info->drive;
1947 struct gendisk *g = info->disk;
1948
1949 kfree(info->toc);
1950 if (devinfo->handle == drive)
1951 unregister_cdrom(devinfo);
1952 drive->dsc_overlap = 0;
1953 drive->driver_data = NULL;
1954 blk_queue_prep_rq(drive->queue, NULL);
1955 g->private_data = NULL;
1956 put_disk(g);
1957 kfree(info);
1958 }
1959
1960 static int ide_cd_probe(ide_drive_t *);
1961
1962 static ide_driver_t ide_cdrom_driver = {
1963 .gen_driver = {
1964 .owner = THIS_MODULE,
1965 .name = "ide-cdrom",
1966 .bus = &ide_bus_type,
1967 },
1968 .probe = ide_cd_probe,
1969 .remove = ide_cd_remove,
1970 .version = IDECD_VERSION,
1971 .media = ide_cdrom,
1972 .supports_dsc_overlap = 1,
1973 .do_request = ide_cd_do_request,
1974 .end_request = ide_end_request,
1975 .error = __ide_error,
1976 #ifdef CONFIG_IDE_PROC_FS
1977 .proc = idecd_proc,
1978 #endif
1979 };
1980
1981 static int idecd_open(struct inode *inode, struct file *file)
1982 {
1983 struct gendisk *disk = inode->i_bdev->bd_disk;
1984 struct cdrom_info *info;
1985 int rc = -ENOMEM;
1986
1987 info = ide_cd_get(disk);
1988 if (!info)
1989 return -ENXIO;
1990
1991 rc = cdrom_open(&info->devinfo, inode, file);
1992
1993 if (rc < 0)
1994 ide_cd_put(info);
1995
1996 return rc;
1997 }
1998
1999 static int idecd_release(struct inode *inode, struct file *file)
2000 {
2001 struct gendisk *disk = inode->i_bdev->bd_disk;
2002 struct cdrom_info *info = ide_cd_g(disk);
2003
2004 cdrom_release(&info->devinfo, file);
2005
2006 ide_cd_put(info);
2007
2008 return 0;
2009 }
2010
2011 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2012 {
2013 struct packet_command cgc;
2014 char buffer[16];
2015 int stat;
2016 char spindown;
2017
2018 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2019 return -EFAULT;
2020
2021 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2022
2023 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2024 if (stat)
2025 return stat;
2026
2027 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2028 return cdrom_mode_select(cdi, &cgc);
2029 }
2030
2031 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2032 {
2033 struct packet_command cgc;
2034 char buffer[16];
2035 int stat;
2036 char spindown;
2037
2038 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2039
2040 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2041 if (stat)
2042 return stat;
2043
2044 spindown = buffer[11] & 0x0f;
2045 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2046 return -EFAULT;
2047 return 0;
2048 }
2049
2050 static int idecd_ioctl(struct inode *inode, struct file *file,
2051 unsigned int cmd, unsigned long arg)
2052 {
2053 struct block_device *bdev = inode->i_bdev;
2054 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2055 int err;
2056
2057 switch (cmd) {
2058 case CDROMSETSPINDOWN:
2059 return idecd_set_spindown(&info->devinfo, arg);
2060 case CDROMGETSPINDOWN:
2061 return idecd_get_spindown(&info->devinfo, arg);
2062 default:
2063 break;
2064 }
2065
2066 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2067 if (err == -EINVAL)
2068 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2069
2070 return err;
2071 }
2072
2073 static int idecd_media_changed(struct gendisk *disk)
2074 {
2075 struct cdrom_info *info = ide_cd_g(disk);
2076 return cdrom_media_changed(&info->devinfo);
2077 }
2078
2079 static int idecd_revalidate_disk(struct gendisk *disk)
2080 {
2081 struct cdrom_info *info = ide_cd_g(disk);
2082 struct request_sense sense;
2083
2084 ide_cd_read_toc(info->drive, &sense);
2085
2086 return 0;
2087 }
2088
2089 static struct block_device_operations idecd_ops = {
2090 .owner = THIS_MODULE,
2091 .open = idecd_open,
2092 .release = idecd_release,
2093 .ioctl = idecd_ioctl,
2094 .media_changed = idecd_media_changed,
2095 .revalidate_disk = idecd_revalidate_disk
2096 };
2097
2098 /* module options */
2099 static char *ignore;
2100
2101 module_param(ignore, charp, 0400);
2102 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2103
2104 static int ide_cd_probe(ide_drive_t *drive)
2105 {
2106 struct cdrom_info *info;
2107 struct gendisk *g;
2108 struct request_sense sense;
2109
2110 if (!strstr("ide-cdrom", drive->driver_req))
2111 goto failed;
2112 if (!drive->present)
2113 goto failed;
2114 if (drive->media != ide_cdrom && drive->media != ide_optical)
2115 goto failed;
2116 /* skip drives that we were told to ignore */
2117 if (ignore != NULL) {
2118 if (strstr(ignore, drive->name)) {
2119 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2120 drive->name);
2121 goto failed;
2122 }
2123 }
2124 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2125 if (info == NULL) {
2126 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2127 drive->name);
2128 goto failed;
2129 }
2130
2131 g = alloc_disk(1 << PARTN_BITS);
2132 if (!g)
2133 goto out_free_cd;
2134
2135 ide_init_disk(g, drive);
2136
2137 ide_proc_register_driver(drive, &ide_cdrom_driver);
2138
2139 kref_init(&info->kref);
2140
2141 info->drive = drive;
2142 info->driver = &ide_cdrom_driver;
2143 info->disk = g;
2144
2145 g->private_data = &info->driver;
2146
2147 drive->driver_data = info;
2148
2149 g->minors = 1;
2150 g->driverfs_dev = &drive->gendev;
2151 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2152 if (ide_cdrom_setup(drive)) {
2153 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2154 ide_cd_release(&info->kref);
2155 goto failed;
2156 }
2157
2158 ide_cd_read_toc(drive, &sense);
2159 g->fops = &idecd_ops;
2160 g->flags |= GENHD_FL_REMOVABLE;
2161 add_disk(g);
2162 blk_register_filter(g);
2163 return 0;
2164
2165 out_free_cd:
2166 kfree(info);
2167 failed:
2168 return -ENODEV;
2169 }
2170
2171 static void __exit ide_cdrom_exit(void)
2172 {
2173 driver_unregister(&ide_cdrom_driver.gen_driver);
2174 }
2175
2176 static int __init ide_cdrom_init(void)
2177 {
2178 return driver_register(&ide_cdrom_driver.gen_driver);
2179 }
2180
2181 MODULE_ALIAS("ide:*m-cdrom*");
2182 MODULE_ALIAS("ide-cd");
2183 module_init(ide_cdrom_init);
2184 module_exit(ide_cdrom_exit);
2185 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards