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GFS2: Support for FIEMAP ioctl
[linux-2.6/linux-loongson.git] / drivers / ide / ide-cd.c
blob1a7410f882494907b3568d0263c917a0af73d2fa
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 static DEFINE_MUTEX(idecd_ref_mutex);
57
58 static void ide_cd_release(struct kref *);
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 kref_get(&cd->kref);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75 }
76
77 static void ide_cd_put(struct cdrom_info *cd)
78 {
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 kref_put(&cd->kref, ide_cd_release);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85 }
86
87 /*
88 * Generic packet command support and error handling routines.
89 */
90
91 /* Mark that we've seen a media change and invalidate our internal buffers. */
92 static void cdrom_saw_media_change(ide_drive_t *drive)
93 {
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96 }
97
98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
99 struct request_sense *sense)
100 {
101 int log = 0;
102
103 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
104 sense->sense_key);
105
106 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
107 return 0;
108
109 switch (sense->sense_key) {
110 case NO_SENSE:
111 case RECOVERED_ERROR:
112 break;
113 case NOT_READY:
114 /*
115 * don't care about tray state messages for e.g. capacity
116 * commands or in-progress or becoming ready
117 */
118 if (sense->asc == 0x3a || sense->asc == 0x04)
119 break;
120 log = 1;
121 break;
122 case ILLEGAL_REQUEST:
123 /*
124 * don't log START_STOP unit with LoEj set, since we cannot
125 * reliably check if drive can auto-close
126 */
127 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
128 break;
129 log = 1;
130 break;
131 case UNIT_ATTENTION:
132 /*
133 * Make good and sure we've seen this potential media change.
134 * Some drives (i.e. Creative) fail to present the correct sense
135 * key in the error register.
136 */
137 cdrom_saw_media_change(drive);
138 break;
139 default:
140 log = 1;
141 break;
142 }
143 return log;
144 }
145
146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
147 struct request *failed_command,
148 struct request_sense *sense)
149 {
150 unsigned long sector;
151 unsigned long bio_sectors;
152 struct cdrom_info *info = drive->driver_data;
153
154 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
155 "sense_key: 0x%x\n", __func__, sense->error_code,
156 sense->sense_key);
157
158 if (failed_command)
159 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
160 __func__, failed_command->cmd[0]);
161
162 if (!cdrom_log_sense(drive, failed_command, sense))
163 return;
164
165 /*
166 * If a read toc is executed for a CD-R or CD-RW medium where the first
167 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
168 * confusing error)
169 */
170 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
171 if (sense->sense_key == 0x05 && sense->asc == 0x24)
172 return;
173
174 /* current error */
175 if (sense->error_code == 0x70) {
176 switch (sense->sense_key) {
177 case MEDIUM_ERROR:
178 case VOLUME_OVERFLOW:
179 case ILLEGAL_REQUEST:
180 if (!sense->valid)
181 break;
182 if (failed_command == NULL ||
183 !blk_fs_request(failed_command))
184 break;
185 sector = (sense->information[0] << 24) |
186 (sense->information[1] << 16) |
187 (sense->information[2] << 8) |
188 (sense->information[3]);
189
190 if (drive->queue->hardsect_size == 2048)
191 /* device sector size is 2K */
192 sector <<= 2;
193
194 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
195 sector &= ~(bio_sectors - 1);
196
197 if (sector < get_capacity(info->disk) &&
198 drive->probed_capacity - sector < 4 * 75)
199 set_capacity(info->disk, sector);
200 }
201 }
202
203 ide_cd_log_error(drive->name, failed_command, sense);
204 }
205
206 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
207 struct request *failed_command)
208 {
209 struct cdrom_info *info = drive->driver_data;
210 struct request *rq = &info->request_sense_request;
211
212 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
213
214 if (sense == NULL)
215 sense = &info->sense_data;
216
217 /* stuff the sense request in front of our current request */
218 blk_rq_init(NULL, rq);
219 rq->cmd_type = REQ_TYPE_ATA_PC;
220 rq->rq_disk = info->disk;
221
222 rq->data = sense;
223 rq->cmd[0] = GPCMD_REQUEST_SENSE;
224 rq->cmd[4] = 18;
225 rq->data_len = 18;
226
227 rq->cmd_type = REQ_TYPE_SENSE;
228 rq->cmd_flags |= REQ_PREEMPT;
229
230 /* NOTE! Save the failed command in "rq->buffer" */
231 rq->buffer = (void *) failed_command;
232
233 if (failed_command)
234 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
235 failed_command->cmd[0]);
236
237 ide_do_drive_cmd(drive, rq);
238 }
239
240 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
241 {
242 struct request *rq = HWGROUP(drive)->rq;
243 int nsectors = rq->hard_cur_sectors;
244
245 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
246 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
247 nsectors);
248
249 if (blk_sense_request(rq) && uptodate) {
250 /*
251 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
252 * failed request
253 */
254 struct request *failed = (struct request *) rq->buffer;
255 struct cdrom_info *info = drive->driver_data;
256 void *sense = &info->sense_data;
257
258 if (failed) {
259 if (failed->sense) {
260 sense = failed->sense;
261 failed->sense_len = rq->sense_len;
262 }
263 cdrom_analyze_sense_data(drive, failed, sense);
264 /*
265 * now end the failed request
266 */
267 if (blk_fs_request(failed)) {
268 if (ide_end_dequeued_request(drive, failed, 0,
269 failed->hard_nr_sectors))
270 BUG();
271 } else {
272 if (blk_end_request(failed, -EIO,
273 failed->data_len))
274 BUG();
275 }
276 } else
277 cdrom_analyze_sense_data(drive, NULL, sense);
278 }
279
280 if (!rq->current_nr_sectors && blk_fs_request(rq))
281 uptodate = 1;
282 /* make sure it's fully ended */
283 if (blk_pc_request(rq))
284 nsectors = (rq->data_len + 511) >> 9;
285 if (!nsectors)
286 nsectors = 1;
287
288 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
289 __func__, uptodate, nsectors);
290
291 ide_end_request(drive, uptodate, nsectors);
292 }
293
294 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
295 {
296 if (st & 0x80)
297 return;
298 ide_dump_status(drive, msg, st);
299 }
300
301 /*
302 * Returns:
303 * 0: if the request should be continued.
304 * 1: if the request was ended.
305 */
306 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
307 {
308 ide_hwif_t *hwif = drive->hwif;
309 ide_hwgroup_t *hwgroup = hwif->hwgroup;
310 struct request *rq = hwgroup->rq;
311 int stat, err, sense_key;
312
313 /* check for errors */
314 stat = hwif->tp_ops->read_status(hwif);
315
316 if (stat_ret)
317 *stat_ret = stat;
318
319 if (OK_STAT(stat, good_stat, BAD_R_STAT))
320 return 0;
321
322 /* get the IDE error register */
323 err = ide_read_error(drive);
324 sense_key = err >> 4;
325
326 if (rq == NULL) {
327 printk(KERN_ERR PFX "%s: missing rq in %s\n",
328 drive->name, __func__);
329 return 1;
330 }
331
332 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
333 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
334 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
335
336 if (blk_sense_request(rq)) {
337 /*
338 * We got an error trying to get sense info from the drive
339 * (probably while trying to recover from a former error).
340 * Just give up.
341 */
342 rq->cmd_flags |= REQ_FAILED;
343 cdrom_end_request(drive, 0);
344 ide_error(drive, "request sense failure", stat);
345 return 1;
346
347 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
348 /* All other functions, except for READ. */
349
350 /*
351 * if we have an error, pass back CHECK_CONDITION as the
352 * scsi status byte
353 */
354 if (blk_pc_request(rq) && !rq->errors)
355 rq->errors = SAM_STAT_CHECK_CONDITION;
356
357 /* check for tray open */
358 if (sense_key == NOT_READY) {
359 cdrom_saw_media_change(drive);
360 } else if (sense_key == UNIT_ATTENTION) {
361 /* check for media change */
362 cdrom_saw_media_change(drive);
363 return 0;
364 } else if (sense_key == ILLEGAL_REQUEST &&
365 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
366 /*
367 * Don't print error message for this condition--
368 * SFF8090i indicates that 5/24/00 is the correct
369 * response to a request to close the tray if the
370 * drive doesn't have that capability.
371 * cdrom_log_sense() knows this!
372 */
373 } else if (!(rq->cmd_flags & REQ_QUIET)) {
374 /* otherwise, print an error */
375 ide_dump_status(drive, "packet command error", stat);
376 }
377
378 rq->cmd_flags |= REQ_FAILED;
379
380 /*
381 * instead of playing games with moving completions around,
382 * remove failed request completely and end it when the
383 * request sense has completed
384 */
385 goto end_request;
386
387 } else if (blk_fs_request(rq)) {
388 int do_end_request = 0;
389
390 /* handle errors from READ and WRITE requests */
391
392 if (blk_noretry_request(rq))
393 do_end_request = 1;
394
395 if (sense_key == NOT_READY) {
396 /* tray open */
397 if (rq_data_dir(rq) == READ) {
398 cdrom_saw_media_change(drive);
399
400 /* fail the request */
401 printk(KERN_ERR PFX "%s: tray open\n",
402 drive->name);
403 do_end_request = 1;
404 } else {
405 struct cdrom_info *info = drive->driver_data;
406
407 /*
408 * Allow the drive 5 seconds to recover, some
409 * devices will return this error while flushing
410 * data from cache.
411 */
412 if (!rq->errors)
413 info->write_timeout = jiffies +
414 ATAPI_WAIT_WRITE_BUSY;
415 rq->errors = 1;
416 if (time_after(jiffies, info->write_timeout))
417 do_end_request = 1;
418 else {
419 struct request_queue *q = drive->queue;
420 unsigned long flags;
421
422 /*
423 * take a breather relying on the unplug
424 * timer to kick us again
425 */
426 spin_lock_irqsave(q->queue_lock, flags);
427 blk_plug_device(q);
428 spin_unlock_irqrestore(q->queue_lock, flags);
429
430 return 1;
431 }
432 }
433 } else if (sense_key == UNIT_ATTENTION) {
434 /* media change */
435 cdrom_saw_media_change(drive);
436
437 /*
438 * Arrange to retry the request but be sure to give up
439 * if we've retried too many times.
440 */
441 if (++rq->errors > ERROR_MAX)
442 do_end_request = 1;
443 } else if (sense_key == ILLEGAL_REQUEST ||
444 sense_key == DATA_PROTECT) {
445 /*
446 * No point in retrying after an illegal request or data
447 * protect error.
448 */
449 ide_dump_status_no_sense(drive, "command error", stat);
450 do_end_request = 1;
451 } else if (sense_key == MEDIUM_ERROR) {
452 /*
453 * No point in re-trying a zillion times on a bad
454 * sector. If we got here the error is not correctable.
455 */
456 ide_dump_status_no_sense(drive,
457 "media error (bad sector)",
458 stat);
459 do_end_request = 1;
460 } else if (sense_key == BLANK_CHECK) {
461 /* disk appears blank ?? */
462 ide_dump_status_no_sense(drive, "media error (blank)",
463 stat);
464 do_end_request = 1;
465 } else if ((err & ~ATA_ABORTED) != 0) {
466 /* go to the default handler for other errors */
467 ide_error(drive, "cdrom_decode_status", stat);
468 return 1;
469 } else if ((++rq->errors > ERROR_MAX)) {
470 /* we've racked up too many retries, abort */
471 do_end_request = 1;
472 }
473
474 /*
475 * End a request through request sense analysis when we have
476 * sense data. We need this in order to perform end of media
477 * processing.
478 */
479 if (do_end_request)
480 goto end_request;
481
482 /*
483 * If we got a CHECK_CONDITION status, queue
484 * a request sense command.
485 */
486 if (stat & ATA_ERR)
487 cdrom_queue_request_sense(drive, NULL, NULL);
488 } else {
489 blk_dump_rq_flags(rq, PFX "bad rq");
490 cdrom_end_request(drive, 0);
491 }
492
493 /* retry, or handle the next request */
494 return 1;
495
496 end_request:
497 if (stat & ATA_ERR) {
498 struct request_queue *q = drive->queue;
499 unsigned long flags;
500
501 spin_lock_irqsave(q->queue_lock, flags);
502 blkdev_dequeue_request(rq);
503 spin_unlock_irqrestore(q->queue_lock, flags);
504
505 hwgroup->rq = NULL;
506
507 cdrom_queue_request_sense(drive, rq->sense, rq);
508 } else
509 cdrom_end_request(drive, 0);
510
511 return 1;
512 }
513
514 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
515 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
516
517 /*
518 * Set up the device registers for transferring a packet command on DEV,
519 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
520 * which actually transfers the command to the drive. If this is a
521 * drq_interrupt device, this routine will arrange for HANDLER to be
522 * called when the interrupt from the drive arrives. Otherwise, HANDLER
523 * will be called immediately after the drive is prepared for the transfer.
524 */
525 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
526 {
527 ide_hwif_t *hwif = drive->hwif;
528 struct request *rq = hwif->hwgroup->rq;
529 int xferlen;
530
531 xferlen = ide_cd_get_xferlen(rq);
532
533 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
534
535 /* FIXME: for Virtual DMA we must check harder */
536 if (drive->dma)
537 drive->dma = !hwif->dma_ops->dma_setup(drive);
538
539 /* set up the controller registers */
540 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
541 xferlen, drive->dma);
542
543 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
544 /* waiting for CDB interrupt, not DMA yet. */
545 if (drive->dma)
546 drive->waiting_for_dma = 0;
547
548 /* packet command */
549 ide_execute_command(drive, ATA_CMD_PACKET,
550 cdrom_transfer_packet_command,
551 ATAPI_WAIT_PC, ide_cd_expiry);
552 return ide_started;
553 } else {
554 ide_execute_pkt_cmd(drive);
555
556 return cdrom_transfer_packet_command(drive);
557 }
558 }
559
560 /*
561 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
562 * registers must have already been prepared by cdrom_start_packet_command.
563 * HANDLER is the interrupt handler to call when the command completes or
564 * there's data ready.
565 */
566 #define ATAPI_MIN_CDB_BYTES 12
567 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive)
568 {
569 ide_hwif_t *hwif = drive->hwif;
570 struct request *rq = hwif->hwgroup->rq;
571 int cmd_len;
572 ide_startstop_t startstop;
573
574 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
575
576 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
577 /*
578 * Here we should have been called after receiving an interrupt
579 * from the device. DRQ should how be set.
580 */
581
582 /* check for errors */
583 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
584 return ide_stopped;
585
586 /* ok, next interrupt will be DMA interrupt */
587 if (drive->dma)
588 drive->waiting_for_dma = 1;
589 } else {
590 /* otherwise, we must wait for DRQ to get set */
591 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
592 ATA_BUSY, WAIT_READY))
593 return startstop;
594 }
595
596 /* arm the interrupt handler */
597 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry);
598
599 /* ATAPI commands get padded out to 12 bytes minimum */
600 cmd_len = COMMAND_SIZE(rq->cmd[0]);
601 if (cmd_len < ATAPI_MIN_CDB_BYTES)
602 cmd_len = ATAPI_MIN_CDB_BYTES;
603
604 /* send the command to the device */
605 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
606
607 /* start the DMA if need be */
608 if (drive->dma)
609 hwif->dma_ops->dma_start(drive);
610
611 return ide_started;
612 }
613
614 /*
615 * Check the contents of the interrupt reason register from the cdrom
616 * and attempt to recover if there are problems. Returns 0 if everything's
617 * ok; nonzero if the request has been terminated.
618 */
619 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
620 int len, int ireason, int rw)
621 {
622 ide_hwif_t *hwif = drive->hwif;
623
624 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
625 __func__, ireason, rw);
626
627 /*
628 * ireason == 0: the drive wants to receive data from us
629 * ireason == 2: the drive is expecting to transfer data to us
630 */
631 if (ireason == (!rw << 1))
632 return 0;
633 else if (ireason == (rw << 1)) {
634
635 /* whoops... */
636 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
637 drive->name, __func__);
638
639 ide_pad_transfer(drive, rw, len);
640 } else if (rw == 0 && ireason == 1) {
641 /*
642 * Some drives (ASUS) seem to tell us that status info is
643 * available. Just get it and ignore.
644 */
645 (void)hwif->tp_ops->read_status(hwif);
646 return 0;
647 } else {
648 /* drive wants a command packet, or invalid ireason... */
649 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
650 drive->name, __func__, ireason);
651 }
652
653 if (rq->cmd_type == REQ_TYPE_ATA_PC)
654 rq->cmd_flags |= REQ_FAILED;
655
656 cdrom_end_request(drive, 0);
657 return -1;
658 }
659
660 /*
661 * Assume that the drive will always provide data in multiples of at least
662 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
663 */
664 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
665 {
666 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
667
668 if ((len % SECTOR_SIZE) == 0)
669 return 0;
670
671 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
672 __func__, len);
673
674 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
675 printk(KERN_ERR PFX "This drive is not supported by this "
676 "version of the driver\n");
677 else {
678 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
679 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
680 }
681
682 return 1;
683 }
684
685 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
686 struct request *rq)
687 {
688 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
689 rq->cmd_flags);
690
691 if (rq_data_dir(rq) == READ) {
692 unsigned short sectors_per_frame =
693 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
694 int nskip = rq->sector & (sectors_per_frame - 1);
695
696 /*
697 * If the requested sector doesn't start on a frame boundary,
698 * we must adjust the start of the transfer so that it does,
699 * and remember to skip the first few sectors.
700 *
701 * If the rq->current_nr_sectors field is larger than the size
702 * of the buffer, it will mean that we're to skip a number of
703 * sectors equal to the amount by which rq->current_nr_sectors
704 * is larger than the buffer size.
705 */
706 if (nskip > 0) {
707 /* sanity check... */
708 if (rq->current_nr_sectors !=
709 bio_cur_sectors(rq->bio)) {
710 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
711 drive->name, __func__,
712 rq->current_nr_sectors);
713 cdrom_end_request(drive, 0);
714 return ide_stopped;
715 }
716 rq->current_nr_sectors += nskip;
717 }
718 }
719
720 /* set up the command */
721 rq->timeout = ATAPI_WAIT_PC;
722
723 return ide_started;
724 }
725
726 /*
727 * Fix up a possibly partially-processed request so that we can start it over
728 * entirely, or even put it back on the request queue.
729 */
730 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
731 {
732
733 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
734
735 if (rq->buffer != bio_data(rq->bio)) {
736 sector_t n =
737 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
738
739 rq->buffer = bio_data(rq->bio);
740 rq->nr_sectors += n;
741 rq->sector -= n;
742 }
743 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
744 rq->hard_cur_sectors = rq->current_nr_sectors;
745 rq->hard_nr_sectors = rq->nr_sectors;
746 rq->hard_sector = rq->sector;
747 rq->q->prep_rq_fn(rq->q, rq);
748 }
749
750 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
751 {
752 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
753 __func__, rq->cmd[0]);
754
755 /*
756 * Some of the trailing request sense fields are optional,
757 * and some drives don't send them. Sigh.
758 */
759 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
760 rq->data_len > 0 && rq->data_len <= 5)
761 while (rq->data_len > 0) {
762 *(u8 *)rq->data++ = 0;
763 --rq->data_len;
764 }
765 }
766
767 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
768 int write, void *buffer, unsigned *bufflen,
769 struct request_sense *sense, int timeout,
770 unsigned int cmd_flags)
771 {
772 struct cdrom_info *info = drive->driver_data;
773 struct request_sense local_sense;
774 int retries = 10;
775 unsigned int flags = 0;
776
777 if (!sense)
778 sense = &local_sense;
779
780 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
781 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
782 timeout, cmd_flags);
783
784 /* start of retry loop */
785 do {
786 struct request *rq;
787 int error;
788
789 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
790
791 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
792 rq->cmd_type = REQ_TYPE_ATA_PC;
793 rq->sense = sense;
794 rq->cmd_flags |= cmd_flags;
795 rq->timeout = timeout;
796 if (buffer) {
797 rq->data = buffer;
798 rq->data_len = *bufflen;
799 }
800
801 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
802
803 if (buffer)
804 *bufflen = rq->data_len;
805
806 flags = rq->cmd_flags;
807 blk_put_request(rq);
808
809 /*
810 * FIXME: we should probably abort/retry or something in case of
811 * failure.
812 */
813 if (flags & REQ_FAILED) {
814 /*
815 * The request failed. Retry if it was due to a unit
816 * attention status (usually means media was changed).
817 */
818 struct request_sense *reqbuf = sense;
819
820 if (reqbuf->sense_key == UNIT_ATTENTION)
821 cdrom_saw_media_change(drive);
822 else if (reqbuf->sense_key == NOT_READY &&
823 reqbuf->asc == 4 && reqbuf->ascq != 4) {
824 /*
825 * The drive is in the process of loading
826 * a disk. Retry, but wait a little to give
827 * the drive time to complete the load.
828 */
829 ssleep(2);
830 } else {
831 /* otherwise, don't retry */
832 retries = 0;
833 }
834 --retries;
835 }
836
837 /* end of retry loop */
838 } while ((flags & REQ_FAILED) && retries >= 0);
839
840 /* return an error if the command failed */
841 return (flags & REQ_FAILED) ? -EIO : 0;
842 }
843
844 /*
845 * Called from blk_end_request_callback() after the data of the request is
846 * completed and before the request itself is completed. By returning value '1',
847 * blk_end_request_callback() returns immediately without completing it.
848 */
849 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
850 {
851 return 1;
852 }
853
854 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
855 {
856 ide_hwif_t *hwif = drive->hwif;
857 ide_hwgroup_t *hwgroup = hwif->hwgroup;
858 struct request *rq = hwgroup->rq;
859 xfer_func_t *xferfunc;
860 ide_expiry_t *expiry = NULL;
861 int dma_error = 0, dma, stat, thislen, uptodate = 0;
862 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
863 unsigned int timeout;
864 u16 len;
865 u8 ireason;
866
867 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
868 __func__, rq->cmd[0], write);
869
870 /* check for errors */
871 dma = drive->dma;
872 if (dma) {
873 drive->dma = 0;
874 dma_error = hwif->dma_ops->dma_end(drive);
875 if (dma_error) {
876 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
877 write ? "write" : "read");
878 ide_dma_off(drive);
879 }
880 }
881
882 if (cdrom_decode_status(drive, 0, &stat))
883 return ide_stopped;
884
885 /* using dma, transfer is complete now */
886 if (dma) {
887 if (dma_error)
888 return ide_error(drive, "dma error", stat);
889 if (blk_fs_request(rq)) {
890 ide_end_request(drive, 1, rq->nr_sectors);
891 return ide_stopped;
892 }
893 goto end_request;
894 }
895
896 ide_read_bcount_and_ireason(drive, &len, &ireason);
897
898 thislen = blk_fs_request(rq) ? len : rq->data_len;
899 if (thislen > len)
900 thislen = len;
901
902 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
903 __func__, stat, thislen);
904
905 /* If DRQ is clear, the command has completed. */
906 if ((stat & ATA_DRQ) == 0) {
907 if (blk_fs_request(rq)) {
908 /*
909 * If we're not done reading/writing, complain.
910 * Otherwise, complete the command normally.
911 */
912 uptodate = 1;
913 if (rq->current_nr_sectors > 0) {
914 printk(KERN_ERR PFX "%s: %s: data underrun "
915 "(%d blocks)\n",
916 drive->name, __func__,
917 rq->current_nr_sectors);
918 if (!write)
919 rq->cmd_flags |= REQ_FAILED;
920 uptodate = 0;
921 }
922 cdrom_end_request(drive, uptodate);
923 return ide_stopped;
924 } else if (!blk_pc_request(rq)) {
925 ide_cd_request_sense_fixup(drive, rq);
926 /* complain if we still have data left to transfer */
927 uptodate = rq->data_len ? 0 : 1;
928 }
929 goto end_request;
930 }
931
932 /* check which way to transfer data */
933 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
934 return ide_stopped;
935
936 if (blk_fs_request(rq)) {
937 if (write == 0) {
938 int nskip;
939
940 if (ide_cd_check_transfer_size(drive, len)) {
941 cdrom_end_request(drive, 0);
942 return ide_stopped;
943 }
944
945 /*
946 * First, figure out if we need to bit-bucket
947 * any of the leading sectors.
948 */
949 nskip = min_t(int, rq->current_nr_sectors
950 - bio_cur_sectors(rq->bio),
951 thislen >> 9);
952 if (nskip > 0) {
953 ide_pad_transfer(drive, write, nskip << 9);
954 rq->current_nr_sectors -= nskip;
955 thislen -= (nskip << 9);
956 }
957 }
958 }
959
960 if (ireason == 0) {
961 write = 1;
962 xferfunc = hwif->tp_ops->output_data;
963 } else {
964 write = 0;
965 xferfunc = hwif->tp_ops->input_data;
966 }
967
968 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
969 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
970
971 /* transfer data */
972 while (thislen > 0) {
973 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
974 int blen = rq->data_len;
975
976 /* bio backed? */
977 if (rq->bio) {
978 if (blk_fs_request(rq)) {
979 ptr = rq->buffer;
980 blen = rq->current_nr_sectors << 9;
981 } else {
982 ptr = bio_data(rq->bio);
983 blen = bio_iovec(rq->bio)->bv_len;
984 }
985 }
986
987 if (!ptr) {
988 if (blk_fs_request(rq) && !write)
989 /*
990 * If the buffers are full, pipe the rest into
991 * oblivion.
992 */
993 ide_pad_transfer(drive, 0, thislen);
994 else {
995 printk(KERN_ERR PFX "%s: confused, missing data\n",
996 drive->name);
997 blk_dump_rq_flags(rq, rq_data_dir(rq)
998 ? "cdrom_newpc_intr, write"
999 : "cdrom_newpc_intr, read");
1000 }
1001 break;
1002 }
1003
1004 if (blen > thislen)
1005 blen = thislen;
1006
1007 xferfunc(drive, NULL, ptr, blen);
1008
1009 thislen -= blen;
1010 len -= blen;
1011
1012 if (blk_fs_request(rq)) {
1013 rq->buffer += blen;
1014 rq->nr_sectors -= (blen >> 9);
1015 rq->current_nr_sectors -= (blen >> 9);
1016 rq->sector += (blen >> 9);
1017
1018 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1019 cdrom_end_request(drive, 1);
1020 } else {
1021 rq->data_len -= blen;
1022
1023 /*
1024 * The request can't be completed until DRQ is cleared.
1025 * So complete the data, but don't complete the request
1026 * using the dummy function for the callback feature
1027 * of blk_end_request_callback().
1028 */
1029 if (rq->bio)
1030 blk_end_request_callback(rq, 0, blen,
1031 cdrom_newpc_intr_dummy_cb);
1032 else
1033 rq->data += blen;
1034 }
1035 if (!write && blk_sense_request(rq))
1036 rq->sense_len += blen;
1037 }
1038
1039 /* pad, if necessary */
1040 if (!blk_fs_request(rq) && len > 0)
1041 ide_pad_transfer(drive, write, len);
1042
1043 if (blk_pc_request(rq)) {
1044 timeout = rq->timeout;
1045 } else {
1046 timeout = ATAPI_WAIT_PC;
1047 if (!blk_fs_request(rq))
1048 expiry = ide_cd_expiry;
1049 }
1050
1051 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1052 return ide_started;
1053
1054 end_request:
1055 if (blk_pc_request(rq)) {
1056 unsigned int dlen = rq->data_len;
1057
1058 if (dma)
1059 rq->data_len = 0;
1060
1061 if (blk_end_request(rq, 0, dlen))
1062 BUG();
1063
1064 hwgroup->rq = NULL;
1065 } else {
1066 if (!uptodate)
1067 rq->cmd_flags |= REQ_FAILED;
1068 cdrom_end_request(drive, uptodate);
1069 }
1070 return ide_stopped;
1071 }
1072
1073 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1074 {
1075 struct cdrom_info *cd = drive->driver_data;
1076 int write = rq_data_dir(rq) == WRITE;
1077 unsigned short sectors_per_frame =
1078 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1079
1080 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1081 "secs_per_frame: %u\n",
1082 __func__, rq->cmd[0], write, sectors_per_frame);
1083
1084 if (write) {
1085 /* disk has become write protected */
1086 if (get_disk_ro(cd->disk)) {
1087 cdrom_end_request(drive, 0);
1088 return ide_stopped;
1089 }
1090 } else {
1091 /*
1092 * We may be retrying this request after an error. Fix up any
1093 * weirdness which might be present in the request packet.
1094 */
1095 ide_cd_restore_request(drive, rq);
1096 }
1097
1098 /* use DMA, if possible / writes *must* be hardware frame aligned */
1099 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1100 (rq->sector & (sectors_per_frame - 1))) {
1101 if (write) {
1102 cdrom_end_request(drive, 0);
1103 return ide_stopped;
1104 }
1105 drive->dma = 0;
1106 } else
1107 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1108
1109 if (write)
1110 cd->devinfo.media_written = 1;
1111
1112 return ide_started;
1113 }
1114
1115 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1116 {
1117
1118 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1119 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1120 rq->cmd_type);
1121
1122 if (blk_pc_request(rq))
1123 rq->cmd_flags |= REQ_QUIET;
1124 else
1125 rq->cmd_flags &= ~REQ_FAILED;
1126
1127 drive->dma = 0;
1128
1129 /* sg request */
1130 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1131 struct request_queue *q = drive->queue;
1132 unsigned int alignment;
1133 char *buf;
1134
1135 if (rq->bio)
1136 buf = bio_data(rq->bio);
1137 else
1138 buf = rq->data;
1139
1140 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1141
1142 /*
1143 * check if dma is safe
1144 *
1145 * NOTE! The "len" and "addr" checks should possibly have
1146 * separate masks.
1147 */
1148 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1149 if ((unsigned long)buf & alignment
1150 || rq->data_len & q->dma_pad_mask
1151 || object_is_on_stack(buf))
1152 drive->dma = 0;
1153 }
1154 }
1155
1156 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1157 sector_t block)
1158 {
1159 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1160 "rq->cmd_type: 0x%x, block: %llu\n",
1161 __func__, rq->cmd[0], rq->cmd_type,
1162 (unsigned long long)block);
1163
1164 if (blk_fs_request(rq)) {
1165 if (cdrom_start_rw(drive, rq) == ide_stopped)
1166 return ide_stopped;
1167
1168 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1169 return ide_stopped;
1170 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1171 rq->cmd_type == REQ_TYPE_ATA_PC) {
1172 if (!rq->timeout)
1173 rq->timeout = ATAPI_WAIT_PC;
1174
1175 cdrom_do_block_pc(drive, rq);
1176 } else if (blk_special_request(rq)) {
1177 /* right now this can only be a reset... */
1178 cdrom_end_request(drive, 1);
1179 return ide_stopped;
1180 } else {
1181 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1182 cdrom_end_request(drive, 0);
1183 return ide_stopped;
1184 }
1185
1186 return cdrom_start_packet_command(drive);
1187 }
1188
1189 /*
1190 * Ioctl handling.
1191 *
1192 * Routines which queue packet commands take as a final argument a pointer to a
1193 * request_sense struct. If execution of the command results in an error with a
1194 * CHECK CONDITION status, this structure will be filled with the results of the
1195 * subsequent request sense command. The pointer can also be NULL, in which case
1196 * no sense information is returned.
1197 */
1198 static void msf_from_bcd(struct atapi_msf *msf)
1199 {
1200 msf->minute = bcd2bin(msf->minute);
1201 msf->second = bcd2bin(msf->second);
1202 msf->frame = bcd2bin(msf->frame);
1203 }
1204
1205 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1206 {
1207 struct cdrom_info *info = drive->driver_data;
1208 struct cdrom_device_info *cdi = &info->devinfo;
1209 unsigned char cmd[BLK_MAX_CDB];
1210
1211 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1212
1213 memset(cmd, 0, BLK_MAX_CDB);
1214 cmd[0] = GPCMD_TEST_UNIT_READY;
1215
1216 /*
1217 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1218 * instead of supporting the LOAD_UNLOAD opcode.
1219 */
1220 cmd[7] = cdi->sanyo_slot % 3;
1221
1222 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1223 }
1224
1225 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1226 unsigned long *sectors_per_frame,
1227 struct request_sense *sense)
1228 {
1229 struct {
1230 __be32 lba;
1231 __be32 blocklen;
1232 } capbuf;
1233
1234 int stat;
1235 unsigned char cmd[BLK_MAX_CDB];
1236 unsigned len = sizeof(capbuf);
1237 u32 blocklen;
1238
1239 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1240
1241 memset(cmd, 0, BLK_MAX_CDB);
1242 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1243
1244 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1245 REQ_QUIET);
1246 if (stat)
1247 return stat;
1248
1249 /*
1250 * Sanity check the given block size
1251 */
1252 blocklen = be32_to_cpu(capbuf.blocklen);
1253 switch (blocklen) {
1254 case 512:
1255 case 1024:
1256 case 2048:
1257 case 4096:
1258 break;
1259 default:
1260 printk(KERN_ERR PFX "%s: weird block size %u\n",
1261 drive->name, blocklen);
1262 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1263 drive->name);
1264 blocklen = 2048;
1265 break;
1266 }
1267
1268 *capacity = 1 + be32_to_cpu(capbuf.lba);
1269 *sectors_per_frame = blocklen >> SECTOR_BITS;
1270
1271 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1272 __func__, *capacity, *sectors_per_frame);
1273
1274 return 0;
1275 }
1276
1277 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1278 int format, char *buf, int buflen,
1279 struct request_sense *sense)
1280 {
1281 unsigned char cmd[BLK_MAX_CDB];
1282
1283 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1284
1285 memset(cmd, 0, BLK_MAX_CDB);
1286
1287 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1288 cmd[6] = trackno;
1289 cmd[7] = (buflen >> 8);
1290 cmd[8] = (buflen & 0xff);
1291 cmd[9] = (format << 6);
1292
1293 if (msf_flag)
1294 cmd[1] = 2;
1295
1296 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1297 }
1298
1299 /* Try to read the entire TOC for the disk into our internal buffer. */
1300 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1301 {
1302 int stat, ntracks, i;
1303 struct cdrom_info *info = drive->driver_data;
1304 struct cdrom_device_info *cdi = &info->devinfo;
1305 struct atapi_toc *toc = info->toc;
1306 struct {
1307 struct atapi_toc_header hdr;
1308 struct atapi_toc_entry ent;
1309 } ms_tmp;
1310 long last_written;
1311 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1312
1313 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1314
1315 if (toc == NULL) {
1316 /* try to allocate space */
1317 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1318 if (toc == NULL) {
1319 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1320 drive->name);
1321 return -ENOMEM;
1322 }
1323 info->toc = toc;
1324 }
1325
1326 /*
1327 * Check to see if the existing data is still valid. If it is,
1328 * just return.
1329 */
1330 (void) cdrom_check_status(drive, sense);
1331
1332 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1333 return 0;
1334
1335 /* try to get the total cdrom capacity and sector size */
1336 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1337 sense);
1338 if (stat)
1339 toc->capacity = 0x1fffff;
1340
1341 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1342 /* save a private copy of the TOC capacity for error handling */
1343 drive->probed_capacity = toc->capacity * sectors_per_frame;
1344
1345 blk_queue_hardsect_size(drive->queue,
1346 sectors_per_frame << SECTOR_BITS);
1347
1348 /* first read just the header, so we know how long the TOC is */
1349 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1350 sizeof(struct atapi_toc_header), sense);
1351 if (stat)
1352 return stat;
1353
1354 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1355 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1356 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1357 }
1358
1359 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1360 if (ntracks <= 0)
1361 return -EIO;
1362 if (ntracks > MAX_TRACKS)
1363 ntracks = MAX_TRACKS;
1364
1365 /* now read the whole schmeer */
1366 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1367 (char *)&toc->hdr,
1368 sizeof(struct atapi_toc_header) +
1369 (ntracks + 1) *
1370 sizeof(struct atapi_toc_entry), sense);
1371
1372 if (stat && toc->hdr.first_track > 1) {
1373 /*
1374 * Cds with CDI tracks only don't have any TOC entries, despite
1375 * of this the returned values are
1376 * first_track == last_track = number of CDI tracks + 1,
1377 * so that this case is indistinguishable from the same layout
1378 * plus an additional audio track. If we get an error for the
1379 * regular case, we assume a CDI without additional audio
1380 * tracks. In this case the readable TOC is empty (CDI tracks
1381 * are not included) and only holds the Leadout entry.
1382 *
1383 * Heiko Eißfeldt.
1384 */
1385 ntracks = 0;
1386 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1387 (char *)&toc->hdr,
1388 sizeof(struct atapi_toc_header) +
1389 (ntracks + 1) *
1390 sizeof(struct atapi_toc_entry),
1391 sense);
1392 if (stat)
1393 return stat;
1394
1395 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1396 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1397 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1398 } else {
1399 toc->hdr.first_track = CDROM_LEADOUT;
1400 toc->hdr.last_track = CDROM_LEADOUT;
1401 }
1402 }
1403
1404 if (stat)
1405 return stat;
1406
1407 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1408
1409 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1410 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1411 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1412 }
1413
1414 for (i = 0; i <= ntracks; i++) {
1415 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1416 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1417 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1418 msf_from_bcd(&toc->ent[i].addr.msf);
1419 }
1420 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1421 toc->ent[i].addr.msf.second,
1422 toc->ent[i].addr.msf.frame);
1423 }
1424
1425 if (toc->hdr.first_track != CDROM_LEADOUT) {
1426 /* read the multisession information */
1427 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1428 sizeof(ms_tmp), sense);
1429 if (stat)
1430 return stat;
1431
1432 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1433 } else {
1434 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1435 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1436 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1437 }
1438
1439 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1440 /* re-read multisession information using MSF format */
1441 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1442 sizeof(ms_tmp), sense);
1443 if (stat)
1444 return stat;
1445
1446 msf_from_bcd(&ms_tmp.ent.addr.msf);
1447 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1448 ms_tmp.ent.addr.msf.second,
1449 ms_tmp.ent.addr.msf.frame);
1450 }
1451
1452 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1453
1454 /* now try to get the total cdrom capacity */
1455 stat = cdrom_get_last_written(cdi, &last_written);
1456 if (!stat && (last_written > toc->capacity)) {
1457 toc->capacity = last_written;
1458 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1459 drive->probed_capacity = toc->capacity * sectors_per_frame;
1460 }
1461
1462 /* Remember that we've read this stuff. */
1463 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1464
1465 return 0;
1466 }
1467
1468 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1469 {
1470 struct cdrom_info *info = drive->driver_data;
1471 struct cdrom_device_info *cdi = &info->devinfo;
1472 struct packet_command cgc;
1473 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1474
1475 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1476
1477 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1478 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1479
1480 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1481 do {
1482 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1483 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1484 if (!stat)
1485 break;
1486 } while (--attempts);
1487 return stat;
1488 }
1489
1490 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1491 {
1492 struct cdrom_info *cd = drive->driver_data;
1493 u16 curspeed, maxspeed;
1494
1495 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1496
1497 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1498 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1499 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1500 } else {
1501 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1502 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1503 }
1504
1505 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1506 __func__, curspeed, maxspeed);
1507
1508 cd->current_speed = (curspeed + (176/2)) / 176;
1509 cd->max_speed = (maxspeed + (176/2)) / 176;
1510 }
1511
1512 #define IDE_CD_CAPABILITIES \
1513 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1514 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1515 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1516 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1517 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1518
1519 static struct cdrom_device_ops ide_cdrom_dops = {
1520 .open = ide_cdrom_open_real,
1521 .release = ide_cdrom_release_real,
1522 .drive_status = ide_cdrom_drive_status,
1523 .media_changed = ide_cdrom_check_media_change_real,
1524 .tray_move = ide_cdrom_tray_move,
1525 .lock_door = ide_cdrom_lock_door,
1526 .select_speed = ide_cdrom_select_speed,
1527 .get_last_session = ide_cdrom_get_last_session,
1528 .get_mcn = ide_cdrom_get_mcn,
1529 .reset = ide_cdrom_reset,
1530 .audio_ioctl = ide_cdrom_audio_ioctl,
1531 .capability = IDE_CD_CAPABILITIES,
1532 .generic_packet = ide_cdrom_packet,
1533 };
1534
1535 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1536 {
1537 struct cdrom_info *info = drive->driver_data;
1538 struct cdrom_device_info *devinfo = &info->devinfo;
1539
1540 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1541
1542 devinfo->ops = &ide_cdrom_dops;
1543 devinfo->speed = info->current_speed;
1544 devinfo->capacity = nslots;
1545 devinfo->handle = drive;
1546 strcpy(devinfo->name, drive->name);
1547
1548 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1549 devinfo->mask |= CDC_SELECT_SPEED;
1550
1551 devinfo->disk = info->disk;
1552 return register_cdrom(devinfo);
1553 }
1554
1555 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1556 {
1557 struct cdrom_info *cd = drive->driver_data;
1558 struct cdrom_device_info *cdi = &cd->devinfo;
1559 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1560 mechtype_t mechtype;
1561 int nslots = 1;
1562
1563 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1564 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1565 drive->atapi_flags);
1566
1567 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1568 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1569 CDC_MO_DRIVE | CDC_RAM);
1570
1571 if (drive->media == ide_optical) {
1572 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1573 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1574 drive->name);
1575 return nslots;
1576 }
1577
1578 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1579 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1580 cdi->mask &= ~CDC_PLAY_AUDIO;
1581 return nslots;
1582 }
1583
1584 /*
1585 * We have to cheat a little here. the packet will eventually be queued
1586 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1587 * Since this device hasn't been registered with the Uniform layer yet,
1588 * it can't do this. Same goes for cdi->ops.
1589 */
1590 cdi->handle = drive;
1591 cdi->ops = &ide_cdrom_dops;
1592
1593 if (ide_cdrom_get_capabilities(drive, buf))
1594 return 0;
1595
1596 if ((buf[8 + 6] & 0x01) == 0)
1597 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1598 if (buf[8 + 6] & 0x08)
1599 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1600 if (buf[8 + 3] & 0x01)
1601 cdi->mask &= ~CDC_CD_R;
1602 if (buf[8 + 3] & 0x02)
1603 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1604 if (buf[8 + 2] & 0x38)
1605 cdi->mask &= ~CDC_DVD;
1606 if (buf[8 + 3] & 0x20)
1607 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1608 if (buf[8 + 3] & 0x10)
1609 cdi->mask &= ~CDC_DVD_R;
1610 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1611 cdi->mask &= ~CDC_PLAY_AUDIO;
1612
1613 mechtype = buf[8 + 6] >> 5;
1614 if (mechtype == mechtype_caddy ||
1615 mechtype == mechtype_popup ||
1616 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1617 cdi->mask |= CDC_CLOSE_TRAY;
1618
1619 if (cdi->sanyo_slot > 0) {
1620 cdi->mask &= ~CDC_SELECT_DISC;
1621 nslots = 3;
1622 } else if (mechtype == mechtype_individual_changer ||
1623 mechtype == mechtype_cartridge_changer) {
1624 nslots = cdrom_number_of_slots(cdi);
1625 if (nslots > 1)
1626 cdi->mask &= ~CDC_SELECT_DISC;
1627 }
1628
1629 ide_cdrom_update_speed(drive, buf);
1630
1631 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1632
1633 /* don't print speed if the drive reported 0 */
1634 if (cd->max_speed)
1635 printk(KERN_CONT " %dX", cd->max_speed);
1636
1637 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1638
1639 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1640 printk(KERN_CONT " DVD%s%s",
1641 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1642 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1643
1644 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1645 printk(KERN_CONT " CD%s%s",
1646 (cdi->mask & CDC_CD_R) ? "" : "-R",
1647 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1648
1649 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1650 printk(KERN_CONT " changer w/%d slots", nslots);
1651 else
1652 printk(KERN_CONT " drive");
1653
1654 printk(KERN_CONT ", %dkB Cache\n",
1655 be16_to_cpup((__be16 *)&buf[8 + 12]));
1656
1657 return nslots;
1658 }
1659
1660 /* standard prep_rq_fn that builds 10 byte cmds */
1661 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1662 {
1663 int hard_sect = queue_hardsect_size(q);
1664 long block = (long)rq->hard_sector / (hard_sect >> 9);
1665 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1666
1667 memset(rq->cmd, 0, BLK_MAX_CDB);
1668
1669 if (rq_data_dir(rq) == READ)
1670 rq->cmd[0] = GPCMD_READ_10;
1671 else
1672 rq->cmd[0] = GPCMD_WRITE_10;
1673
1674 /*
1675 * fill in lba
1676 */
1677 rq->cmd[2] = (block >> 24) & 0xff;
1678 rq->cmd[3] = (block >> 16) & 0xff;
1679 rq->cmd[4] = (block >> 8) & 0xff;
1680 rq->cmd[5] = block & 0xff;
1681
1682 /*
1683 * and transfer length
1684 */
1685 rq->cmd[7] = (blocks >> 8) & 0xff;
1686 rq->cmd[8] = blocks & 0xff;
1687 rq->cmd_len = 10;
1688 return BLKPREP_OK;
1689 }
1690
1691 /*
1692 * Most of the SCSI commands are supported directly by ATAPI devices.
1693 * This transform handles the few exceptions.
1694 */
1695 static int ide_cdrom_prep_pc(struct request *rq)
1696 {
1697 u8 *c = rq->cmd;
1698
1699 /* transform 6-byte read/write commands to the 10-byte version */
1700 if (c[0] == READ_6 || c[0] == WRITE_6) {
1701 c[8] = c[4];
1702 c[5] = c[3];
1703 c[4] = c[2];
1704 c[3] = c[1] & 0x1f;
1705 c[2] = 0;
1706 c[1] &= 0xe0;
1707 c[0] += (READ_10 - READ_6);
1708 rq->cmd_len = 10;
1709 return BLKPREP_OK;
1710 }
1711
1712 /*
1713 * it's silly to pretend we understand 6-byte sense commands, just
1714 * reject with ILLEGAL_REQUEST and the caller should take the
1715 * appropriate action
1716 */
1717 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1718 rq->errors = ILLEGAL_REQUEST;
1719 return BLKPREP_KILL;
1720 }
1721
1722 return BLKPREP_OK;
1723 }
1724
1725 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1726 {
1727 if (blk_fs_request(rq))
1728 return ide_cdrom_prep_fs(q, rq);
1729 else if (blk_pc_request(rq))
1730 return ide_cdrom_prep_pc(rq);
1731
1732 return 0;
1733 }
1734
1735 struct cd_list_entry {
1736 const char *id_model;
1737 const char *id_firmware;
1738 unsigned int cd_flags;
1739 };
1740
1741 #ifdef CONFIG_IDE_PROC_FS
1742 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1743 {
1744 unsigned long capacity, sectors_per_frame;
1745
1746 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1747 return 0;
1748
1749 return capacity * sectors_per_frame;
1750 }
1751
1752 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1753 int count, int *eof, void *data)
1754 {
1755 ide_drive_t *drive = data;
1756 int len;
1757
1758 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1759 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1760 }
1761
1762 static ide_proc_entry_t idecd_proc[] = {
1763 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1764 { NULL, 0, NULL, NULL }
1765 };
1766
1767 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1768 {
1769 return idecd_proc;
1770 }
1771
1772 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1773 {
1774 return NULL;
1775 }
1776 #endif
1777
1778 static const struct cd_list_entry ide_cd_quirks_list[] = {
1779 /* Limit transfer size per interrupt. */
1780 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1781 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1782 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1783 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1784 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1785 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1786 IDE_AFLAG_PRE_ATAPI12, },
1787 /* Vertos 300, some versions of this drive like to talk BCD. */
1788 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1789 /* Vertos 600 ESD. */
1790 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1791 /*
1792 * Sanyo 3 CD changer uses a non-standard command for CD changing
1793 * (by default standard ATAPI support for CD changers is used).
1794 */
1795 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1796 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1797 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1798 /* Stingray 8X CD-ROM. */
1799 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1800 /*
1801 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1802 * mode sense page capabilities size, but older drives break.
1803 */
1804 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1805 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1806 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1807 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1808 /*
1809 * Some drives used by Apple don't advertise audio play
1810 * but they do support reading TOC & audio datas.
1811 */
1812 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1813 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1814 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1815 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1816 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1817 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1818 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1819 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1820 { NULL, NULL, 0 }
1821 };
1822
1823 static unsigned int ide_cd_flags(u16 *id)
1824 {
1825 const struct cd_list_entry *cle = ide_cd_quirks_list;
1826
1827 while (cle->id_model) {
1828 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1829 (cle->id_firmware == NULL ||
1830 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1831 return cle->cd_flags;
1832 cle++;
1833 }
1834
1835 return 0;
1836 }
1837
1838 static int ide_cdrom_setup(ide_drive_t *drive)
1839 {
1840 struct cdrom_info *cd = drive->driver_data;
1841 struct cdrom_device_info *cdi = &cd->devinfo;
1842 u16 *id = drive->id;
1843 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1844 int nslots;
1845
1846 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1847
1848 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1849 blk_queue_dma_alignment(drive->queue, 31);
1850 blk_queue_update_dma_pad(drive->queue, 15);
1851 drive->queue->unplug_delay = (1 * HZ) / 1000;
1852 if (!drive->queue->unplug_delay)
1853 drive->queue->unplug_delay = 1;
1854
1855 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1856 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1857
1858 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1859 fw_rev[4] == '1' && fw_rev[6] <= '2')
1860 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1861 IDE_AFLAG_TOCADDR_AS_BCD);
1862 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1863 fw_rev[4] == '1' && fw_rev[6] <= '2')
1864 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1865 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1866 /* 3 => use CD in slot 0 */
1867 cdi->sanyo_slot = 3;
1868
1869 nslots = ide_cdrom_probe_capabilities(drive);
1870
1871 /* set correct block size */
1872 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1873
1874 if (ide_cdrom_register(drive, nslots)) {
1875 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1876 " cdrom driver.\n", drive->name, __func__);
1877 cd->devinfo.handle = NULL;
1878 return 1;
1879 }
1880
1881 ide_proc_register_driver(drive, cd->driver);
1882 return 0;
1883 }
1884
1885 static void ide_cd_remove(ide_drive_t *drive)
1886 {
1887 struct cdrom_info *info = drive->driver_data;
1888
1889 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1890
1891 ide_proc_unregister_driver(drive, info->driver);
1892
1893 del_gendisk(info->disk);
1894
1895 ide_cd_put(info);
1896 }
1897
1898 static void ide_cd_release(struct kref *kref)
1899 {
1900 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1901 struct cdrom_device_info *devinfo = &info->devinfo;
1902 ide_drive_t *drive = info->drive;
1903 struct gendisk *g = info->disk;
1904
1905 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1906
1907 kfree(info->toc);
1908 if (devinfo->handle == drive)
1909 unregister_cdrom(devinfo);
1910 drive->driver_data = NULL;
1911 blk_queue_prep_rq(drive->queue, NULL);
1912 g->private_data = NULL;
1913 put_disk(g);
1914 kfree(info);
1915 }
1916
1917 static int ide_cd_probe(ide_drive_t *);
1918
1919 static ide_driver_t ide_cdrom_driver = {
1920 .gen_driver = {
1921 .owner = THIS_MODULE,
1922 .name = "ide-cdrom",
1923 .bus = &ide_bus_type,
1924 },
1925 .probe = ide_cd_probe,
1926 .remove = ide_cd_remove,
1927 .version = IDECD_VERSION,
1928 .do_request = ide_cd_do_request,
1929 .end_request = ide_end_request,
1930 .error = __ide_error,
1931 #ifdef CONFIG_IDE_PROC_FS
1932 .proc_entries = ide_cd_proc_entries,
1933 .proc_devsets = ide_cd_proc_devsets,
1934 #endif
1935 };
1936
1937 static int idecd_open(struct block_device *bdev, fmode_t mode)
1938 {
1939 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1940 int rc = -ENOMEM;
1941
1942 if (!info)
1943 return -ENXIO;
1944
1945 rc = cdrom_open(&info->devinfo, bdev, mode);
1946
1947 if (rc < 0)
1948 ide_cd_put(info);
1949
1950 return rc;
1951 }
1952
1953 static int idecd_release(struct gendisk *disk, fmode_t mode)
1954 {
1955 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1956
1957 cdrom_release(&info->devinfo, mode);
1958
1959 ide_cd_put(info);
1960
1961 return 0;
1962 }
1963
1964 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1965 {
1966 struct packet_command cgc;
1967 char buffer[16];
1968 int stat;
1969 char spindown;
1970
1971 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1972 return -EFAULT;
1973
1974 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1975
1976 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1977 if (stat)
1978 return stat;
1979
1980 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1981 return cdrom_mode_select(cdi, &cgc);
1982 }
1983
1984 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1985 {
1986 struct packet_command cgc;
1987 char buffer[16];
1988 int stat;
1989 char spindown;
1990
1991 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1992
1993 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1994 if (stat)
1995 return stat;
1996
1997 spindown = buffer[11] & 0x0f;
1998 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1999 return -EFAULT;
2000 return 0;
2001 }
2002
2003 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2004 unsigned int cmd, unsigned long arg)
2005 {
2006 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2007 int err;
2008
2009 switch (cmd) {
2010 case CDROMSETSPINDOWN:
2011 return idecd_set_spindown(&info->devinfo, arg);
2012 case CDROMGETSPINDOWN:
2013 return idecd_get_spindown(&info->devinfo, arg);
2014 default:
2015 break;
2016 }
2017
2018 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2019 if (err == -EINVAL)
2020 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2021
2022 return err;
2023 }
2024
2025 static int idecd_media_changed(struct gendisk *disk)
2026 {
2027 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2028 return cdrom_media_changed(&info->devinfo);
2029 }
2030
2031 static int idecd_revalidate_disk(struct gendisk *disk)
2032 {
2033 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2034 struct request_sense sense;
2035
2036 ide_cd_read_toc(info->drive, &sense);
2037
2038 return 0;
2039 }
2040
2041 static struct block_device_operations idecd_ops = {
2042 .owner = THIS_MODULE,
2043 .open = idecd_open,
2044 .release = idecd_release,
2045 .locked_ioctl = idecd_ioctl,
2046 .media_changed = idecd_media_changed,
2047 .revalidate_disk = idecd_revalidate_disk
2048 };
2049
2050 /* module options */
2051 static char *ignore;
2052 module_param(ignore, charp, 0400);
2053
2054 static unsigned long debug_mask;
2055 module_param(debug_mask, ulong, 0644);
2056
2057 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2058
2059 static int ide_cd_probe(ide_drive_t *drive)
2060 {
2061 struct cdrom_info *info;
2062 struct gendisk *g;
2063 struct request_sense sense;
2064
2065 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2066 "drive->media: 0x%x\n", __func__, drive->driver_req,
2067 drive->media);
2068
2069 if (!strstr("ide-cdrom", drive->driver_req))
2070 goto failed;
2071
2072 if (drive->media != ide_cdrom && drive->media != ide_optical)
2073 goto failed;
2074
2075 /* skip drives that we were told to ignore */
2076 if (ignore != NULL) {
2077 if (strstr(ignore, drive->name)) {
2078 printk(KERN_INFO PFX "ignoring drive %s\n",
2079 drive->name);
2080 goto failed;
2081 }
2082 }
2083
2084 drive->debug_mask = debug_mask;
2085
2086 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2087 if (info == NULL) {
2088 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2089 drive->name);
2090 goto failed;
2091 }
2092
2093 g = alloc_disk(1 << PARTN_BITS);
2094 if (!g)
2095 goto out_free_cd;
2096
2097 ide_init_disk(g, drive);
2098
2099 kref_init(&info->kref);
2100
2101 info->drive = drive;
2102 info->driver = &ide_cdrom_driver;
2103 info->disk = g;
2104
2105 g->private_data = &info->driver;
2106
2107 drive->driver_data = info;
2108
2109 g->minors = 1;
2110 g->driverfs_dev = &drive->gendev;
2111 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2112 if (ide_cdrom_setup(drive)) {
2113 ide_cd_release(&info->kref);
2114 goto failed;
2115 }
2116
2117 ide_cd_read_toc(drive, &sense);
2118 g->fops = &idecd_ops;
2119 g->flags |= GENHD_FL_REMOVABLE;
2120 add_disk(g);
2121 return 0;
2122
2123 out_free_cd:
2124 kfree(info);
2125 failed:
2126 return -ENODEV;
2127 }
2128
2129 static void __exit ide_cdrom_exit(void)
2130 {
2131 driver_unregister(&ide_cdrom_driver.gen_driver);
2132 }
2133
2134 static int __init ide_cdrom_init(void)
2135 {
2136 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2137 return driver_register(&ide_cdrom_driver.gen_driver);
2138 }
2139
2140 MODULE_ALIAS("ide:*m-cdrom*");
2141 MODULE_ALIAS("ide-cd");
2142 module_init(ide_cdrom_init);
2143 module_exit(ide_cdrom_exit);
2144 MODULE_LICENSE("GPL");
linux kernel for loongson