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ide: remove ide_driver_t typedef
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 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 = drive->hwif->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 struct request *rq = hwif->rq;
310 int stat, err, sense_key;
311
312 /* check for errors */
313 stat = hwif->tp_ops->read_status(hwif);
314
315 if (stat_ret)
316 *stat_ret = stat;
317
318 if (OK_STAT(stat, good_stat, BAD_R_STAT))
319 return 0;
320
321 /* get the IDE error register */
322 err = ide_read_error(drive);
323 sense_key = err >> 4;
324
325 if (rq == NULL) {
326 printk(KERN_ERR PFX "%s: missing rq in %s\n",
327 drive->name, __func__);
328 return 1;
329 }
330
331 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
332 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
333 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
334
335 if (blk_sense_request(rq)) {
336 /*
337 * We got an error trying to get sense info from the drive
338 * (probably while trying to recover from a former error).
339 * Just give up.
340 */
341 rq->cmd_flags |= REQ_FAILED;
342 cdrom_end_request(drive, 0);
343 ide_error(drive, "request sense failure", stat);
344 return 1;
345
346 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
347 /* All other functions, except for READ. */
348
349 /*
350 * if we have an error, pass back CHECK_CONDITION as the
351 * scsi status byte
352 */
353 if (blk_pc_request(rq) && !rq->errors)
354 rq->errors = SAM_STAT_CHECK_CONDITION;
355
356 /* check for tray open */
357 if (sense_key == NOT_READY) {
358 cdrom_saw_media_change(drive);
359 } else if (sense_key == UNIT_ATTENTION) {
360 /* check for media change */
361 cdrom_saw_media_change(drive);
362 return 0;
363 } else if (sense_key == ILLEGAL_REQUEST &&
364 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
365 /*
366 * Don't print error message for this condition--
367 * SFF8090i indicates that 5/24/00 is the correct
368 * response to a request to close the tray if the
369 * drive doesn't have that capability.
370 * cdrom_log_sense() knows this!
371 */
372 } else if (!(rq->cmd_flags & REQ_QUIET)) {
373 /* otherwise, print an error */
374 ide_dump_status(drive, "packet command error", stat);
375 }
376
377 rq->cmd_flags |= REQ_FAILED;
378
379 /*
380 * instead of playing games with moving completions around,
381 * remove failed request completely and end it when the
382 * request sense has completed
383 */
384 goto end_request;
385
386 } else if (blk_fs_request(rq)) {
387 int do_end_request = 0;
388
389 /* handle errors from READ and WRITE requests */
390
391 if (blk_noretry_request(rq))
392 do_end_request = 1;
393
394 if (sense_key == NOT_READY) {
395 /* tray open */
396 if (rq_data_dir(rq) == READ) {
397 cdrom_saw_media_change(drive);
398
399 /* fail the request */
400 printk(KERN_ERR PFX "%s: tray open\n",
401 drive->name);
402 do_end_request = 1;
403 } else {
404 struct cdrom_info *info = drive->driver_data;
405
406 /*
407 * Allow the drive 5 seconds to recover, some
408 * devices will return this error while flushing
409 * data from cache.
410 */
411 if (!rq->errors)
412 info->write_timeout = jiffies +
413 ATAPI_WAIT_WRITE_BUSY;
414 rq->errors = 1;
415 if (time_after(jiffies, info->write_timeout))
416 do_end_request = 1;
417 else {
418 struct request_queue *q = drive->queue;
419 unsigned long flags;
420
421 /*
422 * take a breather relying on the unplug
423 * timer to kick us again
424 */
425 spin_lock_irqsave(q->queue_lock, flags);
426 blk_plug_device(q);
427 spin_unlock_irqrestore(q->queue_lock, flags);
428
429 return 1;
430 }
431 }
432 } else if (sense_key == UNIT_ATTENTION) {
433 /* media change */
434 cdrom_saw_media_change(drive);
435
436 /*
437 * Arrange to retry the request but be sure to give up
438 * if we've retried too many times.
439 */
440 if (++rq->errors > ERROR_MAX)
441 do_end_request = 1;
442 } else if (sense_key == ILLEGAL_REQUEST ||
443 sense_key == DATA_PROTECT) {
444 /*
445 * No point in retrying after an illegal request or data
446 * protect error.
447 */
448 ide_dump_status_no_sense(drive, "command error", stat);
449 do_end_request = 1;
450 } else if (sense_key == MEDIUM_ERROR) {
451 /*
452 * No point in re-trying a zillion times on a bad
453 * sector. If we got here the error is not correctable.
454 */
455 ide_dump_status_no_sense(drive,
456 "media error (bad sector)",
457 stat);
458 do_end_request = 1;
459 } else if (sense_key == BLANK_CHECK) {
460 /* disk appears blank ?? */
461 ide_dump_status_no_sense(drive, "media error (blank)",
462 stat);
463 do_end_request = 1;
464 } else if ((err & ~ATA_ABORTED) != 0) {
465 /* go to the default handler for other errors */
466 ide_error(drive, "cdrom_decode_status", stat);
467 return 1;
468 } else if ((++rq->errors > ERROR_MAX)) {
469 /* we've racked up too many retries, abort */
470 do_end_request = 1;
471 }
472
473 /*
474 * End a request through request sense analysis when we have
475 * sense data. We need this in order to perform end of media
476 * processing.
477 */
478 if (do_end_request)
479 goto end_request;
480
481 /*
482 * If we got a CHECK_CONDITION status, queue
483 * a request sense command.
484 */
485 if (stat & ATA_ERR)
486 cdrom_queue_request_sense(drive, NULL, NULL);
487 } else {
488 blk_dump_rq_flags(rq, PFX "bad rq");
489 cdrom_end_request(drive, 0);
490 }
491
492 /* retry, or handle the next request */
493 return 1;
494
495 end_request:
496 if (stat & ATA_ERR) {
497 struct request_queue *q = drive->queue;
498 unsigned long flags;
499
500 spin_lock_irqsave(q->queue_lock, flags);
501 blkdev_dequeue_request(rq);
502 spin_unlock_irqrestore(q->queue_lock, flags);
503
504 hwif->rq = NULL;
505
506 cdrom_queue_request_sense(drive, rq->sense, rq);
507 } else
508 cdrom_end_request(drive, 0);
509
510 return 1;
511 }
512
513 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
514 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
515
516 /*
517 * Set up the device registers for transferring a packet command on DEV,
518 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
519 * which actually transfers the command to the drive. If this is a
520 * drq_interrupt device, this routine will arrange for HANDLER to be
521 * called when the interrupt from the drive arrives. Otherwise, HANDLER
522 * will be called immediately after the drive is prepared for the transfer.
523 */
524 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
525 {
526 ide_hwif_t *hwif = drive->hwif;
527 struct request *rq = hwif->rq;
528 int xferlen;
529
530 xferlen = ide_cd_get_xferlen(rq);
531
532 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
533
534 /* FIXME: for Virtual DMA we must check harder */
535 if (drive->dma)
536 drive->dma = !hwif->dma_ops->dma_setup(drive);
537
538 /* set up the controller registers */
539 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
540 xferlen, drive->dma);
541
542 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
543 /* waiting for CDB interrupt, not DMA yet. */
544 if (drive->dma)
545 drive->waiting_for_dma = 0;
546
547 /* packet command */
548 ide_execute_command(drive, ATA_CMD_PACKET,
549 cdrom_transfer_packet_command,
550 ATAPI_WAIT_PC, ide_cd_expiry);
551 return ide_started;
552 } else {
553 ide_execute_pkt_cmd(drive);
554
555 return cdrom_transfer_packet_command(drive);
556 }
557 }
558
559 /*
560 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
561 * registers must have already been prepared by cdrom_start_packet_command.
562 * HANDLER is the interrupt handler to call when the command completes or
563 * there's data ready.
564 */
565 #define ATAPI_MIN_CDB_BYTES 12
566 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive)
567 {
568 ide_hwif_t *hwif = drive->hwif;
569 struct request *rq = hwif->rq;
570 int cmd_len;
571 ide_startstop_t startstop;
572
573 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
574
575 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
576 /*
577 * Here we should have been called after receiving an interrupt
578 * from the device. DRQ should how be set.
579 */
580
581 /* check for errors */
582 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
583 return ide_stopped;
584
585 /* ok, next interrupt will be DMA interrupt */
586 if (drive->dma)
587 drive->waiting_for_dma = 1;
588 } else {
589 /* otherwise, we must wait for DRQ to get set */
590 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
591 ATA_BUSY, WAIT_READY))
592 return startstop;
593 }
594
595 /* arm the interrupt handler */
596 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry);
597
598 /* ATAPI commands get padded out to 12 bytes minimum */
599 cmd_len = COMMAND_SIZE(rq->cmd[0]);
600 if (cmd_len < ATAPI_MIN_CDB_BYTES)
601 cmd_len = ATAPI_MIN_CDB_BYTES;
602
603 /* send the command to the device */
604 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
605
606 /* start the DMA if need be */
607 if (drive->dma)
608 hwif->dma_ops->dma_start(drive);
609
610 return ide_started;
611 }
612
613 /*
614 * Check the contents of the interrupt reason register from the cdrom
615 * and attempt to recover if there are problems. Returns 0 if everything's
616 * ok; nonzero if the request has been terminated.
617 */
618 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
619 int len, int ireason, int rw)
620 {
621 ide_hwif_t *hwif = drive->hwif;
622
623 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
624 __func__, ireason, rw);
625
626 /*
627 * ireason == 0: the drive wants to receive data from us
628 * ireason == 2: the drive is expecting to transfer data to us
629 */
630 if (ireason == (!rw << 1))
631 return 0;
632 else if (ireason == (rw << 1)) {
633
634 /* whoops... */
635 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
636 drive->name, __func__);
637
638 ide_pad_transfer(drive, rw, len);
639 } else if (rw == 0 && ireason == 1) {
640 /*
641 * Some drives (ASUS) seem to tell us that status info is
642 * available. Just get it and ignore.
643 */
644 (void)hwif->tp_ops->read_status(hwif);
645 return 0;
646 } else {
647 /* drive wants a command packet, or invalid ireason... */
648 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
649 drive->name, __func__, ireason);
650 }
651
652 if (rq->cmd_type == REQ_TYPE_ATA_PC)
653 rq->cmd_flags |= REQ_FAILED;
654
655 cdrom_end_request(drive, 0);
656 return -1;
657 }
658
659 /*
660 * Assume that the drive will always provide data in multiples of at least
661 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
662 */
663 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
664 {
665 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
666
667 if ((len % SECTOR_SIZE) == 0)
668 return 0;
669
670 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
671 __func__, len);
672
673 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
674 printk(KERN_ERR PFX "This drive is not supported by this "
675 "version of the driver\n");
676 else {
677 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
678 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
679 }
680
681 return 1;
682 }
683
684 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
685 struct request *rq)
686 {
687 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
688 rq->cmd_flags);
689
690 if (rq_data_dir(rq) == READ) {
691 unsigned short sectors_per_frame =
692 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
693 int nskip = rq->sector & (sectors_per_frame - 1);
694
695 /*
696 * If the requested sector doesn't start on a frame boundary,
697 * we must adjust the start of the transfer so that it does,
698 * and remember to skip the first few sectors.
699 *
700 * If the rq->current_nr_sectors field is larger than the size
701 * of the buffer, it will mean that we're to skip a number of
702 * sectors equal to the amount by which rq->current_nr_sectors
703 * is larger than the buffer size.
704 */
705 if (nskip > 0) {
706 /* sanity check... */
707 if (rq->current_nr_sectors !=
708 bio_cur_sectors(rq->bio)) {
709 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
710 drive->name, __func__,
711 rq->current_nr_sectors);
712 cdrom_end_request(drive, 0);
713 return ide_stopped;
714 }
715 rq->current_nr_sectors += nskip;
716 }
717 }
718
719 /* set up the command */
720 rq->timeout = ATAPI_WAIT_PC;
721
722 return ide_started;
723 }
724
725 /*
726 * Fix up a possibly partially-processed request so that we can start it over
727 * entirely, or even put it back on the request queue.
728 */
729 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
730 {
731
732 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
733
734 if (rq->buffer != bio_data(rq->bio)) {
735 sector_t n =
736 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
737
738 rq->buffer = bio_data(rq->bio);
739 rq->nr_sectors += n;
740 rq->sector -= n;
741 }
742 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
743 rq->hard_cur_sectors = rq->current_nr_sectors;
744 rq->hard_nr_sectors = rq->nr_sectors;
745 rq->hard_sector = rq->sector;
746 rq->q->prep_rq_fn(rq->q, rq);
747 }
748
749 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
750 {
751 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
752 __func__, rq->cmd[0]);
753
754 /*
755 * Some of the trailing request sense fields are optional,
756 * and some drives don't send them. Sigh.
757 */
758 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
759 rq->data_len > 0 && rq->data_len <= 5)
760 while (rq->data_len > 0) {
761 *(u8 *)rq->data++ = 0;
762 --rq->data_len;
763 }
764 }
765
766 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
767 int write, void *buffer, unsigned *bufflen,
768 struct request_sense *sense, int timeout,
769 unsigned int cmd_flags)
770 {
771 struct cdrom_info *info = drive->driver_data;
772 struct request_sense local_sense;
773 int retries = 10;
774 unsigned int flags = 0;
775
776 if (!sense)
777 sense = &local_sense;
778
779 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
780 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
781 timeout, cmd_flags);
782
783 /* start of retry loop */
784 do {
785 struct request *rq;
786 int error;
787
788 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
789
790 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
791 rq->cmd_type = REQ_TYPE_ATA_PC;
792 rq->sense = sense;
793 rq->cmd_flags |= cmd_flags;
794 rq->timeout = timeout;
795 if (buffer) {
796 rq->data = buffer;
797 rq->data_len = *bufflen;
798 }
799
800 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
801
802 if (buffer)
803 *bufflen = rq->data_len;
804
805 flags = rq->cmd_flags;
806 blk_put_request(rq);
807
808 /*
809 * FIXME: we should probably abort/retry or something in case of
810 * failure.
811 */
812 if (flags & REQ_FAILED) {
813 /*
814 * The request failed. Retry if it was due to a unit
815 * attention status (usually means media was changed).
816 */
817 struct request_sense *reqbuf = sense;
818
819 if (reqbuf->sense_key == UNIT_ATTENTION)
820 cdrom_saw_media_change(drive);
821 else if (reqbuf->sense_key == NOT_READY &&
822 reqbuf->asc == 4 && reqbuf->ascq != 4) {
823 /*
824 * The drive is in the process of loading
825 * a disk. Retry, but wait a little to give
826 * the drive time to complete the load.
827 */
828 ssleep(2);
829 } else {
830 /* otherwise, don't retry */
831 retries = 0;
832 }
833 --retries;
834 }
835
836 /* end of retry loop */
837 } while ((flags & REQ_FAILED) && retries >= 0);
838
839 /* return an error if the command failed */
840 return (flags & REQ_FAILED) ? -EIO : 0;
841 }
842
843 /*
844 * Called from blk_end_request_callback() after the data of the request is
845 * completed and before the request itself is completed. By returning value '1',
846 * blk_end_request_callback() returns immediately without completing it.
847 */
848 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
849 {
850 return 1;
851 }
852
853 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
854 {
855 ide_hwif_t *hwif = drive->hwif;
856 struct request *rq = hwif->rq;
857 xfer_func_t *xferfunc;
858 ide_expiry_t *expiry = NULL;
859 int dma_error = 0, dma, stat, thislen, uptodate = 0;
860 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
861 unsigned int timeout;
862 u16 len;
863 u8 ireason;
864
865 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
866 __func__, rq->cmd[0], write);
867
868 /* check for errors */
869 dma = drive->dma;
870 if (dma) {
871 drive->dma = 0;
872 dma_error = hwif->dma_ops->dma_end(drive);
873 if (dma_error) {
874 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
875 write ? "write" : "read");
876 ide_dma_off(drive);
877 }
878 }
879
880 if (cdrom_decode_status(drive, 0, &stat))
881 return ide_stopped;
882
883 /* using dma, transfer is complete now */
884 if (dma) {
885 if (dma_error)
886 return ide_error(drive, "dma error", stat);
887 if (blk_fs_request(rq)) {
888 ide_end_request(drive, 1, rq->nr_sectors);
889 return ide_stopped;
890 }
891 goto end_request;
892 }
893
894 ide_read_bcount_and_ireason(drive, &len, &ireason);
895
896 thislen = blk_fs_request(rq) ? len : rq->data_len;
897 if (thislen > len)
898 thislen = len;
899
900 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
901 __func__, stat, thislen);
902
903 /* If DRQ is clear, the command has completed. */
904 if ((stat & ATA_DRQ) == 0) {
905 if (blk_fs_request(rq)) {
906 /*
907 * If we're not done reading/writing, complain.
908 * Otherwise, complete the command normally.
909 */
910 uptodate = 1;
911 if (rq->current_nr_sectors > 0) {
912 printk(KERN_ERR PFX "%s: %s: data underrun "
913 "(%d blocks)\n",
914 drive->name, __func__,
915 rq->current_nr_sectors);
916 if (!write)
917 rq->cmd_flags |= REQ_FAILED;
918 uptodate = 0;
919 }
920 cdrom_end_request(drive, uptodate);
921 return ide_stopped;
922 } else if (!blk_pc_request(rq)) {
923 ide_cd_request_sense_fixup(drive, rq);
924 /* complain if we still have data left to transfer */
925 uptodate = rq->data_len ? 0 : 1;
926 }
927 goto end_request;
928 }
929
930 /* check which way to transfer data */
931 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
932 return ide_stopped;
933
934 if (blk_fs_request(rq)) {
935 if (write == 0) {
936 int nskip;
937
938 if (ide_cd_check_transfer_size(drive, len)) {
939 cdrom_end_request(drive, 0);
940 return ide_stopped;
941 }
942
943 /*
944 * First, figure out if we need to bit-bucket
945 * any of the leading sectors.
946 */
947 nskip = min_t(int, rq->current_nr_sectors
948 - bio_cur_sectors(rq->bio),
949 thislen >> 9);
950 if (nskip > 0) {
951 ide_pad_transfer(drive, write, nskip << 9);
952 rq->current_nr_sectors -= nskip;
953 thislen -= (nskip << 9);
954 }
955 }
956 }
957
958 if (ireason == 0) {
959 write = 1;
960 xferfunc = hwif->tp_ops->output_data;
961 } else {
962 write = 0;
963 xferfunc = hwif->tp_ops->input_data;
964 }
965
966 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
967 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
968
969 /* transfer data */
970 while (thislen > 0) {
971 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
972 int blen = rq->data_len;
973
974 /* bio backed? */
975 if (rq->bio) {
976 if (blk_fs_request(rq)) {
977 ptr = rq->buffer;
978 blen = rq->current_nr_sectors << 9;
979 } else {
980 ptr = bio_data(rq->bio);
981 blen = bio_iovec(rq->bio)->bv_len;
982 }
983 }
984
985 if (!ptr) {
986 if (blk_fs_request(rq) && !write)
987 /*
988 * If the buffers are full, pipe the rest into
989 * oblivion.
990 */
991 ide_pad_transfer(drive, 0, thislen);
992 else {
993 printk(KERN_ERR PFX "%s: confused, missing data\n",
994 drive->name);
995 blk_dump_rq_flags(rq, rq_data_dir(rq)
996 ? "cdrom_newpc_intr, write"
997 : "cdrom_newpc_intr, read");
998 }
999 break;
1000 }
1001
1002 if (blen > thislen)
1003 blen = thislen;
1004
1005 xferfunc(drive, NULL, ptr, blen);
1006
1007 thislen -= blen;
1008 len -= blen;
1009
1010 if (blk_fs_request(rq)) {
1011 rq->buffer += blen;
1012 rq->nr_sectors -= (blen >> 9);
1013 rq->current_nr_sectors -= (blen >> 9);
1014 rq->sector += (blen >> 9);
1015
1016 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1017 cdrom_end_request(drive, 1);
1018 } else {
1019 rq->data_len -= blen;
1020
1021 /*
1022 * The request can't be completed until DRQ is cleared.
1023 * So complete the data, but don't complete the request
1024 * using the dummy function for the callback feature
1025 * of blk_end_request_callback().
1026 */
1027 if (rq->bio)
1028 blk_end_request_callback(rq, 0, blen,
1029 cdrom_newpc_intr_dummy_cb);
1030 else
1031 rq->data += blen;
1032 }
1033 if (!write && blk_sense_request(rq))
1034 rq->sense_len += blen;
1035 }
1036
1037 /* pad, if necessary */
1038 if (!blk_fs_request(rq) && len > 0)
1039 ide_pad_transfer(drive, write, len);
1040
1041 if (blk_pc_request(rq)) {
1042 timeout = rq->timeout;
1043 } else {
1044 timeout = ATAPI_WAIT_PC;
1045 if (!blk_fs_request(rq))
1046 expiry = ide_cd_expiry;
1047 }
1048
1049 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1050 return ide_started;
1051
1052 end_request:
1053 if (blk_pc_request(rq)) {
1054 unsigned int dlen = rq->data_len;
1055
1056 if (dma)
1057 rq->data_len = 0;
1058
1059 if (blk_end_request(rq, 0, dlen))
1060 BUG();
1061
1062 hwif->rq = NULL;
1063 } else {
1064 if (!uptodate)
1065 rq->cmd_flags |= REQ_FAILED;
1066 cdrom_end_request(drive, uptodate);
1067 }
1068 return ide_stopped;
1069 }
1070
1071 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1072 {
1073 struct cdrom_info *cd = drive->driver_data;
1074 int write = rq_data_dir(rq) == WRITE;
1075 unsigned short sectors_per_frame =
1076 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1077
1078 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1079 "secs_per_frame: %u\n",
1080 __func__, rq->cmd[0], write, sectors_per_frame);
1081
1082 if (write) {
1083 /* disk has become write protected */
1084 if (get_disk_ro(cd->disk)) {
1085 cdrom_end_request(drive, 0);
1086 return ide_stopped;
1087 }
1088 } else {
1089 /*
1090 * We may be retrying this request after an error. Fix up any
1091 * weirdness which might be present in the request packet.
1092 */
1093 ide_cd_restore_request(drive, rq);
1094 }
1095
1096 /* use DMA, if possible / writes *must* be hardware frame aligned */
1097 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1098 (rq->sector & (sectors_per_frame - 1))) {
1099 if (write) {
1100 cdrom_end_request(drive, 0);
1101 return ide_stopped;
1102 }
1103 drive->dma = 0;
1104 } else
1105 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1106
1107 if (write)
1108 cd->devinfo.media_written = 1;
1109
1110 return ide_started;
1111 }
1112
1113 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1114 {
1115
1116 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1117 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1118 rq->cmd_type);
1119
1120 if (blk_pc_request(rq))
1121 rq->cmd_flags |= REQ_QUIET;
1122 else
1123 rq->cmd_flags &= ~REQ_FAILED;
1124
1125 drive->dma = 0;
1126
1127 /* sg request */
1128 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1129 struct request_queue *q = drive->queue;
1130 unsigned int alignment;
1131 char *buf;
1132
1133 if (rq->bio)
1134 buf = bio_data(rq->bio);
1135 else
1136 buf = rq->data;
1137
1138 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1139
1140 /*
1141 * check if dma is safe
1142 *
1143 * NOTE! The "len" and "addr" checks should possibly have
1144 * separate masks.
1145 */
1146 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1147 if ((unsigned long)buf & alignment
1148 || rq->data_len & q->dma_pad_mask
1149 || object_is_on_stack(buf))
1150 drive->dma = 0;
1151 }
1152 }
1153
1154 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1155 sector_t block)
1156 {
1157 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1158 "rq->cmd_type: 0x%x, block: %llu\n",
1159 __func__, rq->cmd[0], rq->cmd_type,
1160 (unsigned long long)block);
1161
1162 if (blk_fs_request(rq)) {
1163 if (cdrom_start_rw(drive, rq) == ide_stopped)
1164 return ide_stopped;
1165
1166 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1167 return ide_stopped;
1168 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1169 rq->cmd_type == REQ_TYPE_ATA_PC) {
1170 if (!rq->timeout)
1171 rq->timeout = ATAPI_WAIT_PC;
1172
1173 cdrom_do_block_pc(drive, rq);
1174 } else if (blk_special_request(rq)) {
1175 /* right now this can only be a reset... */
1176 cdrom_end_request(drive, 1);
1177 return ide_stopped;
1178 } else {
1179 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1180 cdrom_end_request(drive, 0);
1181 return ide_stopped;
1182 }
1183
1184 return cdrom_start_packet_command(drive);
1185 }
1186
1187 /*
1188 * Ioctl handling.
1189 *
1190 * Routines which queue packet commands take as a final argument a pointer to a
1191 * request_sense struct. If execution of the command results in an error with a
1192 * CHECK CONDITION status, this structure will be filled with the results of the
1193 * subsequent request sense command. The pointer can also be NULL, in which case
1194 * no sense information is returned.
1195 */
1196 static void msf_from_bcd(struct atapi_msf *msf)
1197 {
1198 msf->minute = bcd2bin(msf->minute);
1199 msf->second = bcd2bin(msf->second);
1200 msf->frame = bcd2bin(msf->frame);
1201 }
1202
1203 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1204 {
1205 struct cdrom_info *info = drive->driver_data;
1206 struct cdrom_device_info *cdi = &info->devinfo;
1207 unsigned char cmd[BLK_MAX_CDB];
1208
1209 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1210
1211 memset(cmd, 0, BLK_MAX_CDB);
1212 cmd[0] = GPCMD_TEST_UNIT_READY;
1213
1214 /*
1215 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1216 * instead of supporting the LOAD_UNLOAD opcode.
1217 */
1218 cmd[7] = cdi->sanyo_slot % 3;
1219
1220 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1221 }
1222
1223 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1224 unsigned long *sectors_per_frame,
1225 struct request_sense *sense)
1226 {
1227 struct {
1228 __be32 lba;
1229 __be32 blocklen;
1230 } capbuf;
1231
1232 int stat;
1233 unsigned char cmd[BLK_MAX_CDB];
1234 unsigned len = sizeof(capbuf);
1235 u32 blocklen;
1236
1237 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1238
1239 memset(cmd, 0, BLK_MAX_CDB);
1240 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1241
1242 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1243 REQ_QUIET);
1244 if (stat)
1245 return stat;
1246
1247 /*
1248 * Sanity check the given block size
1249 */
1250 blocklen = be32_to_cpu(capbuf.blocklen);
1251 switch (blocklen) {
1252 case 512:
1253 case 1024:
1254 case 2048:
1255 case 4096:
1256 break;
1257 default:
1258 printk(KERN_ERR PFX "%s: weird block size %u\n",
1259 drive->name, blocklen);
1260 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1261 drive->name);
1262 blocklen = 2048;
1263 break;
1264 }
1265
1266 *capacity = 1 + be32_to_cpu(capbuf.lba);
1267 *sectors_per_frame = blocklen >> SECTOR_BITS;
1268
1269 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1270 __func__, *capacity, *sectors_per_frame);
1271
1272 return 0;
1273 }
1274
1275 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1276 int format, char *buf, int buflen,
1277 struct request_sense *sense)
1278 {
1279 unsigned char cmd[BLK_MAX_CDB];
1280
1281 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1282
1283 memset(cmd, 0, BLK_MAX_CDB);
1284
1285 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1286 cmd[6] = trackno;
1287 cmd[7] = (buflen >> 8);
1288 cmd[8] = (buflen & 0xff);
1289 cmd[9] = (format << 6);
1290
1291 if (msf_flag)
1292 cmd[1] = 2;
1293
1294 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1295 }
1296
1297 /* Try to read the entire TOC for the disk into our internal buffer. */
1298 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1299 {
1300 int stat, ntracks, i;
1301 struct cdrom_info *info = drive->driver_data;
1302 struct cdrom_device_info *cdi = &info->devinfo;
1303 struct atapi_toc *toc = info->toc;
1304 struct {
1305 struct atapi_toc_header hdr;
1306 struct atapi_toc_entry ent;
1307 } ms_tmp;
1308 long last_written;
1309 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1310
1311 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1312
1313 if (toc == NULL) {
1314 /* try to allocate space */
1315 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1316 if (toc == NULL) {
1317 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1318 drive->name);
1319 return -ENOMEM;
1320 }
1321 info->toc = toc;
1322 }
1323
1324 /*
1325 * Check to see if the existing data is still valid. If it is,
1326 * just return.
1327 */
1328 (void) cdrom_check_status(drive, sense);
1329
1330 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1331 return 0;
1332
1333 /* try to get the total cdrom capacity and sector size */
1334 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1335 sense);
1336 if (stat)
1337 toc->capacity = 0x1fffff;
1338
1339 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1340 /* save a private copy of the TOC capacity for error handling */
1341 drive->probed_capacity = toc->capacity * sectors_per_frame;
1342
1343 blk_queue_hardsect_size(drive->queue,
1344 sectors_per_frame << SECTOR_BITS);
1345
1346 /* first read just the header, so we know how long the TOC is */
1347 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1348 sizeof(struct atapi_toc_header), sense);
1349 if (stat)
1350 return stat;
1351
1352 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1353 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1354 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1355 }
1356
1357 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1358 if (ntracks <= 0)
1359 return -EIO;
1360 if (ntracks > MAX_TRACKS)
1361 ntracks = MAX_TRACKS;
1362
1363 /* now read the whole schmeer */
1364 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1365 (char *)&toc->hdr,
1366 sizeof(struct atapi_toc_header) +
1367 (ntracks + 1) *
1368 sizeof(struct atapi_toc_entry), sense);
1369
1370 if (stat && toc->hdr.first_track > 1) {
1371 /*
1372 * Cds with CDI tracks only don't have any TOC entries, despite
1373 * of this the returned values are
1374 * first_track == last_track = number of CDI tracks + 1,
1375 * so that this case is indistinguishable from the same layout
1376 * plus an additional audio track. If we get an error for the
1377 * regular case, we assume a CDI without additional audio
1378 * tracks. In this case the readable TOC is empty (CDI tracks
1379 * are not included) and only holds the Leadout entry.
1380 *
1381 * Heiko Eißfeldt.
1382 */
1383 ntracks = 0;
1384 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1385 (char *)&toc->hdr,
1386 sizeof(struct atapi_toc_header) +
1387 (ntracks + 1) *
1388 sizeof(struct atapi_toc_entry),
1389 sense);
1390 if (stat)
1391 return stat;
1392
1393 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1394 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1395 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1396 } else {
1397 toc->hdr.first_track = CDROM_LEADOUT;
1398 toc->hdr.last_track = CDROM_LEADOUT;
1399 }
1400 }
1401
1402 if (stat)
1403 return stat;
1404
1405 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1406
1407 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1408 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1409 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1410 }
1411
1412 for (i = 0; i <= ntracks; i++) {
1413 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1414 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1415 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1416 msf_from_bcd(&toc->ent[i].addr.msf);
1417 }
1418 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1419 toc->ent[i].addr.msf.second,
1420 toc->ent[i].addr.msf.frame);
1421 }
1422
1423 if (toc->hdr.first_track != CDROM_LEADOUT) {
1424 /* read the multisession information */
1425 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1426 sizeof(ms_tmp), sense);
1427 if (stat)
1428 return stat;
1429
1430 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1431 } else {
1432 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1433 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1434 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1435 }
1436
1437 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1438 /* re-read multisession information using MSF format */
1439 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1440 sizeof(ms_tmp), sense);
1441 if (stat)
1442 return stat;
1443
1444 msf_from_bcd(&ms_tmp.ent.addr.msf);
1445 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1446 ms_tmp.ent.addr.msf.second,
1447 ms_tmp.ent.addr.msf.frame);
1448 }
1449
1450 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1451
1452 /* now try to get the total cdrom capacity */
1453 stat = cdrom_get_last_written(cdi, &last_written);
1454 if (!stat && (last_written > toc->capacity)) {
1455 toc->capacity = last_written;
1456 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1457 drive->probed_capacity = toc->capacity * sectors_per_frame;
1458 }
1459
1460 /* Remember that we've read this stuff. */
1461 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1462
1463 return 0;
1464 }
1465
1466 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1467 {
1468 struct cdrom_info *info = drive->driver_data;
1469 struct cdrom_device_info *cdi = &info->devinfo;
1470 struct packet_command cgc;
1471 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1472
1473 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1474
1475 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1476 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1477
1478 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1479 do {
1480 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1481 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1482 if (!stat)
1483 break;
1484 } while (--attempts);
1485 return stat;
1486 }
1487
1488 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1489 {
1490 struct cdrom_info *cd = drive->driver_data;
1491 u16 curspeed, maxspeed;
1492
1493 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1494
1495 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1496 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1497 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1498 } else {
1499 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1500 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1501 }
1502
1503 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1504 __func__, curspeed, maxspeed);
1505
1506 cd->current_speed = (curspeed + (176/2)) / 176;
1507 cd->max_speed = (maxspeed + (176/2)) / 176;
1508 }
1509
1510 #define IDE_CD_CAPABILITIES \
1511 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1512 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1513 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1514 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1515 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1516
1517 static struct cdrom_device_ops ide_cdrom_dops = {
1518 .open = ide_cdrom_open_real,
1519 .release = ide_cdrom_release_real,
1520 .drive_status = ide_cdrom_drive_status,
1521 .media_changed = ide_cdrom_check_media_change_real,
1522 .tray_move = ide_cdrom_tray_move,
1523 .lock_door = ide_cdrom_lock_door,
1524 .select_speed = ide_cdrom_select_speed,
1525 .get_last_session = ide_cdrom_get_last_session,
1526 .get_mcn = ide_cdrom_get_mcn,
1527 .reset = ide_cdrom_reset,
1528 .audio_ioctl = ide_cdrom_audio_ioctl,
1529 .capability = IDE_CD_CAPABILITIES,
1530 .generic_packet = ide_cdrom_packet,
1531 };
1532
1533 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1534 {
1535 struct cdrom_info *info = drive->driver_data;
1536 struct cdrom_device_info *devinfo = &info->devinfo;
1537
1538 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1539
1540 devinfo->ops = &ide_cdrom_dops;
1541 devinfo->speed = info->current_speed;
1542 devinfo->capacity = nslots;
1543 devinfo->handle = drive;
1544 strcpy(devinfo->name, drive->name);
1545
1546 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1547 devinfo->mask |= CDC_SELECT_SPEED;
1548
1549 devinfo->disk = info->disk;
1550 return register_cdrom(devinfo);
1551 }
1552
1553 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1554 {
1555 struct cdrom_info *cd = drive->driver_data;
1556 struct cdrom_device_info *cdi = &cd->devinfo;
1557 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1558 mechtype_t mechtype;
1559 int nslots = 1;
1560
1561 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1562 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1563 drive->atapi_flags);
1564
1565 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1566 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1567 CDC_MO_DRIVE | CDC_RAM);
1568
1569 if (drive->media == ide_optical) {
1570 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1571 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1572 drive->name);
1573 return nslots;
1574 }
1575
1576 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1577 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1578 cdi->mask &= ~CDC_PLAY_AUDIO;
1579 return nslots;
1580 }
1581
1582 /*
1583 * We have to cheat a little here. the packet will eventually be queued
1584 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1585 * Since this device hasn't been registered with the Uniform layer yet,
1586 * it can't do this. Same goes for cdi->ops.
1587 */
1588 cdi->handle = drive;
1589 cdi->ops = &ide_cdrom_dops;
1590
1591 if (ide_cdrom_get_capabilities(drive, buf))
1592 return 0;
1593
1594 if ((buf[8 + 6] & 0x01) == 0)
1595 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1596 if (buf[8 + 6] & 0x08)
1597 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1598 if (buf[8 + 3] & 0x01)
1599 cdi->mask &= ~CDC_CD_R;
1600 if (buf[8 + 3] & 0x02)
1601 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1602 if (buf[8 + 2] & 0x38)
1603 cdi->mask &= ~CDC_DVD;
1604 if (buf[8 + 3] & 0x20)
1605 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1606 if (buf[8 + 3] & 0x10)
1607 cdi->mask &= ~CDC_DVD_R;
1608 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1609 cdi->mask &= ~CDC_PLAY_AUDIO;
1610
1611 mechtype = buf[8 + 6] >> 5;
1612 if (mechtype == mechtype_caddy ||
1613 mechtype == mechtype_popup ||
1614 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1615 cdi->mask |= CDC_CLOSE_TRAY;
1616
1617 if (cdi->sanyo_slot > 0) {
1618 cdi->mask &= ~CDC_SELECT_DISC;
1619 nslots = 3;
1620 } else if (mechtype == mechtype_individual_changer ||
1621 mechtype == mechtype_cartridge_changer) {
1622 nslots = cdrom_number_of_slots(cdi);
1623 if (nslots > 1)
1624 cdi->mask &= ~CDC_SELECT_DISC;
1625 }
1626
1627 ide_cdrom_update_speed(drive, buf);
1628
1629 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1630
1631 /* don't print speed if the drive reported 0 */
1632 if (cd->max_speed)
1633 printk(KERN_CONT " %dX", cd->max_speed);
1634
1635 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1636
1637 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1638 printk(KERN_CONT " DVD%s%s",
1639 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1640 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1641
1642 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1643 printk(KERN_CONT " CD%s%s",
1644 (cdi->mask & CDC_CD_R) ? "" : "-R",
1645 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1646
1647 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1648 printk(KERN_CONT " changer w/%d slots", nslots);
1649 else
1650 printk(KERN_CONT " drive");
1651
1652 printk(KERN_CONT ", %dkB Cache\n",
1653 be16_to_cpup((__be16 *)&buf[8 + 12]));
1654
1655 return nslots;
1656 }
1657
1658 /* standard prep_rq_fn that builds 10 byte cmds */
1659 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1660 {
1661 int hard_sect = queue_hardsect_size(q);
1662 long block = (long)rq->hard_sector / (hard_sect >> 9);
1663 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1664
1665 memset(rq->cmd, 0, BLK_MAX_CDB);
1666
1667 if (rq_data_dir(rq) == READ)
1668 rq->cmd[0] = GPCMD_READ_10;
1669 else
1670 rq->cmd[0] = GPCMD_WRITE_10;
1671
1672 /*
1673 * fill in lba
1674 */
1675 rq->cmd[2] = (block >> 24) & 0xff;
1676 rq->cmd[3] = (block >> 16) & 0xff;
1677 rq->cmd[4] = (block >> 8) & 0xff;
1678 rq->cmd[5] = block & 0xff;
1679
1680 /*
1681 * and transfer length
1682 */
1683 rq->cmd[7] = (blocks >> 8) & 0xff;
1684 rq->cmd[8] = blocks & 0xff;
1685 rq->cmd_len = 10;
1686 return BLKPREP_OK;
1687 }
1688
1689 /*
1690 * Most of the SCSI commands are supported directly by ATAPI devices.
1691 * This transform handles the few exceptions.
1692 */
1693 static int ide_cdrom_prep_pc(struct request *rq)
1694 {
1695 u8 *c = rq->cmd;
1696
1697 /* transform 6-byte read/write commands to the 10-byte version */
1698 if (c[0] == READ_6 || c[0] == WRITE_6) {
1699 c[8] = c[4];
1700 c[5] = c[3];
1701 c[4] = c[2];
1702 c[3] = c[1] & 0x1f;
1703 c[2] = 0;
1704 c[1] &= 0xe0;
1705 c[0] += (READ_10 - READ_6);
1706 rq->cmd_len = 10;
1707 return BLKPREP_OK;
1708 }
1709
1710 /*
1711 * it's silly to pretend we understand 6-byte sense commands, just
1712 * reject with ILLEGAL_REQUEST and the caller should take the
1713 * appropriate action
1714 */
1715 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1716 rq->errors = ILLEGAL_REQUEST;
1717 return BLKPREP_KILL;
1718 }
1719
1720 return BLKPREP_OK;
1721 }
1722
1723 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1724 {
1725 if (blk_fs_request(rq))
1726 return ide_cdrom_prep_fs(q, rq);
1727 else if (blk_pc_request(rq))
1728 return ide_cdrom_prep_pc(rq);
1729
1730 return 0;
1731 }
1732
1733 struct cd_list_entry {
1734 const char *id_model;
1735 const char *id_firmware;
1736 unsigned int cd_flags;
1737 };
1738
1739 #ifdef CONFIG_IDE_PROC_FS
1740 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1741 {
1742 unsigned long capacity, sectors_per_frame;
1743
1744 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1745 return 0;
1746
1747 return capacity * sectors_per_frame;
1748 }
1749
1750 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1751 int count, int *eof, void *data)
1752 {
1753 ide_drive_t *drive = data;
1754 int len;
1755
1756 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1757 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1758 }
1759
1760 static ide_proc_entry_t idecd_proc[] = {
1761 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1762 { NULL, 0, NULL, NULL }
1763 };
1764
1765 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1766 {
1767 return idecd_proc;
1768 }
1769
1770 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1771 {
1772 return NULL;
1773 }
1774 #endif
1775
1776 static const struct cd_list_entry ide_cd_quirks_list[] = {
1777 /* Limit transfer size per interrupt. */
1778 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1779 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1780 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1781 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1782 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1783 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1784 IDE_AFLAG_PRE_ATAPI12, },
1785 /* Vertos 300, some versions of this drive like to talk BCD. */
1786 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1787 /* Vertos 600 ESD. */
1788 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1789 /*
1790 * Sanyo 3 CD changer uses a non-standard command for CD changing
1791 * (by default standard ATAPI support for CD changers is used).
1792 */
1793 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1794 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1795 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1796 /* Stingray 8X CD-ROM. */
1797 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1798 /*
1799 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1800 * mode sense page capabilities size, but older drives break.
1801 */
1802 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1803 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1804 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1805 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1806 /*
1807 * Some drives used by Apple don't advertise audio play
1808 * but they do support reading TOC & audio datas.
1809 */
1810 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1811 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1812 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1813 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1814 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1815 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1816 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1817 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1818 { NULL, NULL, 0 }
1819 };
1820
1821 static unsigned int ide_cd_flags(u16 *id)
1822 {
1823 const struct cd_list_entry *cle = ide_cd_quirks_list;
1824
1825 while (cle->id_model) {
1826 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1827 (cle->id_firmware == NULL ||
1828 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1829 return cle->cd_flags;
1830 cle++;
1831 }
1832
1833 return 0;
1834 }
1835
1836 static int ide_cdrom_setup(ide_drive_t *drive)
1837 {
1838 struct cdrom_info *cd = drive->driver_data;
1839 struct cdrom_device_info *cdi = &cd->devinfo;
1840 u16 *id = drive->id;
1841 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1842 int nslots;
1843
1844 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1845
1846 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1847 blk_queue_dma_alignment(drive->queue, 31);
1848 blk_queue_update_dma_pad(drive->queue, 15);
1849 drive->queue->unplug_delay = (1 * HZ) / 1000;
1850 if (!drive->queue->unplug_delay)
1851 drive->queue->unplug_delay = 1;
1852
1853 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1854 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1855
1856 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1857 fw_rev[4] == '1' && fw_rev[6] <= '2')
1858 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1859 IDE_AFLAG_TOCADDR_AS_BCD);
1860 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1861 fw_rev[4] == '1' && fw_rev[6] <= '2')
1862 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1863 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1864 /* 3 => use CD in slot 0 */
1865 cdi->sanyo_slot = 3;
1866
1867 nslots = ide_cdrom_probe_capabilities(drive);
1868
1869 /* set correct block size */
1870 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1871
1872 if (ide_cdrom_register(drive, nslots)) {
1873 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1874 " cdrom driver.\n", drive->name, __func__);
1875 cd->devinfo.handle = NULL;
1876 return 1;
1877 }
1878
1879 ide_proc_register_driver(drive, cd->driver);
1880 return 0;
1881 }
1882
1883 static void ide_cd_remove(ide_drive_t *drive)
1884 {
1885 struct cdrom_info *info = drive->driver_data;
1886
1887 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1888
1889 ide_proc_unregister_driver(drive, info->driver);
1890
1891 del_gendisk(info->disk);
1892
1893 ide_cd_put(info);
1894 }
1895
1896 static void ide_cd_release(struct kref *kref)
1897 {
1898 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1899 struct cdrom_device_info *devinfo = &info->devinfo;
1900 ide_drive_t *drive = info->drive;
1901 struct gendisk *g = info->disk;
1902
1903 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1904
1905 kfree(info->toc);
1906 if (devinfo->handle == drive)
1907 unregister_cdrom(devinfo);
1908 drive->driver_data = NULL;
1909 blk_queue_prep_rq(drive->queue, NULL);
1910 g->private_data = NULL;
1911 put_disk(g);
1912 kfree(info);
1913 }
1914
1915 static int ide_cd_probe(ide_drive_t *);
1916
1917 static struct ide_driver ide_cdrom_driver = {
1918 .gen_driver = {
1919 .owner = THIS_MODULE,
1920 .name = "ide-cdrom",
1921 .bus = &ide_bus_type,
1922 },
1923 .probe = ide_cd_probe,
1924 .remove = ide_cd_remove,
1925 .version = IDECD_VERSION,
1926 .do_request = ide_cd_do_request,
1927 .end_request = ide_end_request,
1928 .error = __ide_error,
1929 #ifdef CONFIG_IDE_PROC_FS
1930 .proc_entries = ide_cd_proc_entries,
1931 .proc_devsets = ide_cd_proc_devsets,
1932 #endif
1933 };
1934
1935 static int idecd_open(struct block_device *bdev, fmode_t mode)
1936 {
1937 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1938 int rc = -ENOMEM;
1939
1940 if (!info)
1941 return -ENXIO;
1942
1943 rc = cdrom_open(&info->devinfo, bdev, mode);
1944
1945 if (rc < 0)
1946 ide_cd_put(info);
1947
1948 return rc;
1949 }
1950
1951 static int idecd_release(struct gendisk *disk, fmode_t mode)
1952 {
1953 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1954
1955 cdrom_release(&info->devinfo, mode);
1956
1957 ide_cd_put(info);
1958
1959 return 0;
1960 }
1961
1962 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1963 {
1964 struct packet_command cgc;
1965 char buffer[16];
1966 int stat;
1967 char spindown;
1968
1969 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1970 return -EFAULT;
1971
1972 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1973
1974 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1975 if (stat)
1976 return stat;
1977
1978 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1979 return cdrom_mode_select(cdi, &cgc);
1980 }
1981
1982 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1983 {
1984 struct packet_command cgc;
1985 char buffer[16];
1986 int stat;
1987 char spindown;
1988
1989 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1990
1991 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1992 if (stat)
1993 return stat;
1994
1995 spindown = buffer[11] & 0x0f;
1996 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1997 return -EFAULT;
1998 return 0;
1999 }
2000
2001 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2002 unsigned int cmd, unsigned long arg)
2003 {
2004 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2005 int err;
2006
2007 switch (cmd) {
2008 case CDROMSETSPINDOWN:
2009 return idecd_set_spindown(&info->devinfo, arg);
2010 case CDROMGETSPINDOWN:
2011 return idecd_get_spindown(&info->devinfo, arg);
2012 default:
2013 break;
2014 }
2015
2016 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2017 if (err == -EINVAL)
2018 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2019
2020 return err;
2021 }
2022
2023 static int idecd_media_changed(struct gendisk *disk)
2024 {
2025 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2026 return cdrom_media_changed(&info->devinfo);
2027 }
2028
2029 static int idecd_revalidate_disk(struct gendisk *disk)
2030 {
2031 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2032 struct request_sense sense;
2033
2034 ide_cd_read_toc(info->drive, &sense);
2035
2036 return 0;
2037 }
2038
2039 static struct block_device_operations idecd_ops = {
2040 .owner = THIS_MODULE,
2041 .open = idecd_open,
2042 .release = idecd_release,
2043 .locked_ioctl = idecd_ioctl,
2044 .media_changed = idecd_media_changed,
2045 .revalidate_disk = idecd_revalidate_disk
2046 };
2047
2048 /* module options */
2049 static char *ignore;
2050 module_param(ignore, charp, 0400);
2051
2052 static unsigned long debug_mask;
2053 module_param(debug_mask, ulong, 0644);
2054
2055 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2056
2057 static int ide_cd_probe(ide_drive_t *drive)
2058 {
2059 struct cdrom_info *info;
2060 struct gendisk *g;
2061 struct request_sense sense;
2062
2063 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2064 "drive->media: 0x%x\n", __func__, drive->driver_req,
2065 drive->media);
2066
2067 if (!strstr("ide-cdrom", drive->driver_req))
2068 goto failed;
2069
2070 if (drive->media != ide_cdrom && drive->media != ide_optical)
2071 goto failed;
2072
2073 /* skip drives that we were told to ignore */
2074 if (ignore != NULL) {
2075 if (strstr(ignore, drive->name)) {
2076 printk(KERN_INFO PFX "ignoring drive %s\n",
2077 drive->name);
2078 goto failed;
2079 }
2080 }
2081
2082 drive->debug_mask = debug_mask;
2083
2084 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2085 if (info == NULL) {
2086 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2087 drive->name);
2088 goto failed;
2089 }
2090
2091 g = alloc_disk(1 << PARTN_BITS);
2092 if (!g)
2093 goto out_free_cd;
2094
2095 ide_init_disk(g, drive);
2096
2097 kref_init(&info->kref);
2098
2099 info->drive = drive;
2100 info->driver = &ide_cdrom_driver;
2101 info->disk = g;
2102
2103 g->private_data = &info->driver;
2104
2105 drive->driver_data = info;
2106
2107 g->minors = 1;
2108 g->driverfs_dev = &drive->gendev;
2109 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2110 if (ide_cdrom_setup(drive)) {
2111 ide_cd_release(&info->kref);
2112 goto failed;
2113 }
2114
2115 ide_cd_read_toc(drive, &sense);
2116 g->fops = &idecd_ops;
2117 g->flags |= GENHD_FL_REMOVABLE;
2118 add_disk(g);
2119 return 0;
2120
2121 out_free_cd:
2122 kfree(info);
2123 failed:
2124 return -ENODEV;
2125 }
2126
2127 static void __exit ide_cdrom_exit(void)
2128 {
2129 driver_unregister(&ide_cdrom_driver.gen_driver);
2130 }
2131
2132 static int __init ide_cdrom_init(void)
2133 {
2134 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2135 return driver_register(&ide_cdrom_driver.gen_driver);
2136 }
2137
2138 MODULE_ALIAS("ide:*m-cdrom*");
2139 MODULE_ALIAS("ide-cd");
2140 module_init(ide_cdrom_init);
2141 module_exit(ide_cdrom_exit);
2142 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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