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ide: ide_hwgroup_t.rq doesn't need an ide_lock held
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 #define IDECD_DEBUG_LOG 1
57
58 #if IDECD_DEBUG_LOG
59 #define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args)
60 #else
61 #define ide_debug_log(lvl, fmt, args...) do {} while (0)
62 #endif
63
64 static DEFINE_MUTEX(idecd_ref_mutex);
65
66 static void ide_cd_release(struct kref *);
67
68 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
69 {
70 struct cdrom_info *cd = NULL;
71
72 mutex_lock(&idecd_ref_mutex);
73 cd = ide_drv_g(disk, cdrom_info);
74 if (cd) {
75 if (ide_device_get(cd->drive))
76 cd = NULL;
77 else
78 kref_get(&cd->kref);
79
80 }
81 mutex_unlock(&idecd_ref_mutex);
82 return cd;
83 }
84
85 static void ide_cd_put(struct cdrom_info *cd)
86 {
87 ide_drive_t *drive = cd->drive;
88
89 mutex_lock(&idecd_ref_mutex);
90 kref_put(&cd->kref, ide_cd_release);
91 ide_device_put(drive);
92 mutex_unlock(&idecd_ref_mutex);
93 }
94
95 /*
96 * Generic packet command support and error handling routines.
97 */
98
99 /* Mark that we've seen a media change and invalidate our internal buffers. */
100 static void cdrom_saw_media_change(ide_drive_t *drive)
101 {
102 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
103 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
104 }
105
106 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
107 struct request_sense *sense)
108 {
109 int log = 0;
110
111 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
112 sense->sense_key);
113
114 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
115 return 0;
116
117 switch (sense->sense_key) {
118 case NO_SENSE:
119 case RECOVERED_ERROR:
120 break;
121 case NOT_READY:
122 /*
123 * don't care about tray state messages for e.g. capacity
124 * commands or in-progress or becoming ready
125 */
126 if (sense->asc == 0x3a || sense->asc == 0x04)
127 break;
128 log = 1;
129 break;
130 case ILLEGAL_REQUEST:
131 /*
132 * don't log START_STOP unit with LoEj set, since we cannot
133 * reliably check if drive can auto-close
134 */
135 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
136 break;
137 log = 1;
138 break;
139 case UNIT_ATTENTION:
140 /*
141 * Make good and sure we've seen this potential media change.
142 * Some drives (i.e. Creative) fail to present the correct sense
143 * key in the error register.
144 */
145 cdrom_saw_media_change(drive);
146 break;
147 default:
148 log = 1;
149 break;
150 }
151 return log;
152 }
153
154 static void cdrom_analyze_sense_data(ide_drive_t *drive,
155 struct request *failed_command,
156 struct request_sense *sense)
157 {
158 unsigned long sector;
159 unsigned long bio_sectors;
160 struct cdrom_info *info = drive->driver_data;
161
162 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
163 "sense_key: 0x%x\n", __func__, sense->error_code,
164 sense->sense_key);
165
166 if (failed_command)
167 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
168 __func__, failed_command->cmd[0]);
169
170 if (!cdrom_log_sense(drive, failed_command, sense))
171 return;
172
173 /*
174 * If a read toc is executed for a CD-R or CD-RW medium where the first
175 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
176 * confusing error)
177 */
178 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
179 if (sense->sense_key == 0x05 && sense->asc == 0x24)
180 return;
181
182 /* current error */
183 if (sense->error_code == 0x70) {
184 switch (sense->sense_key) {
185 case MEDIUM_ERROR:
186 case VOLUME_OVERFLOW:
187 case ILLEGAL_REQUEST:
188 if (!sense->valid)
189 break;
190 if (failed_command == NULL ||
191 !blk_fs_request(failed_command))
192 break;
193 sector = (sense->information[0] << 24) |
194 (sense->information[1] << 16) |
195 (sense->information[2] << 8) |
196 (sense->information[3]);
197
198 if (drive->queue->hardsect_size == 2048)
199 /* device sector size is 2K */
200 sector <<= 2;
201
202 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
203 sector &= ~(bio_sectors - 1);
204
205 if (sector < get_capacity(info->disk) &&
206 drive->probed_capacity - sector < 4 * 75)
207 set_capacity(info->disk, sector);
208 }
209 }
210
211 ide_cd_log_error(drive->name, failed_command, sense);
212 }
213
214 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
215 struct request *failed_command)
216 {
217 struct cdrom_info *info = drive->driver_data;
218 struct request *rq = &info->request_sense_request;
219
220 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
221
222 if (sense == NULL)
223 sense = &info->sense_data;
224
225 /* stuff the sense request in front of our current request */
226 blk_rq_init(NULL, rq);
227 rq->cmd_type = REQ_TYPE_ATA_PC;
228 rq->rq_disk = info->disk;
229
230 rq->data = sense;
231 rq->cmd[0] = GPCMD_REQUEST_SENSE;
232 rq->cmd[4] = 18;
233 rq->data_len = 18;
234
235 rq->cmd_type = REQ_TYPE_SENSE;
236 rq->cmd_flags |= REQ_PREEMPT;
237
238 /* NOTE! Save the failed command in "rq->buffer" */
239 rq->buffer = (void *) failed_command;
240
241 if (failed_command)
242 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
243 failed_command->cmd[0]);
244
245 ide_do_drive_cmd(drive, rq);
246 }
247
248 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
249 {
250 struct request *rq = HWGROUP(drive)->rq;
251 int nsectors = rq->hard_cur_sectors;
252
253 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
254 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
255 nsectors);
256
257 if (blk_sense_request(rq) && uptodate) {
258 /*
259 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
260 * failed request
261 */
262 struct request *failed = (struct request *) rq->buffer;
263 struct cdrom_info *info = drive->driver_data;
264 void *sense = &info->sense_data;
265 unsigned long flags;
266
267 if (failed) {
268 if (failed->sense) {
269 sense = failed->sense;
270 failed->sense_len = rq->sense_len;
271 }
272 cdrom_analyze_sense_data(drive, failed, sense);
273 /*
274 * now end the failed request
275 */
276 if (blk_fs_request(failed)) {
277 if (ide_end_dequeued_request(drive, failed, 0,
278 failed->hard_nr_sectors))
279 BUG();
280 } else {
281 spin_lock_irqsave(&ide_lock, flags);
282 if (__blk_end_request(failed, -EIO,
283 failed->data_len))
284 BUG();
285 spin_unlock_irqrestore(&ide_lock, flags);
286 }
287 } else
288 cdrom_analyze_sense_data(drive, NULL, sense);
289 }
290
291 if (!rq->current_nr_sectors && blk_fs_request(rq))
292 uptodate = 1;
293 /* make sure it's fully ended */
294 if (blk_pc_request(rq))
295 nsectors = (rq->data_len + 511) >> 9;
296 if (!nsectors)
297 nsectors = 1;
298
299 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
300 __func__, uptodate, nsectors);
301
302 ide_end_request(drive, uptodate, nsectors);
303 }
304
305 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
306 {
307 if (st & 0x80)
308 return;
309 ide_dump_status(drive, msg, st);
310 }
311
312 /*
313 * Returns:
314 * 0: if the request should be continued.
315 * 1: if the request was ended.
316 */
317 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
318 {
319 ide_hwif_t *hwif = drive->hwif;
320 ide_hwgroup_t *hwgroup = hwif->hwgroup;
321 struct request *rq = hwgroup->rq;
322 int stat, err, sense_key;
323
324 /* check for errors */
325 stat = hwif->tp_ops->read_status(hwif);
326
327 if (stat_ret)
328 *stat_ret = stat;
329
330 if (OK_STAT(stat, good_stat, BAD_R_STAT))
331 return 0;
332
333 /* get the IDE error register */
334 err = ide_read_error(drive);
335 sense_key = err >> 4;
336
337 if (rq == NULL) {
338 printk(KERN_ERR PFX "%s: missing rq in %s\n",
339 drive->name, __func__);
340 return 1;
341 }
342
343 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
344 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
345 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
346
347 if (blk_sense_request(rq)) {
348 /*
349 * We got an error trying to get sense info from the drive
350 * (probably while trying to recover from a former error).
351 * Just give up.
352 */
353 rq->cmd_flags |= REQ_FAILED;
354 cdrom_end_request(drive, 0);
355 ide_error(drive, "request sense failure", stat);
356 return 1;
357
358 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
359 /* All other functions, except for READ. */
360
361 /*
362 * if we have an error, pass back CHECK_CONDITION as the
363 * scsi status byte
364 */
365 if (blk_pc_request(rq) && !rq->errors)
366 rq->errors = SAM_STAT_CHECK_CONDITION;
367
368 /* check for tray open */
369 if (sense_key == NOT_READY) {
370 cdrom_saw_media_change(drive);
371 } else if (sense_key == UNIT_ATTENTION) {
372 /* check for media change */
373 cdrom_saw_media_change(drive);
374 return 0;
375 } else if (sense_key == ILLEGAL_REQUEST &&
376 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
377 /*
378 * Don't print error message for this condition--
379 * SFF8090i indicates that 5/24/00 is the correct
380 * response to a request to close the tray if the
381 * drive doesn't have that capability.
382 * cdrom_log_sense() knows this!
383 */
384 } else if (!(rq->cmd_flags & REQ_QUIET)) {
385 /* otherwise, print an error */
386 ide_dump_status(drive, "packet command error", stat);
387 }
388
389 rq->cmd_flags |= REQ_FAILED;
390
391 /*
392 * instead of playing games with moving completions around,
393 * remove failed request completely and end it when the
394 * request sense has completed
395 */
396 goto end_request;
397
398 } else if (blk_fs_request(rq)) {
399 int do_end_request = 0;
400
401 /* handle errors from READ and WRITE requests */
402
403 if (blk_noretry_request(rq))
404 do_end_request = 1;
405
406 if (sense_key == NOT_READY) {
407 /* tray open */
408 if (rq_data_dir(rq) == READ) {
409 cdrom_saw_media_change(drive);
410
411 /* fail the request */
412 printk(KERN_ERR PFX "%s: tray open\n",
413 drive->name);
414 do_end_request = 1;
415 } else {
416 struct cdrom_info *info = drive->driver_data;
417
418 /*
419 * Allow the drive 5 seconds to recover, some
420 * devices will return this error while flushing
421 * data from cache.
422 */
423 if (!rq->errors)
424 info->write_timeout = jiffies +
425 ATAPI_WAIT_WRITE_BUSY;
426 rq->errors = 1;
427 if (time_after(jiffies, info->write_timeout))
428 do_end_request = 1;
429 else {
430 unsigned long flags;
431
432 /*
433 * take a breather relying on the unplug
434 * timer to kick us again
435 */
436 spin_lock_irqsave(&ide_lock, flags);
437 blk_plug_device(drive->queue);
438 spin_unlock_irqrestore(&ide_lock,
439 flags);
440 return 1;
441 }
442 }
443 } else if (sense_key == UNIT_ATTENTION) {
444 /* media change */
445 cdrom_saw_media_change(drive);
446
447 /*
448 * Arrange to retry the request but be sure to give up
449 * if we've retried too many times.
450 */
451 if (++rq->errors > ERROR_MAX)
452 do_end_request = 1;
453 } else if (sense_key == ILLEGAL_REQUEST ||
454 sense_key == DATA_PROTECT) {
455 /*
456 * No point in retrying after an illegal request or data
457 * protect error.
458 */
459 ide_dump_status_no_sense(drive, "command error", stat);
460 do_end_request = 1;
461 } else if (sense_key == MEDIUM_ERROR) {
462 /*
463 * No point in re-trying a zillion times on a bad
464 * sector. If we got here the error is not correctable.
465 */
466 ide_dump_status_no_sense(drive,
467 "media error (bad sector)",
468 stat);
469 do_end_request = 1;
470 } else if (sense_key == BLANK_CHECK) {
471 /* disk appears blank ?? */
472 ide_dump_status_no_sense(drive, "media error (blank)",
473 stat);
474 do_end_request = 1;
475 } else if ((err & ~ATA_ABORTED) != 0) {
476 /* go to the default handler for other errors */
477 ide_error(drive, "cdrom_decode_status", stat);
478 return 1;
479 } else if ((++rq->errors > ERROR_MAX)) {
480 /* we've racked up too many retries, abort */
481 do_end_request = 1;
482 }
483
484 /*
485 * End a request through request sense analysis when we have
486 * sense data. We need this in order to perform end of media
487 * processing.
488 */
489 if (do_end_request)
490 goto end_request;
491
492 /*
493 * If we got a CHECK_CONDITION status, queue
494 * a request sense command.
495 */
496 if (stat & ATA_ERR)
497 cdrom_queue_request_sense(drive, NULL, NULL);
498 } else {
499 blk_dump_rq_flags(rq, PFX "bad rq");
500 cdrom_end_request(drive, 0);
501 }
502
503 /* retry, or handle the next request */
504 return 1;
505
506 end_request:
507 if (stat & ATA_ERR) {
508 unsigned long flags;
509
510 spin_lock_irqsave(&ide_lock, flags);
511 blkdev_dequeue_request(rq);
512 spin_unlock_irqrestore(&ide_lock, flags);
513
514 hwgroup->rq = NULL;
515
516 cdrom_queue_request_sense(drive, rq->sense, rq);
517 } else
518 cdrom_end_request(drive, 0);
519
520 return 1;
521 }
522
523 static int cdrom_timer_expiry(ide_drive_t *drive)
524 {
525 struct request *rq = HWGROUP(drive)->rq;
526 unsigned long wait = 0;
527
528 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__,
529 rq->cmd[0]);
530
531 /*
532 * Some commands are *slow* and normally take a long time to complete.
533 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
534 * commands/drives support that. Let ide_timer_expiry keep polling us
535 * for these.
536 */
537 switch (rq->cmd[0]) {
538 case GPCMD_BLANK:
539 case GPCMD_FORMAT_UNIT:
540 case GPCMD_RESERVE_RZONE_TRACK:
541 case GPCMD_CLOSE_TRACK:
542 case GPCMD_FLUSH_CACHE:
543 wait = ATAPI_WAIT_PC;
544 break;
545 default:
546 if (!(rq->cmd_flags & REQ_QUIET))
547 printk(KERN_INFO PFX "cmd 0x%x timed out\n",
548 rq->cmd[0]);
549 wait = 0;
550 break;
551 }
552 return wait;
553 }
554
555 /*
556 * Set up the device registers for transferring a packet command on DEV,
557 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
558 * which actually transfers the command to the drive. If this is a
559 * drq_interrupt device, this routine will arrange for HANDLER to be
560 * called when the interrupt from the drive arrives. Otherwise, HANDLER
561 * will be called immediately after the drive is prepared for the transfer.
562 */
563 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
564 int xferlen,
565 ide_handler_t *handler)
566 {
567 ide_hwif_t *hwif = drive->hwif;
568
569 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
570
571 /* FIXME: for Virtual DMA we must check harder */
572 if (drive->dma)
573 drive->dma = !hwif->dma_ops->dma_setup(drive);
574
575 /* set up the controller registers */
576 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
577 xferlen, drive->dma);
578
579 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
580 /* waiting for CDB interrupt, not DMA yet. */
581 if (drive->dma)
582 drive->waiting_for_dma = 0;
583
584 /* packet command */
585 ide_execute_command(drive, ATA_CMD_PACKET, handler,
586 ATAPI_WAIT_PC, cdrom_timer_expiry);
587 return ide_started;
588 } else {
589 ide_execute_pkt_cmd(drive);
590
591 return (*handler) (drive);
592 }
593 }
594
595 /*
596 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
597 * registers must have already been prepared by cdrom_start_packet_command.
598 * HANDLER is the interrupt handler to call when the command completes or
599 * there's data ready.
600 */
601 #define ATAPI_MIN_CDB_BYTES 12
602 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
603 struct request *rq,
604 ide_handler_t *handler)
605 {
606 ide_hwif_t *hwif = drive->hwif;
607 int cmd_len;
608 ide_startstop_t startstop;
609
610 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
611
612 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
613 /*
614 * Here we should have been called after receiving an interrupt
615 * from the device. DRQ should how be set.
616 */
617
618 /* check for errors */
619 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
620 return ide_stopped;
621
622 /* ok, next interrupt will be DMA interrupt */
623 if (drive->dma)
624 drive->waiting_for_dma = 1;
625 } else {
626 /* otherwise, we must wait for DRQ to get set */
627 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
628 ATA_BUSY, WAIT_READY))
629 return startstop;
630 }
631
632 /* arm the interrupt handler */
633 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
634
635 /* ATAPI commands get padded out to 12 bytes minimum */
636 cmd_len = COMMAND_SIZE(rq->cmd[0]);
637 if (cmd_len < ATAPI_MIN_CDB_BYTES)
638 cmd_len = ATAPI_MIN_CDB_BYTES;
639
640 /* send the command to the device */
641 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
642
643 /* start the DMA if need be */
644 if (drive->dma)
645 hwif->dma_ops->dma_start(drive);
646
647 return ide_started;
648 }
649
650 /*
651 * Check the contents of the interrupt reason register from the cdrom
652 * and attempt to recover if there are problems. Returns 0 if everything's
653 * ok; nonzero if the request has been terminated.
654 */
655 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
656 int len, int ireason, int rw)
657 {
658 ide_hwif_t *hwif = drive->hwif;
659
660 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
661 __func__, ireason, rw);
662
663 /*
664 * ireason == 0: the drive wants to receive data from us
665 * ireason == 2: the drive is expecting to transfer data to us
666 */
667 if (ireason == (!rw << 1))
668 return 0;
669 else if (ireason == (rw << 1)) {
670
671 /* whoops... */
672 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
673 drive->name, __func__);
674
675 ide_pad_transfer(drive, rw, len);
676 } else if (rw == 0 && ireason == 1) {
677 /*
678 * Some drives (ASUS) seem to tell us that status info is
679 * available. Just get it and ignore.
680 */
681 (void)hwif->tp_ops->read_status(hwif);
682 return 0;
683 } else {
684 /* drive wants a command packet, or invalid ireason... */
685 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
686 drive->name, __func__, ireason);
687 }
688
689 if (rq->cmd_type == REQ_TYPE_ATA_PC)
690 rq->cmd_flags |= REQ_FAILED;
691
692 cdrom_end_request(drive, 0);
693 return -1;
694 }
695
696 /*
697 * Assume that the drive will always provide data in multiples of at least
698 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
699 */
700 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
701 {
702 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
703
704 if ((len % SECTOR_SIZE) == 0)
705 return 0;
706
707 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
708 __func__, len);
709
710 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
711 printk(KERN_ERR PFX "This drive is not supported by this "
712 "version of the driver\n");
713 else {
714 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
715 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
716 }
717
718 return 1;
719 }
720
721 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
722
723 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
724 struct request *rq)
725 {
726 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
727 rq->cmd_flags);
728
729 if (rq_data_dir(rq) == READ) {
730 unsigned short sectors_per_frame =
731 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
732 int nskip = rq->sector & (sectors_per_frame - 1);
733
734 /*
735 * If the requested sector doesn't start on a frame boundary,
736 * we must adjust the start of the transfer so that it does,
737 * and remember to skip the first few sectors.
738 *
739 * If the rq->current_nr_sectors field is larger than the size
740 * of the buffer, it will mean that we're to skip a number of
741 * sectors equal to the amount by which rq->current_nr_sectors
742 * is larger than the buffer size.
743 */
744 if (nskip > 0) {
745 /* sanity check... */
746 if (rq->current_nr_sectors !=
747 bio_cur_sectors(rq->bio)) {
748 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
749 drive->name, __func__,
750 rq->current_nr_sectors);
751 cdrom_end_request(drive, 0);
752 return ide_stopped;
753 }
754 rq->current_nr_sectors += nskip;
755 }
756 }
757
758 /* set up the command */
759 rq->timeout = ATAPI_WAIT_PC;
760
761 return ide_started;
762 }
763
764 /*
765 * Routine to send a read/write packet command to the drive. This is usually
766 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
767 * devices, it is called from an interrupt when the drive is ready to accept
768 * the command.
769 */
770 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
771 {
772 struct request *rq = drive->hwif->hwgroup->rq;
773
774 /* send the command to the drive and return */
775 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
776 }
777
778 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
779 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
780 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
781
782 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
783 {
784 struct cdrom_info *info = drive->driver_data;
785 int stat;
786 static int retry = 10;
787
788 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
789
790 if (cdrom_decode_status(drive, 0, &stat))
791 return ide_stopped;
792
793 drive->atapi_flags |= IDE_AFLAG_SEEKING;
794
795 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
796 if (--retry == 0)
797 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
798 }
799 return ide_stopped;
800 }
801
802 static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq)
803 {
804 sector_t frame = rq->sector;
805
806 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
807
808 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
809
810 memset(rq->cmd, 0, BLK_MAX_CDB);
811 rq->cmd[0] = GPCMD_SEEK;
812 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
813
814 rq->timeout = ATAPI_WAIT_PC;
815 }
816
817 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
818 {
819 struct request *rq = drive->hwif->hwgroup->rq;
820
821 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
822 }
823
824 /*
825 * Fix up a possibly partially-processed request so that we can start it over
826 * entirely, or even put it back on the request queue.
827 */
828 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
829 {
830
831 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
832
833 if (rq->buffer != bio_data(rq->bio)) {
834 sector_t n =
835 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
836
837 rq->buffer = bio_data(rq->bio);
838 rq->nr_sectors += n;
839 rq->sector -= n;
840 }
841 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
842 rq->hard_cur_sectors = rq->current_nr_sectors;
843 rq->hard_nr_sectors = rq->nr_sectors;
844 rq->hard_sector = rq->sector;
845 rq->q->prep_rq_fn(rq->q, rq);
846 }
847
848 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
849 {
850 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
851 __func__, rq->cmd[0]);
852
853 /*
854 * Some of the trailing request sense fields are optional,
855 * and some drives don't send them. Sigh.
856 */
857 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
858 rq->data_len > 0 && rq->data_len <= 5)
859 while (rq->data_len > 0) {
860 *(u8 *)rq->data++ = 0;
861 --rq->data_len;
862 }
863 }
864
865 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
866 int write, void *buffer, unsigned *bufflen,
867 struct request_sense *sense, int timeout,
868 unsigned int cmd_flags)
869 {
870 struct cdrom_info *info = drive->driver_data;
871 struct request_sense local_sense;
872 int retries = 10;
873 unsigned int flags = 0;
874
875 if (!sense)
876 sense = &local_sense;
877
878 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
879 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
880 timeout, cmd_flags);
881
882 /* start of retry loop */
883 do {
884 struct request *rq;
885 int error;
886
887 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
888
889 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
890 rq->cmd_type = REQ_TYPE_ATA_PC;
891 rq->sense = sense;
892 rq->cmd_flags |= cmd_flags;
893 rq->timeout = timeout;
894 if (buffer) {
895 rq->data = buffer;
896 rq->data_len = *bufflen;
897 }
898
899 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
900
901 if (buffer)
902 *bufflen = rq->data_len;
903
904 flags = rq->cmd_flags;
905 blk_put_request(rq);
906
907 /*
908 * FIXME: we should probably abort/retry or something in case of
909 * failure.
910 */
911 if (flags & REQ_FAILED) {
912 /*
913 * The request failed. Retry if it was due to a unit
914 * attention status (usually means media was changed).
915 */
916 struct request_sense *reqbuf = sense;
917
918 if (reqbuf->sense_key == UNIT_ATTENTION)
919 cdrom_saw_media_change(drive);
920 else if (reqbuf->sense_key == NOT_READY &&
921 reqbuf->asc == 4 && reqbuf->ascq != 4) {
922 /*
923 * The drive is in the process of loading
924 * a disk. Retry, but wait a little to give
925 * the drive time to complete the load.
926 */
927 ssleep(2);
928 } else {
929 /* otherwise, don't retry */
930 retries = 0;
931 }
932 --retries;
933 }
934
935 /* end of retry loop */
936 } while ((flags & REQ_FAILED) && retries >= 0);
937
938 /* return an error if the command failed */
939 return (flags & REQ_FAILED) ? -EIO : 0;
940 }
941
942 /*
943 * Called from blk_end_request_callback() after the data of the request is
944 * completed and before the request itself is completed. By returning value '1',
945 * blk_end_request_callback() returns immediately without completing it.
946 */
947 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
948 {
949 return 1;
950 }
951
952 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
953 {
954 ide_hwif_t *hwif = drive->hwif;
955 ide_hwgroup_t *hwgroup = hwif->hwgroup;
956 struct request *rq = hwgroup->rq;
957 xfer_func_t *xferfunc;
958 ide_expiry_t *expiry = NULL;
959 int dma_error = 0, dma, stat, thislen, uptodate = 0;
960 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
961 unsigned int timeout;
962 u16 len;
963 u8 ireason;
964
965 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
966 __func__, rq->cmd[0], write);
967
968 /* check for errors */
969 dma = drive->dma;
970 if (dma) {
971 drive->dma = 0;
972 dma_error = hwif->dma_ops->dma_end(drive);
973 if (dma_error) {
974 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
975 write ? "write" : "read");
976 ide_dma_off(drive);
977 }
978 }
979
980 if (cdrom_decode_status(drive, 0, &stat))
981 return ide_stopped;
982
983 /* using dma, transfer is complete now */
984 if (dma) {
985 if (dma_error)
986 return ide_error(drive, "dma error", stat);
987 if (blk_fs_request(rq)) {
988 ide_end_request(drive, 1, rq->nr_sectors);
989 return ide_stopped;
990 }
991 goto end_request;
992 }
993
994 ide_read_bcount_and_ireason(drive, &len, &ireason);
995
996 thislen = blk_fs_request(rq) ? len : rq->data_len;
997 if (thislen > len)
998 thislen = len;
999
1000 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
1001 __func__, stat, thislen);
1002
1003 /* If DRQ is clear, the command has completed. */
1004 if ((stat & ATA_DRQ) == 0) {
1005 if (blk_fs_request(rq)) {
1006 /*
1007 * If we're not done reading/writing, complain.
1008 * Otherwise, complete the command normally.
1009 */
1010 uptodate = 1;
1011 if (rq->current_nr_sectors > 0) {
1012 printk(KERN_ERR PFX "%s: %s: data underrun "
1013 "(%d blocks)\n",
1014 drive->name, __func__,
1015 rq->current_nr_sectors);
1016 if (!write)
1017 rq->cmd_flags |= REQ_FAILED;
1018 uptodate = 0;
1019 }
1020 cdrom_end_request(drive, uptodate);
1021 return ide_stopped;
1022 } else if (!blk_pc_request(rq)) {
1023 ide_cd_request_sense_fixup(drive, rq);
1024 /* complain if we still have data left to transfer */
1025 uptodate = rq->data_len ? 0 : 1;
1026 }
1027 goto end_request;
1028 }
1029
1030 /* check which way to transfer data */
1031 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
1032 return ide_stopped;
1033
1034 if (blk_fs_request(rq)) {
1035 if (write == 0) {
1036 int nskip;
1037
1038 if (ide_cd_check_transfer_size(drive, len)) {
1039 cdrom_end_request(drive, 0);
1040 return ide_stopped;
1041 }
1042
1043 /*
1044 * First, figure out if we need to bit-bucket
1045 * any of the leading sectors.
1046 */
1047 nskip = min_t(int, rq->current_nr_sectors
1048 - bio_cur_sectors(rq->bio),
1049 thislen >> 9);
1050 if (nskip > 0) {
1051 ide_pad_transfer(drive, write, nskip << 9);
1052 rq->current_nr_sectors -= nskip;
1053 thislen -= (nskip << 9);
1054 }
1055 }
1056 }
1057
1058 if (ireason == 0) {
1059 write = 1;
1060 xferfunc = hwif->tp_ops->output_data;
1061 } else {
1062 write = 0;
1063 xferfunc = hwif->tp_ops->input_data;
1064 }
1065
1066 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
1067 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
1068
1069 /* transfer data */
1070 while (thislen > 0) {
1071 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1072 int blen = rq->data_len;
1073
1074 /* bio backed? */
1075 if (rq->bio) {
1076 if (blk_fs_request(rq)) {
1077 ptr = rq->buffer;
1078 blen = rq->current_nr_sectors << 9;
1079 } else {
1080 ptr = bio_data(rq->bio);
1081 blen = bio_iovec(rq->bio)->bv_len;
1082 }
1083 }
1084
1085 if (!ptr) {
1086 if (blk_fs_request(rq) && !write)
1087 /*
1088 * If the buffers are full, pipe the rest into
1089 * oblivion.
1090 */
1091 ide_pad_transfer(drive, 0, thislen);
1092 else {
1093 printk(KERN_ERR PFX "%s: confused, missing data\n",
1094 drive->name);
1095 blk_dump_rq_flags(rq, rq_data_dir(rq)
1096 ? "cdrom_newpc_intr, write"
1097 : "cdrom_newpc_intr, read");
1098 }
1099 break;
1100 }
1101
1102 if (blen > thislen)
1103 blen = thislen;
1104
1105 xferfunc(drive, NULL, ptr, blen);
1106
1107 thislen -= blen;
1108 len -= blen;
1109
1110 if (blk_fs_request(rq)) {
1111 rq->buffer += blen;
1112 rq->nr_sectors -= (blen >> 9);
1113 rq->current_nr_sectors -= (blen >> 9);
1114 rq->sector += (blen >> 9);
1115
1116 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1117 cdrom_end_request(drive, 1);
1118 } else {
1119 rq->data_len -= blen;
1120
1121 /*
1122 * The request can't be completed until DRQ is cleared.
1123 * So complete the data, but don't complete the request
1124 * using the dummy function for the callback feature
1125 * of blk_end_request_callback().
1126 */
1127 if (rq->bio)
1128 blk_end_request_callback(rq, 0, blen,
1129 cdrom_newpc_intr_dummy_cb);
1130 else
1131 rq->data += blen;
1132 }
1133 if (!write && blk_sense_request(rq))
1134 rq->sense_len += blen;
1135 }
1136
1137 /* pad, if necessary */
1138 if (!blk_fs_request(rq) && len > 0)
1139 ide_pad_transfer(drive, write, len);
1140
1141 if (blk_pc_request(rq)) {
1142 timeout = rq->timeout;
1143 } else {
1144 timeout = ATAPI_WAIT_PC;
1145 if (!blk_fs_request(rq))
1146 expiry = cdrom_timer_expiry;
1147 }
1148
1149 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1150 return ide_started;
1151
1152 end_request:
1153 if (blk_pc_request(rq)) {
1154 unsigned long flags;
1155 unsigned int dlen = rq->data_len;
1156
1157 if (dma)
1158 rq->data_len = 0;
1159
1160 spin_lock_irqsave(&ide_lock, flags);
1161 if (__blk_end_request(rq, 0, dlen))
1162 BUG();
1163 spin_unlock_irqrestore(&ide_lock, flags);
1164
1165 hwgroup->rq = NULL;
1166 } else {
1167 if (!uptodate)
1168 rq->cmd_flags |= REQ_FAILED;
1169 cdrom_end_request(drive, uptodate);
1170 }
1171 return ide_stopped;
1172 }
1173
1174 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1175 {
1176 struct cdrom_info *cd = drive->driver_data;
1177 int write = rq_data_dir(rq) == WRITE;
1178 unsigned short sectors_per_frame =
1179 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1180
1181 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1182 "secs_per_frame: %u\n",
1183 __func__, rq->cmd[0], write, sectors_per_frame);
1184
1185 if (write) {
1186 /* disk has become write protected */
1187 if (get_disk_ro(cd->disk)) {
1188 cdrom_end_request(drive, 0);
1189 return ide_stopped;
1190 }
1191 } else {
1192 /*
1193 * We may be retrying this request after an error. Fix up any
1194 * weirdness which might be present in the request packet.
1195 */
1196 ide_cd_restore_request(drive, rq);
1197 }
1198
1199 /* use DMA, if possible / writes *must* be hardware frame aligned */
1200 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1201 (rq->sector & (sectors_per_frame - 1))) {
1202 if (write) {
1203 cdrom_end_request(drive, 0);
1204 return ide_stopped;
1205 }
1206 drive->dma = 0;
1207 } else
1208 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1209
1210 if (write)
1211 cd->devinfo.media_written = 1;
1212
1213 return ide_started;
1214 }
1215
1216 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1217 {
1218 struct request *rq = HWGROUP(drive)->rq;
1219
1220 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1221 }
1222
1223 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1224 {
1225
1226 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1227 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1228 rq->cmd_type);
1229
1230 if (blk_pc_request(rq))
1231 rq->cmd_flags |= REQ_QUIET;
1232 else
1233 rq->cmd_flags &= ~REQ_FAILED;
1234
1235 drive->dma = 0;
1236
1237 /* sg request */
1238 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1239 struct request_queue *q = drive->queue;
1240 unsigned int alignment;
1241 char *buf;
1242
1243 if (rq->bio)
1244 buf = bio_data(rq->bio);
1245 else
1246 buf = rq->data;
1247
1248 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1249
1250 /*
1251 * check if dma is safe
1252 *
1253 * NOTE! The "len" and "addr" checks should possibly have
1254 * separate masks.
1255 */
1256 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1257 if ((unsigned long)buf & alignment
1258 || rq->data_len & q->dma_pad_mask
1259 || object_is_on_stack(buf))
1260 drive->dma = 0;
1261 }
1262 }
1263
1264 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1265 sector_t block)
1266 {
1267 struct cdrom_info *info = drive->driver_data;
1268 ide_handler_t *fn;
1269 int xferlen;
1270
1271 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1272 "rq->cmd_type: 0x%x, block: %llu\n",
1273 __func__, rq->cmd[0], rq->cmd_type,
1274 (unsigned long long)block);
1275
1276 if (blk_fs_request(rq)) {
1277 if (drive->atapi_flags & IDE_AFLAG_SEEKING) {
1278 ide_hwif_t *hwif = drive->hwif;
1279 unsigned long elapsed = jiffies - info->start_seek;
1280 int stat = hwif->tp_ops->read_status(hwif);
1281
1282 if ((stat & ATA_DSC) != ATA_DSC) {
1283 if (elapsed < IDECD_SEEK_TIMEOUT) {
1284 ide_stall_queue(drive,
1285 IDECD_SEEK_TIMER);
1286 return ide_stopped;
1287 }
1288 printk(KERN_ERR PFX "%s: DSC timeout\n",
1289 drive->name);
1290 }
1291 drive->atapi_flags &= ~IDE_AFLAG_SEEKING;
1292 }
1293 if (rq_data_dir(rq) == READ &&
1294 IDE_LARGE_SEEK(info->last_block, block,
1295 IDECD_SEEK_THRESHOLD) &&
1296 (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) {
1297 xferlen = 0;
1298 fn = cdrom_start_seek_continuation;
1299
1300 drive->dma = 0;
1301 info->start_seek = jiffies;
1302
1303 ide_cd_prepare_seek_request(drive, rq);
1304 } else {
1305 xferlen = 32768;
1306 fn = cdrom_start_rw_cont;
1307
1308 if (cdrom_start_rw(drive, rq) == ide_stopped)
1309 return ide_stopped;
1310
1311 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1312 return ide_stopped;
1313 }
1314 info->last_block = block;
1315 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1316 rq->cmd_type == REQ_TYPE_ATA_PC) {
1317 xferlen = rq->data_len;
1318 fn = cdrom_do_newpc_cont;
1319
1320 if (!rq->timeout)
1321 rq->timeout = ATAPI_WAIT_PC;
1322
1323 cdrom_do_block_pc(drive, rq);
1324 } else if (blk_special_request(rq)) {
1325 /* right now this can only be a reset... */
1326 cdrom_end_request(drive, 1);
1327 return ide_stopped;
1328 } else {
1329 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1330 cdrom_end_request(drive, 0);
1331 return ide_stopped;
1332 }
1333
1334 return cdrom_start_packet_command(drive, xferlen, fn);
1335 }
1336
1337 /*
1338 * Ioctl handling.
1339 *
1340 * Routines which queue packet commands take as a final argument a pointer to a
1341 * request_sense struct. If execution of the command results in an error with a
1342 * CHECK CONDITION status, this structure will be filled with the results of the
1343 * subsequent request sense command. The pointer can also be NULL, in which case
1344 * no sense information is returned.
1345 */
1346 static void msf_from_bcd(struct atapi_msf *msf)
1347 {
1348 msf->minute = bcd2bin(msf->minute);
1349 msf->second = bcd2bin(msf->second);
1350 msf->frame = bcd2bin(msf->frame);
1351 }
1352
1353 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1354 {
1355 struct cdrom_info *info = drive->driver_data;
1356 struct cdrom_device_info *cdi = &info->devinfo;
1357 unsigned char cmd[BLK_MAX_CDB];
1358
1359 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1360
1361 memset(cmd, 0, BLK_MAX_CDB);
1362 cmd[0] = GPCMD_TEST_UNIT_READY;
1363
1364 /*
1365 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1366 * instead of supporting the LOAD_UNLOAD opcode.
1367 */
1368 cmd[7] = cdi->sanyo_slot % 3;
1369
1370 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1371 }
1372
1373 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1374 unsigned long *sectors_per_frame,
1375 struct request_sense *sense)
1376 {
1377 struct {
1378 __be32 lba;
1379 __be32 blocklen;
1380 } capbuf;
1381
1382 int stat;
1383 unsigned char cmd[BLK_MAX_CDB];
1384 unsigned len = sizeof(capbuf);
1385 u32 blocklen;
1386
1387 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1388
1389 memset(cmd, 0, BLK_MAX_CDB);
1390 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1391
1392 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1393 REQ_QUIET);
1394 if (stat)
1395 return stat;
1396
1397 /*
1398 * Sanity check the given block size
1399 */
1400 blocklen = be32_to_cpu(capbuf.blocklen);
1401 switch (blocklen) {
1402 case 512:
1403 case 1024:
1404 case 2048:
1405 case 4096:
1406 break;
1407 default:
1408 printk(KERN_ERR PFX "%s: weird block size %u\n",
1409 drive->name, blocklen);
1410 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1411 drive->name);
1412 blocklen = 2048;
1413 break;
1414 }
1415
1416 *capacity = 1 + be32_to_cpu(capbuf.lba);
1417 *sectors_per_frame = blocklen >> SECTOR_BITS;
1418
1419 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1420 __func__, *capacity, *sectors_per_frame);
1421
1422 return 0;
1423 }
1424
1425 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1426 int format, char *buf, int buflen,
1427 struct request_sense *sense)
1428 {
1429 unsigned char cmd[BLK_MAX_CDB];
1430
1431 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1432
1433 memset(cmd, 0, BLK_MAX_CDB);
1434
1435 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1436 cmd[6] = trackno;
1437 cmd[7] = (buflen >> 8);
1438 cmd[8] = (buflen & 0xff);
1439 cmd[9] = (format << 6);
1440
1441 if (msf_flag)
1442 cmd[1] = 2;
1443
1444 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1445 }
1446
1447 /* Try to read the entire TOC for the disk into our internal buffer. */
1448 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1449 {
1450 int stat, ntracks, i;
1451 struct cdrom_info *info = drive->driver_data;
1452 struct cdrom_device_info *cdi = &info->devinfo;
1453 struct atapi_toc *toc = info->toc;
1454 struct {
1455 struct atapi_toc_header hdr;
1456 struct atapi_toc_entry ent;
1457 } ms_tmp;
1458 long last_written;
1459 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1460
1461 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1462
1463 if (toc == NULL) {
1464 /* try to allocate space */
1465 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1466 if (toc == NULL) {
1467 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1468 drive->name);
1469 return -ENOMEM;
1470 }
1471 info->toc = toc;
1472 }
1473
1474 /*
1475 * Check to see if the existing data is still valid. If it is,
1476 * just return.
1477 */
1478 (void) cdrom_check_status(drive, sense);
1479
1480 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1481 return 0;
1482
1483 /* try to get the total cdrom capacity and sector size */
1484 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1485 sense);
1486 if (stat)
1487 toc->capacity = 0x1fffff;
1488
1489 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1490 /* save a private copy of the TOC capacity for error handling */
1491 drive->probed_capacity = toc->capacity * sectors_per_frame;
1492
1493 blk_queue_hardsect_size(drive->queue,
1494 sectors_per_frame << SECTOR_BITS);
1495
1496 /* first read just the header, so we know how long the TOC is */
1497 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1498 sizeof(struct atapi_toc_header), sense);
1499 if (stat)
1500 return stat;
1501
1502 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1503 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1504 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1505 }
1506
1507 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1508 if (ntracks <= 0)
1509 return -EIO;
1510 if (ntracks > MAX_TRACKS)
1511 ntracks = MAX_TRACKS;
1512
1513 /* now read the whole schmeer */
1514 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1515 (char *)&toc->hdr,
1516 sizeof(struct atapi_toc_header) +
1517 (ntracks + 1) *
1518 sizeof(struct atapi_toc_entry), sense);
1519
1520 if (stat && toc->hdr.first_track > 1) {
1521 /*
1522 * Cds with CDI tracks only don't have any TOC entries, despite
1523 * of this the returned values are
1524 * first_track == last_track = number of CDI tracks + 1,
1525 * so that this case is indistinguishable from the same layout
1526 * plus an additional audio track. If we get an error for the
1527 * regular case, we assume a CDI without additional audio
1528 * tracks. In this case the readable TOC is empty (CDI tracks
1529 * are not included) and only holds the Leadout entry.
1530 *
1531 * Heiko Eißfeldt.
1532 */
1533 ntracks = 0;
1534 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1535 (char *)&toc->hdr,
1536 sizeof(struct atapi_toc_header) +
1537 (ntracks + 1) *
1538 sizeof(struct atapi_toc_entry),
1539 sense);
1540 if (stat)
1541 return stat;
1542
1543 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1544 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1545 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1546 } else {
1547 toc->hdr.first_track = CDROM_LEADOUT;
1548 toc->hdr.last_track = CDROM_LEADOUT;
1549 }
1550 }
1551
1552 if (stat)
1553 return stat;
1554
1555 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1556
1557 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1558 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1559 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1560 }
1561
1562 for (i = 0; i <= ntracks; i++) {
1563 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1564 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1565 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1566 msf_from_bcd(&toc->ent[i].addr.msf);
1567 }
1568 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1569 toc->ent[i].addr.msf.second,
1570 toc->ent[i].addr.msf.frame);
1571 }
1572
1573 if (toc->hdr.first_track != CDROM_LEADOUT) {
1574 /* read the multisession information */
1575 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1576 sizeof(ms_tmp), sense);
1577 if (stat)
1578 return stat;
1579
1580 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1581 } else {
1582 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1583 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1584 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1585 }
1586
1587 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1588 /* re-read multisession information using MSF format */
1589 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1590 sizeof(ms_tmp), sense);
1591 if (stat)
1592 return stat;
1593
1594 msf_from_bcd(&ms_tmp.ent.addr.msf);
1595 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1596 ms_tmp.ent.addr.msf.second,
1597 ms_tmp.ent.addr.msf.frame);
1598 }
1599
1600 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1601
1602 /* now try to get the total cdrom capacity */
1603 stat = cdrom_get_last_written(cdi, &last_written);
1604 if (!stat && (last_written > toc->capacity)) {
1605 toc->capacity = last_written;
1606 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1607 drive->probed_capacity = toc->capacity * sectors_per_frame;
1608 }
1609
1610 /* Remember that we've read this stuff. */
1611 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1612
1613 return 0;
1614 }
1615
1616 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1617 {
1618 struct cdrom_info *info = drive->driver_data;
1619 struct cdrom_device_info *cdi = &info->devinfo;
1620 struct packet_command cgc;
1621 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1622
1623 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1624
1625 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1626 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1627
1628 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1629 do {
1630 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1631 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1632 if (!stat)
1633 break;
1634 } while (--attempts);
1635 return stat;
1636 }
1637
1638 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1639 {
1640 struct cdrom_info *cd = drive->driver_data;
1641 u16 curspeed, maxspeed;
1642
1643 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1644
1645 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1646 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1647 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1648 } else {
1649 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1650 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1651 }
1652
1653 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1654 __func__, curspeed, maxspeed);
1655
1656 cd->current_speed = (curspeed + (176/2)) / 176;
1657 cd->max_speed = (maxspeed + (176/2)) / 176;
1658 }
1659
1660 #define IDE_CD_CAPABILITIES \
1661 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1662 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1663 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1664 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1665 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1666
1667 static struct cdrom_device_ops ide_cdrom_dops = {
1668 .open = ide_cdrom_open_real,
1669 .release = ide_cdrom_release_real,
1670 .drive_status = ide_cdrom_drive_status,
1671 .media_changed = ide_cdrom_check_media_change_real,
1672 .tray_move = ide_cdrom_tray_move,
1673 .lock_door = ide_cdrom_lock_door,
1674 .select_speed = ide_cdrom_select_speed,
1675 .get_last_session = ide_cdrom_get_last_session,
1676 .get_mcn = ide_cdrom_get_mcn,
1677 .reset = ide_cdrom_reset,
1678 .audio_ioctl = ide_cdrom_audio_ioctl,
1679 .capability = IDE_CD_CAPABILITIES,
1680 .generic_packet = ide_cdrom_packet,
1681 };
1682
1683 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1684 {
1685 struct cdrom_info *info = drive->driver_data;
1686 struct cdrom_device_info *devinfo = &info->devinfo;
1687
1688 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1689
1690 devinfo->ops = &ide_cdrom_dops;
1691 devinfo->speed = info->current_speed;
1692 devinfo->capacity = nslots;
1693 devinfo->handle = drive;
1694 strcpy(devinfo->name, drive->name);
1695
1696 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1697 devinfo->mask |= CDC_SELECT_SPEED;
1698
1699 devinfo->disk = info->disk;
1700 return register_cdrom(devinfo);
1701 }
1702
1703 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1704 {
1705 struct cdrom_info *cd = drive->driver_data;
1706 struct cdrom_device_info *cdi = &cd->devinfo;
1707 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1708 mechtype_t mechtype;
1709 int nslots = 1;
1710
1711 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1712 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1713 drive->atapi_flags);
1714
1715 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1716 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1717 CDC_MO_DRIVE | CDC_RAM);
1718
1719 if (drive->media == ide_optical) {
1720 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1721 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1722 drive->name);
1723 return nslots;
1724 }
1725
1726 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1727 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1728 cdi->mask &= ~CDC_PLAY_AUDIO;
1729 return nslots;
1730 }
1731
1732 /*
1733 * We have to cheat a little here. the packet will eventually be queued
1734 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1735 * Since this device hasn't been registered with the Uniform layer yet,
1736 * it can't do this. Same goes for cdi->ops.
1737 */
1738 cdi->handle = drive;
1739 cdi->ops = &ide_cdrom_dops;
1740
1741 if (ide_cdrom_get_capabilities(drive, buf))
1742 return 0;
1743
1744 if ((buf[8 + 6] & 0x01) == 0)
1745 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1746 if (buf[8 + 6] & 0x08)
1747 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1748 if (buf[8 + 3] & 0x01)
1749 cdi->mask &= ~CDC_CD_R;
1750 if (buf[8 + 3] & 0x02)
1751 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1752 if (buf[8 + 2] & 0x38)
1753 cdi->mask &= ~CDC_DVD;
1754 if (buf[8 + 3] & 0x20)
1755 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1756 if (buf[8 + 3] & 0x10)
1757 cdi->mask &= ~CDC_DVD_R;
1758 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1759 cdi->mask &= ~CDC_PLAY_AUDIO;
1760
1761 mechtype = buf[8 + 6] >> 5;
1762 if (mechtype == mechtype_caddy ||
1763 mechtype == mechtype_popup ||
1764 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1765 cdi->mask |= CDC_CLOSE_TRAY;
1766
1767 if (cdi->sanyo_slot > 0) {
1768 cdi->mask &= ~CDC_SELECT_DISC;
1769 nslots = 3;
1770 } else if (mechtype == mechtype_individual_changer ||
1771 mechtype == mechtype_cartridge_changer) {
1772 nslots = cdrom_number_of_slots(cdi);
1773 if (nslots > 1)
1774 cdi->mask &= ~CDC_SELECT_DISC;
1775 }
1776
1777 ide_cdrom_update_speed(drive, buf);
1778
1779 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1780
1781 /* don't print speed if the drive reported 0 */
1782 if (cd->max_speed)
1783 printk(KERN_CONT " %dX", cd->max_speed);
1784
1785 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1786
1787 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1788 printk(KERN_CONT " DVD%s%s",
1789 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1790 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1791
1792 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1793 printk(KERN_CONT " CD%s%s",
1794 (cdi->mask & CDC_CD_R) ? "" : "-R",
1795 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1796
1797 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1798 printk(KERN_CONT " changer w/%d slots", nslots);
1799 else
1800 printk(KERN_CONT " drive");
1801
1802 printk(KERN_CONT ", %dkB Cache\n",
1803 be16_to_cpup((__be16 *)&buf[8 + 12]));
1804
1805 return nslots;
1806 }
1807
1808 /* standard prep_rq_fn that builds 10 byte cmds */
1809 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1810 {
1811 int hard_sect = queue_hardsect_size(q);
1812 long block = (long)rq->hard_sector / (hard_sect >> 9);
1813 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1814
1815 memset(rq->cmd, 0, BLK_MAX_CDB);
1816
1817 if (rq_data_dir(rq) == READ)
1818 rq->cmd[0] = GPCMD_READ_10;
1819 else
1820 rq->cmd[0] = GPCMD_WRITE_10;
1821
1822 /*
1823 * fill in lba
1824 */
1825 rq->cmd[2] = (block >> 24) & 0xff;
1826 rq->cmd[3] = (block >> 16) & 0xff;
1827 rq->cmd[4] = (block >> 8) & 0xff;
1828 rq->cmd[5] = block & 0xff;
1829
1830 /*
1831 * and transfer length
1832 */
1833 rq->cmd[7] = (blocks >> 8) & 0xff;
1834 rq->cmd[8] = blocks & 0xff;
1835 rq->cmd_len = 10;
1836 return BLKPREP_OK;
1837 }
1838
1839 /*
1840 * Most of the SCSI commands are supported directly by ATAPI devices.
1841 * This transform handles the few exceptions.
1842 */
1843 static int ide_cdrom_prep_pc(struct request *rq)
1844 {
1845 u8 *c = rq->cmd;
1846
1847 /* transform 6-byte read/write commands to the 10-byte version */
1848 if (c[0] == READ_6 || c[0] == WRITE_6) {
1849 c[8] = c[4];
1850 c[5] = c[3];
1851 c[4] = c[2];
1852 c[3] = c[1] & 0x1f;
1853 c[2] = 0;
1854 c[1] &= 0xe0;
1855 c[0] += (READ_10 - READ_6);
1856 rq->cmd_len = 10;
1857 return BLKPREP_OK;
1858 }
1859
1860 /*
1861 * it's silly to pretend we understand 6-byte sense commands, just
1862 * reject with ILLEGAL_REQUEST and the caller should take the
1863 * appropriate action
1864 */
1865 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1866 rq->errors = ILLEGAL_REQUEST;
1867 return BLKPREP_KILL;
1868 }
1869
1870 return BLKPREP_OK;
1871 }
1872
1873 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1874 {
1875 if (blk_fs_request(rq))
1876 return ide_cdrom_prep_fs(q, rq);
1877 else if (blk_pc_request(rq))
1878 return ide_cdrom_prep_pc(rq);
1879
1880 return 0;
1881 }
1882
1883 struct cd_list_entry {
1884 const char *id_model;
1885 const char *id_firmware;
1886 unsigned int cd_flags;
1887 };
1888
1889 #ifdef CONFIG_IDE_PROC_FS
1890 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1891 {
1892 unsigned long capacity, sectors_per_frame;
1893
1894 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1895 return 0;
1896
1897 return capacity * sectors_per_frame;
1898 }
1899
1900 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1901 int count, int *eof, void *data)
1902 {
1903 ide_drive_t *drive = data;
1904 int len;
1905
1906 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1907 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1908 }
1909
1910 static ide_proc_entry_t idecd_proc[] = {
1911 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1912 { NULL, 0, NULL, NULL }
1913 };
1914
1915 ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
1916
1917 static const struct ide_proc_devset idecd_settings[] = {
1918 IDE_PROC_DEVSET(dsc_overlap, 0, 1),
1919 { 0 },
1920 };
1921
1922 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1923 {
1924 return idecd_proc;
1925 }
1926
1927 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1928 {
1929 return idecd_settings;
1930 }
1931 #endif
1932
1933 static const struct cd_list_entry ide_cd_quirks_list[] = {
1934 /* Limit transfer size per interrupt. */
1935 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1936 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1937 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1938 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1939 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1940 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1941 IDE_AFLAG_PRE_ATAPI12, },
1942 /* Vertos 300, some versions of this drive like to talk BCD. */
1943 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1944 /* Vertos 600 ESD. */
1945 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1946 /*
1947 * Sanyo 3 CD changer uses a non-standard command for CD changing
1948 * (by default standard ATAPI support for CD changers is used).
1949 */
1950 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1951 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1952 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1953 /* Stingray 8X CD-ROM. */
1954 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1955 /*
1956 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1957 * mode sense page capabilities size, but older drives break.
1958 */
1959 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1960 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1961 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1962 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1963 /*
1964 * Some drives used by Apple don't advertise audio play
1965 * but they do support reading TOC & audio datas.
1966 */
1967 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1968 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1969 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1970 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1971 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1972 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1973 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1974 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1975 { NULL, NULL, 0 }
1976 };
1977
1978 static unsigned int ide_cd_flags(u16 *id)
1979 {
1980 const struct cd_list_entry *cle = ide_cd_quirks_list;
1981
1982 while (cle->id_model) {
1983 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1984 (cle->id_firmware == NULL ||
1985 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1986 return cle->cd_flags;
1987 cle++;
1988 }
1989
1990 return 0;
1991 }
1992
1993 static int ide_cdrom_setup(ide_drive_t *drive)
1994 {
1995 struct cdrom_info *cd = drive->driver_data;
1996 struct cdrom_device_info *cdi = &cd->devinfo;
1997 u16 *id = drive->id;
1998 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1999 int nslots;
2000
2001 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
2002
2003 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
2004 blk_queue_dma_alignment(drive->queue, 31);
2005 blk_queue_update_dma_pad(drive->queue, 15);
2006 drive->queue->unplug_delay = (1 * HZ) / 1000;
2007 if (!drive->queue->unplug_delay)
2008 drive->queue->unplug_delay = 1;
2009
2010 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
2011 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
2012
2013 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
2014 fw_rev[4] == '1' && fw_rev[6] <= '2')
2015 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
2016 IDE_AFLAG_TOCADDR_AS_BCD);
2017 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
2018 fw_rev[4] == '1' && fw_rev[6] <= '2')
2019 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
2020 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
2021 /* 3 => use CD in slot 0 */
2022 cdi->sanyo_slot = 3;
2023
2024 nslots = ide_cdrom_probe_capabilities(drive);
2025
2026 /* set correct block size */
2027 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
2028
2029 if (drive->next != drive)
2030 drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
2031 else
2032 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
2033
2034 if (ide_cdrom_register(drive, nslots)) {
2035 printk(KERN_ERR PFX "%s: %s failed to register device with the"
2036 " cdrom driver.\n", drive->name, __func__);
2037 cd->devinfo.handle = NULL;
2038 return 1;
2039 }
2040
2041 ide_proc_register_driver(drive, cd->driver);
2042 return 0;
2043 }
2044
2045 static void ide_cd_remove(ide_drive_t *drive)
2046 {
2047 struct cdrom_info *info = drive->driver_data;
2048
2049 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
2050
2051 ide_proc_unregister_driver(drive, info->driver);
2052
2053 del_gendisk(info->disk);
2054
2055 ide_cd_put(info);
2056 }
2057
2058 static void ide_cd_release(struct kref *kref)
2059 {
2060 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
2061 struct cdrom_device_info *devinfo = &info->devinfo;
2062 ide_drive_t *drive = info->drive;
2063 struct gendisk *g = info->disk;
2064
2065 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
2066
2067 kfree(info->toc);
2068 if (devinfo->handle == drive)
2069 unregister_cdrom(devinfo);
2070 drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
2071 drive->driver_data = NULL;
2072 blk_queue_prep_rq(drive->queue, NULL);
2073 g->private_data = NULL;
2074 put_disk(g);
2075 kfree(info);
2076 }
2077
2078 static int ide_cd_probe(ide_drive_t *);
2079
2080 static ide_driver_t ide_cdrom_driver = {
2081 .gen_driver = {
2082 .owner = THIS_MODULE,
2083 .name = "ide-cdrom",
2084 .bus = &ide_bus_type,
2085 },
2086 .probe = ide_cd_probe,
2087 .remove = ide_cd_remove,
2088 .version = IDECD_VERSION,
2089 .do_request = ide_cd_do_request,
2090 .end_request = ide_end_request,
2091 .error = __ide_error,
2092 #ifdef CONFIG_IDE_PROC_FS
2093 .proc_entries = ide_cd_proc_entries,
2094 .proc_devsets = ide_cd_proc_devsets,
2095 #endif
2096 };
2097
2098 static int idecd_open(struct block_device *bdev, fmode_t mode)
2099 {
2100 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
2101 int rc = -ENOMEM;
2102
2103 if (!info)
2104 return -ENXIO;
2105
2106 rc = cdrom_open(&info->devinfo, bdev, mode);
2107
2108 if (rc < 0)
2109 ide_cd_put(info);
2110
2111 return rc;
2112 }
2113
2114 static int idecd_release(struct gendisk *disk, fmode_t mode)
2115 {
2116 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2117
2118 cdrom_release(&info->devinfo, mode);
2119
2120 ide_cd_put(info);
2121
2122 return 0;
2123 }
2124
2125 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2126 {
2127 struct packet_command cgc;
2128 char buffer[16];
2129 int stat;
2130 char spindown;
2131
2132 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2133 return -EFAULT;
2134
2135 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2136
2137 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2138 if (stat)
2139 return stat;
2140
2141 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2142 return cdrom_mode_select(cdi, &cgc);
2143 }
2144
2145 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2146 {
2147 struct packet_command cgc;
2148 char buffer[16];
2149 int stat;
2150 char spindown;
2151
2152 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2153
2154 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2155 if (stat)
2156 return stat;
2157
2158 spindown = buffer[11] & 0x0f;
2159 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2160 return -EFAULT;
2161 return 0;
2162 }
2163
2164 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2165 unsigned int cmd, unsigned long arg)
2166 {
2167 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2168 int err;
2169
2170 switch (cmd) {
2171 case CDROMSETSPINDOWN:
2172 return idecd_set_spindown(&info->devinfo, arg);
2173 case CDROMGETSPINDOWN:
2174 return idecd_get_spindown(&info->devinfo, arg);
2175 default:
2176 break;
2177 }
2178
2179 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2180 if (err == -EINVAL)
2181 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2182
2183 return err;
2184 }
2185
2186 static int idecd_media_changed(struct gendisk *disk)
2187 {
2188 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2189 return cdrom_media_changed(&info->devinfo);
2190 }
2191
2192 static int idecd_revalidate_disk(struct gendisk *disk)
2193 {
2194 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2195 struct request_sense sense;
2196
2197 ide_cd_read_toc(info->drive, &sense);
2198
2199 return 0;
2200 }
2201
2202 static struct block_device_operations idecd_ops = {
2203 .owner = THIS_MODULE,
2204 .open = idecd_open,
2205 .release = idecd_release,
2206 .locked_ioctl = idecd_ioctl,
2207 .media_changed = idecd_media_changed,
2208 .revalidate_disk = idecd_revalidate_disk
2209 };
2210
2211 /* module options */
2212 static char *ignore;
2213 module_param(ignore, charp, 0400);
2214
2215 static unsigned long debug_mask;
2216 module_param(debug_mask, ulong, 0644);
2217
2218 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2219
2220 static int ide_cd_probe(ide_drive_t *drive)
2221 {
2222 struct cdrom_info *info;
2223 struct gendisk *g;
2224 struct request_sense sense;
2225
2226 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2227 "drive->media: 0x%x\n", __func__, drive->driver_req,
2228 drive->media);
2229
2230 if (!strstr("ide-cdrom", drive->driver_req))
2231 goto failed;
2232
2233 if (drive->media != ide_cdrom && drive->media != ide_optical)
2234 goto failed;
2235
2236 /* skip drives that we were told to ignore */
2237 if (ignore != NULL) {
2238 if (strstr(ignore, drive->name)) {
2239 printk(KERN_INFO PFX "ignoring drive %s\n",
2240 drive->name);
2241 goto failed;
2242 }
2243 }
2244
2245 drive->debug_mask = debug_mask;
2246
2247 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2248 if (info == NULL) {
2249 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2250 drive->name);
2251 goto failed;
2252 }
2253
2254 g = alloc_disk(1 << PARTN_BITS);
2255 if (!g)
2256 goto out_free_cd;
2257
2258 ide_init_disk(g, drive);
2259
2260 kref_init(&info->kref);
2261
2262 info->drive = drive;
2263 info->driver = &ide_cdrom_driver;
2264 info->disk = g;
2265
2266 g->private_data = &info->driver;
2267
2268 drive->driver_data = info;
2269
2270 g->minors = 1;
2271 g->driverfs_dev = &drive->gendev;
2272 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2273 if (ide_cdrom_setup(drive)) {
2274 ide_cd_release(&info->kref);
2275 goto failed;
2276 }
2277
2278 ide_cd_read_toc(drive, &sense);
2279 g->fops = &idecd_ops;
2280 g->flags |= GENHD_FL_REMOVABLE;
2281 add_disk(g);
2282 return 0;
2283
2284 out_free_cd:
2285 kfree(info);
2286 failed:
2287 return -ENODEV;
2288 }
2289
2290 static void __exit ide_cdrom_exit(void)
2291 {
2292 driver_unregister(&ide_cdrom_driver.gen_driver);
2293 }
2294
2295 static int __init ide_cdrom_init(void)
2296 {
2297 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2298 return driver_register(&ide_cdrom_driver.gen_driver);
2299 }
2300
2301 MODULE_ALIAS("ide:*m-cdrom*");
2302 MODULE_ALIAS("ide-cd");
2303 module_init(ide_cdrom_init);
2304 module_exit(ide_cdrom_exit);
2305 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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