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