?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ide-cd: remove dead dsc_overlap setting
[linux-2.6/libata-dev.git] / drivers / ide / ide-cd.c
blob5daa4dd1b018a51e8b7dc73067edea997230a9e7
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
266 if (failed) {
267 if (failed->sense) {
268 sense = failed->sense;
269 failed->sense_len = rq->sense_len;
270 }
271 cdrom_analyze_sense_data(drive, failed, sense);
272 /*
273 * now end the failed request
274 */
275 if (blk_fs_request(failed)) {
276 if (ide_end_dequeued_request(drive, failed, 0,
277 failed->hard_nr_sectors))
278 BUG();
279 } else {
280 if (blk_end_request(failed, -EIO,
281 failed->data_len))
282 BUG();
283 }
284 } else
285 cdrom_analyze_sense_data(drive, NULL, sense);
286 }
287
288 if (!rq->current_nr_sectors && blk_fs_request(rq))
289 uptodate = 1;
290 /* make sure it's fully ended */
291 if (blk_pc_request(rq))
292 nsectors = (rq->data_len + 511) >> 9;
293 if (!nsectors)
294 nsectors = 1;
295
296 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
297 __func__, uptodate, nsectors);
298
299 ide_end_request(drive, uptodate, nsectors);
300 }
301
302 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
303 {
304 if (st & 0x80)
305 return;
306 ide_dump_status(drive, msg, st);
307 }
308
309 /*
310 * Returns:
311 * 0: if the request should be continued.
312 * 1: if the request was ended.
313 */
314 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
315 {
316 ide_hwif_t *hwif = drive->hwif;
317 ide_hwgroup_t *hwgroup = hwif->hwgroup;
318 struct request *rq = hwgroup->rq;
319 int stat, err, sense_key;
320
321 /* check for errors */
322 stat = hwif->tp_ops->read_status(hwif);
323
324 if (stat_ret)
325 *stat_ret = stat;
326
327 if (OK_STAT(stat, good_stat, BAD_R_STAT))
328 return 0;
329
330 /* get the IDE error register */
331 err = ide_read_error(drive);
332 sense_key = err >> 4;
333
334 if (rq == NULL) {
335 printk(KERN_ERR PFX "%s: missing rq in %s\n",
336 drive->name, __func__);
337 return 1;
338 }
339
340 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
341 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
342 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
343
344 if (blk_sense_request(rq)) {
345 /*
346 * We got an error trying to get sense info from the drive
347 * (probably while trying to recover from a former error).
348 * Just give up.
349 */
350 rq->cmd_flags |= REQ_FAILED;
351 cdrom_end_request(drive, 0);
352 ide_error(drive, "request sense failure", stat);
353 return 1;
354
355 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
356 /* All other functions, except for READ. */
357
358 /*
359 * if we have an error, pass back CHECK_CONDITION as the
360 * scsi status byte
361 */
362 if (blk_pc_request(rq) && !rq->errors)
363 rq->errors = SAM_STAT_CHECK_CONDITION;
364
365 /* check for tray open */
366 if (sense_key == NOT_READY) {
367 cdrom_saw_media_change(drive);
368 } else if (sense_key == UNIT_ATTENTION) {
369 /* check for media change */
370 cdrom_saw_media_change(drive);
371 return 0;
372 } else if (sense_key == ILLEGAL_REQUEST &&
373 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
374 /*
375 * Don't print error message for this condition--
376 * SFF8090i indicates that 5/24/00 is the correct
377 * response to a request to close the tray if the
378 * drive doesn't have that capability.
379 * cdrom_log_sense() knows this!
380 */
381 } else if (!(rq->cmd_flags & REQ_QUIET)) {
382 /* otherwise, print an error */
383 ide_dump_status(drive, "packet command error", stat);
384 }
385
386 rq->cmd_flags |= REQ_FAILED;
387
388 /*
389 * instead of playing games with moving completions around,
390 * remove failed request completely and end it when the
391 * request sense has completed
392 */
393 goto end_request;
394
395 } else if (blk_fs_request(rq)) {
396 int do_end_request = 0;
397
398 /* handle errors from READ and WRITE requests */
399
400 if (blk_noretry_request(rq))
401 do_end_request = 1;
402
403 if (sense_key == NOT_READY) {
404 /* tray open */
405 if (rq_data_dir(rq) == READ) {
406 cdrom_saw_media_change(drive);
407
408 /* fail the request */
409 printk(KERN_ERR PFX "%s: tray open\n",
410 drive->name);
411 do_end_request = 1;
412 } else {
413 struct cdrom_info *info = drive->driver_data;
414
415 /*
416 * Allow the drive 5 seconds to recover, some
417 * devices will return this error while flushing
418 * data from cache.
419 */
420 if (!rq->errors)
421 info->write_timeout = jiffies +
422 ATAPI_WAIT_WRITE_BUSY;
423 rq->errors = 1;
424 if (time_after(jiffies, info->write_timeout))
425 do_end_request = 1;
426 else {
427 struct request_queue *q = drive->queue;
428 unsigned long flags;
429
430 /*
431 * take a breather relying on the unplug
432 * timer to kick us again
433 */
434 spin_lock_irqsave(q->queue_lock, flags);
435 blk_plug_device(q);
436 spin_unlock_irqrestore(q->queue_lock, flags);
437
438 return 1;
439 }
440 }
441 } else if (sense_key == UNIT_ATTENTION) {
442 /* media change */
443 cdrom_saw_media_change(drive);
444
445 /*
446 * Arrange to retry the request but be sure to give up
447 * if we've retried too many times.
448 */
449 if (++rq->errors > ERROR_MAX)
450 do_end_request = 1;
451 } else if (sense_key == ILLEGAL_REQUEST ||
452 sense_key == DATA_PROTECT) {
453 /*
454 * No point in retrying after an illegal request or data
455 * protect error.
456 */
457 ide_dump_status_no_sense(drive, "command error", stat);
458 do_end_request = 1;
459 } else if (sense_key == MEDIUM_ERROR) {
460 /*
461 * No point in re-trying a zillion times on a bad
462 * sector. If we got here the error is not correctable.
463 */
464 ide_dump_status_no_sense(drive,
465 "media error (bad sector)",
466 stat);
467 do_end_request = 1;
468 } else if (sense_key == BLANK_CHECK) {
469 /* disk appears blank ?? */
470 ide_dump_status_no_sense(drive, "media error (blank)",
471 stat);
472 do_end_request = 1;
473 } else if ((err & ~ATA_ABORTED) != 0) {
474 /* go to the default handler for other errors */
475 ide_error(drive, "cdrom_decode_status", stat);
476 return 1;
477 } else if ((++rq->errors > ERROR_MAX)) {
478 /* we've racked up too many retries, abort */
479 do_end_request = 1;
480 }
481
482 /*
483 * End a request through request sense analysis when we have
484 * sense data. We need this in order to perform end of media
485 * processing.
486 */
487 if (do_end_request)
488 goto end_request;
489
490 /*
491 * If we got a CHECK_CONDITION status, queue
492 * a request sense command.
493 */
494 if (stat & ATA_ERR)
495 cdrom_queue_request_sense(drive, NULL, NULL);
496 } else {
497 blk_dump_rq_flags(rq, PFX "bad rq");
498 cdrom_end_request(drive, 0);
499 }
500
501 /* retry, or handle the next request */
502 return 1;
503
504 end_request:
505 if (stat & ATA_ERR) {
506 struct request_queue *q = drive->queue;
507 unsigned long flags;
508
509 spin_lock_irqsave(q->queue_lock, flags);
510 blkdev_dequeue_request(rq);
511 spin_unlock_irqrestore(q->queue_lock, flags);
512
513 hwgroup->rq = NULL;
514
515 cdrom_queue_request_sense(drive, rq->sense, rq);
516 } else
517 cdrom_end_request(drive, 0);
518
519 return 1;
520 }
521
522 static int cdrom_timer_expiry(ide_drive_t *drive)
523 {
524 struct request *rq = HWGROUP(drive)->rq;
525 unsigned long wait = 0;
526
527 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__,
528 rq->cmd[0]);
529
530 /*
531 * Some commands are *slow* and normally take a long time to complete.
532 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
533 * commands/drives support that. Let ide_timer_expiry keep polling us
534 * for these.
535 */
536 switch (rq->cmd[0]) {
537 case GPCMD_BLANK:
538 case GPCMD_FORMAT_UNIT:
539 case GPCMD_RESERVE_RZONE_TRACK:
540 case GPCMD_CLOSE_TRACK:
541 case GPCMD_FLUSH_CACHE:
542 wait = ATAPI_WAIT_PC;
543 break;
544 default:
545 if (!(rq->cmd_flags & REQ_QUIET))
546 printk(KERN_INFO PFX "cmd 0x%x timed out\n",
547 rq->cmd[0]);
548 wait = 0;
549 break;
550 }
551 return wait;
552 }
553
554 /*
555 * Set up the device registers for transferring a packet command on DEV,
556 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
557 * which actually transfers the command to the drive. If this is a
558 * drq_interrupt device, this routine will arrange for HANDLER to be
559 * called when the interrupt from the drive arrives. Otherwise, HANDLER
560 * will be called immediately after the drive is prepared for the transfer.
561 */
562 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
563 int xferlen,
564 ide_handler_t *handler)
565 {
566 ide_hwif_t *hwif = drive->hwif;
567
568 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
569
570 /* FIXME: for Virtual DMA we must check harder */
571 if (drive->dma)
572 drive->dma = !hwif->dma_ops->dma_setup(drive);
573
574 /* set up the controller registers */
575 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
576 xferlen, drive->dma);
577
578 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
579 /* waiting for CDB interrupt, not DMA yet. */
580 if (drive->dma)
581 drive->waiting_for_dma = 0;
582
583 /* packet command */
584 ide_execute_command(drive, ATA_CMD_PACKET, handler,
585 ATAPI_WAIT_PC, cdrom_timer_expiry);
586 return ide_started;
587 } else {
588 ide_execute_pkt_cmd(drive);
589
590 return (*handler) (drive);
591 }
592 }
593
594 /*
595 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
596 * registers must have already been prepared by cdrom_start_packet_command.
597 * HANDLER is the interrupt handler to call when the command completes or
598 * there's data ready.
599 */
600 #define ATAPI_MIN_CDB_BYTES 12
601 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
602 struct request *rq,
603 ide_handler_t *handler)
604 {
605 ide_hwif_t *hwif = drive->hwif;
606 int cmd_len;
607 ide_startstop_t startstop;
608
609 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
610
611 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
612 /*
613 * Here we should have been called after receiving an interrupt
614 * from the device. DRQ should how be set.
615 */
616
617 /* check for errors */
618 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
619 return ide_stopped;
620
621 /* ok, next interrupt will be DMA interrupt */
622 if (drive->dma)
623 drive->waiting_for_dma = 1;
624 } else {
625 /* otherwise, we must wait for DRQ to get set */
626 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
627 ATA_BUSY, WAIT_READY))
628 return startstop;
629 }
630
631 /* arm the interrupt handler */
632 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
633
634 /* ATAPI commands get padded out to 12 bytes minimum */
635 cmd_len = COMMAND_SIZE(rq->cmd[0]);
636 if (cmd_len < ATAPI_MIN_CDB_BYTES)
637 cmd_len = ATAPI_MIN_CDB_BYTES;
638
639 /* send the command to the device */
640 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
641
642 /* start the DMA if need be */
643 if (drive->dma)
644 hwif->dma_ops->dma_start(drive);
645
646 return ide_started;
647 }
648
649 /*
650 * Check the contents of the interrupt reason register from the cdrom
651 * and attempt to recover if there are problems. Returns 0 if everything's
652 * ok; nonzero if the request has been terminated.
653 */
654 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
655 int len, int ireason, int rw)
656 {
657 ide_hwif_t *hwif = drive->hwif;
658
659 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
660 __func__, ireason, rw);
661
662 /*
663 * ireason == 0: the drive wants to receive data from us
664 * ireason == 2: the drive is expecting to transfer data to us
665 */
666 if (ireason == (!rw << 1))
667 return 0;
668 else if (ireason == (rw << 1)) {
669
670 /* whoops... */
671 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
672 drive->name, __func__);
673
674 ide_pad_transfer(drive, rw, len);
675 } else if (rw == 0 && ireason == 1) {
676 /*
677 * Some drives (ASUS) seem to tell us that status info is
678 * available. Just get it and ignore.
679 */
680 (void)hwif->tp_ops->read_status(hwif);
681 return 0;
682 } else {
683 /* drive wants a command packet, or invalid ireason... */
684 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
685 drive->name, __func__, ireason);
686 }
687
688 if (rq->cmd_type == REQ_TYPE_ATA_PC)
689 rq->cmd_flags |= REQ_FAILED;
690
691 cdrom_end_request(drive, 0);
692 return -1;
693 }
694
695 /*
696 * Assume that the drive will always provide data in multiples of at least
697 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
698 */
699 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
700 {
701 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
702
703 if ((len % SECTOR_SIZE) == 0)
704 return 0;
705
706 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
707 __func__, len);
708
709 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
710 printk(KERN_ERR PFX "This drive is not supported by this "
711 "version of the driver\n");
712 else {
713 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
714 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
715 }
716
717 return 1;
718 }
719
720 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
721
722 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
723 struct request *rq)
724 {
725 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
726 rq->cmd_flags);
727
728 if (rq_data_dir(rq) == READ) {
729 unsigned short sectors_per_frame =
730 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
731 int nskip = rq->sector & (sectors_per_frame - 1);
732
733 /*
734 * If the requested sector doesn't start on a frame boundary,
735 * we must adjust the start of the transfer so that it does,
736 * and remember to skip the first few sectors.
737 *
738 * If the rq->current_nr_sectors field is larger than the size
739 * of the buffer, it will mean that we're to skip a number of
740 * sectors equal to the amount by which rq->current_nr_sectors
741 * is larger than the buffer size.
742 */
743 if (nskip > 0) {
744 /* sanity check... */
745 if (rq->current_nr_sectors !=
746 bio_cur_sectors(rq->bio)) {
747 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
748 drive->name, __func__,
749 rq->current_nr_sectors);
750 cdrom_end_request(drive, 0);
751 return ide_stopped;
752 }
753 rq->current_nr_sectors += nskip;
754 }
755 }
756
757 /* set up the command */
758 rq->timeout = ATAPI_WAIT_PC;
759
760 return ide_started;
761 }
762
763 /*
764 * Routine to send a read/write packet command to the drive. This is usually
765 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
766 * devices, it is called from an interrupt when the drive is ready to accept
767 * the command.
768 */
769 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
770 {
771 struct request *rq = drive->hwif->hwgroup->rq;
772
773 /* send the command to the drive and return */
774 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
775 }
776
777 /*
778 * Fix up a possibly partially-processed request so that we can start it over
779 * entirely, or even put it back on the request queue.
780 */
781 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
782 {
783
784 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
785
786 if (rq->buffer != bio_data(rq->bio)) {
787 sector_t n =
788 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
789
790 rq->buffer = bio_data(rq->bio);
791 rq->nr_sectors += n;
792 rq->sector -= n;
793 }
794 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
795 rq->hard_cur_sectors = rq->current_nr_sectors;
796 rq->hard_nr_sectors = rq->nr_sectors;
797 rq->hard_sector = rq->sector;
798 rq->q->prep_rq_fn(rq->q, rq);
799 }
800
801 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
802 {
803 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
804 __func__, rq->cmd[0]);
805
806 /*
807 * Some of the trailing request sense fields are optional,
808 * and some drives don't send them. Sigh.
809 */
810 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
811 rq->data_len > 0 && rq->data_len <= 5)
812 while (rq->data_len > 0) {
813 *(u8 *)rq->data++ = 0;
814 --rq->data_len;
815 }
816 }
817
818 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
819 int write, void *buffer, unsigned *bufflen,
820 struct request_sense *sense, int timeout,
821 unsigned int cmd_flags)
822 {
823 struct cdrom_info *info = drive->driver_data;
824 struct request_sense local_sense;
825 int retries = 10;
826 unsigned int flags = 0;
827
828 if (!sense)
829 sense = &local_sense;
830
831 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
832 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
833 timeout, cmd_flags);
834
835 /* start of retry loop */
836 do {
837 struct request *rq;
838 int error;
839
840 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
841
842 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
843 rq->cmd_type = REQ_TYPE_ATA_PC;
844 rq->sense = sense;
845 rq->cmd_flags |= cmd_flags;
846 rq->timeout = timeout;
847 if (buffer) {
848 rq->data = buffer;
849 rq->data_len = *bufflen;
850 }
851
852 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
853
854 if (buffer)
855 *bufflen = rq->data_len;
856
857 flags = rq->cmd_flags;
858 blk_put_request(rq);
859
860 /*
861 * FIXME: we should probably abort/retry or something in case of
862 * failure.
863 */
864 if (flags & REQ_FAILED) {
865 /*
866 * The request failed. Retry if it was due to a unit
867 * attention status (usually means media was changed).
868 */
869 struct request_sense *reqbuf = sense;
870
871 if (reqbuf->sense_key == UNIT_ATTENTION)
872 cdrom_saw_media_change(drive);
873 else if (reqbuf->sense_key == NOT_READY &&
874 reqbuf->asc == 4 && reqbuf->ascq != 4) {
875 /*
876 * The drive is in the process of loading
877 * a disk. Retry, but wait a little to give
878 * the drive time to complete the load.
879 */
880 ssleep(2);
881 } else {
882 /* otherwise, don't retry */
883 retries = 0;
884 }
885 --retries;
886 }
887
888 /* end of retry loop */
889 } while ((flags & REQ_FAILED) && retries >= 0);
890
891 /* return an error if the command failed */
892 return (flags & REQ_FAILED) ? -EIO : 0;
893 }
894
895 /*
896 * Called from blk_end_request_callback() after the data of the request is
897 * completed and before the request itself is completed. By returning value '1',
898 * blk_end_request_callback() returns immediately without completing it.
899 */
900 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
901 {
902 return 1;
903 }
904
905 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
906 {
907 ide_hwif_t *hwif = drive->hwif;
908 ide_hwgroup_t *hwgroup = hwif->hwgroup;
909 struct request *rq = hwgroup->rq;
910 xfer_func_t *xferfunc;
911 ide_expiry_t *expiry = NULL;
912 int dma_error = 0, dma, stat, thislen, uptodate = 0;
913 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
914 unsigned int timeout;
915 u16 len;
916 u8 ireason;
917
918 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
919 __func__, rq->cmd[0], write);
920
921 /* check for errors */
922 dma = drive->dma;
923 if (dma) {
924 drive->dma = 0;
925 dma_error = hwif->dma_ops->dma_end(drive);
926 if (dma_error) {
927 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
928 write ? "write" : "read");
929 ide_dma_off(drive);
930 }
931 }
932
933 if (cdrom_decode_status(drive, 0, &stat))
934 return ide_stopped;
935
936 /* using dma, transfer is complete now */
937 if (dma) {
938 if (dma_error)
939 return ide_error(drive, "dma error", stat);
940 if (blk_fs_request(rq)) {
941 ide_end_request(drive, 1, rq->nr_sectors);
942 return ide_stopped;
943 }
944 goto end_request;
945 }
946
947 ide_read_bcount_and_ireason(drive, &len, &ireason);
948
949 thislen = blk_fs_request(rq) ? len : rq->data_len;
950 if (thislen > len)
951 thislen = len;
952
953 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
954 __func__, stat, thislen);
955
956 /* If DRQ is clear, the command has completed. */
957 if ((stat & ATA_DRQ) == 0) {
958 if (blk_fs_request(rq)) {
959 /*
960 * If we're not done reading/writing, complain.
961 * Otherwise, complete the command normally.
962 */
963 uptodate = 1;
964 if (rq->current_nr_sectors > 0) {
965 printk(KERN_ERR PFX "%s: %s: data underrun "
966 "(%d blocks)\n",
967 drive->name, __func__,
968 rq->current_nr_sectors);
969 if (!write)
970 rq->cmd_flags |= REQ_FAILED;
971 uptodate = 0;
972 }
973 cdrom_end_request(drive, uptodate);
974 return ide_stopped;
975 } else if (!blk_pc_request(rq)) {
976 ide_cd_request_sense_fixup(drive, rq);
977 /* complain if we still have data left to transfer */
978 uptodate = rq->data_len ? 0 : 1;
979 }
980 goto end_request;
981 }
982
983 /* check which way to transfer data */
984 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
985 return ide_stopped;
986
987 if (blk_fs_request(rq)) {
988 if (write == 0) {
989 int nskip;
990
991 if (ide_cd_check_transfer_size(drive, len)) {
992 cdrom_end_request(drive, 0);
993 return ide_stopped;
994 }
995
996 /*
997 * First, figure out if we need to bit-bucket
998 * any of the leading sectors.
999 */
1000 nskip = min_t(int, rq->current_nr_sectors
1001 - bio_cur_sectors(rq->bio),
1002 thislen >> 9);
1003 if (nskip > 0) {
1004 ide_pad_transfer(drive, write, nskip << 9);
1005 rq->current_nr_sectors -= nskip;
1006 thislen -= (nskip << 9);
1007 }
1008 }
1009 }
1010
1011 if (ireason == 0) {
1012 write = 1;
1013 xferfunc = hwif->tp_ops->output_data;
1014 } else {
1015 write = 0;
1016 xferfunc = hwif->tp_ops->input_data;
1017 }
1018
1019 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
1020 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
1021
1022 /* transfer data */
1023 while (thislen > 0) {
1024 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1025 int blen = rq->data_len;
1026
1027 /* bio backed? */
1028 if (rq->bio) {
1029 if (blk_fs_request(rq)) {
1030 ptr = rq->buffer;
1031 blen = rq->current_nr_sectors << 9;
1032 } else {
1033 ptr = bio_data(rq->bio);
1034 blen = bio_iovec(rq->bio)->bv_len;
1035 }
1036 }
1037
1038 if (!ptr) {
1039 if (blk_fs_request(rq) && !write)
1040 /*
1041 * If the buffers are full, pipe the rest into
1042 * oblivion.
1043 */
1044 ide_pad_transfer(drive, 0, thislen);
1045 else {
1046 printk(KERN_ERR PFX "%s: confused, missing data\n",
1047 drive->name);
1048 blk_dump_rq_flags(rq, rq_data_dir(rq)
1049 ? "cdrom_newpc_intr, write"
1050 : "cdrom_newpc_intr, read");
1051 }
1052 break;
1053 }
1054
1055 if (blen > thislen)
1056 blen = thislen;
1057
1058 xferfunc(drive, NULL, ptr, blen);
1059
1060 thislen -= blen;
1061 len -= blen;
1062
1063 if (blk_fs_request(rq)) {
1064 rq->buffer += blen;
1065 rq->nr_sectors -= (blen >> 9);
1066 rq->current_nr_sectors -= (blen >> 9);
1067 rq->sector += (blen >> 9);
1068
1069 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1070 cdrom_end_request(drive, 1);
1071 } else {
1072 rq->data_len -= blen;
1073
1074 /*
1075 * The request can't be completed until DRQ is cleared.
1076 * So complete the data, but don't complete the request
1077 * using the dummy function for the callback feature
1078 * of blk_end_request_callback().
1079 */
1080 if (rq->bio)
1081 blk_end_request_callback(rq, 0, blen,
1082 cdrom_newpc_intr_dummy_cb);
1083 else
1084 rq->data += blen;
1085 }
1086 if (!write && blk_sense_request(rq))
1087 rq->sense_len += blen;
1088 }
1089
1090 /* pad, if necessary */
1091 if (!blk_fs_request(rq) && len > 0)
1092 ide_pad_transfer(drive, write, len);
1093
1094 if (blk_pc_request(rq)) {
1095 timeout = rq->timeout;
1096 } else {
1097 timeout = ATAPI_WAIT_PC;
1098 if (!blk_fs_request(rq))
1099 expiry = cdrom_timer_expiry;
1100 }
1101
1102 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1103 return ide_started;
1104
1105 end_request:
1106 if (blk_pc_request(rq)) {
1107 unsigned int dlen = rq->data_len;
1108
1109 if (dma)
1110 rq->data_len = 0;
1111
1112 if (blk_end_request(rq, 0, dlen))
1113 BUG();
1114
1115 hwgroup->rq = NULL;
1116 } else {
1117 if (!uptodate)
1118 rq->cmd_flags |= REQ_FAILED;
1119 cdrom_end_request(drive, uptodate);
1120 }
1121 return ide_stopped;
1122 }
1123
1124 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1125 {
1126 struct cdrom_info *cd = drive->driver_data;
1127 int write = rq_data_dir(rq) == WRITE;
1128 unsigned short sectors_per_frame =
1129 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1130
1131 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1132 "secs_per_frame: %u\n",
1133 __func__, rq->cmd[0], write, sectors_per_frame);
1134
1135 if (write) {
1136 /* disk has become write protected */
1137 if (get_disk_ro(cd->disk)) {
1138 cdrom_end_request(drive, 0);
1139 return ide_stopped;
1140 }
1141 } else {
1142 /*
1143 * We may be retrying this request after an error. Fix up any
1144 * weirdness which might be present in the request packet.
1145 */
1146 ide_cd_restore_request(drive, rq);
1147 }
1148
1149 /* use DMA, if possible / writes *must* be hardware frame aligned */
1150 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1151 (rq->sector & (sectors_per_frame - 1))) {
1152 if (write) {
1153 cdrom_end_request(drive, 0);
1154 return ide_stopped;
1155 }
1156 drive->dma = 0;
1157 } else
1158 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1159
1160 if (write)
1161 cd->devinfo.media_written = 1;
1162
1163 return ide_started;
1164 }
1165
1166 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1167 {
1168 struct request *rq = HWGROUP(drive)->rq;
1169
1170 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1171 }
1172
1173 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1174 {
1175
1176 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1177 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1178 rq->cmd_type);
1179
1180 if (blk_pc_request(rq))
1181 rq->cmd_flags |= REQ_QUIET;
1182 else
1183 rq->cmd_flags &= ~REQ_FAILED;
1184
1185 drive->dma = 0;
1186
1187 /* sg request */
1188 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1189 struct request_queue *q = drive->queue;
1190 unsigned int alignment;
1191 char *buf;
1192
1193 if (rq->bio)
1194 buf = bio_data(rq->bio);
1195 else
1196 buf = rq->data;
1197
1198 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1199
1200 /*
1201 * check if dma is safe
1202 *
1203 * NOTE! The "len" and "addr" checks should possibly have
1204 * separate masks.
1205 */
1206 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1207 if ((unsigned long)buf & alignment
1208 || rq->data_len & q->dma_pad_mask
1209 || object_is_on_stack(buf))
1210 drive->dma = 0;
1211 }
1212 }
1213
1214 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1215 sector_t block)
1216 {
1217 ide_handler_t *fn;
1218 int xferlen;
1219
1220 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1221 "rq->cmd_type: 0x%x, block: %llu\n",
1222 __func__, rq->cmd[0], rq->cmd_type,
1223 (unsigned long long)block);
1224
1225 if (blk_fs_request(rq)) {
1226 xferlen = 32768;
1227 fn = cdrom_start_rw_cont;
1228
1229 if (cdrom_start_rw(drive, rq) == ide_stopped)
1230 return ide_stopped;
1231
1232 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1233 return ide_stopped;
1234 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1235 rq->cmd_type == REQ_TYPE_ATA_PC) {
1236 xferlen = rq->data_len;
1237 fn = cdrom_do_newpc_cont;
1238
1239 if (!rq->timeout)
1240 rq->timeout = ATAPI_WAIT_PC;
1241
1242 cdrom_do_block_pc(drive, rq);
1243 } else if (blk_special_request(rq)) {
1244 /* right now this can only be a reset... */
1245 cdrom_end_request(drive, 1);
1246 return ide_stopped;
1247 } else {
1248 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1249 cdrom_end_request(drive, 0);
1250 return ide_stopped;
1251 }
1252
1253 return cdrom_start_packet_command(drive, xferlen, fn);
1254 }
1255
1256 /*
1257 * Ioctl handling.
1258 *
1259 * Routines which queue packet commands take as a final argument a pointer to a
1260 * request_sense struct. If execution of the command results in an error with a
1261 * CHECK CONDITION status, this structure will be filled with the results of the
1262 * subsequent request sense command. The pointer can also be NULL, in which case
1263 * no sense information is returned.
1264 */
1265 static void msf_from_bcd(struct atapi_msf *msf)
1266 {
1267 msf->minute = bcd2bin(msf->minute);
1268 msf->second = bcd2bin(msf->second);
1269 msf->frame = bcd2bin(msf->frame);
1270 }
1271
1272 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1273 {
1274 struct cdrom_info *info = drive->driver_data;
1275 struct cdrom_device_info *cdi = &info->devinfo;
1276 unsigned char cmd[BLK_MAX_CDB];
1277
1278 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1279
1280 memset(cmd, 0, BLK_MAX_CDB);
1281 cmd[0] = GPCMD_TEST_UNIT_READY;
1282
1283 /*
1284 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1285 * instead of supporting the LOAD_UNLOAD opcode.
1286 */
1287 cmd[7] = cdi->sanyo_slot % 3;
1288
1289 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1290 }
1291
1292 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1293 unsigned long *sectors_per_frame,
1294 struct request_sense *sense)
1295 {
1296 struct {
1297 __be32 lba;
1298 __be32 blocklen;
1299 } capbuf;
1300
1301 int stat;
1302 unsigned char cmd[BLK_MAX_CDB];
1303 unsigned len = sizeof(capbuf);
1304 u32 blocklen;
1305
1306 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1307
1308 memset(cmd, 0, BLK_MAX_CDB);
1309 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1310
1311 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1312 REQ_QUIET);
1313 if (stat)
1314 return stat;
1315
1316 /*
1317 * Sanity check the given block size
1318 */
1319 blocklen = be32_to_cpu(capbuf.blocklen);
1320 switch (blocklen) {
1321 case 512:
1322 case 1024:
1323 case 2048:
1324 case 4096:
1325 break;
1326 default:
1327 printk(KERN_ERR PFX "%s: weird block size %u\n",
1328 drive->name, blocklen);
1329 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1330 drive->name);
1331 blocklen = 2048;
1332 break;
1333 }
1334
1335 *capacity = 1 + be32_to_cpu(capbuf.lba);
1336 *sectors_per_frame = blocklen >> SECTOR_BITS;
1337
1338 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1339 __func__, *capacity, *sectors_per_frame);
1340
1341 return 0;
1342 }
1343
1344 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1345 int format, char *buf, int buflen,
1346 struct request_sense *sense)
1347 {
1348 unsigned char cmd[BLK_MAX_CDB];
1349
1350 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1351
1352 memset(cmd, 0, BLK_MAX_CDB);
1353
1354 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1355 cmd[6] = trackno;
1356 cmd[7] = (buflen >> 8);
1357 cmd[8] = (buflen & 0xff);
1358 cmd[9] = (format << 6);
1359
1360 if (msf_flag)
1361 cmd[1] = 2;
1362
1363 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1364 }
1365
1366 /* Try to read the entire TOC for the disk into our internal buffer. */
1367 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1368 {
1369 int stat, ntracks, i;
1370 struct cdrom_info *info = drive->driver_data;
1371 struct cdrom_device_info *cdi = &info->devinfo;
1372 struct atapi_toc *toc = info->toc;
1373 struct {
1374 struct atapi_toc_header hdr;
1375 struct atapi_toc_entry ent;
1376 } ms_tmp;
1377 long last_written;
1378 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1379
1380 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1381
1382 if (toc == NULL) {
1383 /* try to allocate space */
1384 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1385 if (toc == NULL) {
1386 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1387 drive->name);
1388 return -ENOMEM;
1389 }
1390 info->toc = toc;
1391 }
1392
1393 /*
1394 * Check to see if the existing data is still valid. If it is,
1395 * just return.
1396 */
1397 (void) cdrom_check_status(drive, sense);
1398
1399 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1400 return 0;
1401
1402 /* try to get the total cdrom capacity and sector size */
1403 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1404 sense);
1405 if (stat)
1406 toc->capacity = 0x1fffff;
1407
1408 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1409 /* save a private copy of the TOC capacity for error handling */
1410 drive->probed_capacity = toc->capacity * sectors_per_frame;
1411
1412 blk_queue_hardsect_size(drive->queue,
1413 sectors_per_frame << SECTOR_BITS);
1414
1415 /* first read just the header, so we know how long the TOC is */
1416 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1417 sizeof(struct atapi_toc_header), sense);
1418 if (stat)
1419 return stat;
1420
1421 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1422 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1423 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1424 }
1425
1426 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1427 if (ntracks <= 0)
1428 return -EIO;
1429 if (ntracks > MAX_TRACKS)
1430 ntracks = MAX_TRACKS;
1431
1432 /* now read the whole schmeer */
1433 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1434 (char *)&toc->hdr,
1435 sizeof(struct atapi_toc_header) +
1436 (ntracks + 1) *
1437 sizeof(struct atapi_toc_entry), sense);
1438
1439 if (stat && toc->hdr.first_track > 1) {
1440 /*
1441 * Cds with CDI tracks only don't have any TOC entries, despite
1442 * of this the returned values are
1443 * first_track == last_track = number of CDI tracks + 1,
1444 * so that this case is indistinguishable from the same layout
1445 * plus an additional audio track. If we get an error for the
1446 * regular case, we assume a CDI without additional audio
1447 * tracks. In this case the readable TOC is empty (CDI tracks
1448 * are not included) and only holds the Leadout entry.
1449 *
1450 * Heiko Eißfeldt.
1451 */
1452 ntracks = 0;
1453 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1454 (char *)&toc->hdr,
1455 sizeof(struct atapi_toc_header) +
1456 (ntracks + 1) *
1457 sizeof(struct atapi_toc_entry),
1458 sense);
1459 if (stat)
1460 return stat;
1461
1462 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1463 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1464 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1465 } else {
1466 toc->hdr.first_track = CDROM_LEADOUT;
1467 toc->hdr.last_track = CDROM_LEADOUT;
1468 }
1469 }
1470
1471 if (stat)
1472 return stat;
1473
1474 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1475
1476 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1477 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1478 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1479 }
1480
1481 for (i = 0; i <= ntracks; i++) {
1482 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1483 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1484 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1485 msf_from_bcd(&toc->ent[i].addr.msf);
1486 }
1487 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1488 toc->ent[i].addr.msf.second,
1489 toc->ent[i].addr.msf.frame);
1490 }
1491
1492 if (toc->hdr.first_track != CDROM_LEADOUT) {
1493 /* read the multisession information */
1494 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1495 sizeof(ms_tmp), sense);
1496 if (stat)
1497 return stat;
1498
1499 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1500 } else {
1501 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1502 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1503 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1504 }
1505
1506 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1507 /* re-read multisession information using MSF format */
1508 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1509 sizeof(ms_tmp), sense);
1510 if (stat)
1511 return stat;
1512
1513 msf_from_bcd(&ms_tmp.ent.addr.msf);
1514 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1515 ms_tmp.ent.addr.msf.second,
1516 ms_tmp.ent.addr.msf.frame);
1517 }
1518
1519 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1520
1521 /* now try to get the total cdrom capacity */
1522 stat = cdrom_get_last_written(cdi, &last_written);
1523 if (!stat && (last_written > toc->capacity)) {
1524 toc->capacity = last_written;
1525 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1526 drive->probed_capacity = toc->capacity * sectors_per_frame;
1527 }
1528
1529 /* Remember that we've read this stuff. */
1530 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1531
1532 return 0;
1533 }
1534
1535 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1536 {
1537 struct cdrom_info *info = drive->driver_data;
1538 struct cdrom_device_info *cdi = &info->devinfo;
1539 struct packet_command cgc;
1540 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1541
1542 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1543
1544 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1545 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1546
1547 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1548 do {
1549 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1550 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1551 if (!stat)
1552 break;
1553 } while (--attempts);
1554 return stat;
1555 }
1556
1557 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1558 {
1559 struct cdrom_info *cd = drive->driver_data;
1560 u16 curspeed, maxspeed;
1561
1562 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1563
1564 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1565 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1566 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1567 } else {
1568 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1569 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1570 }
1571
1572 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1573 __func__, curspeed, maxspeed);
1574
1575 cd->current_speed = (curspeed + (176/2)) / 176;
1576 cd->max_speed = (maxspeed + (176/2)) / 176;
1577 }
1578
1579 #define IDE_CD_CAPABILITIES \
1580 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1581 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1582 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1583 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1584 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1585
1586 static struct cdrom_device_ops ide_cdrom_dops = {
1587 .open = ide_cdrom_open_real,
1588 .release = ide_cdrom_release_real,
1589 .drive_status = ide_cdrom_drive_status,
1590 .media_changed = ide_cdrom_check_media_change_real,
1591 .tray_move = ide_cdrom_tray_move,
1592 .lock_door = ide_cdrom_lock_door,
1593 .select_speed = ide_cdrom_select_speed,
1594 .get_last_session = ide_cdrom_get_last_session,
1595 .get_mcn = ide_cdrom_get_mcn,
1596 .reset = ide_cdrom_reset,
1597 .audio_ioctl = ide_cdrom_audio_ioctl,
1598 .capability = IDE_CD_CAPABILITIES,
1599 .generic_packet = ide_cdrom_packet,
1600 };
1601
1602 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1603 {
1604 struct cdrom_info *info = drive->driver_data;
1605 struct cdrom_device_info *devinfo = &info->devinfo;
1606
1607 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1608
1609 devinfo->ops = &ide_cdrom_dops;
1610 devinfo->speed = info->current_speed;
1611 devinfo->capacity = nslots;
1612 devinfo->handle = drive;
1613 strcpy(devinfo->name, drive->name);
1614
1615 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1616 devinfo->mask |= CDC_SELECT_SPEED;
1617
1618 devinfo->disk = info->disk;
1619 return register_cdrom(devinfo);
1620 }
1621
1622 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1623 {
1624 struct cdrom_info *cd = drive->driver_data;
1625 struct cdrom_device_info *cdi = &cd->devinfo;
1626 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1627 mechtype_t mechtype;
1628 int nslots = 1;
1629
1630 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1631 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1632 drive->atapi_flags);
1633
1634 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1635 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1636 CDC_MO_DRIVE | CDC_RAM);
1637
1638 if (drive->media == ide_optical) {
1639 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1640 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1641 drive->name);
1642 return nslots;
1643 }
1644
1645 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1646 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1647 cdi->mask &= ~CDC_PLAY_AUDIO;
1648 return nslots;
1649 }
1650
1651 /*
1652 * We have to cheat a little here. the packet will eventually be queued
1653 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1654 * Since this device hasn't been registered with the Uniform layer yet,
1655 * it can't do this. Same goes for cdi->ops.
1656 */
1657 cdi->handle = drive;
1658 cdi->ops = &ide_cdrom_dops;
1659
1660 if (ide_cdrom_get_capabilities(drive, buf))
1661 return 0;
1662
1663 if ((buf[8 + 6] & 0x01) == 0)
1664 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1665 if (buf[8 + 6] & 0x08)
1666 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1667 if (buf[8 + 3] & 0x01)
1668 cdi->mask &= ~CDC_CD_R;
1669 if (buf[8 + 3] & 0x02)
1670 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1671 if (buf[8 + 2] & 0x38)
1672 cdi->mask &= ~CDC_DVD;
1673 if (buf[8 + 3] & 0x20)
1674 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1675 if (buf[8 + 3] & 0x10)
1676 cdi->mask &= ~CDC_DVD_R;
1677 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1678 cdi->mask &= ~CDC_PLAY_AUDIO;
1679
1680 mechtype = buf[8 + 6] >> 5;
1681 if (mechtype == mechtype_caddy ||
1682 mechtype == mechtype_popup ||
1683 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1684 cdi->mask |= CDC_CLOSE_TRAY;
1685
1686 if (cdi->sanyo_slot > 0) {
1687 cdi->mask &= ~CDC_SELECT_DISC;
1688 nslots = 3;
1689 } else if (mechtype == mechtype_individual_changer ||
1690 mechtype == mechtype_cartridge_changer) {
1691 nslots = cdrom_number_of_slots(cdi);
1692 if (nslots > 1)
1693 cdi->mask &= ~CDC_SELECT_DISC;
1694 }
1695
1696 ide_cdrom_update_speed(drive, buf);
1697
1698 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1699
1700 /* don't print speed if the drive reported 0 */
1701 if (cd->max_speed)
1702 printk(KERN_CONT " %dX", cd->max_speed);
1703
1704 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1705
1706 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1707 printk(KERN_CONT " DVD%s%s",
1708 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1709 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1710
1711 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1712 printk(KERN_CONT " CD%s%s",
1713 (cdi->mask & CDC_CD_R) ? "" : "-R",
1714 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1715
1716 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1717 printk(KERN_CONT " changer w/%d slots", nslots);
1718 else
1719 printk(KERN_CONT " drive");
1720
1721 printk(KERN_CONT ", %dkB Cache\n",
1722 be16_to_cpup((__be16 *)&buf[8 + 12]));
1723
1724 return nslots;
1725 }
1726
1727 /* standard prep_rq_fn that builds 10 byte cmds */
1728 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1729 {
1730 int hard_sect = queue_hardsect_size(q);
1731 long block = (long)rq->hard_sector / (hard_sect >> 9);
1732 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1733
1734 memset(rq->cmd, 0, BLK_MAX_CDB);
1735
1736 if (rq_data_dir(rq) == READ)
1737 rq->cmd[0] = GPCMD_READ_10;
1738 else
1739 rq->cmd[0] = GPCMD_WRITE_10;
1740
1741 /*
1742 * fill in lba
1743 */
1744 rq->cmd[2] = (block >> 24) & 0xff;
1745 rq->cmd[3] = (block >> 16) & 0xff;
1746 rq->cmd[4] = (block >> 8) & 0xff;
1747 rq->cmd[5] = block & 0xff;
1748
1749 /*
1750 * and transfer length
1751 */
1752 rq->cmd[7] = (blocks >> 8) & 0xff;
1753 rq->cmd[8] = blocks & 0xff;
1754 rq->cmd_len = 10;
1755 return BLKPREP_OK;
1756 }
1757
1758 /*
1759 * Most of the SCSI commands are supported directly by ATAPI devices.
1760 * This transform handles the few exceptions.
1761 */
1762 static int ide_cdrom_prep_pc(struct request *rq)
1763 {
1764 u8 *c = rq->cmd;
1765
1766 /* transform 6-byte read/write commands to the 10-byte version */
1767 if (c[0] == READ_6 || c[0] == WRITE_6) {
1768 c[8] = c[4];
1769 c[5] = c[3];
1770 c[4] = c[2];
1771 c[3] = c[1] & 0x1f;
1772 c[2] = 0;
1773 c[1] &= 0xe0;
1774 c[0] += (READ_10 - READ_6);
1775 rq->cmd_len = 10;
1776 return BLKPREP_OK;
1777 }
1778
1779 /*
1780 * it's silly to pretend we understand 6-byte sense commands, just
1781 * reject with ILLEGAL_REQUEST and the caller should take the
1782 * appropriate action
1783 */
1784 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1785 rq->errors = ILLEGAL_REQUEST;
1786 return BLKPREP_KILL;
1787 }
1788
1789 return BLKPREP_OK;
1790 }
1791
1792 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1793 {
1794 if (blk_fs_request(rq))
1795 return ide_cdrom_prep_fs(q, rq);
1796 else if (blk_pc_request(rq))
1797 return ide_cdrom_prep_pc(rq);
1798
1799 return 0;
1800 }
1801
1802 struct cd_list_entry {
1803 const char *id_model;
1804 const char *id_firmware;
1805 unsigned int cd_flags;
1806 };
1807
1808 #ifdef CONFIG_IDE_PROC_FS
1809 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1810 {
1811 unsigned long capacity, sectors_per_frame;
1812
1813 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1814 return 0;
1815
1816 return capacity * sectors_per_frame;
1817 }
1818
1819 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1820 int count, int *eof, void *data)
1821 {
1822 ide_drive_t *drive = data;
1823 int len;
1824
1825 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1826 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1827 }
1828
1829 static ide_proc_entry_t idecd_proc[] = {
1830 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1831 { NULL, 0, NULL, NULL }
1832 };
1833
1834 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1835 {
1836 return idecd_proc;
1837 }
1838
1839 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1840 {
1841 return NULL;
1842 }
1843 #endif
1844
1845 static const struct cd_list_entry ide_cd_quirks_list[] = {
1846 /* Limit transfer size per interrupt. */
1847 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1848 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1849 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1850 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1851 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1852 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1853 IDE_AFLAG_PRE_ATAPI12, },
1854 /* Vertos 300, some versions of this drive like to talk BCD. */
1855 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1856 /* Vertos 600 ESD. */
1857 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1858 /*
1859 * Sanyo 3 CD changer uses a non-standard command for CD changing
1860 * (by default standard ATAPI support for CD changers is used).
1861 */
1862 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1863 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1864 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1865 /* Stingray 8X CD-ROM. */
1866 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1867 /*
1868 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1869 * mode sense page capabilities size, but older drives break.
1870 */
1871 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1872 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1873 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1874 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1875 /*
1876 * Some drives used by Apple don't advertise audio play
1877 * but they do support reading TOC & audio datas.
1878 */
1879 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1880 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1881 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1882 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1883 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1884 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1885 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1886 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1887 { NULL, NULL, 0 }
1888 };
1889
1890 static unsigned int ide_cd_flags(u16 *id)
1891 {
1892 const struct cd_list_entry *cle = ide_cd_quirks_list;
1893
1894 while (cle->id_model) {
1895 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1896 (cle->id_firmware == NULL ||
1897 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1898 return cle->cd_flags;
1899 cle++;
1900 }
1901
1902 return 0;
1903 }
1904
1905 static int ide_cdrom_setup(ide_drive_t *drive)
1906 {
1907 struct cdrom_info *cd = drive->driver_data;
1908 struct cdrom_device_info *cdi = &cd->devinfo;
1909 u16 *id = drive->id;
1910 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1911 int nslots;
1912
1913 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1914
1915 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1916 blk_queue_dma_alignment(drive->queue, 31);
1917 blk_queue_update_dma_pad(drive->queue, 15);
1918 drive->queue->unplug_delay = (1 * HZ) / 1000;
1919 if (!drive->queue->unplug_delay)
1920 drive->queue->unplug_delay = 1;
1921
1922 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1923 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1924
1925 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1926 fw_rev[4] == '1' && fw_rev[6] <= '2')
1927 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1928 IDE_AFLAG_TOCADDR_AS_BCD);
1929 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1930 fw_rev[4] == '1' && fw_rev[6] <= '2')
1931 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1932 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1933 /* 3 => use CD in slot 0 */
1934 cdi->sanyo_slot = 3;
1935
1936 nslots = ide_cdrom_probe_capabilities(drive);
1937
1938 /* set correct block size */
1939 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1940
1941 if (ide_cdrom_register(drive, nslots)) {
1942 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1943 " cdrom driver.\n", drive->name, __func__);
1944 cd->devinfo.handle = NULL;
1945 return 1;
1946 }
1947
1948 ide_proc_register_driver(drive, cd->driver);
1949 return 0;
1950 }
1951
1952 static void ide_cd_remove(ide_drive_t *drive)
1953 {
1954 struct cdrom_info *info = drive->driver_data;
1955
1956 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1957
1958 ide_proc_unregister_driver(drive, info->driver);
1959
1960 del_gendisk(info->disk);
1961
1962 ide_cd_put(info);
1963 }
1964
1965 static void ide_cd_release(struct kref *kref)
1966 {
1967 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1968 struct cdrom_device_info *devinfo = &info->devinfo;
1969 ide_drive_t *drive = info->drive;
1970 struct gendisk *g = info->disk;
1971
1972 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1973
1974 kfree(info->toc);
1975 if (devinfo->handle == drive)
1976 unregister_cdrom(devinfo);
1977 drive->driver_data = NULL;
1978 blk_queue_prep_rq(drive->queue, NULL);
1979 g->private_data = NULL;
1980 put_disk(g);
1981 kfree(info);
1982 }
1983
1984 static int ide_cd_probe(ide_drive_t *);
1985
1986 static ide_driver_t ide_cdrom_driver = {
1987 .gen_driver = {
1988 .owner = THIS_MODULE,
1989 .name = "ide-cdrom",
1990 .bus = &ide_bus_type,
1991 },
1992 .probe = ide_cd_probe,
1993 .remove = ide_cd_remove,
1994 .version = IDECD_VERSION,
1995 .do_request = ide_cd_do_request,
1996 .end_request = ide_end_request,
1997 .error = __ide_error,
1998 #ifdef CONFIG_IDE_PROC_FS
1999 .proc_entries = ide_cd_proc_entries,
2000 .proc_devsets = ide_cd_proc_devsets,
2001 #endif
2002 };
2003
2004 static int idecd_open(struct block_device *bdev, fmode_t mode)
2005 {
2006 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
2007 int rc = -ENOMEM;
2008
2009 if (!info)
2010 return -ENXIO;
2011
2012 rc = cdrom_open(&info->devinfo, bdev, mode);
2013
2014 if (rc < 0)
2015 ide_cd_put(info);
2016
2017 return rc;
2018 }
2019
2020 static int idecd_release(struct gendisk *disk, fmode_t mode)
2021 {
2022 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2023
2024 cdrom_release(&info->devinfo, mode);
2025
2026 ide_cd_put(info);
2027
2028 return 0;
2029 }
2030
2031 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2032 {
2033 struct packet_command cgc;
2034 char buffer[16];
2035 int stat;
2036 char spindown;
2037
2038 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2039 return -EFAULT;
2040
2041 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2042
2043 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2044 if (stat)
2045 return stat;
2046
2047 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2048 return cdrom_mode_select(cdi, &cgc);
2049 }
2050
2051 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2052 {
2053 struct packet_command cgc;
2054 char buffer[16];
2055 int stat;
2056 char spindown;
2057
2058 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2059
2060 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2061 if (stat)
2062 return stat;
2063
2064 spindown = buffer[11] & 0x0f;
2065 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2066 return -EFAULT;
2067 return 0;
2068 }
2069
2070 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2071 unsigned int cmd, unsigned long arg)
2072 {
2073 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2074 int err;
2075
2076 switch (cmd) {
2077 case CDROMSETSPINDOWN:
2078 return idecd_set_spindown(&info->devinfo, arg);
2079 case CDROMGETSPINDOWN:
2080 return idecd_get_spindown(&info->devinfo, arg);
2081 default:
2082 break;
2083 }
2084
2085 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2086 if (err == -EINVAL)
2087 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2088
2089 return err;
2090 }
2091
2092 static int idecd_media_changed(struct gendisk *disk)
2093 {
2094 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2095 return cdrom_media_changed(&info->devinfo);
2096 }
2097
2098 static int idecd_revalidate_disk(struct gendisk *disk)
2099 {
2100 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2101 struct request_sense sense;
2102
2103 ide_cd_read_toc(info->drive, &sense);
2104
2105 return 0;
2106 }
2107
2108 static struct block_device_operations idecd_ops = {
2109 .owner = THIS_MODULE,
2110 .open = idecd_open,
2111 .release = idecd_release,
2112 .locked_ioctl = idecd_ioctl,
2113 .media_changed = idecd_media_changed,
2114 .revalidate_disk = idecd_revalidate_disk
2115 };
2116
2117 /* module options */
2118 static char *ignore;
2119 module_param(ignore, charp, 0400);
2120
2121 static unsigned long debug_mask;
2122 module_param(debug_mask, ulong, 0644);
2123
2124 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2125
2126 static int ide_cd_probe(ide_drive_t *drive)
2127 {
2128 struct cdrom_info *info;
2129 struct gendisk *g;
2130 struct request_sense sense;
2131
2132 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2133 "drive->media: 0x%x\n", __func__, drive->driver_req,
2134 drive->media);
2135
2136 if (!strstr("ide-cdrom", drive->driver_req))
2137 goto failed;
2138
2139 if (drive->media != ide_cdrom && drive->media != ide_optical)
2140 goto failed;
2141
2142 /* skip drives that we were told to ignore */
2143 if (ignore != NULL) {
2144 if (strstr(ignore, drive->name)) {
2145 printk(KERN_INFO PFX "ignoring drive %s\n",
2146 drive->name);
2147 goto failed;
2148 }
2149 }
2150
2151 drive->debug_mask = debug_mask;
2152
2153 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2154 if (info == NULL) {
2155 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2156 drive->name);
2157 goto failed;
2158 }
2159
2160 g = alloc_disk(1 << PARTN_BITS);
2161 if (!g)
2162 goto out_free_cd;
2163
2164 ide_init_disk(g, drive);
2165
2166 kref_init(&info->kref);
2167
2168 info->drive = drive;
2169 info->driver = &ide_cdrom_driver;
2170 info->disk = g;
2171
2172 g->private_data = &info->driver;
2173
2174 drive->driver_data = info;
2175
2176 g->minors = 1;
2177 g->driverfs_dev = &drive->gendev;
2178 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2179 if (ide_cdrom_setup(drive)) {
2180 ide_cd_release(&info->kref);
2181 goto failed;
2182 }
2183
2184 ide_cd_read_toc(drive, &sense);
2185 g->fops = &idecd_ops;
2186 g->flags |= GENHD_FL_REMOVABLE;
2187 add_disk(g);
2188 return 0;
2189
2190 out_free_cd:
2191 kfree(info);
2192 failed:
2193 return -ENODEV;
2194 }
2195
2196 static void __exit ide_cdrom_exit(void)
2197 {
2198 driver_unregister(&ide_cdrom_driver.gen_driver);
2199 }
2200
2201 static int __init ide_cdrom_init(void)
2202 {
2203 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2204 return driver_register(&ide_cdrom_driver.gen_driver);
2205 }
2206
2207 MODULE_ALIAS("ide:*m-cdrom*");
2208 MODULE_ALIAS("ide-cd");
2209 module_init(ide_cdrom_init);
2210 module_exit(ide_cdrom_exit);
2211 MODULE_LICENSE("GPL");
Linux 2.6 libata-dev (mirror)