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ide: sanitize ide_build_sglist() and ide_destroy_dmatable()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob35729a47f797f3d721b8cb26f0ec820cde9927ae
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, 2007-2009 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 *
16 * Documentation:
17 * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18 *
19 * For historical changelog please see:
20 * Documentation/ide/ChangeLog.ide-cd.1994-2004
21 */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59 struct cdrom_info *cd = NULL;
60
61 mutex_lock(&idecd_ref_mutex);
62 cd = ide_drv_g(disk, cdrom_info);
63 if (cd) {
64 if (ide_device_get(cd->drive))
65 cd = NULL;
66 else
67 get_device(&cd->dev);
68
69 }
70 mutex_unlock(&idecd_ref_mutex);
71 return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 ide_drive_t *drive = cd->drive;
77
78 mutex_lock(&idecd_ref_mutex);
79 put_device(&cd->dev);
80 ide_device_put(drive);
81 mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85 * Generic packet command support and error handling routines.
86 */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96 struct request_sense *sense)
97 {
98 int log = 0;
99
100 ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103 return 0;
104
105 switch (sense->sense_key) {
106 case NO_SENSE:
107 case RECOVERED_ERROR:
108 break;
109 case NOT_READY:
110 /*
111 * don't care about tray state messages for e.g. capacity
112 * commands or in-progress or becoming ready
113 */
114 if (sense->asc == 0x3a || sense->asc == 0x04)
115 break;
116 log = 1;
117 break;
118 case ILLEGAL_REQUEST:
119 /*
120 * don't log START_STOP unit with LoEj set, since we cannot
121 * reliably check if drive can auto-close
122 */
123 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124 break;
125 log = 1;
126 break;
127 case UNIT_ATTENTION:
128 /*
129 * Make good and sure we've seen this potential media change.
130 * Some drives (i.e. Creative) fail to present the correct sense
131 * key in the error register.
132 */
133 cdrom_saw_media_change(drive);
134 break;
135 default:
136 log = 1;
137 break;
138 }
139 return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143 struct request *failed_command,
144 struct request_sense *sense)
145 {
146 unsigned long sector;
147 unsigned long bio_sectors;
148 struct cdrom_info *info = drive->driver_data;
149
150 ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151 sense->error_code, sense->sense_key);
152
153 if (failed_command)
154 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155 failed_command->cmd[0]);
156
157 if (!cdrom_log_sense(drive, failed_command, sense))
158 return;
159
160 /*
161 * If a read toc is executed for a CD-R or CD-RW medium where the first
162 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163 * confusing error)
164 */
165 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167 return;
168
169 /* current error */
170 if (sense->error_code == 0x70) {
171 switch (sense->sense_key) {
172 case MEDIUM_ERROR:
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
175 if (!sense->valid)
176 break;
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
179 break;
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
184
185 if (drive->queue->hardsect_size == 2048)
186 /* device sector size is 2K */
187 sector <<= 2;
188
189 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190 sector &= ~(bio_sectors - 1);
191
192 /*
193 * The SCSI specification allows for the value
194 * returned by READ CAPACITY to be up to 75 2K
195 * sectors past the last readable block.
196 * Therefore, if we hit a medium error within the
197 * last 75 2K sectors, we decrease the saved size
198 * value.
199 */
200 if (sector < get_capacity(info->disk) &&
201 drive->probed_capacity - sector < 4 * 75)
202 set_capacity(info->disk, sector);
203 }
204 }
205
206 ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
210 struct request *failed_command)
211 {
212 struct cdrom_info *info = drive->driver_data;
213 struct request *rq = &drive->request_sense_rq;
214
215 ide_debug_log(IDE_DBG_SENSE, "enter");
216
217 if (sense == NULL)
218 sense = &info->sense_data;
219
220 /* stuff the sense request in front of our current request */
221 blk_rq_init(NULL, rq);
222 rq->cmd_type = REQ_TYPE_ATA_PC;
223 rq->rq_disk = info->disk;
224
225 rq->data = sense;
226 rq->cmd[0] = GPCMD_REQUEST_SENSE;
227 rq->cmd[4] = 18;
228 rq->data_len = 18;
229
230 rq->cmd_type = REQ_TYPE_SENSE;
231 rq->cmd_flags |= REQ_PREEMPT;
232
233 /* NOTE! Save the failed command in "rq->buffer" */
234 rq->buffer = (void *) failed_command;
235
236 if (failed_command)
237 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
238 failed_command->cmd[0]);
239
240 drive->hwif->rq = NULL;
241
242 elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
243 }
244
245 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
246 {
247 /*
248 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
249 * failed request
250 */
251 struct request *failed = (struct request *)rq->buffer;
252 struct cdrom_info *info = drive->driver_data;
253 void *sense = &info->sense_data;
254
255 if (failed) {
256 if (failed->sense) {
257 sense = failed->sense;
258 failed->sense_len = rq->sense_len;
259 }
260 cdrom_analyze_sense_data(drive, failed, sense);
261
262 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
263 BUG();
264 } else
265 cdrom_analyze_sense_data(drive, NULL, sense);
266 }
267
268 /*
269 * Returns:
270 * 0: if the request should be continued.
271 * 1: if the request will be going through error recovery.
272 * 2: if the request should be ended.
273 */
274 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
275 {
276 ide_hwif_t *hwif = drive->hwif;
277 struct request *rq = hwif->rq;
278 int stat, err, sense_key;
279
280 /* check for errors */
281 stat = hwif->tp_ops->read_status(hwif);
282
283 if (stat_ret)
284 *stat_ret = stat;
285
286 if (OK_STAT(stat, good_stat, BAD_R_STAT))
287 return 0;
288
289 /* get the IDE error register */
290 err = ide_read_error(drive);
291 sense_key = err >> 4;
292
293 ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
294 "rq->cmd_type: 0x%x, err: 0x%x",
295 stat, good_stat, rq->cmd[0], rq->cmd_type,
296 err);
297
298 if (blk_sense_request(rq)) {
299 /*
300 * We got an error trying to get sense info from the drive
301 * (probably while trying to recover from a former error).
302 * Just give up.
303 */
304 rq->cmd_flags |= REQ_FAILED;
305 return 2;
306 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
307 /* All other functions, except for READ. */
308
309 /*
310 * if we have an error, pass back CHECK_CONDITION as the
311 * scsi status byte
312 */
313 if (blk_pc_request(rq) && !rq->errors)
314 rq->errors = SAM_STAT_CHECK_CONDITION;
315
316 /* check for tray open */
317 if (sense_key == NOT_READY) {
318 cdrom_saw_media_change(drive);
319 } else if (sense_key == UNIT_ATTENTION) {
320 /* check for media change */
321 cdrom_saw_media_change(drive);
322 return 0;
323 } else if (sense_key == ILLEGAL_REQUEST &&
324 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
325 /*
326 * Don't print error message for this condition--
327 * SFF8090i indicates that 5/24/00 is the correct
328 * response to a request to close the tray if the
329 * drive doesn't have that capability.
330 * cdrom_log_sense() knows this!
331 */
332 } else if (!(rq->cmd_flags & REQ_QUIET)) {
333 /* otherwise, print an error */
334 ide_dump_status(drive, "packet command error", stat);
335 }
336
337 rq->cmd_flags |= REQ_FAILED;
338
339 /*
340 * instead of playing games with moving completions around,
341 * remove failed request completely and end it when the
342 * request sense has completed
343 */
344 goto end_request;
345
346 } else if (blk_fs_request(rq)) {
347 int do_end_request = 0;
348
349 /* handle errors from READ and WRITE requests */
350
351 if (blk_noretry_request(rq))
352 do_end_request = 1;
353
354 if (sense_key == NOT_READY) {
355 /* tray open */
356 if (rq_data_dir(rq) == READ) {
357 cdrom_saw_media_change(drive);
358
359 /* fail the request */
360 printk(KERN_ERR PFX "%s: tray open\n",
361 drive->name);
362 do_end_request = 1;
363 } else {
364 struct cdrom_info *info = drive->driver_data;
365
366 /*
367 * Allow the drive 5 seconds to recover, some
368 * devices will return this error while flushing
369 * data from cache.
370 */
371 if (!rq->errors)
372 info->write_timeout = jiffies +
373 ATAPI_WAIT_WRITE_BUSY;
374 rq->errors = 1;
375 if (time_after(jiffies, info->write_timeout))
376 do_end_request = 1;
377 else {
378 struct request_queue *q = drive->queue;
379 unsigned long flags;
380
381 /*
382 * take a breather relying on the unplug
383 * timer to kick us again
384 */
385 spin_lock_irqsave(q->queue_lock, flags);
386 blk_plug_device(q);
387 spin_unlock_irqrestore(q->queue_lock, flags);
388
389 return 1;
390 }
391 }
392 } else if (sense_key == UNIT_ATTENTION) {
393 /* media change */
394 cdrom_saw_media_change(drive);
395
396 /*
397 * Arrange to retry the request but be sure to give up
398 * if we've retried too many times.
399 */
400 if (++rq->errors > ERROR_MAX)
401 do_end_request = 1;
402 } else if (sense_key == ILLEGAL_REQUEST ||
403 sense_key == DATA_PROTECT) {
404 /*
405 * No point in retrying after an illegal request or data
406 * protect error.
407 */
408 ide_dump_status(drive, "command error", stat);
409 do_end_request = 1;
410 } else if (sense_key == MEDIUM_ERROR) {
411 /*
412 * No point in re-trying a zillion times on a bad
413 * sector. If we got here the error is not correctable.
414 */
415 ide_dump_status(drive, "media error (bad sector)",
416 stat);
417 do_end_request = 1;
418 } else if (sense_key == BLANK_CHECK) {
419 /* disk appears blank ?? */
420 ide_dump_status(drive, "media error (blank)", stat);
421 do_end_request = 1;
422 } else if ((err & ~ATA_ABORTED) != 0) {
423 /* go to the default handler for other errors */
424 ide_error(drive, "cdrom_decode_status", stat);
425 return 1;
426 } else if ((++rq->errors > ERROR_MAX)) {
427 /* we've racked up too many retries, abort */
428 do_end_request = 1;
429 }
430
431 /*
432 * End a request through request sense analysis when we have
433 * sense data. We need this in order to perform end of media
434 * processing.
435 */
436 if (do_end_request)
437 goto end_request;
438
439 /*
440 * If we got a CHECK_CONDITION status, queue
441 * a request sense command.
442 */
443 if (stat & ATA_ERR)
444 cdrom_queue_request_sense(drive, NULL, NULL);
445 return 1;
446 } else {
447 blk_dump_rq_flags(rq, PFX "bad rq");
448 return 2;
449 }
450
451 end_request:
452 if (stat & ATA_ERR) {
453 struct request_queue *q = drive->queue;
454 unsigned long flags;
455
456 spin_lock_irqsave(q->queue_lock, flags);
457 blkdev_dequeue_request(rq);
458 spin_unlock_irqrestore(q->queue_lock, flags);
459
460 hwif->rq = NULL;
461
462 cdrom_queue_request_sense(drive, rq->sense, rq);
463 return 1;
464 } else
465 return 2;
466 }
467
468 /*
469 * Check the contents of the interrupt reason register from the cdrom
470 * and attempt to recover if there are problems. Returns 0 if everything's
471 * ok; nonzero if the request has been terminated.
472 */
473 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
474 int len, int ireason, int rw)
475 {
476 ide_hwif_t *hwif = drive->hwif;
477
478 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
479
480 /*
481 * ireason == 0: the drive wants to receive data from us
482 * ireason == 2: the drive is expecting to transfer data to us
483 */
484 if (ireason == (!rw << 1))
485 return 0;
486 else if (ireason == (rw << 1)) {
487
488 /* whoops... */
489 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
490 drive->name, __func__);
491
492 ide_pad_transfer(drive, rw, len);
493 } else if (rw == 0 && ireason == 1) {
494 /*
495 * Some drives (ASUS) seem to tell us that status info is
496 * available. Just get it and ignore.
497 */
498 (void)hwif->tp_ops->read_status(hwif);
499 return 0;
500 } else {
501 /* drive wants a command packet, or invalid ireason... */
502 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
503 drive->name, __func__, ireason);
504 }
505
506 if (rq->cmd_type == REQ_TYPE_ATA_PC)
507 rq->cmd_flags |= REQ_FAILED;
508
509 return -1;
510 }
511
512 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
513 {
514 struct request *rq = cmd->rq;
515
516 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
517
518 /*
519 * Some of the trailing request sense fields are optional,
520 * and some drives don't send them. Sigh.
521 */
522 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
523 cmd->nleft > 0 && cmd->nleft <= 5) {
524 unsigned int ofs = cmd->nbytes - cmd->nleft;
525
526 while (cmd->nleft > 0) {
527 *((u8 *)rq->data + ofs++) = 0;
528 cmd->nleft--;
529 }
530 }
531 }
532
533 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
534 int write, void *buffer, unsigned *bufflen,
535 struct request_sense *sense, int timeout,
536 unsigned int cmd_flags)
537 {
538 struct cdrom_info *info = drive->driver_data;
539 struct request_sense local_sense;
540 int retries = 10;
541 unsigned int flags = 0;
542
543 if (!sense)
544 sense = &local_sense;
545
546 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
547 "cmd_flags: 0x%x",
548 cmd[0], write, timeout, cmd_flags);
549
550 /* start of retry loop */
551 do {
552 struct request *rq;
553 int error;
554
555 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
556
557 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
558 rq->cmd_type = REQ_TYPE_ATA_PC;
559 rq->sense = sense;
560 rq->cmd_flags |= cmd_flags;
561 rq->timeout = timeout;
562 if (buffer) {
563 rq->data = buffer;
564 rq->data_len = *bufflen;
565 }
566
567 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
568
569 if (buffer)
570 *bufflen = rq->data_len;
571
572 flags = rq->cmd_flags;
573 blk_put_request(rq);
574
575 /*
576 * FIXME: we should probably abort/retry or something in case of
577 * failure.
578 */
579 if (flags & REQ_FAILED) {
580 /*
581 * The request failed. Retry if it was due to a unit
582 * attention status (usually means media was changed).
583 */
584 struct request_sense *reqbuf = sense;
585
586 if (reqbuf->sense_key == UNIT_ATTENTION)
587 cdrom_saw_media_change(drive);
588 else if (reqbuf->sense_key == NOT_READY &&
589 reqbuf->asc == 4 && reqbuf->ascq != 4) {
590 /*
591 * The drive is in the process of loading
592 * a disk. Retry, but wait a little to give
593 * the drive time to complete the load.
594 */
595 ssleep(2);
596 } else {
597 /* otherwise, don't retry */
598 retries = 0;
599 }
600 --retries;
601 }
602
603 /* end of retry loop */
604 } while ((flags & REQ_FAILED) && retries >= 0);
605
606 /* return an error if the command failed */
607 return (flags & REQ_FAILED) ? -EIO : 0;
608 }
609
610 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
611 {
612 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
613
614 if (cmd->tf_flags & IDE_TFLAG_WRITE)
615 nr_bytes -= cmd->last_xfer_len;
616
617 if (nr_bytes > 0)
618 ide_complete_rq(drive, 0, nr_bytes);
619 }
620
621 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
622 {
623 ide_hwif_t *hwif = drive->hwif;
624 struct ide_cmd *cmd = &hwif->cmd;
625 struct request *rq = hwif->rq;
626 ide_expiry_t *expiry = NULL;
627 int dma_error = 0, dma, stat, thislen, uptodate = 0;
628 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
629 int sense = blk_sense_request(rq);
630 unsigned int timeout;
631 u16 len;
632 u8 ireason;
633
634 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
635 rq->cmd[0], write);
636
637 /* check for errors */
638 dma = drive->dma;
639 if (dma) {
640 drive->dma = 0;
641 drive->waiting_for_dma = 0;
642 dma_error = hwif->dma_ops->dma_end(drive);
643 ide_dma_unmap_sg(drive, cmd);
644 if (dma_error) {
645 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
646 write ? "write" : "read");
647 ide_dma_off(drive);
648 }
649 }
650
651 rc = cdrom_decode_status(drive, 0, &stat);
652 if (rc) {
653 if (rc == 2)
654 goto out_end;
655 return ide_stopped;
656 }
657
658 /* using dma, transfer is complete now */
659 if (dma) {
660 if (dma_error)
661 return ide_error(drive, "dma error", stat);
662 uptodate = 1;
663 goto out_end;
664 }
665
666 ide_read_bcount_and_ireason(drive, &len, &ireason);
667
668 thislen = blk_fs_request(rq) ? len : cmd->nleft;
669 if (thislen > len)
670 thislen = len;
671
672 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
673 stat, thislen);
674
675 /* If DRQ is clear, the command has completed. */
676 if ((stat & ATA_DRQ) == 0) {
677 if (blk_fs_request(rq)) {
678 /*
679 * If we're not done reading/writing, complain.
680 * Otherwise, complete the command normally.
681 */
682 uptodate = 1;
683 if (cmd->nleft > 0) {
684 printk(KERN_ERR PFX "%s: %s: data underrun "
685 "(%u bytes)\n", drive->name, __func__,
686 cmd->nleft);
687 if (!write)
688 rq->cmd_flags |= REQ_FAILED;
689 uptodate = 0;
690 }
691 } else if (!blk_pc_request(rq)) {
692 ide_cd_request_sense_fixup(drive, cmd);
693 /* complain if we still have data left to transfer */
694 uptodate = cmd->nleft ? 0 : 1;
695 if (uptodate == 0)
696 rq->cmd_flags |= REQ_FAILED;
697 }
698 goto out_end;
699 }
700
701 /* check which way to transfer data */
702 rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
703 if (rc)
704 goto out_end;
705
706 cmd->last_xfer_len = 0;
707
708 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
709 "ireason: 0x%x",
710 rq->cmd_type, ireason);
711
712 /* transfer data */
713 while (thislen > 0) {
714 int blen = min_t(int, thislen, cmd->nleft);
715
716 if (cmd->nleft == 0)
717 break;
718
719 ide_pio_bytes(drive, cmd, write, blen);
720 cmd->last_xfer_len += blen;
721
722 thislen -= blen;
723 len -= blen;
724
725 if (sense && write == 0)
726 rq->sense_len += blen;
727 }
728
729 /* pad, if necessary */
730 if (len > 0) {
731 if (blk_fs_request(rq) == 0 || write == 0)
732 ide_pad_transfer(drive, write, len);
733 else {
734 printk(KERN_ERR PFX "%s: confused, missing data\n",
735 drive->name);
736 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
737 }
738 }
739
740 if (blk_pc_request(rq)) {
741 timeout = rq->timeout;
742 } else {
743 timeout = ATAPI_WAIT_PC;
744 if (!blk_fs_request(rq))
745 expiry = ide_cd_expiry;
746 }
747
748 hwif->expiry = expiry;
749 ide_set_handler(drive, cdrom_newpc_intr, timeout);
750 return ide_started;
751
752 out_end:
753 if (blk_pc_request(rq) && rc == 0) {
754 unsigned int dlen = rq->data_len;
755
756 rq->data_len = 0;
757
758 if (blk_end_request(rq, 0, dlen))
759 BUG();
760
761 hwif->rq = NULL;
762 } else {
763 if (sense && uptodate)
764 ide_cd_complete_failed_rq(drive, rq);
765
766 if (blk_fs_request(rq)) {
767 if (cmd->nleft == 0)
768 uptodate = 1;
769 } else {
770 if (uptodate <= 0 && rq->errors == 0)
771 rq->errors = -EIO;
772 }
773
774 if (uptodate == 0)
775 ide_cd_error_cmd(drive, cmd);
776
777 /* make sure it's fully ended */
778 if (blk_pc_request(rq))
779 nsectors = (rq->data_len + 511) >> 9;
780 else
781 nsectors = rq->hard_nr_sectors;
782
783 if (nsectors == 0)
784 nsectors = 1;
785
786 if (blk_fs_request(rq) == 0) {
787 rq->data_len -= (cmd->nbytes - cmd->nleft);
788 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
789 rq->data_len += cmd->last_xfer_len;
790 }
791
792 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
793
794 if (sense && rc == 2)
795 ide_error(drive, "request sense failure", stat);
796 }
797 return ide_stopped;
798 }
799
800 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
801 {
802 struct cdrom_info *cd = drive->driver_data;
803 struct request_queue *q = drive->queue;
804 int write = rq_data_dir(rq) == WRITE;
805 unsigned short sectors_per_frame =
806 queue_hardsect_size(q) >> SECTOR_BITS;
807
808 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
809 "secs_per_frame: %u",
810 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
811
812 if (write) {
813 /* disk has become write protected */
814 if (get_disk_ro(cd->disk))
815 return ide_stopped;
816 } else {
817 /*
818 * We may be retrying this request after an error. Fix up any
819 * weirdness which might be present in the request packet.
820 */
821 q->prep_rq_fn(q, rq);
822 }
823
824 /* fs requests *must* be hardware frame aligned */
825 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
826 (rq->sector & (sectors_per_frame - 1)))
827 return ide_stopped;
828
829 /* use DMA, if possible */
830 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
831
832 if (write)
833 cd->devinfo.media_written = 1;
834
835 rq->timeout = ATAPI_WAIT_PC;
836
837 return ide_started;
838 }
839
840 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
841 {
842
843 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
844 rq->cmd[0], rq->cmd_type);
845
846 if (blk_pc_request(rq))
847 rq->cmd_flags |= REQ_QUIET;
848 else
849 rq->cmd_flags &= ~REQ_FAILED;
850
851 drive->dma = 0;
852
853 /* sg request */
854 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
855 struct request_queue *q = drive->queue;
856 unsigned int alignment;
857 char *buf;
858
859 if (rq->bio)
860 buf = bio_data(rq->bio);
861 else
862 buf = rq->data;
863
864 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
865
866 /*
867 * check if dma is safe
868 *
869 * NOTE! The "len" and "addr" checks should possibly have
870 * separate masks.
871 */
872 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
873 if ((unsigned long)buf & alignment
874 || rq->data_len & q->dma_pad_mask
875 || object_is_on_stack(buf))
876 drive->dma = 0;
877 }
878 }
879
880 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
881 sector_t block)
882 {
883 struct ide_cmd cmd;
884 int uptodate = 0, nsectors;
885
886 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
887 rq->cmd[0], (unsigned long long)block);
888
889 if (drive->debug_mask & IDE_DBG_RQ)
890 blk_dump_rq_flags(rq, "ide_cd_do_request");
891
892 if (blk_fs_request(rq)) {
893 if (cdrom_start_rw(drive, rq) == ide_stopped)
894 goto out_end;
895 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
896 rq->cmd_type == REQ_TYPE_ATA_PC) {
897 if (!rq->timeout)
898 rq->timeout = ATAPI_WAIT_PC;
899
900 cdrom_do_block_pc(drive, rq);
901 } else if (blk_special_request(rq)) {
902 /* right now this can only be a reset... */
903 uptodate = 1;
904 goto out_end;
905 } else {
906 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
907 if (rq->errors == 0)
908 rq->errors = -EIO;
909 goto out_end;
910 }
911
912 memset(&cmd, 0, sizeof(cmd));
913
914 if (rq_data_dir(rq))
915 cmd.tf_flags |= IDE_TFLAG_WRITE;
916
917 cmd.rq = rq;
918
919 if (blk_fs_request(rq) || rq->data_len) {
920 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
921 : rq->data_len);
922 ide_map_sg(drive, &cmd);
923 }
924
925 return ide_issue_pc(drive, &cmd);
926 out_end:
927 nsectors = rq->hard_nr_sectors;
928
929 if (nsectors == 0)
930 nsectors = 1;
931
932 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
933
934 return ide_stopped;
935 }
936
937 /*
938 * Ioctl handling.
939 *
940 * Routines which queue packet commands take as a final argument a pointer to a
941 * request_sense struct. If execution of the command results in an error with a
942 * CHECK CONDITION status, this structure will be filled with the results of the
943 * subsequent request sense command. The pointer can also be NULL, in which case
944 * no sense information is returned.
945 */
946 static void msf_from_bcd(struct atapi_msf *msf)
947 {
948 msf->minute = bcd2bin(msf->minute);
949 msf->second = bcd2bin(msf->second);
950 msf->frame = bcd2bin(msf->frame);
951 }
952
953 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
954 {
955 struct cdrom_info *info = drive->driver_data;
956 struct cdrom_device_info *cdi = &info->devinfo;
957 unsigned char cmd[BLK_MAX_CDB];
958
959 ide_debug_log(IDE_DBG_FUNC, "enter");
960
961 memset(cmd, 0, BLK_MAX_CDB);
962 cmd[0] = GPCMD_TEST_UNIT_READY;
963
964 /*
965 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
966 * instead of supporting the LOAD_UNLOAD opcode.
967 */
968 cmd[7] = cdi->sanyo_slot % 3;
969
970 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
971 }
972
973 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
974 unsigned long *sectors_per_frame,
975 struct request_sense *sense)
976 {
977 struct {
978 __be32 lba;
979 __be32 blocklen;
980 } capbuf;
981
982 int stat;
983 unsigned char cmd[BLK_MAX_CDB];
984 unsigned len = sizeof(capbuf);
985 u32 blocklen;
986
987 ide_debug_log(IDE_DBG_FUNC, "enter");
988
989 memset(cmd, 0, BLK_MAX_CDB);
990 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
991
992 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
993 REQ_QUIET);
994 if (stat)
995 return stat;
996
997 /*
998 * Sanity check the given block size
999 */
1000 blocklen = be32_to_cpu(capbuf.blocklen);
1001 switch (blocklen) {
1002 case 512:
1003 case 1024:
1004 case 2048:
1005 case 4096:
1006 break;
1007 default:
1008 printk(KERN_ERR PFX "%s: weird block size %u\n",
1009 drive->name, blocklen);
1010 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1011 drive->name);
1012 blocklen = 2048;
1013 break;
1014 }
1015
1016 *capacity = 1 + be32_to_cpu(capbuf.lba);
1017 *sectors_per_frame = blocklen >> SECTOR_BITS;
1018
1019 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1020 *capacity, *sectors_per_frame);
1021
1022 return 0;
1023 }
1024
1025 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1026 int format, char *buf, int buflen,
1027 struct request_sense *sense)
1028 {
1029 unsigned char cmd[BLK_MAX_CDB];
1030
1031 ide_debug_log(IDE_DBG_FUNC, "enter");
1032
1033 memset(cmd, 0, BLK_MAX_CDB);
1034
1035 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1036 cmd[6] = trackno;
1037 cmd[7] = (buflen >> 8);
1038 cmd[8] = (buflen & 0xff);
1039 cmd[9] = (format << 6);
1040
1041 if (msf_flag)
1042 cmd[1] = 2;
1043
1044 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1045 }
1046
1047 /* Try to read the entire TOC for the disk into our internal buffer. */
1048 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1049 {
1050 int stat, ntracks, i;
1051 struct cdrom_info *info = drive->driver_data;
1052 struct cdrom_device_info *cdi = &info->devinfo;
1053 struct atapi_toc *toc = info->toc;
1054 struct {
1055 struct atapi_toc_header hdr;
1056 struct atapi_toc_entry ent;
1057 } ms_tmp;
1058 long last_written;
1059 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1060
1061 ide_debug_log(IDE_DBG_FUNC, "enter");
1062
1063 if (toc == NULL) {
1064 /* try to allocate space */
1065 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1066 if (toc == NULL) {
1067 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1068 drive->name);
1069 return -ENOMEM;
1070 }
1071 info->toc = toc;
1072 }
1073
1074 /*
1075 * Check to see if the existing data is still valid. If it is,
1076 * just return.
1077 */
1078 (void) cdrom_check_status(drive, sense);
1079
1080 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1081 return 0;
1082
1083 /* try to get the total cdrom capacity and sector size */
1084 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1085 sense);
1086 if (stat)
1087 toc->capacity = 0x1fffff;
1088
1089 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1090 /* save a private copy of the TOC capacity for error handling */
1091 drive->probed_capacity = toc->capacity * sectors_per_frame;
1092
1093 blk_queue_hardsect_size(drive->queue,
1094 sectors_per_frame << SECTOR_BITS);
1095
1096 /* first read just the header, so we know how long the TOC is */
1097 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1098 sizeof(struct atapi_toc_header), sense);
1099 if (stat)
1100 return stat;
1101
1102 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1103 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1104 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1105 }
1106
1107 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1108 if (ntracks <= 0)
1109 return -EIO;
1110 if (ntracks > MAX_TRACKS)
1111 ntracks = MAX_TRACKS;
1112
1113 /* now read the whole schmeer */
1114 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1115 (char *)&toc->hdr,
1116 sizeof(struct atapi_toc_header) +
1117 (ntracks + 1) *
1118 sizeof(struct atapi_toc_entry), sense);
1119
1120 if (stat && toc->hdr.first_track > 1) {
1121 /*
1122 * Cds with CDI tracks only don't have any TOC entries, despite
1123 * of this the returned values are
1124 * first_track == last_track = number of CDI tracks + 1,
1125 * so that this case is indistinguishable from the same layout
1126 * plus an additional audio track. If we get an error for the
1127 * regular case, we assume a CDI without additional audio
1128 * tracks. In this case the readable TOC is empty (CDI tracks
1129 * are not included) and only holds the Leadout entry.
1130 *
1131 * Heiko Eißfeldt.
1132 */
1133 ntracks = 0;
1134 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1135 (char *)&toc->hdr,
1136 sizeof(struct atapi_toc_header) +
1137 (ntracks + 1) *
1138 sizeof(struct atapi_toc_entry),
1139 sense);
1140 if (stat)
1141 return stat;
1142
1143 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1144 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1145 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1146 } else {
1147 toc->hdr.first_track = CDROM_LEADOUT;
1148 toc->hdr.last_track = CDROM_LEADOUT;
1149 }
1150 }
1151
1152 if (stat)
1153 return stat;
1154
1155 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1156
1157 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1158 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1159 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1160 }
1161
1162 for (i = 0; i <= ntracks; i++) {
1163 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1164 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1165 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1166 msf_from_bcd(&toc->ent[i].addr.msf);
1167 }
1168 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1169 toc->ent[i].addr.msf.second,
1170 toc->ent[i].addr.msf.frame);
1171 }
1172
1173 if (toc->hdr.first_track != CDROM_LEADOUT) {
1174 /* read the multisession information */
1175 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1176 sizeof(ms_tmp), sense);
1177 if (stat)
1178 return stat;
1179
1180 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1181 } else {
1182 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1183 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1184 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1185 }
1186
1187 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1188 /* re-read multisession information using MSF format */
1189 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1190 sizeof(ms_tmp), sense);
1191 if (stat)
1192 return stat;
1193
1194 msf_from_bcd(&ms_tmp.ent.addr.msf);
1195 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1196 ms_tmp.ent.addr.msf.second,
1197 ms_tmp.ent.addr.msf.frame);
1198 }
1199
1200 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1201
1202 /* now try to get the total cdrom capacity */
1203 stat = cdrom_get_last_written(cdi, &last_written);
1204 if (!stat && (last_written > toc->capacity)) {
1205 toc->capacity = last_written;
1206 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1207 drive->probed_capacity = toc->capacity * sectors_per_frame;
1208 }
1209
1210 /* Remember that we've read this stuff. */
1211 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1212
1213 return 0;
1214 }
1215
1216 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1217 {
1218 struct cdrom_info *info = drive->driver_data;
1219 struct cdrom_device_info *cdi = &info->devinfo;
1220 struct packet_command cgc;
1221 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1222
1223 ide_debug_log(IDE_DBG_FUNC, "enter");
1224
1225 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1226 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1227
1228 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1229 do {
1230 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1231 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1232 if (!stat)
1233 break;
1234 } while (--attempts);
1235 return stat;
1236 }
1237
1238 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1239 {
1240 struct cdrom_info *cd = drive->driver_data;
1241 u16 curspeed, maxspeed;
1242
1243 ide_debug_log(IDE_DBG_FUNC, "enter");
1244
1245 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1246 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1247 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1248 } else {
1249 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1250 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1251 }
1252
1253 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1254 curspeed, maxspeed);
1255
1256 cd->current_speed = (curspeed + (176/2)) / 176;
1257 cd->max_speed = (maxspeed + (176/2)) / 176;
1258 }
1259
1260 #define IDE_CD_CAPABILITIES \
1261 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1262 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1263 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1264 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1265 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1266
1267 static struct cdrom_device_ops ide_cdrom_dops = {
1268 .open = ide_cdrom_open_real,
1269 .release = ide_cdrom_release_real,
1270 .drive_status = ide_cdrom_drive_status,
1271 .media_changed = ide_cdrom_check_media_change_real,
1272 .tray_move = ide_cdrom_tray_move,
1273 .lock_door = ide_cdrom_lock_door,
1274 .select_speed = ide_cdrom_select_speed,
1275 .get_last_session = ide_cdrom_get_last_session,
1276 .get_mcn = ide_cdrom_get_mcn,
1277 .reset = ide_cdrom_reset,
1278 .audio_ioctl = ide_cdrom_audio_ioctl,
1279 .capability = IDE_CD_CAPABILITIES,
1280 .generic_packet = ide_cdrom_packet,
1281 };
1282
1283 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1284 {
1285 struct cdrom_info *info = drive->driver_data;
1286 struct cdrom_device_info *devinfo = &info->devinfo;
1287
1288 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1289
1290 devinfo->ops = &ide_cdrom_dops;
1291 devinfo->speed = info->current_speed;
1292 devinfo->capacity = nslots;
1293 devinfo->handle = drive;
1294 strcpy(devinfo->name, drive->name);
1295
1296 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1297 devinfo->mask |= CDC_SELECT_SPEED;
1298
1299 devinfo->disk = info->disk;
1300 return register_cdrom(devinfo);
1301 }
1302
1303 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1304 {
1305 struct cdrom_info *cd = drive->driver_data;
1306 struct cdrom_device_info *cdi = &cd->devinfo;
1307 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1308 mechtype_t mechtype;
1309 int nslots = 1;
1310
1311 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1312 drive->media, drive->atapi_flags);
1313
1314 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1315 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1316 CDC_MO_DRIVE | CDC_RAM);
1317
1318 if (drive->media == ide_optical) {
1319 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1320 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1321 drive->name);
1322 return nslots;
1323 }
1324
1325 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1326 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1327 cdi->mask &= ~CDC_PLAY_AUDIO;
1328 return nslots;
1329 }
1330
1331 /*
1332 * We have to cheat a little here. the packet will eventually be queued
1333 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1334 * Since this device hasn't been registered with the Uniform layer yet,
1335 * it can't do this. Same goes for cdi->ops.
1336 */
1337 cdi->handle = drive;
1338 cdi->ops = &ide_cdrom_dops;
1339
1340 if (ide_cdrom_get_capabilities(drive, buf))
1341 return 0;
1342
1343 if ((buf[8 + 6] & 0x01) == 0)
1344 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1345 if (buf[8 + 6] & 0x08)
1346 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1347 if (buf[8 + 3] & 0x01)
1348 cdi->mask &= ~CDC_CD_R;
1349 if (buf[8 + 3] & 0x02)
1350 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1351 if (buf[8 + 2] & 0x38)
1352 cdi->mask &= ~CDC_DVD;
1353 if (buf[8 + 3] & 0x20)
1354 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1355 if (buf[8 + 3] & 0x10)
1356 cdi->mask &= ~CDC_DVD_R;
1357 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1358 cdi->mask &= ~CDC_PLAY_AUDIO;
1359
1360 mechtype = buf[8 + 6] >> 5;
1361 if (mechtype == mechtype_caddy ||
1362 mechtype == mechtype_popup ||
1363 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1364 cdi->mask |= CDC_CLOSE_TRAY;
1365
1366 if (cdi->sanyo_slot > 0) {
1367 cdi->mask &= ~CDC_SELECT_DISC;
1368 nslots = 3;
1369 } else if (mechtype == mechtype_individual_changer ||
1370 mechtype == mechtype_cartridge_changer) {
1371 nslots = cdrom_number_of_slots(cdi);
1372 if (nslots > 1)
1373 cdi->mask &= ~CDC_SELECT_DISC;
1374 }
1375
1376 ide_cdrom_update_speed(drive, buf);
1377
1378 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1379
1380 /* don't print speed if the drive reported 0 */
1381 if (cd->max_speed)
1382 printk(KERN_CONT " %dX", cd->max_speed);
1383
1384 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1385
1386 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1387 printk(KERN_CONT " DVD%s%s",
1388 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1389 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1390
1391 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1392 printk(KERN_CONT " CD%s%s",
1393 (cdi->mask & CDC_CD_R) ? "" : "-R",
1394 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1395
1396 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1397 printk(KERN_CONT " changer w/%d slots", nslots);
1398 else
1399 printk(KERN_CONT " drive");
1400
1401 printk(KERN_CONT ", %dkB Cache\n",
1402 be16_to_cpup((__be16 *)&buf[8 + 12]));
1403
1404 return nslots;
1405 }
1406
1407 /* standard prep_rq_fn that builds 10 byte cmds */
1408 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1409 {
1410 int hard_sect = queue_hardsect_size(q);
1411 long block = (long)rq->hard_sector / (hard_sect >> 9);
1412 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1413
1414 memset(rq->cmd, 0, BLK_MAX_CDB);
1415
1416 if (rq_data_dir(rq) == READ)
1417 rq->cmd[0] = GPCMD_READ_10;
1418 else
1419 rq->cmd[0] = GPCMD_WRITE_10;
1420
1421 /*
1422 * fill in lba
1423 */
1424 rq->cmd[2] = (block >> 24) & 0xff;
1425 rq->cmd[3] = (block >> 16) & 0xff;
1426 rq->cmd[4] = (block >> 8) & 0xff;
1427 rq->cmd[5] = block & 0xff;
1428
1429 /*
1430 * and transfer length
1431 */
1432 rq->cmd[7] = (blocks >> 8) & 0xff;
1433 rq->cmd[8] = blocks & 0xff;
1434 rq->cmd_len = 10;
1435 return BLKPREP_OK;
1436 }
1437
1438 /*
1439 * Most of the SCSI commands are supported directly by ATAPI devices.
1440 * This transform handles the few exceptions.
1441 */
1442 static int ide_cdrom_prep_pc(struct request *rq)
1443 {
1444 u8 *c = rq->cmd;
1445
1446 /* transform 6-byte read/write commands to the 10-byte version */
1447 if (c[0] == READ_6 || c[0] == WRITE_6) {
1448 c[8] = c[4];
1449 c[5] = c[3];
1450 c[4] = c[2];
1451 c[3] = c[1] & 0x1f;
1452 c[2] = 0;
1453 c[1] &= 0xe0;
1454 c[0] += (READ_10 - READ_6);
1455 rq->cmd_len = 10;
1456 return BLKPREP_OK;
1457 }
1458
1459 /*
1460 * it's silly to pretend we understand 6-byte sense commands, just
1461 * reject with ILLEGAL_REQUEST and the caller should take the
1462 * appropriate action
1463 */
1464 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1465 rq->errors = ILLEGAL_REQUEST;
1466 return BLKPREP_KILL;
1467 }
1468
1469 return BLKPREP_OK;
1470 }
1471
1472 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1473 {
1474 if (blk_fs_request(rq))
1475 return ide_cdrom_prep_fs(q, rq);
1476 else if (blk_pc_request(rq))
1477 return ide_cdrom_prep_pc(rq);
1478
1479 return 0;
1480 }
1481
1482 struct cd_list_entry {
1483 const char *id_model;
1484 const char *id_firmware;
1485 unsigned int cd_flags;
1486 };
1487
1488 #ifdef CONFIG_IDE_PROC_FS
1489 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1490 {
1491 unsigned long capacity, sectors_per_frame;
1492
1493 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1494 return 0;
1495
1496 return capacity * sectors_per_frame;
1497 }
1498
1499 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1500 int count, int *eof, void *data)
1501 {
1502 ide_drive_t *drive = data;
1503 int len;
1504
1505 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1506 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1507 }
1508
1509 static ide_proc_entry_t idecd_proc[] = {
1510 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1511 { NULL, 0, NULL, NULL }
1512 };
1513
1514 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1515 {
1516 return idecd_proc;
1517 }
1518
1519 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1520 {
1521 return NULL;
1522 }
1523 #endif
1524
1525 static const struct cd_list_entry ide_cd_quirks_list[] = {
1526 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1527 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1528 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1529 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1530 IDE_AFLAG_PRE_ATAPI12, },
1531 /* Vertos 300, some versions of this drive like to talk BCD. */
1532 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1533 /* Vertos 600 ESD. */
1534 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1535 /*
1536 * Sanyo 3 CD changer uses a non-standard command for CD changing
1537 * (by default standard ATAPI support for CD changers is used).
1538 */
1539 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1540 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1541 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1542 /* Stingray 8X CD-ROM. */
1543 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1544 /*
1545 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1546 * mode sense page capabilities size, but older drives break.
1547 */
1548 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1549 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1550 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1551 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1552 /*
1553 * Some drives used by Apple don't advertise audio play
1554 * but they do support reading TOC & audio datas.
1555 */
1556 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1557 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1558 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1559 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1560 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1561 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1562 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1563 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1564 { NULL, NULL, 0 }
1565 };
1566
1567 static unsigned int ide_cd_flags(u16 *id)
1568 {
1569 const struct cd_list_entry *cle = ide_cd_quirks_list;
1570
1571 while (cle->id_model) {
1572 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1573 (cle->id_firmware == NULL ||
1574 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1575 return cle->cd_flags;
1576 cle++;
1577 }
1578
1579 return 0;
1580 }
1581
1582 static int ide_cdrom_setup(ide_drive_t *drive)
1583 {
1584 struct cdrom_info *cd = drive->driver_data;
1585 struct cdrom_device_info *cdi = &cd->devinfo;
1586 struct request_queue *q = drive->queue;
1587 u16 *id = drive->id;
1588 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1589 int nslots;
1590
1591 ide_debug_log(IDE_DBG_PROBE, "enter");
1592
1593 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1594 blk_queue_dma_alignment(q, 31);
1595 blk_queue_update_dma_pad(q, 15);
1596
1597 q->unplug_delay = max((1 * HZ) / 1000, 1);
1598
1599 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1600 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1601
1602 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1603 fw_rev[4] == '1' && fw_rev[6] <= '2')
1604 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1605 IDE_AFLAG_TOCADDR_AS_BCD);
1606 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1607 fw_rev[4] == '1' && fw_rev[6] <= '2')
1608 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1609 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1610 /* 3 => use CD in slot 0 */
1611 cdi->sanyo_slot = 3;
1612
1613 nslots = ide_cdrom_probe_capabilities(drive);
1614
1615 blk_queue_hardsect_size(q, CD_FRAMESIZE);
1616
1617 if (ide_cdrom_register(drive, nslots)) {
1618 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1619 " cdrom driver.\n", drive->name, __func__);
1620 cd->devinfo.handle = NULL;
1621 return 1;
1622 }
1623
1624 ide_proc_register_driver(drive, cd->driver);
1625 return 0;
1626 }
1627
1628 static void ide_cd_remove(ide_drive_t *drive)
1629 {
1630 struct cdrom_info *info = drive->driver_data;
1631
1632 ide_debug_log(IDE_DBG_FUNC, "enter");
1633
1634 ide_proc_unregister_driver(drive, info->driver);
1635 device_del(&info->dev);
1636 del_gendisk(info->disk);
1637
1638 mutex_lock(&idecd_ref_mutex);
1639 put_device(&info->dev);
1640 mutex_unlock(&idecd_ref_mutex);
1641 }
1642
1643 static void ide_cd_release(struct device *dev)
1644 {
1645 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1646 struct cdrom_device_info *devinfo = &info->devinfo;
1647 ide_drive_t *drive = info->drive;
1648 struct gendisk *g = info->disk;
1649
1650 ide_debug_log(IDE_DBG_FUNC, "enter");
1651
1652 kfree(info->toc);
1653 if (devinfo->handle == drive)
1654 unregister_cdrom(devinfo);
1655 drive->driver_data = NULL;
1656 blk_queue_prep_rq(drive->queue, NULL);
1657 g->private_data = NULL;
1658 put_disk(g);
1659 kfree(info);
1660 }
1661
1662 static int ide_cd_probe(ide_drive_t *);
1663
1664 static struct ide_driver ide_cdrom_driver = {
1665 .gen_driver = {
1666 .owner = THIS_MODULE,
1667 .name = "ide-cdrom",
1668 .bus = &ide_bus_type,
1669 },
1670 .probe = ide_cd_probe,
1671 .remove = ide_cd_remove,
1672 .version = IDECD_VERSION,
1673 .do_request = ide_cd_do_request,
1674 #ifdef CONFIG_IDE_PROC_FS
1675 .proc_entries = ide_cd_proc_entries,
1676 .proc_devsets = ide_cd_proc_devsets,
1677 #endif
1678 };
1679
1680 static int idecd_open(struct block_device *bdev, fmode_t mode)
1681 {
1682 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1683 int rc = -ENOMEM;
1684
1685 if (!info)
1686 return -ENXIO;
1687
1688 rc = cdrom_open(&info->devinfo, bdev, mode);
1689
1690 if (rc < 0)
1691 ide_cd_put(info);
1692
1693 return rc;
1694 }
1695
1696 static int idecd_release(struct gendisk *disk, fmode_t mode)
1697 {
1698 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1699
1700 cdrom_release(&info->devinfo, mode);
1701
1702 ide_cd_put(info);
1703
1704 return 0;
1705 }
1706
1707 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1708 {
1709 struct packet_command cgc;
1710 char buffer[16];
1711 int stat;
1712 char spindown;
1713
1714 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1715 return -EFAULT;
1716
1717 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1718
1719 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1720 if (stat)
1721 return stat;
1722
1723 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1724 return cdrom_mode_select(cdi, &cgc);
1725 }
1726
1727 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1728 {
1729 struct packet_command cgc;
1730 char buffer[16];
1731 int stat;
1732 char spindown;
1733
1734 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1735
1736 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1737 if (stat)
1738 return stat;
1739
1740 spindown = buffer[11] & 0x0f;
1741 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1742 return -EFAULT;
1743 return 0;
1744 }
1745
1746 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1747 unsigned int cmd, unsigned long arg)
1748 {
1749 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1750 int err;
1751
1752 switch (cmd) {
1753 case CDROMSETSPINDOWN:
1754 return idecd_set_spindown(&info->devinfo, arg);
1755 case CDROMGETSPINDOWN:
1756 return idecd_get_spindown(&info->devinfo, arg);
1757 default:
1758 break;
1759 }
1760
1761 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1762 if (err == -EINVAL)
1763 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1764
1765 return err;
1766 }
1767
1768 static int idecd_media_changed(struct gendisk *disk)
1769 {
1770 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1771 return cdrom_media_changed(&info->devinfo);
1772 }
1773
1774 static int idecd_revalidate_disk(struct gendisk *disk)
1775 {
1776 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1777 struct request_sense sense;
1778
1779 ide_cd_read_toc(info->drive, &sense);
1780
1781 return 0;
1782 }
1783
1784 static struct block_device_operations idecd_ops = {
1785 .owner = THIS_MODULE,
1786 .open = idecd_open,
1787 .release = idecd_release,
1788 .locked_ioctl = idecd_ioctl,
1789 .media_changed = idecd_media_changed,
1790 .revalidate_disk = idecd_revalidate_disk
1791 };
1792
1793 /* module options */
1794 static unsigned long debug_mask;
1795 module_param(debug_mask, ulong, 0644);
1796
1797 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1798
1799 static int ide_cd_probe(ide_drive_t *drive)
1800 {
1801 struct cdrom_info *info;
1802 struct gendisk *g;
1803 struct request_sense sense;
1804
1805 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1806 drive->driver_req, drive->media);
1807
1808 if (!strstr("ide-cdrom", drive->driver_req))
1809 goto failed;
1810
1811 if (drive->media != ide_cdrom && drive->media != ide_optical)
1812 goto failed;
1813
1814 drive->debug_mask = debug_mask;
1815 drive->irq_handler = cdrom_newpc_intr;
1816
1817 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1818 if (info == NULL) {
1819 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1820 drive->name);
1821 goto failed;
1822 }
1823
1824 g = alloc_disk(1 << PARTN_BITS);
1825 if (!g)
1826 goto out_free_cd;
1827
1828 ide_init_disk(g, drive);
1829
1830 info->dev.parent = &drive->gendev;
1831 info->dev.release = ide_cd_release;
1832 dev_set_name(&info->dev, dev_name(&drive->gendev));
1833
1834 if (device_register(&info->dev))
1835 goto out_free_disk;
1836
1837 info->drive = drive;
1838 info->driver = &ide_cdrom_driver;
1839 info->disk = g;
1840
1841 g->private_data = &info->driver;
1842
1843 drive->driver_data = info;
1844
1845 g->minors = 1;
1846 g->driverfs_dev = &drive->gendev;
1847 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1848 if (ide_cdrom_setup(drive)) {
1849 put_device(&info->dev);
1850 goto failed;
1851 }
1852
1853 ide_cd_read_toc(drive, &sense);
1854 g->fops = &idecd_ops;
1855 g->flags |= GENHD_FL_REMOVABLE;
1856 add_disk(g);
1857 return 0;
1858
1859 out_free_disk:
1860 put_disk(g);
1861 out_free_cd:
1862 kfree(info);
1863 failed:
1864 return -ENODEV;
1865 }
1866
1867 static void __exit ide_cdrom_exit(void)
1868 {
1869 driver_unregister(&ide_cdrom_driver.gen_driver);
1870 }
1871
1872 static int __init ide_cdrom_init(void)
1873 {
1874 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1875 return driver_register(&ide_cdrom_driver.gen_driver);
1876 }
1877
1878 MODULE_ALIAS("ide:*m-cdrom*");
1879 MODULE_ALIAS("ide-cd");
1880 module_init(ide_cdrom_init);
1881 module_exit(ide_cdrom_exit);
1882 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree