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virtio_blk: don't bounce highmem requests
[linux-2.6/mini2440.git] / drivers / ide / ide-cd.c
blob6368f57231378ec84891ebdac6e9242fc856a48e
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 /*
270 * Allow the drive 5 seconds to recover; some devices will return NOT_READY
271 * while flushing data from cache.
272 *
273 * returns: 0 failed (write timeout expired)
274 * 1 success
275 */
276 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
277 {
278
279 struct cdrom_info *info = drive->driver_data;
280
281 if (!rq->errors)
282 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
283
284 rq->errors = 1;
285
286 if (time_after(jiffies, info->write_timeout))
287 return 0;
288 else {
289 struct request_queue *q = drive->queue;
290 unsigned long flags;
291
292 /*
293 * take a breather relying on the unplug timer to kick us again
294 */
295
296 spin_lock_irqsave(q->queue_lock, flags);
297 blk_plug_device(q);
298 spin_unlock_irqrestore(q->queue_lock, flags);
299
300 return 1;
301 }
302 }
303
304 /**
305 * Returns:
306 * 0: if the request should be continued.
307 * 1: if the request will be going through error recovery.
308 * 2: if the request should be ended.
309 */
310 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
311 {
312 ide_hwif_t *hwif = drive->hwif;
313 struct request *rq = hwif->rq;
314 int err, sense_key, do_end_request = 0;
315
316 /* get the IDE error register */
317 err = ide_read_error(drive);
318 sense_key = err >> 4;
319
320 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
321 "stat 0x%x",
322 rq->cmd[0], rq->cmd_type, err, stat);
323
324 if (blk_sense_request(rq)) {
325 /*
326 * We got an error trying to get sense info from the drive
327 * (probably while trying to recover from a former error).
328 * Just give up.
329 */
330 rq->cmd_flags |= REQ_FAILED;
331 return 2;
332 }
333
334 /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
335 if (blk_pc_request(rq) && !rq->errors)
336 rq->errors = SAM_STAT_CHECK_CONDITION;
337
338 if (blk_noretry_request(rq))
339 do_end_request = 1;
340
341 switch (sense_key) {
342 case NOT_READY:
343 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
344 if (ide_cd_breathe(drive, rq))
345 return 1;
346 } else {
347 cdrom_saw_media_change(drive);
348
349 if (blk_fs_request(rq) && !blk_rq_quiet(rq))
350 printk(KERN_ERR PFX "%s: tray open\n",
351 drive->name);
352 }
353 do_end_request = 1;
354 break;
355 case UNIT_ATTENTION:
356 cdrom_saw_media_change(drive);
357
358 if (blk_fs_request(rq) == 0)
359 return 0;
360
361 /*
362 * Arrange to retry the request but be sure to give up if we've
363 * retried too many times.
364 */
365 if (++rq->errors > ERROR_MAX)
366 do_end_request = 1;
367 break;
368 case ILLEGAL_REQUEST:
369 /*
370 * Don't print error message for this condition -- SFF8090i
371 * indicates that 5/24/00 is the correct response to a request
372 * to close the tray if the drive doesn't have that capability.
373 *
374 * cdrom_log_sense() knows this!
375 */
376 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
377 break;
378 /* fall-through */
379 case DATA_PROTECT:
380 /*
381 * No point in retrying after an illegal request or data
382 * protect error.
383 */
384 if (!blk_rq_quiet(rq))
385 ide_dump_status(drive, "command error", stat);
386 do_end_request = 1;
387 break;
388 case MEDIUM_ERROR:
389 /*
390 * No point in re-trying a zillion times on a bad sector.
391 * If we got here the error is not correctable.
392 */
393 if (!blk_rq_quiet(rq))
394 ide_dump_status(drive, "media error "
395 "(bad sector)", stat);
396 do_end_request = 1;
397 break;
398 case BLANK_CHECK:
399 /* disk appears blank? */
400 if (!blk_rq_quiet(rq))
401 ide_dump_status(drive, "media error (blank)",
402 stat);
403 do_end_request = 1;
404 break;
405 default:
406 if (blk_fs_request(rq) == 0)
407 break;
408 if (err & ~ATA_ABORTED) {
409 /* go to the default handler for other errors */
410 ide_error(drive, "cdrom_decode_status", stat);
411 return 1;
412 } else if (++rq->errors > ERROR_MAX)
413 /* we've racked up too many retries, abort */
414 do_end_request = 1;
415 }
416
417 if (blk_fs_request(rq) == 0) {
418 rq->cmd_flags |= REQ_FAILED;
419 do_end_request = 1;
420 }
421
422 /*
423 * End a request through request sense analysis when we have sense data.
424 * We need this in order to perform end of media processing.
425 */
426 if (do_end_request)
427 goto end_request;
428
429 /* if we got a CHECK_CONDITION status, queue a request sense command */
430 if (stat & ATA_ERR)
431 cdrom_queue_request_sense(drive, NULL, NULL);
432 return 1;
433
434 end_request:
435 if (stat & ATA_ERR) {
436 struct request_queue *q = drive->queue;
437 unsigned long flags;
438
439 spin_lock_irqsave(q->queue_lock, flags);
440 blkdev_dequeue_request(rq);
441 spin_unlock_irqrestore(q->queue_lock, flags);
442
443 hwif->rq = NULL;
444
445 cdrom_queue_request_sense(drive, rq->sense, rq);
446 return 1;
447 } else
448 return 2;
449 }
450
451 /*
452 * Check the contents of the interrupt reason register from the cdrom
453 * and attempt to recover if there are problems. Returns 0 if everything's
454 * ok; nonzero if the request has been terminated.
455 */
456 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
457 int len, int ireason, int rw)
458 {
459 ide_hwif_t *hwif = drive->hwif;
460
461 ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
462
463 /*
464 * ireason == 0: the drive wants to receive data from us
465 * ireason == 2: the drive is expecting to transfer data to us
466 */
467 if (ireason == (!rw << 1))
468 return 0;
469 else if (ireason == (rw << 1)) {
470
471 /* whoops... */
472 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
473 drive->name, __func__);
474
475 ide_pad_transfer(drive, rw, len);
476 } else if (rw == 0 && ireason == 1) {
477 /*
478 * Some drives (ASUS) seem to tell us that status info is
479 * available. Just get it and ignore.
480 */
481 (void)hwif->tp_ops->read_status(hwif);
482 return 0;
483 } else {
484 /* drive wants a command packet, or invalid ireason... */
485 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
486 drive->name, __func__, ireason);
487 }
488
489 if (rq->cmd_type == REQ_TYPE_ATA_PC)
490 rq->cmd_flags |= REQ_FAILED;
491
492 return -1;
493 }
494
495 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
496 {
497 struct request *rq = cmd->rq;
498
499 ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
500
501 /*
502 * Some of the trailing request sense fields are optional,
503 * and some drives don't send them. Sigh.
504 */
505 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
506 cmd->nleft > 0 && cmd->nleft <= 5) {
507 unsigned int ofs = cmd->nbytes - cmd->nleft;
508
509 while (cmd->nleft > 0) {
510 *((u8 *)rq->data + ofs++) = 0;
511 cmd->nleft--;
512 }
513 }
514 }
515
516 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
517 int write, void *buffer, unsigned *bufflen,
518 struct request_sense *sense, int timeout,
519 unsigned int cmd_flags)
520 {
521 struct cdrom_info *info = drive->driver_data;
522 struct request_sense local_sense;
523 int retries = 10;
524 unsigned int flags = 0;
525
526 if (!sense)
527 sense = &local_sense;
528
529 ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
530 "cmd_flags: 0x%x",
531 cmd[0], write, timeout, cmd_flags);
532
533 /* start of retry loop */
534 do {
535 struct request *rq;
536 int error;
537
538 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
539
540 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
541 rq->cmd_type = REQ_TYPE_ATA_PC;
542 rq->sense = sense;
543 rq->cmd_flags |= cmd_flags;
544 rq->timeout = timeout;
545 if (buffer) {
546 rq->data = buffer;
547 rq->data_len = *bufflen;
548 }
549
550 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
551
552 if (buffer)
553 *bufflen = rq->data_len;
554
555 flags = rq->cmd_flags;
556 blk_put_request(rq);
557
558 /*
559 * FIXME: we should probably abort/retry or something in case of
560 * failure.
561 */
562 if (flags & REQ_FAILED) {
563 /*
564 * The request failed. Retry if it was due to a unit
565 * attention status (usually means media was changed).
566 */
567 struct request_sense *reqbuf = sense;
568
569 if (reqbuf->sense_key == UNIT_ATTENTION)
570 cdrom_saw_media_change(drive);
571 else if (reqbuf->sense_key == NOT_READY &&
572 reqbuf->asc == 4 && reqbuf->ascq != 4) {
573 /*
574 * The drive is in the process of loading
575 * a disk. Retry, but wait a little to give
576 * the drive time to complete the load.
577 */
578 ssleep(2);
579 } else {
580 /* otherwise, don't retry */
581 retries = 0;
582 }
583 --retries;
584 }
585
586 /* end of retry loop */
587 } while ((flags & REQ_FAILED) && retries >= 0);
588
589 /* return an error if the command failed */
590 return (flags & REQ_FAILED) ? -EIO : 0;
591 }
592
593 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
594 {
595 unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
596
597 if (cmd->tf_flags & IDE_TFLAG_WRITE)
598 nr_bytes -= cmd->last_xfer_len;
599
600 if (nr_bytes > 0)
601 ide_complete_rq(drive, 0, nr_bytes);
602 }
603
604 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
605 {
606 ide_hwif_t *hwif = drive->hwif;
607 struct ide_cmd *cmd = &hwif->cmd;
608 struct request *rq = hwif->rq;
609 ide_expiry_t *expiry = NULL;
610 int dma_error = 0, dma, thislen, uptodate = 0;
611 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
612 int sense = blk_sense_request(rq);
613 unsigned int timeout;
614 u16 len;
615 u8 ireason, stat;
616
617 ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
618
619 /* check for errors */
620 dma = drive->dma;
621 if (dma) {
622 drive->dma = 0;
623 drive->waiting_for_dma = 0;
624 dma_error = hwif->dma_ops->dma_end(drive);
625 ide_dma_unmap_sg(drive, cmd);
626 if (dma_error) {
627 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
628 write ? "write" : "read");
629 ide_dma_off(drive);
630 }
631 }
632
633 /* check status */
634 stat = hwif->tp_ops->read_status(hwif);
635
636 if (!OK_STAT(stat, 0, BAD_R_STAT)) {
637 rc = cdrom_decode_status(drive, stat);
638 if (rc) {
639 if (rc == 2)
640 goto out_end;
641 return ide_stopped;
642 }
643 }
644
645 /* using dma, transfer is complete now */
646 if (dma) {
647 if (dma_error)
648 return ide_error(drive, "dma error", stat);
649 uptodate = 1;
650 goto out_end;
651 }
652
653 ide_read_bcount_and_ireason(drive, &len, &ireason);
654
655 thislen = blk_fs_request(rq) ? len : cmd->nleft;
656 if (thislen > len)
657 thislen = len;
658
659 ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
660 stat, thislen);
661
662 /* If DRQ is clear, the command has completed. */
663 if ((stat & ATA_DRQ) == 0) {
664 if (blk_fs_request(rq)) {
665 /*
666 * If we're not done reading/writing, complain.
667 * Otherwise, complete the command normally.
668 */
669 uptodate = 1;
670 if (cmd->nleft > 0) {
671 printk(KERN_ERR PFX "%s: %s: data underrun "
672 "(%u bytes)\n", drive->name, __func__,
673 cmd->nleft);
674 if (!write)
675 rq->cmd_flags |= REQ_FAILED;
676 uptodate = 0;
677 }
678 } else if (!blk_pc_request(rq)) {
679 ide_cd_request_sense_fixup(drive, cmd);
680 /* complain if we still have data left to transfer */
681 uptodate = cmd->nleft ? 0 : 1;
682 if (uptodate == 0)
683 rq->cmd_flags |= REQ_FAILED;
684 }
685 goto out_end;
686 }
687
688 /* check which way to transfer data */
689 rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
690 if (rc)
691 goto out_end;
692
693 cmd->last_xfer_len = 0;
694
695 ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
696 "ireason: 0x%x",
697 rq->cmd_type, ireason);
698
699 /* transfer data */
700 while (thislen > 0) {
701 int blen = min_t(int, thislen, cmd->nleft);
702
703 if (cmd->nleft == 0)
704 break;
705
706 ide_pio_bytes(drive, cmd, write, blen);
707 cmd->last_xfer_len += blen;
708
709 thislen -= blen;
710 len -= blen;
711
712 if (sense && write == 0)
713 rq->sense_len += blen;
714 }
715
716 /* pad, if necessary */
717 if (len > 0) {
718 if (blk_fs_request(rq) == 0 || write == 0)
719 ide_pad_transfer(drive, write, len);
720 else {
721 printk(KERN_ERR PFX "%s: confused, missing data\n",
722 drive->name);
723 blk_dump_rq_flags(rq, "cdrom_newpc_intr");
724 }
725 }
726
727 if (blk_pc_request(rq)) {
728 timeout = rq->timeout;
729 } else {
730 timeout = ATAPI_WAIT_PC;
731 if (!blk_fs_request(rq))
732 expiry = ide_cd_expiry;
733 }
734
735 hwif->expiry = expiry;
736 ide_set_handler(drive, cdrom_newpc_intr, timeout);
737 return ide_started;
738
739 out_end:
740 if (blk_pc_request(rq) && rc == 0) {
741 unsigned int dlen = rq->data_len;
742
743 rq->data_len = 0;
744
745 if (blk_end_request(rq, 0, dlen))
746 BUG();
747
748 hwif->rq = NULL;
749 } else {
750 if (sense && uptodate)
751 ide_cd_complete_failed_rq(drive, rq);
752
753 if (blk_fs_request(rq)) {
754 if (cmd->nleft == 0)
755 uptodate = 1;
756 } else {
757 if (uptodate <= 0 && rq->errors == 0)
758 rq->errors = -EIO;
759 }
760
761 if (uptodate == 0 && rq->bio)
762 ide_cd_error_cmd(drive, cmd);
763
764 /* make sure it's fully ended */
765 if (blk_pc_request(rq))
766 nsectors = (rq->data_len + 511) >> 9;
767 else
768 nsectors = rq->hard_nr_sectors;
769
770 if (nsectors == 0)
771 nsectors = 1;
772
773 if (blk_fs_request(rq) == 0) {
774 rq->data_len -= (cmd->nbytes - cmd->nleft);
775 if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
776 rq->data_len += cmd->last_xfer_len;
777 }
778
779 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
780
781 if (sense && rc == 2)
782 ide_error(drive, "request sense failure", stat);
783 }
784 return ide_stopped;
785 }
786
787 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
788 {
789 struct cdrom_info *cd = drive->driver_data;
790 struct request_queue *q = drive->queue;
791 int write = rq_data_dir(rq) == WRITE;
792 unsigned short sectors_per_frame =
793 queue_hardsect_size(q) >> SECTOR_BITS;
794
795 ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
796 "secs_per_frame: %u",
797 rq->cmd[0], rq->cmd_flags, sectors_per_frame);
798
799 if (write) {
800 /* disk has become write protected */
801 if (get_disk_ro(cd->disk))
802 return ide_stopped;
803 } else {
804 /*
805 * We may be retrying this request after an error. Fix up any
806 * weirdness which might be present in the request packet.
807 */
808 q->prep_rq_fn(q, rq);
809 }
810
811 /* fs requests *must* be hardware frame aligned */
812 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
813 (rq->sector & (sectors_per_frame - 1)))
814 return ide_stopped;
815
816 /* use DMA, if possible */
817 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
818
819 if (write)
820 cd->devinfo.media_written = 1;
821
822 rq->timeout = ATAPI_WAIT_PC;
823
824 return ide_started;
825 }
826
827 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
828 {
829
830 ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
831 rq->cmd[0], rq->cmd_type);
832
833 if (blk_pc_request(rq))
834 rq->cmd_flags |= REQ_QUIET;
835 else
836 rq->cmd_flags &= ~REQ_FAILED;
837
838 drive->dma = 0;
839
840 /* sg request */
841 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
842 struct request_queue *q = drive->queue;
843 unsigned int alignment;
844 char *buf;
845
846 if (rq->bio)
847 buf = bio_data(rq->bio);
848 else
849 buf = rq->data;
850
851 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
852
853 /*
854 * check if dma is safe
855 *
856 * NOTE! The "len" and "addr" checks should possibly have
857 * separate masks.
858 */
859 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
860 if ((unsigned long)buf & alignment
861 || rq->data_len & q->dma_pad_mask
862 || object_is_on_stack(buf))
863 drive->dma = 0;
864 }
865 }
866
867 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
868 sector_t block)
869 {
870 struct ide_cmd cmd;
871 int uptodate = 0, nsectors;
872
873 ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
874 rq->cmd[0], (unsigned long long)block);
875
876 if (drive->debug_mask & IDE_DBG_RQ)
877 blk_dump_rq_flags(rq, "ide_cd_do_request");
878
879 if (blk_fs_request(rq)) {
880 if (cdrom_start_rw(drive, rq) == ide_stopped)
881 goto out_end;
882 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
883 rq->cmd_type == REQ_TYPE_ATA_PC) {
884 if (!rq->timeout)
885 rq->timeout = ATAPI_WAIT_PC;
886
887 cdrom_do_block_pc(drive, rq);
888 } else if (blk_special_request(rq)) {
889 /* right now this can only be a reset... */
890 uptodate = 1;
891 goto out_end;
892 } else {
893 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
894 if (rq->errors == 0)
895 rq->errors = -EIO;
896 goto out_end;
897 }
898
899 memset(&cmd, 0, sizeof(cmd));
900
901 if (rq_data_dir(rq))
902 cmd.tf_flags |= IDE_TFLAG_WRITE;
903
904 cmd.rq = rq;
905
906 if (blk_fs_request(rq) || rq->data_len) {
907 ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
908 : rq->data_len);
909 ide_map_sg(drive, &cmd);
910 }
911
912 return ide_issue_pc(drive, &cmd);
913 out_end:
914 nsectors = rq->hard_nr_sectors;
915
916 if (nsectors == 0)
917 nsectors = 1;
918
919 ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
920
921 return ide_stopped;
922 }
923
924 /*
925 * Ioctl handling.
926 *
927 * Routines which queue packet commands take as a final argument a pointer to a
928 * request_sense struct. If execution of the command results in an error with a
929 * CHECK CONDITION status, this structure will be filled with the results of the
930 * subsequent request sense command. The pointer can also be NULL, in which case
931 * no sense information is returned.
932 */
933 static void msf_from_bcd(struct atapi_msf *msf)
934 {
935 msf->minute = bcd2bin(msf->minute);
936 msf->second = bcd2bin(msf->second);
937 msf->frame = bcd2bin(msf->frame);
938 }
939
940 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
941 {
942 struct cdrom_info *info = drive->driver_data;
943 struct cdrom_device_info *cdi = &info->devinfo;
944 unsigned char cmd[BLK_MAX_CDB];
945
946 ide_debug_log(IDE_DBG_FUNC, "enter");
947
948 memset(cmd, 0, BLK_MAX_CDB);
949 cmd[0] = GPCMD_TEST_UNIT_READY;
950
951 /*
952 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
953 * instead of supporting the LOAD_UNLOAD opcode.
954 */
955 cmd[7] = cdi->sanyo_slot % 3;
956
957 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
958 }
959
960 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
961 unsigned long *sectors_per_frame,
962 struct request_sense *sense)
963 {
964 struct {
965 __be32 lba;
966 __be32 blocklen;
967 } capbuf;
968
969 int stat;
970 unsigned char cmd[BLK_MAX_CDB];
971 unsigned len = sizeof(capbuf);
972 u32 blocklen;
973
974 ide_debug_log(IDE_DBG_FUNC, "enter");
975
976 memset(cmd, 0, BLK_MAX_CDB);
977 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
978
979 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
980 REQ_QUIET);
981 if (stat)
982 return stat;
983
984 /*
985 * Sanity check the given block size
986 */
987 blocklen = be32_to_cpu(capbuf.blocklen);
988 switch (blocklen) {
989 case 512:
990 case 1024:
991 case 2048:
992 case 4096:
993 break;
994 default:
995 printk(KERN_ERR PFX "%s: weird block size %u\n",
996 drive->name, blocklen);
997 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
998 drive->name);
999 blocklen = 2048;
1000 break;
1001 }
1002
1003 *capacity = 1 + be32_to_cpu(capbuf.lba);
1004 *sectors_per_frame = blocklen >> SECTOR_BITS;
1005
1006 ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
1007 *capacity, *sectors_per_frame);
1008
1009 return 0;
1010 }
1011
1012 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1013 int format, char *buf, int buflen,
1014 struct request_sense *sense)
1015 {
1016 unsigned char cmd[BLK_MAX_CDB];
1017
1018 ide_debug_log(IDE_DBG_FUNC, "enter");
1019
1020 memset(cmd, 0, BLK_MAX_CDB);
1021
1022 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1023 cmd[6] = trackno;
1024 cmd[7] = (buflen >> 8);
1025 cmd[8] = (buflen & 0xff);
1026 cmd[9] = (format << 6);
1027
1028 if (msf_flag)
1029 cmd[1] = 2;
1030
1031 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1032 }
1033
1034 /* Try to read the entire TOC for the disk into our internal buffer. */
1035 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1036 {
1037 int stat, ntracks, i;
1038 struct cdrom_info *info = drive->driver_data;
1039 struct cdrom_device_info *cdi = &info->devinfo;
1040 struct atapi_toc *toc = info->toc;
1041 struct {
1042 struct atapi_toc_header hdr;
1043 struct atapi_toc_entry ent;
1044 } ms_tmp;
1045 long last_written;
1046 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1047
1048 ide_debug_log(IDE_DBG_FUNC, "enter");
1049
1050 if (toc == NULL) {
1051 /* try to allocate space */
1052 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1053 if (toc == NULL) {
1054 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1055 drive->name);
1056 return -ENOMEM;
1057 }
1058 info->toc = toc;
1059 }
1060
1061 /*
1062 * Check to see if the existing data is still valid. If it is,
1063 * just return.
1064 */
1065 (void) cdrom_check_status(drive, sense);
1066
1067 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1068 return 0;
1069
1070 /* try to get the total cdrom capacity and sector size */
1071 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1072 sense);
1073 if (stat)
1074 toc->capacity = 0x1fffff;
1075
1076 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1077 /* save a private copy of the TOC capacity for error handling */
1078 drive->probed_capacity = toc->capacity * sectors_per_frame;
1079
1080 blk_queue_hardsect_size(drive->queue,
1081 sectors_per_frame << SECTOR_BITS);
1082
1083 /* first read just the header, so we know how long the TOC is */
1084 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1085 sizeof(struct atapi_toc_header), sense);
1086 if (stat)
1087 return stat;
1088
1089 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1090 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1091 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1092 }
1093
1094 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1095 if (ntracks <= 0)
1096 return -EIO;
1097 if (ntracks > MAX_TRACKS)
1098 ntracks = MAX_TRACKS;
1099
1100 /* now read the whole schmeer */
1101 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1102 (char *)&toc->hdr,
1103 sizeof(struct atapi_toc_header) +
1104 (ntracks + 1) *
1105 sizeof(struct atapi_toc_entry), sense);
1106
1107 if (stat && toc->hdr.first_track > 1) {
1108 /*
1109 * Cds with CDI tracks only don't have any TOC entries, despite
1110 * of this the returned values are
1111 * first_track == last_track = number of CDI tracks + 1,
1112 * so that this case is indistinguishable from the same layout
1113 * plus an additional audio track. If we get an error for the
1114 * regular case, we assume a CDI without additional audio
1115 * tracks. In this case the readable TOC is empty (CDI tracks
1116 * are not included) and only holds the Leadout entry.
1117 *
1118 * Heiko Eißfeldt.
1119 */
1120 ntracks = 0;
1121 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1122 (char *)&toc->hdr,
1123 sizeof(struct atapi_toc_header) +
1124 (ntracks + 1) *
1125 sizeof(struct atapi_toc_entry),
1126 sense);
1127 if (stat)
1128 return stat;
1129
1130 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1131 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1132 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1133 } else {
1134 toc->hdr.first_track = CDROM_LEADOUT;
1135 toc->hdr.last_track = CDROM_LEADOUT;
1136 }
1137 }
1138
1139 if (stat)
1140 return stat;
1141
1142 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1143
1144 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1145 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1146 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1147 }
1148
1149 for (i = 0; i <= ntracks; i++) {
1150 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1151 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1152 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1153 msf_from_bcd(&toc->ent[i].addr.msf);
1154 }
1155 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1156 toc->ent[i].addr.msf.second,
1157 toc->ent[i].addr.msf.frame);
1158 }
1159
1160 if (toc->hdr.first_track != CDROM_LEADOUT) {
1161 /* read the multisession information */
1162 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1163 sizeof(ms_tmp), sense);
1164 if (stat)
1165 return stat;
1166
1167 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1168 } else {
1169 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1170 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1171 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1172 }
1173
1174 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1175 /* re-read multisession information using MSF format */
1176 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1177 sizeof(ms_tmp), sense);
1178 if (stat)
1179 return stat;
1180
1181 msf_from_bcd(&ms_tmp.ent.addr.msf);
1182 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1183 ms_tmp.ent.addr.msf.second,
1184 ms_tmp.ent.addr.msf.frame);
1185 }
1186
1187 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1188
1189 /* now try to get the total cdrom capacity */
1190 stat = cdrom_get_last_written(cdi, &last_written);
1191 if (!stat && (last_written > toc->capacity)) {
1192 toc->capacity = last_written;
1193 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1194 drive->probed_capacity = toc->capacity * sectors_per_frame;
1195 }
1196
1197 /* Remember that we've read this stuff. */
1198 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1199
1200 return 0;
1201 }
1202
1203 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1204 {
1205 struct cdrom_info *info = drive->driver_data;
1206 struct cdrom_device_info *cdi = &info->devinfo;
1207 struct packet_command cgc;
1208 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1209
1210 ide_debug_log(IDE_DBG_FUNC, "enter");
1211
1212 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1213 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1214
1215 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1216 do {
1217 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1218 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1219 if (!stat)
1220 break;
1221 } while (--attempts);
1222 return stat;
1223 }
1224
1225 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1226 {
1227 struct cdrom_info *cd = drive->driver_data;
1228 u16 curspeed, maxspeed;
1229
1230 ide_debug_log(IDE_DBG_FUNC, "enter");
1231
1232 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1233 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1234 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1235 } else {
1236 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1237 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1238 }
1239
1240 ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1241 curspeed, maxspeed);
1242
1243 cd->current_speed = (curspeed + (176/2)) / 176;
1244 cd->max_speed = (maxspeed + (176/2)) / 176;
1245 }
1246
1247 #define IDE_CD_CAPABILITIES \
1248 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1249 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1250 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1251 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1252 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1253
1254 static struct cdrom_device_ops ide_cdrom_dops = {
1255 .open = ide_cdrom_open_real,
1256 .release = ide_cdrom_release_real,
1257 .drive_status = ide_cdrom_drive_status,
1258 .media_changed = ide_cdrom_check_media_change_real,
1259 .tray_move = ide_cdrom_tray_move,
1260 .lock_door = ide_cdrom_lock_door,
1261 .select_speed = ide_cdrom_select_speed,
1262 .get_last_session = ide_cdrom_get_last_session,
1263 .get_mcn = ide_cdrom_get_mcn,
1264 .reset = ide_cdrom_reset,
1265 .audio_ioctl = ide_cdrom_audio_ioctl,
1266 .capability = IDE_CD_CAPABILITIES,
1267 .generic_packet = ide_cdrom_packet,
1268 };
1269
1270 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1271 {
1272 struct cdrom_info *info = drive->driver_data;
1273 struct cdrom_device_info *devinfo = &info->devinfo;
1274
1275 ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1276
1277 devinfo->ops = &ide_cdrom_dops;
1278 devinfo->speed = info->current_speed;
1279 devinfo->capacity = nslots;
1280 devinfo->handle = drive;
1281 strcpy(devinfo->name, drive->name);
1282
1283 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1284 devinfo->mask |= CDC_SELECT_SPEED;
1285
1286 devinfo->disk = info->disk;
1287 return register_cdrom(devinfo);
1288 }
1289
1290 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1291 {
1292 struct cdrom_info *cd = drive->driver_data;
1293 struct cdrom_device_info *cdi = &cd->devinfo;
1294 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1295 mechtype_t mechtype;
1296 int nslots = 1;
1297
1298 ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1299 drive->media, drive->atapi_flags);
1300
1301 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1302 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1303 CDC_MO_DRIVE | CDC_RAM);
1304
1305 if (drive->media == ide_optical) {
1306 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1307 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1308 drive->name);
1309 return nslots;
1310 }
1311
1312 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1313 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1314 cdi->mask &= ~CDC_PLAY_AUDIO;
1315 return nslots;
1316 }
1317
1318 /*
1319 * We have to cheat a little here. the packet will eventually be queued
1320 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1321 * Since this device hasn't been registered with the Uniform layer yet,
1322 * it can't do this. Same goes for cdi->ops.
1323 */
1324 cdi->handle = drive;
1325 cdi->ops = &ide_cdrom_dops;
1326
1327 if (ide_cdrom_get_capabilities(drive, buf))
1328 return 0;
1329
1330 if ((buf[8 + 6] & 0x01) == 0)
1331 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1332 if (buf[8 + 6] & 0x08)
1333 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1334 if (buf[8 + 3] & 0x01)
1335 cdi->mask &= ~CDC_CD_R;
1336 if (buf[8 + 3] & 0x02)
1337 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1338 if (buf[8 + 2] & 0x38)
1339 cdi->mask &= ~CDC_DVD;
1340 if (buf[8 + 3] & 0x20)
1341 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1342 if (buf[8 + 3] & 0x10)
1343 cdi->mask &= ~CDC_DVD_R;
1344 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1345 cdi->mask &= ~CDC_PLAY_AUDIO;
1346
1347 mechtype = buf[8 + 6] >> 5;
1348 if (mechtype == mechtype_caddy ||
1349 mechtype == mechtype_popup ||
1350 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1351 cdi->mask |= CDC_CLOSE_TRAY;
1352
1353 if (cdi->sanyo_slot > 0) {
1354 cdi->mask &= ~CDC_SELECT_DISC;
1355 nslots = 3;
1356 } else if (mechtype == mechtype_individual_changer ||
1357 mechtype == mechtype_cartridge_changer) {
1358 nslots = cdrom_number_of_slots(cdi);
1359 if (nslots > 1)
1360 cdi->mask &= ~CDC_SELECT_DISC;
1361 }
1362
1363 ide_cdrom_update_speed(drive, buf);
1364
1365 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1366
1367 /* don't print speed if the drive reported 0 */
1368 if (cd->max_speed)
1369 printk(KERN_CONT " %dX", cd->max_speed);
1370
1371 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1372
1373 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1374 printk(KERN_CONT " DVD%s%s",
1375 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1376 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1377
1378 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1379 printk(KERN_CONT " CD%s%s",
1380 (cdi->mask & CDC_CD_R) ? "" : "-R",
1381 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1382
1383 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1384 printk(KERN_CONT " changer w/%d slots", nslots);
1385 else
1386 printk(KERN_CONT " drive");
1387
1388 printk(KERN_CONT ", %dkB Cache\n",
1389 be16_to_cpup((__be16 *)&buf[8 + 12]));
1390
1391 return nslots;
1392 }
1393
1394 /* standard prep_rq_fn that builds 10 byte cmds */
1395 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1396 {
1397 int hard_sect = queue_hardsect_size(q);
1398 long block = (long)rq->hard_sector / (hard_sect >> 9);
1399 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1400
1401 memset(rq->cmd, 0, BLK_MAX_CDB);
1402
1403 if (rq_data_dir(rq) == READ)
1404 rq->cmd[0] = GPCMD_READ_10;
1405 else
1406 rq->cmd[0] = GPCMD_WRITE_10;
1407
1408 /*
1409 * fill in lba
1410 */
1411 rq->cmd[2] = (block >> 24) & 0xff;
1412 rq->cmd[3] = (block >> 16) & 0xff;
1413 rq->cmd[4] = (block >> 8) & 0xff;
1414 rq->cmd[5] = block & 0xff;
1415
1416 /*
1417 * and transfer length
1418 */
1419 rq->cmd[7] = (blocks >> 8) & 0xff;
1420 rq->cmd[8] = blocks & 0xff;
1421 rq->cmd_len = 10;
1422 return BLKPREP_OK;
1423 }
1424
1425 /*
1426 * Most of the SCSI commands are supported directly by ATAPI devices.
1427 * This transform handles the few exceptions.
1428 */
1429 static int ide_cdrom_prep_pc(struct request *rq)
1430 {
1431 u8 *c = rq->cmd;
1432
1433 /* transform 6-byte read/write commands to the 10-byte version */
1434 if (c[0] == READ_6 || c[0] == WRITE_6) {
1435 c[8] = c[4];
1436 c[5] = c[3];
1437 c[4] = c[2];
1438 c[3] = c[1] & 0x1f;
1439 c[2] = 0;
1440 c[1] &= 0xe0;
1441 c[0] += (READ_10 - READ_6);
1442 rq->cmd_len = 10;
1443 return BLKPREP_OK;
1444 }
1445
1446 /*
1447 * it's silly to pretend we understand 6-byte sense commands, just
1448 * reject with ILLEGAL_REQUEST and the caller should take the
1449 * appropriate action
1450 */
1451 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1452 rq->errors = ILLEGAL_REQUEST;
1453 return BLKPREP_KILL;
1454 }
1455
1456 return BLKPREP_OK;
1457 }
1458
1459 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1460 {
1461 if (blk_fs_request(rq))
1462 return ide_cdrom_prep_fs(q, rq);
1463 else if (blk_pc_request(rq))
1464 return ide_cdrom_prep_pc(rq);
1465
1466 return 0;
1467 }
1468
1469 struct cd_list_entry {
1470 const char *id_model;
1471 const char *id_firmware;
1472 unsigned int cd_flags;
1473 };
1474
1475 #ifdef CONFIG_IDE_PROC_FS
1476 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1477 {
1478 unsigned long capacity, sectors_per_frame;
1479
1480 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1481 return 0;
1482
1483 return capacity * sectors_per_frame;
1484 }
1485
1486 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1487 int count, int *eof, void *data)
1488 {
1489 ide_drive_t *drive = data;
1490 int len;
1491
1492 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1493 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1494 }
1495
1496 static ide_proc_entry_t idecd_proc[] = {
1497 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1498 { NULL, 0, NULL, NULL }
1499 };
1500
1501 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1502 {
1503 return idecd_proc;
1504 }
1505
1506 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1507 {
1508 return NULL;
1509 }
1510 #endif
1511
1512 static const struct cd_list_entry ide_cd_quirks_list[] = {
1513 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1514 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1515 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1516 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1517 IDE_AFLAG_PRE_ATAPI12, },
1518 /* Vertos 300, some versions of this drive like to talk BCD. */
1519 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1520 /* Vertos 600 ESD. */
1521 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1522 /*
1523 * Sanyo 3 CD changer uses a non-standard command for CD changing
1524 * (by default standard ATAPI support for CD changers is used).
1525 */
1526 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1527 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1528 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1529 /* Stingray 8X CD-ROM. */
1530 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1531 /*
1532 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1533 * mode sense page capabilities size, but older drives break.
1534 */
1535 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1536 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1537 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1538 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1539 /*
1540 * Some drives used by Apple don't advertise audio play
1541 * but they do support reading TOC & audio datas.
1542 */
1543 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1544 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1545 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1546 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1547 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1548 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1549 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1550 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1551 { NULL, NULL, 0 }
1552 };
1553
1554 static unsigned int ide_cd_flags(u16 *id)
1555 {
1556 const struct cd_list_entry *cle = ide_cd_quirks_list;
1557
1558 while (cle->id_model) {
1559 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1560 (cle->id_firmware == NULL ||
1561 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1562 return cle->cd_flags;
1563 cle++;
1564 }
1565
1566 return 0;
1567 }
1568
1569 static int ide_cdrom_setup(ide_drive_t *drive)
1570 {
1571 struct cdrom_info *cd = drive->driver_data;
1572 struct cdrom_device_info *cdi = &cd->devinfo;
1573 struct request_queue *q = drive->queue;
1574 u16 *id = drive->id;
1575 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1576 int nslots;
1577
1578 ide_debug_log(IDE_DBG_PROBE, "enter");
1579
1580 blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1581 blk_queue_dma_alignment(q, 31);
1582 blk_queue_update_dma_pad(q, 15);
1583
1584 q->unplug_delay = max((1 * HZ) / 1000, 1);
1585
1586 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1587 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1588
1589 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1590 fw_rev[4] == '1' && fw_rev[6] <= '2')
1591 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1592 IDE_AFLAG_TOCADDR_AS_BCD);
1593 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1594 fw_rev[4] == '1' && fw_rev[6] <= '2')
1595 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1596 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1597 /* 3 => use CD in slot 0 */
1598 cdi->sanyo_slot = 3;
1599
1600 nslots = ide_cdrom_probe_capabilities(drive);
1601
1602 blk_queue_hardsect_size(q, CD_FRAMESIZE);
1603
1604 if (ide_cdrom_register(drive, nslots)) {
1605 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1606 " cdrom driver.\n", drive->name, __func__);
1607 cd->devinfo.handle = NULL;
1608 return 1;
1609 }
1610
1611 ide_proc_register_driver(drive, cd->driver);
1612 return 0;
1613 }
1614
1615 static void ide_cd_remove(ide_drive_t *drive)
1616 {
1617 struct cdrom_info *info = drive->driver_data;
1618
1619 ide_debug_log(IDE_DBG_FUNC, "enter");
1620
1621 ide_proc_unregister_driver(drive, info->driver);
1622 device_del(&info->dev);
1623 del_gendisk(info->disk);
1624
1625 mutex_lock(&idecd_ref_mutex);
1626 put_device(&info->dev);
1627 mutex_unlock(&idecd_ref_mutex);
1628 }
1629
1630 static void ide_cd_release(struct device *dev)
1631 {
1632 struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1633 struct cdrom_device_info *devinfo = &info->devinfo;
1634 ide_drive_t *drive = info->drive;
1635 struct gendisk *g = info->disk;
1636
1637 ide_debug_log(IDE_DBG_FUNC, "enter");
1638
1639 kfree(info->toc);
1640 if (devinfo->handle == drive)
1641 unregister_cdrom(devinfo);
1642 drive->driver_data = NULL;
1643 blk_queue_prep_rq(drive->queue, NULL);
1644 g->private_data = NULL;
1645 put_disk(g);
1646 kfree(info);
1647 }
1648
1649 static int ide_cd_probe(ide_drive_t *);
1650
1651 static struct ide_driver ide_cdrom_driver = {
1652 .gen_driver = {
1653 .owner = THIS_MODULE,
1654 .name = "ide-cdrom",
1655 .bus = &ide_bus_type,
1656 },
1657 .probe = ide_cd_probe,
1658 .remove = ide_cd_remove,
1659 .version = IDECD_VERSION,
1660 .do_request = ide_cd_do_request,
1661 #ifdef CONFIG_IDE_PROC_FS
1662 .proc_entries = ide_cd_proc_entries,
1663 .proc_devsets = ide_cd_proc_devsets,
1664 #endif
1665 };
1666
1667 static int idecd_open(struct block_device *bdev, fmode_t mode)
1668 {
1669 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1670 int rc = -ENOMEM;
1671
1672 if (!info)
1673 return -ENXIO;
1674
1675 rc = cdrom_open(&info->devinfo, bdev, mode);
1676
1677 if (rc < 0)
1678 ide_cd_put(info);
1679
1680 return rc;
1681 }
1682
1683 static int idecd_release(struct gendisk *disk, fmode_t mode)
1684 {
1685 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1686
1687 cdrom_release(&info->devinfo, mode);
1688
1689 ide_cd_put(info);
1690
1691 return 0;
1692 }
1693
1694 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1695 {
1696 struct packet_command cgc;
1697 char buffer[16];
1698 int stat;
1699 char spindown;
1700
1701 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1702 return -EFAULT;
1703
1704 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1705
1706 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1707 if (stat)
1708 return stat;
1709
1710 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1711 return cdrom_mode_select(cdi, &cgc);
1712 }
1713
1714 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1715 {
1716 struct packet_command cgc;
1717 char buffer[16];
1718 int stat;
1719 char spindown;
1720
1721 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1722
1723 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1724 if (stat)
1725 return stat;
1726
1727 spindown = buffer[11] & 0x0f;
1728 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1729 return -EFAULT;
1730 return 0;
1731 }
1732
1733 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1734 unsigned int cmd, unsigned long arg)
1735 {
1736 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1737 int err;
1738
1739 switch (cmd) {
1740 case CDROMSETSPINDOWN:
1741 return idecd_set_spindown(&info->devinfo, arg);
1742 case CDROMGETSPINDOWN:
1743 return idecd_get_spindown(&info->devinfo, arg);
1744 default:
1745 break;
1746 }
1747
1748 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1749 if (err == -EINVAL)
1750 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1751
1752 return err;
1753 }
1754
1755 static int idecd_media_changed(struct gendisk *disk)
1756 {
1757 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1758 return cdrom_media_changed(&info->devinfo);
1759 }
1760
1761 static int idecd_revalidate_disk(struct gendisk *disk)
1762 {
1763 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1764 struct request_sense sense;
1765
1766 ide_cd_read_toc(info->drive, &sense);
1767
1768 return 0;
1769 }
1770
1771 static struct block_device_operations idecd_ops = {
1772 .owner = THIS_MODULE,
1773 .open = idecd_open,
1774 .release = idecd_release,
1775 .locked_ioctl = idecd_ioctl,
1776 .media_changed = idecd_media_changed,
1777 .revalidate_disk = idecd_revalidate_disk
1778 };
1779
1780 /* module options */
1781 static unsigned long debug_mask;
1782 module_param(debug_mask, ulong, 0644);
1783
1784 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1785
1786 static int ide_cd_probe(ide_drive_t *drive)
1787 {
1788 struct cdrom_info *info;
1789 struct gendisk *g;
1790 struct request_sense sense;
1791
1792 ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1793 drive->driver_req, drive->media);
1794
1795 if (!strstr("ide-cdrom", drive->driver_req))
1796 goto failed;
1797
1798 if (drive->media != ide_cdrom && drive->media != ide_optical)
1799 goto failed;
1800
1801 drive->debug_mask = debug_mask;
1802 drive->irq_handler = cdrom_newpc_intr;
1803
1804 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1805 if (info == NULL) {
1806 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1807 drive->name);
1808 goto failed;
1809 }
1810
1811 g = alloc_disk(1 << PARTN_BITS);
1812 if (!g)
1813 goto out_free_cd;
1814
1815 ide_init_disk(g, drive);
1816
1817 info->dev.parent = &drive->gendev;
1818 info->dev.release = ide_cd_release;
1819 dev_set_name(&info->dev, dev_name(&drive->gendev));
1820
1821 if (device_register(&info->dev))
1822 goto out_free_disk;
1823
1824 info->drive = drive;
1825 info->driver = &ide_cdrom_driver;
1826 info->disk = g;
1827
1828 g->private_data = &info->driver;
1829
1830 drive->driver_data = info;
1831
1832 g->minors = 1;
1833 g->driverfs_dev = &drive->gendev;
1834 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1835 if (ide_cdrom_setup(drive)) {
1836 put_device(&info->dev);
1837 goto failed;
1838 }
1839
1840 ide_cd_read_toc(drive, &sense);
1841 g->fops = &idecd_ops;
1842 g->flags |= GENHD_FL_REMOVABLE;
1843 add_disk(g);
1844 return 0;
1845
1846 out_free_disk:
1847 put_disk(g);
1848 out_free_cd:
1849 kfree(info);
1850 failed:
1851 return -ENODEV;
1852 }
1853
1854 static void __exit ide_cdrom_exit(void)
1855 {
1856 driver_unregister(&ide_cdrom_driver.gen_driver);
1857 }
1858
1859 static int __init ide_cdrom_init(void)
1860 {
1861 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1862 return driver_register(&ide_cdrom_driver.gen_driver);
1863 }
1864
1865 MODULE_ALIAS("ide:*m-cdrom*");
1866 MODULE_ALIAS("ide-cd");
1867 module_init(ide_cdrom_init);
1868 module_exit(ide_cdrom_exit);
1869 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards