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ide-cd: fix remaining checkpatch.pl issues
[deliverable/linux.git] / drivers / ide / ide-cd.c
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define 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 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
56
57 #define ide_cd_g(disk) \
58 container_of((disk)->private_data, struct cdrom_info, driver)
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_cd_g(disk);
66 if (cd)
67 kref_get(&cd->kref);
68 mutex_unlock(&idecd_ref_mutex);
69 return cd;
70 }
71
72 static void ide_cd_release(struct kref *);
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 mutex_lock(&idecd_ref_mutex);
77 kref_put(&cd->kref, ide_cd_release);
78 mutex_unlock(&idecd_ref_mutex);
79 }
80
81 /*
82 * Generic packet command support and error handling routines.
83 */
84
85 /* Mark that we've seen a media change and invalidate our internal buffers. */
86 static void cdrom_saw_media_change(ide_drive_t *drive)
87 {
88 struct cdrom_info *cd = drive->driver_data;
89
90 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
91 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
92 }
93
94 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
95 struct request_sense *sense)
96 {
97 int log = 0;
98
99 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
100 return 0;
101
102 switch (sense->sense_key) {
103 case NO_SENSE:
104 case RECOVERED_ERROR:
105 break;
106 case NOT_READY:
107 /*
108 * don't care about tray state messages for e.g. capacity
109 * commands or in-progress or becoming ready
110 */
111 if (sense->asc == 0x3a || sense->asc == 0x04)
112 break;
113 log = 1;
114 break;
115 case ILLEGAL_REQUEST:
116 /*
117 * don't log START_STOP unit with LoEj set, since we cannot
118 * reliably check if drive can auto-close
119 */
120 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
121 break;
122 log = 1;
123 break;
124 case UNIT_ATTENTION:
125 /*
126 * Make good and sure we've seen this potential media change.
127 * Some drives (i.e. Creative) fail to present the correct sense
128 * key in the error register.
129 */
130 cdrom_saw_media_change(drive);
131 break;
132 default:
133 log = 1;
134 break;
135 }
136 return log;
137 }
138
139 static void cdrom_analyze_sense_data(ide_drive_t *drive,
140 struct request *failed_command,
141 struct request_sense *sense)
142 {
143 unsigned long sector;
144 unsigned long bio_sectors;
145 unsigned long valid;
146 struct cdrom_info *info = drive->driver_data;
147
148 if (!cdrom_log_sense(drive, failed_command, sense))
149 return;
150
151 /*
152 * If a read toc is executed for a CD-R or CD-RW medium where the first
153 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
154 * confusing error)
155 */
156 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
157 if (sense->sense_key == 0x05 && sense->asc == 0x24)
158 return;
159
160 /* current error */
161 if (sense->error_code == 0x70) {
162 switch (sense->sense_key) {
163 case MEDIUM_ERROR:
164 case VOLUME_OVERFLOW:
165 case ILLEGAL_REQUEST:
166 if (!sense->valid)
167 break;
168 if (failed_command == NULL ||
169 !blk_fs_request(failed_command))
170 break;
171 sector = (sense->information[0] << 24) |
172 (sense->information[1] << 16) |
173 (sense->information[2] << 8) |
174 (sense->information[3]);
175
176 bio_sectors = bio_sectors(failed_command->bio);
177 if (bio_sectors < 4)
178 bio_sectors = 4;
179 if (drive->queue->hardsect_size == 2048)
180 /* device sector size is 2K */
181 sector <<= 2;
182 sector &= ~(bio_sectors - 1);
183 valid = (sector - failed_command->sector) << 9;
184
185 if (valid < 0)
186 valid = 0;
187 if (sector < get_capacity(info->disk) &&
188 drive->probed_capacity - sector < 4 * 75)
189 set_capacity(info->disk, sector);
190 }
191 }
192
193 ide_cd_log_error(drive->name, failed_command, sense);
194 }
195
196 /* Initialize a ide-cd packet command request */
197 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
198 {
199 struct cdrom_info *cd = drive->driver_data;
200
201 ide_init_drive_cmd(rq);
202 rq->cmd_type = REQ_TYPE_ATA_PC;
203 rq->rq_disk = cd->disk;
204 }
205
206 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
207 struct request *failed_command)
208 {
209 struct cdrom_info *info = drive->driver_data;
210 struct request *rq = &info->request_sense_request;
211
212 if (sense == NULL)
213 sense = &info->sense_data;
214
215 /* stuff the sense request in front of our current request */
216 ide_cd_init_rq(drive, rq);
217
218 rq->data = sense;
219 rq->cmd[0] = GPCMD_REQUEST_SENSE;
220 rq->cmd[4] = 18;
221 rq->data_len = 18;
222
223 rq->cmd_type = REQ_TYPE_SENSE;
224
225 /* NOTE! Save the failed command in "rq->buffer" */
226 rq->buffer = (void *) failed_command;
227
228 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
229 }
230
231 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
232 {
233 struct request *rq = HWGROUP(drive)->rq;
234 int nsectors = rq->hard_cur_sectors;
235
236 if (blk_sense_request(rq) && uptodate) {
237 /*
238 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
239 * failed request
240 */
241 struct request *failed = (struct request *) rq->buffer;
242 struct cdrom_info *info = drive->driver_data;
243 void *sense = &info->sense_data;
244 unsigned long flags;
245
246 if (failed) {
247 if (failed->sense) {
248 sense = failed->sense;
249 failed->sense_len = rq->sense_len;
250 }
251 cdrom_analyze_sense_data(drive, failed, sense);
252 /*
253 * now end the failed request
254 */
255 if (blk_fs_request(failed)) {
256 if (ide_end_dequeued_request(drive, failed, 0,
257 failed->hard_nr_sectors))
258 BUG();
259 } else {
260 spin_lock_irqsave(&ide_lock, flags);
261 if (__blk_end_request(failed, -EIO,
262 failed->data_len))
263 BUG();
264 spin_unlock_irqrestore(&ide_lock, flags);
265 }
266 } else
267 cdrom_analyze_sense_data(drive, NULL, sense);
268 }
269
270 if (!rq->current_nr_sectors && blk_fs_request(rq))
271 uptodate = 1;
272 /* make sure it's fully ended */
273 if (blk_pc_request(rq))
274 nsectors = (rq->data_len + 511) >> 9;
275 if (!nsectors)
276 nsectors = 1;
277
278 ide_end_request(drive, uptodate, nsectors);
279 }
280
281 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
282 {
283 if (st & 0x80)
284 return;
285 ide_dump_status(drive, msg, st);
286 }
287
288 /*
289 * Returns:
290 * 0: if the request should be continued.
291 * 1: if the request was ended.
292 */
293 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
294 {
295 struct request *rq = HWGROUP(drive)->rq;
296 int stat, err, sense_key;
297
298 /* check for errors */
299 stat = ide_read_status(drive);
300
301 if (stat_ret)
302 *stat_ret = stat;
303
304 if (OK_STAT(stat, good_stat, BAD_R_STAT))
305 return 0;
306
307 /* get the IDE error register */
308 err = ide_read_error(drive);
309 sense_key = err >> 4;
310
311 if (rq == NULL) {
312 printk(KERN_ERR "%s: missing rq in %s\n",
313 drive->name, __func__);
314 return 1;
315 }
316
317 if (blk_sense_request(rq)) {
318 /*
319 * We got an error trying to get sense info from the drive
320 * (probably while trying to recover from a former error).
321 * Just give up.
322 */
323 rq->cmd_flags |= REQ_FAILED;
324 cdrom_end_request(drive, 0);
325 ide_error(drive, "request sense failure", stat);
326 return 1;
327
328 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
329 /* All other functions, except for READ. */
330
331 /*
332 * if we have an error, pass back CHECK_CONDITION as the
333 * scsi status byte
334 */
335 if (blk_pc_request(rq) && !rq->errors)
336 rq->errors = SAM_STAT_CHECK_CONDITION;
337
338 /* check for tray open */
339 if (sense_key == NOT_READY) {
340 cdrom_saw_media_change(drive);
341 } else if (sense_key == UNIT_ATTENTION) {
342 /* check for media change */
343 cdrom_saw_media_change(drive);
344 return 0;
345 } else if (sense_key == ILLEGAL_REQUEST &&
346 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
347 /*
348 * Don't print error message for this condition--
349 * SFF8090i indicates that 5/24/00 is the correct
350 * response to a request to close the tray if the
351 * drive doesn't have that capability.
352 * cdrom_log_sense() knows this!
353 */
354 } else if (!(rq->cmd_flags & REQ_QUIET)) {
355 /* otherwise, print an error */
356 ide_dump_status(drive, "packet command error", stat);
357 }
358
359 rq->cmd_flags |= REQ_FAILED;
360
361 /*
362 * instead of playing games with moving completions around,
363 * remove failed request completely and end it when the
364 * request sense has completed
365 */
366 goto end_request;
367
368 } else if (blk_fs_request(rq)) {
369 int do_end_request = 0;
370
371 /* handle errors from READ and WRITE requests */
372
373 if (blk_noretry_request(rq))
374 do_end_request = 1;
375
376 if (sense_key == NOT_READY) {
377 /* tray open */
378 if (rq_data_dir(rq) == READ) {
379 cdrom_saw_media_change(drive);
380
381 /* fail the request */
382 printk(KERN_ERR "%s: tray open\n", drive->name);
383 do_end_request = 1;
384 } else {
385 struct cdrom_info *info = drive->driver_data;
386
387 /*
388 * Allow the drive 5 seconds to recover, some
389 * devices will return this error while flushing
390 * data from cache.
391 */
392 if (!rq->errors)
393 info->write_timeout = jiffies +
394 ATAPI_WAIT_WRITE_BUSY;
395 rq->errors = 1;
396 if (time_after(jiffies, info->write_timeout))
397 do_end_request = 1;
398 else {
399 unsigned long flags;
400
401 /*
402 * take a breather relying on the unplug
403 * timer to kick us again
404 */
405 spin_lock_irqsave(&ide_lock, flags);
406 blk_plug_device(drive->queue);
407 spin_unlock_irqrestore(&ide_lock,
408 flags);
409 return 1;
410 }
411 }
412 } else if (sense_key == UNIT_ATTENTION) {
413 /* media change */
414 cdrom_saw_media_change(drive);
415
416 /*
417 * Arrange to retry the request but be sure to give up
418 * if we've retried too many times.
419 */
420 if (++rq->errors > ERROR_MAX)
421 do_end_request = 1;
422 } else if (sense_key == ILLEGAL_REQUEST ||
423 sense_key == DATA_PROTECT) {
424 /*
425 * No point in retrying after an illegal request or data
426 * protect error.
427 */
428 ide_dump_status_no_sense(drive, "command error", stat);
429 do_end_request = 1;
430 } else if (sense_key == MEDIUM_ERROR) {
431 /*
432 * No point in re-trying a zillion times on a bad
433 * sector. If we got here the error is not correctable.
434 */
435 ide_dump_status_no_sense(drive,
436 "media error (bad sector)",
437 stat);
438 do_end_request = 1;
439 } else if (sense_key == BLANK_CHECK) {
440 /* disk appears blank ?? */
441 ide_dump_status_no_sense(drive, "media error (blank)",
442 stat);
443 do_end_request = 1;
444 } else if ((err & ~ABRT_ERR) != 0) {
445 /* go to the default handler for other errors */
446 ide_error(drive, "cdrom_decode_status", stat);
447 return 1;
448 } else if ((++rq->errors > ERROR_MAX)) {
449 /* we've racked up too many retries, abort */
450 do_end_request = 1;
451 }
452
453 /*
454 * End a request through request sense analysis when we have
455 * sense data. We need this in order to perform end of media
456 * processing.
457 */
458 if (do_end_request)
459 goto end_request;
460
461 /*
462 * If we got a CHECK_CONDITION status, queue
463 * a request sense command.
464 */
465 if (stat & ERR_STAT)
466 cdrom_queue_request_sense(drive, NULL, NULL);
467 } else {
468 blk_dump_rq_flags(rq, "ide-cd: bad rq");
469 cdrom_end_request(drive, 0);
470 }
471
472 /* retry, or handle the next request */
473 return 1;
474
475 end_request:
476 if (stat & ERR_STAT) {
477 unsigned long flags;
478
479 spin_lock_irqsave(&ide_lock, flags);
480 blkdev_dequeue_request(rq);
481 HWGROUP(drive)->rq = NULL;
482 spin_unlock_irqrestore(&ide_lock, flags);
483
484 cdrom_queue_request_sense(drive, rq->sense, rq);
485 } else
486 cdrom_end_request(drive, 0);
487
488 return 1;
489 }
490
491 static int cdrom_timer_expiry(ide_drive_t *drive)
492 {
493 struct request *rq = HWGROUP(drive)->rq;
494 unsigned long wait = 0;
495
496 /*
497 * Some commands are *slow* and normally take a long time to complete.
498 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
499 * commands/drives support that. Let ide_timer_expiry keep polling us
500 * for these.
501 */
502 switch (rq->cmd[0]) {
503 case GPCMD_BLANK:
504 case GPCMD_FORMAT_UNIT:
505 case GPCMD_RESERVE_RZONE_TRACK:
506 case GPCMD_CLOSE_TRACK:
507 case GPCMD_FLUSH_CACHE:
508 wait = ATAPI_WAIT_PC;
509 break;
510 default:
511 if (!(rq->cmd_flags & REQ_QUIET))
512 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
513 rq->cmd[0]);
514 wait = 0;
515 break;
516 }
517 return wait;
518 }
519
520 /*
521 * Set up the device registers for transferring a packet command on DEV,
522 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
523 * which actually transfers the command to the drive. If this is a
524 * drq_interrupt device, this routine will arrange for HANDLER to be
525 * called when the interrupt from the drive arrives. Otherwise, HANDLER
526 * will be called immediately after the drive is prepared for the transfer.
527 */
528 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
529 int xferlen,
530 ide_handler_t *handler)
531 {
532 ide_startstop_t startstop;
533 struct cdrom_info *info = drive->driver_data;
534 ide_hwif_t *hwif = drive->hwif;
535
536 /* wait for the controller to be idle */
537 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
538 return startstop;
539
540 /* FIXME: for Virtual DMA we must check harder */
541 if (info->dma)
542 info->dma = !hwif->dma_setup(drive);
543
544 /* set up the controller registers */
545 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
546 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
547
548 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
549 /* waiting for CDB interrupt, not DMA yet. */
550 if (info->dma)
551 drive->waiting_for_dma = 0;
552
553 /* packet command */
554 ide_execute_command(drive, WIN_PACKETCMD, handler,
555 ATAPI_WAIT_PC, cdrom_timer_expiry);
556 return ide_started;
557 } else {
558 unsigned long flags;
559
560 /* packet command */
561 spin_lock_irqsave(&ide_lock, flags);
562 hwif->OUTBSYNC(drive, WIN_PACKETCMD,
563 hwif->io_ports[IDE_COMMAND_OFFSET]);
564 ndelay(400);
565 spin_unlock_irqrestore(&ide_lock, flags);
566
567 return (*handler) (drive);
568 }
569 }
570
571 /*
572 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
573 * registers must have already been prepared by cdrom_start_packet_command.
574 * HANDLER is the interrupt handler to call when the command completes or
575 * there's data ready.
576 */
577 #define ATAPI_MIN_CDB_BYTES 12
578 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
579 struct request *rq,
580 ide_handler_t *handler)
581 {
582 ide_hwif_t *hwif = drive->hwif;
583 int cmd_len;
584 struct cdrom_info *info = drive->driver_data;
585 ide_startstop_t startstop;
586
587 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
588 /*
589 * Here we should have been called after receiving an interrupt
590 * from the device. DRQ should how be set.
591 */
592
593 /* check for errors */
594 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
595 return ide_stopped;
596
597 /* ok, next interrupt will be DMA interrupt */
598 if (info->dma)
599 drive->waiting_for_dma = 1;
600 } else {
601 /* otherwise, we must wait for DRQ to get set */
602 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
603 BUSY_STAT, WAIT_READY))
604 return startstop;
605 }
606
607 /* arm the interrupt handler */
608 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
609
610 /* ATAPI commands get padded out to 12 bytes minimum */
611 cmd_len = COMMAND_SIZE(rq->cmd[0]);
612 if (cmd_len < ATAPI_MIN_CDB_BYTES)
613 cmd_len = ATAPI_MIN_CDB_BYTES;
614
615 /* send the command to the device */
616 HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
617
618 /* start the DMA if need be */
619 if (info->dma)
620 hwif->dma_start(drive);
621
622 return ide_started;
623 }
624
625 /*
626 * Block read functions.
627 */
628 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
629 {
630 while (len > 0) {
631 int dum = 0;
632 xf(drive, &dum, sizeof(dum));
633 len -= sizeof(dum);
634 }
635 }
636
637 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
638 {
639 while (nsects > 0) {
640 static char dum[SECTOR_SIZE];
641
642 drive->hwif->atapi_input_bytes(drive, dum, sizeof(dum));
643 nsects--;
644 }
645 }
646
647 /*
648 * Check the contents of the interrupt reason register from the cdrom
649 * and attempt to recover if there are problems. Returns 0 if everything's
650 * ok; nonzero if the request has been terminated.
651 */
652 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
653 int len, int ireason, int rw)
654 {
655 /*
656 * ireason == 0: the drive wants to receive data from us
657 * ireason == 2: the drive is expecting to transfer data to us
658 */
659 if (ireason == (!rw << 1))
660 return 0;
661 else if (ireason == (rw << 1)) {
662 ide_hwif_t *hwif = drive->hwif;
663 xfer_func_t *xf;
664
665 /* whoops... */
666 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
667 drive->name, __func__);
668
669 xf = rw ? hwif->atapi_output_bytes : hwif->atapi_input_bytes;
670 ide_cd_pad_transfer(drive, xf, len);
671 } else if (rw == 0 && ireason == 1) {
672 /*
673 * Some drives (ASUS) seem to tell us that status info is
674 * available. Just get it and ignore.
675 */
676 (void)ide_read_status(drive);
677 return 0;
678 } else {
679 /* drive wants a command packet, or invalid ireason... */
680 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
681 drive->name, __func__, ireason);
682 }
683
684 if (rq->cmd_type == REQ_TYPE_ATA_PC)
685 rq->cmd_flags |= REQ_FAILED;
686
687 cdrom_end_request(drive, 0);
688 return -1;
689 }
690
691 /*
692 * Assume that the drive will always provide data in multiples of at least
693 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
694 */
695 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
696 {
697 struct cdrom_info *cd = drive->driver_data;
698
699 if ((len % SECTOR_SIZE) == 0)
700 return 0;
701
702 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
703 drive->name, __func__, len);
704
705 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
706 printk(KERN_ERR " This drive is not supported by "
707 "this version of the driver\n");
708 else {
709 printk(KERN_ERR " Trying to limit transfer sizes\n");
710 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
711 }
712
713 return 1;
714 }
715
716 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
717
718 /*
719 * Routine to send a read/write packet command to the drive. This is usually
720 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
721 * devices, it is called from an interrupt when the drive is ready to accept
722 * the command.
723 */
724 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
725 {
726 struct request *rq = HWGROUP(drive)->rq;
727
728 if (rq_data_dir(rq) == READ) {
729 unsigned short sectors_per_frame =
730 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
731 int nskip = rq->sector & (sectors_per_frame - 1);
732
733 /*
734 * If the requested sector doesn't start on a frame boundary,
735 * we must adjust the start of the transfer so that it does,
736 * and remember to skip the first few sectors.
737 *
738 * If the rq->current_nr_sectors field is larger than the size
739 * of the buffer, it will mean that we're to skip a number of
740 * sectors equal to the amount by which rq->current_nr_sectors
741 * is larger than the buffer size.
742 */
743 if (nskip > 0) {
744 /* sanity check... */
745 if (rq->current_nr_sectors !=
746 bio_cur_sectors(rq->bio)) {
747 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
748 drive->name, __func__,
749 rq->current_nr_sectors);
750 cdrom_end_request(drive, 0);
751 return ide_stopped;
752 }
753 rq->current_nr_sectors += nskip;
754 }
755 }
756 #if 0
757 else
758 /* the immediate bit */
759 rq->cmd[1] = 1 << 3;
760 #endif
761 /* set up the command */
762 rq->timeout = ATAPI_WAIT_PC;
763
764 /* send the command to the drive and return */
765 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
766 }
767
768 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
769 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
770 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
771
772 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
773 {
774 struct cdrom_info *info = drive->driver_data;
775 int stat;
776 static int retry = 10;
777
778 if (cdrom_decode_status(drive, 0, &stat))
779 return ide_stopped;
780
781 info->cd_flags |= IDE_CD_FLAG_SEEKING;
782
783 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
784 if (--retry == 0)
785 drive->dsc_overlap = 0;
786 }
787 return ide_stopped;
788 }
789
790 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
791 {
792 struct request *rq = HWGROUP(drive)->rq;
793 sector_t frame = rq->sector;
794
795 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
796
797 memset(rq->cmd, 0, sizeof(rq->cmd));
798 rq->cmd[0] = GPCMD_SEEK;
799 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
800
801 rq->timeout = ATAPI_WAIT_PC;
802 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
803 }
804
805 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
806 {
807 struct cdrom_info *info = drive->driver_data;
808
809 info->dma = 0;
810 info->start_seek = jiffies;
811 return cdrom_start_packet_command(drive, 0,
812 cdrom_start_seek_continuation);
813 }
814
815 /*
816 * Fix up a possibly partially-processed request so that we can start it over
817 * entirely, or even put it back on the request queue.
818 */
819 static void restore_request(struct request *rq)
820 {
821 if (rq->buffer != bio_data(rq->bio)) {
822 sector_t n =
823 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
824
825 rq->buffer = bio_data(rq->bio);
826 rq->nr_sectors += n;
827 rq->sector -= n;
828 }
829 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
830 rq->hard_cur_sectors = rq->current_nr_sectors;
831 rq->hard_nr_sectors = rq->nr_sectors;
832 rq->hard_sector = rq->sector;
833 rq->q->prep_rq_fn(rq->q, rq);
834 }
835
836 /*
837 * All other packet commands.
838 */
839 static void ide_cd_request_sense_fixup(struct request *rq)
840 {
841 /*
842 * Some of the trailing request sense fields are optional,
843 * and some drives don't send them. Sigh.
844 */
845 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
846 rq->data_len > 0 && rq->data_len <= 5)
847 while (rq->data_len > 0) {
848 *(u8 *)rq->data++ = 0;
849 --rq->data_len;
850 }
851 }
852
853 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
854 {
855 struct request_sense sense;
856 int retries = 10;
857 unsigned int flags = rq->cmd_flags;
858
859 if (rq->sense == NULL)
860 rq->sense = &sense;
861
862 /* start of retry loop */
863 do {
864 int error;
865 unsigned long time = jiffies;
866 rq->cmd_flags = flags;
867
868 error = ide_do_drive_cmd(drive, rq, ide_wait);
869 time = jiffies - time;
870
871 /*
872 * FIXME: we should probably abort/retry or something in case of
873 * failure.
874 */
875 if (rq->cmd_flags & REQ_FAILED) {
876 /*
877 * The request failed. Retry if it was due to a unit
878 * attention status (usually means media was changed).
879 */
880 struct request_sense *reqbuf = rq->sense;
881
882 if (reqbuf->sense_key == UNIT_ATTENTION)
883 cdrom_saw_media_change(drive);
884 else if (reqbuf->sense_key == NOT_READY &&
885 reqbuf->asc == 4 && reqbuf->ascq != 4) {
886 /*
887 * The drive is in the process of loading
888 * a disk. Retry, but wait a little to give
889 * the drive time to complete the load.
890 */
891 ssleep(2);
892 } else {
893 /* otherwise, don't retry */
894 retries = 0;
895 }
896 --retries;
897 }
898
899 /* end of retry loop */
900 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
901
902 /* return an error if the command failed */
903 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
904 }
905
906 /*
907 * Called from blk_end_request_callback() after the data of the request is
908 * completed and before the request itself is completed. By returning value '1',
909 * blk_end_request_callback() returns immediately without completing it.
910 */
911 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
912 {
913 return 1;
914 }
915
916 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
917 {
918 ide_hwif_t *hwif = drive->hwif;
919 struct cdrom_info *info = drive->driver_data;
920 struct request *rq = HWGROUP(drive)->rq;
921 xfer_func_t *xferfunc;
922 ide_expiry_t *expiry = NULL;
923 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
924 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
925 unsigned int timeout;
926 u8 lowcyl, highcyl;
927
928 /* check for errors */
929 dma = info->dma;
930 if (dma) {
931 info->dma = 0;
932 dma_error = HWIF(drive)->ide_dma_end(drive);
933 if (dma_error) {
934 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
935 write ? "write" : "read");
936 ide_dma_off(drive);
937 }
938 }
939
940 if (cdrom_decode_status(drive, 0, &stat))
941 return ide_stopped;
942
943 /* using dma, transfer is complete now */
944 if (dma) {
945 if (dma_error)
946 return ide_error(drive, "dma error", stat);
947 if (blk_fs_request(rq)) {
948 ide_end_request(drive, 1, rq->nr_sectors);
949 return ide_stopped;
950 }
951 goto end_request;
952 }
953
954 /* ok we fall to pio :/ */
955 ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]) & 0x3;
956 lowcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
957 highcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]);
958
959 len = lowcyl + (256 * highcyl);
960
961 thislen = blk_fs_request(rq) ? len : rq->data_len;
962 if (thislen > len)
963 thislen = len;
964
965 /* If DRQ is clear, the command has completed. */
966 if ((stat & DRQ_STAT) == 0) {
967 if (blk_fs_request(rq)) {
968 /*
969 * If we're not done reading/writing, complain.
970 * Otherwise, complete the command normally.
971 */
972 uptodate = 1;
973 if (rq->current_nr_sectors > 0) {
974 printk(KERN_ERR "%s: %s: data underrun "
975 "(%d blocks)\n",
976 drive->name, __func__,
977 rq->current_nr_sectors);
978 if (!write)
979 rq->cmd_flags |= REQ_FAILED;
980 uptodate = 0;
981 }
982 cdrom_end_request(drive, uptodate);
983 return ide_stopped;
984 } else if (!blk_pc_request(rq)) {
985 ide_cd_request_sense_fixup(rq);
986 /* complain if we still have data left to transfer */
987 uptodate = rq->data_len ? 0 : 1;
988 }
989 goto end_request;
990 }
991
992 /* check which way to transfer data */
993 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
994 return ide_stopped;
995
996 if (blk_fs_request(rq)) {
997 if (write == 0) {
998 int nskip;
999
1000 if (ide_cd_check_transfer_size(drive, len)) {
1001 cdrom_end_request(drive, 0);
1002 return ide_stopped;
1003 }
1004
1005 /*
1006 * First, figure out if we need to bit-bucket
1007 * any of the leading sectors.
1008 */
1009 nskip = min_t(int, rq->current_nr_sectors
1010 - bio_cur_sectors(rq->bio),
1011 thislen >> 9);
1012 if (nskip > 0) {
1013 ide_cd_drain_data(drive, nskip);
1014 rq->current_nr_sectors -= nskip;
1015 thislen -= (nskip << 9);
1016 }
1017 }
1018 }
1019
1020 if (ireason == 0) {
1021 write = 1;
1022 xferfunc = HWIF(drive)->atapi_output_bytes;
1023 } else {
1024 write = 0;
1025 xferfunc = HWIF(drive)->atapi_input_bytes;
1026 }
1027
1028 /* transfer data */
1029 while (thislen > 0) {
1030 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1031 int blen = rq->data_len;
1032
1033 /* bio backed? */
1034 if (rq->bio) {
1035 if (blk_fs_request(rq)) {
1036 ptr = rq->buffer;
1037 blen = rq->current_nr_sectors << 9;
1038 } else {
1039 ptr = bio_data(rq->bio);
1040 blen = bio_iovec(rq->bio)->bv_len;
1041 }
1042 }
1043
1044 if (!ptr) {
1045 if (blk_fs_request(rq) && !write)
1046 /*
1047 * If the buffers are full, pipe the rest into
1048 * oblivion.
1049 */
1050 ide_cd_drain_data(drive, thislen >> 9);
1051 else {
1052 printk(KERN_ERR "%s: confused, missing data\n",
1053 drive->name);
1054 blk_dump_rq_flags(rq, rq_data_dir(rq)
1055 ? "cdrom_newpc_intr, write"
1056 : "cdrom_newpc_intr, read");
1057 }
1058 break;
1059 }
1060
1061 if (blen > thislen)
1062 blen = thislen;
1063
1064 xferfunc(drive, ptr, blen);
1065
1066 thislen -= blen;
1067 len -= blen;
1068
1069 if (blk_fs_request(rq)) {
1070 rq->buffer += blen;
1071 rq->nr_sectors -= (blen >> 9);
1072 rq->current_nr_sectors -= (blen >> 9);
1073 rq->sector += (blen >> 9);
1074
1075 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1076 cdrom_end_request(drive, 1);
1077 } else {
1078 rq->data_len -= blen;
1079
1080 /*
1081 * The request can't be completed until DRQ is cleared.
1082 * So complete the data, but don't complete the request
1083 * using the dummy function for the callback feature
1084 * of blk_end_request_callback().
1085 */
1086 if (rq->bio)
1087 blk_end_request_callback(rq, 0, blen,
1088 cdrom_newpc_intr_dummy_cb);
1089 else
1090 rq->data += blen;
1091 }
1092 if (!write && blk_sense_request(rq))
1093 rq->sense_len += blen;
1094 }
1095
1096 /* pad, if necessary */
1097 if (!blk_fs_request(rq) && len > 0)
1098 ide_cd_pad_transfer(drive, xferfunc, len);
1099
1100 if (blk_pc_request(rq)) {
1101 timeout = rq->timeout;
1102 } else {
1103 timeout = ATAPI_WAIT_PC;
1104 if (!blk_fs_request(rq))
1105 expiry = cdrom_timer_expiry;
1106 }
1107
1108 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1109 return ide_started;
1110
1111 end_request:
1112 if (blk_pc_request(rq)) {
1113 unsigned long flags;
1114 unsigned int dlen = rq->data_len;
1115
1116 if (dma)
1117 rq->data_len = 0;
1118
1119 spin_lock_irqsave(&ide_lock, flags);
1120 if (__blk_end_request(rq, 0, dlen))
1121 BUG();
1122 HWGROUP(drive)->rq = NULL;
1123 spin_unlock_irqrestore(&ide_lock, flags);
1124 } else {
1125 if (!uptodate)
1126 rq->cmd_flags |= REQ_FAILED;
1127 cdrom_end_request(drive, uptodate);
1128 }
1129 return ide_stopped;
1130 }
1131
1132 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1133 {
1134 struct cdrom_info *cd = drive->driver_data;
1135 int write = rq_data_dir(rq) == WRITE;
1136 unsigned short sectors_per_frame =
1137 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1138
1139 if (write) {
1140 /* disk has become write protected */
1141 if (cd->disk->policy) {
1142 cdrom_end_request(drive, 0);
1143 return ide_stopped;
1144 }
1145 } else {
1146 /*
1147 * We may be retrying this request after an error. Fix up any
1148 * weirdness which might be present in the request packet.
1149 */
1150 restore_request(rq);
1151 }
1152
1153 /* use DMA, if possible / writes *must* be hardware frame aligned */
1154 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1155 (rq->sector & (sectors_per_frame - 1))) {
1156 if (write) {
1157 cdrom_end_request(drive, 0);
1158 return ide_stopped;
1159 }
1160 cd->dma = 0;
1161 } else
1162 cd->dma = drive->using_dma;
1163
1164 if (write)
1165 cd->devinfo.media_written = 1;
1166
1167 /* start sending the read/write request to the drive */
1168 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1169 }
1170
1171 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1172 {
1173 struct request *rq = HWGROUP(drive)->rq;
1174
1175 if (!rq->timeout)
1176 rq->timeout = ATAPI_WAIT_PC;
1177
1178 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1179 }
1180
1181 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1182 {
1183 struct cdrom_info *info = drive->driver_data;
1184
1185 if (blk_pc_request(rq))
1186 rq->cmd_flags |= REQ_QUIET;
1187 else
1188 rq->cmd_flags &= ~REQ_FAILED;
1189
1190 info->dma = 0;
1191
1192 /* sg request */
1193 if (rq->bio) {
1194 int mask = drive->queue->dma_alignment;
1195 unsigned long addr =
1196 (unsigned long)page_address(bio_page(rq->bio));
1197
1198 info->dma = drive->using_dma;
1199
1200 /*
1201 * check if dma is safe
1202 *
1203 * NOTE! The "len" and "addr" checks should possibly have
1204 * separate masks.
1205 */
1206 if ((rq->data_len & 15) || (addr & mask))
1207 info->dma = 0;
1208 }
1209
1210 /* start sending the command to the drive */
1211 return cdrom_start_packet_command(drive, rq->data_len,
1212 cdrom_do_newpc_cont);
1213 }
1214
1215 /*
1216 * cdrom driver request routine.
1217 */
1218 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1219 sector_t block)
1220 {
1221 ide_startstop_t action;
1222 struct cdrom_info *info = drive->driver_data;
1223
1224 if (blk_fs_request(rq)) {
1225 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1226 unsigned long elapsed = jiffies - info->start_seek;
1227 int stat = ide_read_status(drive);
1228
1229 if ((stat & SEEK_STAT) != SEEK_STAT) {
1230 if (elapsed < IDECD_SEEK_TIMEOUT) {
1231 ide_stall_queue(drive,
1232 IDECD_SEEK_TIMER);
1233 return ide_stopped;
1234 }
1235 printk(KERN_ERR "%s: DSC timeout\n",
1236 drive->name);
1237 }
1238 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1239 }
1240 if (rq_data_dir(rq) == READ &&
1241 IDE_LARGE_SEEK(info->last_block, block,
1242 IDECD_SEEK_THRESHOLD) &&
1243 drive->dsc_overlap)
1244 action = cdrom_start_seek(drive, block);
1245 else
1246 action = cdrom_start_rw(drive, rq);
1247 info->last_block = block;
1248 return action;
1249 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1250 rq->cmd_type == REQ_TYPE_ATA_PC) {
1251 return cdrom_do_block_pc(drive, rq);
1252 } else if (blk_special_request(rq)) {
1253 /* right now this can only be a reset... */
1254 cdrom_end_request(drive, 1);
1255 return ide_stopped;
1256 }
1257
1258 blk_dump_rq_flags(rq, "ide-cd bad flags");
1259 cdrom_end_request(drive, 0);
1260 return ide_stopped;
1261 }
1262
1263
1264
1265 /*
1266 * Ioctl handling.
1267 *
1268 * Routines which queue packet commands take as a final argument a pointer to a
1269 * request_sense struct. If execution of the command results in an error with a
1270 * CHECK CONDITION status, this structure will be filled with the results of the
1271 * subsequent request sense command. The pointer can also be NULL, in which case
1272 * no sense information is returned.
1273 */
1274 static void msf_from_bcd(struct atapi_msf *msf)
1275 {
1276 msf->minute = BCD2BIN(msf->minute);
1277 msf->second = BCD2BIN(msf->second);
1278 msf->frame = BCD2BIN(msf->frame);
1279 }
1280
1281 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1282 {
1283 struct request req;
1284 struct cdrom_info *info = drive->driver_data;
1285 struct cdrom_device_info *cdi = &info->devinfo;
1286
1287 ide_cd_init_rq(drive, &req);
1288
1289 req.sense = sense;
1290 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1291 req.cmd_flags |= REQ_QUIET;
1292
1293 /*
1294 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1295 * instead of supporting the LOAD_UNLOAD opcode.
1296 */
1297 req.cmd[7] = cdi->sanyo_slot % 3;
1298
1299 return ide_cd_queue_pc(drive, &req);
1300 }
1301
1302 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1303 unsigned long *sectors_per_frame,
1304 struct request_sense *sense)
1305 {
1306 struct {
1307 __u32 lba;
1308 __u32 blocklen;
1309 } capbuf;
1310
1311 int stat;
1312 struct request req;
1313
1314 ide_cd_init_rq(drive, &req);
1315
1316 req.sense = sense;
1317 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1318 req.data = (char *)&capbuf;
1319 req.data_len = sizeof(capbuf);
1320 req.cmd_flags |= REQ_QUIET;
1321
1322 stat = ide_cd_queue_pc(drive, &req);
1323 if (stat == 0) {
1324 *capacity = 1 + be32_to_cpu(capbuf.lba);
1325 *sectors_per_frame =
1326 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1327 }
1328
1329 return stat;
1330 }
1331
1332 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1333 int format, char *buf, int buflen,
1334 struct request_sense *sense)
1335 {
1336 struct request req;
1337
1338 ide_cd_init_rq(drive, &req);
1339
1340 req.sense = sense;
1341 req.data = buf;
1342 req.data_len = buflen;
1343 req.cmd_flags |= REQ_QUIET;
1344 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1345 req.cmd[6] = trackno;
1346 req.cmd[7] = (buflen >> 8);
1347 req.cmd[8] = (buflen & 0xff);
1348 req.cmd[9] = (format << 6);
1349
1350 if (msf_flag)
1351 req.cmd[1] = 2;
1352
1353 return ide_cd_queue_pc(drive, &req);
1354 }
1355
1356 /* Try to read the entire TOC for the disk into our internal buffer. */
1357 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1358 {
1359 int stat, ntracks, i;
1360 struct cdrom_info *info = drive->driver_data;
1361 struct cdrom_device_info *cdi = &info->devinfo;
1362 struct atapi_toc *toc = info->toc;
1363 struct {
1364 struct atapi_toc_header hdr;
1365 struct atapi_toc_entry ent;
1366 } ms_tmp;
1367 long last_written;
1368 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1369
1370 if (toc == NULL) {
1371 /* try to allocate space */
1372 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1373 if (toc == NULL) {
1374 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1375 drive->name);
1376 return -ENOMEM;
1377 }
1378 info->toc = toc;
1379 }
1380
1381 /*
1382 * Check to see if the existing data is still valid. If it is,
1383 * just return.
1384 */
1385 (void) cdrom_check_status(drive, sense);
1386
1387 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1388 return 0;
1389
1390 /* try to get the total cdrom capacity and sector size */
1391 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1392 sense);
1393 if (stat)
1394 toc->capacity = 0x1fffff;
1395
1396 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1397 /* save a private copy of the TOC capacity for error handling */
1398 drive->probed_capacity = toc->capacity * sectors_per_frame;
1399
1400 blk_queue_hardsect_size(drive->queue,
1401 sectors_per_frame << SECTOR_BITS);
1402
1403 /* first read just the header, so we know how long the TOC is */
1404 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1405 sizeof(struct atapi_toc_header), sense);
1406 if (stat)
1407 return stat;
1408
1409 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1410 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1411 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1412 }
1413
1414 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1415 if (ntracks <= 0)
1416 return -EIO;
1417 if (ntracks > MAX_TRACKS)
1418 ntracks = MAX_TRACKS;
1419
1420 /* now read the whole schmeer */
1421 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1422 (char *)&toc->hdr,
1423 sizeof(struct atapi_toc_header) +
1424 (ntracks + 1) *
1425 sizeof(struct atapi_toc_entry), sense);
1426
1427 if (stat && toc->hdr.first_track > 1) {
1428 /*
1429 * Cds with CDI tracks only don't have any TOC entries, despite
1430 * of this the returned values are
1431 * first_track == last_track = number of CDI tracks + 1,
1432 * so that this case is indistinguishable from the same layout
1433 * plus an additional audio track. If we get an error for the
1434 * regular case, we assume a CDI without additional audio
1435 * tracks. In this case the readable TOC is empty (CDI tracks
1436 * are not included) and only holds the Leadout entry.
1437 *
1438 * Heiko Eißfeldt.
1439 */
1440 ntracks = 0;
1441 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1442 (char *)&toc->hdr,
1443 sizeof(struct atapi_toc_header) +
1444 (ntracks + 1) *
1445 sizeof(struct atapi_toc_entry),
1446 sense);
1447 if (stat)
1448 return stat;
1449
1450 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1451 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1452 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1453 } else {
1454 toc->hdr.first_track = CDROM_LEADOUT;
1455 toc->hdr.last_track = CDROM_LEADOUT;
1456 }
1457 }
1458
1459 if (stat)
1460 return stat;
1461
1462 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1463
1464 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1465 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1466 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1467 }
1468
1469 for (i = 0; i <= ntracks; i++) {
1470 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1471 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1472 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1473 msf_from_bcd(&toc->ent[i].addr.msf);
1474 }
1475 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1476 toc->ent[i].addr.msf.second,
1477 toc->ent[i].addr.msf.frame);
1478 }
1479
1480 if (toc->hdr.first_track != CDROM_LEADOUT) {
1481 /* read the multisession information */
1482 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1483 sizeof(ms_tmp), sense);
1484 if (stat)
1485 return stat;
1486
1487 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1488 } else {
1489 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1490 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1491 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1492 }
1493
1494 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1495 /* re-read multisession information using MSF format */
1496 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1497 sizeof(ms_tmp), sense);
1498 if (stat)
1499 return stat;
1500
1501 msf_from_bcd(&ms_tmp.ent.addr.msf);
1502 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1503 ms_tmp.ent.addr.msf.second,
1504 ms_tmp.ent.addr.msf.frame);
1505 }
1506
1507 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1508
1509 /* now try to get the total cdrom capacity */
1510 stat = cdrom_get_last_written(cdi, &last_written);
1511 if (!stat && (last_written > toc->capacity)) {
1512 toc->capacity = last_written;
1513 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1514 drive->probed_capacity = toc->capacity * sectors_per_frame;
1515 }
1516
1517 /* Remember that we've read this stuff. */
1518 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1519
1520 return 0;
1521 }
1522
1523 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1524 {
1525 struct cdrom_info *info = drive->driver_data;
1526 struct cdrom_device_info *cdi = &info->devinfo;
1527 struct packet_command cgc;
1528 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1529
1530 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1531 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1532
1533 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1534 do {
1535 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1536 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1537 if (!stat)
1538 break;
1539 } while (--attempts);
1540 return stat;
1541 }
1542
1543 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1544 {
1545 struct cdrom_info *cd = drive->driver_data;
1546 u16 curspeed, maxspeed;
1547
1548 curspeed = *(u16 *)&buf[8 + 14];
1549 maxspeed = *(u16 *)&buf[8 + 8];
1550
1551 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1552 curspeed = le16_to_cpu(curspeed);
1553 maxspeed = le16_to_cpu(maxspeed);
1554 } else {
1555 curspeed = be16_to_cpu(curspeed);
1556 maxspeed = be16_to_cpu(maxspeed);
1557 }
1558
1559 cd->current_speed = (curspeed + (176/2)) / 176;
1560 cd->max_speed = (maxspeed + (176/2)) / 176;
1561 }
1562
1563 #define IDE_CD_CAPABILITIES \
1564 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1565 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1566 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1567 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1568 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1569
1570 static struct cdrom_device_ops ide_cdrom_dops = {
1571 .open = ide_cdrom_open_real,
1572 .release = ide_cdrom_release_real,
1573 .drive_status = ide_cdrom_drive_status,
1574 .media_changed = ide_cdrom_check_media_change_real,
1575 .tray_move = ide_cdrom_tray_move,
1576 .lock_door = ide_cdrom_lock_door,
1577 .select_speed = ide_cdrom_select_speed,
1578 .get_last_session = ide_cdrom_get_last_session,
1579 .get_mcn = ide_cdrom_get_mcn,
1580 .reset = ide_cdrom_reset,
1581 .audio_ioctl = ide_cdrom_audio_ioctl,
1582 .capability = IDE_CD_CAPABILITIES,
1583 .generic_packet = ide_cdrom_packet,
1584 };
1585
1586 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1587 {
1588 struct cdrom_info *info = drive->driver_data;
1589 struct cdrom_device_info *devinfo = &info->devinfo;
1590
1591 devinfo->ops = &ide_cdrom_dops;
1592 devinfo->speed = info->current_speed;
1593 devinfo->capacity = nslots;
1594 devinfo->handle = drive;
1595 strcpy(devinfo->name, drive->name);
1596
1597 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1598 devinfo->mask |= CDC_SELECT_SPEED;
1599
1600 devinfo->disk = info->disk;
1601 return register_cdrom(devinfo);
1602 }
1603
1604 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1605 {
1606 struct cdrom_info *cd = drive->driver_data;
1607 struct cdrom_device_info *cdi = &cd->devinfo;
1608 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1609 mechtype_t mechtype;
1610 int nslots = 1;
1611
1612 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1613 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1614 CDC_MO_DRIVE | CDC_RAM);
1615
1616 if (drive->media == ide_optical) {
1617 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1618 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1619 drive->name);
1620 return nslots;
1621 }
1622
1623 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1624 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1625 cdi->mask &= ~CDC_PLAY_AUDIO;
1626 return nslots;
1627 }
1628
1629 /*
1630 * We have to cheat a little here. the packet will eventually be queued
1631 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1632 * Since this device hasn't been registered with the Uniform layer yet,
1633 * it can't do this. Same goes for cdi->ops.
1634 */
1635 cdi->handle = drive;
1636 cdi->ops = &ide_cdrom_dops;
1637
1638 if (ide_cdrom_get_capabilities(drive, buf))
1639 return 0;
1640
1641 if ((buf[8 + 6] & 0x01) == 0)
1642 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1643 if (buf[8 + 6] & 0x08)
1644 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1645 if (buf[8 + 3] & 0x01)
1646 cdi->mask &= ~CDC_CD_R;
1647 if (buf[8 + 3] & 0x02)
1648 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1649 if (buf[8 + 2] & 0x38)
1650 cdi->mask &= ~CDC_DVD;
1651 if (buf[8 + 3] & 0x20)
1652 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1653 if (buf[8 + 3] & 0x10)
1654 cdi->mask &= ~CDC_DVD_R;
1655 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1656 cdi->mask &= ~CDC_PLAY_AUDIO;
1657
1658 mechtype = buf[8 + 6] >> 5;
1659 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1660 cdi->mask |= CDC_CLOSE_TRAY;
1661
1662 if (cdi->sanyo_slot > 0) {
1663 cdi->mask &= ~CDC_SELECT_DISC;
1664 nslots = 3;
1665 } else if (mechtype == mechtype_individual_changer ||
1666 mechtype == mechtype_cartridge_changer) {
1667 nslots = cdrom_number_of_slots(cdi);
1668 if (nslots > 1)
1669 cdi->mask &= ~CDC_SELECT_DISC;
1670 }
1671
1672 ide_cdrom_update_speed(drive, buf);
1673
1674 printk(KERN_INFO "%s: ATAPI", drive->name);
1675
1676 /* don't print speed if the drive reported 0 */
1677 if (cd->max_speed)
1678 printk(KERN_CONT " %dX", cd->max_speed);
1679
1680 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1681
1682 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1683 printk(KERN_CONT " DVD%s%s",
1684 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1685 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1686
1687 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1688 printk(KERN_CONT " CD%s%s",
1689 (cdi->mask & CDC_CD_R) ? "" : "-R",
1690 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1691
1692 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1693 printk(KERN_CONT " changer w/%d slots", nslots);
1694 else
1695 printk(KERN_CONT " drive");
1696
1697 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1698
1699 return nslots;
1700 }
1701
1702 /* standard prep_rq_fn that builds 10 byte cmds */
1703 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1704 {
1705 int hard_sect = queue_hardsect_size(q);
1706 long block = (long)rq->hard_sector / (hard_sect >> 9);
1707 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1708
1709 memset(rq->cmd, 0, sizeof(rq->cmd));
1710
1711 if (rq_data_dir(rq) == READ)
1712 rq->cmd[0] = GPCMD_READ_10;
1713 else
1714 rq->cmd[0] = GPCMD_WRITE_10;
1715
1716 /*
1717 * fill in lba
1718 */
1719 rq->cmd[2] = (block >> 24) & 0xff;
1720 rq->cmd[3] = (block >> 16) & 0xff;
1721 rq->cmd[4] = (block >> 8) & 0xff;
1722 rq->cmd[5] = block & 0xff;
1723
1724 /*
1725 * and transfer length
1726 */
1727 rq->cmd[7] = (blocks >> 8) & 0xff;
1728 rq->cmd[8] = blocks & 0xff;
1729 rq->cmd_len = 10;
1730 return BLKPREP_OK;
1731 }
1732
1733 /*
1734 * Most of the SCSI commands are supported directly by ATAPI devices.
1735 * This transform handles the few exceptions.
1736 */
1737 static int ide_cdrom_prep_pc(struct request *rq)
1738 {
1739 u8 *c = rq->cmd;
1740
1741 /* transform 6-byte read/write commands to the 10-byte version */
1742 if (c[0] == READ_6 || c[0] == WRITE_6) {
1743 c[8] = c[4];
1744 c[5] = c[3];
1745 c[4] = c[2];
1746 c[3] = c[1] & 0x1f;
1747 c[2] = 0;
1748 c[1] &= 0xe0;
1749 c[0] += (READ_10 - READ_6);
1750 rq->cmd_len = 10;
1751 return BLKPREP_OK;
1752 }
1753
1754 /*
1755 * it's silly to pretend we understand 6-byte sense commands, just
1756 * reject with ILLEGAL_REQUEST and the caller should take the
1757 * appropriate action
1758 */
1759 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1760 rq->errors = ILLEGAL_REQUEST;
1761 return BLKPREP_KILL;
1762 }
1763
1764 return BLKPREP_OK;
1765 }
1766
1767 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1768 {
1769 if (blk_fs_request(rq))
1770 return ide_cdrom_prep_fs(q, rq);
1771 else if (blk_pc_request(rq))
1772 return ide_cdrom_prep_pc(rq);
1773
1774 return 0;
1775 }
1776
1777 struct cd_list_entry {
1778 const char *id_model;
1779 const char *id_firmware;
1780 unsigned int cd_flags;
1781 };
1782
1783 #ifdef CONFIG_IDE_PROC_FS
1784 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1785 {
1786 unsigned long capacity, sectors_per_frame;
1787
1788 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1789 return 0;
1790
1791 return capacity * sectors_per_frame;
1792 }
1793
1794 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1795 int count, int *eof, void *data)
1796 {
1797 ide_drive_t *drive = data;
1798 int len;
1799
1800 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1801 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1802 }
1803
1804 static ide_proc_entry_t idecd_proc[] = {
1805 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1806 { NULL, 0, NULL, NULL }
1807 };
1808
1809 static void ide_cdrom_add_settings(ide_drive_t *drive)
1810 {
1811 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1812 &drive->dsc_overlap, NULL);
1813 }
1814 #else
1815 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1816 #endif
1817
1818 static const struct cd_list_entry ide_cd_quirks_list[] = {
1819 /* Limit transfer size per interrupt. */
1820 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1821 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1822 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1823 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
1824 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1825 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1826 IDE_CD_FLAG_PRE_ATAPI12, },
1827 /* Vertos 300, some versions of this drive like to talk BCD. */
1828 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
1829 /* Vertos 600 ESD. */
1830 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
1831 /*
1832 * Sanyo 3 CD changer uses a non-standard command for CD changing
1833 * (by default standard ATAPI support for CD changers is used).
1834 */
1835 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
1836 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
1837 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
1838 /* Stingray 8X CD-ROM. */
1839 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1840 /*
1841 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1842 * mode sense page capabilities size, but older drives break.
1843 */
1844 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1845 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1846 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1847 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
1848 /*
1849 * Some drives used by Apple don't advertise audio play
1850 * but they do support reading TOC & audio datas.
1851 */
1852 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1853 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1854 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1855 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1856 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1857 { NULL, NULL, 0 }
1858 };
1859
1860 static unsigned int ide_cd_flags(struct hd_driveid *id)
1861 {
1862 const struct cd_list_entry *cle = ide_cd_quirks_list;
1863
1864 while (cle->id_model) {
1865 if (strcmp(cle->id_model, id->model) == 0 &&
1866 (cle->id_firmware == NULL ||
1867 strstr(id->fw_rev, cle->id_firmware)))
1868 return cle->cd_flags;
1869 cle++;
1870 }
1871
1872 return 0;
1873 }
1874
1875 static int ide_cdrom_setup(ide_drive_t *drive)
1876 {
1877 struct cdrom_info *cd = drive->driver_data;
1878 struct cdrom_device_info *cdi = &cd->devinfo;
1879 struct hd_driveid *id = drive->id;
1880 int nslots;
1881
1882 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1883 blk_queue_dma_alignment(drive->queue, 31);
1884 drive->queue->unplug_delay = (1 * HZ) / 1000;
1885 if (!drive->queue->unplug_delay)
1886 drive->queue->unplug_delay = 1;
1887
1888 drive->special.all = 0;
1889
1890 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1891 ide_cd_flags(id);
1892
1893 if ((id->config & 0x0060) == 0x20)
1894 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1895
1896 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1897 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1898 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1899 IDE_CD_FLAG_TOCADDR_AS_BCD);
1900 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1901 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1902 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1903 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1904 /* 3 => use CD in slot 0 */
1905 cdi->sanyo_slot = 3;
1906
1907 nslots = ide_cdrom_probe_capabilities(drive);
1908
1909 /* set correct block size */
1910 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1911
1912 if (drive->autotune == IDE_TUNE_DEFAULT ||
1913 drive->autotune == IDE_TUNE_AUTO)
1914 drive->dsc_overlap = (drive->next != drive);
1915
1916 if (ide_cdrom_register(drive, nslots)) {
1917 printk(KERN_ERR "%s: %s failed to register device with the"
1918 " cdrom driver.\n", drive->name, __func__);
1919 cd->devinfo.handle = NULL;
1920 return 1;
1921 }
1922 ide_cdrom_add_settings(drive);
1923 return 0;
1924 }
1925
1926 static void ide_cd_remove(ide_drive_t *drive)
1927 {
1928 struct cdrom_info *info = drive->driver_data;
1929
1930 ide_proc_unregister_driver(drive, info->driver);
1931
1932 del_gendisk(info->disk);
1933
1934 ide_cd_put(info);
1935 }
1936
1937 static void ide_cd_release(struct kref *kref)
1938 {
1939 struct cdrom_info *info = to_ide_cd(kref);
1940 struct cdrom_device_info *devinfo = &info->devinfo;
1941 ide_drive_t *drive = info->drive;
1942 struct gendisk *g = info->disk;
1943
1944 kfree(info->toc);
1945 if (devinfo->handle == drive)
1946 unregister_cdrom(devinfo);
1947 drive->dsc_overlap = 0;
1948 drive->driver_data = NULL;
1949 blk_queue_prep_rq(drive->queue, NULL);
1950 g->private_data = NULL;
1951 put_disk(g);
1952 kfree(info);
1953 }
1954
1955 static int ide_cd_probe(ide_drive_t *);
1956
1957 static ide_driver_t ide_cdrom_driver = {
1958 .gen_driver = {
1959 .owner = THIS_MODULE,
1960 .name = "ide-cdrom",
1961 .bus = &ide_bus_type,
1962 },
1963 .probe = ide_cd_probe,
1964 .remove = ide_cd_remove,
1965 .version = IDECD_VERSION,
1966 .media = ide_cdrom,
1967 .supports_dsc_overlap = 1,
1968 .do_request = ide_do_rw_cdrom,
1969 .end_request = ide_end_request,
1970 .error = __ide_error,
1971 .abort = __ide_abort,
1972 #ifdef CONFIG_IDE_PROC_FS
1973 .proc = idecd_proc,
1974 #endif
1975 };
1976
1977 static int idecd_open(struct inode *inode, struct file *file)
1978 {
1979 struct gendisk *disk = inode->i_bdev->bd_disk;
1980 struct cdrom_info *info;
1981 int rc = -ENOMEM;
1982
1983 info = ide_cd_get(disk);
1984 if (!info)
1985 return -ENXIO;
1986
1987 rc = cdrom_open(&info->devinfo, inode, file);
1988
1989 if (rc < 0)
1990 ide_cd_put(info);
1991
1992 return rc;
1993 }
1994
1995 static int idecd_release(struct inode *inode, struct file *file)
1996 {
1997 struct gendisk *disk = inode->i_bdev->bd_disk;
1998 struct cdrom_info *info = ide_cd_g(disk);
1999
2000 cdrom_release(&info->devinfo, file);
2001
2002 ide_cd_put(info);
2003
2004 return 0;
2005 }
2006
2007 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2008 {
2009 struct packet_command cgc;
2010 char buffer[16];
2011 int stat;
2012 char spindown;
2013
2014 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2015 return -EFAULT;
2016
2017 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2018
2019 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2020 if (stat)
2021 return stat;
2022
2023 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2024 return cdrom_mode_select(cdi, &cgc);
2025 }
2026
2027 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2028 {
2029 struct packet_command cgc;
2030 char buffer[16];
2031 int stat;
2032 char spindown;
2033
2034 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2035
2036 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2037 if (stat)
2038 return stat;
2039
2040 spindown = buffer[11] & 0x0f;
2041 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2042 return -EFAULT;
2043 return 0;
2044 }
2045
2046 static int idecd_ioctl(struct inode *inode, struct file *file,
2047 unsigned int cmd, unsigned long arg)
2048 {
2049 struct block_device *bdev = inode->i_bdev;
2050 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2051 int err;
2052
2053 switch (cmd) {
2054 case CDROMSETSPINDOWN:
2055 return idecd_set_spindown(&info->devinfo, arg);
2056 case CDROMGETSPINDOWN:
2057 return idecd_get_spindown(&info->devinfo, arg);
2058 default:
2059 break;
2060 }
2061
2062 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2063 if (err == -EINVAL)
2064 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2065
2066 return err;
2067 }
2068
2069 static int idecd_media_changed(struct gendisk *disk)
2070 {
2071 struct cdrom_info *info = ide_cd_g(disk);
2072 return cdrom_media_changed(&info->devinfo);
2073 }
2074
2075 static int idecd_revalidate_disk(struct gendisk *disk)
2076 {
2077 struct cdrom_info *info = ide_cd_g(disk);
2078 struct request_sense sense;
2079
2080 ide_cd_read_toc(info->drive, &sense);
2081
2082 return 0;
2083 }
2084
2085 static struct block_device_operations idecd_ops = {
2086 .owner = THIS_MODULE,
2087 .open = idecd_open,
2088 .release = idecd_release,
2089 .ioctl = idecd_ioctl,
2090 .media_changed = idecd_media_changed,
2091 .revalidate_disk = idecd_revalidate_disk
2092 };
2093
2094 /* module options */
2095 static char *ignore;
2096
2097 module_param(ignore, charp, 0400);
2098 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2099
2100 static int ide_cd_probe(ide_drive_t *drive)
2101 {
2102 struct cdrom_info *info;
2103 struct gendisk *g;
2104 struct request_sense sense;
2105
2106 if (!strstr("ide-cdrom", drive->driver_req))
2107 goto failed;
2108 if (!drive->present)
2109 goto failed;
2110 if (drive->media != ide_cdrom && drive->media != ide_optical)
2111 goto failed;
2112 /* skip drives that we were told to ignore */
2113 if (ignore != NULL) {
2114 if (strstr(ignore, drive->name)) {
2115 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2116 drive->name);
2117 goto failed;
2118 }
2119 }
2120 if (drive->scsi) {
2121 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi "
2122 "emulation.\n", drive->name);
2123 goto failed;
2124 }
2125 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2126 if (info == NULL) {
2127 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2128 drive->name);
2129 goto failed;
2130 }
2131
2132 g = alloc_disk(1 << PARTN_BITS);
2133 if (!g)
2134 goto out_free_cd;
2135
2136 ide_init_disk(g, drive);
2137
2138 ide_proc_register_driver(drive, &ide_cdrom_driver);
2139
2140 kref_init(&info->kref);
2141
2142 info->drive = drive;
2143 info->driver = &ide_cdrom_driver;
2144 info->disk = g;
2145
2146 g->private_data = &info->driver;
2147
2148 drive->driver_data = info;
2149
2150 g->minors = 1;
2151 g->driverfs_dev = &drive->gendev;
2152 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2153 if (ide_cdrom_setup(drive)) {
2154 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2155 ide_cd_release(&info->kref);
2156 goto failed;
2157 }
2158
2159 ide_cd_read_toc(drive, &sense);
2160 g->fops = &idecd_ops;
2161 g->flags |= GENHD_FL_REMOVABLE;
2162 add_disk(g);
2163 return 0;
2164
2165 out_free_cd:
2166 kfree(info);
2167 failed:
2168 return -ENODEV;
2169 }
2170
2171 static void __exit ide_cdrom_exit(void)
2172 {
2173 driver_unregister(&ide_cdrom_driver.gen_driver);
2174 }
2175
2176 static int __init ide_cdrom_init(void)
2177 {
2178 return driver_register(&ide_cdrom_driver.gen_driver);
2179 }
2180
2181 MODULE_ALIAS("ide:*m-cdrom*");
2182 MODULE_ALIAS("ide-cd");
2183 module_init(ide_cdrom_init);
2184 module_exit(ide_cdrom_exit);
2185 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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