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ide-cd: start DMA before sending the actual packet command
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob2cb301dccd218a279481fd6a9e4eccd047d1dfb9
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define DRV_NAME "ide-cd"
27 #define PFX DRV_NAME ": "
28
29 #define IDECD_VERSION "5.00"
30
31 #include <linux/module.h>
32 #include <linux/types.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <linux/cdrom.h>
40 #include <linux/ide.h>
41 #include <linux/completion.h>
42 #include <linux/mutex.h>
43 #include <linux/bcd.h>
44
45 /* For SCSI -> ATAPI command conversion */
46 #include <scsi/scsi.h>
47
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <asm/byteorder.h>
51 #include <linux/uaccess.h>
52 #include <asm/unaligned.h>
53
54 #include "ide-cd.h"
55
56 static DEFINE_MUTEX(idecd_ref_mutex);
57
58 static void ide_cd_release(struct kref *);
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_drv_g(disk, cdrom_info);
66 if (cd) {
67 if (ide_device_get(cd->drive))
68 cd = NULL;
69 else
70 kref_get(&cd->kref);
71
72 }
73 mutex_unlock(&idecd_ref_mutex);
74 return cd;
75 }
76
77 static void ide_cd_put(struct cdrom_info *cd)
78 {
79 ide_drive_t *drive = cd->drive;
80
81 mutex_lock(&idecd_ref_mutex);
82 kref_put(&cd->kref, ide_cd_release);
83 ide_device_put(drive);
84 mutex_unlock(&idecd_ref_mutex);
85 }
86
87 /*
88 * Generic packet command support and error handling routines.
89 */
90
91 /* Mark that we've seen a media change and invalidate our internal buffers. */
92 static void cdrom_saw_media_change(ide_drive_t *drive)
93 {
94 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
95 drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
96 }
97
98 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
99 struct request_sense *sense)
100 {
101 int log = 0;
102
103 ide_debug_log(IDE_DBG_SENSE, "Call %s, sense_key: 0x%x\n", __func__,
104 sense->sense_key);
105
106 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
107 return 0;
108
109 switch (sense->sense_key) {
110 case NO_SENSE:
111 case RECOVERED_ERROR:
112 break;
113 case NOT_READY:
114 /*
115 * don't care about tray state messages for e.g. capacity
116 * commands or in-progress or becoming ready
117 */
118 if (sense->asc == 0x3a || sense->asc == 0x04)
119 break;
120 log = 1;
121 break;
122 case ILLEGAL_REQUEST:
123 /*
124 * don't log START_STOP unit with LoEj set, since we cannot
125 * reliably check if drive can auto-close
126 */
127 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
128 break;
129 log = 1;
130 break;
131 case UNIT_ATTENTION:
132 /*
133 * Make good and sure we've seen this potential media change.
134 * Some drives (i.e. Creative) fail to present the correct sense
135 * key in the error register.
136 */
137 cdrom_saw_media_change(drive);
138 break;
139 default:
140 log = 1;
141 break;
142 }
143 return log;
144 }
145
146 static void cdrom_analyze_sense_data(ide_drive_t *drive,
147 struct request *failed_command,
148 struct request_sense *sense)
149 {
150 unsigned long sector;
151 unsigned long bio_sectors;
152 struct cdrom_info *info = drive->driver_data;
153
154 ide_debug_log(IDE_DBG_SENSE, "Call %s, error_code: 0x%x, "
155 "sense_key: 0x%x\n", __func__, sense->error_code,
156 sense->sense_key);
157
158 if (failed_command)
159 ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n",
160 __func__, failed_command->cmd[0]);
161
162 if (!cdrom_log_sense(drive, failed_command, sense))
163 return;
164
165 /*
166 * If a read toc is executed for a CD-R or CD-RW medium where the first
167 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
168 * confusing error)
169 */
170 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
171 if (sense->sense_key == 0x05 && sense->asc == 0x24)
172 return;
173
174 /* current error */
175 if (sense->error_code == 0x70) {
176 switch (sense->sense_key) {
177 case MEDIUM_ERROR:
178 case VOLUME_OVERFLOW:
179 case ILLEGAL_REQUEST:
180 if (!sense->valid)
181 break;
182 if (failed_command == NULL ||
183 !blk_fs_request(failed_command))
184 break;
185 sector = (sense->information[0] << 24) |
186 (sense->information[1] << 16) |
187 (sense->information[2] << 8) |
188 (sense->information[3]);
189
190 if (drive->queue->hardsect_size == 2048)
191 /* device sector size is 2K */
192 sector <<= 2;
193
194 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
195 sector &= ~(bio_sectors - 1);
196
197 if (sector < get_capacity(info->disk) &&
198 drive->probed_capacity - sector < 4 * 75)
199 set_capacity(info->disk, sector);
200 }
201 }
202
203 ide_cd_log_error(drive->name, failed_command, sense);
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 ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__);
213
214 if (sense == NULL)
215 sense = &info->sense_data;
216
217 /* stuff the sense request in front of our current request */
218 blk_rq_init(NULL, rq);
219 rq->cmd_type = REQ_TYPE_ATA_PC;
220 rq->rq_disk = info->disk;
221
222 rq->data = sense;
223 rq->cmd[0] = GPCMD_REQUEST_SENSE;
224 rq->cmd[4] = 18;
225 rq->data_len = 18;
226
227 rq->cmd_type = REQ_TYPE_SENSE;
228 rq->cmd_flags |= REQ_PREEMPT;
229
230 /* NOTE! Save the failed command in "rq->buffer" */
231 rq->buffer = (void *) failed_command;
232
233 if (failed_command)
234 ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n",
235 failed_command->cmd[0]);
236
237 ide_do_drive_cmd(drive, rq);
238 }
239
240 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
241 {
242 struct request *rq = drive->hwif->rq;
243 int nsectors = rq->hard_cur_sectors;
244
245 ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, "
246 "nsectors: %d\n", __func__, rq->cmd[0], uptodate,
247 nsectors);
248
249 if (blk_sense_request(rq) && uptodate) {
250 /*
251 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
252 * failed request
253 */
254 struct request *failed = (struct request *) rq->buffer;
255 struct cdrom_info *info = drive->driver_data;
256 void *sense = &info->sense_data;
257
258 if (failed) {
259 if (failed->sense) {
260 sense = failed->sense;
261 failed->sense_len = rq->sense_len;
262 }
263 cdrom_analyze_sense_data(drive, failed, sense);
264 /*
265 * now end the failed request
266 */
267 if (blk_fs_request(failed)) {
268 if (ide_end_dequeued_request(drive, failed, 0,
269 failed->hard_nr_sectors))
270 BUG();
271 } else {
272 if (blk_end_request(failed, -EIO,
273 failed->data_len))
274 BUG();
275 }
276 } else
277 cdrom_analyze_sense_data(drive, NULL, sense);
278 }
279
280 if (!rq->current_nr_sectors && blk_fs_request(rq))
281 uptodate = 1;
282 /* make sure it's fully ended */
283 if (blk_pc_request(rq))
284 nsectors = (rq->data_len + 511) >> 9;
285 if (!nsectors)
286 nsectors = 1;
287
288 ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n",
289 __func__, uptodate, nsectors);
290
291 ide_end_request(drive, uptodate, nsectors);
292 }
293
294 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
295 {
296 if (st & 0x80)
297 return;
298 ide_dump_status(drive, msg, st);
299 }
300
301 /*
302 * Returns:
303 * 0: if the request should be continued.
304 * 1: if the request was ended.
305 */
306 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
307 {
308 ide_hwif_t *hwif = drive->hwif;
309 struct request *rq = hwif->rq;
310 int stat, err, sense_key;
311
312 /* check for errors */
313 stat = hwif->tp_ops->read_status(hwif);
314
315 if (stat_ret)
316 *stat_ret = stat;
317
318 if (OK_STAT(stat, good_stat, BAD_R_STAT))
319 return 0;
320
321 /* get the IDE error register */
322 err = ide_read_error(drive);
323 sense_key = err >> 4;
324
325 if (rq == NULL) {
326 printk(KERN_ERR PFX "%s: missing rq in %s\n",
327 drive->name, __func__);
328 return 1;
329 }
330
331 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
332 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
333 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
334
335 if (blk_sense_request(rq)) {
336 /*
337 * We got an error trying to get sense info from the drive
338 * (probably while trying to recover from a former error).
339 * Just give up.
340 */
341 rq->cmd_flags |= REQ_FAILED;
342 cdrom_end_request(drive, 0);
343 ide_error(drive, "request sense failure", stat);
344 return 1;
345
346 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
347 /* All other functions, except for READ. */
348
349 /*
350 * if we have an error, pass back CHECK_CONDITION as the
351 * scsi status byte
352 */
353 if (blk_pc_request(rq) && !rq->errors)
354 rq->errors = SAM_STAT_CHECK_CONDITION;
355
356 /* check for tray open */
357 if (sense_key == NOT_READY) {
358 cdrom_saw_media_change(drive);
359 } else if (sense_key == UNIT_ATTENTION) {
360 /* check for media change */
361 cdrom_saw_media_change(drive);
362 return 0;
363 } else if (sense_key == ILLEGAL_REQUEST &&
364 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
365 /*
366 * Don't print error message for this condition--
367 * SFF8090i indicates that 5/24/00 is the correct
368 * response to a request to close the tray if the
369 * drive doesn't have that capability.
370 * cdrom_log_sense() knows this!
371 */
372 } else if (!(rq->cmd_flags & REQ_QUIET)) {
373 /* otherwise, print an error */
374 ide_dump_status(drive, "packet command error", stat);
375 }
376
377 rq->cmd_flags |= REQ_FAILED;
378
379 /*
380 * instead of playing games with moving completions around,
381 * remove failed request completely and end it when the
382 * request sense has completed
383 */
384 goto end_request;
385
386 } else if (blk_fs_request(rq)) {
387 int do_end_request = 0;
388
389 /* handle errors from READ and WRITE requests */
390
391 if (blk_noretry_request(rq))
392 do_end_request = 1;
393
394 if (sense_key == NOT_READY) {
395 /* tray open */
396 if (rq_data_dir(rq) == READ) {
397 cdrom_saw_media_change(drive);
398
399 /* fail the request */
400 printk(KERN_ERR PFX "%s: tray open\n",
401 drive->name);
402 do_end_request = 1;
403 } else {
404 struct cdrom_info *info = drive->driver_data;
405
406 /*
407 * Allow the drive 5 seconds to recover, some
408 * devices will return this error while flushing
409 * data from cache.
410 */
411 if (!rq->errors)
412 info->write_timeout = jiffies +
413 ATAPI_WAIT_WRITE_BUSY;
414 rq->errors = 1;
415 if (time_after(jiffies, info->write_timeout))
416 do_end_request = 1;
417 else {
418 struct request_queue *q = drive->queue;
419 unsigned long flags;
420
421 /*
422 * take a breather relying on the unplug
423 * timer to kick us again
424 */
425 spin_lock_irqsave(q->queue_lock, flags);
426 blk_plug_device(q);
427 spin_unlock_irqrestore(q->queue_lock, flags);
428
429 return 1;
430 }
431 }
432 } else if (sense_key == UNIT_ATTENTION) {
433 /* media change */
434 cdrom_saw_media_change(drive);
435
436 /*
437 * Arrange to retry the request but be sure to give up
438 * if we've retried too many times.
439 */
440 if (++rq->errors > ERROR_MAX)
441 do_end_request = 1;
442 } else if (sense_key == ILLEGAL_REQUEST ||
443 sense_key == DATA_PROTECT) {
444 /*
445 * No point in retrying after an illegal request or data
446 * protect error.
447 */
448 ide_dump_status_no_sense(drive, "command error", stat);
449 do_end_request = 1;
450 } else if (sense_key == MEDIUM_ERROR) {
451 /*
452 * No point in re-trying a zillion times on a bad
453 * sector. If we got here the error is not correctable.
454 */
455 ide_dump_status_no_sense(drive,
456 "media error (bad sector)",
457 stat);
458 do_end_request = 1;
459 } else if (sense_key == BLANK_CHECK) {
460 /* disk appears blank ?? */
461 ide_dump_status_no_sense(drive, "media error (blank)",
462 stat);
463 do_end_request = 1;
464 } else if ((err & ~ATA_ABORTED) != 0) {
465 /* go to the default handler for other errors */
466 ide_error(drive, "cdrom_decode_status", stat);
467 return 1;
468 } else if ((++rq->errors > ERROR_MAX)) {
469 /* we've racked up too many retries, abort */
470 do_end_request = 1;
471 }
472
473 /*
474 * End a request through request sense analysis when we have
475 * sense data. We need this in order to perform end of media
476 * processing.
477 */
478 if (do_end_request)
479 goto end_request;
480
481 /*
482 * If we got a CHECK_CONDITION status, queue
483 * a request sense command.
484 */
485 if (stat & ATA_ERR)
486 cdrom_queue_request_sense(drive, NULL, NULL);
487 } else {
488 blk_dump_rq_flags(rq, PFX "bad rq");
489 cdrom_end_request(drive, 0);
490 }
491
492 /* retry, or handle the next request */
493 return 1;
494
495 end_request:
496 if (stat & ATA_ERR) {
497 struct request_queue *q = drive->queue;
498 unsigned long flags;
499
500 spin_lock_irqsave(q->queue_lock, flags);
501 blkdev_dequeue_request(rq);
502 spin_unlock_irqrestore(q->queue_lock, flags);
503
504 hwif->rq = NULL;
505
506 cdrom_queue_request_sense(drive, rq->sense, rq);
507 } else
508 cdrom_end_request(drive, 0);
509
510 return 1;
511 }
512
513 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *);
514 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
515
516 /*
517 * Set up the device registers for transferring a packet command on DEV,
518 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
519 * which actually transfers the command to the drive. If this is a
520 * drq_interrupt device, this routine will arrange for HANDLER to be
521 * called when the interrupt from the drive arrives. Otherwise, HANDLER
522 * will be called immediately after the drive is prepared for the transfer.
523 */
524 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive)
525 {
526 ide_hwif_t *hwif = drive->hwif;
527 struct request *rq = hwif->rq;
528 int xferlen;
529
530 xferlen = ide_cd_get_xferlen(rq);
531
532 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
533
534 /* FIXME: for Virtual DMA we must check harder */
535 if (drive->dma)
536 drive->dma = !hwif->dma_ops->dma_setup(drive);
537
538 /* set up the controller registers */
539 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
540 xferlen, drive->dma);
541
542 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
543 /* waiting for CDB interrupt, not DMA yet. */
544 if (drive->dma)
545 drive->waiting_for_dma = 0;
546
547 /* packet command */
548 ide_execute_command(drive, ATA_CMD_PACKET,
549 cdrom_transfer_packet_command,
550 ATAPI_WAIT_PC, ide_cd_expiry);
551 return ide_started;
552 } else {
553 ide_execute_pkt_cmd(drive);
554
555 return cdrom_transfer_packet_command(drive);
556 }
557 }
558
559 /*
560 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
561 * registers must have already been prepared by cdrom_start_packet_command.
562 * HANDLER is the interrupt handler to call when the command completes or
563 * there's data ready.
564 */
565 #define ATAPI_MIN_CDB_BYTES 12
566 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive)
567 {
568 ide_hwif_t *hwif = drive->hwif;
569 struct request *rq = hwif->rq;
570 int cmd_len;
571 ide_startstop_t startstop;
572
573 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
574
575 /* we must wait for DRQ to get set */
576 if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
577 printk(KERN_ERR "%s: timeout while waiting for DRQ to assert\n",
578 drive->name);
579 return startstop;
580 }
581
582 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
583 /* ok, next interrupt will be DMA interrupt */
584 if (drive->dma)
585 drive->waiting_for_dma = 1;
586 }
587
588 /* arm the interrupt handler */
589 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, ide_cd_expiry);
590
591 /* ATAPI commands get padded out to 12 bytes minimum */
592 cmd_len = COMMAND_SIZE(rq->cmd[0]);
593 if (cmd_len < ATAPI_MIN_CDB_BYTES)
594 cmd_len = ATAPI_MIN_CDB_BYTES;
595
596 /* start the DMA if need be */
597 if (drive->dma)
598 hwif->dma_ops->dma_start(drive);
599
600 /* send the command to the device */
601 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
602
603 return ide_started;
604 }
605
606 /*
607 * Check the contents of the interrupt reason register from the cdrom
608 * and attempt to recover if there are problems. Returns 0 if everything's
609 * ok; nonzero if the request has been terminated.
610 */
611 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
612 int len, int ireason, int rw)
613 {
614 ide_hwif_t *hwif = drive->hwif;
615
616 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
617 __func__, ireason, rw);
618
619 /*
620 * ireason == 0: the drive wants to receive data from us
621 * ireason == 2: the drive is expecting to transfer data to us
622 */
623 if (ireason == (!rw << 1))
624 return 0;
625 else if (ireason == (rw << 1)) {
626
627 /* whoops... */
628 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
629 drive->name, __func__);
630
631 ide_pad_transfer(drive, rw, len);
632 } else if (rw == 0 && ireason == 1) {
633 /*
634 * Some drives (ASUS) seem to tell us that status info is
635 * available. Just get it and ignore.
636 */
637 (void)hwif->tp_ops->read_status(hwif);
638 return 0;
639 } else {
640 /* drive wants a command packet, or invalid ireason... */
641 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
642 drive->name, __func__, ireason);
643 }
644
645 if (rq->cmd_type == REQ_TYPE_ATA_PC)
646 rq->cmd_flags |= REQ_FAILED;
647
648 cdrom_end_request(drive, 0);
649 return -1;
650 }
651
652 /*
653 * Assume that the drive will always provide data in multiples of at least
654 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
655 */
656 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
657 {
658 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
659
660 if ((len % SECTOR_SIZE) == 0)
661 return 0;
662
663 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
664 __func__, len);
665
666 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
667 printk(KERN_ERR PFX "This drive is not supported by this "
668 "version of the driver\n");
669 else {
670 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
671 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
672 }
673
674 return 1;
675 }
676
677 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
678 struct request *rq)
679 {
680 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
681 rq->cmd_flags);
682
683 if (rq_data_dir(rq) == READ) {
684 unsigned short sectors_per_frame =
685 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
686 int nskip = rq->sector & (sectors_per_frame - 1);
687
688 /*
689 * If the requested sector doesn't start on a frame boundary,
690 * we must adjust the start of the transfer so that it does,
691 * and remember to skip the first few sectors.
692 *
693 * If the rq->current_nr_sectors field is larger than the size
694 * of the buffer, it will mean that we're to skip a number of
695 * sectors equal to the amount by which rq->current_nr_sectors
696 * is larger than the buffer size.
697 */
698 if (nskip > 0) {
699 /* sanity check... */
700 if (rq->current_nr_sectors !=
701 bio_cur_sectors(rq->bio)) {
702 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
703 drive->name, __func__,
704 rq->current_nr_sectors);
705 cdrom_end_request(drive, 0);
706 return ide_stopped;
707 }
708 rq->current_nr_sectors += nskip;
709 }
710 }
711
712 /* set up the command */
713 rq->timeout = ATAPI_WAIT_PC;
714
715 return ide_started;
716 }
717
718 /*
719 * Fix up a possibly partially-processed request so that we can start it over
720 * entirely, or even put it back on the request queue.
721 */
722 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
723 {
724
725 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
726
727 if (rq->buffer != bio_data(rq->bio)) {
728 sector_t n =
729 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
730
731 rq->buffer = bio_data(rq->bio);
732 rq->nr_sectors += n;
733 rq->sector -= n;
734 }
735 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
736 rq->hard_cur_sectors = rq->current_nr_sectors;
737 rq->hard_nr_sectors = rq->nr_sectors;
738 rq->hard_sector = rq->sector;
739 rq->q->prep_rq_fn(rq->q, rq);
740 }
741
742 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
743 {
744 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
745 __func__, rq->cmd[0]);
746
747 /*
748 * Some of the trailing request sense fields are optional,
749 * and some drives don't send them. Sigh.
750 */
751 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
752 rq->data_len > 0 && rq->data_len <= 5)
753 while (rq->data_len > 0) {
754 *(u8 *)rq->data++ = 0;
755 --rq->data_len;
756 }
757 }
758
759 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
760 int write, void *buffer, unsigned *bufflen,
761 struct request_sense *sense, int timeout,
762 unsigned int cmd_flags)
763 {
764 struct cdrom_info *info = drive->driver_data;
765 struct request_sense local_sense;
766 int retries = 10;
767 unsigned int flags = 0;
768
769 if (!sense)
770 sense = &local_sense;
771
772 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
773 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
774 timeout, cmd_flags);
775
776 /* start of retry loop */
777 do {
778 struct request *rq;
779 int error;
780
781 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
782
783 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
784 rq->cmd_type = REQ_TYPE_ATA_PC;
785 rq->sense = sense;
786 rq->cmd_flags |= cmd_flags;
787 rq->timeout = timeout;
788 if (buffer) {
789 rq->data = buffer;
790 rq->data_len = *bufflen;
791 }
792
793 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
794
795 if (buffer)
796 *bufflen = rq->data_len;
797
798 flags = rq->cmd_flags;
799 blk_put_request(rq);
800
801 /*
802 * FIXME: we should probably abort/retry or something in case of
803 * failure.
804 */
805 if (flags & REQ_FAILED) {
806 /*
807 * The request failed. Retry if it was due to a unit
808 * attention status (usually means media was changed).
809 */
810 struct request_sense *reqbuf = sense;
811
812 if (reqbuf->sense_key == UNIT_ATTENTION)
813 cdrom_saw_media_change(drive);
814 else if (reqbuf->sense_key == NOT_READY &&
815 reqbuf->asc == 4 && reqbuf->ascq != 4) {
816 /*
817 * The drive is in the process of loading
818 * a disk. Retry, but wait a little to give
819 * the drive time to complete the load.
820 */
821 ssleep(2);
822 } else {
823 /* otherwise, don't retry */
824 retries = 0;
825 }
826 --retries;
827 }
828
829 /* end of retry loop */
830 } while ((flags & REQ_FAILED) && retries >= 0);
831
832 /* return an error if the command failed */
833 return (flags & REQ_FAILED) ? -EIO : 0;
834 }
835
836 /*
837 * Called from blk_end_request_callback() after the data of the request is
838 * completed and before the request itself is completed. By returning value '1',
839 * blk_end_request_callback() returns immediately without completing it.
840 */
841 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
842 {
843 return 1;
844 }
845
846 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
847 {
848 ide_hwif_t *hwif = drive->hwif;
849 struct request *rq = hwif->rq;
850 xfer_func_t *xferfunc;
851 ide_expiry_t *expiry = NULL;
852 int dma_error = 0, dma, stat, thislen, uptodate = 0;
853 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
854 unsigned int timeout;
855 u16 len;
856 u8 ireason;
857
858 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
859 __func__, rq->cmd[0], write);
860
861 /* check for errors */
862 dma = drive->dma;
863 if (dma) {
864 drive->dma = 0;
865 dma_error = hwif->dma_ops->dma_end(drive);
866 if (dma_error) {
867 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
868 write ? "write" : "read");
869 ide_dma_off(drive);
870 }
871 }
872
873 if (cdrom_decode_status(drive, 0, &stat))
874 return ide_stopped;
875
876 /* using dma, transfer is complete now */
877 if (dma) {
878 if (dma_error)
879 return ide_error(drive, "dma error", stat);
880 if (blk_fs_request(rq)) {
881 ide_end_request(drive, 1, rq->nr_sectors);
882 return ide_stopped;
883 }
884 goto end_request;
885 }
886
887 ide_read_bcount_and_ireason(drive, &len, &ireason);
888
889 thislen = blk_fs_request(rq) ? len : rq->data_len;
890 if (thislen > len)
891 thislen = len;
892
893 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
894 __func__, stat, thislen);
895
896 /* If DRQ is clear, the command has completed. */
897 if ((stat & ATA_DRQ) == 0) {
898 if (blk_fs_request(rq)) {
899 /*
900 * If we're not done reading/writing, complain.
901 * Otherwise, complete the command normally.
902 */
903 uptodate = 1;
904 if (rq->current_nr_sectors > 0) {
905 printk(KERN_ERR PFX "%s: %s: data underrun "
906 "(%d blocks)\n",
907 drive->name, __func__,
908 rq->current_nr_sectors);
909 if (!write)
910 rq->cmd_flags |= REQ_FAILED;
911 uptodate = 0;
912 }
913 cdrom_end_request(drive, uptodate);
914 return ide_stopped;
915 } else if (!blk_pc_request(rq)) {
916 ide_cd_request_sense_fixup(drive, rq);
917 /* complain if we still have data left to transfer */
918 uptodate = rq->data_len ? 0 : 1;
919 }
920 goto end_request;
921 }
922
923 /* check which way to transfer data */
924 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
925 return ide_stopped;
926
927 if (blk_fs_request(rq)) {
928 if (write == 0) {
929 int nskip;
930
931 if (ide_cd_check_transfer_size(drive, len)) {
932 cdrom_end_request(drive, 0);
933 return ide_stopped;
934 }
935
936 /*
937 * First, figure out if we need to bit-bucket
938 * any of the leading sectors.
939 */
940 nskip = min_t(int, rq->current_nr_sectors
941 - bio_cur_sectors(rq->bio),
942 thislen >> 9);
943 if (nskip > 0) {
944 ide_pad_transfer(drive, write, nskip << 9);
945 rq->current_nr_sectors -= nskip;
946 thislen -= (nskip << 9);
947 }
948 }
949 }
950
951 if (ireason == 0) {
952 write = 1;
953 xferfunc = hwif->tp_ops->output_data;
954 } else {
955 write = 0;
956 xferfunc = hwif->tp_ops->input_data;
957 }
958
959 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
960 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
961
962 /* transfer data */
963 while (thislen > 0) {
964 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
965 int blen = rq->data_len;
966
967 /* bio backed? */
968 if (rq->bio) {
969 if (blk_fs_request(rq)) {
970 ptr = rq->buffer;
971 blen = rq->current_nr_sectors << 9;
972 } else {
973 ptr = bio_data(rq->bio);
974 blen = bio_iovec(rq->bio)->bv_len;
975 }
976 }
977
978 if (!ptr) {
979 if (blk_fs_request(rq) && !write)
980 /*
981 * If the buffers are full, pipe the rest into
982 * oblivion.
983 */
984 ide_pad_transfer(drive, 0, thislen);
985 else {
986 printk(KERN_ERR PFX "%s: confused, missing data\n",
987 drive->name);
988 blk_dump_rq_flags(rq, rq_data_dir(rq)
989 ? "cdrom_newpc_intr, write"
990 : "cdrom_newpc_intr, read");
991 }
992 break;
993 }
994
995 if (blen > thislen)
996 blen = thislen;
997
998 xferfunc(drive, NULL, ptr, blen);
999
1000 thislen -= blen;
1001 len -= blen;
1002
1003 if (blk_fs_request(rq)) {
1004 rq->buffer += blen;
1005 rq->nr_sectors -= (blen >> 9);
1006 rq->current_nr_sectors -= (blen >> 9);
1007 rq->sector += (blen >> 9);
1008
1009 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1010 cdrom_end_request(drive, 1);
1011 } else {
1012 rq->data_len -= blen;
1013
1014 /*
1015 * The request can't be completed until DRQ is cleared.
1016 * So complete the data, but don't complete the request
1017 * using the dummy function for the callback feature
1018 * of blk_end_request_callback().
1019 */
1020 if (rq->bio)
1021 blk_end_request_callback(rq, 0, blen,
1022 cdrom_newpc_intr_dummy_cb);
1023 else
1024 rq->data += blen;
1025 }
1026 if (!write && blk_sense_request(rq))
1027 rq->sense_len += blen;
1028 }
1029
1030 /* pad, if necessary */
1031 if (!blk_fs_request(rq) && len > 0)
1032 ide_pad_transfer(drive, write, len);
1033
1034 if (blk_pc_request(rq)) {
1035 timeout = rq->timeout;
1036 } else {
1037 timeout = ATAPI_WAIT_PC;
1038 if (!blk_fs_request(rq))
1039 expiry = ide_cd_expiry;
1040 }
1041
1042 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1043 return ide_started;
1044
1045 end_request:
1046 if (blk_pc_request(rq)) {
1047 unsigned int dlen = rq->data_len;
1048
1049 if (dma)
1050 rq->data_len = 0;
1051
1052 if (blk_end_request(rq, 0, dlen))
1053 BUG();
1054
1055 hwif->rq = NULL;
1056 } else {
1057 if (!uptodate)
1058 rq->cmd_flags |= REQ_FAILED;
1059 cdrom_end_request(drive, uptodate);
1060 }
1061 return ide_stopped;
1062 }
1063
1064 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1065 {
1066 struct cdrom_info *cd = drive->driver_data;
1067 int write = rq_data_dir(rq) == WRITE;
1068 unsigned short sectors_per_frame =
1069 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1070
1071 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1072 "secs_per_frame: %u\n",
1073 __func__, rq->cmd[0], write, sectors_per_frame);
1074
1075 if (write) {
1076 /* disk has become write protected */
1077 if (get_disk_ro(cd->disk)) {
1078 cdrom_end_request(drive, 0);
1079 return ide_stopped;
1080 }
1081 } else {
1082 /*
1083 * We may be retrying this request after an error. Fix up any
1084 * weirdness which might be present in the request packet.
1085 */
1086 ide_cd_restore_request(drive, rq);
1087 }
1088
1089 /* use DMA, if possible / writes *must* be hardware frame aligned */
1090 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1091 (rq->sector & (sectors_per_frame - 1))) {
1092 if (write) {
1093 cdrom_end_request(drive, 0);
1094 return ide_stopped;
1095 }
1096 drive->dma = 0;
1097 } else
1098 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1099
1100 if (write)
1101 cd->devinfo.media_written = 1;
1102
1103 return ide_started;
1104 }
1105
1106 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1107 {
1108
1109 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1110 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1111 rq->cmd_type);
1112
1113 if (blk_pc_request(rq))
1114 rq->cmd_flags |= REQ_QUIET;
1115 else
1116 rq->cmd_flags &= ~REQ_FAILED;
1117
1118 drive->dma = 0;
1119
1120 /* sg request */
1121 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1122 struct request_queue *q = drive->queue;
1123 unsigned int alignment;
1124 char *buf;
1125
1126 if (rq->bio)
1127 buf = bio_data(rq->bio);
1128 else
1129 buf = rq->data;
1130
1131 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1132
1133 /*
1134 * check if dma is safe
1135 *
1136 * NOTE! The "len" and "addr" checks should possibly have
1137 * separate masks.
1138 */
1139 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1140 if ((unsigned long)buf & alignment
1141 || rq->data_len & q->dma_pad_mask
1142 || object_is_on_stack(buf))
1143 drive->dma = 0;
1144 }
1145 }
1146
1147 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1148 sector_t block)
1149 {
1150 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1151 "rq->cmd_type: 0x%x, block: %llu\n",
1152 __func__, rq->cmd[0], rq->cmd_type,
1153 (unsigned long long)block);
1154
1155 if (blk_fs_request(rq)) {
1156 if (cdrom_start_rw(drive, rq) == ide_stopped)
1157 return ide_stopped;
1158
1159 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1160 return ide_stopped;
1161 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1162 rq->cmd_type == REQ_TYPE_ATA_PC) {
1163 if (!rq->timeout)
1164 rq->timeout = ATAPI_WAIT_PC;
1165
1166 cdrom_do_block_pc(drive, rq);
1167 } else if (blk_special_request(rq)) {
1168 /* right now this can only be a reset... */
1169 cdrom_end_request(drive, 1);
1170 return ide_stopped;
1171 } else {
1172 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1173 cdrom_end_request(drive, 0);
1174 return ide_stopped;
1175 }
1176
1177 return cdrom_start_packet_command(drive);
1178 }
1179
1180 /*
1181 * Ioctl handling.
1182 *
1183 * Routines which queue packet commands take as a final argument a pointer to a
1184 * request_sense struct. If execution of the command results in an error with a
1185 * CHECK CONDITION status, this structure will be filled with the results of the
1186 * subsequent request sense command. The pointer can also be NULL, in which case
1187 * no sense information is returned.
1188 */
1189 static void msf_from_bcd(struct atapi_msf *msf)
1190 {
1191 msf->minute = bcd2bin(msf->minute);
1192 msf->second = bcd2bin(msf->second);
1193 msf->frame = bcd2bin(msf->frame);
1194 }
1195
1196 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1197 {
1198 struct cdrom_info *info = drive->driver_data;
1199 struct cdrom_device_info *cdi = &info->devinfo;
1200 unsigned char cmd[BLK_MAX_CDB];
1201
1202 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1203
1204 memset(cmd, 0, BLK_MAX_CDB);
1205 cmd[0] = GPCMD_TEST_UNIT_READY;
1206
1207 /*
1208 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1209 * instead of supporting the LOAD_UNLOAD opcode.
1210 */
1211 cmd[7] = cdi->sanyo_slot % 3;
1212
1213 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1214 }
1215
1216 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1217 unsigned long *sectors_per_frame,
1218 struct request_sense *sense)
1219 {
1220 struct {
1221 __be32 lba;
1222 __be32 blocklen;
1223 } capbuf;
1224
1225 int stat;
1226 unsigned char cmd[BLK_MAX_CDB];
1227 unsigned len = sizeof(capbuf);
1228 u32 blocklen;
1229
1230 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1231
1232 memset(cmd, 0, BLK_MAX_CDB);
1233 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1234
1235 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1236 REQ_QUIET);
1237 if (stat)
1238 return stat;
1239
1240 /*
1241 * Sanity check the given block size
1242 */
1243 blocklen = be32_to_cpu(capbuf.blocklen);
1244 switch (blocklen) {
1245 case 512:
1246 case 1024:
1247 case 2048:
1248 case 4096:
1249 break;
1250 default:
1251 printk(KERN_ERR PFX "%s: weird block size %u\n",
1252 drive->name, blocklen);
1253 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1254 drive->name);
1255 blocklen = 2048;
1256 break;
1257 }
1258
1259 *capacity = 1 + be32_to_cpu(capbuf.lba);
1260 *sectors_per_frame = blocklen >> SECTOR_BITS;
1261
1262 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1263 __func__, *capacity, *sectors_per_frame);
1264
1265 return 0;
1266 }
1267
1268 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1269 int format, char *buf, int buflen,
1270 struct request_sense *sense)
1271 {
1272 unsigned char cmd[BLK_MAX_CDB];
1273
1274 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1275
1276 memset(cmd, 0, BLK_MAX_CDB);
1277
1278 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1279 cmd[6] = trackno;
1280 cmd[7] = (buflen >> 8);
1281 cmd[8] = (buflen & 0xff);
1282 cmd[9] = (format << 6);
1283
1284 if (msf_flag)
1285 cmd[1] = 2;
1286
1287 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1288 }
1289
1290 /* Try to read the entire TOC for the disk into our internal buffer. */
1291 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1292 {
1293 int stat, ntracks, i;
1294 struct cdrom_info *info = drive->driver_data;
1295 struct cdrom_device_info *cdi = &info->devinfo;
1296 struct atapi_toc *toc = info->toc;
1297 struct {
1298 struct atapi_toc_header hdr;
1299 struct atapi_toc_entry ent;
1300 } ms_tmp;
1301 long last_written;
1302 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1303
1304 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1305
1306 if (toc == NULL) {
1307 /* try to allocate space */
1308 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1309 if (toc == NULL) {
1310 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1311 drive->name);
1312 return -ENOMEM;
1313 }
1314 info->toc = toc;
1315 }
1316
1317 /*
1318 * Check to see if the existing data is still valid. If it is,
1319 * just return.
1320 */
1321 (void) cdrom_check_status(drive, sense);
1322
1323 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1324 return 0;
1325
1326 /* try to get the total cdrom capacity and sector size */
1327 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1328 sense);
1329 if (stat)
1330 toc->capacity = 0x1fffff;
1331
1332 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1333 /* save a private copy of the TOC capacity for error handling */
1334 drive->probed_capacity = toc->capacity * sectors_per_frame;
1335
1336 blk_queue_hardsect_size(drive->queue,
1337 sectors_per_frame << SECTOR_BITS);
1338
1339 /* first read just the header, so we know how long the TOC is */
1340 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1341 sizeof(struct atapi_toc_header), sense);
1342 if (stat)
1343 return stat;
1344
1345 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1346 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1347 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1348 }
1349
1350 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1351 if (ntracks <= 0)
1352 return -EIO;
1353 if (ntracks > MAX_TRACKS)
1354 ntracks = MAX_TRACKS;
1355
1356 /* now read the whole schmeer */
1357 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1358 (char *)&toc->hdr,
1359 sizeof(struct atapi_toc_header) +
1360 (ntracks + 1) *
1361 sizeof(struct atapi_toc_entry), sense);
1362
1363 if (stat && toc->hdr.first_track > 1) {
1364 /*
1365 * Cds with CDI tracks only don't have any TOC entries, despite
1366 * of this the returned values are
1367 * first_track == last_track = number of CDI tracks + 1,
1368 * so that this case is indistinguishable from the same layout
1369 * plus an additional audio track. If we get an error for the
1370 * regular case, we assume a CDI without additional audio
1371 * tracks. In this case the readable TOC is empty (CDI tracks
1372 * are not included) and only holds the Leadout entry.
1373 *
1374 * Heiko Eißfeldt.
1375 */
1376 ntracks = 0;
1377 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1378 (char *)&toc->hdr,
1379 sizeof(struct atapi_toc_header) +
1380 (ntracks + 1) *
1381 sizeof(struct atapi_toc_entry),
1382 sense);
1383 if (stat)
1384 return stat;
1385
1386 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1387 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1388 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1389 } else {
1390 toc->hdr.first_track = CDROM_LEADOUT;
1391 toc->hdr.last_track = CDROM_LEADOUT;
1392 }
1393 }
1394
1395 if (stat)
1396 return stat;
1397
1398 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1399
1400 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1401 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1402 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1403 }
1404
1405 for (i = 0; i <= ntracks; i++) {
1406 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1407 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1408 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1409 msf_from_bcd(&toc->ent[i].addr.msf);
1410 }
1411 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1412 toc->ent[i].addr.msf.second,
1413 toc->ent[i].addr.msf.frame);
1414 }
1415
1416 if (toc->hdr.first_track != CDROM_LEADOUT) {
1417 /* read the multisession information */
1418 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1419 sizeof(ms_tmp), sense);
1420 if (stat)
1421 return stat;
1422
1423 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1424 } else {
1425 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1426 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1427 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1428 }
1429
1430 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1431 /* re-read multisession information using MSF format */
1432 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1433 sizeof(ms_tmp), sense);
1434 if (stat)
1435 return stat;
1436
1437 msf_from_bcd(&ms_tmp.ent.addr.msf);
1438 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1439 ms_tmp.ent.addr.msf.second,
1440 ms_tmp.ent.addr.msf.frame);
1441 }
1442
1443 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1444
1445 /* now try to get the total cdrom capacity */
1446 stat = cdrom_get_last_written(cdi, &last_written);
1447 if (!stat && (last_written > toc->capacity)) {
1448 toc->capacity = last_written;
1449 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1450 drive->probed_capacity = toc->capacity * sectors_per_frame;
1451 }
1452
1453 /* Remember that we've read this stuff. */
1454 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1455
1456 return 0;
1457 }
1458
1459 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1460 {
1461 struct cdrom_info *info = drive->driver_data;
1462 struct cdrom_device_info *cdi = &info->devinfo;
1463 struct packet_command cgc;
1464 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1465
1466 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1467
1468 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1469 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1470
1471 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1472 do {
1473 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1474 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1475 if (!stat)
1476 break;
1477 } while (--attempts);
1478 return stat;
1479 }
1480
1481 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1482 {
1483 struct cdrom_info *cd = drive->driver_data;
1484 u16 curspeed, maxspeed;
1485
1486 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1487
1488 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1489 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1490 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1491 } else {
1492 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1493 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1494 }
1495
1496 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1497 __func__, curspeed, maxspeed);
1498
1499 cd->current_speed = (curspeed + (176/2)) / 176;
1500 cd->max_speed = (maxspeed + (176/2)) / 176;
1501 }
1502
1503 #define IDE_CD_CAPABILITIES \
1504 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1505 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1506 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1507 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1508 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1509
1510 static struct cdrom_device_ops ide_cdrom_dops = {
1511 .open = ide_cdrom_open_real,
1512 .release = ide_cdrom_release_real,
1513 .drive_status = ide_cdrom_drive_status,
1514 .media_changed = ide_cdrom_check_media_change_real,
1515 .tray_move = ide_cdrom_tray_move,
1516 .lock_door = ide_cdrom_lock_door,
1517 .select_speed = ide_cdrom_select_speed,
1518 .get_last_session = ide_cdrom_get_last_session,
1519 .get_mcn = ide_cdrom_get_mcn,
1520 .reset = ide_cdrom_reset,
1521 .audio_ioctl = ide_cdrom_audio_ioctl,
1522 .capability = IDE_CD_CAPABILITIES,
1523 .generic_packet = ide_cdrom_packet,
1524 };
1525
1526 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1527 {
1528 struct cdrom_info *info = drive->driver_data;
1529 struct cdrom_device_info *devinfo = &info->devinfo;
1530
1531 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1532
1533 devinfo->ops = &ide_cdrom_dops;
1534 devinfo->speed = info->current_speed;
1535 devinfo->capacity = nslots;
1536 devinfo->handle = drive;
1537 strcpy(devinfo->name, drive->name);
1538
1539 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1540 devinfo->mask |= CDC_SELECT_SPEED;
1541
1542 devinfo->disk = info->disk;
1543 return register_cdrom(devinfo);
1544 }
1545
1546 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1547 {
1548 struct cdrom_info *cd = drive->driver_data;
1549 struct cdrom_device_info *cdi = &cd->devinfo;
1550 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1551 mechtype_t mechtype;
1552 int nslots = 1;
1553
1554 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1555 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1556 drive->atapi_flags);
1557
1558 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1559 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1560 CDC_MO_DRIVE | CDC_RAM);
1561
1562 if (drive->media == ide_optical) {
1563 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1564 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1565 drive->name);
1566 return nslots;
1567 }
1568
1569 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1570 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1571 cdi->mask &= ~CDC_PLAY_AUDIO;
1572 return nslots;
1573 }
1574
1575 /*
1576 * We have to cheat a little here. the packet will eventually be queued
1577 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1578 * Since this device hasn't been registered with the Uniform layer yet,
1579 * it can't do this. Same goes for cdi->ops.
1580 */
1581 cdi->handle = drive;
1582 cdi->ops = &ide_cdrom_dops;
1583
1584 if (ide_cdrom_get_capabilities(drive, buf))
1585 return 0;
1586
1587 if ((buf[8 + 6] & 0x01) == 0)
1588 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1589 if (buf[8 + 6] & 0x08)
1590 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1591 if (buf[8 + 3] & 0x01)
1592 cdi->mask &= ~CDC_CD_R;
1593 if (buf[8 + 3] & 0x02)
1594 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1595 if (buf[8 + 2] & 0x38)
1596 cdi->mask &= ~CDC_DVD;
1597 if (buf[8 + 3] & 0x20)
1598 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1599 if (buf[8 + 3] & 0x10)
1600 cdi->mask &= ~CDC_DVD_R;
1601 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1602 cdi->mask &= ~CDC_PLAY_AUDIO;
1603
1604 mechtype = buf[8 + 6] >> 5;
1605 if (mechtype == mechtype_caddy ||
1606 mechtype == mechtype_popup ||
1607 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1608 cdi->mask |= CDC_CLOSE_TRAY;
1609
1610 if (cdi->sanyo_slot > 0) {
1611 cdi->mask &= ~CDC_SELECT_DISC;
1612 nslots = 3;
1613 } else if (mechtype == mechtype_individual_changer ||
1614 mechtype == mechtype_cartridge_changer) {
1615 nslots = cdrom_number_of_slots(cdi);
1616 if (nslots > 1)
1617 cdi->mask &= ~CDC_SELECT_DISC;
1618 }
1619
1620 ide_cdrom_update_speed(drive, buf);
1621
1622 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1623
1624 /* don't print speed if the drive reported 0 */
1625 if (cd->max_speed)
1626 printk(KERN_CONT " %dX", cd->max_speed);
1627
1628 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1629
1630 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1631 printk(KERN_CONT " DVD%s%s",
1632 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1633 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1634
1635 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1636 printk(KERN_CONT " CD%s%s",
1637 (cdi->mask & CDC_CD_R) ? "" : "-R",
1638 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1639
1640 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1641 printk(KERN_CONT " changer w/%d slots", nslots);
1642 else
1643 printk(KERN_CONT " drive");
1644
1645 printk(KERN_CONT ", %dkB Cache\n",
1646 be16_to_cpup((__be16 *)&buf[8 + 12]));
1647
1648 return nslots;
1649 }
1650
1651 /* standard prep_rq_fn that builds 10 byte cmds */
1652 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1653 {
1654 int hard_sect = queue_hardsect_size(q);
1655 long block = (long)rq->hard_sector / (hard_sect >> 9);
1656 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1657
1658 memset(rq->cmd, 0, BLK_MAX_CDB);
1659
1660 if (rq_data_dir(rq) == READ)
1661 rq->cmd[0] = GPCMD_READ_10;
1662 else
1663 rq->cmd[0] = GPCMD_WRITE_10;
1664
1665 /*
1666 * fill in lba
1667 */
1668 rq->cmd[2] = (block >> 24) & 0xff;
1669 rq->cmd[3] = (block >> 16) & 0xff;
1670 rq->cmd[4] = (block >> 8) & 0xff;
1671 rq->cmd[5] = block & 0xff;
1672
1673 /*
1674 * and transfer length
1675 */
1676 rq->cmd[7] = (blocks >> 8) & 0xff;
1677 rq->cmd[8] = blocks & 0xff;
1678 rq->cmd_len = 10;
1679 return BLKPREP_OK;
1680 }
1681
1682 /*
1683 * Most of the SCSI commands are supported directly by ATAPI devices.
1684 * This transform handles the few exceptions.
1685 */
1686 static int ide_cdrom_prep_pc(struct request *rq)
1687 {
1688 u8 *c = rq->cmd;
1689
1690 /* transform 6-byte read/write commands to the 10-byte version */
1691 if (c[0] == READ_6 || c[0] == WRITE_6) {
1692 c[8] = c[4];
1693 c[5] = c[3];
1694 c[4] = c[2];
1695 c[3] = c[1] & 0x1f;
1696 c[2] = 0;
1697 c[1] &= 0xe0;
1698 c[0] += (READ_10 - READ_6);
1699 rq->cmd_len = 10;
1700 return BLKPREP_OK;
1701 }
1702
1703 /*
1704 * it's silly to pretend we understand 6-byte sense commands, just
1705 * reject with ILLEGAL_REQUEST and the caller should take the
1706 * appropriate action
1707 */
1708 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1709 rq->errors = ILLEGAL_REQUEST;
1710 return BLKPREP_KILL;
1711 }
1712
1713 return BLKPREP_OK;
1714 }
1715
1716 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1717 {
1718 if (blk_fs_request(rq))
1719 return ide_cdrom_prep_fs(q, rq);
1720 else if (blk_pc_request(rq))
1721 return ide_cdrom_prep_pc(rq);
1722
1723 return 0;
1724 }
1725
1726 struct cd_list_entry {
1727 const char *id_model;
1728 const char *id_firmware;
1729 unsigned int cd_flags;
1730 };
1731
1732 #ifdef CONFIG_IDE_PROC_FS
1733 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1734 {
1735 unsigned long capacity, sectors_per_frame;
1736
1737 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1738 return 0;
1739
1740 return capacity * sectors_per_frame;
1741 }
1742
1743 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1744 int count, int *eof, void *data)
1745 {
1746 ide_drive_t *drive = data;
1747 int len;
1748
1749 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1750 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1751 }
1752
1753 static ide_proc_entry_t idecd_proc[] = {
1754 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1755 { NULL, 0, NULL, NULL }
1756 };
1757
1758 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1759 {
1760 return idecd_proc;
1761 }
1762
1763 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1764 {
1765 return NULL;
1766 }
1767 #endif
1768
1769 static const struct cd_list_entry ide_cd_quirks_list[] = {
1770 /* Limit transfer size per interrupt. */
1771 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1772 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1773 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1774 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1775 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1776 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1777 IDE_AFLAG_PRE_ATAPI12, },
1778 /* Vertos 300, some versions of this drive like to talk BCD. */
1779 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1780 /* Vertos 600 ESD. */
1781 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1782 /*
1783 * Sanyo 3 CD changer uses a non-standard command for CD changing
1784 * (by default standard ATAPI support for CD changers is used).
1785 */
1786 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1787 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1788 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1789 /* Stingray 8X CD-ROM. */
1790 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1791 /*
1792 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1793 * mode sense page capabilities size, but older drives break.
1794 */
1795 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1796 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1797 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1798 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1799 /*
1800 * Some drives used by Apple don't advertise audio play
1801 * but they do support reading TOC & audio datas.
1802 */
1803 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1804 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1805 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1806 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1807 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1808 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1809 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1810 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1811 { NULL, NULL, 0 }
1812 };
1813
1814 static unsigned int ide_cd_flags(u16 *id)
1815 {
1816 const struct cd_list_entry *cle = ide_cd_quirks_list;
1817
1818 while (cle->id_model) {
1819 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1820 (cle->id_firmware == NULL ||
1821 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1822 return cle->cd_flags;
1823 cle++;
1824 }
1825
1826 return 0;
1827 }
1828
1829 static int ide_cdrom_setup(ide_drive_t *drive)
1830 {
1831 struct cdrom_info *cd = drive->driver_data;
1832 struct cdrom_device_info *cdi = &cd->devinfo;
1833 u16 *id = drive->id;
1834 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1835 int nslots;
1836
1837 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1838
1839 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1840 blk_queue_dma_alignment(drive->queue, 31);
1841 blk_queue_update_dma_pad(drive->queue, 15);
1842 drive->queue->unplug_delay = (1 * HZ) / 1000;
1843 if (!drive->queue->unplug_delay)
1844 drive->queue->unplug_delay = 1;
1845
1846 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1847 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1848
1849 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1850 fw_rev[4] == '1' && fw_rev[6] <= '2')
1851 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1852 IDE_AFLAG_TOCADDR_AS_BCD);
1853 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1854 fw_rev[4] == '1' && fw_rev[6] <= '2')
1855 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1856 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1857 /* 3 => use CD in slot 0 */
1858 cdi->sanyo_slot = 3;
1859
1860 nslots = ide_cdrom_probe_capabilities(drive);
1861
1862 /* set correct block size */
1863 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1864
1865 if (ide_cdrom_register(drive, nslots)) {
1866 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1867 " cdrom driver.\n", drive->name, __func__);
1868 cd->devinfo.handle = NULL;
1869 return 1;
1870 }
1871
1872 ide_proc_register_driver(drive, cd->driver);
1873 return 0;
1874 }
1875
1876 static void ide_cd_remove(ide_drive_t *drive)
1877 {
1878 struct cdrom_info *info = drive->driver_data;
1879
1880 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1881
1882 ide_proc_unregister_driver(drive, info->driver);
1883
1884 del_gendisk(info->disk);
1885
1886 ide_cd_put(info);
1887 }
1888
1889 static void ide_cd_release(struct kref *kref)
1890 {
1891 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1892 struct cdrom_device_info *devinfo = &info->devinfo;
1893 ide_drive_t *drive = info->drive;
1894 struct gendisk *g = info->disk;
1895
1896 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1897
1898 kfree(info->toc);
1899 if (devinfo->handle == drive)
1900 unregister_cdrom(devinfo);
1901 drive->driver_data = NULL;
1902 blk_queue_prep_rq(drive->queue, NULL);
1903 g->private_data = NULL;
1904 put_disk(g);
1905 kfree(info);
1906 }
1907
1908 static int ide_cd_probe(ide_drive_t *);
1909
1910 static struct ide_driver ide_cdrom_driver = {
1911 .gen_driver = {
1912 .owner = THIS_MODULE,
1913 .name = "ide-cdrom",
1914 .bus = &ide_bus_type,
1915 },
1916 .probe = ide_cd_probe,
1917 .remove = ide_cd_remove,
1918 .version = IDECD_VERSION,
1919 .do_request = ide_cd_do_request,
1920 .end_request = ide_end_request,
1921 #ifdef CONFIG_IDE_PROC_FS
1922 .proc_entries = ide_cd_proc_entries,
1923 .proc_devsets = ide_cd_proc_devsets,
1924 #endif
1925 };
1926
1927 static int idecd_open(struct block_device *bdev, fmode_t mode)
1928 {
1929 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1930 int rc = -ENOMEM;
1931
1932 if (!info)
1933 return -ENXIO;
1934
1935 rc = cdrom_open(&info->devinfo, bdev, mode);
1936
1937 if (rc < 0)
1938 ide_cd_put(info);
1939
1940 return rc;
1941 }
1942
1943 static int idecd_release(struct gendisk *disk, fmode_t mode)
1944 {
1945 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1946
1947 cdrom_release(&info->devinfo, mode);
1948
1949 ide_cd_put(info);
1950
1951 return 0;
1952 }
1953
1954 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1955 {
1956 struct packet_command cgc;
1957 char buffer[16];
1958 int stat;
1959 char spindown;
1960
1961 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1962 return -EFAULT;
1963
1964 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1965
1966 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1967 if (stat)
1968 return stat;
1969
1970 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1971 return cdrom_mode_select(cdi, &cgc);
1972 }
1973
1974 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1975 {
1976 struct packet_command cgc;
1977 char buffer[16];
1978 int stat;
1979 char spindown;
1980
1981 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1982
1983 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1984 if (stat)
1985 return stat;
1986
1987 spindown = buffer[11] & 0x0f;
1988 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1989 return -EFAULT;
1990 return 0;
1991 }
1992
1993 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1994 unsigned int cmd, unsigned long arg)
1995 {
1996 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1997 int err;
1998
1999 switch (cmd) {
2000 case CDROMSETSPINDOWN:
2001 return idecd_set_spindown(&info->devinfo, arg);
2002 case CDROMGETSPINDOWN:
2003 return idecd_get_spindown(&info->devinfo, arg);
2004 default:
2005 break;
2006 }
2007
2008 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2009 if (err == -EINVAL)
2010 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2011
2012 return err;
2013 }
2014
2015 static int idecd_media_changed(struct gendisk *disk)
2016 {
2017 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2018 return cdrom_media_changed(&info->devinfo);
2019 }
2020
2021 static int idecd_revalidate_disk(struct gendisk *disk)
2022 {
2023 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2024 struct request_sense sense;
2025
2026 ide_cd_read_toc(info->drive, &sense);
2027
2028 return 0;
2029 }
2030
2031 static struct block_device_operations idecd_ops = {
2032 .owner = THIS_MODULE,
2033 .open = idecd_open,
2034 .release = idecd_release,
2035 .locked_ioctl = idecd_ioctl,
2036 .media_changed = idecd_media_changed,
2037 .revalidate_disk = idecd_revalidate_disk
2038 };
2039
2040 /* module options */
2041 static char *ignore;
2042 module_param(ignore, charp, 0400);
2043
2044 static unsigned long debug_mask;
2045 module_param(debug_mask, ulong, 0644);
2046
2047 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2048
2049 static int ide_cd_probe(ide_drive_t *drive)
2050 {
2051 struct cdrom_info *info;
2052 struct gendisk *g;
2053 struct request_sense sense;
2054
2055 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2056 "drive->media: 0x%x\n", __func__, drive->driver_req,
2057 drive->media);
2058
2059 if (!strstr("ide-cdrom", drive->driver_req))
2060 goto failed;
2061
2062 if (drive->media != ide_cdrom && drive->media != ide_optical)
2063 goto failed;
2064
2065 /* skip drives that we were told to ignore */
2066 if (ignore != NULL) {
2067 if (strstr(ignore, drive->name)) {
2068 printk(KERN_INFO PFX "ignoring drive %s\n",
2069 drive->name);
2070 goto failed;
2071 }
2072 }
2073
2074 drive->debug_mask = debug_mask;
2075
2076 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2077 if (info == NULL) {
2078 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2079 drive->name);
2080 goto failed;
2081 }
2082
2083 g = alloc_disk(1 << PARTN_BITS);
2084 if (!g)
2085 goto out_free_cd;
2086
2087 ide_init_disk(g, drive);
2088
2089 kref_init(&info->kref);
2090
2091 info->drive = drive;
2092 info->driver = &ide_cdrom_driver;
2093 info->disk = g;
2094
2095 g->private_data = &info->driver;
2096
2097 drive->driver_data = info;
2098
2099 g->minors = 1;
2100 g->driverfs_dev = &drive->gendev;
2101 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2102 if (ide_cdrom_setup(drive)) {
2103 ide_cd_release(&info->kref);
2104 goto failed;
2105 }
2106
2107 ide_cd_read_toc(drive, &sense);
2108 g->fops = &idecd_ops;
2109 g->flags |= GENHD_FL_REMOVABLE;
2110 add_disk(g);
2111 return 0;
2112
2113 out_free_cd:
2114 kfree(info);
2115 failed:
2116 return -ENODEV;
2117 }
2118
2119 static void __exit ide_cdrom_exit(void)
2120 {
2121 driver_unregister(&ide_cdrom_driver.gen_driver);
2122 }
2123
2124 static int __init ide_cdrom_init(void)
2125 {
2126 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2127 return driver_register(&ide_cdrom_driver.gen_driver);
2128 }
2129
2130 MODULE_ALIAS("ide:*m-cdrom*");
2131 MODULE_ALIAS("ide-cd");
2132 module_init(ide_cdrom_init);
2133 module_exit(ide_cdrom_exit);
2134 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree