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ide-atapi: accomodate transfer length calculation for ide-cd
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / ide-cd.c
blob8d3c7714682ed2e6316d58b487138c34415b4158
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 = HWGROUP(drive)->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 ide_hwgroup_t *hwgroup = hwif->hwgroup;
310 struct request *rq = hwgroup->rq;
311 int stat, err, sense_key;
312
313 /* check for errors */
314 stat = hwif->tp_ops->read_status(hwif);
315
316 if (stat_ret)
317 *stat_ret = stat;
318
319 if (OK_STAT(stat, good_stat, BAD_R_STAT))
320 return 0;
321
322 /* get the IDE error register */
323 err = ide_read_error(drive);
324 sense_key = err >> 4;
325
326 if (rq == NULL) {
327 printk(KERN_ERR PFX "%s: missing rq in %s\n",
328 drive->name, __func__);
329 return 1;
330 }
331
332 ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, "
333 "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n",
334 __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err);
335
336 if (blk_sense_request(rq)) {
337 /*
338 * We got an error trying to get sense info from the drive
339 * (probably while trying to recover from a former error).
340 * Just give up.
341 */
342 rq->cmd_flags |= REQ_FAILED;
343 cdrom_end_request(drive, 0);
344 ide_error(drive, "request sense failure", stat);
345 return 1;
346
347 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
348 /* All other functions, except for READ. */
349
350 /*
351 * if we have an error, pass back CHECK_CONDITION as the
352 * scsi status byte
353 */
354 if (blk_pc_request(rq) && !rq->errors)
355 rq->errors = SAM_STAT_CHECK_CONDITION;
356
357 /* check for tray open */
358 if (sense_key == NOT_READY) {
359 cdrom_saw_media_change(drive);
360 } else if (sense_key == UNIT_ATTENTION) {
361 /* check for media change */
362 cdrom_saw_media_change(drive);
363 return 0;
364 } else if (sense_key == ILLEGAL_REQUEST &&
365 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
366 /*
367 * Don't print error message for this condition--
368 * SFF8090i indicates that 5/24/00 is the correct
369 * response to a request to close the tray if the
370 * drive doesn't have that capability.
371 * cdrom_log_sense() knows this!
372 */
373 } else if (!(rq->cmd_flags & REQ_QUIET)) {
374 /* otherwise, print an error */
375 ide_dump_status(drive, "packet command error", stat);
376 }
377
378 rq->cmd_flags |= REQ_FAILED;
379
380 /*
381 * instead of playing games with moving completions around,
382 * remove failed request completely and end it when the
383 * request sense has completed
384 */
385 goto end_request;
386
387 } else if (blk_fs_request(rq)) {
388 int do_end_request = 0;
389
390 /* handle errors from READ and WRITE requests */
391
392 if (blk_noretry_request(rq))
393 do_end_request = 1;
394
395 if (sense_key == NOT_READY) {
396 /* tray open */
397 if (rq_data_dir(rq) == READ) {
398 cdrom_saw_media_change(drive);
399
400 /* fail the request */
401 printk(KERN_ERR PFX "%s: tray open\n",
402 drive->name);
403 do_end_request = 1;
404 } else {
405 struct cdrom_info *info = drive->driver_data;
406
407 /*
408 * Allow the drive 5 seconds to recover, some
409 * devices will return this error while flushing
410 * data from cache.
411 */
412 if (!rq->errors)
413 info->write_timeout = jiffies +
414 ATAPI_WAIT_WRITE_BUSY;
415 rq->errors = 1;
416 if (time_after(jiffies, info->write_timeout))
417 do_end_request = 1;
418 else {
419 struct request_queue *q = drive->queue;
420 unsigned long flags;
421
422 /*
423 * take a breather relying on the unplug
424 * timer to kick us again
425 */
426 spin_lock_irqsave(q->queue_lock, flags);
427 blk_plug_device(q);
428 spin_unlock_irqrestore(q->queue_lock, flags);
429
430 return 1;
431 }
432 }
433 } else if (sense_key == UNIT_ATTENTION) {
434 /* media change */
435 cdrom_saw_media_change(drive);
436
437 /*
438 * Arrange to retry the request but be sure to give up
439 * if we've retried too many times.
440 */
441 if (++rq->errors > ERROR_MAX)
442 do_end_request = 1;
443 } else if (sense_key == ILLEGAL_REQUEST ||
444 sense_key == DATA_PROTECT) {
445 /*
446 * No point in retrying after an illegal request or data
447 * protect error.
448 */
449 ide_dump_status_no_sense(drive, "command error", stat);
450 do_end_request = 1;
451 } else if (sense_key == MEDIUM_ERROR) {
452 /*
453 * No point in re-trying a zillion times on a bad
454 * sector. If we got here the error is not correctable.
455 */
456 ide_dump_status_no_sense(drive,
457 "media error (bad sector)",
458 stat);
459 do_end_request = 1;
460 } else if (sense_key == BLANK_CHECK) {
461 /* disk appears blank ?? */
462 ide_dump_status_no_sense(drive, "media error (blank)",
463 stat);
464 do_end_request = 1;
465 } else if ((err & ~ATA_ABORTED) != 0) {
466 /* go to the default handler for other errors */
467 ide_error(drive, "cdrom_decode_status", stat);
468 return 1;
469 } else if ((++rq->errors > ERROR_MAX)) {
470 /* we've racked up too many retries, abort */
471 do_end_request = 1;
472 }
473
474 /*
475 * End a request through request sense analysis when we have
476 * sense data. We need this in order to perform end of media
477 * processing.
478 */
479 if (do_end_request)
480 goto end_request;
481
482 /*
483 * If we got a CHECK_CONDITION status, queue
484 * a request sense command.
485 */
486 if (stat & ATA_ERR)
487 cdrom_queue_request_sense(drive, NULL, NULL);
488 } else {
489 blk_dump_rq_flags(rq, PFX "bad rq");
490 cdrom_end_request(drive, 0);
491 }
492
493 /* retry, or handle the next request */
494 return 1;
495
496 end_request:
497 if (stat & ATA_ERR) {
498 struct request_queue *q = drive->queue;
499 unsigned long flags;
500
501 spin_lock_irqsave(q->queue_lock, flags);
502 blkdev_dequeue_request(rq);
503 spin_unlock_irqrestore(q->queue_lock, flags);
504
505 hwgroup->rq = NULL;
506
507 cdrom_queue_request_sense(drive, rq->sense, rq);
508 } else
509 cdrom_end_request(drive, 0);
510
511 return 1;
512 }
513
514 static int cdrom_timer_expiry(ide_drive_t *drive)
515 {
516 struct request *rq = HWGROUP(drive)->rq;
517 unsigned long wait = 0;
518
519 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__,
520 rq->cmd[0]);
521
522 /*
523 * Some commands are *slow* and normally take a long time to complete.
524 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
525 * commands/drives support that. Let ide_timer_expiry keep polling us
526 * for these.
527 */
528 switch (rq->cmd[0]) {
529 case GPCMD_BLANK:
530 case GPCMD_FORMAT_UNIT:
531 case GPCMD_RESERVE_RZONE_TRACK:
532 case GPCMD_CLOSE_TRACK:
533 case GPCMD_FLUSH_CACHE:
534 wait = ATAPI_WAIT_PC;
535 break;
536 default:
537 if (!(rq->cmd_flags & REQ_QUIET))
538 printk(KERN_INFO PFX "cmd 0x%x timed out\n",
539 rq->cmd[0]);
540 wait = 0;
541 break;
542 }
543 return wait;
544 }
545
546 /*
547 * Set up the device registers for transferring a packet command on DEV,
548 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
549 * which actually transfers the command to the drive. If this is a
550 * drq_interrupt device, this routine will arrange for HANDLER to be
551 * called when the interrupt from the drive arrives. Otherwise, HANDLER
552 * will be called immediately after the drive is prepared for the transfer.
553 */
554 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
555 int xferlen,
556 ide_handler_t *handler)
557 {
558 ide_hwif_t *hwif = drive->hwif;
559
560 ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen);
561
562 /* FIXME: for Virtual DMA we must check harder */
563 if (drive->dma)
564 drive->dma = !hwif->dma_ops->dma_setup(drive);
565
566 /* set up the controller registers */
567 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
568 xferlen, drive->dma);
569
570 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
571 /* waiting for CDB interrupt, not DMA yet. */
572 if (drive->dma)
573 drive->waiting_for_dma = 0;
574
575 /* packet command */
576 ide_execute_command(drive, ATA_CMD_PACKET, handler,
577 ATAPI_WAIT_PC, cdrom_timer_expiry);
578 return ide_started;
579 } else {
580 ide_execute_pkt_cmd(drive);
581
582 return (*handler) (drive);
583 }
584 }
585
586 /*
587 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
588 * registers must have already been prepared by cdrom_start_packet_command.
589 * HANDLER is the interrupt handler to call when the command completes or
590 * there's data ready.
591 */
592 #define ATAPI_MIN_CDB_BYTES 12
593 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
594 struct request *rq,
595 ide_handler_t *handler)
596 {
597 ide_hwif_t *hwif = drive->hwif;
598 int cmd_len;
599 ide_startstop_t startstop;
600
601 ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__);
602
603 if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
604 /*
605 * Here we should have been called after receiving an interrupt
606 * from the device. DRQ should how be set.
607 */
608
609 /* check for errors */
610 if (cdrom_decode_status(drive, ATA_DRQ, NULL))
611 return ide_stopped;
612
613 /* ok, next interrupt will be DMA interrupt */
614 if (drive->dma)
615 drive->waiting_for_dma = 1;
616 } else {
617 /* otherwise, we must wait for DRQ to get set */
618 if (ide_wait_stat(&startstop, drive, ATA_DRQ,
619 ATA_BUSY, WAIT_READY))
620 return startstop;
621 }
622
623 /* arm the interrupt handler */
624 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
625
626 /* ATAPI commands get padded out to 12 bytes minimum */
627 cmd_len = COMMAND_SIZE(rq->cmd[0]);
628 if (cmd_len < ATAPI_MIN_CDB_BYTES)
629 cmd_len = ATAPI_MIN_CDB_BYTES;
630
631 /* send the command to the device */
632 hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
633
634 /* start the DMA if need be */
635 if (drive->dma)
636 hwif->dma_ops->dma_start(drive);
637
638 return ide_started;
639 }
640
641 /*
642 * Check the contents of the interrupt reason register from the cdrom
643 * and attempt to recover if there are problems. Returns 0 if everything's
644 * ok; nonzero if the request has been terminated.
645 */
646 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
647 int len, int ireason, int rw)
648 {
649 ide_hwif_t *hwif = drive->hwif;
650
651 ide_debug_log(IDE_DBG_FUNC, "Call %s, ireason: 0x%x, rw: 0x%x\n",
652 __func__, ireason, rw);
653
654 /*
655 * ireason == 0: the drive wants to receive data from us
656 * ireason == 2: the drive is expecting to transfer data to us
657 */
658 if (ireason == (!rw << 1))
659 return 0;
660 else if (ireason == (rw << 1)) {
661
662 /* whoops... */
663 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
664 drive->name, __func__);
665
666 ide_pad_transfer(drive, rw, len);
667 } else if (rw == 0 && ireason == 1) {
668 /*
669 * Some drives (ASUS) seem to tell us that status info is
670 * available. Just get it and ignore.
671 */
672 (void)hwif->tp_ops->read_status(hwif);
673 return 0;
674 } else {
675 /* drive wants a command packet, or invalid ireason... */
676 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
677 drive->name, __func__, ireason);
678 }
679
680 if (rq->cmd_type == REQ_TYPE_ATA_PC)
681 rq->cmd_flags |= REQ_FAILED;
682
683 cdrom_end_request(drive, 0);
684 return -1;
685 }
686
687 /*
688 * Assume that the drive will always provide data in multiples of at least
689 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
690 */
691 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
692 {
693 ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len);
694
695 if ((len % SECTOR_SIZE) == 0)
696 return 0;
697
698 printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
699 __func__, len);
700
701 if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
702 printk(KERN_ERR PFX "This drive is not supported by this "
703 "version of the driver\n");
704 else {
705 printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
706 drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
707 }
708
709 return 1;
710 }
711
712 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
713
714 static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
715 struct request *rq)
716 {
717 ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__,
718 rq->cmd_flags);
719
720 if (rq_data_dir(rq) == READ) {
721 unsigned short sectors_per_frame =
722 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
723 int nskip = rq->sector & (sectors_per_frame - 1);
724
725 /*
726 * If the requested sector doesn't start on a frame boundary,
727 * we must adjust the start of the transfer so that it does,
728 * and remember to skip the first few sectors.
729 *
730 * If the rq->current_nr_sectors field is larger than the size
731 * of the buffer, it will mean that we're to skip a number of
732 * sectors equal to the amount by which rq->current_nr_sectors
733 * is larger than the buffer size.
734 */
735 if (nskip > 0) {
736 /* sanity check... */
737 if (rq->current_nr_sectors !=
738 bio_cur_sectors(rq->bio)) {
739 printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
740 drive->name, __func__,
741 rq->current_nr_sectors);
742 cdrom_end_request(drive, 0);
743 return ide_stopped;
744 }
745 rq->current_nr_sectors += nskip;
746 }
747 }
748
749 /* set up the command */
750 rq->timeout = ATAPI_WAIT_PC;
751
752 return ide_started;
753 }
754
755 /*
756 * Routine to send a read/write packet command to the drive. This is usually
757 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
758 * devices, it is called from an interrupt when the drive is ready to accept
759 * the command.
760 */
761 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
762 {
763 struct request *rq = drive->hwif->hwgroup->rq;
764
765 /* send the command to the drive and return */
766 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
767 }
768
769 /*
770 * Fix up a possibly partially-processed request so that we can start it over
771 * entirely, or even put it back on the request queue.
772 */
773 static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
774 {
775
776 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
777
778 if (rq->buffer != bio_data(rq->bio)) {
779 sector_t n =
780 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
781
782 rq->buffer = bio_data(rq->bio);
783 rq->nr_sectors += n;
784 rq->sector -= n;
785 }
786 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
787 rq->hard_cur_sectors = rq->current_nr_sectors;
788 rq->hard_nr_sectors = rq->nr_sectors;
789 rq->hard_sector = rq->sector;
790 rq->q->prep_rq_fn(rq->q, rq);
791 }
792
793 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
794 {
795 ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n",
796 __func__, rq->cmd[0]);
797
798 /*
799 * Some of the trailing request sense fields are optional,
800 * and some drives don't send them. Sigh.
801 */
802 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
803 rq->data_len > 0 && rq->data_len <= 5)
804 while (rq->data_len > 0) {
805 *(u8 *)rq->data++ = 0;
806 --rq->data_len;
807 }
808 }
809
810 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
811 int write, void *buffer, unsigned *bufflen,
812 struct request_sense *sense, int timeout,
813 unsigned int cmd_flags)
814 {
815 struct cdrom_info *info = drive->driver_data;
816 struct request_sense local_sense;
817 int retries = 10;
818 unsigned int flags = 0;
819
820 if (!sense)
821 sense = &local_sense;
822
823 ide_debug_log(IDE_DBG_PC, "Call %s, cmd[0]: 0x%x, write: 0x%x, "
824 "timeout: %d, cmd_flags: 0x%x\n", __func__, cmd[0], write,
825 timeout, cmd_flags);
826
827 /* start of retry loop */
828 do {
829 struct request *rq;
830 int error;
831
832 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
833
834 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
835 rq->cmd_type = REQ_TYPE_ATA_PC;
836 rq->sense = sense;
837 rq->cmd_flags |= cmd_flags;
838 rq->timeout = timeout;
839 if (buffer) {
840 rq->data = buffer;
841 rq->data_len = *bufflen;
842 }
843
844 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
845
846 if (buffer)
847 *bufflen = rq->data_len;
848
849 flags = rq->cmd_flags;
850 blk_put_request(rq);
851
852 /*
853 * FIXME: we should probably abort/retry or something in case of
854 * failure.
855 */
856 if (flags & REQ_FAILED) {
857 /*
858 * The request failed. Retry if it was due to a unit
859 * attention status (usually means media was changed).
860 */
861 struct request_sense *reqbuf = sense;
862
863 if (reqbuf->sense_key == UNIT_ATTENTION)
864 cdrom_saw_media_change(drive);
865 else if (reqbuf->sense_key == NOT_READY &&
866 reqbuf->asc == 4 && reqbuf->ascq != 4) {
867 /*
868 * The drive is in the process of loading
869 * a disk. Retry, but wait a little to give
870 * the drive time to complete the load.
871 */
872 ssleep(2);
873 } else {
874 /* otherwise, don't retry */
875 retries = 0;
876 }
877 --retries;
878 }
879
880 /* end of retry loop */
881 } while ((flags & REQ_FAILED) && retries >= 0);
882
883 /* return an error if the command failed */
884 return (flags & REQ_FAILED) ? -EIO : 0;
885 }
886
887 /*
888 * Called from blk_end_request_callback() after the data of the request is
889 * completed and before the request itself is completed. By returning value '1',
890 * blk_end_request_callback() returns immediately without completing it.
891 */
892 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
893 {
894 return 1;
895 }
896
897 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
898 {
899 ide_hwif_t *hwif = drive->hwif;
900 ide_hwgroup_t *hwgroup = hwif->hwgroup;
901 struct request *rq = hwgroup->rq;
902 xfer_func_t *xferfunc;
903 ide_expiry_t *expiry = NULL;
904 int dma_error = 0, dma, stat, thislen, uptodate = 0;
905 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
906 unsigned int timeout;
907 u16 len;
908 u8 ireason;
909
910 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n",
911 __func__, rq->cmd[0], write);
912
913 /* check for errors */
914 dma = drive->dma;
915 if (dma) {
916 drive->dma = 0;
917 dma_error = hwif->dma_ops->dma_end(drive);
918 if (dma_error) {
919 printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
920 write ? "write" : "read");
921 ide_dma_off(drive);
922 }
923 }
924
925 if (cdrom_decode_status(drive, 0, &stat))
926 return ide_stopped;
927
928 /* using dma, transfer is complete now */
929 if (dma) {
930 if (dma_error)
931 return ide_error(drive, "dma error", stat);
932 if (blk_fs_request(rq)) {
933 ide_end_request(drive, 1, rq->nr_sectors);
934 return ide_stopped;
935 }
936 goto end_request;
937 }
938
939 ide_read_bcount_and_ireason(drive, &len, &ireason);
940
941 thislen = blk_fs_request(rq) ? len : rq->data_len;
942 if (thislen > len)
943 thislen = len;
944
945 ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n",
946 __func__, stat, thislen);
947
948 /* If DRQ is clear, the command has completed. */
949 if ((stat & ATA_DRQ) == 0) {
950 if (blk_fs_request(rq)) {
951 /*
952 * If we're not done reading/writing, complain.
953 * Otherwise, complete the command normally.
954 */
955 uptodate = 1;
956 if (rq->current_nr_sectors > 0) {
957 printk(KERN_ERR PFX "%s: %s: data underrun "
958 "(%d blocks)\n",
959 drive->name, __func__,
960 rq->current_nr_sectors);
961 if (!write)
962 rq->cmd_flags |= REQ_FAILED;
963 uptodate = 0;
964 }
965 cdrom_end_request(drive, uptodate);
966 return ide_stopped;
967 } else if (!blk_pc_request(rq)) {
968 ide_cd_request_sense_fixup(drive, rq);
969 /* complain if we still have data left to transfer */
970 uptodate = rq->data_len ? 0 : 1;
971 }
972 goto end_request;
973 }
974
975 /* check which way to transfer data */
976 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
977 return ide_stopped;
978
979 if (blk_fs_request(rq)) {
980 if (write == 0) {
981 int nskip;
982
983 if (ide_cd_check_transfer_size(drive, len)) {
984 cdrom_end_request(drive, 0);
985 return ide_stopped;
986 }
987
988 /*
989 * First, figure out if we need to bit-bucket
990 * any of the leading sectors.
991 */
992 nskip = min_t(int, rq->current_nr_sectors
993 - bio_cur_sectors(rq->bio),
994 thislen >> 9);
995 if (nskip > 0) {
996 ide_pad_transfer(drive, write, nskip << 9);
997 rq->current_nr_sectors -= nskip;
998 thislen -= (nskip << 9);
999 }
1000 }
1001 }
1002
1003 if (ireason == 0) {
1004 write = 1;
1005 xferfunc = hwif->tp_ops->output_data;
1006 } else {
1007 write = 0;
1008 xferfunc = hwif->tp_ops->input_data;
1009 }
1010
1011 ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, "
1012 "ireason: 0x%x\n", __func__, rq->cmd_type, ireason);
1013
1014 /* transfer data */
1015 while (thislen > 0) {
1016 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1017 int blen = rq->data_len;
1018
1019 /* bio backed? */
1020 if (rq->bio) {
1021 if (blk_fs_request(rq)) {
1022 ptr = rq->buffer;
1023 blen = rq->current_nr_sectors << 9;
1024 } else {
1025 ptr = bio_data(rq->bio);
1026 blen = bio_iovec(rq->bio)->bv_len;
1027 }
1028 }
1029
1030 if (!ptr) {
1031 if (blk_fs_request(rq) && !write)
1032 /*
1033 * If the buffers are full, pipe the rest into
1034 * oblivion.
1035 */
1036 ide_pad_transfer(drive, 0, thislen);
1037 else {
1038 printk(KERN_ERR PFX "%s: confused, missing data\n",
1039 drive->name);
1040 blk_dump_rq_flags(rq, rq_data_dir(rq)
1041 ? "cdrom_newpc_intr, write"
1042 : "cdrom_newpc_intr, read");
1043 }
1044 break;
1045 }
1046
1047 if (blen > thislen)
1048 blen = thislen;
1049
1050 xferfunc(drive, NULL, ptr, blen);
1051
1052 thislen -= blen;
1053 len -= blen;
1054
1055 if (blk_fs_request(rq)) {
1056 rq->buffer += blen;
1057 rq->nr_sectors -= (blen >> 9);
1058 rq->current_nr_sectors -= (blen >> 9);
1059 rq->sector += (blen >> 9);
1060
1061 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1062 cdrom_end_request(drive, 1);
1063 } else {
1064 rq->data_len -= blen;
1065
1066 /*
1067 * The request can't be completed until DRQ is cleared.
1068 * So complete the data, but don't complete the request
1069 * using the dummy function for the callback feature
1070 * of blk_end_request_callback().
1071 */
1072 if (rq->bio)
1073 blk_end_request_callback(rq, 0, blen,
1074 cdrom_newpc_intr_dummy_cb);
1075 else
1076 rq->data += blen;
1077 }
1078 if (!write && blk_sense_request(rq))
1079 rq->sense_len += blen;
1080 }
1081
1082 /* pad, if necessary */
1083 if (!blk_fs_request(rq) && len > 0)
1084 ide_pad_transfer(drive, write, len);
1085
1086 if (blk_pc_request(rq)) {
1087 timeout = rq->timeout;
1088 } else {
1089 timeout = ATAPI_WAIT_PC;
1090 if (!blk_fs_request(rq))
1091 expiry = cdrom_timer_expiry;
1092 }
1093
1094 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1095 return ide_started;
1096
1097 end_request:
1098 if (blk_pc_request(rq)) {
1099 unsigned int dlen = rq->data_len;
1100
1101 if (dma)
1102 rq->data_len = 0;
1103
1104 if (blk_end_request(rq, 0, dlen))
1105 BUG();
1106
1107 hwgroup->rq = NULL;
1108 } else {
1109 if (!uptodate)
1110 rq->cmd_flags |= REQ_FAILED;
1111 cdrom_end_request(drive, uptodate);
1112 }
1113 return ide_stopped;
1114 }
1115
1116 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1117 {
1118 struct cdrom_info *cd = drive->driver_data;
1119 int write = rq_data_dir(rq) == WRITE;
1120 unsigned short sectors_per_frame =
1121 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1122
1123 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, "
1124 "secs_per_frame: %u\n",
1125 __func__, rq->cmd[0], write, sectors_per_frame);
1126
1127 if (write) {
1128 /* disk has become write protected */
1129 if (get_disk_ro(cd->disk)) {
1130 cdrom_end_request(drive, 0);
1131 return ide_stopped;
1132 }
1133 } else {
1134 /*
1135 * We may be retrying this request after an error. Fix up any
1136 * weirdness which might be present in the request packet.
1137 */
1138 ide_cd_restore_request(drive, rq);
1139 }
1140
1141 /* use DMA, if possible / writes *must* be hardware frame aligned */
1142 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1143 (rq->sector & (sectors_per_frame - 1))) {
1144 if (write) {
1145 cdrom_end_request(drive, 0);
1146 return ide_stopped;
1147 }
1148 drive->dma = 0;
1149 } else
1150 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1151
1152 if (write)
1153 cd->devinfo.media_written = 1;
1154
1155 return ide_started;
1156 }
1157
1158 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1159 {
1160 struct request *rq = HWGROUP(drive)->rq;
1161
1162 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1163 }
1164
1165 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1166 {
1167
1168 ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, "
1169 "rq->cmd_type: 0x%x\n", __func__, rq->cmd[0],
1170 rq->cmd_type);
1171
1172 if (blk_pc_request(rq))
1173 rq->cmd_flags |= REQ_QUIET;
1174 else
1175 rq->cmd_flags &= ~REQ_FAILED;
1176
1177 drive->dma = 0;
1178
1179 /* sg request */
1180 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1181 struct request_queue *q = drive->queue;
1182 unsigned int alignment;
1183 char *buf;
1184
1185 if (rq->bio)
1186 buf = bio_data(rq->bio);
1187 else
1188 buf = rq->data;
1189
1190 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
1191
1192 /*
1193 * check if dma is safe
1194 *
1195 * NOTE! The "len" and "addr" checks should possibly have
1196 * separate masks.
1197 */
1198 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1199 if ((unsigned long)buf & alignment
1200 || rq->data_len & q->dma_pad_mask
1201 || object_is_on_stack(buf))
1202 drive->dma = 0;
1203 }
1204 }
1205
1206 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
1207 sector_t block)
1208 {
1209 ide_handler_t *fn;
1210 int xferlen;
1211
1212 ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, "
1213 "rq->cmd_type: 0x%x, block: %llu\n",
1214 __func__, rq->cmd[0], rq->cmd_type,
1215 (unsigned long long)block);
1216
1217 xferlen = ide_cd_get_xferlen(rq);
1218
1219 if (blk_fs_request(rq)) {
1220 fn = cdrom_start_rw_cont;
1221
1222 if (cdrom_start_rw(drive, rq) == ide_stopped)
1223 return ide_stopped;
1224
1225 if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
1226 return ide_stopped;
1227 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1228 rq->cmd_type == REQ_TYPE_ATA_PC) {
1229 fn = cdrom_do_newpc_cont;
1230
1231 if (!rq->timeout)
1232 rq->timeout = ATAPI_WAIT_PC;
1233
1234 cdrom_do_block_pc(drive, rq);
1235 } else if (blk_special_request(rq)) {
1236 /* right now this can only be a reset... */
1237 cdrom_end_request(drive, 1);
1238 return ide_stopped;
1239 } else {
1240 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
1241 cdrom_end_request(drive, 0);
1242 return ide_stopped;
1243 }
1244
1245 return cdrom_start_packet_command(drive, xferlen, fn);
1246 }
1247
1248 /*
1249 * Ioctl handling.
1250 *
1251 * Routines which queue packet commands take as a final argument a pointer to a
1252 * request_sense struct. If execution of the command results in an error with a
1253 * CHECK CONDITION status, this structure will be filled with the results of the
1254 * subsequent request sense command. The pointer can also be NULL, in which case
1255 * no sense information is returned.
1256 */
1257 static void msf_from_bcd(struct atapi_msf *msf)
1258 {
1259 msf->minute = bcd2bin(msf->minute);
1260 msf->second = bcd2bin(msf->second);
1261 msf->frame = bcd2bin(msf->frame);
1262 }
1263
1264 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1265 {
1266 struct cdrom_info *info = drive->driver_data;
1267 struct cdrom_device_info *cdi = &info->devinfo;
1268 unsigned char cmd[BLK_MAX_CDB];
1269
1270 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1271
1272 memset(cmd, 0, BLK_MAX_CDB);
1273 cmd[0] = GPCMD_TEST_UNIT_READY;
1274
1275 /*
1276 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1277 * instead of supporting the LOAD_UNLOAD opcode.
1278 */
1279 cmd[7] = cdi->sanyo_slot % 3;
1280
1281 return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
1282 }
1283
1284 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1285 unsigned long *sectors_per_frame,
1286 struct request_sense *sense)
1287 {
1288 struct {
1289 __be32 lba;
1290 __be32 blocklen;
1291 } capbuf;
1292
1293 int stat;
1294 unsigned char cmd[BLK_MAX_CDB];
1295 unsigned len = sizeof(capbuf);
1296 u32 blocklen;
1297
1298 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1299
1300 memset(cmd, 0, BLK_MAX_CDB);
1301 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1302
1303 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1304 REQ_QUIET);
1305 if (stat)
1306 return stat;
1307
1308 /*
1309 * Sanity check the given block size
1310 */
1311 blocklen = be32_to_cpu(capbuf.blocklen);
1312 switch (blocklen) {
1313 case 512:
1314 case 1024:
1315 case 2048:
1316 case 4096:
1317 break;
1318 default:
1319 printk(KERN_ERR PFX "%s: weird block size %u\n",
1320 drive->name, blocklen);
1321 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
1322 drive->name);
1323 blocklen = 2048;
1324 break;
1325 }
1326
1327 *capacity = 1 + be32_to_cpu(capbuf.lba);
1328 *sectors_per_frame = blocklen >> SECTOR_BITS;
1329
1330 ide_debug_log(IDE_DBG_PROBE, "%s: cap: %lu, sectors_per_frame: %lu\n",
1331 __func__, *capacity, *sectors_per_frame);
1332
1333 return 0;
1334 }
1335
1336 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1337 int format, char *buf, int buflen,
1338 struct request_sense *sense)
1339 {
1340 unsigned char cmd[BLK_MAX_CDB];
1341
1342 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1343
1344 memset(cmd, 0, BLK_MAX_CDB);
1345
1346 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1347 cmd[6] = trackno;
1348 cmd[7] = (buflen >> 8);
1349 cmd[8] = (buflen & 0xff);
1350 cmd[9] = (format << 6);
1351
1352 if (msf_flag)
1353 cmd[1] = 2;
1354
1355 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1356 }
1357
1358 /* Try to read the entire TOC for the disk into our internal buffer. */
1359 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1360 {
1361 int stat, ntracks, i;
1362 struct cdrom_info *info = drive->driver_data;
1363 struct cdrom_device_info *cdi = &info->devinfo;
1364 struct atapi_toc *toc = info->toc;
1365 struct {
1366 struct atapi_toc_header hdr;
1367 struct atapi_toc_entry ent;
1368 } ms_tmp;
1369 long last_written;
1370 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1371
1372 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1373
1374 if (toc == NULL) {
1375 /* try to allocate space */
1376 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1377 if (toc == NULL) {
1378 printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
1379 drive->name);
1380 return -ENOMEM;
1381 }
1382 info->toc = toc;
1383 }
1384
1385 /*
1386 * Check to see if the existing data is still valid. If it is,
1387 * just return.
1388 */
1389 (void) cdrom_check_status(drive, sense);
1390
1391 if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1392 return 0;
1393
1394 /* try to get the total cdrom capacity and sector size */
1395 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1396 sense);
1397 if (stat)
1398 toc->capacity = 0x1fffff;
1399
1400 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1401 /* save a private copy of the TOC capacity for error handling */
1402 drive->probed_capacity = toc->capacity * sectors_per_frame;
1403
1404 blk_queue_hardsect_size(drive->queue,
1405 sectors_per_frame << SECTOR_BITS);
1406
1407 /* first read just the header, so we know how long the TOC is */
1408 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1409 sizeof(struct atapi_toc_header), sense);
1410 if (stat)
1411 return stat;
1412
1413 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1414 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1415 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1416 }
1417
1418 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1419 if (ntracks <= 0)
1420 return -EIO;
1421 if (ntracks > MAX_TRACKS)
1422 ntracks = MAX_TRACKS;
1423
1424 /* now read the whole schmeer */
1425 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1426 (char *)&toc->hdr,
1427 sizeof(struct atapi_toc_header) +
1428 (ntracks + 1) *
1429 sizeof(struct atapi_toc_entry), sense);
1430
1431 if (stat && toc->hdr.first_track > 1) {
1432 /*
1433 * Cds with CDI tracks only don't have any TOC entries, despite
1434 * of this the returned values are
1435 * first_track == last_track = number of CDI tracks + 1,
1436 * so that this case is indistinguishable from the same layout
1437 * plus an additional audio track. If we get an error for the
1438 * regular case, we assume a CDI without additional audio
1439 * tracks. In this case the readable TOC is empty (CDI tracks
1440 * are not included) and only holds the Leadout entry.
1441 *
1442 * Heiko Eißfeldt.
1443 */
1444 ntracks = 0;
1445 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1446 (char *)&toc->hdr,
1447 sizeof(struct atapi_toc_header) +
1448 (ntracks + 1) *
1449 sizeof(struct atapi_toc_entry),
1450 sense);
1451 if (stat)
1452 return stat;
1453
1454 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1455 toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1456 toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1457 } else {
1458 toc->hdr.first_track = CDROM_LEADOUT;
1459 toc->hdr.last_track = CDROM_LEADOUT;
1460 }
1461 }
1462
1463 if (stat)
1464 return stat;
1465
1466 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1467
1468 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1469 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1470 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1471 }
1472
1473 for (i = 0; i <= ntracks; i++) {
1474 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1475 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1476 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1477 msf_from_bcd(&toc->ent[i].addr.msf);
1478 }
1479 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1480 toc->ent[i].addr.msf.second,
1481 toc->ent[i].addr.msf.frame);
1482 }
1483
1484 if (toc->hdr.first_track != CDROM_LEADOUT) {
1485 /* read the multisession information */
1486 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1487 sizeof(ms_tmp), sense);
1488 if (stat)
1489 return stat;
1490
1491 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1492 } else {
1493 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1494 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1495 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1496 }
1497
1498 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1499 /* re-read multisession information using MSF format */
1500 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1501 sizeof(ms_tmp), sense);
1502 if (stat)
1503 return stat;
1504
1505 msf_from_bcd(&ms_tmp.ent.addr.msf);
1506 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1507 ms_tmp.ent.addr.msf.second,
1508 ms_tmp.ent.addr.msf.frame);
1509 }
1510
1511 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1512
1513 /* now try to get the total cdrom capacity */
1514 stat = cdrom_get_last_written(cdi, &last_written);
1515 if (!stat && (last_written > toc->capacity)) {
1516 toc->capacity = last_written;
1517 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1518 drive->probed_capacity = toc->capacity * sectors_per_frame;
1519 }
1520
1521 /* Remember that we've read this stuff. */
1522 drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1523
1524 return 0;
1525 }
1526
1527 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1528 {
1529 struct cdrom_info *info = drive->driver_data;
1530 struct cdrom_device_info *cdi = &info->devinfo;
1531 struct packet_command cgc;
1532 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1533
1534 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1535
1536 if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1537 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1538
1539 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1540 do {
1541 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1542 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1543 if (!stat)
1544 break;
1545 } while (--attempts);
1546 return stat;
1547 }
1548
1549 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1550 {
1551 struct cdrom_info *cd = drive->driver_data;
1552 u16 curspeed, maxspeed;
1553
1554 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1555
1556 if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1557 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1558 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1559 } else {
1560 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1561 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1562 }
1563
1564 ide_debug_log(IDE_DBG_PROBE, "%s: curspeed: %u, maxspeed: %u\n",
1565 __func__, curspeed, maxspeed);
1566
1567 cd->current_speed = (curspeed + (176/2)) / 176;
1568 cd->max_speed = (maxspeed + (176/2)) / 176;
1569 }
1570
1571 #define IDE_CD_CAPABILITIES \
1572 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1573 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1574 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1575 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1576 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1577
1578 static struct cdrom_device_ops ide_cdrom_dops = {
1579 .open = ide_cdrom_open_real,
1580 .release = ide_cdrom_release_real,
1581 .drive_status = ide_cdrom_drive_status,
1582 .media_changed = ide_cdrom_check_media_change_real,
1583 .tray_move = ide_cdrom_tray_move,
1584 .lock_door = ide_cdrom_lock_door,
1585 .select_speed = ide_cdrom_select_speed,
1586 .get_last_session = ide_cdrom_get_last_session,
1587 .get_mcn = ide_cdrom_get_mcn,
1588 .reset = ide_cdrom_reset,
1589 .audio_ioctl = ide_cdrom_audio_ioctl,
1590 .capability = IDE_CD_CAPABILITIES,
1591 .generic_packet = ide_cdrom_packet,
1592 };
1593
1594 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1595 {
1596 struct cdrom_info *info = drive->driver_data;
1597 struct cdrom_device_info *devinfo = &info->devinfo;
1598
1599 ide_debug_log(IDE_DBG_PROBE, "Call %s, nslots: %d\n", __func__, nslots);
1600
1601 devinfo->ops = &ide_cdrom_dops;
1602 devinfo->speed = info->current_speed;
1603 devinfo->capacity = nslots;
1604 devinfo->handle = drive;
1605 strcpy(devinfo->name, drive->name);
1606
1607 if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1608 devinfo->mask |= CDC_SELECT_SPEED;
1609
1610 devinfo->disk = info->disk;
1611 return register_cdrom(devinfo);
1612 }
1613
1614 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1615 {
1616 struct cdrom_info *cd = drive->driver_data;
1617 struct cdrom_device_info *cdi = &cd->devinfo;
1618 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1619 mechtype_t mechtype;
1620 int nslots = 1;
1621
1622 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->media: 0x%x, "
1623 "drive->atapi_flags: 0x%lx\n", __func__, drive->media,
1624 drive->atapi_flags);
1625
1626 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1627 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1628 CDC_MO_DRIVE | CDC_RAM);
1629
1630 if (drive->media == ide_optical) {
1631 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1632 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1633 drive->name);
1634 return nslots;
1635 }
1636
1637 if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1638 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1639 cdi->mask &= ~CDC_PLAY_AUDIO;
1640 return nslots;
1641 }
1642
1643 /*
1644 * We have to cheat a little here. the packet will eventually be queued
1645 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1646 * Since this device hasn't been registered with the Uniform layer yet,
1647 * it can't do this. Same goes for cdi->ops.
1648 */
1649 cdi->handle = drive;
1650 cdi->ops = &ide_cdrom_dops;
1651
1652 if (ide_cdrom_get_capabilities(drive, buf))
1653 return 0;
1654
1655 if ((buf[8 + 6] & 0x01) == 0)
1656 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1657 if (buf[8 + 6] & 0x08)
1658 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1659 if (buf[8 + 3] & 0x01)
1660 cdi->mask &= ~CDC_CD_R;
1661 if (buf[8 + 3] & 0x02)
1662 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1663 if (buf[8 + 2] & 0x38)
1664 cdi->mask &= ~CDC_DVD;
1665 if (buf[8 + 3] & 0x20)
1666 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1667 if (buf[8 + 3] & 0x10)
1668 cdi->mask &= ~CDC_DVD_R;
1669 if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1670 cdi->mask &= ~CDC_PLAY_AUDIO;
1671
1672 mechtype = buf[8 + 6] >> 5;
1673 if (mechtype == mechtype_caddy ||
1674 mechtype == mechtype_popup ||
1675 (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1676 cdi->mask |= CDC_CLOSE_TRAY;
1677
1678 if (cdi->sanyo_slot > 0) {
1679 cdi->mask &= ~CDC_SELECT_DISC;
1680 nslots = 3;
1681 } else if (mechtype == mechtype_individual_changer ||
1682 mechtype == mechtype_cartridge_changer) {
1683 nslots = cdrom_number_of_slots(cdi);
1684 if (nslots > 1)
1685 cdi->mask &= ~CDC_SELECT_DISC;
1686 }
1687
1688 ide_cdrom_update_speed(drive, buf);
1689
1690 printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1691
1692 /* don't print speed if the drive reported 0 */
1693 if (cd->max_speed)
1694 printk(KERN_CONT " %dX", cd->max_speed);
1695
1696 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1697
1698 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1699 printk(KERN_CONT " DVD%s%s",
1700 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1701 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1702
1703 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1704 printk(KERN_CONT " CD%s%s",
1705 (cdi->mask & CDC_CD_R) ? "" : "-R",
1706 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1707
1708 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1709 printk(KERN_CONT " changer w/%d slots", nslots);
1710 else
1711 printk(KERN_CONT " drive");
1712
1713 printk(KERN_CONT ", %dkB Cache\n",
1714 be16_to_cpup((__be16 *)&buf[8 + 12]));
1715
1716 return nslots;
1717 }
1718
1719 /* standard prep_rq_fn that builds 10 byte cmds */
1720 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1721 {
1722 int hard_sect = queue_hardsect_size(q);
1723 long block = (long)rq->hard_sector / (hard_sect >> 9);
1724 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1725
1726 memset(rq->cmd, 0, BLK_MAX_CDB);
1727
1728 if (rq_data_dir(rq) == READ)
1729 rq->cmd[0] = GPCMD_READ_10;
1730 else
1731 rq->cmd[0] = GPCMD_WRITE_10;
1732
1733 /*
1734 * fill in lba
1735 */
1736 rq->cmd[2] = (block >> 24) & 0xff;
1737 rq->cmd[3] = (block >> 16) & 0xff;
1738 rq->cmd[4] = (block >> 8) & 0xff;
1739 rq->cmd[5] = block & 0xff;
1740
1741 /*
1742 * and transfer length
1743 */
1744 rq->cmd[7] = (blocks >> 8) & 0xff;
1745 rq->cmd[8] = blocks & 0xff;
1746 rq->cmd_len = 10;
1747 return BLKPREP_OK;
1748 }
1749
1750 /*
1751 * Most of the SCSI commands are supported directly by ATAPI devices.
1752 * This transform handles the few exceptions.
1753 */
1754 static int ide_cdrom_prep_pc(struct request *rq)
1755 {
1756 u8 *c = rq->cmd;
1757
1758 /* transform 6-byte read/write commands to the 10-byte version */
1759 if (c[0] == READ_6 || c[0] == WRITE_6) {
1760 c[8] = c[4];
1761 c[5] = c[3];
1762 c[4] = c[2];
1763 c[3] = c[1] & 0x1f;
1764 c[2] = 0;
1765 c[1] &= 0xe0;
1766 c[0] += (READ_10 - READ_6);
1767 rq->cmd_len = 10;
1768 return BLKPREP_OK;
1769 }
1770
1771 /*
1772 * it's silly to pretend we understand 6-byte sense commands, just
1773 * reject with ILLEGAL_REQUEST and the caller should take the
1774 * appropriate action
1775 */
1776 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1777 rq->errors = ILLEGAL_REQUEST;
1778 return BLKPREP_KILL;
1779 }
1780
1781 return BLKPREP_OK;
1782 }
1783
1784 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1785 {
1786 if (blk_fs_request(rq))
1787 return ide_cdrom_prep_fs(q, rq);
1788 else if (blk_pc_request(rq))
1789 return ide_cdrom_prep_pc(rq);
1790
1791 return 0;
1792 }
1793
1794 struct cd_list_entry {
1795 const char *id_model;
1796 const char *id_firmware;
1797 unsigned int cd_flags;
1798 };
1799
1800 #ifdef CONFIG_IDE_PROC_FS
1801 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1802 {
1803 unsigned long capacity, sectors_per_frame;
1804
1805 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1806 return 0;
1807
1808 return capacity * sectors_per_frame;
1809 }
1810
1811 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1812 int count, int *eof, void *data)
1813 {
1814 ide_drive_t *drive = data;
1815 int len;
1816
1817 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1818 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1819 }
1820
1821 static ide_proc_entry_t idecd_proc[] = {
1822 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1823 { NULL, 0, NULL, NULL }
1824 };
1825
1826 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1827 {
1828 return idecd_proc;
1829 }
1830
1831 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1832 {
1833 return NULL;
1834 }
1835 #endif
1836
1837 static const struct cd_list_entry ide_cd_quirks_list[] = {
1838 /* Limit transfer size per interrupt. */
1839 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1840 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
1841 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1842 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1843 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1844 { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1845 IDE_AFLAG_PRE_ATAPI12, },
1846 /* Vertos 300, some versions of this drive like to talk BCD. */
1847 { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1848 /* Vertos 600 ESD. */
1849 { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1850 /*
1851 * Sanyo 3 CD changer uses a non-standard command for CD changing
1852 * (by default standard ATAPI support for CD changers is used).
1853 */
1854 { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1855 { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1856 { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1857 /* Stingray 8X CD-ROM. */
1858 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1859 /*
1860 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1861 * mode sense page capabilities size, but older drives break.
1862 */
1863 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1864 { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1865 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1866 { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1867 /*
1868 * Some drives used by Apple don't advertise audio play
1869 * but they do support reading TOC & audio datas.
1870 */
1871 { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1872 { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1873 { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1874 { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1875 { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1876 { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1877 { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1878 { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1879 { NULL, NULL, 0 }
1880 };
1881
1882 static unsigned int ide_cd_flags(u16 *id)
1883 {
1884 const struct cd_list_entry *cle = ide_cd_quirks_list;
1885
1886 while (cle->id_model) {
1887 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1888 (cle->id_firmware == NULL ||
1889 strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1890 return cle->cd_flags;
1891 cle++;
1892 }
1893
1894 return 0;
1895 }
1896
1897 static int ide_cdrom_setup(ide_drive_t *drive)
1898 {
1899 struct cdrom_info *cd = drive->driver_data;
1900 struct cdrom_device_info *cdi = &cd->devinfo;
1901 u16 *id = drive->id;
1902 char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1903 int nslots;
1904
1905 ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__);
1906
1907 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1908 blk_queue_dma_alignment(drive->queue, 31);
1909 blk_queue_update_dma_pad(drive->queue, 15);
1910 drive->queue->unplug_delay = (1 * HZ) / 1000;
1911 if (!drive->queue->unplug_delay)
1912 drive->queue->unplug_delay = 1;
1913
1914 drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1915 drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1916
1917 if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1918 fw_rev[4] == '1' && fw_rev[6] <= '2')
1919 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1920 IDE_AFLAG_TOCADDR_AS_BCD);
1921 else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1922 fw_rev[4] == '1' && fw_rev[6] <= '2')
1923 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1924 else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1925 /* 3 => use CD in slot 0 */
1926 cdi->sanyo_slot = 3;
1927
1928 nslots = ide_cdrom_probe_capabilities(drive);
1929
1930 /* set correct block size */
1931 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1932
1933 if (ide_cdrom_register(drive, nslots)) {
1934 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1935 " cdrom driver.\n", drive->name, __func__);
1936 cd->devinfo.handle = NULL;
1937 return 1;
1938 }
1939
1940 ide_proc_register_driver(drive, cd->driver);
1941 return 0;
1942 }
1943
1944 static void ide_cd_remove(ide_drive_t *drive)
1945 {
1946 struct cdrom_info *info = drive->driver_data;
1947
1948 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1949
1950 ide_proc_unregister_driver(drive, info->driver);
1951
1952 del_gendisk(info->disk);
1953
1954 ide_cd_put(info);
1955 }
1956
1957 static void ide_cd_release(struct kref *kref)
1958 {
1959 struct cdrom_info *info = to_ide_drv(kref, cdrom_info);
1960 struct cdrom_device_info *devinfo = &info->devinfo;
1961 ide_drive_t *drive = info->drive;
1962 struct gendisk *g = info->disk;
1963
1964 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
1965
1966 kfree(info->toc);
1967 if (devinfo->handle == drive)
1968 unregister_cdrom(devinfo);
1969 drive->driver_data = NULL;
1970 blk_queue_prep_rq(drive->queue, NULL);
1971 g->private_data = NULL;
1972 put_disk(g);
1973 kfree(info);
1974 }
1975
1976 static int ide_cd_probe(ide_drive_t *);
1977
1978 static ide_driver_t ide_cdrom_driver = {
1979 .gen_driver = {
1980 .owner = THIS_MODULE,
1981 .name = "ide-cdrom",
1982 .bus = &ide_bus_type,
1983 },
1984 .probe = ide_cd_probe,
1985 .remove = ide_cd_remove,
1986 .version = IDECD_VERSION,
1987 .do_request = ide_cd_do_request,
1988 .end_request = ide_end_request,
1989 .error = __ide_error,
1990 #ifdef CONFIG_IDE_PROC_FS
1991 .proc_entries = ide_cd_proc_entries,
1992 .proc_devsets = ide_cd_proc_devsets,
1993 #endif
1994 };
1995
1996 static int idecd_open(struct block_device *bdev, fmode_t mode)
1997 {
1998 struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1999 int rc = -ENOMEM;
2000
2001 if (!info)
2002 return -ENXIO;
2003
2004 rc = cdrom_open(&info->devinfo, bdev, mode);
2005
2006 if (rc < 0)
2007 ide_cd_put(info);
2008
2009 return rc;
2010 }
2011
2012 static int idecd_release(struct gendisk *disk, fmode_t mode)
2013 {
2014 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2015
2016 cdrom_release(&info->devinfo, mode);
2017
2018 ide_cd_put(info);
2019
2020 return 0;
2021 }
2022
2023 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2024 {
2025 struct packet_command cgc;
2026 char buffer[16];
2027 int stat;
2028 char spindown;
2029
2030 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2031 return -EFAULT;
2032
2033 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2034
2035 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2036 if (stat)
2037 return stat;
2038
2039 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2040 return cdrom_mode_select(cdi, &cgc);
2041 }
2042
2043 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2044 {
2045 struct packet_command cgc;
2046 char buffer[16];
2047 int stat;
2048 char spindown;
2049
2050 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2051
2052 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2053 if (stat)
2054 return stat;
2055
2056 spindown = buffer[11] & 0x0f;
2057 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2058 return -EFAULT;
2059 return 0;
2060 }
2061
2062 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
2063 unsigned int cmd, unsigned long arg)
2064 {
2065 struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
2066 int err;
2067
2068 switch (cmd) {
2069 case CDROMSETSPINDOWN:
2070 return idecd_set_spindown(&info->devinfo, arg);
2071 case CDROMGETSPINDOWN:
2072 return idecd_get_spindown(&info->devinfo, arg);
2073 default:
2074 break;
2075 }
2076
2077 err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
2078 if (err == -EINVAL)
2079 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
2080
2081 return err;
2082 }
2083
2084 static int idecd_media_changed(struct gendisk *disk)
2085 {
2086 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2087 return cdrom_media_changed(&info->devinfo);
2088 }
2089
2090 static int idecd_revalidate_disk(struct gendisk *disk)
2091 {
2092 struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
2093 struct request_sense sense;
2094
2095 ide_cd_read_toc(info->drive, &sense);
2096
2097 return 0;
2098 }
2099
2100 static struct block_device_operations idecd_ops = {
2101 .owner = THIS_MODULE,
2102 .open = idecd_open,
2103 .release = idecd_release,
2104 .locked_ioctl = idecd_ioctl,
2105 .media_changed = idecd_media_changed,
2106 .revalidate_disk = idecd_revalidate_disk
2107 };
2108
2109 /* module options */
2110 static char *ignore;
2111 module_param(ignore, charp, 0400);
2112
2113 static unsigned long debug_mask;
2114 module_param(debug_mask, ulong, 0644);
2115
2116 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2117
2118 static int ide_cd_probe(ide_drive_t *drive)
2119 {
2120 struct cdrom_info *info;
2121 struct gendisk *g;
2122 struct request_sense sense;
2123
2124 ide_debug_log(IDE_DBG_PROBE, "Call %s, drive->driver_req: %s, "
2125 "drive->media: 0x%x\n", __func__, drive->driver_req,
2126 drive->media);
2127
2128 if (!strstr("ide-cdrom", drive->driver_req))
2129 goto failed;
2130
2131 if (drive->media != ide_cdrom && drive->media != ide_optical)
2132 goto failed;
2133
2134 /* skip drives that we were told to ignore */
2135 if (ignore != NULL) {
2136 if (strstr(ignore, drive->name)) {
2137 printk(KERN_INFO PFX "ignoring drive %s\n",
2138 drive->name);
2139 goto failed;
2140 }
2141 }
2142
2143 drive->debug_mask = debug_mask;
2144
2145 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2146 if (info == NULL) {
2147 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
2148 drive->name);
2149 goto failed;
2150 }
2151
2152 g = alloc_disk(1 << PARTN_BITS);
2153 if (!g)
2154 goto out_free_cd;
2155
2156 ide_init_disk(g, drive);
2157
2158 kref_init(&info->kref);
2159
2160 info->drive = drive;
2161 info->driver = &ide_cdrom_driver;
2162 info->disk = g;
2163
2164 g->private_data = &info->driver;
2165
2166 drive->driver_data = info;
2167
2168 g->minors = 1;
2169 g->driverfs_dev = &drive->gendev;
2170 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2171 if (ide_cdrom_setup(drive)) {
2172 ide_cd_release(&info->kref);
2173 goto failed;
2174 }
2175
2176 ide_cd_read_toc(drive, &sense);
2177 g->fops = &idecd_ops;
2178 g->flags |= GENHD_FL_REMOVABLE;
2179 add_disk(g);
2180 return 0;
2181
2182 out_free_cd:
2183 kfree(info);
2184 failed:
2185 return -ENODEV;
2186 }
2187
2188 static void __exit ide_cdrom_exit(void)
2189 {
2190 driver_unregister(&ide_cdrom_driver.gen_driver);
2191 }
2192
2193 static int __init ide_cdrom_init(void)
2194 {
2195 printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
2196 return driver_register(&ide_cdrom_driver.gen_driver);
2197 }
2198
2199 MODULE_ALIAS("ide:*m-cdrom*");
2200 MODULE_ALIAS("ide-cd");
2201 module_init(ide_cdrom_init);
2202 module_exit(ide_cdrom_exit);
2203 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree