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PRCM: 34XX: Fix wrong shift value used in dpll4_m4x2_ck enable bit
[linux-ginger.git] / drivers / ide / ide-cd.c
blob68e7f19dc03662b405363ca23bf0081db73baa4a
1 /*
2 * ATAPI CD-ROM driver.
3 *
4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
8 *
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
11 *
12 * See Documentation/cdrom/ide-cd for usage information.
13 *
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
18 * anonymous ftp from:
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
21 *
22 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
24 */
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
56
57 #define ide_cd_g(disk) \
58 container_of((disk)->private_data, struct cdrom_info, driver)
59
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
61 {
62 struct cdrom_info *cd = NULL;
63
64 mutex_lock(&idecd_ref_mutex);
65 cd = ide_cd_g(disk);
66 if (cd)
67 kref_get(&cd->kref);
68 mutex_unlock(&idecd_ref_mutex);
69 return cd;
70 }
71
72 static void ide_cd_release(struct kref *);
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76 mutex_lock(&idecd_ref_mutex);
77 kref_put(&cd->kref, ide_cd_release);
78 mutex_unlock(&idecd_ref_mutex);
79 }
80
81 /*
82 * Generic packet command support and error handling routines.
83 */
84
85 /* Mark that we've seen a media change and invalidate our internal buffers. */
86 static void cdrom_saw_media_change(ide_drive_t *drive)
87 {
88 struct cdrom_info *cd = drive->driver_data;
89
90 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
91 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
92 }
93
94 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
95 struct request_sense *sense)
96 {
97 int log = 0;
98
99 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
100 return 0;
101
102 switch (sense->sense_key) {
103 case NO_SENSE:
104 case RECOVERED_ERROR:
105 break;
106 case NOT_READY:
107 /*
108 * don't care about tray state messages for e.g. capacity
109 * commands or in-progress or becoming ready
110 */
111 if (sense->asc == 0x3a || sense->asc == 0x04)
112 break;
113 log = 1;
114 break;
115 case ILLEGAL_REQUEST:
116 /*
117 * don't log START_STOP unit with LoEj set, since we cannot
118 * reliably check if drive can auto-close
119 */
120 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
121 break;
122 log = 1;
123 break;
124 case UNIT_ATTENTION:
125 /*
126 * Make good and sure we've seen this potential media change.
127 * Some drives (i.e. Creative) fail to present the correct sense
128 * key in the error register.
129 */
130 cdrom_saw_media_change(drive);
131 break;
132 default:
133 log = 1;
134 break;
135 }
136 return log;
137 }
138
139 static void cdrom_analyze_sense_data(ide_drive_t *drive,
140 struct request *failed_command,
141 struct request_sense *sense)
142 {
143 unsigned long sector;
144 unsigned long bio_sectors;
145 struct cdrom_info *info = drive->driver_data;
146
147 if (!cdrom_log_sense(drive, failed_command, sense))
148 return;
149
150 /*
151 * If a read toc is executed for a CD-R or CD-RW medium where the first
152 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
153 * confusing error)
154 */
155 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
156 if (sense->sense_key == 0x05 && sense->asc == 0x24)
157 return;
158
159 /* current error */
160 if (sense->error_code == 0x70) {
161 switch (sense->sense_key) {
162 case MEDIUM_ERROR:
163 case VOLUME_OVERFLOW:
164 case ILLEGAL_REQUEST:
165 if (!sense->valid)
166 break;
167 if (failed_command == NULL ||
168 !blk_fs_request(failed_command))
169 break;
170 sector = (sense->information[0] << 24) |
171 (sense->information[1] << 16) |
172 (sense->information[2] << 8) |
173 (sense->information[3]);
174
175 if (drive->queue->hardsect_size == 2048)
176 /* device sector size is 2K */
177 sector <<= 2;
178
179 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
180 sector &= ~(bio_sectors - 1);
181
182 if (sector < get_capacity(info->disk) &&
183 drive->probed_capacity - sector < 4 * 75)
184 set_capacity(info->disk, sector);
185 }
186 }
187
188 ide_cd_log_error(drive->name, failed_command, sense);
189 }
190
191 /* Initialize a ide-cd packet command request */
192 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
193 {
194 struct cdrom_info *cd = drive->driver_data;
195
196 ide_init_drive_cmd(rq);
197 rq->cmd_type = REQ_TYPE_ATA_PC;
198 rq->rq_disk = cd->disk;
199 }
200
201 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
202 struct request *failed_command)
203 {
204 struct cdrom_info *info = drive->driver_data;
205 struct request *rq = &info->request_sense_request;
206
207 if (sense == NULL)
208 sense = &info->sense_data;
209
210 /* stuff the sense request in front of our current request */
211 ide_cd_init_rq(drive, rq);
212
213 rq->data = sense;
214 rq->cmd[0] = GPCMD_REQUEST_SENSE;
215 rq->cmd[4] = 18;
216 rq->data_len = 18;
217
218 rq->cmd_type = REQ_TYPE_SENSE;
219
220 /* NOTE! Save the failed command in "rq->buffer" */
221 rq->buffer = (void *) failed_command;
222
223 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
224 }
225
226 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
227 {
228 struct request *rq = HWGROUP(drive)->rq;
229 int nsectors = rq->hard_cur_sectors;
230
231 if (blk_sense_request(rq) && uptodate) {
232 /*
233 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
234 * failed request
235 */
236 struct request *failed = (struct request *) rq->buffer;
237 struct cdrom_info *info = drive->driver_data;
238 void *sense = &info->sense_data;
239 unsigned long flags;
240
241 if (failed) {
242 if (failed->sense) {
243 sense = failed->sense;
244 failed->sense_len = rq->sense_len;
245 }
246 cdrom_analyze_sense_data(drive, failed, sense);
247 /*
248 * now end the failed request
249 */
250 if (blk_fs_request(failed)) {
251 if (ide_end_dequeued_request(drive, failed, 0,
252 failed->hard_nr_sectors))
253 BUG();
254 } else {
255 spin_lock_irqsave(&ide_lock, flags);
256 if (__blk_end_request(failed, -EIO,
257 failed->data_len))
258 BUG();
259 spin_unlock_irqrestore(&ide_lock, flags);
260 }
261 } else
262 cdrom_analyze_sense_data(drive, NULL, sense);
263 }
264
265 if (!rq->current_nr_sectors && blk_fs_request(rq))
266 uptodate = 1;
267 /* make sure it's fully ended */
268 if (blk_pc_request(rq))
269 nsectors = (rq->data_len + 511) >> 9;
270 if (!nsectors)
271 nsectors = 1;
272
273 ide_end_request(drive, uptodate, nsectors);
274 }
275
276 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
277 {
278 if (st & 0x80)
279 return;
280 ide_dump_status(drive, msg, st);
281 }
282
283 /*
284 * Returns:
285 * 0: if the request should be continued.
286 * 1: if the request was ended.
287 */
288 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
289 {
290 struct request *rq = HWGROUP(drive)->rq;
291 int stat, err, sense_key;
292
293 /* check for errors */
294 stat = ide_read_status(drive);
295
296 if (stat_ret)
297 *stat_ret = stat;
298
299 if (OK_STAT(stat, good_stat, BAD_R_STAT))
300 return 0;
301
302 /* get the IDE error register */
303 err = ide_read_error(drive);
304 sense_key = err >> 4;
305
306 if (rq == NULL) {
307 printk(KERN_ERR "%s: missing rq in %s\n",
308 drive->name, __func__);
309 return 1;
310 }
311
312 if (blk_sense_request(rq)) {
313 /*
314 * We got an error trying to get sense info from the drive
315 * (probably while trying to recover from a former error).
316 * Just give up.
317 */
318 rq->cmd_flags |= REQ_FAILED;
319 cdrom_end_request(drive, 0);
320 ide_error(drive, "request sense failure", stat);
321 return 1;
322
323 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
324 /* All other functions, except for READ. */
325
326 /*
327 * if we have an error, pass back CHECK_CONDITION as the
328 * scsi status byte
329 */
330 if (blk_pc_request(rq) && !rq->errors)
331 rq->errors = SAM_STAT_CHECK_CONDITION;
332
333 /* check for tray open */
334 if (sense_key == NOT_READY) {
335 cdrom_saw_media_change(drive);
336 } else if (sense_key == UNIT_ATTENTION) {
337 /* check for media change */
338 cdrom_saw_media_change(drive);
339 return 0;
340 } else if (sense_key == ILLEGAL_REQUEST &&
341 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
342 /*
343 * Don't print error message for this condition--
344 * SFF8090i indicates that 5/24/00 is the correct
345 * response to a request to close the tray if the
346 * drive doesn't have that capability.
347 * cdrom_log_sense() knows this!
348 */
349 } else if (!(rq->cmd_flags & REQ_QUIET)) {
350 /* otherwise, print an error */
351 ide_dump_status(drive, "packet command error", stat);
352 }
353
354 rq->cmd_flags |= REQ_FAILED;
355
356 /*
357 * instead of playing games with moving completions around,
358 * remove failed request completely and end it when the
359 * request sense has completed
360 */
361 goto end_request;
362
363 } else if (blk_fs_request(rq)) {
364 int do_end_request = 0;
365
366 /* handle errors from READ and WRITE requests */
367
368 if (blk_noretry_request(rq))
369 do_end_request = 1;
370
371 if (sense_key == NOT_READY) {
372 /* tray open */
373 if (rq_data_dir(rq) == READ) {
374 cdrom_saw_media_change(drive);
375
376 /* fail the request */
377 printk(KERN_ERR "%s: tray open\n", drive->name);
378 do_end_request = 1;
379 } else {
380 struct cdrom_info *info = drive->driver_data;
381
382 /*
383 * Allow the drive 5 seconds to recover, some
384 * devices will return this error while flushing
385 * data from cache.
386 */
387 if (!rq->errors)
388 info->write_timeout = jiffies +
389 ATAPI_WAIT_WRITE_BUSY;
390 rq->errors = 1;
391 if (time_after(jiffies, info->write_timeout))
392 do_end_request = 1;
393 else {
394 unsigned long flags;
395
396 /*
397 * take a breather relying on the unplug
398 * timer to kick us again
399 */
400 spin_lock_irqsave(&ide_lock, flags);
401 blk_plug_device(drive->queue);
402 spin_unlock_irqrestore(&ide_lock,
403 flags);
404 return 1;
405 }
406 }
407 } else if (sense_key == UNIT_ATTENTION) {
408 /* media change */
409 cdrom_saw_media_change(drive);
410
411 /*
412 * Arrange to retry the request but be sure to give up
413 * if we've retried too many times.
414 */
415 if (++rq->errors > ERROR_MAX)
416 do_end_request = 1;
417 } else if (sense_key == ILLEGAL_REQUEST ||
418 sense_key == DATA_PROTECT) {
419 /*
420 * No point in retrying after an illegal request or data
421 * protect error.
422 */
423 ide_dump_status_no_sense(drive, "command error", stat);
424 do_end_request = 1;
425 } else if (sense_key == MEDIUM_ERROR) {
426 /*
427 * No point in re-trying a zillion times on a bad
428 * sector. If we got here the error is not correctable.
429 */
430 ide_dump_status_no_sense(drive,
431 "media error (bad sector)",
432 stat);
433 do_end_request = 1;
434 } else if (sense_key == BLANK_CHECK) {
435 /* disk appears blank ?? */
436 ide_dump_status_no_sense(drive, "media error (blank)",
437 stat);
438 do_end_request = 1;
439 } else if ((err & ~ABRT_ERR) != 0) {
440 /* go to the default handler for other errors */
441 ide_error(drive, "cdrom_decode_status", stat);
442 return 1;
443 } else if ((++rq->errors > ERROR_MAX)) {
444 /* we've racked up too many retries, abort */
445 do_end_request = 1;
446 }
447
448 /*
449 * End a request through request sense analysis when we have
450 * sense data. We need this in order to perform end of media
451 * processing.
452 */
453 if (do_end_request)
454 goto end_request;
455
456 /*
457 * If we got a CHECK_CONDITION status, queue
458 * a request sense command.
459 */
460 if (stat & ERR_STAT)
461 cdrom_queue_request_sense(drive, NULL, NULL);
462 } else {
463 blk_dump_rq_flags(rq, "ide-cd: bad rq");
464 cdrom_end_request(drive, 0);
465 }
466
467 /* retry, or handle the next request */
468 return 1;
469
470 end_request:
471 if (stat & ERR_STAT) {
472 unsigned long flags;
473
474 spin_lock_irqsave(&ide_lock, flags);
475 blkdev_dequeue_request(rq);
476 HWGROUP(drive)->rq = NULL;
477 spin_unlock_irqrestore(&ide_lock, flags);
478
479 cdrom_queue_request_sense(drive, rq->sense, rq);
480 } else
481 cdrom_end_request(drive, 0);
482
483 return 1;
484 }
485
486 static int cdrom_timer_expiry(ide_drive_t *drive)
487 {
488 struct request *rq = HWGROUP(drive)->rq;
489 unsigned long wait = 0;
490
491 /*
492 * Some commands are *slow* and normally take a long time to complete.
493 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
494 * commands/drives support that. Let ide_timer_expiry keep polling us
495 * for these.
496 */
497 switch (rq->cmd[0]) {
498 case GPCMD_BLANK:
499 case GPCMD_FORMAT_UNIT:
500 case GPCMD_RESERVE_RZONE_TRACK:
501 case GPCMD_CLOSE_TRACK:
502 case GPCMD_FLUSH_CACHE:
503 wait = ATAPI_WAIT_PC;
504 break;
505 default:
506 if (!(rq->cmd_flags & REQ_QUIET))
507 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
508 rq->cmd[0]);
509 wait = 0;
510 break;
511 }
512 return wait;
513 }
514
515 /*
516 * Set up the device registers for transferring a packet command on DEV,
517 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
518 * which actually transfers the command to the drive. If this is a
519 * drq_interrupt device, this routine will arrange for HANDLER to be
520 * called when the interrupt from the drive arrives. Otherwise, HANDLER
521 * will be called immediately after the drive is prepared for the transfer.
522 */
523 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
524 int xferlen,
525 ide_handler_t *handler)
526 {
527 ide_startstop_t startstop;
528 struct cdrom_info *info = drive->driver_data;
529 ide_hwif_t *hwif = drive->hwif;
530
531 /* wait for the controller to be idle */
532 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
533 return startstop;
534
535 /* FIXME: for Virtual DMA we must check harder */
536 if (info->dma)
537 info->dma = !hwif->dma_ops->dma_setup(drive);
538
539 /* set up the controller registers */
540 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
541 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
542
543 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
544 /* waiting for CDB interrupt, not DMA yet. */
545 if (info->dma)
546 drive->waiting_for_dma = 0;
547
548 /* packet command */
549 ide_execute_command(drive, WIN_PACKETCMD, handler,
550 ATAPI_WAIT_PC, cdrom_timer_expiry);
551 return ide_started;
552 } else {
553 ide_execute_pkt_cmd(drive);
554
555 return (*handler) (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 struct request *rq,
568 ide_handler_t *handler)
569 {
570 ide_hwif_t *hwif = drive->hwif;
571 int cmd_len;
572 struct cdrom_info *info = drive->driver_data;
573 ide_startstop_t startstop;
574
575 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
576 /*
577 * Here we should have been called after receiving an interrupt
578 * from the device. DRQ should how be set.
579 */
580
581 /* check for errors */
582 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
583 return ide_stopped;
584
585 /* ok, next interrupt will be DMA interrupt */
586 if (info->dma)
587 drive->waiting_for_dma = 1;
588 } else {
589 /* otherwise, we must wait for DRQ to get set */
590 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
591 BUSY_STAT, WAIT_READY))
592 return startstop;
593 }
594
595 /* arm the interrupt handler */
596 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
597
598 /* ATAPI commands get padded out to 12 bytes minimum */
599 cmd_len = COMMAND_SIZE(rq->cmd[0]);
600 if (cmd_len < ATAPI_MIN_CDB_BYTES)
601 cmd_len = ATAPI_MIN_CDB_BYTES;
602
603 /* send the command to the device */
604 hwif->output_data(drive, NULL, rq->cmd, cmd_len);
605
606 /* start the DMA if need be */
607 if (info->dma)
608 hwif->dma_ops->dma_start(drive);
609
610 return ide_started;
611 }
612
613 /*
614 * Block read functions.
615 */
616 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
617 {
618 while (len > 0) {
619 int dum = 0;
620 xf(drive, NULL, &dum, sizeof(dum));
621 len -= sizeof(dum);
622 }
623 }
624
625 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
626 {
627 while (nsects > 0) {
628 static char dum[SECTOR_SIZE];
629
630 drive->hwif->input_data(drive, NULL, dum, sizeof(dum));
631 nsects--;
632 }
633 }
634
635 /*
636 * Check the contents of the interrupt reason register from the cdrom
637 * and attempt to recover if there are problems. Returns 0 if everything's
638 * ok; nonzero if the request has been terminated.
639 */
640 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
641 int len, int ireason, int rw)
642 {
643 /*
644 * ireason == 0: the drive wants to receive data from us
645 * ireason == 2: the drive is expecting to transfer data to us
646 */
647 if (ireason == (!rw << 1))
648 return 0;
649 else if (ireason == (rw << 1)) {
650 ide_hwif_t *hwif = drive->hwif;
651 xfer_func_t *xf;
652
653 /* whoops... */
654 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
655 drive->name, __func__);
656
657 xf = rw ? hwif->output_data : hwif->input_data;
658 ide_cd_pad_transfer(drive, xf, len);
659 } else if (rw == 0 && ireason == 1) {
660 /*
661 * Some drives (ASUS) seem to tell us that status info is
662 * available. Just get it and ignore.
663 */
664 (void)ide_read_status(drive);
665 return 0;
666 } else {
667 /* drive wants a command packet, or invalid ireason... */
668 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
669 drive->name, __func__, ireason);
670 }
671
672 if (rq->cmd_type == REQ_TYPE_ATA_PC)
673 rq->cmd_flags |= REQ_FAILED;
674
675 cdrom_end_request(drive, 0);
676 return -1;
677 }
678
679 /*
680 * Assume that the drive will always provide data in multiples of at least
681 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
682 */
683 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
684 {
685 struct cdrom_info *cd = drive->driver_data;
686
687 if ((len % SECTOR_SIZE) == 0)
688 return 0;
689
690 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
691 drive->name, __func__, len);
692
693 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
694 printk(KERN_ERR " This drive is not supported by "
695 "this version of the driver\n");
696 else {
697 printk(KERN_ERR " Trying to limit transfer sizes\n");
698 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
699 }
700
701 return 1;
702 }
703
704 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
705
706 /*
707 * Routine to send a read/write packet command to the drive. This is usually
708 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
709 * devices, it is called from an interrupt when the drive is ready to accept
710 * the command.
711 */
712 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
713 {
714 struct request *rq = HWGROUP(drive)->rq;
715
716 if (rq_data_dir(rq) == READ) {
717 unsigned short sectors_per_frame =
718 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
719 int nskip = rq->sector & (sectors_per_frame - 1);
720
721 /*
722 * If the requested sector doesn't start on a frame boundary,
723 * we must adjust the start of the transfer so that it does,
724 * and remember to skip the first few sectors.
725 *
726 * If the rq->current_nr_sectors field is larger than the size
727 * of the buffer, it will mean that we're to skip a number of
728 * sectors equal to the amount by which rq->current_nr_sectors
729 * is larger than the buffer size.
730 */
731 if (nskip > 0) {
732 /* sanity check... */
733 if (rq->current_nr_sectors !=
734 bio_cur_sectors(rq->bio)) {
735 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
736 drive->name, __func__,
737 rq->current_nr_sectors);
738 cdrom_end_request(drive, 0);
739 return ide_stopped;
740 }
741 rq->current_nr_sectors += nskip;
742 }
743 }
744 #if 0
745 else
746 /* the immediate bit */
747 rq->cmd[1] = 1 << 3;
748 #endif
749 /* set up the command */
750 rq->timeout = ATAPI_WAIT_PC;
751
752 /* send the command to the drive and return */
753 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
754 }
755
756 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
757 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
758 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
759
760 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
761 {
762 struct cdrom_info *info = drive->driver_data;
763 int stat;
764 static int retry = 10;
765
766 if (cdrom_decode_status(drive, 0, &stat))
767 return ide_stopped;
768
769 info->cd_flags |= IDE_CD_FLAG_SEEKING;
770
771 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
772 if (--retry == 0)
773 drive->dsc_overlap = 0;
774 }
775 return ide_stopped;
776 }
777
778 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
779 {
780 struct request *rq = HWGROUP(drive)->rq;
781 sector_t frame = rq->sector;
782
783 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
784
785 memset(rq->cmd, 0, BLK_MAX_CDB);
786 rq->cmd[0] = GPCMD_SEEK;
787 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
788
789 rq->timeout = ATAPI_WAIT_PC;
790 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
791 }
792
793 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
794 {
795 struct cdrom_info *info = drive->driver_data;
796
797 info->dma = 0;
798 info->start_seek = jiffies;
799 return cdrom_start_packet_command(drive, 0,
800 cdrom_start_seek_continuation);
801 }
802
803 /*
804 * Fix up a possibly partially-processed request so that we can start it over
805 * entirely, or even put it back on the request queue.
806 */
807 static void restore_request(struct request *rq)
808 {
809 if (rq->buffer != bio_data(rq->bio)) {
810 sector_t n =
811 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
812
813 rq->buffer = bio_data(rq->bio);
814 rq->nr_sectors += n;
815 rq->sector -= n;
816 }
817 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
818 rq->hard_cur_sectors = rq->current_nr_sectors;
819 rq->hard_nr_sectors = rq->nr_sectors;
820 rq->hard_sector = rq->sector;
821 rq->q->prep_rq_fn(rq->q, rq);
822 }
823
824 /*
825 * All other packet commands.
826 */
827 static void ide_cd_request_sense_fixup(struct request *rq)
828 {
829 /*
830 * Some of the trailing request sense fields are optional,
831 * and some drives don't send them. Sigh.
832 */
833 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
834 rq->data_len > 0 && rq->data_len <= 5)
835 while (rq->data_len > 0) {
836 *(u8 *)rq->data++ = 0;
837 --rq->data_len;
838 }
839 }
840
841 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
842 {
843 struct request_sense sense;
844 int retries = 10;
845 unsigned int flags = rq->cmd_flags;
846
847 if (rq->sense == NULL)
848 rq->sense = &sense;
849
850 /* start of retry loop */
851 do {
852 int error;
853 unsigned long time = jiffies;
854 rq->cmd_flags = flags;
855
856 error = ide_do_drive_cmd(drive, rq, ide_wait);
857 time = jiffies - time;
858
859 /*
860 * FIXME: we should probably abort/retry or something in case of
861 * failure.
862 */
863 if (rq->cmd_flags & REQ_FAILED) {
864 /*
865 * The request failed. Retry if it was due to a unit
866 * attention status (usually means media was changed).
867 */
868 struct request_sense *reqbuf = rq->sense;
869
870 if (reqbuf->sense_key == UNIT_ATTENTION)
871 cdrom_saw_media_change(drive);
872 else if (reqbuf->sense_key == NOT_READY &&
873 reqbuf->asc == 4 && reqbuf->ascq != 4) {
874 /*
875 * The drive is in the process of loading
876 * a disk. Retry, but wait a little to give
877 * the drive time to complete the load.
878 */
879 ssleep(2);
880 } else {
881 /* otherwise, don't retry */
882 retries = 0;
883 }
884 --retries;
885 }
886
887 /* end of retry loop */
888 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
889
890 /* return an error if the command failed */
891 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
892 }
893
894 /*
895 * Called from blk_end_request_callback() after the data of the request is
896 * completed and before the request itself is completed. By returning value '1',
897 * blk_end_request_callback() returns immediately without completing it.
898 */
899 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
900 {
901 return 1;
902 }
903
904 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
905 {
906 ide_hwif_t *hwif = drive->hwif;
907 struct cdrom_info *info = drive->driver_data;
908 struct request *rq = HWGROUP(drive)->rq;
909 xfer_func_t *xferfunc;
910 ide_expiry_t *expiry = NULL;
911 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
912 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
913 unsigned int timeout;
914 u8 lowcyl, highcyl;
915
916 /* check for errors */
917 dma = info->dma;
918 if (dma) {
919 info->dma = 0;
920 dma_error = hwif->dma_ops->dma_end(drive);
921 if (dma_error) {
922 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
923 write ? "write" : "read");
924 ide_dma_off(drive);
925 }
926 }
927
928 if (cdrom_decode_status(drive, 0, &stat))
929 return ide_stopped;
930
931 /* using dma, transfer is complete now */
932 if (dma) {
933 if (dma_error)
934 return ide_error(drive, "dma error", stat);
935 if (blk_fs_request(rq)) {
936 ide_end_request(drive, 1, rq->nr_sectors);
937 return ide_stopped;
938 }
939 goto end_request;
940 }
941
942 /* ok we fall to pio :/ */
943 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
944 lowcyl = hwif->INB(hwif->io_ports.lbam_addr);
945 highcyl = hwif->INB(hwif->io_ports.lbah_addr);
946
947 len = lowcyl + (256 * highcyl);
948
949 thislen = blk_fs_request(rq) ? len : rq->data_len;
950 if (thislen > len)
951 thislen = len;
952
953 /* If DRQ is clear, the command has completed. */
954 if ((stat & DRQ_STAT) == 0) {
955 if (blk_fs_request(rq)) {
956 /*
957 * If we're not done reading/writing, complain.
958 * Otherwise, complete the command normally.
959 */
960 uptodate = 1;
961 if (rq->current_nr_sectors > 0) {
962 printk(KERN_ERR "%s: %s: data underrun "
963 "(%d blocks)\n",
964 drive->name, __func__,
965 rq->current_nr_sectors);
966 if (!write)
967 rq->cmd_flags |= REQ_FAILED;
968 uptodate = 0;
969 }
970 cdrom_end_request(drive, uptodate);
971 return ide_stopped;
972 } else if (!blk_pc_request(rq)) {
973 ide_cd_request_sense_fixup(rq);
974 /* complain if we still have data left to transfer */
975 uptodate = rq->data_len ? 0 : 1;
976 }
977 goto end_request;
978 }
979
980 /* check which way to transfer data */
981 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
982 return ide_stopped;
983
984 if (blk_fs_request(rq)) {
985 if (write == 0) {
986 int nskip;
987
988 if (ide_cd_check_transfer_size(drive, len)) {
989 cdrom_end_request(drive, 0);
990 return ide_stopped;
991 }
992
993 /*
994 * First, figure out if we need to bit-bucket
995 * any of the leading sectors.
996 */
997 nskip = min_t(int, rq->current_nr_sectors
998 - bio_cur_sectors(rq->bio),
999 thislen >> 9);
1000 if (nskip > 0) {
1001 ide_cd_drain_data(drive, nskip);
1002 rq->current_nr_sectors -= nskip;
1003 thislen -= (nskip << 9);
1004 }
1005 }
1006 }
1007
1008 if (ireason == 0) {
1009 write = 1;
1010 xferfunc = hwif->output_data;
1011 } else {
1012 write = 0;
1013 xferfunc = hwif->input_data;
1014 }
1015
1016 /* transfer data */
1017 while (thislen > 0) {
1018 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1019 int blen = rq->data_len;
1020
1021 /* bio backed? */
1022 if (rq->bio) {
1023 if (blk_fs_request(rq)) {
1024 ptr = rq->buffer;
1025 blen = rq->current_nr_sectors << 9;
1026 } else {
1027 ptr = bio_data(rq->bio);
1028 blen = bio_iovec(rq->bio)->bv_len;
1029 }
1030 }
1031
1032 if (!ptr) {
1033 if (blk_fs_request(rq) && !write)
1034 /*
1035 * If the buffers are full, pipe the rest into
1036 * oblivion.
1037 */
1038 ide_cd_drain_data(drive, thislen >> 9);
1039 else {
1040 printk(KERN_ERR "%s: confused, missing data\n",
1041 drive->name);
1042 blk_dump_rq_flags(rq, rq_data_dir(rq)
1043 ? "cdrom_newpc_intr, write"
1044 : "cdrom_newpc_intr, read");
1045 }
1046 break;
1047 }
1048
1049 if (blen > thislen)
1050 blen = thislen;
1051
1052 xferfunc(drive, NULL, ptr, blen);
1053
1054 thislen -= blen;
1055 len -= blen;
1056
1057 if (blk_fs_request(rq)) {
1058 rq->buffer += blen;
1059 rq->nr_sectors -= (blen >> 9);
1060 rq->current_nr_sectors -= (blen >> 9);
1061 rq->sector += (blen >> 9);
1062
1063 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1064 cdrom_end_request(drive, 1);
1065 } else {
1066 rq->data_len -= blen;
1067
1068 /*
1069 * The request can't be completed until DRQ is cleared.
1070 * So complete the data, but don't complete the request
1071 * using the dummy function for the callback feature
1072 * of blk_end_request_callback().
1073 */
1074 if (rq->bio)
1075 blk_end_request_callback(rq, 0, blen,
1076 cdrom_newpc_intr_dummy_cb);
1077 else
1078 rq->data += blen;
1079 }
1080 if (!write && blk_sense_request(rq))
1081 rq->sense_len += blen;
1082 }
1083
1084 /* pad, if necessary */
1085 if (!blk_fs_request(rq) && len > 0)
1086 ide_cd_pad_transfer(drive, xferfunc, len);
1087
1088 if (blk_pc_request(rq)) {
1089 timeout = rq->timeout;
1090 } else {
1091 timeout = ATAPI_WAIT_PC;
1092 if (!blk_fs_request(rq))
1093 expiry = cdrom_timer_expiry;
1094 }
1095
1096 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1097 return ide_started;
1098
1099 end_request:
1100 if (blk_pc_request(rq)) {
1101 unsigned long flags;
1102 unsigned int dlen = rq->data_len;
1103
1104 if (dma)
1105 rq->data_len = 0;
1106
1107 spin_lock_irqsave(&ide_lock, flags);
1108 if (__blk_end_request(rq, 0, dlen))
1109 BUG();
1110 HWGROUP(drive)->rq = NULL;
1111 spin_unlock_irqrestore(&ide_lock, flags);
1112 } else {
1113 if (!uptodate)
1114 rq->cmd_flags |= REQ_FAILED;
1115 cdrom_end_request(drive, uptodate);
1116 }
1117 return ide_stopped;
1118 }
1119
1120 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1121 {
1122 struct cdrom_info *cd = drive->driver_data;
1123 int write = rq_data_dir(rq) == WRITE;
1124 unsigned short sectors_per_frame =
1125 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1126
1127 if (write) {
1128 /* disk has become write protected */
1129 if (cd->disk->policy) {
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 restore_request(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 cd->dma = 0;
1149 } else
1150 cd->dma = drive->using_dma;
1151
1152 if (write)
1153 cd->devinfo.media_written = 1;
1154
1155 /* start sending the read/write request to the drive */
1156 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1157 }
1158
1159 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1160 {
1161 struct request *rq = HWGROUP(drive)->rq;
1162
1163 if (!rq->timeout)
1164 rq->timeout = ATAPI_WAIT_PC;
1165
1166 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1167 }
1168
1169 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1170 {
1171 struct cdrom_info *info = drive->driver_data;
1172
1173 if (blk_pc_request(rq))
1174 rq->cmd_flags |= REQ_QUIET;
1175 else
1176 rq->cmd_flags &= ~REQ_FAILED;
1177
1178 info->dma = 0;
1179
1180 /* sg request */
1181 if (rq->bio) {
1182 int mask = drive->queue->dma_alignment;
1183 unsigned long addr =
1184 (unsigned long)page_address(bio_page(rq->bio));
1185
1186 info->dma = drive->using_dma;
1187
1188 /*
1189 * check if dma is safe
1190 *
1191 * NOTE! The "len" and "addr" checks should possibly have
1192 * separate masks.
1193 */
1194 if ((rq->data_len & 15) || (addr & mask))
1195 info->dma = 0;
1196 }
1197
1198 /* start sending the command to the drive */
1199 return cdrom_start_packet_command(drive, rq->data_len,
1200 cdrom_do_newpc_cont);
1201 }
1202
1203 /*
1204 * cdrom driver request routine.
1205 */
1206 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1207 sector_t block)
1208 {
1209 ide_startstop_t action;
1210 struct cdrom_info *info = drive->driver_data;
1211
1212 if (blk_fs_request(rq)) {
1213 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1214 unsigned long elapsed = jiffies - info->start_seek;
1215 int stat = ide_read_status(drive);
1216
1217 if ((stat & SEEK_STAT) != SEEK_STAT) {
1218 if (elapsed < IDECD_SEEK_TIMEOUT) {
1219 ide_stall_queue(drive,
1220 IDECD_SEEK_TIMER);
1221 return ide_stopped;
1222 }
1223 printk(KERN_ERR "%s: DSC timeout\n",
1224 drive->name);
1225 }
1226 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1227 }
1228 if (rq_data_dir(rq) == READ &&
1229 IDE_LARGE_SEEK(info->last_block, block,
1230 IDECD_SEEK_THRESHOLD) &&
1231 drive->dsc_overlap)
1232 action = cdrom_start_seek(drive, block);
1233 else
1234 action = cdrom_start_rw(drive, rq);
1235 info->last_block = block;
1236 return action;
1237 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1238 rq->cmd_type == REQ_TYPE_ATA_PC) {
1239 return cdrom_do_block_pc(drive, rq);
1240 } else if (blk_special_request(rq)) {
1241 /* right now this can only be a reset... */
1242 cdrom_end_request(drive, 1);
1243 return ide_stopped;
1244 }
1245
1246 blk_dump_rq_flags(rq, "ide-cd bad flags");
1247 cdrom_end_request(drive, 0);
1248 return ide_stopped;
1249 }
1250
1251
1252
1253 /*
1254 * Ioctl handling.
1255 *
1256 * Routines which queue packet commands take as a final argument a pointer to a
1257 * request_sense struct. If execution of the command results in an error with a
1258 * CHECK CONDITION status, this structure will be filled with the results of the
1259 * subsequent request sense command. The pointer can also be NULL, in which case
1260 * no sense information is returned.
1261 */
1262 static void msf_from_bcd(struct atapi_msf *msf)
1263 {
1264 msf->minute = BCD2BIN(msf->minute);
1265 msf->second = BCD2BIN(msf->second);
1266 msf->frame = BCD2BIN(msf->frame);
1267 }
1268
1269 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1270 {
1271 struct request req;
1272 struct cdrom_info *info = drive->driver_data;
1273 struct cdrom_device_info *cdi = &info->devinfo;
1274
1275 ide_cd_init_rq(drive, &req);
1276
1277 req.sense = sense;
1278 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1279 req.cmd_flags |= REQ_QUIET;
1280
1281 /*
1282 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1283 * instead of supporting the LOAD_UNLOAD opcode.
1284 */
1285 req.cmd[7] = cdi->sanyo_slot % 3;
1286
1287 return ide_cd_queue_pc(drive, &req);
1288 }
1289
1290 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1291 unsigned long *sectors_per_frame,
1292 struct request_sense *sense)
1293 {
1294 struct {
1295 __u32 lba;
1296 __u32 blocklen;
1297 } capbuf;
1298
1299 int stat;
1300 struct request req;
1301
1302 ide_cd_init_rq(drive, &req);
1303
1304 req.sense = sense;
1305 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1306 req.data = (char *)&capbuf;
1307 req.data_len = sizeof(capbuf);
1308 req.cmd_flags |= REQ_QUIET;
1309
1310 stat = ide_cd_queue_pc(drive, &req);
1311 if (stat == 0) {
1312 *capacity = 1 + be32_to_cpu(capbuf.lba);
1313 *sectors_per_frame =
1314 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1315 }
1316
1317 return stat;
1318 }
1319
1320 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1321 int format, char *buf, int buflen,
1322 struct request_sense *sense)
1323 {
1324 struct request req;
1325
1326 ide_cd_init_rq(drive, &req);
1327
1328 req.sense = sense;
1329 req.data = buf;
1330 req.data_len = buflen;
1331 req.cmd_flags |= REQ_QUIET;
1332 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1333 req.cmd[6] = trackno;
1334 req.cmd[7] = (buflen >> 8);
1335 req.cmd[8] = (buflen & 0xff);
1336 req.cmd[9] = (format << 6);
1337
1338 if (msf_flag)
1339 req.cmd[1] = 2;
1340
1341 return ide_cd_queue_pc(drive, &req);
1342 }
1343
1344 /* Try to read the entire TOC for the disk into our internal buffer. */
1345 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1346 {
1347 int stat, ntracks, i;
1348 struct cdrom_info *info = drive->driver_data;
1349 struct cdrom_device_info *cdi = &info->devinfo;
1350 struct atapi_toc *toc = info->toc;
1351 struct {
1352 struct atapi_toc_header hdr;
1353 struct atapi_toc_entry ent;
1354 } ms_tmp;
1355 long last_written;
1356 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1357
1358 if (toc == NULL) {
1359 /* try to allocate space */
1360 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1361 if (toc == NULL) {
1362 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1363 drive->name);
1364 return -ENOMEM;
1365 }
1366 info->toc = toc;
1367 }
1368
1369 /*
1370 * Check to see if the existing data is still valid. If it is,
1371 * just return.
1372 */
1373 (void) cdrom_check_status(drive, sense);
1374
1375 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1376 return 0;
1377
1378 /* try to get the total cdrom capacity and sector size */
1379 stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1380 sense);
1381 if (stat)
1382 toc->capacity = 0x1fffff;
1383
1384 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1385 /* save a private copy of the TOC capacity for error handling */
1386 drive->probed_capacity = toc->capacity * sectors_per_frame;
1387
1388 blk_queue_hardsect_size(drive->queue,
1389 sectors_per_frame << SECTOR_BITS);
1390
1391 /* first read just the header, so we know how long the TOC is */
1392 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1393 sizeof(struct atapi_toc_header), sense);
1394 if (stat)
1395 return stat;
1396
1397 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1398 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1399 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1400 }
1401
1402 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1403 if (ntracks <= 0)
1404 return -EIO;
1405 if (ntracks > MAX_TRACKS)
1406 ntracks = MAX_TRACKS;
1407
1408 /* now read the whole schmeer */
1409 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1410 (char *)&toc->hdr,
1411 sizeof(struct atapi_toc_header) +
1412 (ntracks + 1) *
1413 sizeof(struct atapi_toc_entry), sense);
1414
1415 if (stat && toc->hdr.first_track > 1) {
1416 /*
1417 * Cds with CDI tracks only don't have any TOC entries, despite
1418 * of this the returned values are
1419 * first_track == last_track = number of CDI tracks + 1,
1420 * so that this case is indistinguishable from the same layout
1421 * plus an additional audio track. If we get an error for the
1422 * regular case, we assume a CDI without additional audio
1423 * tracks. In this case the readable TOC is empty (CDI tracks
1424 * are not included) and only holds the Leadout entry.
1425 *
1426 * Heiko Eißfeldt.
1427 */
1428 ntracks = 0;
1429 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1430 (char *)&toc->hdr,
1431 sizeof(struct atapi_toc_header) +
1432 (ntracks + 1) *
1433 sizeof(struct atapi_toc_entry),
1434 sense);
1435 if (stat)
1436 return stat;
1437
1438 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1439 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1440 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1441 } else {
1442 toc->hdr.first_track = CDROM_LEADOUT;
1443 toc->hdr.last_track = CDROM_LEADOUT;
1444 }
1445 }
1446
1447 if (stat)
1448 return stat;
1449
1450 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1451
1452 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1453 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1454 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1455 }
1456
1457 for (i = 0; i <= ntracks; i++) {
1458 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1459 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1460 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1461 msf_from_bcd(&toc->ent[i].addr.msf);
1462 }
1463 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1464 toc->ent[i].addr.msf.second,
1465 toc->ent[i].addr.msf.frame);
1466 }
1467
1468 if (toc->hdr.first_track != CDROM_LEADOUT) {
1469 /* read the multisession information */
1470 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1471 sizeof(ms_tmp), sense);
1472 if (stat)
1473 return stat;
1474
1475 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1476 } else {
1477 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1478 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1479 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1480 }
1481
1482 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1483 /* re-read multisession information using MSF format */
1484 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1485 sizeof(ms_tmp), sense);
1486 if (stat)
1487 return stat;
1488
1489 msf_from_bcd(&ms_tmp.ent.addr.msf);
1490 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1491 ms_tmp.ent.addr.msf.second,
1492 ms_tmp.ent.addr.msf.frame);
1493 }
1494
1495 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1496
1497 /* now try to get the total cdrom capacity */
1498 stat = cdrom_get_last_written(cdi, &last_written);
1499 if (!stat && (last_written > toc->capacity)) {
1500 toc->capacity = last_written;
1501 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1502 drive->probed_capacity = toc->capacity * sectors_per_frame;
1503 }
1504
1505 /* Remember that we've read this stuff. */
1506 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1507
1508 return 0;
1509 }
1510
1511 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1512 {
1513 struct cdrom_info *info = drive->driver_data;
1514 struct cdrom_device_info *cdi = &info->devinfo;
1515 struct packet_command cgc;
1516 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1517
1518 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1519 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1520
1521 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1522 do {
1523 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1524 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1525 if (!stat)
1526 break;
1527 } while (--attempts);
1528 return stat;
1529 }
1530
1531 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1532 {
1533 struct cdrom_info *cd = drive->driver_data;
1534 u16 curspeed, maxspeed;
1535
1536 curspeed = *(u16 *)&buf[8 + 14];
1537 maxspeed = *(u16 *)&buf[8 + 8];
1538
1539 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1540 curspeed = le16_to_cpu(curspeed);
1541 maxspeed = le16_to_cpu(maxspeed);
1542 } else {
1543 curspeed = be16_to_cpu(curspeed);
1544 maxspeed = be16_to_cpu(maxspeed);
1545 }
1546
1547 cd->current_speed = (curspeed + (176/2)) / 176;
1548 cd->max_speed = (maxspeed + (176/2)) / 176;
1549 }
1550
1551 #define IDE_CD_CAPABILITIES \
1552 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1553 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1554 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1555 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1556 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1557
1558 static struct cdrom_device_ops ide_cdrom_dops = {
1559 .open = ide_cdrom_open_real,
1560 .release = ide_cdrom_release_real,
1561 .drive_status = ide_cdrom_drive_status,
1562 .media_changed = ide_cdrom_check_media_change_real,
1563 .tray_move = ide_cdrom_tray_move,
1564 .lock_door = ide_cdrom_lock_door,
1565 .select_speed = ide_cdrom_select_speed,
1566 .get_last_session = ide_cdrom_get_last_session,
1567 .get_mcn = ide_cdrom_get_mcn,
1568 .reset = ide_cdrom_reset,
1569 .audio_ioctl = ide_cdrom_audio_ioctl,
1570 .capability = IDE_CD_CAPABILITIES,
1571 .generic_packet = ide_cdrom_packet,
1572 };
1573
1574 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1575 {
1576 struct cdrom_info *info = drive->driver_data;
1577 struct cdrom_device_info *devinfo = &info->devinfo;
1578
1579 devinfo->ops = &ide_cdrom_dops;
1580 devinfo->speed = info->current_speed;
1581 devinfo->capacity = nslots;
1582 devinfo->handle = drive;
1583 strcpy(devinfo->name, drive->name);
1584
1585 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1586 devinfo->mask |= CDC_SELECT_SPEED;
1587
1588 devinfo->disk = info->disk;
1589 return register_cdrom(devinfo);
1590 }
1591
1592 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1593 {
1594 struct cdrom_info *cd = drive->driver_data;
1595 struct cdrom_device_info *cdi = &cd->devinfo;
1596 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1597 mechtype_t mechtype;
1598 int nslots = 1;
1599
1600 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1601 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1602 CDC_MO_DRIVE | CDC_RAM);
1603
1604 if (drive->media == ide_optical) {
1605 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1606 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1607 drive->name);
1608 return nslots;
1609 }
1610
1611 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1612 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1613 cdi->mask &= ~CDC_PLAY_AUDIO;
1614 return nslots;
1615 }
1616
1617 /*
1618 * We have to cheat a little here. the packet will eventually be queued
1619 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1620 * Since this device hasn't been registered with the Uniform layer yet,
1621 * it can't do this. Same goes for cdi->ops.
1622 */
1623 cdi->handle = drive;
1624 cdi->ops = &ide_cdrom_dops;
1625
1626 if (ide_cdrom_get_capabilities(drive, buf))
1627 return 0;
1628
1629 if ((buf[8 + 6] & 0x01) == 0)
1630 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1631 if (buf[8 + 6] & 0x08)
1632 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1633 if (buf[8 + 3] & 0x01)
1634 cdi->mask &= ~CDC_CD_R;
1635 if (buf[8 + 3] & 0x02)
1636 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1637 if (buf[8 + 2] & 0x38)
1638 cdi->mask &= ~CDC_DVD;
1639 if (buf[8 + 3] & 0x20)
1640 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1641 if (buf[8 + 3] & 0x10)
1642 cdi->mask &= ~CDC_DVD_R;
1643 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1644 cdi->mask &= ~CDC_PLAY_AUDIO;
1645
1646 mechtype = buf[8 + 6] >> 5;
1647 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1648 cdi->mask |= CDC_CLOSE_TRAY;
1649
1650 if (cdi->sanyo_slot > 0) {
1651 cdi->mask &= ~CDC_SELECT_DISC;
1652 nslots = 3;
1653 } else if (mechtype == mechtype_individual_changer ||
1654 mechtype == mechtype_cartridge_changer) {
1655 nslots = cdrom_number_of_slots(cdi);
1656 if (nslots > 1)
1657 cdi->mask &= ~CDC_SELECT_DISC;
1658 }
1659
1660 ide_cdrom_update_speed(drive, buf);
1661
1662 printk(KERN_INFO "%s: ATAPI", drive->name);
1663
1664 /* don't print speed if the drive reported 0 */
1665 if (cd->max_speed)
1666 printk(KERN_CONT " %dX", cd->max_speed);
1667
1668 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1669
1670 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1671 printk(KERN_CONT " DVD%s%s",
1672 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1673 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1674
1675 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1676 printk(KERN_CONT " CD%s%s",
1677 (cdi->mask & CDC_CD_R) ? "" : "-R",
1678 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1679
1680 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1681 printk(KERN_CONT " changer w/%d slots", nslots);
1682 else
1683 printk(KERN_CONT " drive");
1684
1685 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1686
1687 return nslots;
1688 }
1689
1690 /* standard prep_rq_fn that builds 10 byte cmds */
1691 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1692 {
1693 int hard_sect = queue_hardsect_size(q);
1694 long block = (long)rq->hard_sector / (hard_sect >> 9);
1695 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1696
1697 memset(rq->cmd, 0, BLK_MAX_CDB);
1698
1699 if (rq_data_dir(rq) == READ)
1700 rq->cmd[0] = GPCMD_READ_10;
1701 else
1702 rq->cmd[0] = GPCMD_WRITE_10;
1703
1704 /*
1705 * fill in lba
1706 */
1707 rq->cmd[2] = (block >> 24) & 0xff;
1708 rq->cmd[3] = (block >> 16) & 0xff;
1709 rq->cmd[4] = (block >> 8) & 0xff;
1710 rq->cmd[5] = block & 0xff;
1711
1712 /*
1713 * and transfer length
1714 */
1715 rq->cmd[7] = (blocks >> 8) & 0xff;
1716 rq->cmd[8] = blocks & 0xff;
1717 rq->cmd_len = 10;
1718 return BLKPREP_OK;
1719 }
1720
1721 /*
1722 * Most of the SCSI commands are supported directly by ATAPI devices.
1723 * This transform handles the few exceptions.
1724 */
1725 static int ide_cdrom_prep_pc(struct request *rq)
1726 {
1727 u8 *c = rq->cmd;
1728
1729 /* transform 6-byte read/write commands to the 10-byte version */
1730 if (c[0] == READ_6 || c[0] == WRITE_6) {
1731 c[8] = c[4];
1732 c[5] = c[3];
1733 c[4] = c[2];
1734 c[3] = c[1] & 0x1f;
1735 c[2] = 0;
1736 c[1] &= 0xe0;
1737 c[0] += (READ_10 - READ_6);
1738 rq->cmd_len = 10;
1739 return BLKPREP_OK;
1740 }
1741
1742 /*
1743 * it's silly to pretend we understand 6-byte sense commands, just
1744 * reject with ILLEGAL_REQUEST and the caller should take the
1745 * appropriate action
1746 */
1747 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1748 rq->errors = ILLEGAL_REQUEST;
1749 return BLKPREP_KILL;
1750 }
1751
1752 return BLKPREP_OK;
1753 }
1754
1755 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1756 {
1757 if (blk_fs_request(rq))
1758 return ide_cdrom_prep_fs(q, rq);
1759 else if (blk_pc_request(rq))
1760 return ide_cdrom_prep_pc(rq);
1761
1762 return 0;
1763 }
1764
1765 struct cd_list_entry {
1766 const char *id_model;
1767 const char *id_firmware;
1768 unsigned int cd_flags;
1769 };
1770
1771 #ifdef CONFIG_IDE_PROC_FS
1772 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1773 {
1774 unsigned long capacity, sectors_per_frame;
1775
1776 if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1777 return 0;
1778
1779 return capacity * sectors_per_frame;
1780 }
1781
1782 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1783 int count, int *eof, void *data)
1784 {
1785 ide_drive_t *drive = data;
1786 int len;
1787
1788 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1789 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1790 }
1791
1792 static ide_proc_entry_t idecd_proc[] = {
1793 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1794 { NULL, 0, NULL, NULL }
1795 };
1796
1797 static void ide_cdrom_add_settings(ide_drive_t *drive)
1798 {
1799 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1800 &drive->dsc_overlap, NULL);
1801 }
1802 #else
1803 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1804 #endif
1805
1806 static const struct cd_list_entry ide_cd_quirks_list[] = {
1807 /* Limit transfer size per interrupt. */
1808 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1809 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1810 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1811 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
1812 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1813 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1814 IDE_CD_FLAG_PRE_ATAPI12, },
1815 /* Vertos 300, some versions of this drive like to talk BCD. */
1816 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
1817 /* Vertos 600 ESD. */
1818 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
1819 /*
1820 * Sanyo 3 CD changer uses a non-standard command for CD changing
1821 * (by default standard ATAPI support for CD changers is used).
1822 */
1823 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
1824 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
1825 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
1826 /* Stingray 8X CD-ROM. */
1827 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1828 /*
1829 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1830 * mode sense page capabilities size, but older drives break.
1831 */
1832 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1833 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1834 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1835 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
1836 /*
1837 * Some drives used by Apple don't advertise audio play
1838 * but they do support reading TOC & audio datas.
1839 */
1840 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1841 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1842 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1843 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1844 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1845 { NULL, NULL, 0 }
1846 };
1847
1848 static unsigned int ide_cd_flags(struct hd_driveid *id)
1849 {
1850 const struct cd_list_entry *cle = ide_cd_quirks_list;
1851
1852 while (cle->id_model) {
1853 if (strcmp(cle->id_model, id->model) == 0 &&
1854 (cle->id_firmware == NULL ||
1855 strstr(id->fw_rev, cle->id_firmware)))
1856 return cle->cd_flags;
1857 cle++;
1858 }
1859
1860 return 0;
1861 }
1862
1863 static int ide_cdrom_setup(ide_drive_t *drive)
1864 {
1865 struct cdrom_info *cd = drive->driver_data;
1866 struct cdrom_device_info *cdi = &cd->devinfo;
1867 struct hd_driveid *id = drive->id;
1868 int nslots;
1869
1870 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1871 blk_queue_dma_alignment(drive->queue, 31);
1872 drive->queue->unplug_delay = (1 * HZ) / 1000;
1873 if (!drive->queue->unplug_delay)
1874 drive->queue->unplug_delay = 1;
1875
1876 drive->special.all = 0;
1877
1878 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1879 ide_cd_flags(id);
1880
1881 if ((id->config & 0x0060) == 0x20)
1882 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1883
1884 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1885 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1886 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1887 IDE_CD_FLAG_TOCADDR_AS_BCD);
1888 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1889 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1890 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1891 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1892 /* 3 => use CD in slot 0 */
1893 cdi->sanyo_slot = 3;
1894
1895 nslots = ide_cdrom_probe_capabilities(drive);
1896
1897 /* set correct block size */
1898 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1899
1900 drive->dsc_overlap = (drive->next != drive);
1901
1902 if (ide_cdrom_register(drive, nslots)) {
1903 printk(KERN_ERR "%s: %s failed to register device with the"
1904 " cdrom driver.\n", drive->name, __func__);
1905 cd->devinfo.handle = NULL;
1906 return 1;
1907 }
1908 ide_cdrom_add_settings(drive);
1909 return 0;
1910 }
1911
1912 static void ide_cd_remove(ide_drive_t *drive)
1913 {
1914 struct cdrom_info *info = drive->driver_data;
1915
1916 ide_proc_unregister_driver(drive, info->driver);
1917
1918 del_gendisk(info->disk);
1919
1920 ide_cd_put(info);
1921 }
1922
1923 static void ide_cd_release(struct kref *kref)
1924 {
1925 struct cdrom_info *info = to_ide_cd(kref);
1926 struct cdrom_device_info *devinfo = &info->devinfo;
1927 ide_drive_t *drive = info->drive;
1928 struct gendisk *g = info->disk;
1929
1930 kfree(info->toc);
1931 if (devinfo->handle == drive)
1932 unregister_cdrom(devinfo);
1933 drive->dsc_overlap = 0;
1934 drive->driver_data = NULL;
1935 blk_queue_prep_rq(drive->queue, NULL);
1936 g->private_data = NULL;
1937 put_disk(g);
1938 kfree(info);
1939 }
1940
1941 static int ide_cd_probe(ide_drive_t *);
1942
1943 static ide_driver_t ide_cdrom_driver = {
1944 .gen_driver = {
1945 .owner = THIS_MODULE,
1946 .name = "ide-cdrom",
1947 .bus = &ide_bus_type,
1948 },
1949 .probe = ide_cd_probe,
1950 .remove = ide_cd_remove,
1951 .version = IDECD_VERSION,
1952 .media = ide_cdrom,
1953 .supports_dsc_overlap = 1,
1954 .do_request = ide_do_rw_cdrom,
1955 .end_request = ide_end_request,
1956 .error = __ide_error,
1957 .abort = __ide_abort,
1958 #ifdef CONFIG_IDE_PROC_FS
1959 .proc = idecd_proc,
1960 #endif
1961 };
1962
1963 static int idecd_open(struct inode *inode, struct file *file)
1964 {
1965 struct gendisk *disk = inode->i_bdev->bd_disk;
1966 struct cdrom_info *info;
1967 int rc = -ENOMEM;
1968
1969 info = ide_cd_get(disk);
1970 if (!info)
1971 return -ENXIO;
1972
1973 rc = cdrom_open(&info->devinfo, inode, file);
1974
1975 if (rc < 0)
1976 ide_cd_put(info);
1977
1978 return rc;
1979 }
1980
1981 static int idecd_release(struct inode *inode, struct file *file)
1982 {
1983 struct gendisk *disk = inode->i_bdev->bd_disk;
1984 struct cdrom_info *info = ide_cd_g(disk);
1985
1986 cdrom_release(&info->devinfo, file);
1987
1988 ide_cd_put(info);
1989
1990 return 0;
1991 }
1992
1993 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1994 {
1995 struct packet_command cgc;
1996 char buffer[16];
1997 int stat;
1998 char spindown;
1999
2000 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2001 return -EFAULT;
2002
2003 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2004
2005 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2006 if (stat)
2007 return stat;
2008
2009 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2010 return cdrom_mode_select(cdi, &cgc);
2011 }
2012
2013 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2014 {
2015 struct packet_command cgc;
2016 char buffer[16];
2017 int stat;
2018 char spindown;
2019
2020 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2021
2022 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2023 if (stat)
2024 return stat;
2025
2026 spindown = buffer[11] & 0x0f;
2027 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2028 return -EFAULT;
2029 return 0;
2030 }
2031
2032 static int idecd_ioctl(struct inode *inode, struct file *file,
2033 unsigned int cmd, unsigned long arg)
2034 {
2035 struct block_device *bdev = inode->i_bdev;
2036 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2037 int err;
2038
2039 switch (cmd) {
2040 case CDROMSETSPINDOWN:
2041 return idecd_set_spindown(&info->devinfo, arg);
2042 case CDROMGETSPINDOWN:
2043 return idecd_get_spindown(&info->devinfo, arg);
2044 default:
2045 break;
2046 }
2047
2048 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2049 if (err == -EINVAL)
2050 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2051
2052 return err;
2053 }
2054
2055 static int idecd_media_changed(struct gendisk *disk)
2056 {
2057 struct cdrom_info *info = ide_cd_g(disk);
2058 return cdrom_media_changed(&info->devinfo);
2059 }
2060
2061 static int idecd_revalidate_disk(struct gendisk *disk)
2062 {
2063 struct cdrom_info *info = ide_cd_g(disk);
2064 struct request_sense sense;
2065
2066 ide_cd_read_toc(info->drive, &sense);
2067
2068 return 0;
2069 }
2070
2071 static struct block_device_operations idecd_ops = {
2072 .owner = THIS_MODULE,
2073 .open = idecd_open,
2074 .release = idecd_release,
2075 .ioctl = idecd_ioctl,
2076 .media_changed = idecd_media_changed,
2077 .revalidate_disk = idecd_revalidate_disk
2078 };
2079
2080 /* module options */
2081 static char *ignore;
2082
2083 module_param(ignore, charp, 0400);
2084 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2085
2086 static int ide_cd_probe(ide_drive_t *drive)
2087 {
2088 struct cdrom_info *info;
2089 struct gendisk *g;
2090 struct request_sense sense;
2091
2092 if (!strstr("ide-cdrom", drive->driver_req))
2093 goto failed;
2094 if (!drive->present)
2095 goto failed;
2096 if (drive->media != ide_cdrom && drive->media != ide_optical)
2097 goto failed;
2098 /* skip drives that we were told to ignore */
2099 if (ignore != NULL) {
2100 if (strstr(ignore, drive->name)) {
2101 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2102 drive->name);
2103 goto failed;
2104 }
2105 }
2106 if (drive->scsi) {
2107 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi "
2108 "emulation.\n", drive->name);
2109 goto failed;
2110 }
2111 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2112 if (info == NULL) {
2113 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2114 drive->name);
2115 goto failed;
2116 }
2117
2118 g = alloc_disk(1 << PARTN_BITS);
2119 if (!g)
2120 goto out_free_cd;
2121
2122 ide_init_disk(g, drive);
2123
2124 ide_proc_register_driver(drive, &ide_cdrom_driver);
2125
2126 kref_init(&info->kref);
2127
2128 info->drive = drive;
2129 info->driver = &ide_cdrom_driver;
2130 info->disk = g;
2131
2132 g->private_data = &info->driver;
2133
2134 drive->driver_data = info;
2135
2136 g->minors = 1;
2137 g->driverfs_dev = &drive->gendev;
2138 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2139 if (ide_cdrom_setup(drive)) {
2140 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2141 ide_cd_release(&info->kref);
2142 goto failed;
2143 }
2144
2145 ide_cd_read_toc(drive, &sense);
2146 g->fops = &idecd_ops;
2147 g->flags |= GENHD_FL_REMOVABLE;
2148 add_disk(g);
2149 return 0;
2150
2151 out_free_cd:
2152 kfree(info);
2153 failed:
2154 return -ENODEV;
2155 }
2156
2157 static void __exit ide_cdrom_exit(void)
2158 {
2159 driver_unregister(&ide_cdrom_driver.gen_driver);
2160 }
2161
2162 static int __init ide_cdrom_init(void)
2163 {
2164 return driver_register(&ide_cdrom_driver.gen_driver);
2165 }
2166
2167 MODULE_ALIAS("ide:*m-cdrom*");
2168 MODULE_ALIAS("ide-cd");
2169 module_init(ide_cdrom_init);
2170 module_exit(ide_cdrom_exit);
2171 MODULE_LICENSE("GPL");
Linux for Ginger Game Console