2 * linux/drivers/ide/ide-cd.c
4 * Copyright (C) 1994, 1995, 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>
8 * May be copied or modified under the terms of the GNU General Public
9 * License. See linux/COPYING for more information.
11 * ATAPI CD-ROM driver. To be used with ide.c.
12 * See Documentation/cdrom/ide-cd for usage information.
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
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
22 * Drives that deviate from these standards will be accommodated as much
23 * as possible via compile time or command-line options. Since I only have
24 * a few drives, you generally need to send me patches...
26 * ----------------------------------
28 * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on
31 * For historical changelog please see:
32 * Documentation/ide/ChangeLog.ide-cd.1994-2004
35 #define IDECD_VERSION "4.61"
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/kernel.h>
40 #include <linux/delay.h>
41 #include <linux/timer.h>
42 #include <linux/slab.h>
43 #include <linux/interrupt.h>
44 #include <linux/errno.h>
45 #include <linux/cdrom.h>
46 #include <linux/ide.h>
47 #include <linux/completion.h>
48 #include <linux/mutex.h>
49 #include <linux/bcd.h>
51 #include <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */
55 #include <asm/byteorder.h>
56 #include <asm/uaccess.h>
57 #include <asm/unaligned.h>
61 static DEFINE_MUTEX(idecd_ref_mutex);
63 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
65 #define ide_cd_g(disk) \
66 container_of((disk)->private_data, struct cdrom_info, driver)
68 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
70 struct cdrom_info *cd = NULL;
72 mutex_lock(&idecd_ref_mutex);
76 mutex_unlock(&idecd_ref_mutex);
80 static void ide_cd_release(struct kref *);
82 static void ide_cd_put(struct cdrom_info *cd)
84 mutex_lock(&idecd_ref_mutex);
85 kref_put(&cd->kref, ide_cd_release);
86 mutex_unlock(&idecd_ref_mutex);
89 /****************************************************************************
90 * Generic packet command support and error handling routines.
93 /* Mark that we've seen a media change, and invalidate our internal
95 static void cdrom_saw_media_change (ide_drive_t *drive)
97 struct cdrom_info *cd = drive->driver_data;
99 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
100 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
101 cd->nsectors_buffered = 0;
104 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
105 struct request_sense *sense)
109 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
112 switch (sense->sense_key) {
113 case NO_SENSE: case RECOVERED_ERROR:
117 * don't care about tray state messages for
118 * e.g. capacity commands or in-progress or
121 if (sense->asc == 0x3a || sense->asc == 0x04)
125 case ILLEGAL_REQUEST:
127 * don't log START_STOP unit with LoEj set, since
128 * we cannot reliably check if drive can auto-close
130 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
136 * Make good and sure we've seen this potential media
137 * change. Some drives (i.e. Creative) fail to present
138 * the correct sense key in the error register.
140 cdrom_saw_media_change(drive);
150 void cdrom_analyze_sense_data(ide_drive_t *drive,
151 struct request *failed_command,
152 struct request_sense *sense)
154 unsigned long sector;
155 unsigned long bio_sectors;
157 struct cdrom_info *info = drive->driver_data;
159 if (!cdrom_log_sense(drive, failed_command, sense))
163 * If a read toc is executed for a CD-R or CD-RW medium where
164 * the first toc has not been recorded yet, it will fail with
165 * 05/24/00 (which is a confusing error)
167 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168 if (sense->sense_key == 0x05 && sense->asc == 0x24)
171 if (sense->error_code == 0x70) { /* Current Error */
172 switch(sense->sense_key) {
174 case VOLUME_OVERFLOW:
175 case ILLEGAL_REQUEST:
178 if (failed_command == NULL ||
179 !blk_fs_request(failed_command))
181 sector = (sense->information[0] << 24) |
182 (sense->information[1] << 16) |
183 (sense->information[2] << 8) |
184 (sense->information[3]);
186 bio_sectors = bio_sectors(failed_command->bio);
189 if (drive->queue->hardsect_size == 2048)
190 sector <<= 2; /* Device sector size is 2K */
191 sector &= ~(bio_sectors -1);
192 valid = (sector - failed_command->sector) << 9;
196 if (sector < get_capacity(info->disk) &&
197 drive->probed_capacity - sector < 4 * 75) {
198 set_capacity(info->disk, sector);
203 ide_cd_log_error(drive->name, failed_command, sense);
207 * Initialize a ide-cd packet command request
209 static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq)
211 struct cdrom_info *cd = drive->driver_data;
213 ide_init_drive_cmd(rq);
214 rq->cmd_type = REQ_TYPE_ATA_PC;
215 rq->rq_disk = cd->disk;
218 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
219 struct request *failed_command)
221 struct cdrom_info *info = drive->driver_data;
222 struct request *rq = &info->request_sense_request;
225 sense = &info->sense_data;
227 /* stuff the sense request in front of our current request */
228 cdrom_prepare_request(drive, rq);
231 rq->cmd[0] = GPCMD_REQUEST_SENSE;
232 rq->cmd[4] = rq->data_len = 18;
234 rq->cmd_type = REQ_TYPE_SENSE;
236 /* NOTE! Save the failed command in "rq->buffer" */
237 rq->buffer = (void *) failed_command;
239 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
242 static void cdrom_end_request (ide_drive_t *drive, int uptodate)
244 struct request *rq = HWGROUP(drive)->rq;
245 int nsectors = rq->hard_cur_sectors;
247 if (blk_sense_request(rq) && uptodate) {
249 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
252 struct request *failed = (struct request *) rq->buffer;
253 struct cdrom_info *info = drive->driver_data;
254 void *sense = &info->sense_data;
259 sense = failed->sense;
260 failed->sense_len = rq->sense_len;
262 cdrom_analyze_sense_data(drive, failed, sense);
264 * now end failed request
266 if (blk_fs_request(failed)) {
267 if (ide_end_dequeued_request(drive, failed, 0,
268 failed->hard_nr_sectors))
271 spin_lock_irqsave(&ide_lock, flags);
272 if (__blk_end_request(failed, -EIO,
275 spin_unlock_irqrestore(&ide_lock, flags);
278 cdrom_analyze_sense_data(drive, NULL, sense);
281 if (!rq->current_nr_sectors && blk_fs_request(rq))
283 /* make sure it's fully ended */
284 if (blk_pc_request(rq))
285 nsectors = (rq->data_len + 511) >> 9;
289 ide_end_request(drive, uptodate, nsectors);
292 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 stat)
296 ide_dump_status(drive, msg, stat);
299 /* Returns 0 if the request should be continued.
300 Returns 1 if the request was ended. */
301 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
303 struct request *rq = HWGROUP(drive)->rq;
304 int stat, err, sense_key;
306 /* Check for errors. */
307 stat = HWIF(drive)->INB(IDE_STATUS_REG);
311 if (OK_STAT(stat, good_stat, BAD_R_STAT))
314 /* Get the IDE error register. */
315 err = HWIF(drive)->INB(IDE_ERROR_REG);
316 sense_key = err >> 4;
319 printk("%s: missing rq in cdrom_decode_status\n", drive->name);
323 if (blk_sense_request(rq)) {
324 /* We got an error trying to get sense info
325 from the drive (probably while trying
326 to recover from a former error). Just give up. */
328 rq->cmd_flags |= REQ_FAILED;
329 cdrom_end_request(drive, 0);
330 ide_error(drive, "request sense failure", stat);
333 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
334 /* All other functions, except for READ. */
338 * if we have an error, pass back CHECK_CONDITION as the
341 if (blk_pc_request(rq) && !rq->errors)
342 rq->errors = SAM_STAT_CHECK_CONDITION;
344 /* Check for tray open. */
345 if (sense_key == NOT_READY) {
346 cdrom_saw_media_change (drive);
347 } else if (sense_key == UNIT_ATTENTION) {
348 /* Check for media change. */
349 cdrom_saw_media_change (drive);
350 /*printk("%s: media changed\n",drive->name);*/
352 } else if ((sense_key == ILLEGAL_REQUEST) &&
353 (rq->cmd[0] == GPCMD_START_STOP_UNIT)) {
355 * Don't print error message for this condition--
356 * SFF8090i indicates that 5/24/00 is the correct
357 * response to a request to close the tray if the
358 * drive doesn't have that capability.
359 * cdrom_log_sense() knows this!
361 } else if (!(rq->cmd_flags & REQ_QUIET)) {
362 /* Otherwise, print an error. */
363 ide_dump_status(drive, "packet command error", stat);
366 rq->cmd_flags |= REQ_FAILED;
369 * instead of playing games with moving completions around,
370 * remove failed request completely and end it when the
371 * request sense has completed
373 if (stat & ERR_STAT) {
374 spin_lock_irqsave(&ide_lock, flags);
375 blkdev_dequeue_request(rq);
376 HWGROUP(drive)->rq = NULL;
377 spin_unlock_irqrestore(&ide_lock, flags);
379 cdrom_queue_request_sense(drive, rq->sense, rq);
381 cdrom_end_request(drive, 0);
383 } else if (blk_fs_request(rq)) {
384 int do_end_request = 0;
386 /* Handle errors from READ and WRITE requests. */
388 if (blk_noretry_request(rq))
391 if (sense_key == NOT_READY) {
393 if (rq_data_dir(rq) == READ) {
394 cdrom_saw_media_change (drive);
396 /* Fail the request. */
397 printk ("%s: tray open\n", drive->name);
400 struct cdrom_info *info = drive->driver_data;
402 /* allow the drive 5 seconds to recover, some
403 * devices will return this error while flushing
406 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
408 if (time_after(jiffies, info->write_timeout))
414 * take a breather relying on the
415 * unplug timer to kick us again
417 spin_lock_irqsave(&ide_lock, flags);
418 blk_plug_device(drive->queue);
419 spin_unlock_irqrestore(&ide_lock,flags);
423 } else if (sense_key == UNIT_ATTENTION) {
425 cdrom_saw_media_change (drive);
427 /* Arrange to retry the request.
428 But be sure to give up if we've retried
430 if (++rq->errors > ERROR_MAX)
432 } else if (sense_key == ILLEGAL_REQUEST ||
433 sense_key == DATA_PROTECT) {
434 /* No point in retrying after an illegal
435 request or data protect error.*/
436 ide_dump_status_no_sense (drive, "command error", stat);
438 } else if (sense_key == MEDIUM_ERROR) {
439 /* No point in re-trying a zillion times on a bad
440 * sector... If we got here the error is not correctable */
441 ide_dump_status_no_sense (drive, "media error (bad sector)", stat);
443 } else if (sense_key == BLANK_CHECK) {
444 /* Disk appears blank ?? */
445 ide_dump_status_no_sense (drive, "media error (blank)", stat);
447 } else if ((err & ~ABRT_ERR) != 0) {
448 /* Go to the default handler
450 ide_error(drive, "cdrom_decode_status", stat);
452 } else if ((++rq->errors > ERROR_MAX)) {
453 /* We've racked up too many retries. Abort. */
457 /* End a request through request sense analysis when we have
458 sense data. We need this in order to perform end of media
461 if (do_end_request) {
462 if (stat & ERR_STAT) {
464 spin_lock_irqsave(&ide_lock, flags);
465 blkdev_dequeue_request(rq);
466 HWGROUP(drive)->rq = NULL;
467 spin_unlock_irqrestore(&ide_lock, flags);
469 cdrom_queue_request_sense(drive, rq->sense, rq);
471 cdrom_end_request(drive, 0);
473 /* If we got a CHECK_CONDITION status,
474 queue a request sense command. */
476 cdrom_queue_request_sense(drive, NULL, NULL);
479 blk_dump_rq_flags(rq, "ide-cd: bad rq");
480 cdrom_end_request(drive, 0);
483 /* Retry, or handle the next request. */
487 static int cdrom_timer_expiry(ide_drive_t *drive)
489 struct request *rq = HWGROUP(drive)->rq;
490 unsigned long wait = 0;
493 * Some commands are *slow* and normally take a long time to
494 * complete. Usually we can use the ATAPI "disconnect" to bypass
495 * this, but not all commands/drives support that. Let
496 * ide_timer_expiry keep polling us for these.
498 switch (rq->cmd[0]) {
500 case GPCMD_FORMAT_UNIT:
501 case GPCMD_RESERVE_RZONE_TRACK:
502 case GPCMD_CLOSE_TRACK:
503 case GPCMD_FLUSH_CACHE:
504 wait = ATAPI_WAIT_PC;
507 if (!(rq->cmd_flags & REQ_QUIET))
508 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]);
515 /* Set up the device registers for transferring a packet command on DEV,
516 expecting to later transfer XFERLEN bytes. HANDLER is the routine
517 which actually transfers the command to the drive. If this is a
518 drq_interrupt device, this routine will arrange for HANDLER to be
519 called when the interrupt from the drive arrives. Otherwise, HANDLER
520 will be called immediately after the drive is prepared for the transfer. */
522 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
524 ide_handler_t *handler)
526 ide_startstop_t startstop;
527 struct cdrom_info *info = drive->driver_data;
528 ide_hwif_t *hwif = drive->hwif;
530 /* Wait for the controller to be idle. */
531 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
534 /* FIXME: for Virtual DMA we must check harder */
536 info->dma = !hwif->dma_setup(drive);
538 /* Set up the controller registers. */
539 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
540 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
542 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
543 /* waiting for CDB interrupt, not DMA yet. */
545 drive->waiting_for_dma = 0;
548 ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry);
554 spin_lock_irqsave(&ide_lock, flags);
555 hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG);
557 spin_unlock_irqrestore(&ide_lock, flags);
559 return (*handler) (drive);
563 /* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN.
564 The device registers must have already been prepared
565 by cdrom_start_packet_command.
566 HANDLER is the interrupt handler to call when the command completes
567 or there's data ready. */
568 #define ATAPI_MIN_CDB_BYTES 12
569 static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
571 ide_handler_t *handler)
573 ide_hwif_t *hwif = drive->hwif;
575 struct cdrom_info *info = drive->driver_data;
576 ide_startstop_t startstop;
578 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
579 /* Here we should have been called after receiving an interrupt
580 from the device. DRQ should how be set. */
582 /* Check for errors. */
583 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
586 /* Ok, next interrupt will be DMA interrupt. */
588 drive->waiting_for_dma = 1;
590 /* Otherwise, we must wait for DRQ to get set. */
591 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
592 BUSY_STAT, WAIT_READY))
596 /* Arm the interrupt handler. */
597 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
599 /* ATAPI commands get padded out to 12 bytes minimum */
600 cmd_len = COMMAND_SIZE(rq->cmd[0]);
601 if (cmd_len < ATAPI_MIN_CDB_BYTES)
602 cmd_len = ATAPI_MIN_CDB_BYTES;
604 /* Send the command to the device. */
605 HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
607 /* Start the DMA if need be */
609 hwif->dma_start(drive);
614 /****************************************************************************
615 * Block read functions.
618 typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
620 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
624 xf(drive, &dum, sizeof(dum));
630 * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector
631 * buffer. Once the first sector is added, any subsequent sectors are
632 * assumed to be continuous (until the buffer is cleared). For the first
633 * sector added, SECTOR is its sector number. (SECTOR is then ignored until
634 * the buffer is cleared.)
636 static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector,
637 int sectors_to_transfer)
639 struct cdrom_info *info = drive->driver_data;
641 /* Number of sectors to read into the buffer. */
642 int sectors_to_buffer = min_t(int, sectors_to_transfer,
643 (SECTOR_BUFFER_SIZE >> SECTOR_BITS) -
644 info->nsectors_buffered);
648 /* If we couldn't get a buffer, don't try to buffer anything... */
649 if (info->buffer == NULL)
650 sectors_to_buffer = 0;
652 /* If this is the first sector in the buffer, remember its number. */
653 if (info->nsectors_buffered == 0)
654 info->sector_buffered = sector;
656 /* Read the data into the buffer. */
657 dest = info->buffer + info->nsectors_buffered * SECTOR_SIZE;
658 while (sectors_to_buffer > 0) {
659 HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE);
661 --sectors_to_transfer;
662 ++info->nsectors_buffered;
666 /* Throw away any remaining data. */
667 while (sectors_to_transfer > 0) {
668 static char dum[SECTOR_SIZE];
669 HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
670 --sectors_to_transfer;
675 * Check the contents of the interrupt reason register from the cdrom
676 * and attempt to recover if there are problems. Returns 0 if everything's
677 * ok; nonzero if the request has been terminated.
680 int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
684 else if (ireason == 0) {
685 ide_hwif_t *hwif = drive->hwif;
687 /* Whoops... The drive is expecting to receive data from us! */
688 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
689 drive->name, __FUNCTION__);
691 /* Throw some data at the drive so it doesn't hang
692 and quit this request. */
693 ide_cd_pad_transfer(drive, hwif->atapi_output_bytes, len);
694 } else if (ireason == 1) {
695 /* Some drives (ASUS) seem to tell us that status
696 * info is available. just get it and ignore.
698 (void) HWIF(drive)->INB(IDE_STATUS_REG);
701 /* Drive wants a command packet, or invalid ireason... */
702 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
703 drive->name, __FUNCTION__, ireason);
706 cdrom_end_request(drive, 0);
711 * Interrupt routine. Called when a read request has completed.
713 static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
716 int ireason, len, sectors_to_transfer, nskip;
717 struct cdrom_info *info = drive->driver_data;
718 u8 lowcyl = 0, highcyl = 0;
719 int dma = info->dma, dma_error = 0;
721 struct request *rq = HWGROUP(drive)->rq;
728 dma_error = HWIF(drive)->ide_dma_end(drive);
730 printk(KERN_ERR "%s: DMA read error\n", drive->name);
735 if (cdrom_decode_status(drive, 0, &stat))
740 ide_end_request(drive, 1, rq->nr_sectors);
743 return ide_error(drive, "dma error", stat);
746 /* Read the interrupt reason and the transfer length. */
747 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
748 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
749 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
751 len = lowcyl + (256 * highcyl);
753 /* If DRQ is clear, the command has completed. */
754 if ((stat & DRQ_STAT) == 0) {
755 /* If we're not done filling the current buffer, complain.
756 Otherwise, complete the command normally. */
757 if (rq->current_nr_sectors > 0) {
758 printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n",
759 drive->name, rq->current_nr_sectors);
760 rq->cmd_flags |= REQ_FAILED;
761 cdrom_end_request(drive, 0);
763 cdrom_end_request(drive, 1);
767 /* Check that the drive is expecting to do the same thing we are. */
768 if (cdrom_read_check_ireason (drive, len, ireason))
771 /* Assume that the drive will always provide data in multiples
772 of at least SECTOR_SIZE, as it gets hairy to keep track
773 of the transfers otherwise. */
774 if ((len % SECTOR_SIZE) != 0) {
775 printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",
777 if (info->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
778 printk (KERN_ERR " This drive is not supported by this version of the driver\n");
780 printk (KERN_ERR " Trying to limit transfer sizes\n");
781 info->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
783 cdrom_end_request(drive, 0);
787 /* The number of sectors we need to read from the drive. */
788 sectors_to_transfer = len / SECTOR_SIZE;
790 /* First, figure out if we need to bit-bucket
791 any of the leading sectors. */
792 nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer);
795 /* We need to throw away a sector. */
796 static char dum[SECTOR_SIZE];
797 HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
799 --rq->current_nr_sectors;
801 --sectors_to_transfer;
804 /* Now loop while we still have data to read from the drive. */
805 while (sectors_to_transfer > 0) {
808 /* If we've filled the present buffer but there's another
809 chained buffer after it, move on. */
810 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
811 cdrom_end_request(drive, 1);
813 /* If the buffers are full, cache the rest of the data in our
815 if (rq->current_nr_sectors == 0) {
816 cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer);
817 sectors_to_transfer = 0;
819 /* Transfer data to the buffers.
820 Figure out how many sectors we can transfer
821 to the current buffer. */
822 this_transfer = min_t(int, sectors_to_transfer,
823 rq->current_nr_sectors);
825 /* Read this_transfer sectors
826 into the current buffer. */
827 while (this_transfer > 0) {
828 HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE);
829 rq->buffer += SECTOR_SIZE;
831 --rq->current_nr_sectors;
834 --sectors_to_transfer;
839 /* Done moving data! Wait for another interrupt. */
840 ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL);
845 * Try to satisfy some of the current read request from our cached data.
846 * Returns nonzero if the request has been completed, zero otherwise.
848 static int cdrom_read_from_buffer (ide_drive_t *drive)
850 struct cdrom_info *info = drive->driver_data;
851 struct request *rq = HWGROUP(drive)->rq;
852 unsigned short sectors_per_frame;
854 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
856 /* Can't do anything if there's no buffer. */
857 if (info->buffer == NULL) return 0;
859 /* Loop while this request needs data and the next block is present
861 while (rq->nr_sectors > 0 &&
862 rq->sector >= info->sector_buffered &&
863 rq->sector < info->sector_buffered + info->nsectors_buffered) {
864 if (rq->current_nr_sectors == 0)
865 cdrom_end_request(drive, 1);
869 (rq->sector - info->sector_buffered) * SECTOR_SIZE,
871 rq->buffer += SECTOR_SIZE;
872 --rq->current_nr_sectors;
877 /* If we've satisfied the current request,
878 terminate it successfully. */
879 if (rq->nr_sectors == 0) {
880 cdrom_end_request(drive, 1);
884 /* Move on to the next buffer if needed. */
885 if (rq->current_nr_sectors == 0)
886 cdrom_end_request(drive, 1);
888 /* If this condition does not hold, then the kluge i use to
889 represent the number of sectors to skip at the start of a transfer
890 will fail. I think that this will never happen, but let's be
891 paranoid and check. */
892 if (rq->current_nr_sectors < bio_cur_sectors(rq->bio) &&
893 (rq->sector & (sectors_per_frame - 1))) {
894 printk(KERN_ERR "%s: cdrom_read_from_buffer: buffer botch (%ld)\n",
895 drive->name, (long)rq->sector);
896 cdrom_end_request(drive, 0);
904 * Routine to send a read packet command to the drive.
905 * This is usually called directly from cdrom_start_read.
906 * However, for drq_interrupt devices, it is called from an interrupt
907 * when the drive is ready to accept the command.
909 static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
911 struct request *rq = HWGROUP(drive)->rq;
912 unsigned short sectors_per_frame;
915 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
917 /* If the requested sector doesn't start on a cdrom block boundary,
918 we must adjust the start of the transfer so that it does,
919 and remember to skip the first few sectors.
920 If the CURRENT_NR_SECTORS field is larger than the size
921 of the buffer, it will mean that we're to skip a number
922 of sectors equal to the amount by which CURRENT_NR_SECTORS
923 is larger than the buffer size. */
924 nskip = rq->sector & (sectors_per_frame - 1);
926 /* Sanity check... */
927 if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) &&
928 (rq->sector & (sectors_per_frame - 1))) {
929 printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n",
930 drive->name, rq->current_nr_sectors);
931 cdrom_end_request(drive, 0);
934 rq->current_nr_sectors += nskip;
937 /* Set up the command */
938 rq->timeout = ATAPI_WAIT_PC;
940 /* Send the command to the drive and return. */
941 return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr);
945 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
946 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
947 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
949 static ide_startstop_t cdrom_seek_intr (ide_drive_t *drive)
951 struct cdrom_info *info = drive->driver_data;
953 static int retry = 10;
955 if (cdrom_decode_status(drive, 0, &stat))
958 info->cd_flags |= IDE_CD_FLAG_SEEKING;
960 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
963 * this condition is far too common, to bother
966 /* printk("%s: disabled DSC seek overlap\n", drive->name);*/
967 drive->dsc_overlap = 0;
973 static ide_startstop_t cdrom_start_seek_continuation (ide_drive_t *drive)
975 struct request *rq = HWGROUP(drive)->rq;
976 sector_t frame = rq->sector;
978 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
980 memset(rq->cmd, 0, sizeof(rq->cmd));
981 rq->cmd[0] = GPCMD_SEEK;
982 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
984 rq->timeout = ATAPI_WAIT_PC;
985 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
988 static ide_startstop_t cdrom_start_seek (ide_drive_t *drive, unsigned int block)
990 struct cdrom_info *info = drive->driver_data;
993 info->start_seek = jiffies;
994 return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation);
997 /* Fix up a possibly partially-processed request so that we can
998 start it over entirely, or even put it back on the request queue. */
999 static void restore_request (struct request *rq)
1001 if (rq->buffer != bio_data(rq->bio)) {
1002 sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE;
1004 rq->buffer = bio_data(rq->bio);
1005 rq->nr_sectors += n;
1008 rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio);
1009 rq->hard_nr_sectors = rq->nr_sectors;
1010 rq->hard_sector = rq->sector;
1011 rq->q->prep_rq_fn(rq->q, rq);
1015 * Start a read request from the CD-ROM.
1017 static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
1019 struct cdrom_info *info = drive->driver_data;
1020 struct request *rq = HWGROUP(drive)->rq;
1021 unsigned short sectors_per_frame;
1023 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1025 /* We may be retrying this request after an error. Fix up
1026 any weirdness which might be present in the request packet. */
1027 restore_request(rq);
1029 /* Satisfy whatever we can of this request from our cached sector. */
1030 if (cdrom_read_from_buffer(drive))
1033 /* Clear the local sector buffer. */
1034 info->nsectors_buffered = 0;
1036 /* use dma, if possible. */
1037 info->dma = drive->using_dma;
1038 if ((rq->sector & (sectors_per_frame - 1)) ||
1039 (rq->nr_sectors & (sectors_per_frame - 1)))
1042 /* Start sending the read request to the drive. */
1043 return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation);
1046 /****************************************************************************
1047 * Execute all other packet commands.
1050 /* Interrupt routine for packet command completion. */
1051 static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
1053 struct request *rq = HWGROUP(drive)->rq;
1054 xfer_func_t *xferfunc = NULL;
1055 int stat, ireason, len, thislen, write;
1056 u8 lowcyl = 0, highcyl = 0;
1058 /* Check for errors. */
1059 if (cdrom_decode_status(drive, 0, &stat))
1062 /* Read the interrupt reason and the transfer length. */
1063 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1064 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1065 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1067 len = lowcyl + (256 * highcyl);
1069 /* If DRQ is clear, the command has completed.
1070 Complain if we still have data left to transfer. */
1071 if ((stat & DRQ_STAT) == 0) {
1072 /* Some of the trailing request sense fields are optional, and
1073 some drives don't send them. Sigh. */
1074 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
1076 rq->data_len <= 5) {
1077 while (rq->data_len > 0) {
1078 *(unsigned char *)rq->data++ = 0;
1083 if (rq->data_len == 0)
1084 cdrom_end_request(drive, 1);
1086 rq->cmd_flags |= REQ_FAILED;
1087 cdrom_end_request(drive, 0);
1092 /* Figure out how much data to transfer. */
1093 thislen = rq->data_len;
1099 xferfunc = HWIF(drive)->atapi_output_bytes;
1100 } else if (ireason == 2) {
1102 xferfunc = HWIF(drive)->atapi_input_bytes;
1107 printk(KERN_ERR "%s: confused, missing data\n",
1109 blk_dump_rq_flags(rq, write ? "cdrom_pc_intr, write"
1110 : "cdrom_pc_intr, read");
1113 /* Transfer the data. */
1114 xferfunc(drive, rq->data, thislen);
1116 /* Keep count of how much data we've moved. */
1118 rq->data += thislen;
1119 rq->data_len -= thislen;
1121 if (write && blk_sense_request(rq))
1122 rq->sense_len += thislen;
1124 printk (KERN_ERR "%s: cdrom_pc_intr: The drive "
1125 "appears confused (ireason = 0x%02x). "
1126 "Trying to recover by ending request.\n",
1127 drive->name, ireason);
1128 rq->cmd_flags |= REQ_FAILED;
1129 cdrom_end_request(drive, 0);
1134 * If we haven't moved enough data to satisfy the drive,
1138 ide_cd_pad_transfer(drive, xferfunc, len);
1140 /* Now we wait for another interrupt. */
1141 ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry);
1145 static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive)
1147 struct request *rq = HWGROUP(drive)->rq;
1150 rq->timeout = ATAPI_WAIT_PC;
1152 /* Send the command to the drive and return. */
1153 return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr);
1157 static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive)
1160 struct request *rq = HWGROUP(drive)->rq;
1161 struct cdrom_info *info = drive->driver_data;
1164 rq->cmd_flags &= ~REQ_FAILED;
1167 /* Start sending the command to the drive. */
1168 return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation);
1172 static int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
1174 struct request_sense sense;
1176 unsigned int flags = rq->cmd_flags;
1178 if (rq->sense == NULL)
1181 /* Start of retry loop. */
1184 unsigned long time = jiffies;
1185 rq->cmd_flags = flags;
1187 error = ide_do_drive_cmd(drive, rq, ide_wait);
1188 time = jiffies - time;
1190 /* FIXME: we should probably abort/retry or something
1191 * in case of failure */
1192 if (rq->cmd_flags & REQ_FAILED) {
1193 /* The request failed. Retry if it was due to a unit
1195 (usually means media was changed). */
1196 struct request_sense *reqbuf = rq->sense;
1198 if (reqbuf->sense_key == UNIT_ATTENTION)
1199 cdrom_saw_media_change(drive);
1200 else if (reqbuf->sense_key == NOT_READY &&
1201 reqbuf->asc == 4 && reqbuf->ascq != 4) {
1202 /* The drive is in the process of loading
1203 a disk. Retry, but wait a little to give
1204 the drive time to complete the load. */
1207 /* Otherwise, don't retry. */
1213 /* End of retry loop. */
1214 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
1216 /* Return an error if the command failed. */
1217 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
1223 static int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
1225 /* Two notes about IDE interrupt reason here - 0 means that
1226 * the drive wants to receive data from us, 2 means that
1227 * the drive is expecting to transfer data to us.
1231 else if (ireason == 2) {
1232 ide_hwif_t *hwif = drive->hwif;
1234 /* Whoops... The drive wants to send data. */
1235 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
1236 drive->name, __FUNCTION__);
1238 ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len);
1240 /* Drive wants a command packet, or invalid ireason... */
1241 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
1242 drive->name, __FUNCTION__, ireason);
1245 cdrom_end_request(drive, 0);
1250 * Called from blk_end_request_callback() after the data of the request
1251 * is completed and before the request is completed.
1252 * By returning value '1', blk_end_request_callback() returns immediately
1253 * without completing the request.
1255 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
1261 * best way to deal with dma that is not sector aligned right now... note
1262 * that in this path we are not using ->data or ->buffer at all. this irs
1263 * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the
1266 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
1268 struct cdrom_info *info = drive->driver_data;
1269 struct request *rq = HWGROUP(drive)->rq;
1270 int dma_error, dma, stat, ireason, len, thislen;
1272 xfer_func_t *xferfunc;
1273 unsigned long flags;
1275 /* Check for errors. */
1280 dma_error = HWIF(drive)->ide_dma_end(drive);
1282 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
1283 rq_data_dir(rq) ? "write" : "read");
1288 if (cdrom_decode_status(drive, 0, &stat))
1292 * using dma, transfer is complete now
1296 return ide_error(drive, "dma error", stat);
1298 spin_lock_irqsave(&ide_lock, flags);
1299 if (__blk_end_request(rq, 0, rq->data_len))
1301 HWGROUP(drive)->rq = NULL;
1302 spin_unlock_irqrestore(&ide_lock, flags);
1308 * ok we fall to pio :/
1310 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1311 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1312 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1314 len = lowcyl + (256 * highcyl);
1315 thislen = rq->data_len;
1320 * If DRQ is clear, the command has completed.
1322 if ((stat & DRQ_STAT) == 0) {
1323 spin_lock_irqsave(&ide_lock, flags);
1324 if (__blk_end_request(rq, 0, rq->data_len))
1326 HWGROUP(drive)->rq = NULL;
1327 spin_unlock_irqrestore(&ide_lock, flags);
1333 * check which way to transfer data
1335 if (rq_data_dir(rq) == WRITE) {
1339 if (cdrom_write_check_ireason(drive, len, ireason))
1342 xferfunc = HWIF(drive)->atapi_output_bytes;
1347 if (cdrom_read_check_ireason(drive, len, ireason))
1350 xferfunc = HWIF(drive)->atapi_input_bytes;
1356 while (thislen > 0) {
1357 int blen = blen = rq->data_len;
1358 char *ptr = rq->data;
1364 ptr = bio_data(rq->bio);
1365 blen = bio_iovec(rq->bio)->bv_len;
1369 printk(KERN_ERR "%s: confused, missing data\n", drive->name);
1376 xferfunc(drive, ptr, blen);
1380 rq->data_len -= blen;
1384 * The request can't be completed until DRQ is cleared.
1385 * So complete the data, but don't complete the request
1386 * using the dummy function for the callback feature
1387 * of blk_end_request_callback().
1389 blk_end_request_callback(rq, 0, blen,
1390 cdrom_newpc_intr_dummy_cb);
1399 ide_cd_pad_transfer(drive, xferfunc, len);
1401 BUG_ON(HWGROUP(drive)->handler != NULL);
1403 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
1407 static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
1409 int stat, ireason, len, sectors_to_transfer, uptodate;
1410 struct cdrom_info *info = drive->driver_data;
1411 int dma_error = 0, dma = info->dma;
1412 u8 lowcyl = 0, highcyl = 0;
1414 struct request *rq = HWGROUP(drive)->rq;
1416 /* Check for errors. */
1419 dma_error = HWIF(drive)->ide_dma_end(drive);
1421 printk(KERN_ERR "%s: DMA write error\n", drive->name);
1426 if (cdrom_decode_status(drive, 0, &stat))
1430 * using dma, transfer is complete now
1434 return ide_error(drive, "dma error", stat);
1436 ide_end_request(drive, 1, rq->nr_sectors);
1440 /* Read the interrupt reason and the transfer length. */
1441 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1442 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1443 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1445 len = lowcyl + (256 * highcyl);
1447 /* If DRQ is clear, the command has completed. */
1448 if ((stat & DRQ_STAT) == 0) {
1449 /* If we're not done writing, complain.
1450 * Otherwise, complete the command normally.
1453 if (rq->current_nr_sectors > 0) {
1454 printk(KERN_ERR "%s: %s: data underrun (%d blocks)\n",
1455 drive->name, __FUNCTION__,
1456 rq->current_nr_sectors);
1459 cdrom_end_request(drive, uptodate);
1463 /* Check that the drive is expecting to do the same thing we are. */
1464 if (cdrom_write_check_ireason(drive, len, ireason))
1467 sectors_to_transfer = len / SECTOR_SIZE;
1470 * now loop and write out the data
1472 while (sectors_to_transfer > 0) {
1475 if (!rq->current_nr_sectors) {
1476 printk(KERN_ERR "%s: %s: confused, missing data\n",
1477 drive->name, __FUNCTION__);
1482 * Figure out how many sectors we can transfer
1484 this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors);
1486 while (this_transfer > 0) {
1487 HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
1488 rq->buffer += SECTOR_SIZE;
1490 --rq->current_nr_sectors;
1493 --sectors_to_transfer;
1497 * current buffer complete, move on
1499 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1500 cdrom_end_request(drive, 1);
1503 /* re-arm handler */
1504 ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL);
1508 static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
1510 struct request *rq = HWGROUP(drive)->rq;
1512 #if 0 /* the immediate bit */
1513 rq->cmd[1] = 1 << 3;
1515 rq->timeout = ATAPI_WAIT_PC;
1517 return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
1520 static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
1522 struct cdrom_info *info = drive->driver_data;
1523 struct gendisk *g = info->disk;
1524 unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1527 * writes *must* be hardware frame aligned
1529 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1530 (rq->sector & (sectors_per_frame - 1))) {
1531 cdrom_end_request(drive, 0);
1536 * disk has become write protected
1539 cdrom_end_request(drive, 0);
1543 info->nsectors_buffered = 0;
1545 /* use dma, if possible. we don't need to check more, since we
1546 * know that the transfer is always (at least!) frame aligned */
1547 info->dma = drive->using_dma ? 1 : 0;
1549 info->devinfo.media_written = 1;
1551 /* Start sending the write request to the drive. */
1552 return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
1555 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1557 struct request *rq = HWGROUP(drive)->rq;
1560 rq->timeout = ATAPI_WAIT_PC;
1562 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1565 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1567 struct cdrom_info *info = drive->driver_data;
1569 rq->cmd_flags |= REQ_QUIET;
1577 int mask = drive->queue->dma_alignment;
1578 unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
1580 info->dma = drive->using_dma;
1583 * check if dma is safe
1585 * NOTE! The "len" and "addr" checks should possibly have
1588 if ((rq->data_len & 15) || (addr & mask))
1592 /* Start sending the command to the drive. */
1593 return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
1596 /****************************************************************************
1597 * cdrom driver request routine.
1599 static ide_startstop_t
1600 ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
1602 ide_startstop_t action;
1603 struct cdrom_info *info = drive->driver_data;
1605 if (blk_fs_request(rq)) {
1606 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1607 unsigned long elapsed = jiffies - info->start_seek;
1608 int stat = HWIF(drive)->INB(IDE_STATUS_REG);
1610 if ((stat & SEEK_STAT) != SEEK_STAT) {
1611 if (elapsed < IDECD_SEEK_TIMEOUT) {
1612 ide_stall_queue(drive, IDECD_SEEK_TIMER);
1615 printk (KERN_ERR "%s: DSC timeout\n", drive->name);
1617 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1619 if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) {
1620 action = cdrom_start_seek(drive, block);
1622 if (rq_data_dir(rq) == READ)
1623 action = cdrom_start_read(drive, block);
1625 action = cdrom_start_write(drive, rq);
1627 info->last_block = block;
1629 } else if (rq->cmd_type == REQ_TYPE_SENSE ||
1630 rq->cmd_type == REQ_TYPE_ATA_PC) {
1631 return cdrom_do_packet_command(drive);
1632 } else if (blk_pc_request(rq)) {
1633 return cdrom_do_block_pc(drive, rq);
1634 } else if (blk_special_request(rq)) {
1636 * right now this can only be a reset...
1638 cdrom_end_request(drive, 1);
1642 blk_dump_rq_flags(rq, "ide-cd bad flags");
1643 cdrom_end_request(drive, 0);
1649 /****************************************************************************
1652 * Routines which queue packet commands take as a final argument a pointer
1653 * to a request_sense struct. If execution of the command results
1654 * in an error with a CHECK CONDITION status, this structure will be filled
1655 * with the results of the subsequent request sense command. The pointer
1656 * can also be NULL, in which case no sense information is returned.
1660 void msf_from_bcd (struct atapi_msf *msf)
1662 msf->minute = BCD2BIN(msf->minute);
1663 msf->second = BCD2BIN(msf->second);
1664 msf->frame = BCD2BIN(msf->frame);
1668 void lba_to_msf (int lba, byte *m, byte *s, byte *f)
1670 lba += CD_MSF_OFFSET;
1671 lba &= 0xffffff; /* negative lbas use only 24 bits */
1672 *m = lba / (CD_SECS * CD_FRAMES);
1673 lba %= (CD_SECS * CD_FRAMES);
1674 *s = lba / CD_FRAMES;
1675 *f = lba % CD_FRAMES;
1680 int msf_to_lba (byte m, byte s, byte f)
1682 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
1685 static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1688 struct cdrom_info *info = drive->driver_data;
1689 struct cdrom_device_info *cdi = &info->devinfo;
1691 cdrom_prepare_request(drive, &req);
1694 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1695 req.cmd_flags |= REQ_QUIET;
1698 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to
1699 * switch CDs instead of supporting the LOAD_UNLOAD opcode.
1701 req.cmd[7] = cdi->sanyo_slot % 3;
1703 return cdrom_queue_packet_command(drive, &req);
1707 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
1709 cdrom_lockdoor(ide_drive_t *drive, int lockflag, struct request_sense *sense)
1711 struct cdrom_info *cd = drive->driver_data;
1712 struct request_sense my_sense;
1719 /* If the drive cannot lock the door, just pretend. */
1720 if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
1723 cdrom_prepare_request(drive, &req);
1725 req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
1726 req.cmd[4] = lockflag ? 1 : 0;
1727 stat = cdrom_queue_packet_command(drive, &req);
1730 /* If we got an illegal field error, the drive
1731 probably cannot lock the door. */
1733 sense->sense_key == ILLEGAL_REQUEST &&
1734 (sense->asc == 0x24 || sense->asc == 0x20)) {
1735 printk (KERN_ERR "%s: door locking not supported\n",
1737 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1741 /* no medium, that's alright. */
1742 if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
1747 cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
1749 cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
1756 /* Eject the disk if EJECTFLAG is 0.
1757 If EJECTFLAG is 1, try to reload the disk. */
1758 static int cdrom_eject(ide_drive_t *drive, int ejectflag,
1759 struct request_sense *sense)
1761 struct cdrom_info *cd = drive->driver_data;
1762 struct cdrom_device_info *cdi = &cd->devinfo;
1766 if ((cd->cd_flags & IDE_CD_FLAG_NO_EJECT) && !ejectflag)
1767 return -EDRIVE_CANT_DO_THIS;
1769 /* reload fails on some drives, if the tray is locked */
1770 if ((cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED) && ejectflag)
1773 cdrom_prepare_request(drive, &req);
1775 /* only tell drive to close tray if open, if it can do that */
1776 if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
1780 req.cmd[0] = GPCMD_START_STOP_UNIT;
1781 req.cmd[4] = loej | (ejectflag != 0);
1782 return cdrom_queue_packet_command(drive, &req);
1785 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1786 unsigned long *sectors_per_frame,
1787 struct request_sense *sense)
1797 cdrom_prepare_request(drive, &req);
1800 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1801 req.data = (char *)&capbuf;
1802 req.data_len = sizeof(capbuf);
1803 req.cmd_flags |= REQ_QUIET;
1805 stat = cdrom_queue_packet_command(drive, &req);
1807 *capacity = 1 + be32_to_cpu(capbuf.lba);
1808 *sectors_per_frame =
1809 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1815 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1816 int format, char *buf, int buflen,
1817 struct request_sense *sense)
1821 cdrom_prepare_request(drive, &req);
1825 req.data_len = buflen;
1826 req.cmd_flags |= REQ_QUIET;
1827 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1828 req.cmd[6] = trackno;
1829 req.cmd[7] = (buflen >> 8);
1830 req.cmd[8] = (buflen & 0xff);
1831 req.cmd[9] = (format << 6);
1836 return cdrom_queue_packet_command(drive, &req);
1840 /* Try to read the entire TOC for the disk into our internal buffer. */
1841 static int cdrom_read_toc(ide_drive_t *drive, struct request_sense *sense)
1843 int stat, ntracks, i;
1844 struct cdrom_info *info = drive->driver_data;
1845 struct cdrom_device_info *cdi = &info->devinfo;
1846 struct atapi_toc *toc = info->toc;
1848 struct atapi_toc_header hdr;
1849 struct atapi_toc_entry ent;
1852 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1855 /* Try to allocate space. */
1856 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1858 printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
1864 /* Check to see if the existing data is still valid.
1865 If it is, just return. */
1866 (void) cdrom_check_status(drive, sense);
1868 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1871 /* Try to get the total cdrom capacity and sector size. */
1872 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
1875 toc->capacity = 0x1fffff;
1877 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1878 /* Save a private copy of te TOC capacity for error handling */
1879 drive->probed_capacity = toc->capacity * sectors_per_frame;
1881 blk_queue_hardsect_size(drive->queue,
1882 sectors_per_frame << SECTOR_BITS);
1884 /* First read just the header, so we know how long the TOC is. */
1885 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1886 sizeof(struct atapi_toc_header), sense);
1890 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1891 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1892 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1895 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1898 if (ntracks > MAX_TRACKS)
1899 ntracks = MAX_TRACKS;
1901 /* Now read the whole schmeer. */
1902 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1904 sizeof(struct atapi_toc_header) +
1906 sizeof(struct atapi_toc_entry), sense);
1908 if (stat && toc->hdr.first_track > 1) {
1909 /* Cds with CDI tracks only don't have any TOC entries,
1910 despite of this the returned values are
1911 first_track == last_track = number of CDI tracks + 1,
1912 so that this case is indistinguishable from the same
1913 layout plus an additional audio track.
1914 If we get an error for the regular case, we assume
1915 a CDI without additional audio tracks. In this case
1916 the readable TOC is empty (CDI tracks are not included)
1917 and only holds the Leadout entry. Heiko Eißfeldt */
1919 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1921 sizeof(struct atapi_toc_header) +
1923 sizeof(struct atapi_toc_entry),
1928 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1929 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1930 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1932 toc->hdr.first_track = CDROM_LEADOUT;
1933 toc->hdr.last_track = CDROM_LEADOUT;
1940 toc->hdr.toc_length = ntohs (toc->hdr.toc_length);
1942 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1943 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1944 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1947 for (i = 0; i <= ntracks; i++) {
1948 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1949 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1950 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1951 msf_from_bcd(&toc->ent[i].addr.msf);
1953 toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute,
1954 toc->ent[i].addr.msf.second,
1955 toc->ent[i].addr.msf.frame);
1958 /* Read the multisession information. */
1959 if (toc->hdr.first_track != CDROM_LEADOUT) {
1960 /* Read the multisession information. */
1961 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1962 sizeof(ms_tmp), sense);
1966 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1968 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
1969 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1972 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1973 /* Re-read multisession information using MSF format */
1974 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1975 sizeof(ms_tmp), sense);
1979 msf_from_bcd (&ms_tmp.ent.addr.msf);
1980 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1981 ms_tmp.ent.addr.msf.second,
1982 ms_tmp.ent.addr.msf.frame);
1985 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1987 /* Now try to get the total cdrom capacity. */
1988 stat = cdrom_get_last_written(cdi, &last_written);
1989 if (!stat && (last_written > toc->capacity)) {
1990 toc->capacity = last_written;
1991 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1992 drive->probed_capacity = toc->capacity * sectors_per_frame;
1995 /* Remember that we've read this stuff. */
1996 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
2001 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
2003 struct cdrom_info *cd = drive->driver_data;
2004 struct cdrom_tochdr *tochdr = arg;
2005 struct atapi_toc *toc;
2008 /* Make sure our saved TOC is valid. */
2009 stat = cdrom_read_toc(drive, NULL);
2014 tochdr->cdth_trk0 = toc->hdr.first_track;
2015 tochdr->cdth_trk1 = toc->hdr.last_track;
2020 static int cdrom_read_subchannel(ide_drive_t *drive, int format, char *buf,
2021 int buflen, struct request_sense *sense)
2025 cdrom_prepare_request(drive, &req);
2029 req.data_len = buflen;
2030 req.cmd[0] = GPCMD_READ_SUBCHANNEL;
2031 req.cmd[1] = 2; /* MSF addressing */
2032 req.cmd[2] = 0x40; /* request subQ data */
2033 req.cmd[3] = format;
2034 req.cmd[7] = (buflen >> 8);
2035 req.cmd[8] = (buflen & 0xff);
2036 return cdrom_queue_packet_command(drive, &req);
2039 /* ATAPI cdrom drives are free to select the speed you request or any slower
2040 rate :-( Requesting too fast a speed will _not_ produce an error. */
2041 static int cdrom_select_speed(ide_drive_t *drive, int speed,
2042 struct request_sense *sense)
2044 struct cdrom_info *cd = drive->driver_data;
2045 struct cdrom_device_info *cdi = &cd->devinfo;
2047 cdrom_prepare_request(drive, &req);
2051 speed = 0xffff; /* set to max */
2053 speed *= 177; /* Nx to kbytes/s */
2055 req.cmd[0] = GPCMD_SET_SPEED;
2056 /* Read Drive speed in kbytes/second MSB */
2057 req.cmd[2] = (speed >> 8) & 0xff;
2058 /* Read Drive speed in kbytes/second LSB */
2059 req.cmd[3] = speed & 0xff;
2060 if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
2061 (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
2062 /* Write Drive speed in kbytes/second MSB */
2063 req.cmd[4] = (speed >> 8) & 0xff;
2064 /* Write Drive speed in kbytes/second LSB */
2065 req.cmd[5] = speed & 0xff;
2068 return cdrom_queue_packet_command(drive, &req);
2071 static int cdrom_get_toc_entry(ide_drive_t *drive, int track,
2072 struct atapi_toc_entry **ent)
2074 struct cdrom_info *info = drive->driver_data;
2075 struct atapi_toc *toc = info->toc;
2079 * don't serve cached data, if the toc isn't valid
2081 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
2084 /* Check validity of requested track number. */
2085 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
2086 if (toc->hdr.first_track == CDROM_LEADOUT) ntracks = 0;
2087 if (track == CDROM_LEADOUT)
2088 *ent = &toc->ent[ntracks];
2089 else if (track < toc->hdr.first_track ||
2090 track > toc->hdr.last_track)
2093 *ent = &toc->ent[track - toc->hdr.first_track];
2098 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
2100 struct cdrom_tocentry *tocentry = arg;
2101 struct atapi_toc_entry *toce;
2104 stat = cdrom_get_toc_entry(drive, tocentry->cdte_track, &toce);
2108 tocentry->cdte_ctrl = toce->control;
2109 tocentry->cdte_adr = toce->adr;
2110 if (tocentry->cdte_format == CDROM_MSF) {
2111 lba_to_msf(toce->addr.lba,
2112 &tocentry->cdte_addr.msf.minute,
2113 &tocentry->cdte_addr.msf.second,
2114 &tocentry->cdte_addr.msf.frame);
2116 tocentry->cdte_addr.lba = toce->addr.lba;
2121 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
2123 struct cdrom_ti *ti = arg;
2124 struct atapi_toc_entry *first_toc, *last_toc;
2125 unsigned long lba_start, lba_end;
2128 struct request_sense sense;
2130 stat = cdrom_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
2134 stat = cdrom_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
2138 if (ti->cdti_trk1 != CDROM_LEADOUT)
2140 lba_start = first_toc->addr.lba;
2141 lba_end = last_toc->addr.lba;
2143 if (lba_end <= lba_start)
2146 cdrom_prepare_request(drive, &rq);
2149 rq.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2150 lba_to_msf(lba_start, &rq.cmd[3], &rq.cmd[4], &rq.cmd[5]);
2151 lba_to_msf(lba_end - 1, &rq.cmd[6], &rq.cmd[7], &rq.cmd[8]);
2153 return cdrom_queue_packet_command(drive, &rq);
2156 /* the generic packet interface to cdrom.c */
2157 static int ide_cdrom_packet(struct cdrom_device_info *cdi,
2158 struct packet_command *cgc)
2161 ide_drive_t *drive = cdi->handle;
2163 if (cgc->timeout <= 0)
2164 cgc->timeout = ATAPI_WAIT_PC;
2166 /* here we queue the commands from the uniform CD-ROM
2167 layer. the packet must be complete, as we do not
2169 cdrom_prepare_request(drive, &req);
2170 memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
2172 memset(cgc->sense, 0, sizeof(struct request_sense));
2173 req.data = cgc->buffer;
2174 req.data_len = cgc->buflen;
2175 req.timeout = cgc->timeout;
2178 req.cmd_flags |= REQ_QUIET;
2180 req.sense = cgc->sense;
2181 cgc->stat = cdrom_queue_packet_command(drive, &req);
2183 cgc->buflen -= req.data_len;
2187 static int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
2188 unsigned int cmd, void *arg)
2190 ide_drive_t *drive = cdi->handle;
2194 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
2195 * atapi doesn't support it
2197 case CDROMPLAYTRKIND:
2198 return ide_cd_fake_play_trkind(drive, arg);
2199 case CDROMREADTOCHDR:
2200 return ide_cd_read_tochdr(drive, arg);
2201 case CDROMREADTOCENTRY:
2202 return ide_cd_read_tocentry(drive, arg);
2209 int ide_cdrom_reset (struct cdrom_device_info *cdi)
2211 ide_drive_t *drive = cdi->handle;
2212 struct cdrom_info *cd = drive->driver_data;
2213 struct request_sense sense;
2217 cdrom_prepare_request(drive, &req);
2218 req.cmd_type = REQ_TYPE_SPECIAL;
2219 req.cmd_flags = REQ_QUIET;
2220 ret = ide_do_drive_cmd(drive, &req, ide_wait);
2223 * A reset will unlock the door. If it was previously locked,
2226 if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
2227 (void) cdrom_lockdoor(drive, 1, &sense);
2234 int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position)
2236 ide_drive_t *drive = cdi->handle;
2237 struct request_sense sense;
2240 int stat = cdrom_lockdoor(drive, 0, &sense);
2245 return cdrom_eject(drive, !position, &sense);
2249 int ide_cdrom_lock_door (struct cdrom_device_info *cdi, int lock)
2251 ide_drive_t *drive = cdi->handle;
2252 return cdrom_lockdoor(drive, lock, NULL);
2255 static int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
2257 struct cdrom_info *info = drive->driver_data;
2258 struct cdrom_device_info *cdi = &info->devinfo;
2259 struct packet_command cgc;
2260 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
2262 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
2263 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
2265 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
2266 do { /* we seem to get stat=0x01,err=0x00 the first time (??) */
2267 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
2270 } while (--attempts);
2274 static void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
2276 struct cdrom_info *cd = drive->driver_data;
2277 u16 curspeed, maxspeed;
2279 curspeed = *(u16 *)&buf[8 + 14];
2280 maxspeed = *(u16 *)&buf[8 + 8];
2282 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
2283 curspeed = le16_to_cpu(curspeed);
2284 maxspeed = le16_to_cpu(maxspeed);
2286 curspeed = be16_to_cpu(curspeed);
2287 maxspeed = be16_to_cpu(maxspeed);
2290 cd->current_speed = (curspeed + (176/2)) / 176;
2291 cd->max_speed = (maxspeed + (176/2)) / 176;
2295 int ide_cdrom_select_speed (struct cdrom_device_info *cdi, int speed)
2297 ide_drive_t *drive = cdi->handle;
2298 struct cdrom_info *cd = drive->driver_data;
2299 struct request_sense sense;
2300 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
2303 if ((stat = cdrom_select_speed(drive, speed, &sense)) < 0)
2306 if (!ide_cdrom_get_capabilities(drive, buf)) {
2307 ide_cdrom_update_speed(drive, buf);
2308 cdi->speed = cd->current_speed;
2314 * add logic to try GET_EVENT command first to check for media and tray
2315 * status. this should be supported by newer cd-r/w and all DVD etc
2319 int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
2321 ide_drive_t *drive = cdi->handle;
2322 struct media_event_desc med;
2323 struct request_sense sense;
2326 if (slot_nr != CDSL_CURRENT)
2329 stat = cdrom_check_status(drive, &sense);
2330 if (!stat || sense.sense_key == UNIT_ATTENTION)
2333 if (!cdrom_get_media_event(cdi, &med)) {
2334 if (med.media_present)
2336 else if (med.door_open)
2337 return CDS_TRAY_OPEN;
2342 if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04)
2346 * If not using Mt Fuji extended media tray reports,
2347 * just return TRAY_OPEN since ATAPI doesn't provide
2348 * any other way to detect this...
2350 if (sense.sense_key == NOT_READY) {
2351 if (sense.asc == 0x3a && sense.ascq == 1)
2354 return CDS_TRAY_OPEN;
2356 return CDS_DRIVE_NOT_READY;
2360 int ide_cdrom_get_last_session (struct cdrom_device_info *cdi,
2361 struct cdrom_multisession *ms_info)
2363 struct atapi_toc *toc;
2364 ide_drive_t *drive = cdi->handle;
2365 struct cdrom_info *info = drive->driver_data;
2366 struct request_sense sense;
2369 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0 || info->toc == NULL)
2370 if ((ret = cdrom_read_toc(drive, &sense)))
2374 ms_info->addr.lba = toc->last_session_lba;
2375 ms_info->xa_flag = toc->xa_flag;
2381 int ide_cdrom_get_mcn (struct cdrom_device_info *cdi,
2382 struct cdrom_mcn *mcn_info)
2386 ide_drive_t *drive = cdi->handle;
2389 if ((stat = cdrom_read_subchannel(drive, 2, mcnbuf, sizeof (mcnbuf), NULL)))
2392 memcpy (mcn_info->medium_catalog_number, mcnbuf+9,
2393 sizeof (mcn_info->medium_catalog_number)-1);
2394 mcn_info->medium_catalog_number[sizeof (mcn_info->medium_catalog_number)-1]
2402 /****************************************************************************
2403 * Other driver requests (open, close, check media change).
2407 int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi,
2410 ide_drive_t *drive = cdi->handle;
2411 struct cdrom_info *cd = drive->driver_data;
2414 if (slot_nr == CDSL_CURRENT) {
2415 (void) cdrom_check_status(drive, NULL);
2416 retval = (cd->cd_flags & IDE_CD_FLAG_MEDIA_CHANGED) ? 1 : 0;
2417 cd->cd_flags &= ~IDE_CD_FLAG_MEDIA_CHANGED;
2426 int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose)
2432 * Close down the device. Invalidate all cached blocks.
2436 void ide_cdrom_release_real (struct cdrom_device_info *cdi)
2438 ide_drive_t *drive = cdi->handle;
2439 struct cdrom_info *cd = drive->driver_data;
2441 if (!cdi->use_count)
2442 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
2445 #define IDE_CD_CAPABILITIES \
2446 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
2447 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
2448 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
2449 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
2450 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
2452 static struct cdrom_device_ops ide_cdrom_dops = {
2453 .open = ide_cdrom_open_real,
2454 .release = ide_cdrom_release_real,
2455 .drive_status = ide_cdrom_drive_status,
2456 .media_changed = ide_cdrom_check_media_change_real,
2457 .tray_move = ide_cdrom_tray_move,
2458 .lock_door = ide_cdrom_lock_door,
2459 .select_speed = ide_cdrom_select_speed,
2460 .get_last_session = ide_cdrom_get_last_session,
2461 .get_mcn = ide_cdrom_get_mcn,
2462 .reset = ide_cdrom_reset,
2463 .audio_ioctl = ide_cdrom_audio_ioctl,
2464 .capability = IDE_CD_CAPABILITIES,
2465 .generic_packet = ide_cdrom_packet,
2468 static int ide_cdrom_register (ide_drive_t *drive, int nslots)
2470 struct cdrom_info *info = drive->driver_data;
2471 struct cdrom_device_info *devinfo = &info->devinfo;
2473 devinfo->ops = &ide_cdrom_dops;
2474 devinfo->speed = info->current_speed;
2475 devinfo->capacity = nslots;
2476 devinfo->handle = drive;
2477 strcpy(devinfo->name, drive->name);
2479 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
2480 devinfo->mask |= CDC_SELECT_SPEED;
2482 devinfo->disk = info->disk;
2483 return register_cdrom(devinfo);
2487 int ide_cdrom_probe_capabilities (ide_drive_t *drive)
2489 struct cdrom_info *cd = drive->driver_data;
2490 struct cdrom_device_info *cdi = &cd->devinfo;
2491 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
2492 mechtype_t mechtype;
2495 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
2496 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
2497 CDC_MO_DRIVE | CDC_RAM);
2499 if (drive->media == ide_optical) {
2500 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
2501 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
2505 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
2506 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
2507 cdi->mask &= ~CDC_PLAY_AUDIO;
2512 * we have to cheat a little here. the packet will eventually
2513 * be queued with ide_cdrom_packet(), which extracts the
2514 * drive from cdi->handle. Since this device hasn't been
2515 * registered with the Uniform layer yet, it can't do this.
2516 * Same goes for cdi->ops.
2518 cdi->handle = drive;
2519 cdi->ops = &ide_cdrom_dops;
2521 if (ide_cdrom_get_capabilities(drive, buf))
2524 if ((buf[8 + 6] & 0x01) == 0)
2525 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
2526 if (buf[8 + 6] & 0x08)
2527 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
2528 if (buf[8 + 3] & 0x01)
2529 cdi->mask &= ~CDC_CD_R;
2530 if (buf[8 + 3] & 0x02)
2531 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
2532 if (buf[8 + 2] & 0x38)
2533 cdi->mask &= ~CDC_DVD;
2534 if (buf[8 + 3] & 0x20)
2535 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
2536 if (buf[8 + 3] & 0x10)
2537 cdi->mask &= ~CDC_DVD_R;
2538 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
2539 cdi->mask &= ~CDC_PLAY_AUDIO;
2541 mechtype = buf[8 + 6] >> 5;
2542 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
2543 cdi->mask |= CDC_CLOSE_TRAY;
2545 if (cdi->sanyo_slot > 0) {
2546 cdi->mask &= ~CDC_SELECT_DISC;
2548 } else if (mechtype == mechtype_individual_changer ||
2549 mechtype == mechtype_cartridge_changer) {
2550 nslots = cdrom_number_of_slots(cdi);
2552 cdi->mask &= ~CDC_SELECT_DISC;
2555 ide_cdrom_update_speed(drive, buf);
2557 printk(KERN_INFO "%s: ATAPI", drive->name);
2559 /* don't print speed if the drive reported 0 */
2561 printk(KERN_CONT " %dX", cd->max_speed);
2563 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
2565 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
2566 printk(KERN_CONT " DVD%s%s",
2567 (cdi->mask & CDC_DVD_R) ? "" : "-R",
2568 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
2570 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
2571 printk(KERN_CONT " CD%s%s",
2572 (cdi->mask & CDC_CD_R) ? "" : "-R",
2573 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
2575 if ((cdi->mask & CDC_SELECT_DISC) == 0)
2576 printk(KERN_CONT " changer w/%d slots", nslots);
2578 printk(KERN_CONT " drive");
2580 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
2585 #ifdef CONFIG_IDE_PROC_FS
2586 static void ide_cdrom_add_settings(ide_drive_t *drive)
2588 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
2591 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
2595 * standard prep_rq_fn that builds 10 byte cmds
2597 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
2599 int hard_sect = queue_hardsect_size(q);
2600 long block = (long)rq->hard_sector / (hard_sect >> 9);
2601 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
2603 memset(rq->cmd, 0, sizeof(rq->cmd));
2605 if (rq_data_dir(rq) == READ)
2606 rq->cmd[0] = GPCMD_READ_10;
2608 rq->cmd[0] = GPCMD_WRITE_10;
2613 rq->cmd[2] = (block >> 24) & 0xff;
2614 rq->cmd[3] = (block >> 16) & 0xff;
2615 rq->cmd[4] = (block >> 8) & 0xff;
2616 rq->cmd[5] = block & 0xff;
2619 * and transfer length
2621 rq->cmd[7] = (blocks >> 8) & 0xff;
2622 rq->cmd[8] = blocks & 0xff;
2628 * Most of the SCSI commands are supported directly by ATAPI devices.
2629 * This transform handles the few exceptions.
2631 static int ide_cdrom_prep_pc(struct request *rq)
2636 * Transform 6-byte read/write commands to the 10-byte version
2638 if (c[0] == READ_6 || c[0] == WRITE_6) {
2645 c[0] += (READ_10 - READ_6);
2651 * it's silly to pretend we understand 6-byte sense commands, just
2652 * reject with ILLEGAL_REQUEST and the caller should take the
2653 * appropriate action
2655 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
2656 rq->errors = ILLEGAL_REQUEST;
2657 return BLKPREP_KILL;
2663 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
2665 if (blk_fs_request(rq))
2666 return ide_cdrom_prep_fs(q, rq);
2667 else if (blk_pc_request(rq))
2668 return ide_cdrom_prep_pc(rq);
2673 struct cd_list_entry {
2674 const char *id_model;
2675 const char *id_firmware;
2676 unsigned int cd_flags;
2679 static const struct cd_list_entry ide_cd_quirks_list[] = {
2680 /* Limit transfer size per interrupt. */
2681 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
2682 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
2683 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
2684 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
2685 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
2686 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
2687 IDE_CD_FLAG_PRE_ATAPI12, },
2688 /* Vertos 300, some versions of this drive like to talk BCD. */
2689 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
2690 /* Vertos 600 ESD. */
2691 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
2693 * Sanyo 3 CD changer uses a non-standard command for CD changing
2694 * (by default standard ATAPI support for CD changers is used).
2696 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
2697 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
2698 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
2699 /* Stingray 8X CD-ROM. */
2700 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
2702 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
2703 * mode sense page capabilities size, but older drives break.
2705 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
2706 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
2707 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
2708 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
2710 * Some drives used by Apple don't advertise audio play
2711 * but they do support reading TOC & audio datas.
2713 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2714 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2715 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2716 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2720 static unsigned int ide_cd_flags(struct hd_driveid *id)
2722 const struct cd_list_entry *cle = ide_cd_quirks_list;
2724 while (cle->id_model) {
2725 if (strcmp(cle->id_model, id->model) == 0 &&
2726 (cle->id_firmware == NULL ||
2727 strstr(id->fw_rev, cle->id_firmware)))
2728 return cle->cd_flags;
2736 int ide_cdrom_setup (ide_drive_t *drive)
2738 struct cdrom_info *cd = drive->driver_data;
2739 struct cdrom_device_info *cdi = &cd->devinfo;
2740 struct hd_driveid *id = drive->id;
2743 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
2744 blk_queue_dma_alignment(drive->queue, 31);
2745 drive->queue->unplug_delay = (1 * HZ) / 1000;
2746 if (!drive->queue->unplug_delay)
2747 drive->queue->unplug_delay = 1;
2749 drive->special.all = 0;
2751 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
2754 if ((id->config & 0x0060) == 0x20)
2755 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
2757 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
2758 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
2759 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
2760 IDE_CD_FLAG_TOCADDR_AS_BCD);
2761 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
2762 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
2763 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
2764 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
2765 cdi->sanyo_slot = 3; /* 3 => use CD in slot 0 */
2767 nslots = ide_cdrom_probe_capabilities (drive);
2770 * set correct block size
2772 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
2774 if (drive->autotune == IDE_TUNE_DEFAULT ||
2775 drive->autotune == IDE_TUNE_AUTO)
2776 drive->dsc_overlap = (drive->next != drive);
2778 if (ide_cdrom_register(drive, nslots)) {
2779 printk (KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
2780 cd->devinfo.handle = NULL;
2783 ide_cdrom_add_settings(drive);
2787 #ifdef CONFIG_IDE_PROC_FS
2789 sector_t ide_cdrom_capacity (ide_drive_t *drive)
2791 unsigned long capacity, sectors_per_frame;
2793 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
2796 return capacity * sectors_per_frame;
2800 static void ide_cd_remove(ide_drive_t *drive)
2802 struct cdrom_info *info = drive->driver_data;
2804 ide_proc_unregister_driver(drive, info->driver);
2806 del_gendisk(info->disk);
2811 static void ide_cd_release(struct kref *kref)
2813 struct cdrom_info *info = to_ide_cd(kref);
2814 struct cdrom_device_info *devinfo = &info->devinfo;
2815 ide_drive_t *drive = info->drive;
2816 struct gendisk *g = info->disk;
2818 kfree(info->buffer);
2820 if (devinfo->handle == drive && unregister_cdrom(devinfo))
2821 printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
2822 "driver.\n", __FUNCTION__, drive->name);
2823 drive->dsc_overlap = 0;
2824 drive->driver_data = NULL;
2825 blk_queue_prep_rq(drive->queue, NULL);
2826 g->private_data = NULL;
2831 static int ide_cd_probe(ide_drive_t *);
2833 #ifdef CONFIG_IDE_PROC_FS
2834 static int proc_idecd_read_capacity
2835 (char *page, char **start, off_t off, int count, int *eof, void *data)
2837 ide_drive_t *drive = data;
2840 len = sprintf(page,"%llu\n", (long long)ide_cdrom_capacity(drive));
2841 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
2844 static ide_proc_entry_t idecd_proc[] = {
2845 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
2846 { NULL, 0, NULL, NULL }
2850 static ide_driver_t ide_cdrom_driver = {
2852 .owner = THIS_MODULE,
2853 .name = "ide-cdrom",
2854 .bus = &ide_bus_type,
2856 .probe = ide_cd_probe,
2857 .remove = ide_cd_remove,
2858 .version = IDECD_VERSION,
2860 .supports_dsc_overlap = 1,
2861 .do_request = ide_do_rw_cdrom,
2862 .end_request = ide_end_request,
2863 .error = __ide_error,
2864 .abort = __ide_abort,
2865 #ifdef CONFIG_IDE_PROC_FS
2870 static int idecd_open(struct inode * inode, struct file * file)
2872 struct gendisk *disk = inode->i_bdev->bd_disk;
2873 struct cdrom_info *info;
2876 if (!(info = ide_cd_get(disk)))
2880 info->buffer = kmalloc(SECTOR_BUFFER_SIZE, GFP_KERNEL|__GFP_REPEAT);
2883 rc = cdrom_open(&info->devinfo, inode, file);
2891 static int idecd_release(struct inode * inode, struct file * file)
2893 struct gendisk *disk = inode->i_bdev->bd_disk;
2894 struct cdrom_info *info = ide_cd_g(disk);
2896 cdrom_release (&info->devinfo, file);
2903 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2905 struct packet_command cgc;
2910 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2913 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2915 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2919 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2920 return cdrom_mode_select(cdi, &cgc);
2923 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2925 struct packet_command cgc;
2930 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2932 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2936 spindown = buffer[11] & 0x0f;
2937 if (copy_to_user((void __user *)arg, &spindown, sizeof (char)))
2942 static int idecd_ioctl (struct inode *inode, struct file *file,
2943 unsigned int cmd, unsigned long arg)
2945 struct block_device *bdev = inode->i_bdev;
2946 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2950 case CDROMSETSPINDOWN:
2951 return idecd_set_spindown(&info->devinfo, arg);
2952 case CDROMGETSPINDOWN:
2953 return idecd_get_spindown(&info->devinfo, arg);
2958 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2960 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2965 static int idecd_media_changed(struct gendisk *disk)
2967 struct cdrom_info *info = ide_cd_g(disk);
2968 return cdrom_media_changed(&info->devinfo);
2971 static int idecd_revalidate_disk(struct gendisk *disk)
2973 struct cdrom_info *info = ide_cd_g(disk);
2974 struct request_sense sense;
2975 cdrom_read_toc(info->drive, &sense);
2979 static struct block_device_operations idecd_ops = {
2980 .owner = THIS_MODULE,
2982 .release = idecd_release,
2983 .ioctl = idecd_ioctl,
2984 .media_changed = idecd_media_changed,
2985 .revalidate_disk= idecd_revalidate_disk
2989 static char *ignore = NULL;
2991 module_param(ignore, charp, 0400);
2992 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2994 static int ide_cd_probe(ide_drive_t *drive)
2996 struct cdrom_info *info;
2998 struct request_sense sense;
3000 if (!strstr("ide-cdrom", drive->driver_req))
3002 if (!drive->present)
3004 if (drive->media != ide_cdrom && drive->media != ide_optical)
3006 /* skip drives that we were told to ignore */
3007 if (ignore != NULL) {
3008 if (strstr(ignore, drive->name)) {
3009 printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
3014 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
3017 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
3019 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
3023 g = alloc_disk(1 << PARTN_BITS);
3027 ide_init_disk(g, drive);
3029 ide_proc_register_driver(drive, &ide_cdrom_driver);
3031 kref_init(&info->kref);
3033 info->drive = drive;
3034 info->driver = &ide_cdrom_driver;
3037 g->private_data = &info->driver;
3039 drive->driver_data = info;
3042 g->driverfs_dev = &drive->gendev;
3043 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
3044 if (ide_cdrom_setup(drive)) {
3045 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
3046 ide_cd_release(&info->kref);
3050 cdrom_read_toc(drive, &sense);
3051 g->fops = &idecd_ops;
3052 g->flags |= GENHD_FL_REMOVABLE;
3062 static void __exit ide_cdrom_exit(void)
3064 driver_unregister(&ide_cdrom_driver.gen_driver);
3067 static int __init ide_cdrom_init(void)
3069 return driver_register(&ide_cdrom_driver.gen_driver);
3072 MODULE_ALIAS("ide:*m-cdrom*");
3073 MODULE_ALIAS("ide-cd");
3074 module_init(ide_cdrom_init);
3075 module_exit(ide_cdrom_exit);
3076 MODULE_LICENSE("GPL");