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 ide_cd_init_rq(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 ide_cd_init_rq(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);
1171 static int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
1173 struct request_sense sense;
1175 unsigned int flags = rq->cmd_flags;
1177 if (rq->sense == NULL)
1180 /* Start of retry loop. */
1183 unsigned long time = jiffies;
1184 rq->cmd_flags = flags;
1186 error = ide_do_drive_cmd(drive, rq, ide_wait);
1187 time = jiffies - time;
1189 /* FIXME: we should probably abort/retry or something
1190 * in case of failure */
1191 if (rq->cmd_flags & REQ_FAILED) {
1192 /* The request failed. Retry if it was due to a unit
1194 (usually means media was changed). */
1195 struct request_sense *reqbuf = rq->sense;
1197 if (reqbuf->sense_key == UNIT_ATTENTION)
1198 cdrom_saw_media_change(drive);
1199 else if (reqbuf->sense_key == NOT_READY &&
1200 reqbuf->asc == 4 && reqbuf->ascq != 4) {
1201 /* The drive is in the process of loading
1202 a disk. Retry, but wait a little to give
1203 the drive time to complete the load. */
1206 /* Otherwise, don't retry. */
1212 /* End of retry loop. */
1213 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
1215 /* Return an error if the command failed. */
1216 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
1222 static int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
1224 /* Two notes about IDE interrupt reason here - 0 means that
1225 * the drive wants to receive data from us, 2 means that
1226 * the drive is expecting to transfer data to us.
1230 else if (ireason == 2) {
1231 ide_hwif_t *hwif = drive->hwif;
1233 /* Whoops... The drive wants to send data. */
1234 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
1235 drive->name, __FUNCTION__);
1237 ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len);
1239 /* Drive wants a command packet, or invalid ireason... */
1240 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
1241 drive->name, __FUNCTION__, ireason);
1244 cdrom_end_request(drive, 0);
1249 * Called from blk_end_request_callback() after the data of the request
1250 * is completed and before the request is completed.
1251 * By returning value '1', blk_end_request_callback() returns immediately
1252 * without completing the request.
1254 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
1260 * best way to deal with dma that is not sector aligned right now... note
1261 * that in this path we are not using ->data or ->buffer at all. this irs
1262 * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the
1265 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
1267 struct cdrom_info *info = drive->driver_data;
1268 struct request *rq = HWGROUP(drive)->rq;
1269 int dma_error, dma, stat, ireason, len, thislen;
1271 xfer_func_t *xferfunc;
1272 unsigned long flags;
1274 /* Check for errors. */
1279 dma_error = HWIF(drive)->ide_dma_end(drive);
1281 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
1282 rq_data_dir(rq) ? "write" : "read");
1287 if (cdrom_decode_status(drive, 0, &stat))
1291 * using dma, transfer is complete now
1295 return ide_error(drive, "dma error", stat);
1297 spin_lock_irqsave(&ide_lock, flags);
1298 if (__blk_end_request(rq, 0, rq->data_len))
1300 HWGROUP(drive)->rq = NULL;
1301 spin_unlock_irqrestore(&ide_lock, flags);
1307 * ok we fall to pio :/
1309 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1310 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1311 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1313 len = lowcyl + (256 * highcyl);
1314 thislen = rq->data_len;
1319 * If DRQ is clear, the command has completed.
1321 if ((stat & DRQ_STAT) == 0) {
1322 spin_lock_irqsave(&ide_lock, flags);
1323 if (__blk_end_request(rq, 0, rq->data_len))
1325 HWGROUP(drive)->rq = NULL;
1326 spin_unlock_irqrestore(&ide_lock, flags);
1332 * check which way to transfer data
1334 if (rq_data_dir(rq) == WRITE) {
1338 if (cdrom_write_check_ireason(drive, len, ireason))
1341 xferfunc = HWIF(drive)->atapi_output_bytes;
1346 if (cdrom_read_check_ireason(drive, len, ireason))
1349 xferfunc = HWIF(drive)->atapi_input_bytes;
1355 while (thislen > 0) {
1356 int blen = blen = rq->data_len;
1357 char *ptr = rq->data;
1363 ptr = bio_data(rq->bio);
1364 blen = bio_iovec(rq->bio)->bv_len;
1368 printk(KERN_ERR "%s: confused, missing data\n", drive->name);
1375 xferfunc(drive, ptr, blen);
1379 rq->data_len -= blen;
1383 * The request can't be completed until DRQ is cleared.
1384 * So complete the data, but don't complete the request
1385 * using the dummy function for the callback feature
1386 * of blk_end_request_callback().
1388 blk_end_request_callback(rq, 0, blen,
1389 cdrom_newpc_intr_dummy_cb);
1398 ide_cd_pad_transfer(drive, xferfunc, len);
1400 BUG_ON(HWGROUP(drive)->handler != NULL);
1402 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
1406 static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
1408 int stat, ireason, len, sectors_to_transfer, uptodate;
1409 struct cdrom_info *info = drive->driver_data;
1410 int dma_error = 0, dma = info->dma;
1411 u8 lowcyl = 0, highcyl = 0;
1413 struct request *rq = HWGROUP(drive)->rq;
1415 /* Check for errors. */
1418 dma_error = HWIF(drive)->ide_dma_end(drive);
1420 printk(KERN_ERR "%s: DMA write error\n", drive->name);
1425 if (cdrom_decode_status(drive, 0, &stat))
1429 * using dma, transfer is complete now
1433 return ide_error(drive, "dma error", stat);
1435 ide_end_request(drive, 1, rq->nr_sectors);
1439 /* Read the interrupt reason and the transfer length. */
1440 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1441 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1442 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1444 len = lowcyl + (256 * highcyl);
1446 /* If DRQ is clear, the command has completed. */
1447 if ((stat & DRQ_STAT) == 0) {
1448 /* If we're not done writing, complain.
1449 * Otherwise, complete the command normally.
1452 if (rq->current_nr_sectors > 0) {
1453 printk(KERN_ERR "%s: %s: data underrun (%d blocks)\n",
1454 drive->name, __FUNCTION__,
1455 rq->current_nr_sectors);
1458 cdrom_end_request(drive, uptodate);
1462 /* Check that the drive is expecting to do the same thing we are. */
1463 if (cdrom_write_check_ireason(drive, len, ireason))
1466 sectors_to_transfer = len / SECTOR_SIZE;
1469 * now loop and write out the data
1471 while (sectors_to_transfer > 0) {
1474 if (!rq->current_nr_sectors) {
1475 printk(KERN_ERR "%s: %s: confused, missing data\n",
1476 drive->name, __FUNCTION__);
1481 * Figure out how many sectors we can transfer
1483 this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors);
1485 while (this_transfer > 0) {
1486 HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
1487 rq->buffer += SECTOR_SIZE;
1489 --rq->current_nr_sectors;
1492 --sectors_to_transfer;
1496 * current buffer complete, move on
1498 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1499 cdrom_end_request(drive, 1);
1502 /* re-arm handler */
1503 ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL);
1507 static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
1509 struct request *rq = HWGROUP(drive)->rq;
1511 #if 0 /* the immediate bit */
1512 rq->cmd[1] = 1 << 3;
1514 rq->timeout = ATAPI_WAIT_PC;
1516 return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
1519 static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
1521 struct cdrom_info *info = drive->driver_data;
1522 struct gendisk *g = info->disk;
1523 unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1526 * writes *must* be hardware frame aligned
1528 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1529 (rq->sector & (sectors_per_frame - 1))) {
1530 cdrom_end_request(drive, 0);
1535 * disk has become write protected
1538 cdrom_end_request(drive, 0);
1542 info->nsectors_buffered = 0;
1544 /* use dma, if possible. we don't need to check more, since we
1545 * know that the transfer is always (at least!) frame aligned */
1546 info->dma = drive->using_dma ? 1 : 0;
1548 info->devinfo.media_written = 1;
1550 /* Start sending the write request to the drive. */
1551 return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
1554 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1556 struct request *rq = HWGROUP(drive)->rq;
1559 rq->timeout = ATAPI_WAIT_PC;
1561 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1564 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1566 struct cdrom_info *info = drive->driver_data;
1568 rq->cmd_flags |= REQ_QUIET;
1576 int mask = drive->queue->dma_alignment;
1577 unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
1579 info->dma = drive->using_dma;
1582 * check if dma is safe
1584 * NOTE! The "len" and "addr" checks should possibly have
1587 if ((rq->data_len & 15) || (addr & mask))
1591 /* Start sending the command to the drive. */
1592 return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
1595 /****************************************************************************
1596 * cdrom driver request routine.
1598 static ide_startstop_t
1599 ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
1601 ide_startstop_t action;
1602 struct cdrom_info *info = drive->driver_data;
1604 if (blk_fs_request(rq)) {
1605 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1606 unsigned long elapsed = jiffies - info->start_seek;
1607 int stat = HWIF(drive)->INB(IDE_STATUS_REG);
1609 if ((stat & SEEK_STAT) != SEEK_STAT) {
1610 if (elapsed < IDECD_SEEK_TIMEOUT) {
1611 ide_stall_queue(drive, IDECD_SEEK_TIMER);
1614 printk (KERN_ERR "%s: DSC timeout\n", drive->name);
1616 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1618 if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) {
1619 action = cdrom_start_seek(drive, block);
1621 if (rq_data_dir(rq) == READ)
1622 action = cdrom_start_read(drive, block);
1624 action = cdrom_start_write(drive, rq);
1626 info->last_block = block;
1628 } else if (rq->cmd_type == REQ_TYPE_SENSE ||
1629 rq->cmd_type == REQ_TYPE_ATA_PC) {
1630 return cdrom_do_packet_command(drive);
1631 } else if (blk_pc_request(rq)) {
1632 return cdrom_do_block_pc(drive, rq);
1633 } else if (blk_special_request(rq)) {
1635 * right now this can only be a reset...
1637 cdrom_end_request(drive, 1);
1641 blk_dump_rq_flags(rq, "ide-cd bad flags");
1642 cdrom_end_request(drive, 0);
1648 /****************************************************************************
1651 * Routines which queue packet commands take as a final argument a pointer
1652 * to a request_sense struct. If execution of the command results
1653 * in an error with a CHECK CONDITION status, this structure will be filled
1654 * with the results of the subsequent request sense command. The pointer
1655 * can also be NULL, in which case no sense information is returned.
1659 void msf_from_bcd (struct atapi_msf *msf)
1661 msf->minute = BCD2BIN(msf->minute);
1662 msf->second = BCD2BIN(msf->second);
1663 msf->frame = BCD2BIN(msf->frame);
1666 static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1669 struct cdrom_info *info = drive->driver_data;
1670 struct cdrom_device_info *cdi = &info->devinfo;
1672 ide_cd_init_rq(drive, &req);
1675 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1676 req.cmd_flags |= REQ_QUIET;
1679 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to
1680 * switch CDs instead of supporting the LOAD_UNLOAD opcode.
1682 req.cmd[7] = cdi->sanyo_slot % 3;
1684 return ide_cd_queue_pc(drive, &req);
1687 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
1688 static int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
1689 struct request_sense *sense)
1691 struct cdrom_info *cd = drive->driver_data;
1692 struct request_sense my_sense;
1699 /* If the drive cannot lock the door, just pretend. */
1700 if (cd->cd_flags & IDE_CD_FLAG_NO_DOORLOCK) {
1703 ide_cd_init_rq(drive, &req);
1705 req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
1706 req.cmd[4] = lockflag ? 1 : 0;
1707 stat = ide_cd_queue_pc(drive, &req);
1710 /* If we got an illegal field error, the drive
1711 probably cannot lock the door. */
1713 sense->sense_key == ILLEGAL_REQUEST &&
1714 (sense->asc == 0x24 || sense->asc == 0x20)) {
1715 printk (KERN_ERR "%s: door locking not supported\n",
1717 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1721 /* no medium, that's alright. */
1722 if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
1727 cd->cd_flags |= IDE_CD_FLAG_DOOR_LOCKED;
1729 cd->cd_flags &= ~IDE_CD_FLAG_DOOR_LOCKED;
1736 /* Eject the disk if EJECTFLAG is 0.
1737 If EJECTFLAG is 1, try to reload the disk. */
1738 static int cdrom_eject(ide_drive_t *drive, int ejectflag,
1739 struct request_sense *sense)
1741 struct cdrom_info *cd = drive->driver_data;
1742 struct cdrom_device_info *cdi = &cd->devinfo;
1746 if ((cd->cd_flags & IDE_CD_FLAG_NO_EJECT) && !ejectflag)
1747 return -EDRIVE_CANT_DO_THIS;
1749 /* reload fails on some drives, if the tray is locked */
1750 if ((cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED) && ejectflag)
1753 ide_cd_init_rq(drive, &req);
1755 /* only tell drive to close tray if open, if it can do that */
1756 if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
1760 req.cmd[0] = GPCMD_START_STOP_UNIT;
1761 req.cmd[4] = loej | (ejectflag != 0);
1763 return ide_cd_queue_pc(drive, &req);
1766 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1767 unsigned long *sectors_per_frame,
1768 struct request_sense *sense)
1778 ide_cd_init_rq(drive, &req);
1781 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1782 req.data = (char *)&capbuf;
1783 req.data_len = sizeof(capbuf);
1784 req.cmd_flags |= REQ_QUIET;
1786 stat = ide_cd_queue_pc(drive, &req);
1788 *capacity = 1 + be32_to_cpu(capbuf.lba);
1789 *sectors_per_frame =
1790 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1796 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1797 int format, char *buf, int buflen,
1798 struct request_sense *sense)
1802 ide_cd_init_rq(drive, &req);
1806 req.data_len = buflen;
1807 req.cmd_flags |= REQ_QUIET;
1808 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1809 req.cmd[6] = trackno;
1810 req.cmd[7] = (buflen >> 8);
1811 req.cmd[8] = (buflen & 0xff);
1812 req.cmd[9] = (format << 6);
1817 return ide_cd_queue_pc(drive, &req);
1821 /* Try to read the entire TOC for the disk into our internal buffer. */
1822 static int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1824 int stat, ntracks, i;
1825 struct cdrom_info *info = drive->driver_data;
1826 struct cdrom_device_info *cdi = &info->devinfo;
1827 struct atapi_toc *toc = info->toc;
1829 struct atapi_toc_header hdr;
1830 struct atapi_toc_entry ent;
1833 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1836 /* Try to allocate space. */
1837 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1839 printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
1845 /* Check to see if the existing data is still valid.
1846 If it is, just return. */
1847 (void) cdrom_check_status(drive, sense);
1849 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1852 /* Try to get the total cdrom capacity and sector size. */
1853 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
1856 toc->capacity = 0x1fffff;
1858 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1859 /* Save a private copy of te TOC capacity for error handling */
1860 drive->probed_capacity = toc->capacity * sectors_per_frame;
1862 blk_queue_hardsect_size(drive->queue,
1863 sectors_per_frame << SECTOR_BITS);
1865 /* First read just the header, so we know how long the TOC is. */
1866 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1867 sizeof(struct atapi_toc_header), sense);
1871 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1872 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1873 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1876 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1879 if (ntracks > MAX_TRACKS)
1880 ntracks = MAX_TRACKS;
1882 /* Now read the whole schmeer. */
1883 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1885 sizeof(struct atapi_toc_header) +
1887 sizeof(struct atapi_toc_entry), sense);
1889 if (stat && toc->hdr.first_track > 1) {
1890 /* Cds with CDI tracks only don't have any TOC entries,
1891 despite of this the returned values are
1892 first_track == last_track = number of CDI tracks + 1,
1893 so that this case is indistinguishable from the same
1894 layout plus an additional audio track.
1895 If we get an error for the regular case, we assume
1896 a CDI without additional audio tracks. In this case
1897 the readable TOC is empty (CDI tracks are not included)
1898 and only holds the Leadout entry. Heiko Eißfeldt */
1900 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1902 sizeof(struct atapi_toc_header) +
1904 sizeof(struct atapi_toc_entry),
1909 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1910 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1911 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1913 toc->hdr.first_track = CDROM_LEADOUT;
1914 toc->hdr.last_track = CDROM_LEADOUT;
1921 toc->hdr.toc_length = ntohs (toc->hdr.toc_length);
1923 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1924 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1925 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1928 for (i = 0; i <= ntracks; i++) {
1929 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1930 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1931 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1932 msf_from_bcd(&toc->ent[i].addr.msf);
1934 toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute,
1935 toc->ent[i].addr.msf.second,
1936 toc->ent[i].addr.msf.frame);
1939 /* Read the multisession information. */
1940 if (toc->hdr.first_track != CDROM_LEADOUT) {
1941 /* Read the multisession information. */
1942 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1943 sizeof(ms_tmp), sense);
1947 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1949 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
1950 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1953 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1954 /* Re-read multisession information using MSF format */
1955 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1956 sizeof(ms_tmp), sense);
1960 msf_from_bcd (&ms_tmp.ent.addr.msf);
1961 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1962 ms_tmp.ent.addr.msf.second,
1963 ms_tmp.ent.addr.msf.frame);
1966 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1968 /* Now try to get the total cdrom capacity. */
1969 stat = cdrom_get_last_written(cdi, &last_written);
1970 if (!stat && (last_written > toc->capacity)) {
1971 toc->capacity = last_written;
1972 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1973 drive->probed_capacity = toc->capacity * sectors_per_frame;
1976 /* Remember that we've read this stuff. */
1977 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1982 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
1984 struct cdrom_info *cd = drive->driver_data;
1985 struct cdrom_tochdr *tochdr = arg;
1986 struct atapi_toc *toc;
1989 /* Make sure our saved TOC is valid. */
1990 stat = ide_cd_read_toc(drive, NULL);
1995 tochdr->cdth_trk0 = toc->hdr.first_track;
1996 tochdr->cdth_trk1 = toc->hdr.last_track;
2001 static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
2002 struct atapi_toc_entry **ent)
2004 struct cdrom_info *info = drive->driver_data;
2005 struct atapi_toc *toc = info->toc;
2009 * don't serve cached data, if the toc isn't valid
2011 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0)
2014 /* Check validity of requested track number. */
2015 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
2017 if (toc->hdr.first_track == CDROM_LEADOUT)
2020 if (track == CDROM_LEADOUT)
2021 *ent = &toc->ent[ntracks];
2022 else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
2025 *ent = &toc->ent[track - toc->hdr.first_track];
2030 static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
2032 struct cdrom_tocentry *tocentry = arg;
2033 struct atapi_toc_entry *toce;
2036 stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
2040 tocentry->cdte_ctrl = toce->control;
2041 tocentry->cdte_adr = toce->adr;
2042 if (tocentry->cdte_format == CDROM_MSF) {
2043 lba_to_msf(toce->addr.lba,
2044 &tocentry->cdte_addr.msf.minute,
2045 &tocentry->cdte_addr.msf.second,
2046 &tocentry->cdte_addr.msf.frame);
2048 tocentry->cdte_addr.lba = toce->addr.lba;
2053 static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
2055 struct cdrom_ti *ti = arg;
2056 struct atapi_toc_entry *first_toc, *last_toc;
2057 unsigned long lba_start, lba_end;
2060 struct request_sense sense;
2062 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
2066 stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
2070 if (ti->cdti_trk1 != CDROM_LEADOUT)
2072 lba_start = first_toc->addr.lba;
2073 lba_end = last_toc->addr.lba;
2075 if (lba_end <= lba_start)
2078 ide_cd_init_rq(drive, &rq);
2081 rq.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2082 lba_to_msf(lba_start, &rq.cmd[3], &rq.cmd[4], &rq.cmd[5]);
2083 lba_to_msf(lba_end - 1, &rq.cmd[6], &rq.cmd[7], &rq.cmd[8]);
2085 return ide_cd_queue_pc(drive, &rq);
2088 /* the generic packet interface to cdrom.c */
2089 static int ide_cdrom_packet(struct cdrom_device_info *cdi,
2090 struct packet_command *cgc)
2093 ide_drive_t *drive = cdi->handle;
2095 if (cgc->timeout <= 0)
2096 cgc->timeout = ATAPI_WAIT_PC;
2098 /* here we queue the commands from the uniform CD-ROM
2099 layer. the packet must be complete, as we do not
2101 ide_cd_init_rq(drive, &req);
2102 memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
2104 memset(cgc->sense, 0, sizeof(struct request_sense));
2105 req.data = cgc->buffer;
2106 req.data_len = cgc->buflen;
2107 req.timeout = cgc->timeout;
2110 req.cmd_flags |= REQ_QUIET;
2112 req.sense = cgc->sense;
2113 cgc->stat = ide_cd_queue_pc(drive, &req);
2115 cgc->buflen -= req.data_len;
2119 static int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
2120 unsigned int cmd, void *arg)
2122 ide_drive_t *drive = cdi->handle;
2126 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
2127 * atapi doesn't support it
2129 case CDROMPLAYTRKIND:
2130 return ide_cd_fake_play_trkind(drive, arg);
2131 case CDROMREADTOCHDR:
2132 return ide_cd_read_tochdr(drive, arg);
2133 case CDROMREADTOCENTRY:
2134 return ide_cd_read_tocentry(drive, arg);
2141 int ide_cdrom_reset (struct cdrom_device_info *cdi)
2143 ide_drive_t *drive = cdi->handle;
2144 struct cdrom_info *cd = drive->driver_data;
2145 struct request_sense sense;
2149 ide_cd_init_rq(drive, &req);
2150 req.cmd_type = REQ_TYPE_SPECIAL;
2151 req.cmd_flags = REQ_QUIET;
2152 ret = ide_do_drive_cmd(drive, &req, ide_wait);
2155 * A reset will unlock the door. If it was previously locked,
2158 if (cd->cd_flags & IDE_CD_FLAG_DOOR_LOCKED)
2159 (void)ide_cd_lockdoor(drive, 1, &sense);
2166 int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position)
2168 ide_drive_t *drive = cdi->handle;
2169 struct request_sense sense;
2172 int stat = ide_cd_lockdoor(drive, 0, &sense);
2178 return cdrom_eject(drive, !position, &sense);
2182 int ide_cdrom_lock_door (struct cdrom_device_info *cdi, int lock)
2184 ide_drive_t *drive = cdi->handle;
2186 return ide_cd_lockdoor(drive, lock, NULL);
2189 static int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
2191 struct cdrom_info *info = drive->driver_data;
2192 struct cdrom_device_info *cdi = &info->devinfo;
2193 struct packet_command cgc;
2194 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
2196 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
2197 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
2199 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
2200 do { /* we seem to get stat=0x01,err=0x00 the first time (??) */
2201 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
2204 } while (--attempts);
2208 static void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
2210 struct cdrom_info *cd = drive->driver_data;
2211 u16 curspeed, maxspeed;
2213 curspeed = *(u16 *)&buf[8 + 14];
2214 maxspeed = *(u16 *)&buf[8 + 8];
2216 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
2217 curspeed = le16_to_cpu(curspeed);
2218 maxspeed = le16_to_cpu(maxspeed);
2220 curspeed = be16_to_cpu(curspeed);
2221 maxspeed = be16_to_cpu(maxspeed);
2224 cd->current_speed = (curspeed + (176/2)) / 176;
2225 cd->max_speed = (maxspeed + (176/2)) / 176;
2229 * ATAPI devices are free to select the speed you request or any slower
2230 * rate. :-( Requesting too fast a speed will _not_ produce an error.
2232 static int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
2234 ide_drive_t *drive = cdi->handle;
2235 struct cdrom_info *cd = drive->driver_data;
2237 struct request_sense sense;
2238 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
2241 ide_cd_init_rq(drive, &rq);
2246 speed = 0xffff; /* set to max */
2248 speed *= 177; /* Nx to kbytes/s */
2250 rq.cmd[0] = GPCMD_SET_SPEED;
2251 /* Read Drive speed in kbytes/second MSB/LSB */
2252 rq.cmd[2] = (speed >> 8) & 0xff;
2253 rq.cmd[3] = speed & 0xff;
2254 if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
2255 (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
2256 /* Write Drive speed in kbytes/second MSB/LSB */
2257 rq.cmd[4] = (speed >> 8) & 0xff;
2258 rq.cmd[5] = speed & 0xff;
2261 stat = ide_cd_queue_pc(drive, &rq);
2263 if (!ide_cdrom_get_capabilities(drive, buf)) {
2264 ide_cdrom_update_speed(drive, buf);
2265 cdi->speed = cd->current_speed;
2272 * add logic to try GET_EVENT command first to check for media and tray
2273 * status. this should be supported by newer cd-r/w and all DVD etc
2277 int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
2279 ide_drive_t *drive = cdi->handle;
2280 struct media_event_desc med;
2281 struct request_sense sense;
2284 if (slot_nr != CDSL_CURRENT)
2287 stat = cdrom_check_status(drive, &sense);
2288 if (!stat || sense.sense_key == UNIT_ATTENTION)
2291 if (!cdrom_get_media_event(cdi, &med)) {
2292 if (med.media_present)
2294 else if (med.door_open)
2295 return CDS_TRAY_OPEN;
2300 if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04)
2304 * If not using Mt Fuji extended media tray reports,
2305 * just return TRAY_OPEN since ATAPI doesn't provide
2306 * any other way to detect this...
2308 if (sense.sense_key == NOT_READY) {
2309 if (sense.asc == 0x3a && sense.ascq == 1)
2312 return CDS_TRAY_OPEN;
2314 return CDS_DRIVE_NOT_READY;
2318 int ide_cdrom_get_last_session (struct cdrom_device_info *cdi,
2319 struct cdrom_multisession *ms_info)
2321 struct atapi_toc *toc;
2322 ide_drive_t *drive = cdi->handle;
2323 struct cdrom_info *info = drive->driver_data;
2324 struct request_sense sense;
2327 if ((info->cd_flags & IDE_CD_FLAG_TOC_VALID) == 0 || !info->toc) {
2328 ret = ide_cd_read_toc(drive, &sense);
2334 ms_info->addr.lba = toc->last_session_lba;
2335 ms_info->xa_flag = toc->xa_flag;
2340 static int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
2341 struct cdrom_mcn *mcn_info)
2343 ide_drive_t *drive = cdi->handle;
2348 ide_cd_init_rq(drive, &rq);
2351 rq.data_len = sizeof(buf);
2353 rq.cmd[0] = GPCMD_READ_SUBCHANNEL;
2354 rq.cmd[1] = 2; /* MSF addressing */
2355 rq.cmd[2] = 0x40; /* request subQ data */
2356 rq.cmd[3] = 2; /* format */
2357 rq.cmd[8] = sizeof(buf);
2359 stat = ide_cd_queue_pc(drive, &rq);
2363 mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
2364 memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
2365 mcn_info->medium_catalog_number[mcnlen] = '\0';
2370 /****************************************************************************
2371 * Other driver requests (open, close, check media change).
2375 int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi,
2378 ide_drive_t *drive = cdi->handle;
2379 struct cdrom_info *cd = drive->driver_data;
2382 if (slot_nr == CDSL_CURRENT) {
2383 (void) cdrom_check_status(drive, NULL);
2384 retval = (cd->cd_flags & IDE_CD_FLAG_MEDIA_CHANGED) ? 1 : 0;
2385 cd->cd_flags &= ~IDE_CD_FLAG_MEDIA_CHANGED;
2394 int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose)
2400 * Close down the device. Invalidate all cached blocks.
2404 void ide_cdrom_release_real (struct cdrom_device_info *cdi)
2406 ide_drive_t *drive = cdi->handle;
2407 struct cdrom_info *cd = drive->driver_data;
2409 if (!cdi->use_count)
2410 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
2413 #define IDE_CD_CAPABILITIES \
2414 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
2415 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
2416 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
2417 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
2418 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
2420 static struct cdrom_device_ops ide_cdrom_dops = {
2421 .open = ide_cdrom_open_real,
2422 .release = ide_cdrom_release_real,
2423 .drive_status = ide_cdrom_drive_status,
2424 .media_changed = ide_cdrom_check_media_change_real,
2425 .tray_move = ide_cdrom_tray_move,
2426 .lock_door = ide_cdrom_lock_door,
2427 .select_speed = ide_cdrom_select_speed,
2428 .get_last_session = ide_cdrom_get_last_session,
2429 .get_mcn = ide_cdrom_get_mcn,
2430 .reset = ide_cdrom_reset,
2431 .audio_ioctl = ide_cdrom_audio_ioctl,
2432 .capability = IDE_CD_CAPABILITIES,
2433 .generic_packet = ide_cdrom_packet,
2436 static int ide_cdrom_register (ide_drive_t *drive, int nslots)
2438 struct cdrom_info *info = drive->driver_data;
2439 struct cdrom_device_info *devinfo = &info->devinfo;
2441 devinfo->ops = &ide_cdrom_dops;
2442 devinfo->speed = info->current_speed;
2443 devinfo->capacity = nslots;
2444 devinfo->handle = drive;
2445 strcpy(devinfo->name, drive->name);
2447 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
2448 devinfo->mask |= CDC_SELECT_SPEED;
2450 devinfo->disk = info->disk;
2451 return register_cdrom(devinfo);
2455 int ide_cdrom_probe_capabilities (ide_drive_t *drive)
2457 struct cdrom_info *cd = drive->driver_data;
2458 struct cdrom_device_info *cdi = &cd->devinfo;
2459 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
2460 mechtype_t mechtype;
2463 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
2464 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
2465 CDC_MO_DRIVE | CDC_RAM);
2467 if (drive->media == ide_optical) {
2468 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
2469 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
2473 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
2474 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
2475 cdi->mask &= ~CDC_PLAY_AUDIO;
2480 * we have to cheat a little here. the packet will eventually
2481 * be queued with ide_cdrom_packet(), which extracts the
2482 * drive from cdi->handle. Since this device hasn't been
2483 * registered with the Uniform layer yet, it can't do this.
2484 * Same goes for cdi->ops.
2486 cdi->handle = drive;
2487 cdi->ops = &ide_cdrom_dops;
2489 if (ide_cdrom_get_capabilities(drive, buf))
2492 if ((buf[8 + 6] & 0x01) == 0)
2493 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
2494 if (buf[8 + 6] & 0x08)
2495 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
2496 if (buf[8 + 3] & 0x01)
2497 cdi->mask &= ~CDC_CD_R;
2498 if (buf[8 + 3] & 0x02)
2499 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
2500 if (buf[8 + 2] & 0x38)
2501 cdi->mask &= ~CDC_DVD;
2502 if (buf[8 + 3] & 0x20)
2503 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
2504 if (buf[8 + 3] & 0x10)
2505 cdi->mask &= ~CDC_DVD_R;
2506 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
2507 cdi->mask &= ~CDC_PLAY_AUDIO;
2509 mechtype = buf[8 + 6] >> 5;
2510 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
2511 cdi->mask |= CDC_CLOSE_TRAY;
2513 if (cdi->sanyo_slot > 0) {
2514 cdi->mask &= ~CDC_SELECT_DISC;
2516 } else if (mechtype == mechtype_individual_changer ||
2517 mechtype == mechtype_cartridge_changer) {
2518 nslots = cdrom_number_of_slots(cdi);
2520 cdi->mask &= ~CDC_SELECT_DISC;
2523 ide_cdrom_update_speed(drive, buf);
2525 printk(KERN_INFO "%s: ATAPI", drive->name);
2527 /* don't print speed if the drive reported 0 */
2529 printk(KERN_CONT " %dX", cd->max_speed);
2531 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
2533 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
2534 printk(KERN_CONT " DVD%s%s",
2535 (cdi->mask & CDC_DVD_R) ? "" : "-R",
2536 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
2538 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
2539 printk(KERN_CONT " CD%s%s",
2540 (cdi->mask & CDC_CD_R) ? "" : "-R",
2541 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
2543 if ((cdi->mask & CDC_SELECT_DISC) == 0)
2544 printk(KERN_CONT " changer w/%d slots", nslots);
2546 printk(KERN_CONT " drive");
2548 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
2553 #ifdef CONFIG_IDE_PROC_FS
2554 static void ide_cdrom_add_settings(ide_drive_t *drive)
2556 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
2559 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
2563 * standard prep_rq_fn that builds 10 byte cmds
2565 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
2567 int hard_sect = queue_hardsect_size(q);
2568 long block = (long)rq->hard_sector / (hard_sect >> 9);
2569 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
2571 memset(rq->cmd, 0, sizeof(rq->cmd));
2573 if (rq_data_dir(rq) == READ)
2574 rq->cmd[0] = GPCMD_READ_10;
2576 rq->cmd[0] = GPCMD_WRITE_10;
2581 rq->cmd[2] = (block >> 24) & 0xff;
2582 rq->cmd[3] = (block >> 16) & 0xff;
2583 rq->cmd[4] = (block >> 8) & 0xff;
2584 rq->cmd[5] = block & 0xff;
2587 * and transfer length
2589 rq->cmd[7] = (blocks >> 8) & 0xff;
2590 rq->cmd[8] = blocks & 0xff;
2596 * Most of the SCSI commands are supported directly by ATAPI devices.
2597 * This transform handles the few exceptions.
2599 static int ide_cdrom_prep_pc(struct request *rq)
2604 * Transform 6-byte read/write commands to the 10-byte version
2606 if (c[0] == READ_6 || c[0] == WRITE_6) {
2613 c[0] += (READ_10 - READ_6);
2619 * it's silly to pretend we understand 6-byte sense commands, just
2620 * reject with ILLEGAL_REQUEST and the caller should take the
2621 * appropriate action
2623 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
2624 rq->errors = ILLEGAL_REQUEST;
2625 return BLKPREP_KILL;
2631 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
2633 if (blk_fs_request(rq))
2634 return ide_cdrom_prep_fs(q, rq);
2635 else if (blk_pc_request(rq))
2636 return ide_cdrom_prep_pc(rq);
2641 struct cd_list_entry {
2642 const char *id_model;
2643 const char *id_firmware;
2644 unsigned int cd_flags;
2647 static const struct cd_list_entry ide_cd_quirks_list[] = {
2648 /* Limit transfer size per interrupt. */
2649 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
2650 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
2651 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
2652 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
2653 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
2654 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
2655 IDE_CD_FLAG_PRE_ATAPI12, },
2656 /* Vertos 300, some versions of this drive like to talk BCD. */
2657 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
2658 /* Vertos 600 ESD. */
2659 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
2661 * Sanyo 3 CD changer uses a non-standard command for CD changing
2662 * (by default standard ATAPI support for CD changers is used).
2664 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
2665 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
2666 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
2667 /* Stingray 8X CD-ROM. */
2668 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
2670 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
2671 * mode sense page capabilities size, but older drives break.
2673 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
2674 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
2675 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
2676 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
2678 * Some drives used by Apple don't advertise audio play
2679 * but they do support reading TOC & audio datas.
2681 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2682 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2683 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2684 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
2688 static unsigned int ide_cd_flags(struct hd_driveid *id)
2690 const struct cd_list_entry *cle = ide_cd_quirks_list;
2692 while (cle->id_model) {
2693 if (strcmp(cle->id_model, id->model) == 0 &&
2694 (cle->id_firmware == NULL ||
2695 strstr(id->fw_rev, cle->id_firmware)))
2696 return cle->cd_flags;
2704 int ide_cdrom_setup (ide_drive_t *drive)
2706 struct cdrom_info *cd = drive->driver_data;
2707 struct cdrom_device_info *cdi = &cd->devinfo;
2708 struct hd_driveid *id = drive->id;
2711 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
2712 blk_queue_dma_alignment(drive->queue, 31);
2713 drive->queue->unplug_delay = (1 * HZ) / 1000;
2714 if (!drive->queue->unplug_delay)
2715 drive->queue->unplug_delay = 1;
2717 drive->special.all = 0;
2719 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
2722 if ((id->config & 0x0060) == 0x20)
2723 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
2725 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
2726 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
2727 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
2728 IDE_CD_FLAG_TOCADDR_AS_BCD);
2729 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
2730 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
2731 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
2732 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
2733 cdi->sanyo_slot = 3; /* 3 => use CD in slot 0 */
2735 nslots = ide_cdrom_probe_capabilities (drive);
2738 * set correct block size
2740 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
2742 if (drive->autotune == IDE_TUNE_DEFAULT ||
2743 drive->autotune == IDE_TUNE_AUTO)
2744 drive->dsc_overlap = (drive->next != drive);
2746 if (ide_cdrom_register(drive, nslots)) {
2747 printk (KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
2748 cd->devinfo.handle = NULL;
2751 ide_cdrom_add_settings(drive);
2755 #ifdef CONFIG_IDE_PROC_FS
2757 sector_t ide_cdrom_capacity (ide_drive_t *drive)
2759 unsigned long capacity, sectors_per_frame;
2761 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
2764 return capacity * sectors_per_frame;
2768 static void ide_cd_remove(ide_drive_t *drive)
2770 struct cdrom_info *info = drive->driver_data;
2772 ide_proc_unregister_driver(drive, info->driver);
2774 del_gendisk(info->disk);
2779 static void ide_cd_release(struct kref *kref)
2781 struct cdrom_info *info = to_ide_cd(kref);
2782 struct cdrom_device_info *devinfo = &info->devinfo;
2783 ide_drive_t *drive = info->drive;
2784 struct gendisk *g = info->disk;
2786 kfree(info->buffer);
2788 if (devinfo->handle == drive && unregister_cdrom(devinfo))
2789 printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
2790 "driver.\n", __FUNCTION__, drive->name);
2791 drive->dsc_overlap = 0;
2792 drive->driver_data = NULL;
2793 blk_queue_prep_rq(drive->queue, NULL);
2794 g->private_data = NULL;
2799 static int ide_cd_probe(ide_drive_t *);
2801 #ifdef CONFIG_IDE_PROC_FS
2802 static int proc_idecd_read_capacity
2803 (char *page, char **start, off_t off, int count, int *eof, void *data)
2805 ide_drive_t *drive = data;
2808 len = sprintf(page,"%llu\n", (long long)ide_cdrom_capacity(drive));
2809 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
2812 static ide_proc_entry_t idecd_proc[] = {
2813 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
2814 { NULL, 0, NULL, NULL }
2818 static ide_driver_t ide_cdrom_driver = {
2820 .owner = THIS_MODULE,
2821 .name = "ide-cdrom",
2822 .bus = &ide_bus_type,
2824 .probe = ide_cd_probe,
2825 .remove = ide_cd_remove,
2826 .version = IDECD_VERSION,
2828 .supports_dsc_overlap = 1,
2829 .do_request = ide_do_rw_cdrom,
2830 .end_request = ide_end_request,
2831 .error = __ide_error,
2832 .abort = __ide_abort,
2833 #ifdef CONFIG_IDE_PROC_FS
2838 static int idecd_open(struct inode * inode, struct file * file)
2840 struct gendisk *disk = inode->i_bdev->bd_disk;
2841 struct cdrom_info *info;
2844 if (!(info = ide_cd_get(disk)))
2848 info->buffer = kmalloc(SECTOR_BUFFER_SIZE, GFP_KERNEL|__GFP_REPEAT);
2851 rc = cdrom_open(&info->devinfo, inode, file);
2859 static int idecd_release(struct inode * inode, struct file * file)
2861 struct gendisk *disk = inode->i_bdev->bd_disk;
2862 struct cdrom_info *info = ide_cd_g(disk);
2864 cdrom_release (&info->devinfo, file);
2871 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2873 struct packet_command cgc;
2878 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2881 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2883 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2887 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2888 return cdrom_mode_select(cdi, &cgc);
2891 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2893 struct packet_command cgc;
2898 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2900 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2904 spindown = buffer[11] & 0x0f;
2905 if (copy_to_user((void __user *)arg, &spindown, sizeof (char)))
2910 static int idecd_ioctl (struct inode *inode, struct file *file,
2911 unsigned int cmd, unsigned long arg)
2913 struct block_device *bdev = inode->i_bdev;
2914 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2918 case CDROMSETSPINDOWN:
2919 return idecd_set_spindown(&info->devinfo, arg);
2920 case CDROMGETSPINDOWN:
2921 return idecd_get_spindown(&info->devinfo, arg);
2926 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2928 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2933 static int idecd_media_changed(struct gendisk *disk)
2935 struct cdrom_info *info = ide_cd_g(disk);
2936 return cdrom_media_changed(&info->devinfo);
2939 static int idecd_revalidate_disk(struct gendisk *disk)
2941 struct cdrom_info *info = ide_cd_g(disk);
2942 struct request_sense sense;
2944 ide_cd_read_toc(info->drive, &sense);
2949 static struct block_device_operations idecd_ops = {
2950 .owner = THIS_MODULE,
2952 .release = idecd_release,
2953 .ioctl = idecd_ioctl,
2954 .media_changed = idecd_media_changed,
2955 .revalidate_disk= idecd_revalidate_disk
2959 static char *ignore = NULL;
2961 module_param(ignore, charp, 0400);
2962 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2964 static int ide_cd_probe(ide_drive_t *drive)
2966 struct cdrom_info *info;
2968 struct request_sense sense;
2970 if (!strstr("ide-cdrom", drive->driver_req))
2972 if (!drive->present)
2974 if (drive->media != ide_cdrom && drive->media != ide_optical)
2976 /* skip drives that we were told to ignore */
2977 if (ignore != NULL) {
2978 if (strstr(ignore, drive->name)) {
2979 printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
2984 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
2987 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2989 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
2993 g = alloc_disk(1 << PARTN_BITS);
2997 ide_init_disk(g, drive);
2999 ide_proc_register_driver(drive, &ide_cdrom_driver);
3001 kref_init(&info->kref);
3003 info->drive = drive;
3004 info->driver = &ide_cdrom_driver;
3007 g->private_data = &info->driver;
3009 drive->driver_data = info;
3012 g->driverfs_dev = &drive->gendev;
3013 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
3014 if (ide_cdrom_setup(drive)) {
3015 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
3016 ide_cd_release(&info->kref);
3020 ide_cd_read_toc(drive, &sense);
3021 g->fops = &idecd_ops;
3022 g->flags |= GENHD_FL_REMOVABLE;
3032 static void __exit ide_cdrom_exit(void)
3034 driver_unregister(&ide_cdrom_driver.gen_driver);
3037 static int __init ide_cdrom_init(void)
3039 return driver_register(&ide_cdrom_driver.gen_driver);
3042 MODULE_ALIAS("ide:*m-cdrom*");
3043 MODULE_ALIAS("ide-cd");
3044 module_init(ide_cdrom_init);
3045 module_exit(ide_cdrom_exit);
3046 MODULE_LICENSE("GPL");