4 * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
7 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
9 * May be copied or modified under the terms of the GNU General Public
10 * License. See linux/COPYING for more information.
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 * For historical changelog please see:
23 * Documentation/ide/ChangeLog.ide-cd.1994-2004
26 #define IDECD_VERSION "5.00"
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
45 #include <linux/irq.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
53 static DEFINE_MUTEX(idecd_ref_mutex);
55 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
57 #define ide_cd_g(disk) \
58 container_of((disk)->private_data, struct cdrom_info, driver)
60 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
62 struct cdrom_info *cd = NULL;
64 mutex_lock(&idecd_ref_mutex);
68 mutex_unlock(&idecd_ref_mutex);
72 static void ide_cd_release(struct kref *);
74 static void ide_cd_put(struct cdrom_info *cd)
76 mutex_lock(&idecd_ref_mutex);
77 kref_put(&cd->kref, ide_cd_release);
78 mutex_unlock(&idecd_ref_mutex);
82 * Generic packet command support and error handling routines.
85 /* Mark that we've seen a media change and invalidate our internal buffers. */
86 static void cdrom_saw_media_change(ide_drive_t *drive)
88 struct cdrom_info *cd = drive->driver_data;
90 cd->cd_flags |= IDE_CD_FLAG_MEDIA_CHANGED;
91 cd->cd_flags &= ~IDE_CD_FLAG_TOC_VALID;
94 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
95 struct request_sense *sense)
99 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
102 switch (sense->sense_key) {
104 case RECOVERED_ERROR:
108 * don't care about tray state messages for e.g. capacity
109 * commands or in-progress or becoming ready
111 if (sense->asc == 0x3a || sense->asc == 0x04)
115 case ILLEGAL_REQUEST:
117 * don't log START_STOP unit with LoEj set, since we cannot
118 * reliably check if drive can auto-close
120 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126 * Make good and sure we've seen this potential media change.
127 * Some drives (i.e. Creative) fail to present the correct sense
128 * key in the error register.
130 cdrom_saw_media_change(drive);
140 void cdrom_analyze_sense_data(ide_drive_t *drive,
141 struct request *failed_command,
142 struct request_sense *sense)
144 unsigned long sector;
145 unsigned long bio_sectors;
147 struct cdrom_info *info = drive->driver_data;
149 if (!cdrom_log_sense(drive, failed_command, sense))
153 * If a read toc is executed for a CD-R or CD-RW medium where the first
154 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
157 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
158 if (sense->sense_key == 0x05 && sense->asc == 0x24)
162 if (sense->error_code == 0x70) {
163 switch (sense->sense_key) {
165 case VOLUME_OVERFLOW:
166 case ILLEGAL_REQUEST:
169 if (failed_command == NULL ||
170 !blk_fs_request(failed_command))
172 sector = (sense->information[0] << 24) |
173 (sense->information[1] << 16) |
174 (sense->information[2] << 8) |
175 (sense->information[3]);
177 bio_sectors = bio_sectors(failed_command->bio);
180 if (drive->queue->hardsect_size == 2048)
181 /* device sector size is 2K */
183 sector &= ~(bio_sectors - 1);
184 valid = (sector - failed_command->sector) << 9;
188 if (sector < get_capacity(info->disk) &&
189 drive->probed_capacity - sector < 4 * 75) {
190 set_capacity(info->disk, sector);
195 ide_cd_log_error(drive->name, failed_command, sense);
198 /* Initialize a ide-cd packet command request */
199 void ide_cd_init_rq(ide_drive_t *drive, struct request *rq)
201 struct cdrom_info *cd = drive->driver_data;
203 ide_init_drive_cmd(rq);
204 rq->cmd_type = REQ_TYPE_ATA_PC;
205 rq->rq_disk = cd->disk;
208 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
209 struct request *failed_command)
211 struct cdrom_info *info = drive->driver_data;
212 struct request *rq = &info->request_sense_request;
215 sense = &info->sense_data;
217 /* stuff the sense request in front of our current request */
218 ide_cd_init_rq(drive, rq);
221 rq->cmd[0] = GPCMD_REQUEST_SENSE;
222 rq->cmd[4] = rq->data_len = 18;
224 rq->cmd_type = REQ_TYPE_SENSE;
226 /* NOTE! Save the failed command in "rq->buffer" */
227 rq->buffer = (void *) failed_command;
229 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
232 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
234 struct request *rq = HWGROUP(drive)->rq;
235 int nsectors = rq->hard_cur_sectors;
237 if (blk_sense_request(rq) && uptodate) {
239 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
242 struct request *failed = (struct request *) rq->buffer;
243 struct cdrom_info *info = drive->driver_data;
244 void *sense = &info->sense_data;
249 sense = failed->sense;
250 failed->sense_len = rq->sense_len;
252 cdrom_analyze_sense_data(drive, failed, sense);
254 * now end the failed request
256 if (blk_fs_request(failed)) {
257 if (ide_end_dequeued_request(drive, failed, 0,
258 failed->hard_nr_sectors))
261 spin_lock_irqsave(&ide_lock, flags);
262 if (__blk_end_request(failed, -EIO,
265 spin_unlock_irqrestore(&ide_lock, flags);
268 cdrom_analyze_sense_data(drive, NULL, sense);
271 if (!rq->current_nr_sectors && blk_fs_request(rq))
273 /* make sure it's fully ended */
274 if (blk_pc_request(rq))
275 nsectors = (rq->data_len + 511) >> 9;
279 ide_end_request(drive, uptodate, nsectors);
282 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 stat)
286 ide_dump_status(drive, msg, stat);
291 * 0: if the request should be continued.
292 * 1: if the request was ended.
294 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
296 struct request *rq = HWGROUP(drive)->rq;
297 int stat, err, sense_key;
299 /* check for errors */
300 stat = ide_read_status(drive);
305 if (OK_STAT(stat, good_stat, BAD_R_STAT))
308 /* get the IDE error register */
309 err = ide_read_error(drive);
310 sense_key = err >> 4;
313 printk("%s: missing rq in cdrom_decode_status\n", drive->name);
317 if (blk_sense_request(rq)) {
319 * We got an error trying to get sense info from the drive
320 * (probably while trying to recover from a former error).
323 rq->cmd_flags |= REQ_FAILED;
324 cdrom_end_request(drive, 0);
325 ide_error(drive, "request sense failure", stat);
328 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
329 /* All other functions, except for READ. */
332 * if we have an error, pass back CHECK_CONDITION as the
335 if (blk_pc_request(rq) && !rq->errors)
336 rq->errors = SAM_STAT_CHECK_CONDITION;
338 /* check for tray open */
339 if (sense_key == NOT_READY) {
340 cdrom_saw_media_change(drive);
341 } else if (sense_key == UNIT_ATTENTION) {
342 /* check for media change */
343 cdrom_saw_media_change(drive);
345 } else if (sense_key == ILLEGAL_REQUEST &&
346 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
348 * Don't print error message for this condition--
349 * SFF8090i indicates that 5/24/00 is the correct
350 * response to a request to close the tray if the
351 * drive doesn't have that capability.
352 * cdrom_log_sense() knows this!
354 } else if (!(rq->cmd_flags & REQ_QUIET)) {
355 /* otherwise, print an error */
356 ide_dump_status(drive, "packet command error", stat);
359 rq->cmd_flags |= REQ_FAILED;
362 * instead of playing games with moving completions around,
363 * remove failed request completely and end it when the
364 * request sense has completed
368 } else if (blk_fs_request(rq)) {
369 int do_end_request = 0;
371 /* handle errors from READ and WRITE requests */
373 if (blk_noretry_request(rq))
376 if (sense_key == NOT_READY) {
378 if (rq_data_dir(rq) == READ) {
379 cdrom_saw_media_change(drive);
381 /* fail the request */
382 printk("%s: tray open\n", drive->name);
385 struct cdrom_info *info = drive->driver_data;
388 * Allow the drive 5 seconds to recover, some
389 * devices will return this error while flushing
393 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
395 if (time_after(jiffies, info->write_timeout))
401 * take a breather relying on the unplug
402 * timer to kick us again
404 spin_lock_irqsave(&ide_lock, flags);
405 blk_plug_device(drive->queue);
406 spin_unlock_irqrestore(&ide_lock, flags);
410 } else if (sense_key == UNIT_ATTENTION) {
412 cdrom_saw_media_change (drive);
415 * Arrange to retry the request but be sure to give up
416 * if we've retried too many times.
418 if (++rq->errors > ERROR_MAX)
420 } else if (sense_key == ILLEGAL_REQUEST ||
421 sense_key == DATA_PROTECT) {
423 * No point in retrying after an illegal request or data
426 ide_dump_status_no_sense(drive, "command error", stat);
428 } else if (sense_key == MEDIUM_ERROR) {
430 * No point in re-trying a zillion times on a bad
431 * sector. If we got here the error is not correctable.
433 ide_dump_status_no_sense(drive, "media error (bad sector)", stat);
435 } else if (sense_key == BLANK_CHECK) {
436 /* disk appears blank ?? */
437 ide_dump_status_no_sense(drive, "media error (blank)", stat);
439 } else if ((err & ~ABRT_ERR) != 0) {
440 /* go to the default handler for other errors */
441 ide_error(drive, "cdrom_decode_status", stat);
443 } else if ((++rq->errors > ERROR_MAX)) {
444 /* we've racked up too many retries, abort */
449 * End a request through request sense analysis when we have
450 * sense data. We need this in order to perform end of media
457 * If we got a CHECK_CONDITION status, queue
458 * a request sense command.
461 cdrom_queue_request_sense(drive, NULL, NULL);
463 blk_dump_rq_flags(rq, "ide-cd: bad rq");
464 cdrom_end_request(drive, 0);
467 /* retry, or handle the next request */
471 if (stat & ERR_STAT) {
474 spin_lock_irqsave(&ide_lock, flags);
475 blkdev_dequeue_request(rq);
476 HWGROUP(drive)->rq = NULL;
477 spin_unlock_irqrestore(&ide_lock, flags);
479 cdrom_queue_request_sense(drive, rq->sense, rq);
481 cdrom_end_request(drive, 0);
486 static int cdrom_timer_expiry(ide_drive_t *drive)
488 struct request *rq = HWGROUP(drive)->rq;
489 unsigned long wait = 0;
492 * Some commands are *slow* and normally take a long time to complete.
493 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
494 * commands/drives support that. Let ide_timer_expiry keep polling us
497 switch (rq->cmd[0]) {
499 case GPCMD_FORMAT_UNIT:
500 case GPCMD_RESERVE_RZONE_TRACK:
501 case GPCMD_CLOSE_TRACK:
502 case GPCMD_FLUSH_CACHE:
503 wait = ATAPI_WAIT_PC;
506 if (!(rq->cmd_flags & REQ_QUIET))
507 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,
556 hwif->io_ports[IDE_COMMAND_OFFSET]);
558 spin_unlock_irqrestore(&ide_lock, flags);
560 return (*handler) (drive);
565 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
566 * registers must have already been prepared by cdrom_start_packet_command.
567 * HANDLER is the interrupt handler to call when the command completes or
568 * there's data ready.
570 #define ATAPI_MIN_CDB_BYTES 12
571 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
573 ide_handler_t *handler)
575 ide_hwif_t *hwif = drive->hwif;
577 struct cdrom_info *info = drive->driver_data;
578 ide_startstop_t startstop;
580 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
582 * Here we should have been called after receiving an interrupt
583 * from the device. DRQ should how be set.
586 /* check for errors */
587 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
590 /* ok, next interrupt will be DMA interrupt */
592 drive->waiting_for_dma = 1;
594 /* otherwise, we must wait for DRQ to get set */
595 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
596 BUSY_STAT, WAIT_READY))
600 /* arm the interrupt handler */
601 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
603 /* ATAPI commands get padded out to 12 bytes minimum */
604 cmd_len = COMMAND_SIZE(rq->cmd[0]);
605 if (cmd_len < ATAPI_MIN_CDB_BYTES)
606 cmd_len = ATAPI_MIN_CDB_BYTES;
608 /* send the command to the device */
609 HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
611 /* start the DMA if need be */
613 hwif->dma_start(drive);
619 * Block read functions.
621 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
625 xf(drive, &dum, sizeof(dum));
630 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
633 static char dum[SECTOR_SIZE];
635 drive->hwif->atapi_input_bytes(drive, dum, sizeof(dum));
641 * Check the contents of the interrupt reason register from the cdrom
642 * and attempt to recover if there are problems. Returns 0 if everything's
643 * ok; nonzero if the request has been terminated.
645 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
646 int len, int ireason, int rw)
649 * ireason == 0: the drive wants to receive data from us
650 * ireason == 2: the drive is expecting to transfer data to us
652 if (ireason == (!rw << 1))
654 else if (ireason == (rw << 1)) {
655 ide_hwif_t *hwif = drive->hwif;
659 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
660 drive->name, __func__);
662 xf = rw ? hwif->atapi_output_bytes : hwif->atapi_input_bytes;
663 ide_cd_pad_transfer(drive, xf, len);
664 } else if (rw == 0 && ireason == 1) {
666 * Some drives (ASUS) seem to tell us that status info is
667 * available. Just get it and ignore.
669 (void)ide_read_status(drive);
672 /* drive wants a command packet, or invalid ireason... */
673 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
674 drive->name, __func__, ireason);
677 if (rq->cmd_type == REQ_TYPE_ATA_PC)
678 rq->cmd_flags |= REQ_FAILED;
680 cdrom_end_request(drive, 0);
685 * Assume that the drive will always provide data in multiples of at least
686 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
688 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
690 struct cdrom_info *cd = drive->driver_data;
692 if ((len % SECTOR_SIZE) == 0)
695 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
696 drive->name, __func__, len);
698 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
699 printk(KERN_ERR " This drive is not supported by "
700 "this version of the driver\n");
702 printk(KERN_ERR " Trying to limit transfer sizes\n");
703 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
709 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
712 * Routine to send a read/write packet command to the drive. This is usually
713 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
714 * devices, it is called from an interrupt when the drive is ready to accept
717 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
719 struct request *rq = HWGROUP(drive)->rq;
721 if (rq_data_dir(rq) == READ) {
722 unsigned short sectors_per_frame =
723 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
724 int nskip = rq->sector & (sectors_per_frame - 1);
727 * If the requested sector doesn't start on a frame boundary,
728 * we must adjust the start of the transfer so that it does,
729 * and remember to skip the first few sectors.
731 * If the rq->current_nr_sectors field is larger than the size
732 * of the buffer, it will mean that we're to skip a number of
733 * sectors equal to the amount by which rq->current_nr_sectors
734 * is larger than the buffer size.
737 /* sanity check... */
738 if (rq->current_nr_sectors !=
739 bio_cur_sectors(rq->bio)) {
740 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
741 drive->name, __func__,
742 rq->current_nr_sectors);
743 cdrom_end_request(drive, 0);
746 rq->current_nr_sectors += nskip;
751 /* the immediate bit */
754 /* set up the command */
755 rq->timeout = ATAPI_WAIT_PC;
757 /* send the command to the drive and return */
758 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
761 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
762 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
763 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
765 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
767 struct cdrom_info *info = drive->driver_data;
769 static int retry = 10;
771 if (cdrom_decode_status(drive, 0, &stat))
774 info->cd_flags |= IDE_CD_FLAG_SEEKING;
776 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
778 drive->dsc_overlap = 0;
783 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
785 struct request *rq = HWGROUP(drive)->rq;
786 sector_t frame = rq->sector;
788 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
790 memset(rq->cmd, 0, sizeof(rq->cmd));
791 rq->cmd[0] = GPCMD_SEEK;
792 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
794 rq->timeout = ATAPI_WAIT_PC;
795 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
798 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
800 struct cdrom_info *info = drive->driver_data;
803 info->start_seek = jiffies;
804 return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation);
808 * Fix up a possibly partially-processed request so that we can start it over
809 * entirely, or even put it back on the request queue.
811 static void restore_request(struct request *rq)
813 if (rq->buffer != bio_data(rq->bio)) {
814 sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE;
816 rq->buffer = bio_data(rq->bio);
820 rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio);
821 rq->hard_nr_sectors = rq->nr_sectors;
822 rq->hard_sector = rq->sector;
823 rq->q->prep_rq_fn(rq->q, rq);
827 * All other packet commands.
829 static void ide_cd_request_sense_fixup(struct request *rq)
832 * Some of the trailing request sense fields are optional,
833 * and some drives don't send them. Sigh.
835 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
836 rq->data_len > 0 && rq->data_len <= 5)
837 while (rq->data_len > 0) {
838 *(u8 *)rq->data++ = 0;
843 int ide_cd_queue_pc(ide_drive_t *drive, struct request *rq)
845 struct request_sense sense;
847 unsigned int flags = rq->cmd_flags;
849 if (rq->sense == NULL)
852 /* start of retry loop */
855 unsigned long time = jiffies;
856 rq->cmd_flags = flags;
858 error = ide_do_drive_cmd(drive, rq, ide_wait);
859 time = jiffies - time;
862 * FIXME: we should probably abort/retry or something in case of
865 if (rq->cmd_flags & REQ_FAILED) {
867 * The request failed. Retry if it was due to a unit
868 * attention status (usually means media was changed).
870 struct request_sense *reqbuf = rq->sense;
872 if (reqbuf->sense_key == UNIT_ATTENTION)
873 cdrom_saw_media_change(drive);
874 else if (reqbuf->sense_key == NOT_READY &&
875 reqbuf->asc == 4 && reqbuf->ascq != 4) {
877 * The drive is in the process of loading
878 * a disk. Retry, but wait a little to give
879 * the drive time to complete the load.
883 /* otherwise, don't retry */
889 /* end of retry loop */
890 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
892 /* return an error if the command failed */
893 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
897 * Called from blk_end_request_callback() after the data of the request is
898 * completed and before the request itself is completed. By returning value '1',
899 * blk_end_request_callback() returns immediately without completing it.
901 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
906 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
908 ide_hwif_t *hwif = drive->hwif;
909 struct cdrom_info *info = drive->driver_data;
910 struct request *rq = HWGROUP(drive)->rq;
911 xfer_func_t *xferfunc;
912 ide_expiry_t *expiry = NULL;
913 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
914 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
915 unsigned int timeout;
918 /* check for errors */
922 dma_error = HWIF(drive)->ide_dma_end(drive);
924 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
925 write ? "write" : "read");
930 if (cdrom_decode_status(drive, 0, &stat))
933 /* using dma, transfer is complete now */
936 return ide_error(drive, "dma error", stat);
937 if (blk_fs_request(rq)) {
938 ide_end_request(drive, 1, rq->nr_sectors);
944 /* ok we fall to pio :/ */
945 ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]) & 0x3;
946 lowcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
947 highcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]);
949 len = lowcyl + (256 * highcyl);
951 thislen = blk_fs_request(rq) ? len : rq->data_len;
955 /* If DRQ is clear, the command has completed. */
956 if ((stat & DRQ_STAT) == 0) {
957 if (blk_fs_request(rq)) {
959 * If we're not done reading/writing, complain.
960 * Otherwise, complete the command normally.
963 if (rq->current_nr_sectors > 0) {
964 printk(KERN_ERR "%s: %s: data underrun "
966 drive->name, __func__,
967 rq->current_nr_sectors);
969 rq->cmd_flags |= REQ_FAILED;
972 cdrom_end_request(drive, uptodate);
974 } else if (!blk_pc_request(rq)) {
975 ide_cd_request_sense_fixup(rq);
976 /* complain if we still have data left to transfer */
977 uptodate = rq->data_len ? 0 : 1;
982 /* check which way to transfer data */
983 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
986 if (blk_fs_request(rq)) {
990 if (ide_cd_check_transfer_size(drive, len)) {
991 cdrom_end_request(drive, 0);
996 * First, figure out if we need to bit-bucket
997 * any of the leading sectors.
999 nskip = min_t(int, rq->current_nr_sectors
1000 - bio_cur_sectors(rq->bio),
1003 ide_cd_drain_data(drive, nskip);
1004 rq->current_nr_sectors -= nskip;
1005 thislen -= (nskip << 9);
1012 xferfunc = HWIF(drive)->atapi_output_bytes;
1015 xferfunc = HWIF(drive)->atapi_input_bytes;
1019 while (thislen > 0) {
1020 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1021 int blen = rq->data_len;
1025 if (blk_fs_request(rq)) {
1027 blen = rq->current_nr_sectors << 9;
1029 ptr = bio_data(rq->bio);
1030 blen = bio_iovec(rq->bio)->bv_len;
1035 if (blk_fs_request(rq) && !write)
1037 * If the buffers are full, pipe the rest into
1040 ide_cd_drain_data(drive, thislen >> 9);
1042 printk(KERN_ERR "%s: confused, missing data\n",
1044 blk_dump_rq_flags(rq, rq_data_dir(rq)
1045 ? "cdrom_newpc_intr, write"
1046 : "cdrom_newpc_intr, read");
1054 xferfunc(drive, ptr, blen);
1059 if (blk_fs_request(rq)) {
1061 rq->nr_sectors -= (blen >> 9);
1062 rq->current_nr_sectors -= (blen >> 9);
1063 rq->sector += (blen >> 9);
1065 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1066 cdrom_end_request(drive, 1);
1068 rq->data_len -= blen;
1071 * The request can't be completed until DRQ is cleared.
1072 * So complete the data, but don't complete the request
1073 * using the dummy function for the callback feature
1074 * of blk_end_request_callback().
1077 blk_end_request_callback(rq, 0, blen,
1078 cdrom_newpc_intr_dummy_cb);
1082 if (!write && blk_sense_request(rq))
1083 rq->sense_len += blen;
1086 /* pad, if necessary */
1087 if (!blk_fs_request(rq) && len > 0)
1088 ide_cd_pad_transfer(drive, xferfunc, len);
1090 if (blk_pc_request(rq)) {
1091 timeout = rq->timeout;
1093 timeout = ATAPI_WAIT_PC;
1094 if (!blk_fs_request(rq))
1095 expiry = cdrom_timer_expiry;
1098 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1102 if (blk_pc_request(rq)) {
1103 unsigned long flags;
1104 unsigned int dlen = rq->data_len;
1109 spin_lock_irqsave(&ide_lock, flags);
1110 if (__blk_end_request(rq, 0, dlen))
1112 HWGROUP(drive)->rq = NULL;
1113 spin_unlock_irqrestore(&ide_lock, flags);
1116 rq->cmd_flags |= REQ_FAILED;
1117 cdrom_end_request(drive, uptodate);
1122 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1124 struct cdrom_info *cd = drive->driver_data;
1125 int write = rq_data_dir(rq) == WRITE;
1126 unsigned short sectors_per_frame =
1127 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1130 /* disk has become write protected */
1131 if (cd->disk->policy) {
1132 cdrom_end_request(drive, 0);
1137 * We may be retrying this request after an error. Fix up any
1138 * weirdness which might be present in the request packet.
1140 restore_request(rq);
1143 /* use DMA, if possible / writes *must* be hardware frame aligned */
1144 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1145 (rq->sector & (sectors_per_frame - 1))) {
1147 cdrom_end_request(drive, 0);
1152 cd->dma = drive->using_dma;
1155 cd->devinfo.media_written = 1;
1157 /* start sending the read/write request to the drive */
1158 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1161 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1163 struct request *rq = HWGROUP(drive)->rq;
1166 rq->timeout = ATAPI_WAIT_PC;
1168 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1171 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1173 struct cdrom_info *info = drive->driver_data;
1175 if (blk_pc_request(rq))
1176 rq->cmd_flags |= REQ_QUIET;
1178 rq->cmd_flags &= ~REQ_FAILED;
1184 int mask = drive->queue->dma_alignment;
1185 unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
1187 info->dma = drive->using_dma;
1190 * check if dma is safe
1192 * NOTE! The "len" and "addr" checks should possibly have
1195 if ((rq->data_len & 15) || (addr & mask))
1199 /* start sending the command to the drive */
1200 return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
1204 * cdrom driver request routine.
1206 static ide_startstop_t
1207 ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq, sector_t block)
1209 ide_startstop_t action;
1210 struct cdrom_info *info = drive->driver_data;
1212 if (blk_fs_request(rq)) {
1213 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1214 unsigned long elapsed = jiffies - info->start_seek;
1215 int stat = ide_read_status(drive);
1217 if ((stat & SEEK_STAT) != SEEK_STAT) {
1218 if (elapsed < IDECD_SEEK_TIMEOUT) {
1219 ide_stall_queue(drive, IDECD_SEEK_TIMER);
1222 printk(KERN_ERR "%s: DSC timeout\n", drive->name);
1224 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1226 if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap)
1227 action = cdrom_start_seek(drive, block);
1229 action = cdrom_start_rw(drive, rq);
1230 info->last_block = block;
1232 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1233 rq->cmd_type == REQ_TYPE_ATA_PC) {
1234 return cdrom_do_block_pc(drive, rq);
1235 } else if (blk_special_request(rq)) {
1236 /* right now this can only be a reset... */
1237 cdrom_end_request(drive, 1);
1241 blk_dump_rq_flags(rq, "ide-cd bad flags");
1242 cdrom_end_request(drive, 0);
1251 * Routines which queue packet commands take as a final argument a pointer to a
1252 * request_sense struct. If execution of the command results in an error with a
1253 * CHECK CONDITION status, this structure will be filled with the results of the
1254 * subsequent request sense command. The pointer can also be NULL, in which case
1255 * no sense information is returned.
1258 void msf_from_bcd(struct atapi_msf *msf)
1260 msf->minute = BCD2BIN(msf->minute);
1261 msf->second = BCD2BIN(msf->second);
1262 msf->frame = BCD2BIN(msf->frame);
1265 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1268 struct cdrom_info *info = drive->driver_data;
1269 struct cdrom_device_info *cdi = &info->devinfo;
1271 ide_cd_init_rq(drive, &req);
1274 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1275 req.cmd_flags |= REQ_QUIET;
1278 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1279 * instead of supporting the LOAD_UNLOAD opcode.
1281 req.cmd[7] = cdi->sanyo_slot % 3;
1283 return ide_cd_queue_pc(drive, &req);
1286 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1287 unsigned long *sectors_per_frame,
1288 struct request_sense *sense)
1298 ide_cd_init_rq(drive, &req);
1301 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1302 req.data = (char *)&capbuf;
1303 req.data_len = sizeof(capbuf);
1304 req.cmd_flags |= REQ_QUIET;
1306 stat = ide_cd_queue_pc(drive, &req);
1308 *capacity = 1 + be32_to_cpu(capbuf.lba);
1309 *sectors_per_frame =
1310 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1316 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1317 int format, char *buf, int buflen,
1318 struct request_sense *sense)
1322 ide_cd_init_rq(drive, &req);
1326 req.data_len = buflen;
1327 req.cmd_flags |= REQ_QUIET;
1328 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1329 req.cmd[6] = trackno;
1330 req.cmd[7] = (buflen >> 8);
1331 req.cmd[8] = (buflen & 0xff);
1332 req.cmd[9] = (format << 6);
1337 return ide_cd_queue_pc(drive, &req);
1340 /* Try to read the entire TOC for the disk into our internal buffer. */
1341 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1343 int stat, ntracks, i;
1344 struct cdrom_info *info = drive->driver_data;
1345 struct cdrom_device_info *cdi = &info->devinfo;
1346 struct atapi_toc *toc = info->toc;
1348 struct atapi_toc_header hdr;
1349 struct atapi_toc_entry ent;
1352 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1355 /* try to allocate space */
1356 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1358 printk(KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
1365 * Check to see if the existing data is still valid. If it is,
1368 (void) cdrom_check_status(drive, sense);
1370 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1373 /* try to get the total cdrom capacity and sector size */
1374 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
1377 toc->capacity = 0x1fffff;
1379 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1380 /* save a private copy of the TOC capacity for error handling */
1381 drive->probed_capacity = toc->capacity * sectors_per_frame;
1383 blk_queue_hardsect_size(drive->queue,
1384 sectors_per_frame << SECTOR_BITS);
1386 /* first read just the header, so we know how long the TOC is */
1387 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1388 sizeof(struct atapi_toc_header), sense);
1392 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1393 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1394 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1397 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1400 if (ntracks > MAX_TRACKS)
1401 ntracks = MAX_TRACKS;
1403 /* now read the whole schmeer */
1404 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1406 sizeof(struct atapi_toc_header) +
1408 sizeof(struct atapi_toc_entry), sense);
1410 if (stat && toc->hdr.first_track > 1) {
1412 * Cds with CDI tracks only don't have any TOC entries, despite
1413 * of this the returned values are
1414 * first_track == last_track = number of CDI tracks + 1,
1415 * so that this case is indistinguishable from the same layout
1416 * plus an additional audio track. If we get an error for the
1417 * regular case, we assume a CDI without additional audio
1418 * tracks. In this case the readable TOC is empty (CDI tracks
1419 * are not included) and only holds the Leadout entry.
1424 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1426 sizeof(struct atapi_toc_header) +
1428 sizeof(struct atapi_toc_entry),
1433 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1434 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1435 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1437 toc->hdr.first_track = CDROM_LEADOUT;
1438 toc->hdr.last_track = CDROM_LEADOUT;
1445 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1447 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1448 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1449 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1452 for (i = 0; i <= ntracks; i++) {
1453 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1454 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1455 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1456 msf_from_bcd(&toc->ent[i].addr.msf);
1458 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1459 toc->ent[i].addr.msf.second,
1460 toc->ent[i].addr.msf.frame);
1463 if (toc->hdr.first_track != CDROM_LEADOUT) {
1464 /* read the multisession information */
1465 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1466 sizeof(ms_tmp), sense);
1470 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1472 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
1473 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1476 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1477 /* re-read multisession information using MSF format */
1478 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1479 sizeof(ms_tmp), sense);
1483 msf_from_bcd(&ms_tmp.ent.addr.msf);
1484 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1485 ms_tmp.ent.addr.msf.second,
1486 ms_tmp.ent.addr.msf.frame);
1489 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1491 /* now try to get the total cdrom capacity */
1492 stat = cdrom_get_last_written(cdi, &last_written);
1493 if (!stat && (last_written > toc->capacity)) {
1494 toc->capacity = last_written;
1495 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1496 drive->probed_capacity = toc->capacity * sectors_per_frame;
1499 /* Remember that we've read this stuff. */
1500 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1505 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1507 struct cdrom_info *info = drive->driver_data;
1508 struct cdrom_device_info *cdi = &info->devinfo;
1509 struct packet_command cgc;
1510 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1512 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1513 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1515 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1517 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1518 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1521 } while (--attempts);
1525 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1527 struct cdrom_info *cd = drive->driver_data;
1528 u16 curspeed, maxspeed;
1530 curspeed = *(u16 *)&buf[8 + 14];
1531 maxspeed = *(u16 *)&buf[8 + 8];
1533 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1534 curspeed = le16_to_cpu(curspeed);
1535 maxspeed = le16_to_cpu(maxspeed);
1537 curspeed = be16_to_cpu(curspeed);
1538 maxspeed = be16_to_cpu(maxspeed);
1541 cd->current_speed = (curspeed + (176/2)) / 176;
1542 cd->max_speed = (maxspeed + (176/2)) / 176;
1545 #define IDE_CD_CAPABILITIES \
1546 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1547 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1548 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1549 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1550 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1552 static struct cdrom_device_ops ide_cdrom_dops = {
1553 .open = ide_cdrom_open_real,
1554 .release = ide_cdrom_release_real,
1555 .drive_status = ide_cdrom_drive_status,
1556 .media_changed = ide_cdrom_check_media_change_real,
1557 .tray_move = ide_cdrom_tray_move,
1558 .lock_door = ide_cdrom_lock_door,
1559 .select_speed = ide_cdrom_select_speed,
1560 .get_last_session = ide_cdrom_get_last_session,
1561 .get_mcn = ide_cdrom_get_mcn,
1562 .reset = ide_cdrom_reset,
1563 .audio_ioctl = ide_cdrom_audio_ioctl,
1564 .capability = IDE_CD_CAPABILITIES,
1565 .generic_packet = ide_cdrom_packet,
1568 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1570 struct cdrom_info *info = drive->driver_data;
1571 struct cdrom_device_info *devinfo = &info->devinfo;
1573 devinfo->ops = &ide_cdrom_dops;
1574 devinfo->speed = info->current_speed;
1575 devinfo->capacity = nslots;
1576 devinfo->handle = drive;
1577 strcpy(devinfo->name, drive->name);
1579 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1580 devinfo->mask |= CDC_SELECT_SPEED;
1582 devinfo->disk = info->disk;
1583 return register_cdrom(devinfo);
1587 int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1589 struct cdrom_info *cd = drive->driver_data;
1590 struct cdrom_device_info *cdi = &cd->devinfo;
1591 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1592 mechtype_t mechtype;
1595 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1596 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1597 CDC_MO_DRIVE | CDC_RAM);
1599 if (drive->media == ide_optical) {
1600 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1601 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
1605 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1606 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1607 cdi->mask &= ~CDC_PLAY_AUDIO;
1612 * We have to cheat a little here. the packet will eventually be queued
1613 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1614 * Since this device hasn't been registered with the Uniform layer yet,
1615 * it can't do this. Same goes for cdi->ops.
1617 cdi->handle = drive;
1618 cdi->ops = &ide_cdrom_dops;
1620 if (ide_cdrom_get_capabilities(drive, buf))
1623 if ((buf[8 + 6] & 0x01) == 0)
1624 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1625 if (buf[8 + 6] & 0x08)
1626 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1627 if (buf[8 + 3] & 0x01)
1628 cdi->mask &= ~CDC_CD_R;
1629 if (buf[8 + 3] & 0x02)
1630 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1631 if (buf[8 + 2] & 0x38)
1632 cdi->mask &= ~CDC_DVD;
1633 if (buf[8 + 3] & 0x20)
1634 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1635 if (buf[8 + 3] & 0x10)
1636 cdi->mask &= ~CDC_DVD_R;
1637 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1638 cdi->mask &= ~CDC_PLAY_AUDIO;
1640 mechtype = buf[8 + 6] >> 5;
1641 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1642 cdi->mask |= CDC_CLOSE_TRAY;
1644 if (cdi->sanyo_slot > 0) {
1645 cdi->mask &= ~CDC_SELECT_DISC;
1647 } else if (mechtype == mechtype_individual_changer ||
1648 mechtype == mechtype_cartridge_changer) {
1649 nslots = cdrom_number_of_slots(cdi);
1651 cdi->mask &= ~CDC_SELECT_DISC;
1654 ide_cdrom_update_speed(drive, buf);
1656 printk(KERN_INFO "%s: ATAPI", drive->name);
1658 /* don't print speed if the drive reported 0 */
1660 printk(KERN_CONT " %dX", cd->max_speed);
1662 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1664 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1665 printk(KERN_CONT " DVD%s%s",
1666 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1667 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1669 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1670 printk(KERN_CONT " CD%s%s",
1671 (cdi->mask & CDC_CD_R) ? "" : "-R",
1672 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1674 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1675 printk(KERN_CONT " changer w/%d slots", nslots);
1677 printk(KERN_CONT " drive");
1679 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1684 /* standard prep_rq_fn that builds 10 byte cmds */
1685 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1687 int hard_sect = queue_hardsect_size(q);
1688 long block = (long)rq->hard_sector / (hard_sect >> 9);
1689 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1691 memset(rq->cmd, 0, sizeof(rq->cmd));
1693 if (rq_data_dir(rq) == READ)
1694 rq->cmd[0] = GPCMD_READ_10;
1696 rq->cmd[0] = GPCMD_WRITE_10;
1701 rq->cmd[2] = (block >> 24) & 0xff;
1702 rq->cmd[3] = (block >> 16) & 0xff;
1703 rq->cmd[4] = (block >> 8) & 0xff;
1704 rq->cmd[5] = block & 0xff;
1707 * and transfer length
1709 rq->cmd[7] = (blocks >> 8) & 0xff;
1710 rq->cmd[8] = blocks & 0xff;
1716 * Most of the SCSI commands are supported directly by ATAPI devices.
1717 * This transform handles the few exceptions.
1719 static int ide_cdrom_prep_pc(struct request *rq)
1723 /* transform 6-byte read/write commands to the 10-byte version */
1724 if (c[0] == READ_6 || c[0] == WRITE_6) {
1731 c[0] += (READ_10 - READ_6);
1737 * it's silly to pretend we understand 6-byte sense commands, just
1738 * reject with ILLEGAL_REQUEST and the caller should take the
1739 * appropriate action
1741 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1742 rq->errors = ILLEGAL_REQUEST;
1743 return BLKPREP_KILL;
1749 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1751 if (blk_fs_request(rq))
1752 return ide_cdrom_prep_fs(q, rq);
1753 else if (blk_pc_request(rq))
1754 return ide_cdrom_prep_pc(rq);
1759 struct cd_list_entry {
1760 const char *id_model;
1761 const char *id_firmware;
1762 unsigned int cd_flags;
1765 #ifdef CONFIG_IDE_PROC_FS
1766 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1768 unsigned long capacity, sectors_per_frame;
1770 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
1773 return capacity * sectors_per_frame;
1776 static int proc_idecd_read_capacity
1777 (char *page, char **start, off_t off, int count, int *eof, void *data)
1779 ide_drive_t *drive = data;
1782 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1783 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1786 static ide_proc_entry_t idecd_proc[] = {
1787 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1788 { NULL, 0, NULL, NULL }
1791 static void ide_cdrom_add_settings(ide_drive_t *drive)
1793 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1794 &drive->dsc_overlap, NULL);
1797 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1800 static const struct cd_list_entry ide_cd_quirks_list[] = {
1801 /* Limit transfer size per interrupt. */
1802 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1803 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1804 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1805 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
1806 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1807 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1808 IDE_CD_FLAG_PRE_ATAPI12, },
1809 /* Vertos 300, some versions of this drive like to talk BCD. */
1810 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
1811 /* Vertos 600 ESD. */
1812 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
1814 * Sanyo 3 CD changer uses a non-standard command for CD changing
1815 * (by default standard ATAPI support for CD changers is used).
1817 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
1818 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
1819 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
1820 /* Stingray 8X CD-ROM. */
1821 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1823 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1824 * mode sense page capabilities size, but older drives break.
1826 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1827 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1828 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1829 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
1831 * Some drives used by Apple don't advertise audio play
1832 * but they do support reading TOC & audio datas.
1834 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1835 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1836 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1837 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1838 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1842 static unsigned int ide_cd_flags(struct hd_driveid *id)
1844 const struct cd_list_entry *cle = ide_cd_quirks_list;
1846 while (cle->id_model) {
1847 if (strcmp(cle->id_model, id->model) == 0 &&
1848 (cle->id_firmware == NULL ||
1849 strstr(id->fw_rev, cle->id_firmware)))
1850 return cle->cd_flags;
1858 int ide_cdrom_setup(ide_drive_t *drive)
1860 struct cdrom_info *cd = drive->driver_data;
1861 struct cdrom_device_info *cdi = &cd->devinfo;
1862 struct hd_driveid *id = drive->id;
1865 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1866 blk_queue_dma_alignment(drive->queue, 31);
1867 drive->queue->unplug_delay = (1 * HZ) / 1000;
1868 if (!drive->queue->unplug_delay)
1869 drive->queue->unplug_delay = 1;
1871 drive->special.all = 0;
1873 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1876 if ((id->config & 0x0060) == 0x20)
1877 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1879 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1880 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1881 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1882 IDE_CD_FLAG_TOCADDR_AS_BCD);
1883 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1884 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1885 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1886 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1887 /* 3 => use CD in slot 0 */
1888 cdi->sanyo_slot = 3;
1890 nslots = ide_cdrom_probe_capabilities(drive);
1892 /* set correct block size */
1893 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1895 if (drive->autotune == IDE_TUNE_DEFAULT ||
1896 drive->autotune == IDE_TUNE_AUTO)
1897 drive->dsc_overlap = (drive->next != drive);
1899 if (ide_cdrom_register(drive, nslots)) {
1900 printk(KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
1901 cd->devinfo.handle = NULL;
1904 ide_cdrom_add_settings(drive);
1908 static void ide_cd_remove(ide_drive_t *drive)
1910 struct cdrom_info *info = drive->driver_data;
1912 ide_proc_unregister_driver(drive, info->driver);
1914 del_gendisk(info->disk);
1919 static void ide_cd_release(struct kref *kref)
1921 struct cdrom_info *info = to_ide_cd(kref);
1922 struct cdrom_device_info *devinfo = &info->devinfo;
1923 ide_drive_t *drive = info->drive;
1924 struct gendisk *g = info->disk;
1927 if (devinfo->handle == drive)
1928 unregister_cdrom(devinfo);
1929 drive->dsc_overlap = 0;
1930 drive->driver_data = NULL;
1931 blk_queue_prep_rq(drive->queue, NULL);
1932 g->private_data = NULL;
1937 static int ide_cd_probe(ide_drive_t *);
1939 static ide_driver_t ide_cdrom_driver = {
1941 .owner = THIS_MODULE,
1942 .name = "ide-cdrom",
1943 .bus = &ide_bus_type,
1945 .probe = ide_cd_probe,
1946 .remove = ide_cd_remove,
1947 .version = IDECD_VERSION,
1949 .supports_dsc_overlap = 1,
1950 .do_request = ide_do_rw_cdrom,
1951 .end_request = ide_end_request,
1952 .error = __ide_error,
1953 .abort = __ide_abort,
1954 #ifdef CONFIG_IDE_PROC_FS
1959 static int idecd_open(struct inode *inode, struct file *file)
1961 struct gendisk *disk = inode->i_bdev->bd_disk;
1962 struct cdrom_info *info;
1965 info = ide_cd_get(disk);
1969 rc = cdrom_open(&info->devinfo, inode, file);
1977 static int idecd_release(struct inode *inode, struct file *file)
1979 struct gendisk *disk = inode->i_bdev->bd_disk;
1980 struct cdrom_info *info = ide_cd_g(disk);
1982 cdrom_release(&info->devinfo, file);
1989 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1991 struct packet_command cgc;
1996 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1999 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2001 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2005 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2006 return cdrom_mode_select(cdi, &cgc);
2009 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2011 struct packet_command cgc;
2016 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2018 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2022 spindown = buffer[11] & 0x0f;
2023 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2028 static int idecd_ioctl(struct inode *inode, struct file *file,
2029 unsigned int cmd, unsigned long arg)
2031 struct block_device *bdev = inode->i_bdev;
2032 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2036 case CDROMSETSPINDOWN:
2037 return idecd_set_spindown(&info->devinfo, arg);
2038 case CDROMGETSPINDOWN:
2039 return idecd_get_spindown(&info->devinfo, arg);
2044 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2046 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2051 static int idecd_media_changed(struct gendisk *disk)
2053 struct cdrom_info *info = ide_cd_g(disk);
2054 return cdrom_media_changed(&info->devinfo);
2057 static int idecd_revalidate_disk(struct gendisk *disk)
2059 struct cdrom_info *info = ide_cd_g(disk);
2060 struct request_sense sense;
2062 ide_cd_read_toc(info->drive, &sense);
2067 static struct block_device_operations idecd_ops = {
2068 .owner = THIS_MODULE,
2070 .release = idecd_release,
2071 .ioctl = idecd_ioctl,
2072 .media_changed = idecd_media_changed,
2073 .revalidate_disk = idecd_revalidate_disk
2076 /* module options */
2077 static char *ignore;
2079 module_param(ignore, charp, 0400);
2080 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2082 static int ide_cd_probe(ide_drive_t *drive)
2084 struct cdrom_info *info;
2086 struct request_sense sense;
2088 if (!strstr("ide-cdrom", drive->driver_req))
2090 if (!drive->present)
2092 if (drive->media != ide_cdrom && drive->media != ide_optical)
2094 /* skip drives that we were told to ignore */
2095 if (ignore != NULL) {
2096 if (strstr(ignore, drive->name)) {
2097 printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
2102 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
2105 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2107 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
2111 g = alloc_disk(1 << PARTN_BITS);
2115 ide_init_disk(g, drive);
2117 ide_proc_register_driver(drive, &ide_cdrom_driver);
2119 kref_init(&info->kref);
2121 info->drive = drive;
2122 info->driver = &ide_cdrom_driver;
2125 g->private_data = &info->driver;
2127 drive->driver_data = info;
2130 g->driverfs_dev = &drive->gendev;
2131 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2132 if (ide_cdrom_setup(drive)) {
2133 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2134 ide_cd_release(&info->kref);
2138 ide_cd_read_toc(drive, &sense);
2139 g->fops = &idecd_ops;
2140 g->flags |= GENHD_FL_REMOVABLE;
2150 static void __exit ide_cdrom_exit(void)
2152 driver_unregister(&ide_cdrom_driver.gen_driver);
2155 static int __init ide_cdrom_init(void)
2157 return driver_register(&ide_cdrom_driver.gen_driver);
2160 MODULE_ALIAS("ide:*m-cdrom*");
2161 MODULE_ALIAS("ide-cd");
2162 module_init(ide_cdrom_init);
2163 module_exit(ide_cdrom_exit);
2164 MODULE_LICENSE("GPL");