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);
139 static void cdrom_analyze_sense_data(ide_drive_t *drive,
140 struct request *failed_command,
141 struct request_sense *sense)
143 unsigned long sector;
144 unsigned long bio_sectors;
145 struct cdrom_info *info = drive->driver_data;
147 if (!cdrom_log_sense(drive, failed_command, sense))
151 * If a read toc is executed for a CD-R or CD-RW medium where the first
152 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
155 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
156 if (sense->sense_key == 0x05 && sense->asc == 0x24)
160 if (sense->error_code == 0x70) {
161 switch (sense->sense_key) {
163 case VOLUME_OVERFLOW:
164 case ILLEGAL_REQUEST:
167 if (failed_command == NULL ||
168 !blk_fs_request(failed_command))
170 sector = (sense->information[0] << 24) |
171 (sense->information[1] << 16) |
172 (sense->information[2] << 8) |
173 (sense->information[3]);
175 if (drive->queue->hardsect_size == 2048)
176 /* device sector size is 2K */
179 bio_sectors = max(bio_sectors(failed_command->bio), 4U);
180 sector &= ~(bio_sectors - 1);
182 if (sector < get_capacity(info->disk) &&
183 drive->probed_capacity - sector < 4 * 75)
184 set_capacity(info->disk, sector);
188 ide_cd_log_error(drive->name, failed_command, sense);
191 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
192 struct request *failed_command)
194 struct cdrom_info *info = drive->driver_data;
195 struct request *rq = &info->request_sense_request;
198 sense = &info->sense_data;
200 /* stuff the sense request in front of our current request */
201 blk_rq_init(NULL, rq);
202 rq->cmd_type = REQ_TYPE_ATA_PC;
203 rq->rq_disk = info->disk;
206 rq->cmd[0] = GPCMD_REQUEST_SENSE;
210 rq->cmd_type = REQ_TYPE_SENSE;
211 rq->cmd_flags |= REQ_PREEMPT;
213 /* NOTE! Save the failed command in "rq->buffer" */
214 rq->buffer = (void *) failed_command;
216 ide_do_drive_cmd(drive, rq);
219 static void cdrom_end_request(ide_drive_t *drive, int uptodate)
221 struct request *rq = HWGROUP(drive)->rq;
222 int nsectors = rq->hard_cur_sectors;
224 if (blk_sense_request(rq) && uptodate) {
226 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
229 struct request *failed = (struct request *) rq->buffer;
230 struct cdrom_info *info = drive->driver_data;
231 void *sense = &info->sense_data;
236 sense = failed->sense;
237 failed->sense_len = rq->sense_len;
239 cdrom_analyze_sense_data(drive, failed, sense);
241 * now end the failed request
243 if (blk_fs_request(failed)) {
244 if (ide_end_dequeued_request(drive, failed, 0,
245 failed->hard_nr_sectors))
248 spin_lock_irqsave(&ide_lock, flags);
249 if (__blk_end_request(failed, -EIO,
252 spin_unlock_irqrestore(&ide_lock, flags);
255 cdrom_analyze_sense_data(drive, NULL, sense);
258 if (!rq->current_nr_sectors && blk_fs_request(rq))
260 /* make sure it's fully ended */
261 if (blk_pc_request(rq))
262 nsectors = (rq->data_len + 511) >> 9;
266 ide_end_request(drive, uptodate, nsectors);
269 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
273 ide_dump_status(drive, msg, st);
278 * 0: if the request should be continued.
279 * 1: if the request was ended.
281 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
283 struct request *rq = HWGROUP(drive)->rq;
284 int stat, err, sense_key;
286 /* check for errors */
287 stat = ide_read_status(drive);
292 if (OK_STAT(stat, good_stat, BAD_R_STAT))
295 /* get the IDE error register */
296 err = ide_read_error(drive);
297 sense_key = err >> 4;
300 printk(KERN_ERR "%s: missing rq in %s\n",
301 drive->name, __func__);
305 if (blk_sense_request(rq)) {
307 * We got an error trying to get sense info from the drive
308 * (probably while trying to recover from a former error).
311 rq->cmd_flags |= REQ_FAILED;
312 cdrom_end_request(drive, 0);
313 ide_error(drive, "request sense failure", stat);
316 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
317 /* All other functions, except for READ. */
320 * if we have an error, pass back CHECK_CONDITION as the
323 if (blk_pc_request(rq) && !rq->errors)
324 rq->errors = SAM_STAT_CHECK_CONDITION;
326 /* check for tray open */
327 if (sense_key == NOT_READY) {
328 cdrom_saw_media_change(drive);
329 } else if (sense_key == UNIT_ATTENTION) {
330 /* check for media change */
331 cdrom_saw_media_change(drive);
333 } else if (sense_key == ILLEGAL_REQUEST &&
334 rq->cmd[0] == GPCMD_START_STOP_UNIT) {
336 * Don't print error message for this condition--
337 * SFF8090i indicates that 5/24/00 is the correct
338 * response to a request to close the tray if the
339 * drive doesn't have that capability.
340 * cdrom_log_sense() knows this!
342 } else if (!(rq->cmd_flags & REQ_QUIET)) {
343 /* otherwise, print an error */
344 ide_dump_status(drive, "packet command error", stat);
347 rq->cmd_flags |= REQ_FAILED;
350 * instead of playing games with moving completions around,
351 * remove failed request completely and end it when the
352 * request sense has completed
356 } else if (blk_fs_request(rq)) {
357 int do_end_request = 0;
359 /* handle errors from READ and WRITE requests */
361 if (blk_noretry_request(rq))
364 if (sense_key == NOT_READY) {
366 if (rq_data_dir(rq) == READ) {
367 cdrom_saw_media_change(drive);
369 /* fail the request */
370 printk(KERN_ERR "%s: tray open\n", drive->name);
373 struct cdrom_info *info = drive->driver_data;
376 * Allow the drive 5 seconds to recover, some
377 * devices will return this error while flushing
381 info->write_timeout = jiffies +
382 ATAPI_WAIT_WRITE_BUSY;
384 if (time_after(jiffies, info->write_timeout))
390 * take a breather relying on the unplug
391 * timer to kick us again
393 spin_lock_irqsave(&ide_lock, flags);
394 blk_plug_device(drive->queue);
395 spin_unlock_irqrestore(&ide_lock,
400 } else if (sense_key == UNIT_ATTENTION) {
402 cdrom_saw_media_change(drive);
405 * Arrange to retry the request but be sure to give up
406 * if we've retried too many times.
408 if (++rq->errors > ERROR_MAX)
410 } else if (sense_key == ILLEGAL_REQUEST ||
411 sense_key == DATA_PROTECT) {
413 * No point in retrying after an illegal request or data
416 ide_dump_status_no_sense(drive, "command error", stat);
418 } else if (sense_key == MEDIUM_ERROR) {
420 * No point in re-trying a zillion times on a bad
421 * sector. If we got here the error is not correctable.
423 ide_dump_status_no_sense(drive,
424 "media error (bad sector)",
427 } else if (sense_key == BLANK_CHECK) {
428 /* disk appears blank ?? */
429 ide_dump_status_no_sense(drive, "media error (blank)",
432 } else if ((err & ~ABRT_ERR) != 0) {
433 /* go to the default handler for other errors */
434 ide_error(drive, "cdrom_decode_status", stat);
436 } else if ((++rq->errors > ERROR_MAX)) {
437 /* we've racked up too many retries, abort */
442 * End a request through request sense analysis when we have
443 * sense data. We need this in order to perform end of media
450 * If we got a CHECK_CONDITION status, queue
451 * a request sense command.
454 cdrom_queue_request_sense(drive, NULL, NULL);
456 blk_dump_rq_flags(rq, "ide-cd: bad rq");
457 cdrom_end_request(drive, 0);
460 /* retry, or handle the next request */
464 if (stat & ERR_STAT) {
467 spin_lock_irqsave(&ide_lock, flags);
468 blkdev_dequeue_request(rq);
469 HWGROUP(drive)->rq = NULL;
470 spin_unlock_irqrestore(&ide_lock, flags);
472 cdrom_queue_request_sense(drive, rq->sense, rq);
474 cdrom_end_request(drive, 0);
479 static int cdrom_timer_expiry(ide_drive_t *drive)
481 struct request *rq = HWGROUP(drive)->rq;
482 unsigned long wait = 0;
485 * Some commands are *slow* and normally take a long time to complete.
486 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
487 * commands/drives support that. Let ide_timer_expiry keep polling us
490 switch (rq->cmd[0]) {
492 case GPCMD_FORMAT_UNIT:
493 case GPCMD_RESERVE_RZONE_TRACK:
494 case GPCMD_CLOSE_TRACK:
495 case GPCMD_FLUSH_CACHE:
496 wait = ATAPI_WAIT_PC;
499 if (!(rq->cmd_flags & REQ_QUIET))
500 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n",
509 * Set up the device registers for transferring a packet command on DEV,
510 * expecting to later transfer XFERLEN bytes. HANDLER is the routine
511 * which actually transfers the command to the drive. If this is a
512 * drq_interrupt device, this routine will arrange for HANDLER to be
513 * called when the interrupt from the drive arrives. Otherwise, HANDLER
514 * will be called immediately after the drive is prepared for the transfer.
516 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
518 ide_handler_t *handler)
520 ide_startstop_t startstop;
521 struct cdrom_info *info = drive->driver_data;
522 ide_hwif_t *hwif = drive->hwif;
524 /* wait for the controller to be idle */
525 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
528 /* FIXME: for Virtual DMA we must check harder */
530 info->dma = !hwif->dma_ops->dma_setup(drive);
532 /* set up the controller registers */
533 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
536 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
537 /* waiting for CDB interrupt, not DMA yet. */
539 drive->waiting_for_dma = 0;
542 ide_execute_command(drive, WIN_PACKETCMD, handler,
543 ATAPI_WAIT_PC, cdrom_timer_expiry);
546 ide_execute_pkt_cmd(drive);
548 return (*handler) (drive);
553 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
554 * registers must have already been prepared by cdrom_start_packet_command.
555 * HANDLER is the interrupt handler to call when the command completes or
556 * there's data ready.
558 #define ATAPI_MIN_CDB_BYTES 12
559 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
561 ide_handler_t *handler)
563 ide_hwif_t *hwif = drive->hwif;
565 struct cdrom_info *info = drive->driver_data;
566 ide_startstop_t startstop;
568 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
570 * Here we should have been called after receiving an interrupt
571 * from the device. DRQ should how be set.
574 /* check for errors */
575 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
578 /* ok, next interrupt will be DMA interrupt */
580 drive->waiting_for_dma = 1;
582 /* otherwise, we must wait for DRQ to get set */
583 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
584 BUSY_STAT, WAIT_READY))
588 /* arm the interrupt handler */
589 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
591 /* ATAPI commands get padded out to 12 bytes minimum */
592 cmd_len = COMMAND_SIZE(rq->cmd[0]);
593 if (cmd_len < ATAPI_MIN_CDB_BYTES)
594 cmd_len = ATAPI_MIN_CDB_BYTES;
596 /* send the command to the device */
597 hwif->output_data(drive, NULL, rq->cmd, cmd_len);
599 /* start the DMA if need be */
601 hwif->dma_ops->dma_start(drive);
607 * Block read functions.
609 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
613 xf(drive, NULL, &dum, sizeof(dum));
618 static void ide_cd_drain_data(ide_drive_t *drive, int nsects)
621 static char dum[SECTOR_SIZE];
623 drive->hwif->input_data(drive, NULL, dum, sizeof(dum));
629 * Check the contents of the interrupt reason register from the cdrom
630 * and attempt to recover if there are problems. Returns 0 if everything's
631 * ok; nonzero if the request has been terminated.
633 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
634 int len, int ireason, int rw)
637 * ireason == 0: the drive wants to receive data from us
638 * ireason == 2: the drive is expecting to transfer data to us
640 if (ireason == (!rw << 1))
642 else if (ireason == (rw << 1)) {
643 ide_hwif_t *hwif = drive->hwif;
647 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
648 drive->name, __func__);
650 xf = rw ? hwif->output_data : hwif->input_data;
651 ide_cd_pad_transfer(drive, xf, len);
652 } else if (rw == 0 && ireason == 1) {
654 * Some drives (ASUS) seem to tell us that status info is
655 * available. Just get it and ignore.
657 (void)ide_read_status(drive);
660 /* drive wants a command packet, or invalid ireason... */
661 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
662 drive->name, __func__, ireason);
665 if (rq->cmd_type == REQ_TYPE_ATA_PC)
666 rq->cmd_flags |= REQ_FAILED;
668 cdrom_end_request(drive, 0);
673 * Assume that the drive will always provide data in multiples of at least
674 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
676 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
678 struct cdrom_info *cd = drive->driver_data;
680 if ((len % SECTOR_SIZE) == 0)
683 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
684 drive->name, __func__, len);
686 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
687 printk(KERN_ERR " This drive is not supported by "
688 "this version of the driver\n");
690 printk(KERN_ERR " Trying to limit transfer sizes\n");
691 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
697 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
700 * Routine to send a read/write packet command to the drive. This is usually
701 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
702 * devices, it is called from an interrupt when the drive is ready to accept
705 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
707 struct request *rq = HWGROUP(drive)->rq;
709 if (rq_data_dir(rq) == READ) {
710 unsigned short sectors_per_frame =
711 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
712 int nskip = rq->sector & (sectors_per_frame - 1);
715 * If the requested sector doesn't start on a frame boundary,
716 * we must adjust the start of the transfer so that it does,
717 * and remember to skip the first few sectors.
719 * If the rq->current_nr_sectors field is larger than the size
720 * of the buffer, it will mean that we're to skip a number of
721 * sectors equal to the amount by which rq->current_nr_sectors
722 * is larger than the buffer size.
725 /* sanity check... */
726 if (rq->current_nr_sectors !=
727 bio_cur_sectors(rq->bio)) {
728 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
729 drive->name, __func__,
730 rq->current_nr_sectors);
731 cdrom_end_request(drive, 0);
734 rq->current_nr_sectors += nskip;
739 /* the immediate bit */
742 /* set up the command */
743 rq->timeout = ATAPI_WAIT_PC;
745 /* send the command to the drive and return */
746 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
749 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
750 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
751 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
753 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
755 struct cdrom_info *info = drive->driver_data;
757 static int retry = 10;
759 if (cdrom_decode_status(drive, 0, &stat))
762 info->cd_flags |= IDE_CD_FLAG_SEEKING;
764 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
766 drive->dsc_overlap = 0;
771 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
773 struct request *rq = HWGROUP(drive)->rq;
774 sector_t frame = rq->sector;
776 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
778 memset(rq->cmd, 0, BLK_MAX_CDB);
779 rq->cmd[0] = GPCMD_SEEK;
780 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
782 rq->timeout = ATAPI_WAIT_PC;
783 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
786 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
788 struct cdrom_info *info = drive->driver_data;
791 info->start_seek = jiffies;
792 return cdrom_start_packet_command(drive, 0,
793 cdrom_start_seek_continuation);
797 * Fix up a possibly partially-processed request so that we can start it over
798 * entirely, or even put it back on the request queue.
800 static void restore_request(struct request *rq)
802 if (rq->buffer != bio_data(rq->bio)) {
804 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
806 rq->buffer = bio_data(rq->bio);
810 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
811 rq->hard_cur_sectors = rq->current_nr_sectors;
812 rq->hard_nr_sectors = rq->nr_sectors;
813 rq->hard_sector = rq->sector;
814 rq->q->prep_rq_fn(rq->q, rq);
818 * All other packet commands.
820 static void ide_cd_request_sense_fixup(struct request *rq)
823 * Some of the trailing request sense fields are optional,
824 * and some drives don't send them. Sigh.
826 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
827 rq->data_len > 0 && rq->data_len <= 5)
828 while (rq->data_len > 0) {
829 *(u8 *)rq->data++ = 0;
834 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
835 int write, void *buffer, unsigned *bufflen,
836 struct request_sense *sense, int timeout,
837 unsigned int cmd_flags)
839 struct cdrom_info *info = drive->driver_data;
840 struct request_sense local_sense;
842 unsigned int flags = 0;
845 sense = &local_sense;
847 /* start of retry loop */
852 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
854 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
855 rq->cmd_type = REQ_TYPE_ATA_PC;
857 rq->cmd_flags |= cmd_flags;
858 rq->timeout = timeout;
861 rq->data_len = *bufflen;
864 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
867 *bufflen = rq->data_len;
869 flags = rq->cmd_flags;
873 * FIXME: we should probably abort/retry or something in case of
876 if (flags & REQ_FAILED) {
878 * The request failed. Retry if it was due to a unit
879 * attention status (usually means media was changed).
881 struct request_sense *reqbuf = sense;
883 if (reqbuf->sense_key == UNIT_ATTENTION)
884 cdrom_saw_media_change(drive);
885 else if (reqbuf->sense_key == NOT_READY &&
886 reqbuf->asc == 4 && reqbuf->ascq != 4) {
888 * The drive is in the process of loading
889 * a disk. Retry, but wait a little to give
890 * the drive time to complete the load.
894 /* otherwise, don't retry */
900 /* end of retry loop */
901 } while ((flags & REQ_FAILED) && retries >= 0);
903 /* return an error if the command failed */
904 return (flags & REQ_FAILED) ? -EIO : 0;
908 * Called from blk_end_request_callback() after the data of the request is
909 * completed and before the request itself is completed. By returning value '1',
910 * blk_end_request_callback() returns immediately without completing it.
912 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
917 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
919 ide_hwif_t *hwif = drive->hwif;
920 struct cdrom_info *info = drive->driver_data;
921 struct request *rq = HWGROUP(drive)->rq;
922 xfer_func_t *xferfunc;
923 ide_expiry_t *expiry = NULL;
924 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
925 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
926 unsigned int timeout;
929 /* check for errors */
933 dma_error = hwif->dma_ops->dma_end(drive);
935 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
936 write ? "write" : "read");
941 if (cdrom_decode_status(drive, 0, &stat))
944 /* using dma, transfer is complete now */
947 return ide_error(drive, "dma error", stat);
948 if (blk_fs_request(rq)) {
949 ide_end_request(drive, 1, rq->nr_sectors);
955 /* ok we fall to pio :/ */
956 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
957 lowcyl = hwif->INB(hwif->io_ports.lbam_addr);
958 highcyl = hwif->INB(hwif->io_ports.lbah_addr);
960 len = lowcyl + (256 * highcyl);
962 thislen = blk_fs_request(rq) ? len : rq->data_len;
966 /* If DRQ is clear, the command has completed. */
967 if ((stat & DRQ_STAT) == 0) {
968 if (blk_fs_request(rq)) {
970 * If we're not done reading/writing, complain.
971 * Otherwise, complete the command normally.
974 if (rq->current_nr_sectors > 0) {
975 printk(KERN_ERR "%s: %s: data underrun "
977 drive->name, __func__,
978 rq->current_nr_sectors);
980 rq->cmd_flags |= REQ_FAILED;
983 cdrom_end_request(drive, uptodate);
985 } else if (!blk_pc_request(rq)) {
986 ide_cd_request_sense_fixup(rq);
987 /* complain if we still have data left to transfer */
988 uptodate = rq->data_len ? 0 : 1;
993 /* check which way to transfer data */
994 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
997 if (blk_fs_request(rq)) {
1001 if (ide_cd_check_transfer_size(drive, len)) {
1002 cdrom_end_request(drive, 0);
1007 * First, figure out if we need to bit-bucket
1008 * any of the leading sectors.
1010 nskip = min_t(int, rq->current_nr_sectors
1011 - bio_cur_sectors(rq->bio),
1014 ide_cd_drain_data(drive, nskip);
1015 rq->current_nr_sectors -= nskip;
1016 thislen -= (nskip << 9);
1023 xferfunc = hwif->output_data;
1026 xferfunc = hwif->input_data;
1030 while (thislen > 0) {
1031 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1032 int blen = rq->data_len;
1036 if (blk_fs_request(rq)) {
1038 blen = rq->current_nr_sectors << 9;
1040 ptr = bio_data(rq->bio);
1041 blen = bio_iovec(rq->bio)->bv_len;
1046 if (blk_fs_request(rq) && !write)
1048 * If the buffers are full, pipe the rest into
1051 ide_cd_drain_data(drive, thislen >> 9);
1053 printk(KERN_ERR "%s: confused, missing data\n",
1055 blk_dump_rq_flags(rq, rq_data_dir(rq)
1056 ? "cdrom_newpc_intr, write"
1057 : "cdrom_newpc_intr, read");
1065 xferfunc(drive, NULL, ptr, blen);
1070 if (blk_fs_request(rq)) {
1072 rq->nr_sectors -= (blen >> 9);
1073 rq->current_nr_sectors -= (blen >> 9);
1074 rq->sector += (blen >> 9);
1076 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1077 cdrom_end_request(drive, 1);
1079 rq->data_len -= blen;
1082 * The request can't be completed until DRQ is cleared.
1083 * So complete the data, but don't complete the request
1084 * using the dummy function for the callback feature
1085 * of blk_end_request_callback().
1088 blk_end_request_callback(rq, 0, blen,
1089 cdrom_newpc_intr_dummy_cb);
1093 if (!write && blk_sense_request(rq))
1094 rq->sense_len += blen;
1097 /* pad, if necessary */
1098 if (!blk_fs_request(rq) && len > 0)
1099 ide_cd_pad_transfer(drive, xferfunc, len);
1101 if (blk_pc_request(rq)) {
1102 timeout = rq->timeout;
1104 timeout = ATAPI_WAIT_PC;
1105 if (!blk_fs_request(rq))
1106 expiry = cdrom_timer_expiry;
1109 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1113 if (blk_pc_request(rq)) {
1114 unsigned long flags;
1115 unsigned int dlen = rq->data_len;
1120 spin_lock_irqsave(&ide_lock, flags);
1121 if (__blk_end_request(rq, 0, dlen))
1123 HWGROUP(drive)->rq = NULL;
1124 spin_unlock_irqrestore(&ide_lock, flags);
1127 rq->cmd_flags |= REQ_FAILED;
1128 cdrom_end_request(drive, uptodate);
1133 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1135 struct cdrom_info *cd = drive->driver_data;
1136 int write = rq_data_dir(rq) == WRITE;
1137 unsigned short sectors_per_frame =
1138 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1141 /* disk has become write protected */
1142 if (cd->disk->policy) {
1143 cdrom_end_request(drive, 0);
1148 * We may be retrying this request after an error. Fix up any
1149 * weirdness which might be present in the request packet.
1151 restore_request(rq);
1154 /* use DMA, if possible / writes *must* be hardware frame aligned */
1155 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1156 (rq->sector & (sectors_per_frame - 1))) {
1158 cdrom_end_request(drive, 0);
1163 cd->dma = drive->using_dma;
1166 cd->devinfo.media_written = 1;
1168 /* start sending the read/write request to the drive */
1169 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1172 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1174 struct request *rq = HWGROUP(drive)->rq;
1177 rq->timeout = ATAPI_WAIT_PC;
1179 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1182 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1184 struct cdrom_info *info = drive->driver_data;
1186 if (blk_pc_request(rq))
1187 rq->cmd_flags |= REQ_QUIET;
1189 rq->cmd_flags &= ~REQ_FAILED;
1195 int mask = drive->queue->dma_alignment;
1196 unsigned long addr =
1197 (unsigned long)page_address(bio_page(rq->bio));
1198 unsigned long stack_mask = ~(THREAD_SIZE - 1);
1200 info->dma = drive->using_dma;
1203 * check if dma is safe
1205 * NOTE! The "len" and "addr" checks should possibly have
1208 if ((rq->data_len & 15) || (addr & mask))
1211 if (!((addr & stack_mask) ^
1212 ((unsigned long)current->stack & stack_mask)))
1216 /* start sending the command to the drive */
1217 return cdrom_start_packet_command(drive, rq->data_len,
1218 cdrom_do_newpc_cont);
1222 * cdrom driver request routine.
1224 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1227 ide_startstop_t action;
1228 struct cdrom_info *info = drive->driver_data;
1230 if (blk_fs_request(rq)) {
1231 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1232 unsigned long elapsed = jiffies - info->start_seek;
1233 int stat = ide_read_status(drive);
1235 if ((stat & SEEK_STAT) != SEEK_STAT) {
1236 if (elapsed < IDECD_SEEK_TIMEOUT) {
1237 ide_stall_queue(drive,
1241 printk(KERN_ERR "%s: DSC timeout\n",
1244 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1246 if (rq_data_dir(rq) == READ &&
1247 IDE_LARGE_SEEK(info->last_block, block,
1248 IDECD_SEEK_THRESHOLD) &&
1250 action = cdrom_start_seek(drive, block);
1252 action = cdrom_start_rw(drive, rq);
1253 info->last_block = block;
1255 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1256 rq->cmd_type == REQ_TYPE_ATA_PC) {
1257 return cdrom_do_block_pc(drive, rq);
1258 } else if (blk_special_request(rq)) {
1259 /* right now this can only be a reset... */
1260 cdrom_end_request(drive, 1);
1264 blk_dump_rq_flags(rq, "ide-cd bad flags");
1265 cdrom_end_request(drive, 0);
1274 * Routines which queue packet commands take as a final argument a pointer to a
1275 * request_sense struct. If execution of the command results in an error with a
1276 * CHECK CONDITION status, this structure will be filled with the results of the
1277 * subsequent request sense command. The pointer can also be NULL, in which case
1278 * no sense information is returned.
1280 static void msf_from_bcd(struct atapi_msf *msf)
1282 msf->minute = BCD2BIN(msf->minute);
1283 msf->second = BCD2BIN(msf->second);
1284 msf->frame = BCD2BIN(msf->frame);
1287 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1289 struct cdrom_info *info = drive->driver_data;
1290 struct cdrom_device_info *cdi = &info->devinfo;
1291 unsigned char cmd[BLK_MAX_CDB];
1293 memset(cmd, 0, BLK_MAX_CDB);
1294 cmd[0] = GPCMD_TEST_UNIT_READY;
1297 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1298 * instead of supporting the LOAD_UNLOAD opcode.
1300 cmd[7] = cdi->sanyo_slot % 3;
1302 return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, REQ_QUIET);
1305 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1306 unsigned long *sectors_per_frame,
1307 struct request_sense *sense)
1315 unsigned char cmd[BLK_MAX_CDB];
1316 unsigned len = sizeof(capbuf);
1318 memset(cmd, 0, BLK_MAX_CDB);
1319 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1321 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1324 *capacity = 1 + be32_to_cpu(capbuf.lba);
1325 *sectors_per_frame =
1326 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1332 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1333 int format, char *buf, int buflen,
1334 struct request_sense *sense)
1336 unsigned char cmd[BLK_MAX_CDB];
1338 memset(cmd, 0, BLK_MAX_CDB);
1340 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1342 cmd[7] = (buflen >> 8);
1343 cmd[8] = (buflen & 0xff);
1344 cmd[9] = (format << 6);
1349 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1352 /* Try to read the entire TOC for the disk into our internal buffer. */
1353 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1355 int stat, ntracks, i;
1356 struct cdrom_info *info = drive->driver_data;
1357 struct cdrom_device_info *cdi = &info->devinfo;
1358 struct atapi_toc *toc = info->toc;
1360 struct atapi_toc_header hdr;
1361 struct atapi_toc_entry ent;
1364 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1367 /* try to allocate space */
1368 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1370 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1378 * Check to see if the existing data is still valid. If it is,
1381 (void) cdrom_check_status(drive, sense);
1383 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1386 /* try to get the total cdrom capacity and sector size */
1387 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
1390 toc->capacity = 0x1fffff;
1392 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1393 /* save a private copy of the TOC capacity for error handling */
1394 drive->probed_capacity = toc->capacity * sectors_per_frame;
1396 blk_queue_hardsect_size(drive->queue,
1397 sectors_per_frame << SECTOR_BITS);
1399 /* first read just the header, so we know how long the TOC is */
1400 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1401 sizeof(struct atapi_toc_header), sense);
1405 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1406 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1407 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1410 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1413 if (ntracks > MAX_TRACKS)
1414 ntracks = MAX_TRACKS;
1416 /* now read the whole schmeer */
1417 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1419 sizeof(struct atapi_toc_header) +
1421 sizeof(struct atapi_toc_entry), sense);
1423 if (stat && toc->hdr.first_track > 1) {
1425 * Cds with CDI tracks only don't have any TOC entries, despite
1426 * of this the returned values are
1427 * first_track == last_track = number of CDI tracks + 1,
1428 * so that this case is indistinguishable from the same layout
1429 * plus an additional audio track. If we get an error for the
1430 * regular case, we assume a CDI without additional audio
1431 * tracks. In this case the readable TOC is empty (CDI tracks
1432 * are not included) and only holds the Leadout entry.
1437 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1439 sizeof(struct atapi_toc_header) +
1441 sizeof(struct atapi_toc_entry),
1446 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1447 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1448 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1450 toc->hdr.first_track = CDROM_LEADOUT;
1451 toc->hdr.last_track = CDROM_LEADOUT;
1458 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1460 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1461 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1462 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1465 for (i = 0; i <= ntracks; i++) {
1466 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1467 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1468 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1469 msf_from_bcd(&toc->ent[i].addr.msf);
1471 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1472 toc->ent[i].addr.msf.second,
1473 toc->ent[i].addr.msf.frame);
1476 if (toc->hdr.first_track != CDROM_LEADOUT) {
1477 /* read the multisession information */
1478 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1479 sizeof(ms_tmp), sense);
1483 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1485 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1486 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1487 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1490 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1491 /* re-read multisession information using MSF format */
1492 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1493 sizeof(ms_tmp), sense);
1497 msf_from_bcd(&ms_tmp.ent.addr.msf);
1498 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1499 ms_tmp.ent.addr.msf.second,
1500 ms_tmp.ent.addr.msf.frame);
1503 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1505 /* now try to get the total cdrom capacity */
1506 stat = cdrom_get_last_written(cdi, &last_written);
1507 if (!stat && (last_written > toc->capacity)) {
1508 toc->capacity = last_written;
1509 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1510 drive->probed_capacity = toc->capacity * sectors_per_frame;
1513 /* Remember that we've read this stuff. */
1514 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1519 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1521 struct cdrom_info *info = drive->driver_data;
1522 struct cdrom_device_info *cdi = &info->devinfo;
1523 struct packet_command cgc;
1524 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1526 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1527 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1529 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1531 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1532 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1535 } while (--attempts);
1539 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1541 struct cdrom_info *cd = drive->driver_data;
1542 u16 curspeed, maxspeed;
1544 curspeed = *(u16 *)&buf[8 + 14];
1545 maxspeed = *(u16 *)&buf[8 + 8];
1547 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1548 curspeed = le16_to_cpu(curspeed);
1549 maxspeed = le16_to_cpu(maxspeed);
1551 curspeed = be16_to_cpu(curspeed);
1552 maxspeed = be16_to_cpu(maxspeed);
1555 cd->current_speed = (curspeed + (176/2)) / 176;
1556 cd->max_speed = (maxspeed + (176/2)) / 176;
1559 #define IDE_CD_CAPABILITIES \
1560 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1561 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1562 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1563 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1564 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1566 static struct cdrom_device_ops ide_cdrom_dops = {
1567 .open = ide_cdrom_open_real,
1568 .release = ide_cdrom_release_real,
1569 .drive_status = ide_cdrom_drive_status,
1570 .media_changed = ide_cdrom_check_media_change_real,
1571 .tray_move = ide_cdrom_tray_move,
1572 .lock_door = ide_cdrom_lock_door,
1573 .select_speed = ide_cdrom_select_speed,
1574 .get_last_session = ide_cdrom_get_last_session,
1575 .get_mcn = ide_cdrom_get_mcn,
1576 .reset = ide_cdrom_reset,
1577 .audio_ioctl = ide_cdrom_audio_ioctl,
1578 .capability = IDE_CD_CAPABILITIES,
1579 .generic_packet = ide_cdrom_packet,
1582 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1584 struct cdrom_info *info = drive->driver_data;
1585 struct cdrom_device_info *devinfo = &info->devinfo;
1587 devinfo->ops = &ide_cdrom_dops;
1588 devinfo->speed = info->current_speed;
1589 devinfo->capacity = nslots;
1590 devinfo->handle = drive;
1591 strcpy(devinfo->name, drive->name);
1593 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1594 devinfo->mask |= CDC_SELECT_SPEED;
1596 devinfo->disk = info->disk;
1597 return register_cdrom(devinfo);
1600 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1602 struct cdrom_info *cd = drive->driver_data;
1603 struct cdrom_device_info *cdi = &cd->devinfo;
1604 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1605 mechtype_t mechtype;
1608 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1609 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1610 CDC_MO_DRIVE | CDC_RAM);
1612 if (drive->media == ide_optical) {
1613 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1614 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1619 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1620 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1621 cdi->mask &= ~CDC_PLAY_AUDIO;
1626 * We have to cheat a little here. the packet will eventually be queued
1627 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1628 * Since this device hasn't been registered with the Uniform layer yet,
1629 * it can't do this. Same goes for cdi->ops.
1631 cdi->handle = drive;
1632 cdi->ops = &ide_cdrom_dops;
1634 if (ide_cdrom_get_capabilities(drive, buf))
1637 if ((buf[8 + 6] & 0x01) == 0)
1638 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1639 if (buf[8 + 6] & 0x08)
1640 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1641 if (buf[8 + 3] & 0x01)
1642 cdi->mask &= ~CDC_CD_R;
1643 if (buf[8 + 3] & 0x02)
1644 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1645 if (buf[8 + 2] & 0x38)
1646 cdi->mask &= ~CDC_DVD;
1647 if (buf[8 + 3] & 0x20)
1648 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1649 if (buf[8 + 3] & 0x10)
1650 cdi->mask &= ~CDC_DVD_R;
1651 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1652 cdi->mask &= ~CDC_PLAY_AUDIO;
1654 mechtype = buf[8 + 6] >> 5;
1655 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1656 cdi->mask |= CDC_CLOSE_TRAY;
1658 if (cdi->sanyo_slot > 0) {
1659 cdi->mask &= ~CDC_SELECT_DISC;
1661 } else if (mechtype == mechtype_individual_changer ||
1662 mechtype == mechtype_cartridge_changer) {
1663 nslots = cdrom_number_of_slots(cdi);
1665 cdi->mask &= ~CDC_SELECT_DISC;
1668 ide_cdrom_update_speed(drive, buf);
1670 printk(KERN_INFO "%s: ATAPI", drive->name);
1672 /* don't print speed if the drive reported 0 */
1674 printk(KERN_CONT " %dX", cd->max_speed);
1676 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1678 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1679 printk(KERN_CONT " DVD%s%s",
1680 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1681 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1683 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1684 printk(KERN_CONT " CD%s%s",
1685 (cdi->mask & CDC_CD_R) ? "" : "-R",
1686 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1688 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1689 printk(KERN_CONT " changer w/%d slots", nslots);
1691 printk(KERN_CONT " drive");
1693 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1698 /* standard prep_rq_fn that builds 10 byte cmds */
1699 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1701 int hard_sect = queue_hardsect_size(q);
1702 long block = (long)rq->hard_sector / (hard_sect >> 9);
1703 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1705 memset(rq->cmd, 0, BLK_MAX_CDB);
1707 if (rq_data_dir(rq) == READ)
1708 rq->cmd[0] = GPCMD_READ_10;
1710 rq->cmd[0] = GPCMD_WRITE_10;
1715 rq->cmd[2] = (block >> 24) & 0xff;
1716 rq->cmd[3] = (block >> 16) & 0xff;
1717 rq->cmd[4] = (block >> 8) & 0xff;
1718 rq->cmd[5] = block & 0xff;
1721 * and transfer length
1723 rq->cmd[7] = (blocks >> 8) & 0xff;
1724 rq->cmd[8] = blocks & 0xff;
1730 * Most of the SCSI commands are supported directly by ATAPI devices.
1731 * This transform handles the few exceptions.
1733 static int ide_cdrom_prep_pc(struct request *rq)
1737 /* transform 6-byte read/write commands to the 10-byte version */
1738 if (c[0] == READ_6 || c[0] == WRITE_6) {
1745 c[0] += (READ_10 - READ_6);
1751 * it's silly to pretend we understand 6-byte sense commands, just
1752 * reject with ILLEGAL_REQUEST and the caller should take the
1753 * appropriate action
1755 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1756 rq->errors = ILLEGAL_REQUEST;
1757 return BLKPREP_KILL;
1763 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1765 if (blk_fs_request(rq))
1766 return ide_cdrom_prep_fs(q, rq);
1767 else if (blk_pc_request(rq))
1768 return ide_cdrom_prep_pc(rq);
1773 struct cd_list_entry {
1774 const char *id_model;
1775 const char *id_firmware;
1776 unsigned int cd_flags;
1779 #ifdef CONFIG_IDE_PROC_FS
1780 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1782 unsigned long capacity, sectors_per_frame;
1784 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
1787 return capacity * sectors_per_frame;
1790 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1791 int count, int *eof, void *data)
1793 ide_drive_t *drive = data;
1796 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1797 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1800 static ide_proc_entry_t idecd_proc[] = {
1801 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1802 { NULL, 0, NULL, NULL }
1805 static void ide_cdrom_add_settings(ide_drive_t *drive)
1807 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1808 &drive->dsc_overlap, NULL);
1811 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1814 static const struct cd_list_entry ide_cd_quirks_list[] = {
1815 /* Limit transfer size per interrupt. */
1816 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1817 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1818 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1819 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
1820 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1821 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1822 IDE_CD_FLAG_PRE_ATAPI12, },
1823 /* Vertos 300, some versions of this drive like to talk BCD. */
1824 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
1825 /* Vertos 600 ESD. */
1826 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
1828 * Sanyo 3 CD changer uses a non-standard command for CD changing
1829 * (by default standard ATAPI support for CD changers is used).
1831 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
1832 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
1833 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
1834 /* Stingray 8X CD-ROM. */
1835 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1837 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1838 * mode sense page capabilities size, but older drives break.
1840 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1841 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1842 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1843 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
1845 * Some drives used by Apple don't advertise audio play
1846 * but they do support reading TOC & audio datas.
1848 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1849 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1850 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1851 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1852 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1856 static unsigned int ide_cd_flags(struct hd_driveid *id)
1858 const struct cd_list_entry *cle = ide_cd_quirks_list;
1860 while (cle->id_model) {
1861 if (strcmp(cle->id_model, id->model) == 0 &&
1862 (cle->id_firmware == NULL ||
1863 strstr(id->fw_rev, cle->id_firmware)))
1864 return cle->cd_flags;
1871 static int ide_cdrom_setup(ide_drive_t *drive)
1873 struct cdrom_info *cd = drive->driver_data;
1874 struct cdrom_device_info *cdi = &cd->devinfo;
1875 struct hd_driveid *id = drive->id;
1878 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1879 blk_queue_dma_alignment(drive->queue, 31);
1880 drive->queue->unplug_delay = (1 * HZ) / 1000;
1881 if (!drive->queue->unplug_delay)
1882 drive->queue->unplug_delay = 1;
1884 drive->special.all = 0;
1886 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1889 if ((id->config & 0x0060) == 0x20)
1890 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1892 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1893 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1894 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1895 IDE_CD_FLAG_TOCADDR_AS_BCD);
1896 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1897 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1898 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1899 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1900 /* 3 => use CD in slot 0 */
1901 cdi->sanyo_slot = 3;
1903 nslots = ide_cdrom_probe_capabilities(drive);
1905 /* set correct block size */
1906 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1908 drive->dsc_overlap = (drive->next != drive);
1910 if (ide_cdrom_register(drive, nslots)) {
1911 printk(KERN_ERR "%s: %s failed to register device with the"
1912 " cdrom driver.\n", drive->name, __func__);
1913 cd->devinfo.handle = NULL;
1916 ide_cdrom_add_settings(drive);
1920 static void ide_cd_remove(ide_drive_t *drive)
1922 struct cdrom_info *info = drive->driver_data;
1924 ide_proc_unregister_driver(drive, info->driver);
1926 del_gendisk(info->disk);
1931 static void ide_cd_release(struct kref *kref)
1933 struct cdrom_info *info = to_ide_cd(kref);
1934 struct cdrom_device_info *devinfo = &info->devinfo;
1935 ide_drive_t *drive = info->drive;
1936 struct gendisk *g = info->disk;
1939 if (devinfo->handle == drive)
1940 unregister_cdrom(devinfo);
1941 drive->dsc_overlap = 0;
1942 drive->driver_data = NULL;
1943 blk_queue_prep_rq(drive->queue, NULL);
1944 g->private_data = NULL;
1949 static int ide_cd_probe(ide_drive_t *);
1951 static ide_driver_t ide_cdrom_driver = {
1953 .owner = THIS_MODULE,
1954 .name = "ide-cdrom",
1955 .bus = &ide_bus_type,
1957 .probe = ide_cd_probe,
1958 .remove = ide_cd_remove,
1959 .version = IDECD_VERSION,
1961 .supports_dsc_overlap = 1,
1962 .do_request = ide_do_rw_cdrom,
1963 .end_request = ide_end_request,
1964 .error = __ide_error,
1965 .abort = __ide_abort,
1966 #ifdef CONFIG_IDE_PROC_FS
1971 static int idecd_open(struct inode *inode, struct file *file)
1973 struct gendisk *disk = inode->i_bdev->bd_disk;
1974 struct cdrom_info *info;
1977 info = ide_cd_get(disk);
1981 rc = cdrom_open(&info->devinfo, inode, file);
1989 static int idecd_release(struct inode *inode, struct file *file)
1991 struct gendisk *disk = inode->i_bdev->bd_disk;
1992 struct cdrom_info *info = ide_cd_g(disk);
1994 cdrom_release(&info->devinfo, file);
2001 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2003 struct packet_command cgc;
2008 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
2011 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2013 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2017 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
2018 return cdrom_mode_select(cdi, &cgc);
2021 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2023 struct packet_command cgc;
2028 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2030 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2034 spindown = buffer[11] & 0x0f;
2035 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2040 static int idecd_ioctl(struct inode *inode, struct file *file,
2041 unsigned int cmd, unsigned long arg)
2043 struct block_device *bdev = inode->i_bdev;
2044 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2048 case CDROMSETSPINDOWN:
2049 return idecd_set_spindown(&info->devinfo, arg);
2050 case CDROMGETSPINDOWN:
2051 return idecd_get_spindown(&info->devinfo, arg);
2056 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2058 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2063 static int idecd_media_changed(struct gendisk *disk)
2065 struct cdrom_info *info = ide_cd_g(disk);
2066 return cdrom_media_changed(&info->devinfo);
2069 static int idecd_revalidate_disk(struct gendisk *disk)
2071 struct cdrom_info *info = ide_cd_g(disk);
2072 struct request_sense sense;
2074 ide_cd_read_toc(info->drive, &sense);
2079 static struct block_device_operations idecd_ops = {
2080 .owner = THIS_MODULE,
2082 .release = idecd_release,
2083 .ioctl = idecd_ioctl,
2084 .media_changed = idecd_media_changed,
2085 .revalidate_disk = idecd_revalidate_disk
2088 /* module options */
2089 static char *ignore;
2091 module_param(ignore, charp, 0400);
2092 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2094 static int ide_cd_probe(ide_drive_t *drive)
2096 struct cdrom_info *info;
2098 struct request_sense sense;
2100 if (!strstr("ide-cdrom", drive->driver_req))
2102 if (!drive->present)
2104 if (drive->media != ide_cdrom && drive->media != ide_optical)
2106 /* skip drives that we were told to ignore */
2107 if (ignore != NULL) {
2108 if (strstr(ignore, drive->name)) {
2109 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2114 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2116 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2121 g = alloc_disk(1 << PARTN_BITS);
2125 ide_init_disk(g, drive);
2127 ide_proc_register_driver(drive, &ide_cdrom_driver);
2129 kref_init(&info->kref);
2131 info->drive = drive;
2132 info->driver = &ide_cdrom_driver;
2135 g->private_data = &info->driver;
2137 drive->driver_data = info;
2140 g->driverfs_dev = &drive->gendev;
2141 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2142 if (ide_cdrom_setup(drive)) {
2143 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2144 ide_cd_release(&info->kref);
2148 ide_cd_read_toc(drive, &sense);
2149 g->fops = &idecd_ops;
2150 g->flags |= GENHD_FL_REMOVABLE;
2160 static void __exit ide_cdrom_exit(void)
2162 driver_unregister(&ide_cdrom_driver.gen_driver);
2165 static int __init ide_cdrom_init(void)
2167 return driver_register(&ide_cdrom_driver.gen_driver);
2170 MODULE_ALIAS("ide:*m-cdrom*");
2171 MODULE_ALIAS("ide-cd");
2172 module_init(ide_cdrom_init);
2173 module_exit(ide_cdrom_exit);
2174 MODULE_LICENSE("GPL");