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 struct cdrom_info *info = drive->driver_data;
521 ide_hwif_t *hwif = drive->hwif;
523 /* FIXME: for Virtual DMA we must check harder */
525 info->dma = !hwif->dma_ops->dma_setup(drive);
527 /* set up the controller registers */
528 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL,
531 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
532 /* waiting for CDB interrupt, not DMA yet. */
534 drive->waiting_for_dma = 0;
537 ide_execute_command(drive, WIN_PACKETCMD, handler,
538 ATAPI_WAIT_PC, cdrom_timer_expiry);
541 ide_execute_pkt_cmd(drive);
543 return (*handler) (drive);
548 * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device
549 * registers must have already been prepared by cdrom_start_packet_command.
550 * HANDLER is the interrupt handler to call when the command completes or
551 * there's data ready.
553 #define ATAPI_MIN_CDB_BYTES 12
554 static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive,
556 ide_handler_t *handler)
558 ide_hwif_t *hwif = drive->hwif;
560 struct cdrom_info *info = drive->driver_data;
561 ide_startstop_t startstop;
563 if (info->cd_flags & IDE_CD_FLAG_DRQ_INTERRUPT) {
565 * Here we should have been called after receiving an interrupt
566 * from the device. DRQ should how be set.
569 /* check for errors */
570 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
573 /* ok, next interrupt will be DMA interrupt */
575 drive->waiting_for_dma = 1;
577 /* otherwise, we must wait for DRQ to get set */
578 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
579 BUSY_STAT, WAIT_READY))
583 /* arm the interrupt handler */
584 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
586 /* ATAPI commands get padded out to 12 bytes minimum */
587 cmd_len = COMMAND_SIZE(rq->cmd[0]);
588 if (cmd_len < ATAPI_MIN_CDB_BYTES)
589 cmd_len = ATAPI_MIN_CDB_BYTES;
591 /* send the command to the device */
592 hwif->output_data(drive, NULL, rq->cmd, cmd_len);
594 /* start the DMA if need be */
596 hwif->dma_ops->dma_start(drive);
602 * Check the contents of the interrupt reason register from the cdrom
603 * and attempt to recover if there are problems. Returns 0 if everything's
604 * ok; nonzero if the request has been terminated.
606 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
607 int len, int ireason, int rw)
610 * ireason == 0: the drive wants to receive data from us
611 * ireason == 2: the drive is expecting to transfer data to us
613 if (ireason == (!rw << 1))
615 else if (ireason == (rw << 1)) {
618 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
619 drive->name, __func__);
621 ide_pad_transfer(drive, rw, len);
622 } else if (rw == 0 && ireason == 1) {
624 * Some drives (ASUS) seem to tell us that status info is
625 * available. Just get it and ignore.
627 (void)ide_read_status(drive);
630 /* drive wants a command packet, or invalid ireason... */
631 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
632 drive->name, __func__, ireason);
635 if (rq->cmd_type == REQ_TYPE_ATA_PC)
636 rq->cmd_flags |= REQ_FAILED;
638 cdrom_end_request(drive, 0);
643 * Assume that the drive will always provide data in multiples of at least
644 * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
646 static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
648 struct cdrom_info *cd = drive->driver_data;
650 if ((len % SECTOR_SIZE) == 0)
653 printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
654 drive->name, __func__, len);
656 if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
657 printk(KERN_ERR " This drive is not supported by "
658 "this version of the driver\n");
660 printk(KERN_ERR " Trying to limit transfer sizes\n");
661 cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
667 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *);
670 * Routine to send a read/write packet command to the drive. This is usually
671 * called directly from cdrom_start_{read,write}(). However, for drq_interrupt
672 * devices, it is called from an interrupt when the drive is ready to accept
675 static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive)
677 struct request *rq = HWGROUP(drive)->rq;
679 if (rq_data_dir(rq) == READ) {
680 unsigned short sectors_per_frame =
681 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
682 int nskip = rq->sector & (sectors_per_frame - 1);
685 * If the requested sector doesn't start on a frame boundary,
686 * we must adjust the start of the transfer so that it does,
687 * and remember to skip the first few sectors.
689 * If the rq->current_nr_sectors field is larger than the size
690 * of the buffer, it will mean that we're to skip a number of
691 * sectors equal to the amount by which rq->current_nr_sectors
692 * is larger than the buffer size.
695 /* sanity check... */
696 if (rq->current_nr_sectors !=
697 bio_cur_sectors(rq->bio)) {
698 printk(KERN_ERR "%s: %s: buffer botch (%u)\n",
699 drive->name, __func__,
700 rq->current_nr_sectors);
701 cdrom_end_request(drive, 0);
704 rq->current_nr_sectors += nskip;
709 /* the immediate bit */
712 /* set up the command */
713 rq->timeout = ATAPI_WAIT_PC;
715 /* send the command to the drive and return */
716 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
719 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
720 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
721 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
723 static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive)
725 struct cdrom_info *info = drive->driver_data;
727 static int retry = 10;
729 if (cdrom_decode_status(drive, 0, &stat))
732 info->cd_flags |= IDE_CD_FLAG_SEEKING;
734 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
736 drive->dsc_overlap = 0;
741 static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive)
743 struct request *rq = HWGROUP(drive)->rq;
744 sector_t frame = rq->sector;
746 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
748 memset(rq->cmd, 0, BLK_MAX_CDB);
749 rq->cmd[0] = GPCMD_SEEK;
750 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
752 rq->timeout = ATAPI_WAIT_PC;
753 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
756 static ide_startstop_t cdrom_start_seek(ide_drive_t *drive, unsigned int block)
758 struct cdrom_info *info = drive->driver_data;
761 info->start_seek = jiffies;
762 return cdrom_start_packet_command(drive, 0,
763 cdrom_start_seek_continuation);
767 * Fix up a possibly partially-processed request so that we can start it over
768 * entirely, or even put it back on the request queue.
770 static void restore_request(struct request *rq)
772 if (rq->buffer != bio_data(rq->bio)) {
774 (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
776 rq->buffer = bio_data(rq->bio);
780 rq->current_nr_sectors = bio_cur_sectors(rq->bio);
781 rq->hard_cur_sectors = rq->current_nr_sectors;
782 rq->hard_nr_sectors = rq->nr_sectors;
783 rq->hard_sector = rq->sector;
784 rq->q->prep_rq_fn(rq->q, rq);
788 * All other packet commands.
790 static void ide_cd_request_sense_fixup(struct request *rq)
793 * Some of the trailing request sense fields are optional,
794 * and some drives don't send them. Sigh.
796 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
797 rq->data_len > 0 && rq->data_len <= 5)
798 while (rq->data_len > 0) {
799 *(u8 *)rq->data++ = 0;
804 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
805 int write, void *buffer, unsigned *bufflen,
806 struct request_sense *sense, int timeout,
807 unsigned int cmd_flags)
809 struct cdrom_info *info = drive->driver_data;
810 struct request_sense local_sense;
812 unsigned int flags = 0;
815 sense = &local_sense;
817 /* start of retry loop */
822 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
824 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
825 rq->cmd_type = REQ_TYPE_ATA_PC;
827 rq->cmd_flags |= cmd_flags;
828 rq->timeout = timeout;
831 rq->data_len = *bufflen;
834 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
837 *bufflen = rq->data_len;
839 flags = rq->cmd_flags;
843 * FIXME: we should probably abort/retry or something in case of
846 if (flags & REQ_FAILED) {
848 * The request failed. Retry if it was due to a unit
849 * attention status (usually means media was changed).
851 struct request_sense *reqbuf = sense;
853 if (reqbuf->sense_key == UNIT_ATTENTION)
854 cdrom_saw_media_change(drive);
855 else if (reqbuf->sense_key == NOT_READY &&
856 reqbuf->asc == 4 && reqbuf->ascq != 4) {
858 * The drive is in the process of loading
859 * a disk. Retry, but wait a little to give
860 * the drive time to complete the load.
864 /* otherwise, don't retry */
870 /* end of retry loop */
871 } while ((flags & REQ_FAILED) && retries >= 0);
873 /* return an error if the command failed */
874 return (flags & REQ_FAILED) ? -EIO : 0;
878 * Called from blk_end_request_callback() after the data of the request is
879 * completed and before the request itself is completed. By returning value '1',
880 * blk_end_request_callback() returns immediately without completing it.
882 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
887 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
889 ide_hwif_t *hwif = drive->hwif;
890 struct cdrom_info *info = drive->driver_data;
891 struct request *rq = HWGROUP(drive)->rq;
892 xfer_func_t *xferfunc;
893 ide_expiry_t *expiry = NULL;
894 int dma_error = 0, dma, stat, ireason, len, thislen, uptodate = 0;
895 int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
896 unsigned int timeout;
899 /* check for errors */
903 dma_error = hwif->dma_ops->dma_end(drive);
905 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
906 write ? "write" : "read");
911 if (cdrom_decode_status(drive, 0, &stat))
914 /* using dma, transfer is complete now */
917 return ide_error(drive, "dma error", stat);
918 if (blk_fs_request(rq)) {
919 ide_end_request(drive, 1, rq->nr_sectors);
925 /* ok we fall to pio :/ */
926 ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
927 lowcyl = hwif->INB(hwif->io_ports.lbam_addr);
928 highcyl = hwif->INB(hwif->io_ports.lbah_addr);
930 len = lowcyl + (256 * highcyl);
932 thislen = blk_fs_request(rq) ? len : rq->data_len;
936 /* If DRQ is clear, the command has completed. */
937 if ((stat & DRQ_STAT) == 0) {
938 if (blk_fs_request(rq)) {
940 * If we're not done reading/writing, complain.
941 * Otherwise, complete the command normally.
944 if (rq->current_nr_sectors > 0) {
945 printk(KERN_ERR "%s: %s: data underrun "
947 drive->name, __func__,
948 rq->current_nr_sectors);
950 rq->cmd_flags |= REQ_FAILED;
953 cdrom_end_request(drive, uptodate);
955 } else if (!blk_pc_request(rq)) {
956 ide_cd_request_sense_fixup(rq);
957 /* complain if we still have data left to transfer */
958 uptodate = rq->data_len ? 0 : 1;
963 /* check which way to transfer data */
964 if (ide_cd_check_ireason(drive, rq, len, ireason, write))
967 if (blk_fs_request(rq)) {
971 if (ide_cd_check_transfer_size(drive, len)) {
972 cdrom_end_request(drive, 0);
977 * First, figure out if we need to bit-bucket
978 * any of the leading sectors.
980 nskip = min_t(int, rq->current_nr_sectors
981 - bio_cur_sectors(rq->bio),
984 ide_pad_transfer(drive, write, nskip << 9);
985 rq->current_nr_sectors -= nskip;
986 thislen -= (nskip << 9);
993 xferfunc = hwif->output_data;
996 xferfunc = hwif->input_data;
1000 while (thislen > 0) {
1001 u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
1002 int blen = rq->data_len;
1006 if (blk_fs_request(rq)) {
1008 blen = rq->current_nr_sectors << 9;
1010 ptr = bio_data(rq->bio);
1011 blen = bio_iovec(rq->bio)->bv_len;
1016 if (blk_fs_request(rq) && !write)
1018 * If the buffers are full, pipe the rest into
1021 ide_pad_transfer(drive, 0, thislen);
1023 printk(KERN_ERR "%s: confused, missing data\n",
1025 blk_dump_rq_flags(rq, rq_data_dir(rq)
1026 ? "cdrom_newpc_intr, write"
1027 : "cdrom_newpc_intr, read");
1035 xferfunc(drive, NULL, ptr, blen);
1040 if (blk_fs_request(rq)) {
1042 rq->nr_sectors -= (blen >> 9);
1043 rq->current_nr_sectors -= (blen >> 9);
1044 rq->sector += (blen >> 9);
1046 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1047 cdrom_end_request(drive, 1);
1049 rq->data_len -= blen;
1052 * The request can't be completed until DRQ is cleared.
1053 * So complete the data, but don't complete the request
1054 * using the dummy function for the callback feature
1055 * of blk_end_request_callback().
1058 blk_end_request_callback(rq, 0, blen,
1059 cdrom_newpc_intr_dummy_cb);
1063 if (!write && blk_sense_request(rq))
1064 rq->sense_len += blen;
1067 /* pad, if necessary */
1068 if (!blk_fs_request(rq) && len > 0)
1069 ide_pad_transfer(drive, write, len);
1071 if (blk_pc_request(rq)) {
1072 timeout = rq->timeout;
1074 timeout = ATAPI_WAIT_PC;
1075 if (!blk_fs_request(rq))
1076 expiry = cdrom_timer_expiry;
1079 ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry);
1083 if (blk_pc_request(rq)) {
1084 unsigned long flags;
1085 unsigned int dlen = rq->data_len;
1090 spin_lock_irqsave(&ide_lock, flags);
1091 if (__blk_end_request(rq, 0, dlen))
1093 HWGROUP(drive)->rq = NULL;
1094 spin_unlock_irqrestore(&ide_lock, flags);
1097 rq->cmd_flags |= REQ_FAILED;
1098 cdrom_end_request(drive, uptodate);
1103 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
1105 struct cdrom_info *cd = drive->driver_data;
1106 int write = rq_data_dir(rq) == WRITE;
1107 unsigned short sectors_per_frame =
1108 queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1111 /* disk has become write protected */
1112 if (cd->disk->policy) {
1113 cdrom_end_request(drive, 0);
1118 * We may be retrying this request after an error. Fix up any
1119 * weirdness which might be present in the request packet.
1121 restore_request(rq);
1124 /* use DMA, if possible / writes *must* be hardware frame aligned */
1125 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1126 (rq->sector & (sectors_per_frame - 1))) {
1128 cdrom_end_request(drive, 0);
1133 cd->dma = drive->using_dma;
1136 cd->devinfo.media_written = 1;
1138 /* start sending the read/write request to the drive */
1139 return cdrom_start_packet_command(drive, 32768, cdrom_start_rw_cont);
1142 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1144 struct request *rq = HWGROUP(drive)->rq;
1147 rq->timeout = ATAPI_WAIT_PC;
1149 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1152 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1154 struct cdrom_info *info = drive->driver_data;
1156 if (blk_pc_request(rq))
1157 rq->cmd_flags |= REQ_QUIET;
1159 rq->cmd_flags &= ~REQ_FAILED;
1164 if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
1165 struct request_queue *q = drive->queue;
1166 unsigned int alignment;
1168 unsigned long stack_mask = ~(THREAD_SIZE - 1);
1171 addr = (unsigned long)bio_data(rq->bio);
1173 addr = (unsigned long)rq->data;
1175 info->dma = drive->using_dma;
1178 * check if dma is safe
1180 * NOTE! The "len" and "addr" checks should possibly have
1183 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
1184 if (addr & alignment || rq->data_len & alignment)
1187 if (!((addr & stack_mask) ^
1188 ((unsigned long)current->stack & stack_mask)))
1192 /* start sending the command to the drive */
1193 return cdrom_start_packet_command(drive, rq->data_len,
1194 cdrom_do_newpc_cont);
1198 * cdrom driver request routine.
1200 static ide_startstop_t ide_do_rw_cdrom(ide_drive_t *drive, struct request *rq,
1203 ide_startstop_t action;
1204 struct cdrom_info *info = drive->driver_data;
1206 if (blk_fs_request(rq)) {
1207 if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
1208 unsigned long elapsed = jiffies - info->start_seek;
1209 int stat = ide_read_status(drive);
1211 if ((stat & SEEK_STAT) != SEEK_STAT) {
1212 if (elapsed < IDECD_SEEK_TIMEOUT) {
1213 ide_stall_queue(drive,
1217 printk(KERN_ERR "%s: DSC timeout\n",
1220 info->cd_flags &= ~IDE_CD_FLAG_SEEKING;
1222 if (rq_data_dir(rq) == READ &&
1223 IDE_LARGE_SEEK(info->last_block, block,
1224 IDECD_SEEK_THRESHOLD) &&
1226 action = cdrom_start_seek(drive, block);
1228 action = cdrom_start_rw(drive, rq);
1229 info->last_block = block;
1231 } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
1232 rq->cmd_type == REQ_TYPE_ATA_PC) {
1233 return cdrom_do_block_pc(drive, rq);
1234 } else if (blk_special_request(rq)) {
1235 /* right now this can only be a reset... */
1236 cdrom_end_request(drive, 1);
1240 blk_dump_rq_flags(rq, "ide-cd bad flags");
1241 cdrom_end_request(drive, 0);
1250 * Routines which queue packet commands take as a final argument a pointer to a
1251 * request_sense struct. If execution of the command results in an error with a
1252 * CHECK CONDITION status, this structure will be filled with the results of the
1253 * subsequent request sense command. The pointer can also be NULL, in which case
1254 * no sense information is returned.
1256 static void msf_from_bcd(struct atapi_msf *msf)
1258 msf->minute = BCD2BIN(msf->minute);
1259 msf->second = BCD2BIN(msf->second);
1260 msf->frame = BCD2BIN(msf->frame);
1263 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1265 struct cdrom_info *info = drive->driver_data;
1266 struct cdrom_device_info *cdi = &info->devinfo;
1267 unsigned char cmd[BLK_MAX_CDB];
1269 memset(cmd, 0, BLK_MAX_CDB);
1270 cmd[0] = GPCMD_TEST_UNIT_READY;
1273 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
1274 * instead of supporting the LOAD_UNLOAD opcode.
1276 cmd[7] = cdi->sanyo_slot % 3;
1278 return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, REQ_QUIET);
1281 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1282 unsigned long *sectors_per_frame,
1283 struct request_sense *sense)
1291 unsigned char cmd[BLK_MAX_CDB];
1292 unsigned len = sizeof(capbuf);
1294 memset(cmd, 0, BLK_MAX_CDB);
1295 cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1297 stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
1300 *capacity = 1 + be32_to_cpu(capbuf.lba);
1301 *sectors_per_frame =
1302 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1308 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1309 int format, char *buf, int buflen,
1310 struct request_sense *sense)
1312 unsigned char cmd[BLK_MAX_CDB];
1314 memset(cmd, 0, BLK_MAX_CDB);
1316 cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1318 cmd[7] = (buflen >> 8);
1319 cmd[8] = (buflen & 0xff);
1320 cmd[9] = (format << 6);
1325 return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
1328 /* Try to read the entire TOC for the disk into our internal buffer. */
1329 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
1331 int stat, ntracks, i;
1332 struct cdrom_info *info = drive->driver_data;
1333 struct cdrom_device_info *cdi = &info->devinfo;
1334 struct atapi_toc *toc = info->toc;
1336 struct atapi_toc_header hdr;
1337 struct atapi_toc_entry ent;
1340 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1343 /* try to allocate space */
1344 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1346 printk(KERN_ERR "%s: No cdrom TOC buffer!\n",
1354 * Check to see if the existing data is still valid. If it is,
1357 (void) cdrom_check_status(drive, sense);
1359 if (info->cd_flags & IDE_CD_FLAG_TOC_VALID)
1362 /* try to get the total cdrom capacity and sector size */
1363 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
1366 toc->capacity = 0x1fffff;
1368 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1369 /* save a private copy of the TOC capacity for error handling */
1370 drive->probed_capacity = toc->capacity * sectors_per_frame;
1372 blk_queue_hardsect_size(drive->queue,
1373 sectors_per_frame << SECTOR_BITS);
1375 /* first read just the header, so we know how long the TOC is */
1376 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1377 sizeof(struct atapi_toc_header), sense);
1381 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1382 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1383 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1386 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1389 if (ntracks > MAX_TRACKS)
1390 ntracks = MAX_TRACKS;
1392 /* now read the whole schmeer */
1393 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1395 sizeof(struct atapi_toc_header) +
1397 sizeof(struct atapi_toc_entry), sense);
1399 if (stat && toc->hdr.first_track > 1) {
1401 * Cds with CDI tracks only don't have any TOC entries, despite
1402 * of this the returned values are
1403 * first_track == last_track = number of CDI tracks + 1,
1404 * so that this case is indistinguishable from the same layout
1405 * plus an additional audio track. If we get an error for the
1406 * regular case, we assume a CDI without additional audio
1407 * tracks. In this case the readable TOC is empty (CDI tracks
1408 * are not included) and only holds the Leadout entry.
1413 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1415 sizeof(struct atapi_toc_header) +
1417 sizeof(struct atapi_toc_entry),
1422 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1423 toc->hdr.first_track = (u8)BIN2BCD(CDROM_LEADOUT);
1424 toc->hdr.last_track = (u8)BIN2BCD(CDROM_LEADOUT);
1426 toc->hdr.first_track = CDROM_LEADOUT;
1427 toc->hdr.last_track = CDROM_LEADOUT;
1434 toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1436 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD) {
1437 toc->hdr.first_track = BCD2BIN(toc->hdr.first_track);
1438 toc->hdr.last_track = BCD2BIN(toc->hdr.last_track);
1441 for (i = 0; i <= ntracks; i++) {
1442 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1443 if (info->cd_flags & IDE_CD_FLAG_TOCTRACKS_AS_BCD)
1444 toc->ent[i].track = BCD2BIN(toc->ent[i].track);
1445 msf_from_bcd(&toc->ent[i].addr.msf);
1447 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1448 toc->ent[i].addr.msf.second,
1449 toc->ent[i].addr.msf.frame);
1452 if (toc->hdr.first_track != CDROM_LEADOUT) {
1453 /* read the multisession information */
1454 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1455 sizeof(ms_tmp), sense);
1459 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1461 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1462 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1463 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1466 if (info->cd_flags & IDE_CD_FLAG_TOCADDR_AS_BCD) {
1467 /* re-read multisession information using MSF format */
1468 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1469 sizeof(ms_tmp), sense);
1473 msf_from_bcd(&ms_tmp.ent.addr.msf);
1474 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1475 ms_tmp.ent.addr.msf.second,
1476 ms_tmp.ent.addr.msf.frame);
1479 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1481 /* now try to get the total cdrom capacity */
1482 stat = cdrom_get_last_written(cdi, &last_written);
1483 if (!stat && (last_written > toc->capacity)) {
1484 toc->capacity = last_written;
1485 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1486 drive->probed_capacity = toc->capacity * sectors_per_frame;
1489 /* Remember that we've read this stuff. */
1490 info->cd_flags |= IDE_CD_FLAG_TOC_VALID;
1495 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1497 struct cdrom_info *info = drive->driver_data;
1498 struct cdrom_device_info *cdi = &info->devinfo;
1499 struct packet_command cgc;
1500 int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1502 if ((info->cd_flags & IDE_CD_FLAG_FULL_CAPS_PAGE) == 0)
1503 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1505 init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1507 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1508 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1511 } while (--attempts);
1515 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1517 struct cdrom_info *cd = drive->driver_data;
1518 u16 curspeed, maxspeed;
1520 curspeed = *(u16 *)&buf[8 + 14];
1521 maxspeed = *(u16 *)&buf[8 + 8];
1523 if (cd->cd_flags & IDE_CD_FLAG_LE_SPEED_FIELDS) {
1524 curspeed = le16_to_cpu(curspeed);
1525 maxspeed = le16_to_cpu(maxspeed);
1527 curspeed = be16_to_cpu(curspeed);
1528 maxspeed = be16_to_cpu(maxspeed);
1531 cd->current_speed = (curspeed + (176/2)) / 176;
1532 cd->max_speed = (maxspeed + (176/2)) / 176;
1535 #define IDE_CD_CAPABILITIES \
1536 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1537 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1538 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1539 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1540 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1542 static struct cdrom_device_ops ide_cdrom_dops = {
1543 .open = ide_cdrom_open_real,
1544 .release = ide_cdrom_release_real,
1545 .drive_status = ide_cdrom_drive_status,
1546 .media_changed = ide_cdrom_check_media_change_real,
1547 .tray_move = ide_cdrom_tray_move,
1548 .lock_door = ide_cdrom_lock_door,
1549 .select_speed = ide_cdrom_select_speed,
1550 .get_last_session = ide_cdrom_get_last_session,
1551 .get_mcn = ide_cdrom_get_mcn,
1552 .reset = ide_cdrom_reset,
1553 .audio_ioctl = ide_cdrom_audio_ioctl,
1554 .capability = IDE_CD_CAPABILITIES,
1555 .generic_packet = ide_cdrom_packet,
1558 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1560 struct cdrom_info *info = drive->driver_data;
1561 struct cdrom_device_info *devinfo = &info->devinfo;
1563 devinfo->ops = &ide_cdrom_dops;
1564 devinfo->speed = info->current_speed;
1565 devinfo->capacity = nslots;
1566 devinfo->handle = drive;
1567 strcpy(devinfo->name, drive->name);
1569 if (info->cd_flags & IDE_CD_FLAG_NO_SPEED_SELECT)
1570 devinfo->mask |= CDC_SELECT_SPEED;
1572 devinfo->disk = info->disk;
1573 return register_cdrom(devinfo);
1576 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1578 struct cdrom_info *cd = drive->driver_data;
1579 struct cdrom_device_info *cdi = &cd->devinfo;
1580 u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1581 mechtype_t mechtype;
1584 cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1585 CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1586 CDC_MO_DRIVE | CDC_RAM);
1588 if (drive->media == ide_optical) {
1589 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1590 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n",
1595 if (cd->cd_flags & IDE_CD_FLAG_PRE_ATAPI12) {
1596 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1597 cdi->mask &= ~CDC_PLAY_AUDIO;
1602 * We have to cheat a little here. the packet will eventually be queued
1603 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1604 * Since this device hasn't been registered with the Uniform layer yet,
1605 * it can't do this. Same goes for cdi->ops.
1607 cdi->handle = drive;
1608 cdi->ops = &ide_cdrom_dops;
1610 if (ide_cdrom_get_capabilities(drive, buf))
1613 if ((buf[8 + 6] & 0x01) == 0)
1614 cd->cd_flags |= IDE_CD_FLAG_NO_DOORLOCK;
1615 if (buf[8 + 6] & 0x08)
1616 cd->cd_flags &= ~IDE_CD_FLAG_NO_EJECT;
1617 if (buf[8 + 3] & 0x01)
1618 cdi->mask &= ~CDC_CD_R;
1619 if (buf[8 + 3] & 0x02)
1620 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1621 if (buf[8 + 2] & 0x38)
1622 cdi->mask &= ~CDC_DVD;
1623 if (buf[8 + 3] & 0x20)
1624 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1625 if (buf[8 + 3] & 0x10)
1626 cdi->mask &= ~CDC_DVD_R;
1627 if ((buf[8 + 4] & 0x01) || (cd->cd_flags & IDE_CD_FLAG_PLAY_AUDIO_OK))
1628 cdi->mask &= ~CDC_PLAY_AUDIO;
1630 mechtype = buf[8 + 6] >> 5;
1631 if (mechtype == mechtype_caddy || mechtype == mechtype_popup)
1632 cdi->mask |= CDC_CLOSE_TRAY;
1634 if (cdi->sanyo_slot > 0) {
1635 cdi->mask &= ~CDC_SELECT_DISC;
1637 } else if (mechtype == mechtype_individual_changer ||
1638 mechtype == mechtype_cartridge_changer) {
1639 nslots = cdrom_number_of_slots(cdi);
1641 cdi->mask &= ~CDC_SELECT_DISC;
1644 ide_cdrom_update_speed(drive, buf);
1646 printk(KERN_INFO "%s: ATAPI", drive->name);
1648 /* don't print speed if the drive reported 0 */
1650 printk(KERN_CONT " %dX", cd->max_speed);
1652 printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1654 if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1655 printk(KERN_CONT " DVD%s%s",
1656 (cdi->mask & CDC_DVD_R) ? "" : "-R",
1657 (cdi->mask & CDC_DVD_RAM) ? "" : "-RAM");
1659 if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1660 printk(KERN_CONT " CD%s%s",
1661 (cdi->mask & CDC_CD_R) ? "" : "-R",
1662 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1664 if ((cdi->mask & CDC_SELECT_DISC) == 0)
1665 printk(KERN_CONT " changer w/%d slots", nslots);
1667 printk(KERN_CONT " drive");
1669 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(*(u16 *)&buf[8 + 12]));
1674 /* standard prep_rq_fn that builds 10 byte cmds */
1675 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1677 int hard_sect = queue_hardsect_size(q);
1678 long block = (long)rq->hard_sector / (hard_sect >> 9);
1679 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
1681 memset(rq->cmd, 0, BLK_MAX_CDB);
1683 if (rq_data_dir(rq) == READ)
1684 rq->cmd[0] = GPCMD_READ_10;
1686 rq->cmd[0] = GPCMD_WRITE_10;
1691 rq->cmd[2] = (block >> 24) & 0xff;
1692 rq->cmd[3] = (block >> 16) & 0xff;
1693 rq->cmd[4] = (block >> 8) & 0xff;
1694 rq->cmd[5] = block & 0xff;
1697 * and transfer length
1699 rq->cmd[7] = (blocks >> 8) & 0xff;
1700 rq->cmd[8] = blocks & 0xff;
1706 * Most of the SCSI commands are supported directly by ATAPI devices.
1707 * This transform handles the few exceptions.
1709 static int ide_cdrom_prep_pc(struct request *rq)
1713 /* transform 6-byte read/write commands to the 10-byte version */
1714 if (c[0] == READ_6 || c[0] == WRITE_6) {
1721 c[0] += (READ_10 - READ_6);
1727 * it's silly to pretend we understand 6-byte sense commands, just
1728 * reject with ILLEGAL_REQUEST and the caller should take the
1729 * appropriate action
1731 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1732 rq->errors = ILLEGAL_REQUEST;
1733 return BLKPREP_KILL;
1739 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1741 if (blk_fs_request(rq))
1742 return ide_cdrom_prep_fs(q, rq);
1743 else if (blk_pc_request(rq))
1744 return ide_cdrom_prep_pc(rq);
1749 struct cd_list_entry {
1750 const char *id_model;
1751 const char *id_firmware;
1752 unsigned int cd_flags;
1755 #ifdef CONFIG_IDE_PROC_FS
1756 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1758 unsigned long capacity, sectors_per_frame;
1760 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
1763 return capacity * sectors_per_frame;
1766 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1767 int count, int *eof, void *data)
1769 ide_drive_t *drive = data;
1772 len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1773 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1776 static ide_proc_entry_t idecd_proc[] = {
1777 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1778 { NULL, 0, NULL, NULL }
1781 static void ide_cdrom_add_settings(ide_drive_t *drive)
1783 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
1784 &drive->dsc_overlap, NULL);
1787 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
1790 static const struct cd_list_entry ide_cd_quirks_list[] = {
1791 /* Limit transfer size per interrupt. */
1792 { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1793 { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_CD_FLAG_LIMIT_NFRAMES },
1794 /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1795 { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_CD_FLAG_NO_SPEED_SELECT },
1796 /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1797 { "NEC CD-ROM DRIVE:260", "1.01", IDE_CD_FLAG_TOCADDR_AS_BCD |
1798 IDE_CD_FLAG_PRE_ATAPI12, },
1799 /* Vertos 300, some versions of this drive like to talk BCD. */
1800 { "V003S0DS", NULL, IDE_CD_FLAG_VERTOS_300_SSD, },
1801 /* Vertos 600 ESD. */
1802 { "V006E0DS", NULL, IDE_CD_FLAG_VERTOS_600_ESD, },
1804 * Sanyo 3 CD changer uses a non-standard command for CD changing
1805 * (by default standard ATAPI support for CD changers is used).
1807 { "CD-ROM CDR-C3 G", NULL, IDE_CD_FLAG_SANYO_3CD },
1808 { "CD-ROM CDR-C3G", NULL, IDE_CD_FLAG_SANYO_3CD },
1809 { "CD-ROM CDR_C36", NULL, IDE_CD_FLAG_SANYO_3CD },
1810 /* Stingray 8X CD-ROM. */
1811 { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_CD_FLAG_PRE_ATAPI12},
1813 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1814 * mode sense page capabilities size, but older drives break.
1816 { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1817 { "WPI CDS-32X", NULL, IDE_CD_FLAG_FULL_CAPS_PAGE },
1818 /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1819 { "", "241N", IDE_CD_FLAG_LE_SPEED_FIELDS },
1821 * Some drives used by Apple don't advertise audio play
1822 * but they do support reading TOC & audio datas.
1824 { "MATSHITADVD-ROM SR-8187", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1825 { "MATSHITADVD-ROM SR-8186", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1826 { "MATSHITADVD-ROM SR-8176", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1827 { "MATSHITADVD-ROM SR-8174", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1828 { "Optiarc DVD RW AD-5200A", NULL, IDE_CD_FLAG_PLAY_AUDIO_OK },
1832 static unsigned int ide_cd_flags(struct hd_driveid *id)
1834 const struct cd_list_entry *cle = ide_cd_quirks_list;
1836 while (cle->id_model) {
1837 if (strcmp(cle->id_model, id->model) == 0 &&
1838 (cle->id_firmware == NULL ||
1839 strstr(id->fw_rev, cle->id_firmware)))
1840 return cle->cd_flags;
1847 static int ide_cdrom_setup(ide_drive_t *drive)
1849 struct cdrom_info *cd = drive->driver_data;
1850 struct cdrom_device_info *cdi = &cd->devinfo;
1851 struct hd_driveid *id = drive->id;
1854 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
1855 blk_queue_dma_alignment(drive->queue, 31);
1856 blk_queue_update_dma_pad(drive->queue, 15);
1857 drive->queue->unplug_delay = (1 * HZ) / 1000;
1858 if (!drive->queue->unplug_delay)
1859 drive->queue->unplug_delay = 1;
1861 drive->special.all = 0;
1863 cd->cd_flags = IDE_CD_FLAG_MEDIA_CHANGED | IDE_CD_FLAG_NO_EJECT |
1866 if ((id->config & 0x0060) == 0x20)
1867 cd->cd_flags |= IDE_CD_FLAG_DRQ_INTERRUPT;
1869 if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_300_SSD) &&
1870 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1871 cd->cd_flags |= (IDE_CD_FLAG_TOCTRACKS_AS_BCD |
1872 IDE_CD_FLAG_TOCADDR_AS_BCD);
1873 else if ((cd->cd_flags & IDE_CD_FLAG_VERTOS_600_ESD) &&
1874 id->fw_rev[4] == '1' && id->fw_rev[6] <= '2')
1875 cd->cd_flags |= IDE_CD_FLAG_TOCTRACKS_AS_BCD;
1876 else if (cd->cd_flags & IDE_CD_FLAG_SANYO_3CD)
1877 /* 3 => use CD in slot 0 */
1878 cdi->sanyo_slot = 3;
1880 nslots = ide_cdrom_probe_capabilities(drive);
1882 /* set correct block size */
1883 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
1885 drive->dsc_overlap = (drive->next != drive);
1887 if (ide_cdrom_register(drive, nslots)) {
1888 printk(KERN_ERR "%s: %s failed to register device with the"
1889 " cdrom driver.\n", drive->name, __func__);
1890 cd->devinfo.handle = NULL;
1893 ide_cdrom_add_settings(drive);
1897 static void ide_cd_remove(ide_drive_t *drive)
1899 struct cdrom_info *info = drive->driver_data;
1901 ide_proc_unregister_driver(drive, info->driver);
1903 del_gendisk(info->disk);
1908 static void ide_cd_release(struct kref *kref)
1910 struct cdrom_info *info = to_ide_cd(kref);
1911 struct cdrom_device_info *devinfo = &info->devinfo;
1912 ide_drive_t *drive = info->drive;
1913 struct gendisk *g = info->disk;
1916 if (devinfo->handle == drive)
1917 unregister_cdrom(devinfo);
1918 drive->dsc_overlap = 0;
1919 drive->driver_data = NULL;
1920 blk_queue_prep_rq(drive->queue, NULL);
1921 g->private_data = NULL;
1926 static int ide_cd_probe(ide_drive_t *);
1928 static ide_driver_t ide_cdrom_driver = {
1930 .owner = THIS_MODULE,
1931 .name = "ide-cdrom",
1932 .bus = &ide_bus_type,
1934 .probe = ide_cd_probe,
1935 .remove = ide_cd_remove,
1936 .version = IDECD_VERSION,
1938 .supports_dsc_overlap = 1,
1939 .do_request = ide_do_rw_cdrom,
1940 .end_request = ide_end_request,
1941 .error = __ide_error,
1942 .abort = __ide_abort,
1943 #ifdef CONFIG_IDE_PROC_FS
1948 static int idecd_open(struct inode *inode, struct file *file)
1950 struct gendisk *disk = inode->i_bdev->bd_disk;
1951 struct cdrom_info *info;
1954 info = ide_cd_get(disk);
1958 rc = cdrom_open(&info->devinfo, inode, file);
1966 static int idecd_release(struct inode *inode, struct file *file)
1968 struct gendisk *disk = inode->i_bdev->bd_disk;
1969 struct cdrom_info *info = ide_cd_g(disk);
1971 cdrom_release(&info->devinfo, file);
1978 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1980 struct packet_command cgc;
1985 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1988 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1990 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1994 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1995 return cdrom_mode_select(cdi, &cgc);
1998 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
2000 struct packet_command cgc;
2005 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
2007 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
2011 spindown = buffer[11] & 0x0f;
2012 if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
2017 static int idecd_ioctl(struct inode *inode, struct file *file,
2018 unsigned int cmd, unsigned long arg)
2020 struct block_device *bdev = inode->i_bdev;
2021 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
2025 case CDROMSETSPINDOWN:
2026 return idecd_set_spindown(&info->devinfo, arg);
2027 case CDROMGETSPINDOWN:
2028 return idecd_get_spindown(&info->devinfo, arg);
2033 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
2035 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
2040 static int idecd_media_changed(struct gendisk *disk)
2042 struct cdrom_info *info = ide_cd_g(disk);
2043 return cdrom_media_changed(&info->devinfo);
2046 static int idecd_revalidate_disk(struct gendisk *disk)
2048 struct cdrom_info *info = ide_cd_g(disk);
2049 struct request_sense sense;
2051 ide_cd_read_toc(info->drive, &sense);
2056 static struct block_device_operations idecd_ops = {
2057 .owner = THIS_MODULE,
2059 .release = idecd_release,
2060 .ioctl = idecd_ioctl,
2061 .media_changed = idecd_media_changed,
2062 .revalidate_disk = idecd_revalidate_disk
2065 /* module options */
2066 static char *ignore;
2068 module_param(ignore, charp, 0400);
2069 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
2071 static int ide_cd_probe(ide_drive_t *drive)
2073 struct cdrom_info *info;
2075 struct request_sense sense;
2077 if (!strstr("ide-cdrom", drive->driver_req))
2079 if (!drive->present)
2081 if (drive->media != ide_cdrom && drive->media != ide_optical)
2083 /* skip drives that we were told to ignore */
2084 if (ignore != NULL) {
2085 if (strstr(ignore, drive->name)) {
2086 printk(KERN_INFO "ide-cd: ignoring drive %s\n",
2091 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
2093 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n",
2098 g = alloc_disk(1 << PARTN_BITS);
2102 ide_init_disk(g, drive);
2104 ide_proc_register_driver(drive, &ide_cdrom_driver);
2106 kref_init(&info->kref);
2108 info->drive = drive;
2109 info->driver = &ide_cdrom_driver;
2112 g->private_data = &info->driver;
2114 drive->driver_data = info;
2117 g->driverfs_dev = &drive->gendev;
2118 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
2119 if (ide_cdrom_setup(drive)) {
2120 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
2121 ide_cd_release(&info->kref);
2125 ide_cd_read_toc(drive, &sense);
2126 g->fops = &idecd_ops;
2127 g->flags |= GENHD_FL_REMOVABLE;
2137 static void __exit ide_cdrom_exit(void)
2139 driver_unregister(&ide_cdrom_driver.gen_driver);
2142 static int __init ide_cdrom_init(void)
2144 return driver_register(&ide_cdrom_driver.gen_driver);
2147 MODULE_ALIAS("ide:*m-cdrom*");
2148 MODULE_ALIAS("ide-cd");
2149 module_init(ide_cdrom_init);
2150 module_exit(ide_cdrom_exit);
2151 MODULE_LICENSE("GPL");