2 * linux/drivers/ide/ide-cd.c
4 * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov>
5 * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
6 * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
8 * May be copied or modified under the terms of the GNU General Public
9 * License. See linux/COPYING for more information.
11 * ATAPI CD-ROM driver. To be used with ide.c.
12 * See Documentation/cdrom/ide-cd for usage information.
14 * Suggestions are welcome. Patches that work are more welcome though. ;-)
15 * For those wishing to work on this driver, please be sure you download
16 * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
17 * (SFF-8020i rev 2.6) standards. These documents can be obtained by
19 * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
20 * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
22 * Drives that deviate from these standards will be accommodated as much
23 * as possible via compile time or command-line options. Since I only have
24 * a few drives, you generally need to send me patches...
26 * ----------------------------------
28 * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on
31 * For historical changelog please see:
32 * Documentation/ide/ChangeLog.ide-cd.1994-2004
35 #define IDECD_VERSION "4.61"
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/kernel.h>
40 #include <linux/delay.h>
41 #include <linux/timer.h>
42 #include <linux/slab.h>
43 #include <linux/interrupt.h>
44 #include <linux/errno.h>
45 #include <linux/cdrom.h>
46 #include <linux/ide.h>
47 #include <linux/completion.h>
48 #include <linux/mutex.h>
50 #include <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */
54 #include <asm/byteorder.h>
55 #include <asm/uaccess.h>
56 #include <asm/unaligned.h>
60 static DEFINE_MUTEX(idecd_ref_mutex);
62 #define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
64 #define ide_cd_g(disk) \
65 container_of((disk)->private_data, struct cdrom_info, driver)
67 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
69 struct cdrom_info *cd = NULL;
71 mutex_lock(&idecd_ref_mutex);
75 mutex_unlock(&idecd_ref_mutex);
79 static void ide_cd_release(struct kref *);
81 static void ide_cd_put(struct cdrom_info *cd)
83 mutex_lock(&idecd_ref_mutex);
84 kref_put(&cd->kref, ide_cd_release);
85 mutex_unlock(&idecd_ref_mutex);
88 /****************************************************************************
89 * Generic packet command support and error handling routines.
92 /* Mark that we've seen a media change, and invalidate our internal
94 static void cdrom_saw_media_change (ide_drive_t *drive)
96 struct cdrom_info *info = drive->driver_data;
98 CDROM_STATE_FLAGS (drive)->media_changed = 1;
99 CDROM_STATE_FLAGS (drive)->toc_valid = 0;
100 info->nsectors_buffered = 0;
103 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
104 struct request_sense *sense)
108 if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
111 switch (sense->sense_key) {
112 case NO_SENSE: case RECOVERED_ERROR:
116 * don't care about tray state messages for
117 * e.g. capacity commands or in-progress or
120 if (sense->asc == 0x3a || sense->asc == 0x04)
124 case ILLEGAL_REQUEST:
126 * don't log START_STOP unit with LoEj set, since
127 * we cannot reliably check if drive can auto-close
129 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
135 * Make good and sure we've seen this potential media
136 * change. Some drives (i.e. Creative) fail to present
137 * the correct sense key in the error register.
139 cdrom_saw_media_change(drive);
149 void cdrom_analyze_sense_data(ide_drive_t *drive,
150 struct request *failed_command,
151 struct request_sense *sense)
153 unsigned long sector;
154 unsigned long bio_sectors;
156 struct cdrom_info *info = drive->driver_data;
158 if (!cdrom_log_sense(drive, failed_command, sense))
162 * If a read toc is executed for a CD-R or CD-RW medium where
163 * the first toc has not been recorded yet, it will fail with
164 * 05/24/00 (which is a confusing error)
166 if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
167 if (sense->sense_key == 0x05 && sense->asc == 0x24)
170 if (sense->error_code == 0x70) { /* Current Error */
171 switch(sense->sense_key) {
173 case VOLUME_OVERFLOW:
174 case ILLEGAL_REQUEST:
177 if (failed_command == NULL ||
178 !blk_fs_request(failed_command))
180 sector = (sense->information[0] << 24) |
181 (sense->information[1] << 16) |
182 (sense->information[2] << 8) |
183 (sense->information[3]);
185 bio_sectors = bio_sectors(failed_command->bio);
188 if (drive->queue->hardsect_size == 2048)
189 sector <<= 2; /* Device sector size is 2K */
190 sector &= ~(bio_sectors -1);
191 valid = (sector - failed_command->sector) << 9;
195 if (sector < get_capacity(info->disk) &&
196 drive->probed_capacity - sector < 4 * 75) {
197 set_capacity(info->disk, sector);
201 #if VERBOSE_IDE_CD_ERRORS
204 const char *s = "bad sense key!";
207 printk ("ATAPI device %s:\n", drive->name);
208 if (sense->error_code==0x70)
210 else if (sense->error_code==0x71)
211 printk(" Deferred Error: ");
212 else if (sense->error_code == 0x7f)
213 printk(" Vendor-specific Error: ");
215 printk(" Unknown Error Type: ");
217 if (sense->sense_key < ARRAY_SIZE(sense_key_texts))
218 s = sense_key_texts[sense->sense_key];
220 printk("%s -- (Sense key=0x%02x)\n", s, sense->sense_key);
222 if (sense->asc == 0x40) {
223 sprintf(buf, "Diagnostic failure on component 0x%02x",
227 int lo = 0, mid, hi = ARRAY_SIZE(sense_data_texts);
228 unsigned long key = (sense->sense_key << 16);
229 key |= (sense->asc << 8);
230 if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd))
236 if (sense_data_texts[mid].asc_ascq == key ||
237 sense_data_texts[mid].asc_ascq == (0xff0000|key)) {
238 s = sense_data_texts[mid].text;
241 else if (sense_data_texts[mid].asc_ascq > key)
249 if (sense->asc > 0x80)
250 s = "(vendor-specific error)";
252 s = "(reserved error code)";
255 printk(KERN_ERR " %s -- (asc=0x%02x, ascq=0x%02x)\n",
256 s, sense->asc, sense->ascq);
258 if (failed_command != NULL) {
260 int lo=0, mid, hi= ARRAY_SIZE(packet_command_texts);
265 if (packet_command_texts[mid].packet_command ==
266 failed_command->cmd[0]) {
267 s = packet_command_texts[mid].text;
270 if (packet_command_texts[mid].packet_command >
271 failed_command->cmd[0])
277 printk (KERN_ERR " The failed \"%s\" packet command was: \n \"", s);
278 for (i=0; i<sizeof (failed_command->cmd); i++)
279 printk ("%02x ", failed_command->cmd[i]);
283 /* The SKSV bit specifies validity of the sense_key_specific
284 * in the next two commands. It is bit 7 of the first byte.
285 * In the case of NOT_READY, if SKSV is set the drive can
286 * give us nice ETA readings.
288 if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) {
289 int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100;
290 printk(KERN_ERR " Command is %02d%% complete\n", progress / 0xffff);
294 if (sense->sense_key == ILLEGAL_REQUEST &&
295 (sense->sks[0] & 0x80) != 0) {
296 printk(KERN_ERR " Error in %s byte %d",
297 (sense->sks[0] & 0x40) != 0 ?
298 "command packet" : "command data",
299 (sense->sks[1] << 8) + sense->sks[2]);
301 if ((sense->sks[0] & 0x40) != 0)
302 printk (" bit %d", sense->sks[0] & 0x07);
308 #else /* not VERBOSE_IDE_CD_ERRORS */
310 /* Suppress printing unit attention and `in progress of becoming ready'
311 errors when we're not being verbose. */
313 if (sense->sense_key == UNIT_ATTENTION ||
314 (sense->sense_key == NOT_READY && (sense->asc == 4 ||
315 sense->asc == 0x3a)))
318 printk(KERN_ERR "%s: error code: 0x%02x sense_key: 0x%02x asc: 0x%02x ascq: 0x%02x\n",
320 sense->error_code, sense->sense_key,
321 sense->asc, sense->ascq);
322 #endif /* not VERBOSE_IDE_CD_ERRORS */
326 * Initialize a ide-cd packet command request
328 static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq)
330 struct cdrom_info *cd = drive->driver_data;
332 ide_init_drive_cmd(rq);
333 rq->cmd_type = REQ_TYPE_ATA_PC;
334 rq->rq_disk = cd->disk;
337 static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
338 struct request *failed_command)
340 struct cdrom_info *info = drive->driver_data;
341 struct request *rq = &info->request_sense_request;
344 sense = &info->sense_data;
346 /* stuff the sense request in front of our current request */
347 cdrom_prepare_request(drive, rq);
350 rq->cmd[0] = GPCMD_REQUEST_SENSE;
351 rq->cmd[4] = rq->data_len = 18;
353 rq->cmd_type = REQ_TYPE_SENSE;
355 /* NOTE! Save the failed command in "rq->buffer" */
356 rq->buffer = (void *) failed_command;
358 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
361 static void cdrom_end_request (ide_drive_t *drive, int uptodate)
363 struct request *rq = HWGROUP(drive)->rq;
364 int nsectors = rq->hard_cur_sectors;
366 if (blk_sense_request(rq) && uptodate) {
368 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
371 struct request *failed = (struct request *) rq->buffer;
372 struct cdrom_info *info = drive->driver_data;
373 void *sense = &info->sense_data;
378 sense = failed->sense;
379 failed->sense_len = rq->sense_len;
381 cdrom_analyze_sense_data(drive, failed, sense);
383 * now end failed request
385 if (blk_fs_request(failed)) {
386 if (ide_end_dequeued_request(drive, failed, 0,
387 failed->hard_nr_sectors))
390 spin_lock_irqsave(&ide_lock, flags);
391 if (__blk_end_request(failed, -EIO,
394 spin_unlock_irqrestore(&ide_lock, flags);
397 cdrom_analyze_sense_data(drive, NULL, sense);
400 if (!rq->current_nr_sectors && blk_fs_request(rq))
402 /* make sure it's fully ended */
403 if (blk_pc_request(rq))
404 nsectors = (rq->data_len + 511) >> 9;
408 ide_end_request(drive, uptodate, nsectors);
411 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 stat)
415 ide_dump_status(drive, msg, stat);
418 /* Returns 0 if the request should be continued.
419 Returns 1 if the request was ended. */
420 static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
422 struct request *rq = HWGROUP(drive)->rq;
423 int stat, err, sense_key;
425 /* Check for errors. */
426 stat = HWIF(drive)->INB(IDE_STATUS_REG);
430 if (OK_STAT(stat, good_stat, BAD_R_STAT))
433 /* Get the IDE error register. */
434 err = HWIF(drive)->INB(IDE_ERROR_REG);
435 sense_key = err >> 4;
438 printk("%s: missing rq in cdrom_decode_status\n", drive->name);
442 if (blk_sense_request(rq)) {
443 /* We got an error trying to get sense info
444 from the drive (probably while trying
445 to recover from a former error). Just give up. */
447 rq->cmd_flags |= REQ_FAILED;
448 cdrom_end_request(drive, 0);
449 ide_error(drive, "request sense failure", stat);
452 } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
453 /* All other functions, except for READ. */
457 * if we have an error, pass back CHECK_CONDITION as the
460 if (blk_pc_request(rq) && !rq->errors)
461 rq->errors = SAM_STAT_CHECK_CONDITION;
463 /* Check for tray open. */
464 if (sense_key == NOT_READY) {
465 cdrom_saw_media_change (drive);
466 } else if (sense_key == UNIT_ATTENTION) {
467 /* Check for media change. */
468 cdrom_saw_media_change (drive);
469 /*printk("%s: media changed\n",drive->name);*/
471 } else if ((sense_key == ILLEGAL_REQUEST) &&
472 (rq->cmd[0] == GPCMD_START_STOP_UNIT)) {
474 * Don't print error message for this condition--
475 * SFF8090i indicates that 5/24/00 is the correct
476 * response to a request to close the tray if the
477 * drive doesn't have that capability.
478 * cdrom_log_sense() knows this!
480 } else if (!(rq->cmd_flags & REQ_QUIET)) {
481 /* Otherwise, print an error. */
482 ide_dump_status(drive, "packet command error", stat);
485 rq->cmd_flags |= REQ_FAILED;
488 * instead of playing games with moving completions around,
489 * remove failed request completely and end it when the
490 * request sense has completed
492 if (stat & ERR_STAT) {
493 spin_lock_irqsave(&ide_lock, flags);
494 blkdev_dequeue_request(rq);
495 HWGROUP(drive)->rq = NULL;
496 spin_unlock_irqrestore(&ide_lock, flags);
498 cdrom_queue_request_sense(drive, rq->sense, rq);
500 cdrom_end_request(drive, 0);
502 } else if (blk_fs_request(rq)) {
503 int do_end_request = 0;
505 /* Handle errors from READ and WRITE requests. */
507 if (blk_noretry_request(rq))
510 if (sense_key == NOT_READY) {
512 if (rq_data_dir(rq) == READ) {
513 cdrom_saw_media_change (drive);
515 /* Fail the request. */
516 printk ("%s: tray open\n", drive->name);
519 struct cdrom_info *info = drive->driver_data;
521 /* allow the drive 5 seconds to recover, some
522 * devices will return this error while flushing
525 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
527 if (time_after(jiffies, info->write_timeout))
533 * take a breather relying on the
534 * unplug timer to kick us again
536 spin_lock_irqsave(&ide_lock, flags);
537 blk_plug_device(drive->queue);
538 spin_unlock_irqrestore(&ide_lock,flags);
542 } else if (sense_key == UNIT_ATTENTION) {
544 cdrom_saw_media_change (drive);
546 /* Arrange to retry the request.
547 But be sure to give up if we've retried
549 if (++rq->errors > ERROR_MAX)
551 } else if (sense_key == ILLEGAL_REQUEST ||
552 sense_key == DATA_PROTECT) {
553 /* No point in retrying after an illegal
554 request or data protect error.*/
555 ide_dump_status_no_sense (drive, "command error", stat);
557 } else if (sense_key == MEDIUM_ERROR) {
558 /* No point in re-trying a zillion times on a bad
559 * sector... If we got here the error is not correctable */
560 ide_dump_status_no_sense (drive, "media error (bad sector)", stat);
562 } else if (sense_key == BLANK_CHECK) {
563 /* Disk appears blank ?? */
564 ide_dump_status_no_sense (drive, "media error (blank)", stat);
566 } else if ((err & ~ABRT_ERR) != 0) {
567 /* Go to the default handler
569 ide_error(drive, "cdrom_decode_status", stat);
571 } else if ((++rq->errors > ERROR_MAX)) {
572 /* We've racked up too many retries. Abort. */
576 /* End a request through request sense analysis when we have
577 sense data. We need this in order to perform end of media
580 if (do_end_request) {
581 if (stat & ERR_STAT) {
583 spin_lock_irqsave(&ide_lock, flags);
584 blkdev_dequeue_request(rq);
585 HWGROUP(drive)->rq = NULL;
586 spin_unlock_irqrestore(&ide_lock, flags);
588 cdrom_queue_request_sense(drive, rq->sense, rq);
590 cdrom_end_request(drive, 0);
592 /* If we got a CHECK_CONDITION status,
593 queue a request sense command. */
595 cdrom_queue_request_sense(drive, NULL, NULL);
598 blk_dump_rq_flags(rq, "ide-cd: bad rq");
599 cdrom_end_request(drive, 0);
602 /* Retry, or handle the next request. */
606 static int cdrom_timer_expiry(ide_drive_t *drive)
608 struct request *rq = HWGROUP(drive)->rq;
609 unsigned long wait = 0;
612 * Some commands are *slow* and normally take a long time to
613 * complete. Usually we can use the ATAPI "disconnect" to bypass
614 * this, but not all commands/drives support that. Let
615 * ide_timer_expiry keep polling us for these.
617 switch (rq->cmd[0]) {
619 case GPCMD_FORMAT_UNIT:
620 case GPCMD_RESERVE_RZONE_TRACK:
621 case GPCMD_CLOSE_TRACK:
622 case GPCMD_FLUSH_CACHE:
623 wait = ATAPI_WAIT_PC;
626 if (!(rq->cmd_flags & REQ_QUIET))
627 printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]);
634 /* Set up the device registers for transferring a packet command on DEV,
635 expecting to later transfer XFERLEN bytes. HANDLER is the routine
636 which actually transfers the command to the drive. If this is a
637 drq_interrupt device, this routine will arrange for HANDLER to be
638 called when the interrupt from the drive arrives. Otherwise, HANDLER
639 will be called immediately after the drive is prepared for the transfer. */
641 static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
643 ide_handler_t *handler)
645 ide_startstop_t startstop;
646 struct cdrom_info *info = drive->driver_data;
647 ide_hwif_t *hwif = drive->hwif;
649 /* Wait for the controller to be idle. */
650 if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
653 /* FIXME: for Virtual DMA we must check harder */
655 info->dma = !hwif->dma_setup(drive);
657 /* Set up the controller registers. */
658 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL |
659 IDE_TFLAG_NO_SELECT_MASK, xferlen, info->dma);
661 if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) {
662 /* waiting for CDB interrupt, not DMA yet. */
664 drive->waiting_for_dma = 0;
667 ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry);
673 spin_lock_irqsave(&ide_lock, flags);
674 hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG);
676 spin_unlock_irqrestore(&ide_lock, flags);
678 return (*handler) (drive);
682 /* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN.
683 The device registers must have already been prepared
684 by cdrom_start_packet_command.
685 HANDLER is the interrupt handler to call when the command completes
686 or there's data ready. */
687 #define ATAPI_MIN_CDB_BYTES 12
688 static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
690 ide_handler_t *handler)
692 ide_hwif_t *hwif = drive->hwif;
694 struct cdrom_info *info = drive->driver_data;
695 ide_startstop_t startstop;
697 if (CDROM_CONFIG_FLAGS(drive)->drq_interrupt) {
698 /* Here we should have been called after receiving an interrupt
699 from the device. DRQ should how be set. */
701 /* Check for errors. */
702 if (cdrom_decode_status(drive, DRQ_STAT, NULL))
705 /* Ok, next interrupt will be DMA interrupt. */
707 drive->waiting_for_dma = 1;
709 /* Otherwise, we must wait for DRQ to get set. */
710 if (ide_wait_stat(&startstop, drive, DRQ_STAT,
711 BUSY_STAT, WAIT_READY))
715 /* Arm the interrupt handler. */
716 ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
718 /* ATAPI commands get padded out to 12 bytes minimum */
719 cmd_len = COMMAND_SIZE(rq->cmd[0]);
720 if (cmd_len < ATAPI_MIN_CDB_BYTES)
721 cmd_len = ATAPI_MIN_CDB_BYTES;
723 /* Send the command to the device. */
724 HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
726 /* Start the DMA if need be */
728 hwif->dma_start(drive);
733 /****************************************************************************
734 * Block read functions.
737 typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
739 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
743 xf(drive, &dum, sizeof(dum));
749 * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector
750 * buffer. Once the first sector is added, any subsequent sectors are
751 * assumed to be continuous (until the buffer is cleared). For the first
752 * sector added, SECTOR is its sector number. (SECTOR is then ignored until
753 * the buffer is cleared.)
755 static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector,
756 int sectors_to_transfer)
758 struct cdrom_info *info = drive->driver_data;
760 /* Number of sectors to read into the buffer. */
761 int sectors_to_buffer = min_t(int, sectors_to_transfer,
762 (SECTOR_BUFFER_SIZE >> SECTOR_BITS) -
763 info->nsectors_buffered);
767 /* If we couldn't get a buffer, don't try to buffer anything... */
768 if (info->buffer == NULL)
769 sectors_to_buffer = 0;
771 /* If this is the first sector in the buffer, remember its number. */
772 if (info->nsectors_buffered == 0)
773 info->sector_buffered = sector;
775 /* Read the data into the buffer. */
776 dest = info->buffer + info->nsectors_buffered * SECTOR_SIZE;
777 while (sectors_to_buffer > 0) {
778 HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE);
780 --sectors_to_transfer;
781 ++info->nsectors_buffered;
785 /* Throw away any remaining data. */
786 while (sectors_to_transfer > 0) {
787 static char dum[SECTOR_SIZE];
788 HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
789 --sectors_to_transfer;
794 * Check the contents of the interrupt reason register from the cdrom
795 * and attempt to recover if there are problems. Returns 0 if everything's
796 * ok; nonzero if the request has been terminated.
799 int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
803 else if (ireason == 0) {
804 ide_hwif_t *hwif = drive->hwif;
806 /* Whoops... The drive is expecting to receive data from us! */
807 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
808 drive->name, __FUNCTION__);
810 /* Throw some data at the drive so it doesn't hang
811 and quit this request. */
812 ide_cd_pad_transfer(drive, hwif->atapi_output_bytes, len);
813 } else if (ireason == 1) {
814 /* Some drives (ASUS) seem to tell us that status
815 * info is available. just get it and ignore.
817 (void) HWIF(drive)->INB(IDE_STATUS_REG);
820 /* Drive wants a command packet, or invalid ireason... */
821 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
822 drive->name, __FUNCTION__, ireason);
825 cdrom_end_request(drive, 0);
830 * Interrupt routine. Called when a read request has completed.
832 static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
835 int ireason, len, sectors_to_transfer, nskip;
836 struct cdrom_info *info = drive->driver_data;
837 u8 lowcyl = 0, highcyl = 0;
838 int dma = info->dma, dma_error = 0;
840 struct request *rq = HWGROUP(drive)->rq;
847 dma_error = HWIF(drive)->ide_dma_end(drive);
849 printk(KERN_ERR "%s: DMA read error\n", drive->name);
854 if (cdrom_decode_status(drive, 0, &stat))
859 ide_end_request(drive, 1, rq->nr_sectors);
862 return ide_error(drive, "dma error", stat);
865 /* Read the interrupt reason and the transfer length. */
866 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
867 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
868 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
870 len = lowcyl + (256 * highcyl);
872 /* If DRQ is clear, the command has completed. */
873 if ((stat & DRQ_STAT) == 0) {
874 /* If we're not done filling the current buffer, complain.
875 Otherwise, complete the command normally. */
876 if (rq->current_nr_sectors > 0) {
877 printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n",
878 drive->name, rq->current_nr_sectors);
879 rq->cmd_flags |= REQ_FAILED;
880 cdrom_end_request(drive, 0);
882 cdrom_end_request(drive, 1);
886 /* Check that the drive is expecting to do the same thing we are. */
887 if (cdrom_read_check_ireason (drive, len, ireason))
890 /* Assume that the drive will always provide data in multiples
891 of at least SECTOR_SIZE, as it gets hairy to keep track
892 of the transfers otherwise. */
893 if ((len % SECTOR_SIZE) != 0) {
894 printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",
896 if (CDROM_CONFIG_FLAGS(drive)->limit_nframes)
897 printk (KERN_ERR " This drive is not supported by this version of the driver\n");
899 printk (KERN_ERR " Trying to limit transfer sizes\n");
900 CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
902 cdrom_end_request(drive, 0);
906 /* The number of sectors we need to read from the drive. */
907 sectors_to_transfer = len / SECTOR_SIZE;
909 /* First, figure out if we need to bit-bucket
910 any of the leading sectors. */
911 nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer);
914 /* We need to throw away a sector. */
915 static char dum[SECTOR_SIZE];
916 HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
918 --rq->current_nr_sectors;
920 --sectors_to_transfer;
923 /* Now loop while we still have data to read from the drive. */
924 while (sectors_to_transfer > 0) {
927 /* If we've filled the present buffer but there's another
928 chained buffer after it, move on. */
929 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
930 cdrom_end_request(drive, 1);
932 /* If the buffers are full, cache the rest of the data in our
934 if (rq->current_nr_sectors == 0) {
935 cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer);
936 sectors_to_transfer = 0;
938 /* Transfer data to the buffers.
939 Figure out how many sectors we can transfer
940 to the current buffer. */
941 this_transfer = min_t(int, sectors_to_transfer,
942 rq->current_nr_sectors);
944 /* Read this_transfer sectors
945 into the current buffer. */
946 while (this_transfer > 0) {
947 HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE);
948 rq->buffer += SECTOR_SIZE;
950 --rq->current_nr_sectors;
953 --sectors_to_transfer;
958 /* Done moving data! Wait for another interrupt. */
959 ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL);
964 * Try to satisfy some of the current read request from our cached data.
965 * Returns nonzero if the request has been completed, zero otherwise.
967 static int cdrom_read_from_buffer (ide_drive_t *drive)
969 struct cdrom_info *info = drive->driver_data;
970 struct request *rq = HWGROUP(drive)->rq;
971 unsigned short sectors_per_frame;
973 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
975 /* Can't do anything if there's no buffer. */
976 if (info->buffer == NULL) return 0;
978 /* Loop while this request needs data and the next block is present
980 while (rq->nr_sectors > 0 &&
981 rq->sector >= info->sector_buffered &&
982 rq->sector < info->sector_buffered + info->nsectors_buffered) {
983 if (rq->current_nr_sectors == 0)
984 cdrom_end_request(drive, 1);
988 (rq->sector - info->sector_buffered) * SECTOR_SIZE,
990 rq->buffer += SECTOR_SIZE;
991 --rq->current_nr_sectors;
996 /* If we've satisfied the current request,
997 terminate it successfully. */
998 if (rq->nr_sectors == 0) {
999 cdrom_end_request(drive, 1);
1003 /* Move on to the next buffer if needed. */
1004 if (rq->current_nr_sectors == 0)
1005 cdrom_end_request(drive, 1);
1007 /* If this condition does not hold, then the kluge i use to
1008 represent the number of sectors to skip at the start of a transfer
1009 will fail. I think that this will never happen, but let's be
1010 paranoid and check. */
1011 if (rq->current_nr_sectors < bio_cur_sectors(rq->bio) &&
1012 (rq->sector & (sectors_per_frame - 1))) {
1013 printk(KERN_ERR "%s: cdrom_read_from_buffer: buffer botch (%ld)\n",
1014 drive->name, (long)rq->sector);
1015 cdrom_end_request(drive, 0);
1023 * Routine to send a read packet command to the drive.
1024 * This is usually called directly from cdrom_start_read.
1025 * However, for drq_interrupt devices, it is called from an interrupt
1026 * when the drive is ready to accept the command.
1028 static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
1030 struct request *rq = HWGROUP(drive)->rq;
1031 unsigned short sectors_per_frame;
1034 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1036 /* If the requested sector doesn't start on a cdrom block boundary,
1037 we must adjust the start of the transfer so that it does,
1038 and remember to skip the first few sectors.
1039 If the CURRENT_NR_SECTORS field is larger than the size
1040 of the buffer, it will mean that we're to skip a number
1041 of sectors equal to the amount by which CURRENT_NR_SECTORS
1042 is larger than the buffer size. */
1043 nskip = rq->sector & (sectors_per_frame - 1);
1045 /* Sanity check... */
1046 if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) &&
1047 (rq->sector & (sectors_per_frame - 1))) {
1048 printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n",
1049 drive->name, rq->current_nr_sectors);
1050 cdrom_end_request(drive, 0);
1053 rq->current_nr_sectors += nskip;
1056 /* Set up the command */
1057 rq->timeout = ATAPI_WAIT_PC;
1059 /* Send the command to the drive and return. */
1060 return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr);
1064 #define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
1065 #define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
1066 #define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
1068 static ide_startstop_t cdrom_seek_intr (ide_drive_t *drive)
1070 struct cdrom_info *info = drive->driver_data;
1072 static int retry = 10;
1074 if (cdrom_decode_status(drive, 0, &stat))
1076 CDROM_CONFIG_FLAGS(drive)->seeking = 1;
1078 if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
1081 * this condition is far too common, to bother
1084 /* printk("%s: disabled DSC seek overlap\n", drive->name);*/
1085 drive->dsc_overlap = 0;
1091 static ide_startstop_t cdrom_start_seek_continuation (ide_drive_t *drive)
1093 struct request *rq = HWGROUP(drive)->rq;
1094 sector_t frame = rq->sector;
1096 sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
1098 memset(rq->cmd, 0, sizeof(rq->cmd));
1099 rq->cmd[0] = GPCMD_SEEK;
1100 put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
1102 rq->timeout = ATAPI_WAIT_PC;
1103 return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
1106 static ide_startstop_t cdrom_start_seek (ide_drive_t *drive, unsigned int block)
1108 struct cdrom_info *info = drive->driver_data;
1111 info->start_seek = jiffies;
1112 return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation);
1115 /* Fix up a possibly partially-processed request so that we can
1116 start it over entirely, or even put it back on the request queue. */
1117 static void restore_request (struct request *rq)
1119 if (rq->buffer != bio_data(rq->bio)) {
1120 sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE;
1122 rq->buffer = bio_data(rq->bio);
1123 rq->nr_sectors += n;
1126 rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio);
1127 rq->hard_nr_sectors = rq->nr_sectors;
1128 rq->hard_sector = rq->sector;
1129 rq->q->prep_rq_fn(rq->q, rq);
1133 * Start a read request from the CD-ROM.
1135 static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
1137 struct cdrom_info *info = drive->driver_data;
1138 struct request *rq = HWGROUP(drive)->rq;
1139 unsigned short sectors_per_frame;
1141 sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1143 /* We may be retrying this request after an error. Fix up
1144 any weirdness which might be present in the request packet. */
1145 restore_request(rq);
1147 /* Satisfy whatever we can of this request from our cached sector. */
1148 if (cdrom_read_from_buffer(drive))
1151 /* Clear the local sector buffer. */
1152 info->nsectors_buffered = 0;
1154 /* use dma, if possible. */
1155 info->dma = drive->using_dma;
1156 if ((rq->sector & (sectors_per_frame - 1)) ||
1157 (rq->nr_sectors & (sectors_per_frame - 1)))
1160 /* Start sending the read request to the drive. */
1161 return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation);
1164 /****************************************************************************
1165 * Execute all other packet commands.
1168 /* Interrupt routine for packet command completion. */
1169 static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
1171 struct request *rq = HWGROUP(drive)->rq;
1172 xfer_func_t *xferfunc = NULL;
1173 int stat, ireason, len, thislen, write;
1174 u8 lowcyl = 0, highcyl = 0;
1176 /* Check for errors. */
1177 if (cdrom_decode_status(drive, 0, &stat))
1180 /* Read the interrupt reason and the transfer length. */
1181 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1182 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1183 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1185 len = lowcyl + (256 * highcyl);
1187 /* If DRQ is clear, the command has completed.
1188 Complain if we still have data left to transfer. */
1189 if ((stat & DRQ_STAT) == 0) {
1190 /* Some of the trailing request sense fields are optional, and
1191 some drives don't send them. Sigh. */
1192 if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
1194 rq->data_len <= 5) {
1195 while (rq->data_len > 0) {
1196 *(unsigned char *)rq->data++ = 0;
1201 if (rq->data_len == 0)
1202 cdrom_end_request(drive, 1);
1204 rq->cmd_flags |= REQ_FAILED;
1205 cdrom_end_request(drive, 0);
1210 /* Figure out how much data to transfer. */
1211 thislen = rq->data_len;
1217 xferfunc = HWIF(drive)->atapi_output_bytes;
1218 } else if (ireason == 2) {
1220 xferfunc = HWIF(drive)->atapi_input_bytes;
1225 printk(KERN_ERR "%s: confused, missing data\n",
1227 blk_dump_rq_flags(rq, write ? "cdrom_pc_intr, write"
1228 : "cdrom_pc_intr, read");
1231 /* Transfer the data. */
1232 xferfunc(drive, rq->data, thislen);
1234 /* Keep count of how much data we've moved. */
1236 rq->data += thislen;
1237 rq->data_len -= thislen;
1239 if (write && blk_sense_request(rq))
1240 rq->sense_len += thislen;
1242 printk (KERN_ERR "%s: cdrom_pc_intr: The drive "
1243 "appears confused (ireason = 0x%02x). "
1244 "Trying to recover by ending request.\n",
1245 drive->name, ireason);
1246 rq->cmd_flags |= REQ_FAILED;
1247 cdrom_end_request(drive, 0);
1252 * If we haven't moved enough data to satisfy the drive,
1256 ide_cd_pad_transfer(drive, xferfunc, len);
1258 /* Now we wait for another interrupt. */
1259 ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry);
1263 static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive)
1265 struct request *rq = HWGROUP(drive)->rq;
1268 rq->timeout = ATAPI_WAIT_PC;
1270 /* Send the command to the drive and return. */
1271 return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr);
1275 static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive)
1278 struct request *rq = HWGROUP(drive)->rq;
1279 struct cdrom_info *info = drive->driver_data;
1282 rq->cmd_flags &= ~REQ_FAILED;
1285 /* Start sending the command to the drive. */
1286 return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation);
1290 static int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
1292 struct request_sense sense;
1294 unsigned int flags = rq->cmd_flags;
1296 if (rq->sense == NULL)
1299 /* Start of retry loop. */
1302 unsigned long time = jiffies;
1303 rq->cmd_flags = flags;
1305 error = ide_do_drive_cmd(drive, rq, ide_wait);
1306 time = jiffies - time;
1308 /* FIXME: we should probably abort/retry or something
1309 * in case of failure */
1310 if (rq->cmd_flags & REQ_FAILED) {
1311 /* The request failed. Retry if it was due to a unit
1313 (usually means media was changed). */
1314 struct request_sense *reqbuf = rq->sense;
1316 if (reqbuf->sense_key == UNIT_ATTENTION)
1317 cdrom_saw_media_change(drive);
1318 else if (reqbuf->sense_key == NOT_READY &&
1319 reqbuf->asc == 4 && reqbuf->ascq != 4) {
1320 /* The drive is in the process of loading
1321 a disk. Retry, but wait a little to give
1322 the drive time to complete the load. */
1325 /* Otherwise, don't retry. */
1331 /* End of retry loop. */
1332 } while ((rq->cmd_flags & REQ_FAILED) && retries >= 0);
1334 /* Return an error if the command failed. */
1335 return (rq->cmd_flags & REQ_FAILED) ? -EIO : 0;
1341 static int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
1343 /* Two notes about IDE interrupt reason here - 0 means that
1344 * the drive wants to receive data from us, 2 means that
1345 * the drive is expecting to transfer data to us.
1349 else if (ireason == 2) {
1350 ide_hwif_t *hwif = drive->hwif;
1352 /* Whoops... The drive wants to send data. */
1353 printk(KERN_ERR "%s: %s: wrong transfer direction!\n",
1354 drive->name, __FUNCTION__);
1356 ide_cd_pad_transfer(drive, hwif->atapi_input_bytes, len);
1358 /* Drive wants a command packet, or invalid ireason... */
1359 printk(KERN_ERR "%s: %s: bad interrupt reason 0x%02x\n",
1360 drive->name, __FUNCTION__, ireason);
1363 cdrom_end_request(drive, 0);
1368 * Called from blk_end_request_callback() after the data of the request
1369 * is completed and before the request is completed.
1370 * By returning value '1', blk_end_request_callback() returns immediately
1371 * without completing the request.
1373 static int cdrom_newpc_intr_dummy_cb(struct request *rq)
1379 * best way to deal with dma that is not sector aligned right now... note
1380 * that in this path we are not using ->data or ->buffer at all. this irs
1381 * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the
1384 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
1386 struct cdrom_info *info = drive->driver_data;
1387 struct request *rq = HWGROUP(drive)->rq;
1388 int dma_error, dma, stat, ireason, len, thislen;
1390 xfer_func_t *xferfunc;
1391 unsigned long flags;
1393 /* Check for errors. */
1398 dma_error = HWIF(drive)->ide_dma_end(drive);
1400 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
1401 rq_data_dir(rq) ? "write" : "read");
1406 if (cdrom_decode_status(drive, 0, &stat))
1410 * using dma, transfer is complete now
1414 return ide_error(drive, "dma error", stat);
1416 spin_lock_irqsave(&ide_lock, flags);
1417 if (__blk_end_request(rq, 0, rq->data_len))
1419 HWGROUP(drive)->rq = NULL;
1420 spin_unlock_irqrestore(&ide_lock, flags);
1426 * ok we fall to pio :/
1428 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1429 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1430 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1432 len = lowcyl + (256 * highcyl);
1433 thislen = rq->data_len;
1438 * If DRQ is clear, the command has completed.
1440 if ((stat & DRQ_STAT) == 0) {
1441 spin_lock_irqsave(&ide_lock, flags);
1442 if (__blk_end_request(rq, 0, rq->data_len))
1444 HWGROUP(drive)->rq = NULL;
1445 spin_unlock_irqrestore(&ide_lock, flags);
1451 * check which way to transfer data
1453 if (rq_data_dir(rq) == WRITE) {
1457 if (cdrom_write_check_ireason(drive, len, ireason))
1460 xferfunc = HWIF(drive)->atapi_output_bytes;
1465 if (cdrom_read_check_ireason(drive, len, ireason))
1468 xferfunc = HWIF(drive)->atapi_input_bytes;
1474 while (thislen > 0) {
1475 int blen = blen = rq->data_len;
1476 char *ptr = rq->data;
1482 ptr = bio_data(rq->bio);
1483 blen = bio_iovec(rq->bio)->bv_len;
1487 printk(KERN_ERR "%s: confused, missing data\n", drive->name);
1494 xferfunc(drive, ptr, blen);
1498 rq->data_len -= blen;
1502 * The request can't be completed until DRQ is cleared.
1503 * So complete the data, but don't complete the request
1504 * using the dummy function for the callback feature
1505 * of blk_end_request_callback().
1507 blk_end_request_callback(rq, 0, blen,
1508 cdrom_newpc_intr_dummy_cb);
1517 ide_cd_pad_transfer(drive, xferfunc, len);
1519 BUG_ON(HWGROUP(drive)->handler != NULL);
1521 ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
1525 static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
1527 int stat, ireason, len, sectors_to_transfer, uptodate;
1528 struct cdrom_info *info = drive->driver_data;
1529 int dma_error = 0, dma = info->dma;
1530 u8 lowcyl = 0, highcyl = 0;
1532 struct request *rq = HWGROUP(drive)->rq;
1534 /* Check for errors. */
1537 dma_error = HWIF(drive)->ide_dma_end(drive);
1539 printk(KERN_ERR "%s: DMA write error\n", drive->name);
1544 if (cdrom_decode_status(drive, 0, &stat))
1548 * using dma, transfer is complete now
1552 return ide_error(drive, "dma error", stat);
1554 ide_end_request(drive, 1, rq->nr_sectors);
1558 /* Read the interrupt reason and the transfer length. */
1559 ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
1560 lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
1561 highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
1563 len = lowcyl + (256 * highcyl);
1565 /* If DRQ is clear, the command has completed. */
1566 if ((stat & DRQ_STAT) == 0) {
1567 /* If we're not done writing, complain.
1568 * Otherwise, complete the command normally.
1571 if (rq->current_nr_sectors > 0) {
1572 printk(KERN_ERR "%s: %s: data underrun (%d blocks)\n",
1573 drive->name, __FUNCTION__,
1574 rq->current_nr_sectors);
1577 cdrom_end_request(drive, uptodate);
1581 /* Check that the drive is expecting to do the same thing we are. */
1582 if (cdrom_write_check_ireason(drive, len, ireason))
1585 sectors_to_transfer = len / SECTOR_SIZE;
1588 * now loop and write out the data
1590 while (sectors_to_transfer > 0) {
1593 if (!rq->current_nr_sectors) {
1594 printk(KERN_ERR "%s: %s: confused, missing data\n",
1595 drive->name, __FUNCTION__);
1600 * Figure out how many sectors we can transfer
1602 this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors);
1604 while (this_transfer > 0) {
1605 HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
1606 rq->buffer += SECTOR_SIZE;
1608 --rq->current_nr_sectors;
1611 --sectors_to_transfer;
1615 * current buffer complete, move on
1617 if (rq->current_nr_sectors == 0 && rq->nr_sectors)
1618 cdrom_end_request(drive, 1);
1621 /* re-arm handler */
1622 ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL);
1626 static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
1628 struct request *rq = HWGROUP(drive)->rq;
1630 #if 0 /* the immediate bit */
1631 rq->cmd[1] = 1 << 3;
1633 rq->timeout = ATAPI_WAIT_PC;
1635 return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
1638 static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
1640 struct cdrom_info *info = drive->driver_data;
1641 struct gendisk *g = info->disk;
1642 unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
1645 * writes *must* be hardware frame aligned
1647 if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
1648 (rq->sector & (sectors_per_frame - 1))) {
1649 cdrom_end_request(drive, 0);
1654 * disk has become write protected
1657 cdrom_end_request(drive, 0);
1661 info->nsectors_buffered = 0;
1663 /* use dma, if possible. we don't need to check more, since we
1664 * know that the transfer is always (at least!) frame aligned */
1665 info->dma = drive->using_dma ? 1 : 0;
1667 info->devinfo.media_written = 1;
1669 /* Start sending the write request to the drive. */
1670 return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
1673 static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
1675 struct request *rq = HWGROUP(drive)->rq;
1678 rq->timeout = ATAPI_WAIT_PC;
1680 return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
1683 static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
1685 struct cdrom_info *info = drive->driver_data;
1687 rq->cmd_flags |= REQ_QUIET;
1695 int mask = drive->queue->dma_alignment;
1696 unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
1698 info->dma = drive->using_dma;
1701 * check if dma is safe
1703 * NOTE! The "len" and "addr" checks should possibly have
1706 if ((rq->data_len & 15) || (addr & mask))
1710 /* Start sending the command to the drive. */
1711 return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
1714 /****************************************************************************
1715 * cdrom driver request routine.
1717 static ide_startstop_t
1718 ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
1720 ide_startstop_t action;
1721 struct cdrom_info *info = drive->driver_data;
1723 if (blk_fs_request(rq)) {
1724 if (CDROM_CONFIG_FLAGS(drive)->seeking) {
1725 unsigned long elapsed = jiffies - info->start_seek;
1726 int stat = HWIF(drive)->INB(IDE_STATUS_REG);
1728 if ((stat & SEEK_STAT) != SEEK_STAT) {
1729 if (elapsed < IDECD_SEEK_TIMEOUT) {
1730 ide_stall_queue(drive, IDECD_SEEK_TIMER);
1733 printk (KERN_ERR "%s: DSC timeout\n", drive->name);
1735 CDROM_CONFIG_FLAGS(drive)->seeking = 0;
1737 if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) {
1738 action = cdrom_start_seek(drive, block);
1740 if (rq_data_dir(rq) == READ)
1741 action = cdrom_start_read(drive, block);
1743 action = cdrom_start_write(drive, rq);
1745 info->last_block = block;
1747 } else if (rq->cmd_type == REQ_TYPE_SENSE ||
1748 rq->cmd_type == REQ_TYPE_ATA_PC) {
1749 return cdrom_do_packet_command(drive);
1750 } else if (blk_pc_request(rq)) {
1751 return cdrom_do_block_pc(drive, rq);
1752 } else if (blk_special_request(rq)) {
1754 * right now this can only be a reset...
1756 cdrom_end_request(drive, 1);
1760 blk_dump_rq_flags(rq, "ide-cd bad flags");
1761 cdrom_end_request(drive, 0);
1767 /****************************************************************************
1770 * Routines which queue packet commands take as a final argument a pointer
1771 * to a request_sense struct. If execution of the command results
1772 * in an error with a CHECK CONDITION status, this structure will be filled
1773 * with the results of the subsequent request sense command. The pointer
1774 * can also be NULL, in which case no sense information is returned.
1777 #if ! STANDARD_ATAPI
1781 return (x%10) | ((x/10) << 4);
1788 return (x >> 4) * 10 + (x & 0x0f);
1792 void msf_from_bcd (struct atapi_msf *msf)
1794 msf->minute = bcd2bin (msf->minute);
1795 msf->second = bcd2bin (msf->second);
1796 msf->frame = bcd2bin (msf->frame);
1799 #endif /* not STANDARD_ATAPI */
1803 void lba_to_msf (int lba, byte *m, byte *s, byte *f)
1805 lba += CD_MSF_OFFSET;
1806 lba &= 0xffffff; /* negative lbas use only 24 bits */
1807 *m = lba / (CD_SECS * CD_FRAMES);
1808 lba %= (CD_SECS * CD_FRAMES);
1809 *s = lba / CD_FRAMES;
1810 *f = lba % CD_FRAMES;
1815 int msf_to_lba (byte m, byte s, byte f)
1817 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
1820 static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
1823 struct cdrom_info *info = drive->driver_data;
1824 struct cdrom_device_info *cdi = &info->devinfo;
1826 cdrom_prepare_request(drive, &req);
1829 req.cmd[0] = GPCMD_TEST_UNIT_READY;
1830 req.cmd_flags |= REQ_QUIET;
1832 #if ! STANDARD_ATAPI
1833 /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to
1834 switch CDs instead of supporting the LOAD_UNLOAD opcode */
1836 req.cmd[7] = cdi->sanyo_slot % 3;
1837 #endif /* not STANDARD_ATAPI */
1839 return cdrom_queue_packet_command(drive, &req);
1843 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
1845 cdrom_lockdoor(ide_drive_t *drive, int lockflag, struct request_sense *sense)
1847 struct request_sense my_sense;
1854 /* If the drive cannot lock the door, just pretend. */
1855 if (CDROM_CONFIG_FLAGS(drive)->no_doorlock) {
1858 cdrom_prepare_request(drive, &req);
1860 req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
1861 req.cmd[4] = lockflag ? 1 : 0;
1862 stat = cdrom_queue_packet_command(drive, &req);
1865 /* If we got an illegal field error, the drive
1866 probably cannot lock the door. */
1868 sense->sense_key == ILLEGAL_REQUEST &&
1869 (sense->asc == 0x24 || sense->asc == 0x20)) {
1870 printk (KERN_ERR "%s: door locking not supported\n",
1872 CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
1876 /* no medium, that's alright. */
1877 if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
1881 CDROM_STATE_FLAGS(drive)->door_locked = lockflag;
1887 /* Eject the disk if EJECTFLAG is 0.
1888 If EJECTFLAG is 1, try to reload the disk. */
1889 static int cdrom_eject(ide_drive_t *drive, int ejectflag,
1890 struct request_sense *sense)
1895 if (CDROM_CONFIG_FLAGS(drive)->no_eject && !ejectflag)
1896 return -EDRIVE_CANT_DO_THIS;
1898 /* reload fails on some drives, if the tray is locked */
1899 if (CDROM_STATE_FLAGS(drive)->door_locked && ejectflag)
1902 cdrom_prepare_request(drive, &req);
1904 /* only tell drive to close tray if open, if it can do that */
1905 if (ejectflag && !CDROM_CONFIG_FLAGS(drive)->close_tray)
1909 req.cmd[0] = GPCMD_START_STOP_UNIT;
1910 req.cmd[4] = loej | (ejectflag != 0);
1911 return cdrom_queue_packet_command(drive, &req);
1914 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
1915 unsigned long *sectors_per_frame,
1916 struct request_sense *sense)
1926 cdrom_prepare_request(drive, &req);
1929 req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
1930 req.data = (char *)&capbuf;
1931 req.data_len = sizeof(capbuf);
1932 req.cmd_flags |= REQ_QUIET;
1934 stat = cdrom_queue_packet_command(drive, &req);
1936 *capacity = 1 + be32_to_cpu(capbuf.lba);
1937 *sectors_per_frame =
1938 be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
1944 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
1945 int format, char *buf, int buflen,
1946 struct request_sense *sense)
1950 cdrom_prepare_request(drive, &req);
1954 req.data_len = buflen;
1955 req.cmd_flags |= REQ_QUIET;
1956 req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
1957 req.cmd[6] = trackno;
1958 req.cmd[7] = (buflen >> 8);
1959 req.cmd[8] = (buflen & 0xff);
1960 req.cmd[9] = (format << 6);
1965 return cdrom_queue_packet_command(drive, &req);
1969 /* Try to read the entire TOC for the disk into our internal buffer. */
1970 static int cdrom_read_toc(ide_drive_t *drive, struct request_sense *sense)
1972 int stat, ntracks, i;
1973 struct cdrom_info *info = drive->driver_data;
1974 struct cdrom_device_info *cdi = &info->devinfo;
1975 struct atapi_toc *toc = info->toc;
1977 struct atapi_toc_header hdr;
1978 struct atapi_toc_entry ent;
1981 unsigned long sectors_per_frame = SECTORS_PER_FRAME;
1984 /* Try to allocate space. */
1985 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
1987 printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
1993 /* Check to see if the existing data is still valid.
1994 If it is, just return. */
1995 (void) cdrom_check_status(drive, sense);
1997 if (CDROM_STATE_FLAGS(drive)->toc_valid)
2000 /* Try to get the total cdrom capacity and sector size. */
2001 stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
2004 toc->capacity = 0x1fffff;
2006 set_capacity(info->disk, toc->capacity * sectors_per_frame);
2007 /* Save a private copy of te TOC capacity for error handling */
2008 drive->probed_capacity = toc->capacity * sectors_per_frame;
2010 blk_queue_hardsect_size(drive->queue,
2011 sectors_per_frame << SECTOR_BITS);
2013 /* First read just the header, so we know how long the TOC is. */
2014 stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
2015 sizeof(struct atapi_toc_header), sense);
2019 #if ! STANDARD_ATAPI
2020 if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
2021 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
2022 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
2024 #endif /* not STANDARD_ATAPI */
2026 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
2029 if (ntracks > MAX_TRACKS)
2030 ntracks = MAX_TRACKS;
2032 /* Now read the whole schmeer. */
2033 stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
2035 sizeof(struct atapi_toc_header) +
2037 sizeof(struct atapi_toc_entry), sense);
2039 if (stat && toc->hdr.first_track > 1) {
2040 /* Cds with CDI tracks only don't have any TOC entries,
2041 despite of this the returned values are
2042 first_track == last_track = number of CDI tracks + 1,
2043 so that this case is indistinguishable from the same
2044 layout plus an additional audio track.
2045 If we get an error for the regular case, we assume
2046 a CDI without additional audio tracks. In this case
2047 the readable TOC is empty (CDI tracks are not included)
2048 and only holds the Leadout entry. Heiko Eißfeldt */
2050 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
2052 sizeof(struct atapi_toc_header) +
2054 sizeof(struct atapi_toc_entry),
2059 #if ! STANDARD_ATAPI
2060 if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
2061 toc->hdr.first_track = bin2bcd(CDROM_LEADOUT);
2062 toc->hdr.last_track = bin2bcd(CDROM_LEADOUT);
2064 #endif /* not STANDARD_ATAPI */
2066 toc->hdr.first_track = CDROM_LEADOUT;
2067 toc->hdr.last_track = CDROM_LEADOUT;
2074 toc->hdr.toc_length = ntohs (toc->hdr.toc_length);
2076 #if ! STANDARD_ATAPI
2077 if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
2078 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
2079 toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
2081 #endif /* not STANDARD_ATAPI */
2083 for (i=0; i<=ntracks; i++) {
2084 #if ! STANDARD_ATAPI
2085 if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) {
2086 if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd)
2087 toc->ent[i].track = bcd2bin(toc->ent[i].track);
2088 msf_from_bcd(&toc->ent[i].addr.msf);
2090 #endif /* not STANDARD_ATAPI */
2091 toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute,
2092 toc->ent[i].addr.msf.second,
2093 toc->ent[i].addr.msf.frame);
2096 /* Read the multisession information. */
2097 if (toc->hdr.first_track != CDROM_LEADOUT) {
2098 /* Read the multisession information. */
2099 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
2100 sizeof(ms_tmp), sense);
2104 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
2106 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
2107 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
2110 #if ! STANDARD_ATAPI
2111 if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) {
2112 /* Re-read multisession information using MSF format */
2113 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
2114 sizeof(ms_tmp), sense);
2118 msf_from_bcd (&ms_tmp.ent.addr.msf);
2119 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
2120 ms_tmp.ent.addr.msf.second,
2121 ms_tmp.ent.addr.msf.frame);
2123 #endif /* not STANDARD_ATAPI */
2125 toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
2127 /* Now try to get the total cdrom capacity. */
2128 stat = cdrom_get_last_written(cdi, &last_written);
2129 if (!stat && (last_written > toc->capacity)) {
2130 toc->capacity = last_written;
2131 set_capacity(info->disk, toc->capacity * sectors_per_frame);
2132 drive->probed_capacity = toc->capacity * sectors_per_frame;
2135 /* Remember that we've read this stuff. */
2136 CDROM_STATE_FLAGS(drive)->toc_valid = 1;
2142 static int cdrom_read_subchannel(ide_drive_t *drive, int format, char *buf,
2143 int buflen, struct request_sense *sense)
2147 cdrom_prepare_request(drive, &req);
2151 req.data_len = buflen;
2152 req.cmd[0] = GPCMD_READ_SUBCHANNEL;
2153 req.cmd[1] = 2; /* MSF addressing */
2154 req.cmd[2] = 0x40; /* request subQ data */
2155 req.cmd[3] = format;
2156 req.cmd[7] = (buflen >> 8);
2157 req.cmd[8] = (buflen & 0xff);
2158 return cdrom_queue_packet_command(drive, &req);
2161 /* ATAPI cdrom drives are free to select the speed you request or any slower
2162 rate :-( Requesting too fast a speed will _not_ produce an error. */
2163 static int cdrom_select_speed(ide_drive_t *drive, int speed,
2164 struct request_sense *sense)
2167 cdrom_prepare_request(drive, &req);
2171 speed = 0xffff; /* set to max */
2173 speed *= 177; /* Nx to kbytes/s */
2175 req.cmd[0] = GPCMD_SET_SPEED;
2176 /* Read Drive speed in kbytes/second MSB */
2177 req.cmd[2] = (speed >> 8) & 0xff;
2178 /* Read Drive speed in kbytes/second LSB */
2179 req.cmd[3] = speed & 0xff;
2180 if (CDROM_CONFIG_FLAGS(drive)->cd_r ||
2181 CDROM_CONFIG_FLAGS(drive)->cd_rw ||
2182 CDROM_CONFIG_FLAGS(drive)->dvd_r) {
2183 /* Write Drive speed in kbytes/second MSB */
2184 req.cmd[4] = (speed >> 8) & 0xff;
2185 /* Write Drive speed in kbytes/second LSB */
2186 req.cmd[5] = speed & 0xff;
2189 return cdrom_queue_packet_command(drive, &req);
2192 static int cdrom_play_audio(ide_drive_t *drive, int lba_start, int lba_end)
2194 struct request_sense sense;
2197 cdrom_prepare_request(drive, &req);
2200 req.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2201 lba_to_msf(lba_start, &req.cmd[3], &req.cmd[4], &req.cmd[5]);
2202 lba_to_msf(lba_end-1, &req.cmd[6], &req.cmd[7], &req.cmd[8]);
2204 return cdrom_queue_packet_command(drive, &req);
2207 static int cdrom_get_toc_entry(ide_drive_t *drive, int track,
2208 struct atapi_toc_entry **ent)
2210 struct cdrom_info *info = drive->driver_data;
2211 struct atapi_toc *toc = info->toc;
2215 * don't serve cached data, if the toc isn't valid
2217 if (!CDROM_STATE_FLAGS(drive)->toc_valid)
2220 /* Check validity of requested track number. */
2221 ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
2222 if (toc->hdr.first_track == CDROM_LEADOUT) ntracks = 0;
2223 if (track == CDROM_LEADOUT)
2224 *ent = &toc->ent[ntracks];
2225 else if (track < toc->hdr.first_track ||
2226 track > toc->hdr.last_track)
2229 *ent = &toc->ent[track - toc->hdr.first_track];
2234 /* the generic packet interface to cdrom.c */
2235 static int ide_cdrom_packet(struct cdrom_device_info *cdi,
2236 struct packet_command *cgc)
2239 ide_drive_t *drive = cdi->handle;
2241 if (cgc->timeout <= 0)
2242 cgc->timeout = ATAPI_WAIT_PC;
2244 /* here we queue the commands from the uniform CD-ROM
2245 layer. the packet must be complete, as we do not
2247 cdrom_prepare_request(drive, &req);
2248 memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
2250 memset(cgc->sense, 0, sizeof(struct request_sense));
2251 req.data = cgc->buffer;
2252 req.data_len = cgc->buflen;
2253 req.timeout = cgc->timeout;
2256 req.cmd_flags |= REQ_QUIET;
2258 req.sense = cgc->sense;
2259 cgc->stat = cdrom_queue_packet_command(drive, &req);
2261 cgc->buflen -= req.data_len;
2266 int ide_cdrom_audio_ioctl (struct cdrom_device_info *cdi,
2267 unsigned int cmd, void *arg)
2270 ide_drive_t *drive = cdi->handle;
2271 struct cdrom_info *info = drive->driver_data;
2276 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
2277 * atapi doesn't support it
2279 case CDROMPLAYTRKIND: {
2280 unsigned long lba_start, lba_end;
2281 struct cdrom_ti *ti = arg;
2282 struct atapi_toc_entry *first_toc, *last_toc;
2284 stat = cdrom_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
2288 stat = cdrom_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
2292 if (ti->cdti_trk1 != CDROM_LEADOUT)
2294 lba_start = first_toc->addr.lba;
2295 lba_end = last_toc->addr.lba;
2297 if (lba_end <= lba_start)
2300 return cdrom_play_audio(drive, lba_start, lba_end);
2303 case CDROMREADTOCHDR: {
2304 struct cdrom_tochdr *tochdr = arg;
2305 struct atapi_toc *toc;
2307 /* Make sure our saved TOC is valid. */
2308 stat = cdrom_read_toc(drive, NULL);
2313 tochdr->cdth_trk0 = toc->hdr.first_track;
2314 tochdr->cdth_trk1 = toc->hdr.last_track;
2319 case CDROMREADTOCENTRY: {
2320 struct cdrom_tocentry *tocentry = arg;
2321 struct atapi_toc_entry *toce;
2323 stat = cdrom_get_toc_entry(drive, tocentry->cdte_track, &toce);
2327 tocentry->cdte_ctrl = toce->control;
2328 tocentry->cdte_adr = toce->adr;
2329 if (tocentry->cdte_format == CDROM_MSF) {
2330 lba_to_msf (toce->addr.lba,
2331 &tocentry->cdte_addr.msf.minute,
2332 &tocentry->cdte_addr.msf.second,
2333 &tocentry->cdte_addr.msf.frame);
2335 tocentry->cdte_addr.lba = toce->addr.lba;
2346 int ide_cdrom_reset (struct cdrom_device_info *cdi)
2348 ide_drive_t *drive = cdi->handle;
2349 struct request_sense sense;
2353 cdrom_prepare_request(drive, &req);
2354 req.cmd_type = REQ_TYPE_SPECIAL;
2355 req.cmd_flags = REQ_QUIET;
2356 ret = ide_do_drive_cmd(drive, &req, ide_wait);
2359 * A reset will unlock the door. If it was previously locked,
2362 if (CDROM_STATE_FLAGS(drive)->door_locked)
2363 (void) cdrom_lockdoor(drive, 1, &sense);
2370 int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position)
2372 ide_drive_t *drive = cdi->handle;
2373 struct request_sense sense;
2376 int stat = cdrom_lockdoor(drive, 0, &sense);
2381 return cdrom_eject(drive, !position, &sense);
2385 int ide_cdrom_lock_door (struct cdrom_device_info *cdi, int lock)
2387 ide_drive_t *drive = cdi->handle;
2388 return cdrom_lockdoor(drive, lock, NULL);
2392 int ide_cdrom_get_capabilities(ide_drive_t *drive, struct atapi_capabilities_page *cap)
2394 struct cdrom_info *info = drive->driver_data;
2395 struct cdrom_device_info *cdi = &info->devinfo;
2396 struct packet_command cgc;
2397 int stat, attempts = 3, size = sizeof(*cap);
2400 * ACER50 (and others?) require the full spec length mode sense
2401 * page capabilities size, but older drives break.
2403 if (!(!strcmp(drive->id->model, "ATAPI CD ROM DRIVE 50X MAX") ||
2404 !strcmp(drive->id->model, "WPI CDS-32X")))
2405 size -= sizeof(cap->pad);
2407 init_cdrom_command(&cgc, cap, size, CGC_DATA_UNKNOWN);
2408 do { /* we seem to get stat=0x01,err=0x00 the first time (??) */
2409 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
2412 } while (--attempts);
2417 void ide_cdrom_update_speed (ide_drive_t *drive, struct atapi_capabilities_page *cap)
2419 u16 curspeed, maxspeed;
2421 /* The ACER/AOpen 24X cdrom has the speed fields byte-swapped */
2422 if (!drive->id->model[0] &&
2423 !strncmp(drive->id->fw_rev, "241N", 4)) {
2424 curspeed = le16_to_cpu(cap->curspeed);
2425 maxspeed = le16_to_cpu(cap->maxspeed);
2427 curspeed = be16_to_cpu(cap->curspeed);
2428 maxspeed = be16_to_cpu(cap->maxspeed);
2431 CDROM_STATE_FLAGS(drive)->current_speed = (curspeed + (176/2)) / 176;
2432 CDROM_CONFIG_FLAGS(drive)->max_speed = (maxspeed + (176/2)) / 176;
2436 int ide_cdrom_select_speed (struct cdrom_device_info *cdi, int speed)
2438 ide_drive_t *drive = cdi->handle;
2439 struct request_sense sense;
2440 struct atapi_capabilities_page cap;
2443 if ((stat = cdrom_select_speed(drive, speed, &sense)) < 0)
2446 if (!ide_cdrom_get_capabilities(drive, &cap)) {
2447 ide_cdrom_update_speed(drive, &cap);
2448 cdi->speed = CDROM_STATE_FLAGS(drive)->current_speed;
2454 * add logic to try GET_EVENT command first to check for media and tray
2455 * status. this should be supported by newer cd-r/w and all DVD etc
2459 int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
2461 ide_drive_t *drive = cdi->handle;
2462 struct media_event_desc med;
2463 struct request_sense sense;
2466 if (slot_nr != CDSL_CURRENT)
2469 stat = cdrom_check_status(drive, &sense);
2470 if (!stat || sense.sense_key == UNIT_ATTENTION)
2473 if (!cdrom_get_media_event(cdi, &med)) {
2474 if (med.media_present)
2476 else if (med.door_open)
2477 return CDS_TRAY_OPEN;
2482 if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04)
2486 * If not using Mt Fuji extended media tray reports,
2487 * just return TRAY_OPEN since ATAPI doesn't provide
2488 * any other way to detect this...
2490 if (sense.sense_key == NOT_READY) {
2491 if (sense.asc == 0x3a && sense.ascq == 1)
2494 return CDS_TRAY_OPEN;
2496 return CDS_DRIVE_NOT_READY;
2500 int ide_cdrom_get_last_session (struct cdrom_device_info *cdi,
2501 struct cdrom_multisession *ms_info)
2503 struct atapi_toc *toc;
2504 ide_drive_t *drive = cdi->handle;
2505 struct cdrom_info *info = drive->driver_data;
2506 struct request_sense sense;
2509 if (!CDROM_STATE_FLAGS(drive)->toc_valid || info->toc == NULL)
2510 if ((ret = cdrom_read_toc(drive, &sense)))
2514 ms_info->addr.lba = toc->last_session_lba;
2515 ms_info->xa_flag = toc->xa_flag;
2521 int ide_cdrom_get_mcn (struct cdrom_device_info *cdi,
2522 struct cdrom_mcn *mcn_info)
2526 ide_drive_t *drive = cdi->handle;
2529 if ((stat = cdrom_read_subchannel(drive, 2, mcnbuf, sizeof (mcnbuf), NULL)))
2532 memcpy (mcn_info->medium_catalog_number, mcnbuf+9,
2533 sizeof (mcn_info->medium_catalog_number)-1);
2534 mcn_info->medium_catalog_number[sizeof (mcn_info->medium_catalog_number)-1]
2542 /****************************************************************************
2543 * Other driver requests (open, close, check media change).
2547 int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi,
2550 ide_drive_t *drive = cdi->handle;
2553 if (slot_nr == CDSL_CURRENT) {
2554 (void) cdrom_check_status(drive, NULL);
2555 retval = CDROM_STATE_FLAGS(drive)->media_changed;
2556 CDROM_STATE_FLAGS(drive)->media_changed = 0;
2565 int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose)
2571 * Close down the device. Invalidate all cached blocks.
2575 void ide_cdrom_release_real (struct cdrom_device_info *cdi)
2577 ide_drive_t *drive = cdi->handle;
2579 if (!cdi->use_count)
2580 CDROM_STATE_FLAGS(drive)->toc_valid = 0;
2583 #define IDE_CD_CAPABILITIES \
2584 (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
2585 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
2586 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
2587 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
2588 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
2590 static struct cdrom_device_ops ide_cdrom_dops = {
2591 .open = ide_cdrom_open_real,
2592 .release = ide_cdrom_release_real,
2593 .drive_status = ide_cdrom_drive_status,
2594 .media_changed = ide_cdrom_check_media_change_real,
2595 .tray_move = ide_cdrom_tray_move,
2596 .lock_door = ide_cdrom_lock_door,
2597 .select_speed = ide_cdrom_select_speed,
2598 .get_last_session = ide_cdrom_get_last_session,
2599 .get_mcn = ide_cdrom_get_mcn,
2600 .reset = ide_cdrom_reset,
2601 .audio_ioctl = ide_cdrom_audio_ioctl,
2602 .capability = IDE_CD_CAPABILITIES,
2603 .generic_packet = ide_cdrom_packet,
2606 static int ide_cdrom_register (ide_drive_t *drive, int nslots)
2608 struct cdrom_info *info = drive->driver_data;
2609 struct cdrom_device_info *devinfo = &info->devinfo;
2611 devinfo->ops = &ide_cdrom_dops;
2613 devinfo->speed = CDROM_STATE_FLAGS(drive)->current_speed;
2614 devinfo->capacity = nslots;
2615 devinfo->handle = drive;
2616 strcpy(devinfo->name, drive->name);
2618 /* set capability mask to match the probe. */
2619 if (!CDROM_CONFIG_FLAGS(drive)->cd_r)
2620 devinfo->mask |= CDC_CD_R;
2621 if (!CDROM_CONFIG_FLAGS(drive)->cd_rw)
2622 devinfo->mask |= CDC_CD_RW;
2623 if (!CDROM_CONFIG_FLAGS(drive)->dvd)
2624 devinfo->mask |= CDC_DVD;
2625 if (!CDROM_CONFIG_FLAGS(drive)->dvd_r)
2626 devinfo->mask |= CDC_DVD_R;
2627 if (!CDROM_CONFIG_FLAGS(drive)->dvd_ram)
2628 devinfo->mask |= CDC_DVD_RAM;
2629 if (!CDROM_CONFIG_FLAGS(drive)->is_changer)
2630 devinfo->mask |= CDC_SELECT_DISC;
2631 if (!CDROM_CONFIG_FLAGS(drive)->audio_play)
2632 devinfo->mask |= CDC_PLAY_AUDIO;
2633 if (!CDROM_CONFIG_FLAGS(drive)->close_tray)
2634 devinfo->mask |= CDC_CLOSE_TRAY;
2635 if (!CDROM_CONFIG_FLAGS(drive)->mo_drive)
2636 devinfo->mask |= CDC_MO_DRIVE;
2637 if (!CDROM_CONFIG_FLAGS(drive)->ram)
2638 devinfo->mask |= CDC_RAM;
2640 if (CDROM_CONFIG_FLAGS(drive)->no_speed_select)
2641 devinfo->mask |= CDC_SELECT_SPEED;
2643 devinfo->disk = info->disk;
2644 return register_cdrom(devinfo);
2648 int ide_cdrom_probe_capabilities (ide_drive_t *drive)
2650 struct cdrom_info *info = drive->driver_data;
2651 struct cdrom_device_info *cdi = &info->devinfo;
2652 struct atapi_capabilities_page cap;
2655 if (drive->media == ide_optical) {
2656 CDROM_CONFIG_FLAGS(drive)->mo_drive = 1;
2657 CDROM_CONFIG_FLAGS(drive)->ram = 1;
2658 printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
2662 if (CDROM_CONFIG_FLAGS(drive)->nec260 ||
2663 !strcmp(drive->id->model,"STINGRAY 8422 IDE 8X CD-ROM 7-27-95")) {
2664 CDROM_CONFIG_FLAGS(drive)->no_eject = 0;
2665 CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
2670 * we have to cheat a little here. the packet will eventually
2671 * be queued with ide_cdrom_packet(), which extracts the
2672 * drive from cdi->handle. Since this device hasn't been
2673 * registered with the Uniform layer yet, it can't do this.
2674 * Same goes for cdi->ops.
2676 cdi->handle = drive;
2677 cdi->ops = &ide_cdrom_dops;
2679 if (ide_cdrom_get_capabilities(drive, &cap))
2683 CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
2685 CDROM_CONFIG_FLAGS(drive)->no_eject = 0;
2687 CDROM_CONFIG_FLAGS(drive)->cd_r = 1;
2688 if (cap.cd_rw_write) {
2689 CDROM_CONFIG_FLAGS(drive)->cd_rw = 1;
2690 CDROM_CONFIG_FLAGS(drive)->ram = 1;
2692 if (cap.dvd_ram_read || cap.dvd_r_read || cap.dvd_rom)
2693 CDROM_CONFIG_FLAGS(drive)->dvd = 1;
2694 if (cap.dvd_ram_write) {
2695 CDROM_CONFIG_FLAGS(drive)->dvd_ram = 1;
2696 CDROM_CONFIG_FLAGS(drive)->ram = 1;
2698 if (cap.dvd_r_write)
2699 CDROM_CONFIG_FLAGS(drive)->dvd_r = 1;
2701 CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
2702 if (cap.mechtype == mechtype_caddy || cap.mechtype == mechtype_popup)
2703 CDROM_CONFIG_FLAGS(drive)->close_tray = 0;
2705 /* Some drives used by Apple don't advertise audio play
2706 * but they do support reading TOC & audio datas
2708 if (strcmp(drive->id->model, "MATSHITADVD-ROM SR-8187") == 0 ||
2709 strcmp(drive->id->model, "MATSHITADVD-ROM SR-8186") == 0 ||
2710 strcmp(drive->id->model, "MATSHITADVD-ROM SR-8176") == 0 ||
2711 strcmp(drive->id->model, "MATSHITADVD-ROM SR-8174") == 0)
2712 CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
2714 #if ! STANDARD_ATAPI
2715 if (cdi->sanyo_slot > 0) {
2716 CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
2721 #endif /* not STANDARD_ATAPI */
2722 if (cap.mechtype == mechtype_individual_changer ||
2723 cap.mechtype == mechtype_cartridge_changer) {
2724 nslots = cdrom_number_of_slots(cdi);
2726 CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
2729 ide_cdrom_update_speed(drive, &cap);
2730 /* don't print speed if the drive reported 0.
2732 printk(KERN_INFO "%s: ATAPI", drive->name);
2733 if (CDROM_CONFIG_FLAGS(drive)->max_speed)
2734 printk(" %dX", CDROM_CONFIG_FLAGS(drive)->max_speed);
2735 printk(" %s", CDROM_CONFIG_FLAGS(drive)->dvd ? "DVD-ROM" : "CD-ROM");
2737 if (CDROM_CONFIG_FLAGS(drive)->dvd_r|CDROM_CONFIG_FLAGS(drive)->dvd_ram)
2739 (CDROM_CONFIG_FLAGS(drive)->dvd_r)? "-R" : "",
2740 (CDROM_CONFIG_FLAGS(drive)->dvd_ram)? "-RAM" : "");
2742 if (CDROM_CONFIG_FLAGS(drive)->cd_r|CDROM_CONFIG_FLAGS(drive)->cd_rw)
2744 (CDROM_CONFIG_FLAGS(drive)->cd_r)? "-R" : "",
2745 (CDROM_CONFIG_FLAGS(drive)->cd_rw)? "/RW" : "");
2747 if (CDROM_CONFIG_FLAGS(drive)->is_changer)
2748 printk(" changer w/%d slots", nslots);
2752 printk(KERN_CONT ", %dkB Cache\n", be16_to_cpu(cap.buffer_size));
2757 #ifdef CONFIG_IDE_PROC_FS
2758 static void ide_cdrom_add_settings(ide_drive_t *drive)
2760 ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
2763 static inline void ide_cdrom_add_settings(ide_drive_t *drive) { ; }
2767 * standard prep_rq_fn that builds 10 byte cmds
2769 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
2771 int hard_sect = queue_hardsect_size(q);
2772 long block = (long)rq->hard_sector / (hard_sect >> 9);
2773 unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
2775 memset(rq->cmd, 0, sizeof(rq->cmd));
2777 if (rq_data_dir(rq) == READ)
2778 rq->cmd[0] = GPCMD_READ_10;
2780 rq->cmd[0] = GPCMD_WRITE_10;
2785 rq->cmd[2] = (block >> 24) & 0xff;
2786 rq->cmd[3] = (block >> 16) & 0xff;
2787 rq->cmd[4] = (block >> 8) & 0xff;
2788 rq->cmd[5] = block & 0xff;
2791 * and transfer length
2793 rq->cmd[7] = (blocks >> 8) & 0xff;
2794 rq->cmd[8] = blocks & 0xff;
2800 * Most of the SCSI commands are supported directly by ATAPI devices.
2801 * This transform handles the few exceptions.
2803 static int ide_cdrom_prep_pc(struct request *rq)
2808 * Transform 6-byte read/write commands to the 10-byte version
2810 if (c[0] == READ_6 || c[0] == WRITE_6) {
2817 c[0] += (READ_10 - READ_6);
2823 * it's silly to pretend we understand 6-byte sense commands, just
2824 * reject with ILLEGAL_REQUEST and the caller should take the
2825 * appropriate action
2827 if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
2828 rq->errors = ILLEGAL_REQUEST;
2829 return BLKPREP_KILL;
2835 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
2837 if (blk_fs_request(rq))
2838 return ide_cdrom_prep_fs(q, rq);
2839 else if (blk_pc_request(rq))
2840 return ide_cdrom_prep_pc(rq);
2846 int ide_cdrom_setup (ide_drive_t *drive)
2848 struct cdrom_info *info = drive->driver_data;
2849 struct cdrom_device_info *cdi = &info->devinfo;
2852 blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
2853 blk_queue_dma_alignment(drive->queue, 31);
2854 drive->queue->unplug_delay = (1 * HZ) / 1000;
2855 if (!drive->queue->unplug_delay)
2856 drive->queue->unplug_delay = 1;
2858 drive->special.all = 0;
2860 CDROM_STATE_FLAGS(drive)->media_changed = 1;
2863 CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
2865 if ((drive->id->config & 0x0060) == 0x20)
2866 CDROM_CONFIG_FLAGS(drive)->drq_interrupt = 1;
2867 CDROM_CONFIG_FLAGS(drive)->no_eject = 1;
2868 CDROM_CONFIG_FLAGS(drive)->close_tray = 1;
2870 /* limit transfer size per interrupt. */
2871 /* a testament to the nice quality of Samsung drives... */
2872 if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2430"))
2873 CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
2874 else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2432"))
2875 CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
2876 /* the 3231 model does not support the SET_CD_SPEED command */
2877 else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-3231"))
2878 CDROM_CONFIG_FLAGS(drive)->no_speed_select = 1;
2880 #if ! STANDARD_ATAPI
2881 if (strcmp (drive->id->model, "V003S0DS") == 0 &&
2882 drive->id->fw_rev[4] == '1' &&
2883 drive->id->fw_rev[6] <= '2') {
2885 Some versions of this drive like to talk BCD. */
2886 CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1;
2887 CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1;
2889 else if (strcmp (drive->id->model, "V006E0DS") == 0 &&
2890 drive->id->fw_rev[4] == '1' &&
2891 drive->id->fw_rev[6] <= '2') {
2892 /* Vertos 600 ESD. */
2893 CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1;
2895 else if (strcmp(drive->id->model, "NEC CD-ROM DRIVE:260") == 0 &&
2896 strncmp(drive->id->fw_rev, "1.01", 4) == 0) { /* FIXME */
2897 /* Old NEC260 (not R).
2898 This drive was released before the 1.2 version
2900 CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1;
2901 CDROM_CONFIG_FLAGS(drive)->nec260 = 1;
2904 * Sanyo 3 CD changer uses a non-standard command for CD changing
2905 * (by default standard ATAPI support for CD changers is used).
2907 else if ((strcmp(drive->id->model, "CD-ROM CDR-C3 G") == 0) ||
2908 (strcmp(drive->id->model, "CD-ROM CDR-C3G") == 0) ||
2909 (strcmp(drive->id->model, "CD-ROM CDR_C36") == 0)) {
2910 /* uses CD in slot 0 when value is set to 3 */
2911 cdi->sanyo_slot = 3;
2913 #endif /* not STANDARD_ATAPI */
2915 nslots = ide_cdrom_probe_capabilities (drive);
2918 * set correct block size
2920 blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
2922 if (drive->autotune == IDE_TUNE_DEFAULT ||
2923 drive->autotune == IDE_TUNE_AUTO)
2924 drive->dsc_overlap = (drive->next != drive);
2926 if (ide_cdrom_register(drive, nslots)) {
2927 printk (KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
2928 info->devinfo.handle = NULL;
2931 ide_cdrom_add_settings(drive);
2935 #ifdef CONFIG_IDE_PROC_FS
2937 sector_t ide_cdrom_capacity (ide_drive_t *drive)
2939 unsigned long capacity, sectors_per_frame;
2941 if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
2944 return capacity * sectors_per_frame;
2948 static void ide_cd_remove(ide_drive_t *drive)
2950 struct cdrom_info *info = drive->driver_data;
2952 ide_proc_unregister_driver(drive, info->driver);
2954 del_gendisk(info->disk);
2959 static void ide_cd_release(struct kref *kref)
2961 struct cdrom_info *info = to_ide_cd(kref);
2962 struct cdrom_device_info *devinfo = &info->devinfo;
2963 ide_drive_t *drive = info->drive;
2964 struct gendisk *g = info->disk;
2966 kfree(info->buffer);
2968 if (devinfo->handle == drive && unregister_cdrom(devinfo))
2969 printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
2970 "driver.\n", __FUNCTION__, drive->name);
2971 drive->dsc_overlap = 0;
2972 drive->driver_data = NULL;
2973 blk_queue_prep_rq(drive->queue, NULL);
2974 g->private_data = NULL;
2979 static int ide_cd_probe(ide_drive_t *);
2981 #ifdef CONFIG_IDE_PROC_FS
2982 static int proc_idecd_read_capacity
2983 (char *page, char **start, off_t off, int count, int *eof, void *data)
2985 ide_drive_t *drive = data;
2988 len = sprintf(page,"%llu\n", (long long)ide_cdrom_capacity(drive));
2989 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
2992 static ide_proc_entry_t idecd_proc[] = {
2993 { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
2994 { NULL, 0, NULL, NULL }
2998 static ide_driver_t ide_cdrom_driver = {
3000 .owner = THIS_MODULE,
3001 .name = "ide-cdrom",
3002 .bus = &ide_bus_type,
3004 .probe = ide_cd_probe,
3005 .remove = ide_cd_remove,
3006 .version = IDECD_VERSION,
3008 .supports_dsc_overlap = 1,
3009 .do_request = ide_do_rw_cdrom,
3010 .end_request = ide_end_request,
3011 .error = __ide_error,
3012 .abort = __ide_abort,
3013 #ifdef CONFIG_IDE_PROC_FS
3018 static int idecd_open(struct inode * inode, struct file * file)
3020 struct gendisk *disk = inode->i_bdev->bd_disk;
3021 struct cdrom_info *info;
3024 if (!(info = ide_cd_get(disk)))
3028 info->buffer = kmalloc(SECTOR_BUFFER_SIZE, GFP_KERNEL|__GFP_REPEAT);
3031 rc = cdrom_open(&info->devinfo, inode, file);
3039 static int idecd_release(struct inode * inode, struct file * file)
3041 struct gendisk *disk = inode->i_bdev->bd_disk;
3042 struct cdrom_info *info = ide_cd_g(disk);
3044 cdrom_release (&info->devinfo, file);
3051 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
3053 struct packet_command cgc;
3058 if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
3061 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
3063 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
3067 buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
3068 return cdrom_mode_select(cdi, &cgc);
3071 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
3073 struct packet_command cgc;
3078 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
3080 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
3084 spindown = buffer[11] & 0x0f;
3085 if (copy_to_user((void __user *)arg, &spindown, sizeof (char)))
3090 static int idecd_ioctl (struct inode *inode, struct file *file,
3091 unsigned int cmd, unsigned long arg)
3093 struct block_device *bdev = inode->i_bdev;
3094 struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
3098 case CDROMSETSPINDOWN:
3099 return idecd_set_spindown(&info->devinfo, arg);
3100 case CDROMGETSPINDOWN:
3101 return idecd_get_spindown(&info->devinfo, arg);
3106 err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
3108 err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
3113 static int idecd_media_changed(struct gendisk *disk)
3115 struct cdrom_info *info = ide_cd_g(disk);
3116 return cdrom_media_changed(&info->devinfo);
3119 static int idecd_revalidate_disk(struct gendisk *disk)
3121 struct cdrom_info *info = ide_cd_g(disk);
3122 struct request_sense sense;
3123 cdrom_read_toc(info->drive, &sense);
3127 static struct block_device_operations idecd_ops = {
3128 .owner = THIS_MODULE,
3130 .release = idecd_release,
3131 .ioctl = idecd_ioctl,
3132 .media_changed = idecd_media_changed,
3133 .revalidate_disk= idecd_revalidate_disk
3137 static char *ignore = NULL;
3139 module_param(ignore, charp, 0400);
3140 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
3142 static int ide_cd_probe(ide_drive_t *drive)
3144 struct cdrom_info *info;
3146 struct request_sense sense;
3148 if (!strstr("ide-cdrom", drive->driver_req))
3150 if (!drive->present)
3152 if (drive->media != ide_cdrom && drive->media != ide_optical)
3154 /* skip drives that we were told to ignore */
3155 if (ignore != NULL) {
3156 if (strstr(ignore, drive->name)) {
3157 printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
3162 printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
3165 info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
3167 printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
3171 g = alloc_disk(1 << PARTN_BITS);
3175 ide_init_disk(g, drive);
3177 ide_proc_register_driver(drive, &ide_cdrom_driver);
3179 kref_init(&info->kref);
3181 info->drive = drive;
3182 info->driver = &ide_cdrom_driver;
3185 g->private_data = &info->driver;
3187 drive->driver_data = info;
3190 g->driverfs_dev = &drive->gendev;
3191 g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
3192 if (ide_cdrom_setup(drive)) {
3193 ide_proc_unregister_driver(drive, &ide_cdrom_driver);
3194 ide_cd_release(&info->kref);
3198 cdrom_read_toc(drive, &sense);
3199 g->fops = &idecd_ops;
3200 g->flags |= GENHD_FL_REMOVABLE;
3210 static void __exit ide_cdrom_exit(void)
3212 driver_unregister(&ide_cdrom_driver.gen_driver);
3215 static int __init ide_cdrom_init(void)
3217 return driver_register(&ide_cdrom_driver.gen_driver);
3220 MODULE_ALIAS("ide:*m-cdrom*");
3221 module_init(ide_cdrom_init);
3222 module_exit(ide_cdrom_exit);
3223 MODULE_LICENSE("GPL");