[linux-2.6-block.git] / drivers / ide / ide-cd_ioctl.c

// SPDX-License-Identifier: GPL-2.0
/*
 * cdrom.c IOCTLs handling for ide-cd driver.
 *
 * Copyright (C) 1994-1996  Scott Snyder <snyder@fnald0.fnal.gov>
 * Copyright (C) 1996-1998  Erik Andersen <andersee@debian.org>
 * Copyright (C) 1998-2000  Jens Axboe <axboe@suse.de>
 */

#include <linux/kernel.h>
#include <linux/cdrom.h>
#include <linux/gfp.h>
#include <linux/ide.h>
#include <scsi/scsi.h>

#include "ide-cd.h"

/****************************************************************************
 * Other driver requests (open, close, check media change).
 */
int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
{
	return 0;
}

/*
 * Close down the device.  Invalidate all cached blocks.
 */
void ide_cdrom_release_real(struct cdrom_device_info *cdi)
{
	ide_drive_t *drive = cdi->handle;

	if (!cdi->use_count)
		drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
}

/*
 * add logic to try GET_EVENT command first to check for media and tray
 * status. this should be supported by newer cd-r/w and all DVD etc
 * drives
 */
int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
{
	ide_drive_t *drive = cdi->handle;
	struct media_event_desc med;
	struct request_sense sense;
	int stat;

	if (slot_nr != CDSL_CURRENT)
		return -EINVAL;

	stat = cdrom_check_status(drive, &sense);
	if (!stat || sense.sense_key == UNIT_ATTENTION)
		return CDS_DISC_OK;

	if (!cdrom_get_media_event(cdi, &med)) {
		if (med.media_present)
			return CDS_DISC_OK;
		else if (med.door_open)
			return CDS_TRAY_OPEN;
		else
			return CDS_NO_DISC;
	}

	if (sense.sense_key == NOT_READY && sense.asc == 0x04
			&& sense.ascq == 0x04)
		return CDS_DISC_OK;

	/*
	 * If not using Mt Fuji extended media tray reports,
	 * just return TRAY_OPEN since ATAPI doesn't provide
	 * any other way to detect this...
	 */
	if (sense.sense_key == NOT_READY) {
		if (sense.asc == 0x3a && sense.ascq == 1)
			return CDS_NO_DISC;
		else
			return CDS_TRAY_OPEN;
	}
	return CDS_DRIVE_NOT_READY;
}

/*
 * ide-cd always generates media changed event if media is missing, which
 * makes it impossible to use for proper event reporting, so disk->events
 * is cleared to 0 and the following function is used only to trigger
 * revalidation and never propagated to userland.
 */
unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
					 unsigned int clearing, int slot_nr)
{
	ide_drive_t *drive = cdi->handle;
	int retval;

	if (slot_nr == CDSL_CURRENT) {
		(void) cdrom_check_status(drive, NULL);
		retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
		drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
		return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
	} else {
		return 0;
	}
}

/* Eject the disk if EJECTFLAG is 0.
   If EJECTFLAG is 1, try to reload the disk. */
static
int cdrom_eject(ide_drive_t *drive, int ejectflag,
		struct request_sense *sense)
{
	struct cdrom_info *cd = drive->driver_data;
	struct cdrom_device_info *cdi = &cd->devinfo;
	char loej = 0x02;
	unsigned char cmd[BLK_MAX_CDB];

	if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
		return -EDRIVE_CANT_DO_THIS;

	/* reload fails on some drives, if the tray is locked */
	if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
		return 0;

	/* only tell drive to close tray if open, if it can do that */
	if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
		loej = 0;

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_START_STOP_UNIT;
	cmd[4] = loej | (ejectflag != 0);

	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
}

/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
static
int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
		    struct request_sense *sense)
{
	struct request_sense my_sense;
	int stat;

	if (sense == NULL)
		sense = &my_sense;

	/* If the drive cannot lock the door, just pretend. */
	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
		stat = 0;
	} else {
		unsigned char cmd[BLK_MAX_CDB];

		memset(cmd, 0, BLK_MAX_CDB);

		cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
		cmd[4] = lockflag ? 1 : 0;

		stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
				       sense, 0, 0);
	}

	/* If we got an illegal field error, the drive
	   probably cannot lock the door. */
	if (stat != 0 &&
	    sense->sense_key == ILLEGAL_REQUEST &&
	    (sense->asc == 0x24 || sense->asc == 0x20)) {
		printk(KERN_ERR "%s: door locking not supported\n",
			drive->name);
		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
		stat = 0;
	}

	/* no medium, that's alright. */
	if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
		stat = 0;

	if (stat == 0) {
		if (lockflag)
			drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
		else
			drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
	}

	return stat;
}

int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
{
	ide_drive_t *drive = cdi->handle;
	struct request_sense sense;

	if (position) {
		int stat = ide_cd_lockdoor(drive, 0, &sense);

		if (stat)
			return stat;
	}

	return cdrom_eject(drive, !position, &sense);
}

int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
{
	ide_drive_t *drive = cdi->handle;

	return ide_cd_lockdoor(drive, lock, NULL);
}

/*
 * ATAPI devices are free to select the speed you request or any slower
 * rate. :-(  Requesting too fast a speed will _not_ produce an error.
 */
int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
{
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *cd = drive->driver_data;
	struct request_sense sense;
	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
	int stat;
	unsigned char cmd[BLK_MAX_CDB];

	if (speed == 0)
		speed = 0xffff; /* set to max */
	else
		speed *= 177;   /* Nx to kbytes/s */

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_SET_SPEED;
	/* Read Drive speed in kbytes/second MSB/LSB */
	cmd[2] = (speed >> 8) & 0xff;
	cmd[3] = speed & 0xff;
	if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
	    (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
		/* Write Drive speed in kbytes/second MSB/LSB */
		cmd[4] = (speed >> 8) & 0xff;
		cmd[5] = speed & 0xff;
	}

	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);

	if (!ide_cdrom_get_capabilities(drive, buf)) {
		ide_cdrom_update_speed(drive, buf);
		cdi->speed = cd->current_speed;
	}

	return 0;
}

int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
			       struct cdrom_multisession *ms_info)
{
	struct atapi_toc *toc;
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *info = drive->driver_data;
	struct request_sense sense;
	int ret;

	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
		ret = ide_cd_read_toc(drive, &sense);
		if (ret)
			return ret;
	}

	toc = info->toc;
	ms_info->addr.lba = toc->last_session_lba;
	ms_info->xa_flag = toc->xa_flag;

	return 0;
}

int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
		      struct cdrom_mcn *mcn_info)
{
	ide_drive_t *drive = cdi->handle;
	int stat, mcnlen;
	char buf[24];
	unsigned char cmd[BLK_MAX_CDB];
	unsigned len = sizeof(buf);

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_READ_SUBCHANNEL;
	cmd[1] = 2;		/* MSF addressing */
	cmd[2] = 0x40;	/* request subQ data */
	cmd[3] = 2;		/* format */
	cmd[8] = len;

	stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
	if (stat)
		return stat;

	mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
	memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
	mcn_info->medium_catalog_number[mcnlen] = '\0';

	return 0;
}

int ide_cdrom_reset(struct cdrom_device_info *cdi)
{
	ide_drive_t *drive = cdi->handle;
	struct cdrom_info *cd = drive->driver_data;
	struct request_sense sense;
	struct request *rq;
	int ret;

	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
	ide_req(rq)->type = ATA_PRIV_MISC;
	rq->rq_flags = RQF_QUIET;
	blk_execute_rq(drive->queue, cd->disk, rq, 0);
	ret = scsi_req(rq)->result ? -EIO : 0;
	blk_put_request(rq);
	/*
	 * A reset will unlock the door. If it was previously locked,
	 * lock it again.
	 */
	if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
		(void)ide_cd_lockdoor(drive, 1, &sense);

	return ret;
}

static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
				struct atapi_toc_entry **ent)
{
	struct cdrom_info *info = drive->driver_data;
	struct atapi_toc *toc = info->toc;
	int ntracks;

	/*
	 * don't serve cached data, if the toc isn't valid
	 */
	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
		return -EINVAL;

	/* Check validity of requested track number. */
	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;

	if (toc->hdr.first_track == CDROM_LEADOUT)
		ntracks = 0;

	if (track == CDROM_LEADOUT)
		*ent = &toc->ent[ntracks];
	else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
		return -EINVAL;
	else
		*ent = &toc->ent[track - toc->hdr.first_track];

	return 0;
}

static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
{
	struct cdrom_ti *ti = arg;
	struct atapi_toc_entry *first_toc, *last_toc;
	unsigned long lba_start, lba_end;
	int stat;
	struct request_sense sense;
	unsigned char cmd[BLK_MAX_CDB];

	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
	if (stat)
		return stat;

	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
	if (stat)
		return stat;

	if (ti->cdti_trk1 != CDROM_LEADOUT)
		++last_toc;
	lba_start = first_toc->addr.lba;
	lba_end   = last_toc->addr.lba;

	if (lba_end <= lba_start)
		return -EINVAL;

	memset(cmd, 0, BLK_MAX_CDB);

	cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
	lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);

	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
}

static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
{
	struct cdrom_info *cd = drive->driver_data;
	struct cdrom_tochdr *tochdr = arg;
	struct atapi_toc *toc;
	int stat;

	/* Make sure our saved TOC is valid. */
	stat = ide_cd_read_toc(drive, NULL);
	if (stat)
		return stat;

	toc = cd->toc;
	tochdr->cdth_trk0 = toc->hdr.first_track;
	tochdr->cdth_trk1 = toc->hdr.last_track;

	return 0;
}

static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
{
	struct cdrom_tocentry *tocentry = arg;
	struct atapi_toc_entry *toce;
	int stat;

	stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
	if (stat)
		return stat;

	tocentry->cdte_ctrl = toce->control;
	tocentry->cdte_adr  = toce->adr;
	if (tocentry->cdte_format == CDROM_MSF) {
		lba_to_msf(toce->addr.lba,
			   &tocentry->cdte_addr.msf.minute,
			   &tocentry->cdte_addr.msf.second,
			   &tocentry->cdte_addr.msf.frame);
	} else
		tocentry->cdte_addr.lba = toce->addr.lba;

	return 0;
}

int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
			  unsigned int cmd, void *arg)
{
	ide_drive_t *drive = cdi->handle;

	switch (cmd) {
	/*
	 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
	 * atapi doesn't support it
	 */
	case CDROMPLAYTRKIND:
		return ide_cd_fake_play_trkind(drive, arg);
	case CDROMREADTOCHDR:
		return ide_cd_read_tochdr(drive, arg);
	case CDROMREADTOCENTRY:
		return ide_cd_read_tocentry(drive, arg);
	default:
		return -EINVAL;
	}
}

/* the generic packet interface to cdrom.c */
int ide_cdrom_packet(struct cdrom_device_info *cdi,
			    struct packet_command *cgc)
{
	ide_drive_t *drive = cdi->handle;
	req_flags_t flags = 0;
	unsigned len = cgc->buflen;

	if (cgc->timeout <= 0)
		cgc->timeout = ATAPI_WAIT_PC;

	/* here we queue the commands from the uniform CD-ROM
	   layer. the packet must be complete, as we do not
	   touch it at all. */

	if (cgc->sense)
		memset(cgc->sense, 0, sizeof(struct request_sense));

	if (cgc->quiet)
		flags |= RQF_QUIET;

	cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
				    cgc->data_direction == CGC_DATA_WRITE,
				    cgc->buffer, &len,
				    cgc->sense, cgc->timeout, flags);
	if (!cgc->stat)
		cgc->buflen -= len;
	return cgc->stat;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
17802998 BZ	2	/*
	3	* cdrom.c IOCTLs handling for ide-cd driver.
	4	*
	5	* Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
	6	* Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
	7	* Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
	8	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/cdrom.h>
5a0e3ad6	12	#include <linux/gfp.h>
17802998	13	#include <linux/ide.h>
f9afd18b	14	#include <scsi/scsi.h>
17802998 BZ	15
	16	#include "ide-cd.h"
	17
f9afd18b BP	18	/****************************************************************************
	19	* Other driver requests (open, close, check media change).
	20	*/
	21	int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
	22	{
	23	return 0;
	24	}
	25
	26	/*
	27	* Close down the device. Invalidate all cached blocks.
	28	*/
	29	void ide_cdrom_release_real(struct cdrom_device_info *cdi)
	30	{
	31	ide_drive_t *drive = cdi->handle;
f9afd18b BP	32
f9afd18b BP	33	if (!cdi->use_count)
570f89ea	34	drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
f9afd18b BP	35	}
	36
	37	/*
	38	* add logic to try GET_EVENT command first to check for media and tray
	39	* status. this should be supported by newer cd-r/w and all DVD etc
	40	* drives
	41	*/
	42	int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
	43	{
	44	ide_drive_t *drive = cdi->handle;
	45	struct media_event_desc med;
	46	struct request_sense sense;
	47	int stat;
	48
	49	if (slot_nr != CDSL_CURRENT)
	50	return -EINVAL;
	51
	52	stat = cdrom_check_status(drive, &sense);
	53	if (!stat \|\| sense.sense_key == UNIT_ATTENTION)
	54	return CDS_DISC_OK;
	55
	56	if (!cdrom_get_media_event(cdi, &med)) {
	57	if (med.media_present)
	58	return CDS_DISC_OK;
	59	else if (med.door_open)
	60	return CDS_TRAY_OPEN;
	61	else
	62	return CDS_NO_DISC;
	63	}
	64
	65	if (sense.sense_key == NOT_READY && sense.asc == 0x04
	66	&& sense.ascq == 0x04)
	67	return CDS_DISC_OK;
	68
	69	/*
	70	* If not using Mt Fuji extended media tray reports,
	71	* just return TRAY_OPEN since ATAPI doesn't provide
	72	* any other way to detect this...
	73	*/
	74	if (sense.sense_key == NOT_READY) {
	75	if (sense.asc == 0x3a && sense.ascq == 1)
	76	return CDS_NO_DISC;
	77	else
	78	return CDS_TRAY_OPEN;
	79	}
	80	return CDS_DRIVE_NOT_READY;
	81	}
	82
7eec77a1 TH	83	/*
	84	* ide-cd always generates media changed event if media is missing, which
	85	* makes it impossible to use for proper event reporting, so disk->events
	86	* is cleared to 0 and the following function is used only to trigger
	87	* revalidation and never propagated to userland.
	88	*/
5b03a1b1 TH	89	unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
5b03a1b1 TH	90	unsigned int clearing, int slot_nr)
f9afd18b BP	91	{
f9afd18b BP	92	ide_drive_t *drive = cdi->handle;
f9afd18b BP	93	int retval;
	94
	95	if (slot_nr == CDSL_CURRENT) {
	96	(void) cdrom_check_status(drive, NULL);
fe11edfa BZ	97	retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
fe11edfa BZ	98	drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
5b03a1b1	99	return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
f9afd18b	100	} else {
5b03a1b1	101	return 0;
f9afd18b BP	102	}
	103	}
	104
	105	/* Eject the disk if EJECTFLAG is 0.
	106	If EJECTFLAG is 1, try to reload the disk. */
	107	static
	108	int cdrom_eject(ide_drive_t *drive, int ejectflag,
	109	struct request_sense *sense)
	110	{
	111	struct cdrom_info *cd = drive->driver_data;
	112	struct cdrom_device_info *cdi = &cd->devinfo;
f9afd18b	113	char loej = 0x02;
5f828546	114	unsigned char cmd[BLK_MAX_CDB];
f9afd18b	115
570f89ea	116	if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
f9afd18b BP	117	return -EDRIVE_CANT_DO_THIS;
	118
	119	/* reload fails on some drives, if the tray is locked */
570f89ea	120	if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
f9afd18b BP	121	return 0;
f9afd18b BP	122
f9afd18b BP	123	/* only tell drive to close tray if open, if it can do that */
	124	if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
	125	loej = 0;
	126
5f828546 FT	127	memset(cmd, 0, BLK_MAX_CDB);
	128
	129	cmd[0] = GPCMD_START_STOP_UNIT;
	130	cmd[4] = loej \| (ejectflag != 0);
f9afd18b	131
1a677aba	132	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
f9afd18b BP	133	}
	134
	135	/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
	136	static
	137	int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
	138	struct request_sense *sense)
	139	{
f9afd18b	140	struct request_sense my_sense;
f9afd18b BP	141	int stat;
	142
	143	if (sense == NULL)
	144	sense = &my_sense;
	145
	146	/* If the drive cannot lock the door, just pretend. */
42619d35	147	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
f9afd18b BP	148	stat = 0;
f9afd18b BP	149	} else {
5f828546 FT	150	unsigned char cmd[BLK_MAX_CDB];
	151
	152	memset(cmd, 0, BLK_MAX_CDB);
	153
	154	cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
	155	cmd[4] = lockflag ? 1 : 0;
	156
1a677aba	157	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
5f828546	158	sense, 0, 0);
f9afd18b BP	159	}
	160
	161	/* If we got an illegal field error, the drive
	162	probably cannot lock the door. */
	163	if (stat != 0 &&
	164	sense->sense_key == ILLEGAL_REQUEST &&
	165	(sense->asc == 0x24 \|\| sense->asc == 0x20)) {
	166	printk(KERN_ERR "%s: door locking not supported\n",
	167	drive->name);
42619d35	168	drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
f9afd18b BP	169	stat = 0;
	170	}
	171
	172	/* no medium, that's alright. */
	173	if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
	174	stat = 0;
	175
	176	if (stat == 0) {
	177	if (lockflag)
570f89ea	178	drive->atapi_flags \|= IDE_AFLAG_DOOR_LOCKED;
f9afd18b	179	else
570f89ea	180	drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
f9afd18b BP	181	}
	182
	183	return stat;
	184	}
	185
	186	int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
	187	{
	188	ide_drive_t *drive = cdi->handle;
	189	struct request_sense sense;
	190
	191	if (position) {
	192	int stat = ide_cd_lockdoor(drive, 0, &sense);
	193
	194	if (stat)
	195	return stat;
	196	}
	197
	198	return cdrom_eject(drive, !position, &sense);
	199	}
	200
17802998 BZ	201	int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
	202	{
	203	ide_drive_t *drive = cdi->handle;
	204
	205	return ide_cd_lockdoor(drive, lock, NULL);
	206	}
	207
	208	/*
	209	* ATAPI devices are free to select the speed you request or any slower
	210	* rate. :-( Requesting too fast a speed will _not_ produce an error.
	211	*/
	212	int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
	213	{
	214	ide_drive_t *drive = cdi->handle;
	215	struct cdrom_info *cd = drive->driver_data;
17802998 BZ	216	struct request_sense sense;
	217	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
	218	int stat;
5f828546	219	unsigned char cmd[BLK_MAX_CDB];
17802998 BZ	220
	221	if (speed == 0)
	222	speed = 0xffff; /* set to max */
	223	else
	224	speed = 177; / Nx to kbytes/s */
	225
5f828546 FT	226	memset(cmd, 0, BLK_MAX_CDB);
	227
	228	cmd[0] = GPCMD_SET_SPEED;
17802998	229	/* Read Drive speed in kbytes/second MSB/LSB */
5f828546 FT	230	cmd[2] = (speed >> 8) & 0xff;
5f828546 FT	231	cmd[3] = speed & 0xff;
17802998 BZ	232	if ((cdi->mask & (CDC_CD_R \| CDC_CD_RW \| CDC_DVD_R)) !=
	233	(CDC_CD_R \| CDC_CD_RW \| CDC_DVD_R)) {
	234	/* Write Drive speed in kbytes/second MSB/LSB */
5f828546 FT	235	cmd[4] = (speed >> 8) & 0xff;
5f828546 FT	236	cmd[5] = speed & 0xff;
17802998 BZ	237	}
17802998 BZ	238
1a677aba	239	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
17802998 BZ	240
	241	if (!ide_cdrom_get_capabilities(drive, buf)) {
	242	ide_cdrom_update_speed(drive, buf);
	243	cdi->speed = cd->current_speed;
	244	}
	245
	246	return 0;
	247	}
	248
	249	int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
	250	struct cdrom_multisession *ms_info)
	251	{
	252	struct atapi_toc *toc;
	253	ide_drive_t *drive = cdi->handle;
	254	struct cdrom_info *info = drive->driver_data;
	255	struct request_sense sense;
	256	int ret;
	257
570f89ea	258	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 \|\| !info->toc) {
17802998 BZ	259	ret = ide_cd_read_toc(drive, &sense);
	260	if (ret)
	261	return ret;
	262	}
	263
	264	toc = info->toc;
	265	ms_info->addr.lba = toc->last_session_lba;
	266	ms_info->xa_flag = toc->xa_flag;
	267
	268	return 0;
	269	}
	270
	271	int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
	272	struct cdrom_mcn *mcn_info)
	273	{
	274	ide_drive_t *drive = cdi->handle;
	275	int stat, mcnlen;
17802998	276	char buf[24];
5f828546 FT	277	unsigned char cmd[BLK_MAX_CDB];
5f828546 FT	278	unsigned len = sizeof(buf);
17802998	279
5f828546	280	memset(cmd, 0, BLK_MAX_CDB);
17802998	281
5f828546 FT	282	cmd[0] = GPCMD_READ_SUBCHANNEL;
	283	cmd[1] = 2; /* MSF addressing */
	284	cmd[2] = 0x40; /* request subQ data */
	285	cmd[3] = 2; /* format */
	286	cmd[8] = len;
17802998	287
5f828546	288	stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
17802998 BZ	289	if (stat)
	290	return stat;
	291
	292	mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
	293	memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
	294	mcn_info->medium_catalog_number[mcnlen] = '\0';
	295
	296	return 0;
	297	}
	298
	299	int ide_cdrom_reset(struct cdrom_device_info *cdi)
	300	{
	301	ide_drive_t *drive = cdi->handle;
	302	struct cdrom_info *cd = drive->driver_data;
	303	struct request_sense sense;
0ef4c4db	304	struct request *rq;
17802998 BZ	305	int ret;
17802998 BZ	306
ff005a06	307	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
2f5a8e80	308	ide_req(rq)->type = ATA_PRIV_MISC;
e8064021	309	rq->rq_flags = RQF_QUIET;
b7819b92	310	blk_execute_rq(drive->queue, cd->disk, rq, 0);
17d5363b	311	ret = scsi_req(rq)->result ? -EIO : 0;
0ef4c4db	312	blk_put_request(rq);
17802998 BZ	313	/*
	314	* A reset will unlock the door. If it was previously locked,
	315	* lock it again.
	316	*/
570f89ea	317	if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
17802998 BZ	318	(void)ide_cd_lockdoor(drive, 1, &sense);
	319
	320	return ret;
	321	}
	322
	323	static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
	324	struct atapi_toc_entry **ent)
	325	{
	326	struct cdrom_info *info = drive->driver_data;
	327	struct atapi_toc *toc = info->toc;
	328	int ntracks;
	329
	330	/*
	331	* don't serve cached data, if the toc isn't valid
	332	*/
570f89ea	333	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
17802998 BZ	334	return -EINVAL;
	335
	336	/* Check validity of requested track number. */
	337	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
	338
	339	if (toc->hdr.first_track == CDROM_LEADOUT)
	340	ntracks = 0;
	341
	342	if (track == CDROM_LEADOUT)
	343	*ent = &toc->ent[ntracks];
	344	else if (track < toc->hdr.first_track \|\| track > toc->hdr.last_track)
	345	return -EINVAL;
	346	else
	347	*ent = &toc->ent[track - toc->hdr.first_track];
	348
	349	return 0;
	350	}
	351
	352	static int ide_cd_fake_play_trkind(ide_drive_t drive, void arg)
	353	{
	354	struct cdrom_ti *ti = arg;
	355	struct atapi_toc_entry first_toc, last_toc;
	356	unsigned long lba_start, lba_end;
	357	int stat;
17802998	358	struct request_sense sense;
5f828546	359	unsigned char cmd[BLK_MAX_CDB];
17802998 BZ	360
	361	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
	362	if (stat)
	363	return stat;
	364
	365	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
	366	if (stat)
	367	return stat;
	368
	369	if (ti->cdti_trk1 != CDROM_LEADOUT)
	370	++last_toc;
	371	lba_start = first_toc->addr.lba;
	372	lba_end = last_toc->addr.lba;
	373
	374	if (lba_end <= lba_start)
	375	return -EINVAL;
	376
5f828546	377	memset(cmd, 0, BLK_MAX_CDB);
17802998	378
5f828546 FT	379	cmd[0] = GPCMD_PLAY_AUDIO_MSF;
	380	lba_to_msf(lba_start, &cmd[3], &cmd[4], &cmd[5]);
	381	lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
17802998	382
1a677aba	383	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
17802998 BZ	384	}
	385
	386	static int ide_cd_read_tochdr(ide_drive_t drive, void arg)
	387	{
	388	struct cdrom_info *cd = drive->driver_data;
	389	struct cdrom_tochdr *tochdr = arg;
	390	struct atapi_toc *toc;
	391	int stat;
	392
	393	/* Make sure our saved TOC is valid. */
	394	stat = ide_cd_read_toc(drive, NULL);
	395	if (stat)
	396	return stat;
	397
	398	toc = cd->toc;
	399	tochdr->cdth_trk0 = toc->hdr.first_track;
	400	tochdr->cdth_trk1 = toc->hdr.last_track;
	401
	402	return 0;
	403	}
	404
	405	static int ide_cd_read_tocentry(ide_drive_t drive, void arg)
	406	{
	407	struct cdrom_tocentry *tocentry = arg;
	408	struct atapi_toc_entry *toce;
	409	int stat;
	410
	411	stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
	412	if (stat)
	413	return stat;
	414
	415	tocentry->cdte_ctrl = toce->control;
	416	tocentry->cdte_adr = toce->adr;
	417	if (tocentry->cdte_format == CDROM_MSF) {
	418	lba_to_msf(toce->addr.lba,
	419	&tocentry->cdte_addr.msf.minute,
	420	&tocentry->cdte_addr.msf.second,
	421	&tocentry->cdte_addr.msf.frame);
	422	} else
	423	tocentry->cdte_addr.lba = toce->addr.lba;
	424
	425	return 0;
	426	}
	427
	428	int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
	429	unsigned int cmd, void *arg)
	430	{
	431	ide_drive_t *drive = cdi->handle;
	432
	433	switch (cmd) {
	434	/*
	435	* emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
	436	* atapi doesn't support it
	437	*/
	438	case CDROMPLAYTRKIND:
	439	return ide_cd_fake_play_trkind(drive, arg);
	440	case CDROMREADTOCHDR:
	441	return ide_cd_read_tochdr(drive, arg);
	442	case CDROMREADTOCENTRY:
	443	return ide_cd_read_tocentry(drive, arg);
	444	default:
	445	return -EINVAL;
	446	}
	447	}
f9afd18b BP	448
	449	/* the generic packet interface to cdrom.c */
	450	int ide_cdrom_packet(struct cdrom_device_info *cdi,
	451	struct packet_command *cgc)
	452	{
f9afd18b	453	ide_drive_t *drive = cdi->handle;
e8064021	454	req_flags_t flags = 0;
5f828546	455	unsigned len = cgc->buflen;
f9afd18b BP	456
	457	if (cgc->timeout <= 0)
	458	cgc->timeout = ATAPI_WAIT_PC;
	459
	460	/* here we queue the commands from the uniform CD-ROM
	461	layer. the packet must be complete, as we do not
	462	touch it at all. */
b348487f	463
f9afd18b BP	464	if (cgc->sense)
f9afd18b BP	465	memset(cgc->sense, 0, sizeof(struct request_sense));
f9afd18b BP	466
f9afd18b BP	467	if (cgc->quiet)
e8064021	468	flags \|= RQF_QUIET;
f9afd18b	469
5f828546 FT	470	cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
	471	cgc->data_direction == CGC_DATA_WRITE,
	472	cgc->buffer, &len,
	473	cgc->sense, cgc->timeout, flags);
f9afd18b	474	if (!cgc->stat)
5f828546	475	cgc->buflen -= len;
f9afd18b BP	476	return cgc->stat;
f9afd18b BP	477	}