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|
/*
* 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/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;
}
int ide_cdrom_check_media_change_real(struct cdrom_device_info *cdi,
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;
} else {
return -EINVAL;
}
}
/* 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
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