diff options
Diffstat (limited to 'drivers/ide/ide-cd_ioctl.c')
| -rw-r--r-- | drivers/ide/ide-cd_ioctl.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c new file mode 100644 index 000000000..4a6e1a413 --- /dev/null +++ b/drivers/ide/ide-cd_ioctl.c @@ -0,0 +1,467 @@ +// 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 scsi_sense_hdr sshdr; + int stat; + + if (slot_nr != CDSL_CURRENT) + return -EINVAL; + + stat = cdrom_check_status(drive, &sshdr); + if (!stat || sshdr.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 (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04 + && sshdr.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 (sshdr.sense_key == NOT_READY) { + if (sshdr.asc == 0x3a && sshdr.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 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, NULL, 0, 0); +} + +/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */ +static +int ide_cd_lockdoor(ide_drive_t *drive, int lockflag) +{ + struct scsi_sense_hdr sshdr; + int stat; + + /* 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, + &sshdr, 0, 0); + } + + /* If we got an illegal field error, the drive + probably cannot lock the door. */ + if (stat != 0 && + sshdr.sense_key == ILLEGAL_REQUEST && + (sshdr.asc == 0x24 || sshdr.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 && sshdr.sense_key == NOT_READY && sshdr.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; + + if (position) { + int stat = ide_cd_lockdoor(drive, 0); + + if (stat) + return stat; + } + + return cdrom_eject(drive, !position); +} + +int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock) +{ + ide_drive_t *drive = cdi->handle; + + return ide_cd_lockdoor(drive, lock); +} + +/* + * 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; + 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, NULL, 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; + int ret; + + if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) { + ret = ide_cd_read_toc(drive); + 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 *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); + + 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; + 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, NULL, 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); + 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->sshdr) + memset(cgc->sshdr, 0, sizeof(*cgc->sshdr)); + + 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->sshdr, cgc->timeout, flags); + if (!cgc->stat) + cgc->buflen -= len; + return cgc->stat; +} |