--- /dev/null
+/*
+ * 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, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_SPECIAL;
+ rq->cmd_flags = REQ_QUIET;
+ ret = blk_execute_rq(drive->queue, cd->disk, rq, 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;
+ unsigned int 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->data_direction == CGC_DATA_WRITE)
+ flags |= REQ_WRITE;
+
+ if (cgc->sense)
+ memset(cgc->sense, 0, sizeof(struct request_sense));
+
+ if (cgc->quiet)
+ flags |= REQ_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;
+}
Code Review / kvmfornfv.git / blobdiff