diff options
Diffstat (limited to 'sys/scsi/cd.c')
| -rw-r--r-- | sys/scsi/cd.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sys/scsi/cd.c b/sys/scsi/cd.c index 08ee3872ae7..31105662554 100644 --- a/sys/scsi/cd.c +++ b/sys/scsi/cd.c @@ -86,11 +86,17 @@ struct cd_softc { #define CDF_WLABEL 0x04 /* label is writable */ #define CDF_LABELLING 0x08 /* writing label */ #define CDF_ANCIENT 0x10 /* disk is ancient; for minphys */ +#ifdef CDDA +#define CDF_CDDAMODE 0x08 +#endif struct scsi_link *sc_link; /* contains our targ, lun, etc. */ struct cd_parms { int blksize; u_long disksize; /* total number sectors */ } params; +#ifdef CDDA + struct cd_parms orig_params; /* filled in when CD-DA mode starts */ +#endif struct buf buf_queue; }; @@ -267,6 +273,18 @@ cdopen(dev, flag, fmt, p) if ((error = cdlock(cd)) != 0) return error; +#ifdef CDDA + /* + * We can't open the block device if the drive is in CDDA + * mode. If we allow such opens, either the drive will get + * quite unhappy about undersized I/O or the BSD I/O subsystem + * will start trashing memory with disk transfers overrunning + * the end of their buffers. Either way, it's Bad. + */ + if (cd->flags & CDF_CDDAMODE && fmt == S_IFBLK) + return EBUSY; +#endif + if (cd->sc_dk.dk_openmask != 0) { /* * If any partition is open, but the disk has been invalidated, @@ -276,6 +294,16 @@ cdopen(dev, flag, fmt, p) error = EIO; goto bad3; } +#ifdef CDDA + /* + * If it's in CDDA mode, process may only open the + * raw partition + */ + if (cd->flags & CDF_CDDAMODE && part != RAW_PART) { + error = EBUSY; + goto bad3; + } +#endif } else { /* Check that it is still responding and ok. */ error = scsi_test_unit_ready(sc_link, @@ -432,6 +460,18 @@ cdstrategy(bp) if (bp->b_bcount == 0) goto done; +#ifdef CDDA + /* + * If in CDDA mode, return immediately (the user must issue + * SCSI read commands directly using SCIOCCOMMAND). The BSD + * I/O subsystem just can't deal with bizzare block sizes like + * those used for CD-DA frames. + */ + if (cd->flags & CDF_CDDAMODE) { + bp->b_error = EIO; + goto bad; + } +#endif /* * Do bounds checking, adjust transfer. if error, process. * If end of partition, just return. @@ -909,6 +949,66 @@ cdioctl(dev, cmd, addr, flag, p) return 0; case CDIOCRESET: return cd_reset(cd); +#ifdef CDDA + case CDIOCSETCDDA: { + int onoff = *(int *)addr; + /* select CD-DA mode */ + struct cd_mode_data data; + + if (CDPART(dev) != RAW_PART) + return ENOTTY; + if (error = cd_get_mode(cd, &data, AUDIO_PAGE)) + return error; + if (onoff) { + /* turn it on */ + if (cd->flags & CDF_CDDAMODE) + return EALREADY; + /* + * do not permit changing of block size if the block + * device is open, or if some other partition (not + * a raw partition) is open. + */ + if (cd->sc_dk.dk_bopenmask || + (cd->sc_dk.dk_copenmask & ~(1 << RAW_PART))) + return EBUSY; + + data.blk_desc.density = CD_DA_DENSITY_CODE; + data.blk_desc.blklen[0] = (CD_DA_BLKSIZ >> 16) & 0xff; + data.blk_desc.blklen[1] = (CD_DA_BLKSIZ >> 8) & 0xff; + data.blk_desc.blklen[2] = CD_DA_BLKSIZ & 0xff; + + if (cd_set_mode(cd, &data) != 0) + return EIO; + + cd->orig_params = cd->params; + cd->flags |= CDF_CDDAMODE; + } else { + if (!(cd->flags & CDF_CDDAMODE)) + return EALREADY; + /* turn it off */ + data.blk_desc.density = CD_NORMAL_DENSITY_CODE; + data.blk_desc.blklen[0] = (cd->orig_params.blksize >> 16) & 0xff; + data.blk_desc.blklen[1] = (cd->orig_params.blksize >> 8) & 0xff; + data.blk_desc.blklen[2] = (cd->orig_params.blksize) & 0xff; + + if (cd_set_mode(cd, &data) != 0) + return EIO; + + cd->flags &= ~CDF_CDDAMODE; + cd->params = cd->orig_params; + } + if (cd_get_parms(cd, 0) != 0) { + data.blk_desc.density = CD_NORMAL_DENSITY_CODE; + data.blk_desc.blklen[0] = (cd->orig_params.blksize >> 16) & 0xff; + data.blk_desc.blklen[1] = (cd->orig_params.blksize >> 8) & 0xff; + data.blk_desc.blklen[2] = (cd->orig_params.blksize) & 0xff; + (void) cd_set_mode(cd, &data); /* it better work...! */ + cd->params = cd->orig_params; + return EIO; + } + return 0; + } +#endif default: if (CDPART(dev) != RAW_PART) |