- stretch 11.0-1
MCD(4) | Device Drivers Manual | MCD(4) |
NAME¶
mcd
—
SYNOPSIS¶
device mcd
In /boot/device.hints:
hint.mcd.0.at="isa"
hint.mcd.0.port="0x300"
hint.mcd.0.irq="10"
DESCRIPTION¶
Themcd
driver provides a data and audio interface to
the Mitsumi-brand CD-ROM player. The CD-ROM player must be interfaced to the
ISA bus through one of the Mitsumi proprietary controller boards. The
controller boards supported are the LU002S, LU005S, the FX001 and the quite
common FX001D.
The mcd
driver responds to disk-specific
ioctl
() commands, namely the
DIOCGPART
command. Other disk-specific
ioctl
() commands will return an error.
The mcd
driver also responds to special
CD-ROM ioctl
() commands. These commands control the
CD-ROM player's audio features. The commands are:
- CDIOCREADSUBCHANNEL
- get sub-channel information on current status of disc playing
- CDIOCREADTOCHEADER
- get table of contents header
- CDIOCREADTOCENTRYS
- gets all of the table of contents
- CDIOCPLAYTRACKS
- begins audio playing at location specified
- CDIOCPLAYBLOCKS
- fails with error
EINVAL
- CDIOCPLAYMSF
- begins audio playing at location specified
- CDIOCRESUME
- resumes playing a previously paused disc
- CDIOCPAUSE
- pauses a playing disc
- CDIOCSTART
- begins playing a disc
- CDIOCSTOP
- stops a previously playing disc
- CDIOCEJECT
- opens the disc tray (there is no support for a corresponding un-eject command).
- CDIOCRESET
- stops any play and resets the Mitsumi controller board
- CDIOCSETDEBUG
- cause the kernel to print debug messages to the console about the
mcd
driver - CDIOCCLRDEBUG
- cause the kernel to quit printing debug messages about the
mcd
driver
The ioctl
() commands defined above are the
only ones that the mcd
driver supports. There are
other CD-ROM related ioctl
() commands (such as
CDIOCSETVOL
and
CDIOCSETSTERIO
) which are available and may be
supported by future versions of the driver.
FILES¶
- /dev/(r)mcd0a
- accesses BSD partition on the disc. Normally, there is only one file system on a CD-ROM disc.
- /dev/(r)mcd0c
- accesses raw device.
NOTES¶
The character-mode devices for themcd
driver should
only be used for accessing the audio features of the CD-ROM player as the
performance on data is abysmal.
The current version of the driver uses neither the DMA or IRQ features of the interface board, although it has an interrupt handler for any IRQ requests that are generated. Until the DMA features are supported, the only interrupts that the board generates are those that are not supported by the driver anyway.
SEE ALSO¶
<sys/cdio.h>
HISTORY¶
Anmcd
driver appeared in FreeBSD
1.0.
AUTHORS¶
The driver was written by Holger Veit (data part) and Brian Moore (audio part). Changes were provided by Gary Clark II, Andrew A. Chernov, and Jordan K. Hubbard.December 8, 1994 | Linux 4.9.0-9-amd64 |