mcd(4) [netbsd man page]
MCD(4) BSD Kernel Interfaces Manual MCD(4) NAME
mcd -- Mitsumi CD-ROM driver SYNOPSIS
mcd0 at isa? port 0x300 irq 10 options MCD_PROMISC DESCRIPTION
The mcd driver provides support for Mitsumi CD-ROM controller and drive on the isa(4) bus. FILES
/dev/cd[0-9][a-h] block mode Mitsumi CD-ROM devices /dev/rmcd[0-9][a-h] raw mode Mitsumi CD-ROM devices SEE ALSO
intro(4), isa(4), ne(4), we(4) BUGS
The mcd hardware is difficult to probe accurately. Historically, the mcd probe would accept any return values as indicating that an mcd drive was present. Other devices, particularly ne(4) or we(4), would then be incorrectly claimed by the mcd driver. The driver now only accepts result codes known to indicate Mitsumi-compatible CD controllers, but may reject some mcd hardware which returns other result codes. options MCD_PROMISC enables the original promiscuous probe behaviour. Use with extreme caution. BSD
November 29, 1994 BSD
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MCD(4) BSD Kernel Interfaces Manual MCD(4) NAME
mcd -- Mitsumi CD-ROM driver SYNOPSIS
device mcd In /boot/device.hints: hint.mcd.0.at="isa" hint.mcd.0.port="0x300" hint.mcd.0.irq="10" DESCRIPTION
The mcd 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 DIOCGDINFO, DIOCGPART, DIOCWDINFO, and DIOCSDINFO, commands. 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 the mcd 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
An mcd 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. BSD
December 8, 1994 BSD