Date: Mon, 04 Nov 1996 21:45:08 -0800 From: Peter Haight <peterh@prognet.com> To: freebsd-hardware@freebsd.org Subject: Device driver specs and an ATAPI CD-ROM (Sanyo Torisan CDR-S1G drive) Message-ID: <3.0b36.32.19961104214507.011c0f04@prognet.com>
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I've got a CD-ROM that half works with Freebsd-2.2-961014-SNAP. Basically if you tell it to play from the beginning, it will play the CD all the way through, but it has the track information messed up (different results depending on which cd playing program you use). It basically boils down to the fact that the CDROM apparently doesn't implement ATAPI correctly. It doesn't support the READ CD-ROM CAPACITY ATAPI packet command. (Executing this command produces an AER_SK_ILLEGAL_REQUEST). This keeps the FreeBSD ioctl library from correctly generating the leadout track. This leads to general weirdness in the different software because they use the leadout track to determine where the end of the last valid track is. Now, I really don't care whether this problem gets fixed or not, I can swap this CDROM with the one in my Windows95 box which has a driver that seems to work with this drive and the CDROM in the Window95 box works fine with FreeBSD. This was mostly just an exercise to learn about FreeBSD and its device drivers. There is one thing I do want to know, though. I figure that since the Window95 driver works, there must be some way to figure out the length of the last track. I can't seem to find anything that will work in any of the other ATAPI commands, so I figure that this drive must have a command similar to READ CD-ROM CAPACITY but not exactly the same as the ATAPI standard. Finally, we have hit my question: How can I get the specification for this drive to determine whether such a command exists? I have searched on the web quite a bit for anything related to Torisan, CDR-S1G, and/or Sanyo, but haven't come up with anything. I'm having problems even getting an address or phone number for Sanyo which I could use. Any suggestions? Is there some repository for this sort of information somewhere? Is ther some secret way to get companies to give you specs?
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