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SubjectRe: [PARIDE] Datastor EP-2000 problem
On Thu, 29 May 2008 02:04:59 +0200 Rene Herman <rene.herman@keyaccess.nl> wrote:

> Good day.
>
> Dug up a parallel port CD-RW consisting of a Philips CDD3801 24x/2x/2x
> ATAPI CD-RW hooked up to a Datastor EP-2000 parallel interface chip.
>
> The drive has been verified to work correctly when used directly as IDE
> and the parallel interface has been verified to work correctly with some
> random other CD-ROM drive. The combination bombs out though.
>
> The drive is found:
>
> root@ax6bc:~# modprobe dstr
> root@ax6bc:~# modprobe pcd
> root@ax6bc:~# dmesg | tail -6
> pcd: pcd version 1.07, major 46, nice 0
> pcd0: Sharing parport0 at 0x378
> pcd0: dstr 1.01, DataStor EP2000 at 0x378, mode 4 (EPP-32), delay 1
> pcd0: Master: R/RW 2x2x24
> pcd0: mode sense capabilities completion: alt=0x51 stat=0x51 err=0x60
> loop=0 phase=3
> pcd0: mode sense capabilities: Sense key: 6, ASC: 29, ASQ: 0
>
> trying to extract any data from it fails though:
>
> root@ax6bc:~# dd if=/dev/pcd0 of=/dev/null bs=2048 count=1
> 0+0 records in
> 0+0 records out
> 0 bytes (0 B) copied, 12.5765 s, 0.0 kB/s
>
> root@ax6bc:~# dmesg | tail -14
> pcd: pcd version 1.07, major 46, nice 0
> pcd0: Sharing parport0 at 0x378
> pcd0: dstr 1.01, DataStor EP2000 at 0x378, mode 4 (EPP-32), delay 1
> pcd0: Master: R/RW 2x2x24
> pcd0: mode sense capabilities completion: alt=0x51 stat=0x51 err=0x60
> loop=0 phase=3
> pcd0: mode sense capabilities: Sense key: 6, ASC: 29, ASQ: 0
> pcd0: WARNING: ATAPI phase errors
> pcd0: Stuck DRQ
> pcd0: lock door before command: alt=0x58 stat=0x58 err=0x100 loop=64001
> phase=2
> pcd0: Request sense before command: alt=0x58 stat=0x58 err=0x100
> loop=64001 phase=2
> pcd0: generic packet before command: alt=0x58 stat=0x58 err=0x100
> loop=64001 phase=2
> pcd0: Request sense before command: alt=0x58 stat=0x58 err=0x100
> loop=64001 phase=2
> pcd0: unlock door before command: alt=0x58 stat=0x58 err=0x100
> loop=64001 phase=2
> pcd0: Request sense before command: alt=0x58 stat=0x58 err=0x100
> loop=64001 phase=2
>
> and at this point the drive's stuck and needs a power cycle. I've tried
> all modes available (4-bit, 8-bit, EPP-8, EPP-16 and EPP-32) and delays
> from 0 to 10 and nothing changes behaviour.
>
> Changing the parallel port type in my BIOS from Normal to EPP to ECP to
> ECP+EPP, no change.
>
> Behaviour was also the same with the drive's original firmware (which I
> can sort of guarentee was the one it originally came with) and its
> current most recent 1.7e firmware.
>
> I even tested a prehistoric 2.2.6 kernel where things were/are the same
> again.
>
> As said, interface works with a different (CD-ROM) drive and drive works
> fine as plain IDE. I haven't been able to test if it works correctly
> under DOS or Windows with its own drivers as I don't have the drivers
> and can't find them online. If anyone has DOS or Windows EP-2000
> drivers; a pointer would be mightely appreciated.
>
> Anyone any idea what this could be? Can patch/debug...
>

I don't know of anyone who is likely to investigate this, sorry. All I
can suggest is that you file it at bugzilla.kernel.org and be very
patient :(


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