From: Sancho Dauskardt <[EMAIL PROTECTED]>
> > Forget datafab.c for this, as the protocoll is a little different.
>
>Hm. I used datafab.c successfully for the CF side.
>What precisely is different?
It's a while ago, but if I remember correctly, the ACOMdATA (actually
OnSpec Inc.) chip
has two short bulk data packets waiting to be read after a read/write, and
datafab.c only requested one,
which got the device quite confused after some time - and especially so
after media change.
Also datafab.c is useless for lun != 0 (for the ACOMdATA drive that is).
Note: reseting the ACOMdATA via the usb hub (usb_reset_device()) only work
for the CF/SM part, but not for the MS/SD.
Check older postings about other quirks.
Last Tuesday ("Queens Birthday" - a holiday in Holland)
I did the reading part, and this evening the writing part
for this animal. I see that you also did reading, more or
less in the same way, but you did not have writing code?
Let me document the present state of knowledge.
/*
* Commands: 8 bytes
* Five commands are known:
*
* Identify: 0 0 0 0 0 b0 0 80
*
* Read DeviceID: 0 0 0 0 0 b0 0 84
*
* Read: 0 P P P 0 b0 N 85
* here N is the number of 256-byte chunks,
* the high order bits of PPP are the PBA, the low order bits
* the sector within an erase block.
*
* Write: L1 P P P eN b0 L2 86
* here e is the bit "no evacuation needed" (bit 6), and
* N is the number of 512-byte sectors (bits 5-0),
* and PPP is as for Read, and L1,L2 are the low and high order
* parts of LBA.
*
* The write is not done at the indicated address, but elsewhere,
* and after the 2-byte OK status, four more bytes are returned
* to indicate where. The address PPP is big-endian, the returned
* address little-endian.
*
* Read map: 0 0 0 0 0 b0 L 8a
* here L is the number of 256-byte chunks.
* The map in 2 bytes (little endian) per block.
*
* (The CF part uses Identify: 00 01 00 00 00 a0 ec 01.)
*/
(more details in the code).
I changed quite a lot in the usb-storage directory, mostly
to avoid code duplication. If anyone is interested, the current
version lives on ftp.XX.kernel.org in kernel/people/aeb/usb-storage*wip
Unfortunately I cannot finish this second driver this evening, since
I destroyed my SmartMedia card. Wrote something bad to it, and this
reader doesnt want to look at it anymore.
Andries
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