[linuxdc-dev] Fwd: "Phase" and VMU flash access

[Adrian M. <ad...@mc...>]

----------  Forwarded Message  ----------

Subject: "Phase" and VMU flash access
Date: Sun, 18 Aug 2002 18:27:00 +0100
From: Adrian McMenamin <ad...@mc...>
To: lin...@li...
Cc: dc...@ya...;

Apologies for the cross posting - this is a question about a linux driver I
 am attempting to write, but people on the dcdev list may have a better idea
 of the answer!

I am trying to build on the work of Paul Mundt (Lethal), who started a vmu
flash driver for linux. I am making some progress, but now have a question
about how the maple bus interfaces to the VMU.

On Marcus Comstedt's site, the great man has written this about the block
 read command (command number/name, format, expected return):

11 Block read       func, (pt<<24)|(phase<<16)|block            8


He then writes this about "phase":

phase
Sequence number for piecewise block access


What does this mean? Is it the number of the particular byte being acessed
inside the 512 byte vmu flash block, or something different?

Is it possible to access byte by byte, or does mplae bus just return the 512
byte block?

Anybody got any hints or existing working code I could look at?

Thanks

Adrian

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