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ALSA: dice: document quadlet alignment

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Doing accesses without quadlet alignment is a bad idea because the
firmware's byte-swapping would garble the data; clarify this in the
documentation.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2012-01-08 22:18:00 +01:00
parent c614475b0e
commit 61b8cf0222
1 changed files with 3 additions and 3 deletions
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6
sound/firewire/dice-interface.h
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@ -7,9 +7,9 @@
/*
* Generally, all registers can be read like memory, i.e., with quadlet read or
* block read transactions with any alignment or length. Writes are not
* allowed except where noted; quadlet-sized registers must be written with
* a quadlet write transaction.
* block read transactions with at least quadlet-aligned offset and length.
* Writes are not allowed except where noted; quadlet-sized registers must be
* written with a quadlet write transaction.
*
* All values are in big endian. The DICE firmware runs on a little-endian CPU
* and just byte-swaps _all_ quadlets on the bus, so values without endianness