Hi!
My question is:
Do amd's chipset have most of via's ide registers but they are simply
not documented in datasheet? Can somebody with AMD-756 verify this, or
just send me his proc info about registers (usually /proc/bus/pci/00/?).
Ok, it was my question. Here goes full story:
I have been recently playing with IDE subsystem (2.4.0-test1-ac2),
and I noticed that drivers/ide/amd7409.c is very similar (almost
identical) to drivers/ide/via82cxxx.c. So I quickly grabbed "AMD-756 Periphal
Bus Controller Data Sheet" (22548.pdf) and compared parts describing IDE
to VIA 596B and VIA 686A datasheets. My conclusion is that amd7409.c can
be merged into via82cxxx.c (if answer on my question is "yes").
Registers comparison:
* 0x40, 0x41, 0x48-0x4b, 0x4c, 0x4e, 0x4f are _exactly_ the same
* 0x50-0x53 are very similar and can be throw into another via82cxxx_table
* 0x43, 0x44, 0x46, 0x60, 0x68 and few others (not used in via82cxxx.c)
are only described in via datasheets, but I suspect that most of them
are implemented in amd's chipset and not documented in data sheet.
1word_dma bug of amd's chipset (read 22591.pdf):
* it is fixed in revison D4, but is not supported by amd7409.c
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