zhao, forrest wrote:
On Wed, 2006-07-26 at 11:14 -0400, Mark Lord wrote:
zhao, forrest wrote:
Hello, all
In ACPI spec 3.0, section 9.9 defines 4 objects for PATA/SATA:
_GTF is for both PATA and SATA, which is used to return ATA task file
needed to re-init the drive;
_SDD is SATA-only object, which is used to inform the platform of the
type of device attached to a port;
_GTM and _STM are PATA-only objects, which are used to get/set PATA
timing information(i.e. PIO and DMA speed).
It seems to be quite common for ICH*M notebooks to use the SATA ports
to attach PATA drives with PATA->SATA bridge chips in the middle.
In this case, one would expect the _GTM and _STM objects to be necessary,
even though Linux thinks it's a SATA situation.
Hi Mark,
I re-read the section 9.9 of ACPI spec 3.0, but didn't find any
description about how to deal with "PATA->SATA bridge". Is this version
of APCI spec outdated?
Would you please point me to spec(or document), which has the
description of how to deal with "PATA->SATA bridge"?
I don't have any documents, just machines that implement it.
Cheers
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