Re: [PATCH 0/2]ACPI support for SATA/PATA

[Mark Lord <liml@rtr.ca>]

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 of APCI spec outdated?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