Re: SII 3512 SATA Progress but help still needed

[Aron Rubin <arubin@atl.lmco.com>]

Thank you, I did not have a chance to look at this yet but I will soon.
Interresting that this lost interrupt message seems to apply in more
cases with the siimage driver. Is it related to differences in the
architecture (64bit)? I thought it was merely something about dealing
with the new chipset. Silicon Image has not replied to my email yet but
I am not sure the 3512 is different from the 3112 other than the design
for the AMD64 Gigabyte mobo.

Aron

Jeff Garzik wrote:
> Bartlomiej Zolnierkiewicz wrote:
> 
>> I don't know. ;-)
>>
>> I have only one idea right now - look what drivers/scsi/libata.c
>> does for SATA controllers during init and what drivers/ide/ doesn't.
>>
>> I am talking about sata_phy_reset() in libata.c.
> 
> 
> libata-core.c :)
> 
> Basically for Silicon Image:
> * use SATA "SCR" (status and control register) to bring device out of 
> any low-power state it may be in
> * use SATA SCR to reset SATA bus
> * do _not_ issue ATA software reset or E.D.D. (90h), as the desired 
> signature is already in the ATA command block registers
> * look at the signature, decide ATA or ATAPI
> * issue IDENTIFY [PACKET] DEVICE
> * issue SET FEATURES (XFER)
> 
> That's the ATA_FLAG_SATA_RESET code path.  If the driver has the flag 
> ATA_FLAG_SRST, then the first few steps change to:
> * issue ATA software reset, by flipping SRST bit in Device Control
> * look at signature[...]
> 
> I'm pretty sure drivers/ide/pci/siimage.c already does the 
> bring-it-out-of-low-power thing, twiddling the SCRs.
> 
> (the SCRs are documented in the public SATA spec on www.serialata.org)
> 
> In addition, drivers/ide/pci/siimage.c actually does initialize the 
> hardware a bit more fully than my SII driver does, IIRC...
> 
>     Jeff
> 
> 
> 


-- 

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Aron Rubin                       Member, Engineering Staff
Lockheed Martin                  E-Mail: arubin@atl.lmco.com
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