Re: SII 3512 SATA Progress but help still needed

[Jeff Garzik <jgarzik@pobox.com>]

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