Hello,
I am the owner of a Dell Latitude D620 notebook with an ICH7 SATA
controller, unfortunately, the BIOS does not offer the option of using
"native mode" instead of "compatibility mode" when it comes to SATA. For
now, the ata_piix runs happily in compatibility mode. Looking at the
ICH7 docs, I found that poking register 0x90 in PCI configuration space
with value 0x40 should enable AHCI. However, there are some issues with
poking that register with setpci in an early initramfs:
- The kernel does not seem to update the device id from PCI config
space, which changes with the controller mode (it would seem the PCI
subsystem keeps a copy)
- Poking PCI registers from userspace is far from ideal
It would be great if the AHCI driver (or otherwise) had a
"force_ich7_ahci" to properly setup and initialize this device in full
"native" AHCI mode. This option would be greatly welcome from users like
me who have a stupid bios (eh, who doesn't).
Thank you,
Jonathan
-
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
