tree fb4143ad12f506aa82d3c6e39cec790414d902f1
parent 0df0d0a0ea9ffcee4e56f96cd9d9e32b0644eb21
author Tejun Heo <htejun@gmail.com> 1163052520 +0900
committer Jeff Garzik <jeff@garzik.org> 1165031093 -0500

[PATCH] ahci: honor PORTS_IMPL on ICH8s

Some ICH8s use non-linear port mapping.  ahci driver didn't use to
honor PORTS_IMPL and this made ports after hole nonfunctional.  This
patch makes ahci mark those ports as dummy and properly initialize all
the implemented ports after the dummies.

As it's unknown whether other AHCIs implement PORTS_IMPL register
properly, new board id board_ahci_pi is added and selectively applied
to ICH8s.  All other AHCIs continue to use linear mapping regardless
of PORTS_IMPL value.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Robin H. Johnson <robbat2@gentoo.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>