• Tejun Heo's avatar
    pata_amd: update mode selection for NV PATAs · ce54d161
    Tejun Heo authored
    Cable detection on NV PATA hosts isn't implemented and the CBLID-
    cable isn't wired according to the sepc either, so both host-side and
    generic drive-side cable detections are broken.  Till now,
    nv_cable_detect() relied on peeking BIOS and ACPI configurations to
    upgrade to 80C but this often results in misdetection of 40C cable as
    80C.  Also, the original implementation was broken in that by the time
    BIOS configuration is read it has already been cleared by programming
    PIO0 during reset.
    
    This patch reimplements NV mode selection such that...
    
    * BIOS configuration value is stored during driver attach and restored
      on detach.
    
    * Cable type is fixed to ATA_CBL_PATA_IGN and mode selection is soley
      done by nv_mode_filter() which peeks both BIOS and ACPI
      configurations and filter accordingly.
    Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
    Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    ce54d161
pata_amd.c 20.5 KB