• Mark Nelson's avatar
    ahci: Add support for Promise PDC42819 · c77a036b
    Mark Nelson authored
    Add an appropriate entry for the Promise PDC42819 controller. It has an
    AHCI mode and so far works correctly with board_ahci.
    
    This chip is found on Promise's FastTrak TX2650 (2 port) and TX4650 (4 port)
    software-based RAID cards (for which there is a binary driver, t3sas) and
    can be found on some motherboards, for example the MSI K9A2 Platinum,
    which calls the chip a Promise T3 controller.
    
    Although this controller also supports SAS devices, its default bootup mode
    is AHCI and the binary driver has to do some magic to get the chip into the
    appropriate mode to drive SAS disks.
    
    Seeing as no documentation is provided by Promise, adding this entry to the
    ahci driver allows the controller to be useful to people as a SATA
    controller (with no ill effects on the system if a SAS disk is connected -
    probing of the port just times out with "link online but device
    misclassified"), without having to resort to using the binary driver. Users
    who require SAS or the proprietary software raid can get this functionality
    using the binary driver.
    Signed-off-by: default avatarMark Nelson <mdnelson8@gmail.com>
    Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
    c77a036b
ahci.c 74.3 KB