• Felipe Balbi's avatar
    usb: Introduce DesignWare USB3 DRD Driver · 72246da4
    Felipe Balbi authored
    The DesignWare USB3 is a highly
    configurable IP Core which can be
    instantiated as Dual-Role Device (DRD),
    Peripheral Only and Host Only (XHCI)
    configurations.
    
    Several other parameters can be configured
    like amount of FIFO space, amount of TX and
    RX endpoints, amount of Host Interrupters,
    etc.
    
    The current driver has been validated with
    a virtual model of version 1.73a of that core
    and with an FPGA burned with version 1.83a
    of the DRD core. We have support for PCIe
    bus, which is used on FPGA prototyping, and
    for the OMAP5, more adaptation (or glue)
    layers can be easily added and the driver
    is half prepared to handle any possible
    configuration the HW engineer has chosen
    considering we have the information on
    one of the GHWPARAMS registers to do
    runtime checking of certain features.
    
    More runtime checks can, and should, be added
    in order to make this driver even more flexible
    with regards to number of endpoints, FIFO sizes,
    transfer types, etc.
    
    While this supports only the device side, for
    now, we will add support for Host side (xHCI -
    see the updated series Sebastian has sent [1])
    and OTG after we have it all stabilized.
    
    [1] http://marc.info/?l=linux-usb&m=131341992020339&w=2Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    72246da4
debugfs.c 14.7 KB