• Bernd Porr's avatar
    usbdux: usbduxsigma: added soft interval mode in the firmware · 22e3407b
    Bernd Porr authored
    urb->interval is ignored in xhci drivers. Instead, the firmware
    has an interval counter and transmits data at this interval.
    The uframes in-between are zero length packets. In order to be
    backward compatible with older kernels which support only USB 2.0
    and 1.1 there are two ADC modes in the firmware. The old one which
    assumes that the interval is established by the host (urb->interval)
    and the new one where the interval value is transmitted to the
    firmware.
    Signed-off-by: default avatarBernd Porr <mail@berndporr.me.uk>
    Signed-off-by: default avatarKyle McMartin <kyle@kernel.org>
    22e3407b
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