• Stefan Brüns's avatar
    usb: dwc2: Add SPLIT INTERRUPT transaction support · d2ff51b3
    Stefan Brüns authored
    
    
    CSPLITs for INTERRUPT transactions have to be scheduled in each microframe
    following the SSPLIT. INTERRUPT transfers are executed in the next even/
    odd microframe depending on the HCCHAR_ODDFRM flag.
    
    As there are no handshakes for INTERRUPT SSPLITs the SSPLIT may have
    failed (transport error) without the error being detected by the host
    driver. If the last CSPLIT is not received within 4 microframes after the
    SSPLIT there was a transaction error and the complete transaction has
    to be restarted.
    Signed-off-by: default avatarStefan Brüns <stefan.bruens@rwth-aachen.de>
    d2ff51b3
dwc2.c 31.1 KB