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authorStefan Brüns <stefan.bruens@rwth-aachen.de>2016-01-17 04:09:56 +0100
committerMarek Vasut <marex@denx.de>2016-01-23 16:21:11 +0100
commitd2ff51b372a6800fcf1394fc2ca9821d86b15335 (patch)
treed7524ea5df1b698bb0f548c00a88437c18780e73 /board/siemens
parentb54e44705258c0443310ed12b8982707d7992fa8 (diff)
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usb: dwc2: Add SPLIT INTERRUPT transaction support
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: Stefan Brüns <stefan.bruens@rwth-aachen.de>
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