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>
diff --git a/drivers/usb/host/dwc2.h b/drivers/usb/host/dwc2.h
index f69372e..594757b 100644
--- a/drivers/usb/host/dwc2.h
+++ b/drivers/usb/host/dwc2.h
@@ -500,6 +500,7 @@
#define DWC2_HFNUM_FRNUM_OFFSET 0
#define DWC2_HFNUM_FRREM_MASK (0xFFFF << 16)
#define DWC2_HFNUM_FRREM_OFFSET 16
+#define DWC2_HFNUM_MAX_FRNUM 0x3FFF
#define DWC2_HPTXSTS_PTXFSPCAVAIL_MASK (0xFFFF << 0)
#define DWC2_HPTXSTS_PTXFSPCAVAIL_OFFSET 0
#define DWC2_HPTXSTS_PTXQSPCAVAIL_MASK (0xFF << 16)