[U-Boot] [PATCH 0/6] usb: dwc2: add SPLIT transaction support

[Stefan Brüns]

First two patches are preparatory work. 3rd and 4th introduce helper
functions. Patch 5 contains the core changes. Patch 6 is cleanup.

The patch has been tested on RPi 1 B with several full speed and low speed
devices. All devices enumerated successfully, with good output from
"usb info". High speed devices, e.g. the SMSC9514 ethernet and mass storage
devices still work.

Neither CONFIG_DM_USB nor LS/FS devices directly connected to the root hub/hc
have been tested, although both should be handled by the patches.

Stefan Brüns (6):
  usb: dwc2: avoid out of bounds access
  usb: dwc2: Handle NAK during CONTROL DATA and STATUS stage
  usb: dwc2: determine TT hub address and port for split transactions
  usb: dwc2: add helper function for setting SPLIT HC registers
  usb: dwc2: add support for SPLIT transactions
  usb: dwc2: remove no longer used wait_for_chhltd()

 drivers/usb/host/dwc2.c | 240 +++++++++++++++++++++++++++++++++++-------------
 1 file changed, 178 insertions(+), 62 deletions(-)

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2.1.4