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authorRemy Bohmer <linux@bohmer.net>2008-09-16 14:55:44 +0200
committerMarkus Klotzbuecher <mk@denx.de>2008-09-17 15:41:21 +0200
commitc9e8436b10cca53fca4904ecbadcd6231ad72c38 (patch)
tree82c0b1610d3cd0057c65ac3a2a0bdbfa7b0a5cfa /include/miiphy.h
parent6f5794a6f78b313231256958fd73673c6aacc116 (diff)
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USB layer of U-Boot causes USB protocol errors while using USB memory sticks
There are several differences between Linux, Windows and U-boot for initialising the USB devices. While analysing the behaviour of U-boot it turned out that U-boot does things really different, and some are wrong (compared to the USB standard). This patch fixes some errors: * The NEW_init procedure that was already in the code is good, while the old procedure is wrong. See code comments for more info. * On a Control request the data returned by the device can be more than 8 bytes, while the host limits it to 8 bytes. This caused the host to generate a DataOverrun error. This results in a lot of USB sticks not being recognised, and the transmission ended frequently with a CTL:TIMEOUT Error. * Added a flag CONFIG_LEGACY_USB_INIT_SEQ to allow users to use the old init procedure. Signed-off-by: Remy Bohmer <linux@bohmer.net> Signed-off-by: Markus Klotzbuecher <mk@denx.de>
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