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https://github.com/brain-hackers/u-boot-brain
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![]() The ifdef'ed Linux kernel code uses the 1 based port number, whereas U-Boot puts a 0 based port number into the register. The reason the 0 based port number apparently works can probably be taken from the USB 2.0 spec: 8.4.2.2 Start-Split Transaction Token ... The host must correctly set the port field for single and multiple TT hub implementations. A single TT hub implementation *may ignore* the port field. Actually, as far as I understand, a multi TT hub defaults to single TT (bAlternateSetting: 0) until switched via SetInterface, so even "port 42" would work. The change was verified by hardcoding the port number to a wrong value, SPLIT transactions kept working (although using a DWC2 instead of MUSB). Tested hubs are the RPi onboard SMC9514 and an external "05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB". The former is a multi TT hub, the latter single TT only. Addendum: Tested on sunxi/MUSB by Hans de Goede Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Hans de Goede <hdegoede@redhat.com> |
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.. | ||
am35x.c | ||
Kconfig | ||
linux-compat.h | ||
Makefile | ||
musb_core.c | ||
musb_core.h | ||
musb_debug.h | ||
musb_dma.h | ||
musb_dsps.c | ||
musb_gadget_ep0.c | ||
musb_gadget.c | ||
musb_gadget.h | ||
musb_host.c | ||
musb_host.h | ||
musb_io.h | ||
musb_regs.h | ||
musb_uboot.c | ||
musb_uboot.h | ||
omap2430.c | ||
omap2430.h | ||
sunxi.c | ||
usb-compat.h |