linux-sunxi
usb_bulk_send() ERROR -7: Operation timed out on Raspberry PI 3 B+
When trying to boot from FEL mode on a perfectly working setup (cable and board) from a Raspberry PI 3B+ board, timeout happen:
pi@raspberrypi:~/sunxi-tools-1 $ ./sunxi-fel ver
AWUSBFEX soc=00001667(A33) 00000001 ver=0001 44 08 scratchpad=00007e00 00000000 00000000
pi@raspberrypi:~/sunxi-tools-1 $ ./sunxi-fel -v uboot u-boot-sunxi-with-spl.bin
Stack pointers: sp_irq=0x00002000, sp=0x00005E08
MMU is not enabled by BROM
=> Executing the SPL... done.
Writing image "U-Boot 2018.05 for sunxi board", 549287 bytes @ 0x4A000000.
usb_bulk_send() ERROR -7: Operation timed out
According to this thread, the issue may be related to the maximum transfert block size. Indeed changing from 512kib to 128kib fixes the issue.
pi@raspberrypi:~/sunxi-tools-1 $ ./sunxi-fel -v uboot u-boot-sunxi-with-spl.bin
Stack pointers: sp_irq=0x00002000, sp=0x00005E08
MMU is not enabled by BROM
=> Executing the SPL... done.
Writing image "U-Boot 2018.05 for sunxi board", 549287 bytes @ 0x4A000000.
Starting U-Boot (0x4A000000).
pi@raspberrypi:~/sunxi-tools-1 $
Though you use apt source to install sunxi-tools, you will get error which tell you "usb_bulk_send() ERROR -7: Operation timed out". You should git clone sunxi-tools and build it from source code, you will solve this problem.
The same story, increased the timeout, reduced the size from 512kb to 128kb, nothing helps, both the version with apt (v1.4.2) and the master branch (v1.4.2-178-gdf60a46-dirty) do not work. Any suggestions?
