[U-Boot] [PATCH] usb: ci_udc: fix interaction with CONFIG_USB_ETH_CDC

["Jörg Krause" <jkrause@posteo.de>]

On 06/28/2014 10:53 PM, J?rg Krause wrote:
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I did some tests this weekend on u-boot-usb/master branch.

If I run "env default -a" and then "saveenv" after a reset, I get the 
same error as running three time "tftp file" in a row.
Log:

    U-Boot 2014.07-rc3-g18e0313-dirty (Jun 29 2014 - 21:56:02)

    CPU:   Freescale i.MX28 rev1.2 at 454 MHz
    BOOT:  NAND, 3V3
    DRAM:  64 MiB
    NAND:  128 MiB
    In:    serial
    Out:   serial
    Err:   serial
    Net:   usb_ether [PRIME]
    Hit any key to stop autoboot:  0
    => env default -a
    ## Resetting to default environment
    => saveenv
    Saving Environment to NAND...
    Erasing NAND...
    Erasing at 0x360000 -- 100% complete.
    Writing to NAND... OK
    => tftp rootfs.ubifs
    using ci_udc, OUT ep- IN ep- STATUS ep-
    MAC 00:19:b8:00:00:02
    HOST MAC 00:19:b8:00:00:01
    high speed config #1: 2 mA, Ethernet Gadget, using CDC Ethernet
    ERROR: The remote end did not respond in time.
    at drivers/usb/gadget/ether.c:2388/usb_eth_init()

"env default -a" removes stdin, stdout, stderr, and ver from the output 
of "printenv".

Looking at drivers/usb/gadget/ether.c:usb_eth_init I found the 
environment variable "cdc_connect_timeout". I played a little bit with 
the settings.

1) Using "setenv cdc_connect_timeout 1" from the command line: tftp runs 
more then three time in a row. Actually I can run tftp more than ten 
times in row and it produces no error. I tested the values 1, 3, and 15 
for cdc_connect_timeout.

2) Setting #define CONFIG_EXTRA_ENV_SETTINGS "cdc_connect_timeout=1\0" \ 
in my config header file. This does not help and produces the error on 
the fourth run of tfpd. Tested with values 1 and 3 for timeout.

Very, very strange.