[U-Boot] Patch to boot over USB cable on OMAP3EVM

Remy Bohmer linux at bohmer.net
Wed Jul 8 22:13:41 CEST 2009


Hello Brian,

2009/6/23 Brian Silverman <bsilverman at iveia.com>:
> I have created a patch for the OMAP3EVM u-boot to create an image for
> download into OMAP internal RAM (64k).  This allows a complete boot to
> Linux over USB only, without any RS-232 serial cables.  The difference
> between this and Nishanth Menon's procedures (found here:
> http://nishanthmenon.blogspot.com/2008/12/towards-creating-beagleboard-n
> and.html) is simply that the RS232 serial port is not required.
>
> If anybody has any input into this, or finds this useful, please
> share...

I can imagine it would be useful to someone.

> Here's an executive summary of the boot process:
>    - Setup OMAP3EVM to boot via USB
>    - Start Martin Mueller's omap3_usbload to download the u-boot.bin
> image
>    - Run a kermit script to talk to the board over /dev/ttyACM0, and
> download uImage/ramdisk images.
>    - bootm
>    - Linux boots to the command line.
>
> Also note: this builds off of a u-boot USB dev branch, not mainline
> u-boot.

To what version u-boot is it build exactly. This is not clear to me.
If you want this to be accepted in mainline, please post the patch
inline, and follow this procedure:
http://www.denx.de/wiki/U-Boot/Patches

Kind Regards,

Remy


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