Jetson TK1 boot USB 3.0 Flash driver with "USB 3.0 Enable"

chenac · October 11, 2014, 12:08am

Without enable USB 3.0, I could boot L4T_R19.3.0 from USB Flash Drive.

But If I enable USB 3.0 by

set ODMDATA=0x6209C000 in jetson-tk1.conf
sudo ./apply_binaries.sh
put Jetson-TK1 into Recovery Mode and sudo ./flash.sh jetson-tk1 sda1
cd rootfs, sudo cp -a * /media/user/usb_flash_driver, sync, put USB drive into Jetson-TK1.

I could not boot from USB Flash Drive, the serial console last message is “Waiting for root device /dev/sda1…”

Is this a known bug ?

chenac · October 17, 2014, 1:28am

Finally I see the answer …

chuang · October 17, 2014, 8:43pm

Ya. USB 3.0 (aka XUSB) requires firmware to be uploaded to the controller. In the L4T image, the firmware resides in the root file system and is loaded by the kernel depending upon the ODMdata settings provided when flashing (which cause additional kernel command line parameters to be passed). For this use case, create an initial ramdisk to provide the XUSB firmware, and flash that to eMMC along with the kernel.

chenac · October 21, 2014, 12:26am

Thanks chuang , I appreciate your detailed explanation.