USB error: all controllers failed lowlevel init

Hi,

This is because you don't have any devices inserted in your USB port.

Here is my log (on Starter Kit, running SDK8.0, U-Boot 2014.07-00107-gd28f2b9-dirty):
WITHOUT USB device inserted in the port:
U-Boot# usb start
(Re)start USB...
USB0: lowlevel init failed
USB error: all controllers failed lowlevel init

WITH USB device (flash drive) inserted in the USB PORT:
U-Boot# usb start
(Re)start USB...
USB0: scanning bus 0 for devices... 1 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found

Best Regards,
Yordan

Thank you for your reply, I am using am335x processor based custom board, in this i am connected usb flash disk connected through USB0(OTG port). then i got bellow error.

U-Boot# usb start
(Re)start USB...
USB0: lowlevel init failed
USB error: all controllers failed lowlevel init

Regards,
Naveen.

Hi Naveen,

Which u-boot are you using?

Best Regards,
Yordan

TI SDK7 Uboot

I just tested it on a Starter Kit and SDK 7 and it worked. It sounds like you might have something wrong in your USB on your custom board.

Steve K.

On your custom board, do you have usb1 as host? u-boot configures usb0 as client and usb1 as host.

Steve K.

p naveen kumar said:

in this i am connected usb flash disk connected through USB0(OTG port).

Uboot by default configures UBS0 port in device-only mode, and USB1 port in host-only mode. So 'usb start' command only checks USB1 port, not USB0 port.