[U-Boot] USB Host not enumerating properly on AM335x-based board

Maxime Ripard
2014-12-10T15:23:49Z

Hi,

On Thu, Nov 20, 2014 at 05:49:17PM +0100, Maxime Ripard wrote:
> Hi,
>
> I'm currently working on 2014.07, on a custom TI AM335x based board.
>
> Everything works great so far, except when we're trying to have USB
> host working.
>
> The board has the MUSB1 controller wired as USB Host only, with the
> following configuration:
>
> #define CONFIG_USB_MUSB_DSPS
> #define CONFIG_ARCH_MISC_INIT
> #define CONFIG_MUSB_PIO_ONLY
> #define CONFIG_MUSB_DISABLE_BULK_COMBINE_SPLIT
> #define CONFIG_MUSB_HOST
> #define CONFIG_MUSB_DSPS
> #define CONFIG_AM335X_USB1
> #define CONFIG_AM335X_USB1_MODE MUSB_HOST
>
> #ifdef CONFIG_MUSB_HOST
> #define CONFIG_CMD_USB
> #define CONFIG_USB_STORAGE
> #define CONFIG_USB_HOST_ETHER
> #define CONFIG_USB_ETHER_ASIX
> #endif
>
> Whenever we try to scan the USB controller and that a device is
> attached, we get the following output:
>
> U-Boot# usb start
> (Re)start USB...
> USB0: scanning bus 0 for devices... 1 USB Device(s) found
> scanning usb for storage devices... 0 Storage Device(s) found
> scanning usb for ethernet devices... 0 Ethernet Device(s) found

Just an update on this one.

Our configuration was missing CONFIG_USB_GADGET_DUALSPEED that, even
though its name suggest otherwise, seems to be needed to enable USB2.0
devices support in the musb-new driver.

With this additional configuration option, everything works as
expected.

Thanks!
Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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