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

[Eric Bénard]

Hi Maxime,

Le Thu, 20 Nov 2014 17:49:17 +0100,
Maxime Ripard <maxime.ripard at free-electrons.com> a écrit :

> 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
> 
> The device itself being a USB key, it's somewhat odd that it
> enumerates the device, but doesn't find the storage device...
> 
> The same USB port with the same device works fine under Linux.
> 
> The VBUS pin is still up after running the command, so it's not really
> a matter of power being shut down on the bus.
> 
> I'm kind of running out of idea on what to test next. The differences
> between u-boot's musb-new and Linux' own musb driver seems thin and to
> make sense, so I don't think the driver itself is to blame.
> 
> Anyone experienced such a thing?
> 
what is the log you get when you run "usb start" and the USB device is
not plugged ?

Eric