[U-Boot] [PATCH] usb: dwc2: Init desc_before_addr

[Dinh Nguyen]

On 04/25/2016 08:08 PM, Marek Vasut wrote:
> Initialize desc_before_addr, otherwise the USB core won't send the
> first 64B Get Device Descriptor request in common/usb.c function
> usb_setup_descriptor() . There are some USB devices which expect
> this sequence and otherwise can misbehave.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Dinh Nguyen <dinguyen at opensource.altera.com>
> Cc: Tom Rini <trini at konsulko.com>
> ---
>  drivers/usb/host/dwc2.c | 3 +++
>  1 file changed, 3 insertions(+)
> ---
> NOTE: I checked this with TotalPhase Beagle USB480 and it does what it is
>       supposed to do now. It would be wonderful to get this into rc3.
> 
> diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
> index b2f4bc6..559c43f 100644
> --- a/drivers/usb/host/dwc2.c
> +++ b/drivers/usb/host/dwc2.c
> @@ -1182,6 +1182,9 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
>  static int dwc2_usb_probe(struct udevice *dev)
>  {
>  	struct dwc2_priv *priv = dev_get_priv(dev);
> +	struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
> +
> +	bus_priv->desc_before_addr = true;
>  
>  	return dwc2_init_common(priv);
>  }
> 

With this patch, I no longer have to revert commit "c998da0d67091 usb:
Change power-on / scanning timeout handling" for my problematic Kingston
USB stick to work.

So feel free to add:

Tested-by: Dinh Nguyen <dinguyen at opensource.altera.com>

Dinh