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

[Marek Vasut]

On 04/26/2016 03:08 AM, 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.

Oh, before anyone asks if this fixes USB problem on SoCFPGA, no, it does
not. There is more weird stuff to go, I have certain hypothesis,
but let's see.

> 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);
>  }
> 


-- 
Best regards,
Marek Vasut