On Wed, May 27, 2015 at 07:50:04PM +0800, Li Jun wrote:
> From: Macpaul Lin <[email protected]>
>
> Update usb_otg_descriptor for ADP/SRP/HNP features if usb HW has any
> configrations of them.
>
> Signed-off-by: Macpaul Lin <[email protected]>
> Signed-off-by: Li Jun <[email protected]>
> ---
> drivers/usb/gadget/composite.c | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
> index 4e3447b..707959c 100644
> --- a/drivers/usb/gadget/composite.c
> +++ b/drivers/usb/gadget/composite.c
> @@ -610,6 +610,36 @@ static void device_qual(struct usb_composite_dev *cdev)
> qual->bRESERVED = 0;
> }
>
> +static int usb_gadget_otg_desc_override(struct usb_gadget *gadget,
> + struct usb_configuration *config)
> +{
> + struct usb_otg_descriptor *otg_desc;
> +
> + if (!gadget_is_otg(gadget))
> + return -EOPNOTSUPP;
> +
> + otg_desc = (struct usb_otg_descriptor *)config->descriptors[0];
> +#ifdef CONFIG_USB_OTG_VERSION
> +#if CONFIG_USB_OTG_VERSION >= 20
> + otg_desc->bcdOTG = cpu_to_le16(((CONFIG_USB_OTG_VERSION / 10) << 8) +
> + (CONFIG_USB_OTG_VERSION % 10));
> +#endif
> +#endif
See my comments for the 1st patch
> + /* Override OTG attributes if defined by HW */
> + if (gadget->adp_support || gadget->hnp_support ||
> + gadget->srp_support) {
> + otg_desc->bmAttributes = 0;
> + if (gadget->adp_support)
> + otg_desc->bmAttributes |= USB_OTG_ADP;
> + if (gadget->hnp_support)
> + otg_desc->bmAttributes |= USB_OTG_HNP;
> + if (gadget->srp_support)
> + otg_desc->bmAttributes |= USB_OTG_SRP;
> + }
> +
> + return 0;
> +}
> +
> /*-------------------------------------------------------------------------*/
>
> static void reset_config(struct usb_composite_dev *cdev)
> @@ -837,6 +867,7 @@ int usb_add_config(struct usb_composite_dev *cdev,
> */
> usb_ep_autoconfig_reset(cdev->gadget);
>
> + usb_gadget_otg_desc_override(cdev->gadget, config);
> done:
> if (status)
> DBG(cdev, "added config '%s'/%u --> %d\n", config->label,
> --
> 1.9.1
>
--
Best Regards,
Peter Chen
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