On 09/07/15 10:18, Li Jun wrote:
> Allocate and initialize usb otg descriptor according to gadget otg
> capabilities, add it for each usb configurations. If otg capability
> is not defined, keep its original otg descriptor unchanged.
>
> Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
Reviewed-by: Roger Quadros <rogerq@xxxxxx>
cheers,
-roger
> ---
> drivers/usb/gadget/legacy/serial.c | 37 +++++++++++++++++++++----------------
> 1 file changed, 21 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/usb/gadget/legacy/serial.c b/drivers/usb/gadget/legacy/serial.c
> index 8b7528f..9836d16 100644
> --- a/drivers/usb/gadget/legacy/serial.c
> +++ b/drivers/usb/gadget/legacy/serial.c
> @@ -79,20 +79,7 @@ static struct usb_device_descriptor device_desc = {
> .bNumConfigurations = 1,
> };
>
> -static struct usb_otg_descriptor otg_descriptor = {
> - .bLength = sizeof otg_descriptor,
> - .bDescriptorType = USB_DT_OTG,
> -
> - /* REVISIT SRP-only hardware is possible, although
> - * it would not be called "OTG" ...
> - */
> - .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
> -};
> -
> -static const struct usb_descriptor_header *otg_desc[] = {
> - (struct usb_descriptor_header *) &otg_descriptor,
> - NULL,
> -};
> +static const struct usb_descriptor_header *otg_desc[2];
>
> /*-------------------------------------------------------------------------*/
>
> @@ -191,6 +178,18 @@ static int gs_bind(struct usb_composite_dev *cdev)
> serial_config_driver.iConfiguration = status;
>
> if (gadget_is_otg(cdev->gadget)) {
> + if (!otg_desc[0]) {
> + struct usb_descriptor_header *usb_desc;
> +
> + usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
> + if (!usb_desc) {
> + status = -ENOMEM;
> + goto fail;
> + }
> + usb_otg_descriptor_init(cdev->gadget, usb_desc);
> + otg_desc[0] = usb_desc;
> + otg_desc[1] = NULL;
> + }
> serial_config_driver.descriptors = otg_desc;
> serial_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
> }
> @@ -208,13 +207,15 @@ static int gs_bind(struct usb_composite_dev *cdev)
> "gser");
> }
> if (status < 0)
> - goto fail;
> + goto fail1;
>
> usb_composite_overwrite_options(cdev, &coverwrite);
> INFO(cdev, "%s\n", GS_VERSION_NAME);
>
> return 0;
> -
> +fail1:
> + kfree(otg_desc[0]);
> + otg_desc[0] = NULL;
> fail:
> return status;
> }
> @@ -227,6 +228,10 @@ static int gs_unbind(struct usb_composite_dev *cdev)
> usb_put_function(f_serial[i]);
> usb_put_function_instance(fi_serial[i]);
> }
> +
> + kfree(otg_desc[0]);
> + otg_desc[0] = NULL;
> +
> return 0;
> }
>
>
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