The udc driver can notify the udc core that bus reset occurs by calling this utility, the core will notify gadget driver this information and update gadget state accordingly.
Signed-off-by: Peter Chen <[email protected]> --- drivers/usb/gadget/udc/udc-core.c | 17 +++++++++++++++++ include/linux/usb/gadget.h | 6 ++++++ 2 files changed, 23 insertions(+) diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c index b0d9817..ba661c6 100644 --- a/drivers/usb/gadget/udc/udc-core.c +++ b/drivers/usb/gadget/udc/udc-core.c @@ -124,6 +124,23 @@ EXPORT_SYMBOL_GPL(usb_gadget_set_state); /* ------------------------------------------------------------------------- */ /** + * usb_gadget_udc_reset - notifies the udc core that bus reset occurs + * @gadget: The gadget which bus reset occurs + * @driver: The gadget driver we want to notify + * + * If the udc driver has bus reset handler, it needs to call this when the bus + * reset occurs, it notifies the gadget driver that the bus reset occurs as + * well as updates gadget state. + */ +void usb_gadget_udc_reset(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + driver->reset(gadget); + usb_gadget_set_state(gadget, USB_STATE_DEFAULT); +} +EXPORT_SYMBOL_GPL(usb_gadget_udc_reset); + +/** * usb_gadget_udc_start - tells usb device controller to start up * @gadget: The gadget we want to get started * @driver: The driver we want to bind to @gadget diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 598a6e9..d188114 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -1017,6 +1017,12 @@ extern void usb_gadget_set_state(struct usb_gadget *gadget, /*-------------------------------------------------------------------------*/ +/* utility to tell udc core that the bus reset occurs */ +extern void usb_gadget_udc_reset(struct usb_gadget *gadget, + struct usb_gadget_driver *driver); + +/*-------------------------------------------------------------------------*/ + /* utility wrapping a simple endpoint selection policy */ extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *, -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
