diff options
| -rw-r--r-- | drivers/usb/dwc3/core.h | 1 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 8 | ||||
| -rw-r--r-- | include/linux/usb/gadget.h | 15 |
3 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index f2006c0c26bc..6886b14c8dd8 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -716,6 +716,7 @@ struct dwc3_scratchpad_array { #define DWC3_CORE_PM_RESUME_EVENT 4 #define DWC3_CONTROLLER_CONNDONE_EVENT 5 #define DWC3_CONTROLLER_NOTIFY_OTG_EVENT 6 +#define DWC3_CONTROLLER_RESTART_USB_SESSION 10 #define MAX_INTR_STATS 10 /** diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index b63e9c0ab305..377282fc486c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2025,6 +2025,13 @@ static int dwc3_gadget_stop(struct usb_gadget *g) return 0; } +static int dwc3_gadget_restart_usb_session(struct usb_gadget *g) +{ + struct dwc3 *dwc = gadget_to_dwc(g); + + return dwc3_notify_event(dwc, DWC3_CONTROLLER_RESTART_USB_SESSION); +} + static const struct usb_gadget_ops dwc3_gadget_ops = { .get_frame = dwc3_gadget_get_frame, .wakeup = dwc3_gadget_wakeup, @@ -2033,6 +2040,7 @@ static const struct usb_gadget_ops dwc3_gadget_ops = { .pullup = dwc3_gadget_pullup, .udc_start = dwc3_gadget_start, .udc_stop = dwc3_gadget_stop, + .restart = dwc3_gadget_restart_usb_session, }; /* -------------------------------------------------------------------------- */ diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 7c18c70df503..3f572d5dc16d 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -649,6 +649,7 @@ struct usb_gadget_ops { int (*vbus_session) (struct usb_gadget *, int is_active); int (*vbus_draw) (struct usb_gadget *, unsigned mA); int (*pullup) (struct usb_gadget *, int is_on); + int (*restart)(struct usb_gadget *); int (*ioctl)(struct usb_gadget *, unsigned code, unsigned long param); void (*get_config_params)(struct usb_dcd_config_params *); @@ -1049,6 +1050,20 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget) } /** + * usb_gadget_restart - software-controlled reset of USB peripheral connection + * @gadget:the peripheral being reset + * + * Informs controller driver for Vbus LOW followed by Vbus HIGH notification. + * This performs full hardware reset and re-initialization. + */ +static inline int usb_gadget_restart(struct usb_gadget *gadget) +{ + if (!gadget->ops->restart) + return -EOPNOTSUPP; + return gadget->ops->restart(gadget); +} + +/** * usb_gadget_deactivate - deactivate function which is not ready to work * @gadget: the peripheral being deactivated * |