3  * drd.c - DesignWare USB2 DRD Controller Dual-role support
13 #include <linux/usb/role.h>
86 static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role)  in dwc2_drd_role_sw_set()  argument
93 	if ((role == USB_ROLE_DEVICE && hsotg->dr_mode == USB_DR_MODE_HOST) ||  in dwc2_drd_role_sw_set()
94 	    (role == USB_ROLE_HOST && hsotg->dr_mode == USB_DR_MODE_PERIPHERAL))  in dwc2_drd_role_sw_set()
100 	if (role == USB_ROLE_NONE && hsotg->test_mode) {  in dwc2_drd_role_sw_set()
109 	 * If role-switch set is called before the udc_start, we need to enable  in dwc2_drd_role_sw_set()
122 	if (role == USB_ROLE_NONE) {  in dwc2_drd_role_sw_set()
123 		/* default operation mode when usb role is USB_ROLE_NONE */  in dwc2_drd_role_sw_set()
125 			role = USB_ROLE_HOST;  in dwc2_drd_role_sw_set()
127 			role = USB_ROLE_DEVICE;  in dwc2_drd_role_sw_set()
139 	if (role == USB_ROLE_HOST) {  in dwc2_drd_role_sw_set()
141 	} else if (role == USB_ROLE_DEVICE) {  in dwc2_drd_role_sw_set()
161 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_role_sw_set()
167 		role == USB_ROLE_NONE ? "No" :  in dwc2_drd_role_sw_set()
168 		role == USB_ROLE_HOST ? "A" : "B");  in dwc2_drd_role_sw_set()
179 	if (!device_property_read_bool(hsotg->dev, "usb-role-switch"))  in dwc2_drd_init()
192 			"failed to register role switch: %d\n", ret);  in dwc2_drd_init()
220 	enum usb_role role;  in dwc2_drd_resume()  local
223 		/* get last known role (as the get ops isn't implemented by this driver) */  in dwc2_drd_resume()
224 		role = usb_role_switch_get_role(hsotg->role_sw);  in dwc2_drd_resume()
226 		if (role == USB_ROLE_NONE) {  in dwc2_drd_resume()
228 				role = USB_ROLE_HOST;  in dwc2_drd_resume()
230 				role = USB_ROLE_DEVICE;  in dwc2_drd_resume()
233 		/* restore last role that may have been lost */  in dwc2_drd_resume()
234 		if (role == USB_ROLE_HOST)  in dwc2_drd_resume()
236 		else if (role == USB_ROLE_DEVICE)  in dwc2_drd_resume()
239 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_resume()
242 			role == USB_ROLE_NONE ? "No" :  in dwc2_drd_resume()
243 			role == USB_ROLE_HOST ? "A" : "B");  in dwc2_drd_resume()