3  * drd.c - DesignWare USB2 DRD Controller Dual-role support
13 #include <linux/usb/role.h>
85 static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role)  in dwc2_drd_role_sw_set()  argument
92 	if ((role == USB_ROLE_DEVICE && hsotg->dr_mode == USB_DR_MODE_HOST) ||  in dwc2_drd_role_sw_set()
93 	    (role == USB_ROLE_HOST && hsotg->dr_mode == USB_DR_MODE_PERIPHERAL))  in dwc2_drd_role_sw_set()
99 	if (role == USB_ROLE_NONE && hsotg->test_mode) {  in dwc2_drd_role_sw_set()
108 	 * If role-switch set is called before the udc_start, we need to enable  in dwc2_drd_role_sw_set()
121 	if (role == USB_ROLE_NONE) {  in dwc2_drd_role_sw_set()
122 		/* default operation mode when usb role is USB_ROLE_NONE */  in dwc2_drd_role_sw_set()
124 			role = USB_ROLE_HOST;  in dwc2_drd_role_sw_set()
126 			role = USB_ROLE_DEVICE;  in dwc2_drd_role_sw_set()
129 	if (role == USB_ROLE_HOST) {  in dwc2_drd_role_sw_set()
131 	} else if (role == USB_ROLE_DEVICE) {  in dwc2_drd_role_sw_set()
151 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_role_sw_set()
157 		role == USB_ROLE_NONE ? "No" :  in dwc2_drd_role_sw_set()
158 		role == USB_ROLE_HOST ? "A" : "B");  in dwc2_drd_role_sw_set()
169 	if (!device_property_read_bool(hsotg->dev, "usb-role-switch"))  in dwc2_drd_init()
182 			"failed to register role switch: %d\n", ret);  in dwc2_drd_init()
210 	enum usb_role role;  in dwc2_drd_resume()  local
213 		/* get last known role (as the get ops isn't implemented by this driver) */  in dwc2_drd_resume()
214 		role = usb_role_switch_get_role(hsotg->role_sw);  in dwc2_drd_resume()
216 		if (role == USB_ROLE_NONE) {  in dwc2_drd_resume()
218 				role = USB_ROLE_HOST;  in dwc2_drd_resume()
220 				role = USB_ROLE_DEVICE;  in dwc2_drd_resume()
223 		/* restore last role that may have been lost */  in dwc2_drd_resume()
224 		if (role == USB_ROLE_HOST)  in dwc2_drd_resume()
226 		else if (role == USB_ROLE_DEVICE)  in dwc2_drd_resume()
229 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_resume()
232 			role == USB_ROLE_NONE ? "No" :  in dwc2_drd_resume()
233 			role == USB_ROLE_HOST ? "A" : "B");  in dwc2_drd_resume()