29 static int cdns_role_start(struct cdns *cdns, enum usb_role role)  in cdns_role_start()  argument
33 	if (WARN_ON(role > USB_ROLE_DEVICE))  in cdns_role_start()
37 	cdns->role = role;  in cdns_role_start()
40 	if (!cdns->roles[role])  in cdns_role_start()
43 	if (cdns->roles[role]->state == CDNS_ROLE_STATE_ACTIVE)  in cdns_role_start()
47 	ret = cdns->roles[role]->start(cdns);  in cdns_role_start()
49 		cdns->roles[role]->state = CDNS_ROLE_STATE_ACTIVE;  in cdns_role_start()
57 	enum usb_role role = cdns->role;  in cdns_role_stop()  local
59 	if (WARN_ON(role > USB_ROLE_DEVICE))  in cdns_role_stop()
62 	if (cdns->roles[role]->state == CDNS_ROLE_STATE_INACTIVE)  in cdns_role_stop()
66 	cdns->roles[role]->stop(cdns);  in cdns_role_stop()
67 	cdns->roles[role]->state = CDNS_ROLE_STATE_INACTIVE;  in cdns_role_stop()
78  * cdns_core_init_role - initialize role of operation
91 	cdns->role = USB_ROLE_NONE;  in cdns_core_init_role()
174 	/* Initialize idle role to start with */  in cdns_core_init_role()
207  * cdns_hw_role_state_machine  - role switch state machine based on hw events.
210  * Returns next role to be entered based on hw events.
214 	enum usb_role role = USB_ROLE_NONE;  in cdns_hw_role_state_machine()  local
219 			role = USB_ROLE_HOST;  in cdns_hw_role_state_machine()
221 			role = USB_ROLE_DEVICE;  in cdns_hw_role_state_machine()
223 		return role;  in cdns_hw_role_state_machine()
230 	 * Role change state machine  in cdns_hw_role_state_machine()
232 	 * Previous state: cdns->role  in cdns_hw_role_state_machine()
233 	 * Next state: role  in cdns_hw_role_state_machine()
235 	role = cdns->role;  in cdns_hw_role_state_machine()
237 	switch (role) {  in cdns_hw_role_state_machine()
244 			role = USB_ROLE_HOST;  in cdns_hw_role_state_machine()
246 			role = USB_ROLE_DEVICE;  in cdns_hw_role_state_machine()
250 			role = USB_ROLE_NONE;  in cdns_hw_role_state_machine()
254 			role = USB_ROLE_NONE;  in cdns_hw_role_state_machine()
258 	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);  in cdns_hw_role_state_machine()
260 	return role;  in cdns_hw_role_state_machine()
303 	/* Depends on role switch class */  in cdns_hw_role_switch()
309 	current_role = cdns->role;  in cdns_hw_role_switch()
318 	dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role);  in cdns_hw_role_switch()
322 		/* Back to current role */  in cdns_hw_role_switch()
336  * cdns_role_get - get current role of controller.
338  * @sw: pointer to USB role switch structure
340  * Returns role
346 	return cdns->role;  in cdns_role_get()
350  * cdns_role_set - set current role of controller.
352  * @sw: pointer to USB role switch structure
353  * @role: the previous role
355  * - Role switch for dual-role devices
358 static int cdns_role_set(struct usb_role_switch *sw, enum usb_role role)  in cdns_role_set()  argument
365 	if (cdns->role == role)  in cdns_role_set()
369 		switch (role) {  in cdns_role_set()
379 		switch (role) {  in cdns_role_set()
389 	ret = cdns_role_start(cdns, role);  in cdns_role_set()
391 		dev_err(cdns->dev, "set role %d has failed\n", role);  in cdns_role_set()
412 		if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev)  in cdns_wakeup_irq()
440 	if (device_property_read_bool(dev, "usb-role-switch")) {  in cdns_init()
451 			dev_warn(dev, "Unable to register Role Switch\n");  in cdns_init()
515 	if (cdns->roles[cdns->role]->suspend) {  in cdns_suspend()
517 		cdns->roles[cdns->role]->suspend(cdns, false);  in cdns_suspend()
533 			cdns->role = cdns_role_get(cdns->role_sw);  in cdns_resume()
536 			if (real_role != cdns->role) {  in cdns_resume()
545 			if (cdns->role == USB_ROLE_HOST)  in cdns_resume()
547 			else if (cdns->role == USB_ROLE_DEVICE)  in cdns_resume()
555 	if (cdns->roles[cdns->role]->resume)  in cdns_resume()
556 		cdns->roles[cdns->role]->resume(cdns, cdns_power_is_lost(cdns));  in cdns_resume()