27 static int cdns_idle_init(struct cdns *cdns);
29 static int cdns_role_start(struct cdns *cdns, enum usb_role role)  in cdns_role_start()  argument
36 	mutex_lock(&cdns->mutex);  in cdns_role_start()
37 	cdns->role = role;  in cdns_role_start()
38 	mutex_unlock(&cdns->mutex);  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()
46 	mutex_lock(&cdns->mutex);  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()
50 	mutex_unlock(&cdns->mutex);  in cdns_role_start()
55 static void cdns_role_stop(struct cdns *cdns)  in cdns_role_stop()  argument
57 	enum usb_role role = cdns->role;  in cdns_role_stop()
62 	if (cdns->roles[role]->state == CDNS_ROLE_STATE_INACTIVE)  in cdns_role_stop()
65 	mutex_lock(&cdns->mutex);  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()
68 	mutex_unlock(&cdns->mutex);  in cdns_role_stop()
71 static void cdns_exit_roles(struct cdns *cdns)  in cdns_exit_roles()  argument
73 	cdns_role_stop(cdns);  in cdns_exit_roles()
74 	cdns_drd_exit(cdns);  in cdns_exit_roles()
79  * @cdns: Pointer to cdns structure
83 static int cdns_core_init_role(struct cdns *cdns)  in cdns_core_init_role()  argument
85 	struct device *dev = cdns->dev;  in cdns_core_init_role()
91 	cdns->role = USB_ROLE_NONE;  in cdns_core_init_role()
99 		if (cdns->version == CDNSP_CONTROLLER_V2) {  in cdns_core_init_role()
119 	 * At this point cdns->dr_mode contains strap configuration.  in cdns_core_init_role()
122 	best_dr_mode = cdns->dr_mode;  in cdns_core_init_role()
124 	ret = cdns_idle_init(cdns);  in cdns_core_init_role()
129 		best_dr_mode = cdns->dr_mode;  in cdns_core_init_role()
130 	} else if (cdns->dr_mode == USB_DR_MODE_OTG) {  in cdns_core_init_role()
132 	} else if (cdns->dr_mode != dr_mode) {  in cdns_core_init_role()
140 		if ((cdns->version == CDNSP_CONTROLLER_V2 &&  in cdns_core_init_role()
142 		    (cdns->version < CDNSP_CONTROLLER_V2 &&  in cdns_core_init_role()
144 			ret = cdns_host_init(cdns);  in cdns_core_init_role()
156 		if (cdns->gadget_init)  in cdns_core_init_role()
157 			ret = cdns->gadget_init(cdns);  in cdns_core_init_role()
168 	cdns->dr_mode = dr_mode;  in cdns_core_init_role()
170 	ret = cdns_drd_update_mode(cdns);  in cdns_core_init_role()
175 	ret = cdns_role_start(cdns, USB_ROLE_NONE);  in cdns_core_init_role()
179 	switch (cdns->dr_mode) {  in cdns_core_init_role()
181 		ret = cdns_hw_role_switch(cdns);  in cdns_core_init_role()
186 		ret = cdns_role_start(cdns, USB_ROLE_DEVICE);  in cdns_core_init_role()
191 		ret = cdns_role_start(cdns, USB_ROLE_HOST);  in cdns_core_init_role()
202 	cdns_exit_roles(cdns);  in cdns_core_init_role()
208  * @cdns: Pointer to controller structure.
212 static enum usb_role cdns_hw_role_state_machine(struct cdns *cdns)  in cdns_hw_role_state_machine()  argument
217 	if (cdns->dr_mode != USB_DR_MODE_OTG) {  in cdns_hw_role_state_machine()
218 		if (cdns_is_host(cdns))  in cdns_hw_role_state_machine()
220 		if (cdns_is_device(cdns))  in cdns_hw_role_state_machine()
226 	id = cdns_get_id(cdns);  in cdns_hw_role_state_machine()
227 	vbus = cdns_get_vbus(cdns);  in cdns_hw_role_state_machine()
232 	 * Previous state: cdns->role  in cdns_hw_role_state_machine()
235 	role = cdns->role;  in cdns_hw_role_state_machine()
258 	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);  in cdns_hw_role_state_machine()
263 static int cdns_idle_role_start(struct cdns *cdns)  in cdns_idle_role_start()  argument
268 static void cdns_idle_role_stop(struct cdns *cdns)  in cdns_idle_role_stop()  argument
271 	phy_reset(cdns->usb3_phy);  in cdns_idle_role_stop()
274 static int cdns_idle_init(struct cdns *cdns)  in cdns_idle_init()  argument
278 	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);  in cdns_idle_init()
289 	cdns->roles[USB_ROLE_NONE] = rdrv;  in cdns_idle_init()
296  * @cdns: controller
298 int cdns_hw_role_switch(struct cdns *cdns)  in cdns_hw_role_switch()  argument
304 	if (cdns->role_sw)  in cdns_hw_role_switch()
307 	pm_runtime_get_sync(cdns->dev);  in cdns_hw_role_switch()
309 	current_role = cdns->role;  in cdns_hw_role_switch()
310 	real_role = cdns_hw_role_state_machine(cdns);  in cdns_hw_role_switch()
316 	cdns_role_stop(cdns);  in cdns_hw_role_switch()
318 	dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role);  in cdns_hw_role_switch()
320 	ret = cdns_role_start(cdns, real_role);  in cdns_hw_role_switch()
323 		dev_err(cdns->dev, "set %d has failed, back to %d\n",  in cdns_hw_role_switch()
325 		ret = cdns_role_start(cdns, current_role);  in cdns_hw_role_switch()
327 			dev_err(cdns->dev, "back to %d failed too\n",  in cdns_hw_role_switch()
331 	pm_runtime_put_sync(cdns->dev);  in cdns_hw_role_switch()
344 	struct cdns *cdns = usb_role_switch_get_drvdata(sw);  in cdns_role_get()  local
346 	return cdns->role;  in cdns_role_get()
360 	struct cdns *cdns = usb_role_switch_get_drvdata(sw);  in cdns_role_set()  local
363 	pm_runtime_get_sync(cdns->dev);  in cdns_role_set()
365 	if (cdns->role == role)  in cdns_role_set()
368 	if (cdns->dr_mode == USB_DR_MODE_HOST) {  in cdns_role_set()
378 	if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL) {  in cdns_role_set()
388 	cdns_role_stop(cdns);  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()
394 	pm_runtime_put_sync(cdns->dev);  in cdns_role_set()
401  * @data: structure of cdns
407 	struct cdns *cdns = data;  in cdns_wakeup_irq()  local
409 	if (cdns->in_lpm) {  in cdns_wakeup_irq()
411 		cdns->wakeup_pending = true;  in cdns_wakeup_irq()
412 		if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev)  in cdns_wakeup_irq()
413 			pm_request_resume(&cdns->host_dev->dev);  in cdns_wakeup_irq()
423  * @cdns: Pointer to cdns structure.
427 int cdns_init(struct cdns *cdns)  in cdns_init()  argument
429 	struct device *dev = cdns->dev;  in cdns_init()
438 	mutex_init(&cdns->mutex);  in cdns_init()
446 		sw_desc.driver_data = cdns;  in cdns_init()
449 		cdns->role_sw = usb_role_switch_register(dev, &sw_desc);  in cdns_init()
450 		if (IS_ERR(cdns->role_sw)) {  in cdns_init()
452 			return PTR_ERR(cdns->role_sw);  in cdns_init()
456 	if (cdns->wakeup_irq) {  in cdns_init()
457 		ret = devm_request_irq(cdns->dev, cdns->wakeup_irq,  in cdns_init()
460 						dev_name(cdns->dev), cdns);  in cdns_init()
463 			dev_err(cdns->dev, "couldn't register wakeup irq handler\n");  in cdns_init()
468 	ret = cdns_drd_init(cdns);  in cdns_init()
472 	ret = cdns_core_init_role(cdns);  in cdns_init()
476 	spin_lock_init(&cdns->lock);  in cdns_init()
482 	cdns_drd_exit(cdns);  in cdns_init()
484 	if (cdns->role_sw)  in cdns_init()
485 		usb_role_switch_unregister(cdns->role_sw);  in cdns_init()
493  * @cdns: Pointer to cdns structure.
497 int cdns_remove(struct cdns *cdns)  in cdns_remove()  argument
499 	cdns_exit_roles(cdns);  in cdns_remove()
500 	usb_role_switch_unregister(cdns->role_sw);  in cdns_remove()
507 int cdns_suspend(struct cdns *cdns)  in cdns_suspend()  argument
509 	struct device *dev = cdns->dev;  in cdns_suspend()
515 	if (cdns->roles[cdns->role]->suspend) {  in cdns_suspend()
516 		spin_lock_irqsave(&cdns->lock, flags);  in cdns_suspend()
517 		cdns->roles[cdns->role]->suspend(cdns, false);  in cdns_suspend()
518 		spin_unlock_irqrestore(&cdns->lock, flags);  in cdns_suspend()
525 int cdns_resume(struct cdns *cdns)  in cdns_resume()  argument
531 	if (cdns_power_is_lost(cdns)) {  in cdns_resume()
532 		if (!cdns->role_sw) {  in cdns_resume()
533 			real_role = cdns_hw_role_state_machine(cdns);  in cdns_resume()
534 			if (real_role != cdns->role) {  in cdns_resume()
535 				ret = cdns_hw_role_switch(cdns);  in cdns_resume()
543 			if (cdns->role == USB_ROLE_HOST)  in cdns_resume()
544 				ret = cdns_drd_host_on(cdns);  in cdns_resume()
545 			else if (cdns->role == USB_ROLE_DEVICE)  in cdns_resume()
546 				ret = cdns_drd_gadget_on(cdns);  in cdns_resume()
553 	if (cdns->roles[cdns->role]->resume)  in cdns_resume()
554 		cdns->roles[cdns->role]->resume(cdns, cdns_power_is_lost(cdns));  in cdns_resume()
560 void cdns_set_active(struct cdns *cdns, u8 set_active)  in cdns_set_active()  argument
562 	struct device *dev = cdns->dev;  in cdns_set_active()