28 static int cdns3_idle_init(struct cdns3 *cdns);
31 struct cdns3_role_driver *cdns3_get_current_role_driver(struct cdns3 *cdns)  in cdns3_get_current_role_driver()  argument
33 	WARN_ON(!cdns->roles[cdns->role]);  in cdns3_get_current_role_driver()
34 	return cdns->roles[cdns->role];  in cdns3_get_current_role_driver()
37 static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role)  in cdns3_role_start()  argument
44 	mutex_lock(&cdns->mutex);  in cdns3_role_start()
45 	cdns->role = role;  in cdns3_role_start()
46 	mutex_unlock(&cdns->mutex);  in cdns3_role_start()
48 	if (!cdns->roles[role])  in cdns3_role_start()
51 	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_ACTIVE)  in cdns3_role_start()
54 	mutex_lock(&cdns->mutex);  in cdns3_role_start()
55 	ret = cdns->roles[role]->start(cdns);  in cdns3_role_start()
57 		cdns->roles[role]->state = CDNS3_ROLE_STATE_ACTIVE;  in cdns3_role_start()
58 	mutex_unlock(&cdns->mutex);  in cdns3_role_start()
63 static void cdns3_role_stop(struct cdns3 *cdns)  in cdns3_role_stop()  argument
65 	enum usb_role role = cdns->role;  in cdns3_role_stop()
70 	if (cdns->roles[role]->state == CDNS3_ROLE_STATE_INACTIVE)  in cdns3_role_stop()
73 	mutex_lock(&cdns->mutex);  in cdns3_role_stop()
74 	cdns->roles[role]->stop(cdns);  in cdns3_role_stop()
75 	cdns->roles[role]->state = CDNS3_ROLE_STATE_INACTIVE;  in cdns3_role_stop()
76 	mutex_unlock(&cdns->mutex);  in cdns3_role_stop()
79 static void cdns3_exit_roles(struct cdns3 *cdns)  in cdns3_exit_roles()  argument
81 	cdns3_role_stop(cdns);  in cdns3_exit_roles()
82 	cdns3_drd_exit(cdns);  in cdns3_exit_roles()
85 static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns);
93 static int cdns3_core_init_role(struct cdns3 *cdns)  in cdns3_core_init_role()  argument
95 	struct device *dev = cdns->dev;  in cdns3_core_init_role()
101 	cdns->role = USB_ROLE_NONE;  in cdns3_core_init_role()
122 	best_dr_mode = cdns->dr_mode;  in cdns3_core_init_role()
124 	ret = cdns3_idle_init(cdns);  in cdns3_core_init_role()
129 		best_dr_mode = cdns->dr_mode;  in cdns3_core_init_role()
130 	} else if (cdns->dr_mode == USB_DR_MODE_OTG) {  in cdns3_core_init_role()
132 	} else if (cdns->dr_mode != dr_mode) {  in cdns3_core_init_role()
140 		ret = cdns3_host_init(cdns);  in cdns3_core_init_role()
149 		ret = cdns3_gadget_init(cdns);  in cdns3_core_init_role()
157 	cdns->dr_mode = dr_mode;  in cdns3_core_init_role()
159 	ret = cdns3_drd_update_mode(cdns);  in cdns3_core_init_role()
164 	ret = cdns3_role_start(cdns, USB_ROLE_NONE);  in cdns3_core_init_role()
168 	switch (cdns->dr_mode) {  in cdns3_core_init_role()
170 		ret = cdns3_hw_role_switch(cdns);  in cdns3_core_init_role()
175 		ret = cdns3_role_start(cdns, USB_ROLE_DEVICE);  in cdns3_core_init_role()
180 		ret = cdns3_role_start(cdns, USB_ROLE_HOST);  in cdns3_core_init_role()
191 	cdns3_exit_roles(cdns);  in cdns3_core_init_role()
201 static enum usb_role cdsn3_hw_role_state_machine(struct cdns3 *cdns)  in cdsn3_hw_role_state_machine()  argument
206 	if (cdns->dr_mode != USB_DR_MODE_OTG)  in cdsn3_hw_role_state_machine()
209 	id = cdns3_get_id(cdns);  in cdsn3_hw_role_state_machine()
210 	vbus = cdns3_get_vbus(cdns);  in cdsn3_hw_role_state_machine()
218 	role = cdns->role;  in cdsn3_hw_role_state_machine()
241 	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);  in cdsn3_hw_role_state_machine()
246 	if (cdns3_is_host(cdns))  in cdsn3_hw_role_state_machine()
248 	if (cdns3_is_device(cdns))  in cdsn3_hw_role_state_machine()
254 static int cdns3_idle_role_start(struct cdns3 *cdns)  in cdns3_idle_role_start()  argument
259 static void cdns3_idle_role_stop(struct cdns3 *cdns)  in cdns3_idle_role_stop()  argument
262 	phy_reset(cdns->usb3_phy);  in cdns3_idle_role_stop()
265 static int cdns3_idle_init(struct cdns3 *cdns)  in cdns3_idle_init()  argument
269 	rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL);  in cdns3_idle_init()
280 	cdns->roles[USB_ROLE_NONE] = rdrv;  in cdns3_idle_init()
289 int cdns3_hw_role_switch(struct cdns3 *cdns)  in cdns3_hw_role_switch()  argument
295 	if (cdns->role_override)  in cdns3_hw_role_switch()
298 	pm_runtime_get_sync(cdns->dev);  in cdns3_hw_role_switch()
300 	current_role = cdns->role;  in cdns3_hw_role_switch()
301 	real_role = cdsn3_hw_role_state_machine(cdns);  in cdns3_hw_role_switch()
307 	cdns3_role_stop(cdns);  in cdns3_hw_role_switch()
309 	dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role);  in cdns3_hw_role_switch()
311 	ret = cdns3_role_start(cdns, real_role);  in cdns3_hw_role_switch()
314 		dev_err(cdns->dev, "set %d has failed, back to %d\n",  in cdns3_hw_role_switch()
316 		ret = cdns3_role_start(cdns, current_role);  in cdns3_hw_role_switch()
318 			dev_err(cdns->dev, "back to %d failed too\n",  in cdns3_hw_role_switch()
322 	pm_runtime_put_sync(cdns->dev);  in cdns3_hw_role_switch()
335 	struct cdns3 *cdns = dev_get_drvdata(dev);  in cdns3_role_get()  local
337 	return cdns->role;  in cdns3_role_get()
351 	struct cdns3 *cdns = dev_get_drvdata(dev);  in cdns3_role_set()  local
354 	pm_runtime_get_sync(cdns->dev);  in cdns3_role_set()
376 		cdns->role_override = 0;  in cdns3_role_set()
378 		cdns->role_override = 1;  in cdns3_role_set()
384 	if (!cdns->role_override && cdns->dr_mode == USB_DR_MODE_OTG) {  in cdns3_role_set()
385 		cdns3_hw_role_switch(cdns);  in cdns3_role_set()
389 	if (cdns->role == role)  in cdns3_role_set()
392 	if (cdns->dr_mode == USB_DR_MODE_HOST) {  in cdns3_role_set()
403 	if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL) {  in cdns3_role_set()
414 	cdns3_role_stop(cdns);  in cdns3_role_set()
415 	ret = cdns3_role_start(cdns, role);  in cdns3_role_set()
417 		dev_err(cdns->dev, "set role %d has failed\n", role);  in cdns3_role_set()
422 	pm_runtime_put_sync(cdns->dev);  in cdns3_role_set()
442 	struct cdns3 *cdns;  in cdns3_probe()  local
452 	cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);  in cdns3_probe()
453 	if (!cdns)  in cdns3_probe()
456 	cdns->dev = dev;  in cdns3_probe()
458 	platform_set_drvdata(pdev, cdns);  in cdns3_probe()
466 	cdns->xhci_res[0] = *res;  in cdns3_probe()
474 	cdns->xhci_res[1] = *res;  in cdns3_probe()
476 	cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");  in cdns3_probe()
477 	if (cdns->dev_irq == -EPROBE_DEFER)  in cdns3_probe()
478 		return cdns->dev_irq;  in cdns3_probe()
480 	if (cdns->dev_irq < 0)  in cdns3_probe()
487 	cdns->dev_regs	= regs;  in cdns3_probe()
489 	cdns->otg_irq = platform_get_irq_byname(pdev, "otg");  in cdns3_probe()
490 	if (cdns->otg_irq == -EPROBE_DEFER)  in cdns3_probe()
491 		return cdns->otg_irq;  in cdns3_probe()
493 	if (cdns->otg_irq < 0) {  in cdns3_probe()
495 		return cdns->otg_irq;  in cdns3_probe()
504 	cdns->otg_res = *res;  in cdns3_probe()
506 	mutex_init(&cdns->mutex);  in cdns3_probe()
508 	cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");  in cdns3_probe()
509 	if (IS_ERR(cdns->usb2_phy))  in cdns3_probe()
510 		return PTR_ERR(cdns->usb2_phy);  in cdns3_probe()
512 	ret = phy_init(cdns->usb2_phy);  in cdns3_probe()
516 	cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");  in cdns3_probe()
517 	if (IS_ERR(cdns->usb3_phy))  in cdns3_probe()
518 		return PTR_ERR(cdns->usb3_phy);  in cdns3_probe()
520 	ret = phy_init(cdns->usb3_phy);  in cdns3_probe()
524 	ret = phy_power_on(cdns->usb2_phy);  in cdns3_probe()
528 	ret = phy_power_on(cdns->usb3_phy);  in cdns3_probe()
532 	cdns->role_sw = usb_role_switch_register(dev, &cdns3_switch_desc);  in cdns3_probe()
533 	if (IS_ERR(cdns->role_sw)) {  in cdns3_probe()
534 		ret = PTR_ERR(cdns->role_sw);  in cdns3_probe()
539 	ret = cdns3_drd_init(cdns);  in cdns3_probe()
543 	ret = cdns3_core_init_role(cdns);  in cdns3_probe()
563 	cdns3_drd_exit(cdns);  in cdns3_probe()
564 	usb_role_switch_unregister(cdns->role_sw);  in cdns3_probe()
566 	phy_power_off(cdns->usb3_phy);  in cdns3_probe()
569 	phy_power_off(cdns->usb2_phy);  in cdns3_probe()
571 	phy_exit(cdns->usb3_phy);  in cdns3_probe()
573 	phy_exit(cdns->usb2_phy);  in cdns3_probe()
586 	struct cdns3 *cdns = platform_get_drvdata(pdev);  in cdns3_remove()  local
591 	cdns3_exit_roles(cdns);  in cdns3_remove()
592 	usb_role_switch_unregister(cdns->role_sw);  in cdns3_remove()
593 	phy_power_off(cdns->usb2_phy);  in cdns3_remove()
594 	phy_power_off(cdns->usb3_phy);  in cdns3_remove()
595 	phy_exit(cdns->usb2_phy);  in cdns3_remove()
596 	phy_exit(cdns->usb3_phy);  in cdns3_remove()
604 	struct cdns3 *cdns = dev_get_drvdata(dev);  in cdns3_suspend()  local
607 	if (cdns->role == USB_ROLE_HOST)  in cdns3_suspend()
613 	if (cdns->roles[cdns->role]->suspend) {  in cdns3_suspend()
614 		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);  in cdns3_suspend()
615 		cdns->roles[cdns->role]->suspend(cdns, false);  in cdns3_suspend()
616 		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);  in cdns3_suspend()
624 	struct cdns3 *cdns = dev_get_drvdata(dev);  in cdns3_resume()  local
627 	if (cdns->role == USB_ROLE_HOST)  in cdns3_resume()
630 	if (cdns->roles[cdns->role]->resume) {  in cdns3_resume()
631 		spin_lock_irqsave(&cdns->gadget_dev->lock, flags);  in cdns3_resume()
632 		cdns->roles[cdns->role]->resume(cdns, false);  in cdns3_resume()
633 		spin_unlock_irqrestore(&cdns->gadget_dev->lock, flags);  in cdns3_resume()