20 static void dwc2_ovr_init(struct dwc2_hsotg *hsotg)  in dwc2_ovr_init()  argument
25 	spin_lock_irqsave(&hsotg->lock, flags);  in dwc2_ovr_init()
27 	gotgctl = dwc2_readl(hsotg, GOTGCTL);  in dwc2_ovr_init()
30 	if (hsotg->role_sw_default_mode == USB_DR_MODE_HOST)  in dwc2_ovr_init()
32 	else if (hsotg->role_sw_default_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_ovr_init()
34 	dwc2_writel(hsotg, gotgctl, GOTGCTL);  in dwc2_ovr_init()
36 	spin_unlock_irqrestore(&hsotg->lock, flags);  in dwc2_ovr_init()
38 	dwc2_force_mode(hsotg, (hsotg->dr_mode == USB_DR_MODE_HOST));  in dwc2_ovr_init()
41 static int dwc2_ovr_avalid(struct dwc2_hsotg *hsotg, bool valid)  in dwc2_ovr_avalid()  argument
43 	u32 gotgctl = dwc2_readl(hsotg, GOTGCTL);  in dwc2_ovr_avalid()
58 	dwc2_writel(hsotg, gotgctl, GOTGCTL);  in dwc2_ovr_avalid()
63 static int dwc2_ovr_bvalid(struct dwc2_hsotg *hsotg, bool valid)  in dwc2_ovr_bvalid()  argument
65 	u32 gotgctl = dwc2_readl(hsotg, GOTGCTL);  in dwc2_ovr_bvalid()
80 	dwc2_writel(hsotg, gotgctl, GOTGCTL);  in dwc2_ovr_bvalid()
87 	struct dwc2_hsotg *hsotg = usb_role_switch_get_drvdata(sw);  in dwc2_drd_role_sw_set()  local
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()
100 		dev_dbg(hsotg->dev, "Core is in test mode\n");  in dwc2_drd_role_sw_set()
112 	if (!hsotg->ll_hw_enabled && hsotg->clk) {  in dwc2_drd_role_sw_set()
113 		int ret = clk_prepare_enable(hsotg->clk);  in dwc2_drd_role_sw_set()
119 	spin_lock_irqsave(&hsotg->lock, flags);  in dwc2_drd_role_sw_set()
123 		if (hsotg->role_sw_default_mode == USB_DR_MODE_HOST)  in dwc2_drd_role_sw_set()
125 		else if (hsotg->role_sw_default_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_drd_role_sw_set()
130 		already = dwc2_ovr_avalid(hsotg, true);  in dwc2_drd_role_sw_set()
132 		already = dwc2_ovr_bvalid(hsotg, true);  in dwc2_drd_role_sw_set()
133 		if (dwc2_is_device_enabled(hsotg)) {  in dwc2_drd_role_sw_set()
135 			dwc2_hsotg_core_connect(hsotg);  in dwc2_drd_role_sw_set()
138 		if (dwc2_is_device_mode(hsotg)) {  in dwc2_drd_role_sw_set()
139 			if (!dwc2_ovr_bvalid(hsotg, false))  in dwc2_drd_role_sw_set()
141 				dwc2_hsotg_core_disconnect(hsotg);  in dwc2_drd_role_sw_set()
143 			dwc2_ovr_avalid(hsotg, false);  in dwc2_drd_role_sw_set()
147 	spin_unlock_irqrestore(&hsotg->lock, flags);  in dwc2_drd_role_sw_set()
149 	if (!already && hsotg->dr_mode == USB_DR_MODE_OTG)  in dwc2_drd_role_sw_set()
151 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_role_sw_set()
153 	if (!hsotg->ll_hw_enabled && hsotg->clk)  in dwc2_drd_role_sw_set()
154 		clk_disable_unprepare(hsotg->clk);  in dwc2_drd_role_sw_set()
156 	dev_dbg(hsotg->dev, "%s-session valid\n",  in dwc2_drd_role_sw_set()
163 int dwc2_drd_init(struct dwc2_hsotg *hsotg)  in dwc2_drd_init()  argument
169 	if (!device_property_read_bool(hsotg->dev, "usb-role-switch"))  in dwc2_drd_init()
172 	hsotg->role_sw_default_mode = usb_get_role_switch_default_mode(hsotg->dev);  in dwc2_drd_init()
173 	role_sw_desc.driver_data = hsotg;  in dwc2_drd_init()
174 	role_sw_desc.fwnode = dev_fwnode(hsotg->dev);  in dwc2_drd_init()
178 	role_sw = usb_role_switch_register(hsotg->dev, &role_sw_desc);  in dwc2_drd_init()
181 		dev_err(hsotg->dev,  in dwc2_drd_init()
186 	hsotg->role_sw = role_sw;  in dwc2_drd_init()
189 	dwc2_ovr_init(hsotg);  in dwc2_drd_init()
194 void dwc2_drd_suspend(struct dwc2_hsotg *hsotg)  in dwc2_drd_suspend()  argument
198 	if (hsotg->role_sw && !hsotg->params.external_id_pin_ctl) {  in dwc2_drd_suspend()
199 		gintmsk = dwc2_readl(hsotg, GINTMSK);  in dwc2_drd_suspend()
201 		dwc2_writel(hsotg, gintmsk, GINTMSK);  in dwc2_drd_suspend()
202 		gintsts = dwc2_readl(hsotg, GINTSTS);  in dwc2_drd_suspend()
203 		dwc2_writel(hsotg, gintsts | GINTSTS_CONIDSTSCHNG, GINTSTS);  in dwc2_drd_suspend()
207 void dwc2_drd_resume(struct dwc2_hsotg *hsotg)  in dwc2_drd_resume()  argument
212 	if (hsotg->role_sw) {  in dwc2_drd_resume()
214 		role = usb_role_switch_get_role(hsotg->role_sw);  in dwc2_drd_resume()
217 			if (hsotg->role_sw_default_mode == USB_DR_MODE_HOST)  in dwc2_drd_resume()
219 			else if (hsotg->role_sw_default_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_drd_resume()
225 			dwc2_ovr_avalid(hsotg, true);  in dwc2_drd_resume()
227 			dwc2_ovr_bvalid(hsotg, true);  in dwc2_drd_resume()
229 		dwc2_force_mode(hsotg, role == USB_ROLE_HOST);  in dwc2_drd_resume()
231 		dev_dbg(hsotg->dev, "resuming %s-session valid\n",  in dwc2_drd_resume()
236 	if (hsotg->role_sw && !hsotg->params.external_id_pin_ctl) {  in dwc2_drd_resume()
237 		gintsts = dwc2_readl(hsotg, GINTSTS);  in dwc2_drd_resume()
238 		dwc2_writel(hsotg, gintsts | GINTSTS_CONIDSTSCHNG, GINTSTS);  in dwc2_drd_resume()
239 		gintmsk = dwc2_readl(hsotg, GINTMSK);  in dwc2_drd_resume()
241 		dwc2_writel(hsotg, gintmsk, GINTMSK);  in dwc2_drd_resume()
245 void dwc2_drd_exit(struct dwc2_hsotg *hsotg)  in dwc2_drd_exit()  argument
247 	if (hsotg->role_sw)  in dwc2_drd_exit()
248 		usb_role_switch_unregister(hsotg->role_sw);  in dwc2_drd_exit()