usb/dwc3/dwc3-rtk.c

3  * dwc3-rtk.c - Realtek DWC3 Specific Glue layer
64 static void switch_usb2_role(struct dwc3_rtk *rtk, enum usb_role role)
69 	reg = rtk->regs + WRAP_USB2_PHY_REG;
80 		dev_dbg(rtk->dev, "%s: role=%d\n", __func__, role);
85 static void switch_dwc3_role(struct dwc3_rtk *rtk, enum usb_role role)
87 	if (!rtk->dwc->role_sw)
90 	usb_role_switch_set_role(rtk->dwc->role_sw, role);
93 static enum usb_role dwc3_rtk_get_role(struct dwc3_rtk *rtk)
97 	role = rtk->cur_role;
99 	if (rtk->dwc && rtk->dwc->role_sw)
100 		role = usb_role_switch_get_role(rtk->dwc->role_sw);
102 		dev_dbg(rtk->dev, "%s not usb_role_switch role=%d\n", __func__, role);
107 static void dwc3_rtk_set_role(struct dwc3_rtk *rtk, enum usb_role role)
109 	rtk->cur_role = role;
111 	switch_dwc3_role(rtk, role);
113 	switch_usb2_role(rtk, role);
119 	struct dwc3_rtk *rtk = usb_role_switch_get_drvdata(sw);
121 	dwc3_rtk_set_role(rtk, role);
128 	struct dwc3_rtk *rtk = usb_role_switch_get_drvdata(sw);
130 	return dwc3_rtk_get_role(rtk);
133 static int dwc3_rtk_setup_role_switch(struct dwc3_rtk *rtk)
137 	dwc3_role_switch.name = dev_name(rtk->dev);
138 	dwc3_role_switch.driver_data = rtk;
140 	dwc3_role_switch.fwnode = dev_fwnode(rtk->dev);
143 	rtk->role_switch = usb_role_switch_register(rtk->dev, &dwc3_role_switch);
144 	if (IS_ERR(rtk->role_switch))
145 		return PTR_ERR(rtk->role_switch);
150 static int dwc3_rtk_remove_role_switch(struct dwc3_rtk *rtk)
152 	if (rtk->role_switch)
153 		usb_role_switch_unregister(rtk->role_switch);
155 	rtk->role_switch = NULL;
196 static int dwc3_rtk_init(struct dwc3_rtk *rtk)
198 	struct device *dev = rtk->dev;
211 		reg = rtk->regs + WRAP_CTR_REG;
218 		reg = rtk->regs + WRAP_USB2_PHY_REG;
224 	reg = rtk->regs + WRAP_USB2_PHY_UTMI_REG;
231 			reg = rtk->regs + WRAP_USB_HMAC_CTR0_REG;
235 			reg = rtk->regs + WRAP_CTR_REG;
239 			reg = rtk->regs + WRAP_PHY_PIPE_REG;
243 			reg =  rtk->regs + WRAP_USB_HMAC_CTR0_REG;
247 			reg = rtk->regs + WRAP_APHY_REG;
251 			dev_dbg(rtk->dev, "%s: disable usb 3.0 phy\n", __func__);
255 	reg = rtk->regs + WRAP_CTR_REG;
260 	reg = rtk->regs + WRAP_USB2_PHY_REG;
264 	if (rtk->pm_base) {
265 		reg = rtk->pm_base + USB_DBUS_PWR_CTRL_REG;
273 static int dwc3_rtk_probe_dwc3_core(struct dwc3_rtk *rtk)
275 	struct device *dev = rtk->dev;
283 	ret = dwc3_rtk_init(rtk);
308 	rtk->dwc = platform_get_drvdata(dwc3_pdev);
309 	if (!rtk->dwc) {
316 	if (dr_mode != rtk->dwc->dr_mode) {
318 			 dr_mode, rtk->dwc->dr_mode);
319 		dr_mode = rtk->dwc->dr_mode;
324 		rtk->cur_role = USB_ROLE_DEVICE;
327 		rtk->cur_role = USB_ROLE_HOST;
330 		dev_dbg(rtk->dev, "%s: dr_mode=%d\n", __func__, dr_mode);
335 		ret = dwc3_rtk_setup_role_switch(rtk);
340 		rtk->cur_role = dwc3_rtk_get_role(rtk);
343 	switch_usb2_role(rtk, rtk->cur_role);
362 	struct dwc3_rtk *rtk;
368 	rtk = devm_kzalloc(dev, sizeof(*rtk), GFP_KERNEL);
369 	if (!rtk) {
374 	platform_set_drvdata(pdev, rtk);
376 	rtk->dev = dev;
391 	rtk->regs = regs;
392 	rtk->regs_size = resource_size(res);
396 		rtk->pm_base = devm_ioremap_resource(dev, res);
397 		if (IS_ERR(rtk->pm_base)) {
398 			ret = PTR_ERR(rtk->pm_base);
403 	ret = dwc3_rtk_probe_dwc3_core(rtk);
411 	struct dwc3_rtk *rtk = platform_get_drvdata(pdev);
413 	rtk->dwc = NULL;
415 	dwc3_rtk_remove_role_switch(rtk);
417 	of_platform_depopulate(rtk->dev);
422 	struct dwc3_rtk *rtk = platform_get_drvdata(pdev);
424 	of_platform_depopulate(rtk->dev);
441 	struct dwc3_rtk *rtk = dev_get_drvdata(dev);
443 	dwc3_rtk_init(rtk);
445 	switch_usb2_role(rtk, rtk->cur_role);
468 		.name	= "rtk-dwc3",
479 MODULE_ALIAS("platform:rtk-dwc3");