82 static int dwc2_get_dr_mode(struct dwc2_hsotg *hsotg)  in dwc2_get_dr_mode()  argument
86 	hsotg->dr_mode = usb_get_dr_mode(hsotg->dev);  in dwc2_get_dr_mode()
87 	if (hsotg->dr_mode == USB_DR_MODE_UNKNOWN)  in dwc2_get_dr_mode()
88 		hsotg->dr_mode = USB_DR_MODE_OTG;  in dwc2_get_dr_mode()
90 	mode = hsotg->dr_mode;  in dwc2_get_dr_mode()
92 	if (dwc2_hw_is_device(hsotg)) {  in dwc2_get_dr_mode()
94 			dev_err(hsotg->dev,  in dwc2_get_dr_mode()
99 	} else if (dwc2_hw_is_host(hsotg)) {  in dwc2_get_dr_mode()
101 			dev_err(hsotg->dev,  in dwc2_get_dr_mode()
113 	if (mode != hsotg->dr_mode) {  in dwc2_get_dr_mode()
114 		dev_warn(hsotg->dev,  in dwc2_get_dr_mode()
118 		hsotg->dr_mode = mode;  in dwc2_get_dr_mode()
124 static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_enable()  argument
126 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_enable()
129 	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),  in __dwc2_lowlevel_hw_enable()
130 				    hsotg->supplies);  in __dwc2_lowlevel_hw_enable()
134 	if (hsotg->clk) {  in __dwc2_lowlevel_hw_enable()
135 		ret = clk_prepare_enable(hsotg->clk);  in __dwc2_lowlevel_hw_enable()
140 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_enable()
141 		ret = usb_phy_init(hsotg->uphy);  in __dwc2_lowlevel_hw_enable()
142 	} else if (hsotg->plat && hsotg->plat->phy_init) {  in __dwc2_lowlevel_hw_enable()
143 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_enable()
145 		ret = phy_power_on(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
147 			ret = phy_init(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
160 int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_enable()  argument
162 	int ret = __dwc2_lowlevel_hw_enable(hsotg);  in dwc2_lowlevel_hw_enable()
165 		hsotg->ll_hw_enabled = true;  in dwc2_lowlevel_hw_enable()
169 static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_disable()  argument
171 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_disable()
174 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_disable()
175 		usb_phy_shutdown(hsotg->uphy);  in __dwc2_lowlevel_hw_disable()
176 	} else if (hsotg->plat && hsotg->plat->phy_exit) {  in __dwc2_lowlevel_hw_disable()
177 		ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_disable()
179 		ret = phy_exit(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
181 			ret = phy_power_off(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
186 	if (hsotg->clk)  in __dwc2_lowlevel_hw_disable()
187 		clk_disable_unprepare(hsotg->clk);  in __dwc2_lowlevel_hw_disable()
189 	ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),  in __dwc2_lowlevel_hw_disable()
190 				     hsotg->supplies);  in __dwc2_lowlevel_hw_disable()
202 int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_disable()  argument
204 	int ret = __dwc2_lowlevel_hw_disable(hsotg);  in dwc2_lowlevel_hw_disable()
207 		hsotg->ll_hw_enabled = false;  in dwc2_lowlevel_hw_disable()
211 static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_init()  argument
215 	hsotg->reset = devm_reset_control_get_optional(hsotg->dev, "dwc2");  in dwc2_lowlevel_hw_init()
216 	if (IS_ERR(hsotg->reset)) {  in dwc2_lowlevel_hw_init()
217 		ret = PTR_ERR(hsotg->reset);  in dwc2_lowlevel_hw_init()
218 		dev_err(hsotg->dev, "error getting reset control %d\n", ret);  in dwc2_lowlevel_hw_init()
222 	reset_control_deassert(hsotg->reset);  in dwc2_lowlevel_hw_init()
224 	hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev, "dwc2-ecc");  in dwc2_lowlevel_hw_init()
225 	if (IS_ERR(hsotg->reset_ecc)) {  in dwc2_lowlevel_hw_init()
226 		ret = PTR_ERR(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
227 		dev_err(hsotg->dev, "error getting reset control for ecc %d\n", ret);  in dwc2_lowlevel_hw_init()
231 	reset_control_deassert(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
237 	hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");  in dwc2_lowlevel_hw_init()
238 	if (IS_ERR(hsotg->phy)) {  in dwc2_lowlevel_hw_init()
239 		ret = PTR_ERR(hsotg->phy);  in dwc2_lowlevel_hw_init()
243 			hsotg->phy = NULL;  in dwc2_lowlevel_hw_init()
248 			dev_err(hsotg->dev, "error getting phy %d\n", ret);  in dwc2_lowlevel_hw_init()
253 	if (!hsotg->phy) {  in dwc2_lowlevel_hw_init()
254 		hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);  in dwc2_lowlevel_hw_init()
255 		if (IS_ERR(hsotg->uphy)) {  in dwc2_lowlevel_hw_init()
256 			ret = PTR_ERR(hsotg->uphy);  in dwc2_lowlevel_hw_init()
260 				hsotg->uphy = NULL;  in dwc2_lowlevel_hw_init()
265 				dev_err(hsotg->dev, "error getting usb phy %d\n",  in dwc2_lowlevel_hw_init()
272 	hsotg->plat = dev_get_platdata(hsotg->dev);  in dwc2_lowlevel_hw_init()
275 	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");  in dwc2_lowlevel_hw_init()
276 	if (IS_ERR(hsotg->clk)) {  in dwc2_lowlevel_hw_init()
277 		dev_err(hsotg->dev, "cannot get otg clock\n");  in dwc2_lowlevel_hw_init()
278 		return PTR_ERR(hsotg->clk);  in dwc2_lowlevel_hw_init()
282 	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)  in dwc2_lowlevel_hw_init()
283 		hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];  in dwc2_lowlevel_hw_init()
285 	ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies),  in dwc2_lowlevel_hw_init()
286 				      hsotg->supplies);  in dwc2_lowlevel_hw_init()
288 		dev_err(hsotg->dev, "failed to request supplies: %d\n", ret);  in dwc2_lowlevel_hw_init()
307 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_remove()  local
309 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_remove()
310 	if (hsotg->hcd_enabled)  in dwc2_driver_remove()
311 		dwc2_hcd_remove(hsotg);  in dwc2_driver_remove()
312 	if (hsotg->gadget_enabled)  in dwc2_driver_remove()
313 		dwc2_hsotg_remove(hsotg);  in dwc2_driver_remove()
315 	if (hsotg->ll_hw_enabled)  in dwc2_driver_remove()
316 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_remove()
318 	reset_control_assert(hsotg->reset);  in dwc2_driver_remove()
319 	reset_control_assert(hsotg->reset_ecc);  in dwc2_driver_remove()
338 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_shutdown()  local
340 	disable_irq(hsotg->irq);  in dwc2_driver_shutdown()
348 static bool dwc2_check_core_endianness(struct dwc2_hsotg *hsotg)  in dwc2_check_core_endianness()  argument
352 	snpsid = ioread32(hsotg->regs + GSNPSID);  in dwc2_check_core_endianness()
374 	struct dwc2_hsotg *hsotg;  in dwc2_driver_probe()  local
378 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);  in dwc2_driver_probe()
379 	if (!hsotg)  in dwc2_driver_probe()
382 	hsotg->dev = &dev->dev;  in dwc2_driver_probe()
396 	hsotg->regs = devm_ioremap_resource(&dev->dev, res);  in dwc2_driver_probe()
397 	if (IS_ERR(hsotg->regs))  in dwc2_driver_probe()
398 		return PTR_ERR(hsotg->regs);  in dwc2_driver_probe()
401 		(unsigned long)res->start, hsotg->regs);  in dwc2_driver_probe()
403 	retval = dwc2_lowlevel_hw_init(hsotg);  in dwc2_driver_probe()
407 	spin_lock_init(&hsotg->lock);  in dwc2_driver_probe()
409 	hsotg->irq = platform_get_irq(dev, 0);  in dwc2_driver_probe()
410 	if (hsotg->irq < 0)  in dwc2_driver_probe()
411 		return hsotg->irq;  in dwc2_driver_probe()
413 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",  in dwc2_driver_probe()
414 		hsotg->irq);  in dwc2_driver_probe()
415 	retval = devm_request_irq(hsotg->dev, hsotg->irq,  in dwc2_driver_probe()
417 				  dev_name(hsotg->dev), hsotg);  in dwc2_driver_probe()
421 	hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");  in dwc2_driver_probe()
422 	if (IS_ERR(hsotg->vbus_supply)) {  in dwc2_driver_probe()
423 		retval = PTR_ERR(hsotg->vbus_supply);  in dwc2_driver_probe()
424 		hsotg->vbus_supply = NULL;  in dwc2_driver_probe()
429 	retval = dwc2_lowlevel_hw_enable(hsotg);  in dwc2_driver_probe()
433 	hsotg->needs_byte_swap = dwc2_check_core_endianness(hsotg);  in dwc2_driver_probe()
435 	retval = dwc2_get_dr_mode(hsotg);  in dwc2_driver_probe()
439 	hsotg->need_phy_for_wake =  in dwc2_driver_probe()
447 	retval = dwc2_core_reset(hsotg, false);  in dwc2_driver_probe()
452 	retval = dwc2_get_hwparams(hsotg);  in dwc2_driver_probe()
461 	dwc2_force_dr_mode(hsotg);  in dwc2_driver_probe()
463 	retval = dwc2_init_params(hsotg);  in dwc2_driver_probe()
467 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {  in dwc2_driver_probe()
468 		retval = dwc2_gadget_init(hsotg);  in dwc2_driver_probe()
471 		hsotg->gadget_enabled = 1;  in dwc2_driver_probe()
479 	if (hsotg->need_phy_for_wake)  in dwc2_driver_probe()
482 	hsotg->reset_phy_on_wake =  in dwc2_driver_probe()
485 	if (hsotg->reset_phy_on_wake && !hsotg->phy) {  in dwc2_driver_probe()
486 		dev_warn(hsotg->dev,  in dwc2_driver_probe()
488 		hsotg->reset_phy_on_wake = false;  in dwc2_driver_probe()
491 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {  in dwc2_driver_probe()
492 		retval = dwc2_hcd_init(hsotg);  in dwc2_driver_probe()
494 			if (hsotg->gadget_enabled)  in dwc2_driver_probe()
495 				dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
498 		hsotg->hcd_enabled = 1;  in dwc2_driver_probe()
501 	platform_set_drvdata(dev, hsotg);  in dwc2_driver_probe()
502 	hsotg->hibernated = 0;  in dwc2_driver_probe()
504 	dwc2_debugfs_init(hsotg);  in dwc2_driver_probe()
507 	if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
508 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()
513 	dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()