52 static int dwc2_get_dr_mode(struct dwc2_hsotg *hsotg)  in dwc2_get_dr_mode()  argument
56 	hsotg->dr_mode = usb_get_dr_mode(hsotg->dev);  in dwc2_get_dr_mode()
57 	if (hsotg->dr_mode == USB_DR_MODE_UNKNOWN)  in dwc2_get_dr_mode()
58 		hsotg->dr_mode = USB_DR_MODE_OTG;  in dwc2_get_dr_mode()
60 	mode = hsotg->dr_mode;  in dwc2_get_dr_mode()
62 	if (dwc2_hw_is_device(hsotg)) {  in dwc2_get_dr_mode()
64 			dev_err(hsotg->dev,  in dwc2_get_dr_mode()
69 	} else if (dwc2_hw_is_host(hsotg)) {  in dwc2_get_dr_mode()
71 			dev_err(hsotg->dev,  in dwc2_get_dr_mode()
83 	if (mode != hsotg->dr_mode) {  in dwc2_get_dr_mode()
84 		dev_warn(hsotg->dev,  in dwc2_get_dr_mode()
88 		hsotg->dr_mode = mode;  in dwc2_get_dr_mode()
96 	struct dwc2_hsotg *hsotg = data;  in __dwc2_disable_regulators()  local
98 	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);  in __dwc2_disable_regulators()
101 static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_enable()  argument
103 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_enable()
106 	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),  in __dwc2_lowlevel_hw_enable()
107 				    hsotg->supplies);  in __dwc2_lowlevel_hw_enable()
112 				       __dwc2_disable_regulators, hsotg);  in __dwc2_lowlevel_hw_enable()
116 	if (hsotg->clk) {  in __dwc2_lowlevel_hw_enable()
117 		ret = clk_prepare_enable(hsotg->clk);  in __dwc2_lowlevel_hw_enable()
122 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_enable()
123 		ret = usb_phy_init(hsotg->uphy);  in __dwc2_lowlevel_hw_enable()
124 	} else if (hsotg->plat && hsotg->plat->phy_init) {  in __dwc2_lowlevel_hw_enable()
125 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_enable()
127 		ret = phy_init(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
129 			ret = phy_power_on(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
142 int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_enable()  argument
144 	int ret = __dwc2_lowlevel_hw_enable(hsotg);  in dwc2_lowlevel_hw_enable()
147 		hsotg->ll_hw_enabled = true;  in dwc2_lowlevel_hw_enable()
151 static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_disable()  argument
153 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_disable()
156 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_disable()
157 		usb_phy_shutdown(hsotg->uphy);  in __dwc2_lowlevel_hw_disable()
158 	} else if (hsotg->plat && hsotg->plat->phy_exit) {  in __dwc2_lowlevel_hw_disable()
159 		ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_disable()
161 		ret = phy_power_off(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
163 			ret = phy_exit(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
168 	if (hsotg->clk)  in __dwc2_lowlevel_hw_disable()
169 		clk_disable_unprepare(hsotg->clk);  in __dwc2_lowlevel_hw_disable()
181 int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_disable()  argument
183 	int ret = __dwc2_lowlevel_hw_disable(hsotg);  in dwc2_lowlevel_hw_disable()
186 		hsotg->ll_hw_enabled = false;  in dwc2_lowlevel_hw_disable()
190 static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_init()  argument
194 	hsotg->reset = devm_reset_control_get_optional(hsotg->dev, "dwc2");  in dwc2_lowlevel_hw_init()
195 	if (IS_ERR(hsotg->reset))  in dwc2_lowlevel_hw_init()
196 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset),  in dwc2_lowlevel_hw_init()
199 	reset_control_deassert(hsotg->reset);  in dwc2_lowlevel_hw_init()
201 	hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev, "dwc2-ecc");  in dwc2_lowlevel_hw_init()
202 	if (IS_ERR(hsotg->reset_ecc))  in dwc2_lowlevel_hw_init()
203 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset_ecc),  in dwc2_lowlevel_hw_init()
206 	reset_control_deassert(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
212 	hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");  in dwc2_lowlevel_hw_init()
213 	if (IS_ERR(hsotg->phy)) {  in dwc2_lowlevel_hw_init()
214 		ret = PTR_ERR(hsotg->phy);  in dwc2_lowlevel_hw_init()
218 			hsotg->phy = NULL;  in dwc2_lowlevel_hw_init()
221 			return dev_err_probe(hsotg->dev, ret, "error getting phy\n");  in dwc2_lowlevel_hw_init()
225 	if (!hsotg->phy) {  in dwc2_lowlevel_hw_init()
226 		hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);  in dwc2_lowlevel_hw_init()
227 		if (IS_ERR(hsotg->uphy)) {  in dwc2_lowlevel_hw_init()
228 			ret = PTR_ERR(hsotg->uphy);  in dwc2_lowlevel_hw_init()
232 				hsotg->uphy = NULL;  in dwc2_lowlevel_hw_init()
235 				return dev_err_probe(hsotg->dev, ret, "error getting usb phy\n");  in dwc2_lowlevel_hw_init()
240 	hsotg->plat = dev_get_platdata(hsotg->dev);  in dwc2_lowlevel_hw_init()
243 	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");  in dwc2_lowlevel_hw_init()
244 	if (IS_ERR(hsotg->clk))  in dwc2_lowlevel_hw_init()
245 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->clk), "cannot get otg clock\n");  in dwc2_lowlevel_hw_init()
248 	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)  in dwc2_lowlevel_hw_init()
249 		hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];  in dwc2_lowlevel_hw_init()
251 	ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies),  in dwc2_lowlevel_hw_init()
252 				      hsotg->supplies);  in dwc2_lowlevel_hw_init()
254 		return dev_err_probe(hsotg->dev, ret, "failed to request supplies\n");  in dwc2_lowlevel_hw_init()
272 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_remove()  local
276 	gr = &hsotg->gr_backup;  in dwc2_driver_remove()
279 	if (hsotg->hibernated) {  in dwc2_driver_remove()
281 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 1);  in dwc2_driver_remove()
283 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 0);  in dwc2_driver_remove()
286 			dev_err(hsotg->dev,  in dwc2_driver_remove()
291 	if (hsotg->in_ppd) {  in dwc2_driver_remove()
292 		ret = dwc2_exit_partial_power_down(hsotg, 0, true);  in dwc2_driver_remove()
294 			dev_err(hsotg->dev,  in dwc2_driver_remove()
299 	if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE &&  in dwc2_driver_remove()
300 	    hsotg->bus_suspended) {  in dwc2_driver_remove()
301 		if (dwc2_is_device_mode(hsotg))  in dwc2_driver_remove()
302 			dwc2_gadget_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
304 			dwc2_host_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
307 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_remove()
308 	if (hsotg->hcd_enabled)  in dwc2_driver_remove()
309 		dwc2_hcd_remove(hsotg);  in dwc2_driver_remove()
310 	if (hsotg->gadget_enabled)  in dwc2_driver_remove()
311 		dwc2_hsotg_remove(hsotg);  in dwc2_driver_remove()
313 	dwc2_drd_exit(hsotg);  in dwc2_driver_remove()
315 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_remove()
316 		regulator_disable(hsotg->usb33d);  in dwc2_driver_remove()
318 	if (hsotg->ll_hw_enabled)  in dwc2_driver_remove()
319 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_remove()
321 	reset_control_assert(hsotg->reset);  in dwc2_driver_remove()
322 	reset_control_assert(hsotg->reset_ecc);  in dwc2_driver_remove()
341 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_shutdown()  local
343 	dwc2_disable_global_interrupts(hsotg);  in dwc2_driver_shutdown()
344 	synchronize_irq(hsotg->irq);  in dwc2_driver_shutdown()
352 static bool dwc2_check_core_endianness(struct dwc2_hsotg *hsotg)  in dwc2_check_core_endianness()  argument
356 	snpsid = ioread32(hsotg->regs + GSNPSID);  in dwc2_check_core_endianness()
370 int dwc2_check_core_version(struct dwc2_hsotg *hsotg)  in dwc2_check_core_version()  argument
372 	struct dwc2_hw_params *hw = &hsotg->hw_params;  in dwc2_check_core_version()
380 	hw->snpsid = dwc2_readl(hsotg, GSNPSID);  in dwc2_check_core_version()
384 		dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",  in dwc2_check_core_version()
389 	dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",  in dwc2_check_core_version()
409 	struct dwc2_hsotg *hsotg;  in dwc2_driver_probe()  local
413 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);  in dwc2_driver_probe()
414 	if (!hsotg)  in dwc2_driver_probe()
417 	hsotg->dev = &dev->dev;  in dwc2_driver_probe()
430 	hsotg->regs = devm_platform_get_and_ioremap_resource(dev, 0, &res);  in dwc2_driver_probe()
431 	if (IS_ERR(hsotg->regs))  in dwc2_driver_probe()
432 		return PTR_ERR(hsotg->regs);  in dwc2_driver_probe()
435 		(unsigned long)res->start, hsotg->regs);  in dwc2_driver_probe()
437 	retval = dwc2_lowlevel_hw_init(hsotg);  in dwc2_driver_probe()
441 	spin_lock_init(&hsotg->lock);  in dwc2_driver_probe()
443 	hsotg->irq = platform_get_irq(dev, 0);  in dwc2_driver_probe()
444 	if (hsotg->irq < 0)  in dwc2_driver_probe()
445 		return hsotg->irq;  in dwc2_driver_probe()
447 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",  in dwc2_driver_probe()
448 		hsotg->irq);  in dwc2_driver_probe()
449 	retval = devm_request_irq(hsotg->dev, hsotg->irq,  in dwc2_driver_probe()
451 				  dev_name(hsotg->dev), hsotg);  in dwc2_driver_probe()
455 	hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");  in dwc2_driver_probe()
456 	if (IS_ERR(hsotg->vbus_supply)) {  in dwc2_driver_probe()
457 		retval = PTR_ERR(hsotg->vbus_supply);  in dwc2_driver_probe()
458 		hsotg->vbus_supply = NULL;  in dwc2_driver_probe()
463 	retval = dwc2_lowlevel_hw_enable(hsotg);  in dwc2_driver_probe()
467 	hsotg->needs_byte_swap = dwc2_check_core_endianness(hsotg);  in dwc2_driver_probe()
469 	retval = dwc2_get_dr_mode(hsotg);  in dwc2_driver_probe()
473 	hsotg->need_phy_for_wake =  in dwc2_driver_probe()
481 	retval = dwc2_check_core_version(hsotg);  in dwc2_driver_probe()
489 	retval = dwc2_core_reset(hsotg, false);  in dwc2_driver_probe()
494 	retval = dwc2_get_hwparams(hsotg);  in dwc2_driver_probe()
503 	dwc2_force_dr_mode(hsotg);  in dwc2_driver_probe()
505 	retval = dwc2_init_params(hsotg);  in dwc2_driver_probe()
509 	if (hsotg->params.activate_stm_id_vb_detection) {  in dwc2_driver_probe()
512 		hsotg->usb33d = devm_regulator_get(hsotg->dev, "usb33d");  in dwc2_driver_probe()
513 		if (IS_ERR(hsotg->usb33d)) {  in dwc2_driver_probe()
514 			retval = PTR_ERR(hsotg->usb33d);  in dwc2_driver_probe()
515 			dev_err_probe(hsotg->dev, retval, "failed to request usb33d supply\n");  in dwc2_driver_probe()
518 		retval = regulator_enable(hsotg->usb33d);  in dwc2_driver_probe()
520 			dev_err_probe(hsotg->dev, retval, "failed to enable usb33d supply\n");  in dwc2_driver_probe()
524 		ggpio = dwc2_readl(hsotg, GGPIO);  in dwc2_driver_probe()
527 		dwc2_writel(hsotg, ggpio, GGPIO);  in dwc2_driver_probe()
533 	retval = dwc2_drd_init(hsotg);  in dwc2_driver_probe()
535 		dev_err_probe(hsotg->dev, retval, "failed to initialize dual-role\n");  in dwc2_driver_probe()
539 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {  in dwc2_driver_probe()
540 		retval = dwc2_gadget_init(hsotg);  in dwc2_driver_probe()
543 		hsotg->gadget_enabled = 1;  in dwc2_driver_probe()
551 	if (hsotg->need_phy_for_wake)  in dwc2_driver_probe()
554 	hsotg->reset_phy_on_wake =  in dwc2_driver_probe()
557 	if (hsotg->reset_phy_on_wake && !hsotg->phy) {  in dwc2_driver_probe()
558 		dev_warn(hsotg->dev,  in dwc2_driver_probe()
560 		hsotg->reset_phy_on_wake = false;  in dwc2_driver_probe()
563 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {  in dwc2_driver_probe()
564 		retval = dwc2_hcd_init(hsotg);  in dwc2_driver_probe()
566 			if (hsotg->gadget_enabled)  in dwc2_driver_probe()
567 				dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
570 		hsotg->hcd_enabled = 1;  in dwc2_driver_probe()
573 	platform_set_drvdata(dev, hsotg);  in dwc2_driver_probe()
574 	hsotg->hibernated = 0;  in dwc2_driver_probe()
576 	dwc2_debugfs_init(hsotg);  in dwc2_driver_probe()
579 	if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
580 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()
585 	if (hsotg->gadget_enabled) {  in dwc2_driver_probe()
586 		retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);  in dwc2_driver_probe()
588 			hsotg->gadget.udc = NULL;  in dwc2_driver_probe()
589 			dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
599 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_probe()
600 	if (hsotg->hcd_enabled)  in dwc2_driver_probe()
601 		dwc2_hcd_remove(hsotg);  in dwc2_driver_probe()
604 	dwc2_drd_exit(hsotg);  in dwc2_driver_probe()
607 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_probe()
608 		regulator_disable(hsotg->usb33d);  in dwc2_driver_probe()
610 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
611 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()