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()
126 	struct dwc2_hsotg *hsotg = data;  in __dwc2_disable_regulators()  local
128 	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);  in __dwc2_disable_regulators()
131 static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_enable()  argument
133 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_enable()
136 	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),  in __dwc2_lowlevel_hw_enable()
137 				    hsotg->supplies);  in __dwc2_lowlevel_hw_enable()
142 				       __dwc2_disable_regulators, hsotg);  in __dwc2_lowlevel_hw_enable()
146 	if (hsotg->clk) {  in __dwc2_lowlevel_hw_enable()
147 		ret = clk_prepare_enable(hsotg->clk);  in __dwc2_lowlevel_hw_enable()
152 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_enable()
153 		ret = usb_phy_init(hsotg->uphy);  in __dwc2_lowlevel_hw_enable()
154 	} else if (hsotg->plat && hsotg->plat->phy_init) {  in __dwc2_lowlevel_hw_enable()
155 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_enable()
157 		ret = phy_power_on(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
159 			ret = phy_init(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
172 int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_enable()  argument
174 	int ret = __dwc2_lowlevel_hw_enable(hsotg);  in dwc2_lowlevel_hw_enable()
177 		hsotg->ll_hw_enabled = true;  in dwc2_lowlevel_hw_enable()
181 static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_disable()  argument
183 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_disable()
186 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_disable()
187 		usb_phy_shutdown(hsotg->uphy);  in __dwc2_lowlevel_hw_disable()
188 	} else if (hsotg->plat && hsotg->plat->phy_exit) {  in __dwc2_lowlevel_hw_disable()
189 		ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_disable()
191 		ret = phy_exit(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
193 			ret = phy_power_off(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
198 	if (hsotg->clk)  in __dwc2_lowlevel_hw_disable()
199 		clk_disable_unprepare(hsotg->clk);  in __dwc2_lowlevel_hw_disable()
211 int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_disable()  argument
213 	int ret = __dwc2_lowlevel_hw_disable(hsotg);  in dwc2_lowlevel_hw_disable()
216 		hsotg->ll_hw_enabled = false;  in dwc2_lowlevel_hw_disable()
220 static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_init()  argument
224 	hsotg->reset = devm_reset_control_get_optional(hsotg->dev, "dwc2");  in dwc2_lowlevel_hw_init()
225 	if (IS_ERR(hsotg->reset)) {  in dwc2_lowlevel_hw_init()
226 		ret = PTR_ERR(hsotg->reset);  in dwc2_lowlevel_hw_init()
227 		dev_err(hsotg->dev, "error getting reset control %d\n", ret);  in dwc2_lowlevel_hw_init()
231 	reset_control_deassert(hsotg->reset);  in dwc2_lowlevel_hw_init()
233 	hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev, "dwc2-ecc");  in dwc2_lowlevel_hw_init()
234 	if (IS_ERR(hsotg->reset_ecc)) {  in dwc2_lowlevel_hw_init()
235 		ret = PTR_ERR(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
236 		dev_err(hsotg->dev, "error getting reset control for ecc %d\n", ret);  in dwc2_lowlevel_hw_init()
240 	reset_control_deassert(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
246 	hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");  in dwc2_lowlevel_hw_init()
247 	if (IS_ERR(hsotg->phy)) {  in dwc2_lowlevel_hw_init()
248 		ret = PTR_ERR(hsotg->phy);  in dwc2_lowlevel_hw_init()
252 			hsotg->phy = NULL;  in dwc2_lowlevel_hw_init()
257 			dev_err(hsotg->dev, "error getting phy %d\n", ret);  in dwc2_lowlevel_hw_init()
262 	if (!hsotg->phy) {  in dwc2_lowlevel_hw_init()
263 		hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);  in dwc2_lowlevel_hw_init()
264 		if (IS_ERR(hsotg->uphy)) {  in dwc2_lowlevel_hw_init()
265 			ret = PTR_ERR(hsotg->uphy);  in dwc2_lowlevel_hw_init()
269 				hsotg->uphy = NULL;  in dwc2_lowlevel_hw_init()
274 				dev_err(hsotg->dev, "error getting usb phy %d\n",  in dwc2_lowlevel_hw_init()
281 	hsotg->plat = dev_get_platdata(hsotg->dev);  in dwc2_lowlevel_hw_init()
284 	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");  in dwc2_lowlevel_hw_init()
285 	if (IS_ERR(hsotg->clk)) {  in dwc2_lowlevel_hw_init()
286 		dev_err(hsotg->dev, "cannot get otg clock\n");  in dwc2_lowlevel_hw_init()
287 		return PTR_ERR(hsotg->clk);  in dwc2_lowlevel_hw_init()
291 	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)  in dwc2_lowlevel_hw_init()
292 		hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];  in dwc2_lowlevel_hw_init()
294 	ret = devm_regulator_bulk_get(hsotg->dev, ARRAY_SIZE(hsotg->supplies),  in dwc2_lowlevel_hw_init()
295 				      hsotg->supplies);  in dwc2_lowlevel_hw_init()
298 			dev_err(hsotg->dev, "failed to request supplies: %d\n",  in dwc2_lowlevel_hw_init()
318 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_remove()  local
322 	gr = &hsotg->gr_backup;  in dwc2_driver_remove()
325 	if (hsotg->hibernated) {  in dwc2_driver_remove()
327 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 1);  in dwc2_driver_remove()
329 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 0);  in dwc2_driver_remove()
332 			dev_err(hsotg->dev,  in dwc2_driver_remove()
337 	if (hsotg->in_ppd) {  in dwc2_driver_remove()
338 		ret = dwc2_exit_partial_power_down(hsotg, 0, true);  in dwc2_driver_remove()
340 			dev_err(hsotg->dev,  in dwc2_driver_remove()
345 	if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE &&  in dwc2_driver_remove()
346 	    hsotg->bus_suspended) {  in dwc2_driver_remove()
347 		if (dwc2_is_device_mode(hsotg))  in dwc2_driver_remove()
348 			dwc2_gadget_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
350 			dwc2_host_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
353 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_remove()
354 	if (hsotg->hcd_enabled)  in dwc2_driver_remove()
355 		dwc2_hcd_remove(hsotg);  in dwc2_driver_remove()
356 	if (hsotg->gadget_enabled)  in dwc2_driver_remove()
357 		dwc2_hsotg_remove(hsotg);  in dwc2_driver_remove()
359 	dwc2_drd_exit(hsotg);  in dwc2_driver_remove()
361 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_remove()
362 		regulator_disable(hsotg->usb33d);  in dwc2_driver_remove()
364 	if (hsotg->ll_hw_enabled)  in dwc2_driver_remove()
365 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_remove()
367 	reset_control_assert(hsotg->reset);  in dwc2_driver_remove()
368 	reset_control_assert(hsotg->reset_ecc);  in dwc2_driver_remove()
387 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_shutdown()  local
389 	dwc2_disable_global_interrupts(hsotg);  in dwc2_driver_shutdown()
390 	synchronize_irq(hsotg->irq);  in dwc2_driver_shutdown()
398 static bool dwc2_check_core_endianness(struct dwc2_hsotg *hsotg)  in dwc2_check_core_endianness()  argument
402 	snpsid = ioread32(hsotg->regs + GSNPSID);  in dwc2_check_core_endianness()
416 int dwc2_check_core_version(struct dwc2_hsotg *hsotg)  in dwc2_check_core_version()  argument
418 	struct dwc2_hw_params *hw = &hsotg->hw_params;  in dwc2_check_core_version()
426 	hw->snpsid = dwc2_readl(hsotg, GSNPSID);  in dwc2_check_core_version()
430 		dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",  in dwc2_check_core_version()
435 	dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",  in dwc2_check_core_version()
455 	struct dwc2_hsotg *hsotg;  in dwc2_driver_probe()  local
459 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);  in dwc2_driver_probe()
460 	if (!hsotg)  in dwc2_driver_probe()
463 	hsotg->dev = &dev->dev;  in dwc2_driver_probe()
476 	hsotg->regs = devm_platform_get_and_ioremap_resource(dev, 0, &res);  in dwc2_driver_probe()
477 	if (IS_ERR(hsotg->regs))  in dwc2_driver_probe()
478 		return PTR_ERR(hsotg->regs);  in dwc2_driver_probe()
481 		(unsigned long)res->start, hsotg->regs);  in dwc2_driver_probe()
483 	retval = dwc2_lowlevel_hw_init(hsotg);  in dwc2_driver_probe()
487 	spin_lock_init(&hsotg->lock);  in dwc2_driver_probe()
489 	hsotg->irq = platform_get_irq(dev, 0);  in dwc2_driver_probe()
490 	if (hsotg->irq < 0)  in dwc2_driver_probe()
491 		return hsotg->irq;  in dwc2_driver_probe()
493 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",  in dwc2_driver_probe()
494 		hsotg->irq);  in dwc2_driver_probe()
495 	retval = devm_request_irq(hsotg->dev, hsotg->irq,  in dwc2_driver_probe()
497 				  dev_name(hsotg->dev), hsotg);  in dwc2_driver_probe()
501 	hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");  in dwc2_driver_probe()
502 	if (IS_ERR(hsotg->vbus_supply)) {  in dwc2_driver_probe()
503 		retval = PTR_ERR(hsotg->vbus_supply);  in dwc2_driver_probe()
504 		hsotg->vbus_supply = NULL;  in dwc2_driver_probe()
509 	retval = dwc2_lowlevel_hw_enable(hsotg);  in dwc2_driver_probe()
513 	hsotg->needs_byte_swap = dwc2_check_core_endianness(hsotg);  in dwc2_driver_probe()
515 	retval = dwc2_get_dr_mode(hsotg);  in dwc2_driver_probe()
519 	hsotg->need_phy_for_wake =  in dwc2_driver_probe()
527 	retval = dwc2_check_core_version(hsotg);  in dwc2_driver_probe()
535 	retval = dwc2_core_reset(hsotg, false);  in dwc2_driver_probe()
540 	retval = dwc2_get_hwparams(hsotg);  in dwc2_driver_probe()
549 	dwc2_force_dr_mode(hsotg);  in dwc2_driver_probe()
551 	retval = dwc2_init_params(hsotg);  in dwc2_driver_probe()
555 	if (hsotg->params.activate_stm_id_vb_detection) {  in dwc2_driver_probe()
558 		hsotg->usb33d = devm_regulator_get(hsotg->dev, "usb33d");  in dwc2_driver_probe()
559 		if (IS_ERR(hsotg->usb33d)) {  in dwc2_driver_probe()
560 			retval = PTR_ERR(hsotg->usb33d);  in dwc2_driver_probe()
562 				dev_err(hsotg->dev,  in dwc2_driver_probe()
567 		retval = regulator_enable(hsotg->usb33d);  in dwc2_driver_probe()
569 			dev_err(hsotg->dev,  in dwc2_driver_probe()
574 		ggpio = dwc2_readl(hsotg, GGPIO);  in dwc2_driver_probe()
577 		dwc2_writel(hsotg, ggpio, GGPIO);  in dwc2_driver_probe()
580 	retval = dwc2_drd_init(hsotg);  in dwc2_driver_probe()
583 			dev_err(hsotg->dev, "failed to initialize dual-role\n");  in dwc2_driver_probe()
587 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {  in dwc2_driver_probe()
588 		retval = dwc2_gadget_init(hsotg);  in dwc2_driver_probe()
591 		hsotg->gadget_enabled = 1;  in dwc2_driver_probe()
599 	if (hsotg->need_phy_for_wake)  in dwc2_driver_probe()
602 	hsotg->reset_phy_on_wake =  in dwc2_driver_probe()
605 	if (hsotg->reset_phy_on_wake && !hsotg->phy) {  in dwc2_driver_probe()
606 		dev_warn(hsotg->dev,  in dwc2_driver_probe()
608 		hsotg->reset_phy_on_wake = false;  in dwc2_driver_probe()
611 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {  in dwc2_driver_probe()
612 		retval = dwc2_hcd_init(hsotg);  in dwc2_driver_probe()
614 			if (hsotg->gadget_enabled)  in dwc2_driver_probe()
615 				dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
618 		hsotg->hcd_enabled = 1;  in dwc2_driver_probe()
621 	platform_set_drvdata(dev, hsotg);  in dwc2_driver_probe()
622 	hsotg->hibernated = 0;  in dwc2_driver_probe()
624 	dwc2_debugfs_init(hsotg);  in dwc2_driver_probe()
627 	if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
628 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()
633 	if (hsotg->gadget_enabled) {  in dwc2_driver_probe()
634 		retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);  in dwc2_driver_probe()
636 			hsotg->gadget.udc = NULL;  in dwc2_driver_probe()
637 			dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
647 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_probe()
648 	if (hsotg->hcd_enabled)  in dwc2_driver_probe()
649 		dwc2_hcd_remove(hsotg);  in dwc2_driver_probe()
652 	dwc2_drd_exit(hsotg);  in dwc2_driver_probe()
655 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_probe()
656 		regulator_disable(hsotg->usb33d);  in dwc2_driver_probe()
658 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
659 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()