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()
94 static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_enable()  argument
96 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_enable()
99 	ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),  in __dwc2_lowlevel_hw_enable()
100 				    hsotg->supplies);  in __dwc2_lowlevel_hw_enable()
104 	if (hsotg->utmi_clk) {  in __dwc2_lowlevel_hw_enable()
105 		ret = clk_prepare_enable(hsotg->utmi_clk);  in __dwc2_lowlevel_hw_enable()
110 	if (hsotg->clk) {  in __dwc2_lowlevel_hw_enable()
111 		ret = clk_prepare_enable(hsotg->clk);  in __dwc2_lowlevel_hw_enable()
116 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_enable()
117 		ret = usb_phy_init(hsotg->uphy);  in __dwc2_lowlevel_hw_enable()
118 	} else if (hsotg->plat && hsotg->plat->phy_init) {  in __dwc2_lowlevel_hw_enable()
119 		ret = hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_enable()
121 		ret = phy_init(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
123 			ret = phy_power_on(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
125 				phy_exit(hsotg->phy);  in __dwc2_lowlevel_hw_enable()
135 	if (hsotg->clk)  in __dwc2_lowlevel_hw_enable()
136 		clk_disable_unprepare(hsotg->clk);  in __dwc2_lowlevel_hw_enable()
139 	if (hsotg->utmi_clk)  in __dwc2_lowlevel_hw_enable()
140 		clk_disable_unprepare(hsotg->utmi_clk);  in __dwc2_lowlevel_hw_enable()
143 	regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);  in __dwc2_lowlevel_hw_enable()
155 int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_enable()  argument
157 	int ret = __dwc2_lowlevel_hw_enable(hsotg);  in dwc2_lowlevel_hw_enable()
160 		hsotg->ll_hw_enabled = true;  in dwc2_lowlevel_hw_enable()
164 static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in __dwc2_lowlevel_hw_disable()  argument
166 	struct platform_device *pdev = to_platform_device(hsotg->dev);  in __dwc2_lowlevel_hw_disable()
169 	if (hsotg->uphy) {  in __dwc2_lowlevel_hw_disable()
170 		usb_phy_shutdown(hsotg->uphy);  in __dwc2_lowlevel_hw_disable()
171 	} else if (hsotg->plat && hsotg->plat->phy_exit) {  in __dwc2_lowlevel_hw_disable()
172 		ret = hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);  in __dwc2_lowlevel_hw_disable()
174 		ret = phy_power_off(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
176 			ret = phy_exit(hsotg->phy);  in __dwc2_lowlevel_hw_disable()
181 	if (hsotg->clk)  in __dwc2_lowlevel_hw_disable()
182 		clk_disable_unprepare(hsotg->clk);  in __dwc2_lowlevel_hw_disable()
184 	if (hsotg->utmi_clk)  in __dwc2_lowlevel_hw_disable()
185 		clk_disable_unprepare(hsotg->utmi_clk);  in __dwc2_lowlevel_hw_disable()
187 	return regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);  in __dwc2_lowlevel_hw_disable()
197 int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)  in dwc2_lowlevel_hw_disable()  argument
199 	int ret = __dwc2_lowlevel_hw_disable(hsotg);  in dwc2_lowlevel_hw_disable()
202 		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 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset),  in dwc2_lowlevel_hw_init()
220 	reset_control_deassert(hsotg->reset);  in dwc2_lowlevel_hw_init()
221 	ret = devm_add_action_or_reset(hsotg->dev, dwc2_reset_control_assert,  in dwc2_lowlevel_hw_init()
222 				       hsotg->reset);  in dwc2_lowlevel_hw_init()
226 	hsotg->reset_ecc = devm_reset_control_get_optional(hsotg->dev, "dwc2-ecc");  in dwc2_lowlevel_hw_init()
227 	if (IS_ERR(hsotg->reset_ecc))  in dwc2_lowlevel_hw_init()
228 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->reset_ecc),  in dwc2_lowlevel_hw_init()
231 	reset_control_deassert(hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
232 	ret = devm_add_action_or_reset(hsotg->dev, dwc2_reset_control_assert,  in dwc2_lowlevel_hw_init()
233 				       hsotg->reset_ecc);  in dwc2_lowlevel_hw_init()
241 	hsotg->phy = devm_phy_get(hsotg->dev, "usb2-phy");  in dwc2_lowlevel_hw_init()
242 	if (IS_ERR(hsotg->phy)) {  in dwc2_lowlevel_hw_init()
243 		ret = PTR_ERR(hsotg->phy);  in dwc2_lowlevel_hw_init()
247 			hsotg->phy = NULL;  in dwc2_lowlevel_hw_init()
250 			return dev_err_probe(hsotg->dev, ret, "error getting phy\n");  in dwc2_lowlevel_hw_init()
254 	if (!hsotg->phy) {  in dwc2_lowlevel_hw_init()
255 		hsotg->uphy = devm_usb_get_phy(hsotg->dev, USB_PHY_TYPE_USB2);  in dwc2_lowlevel_hw_init()
256 		if (IS_ERR(hsotg->uphy)) {  in dwc2_lowlevel_hw_init()
257 			ret = PTR_ERR(hsotg->uphy);  in dwc2_lowlevel_hw_init()
261 				hsotg->uphy = NULL;  in dwc2_lowlevel_hw_init()
264 				return dev_err_probe(hsotg->dev, ret, "error getting usb phy\n");  in dwc2_lowlevel_hw_init()
269 	hsotg->plat = dev_get_platdata(hsotg->dev);  in dwc2_lowlevel_hw_init()
272 	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");  in dwc2_lowlevel_hw_init()
273 	if (IS_ERR(hsotg->clk))  in dwc2_lowlevel_hw_init()
274 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->clk), "cannot get otg clock\n");  in dwc2_lowlevel_hw_init()
276 	hsotg->utmi_clk = devm_clk_get_optional(hsotg->dev, "utmi");  in dwc2_lowlevel_hw_init()
277 	if (IS_ERR(hsotg->utmi_clk))  in dwc2_lowlevel_hw_init()
278 		return dev_err_probe(hsotg->dev, PTR_ERR(hsotg->utmi_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 		return dev_err_probe(hsotg->dev, ret, "failed to request supplies\n");  in dwc2_lowlevel_hw_init()
306 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_remove()  local
310 	gr = &hsotg->gr_backup;  in dwc2_driver_remove()
313 	if (hsotg->hibernated) {  in dwc2_driver_remove()
315 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 1);  in dwc2_driver_remove()
317 			ret = dwc2_exit_hibernation(hsotg, 0, 0, 0);  in dwc2_driver_remove()
320 			dev_err(hsotg->dev,  in dwc2_driver_remove()
325 	if (hsotg->in_ppd) {  in dwc2_driver_remove()
326 		ret = dwc2_exit_partial_power_down(hsotg, 0, true);  in dwc2_driver_remove()
328 			dev_err(hsotg->dev,  in dwc2_driver_remove()
333 	if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE &&  in dwc2_driver_remove()
334 	    hsotg->bus_suspended) {  in dwc2_driver_remove()
335 		if (dwc2_is_device_mode(hsotg))  in dwc2_driver_remove()
336 			dwc2_gadget_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
338 			dwc2_host_exit_clock_gating(hsotg, 0);  in dwc2_driver_remove()
341 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_remove()
342 	if (hsotg->hcd_enabled)  in dwc2_driver_remove()
343 		dwc2_hcd_remove(hsotg);  in dwc2_driver_remove()
344 	if (hsotg->gadget_enabled)  in dwc2_driver_remove()
345 		dwc2_hsotg_remove(hsotg);  in dwc2_driver_remove()
347 	dwc2_drd_exit(hsotg);  in dwc2_driver_remove()
349 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_remove()
350 		regulator_disable(hsotg->usb33d);  in dwc2_driver_remove()
352 	if (hsotg->ll_hw_enabled)  in dwc2_driver_remove()
353 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_remove()
370 	struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);  in dwc2_driver_shutdown()  local
372 	dwc2_disable_global_interrupts(hsotg);  in dwc2_driver_shutdown()
373 	synchronize_irq(hsotg->irq);  in dwc2_driver_shutdown()
381 static bool dwc2_check_core_endianness(struct dwc2_hsotg *hsotg)  in dwc2_check_core_endianness()  argument
385 	snpsid = ioread32(hsotg->regs + GSNPSID);  in dwc2_check_core_endianness()
399 int dwc2_check_core_version(struct dwc2_hsotg *hsotg)  in dwc2_check_core_version()  argument
401 	struct dwc2_hw_params *hw = &hsotg->hw_params;  in dwc2_check_core_version()
409 	hw->snpsid = dwc2_readl(hsotg, GSNPSID);  in dwc2_check_core_version()
413 		dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",  in dwc2_check_core_version()
418 	dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",  in dwc2_check_core_version()
438 	struct dwc2_hsotg *hsotg;  in dwc2_driver_probe()  local
442 	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);  in dwc2_driver_probe()
443 	if (!hsotg)  in dwc2_driver_probe()
446 	hsotg->dev = &dev->dev;  in dwc2_driver_probe()
459 	hsotg->regs = devm_platform_get_and_ioremap_resource(dev, 0, &res);  in dwc2_driver_probe()
460 	if (IS_ERR(hsotg->regs))  in dwc2_driver_probe()
461 		return PTR_ERR(hsotg->regs);  in dwc2_driver_probe()
464 		(unsigned long)res->start, hsotg->regs);  in dwc2_driver_probe()
466 	retval = dwc2_lowlevel_hw_init(hsotg);  in dwc2_driver_probe()
470 	spin_lock_init(&hsotg->lock);  in dwc2_driver_probe()
472 	hsotg->irq = platform_get_irq(dev, 0);  in dwc2_driver_probe()
473 	if (hsotg->irq < 0)  in dwc2_driver_probe()
474 		return hsotg->irq;  in dwc2_driver_probe()
476 	dev_dbg(hsotg->dev, "registering common handler for irq%d\n",  in dwc2_driver_probe()
477 		hsotg->irq);  in dwc2_driver_probe()
478 	retval = devm_request_irq(hsotg->dev, hsotg->irq,  in dwc2_driver_probe()
480 				  dev_name(hsotg->dev), hsotg);  in dwc2_driver_probe()
484 	hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus");  in dwc2_driver_probe()
485 	if (IS_ERR(hsotg->vbus_supply)) {  in dwc2_driver_probe()
486 		retval = PTR_ERR(hsotg->vbus_supply);  in dwc2_driver_probe()
487 		hsotg->vbus_supply = NULL;  in dwc2_driver_probe()
492 	retval = dwc2_lowlevel_hw_enable(hsotg);  in dwc2_driver_probe()
496 	hsotg->needs_byte_swap = dwc2_check_core_endianness(hsotg);  in dwc2_driver_probe()
498 	retval = dwc2_get_dr_mode(hsotg);  in dwc2_driver_probe()
502 	hsotg->need_phy_for_wake =  in dwc2_driver_probe()
510 	retval = dwc2_check_core_version(hsotg);  in dwc2_driver_probe()
518 	retval = dwc2_core_reset(hsotg, false);  in dwc2_driver_probe()
523 	retval = dwc2_get_hwparams(hsotg);  in dwc2_driver_probe()
532 	dwc2_force_dr_mode(hsotg);  in dwc2_driver_probe()
534 	retval = dwc2_init_params(hsotg);  in dwc2_driver_probe()
538 	if (hsotg->params.activate_stm_id_vb_detection) {  in dwc2_driver_probe()
541 		hsotg->usb33d = devm_regulator_get(hsotg->dev, "usb33d");  in dwc2_driver_probe()
542 		if (IS_ERR(hsotg->usb33d)) {  in dwc2_driver_probe()
543 			retval = PTR_ERR(hsotg->usb33d);  in dwc2_driver_probe()
544 			dev_err_probe(hsotg->dev, retval, "failed to request usb33d supply\n");  in dwc2_driver_probe()
547 		retval = regulator_enable(hsotg->usb33d);  in dwc2_driver_probe()
549 			dev_err_probe(hsotg->dev, retval, "failed to enable usb33d supply\n");  in dwc2_driver_probe()
553 		ggpio = dwc2_readl(hsotg, GGPIO);  in dwc2_driver_probe()
556 		dwc2_writel(hsotg, ggpio, GGPIO);  in dwc2_driver_probe()
562 	retval = dwc2_drd_init(hsotg);  in dwc2_driver_probe()
564 		dev_err_probe(hsotg->dev, retval, "failed to initialize dual-role\n");  in dwc2_driver_probe()
568 	if (hsotg->dr_mode != USB_DR_MODE_HOST) {  in dwc2_driver_probe()
569 		retval = dwc2_gadget_init(hsotg);  in dwc2_driver_probe()
572 		hsotg->gadget_enabled = 1;  in dwc2_driver_probe()
580 	if (hsotg->need_phy_for_wake)  in dwc2_driver_probe()
583 	hsotg->reset_phy_on_wake =  in dwc2_driver_probe()
586 	if (hsotg->reset_phy_on_wake && !hsotg->phy) {  in dwc2_driver_probe()
587 		dev_warn(hsotg->dev,  in dwc2_driver_probe()
589 		hsotg->reset_phy_on_wake = false;  in dwc2_driver_probe()
592 	if (hsotg->dr_mode != USB_DR_MODE_PERIPHERAL) {  in dwc2_driver_probe()
593 		retval = dwc2_hcd_init(hsotg);  in dwc2_driver_probe()
595 			if (hsotg->gadget_enabled)  in dwc2_driver_probe()
596 				dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
599 		hsotg->hcd_enabled = 1;  in dwc2_driver_probe()
602 	platform_set_drvdata(dev, hsotg);  in dwc2_driver_probe()
603 	hsotg->hibernated = 0;  in dwc2_driver_probe()
605 	dwc2_debugfs_init(hsotg);  in dwc2_driver_probe()
608 	if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)  in dwc2_driver_probe()
609 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()
614 	if (hsotg->gadget_enabled) {  in dwc2_driver_probe()
615 		retval = usb_add_gadget_udc(hsotg->dev, &hsotg->gadget);  in dwc2_driver_probe()
617 			hsotg->gadget.udc = NULL;  in dwc2_driver_probe()
618 			dwc2_hsotg_remove(hsotg);  in dwc2_driver_probe()
628 	dwc2_debugfs_exit(hsotg);  in dwc2_driver_probe()
629 	if (hsotg->hcd_enabled)  in dwc2_driver_probe()
630 		dwc2_hcd_remove(hsotg);  in dwc2_driver_probe()
633 	dwc2_drd_exit(hsotg);  in dwc2_driver_probe()
636 	if (hsotg->params.activate_stm_id_vb_detection)  in dwc2_driver_probe()
637 		regulator_disable(hsotg->usb33d);  in dwc2_driver_probe()
639 	if (hsotg->ll_hw_enabled)  in dwc2_driver_probe()
640 		dwc2_lowlevel_hw_disable(hsotg);  in dwc2_driver_probe()