1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * omap-usb2.c - USB PHY, talking to USB controller on TI SoCs.
5  * Copyright (C) 2012-2020 Texas Instruments Incorporated - http://www.ti.com
93  * omap_usb2_set_comparator() - links the comparator present in the system with this phy
108 		return -ENODEV;  in omap_usb2_set_comparator()
111 	phy->comparator = comparator;  in omap_usb2_set_comparator()
118 	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);  in omap_usb_set_vbus()
120 	if (!phy->comparator || !phy->comparator->set_vbus)  in omap_usb_set_vbus()
121 		return -ENODEV;  in omap_usb_set_vbus()
123 	return phy->comparator->set_vbus(phy->comparator, enabled);  in omap_usb_set_vbus()
128 	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);  in omap_usb_start_srp()
130 	if (!phy->comparator || !phy->comparator->start_srp)  in omap_usb_start_srp()
131 		return -ENODEV;  in omap_usb_start_srp()
133 	return phy->comparator->start_srp(phy->comparator);  in omap_usb_start_srp()
138 	otg->host = host;  in omap_usb_set_host()
140 		otg->state = OTG_STATE_UNDEFINED;  in omap_usb_set_host()
148 	otg->gadget = gadget;  in omap_usb_set_peripheral()
150 		otg->state = OTG_STATE_UNDEFINED;  in omap_usb_set_peripheral()
160 	if (!phy->syscon_phy_power) {  in omap_usb_phy_power()
161 		omap_control_phy_power(phy->control_dev, on);  in omap_usb_phy_power()
166 		val = phy->power_on;  in omap_usb_phy_power()
168 		val = phy->power_off;  in omap_usb_phy_power()
170 	ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg,  in omap_usb_phy_power()
171 				 phy->mask, val);  in omap_usb_phy_power()
191 	clk_disable_unprepare(phy->wkupclk);  in omap_usb2_disable_clocks()
192 	if (!IS_ERR(phy->optclk))  in omap_usb2_disable_clocks()
193 		clk_disable_unprepare(phy->optclk);  in omap_usb2_disable_clocks()
202 	ret = clk_prepare_enable(phy->wkupclk);  in omap_usb2_enable_clocks()
204 		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);  in omap_usb2_enable_clocks()
208 	if (!IS_ERR(phy->optclk)) {  in omap_usb2_enable_clocks()
209 		ret = clk_prepare_enable(phy->optclk);  in omap_usb2_enable_clocks()
211 			dev_err(phy->dev, "Failed to enable optclk %d\n", ret);  in omap_usb2_enable_clocks()
219 	clk_disable_unprepare(phy->wkupclk);  in omap_usb2_enable_clocks()
232 	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {  in omap_usb_init()
241 		val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);  in omap_usb_init()
243 		omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);  in omap_usb_init()
246 	if (phy->flags & OMAP_USB2_DISABLE_CHRG_DET) {  in omap_usb_init()
247 		val = omap_usb_readl(phy->phy_base, USB2PHY_CHRG_DET);  in omap_usb_init()
250 		omap_usb_writel(phy->phy_base, USB2PHY_CHRG_DET, val);  in omap_usb_init()
319 		.compatible = "ti,omap-usb2",
323 		.compatible = "ti,omap5-usb2",
327 		.compatible = "ti,dra7x-usb2",
331 		.compatible = "ti,dra7x-usb2-phy2",
335 		.compatible = "ti,am437x-usb2",
339 		.compatible = "ti,am654-usb2",
363 		phy->flags |= OMAP_USB2_DISABLE_CHRG_DET;  in omap_usb2_init_errata()
372 	struct device_node *node = pdev->dev.of_node;  in omap_usb2_probe()
377 	phy_data = device_get_match_data(&pdev->dev);  in omap_usb2_probe()
379 		return -EINVAL;  in omap_usb2_probe()
381 	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);  in omap_usb2_probe()
383 		return -ENOMEM;  in omap_usb2_probe()
385 	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);  in omap_usb2_probe()
387 		return -ENOMEM;  in omap_usb2_probe()
389 	phy->dev		= &pdev->dev;  in omap_usb2_probe()
391 	phy->phy.dev		= phy->dev;  in omap_usb2_probe()
392 	phy->phy.label		= phy_data->label;  in omap_usb2_probe()
393 	phy->phy.otg		= otg;  in omap_usb2_probe()
394 	phy->phy.type		= USB_PHY_TYPE_USB2;  in omap_usb2_probe()
395 	phy->mask		= phy_data->mask;  in omap_usb2_probe()
396 	phy->power_on		= phy_data->power_on;  in omap_usb2_probe()
397 	phy->power_off		= phy_data->power_off;  in omap_usb2_probe()
398 	phy->flags		= phy_data->flags;  in omap_usb2_probe()
402 	phy->phy_base = devm_platform_ioremap_resource(pdev, 0);  in omap_usb2_probe()
403 	if (IS_ERR(phy->phy_base))  in omap_usb2_probe()
404 		return PTR_ERR(phy->phy_base);  in omap_usb2_probe()
406 	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,  in omap_usb2_probe()
407 								"syscon-phy-power");  in omap_usb2_probe()
408 	if (IS_ERR(phy->syscon_phy_power)) {  in omap_usb2_probe()
409 		dev_dbg(&pdev->dev,  in omap_usb2_probe()
410 			"can't get syscon-phy-power, using control device\n");  in omap_usb2_probe()
411 		phy->syscon_phy_power = NULL;  in omap_usb2_probe()
413 		control_node = of_parse_phandle(node, "ctrl-module", 0);  in omap_usb2_probe()
415 			dev_err(&pdev->dev,  in omap_usb2_probe()
417 			return -EINVAL;  in omap_usb2_probe()
422 			dev_err(&pdev->dev, "Failed to get control device\n");  in omap_usb2_probe()
423 			return -EINVAL;  in omap_usb2_probe()
425 		phy->control_dev = &control_pdev->dev;  in omap_usb2_probe()
428 					       "syscon-phy-power", 1,  in omap_usb2_probe()
429 					       &phy->power_reg)) {  in omap_usb2_probe()
430 			dev_err(&pdev->dev,  in omap_usb2_probe()
432 			return -EINVAL;  in omap_usb2_probe()
436 	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");  in omap_usb2_probe()
437 	if (IS_ERR(phy->wkupclk)) {  in omap_usb2_probe()
438 		if (PTR_ERR(phy->wkupclk) == -EPROBE_DEFER)  in omap_usb2_probe()
439 			return -EPROBE_DEFER;  in omap_usb2_probe()
441 		dev_warn(&pdev->dev, "unable to get wkupclk %ld, trying old name\n",  in omap_usb2_probe()
442 			 PTR_ERR(phy->wkupclk));  in omap_usb2_probe()
443 		phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");  in omap_usb2_probe()
445 		if (IS_ERR(phy->wkupclk))  in omap_usb2_probe()
446 			return dev_err_probe(&pdev->dev, PTR_ERR(phy->wkupclk),  in omap_usb2_probe()
449 		dev_warn(&pdev->dev,  in omap_usb2_probe()
453 	phy->optclk = devm_clk_get(phy->dev, "refclk");  in omap_usb2_probe()
454 	if (IS_ERR(phy->optclk)) {  in omap_usb2_probe()
455 		if (PTR_ERR(phy->optclk) == -EPROBE_DEFER)  in omap_usb2_probe()
456 			return -EPROBE_DEFER;  in omap_usb2_probe()
458 		dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n");  in omap_usb2_probe()
459 		phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");  in omap_usb2_probe()
461 		if (IS_ERR(phy->optclk)) {  in omap_usb2_probe()
462 			if (PTR_ERR(phy->optclk) != -EPROBE_DEFER) {  in omap_usb2_probe()
463 				dev_dbg(&pdev->dev,  in omap_usb2_probe()
467 			dev_warn(&pdev->dev,  in omap_usb2_probe()
472 	otg->set_host = omap_usb_set_host;  in omap_usb2_probe()
473 	otg->set_peripheral = omap_usb_set_peripheral;  in omap_usb2_probe()
474 	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)  in omap_usb2_probe()
475 		otg->set_vbus = omap_usb_set_vbus;  in omap_usb2_probe()
476 	if (phy_data->flags & OMAP_USB2_HAS_START_SRP)  in omap_usb2_probe()
477 		otg->start_srp = omap_usb_start_srp;  in omap_usb2_probe()
478 	otg->usb_phy = &phy->phy;  in omap_usb2_probe()
481 	pm_runtime_enable(phy->dev);  in omap_usb2_probe()
483 	generic_phy = devm_phy_create(phy->dev, NULL, &ops);  in omap_usb2_probe()
485 		pm_runtime_disable(phy->dev);  in omap_usb2_probe()
492 	phy_provider = devm_of_phy_provider_register(phy->dev,  in omap_usb2_probe()
495 		pm_runtime_disable(phy->dev);  in omap_usb2_probe()
499 	usb_add_phy_dev(&phy->phy);  in omap_usb2_probe()
508 	usb_remove_phy(&phy->phy);  in omap_usb2_remove()
509 	pm_runtime_disable(phy->dev);  in omap_usb2_remove()
516 		.name	= "omap-usb2",
525 MODULE_DESCRIPTION("OMAP USB2 phy driver");