1 // SPDX-License-Identifier: GPL-2.0
3  * dwc3-keystone.c - Keystone Specific Glue layer
5  * Copyright (C) 2010-2013 Texas Instruments Incorporated - https://www.ti.com
7  * Author: WingMan Kwok <w-kwok2@ti.com>
14 #include <linux/dma-mapping.h>
17 #include <linux/phy/phy.h>
38 	struct phy			*usb3_phy;
55 	val = kdwc3_readl(kdwc->usbss, USBSS_IRQENABLE_SET_0);  in kdwc3_enable_irqs()
57 	kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, val);  in kdwc3_enable_irqs()
64 	val = kdwc3_readl(kdwc->usbss, USBSS_IRQENABLE_SET_0);  in kdwc3_disable_irqs()
66 	kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, val);  in kdwc3_disable_irqs()
73 	kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_CLR_0, USBSS_IRQ_COREIRQ_CLR);  in dwc3_keystone_interrupt()
74 	kdwc3_writel(kdwc->usbss, USBSS_IRQSTATUS_0, USBSS_IRQ_EVENT_ST);  in dwc3_keystone_interrupt()
75 	kdwc3_writel(kdwc->usbss, USBSS_IRQENABLE_SET_0, USBSS_IRQ_COREIRQ_EN);  in dwc3_keystone_interrupt()
76 	kdwc3_writel(kdwc->usbss, USBSS_IRQ_EOI, USBSS_IRQ_EOI_LINE(0));  in dwc3_keystone_interrupt()
83 	struct device		*dev = &pdev->dev;  in kdwc3_probe()
84 	struct device_node	*node = pdev->dev.of_node;  in kdwc3_probe()
90 		return -ENOMEM;  in kdwc3_probe()
94 	kdwc->dev = dev;  in kdwc3_probe()
96 	kdwc->usbss = devm_platform_ioremap_resource(pdev, 0);  in kdwc3_probe()
97 	if (IS_ERR(kdwc->usbss))  in kdwc3_probe()
98 		return PTR_ERR(kdwc->usbss);  in kdwc3_probe()
101 	kdwc->usb3_phy = devm_phy_optional_get(dev, "usb3-phy");  in kdwc3_probe()
102 	if (IS_ERR(kdwc->usb3_phy)) {  in kdwc3_probe()
103 		error = PTR_ERR(kdwc->usb3_phy);  in kdwc3_probe()
104 		if (error != -EPROBE_DEFER)  in kdwc3_probe()
105 			dev_err(dev, "couldn't get usb3 phy: %d\n", error);  in kdwc3_probe()
110 	phy_pm_runtime_get_sync(kdwc->usb3_phy);  in kdwc3_probe()
112 	error = phy_reset(kdwc->usb3_phy);  in kdwc3_probe()
114 		dev_err(dev, "usb3 phy reset failed: %d\n", error);  in kdwc3_probe()
118 	error = phy_init(kdwc->usb3_phy);  in kdwc3_probe()
120 		dev_err(dev, "usb3 phy init failed: %d\n", error);  in kdwc3_probe()
124 	error = phy_power_on(kdwc->usb3_phy);  in kdwc3_probe()
126 		dev_err(dev, "usb3 phy power on failed: %d\n", error);  in kdwc3_probe()
127 		phy_exit(kdwc->usb3_phy);  in kdwc3_probe()
131 	pm_runtime_enable(kdwc->dev);  in kdwc3_probe()
132 	error = pm_runtime_get_sync(kdwc->dev);  in kdwc3_probe()
134 		dev_err(kdwc->dev, "pm_runtime_get_sync failed, error %d\n",  in kdwc3_probe()
140 	if (of_device_is_compatible(node, "ti,am654-dwc3"))  in kdwc3_probe()
152 		dev_err(dev, "failed to request IRQ #%d --> %d\n",  in kdwc3_probe()
162 		dev_err(&pdev->dev, "failed to create dwc3 core\n");  in kdwc3_probe()
171 	pm_runtime_put_sync(kdwc->dev);  in kdwc3_probe()
172 	pm_runtime_disable(kdwc->dev);  in kdwc3_probe()
173 	phy_power_off(kdwc->usb3_phy);  in kdwc3_probe()
174 	phy_exit(kdwc->usb3_phy);  in kdwc3_probe()
175 	phy_pm_runtime_put_sync(kdwc->usb3_phy);  in kdwc3_probe()
192 	struct device_node *node = pdev->dev.of_node;  in kdwc3_remove()
194 	if (!of_device_is_compatible(node, "ti,am654-dwc3"))  in kdwc3_remove()
197 	device_for_each_child(&pdev->dev, NULL, kdwc3_remove_core);  in kdwc3_remove()
198 	pm_runtime_put_sync(kdwc->dev);  in kdwc3_remove()
199 	pm_runtime_disable(kdwc->dev);  in kdwc3_remove()
201 	phy_power_off(kdwc->usb3_phy);  in kdwc3_remove()
202 	phy_exit(kdwc->usb3_phy);  in kdwc3_remove()
203 	phy_pm_runtime_put_sync(kdwc->usb3_phy);  in kdwc3_remove()
211 	{ .compatible = "ti,keystone-dwc3", },
212 	{ .compatible = "ti,am654-dwc3" },
221 		.name	= "keystone-dwc3",
228 MODULE_ALIAS("platform:keystone-dwc3");
229 MODULE_AUTHOR("WingMan Kwok <w-kwok2@ti.com>");
231 MODULE_DESCRIPTION("DesignWare USB3 KEYSTONE Glue Layer");