1 // SPDX-License-Identifier: GPL-2.0
3  * cdns3-ti.c - TI specific Glue layer for Cadence USB Controller
5  * Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com
14 #include <linux/dma-mapping.h>
79 static inline u32 cdns_ti_readl(struct cdns_ti *data, u32 offset)  in cdns_ti_readl()  argument
81 	return readl(data->usbss + offset);  in cdns_ti_readl()
84 static inline void cdns_ti_writel(struct cdns_ti *data, u32 offset, u32 value)  in cdns_ti_writel()  argument
86 	writel(value, data->usbss + offset);  in cdns_ti_writel()
103 	struct device *dev = &pdev->dev;  in cdns_ti_probe()
104 	struct device_node *node = pdev->dev.of_node;  in cdns_ti_probe()
105 	struct cdns_ti *data;  in cdns_ti_probe()  local
107 	u32 reg;  in cdns_ti_probe()  local
111 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);  in cdns_ti_probe()
112 	if (!data)  in cdns_ti_probe()
113 		return -ENOMEM;  in cdns_ti_probe()
115 	platform_set_drvdata(pdev, data);  in cdns_ti_probe()
117 	data->dev = dev;  in cdns_ti_probe()
119 	data->usbss = devm_platform_ioremap_resource(pdev, 0);  in cdns_ti_probe()
120 	if (IS_ERR(data->usbss)) {  in cdns_ti_probe()
122 		return PTR_ERR(data->usbss);  in cdns_ti_probe()
125 	data->usb2_refclk = devm_clk_get(dev, "ref");  in cdns_ti_probe()
126 	if (IS_ERR(data->usb2_refclk)) {  in cdns_ti_probe()
128 		return PTR_ERR(data->usb2_refclk);  in cdns_ti_probe()
131 	data->lpm_clk = devm_clk_get(dev, "lpm");  in cdns_ti_probe()
132 	if (IS_ERR(data->lpm_clk)) {  in cdns_ti_probe()
134 		return PTR_ERR(data->lpm_clk);  in cdns_ti_probe()
137 	rate = clk_get_rate(data->usb2_refclk);  in cdns_ti_probe()
146 		return -EINVAL;  in cdns_ti_probe()
159 	reg = cdns_ti_readl(data, USBSS_W1);  in cdns_ti_probe()
160 	reg &= ~USBSS_W1_PWRUP_RST;  in cdns_ti_probe()
161 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_probe()
164 	reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);  in cdns_ti_probe()
165 	reg &= ~USBSS1_STATIC_PLL_REF_SEL_MASK;  in cdns_ti_probe()
166 	reg |= rate_code << USBSS1_STATIC_PLL_REF_SEL_SHIFT;  in cdns_ti_probe()
168 	reg &= ~USBSS1_STATIC_VBUS_SEL_MASK;  in cdns_ti_probe()
169 	data->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider");  in cdns_ti_probe()
170 	if (data->vbus_divider)  in cdns_ti_probe()
171 		reg |= 1 << USBSS1_STATIC_VBUS_SEL_SHIFT;  in cdns_ti_probe()
173 	cdns_ti_writel(data, USBSS_STATIC_CONFIG, reg);  in cdns_ti_probe()
174 	reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);  in cdns_ti_probe()
177 	reg = cdns_ti_readl(data, USBSS_W1);  in cdns_ti_probe()
178 	data->usb2_only = device_property_read_bool(dev, "ti,usb2-only");  in cdns_ti_probe()
179 	if (data->usb2_only)  in cdns_ti_probe()
180 		reg |= USBSS_W1_USB2_ONLY;  in cdns_ti_probe()
183 	reg |= USBSS_W1_MODESTRAP_SEL;  in cdns_ti_probe()
184 	reg &= ~USBSS_W1_MODESTRAP_MASK;  in cdns_ti_probe()
185 	reg |= USBSS_MODESTRAP_MODE_NONE << USBSS_W1_MODESTRAP_SHIFT;  in cdns_ti_probe()
186 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_probe()
188 	/* de-assert RESET */  in cdns_ti_probe()
189 	reg |= USBSS_W1_PWRUP_RST;  in cdns_ti_probe()
190 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_probe()
201 	pm_runtime_put_sync(data->dev);  in cdns_ti_probe()
202 	pm_runtime_disable(data->dev);  in cdns_ti_probe()
218 	struct device *dev = &pdev->dev;  in cdns_ti_remove()
228 	{ .compatible = "ti,j721e-usb", },
229 	{ .compatible = "ti,am64-usb", },
238 		.name	= "cdns3-ti",
245 MODULE_ALIAS("platform:cdns3-ti");