1 // SPDX-License-Identifier: GPL-2.0
3  * cdns_ti-ti.c - TI specific Glue layer for Cadence USB Controller
5  * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
9 #include <asm-generic/io.h>
76 static inline u32 cdns_ti_readl(struct cdns_ti *data, u32 offset)  in cdns_ti_readl()  argument
78 	return readl(data->usbss + offset);  in cdns_ti_readl()
81 static inline void cdns_ti_writel(struct cdns_ti *data, u32 offset, u32 value)  in cdns_ti_writel()  argument
83 	writel(value, data->usbss + offset);  in cdns_ti_writel()
88 	struct cdns_ti *data = dev_get_platdata(dev);  in cdns_ti_probe()  local
93 	u32 reg;  in cdns_ti_probe()  local
96 	data->dev = dev;  in cdns_ti_probe()
98 	data->usbss = dev_remap_addr_index(dev, 0);  in cdns_ti_probe()
99 	if (!data->usbss)  in cdns_ti_probe()
100 		return -EINVAL;  in cdns_ti_probe()
117 		return -EINVAL;  in cdns_ti_probe()
123 	reg = cdns_ti_readl(data, USBSS_W1);  in cdns_ti_probe()
124 	reg &= ~USBSS_W1_PWRUP_RST;  in cdns_ti_probe()
125 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_probe()
128 	reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);  in cdns_ti_probe()
129 	reg &= ~USBSS1_STATIC_PLL_REF_SEL_MASK;  in cdns_ti_probe()
130 	reg |= rate_code << USBSS1_STATIC_PLL_REF_SEL_SHIFT;  in cdns_ti_probe()
132 	reg &= ~USBSS1_STATIC_VBUS_SEL_MASK;  in cdns_ti_probe()
133 	data->vbus_divider = dev_read_bool(dev, "ti,vbus-divider");  in cdns_ti_probe()
134 	if (data->vbus_divider)  in cdns_ti_probe()
135 		reg |= 1 << USBSS1_STATIC_VBUS_SEL_SHIFT;  in cdns_ti_probe()
137 	cdns_ti_writel(data, USBSS_STATIC_CONFIG, reg);  in cdns_ti_probe()
138 	reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);  in cdns_ti_probe()
141 	reg = cdns_ti_readl(data, USBSS_W1);  in cdns_ti_probe()
142 	data->usb2_only = dev_read_bool(dev, "ti,usb2-only");  in cdns_ti_probe()
143 	if (data->usb2_only)  in cdns_ti_probe()
144 		reg |= USBSS_W1_USB2_ONLY;  in cdns_ti_probe()
147 	if (dev_read_bool(dev, "ti,modestrap-host"))  in cdns_ti_probe()
149 	else if (dev_read_bool(dev, "ti,modestrap-peripheral"))  in cdns_ti_probe()
154 	reg |= USBSS_W1_MODESTRAP_SEL;  in cdns_ti_probe()
155 	reg &= ~USBSS_W1_MODESTRAP_MASK;  in cdns_ti_probe()
156 	reg |= modestrap_mode << USBSS_W1_MODESTRAP_SHIFT;  in cdns_ti_probe()
157 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_probe()
159 	/* de-assert RESET */  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()
168 	struct cdns_ti *data = dev_get_platdata(dev);  in cdns_ti_remove()  local
169 	u32 reg;  in cdns_ti_remove()  local
172 	reg = cdns_ti_readl(data, USBSS_W1);  in cdns_ti_remove()
173 	reg &= ~USBSS_W1_PWRUP_RST;  in cdns_ti_remove()
174 	cdns_ti_writel(data, USBSS_W1, reg);  in cdns_ti_remove()
180 	{ .compatible = "ti,j721e-usb", },
185 	.name = "cdns-ti",