1 // SPDX-License-Identifier: GPL-2.0+
3  * dwc3-st.c Support for dwc3 platform devices on ST Microelectronics platforms
14  * Inspired by dwc3-omap.c and dwc3-exynos.c.
79  * struct st_dwc3 - dwc3-st driver private structure
114  * OTG and dual role are not yet supported!
121 	err = regmap_read(dwc3_data->regmap, dwc3_data->syscfg_reg_off, &val);  in st_dwc3_drd_init()
127 	switch (dwc3_data->dr_mode) {  in st_dwc3_drd_init()
162 		dev_err(dwc3_data->dev, "Unsupported mode of operation %d\n",  in st_dwc3_drd_init()
163 			dwc3_data->dr_mode);  in st_dwc3_drd_init()
164 		return -EINVAL;  in st_dwc3_drd_init()
167 	return regmap_write(dwc3_data->regmap, dwc3_data->syscfg_reg_off, val);  in st_dwc3_drd_init()
176 	u32 reg = st_dwc3_readl(dwc3_data->glue_base, CLKRST_CTRL);  in st_dwc3_init()
180 	st_dwc3_writel(dwc3_data->glue_base, CLKRST_CTRL, reg);  in st_dwc3_init()
182 	/* configure mux for vbus, powerpresent and bvalid signals */  in st_dwc3_init()
183 	reg = st_dwc3_readl(dwc3_data->glue_base, USB2_VBUS_MNGMNT_SEL1);  in st_dwc3_init()
189 	st_dwc3_writel(dwc3_data->glue_base, USB2_VBUS_MNGMNT_SEL1, reg);  in st_dwc3_init()
191 	reg = st_dwc3_readl(dwc3_data->glue_base, CLKRST_CTRL);  in st_dwc3_init()
193 	st_dwc3_writel(dwc3_data->glue_base, CLKRST_CTRL, reg);  in st_dwc3_init()
200 	struct device *dev = &pdev->dev;  in st_dwc3_probe()
201 	struct device_node *node = dev->of_node;  in st_dwc3_probe()
208 		return -ENOMEM;  in st_dwc3_probe()
210 	dwc3_data->glue_base =  in st_dwc3_probe()
211 		devm_platform_ioremap_resource_byname(pdev, "reg-glue");  in st_dwc3_probe()
212 	if (IS_ERR(dwc3_data->glue_base))  in st_dwc3_probe()
213 		return PTR_ERR(dwc3_data->glue_base);  in st_dwc3_probe()
219 	dwc3_data->dev = dev;  in st_dwc3_probe()
220 	dwc3_data->regmap = regmap;  in st_dwc3_probe()
222 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "syscfg-reg");  in st_dwc3_probe()
224 		return -ENXIO;  in st_dwc3_probe()
226 	dwc3_data->syscfg_reg_off = res->start;  in st_dwc3_probe()
228 	dev_vdbg(dev, "glue-logic addr 0x%pK, syscfg-reg offset 0x%x\n",  in st_dwc3_probe()
229 		 dwc3_data->glue_base, dwc3_data->syscfg_reg_off);  in st_dwc3_probe()
235 		return -ENODEV;  in st_dwc3_probe()
238 	dwc3_data->rstc_pwrdn =  in st_dwc3_probe()
240 	if (IS_ERR(dwc3_data->rstc_pwrdn))  in st_dwc3_probe()
241 		return dev_err_probe(dev, PTR_ERR(dwc3_data->rstc_pwrdn),  in st_dwc3_probe()
245 	reset_control_deassert(dwc3_data->rstc_pwrdn);  in st_dwc3_probe()
247 	dwc3_data->rstc_rst =  in st_dwc3_probe()
249 	if (IS_ERR(dwc3_data->rstc_rst)) {  in st_dwc3_probe()
250 		ret = dev_err_probe(dev, PTR_ERR(dwc3_data->rstc_rst),  in st_dwc3_probe()
256 	reset_control_deassert(dwc3_data->rstc_rst);  in st_dwc3_probe()
268 		ret = -ENODEV;  in st_dwc3_probe()
272 	dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);  in st_dwc3_probe()
279 	 * as soon as OTG is available.  in st_dwc3_probe()
296 	reset_control_assert(dwc3_data->rstc_rst);  in st_dwc3_probe()
298 	reset_control_assert(dwc3_data->rstc_pwrdn);  in st_dwc3_probe()
306 	of_platform_depopulate(&pdev->dev);  in st_dwc3_remove()
308 	reset_control_assert(dwc3_data->rstc_pwrdn);  in st_dwc3_remove()
309 	reset_control_assert(dwc3_data->rstc_rst);  in st_dwc3_remove()
317 	reset_control_assert(dwc3_data->rstc_pwrdn);  in st_dwc3_suspend()
318 	reset_control_assert(dwc3_data->rstc_rst);  in st_dwc3_suspend()
332 	reset_control_deassert(dwc3_data->rstc_pwrdn);  in st_dwc3_resume()
333 	reset_control_deassert(dwc3_data->rstc_rst);  in st_dwc3_resume()
351 	{ .compatible = "st,stih407-dwc3" },
361 		.name = "usb-st-dwc3",