1 // SPDX-License-Identifier: GPL-2.0
3  * dwc3-xilinx.c - Xilinx DWC3 controller specific glue driver
12 #include <linux/clk.h>
15 #include <linux/dma-mapping.h>
22 #include <linux/firmware/xlnx-zynqmp.h>
35 /* Versal USB Reset ID */
62 	reg = readl(priv_data->regs + XLNX_USB_PHY_RST_EN);  in dwc3_xlnx_mask_phy_rst()
69 	writel(reg, priv_data->regs + XLNX_USB_PHY_RST_EN);  in dwc3_xlnx_mask_phy_rst()
74 	struct device		*dev = priv_data->dev;  in dwc3_xlnx_init_versal()
79 	/* Assert and De-assert reset */  in dwc3_xlnx_init_versal()
90 		dev_err_probe(dev, ret, "failed to De-assert Reset\n");  in dwc3_xlnx_init_versal()
101 	struct device		*dev = priv_data->dev;  in dwc3_xlnx_init_zynqmp()
107 	priv_data->usb3_phy = devm_phy_optional_get(dev, "usb3-phy");  in dwc3_xlnx_init_zynqmp()
108 	if (IS_ERR(priv_data->usb3_phy)) {  in dwc3_xlnx_init_zynqmp()
109 		ret = PTR_ERR(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
119 	 * by the first-stage boot loader, but may be reverted by a core  in dwc3_xlnx_init_zynqmp()
121 	 * in use but the usb3-phy entry is missing from the device tree.  in dwc3_xlnx_init_zynqmp()
124 	if (!priv_data->usb3_phy) {  in dwc3_xlnx_init_zynqmp()
126 		writel(PIPE_CLK_DESELECT, priv_data->regs + XLNX_USB_FPD_PIPE_CLK);  in dwc3_xlnx_init_zynqmp()
172 	ret = phy_init(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
174 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
185 	writel(FPD_POWER_PRSNT_OPTION, priv_data->regs + XLNX_USB_FPD_POWER_PRSNT);  in dwc3_xlnx_init_zynqmp()
188 	writel(PIPE_CLK_SELECT, priv_data->regs + XLNX_USB_FPD_PIPE_CLK);  in dwc3_xlnx_init_zynqmp()
202 	ret = phy_power_on(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
204 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
209 	/* ulpi reset via gpio-modepin or gpio-framework driver */  in dwc3_xlnx_init_zynqmp()
229 	if (of_dma_is_coherent(dev->of_node) || device_iommu_mapped(dev)) {  in dwc3_xlnx_init_zynqmp()
230 		reg = readl(priv_data->regs + XLNX_USB_TRAFFIC_ROUTE_CONFIG);  in dwc3_xlnx_init_zynqmp()
232 		writel(reg, priv_data->regs + XLNX_USB_TRAFFIC_ROUTE_CONFIG);  in dwc3_xlnx_init_zynqmp()
241 		.compatible = "xlnx,zynqmp-dwc3",
245 		.compatible = "xlnx,versal-dwc3",
255 	struct device			*dev = &pdev->dev;  in dwc3_xlnx_probe()
256 	struct device_node		*np = dev->of_node;  in dwc3_xlnx_probe()
263 		return -ENOMEM;  in dwc3_xlnx_probe()
272 	match = of_match_node(dwc3_xlnx_of_match, pdev->dev.of_node);  in dwc3_xlnx_probe()
274 	priv_data->pltfm_init = match->data;  in dwc3_xlnx_probe()
275 	priv_data->regs = regs;  in dwc3_xlnx_probe()
276 	priv_data->dev = dev;  in dwc3_xlnx_probe()
280 	ret = devm_clk_bulk_get_all(priv_data->dev, &priv_data->clks);  in dwc3_xlnx_probe()
284 	priv_data->num_clocks = ret;  in dwc3_xlnx_probe()
286 	ret = clk_bulk_prepare_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_probe()
290 	ret = priv_data->pltfm_init(priv_data);  in dwc3_xlnx_probe()
306 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_probe()
314 	struct device		*dev = &pdev->dev;  in dwc3_xlnx_remove()
318 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_remove()
319 	priv_data->num_clocks = 0;  in dwc3_xlnx_remove()
330 	clk_bulk_disable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_runtime_suspend()
339 	return clk_bulk_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_runtime_resume()
354 	phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_suspend()
357 	clk_bulk_disable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_suspend()
367 	ret = clk_bulk_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_resume()
371 	ret = phy_init(priv_data->usb3_phy);  in dwc3_xlnx_resume()
375 	ret = phy_power_on(priv_data->usb3_phy);  in dwc3_xlnx_resume()
377 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_resume()
394 		.name		= "dwc3-xilinx",