1 // SPDX-License-Identifier: GPL-2.0
3  * dwc3-xilinx.c - Xilinx DWC3 controller specific glue driver
15 #include <linux/dma-mapping.h>
22 #include <linux/firmware/xlnx-zynqmp.h>
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_set_coherency()
82 	if (of_dma_is_coherent(dev->of_node) || device_iommu_mapped(dev)) {  in dwc3_xlnx_set_coherency()
83 		reg = readl(priv_data->regs + coherency_offset);  in dwc3_xlnx_set_coherency()
85 		writel(reg, priv_data->regs + coherency_offset);  in dwc3_xlnx_set_coherency()
91 	struct device		*dev = priv_data->dev;  in dwc3_xlnx_init_versal()
101 	/* Assert and De-assert reset */  in dwc3_xlnx_init_versal()
110 		dev_err_probe(dev, ret, "failed to De-assert Reset\n");  in dwc3_xlnx_init_versal()
122 	struct device		*dev = priv_data->dev;  in dwc3_xlnx_init_zynqmp()
127 	priv_data->usb3_phy = devm_phy_optional_get(dev, "usb3-phy");  in dwc3_xlnx_init_zynqmp()
128 	if (IS_ERR(priv_data->usb3_phy)) {  in dwc3_xlnx_init_zynqmp()
129 		ret = PTR_ERR(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
139 	 * by the first-stage boot loader, but may be reverted by a core  in dwc3_xlnx_init_zynqmp()
141 	 * in use but the usb3-phy entry is missing from the device tree.  in dwc3_xlnx_init_zynqmp()
144 	if (!priv_data->usb3_phy) {  in dwc3_xlnx_init_zynqmp()
146 		writel(PIPE_CLK_DESELECT, priv_data->regs + XLNX_USB_FPD_PIPE_CLK);  in dwc3_xlnx_init_zynqmp()
192 	ret = phy_init(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
194 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
205 	writel(FPD_POWER_PRSNT_OPTION, priv_data->regs + XLNX_USB_FPD_POWER_PRSNT);  in dwc3_xlnx_init_zynqmp()
208 	writel(PIPE_CLK_SELECT, priv_data->regs + XLNX_USB_FPD_PIPE_CLK);  in dwc3_xlnx_init_zynqmp()
222 	ret = phy_power_on(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
224 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_init_zynqmp()
229 	/* ulpi reset via gpio-modepin or gpio-framework driver */  in dwc3_xlnx_init_zynqmp()
249 		.compatible = "xlnx,zynqmp-dwc3",
253 		.compatible = "xlnx,versal-dwc3",
262 	struct device_node *np = dev->of_node, *dwc3_np;  in dwc3_set_swnode()
266 	dwc3_np = of_get_compatible_child(np, "snps,dwc3");  in dwc3_set_swnode()
268 		ret = -ENODEV;  in dwc3_set_swnode()
269 		dev_err(dev, "failed to find dwc3 core child\n");  in dwc3_set_swnode()
275 		props[prop_idx++] = PROPERTY_ENTRY_U16("snps,gsbuscfg0-reqinfo",  in dwc3_set_swnode()
288 	struct device			*dev = &pdev->dev;  in dwc3_xlnx_probe()
289 	struct device_node		*np = dev->of_node;  in dwc3_xlnx_probe()
296 		return -ENOMEM;  in dwc3_xlnx_probe()
302 	match = of_match_node(dwc3_xlnx_of_match, pdev->dev.of_node);  in dwc3_xlnx_probe()
304 	priv_data->pltfm_init = match->data;  in dwc3_xlnx_probe()
305 	priv_data->regs = regs;  in dwc3_xlnx_probe()
306 	priv_data->dev = dev;  in dwc3_xlnx_probe()
310 	ret = devm_clk_bulk_get_all(priv_data->dev, &priv_data->clks);  in dwc3_xlnx_probe()
314 	priv_data->num_clocks = ret;  in dwc3_xlnx_probe()
316 	ret = clk_bulk_prepare_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_probe()
320 	ret = priv_data->pltfm_init(priv_data);  in dwc3_xlnx_probe()
349 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_probe()
357 	struct device		*dev = &pdev->dev;  in dwc3_xlnx_remove()
361 	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_remove()
362 	priv_data->num_clocks = 0;  in dwc3_xlnx_remove()
372 	clk_bulk_disable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_runtime_suspend()
381 	return clk_bulk_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_runtime_resume()
396 	phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_suspend()
399 	clk_bulk_disable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_suspend()
409 	ret = clk_bulk_enable(priv_data->num_clocks, priv_data->clks);  in dwc3_xlnx_resume()
413 	ret = phy_init(priv_data->usb3_phy);  in dwc3_xlnx_resume()
417 	ret = phy_power_on(priv_data->usb3_phy);  in dwc3_xlnx_resume()
419 		phy_exit(priv_data->usb3_phy);  in dwc3_xlnx_resume()
437 		.name		= "dwc3-xilinx",
446 MODULE_DESCRIPTION("Xilinx DWC3 controller specific glue driver");