1 // SPDX-License-Identifier: GPL-2.0+
10 #include <linux/clk.h>
11 #include <linux/dma-mapping.h>
40 	struct clk *clk;  member
46 #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
56 	num_phys = of_count_phandle_with_args(dev->of_node, "phys",  in exynos_ehci_get_phy()
57 					      "#phy-cells");  in exynos_ehci_get_phy()
59 		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);  in exynos_ehci_get_phy()
62 		exynos_ehci->phy[phy_number] = phy;  in exynos_ehci_get_phy()
68 	for_each_available_child_of_node_scoped(dev->of_node, child) {  in exynos_ehci_get_phy()
77 			return -EINVAL;  in exynos_ehci_get_phy()
81 		exynos_ehci->phy[phy_number] = phy;  in exynos_ehci_get_phy()
86 	exynos_ehci->legacy_phy = true;  in exynos_ehci_get_phy()
98 		ret = phy_power_on(exynos_ehci->phy[i]);  in exynos_ehci_phy_enable()
100 		for (i--; i >= 0; i--)  in exynos_ehci_phy_enable()
101 			phy_power_off(exynos_ehci->phy[i]);  in exynos_ehci_phy_enable()
113 		phy_power_off(exynos_ehci->phy[i]);  in exynos_ehci_phy_disable()
137 	 * Right now device-tree probed devices don't get dma_mask set.  in exynos_ehci_probe()
141 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in exynos_ehci_probe()
145 	exynos_setup_vbus_gpio(&pdev->dev);  in exynos_ehci_probe()
148 			     &pdev->dev, dev_name(&pdev->dev));  in exynos_ehci_probe()
150 		dev_err(&pdev->dev, "Unable to create HCD\n");  in exynos_ehci_probe()
151 		return -ENOMEM;  in exynos_ehci_probe()
155 	err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci);  in exynos_ehci_probe()
159 	exynos_ehci->clk = devm_clk_get_enabled(&pdev->dev, "usbhost");  in exynos_ehci_probe()
161 	if (IS_ERR(exynos_ehci->clk)) {  in exynos_ehci_probe()
162 		dev_err(&pdev->dev, "Failed to get usbhost clock\n");  in exynos_ehci_probe()
163 		err = PTR_ERR(exynos_ehci->clk);  in exynos_ehci_probe()
167 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in exynos_ehci_probe()
168 	if (IS_ERR(hcd->regs)) {  in exynos_ehci_probe()
169 		err = PTR_ERR(hcd->regs);  in exynos_ehci_probe()
173 	hcd->rsrc_start = res->start;  in exynos_ehci_probe()
174 	hcd->rsrc_len = resource_size(res);  in exynos_ehci_probe()
182 	err = exynos_ehci_phy_enable(&pdev->dev);  in exynos_ehci_probe()
184 		dev_err(&pdev->dev, "Failed to enable USB phy\n");  in exynos_ehci_probe()
189 	ehci->caps = hcd->regs;  in exynos_ehci_probe()
195 	exynos_ehci->of_node = pdev->dev.of_node;  in exynos_ehci_probe()
196 	if (exynos_ehci->legacy_phy)  in exynos_ehci_probe()
197 		pdev->dev.of_node = NULL;  in exynos_ehci_probe()
199 	/* DMA burst Enable */  in exynos_ehci_probe()
200 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));  in exynos_ehci_probe()
204 		dev_err(&pdev->dev, "Failed to add USB HCD\n");  in exynos_ehci_probe()
207 	device_wakeup_enable(hcd->self.controller);  in exynos_ehci_probe()
214 	exynos_ehci_phy_disable(&pdev->dev);  in exynos_ehci_probe()
215 	pdev->dev.of_node = exynos_ehci->of_node;  in exynos_ehci_probe()
226 	pdev->dev.of_node = exynos_ehci->of_node;  in exynos_ehci_remove()
230 	exynos_ehci_phy_disable(&pdev->dev);  in exynos_ehci_remove()
249 	clk_disable_unprepare(exynos_ehci->clk);  in exynos_ehci_suspend()
260 	ret = clk_prepare_enable(exynos_ehci->clk);  in exynos_ehci_resume()
266 		dev_err(dev, "Failed to enable USB phy\n");  in exynos_ehci_resume()
267 		clk_disable_unprepare(exynos_ehci->clk);  in exynos_ehci_resume()
271 	/* DMA burst Enable */  in exynos_ehci_resume()
272 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));  in exynos_ehci_resume()
283 	{ .compatible = "samsung,exynos4210-ehci" },
294 		.name	= "exynos-ehci",
306 		return -ENODEV;  in ehci_exynos_init()
320 MODULE_ALIAS("platform:exynos-ehci");