1 // SPDX-License-Identifier: GPL-2.0+
3  * SAMSUNG EXYNOS USB HOST OHCI Controller
10 #include <linux/dma-mapping.h>
20 #include "ohci.h"
22 #define DRIVER_DESC "OHCI Exynos driver"
26 #define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
45 	num_phys = of_count_phandle_with_args(dev->of_node, "phys",  in exynos_ohci_get_phy()
46 					      "#phy-cells");  in exynos_ohci_get_phy()
48 		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);  in exynos_ohci_get_phy()
51 		exynos_ohci->phy[phy_number] = phy;  in exynos_ohci_get_phy()
57 	for_each_available_child_of_node_scoped(dev->of_node, child) {  in exynos_ohci_get_phy()
66 			return -EINVAL;  in exynos_ohci_get_phy()
70 		exynos_ohci->phy[phy_number] = phy;  in exynos_ohci_get_phy()
75 	exynos_ohci->legacy_phy = true;  in exynos_ohci_get_phy()
87 		ret = phy_power_on(exynos_ohci->phy[i]);  in exynos_ohci_phy_enable()
89 		for (i--; i >= 0; i--)  in exynos_ohci_phy_enable()
90 			phy_power_off(exynos_ohci->phy[i]);  in exynos_ohci_phy_enable()
102 		phy_power_off(exynos_ohci->phy[i]);  in exynos_ohci_phy_disable()
114 	 * Right now device-tree probed devices don't get dma_mask set.  in exynos_ohci_probe()
118 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in exynos_ohci_probe()
123 				&pdev->dev, dev_name(&pdev->dev));  in exynos_ohci_probe()
125 		dev_err(&pdev->dev, "Unable to create HCD\n");  in exynos_ohci_probe()
126 		return -ENOMEM;  in exynos_ohci_probe()
131 	err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);  in exynos_ohci_probe()
135 	exynos_ohci->clk = devm_clk_get_enabled(&pdev->dev, "usbhost");  in exynos_ohci_probe()
137 	if (IS_ERR(exynos_ohci->clk)) {  in exynos_ohci_probe()
138 		dev_err(&pdev->dev, "Failed to get usbhost clock\n");  in exynos_ohci_probe()
139 		err = PTR_ERR(exynos_ohci->clk);  in exynos_ohci_probe()
143 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in exynos_ohci_probe()
144 	if (IS_ERR(hcd->regs)) {  in exynos_ohci_probe()
145 		err = PTR_ERR(hcd->regs);  in exynos_ohci_probe()
148 	hcd->rsrc_start = res->start;  in exynos_ohci_probe()
149 	hcd->rsrc_len = resource_size(res);  in exynos_ohci_probe()
159 	err = exynos_ohci_phy_enable(&pdev->dev);  in exynos_ohci_probe()
161 		dev_err(&pdev->dev, "Failed to enable USB phy\n");  in exynos_ohci_probe()
167 	 * Exynos OHCI port subnodes and generic USB device bindings  in exynos_ohci_probe()
169 	exynos_ohci->of_node = pdev->dev.of_node;  in exynos_ohci_probe()
170 	if (exynos_ohci->legacy_phy)  in exynos_ohci_probe()
171 		pdev->dev.of_node = NULL;  in exynos_ohci_probe()
175 		dev_err(&pdev->dev, "Failed to add USB HCD\n");  in exynos_ohci_probe()
178 	device_wakeup_enable(hcd->self.controller);  in exynos_ohci_probe()
182 	exynos_ohci_phy_disable(&pdev->dev);  in exynos_ohci_probe()
183 	pdev->dev.of_node = exynos_ohci->of_node;  in exynos_ohci_probe()
194 	pdev->dev.of_node = exynos_ohci->of_node;  in exynos_ohci_remove()
198 	exynos_ohci_phy_disable(&pdev->dev);  in exynos_ohci_remove()
207 	if (hcd->driver->shutdown)  in exynos_ohci_shutdown()
208 		hcd->driver->shutdown(hcd);  in exynos_ohci_shutdown()
223 	clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_suspend()
234 	clk_prepare_enable(exynos_ohci->clk);  in exynos_ohci_resume()
239 		clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_resume()
257 	{ .compatible = "samsung,exynos4210-ohci" },
268 		.name	= "exynos-ohci",
276 		return -ENODEV;  in ohci_exynos_init()
289 MODULE_ALIAS("platform:exynos-ohci");
291 MODULE_DESCRIPTION("OHCI support for Samsung S5P/Exynos SoC Series");