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)
46 	num_phys = of_count_phandle_with_args(dev->of_node, "phys",  in exynos_ohci_get_phy()
47 					      "#phy-cells");  in exynos_ohci_get_phy()
49 		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);  in exynos_ohci_get_phy()
52 		exynos_ohci->phy[phy_number] = phy;  in exynos_ohci_get_phy()
58 	for_each_available_child_of_node(dev->of_node, child) {  in exynos_ohci_get_phy()
69 			return -EINVAL;  in exynos_ohci_get_phy()
73 		exynos_ohci->phy[phy_number] = phy;  in exynos_ohci_get_phy()
80 	exynos_ohci->legacy_phy = true;  in exynos_ohci_get_phy()
92 		ret = phy_power_on(exynos_ohci->phy[i]);  in exynos_ohci_phy_enable()
94 		for (i--; i >= 0; i--)  in exynos_ohci_phy_enable()
95 			phy_power_off(exynos_ohci->phy[i]);  in exynos_ohci_phy_enable()
107 		phy_power_off(exynos_ohci->phy[i]);  in exynos_ohci_phy_disable()
119 	 * Right now device-tree probed devices don't get dma_mask set.  in exynos_ohci_probe()
123 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in exynos_ohci_probe()
128 				&pdev->dev, dev_name(&pdev->dev));  in exynos_ohci_probe()
130 		dev_err(&pdev->dev, "Unable to create HCD\n");  in exynos_ohci_probe()
131 		return -ENOMEM;  in exynos_ohci_probe()
136 	err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);  in exynos_ohci_probe()
140 	exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");  in exynos_ohci_probe()
142 	if (IS_ERR(exynos_ohci->clk)) {  in exynos_ohci_probe()
143 		dev_err(&pdev->dev, "Failed to get usbhost clock\n");  in exynos_ohci_probe()
144 		err = PTR_ERR(exynos_ohci->clk);  in exynos_ohci_probe()
148 	err = clk_prepare_enable(exynos_ohci->clk);  in exynos_ohci_probe()
152 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in exynos_ohci_probe()
153 	if (IS_ERR(hcd->regs)) {  in exynos_ohci_probe()
154 		err = PTR_ERR(hcd->regs);  in exynos_ohci_probe()
157 	hcd->rsrc_start = res->start;  in exynos_ohci_probe()
158 	hcd->rsrc_len = resource_size(res);  in exynos_ohci_probe()
168 	err = exynos_ohci_phy_enable(&pdev->dev);  in exynos_ohci_probe()
170 		dev_err(&pdev->dev, "Failed to enable USB phy\n");  in exynos_ohci_probe()
176 	 * Exynos OHCI port subnodes and generic USB device bindings  in exynos_ohci_probe()
178 	exynos_ohci->of_node = pdev->dev.of_node;  in exynos_ohci_probe()
179 	if (exynos_ohci->legacy_phy)  in exynos_ohci_probe()
180 		pdev->dev.of_node = NULL;  in exynos_ohci_probe()
184 		dev_err(&pdev->dev, "Failed to add USB HCD\n");  in exynos_ohci_probe()
187 	device_wakeup_enable(hcd->self.controller);  in exynos_ohci_probe()
191 	exynos_ohci_phy_disable(&pdev->dev);  in exynos_ohci_probe()
192 	pdev->dev.of_node = exynos_ohci->of_node;  in exynos_ohci_probe()
194 	clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_probe()
205 	pdev->dev.of_node = exynos_ohci->of_node;  in exynos_ohci_remove()
209 	exynos_ohci_phy_disable(&pdev->dev);  in exynos_ohci_remove()
211 	clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_remove()
220 	if (hcd->driver->shutdown)  in exynos_ohci_shutdown()
221 		hcd->driver->shutdown(hcd);  in exynos_ohci_shutdown()
237 	clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_suspend()
248 	clk_prepare_enable(exynos_ohci->clk);  in exynos_ohci_resume()
253 		clk_disable_unprepare(exynos_ohci->clk);  in exynos_ohci_resume()
277 	{ .compatible = "samsung,exynos4210-ohci" },
288 		.name	= "exynos-ohci",
296 		return -ENODEV;  in ohci_exynos_init()
309 MODULE_ALIAS("platform:exynos-ohci");