[deliverable/linux.git] / drivers / usb / host / ohci-exynos.c

/*
 * SAMSUNG EXYNOS USB HOST OHCI Controller
 *
 * Copyright (C) 2011 Samsung Electronics Co.Ltd
 * Author: Jingoo Han <jg1.han@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/usb/phy.h>
#include <linux/usb/samsung_usb_phy.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/otg.h>

#include "ohci.h"

#define DRIVER_DESC "OHCI EXYNOS driver"

static const char hcd_name[] = "ohci-exynos";
static struct hc_driver __read_mostly exynos_ohci_hc_driver;

#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)

#define PHY_NUMBER 3

struct exynos_ohci_hcd {
	struct clk *clk;
	struct usb_phy *phy;
	struct usb_otg *otg;
	struct phy *phy_g[PHY_NUMBER];
};

static int exynos_ohci_get_phy(struct device *dev,
				struct exynos_ohci_hcd *exynos_ohci)
{
	struct device_node *child;
	struct phy *phy;
	int phy_number;
	int ret = 0;

	exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	if (IS_ERR(exynos_ohci->phy)) {
		ret = PTR_ERR(exynos_ohci->phy);
		if (ret != -ENXIO && ret != -ENODEV) {
			dev_err(dev, "no usb2 phy configured\n");
			return ret;
		}
		dev_dbg(dev, "Failed to get usb2 phy\n");
	} else {
		exynos_ohci->otg = exynos_ohci->phy->otg;
	}

	/*
	 * Getting generic phy:
	 * We are keeping both types of phys as a part of transiting OHCI
	 * to generic phy framework, so as to maintain backward compatibilty
	 * with old DTB.
	 * If there are existing devices using DTB files built from them,
	 * to remove the support for old bindings in this driver,
	 * we need to make sure that such devices have their DTBs
	 * updated to ones built from new DTS.
	 */
	for_each_available_child_of_node(dev->of_node, child) {
		ret = of_property_read_u32(child, "reg", &phy_number);
		if (ret) {
			dev_err(dev, "Failed to parse device tree\n");
			of_node_put(child);
			return ret;
		}

		if (phy_number >= PHY_NUMBER) {
			dev_err(dev, "Invalid number of PHYs\n");
			of_node_put(child);
			return -EINVAL;
		}

		phy = devm_of_phy_get(dev, child, 0);
		of_node_put(child);
		if (IS_ERR(phy)) {
			ret = PTR_ERR(phy);
			if (ret != -ENOSYS && ret != -ENODEV) {
				dev_err(dev, "no usb2 phy configured\n");
				return ret;
			}
			dev_dbg(dev, "Failed to get usb2 phy\n");
		}
		exynos_ohci->phy_g[phy_number] = phy;
	}

	return ret;
}

static int exynos_ohci_phy_enable(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
	int i;
	int ret = 0;

	if (!IS_ERR(exynos_ohci->phy))
		return usb_phy_init(exynos_ohci->phy);

	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
		if (!IS_ERR(exynos_ohci->phy_g[i]))
			ret = phy_power_on(exynos_ohci->phy_g[i]);
	if (ret)
		for (i--; i >= 0; i--)
			if (!IS_ERR(exynos_ohci->phy_g[i]))
				phy_power_off(exynos_ohci->phy_g[i]);

	return ret;
}

static void exynos_ohci_phy_disable(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
	int i;

	if (!IS_ERR(exynos_ohci->phy)) {
		usb_phy_shutdown(exynos_ohci->phy);
		return;
	}

	for (i = 0; i < PHY_NUMBER; i++)
		if (!IS_ERR(exynos_ohci->phy_g[i]))
			phy_power_off(exynos_ohci->phy_g[i]);
}

static int exynos_ohci_probe(struct platform_device *pdev)
{
	struct exynos_ohci_hcd *exynos_ohci;
	struct usb_hcd *hcd;
	struct resource *res;
	int irq;
	int err;

	/*
	 * Right now device-tree probed devices don't get dma_mask set.
	 * Since shared usb code relies on it, set it here for now.
	 * Once we move to full device tree support this will vanish off.
	 */
	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (err)
		return err;

	hcd = usb_create_hcd(&exynos_ohci_hc_driver,
				&pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Unable to create HCD\n");
		return -ENOMEM;
	}

	exynos_ohci = to_exynos_ohci(hcd);

	if (of_device_is_compatible(pdev->dev.of_node,
					"samsung,exynos5440-ohci"))
		goto skip_phy;

	err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);
	if (err)
		goto fail_clk;

skip_phy:
	exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");

	if (IS_ERR(exynos_ohci->clk)) {
		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
		err = PTR_ERR(exynos_ohci->clk);
		goto fail_clk;
	}

	err = clk_prepare_enable(exynos_ohci->clk);
	if (err)
		goto fail_clk;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get I/O memory\n");
		err = -ENXIO;
		goto fail_io;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);
	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
		err = -ENOMEM;
		goto fail_io;
	}

	irq = platform_get_irq(pdev, 0);
	if (!irq) {
		dev_err(&pdev->dev, "Failed to get IRQ\n");
		err = -ENODEV;
		goto fail_io;
	}

	if (exynos_ohci->otg)
		exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);

	platform_set_drvdata(pdev, hcd);

	err = exynos_ohci_phy_enable(&pdev->dev);
	if (err) {
		dev_err(&pdev->dev, "Failed to enable USB phy\n");
		goto fail_io;
	}

	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err) {
		dev_err(&pdev->dev, "Failed to add USB HCD\n");
		goto fail_add_hcd;
	}
	device_wakeup_enable(hcd->self.controller);
	return 0;

fail_add_hcd:
	exynos_ohci_phy_disable(&pdev->dev);
fail_io:
	clk_disable_unprepare(exynos_ohci->clk);
fail_clk:
	usb_put_hcd(hcd);
	return err;
}

static int exynos_ohci_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);

	usb_remove_hcd(hcd);

	if (exynos_ohci->otg)
		exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);

	exynos_ohci_phy_disable(&pdev->dev);

	clk_disable_unprepare(exynos_ohci->clk);

	usb_put_hcd(hcd);

	return 0;
}

static void exynos_ohci_shutdown(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	if (hcd->driver->shutdown)
		hcd->driver->shutdown(hcd);
}

#ifdef CONFIG_PM
static int exynos_ohci_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
	bool do_wakeup = device_may_wakeup(dev);
	int rc = ohci_suspend(hcd, do_wakeup);

	if (rc)
		return rc;

	if (exynos_ohci->otg)
		exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);

	exynos_ohci_phy_disable(dev);

	clk_disable_unprepare(exynos_ohci->clk);

	return 0;
}

static int exynos_ohci_resume(struct device *dev)
{
	struct usb_hcd *hcd			= dev_get_drvdata(dev);
	struct exynos_ohci_hcd *exynos_ohci	= to_exynos_ohci(hcd);
	int ret;

	clk_prepare_enable(exynos_ohci->clk);

	if (exynos_ohci->otg)
		exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);

	ret = exynos_ohci_phy_enable(dev);
	if (ret) {
		dev_err(dev, "Failed to enable USB phy\n");
		clk_disable_unprepare(exynos_ohci->clk);
		return ret;
	}

	ohci_resume(hcd, false);

	return 0;
}
#else
#define exynos_ohci_suspend	NULL
#define exynos_ohci_resume	NULL
#endif

static const struct ohci_driver_overrides exynos_overrides __initconst = {
	.extra_priv_size =	sizeof(struct exynos_ohci_hcd),
};

static const struct dev_pm_ops exynos_ohci_pm_ops = {
	.suspend	= exynos_ohci_suspend,
	.resume		= exynos_ohci_resume,
};

#ifdef CONFIG_OF
static const struct of_device_id exynos_ohci_match[] = {
	{ .compatible = "samsung,exynos4210-ohci" },
	{ .compatible = "samsung,exynos5440-ohci" },
	{},
};
MODULE_DEVICE_TABLE(of, exynos_ohci_match);
#endif

static struct platform_driver exynos_ohci_driver = {
	.probe		= exynos_ohci_probe,
	.remove		= exynos_ohci_remove,
	.shutdown	= exynos_ohci_shutdown,
	.driver = {
		.name	= "exynos-ohci",
		.owner	= THIS_MODULE,
		.pm	= &exynos_ohci_pm_ops,
		.of_match_table	= of_match_ptr(exynos_ohci_match),
	}
};
static int __init ohci_exynos_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides);
	return platform_driver_register(&exynos_ohci_driver);
}
module_init(ohci_exynos_init);

static void __exit ohci_exynos_cleanup(void)
{
	platform_driver_unregister(&exynos_ohci_driver);
}
module_exit(ohci_exynos_cleanup);

MODULE_ALIAS("platform:exynos-ohci");
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
62194244 JH	1	/*
	2	* SAMSUNG EXYNOS USB HOST OHCI Controller
	3	*
	4	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	5	* Author: Jingoo Han <jg1.han@samsung.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the
	9	* Free Software Foundation; either version 2 of the License, or (at your
	10	* option) any later version.
	11	*
	12	*/
	13
	14	#include <linux/clk.h>
50a97e05 MG	15	#include <linux/dma-mapping.h>
	16	#include <linux/io.h>
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
d5138930	19	#include <linux/of.h>
62194244	20	#include <linux/platform_device.h>
7d28e54b	21	#include <linux/phy/phy.h>
ed993bf1	22	#include <linux/usb/phy.h>
b506eebc	23	#include <linux/usb/samsung_usb_phy.h>
50a97e05 MG	24	#include <linux/usb.h>
	25	#include <linux/usb/hcd.h>
	26	#include <linux/usb/otg.h>
	27
	28	#include "ohci.h"
	29
	30	#define DRIVER_DESC "OHCI EXYNOS driver"
	31
	32	static const char hcd_name[] = "ohci-exynos";
	33	static struct hc_driver __read_mostly exynos_ohci_hc_driver;
	34
	35	#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
62194244	36
7d28e54b VG	37	#define PHY_NUMBER 3
7d28e54b VG	38
62194244	39	struct exynos_ohci_hcd {
62194244	40	struct clk *clk;
ed993bf1 VG	41	struct usb_phy *phy;
ed993bf1 VG	42	struct usb_otg *otg;
7d28e54b	43	struct phy *phy_g[PHY_NUMBER];
62194244 JH	44	};
62194244 JH	45
7d28e54b VG	46	static int exynos_ohci_get_phy(struct device *dev,
	47	struct exynos_ohci_hcd *exynos_ohci)
	48	{
	49	struct device_node *child;
	50	struct phy *phy;
	51	int phy_number;
	52	int ret = 0;
	53
	54	exynos_ohci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	55	if (IS_ERR(exynos_ohci->phy)) {
	56	ret = PTR_ERR(exynos_ohci->phy);
	57	if (ret != -ENXIO && ret != -ENODEV) {
	58	dev_err(dev, "no usb2 phy configured\n");
	59	return ret;
	60	}
	61	dev_dbg(dev, "Failed to get usb2 phy\n");
	62	} else {
	63	exynos_ohci->otg = exynos_ohci->phy->otg;
	64	}
	65
	66	/*
	67	* Getting generic phy:
	68	* We are keeping both types of phys as a part of transiting OHCI
	69	* to generic phy framework, so as to maintain backward compatibilty
	70	* with old DTB.
	71	* If there are existing devices using DTB files built from them,
	72	* to remove the support for old bindings in this driver,
	73	* we need to make sure that such devices have their DTBs
	74	* updated to ones built from new DTS.
	75	*/
	76	for_each_available_child_of_node(dev->of_node, child) {
	77	ret = of_property_read_u32(child, "reg", &phy_number);
	78	if (ret) {
	79	dev_err(dev, "Failed to parse device tree\n");
	80	of_node_put(child);
	81	return ret;
	82	}
	83
	84	if (phy_number >= PHY_NUMBER) {
	85	dev_err(dev, "Invalid number of PHYs\n");
	86	of_node_put(child);
	87	return -EINVAL;
	88	}
	89
	90	phy = devm_of_phy_get(dev, child, 0);
	91	of_node_put(child);
	92	if (IS_ERR(phy)) {
	93	ret = PTR_ERR(phy);
	94	if (ret != -ENOSYS && ret != -ENODEV) {
	95	dev_err(dev, "no usb2 phy configured\n");
	96	return ret;
	97	}
	98	dev_dbg(dev, "Failed to get usb2 phy\n");
	99	}
	100	exynos_ohci->phy_g[phy_number] = phy;
	101	}
	102
	103	return ret;
	104	}
	105
	106	static int exynos_ohci_phy_enable(struct device *dev)
ed993bf1	107	{
54969ed6	108	struct usb_hcd *hcd = dev_get_drvdata(dev);
50a97e05	109	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
7d28e54b VG	110	int i;
	111	int ret = 0;
	112
	113	if (!IS_ERR(exynos_ohci->phy))
	114	return usb_phy_init(exynos_ohci->phy);
ed993bf1	115
7d28e54b VG	116	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
	117	if (!IS_ERR(exynos_ohci->phy_g[i]))
	118	ret = phy_power_on(exynos_ohci->phy_g[i]);
	119	if (ret)
	120	for (i--; i >= 0; i--)
	121	if (!IS_ERR(exynos_ohci->phy_g[i]))
	122	phy_power_off(exynos_ohci->phy_g[i]);
	123
	124	return ret;
ed993bf1 VG	125	}
ed993bf1 VG	126
54969ed6	127	static void exynos_ohci_phy_disable(struct device *dev)
ed993bf1	128	{
54969ed6	129	struct usb_hcd *hcd = dev_get_drvdata(dev);
50a97e05	130	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
7d28e54b	131	int i;
ed993bf1	132
7d28e54b	133	if (!IS_ERR(exynos_ohci->phy)) {
ed993bf1	134	usb_phy_shutdown(exynos_ohci->phy);
7d28e54b VG	135	return;
	136	}
	137
	138	for (i = 0; i < PHY_NUMBER; i++)
	139	if (!IS_ERR(exynos_ohci->phy_g[i]))
	140	phy_power_off(exynos_ohci->phy_g[i]);
ed993bf1 VG	141	}
ed993bf1 VG	142
41ac7b3a	143	static int exynos_ohci_probe(struct platform_device *pdev)
62194244	144	{
62194244 JH	145	struct exynos_ohci_hcd *exynos_ohci;
62194244 JH	146	struct usb_hcd *hcd;
62194244 JH	147	struct resource *res;
	148	int irq;
	149	int err;
	150
d5138930 VG	151	/*
	152	* Right now device-tree probed devices don't get dma_mask set.
	153	* Since shared usb code relies on it, set it here for now.
	154	* Once we move to full device tree support this will vanish off.
	155	*/
e1fd7341	156	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	157	if (err)
22d9d8e8 RK	158	return err;
d5138930	159
50a97e05 MG	160	hcd = usb_create_hcd(&exynos_ohci_hc_driver,
	161	&pdev->dev, dev_name(&pdev->dev));
	162	if (!hcd) {
	163	dev_err(&pdev->dev, "Unable to create HCD\n");
62194244	164	return -ENOMEM;
50a97e05 MG	165	}
	166
	167	exynos_ohci = to_exynos_ohci(hcd);
62194244	168
2871782a TA	169	if (of_device_is_compatible(pdev->dev.of_node,
	170	"samsung,exynos5440-ohci"))
	171	goto skip_phy;
	172
7d28e54b VG	173	err = exynos_ohci_get_phy(&pdev->dev, exynos_ohci);
	174	if (err)
	175	goto fail_clk;
ed993bf1	176
2871782a	177	skip_phy:
60d80adb	178	exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
62194244 JH	179
	180	if (IS_ERR(exynos_ohci->clk)) {
	181	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
	182	err = PTR_ERR(exynos_ohci->clk);
	183	goto fail_clk;
	184	}
	185
c05c946c	186	err = clk_prepare_enable(exynos_ohci->clk);
62194244	187	if (err)
60d80adb	188	goto fail_clk;
62194244 JH	189
	190	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	191	if (!res) {
	192	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	193	err = -ENXIO;
	194	goto fail_io;
	195	}
	196
	197	hcd->rsrc_start = res->start;
	198	hcd->rsrc_len = resource_size(res);
390a0a78	199	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
62194244 JH	200	if (!hcd->regs) {
	201	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	202	err = -ENOMEM;
	203	goto fail_io;
	204	}
	205
	206	irq = platform_get_irq(pdev, 0);
	207	if (!irq) {
	208	dev_err(&pdev->dev, "Failed to get IRQ\n");
	209	err = -ENODEV;
390a0a78	210	goto fail_io;
62194244 JH	211	}
62194244 JH	212
ed993bf1	213	if (exynos_ohci->otg)
50a97e05	214	exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
ed993bf1	215
50a97e05	216	platform_set_drvdata(pdev, hcd);
62194244	217
7d28e54b VG	218	err = exynos_ohci_phy_enable(&pdev->dev);
	219	if (err) {
	220	dev_err(&pdev->dev, "Failed to enable USB phy\n");
	221	goto fail_io;
	222	}
62194244 JH	223
	224	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	225	if (err) {
	226	dev_err(&pdev->dev, "Failed to add USB HCD\n");
ed993bf1	227	goto fail_add_hcd;
62194244	228	}
3c9740a1	229	device_wakeup_enable(hcd->self.controller);
62194244 JH	230	return 0;
62194244 JH	231
ed993bf1	232	fail_add_hcd:
54969ed6	233	exynos_ohci_phy_disable(&pdev->dev);
62194244	234	fail_io:
c05c946c	235	clk_disable_unprepare(exynos_ohci->clk);
62194244 JH	236	fail_clk:
62194244 JH	237	usb_put_hcd(hcd);
62194244 JH	238	return err;
	239	}
	240
fb4e98ab	241	static int exynos_ohci_remove(struct platform_device *pdev)
62194244	242	{
50a97e05 MG	243	struct usb_hcd *hcd = platform_get_drvdata(pdev);
50a97e05 MG	244	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
62194244 JH	245
	246	usb_remove_hcd(hcd);
	247
ed993bf1	248	if (exynos_ohci->otg)
50a97e05	249	exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
ed993bf1	250
54969ed6	251	exynos_ohci_phy_disable(&pdev->dev);
62194244	252
c05c946c	253	clk_disable_unprepare(exynos_ohci->clk);
62194244 JH	254
62194244 JH	255	usb_put_hcd(hcd);
62194244 JH	256
	257	return 0;
	258	}
	259
	260	static void exynos_ohci_shutdown(struct platform_device *pdev)
	261	{
50a97e05	262	struct usb_hcd *hcd = platform_get_drvdata(pdev);
62194244 JH	263
	264	if (hcd->driver->shutdown)
	265	hcd->driver->shutdown(hcd);
	266	}
	267
	268	#ifdef CONFIG_PM
	269	static int exynos_ohci_suspend(struct device *dev)
	270	{
50a97e05 MG	271	struct usb_hcd *hcd = dev_get_drvdata(dev);
50a97e05 MG	272	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
14982e31	273	bool do_wakeup = device_may_wakeup(dev);
14982e31	274	int rc = ohci_suspend(hcd, do_wakeup);
62194244	275
14982e31 MG	276	if (rc)
14982e31 MG	277	return rc;
066ba8e0	278
ed993bf1	279	if (exynos_ohci->otg)
50a97e05	280	exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
ed993bf1	281
54969ed6	282	exynos_ohci_phy_disable(dev);
e864abed	283
c05c946c	284	clk_disable_unprepare(exynos_ohci->clk);
e864abed	285
14982e31	286	return 0;
62194244 JH	287	}
	288
	289	static int exynos_ohci_resume(struct device *dev)
	290	{
50a97e05 MG	291	struct usb_hcd *hcd = dev_get_drvdata(dev);
50a97e05 MG	292	struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
7d28e54b	293	int ret;
62194244	294
c05c946c	295	clk_prepare_enable(exynos_ohci->clk);
e864abed	296
ed993bf1	297	if (exynos_ohci->otg)
50a97e05	298	exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
ed993bf1	299
7d28e54b VG	300	ret = exynos_ohci_phy_enable(dev);
	301	if (ret) {
	302	dev_err(dev, "Failed to enable USB phy\n");
	303	clk_disable_unprepare(exynos_ohci->clk);
	304	return ret;
	305	}
62194244	306
cfa49b4b	307	ohci_resume(hcd, false);
62194244 JH	308
	309	return 0;
	310	}
	311	#else
	312	#define exynos_ohci_suspend NULL
	313	#define exynos_ohci_resume NULL
	314	#endif
	315
50a97e05 MG	316	static const struct ohci_driver_overrides exynos_overrides __initconst = {
	317	.extra_priv_size = sizeof(struct exynos_ohci_hcd),
	318	};
	319
62194244 JH	320	static const struct dev_pm_ops exynos_ohci_pm_ops = {
	321	.suspend = exynos_ohci_suspend,
	322	.resume = exynos_ohci_resume,
	323	};
	324
d5138930 VG	325	#ifdef CONFIG_OF
d5138930 VG	326	static const struct of_device_id exynos_ohci_match[] = {
6e247777	327	{ .compatible = "samsung,exynos4210-ohci" },
2871782a	328	{ .compatible = "samsung,exynos5440-ohci" },
d5138930 VG	329	{},
	330	};
	331	MODULE_DEVICE_TABLE(of, exynos_ohci_match);
	332	#endif
	333
62194244 JH	334	static struct platform_driver exynos_ohci_driver = {
62194244 JH	335	.probe = exynos_ohci_probe,
7690417d	336	.remove = exynos_ohci_remove,
62194244 JH	337	.shutdown = exynos_ohci_shutdown,
	338	.driver = {
	339	.name = "exynos-ohci",
	340	.owner = THIS_MODULE,
	341	.pm = &exynos_ohci_pm_ops,
d5138930	342	.of_match_table = of_match_ptr(exynos_ohci_match),
62194244 JH	343	}
62194244 JH	344	};
50a97e05 MG	345	static int __init ohci_exynos_init(void)
	346	{
	347	if (usb_disabled())
	348	return -ENODEV;
	349
	350	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	351	ohci_init_driver(&exynos_ohci_hc_driver, &exynos_overrides);
	352	return platform_driver_register(&exynos_ohci_driver);
	353	}
	354	module_init(ohci_exynos_init);
	355
	356	static void __exit ohci_exynos_cleanup(void)
	357	{
	358	platform_driver_unregister(&exynos_ohci_driver);
	359	}
	360	module_exit(ohci_exynos_cleanup);
62194244 JH	361
	362	MODULE_ALIAS("platform:exynos-ohci");
	363	MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
50a97e05	364	MODULE_LICENSE("GPL v2");