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

/*
 * SAMSUNG EXYNOS USB HOST EHCI Controller
 *
 * Copyright (C) 2011 Samsung Electronics Co.Ltd
 * Author: Jingoo Han <jg1.han@samsung.com>
 * Author: Joonyoung Shim <jy0922.shim@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/of_gpio.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.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 "ehci.h"

#define DRIVER_DESC "EHCI EXYNOS driver"

#define EHCI_INSNREG00(base)			(base + 0x90)
#define EHCI_INSNREG00_ENA_INCR16		(0x1 << 25)
#define EHCI_INSNREG00_ENA_INCR8		(0x1 << 24)
#define EHCI_INSNREG00_ENA_INCR4		(0x1 << 23)
#define EHCI_INSNREG00_ENA_INCRX_ALIGN		(0x1 << 22)
#define EHCI_INSNREG00_ENABLE_DMA_BURST	\
	(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 |	\
	 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)

static const char hcd_name[] = "ehci-exynos";
static struct hc_driver __read_mostly exynos_ehci_hc_driver;

#define PHY_NUMBER 3

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

#define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)

static int exynos_ehci_get_phy(struct device *dev,
				struct exynos_ehci_hcd *exynos_ehci)
{
	struct device_node *child;
	struct phy *phy;
	int phy_number;
	int ret = 0;

	exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	if (IS_ERR(exynos_ehci->phy)) {
		ret = PTR_ERR(exynos_ehci->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_ehci->otg = exynos_ehci->phy->otg;
	}

	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_ehci->phy_g[phy_number] = phy;
	}

	return ret;
}

static int exynos_ehci_phy_enable(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
	int i;
	int ret = 0;

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

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

	return ret;
}

static void exynos_ehci_phy_disable(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
	int i;

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

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

static void exynos_setup_vbus_gpio(struct device *dev)
{
	int err;
	int gpio;

	if (!dev->of_node)
		return;

	gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
	if (!gpio_is_valid(gpio))
		return;

	err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
				    "ehci_vbus_gpio");
	if (err)
		dev_err(dev, "can't request ehci vbus gpio %d", gpio);
}

static int exynos_ehci_probe(struct platform_device *pdev)
{
	struct exynos_ehci_hcd *exynos_ehci;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	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;

	exynos_setup_vbus_gpio(&pdev->dev);

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

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

	err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci);
	if (err)
		goto fail_clk;

skip_phy:

	exynos_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");

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

	err = clk_prepare_enable(exynos_ehci->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_ehci->otg)
		exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);

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

	ehci = hcd_to_ehci(hcd);
	ehci->caps = hcd->regs;

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	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);

	platform_set_drvdata(pdev, hcd);

	return 0;

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

static int exynos_ehci_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);

	usb_remove_hcd(hcd);

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

	exynos_ehci_phy_disable(&pdev->dev);

	clk_disable_unprepare(exynos_ehci->clk);

	usb_put_hcd(hcd);

	return 0;
}

#ifdef CONFIG_PM
static int exynos_ehci_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);

	bool do_wakeup = device_may_wakeup(dev);
	int rc;

	rc = ehci_suspend(hcd, do_wakeup);
	if (rc)
		return rc;

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

	exynos_ehci_phy_disable(dev);

	clk_disable_unprepare(exynos_ehci->clk);

	return rc;
}

static int exynos_ehci_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
	int ret;

	clk_prepare_enable(exynos_ehci->clk);

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

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

	/* DMA burst Enable */
	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));

	ehci_resume(hcd, false);
	return 0;
}
#else
#define exynos_ehci_suspend	NULL
#define exynos_ehci_resume	NULL
#endif

static const struct dev_pm_ops exynos_ehci_pm_ops = {
	.suspend	= exynos_ehci_suspend,
	.resume		= exynos_ehci_resume,
};

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

static struct platform_driver exynos_ehci_driver = {
	.probe		= exynos_ehci_probe,
	.remove		= exynos_ehci_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver = {
		.name	= "exynos-ehci",
		.owner	= THIS_MODULE,
		.pm	= &exynos_ehci_pm_ops,
		.of_match_table = of_match_ptr(exynos_ehci_match),
	}
};
static const struct ehci_driver_overrides exynos_overrides __initdata = {
	.extra_priv_size = sizeof(struct exynos_ehci_hcd),
};

static int __init ehci_exynos_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	ehci_init_driver(&exynos_ehci_hc_driver, &exynos_overrides);
	return platform_driver_register(&exynos_ehci_driver);
}
module_init(ehci_exynos_init);

static void __exit ehci_exynos_cleanup(void)
{
	platform_driver_unregister(&exynos_ehci_driver);
}
module_exit(ehci_exynos_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:exynos-ehci");
MODULE_AUTHOR("Jingoo Han");
MODULE_AUTHOR("Joonyoung Shim");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1bcc5aa8	1	/*
29824c16	2	* SAMSUNG EXYNOS USB HOST EHCI Controller
1bcc5aa8 JS	3	*
	4	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	5	* Author: Jingoo Han <jg1.han@samsung.com>
	6	* Author: Joonyoung Shim <jy0922.shim@samsung.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/clk.h>
7edb3daf MG	16	#include <linux/dma-mapping.h>
	17	#include <linux/io.h>
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
2c026e2b	20	#include <linux/of.h>
fd81d59c	21	#include <linux/of_gpio.h>
1c17675d	22	#include <linux/phy/phy.h>
7edb3daf	23	#include <linux/platform_device.h>
d233c196	24	#include <linux/usb/phy.h>
b506eebc	25	#include <linux/usb/samsung_usb_phy.h>
7edb3daf MG	26	#include <linux/usb.h>
	27	#include <linux/usb/hcd.h>
	28	#include <linux/usb/otg.h>
	29
	30	#include "ehci.h"
	31
29824c16	32	#define DRIVER_DESC "EHCI EXYNOS driver"
1bcc5aa8	33
88555a63 JH	34	#define EHCI_INSNREG00(base) (base + 0x90)
	35	#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
	36	#define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
	37	#define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
	38	#define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
	39	#define EHCI_INSNREG00_ENABLE_DMA_BURST \
	40	(EHCI_INSNREG00_ENA_INCR16 \| EHCI_INSNREG00_ENA_INCR8 \| \
	41	EHCI_INSNREG00_ENA_INCR4 \| EHCI_INSNREG00_ENA_INCRX_ALIGN)
	42
29824c16 JH	43	static const char hcd_name[] = "ehci-exynos";
29824c16 JH	44	static struct hc_driver __read_mostly exynos_ehci_hc_driver;
7edb3daf	45
1c17675d KD	46	#define PHY_NUMBER 3
1c17675d KD	47
29824c16	48	struct exynos_ehci_hcd {
1bcc5aa8	49	struct clk *clk;
d233c196 VG	50	struct usb_phy *phy;
d233c196 VG	51	struct usb_otg *otg;
1c17675d	52	struct phy *phy_g[PHY_NUMBER];
1bcc5aa8 JS	53	};
1bcc5aa8 JS	54
29824c16	55	#define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
d233c196	56
1c17675d KD	57	static int exynos_ehci_get_phy(struct device *dev,
	58	struct exynos_ehci_hcd *exynos_ehci)
	59	{
	60	struct device_node *child;
	61	struct phy *phy;
	62	int phy_number;
	63	int ret = 0;
	64
	65	exynos_ehci->phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
	66	if (IS_ERR(exynos_ehci->phy)) {
	67	ret = PTR_ERR(exynos_ehci->phy);
	68	if (ret != -ENXIO && ret != -ENODEV) {
	69	dev_err(dev, "no usb2 phy configured\n");
	70	return ret;
	71	}
	72	dev_dbg(dev, "Failed to get usb2 phy\n");
	73	} else {
	74	exynos_ehci->otg = exynos_ehci->phy->otg;
	75	}
	76
	77	for_each_available_child_of_node(dev->of_node, child) {
	78	ret = of_property_read_u32(child, "reg", &phy_number);
	79	if (ret) {
	80	dev_err(dev, "Failed to parse device tree\n");
	81	of_node_put(child);
	82	return ret;
	83	}
	84
	85	if (phy_number >= PHY_NUMBER) {
	86	dev_err(dev, "Invalid number of PHYs\n");
	87	of_node_put(child);
	88	return -EINVAL;
	89	}
	90
	91	phy = devm_of_phy_get(dev, child, 0);
	92	of_node_put(child);
	93	if (IS_ERR(phy)) {
	94	ret = PTR_ERR(phy);
	95	if (ret != -ENOSYS && ret != -ENODEV) {
	96	dev_err(dev, "no usb2 phy configured\n");
	97	return ret;
	98	}
	99	dev_dbg(dev, "Failed to get usb2 phy\n");
	100	}
	101	exynos_ehci->phy_g[phy_number] = phy;
	102	}
	103
	104	return ret;
	105	}
	106
	107	static int exynos_ehci_phy_enable(struct device *dev)
	108	{
	109	struct usb_hcd *hcd = dev_get_drvdata(dev);
	110	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
	111	int i;
	112	int ret = 0;
	113
	114	if (!IS_ERR(exynos_ehci->phy))
	115	return usb_phy_init(exynos_ehci->phy);
	116
	117	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
	118	if (!IS_ERR(exynos_ehci->phy_g[i]))
	119	ret = phy_power_on(exynos_ehci->phy_g[i]);
	120	if (ret)
121	for (i--; i >= 0; i--)
122	if (!IS_ERR(exynos_ehci->phy_g[i]))
123	phy_power_off(exynos_ehci->phy_g[i]);
124
125	return ret;
126	}
127
128	static void exynos_ehci_phy_disable(struct device *dev)
129	{
130	struct usb_hcd *hcd = dev_get_drvdata(dev);
131	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
132	int i;
133
134	if (!IS_ERR(exynos_ehci->phy)) {
135	usb_phy_shutdown(exynos_ehci->phy);
136	return;
137	}
138
139	for (i = 0; i < PHY_NUMBER; i++)
140	if (!IS_ERR(exynos_ehci->phy_g[i]))
141	phy_power_off(exynos_ehci->phy_g[i]);
142	}
143
91a9677a	144	static void exynos_setup_vbus_gpio(struct device *dev)
fd81d59c VG	145	{
	146	int err;
	147	int gpio;
	148
3f3b55bf	149	if (!dev->of_node)
fd81d59c VG	150	return;
fd81d59c VG	151
3f3b55bf	152	gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
fd81d59c VG	153	if (!gpio_is_valid(gpio))
	154	return;
	155
3f3b55bf DA	156	err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
3f3b55bf DA	157	"ehci_vbus_gpio");
fd81d59c	158	if (err)
3f3b55bf	159	dev_err(dev, "can't request ehci vbus gpio %d", gpio);
fd81d59c VG	160	}
fd81d59c VG	161
29824c16	162	static int exynos_ehci_probe(struct platform_device *pdev)
1bcc5aa8	163	{
29824c16	164	struct exynos_ehci_hcd *exynos_ehci;
1bcc5aa8 JS	165	struct usb_hcd *hcd;
	166	struct ehci_hcd *ehci;
	167	struct resource *res;
	168	int irq;
	169	int err;
	170
2c026e2b VG	171	/*
	172	* Right now device-tree probed devices don't get dma_mask set.
	173	* Since shared usb code relies on it, set it here for now.
	174	* Once we move to full device tree support this will vanish off.
	175	*/
e1fd7341	176	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	177	if (err)
22d9d8e8 RK	178	return err;
2c026e2b	179
91a9677a	180	exynos_setup_vbus_gpio(&pdev->dev);
fd81d59c	181
29824c16	182	hcd = usb_create_hcd(&exynos_ehci_hc_driver,
7edb3daf MG	183	&pdev->dev, dev_name(&pdev->dev));
	184	if (!hcd) {
	185	dev_err(&pdev->dev, "Unable to create HCD\n");
1bcc5aa8	186	return -ENOMEM;
7edb3daf	187	}
29824c16	188	exynos_ehci = to_exynos_ehci(hcd);
e6b0166f TA	189
e6b0166f TA	190	if (of_device_is_compatible(pdev->dev.of_node,
57ae1605	191	"samsung,exynos5440-ehci"))
e6b0166f	192	goto skip_phy;
e6b0166f	193
1c17675d KD	194	err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci);
	195	if (err)
	196	goto fail_clk;
d233c196	197
e6b0166f TA	198	skip_phy:
e6b0166f TA	199
29824c16	200	exynos_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
1bcc5aa8	201
29824c16	202	if (IS_ERR(exynos_ehci->clk)) {
1bcc5aa8	203	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
29824c16	204	err = PTR_ERR(exynos_ehci->clk);
1bcc5aa8 JS	205	goto fail_clk;
	206	}
	207
29824c16	208	err = clk_prepare_enable(exynos_ehci->clk);
1bcc5aa8	209	if (err)
63fd0ae4	210	goto fail_clk;
1bcc5aa8 JS	211
	212	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	213	if (!res) {
	214	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	215	err = -ENXIO;
	216	goto fail_io;
	217	}
	218
	219	hcd->rsrc_start = res->start;
	220	hcd->rsrc_len = resource_size(res);
9cb07563	221	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
1bcc5aa8 JS	222	if (!hcd->regs) {
	223	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	224	err = -ENOMEM;
	225	goto fail_io;
	226	}
	227
	228	irq = platform_get_irq(pdev, 0);
	229	if (!irq) {
	230	dev_err(&pdev->dev, "Failed to get IRQ\n");
	231	err = -ENODEV;
9cb07563	232	goto fail_io;
1bcc5aa8 JS	233	}
1bcc5aa8 JS	234
29824c16 JH	235	if (exynos_ehci->otg)
29824c16 JH	236	exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
d233c196	237
1c17675d KD	238	err = exynos_ehci_phy_enable(&pdev->dev);
	239	if (err) {
	240	dev_err(&pdev->dev, "Failed to enable USB phy\n");
	241	goto fail_io;
	242	}
1bcc5aa8 JS	243
	244	ehci = hcd_to_ehci(hcd);
	245	ehci->caps = hcd->regs;
1bcc5aa8	246
88555a63 JH	247	/* DMA burst Enable */
	248	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	249
b5dd18d8	250	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
1bcc5aa8 JS	251	if (err) {
1bcc5aa8 JS	252	dev_err(&pdev->dev, "Failed to add USB HCD\n");
d233c196	253	goto fail_add_hcd;
1bcc5aa8	254	}
3c9740a1	255	device_wakeup_enable(hcd->self.controller);
1bcc5aa8	256
bbcd85a0	257	platform_set_drvdata(pdev, hcd);
1bcc5aa8 JS	258
	259	return 0;
	260
d233c196	261	fail_add_hcd:
1c17675d	262	exynos_ehci_phy_disable(&pdev->dev);
1bcc5aa8	263	fail_io:
29824c16	264	clk_disable_unprepare(exynos_ehci->clk);
1bcc5aa8 JS	265	fail_clk:
1bcc5aa8 JS	266	usb_put_hcd(hcd);
1bcc5aa8 JS	267	return err;
	268	}
	269
29824c16	270	static int exynos_ehci_remove(struct platform_device *pdev)
1bcc5aa8	271	{
7edb3daf	272	struct usb_hcd *hcd = platform_get_drvdata(pdev);
29824c16	273	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
1bcc5aa8 JS	274
	275	usb_remove_hcd(hcd);
	276
29824c16 JH	277	if (exynos_ehci->otg)
29824c16 JH	278	exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
d233c196	279
1c17675d	280	exynos_ehci_phy_disable(&pdev->dev);
1bcc5aa8	281
29824c16	282	clk_disable_unprepare(exynos_ehci->clk);
1bcc5aa8 JS	283
1bcc5aa8 JS	284	usb_put_hcd(hcd);
1bcc5aa8 JS	285
	286	return 0;
	287	}
	288
1acb30ef	289	#ifdef CONFIG_PM
29824c16	290	static int exynos_ehci_suspend(struct device *dev)
1acb30ef	291	{
7edb3daf	292	struct usb_hcd *hcd = dev_get_drvdata(dev);
29824c16	293	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
7edb3daf	294
c5cf9212	295	bool do_wakeup = device_may_wakeup(dev);
c5cf9212	296	int rc;
1acb30ef	297
c5cf9212	298	rc = ehci_suspend(hcd, do_wakeup);
d7217510 VG	299	if (rc)
d7217510 VG	300	return rc;
1acb30ef	301
29824c16 JH	302	if (exynos_ehci->otg)
29824c16 JH	303	exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
d233c196	304
1c17675d	305	exynos_ehci_phy_disable(dev);
1acb30ef	306
29824c16	307	clk_disable_unprepare(exynos_ehci->clk);
8b4fc8c7	308
1acb30ef JH	309	return rc;
	310	}
	311
29824c16	312	static int exynos_ehci_resume(struct device *dev)
1acb30ef	313	{
7edb3daf	314	struct usb_hcd *hcd = dev_get_drvdata(dev);
29824c16	315	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
1c17675d	316	int ret;
1acb30ef	317
29824c16	318	clk_prepare_enable(exynos_ehci->clk);
8b4fc8c7	319
29824c16 JH	320	if (exynos_ehci->otg)
29824c16 JH	321	exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self);
d233c196	322
1c17675d KD	323	ret = exynos_ehci_phy_enable(dev);
	324	if (ret) {
	325	dev_err(dev, "Failed to enable USB phy\n");
	326	clk_disable_unprepare(exynos_ehci->clk);
	327	return ret;
	328	}
1acb30ef	329
88555a63 JH	330	/* DMA burst Enable */
	331	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	332
c5cf9212	333	ehci_resume(hcd, false);
1acb30ef JH	334	return 0;
	335	}
	336	#else
29824c16 JH	337	#define exynos_ehci_suspend NULL
29824c16 JH	338	#define exynos_ehci_resume NULL
1acb30ef JH	339	#endif
1acb30ef JH	340
29824c16 JH	341	static const struct dev_pm_ops exynos_ehci_pm_ops = {
	342	.suspend = exynos_ehci_suspend,
	343	.resume = exynos_ehci_resume,
1acb30ef JH	344	};
1acb30ef JH	345
2c026e2b VG	346	#ifdef CONFIG_OF
2c026e2b VG	347	static const struct of_device_id exynos_ehci_match[] = {
6e247777	348	{ .compatible = "samsung,exynos4210-ehci" },
e6b0166f	349	{ .compatible = "samsung,exynos5440-ehci" },
2c026e2b VG	350	{},
	351	};
	352	MODULE_DEVICE_TABLE(of, exynos_ehci_match);
	353	#endif
	354
29824c16 JH	355	static struct platform_driver exynos_ehci_driver = {
	356	.probe = exynos_ehci_probe,
	357	.remove = exynos_ehci_remove,
aaf6b52d	358	.shutdown = usb_hcd_platform_shutdown,
1bcc5aa8	359	.driver = {
29824c16	360	.name = "exynos-ehci",
1bcc5aa8	361	.owner = THIS_MODULE,
29824c16	362	.pm = &exynos_ehci_pm_ops,
2c026e2b	363	.of_match_table = of_match_ptr(exynos_ehci_match),
1bcc5aa8 JS	364	}
1bcc5aa8 JS	365	};
29824c16 JH	366	static const struct ehci_driver_overrides exynos_overrides __initdata = {
29824c16 JH	367	.extra_priv_size = sizeof(struct exynos_ehci_hcd),
7edb3daf MG	368	};
7edb3daf MG	369
29824c16	370	static int __init ehci_exynos_init(void)
7edb3daf MG	371	{
	372	if (usb_disabled())
	373	return -ENODEV;
	374
	375	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
29824c16 JH	376	ehci_init_driver(&exynos_ehci_hc_driver, &exynos_overrides);
29824c16 JH	377	return platform_driver_register(&exynos_ehci_driver);
7edb3daf	378	}
29824c16	379	module_init(ehci_exynos_init);
7edb3daf	380
29824c16	381	static void __exit ehci_exynos_cleanup(void)
7edb3daf	382	{
29824c16	383	platform_driver_unregister(&exynos_ehci_driver);
7edb3daf	384	}
29824c16	385	module_exit(ehci_exynos_cleanup);
1bcc5aa8	386
7edb3daf	387	MODULE_DESCRIPTION(DRIVER_DESC);
29824c16	388	MODULE_ALIAS("platform:exynos-ehci");
7edb3daf MG	389	MODULE_AUTHOR("Jingoo Han");
	390	MODULE_AUTHOR("Joonyoung Shim");
	391	MODULE_LICENSE("GPL v2");