[deliverable/linux.git] / drivers / usb / host / ehci-s5p.c

/*
 * SAMSUNG S5P 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/of.h>
#include <linux/platform_device.h>
#include <linux/of_gpio.h>
#include <linux/platform_data/usb-ehci-s5p.h>
#include <linux/usb/phy.h>
#include <linux/usb/samsung_usb_phy.h>
#include <plat/usb-phy.h>

#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)

struct s5p_ehci_hcd {
	struct device *dev;
	struct usb_hcd *hcd;
	struct clk *clk;
	struct usb_phy *phy;
	struct usb_otg *otg;
	struct s5p_ehci_platdata *pdata;
};

static const struct hc_driver s5p_ehci_hc_driver = {
	.description		= hcd_name,
	.product_desc		= "S5P EHCI Host Controller",
	.hcd_priv_size		= sizeof(struct ehci_hcd),

	.irq			= ehci_irq,
	.flags			= HCD_MEMORY | HCD_USB2,

	.reset			= ehci_setup,
	.start			= ehci_run,
	.stop			= ehci_stop,
	.shutdown		= ehci_shutdown,

	.get_frame_number	= ehci_get_frame,

	.urb_enqueue		= ehci_urb_enqueue,
	.urb_dequeue		= ehci_urb_dequeue,
	.endpoint_disable	= ehci_endpoint_disable,
	.endpoint_reset		= ehci_endpoint_reset,

	.hub_status_data	= ehci_hub_status_data,
	.hub_control		= ehci_hub_control,
	.bus_suspend		= ehci_bus_suspend,
	.bus_resume		= ehci_bus_resume,

	.relinquish_port	= ehci_relinquish_port,
	.port_handed_over	= ehci_port_handed_over,

	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
};

static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci)
{
	struct platform_device *pdev = to_platform_device(s5p_ehci->dev);

	if (s5p_ehci->phy)
		usb_phy_init(s5p_ehci->phy);
	else if (s5p_ehci->pdata->phy_init)
		s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
}

static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci)
{
	struct platform_device *pdev = to_platform_device(s5p_ehci->dev);

	if (s5p_ehci->phy)
		usb_phy_shutdown(s5p_ehci->phy);
	else if (s5p_ehci->pdata->phy_exit)
		s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
}

static void s5p_setup_vbus_gpio(struct platform_device *pdev)
{
	int err;
	int gpio;

	if (!pdev->dev.of_node)
		return;

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

	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
	if (err)
		dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
}

static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);

static int s5p_ehci_probe(struct platform_device *pdev)
{
	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
	struct s5p_ehci_hcd *s5p_ehci;
	struct usb_hcd *hcd;
	struct ehci_hcd *ehci;
	struct resource *res;
	struct usb_phy *phy;
	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.
	 */
	if (!pdev->dev.dma_mask)
		pdev->dev.dma_mask = &ehci_s5p_dma_mask;
	if (!pdev->dev.coherent_dma_mask)
		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	s5p_setup_vbus_gpio(pdev);

	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
				GFP_KERNEL);
	if (!s5p_ehci)
		return -ENOMEM;

	phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
	if (IS_ERR_OR_NULL(phy)) {
		/* Fallback to pdata */
		if (!pdata) {
			dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
			return -EPROBE_DEFER;
		} else {
			s5p_ehci->pdata = pdata;
		}
	} else {
		s5p_ehci->phy = phy;
		s5p_ehci->otg = phy->otg;
	}

	s5p_ehci->dev = &pdev->dev;

	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
					dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Unable to create HCD\n");
		return -ENOMEM;
	}

	s5p_ehci->hcd = hcd;
	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");

	if (IS_ERR(s5p_ehci->clk)) {
		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
		err = PTR_ERR(s5p_ehci->clk);
		goto fail_clk;
	}

	err = clk_prepare_enable(s5p_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 (s5p_ehci->otg)
		s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);

	s5p_ehci_phy_enable(s5p_ehci);

	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;
	}

	platform_set_drvdata(pdev, s5p_ehci);

	return 0;

fail_add_hcd:
	s5p_ehci_phy_disable(s5p_ehci);
fail_io:
	clk_disable_unprepare(s5p_ehci->clk);
fail_clk:
	usb_put_hcd(hcd);
	return err;
}

static int s5p_ehci_remove(struct platform_device *pdev)
{
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	usb_remove_hcd(hcd);

	if (s5p_ehci->otg)
		s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);

	s5p_ehci_phy_disable(s5p_ehci);

	clk_disable_unprepare(s5p_ehci->clk);

	usb_put_hcd(hcd);

	return 0;
}

static void s5p_ehci_shutdown(struct platform_device *pdev)
{
	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

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

#ifdef CONFIG_PM
static int s5p_ehci_suspend(struct device *dev)
{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;
	bool do_wakeup = device_may_wakeup(dev);
	int rc;

	rc = ehci_suspend(hcd, do_wakeup);

	if (s5p_ehci->otg)
		s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);

	s5p_ehci_phy_disable(s5p_ehci);

	clk_disable_unprepare(s5p_ehci->clk);

	return rc;
}

static int s5p_ehci_resume(struct device *dev)
{
	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	struct usb_hcd *hcd = s5p_ehci->hcd;

	clk_prepare_enable(s5p_ehci->clk);

	if (s5p_ehci->otg)
		s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);

	s5p_ehci_phy_enable(s5p_ehci);

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

	ehci_resume(hcd, false);
	return 0;
}
#else
#define s5p_ehci_suspend	NULL
#define s5p_ehci_resume		NULL
#endif

static const struct dev_pm_ops s5p_ehci_pm_ops = {
	.suspend	= s5p_ehci_suspend,
	.resume		= s5p_ehci_resume,
};

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

static struct platform_driver s5p_ehci_driver = {
	.probe		= s5p_ehci_probe,
	.remove		= s5p_ehci_remove,
	.shutdown	= s5p_ehci_shutdown,
	.driver = {
		.name	= "s5p-ehci",
		.owner	= THIS_MODULE,
		.pm	= &s5p_ehci_pm_ops,
		.of_match_table = of_match_ptr(exynos_ehci_match),
	}
};

MODULE_ALIAS("platform:s5p-ehci");
Commit	Line	Data
1bcc5aa8 JS	1	/*
	2	* SAMSUNG S5P USB HOST EHCI Controller
	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>
2c026e2b	16	#include <linux/of.h>
1bcc5aa8	17	#include <linux/platform_device.h>
fd81d59c	18	#include <linux/of_gpio.h>
436d42c6	19	#include <linux/platform_data/usb-ehci-s5p.h>
d233c196	20	#include <linux/usb/phy.h>
b506eebc	21	#include <linux/usb/samsung_usb_phy.h>
1bcc5aa8 JS	22	#include <plat/usb-phy.h>
1bcc5aa8 JS	23
88555a63 JH	24	#define EHCI_INSNREG00(base) (base + 0x90)
	25	#define EHCI_INSNREG00_ENA_INCR16 (0x1 << 25)
	26	#define EHCI_INSNREG00_ENA_INCR8 (0x1 << 24)
	27	#define EHCI_INSNREG00_ENA_INCR4 (0x1 << 23)
	28	#define EHCI_INSNREG00_ENA_INCRX_ALIGN (0x1 << 22)
	29	#define EHCI_INSNREG00_ENABLE_DMA_BURST \
	30	(EHCI_INSNREG00_ENA_INCR16 \| EHCI_INSNREG00_ENA_INCR8 \| \
	31	EHCI_INSNREG00_ENA_INCR4 \| EHCI_INSNREG00_ENA_INCRX_ALIGN)
	32
1bcc5aa8 JS	33	struct s5p_ehci_hcd {
	34	struct device *dev;
	35	struct usb_hcd *hcd;
	36	struct clk *clk;
d233c196 VG	37	struct usb_phy *phy;
	38	struct usb_otg *otg;
	39	struct s5p_ehci_platdata *pdata;
1bcc5aa8 JS	40	};
	41
	42	static const struct hc_driver s5p_ehci_hc_driver = {
	43	.description = hcd_name,
	44	.product_desc = "S5P EHCI Host Controller",
	45	.hcd_priv_size = sizeof(struct ehci_hcd),
	46
	47	.irq = ehci_irq,
	48	.flags = HCD_MEMORY \| HCD_USB2,
	49
1a49e2ac	50	.reset = ehci_setup,
1bcc5aa8 JS	51	.start = ehci_run,
	52	.stop = ehci_stop,
	53	.shutdown = ehci_shutdown,
	54
	55	.get_frame_number = ehci_get_frame,
	56
	57	.urb_enqueue = ehci_urb_enqueue,
	58	.urb_dequeue = ehci_urb_dequeue,
	59	.endpoint_disable = ehci_endpoint_disable,
	60	.endpoint_reset = ehci_endpoint_reset,
	61
	62	.hub_status_data = ehci_hub_status_data,
	63	.hub_control = ehci_hub_control,
	64	.bus_suspend = ehci_bus_suspend,
	65	.bus_resume = ehci_bus_resume,
	66
	67	.relinquish_port = ehci_relinquish_port,
	68	.port_handed_over = ehci_port_handed_over,
	69
	70	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
	71	};
	72
d233c196 VG	73	static void s5p_ehci_phy_enable(struct s5p_ehci_hcd *s5p_ehci)
	74	{
	75	struct platform_device *pdev = to_platform_device(s5p_ehci->dev);
	76
	77	if (s5p_ehci->phy)
	78	usb_phy_init(s5p_ehci->phy);
	79	else if (s5p_ehci->pdata->phy_init)
	80	s5p_ehci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
	81	}
	82
	83	static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci)
	84	{
	85	struct platform_device *pdev = to_platform_device(s5p_ehci->dev);
	86
	87	if (s5p_ehci->phy)
	88	usb_phy_shutdown(s5p_ehci->phy);
	89	else if (s5p_ehci->pdata->phy_exit)
	90	s5p_ehci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
	91	}
	92
fd81d59c VG	93	static void s5p_setup_vbus_gpio(struct platform_device *pdev)
	94	{
	95	int err;
	96	int gpio;
	97
	98	if (!pdev->dev.of_node)
	99	return;
	100
	101	gpio = of_get_named_gpio(pdev->dev.of_node,
	102	"samsung,vbus-gpio", 0);
	103	if (!gpio_is_valid(gpio))
	104	return;
	105
	106	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
	107	if (err)
	108	dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
	109	}
	110
2c026e2b VG	111	static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
2c026e2b VG	112
41ac7b3a	113	static int s5p_ehci_probe(struct platform_device *pdev)
1bcc5aa8	114	{
d233c196	115	struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
1bcc5aa8 JS	116	struct s5p_ehci_hcd *s5p_ehci;
	117	struct usb_hcd *hcd;
	118	struct ehci_hcd *ehci;
	119	struct resource *res;
d233c196	120	struct usb_phy *phy;
1bcc5aa8 JS	121	int irq;
	122	int err;
	123
2c026e2b VG	124	/*
	125	* Right now device-tree probed devices don't get dma_mask set.
	126	* Since shared usb code relies on it, set it here for now.
	127	* Once we move to full device tree support this will vanish off.
	128	*/
	129	if (!pdev->dev.dma_mask)
	130	pdev->dev.dma_mask = &ehci_s5p_dma_mask;
	131	if (!pdev->dev.coherent_dma_mask)
	132	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	133
fd81d59c VG	134	s5p_setup_vbus_gpio(pdev);
fd81d59c VG	135
9cb07563 JH	136	s5p_ehci = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
9cb07563 JH	137	GFP_KERNEL);
1bcc5aa8 JS	138	if (!s5p_ehci)
	139	return -ENOMEM;
	140
d233c196 VG	141	phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
	142	if (IS_ERR_OR_NULL(phy)) {
	143	/* Fallback to pdata */
	144	if (!pdata) {
	145	dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
	146	return -EPROBE_DEFER;
	147	} else {
	148	s5p_ehci->pdata = pdata;
	149	}
	150	} else {
	151	s5p_ehci->phy = phy;
	152	s5p_ehci->otg = phy->otg;
	153	}
	154
1bcc5aa8 JS	155	s5p_ehci->dev = &pdev->dev;
	156
	157	hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
	158	dev_name(&pdev->dev));
	159	if (!hcd) {
	160	dev_err(&pdev->dev, "Unable to create HCD\n");
9cb07563	161	return -ENOMEM;
1bcc5aa8 JS	162	}
1bcc5aa8 JS	163
e5d3d446	164	s5p_ehci->hcd = hcd;
63fd0ae4	165	s5p_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
1bcc5aa8 JS	166
	167	if (IS_ERR(s5p_ehci->clk)) {
	168	dev_err(&pdev->dev, "Failed to get usbhost clock\n");
	169	err = PTR_ERR(s5p_ehci->clk);
	170	goto fail_clk;
	171	}
	172
e1deb56c	173	err = clk_prepare_enable(s5p_ehci->clk);
1bcc5aa8	174	if (err)
63fd0ae4	175	goto fail_clk;
1bcc5aa8 JS	176
	177	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	178	if (!res) {
	179	dev_err(&pdev->dev, "Failed to get I/O memory\n");
	180	err = -ENXIO;
	181	goto fail_io;
	182	}
	183
	184	hcd->rsrc_start = res->start;
	185	hcd->rsrc_len = resource_size(res);
9cb07563	186	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
1bcc5aa8 JS	187	if (!hcd->regs) {
	188	dev_err(&pdev->dev, "Failed to remap I/O memory\n");
	189	err = -ENOMEM;
	190	goto fail_io;
	191	}
	192
	193	irq = platform_get_irq(pdev, 0);
	194	if (!irq) {
	195	dev_err(&pdev->dev, "Failed to get IRQ\n");
	196	err = -ENODEV;
9cb07563	197	goto fail_io;
1bcc5aa8 JS	198	}
1bcc5aa8 JS	199
d233c196 VG	200	if (s5p_ehci->otg)
	201	s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
	202
	203	s5p_ehci_phy_enable(s5p_ehci);
1bcc5aa8 JS	204
	205	ehci = hcd_to_ehci(hcd);
	206	ehci->caps = hcd->regs;
1bcc5aa8	207
88555a63 JH	208	/* DMA burst Enable */
	209	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	210
b5dd18d8	211	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
1bcc5aa8 JS	212	if (err) {
1bcc5aa8 JS	213	dev_err(&pdev->dev, "Failed to add USB HCD\n");
d233c196	214	goto fail_add_hcd;
1bcc5aa8 JS	215	}
	216
	217	platform_set_drvdata(pdev, s5p_ehci);
	218
	219	return 0;
	220
d233c196 VG	221	fail_add_hcd:
d233c196 VG	222	s5p_ehci_phy_disable(s5p_ehci);
1bcc5aa8	223	fail_io:
e1deb56c	224	clk_disable_unprepare(s5p_ehci->clk);
1bcc5aa8 JS	225	fail_clk:
1bcc5aa8 JS	226	usb_put_hcd(hcd);
1bcc5aa8 JS	227	return err;
	228	}
	229
fb4e98ab	230	static int s5p_ehci_remove(struct platform_device *pdev)
1bcc5aa8	231	{
1bcc5aa8 JS	232	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	233	struct usb_hcd *hcd = s5p_ehci->hcd;
	234
	235	usb_remove_hcd(hcd);
	236
d233c196 VG	237	if (s5p_ehci->otg)
	238	s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
	239
	240	s5p_ehci_phy_disable(s5p_ehci);
1bcc5aa8	241
e1deb56c	242	clk_disable_unprepare(s5p_ehci->clk);
1bcc5aa8 JS	243
1bcc5aa8 JS	244	usb_put_hcd(hcd);
1bcc5aa8 JS	245
	246	return 0;
	247	}
	248
	249	static void s5p_ehci_shutdown(struct platform_device *pdev)
	250	{
	251	struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
	252	struct usb_hcd *hcd = s5p_ehci->hcd;
	253
	254	if (hcd->driver->shutdown)
	255	hcd->driver->shutdown(hcd);
	256	}
	257
1acb30ef JH	258	#ifdef CONFIG_PM
	259	static int s5p_ehci_suspend(struct device *dev)
	260	{
	261	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	262	struct usb_hcd *hcd = s5p_ehci->hcd;
c5cf9212	263	bool do_wakeup = device_may_wakeup(dev);
c5cf9212	264	int rc;
1acb30ef	265
c5cf9212	266	rc = ehci_suspend(hcd, do_wakeup);
1acb30ef	267
d233c196 VG	268	if (s5p_ehci->otg)
	269	s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
	270
	271	s5p_ehci_phy_disable(s5p_ehci);
1acb30ef	272
e1deb56c	273	clk_disable_unprepare(s5p_ehci->clk);
8b4fc8c7	274
1acb30ef JH	275	return rc;
	276	}
	277
	278	static int s5p_ehci_resume(struct device *dev)
	279	{
	280	struct s5p_ehci_hcd *s5p_ehci = dev_get_drvdata(dev);
	281	struct usb_hcd *hcd = s5p_ehci->hcd;
1acb30ef	282
e1deb56c	283	clk_prepare_enable(s5p_ehci->clk);
8b4fc8c7	284
d233c196 VG	285	if (s5p_ehci->otg)
	286	s5p_ehci->otg->set_host(s5p_ehci->otg, &s5p_ehci->hcd->self);
	287
	288	s5p_ehci_phy_enable(s5p_ehci);
1acb30ef	289
88555a63 JH	290	/* DMA burst Enable */
	291	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
	292
c5cf9212	293	ehci_resume(hcd, false);
1acb30ef JH	294	return 0;
	295	}
	296	#else
	297	#define s5p_ehci_suspend NULL
	298	#define s5p_ehci_resume NULL
	299	#endif
	300
	301	static const struct dev_pm_ops s5p_ehci_pm_ops = {
	302	.suspend = s5p_ehci_suspend,
	303	.resume = s5p_ehci_resume,
	304	};
	305
2c026e2b VG	306	#ifdef CONFIG_OF
2c026e2b VG	307	static const struct of_device_id exynos_ehci_match[] = {
6e247777	308	{ .compatible = "samsung,exynos4210-ehci" },
2c026e2b VG	309	{},
	310	};
	311	MODULE_DEVICE_TABLE(of, exynos_ehci_match);
	312	#endif
	313
1bcc5aa8 JS	314	static struct platform_driver s5p_ehci_driver = {
1bcc5aa8 JS	315	.probe = s5p_ehci_probe,
7690417d	316	.remove = s5p_ehci_remove,
1bcc5aa8 JS	317	.shutdown = s5p_ehci_shutdown,
	318	.driver = {
	319	.name = "s5p-ehci",
	320	.owner = THIS_MODULE,
1acb30ef	321	.pm = &s5p_ehci_pm_ops,
2c026e2b	322	.of_match_table = of_match_ptr(exynos_ehci_match),
1bcc5aa8 JS	323	}
	324	};
	325
	326	MODULE_ALIAS("platform:s5p-ehci");