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

/*
 * Generic platform ehci driver
 *
 * Copyright 2007 Steven Brown <sbrown@cortland.com>
 * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
 *
 * Derived from the ohci-ssb driver
 * Copyright 2007 Michael Buesch <m@bues.ch>
 *
 * Derived from the EHCI-PCI driver
 * Copyright (c) 2000-2004 by David Brownell
 *
 * Derived from the ohci-pci driver
 * Copyright 1999 Roman Weissgaerber
 * Copyright 2000-2002 David Brownell
 * Copyright 1999 Linus Torvalds
 * Copyright 1999 Gregory P. Smith
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ehci_pdriver.h>

#include "ehci.h"

#define DRIVER_DESC "EHCI generic platform driver"
#define EHCI_MAX_CLKS 3
#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)

struct ehci_platform_priv {
	struct clk *clks[EHCI_MAX_CLKS];
	struct phy *phy;
};

static const char hcd_name[] = "ehci-platform";

static int ehci_platform_reset(struct usb_hcd *hcd)
{
	struct platform_device *pdev = to_platform_device(hcd->self.controller);
	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	int retval;

	hcd->has_tt = pdata->has_tt;
	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;

	if (pdata->pre_setup) {
		retval = pdata->pre_setup(hcd);
		if (retval < 0)
			return retval;
	}

	ehci->caps = hcd->regs + pdata->caps_offset;
	retval = ehci_setup(hcd);
	if (retval)
		return retval;

	if (pdata->no_io_watchdog)
		ehci->need_io_watchdog = 0;
	return 0;
}

static int ehci_platform_power_on(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	int clk, ret;

	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
		ret = clk_prepare_enable(priv->clks[clk]);
		if (ret)
			goto err_disable_clks;
	}

	if (priv->phy) {
		ret = phy_init(priv->phy);
		if (ret)
			goto err_disable_clks;

		ret = phy_power_on(priv->phy);
		if (ret)
			goto err_exit_phy;
	}

	return 0;

err_exit_phy:
	phy_exit(priv->phy);
err_disable_clks:
	while (--clk >= 0)
		clk_disable_unprepare(priv->clks[clk]);

	return ret;
}

static void ehci_platform_power_off(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	int clk;

	if (priv->phy) {
		phy_power_off(priv->phy);
		phy_exit(priv->phy);
	}

	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
		if (priv->clks[clk])
			clk_disable_unprepare(priv->clks[clk]);
}

static struct hc_driver __read_mostly ehci_platform_hc_driver;

static const struct ehci_driver_overrides platform_overrides __initconst = {
	.reset =		ehci_platform_reset,
	.extra_priv_size =	sizeof(struct ehci_platform_priv),
};

static struct usb_ehci_pdata ehci_platform_defaults = {
	.power_on =		ehci_platform_power_on,
	.power_suspend =	ehci_platform_power_off,
	.power_off =		ehci_platform_power_off,
};

static int ehci_platform_probe(struct platform_device *dev)
{
	struct usb_hcd *hcd;
	struct resource *res_mem;
	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
	struct ehci_platform_priv *priv;
	struct ehci_hcd *ehci;
	int err, irq, clk = 0;

	if (usb_disabled())
		return -ENODEV;

	/*
	 * Use reasonable defaults so platforms don't have to provide these
	 * with DT probing on ARM.
	 */
	if (!pdata)
		pdata = &ehci_platform_defaults;

	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
	if (err)
		return err;

	irq = platform_get_irq(dev, 0);
	if (irq < 0) {
		dev_err(&dev->dev, "no irq provided");
		return irq;
	}
	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	if (!res_mem) {
		dev_err(&dev->dev, "no memory resource provided");
		return -ENXIO;
	}

	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
			     dev_name(&dev->dev));
	if (!hcd)
		return -ENOMEM;

	platform_set_drvdata(dev, hcd);
	dev->dev.platform_data = pdata;
	priv = hcd_to_ehci_priv(hcd);
	ehci = hcd_to_ehci(hcd);

	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
		if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
			ehci->big_endian_mmio = 1;

		if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
			ehci->big_endian_desc = 1;

		if (of_property_read_bool(dev->dev.of_node, "big-endian"))
			ehci->big_endian_mmio = ehci->big_endian_desc = 1;

		priv->phy = devm_phy_get(&dev->dev, "usb");
		if (IS_ERR(priv->phy)) {
			err = PTR_ERR(priv->phy);
			if (err == -EPROBE_DEFER)
				goto err_put_hcd;
			priv->phy = NULL;
		}

		for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
			priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
			if (IS_ERR(priv->clks[clk])) {
				err = PTR_ERR(priv->clks[clk]);
				if (err == -EPROBE_DEFER)
					goto err_put_clks;
				priv->clks[clk] = NULL;
				break;
			}
		}
	}

	if (pdata->big_endian_desc)
		ehci->big_endian_desc = 1;
	if (pdata->big_endian_mmio)
		ehci->big_endian_mmio = 1;

#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	if (ehci->big_endian_mmio) {
		dev_err(&dev->dev,
			"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
		err = -EINVAL;
		goto err_put_clks;
	}
#endif
#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	if (ehci->big_endian_desc) {
		dev_err(&dev->dev,
			"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
		err = -EINVAL;
		goto err_put_clks;
	}
#endif

	if (pdata->power_on) {
		err = pdata->power_on(dev);
		if (err < 0)
			goto err_put_clks;
	}

	hcd->rsrc_start = res_mem->start;
	hcd->rsrc_len = resource_size(res_mem);

	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	if (IS_ERR(hcd->regs)) {
		err = PTR_ERR(hcd->regs);
		goto err_power;
	}
	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (err)
		goto err_power;

	device_wakeup_enable(hcd->self.controller);
	platform_set_drvdata(dev, hcd);

	return err;

err_power:
	if (pdata->power_off)
		pdata->power_off(dev);
err_put_clks:
	while (--clk >= 0)
		clk_put(priv->clks[clk]);
err_put_hcd:
	if (pdata == &ehci_platform_defaults)
		dev->dev.platform_data = NULL;

	usb_put_hcd(hcd);

	return err;
}

static int ehci_platform_remove(struct platform_device *dev)
{
	struct usb_hcd *hcd = platform_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	int clk;

	usb_remove_hcd(hcd);

	if (pdata->power_off)
		pdata->power_off(dev);

	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
		clk_put(priv->clks[clk]);

	usb_put_hcd(hcd);

	if (pdata == &ehci_platform_defaults)
		dev->dev.platform_data = NULL;

	return 0;
}

#ifdef CONFIG_PM

static int ehci_platform_suspend(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);
	bool do_wakeup = device_may_wakeup(dev);
	int ret;

	ret = ehci_suspend(hcd, do_wakeup);

	if (pdata->power_suspend)
		pdata->power_suspend(pdev);

	return ret;
}

static int ehci_platform_resume(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
	struct platform_device *pdev =
		container_of(dev, struct platform_device, dev);

	if (pdata->power_on) {
		int err = pdata->power_on(pdev);
		if (err < 0)
			return err;
	}

	ehci_resume(hcd, false);
	return 0;
}

#else /* !CONFIG_PM */
#define ehci_platform_suspend	NULL
#define ehci_platform_resume	NULL
#endif /* CONFIG_PM */

static const struct of_device_id vt8500_ehci_ids[] = {
	{ .compatible = "via,vt8500-ehci", },
	{ .compatible = "wm,prizm-ehci", },
	{ .compatible = "generic-ehci", },
	{}
};
MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);

static const struct platform_device_id ehci_platform_table[] = {
	{ "ehci-platform", 0 },
	{ }
};
MODULE_DEVICE_TABLE(platform, ehci_platform_table);

static const struct dev_pm_ops ehci_platform_pm_ops = {
	.suspend	= ehci_platform_suspend,
	.resume		= ehci_platform_resume,
};

static struct platform_driver ehci_platform_driver = {
	.id_table	= ehci_platform_table,
	.probe		= ehci_platform_probe,
	.remove		= ehci_platform_remove,
	.shutdown	= usb_hcd_platform_shutdown,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "ehci-platform",
		.pm	= &ehci_platform_pm_ops,
		.of_match_table = vt8500_ehci_ids,
	}
};

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

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);

	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	return platform_driver_register(&ehci_platform_driver);
}
module_init(ehci_platform_init);

static void __exit ehci_platform_cleanup(void)
{
	platform_driver_unregister(&ehci_platform_driver);
}
module_exit(ehci_platform_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");
Commit	Line	Data
7a7a4a59 HM	1	/*
	2	* Generic platform ehci driver
	3	*
	4	* Copyright 2007 Steven Brown <sbrown@cortland.com>
	5	* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
a4aeb211	6	* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
7a7a4a59 HM	7	*
	8	* Derived from the ohci-ssb driver
	9	* Copyright 2007 Michael Buesch <m@bues.ch>
	10	*
	11	* Derived from the EHCI-PCI driver
	12	* Copyright (c) 2000-2004 by David Brownell
	13	*
	14	* Derived from the ohci-pci driver
	15	* Copyright 1999 Roman Weissgaerber
	16	* Copyright 2000-2002 David Brownell
	17	* Copyright 1999 Linus Torvalds
	18	* Copyright 1999 Gregory P. Smith
	19	*
	20	* Licensed under the GNU/GPL. See COPYING for details.
	21	*/
a4aeb211	22	#include <linux/clk.h>
f3bc64d6	23	#include <linux/dma-mapping.h>
148e1134	24	#include <linux/err.h>
99f91934	25	#include <linux/kernel.h>
d1bb67a7 AS	26	#include <linux/hrtimer.h>
d1bb67a7 AS	27	#include <linux/io.h>
99f91934	28	#include <linux/module.h>
f3bc64d6	29	#include <linux/of.h>
a4aeb211	30	#include <linux/phy/phy.h>
7a7a4a59	31	#include <linux/platform_device.h>
99f91934 AS	32	#include <linux/usb.h>
99f91934 AS	33	#include <linux/usb/hcd.h>
7a7a4a59 HM	34	#include <linux/usb/ehci_pdriver.h>
7a7a4a59 HM	35
99f91934 AS	36	#include "ehci.h"
	37
	38	#define DRIVER_DESC "EHCI generic platform driver"
a4aeb211 HG	39	#define EHCI_MAX_CLKS 3
	40	#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
	41
	42	struct ehci_platform_priv {
	43	struct clk *clks[EHCI_MAX_CLKS];
	44	struct phy *phy;
	45	};
99f91934 AS	46
	47	static const char hcd_name[] = "ehci-platform";
	48
7a7a4a59 HM	49	static int ehci_platform_reset(struct usb_hcd *hcd)
	50	{
	51	struct platform_device *pdev = to_platform_device(hcd->self.controller);
d4f09e28	52	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
7a7a4a59 HM	53	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	54	int retval;
	55
	56	hcd->has_tt = pdata->has_tt;
	57	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
7a7a4a59	58
743fcce0 SS	59	if (pdata->pre_setup) {
	60	retval = pdata->pre_setup(hcd);
	61	if (retval < 0)
	62	return retval;
	63	}
	64
7a7a4a59 HM	65	ehci->caps = hcd->regs + pdata->caps_offset;
	66	retval = ehci_setup(hcd);
	67	if (retval)
	68	return retval;
	69
4534874a FF	70	if (pdata->no_io_watchdog)
4534874a FF	71	ehci->need_io_watchdog = 0;
7a7a4a59 HM	72	return 0;
	73	}
	74
a4aeb211 HG	75	static int ehci_platform_power_on(struct platform_device *dev)
	76	{
	77	struct usb_hcd *hcd = platform_get_drvdata(dev);
	78	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	79	int clk, ret;
	80
	81	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	82	ret = clk_prepare_enable(priv->clks[clk]);
	83	if (ret)
	84	goto err_disable_clks;
	85	}
	86
	87	if (priv->phy) {
	88	ret = phy_init(priv->phy);
	89	if (ret)
	90	goto err_disable_clks;
	91
	92	ret = phy_power_on(priv->phy);
	93	if (ret)
	94	goto err_exit_phy;
	95	}
	96
	97	return 0;
	98
	99	err_exit_phy:
	100	phy_exit(priv->phy);
	101	err_disable_clks:
	102	while (--clk >= 0)
	103	clk_disable_unprepare(priv->clks[clk]);
	104
	105	return ret;
	106	}
	107
	108	static void ehci_platform_power_off(struct platform_device *dev)
	109	{
	110	struct usb_hcd *hcd = platform_get_drvdata(dev);
	111	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	112	int clk;
	113
	114	if (priv->phy) {
	115	phy_power_off(priv->phy);
	116	phy_exit(priv->phy);
	117	}
	118
	119	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
	120	if (priv->clks[clk])
	121	clk_disable_unprepare(priv->clks[clk]);
	122	}
	123
99f91934	124	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	125
62d08a11	126	static const struct ehci_driver_overrides platform_overrides __initconst = {
a4aeb211 HG	127	.reset = ehci_platform_reset,
a4aeb211 HG	128	.extra_priv_size = sizeof(struct ehci_platform_priv),
7a7a4a59 HM	129	};
7a7a4a59 HM	130
a4aeb211 HG	131	static struct usb_ehci_pdata ehci_platform_defaults = {
	132	.power_on = ehci_platform_power_on,
	133	.power_suspend = ehci_platform_power_off,
	134	.power_off = ehci_platform_power_off,
	135	};
f3bc64d6	136
41ac7b3a	137	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	138	{
	139	struct usb_hcd *hcd;
	140	struct resource *res_mem;
a4aeb211 HG	141	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	142	struct ehci_platform_priv *priv;
ad3db5da	143	struct ehci_hcd *ehci;
a4aeb211	144	int err, irq, clk = 0;
7a7a4a59	145
7a7a4a59 HM	146	if (usb_disabled())
	147	return -ENODEV;
	148
f3bc64d6	149	/*
a4aeb211 HG	150	* Use reasonable defaults so platforms don't have to provide these
a4aeb211 HG	151	* with DT probing on ARM.
f3bc64d6	152	*/
a4aeb211 HG	153	if (!pdata)
a4aeb211 HG	154	pdata = &ehci_platform_defaults;
e1fd7341 RK	155
e1fd7341 RK	156	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	157	if (err)
22d9d8e8 RK	158	return err;
f3bc64d6	159
7a7a4a59 HM	160	irq = platform_get_irq(dev, 0);
7a7a4a59 HM	161	if (irq < 0) {
2350cb0c	162	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	163	return irq;
	164	}
	165	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	166	if (!res_mem) {
5c9b2b28	167	dev_err(&dev->dev, "no memory resource provided");
7a7a4a59 HM	168	return -ENXIO;
	169	}
	170
a4aeb211 HG	171	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
	172	dev_name(&dev->dev));
	173	if (!hcd)
	174	return -ENOMEM;
	175
	176	platform_set_drvdata(dev, hcd);
	177	dev->dev.platform_data = pdata;
	178	priv = hcd_to_ehci_priv(hcd);
ad3db5da	179	ehci = hcd_to_ehci(hcd);
a4aeb211 HG	180
a4aeb211 HG	181	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
ad3db5da HG	182	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	183	ehci->big_endian_mmio = 1;
	184
	185	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	186	ehci->big_endian_desc = 1;
	187
	188	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	189	ehci->big_endian_mmio = ehci->big_endian_desc = 1;
	190
a4aeb211 HG	191	priv->phy = devm_phy_get(&dev->dev, "usb");
	192	if (IS_ERR(priv->phy)) {
	193	err = PTR_ERR(priv->phy);
	194	if (err == -EPROBE_DEFER)
	195	goto err_put_hcd;
	196	priv->phy = NULL;
	197	}
	198
	199	for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
	200	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	201	if (IS_ERR(priv->clks[clk])) {
	202	err = PTR_ERR(priv->clks[clk]);
	203	if (err == -EPROBE_DEFER)
	204	goto err_put_clks;
	205	priv->clks[clk] = NULL;
	206	break;
	207	}
	208	}
	209	}
	210
843d5e03 AS	211	if (pdata->big_endian_desc)
	212	ehci->big_endian_desc = 1;
	213	if (pdata->big_endian_mmio)
	214	ehci->big_endian_mmio = 1;
	215
	216	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	217	if (ehci->big_endian_mmio) {
	218	dev_err(&dev->dev,
	219	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	220	err = -EINVAL;
	221	goto err_put_clks;
	222	}
	223	#endif
	224	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	225	if (ehci->big_endian_desc) {
	226	dev_err(&dev->dev,
	227	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	228	err = -EINVAL;
	229	goto err_put_clks;
	230	}
	231	#endif
	232
04216bed KM	233	if (pdata->power_on) {
	234	err = pdata->power_on(dev);
	235	if (err < 0)
a4aeb211	236	goto err_put_clks;
04216bed	237	}
7a7a4a59 HM	238
	239	hcd->rsrc_start = res_mem->start;
	240	hcd->rsrc_len = resource_size(res_mem);
	241
148e1134 TR	242	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	243	if (IS_ERR(hcd->regs)) {
	244	err = PTR_ERR(hcd->regs);
a4aeb211	245	goto err_power;
ec03ad85	246	}
7a7a4a59 HM	247	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	248	if (err)
a4aeb211	249	goto err_power;
7a7a4a59	250
3c9740a1	251	device_wakeup_enable(hcd->self.controller);
7a7a4a59 HM	252	platform_set_drvdata(dev, hcd);
	253
	254	return err;
	255
04216bed KM	256	err_power:
	257	if (pdata->power_off)
	258	pdata->power_off(dev);
a4aeb211 HG	259	err_put_clks:
	260	while (--clk >= 0)
	261	clk_put(priv->clks[clk]);
	262	err_put_hcd:
	263	if (pdata == &ehci_platform_defaults)
	264	dev->dev.platform_data = NULL;
	265
	266	usb_put_hcd(hcd);
04216bed	267
7a7a4a59 HM	268	return err;
	269	}
	270
fb4e98ab	271	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	272	{
7a7a4a59 HM	273	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	274	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	275	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
a4aeb211 HG	276	int clk;
7a7a4a59 HM	277
7a7a4a59 HM	278	usb_remove_hcd(hcd);
7a7a4a59	279
04216bed KM	280	if (pdata->power_off)
	281	pdata->power_off(dev);
	282
a4aeb211 HG	283	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	284	clk_put(priv->clks[clk]);
	285
	286	usb_put_hcd(hcd);
	287
f3bc64d6 AB	288	if (pdata == &ehci_platform_defaults)
	289	dev->dev.platform_data = NULL;
	290
7a7a4a59 HM	291	return 0;
	292	}
	293
	294	#ifdef CONFIG_PM
	295
	296	static int ehci_platform_suspend(struct device *dev)
	297	{
	298	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	299	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	300	struct platform_device *pdev =
04216bed KM	301	container_of(dev, struct platform_device, dev);
c5cf9212	302	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	303	int ret;
	304
	305	ret = ehci_suspend(hcd, do_wakeup);
7a7a4a59	306
04216bed KM	307	if (pdata->power_suspend)
	308	pdata->power_suspend(pdev);
	309
	310	return ret;
7a7a4a59 HM	311	}
	312
	313	static int ehci_platform_resume(struct device *dev)
	314	{
	315	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	316	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	317	struct platform_device *pdev =
	318	container_of(dev, struct platform_device, dev);
	319
	320	if (pdata->power_on) {
	321	int err = pdata->power_on(pdev);
	322	if (err < 0)
	323	return err;
	324	}
7a7a4a59	325
c5cf9212	326	ehci_resume(hcd, false);
7a7a4a59 HM	327	return 0;
	328	}
	329
	330	#else /* !CONFIG_PM */
	331	#define ehci_platform_suspend NULL
	332	#define ehci_platform_resume NULL
	333	#endif /* CONFIG_PM */
	334
f3bc64d6 AB	335	static const struct of_device_id vt8500_ehci_ids[] = {
	336	{ .compatible = "via,vt8500-ehci", },
	337	{ .compatible = "wm,prizm-ehci", },
915974c3	338	{ .compatible = "generic-ehci", },
f3bc64d6 AB	339	{}
f3bc64d6 AB	340	};
a4aeb211	341	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	342
7a7a4a59 HM	343	static const struct platform_device_id ehci_platform_table[] = {
	344	{ "ehci-platform", 0 },
	345	{ }
	346	};
	347	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	348
	349	static const struct dev_pm_ops ehci_platform_pm_ops = {
	350	.suspend = ehci_platform_suspend,
	351	.resume = ehci_platform_resume,
	352	};
	353
	354	static struct platform_driver ehci_platform_driver = {
	355	.id_table = ehci_platform_table,
	356	.probe = ehci_platform_probe,
7690417d	357	.remove = ehci_platform_remove,
7a7a4a59 HM	358	.shutdown = usb_hcd_platform_shutdown,
	359	.driver = {
	360	.owner = THIS_MODULE,
	361	.name = "ehci-platform",
	362	.pm = &ehci_platform_pm_ops,
ae5e5f7b	363	.of_match_table = vt8500_ehci_ids,
7a7a4a59 HM	364	}
7a7a4a59 HM	365	};
99f91934 AS	366
	367	static int __init ehci_platform_init(void)
	368	{
	369	if (usb_disabled())
	370	return -ENODEV;
	371
	372	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	373
	374	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	375	return platform_driver_register(&ehci_platform_driver);
	376	}
	377	module_init(ehci_platform_init);
	378
	379	static void __exit ehci_platform_cleanup(void)
	380	{
	381	platform_driver_unregister(&ehci_platform_driver);
	382	}
	383	module_exit(ehci_platform_cleanup);
	384
	385	MODULE_DESCRIPTION(DRIVER_DESC);
	386	MODULE_AUTHOR("Hauke Mehrtens");
	387	MODULE_AUTHOR("Alan Stern");
	388	MODULE_LICENSE("GPL");