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

	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;

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