[mirror_ubuntu-artful-kernel.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/reset.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 reset_control *rst;
	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;
	}

	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;

		if (of_property_read_bool(dev->dev.of_node,
					  "needs-reset-on-resume"))
			pdata->reset_on_resume = 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;
			}
		}
	}

	priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
	if (IS_ERR(priv->rst)) {
		err = PTR_ERR(priv->rst);
		if (err == -EPROBE_DEFER)
			goto err_put_clks;
		priv->rst = NULL;
	} else {
		err = reset_control_deassert(priv->rst);
		if (err)
			goto err_put_clks;
	}

	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_reset;
	}
#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_reset;
	}
#endif

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

	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	if (IS_ERR(hcd->regs)) {
		err = PTR_ERR(hcd->regs);
		goto err_power;
	}
	hcd->rsrc_start = res_mem->start;
	hcd->rsrc_len = resource_size(res_mem);

	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_reset:
	if (priv->rst)
		reset_control_assert(priv->rst);
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);

	if (priv->rst)
		reset_control_assert(priv->rst);

	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_SLEEP
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 (ret)
		return ret;

	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, pdata->reset_on_resume);
	return 0;
}
#endif /* CONFIG_PM_SLEEP */

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 SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
	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		= {
		.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>
2d87bbd6	32	#include <linux/reset.h>
99f91934 AS	33	#include <linux/usb.h>
99f91934 AS	34	#include <linux/usb/hcd.h>
7a7a4a59 HM	35	#include <linux/usb/ehci_pdriver.h>
7a7a4a59 HM	36
99f91934 AS	37	#include "ehci.h"
	38
	39	#define DRIVER_DESC "EHCI generic platform driver"
a4aeb211 HG	40	#define EHCI_MAX_CLKS 3
	41	#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
	42
	43	struct ehci_platform_priv {
	44	struct clk *clks[EHCI_MAX_CLKS];
2d87bbd6	45	struct reset_control *rst;
a4aeb211 HG	46	struct phy *phy;
a4aeb211 HG	47	};
99f91934 AS	48
	49	static const char hcd_name[] = "ehci-platform";
	50
7a7a4a59 HM	51	static int ehci_platform_reset(struct usb_hcd *hcd)
	52	{
	53	struct platform_device *pdev = to_platform_device(hcd->self.controller);
d4f09e28	54	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
7a7a4a59 HM	55	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	56	int retval;
	57
	58	hcd->has_tt = pdata->has_tt;
	59	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
7a7a4a59	60
743fcce0 SS	61	if (pdata->pre_setup) {
	62	retval = pdata->pre_setup(hcd);
	63	if (retval < 0)
	64	return retval;
	65	}
	66
7a7a4a59 HM	67	ehci->caps = hcd->regs + pdata->caps_offset;
	68	retval = ehci_setup(hcd);
	69	if (retval)
	70	return retval;
	71
4534874a FF	72	if (pdata->no_io_watchdog)
4534874a FF	73	ehci->need_io_watchdog = 0;
7a7a4a59 HM	74	return 0;
	75	}
	76
a4aeb211 HG	77	static int ehci_platform_power_on(struct platform_device *dev)
	78	{
	79	struct usb_hcd *hcd = platform_get_drvdata(dev);
	80	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	81	int clk, ret;
	82
	83	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	84	ret = clk_prepare_enable(priv->clks[clk]);
	85	if (ret)
	86	goto err_disable_clks;
	87	}
	88
	89	if (priv->phy) {
	90	ret = phy_init(priv->phy);
	91	if (ret)
	92	goto err_disable_clks;
	93
	94	ret = phy_power_on(priv->phy);
	95	if (ret)
	96	goto err_exit_phy;
	97	}
	98
	99	return 0;
	100
	101	err_exit_phy:
	102	phy_exit(priv->phy);
	103	err_disable_clks:
	104	while (--clk >= 0)
	105	clk_disable_unprepare(priv->clks[clk]);
	106
	107	return ret;
	108	}
	109
	110	static void ehci_platform_power_off(struct platform_device *dev)
	111	{
	112	struct usb_hcd *hcd = platform_get_drvdata(dev);
	113	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	114	int clk;
	115
	116	if (priv->phy) {
	117	phy_power_off(priv->phy);
	118	phy_exit(priv->phy);
	119	}
	120
	121	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
	122	if (priv->clks[clk])
	123	clk_disable_unprepare(priv->clks[clk]);
	124	}
	125
99f91934	126	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	127
62d08a11	128	static const struct ehci_driver_overrides platform_overrides __initconst = {
a4aeb211 HG	129	.reset = ehci_platform_reset,
a4aeb211 HG	130	.extra_priv_size = sizeof(struct ehci_platform_priv),
7a7a4a59 HM	131	};
7a7a4a59 HM	132
a4aeb211 HG	133	static struct usb_ehci_pdata ehci_platform_defaults = {
	134	.power_on = ehci_platform_power_on,
	135	.power_suspend = ehci_platform_power_off,
	136	.power_off = ehci_platform_power_off,
	137	};
f3bc64d6	138
41ac7b3a	139	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	140	{
	141	struct usb_hcd *hcd;
	142	struct resource *res_mem;
a4aeb211 HG	143	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	144	struct ehci_platform_priv *priv;
ad3db5da	145	struct ehci_hcd *ehci;
a4aeb211	146	int err, irq, clk = 0;
7a7a4a59	147
7a7a4a59 HM	148	if (usb_disabled())
	149	return -ENODEV;
	150
f3bc64d6	151	/*
a4aeb211 HG	152	* Use reasonable defaults so platforms don't have to provide these
a4aeb211 HG	153	* with DT probing on ARM.
f3bc64d6	154	*/
a4aeb211 HG	155	if (!pdata)
a4aeb211 HG	156	pdata = &ehci_platform_defaults;
e1fd7341 RK	157
e1fd7341 RK	158	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	159	if (err)
22d9d8e8 RK	160	return err;
f3bc64d6	161
7a7a4a59 HM	162	irq = platform_get_irq(dev, 0);
7a7a4a59 HM	163	if (irq < 0) {
2350cb0c	164	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	165	return irq;
7a7a4a59 HM	166	}
7a7a4a59	167
a4aeb211 HG	168	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
	169	dev_name(&dev->dev));
	170	if (!hcd)
	171	return -ENOMEM;
	172
	173	platform_set_drvdata(dev, hcd);
	174	dev->dev.platform_data = pdata;
	175	priv = hcd_to_ehci_priv(hcd);
ad3db5da	176	ehci = hcd_to_ehci(hcd);
a4aeb211 HG	177
a4aeb211 HG	178	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
ad3db5da HG	179	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	180	ehci->big_endian_mmio = 1;
	181
	182	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	183	ehci->big_endian_desc = 1;
	184
	185	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	186	ehci->big_endian_mmio = ehci->big_endian_desc = 1;
	187
314b41b1 WL	188	if (of_property_read_bool(dev->dev.of_node,
	189	"needs-reset-on-resume"))
	190	pdata->reset_on_resume = 1;
	191
a4aeb211 HG	192	priv->phy = devm_phy_get(&dev->dev, "usb");
	193	if (IS_ERR(priv->phy)) {
	194	err = PTR_ERR(priv->phy);
	195	if (err == -EPROBE_DEFER)
	196	goto err_put_hcd;
	197	priv->phy = NULL;
	198	}
	199
	200	for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
	201	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	202	if (IS_ERR(priv->clks[clk])) {
	203	err = PTR_ERR(priv->clks[clk]);
	204	if (err == -EPROBE_DEFER)
	205	goto err_put_clks;
	206	priv->clks[clk] = NULL;
	207	break;
	208	}
	209	}
	210	}
	211
2d87bbd6 BB	212	priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
	213	if (IS_ERR(priv->rst)) {
	214	err = PTR_ERR(priv->rst);
	215	if (err == -EPROBE_DEFER)
	216	goto err_put_clks;
	217	priv->rst = NULL;
	218	} else {
	219	err = reset_control_deassert(priv->rst);
	220	if (err)
	221	goto err_put_clks;
	222	}
	223
843d5e03 AS	224	if (pdata->big_endian_desc)
	225	ehci->big_endian_desc = 1;
	226	if (pdata->big_endian_mmio)
	227	ehci->big_endian_mmio = 1;
	228
	229	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	230	if (ehci->big_endian_mmio) {
	231	dev_err(&dev->dev,
	232	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	233	err = -EINVAL;
2d87bbd6	234	goto err_reset;
843d5e03 AS	235	}
	236	#endif
	237	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	238	if (ehci->big_endian_desc) {
	239	dev_err(&dev->dev,
	240	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	241	err = -EINVAL;
2d87bbd6	242	goto err_reset;
843d5e03 AS	243	}
	244	#endif
	245
04216bed KM	246	if (pdata->power_on) {
	247	err = pdata->power_on(dev);
	248	if (err < 0)
2d87bbd6	249	goto err_reset;
04216bed	250	}
7a7a4a59	251
2062ff48	252	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	253	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	254	if (IS_ERR(hcd->regs)) {
	255	err = PTR_ERR(hcd->regs);
a4aeb211	256	goto err_power;
ec03ad85	257	}
2062ff48 VB	258	hcd->rsrc_start = res_mem->start;
	259	hcd->rsrc_len = resource_size(res_mem);
	260
7a7a4a59 HM	261	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	262	if (err)
a4aeb211	263	goto err_power;
7a7a4a59	264
3c9740a1	265	device_wakeup_enable(hcd->self.controller);
7a7a4a59 HM	266	platform_set_drvdata(dev, hcd);
	267
	268	return err;
	269
04216bed KM	270	err_power:
	271	if (pdata->power_off)
	272	pdata->power_off(dev);
2d87bbd6 BB	273	err_reset:
	274	if (priv->rst)
	275	reset_control_assert(priv->rst);
a4aeb211 HG	276	err_put_clks:
	277	while (--clk >= 0)
	278	clk_put(priv->clks[clk]);
	279	err_put_hcd:
	280	if (pdata == &ehci_platform_defaults)
	281	dev->dev.platform_data = NULL;
	282
	283	usb_put_hcd(hcd);
04216bed	284
7a7a4a59 HM	285	return err;
	286	}
	287
fb4e98ab	288	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	289	{
7a7a4a59 HM	290	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	291	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	292	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
a4aeb211 HG	293	int clk;
7a7a4a59 HM	294
7a7a4a59 HM	295	usb_remove_hcd(hcd);
7a7a4a59	296
04216bed KM	297	if (pdata->power_off)
	298	pdata->power_off(dev);
	299
2d87bbd6 BB	300	if (priv->rst)
	301	reset_control_assert(priv->rst);
	302
a4aeb211 HG	303	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	304	clk_put(priv->clks[clk]);
	305
	306	usb_put_hcd(hcd);
	307
f3bc64d6 AB	308	if (pdata == &ehci_platform_defaults)
	309	dev->dev.platform_data = NULL;
	310
7a7a4a59 HM	311	return 0;
	312	}
	313
5e4ccd9e	314	#ifdef CONFIG_PM_SLEEP
7a7a4a59 HM	315	static int ehci_platform_suspend(struct device *dev)
	316	{
	317	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	318	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	319	struct platform_device *pdev =
04216bed KM	320	container_of(dev, struct platform_device, dev);
c5cf9212	321	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	322	int ret;
	323
	324	ret = ehci_suspend(hcd, do_wakeup);
e155b5b8 VG	325	if (ret)
e155b5b8 VG	326	return ret;
7a7a4a59	327
04216bed KM	328	if (pdata->power_suspend)
	329	pdata->power_suspend(pdev);
	330
	331	return ret;
7a7a4a59 HM	332	}
	333
	334	static int ehci_platform_resume(struct device *dev)
	335	{
	336	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	337	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	338	struct platform_device *pdev =
	339	container_of(dev, struct platform_device, dev);
	340
	341	if (pdata->power_on) {
	342	int err = pdata->power_on(pdev);
	343	if (err < 0)
	344	return err;
	345	}
7a7a4a59	346
314b41b1	347	ehci_resume(hcd, pdata->reset_on_resume);
7a7a4a59 HM	348	return 0;
7a7a4a59 HM	349	}
5e4ccd9e	350	#endif /* CONFIG_PM_SLEEP */
7a7a4a59	351
f3bc64d6 AB	352	static const struct of_device_id vt8500_ehci_ids[] = {
	353	{ .compatible = "via,vt8500-ehci", },
	354	{ .compatible = "wm,prizm-ehci", },
915974c3	355	{ .compatible = "generic-ehci", },
f3bc64d6 AB	356	{}
f3bc64d6 AB	357	};
a4aeb211	358	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	359
7a7a4a59 HM	360	static const struct platform_device_id ehci_platform_table[] = {
	361	{ "ehci-platform", 0 },
	362	{ }
	363	};
	364	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	365
5e4ccd9e WK	366	static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
5e4ccd9e WK	367	ehci_platform_resume);
7a7a4a59 HM	368
	369	static struct platform_driver ehci_platform_driver = {
	370	.id_table = ehci_platform_table,
	371	.probe = ehci_platform_probe,
7690417d	372	.remove = ehci_platform_remove,
7a7a4a59 HM	373	.shutdown = usb_hcd_platform_shutdown,
7a7a4a59 HM	374	.driver = {
7a7a4a59 HM	375	.name = "ehci-platform",
7a7a4a59 HM	376	.pm = &ehci_platform_pm_ops,
ae5e5f7b	377	.of_match_table = vt8500_ehci_ids,
7a7a4a59 HM	378	}
7a7a4a59 HM	379	};
99f91934 AS	380
	381	static int __init ehci_platform_init(void)
	382	{
	383	if (usb_disabled())
	384	return -ENODEV;
	385
	386	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	387
	388	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	389	return platform_driver_register(&ehci_platform_driver);
	390	}
	391	module_init(ehci_platform_init);
	392
	393	static void __exit ehci_platform_cleanup(void)
	394	{
	395	platform_driver_unregister(&ehci_platform_driver);
	396	}
	397	module_exit(ehci_platform_cleanup);
	398
	399	MODULE_DESCRIPTION(DRIVER_DESC);
	400	MODULE_AUTHOR("Hauke Mehrtens");
	401	MODULE_AUTHOR("Alan Stern");
	402	MODULE_LICENSE("GPL");