[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 **phys;
	int num_phys;
	bool reset_on_resume;
};

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;

	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, phy_num;

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

	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
		ret = phy_init(priv->phys[phy_num]);
		if (ret)
			goto err_exit_phy;
		ret = phy_power_on(priv->phys[phy_num]);
		if (ret) {
			phy_exit(priv->phys[phy_num]);
			goto err_exit_phy;
		}
	}

	return 0;

err_exit_phy:
	while (--phy_num >= 0) {
		phy_power_off(priv->phys[phy_num]);
		phy_exit(priv->phys[phy_num]);
	}
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, phy_num;

	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
		phy_power_off(priv->phys[phy_num]);
		phy_exit(priv->phys[phy_num]);
	}

	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, phy_num, 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,
		pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
	if (err) {
		dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
		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"))
			priv->reset_on_resume = true;

		if (of_property_read_bool(dev->dev.of_node,
					  "has-transaction-translator"))
			hcd->has_tt = 1;

		priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
				"phys", "#phy-cells");

		if (priv->num_phys > 0) {
			priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
					    sizeof(struct phy *), GFP_KERNEL);
			if (!priv->phys)
				return -ENOMEM;
		} else
			priv->num_phys = 0;

		for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
			priv->phys[phy_num] = devm_of_phy_get_by_index(
					&dev->dev, dev->dev.of_node, phy_num);
			if (IS_ERR(priv->phys[phy_num])) {
				err = PTR_ERR(priv->phys[phy_num]);
					goto err_put_hcd;
			}
		}

		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;
	if (pdata->has_tt)
		hcd->has_tt = 1;
	if (pdata->reset_on_resume)
		priv->reset_on_resume = true;

#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);
	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);

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

	ehci_resume(hcd, priv->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", },
	{ .compatible = "cavium,octeon-6335-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;
7e7a0e67 AR	46	struct phy **phys;
7e7a0e67 AR	47	int num_phys;
b4629a7b	48	bool reset_on_resume;
a4aeb211	49	};
99f91934 AS	50
	51	static const char hcd_name[] = "ehci-platform";
	52
7a7a4a59 HM	53	static int ehci_platform_reset(struct usb_hcd *hcd)
	54	{
	55	struct platform_device *pdev = to_platform_device(hcd->self.controller);
d4f09e28	56	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
7a7a4a59 HM	57	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	58	int retval;
	59
7a7a4a59	60	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
7a7a4a59	61
743fcce0 SS	62	if (pdata->pre_setup) {
	63	retval = pdata->pre_setup(hcd);
	64	if (retval < 0)
	65	return retval;
	66	}
	67
7a7a4a59 HM	68	ehci->caps = hcd->regs + pdata->caps_offset;
	69	retval = ehci_setup(hcd);
	70	if (retval)
	71	return retval;
	72
4534874a FF	73	if (pdata->no_io_watchdog)
4534874a FF	74	ehci->need_io_watchdog = 0;
7a7a4a59 HM	75	return 0;
	76	}
	77
a4aeb211 HG	78	static int ehci_platform_power_on(struct platform_device *dev)
	79	{
	80	struct usb_hcd *hcd = platform_get_drvdata(dev);
	81	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	82	int clk, ret, phy_num;
a4aeb211 HG	83
	84	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	85	ret = clk_prepare_enable(priv->clks[clk]);
	86	if (ret)
	87	goto err_disable_clks;
	88	}
	89
7e7a0e67	90	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	91	ret = phy_init(priv->phys[phy_num]);
	92	if (ret)
	93	goto err_exit_phy;
	94	ret = phy_power_on(priv->phys[phy_num]);
	95	if (ret) {
	96	phy_exit(priv->phys[phy_num]);
	97	goto err_exit_phy;
7e7a0e67	98	}
a4aeb211 HG	99	}
	100
	101	return 0;
	102
	103	err_exit_phy:
7e7a0e67	104	while (--phy_num >= 0) {
216e2992 AR	105	phy_power_off(priv->phys[phy_num]);
216e2992 AR	106	phy_exit(priv->phys[phy_num]);
7e7a0e67	107	}
a4aeb211 HG	108	err_disable_clks:
	109	while (--clk >= 0)
	110	clk_disable_unprepare(priv->clks[clk]);
	111
	112	return ret;
	113	}
	114
	115	static void ehci_platform_power_off(struct platform_device *dev)
	116	{
	117	struct usb_hcd *hcd = platform_get_drvdata(dev);
	118	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	119	int clk, phy_num;
a4aeb211	120
7e7a0e67	121	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	122	phy_power_off(priv->phys[phy_num]);
216e2992 AR	123	phy_exit(priv->phys[phy_num]);
a4aeb211 HG	124	}
	125
	126	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
	127	if (priv->clks[clk])
	128	clk_disable_unprepare(priv->clks[clk]);
	129	}
	130
99f91934	131	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	132
62d08a11	133	static const struct ehci_driver_overrides platform_overrides __initconst = {
a4aeb211 HG	134	.reset = ehci_platform_reset,
a4aeb211 HG	135	.extra_priv_size = sizeof(struct ehci_platform_priv),
7a7a4a59 HM	136	};
7a7a4a59 HM	137
a4aeb211 HG	138	static struct usb_ehci_pdata ehci_platform_defaults = {
	139	.power_on = ehci_platform_power_on,
	140	.power_suspend = ehci_platform_power_off,
	141	.power_off = ehci_platform_power_off,
	142	};
f3bc64d6	143
41ac7b3a	144	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	145	{
	146	struct usb_hcd *hcd;
	147	struct resource *res_mem;
a4aeb211 HG	148	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	149	struct ehci_platform_priv *priv;
ad3db5da	150	struct ehci_hcd *ehci;
7e7a0e67	151	int err, irq, phy_num, clk = 0;
7a7a4a59	152
7a7a4a59 HM	153	if (usb_disabled())
	154	return -ENODEV;
	155
f3bc64d6	156	/*
a4aeb211 HG	157	* Use reasonable defaults so platforms don't have to provide these
a4aeb211 HG	158	* with DT probing on ARM.
f3bc64d6	159	*/
a4aeb211 HG	160	if (!pdata)
a4aeb211 HG	161	pdata = &ehci_platform_defaults;
e1fd7341	162
c99e76c5 AH	163	err = dma_coerce_mask_and_coherent(&dev->dev,
c99e76c5 AH	164	pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
17f69b5f JL	165	if (err) {
17f69b5f JL	166	dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
22d9d8e8	167	return err;
17f69b5f	168	}
f3bc64d6	169
7a7a4a59 HM	170	irq = platform_get_irq(dev, 0);
7a7a4a59 HM	171	if (irq < 0) {
2350cb0c	172	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	173	return irq;
7a7a4a59 HM	174	}
7a7a4a59	175
a4aeb211 HG	176	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
	177	dev_name(&dev->dev));
	178	if (!hcd)
	179	return -ENOMEM;
	180
	181	platform_set_drvdata(dev, hcd);
	182	dev->dev.platform_data = pdata;
	183	priv = hcd_to_ehci_priv(hcd);
ad3db5da	184	ehci = hcd_to_ehci(hcd);
a4aeb211 HG	185
a4aeb211 HG	186	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
ad3db5da HG	187	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	188	ehci->big_endian_mmio = 1;
	189
	190	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	191	ehci->big_endian_desc = 1;
	192
	193	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	194	ehci->big_endian_mmio = ehci->big_endian_desc = 1;
	195
314b41b1 WL	196	if (of_property_read_bool(dev->dev.of_node,
314b41b1 WL	197	"needs-reset-on-resume"))
b4629a7b	198	priv->reset_on_resume = true;
314b41b1	199
40f2f2a3 JE	200	if (of_property_read_bool(dev->dev.of_node,
40f2f2a3 JE	201	"has-transaction-translator"))
b4629a7b	202	hcd->has_tt = 1;
40f2f2a3	203
7e7a0e67 AR	204	priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
7e7a0e67 AR	205	"phys", "#phy-cells");
7e7a0e67	206
216e2992 AR	207	if (priv->num_phys > 0) {
	208	priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
	209	sizeof(struct phy *), GFP_KERNEL);
	210	if (!priv->phys)
	211	return -ENOMEM;
	212	} else
	213	priv->num_phys = 0;
7e7a0e67 AR	214
7e7a0e67 AR	215	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	216	priv->phys[phy_num] = devm_of_phy_get_by_index(
	217	&dev->dev, dev->dev.of_node, phy_num);
	218	if (IS_ERR(priv->phys[phy_num])) {
	219	err = PTR_ERR(priv->phys[phy_num]);
	220	goto err_put_hcd;
	221	}
a4aeb211 HG	222	}
	223
	224	for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
	225	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	226	if (IS_ERR(priv->clks[clk])) {
	227	err = PTR_ERR(priv->clks[clk]);
	228	if (err == -EPROBE_DEFER)
	229	goto err_put_clks;
	230	priv->clks[clk] = NULL;
	231	break;
	232	}
	233	}
	234	}
	235
2d87bbd6 BB	236	priv->rst = devm_reset_control_get_optional(&dev->dev, NULL);
	237	if (IS_ERR(priv->rst)) {
	238	err = PTR_ERR(priv->rst);
	239	if (err == -EPROBE_DEFER)
	240	goto err_put_clks;
	241	priv->rst = NULL;
	242	} else {
	243	err = reset_control_deassert(priv->rst);
	244	if (err)
	245	goto err_put_clks;
	246	}
	247
843d5e03 AS	248	if (pdata->big_endian_desc)
	249	ehci->big_endian_desc = 1;
	250	if (pdata->big_endian_mmio)
	251	ehci->big_endian_mmio = 1;
b4629a7b AB	252	if (pdata->has_tt)
	253	hcd->has_tt = 1;
	254	if (pdata->reset_on_resume)
	255	priv->reset_on_resume = true;
843d5e03 AS	256
	257	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	258	if (ehci->big_endian_mmio) {
	259	dev_err(&dev->dev,
	260	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	261	err = -EINVAL;
2d87bbd6	262	goto err_reset;
843d5e03 AS	263	}
	264	#endif
	265	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	266	if (ehci->big_endian_desc) {
	267	dev_err(&dev->dev,
	268	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	269	err = -EINVAL;
2d87bbd6	270	goto err_reset;
843d5e03 AS	271	}
	272	#endif
	273
04216bed KM	274	if (pdata->power_on) {
	275	err = pdata->power_on(dev);
	276	if (err < 0)
2d87bbd6	277	goto err_reset;
04216bed	278	}
7a7a4a59	279
2062ff48	280	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	281	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	282	if (IS_ERR(hcd->regs)) {
	283	err = PTR_ERR(hcd->regs);
a4aeb211	284	goto err_power;
ec03ad85	285	}
2062ff48 VB	286	hcd->rsrc_start = res_mem->start;
	287	hcd->rsrc_len = resource_size(res_mem);
	288
7a7a4a59 HM	289	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	290	if (err)
a4aeb211	291	goto err_power;
7a7a4a59	292
3c9740a1	293	device_wakeup_enable(hcd->self.controller);
7a7a4a59 HM	294	platform_set_drvdata(dev, hcd);
	295
	296	return err;
	297
04216bed KM	298	err_power:
	299	if (pdata->power_off)
	300	pdata->power_off(dev);
2d87bbd6 BB	301	err_reset:
	302	if (priv->rst)
	303	reset_control_assert(priv->rst);
a4aeb211 HG	304	err_put_clks:
	305	while (--clk >= 0)
	306	clk_put(priv->clks[clk]);
	307	err_put_hcd:
	308	if (pdata == &ehci_platform_defaults)
	309	dev->dev.platform_data = NULL;
	310
	311	usb_put_hcd(hcd);
04216bed	312
7a7a4a59 HM	313	return err;
	314	}
	315
fb4e98ab	316	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	317	{
7a7a4a59 HM	318	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	319	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	320	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
a4aeb211 HG	321	int clk;
7a7a4a59 HM	322
7a7a4a59 HM	323	usb_remove_hcd(hcd);
7a7a4a59	324
04216bed KM	325	if (pdata->power_off)
	326	pdata->power_off(dev);
	327
2d87bbd6 BB	328	if (priv->rst)
	329	reset_control_assert(priv->rst);
	330
a4aeb211 HG	331	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	332	clk_put(priv->clks[clk]);
	333
	334	usb_put_hcd(hcd);
	335
f3bc64d6 AB	336	if (pdata == &ehci_platform_defaults)
	337	dev->dev.platform_data = NULL;
	338
7a7a4a59 HM	339	return 0;
	340	}
	341
5e4ccd9e	342	#ifdef CONFIG_PM_SLEEP
7a7a4a59 HM	343	static int ehci_platform_suspend(struct device *dev)
	344	{
	345	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	346	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	347	struct platform_device *pdev =
04216bed KM	348	container_of(dev, struct platform_device, dev);
c5cf9212	349	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	350	int ret;
	351
	352	ret = ehci_suspend(hcd, do_wakeup);
e155b5b8 VG	353	if (ret)
e155b5b8 VG	354	return ret;
7a7a4a59	355
04216bed KM	356	if (pdata->power_suspend)
	357	pdata->power_suspend(pdev);
	358
	359	return ret;
7a7a4a59 HM	360	}
	361
	362	static int ehci_platform_resume(struct device *dev)
	363	{
	364	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	365	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
04216bed KM	366	struct platform_device *pdev =
04216bed KM	367	container_of(dev, struct platform_device, dev);
b4629a7b	368	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
04216bed KM	369
	370	if (pdata->power_on) {
	371	int err = pdata->power_on(pdev);
	372	if (err < 0)
	373	return err;
	374	}
7a7a4a59	375
b4629a7b	376	ehci_resume(hcd, priv->reset_on_resume);
7a7a4a59 HM	377	return 0;
7a7a4a59 HM	378	}
5e4ccd9e	379	#endif /* CONFIG_PM_SLEEP */
7a7a4a59	380
f3bc64d6 AB	381	static const struct of_device_id vt8500_ehci_ids[] = {
	382	{ .compatible = "via,vt8500-ehci", },
	383	{ .compatible = "wm,prizm-ehci", },
915974c3	384	{ .compatible = "generic-ehci", },
a95cfa6b	385	{ .compatible = "cavium,octeon-6335-ehci", },
f3bc64d6 AB	386	{}
f3bc64d6 AB	387	};
a4aeb211	388	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	389
7a7a4a59 HM	390	static const struct platform_device_id ehci_platform_table[] = {
	391	{ "ehci-platform", 0 },
	392	{ }
	393	};
	394	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	395
5e4ccd9e WK	396	static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
5e4ccd9e WK	397	ehci_platform_resume);
7a7a4a59 HM	398
	399	static struct platform_driver ehci_platform_driver = {
	400	.id_table = ehci_platform_table,
	401	.probe = ehci_platform_probe,
7690417d	402	.remove = ehci_platform_remove,
7a7a4a59 HM	403	.shutdown = usb_hcd_platform_shutdown,
7a7a4a59 HM	404	.driver = {
7a7a4a59 HM	405	.name = "ehci-platform",
7a7a4a59 HM	406	.pm = &ehci_platform_pm_ops,
ae5e5f7b	407	.of_match_table = vt8500_ehci_ids,
7a7a4a59 HM	408	}
7a7a4a59 HM	409	};
99f91934 AS	410
	411	static int __init ehci_platform_init(void)
	412	{
	413	if (usb_disabled())
	414	return -ENODEV;
	415
	416	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	417
	418	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	419	return platform_driver_register(&ehci_platform_driver);
	420	}
	421	module_init(ehci_platform_init);
	422
	423	static void __exit ehci_platform_cleanup(void)
	424	{
	425	platform_driver_unregister(&ehci_platform_driver);
	426	}
	427	module_exit(ehci_platform_cleanup);
	428
	429	MODULE_DESCRIPTION(DRIVER_DESC);
	430	MODULE_AUTHOR("Hauke Mehrtens");
	431	MODULE_AUTHOR("Alan Stern");
	432	MODULE_LICENSE("GPL");