[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/acpi.h>
#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 <linux/usb/of.h>

#include "ehci.h"

#define DRIVER_DESC "EHCI generic platform driver"
#define EHCI_MAX_CLKS 4
#define EHCI_MAX_RSTS 4
#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 *rsts[EHCI_MAX_RSTS];
	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, rst;

	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;
			} else if (!hcd->phy) {
				/* Avoiding phy_get() in usb_add_hcd() */
				hcd->phy = priv->phys[phy_num];
			}
		}

		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;
			}
		}
	}

	for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
		priv->rsts[rst] = devm_reset_control_get_shared_by_index(
					&dev->dev, rst);
		if (IS_ERR(priv->rsts[rst])) {
			err = PTR_ERR(priv->rsts[rst]);
			if (err == -EPROBE_DEFER)
				goto err_reset;
			priv->rsts[rst] = NULL;
			break;
		}

		err = reset_control_deassert(priv->rsts[rst]);
		if (err)
			goto err_reset;
	}

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

	return err;

err_power:
	if (pdata->power_off)
		pdata->power_off(dev);
err_reset:
	while (--rst >= 0)
		reset_control_assert(priv->rsts[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, rst;

	usb_remove_hcd(hcd);

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

	for (rst = 0; rst < EHCI_MAX_RSTS && priv->rsts[rst]; rst++)
		reset_control_assert(priv->rsts[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 = to_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 = to_platform_device(dev);
	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
	struct device *companion_dev;

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

	companion_dev = usb_of_get_companion_dev(hcd->self.controller);
	if (companion_dev)
		device_pm_wait_for_dev(hcd->self.controller, companion_dev);

	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 acpi_device_id ehci_acpi_match[] = {
	{ "PNP0D20", 0 }, /* EHCI controller without debug */
	{ }
};
MODULE_DEVICE_TABLE(acpi, ehci_acpi_match);

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,
		.acpi_match_table = ACPI_PTR(ehci_acpi_match),
	}
};

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	*/
776c15d0	22	#include <linux/acpi.h>
a4aeb211	23	#include <linux/clk.h>
f3bc64d6	24	#include <linux/dma-mapping.h>
148e1134	25	#include <linux/err.h>
99f91934	26	#include <linux/kernel.h>
d1bb67a7 AS	27	#include <linux/hrtimer.h>
d1bb67a7 AS	28	#include <linux/io.h>
99f91934	29	#include <linux/module.h>
f3bc64d6	30	#include <linux/of.h>
a4aeb211	31	#include <linux/phy/phy.h>
7a7a4a59	32	#include <linux/platform_device.h>
2d87bbd6	33	#include <linux/reset.h>
99f91934 AS	34	#include <linux/usb.h>
99f91934 AS	35	#include <linux/usb/hcd.h>
7a7a4a59	36	#include <linux/usb/ehci_pdriver.h>
d4d75128	37	#include <linux/usb/of.h>
7a7a4a59	38
99f91934 AS	39	#include "ehci.h"
	40
	41	#define DRIVER_DESC "EHCI generic platform driver"
73577d61	42	#define EHCI_MAX_CLKS 4
1e4b4348	43	#define EHCI_MAX_RSTS 4
a4aeb211 HG	44	#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
	45
	46	struct ehci_platform_priv {
	47	struct clk *clks[EHCI_MAX_CLKS];
d0e08b00	48	struct reset_control *rsts[EHCI_MAX_RSTS];
7e7a0e67 AR	49	struct phy **phys;
7e7a0e67 AR	50	int num_phys;
b4629a7b	51	bool reset_on_resume;
a4aeb211	52	};
99f91934 AS	53
	54	static const char hcd_name[] = "ehci-platform";
	55
7a7a4a59 HM	56	static int ehci_platform_reset(struct usb_hcd *hcd)
	57	{
	58	struct platform_device *pdev = to_platform_device(hcd->self.controller);
d4f09e28	59	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
7a7a4a59 HM	60	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	61	int retval;
	62
7a7a4a59	63	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
7a7a4a59	64
743fcce0 SS	65	if (pdata->pre_setup) {
	66	retval = pdata->pre_setup(hcd);
	67	if (retval < 0)
	68	return retval;
	69	}
	70
7a7a4a59 HM	71	ehci->caps = hcd->regs + pdata->caps_offset;
	72	retval = ehci_setup(hcd);
	73	if (retval)
	74	return retval;
	75
4534874a FF	76	if (pdata->no_io_watchdog)
4534874a FF	77	ehci->need_io_watchdog = 0;
7a7a4a59 HM	78	return 0;
	79	}
	80
a4aeb211 HG	81	static int ehci_platform_power_on(struct platform_device *dev)
	82	{
	83	struct usb_hcd *hcd = platform_get_drvdata(dev);
	84	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	85	int clk, ret, phy_num;
a4aeb211 HG	86
	87	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	88	ret = clk_prepare_enable(priv->clks[clk]);
	89	if (ret)
	90	goto err_disable_clks;
	91	}
	92
7e7a0e67	93	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	94	ret = phy_init(priv->phys[phy_num]);
	95	if (ret)
	96	goto err_exit_phy;
	97	ret = phy_power_on(priv->phys[phy_num]);
	98	if (ret) {
	99	phy_exit(priv->phys[phy_num]);
	100	goto err_exit_phy;
7e7a0e67	101	}
a4aeb211 HG	102	}
	103
	104	return 0;
	105
	106	err_exit_phy:
7e7a0e67	107	while (--phy_num >= 0) {
216e2992 AR	108	phy_power_off(priv->phys[phy_num]);
216e2992 AR	109	phy_exit(priv->phys[phy_num]);
7e7a0e67	110	}
a4aeb211 HG	111	err_disable_clks:
	112	while (--clk >= 0)
	113	clk_disable_unprepare(priv->clks[clk]);
	114
	115	return ret;
	116	}
	117
	118	static void ehci_platform_power_off(struct platform_device *dev)
	119	{
	120	struct usb_hcd *hcd = platform_get_drvdata(dev);
	121	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	122	int clk, phy_num;
a4aeb211	123
7e7a0e67	124	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	125	phy_power_off(priv->phys[phy_num]);
216e2992 AR	126	phy_exit(priv->phys[phy_num]);
a4aeb211 HG	127	}
	128
	129	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
	130	if (priv->clks[clk])
	131	clk_disable_unprepare(priv->clks[clk]);
	132	}
	133
99f91934	134	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	135
62d08a11	136	static const struct ehci_driver_overrides platform_overrides __initconst = {
a4aeb211 HG	137	.reset = ehci_platform_reset,
a4aeb211 HG	138	.extra_priv_size = sizeof(struct ehci_platform_priv),
7a7a4a59 HM	139	};
7a7a4a59 HM	140
a4aeb211 HG	141	static struct usb_ehci_pdata ehci_platform_defaults = {
	142	.power_on = ehci_platform_power_on,
	143	.power_suspend = ehci_platform_power_off,
	144	.power_off = ehci_platform_power_off,
	145	};
f3bc64d6	146
41ac7b3a	147	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	148	{
	149	struct usb_hcd *hcd;
	150	struct resource *res_mem;
a4aeb211 HG	151	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	152	struct ehci_platform_priv *priv;
ad3db5da	153	struct ehci_hcd *ehci;
d0e08b00	154	int err, irq, phy_num, clk = 0, rst;
7a7a4a59	155
7a7a4a59 HM	156	if (usb_disabled())
	157	return -ENODEV;
	158
f3bc64d6	159	/*
a4aeb211 HG	160	* Use reasonable defaults so platforms don't have to provide these
a4aeb211 HG	161	* with DT probing on ARM.
f3bc64d6	162	*/
a4aeb211 HG	163	if (!pdata)
a4aeb211 HG	164	pdata = &ehci_platform_defaults;
e1fd7341	165
c99e76c5 AH	166	err = dma_coerce_mask_and_coherent(&dev->dev,
c99e76c5 AH	167	pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
17f69b5f JL	168	if (err) {
17f69b5f JL	169	dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
22d9d8e8	170	return err;
17f69b5f	171	}
f3bc64d6	172
7a7a4a59 HM	173	irq = platform_get_irq(dev, 0);
7a7a4a59 HM	174	if (irq < 0) {
2350cb0c	175	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	176	return irq;
7a7a4a59 HM	177	}
7a7a4a59	178
a4aeb211 HG	179	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
	180	dev_name(&dev->dev));
	181	if (!hcd)
	182	return -ENOMEM;
	183
	184	platform_set_drvdata(dev, hcd);
	185	dev->dev.platform_data = pdata;
	186	priv = hcd_to_ehci_priv(hcd);
ad3db5da	187	ehci = hcd_to_ehci(hcd);
a4aeb211 HG	188
a4aeb211 HG	189	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
ad3db5da HG	190	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	191	ehci->big_endian_mmio = 1;
	192
	193	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	194	ehci->big_endian_desc = 1;
	195
	196	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	197	ehci->big_endian_mmio = ehci->big_endian_desc = 1;
	198
314b41b1 WL	199	if (of_property_read_bool(dev->dev.of_node,
314b41b1 WL	200	"needs-reset-on-resume"))
b4629a7b	201	priv->reset_on_resume = true;
314b41b1	202
40f2f2a3 JE	203	if (of_property_read_bool(dev->dev.of_node,
40f2f2a3 JE	204	"has-transaction-translator"))
b4629a7b	205	hcd->has_tt = 1;
40f2f2a3	206
7e7a0e67 AR	207	priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
7e7a0e67 AR	208	"phys", "#phy-cells");
7e7a0e67	209
216e2992 AR	210	if (priv->num_phys > 0) {
	211	priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
	212	sizeof(struct phy *), GFP_KERNEL);
	213	if (!priv->phys)
	214	return -ENOMEM;
	215	} else
	216	priv->num_phys = 0;
7e7a0e67 AR	217
7e7a0e67 AR	218	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	219	priv->phys[phy_num] = devm_of_phy_get_by_index(
	220	&dev->dev, dev->dev.of_node, phy_num);
	221	if (IS_ERR(priv->phys[phy_num])) {
	222	err = PTR_ERR(priv->phys[phy_num]);
	223	goto err_put_hcd;
42a58c99 YS	224	} else if (!hcd->phy) {
	225	/* Avoiding phy_get() in usb_add_hcd() */
	226	hcd->phy = priv->phys[phy_num];
216e2992	227	}
a4aeb211 HG	228	}
	229
	230	for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
	231	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	232	if (IS_ERR(priv->clks[clk])) {
	233	err = PTR_ERR(priv->clks[clk]);
	234	if (err == -EPROBE_DEFER)
	235	goto err_put_clks;
	236	priv->clks[clk] = NULL;
	237	break;
	238	}
	239	}
	240	}
	241
d0e08b00	242	for (rst = 0; rst < EHCI_MAX_RSTS; rst++) {
76d15c8f HG	243	priv->rsts[rst] = devm_reset_control_get_shared_by_index(
76d15c8f HG	244	&dev->dev, rst);
d0e08b00 JX	245	if (IS_ERR(priv->rsts[rst])) {
	246	err = PTR_ERR(priv->rsts[rst]);
	247	if (err == -EPROBE_DEFER)
	248	goto err_reset;
	249	priv->rsts[rst] = NULL;
	250	break;
	251	}
	252
	253	err = reset_control_deassert(priv->rsts[rst]);
76d15c8f	254	if (err)
d0e08b00	255	goto err_reset;
2d87bbd6 BB	256	}
2d87bbd6 BB	257
843d5e03 AS	258	if (pdata->big_endian_desc)
	259	ehci->big_endian_desc = 1;
	260	if (pdata->big_endian_mmio)
	261	ehci->big_endian_mmio = 1;
b4629a7b AB	262	if (pdata->has_tt)
	263	hcd->has_tt = 1;
	264	if (pdata->reset_on_resume)
	265	priv->reset_on_resume = true;
843d5e03 AS	266
	267	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	268	if (ehci->big_endian_mmio) {
	269	dev_err(&dev->dev,
	270	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	271	err = -EINVAL;
2d87bbd6	272	goto err_reset;
843d5e03 AS	273	}
	274	#endif
	275	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	276	if (ehci->big_endian_desc) {
	277	dev_err(&dev->dev,
	278	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	279	err = -EINVAL;
2d87bbd6	280	goto err_reset;
843d5e03 AS	281	}
	282	#endif
	283
04216bed KM	284	if (pdata->power_on) {
	285	err = pdata->power_on(dev);
	286	if (err < 0)
2d87bbd6	287	goto err_reset;
04216bed	288	}
7a7a4a59	289
2062ff48	290	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	291	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	292	if (IS_ERR(hcd->regs)) {
	293	err = PTR_ERR(hcd->regs);
a4aeb211	294	goto err_power;
ec03ad85	295	}
2062ff48 VB	296	hcd->rsrc_start = res_mem->start;
	297	hcd->rsrc_len = resource_size(res_mem);
	298
7a7a4a59 HM	299	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	300	if (err)
a4aeb211	301	goto err_power;
7a7a4a59	302
3c9740a1	303	device_wakeup_enable(hcd->self.controller);
d4d75128	304	device_enable_async_suspend(hcd->self.controller);
7a7a4a59 HM	305	platform_set_drvdata(dev, hcd);
	306
	307	return err;
	308
04216bed KM	309	err_power:
	310	if (pdata->power_off)
	311	pdata->power_off(dev);
2d87bbd6	312	err_reset:
76d15c8f	313	while (--rst >= 0)
d0e08b00	314	reset_control_assert(priv->rsts[rst]);
a4aeb211 HG	315	err_put_clks:
	316	while (--clk >= 0)
	317	clk_put(priv->clks[clk]);
	318	err_put_hcd:
	319	if (pdata == &ehci_platform_defaults)
	320	dev->dev.platform_data = NULL;
	321
	322	usb_put_hcd(hcd);
04216bed	323
7a7a4a59 HM	324	return err;
	325	}
	326
fb4e98ab	327	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	328	{
7a7a4a59 HM	329	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	330	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211	331	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
d0e08b00	332	int clk, rst;
7a7a4a59 HM	333
7a7a4a59 HM	334	usb_remove_hcd(hcd);
7a7a4a59	335
04216bed KM	336	if (pdata->power_off)
	337	pdata->power_off(dev);
	338
76d15c8f	339	for (rst = 0; rst < EHCI_MAX_RSTS && priv->rsts[rst]; rst++)
d0e08b00	340	reset_control_assert(priv->rsts[rst]);
2d87bbd6	341
a4aeb211 HG	342	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	343	clk_put(priv->clks[clk]);
	344
	345	usb_put_hcd(hcd);
	346
f3bc64d6 AB	347	if (pdata == &ehci_platform_defaults)
	348	dev->dev.platform_data = NULL;
	349
7a7a4a59 HM	350	return 0;
	351	}
	352
5e4ccd9e	353	#ifdef CONFIG_PM_SLEEP
7a7a4a59 HM	354	static int ehci_platform_suspend(struct device *dev)
	355	{
	356	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	357	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
20db5513	358	struct platform_device *pdev = to_platform_device(dev);
c5cf9212	359	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	360	int ret;
	361
	362	ret = ehci_suspend(hcd, do_wakeup);
e155b5b8 VG	363	if (ret)
e155b5b8 VG	364	return ret;
7a7a4a59	365
04216bed KM	366	if (pdata->power_suspend)
	367	pdata->power_suspend(pdev);
	368
	369	return ret;
7a7a4a59 HM	370	}
	371
	372	static int ehci_platform_resume(struct device *dev)
	373	{
	374	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	375	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
20db5513	376	struct platform_device *pdev = to_platform_device(dev);
b4629a7b	377	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
d4d75128	378	struct device *companion_dev;
04216bed KM	379
	380	if (pdata->power_on) {
	381	int err = pdata->power_on(pdev);
	382	if (err < 0)
	383	return err;
	384	}
7a7a4a59	385
d4d75128 YS	386	companion_dev = usb_of_get_companion_dev(hcd->self.controller);
	387	if (companion_dev)
	388	device_pm_wait_for_dev(hcd->self.controller, companion_dev);
	389
b4629a7b	390	ehci_resume(hcd, priv->reset_on_resume);
7a7a4a59 HM	391	return 0;
7a7a4a59 HM	392	}
5e4ccd9e	393	#endif /* CONFIG_PM_SLEEP */
7a7a4a59	394
f3bc64d6 AB	395	static const struct of_device_id vt8500_ehci_ids[] = {
	396	{ .compatible = "via,vt8500-ehci", },
	397	{ .compatible = "wm,prizm-ehci", },
915974c3	398	{ .compatible = "generic-ehci", },
a95cfa6b	399	{ .compatible = "cavium,octeon-6335-ehci", },
f3bc64d6 AB	400	{}
f3bc64d6 AB	401	};
a4aeb211	402	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	403
776c15d0 JL	404	static const struct acpi_device_id ehci_acpi_match[] = {
	405	{ "PNP0D20", 0 }, /* EHCI controller without debug */
	406	{ }
	407	};
	408	MODULE_DEVICE_TABLE(acpi, ehci_acpi_match);
	409
7a7a4a59 HM	410	static const struct platform_device_id ehci_platform_table[] = {
	411	{ "ehci-platform", 0 },
	412	{ }
	413	};
	414	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	415
5e4ccd9e WK	416	static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
5e4ccd9e WK	417	ehci_platform_resume);
7a7a4a59 HM	418
	419	static struct platform_driver ehci_platform_driver = {
	420	.id_table = ehci_platform_table,
	421	.probe = ehci_platform_probe,
7690417d	422	.remove = ehci_platform_remove,
7a7a4a59 HM	423	.shutdown = usb_hcd_platform_shutdown,
7a7a4a59 HM	424	.driver = {
7a7a4a59 HM	425	.name = "ehci-platform",
7a7a4a59 HM	426	.pm = &ehci_platform_pm_ops,
ae5e5f7b	427	.of_match_table = vt8500_ehci_ids,
776c15d0	428	.acpi_match_table = ACPI_PTR(ehci_acpi_match),
7a7a4a59 HM	429	}
7a7a4a59 HM	430	};
99f91934 AS	431
	432	static int __init ehci_platform_init(void)
	433	{
	434	if (usb_disabled())
	435	return -ENODEV;
	436
	437	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	438
	439	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	440	return platform_driver_register(&ehci_platform_driver);
	441	}
	442	module_init(ehci_platform_init);
	443
	444	static void __exit ehci_platform_cleanup(void)
	445	{
	446	platform_driver_unregister(&ehci_platform_driver);
	447	}
	448	module_exit(ehci_platform_cleanup);
	449
	450	MODULE_DESCRIPTION(DRIVER_DESC);
	451	MODULE_AUTHOR("Hauke Mehrtens");
	452	MODULE_AUTHOR("Alan Stern");
	453	MODULE_LICENSE("GPL");