[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/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 "ehci.h"

#define DRIVER_DESC "EHCI generic platform driver"
#define EHCI_MAX_CLKS 4
#define EHCI_MAX_RSTS 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 *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;
			}
		}

		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);
	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);

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