[mirror_ubuntu-bionic-kernel.git] / drivers / usb / host / ehci-platform.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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
 */
#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 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;
	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;
			} 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;
			}
		}
	}

	priv->rsts = devm_reset_control_array_get_optional_shared(&dev->dev);
	if (IS_ERR(priv->rsts)) {
		err = PTR_ERR(priv->rsts);
		goto err_put_clks;
	}

	err = reset_control_deassert(priv->rsts);
	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);
	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:
	reset_control_assert(priv->rsts);
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);

	reset_control_assert(priv->rsts);

	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);
		put_device(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
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
7a7a4a59 HM	2	/*
	3	* Generic platform ehci driver
	4	*
	5	* Copyright 2007 Steven Brown <sbrown@cortland.com>
	6	* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
a4aeb211	7	* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
7a7a4a59 HM	8	*
	9	* Derived from the ohci-ssb driver
	10	* Copyright 2007 Michael Buesch <m@bues.ch>
	11	*
	12	* Derived from the EHCI-PCI driver
	13	* Copyright (c) 2000-2004 by David Brownell
	14	*
	15	* Derived from the ohci-pci driver
	16	* Copyright 1999 Roman Weissgaerber
	17	* Copyright 2000-2002 David Brownell
	18	* Copyright 1999 Linus Torvalds
	19	* Copyright 1999 Gregory P. Smith
7a7a4a59	20	*/
776c15d0	21	#include <linux/acpi.h>
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	35	#include <linux/usb/ehci_pdriver.h>
d4d75128	36	#include <linux/usb/of.h>
7a7a4a59	37
99f91934 AS	38	#include "ehci.h"
	39
	40	#define DRIVER_DESC "EHCI generic platform driver"
73577d61	41	#define EHCI_MAX_CLKS 4
a4aeb211 HG	42	#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
	43
	44	struct ehci_platform_priv {
	45	struct clk *clks[EHCI_MAX_CLKS];
8e84f8aa	46	struct reset_control *rsts;
7e7a0e67 AR	47	struct phy **phys;
7e7a0e67 AR	48	int num_phys;
b4629a7b	49	bool reset_on_resume;
a4aeb211	50	};
99f91934 AS	51
	52	static const char hcd_name[] = "ehci-platform";
	53
7a7a4a59 HM	54	static int ehci_platform_reset(struct usb_hcd *hcd)
	55	{
	56	struct platform_device *pdev = to_platform_device(hcd->self.controller);
d4f09e28	57	struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev);
7a7a4a59 HM	58	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
	59	int retval;
	60
7a7a4a59	61	ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
7a7a4a59	62
743fcce0 SS	63	if (pdata->pre_setup) {
	64	retval = pdata->pre_setup(hcd);
	65	if (retval < 0)
	66	return retval;
	67	}
	68
7a7a4a59 HM	69	ehci->caps = hcd->regs + pdata->caps_offset;
	70	retval = ehci_setup(hcd);
	71	if (retval)
	72	return retval;
	73
4534874a FF	74	if (pdata->no_io_watchdog)
4534874a FF	75	ehci->need_io_watchdog = 0;
7a7a4a59 HM	76	return 0;
	77	}
	78
a4aeb211 HG	79	static int ehci_platform_power_on(struct platform_device *dev)
	80	{
	81	struct usb_hcd *hcd = platform_get_drvdata(dev);
	82	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	83	int clk, ret, phy_num;
a4aeb211 HG	84
	85	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++) {
	86	ret = clk_prepare_enable(priv->clks[clk]);
	87	if (ret)
	88	goto err_disable_clks;
	89	}
	90
7e7a0e67	91	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	92	ret = phy_init(priv->phys[phy_num]);
	93	if (ret)
	94	goto err_exit_phy;
	95	ret = phy_power_on(priv->phys[phy_num]);
	96	if (ret) {
	97	phy_exit(priv->phys[phy_num]);
	98	goto err_exit_phy;
7e7a0e67	99	}
a4aeb211 HG	100	}
	101
	102	return 0;
	103
	104	err_exit_phy:
7e7a0e67	105	while (--phy_num >= 0) {
216e2992 AR	106	phy_power_off(priv->phys[phy_num]);
216e2992 AR	107	phy_exit(priv->phys[phy_num]);
7e7a0e67	108	}
a4aeb211 HG	109	err_disable_clks:
	110	while (--clk >= 0)
	111	clk_disable_unprepare(priv->clks[clk]);
	112
	113	return ret;
	114	}
	115
	116	static void ehci_platform_power_off(struct platform_device *dev)
	117	{
	118	struct usb_hcd *hcd = platform_get_drvdata(dev);
	119	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
7e7a0e67	120	int clk, phy_num;
a4aeb211	121
7e7a0e67	122	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	123	phy_power_off(priv->phys[phy_num]);
216e2992 AR	124	phy_exit(priv->phys[phy_num]);
a4aeb211 HG	125	}
	126
	127	for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
	128	if (priv->clks[clk])
	129	clk_disable_unprepare(priv->clks[clk]);
	130	}
	131
99f91934	132	static struct hc_driver __read_mostly ehci_platform_hc_driver;
7a7a4a59	133
62d08a11	134	static const struct ehci_driver_overrides platform_overrides __initconst = {
a4aeb211 HG	135	.reset = ehci_platform_reset,
a4aeb211 HG	136	.extra_priv_size = sizeof(struct ehci_platform_priv),
7a7a4a59 HM	137	};
7a7a4a59 HM	138
a4aeb211 HG	139	static struct usb_ehci_pdata ehci_platform_defaults = {
	140	.power_on = ehci_platform_power_on,
	141	.power_suspend = ehci_platform_power_off,
	142	.power_off = ehci_platform_power_off,
	143	};
f3bc64d6	144
41ac7b3a	145	static int ehci_platform_probe(struct platform_device *dev)
7a7a4a59 HM	146	{
	147	struct usb_hcd *hcd;
	148	struct resource *res_mem;
a4aeb211 HG	149	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211 HG	150	struct ehci_platform_priv *priv;
ad3db5da	151	struct ehci_hcd *ehci;
8e84f8aa	152	int err, irq, phy_num, clk = 0;
7a7a4a59	153
7a7a4a59 HM	154	if (usb_disabled())
	155	return -ENODEV;
	156
f3bc64d6	157	/*
a4aeb211 HG	158	* Use reasonable defaults so platforms don't have to provide these
a4aeb211 HG	159	* with DT probing on ARM.
f3bc64d6	160	*/
a4aeb211 HG	161	if (!pdata)
a4aeb211 HG	162	pdata = &ehci_platform_defaults;
e1fd7341	163
c99e76c5 AH	164	err = dma_coerce_mask_and_coherent(&dev->dev,
c99e76c5 AH	165	pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32));
17f69b5f JL	166	if (err) {
17f69b5f JL	167	dev_err(&dev->dev, "Error: DMA mask configuration failed\n");
22d9d8e8	168	return err;
17f69b5f	169	}
f3bc64d6	170
7a7a4a59 HM	171	irq = platform_get_irq(dev, 0);
7a7a4a59 HM	172	if (irq < 0) {
2350cb0c	173	dev_err(&dev->dev, "no irq provided");
7a7a4a59 HM	174	return irq;
7a7a4a59 HM	175	}
7a7a4a59	176
a4aeb211 HG	177	hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
	178	dev_name(&dev->dev));
	179	if (!hcd)
	180	return -ENOMEM;
	181
	182	platform_set_drvdata(dev, hcd);
	183	dev->dev.platform_data = pdata;
	184	priv = hcd_to_ehci_priv(hcd);
ad3db5da	185	ehci = hcd_to_ehci(hcd);
a4aeb211 HG	186
a4aeb211 HG	187	if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
ad3db5da HG	188	if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
	189	ehci->big_endian_mmio = 1;
	190
	191	if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
	192	ehci->big_endian_desc = 1;
	193
	194	if (of_property_read_bool(dev->dev.of_node, "big-endian"))
	195	ehci->big_endian_mmio = ehci->big_endian_desc = 1;
	196
314b41b1 WL	197	if (of_property_read_bool(dev->dev.of_node,
314b41b1 WL	198	"needs-reset-on-resume"))
b4629a7b	199	priv->reset_on_resume = true;
314b41b1	200
40f2f2a3 JE	201	if (of_property_read_bool(dev->dev.of_node,
40f2f2a3 JE	202	"has-transaction-translator"))
b4629a7b	203	hcd->has_tt = 1;
40f2f2a3	204
7e7a0e67 AR	205	priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
7e7a0e67 AR	206	"phys", "#phy-cells");
7e7a0e67	207
216e2992 AR	208	if (priv->num_phys > 0) {
	209	priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
	210	sizeof(struct phy *), GFP_KERNEL);
	211	if (!priv->phys)
	212	return -ENOMEM;
	213	} else
	214	priv->num_phys = 0;
7e7a0e67 AR	215
7e7a0e67 AR	216	for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
216e2992 AR	217	priv->phys[phy_num] = devm_of_phy_get_by_index(
	218	&dev->dev, dev->dev.of_node, phy_num);
	219	if (IS_ERR(priv->phys[phy_num])) {
	220	err = PTR_ERR(priv->phys[phy_num]);
	221	goto err_put_hcd;
42a58c99 YS	222	} else if (!hcd->phy) {
	223	/* Avoiding phy_get() in usb_add_hcd() */
	224	hcd->phy = priv->phys[phy_num];
216e2992	225	}
a4aeb211 HG	226	}
	227
	228	for (clk = 0; clk < EHCI_MAX_CLKS; clk++) {
	229	priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
	230	if (IS_ERR(priv->clks[clk])) {
	231	err = PTR_ERR(priv->clks[clk]);
	232	if (err == -EPROBE_DEFER)
	233	goto err_put_clks;
	234	priv->clks[clk] = NULL;
	235	break;
	236	}
	237	}
	238	}
	239
8e84f8aa MY	240	priv->rsts = devm_reset_control_array_get_optional_shared(&dev->dev);
	241	if (IS_ERR(priv->rsts)) {
	242	err = PTR_ERR(priv->rsts);
	243	goto err_put_clks;
2d87bbd6 BB	244	}
2d87bbd6 BB	245
8e84f8aa MY	246	err = reset_control_deassert(priv->rsts);
	247	if (err)
	248	goto err_put_clks;
	249
843d5e03 AS	250	if (pdata->big_endian_desc)
	251	ehci->big_endian_desc = 1;
	252	if (pdata->big_endian_mmio)
	253	ehci->big_endian_mmio = 1;
b4629a7b AB	254	if (pdata->has_tt)
	255	hcd->has_tt = 1;
	256	if (pdata->reset_on_resume)
	257	priv->reset_on_resume = true;
843d5e03 AS	258
	259	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	260	if (ehci->big_endian_mmio) {
	261	dev_err(&dev->dev,
	262	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	263	err = -EINVAL;
2d87bbd6	264	goto err_reset;
843d5e03 AS	265	}
	266	#endif
	267	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	268	if (ehci->big_endian_desc) {
	269	dev_err(&dev->dev,
	270	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	271	err = -EINVAL;
2d87bbd6	272	goto err_reset;
843d5e03 AS	273	}
	274	#endif
	275
04216bed KM	276	if (pdata->power_on) {
	277	err = pdata->power_on(dev);
	278	if (err < 0)
2d87bbd6	279	goto err_reset;
04216bed	280	}
7a7a4a59	281
2062ff48	282	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	283	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	284	if (IS_ERR(hcd->regs)) {
	285	err = PTR_ERR(hcd->regs);
a4aeb211	286	goto err_power;
ec03ad85	287	}
2062ff48 VB	288	hcd->rsrc_start = res_mem->start;
	289	hcd->rsrc_len = resource_size(res_mem);
	290
7a7a4a59 HM	291	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	292	if (err)
a4aeb211	293	goto err_power;
7a7a4a59	294
3c9740a1	295	device_wakeup_enable(hcd->self.controller);
d4d75128	296	device_enable_async_suspend(hcd->self.controller);
7a7a4a59 HM	297	platform_set_drvdata(dev, hcd);
	298
	299	return err;
	300
04216bed KM	301	err_power:
	302	if (pdata->power_off)
	303	pdata->power_off(dev);
2d87bbd6	304	err_reset:
8e84f8aa	305	reset_control_assert(priv->rsts);
a4aeb211 HG	306	err_put_clks:
	307	while (--clk >= 0)
	308	clk_put(priv->clks[clk]);
	309	err_put_hcd:
	310	if (pdata == &ehci_platform_defaults)
	311	dev->dev.platform_data = NULL;
	312
	313	usb_put_hcd(hcd);
04216bed	314
7a7a4a59 HM	315	return err;
	316	}
	317
fb4e98ab	318	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	319	{
7a7a4a59 HM	320	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	321	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211	322	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
8e84f8aa	323	int clk;
7a7a4a59 HM	324
7a7a4a59 HM	325	usb_remove_hcd(hcd);
7a7a4a59	326
04216bed KM	327	if (pdata->power_off)
	328	pdata->power_off(dev);
	329
8e84f8aa	330	reset_control_assert(priv->rsts);
2d87bbd6	331
a4aeb211 HG	332	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	333	clk_put(priv->clks[clk]);
	334
	335	usb_put_hcd(hcd);
	336
f3bc64d6 AB	337	if (pdata == &ehci_platform_defaults)
	338	dev->dev.platform_data = NULL;
	339
7a7a4a59 HM	340	return 0;
	341	}
	342
5e4ccd9e	343	#ifdef CONFIG_PM_SLEEP
7a7a4a59 HM	344	static int ehci_platform_suspend(struct device *dev)
	345	{
	346	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	347	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
20db5513	348	struct platform_device *pdev = to_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);
20db5513	366	struct platform_device *pdev = to_platform_device(dev);
b4629a7b	367	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
d4d75128	368	struct device *companion_dev;
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
d4d75128	376	companion_dev = usb_of_get_companion_dev(hcd->self.controller);
a7415477	377	if (companion_dev) {
d4d75128	378	device_pm_wait_for_dev(hcd->self.controller, companion_dev);
a7415477 JH	379	put_device(companion_dev);
a7415477 JH	380	}
d4d75128	381
b4629a7b	382	ehci_resume(hcd, priv->reset_on_resume);
7a7a4a59 HM	383	return 0;
7a7a4a59 HM	384	}
5e4ccd9e	385	#endif /* CONFIG_PM_SLEEP */
7a7a4a59	386
f3bc64d6 AB	387	static const struct of_device_id vt8500_ehci_ids[] = {
	388	{ .compatible = "via,vt8500-ehci", },
	389	{ .compatible = "wm,prizm-ehci", },
915974c3	390	{ .compatible = "generic-ehci", },
a95cfa6b	391	{ .compatible = "cavium,octeon-6335-ehci", },
f3bc64d6 AB	392	{}
f3bc64d6 AB	393	};
a4aeb211	394	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	395
776c15d0 JL	396	static const struct acpi_device_id ehci_acpi_match[] = {
	397	{ "PNP0D20", 0 }, /* EHCI controller without debug */
	398	{ }
	399	};
	400	MODULE_DEVICE_TABLE(acpi, ehci_acpi_match);
	401
7a7a4a59 HM	402	static const struct platform_device_id ehci_platform_table[] = {
	403	{ "ehci-platform", 0 },
	404	{ }
	405	};
	406	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	407
5e4ccd9e WK	408	static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
5e4ccd9e WK	409	ehci_platform_resume);
7a7a4a59 HM	410
	411	static struct platform_driver ehci_platform_driver = {
	412	.id_table = ehci_platform_table,
	413	.probe = ehci_platform_probe,
7690417d	414	.remove = ehci_platform_remove,
7a7a4a59 HM	415	.shutdown = usb_hcd_platform_shutdown,
7a7a4a59 HM	416	.driver = {
7a7a4a59 HM	417	.name = "ehci-platform",
7a7a4a59 HM	418	.pm = &ehci_platform_pm_ops,
ae5e5f7b	419	.of_match_table = vt8500_ehci_ids,
776c15d0	420	.acpi_match_table = ACPI_PTR(ehci_acpi_match),
7a7a4a59 HM	421	}
7a7a4a59 HM	422	};
99f91934 AS	423
	424	static int __init ehci_platform_init(void)
	425	{
	426	if (usb_disabled())
	427	return -ENODEV;
	428
	429	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	430
	431	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	432	return platform_driver_register(&ehci_platform_driver);
	433	}
	434	module_init(ehci_platform_init);
	435
	436	static void __exit ehci_platform_cleanup(void)
	437	{
	438	platform_driver_unregister(&ehci_platform_driver);
	439	}
	440	module_exit(ehci_platform_cleanup);
	441
	442	MODULE_DESCRIPTION(DRIVER_DESC);
	443	MODULE_AUTHOR("Hauke Mehrtens");
	444	MODULE_AUTHOR("Alan Stern");
	445	MODULE_LICENSE("GPL");