[mirror_ubuntu-jammy-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
 *
 * 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 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
	20	*
	21	* Licensed under the GNU/GPL. See COPYING for details.
	22	*/
776c15d0	23	#include <linux/acpi.h>
a4aeb211	24	#include <linux/clk.h>
f3bc64d6	25	#include <linux/dma-mapping.h>
148e1134	26	#include <linux/err.h>
99f91934	27	#include <linux/kernel.h>
d1bb67a7 AS	28	#include <linux/hrtimer.h>
d1bb67a7 AS	29	#include <linux/io.h>
99f91934	30	#include <linux/module.h>
f3bc64d6	31	#include <linux/of.h>
a4aeb211	32	#include <linux/phy/phy.h>
7a7a4a59	33	#include <linux/platform_device.h>
2d87bbd6	34	#include <linux/reset.h>
99f91934 AS	35	#include <linux/usb.h>
99f91934 AS	36	#include <linux/usb/hcd.h>
7a7a4a59	37	#include <linux/usb/ehci_pdriver.h>
d4d75128	38	#include <linux/usb/of.h>
7a7a4a59	39
99f91934 AS	40	#include "ehci.h"
	41
	42	#define DRIVER_DESC "EHCI generic platform driver"
73577d61	43	#define EHCI_MAX_CLKS 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];
8e84f8aa	48	struct reset_control *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;
8e84f8aa	154	int err, irq, phy_num, clk = 0;
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
8e84f8aa MY	242	priv->rsts = devm_reset_control_array_get_optional_shared(&dev->dev);
	243	if (IS_ERR(priv->rsts)) {
	244	err = PTR_ERR(priv->rsts);
	245	goto err_put_clks;
2d87bbd6 BB	246	}
2d87bbd6 BB	247
8e84f8aa MY	248	err = reset_control_deassert(priv->rsts);
	249	if (err)
	250	goto err_put_clks;
	251
843d5e03 AS	252	if (pdata->big_endian_desc)
	253	ehci->big_endian_desc = 1;
	254	if (pdata->big_endian_mmio)
	255	ehci->big_endian_mmio = 1;
b4629a7b AB	256	if (pdata->has_tt)
	257	hcd->has_tt = 1;
	258	if (pdata->reset_on_resume)
	259	priv->reset_on_resume = true;
843d5e03 AS	260
	261	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
	262	if (ehci->big_endian_mmio) {
	263	dev_err(&dev->dev,
	264	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_MMIO not set\n");
	265	err = -EINVAL;
2d87bbd6	266	goto err_reset;
843d5e03 AS	267	}
	268	#endif
	269	#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
	270	if (ehci->big_endian_desc) {
	271	dev_err(&dev->dev,
	272	"Error: CONFIG_USB_EHCI_BIG_ENDIAN_DESC not set\n");
	273	err = -EINVAL;
2d87bbd6	274	goto err_reset;
843d5e03 AS	275	}
	276	#endif
	277
04216bed KM	278	if (pdata->power_on) {
	279	err = pdata->power_on(dev);
	280	if (err < 0)
2d87bbd6	281	goto err_reset;
04216bed	282	}
7a7a4a59	283
2062ff48	284	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
148e1134 TR	285	hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
	286	if (IS_ERR(hcd->regs)) {
	287	err = PTR_ERR(hcd->regs);
a4aeb211	288	goto err_power;
ec03ad85	289	}
2062ff48 VB	290	hcd->rsrc_start = res_mem->start;
	291	hcd->rsrc_len = resource_size(res_mem);
	292
7a7a4a59 HM	293	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
7a7a4a59 HM	294	if (err)
a4aeb211	295	goto err_power;
7a7a4a59	296
3c9740a1	297	device_wakeup_enable(hcd->self.controller);
d4d75128	298	device_enable_async_suspend(hcd->self.controller);
7a7a4a59 HM	299	platform_set_drvdata(dev, hcd);
	300
	301	return err;
	302
04216bed KM	303	err_power:
	304	if (pdata->power_off)
	305	pdata->power_off(dev);
2d87bbd6	306	err_reset:
8e84f8aa	307	reset_control_assert(priv->rsts);
a4aeb211 HG	308	err_put_clks:
	309	while (--clk >= 0)
	310	clk_put(priv->clks[clk]);
	311	err_put_hcd:
	312	if (pdata == &ehci_platform_defaults)
	313	dev->dev.platform_data = NULL;
	314
	315	usb_put_hcd(hcd);
04216bed	316
7a7a4a59 HM	317	return err;
	318	}
	319
fb4e98ab	320	static int ehci_platform_remove(struct platform_device *dev)
7a7a4a59 HM	321	{
7a7a4a59 HM	322	struct usb_hcd *hcd = platform_get_drvdata(dev);
d4f09e28	323	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
a4aeb211	324	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
8e84f8aa	325	int clk;
7a7a4a59 HM	326
7a7a4a59 HM	327	usb_remove_hcd(hcd);
7a7a4a59	328
04216bed KM	329	if (pdata->power_off)
	330	pdata->power_off(dev);
	331
8e84f8aa	332	reset_control_assert(priv->rsts);
2d87bbd6	333
a4aeb211 HG	334	for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
	335	clk_put(priv->clks[clk]);
	336
	337	usb_put_hcd(hcd);
	338
f3bc64d6 AB	339	if (pdata == &ehci_platform_defaults)
	340	dev->dev.platform_data = NULL;
	341
7a7a4a59 HM	342	return 0;
	343	}
	344
5e4ccd9e	345	#ifdef CONFIG_PM_SLEEP
7a7a4a59 HM	346	static int ehci_platform_suspend(struct device *dev)
	347	{
	348	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	349	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
20db5513	350	struct platform_device *pdev = to_platform_device(dev);
c5cf9212	351	bool do_wakeup = device_may_wakeup(dev);
04216bed KM	352	int ret;
	353
	354	ret = ehci_suspend(hcd, do_wakeup);
e155b5b8 VG	355	if (ret)
e155b5b8 VG	356	return ret;
7a7a4a59	357
04216bed KM	358	if (pdata->power_suspend)
	359	pdata->power_suspend(pdev);
	360
	361	return ret;
7a7a4a59 HM	362	}
	363
	364	static int ehci_platform_resume(struct device *dev)
	365	{
	366	struct usb_hcd *hcd = dev_get_drvdata(dev);
d4f09e28	367	struct usb_ehci_pdata *pdata = dev_get_platdata(dev);
20db5513	368	struct platform_device *pdev = to_platform_device(dev);
b4629a7b	369	struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
d4d75128	370	struct device *companion_dev;
04216bed KM	371
	372	if (pdata->power_on) {
	373	int err = pdata->power_on(pdev);
	374	if (err < 0)
	375	return err;
	376	}
7a7a4a59	377
d4d75128	378	companion_dev = usb_of_get_companion_dev(hcd->self.controller);
a7415477	379	if (companion_dev) {
d4d75128	380	device_pm_wait_for_dev(hcd->self.controller, companion_dev);
a7415477 JH	381	put_device(companion_dev);
a7415477 JH	382	}
d4d75128	383
b4629a7b	384	ehci_resume(hcd, priv->reset_on_resume);
7a7a4a59 HM	385	return 0;
7a7a4a59 HM	386	}
5e4ccd9e	387	#endif /* CONFIG_PM_SLEEP */
7a7a4a59	388
f3bc64d6 AB	389	static const struct of_device_id vt8500_ehci_ids[] = {
	390	{ .compatible = "via,vt8500-ehci", },
	391	{ .compatible = "wm,prizm-ehci", },
915974c3	392	{ .compatible = "generic-ehci", },
a95cfa6b	393	{ .compatible = "cavium,octeon-6335-ehci", },
f3bc64d6 AB	394	{}
f3bc64d6 AB	395	};
a4aeb211	396	MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
f3bc64d6	397
776c15d0 JL	398	static const struct acpi_device_id ehci_acpi_match[] = {
	399	{ "PNP0D20", 0 }, /* EHCI controller without debug */
	400	{ }
	401	};
	402	MODULE_DEVICE_TABLE(acpi, ehci_acpi_match);
	403
7a7a4a59 HM	404	static const struct platform_device_id ehci_platform_table[] = {
	405	{ "ehci-platform", 0 },
	406	{ }
	407	};
	408	MODULE_DEVICE_TABLE(platform, ehci_platform_table);
	409
5e4ccd9e WK	410	static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
5e4ccd9e WK	411	ehci_platform_resume);
7a7a4a59 HM	412
	413	static struct platform_driver ehci_platform_driver = {
	414	.id_table = ehci_platform_table,
	415	.probe = ehci_platform_probe,
7690417d	416	.remove = ehci_platform_remove,
7a7a4a59 HM	417	.shutdown = usb_hcd_platform_shutdown,
7a7a4a59 HM	418	.driver = {
7a7a4a59 HM	419	.name = "ehci-platform",
7a7a4a59 HM	420	.pm = &ehci_platform_pm_ops,
ae5e5f7b	421	.of_match_table = vt8500_ehci_ids,
776c15d0	422	.acpi_match_table = ACPI_PTR(ehci_acpi_match),
7a7a4a59 HM	423	}
7a7a4a59 HM	424	};
99f91934 AS	425
	426	static int __init ehci_platform_init(void)
	427	{
	428	if (usb_disabled())
	429	return -ENODEV;
	430
	431	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	432
	433	ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
	434	return platform_driver_register(&ehci_platform_driver);
	435	}
	436	module_init(ehci_platform_init);
	437
	438	static void __exit ehci_platform_cleanup(void)
	439	{
	440	platform_driver_unregister(&ehci_platform_driver);
	441	}
	442	module_exit(ehci_platform_cleanup);
	443
	444	MODULE_DESCRIPTION(DRIVER_DESC);
	445	MODULE_AUTHOR("Hauke Mehrtens");
	446	MODULE_AUTHOR("Alan Stern");
	447	MODULE_LICENSE("GPL");