[linux-2.6-block.git] / drivers / usb / host / xhci-plat.c

/*
 * xhci-plat.c - xHCI host controller driver platform Bus Glue.
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
 * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 *
 * A lot of code borrowed from the Linux xHCI driver.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/usb/xhci_pdriver.h>
#include <linux/acpi.h>

#include "xhci.h"
#include "xhci-plat.h"
#include "xhci-mvebu.h"
#include "xhci-rcar.h"

static struct hc_driver __read_mostly xhci_plat_hc_driver;

static int xhci_plat_setup(struct usb_hcd *hcd);
static int xhci_plat_start(struct usb_hcd *hcd);

static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
	.extra_priv_size = sizeof(struct xhci_plat_priv),
	.reset = xhci_plat_setup,
	.start = xhci_plat_start,
};

static void xhci_priv_plat_start(struct usb_hcd *hcd)
{
	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

	if (priv->plat_start)
		priv->plat_start(hcd);
}

static int xhci_priv_init_quirk(struct usb_hcd *hcd)
{
	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

	if (!priv->init_quirk)
		return 0;

	return priv->init_quirk(hcd);
}

static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
	/*
	 * As of now platform drivers don't provide MSI support so we ensure
	 * here that the generic code does not try to make a pci_dev from our
	 * dev struct in order to setup MSI
	 */
	xhci->quirks |= XHCI_PLAT;
}

/* called during probe() after chip reset completes */
static int xhci_plat_setup(struct usb_hcd *hcd)
{
	int ret;


	ret = xhci_priv_init_quirk(hcd);
	if (ret)
		return ret;

	return xhci_gen_setup(hcd, xhci_plat_quirks);
}

static int xhci_plat_start(struct usb_hcd *hcd)
{
	xhci_priv_plat_start(hcd);
	return xhci_run(hcd);
}

#ifdef CONFIG_OF
static const struct xhci_plat_priv xhci_plat_marvell_armada = {
	.init_quirk = xhci_mvebu_mbus_init_quirk,
};

static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
	.init_quirk = xhci_rcar_init_quirk,
	.plat_start = xhci_rcar_start,
};

static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
	.init_quirk = xhci_rcar_init_quirk,
	.plat_start = xhci_rcar_start,
};

static const struct of_device_id usb_xhci_of_match[] = {
	{
		.compatible = "generic-xhci",
	}, {
		.compatible = "xhci-platform",
	}, {
		.compatible = "marvell,armada-375-xhci",
		.data = &xhci_plat_marvell_armada,
	}, {
		.compatible = "marvell,armada-380-xhci",
		.data = &xhci_plat_marvell_armada,
	}, {
		.compatible = "renesas,xhci-r8a7790",
		.data = &xhci_plat_renesas_rcar_gen2,
	}, {
		.compatible = "renesas,xhci-r8a7791",
		.data = &xhci_plat_renesas_rcar_gen2,
	}, {
		.compatible = "renesas,xhci-r8a7793",
		.data = &xhci_plat_renesas_rcar_gen2,
	}, {
		.compatible = "renesas,xhci-r8a7795",
		.data = &xhci_plat_renesas_rcar_gen3,
	}, {
		.compatible = "renesas,rcar-gen2-xhci",
		.data = &xhci_plat_renesas_rcar_gen2,
	}, {
		.compatible = "renesas,rcar-gen3-xhci",
		.data = &xhci_plat_renesas_rcar_gen3,
	},
	{},
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif

static int xhci_plat_probe(struct platform_device *pdev)
{
	struct device_node	*node = pdev->dev.of_node;
	struct usb_xhci_pdata	*pdata = dev_get_platdata(&pdev->dev);
	const struct of_device_id *match;
	const struct hc_driver	*driver;
	struct xhci_hcd		*xhci;
	struct resource         *res;
	struct usb_hcd		*hcd;
	struct clk              *clk;
	int			ret;
	int			irq;

	if (usb_disabled())
		return -ENODEV;

	driver = &xhci_plat_hc_driver;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return -ENODEV;

	/* Try to set 64-bit DMA first */
	if (WARN_ON(!pdev->dev.dma_mask))
		/* Platform did not initialize dma_mask */
		ret = dma_coerce_mask_and_coherent(&pdev->dev,
						   DMA_BIT_MASK(64));
	else
		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));

	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	if (ret) {
		ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
		if (ret)
			return ret;
	}

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd)
		return -ENOMEM;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto put_hcd;
	}

	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	/*
	 * Not all platforms have a clk so it is not an error if the
	 * clock does not exists.
	 */
	clk = devm_clk_get(&pdev->dev, NULL);
	if (!IS_ERR(clk)) {
		ret = clk_prepare_enable(clk);
		if (ret)
			goto put_hcd;
	} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
		ret = -EPROBE_DEFER;
		goto put_hcd;
	}

	xhci = hcd_to_xhci(hcd);
	match = of_match_node(usb_xhci_of_match, node);
	if (match) {
		const struct xhci_plat_priv *priv_match = match->data;
		struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);

		/* Just copy data for now */
		if (priv_match)
			*priv = *priv_match;
	}

	device_wakeup_enable(hcd->self.controller);

	xhci->clk = clk;
	xhci->main_hcd = hcd;
	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
			dev_name(&pdev->dev), hcd);
	if (!xhci->shared_hcd) {
		ret = -ENOMEM;
		goto disable_clk;
	}

	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
			(pdata && pdata->usb3_lpm_capable))
		xhci->quirks |= XHCI_LPM_SUPPORT;

	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
		xhci->shared_hcd->can_do_streams = 1;

	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	if (IS_ERR(hcd->usb_phy)) {
		ret = PTR_ERR(hcd->usb_phy);
		if (ret == -EPROBE_DEFER)
			goto put_usb3_hcd;
		hcd->usb_phy = NULL;
	} else {
		ret = usb_phy_init(hcd->usb_phy);
		if (ret)
			goto put_usb3_hcd;
	}

	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	if (ret)
		goto disable_usb_phy;

	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	if (ret)
		goto dealloc_usb2_hcd;

	return 0;


dealloc_usb2_hcd:
	usb_remove_hcd(hcd);

disable_usb_phy:
	usb_phy_shutdown(hcd->usb_phy);

put_usb3_hcd:
	usb_put_hcd(xhci->shared_hcd);

disable_clk:
	if (!IS_ERR(clk))
		clk_disable_unprepare(clk);

put_hcd:
	usb_put_hcd(hcd);

	return ret;
}

static int xhci_plat_remove(struct platform_device *dev)
{
	struct usb_hcd	*hcd = platform_get_drvdata(dev);
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	struct clk *clk = xhci->clk;

	usb_remove_hcd(xhci->shared_hcd);
	usb_phy_shutdown(hcd->usb_phy);

	usb_remove_hcd(hcd);
	usb_put_hcd(xhci->shared_hcd);

	if (!IS_ERR(clk))
		clk_disable_unprepare(clk);
	usb_put_hcd(hcd);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int xhci_plat_suspend(struct device *dev)
{
	struct usb_hcd	*hcd = dev_get_drvdata(dev);
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);

	/*
	 * xhci_suspend() needs `do_wakeup` to know whether host is allowed
	 * to do wakeup during suspend. Since xhci_plat_suspend is currently
	 * only designed for system suspend, device_may_wakeup() is enough
	 * to dertermine whether host is allowed to do wakeup. Need to
	 * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
	 * also applies to runtime suspend.
	 */
	return xhci_suspend(xhci, device_may_wakeup(dev));
}

static int xhci_plat_resume(struct device *dev)
{
	struct usb_hcd	*hcd = dev_get_drvdata(dev);
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);

	return xhci_resume(xhci, 0);
}

static const struct dev_pm_ops xhci_plat_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
};
#define DEV_PM_OPS	(&xhci_plat_pm_ops)
#else
#define DEV_PM_OPS	NULL
#endif /* CONFIG_PM */

static const struct acpi_device_id usb_xhci_acpi_match[] = {
	/* XHCI-compliant USB Controller */
	{ "PNP0D10", },
	{ }
};
MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);

static struct platform_driver usb_xhci_driver = {
	.probe	= xhci_plat_probe,
	.remove	= xhci_plat_remove,
	.driver	= {
		.name = "xhci-hcd",
		.pm = DEV_PM_OPS,
		.of_match_table = of_match_ptr(usb_xhci_of_match),
		.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
	},
};
MODULE_ALIAS("platform:xhci-hcd");

static int __init xhci_plat_init(void)
{
	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
	return platform_driver_register(&usb_xhci_driver);
}
module_init(xhci_plat_init);

static void __exit xhci_plat_exit(void)
{
	platform_driver_unregister(&usb_xhci_driver);
}
module_exit(xhci_plat_exit);

MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
3429e91a SAS	1	/*
	2	* xhci-plat.c - xHCI host controller driver platform Bus Glue.
	3	*
	4	* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
	5	* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	6	*
	7	* A lot of code borrowed from the Linux xHCI driver.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* version 2 as published by the Free Software Foundation.
	12	*/
	13
4718c177	14	#include <linux/clk.h>
48157bb9	15	#include <linux/dma-mapping.h>
3429e91a	16	#include <linux/module.h>
1fe6c452	17	#include <linux/of.h>
48157bb9	18	#include <linux/platform_device.h>
7b8ef22e	19	#include <linux/usb/phy.h>
48157bb9	20	#include <linux/slab.h>
20f6fdd0	21	#include <linux/usb/xhci_pdriver.h>
579085b5	22	#include <linux/acpi.h>
3429e91a SAS	23
3429e91a SAS	24	#include "xhci.h"
4efb2f69	25	#include "xhci-plat.h"
97374792	26	#include "xhci-mvebu.h"
4ac8918f	27	#include "xhci-rcar.h"
3429e91a	28
1885d9a3 AB	29	static struct hc_driver __read_mostly xhci_plat_hc_driver;
1885d9a3 AB	30
cd33a321 RQ	31	static int xhci_plat_setup(struct usb_hcd *hcd);
	32	static int xhci_plat_start(struct usb_hcd *hcd);
	33
	34	static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
4efb2f69	35	.extra_priv_size = sizeof(struct xhci_plat_priv),
cd33a321 RQ	36	.reset = xhci_plat_setup,
	37	.start = xhci_plat_start,
	38	};
	39
b1c127ae	40	static void xhci_priv_plat_start(struct usb_hcd *hcd)
3429e91a	41	{
b1c127ae FB	42	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	43
	44	if (priv->plat_start)
	45	priv->plat_start(hcd);
	46	}
	47
	48	static int xhci_priv_init_quirk(struct usb_hcd *hcd)
	49	{
	50	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	51
	52	if (!priv->init_quirk)
	53	return 0;
	54
	55	return priv->init_quirk(hcd);
	56	}
5ad3b03e	57
b1c127ae FB	58	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
b1c127ae FB	59	{
3429e91a SAS	60	/*
	61	* As of now platform drivers don't provide MSI support so we ensure
	62	* here that the generic code does not try to make a pci_dev from our
	63	* dev struct in order to setup MSI
	64	*/
52fb6125	65	xhci->quirks \|= XHCI_PLAT;
3429e91a SAS	66	}
	67
	68	/* called during probe() after chip reset completes */
	69	static int xhci_plat_setup(struct usb_hcd *hcd)
	70	{
4ac8918f YS	71	int ret;
4ac8918f YS	72
4ac8918f	73
b1c127ae FB	74	ret = xhci_priv_init_quirk(hcd);
	75	if (ret)
	76	return ret;
3bdb263d	77
3429e91a SAS	78	return xhci_gen_setup(hcd, xhci_plat_quirks);
	79	}
	80
94adcdce YS	81	static int xhci_plat_start(struct usb_hcd *hcd)
94adcdce YS	82	{
b1c127ae	83	xhci_priv_plat_start(hcd);
94adcdce YS	84	return xhci_run(hcd);
	85	}
	86
4efb2f69 YS	87	#ifdef CONFIG_OF
4efb2f69 YS	88	static const struct xhci_plat_priv xhci_plat_marvell_armada = {
b1c127ae	89	.init_quirk = xhci_mvebu_mbus_init_quirk,
4efb2f69 YS	90	};
	91
	92	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
9bf9d9d6	93	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
b1c127ae FB	94	.init_quirk = xhci_rcar_init_quirk,
b1c127ae FB	95	.plat_start = xhci_rcar_start,
4efb2f69 YS	96	};
4efb2f69 YS	97
526a240f	98	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
526a240f	99	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
b1c127ae FB	100	.init_quirk = xhci_rcar_init_quirk,
b1c127ae FB	101	.plat_start = xhci_rcar_start,
526a240f YS	102	};
526a240f YS	103
4efb2f69 YS	104	static const struct of_device_id usb_xhci_of_match[] = {
	105	{
	106	.compatible = "generic-xhci",
	107	}, {
	108	.compatible = "xhci-platform",
	109	}, {
	110	.compatible = "marvell,armada-375-xhci",
	111	.data = &xhci_plat_marvell_armada,
	112	}, {
	113	.compatible = "marvell,armada-380-xhci",
	114	.data = &xhci_plat_marvell_armada,
	115	}, {
	116	.compatible = "renesas,xhci-r8a7790",
	117	.data = &xhci_plat_renesas_rcar_gen2,
	118	}, {
	119	.compatible = "renesas,xhci-r8a7791",
	120	.data = &xhci_plat_renesas_rcar_gen2,
82487b71 YS	121	}, {
	122	.compatible = "renesas,xhci-r8a7793",
	123	.data = &xhci_plat_renesas_rcar_gen2,
526a240f YS	124	}, {
	125	.compatible = "renesas,xhci-r8a7795",
	126	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	127	}, {
f1bbdc3b SH	128	.compatible = "renesas,rcar-gen2-xhci",
	129	.data = &xhci_plat_renesas_rcar_gen2,
	130	}, {
	131	.compatible = "renesas,rcar-gen3-xhci",
	132	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	133	},
ff075d67	134	{},
4efb2f69 YS	135	};
	136	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	137	#endif
	138
3429e91a SAS	139	static int xhci_plat_probe(struct platform_device *pdev)
3429e91a SAS	140	{
20f6fdd0 PA	141	struct device_node *node = pdev->dev.of_node;
20f6fdd0 PA	142	struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
4efb2f69	143	const struct of_device_id *match;
3429e91a SAS	144	const struct hc_driver *driver;
	145	struct xhci_hcd *xhci;
	146	struct resource *res;
	147	struct usb_hcd *hcd;
4718c177	148	struct clk *clk;
3429e91a SAS	149	int ret;
	150	int irq;
	151
	152	if (usb_disabled())
	153	return -ENODEV;
	154
1885d9a3	155	driver = &xhci_plat_hc_driver;
3429e91a SAS	156
	157	irq = platform_get_irq(pdev, 0);
	158	if (irq < 0)
	159	return -ENODEV;
	160
0ebbe398 DD	161	/* Try to set 64-bit DMA first */
	162	if (WARN_ON(!pdev->dev.dma_mask))
	163	/* Platform did not initialize dma_mask */
	164	ret = dma_coerce_mask_and_coherent(&pdev->dev,
	165	DMA_BIT_MASK(64));
c10cf118	166	else
0ebbe398 DD	167	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	168
	169	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	170	if (ret) {
	171	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	172	if (ret)
	173	return ret;
	174	}
c10cf118	175
3429e91a SAS	176	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	177	if (!hcd)
	178	return -ENOMEM;
	179
e7020f19	180	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fd666348 HS	181	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	182	if (IS_ERR(hcd->regs)) {
	183	ret = PTR_ERR(hcd->regs);
3429e91a SAS	184	goto put_hcd;
	185	}
	186
e7020f19 VB	187	hcd->rsrc_start = res->start;
	188	hcd->rsrc_len = resource_size(res);
	189
4718c177 GC	190	/*
	191	* Not all platforms have a clk so it is not an error if the
	192	* clock does not exists.
	193	*/
	194	clk = devm_clk_get(&pdev->dev, NULL);
	195	if (!IS_ERR(clk)) {
	196	ret = clk_prepare_enable(clk);
	197	if (ret)
fd666348	198	goto put_hcd;
de95c40d TP	199	} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
	200	ret = -EPROBE_DEFER;
	201	goto put_hcd;
4718c177 GC	202	}
4718c177 GC	203
4efb2f69 YS	204	xhci = hcd_to_xhci(hcd);
	205	match = of_match_node(usb_xhci_of_match, node);
	206	if (match) {
	207	const struct xhci_plat_priv *priv_match = match->data;
	208	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	209
	210	/* Just copy data for now */
2ad294d5 GC	211	if (priv_match)
2ad294d5 GC	212	priv = priv_match;
4efb2f69 YS	213	}
4efb2f69 YS	214
3c9740a1	215	device_wakeup_enable(hcd->self.controller);
3429e91a	216
4718c177	217	xhci->clk = clk;
9fa733f2	218	xhci->main_hcd = hcd;
3429e91a SAS	219	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	220	dev_name(&pdev->dev), hcd);
	221	if (!xhci->shared_hcd) {
	222	ret = -ENOMEM;
4ac53087	223	goto disable_clk;
3429e91a SAS	224	}
3429e91a SAS	225
20f6fdd0 PA	226	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) \|\|
	227	(pdata && pdata->usb3_lpm_capable))
	228	xhci->quirks \|= XHCI_LPM_SUPPORT;
3429e91a	229
14aec589 ON	230	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
	231	xhci->shared_hcd->can_do_streams = 1;
	232
7b8ef22e MR	233	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	234	if (IS_ERR(hcd->usb_phy)) {
	235	ret = PTR_ERR(hcd->usb_phy);
	236	if (ret == -EPROBE_DEFER)
	237	goto put_usb3_hcd;
	238	hcd->usb_phy = NULL;
	239	} else {
	240	ret = usb_phy_init(hcd->usb_phy);
	241	if (ret)
	242	goto put_usb3_hcd;
	243	}
	244
4ac53087	245	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
3429e91a	246	if (ret)
7b8ef22e	247	goto disable_usb_phy;
3429e91a	248
4ac53087 RQ	249	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	250	if (ret)
	251	goto dealloc_usb2_hcd;
	252
3429e91a SAS	253	return 0;
3429e91a SAS	254
4ac53087 RQ	255
	256	dealloc_usb2_hcd:
	257	usb_remove_hcd(hcd);
	258
7b8ef22e MR	259	disable_usb_phy:
	260	usb_phy_shutdown(hcd->usb_phy);
	261
3429e91a SAS	262	put_usb3_hcd:
	263	usb_put_hcd(xhci->shared_hcd);
	264
4718c177 GC	265	disable_clk:
	266	if (!IS_ERR(clk))
	267	clk_disable_unprepare(clk);
	268
3429e91a SAS	269	put_hcd:
	270	usb_put_hcd(hcd);
	271
	272	return ret;
	273	}
	274
	275	static int xhci_plat_remove(struct platform_device *dev)
	276	{
	277	struct usb_hcd *hcd = platform_get_drvdata(dev);
	278	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
4718c177	279	struct clk *clk = xhci->clk;
3429e91a SAS	280
3429e91a SAS	281	usb_remove_hcd(xhci->shared_hcd);
7b8ef22e	282	usb_phy_shutdown(hcd->usb_phy);
3429e91a SAS	283
3429e91a SAS	284	usb_remove_hcd(hcd);
4ac53087 RQ	285	usb_put_hcd(xhci->shared_hcd);
4ac53087 RQ	286
4718c177 GC	287	if (!IS_ERR(clk))
4718c177 GC	288	clk_disable_unprepare(clk);
3429e91a	289	usb_put_hcd(hcd);
3429e91a SAS	290
	291	return 0;
	292	}
	293
274f6afa	294	#ifdef CONFIG_PM_SLEEP
57d04eb1 VS	295	static int xhci_plat_suspend(struct device *dev)
	296	{
	297	struct usb_hcd *hcd = dev_get_drvdata(dev);
	298	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	299
a1377e53 LB	300	/*
	301	* xhci_suspend() needs `do_wakeup` to know whether host is allowed
	302	* to do wakeup during suspend. Since xhci_plat_suspend is currently
	303	* only designed for system suspend, device_may_wakeup() is enough
	304	* to dertermine whether host is allowed to do wakeup. Need to
	305	* reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
	306	* also applies to runtime suspend.
	307	*/
	308	return xhci_suspend(xhci, device_may_wakeup(dev));
57d04eb1 VS	309	}
	310
	311	static int xhci_plat_resume(struct device *dev)
	312	{
	313	struct usb_hcd *hcd = dev_get_drvdata(dev);
	314	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	315
	316	return xhci_resume(xhci, 0);
	317	}
	318
	319	static const struct dev_pm_ops xhci_plat_pm_ops = {
	320	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	321	};
	322	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	323	#else
	324	#define DEV_PM_OPS NULL
	325	#endif /* CONFIG_PM */
	326
579085b5 DD	327	static const struct acpi_device_id usb_xhci_acpi_match[] = {
	328	/* XHCI-compliant USB Controller */
	329	{ "PNP0D10", },
	330	{ }
	331	};
	332	MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
	333
3429e91a SAS	334	static struct platform_driver usb_xhci_driver = {
	335	.probe = xhci_plat_probe,
	336	.remove = xhci_plat_remove,
	337	.driver = {
	338	.name = "xhci-hcd",
57d04eb1	339	.pm = DEV_PM_OPS,
1fe6c452	340	.of_match_table = of_match_ptr(usb_xhci_of_match),
579085b5	341	.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
3429e91a SAS	342	},
	343	};
	344	MODULE_ALIAS("platform:xhci-hcd");
	345
29e409f0	346	static int __init xhci_plat_init(void)
3429e91a	347	{
cd33a321	348	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
3429e91a SAS	349	return platform_driver_register(&usb_xhci_driver);
3429e91a SAS	350	}
29e409f0	351	module_init(xhci_plat_init);
3429e91a	352
29e409f0	353	static void __exit xhci_plat_exit(void)
3429e91a SAS	354	{
	355	platform_driver_unregister(&usb_xhci_driver);
	356	}
29e409f0 AB	357	module_exit(xhci_plat_exit);
	358
	359	MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
	360	MODULE_LICENSE("GPL");