[deliverable/linux.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/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)
{
	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, pdev->dev.of_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 (device_property_read_bool(&pdev->dev, "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>
579085b5	21	#include <linux/acpi.h>
3429e91a SAS	22
3429e91a SAS	23	#include "xhci.h"
4efb2f69	24	#include "xhci-plat.h"
97374792	25	#include "xhci-mvebu.h"
4ac8918f	26	#include "xhci-rcar.h"
3429e91a	27
1885d9a3 AB	28	static struct hc_driver __read_mostly xhci_plat_hc_driver;
1885d9a3 AB	29
cd33a321 RQ	30	static int xhci_plat_setup(struct usb_hcd *hcd);
	31	static int xhci_plat_start(struct usb_hcd *hcd);
	32
	33	static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
4efb2f69	34	.extra_priv_size = sizeof(struct xhci_plat_priv),
cd33a321 RQ	35	.reset = xhci_plat_setup,
	36	.start = xhci_plat_start,
	37	};
	38
b1c127ae	39	static void xhci_priv_plat_start(struct usb_hcd *hcd)
3429e91a	40	{
b1c127ae FB	41	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	42
	43	if (priv->plat_start)
	44	priv->plat_start(hcd);
	45	}
	46
	47	static int xhci_priv_init_quirk(struct usb_hcd *hcd)
	48	{
	49	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	50
	51	if (!priv->init_quirk)
	52	return 0;
	53
	54	return priv->init_quirk(hcd);
	55	}
5ad3b03e	56
b1c127ae FB	57	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
b1c127ae FB	58	{
3429e91a SAS	59	/*
	60	* As of now platform drivers don't provide MSI support so we ensure
	61	* here that the generic code does not try to make a pci_dev from our
	62	* dev struct in order to setup MSI
	63	*/
52fb6125	64	xhci->quirks \|= XHCI_PLAT;
3429e91a SAS	65	}
	66
	67	/* called during probe() after chip reset completes */
	68	static int xhci_plat_setup(struct usb_hcd *hcd)
	69	{
4ac8918f YS	70	int ret;
4ac8918f YS	71
4ac8918f	72
b1c127ae FB	73	ret = xhci_priv_init_quirk(hcd);
	74	if (ret)
	75	return ret;
3bdb263d	76
3429e91a SAS	77	return xhci_gen_setup(hcd, xhci_plat_quirks);
	78	}
	79
94adcdce YS	80	static int xhci_plat_start(struct usb_hcd *hcd)
94adcdce YS	81	{
b1c127ae	82	xhci_priv_plat_start(hcd);
94adcdce YS	83	return xhci_run(hcd);
	84	}
	85
4efb2f69 YS	86	#ifdef CONFIG_OF
4efb2f69 YS	87	static const struct xhci_plat_priv xhci_plat_marvell_armada = {
b1c127ae	88	.init_quirk = xhci_mvebu_mbus_init_quirk,
4efb2f69 YS	89	};
	90
	91	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
9bf9d9d6	92	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
b1c127ae FB	93	.init_quirk = xhci_rcar_init_quirk,
b1c127ae FB	94	.plat_start = xhci_rcar_start,
4efb2f69 YS	95	};
4efb2f69 YS	96
526a240f	97	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
526a240f	98	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
b1c127ae FB	99	.init_quirk = xhci_rcar_init_quirk,
b1c127ae FB	100	.plat_start = xhci_rcar_start,
526a240f YS	101	};
526a240f YS	102
4efb2f69 YS	103	static const struct of_device_id usb_xhci_of_match[] = {
	104	{
	105	.compatible = "generic-xhci",
	106	}, {
	107	.compatible = "xhci-platform",
	108	}, {
	109	.compatible = "marvell,armada-375-xhci",
	110	.data = &xhci_plat_marvell_armada,
	111	}, {
	112	.compatible = "marvell,armada-380-xhci",
	113	.data = &xhci_plat_marvell_armada,
	114	}, {
	115	.compatible = "renesas,xhci-r8a7790",
	116	.data = &xhci_plat_renesas_rcar_gen2,
	117	}, {
	118	.compatible = "renesas,xhci-r8a7791",
	119	.data = &xhci_plat_renesas_rcar_gen2,
82487b71 YS	120	}, {
	121	.compatible = "renesas,xhci-r8a7793",
	122	.data = &xhci_plat_renesas_rcar_gen2,
526a240f YS	123	}, {
	124	.compatible = "renesas,xhci-r8a7795",
	125	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	126	}, {
f1bbdc3b SH	127	.compatible = "renesas,rcar-gen2-xhci",
	128	.data = &xhci_plat_renesas_rcar_gen2,
	129	}, {
	130	.compatible = "renesas,rcar-gen3-xhci",
	131	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	132	},
ff075d67	133	{},
4efb2f69 YS	134	};
	135	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	136	#endif
	137
3429e91a SAS	138	static int xhci_plat_probe(struct platform_device *pdev)
3429e91a SAS	139	{
4efb2f69	140	const struct of_device_id *match;
3429e91a SAS	141	const struct hc_driver *driver;
	142	struct xhci_hcd *xhci;
	143	struct resource *res;
	144	struct usb_hcd *hcd;
4718c177	145	struct clk *clk;
3429e91a SAS	146	int ret;
	147	int irq;
	148
	149	if (usb_disabled())
	150	return -ENODEV;
	151
1885d9a3	152	driver = &xhci_plat_hc_driver;
3429e91a SAS	153
	154	irq = platform_get_irq(pdev, 0);
	155	if (irq < 0)
	156	return -ENODEV;
	157
0ebbe398 DD	158	/* Try to set 64-bit DMA first */
	159	if (WARN_ON(!pdev->dev.dma_mask))
	160	/* Platform did not initialize dma_mask */
	161	ret = dma_coerce_mask_and_coherent(&pdev->dev,
	162	DMA_BIT_MASK(64));
c10cf118	163	else
0ebbe398 DD	164	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	165
	166	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	167	if (ret) {
	168	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	169	if (ret)
	170	return ret;
	171	}
c10cf118	172
3429e91a SAS	173	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	174	if (!hcd)
	175	return -ENOMEM;
	176
e7020f19	177	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fd666348 HS	178	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	179	if (IS_ERR(hcd->regs)) {
	180	ret = PTR_ERR(hcd->regs);
3429e91a SAS	181	goto put_hcd;
	182	}
	183
e7020f19 VB	184	hcd->rsrc_start = res->start;
	185	hcd->rsrc_len = resource_size(res);
	186
4718c177 GC	187	/*
	188	* Not all platforms have a clk so it is not an error if the
	189	* clock does not exists.
	190	*/
	191	clk = devm_clk_get(&pdev->dev, NULL);
	192	if (!IS_ERR(clk)) {
	193	ret = clk_prepare_enable(clk);
	194	if (ret)
fd666348	195	goto put_hcd;
de95c40d TP	196	} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
	197	ret = -EPROBE_DEFER;
	198	goto put_hcd;
4718c177 GC	199	}
4718c177 GC	200
4efb2f69	201	xhci = hcd_to_xhci(hcd);
76f9502f	202	match = of_match_node(usb_xhci_of_match, pdev->dev.of_node);
4efb2f69 YS	203	if (match) {
	204	const struct xhci_plat_priv *priv_match = match->data;
	205	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	206
	207	/* Just copy data for now */
2ad294d5 GC	208	if (priv_match)
2ad294d5 GC	209	priv = priv_match;
4efb2f69 YS	210	}
4efb2f69 YS	211
3c9740a1	212	device_wakeup_enable(hcd->self.controller);
3429e91a	213
4718c177	214	xhci->clk = clk;
9fa733f2	215	xhci->main_hcd = hcd;
3429e91a SAS	216	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	217	dev_name(&pdev->dev), hcd);
	218	if (!xhci->shared_hcd) {
	219	ret = -ENOMEM;
4ac53087	220	goto disable_clk;
3429e91a SAS	221	}
3429e91a SAS	222
a3aef379	223	if (device_property_read_bool(&pdev->dev, "usb3-lpm-capable"))
20f6fdd0	224	xhci->quirks \|= XHCI_LPM_SUPPORT;
3429e91a	225
14aec589 ON	226	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
	227	xhci->shared_hcd->can_do_streams = 1;
	228
7b8ef22e MR	229	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	230	if (IS_ERR(hcd->usb_phy)) {
	231	ret = PTR_ERR(hcd->usb_phy);
	232	if (ret == -EPROBE_DEFER)
	233	goto put_usb3_hcd;
	234	hcd->usb_phy = NULL;
	235	} else {
	236	ret = usb_phy_init(hcd->usb_phy);
	237	if (ret)
	238	goto put_usb3_hcd;
	239	}
	240
4ac53087	241	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
3429e91a	242	if (ret)
7b8ef22e	243	goto disable_usb_phy;
3429e91a	244
4ac53087 RQ	245	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	246	if (ret)
	247	goto dealloc_usb2_hcd;
	248
3429e91a SAS	249	return 0;
3429e91a SAS	250
4ac53087 RQ	251
	252	dealloc_usb2_hcd:
	253	usb_remove_hcd(hcd);
	254
7b8ef22e MR	255	disable_usb_phy:
	256	usb_phy_shutdown(hcd->usb_phy);
	257
3429e91a SAS	258	put_usb3_hcd:
	259	usb_put_hcd(xhci->shared_hcd);
	260
4718c177 GC	261	disable_clk:
	262	if (!IS_ERR(clk))
	263	clk_disable_unprepare(clk);
	264
3429e91a SAS	265	put_hcd:
	266	usb_put_hcd(hcd);
	267
	268	return ret;
	269	}
	270
	271	static int xhci_plat_remove(struct platform_device *dev)
	272	{
	273	struct usb_hcd *hcd = platform_get_drvdata(dev);
	274	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
4718c177	275	struct clk *clk = xhci->clk;
3429e91a SAS	276
3429e91a SAS	277	usb_remove_hcd(xhci->shared_hcd);
7b8ef22e	278	usb_phy_shutdown(hcd->usb_phy);
3429e91a SAS	279
3429e91a SAS	280	usb_remove_hcd(hcd);
4ac53087 RQ	281	usb_put_hcd(xhci->shared_hcd);
4ac53087 RQ	282
4718c177 GC	283	if (!IS_ERR(clk))
4718c177 GC	284	clk_disable_unprepare(clk);
3429e91a	285	usb_put_hcd(hcd);
3429e91a SAS	286
	287	return 0;
	288	}
	289
274f6afa	290	#ifdef CONFIG_PM_SLEEP
57d04eb1 VS	291	static int xhci_plat_suspend(struct device *dev)
	292	{
	293	struct usb_hcd *hcd = dev_get_drvdata(dev);
	294	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	295
a1377e53 LB	296	/*
	297	* xhci_suspend() needs `do_wakeup` to know whether host is allowed
	298	* to do wakeup during suspend. Since xhci_plat_suspend is currently
	299	* only designed for system suspend, device_may_wakeup() is enough
	300	* to dertermine whether host is allowed to do wakeup. Need to
	301	* reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
	302	* also applies to runtime suspend.
	303	*/
	304	return xhci_suspend(xhci, device_may_wakeup(dev));
57d04eb1 VS	305	}
	306
	307	static int xhci_plat_resume(struct device *dev)
	308	{
	309	struct usb_hcd *hcd = dev_get_drvdata(dev);
	310	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	311
	312	return xhci_resume(xhci, 0);
	313	}
	314
	315	static const struct dev_pm_ops xhci_plat_pm_ops = {
	316	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	317	};
	318	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	319	#else
	320	#define DEV_PM_OPS NULL
	321	#endif /* CONFIG_PM */
	322
579085b5 DD	323	static const struct acpi_device_id usb_xhci_acpi_match[] = {
	324	/* XHCI-compliant USB Controller */
	325	{ "PNP0D10", },
	326	{ }
	327	};
	328	MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
	329
3429e91a SAS	330	static struct platform_driver usb_xhci_driver = {
	331	.probe = xhci_plat_probe,
	332	.remove = xhci_plat_remove,
	333	.driver = {
	334	.name = "xhci-hcd",
57d04eb1	335	.pm = DEV_PM_OPS,
1fe6c452	336	.of_match_table = of_match_ptr(usb_xhci_of_match),
579085b5	337	.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
3429e91a SAS	338	},
	339	};
	340	MODULE_ALIAS("platform:xhci-hcd");
	341
29e409f0	342	static int __init xhci_plat_init(void)
3429e91a	343	{
cd33a321	344	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
3429e91a SAS	345	return platform_driver_register(&usb_xhci_driver);
3429e91a SAS	346	}
29e409f0	347	module_init(xhci_plat_init);
3429e91a	348
29e409f0	349	static void __exit xhci_plat_exit(void)
3429e91a SAS	350	{
	351	platform_driver_unregister(&usb_xhci_driver);
	352	}
29e409f0 AB	353	module_exit(xhci_plat_exit);
	354
	355	MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
	356	MODULE_LICENSE("GPL");