[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_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;

	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
	    xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) {
		ret = xhci_rcar_init_quirk(hcd);
		if (ret)
			return ret;
	}

	return xhci_gen_setup(hcd, xhci_plat_quirks);
}

static int xhci_plat_start(struct usb_hcd *hcd)
{
	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
	    xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
		xhci_rcar_start(hcd);

	return xhci_run(hcd);
}

#ifdef CONFIG_OF
static const struct xhci_plat_priv xhci_plat_marvell_armada = {
	.type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
};

static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
};

static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
};

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,
	}, {
	},
};
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;
	}

	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;
	}

	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) {
		ret = xhci_mvebu_mbus_init_quirk(pdev);
		if (ret)
			goto disable_clk;
	}

	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
3429e91a SAS	40	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
	41	{
	42	/*
	43	* As of now platform drivers don't provide MSI support so we ensure
	44	* here that the generic code does not try to make a pci_dev from our
	45	* dev struct in order to setup MSI
	46	*/
52fb6125	47	xhci->quirks \|= XHCI_PLAT;
3429e91a SAS	48	}
	49
	50	/* called during probe() after chip reset completes */
	51	static int xhci_plat_setup(struct usb_hcd *hcd)
	52	{
4ac8918f YS	53	int ret;
4ac8918f YS	54
526a240f YS	55	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) \|\|
526a240f YS	56	xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) {
4ac8918f YS	57	ret = xhci_rcar_init_quirk(hcd);
	58	if (ret)
	59	return ret;
	60	}
	61
3429e91a SAS	62	return xhci_gen_setup(hcd, xhci_plat_quirks);
	63	}
	64
94adcdce YS	65	static int xhci_plat_start(struct usb_hcd *hcd)
94adcdce YS	66	{
526a240f YS	67	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) \|\|
526a240f YS	68	xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
4ac8918f YS	69	xhci_rcar_start(hcd);
4ac8918f YS	70
94adcdce YS	71	return xhci_run(hcd);
	72	}
	73
4efb2f69 YS	74	#ifdef CONFIG_OF
	75	static const struct xhci_plat_priv xhci_plat_marvell_armada = {
	76	.type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
	77	};
	78
	79	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
	80	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
9bf9d9d6	81	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
4efb2f69 YS	82	};
4efb2f69 YS	83
526a240f YS	84	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
	85	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
	86	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
	87	};
	88
4efb2f69 YS	89	static const struct of_device_id usb_xhci_of_match[] = {
	90	{
	91	.compatible = "generic-xhci",
	92	}, {
	93	.compatible = "xhci-platform",
	94	}, {
	95	.compatible = "marvell,armada-375-xhci",
	96	.data = &xhci_plat_marvell_armada,
	97	}, {
	98	.compatible = "marvell,armada-380-xhci",
	99	.data = &xhci_plat_marvell_armada,
	100	}, {
	101	.compatible = "renesas,xhci-r8a7790",
	102	.data = &xhci_plat_renesas_rcar_gen2,
	103	}, {
	104	.compatible = "renesas,xhci-r8a7791",
	105	.data = &xhci_plat_renesas_rcar_gen2,
82487b71 YS	106	}, {
	107	.compatible = "renesas,xhci-r8a7793",
	108	.data = &xhci_plat_renesas_rcar_gen2,
526a240f YS	109	}, {
	110	.compatible = "renesas,xhci-r8a7795",
	111	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69 YS	112	}, {
	113	},
	114	};
	115	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	116	#endif
	117
3429e91a SAS	118	static int xhci_plat_probe(struct platform_device *pdev)
3429e91a SAS	119	{
20f6fdd0 PA	120	struct device_node *node = pdev->dev.of_node;
20f6fdd0 PA	121	struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
4efb2f69	122	const struct of_device_id *match;
3429e91a SAS	123	const struct hc_driver *driver;
	124	struct xhci_hcd *xhci;
	125	struct resource *res;
	126	struct usb_hcd *hcd;
4718c177	127	struct clk *clk;
3429e91a SAS	128	int ret;
	129	int irq;
	130
	131	if (usb_disabled())
	132	return -ENODEV;
	133
1885d9a3	134	driver = &xhci_plat_hc_driver;
3429e91a SAS	135
	136	irq = platform_get_irq(pdev, 0);
	137	if (irq < 0)
	138	return -ENODEV;
	139
0ebbe398 DD	140	/* Try to set 64-bit DMA first */
	141	if (WARN_ON(!pdev->dev.dma_mask))
	142	/* Platform did not initialize dma_mask */
	143	ret = dma_coerce_mask_and_coherent(&pdev->dev,
	144	DMA_BIT_MASK(64));
c10cf118	145	else
0ebbe398 DD	146	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	147
	148	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	149	if (ret) {
	150	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	151	if (ret)
	152	return ret;
	153	}
c10cf118	154
3429e91a SAS	155	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	156	if (!hcd)
	157	return -ENOMEM;
	158
e7020f19	159	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fd666348 HS	160	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	161	if (IS_ERR(hcd->regs)) {
	162	ret = PTR_ERR(hcd->regs);
3429e91a SAS	163	goto put_hcd;
	164	}
	165
e7020f19 VB	166	hcd->rsrc_start = res->start;
	167	hcd->rsrc_len = resource_size(res);
	168
4718c177 GC	169	/*
	170	* Not all platforms have a clk so it is not an error if the
	171	* clock does not exists.
	172	*/
	173	clk = devm_clk_get(&pdev->dev, NULL);
	174	if (!IS_ERR(clk)) {
	175	ret = clk_prepare_enable(clk);
	176	if (ret)
fd666348	177	goto put_hcd;
4718c177 GC	178	}
4718c177 GC	179
4efb2f69 YS	180	xhci = hcd_to_xhci(hcd);
	181	match = of_match_node(usb_xhci_of_match, node);
	182	if (match) {
	183	const struct xhci_plat_priv *priv_match = match->data;
	184	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	185
	186	/* Just copy data for now */
2ad294d5 GC	187	if (priv_match)
2ad294d5 GC	188	priv = priv_match;
4efb2f69 YS	189	}
	190
	191	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) {
1e7e4fb6 MR	192	ret = xhci_mvebu_mbus_init_quirk(pdev);
	193	if (ret)
	194	goto disable_clk;
	195	}
	196
3c9740a1	197	device_wakeup_enable(hcd->self.controller);
3429e91a	198
4718c177	199	xhci->clk = clk;
9fa733f2	200	xhci->main_hcd = hcd;
3429e91a SAS	201	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	202	dev_name(&pdev->dev), hcd);
	203	if (!xhci->shared_hcd) {
	204	ret = -ENOMEM;
4ac53087	205	goto disable_clk;
3429e91a SAS	206	}
3429e91a SAS	207
20f6fdd0 PA	208	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) \|\|
	209	(pdata && pdata->usb3_lpm_capable))
	210	xhci->quirks \|= XHCI_LPM_SUPPORT;
3429e91a	211
14aec589 ON	212	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
	213	xhci->shared_hcd->can_do_streams = 1;
	214
7b8ef22e MR	215	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	216	if (IS_ERR(hcd->usb_phy)) {
	217	ret = PTR_ERR(hcd->usb_phy);
	218	if (ret == -EPROBE_DEFER)
	219	goto put_usb3_hcd;
	220	hcd->usb_phy = NULL;
	221	} else {
	222	ret = usb_phy_init(hcd->usb_phy);
	223	if (ret)
	224	goto put_usb3_hcd;
	225	}
	226
4ac53087	227	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
3429e91a	228	if (ret)
7b8ef22e	229	goto disable_usb_phy;
3429e91a	230
4ac53087 RQ	231	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	232	if (ret)
	233	goto dealloc_usb2_hcd;
	234
3429e91a SAS	235	return 0;
3429e91a SAS	236
4ac53087 RQ	237
	238	dealloc_usb2_hcd:
	239	usb_remove_hcd(hcd);
	240
7b8ef22e MR	241	disable_usb_phy:
	242	usb_phy_shutdown(hcd->usb_phy);
	243
3429e91a SAS	244	put_usb3_hcd:
	245	usb_put_hcd(xhci->shared_hcd);
	246
4718c177 GC	247	disable_clk:
	248	if (!IS_ERR(clk))
	249	clk_disable_unprepare(clk);
	250
3429e91a SAS	251	put_hcd:
	252	usb_put_hcd(hcd);
	253
	254	return ret;
	255	}
	256
	257	static int xhci_plat_remove(struct platform_device *dev)
	258	{
	259	struct usb_hcd *hcd = platform_get_drvdata(dev);
	260	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
4718c177	261	struct clk *clk = xhci->clk;
3429e91a SAS	262
3429e91a SAS	263	usb_remove_hcd(xhci->shared_hcd);
7b8ef22e	264	usb_phy_shutdown(hcd->usb_phy);
3429e91a SAS	265
3429e91a SAS	266	usb_remove_hcd(hcd);
4ac53087 RQ	267	usb_put_hcd(xhci->shared_hcd);
4ac53087 RQ	268
4718c177 GC	269	if (!IS_ERR(clk))
4718c177 GC	270	clk_disable_unprepare(clk);
3429e91a	271	usb_put_hcd(hcd);
3429e91a SAS	272
	273	return 0;
	274	}
	275
274f6afa	276	#ifdef CONFIG_PM_SLEEP
57d04eb1 VS	277	static int xhci_plat_suspend(struct device *dev)
	278	{
	279	struct usb_hcd *hcd = dev_get_drvdata(dev);
	280	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	281
a1377e53 LB	282	/*
	283	* xhci_suspend() needs `do_wakeup` to know whether host is allowed
	284	* to do wakeup during suspend. Since xhci_plat_suspend is currently
	285	* only designed for system suspend, device_may_wakeup() is enough
	286	* to dertermine whether host is allowed to do wakeup. Need to
	287	* reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
	288	* also applies to runtime suspend.
	289	*/
	290	return xhci_suspend(xhci, device_may_wakeup(dev));
57d04eb1 VS	291	}
	292
	293	static int xhci_plat_resume(struct device *dev)
	294	{
	295	struct usb_hcd *hcd = dev_get_drvdata(dev);
	296	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	297
	298	return xhci_resume(xhci, 0);
	299	}
	300
	301	static const struct dev_pm_ops xhci_plat_pm_ops = {
	302	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	303	};
	304	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	305	#else
	306	#define DEV_PM_OPS NULL
	307	#endif /* CONFIG_PM */
	308
579085b5 DD	309	static const struct acpi_device_id usb_xhci_acpi_match[] = {
	310	/* XHCI-compliant USB Controller */
	311	{ "PNP0D10", },
	312	{ }
	313	};
	314	MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
	315
3429e91a SAS	316	static struct platform_driver usb_xhci_driver = {
	317	.probe = xhci_plat_probe,
	318	.remove = xhci_plat_remove,
	319	.driver = {
	320	.name = "xhci-hcd",
57d04eb1	321	.pm = DEV_PM_OPS,
1fe6c452	322	.of_match_table = of_match_ptr(usb_xhci_of_match),
579085b5	323	.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
3429e91a SAS	324	},
	325	};
	326	MODULE_ALIAS("platform:xhci-hcd");
	327
29e409f0	328	static int __init xhci_plat_init(void)
3429e91a	329	{
cd33a321	330	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
3429e91a SAS	331	return platform_driver_register(&usb_xhci_driver);
3429e91a SAS	332	}
29e409f0	333	module_init(xhci_plat_init);
3429e91a	334
29e409f0	335	static void __exit xhci_plat_exit(void)
3429e91a SAS	336	{
	337	platform_driver_unregister(&usb_xhci_driver);
	338	}
29e409f0 AB	339	module_exit(xhci_plat_exit);
	340
	341	MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
	342	MODULE_LICENSE("GPL");