[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/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)
{
	struct usb_hcd *hcd = xhci_to_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;

	/*
	 * On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
	 * to 1. However, these SoCs don't support 64-bit address memory
	 * pointers. So, this driver clears the AC64 bit of xhci->hcc_params
	 * to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
	 * xhci_gen_setup().
	 */
	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
	    xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
		xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
}

/* 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,
	}, {
		.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;
	}

	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)
3429e91a SAS	41	{
5ad3b03e YS	42	struct usb_hcd *hcd = xhci_to_hcd(xhci);
5ad3b03e YS	43
3429e91a SAS	44	/*
	45	* As of now platform drivers don't provide MSI support so we ensure
	46	* here that the generic code does not try to make a pci_dev from our
	47	* dev struct in order to setup MSI
	48	*/
52fb6125	49	xhci->quirks \|= XHCI_PLAT;
5ad3b03e YS	50
	51	/*
	52	* On R-Car Gen2 and Gen3, the AC64 bit (bit 0) of HCCPARAMS1 is set
	53	* to 1. However, these SoCs don't support 64-bit address memory
	54	* pointers. So, this driver clears the AC64 bit of xhci->hcc_params
	55	* to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
	56	* xhci_gen_setup().
	57	*/
	58	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) \|\|
	59	xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
	60	xhci->quirks \|= XHCI_NO_64BIT_SUPPORT;
3429e91a SAS	61	}
	62
	63	/* called during probe() after chip reset completes */
	64	static int xhci_plat_setup(struct usb_hcd *hcd)
	65	{
4ac8918f YS	66	int ret;
4ac8918f YS	67
526a240f YS	68	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) \|\|
526a240f YS	69	xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) {
4ac8918f YS	70	ret = xhci_rcar_init_quirk(hcd);
	71	if (ret)
	72	return ret;
	73	}
	74
3429e91a SAS	75	return xhci_gen_setup(hcd, xhci_plat_quirks);
	76	}
	77
94adcdce YS	78	static int xhci_plat_start(struct usb_hcd *hcd)
94adcdce YS	79	{
526a240f YS	80	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) \|\|
526a240f YS	81	xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
4ac8918f YS	82	xhci_rcar_start(hcd);
4ac8918f YS	83
94adcdce YS	84	return xhci_run(hcd);
	85	}
	86
4efb2f69 YS	87	#ifdef CONFIG_OF
	88	static const struct xhci_plat_priv xhci_plat_marvell_armada = {
	89	.type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
	90	};
	91
	92	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
	93	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
9bf9d9d6	94	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
4efb2f69 YS	95	};
4efb2f69 YS	96
526a240f YS	97	static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
	98	.type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
	99	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
	100	};
	101
4efb2f69 YS	102	static const struct of_device_id usb_xhci_of_match[] = {
	103	{
	104	.compatible = "generic-xhci",
	105	}, {
	106	.compatible = "xhci-platform",
	107	}, {
	108	.compatible = "marvell,armada-375-xhci",
	109	.data = &xhci_plat_marvell_armada,
	110	}, {
	111	.compatible = "marvell,armada-380-xhci",
	112	.data = &xhci_plat_marvell_armada,
	113	}, {
	114	.compatible = "renesas,xhci-r8a7790",
	115	.data = &xhci_plat_renesas_rcar_gen2,
	116	}, {
	117	.compatible = "renesas,xhci-r8a7791",
	118	.data = &xhci_plat_renesas_rcar_gen2,
82487b71 YS	119	}, {
	120	.compatible = "renesas,xhci-r8a7793",
	121	.data = &xhci_plat_renesas_rcar_gen2,
526a240f YS	122	}, {
	123	.compatible = "renesas,xhci-r8a7795",
	124	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	125	}, {
f1bbdc3b SH	126	.compatible = "renesas,rcar-gen2-xhci",
	127	.data = &xhci_plat_renesas_rcar_gen2,
	128	}, {
	129	.compatible = "renesas,rcar-gen3-xhci",
	130	.data = &xhci_plat_renesas_rcar_gen3,
4efb2f69	131	},
ff075d67	132	{},
4efb2f69 YS	133	};
	134	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	135	#endif
	136
3429e91a SAS	137	static int xhci_plat_probe(struct platform_device *pdev)
3429e91a SAS	138	{
20f6fdd0 PA	139	struct device_node *node = pdev->dev.of_node;
20f6fdd0 PA	140	struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
4efb2f69	141	const struct of_device_id *match;
3429e91a SAS	142	const struct hc_driver *driver;
	143	struct xhci_hcd *xhci;
	144	struct resource *res;
	145	struct usb_hcd *hcd;
4718c177	146	struct clk *clk;
3429e91a SAS	147	int ret;
	148	int irq;
	149
	150	if (usb_disabled())
	151	return -ENODEV;
	152
1885d9a3	153	driver = &xhci_plat_hc_driver;
3429e91a SAS	154
	155	irq = platform_get_irq(pdev, 0);
	156	if (irq < 0)
	157	return -ENODEV;
	158
0ebbe398 DD	159	/* Try to set 64-bit DMA first */
	160	if (WARN_ON(!pdev->dev.dma_mask))
	161	/* Platform did not initialize dma_mask */
	162	ret = dma_coerce_mask_and_coherent(&pdev->dev,
	163	DMA_BIT_MASK(64));
c10cf118	164	else
0ebbe398 DD	165	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	166
	167	/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
	168	if (ret) {
	169	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	170	if (ret)
	171	return ret;
	172	}
c10cf118	173
3429e91a SAS	174	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	175	if (!hcd)
	176	return -ENOMEM;
	177
e7020f19	178	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
fd666348 HS	179	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	180	if (IS_ERR(hcd->regs)) {
	181	ret = PTR_ERR(hcd->regs);
3429e91a SAS	182	goto put_hcd;
	183	}
	184
e7020f19 VB	185	hcd->rsrc_start = res->start;
	186	hcd->rsrc_len = resource_size(res);
	187
4718c177 GC	188	/*
	189	* Not all platforms have a clk so it is not an error if the
	190	* clock does not exists.
	191	*/
	192	clk = devm_clk_get(&pdev->dev, NULL);
	193	if (!IS_ERR(clk)) {
	194	ret = clk_prepare_enable(clk);
	195	if (ret)
fd666348	196	goto put_hcd;
4718c177 GC	197	}
4718c177 GC	198
4efb2f69 YS	199	xhci = hcd_to_xhci(hcd);
	200	match = of_match_node(usb_xhci_of_match, node);
	201	if (match) {
	202	const struct xhci_plat_priv *priv_match = match->data;
	203	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
	204
	205	/* Just copy data for now */
2ad294d5 GC	206	if (priv_match)
2ad294d5 GC	207	priv = priv_match;
4efb2f69 YS	208	}
	209
	210	if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) {
1e7e4fb6 MR	211	ret = xhci_mvebu_mbus_init_quirk(pdev);
	212	if (ret)
	213	goto disable_clk;
	214	}
	215
3c9740a1	216	device_wakeup_enable(hcd->self.controller);
3429e91a	217
4718c177	218	xhci->clk = clk;
9fa733f2	219	xhci->main_hcd = hcd;
3429e91a SAS	220	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	221	dev_name(&pdev->dev), hcd);
	222	if (!xhci->shared_hcd) {
	223	ret = -ENOMEM;
4ac53087	224	goto disable_clk;
3429e91a SAS	225	}
3429e91a SAS	226
20f6fdd0 PA	227	if ((node && of_property_read_bool(node, "usb3-lpm-capable")) \|\|
	228	(pdata && pdata->usb3_lpm_capable))
	229	xhci->quirks \|= XHCI_LPM_SUPPORT;
3429e91a	230
14aec589 ON	231	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
	232	xhci->shared_hcd->can_do_streams = 1;
	233
7b8ef22e MR	234	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
	235	if (IS_ERR(hcd->usb_phy)) {
	236	ret = PTR_ERR(hcd->usb_phy);
	237	if (ret == -EPROBE_DEFER)
	238	goto put_usb3_hcd;
	239	hcd->usb_phy = NULL;
	240	} else {
	241	ret = usb_phy_init(hcd->usb_phy);
	242	if (ret)
	243	goto put_usb3_hcd;
	244	}
	245
4ac53087	246	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
3429e91a	247	if (ret)
7b8ef22e	248	goto disable_usb_phy;
3429e91a	249
4ac53087 RQ	250	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	251	if (ret)
	252	goto dealloc_usb2_hcd;
	253
3429e91a SAS	254	return 0;
3429e91a SAS	255
4ac53087 RQ	256
	257	dealloc_usb2_hcd:
	258	usb_remove_hcd(hcd);
	259
7b8ef22e MR	260	disable_usb_phy:
	261	usb_phy_shutdown(hcd->usb_phy);
	262
3429e91a SAS	263	put_usb3_hcd:
	264	usb_put_hcd(xhci->shared_hcd);
	265
4718c177 GC	266	disable_clk:
	267	if (!IS_ERR(clk))
	268	clk_disable_unprepare(clk);
	269
3429e91a SAS	270	put_hcd:
	271	usb_put_hcd(hcd);
	272
	273	return ret;
	274	}
	275
	276	static int xhci_plat_remove(struct platform_device *dev)
	277	{
	278	struct usb_hcd *hcd = platform_get_drvdata(dev);
	279	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
4718c177	280	struct clk *clk = xhci->clk;
3429e91a SAS	281
3429e91a SAS	282	usb_remove_hcd(xhci->shared_hcd);
7b8ef22e	283	usb_phy_shutdown(hcd->usb_phy);
3429e91a SAS	284
3429e91a SAS	285	usb_remove_hcd(hcd);
4ac53087 RQ	286	usb_put_hcd(xhci->shared_hcd);
4ac53087 RQ	287
4718c177 GC	288	if (!IS_ERR(clk))
4718c177 GC	289	clk_disable_unprepare(clk);
3429e91a	290	usb_put_hcd(hcd);
3429e91a SAS	291
	292	return 0;
	293	}
	294
274f6afa	295	#ifdef CONFIG_PM_SLEEP
57d04eb1 VS	296	static int xhci_plat_suspend(struct device *dev)
	297	{
	298	struct usb_hcd *hcd = dev_get_drvdata(dev);
	299	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	300
a1377e53 LB	301	/*
	302	* xhci_suspend() needs `do_wakeup` to know whether host is allowed
	303	* to do wakeup during suspend. Since xhci_plat_suspend is currently
	304	* only designed for system suspend, device_may_wakeup() is enough
	305	* to dertermine whether host is allowed to do wakeup. Need to
	306	* reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
	307	* also applies to runtime suspend.
	308	*/
	309	return xhci_suspend(xhci, device_may_wakeup(dev));
57d04eb1 VS	310	}
	311
	312	static int xhci_plat_resume(struct device *dev)
	313	{
	314	struct usb_hcd *hcd = dev_get_drvdata(dev);
	315	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	316
	317	return xhci_resume(xhci, 0);
	318	}
	319
	320	static const struct dev_pm_ops xhci_plat_pm_ops = {
	321	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	322	};
	323	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	324	#else
	325	#define DEV_PM_OPS NULL
	326	#endif /* CONFIG_PM */
	327
579085b5 DD	328	static const struct acpi_device_id usb_xhci_acpi_match[] = {
	329	/* XHCI-compliant USB Controller */
	330	{ "PNP0D10", },
	331	{ }
	332	};
	333	MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
	334
3429e91a SAS	335	static struct platform_driver usb_xhci_driver = {
	336	.probe = xhci_plat_probe,
	337	.remove = xhci_plat_remove,
	338	.driver = {
	339	.name = "xhci-hcd",
57d04eb1	340	.pm = DEV_PM_OPS,
1fe6c452	341	.of_match_table = of_match_ptr(usb_xhci_of_match),
579085b5	342	.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
3429e91a SAS	343	},
	344	};
	345	MODULE_ALIAS("platform:xhci-hcd");
	346
29e409f0	347	static int __init xhci_plat_init(void)
3429e91a	348	{
cd33a321	349	xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
3429e91a SAS	350	return platform_driver_register(&usb_xhci_driver);
3429e91a SAS	351	}
29e409f0	352	module_init(xhci_plat_init);
3429e91a	353
29e409f0	354	static void __exit xhci_plat_exit(void)
3429e91a SAS	355	{
	356	platform_driver_unregister(&usb_xhci_driver);
	357	}
29e409f0 AB	358	module_exit(xhci_plat_exit);
	359
	360	MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
	361	MODULE_LICENSE("GPL");