[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/platform_device.h>
#include <linux/module.h>
#include <linux/slab.h>

#include "xhci.h"

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_BROKEN_MSI;
}

/* called during probe() after chip reset completes */
static int xhci_plat_setup(struct usb_hcd *hcd)
{
	return xhci_gen_setup(hcd, xhci_plat_quirks);
}

static const struct hc_driver xhci_plat_xhci_driver = {
	.description =		"xhci-hcd",
	.product_desc =		"xHCI Host Controller",
	.hcd_priv_size =	sizeof(struct xhci_hcd *),

	/*
	 * generic hardware linkage
	 */
	.irq =			xhci_irq,
	.flags =		HCD_MEMORY | HCD_USB3 | HCD_SHARED,

	/*
	 * basic lifecycle operations
	 */
	.reset =		xhci_plat_setup,
	.start =		xhci_run,
	.stop =			xhci_stop,
	.shutdown =		xhci_shutdown,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		xhci_urb_enqueue,
	.urb_dequeue =		xhci_urb_dequeue,
	.alloc_dev =		xhci_alloc_dev,
	.free_dev =		xhci_free_dev,
	.alloc_streams =	xhci_alloc_streams,
	.free_streams =		xhci_free_streams,
	.add_endpoint =		xhci_add_endpoint,
	.drop_endpoint =	xhci_drop_endpoint,
	.endpoint_reset =	xhci_endpoint_reset,
	.check_bandwidth =	xhci_check_bandwidth,
	.reset_bandwidth =	xhci_reset_bandwidth,
	.address_device =	xhci_address_device,
	.update_hub_device =	xhci_update_hub_device,
	.reset_device =		xhci_discover_or_reset_device,

	/*
	 * scheduling support
	 */
	.get_frame_number =	xhci_get_frame,

	/* Root hub support */
	.hub_control =		xhci_hub_control,
	.hub_status_data =	xhci_hub_status_data,
	.bus_suspend =		xhci_bus_suspend,
	.bus_resume =		xhci_bus_resume,
};

static int xhci_plat_probe(struct platform_device *pdev)
{
	const struct hc_driver	*driver;
	struct xhci_hcd		*xhci;
	struct resource         *res;
	struct usb_hcd		*hcd;
	int			ret;
	int			irq;

	if (usb_disabled())
		return -ENODEV;

	driver = &xhci_plat_xhci_driver;

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

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

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

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

	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
				driver->description)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		ret = -EBUSY;
		goto put_hcd;
	}

	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
	if (!hcd->regs) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		ret = -EFAULT;
		goto release_mem_region;
	}

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

	/* USB 2.0 roothub is stored in the platform_device now. */
	hcd = platform_get_drvdata(pdev);
	xhci = hcd_to_xhci(hcd);
	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
			dev_name(&pdev->dev), hcd);
	if (!xhci->shared_hcd) {
		ret = -ENOMEM;
		goto dealloc_usb2_hcd;
	}

	/*
	 * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
	 * is called by usb_add_hcd().
	 */
	*((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;

	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	if (ret)
		goto put_usb3_hcd;

	return 0;

put_usb3_hcd:
	usb_put_hcd(xhci->shared_hcd);

dealloc_usb2_hcd:
	usb_remove_hcd(hcd);

unmap_registers:
	iounmap(hcd->regs);

release_mem_region:
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

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);

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

	usb_remove_hcd(hcd);
	iounmap(hcd->regs);
	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	usb_put_hcd(hcd);
	kfree(xhci);

	return 0;
}

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

	return xhci_suspend(xhci);
}

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 struct platform_driver usb_xhci_driver = {
	.probe	= xhci_plat_probe,
	.remove	= xhci_plat_remove,
	.driver	= {
		.name = "xhci-hcd",
		.pm = DEV_PM_OPS,
	},
};
MODULE_ALIAS("platform:xhci-hcd");

int xhci_register_plat(void)
{
	return platform_driver_register(&usb_xhci_driver);
}

void xhci_unregister_plat(void)
{
	platform_driver_unregister(&usb_xhci_driver);
}
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
	14	#include <linux/platform_device.h>
	15	#include <linux/module.h>
	16	#include <linux/slab.h>
	17
	18	#include "xhci.h"
	19
	20	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
	21	{
	22	/*
	23	* As of now platform drivers don't provide MSI support so we ensure
	24	* here that the generic code does not try to make a pci_dev from our
	25	* dev struct in order to setup MSI
	26	*/
	27	xhci->quirks \|= XHCI_BROKEN_MSI;
	28	}
	29
	30	/* called during probe() after chip reset completes */
	31	static int xhci_plat_setup(struct usb_hcd *hcd)
	32	{
	33	return xhci_gen_setup(hcd, xhci_plat_quirks);
	34	}
	35
	36	static const struct hc_driver xhci_plat_xhci_driver = {
	37	.description = "xhci-hcd",
	38	.product_desc = "xHCI Host Controller",
	39	.hcd_priv_size = sizeof(struct xhci_hcd *),
	40
	41	/*
	42	* generic hardware linkage
	43	*/
	44	.irq = xhci_irq,
	45	.flags = HCD_MEMORY \| HCD_USB3 \| HCD_SHARED,
	46
	47	/*
	48	* basic lifecycle operations
	49	*/
	50	.reset = xhci_plat_setup,
	51	.start = xhci_run,
	52	.stop = xhci_stop,
	53	.shutdown = xhci_shutdown,
	54
	55	/*
	56	* managing i/o requests and associated device resources
	57	*/
	58	.urb_enqueue = xhci_urb_enqueue,
	59	.urb_dequeue = xhci_urb_dequeue,
	60	.alloc_dev = xhci_alloc_dev,
	61	.free_dev = xhci_free_dev,
	62	.alloc_streams = xhci_alloc_streams,
	63	.free_streams = xhci_free_streams,
	64	.add_endpoint = xhci_add_endpoint,
65	.drop_endpoint = xhci_drop_endpoint,
66	.endpoint_reset = xhci_endpoint_reset,
67	.check_bandwidth = xhci_check_bandwidth,
68	.reset_bandwidth = xhci_reset_bandwidth,
69	.address_device = xhci_address_device,
70	.update_hub_device = xhci_update_hub_device,
71	.reset_device = xhci_discover_or_reset_device,
72
73	/*
74	* scheduling support
75	*/
76	.get_frame_number = xhci_get_frame,
77
78	/* Root hub support */
79	.hub_control = xhci_hub_control,
80	.hub_status_data = xhci_hub_status_data,
81	.bus_suspend = xhci_bus_suspend,
82	.bus_resume = xhci_bus_resume,
83	};
84
85	static int xhci_plat_probe(struct platform_device *pdev)
86	{
87	const struct hc_driver *driver;
88	struct xhci_hcd *xhci;
89	struct resource *res;
90	struct usb_hcd *hcd;
91	int ret;
92	int irq;
93
94	if (usb_disabled())
95	return -ENODEV;
96
97	driver = &xhci_plat_xhci_driver;
98
99	irq = platform_get_irq(pdev, 0);
100	if (irq < 0)
101	return -ENODEV;
102
103	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
104	if (!res)
105	return -ENODEV;
106
107	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
108	if (!hcd)
109	return -ENOMEM;
110
111	hcd->rsrc_start = res->start;
112	hcd->rsrc_len = resource_size(res);
113
114	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
115	driver->description)) {
116	dev_dbg(&pdev->dev, "controller already in use\n");
117	ret = -EBUSY;
118	goto put_hcd;
119	}
120
319acdfc	121	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
3429e91a SAS	122	if (!hcd->regs) {
	123	dev_dbg(&pdev->dev, "error mapping memory\n");
	124	ret = -EFAULT;
	125	goto release_mem_region;
	126	}
	127
	128	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	129	if (ret)
	130	goto unmap_registers;
	131
	132	/* USB 2.0 roothub is stored in the platform_device now. */
477527ba	133	hcd = platform_get_drvdata(pdev);
3429e91a SAS	134	xhci = hcd_to_xhci(hcd);
	135	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	136	dev_name(&pdev->dev), hcd);
	137	if (!xhci->shared_hcd) {
	138	ret = -ENOMEM;
	139	goto dealloc_usb2_hcd;
	140	}
	141
	142	/*
	143	* Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
	144	* is called by usb_add_hcd().
	145	*/
	146	((struct xhci_hcd *) xhci->shared_hcd->hcd_priv) = xhci;
	147
	148	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	149	if (ret)
	150	goto put_usb3_hcd;
	151
	152	return 0;
	153
	154	put_usb3_hcd:
	155	usb_put_hcd(xhci->shared_hcd);
	156
	157	dealloc_usb2_hcd:
	158	usb_remove_hcd(hcd);
	159
	160	unmap_registers:
	161	iounmap(hcd->regs);
	162
	163	release_mem_region:
	164	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	165
	166	put_hcd:
	167	usb_put_hcd(hcd);
	168
	169	return ret;
	170	}
	171
	172	static int xhci_plat_remove(struct platform_device *dev)
	173	{
	174	struct usb_hcd *hcd = platform_get_drvdata(dev);
	175	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	176
	177	usb_remove_hcd(xhci->shared_hcd);
	178	usb_put_hcd(xhci->shared_hcd);
	179
	180	usb_remove_hcd(hcd);
	181	iounmap(hcd->regs);
5388a3a5	182	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
3429e91a SAS	183	usb_put_hcd(hcd);
	184	kfree(xhci);
	185
	186	return 0;
	187	}
	188
57d04eb1 VS	189	#ifdef CONFIG_PM
	190	static int xhci_plat_suspend(struct device *dev)
	191	{
	192	struct usb_hcd *hcd = dev_get_drvdata(dev);
	193	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	194
	195	return xhci_suspend(xhci);
	196	}
	197
	198	static int xhci_plat_resume(struct device *dev)
	199	{
	200	struct usb_hcd *hcd = dev_get_drvdata(dev);
	201	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	202
	203	return xhci_resume(xhci, 0);
	204	}
	205
	206	static const struct dev_pm_ops xhci_plat_pm_ops = {
	207	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	208	};
	209	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	210	#else
	211	#define DEV_PM_OPS NULL
	212	#endif /* CONFIG_PM */
	213
3429e91a SAS	214	static struct platform_driver usb_xhci_driver = {
	215	.probe = xhci_plat_probe,
	216	.remove = xhci_plat_remove,
	217	.driver = {
	218	.name = "xhci-hcd",
57d04eb1	219	.pm = DEV_PM_OPS,
3429e91a SAS	220	},
	221	};
	222	MODULE_ALIAS("platform:xhci-hcd");
	223
	224	int xhci_register_plat(void)
	225	{
	226	return platform_driver_register(&usb_xhci_driver);
	227	}
	228
	229	void xhci_unregister_plat(void)
	230	{
	231	platform_driver_unregister(&usb_xhci_driver);
	232	}