[linux-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 <linux/of.h>
#include <linux/dma-mapping.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_PLAT;
}

/* 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;

	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		return ret;
	if (!pdev->dev.dma_mask)
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	else
		dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));

	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 */

#ifdef CONFIG_OF
static const struct of_device_id usb_xhci_of_match[] = {
	{ .compatible = "xhci-platform" },
	{ },
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif

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),
	},
};
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>
1fe6c452	17	#include <linux/of.h>
c10cf118	18	#include <linux/dma-mapping.h>
3429e91a SAS	19
	20	#include "xhci.h"
	21
	22	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
	23	{
	24	/*
	25	* As of now platform drivers don't provide MSI support so we ensure
	26	* here that the generic code does not try to make a pci_dev from our
	27	* dev struct in order to setup MSI
	28	*/
52fb6125	29	xhci->quirks \|= XHCI_PLAT;
3429e91a SAS	30	}
	31
	32	/* called during probe() after chip reset completes */
	33	static int xhci_plat_setup(struct usb_hcd *hcd)
	34	{
	35	return xhci_gen_setup(hcd, xhci_plat_quirks);
	36	}
	37
	38	static const struct hc_driver xhci_plat_xhci_driver = {
	39	.description = "xhci-hcd",
	40	.product_desc = "xHCI Host Controller",
	41	.hcd_priv_size = sizeof(struct xhci_hcd *),
	42
	43	/*
	44	* generic hardware linkage
	45	*/
	46	.irq = xhci_irq,
	47	.flags = HCD_MEMORY \| HCD_USB3 \| HCD_SHARED,
	48
	49	/*
	50	* basic lifecycle operations
	51	*/
	52	.reset = xhci_plat_setup,
	53	.start = xhci_run,
	54	.stop = xhci_stop,
	55	.shutdown = xhci_shutdown,
	56
	57	/*
	58	* managing i/o requests and associated device resources
	59	*/
	60	.urb_enqueue = xhci_urb_enqueue,
	61	.urb_dequeue = xhci_urb_dequeue,
	62	.alloc_dev = xhci_alloc_dev,
	63	.free_dev = xhci_free_dev,
	64	.alloc_streams = xhci_alloc_streams,
	65	.free_streams = xhci_free_streams,
	66	.add_endpoint = xhci_add_endpoint,
	67	.drop_endpoint = xhci_drop_endpoint,
	68	.endpoint_reset = xhci_endpoint_reset,
	69	.check_bandwidth = xhci_check_bandwidth,
	70	.reset_bandwidth = xhci_reset_bandwidth,
	71	.address_device = xhci_address_device,
	72	.update_hub_device = xhci_update_hub_device,
	73	.reset_device = xhci_discover_or_reset_device,
	74
	75	/*
	76	* scheduling support
	77	*/
	78	.get_frame_number = xhci_get_frame,
	79
	80	/* Root hub support */
	81	.hub_control = xhci_hub_control,
	82	.hub_status_data = xhci_hub_status_data,
	83	.bus_suspend = xhci_bus_suspend,
	84	.bus_resume = xhci_bus_resume,
	85	};
	86
	87	static int xhci_plat_probe(struct platform_device *pdev)
	88	{
	89	const struct hc_driver *driver;
	90	struct xhci_hcd *xhci;
	91	struct resource *res;
	92	struct usb_hcd *hcd;
	93	int ret;
94	int irq;
95
96	if (usb_disabled())
97	return -ENODEV;
98
99	driver = &xhci_plat_xhci_driver;
100
101	irq = platform_get_irq(pdev, 0);
102	if (irq < 0)
103	return -ENODEV;
104
105	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106	if (!res)
107	return -ENODEV;
108
c10cf118 XR	109	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
	110	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
	111	if (ret)
	112	return ret;
	113	if (!pdev->dev.dma_mask)
	114	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	115	else
	116	dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
	117
3429e91a SAS	118	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	119	if (!hcd)
	120	return -ENOMEM;
	121
	122	hcd->rsrc_start = res->start;
	123	hcd->rsrc_len = resource_size(res);
	124
	125	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	126	driver->description)) {
	127	dev_dbg(&pdev->dev, "controller already in use\n");
	128	ret = -EBUSY;
	129	goto put_hcd;
	130	}
	131
319acdfc	132	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
3429e91a SAS	133	if (!hcd->regs) {
	134	dev_dbg(&pdev->dev, "error mapping memory\n");
	135	ret = -EFAULT;
	136	goto release_mem_region;
	137	}
	138
	139	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	140	if (ret)
	141	goto unmap_registers;
	142
	143	/* USB 2.0 roothub is stored in the platform_device now. */
477527ba	144	hcd = platform_get_drvdata(pdev);
3429e91a SAS	145	xhci = hcd_to_xhci(hcd);
	146	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	147	dev_name(&pdev->dev), hcd);
	148	if (!xhci->shared_hcd) {
	149	ret = -ENOMEM;
	150	goto dealloc_usb2_hcd;
	151	}
	152
	153	/*
	154	* Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
	155	* is called by usb_add_hcd().
	156	*/
	157	((struct xhci_hcd *) xhci->shared_hcd->hcd_priv) = xhci;
	158
	159	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
	160	if (ret)
	161	goto put_usb3_hcd;
	162
	163	return 0;
	164
	165	put_usb3_hcd:
	166	usb_put_hcd(xhci->shared_hcd);
	167
	168	dealloc_usb2_hcd:
	169	usb_remove_hcd(hcd);
	170
	171	unmap_registers:
	172	iounmap(hcd->regs);
	173
	174	release_mem_region:
	175	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	176
	177	put_hcd:
	178	usb_put_hcd(hcd);
	179
	180	return ret;
	181	}
	182
	183	static int xhci_plat_remove(struct platform_device *dev)
	184	{
	185	struct usb_hcd *hcd = platform_get_drvdata(dev);
	186	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	187
	188	usb_remove_hcd(xhci->shared_hcd);
	189	usb_put_hcd(xhci->shared_hcd);
	190
	191	usb_remove_hcd(hcd);
	192	iounmap(hcd->regs);
5388a3a5	193	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
3429e91a SAS	194	usb_put_hcd(hcd);
	195	kfree(xhci);
	196
	197	return 0;
	198	}
	199
57d04eb1 VS	200	#ifdef CONFIG_PM
	201	static int xhci_plat_suspend(struct device *dev)
	202	{
	203	struct usb_hcd *hcd = dev_get_drvdata(dev);
	204	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	205
	206	return xhci_suspend(xhci);
	207	}
	208
	209	static int xhci_plat_resume(struct device *dev)
	210	{
	211	struct usb_hcd *hcd = dev_get_drvdata(dev);
	212	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	213
	214	return xhci_resume(xhci, 0);
	215	}
	216
	217	static const struct dev_pm_ops xhci_plat_pm_ops = {
	218	SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
	219	};
	220	#define DEV_PM_OPS (&xhci_plat_pm_ops)
	221	#else
	222	#define DEV_PM_OPS NULL
	223	#endif /* CONFIG_PM */
	224
1fe6c452 AC	225	#ifdef CONFIG_OF
	226	static const struct of_device_id usb_xhci_of_match[] = {
	227	{ .compatible = "xhci-platform" },
	228	{ },
	229	};
	230	MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
	231	#endif
	232
3429e91a SAS	233	static struct platform_driver usb_xhci_driver = {
	234	.probe = xhci_plat_probe,
	235	.remove = xhci_plat_remove,
	236	.driver = {
	237	.name = "xhci-hcd",
57d04eb1	238	.pm = DEV_PM_OPS,
1fe6c452	239	.of_match_table = of_match_ptr(usb_xhci_of_match),
3429e91a SAS	240	},
	241	};
	242	MODULE_ALIAS("platform:xhci-hcd");
	243
	244	int xhci_register_plat(void)
	245	{
	246	return platform_driver_register(&usb_xhci_driver);
	247	}
	248
	249	void xhci_unregister_plat(void)
	250	{
	251	platform_driver_unregister(&usb_xhci_driver);
	252	}