[GitHub/mt8127/android_kernel_alcatel_ttab.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/dma-mapping.h>

#include "xhci.h"

#ifdef CONFIG_MTK_XHCI
#include <linux/xhci/xhci-mtk.h>
#include <linux/of.h>
#endif

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;
	//CC: MTK host controller gives a spurious successful event after a
	//    short transfer. Ignore it.
	xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
	xhci->quirks |= XHCI_LPM_SUPPORT;
}

/* 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,
};

#if defined(CONFIG_MTK_LM_MODE)
#define XHCI_DMA_BIT_MASK DMA_BIT_MASK(64)
#else
#define XHCI_DMA_BIT_MASK DMA_BIT_MASK(32)
#endif

static u64 xhci_dma_mask = XHCI_DMA_BIT_MASK;

static void xhci_hcd_release (struct device *dev)
{
    printk(KERN_INFO "dev = 0x%p\n", dev);
}

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;

#ifdef CONFIG_MTK_XHCI  /* device tree support */
	irq = platform_get_irq_byname(pdev, XHCI_DRIVER_NAME);
	printk("%s(%d): %d\n", __func__, __LINE__, irq);
	if(irq < 0)
		return -ENODEV;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, XHCI_BASE_REGS_ADDR_RES_NAME);
	if (!res)
		return -ENODEV;

	pdev->dev.coherent_dma_mask = XHCI_DMA_BIT_MASK;
	pdev->dev.dma_mask = &xhci_dma_mask;
	pdev->dev.release = xhci_hcd_release;
#else
	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return -ENODEV;

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

	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;
	}

	printk("%s(%d): logic 0x%p, phys 0x%p\n", __func__, __LINE__,
		(void *)(unsigned long)res->start, hcd->regs);

	#ifdef CONFIG_MTK_XHCI
	ret = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_TRIGGER_LOW);
	#else
	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
	#endif

	if (ret)
		goto unmap_registers;

	/* USB 2.0 roothub is stored in the platform_device now. */
	hcd = dev_get_drvdata(&pdev->dev);
	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;

	#ifdef CONFIG_MTK_XHCI
    ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED | IRQF_TRIGGER_LOW);
    #else
	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
    #endif
	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);

	xhci->xhc_state |= XHCI_STATE_REMOVING;

	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);
	#ifdef CONFIG_MTK_XHCI	
	mtk_xhci_reset(xhci);
	#endif
	kfree(xhci);

	return 0;
}

#ifdef CONFIG_MTK_XHCI
static const struct of_device_id mtk_xhci_of_match[] = {
	{
		.compatible = "mediatek,USB3_XHCI",
	},
	{ },
};
#endif

static struct platform_driver usb_xhci_driver = {
	.probe	= xhci_plat_probe,
	.remove	= xhci_plat_remove,
	.driver	= {
		.name = "xhci-hcd",
#ifdef CONFIG_MTK_XHCI
        .of_match_table = of_match_ptr(mtk_xhci_of_match),
#endif
	},
};
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>
6fa3eb70	17	#include <linux/dma-mapping.h>
3429e91a SAS	18
	19	#include "xhci.h"
	20
6fa3eb70 S	21	#ifdef CONFIG_MTK_XHCI
	22	#include <linux/xhci/xhci-mtk.h>
	23	#include <linux/of.h>
	24	#endif
	25
3429e91a SAS	26	static void xhci_plat_quirks(struct device dev, struct xhci_hcd xhci)
	27	{
	28	/*
	29	* As of now platform drivers don't provide MSI support so we ensure
	30	* here that the generic code does not try to make a pci_dev from our
	31	* dev struct in order to setup MSI
	32	*/
a6025b95	33	xhci->quirks \|= XHCI_PLAT;
6fa3eb70 S	34	//CC: MTK host controller gives a spurious successful event after a
	35	// short transfer. Ignore it.
	36	xhci->quirks \|= XHCI_SPURIOUS_SUCCESS;
	37	xhci->quirks \|= XHCI_LPM_SUPPORT;
3429e91a SAS	38	}
	39
	40	/* called during probe() after chip reset completes */
	41	static int xhci_plat_setup(struct usb_hcd *hcd)
	42	{
	43	return xhci_gen_setup(hcd, xhci_plat_quirks);
	44	}
	45
	46	static const struct hc_driver xhci_plat_xhci_driver = {
	47	.description = "xhci-hcd",
	48	.product_desc = "xHCI Host Controller",
	49	.hcd_priv_size = sizeof(struct xhci_hcd *),
	50
	51	/*
	52	* generic hardware linkage
	53	*/
	54	.irq = xhci_irq,
	55	.flags = HCD_MEMORY \| HCD_USB3 \| HCD_SHARED,
	56
	57	/*
	58	* basic lifecycle operations
	59	*/
	60	.reset = xhci_plat_setup,
	61	.start = xhci_run,
	62	.stop = xhci_stop,
	63	.shutdown = xhci_shutdown,
	64
	65	/*
	66	* managing i/o requests and associated device resources
	67	*/
	68	.urb_enqueue = xhci_urb_enqueue,
	69	.urb_dequeue = xhci_urb_dequeue,
	70	.alloc_dev = xhci_alloc_dev,
	71	.free_dev = xhci_free_dev,
	72	.alloc_streams = xhci_alloc_streams,
	73	.free_streams = xhci_free_streams,
	74	.add_endpoint = xhci_add_endpoint,
	75	.drop_endpoint = xhci_drop_endpoint,
	76	.endpoint_reset = xhci_endpoint_reset,
	77	.check_bandwidth = xhci_check_bandwidth,
	78	.reset_bandwidth = xhci_reset_bandwidth,
	79	.address_device = xhci_address_device,
	80	.update_hub_device = xhci_update_hub_device,
	81	.reset_device = xhci_discover_or_reset_device,
	82
	83	/*
	84	* scheduling support
	85	*/
	86	.get_frame_number = xhci_get_frame,
	87
	88	/* Root hub support */
	89	.hub_control = xhci_hub_control,
	90	.hub_status_data = xhci_hub_status_data,
	91	.bus_suspend = xhci_bus_suspend,
	92	.bus_resume = xhci_bus_resume,
	93	};
	94
6fa3eb70 S	95	#if defined(CONFIG_MTK_LM_MODE)
	96	#define XHCI_DMA_BIT_MASK DMA_BIT_MASK(64)
	97	#else
	98	#define XHCI_DMA_BIT_MASK DMA_BIT_MASK(32)
	99	#endif
	100
	101	static u64 xhci_dma_mask = XHCI_DMA_BIT_MASK;
	102
	103	static void xhci_hcd_release (struct device *dev)
	104	{
	105	printk(KERN_INFO "dev = 0x%p\n", dev);
	106	}
	107
3429e91a SAS	108	static int xhci_plat_probe(struct platform_device *pdev)
	109	{
	110	const struct hc_driver *driver;
	111	struct xhci_hcd *xhci;
	112	struct resource *res;
	113	struct usb_hcd *hcd;
	114	int ret;
	115	int irq;
	116
	117	if (usb_disabled())
	118	return -ENODEV;
	119
	120	driver = &xhci_plat_xhci_driver;
	121
6fa3eb70 S	122	#ifdef CONFIG_MTK_XHCI /* device tree support */
	123	irq = platform_get_irq_byname(pdev, XHCI_DRIVER_NAME);
	124	printk("%s(%d): %d\n", __func__, __LINE__, irq);
	125	if(irq < 0)
	126	return -ENODEV;
	127
	128	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, XHCI_BASE_REGS_ADDR_RES_NAME);
	129	if (!res)
	130	return -ENODEV;
	131
	132	pdev->dev.coherent_dma_mask = XHCI_DMA_BIT_MASK;
	133	pdev->dev.dma_mask = &xhci_dma_mask;
	134	pdev->dev.release = xhci_hcd_release;
	135	#else
3429e91a SAS	136	irq = platform_get_irq(pdev, 0);
	137	if (irq < 0)
	138	return -ENODEV;
	139
	140	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	141	if (!res)
	142	return -ENODEV;
6fa3eb70	143	#endif
3429e91a SAS	144
	145	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	146	if (!hcd)
	147	return -ENOMEM;
	148
	149	hcd->rsrc_start = res->start;
	150	hcd->rsrc_len = resource_size(res);
	151
	152	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
	153	driver->description)) {
	154	dev_dbg(&pdev->dev, "controller already in use\n");
	155	ret = -EBUSY;
	156	goto put_hcd;
	157	}
	158
319acdfc	159	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
3429e91a SAS	160	if (!hcd->regs) {
	161	dev_dbg(&pdev->dev, "error mapping memory\n");
	162	ret = -EFAULT;
	163	goto release_mem_region;
	164	}
	165
6fa3eb70 S	166	printk("%s(%d): logic 0x%p, phys 0x%p\n", __func__, __LINE__,
	167	(void *)(unsigned long)res->start, hcd->regs);
	168
	169	#ifdef CONFIG_MTK_XHCI
	170	ret = usb_add_hcd(hcd, irq, IRQF_SHARED \| IRQF_TRIGGER_LOW);
	171	#else
3429e91a	172	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
6fa3eb70 S	173	#endif
6fa3eb70 S	174
3429e91a SAS	175	if (ret)
	176	goto unmap_registers;
	177
	178	/* USB 2.0 roothub is stored in the platform_device now. */
	179	hcd = dev_get_drvdata(&pdev->dev);
	180	xhci = hcd_to_xhci(hcd);
	181	xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
	182	dev_name(&pdev->dev), hcd);
	183	if (!xhci->shared_hcd) {
	184	ret = -ENOMEM;
	185	goto dealloc_usb2_hcd;
	186	}
	187
	188	/*
	189	* Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
	190	* is called by usb_add_hcd().
	191	*/
	192	((struct xhci_hcd *) xhci->shared_hcd->hcd_priv) = xhci;
	193
6fa3eb70 S	194	#ifdef CONFIG_MTK_XHCI
	195	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED \| IRQF_TRIGGER_LOW);
	196	#else
3429e91a	197	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
6fa3eb70	198	#endif
3429e91a SAS	199	if (ret)
	200	goto put_usb3_hcd;
	201
	202	return 0;
	203
	204	put_usb3_hcd:
	205	usb_put_hcd(xhci->shared_hcd);
	206
	207	dealloc_usb2_hcd:
	208	usb_remove_hcd(hcd);
	209
	210	unmap_registers:
	211	iounmap(hcd->regs);
	212
	213	release_mem_region:
	214	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
	215
	216	put_hcd:
	217	usb_put_hcd(hcd);
	218
	219	return ret;
	220	}
	221
	222	static int xhci_plat_remove(struct platform_device *dev)
	223	{
	224	struct usb_hcd *hcd = platform_get_drvdata(dev);
	225	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	226
a3fdfc64 GR	227	xhci->xhc_state \|= XHCI_STATE_REMOVING;
a3fdfc64 GR	228
3429e91a SAS	229	usb_remove_hcd(xhci->shared_hcd);
	230	usb_put_hcd(xhci->shared_hcd);
	231
	232	usb_remove_hcd(hcd);
	233	iounmap(hcd->regs);
a5ea8ca0	234	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
3429e91a	235	usb_put_hcd(hcd);
6fa3eb70 S	236	#ifdef CONFIG_MTK_XHCI
	237	mtk_xhci_reset(xhci);
	238	#endif
3429e91a SAS	239	kfree(xhci);
	240
	241	return 0;
	242	}
	243
6fa3eb70 S	244	#ifdef CONFIG_MTK_XHCI
	245	static const struct of_device_id mtk_xhci_of_match[] = {
	246	{
	247	.compatible = "mediatek,USB3_XHCI",
	248	},
	249	{ },
	250	};
	251	#endif
	252
3429e91a SAS	253	static struct platform_driver usb_xhci_driver = {
	254	.probe = xhci_plat_probe,
	255	.remove = xhci_plat_remove,
	256	.driver = {
	257	.name = "xhci-hcd",
6fa3eb70 S	258	#ifdef CONFIG_MTK_XHCI
	259	.of_match_table = of_match_ptr(mtk_xhci_of_match),
	260	#endif
3429e91a SAS	261	},
	262	};
	263	MODULE_ALIAS("platform:xhci-hcd");
	264
	265	int xhci_register_plat(void)
	266	{
	267	return platform_driver_register(&usb_xhci_driver);
	268	}
	269
	270	void xhci_unregister_plat(void)
	271	{
	272	platform_driver_unregister(&usb_xhci_driver);
	273	}