[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / dwc3 / dwc3-omap.c

/**
 * dwc3-omap.c - OMAP Specific Glue layer
 *
 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
 * All rights reserved.
 *
 * Authors: Felipe Balbi <balbi@ti.com>,
 *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The names of the above-listed copyright holders may not be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2, as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/platform_data/dwc3-omap.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/io.h>

#include "io.h"

/*
 * All these registers belong to OMAP's Wrapper around the
 * DesignWare USB3 Core.
 */

#define USBOTGSS_REVISION			0x0000
#define USBOTGSS_SYSCONFIG			0x0010
#define USBOTGSS_IRQ_EOI			0x0020
#define USBOTGSS_IRQSTATUS_RAW_0		0x0024
#define USBOTGSS_IRQSTATUS_0			0x0028
#define USBOTGSS_IRQENABLE_SET_0		0x002c
#define USBOTGSS_IRQENABLE_CLR_0		0x0030
#define USBOTGSS_IRQSTATUS_RAW_1		0x0034
#define USBOTGSS_IRQSTATUS_1			0x0038
#define USBOTGSS_IRQENABLE_SET_1		0x003c
#define USBOTGSS_IRQENABLE_CLR_1		0x0040
#define USBOTGSS_UTMI_OTG_CTRL			0x0080
#define USBOTGSS_UTMI_OTG_STATUS		0x0084
#define USBOTGSS_MMRAM_OFFSET			0x0100
#define USBOTGSS_FLADJ				0x0104
#define USBOTGSS_DEBUG_CFG			0x0108
#define USBOTGSS_DEBUG_DATA			0x010c

/* SYSCONFIG REGISTER */
#define USBOTGSS_SYSCONFIG_DMADISABLE		(1 << 16)
#define USBOTGSS_SYSCONFIG_STANDBYMODE(x)	((x) << 4)
#define USBOTGSS_SYSCONFIG_IDLEMODE(x)		((x) << 2)

/* IRQ_EOI REGISTER */
#define USBOTGSS_IRQ_EOI_LINE_NUMBER		(1 << 0)

/* IRQS0 BITS */
#define USBOTGSS_IRQO_COREIRQ_ST		(1 << 0)

/* IRQ1 BITS */
#define USBOTGSS_IRQ1_DMADISABLECLR		(1 << 17)
#define USBOTGSS_IRQ1_OEVT			(1 << 16)
#define USBOTGSS_IRQ1_DRVVBUS_RISE		(1 << 13)
#define USBOTGSS_IRQ1_CHRGVBUS_RISE		(1 << 12)
#define USBOTGSS_IRQ1_DISCHRGVBUS_RISE		(1 << 11)
#define USBOTGSS_IRQ1_IDPULLUP_RISE		(1 << 8)
#define USBOTGSS_IRQ1_DRVVBUS_FALL		(1 << 5)
#define USBOTGSS_IRQ1_CHRGVBUS_FALL		(1 << 4)
#define USBOTGSS_IRQ1_DISCHRGVBUS_FALL		(1 << 3)
#define USBOTGSS_IRQ1_IDPULLUP_FALL		(1 << 0)

/* UTMI_OTG_CTRL REGISTER */
#define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS		(1 << 5)
#define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS		(1 << 4)
#define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS	(1 << 3)
#define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP		(1 << 0)

/* UTMI_OTG_STATUS REGISTER */
#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE	(1 << 31)
#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT	(1 << 9)
#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8)
#define USBOTGSS_UTMI_OTG_STATUS_IDDIG		(1 << 4)
#define USBOTGSS_UTMI_OTG_STATUS_SESSEND	(1 << 3)
#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID	(1 << 2)
#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID	(1 << 1)

struct dwc3_omap {
	/* device lock */
	spinlock_t		lock;

	struct platform_device	*dwc3;
	struct device		*dev;

	int			irq;
	void __iomem		*base;

	void			*context;
	u32			resource_size;

	u32			dma_status:1;
};

static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
{
	struct dwc3_omap	*omap = _omap;
	u32			reg;

	spin_lock(&omap->lock);

	reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_1);

	if (reg & USBOTGSS_IRQ1_DMADISABLECLR) {
		dev_dbg(omap->dev, "DMA Disable was Cleared\n");
		omap->dma_status = false;
	}

	if (reg & USBOTGSS_IRQ1_OEVT)
		dev_dbg(omap->dev, "OTG Event\n");

	if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE)
		dev_dbg(omap->dev, "DRVVBUS Rise\n");

	if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE)
		dev_dbg(omap->dev, "CHRGVBUS Rise\n");

	if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE)
		dev_dbg(omap->dev, "DISCHRGVBUS Rise\n");

	if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE)
		dev_dbg(omap->dev, "IDPULLUP Rise\n");

	if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL)
		dev_dbg(omap->dev, "DRVVBUS Fall\n");

	if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL)
		dev_dbg(omap->dev, "CHRGVBUS Fall\n");

	if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL)
		dev_dbg(omap->dev, "DISCHRGVBUS Fall\n");

	if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL)
		dev_dbg(omap->dev, "IDPULLUP Fall\n");

	dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_1, reg);

	reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_0);
	dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_0, reg);

	spin_unlock(&omap->lock);

	return IRQ_HANDLED;
}

static int __devinit dwc3_omap_probe(struct platform_device *pdev)
{
	struct dwc3_omap_data	*pdata = pdev->dev.platform_data;
	struct platform_device	*dwc3;
	struct dwc3_omap	*omap;
	struct resource		*res;

	int			ret = -ENOMEM;
	int			irq;

	u32			reg;

	void __iomem		*base;
	void			*context;

	omap = kzalloc(sizeof(*omap), GFP_KERNEL);
	if (!omap) {
		dev_err(&pdev->dev, "not enough memory\n");
		goto err0;
	}

	platform_set_drvdata(pdev, omap);

	irq = platform_get_irq(pdev, 1);
	if (irq < 0) {
		dev_err(&pdev->dev, "missing IRQ resource\n");
		ret = -EINVAL;
		goto err1;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!res) {
		dev_err(&pdev->dev, "missing memory base resource\n");
		ret = -EINVAL;
		goto err1;
	}

	base = ioremap_nocache(res->start, resource_size(res));
	if (!base) {
		dev_err(&pdev->dev, "ioremap failed\n");
		goto err1;
	}

	dwc3 = platform_device_alloc("dwc3-omap", -1);
	if (!dwc3) {
		dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
		goto err2;
	}

	context = kzalloc(resource_size(res), GFP_KERNEL);
	if (!context) {
		dev_err(&pdev->dev, "couldn't allocate dwc3 context memory\n");
		goto err3;
	}

	spin_lock_init(&omap->lock);
	dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);

	dwc3->dev.parent = &pdev->dev;
	dwc3->dev.dma_mask = pdev->dev.dma_mask;
	dwc3->dev.dma_parms = pdev->dev.dma_parms;
	omap->resource_size = resource_size(res);
	omap->context	= context;
	omap->dev	= &pdev->dev;
	omap->irq	= irq;
	omap->base	= base;
	omap->dwc3	= dwc3;

	reg = dwc3_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);

	if (!pdata) {
		dev_dbg(&pdev->dev, "missing platform data\n");
	} else {
		switch (pdata->utmi_mode) {
		case DWC3_OMAP_UTMI_MODE_SW:
			reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
			break;
		case DWC3_OMAP_UTMI_MODE_HW:
			reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
			break;
		default:
			dev_dbg(&pdev->dev, "UNKNOWN utmi mode %d\n",
					pdata->utmi_mode);
		}
	}

	dwc3_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg);

	/* check the DMA Status */
	reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG);
	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);

	ret = request_irq(omap->irq, dwc3_omap_interrupt, 0,
			"dwc3-omap", omap);
	if (ret) {
		dev_err(&pdev->dev, "failed to request IRQ #%d --> %d\n",
				omap->irq, ret);
		goto err4;
	}

	/* enable all IRQs */
	reg = USBOTGSS_IRQO_COREIRQ_ST;
	dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, reg);

	reg = (USBOTGSS_IRQ1_OEVT |
			USBOTGSS_IRQ1_DRVVBUS_RISE |
			USBOTGSS_IRQ1_CHRGVBUS_RISE |
			USBOTGSS_IRQ1_DISCHRGVBUS_RISE |
			USBOTGSS_IRQ1_IDPULLUP_RISE |
			USBOTGSS_IRQ1_DRVVBUS_FALL |
			USBOTGSS_IRQ1_CHRGVBUS_FALL |
			USBOTGSS_IRQ1_DISCHRGVBUS_FALL |
			USBOTGSS_IRQ1_IDPULLUP_FALL);

	dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg);

	ret = platform_device_add_resources(dwc3, pdev->resource,
			pdev->num_resources);
	if (ret) {
		dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
		goto err5;
	}

	ret = platform_device_add(dwc3);
	if (ret) {
		dev_err(&pdev->dev, "failed to register dwc3 device\n");
		goto err5;
	}

	return 0;

err5:
	free_irq(omap->irq, omap);

err4:
	kfree(omap->context);

err3:
	platform_device_put(dwc3);

err2:
	iounmap(base);

err1:
	kfree(omap);

err0:
	return ret;
}

static int __devexit dwc3_omap_remove(struct platform_device *pdev)
{
	struct dwc3_omap	*omap = platform_get_drvdata(pdev);

	platform_device_unregister(omap->dwc3);

	free_irq(omap->irq, omap);
	iounmap(omap->base);

	kfree(omap->context);
	kfree(omap);

	return 0;
}

static const struct of_device_id of_dwc3_matach[] = {
	{
		"ti,dwc3",
	},
	{ },
};
MODULE_DEVICE_TABLE(of, of_dwc3_matach);

static struct platform_driver dwc3_omap_driver = {
	.probe		= dwc3_omap_probe,
	.remove		= __devexit_p(dwc3_omap_remove),
	.driver		= {
		.name	= "omap-dwc3",
		.of_match_table	= of_dwc3_matach,
	},
};

MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");

static int __devinit dwc3_omap_init(void)
{
	return platform_driver_register(&dwc3_omap_driver);
}
module_init(dwc3_omap_init);

static void __exit dwc3_omap_exit(void)
{
	platform_driver_unregister(&dwc3_omap_driver);
}
module_exit(dwc3_omap_exit);
Commit	Line	Data
72246da4 FB	1	/**
	2	* dwc3-omap.c - OMAP Specific Glue layer
	3	*
	4	* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
	5	* All rights reserved.
	6	*
	7	* Authors: Felipe Balbi <balbi@ti.com>,
	8	* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions, and the following disclaimer,
	15	* without modification.
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in the
	18	* documentation and/or other materials provided with the distribution.
	19	* 3. The names of the above-listed copyright holders may not be used
	20	* to endorse or promote products derived from this software without
	21	* specific prior written permission.
	22	*
	23	* ALTERNATIVELY, this software may be distributed under the terms of the
	24	* GNU General Public License ("GPL") version 2, as published by the Free
	25	* Software Foundation.
	26	*
	27	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
	28	* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	29	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	30	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	31	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	32	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	33	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	34	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	35	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	36	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	37	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	38	*/
	39
a72e658b	40	#include <linux/module.h>
72246da4 FB	41	#include <linux/kernel.h>
	42	#include <linux/slab.h>
	43	#include <linux/interrupt.h>
	44	#include <linux/spinlock.h>
	45	#include <linux/platform_device.h>
9962444f	46	#include <linux/platform_data/dwc3-omap.h>
72246da4 FB	47	#include <linux/dma-mapping.h>
	48	#include <linux/ioport.h>
	49	#include <linux/io.h>
	50
	51	#include "io.h"
	52
	53	/*
	54	* All these registers belong to OMAP's Wrapper around the
	55	* DesignWare USB3 Core.
	56	*/
	57
	58	#define USBOTGSS_REVISION 0x0000
	59	#define USBOTGSS_SYSCONFIG 0x0010
	60	#define USBOTGSS_IRQ_EOI 0x0020
	61	#define USBOTGSS_IRQSTATUS_RAW_0 0x0024
	62	#define USBOTGSS_IRQSTATUS_0 0x0028
	63	#define USBOTGSS_IRQENABLE_SET_0 0x002c
	64	#define USBOTGSS_IRQENABLE_CLR_0 0x0030
	65	#define USBOTGSS_IRQSTATUS_RAW_1 0x0034
	66	#define USBOTGSS_IRQSTATUS_1 0x0038
	67	#define USBOTGSS_IRQENABLE_SET_1 0x003c
	68	#define USBOTGSS_IRQENABLE_CLR_1 0x0040
	69	#define USBOTGSS_UTMI_OTG_CTRL 0x0080
	70	#define USBOTGSS_UTMI_OTG_STATUS 0x0084
	71	#define USBOTGSS_MMRAM_OFFSET 0x0100
	72	#define USBOTGSS_FLADJ 0x0104
	73	#define USBOTGSS_DEBUG_CFG 0x0108
	74	#define USBOTGSS_DEBUG_DATA 0x010c
	75
	76	/* SYSCONFIG REGISTER */
	77	#define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16)
	78	#define USBOTGSS_SYSCONFIG_STANDBYMODE(x) ((x) << 4)
	79	#define USBOTGSS_SYSCONFIG_IDLEMODE(x) ((x) << 2)
	80
	81	/* IRQ_EOI REGISTER */
	82	#define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0)
	83
	84	/* IRQS0 BITS */
	85	#define USBOTGSS_IRQO_COREIRQ_ST (1 << 0)
	86
	87	/* IRQ1 BITS */
	88	#define USBOTGSS_IRQ1_DMADISABLECLR (1 << 17)
	89	#define USBOTGSS_IRQ1_OEVT (1 << 16)
	90	#define USBOTGSS_IRQ1_DRVVBUS_RISE (1 << 13)
	91	#define USBOTGSS_IRQ1_CHRGVBUS_RISE (1 << 12)
	92	#define USBOTGSS_IRQ1_DISCHRGVBUS_RISE (1 << 11)
	93	#define USBOTGSS_IRQ1_IDPULLUP_RISE (1 << 8)
	94	#define USBOTGSS_IRQ1_DRVVBUS_FALL (1 << 5)
	95	#define USBOTGSS_IRQ1_CHRGVBUS_FALL (1 << 4)
	96	#define USBOTGSS_IRQ1_DISCHRGVBUS_FALL (1 << 3)
	97	#define USBOTGSS_IRQ1_IDPULLUP_FALL (1 << 0)
	98
	99	/* UTMI_OTG_CTRL REGISTER */
	100	#define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS (1 << 5)
	101	#define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS (1 << 4)
	102	#define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS (1 << 3)
	103	#define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP (1 << 0)
	104
	105	/* UTMI_OTG_STATUS REGISTER */
	106	#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE (1 << 31)
	107	#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT (1 << 9)
	108	#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8)
	109	#define USBOTGSS_UTMI_OTG_STATUS_IDDIG (1 << 4)
	110	#define USBOTGSS_UTMI_OTG_STATUS_SESSEND (1 << 3)
111	#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID (1 << 2)
112	#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1)
113
114	struct dwc3_omap {
115	/* device lock */
116	spinlock_t lock;
117
118	struct platform_device *dwc3;
119	struct device *dev;
120
121	int irq;
122	void __iomem *base;
123
124	void *context;
125	u32 resource_size;
126
127	u32 dma_status:1;
128	};
129
72246da4 FB	130	static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
	131	{
	132	struct dwc3_omap *omap = _omap;
	133	u32 reg;
72246da4 FB	134
	135	spin_lock(&omap->lock);
	136
	137	reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_1);
72246da4 FB	138
72246da4 FB	139	if (reg & USBOTGSS_IRQ1_DMADISABLECLR) {
ccba3bca	140	dev_dbg(omap->dev, "DMA Disable was Cleared\n");
72246da4 FB	141	omap->dma_status = false;
	142	}
	143
	144	if (reg & USBOTGSS_IRQ1_OEVT)
ccba3bca	145	dev_dbg(omap->dev, "OTG Event\n");
72246da4	146
42077b0a	147	if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE)
ccba3bca	148	dev_dbg(omap->dev, "DRVVBUS Rise\n");
72246da4	149
42077b0a	150	if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE)
ccba3bca	151	dev_dbg(omap->dev, "CHRGVBUS Rise\n");
72246da4	152
42077b0a	153	if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE)
ccba3bca	154	dev_dbg(omap->dev, "DISCHRGVBUS Rise\n");
72246da4	155
42077b0a	156	if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE)
ccba3bca	157	dev_dbg(omap->dev, "IDPULLUP Rise\n");
72246da4	158
42077b0a	159	if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL)
ccba3bca	160	dev_dbg(omap->dev, "DRVVBUS Fall\n");
72246da4	161
42077b0a	162	if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL)
ccba3bca	163	dev_dbg(omap->dev, "CHRGVBUS Fall\n");
72246da4	164
42077b0a	165	if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL)
ccba3bca	166	dev_dbg(omap->dev, "DISCHRGVBUS Fall\n");
72246da4	167
42077b0a	168	if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL)
ccba3bca	169	dev_dbg(omap->dev, "IDPULLUP Fall\n");
72246da4	170
42077b0a FB	171	dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_1, reg);
	172
	173	reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_0);
	174	dwc3_writel(omap->base, USBOTGSS_IRQSTATUS_0, reg);
72246da4 FB	175
	176	spin_unlock(&omap->lock);
	177
	178	return IRQ_HANDLED;
	179	}
	180
	181	static int __devinit dwc3_omap_probe(struct platform_device *pdev)
	182	{
9962444f	183	struct dwc3_omap_data *pdata = pdev->dev.platform_data;
72246da4 FB	184	struct platform_device *dwc3;
	185	struct dwc3_omap *omap;
	186	struct resource *res;
	187
	188	int ret = -ENOMEM;
	189	int irq;
	190
	191	u32 reg;
	192
	193	void __iomem *base;
	194	void *context;
	195
	196	omap = kzalloc(sizeof(*omap), GFP_KERNEL);
	197	if (!omap) {
	198	dev_err(&pdev->dev, "not enough memory\n");
	199	goto err0;
	200	}
	201
	202	platform_set_drvdata(pdev, omap);
	203
	204	irq = platform_get_irq(pdev, 1);
	205	if (irq < 0) {
	206	dev_err(&pdev->dev, "missing IRQ resource\n");
	207	ret = -EINVAL;
	208	goto err1;
	209	}
	210
	211	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	212	if (!res) {
	213	dev_err(&pdev->dev, "missing memory base resource\n");
	214	ret = -EINVAL;
	215	goto err1;
	216	}
	217
	218	base = ioremap_nocache(res->start, resource_size(res));
	219	if (!base) {
	220	dev_err(&pdev->dev, "ioremap failed\n");
	221	goto err1;
	222	}
	223
	224	dwc3 = platform_device_alloc("dwc3-omap", -1);
	225	if (!dwc3) {
	226	dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
	227	goto err2;
	228	}
	229
	230	context = kzalloc(resource_size(res), GFP_KERNEL);
	231	if (!context) {
	232	dev_err(&pdev->dev, "couldn't allocate dwc3 context memory\n");
	233	goto err3;
	234	}
	235
	236	spin_lock_init(&omap->lock);
	237	dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
	238
	239	dwc3->dev.parent = &pdev->dev;
	240	dwc3->dev.dma_mask = pdev->dev.dma_mask;
	241	dwc3->dev.dma_parms = pdev->dev.dma_parms;
	242	omap->resource_size = resource_size(res);
	243	omap->context = context;
	244	omap->dev = &pdev->dev;
	245	omap->irq = irq;
	246	omap->base = base;
	247	omap->dwc3 = dwc3;
248
9962444f FB	249	reg = dwc3_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
	250
	251	if (!pdata) {
	252	dev_dbg(&pdev->dev, "missing platform data\n");
	253	} else {
	254	switch (pdata->utmi_mode) {
	255	case DWC3_OMAP_UTMI_MODE_SW:
	256	reg \|= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
	257	break;
	258	case DWC3_OMAP_UTMI_MODE_HW:
	259	reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
	260	break;
	261	default:
	262	dev_dbg(&pdev->dev, "UNKNOWN utmi mode %d\n",
	263	pdata->utmi_mode);
	264	}
	265	}
	266
	267	dwc3_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg);
	268
72246da4 FB	269	/* check the DMA Status */
	270	reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG);
	271	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
	272
	273	ret = request_irq(omap->irq, dwc3_omap_interrupt, 0,
dd17a6b2	274	"dwc3-omap", omap);
72246da4 FB	275	if (ret) {
	276	dev_err(&pdev->dev, "failed to request IRQ #%d --> %d\n",
	277	omap->irq, ret);
	278	goto err4;
	279	}
	280
	281	/* enable all IRQs */
df01c61e FB	282	reg = USBOTGSS_IRQO_COREIRQ_ST;
df01c61e FB	283	dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, reg);
72246da4	284
324e5481	285	reg = (USBOTGSS_IRQ1_OEVT \|
72246da4 FB	286	USBOTGSS_IRQ1_DRVVBUS_RISE \|
	287	USBOTGSS_IRQ1_CHRGVBUS_RISE \|
	288	USBOTGSS_IRQ1_DISCHRGVBUS_RISE \|
	289	USBOTGSS_IRQ1_IDPULLUP_RISE \|
	290	USBOTGSS_IRQ1_DRVVBUS_FALL \|
	291	USBOTGSS_IRQ1_CHRGVBUS_FALL \|
	292	USBOTGSS_IRQ1_DISCHRGVBUS_FALL \|
	293	USBOTGSS_IRQ1_IDPULLUP_FALL);
	294
	295	dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg);
	296
	297	ret = platform_device_add_resources(dwc3, pdev->resource,
	298	pdev->num_resources);
	299	if (ret) {
	300	dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
	301	goto err5;
	302	}
	303
	304	ret = platform_device_add(dwc3);
	305	if (ret) {
	306	dev_err(&pdev->dev, "failed to register dwc3 device\n");
	307	goto err5;
	308	}
	309
	310	return 0;
	311
	312	err5:
	313	free_irq(omap->irq, omap);
	314
	315	err4:
	316	kfree(omap->context);
	317
	318	err3:
	319	platform_device_put(dwc3);
	320
	321	err2:
	322	iounmap(base);
	323
	324	err1:
	325	kfree(omap);
	326
	327	err0:
	328	return ret;
	329	}
	330
	331	static int __devexit dwc3_omap_remove(struct platform_device *pdev)
	332	{
	333	struct dwc3_omap *omap = platform_get_drvdata(pdev);
	334
	335	platform_device_unregister(omap->dwc3);
	336
	337	free_irq(omap->irq, omap);
	338	iounmap(omap->base);
	339
	340	kfree(omap->context);
	341	kfree(omap);
	342
	343	return 0;
	344	}
	345
	346	static const struct of_device_id of_dwc3_matach[] = {
	347	{
	348	"ti,dwc3",
	349	},
350	{ },
351	};
352	MODULE_DEVICE_TABLE(of, of_dwc3_matach);
353
354	static struct platform_driver dwc3_omap_driver = {
355	.probe = dwc3_omap_probe,
356	.remove = __devexit_p(dwc3_omap_remove),
357	.driver = {
358	.name = "omap-dwc3",
72246da4 FB	359	.of_match_table = of_dwc3_matach,
	360	},
	361	};
	362
	363	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	364	MODULE_LICENSE("Dual BSD/GPL");
	365	MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
	366
	367	static int __devinit dwc3_omap_init(void)
	368	{
	369	return platform_driver_register(&dwc3_omap_driver);
	370	}
	371	module_init(dwc3_omap_init);
	372
	373	static void __exit dwc3_omap_exit(void)
	374	{
	375	platform_driver_unregister(&dwc3_omap_driver);
	376	}
	377	module_exit(dwc3_omap_exit);