[mirror_ubuntu-bionic-kernel.git] / drivers / usb / phy / phy-omap-control.c

/*
 * omap-control-usb.c - The USB part of control module.
 *
 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Author: Kishon Vijay Abraham I <kishon@ti.com>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/usb/omap_control_usb.h>

/**
 * omap_control_usb_phy_power - power on/off the phy using control module reg
 * @dev: the control module device
 * @on: 0 or 1, based on powering on or off the PHY
 */
void omap_control_usb_phy_power(struct device *dev, int on)
{
	u32 val;
	unsigned long rate;
	struct omap_control_usb	*control_usb;

	if (IS_ERR(dev) || !dev) {
		pr_err("%s: invalid device\n", __func__);
		return;
	}

	control_usb = dev_get_drvdata(dev);
	if (!control_usb) {
		dev_err(dev, "%s: invalid control usb device\n", __func__);
		return;
	}

	if (control_usb->type == OMAP_CTRL_TYPE_OTGHS)
		return;

	val = readl(control_usb->power);

	switch (control_usb->type) {
	case OMAP_CTRL_TYPE_USB2:
		if (on)
			val &= ~OMAP_CTRL_DEV_PHY_PD;
		else
			val |= OMAP_CTRL_DEV_PHY_PD;
		break;

	case OMAP_CTRL_TYPE_PIPE3:
		rate = clk_get_rate(control_usb->sys_clk);
		rate = rate/1000000;

		if (on) {
			val &= ~(OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK |
					OMAP_CTRL_USB_PWRCTL_CLK_FREQ_MASK);
			val |= OMAP_CTRL_USB3_PHY_TX_RX_POWERON <<
				OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT;
			val |= rate << OMAP_CTRL_USB_PWRCTL_CLK_FREQ_SHIFT;
		} else {
			val &= ~OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK;
			val |= OMAP_CTRL_USB3_PHY_TX_RX_POWEROFF <<
				OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT;
		}
		break;

	case OMAP_CTRL_TYPE_DRA7USB2:
		if (on)
			val &= ~OMAP_CTRL_USB2_PHY_PD;
		else
			val |= OMAP_CTRL_USB2_PHY_PD;
		break;

	case OMAP_CTRL_TYPE_AM437USB2:
		if (on) {
			val &= ~(AM437X_CTRL_USB2_PHY_PD |
					AM437X_CTRL_USB2_OTG_PD);
			val |= (AM437X_CTRL_USB2_OTGVDET_EN |
					AM437X_CTRL_USB2_OTGSESSEND_EN);
		} else {
			val &= ~(AM437X_CTRL_USB2_OTGVDET_EN |
					AM437X_CTRL_USB2_OTGSESSEND_EN);
			val |= (AM437X_CTRL_USB2_PHY_PD |
					 AM437X_CTRL_USB2_OTG_PD);
		}
		break;
	default:
		dev_err(dev, "%s: type %d not recognized\n",
					__func__, control_usb->type);
		break;
	}

	writel(val, control_usb->power);
}
EXPORT_SYMBOL_GPL(omap_control_usb_phy_power);

/**
 * omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded
 * @ctrl_usb: struct omap_control_usb *
 *
 * Writes to the mailbox register to notify the usb core that a usb
 * device has been connected.
 */
static void omap_control_usb_host_mode(struct omap_control_usb *ctrl_usb)
{
	u32 val;

	val = readl(ctrl_usb->otghs_control);
	val &= ~(OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND);
	val |= OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID;
	writel(val, ctrl_usb->otghs_control);
}

/**
 * omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high
 * impedance
 * @ctrl_usb: struct omap_control_usb *
 *
 * Writes to the mailbox register to notify the usb core that it has been
 * connected to a usb host.
 */
static void omap_control_usb_device_mode(struct omap_control_usb *ctrl_usb)
{
	u32 val;

	val = readl(ctrl_usb->otghs_control);
	val &= ~OMAP_CTRL_DEV_SESSEND;
	val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_AVALID |
		OMAP_CTRL_DEV_VBUSVALID;
	writel(val, ctrl_usb->otghs_control);
}

/**
 * omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high
 * impedance
 * @ctrl_usb: struct omap_control_usb *
 *
 * Writes to the mailbox register to notify the usb core it's now in
 * disconnected state.
 */
static void omap_control_usb_set_sessionend(struct omap_control_usb *ctrl_usb)
{
	u32 val;

	val = readl(ctrl_usb->otghs_control);
	val &= ~(OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID);
	val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND;
	writel(val, ctrl_usb->otghs_control);
}

/**
 * omap_control_usb_set_mode - Calls to functions to set USB in one of host mode
 * or device mode or to denote disconnected state
 * @dev: the control module device
 * @mode: The mode to which usb should be configured
 *
 * This is an API to write to the mailbox register to notify the usb core that
 * a usb device has been connected.
 */
void omap_control_usb_set_mode(struct device *dev,
	enum omap_control_usb_mode mode)
{
	struct omap_control_usb	*ctrl_usb;

	if (IS_ERR(dev) || !dev)
		return;

	ctrl_usb = dev_get_drvdata(dev);

	if (!ctrl_usb) {
		dev_err(dev, "Invalid control usb device\n");
		return;
	}

	if (ctrl_usb->type != OMAP_CTRL_TYPE_OTGHS)
		return;

	switch (mode) {
	case USB_MODE_HOST:
		omap_control_usb_host_mode(ctrl_usb);
		break;
	case USB_MODE_DEVICE:
		omap_control_usb_device_mode(ctrl_usb);
		break;
	case USB_MODE_DISCONNECT:
		omap_control_usb_set_sessionend(ctrl_usb);
		break;
	default:
		dev_vdbg(dev, "invalid omap control usb mode\n");
	}
}
EXPORT_SYMBOL_GPL(omap_control_usb_set_mode);

#ifdef CONFIG_OF

static const enum omap_control_usb_type otghs_data = OMAP_CTRL_TYPE_OTGHS;
static const enum omap_control_usb_type usb2_data = OMAP_CTRL_TYPE_USB2;
static const enum omap_control_usb_type pipe3_data = OMAP_CTRL_TYPE_PIPE3;
static const enum omap_control_usb_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2;
static const enum omap_control_usb_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2;

static const struct of_device_id omap_control_usb_id_table[] = {
	{
		.compatible = "ti,control-phy-otghs",
		.data = &otghs_data,
	},
	{
		.compatible = "ti,control-phy-usb2",
		.data = &usb2_data,
	},
	{
		.compatible = "ti,control-phy-pipe3",
		.data = &pipe3_data,
	},
	{
		.compatible = "ti,control-phy-dra7usb2",
		.data = &dra7usb2_data,
	},
	{
		.compatible = "ti,control-phy-am437usb2",
		.data = &am437usb2_data,
	},
	{},
};
MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
#endif


static int omap_control_usb_probe(struct platform_device *pdev)
{
	struct resource	*res;
	const struct of_device_id *of_id;
	struct omap_control_usb *control_usb;

	of_id = of_match_device(of_match_ptr(omap_control_usb_id_table),
								&pdev->dev);
	if (!of_id)
		return -EINVAL;

	control_usb = devm_kzalloc(&pdev->dev, sizeof(*control_usb),
		GFP_KERNEL);
	if (!control_usb) {
		dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
		return -ENOMEM;
	}

	control_usb->dev = &pdev->dev;
	control_usb->type = *(enum omap_control_usb_type *)of_id->data;

	if (control_usb->type == OMAP_CTRL_TYPE_OTGHS) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
			"otghs_control");
		control_usb->otghs_control = devm_ioremap_resource(
			&pdev->dev, res);
		if (IS_ERR(control_usb->otghs_control))
			return PTR_ERR(control_usb->otghs_control);
	} else {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
				"power");
		control_usb->power = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(control_usb->power)) {
			dev_err(&pdev->dev, "Couldn't get power register\n");
			return PTR_ERR(control_usb->power);
		}
	}

	if (control_usb->type == OMAP_CTRL_TYPE_PIPE3) {
		control_usb->sys_clk = devm_clk_get(control_usb->dev,
			"sys_clkin");
		if (IS_ERR(control_usb->sys_clk)) {
			pr_err("%s: unable to get sys_clkin\n", __func__);
			return -EINVAL;
		}
	}

	dev_set_drvdata(control_usb->dev, control_usb);

	return 0;
}

static struct platform_driver omap_control_usb_driver = {
	.probe		= omap_control_usb_probe,
	.driver		= {
		.name	= "omap-control-usb",
		.owner	= THIS_MODULE,
		.of_match_table = of_match_ptr(omap_control_usb_id_table),
	},
};

static int __init omap_control_usb_init(void)
{
	return platform_driver_register(&omap_control_usb_driver);
}
subsys_initcall(omap_control_usb_init);

static void __exit omap_control_usb_exit(void)
{
	platform_driver_unregister(&omap_control_usb_driver);
}
module_exit(omap_control_usb_exit);

MODULE_ALIAS("platform: omap_control_usb");
MODULE_AUTHOR("Texas Instruments Inc.");
MODULE_DESCRIPTION("OMAP Control Module USB Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
01658f0f KVA	1	/*
	2	* omap-control-usb.c - The USB part of control module.
	3	*
	4	* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* Author: Kishon Vijay Abraham I <kishon@ti.com>
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/slab.h>
	22	#include <linux/of.h>
6cb9310a	23	#include <linux/of_device.h>
01658f0f KVA	24	#include <linux/err.h>
	25	#include <linux/io.h>
	26	#include <linux/clk.h>
	27	#include <linux/usb/omap_control_usb.h>
	28
01658f0f	29	/**
6cb9310a	30	* omap_control_usb_phy_power - power on/off the phy using control module reg
01658f0f	31	* @dev: the control module device
6cb9310a	32	* @on: 0 or 1, based on powering on or off the PHY
01658f0f	33	*/
6cb9310a	34	void omap_control_usb_phy_power(struct device *dev, int on)
01658f0f KVA	35	{
	36	u32 val;
	37	unsigned long rate;
6cb9310a	38	struct omap_control_usb *control_usb;
01658f0f	39
6cb9310a RQ	40	if (IS_ERR(dev) \|\| !dev) {
6cb9310a RQ	41	pr_err("%s: invalid device\n", __func__);
01658f0f	42	return;
6cb9310a	43	}
01658f0f	44
6cb9310a RQ	45	control_usb = dev_get_drvdata(dev);
	46	if (!control_usb) {
	47	dev_err(dev, "%s: invalid control usb device\n", __func__);
	48	return;
01658f0f KVA	49	}
01658f0f KVA	50
6cb9310a RQ	51	if (control_usb->type == OMAP_CTRL_TYPE_OTGHS)
6cb9310a RQ	52	return;
01658f0f	53
6cb9310a RQ	54	val = readl(control_usb->power);
	55
	56	switch (control_usb->type) {
	57	case OMAP_CTRL_TYPE_USB2:
	58	if (on)
	59	val &= ~OMAP_CTRL_DEV_PHY_PD;
	60	else
	61	val \|= OMAP_CTRL_DEV_PHY_PD;
	62	break;
01658f0f	63
6cb9310a RQ	64	case OMAP_CTRL_TYPE_PIPE3:
	65	rate = clk_get_rate(control_usb->sys_clk);
	66	rate = rate/1000000;
	67
	68	if (on) {
	69	val &= ~(OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK \|
	70	OMAP_CTRL_USB_PWRCTL_CLK_FREQ_MASK);
	71	val \|= OMAP_CTRL_USB3_PHY_TX_RX_POWERON <<
	72	OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT;
	73	val \|= rate << OMAP_CTRL_USB_PWRCTL_CLK_FREQ_SHIFT;
	74	} else {
	75	val &= ~OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK;
	76	val \|= OMAP_CTRL_USB3_PHY_TX_RX_POWEROFF <<
	77	OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT;
	78	}
	79	break;
01658f0f	80
6cb9310a RQ	81	case OMAP_CTRL_TYPE_DRA7USB2:
	82	if (on)
	83	val &= ~OMAP_CTRL_USB2_PHY_PD;
	84	else
	85	val \|= OMAP_CTRL_USB2_PHY_PD;
	86	break;
c4b34a3b GC	87
	88	case OMAP_CTRL_TYPE_AM437USB2:
	89	if (on) {
	90	val &= ~(AM437X_CTRL_USB2_PHY_PD \|
	91	AM437X_CTRL_USB2_OTG_PD);
	92	val \|= (AM437X_CTRL_USB2_OTGVDET_EN \|
	93	AM437X_CTRL_USB2_OTGSESSEND_EN);
	94	} else {
	95	val &= ~(AM437X_CTRL_USB2_OTGVDET_EN \|
	96	AM437X_CTRL_USB2_OTGSESSEND_EN);
	97	val \|= (AM437X_CTRL_USB2_PHY_PD \|
	98	AM437X_CTRL_USB2_OTG_PD);
	99	}
	100	break;
6cb9310a RQ	101	default:
	102	dev_err(dev, "%s: type %d not recognized\n",
	103	__func__, control_usb->type);
	104	break;
	105	}
01658f0f	106
6cb9310a	107	writel(val, control_usb->power);
01658f0f KVA	108	}
	109	EXPORT_SYMBOL_GPL(omap_control_usb_phy_power);
	110
	111	/**
	112	* omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded
	113	* @ctrl_usb: struct omap_control_usb *
	114	*
	115	* Writes to the mailbox register to notify the usb core that a usb
	116	* device has been connected.
	117	*/
	118	static void omap_control_usb_host_mode(struct omap_control_usb *ctrl_usb)
	119	{
	120	u32 val;
	121
	122	val = readl(ctrl_usb->otghs_control);
	123	val &= ~(OMAP_CTRL_DEV_IDDIG \| OMAP_CTRL_DEV_SESSEND);
	124	val \|= OMAP_CTRL_DEV_AVALID \| OMAP_CTRL_DEV_VBUSVALID;
	125	writel(val, ctrl_usb->otghs_control);
	126	}
	127
	128	/**
	129	* omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high
	130	* impedance
	131	* @ctrl_usb: struct omap_control_usb *
	132	*
	133	* Writes to the mailbox register to notify the usb core that it has been
	134	* connected to a usb host.
	135	*/
	136	static void omap_control_usb_device_mode(struct omap_control_usb *ctrl_usb)
	137	{
	138	u32 val;
	139
	140	val = readl(ctrl_usb->otghs_control);
	141	val &= ~OMAP_CTRL_DEV_SESSEND;
	142	val \|= OMAP_CTRL_DEV_IDDIG \| OMAP_CTRL_DEV_AVALID \|
	143	OMAP_CTRL_DEV_VBUSVALID;
	144	writel(val, ctrl_usb->otghs_control);
	145	}
	146
	147	/**
	148	* omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high
	149	* impedance
	150	* @ctrl_usb: struct omap_control_usb *
	151	*
	152	* Writes to the mailbox register to notify the usb core it's now in
	153	* disconnected state.
	154	*/
	155	static void omap_control_usb_set_sessionend(struct omap_control_usb *ctrl_usb)
	156	{
	157	u32 val;
	158
	159	val = readl(ctrl_usb->otghs_control);
	160	val &= ~(OMAP_CTRL_DEV_AVALID \| OMAP_CTRL_DEV_VBUSVALID);
	161	val \|= OMAP_CTRL_DEV_IDDIG \| OMAP_CTRL_DEV_SESSEND;
	162	writel(val, ctrl_usb->otghs_control);
	163	}
	164
	165	/**
	166	* omap_control_usb_set_mode - Calls to functions to set USB in one of host mode
	167	* or device mode or to denote disconnected state
	168	* @dev: the control module device
	169	* @mode: The mode to which usb should be configured
	170	*
	171	* This is an API to write to the mailbox register to notify the usb core that
172	* a usb device has been connected.
173	*/
174	void omap_control_usb_set_mode(struct device *dev,
175	enum omap_control_usb_mode mode)
176	{
177	struct omap_control_usb *ctrl_usb;
178
0bb85dc2	179	if (IS_ERR(dev) \|\| !dev)
01658f0f KVA	180	return;
	181
	182	ctrl_usb = dev_get_drvdata(dev);
	183
0bb85dc2 RQ	184	if (!ctrl_usb) {
	185	dev_err(dev, "Invalid control usb device\n");
	186	return;
	187	}
	188
	189	if (ctrl_usb->type != OMAP_CTRL_TYPE_OTGHS)
	190	return;
	191
01658f0f KVA	192	switch (mode) {
	193	case USB_MODE_HOST:
	194	omap_control_usb_host_mode(ctrl_usb);
	195	break;
	196	case USB_MODE_DEVICE:
	197	omap_control_usb_device_mode(ctrl_usb);
	198	break;
	199	case USB_MODE_DISCONNECT:
	200	omap_control_usb_set_sessionend(ctrl_usb);
	201	break;
	202	default:
	203	dev_vdbg(dev, "invalid omap control usb mode\n");
	204	}
	205	}
	206	EXPORT_SYMBOL_GPL(omap_control_usb_set_mode);
	207
6cb9310a RQ	208	#ifdef CONFIG_OF
	209
	210	static const enum omap_control_usb_type otghs_data = OMAP_CTRL_TYPE_OTGHS;
	211	static const enum omap_control_usb_type usb2_data = OMAP_CTRL_TYPE_USB2;
	212	static const enum omap_control_usb_type pipe3_data = OMAP_CTRL_TYPE_PIPE3;
	213	static const enum omap_control_usb_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2;
c4b34a3b	214	static const enum omap_control_usb_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2;
6cb9310a RQ	215
	216	static const struct of_device_id omap_control_usb_id_table[] = {
	217	{
	218	.compatible = "ti,control-phy-otghs",
	219	.data = &otghs_data,
	220	},
	221	{
	222	.compatible = "ti,control-phy-usb2",
	223	.data = &usb2_data,
	224	},
	225	{
	226	.compatible = "ti,control-phy-pipe3",
	227	.data = &pipe3_data,
	228	},
	229	{
	230	.compatible = "ti,control-phy-dra7usb2",
	231	.data = &dra7usb2_data,
	232	},
c4b34a3b GC	233	{
	234	.compatible = "ti,control-phy-am437usb2",
	235	.data = &am437usb2_data,
	236	},
6cb9310a RQ	237	{},
	238	};
	239	MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
	240	#endif
	241
	242
01658f0f KVA	243	static int omap_control_usb_probe(struct platform_device *pdev)
	244	{
	245	struct resource *res;
6cb9310a	246	const struct of_device_id *of_id;
0bb85dc2	247	struct omap_control_usb *control_usb;
6cb9310a RQ	248
	249	of_id = of_match_device(of_match_ptr(omap_control_usb_id_table),
	250	&pdev->dev);
	251	if (!of_id)
	252	return -EINVAL;
01658f0f KVA	253
	254	control_usb = devm_kzalloc(&pdev->dev, sizeof(*control_usb),
	255	GFP_KERNEL);
	256	if (!control_usb) {
	257	dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
	258	return -ENOMEM;
	259	}
	260
6cb9310a RQ	261	control_usb->dev = &pdev->dev;
6cb9310a RQ	262	control_usb->type = (enum omap_control_usb_type )of_id->data;
01658f0f	263
6cb9310a	264	if (control_usb->type == OMAP_CTRL_TYPE_OTGHS) {
01658f0f KVA	265	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
01658f0f KVA	266	"otghs_control");
57ae575b	267	control_usb->otghs_control = devm_ioremap_resource(
01658f0f	268	&pdev->dev, res);
57ae575b SK	269	if (IS_ERR(control_usb->otghs_control))
57ae575b SK	270	return PTR_ERR(control_usb->otghs_control);
6cb9310a	271	} else {
01658f0f	272	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
6cb9310a RQ	273	"power");
	274	control_usb->power = devm_ioremap_resource(&pdev->dev, res);
	275	if (IS_ERR(control_usb->power)) {
	276	dev_err(&pdev->dev, "Couldn't get power register\n");
	277	return PTR_ERR(control_usb->power);
	278	}
	279	}
01658f0f	280
6cb9310a	281	if (control_usb->type == OMAP_CTRL_TYPE_PIPE3) {
01658f0f KVA	282	control_usb->sys_clk = devm_clk_get(control_usb->dev,
	283	"sys_clkin");
	284	if (IS_ERR(control_usb->sys_clk)) {
	285	pr_err("%s: unable to get sys_clkin\n", __func__);
	286	return -EINVAL;
	287	}
	288	}
	289
01658f0f KVA	290	dev_set_drvdata(control_usb->dev, control_usb);
	291
	292	return 0;
	293	}
	294
01658f0f KVA	295	static struct platform_driver omap_control_usb_driver = {
	296	.probe = omap_control_usb_probe,
	297	.driver = {
	298	.name = "omap-control-usb",
	299	.owner = THIS_MODULE,
	300	.of_match_table = of_match_ptr(omap_control_usb_id_table),
	301	},
	302	};
	303
	304	static int __init omap_control_usb_init(void)
	305	{
	306	return platform_driver_register(&omap_control_usb_driver);
	307	}
	308	subsys_initcall(omap_control_usb_init);
	309
	310	static void __exit omap_control_usb_exit(void)
	311	{
	312	platform_driver_unregister(&omap_control_usb_driver);
	313	}
	314	module_exit(omap_control_usb_exit);
	315
	316	MODULE_ALIAS("platform: omap_control_usb");
	317	MODULE_AUTHOR("Texas Instruments Inc.");
	318	MODULE_DESCRIPTION("OMAP Control Module USB Driver");
	319	MODULE_LICENSE("GPL v2");