[mirror_ubuntu-jammy-kernel.git] / drivers / usb / host / ohci-nxp.c

/*
 * driver for NXP USB Host devices
 *
 * Currently supported OHCI host devices:
 * - NXP LPC32xx
 *
 * Authors: Dmitry Chigirev <source@mvista.com>
 *	    Vitaly Wool <vitalywool@gmail.com>
 *
 * register initialization is based on code examples provided by Philips
 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
 *
 * NOTE: This driver does not have suspend/resume functionality
 * This driver is intended for engineering development purposes only
 *
 * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
 * the terms of the GNU General Public License version 2. This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb/isp1301.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>

#include "ohci.h"

#include <mach/hardware.h>

#define USB_CONFIG_BASE		0x31020000
#define USB_OTG_STAT_CONTROL	IO_ADDRESS(USB_CONFIG_BASE + 0x110)

/* USB_OTG_STAT_CONTROL bit defines */
#define TRANSPARENT_I2C_EN	(1 << 7)
#define HOST_EN			(1 << 0)

/* On LPC32xx, those are undefined */
#ifndef start_int_set_falling_edge
#define start_int_set_falling_edge(irq)
#define start_int_set_rising_edge(irq)
#define start_int_ack(irq)
#define start_int_mask(irq)
#define start_int_umask(irq)
#endif

#define DRIVER_DESC "OHCI NXP driver"

static const char hcd_name[] = "ohci-nxp";
static struct hc_driver __read_mostly ohci_nxp_hc_driver;

static struct i2c_client *isp1301_i2c_client;

static struct clk *usb_host_clk;

static void isp1301_configure_lpc32xx(void)
{
	/* LPC32XX only supports DAT_SE0 USB mode */
	/* This sequence is important */

	/* Disable transparent UART mode first */
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		MC1_UART_EN);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		~MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
				  ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		  (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
		  ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_2,
		(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1,
		(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
		(OTG1_DM_PULLUP | OTG1_DP_PULLUP));
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
		~0);
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);

	printk(KERN_INFO "ISP1301 Vendor ID  : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
}

static void isp1301_configure(void)
{
	isp1301_configure_lpc32xx();
}

static inline void isp1301_vbus_on(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
				  OTG1_VBUS_DRV);
}

static inline void isp1301_vbus_off(void)
{
	i2c_smbus_write_byte_data(isp1301_i2c_client,
		ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
		OTG1_VBUS_DRV);
}

static void ohci_nxp_start_hc(void)
{
	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	isp1301_vbus_on();
}

static void ohci_nxp_stop_hc(void)
{
	unsigned long tmp;
	isp1301_vbus_off();
	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
}

static int ohci_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	const struct hc_driver *driver = &ohci_nxp_hc_driver;
	struct resource *res;
	int ret = 0, irq;
	struct device_node *isp1301_node;

	if (pdev->dev.of_node) {
		isp1301_node = of_parse_phandle(pdev->dev.of_node,
						"transceiver", 0);
	} else {
		isp1301_node = NULL;
	}

	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	if (!isp1301_i2c_client) {
		return -EPROBE_DEFER;
	}

	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		goto fail_disable;

	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
	if (usb_disabled()) {
		dev_err(&pdev->dev, "USB is disabled\n");
		ret = -ENODEV;
		goto fail_disable;
	}

	/* Enable USB host clock */
	usb_host_clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(usb_host_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
		ret = PTR_ERR(usb_host_clk);
		goto fail_disable;
	}

	ret = clk_prepare_enable(usb_host_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
		goto fail_disable;
	}

	isp1301_configure();

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
		ret = -ENOMEM;
		goto fail_hcd;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto fail_resource;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto fail_resource;
	}

	ohci_nxp_start_hc();
	platform_set_drvdata(pdev, hcd);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret == 0) {
		device_wakeup_enable(hcd->self.controller);
		return ret;
	}

	ohci_nxp_stop_hc();
fail_resource:
	usb_put_hcd(hcd);
fail_hcd:
	clk_disable_unprepare(usb_host_clk);
fail_disable:
	isp1301_i2c_client = NULL;
	return ret;
}

static int ohci_hcd_nxp_remove(struct platform_device *pdev)
{
	struct usb_hcd *hcd = platform_get_drvdata(pdev);

	usb_remove_hcd(hcd);
	ohci_nxp_stop_hc();
	usb_put_hcd(hcd);
	clk_disable_unprepare(usb_host_clk);
	isp1301_i2c_client = NULL;

	return 0;
}

/* work with hotplug and coldplug */
MODULE_ALIAS("platform:usb-ohci");

#ifdef CONFIG_OF
static const struct of_device_id ohci_hcd_nxp_match[] = {
	{ .compatible = "nxp,ohci-nxp" },
	{},
};
MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
#endif

static struct platform_driver ohci_hcd_nxp_driver = {
	.driver = {
		.name = "usb-ohci",
		.of_match_table = of_match_ptr(ohci_hcd_nxp_match),
	},
	.probe = ohci_hcd_nxp_probe,
	.remove = ohci_hcd_nxp_remove,
};

static int __init ohci_nxp_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	pr_info("%s: " DRIVER_DESC "\n", hcd_name);

	ohci_init_driver(&ohci_nxp_hc_driver, NULL);
	return platform_driver_register(&ohci_hcd_nxp_driver);
}
module_init(ohci_nxp_init);

static void __exit ohci_nxp_cleanup(void)
{
	platform_driver_unregister(&ohci_hcd_nxp_driver);
}
module_exit(ohci_nxp_cleanup);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");
Commit	Line	Data
60bbfc84	1	/*
28643104	2	* driver for NXP USB Host devices
60bbfc84	3	*
28643104	4	* Currently supported OHCI host devices:
53dc25ad	5	* - NXP LPC32xx
60bbfc84 VW	6	*
60bbfc84 VW	7	* Authors: Dmitry Chigirev <source@mvista.com>
dd9048af	8	* Vitaly Wool <vitalywool@gmail.com>
60bbfc84 VW	9	*
	10	* register initialization is based on code examples provided by Philips
	11	* Copyright (c) 2005 Koninklijke Philips Electronics N.V.
	12	*
	13	* NOTE: This driver does not have suspend/resume functionality
	14	* This driver is intended for engineering development purposes only
	15	*
	16	* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
	17	* the terms of the GNU General Public License version 2. This program
	18	* is licensed "as is" without any warranty of any kind, whether express
	19	* or implied.
	20	*/
	21	#include <linux/clk.h>
30330b8f MG	22	#include <linux/dma-mapping.h>
30330b8f MG	23	#include <linux/io.h>
60bbfc84	24	#include <linux/i2c.h>
30330b8f	25	#include <linux/module.h>
2265efea	26	#include <linux/of.h>
30330b8f	27	#include <linux/platform_device.h>
73108aa9	28	#include <linux/usb/isp1301.h>
30330b8f MG	29	#include <linux/usb.h>
	30	#include <linux/usb/hcd.h>
	31
	32	#include "ohci.h"
	33
a09e64fb	34	#include <mach/hardware.h>
60bbfc84	35
53dc25ad	36	#define USB_CONFIG_BASE 0x31020000
53dc25ad	37	#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
60bbfc84 VW	38
	39	/* USB_OTG_STAT_CONTROL bit defines */
	40	#define TRANSPARENT_I2C_EN (1 << 7)
	41	#define HOST_EN (1 << 0)
	42
53dc25ad RS	43	/* On LPC32xx, those are undefined */
	44	#ifndef start_int_set_falling_edge
	45	#define start_int_set_falling_edge(irq)
	46	#define start_int_set_rising_edge(irq)
	47	#define start_int_ack(irq)
	48	#define start_int_mask(irq)
	49	#define start_int_umask(irq)
	50	#endif
	51
30330b8f MG	52	#define DRIVER_DESC "OHCI NXP driver"
	53
	54	static const char hcd_name[] = "ohci-nxp";
	55	static struct hc_driver __read_mostly ohci_nxp_hc_driver;
	56
09ce497e	57	static struct i2c_client *isp1301_i2c_client;
60bbfc84	58
83253b3b	59	static struct clk *usb_host_clk;
60bbfc84	60
53dc25ad RS	61	static void isp1301_configure_lpc32xx(void)
	62	{
	63	/* LPC32XX only supports DAT_SE0 USB mode */
	64	/* This sequence is important */
	65
	66	/* Disable transparent UART mode first */
	67	i2c_smbus_write_byte_data(isp1301_i2c_client,
	68	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	69	MC1_UART_EN);
	70	i2c_smbus_write_byte_data(isp1301_i2c_client,
	71	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	72	~MC1_SPEED_REG);
	73	i2c_smbus_write_byte_data(isp1301_i2c_client,
	74	ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	75	i2c_smbus_write_byte_data(isp1301_i2c_client,
	76	(ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR),
	77	~0);
	78	i2c_smbus_write_byte_data(isp1301_i2c_client,
	79	ISP1301_I2C_MODE_CONTROL_2,
	80	(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL));
	81	i2c_smbus_write_byte_data(isp1301_i2c_client,
	82	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	83	i2c_smbus_write_byte_data(isp1301_i2c_client,
	84	ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	85	i2c_smbus_write_byte_data(isp1301_i2c_client,
	86	ISP1301_I2C_OTG_CONTROL_1,
	87	(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN));
	88	i2c_smbus_write_byte_data(isp1301_i2c_client,
	89	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	90	(OTG1_DM_PULLUP \| OTG1_DP_PULLUP));
	91	i2c_smbus_write_byte_data(isp1301_i2c_client,
	92	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	93	i2c_smbus_write_byte_data(isp1301_i2c_client,
	94	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR,
	95	~0);
	96	i2c_smbus_write_byte_data(isp1301_i2c_client,
	97	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	98
53dc25ad RS	99	printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
	100	i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	101	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	102	i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	103	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	104	i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
	105	}
	106
	107	static void isp1301_configure(void)
	108	{
d684f05f	109	isp1301_configure_lpc32xx();
60bbfc84 VW	110	}
	111
	112	static inline void isp1301_vbus_on(void)
	113	{
a6a36008 RS	114	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
a6a36008 RS	115	OTG1_VBUS_DRV);
60bbfc84 VW	116	}
	117
	118	static inline void isp1301_vbus_off(void)
	119	{
a6a36008 RS	120	i2c_smbus_write_byte_data(isp1301_i2c_client,
	121	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR,
	122	OTG1_VBUS_DRV);
60bbfc84 VW	123	}
60bbfc84 VW	124
30330b8f	125	static void ohci_nxp_start_hc(void)
60bbfc84 VW	126	{
	127	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
	128	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	129	isp1301_vbus_on();
	130	}
	131
30330b8f	132	static void ohci_nxp_stop_hc(void)
60bbfc84 VW	133	{
	134	unsigned long tmp;
	135	isp1301_vbus_off();
	136	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
	137	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	138	}
	139
30330b8f	140	static int ohci_hcd_nxp_probe(struct platform_device *pdev)
60bbfc84 VW	141	{
60bbfc84 VW	142	struct usb_hcd *hcd = 0;
28643104	143	const struct hc_driver *driver = &ohci_nxp_hc_driver;
a6a99cf0	144	struct resource *res;
60bbfc84	145	int ret = 0, irq;
73108aa9 RS	146	struct device_node *isp1301_node;
	147
	148	if (pdev->dev.of_node) {
	149	isp1301_node = of_parse_phandle(pdev->dev.of_node,
	150	"transceiver", 0);
	151	} else {
	152	isp1301_node = NULL;
	153	}
	154
	155	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	156	if (!isp1301_i2c_client) {
b3517d5d	157	return -EPROBE_DEFER;
73108aa9	158	}
60bbfc84	159
e1fd7341	160	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	161	if (ret)
22d9d8e8 RK	162	goto fail_disable;
a6a99cf0	163
28643104	164	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
60bbfc84	165	if (usb_disabled()) {
b6c227ed	166	dev_err(&pdev->dev, "USB is disabled\n");
60bbfc84	167	ret = -ENODEV;
b3517d5d	168	goto fail_disable;
60bbfc84 VW	169	}
60bbfc84 VW	170
83253b3b VZ	171	/* Enable USB host clock */
	172	usb_host_clk = devm_clk_get(&pdev->dev, NULL);
	173	if (IS_ERR(usb_host_clk)) {
	174	dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
	175	ret = PTR_ERR(usb_host_clk);
ac8d81f3	176	goto fail_disable;
60bbfc84 VW	177	}
60bbfc84 VW	178
83253b3b	179	ret = clk_prepare_enable(usb_host_clk);
60bbfc84	180	if (ret < 0) {
83253b3b	181	dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
ac8d81f3	182	goto fail_disable;
60bbfc84 VW	183	}
60bbfc84 VW	184
78091dc2	185	isp1301_configure();
60bbfc84	186
a6a99cf0	187	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
60bbfc84	188	if (!hcd) {
b6c227ed	189	dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
60bbfc84	190	ret = -ENOMEM;
b3517d5d	191	goto fail_hcd;
60bbfc84 VW	192	}
60bbfc84 VW	193
a6a99cf0	194	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
148e1134 TR	195	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	196	if (IS_ERR(hcd->regs)) {
	197	ret = PTR_ERR(hcd->regs);
b3517d5d	198	goto fail_resource;
60bbfc84	199	}
a6a99cf0 RS	200	hcd->rsrc_start = res->start;
a6a99cf0 RS	201	hcd->rsrc_len = resource_size(res);
60bbfc84 VW	202
	203	irq = platform_get_irq(pdev, 0);
	204	if (irq < 0) {
	205	ret = -ENXIO;
b3517d5d	206	goto fail_resource;
60bbfc84 VW	207	}
60bbfc84 VW	208
30330b8f	209	ohci_nxp_start_hc();
60bbfc84	210	platform_set_drvdata(pdev, hcd);
60bbfc84 VW	211
60bbfc84 VW	212	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
b5dd18d8	213	ret = usb_add_hcd(hcd, irq, 0);
3c9740a1 PC	214	if (ret == 0) {
3c9740a1 PC	215	device_wakeup_enable(hcd->self.controller);
60bbfc84	216	return ret;
3c9740a1	217	}
60bbfc84	218
30330b8f	219	ohci_nxp_stop_hc();
b3517d5d	220	fail_resource:
60bbfc84	221	usb_put_hcd(hcd);
b3517d5d	222	fail_hcd:
83253b3b	223	clk_disable_unprepare(usb_host_clk);
b3517d5d	224	fail_disable:
3a407e73	225	isp1301_i2c_client = NULL;
60bbfc84 VW	226	return ret;
	227	}
	228
30330b8f	229	static int ohci_hcd_nxp_remove(struct platform_device *pdev)
60bbfc84 VW	230	{
	231	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	232
	233	usb_remove_hcd(hcd);
30330b8f	234	ohci_nxp_stop_hc();
60bbfc84	235	usb_put_hcd(hcd);
83253b3b	236	clk_disable_unprepare(usb_host_clk);
3a407e73	237	isp1301_i2c_client = NULL;
60bbfc84	238
60bbfc84 VW	239	return 0;
	240	}
	241
f4fce61d KS	242	/* work with hotplug and coldplug */
	243	MODULE_ALIAS("platform:usb-ohci");
	244
2265efea	245	#ifdef CONFIG_OF
30330b8f	246	static const struct of_device_id ohci_hcd_nxp_match[] = {
2265efea RS	247	{ .compatible = "nxp,ohci-nxp" },
	248	{},
	249	};
30330b8f	250	MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
2265efea RS	251	#endif
2265efea RS	252
30330b8f	253	static struct platform_driver ohci_hcd_nxp_driver = {
60bbfc84 VW	254	.driver = {
60bbfc84 VW	255	.name = "usb-ohci",
30330b8f	256	.of_match_table = of_match_ptr(ohci_hcd_nxp_match),
60bbfc84	257	},
30330b8f MG	258	.probe = ohci_hcd_nxp_probe,
30330b8f MG	259	.remove = ohci_hcd_nxp_remove,
60bbfc84 VW	260	};
60bbfc84 VW	261
30330b8f MG	262	static int __init ohci_nxp_init(void)
	263	{
	264	if (usb_disabled())
	265	return -ENODEV;
	266
	267	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	268
	269	ohci_init_driver(&ohci_nxp_hc_driver, NULL);
	270	return platform_driver_register(&ohci_hcd_nxp_driver);
	271	}
	272	module_init(ohci_nxp_init);
	273
	274	static void __exit ohci_nxp_cleanup(void)
	275	{
	276	platform_driver_unregister(&ohci_hcd_nxp_driver);
	277	}
	278	module_exit(ohci_nxp_cleanup);
	279
	280	MODULE_DESCRIPTION(DRIVER_DESC);
	281	MODULE_LICENSE("GPL v2");