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

// SPDX-License-Identifier: GPL-2.0
/*
 * 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.
 */
#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
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
60bbfc84	2	/*
28643104	3	* driver for NXP USB Host devices
60bbfc84	4	*
28643104	5	* Currently supported OHCI host devices:
53dc25ad	6	* - NXP LPC32xx
60bbfc84 VW	7	*
60bbfc84 VW	8	* Authors: Dmitry Chigirev <source@mvista.com>
dd9048af	9	* Vitaly Wool <vitalywool@gmail.com>
60bbfc84 VW	10	*
	11	* register initialization is based on code examples provided by Philips
	12	* Copyright (c) 2005 Koninklijke Philips Electronics N.V.
	13	*
	14	* NOTE: This driver does not have suspend/resume functionality
	15	* This driver is intended for engineering development purposes only
	16	*
ef1362d9	17	* 2005-2006 (c) MontaVista Software, Inc.
60bbfc84 VW	18	*/
60bbfc84 VW	19	#include <linux/clk.h>
30330b8f MG	20	#include <linux/dma-mapping.h>
30330b8f MG	21	#include <linux/io.h>
60bbfc84	22	#include <linux/i2c.h>
30330b8f	23	#include <linux/module.h>
2265efea	24	#include <linux/of.h>
30330b8f	25	#include <linux/platform_device.h>
73108aa9	26	#include <linux/usb/isp1301.h>
30330b8f MG	27	#include <linux/usb.h>
	28	#include <linux/usb/hcd.h>
	29
	30	#include "ohci.h"
	31
a09e64fb	32	#include <mach/hardware.h>
60bbfc84	33
53dc25ad	34	#define USB_CONFIG_BASE 0x31020000
53dc25ad	35	#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
60bbfc84 VW	36
	37	/* USB_OTG_STAT_CONTROL bit defines */
	38	#define TRANSPARENT_I2C_EN (1 << 7)
	39	#define HOST_EN (1 << 0)
	40
53dc25ad RS	41	/* On LPC32xx, those are undefined */
	42	#ifndef start_int_set_falling_edge
	43	#define start_int_set_falling_edge(irq)
	44	#define start_int_set_rising_edge(irq)
	45	#define start_int_ack(irq)
	46	#define start_int_mask(irq)
	47	#define start_int_umask(irq)
	48	#endif
	49
30330b8f MG	50	#define DRIVER_DESC "OHCI NXP driver"
	51
	52	static const char hcd_name[] = "ohci-nxp";
	53	static struct hc_driver __read_mostly ohci_nxp_hc_driver;
	54
09ce497e	55	static struct i2c_client *isp1301_i2c_client;
60bbfc84	56
83253b3b	57	static struct clk *usb_host_clk;
60bbfc84	58
53dc25ad RS	59	static void isp1301_configure_lpc32xx(void)
	60	{
	61	/* LPC32XX only supports DAT_SE0 USB mode */
	62	/* This sequence is important */
	63
	64	/* Disable transparent UART mode first */
	65	i2c_smbus_write_byte_data(isp1301_i2c_client,
	66	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	67	MC1_UART_EN);
	68	i2c_smbus_write_byte_data(isp1301_i2c_client,
	69	(ISP1301_I2C_MODE_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	70	~MC1_SPEED_REG);
	71	i2c_smbus_write_byte_data(isp1301_i2c_client,
	72	ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
	73	i2c_smbus_write_byte_data(isp1301_i2c_client,
	74	(ISP1301_I2C_MODE_CONTROL_2 \| ISP1301_I2C_REG_CLEAR_ADDR),
	75	~0);
	76	i2c_smbus_write_byte_data(isp1301_i2c_client,
	77	ISP1301_I2C_MODE_CONTROL_2,
	78	(MC2_BI_DI \| MC2_PSW_EN \| MC2_SPD_SUSP_CTRL));
	79	i2c_smbus_write_byte_data(isp1301_i2c_client,
	80	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR), ~0);
	81	i2c_smbus_write_byte_data(isp1301_i2c_client,
	82	ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
	83	i2c_smbus_write_byte_data(isp1301_i2c_client,
	84	ISP1301_I2C_OTG_CONTROL_1,
	85	(OTG1_DM_PULLDOWN \| OTG1_DP_PULLDOWN));
	86	i2c_smbus_write_byte_data(isp1301_i2c_client,
	87	(ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR),
	88	(OTG1_DM_PULLUP \| OTG1_DP_PULLUP));
	89	i2c_smbus_write_byte_data(isp1301_i2c_client,
	90	ISP1301_I2C_INTERRUPT_LATCH \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	91	i2c_smbus_write_byte_data(isp1301_i2c_client,
	92	ISP1301_I2C_INTERRUPT_FALLING \| ISP1301_I2C_REG_CLEAR_ADDR,
	93	~0);
	94	i2c_smbus_write_byte_data(isp1301_i2c_client,
	95	ISP1301_I2C_INTERRUPT_RISING \| ISP1301_I2C_REG_CLEAR_ADDR, ~0);
	96
53dc25ad RS	97	printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
	98	i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
	99	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
	100	i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
	101	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
	102	i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
	103	}
	104
	105	static void isp1301_configure(void)
	106	{
d684f05f	107	isp1301_configure_lpc32xx();
60bbfc84 VW	108	}
	109
	110	static inline void isp1301_vbus_on(void)
	111	{
a6a36008 RS	112	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
a6a36008 RS	113	OTG1_VBUS_DRV);
60bbfc84 VW	114	}
	115
	116	static inline void isp1301_vbus_off(void)
	117	{
a6a36008 RS	118	i2c_smbus_write_byte_data(isp1301_i2c_client,
	119	ISP1301_I2C_OTG_CONTROL_1 \| ISP1301_I2C_REG_CLEAR_ADDR,
	120	OTG1_VBUS_DRV);
60bbfc84 VW	121	}
60bbfc84 VW	122
30330b8f	123	static void ohci_nxp_start_hc(void)
60bbfc84 VW	124	{
60bbfc84 VW	125	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) \| HOST_EN;
5c5a94a5	126
60bbfc84 VW	127	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
	128	isp1301_vbus_on();
	129	}
	130
30330b8f	131	static void ohci_nxp_stop_hc(void)
60bbfc84 VW	132	{
60bbfc84 VW	133	unsigned long tmp;
5c5a94a5	134
60bbfc84 VW	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);
5c5a94a5	156	if (!isp1301_i2c_client)
b3517d5d	157	return -EPROBE_DEFER;
60bbfc84	158
e1fd7341	159	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
22d9d8e8 RK	160	if (ret)
22d9d8e8 RK	161	goto fail_disable;
a6a99cf0	162
28643104	163	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
60bbfc84	164	if (usb_disabled()) {
b6c227ed	165	dev_err(&pdev->dev, "USB is disabled\n");
60bbfc84	166	ret = -ENODEV;
b3517d5d	167	goto fail_disable;
60bbfc84 VW	168	}
60bbfc84 VW	169
83253b3b VZ	170	/* Enable USB host clock */
	171	usb_host_clk = devm_clk_get(&pdev->dev, NULL);
	172	if (IS_ERR(usb_host_clk)) {
	173	dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
	174	ret = PTR_ERR(usb_host_clk);
ac8d81f3	175	goto fail_disable;
60bbfc84 VW	176	}
60bbfc84 VW	177
83253b3b	178	ret = clk_prepare_enable(usb_host_clk);
60bbfc84	179	if (ret < 0) {
83253b3b	180	dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
ac8d81f3	181	goto fail_disable;
60bbfc84 VW	182	}
60bbfc84 VW	183
78091dc2	184	isp1301_configure();
60bbfc84	185
a6a99cf0	186	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
60bbfc84	187	if (!hcd) {
b6c227ed	188	dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
60bbfc84	189	ret = -ENOMEM;
b3517d5d	190	goto fail_hcd;
60bbfc84 VW	191	}
60bbfc84 VW	192
a6a99cf0	193	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
148e1134 TR	194	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	195	if (IS_ERR(hcd->regs)) {
	196	ret = PTR_ERR(hcd->regs);
b3517d5d	197	goto fail_resource;
60bbfc84	198	}
a6a99cf0 RS	199	hcd->rsrc_start = res->start;
a6a99cf0 RS	200	hcd->rsrc_len = resource_size(res);
60bbfc84 VW	201
	202	irq = platform_get_irq(pdev, 0);
	203	if (irq < 0) {
	204	ret = -ENXIO;
b3517d5d	205	goto fail_resource;
60bbfc84 VW	206	}
60bbfc84 VW	207
30330b8f	208	ohci_nxp_start_hc();
60bbfc84	209	platform_set_drvdata(pdev, hcd);
60bbfc84 VW	210
60bbfc84 VW	211	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
b5dd18d8	212	ret = usb_add_hcd(hcd, irq, 0);
3c9740a1 PC	213	if (ret == 0) {
3c9740a1 PC	214	device_wakeup_enable(hcd->self.controller);
60bbfc84	215	return ret;
3c9740a1	216	}
60bbfc84	217
30330b8f	218	ohci_nxp_stop_hc();
b3517d5d	219	fail_resource:
60bbfc84	220	usb_put_hcd(hcd);
b3517d5d	221	fail_hcd:
83253b3b	222	clk_disable_unprepare(usb_host_clk);
b3517d5d	223	fail_disable:
3a407e73	224	isp1301_i2c_client = NULL;
60bbfc84 VW	225	return ret;
	226	}
	227
30330b8f	228	static int ohci_hcd_nxp_remove(struct platform_device *pdev)
60bbfc84 VW	229	{
	230	struct usb_hcd *hcd = platform_get_drvdata(pdev);
	231
	232	usb_remove_hcd(hcd);
30330b8f	233	ohci_nxp_stop_hc();
60bbfc84	234	usb_put_hcd(hcd);
83253b3b	235	clk_disable_unprepare(usb_host_clk);
3a407e73	236	isp1301_i2c_client = NULL;
60bbfc84	237
60bbfc84 VW	238	return 0;
	239	}
	240
f4fce61d KS	241	/* work with hotplug and coldplug */
	242	MODULE_ALIAS("platform:usb-ohci");
	243
2265efea	244	#ifdef CONFIG_OF
30330b8f	245	static const struct of_device_id ohci_hcd_nxp_match[] = {
2265efea RS	246	{ .compatible = "nxp,ohci-nxp" },
	247	{},
	248	};
30330b8f	249	MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
2265efea RS	250	#endif
2265efea RS	251
30330b8f	252	static struct platform_driver ohci_hcd_nxp_driver = {
60bbfc84 VW	253	.driver = {
60bbfc84 VW	254	.name = "usb-ohci",
30330b8f	255	.of_match_table = of_match_ptr(ohci_hcd_nxp_match),
60bbfc84	256	},
30330b8f MG	257	.probe = ohci_hcd_nxp_probe,
30330b8f MG	258	.remove = ohci_hcd_nxp_remove,
60bbfc84 VW	259	};
60bbfc84 VW	260
30330b8f MG	261	static int __init ohci_nxp_init(void)
	262	{
	263	if (usb_disabled())
	264	return -ENODEV;
	265
	266	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
	267
	268	ohci_init_driver(&ohci_nxp_hc_driver, NULL);
	269	return platform_driver_register(&ohci_hcd_nxp_driver);
	270	}
	271	module_init(ohci_nxp_init);
	272
	273	static void __exit ohci_nxp_cleanup(void)
	274	{
	275	platform_driver_unregister(&ohci_hcd_nxp_driver);
	276	}
	277	module_exit(ohci_nxp_cleanup);
	278
	279	MODULE_DESCRIPTION(DRIVER_DESC);
	280	MODULE_LICENSE("GPL v2");