[net-next-2.6.git] / drivers / usb / serial / qcserial.c

/*
 * Qualcomm Serial USB driver
 *
 *	Copyright (c) 2008 QUALCOMM Incorporated.
 *	Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
 *	Copyright (c) 2009 Novell Inc.
 *
 *	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/tty.h>
#include <linux/tty_flip.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/slab.h>
#include "usb-wwan.h"

#define DRIVER_AUTHOR "Qualcomm Inc"
#define DRIVER_DESC "Qualcomm USB Serial driver"

static int debug;

static const struct usb_device_id id_table[] = {
	{USB_DEVICE(0x05c6, 0x9211)},	/* Acer Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
	{USB_DEVICE(0x03f0, 0x1f1d)},	/* HP un2400 Gobi Modem Device */
	{USB_DEVICE(0x03f0, 0x201d)},	/* HP un2400 Gobi QDL Device */
	{USB_DEVICE(0x04da, 0x250d)},	/* Panasonic Gobi Modem device */
	{USB_DEVICE(0x04da, 0x250c)},	/* Panasonic Gobi QDL device */
	{USB_DEVICE(0x413c, 0x8172)},	/* Dell Gobi Modem device */
	{USB_DEVICE(0x413c, 0x8171)},	/* Dell Gobi QDL device */
	{USB_DEVICE(0x1410, 0xa001)},	/* Novatel Gobi Modem device */
	{USB_DEVICE(0x1410, 0xa008)},	/* Novatel Gobi QDL device */
	{USB_DEVICE(0x0b05, 0x1776)},	/* Asus Gobi Modem device */
	{USB_DEVICE(0x0b05, 0x1774)},	/* Asus Gobi QDL device */
	{USB_DEVICE(0x19d2, 0xfff3)},	/* ONDA Gobi Modem device */
	{USB_DEVICE(0x19d2, 0xfff2)},	/* ONDA Gobi QDL device */
	{USB_DEVICE(0x1557, 0x0a80)},	/* OQO Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
	{USB_DEVICE(0x05c6, 0x9002)},	/* Generic Gobi Modem device */
	{USB_DEVICE(0x05c6, 0x9202)},	/* Generic Gobi Modem device */
	{USB_DEVICE(0x05c6, 0x9203)},	/* Generic Gobi Modem device */
	{USB_DEVICE(0x05c6, 0x9222)},	/* Generic Gobi Modem device */
	{USB_DEVICE(0x05c6, 0x9008)},	/* Generic Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9201)},	/* Generic Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9221)},	/* Generic Gobi QDL device */
	{USB_DEVICE(0x05c6, 0x9231)},	/* Generic Gobi QDL device */
	{USB_DEVICE(0x1f45, 0x0001)},	/* Unknown Gobi QDL device */
	{USB_DEVICE(0x413c, 0x8185)},	/* Dell Gobi 2000 QDL device (N0218, VU936) */
	{USB_DEVICE(0x413c, 0x8186)},	/* Dell Gobi 2000 Modem device (N0218, VU936) */
	{USB_DEVICE(0x05c6, 0x9208)},	/* Generic Gobi 2000 QDL device */
	{USB_DEVICE(0x05c6, 0x920b)},	/* Generic Gobi 2000 Modem device */
	{USB_DEVICE(0x05c6, 0x9224)},	/* Sony Gobi 2000 QDL device (N0279, VU730) */
	{USB_DEVICE(0x05c6, 0x9225)},	/* Sony Gobi 2000 Modem device (N0279, VU730) */
	{USB_DEVICE(0x05c6, 0x9244)},	/* Samsung Gobi 2000 QDL device (VL176) */
	{USB_DEVICE(0x05c6, 0x9245)},	/* Samsung Gobi 2000 Modem device (VL176) */
	{USB_DEVICE(0x03f0, 0x241d)},	/* HP Gobi 2000 QDL device (VP412) */
	{USB_DEVICE(0x03f0, 0x251d)},	/* HP Gobi 2000 Modem device (VP412) */
	{USB_DEVICE(0x05c6, 0x9214)},	/* Acer Gobi 2000 QDL device (VP413) */
	{USB_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */
	{USB_DEVICE(0x05c6, 0x9264)},	/* Asus Gobi 2000 QDL device (VR305) */
	{USB_DEVICE(0x05c6, 0x9265)},	/* Asus Gobi 2000 Modem device (VR305) */
	{USB_DEVICE(0x05c6, 0x9234)},	/* Top Global Gobi 2000 QDL device (VR306) */
	{USB_DEVICE(0x05c6, 0x9235)},	/* Top Global Gobi 2000 Modem device (VR306) */
	{USB_DEVICE(0x05c6, 0x9274)},	/* iRex Technologies Gobi 2000 QDL device (VR307) */
	{USB_DEVICE(0x05c6, 0x9275)},	/* iRex Technologies Gobi 2000 Modem device (VR307) */
	{USB_DEVICE(0x1199, 0x9000)},	/* Sierra Wireless Gobi 2000 QDL device (VT773) */
	{USB_DEVICE(0x1199, 0x9001)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9002)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9003)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9004)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9005)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9006)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9007)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9008)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x9009)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x1199, 0x900a)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
	{USB_DEVICE(0x16d8, 0x8001)},	/* CMDTech Gobi 2000 QDL device (VU922) */
	{USB_DEVICE(0x16d8, 0x8002)},	/* CMDTech Gobi 2000 Modem device (VU922) */
	{USB_DEVICE(0x05c6, 0x9204)},	/* Gobi 2000 QDL device */
	{USB_DEVICE(0x05c6, 0x9205)},	/* Gobi 2000 Modem device */
	{ }				/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_driver qcdriver = {
	.name			= "qcserial",
	.probe			= usb_serial_probe,
	.disconnect		= usb_serial_disconnect,
	.id_table		= id_table,
	.suspend		= usb_serial_suspend,
	.resume			= usb_serial_resume,
	.supports_autosuspend	= true,
};

static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
{
	struct usb_wwan_intf_private *data;
	struct usb_host_interface *intf = serial->interface->cur_altsetting;
	int retval = -ENODEV;
	__u8 nintf;
	__u8 ifnum;

	dbg("%s", __func__);

	nintf = serial->dev->actconfig->desc.bNumInterfaces;
	dbg("Num Interfaces = %d", nintf);
	ifnum = intf->desc.bInterfaceNumber;
	dbg("This Interface = %d", ifnum);

	data = serial->private = kzalloc(sizeof(struct usb_wwan_intf_private),
					 GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	spin_lock_init(&data->susp_lock);

	switch (nintf) {
	case 1:
		/* QDL mode */
		/* Gobi 2000 has a single altsetting, older ones have two */
		if (serial->interface->num_altsetting == 2)
			intf = &serial->interface->altsetting[1];
		else if (serial->interface->num_altsetting > 2)
			break;

		if (intf->desc.bNumEndpoints == 2 &&
		    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
		    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
			dbg("QDL port found");

			if (serial->interface->num_altsetting == 1)
				return 0;

			retval = usb_set_interface(serial->dev, ifnum, 1);
			if (retval < 0) {
				dev_err(&serial->dev->dev,
					"Could not set interface, error %d\n",
					retval);
				retval = -ENODEV;
				kfree(data);
			}
			return retval;
		}
		break;

	case 3:
	case 4:
		/* Composite mode */
		if (ifnum == 2) {
			dbg("Modem port found");
			retval = usb_set_interface(serial->dev, ifnum, 0);
			if (retval < 0) {
				dev_err(&serial->dev->dev,
					"Could not set interface, error %d\n",
					retval);
				retval = -ENODEV;
				kfree(data);
			}
			return retval;
		}
		break;

	default:
		dev_err(&serial->dev->dev,
			"unknown number of interfaces: %d\n", nintf);
		kfree(data);
		return -ENODEV;
	}

	return retval;
}

static struct usb_serial_driver qcdevice = {
	.driver = {
		.owner     = THIS_MODULE,
		.name      = "qcserial",
	},
	.description         = "Qualcomm USB modem",
	.id_table            = id_table,
	.usb_driver          = &qcdriver,
	.num_ports           = 1,
	.probe               = qcprobe,
	.open		     = usb_wwan_open,
	.close		     = usb_wwan_close,
	.write		     = usb_wwan_write,
	.write_room	     = usb_wwan_write_room,
	.chars_in_buffer     = usb_wwan_chars_in_buffer,
	.attach		     = usb_wwan_startup,
	.disconnect	     = usb_wwan_disconnect,
	.release	     = usb_wwan_release,
#ifdef CONFIG_PM
	.suspend	     = usb_wwan_suspend,
	.resume		     = usb_wwan_resume,
#endif
};

static int __init qcinit(void)
{
	int retval;

	retval = usb_serial_register(&qcdevice);
	if (retval)
		return retval;

	retval = usb_register(&qcdriver);
	if (retval) {
		usb_serial_deregister(&qcdevice);
		return retval;
	}

	return 0;
}

static void __exit qcexit(void)
{
	usb_deregister(&qcdriver);
	usb_serial_deregister(&qcdevice);
}

module_init(qcinit);
module_exit(qcexit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL v2");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
Commit	Line	Data
a78b4282 GKH	1	/*
	2	* Qualcomm Serial USB driver
	3	*
	4	* Copyright (c) 2008 QUALCOMM Incorporated.
	5	* Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
	6	* Copyright (c) 2009 Novell Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License version
	10	* 2 as published by the Free Software Foundation.
	11	*
	12	*/
	13
	14	#include <linux/tty.h>
	15	#include <linux/tty_flip.h>
	16	#include <linux/usb.h>
	17	#include <linux/usb/serial.h>
3d7e59ad MG	18	#include <linux/slab.h>
3d7e59ad MG	19	#include "usb-wwan.h"
a78b4282 GKH	20
	21	#define DRIVER_AUTHOR "Qualcomm Inc"
	22	#define DRIVER_DESC "Qualcomm USB Serial driver"
	23
	24	static int debug;
	25
7d40d7e8	26	static const struct usb_device_id id_table[] = {
a78b4282 GKH	27	{USB_DEVICE(0x05c6, 0x9211)}, /* Acer Gobi QDL device */
a78b4282 GKH	28	{USB_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
fd8345f8 AS	29	{USB_DEVICE(0x03f0, 0x1f1d)}, /* HP un2400 Gobi Modem Device */
fd8345f8 AS	30	{USB_DEVICE(0x03f0, 0x201d)}, /* HP un2400 Gobi QDL Device */
f05932c0 MG	31	{USB_DEVICE(0x04da, 0x250d)}, /* Panasonic Gobi Modem device */
	32	{USB_DEVICE(0x04da, 0x250c)}, /* Panasonic Gobi QDL device */
	33	{USB_DEVICE(0x413c, 0x8172)}, /* Dell Gobi Modem device */
	34	{USB_DEVICE(0x413c, 0x8171)}, /* Dell Gobi QDL device */
	35	{USB_DEVICE(0x1410, 0xa001)}, /* Novatel Gobi Modem device */
	36	{USB_DEVICE(0x1410, 0xa008)}, /* Novatel Gobi QDL device */
	37	{USB_DEVICE(0x0b05, 0x1776)}, /* Asus Gobi Modem device */
	38	{USB_DEVICE(0x0b05, 0x1774)}, /* Asus Gobi QDL device */
	39	{USB_DEVICE(0x19d2, 0xfff3)}, /* ONDA Gobi Modem device */
	40	{USB_DEVICE(0x19d2, 0xfff2)}, /* ONDA Gobi QDL device */
	41	{USB_DEVICE(0x1557, 0x0a80)}, /* OQO Gobi QDL device */
	42	{USB_DEVICE(0x05c6, 0x9001)}, /* Generic Gobi Modem device */
	43	{USB_DEVICE(0x05c6, 0x9002)}, /* Generic Gobi Modem device */
	44	{USB_DEVICE(0x05c6, 0x9202)}, /* Generic Gobi Modem device */
	45	{USB_DEVICE(0x05c6, 0x9203)}, /* Generic Gobi Modem device */
	46	{USB_DEVICE(0x05c6, 0x9222)}, /* Generic Gobi Modem device */
	47	{USB_DEVICE(0x05c6, 0x9008)}, /* Generic Gobi QDL device */
	48	{USB_DEVICE(0x05c6, 0x9201)}, /* Generic Gobi QDL device */
	49	{USB_DEVICE(0x05c6, 0x9221)}, /* Generic Gobi QDL device */
	50	{USB_DEVICE(0x05c6, 0x9231)}, /* Generic Gobi QDL device */
	51	{USB_DEVICE(0x1f45, 0x0001)}, /* Unknown Gobi QDL device */
0725e95e BR	52	{USB_DEVICE(0x413c, 0x8185)}, /* Dell Gobi 2000 QDL device (N0218, VU936) */
0725e95e BR	53	{USB_DEVICE(0x413c, 0x8186)}, /* Dell Gobi 2000 Modem device (N0218, VU936) */
bec25b89 AB	54	{USB_DEVICE(0x05c6, 0x9208)}, /* Generic Gobi 2000 QDL device */
bec25b89 AB	55	{USB_DEVICE(0x05c6, 0x920b)}, /* Generic Gobi 2000 Modem device */
0725e95e BR	56	{USB_DEVICE(0x05c6, 0x9224)}, /* Sony Gobi 2000 QDL device (N0279, VU730) */
	57	{USB_DEVICE(0x05c6, 0x9225)}, /* Sony Gobi 2000 Modem device (N0279, VU730) */
	58	{USB_DEVICE(0x05c6, 0x9244)}, /* Samsung Gobi 2000 QDL device (VL176) */
	59	{USB_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
	60	{USB_DEVICE(0x03f0, 0x241d)}, /* HP Gobi 2000 QDL device (VP412) */
	61	{USB_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
	62	{USB_DEVICE(0x05c6, 0x9214)}, /* Acer Gobi 2000 QDL device (VP413) */
	63	{USB_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
	64	{USB_DEVICE(0x05c6, 0x9264)}, /* Asus Gobi 2000 QDL device (VR305) */
	65	{USB_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
	66	{USB_DEVICE(0x05c6, 0x9234)}, /* Top Global Gobi 2000 QDL device (VR306) */
	67	{USB_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
	68	{USB_DEVICE(0x05c6, 0x9274)}, /* iRex Technologies Gobi 2000 QDL device (VR307) */
	69	{USB_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
	70	{USB_DEVICE(0x1199, 0x9000)}, /* Sierra Wireless Gobi 2000 QDL device (VT773) */
	71	{USB_DEVICE(0x1199, 0x9001)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	72	{USB_DEVICE(0x1199, 0x9002)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	73	{USB_DEVICE(0x1199, 0x9003)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	74	{USB_DEVICE(0x1199, 0x9004)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	75	{USB_DEVICE(0x1199, 0x9005)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	76	{USB_DEVICE(0x1199, 0x9006)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	77	{USB_DEVICE(0x1199, 0x9007)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	78	{USB_DEVICE(0x1199, 0x9008)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	79	{USB_DEVICE(0x1199, 0x9009)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	80	{USB_DEVICE(0x1199, 0x900a)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
	81	{USB_DEVICE(0x16d8, 0x8001)}, /* CMDTech Gobi 2000 QDL device (VU922) */
	82	{USB_DEVICE(0x16d8, 0x8002)}, /* CMDTech Gobi 2000 Modem device (VU922) */
e07896e6 AH	83	{USB_DEVICE(0x05c6, 0x9204)}, /* Gobi 2000 QDL device */
e07896e6 AH	84	{USB_DEVICE(0x05c6, 0x9205)}, /* Gobi 2000 Modem device */
a78b4282 GKH	85	{ } /* Terminating entry */
	86	};
	87	MODULE_DEVICE_TABLE(usb, id_table);
	88
	89	static struct usb_driver qcdriver = {
	90	.name = "qcserial",
	91	.probe = usb_serial_probe,
	92	.disconnect = usb_serial_disconnect,
	93	.id_table = id_table,
	94	.suspend = usb_serial_suspend,
	95	.resume = usb_serial_resume,
	96	.supports_autosuspend = true,
	97	};
	98
	99	static int qcprobe(struct usb_serial serial, const struct usb_device_id id)
	100	{
3d7e59ad	101	struct usb_wwan_intf_private *data;
e07896e6	102	struct usb_host_interface *intf = serial->interface->cur_altsetting;
a78b4282 GKH	103	int retval = -ENODEV;
	104	__u8 nintf;
	105	__u8 ifnum;
	106
	107	dbg("%s", __func__);
	108
	109	nintf = serial->dev->actconfig->desc.bNumInterfaces;
	110	dbg("Num Interfaces = %d", nintf);
e07896e6	111	ifnum = intf->desc.bInterfaceNumber;
a78b4282 GKH	112	dbg("This Interface = %d", ifnum);
a78b4282 GKH	113
3d7e59ad MG	114	data = serial->private = kzalloc(sizeof(struct usb_wwan_intf_private),
	115	GFP_KERNEL);
	116	if (!data)
	117	return -ENOMEM;
	118
	119	spin_lock_init(&data->susp_lock);
	120
a78b4282 GKH	121	switch (nintf) {
	122	case 1:
	123	/* QDL mode */
e07896e6 AH	124	/* Gobi 2000 has a single altsetting, older ones have two */
e07896e6 AH	125	if (serial->interface->num_altsetting == 2)
a78b4282	126	intf = &serial->interface->altsetting[1];
e07896e6 AH	127	else if (serial->interface->num_altsetting > 2)
	128	break;
	129
	130	if (intf->desc.bNumEndpoints == 2 &&
	131	usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
	132	usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
	133	dbg("QDL port found");
	134
	135	if (serial->interface->num_altsetting == 1)
	136	return 0;
	137
	138	retval = usb_set_interface(serial->dev, ifnum, 1);
	139	if (retval < 0) {
	140	dev_err(&serial->dev->dev,
	141	"Could not set interface, error %d\n",
	142	retval);
	143	retval = -ENODEV;
0d152de5	144	kfree(data);
a78b4282	145	}
e07896e6	146	return retval;
a78b4282 GKH	147	}
	148	break;
	149
e07896e6	150	case 3:
a78b4282 GKH	151	case 4:
	152	/* Composite mode */
	153	if (ifnum == 2) {
	154	dbg("Modem port found");
	155	retval = usb_set_interface(serial->dev, ifnum, 0);
	156	if (retval < 0) {
	157	dev_err(&serial->dev->dev,
	158	"Could not set interface, error %d\n",
	159	retval);
	160	retval = -ENODEV;
0d152de5	161	kfree(data);
a78b4282 GKH	162	}
	163	return retval;
	164	}
	165	break;
	166
	167	default:
	168	dev_err(&serial->dev->dev,
	169	"unknown number of interfaces: %d\n", nintf);
0d152de5	170	kfree(data);
a78b4282 GKH	171	return -ENODEV;
	172	}
	173
	174	return retval;
	175	}
	176
	177	static struct usb_serial_driver qcdevice = {
	178	.driver = {
	179	.owner = THIS_MODULE,
	180	.name = "qcserial",
	181	},
	182	.description = "Qualcomm USB modem",
	183	.id_table = id_table,
	184	.usb_driver = &qcdriver,
	185	.num_ports = 1,
	186	.probe = qcprobe,
3d7e59ad MG	187	.open = usb_wwan_open,
	188	.close = usb_wwan_close,
	189	.write = usb_wwan_write,
	190	.write_room = usb_wwan_write_room,
	191	.chars_in_buffer = usb_wwan_chars_in_buffer,
	192	.attach = usb_wwan_startup,
	193	.disconnect = usb_wwan_disconnect,
	194	.release = usb_wwan_release,
	195	#ifdef CONFIG_PM
	196	.suspend = usb_wwan_suspend,
	197	.resume = usb_wwan_resume,
	198	#endif
a78b4282 GKH	199	};
	200
	201	static int __init qcinit(void)
	202	{
	203	int retval;
	204
	205	retval = usb_serial_register(&qcdevice);
	206	if (retval)
	207	return retval;
	208
	209	retval = usb_register(&qcdriver);
	210	if (retval) {
	211	usb_serial_deregister(&qcdevice);
	212	return retval;
	213	}
	214
	215	return 0;
	216	}
	217
	218	static void __exit qcexit(void)
	219	{
	220	usb_deregister(&qcdriver);
	221	usb_serial_deregister(&qcdevice);
	222	}
	223
	224	module_init(qcinit);
	225	module_exit(qcexit);
	226
	227	MODULE_AUTHOR(DRIVER_AUTHOR);
	228	MODULE_DESCRIPTION(DRIVER_DESC);
	229	MODULE_LICENSE("GPL v2");
	230
	231	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	232	MODULE_PARM_DESC(debug, "Debug enabled or not");