[linux-2.6-block.git] / drivers / usb / serial / airprime.c

/*
 * AirPrime CDMA Wireless Serial USB driver
 *
 * Copyright (C) 2005-2006 Greg Kroah-Hartman <gregkh@suse.de>
 *
 *	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/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>

static struct usb_device_id id_table [] = {
	{ USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

#define URB_TRANSFER_BUFFER_SIZE	4096
#define NUM_READ_URBS			4
#define NUM_WRITE_URBS			4
#define NUM_BULK_EPS			3
#define MAX_BULK_EPS			6

/* if overridden by the user, then use their value for the size of the
 * read and write urbs, and the number of endpoints */
static int buffer_size = URB_TRANSFER_BUFFER_SIZE;
static int endpoints = NUM_BULK_EPS;
static int debug;
struct airprime_private {
	spinlock_t lock;
	int outstanding_urbs;
	int throttled;
	struct urb *read_urbp[NUM_READ_URBS];

	/* Settings for the port */
	int rts_state;	/* Handshaking pins (outputs) */
	int dtr_state;
	int cts_state;	/* Handshaking pins (inputs) */
	int dsr_state;
	int dcd_state;
	int ri_state;
};

static int airprime_send_setup(struct usb_serial_port *port)
{
	struct usb_serial *serial = port->serial;
	struct airprime_private *priv;

	dbg("%s", __func__);

	if (port->number != 0)
		return 0;

	priv = usb_get_serial_port_data(port);

	if (port->tty) {
		int val = 0;
		if (priv->dtr_state)
			val |= 0x01;
		if (priv->rts_state)
			val |= 0x02;

		return usb_control_msg(serial->dev,
					usb_rcvctrlpipe(serial->dev, 0),
					0x22, 0x21, val, 0, NULL, 0,
					USB_CTRL_SET_TIMEOUT);
	}

	return 0;
}

static void airprime_read_bulk_callback(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	unsigned char *data = urb->transfer_buffer;
	struct tty_struct *tty;
	int result;
	int status = urb->status;

	dbg("%s - port %d", __func__, port->number);

	if (status) {
		dbg("%s - nonzero read bulk status received: %d",
		    __func__, status);
		return;
	}
	usb_serial_debug_data(debug, &port->dev, __func__,
						urb->actual_length, data);

	tty = port->tty;
	if (tty && urb->actual_length) {
		tty_insert_flip_string(tty, data, urb->actual_length);
		tty_flip_buffer_push(tty);
	}

	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_err(&port->dev,
			"%s - failed resubmitting read urb, error %d\n",
			__func__, result);
	return;
}

static void airprime_write_bulk_callback(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	struct airprime_private *priv = usb_get_serial_port_data(port);
	int status = urb->status;
	unsigned long flags;

	dbg("%s - port %d", __func__, port->number);

	/* free up the transfer buffer, as usb_free_urb() does not do this */
	kfree(urb->transfer_buffer);

	if (status)
		dbg("%s - nonzero write bulk status received: %d",
		    __func__, status);
	spin_lock_irqsave(&priv->lock, flags);
	--priv->outstanding_urbs;
	spin_unlock_irqrestore(&priv->lock, flags);

	usb_serial_port_softint(port);
}

static int airprime_open(struct usb_serial_port *port, struct file *filp)
{
	struct airprime_private *priv = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;
	struct urb *urb;
	char *buffer = NULL;
	int i;
	int result = 0;

	dbg("%s - port %d", __func__, port->number);

	/* initialize our private data structure if it isn't already created */
	if (!priv) {
		priv = kzalloc(sizeof(*priv), GFP_KERNEL);
		if (!priv) {
			result = -ENOMEM;
			goto out;
		}
		spin_lock_init(&priv->lock);
		usb_set_serial_port_data(port, priv);
	}

	/* Set some sane defaults */
	priv->rts_state = 1;
	priv->dtr_state = 1;

	for (i = 0; i < NUM_READ_URBS; ++i) {
		buffer = kmalloc(buffer_size, GFP_KERNEL);
		if (!buffer) {
			dev_err(&port->dev, "%s - out of memory.\n",
				__func__);
			result = -ENOMEM;
			goto errout;
		}
		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb) {
			kfree(buffer);
			dev_err(&port->dev, "%s - no more urbs?\n",
				__func__);
			result = -ENOMEM;
			goto errout;
		}
		usb_fill_bulk_urb(urb, serial->dev,
				  usb_rcvbulkpipe(serial->dev,
					  port->bulk_out_endpointAddress),
				  buffer, buffer_size,
				  airprime_read_bulk_callback, port);
		result = usb_submit_urb(urb, GFP_KERNEL);
		if (result) {
			usb_free_urb(urb);
			kfree(buffer);
			dev_err(&port->dev,
				"%s - failed submitting read urb %d for port %d, error %d\n",
				__func__, i, port->number, result);
			goto errout;
		}
		/* remember this urb so we can kill it when the
		   port is closed */
		priv->read_urbp[i] = urb;
	}

	airprime_send_setup(port);

	goto out;

 errout:
	/* some error happened, cancel any submitted urbs and clean up
	   anything that got allocated successfully */

	while (i-- != 0) {
		urb = priv->read_urbp[i];
		buffer = urb->transfer_buffer;
		usb_kill_urb(urb);
		usb_free_urb(urb);
		kfree(buffer);
	}

 out:
	return result;
}

static void airprime_close(struct usb_serial_port *port, struct file *filp)
{
	struct airprime_private *priv = usb_get_serial_port_data(port);
	int i;

	dbg("%s - port %d", __func__, port->number);

	priv->rts_state = 0;
	priv->dtr_state = 0;

	mutex_lock(&port->serial->disc_mutex);
	if (!port->serial->disconnected)
		airprime_send_setup(port);
	mutex_unlock(&port->serial->disc_mutex);

	for (i = 0; i < NUM_READ_URBS; ++i) {
		usb_kill_urb(priv->read_urbp[i]);
		kfree(priv->read_urbp[i]->transfer_buffer);
		usb_free_urb(priv->read_urbp[i]);
	}

	/* free up private structure */
	kfree(priv);
	usb_set_serial_port_data(port, NULL);
}

static int airprime_write(struct usb_serial_port *port,
			  const unsigned char *buf, int count)
{
	struct airprime_private *priv = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;
	struct urb *urb;
	unsigned char *buffer;
	unsigned long flags;
	int status;
	dbg("%s - port %d", __func__, port->number);

	spin_lock_irqsave(&priv->lock, flags);
	if (priv->outstanding_urbs > NUM_WRITE_URBS) {
		spin_unlock_irqrestore(&priv->lock, flags);
		dbg("%s - write limit hit\n", __func__);
		return 0;
	}
	spin_unlock_irqrestore(&priv->lock, flags);
	buffer = kmalloc(count, GFP_ATOMIC);
	if (!buffer) {
		dev_err(&port->dev, "out of memory\n");
		return -ENOMEM;
	}
	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
		dev_err(&port->dev, "no more free urbs\n");
		kfree(buffer);
		return -ENOMEM;
	}
	memcpy(buffer, buf, count);

	usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);

	usb_fill_bulk_urb(urb, serial->dev,
			  usb_sndbulkpipe(serial->dev,
					  port->bulk_out_endpointAddress),
			  buffer, count,
			  airprime_write_bulk_callback, port);

	/* send it down the pipe */
	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status) {
		dev_err(&port->dev,
			"%s - usb_submit_urb(write bulk) failed with status = %d\n",
			__func__, status);
		count = status;
		kfree(buffer);
	} else {
		spin_lock_irqsave(&priv->lock, flags);
		++priv->outstanding_urbs;
		spin_unlock_irqrestore(&priv->lock, flags);
	}
	/* we are done with this urb, so let the host driver
	 * really free it when it is finished with it */
	usb_free_urb(urb);
	return count;
}

static struct usb_driver airprime_driver = {
	.name =		"airprime",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
	.no_dynamic_id =	1,
};

static struct usb_serial_driver airprime_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"airprime",
	},
	.usb_driver =		&airprime_driver,
	.id_table =		id_table,
	.open =			airprime_open,
	.close =		airprime_close,
	.write =		airprime_write,
};

static int __init airprime_init(void)
{
	int retval;

	airprime_device.num_ports = endpoints;
	if (endpoints < 0 || endpoints >= MAX_BULK_EPS)
		airprime_device.num_ports = NUM_BULK_EPS;

	retval = usb_serial_register(&airprime_device);
	if (retval)
		return retval;
	retval = usb_register(&airprime_driver);
	if (retval)
		usb_serial_deregister(&airprime_device);
	return retval;
}

static void __exit airprime_exit(void)
{
	dbg("%s", __func__);

	usb_deregister(&airprime_driver);
	usb_serial_deregister(&airprime_device);
}

module_init(airprime_init);
module_exit(airprime_exit);
MODULE_LICENSE("GPL");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled");
module_param(buffer_size, int, 0);
MODULE_PARM_DESC(buffer_size,
		"Size of the transfer buffers in bytes (default 4096)");
module_param(endpoints, int, 0);
MODULE_PARM_DESC(endpoints, "Number of bulk EPs to configure (default 3)");
Commit	Line	Data
3b86b202 GK	1	/*
	2	* AirPrime CDMA Wireless Serial USB driver
	3	*
5dda1712	4	* Copyright (C) 2005-2006 Greg Kroah-Hartman <gregkh@suse.de>
3b86b202 GK	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License version
	8	* 2 as published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/init.h>
	13	#include <linux/tty.h>
5dda1712	14	#include <linux/tty_flip.h>
3b86b202 GK	15	#include <linux/module.h>
3b86b202 GK	16	#include <linux/usb.h>
a969888c	17	#include <linux/usb/serial.h>
3b86b202 GK	18
3b86b202 GK	19	static struct usb_device_id id_table [] = {
34ab86e1	20	{ USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */
3b86b202 GK	21	{ },
	22	};
	23	MODULE_DEVICE_TABLE(usb, id_table);
	24
5dda1712 AG	25	#define URB_TRANSFER_BUFFER_SIZE 4096
	26	#define NUM_READ_URBS 4
	27	#define NUM_WRITE_URBS 4
	28	#define NUM_BULK_EPS 3
	29	#define MAX_BULK_EPS 6
	30
	31	/* if overridden by the user, then use their value for the size of the
	32	* read and write urbs, and the number of endpoints */
	33	static int buffer_size = URB_TRANSFER_BUFFER_SIZE;
	34	static int endpoints = NUM_BULK_EPS;
	35	static int debug;
	36	struct airprime_private {
	37	spinlock_t lock;
	38	int outstanding_urbs;
	39	int throttled;
	40	struct urb *read_urbp[NUM_READ_URBS];
cf0cb1ae MS	41
	42	/* Settings for the port */
	43	int rts_state; /* Handshaking pins (outputs) */
	44	int dtr_state;
	45	int cts_state; /* Handshaking pins (inputs) */
	46	int dsr_state;
	47	int dcd_state;
	48	int ri_state;
5dda1712 AG	49	};
5dda1712 AG	50
cf0cb1ae MS	51	static int airprime_send_setup(struct usb_serial_port *port)
	52	{
	53	struct usb_serial *serial = port->serial;
	54	struct airprime_private *priv;
	55
441b62c1	56	dbg("%s", __func__);
cf0cb1ae MS	57
	58	if (port->number != 0)
	59	return 0;
	60
	61	priv = usb_get_serial_port_data(port);
	62
	63	if (port->tty) {
	64	int val = 0;
	65	if (priv->dtr_state)
	66	val \|= 0x01;
	67	if (priv->rts_state)
	68	val \|= 0x02;
	69
	70	return usb_control_msg(serial->dev,
c4d0f8cb AC	71	usb_rcvctrlpipe(serial->dev, 0),
	72	0x22, 0x21, val, 0, NULL, 0,
	73	USB_CTRL_SET_TIMEOUT);
cf0cb1ae MS	74	}
	75
	76	return 0;
	77	}
	78
7d12e780	79	static void airprime_read_bulk_callback(struct urb *urb)
5dda1712 AG	80	{
	81	struct usb_serial_port *port = urb->context;
	82	unsigned char *data = urb->transfer_buffer;
	83	struct tty_struct *tty;
	84	int result;
d3434cf6	85	int status = urb->status;
5dda1712	86
441b62c1	87	dbg("%s - port %d", __func__, port->number);
5dda1712	88
d3434cf6	89	if (status) {
5dda1712	90	dbg("%s - nonzero read bulk status received: %d",
441b62c1	91	__func__, status);
5dda1712 AG	92	return;
5dda1712 AG	93	}
c4d0f8cb AC	94	usb_serial_debug_data(debug, &port->dev, __func__,
c4d0f8cb AC	95	urb->actual_length, data);
5dda1712 AG	96
	97	tty = port->tty;
	98	if (tty && urb->actual_length) {
c4d0f8cb AC	99	tty_insert_flip_string(tty, data, urb->actual_length);
c4d0f8cb AC	100	tty_flip_buffer_push(tty);
5dda1712 AG	101	}
5dda1712 AG	102
c4d0f8cb	103	result = usb_submit_urb(urb, GFP_ATOMIC);
5dda1712	104	if (result)
c4d0f8cb AC	105	dev_err(&port->dev,
c4d0f8cb AC	106	"%s - failed resubmitting read urb, error %d\n",
441b62c1	107	__func__, result);
5dda1712 AG	108	return;
	109	}
	110
7d12e780	111	static void airprime_write_bulk_callback(struct urb *urb)
5dda1712 AG	112	{
	113	struct usb_serial_port *port = urb->context;
	114	struct airprime_private *priv = usb_get_serial_port_data(port);
d3434cf6	115	int status = urb->status;
5dda1712 AG	116	unsigned long flags;
5dda1712 AG	117
441b62c1	118	dbg("%s - port %d", __func__, port->number);
5dda1712 AG	119
5dda1712 AG	120	/* free up the transfer buffer, as usb_free_urb() does not do this */
c4d0f8cb	121	kfree(urb->transfer_buffer);
5dda1712	122
d3434cf6	123	if (status)
5dda1712	124	dbg("%s - nonzero write bulk status received: %d",
441b62c1	125	__func__, status);
5dda1712 AG	126	spin_lock_irqsave(&priv->lock, flags);
	127	--priv->outstanding_urbs;
	128	spin_unlock_irqrestore(&priv->lock, flags);
	129
	130	usb_serial_port_softint(port);
	131	}
	132
	133	static int airprime_open(struct usb_serial_port port, struct file filp)
	134	{
	135	struct airprime_private *priv = usb_get_serial_port_data(port);
	136	struct usb_serial *serial = port->serial;
	137	struct urb *urb;
	138	char *buffer = NULL;
	139	int i;
	140	int result = 0;
	141
441b62c1	142	dbg("%s - port %d", __func__, port->number);
5dda1712 AG	143
	144	/* initialize our private data structure if it isn't already created */
	145	if (!priv) {
	146	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	147	if (!priv) {
	148	result = -ENOMEM;
	149	goto out;
	150	}
	151	spin_lock_init(&priv->lock);
	152	usb_set_serial_port_data(port, priv);
	153	}
	154
cf0cb1ae MS	155	/* Set some sane defaults */
	156	priv->rts_state = 1;
	157	priv->dtr_state = 1;
	158
5dda1712 AG	159	for (i = 0; i < NUM_READ_URBS; ++i) {
	160	buffer = kmalloc(buffer_size, GFP_KERNEL);
	161	if (!buffer) {
	162	dev_err(&port->dev, "%s - out of memory.\n",
441b62c1	163	__func__);
5dda1712 AG	164	result = -ENOMEM;
	165	goto errout;
	166	}
	167	urb = usb_alloc_urb(0, GFP_KERNEL);
	168	if (!urb) {
0e185b79	169	kfree(buffer);
5dda1712	170	dev_err(&port->dev, "%s - no more urbs?\n",
441b62c1	171	__func__);
5dda1712 AG	172	result = -ENOMEM;
	173	goto errout;
	174	}
	175	usb_fill_bulk_urb(urb, serial->dev,
	176	usb_rcvbulkpipe(serial->dev,
c4d0f8cb	177	port->bulk_out_endpointAddress),
5dda1712 AG	178	buffer, buffer_size,
	179	airprime_read_bulk_callback, port);
	180	result = usb_submit_urb(urb, GFP_KERNEL);
	181	if (result) {
af59cf40 PZ	182	usb_free_urb(urb);
af59cf40 PZ	183	kfree(buffer);
5dda1712 AG	184	dev_err(&port->dev,
5dda1712 AG	185	"%s - failed submitting read urb %d for port %d, error %d\n",
441b62c1	186	__func__, i, port->number, result);
5dda1712 AG	187	goto errout;
5dda1712 AG	188	}
c4d0f8cb AC	189	/* remember this urb so we can kill it when the
c4d0f8cb AC	190	port is closed */
5dda1712 AG	191	priv->read_urbp[i] = urb;
5dda1712 AG	192	}
cf0cb1ae MS	193
	194	airprime_send_setup(port);
	195
5dda1712 AG	196	goto out;
	197
	198	errout:
c4d0f8cb AC	199	/* some error happened, cancel any submitted urbs and clean up
c4d0f8cb AC	200	anything that got allocated successfully */
5dda1712	201
af59cf40	202	while (i-- != 0) {
5dda1712	203	urb = priv->read_urbp[i];
af59cf40	204	buffer = urb->transfer_buffer;
c4d0f8cb AC	205	usb_kill_urb(urb);
	206	usb_free_urb(urb);
	207	kfree(buffer);
5dda1712 AG	208	}
	209
	210	out:
	211	return result;
	212	}
	213
c4d0f8cb	214	static void airprime_close(struct usb_serial_port port, struct file filp)
5dda1712 AG	215	{
	216	struct airprime_private *priv = usb_get_serial_port_data(port);
	217	int i;
	218
441b62c1	219	dbg("%s - port %d", __func__, port->number);
5dda1712	220
cf0cb1ae MS	221	priv->rts_state = 0;
	222	priv->dtr_state = 0;
	223
95bef012 ON	224	mutex_lock(&port->serial->disc_mutex);
	225	if (!port->serial->disconnected)
	226	airprime_send_setup(port);
21ae1dd1	227	mutex_unlock(&port->serial->disc_mutex);
cf0cb1ae	228
5dda1712	229	for (i = 0; i < NUM_READ_URBS; ++i) {
c4d0f8cb AC	230	usb_kill_urb(priv->read_urbp[i]);
	231	kfree(priv->read_urbp[i]->transfer_buffer);
	232	usb_free_urb(priv->read_urbp[i]);
5dda1712 AG	233	}
	234
	235	/* free up private structure */
c4d0f8cb	236	kfree(priv);
5dda1712 AG	237	usb_set_serial_port_data(port, NULL);
	238	}
	239
	240	static int airprime_write(struct usb_serial_port *port,
	241	const unsigned char *buf, int count)
	242	{
	243	struct airprime_private *priv = usb_get_serial_port_data(port);
	244	struct usb_serial *serial = port->serial;
	245	struct urb *urb;
	246	unsigned char *buffer;
	247	unsigned long flags;
	248	int status;
441b62c1	249	dbg("%s - port %d", __func__, port->number);
5dda1712 AG	250
	251	spin_lock_irqsave(&priv->lock, flags);
	252	if (priv->outstanding_urbs > NUM_WRITE_URBS) {
	253	spin_unlock_irqrestore(&priv->lock, flags);
441b62c1	254	dbg("%s - write limit hit\n", __func__);
5dda1712 AG	255	return 0;
	256	}
	257	spin_unlock_irqrestore(&priv->lock, flags);
	258	buffer = kmalloc(count, GFP_ATOMIC);
	259	if (!buffer) {
	260	dev_err(&port->dev, "out of memory\n");
	261	return -ENOMEM;
	262	}
	263	urb = usb_alloc_urb(0, GFP_ATOMIC);
	264	if (!urb) {
	265	dev_err(&port->dev, "no more free urbs\n");
c4d0f8cb	266	kfree(buffer);
5dda1712 AG	267	return -ENOMEM;
5dda1712 AG	268	}
c4d0f8cb	269	memcpy(buffer, buf, count);
5dda1712	270
441b62c1	271	usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
5dda1712 AG	272
	273	usb_fill_bulk_urb(urb, serial->dev,
	274	usb_sndbulkpipe(serial->dev,
	275	port->bulk_out_endpointAddress),
	276	buffer, count,
	277	airprime_write_bulk_callback, port);
	278
	279	/* send it down the pipe */
	280	status = usb_submit_urb(urb, GFP_ATOMIC);
	281	if (status) {
	282	dev_err(&port->dev,
	283	"%s - usb_submit_urb(write bulk) failed with status = %d\n",
441b62c1	284	__func__, status);
5dda1712	285	count = status;
c4d0f8cb	286	kfree(buffer);
5dda1712 AG	287	} else {
	288	spin_lock_irqsave(&priv->lock, flags);
	289	++priv->outstanding_urbs;
	290	spin_unlock_irqrestore(&priv->lock, flags);
	291	}
	292	/* we are done with this urb, so let the host driver
	293	* really free it when it is finished with it */
c4d0f8cb	294	usb_free_urb(urb);
5dda1712 AG	295	return count;
	296	}
	297
3b86b202	298	static struct usb_driver airprime_driver = {
3b86b202 GK	299	.name = "airprime",
	300	.probe = usb_serial_probe,
	301	.disconnect = usb_serial_disconnect,
	302	.id_table = id_table,
5dda1712	303	.no_dynamic_id = 1,
3b86b202 GK	304	};
3b86b202 GK	305
ea65370d	306	static struct usb_serial_driver airprime_device = {
18fcac35 GKH	307	.driver = {
18fcac35 GKH	308	.owner = THIS_MODULE,
269bda1c	309	.name = "airprime",
18fcac35	310	},
d9b1b787	311	.usb_driver = &airprime_driver,
3b86b202	312	.id_table = id_table,
5dda1712 AG	313	.open = airprime_open,
	314	.close = airprime_close,
	315	.write = airprime_write,
3b86b202 GK	316	};
	317
	318	static int __init airprime_init(void)
	319	{
	320	int retval;
	321
c4d0f8cb AC	322	airprime_device.num_ports = endpoints;
	323	if (endpoints < 0 \|\| endpoints >= MAX_BULK_EPS)
	324	airprime_device.num_ports = NUM_BULK_EPS;
	325
3b86b202 GK	326	retval = usb_serial_register(&airprime_device);
	327	if (retval)
	328	return retval;
	329	retval = usb_register(&airprime_driver);
	330	if (retval)
	331	usb_serial_deregister(&airprime_device);
	332	return retval;
	333	}
	334
	335	static void __exit airprime_exit(void)
	336	{
441b62c1	337	dbg("%s", __func__);
5dda1712	338
3b86b202 GK	339	usb_deregister(&airprime_driver);
	340	usb_serial_deregister(&airprime_device);
	341	}
	342
	343	module_init(airprime_init);
	344	module_exit(airprime_exit);
	345	MODULE_LICENSE("GPL");
5dda1712 AG	346
	347	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	348	MODULE_PARM_DESC(debug, "Debug enabled");
	349	module_param(buffer_size, int, 0);
c4d0f8cb AC	350	MODULE_PARM_DESC(buffer_size,
c4d0f8cb AC	351	"Size of the transfer buffers in bytes (default 4096)");
5dda1712 AG	352	module_param(endpoints, int, 0);
5dda1712 AG	353	MODULE_PARM_DESC(endpoints, "Number of bulk EPs to configure (default 3)");