[deliverable/linux.git] / drivers / usb / serial / sierra.c

/*
  USB Driver for Sierra Wireless

  Copyright (C) 2006  Kevin Lloyd <linux@sierrawireless.com>

  IMPORTANT DISCLAIMER: This driver is not commercially supported by
  Sierra Wireless. Use at your own risk.

  This driver is free software; you can redistribute it and/or modify
  it under the terms of Version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
  Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>

  History:
*/

#define DRIVER_VERSION "v.1.0.5"
#define DRIVER_AUTHOR "Kevin Lloyd <linux@sierrawireless.com>"
#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"

#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.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(0x1199, 0x0018) },	/* Sierra Wireless MC5720 */
	{ USB_DEVICE(0x1199, 0x0020) },	/* Sierra Wireless MC5725 */
	{ USB_DEVICE(0x1199, 0x0017) },	/* Sierra Wireless EM5625 */
	{ USB_DEVICE(0x1199, 0x0019) },	/* Sierra Wireless AirCard 595 */
	{ USB_DEVICE(0x1199, 0x6802) },	/* Sierra Wireless MC8755 */
	{ USB_DEVICE(0x1199, 0x6803) },	/* Sierra Wireless MC8765 */
	{ USB_DEVICE(0x1199, 0x6812) },	/* Sierra Wireless MC8775 */
	{ USB_DEVICE(0x1199, 0x6820) },	/* Sierra Wireless AirCard 875 */

	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
	{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
	{ }
};
MODULE_DEVICE_TABLE(usb, id_table);

static struct usb_device_id id_table_1port [] = {
	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
	{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
	{ }
};

static struct usb_device_id id_table_3port [] = {
	{ USB_DEVICE(0x1199, 0x0018) },	/* Sierra Wireless MC5720 */
	{ USB_DEVICE(0x1199, 0x0020) },	/* Sierra Wireless MC5725 */
	{ USB_DEVICE(0x1199, 0x0017) },	/* Sierra Wireless EM5625 */
	{ USB_DEVICE(0x1199, 0x0019) },	/* Sierra Wireless AirCard 595 */
	{ USB_DEVICE(0x1199, 0x6802) },	/* Sierra Wireless MC8755 */
	{ USB_DEVICE(0x1199, 0x6803) },	/* Sierra Wireless MC8765 */
	{ USB_DEVICE(0x1199, 0x6812) },	/* Sierra Wireless MC8775 */
	{ USB_DEVICE(0x1199, 0x6820) },	/* Sierra Wireless AirCard 875 */
	{ }
};

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


static int debug;

/* per port private data */
#define N_IN_URB	4
#define N_OUT_URB	1
#define IN_BUFLEN	4096
#define OUT_BUFLEN	128

struct sierra_port_private {
	/* Input endpoints and buffer for this port */
	struct urb *in_urbs[N_IN_URB];
	char in_buffer[N_IN_URB][IN_BUFLEN];
	/* Output endpoints and buffer for this port */
	struct urb *out_urbs[N_OUT_URB];
	char out_buffer[N_OUT_URB][OUT_BUFLEN];

	/* 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;

	unsigned long tx_start_time[N_OUT_URB];
};

static int sierra_send_setup(struct usb_serial_port *port)
{
	struct usb_serial *serial = port->serial;
	struct sierra_port_private *portdata;

	dbg("%s", __FUNCTION__);

	portdata = usb_get_serial_port_data(port);

	if (port->tty) {
		int val = 0;
		if (portdata->dtr_state)
			val |= 0x01;
		if (portdata->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 sierra_rx_throttle(struct usb_serial_port *port)
{
	dbg("%s", __FUNCTION__);
}

static void sierra_rx_unthrottle(struct usb_serial_port *port)
{
	dbg("%s", __FUNCTION__);
}

static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
{
	/* Unfortunately, I don't know how to send a break */
	dbg("%s", __FUNCTION__);
}

static void sierra_set_termios(struct usb_serial_port *port,
			struct termios *old_termios)
{
	dbg("%s", __FUNCTION__);

	sierra_send_setup(port);
}

static int sierra_tiocmget(struct usb_serial_port *port, struct file *file)
{
	unsigned int value;
	struct sierra_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
		((portdata->dtr_state) ? TIOCM_DTR : 0) |
		((portdata->cts_state) ? TIOCM_CTS : 0) |
		((portdata->dsr_state) ? TIOCM_DSR : 0) |
		((portdata->dcd_state) ? TIOCM_CAR : 0) |
		((portdata->ri_state) ? TIOCM_RNG : 0);

	return value;
}

static int sierra_tiocmset(struct usb_serial_port *port, struct file *file,
			unsigned int set, unsigned int clear)
{
	struct sierra_port_private *portdata;

	portdata = usb_get_serial_port_data(port);

	if (set & TIOCM_RTS)
		portdata->rts_state = 1;
	if (set & TIOCM_DTR)
		portdata->dtr_state = 1;

	if (clear & TIOCM_RTS)
		portdata->rts_state = 0;
	if (clear & TIOCM_DTR)
		portdata->dtr_state = 0;
	return sierra_send_setup(port);
}

static int sierra_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	return -ENOIOCTLCMD;
}

/* Write */
static int sierra_write(struct usb_serial_port *port,
			const unsigned char *buf, int count)
{
	struct sierra_port_private *portdata;
	int i;
	int left, todo;
	struct urb *this_urb = NULL; /* spurious */
	int err;

	portdata = usb_get_serial_port_data(port);

	dbg("%s: write (%d chars)", __FUNCTION__, count);

	i = 0;
	left = count;
	for (i=0; left > 0 && i < N_OUT_URB; i++) {
		todo = left;
		if (todo > OUT_BUFLEN)
			todo = OUT_BUFLEN;

		this_urb = portdata->out_urbs[i];
		if (this_urb->status == -EINPROGRESS) {
			if (time_before(jiffies,
					portdata->tx_start_time[i] + 10 * HZ))
				continue;
			usb_unlink_urb(this_urb);
			continue;
		}
		if (this_urb->status != 0)
			dbg("usb_write %p failed (err=%d)",
				this_urb, this_urb->status);

		dbg("%s: endpoint %d buf %d", __FUNCTION__,
			usb_pipeendpoint(this_urb->pipe), i);

		/* send the data */
		memcpy (this_urb->transfer_buffer, buf, todo);
		this_urb->transfer_buffer_length = todo;

		this_urb->dev = port->serial->dev;
		err = usb_submit_urb(this_urb, GFP_ATOMIC);
		if (err) {
			dbg("usb_submit_urb %p (write bulk) failed "
				"(%d, has %d)", this_urb,
				err, this_urb->status);
			continue;
		}
		portdata->tx_start_time[i] = jiffies;
		buf += todo;
		left -= todo;
	}

	count -= left;
	dbg("%s: wrote (did %d)", __FUNCTION__, count);
	return count;
}

static void sierra_indat_callback(struct urb *urb)
{
	int err;
	int endpoint;
	struct usb_serial_port *port;
	struct tty_struct *tty;
	unsigned char *data = urb->transfer_buffer;

	dbg("%s: %p", __FUNCTION__, urb);

	endpoint = usb_pipeendpoint(urb->pipe);
	port = (struct usb_serial_port *) urb->context;

	if (urb->status) {
		dbg("%s: nonzero status: %d on endpoint %02x.",
		    __FUNCTION__, urb->status, endpoint);
	} else {
		tty = port->tty;
		if (urb->actual_length) {
			tty_buffer_request_room(tty, urb->actual_length);
			tty_insert_flip_string(tty, data, urb->actual_length);
			tty_flip_buffer_push(tty);
		} else {
			dbg("%s: empty read urb received", __FUNCTION__);
		}

		/* Resubmit urb so we continue receiving */
		if (port->open_count && urb->status != -ESHUTDOWN) {
			err = usb_submit_urb(urb, GFP_ATOMIC);
			if (err)
				printk(KERN_ERR "%s: resubmit read urb failed. "
					"(%d)", __FUNCTION__, err);
		}
	}
	return;
}

static void sierra_outdat_callback(struct urb *urb)
{
	struct usb_serial_port *port;

	dbg("%s", __FUNCTION__);

	port = (struct usb_serial_port *) urb->context;

	usb_serial_port_softint(port);
}

static void sierra_instat_callback(struct urb *urb)
{
	int err;
	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
	struct usb_serial *serial = port->serial;

	dbg("%s", __FUNCTION__);
	dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);

	if (urb->status == 0) {
		struct usb_ctrlrequest *req_pkt =
				(struct usb_ctrlrequest *)urb->transfer_buffer;

		if (!req_pkt) {
			dbg("%s: NULL req_pkt\n", __FUNCTION__);
			return;
		}
		if ((req_pkt->bRequestType == 0xA1) &&
				(req_pkt->bRequest == 0x20)) {
			int old_dcd_state;
			unsigned char signals = *((unsigned char *)
					urb->transfer_buffer +
					sizeof(struct usb_ctrlrequest));

			dbg("%s: signal x%x", __FUNCTION__, signals);

			old_dcd_state = portdata->dcd_state;
			portdata->cts_state = 1;
			portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
			portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
			portdata->ri_state = ((signals & 0x08) ? 1 : 0);

			if (port->tty && !C_CLOCAL(port->tty) &&
					old_dcd_state && !portdata->dcd_state)
				tty_hangup(port->tty);
		} else {
			dbg("%s: type %x req %x", __FUNCTION__,
				req_pkt->bRequestType,req_pkt->bRequest);
		}
	} else
		dbg("%s: error %d", __FUNCTION__, urb->status);

	/* Resubmit urb so we continue receiving IRQ data */
	if (urb->status != -ESHUTDOWN) {
		urb->dev = serial->dev;
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err)
			dbg("%s: resubmit intr urb failed. (%d)",
				__FUNCTION__, err);
	}
}

static int sierra_write_room(struct usb_serial_port *port)
{
	struct sierra_port_private *portdata;
	int i;
	int data_len = 0;
	struct urb *this_urb;

	portdata = usb_get_serial_port_data(port);

	for (i=0; i < N_OUT_URB; i++) {
		this_urb = portdata->out_urbs[i];
		if (this_urb && this_urb->status != -EINPROGRESS)
			data_len += OUT_BUFLEN;
	}

	dbg("%s: %d", __FUNCTION__, data_len);
	return data_len;
}

static int sierra_chars_in_buffer(struct usb_serial_port *port)
{
	struct sierra_port_private *portdata;
	int i;
	int data_len = 0;
	struct urb *this_urb;

	portdata = usb_get_serial_port_data(port);

	for (i=0; i < N_OUT_URB; i++) {
		this_urb = portdata->out_urbs[i];
		if (this_urb && this_urb->status == -EINPROGRESS)
			data_len += this_urb->transfer_buffer_length;
	}
	dbg("%s: %d", __FUNCTION__, data_len);
	return data_len;
}

static int sierra_open(struct usb_serial_port *port, struct file *filp)
{
	struct sierra_port_private *portdata;
	struct usb_serial *serial = port->serial;
	int i, err;
	struct urb *urb;

	portdata = usb_get_serial_port_data(port);

	dbg("%s", __FUNCTION__);

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

	/* Reset low level data toggle and start reading from endpoints */
	for (i = 0; i < N_IN_URB; i++) {
		urb = portdata->in_urbs[i];
		if (! urb)
			continue;
		if (urb->dev != serial->dev) {
			dbg("%s: dev %p != %p", __FUNCTION__,
				urb->dev, serial->dev);
			continue;
		}

		/*
		 * make sure endpoint data toggle is synchronized with the
		 * device
		 */
		usb_clear_halt(urb->dev, urb->pipe);

		err = usb_submit_urb(urb, GFP_KERNEL);
		if (err) {
			dbg("%s: submit urb %d failed (%d) %d",
				__FUNCTION__, i, err,
				urb->transfer_buffer_length);
		}
	}

	/* Reset low level data toggle on out endpoints */
	for (i = 0; i < N_OUT_URB; i++) {
		urb = portdata->out_urbs[i];
		if (! urb)
			continue;
		urb->dev = serial->dev;
		/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
				usb_pipeout(urb->pipe), 0); */
	}

	port->tty->low_latency = 1;

	sierra_send_setup(port);

	return (0);
}

static inline void stop_urb(struct urb *urb)
{
	if (urb && urb->status == -EINPROGRESS)
		usb_kill_urb(urb);
}

static void sierra_close(struct usb_serial_port *port, struct file *filp)
{
	int i;
	struct usb_serial *serial = port->serial;
	struct sierra_port_private *portdata;

	dbg("%s", __FUNCTION__);
	portdata = usb_get_serial_port_data(port);

	portdata->rts_state = 0;
	portdata->dtr_state = 0;

	if (serial->dev) {
		sierra_send_setup(port);

		/* Stop reading/writing urbs */
		for (i = 0; i < N_IN_URB; i++)
			stop_urb(portdata->in_urbs[i]);
		for (i = 0; i < N_OUT_URB; i++)
			stop_urb(portdata->out_urbs[i]);
	}
	port->tty = NULL;
}

/* Helper functions used by sierra_setup_urbs */
static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
				    int dir, void *ctx, char *buf, int len,
				    usb_complete_t callback)
{
	struct urb *urb;

	if (endpoint == -1)
		return NULL;		/* endpoint not needed */

	urb = usb_alloc_urb(0, GFP_KERNEL);		/* No ISO */
	if (urb == NULL) {
		dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
		return NULL;
	}

		/* Fill URB using supplied data. */
	usb_fill_bulk_urb(urb, serial->dev,
		      usb_sndbulkpipe(serial->dev, endpoint) | dir,
		      buf, len, callback, ctx);

	return urb;
}

/* Setup urbs */
static void sierra_setup_urbs(struct usb_serial *serial)
{
	int i,j;
	struct usb_serial_port *port;
	struct sierra_port_private *portdata;

	dbg("%s", __FUNCTION__);

	for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);

	/* Do indat endpoints first */
		for (j = 0; j < N_IN_URB; ++j) {
			portdata->in_urbs[j] = sierra_setup_urb (serial,
                  	port->bulk_in_endpointAddress, USB_DIR_IN, port,
                  	portdata->in_buffer[j], IN_BUFLEN, sierra_indat_callback);
		}

		/* outdat endpoints */
		for (j = 0; j < N_OUT_URB; ++j) {
			portdata->out_urbs[j] = sierra_setup_urb (serial,
                  	port->bulk_out_endpointAddress, USB_DIR_OUT, port,
                  	portdata->out_buffer[j], OUT_BUFLEN, sierra_outdat_callback);
		}
	}
}

static int sierra_startup(struct usb_serial *serial)
{
	int i, err;
	struct usb_serial_port *port;
	struct sierra_port_private *portdata;

	dbg("%s", __FUNCTION__);

	/* Now setup per port private data */
	for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
		if (!portdata) {
			dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
					__FUNCTION__, i);
			return (1);
		}

		usb_set_serial_port_data(port, portdata);

		if (! port->interrupt_in_urb)
			continue;
		err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
		if (err)
			dbg("%s: submit irq_in urb failed %d",
				__FUNCTION__, err);
	}

	sierra_setup_urbs(serial);

	return (0);
}

static void sierra_shutdown(struct usb_serial *serial)
{
	int i, j;
	struct usb_serial_port *port;
	struct sierra_port_private *portdata;

	dbg("%s", __FUNCTION__);

	/* Stop reading/writing urbs */
	for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);
		for (j = 0; j < N_IN_URB; j++)
			stop_urb(portdata->in_urbs[j]);
		for (j = 0; j < N_OUT_URB; j++)
			stop_urb(portdata->out_urbs[j]);
	}

	/* Now free them */
	for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);

		for (j = 0; j < N_IN_URB; j++) {
			if (portdata->in_urbs[j]) {
				usb_free_urb(portdata->in_urbs[j]);
				portdata->in_urbs[j] = NULL;
			}
		}
		for (j = 0; j < N_OUT_URB; j++) {
			if (portdata->out_urbs[j]) {
				usb_free_urb(portdata->out_urbs[j]);
				portdata->out_urbs[j] = NULL;
			}
		}
	}

	/* Now free per port private data */
	for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		kfree(usb_get_serial_port_data(port));
	}
}

static struct usb_serial_driver sierra_1port_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"sierra1",
	},
	.description       = "Sierra USB modem (1 port)",
	.id_table          = id_table_1port,
	.num_interrupt_in  = NUM_DONT_CARE,
	.num_bulk_in       = 1,
	.num_bulk_out      = 1,
	.num_ports         = 1,
	.open              = sierra_open,
	.close             = sierra_close,
	.write             = sierra_write,
	.write_room        = sierra_write_room,
	.chars_in_buffer   = sierra_chars_in_buffer,
	.throttle          = sierra_rx_throttle,
	.unthrottle        = sierra_rx_unthrottle,
	.ioctl             = sierra_ioctl,
	.set_termios       = sierra_set_termios,
	.break_ctl         = sierra_break_ctl,
	.tiocmget          = sierra_tiocmget,
	.tiocmset          = sierra_tiocmset,
	.attach            = sierra_startup,
	.shutdown          = sierra_shutdown,
	.read_int_callback = sierra_instat_callback,
};

static struct usb_serial_driver sierra_3port_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"sierra3",
	},
	.description       = "Sierra USB modem (3 port)",
	.id_table          = id_table_3port,
	.num_interrupt_in  = NUM_DONT_CARE,
	.num_bulk_in       = 3,
	.num_bulk_out      = 3,
	.num_ports         = 3,
	.open              = sierra_open,
	.close             = sierra_close,
	.write             = sierra_write,
	.write_room        = sierra_write_room,
	.chars_in_buffer   = sierra_chars_in_buffer,
	.throttle          = sierra_rx_throttle,
	.unthrottle        = sierra_rx_unthrottle,
	.ioctl             = sierra_ioctl,
	.set_termios       = sierra_set_termios,
	.break_ctl         = sierra_break_ctl,
	.tiocmget          = sierra_tiocmget,
	.tiocmset          = sierra_tiocmset,
	.attach            = sierra_startup,
	.shutdown          = sierra_shutdown,
	.read_int_callback = sierra_instat_callback,
};

/* Functions used by new usb-serial code. */
static int __init sierra_init(void)
{
	int retval;
	retval = usb_serial_register(&sierra_1port_device);
	if (retval)
		goto failed_1port_device_register;
	retval = usb_serial_register(&sierra_3port_device);
	if (retval)
		goto failed_3port_device_register;


	retval = usb_register(&sierra_driver);
	if (retval)
		goto failed_driver_register;

	info(DRIVER_DESC ": " DRIVER_VERSION);

	return 0;

failed_driver_register:
	usb_serial_deregister(&sierra_3port_device);
failed_3port_device_register:
	usb_serial_deregister(&sierra_1port_device);
failed_1port_device_register:
	return retval;
}

static void __exit sierra_exit(void)
{
	usb_deregister (&sierra_driver);
	usb_serial_deregister(&sierra_1port_device);
	usb_serial_deregister(&sierra_3port_device);
}

module_init(sierra_init);
module_exit(sierra_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");

#ifdef CONFIG_USB_DEBUG
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug messages");
#endif
Commit	Line	Data
69de51fd	1	/*
033a3fb9 KL	2	USB Driver for Sierra Wireless
	3
	4	Copyright (C) 2006 Kevin Lloyd <linux@sierrawireless.com>
	5
	6	IMPORTANT DISCLAIMER: This driver is not commercially supported by
	7	Sierra Wireless. Use at your own risk.
	8
	9	This driver is free software; you can redistribute it and/or modify
	10	it under the terms of Version 2 of the GNU General Public License as
	11	published by the Free Software Foundation.
	12
	13	Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
	14	Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
	15
	16	History:
	17	*/
	18
	19	#define DRIVER_VERSION "v.1.0.5"
	20	#define DRIVER_AUTHOR "Kevin Lloyd <linux@sierrawireless.com>"
	21	#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
69de51fd KL	22
69de51fd KL	23	#include <linux/kernel.h>
033a3fb9 KL	24	#include <linux/jiffies.h>
033a3fb9 KL	25	#include <linux/errno.h>
69de51fd	26	#include <linux/tty.h>
033a3fb9	27	#include <linux/tty_flip.h>
69de51fd KL	28	#include <linux/module.h>
69de51fd KL	29	#include <linux/usb.h>
a969888c	30	#include <linux/usb/serial.h>
69de51fd	31
033a3fb9	32
69de51fd KL	33	static struct usb_device_id id_table [] = {
	34	{ USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
	35	{ USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
	36	{ USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
	37	{ USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
	38	{ USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
	39	{ USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
	40	{ USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 */
	41	{ USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
033a3fb9 KL	42
	43	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
	44	{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
	45	{ }
	46	};
964ee1de	47	MODULE_DEVICE_TABLE(usb, id_table);
033a3fb9 KL	48
	49	static struct usb_device_id id_table_1port [] = {
	50	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
	51	{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
69de51fd KL	52	{ }
69de51fd KL	53	};
033a3fb9 KL	54
	55	static struct usb_device_id id_table_3port [] = {
	56	{ USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
	57	{ USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
	58	{ USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
	59	{ USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
	60	{ USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
	61	{ USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
	62	{ USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 */
	63	{ USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
	64	{ }
	65	};
	66
69de51fd	67	static struct usb_driver sierra_driver = {
033a3fb9 KL	68	.name = "sierra",
	69	.probe = usb_serial_probe,
	70	.disconnect = usb_serial_disconnect,
	71	.id_table = id_table,
964ee1de	72	.no_dynamic_id = 1,
033a3fb9 KL	73	};
	74
	75
033a3fb9	76	static int debug;
033a3fb9 KL	77
033a3fb9 KL	78	/* per port private data */
964ee1de GKH	79	#define N_IN_URB 4
	80	#define N_OUT_URB 1
	81	#define IN_BUFLEN 4096
	82	#define OUT_BUFLEN 128
033a3fb9 KL	83
	84	struct sierra_port_private {
	85	/* Input endpoints and buffer for this port */
	86	struct urb *in_urbs[N_IN_URB];
	87	char in_buffer[N_IN_URB][IN_BUFLEN];
	88	/* Output endpoints and buffer for this port */
	89	struct urb *out_urbs[N_OUT_URB];
	90	char out_buffer[N_OUT_URB][OUT_BUFLEN];
	91
	92	/* Settings for the port */
	93	int rts_state; /* Handshaking pins (outputs) */
	94	int dtr_state;
	95	int cts_state; /* Handshaking pins (inputs) */
	96	int dsr_state;
	97	int dcd_state;
	98	int ri_state;
	99
	100	unsigned long tx_start_time[N_OUT_URB];
	101	};
	102
964ee1de	103	static int sierra_send_setup(struct usb_serial_port *port)
69de51fd	104	{
964ee1de GKH	105	struct usb_serial *serial = port->serial;
964ee1de GKH	106	struct sierra_port_private *portdata;
033a3fb9	107
964ee1de	108	dbg("%s", __FUNCTION__);
033a3fb9	109
964ee1de	110	portdata = usb_get_serial_port_data(port);
033a3fb9	111
964ee1de GKH	112	if (port->tty) {
	113	int val = 0;
	114	if (portdata->dtr_state)
	115	val \|= 0x01;
	116	if (portdata->rts_state)
	117	val \|= 0x02;
033a3fb9	118
964ee1de GKH	119	return usb_control_msg(serial->dev,
	120	usb_rcvctrlpipe(serial->dev, 0),
	121	0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
	122	}
69de51fd	123
964ee1de	124	return 0;
69de51fd KL	125	}
69de51fd KL	126
033a3fb9 KL	127	static void sierra_rx_throttle(struct usb_serial_port *port)
	128	{
	129	dbg("%s", __FUNCTION__);
	130	}
	131
	132	static void sierra_rx_unthrottle(struct usb_serial_port *port)
	133	{
	134	dbg("%s", __FUNCTION__);
	135	}
	136
	137	static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
	138	{
	139	/* Unfortunately, I don't know how to send a break */
	140	dbg("%s", __FUNCTION__);
	141	}
	142
	143	static void sierra_set_termios(struct usb_serial_port *port,
	144	struct termios *old_termios)
	145	{
	146	dbg("%s", __FUNCTION__);
	147
	148	sierra_send_setup(port);
	149	}
	150
	151	static int sierra_tiocmget(struct usb_serial_port port, struct file file)
	152	{
	153	unsigned int value;
	154	struct sierra_port_private *portdata;
	155
	156	portdata = usb_get_serial_port_data(port);
	157
	158	value = ((portdata->rts_state) ? TIOCM_RTS : 0) \|
	159	((portdata->dtr_state) ? TIOCM_DTR : 0) \|
	160	((portdata->cts_state) ? TIOCM_CTS : 0) \|
	161	((portdata->dsr_state) ? TIOCM_DSR : 0) \|
	162	((portdata->dcd_state) ? TIOCM_CAR : 0) \|
	163	((portdata->ri_state) ? TIOCM_RNG : 0);
	164
	165	return value;
	166	}
	167
	168	static int sierra_tiocmset(struct usb_serial_port port, struct file file,
	169	unsigned int set, unsigned int clear)
	170	{
	171	struct sierra_port_private *portdata;
	172
	173	portdata = usb_get_serial_port_data(port);
	174
	175	if (set & TIOCM_RTS)
	176	portdata->rts_state = 1;
	177	if (set & TIOCM_DTR)
	178	portdata->dtr_state = 1;
	179
	180	if (clear & TIOCM_RTS)
	181	portdata->rts_state = 0;
	182	if (clear & TIOCM_DTR)
	183	portdata->dtr_state = 0;
	184	return sierra_send_setup(port);
	185	}
	186
	187	static int sierra_ioctl(struct usb_serial_port port, struct file file,
	188	unsigned int cmd, unsigned long arg)
	189	{
	190	return -ENOIOCTLCMD;
191	}
192
193	/* Write */
194	static int sierra_write(struct usb_serial_port *port,
195	const unsigned char *buf, int count)
196	{
197	struct sierra_port_private *portdata;
198	int i;
199	int left, todo;
200	struct urb this_urb = NULL; / spurious */
201	int err;
202
203	portdata = usb_get_serial_port_data(port);
204
205	dbg("%s: write (%d chars)", __FUNCTION__, count);
206
207	i = 0;
208	left = count;
209	for (i=0; left > 0 && i < N_OUT_URB; i++) {
210	todo = left;
211	if (todo > OUT_BUFLEN)
212	todo = OUT_BUFLEN;
213
214	this_urb = portdata->out_urbs[i];
215	if (this_urb->status == -EINPROGRESS) {
216	if (time_before(jiffies,
217	portdata->tx_start_time[i] + 10 * HZ))
218	continue;
219	usb_unlink_urb(this_urb);
220	continue;
221	}
222	if (this_urb->status != 0)
223	dbg("usb_write %p failed (err=%d)",
224	this_urb, this_urb->status);
225
226	dbg("%s: endpoint %d buf %d", __FUNCTION__,
227	usb_pipeendpoint(this_urb->pipe), i);
228
229	/* send the data */
230	memcpy (this_urb->transfer_buffer, buf, todo);
231	this_urb->transfer_buffer_length = todo;
232
233	this_urb->dev = port->serial->dev;
234	err = usb_submit_urb(this_urb, GFP_ATOMIC);
235	if (err) {
236	dbg("usb_submit_urb %p (write bulk) failed "
237	"(%d, has %d)", this_urb,
238	err, this_urb->status);
239	continue;
240	}
241	portdata->tx_start_time[i] = jiffies;
242	buf += todo;
243	left -= todo;
244	}
245
246	count -= left;
247	dbg("%s: wrote (did %d)", __FUNCTION__, count);
248	return count;
249	}
250
251	static void sierra_indat_callback(struct urb *urb)
252	{
253	int err;
254	int endpoint;
255	struct usb_serial_port *port;
256	struct tty_struct *tty;
257	unsigned char *data = urb->transfer_buffer;
258
259	dbg("%s: %p", __FUNCTION__, urb);
260
261	endpoint = usb_pipeendpoint(urb->pipe);
262	port = (struct usb_serial_port *) urb->context;
263
264	if (urb->status) {
265	dbg("%s: nonzero status: %d on endpoint %02x.",
266	__FUNCTION__, urb->status, endpoint);
267	} else {
268	tty = port->tty;
269	if (urb->actual_length) {
270	tty_buffer_request_room(tty, urb->actual_length);
271	tty_insert_flip_string(tty, data, urb->actual_length);
272	tty_flip_buffer_push(tty);
273	} else {
274	dbg("%s: empty read urb received", __FUNCTION__);
275	}
276
277	/* Resubmit urb so we continue receiving */
278	if (port->open_count && urb->status != -ESHUTDOWN) {
279	err = usb_submit_urb(urb, GFP_ATOMIC);
280	if (err)
281	printk(KERN_ERR "%s: resubmit read urb failed. "
282	"(%d)", __FUNCTION__, err);
283	}
284	}
285	return;
286	}
287
288	static void sierra_outdat_callback(struct urb *urb)
289	{
290	struct usb_serial_port *port;
291
292	dbg("%s", __FUNCTION__);
293
294	port = (struct usb_serial_port *) urb->context;
295
296	usb_serial_port_softint(port);
297	}
298
299	static void sierra_instat_callback(struct urb *urb)
300	{
301	int err;
302	struct usb_serial_port port = (struct usb_serial_port ) urb->context;
303	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
304	struct usb_serial *serial = port->serial;
305
306	dbg("%s", __FUNCTION__);
307	dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
308
309	if (urb->status == 0) {
310	struct usb_ctrlrequest *req_pkt =
311	(struct usb_ctrlrequest *)urb->transfer_buffer;
312
313	if (!req_pkt) {
314	dbg("%s: NULL req_pkt\n", __FUNCTION__);
315	return;
316	}
317	if ((req_pkt->bRequestType == 0xA1) &&
318	(req_pkt->bRequest == 0x20)) {
319	int old_dcd_state;
320	unsigned char signals = ((unsigned char )
321	urb->transfer_buffer +
322	sizeof(struct usb_ctrlrequest));
323
324	dbg("%s: signal x%x", __FUNCTION__, signals);
325
326	old_dcd_state = portdata->dcd_state;
327	portdata->cts_state = 1;
328	portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
329	portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
330	portdata->ri_state = ((signals & 0x08) ? 1 : 0);
331
332	if (port->tty && !C_CLOCAL(port->tty) &&
333	old_dcd_state && !portdata->dcd_state)
334	tty_hangup(port->tty);
335	} else {
336	dbg("%s: type %x req %x", __FUNCTION__,
337	req_pkt->bRequestType,req_pkt->bRequest);
338	}
339	} else
340	dbg("%s: error %d", __FUNCTION__, urb->status);
341
342	/* Resubmit urb so we continue receiving IRQ data */
343	if (urb->status != -ESHUTDOWN) {
344	urb->dev = serial->dev;
345	err = usb_submit_urb(urb, GFP_ATOMIC);
346	if (err)
347	dbg("%s: resubmit intr urb failed. (%d)",
348	__FUNCTION__, err);
349	}
350	}
351
352	static int sierra_write_room(struct usb_serial_port *port)
353	{
354	struct sierra_port_private *portdata;
355	int i;
356	int data_len = 0;
357	struct urb *this_urb;
358
359	portdata = usb_get_serial_port_data(port);
360
361	for (i=0; i < N_OUT_URB; i++) {
362	this_urb = portdata->out_urbs[i];
363	if (this_urb && this_urb->status != -EINPROGRESS)
364	data_len += OUT_BUFLEN;
365	}
366
367	dbg("%s: %d", __FUNCTION__, data_len);
368	return data_len;
369	}
370
371	static int sierra_chars_in_buffer(struct usb_serial_port *port)
372	{
373	struct sierra_port_private *portdata;
374	int i;
375	int data_len = 0;
376	struct urb *this_urb;
377
378	portdata = usb_get_serial_port_data(port);
379
380	for (i=0; i < N_OUT_URB; i++) {
381	this_urb = portdata->out_urbs[i];
382	if (this_urb && this_urb->status == -EINPROGRESS)
383	data_len += this_urb->transfer_buffer_length;
384	}
385	dbg("%s: %d", __FUNCTION__, data_len);
386	return data_len;
387	}
388
389	static int sierra_open(struct usb_serial_port port, struct file filp)
390	{
391	struct sierra_port_private *portdata;
392	struct usb_serial *serial = port->serial;
393	int i, err;
394	struct urb *urb;
395
396	portdata = usb_get_serial_port_data(port);
397
398	dbg("%s", __FUNCTION__);
399
400	/* Set some sane defaults */
401	portdata->rts_state = 1;
402	portdata->dtr_state = 1;
403
404	/* Reset low level data toggle and start reading from endpoints */
405	for (i = 0; i < N_IN_URB; i++) {
406	urb = portdata->in_urbs[i];
407	if (! urb)
408	continue;
409	if (urb->dev != serial->dev) {
410	dbg("%s: dev %p != %p", __FUNCTION__,
411	urb->dev, serial->dev);
412	continue;
413	}
414
415	/*
416	* make sure endpoint data toggle is synchronized with the
417	* device
418	*/
419	usb_clear_halt(urb->dev, urb->pipe);
420
421	err = usb_submit_urb(urb, GFP_KERNEL);
422	if (err) {
423	dbg("%s: submit urb %d failed (%d) %d",
424	__FUNCTION__, i, err,
425	urb->transfer_buffer_length);
426	}
427	}
428
429	/* Reset low level data toggle on out endpoints */
430	for (i = 0; i < N_OUT_URB; i++) {
431	urb = portdata->out_urbs[i];
432	if (! urb)
433	continue;
434	urb->dev = serial->dev;
435	/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
436	usb_pipeout(urb->pipe), 0); */
437	}
438
439	port->tty->low_latency = 1;
440
441	sierra_send_setup(port);
442
443	return (0);
444	}
445
446	static inline void stop_urb(struct urb *urb)
447	{
448	if (urb && urb->status == -EINPROGRESS)
449	usb_kill_urb(urb);
450	}
451
452	static void sierra_close(struct usb_serial_port port, struct file filp)
453	{
454	int i;
455	struct usb_serial *serial = port->serial;
456	struct sierra_port_private *portdata;
457
458	dbg("%s", __FUNCTION__);
459	portdata = usb_get_serial_port_data(port);
460
461	portdata->rts_state = 0;
462	portdata->dtr_state = 0;
463
464	if (serial->dev) {
465	sierra_send_setup(port);
466
467	/* Stop reading/writing urbs */
468	for (i = 0; i < N_IN_URB; i++)
469	stop_urb(portdata->in_urbs[i]);
470	for (i = 0; i < N_OUT_URB; i++)
471	stop_urb(portdata->out_urbs[i]);
472	}
473	port->tty = NULL;
474	}
475
476	/* Helper functions used by sierra_setup_urbs */
477	static struct urb sierra_setup_urb(struct usb_serial serial, int endpoint,
964ee1de GKH	478	int dir, void ctx, char buf, int len,
964ee1de GKH	479	usb_complete_t callback)
033a3fb9 KL	480	{
	481	struct urb *urb;
	482
	483	if (endpoint == -1)
	484	return NULL; /* endpoint not needed */
	485
	486	urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
	487	if (urb == NULL) {
	488	dbg("%s: alloc for endpoint %d failed.", __FUNCTION__, endpoint);
	489	return NULL;
	490	}
	491
	492	/* Fill URB using supplied data. */
	493	usb_fill_bulk_urb(urb, serial->dev,
	494	usb_sndbulkpipe(serial->dev, endpoint) \| dir,
	495	buf, len, callback, ctx);
	496
	497	return urb;
	498	}
	499
	500	/* Setup urbs */
	501	static void sierra_setup_urbs(struct usb_serial *serial)
	502	{
	503	int i,j;
	504	struct usb_serial_port *port;
	505	struct sierra_port_private *portdata;
	506
	507	dbg("%s", __FUNCTION__);
	508
	509	for (i = 0; i < serial->num_ports; i++) {
	510	port = serial->port[i];
	511	portdata = usb_get_serial_port_data(port);
	512
	513	/* Do indat endpoints first */
	514	for (j = 0; j < N_IN_URB; ++j) {
	515	portdata->in_urbs[j] = sierra_setup_urb (serial,
	516	port->bulk_in_endpointAddress, USB_DIR_IN, port,
	517	portdata->in_buffer[j], IN_BUFLEN, sierra_indat_callback);
	518	}
	519
	520	/* outdat endpoints */
	521	for (j = 0; j < N_OUT_URB; ++j) {
	522	portdata->out_urbs[j] = sierra_setup_urb (serial,
	523	port->bulk_out_endpointAddress, USB_DIR_OUT, port,
	524	portdata->out_buffer[j], OUT_BUFLEN, sierra_outdat_callback);
	525	}
	526	}
	527	}
	528
033a3fb9 KL	529	static int sierra_startup(struct usb_serial *serial)
	530	{
	531	int i, err;
	532	struct usb_serial_port *port;
	533	struct sierra_port_private *portdata;
	534
	535	dbg("%s", __FUNCTION__);
	536
	537	/* Now setup per port private data */
	538	for (i = 0; i < serial->num_ports; i++) {
	539	port = serial->port[i];
	540	portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
	541	if (!portdata) {
	542	dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
	543	__FUNCTION__, i);
	544	return (1);
	545	}
	546
	547	usb_set_serial_port_data(port, portdata);
	548
	549	if (! port->interrupt_in_urb)
	550	continue;
	551	err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
	552	if (err)
	553	dbg("%s: submit irq_in urb failed %d",
	554	__FUNCTION__, err);
	555	}
	556
	557	sierra_setup_urbs(serial);
	558
	559	return (0);
	560	}
	561
	562	static void sierra_shutdown(struct usb_serial *serial)
	563	{
	564	int i, j;
	565	struct usb_serial_port *port;
	566	struct sierra_port_private *portdata;
	567
	568	dbg("%s", __FUNCTION__);
	569
	570	/* Stop reading/writing urbs */
	571	for (i = 0; i < serial->num_ports; ++i) {
	572	port = serial->port[i];
	573	portdata = usb_get_serial_port_data(port);
	574	for (j = 0; j < N_IN_URB; j++)
	575	stop_urb(portdata->in_urbs[j]);
	576	for (j = 0; j < N_OUT_URB; j++)
	577	stop_urb(portdata->out_urbs[j]);
	578	}
	579
	580	/* Now free them */
	581	for (i = 0; i < serial->num_ports; ++i) {
	582	port = serial->port[i];
	583	portdata = usb_get_serial_port_data(port);
	584
	585	for (j = 0; j < N_IN_URB; j++) {
	586	if (portdata->in_urbs[j]) {
	587	usb_free_urb(portdata->in_urbs[j]);
	588	portdata->in_urbs[j] = NULL;
	589	}
	590	}
	591	for (j = 0; j < N_OUT_URB; j++) {
	592	if (portdata->out_urbs[j]) {
593	usb_free_urb(portdata->out_urbs[j]);
594	portdata->out_urbs[j] = NULL;
595	}
596	}
597	}
598
599	/* Now free per port private data */
600	for (i = 0; i < serial->num_ports; i++) {
601	port = serial->port[i];
602	kfree(usb_get_serial_port_data(port));
603	}
604	}
605
964ee1de GKH	606	static struct usb_serial_driver sierra_1port_device = {
	607	.driver = {
	608	.owner = THIS_MODULE,
	609	.name = "sierra1",
	610	},
	611	.description = "Sierra USB modem (1 port)",
	612	.id_table = id_table_1port,
	613	.num_interrupt_in = NUM_DONT_CARE,
	614	.num_bulk_in = 1,
	615	.num_bulk_out = 1,
	616	.num_ports = 1,
	617	.open = sierra_open,
	618	.close = sierra_close,
	619	.write = sierra_write,
	620	.write_room = sierra_write_room,
	621	.chars_in_buffer = sierra_chars_in_buffer,
	622	.throttle = sierra_rx_throttle,
	623	.unthrottle = sierra_rx_unthrottle,
	624	.ioctl = sierra_ioctl,
	625	.set_termios = sierra_set_termios,
	626	.break_ctl = sierra_break_ctl,
	627	.tiocmget = sierra_tiocmget,
	628	.tiocmset = sierra_tiocmset,
	629	.attach = sierra_startup,
	630	.shutdown = sierra_shutdown,
	631	.read_int_callback = sierra_instat_callback,
	632	};
	633
	634	static struct usb_serial_driver sierra_3port_device = {
	635	.driver = {
	636	.owner = THIS_MODULE,
	637	.name = "sierra3",
	638	},
	639	.description = "Sierra USB modem (3 port)",
	640	.id_table = id_table_3port,
	641	.num_interrupt_in = NUM_DONT_CARE,
	642	.num_bulk_in = 3,
	643	.num_bulk_out = 3,
	644	.num_ports = 3,
	645	.open = sierra_open,
	646	.close = sierra_close,
	647	.write = sierra_write,
	648	.write_room = sierra_write_room,
	649	.chars_in_buffer = sierra_chars_in_buffer,
	650	.throttle = sierra_rx_throttle,
	651	.unthrottle = sierra_rx_unthrottle,
	652	.ioctl = sierra_ioctl,
	653	.set_termios = sierra_set_termios,
	654	.break_ctl = sierra_break_ctl,
	655	.tiocmget = sierra_tiocmget,
	656	.tiocmset = sierra_tiocmset,
	657	.attach = sierra_startup,
	658	.shutdown = sierra_shutdown,
	659	.read_int_callback = sierra_instat_callback,
	660	};
	661
	662	/* Functions used by new usb-serial code. */
	663	static int __init sierra_init(void)
	664	{
	665	int retval;
	666	retval = usb_serial_register(&sierra_1port_device);
	667	if (retval)
	668	goto failed_1port_device_register;
	669	retval = usb_serial_register(&sierra_3port_device);
670	if (retval)
671	goto failed_3port_device_register;
672
673
674	retval = usb_register(&sierra_driver);
675	if (retval)
676	goto failed_driver_register;
677
678	info(DRIVER_DESC ": " DRIVER_VERSION);
679
680	return 0;
681
682	failed_driver_register:
683	usb_serial_deregister(&sierra_3port_device);
684	failed_3port_device_register:
685	usb_serial_deregister(&sierra_1port_device);
686	failed_1port_device_register:
687	return retval;
688	}
689
690	static void __exit sierra_exit(void)
691	{
692	usb_deregister (&sierra_driver);
693	usb_serial_deregister(&sierra_1port_device);
694	usb_serial_deregister(&sierra_3port_device);
695	}
696
697	module_init(sierra_init);
698	module_exit(sierra_exit);
699
033a3fb9 KL	700	MODULE_AUTHOR(DRIVER_AUTHOR);
	701	MODULE_DESCRIPTION(DRIVER_DESC);
	702	MODULE_VERSION(DRIVER_VERSION);
69de51fd	703	MODULE_LICENSE("GPL");
033a3fb9 KL	704
	705	#ifdef CONFIG_USB_DEBUG
	706	module_param(debug, bool, S_IRUGO \| S_IWUSR);
	707	MODULE_PARM_DESC(debug, "Debug messages");
	708	#endif
	709