diff -Naur linux-2.4.35.4-old/drivers/usb/serial/sierra.c linux-2.4.35.4/drivers/usb/serial/sierra.c
--- linux-2.4.35.4-old/drivers/usb/serial/sierra.c	1969-12-31 17:00:00.000000000 -0700
+++ linux-2.4.35.4/drivers/usb/serial/sierra.c	2008-01-25 10:21:25.747868456 -0700
@@ -0,0 +1,1446 @@
+/*
+ * Sierra Wireless CDMA Wireless Serial USB drive
+ * 
+ * Current Copy modified by: Kevin Lloyd <linux@sierrawireless.com>
+ * Original Copy written by: 2005 Greg Kroah-Hartman <gregkh <at> 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.
+ *
+ * Version history:
+  Version 1.03 (Lloyd):
+  Included support for DTR control and enhanced buffering (should help
+  speed).
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/mm.h>
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+
+#ifdef CONFIG_USB_SERIAL_DEBUG
+	static int debug = 1;
+#else
+	static int debug;
+#endif
+
+#include "usb-serial.h"
+#include "sierra.h"
+#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE)
+#include "pl2303.h"  // see /* BEGIN HORRIBLE HACK FOR PL2303 */ below
+#endif
+
+#define DRIVER_VERSION "v1.03"
+
+#if 0
+#define USB_VENDER_REQUEST_SET_DEVICE_POWER_STATE 0
+
+#define USB_DEVICE_POWER_STATE_D0	0x0000
+#define USB_DEVICE_POWER_STATE_D1	0x0001
+#define USB_DEVICE_POWER_STATE_D2	0x0002
+#define USB_DEVICE_POWER_STATE_D3	0x0003
+
+#define SET_CONTROL_LINE_STATE		0x22
+/*
+ * Output control lines.
+ */
+
+#define ACM_CTRL_DTR		0x01
+#define ACM_CTRL_RTS		0x02
+#endif
+
+//static int sw_attach(struct usb_serial *serial);
+static void sw_usb_serial_generic_shutdown(struct usb_serial *serial);
+
+static int  sw_usb_serial_generic_open(struct usb_serial_port *port, struct file *filp);
+static void sw_usb_serial_generic_close(struct usb_serial_port *port, struct file *filp);
+
+#if 1
+/*-----------------------------------------------------------*/
+static int                      serial_refcount;
+static struct tty_driver        serial_tty_driver;
+static struct tty_struct *      serial_tty[SERIAL_TTY_MINORS];
+static struct termios *         serial_termios[SERIAL_TTY_MINORS];
+static struct termios *         serial_termios_locked[SERIAL_TTY_MINORS];
+static struct usb_serial        *serial_table[SERIAL_TTY_MINORS];       /* initially all NULL */
+
+static LIST_HEAD(usb_serial_driver_list);
+static struct usb_serial *get_free_serial (int num_ports, int *minor);
+static void generic_write_bulk_callback (struct urb *urb);
+static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum,const struct usb_device_id *id);
+static void usb_serial_disconnect(struct usb_device *dev, void *ptr);
+static void sw_usb_serial_generic_read_bulk_callback (struct urb *urb);
+static void port_softint(void *private);
+static void return_serial (struct usb_serial *serial);
+static struct usb_serial *get_free_serial (int num_ports, int *minor);
+static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data);
+/*-----------------------------------------------------------*/
+
+#endif
+
+
+static struct usb_device_id id_table [] = {
+	{ USB_DEVICE(0x1199, 0x0017) },	/* Sierra Wireless EM5625 */
+	{ USB_DEVICE(0x1199, 0x0018) },	/* Sierra Wireless MC5720 */
+	{ USB_DEVICE(0x1199, 0x0218) },	/* Sierra Wireless MC5720 */
+	{ USB_DEVICE(0x0f30, 0x1b1d) },	/* Sierra Wireless MC5720 */
+	{ USB_DEVICE(0x1199, 0x0020) },	/* Sierra Wireless MC5725 */
+	{ USB_DEVICE(0x1199, 0x0220) },	/* Sierra Wireless MC5725 */
+	{ USB_DEVICE(0x1199, 0x0019) },	/* Sierra Wireless AirCard 595 */
+	{ USB_DEVICE(0x1199, 0x0021) },	/* Sierra Wireless AirCard 597E */
+	{ USB_DEVICE(0x1199, 0x0120) },	/* Sierra Wireless USB Dongle 595U */
+	{ USB_DEVICE(0x1199, 0x0023) },	/* Sierra Wireless C597 */
+
+	{ USB_DEVICE(0x1199, 0x6802) },	/* Sierra Wireless MC8755 */
+	{ USB_DEVICE(0x1199, 0x6804) },	/* Sierra Wireless MC8755 */
+	{ USB_DEVICE(0x1199, 0x6803) },	/* Sierra Wireless MC8765 */
+	{ USB_DEVICE(0x1199, 0x6812) },	/* Sierra Wireless MC8775 & AC 875U */
+	{ USB_DEVICE(0x1199, 0x6813) },	/* Sierra Wireless MC8775 (Thinkpad internal) */
+	{ USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
+	{ USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
+	{ USB_DEVICE(0x1199, 0x6820) },	/* Sierra Wireless AirCard 875 */
+	{ USB_DEVICE(0x1199, 0x6821) },	/* Sierra Wireless AirCard 875U */
+	{ USB_DEVICE(0x1199, 0x6832) },	/* Sierra Wireless MC8780*/
+	{ USB_DEVICE(0x1199, 0x6833) },	/* Sierra Wireless MC8781*/
+	{ USB_DEVICE(0x1199, 0x683B) },	/* Sierra Wireless MC8785 Composite*/
+	{ USB_DEVICE(0x1199, 0x6850) },	/* Sierra Wireless AirCard 880 */
+	{ USB_DEVICE(0x1199, 0x6851) },	/* Sierra Wireless AirCard 881 */
+	{ USB_DEVICE(0x1199, 0x6852) },	/* Sierra Wireless AirCard 880 E */
+	{ USB_DEVICE(0x1199, 0x6853) },	/* Sierra Wireless AirCard 881 E */
+	{ USB_DEVICE(0x1199, 0x6855) },	/* Sierra Wireless AirCard 880 U */
+	{ USB_DEVICE(0x1199, 0x6856) },	/* Sierra Wireless AirCard 881 U */
+	{ USB_DEVICE(0x1199, 0x6859) },	/* Sierra Wireless AirCard 885 E */
+	{ USB_DEVICE(0x1199, 0x685A) },	/* Sierra Wireless AirCard 885 E */
+
+	{ USB_DEVICE(0x1199, 0x6468) }, /* Sierra Wireless MP3G - EVDO */
+	{ USB_DEVICE(0x1199, 0x6469) }, /* Sierra Wireless MP3G - UMTS/HSPA */
+
+	{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
+	{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra Wireless PC 5220 */
+	{ USB_DEVICE(0x05C6, 0x6613) }, /* Onda H600/ZTE MF330 */
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver sierra_driver = {
+//	.owner =	THIS_MODULE,
+	.name =		"Sierra wireless",
+	.probe =	usb_serial_probe,
+	.disconnect =	usb_serial_disconnect,
+	.id_table =	id_table,
+};
+
+static struct usb_serial_device_type sierra_device = {
+//	.driver = {
+	.owner =		THIS_MODULE,
+	.name =			"Sierra Wireless",
+//	},
+	.id_table =		id_table,
+	.num_interrupt_in =	NUM_DONT_CARE,
+	.num_bulk_in =		NUM_DONT_CARE,
+	.num_bulk_out =		NUM_DONT_CARE,
+	.num_ports =		3,
+	//.startup =		sw_attach,
+	.shutdown =		sw_usb_serial_generic_shutdown,
+	.open = 		sw_usb_serial_generic_open,
+	.close = 		sw_usb_serial_generic_close,
+};
+
+#define MAX_NUM_PORTS 8
+
+/* local function prototypes */
+static int  serial_open (struct tty_struct *tty, struct file * filp);
+static void serial_close (struct tty_struct *tty, struct file * filp);
+static int  serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count);
+static int  serial_write_room (struct tty_struct *tty);
+static int  serial_chars_in_buffer (struct tty_struct *tty);
+static void serial_throttle (struct tty_struct * tty);
+static void serial_unthrottle (struct tty_struct * tty);
+static int  serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg);
+static void serial_set_termios (struct tty_struct *tty, struct termios * old);
+//static void serial_shutdown (struct usb_serial *serial);
+static void serial_break (struct tty_struct *tty, int break_state);
+static int generic_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count);
+static int generic_write_room (struct usb_serial_port *port);
+static void generic_cleanup (struct usb_serial_port *port);
+static int generic_chars_in_buffer (struct usb_serial_port *port);
+//static void generic_shutdown (struct usb_serial *serial);
+
+#if 1
+static struct tty_driver serial_tty_driver = {
+        .magic =                TTY_DRIVER_MAGIC,
+        .driver_name =          "usb-serial",
+#ifndef CONFIG_DEVFS_FS
+        .name =                 "ttyUSB",
+#else
+        .name =                 "usb/tts/%d",
+#endif
+        .major =                SERIAL_TTY_MAJOR,
+        .minor_start =          0,
+        .num =                  SERIAL_TTY_MINORS,
+        .type =                 TTY_DRIVER_TYPE_SERIAL,
+        .subtype =              SERIAL_TYPE_NORMAL,
+        .flags =                TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
+
+        .refcount =             &serial_refcount,
+        .table =                serial_tty,
+        .termios =              serial_termios,
+        .termios_locked =       serial_termios_locked,
+
+        .open =                 serial_open,
+        .close =                serial_close,
+        .write =                serial_write,
+        .write_room =           serial_write_room,
+        .ioctl =                serial_ioctl,
+        .set_termios =          serial_set_termios,
+        .throttle =             serial_throttle,
+        .unthrottle =           serial_unthrottle,
+        .break_ctl =            serial_break,
+        .chars_in_buffer =      serial_chars_in_buffer,
+        .read_proc =            serial_read_proc,
+};
+#endif
+
+
+/*****************************************************************************
+ * Driver tty interface functions
+ *****************************************************************************/
+static struct usb_serial *get_serial_by_minor (unsigned int minor)
+{
+        return serial_table[minor];
+}
+
+static int serial_open (struct tty_struct *tty, struct file * filp)
+{
+	struct usb_serial *serial;
+	struct usb_serial_port *port;
+	unsigned int portNumber;
+	int retval = 0;
+	
+	dbg("%s", __FUNCTION__);
+
+	/* initialize the pointer incase something fails */
+	tty->driver_data = NULL;
+
+	/* get the serial object associated with this tty pointer */
+	serial = get_serial_by_minor (MINOR(tty->device));
+
+	if (serial_paranoia_check (serial, __FUNCTION__))
+		return -ENODEV;
+
+	/* set up our port structure making the tty driver remember our port object, and us it */
+	portNumber = MINOR(tty->device) - serial->minor;
+	port = &serial->port[portNumber];
+	tty->driver_data = port;
+
+	down (&port->sem);
+	port->tty = tty;
+	 
+	/* lock this module before we call it */
+	if (serial->type->owner)
+		__MOD_INC_USE_COUNT(serial->type->owner);
+
+	++port->open_count;
+	if (port->open_count == 1) {
+		/* only call the device specific open if this 
+		 * is the first time the port is opened */
+		if (serial->type->open)
+			retval = serial->type->open(port, filp);
+		else
+			retval = sw_usb_serial_generic_open(port, filp);//@.@
+	}
+
+	if (retval) {
+		port->open_count = 0;
+		if (serial->type->owner)
+			__MOD_DEC_USE_COUNT(serial->type->owner);
+	}
+
+	up (&port->sem);
+	return retval;
+}
+
+static void __serial_close(struct usb_serial_port *port, struct file *filp)
+{
+	if (!port->open_count) {
+		dbg ("%s - port not opened", __FUNCTION__);
+		return;
+	}
+
+	--port->open_count;
+	if (port->open_count <= 0) {
+		/* only call the device specific close if this 
+		 * port is being closed by the last owner */
+		if (port->serial->type->close)
+			port->serial->type->close(port, filp);
+		else
+			//generic_close(port, filp);
+			sw_usb_serial_generic_close(port, filp);
+		port->open_count = 0;
+	}
+
+	if (port->serial->type->owner)
+		__MOD_DEC_USE_COUNT(port->serial->type->owner);
+}
+
+static void serial_close(struct tty_struct *tty, struct file * filp)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
+		return;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	/* if disconnect beat us to the punch here, there's nothing to do */
+	if (tty->driver_data) {
+		__serial_close(port, filp);
+	}
+
+	up (&port->sem);
+}
+
+static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+	int retval = -EINVAL;
+
+	if (!serial)
+		return -ENODEV;
+
+	down (&port->sem);
+
+	dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
+
+	if (!port->open_count) {
+		dbg("%s - port not opened", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->write)
+		retval = serial->type->write(port, from_user, buf, count);
+	else
+		retval = generic_write(port, from_user, buf, count);
+
+exit:
+	up (&port->sem);
+	return retval;
+}
+
+static int serial_write_room (struct tty_struct *tty) 
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+	int retval = -EINVAL;
+
+	if (!serial)
+		return -ENODEV;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->write_room)
+		retval = serial->type->write_room(port);
+	else
+		retval = generic_write_room(port);
+
+exit:
+	up (&port->sem);
+	return retval;
+}
+
+static int serial_chars_in_buffer (struct tty_struct *tty) 
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+	int retval = -EINVAL;
+
+	if (!serial)
+		return -ENODEV;
+
+	down (&port->sem);
+
+	dbg("%s = port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->chars_in_buffer)
+		retval = serial->type->chars_in_buffer(port);
+	else
+		retval = generic_chars_in_buffer(port);
+
+exit:
+	up (&port->sem);
+	return retval;
+}
+
+static void serial_throttle (struct tty_struct * tty)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
+		return;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg ("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function */
+	if (serial->type->throttle)
+		serial->type->throttle(port);
+
+exit:
+	up (&port->sem);
+}
+
+static void serial_unthrottle (struct tty_struct * tty)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
+		return;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function */
+	if (serial->type->unthrottle)
+		serial->type->unthrottle(port);
+
+exit:
+	up (&port->sem);
+}
+
+static int serial_ioctl (struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+	int retval = -ENODEV;
+
+	if (!serial)
+		return -ENODEV;
+
+	down (&port->sem);
+
+	dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
+
+	if (!port->open_count) {
+		dbg ("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->ioctl)
+		retval = serial->type->ioctl(port, file, cmd, arg);
+	else
+		retval = -ENOIOCTLCMD;
+
+exit:
+	up (&port->sem);
+	return retval;
+}
+
+static void serial_set_termios (struct tty_struct *tty, struct termios * old)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
+		return;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->set_termios)
+		serial->type->set_termios(port, old);
+
+exit:
+	up (&port->sem);
+}
+
+static void serial_break (struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *) tty->driver_data;
+	struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+	if (!serial)
+		return;
+
+	down (&port->sem);
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (!port->open_count) {
+		dbg("%s - port not open", __FUNCTION__);
+		goto exit;
+	}
+
+	/* pass on to the driver specific version of this function if it is available */
+	if (serial->type->break_ctl)
+		serial->type->break_ctl(port, break_state);
+
+exit:
+	up (&port->sem);
+}
+#if 0
+static void serial_shutdown (struct usb_serial *serial)
+{
+	dbg ("%s", __FUNCTION__);
+
+	if (serial->type->shutdown)
+		serial->type->shutdown(serial);
+	else
+		generic_shutdown(serial);
+}
+#endif
+static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	struct usb_serial *serial;
+	int length = 0;
+	int i;
+	off_t begin = 0;
+	char tmp[40];
+
+	dbg("%s", __FUNCTION__);
+	length += sprintf (page, "usbserinfo:1.0 driver:%s\n", DRIVER_VERSION);
+	for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) {
+		serial = get_serial_by_minor(i);
+		if (serial == NULL)
+			continue;
+
+		length += sprintf (page+length, "%d:", i);
+		if (serial->type->owner)
+			length += sprintf (page+length, " module:%s", serial->type->owner->name);
+		length += sprintf (page+length, " name:\"%s\"", serial->type->name);
+		length += sprintf (page+length, " vendor:%04x product:%04x", serial->vendor, serial->product);
+		length += sprintf (page+length, " num_ports:%d", serial->num_ports);
+		length += sprintf (page+length, " port:%d", i - serial->minor + 1);
+
+		usb_make_path(serial->dev, tmp, sizeof(tmp));
+		length += sprintf (page+length, " path:%s", tmp);
+			
+		length += sprintf (page+length, "\n");
+		if ((length + begin) > (off + count))
+			goto done;
+		if ((length + begin) < off) {
+			begin += length;
+			length = 0;
+		}
+	}
+	*eof = 1;
+done:
+	if (off >= (length + begin))
+		return 0;
+	*start = page + (off-begin);
+	return ((count < begin+length-off) ? count : begin+length-off);
+}
+
+
+/*-----------------------------------------------------------*/
+static int generic_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count)
+{
+        struct usb_serial *serial = port->serial;
+        int result;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (count == 0) {
+                dbg("%s - write request of 0 bytes", __FUNCTION__);
+                return (0);
+        }
+
+        /* only do something if we have a bulk out endpoint */
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status == -EINPROGRESS) {
+                        dbg("%s - already writing", __FUNCTION__);
+                        return (0);
+                }
+
+                count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
+
+                if (from_user) {
+                        if (copy_from_user(port->write_urb->transfer_buffer, buf, count))
+                                return -EFAULT;
+                }
+                else {
+                        memcpy (port->write_urb->transfer_buffer, buf, count);
+                }
+
+                usb_serial_debug_data (__FILE__, __FUNCTION__, count, port->write_urb->transfer_buffer);
+
+                /* set up our urb */
+                usb_fill_bulk_urb (port->write_urb, serial->dev,
+                                   usb_sndbulkpipe (serial->dev,
+                                                    port->bulk_out_endpointAddress),
+                                   port->write_urb->transfer_buffer, count,
+                                   ((serial->type->write_bulk_callback) ?
+                                     serial->type->write_bulk_callback :
+                                     generic_write_bulk_callback), port);
+
+                /* send the data out the bulk port */
+                result = usb_submit_urb(port->write_urb);
+                if (result)
+                        err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
+                else
+                        result = count;
+
+                return result;
+        }
+
+        /* no bulk out, so return 0 bytes written */
+        return (0);
+}
+
+static int generic_write_room (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+        int room = 0;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status != -EINPROGRESS)
+                        room = port->bulk_out_size;
+        }
+
+        dbg("%s - returns %d", __FUNCTION__, room);
+        return (room);
+}
+
+static int generic_chars_in_buffer (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+        int chars = 0;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status == -EINPROGRESS)
+                        chars = port->write_urb->transfer_buffer_length;
+        }
+
+        dbg("%s - returns %d", __FUNCTION__, chars);
+        return (chars);
+}
+#if 0
+static void generic_shutdown (struct usb_serial *serial)
+{
+        int i;
+
+        dbg("%s", __FUNCTION__);
+
+        /* stop reads and writes on all ports */
+        for (i=0; i < serial->num_ports; ++i) {
+                generic_cleanup (&serial->port[i]);
+        }
+}
+static void generic_cleanup (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (serial->dev) {
+                /* shutdown any bulk reads that might be going on */
+                if (serial->num_bulk_out)
+                        usb_unlink_urb (port->write_urb);
+                if (serial->num_bulk_in)
+                        usb_unlink_urb (port->read_urb);
+        }
+}
+#endif
+/*----------------------------------------------------------*/
+static void generic_write_bulk_callback (struct urb *urb)
+{
+        struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+        struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (!serial) {
+                dbg("%s - bad serial pointer, exiting", __FUNCTION__);
+                return;
+        }
+
+        if (urb->status) {
+                dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+                return;
+        }
+
+        queue_task(&port->tqueue, &tq_immediate);
+        mark_bh(IMMEDIATE_BH);
+
+        return;
+}
+
+static struct usb_serial *get_free_serial (int num_ports, int *minor)
+{
+        struct usb_serial *serial = NULL;
+        int i, j;
+        int good_spot;
+
+        dbg("%s %d", __FUNCTION__, num_ports);
+
+        *minor = 0;
+        for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
+                if (serial_table[i])
+                        continue;
+
+                good_spot = 1;
+                for (j = 1; j <= num_ports-1; ++j)
+                        if (serial_table[i+j])
+                                good_spot = 0;
+                if (good_spot == 0)
+                        continue;
+
+                if (!(serial = kmalloc(sizeof(struct usb_serial), GFP_KERNEL))) {
+                        err("%s - Out of memory", __FUNCTION__);
+                        return NULL;
+                }
+                memset(serial, 0, sizeof(struct usb_serial));
+                serial->magic = USB_SERIAL_MAGIC;
+                serial_table[i] = serial;
+                *minor = i;
+                dbg("%s - minor base = %d", __FUNCTION__, *minor);
+                for (i = *minor+1; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i)
+                        serial_table[i] = serial;
+                return serial;
+        }
+        return NULL;
+}
+
+static void return_serial (struct usb_serial *serial)
+{
+        int i;
+
+        dbg("%s", __FUNCTION__);
+
+        if (serial == NULL)
+                return;
+
+        for (i = 0; i < serial->num_ports; ++i) {
+                serial_table[serial->minor + i] = NULL;
+        }
+
+        return;
+}
+
+static void port_softint(void *private)
+{
+        struct usb_serial_port *port = (struct usb_serial_port *)private;
+        struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
+        struct tty_struct *tty;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (!serial)
+                return;
+
+        tty = port->tty;
+        if (!tty)
+                return;
+
+        if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
+                dbg("%s - write wakeup call.", __FUNCTION__);
+                (tty->ldisc.write_wakeup)(tty);
+        }
+
+        wake_up_interruptible(&tty->write_wait);
+}
+
+
+static void * usb_serial_probe(struct usb_device *dev, unsigned int ifnum,
+                               const struct usb_device_id *id)
+{
+        struct usb_serial *serial = NULL;
+        struct usb_serial_port *port;
+        struct usb_interface *interface;
+        struct usb_interface_descriptor *iface_desc;
+        struct usb_endpoint_descriptor *endpoint;
+        struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS];
+        struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS];
+        struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS];
+        struct usb_serial_device_type *type = NULL;
+        struct list_head *tmp;
+        int found;
+        int minor;
+        int buffer_size;
+        int i;
+        int num_interrupt_in = 0;
+        int num_bulk_in = 0;
+        int num_bulk_out = 0;
+        int num_ports;
+        int max_endpoints;
+        const struct usb_device_id *id_pattern = NULL;
+
+        /* loop through our list of known serial converters, and see if this
+           device matches. */
+        found = 0;
+        interface = &dev->actconfig->interface[ifnum];
+        list_for_each (tmp, &usb_serial_driver_list) {
+                type = list_entry(tmp, struct usb_serial_device_type, driver_list);
+                id_pattern = usb_match_id(dev, interface, type->id_table);
+                if (id_pattern != NULL) {
+                        dbg("descriptor matches");
+                        found = 1;
+                        break;
+                }
+        }
+        if (!found) {
+                /* no match */
+                dbg("none matched");
+                return(NULL);
+        }
+        /* descriptor matches, let's find the endpoints needed */
+        /* check out the endpoints */
+        iface_desc = &interface->altsetting[0];
+        for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
+                endpoint = &iface_desc->endpoint[i];
+
+                if ((endpoint->bEndpointAddress & 0x80) &&
+                    ((endpoint->bmAttributes & 3) == 0x02)) {
+                        /* we found a bulk in endpoint */
+                        dbg("found bulk in");
+                        bulk_in_endpoint[num_bulk_in] = endpoint;
+                        ++num_bulk_in;
+                }
+
+                if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
+                    ((endpoint->bmAttributes & 3) == 0x02)) {
+                        /* we found a bulk out endpoint */
+                        dbg("found bulk out");
+                        bulk_out_endpoint[num_bulk_out] = endpoint;
+                        ++num_bulk_out;
+                }
+
+                if ((endpoint->bEndpointAddress & 0x80) &&
+                    ((endpoint->bmAttributes & 3) == 0x03)) {
+                        /* we found a interrupt in endpoint */
+                        dbg("found interrupt in");
+                        interrupt_in_endpoint[num_interrupt_in] = endpoint;
+                        ++num_interrupt_in;
+                }
+        }
+
+#if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE)
+        /* BEGIN HORRIBLE HACK FOR PL2303 */
+        /* this is needed due to the looney way its endpoints are set up */
+        if (((dev->descriptor.idVendor == PL2303_VENDOR_ID) &&
+             (dev->descriptor.idProduct == PL2303_PRODUCT_ID)) ||
+            ((dev->descriptor.idVendor == ATEN_VENDOR_ID) &&
+             (dev->descriptor.idProduct == ATEN_PRODUCT_ID))) {
+                if (ifnum == 1) {
+                        /* check out the endpoints of the other interface*/
+                        interface = &dev->actconfig->interface[ifnum ^ 1];
+                        iface_desc = &interface->altsetting[0];
+                        for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
+                                endpoint = &iface_desc->endpoint[i];
+                                if ((endpoint->bEndpointAddress & 0x80) &&
+                                    ((endpoint->bmAttributes & 3) == 0x03)) {
+                                        /* we found a interrupt in endpoint */
+                                        dbg("found interrupt in for Prolific device on separate interface");
+                                        interrupt_in_endpoint[num_interrupt_in] = endpoint;
+                                        ++num_interrupt_in;
+                                }
+                        }
+                }
+
+                /* Now make sure the PL-2303 is configured correctly.
+                 * If not, give up now and hope this hack will work
+                 * properly during a later invocation of usb_serial_probe
+                 */
+                if (num_bulk_in == 0 || num_bulk_out == 0) {
+                        info("PL-2303 hack: descriptors matched but endpoints did not");
+                        return NULL;
+                }
+        }
+        /* END HORRIBLE HACK FOR PL2303 */
+#endif
+
+        /* found all that we need */
+        info("%s converter detected", type->name);
+
+#ifdef CONFIG_USB_SERIAL_SIERRAWIRELESS
+        if (type == &sierra_driver) {
+                num_ports = num_bulk_out;
+                if (num_ports == 0) {
+                        err("Sierra 3G device with no bulk out, not allowed.");
+                        return NULL;
+                }
+        } else
+#endif
+                num_ports = type->num_ports;
+
+        serial = get_free_serial (num_ports, &minor);
+        if (serial == NULL) {
+                err("No more free serial devices");
+                return NULL;
+        }
+
+        serial->dev = dev;
+        serial->type = type;
+        serial->interface = interface;
+        serial->minor = minor;
+        serial->num_ports = num_ports;
+        serial->num_bulk_in = num_bulk_in;
+        serial->num_bulk_out = num_bulk_out;
+        serial->num_interrupt_in = num_interrupt_in;
+        serial->vendor = dev->descriptor.idVendor;
+        serial->product = dev->descriptor.idProduct;
+
+        /* set up the endpoint information */
+        for (i = 0; i < num_bulk_in; ++i) {
+                endpoint = bulk_in_endpoint[i];
+                port = &serial->port[i];
+                port->read_urb = usb_alloc_urb (0);
+                if (!port->read_urb) {
+                        err("No free urbs available");
+                        goto probe_error;
+                }
+//Amin marked           buffer_size = endpoint->wMaxPacketSize;
+// ===> 20060310 Amin modify for improve EVDO and HSDPA Card
+                buffer_size = 2048;
+                printk("KERNEL DEBUG => USBSERIAL.O buffer_size = 2048\n");
+// <=== 20060310 Amin modify for improve EVDO and HSDPA Card
+                port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
+                port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+                if (!port->bulk_in_buffer) {
+                        err("Couldn't allocate bulk_in_buffer");
+                        goto probe_error;
+                }
+                usb_fill_bulk_urb (port->read_urb, dev,
+                                   usb_rcvbulkpipe (dev,
+                                                    endpoint->bEndpointAddress),
+                                   port->bulk_in_buffer, buffer_size,
+                                   ((serial->type->read_bulk_callback) ?
+                                     serial->type->read_bulk_callback :
+                                     sw_usb_serial_generic_read_bulk_callback),
+                                   port);
+        }
+
+        for (i = 0; i < num_bulk_out; ++i) {
+                endpoint = bulk_out_endpoint[i];
+                port = &serial->port[i];
+                port->write_urb = usb_alloc_urb(0);
+                if (!port->write_urb) {
+                        err("No free urbs available");
+                        goto probe_error;
+                }
+                buffer_size = endpoint->wMaxPacketSize;
+                port->bulk_out_size = buffer_size;
+                port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
+                port->bulk_out_buffer = kmalloc (buffer_size, GFP_KERNEL);
+                if (!port->bulk_out_buffer) {
+                        err("Couldn't allocate bulk_out_buffer");
+                        goto probe_error;
+                }
+                usb_fill_bulk_urb (port->write_urb, dev,
+                                   usb_sndbulkpipe (dev,
+                                                    endpoint->bEndpointAddress),
+                                   port->bulk_out_buffer, buffer_size,
+                                   ((serial->type->write_bulk_callback) ?
+                                     serial->type->write_bulk_callback :
+                                     generic_write_bulk_callback),
+                                   port);
+        }
+
+        for (i = 0; i < num_interrupt_in; ++i) {
+                endpoint = interrupt_in_endpoint[i];
+                port = &serial->port[i];
+                port->interrupt_in_urb = usb_alloc_urb(0);
+                if (!port->interrupt_in_urb) {
+                        err("No free urbs available");
+                        goto probe_error;
+                }
+                buffer_size = endpoint->wMaxPacketSize;
+                port->interrupt_in_endpointAddress = endpoint->bEndpointAddress;
+                port->interrupt_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
+                if (!port->interrupt_in_buffer) {
+                        err("Couldn't allocate interrupt_in_buffer");
+                        goto probe_error;
+                }
+                usb_fill_int_urb (port->interrupt_in_urb, dev,
+                                  usb_rcvintpipe (dev,
+                                                  endpoint->bEndpointAddress),
+                                  port->interrupt_in_buffer, buffer_size,
+                                  serial->type->read_int_callback, port,
+                                  endpoint->bInterval);
+        }
+
+        /* initialize some parts of the port structures */
+        /* we don't use num_ports here cauz some devices have more endpoint pairs than ports */
+        max_endpoints = max(num_bulk_in, num_bulk_out);
+        max_endpoints = max(max_endpoints, num_interrupt_in);
+        max_endpoints = max(max_endpoints, (int)serial->num_ports);
+        dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
+        for (i = 0; i < max_endpoints; ++i) {
+                port = &serial->port[i];
+                port->number = i + serial->minor;
+                port->serial = serial;
+                port->magic = USB_SERIAL_PORT_MAGIC;
+                port->tqueue.routine = port_softint;
+                port->tqueue.data = port;
+                init_MUTEX (&port->sem);
+        }
+
+        /* if this device type has a startup function, call it */
+        if (type->startup) {
+                i = type->startup (serial);
+                if (i < 0)
+                        goto probe_error;
+                if (i > 0)
+                        return serial;
+        }
+
+        /* initialize the devfs nodes for this device and let the user know what ports we are bound to */
+        for (i = 0; i < serial->num_ports; ++i) {
+                tty_register_devfs (&serial_tty_driver, 0, serial->port[i].number);
+                info("%s converter now attached to ttyUSB%d (or usb/tts/%d for devfs)",
+                     type->name, serial->port[i].number, serial->port[i].number);
+        }
+
+        return serial; /* success */
+
+
+probe_error:
+        for (i = 0; i < num_bulk_in; ++i) {
+                port = &serial->port[i];
+                if (port->read_urb)
+                        usb_free_urb (port->read_urb);
+                if (port->bulk_in_buffer)
+                        kfree (port->bulk_in_buffer);
+        }
+        for (i = 0; i < num_bulk_out; ++i) {
+                port = &serial->port[i];
+                if (port->write_urb)
+                        usb_free_urb (port->write_urb);
+                if (port->bulk_out_buffer)
+                        kfree (port->bulk_out_buffer);
+        }
+        for (i = 0; i < num_interrupt_in; ++i) {
+                port = &serial->port[i];
+                if (port->interrupt_in_urb)
+                        usb_free_urb (port->interrupt_in_urb);
+                if (port->interrupt_in_buffer)
+                        kfree (port->interrupt_in_buffer);
+        }
+
+        /* return the minor range that this device had */
+        return_serial (serial);
+
+        /* free up any memory that we allocated */
+        kfree (serial);
+        return NULL;
+}
+
+static void usb_serial_disconnect(struct usb_device *dev, void *ptr)
+{
+        struct usb_serial *serial = (struct usb_serial *) ptr;
+        struct usb_serial_port *port;
+        int i;
+
+        dbg ("%s", __FUNCTION__);
+        if (serial) {
+                /* fail all future close/read/write/ioctl/etc calls */
+                for (i = 0; i < serial->num_ports; ++i) {
+                        port = &serial->port[i];
+                        down (&port->sem);
+                        if (port->tty != NULL) {
+                                while (port->open_count > 0) {
+                                        //__serial_close(port, NULL);
+					sw_usb_serial_generic_close(port,NULL);
+                                }
+                                port->tty->driver_data = NULL;
+                        }
+                        up (&port->sem);
+                }
+
+                serial->dev = NULL;
+                //serial_shutdown (serial);
+		sw_usb_serial_generic_shutdown(serial);
+
+                for (i = 0; i < serial->num_ports; ++i)
+                        serial->port[i].open_count = 0;
+
+                for (i = 0; i < serial->num_bulk_in; ++i) {
+                        port = &serial->port[i];
+                        if (port->read_urb) {
+                                usb_unlink_urb (port->read_urb);
+                                usb_free_urb (port->read_urb);
+                        }
+                        if (port->bulk_in_buffer)
+                                kfree (port->bulk_in_buffer);
+                }
+                for (i = 0; i < serial->num_bulk_out; ++i) {
+                        port = &serial->port[i];
+                        if (port->write_urb) {
+                                usb_unlink_urb (port->write_urb);
+                                usb_free_urb (port->write_urb);
+                        }
+                        if (port->bulk_out_buffer)
+                                kfree (port->bulk_out_buffer);
+                }
+                for (i = 0; i < serial->num_interrupt_in; ++i) {
+                        port = &serial->port[i];
+                        if (port->interrupt_in_urb) {
+                                usb_unlink_urb (port->interrupt_in_urb);
+                                usb_free_urb (port->interrupt_in_urb);
+                        }
+                        if (port->interrupt_in_buffer)
+                                kfree (port->interrupt_in_buffer);
+                }
+
+                for (i = 0; i < serial->num_ports; ++i) {
+                        tty_unregister_devfs (&serial_tty_driver, serial->port[i].number);
+                        info("%s converter now disconnected from ttyUSB%d", serial->type->name, serial->port[i].number);
+                }
+
+                /* return the minor range that this device had */
+                return_serial (serial);
+
+                /* free up any memory that we allocated */
+                kfree (serial);
+
+        } else {
+                info("device disconnected");
+        }
+
+}
+
+#if 0
+static int sw_attach(struct usb_serial *serial)
+{
+	struct usb_device *hdev = serial->dev;
+	int rc;
+
+	dbg("%s - serial(0x%p)", __FUNCTION__, serial);
+	
+	rc = usb_control_msg(
+		hdev, 
+		usb_sndctrlpipe(hdev, 0),
+		USB_VENDER_REQUEST_SET_DEVICE_POWER_STATE,	/* bRequest */ 
+		USB_TYPE_VENDOR|USB_RECIP_DEVICE, 		/* bmRequestType */
+		USB_DEVICE_POWER_STATE_D0, 			/* wValue */
+		0,						/* wIndex */
+		NULL, 						/* Data */
+		0, 						/* wLength */
+		1000);						/* Timeout */
+
+	err("%s - rc(%d)", __FUNCTION__, rc);
+	return rc;
+}
+#endif
+//void sw_usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+static void sw_usb_serial_generic_read_bulk_callback (struct urb *urb)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+	struct usb_serial *serial = port->serial;
+	struct tty_struct *tty;
+	unsigned char *data = urb->transfer_buffer;
+	int result;
+	int i;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (urb->status) {
+		dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
+		return;
+	}
+
+	//usb_serial_dbg_data(__FILE__,  __FUNCTION__, urb->actual_length, data);
+
+	tty = port->tty;
+	if (tty && urb->actual_length) {
+	   #if 0
+		tty_buffer_request_room(tty, urb->actual_length);
+		tty_insert_flip_string(tty, data, urb->actual_length);
+	  	tty_flip_buffer_push(tty);
+           #endif
+           #if 1
+                for (i = 0; i < urb->actual_length ; ++i) {
+                        /* if we insert more than TTY_FLIPBUF_SIZE characters, we drop them. */
+                        if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
+                                tty_flip_buffer_push(tty);
+                        }
+                        /* this doesn't actually push the data through unless tty->low_latency is set */
+                        tty_insert_flip_char(tty, data[i], 0);
+                }
+                tty_flip_buffer_push(tty);
+           #endif
+
+	}
+	else
+		dbg("%s: empty read urb received", __FUNCTION__);
+
+	/* Continue trying to always read  */
+	usb_fill_bulk_urb (port->read_urb, serial->dev,
+			   usb_rcvbulkpipe (serial->dev,
+				   	    port->bulk_in_endpointAddress),
+			   port->read_urb->transfer_buffer,
+			   port->read_urb->transfer_buffer_length,
+			   ((serial->type->read_bulk_callback) ? 
+			     serial->type->read_bulk_callback : 
+			     sw_usb_serial_generic_read_bulk_callback), port);
+	result = usb_submit_urb(port->read_urb);
+        //result = usb_submit_urb(port->read_urb, GFP_ATOMIC); //for kernel 2.6
+	if (result)
+		dbg("%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+}
+#if 1
+static int generic_open (struct usb_serial_port *port, struct file *filp)
+{
+	struct usb_serial *serial = port->serial;
+	int result = 0;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	/* force low_latency on so that our tty_push actually forces the data through, 
+	   otherwise it is scheduled, and with high data rates (like with OHCI) data
+	   can get lost. */
+	if (port->tty)
+		port->tty->low_latency = 1;
+
+	/* if we have a bulk interrupt, start reading from it */
+	if (serial->num_bulk_in) {
+		/* Start reading from the device */
+		usb_fill_bulk_urb (port->read_urb, serial->dev,
+				   usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
+				   port->read_urb->transfer_buffer,
+				   port->read_urb->transfer_buffer_length,
+				   ((serial->type->read_bulk_callback) ?
+				     serial->type->read_bulk_callback :
+				     sw_usb_serial_generic_read_bulk_callback),
+				   port);
+		result = usb_submit_urb(port->read_urb); //, GFP_KERNEL);
+		if (result)
+			//dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+			dbg("%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+
+	}
+
+	return result;
+}
+#endif
+int sw_usb_serial_generic_open (struct usb_serial_port *port, struct file *filp)
+{
+	int rc;
+	struct usb_serial *serial = port->serial;
+	struct usb_device *hdev = serial->dev;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	rc = generic_open(port, filp);
+	err("%s - rc(%d)", __FUNCTION__, rc);
+
+	if(0 == rc)
+	{
+		rc = usb_control_msg(
+			hdev, 
+			usb_sndctrlpipe(hdev, 0),
+			SET_CONTROL_LINE_STATE,				/* bRequest */ 
+			USB_TYPE_CLASS|USB_RECIP_INTERFACE, 		/* bmRequestType */
+			ACM_CTRL_DTR|ACM_CTRL_RTS,			/* wValue */
+			0,						/* wIndex */
+			NULL, 						/* Data */
+			0, 						/* wLength */
+			1000);						/* Timeout */
+		err("%s - usb_control_msg: rc(%d)", __FUNCTION__, rc);
+	}
+
+	return rc;
+}
+
+static void generic_cleanup (struct usb_serial_port *port)
+{
+	struct usb_serial *serial = port->serial;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (serial->dev) {
+		/* shutdown any bulk reads that might be going on */
+		if (serial->num_bulk_out)
+			usb_unlink_urb(port->write_urb);
+			//usb_kill_urb(port->write_urb);
+		if (serial->num_bulk_in)
+			usb_unlink_urb(port->read_urb);
+			//usb_kill_urb(port->read_urb);
+	}
+}
+
+static void sw_usb_serial_generic_close (struct usb_serial_port *port, struct file * filp)
+{
+	int rc;
+	struct usb_serial *serial = port->serial;
+	struct usb_device *hdev = serial->dev;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	rc = usb_control_msg(
+		hdev, 
+		usb_sndctrlpipe(hdev, 0),
+		SET_CONTROL_LINE_STATE,				/* bRequest */ 
+		USB_TYPE_CLASS|USB_RECIP_INTERFACE, 		/* bmRequestType */
+		0, 						/* wValue */
+		0,						/* wIndex */
+		NULL, 						/* Data */
+		0, 						/* wLength */
+		1000);						/* Timeout */
+	err("%s - rc(%d)", __FUNCTION__, rc);
+	
+	generic_cleanup (port);
+}
+
+static void sw_usb_serial_generic_shutdown(struct usb_serial *serial)
+{
+	int i, rc;
+	struct usb_device *hdev = serial->dev;
+
+	dbg("%s serial(0x%p)", __FUNCTION__, serial);
+
+	if(hdev)
+	{
+		rc = usb_control_msg(
+			hdev, 
+			usb_sndctrlpipe(hdev, 0),
+			USB_VENDER_REQUEST_SET_DEVICE_POWER_STATE,	/* bRequest */ 
+			USB_TYPE_VENDOR|USB_RECIP_DEVICE, 		/* bmRequestType */
+			USB_DEVICE_POWER_STATE_D3, 			/* wValue */
+			0,						/* wIndex */
+			NULL, 						/* Data */
+			0, 						/* wLength */
+			1000);						/* Timeout */
+		err("%s - rc(%d)", __FUNCTION__, rc);
+	}
+
+	/* stop reads and writes on all ports */
+	for (i=0; i < serial->num_ports; ++i) {
+		generic_cleanup(&serial->port[i]);
+	}
+}
+int usb_serial_register(struct usb_serial_device_type *new_device)
+{
+        /* Add this device to our list of devices */
+        list_add(&new_device->driver_list, &usb_serial_driver_list);
+
+        info ("USB Serial support registered for %s", new_device->name);
+
+        usb_scan_devices();
+
+        return 0;
+}
+
+
+void usb_serial_deregister(struct usb_serial_device_type *device)
+{
+        struct usb_serial *serial;
+        int i;
+
+        info("USB Serial deregistering driver %s", device->name);
+
+        /* clear out the serial_table if the device is attached to a port */
+        for(i = 0; i < SERIAL_TTY_MINORS; ++i) {
+                serial = serial_table[i];
+                if ((serial != NULL) && (serial->type == device)) {
+                        usb_driver_release_interface (&sierra_driver, serial->interface);
+                        usb_serial_disconnect (NULL, serial);
+                }
+        }
+
+        list_del(&device->driver_list);
+}
+
+static int __init sierra_init(void)
+{
+	int retval;
+	int i;
+
+        /* Initalize our global data */
+        for (i = 0; i < SERIAL_TTY_MINORS; ++i) {
+                serial_table[i] = NULL;
+        }
+
+        /* register the tty driver */
+        serial_tty_driver.init_termios          = tty_std_termios;
+        serial_tty_driver.init_termios.c_cflag  = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+        if (tty_register_driver (&serial_tty_driver)) {
+                err("%s - failed to register tty driver", __FUNCTION__);
+                return -1;
+        }
+
+	retval = usb_serial_register(&sierra_device);
+	if (retval)
+	{
+		tty_unregister_driver(&serial_tty_driver);
+		printk("%s return usb_serial_register. retval=[%d].\n",__FUNCTION__, retval);
+		return retval;
+	}
+	retval = usb_register(&sierra_driver);
+        if (retval){
+		usb_serial_deregister(&sierra_device);
+                tty_unregister_driver(&serial_tty_driver);
+                err("usb_register failed for the Sierra 3G USB-Serial driver. Error number %d\n", retval);
+                return -1;
+        }
+
+	return retval;
+}
+
+static void __exit sierra_exit(void)
+{
+	usb_deregister(&sierra_driver);
+	usb_serial_deregister(&sierra_device);
+}
+
+module_init(sierra_init);
+module_exit(sierra_exit);
+MODULE_LICENSE("GPL");
diff -Naur linux-2.4.35.4-old/drivers/usb/serial/sierra.h linux-2.4.35.4/drivers/usb/serial/sierra.h
--- linux-2.4.35.4-old/drivers/usb/serial/sierra.h	1969-12-31 17:00:00.000000000 -0700
+++ linux-2.4.35.4/drivers/usb/serial/sierra.h	2008-01-25 10:15:35.640743578 -0700
@@ -0,0 +1,32 @@
+/*
+ * Sierra Wireless CDMA Wireless Serial USB drive
+ * 
+ * Current Copy modified by: Kevin Lloyd <linux@sierrawireless.com>
+ * Original Copy written by: 2005 Greg Kroah-Hartman <gregkh <at> 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.
+ *
+ * Version history:
+  Version 1.03 (Lloyd):
+  Included support for DTR control and enhanced buffering (should help
+  speed).
+ */
+
+#define USB_VENDER_REQUEST_SET_DEVICE_POWER_STATE 0
+
+#define USB_DEVICE_POWER_STATE_D0       0x0000
+#define USB_DEVICE_POWER_STATE_D1       0x0001
+#define USB_DEVICE_POWER_STATE_D2       0x0002
+#define USB_DEVICE_POWER_STATE_D3       0x0003
+
+#define SET_CONTROL_LINE_STATE          0x22
+/*
+ * Output control lines.
+ */
+
+#define ACM_CTRL_DTR            0x01
+#define ACM_CTRL_RTS            0x02
+
