add mos7720 driver

1 files changed, 2172 insertions, 0 deletions

diff --git a/usb/usb-serial-mos7720.patch b/usb/usb-serial-mos7720.patch
new file mode 100644
index 0000000000000..a4a116e16324c
--- /dev/null
+++ b/usb/usb-serial-mos7720.patch
@@ -0,0 +1,2172 @@
+From: Greg Kroah-Hartman <gregkh@suse.de>
+Subject: USB: add USB serial mos7720 driver
+
+Add support for Moschip 7720 USB dual port usb to serial device.
+
+This driver is originally based on the drivers/usb/io_edgeport.c driver.
+
+Cleaned up and forward ported by me.
+
+(yes, I know it still doesn't follow coding standard, am still fixing it up...)
+
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+
+---
+ drivers/usb/serial/Kconfig   |   10 
+ drivers/usb/serial/Makefile  |    1 
+ drivers/usb/serial/mos7720.c | 2121 +++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 2132 insertions(+)
+
+--- gregkh-2.6.orig/drivers/usb/serial/Kconfig
++++ gregkh-2.6/drivers/usb/serial/Kconfig
+@@ -422,6 +422,16 @@ config USB_SERIAL_MCT_U232
+ 	  To compile this driver as a module, choose M here: the
+ 	  module will be called mct_u232.
+ 
++config USB_SERIAL_MOS7720
++	tristate "USB Moschip 7720 Single Port Serial Driver"
++	depends on USB_SERIAL
++	---help---
++	  Say Y here if you want to use a USB Serial single port adapter from
++	  Moschip Semiconductor Tech.
++
++	  To compile this driver as a module, choose M here: the
++	  module will be called mos7720.
++
+ config USB_SERIAL_NAVMAN
+ 	tristate "USB Navman GPS device"
+ 	depends on USB_SERIAL
+--- gregkh-2.6.orig/drivers/usb/serial/Makefile
++++ gregkh-2.6/drivers/usb/serial/Makefile
+@@ -34,6 +34,7 @@ obj-$(CONFIG_USB_SERIAL_KEYSPAN_PDA)		+=
+ obj-$(CONFIG_USB_SERIAL_KLSI)			+= kl5kusb105.o
+ obj-$(CONFIG_USB_SERIAL_KOBIL_SCT)		+= kobil_sct.o
+ obj-$(CONFIG_USB_SERIAL_MCT_U232)		+= mct_u232.o
++obj-$(CONFIG_USB_SERIAL_MOS7720)		+= mos7720.o
+ obj-$(CONFIG_USB_SERIAL_NAVMAN)			+= navman.o
+ obj-$(CONFIG_USB_SERIAL_OMNINET)		+= omninet.o
+ obj-$(CONFIG_USB_SERIAL_OPTION)			+= option.o
+--- /dev/null
++++ gregkh-2.6/drivers/usb/serial/mos7720.c
+@@ -0,0 +1,2121 @@
++/*************************************************************************
++ *** Moschip Semiconductor Tech. Ltd.
++ *** --------------------------------------------------------------------
++ ***
++ *** Module Name: Mos7720
++ ***
++ *** File: mos7720.c
++ ***
++ *** File Revision: 1.0
++ *** Author       : VijayaKumar.G.N. (vijaykumar@aspirecom.net)
++ ***		  : AjayKumar (ajay@aspirecom.net)
++ ***
++ *** Leader	  : Gurudeva.N.	(gurudev@aspirecom.net)
++ ***
++    Originally based on drivers/usb/serial/io_edgeport.c which is:
++	Copyright (C) 2000 Inside Out Networks, All rights reserved.
++	Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
++
++ *************************************************************************/
++
++#include <linux/config.h>
++#include <linux/kernel.h>
++#include <linux/errno.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/spinlock.h>
++#include <linux/serial.h>
++#include <linux/serial_reg.h>
++#include <linux/usb.h>
++#include <asm/uaccess.h>
++
++static int debug;
++#include "usb-serial.h"
++
++#define DPRINTK(fmt, args...) printk( "%s: " fmt, __FUNCTION__ , ## args)
++
++/*
++ * Version Information
++ */
++#define DRIVER_VERSION "1.0.0.4F"
++#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
++#define DRIVER_DESC "Moschip USB Serial Driver"
++
++/* default urb timeout */
++#define MOS_WDR_TIMEOUT	(HZ * 5)
++
++#define MOS_PORT1	0x0200
++#define MOS_PORT2	0x0300
++#define MOS_VENREG	0x0000
++#define MOS_MAX_PORT	0x02
++#define MOS_WRITE	0x0E
++#define MOS_READ	0x0D
++
++/* Interrupt Rotinue Defines	*/
++#define SERIAL_IIR_RLS	0x06
++#define SERIAL_IIR_RDA	0x04
++#define SERIAL_IIR_CTI	0x0c
++#define SERIAL_IIR_THR	0x02
++#define SERIAL_IIR_MS	0x00
++
++#define NUM_URBS			16	/* URB Count */
++#define URB_TRANSFER_BUFFER_SIZE	32	/* URB Size */
++
++/* This structure holds all of the local port information */
++struct moschip_port
++{
++	__s16			rxBytesAvail;		/* the number of bytes that we need to read from this device */
++	__s16			rxBytesRemaining;	/* the number of port bytes left to read */
++	char			write_in_progress;	/* TRUE while a write URB is outstanding */
++	__u8			shadowLCR;		/* last LCR value received */
++	__u8			shadowMCR;		/* last MCR value received */
++	__u8			shadowMSR;		/* last MSR value received */
++	__u8			shadowLSR;		/* last LSR value received */
++	__u8			shadowXonChar;		/* last value set as XON char in moschip */
++	__u8			shadowXoffChar;		/* last value set as XOFF char in moschip */
++	__u8			validDataMask;
++	char			open;
++	char			chaseResponsePending;
++	wait_queue_head_t	wait_chase;		/* for handling sleeping while waiting for chase to finish */
++	wait_queue_head_t	wait_open;		/* for handling sleeping while waiting for open to finish */
++	wait_queue_head_t	wait_command;		/* for handling sleeping while waiting for command to finish */
++	wait_queue_head_t	delta_msr_wait;		/* for handling sleeping while waiting for msr change to happen */
++	struct async_icount	icount;
++	struct usb_serial_port	*port;			/* loop back to the owner of this object */
++	struct urb		*write_urb_pool[NUM_URBS];
++};
++
++
++/* This structure holds all of the individual serial device information */
++struct moschip_serial
++{
++	int interrupt_started;
++};
++
++#define USB_VENDOR_ID_MOSCHIP		0x9710
++#define MOSCHIP_DEVICE_ID_7720		0x7720
++#define MOSCHIP_DEVICE_ID_7715		0x7715
++
++static struct usb_device_id moschip_port_id_table [] = {
++	{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
++	{ } /* terminating entry */
++};
++MODULE_DEVICE_TABLE (usb, moschip_port_id_table);
++
++/* function prototypes for the usbserial callbacks */
++static int  mos7720_chars_in_buffer	(struct usb_serial_port *port);
++
++
++/* function prototypes for all of our local functions */
++
++static int  calc_baud_rate_divisor	(int baud_rate, int *divisor);
++static void change_port_settings	(struct moschip_port *mos7720_port, struct termios *old_termios);
++
++static void block_until_chase_response(struct moschip_port *mos7720_port);
++static void block_until_tx_empty(struct moschip_port *mos7720_port);
++
++
++
++/************************************************************************/
++/************************************************************************/
++/*             I N T E R F A C E   F U N C T I O N S			*/
++/*             I N T E R F A C E   F U N C T I O N S			*/
++/************************************************************************/
++/************************************************************************/
++
++static inline void set_serial_private(struct usb_serial *serial, struct moschip_serial *data)
++{
++		usb_set_serial_data(serial, (void *)data );
++}
++
++static inline struct moschip_serial * get_serial_private(struct usb_serial *serial)
++{
++		return (struct moschip_serial*) usb_get_serial_data(serial);
++}
++
++static inline void set_port_private(struct usb_serial_port *port, struct moschip_port *data)
++{
++		usb_set_serial_port_data(port, (void*)data );
++}
++
++static inline struct moschip_port * get_port_private(struct usb_serial_port *port)
++{
++	return (struct moschip_port*) usb_get_serial_port_data(port);
++}
++
++
++/************************************************************************/
++/************************************************************************/
++/*            U S B  C A L L B A C K   F U N C T I O N S                */
++/*            U S B  C A L L B A C K   F U N C T I O N S                */
++/************************************************************************/
++/************************************************************************/
++
++/*****************************************************************************
++ * mos7720_interrupt_callback
++ *	this is the callback function for when we have received data on the
++ *	interrupt endpoint.
++ * Input : 1 Input
++ *			pointer to the URB packet,
++ *
++ *****************************************************************************/
++
++static void mos7720_interrupt_callback (struct urb *urb,struct pt_regs *regs)
++{
++	int result;
++	int length ;
++	__u32 *data ;
++	struct moschip_port   *mos7720_port;
++	unsigned int status;
++	__u8 sp1,sp2,st;
++
++	dbg("%s"," : Entering\n");
++
++	if (!urb) {
++		dbg("%s","Invalid Pointer !!!!:\n");
++		return;
++	}
++
++
++	switch (urb->status)
++	{
++		case 0:
++			/* success */
++			break;
++		case -ECONNRESET:
++		case -ENOENT:
++		case -ESHUTDOWN:
++			/* this urb is terminated, clean up */
++			dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
++			return;
++		default:
++			dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
++			goto exit;
++	}
++
++
++	length = urb->actual_length;
++	data = urb->transfer_buffer;
++
++	mos7720_port= (struct moschip_port*)urb->context;
++
++	if(!mos7720_port)
++        {
++                DPRINTK("%s","NULL mos7720_serial pointer \n");
++                return ;
++        }
++
++	/* Moschip get 4 bytes
++	 * Byte 1 IIR Port 1 (port.number is 0)
++	 * Byte 2 IIR Port 2 (port.number is 1)
++	 * Byte 3 --------------
++	 * Byte 4 FIFO status for both */
++
++	if(length && length>4)
++	{
++		DPRINTK("%s \n","Wrong data !!!");
++		return;
++	}
++
++	status=*data;
++
++		sp1=(status & 0xff000000)>>24;
++		sp2=(status & 0x00ff0000)>>16;
++		st =status & 0x000000ff;
++
++	if((sp1 & 0x01) || (sp2 & 0x01))
++	DPRINTK("No Interrupt !!!");
++	/* No Interrupt Pending in both the ports */
++	else
++	{
++		switch(sp1 & 0x0f)
++		{
++	       case  SERIAL_IIR_RLS: DPRINTK("Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n");
++				break;
++		case SERIAL_IIR_CTI: DPRINTK("Serial Port 1: Receiver time out\n");
++                                break;
++		case SERIAL_IIR_MS:  DPRINTK("Serial Port 1: Modem status change\n");
++                                break;
++		}
++
++		switch(sp2 & 0x0f)
++                {
++               case SERIAL_IIR_RLS: DPRINTK("Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n");
++                               break;
++                case SERIAL_IIR_CTI: DPRINTK("Serial Port 2: Receiver time out\n");
++                               break;
++                case SERIAL_IIR_MS:  DPRINTK("Serial Port 2: Modem status change\n");
++                               break;
++                }
++	}
++
++exit:
++
++	result = usb_submit_urb (urb, GFP_ATOMIC);
++	if (result)
++	{
++		dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
++	}
++
++	return;
++
++}
++
++/*****************************************************************************
++ * mos7720_bulk_in_callback
++ *	this is the callback function for when we have received data on the
++ *	bulk in endpoint.
++ * Input : 1 Input
++ *			pointer to the URB packet,
++ *
++ *****************************************************************************/
++
++static void mos7720_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
++{
++	int			status;
++	unsigned char		*data ;
++	struct usb_serial	*serial;
++	struct usb_serial_port	*port;
++	struct moschip_serial	*mos7720_serial;
++	struct moschip_port	*mos7720_port;
++	struct tty_struct *tty;
++
++	if (urb->status) {
++		DPRINTK("nonzero read bulk status received: %d",urb->status);
++		return;
++	}
++
++	mos7720_port = urb->context;
++	if(!mos7720_port)
++	{
++		DPRINTK("%s","NULL mos7720_port pointer \n");
++		return ;
++	}
++
++	port = mos7720_port->port;
++
++	serial = port->serial;
++
++	DPRINTK("%s\n","Entering... \n");
++
++	data = urb->transfer_buffer;
++	mos7720_serial = get_serial_private(serial);
++
++	DPRINTK("%s","Entering ........... \n");
++
++	tty = port->tty;
++	if (tty && 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);
++	}
++
++	if(!port->read_urb)
++	{
++		DPRINTK("%s","URB KILLED !!!\n");
++		return;
++	}
++
++	if(port->read_urb->status!=-EINPROGRESS)
++	{
++		port->read_urb->dev = serial->dev;
++
++		status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
++
++		if (status)
++		{
++			DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
++		}
++	}
++}
++
++/*****************************************************************************
++ * mos7720_bulk_out_data_callback
++ *	this is the callback function for when we have finished sending serial data
++ *	on the bulk out endpoint.
++ * Input : 1 Input
++ *			pointer to the URB packet,
++ *
++ *****************************************************************************/
++
++static void mos7720_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs)
++{
++	struct moschip_port *mos7720_port ;
++	struct tty_struct *tty;
++
++	if(!urb)
++	{
++		DPRINTK("%s","Invalid Pointer !!!!:\n");
++		return;
++	}
++
++	if (urb->status)
++	{
++		DPRINTK("nonzero write bulk status received:%d\n", urb->status);
++		return;
++	}
++
++	mos7720_port = (struct moschip_port *)urb->context;
++	if(!mos7720_port)
++	{
++		DPRINTK("%s","NULL mos7720_port pointer \n");
++		return ;
++	}
++
++	DPRINTK("%s \n","Entering .........");
++
++	tty = mos7720_port->port->tty;
++
++	if (tty && mos7720_port->open)
++	{
++		/* let the tty driver wakeup if it has a special *
++		 * write_wakeup function 			 */
++
++		if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
++			(tty->ldisc.write_wakeup)(tty);
++		}
++
++		/* tell the tty driver that something has changed */
++		wake_up_interruptible(&tty->write_wait);
++	}
++
++	/* Release the Write URB */
++	mos7720_port->write_in_progress = 0;
++
++//schedule_work(&mos7720_port->port->work);
++
++}
++
++/*****************************************************************************
++ * SendMosCmd
++ *	this function will be used for sending command to device
++ * Input : 5 Input
++ *			pointer to the serial device,
++ *			request type
++ *			value
++ *			register index
++ *			pointer to data/buffer
++ *****************************************************************************/
++
++
++static int SendMosCmd(struct usb_serial *serial, __u8 request, __u16 value, __u16 index, void *data)
++{
++	int status;
++	unsigned int pipe;
++	__u8 requesttype;
++	__u16 size;
++
++	size = 0x00;
++
++	if (value < MOS_MAX_PORT) {
++		if (le16_to_cpu(serial->dev->descriptor.idProduct) == MOSCHIP_DEVICE_ID_7715) {
++			value = value*0x100+0x100;
++		} else {
++			value = value*0x100+0x200;
++		}
++	} else {
++		value = 0x0000;
++		if ((le16_to_cpu(serial->dev->descriptor.idProduct) == MOSCHIP_DEVICE_ID_7715) &&
++		    (index != 0x08)) {
++			DPRINTK("serial->product== MOSCHIP_DEVICE_ID_7715");
++			//index = 0x01 ;
++		}
++	}
++
++	if (request == MOS_WRITE) {
++		request = (__u8)MOS_WRITE;
++		requesttype = (__u8)0x40;
++		value  = value + (__u16)*((unsigned char *)data);
++		data = NULL;
++		pipe = usb_sndctrlpipe(serial->dev, 0);
++	} else {
++		request = (__u8)MOS_READ;
++		requesttype = (__u8)0xC0;
++		size = 0x01;
++		pipe = usb_rcvctrlpipe(serial->dev,0);
++	}
++
++	status = usb_control_msg(serial->dev, pipe, request, requesttype,
++				 value, index, data, size, MOS_WDR_TIMEOUT);
++
++	if (status < 0)
++		dbg("Command Write failed Value %x index %x\n",value,index);
++
++	return status;
++}
++
++
++/************************************************************************/
++/************************************************************************/
++/*       D R I V E R  T T Y  I N T E R F A C E  F U N C T I O N S       */
++/*       D R I V E R  T T Y  I N T E R F A C E  F U N C T I O N S       */
++/************************************************************************/
++/************************************************************************/
++
++
++/*****************************************************************************
++ * Driver tty interface functions
++ *****************************************************************************/
++
++/*****************************************************************************
++ * SerialOpen
++ *	this function is called by the tty driver when a port is opened
++ *	If successful, we return 0
++ *	Otherwise we return a negative error number.
++ *****************************************************************************/
++
++static int mos7720_open (struct usb_serial_port *port, struct file * filp)
++{
++    int response;
++    char data;
++    int j;
++    struct usb_serial *serial;
++    struct usb_serial_port *port0;
++    struct urb *urb;
++
++    struct moschip_serial *mos7720_serial;
++    struct moschip_port *mos7720_port;
++
++	serial = port->serial;
++
++	mos7720_port = get_port_private(port);
++
++	if (mos7720_port == NULL)
++		return -ENODEV;
++
++	port0 = serial->port[0];
++
++	mos7720_serial = get_serial_private(serial);
++
++	if (mos7720_serial == NULL || port0 == NULL)
++	{
++		return -ENODEV;
++	}
++
++
++     usb_clear_halt(serial->dev, port->write_urb->pipe);
++     usb_clear_halt(serial->dev, port->read_urb->pipe);
++
++		 /* Initialising the write urb pool */
++                 for (j = 0; j < NUM_URBS; ++j)
++                 {
++                        urb = usb_alloc_urb(0,SLAB_ATOMIC);
++                        mos7720_port->write_urb_pool[j] = urb;
++
++                        if (urb == NULL)
++                        {
++                                err("No more urbs???");
++                                continue;
++                        }
++
++                        urb->transfer_buffer = NULL;
++                        urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
++                        if (!urb->transfer_buffer)
++                        {
++                                err("%s-out of memory for urb buffers.", __FUNCTION__);
++                                continue;
++                        }
++                }
++
++
++/*****************************************************************************
++ * Initialize MCS7720 -- Write Init values to corresponding Registers
++ *
++ * Register Index
++ * 1 : IER
++ * 2 : FCR
++ * 3 : LCR
++ * 4 : MCR
++ *
++ * 0x08 : SP1/2 Control Reg
++ *****************************************************************************/
++
++	SendMosCmd(port->serial,MOS_READ,mos7720_port->port->number - mos7720_port->port->serial->minor, UART_LSR, &data);
++	DPRINTK("\nSS::%x               LSR:%x\n",(unsigned int)mos7720_port,data);
++
++	DPRINTK("%s", "Check:Sending Command .......... \n");
++
++	data = 0x02;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x01, &data);
++	data = 0x02;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x02, &data);
++
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x02, &data);
++
++	data = 0xCF;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x02, &data);
++	data = 0x03;
++        mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++	data = 0x0b;
++        mos7720_port->shadowMCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++	data = 0x0b;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_READ,MOS_MAX_PORT,0x08, &data);
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x08, &data);
++
++/*	data = 0x00;
++	SendMosCmd(port->serial,MOS_READ,MOS_MAX_PORT,port->number - port->serial->minor + 1, &data);
++	data = 0x03;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,port->number - port->serial->minor + 1, &data);
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,port->number - port->serial->minor + 1, &data);
++*/
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_READ,MOS_MAX_PORT,0x08, &data);
++
++	data = data | (port->number - port->serial->minor + 1);
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x08, &data);
++
++	data = 0x83;
++        mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++	data = 0x0c;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x00, &data);
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++	data = 0x03;
++        mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++	data = 0x0c;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++	data = 0x0c;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++
++//Matrix
++
++	/* 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;
++    	/* see if we've set up our endpoint info yet   *
++	 * (can't set it up in mos7720_startup as the  *
++	 * structures were not set up at that time.)   */
++
++
++	if (!mos7720_serial->interrupt_started) {
++		DPRINTK("%s \n","Interrupt buffer NULL !!!");
++
++		/* not set up yet, so do it now */
++		mos7720_serial->interrupt_started = 1;
++
++		DPRINTK("%s \n","To Submit URB !!!");
++
++		/* set up our interrupt urb */
++		usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
++				 usb_rcvintpipe(serial->dev,
++				 		port->interrupt_in_endpointAddress),
++				 port0->interrupt_in_buffer,
++				 port0->interrupt_in_urb->transfer_buffer_length,
++				 mos7720_interrupt_callback, mos7720_port,
++				 port0->interrupt_in_urb->interval);
++
++		/* start interrupt read for this mos7720 this interrupt *
++	         * will continue as long as the mos7720 is connected    */
++		DPRINTK("%s \n","Submit URB over !!!");
++		response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
++		if (response)
++			err("%s - Error %d submitting control urb", __FUNCTION__, response);
++	}
++
++	/* set up our bulk in urb */
++	usb_fill_bulk_urb(port->read_urb, serial->dev,
++			  usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
++			  port->bulk_in_buffer,
++			  port->read_urb->transfer_buffer_length,
++			  mos7720_bulk_in_callback, mos7720_port);
++	response = usb_submit_urb(port->read_urb, GFP_KERNEL);
++	if (response)
++		err("%s - Error %d submitting read urb", __FUNCTION__, response);
++
++	/* initialize our wait queues */
++	init_waitqueue_head(&mos7720_port->wait_open);
++	init_waitqueue_head(&mos7720_port->wait_chase);
++	init_waitqueue_head(&mos7720_port->delta_msr_wait);
++	init_waitqueue_head(&mos7720_port->wait_command);
++
++	/* initialize our icount structure */
++	memset (&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
++
++	/* initialize our port settings */
++	mos7720_port->shadowMCR  = UART_MCR_OUT2;	/* Must set to enable ints! */
++	mos7720_port->chaseResponsePending = 0;
++	/* send a open port command */
++	mos7720_port->open = 1;
++	mos7720_port->rxBytesAvail = 0x0;
++
++
++	DPRINTK("\n\nusb_serial serial:%x	mos7720_port:%x\nmos7720_serial:%x	usb_serial_port port:%x\n\n",(unsigned int)serial,(unsigned int)mos7720_port,(unsigned int)mos7720_serial,(unsigned int)port);
++
++
++	return 0;
++}
++
++/*****************************************************************************
++ * mos7720_close
++ *	this function is called by the tty driver when a port is closed
++ *****************************************************************************/
++
++static void mos7720_close (struct usb_serial_port *port, struct file * filp)
++{
++	struct usb_serial *serial;
++	struct moschip_serial *mos7720_serial;
++	struct moschip_port *mos7720_port;
++	char data;
++	int j;
++
++	DPRINTK("%s\n","mos7720_close:entering...");
++
++	serial = port->serial;
++
++	mos7720_serial = get_serial_private(serial);
++	mos7720_port = get_port_private(port);
++
++	if ((mos7720_serial == NULL) || (mos7720_port == NULL))
++	{
++		return;
++	}
++
++
++	for (j = 0; j < NUM_URBS; ++j)
++		usb_unlink_urb (mos7720_port->write_urb_pool[j]);
++
++
++	   /* Freeing Write URBs*/
++	   for (j = 0; j < NUM_URBS; ++j)
++ 	   {
++                if (mos7720_port->write_urb_pool[j])
++                {
++                    if (mos7720_port->write_urb_pool[j]->transfer_buffer)
++                            kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
++
++                    usb_free_urb (mos7720_port->write_urb_pool[j]);
++                }
++          }
++
++
++	if (serial->dev)
++	{
++		/* flush and block until tx is empty*/
++		block_until_tx_empty(mos7720_port);
++	}
++
++	/* While closing port, shutdown all bulk read, write  *
++	 * and interrupt read if they exists                  */
++	if (serial->dev) {
++		if (port->write_urb) {
++			DPRINTK("%s","Shutdown bulk write\n");
++			usb_unlink_urb(port->write_urb);
++		}
++		if (port->read_urb) {
++			DPRINTK("%s","Shutdown bulk read\n");
++			usb_unlink_urb(port->read_urb);
++		}
++	}
++
++
++
++
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++
++	data = 0x00;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++
++	mos7720_port->open = 0;
++
++	DPRINTK("%s \n","Leaving ............");
++}
++
++
++/*****************************************************************************
++ * SerialBreak
++ *	this function sends a break to the port
++ *****************************************************************************/
++static void mos7720_break (struct usb_serial_port *port, int break_state)
++{
++        unsigned char data;
++	struct usb_serial *serial;
++	struct moschip_serial *mos7720_serial;
++	struct moschip_port *mos7720_port;
++
++	DPRINTK("%s \n","Entering ...........");
++
++	serial = port->serial;
++
++	mos7720_serial = get_serial_private(serial);
++	mos7720_port = get_port_private(port);
++
++	if ((mos7720_serial == NULL) || (mos7720_port == NULL)) {
++		return;
++	}
++
++	/* flush and chase */
++	mos7720_port->chaseResponsePending = 1;
++
++	if (serial->dev) {
++		/* flush and block until tx is empty*/
++		block_until_chase_response(mos7720_port);
++	}
++
++	if (break_state == -1) {
++		data = mos7720_port->shadowLCR | UART_LCR_SBC;
++	} else {
++		data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
++	}
++
++	mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++
++	return;
++}
++
++
++/************************************************************************
++ *
++ * block_until_chase_response
++ *
++ *	This function will block the close until one of the following:
++ *		1. Response to our Chase comes from mos7720
++ *		2. A timout of 10 seconds without activity has expired
++ *		   (1K of mos7720 data @ 2400 baud ==> 4 sec to empty)
++ *
++ ************************************************************************/
++
++static void block_until_chase_response(struct moschip_port *mos7720_port)
++{
++	int timeout = 1*HZ;
++	int wait = 10;
++	int count ;
++
++
++	while (1)
++	{
++		count = mos7720_chars_in_buffer(mos7720_port->port);
++
++		/* Check for Buffer status */
++		if (count <= 0) {
++			mos7720_port->chaseResponsePending = 0;
++			return;
++		}
++
++		/* Block the thread for a while */
++		interruptible_sleep_on_timeout (&mos7720_port->wait_chase, timeout);
++                /* No activity.. count down section */
++		wait--;
++		if (wait == 0)
++		{
++			dbg("%s - TIMEOUT", __FUNCTION__);
++			return;
++		}
++		else
++		{
++	                /* Reset timout value back to seconds */
++			wait = 10;
++		}
++	}
++
++}
++
++
++/************************************************************************
++ *
++ * block_until_tx_empty
++ *
++ *	This function will block the close until one of the following:
++ *		1. TX count are 0
++ *		2. The mos7720 has stopped
++ *		3. A timout of 3 seconds without activity has expired
++ *
++ ************************************************************************/
++static void block_until_tx_empty (struct moschip_port *mos7720_port)
++{
++	int timeout = HZ/10;
++	int wait = 30;
++	int count;
++
++	while (1)
++	{
++
++		count = mos7720_chars_in_buffer(mos7720_port->port);
++
++                /* Check for Buffer status */
++		if(count<=0)
++		{
++			return;
++		}
++
++                /* Block the thread for a while */
++		interruptible_sleep_on_timeout (&mos7720_port->wait_chase, timeout);
++
++                /* No activity.. count down section */
++		wait--;
++		if (wait == 0)
++		{
++			dbg("%s - TIMEOUT", __FUNCTION__);
++			return;
++		}
++		else
++		{
++	                /* Reset timout value back to seconds */
++			wait = 30;
++		}
++	}
++}
++
++/*****************************************************************************
++ * mos7720_write_room
++ *	this function is called by the tty driver when it wants to know how many
++ *	bytes of data we can accept for a specific port.
++ *	If successful, we return the amount of room that we have for this port
++ *	Otherwise we return a negative error number.
++ *****************************************************************************/
++
++static int mos7720_write_room (struct usb_serial_port *port)
++{
++    int i;
++    int room = 0;
++    struct moschip_port *mos7720_port;
++
++
++	DPRINTK("%s \n"," mos7720_write_room:entering ...........");
++
++        mos7720_port = get_port_private(port);
++        if (mos7720_port == NULL)
++        {
++                DPRINTK("%s \n","mos7720_break:leaving ...........");
++                return -1;
++        }
++
++        for (i = 0; i < NUM_URBS; ++i)
++	{
++                if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
++		{
++                        room += URB_TRANSFER_BUFFER_SIZE;
++                }
++        }
++
++        dbg("%s - returns %d", __FUNCTION__, room);
++        return (room);
++
++}
++
++
++/*****************************************************************************
++ * mos7720_chars_in_buffer
++ *	this function is called by the tty driver when it wants to know how many
++ *	bytes of data we currently have outstanding in the port (data that has
++ *	been written, but hasn't made it out the port yet)
++ *	If successful, we return the number of bytes left to be written in the
++ *	system,
++ *	Otherwise we return a negative error number.
++ *****************************************************************************/
++
++static int mos7720_chars_in_buffer (struct usb_serial_port *port)
++{
++	int i;
++    	int chars = 0;
++ 	struct moschip_port *mos7720_port;
++
++	DPRINTK("%s \n"," mos7720_chars_in_buffer:entering ...........");
++
++        mos7720_port = get_port_private(port);
++        if (mos7720_port == NULL)
++        {
++                DPRINTK("%s \n","mos7720_break:leaving ...........");
++                return -1;
++        }
++
++    	for (i = 0; i < NUM_URBS; ++i)
++    	{
++        	if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
++	    	{
++                	chars += URB_TRANSFER_BUFFER_SIZE;
++            	}
++    	}
++    	dbg("%s - returns %d", __FUNCTION__, chars);
++    	return (chars);
++
++}
++
++
++/*****************************************************************************
++ * SerialWrite
++ *	this function is called by the tty driver when data should be written to
++ *	the port.
++ *	If successful, we return the number of bytes written, otherwise we
++ *      return a negative error number.
++ *****************************************************************************/
++
++static int mos7720_write(struct usb_serial_port *port, const unsigned char *data, int count)
++{
++	int status;
++	int i;
++	int bytes_sent = 0;
++	int transfer_size;
++
++	struct moschip_port *mos7720_port;
++	struct usb_serial *serial;
++	struct moschip_serial *mos7720_serial;
++	struct urb    *urb;
++
++	const unsigned char *current_position = data;
++
++	DPRINTK("%s \n","entering ...........");
++
++	serial = port->serial;
++
++	mos7720_port = get_port_private(port);
++	if(mos7720_port==NULL)
++	{
++		DPRINTK("%s","mos7720_port is NULL\n");
++		return -1;
++	}
++
++	mos7720_serial =get_serial_private(serial);
++	if(mos7720_serial==NULL)
++	{
++		DPRINTK("%s","mos7720_serial is NULL \n");
++		return -1;
++	}
++
++
++        	/* try to find a free urb in the list */
++        	urb = NULL;
++
++        	for (i = 0; i < NUM_URBS; ++i)
++		{
++                	if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
++			{
++                        	urb = mos7720_port->write_urb_pool[i];
++				DPRINTK("\nURB:%d",i);
++                        	break;
++                	}
++        	}
++
++	        if (urb == NULL)
++		{
++                	dbg("%s - no more free urbs", __FUNCTION__);
++                	goto exit;
++        	}
++
++        	if (urb->transfer_buffer == NULL)
++		{
++          	urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
++
++                	if (urb->transfer_buffer == NULL)
++			{
++                        	err("%s no more kernel memory...", __FUNCTION__);
++                        	goto exit;
++                	}
++        	}
++        	transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
++
++               	memcpy (urb->transfer_buffer, current_position, transfer_size);
++		usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, urb->transfer_buffer);
++
++		/* fill urb with data and submit  */
++
++           	usb_fill_bulk_urb (urb,
++		 serial->dev,
++		 usb_sndbulkpipe(serial->dev,
++		 port->bulk_out_endpointAddress),
++		 urb->transfer_buffer,
++		 transfer_size,
++		 mos7720_bulk_out_data_callback,
++		 mos7720_port);
++
++
++        	/* send it down the pipe */
++        	status = usb_submit_urb(urb,GFP_ATOMIC);
++
++        	if (status)
++		{
++                	err("%s - usb_submit_urb(write bulk) failed with status = %d", __FUNCTION__, status);
++                	bytes_sent = status;
++			goto exit;
++        	}
++        	bytes_sent = transfer_size;
++
++exit:
++	return bytes_sent;
++
++}
++
++/*****************************************************************************
++ * SerialThrottle
++ *	this function is called by the tty driver when it wants to stop the data
++ *	being read from the port.
++ *****************************************************************************/
++
++static void mos7720_throttle (struct usb_serial_port *port)
++{
++	struct moschip_port *mos7720_port;
++	struct tty_struct *tty;
++	int status;
++
++	DPRINTK("- port %d\n", port->number);
++
++	mos7720_port = get_port_private(port);
++
++	if (mos7720_port == NULL)
++		return;
++
++	if (!mos7720_port->open)
++	{
++		DPRINTK("%s\n","port not opened");
++		return;
++	}
++
++	DPRINTK("%s","Entering .......... \n");
++
++	tty = port->tty;
++	if (!tty)
++	{
++		dbg ("%s - no tty available", __FUNCTION__);
++		return;
++	}
++
++	/* if we are implementing XON/XOFF, send the stop character */
++	if (I_IXOFF(tty))
++	{
++		unsigned char stop_char = STOP_CHAR(tty);
++		status = mos7720_write(port, &stop_char, 1);
++		if (status <= 0)
++		{
++			return;
++		}
++	}
++
++	/* if we are implementing RTS/CTS, toggle that line */
++	if (tty->termios->c_cflag & CRTSCTS)
++	{
++		mos7720_port->shadowMCR &= ~UART_MCR_RTS;
++		status = SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor, UART_MCR, &mos7720_port->shadowMCR);
++		if (status != 0)
++		{
++			return;
++		}
++	}
++
++	return;
++}
++
++
++/*****************************************************************************
++ * mos7720_unthrottle
++ *	this function is called by the tty driver when it wants to resume the data
++ *	being read from the port (called after SerialThrottle is called)
++ *****************************************************************************/
++static void mos7720_unthrottle (struct usb_serial_port *port)
++{
++	struct tty_struct *tty;
++	int status;
++	struct moschip_port *mos7720_port = get_port_private(port);
++
++	if (mos7720_port == NULL)
++		return;
++
++	if (!mos7720_port->open) {
++		dbg("%s - port not opened", __FUNCTION__);
++		return;
++	}
++
++	DPRINTK("%s","Entering .......... \n");
++
++	tty = port->tty;
++	if (!tty)
++	{
++		dbg ("%s - no tty available", __FUNCTION__);
++		return;
++	}
++
++	/* if we are implementing XON/XOFF, send the start character */
++	if (I_IXOFF(tty))
++	{
++		unsigned char start_char = START_CHAR(tty);
++		status = mos7720_write(port, &start_char, 1);
++		if (status <= 0)
++		{
++			return;
++		}
++	}
++
++	/* if we are implementing RTS/CTS, toggle that line */
++	if (tty->termios->c_cflag & CRTSCTS)
++	{
++		mos7720_port->shadowMCR |= UART_MCR_RTS;
++		status = SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor, UART_MCR, &mos7720_port->shadowMCR);
++		if (status != 0)
++		{
++			return;
++		}
++	}
++
++	return;
++}
++
++
++/*****************************************************************************
++ * SerialSetTermios
++ *	this function is called by the tty driver when it wants to change the termios structure
++ *****************************************************************************/
++
++static void mos7720_set_termios (struct usb_serial_port *port, struct termios *old_termios)
++{
++	int status;
++	unsigned int cflag;
++	struct usb_serial *serial;
++	struct moschip_port *mos7720_port;
++	struct tty_struct *tty;
++
++	serial = port->serial;
++
++	mos7720_port = get_port_private(port);
++
++	if (mos7720_port == NULL)
++		return;
++
++	tty = port->tty;
++
++	if (!port->tty || !port->tty->termios)
++	{
++		dbg ("%s - no tty or termios", __FUNCTION__);
++		return;
++	}
++
++	if (!mos7720_port->open)
++	{
++		dbg("%s - port not opened", __FUNCTION__);
++		return;
++	}
++
++	DPRINTK("%s\n","setting termios - ASPIRE");
++
++	cflag = tty->termios->c_cflag;
++
++	if (!cflag)
++	{
++           printk("%s %s\n",__FUNCTION__,"cflag is NULL");
++	   return;
++	}
++
++	/* check that they really want us to change something */
++	if (old_termios)
++	{
++		if ((cflag == old_termios->c_cflag) &&
++		    (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag)))
++		{
++			DPRINTK("%s\n","Nothing to change");
++			return;
++		}
++	}
++
++	dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
++	    tty->termios->c_cflag,
++	    RELEVANT_IFLAG(tty->termios->c_iflag));
++
++	if (old_termios)
++	{
++		dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
++		    old_termios->c_cflag,
++		    RELEVANT_IFLAG(old_termios->c_iflag));
++	}
++
++	dbg("%s - port %d", __FUNCTION__, port->number);
++
++	/* change the port settings to the new ones specified */
++
++	change_port_settings (mos7720_port, old_termios);
++
++	if(!port->read_urb)
++	{
++		DPRINTK("%s","URB KILLED !!!!!\n");
++		return;
++	}
++
++	if(port->read_urb->status!=-EINPROGRESS)
++	{
++		port->read_urb->dev = serial->dev;
++	 	status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
++		if (status)
++		{
++			DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
++		}
++	}
++	return;
++}
++
++
++/*****************************************************************************
++ * get_lsr_info - get line status register info
++ *
++ * Purpose: Let user call ioctl() to get info when the UART physically
++ * 	    is emptied.  On bus types like RS485, the transmitter must
++ * 	    release the bus after transmitting. This must be done when
++ * 	    the transmit shift register is empty, not be done when the
++ * 	    transmit holding register is empty.  This functionality
++ * 	    allows an RS485 driver to be written in user space.
++ *****************************************************************************/
++
++static int get_lsr_info(struct moschip_port *mos7720_port, unsigned int __user *value)
++{
++	int count;
++	unsigned int result = 0;
++
++        count = mos7720_chars_in_buffer(mos7720_port->port);
++        if(count == 0)
++	{
++		dbg("%s -- Empty", __FUNCTION__);
++		result = TIOCSER_TEMT;
++	}
++
++	if (copy_to_user(value, &result, sizeof(int)))
++		return -EFAULT;
++	return 0;
++}
++
++/*****************************************************************************
++ * get_number_bytes_avail - get number of bytes available
++ *
++ * Purpose: Let user call ioctl to get the count of number of bytes available.
++ *****************************************************************************/
++
++static int get_number_bytes_avail(struct moschip_port *mos7720_port, unsigned int __user *value)
++{
++	unsigned int result = 0;
++	struct tty_struct *tty = mos7720_port->port->tty;
++
++	if (!tty)
++		return -ENOIOCTLCMD;
++
++	result = tty->read_cnt;
++
++	dbg("%s(%d) = %d", __FUNCTION__,  mos7720_port->port->number, result);
++	if (copy_to_user(value, &result, sizeof(int)))
++		return -EFAULT;
++
++	return -ENOIOCTLCMD;
++}
++/*****************************************************************************
++ * set_higher_rates
++ *      function to set for Higher rates
++ *****************************************************************************/
++
++static int set_higher_rates(struct moschip_port *mos7720_port, unsigned int baud)
++{
++	unsigned char data;
++
++	struct usb_serial_port *port;
++	struct usb_serial *serial;
++
++
++	if (mos7720_port == NULL)
++		return -1;
++
++	port = (struct usb_serial_port*)mos7720_port->port;
++
++	serial = (struct usb_serial*)port->serial;
++
++        /***********************************************
++         *      Init Sequence for higher rates
++         ***********************************************/
++
++	DPRINTK("%s", "Sending Setting Commands .......... \n");
++
++	data = 0x000;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++	data = 0x000;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x02, &data);
++	data = 0x0CF;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x02, &data);
++	data = 0x00b;
++        mos7720_port->shadowMCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++	data = 0x00b;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++
++	data = 0x000;
++	SendMosCmd(port->serial,MOS_READ,MOS_MAX_PORT,0x08, &data);
++	data = 0x000;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x08, &data);
++
++
++        /***********************************************
++         *              Set for higher rates           *
++         ***********************************************/
++
++	data = baud * 0x10;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,port->number - port->serial->minor + 1,&data);
++
++	data = 0x003;
++	SendMosCmd(port->serial,MOS_READ,MOS_MAX_PORT,0x08, &data);
++	data = 0x003;
++	SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x08, &data);
++
++	data = 0x02b;
++        mos7720_port->shadowMCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++	data = 0x02b;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++
++        /***********************************************
++         *              Set DLL/DLM
++         ***********************************************/
++
++	data = mos7720_port->shadowLCR | UART_LCR_DLAB;
++        mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++
++	data =  0x001; /* DLL */
++        SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x00, &data);
++	data =  0x000; /* DLM */
++        SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++
++	data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
++        mos7720_port->shadowLCR  = data;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++
++
++	return 0;
++}
++
++/*****************************************************************************
++ * set_modem_info
++ *      function to set modem info
++ *****************************************************************************/
++
++static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, unsigned int __user *value)
++{
++	unsigned int mcr ;
++	unsigned int arg;
++	unsigned char data;
++
++	struct usb_serial_port *port;
++
++	if (mos7720_port == NULL)
++		return -1;
++
++
++	port = (struct usb_serial_port*)mos7720_port->port;
++
++	mcr = mos7720_port->shadowMCR;
++
++	if (copy_from_user(&arg, value, sizeof(int)))
++		return -EFAULT;
++
++	switch (cmd) {
++		case TIOCMBIS:
++			if (arg & TIOCM_RTS)
++				mcr |= UART_MCR_RTS;
++			if (arg & TIOCM_DTR)
++				mcr |= UART_MCR_RTS;
++			if (arg & TIOCM_LOOP)
++				mcr |= UART_MCR_LOOP;
++			break;
++
++		case TIOCMBIC:
++			if (arg & TIOCM_RTS)
++				mcr &= ~UART_MCR_RTS;
++			if (arg & TIOCM_DTR)
++				mcr &= ~UART_MCR_RTS;
++			if (arg & TIOCM_LOOP)
++				mcr &= ~UART_MCR_LOOP;
++			break;
++
++		case TIOCMSET:
++			/* turn off the RTS and DTR and LOOPBACK
++			 * and then only turn on what was asked to */
++			mcr &=  ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
++			mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
++			mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
++			mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
++			break;
++	}
++
++	mos7720_port->shadowMCR = mcr;
++
++	data = mos7720_port->shadowMCR;
++	SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor, UART_MCR, &data);
++
++	return 0;
++}
++
++/*****************************************************************************
++ * get_modem_info
++ *      function to get modem info
++ *****************************************************************************/
++
++static int get_modem_info(struct moschip_port *mos7720_port, unsigned int __user *value)
++{
++	unsigned int result = 0;
++	unsigned int msr = mos7720_port->shadowMSR;
++	unsigned int mcr = mos7720_port->shadowMCR;
++
++	result = ((mcr & UART_MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
++		  | ((mcr & UART_MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
++		  | ((msr & UART_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
++		  | ((msr & UART_MSR_DCD)	? TIOCM_CAR: 0)   /* 0x040 */
++		  | ((msr & UART_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
++		  | ((msr & UART_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */
++
++
++	dbg("%s -- %x", __FUNCTION__, result);
++
++	if (copy_to_user(value, &result, sizeof(int)))
++		return -EFAULT;
++	return 0;
++}
++
++/*****************************************************************************
++ * get_serial_info
++ *      function to get information about serial port
++ *****************************************************************************/
++
++static int get_serial_info(struct moschip_port *mos7720_port, struct serial_struct __user *retinfo)
++{
++	struct serial_struct tmp;
++
++	if (mos7720_port == NULL)
++		return -1;
++
++
++	if (!retinfo)
++		return -EFAULT;
++
++	memset(&tmp, 0, sizeof(tmp));
++
++	tmp.type		= PORT_16550A;
++	tmp.line		= mos7720_port->port->serial->minor;
++	tmp.port		= mos7720_port->port->number;
++	tmp.irq			= 0;
++	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
++        tmp.xmit_fifo_size      = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
++	tmp.baud_base		= 9600;
++	tmp.close_delay		= 5*HZ;
++	tmp.closing_wait	= 30*HZ;
++
++
++	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
++		return -EFAULT;
++	return 0;
++}
++
++/*****************************************************************************
++ * SerialIoctl
++ *	this function handles any ioctl calls to the driver
++ *****************************************************************************/
++
++static int mos7720_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
++{
++	struct moschip_port *mos7720_port;
++
++	struct async_icount cnow;
++	struct async_icount cprev;
++	struct serial_icounter_struct icount;
++
++	mos7720_port = get_port_private(port);
++	if (mos7720_port == NULL)
++		return -1;
++
++	dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
++
++	switch (cmd)
++	{
++                /* return number of bytes available */
++
++		case TIOCINQ:
++			dbg("%s (%d) TIOCINQ", __FUNCTION__,  port->number);
++			return get_number_bytes_avail(mos7720_port, (unsigned int __user *)arg);
++			break;
++
++		case TIOCSERGETLSR:
++			dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
++			return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
++			return 0;
++
++		case TIOCMBIS:
++		case TIOCMBIC:
++		case TIOCMSET:
++			dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,  port->number);
++			return set_modem_info(mos7720_port, cmd, (unsigned int __user *)arg);
++
++		case TIOCMGET:
++			dbg("%s (%d) TIOCMGET", __FUNCTION__,  port->number);
++			return get_modem_info(mos7720_port, (unsigned int __user *) arg);
++
++		case TIOCGSERIAL:
++			dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
++			return get_serial_info(mos7720_port, (struct serial_struct __user *) arg);
++
++		case TIOCSSERIAL:
++			dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
++			break;
++
++		case TIOCMIWAIT:
++			dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
++			cprev = mos7720_port->icount;
++			while (1) {
++				interruptible_sleep_on(&mos7720_port->delta_msr_wait);
++				/* see if a signal did it */
++				if (signal_pending(current))
++					return -ERESTARTSYS;
++				cnow = mos7720_port->icount;
++				if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
++				    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
++					return -EIO; /* no change => error */
++				if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
++				    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
++				    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
++				    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
++					return 0;
++				}
++				cprev = cnow;
++			}
++			/* NOTREACHED */
++			break;
++
++		case TIOCGICOUNT:
++			cnow = mos7720_port->icount;
++			icount.cts = cnow.cts;
++			icount.dsr = cnow.dsr;
++			icount.rng = cnow.rng;
++			icount.dcd = cnow.dcd;
++			icount.rx = cnow.rx;
++			icount.tx = cnow.tx;
++			icount.frame = cnow.frame;
++			icount.overrun = cnow.overrun;
++			icount.parity = cnow.parity;
++			icount.brk = cnow.brk;
++			icount.buf_overrun = cnow.buf_overrun;
++
++			dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,  port->number, icount.rx, icount.tx );
++			if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
++				return -EFAULT;
++			return 0;
++	}
++
++	return -ENOIOCTLCMD;
++}
++
++
++/*****************************************************************************
++ * send_cmd_write_baud_rate
++ *	this function sends the proper command to change the baud rate of the
++ *	specified port.
++ *****************************************************************************/
++
++static int send_cmd_write_baud_rate (struct moschip_port *mos7720_port, int baudrate)
++{
++	int divisor;
++	int status;
++	unsigned char data;
++	unsigned char number ;
++
++	struct usb_serial_port *port;
++
++	if (mos7720_port == NULL)
++		return -1;
++
++	port = mos7720_port->port;
++
++	DPRINTK("%s","Entering .......... \n");
++
++	number = mos7720_port->port->number - mos7720_port->port->serial->minor;
++	dbg("%s - port = %d, baud = %d", __FUNCTION__, mos7720_port->port->number, baudrate);
++
++        /* Calculate the Divisor */
++	status = calc_baud_rate_divisor (baudrate, &divisor);
++	if (status)
++	{
++		err("%s - bad baud rate", __FUNCTION__);
++		DPRINTK("%s\n","bad baud rate");
++		return status;
++	}
++
++        /* Enable access to divisor latch */
++        data = mos7720_port->shadowLCR | UART_LCR_DLAB;
++        mos7720_port->shadowLCR  = data;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_LCR, &data);
++
++	/* Write the divisor */
++	data = ((unsigned char)(divisor & 0xff));
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor,0x00, &data);
++
++	data = ((unsigned char)((divisor & 0xff00) >> 8));
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor,0x01, &data);
++
++        /* Disable access to divisor latch */
++        data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
++        mos7720_port->shadowLCR = data;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor,0x03, &data);
++
++	return status;
++}
++
++/* baud rate information */
++struct divisor_table_entry
++{
++	__u32  baudrate;
++	__u16  divisor;
++};
++
++/* Define table of divisors for moschip 7720 hardware	   *
++ * These assume a 3.6864MHz crystal, the standard /16, and *
++ * MCR.7 = 0.						   */
++static struct divisor_table_entry divisor_table[] = {
++	{   50,		2304},
++	{   110,	1047},	/* 2094.545455 => 230450   => .0217 % over */
++	{   134,	857},	/* 1713.011152 => 230398.5 => .00065% under */
++	{   150,	768},
++	{   300,	384},
++	{   600,	192},
++	{   1200,	96},
++	{   1800,	64},
++	{   2400,	48},
++	{   4800,	24},
++	{   7200,	16},
++	{   9600,	12},
++	{   19200,	6},
++	{   38400,	3},
++	{   57600,	2},
++	{   115200,	1},
++};
++
++/*****************************************************************************
++ * calc_baud_rate_divisor
++ *	this function calculates the proper baud rate divisor for the specified
++ *	baud rate.
++ *****************************************************************************/
++static int calc_baud_rate_divisor(int baudrate, int *divisor)
++{
++	int i;
++	__u16 custom;
++	__u16 round1;
++	__u16 round;
++
++
++	dbg("%s - %d", __FUNCTION__, baudrate);
++
++	for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
++		if (divisor_table[i].baudrate == baudrate) {
++			*divisor = divisor_table[i].divisor;
++			return 0;
++		}
++	}
++
++        /* After trying for all the standard baud rates    *
++         * Try calculating the divisor for this baud rate  */
++	if (baudrate > 75 &&  baudrate < 230400) {
++		/* get the divisor */
++		custom = (__u16)(230400L  / baudrate);
++
++		/* Check for round off */
++		round1 = (__u16)(2304000L / baudrate);
++		round = (__u16)(round1 - (custom * 10));
++		if (round > 4)
++			custom++;
++		*divisor = custom;
++
++		DPRINTK(" Baud %d = %d\n",baudrate, custom);
++		return 0;
++	}
++
++	DPRINTK("%s\n"," Baud calculation Failed...");
++	return -EINVAL;
++}
++
++
++
++/*****************************************************************************
++ * change_port_settings
++ *	This routine is called to set the UART on the device to match
++ *      the specified new settings.
++ *****************************************************************************/
++
++static void change_port_settings (struct moschip_port *mos7720_port, struct termios *old_termios)
++{
++	struct tty_struct *tty;
++	int baud;
++	unsigned cflag;
++	unsigned iflag;
++	__u8 mask = 0xff;
++	__u8 lData;
++	__u8 lParity;
++	__u8 lStop;
++	int status;
++	char data;
++
++	struct usb_serial_port *port;
++	struct usb_serial *serial;
++
++	if (mos7720_port == NULL)
++		return ;
++
++	port = (struct usb_serial_port *)mos7720_port->port;
++
++	serial = port->serial;
++
++	dbg("%s - port %d", __FUNCTION__, mos7720_port->port->number);
++
++	if (!mos7720_port->open) {
++		dbg("%s - port not opened", __FUNCTION__);
++		return;
++	}
++
++	tty = mos7720_port->port->tty;
++
++	if ((!tty) || (!tty->termios))
++	{
++		dbg("%s - no tty structures", __FUNCTION__);
++		return;
++	}
++
++	DPRINTK("%s","Entering .......... \n");
++
++	lData = UART_LCR_WLEN8;
++	lStop = 0x00;	/* 1 stop bit */
++	lParity = 0x00;	/* No parity */
++
++	cflag = tty->termios->c_cflag;
++	iflag = tty->termios->c_iflag;
++
++	/* Change the number of bits */
++	switch (cflag & CSIZE)
++	{
++		case CS5:	lData = UART_LCR_WLEN5;
++				mask = 0x1f;
++			    	break;
++
++		case CS6:   	lData = UART_LCR_WLEN6;
++				mask = 0x3f;
++			    	break;
++
++		case CS7:   	lData = UART_LCR_WLEN7;
++				mask = 0x7f;
++			    	break;
++		default:
++		case CS8:   	lData = UART_LCR_WLEN8;
++			    	break;
++	}
++
++	/* Change the Parity bit */
++	if (cflag & PARENB) {
++		if (cflag & PARODD) {
++			lParity = UART_LCR_PARITY;
++			dbg("%s - parity = odd", __FUNCTION__);
++		} else {
++			lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
++			dbg("%s - parity = even", __FUNCTION__);
++		}
++
++	} else {
++		dbg("%s - parity = none", __FUNCTION__);
++	}
++
++	if (cflag & CMSPAR)
++		lParity = lParity | 0x20;
++
++	/* Change the Stop bit */
++	if (cflag & CSTOPB) {
++		lStop = UART_LCR_STOP;
++		dbg("%s - stop bits = 2", __FUNCTION__);
++	} else {
++		lStop = 0x00;
++		dbg("%s - stop bits = 1", __FUNCTION__);
++	}
++
++#define LCR_BITS_MASK		0x03	/* Mask for bits/char field */
++#define LCR_STOP_MASK		0x04	/* Mask for stop bits field */
++#define LCR_PAR_MASK		0x38	/* Mask for parity field */
++
++	/* Update the LCR with the correct value */
++	mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
++	mos7720_port->shadowLCR |= (lData | lParity | lStop);
++
++	mos7720_port->validDataMask = mask;
++
++	/* Disable Interrupts */
++	data = 0x00;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
++
++	data = 0x00;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_FCR, &data);
++
++	data = 0xcf;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_FCR, &data);
++
++	/* Send the updated LCR value to the mos7720 */
++	data = mos7720_port->shadowLCR;
++        SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_LCR, &data);
++
++        data = 0x00b;
++        mos7720_port->shadowMCR = data;
++        SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++        data = 0x00b;
++        SendMosCmd(port->serial,MOS_WRITE,port->number - port->serial->minor,0x04, &data);
++
++	/* set up the MCR register and send it to the mos7720 */
++
++	mos7720_port->shadowMCR = UART_MCR_OUT2;
++	if (cflag & CBAUD)
++		mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
++
++
++	if (cflag & CRTSCTS) {
++		mos7720_port->shadowMCR |= (UART_MCR_XONANY);
++
++                /* To set hardware flow control to the specified *
++                 * serial port, in SP1/2_CONTROL_REG             */
++
++		if (port->number) {
++			data = 0x001;
++			SendMosCmd(port->serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
++		} else {
++			data = 0x002;
++			SendMosCmd(port->serial,MOS_WRITE,MOS_MAX_PORT,0x08, &data);
++		}
++	} else {
++		mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
++	}
++
++	data = mos7720_port->shadowMCR;
++	SendMosCmd(mos7720_port->port->serial,MOS_WRITE,port->number - port->serial->minor, UART_MCR, &data);
++
++	/* Determine divisor based on baud rate */
++	baud = tty_get_baud_rate(tty);
++	if (!baud) {
++		/* pick a default, any default... */
++        	DPRINTK("%s\n","Picked default baud...");
++		baud = 9600;
++	}
++
++	if (baud >= 230400) {
++		set_higher_rates(mos7720_port, baud);
++	        /* Enable Interrupts */
++		data = 0x0c;
++		SendMosCmd(mos7720_port->port->serial, MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
++		return;
++	}
++
++	dbg("%s - baud rate = %d", __FUNCTION__, baud);
++	status = send_cmd_write_baud_rate (mos7720_port, baud);
++
++	/* Enable Interrupts */
++	data = 0x0c;
++	SendMosCmd(mos7720_port->port->serial, MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
++
++	if (port->read_urb->status != -EINPROGRESS) {
++		port->read_urb->dev = serial->dev;
++
++		status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
++
++		if (status)
++		{
++			DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
++		}
++	}
++	return;
++}
++
++/****************************************************************************
++ * mos7720_startup
++ ****************************************************************************/
++
++static int mos7720_startup (struct usb_serial *serial)
++{
++	struct moschip_serial *mos7720_serial;
++	struct moschip_port *mos7720_port;
++	struct usb_device *dev;
++	int i;
++	char data;
++
++//	DPRINTK("%s \n"," mos7720_startup :entering..........");
++
++	if(!serial)
++	{
++		DPRINTK("%s\n","Invalid Handler");
++		return -1;
++	}
++
++	dev = serial->dev;
++
++	DPRINTK("%s\n","Entering...");
++
++	/* create our private serial structure */
++	mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
++	if (mos7720_serial == NULL) {
++		err("%s - Out of memory", __FUNCTION__);
++		return -ENOMEM;
++	}
++
++	set_serial_private(serial,mos7720_serial);
++
++	/* we set up the pointers to the endpoints in the mos7720_open *
++	 * function, as the structures aren't created yet.             */
++
++	/* set up port private structures */
++	for (i = 0; i < serial->num_ports; ++i) {
++	        mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
++		if (mos7720_port == NULL) {
++			err("%s - Out of memory", __FUNCTION__);
++			set_serial_private(serial,NULL);
++			kfree(mos7720_serial);
++			return -ENOMEM;
++		}
++
++		/* Initialize all port interrupt end point to port 0 int endpoint *
++		 * Our device has only one interrupt end point comman to all port */
++
++		serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
++
++		mos7720_port->port = serial->port[i];
++		set_port_private(serial->port[i],mos7720_port);
++
++		dbg("port number is %d", serial->port[i]->number);
++		dbg("serial number is %d", serial->minor);
++	}
++
++
++	/* setting configuration feature to one */
++	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
++
++	SendMosCmd(serial,MOS_READ,0x00, UART_LSR, &data);  // LSR For Port 1
++	DPRINTK("LSR:%x\n",data);
++
++	SendMosCmd(serial,MOS_READ,0x01, UART_LSR, &data);  // LSR For Port 2
++	DPRINTK("LSR:%x\n",data);
++
++	return 0;
++}
++
++
++
++/****************************************************************************
++ * mos7720_shutdown
++ *	This function is called whenever the device is removed from the usb bus.
++ ****************************************************************************/
++
++static void mos7720_shutdown (struct usb_serial *serial)
++{
++	int i;
++
++	dbg("%s \n"," shutdown :entering..........");
++
++	/* check for the ports to be closed,close the ports and disconnect */
++
++	/* free private structure allocated for serial port  *
++	 * stop reads and writes on all ports   	     */
++
++	for (i=0; i < serial->num_ports; ++i) {
++		kfree(get_port_private(serial->port[i]));
++		set_port_private(serial->port[i],NULL);
++	}
++
++	/* free private structure allocated for serial device */
++	kfree(get_serial_private(serial));
++	set_serial_private(serial,NULL);
++
++	dbg("%s\n","Thank u :: ASPIRE COMMUNICATIONS");
++}
++
++
++/****************************************************************************
++ * moschip7720_2port_driver
++ *              Structure defining MCS7720, usb serail device
++ ****************************************************************************/
++
++static struct usb_serial_driver moschip7720_2port_driver = {
++	.driver = {
++		.owner =	THIS_MODULE,
++		.name =		"moschip7720",
++	},
++	.description		= "Moschip 2 port adapter",
++	.id_table		= moschip_port_id_table,
++	.num_interrupt_in	= 1,
++	.num_bulk_in		= 2,
++	.num_bulk_out		= 2,
++	.num_ports		= 2,
++	.open			= mos7720_open,
++	.close			= mos7720_close,
++	.throttle		= mos7720_throttle,
++	.unthrottle		= mos7720_unthrottle,
++	.attach			= mos7720_startup,
++	.shutdown		= mos7720_shutdown,
++	.ioctl			= mos7720_ioctl,
++	.set_termios		= mos7720_set_termios,
++	.write			= mos7720_write,
++	.write_room		= mos7720_write_room,
++	.chars_in_buffer	= mos7720_chars_in_buffer,
++	.break_ctl		= mos7720_break,
++	.read_bulk_callback	= mos7720_bulk_in_callback,
++};
++
++static struct usb_driver usb_driver = {
++	.name =		"moschip7720",
++	.probe =	usb_serial_probe,
++	.disconnect =	usb_serial_disconnect,
++	.id_table =	moschip_port_id_table,
++};
++
++ int __init moschip7720_init(void)
++{
++	int retval;
++
++	DPRINTK("%s \n"," mos7720_init :entering..........");
++
++	/* Register with the usb serial */
++	retval = usb_serial_register (&moschip7720_2port_driver);
++
++	if(retval)
++		goto failed_port_device_register;
++
++	DPRINTK("%s\n","Entring...");
++	info(DRIVER_DESC " " DRIVER_VERSION);
++
++	/* Register with the usb */
++	retval = usb_register(&usb_driver);
++	if (retval)
++		goto failed_usb_register;
++
++	return 0;
++
++failed_usb_register:
++	usb_serial_deregister(&moschip7720_2port_driver);
++
++failed_port_device_register:
++	return retval;
++}
++
++/****************************************************************************
++ * moschip7720_exit
++ *	Called when the driver is about to be unloaded.
++ ****************************************************************************/
++void __exit moschip7720_exit (void)
++{
++	usb_deregister(&usb_driver);
++	usb_serial_deregister(&moschip7720_2port_driver);
++}
++
++module_init(moschip7720_init);
++module_exit(moschip7720_exit);
++
++/* Module information */
++MODULE_AUTHOR( DRIVER_AUTHOR );
++MODULE_DESCRIPTION( DRIVER_DESC );
++MODULE_LICENSE("GPL");
++
++MODULE_PARM_DESC(debug, "Debug enabled or not");