Staging: add aten2011 usb to serial converter driver.
authorGreg Kroah-Hartman <gregkh@suse.de>
Wed, 28 Jan 2009 07:28:27 +0000 (23:28 -0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 3 Apr 2009 21:53:36 +0000 (14:53 -0700)
Many thanks to Russell Lang <gsview@ghostgum.com.au> for his
help in getting this working on newer kernel versions and
for pointing out this driver in the first place.

Cc: Russell Lang <gsview@ghostgum.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/staging/Kconfig
drivers/staging/Makefile
drivers/staging/uc2322/Kconfig [new file with mode: 0644]
drivers/staging/uc2322/Makefile [new file with mode: 0644]
drivers/staging/uc2322/TODO [new file with mode: 0644]
drivers/staging/uc2322/aten2011.c [new file with mode: 0644]
drivers/staging/uc2322/aten2011.h [new file with mode: 0644]
drivers/staging/uc2322/aten2011_16C50.h [new file with mode: 0644]

index 937ad6fea8370955fb731b1d0e1465ff338f49ea..e1f4e19f958f9e6e2e24236fbf752f374f4c84a8 100644 (file)
@@ -99,5 +99,7 @@ source "drivers/staging/pohmelfs/Kconfig"
 
 source "drivers/staging/stlc45xx/Kconfig"
 
+source "drivers/staging/uc2322/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING
index 88be12e223c45149ad4eb60dcaca9ce32617b850..a7177d206eb7b5a6d0d702ff662144c2138d5b4a 100644 (file)
@@ -32,3 +32,4 @@ obj-$(CONFIG_ANDROID)         += android/
 obj-$(CONFIG_DST)              += dst/
 obj-$(CONFIG_POHMELFS)         += pohmelfs/
 obj-$(CONFIG_STLC45XX)         += stlc45xx/
+obj-$(CONFIG_USB_SERIAL_ATEN2011)      += uc2322/
diff --git a/drivers/staging/uc2322/Kconfig b/drivers/staging/uc2322/Kconfig
new file mode 100644 (file)
index 0000000..2e0c6e7
--- /dev/null
@@ -0,0 +1,10 @@
+config USB_SERIAL_ATEN2011
+       tristate "ATEN 2011 USB to serial device support"
+       depends on USB_SERIAL
+       default N
+       ---help---
+         Say Y here if you want to use a ATEN 2011 dual port USB to serial
+         adapter.
+
+         To compile this driver as a module, choose M here: the module will be
+         called aten2011.
diff --git a/drivers/staging/uc2322/Makefile b/drivers/staging/uc2322/Makefile
new file mode 100644 (file)
index 0000000..49c18d6
--- /dev/null
@@ -0,0 +1 @@
+obj-$(CONFIG_USB_SERIAL_ATEN2011)      += aten2011.o
diff --git a/drivers/staging/uc2322/TODO b/drivers/staging/uc2322/TODO
new file mode 100644 (file)
index 0000000..8d96ad4
--- /dev/null
@@ -0,0 +1,8 @@
+TODO:
+       - checkpatch.pl cleanups
+       - sparse cleanups
+       - remove dead and useless code (auditing the tty ioctls to
+         verify that they really are correct and needed.)
+
+Please send any patches to Greg Kroah-Hartman <greg@kroah.com> and
+Russell Lang <gsview@ghostgum.com.au>.
diff --git a/drivers/staging/uc2322/aten2011.c b/drivers/staging/uc2322/aten2011.c
new file mode 100644 (file)
index 0000000..2c3e477
--- /dev/null
@@ -0,0 +1,3625 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+/*************************************************************************
+ *** --------------------------------------------------------------------
+ ***
+ *** Project Name: ATENINTL
+ ***
+ *** Module Name: ATEN2011
+ ***
+ *** File: aten2011.c
+ ***
+ ***
+ *** File Revision: 1.2
+ ***
+ *** Revision Date:  2009-01-16
+ ***
+ ***
+ *** Purpose     : It gives an interface between USB to  4 Serial
+ ***                and serves as a Serial Driver for the high
+ ***               level layers /applications.
+ ***
+ *** Change History:
+ ***   Modified from ATEN revision 1.2 for Linux kernel 2.6.26 or later
+ ***
+ *** LEGEND      :
+ ***
+ ***
+ *** DBG - Code inserted due to as part of debugging
+ *** DPRINTK - Debug Print statement
+ ***
+ *************************************************************************/
+
+/* all file inclusion goes here */
+
+
+#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/ioctl.h>
+#include <linux/usb.h>
+#include <asm/uaccess.h>
+
+
+#define KERNEL_2_6             1
+
+#include <linux/usb/serial.h>
+#include "aten2011.h"            /* ATEN2011 Defines    */
+#include "aten2011_16C50.h"    /* 16C50 UART defines */
+
+/* all defines goes here */
+
+/*
+ * Debug related defines
+ */
+
+/* 1: Enables the debugging -- 0: Disable the debugging */
+
+//#define printk //
+
+#define ATEN_DEBUG     0
+
+#ifdef ATEN_DEBUG
+       static int debug = 0;
+       #define DPRINTK(fmt, args...) printk( "%s: " fmt, __FUNCTION__ , ## args)
+
+#else
+       static int debug = 0;
+       #define DPRINTK(fmt, args...)
+
+#endif
+//#undef DPRINTK
+//     #define DPRINTK(fmt, args...)
+
+
+
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "1.3.1"
+#define DRIVER_DESC "ATENINTL 2011 USB Serial Adapter"
+
+/*
+ * Defines used for sending commands to port
+ */
+
+#define WAIT_FOR_EVER   (HZ * 0 ) /* timeout urb is wait for ever*/
+#define ATEN_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */
+
+#define ATEN_PORT1       0x0200
+#define ATEN_PORT2       0x0300
+#define ATEN_VENREG      0x0000
+#define ATEN_MAX_PORT   0x02
+#define ATEN_WRITE       0x0E
+#define ATEN_READ        0x0D
+
+/* Requests */
+#define ATEN_RD_RTYPE 0xC0
+#define ATEN_WR_RTYPE 0x40
+#define ATEN_RDREQ    0x0D
+#define ATEN_WRREQ    0x0E
+#define ATEN_CTRL_TIMEOUT        500
+#define VENDOR_READ_LENGTH                      (0x01)
+
+
+int ATEN2011_Thr_cnt;
+//int ATEN2011_spectrum_2or4ports; //this says the number of ports in the device
+//int NoOfOpenPorts;
+
+int RS485mode=0; //set to 1 for RS485 mode and 0 for RS232 mode
+
+static struct usb_serial* ATEN2011_get_usb_serial (struct usb_serial_port *port, const
+char *function);
+static int ATEN2011_serial_paranoia_check (struct usb_serial *serial, const char
+*function);
+static int ATEN2011_port_paranoia_check (struct usb_serial_port *port, const char
+*function);
+
+
+/* setting and get register values */
+static int ATEN2011_set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 val);
+static int ATEN2011_get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 * val);
+static int ATEN2011_set_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 val);
+static int ATEN2011_get_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 * val);
+
+void ATEN2011_Dump_serial_port(struct ATENINTL_port *ATEN2011_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 ATEN2011_set_serial_private(struct usb_serial *serial, struct ATENINTL_serial *data)
+{
+               usb_set_serial_data(serial, (void *)data );
+}
+
+static inline struct ATENINTL_serial * ATEN2011_get_serial_private(struct usb_serial *serial)
+{
+               return (struct ATENINTL_serial*) usb_get_serial_data(serial);
+}
+
+static inline void ATEN2011_set_port_private(struct usb_serial_port *port, struct ATENINTL_port *data)
+{
+               usb_set_serial_port_data(port, (void*)data );
+}
+
+static inline struct ATENINTL_port * ATEN2011_get_port_private(struct usb_serial_port *port)
+{
+       return (struct ATENINTL_port*) usb_get_serial_port_data(port);
+}
+
+/*
+Description:- To set the Control register by calling usb_fill_control_urb function by passing usb_sndctrlpipe function as parameter.
+
+Input Parameters:
+usb_serial_port:  Data Structure usb_serialport correponding to that seril port.
+Reg: Register Address
+Val:  Value to set in the Register.
+ */
+
+static int ATEN2011_set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16  val)
+{
+        struct usb_device *dev = port->serial->dev;
+       val = val & 0x00ff;
+       DPRINTK("ATEN2011_set_reg_sync offset is %x, value %x\n",reg,val);
+
+
+        return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ,
+                        ATEN_WR_RTYPE, val, reg, NULL, 0,ATEN_WDR_TIMEOUT);
+}
+
+
+
+/*
+Description:- To set the Uart register by calling usb_fill_control_urb function by passing usb_rcvctrlpipe function as parameter.
+
+Input Parameters:
+usb_serial_port:  Data Structure usb_serialport correponding to that seril port.
+Reg: Register Address
+Val:  Value to receive from the Register.
+ */
+
+static int ATEN2011_get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 * val)
+{
+        struct usb_device *dev = port->serial->dev;
+        int ret=0;
+
+        ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ATEN_RDREQ,
+                        ATEN_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,ATEN_WDR_TIMEOUT);
+       DPRINTK("ATEN2011_get_reg_sync offset is %x, return val %x\n",reg,*val);
+       *val = (*val) & 0x00ff;
+        return ret;
+}
+
+
+
+/*
+Description:- To set the Uart register by calling usb_fill_control_urb function by passing usb_sndctrlpipe function as parameter.
+
+Input Parameters:
+usb_serial_port:  Data Structure usb_serialport correponding to that seril port.
+Reg: Register Address
+Val:  Value to set in the Register.
+ */
+
+static int ATEN2011_set_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16  val)
+{
+
+
+        struct usb_device *dev = port->serial->dev;
+       struct ATENINTL_serial *ATEN2011_serial;
+       int minor;
+       ATEN2011_serial = ATEN2011_get_serial_private(port->serial);
+       minor = port->serial->minor;
+       if (minor == SERIAL_TTY_NO_MINOR)
+           minor = 0;
+       val = val & 0x00ff;
+        // For the UART control registers, the application number need to be Or'ed
+
+       if(ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4)
+       {
+               val |= (((__u16)port->number - (__u16)(minor))+1)<<8;
+               DPRINTK("ATEN2011_set_Uart_Reg application number is %x\n",val);
+       }
+       else
+       {
+               if( ((__u16)port->number - (__u16)(minor)) == 0)
+               {
+               //      val= 0x100;
+               val |= (((__u16)port->number - (__u16)(minor))+1)<<8;
+               DPRINTK("ATEN2011_set_Uart_Reg application number is %x\n",val);
+               }
+               else
+               {
+               //      val=0x300;
+               val |= (((__u16)port->number - (__u16)(minor))+2)<<8;
+                       DPRINTK("ATEN2011_set_Uart_Reg application number is %x\n",val);
+               }
+       }
+        return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ATEN_WRREQ,
+                        ATEN_WR_RTYPE, val, reg, NULL, 0,ATEN_WDR_TIMEOUT);
+
+}
+
+
+/*
+Description:- To set the Control register by calling usb_fill_control_urb function by passing usb_rcvctrlpipe function as parameter.
+
+Input Parameters:
+usb_serial_port:  Data Structure usb_serialport correponding to that seril port.
+Reg: Register Address
+Val:  Value to receive from the Register.
+ */
+static int ATEN2011_get_Uart_Reg(struct usb_serial_port *port, __u16 reg, __u16 * val)
+{
+        struct usb_device *dev = port->serial->dev;
+        int ret=0;
+        __u16 Wval;
+        struct ATENINTL_serial *ATEN2011_serial;
+       int minor = port->serial->minor;
+        ATEN2011_serial = ATEN2011_get_serial_private(port->serial);
+       if (minor == SERIAL_TTY_NO_MINOR)
+           minor = 0;
+
+       //DPRINTK("application number is %4x \n",(((__u16)port->number - (__u16)(minor))+1)<<8);
+       /*Wval  is same as application number*/
+       if(ATEN2011_serial->ATEN2011_spectrum_2or4ports ==4)
+       {
+               Wval=(((__u16)port->number - (__u16)(minor))+1)<<8;
+                       DPRINTK("ATEN2011_get_Uart_Reg application number is %x\n",Wval);
+       }
+       else
+       {
+               if( ((__u16)port->number - (__u16)(minor)) == 0)
+               {
+               //      Wval= 0x100;
+               Wval=(((__u16)port->number - (__u16)(minor))+1)<<8;
+                       DPRINTK("ATEN2011_get_Uart_Reg application number is %x\n",Wval);
+               }
+               else
+               {
+               //      Wval=0x300;
+               Wval=(((__u16)port->number - (__u16)(minor))+2)<<8;
+                       DPRINTK("ATEN2011_get_Uart_Reg application number is %x\n",Wval);
+               }
+       }
+       ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ATEN_RDREQ,
+                        ATEN_RD_RTYPE, Wval, reg, val,VENDOR_READ_LENGTH,ATEN_WDR_TIMEOUT);
+       *val = (*val) & 0x00ff;
+        return ret;
+}
+
+
+
+void ATEN2011_Dump_serial_port(struct ATENINTL_port *ATEN2011_port)
+{
+
+       DPRINTK("***************************************\n");
+       DPRINTK("Application number is %4x\n",ATEN2011_port->AppNum);
+       DPRINTK("SpRegOffset is %2x\n",ATEN2011_port->SpRegOffset);
+       DPRINTK("ControlRegOffset is %2x \n",ATEN2011_port->ControlRegOffset);
+       DPRINTK("DCRRegOffset is %2x \n",ATEN2011_port->DcrRegOffset);
+       //DPRINTK("ClkSelectRegOffset is %2x \n",ATEN2011_port->ClkSelectRegOffset);
+       DPRINTK("***************************************\n");
+
+}
+
+/* all structre defination goes here */
+/****************************************************************************
+ * ATENINTL2011_4port_device
+ *              Structure defining ATEN2011, usb serial device
+ ****************************************************************************/
+static struct usb_serial_driver ATENINTL2011_4port_device = {
+       .driver                 = {
+                                        .owner  = THIS_MODULE,
+                                        .name   = "ATEN2011",
+                                },
+        .description            = DRIVER_DESC,
+        .id_table               = ATENINTL_port_id_table,
+       .open                   = ATEN2011_open,
+       .close                  = ATEN2011_close,
+       .write                  = ATEN2011_write,
+       .write_room             = ATEN2011_write_room,
+       .chars_in_buffer        = ATEN2011_chars_in_buffer,
+       .throttle               = ATEN2011_throttle,
+       .unthrottle             = ATEN2011_unthrottle,
+       .calc_num_ports         = ATEN2011_calc_num_ports,
+
+#ifdef ATENSerialProbe
+       .probe                  = ATEN2011_serial_probe,
+#endif
+       .ioctl                  = ATEN2011_ioctl,
+       .set_termios            = ATEN2011_set_termios,
+       .break_ctl              = ATEN2011_break,
+//     .break_ctl              = ATEN2011_break_ctl,
+       .tiocmget               = ATEN2011_tiocmget,
+        .tiocmset               = ATEN2011_tiocmset,
+       .attach                 = ATEN2011_startup,
+       .shutdown               = ATEN2011_shutdown,
+       .read_bulk_callback     = ATEN2011_bulk_in_callback,
+       .read_int_callback      = ATEN2011_interrupt_callback,
+};
+
+static struct usb_driver io_driver = {
+       .name =         "ATEN2011",
+       .probe =        usb_serial_probe,
+       .disconnect =   usb_serial_disconnect,
+       .id_table =     id_table_combined,
+};
+
+
+
+/************************************************************************/
+/************************************************************************/
+/*            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                */
+/************************************************************************/
+/************************************************************************/
+
+/*****************************************************************************
+ * ATEN2011_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,
+ *
+ *****************************************************************************/
+//#ifdef ATEN2011
+static void ATEN2011_interrupt_callback (struct urb *urb)
+{
+       int result;
+       int length ;
+       struct ATENINTL_port   *ATEN2011_port;
+       struct ATENINTL_serial *ATEN2011_serial;
+       struct usb_serial *serial;
+       __u16 Data;
+       unsigned char *data;
+       __u8 sp[5],st;
+       int i;
+       __u16 wval;
+       int minor;
+       //printk("in the function ATEN2011_interrupt_callback Length %d, Data %x \n",urb->actual_length,(unsigned int)urb->transfer_buffer);
+       DPRINTK("%s"," : Entering\n");
+
+       ATEN2011_serial= (struct ATENINTL_serial *)urb->context;
+       if(!urb)// || ATEN2011_serial->status_polling_started == FALSE )
+       {
+               DPRINTK("%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;
+
+       //ATEN2011_serial= (struct ATENINTL_serial *)urb->context;
+       //serial  = ATEN2011_get_usb_serial(port,__FUNCTION__);
+       serial = ATEN2011_serial->serial;
+
+       /* ATENINTL get 5 bytes
+        * Byte 1 IIR Port 1 (port.number is 0)
+        * Byte 2 IIR Port 2 (port.number is 1)
+        * Byte 3 IIR Port 3 (port.number is 2)
+        * Byte 4 IIR Port 4 (port.number is 3)
+        * Byte 5 FIFO status for both */
+
+       if(length && length>5)
+       {
+               DPRINTK("%s \n","Wrong data !!!");
+               return;
+       }
+
+       /* MATRIX */
+       if(ATEN2011_serial->ATEN2011_spectrum_2or4ports == 4)
+       {
+       sp[0]=(__u8)data[0];
+       sp[1]=(__u8)data[1];
+       sp[2]=(__u8)data[2];
+       sp[3]=(__u8)data[3];
+       st=(__u8)data[4];
+       }
+       else
+       {
+       sp[0]=(__u8)data[0];
+       sp[1]=(__u8)data[2];
+       //sp[2]=(__u8)data[2];
+       //sp[3]=(__u8)data[3];
+       st=(__u8)data[4];
+
+       }
+       //      printk("%s data is sp1:%x sp2:%x sp3:%x sp4:%x status:%x\n",__FUNCTION__,sp1,sp2,sp3,sp4,st);
+       for(i=0;i<serial->num_ports;i++)
+       {
+       ATEN2011_port = ATEN2011_get_port_private(serial->port[i]);
+       minor = serial->minor;
+       if (minor == SERIAL_TTY_NO_MINOR)
+           minor = 0;
+       if((ATEN2011_serial->ATEN2011_spectrum_2or4ports == 2) && (i != 0))
+               wval = (((__u16)serial->port[i]->number - (__u16)(minor))+2)<<8;
+       else
+               wval = (((__u16)serial->port[i]->number - (__u16)(minor))+1)<<8;
+       if(ATEN2011_port->open != FALSE)
+       {
+               //printk("%s wval is:(for 2011) %x\n",__FUNCTION__,wval);
+
+               if(sp[i] & 0x01)
+               {
+                       DPRINTK("SP%d No Interrupt !!!\n",i);
+               }
+               else
+               {
+                       switch(sp[i] & 0x0f)
+                       {
+                       case SERIAL_IIR_RLS:
+                           DPRINTK("Serial Port %d: Receiver status error or ",i);
+                           DPRINTK("address bit detected in 9-bit mode\n");
+                            ATEN2011_port->MsrLsr=1;
+                            ATEN2011_get_reg(ATEN2011_port,wval,LINE_STATUS_REGISTER,&Data);
+                            break;
+                       case SERIAL_IIR_MS:
+                            DPRINTK("Serial Port %d: Modem status change\n",i);
+                            ATEN2011_port->MsrLsr=0;
+                            ATEN2011_get_reg(ATEN2011_port,wval, MODEM_STATUS_REGISTER, &Data);
+                            break;
+                       }
+               }
+       }
+
+       }
+exit:
+       if( ATEN2011_serial->status_polling_started == FALSE )
+               return;
+
+       result = usb_submit_urb (urb, GFP_ATOMIC);
+       if (result)
+       {
+               dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n", __FUNCTION__, result);
+       }
+
+       return;
+
+}
+//#endif
+static void ATEN2011_control_callback(struct urb *urb)
+{
+       unsigned char *data;
+       struct ATENINTL_port *ATEN2011_port;
+       __u8 regval=0x0;
+
+       if(!urb)
+        {
+                DPRINTK("%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;
+        }
+
+
+       ATEN2011_port = (struct ATENINTL_port *)urb->context;
+
+       DPRINTK("%s urb buffer size is %d\n",__FUNCTION__,urb->actual_length);
+       DPRINTK("%s ATEN2011_port->MsrLsr is %d port %d\n",__FUNCTION__,ATEN2011_port->MsrLsr,ATEN2011_port->port_num);
+       data=urb->transfer_buffer;
+       regval=(__u8)data[0];
+       DPRINTK("%s data is %x\n",__FUNCTION__,regval);
+       if(ATEN2011_port->MsrLsr==0)
+               handle_newMsr(ATEN2011_port,regval);
+       else if(ATEN2011_port->MsrLsr==1)
+               handle_newLsr(ATEN2011_port,regval);
+
+exit:
+       return;
+}
+int handle_newMsr(struct ATENINTL_port *port,__u8 newMsr)
+{
+       struct ATENINTL_port *ATEN2011_port;
+       struct  async_icount *icount;
+       ATEN2011_port=port;
+       icount = &ATEN2011_port->icount;
+       if (newMsr & (ATEN_MSR_DELTA_CTS | ATEN_MSR_DELTA_DSR | ATEN_MSR_DELTA_RI | ATEN_MSR_DELTA_CD)) {
+               icount = &ATEN2011_port->icount;
+
+                /* update input line counters */
+                if (newMsr & ATEN_MSR_DELTA_CTS) {
+                        icount->cts++;
+                }
+                if (newMsr & ATEN_MSR_DELTA_DSR) {
+                        icount->dsr++;
+                }
+                if (newMsr & ATEN_MSR_DELTA_CD) {
+                        icount->dcd++;
+                }
+                if (newMsr & ATEN_MSR_DELTA_RI) {
+                        icount->rng++;
+                }
+        }
+
+
+       return 0;
+}
+int handle_newLsr(struct ATENINTL_port *port,__u8 newLsr)
+{
+        struct  async_icount *icount;
+
+        dbg("%s - %02x", __FUNCTION__, newLsr);
+
+
+        if (newLsr & SERIAL_LSR_BI) {
+                //
+                // Parity and Framing errors only count if they
+                // occur exclusive of a break being
+                // received.
+                //
+                newLsr &= (__u8)(SERIAL_LSR_OE | SERIAL_LSR_BI);
+        }
+
+
+        /* update input line counters */
+        icount = &port->icount;
+        if (newLsr & SERIAL_LSR_BI) {
+                icount->brk++;
+        }
+       if (newLsr & SERIAL_LSR_OE) {
+                icount->overrun++;
+        }
+        if (newLsr & SERIAL_LSR_PE) {
+                icount->parity++;
+        }
+        if (newLsr & SERIAL_LSR_FE) {
+                icount->frame++;
+        }
+
+
+       return 0;
+}
+static int ATEN2011_get_reg(struct ATENINTL_port *ATEN,__u16 Wval, __u16 reg, __u16 * val)
+{
+        struct usb_device *dev = ATEN->port->serial->dev;
+        struct usb_ctrlrequest *dr=NULL;
+        unsigned char  *buffer=NULL;
+        int ret=0;
+        buffer= (__u8 *)ATEN->ctrl_buf;
+
+//      dr=(struct usb_ctrlrequest *)(buffer);
+        dr=(void *)(buffer + 2);
+        dr->bRequestType = ATEN_RD_RTYPE;
+        dr->bRequest = ATEN_RDREQ;
+        dr->wValue = cpu_to_le16(Wval);//0;
+        dr->wIndex = cpu_to_le16(reg);
+        dr->wLength = cpu_to_le16(2);
+
+        usb_fill_control_urb(ATEN->control_urb,dev,usb_rcvctrlpipe(dev,0),(unsigned char *)dr,buffer,2,ATEN2011_control_callback,ATEN);
+        ATEN->control_urb->transfer_buffer_length = 2;
+        ret=usb_submit_urb(ATEN->control_urb,GFP_ATOMIC);
+        return ret;
+}
+
+/*****************************************************************************
+ * ATEN2011_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 ATEN2011_bulk_in_callback (struct urb *urb)
+{
+       int                     status;
+       unsigned char           *data ;
+       struct usb_serial       *serial;
+       struct usb_serial_port  *port;
+       struct ATENINTL_serial  *ATEN2011_serial;
+       struct ATENINTL_port    *ATEN2011_port;
+       struct tty_struct *tty;
+       if(!urb)
+       {
+               DPRINTK("%s","Invalid Pointer !!!!:\n");
+               return;
+       }
+
+       if (urb->status)
+       {
+               DPRINTK("nonzero read bulk status received: %d",urb->status);
+//             if(urb->status==84)
+               //ThreadState=1;
+               return;
+       }
+
+       ATEN2011_port= (struct ATENINTL_port*)urb->context;
+       if(!ATEN2011_port)
+       {
+               DPRINTK("%s","NULL ATEN2011_port pointer \n");
+               return ;
+       }
+
+       port = (struct usb_serial_port *)ATEN2011_port->port;
+       if (ATEN2011_port_paranoia_check (port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return;
+       }
+
+       serial  = ATEN2011_get_usb_serial(port,__FUNCTION__);
+       if(!serial)
+       {
+               DPRINTK("%s\n","Bad serial pointer ");
+               return;
+       }
+
+       DPRINTK("%s\n","Entering... \n");
+
+       data = urb->transfer_buffer;
+       ATEN2011_serial = ATEN2011_get_serial_private(serial);
+
+       DPRINTK("%s","Entering ........... \n");
+
+       if (urb->actual_length)
+       {
+//MATRIX
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+               tty = tty_port_tty_get(&ATEN2011_port->port->port);
+#elif LINUX_VERSION_CODE == KERNEL_VERSION(2,6,27)
+               tty = ATEN2011_port->port->port.tty;
+#else
+               tty = ATEN2011_port->port->tty;
+#endif
+               if (tty)
+               {
+                       tty_buffer_request_room(tty, urb->actual_length);
+                       tty_insert_flip_string(tty, data, urb->actual_length);
+                               DPRINTK(" %s \n",data);
+                       tty_flip_buffer_push(tty);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+                       tty_kref_put(tty);
+#endif
+               }
+
+
+               ATEN2011_port->icount.rx += urb->actual_length;
+               DPRINTK("ATEN2011_port->icount.rx is %d:\n",ATEN2011_port->icount.rx);
+//MATRIX
+       }
+
+       if(!ATEN2011_port->read_urb)
+       {
+               DPRINTK("%s","URB KILLED !!!\n");
+               return;
+       }
+
+       if(ATEN2011_port->read_urb->status!=-EINPROGRESS)
+       {
+               ATEN2011_port->read_urb->dev = serial->dev;
+
+               status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC);
+
+               if (status)
+               {
+                       DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
+               }
+       }
+}
+
+/*****************************************************************************
+ * ATEN2011_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 ATEN2011_bulk_out_data_callback (struct urb *urb)
+{
+       struct ATENINTL_port *ATEN2011_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;
+       }
+
+       ATEN2011_port = (struct ATENINTL_port *)urb->context;
+       if(!ATEN2011_port)
+       {
+               DPRINTK("%s","NULL ATEN2011_port pointer \n");
+               return ;
+       }
+
+       if (ATEN2011_port_paranoia_check (ATEN2011_port->port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return;
+       }
+
+       DPRINTK("%s \n","Entering .........");
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+       tty = tty_port_tty_get(&ATEN2011_port->port->port);
+#elif LINUX_VERSION_CODE == KERNEL_VERSION(2,6,27)
+       tty = ATEN2011_port->port->port.tty;
+#else
+       tty = ATEN2011_port->port->tty;
+#endif
+
+       if (tty && ATEN2011_port->open)
+       {
+               /* let the tty driver wakeup if it has a special *
+                * write_wakeup function                         */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+               if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) {
+                       (tty->ldisc.write_wakeup)(tty);
+               }
+#endif
+
+               /* tell the tty driver that something has changed */
+               wake_up_interruptible(&tty->write_wait);
+       }
+
+       /* Release the Write URB */
+       ATEN2011_port->write_in_progress = FALSE;
+
+//schedule_work(&ATEN2011_port->port->work);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
+       tty_kref_put(tty);
+#endif
+
+}
+
+
+
+
+
+
+/************************************************************************/
+/*       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       */
+/************************************************************************/
+#ifdef ATENSerialProbe
+static int ATEN2011_serial_probe(struct usb_serial *serial, const struct usb_device_id *id)
+{
+
+       /*need to implement the mode_reg reading and updating\
+                        structures usb_serial_ device_type\
+                       (i.e num_ports, num_bulkin,bulkout etc)*/
+       /* Also we can update the changes  attach */
+       return 1;
+}
+#endif
+
+/*****************************************************************************
+ * 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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_open(struct tty_struct *tty, struct usb_serial_port *port, struct file * filp)
+#else
+static int ATEN2011_open(struct usb_serial_port *port, struct file * filp)
+#endif
+{
+    int response;
+    int j;
+    struct usb_serial *serial;
+//    struct usb_serial_port *port0;
+    struct urb *urb;
+    __u16 Data;
+    int status;
+    struct ATENINTL_serial *ATEN2011_serial;
+    struct ATENINTL_port *ATEN2011_port;
+    struct ktermios tmp_termios;
+    int minor;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+    struct tty_struct *tty = NULL;
+#endif
+       if (ATEN2011_port_paranoia_check (port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return -ENODEV;
+       }
+
+       //ATEN2011_serial->NoOfOpenPorts++;
+       serial = port->serial;
+
+       if (ATEN2011_serial_paranoia_check (serial, __FUNCTION__))
+       {
+               DPRINTK("%s","Serial Paranoia failed \n");
+               return -ENODEV;
+       }
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if (ATEN2011_port == NULL)
+               return -ENODEV;
+/*
+       if (ATEN2011_port->ctrl_buf==NULL)
+        {
+                ATEN2011_port->ctrl_buf = kmalloc(16,GFP_KERNEL);
+                if (ATEN2011_port->ctrl_buf == NULL) {
+                        printk(", Can't allocate ctrl buff\n");
+                        return -ENOMEM;
+                }
+
+        }
+
+       if(!ATEN2011_port->control_urb)
+       {
+       ATEN2011_port->control_urb=kmalloc(sizeof(struct urb),GFP_KERNEL);
+       }
+*/
+//     port0 = serial->port[0];
+
+       ATEN2011_serial = ATEN2011_get_serial_private(serial);
+
+       if (ATEN2011_serial == NULL )//|| port0 == NULL)
+       {
+               return -ENODEV;
+       }
+       // increment the number of opened ports counter here
+       ATEN2011_serial->NoOfOpenPorts++;
+       //printk("the num of ports opend is:%d\n",ATEN2011_serial->NoOfOpenPorts);
+
+
+       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,GFP_ATOMIC);
+                        ATEN2011_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 ATEN2011 -- Write Init values to corresponding Registers
+ *
+ * Register Index
+ * 1 : IER
+ * 2 : FCR
+ * 3 : LCR
+ * 4 : MCR
+ *
+ * 0x08 : SP1/2 Control Reg
+ *****************************************************************************/
+
+//NEED to check the fallowing Block
+
+       status=0;
+       Data=0x0;
+       status=ATEN2011_get_reg_sync(port,ATEN2011_port->SpRegOffset,&Data);
+       if(status<0){
+               DPRINTK("Reading Spreg failed\n");
+               return -1;
+       }
+       Data |= 0x80;
+       status = ATEN2011_set_reg_sync(port,ATEN2011_port->SpRegOffset,Data);
+       if(status<0){
+               DPRINTK("writing Spreg failed\n");
+               return -1;
+       }
+
+       Data &= ~0x80;
+       status = ATEN2011_set_reg_sync(port,ATEN2011_port->SpRegOffset,Data);
+       if(status<0){
+               DPRINTK("writing Spreg failed\n");
+               return -1;
+       }
+
+
+//End of block to be checked
+//**************************CHECK***************************//
+
+               if(RS485mode==0)
+                       Data = 0xC0;
+              else
+                        Data = 0x00;
+                status=0;
+                status=ATEN2011_set_Uart_Reg(port,SCRATCH_PAD_REGISTER,Data);
+                if(status<0) {
+                        DPRINTK("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
+                        return -1;
+                }
+                else DPRINTK("SCRATCH_PAD_REGISTER Writing success status%d\n",status);
+
+
+//**************************CHECK***************************//
+
+       status=0;
+       Data=0x0;
+       status=ATEN2011_get_reg_sync(port,ATEN2011_port->ControlRegOffset,&Data);
+       if(status<0){
+               DPRINTK("Reading Controlreg failed\n");
+               return -1;
+       }
+       Data |= 0x08;//Driver done bit
+       /*
+       status = ATEN2011_set_reg_sync(port,ATEN2011_port->ControlRegOffset,Data);
+       if(status<0){
+               DPRINTK("writing Controlreg failed\n");
+               return -1;
+       }
+       */
+       Data |= 0x20;//rx_disable
+       status=0;
+       status = ATEN2011_set_reg_sync(port,ATEN2011_port->ControlRegOffset,Data);
+       if(status<0){
+               DPRINTK("writing Controlreg failed\n");
+               return -1;
+       }
+
+       //do register settings here
+       // Set all regs to the device default values.
+       ////////////////////////////////////
+       // First Disable all interrupts.
+       ////////////////////////////////////
+
+       Data = 0x00;
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,INTERRUPT_ENABLE_REGISTER,Data);
+       if(status<0){
+               DPRINTK("disableing interrupts failed\n");
+               return -1;
+       }
+        // Set FIFO_CONTROL_REGISTER to the default value
+       Data = 0x00;
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,FIFO_CONTROL_REGISTER,Data);
+       if(status<0){
+               DPRINTK("Writing FIFO_CONTROL_REGISTER  failed\n");
+               return -1;
+       }
+
+       Data = 0xcf;  //chk
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,FIFO_CONTROL_REGISTER,Data);
+       if(status<0){
+               DPRINTK("Writing FIFO_CONTROL_REGISTER  failed\n");
+               return -1;
+       }
+
+       Data = 0x03; //LCR_BITS_8
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+       ATEN2011_port->shadowLCR=Data;
+
+       Data = 0x0b; // MCR_DTR|MCR_RTS|MCR_MASTER_IE
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+       ATEN2011_port->shadowMCR=Data;
+
+#ifdef Check
+       Data = 0x00;
+       status=0;
+       status = ATEN2011_get_Uart_Reg(port,LINE_CONTROL_REGISTER,&Data);
+       ATEN2011_port->shadowLCR=Data;
+
+       Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
+       status = 0;
+       status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+
+       Data = 0x0c;
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_LSB,Data);
+
+       Data = 0x0;
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_MSB,Data);
+
+       Data = 0x00;
+       status=0;
+       status = ATEN2011_get_Uart_Reg(port,LINE_CONTROL_REGISTER,&Data);
+
+//     Data = ATEN2011_port->shadowLCR; //data latch disable
+       Data = Data & ~SERIAL_LCR_DLAB;
+       status = 0;
+       status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+       ATEN2011_port->shadowLCR=Data;
+#endif
+       //clearing Bulkin and Bulkout Fifo
+       Data = 0x0;
+       status = 0;
+       status = ATEN2011_get_reg_sync(port,ATEN2011_port->SpRegOffset,&Data);
+
+       Data = Data | 0x0c;
+       status = 0;
+        status = ATEN2011_set_reg_sync(port,ATEN2011_port->SpRegOffset,Data);
+
+       Data = Data & ~0x0c;
+       status = 0;
+        status = ATEN2011_set_reg_sync(port,ATEN2011_port->SpRegOffset,Data);
+       //Finally enable all interrupts
+       Data = 0x0;
+       Data = 0x0c;
+       status = 0;
+        status = ATEN2011_set_Uart_Reg(port,INTERRUPT_ENABLE_REGISTER,Data);
+
+       //clearing rx_disable
+       Data = 0x0;
+       status = 0;
+        status = ATEN2011_get_reg_sync(port,ATEN2011_port->ControlRegOffset,&Data);
+       Data = Data & ~0x20;
+       status = 0;
+        status = ATEN2011_set_reg_sync(port,ATEN2011_port->ControlRegOffset,Data);
+
+       // rx_negate
+       Data = 0x0;
+       status = 0;
+        status = ATEN2011_get_reg_sync(port,ATEN2011_port->ControlRegOffset,&Data);
+       Data = Data |0x10;
+       status = 0;
+        status = ATEN2011_set_reg_sync(port,ATEN2011_port->ControlRegOffset,Data);
+
+
+       /* 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 LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = port->tty;
+#endif
+       if (tty)
+               tty->low_latency = 1;
+/*
+       printk("port number is %d \n",port->number);
+       printk("serial number is %d \n",port->serial->minor);
+       printk("Bulkin endpoint is %d \n",port->bulk_in_endpointAddress);
+       printk("BulkOut endpoint is %d \n",port->bulk_out_endpointAddress);
+       printk("Interrupt endpoint is %d \n",port->interrupt_in_endpointAddress);
+       printk("port's number in the device is %d\n",ATEN2011_port->port_num);
+*/
+////////////////////////
+//#ifdef CheckStatusPipe
+/* Check to see if we've set up our endpoint info yet    *
+     * (can't set it up in ATEN2011_startup as the structures *
+     * were not set up at that time.)                        */
+if(ATEN2011_serial->NoOfOpenPorts==1)
+{
+       // start the status polling here
+       ATEN2011_serial->status_polling_started = TRUE;
+       //if (ATEN2011_serial->interrupt_in_buffer == NULL)
+       // {
+               /* If not yet set, Set here */
+                ATEN2011_serial->interrupt_in_buffer = serial->port[0]->interrupt_in_buffer;
+         ATEN2011_serial->interrupt_in_endpoint = serial->port[0]->interrupt_in_endpointAddress;
+               //printk(" interrupt endpoint:%d \n",ATEN2011_serial->interrupt_in_endpoint);
+                ATEN2011_serial->interrupt_read_urb = serial->port[0]->interrupt_in_urb;
+
+                /* set up interrupt urb */
+               usb_fill_int_urb(                                   \
+                        ATEN2011_serial->interrupt_read_urb,     \
+                        serial->dev,                            \
+                        usb_rcvintpipe(serial->dev,ATEN2011_serial->interrupt_in_endpoint),    \
+                        ATEN2011_serial->interrupt_in_buffer,             \
+                        ATEN2011_serial->interrupt_read_urb->transfer_buffer_length,\
+                       ATEN2011_interrupt_callback, ATEN2011_serial,     \
+                        ATEN2011_serial->interrupt_read_urb->interval  );
+
+       /* start interrupt read for ATEN2011               *
+                 * will continue as long as ATEN2011 is connected  */
+
+               response = usb_submit_urb (ATEN2011_serial->interrupt_read_urb,GFP_KERNEL);
+                if (response)
+                {
+                        DPRINTK("%s - Error %d submitting interrupt urb", __FUNCTION__, response);
+                }
+       //      else
+                       // printk(" interrupt URB submitted\n");
+
+        //}
+
+}
+//#endif
+
+
+///////////////////////
+       /* see if we've set up our endpoint info yet   *
+        * (can't set it up in ATEN2011_startup as the  *
+        * structures were not set up at that time.)   */
+
+       DPRINTK("port number is %d \n",port->number);
+       DPRINTK("serial number is %d \n",port->serial->minor);
+       DPRINTK("Bulkin endpoint is %d \n",port->bulk_in_endpointAddress);
+       DPRINTK("BulkOut endpoint is %d \n",port->bulk_out_endpointAddress);
+       DPRINTK("Interrupt endpoint is %d \n",port->interrupt_in_endpointAddress);
+       DPRINTK("port's number in the device is %d\n",ATEN2011_port->port_num);
+       ATEN2011_port->bulk_in_buffer    = port->bulk_in_buffer;
+       ATEN2011_port->bulk_in_endpoint  = port->bulk_in_endpointAddress;
+       ATEN2011_port->read_urb          = port->read_urb;
+       ATEN2011_port->bulk_out_endpoint = port->bulk_out_endpointAddress;
+
+        minor = port->serial->minor;
+       if (minor == SERIAL_TTY_NO_MINOR)
+           minor = 0;
+
+       /* set up our bulk in urb */
+       if((ATEN2011_serial->ATEN2011_spectrum_2or4ports==2)&&(((__u16)port->number - (__u16)(minor)) != 0))
+        {
+        usb_fill_bulk_urb(
+                ATEN2011_port->read_urb,serial->dev,\
+               usb_rcvbulkpipe(serial->dev, (port->bulk_in_endpointAddress+2)),\
+                port->bulk_in_buffer,\
+                ATEN2011_port->read_urb->transfer_buffer_length,         \
+                ATEN2011_bulk_in_callback,ATEN2011_port);
+        }
+        else
+       usb_fill_bulk_urb(
+               ATEN2011_port->read_urb,                                \
+               serial->dev,                                            \
+               usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),\
+               port->bulk_in_buffer,                                   \
+               ATEN2011_port->read_urb->transfer_buffer_length,                \
+               ATEN2011_bulk_in_callback,ATEN2011_port);
+
+       DPRINTK("ATEN2011_open: bulkin endpoint is %d\n",port->bulk_in_endpointAddress);
+       response = usb_submit_urb (ATEN2011_port->read_urb,GFP_KERNEL);
+       if (response)
+        {
+                err("%s - Error %d submitting control urb", __FUNCTION__, response);
+        }
+
+        /* initialize our wait queues */
+        init_waitqueue_head(&ATEN2011_port->wait_open);
+        init_waitqueue_head(&ATEN2011_port->wait_chase);
+        init_waitqueue_head(&ATEN2011_port->delta_msr_wait);
+        init_waitqueue_head(&ATEN2011_port->wait_command);
+
+        /* initialize our icount structure */
+        memset (&(ATEN2011_port->icount), 0x00, sizeof(ATEN2011_port->icount));
+
+        /* initialize our port settings */
+        ATEN2011_port->shadowMCR  = MCR_MASTER_IE; /* Must set to enable ints! */
+        ATEN2011_port->chaseResponsePending = FALSE;
+        /* send a open port command */
+        ATEN2011_port->openPending = FALSE;
+        ATEN2011_port->open        = TRUE;
+       //ATEN2011_change_port_settings(ATEN2011_port,old_termios);
+       /* Setup termios */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       ATEN2011_set_termios (tty, port, &tmp_termios);
+#else
+       ATEN2011_set_termios (port, &tmp_termios);
+#endif
+        ATEN2011_port->rxBytesAvail = 0x0;
+       ATEN2011_port->icount.tx=0;
+       ATEN2011_port->icount.rx=0;
+
+        DPRINTK("\n\nusb_serial serial:%x       ATEN2011_port:%x\nATEN2011_serial:%x      usb_serial_port port:%x\n\n",(unsigned int)serial,(unsigned int)ATEN2011_port,(unsigned int)ATEN2011_serial,(unsigned int)port);
+
+
+
+
+        return 0;
+
+}
+
+
+/*****************************************************************************
+ * ATEN2011_close
+ *     this function is called by the tty driver when a port is closed
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp)
+#else
+static void ATEN2011_close(struct usb_serial_port *port, struct file *filp)
+#endif
+{
+       struct usb_serial *serial;
+       struct ATENINTL_serial *ATEN2011_serial;
+       struct ATENINTL_port *ATEN2011_port;
+       int     no_urbs;
+       __u16   Data;
+       //__u16   Data1= 20;
+
+       DPRINTK("%s\n","ATEN2011_close:entering...");
+       /* MATRIX  */
+       //ThreadState = 1;
+       /* MATRIX  */
+       //printk("Entering... :ATEN2011_close\n");
+       if (ATEN2011_port_paranoia_check (port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return;
+       }
+       serial = ATEN2011_get_usb_serial (port, __FUNCTION__);
+       if (!serial)
+       {
+               DPRINTK("%s","Serial Paranoia failed \n");
+               return;
+       }
+       // take the Adpater and port's private data
+       ATEN2011_serial = ATEN2011_get_serial_private(serial);
+       ATEN2011_port = ATEN2011_get_port_private(port);
+       if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL))
+       {
+               return;
+       }
+       if (serial->dev)
+       {
+               /* flush and block(wait) until tx is empty*/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               ATEN2011_block_until_tx_empty(tty, ATEN2011_port);
+#else
+               ATEN2011_block_until_tx_empty(ATEN2011_port);
+#endif
+       }
+       // kill the ports URB's
+       for (no_urbs = 0; no_urbs < NUM_URBS;no_urbs++)
+               usb_kill_urb (ATEN2011_port->write_urb_pool[no_urbs]);
+       /* Freeing Write URBs*/
+       for (no_urbs = 0; no_urbs< NUM_URBS; ++no_urbs)
+       {
+               if (ATEN2011_port->write_urb_pool[no_urbs])
+                {
+                       if (ATEN2011_port->write_urb_pool[no_urbs]->transfer_buffer)
+                               kfree(ATEN2011_port->write_urb_pool[no_urbs]->transfer_buffer);
+                       usb_free_urb (ATEN2011_port->write_urb_pool[no_urbs]);
+                }
+        }
+       /* While closing port, shutdown all bulk read, write  *
+        * and interrupt read if they exists                  */
+       if (serial->dev)
+       {
+               if (ATEN2011_port->write_urb)
+               {
+                       DPRINTK("%s","Shutdown bulk write\n");
+                       usb_kill_urb (ATEN2011_port->write_urb);
+               }
+               if (ATEN2011_port->read_urb)
+               {
+                       DPRINTK("%s","Shutdown bulk read\n");
+                       usb_kill_urb (ATEN2011_port->read_urb);
+               }
+               if((&ATEN2011_port->control_urb))
+               {
+                       DPRINTK("%s","Shutdown control read\n");
+               //      usb_kill_urb (ATEN2011_port->control_urb);
+
+               }
+       }
+       //if(ATEN2011_port->ctrl_buf != NULL)
+       //kfree(ATEN2011_port->ctrl_buf);
+       // decrement the no.of open ports counter of an individual USB-serial adapter.
+       ATEN2011_serial->NoOfOpenPorts--;
+    DPRINTK("NoOfOpenPorts in close%d:in port%d\n",ATEN2011_serial->NoOfOpenPorts,port->number);
+       //printk("the num of ports opend is:%d\n",ATEN2011_serial->NoOfOpenPorts);
+       if(ATEN2011_serial->NoOfOpenPorts==0)
+       {
+               //stop the stus polling here
+               //printk("disabling the status polling flag to FALSE :\n");
+               ATEN2011_serial->status_polling_started = FALSE;
+               if(ATEN2011_serial->interrupt_read_urb)
+               {
+                       DPRINTK("%s","Shutdown interrupt_read_urb\n");
+                       //ATEN2011_serial->interrupt_in_buffer=NULL;
+                       //usb_kill_urb (ATEN2011_serial->interrupt_read_urb);
+               }
+       }
+       if (ATEN2011_port->write_urb)
+       {
+               /* if this urb had a transfer buffer already (old tx) free it */
+               if (ATEN2011_port->write_urb->transfer_buffer != NULL)
+               {
+                       kfree(ATEN2011_port->write_urb->transfer_buffer);
+               }
+               usb_free_urb(ATEN2011_port->write_urb);
+       }
+       // clear the MCR & IER
+       Data = 0x00;
+       ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+       Data = 0x00;
+       ATEN2011_set_Uart_Reg(port,INTERRUPT_ENABLE_REGISTER,Data);
+
+       //ATEN2011_get_Uart_Reg(port,MODEM_CONTROL_REGISTER,&Data1);
+       //printk("value of MCR after closing the port is : 0x%x\n",Data1);
+
+       ATEN2011_port->open         = FALSE;
+       ATEN2011_port->closePending = FALSE;
+       ATEN2011_port->openPending  = FALSE;
+       DPRINTK("%s \n","Leaving ............");
+
+}
+
+
+/*****************************************************************************
+ * SerialBreak
+ *     this function sends a break to the port
+ *****************************************************************************/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_break(struct tty_struct *tty, int break_state)
+#else
+static void ATEN2011_break(struct usb_serial_port *port, int break_state)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#endif
+        unsigned char data;
+       struct usb_serial *serial;
+       struct ATENINTL_serial *ATEN2011_serial;
+       struct ATENINTL_port *ATEN2011_port;
+
+       DPRINTK("%s \n","Entering ...........");
+       DPRINTK("ATEN2011_break: Start\n");
+
+       if (ATEN2011_port_paranoia_check (port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return;
+       }
+
+       serial = ATEN2011_get_usb_serial (port, __FUNCTION__);
+       if (!serial)
+       {
+               DPRINTK("%s","Serial Paranoia failed \n");
+               return;
+       }
+
+       ATEN2011_serial = ATEN2011_get_serial_private(serial);
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if ((ATEN2011_serial == NULL) || (ATEN2011_port == NULL))
+       {
+               return;
+       }
+
+       /* flush and chase */
+       ATEN2011_port->chaseResponsePending = TRUE;
+
+       if (serial->dev)
+       {
+
+               /* flush and block until tx is empty*/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               ATEN2011_block_until_chase_response(tty, ATEN2011_port);
+#else
+               ATEN2011_block_until_chase_response(ATEN2011_port);
+#endif
+       }
+
+        if(break_state == -1)
+        {
+                data = ATEN2011_port->shadowLCR | LCR_SET_BREAK;
+        }
+        else
+        {
+                data = ATEN2011_port->shadowLCR & ~LCR_SET_BREAK;
+        }
+
+        ATEN2011_port->shadowLCR  = data;
+       DPRINTK("ATEN2011_break ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR);
+       ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,ATEN2011_port->shadowLCR);
+
+       return;
+}
+
+
+/************************************************************************
+ *
+ * ATEN2011_block_until_chase_response
+ *
+ *     This function will block the close until one of the following:
+ *             1. Response to our Chase comes from ATEN2011
+ *             2. A timout of 10 seconds without activity has expired
+ *                (1K of ATEN2011 data @ 2400 baud ==> 4 sec to empty)
+ *
+ ************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_block_until_chase_response(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port)
+#else
+static void ATEN2011_block_until_chase_response(struct ATENINTL_port *ATEN2011_port)
+#endif
+{
+       int timeout = 1*HZ;
+       int wait = 10;
+       int count ;
+
+
+       while (1)
+       {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               count = ATEN2011_chars_in_buffer(tty);
+#else
+               count = ATEN2011_chars_in_buffer(ATEN2011_port->port);
+#endif
+
+               /* Check for Buffer status */
+               if(count<=0)
+               {
+                       ATEN2011_port->chaseResponsePending = FALSE;
+                       return;
+               }
+
+               /* Block the thread for a while */
+               interruptible_sleep_on_timeout (&ATEN2011_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;
+               }
+       }
+
+}
+
+
+/************************************************************************
+ *
+ * ATEN2011_block_until_tx_empty
+ *
+ *     This function will block the close until one of the following:
+ *             1. TX count are 0
+ *             2. The ATEN2011 has stopped
+ *             3. A timout of 3 seconds without activity has expired
+ *
+ ************************************************************************/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_block_until_tx_empty(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port)
+#else
+static void ATEN2011_block_until_tx_empty(struct ATENINTL_port *ATEN2011_port)
+#endif
+{
+       int timeout = HZ/10;
+       int wait = 30;
+       int count;
+
+       while (1)
+       {
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               count = ATEN2011_chars_in_buffer(tty);
+#else
+               count = ATEN2011_chars_in_buffer(ATEN2011_port->port);
+#endif
+
+                /* Check for Buffer status */
+               if(count<=0)
+               {
+                       return;
+               }
+
+                /* Block the thread for a while */
+               interruptible_sleep_on_timeout (&ATEN2011_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;
+               }
+       }
+}
+
+/*****************************************************************************
+ * ATEN2011_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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_write_room (struct tty_struct *tty)
+#else
+static int ATEN2011_write_room (struct usb_serial_port *port)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+    struct usb_serial_port *port = tty->driver_data;
+#endif
+    int i;
+    int room = 0;
+    struct ATENINTL_port *ATEN2011_port;
+
+
+//     DPRINTK("%s \n"," ATEN2011_write_room:entering ...........");
+
+        if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+        {
+                DPRINTK("%s","Invalid port \n");
+                DPRINTK("%s \n"," ATEN2011_write_room:leaving ...........");
+                return -1;
+        }
+
+        ATEN2011_port = ATEN2011_get_port_private(port);
+        if (ATEN2011_port == NULL)
+        {
+                DPRINTK("%s \n","ATEN2011_break:leaving ...........");
+                return -1;
+        }
+
+        for (i = 0; i < NUM_URBS; ++i)
+       {
+                if (ATEN2011_port->write_urb_pool[i]->status != -EINPROGRESS)
+               {
+                        room += URB_TRANSFER_BUFFER_SIZE;
+                }
+        }
+
+        dbg("%s - returns %d", __FUNCTION__, room);
+        return (room);
+
+}
+
+
+/*****************************************************************************
+ * ATEN2011_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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_chars_in_buffer(struct tty_struct *tty)
+#else
+static int ATEN2011_chars_in_buffer(struct usb_serial_port *port)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+    struct usb_serial_port *port = tty->driver_data;
+#endif
+       int i;
+       int chars = 0;
+       struct ATENINTL_port *ATEN2011_port;
+
+       //DPRINTK("%s \n"," ATEN2011_chars_in_buffer:entering ...........");
+
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return -1;
+       }
+
+        ATEN2011_port = ATEN2011_get_port_private(port);
+        if (ATEN2011_port == NULL)
+        {
+                DPRINTK("%s \n","ATEN2011_break:leaving ...........");
+                return -1;
+        }
+
+       for (i = 0; i < NUM_URBS; ++i)
+       {
+               if (ATEN2011_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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_write (struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count)
+#else
+static int ATEN2011_write (struct usb_serial_port *port, const unsigned char *data, int count)
+#endif
+{
+       int status;
+       int i;
+       int bytes_sent = 0;
+       int transfer_size;
+       int from_user=0;
+       int minor;
+
+       struct ATENINTL_port *ATEN2011_port;
+       struct usb_serial *serial;
+       struct ATENINTL_serial *ATEN2011_serial;
+       struct urb    *urb;
+       //__u16 Data;
+       const unsigned char *current_position = data;
+       unsigned char * data1;
+       DPRINTK("%s \n","entering ...........");
+       //DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR);
+
+       #ifdef NOTATEN2011
+       Data = 0x00;
+        status=0;
+        status = ATEN2011_get_Uart_Reg(port,LINE_CONTROL_REGISTER,&Data);
+       ATEN2011_port->shadowLCR = Data;
+       DPRINTK("ATEN2011_write: LINE_CONTROL_REGISTER is %x\n",Data);
+       DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR);
+
+       //Data = 0x03;
+        //status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+        //ATEN2011_port->shadowLCR=Data;//Need to add later
+
+        Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
+        status = 0;
+        status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+
+       //Data = 0x0c;
+        //status = ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_LSB,Data);
+        Data = 0x00;
+        status=0;
+        status = ATEN2011_get_Uart_Reg(port,DIVISOR_LATCH_LSB,&Data);
+       DPRINTK("ATEN2011_write:DLL value is %x\n",Data);
+
+        Data = 0x0;
+        status=0;
+        status = ATEN2011_get_Uart_Reg(port,DIVISOR_LATCH_MSB,&Data);
+       DPRINTK("ATEN2011_write:DLM value is %x\n",Data);
+
+        Data = Data & ~SERIAL_LCR_DLAB;
+       DPRINTK("ATEN2011_write: ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR);
+        status = 0;
+        status = ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+       #endif
+
+       if (ATEN2011_port_paranoia_check (port, __FUNCTION__))
+       {
+               DPRINTK("%s","Port Paranoia failed \n");
+               return -1;
+       }
+
+       serial = port->serial;
+       if (ATEN2011_serial_paranoia_check (serial, __FUNCTION__))
+       {
+               DPRINTK("%s","Serial Paranoia failed \n");
+               return -1;
+       }
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+       if(ATEN2011_port==NULL)
+       {
+               DPRINTK("%s","ATEN2011_port is NULL\n");
+               return -1;
+       }
+
+       ATEN2011_serial =ATEN2011_get_serial_private(serial);
+       if(ATEN2011_serial==NULL)
+       {
+               DPRINTK("%s","ATEN2011_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 (ATEN2011_port->write_urb_pool[i]->status != -EINPROGRESS)
+                       {
+                               urb = ATEN2011_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);
+
+               if (from_user)
+               {
+                       if (copy_from_user (urb->transfer_buffer, current_position, transfer_size))     {
+                               bytes_sent = -EFAULT;
+                               goto exit;
+                       }
+               }
+               else
+               {
+                       memcpy (urb->transfer_buffer, current_position, transfer_size);
+               }
+               //usb_serial_debug_data (__FILE__, __FUNCTION__, transfer_size, urb->transfer_buffer);
+
+               /* fill urb with data and submit  */
+       minor = port->serial->minor;
+       if (minor == SERIAL_TTY_NO_MINOR);
+               minor = 0;
+       if((ATEN2011_serial->ATEN2011_spectrum_2or4ports==2)&&(((__u16)port->number - (__u16)(minor)) != 0))
+        {
+                usb_fill_bulk_urb (urb,
+                 ATEN2011_serial->serial->dev,
+                 usb_sndbulkpipe(ATEN2011_serial->serial->dev,
+                 (port->bulk_out_endpointAddress)+2),
+                 urb->transfer_buffer,
+                 transfer_size,
+                 ATEN2011_bulk_out_data_callback,
+                 ATEN2011_port);
+        }
+        else
+
+
+
+               usb_fill_bulk_urb (urb,
+                ATEN2011_serial->serial->dev,
+                usb_sndbulkpipe(ATEN2011_serial->serial->dev,
+                port->bulk_out_endpointAddress),
+                urb->transfer_buffer,
+                transfer_size,
+                ATEN2011_bulk_out_data_callback,
+                ATEN2011_port);
+
+       data1=urb->transfer_buffer;
+       DPRINTK("\nbulkout endpoint is %d",port->bulk_out_endpointAddress);
+       //for(i=0;i < urb->actual_length;i++)
+       //      DPRINTK("Data is %c\n ",data1[i]);
+
+               /* 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;
+               ATEN2011_port->icount.tx += transfer_size;
+               DPRINTK("ATEN2011_port->icount.tx is %d:\n",ATEN2011_port->icount.tx);
+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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_throttle(struct tty_struct *tty)
+#else
+static void ATEN2011_throttle(struct usb_serial_port *port)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#else
+       struct tty_struct *tty;
+#endif
+       struct ATENINTL_port *ATEN2011_port;
+       int status;
+
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return;
+       }
+
+       DPRINTK("- port %d\n", port->number);
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if (ATEN2011_port == NULL)
+               return;
+
+       if (!ATEN2011_port->open)
+       {
+               DPRINTK("%s\n","port not opened");
+               return;
+       }
+
+       DPRINTK("%s","Entering .......... \n");
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = port->tty;
+#endif
+       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);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               status = ATEN2011_write(tty, port, &stop_char, 1); //FC4
+#else
+               status = ATEN2011_write(port, &stop_char, 1); //FC4
+#endif
+               if (status <= 0)
+               {
+                       return;
+               }
+       }
+
+       /* if we are implementing RTS/CTS, toggle that line */
+       if (tty->termios->c_cflag & CRTSCTS)
+       {
+               ATEN2011_port->shadowMCR &= ~MCR_RTS;
+               status=0;
+               status=ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,ATEN2011_port->shadowMCR);
+
+               if (status < 0)
+               {
+                       return;
+               }
+       }
+
+       return;
+}
+
+
+/*****************************************************************************
+ * ATEN2011_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)
+ *****************************************************************************/
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_unthrottle (struct tty_struct *tty)
+#else
+static void ATEN2011_unthrottle (struct usb_serial_port *port)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#else
+       struct tty_struct *tty;
+#endif
+       int status;
+       struct ATENINTL_port *ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return;
+       }
+
+       if (ATEN2011_port == NULL)
+               return;
+
+       if (!ATEN2011_port->open) {
+               dbg("%s - port not opened", __FUNCTION__);
+               return;
+       }
+
+       DPRINTK("%s","Entering .......... \n");
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = port->tty;
+#endif
+       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);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+               status = ATEN2011_write (tty, port, &start_char, 1); //FC4
+#else
+               status = ATEN2011_write (port, &start_char, 1); //FC4
+#endif
+               if (status <= 0)
+               {
+                       return;
+               }
+       }
+
+       /* if we are implementing RTS/CTS, toggle that line */
+       if (tty->termios->c_cflag & CRTSCTS)
+       {
+               ATEN2011_port->shadowMCR |= MCR_RTS;
+               status=0;
+               status=ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,ATEN2011_port->shadowMCR);
+               if (status < 0)
+               {
+                       return;
+               }
+       }
+
+       return;
+}
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_tiocmget(struct tty_struct *tty, struct file *file)
+#else
+static int ATEN2011_tiocmget(struct usb_serial_port *port, struct file *file)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#endif
+        //struct ti_port *tport = usb_get_serial_port_data(port);
+       struct ATENINTL_port *ATEN2011_port;
+        unsigned int result;
+        __u16 msr;
+        __u16 mcr;
+        //unsigned int mcr;
+       int status=0;
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+        DPRINTK("%s - port %d", __FUNCTION__, port->number);
+
+        if (ATEN2011_port == NULL)
+                return -ENODEV;
+
+       status=ATEN2011_get_Uart_Reg(port,MODEM_STATUS_REGISTER,&msr);
+       status=ATEN2011_get_Uart_Reg(port,MODEM_CONTROL_REGISTER,&mcr);
+//        mcr = ATEN2011_port->shadowMCR;
+// COMMENT2: the Fallowing three line are commented for updating only MSR values
+        result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
+                | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
+                | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
+               | ((msr & ATEN2011_MSR_CTS) ? TIOCM_CTS : 0)
+                | ((msr & ATEN2011_MSR_CD) ? TIOCM_CAR : 0)
+                | ((msr & ATEN2011_MSR_RI) ? TIOCM_RI : 0)
+                | ((msr & ATEN2011_MSR_DSR) ? TIOCM_DSR : 0);
+
+        DPRINTK("%s - 0x%04X", __FUNCTION__, result);
+
+        return result;
+}
+
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_tiocmset(struct tty_struct *tty, struct file *file,
+        unsigned int set, unsigned int clear)
+#else
+static int ATEN2011_tiocmset(struct usb_serial_port *port, struct file *file,
+        unsigned int set, unsigned int clear)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#endif
+       struct ATENINTL_port *ATEN2011_port;
+        //struct ti_port *tport = usb_get_serial_port_data(port);
+        unsigned int mcr;
+       unsigned int status;
+
+        DPRINTK("%s - port %d", __FUNCTION__, port->number);
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if (ATEN2011_port == NULL)
+                return -ENODEV;
+
+
+
+         mcr = ATEN2011_port->shadowMCR;
+        if (clear & TIOCM_RTS)
+                mcr &= ~MCR_RTS;
+        if (clear & TIOCM_DTR)
+                mcr &= ~MCR_DTR;
+        if (clear & TIOCM_LOOP)
+                mcr &= ~MCR_LOOPBACK;
+
+        if (set & TIOCM_RTS)
+                mcr |= MCR_RTS;
+        if (set & TIOCM_DTR)
+                mcr |= MCR_DTR;
+        if (set & TIOCM_LOOP)
+                mcr |= MCR_LOOPBACK;
+
+         ATEN2011_port->shadowMCR = mcr;
+
+        status=0;
+        status = ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,mcr);
+        if(status <0)
+        {
+                DPRINTK("setting MODEM_CONTROL_REGISTER Failed\n");
+                return -1;
+        }
+
+        return 0;
+}
+
+
+
+
+
+
+
+/*****************************************************************************
+ * SerialSetTermios
+ *     this function is called by the tty driver when it wants to change the termios structure
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios)
+#else
+static void ATEN2011_set_termios(struct usb_serial_port *port, struct ktermios *old_termios)
+#endif
+{
+       int status;
+       unsigned int cflag;
+       struct usb_serial *serial;
+       struct ATENINTL_port *ATEN2011_port;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       struct tty_struct *tty;
+#endif
+       DPRINTK("ATEN2011_set_termios: START\n");
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return;
+       }
+
+       serial = port->serial;
+
+       if(ATEN2011_serial_paranoia_check(serial,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid Serial \n");
+               return;
+       }
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+
+       if (ATEN2011_port == NULL)
+               return;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = port->tty;
+
+       if (!port->tty || !port->tty->termios)
+       {
+               dbg ("%s - no tty or termios", __FUNCTION__);
+               return;
+       }
+#endif
+
+       if (!ATEN2011_port->open)
+       {
+               dbg("%s - port not opened", __FUNCTION__);
+               return;
+       }
+
+       DPRINTK("%s\n","setting termios - ");
+
+       cflag = tty->termios->c_cflag;
+
+       if (!cflag)
+       {
+           DPRINTK("%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 */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       ATEN2011_change_port_settings(tty, ATEN2011_port, old_termios);
+#else
+       ATEN2011_change_port_settings(ATEN2011_port, old_termios);
+#endif
+
+       if(!ATEN2011_port->read_urb)
+       {
+               DPRINTK("%s","URB KILLED !!!!!\n");
+               return;
+       }
+
+       if(ATEN2011_port->read_urb->status!=-EINPROGRESS)
+       {
+               ATEN2011_port->read_urb->dev = serial->dev;
+               status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC);
+               if (status)
+               {
+                       DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
+               }
+       }
+       return;
+}
+
+/*
+static void ATEN2011_break_ctl( struct usb_serial_port *port, int break_state )
+{
+        //struct usb_serial *serial = port->serial;
+
+//        if (BSA_USB_CMD(BELKIN_SA_SET_BREAK_REQUEST, break_state ? 1 : 0) < 0)
+  //              err("Set break_ctl %d", break_state);
+}
+*/
+
+
+
+/*****************************************************************************
+ * 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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int get_lsr_info(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int *value)
+#else
+static int get_lsr_info(struct ATENINTL_port *ATEN2011_port, unsigned int *value)
+#endif
+{
+       int count;
+       unsigned int result = 0;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+        count = ATEN2011_chars_in_buffer(tty);
+#else
+        count = ATEN2011_chars_in_buffer(ATEN2011_port->port);
+#endif
+        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.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int get_number_bytes_avail(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, unsigned int *value)
+#else
+static int get_number_bytes_avail(struct ATENINTL_port *ATEN2011_port, unsigned int *value)
+#endif
+{
+       unsigned int result = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       struct tty_struct *tty = ATEN2011_port->port->tty;
+#endif
+
+       if (!tty)
+               return -ENOIOCTLCMD;
+
+       result = tty->read_cnt;
+
+       dbg("%s(%d) = %d", __FUNCTION__,  ATEN2011_port->port->number, result);
+       if (copy_to_user(value, &result, sizeof(int)))
+               return -EFAULT;
+
+       return -ENOIOCTLCMD;
+}
+
+
+/*****************************************************************************
+ * set_modem_info
+ *      function to set modem info
+ *****************************************************************************/
+
+static int set_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int cmd, unsigned int *value)
+{
+       unsigned int mcr ;
+       unsigned int arg;
+       __u16 Data;
+       int status;
+       struct usb_serial_port *port;
+
+       if (ATEN2011_port == NULL)
+               return -1;
+
+
+       port = (struct usb_serial_port*)ATEN2011_port->port;
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return -1;
+       }
+
+       mcr = ATEN2011_port->shadowMCR;
+
+       if (copy_from_user(&arg, value, sizeof(int)))
+               return -EFAULT;
+
+       switch (cmd) {
+               case TIOCMBIS:
+                       if (arg & TIOCM_RTS)
+                               mcr |= MCR_RTS;
+                       if (arg & TIOCM_DTR)
+                               mcr |= MCR_RTS;
+                       if (arg & TIOCM_LOOP)
+                               mcr |= MCR_LOOPBACK;
+                       break;
+
+               case TIOCMBIC:
+                       if (arg & TIOCM_RTS)
+                               mcr &= ~MCR_RTS;
+                       if (arg & TIOCM_DTR)
+                               mcr &= ~MCR_RTS;
+                       if (arg & TIOCM_LOOP)
+                               mcr &= ~MCR_LOOPBACK;
+                       break;
+
+               case TIOCMSET:
+                       /* turn off the RTS and DTR and LOOPBACK
+                        * and then only turn on what was asked to */
+                       mcr &=  ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
+                       mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
+                       mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
+                       mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
+                       break;
+       }
+
+       ATEN2011_port->shadowMCR = mcr;
+
+       Data = ATEN2011_port->shadowMCR;
+       status=0;
+       status = ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+       if(status <0)
+       {
+               DPRINTK("setting MODEM_CONTROL_REGISTER Failed\n");
+               return -1;
+       }
+
+       return 0;
+}
+
+/*****************************************************************************
+ * get_modem_info
+ *      function to get modem info
+ *****************************************************************************/
+
+static int get_modem_info(struct ATENINTL_port *ATEN2011_port, unsigned int *value)
+{
+       unsigned int result = 0;
+       __u16 msr;
+       unsigned int mcr = ATEN2011_port->shadowMCR;
+       int status=0;
+       status=ATEN2011_get_Uart_Reg(ATEN2011_port->port,MODEM_STATUS_REGISTER,&msr);
+       result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
+                 | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
+                 | ((msr & ATEN2011_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
+                 | ((msr & ATEN2011_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
+                 | ((msr & ATEN2011_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
+                 | ((msr & ATEN2011_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 ATENINTL_port *ATEN2011_port, struct serial_struct * retinfo)
+{
+       struct serial_struct tmp;
+
+       if (ATEN2011_port == NULL)
+               return -1;
+
+
+       if (!retinfo)
+               return -EFAULT;
+
+       memset(&tmp, 0, sizeof(tmp));
+
+       tmp.type                = PORT_16550A;
+       tmp.line                = ATEN2011_port->port->serial->minor;
+       if (tmp.line == SERIAL_TTY_NO_MINOR)
+           tmp.line = 0;
+       tmp.port                = ATEN2011_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
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int ATEN2011_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+#else
+static int ATEN2011_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
+#endif
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+       struct usb_serial_port *port = tty->driver_data;
+#else
+       struct tty_struct *tty;
+#endif
+       struct ATENINTL_port *ATEN2011_port;
+       struct async_icount cnow;
+       struct async_icount cprev;
+       struct serial_icounter_struct icount;
+       int ATENret=0;
+       //int retval;
+       //struct tty_ldisc *ld;
+
+       //printk("%s - port %d, cmd = 0x%x\n", __FUNCTION__, port->number, cmd);
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return -1;
+       }
+
+       ATEN2011_port = ATEN2011_get_port_private(port);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = ATEN2011_port->port->tty;
+#endif
+
+       if (ATEN2011_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);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+                       return get_number_bytes_avail(tty, ATEN2011_port, (unsigned int *) arg);
+#else
+                       return get_number_bytes_avail(ATEN2011_port, (unsigned int *) arg);
+#endif
+                       break;
+
+               case TIOCOUTQ:
+                       dbg("%s (%d) TIOCOUTQ", __FUNCTION__,  port->number);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+                       return put_user(ATEN2011_chars_in_buffer(tty),
+                                       (int __user *) arg);
+#else
+                       return put_user(tty->driver->ops->chars_in_buffer ?
+                                       tty->driver->ops->chars_in_buffer(tty) : 0,
+                                       (int __user *) arg);
+#endif
+                       break;
+
+               /*  //2.6.17 block
+               case TCFLSH:
+                       retval = tty_check_change(tty);
+                       if (retval)
+                               return retval;
+
+                       ld = tty_ldisc_ref(tty);
+                       switch (arg) {
+                               case TCIFLUSH:
+                                       if (ld && ld->flush_buffer)
+                                               ld->flush_buffer(tty);
+                                       break;
+                               case TCIOFLUSH:
+                                       if (ld && ld->flush_buffer)
+                                               ld->flush_buffer(tty);
+                                       // fall through
+                               case TCOFLUSH:
+                                       if (tty->driver->flush_buffer)
+                                               tty->driver->flush_buffer(tty);
+                                       break;
+                               default:
+                                       tty_ldisc_deref(ld);
+                                       return -EINVAL;
+                       }
+                       tty_ldisc_deref(ld);
+                       return 0;
+               */
+               case TIOCSERGETLSR:
+                       dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+                       return get_lsr_info(tty, ATEN2011_port, (unsigned int *) arg);
+#else
+                       return get_lsr_info(ATEN2011_port, (unsigned int *) arg);
+#endif
+                       return 0;
+
+               case TIOCMBIS:
+               case TIOCMBIC:
+               case TIOCMSET:
+                       dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,  port->number);
+       //      printk("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,  port->number);
+                       ATENret=set_modem_info(ATEN2011_port, cmd, (unsigned int *) arg);
+       //              printk(" %s: ret:%d\n",__FUNCTION__,ATENret);
+                       return ATENret;
+
+               case TIOCMGET:
+                       dbg("%s (%d) TIOCMGET", __FUNCTION__,  port->number);
+                       return get_modem_info(ATEN2011_port, (unsigned int *) arg);
+
+               case TIOCGSERIAL:
+                       dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
+                       return get_serial_info(ATEN2011_port, (struct serial_struct *) arg);
+
+               case TIOCSSERIAL:
+                       dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
+                       break;
+
+               case TIOCMIWAIT:
+                       dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
+                       cprev = ATEN2011_port->icount;
+                       while (1) {
+                               //interruptible_sleep_on(&ATEN2011_port->delta_msr_wait);
+                               // ATEN2011_port->delta_msr_cond=0;
+                               //wait_event_interruptible(ATEN2011_port->delta_msr_wait,(ATEN2011_port->delta_msr_cond==1));
+
+                               /* see if a signal did it */
+                               if (signal_pending(current))
+                                       return -ERESTARTSYS;
+                               cnow = ATEN2011_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 = ATEN2011_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 *)arg, &icount, sizeof(icount)))
+                               return -EFAULT;
+                       return 0;
+
+               case TIOCEXBAUD:
+                       return 0;
+               default:
+                               break;
+       }
+
+       return -ENOIOCTLCMD;
+}
+
+
+/*****************************************************************************
+ * ATEN2011_send_cmd_write_baud_rate
+ *     this function sends the proper command to change the baud rate of the
+ *     specified port.
+ *****************************************************************************/
+
+static int ATEN2011_send_cmd_write_baud_rate (struct ATENINTL_port *ATEN2011_port, int baudRate)
+{
+       int divisor = 0;
+       int status;
+       __u16 Data;
+       unsigned char number ;
+       __u16 clk_sel_val;
+       struct usb_serial_port *port;
+       int minor;
+
+       if (ATEN2011_port == NULL)
+               return -1;
+
+       port = (struct usb_serial_port*)ATEN2011_port->port;
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return -1;
+       }
+
+       if(ATEN2011_serial_paranoia_check(port->serial,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid Serial \n");
+               return -1;
+       }
+
+
+       DPRINTK("%s","Entering .......... \n");
+
+        minor = ATEN2011_port->port->serial->minor;
+       if (minor == SERIAL_TTY_NO_MINOR)
+           minor = 0;
+       number = ATEN2011_port->port->number - minor;
+
+       dbg("%s - port = %d, baud = %d", __FUNCTION__, ATEN2011_port->port->number, baudRate);
+       //reset clk_uart_sel in spregOffset
+       if(baudRate >115200)
+       {
+               #ifdef HW_flow_control
+               //NOTE: need to see the pther register to modify
+               //setting h/w flow control bit to 1;
+               status=0;
+               //Data = ATEN2011_port->shadowMCR ;
+               Data = 0x2b;
+               ATEN2011_port->shadowMCR=Data;
+               status=ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+               if(status<0)
+               {
+                       DPRINTK("Writing spreg failed in set_serial_baud\n");
+                       return -1;
+               }
+               #endif
+
+       }
+       else
+       {
+               #ifdef HW_flow_control
+               //setting h/w flow control bit to 0;
+               status=0;
+               //Data = ATEN2011_port->shadowMCR ;
+               Data = 0xb;
+               ATEN2011_port->shadowMCR=Data;
+               status=ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+               if(status<0)
+               {
+                       DPRINTK("Writing spreg failed in set_serial_baud\n");
+                       return -1;
+               }
+
+               #endif
+
+
+       }
+
+
+       if(1)//baudRate <= 115200)
+       {
+               clk_sel_val=0x0;
+               Data=0x0;
+               status=0;
+               status = ATEN2011_calc_baud_rate_divisor (baudRate, &divisor,&clk_sel_val);
+               status= ATEN2011_get_reg_sync(port,ATEN2011_port->SpRegOffset,&Data);
+               if(status<0)
+               {
+                       DPRINTK("reading spreg failed in set_serial_baud\n");
+                       return -1;
+               }
+               Data = (Data & 0x8f)|clk_sel_val;
+               status=0;
+               status= ATEN2011_set_reg_sync(port,ATEN2011_port->SpRegOffset,Data);
+               if(status<0)
+               {
+                       DPRINTK("Writing spreg failed in set_serial_baud\n");
+                       return -1;
+               }
+                        /* Calculate the Divisor */
+
+
+               if (status)
+               {
+                       err("%s - bad baud rate", __FUNCTION__);
+                       DPRINTK("%s\n","bad baud rate");
+                       return status;
+               }
+               /* Enable access to divisor latch */
+               Data = ATEN2011_port->shadowLCR | SERIAL_LCR_DLAB;
+               ATEN2011_port->shadowLCR  = Data;
+               ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+
+               /* Write the divisor */
+               Data = LOW8 (divisor);//:  commented to test
+               DPRINTK("set_serial_baud Value to write DLL is %x\n",Data);
+               ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_LSB,Data);
+
+               Data = HIGH8 (divisor); //:  commented to test
+               DPRINTK("set_serial_baud Value to write DLM is %x\n",Data);
+               ATEN2011_set_Uart_Reg(port,DIVISOR_LATCH_MSB,Data);
+
+               /* Disable access to divisor latch */
+               Data = ATEN2011_port->shadowLCR & ~SERIAL_LCR_DLAB;
+               ATEN2011_port->shadowLCR = Data;
+               ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+
+       }
+
+       return status;
+}
+
+
+
+/*****************************************************************************
+ * ATEN2011_calc_baud_rate_divisor
+ *     this function calculates the proper baud rate divisor for the specified
+ *     baud rate.
+ *****************************************************************************/
+static int ATEN2011_calc_baud_rate_divisor (int baudRate, int *divisor,__u16 *clk_sel_val)
+{
+       //int i;
+       //__u16 custom,round1, round;
+
+       dbg("%s - %d", __FUNCTION__, baudRate);
+
+               if(baudRate <=115200)
+               {
+                       *divisor = 115200/baudRate;
+                       *clk_sel_val = 0x0;
+               }
+               if((baudRate > 115200) && (baudRate <= 230400))
+               {
+                       *divisor = 230400/baudRate;
+                       *clk_sel_val=0x10;
+               }
+               else if((baudRate > 230400) && (baudRate <= 403200))
+               {
+                       *divisor = 403200/baudRate;
+                       *clk_sel_val=0x20;
+               }
+               else if((baudRate > 403200) && (baudRate <= 460800))
+               {
+                       *divisor = 460800/baudRate;
+                       *clk_sel_val=0x30;
+               }
+               else if((baudRate > 460800) && (baudRate <= 806400))
+               {
+                       *divisor = 806400/baudRate;
+                       *clk_sel_val=0x40;
+               }
+               else if((baudRate >806400) && (baudRate <= 921600))
+               {
+                       *divisor = 921600/baudRate;
+                       *clk_sel_val=0x50;
+               }
+               else if((baudRate > 921600) && (baudRate <= 1572864))
+               {
+                       *divisor = 1572864/baudRate;
+                       *clk_sel_val=0x60;
+               }
+               else if((baudRate > 1572864) && (baudRate <= 3145728))
+               {
+                       *divisor = 3145728/baudRate;
+                       *clk_sel_val=0x70;
+               }
+       return 0;
+
+       #ifdef NOTATEN2011
+
+       for (i = 0; i < NUM_ENTRIES(ATEN2011_divisor_table); i++)
+       {
+               if ( ATEN2011_divisor_table[i].BaudRate == baudrate )
+               {
+                       *divisor = ATEN2011_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 -1;
+       #endif
+}
+
+
+
+/*****************************************************************************
+ * ATEN2011_change_port_settings
+ *     This routine is called to set the UART on the device to match
+ *      the specified new settings.
+ *****************************************************************************/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios)
+#else
+static void ATEN2011_change_port_settings(struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios)
+#endif
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       struct tty_struct *tty;
+#endif
+       int baud;
+       unsigned cflag;
+       unsigned iflag;
+       __u8 mask = 0xff;
+       __u8 lData;
+       __u8 lParity;
+       __u8 lStop;
+       int status;
+       __u16 Data;
+       struct usb_serial_port *port;
+       struct usb_serial *serial;
+
+       if (ATEN2011_port == NULL)
+               return ;
+
+       port = (struct usb_serial_port *)ATEN2011_port->port;
+
+       if(ATEN2011_port_paranoia_check(port,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid port \n");
+               return ;
+       }
+
+       if(ATEN2011_serial_paranoia_check(port->serial,__FUNCTION__) )
+       {
+               DPRINTK("%s","Invalid Serial \n");
+               return ;
+       }
+
+       serial = port->serial;
+
+       dbg("%s - port %d", __FUNCTION__, ATEN2011_port->port->number);
+
+       if ((!ATEN2011_port->open) && (!ATEN2011_port->openPending))
+       {
+               dbg("%s - port not opened", __FUNCTION__);
+               return;
+       }
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
+       tty = ATEN2011_port->port->tty;
+#endif
+
+       if ((!tty) || (!tty->termios))
+       {
+               dbg("%s - no tty structures", __FUNCTION__);
+               return;
+       }
+
+       DPRINTK("%s","Entering .......... \n");
+
+       lData = LCR_BITS_8;
+       lStop = LCR_STOP_1;
+       lParity = LCR_PAR_NONE;
+
+       cflag = tty->termios->c_cflag;
+       iflag = tty->termios->c_iflag;
+
+       /* Change the number of bits */
+
+//COMMENT1: the below Line"if(cflag & CSIZE)" is added for the errors we get for serial loop data test i.e serial_loopback.pl -v
+       //if(cflag & CSIZE)
+       {
+       switch (cflag & CSIZE)
+       {
+               case CS5:       lData = LCR_BITS_5;
+                               mask = 0x1f;
+                               break;
+
+               case CS6:       lData = LCR_BITS_6;
+                               mask = 0x3f;
+                               break;
+
+               case CS7:       lData = LCR_BITS_7;
+                               mask = 0x7f;
+                               break;
+               default:
+               case CS8:       lData = LCR_BITS_8;
+                               break;
+       }
+       }
+       /* Change the Parity bit */
+       if (cflag & PARENB)
+       {
+               if (cflag & PARODD)
+               {
+                       lParity = LCR_PAR_ODD;
+                       dbg("%s - parity = odd", __FUNCTION__);
+               }
+               else
+               {
+                       lParity = LCR_PAR_EVEN;
+                       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 = LCR_STOP_2;
+               dbg("%s - stop bits = 2", __FUNCTION__);
+       }
+       else
+       {
+               lStop = LCR_STOP_1;
+               dbg("%s - stop bits = 1", __FUNCTION__);
+       }
+
+
+       /* Update the LCR with the correct value */
+       ATEN2011_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
+       ATEN2011_port->shadowLCR |= (lData | lParity | lStop);
+
+       ATEN2011_port->validDataMask = mask;
+       DPRINTK("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is %x\n",ATEN2011_port->shadowLCR);
+       /* Disable Interrupts */
+       Data = 0x00;
+       ATEN2011_set_Uart_Reg(port,INTERRUPT_ENABLE_REGISTER,Data);
+
+
+       Data = 0x00;
+       ATEN2011_set_Uart_Reg(port,FIFO_CONTROL_REGISTER,Data);
+
+       Data = 0xcf;
+       ATEN2011_set_Uart_Reg(port,FIFO_CONTROL_REGISTER,Data);
+
+       /* Send the updated LCR value to the ATEN2011 */
+       Data = ATEN2011_port->shadowLCR;
+
+       ATEN2011_set_Uart_Reg(port,LINE_CONTROL_REGISTER,Data);
+
+
+        Data = 0x00b;
+        ATEN2011_port->shadowMCR = Data;
+       ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+        Data = 0x00b;
+       ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,Data);
+
+       /* set up the MCR register and send it to the ATEN2011 */
+
+       ATEN2011_port->shadowMCR = MCR_MASTER_IE;
+       if (cflag & CBAUD)
+       {
+               ATEN2011_port->shadowMCR |= (MCR_DTR | MCR_RTS);
+       }
+
+
+       if (cflag & CRTSCTS)
+       {
+               ATEN2011_port->shadowMCR |= (MCR_XON_ANY);
+
+
+       }
+       else
+       {
+               ATEN2011_port->shadowMCR &= ~(MCR_XON_ANY);
+       }
+
+
+       Data = ATEN2011_port->shadowMCR;
+       ATEN2011_set_Uart_Reg(port,MODEM_CONTROL_REGISTER,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;
+       }
+
+
+       dbg("%s - baud rate = %d", __FUNCTION__, baud);
+       status = ATEN2011_send_cmd_write_baud_rate (ATEN2011_port, baud);
+
+       /* Enable Interrupts */
+       Data = 0x0c;
+       ATEN2011_set_Uart_Reg(port,INTERRUPT_ENABLE_REGISTER,Data);
+
+       if(ATEN2011_port->read_urb->status!=-EINPROGRESS)
+       {
+               ATEN2011_port->read_urb->dev = serial->dev;
+
+               status = usb_submit_urb(ATEN2011_port->read_urb, GFP_ATOMIC);
+
+               if (status)
+               {
+                       DPRINTK(" usb_submit_urb(read bulk) failed, status = %d", status);
+               }
+       }
+       //wake_up(&ATEN2011_port->delta_msr_wait);
+       //ATEN2011_port->delta_msr_cond=1;
+       DPRINTK("ATEN2011_change_port_settings ATEN2011_port->shadowLCR is End %x\n",ATEN2011_port->shadowLCR);
+
+       return;
+}
+
+
+static int ATEN2011_calc_num_ports(struct usb_serial *serial)
+{
+
+       __u16 Data=0x00;
+        int ret =0;
+       int ATEN2011_2or4ports;
+        ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),\
+        ATEN_RDREQ,ATEN_RD_RTYPE,0,GPIO_REGISTER,&Data,VENDOR_READ_LENGTH,ATEN_WDR_TIMEOUT);
+
+       //printk("ATEN2011_calc_num_ports GPIO is %x\n",Data);
+
+
+/* ghostgum: here is where the problem appears to bet */
+/* Which of the following are needed? */
+/* Greg used the serial->type->num_ports=2 */
+/* But the code in the ATEN2011_open relies on serial->num_ports=2 */
+        if((Data&0x01)==0)
+        {
+                ATEN2011_2or4ports=2;
+                serial->type->num_ports=2;
+                serial->num_ports=2;
+        }
+        //else if(serial->interface->cur_altsetting->desc.bNumEndpoints == 9)
+        else
+        {
+                ATEN2011_2or4ports =4;
+                serial->type->num_ports=4;
+                serial->num_ports=4;
+
+        }
+
+       return ATEN2011_2or4ports;
+}
+
+
+/****************************************************************************
+ * ATEN2011_startup
+ ****************************************************************************/
+
+static int ATEN2011_startup (struct usb_serial *serial)
+{
+       struct ATENINTL_serial *ATEN2011_serial;
+       struct ATENINTL_port *ATEN2011_port;
+       struct usb_device *dev;
+       int i,status;
+       int minor;
+
+       __u16 Data;
+       DPRINTK("%s \n"," ATEN2011_startup :entering..........");
+
+       if(!serial)
+       {
+               DPRINTK("%s\n","Invalid Handler");
+               return -1;
+       }
+
+       dev = serial->dev;
+
+       DPRINTK("%s\n","Entering...");
+
+       /* create our private serial structure */
+       ATEN2011_serial = kzalloc (sizeof(struct ATENINTL_serial), GFP_KERNEL);
+       if (ATEN2011_serial == NULL)
+       {
+               err("%s - Out of memory", __FUNCTION__);
+               return -ENOMEM;
+       }
+
+       /* resetting the private structure field values to zero */
+       memset (ATEN2011_serial, 0, sizeof(struct ATENINTL_serial));
+
+       ATEN2011_serial->serial = serial;
+       //initilize status polling flag to FALSE
+       ATEN2011_serial->status_polling_started = FALSE;
+
+       ATEN2011_set_serial_private(serial,ATEN2011_serial);
+       ATEN2011_serial->ATEN2011_spectrum_2or4ports = ATEN2011_calc_num_ports(serial);
+       /* we set up the pointers to the endpoints in the ATEN2011_open *
+        * function, as the structures aren't created yet.             */
+
+       /* set up port private structures */
+       for (i = 0; i < serial->num_ports; ++i)
+       {
+               ATEN2011_port = kmalloc(sizeof(struct ATENINTL_port), GFP_KERNEL);
+               if (ATEN2011_port == NULL)
+               {
+                       err("%s - Out of memory", __FUNCTION__);
+                       ATEN2011_set_serial_private(serial,NULL);
+                       kfree(ATEN2011_serial);
+                       return -ENOMEM;
+               }
+               memset(ATEN2011_port, 0, sizeof(struct ATENINTL_port));
+
+
+       /* 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;
+
+
+               ATEN2011_port->port = serial->port[i];
+//
+                       ATEN2011_set_port_private(serial->port[i],ATEN2011_port);
+
+
+               minor = serial->port[i] ->serial->minor;
+               if (minor == SERIAL_TTY_NO_MINOR)
+                   minor = 0;
+               ATEN2011_port->port_num=((serial->port[i]->number -  minor)+1);
+
+               ATEN2011_port->AppNum = (((__u16)serial->port[i]->number - \
+                               (__u16)(minor))+1)<<8;
+
+               if(ATEN2011_port->port_num ==1)
+               {
+                       ATEN2011_port->SpRegOffset =0x0;
+                       ATEN2011_port->ControlRegOffset =0x1;
+                       ATEN2011_port->DcrRegOffset =0x4 ;
+                       //ATEN2011_port->ClkSelectRegOffset =  ;
+               }
+               else if((ATEN2011_port->port_num ==2)&&(ATEN2011_serial->ATEN2011_spectrum_2or4ports ==4))
+               {
+                       ATEN2011_port->SpRegOffset =0x8;
+                       ATEN2011_port->ControlRegOffset =0x9;
+                       ATEN2011_port->DcrRegOffset =0x16;
+                       //ATEN2011_port->ClkSelectRegOffset =  ;
+               }
+               else if((ATEN2011_port->port_num ==2)&&(ATEN2011_serial->ATEN2011_spectrum_2or4ports ==2))
+               {
+                       ATEN2011_port->SpRegOffset =0xa;
+                       ATEN2011_port->ControlRegOffset =0xb;
+                       ATEN2011_port->DcrRegOffset =0x19;
+                       //ATEN2011_port->ClkSelectRegOffset =  ;
+               }
+               else if((ATEN2011_port->port_num ==3)&&(ATEN2011_serial->ATEN2011_spectrum_2or4ports ==4))
+               {
+                       ATEN2011_port->SpRegOffset =0xa;
+                       ATEN2011_port->ControlRegOffset =0xb;
+                       ATEN2011_port->DcrRegOffset =0x19;
+                       //ATEN2011_port->ClkSelectRegOffset =  ;
+               }
+               else if((ATEN2011_port->port_num ==4)&&(ATEN2011_serial->ATEN2011_spectrum_2or4ports ==4))
+               {
+                       ATEN2011_port->SpRegOffset =0xc;
+                       ATEN2011_port->ControlRegOffset =0xd;
+                       ATEN2011_port->DcrRegOffset =0x1c ;
+                       //ATEN2011_port->ClkSelectRegOffset =  ;
+               }
+               ATEN2011_Dump_serial_port(ATEN2011_port);
+
+               ATEN2011_set_port_private(serial->port[i],ATEN2011_port);
+
+
+               //enable rx_disable bit in control register
+
+               status=ATEN2011_get_reg_sync(serial->port[i],ATEN2011_port->ControlRegOffset,&Data);
+               if(status<0) {
+                       DPRINTK("Reading ControlReg failed status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("ControlReg Reading success val is %x, status%d\n",Data,status);
+               Data |= 0x08;//setting driver done bit
+               Data |= 0x04;//sp1_bit to have cts change reflect in modem status reg
+
+               //Data |= 0x20; //rx_disable bit
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],ATEN2011_port->ControlRegOffset,Data);
+               if(status<0) {
+                       DPRINTK("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("ControlReg Writing success(rx_disable) status%d\n",status);
+
+               //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
+               Data = 0x01;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],(__u16)(ATEN2011_port->DcrRegOffset+0),Data);
+               if(status<0) {
+                       DPRINTK("Writing DCR0 failed status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("DCR0 Writing success status%d\n",status);
+
+               Data = 0x05;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],(__u16)(ATEN2011_port->DcrRegOffset+1),Data);
+               if(status<0) {
+                       DPRINTK("Writing DCR1 failed status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("DCR1 Writing success status%d\n",status);
+
+               Data = 0x24;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],(__u16)(ATEN2011_port->DcrRegOffset+2),Data);
+               if(status<0) {
+                       DPRINTK("Writing DCR2 failed status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("DCR2 Writing success status%d\n",status);
+
+               // write values in clkstart0x0 and clkmulti 0x20
+               Data = 0x0;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],CLK_START_VALUE_REGISTER,Data);
+               if(status<0) {
+                       DPRINTK("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
+                       break;
+               }
+               else DPRINTK("CLK_START_VALUE_REGISTER Writing success status%d\n",status);
+
+
+               Data = 0x20;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],CLK_MULTI_REGISTER,Data);
+               if(status<0) {
+                        DPRINTK("Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
+                        break;
+                }
+               else DPRINTK("CLK_MULTI_REGISTER Writing success status%d\n",status);
+
+
+               //write value 0x0 to scratchpad register
+               /*
+               if(RS485mode==0)
+                       Data = 0xC0;
+               else
+                       Data = 0x00;
+               status=0;
+               status=ATEN2011_set_Uart_Reg(serial->port[i],SCRATCH_PAD_REGISTER,Data);
+               if(status<0) {
+                       DPRINTK("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
+                       break;
+                }
+               else DPRINTK("SCRATCH_PAD_REGISTER Writing success status%d\n",status);
+               */
+
+       /*
+               //Threshold Registers
+               if(ATEN2011_serial->ATEN2011_spectrum_2or4ports==4)
+               {
+                       Data = 0x00;
+                       status=0;
+                       status=ATEN2011_set_reg_sync(serial->port[i],\
+                                       (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt),Data);
+                       DPRINTK("THRESHOLD_VAL offset is%x\n", (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt));
+                       if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+                       }
+                       else DPRINTK("THRESHOLD_VAL Writing success status%d\n",status);
+                       ATEN2011_Thr_cnt++;
+
+                       Data = 0x01;
+                       status=0;
+                       status=ATEN2011_set_reg_sync(serial->port[i],\
+                       (__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt),Data);
+               DPRINTK("THRESHOLD_VAL offsetis%x\n",(__u16)(THRESHOLD_VAL_SP1_1+(__u16)ATEN2011_Thr_cnt));
+                       if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+                       }
+                       else DPRINTK("THRESHOLD_VAL Writing success status%d\n",status);
+                       ATEN2011_Thr_cnt++;
+               }
+
+               else
+               {
+
+                       if(ATEN2011_port->port_num==1)
+                       {
+                               Data = 0x00;
+                               status=0;
+                               status=ATEN2011_set_reg_sync(serial->port[i],\
+                                       0x3f,Data);
+                               DPRINTK("THRESHOLD_VAL offset is 0x3f\n");
+                               if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+                               }
+                               Data = 0x01;
+                               status=0;
+                               status=ATEN2011_set_reg_sync(serial->port[i],\
+                                       0x40,Data);
+                               DPRINTK("THRESHOLD_VAL offset is 0x40\n");
+                               if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+
+                               }
+                       }
+                       else
+                        {
+                               Data = 0x00;
+                               status=0;
+                               status=ATEN2011_set_reg_sync(serial->port[i],\
+                                       0x43,Data);
+                               DPRINTK("THRESHOLD_VAL offset is 0x43\n");
+                               if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+                               }
+                               Data = 0x01;
+                               status=0;
+                               status=ATEN2011_set_reg_sync(serial->port[i],\
+                                       0x44,Data);
+                               DPRINTK("THRESHOLD_VAL offset is 0x44\n");
+                               if(status<0) {
+                               DPRINTK("Writing THRESHOLD_VAL failed status-0x%x\n",status);
+                               break;
+
+                               }
+
+
+                       }
+
+               }
+               */
+               //Zero Length flag register
+               if((ATEN2011_port->port_num != 1)&&(ATEN2011_serial->ATEN2011_spectrum_2or4ports==2 ))
+               {
+
+               Data = 0xff;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[i],\
+                       (__u16)(ZLP_REG1+((__u16)ATEN2011_port->port_num)),Data);
+               DPRINTK("ZLIP offset%x\n",(__u16)(ZLP_REG1+((__u16)ATEN2011_port->port_num)));
+               if(status<0) {
+                        DPRINTK("Writing ZLP_REG%d failed status-0x%x\n",i+2,status);
+                        break;
+                }
+               else DPRINTK("ZLP_REG%d Writing success status%d\n",i+2,status);
+               }
+               else
+               {
+               Data = 0xff;
+                status=0;
+                status=ATEN2011_set_reg_sync(serial->port[i],\
+                        (__u16)(ZLP_REG1+((__u16)ATEN2011_port->port_num)-0x1),Data);
+                DPRINTK("ZLIP offset%x\n",(__u16)(ZLP_REG1+((__u16)ATEN2011_port->port_num)-0x1));
+                if(status<0) {
+                        DPRINTK("Writing ZLP_REG%d failed status-0x%x\n",i+1,status);
+                        break;
+                }
+                else DPRINTK("ZLP_REG%d Writing success status%d\n",i+1,status);
+
+
+               }
+       ATEN2011_port->control_urb = usb_alloc_urb(0,GFP_ATOMIC);
+       ATEN2011_port->ctrl_buf = kmalloc(16,GFP_KERNEL);
+
+
+       }
+
+
+               ATEN2011_Thr_cnt=0;
+               //Zero Length flag enable
+               Data = 0x0f;
+               status=0;
+               status=ATEN2011_set_reg_sync(serial->port[0],ZLP_REG5,Data);
+               if(status<0) {
+                              DPRINTK("Writing ZLP_REG5 failed status-0x%x\n",status);
+                              return -1;
+                }
+               else DPRINTK("ZLP_REG5 Writing success status%d\n",status);
+
+       /* setting configuration feature to one */
+       usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), (__u8)0x03, 0x00,0x01,0x00, 0x00, 0x00, 5*HZ);
+       ATEN2011_Thr_cnt =0 ;
+       return 0;
+}
+
+
+
+/****************************************************************************
+ * ATEN2011_shutdown
+ *     This function is called whenever the device is removed from the usb bus.
+ ****************************************************************************/
+
+static void ATEN2011_shutdown (struct usb_serial *serial)
+{
+       int i;
+       struct ATENINTL_port *ATEN2011_port;
+       DPRINTK("%s \n"," shutdown :entering..........");
+
+/* MATRIX  */
+       //ThreadState = 1;
+/* MATRIX  */
+
+       if(!serial)
+       {
+               DPRINTK("%s","Invalid Handler \n");
+               return;
+       }
+
+       /*      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)
+       {
+               ATEN2011_port = ATEN2011_get_port_private(serial->port[i]);
+               kfree(ATEN2011_port->ctrl_buf);
+               usb_kill_urb(ATEN2011_port->control_urb);
+               kfree(ATEN2011_port);
+               ATEN2011_set_port_private(serial->port[i],NULL);
+       }
+
+       /* free private structure allocated for serial device */
+
+       kfree(ATEN2011_get_serial_private(serial));
+       ATEN2011_set_serial_private(serial,NULL);
+
+        DPRINTK("%s\n","Thank u :: ");
+
+}
+
+
+/* Inline functions to check the sanity of a pointer that is passed to us */
+static int ATEN2011_serial_paranoia_check (struct usb_serial *serial, const char *function)
+{
+        if (!serial) {
+                dbg("%s - serial == NULL", function);
+                return -1;
+        }
+//      if (serial->magic != USB_SERIAL_MAGIC) {
+//              dbg("%s - bad magic number for serial", function);
+//              return -1;
+//      }
+        if (!serial->type) {
+                dbg("%s - serial->type == NULL!", function);
+                return -1;
+        }
+
+        return 0;
+}
+static int ATEN2011_port_paranoia_check (struct usb_serial_port *port, const char *function)
+{
+        if (!port) {
+                dbg("%s - port == NULL", function);
+                return -1;
+        }
+//      if (port->magic != USB_SERIAL_PORT_MAGIC) {
+//              dbg("%s - bad magic number for port", function);
+//              return -1;
+//      }
+        if (!port->serial) {
+                dbg("%s - port->serial == NULL", function);
+                return -1;
+        }
+
+        return 0;
+}
+static struct usb_serial* ATEN2011_get_usb_serial (struct usb_serial_port *port, const char *function) {
+        /* if no port was specified, or it fails a paranoia check */
+        if (!port ||
+                ATEN2011_port_paranoia_check (port, function) ||
+                ATEN2011_serial_paranoia_check (port->serial, function)) {
+     /* then say that we don't have a valid usb_serial thing, which will                  * end up genrating -ENODEV return values */
+                return NULL;
+        }
+
+        return port->serial;
+}
+
+
+
+/****************************************************************************
+ * ATENINTL2011_init
+ *     This is called by the module subsystem, or on startup to initialize us
+ ****************************************************************************/
+ int __init ATENINTL2011_init(void)
+{
+       int retval;
+
+       DPRINTK("%s \n"," ATEN2011_init :entering..........");
+
+        /* Register with the usb serial */
+       retval = usb_serial_register (&ATENINTL2011_4port_device);
+
+       if(retval)
+               goto failed_port_device_register;
+
+/*     info(DRIVER_DESC " " DRIVER_VERSION); */
+       printk(KERN_INFO KBUILD_MODNAME ":"
+               DRIVER_DESC " " DRIVER_VERSION "\n");
+
+
+       /* Register with the usb */
+       retval = usb_register(&io_driver);
+
+       if (retval)
+               goto failed_usb_register;
+
+       if(retval == 0)
+       {
+               DPRINTK("%s\n","Leaving...");
+               return 0;
+       }
+
+
+failed_usb_register:
+       usb_serial_deregister(&ATENINTL2011_4port_device);
+
+failed_port_device_register:
+
+       return retval;
+}
+
+/****************************************************************************
+ * ATENINTL2011_exit
+ *     Called when the driver is about to be unloaded.
+ ****************************************************************************/
+void __exit ATENINTL2011_exit (void)
+{
+
+       DPRINTK("%s \n"," ATEN2011_exit :entering..........");
+
+       usb_deregister (&io_driver);
+
+       usb_serial_deregister (&ATENINTL2011_4port_device);
+
+       DPRINTK("%s\n","End...");
+}
+
+module_init(ATENINTL2011_init);
+module_exit(ATENINTL2011_exit);
+
+/* Module information */
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
diff --git a/drivers/staging/uc2322/aten2011.h b/drivers/staging/uc2322/aten2011.h
new file mode 100644 (file)
index 0000000..dc7fb7b
--- /dev/null
@@ -0,0 +1,383 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#if !defined(_ATEN_CIP_H_)
+#define        _ATEN_CIP_H_
+
+
+#define MAX_RS232_PORTS                2       /* Max # of RS-232 ports per device */
+
+#include <linux/version.h>
+
+/*
+ *  All typedef goes here
+ */
+
+
+/* typedefs that the insideout headers need */
+
+#ifndef TRUE
+       #define TRUE            (1)
+#endif
+
+#ifndef FALSE
+       #define FALSE           (0)
+#endif
+
+#ifndef LOW8
+       #define LOW8(val)       ((unsigned char)(val & 0xff))
+#endif
+
+#ifndef HIGH8
+       #define HIGH8(val)      ((unsigned char)((val & 0xff00) >> 8))
+#endif
+
+#ifndef NUM_ENTRIES
+       #define NUM_ENTRIES(x)  (sizeof(x)/sizeof((x)[0]))
+#endif
+
+#define MAX_SERIALNUMBER_LEN   12
+
+/* The following table is used to map the USBx port number to
+ * the device serial number (or physical USB path), */
+
+#define MAX_ATENPORTS  2
+#define MAX_NAME_LEN   64
+
+#define RAID_REG1      0x30
+#define RAID_REG2      0x31
+
+#define ZLP_REG1       0x3A      //Zero_Flag_Reg1    58
+#define ZLP_REG2       0x3B      //Zero_Flag_Reg2    59
+#define ZLP_REG3       0x3C      //Zero_Flag_Reg3    60
+#define ZLP_REG4       0x3D      //Zero_Flag_Reg4    61
+#define ZLP_REG5       0x3E      //Zero_Flag_Reg5    62
+
+#define THRESHOLD_VAL_SP1_1     0x3F
+#define THRESHOLD_VAL_SP1_2     0x40
+#define THRESHOLD_VAL_SP2_1     0x41
+#define THRESHOLD_VAL_SP2_2     0x42
+
+#define THRESHOLD_VAL_SP3_1     0x43
+#define THRESHOLD_VAL_SP3_2     0x44
+#define THRESHOLD_VAL_SP4_1     0x45
+#define THRESHOLD_VAL_SP4_2     0x46
+
+
+/* For higher baud Rates use TIOCEXBAUD */
+#define TIOCEXBAUD     0x5462
+
+#define BAUD_1152      0       /* 115200bps  * 1       */
+#define BAUD_2304      1       /* 230400bps  * 2       */
+#define BAUD_4032      2       /* 403200bps  * 3.5     */
+#define BAUD_4608      3       /* 460800bps  * 4       */
+#define BAUD_8064      4       /* 806400bps  * 7       */
+#define BAUD_9216      5       /* 921600bps  * 8       */
+
+#define CHASE_TIMEOUT          (5*HZ)          /* 5 seconds */
+#define OPEN_TIMEOUT           (5*HZ)          /* 5 seconds */
+#define COMMAND_TIMEOUT                (5*HZ)          /* 5 seconds */
+
+#ifndef SERIAL_MAGIC
+       #define SERIAL_MAGIC    0x6702
+#endif
+
+#define PORT_MAGIC             0x7301
+
+
+
+/* vendor id and device id defines */
+
+#define USB_VENDOR_ID_ATENINTL         0x0557
+#define ATENINTL_DEVICE_ID_2011                0x2011
+#define ATENINTL_DEVICE_ID_7820                0x7820
+
+/* Product information read from the ATENINTL. Provided for later upgrade */
+
+/* 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
+
+/*
+ *  Emulation of the bit mask on the LINE STATUS REGISTER.
+ */
+#define SERIAL_LSR_DR       0x0001
+#define SERIAL_LSR_OE       0x0002
+#define SERIAL_LSR_PE       0x0004
+#define SERIAL_LSR_FE       0x0008
+#define SERIAL_LSR_BI       0x0010
+#define SERIAL_LSR_THRE     0x0020
+#define SERIAL_LSR_TEMT     0x0040
+#define SERIAL_LSR_FIFOERR  0x0080
+
+//MSR bit defines(place holders)
+#define ATEN_MSR_CTS         0x01
+#define ATEN_MSR_DSR         0x02
+#define ATEN_MSR_RI          0x04
+#define ATEN_MSR_CD          0x08
+#define ATEN_MSR_DELTA_CTS   0x10
+#define ATEN_MSR_DELTA_DSR   0x20
+#define ATEN_MSR_DELTA_RI    0x40
+#define ATEN_MSR_DELTA_CD    0x80
+
+// Serial Port register Address
+#define RECEIVE_BUFFER_REGISTER    ((__u16)(0x00))
+#define TRANSMIT_HOLDING_REGISTER  ((__u16)(0x00))
+#define INTERRUPT_ENABLE_REGISTER  ((__u16)(0x01))
+#define INTERRUPT_IDENT_REGISTER   ((__u16)(0x02))
+#define FIFO_CONTROL_REGISTER      ((__u16)(0x02))
+#define LINE_CONTROL_REGISTER      ((__u16)(0x03))
+#define MODEM_CONTROL_REGISTER     ((__u16)(0x04))
+#define LINE_STATUS_REGISTER       ((__u16)(0x05))
+#define MODEM_STATUS_REGISTER      ((__u16)(0x06))
+#define SCRATCH_PAD_REGISTER       ((__u16)(0x07))
+#define DIVISOR_LATCH_LSB          ((__u16)(0x00))
+#define DIVISOR_LATCH_MSB          ((__u16)(0x01))
+
+#define SP_REGISTER_BASE           ((__u16)(0x08))
+#define CONTROL_REGISTER_BASE      ((__u16)(0x09))
+#define DCR_REGISTER_BASE          ((__u16)(0x16))
+
+#define SP1_REGISTER               ((__u16)(0x00))
+#define CONTROL1_REGISTER          ((__u16)(0x01))
+#define CLK_MULTI_REGISTER         ((__u16)(0x02))
+#define CLK_START_VALUE_REGISTER   ((__u16)(0x03))
+#define DCR1_REGISTER              ((__u16)(0x04))
+#define GPIO_REGISTER              ((__u16)(0x07))
+
+#define CLOCK_SELECT_REG1          ((__u16)(0x13))
+#define CLOCK_SELECT_REG2          ((__u16)(0x14))
+
+#define SERIAL_LCR_DLAB           ((__u16)(0x0080))
+
+/*
+ * URB POOL related defines
+ */
+#define NUM_URBS                        16     /* URB Count */
+#define URB_TRANSFER_BUFFER_SIZE        32     /* URB Size  */
+
+struct ATENINTL_product_info
+{
+       __u16   ProductId;              /* Product Identifier */
+       __u8    NumPorts;               /* Number of ports on ATENINTL */
+       __u8    ProdInfoVer;            /* What version of structure is this? */
+
+       __u32   IsServer        :1;     /* Set if Server */
+       __u32   IsRS232         :1;     /* Set if RS-232 ports exist */
+       __u32   IsRS422         :1;     /* Set if RS-422 ports exist */
+       __u32   IsRS485         :1;     /* Set if RS-485 ports exist */
+       __u32   IsReserved      :28;    /* Reserved for later expansion */
+
+       __u8    CpuRev;                 /* CPU revision level (chg only if s/w visible) */
+       __u8    BoardRev;               /* PCB revision level (chg only if s/w visible) */
+
+       __u8    ManufactureDescDate[3]; /* MM/DD/YY when descriptor template was compiled */
+       __u8    Unused1[1];             /* Available */
+};
+
+// different USB-serial Adapter's ID's table
+static struct usb_device_id ATENINTL_port_id_table [] = {
+       { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_2011) },
+       { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_7820) },
+       { } /* terminating entry */
+};
+
+static __devinitdata struct usb_device_id id_table_combined [] = {
+       { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_2011) },
+       { USB_DEVICE(USB_VENDOR_ID_ATENINTL,ATENINTL_DEVICE_ID_7820) },
+       { } /* terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table_combined);
+
+/* This structure holds all of the local port information */
+struct ATENINTL_port
+{
+       int             port_num;          /*Actual port number in the device(1,2,etc)*/
+       __u8            bulk_out_endpoint;      /* the bulk out endpoint handle */
+       unsigned char   *bulk_out_buffer;       /* buffer used for the bulk out endpoint */
+       struct urb      *write_urb;             /* write URB for this port */
+       __u8            bulk_in_endpoint;       /* the bulk in endpoint handle */
+       unsigned char   *bulk_in_buffer;        /* the buffer we use for the bulk in endpoint */
+       struct urb      *read_urb;              /* read URB for this 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 ATENINTL */
+       __u8            shadowXoffChar;         /* last value set as XOFF char in ATENINTL */
+       __u8            validDataMask;
+       __u32           baudRate;
+       char            open;
+       char            openPending;
+       char            commandPending;
+       char            closePending;
+       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 */
+        int                     delta_msr_cond;
+       struct async_icount     icount;
+       struct usb_serial_port  *port;                  /* loop back to the owner of this object */
+       /*Offsets*/
+       __u16           AppNum;
+       __u8            SpRegOffset;
+       __u8            ControlRegOffset;
+       __u8            DcrRegOffset;
+       __u8            ClkSelectRegOffset;
+       //for processing control URBS in interrupt context
+       struct urb      *control_urb;
+       // __le16 rx_creg;
+        char           *ctrl_buf;
+       int             MsrLsr;
+
+       struct urb      *write_urb_pool[NUM_URBS];
+       /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */
+        struct ktermios tmp_termios;        /* stores the old termios settings */
+       spinlock_t      lock;                   /* private lock */
+};
+
+
+/* This structure holds all of the individual serial device information */
+struct ATENINTL_serial
+{
+       char            name[MAX_NAME_LEN+1];           /* string name of this device */
+       struct  ATENINTL_product_info   product_info;   /* Product Info */
+       __u8            interrupt_in_endpoint;          /* the interrupt endpoint handle */
+       unsigned char  *interrupt_in_buffer;            /* the buffer we use for the interrupt endpoint */
+       struct urb *    interrupt_read_urb;     /* our interrupt urb */
+       __u8            bulk_in_endpoint;       /* the bulk in endpoint handle */
+       unsigned char  *bulk_in_buffer;         /* the buffer we use for the bulk in endpoint */
+       struct urb      *read_urb;              /* our bulk read urb */
+       __u8            bulk_out_endpoint;      /* the bulk out endpoint handle */
+       __s16    rxBytesAvail;  /* the number of bytes that we need to read from this device */
+       __u8            rxPort;         /* the port that we are currently receiving data for */
+       __u8            rxStatusCode;           /* the receive status code */
+       __u8            rxStatusParam;          /* the receive status paramater */
+       __s16           rxBytesRemaining;       /* the number of port bytes left to read */
+       struct usb_serial       *serial;        /* loop back to the owner of this object */
+       int     ATEN2011_spectrum_2or4ports;    //this says the number of ports in the device
+       // Indicates about the no.of opened ports of an individual USB-serial adapater.
+       unsigned int    NoOfOpenPorts;
+       // a flag for Status endpoint polling
+       unsigned char   status_polling_started;
+};
+
+/* baud rate information */
+struct ATEN2011_divisor_table_entry
+{
+       __u32  BaudRate;
+       __u16  Divisor;
+};
+
+/* Define table of divisors for ATENINTL 2011 hardware    *
+ * These assume a 3.6864MHz crystal, the standard /16, and *
+ * MCR.7 = 0.                                             */
+#ifdef NOTATEN2011
+static struct ATEN2011_divisor_table_entry ATEN2011_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},
+};
+#endif
+
+/* local function prototypes */
+/* function prototypes for all URB callbacks */
+static void ATEN2011_interrupt_callback(struct urb *urb);
+static void ATEN2011_bulk_in_callback(struct urb *urb);
+static void ATEN2011_bulk_out_data_callback(struct urb *urb);
+static void ATEN2011_control_callback(struct urb *urb);
+static int ATEN2011_get_reg(struct ATENINTL_port *ATEN,__u16 Wval, __u16 reg, __u16 * val);
+int handle_newMsr(struct ATENINTL_port *port,__u8 newMsr);
+int handle_newLsr(struct ATENINTL_port *port,__u8 newLsr);
+/* function prototypes for the usbserial callbacks */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static int  ATEN2011_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp);
+static void ATEN2011_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp);
+static int ATEN2011_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count);
+static int  ATEN2011_write_room(struct tty_struct *tty);
+static int  ATEN2011_chars_in_buffer(struct tty_struct *tty);
+static void ATEN2011_throttle(struct tty_struct *tty);
+static void ATEN2011_unthrottle(struct tty_struct *tty);
+static void ATEN2011_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios);
+static int ATEN2011_tiocmset(struct tty_struct *tty, struct file *file,
+                               unsigned int set, unsigned int clear);
+static int ATEN2011_tiocmget(struct tty_struct *tty, struct file *file);
+static int  ATEN2011_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
+static void ATEN2011_break(struct tty_struct *tty, int break_state);
+#else
+static int  ATEN2011_open(struct usb_serial_port *port, struct file *filp);
+static void ATEN2011_close(struct usb_serial_port *port, struct file *filp);
+static int ATEN2011_write(struct usb_serial_port *port, const unsigned char *data, int count);
+static int  ATEN2011_write_room(struct usb_serial_port *port);
+static int  ATEN2011_chars_in_buffer(struct usb_serial_port *port);
+static void ATEN2011_throttle(struct usb_serial_port *port);
+static void ATEN2011_unthrottle(struct usb_serial_port *port);
+static void ATEN2011_set_termios       (struct usb_serial_port *port, struct ktermios *old_termios);
+static int ATEN2011_tiocmset(struct usb_serial_port *port, struct file *file,
+                               unsigned int set, unsigned int clear);
+static int ATEN2011_tiocmget(struct usb_serial_port *port, struct file *file);
+static int  ATEN2011_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
+static void ATEN2011_break(struct usb_serial_port *port, int break_state);
+#endif
+
+//static void ATEN2011_break_ctl(struct usb_serial_port *port, int break_state );
+
+static int  ATEN2011_startup(struct usb_serial *serial);
+static void ATEN2011_shutdown(struct usb_serial *serial);
+//static int ATEN2011_serial_probe(struct usb_serial *serial, const struct usb_device_id *id);
+static int ATEN2011_calc_num_ports(struct usb_serial *serial);
+
+/* function prototypes for all of our local functions */
+static int  ATEN2011_calc_baud_rate_divisor(int baudRate, int *divisor,__u16 *clk_sel_val);
+static int  ATEN2011_send_cmd_write_baud_rate(struct ATENINTL_port *ATEN2011_port, int baudRate);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
+static void ATEN2011_change_port_settings(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios);
+static void ATEN2011_block_until_chase_response(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port);
+static void ATEN2011_block_until_tx_empty(struct tty_struct *tty, struct ATENINTL_port *ATEN2011_port);
+#else
+static void ATEN2011_change_port_settings(struct ATENINTL_port *ATEN2011_port, struct ktermios *old_termios);
+static void ATEN2011_block_until_chase_response(struct ATENINTL_port *ATEN2011_port);
+static void ATEN2011_block_until_tx_empty(struct ATENINTL_port *ATEN2011_port);
+#endif
+
+int __init ATENINTL2011_init(void);
+void __exit ATENINTL2011_exit(void);
+
+#endif
diff --git a/drivers/staging/uc2322/aten2011_16C50.h b/drivers/staging/uc2322/aten2011_16C50.h
new file mode 100644 (file)
index 0000000..c311741
--- /dev/null
@@ -0,0 +1,58 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#if !defined(_16C50_H)
+#define        _16C50_H
+
+/*************************************
+ * Bit definitions for each register *
+ *************************************/
+#define LCR_BITS_5             0x00    /* 5 bits/char */
+#define LCR_BITS_6             0x01    /* 6 bits/char */
+#define LCR_BITS_7             0x02    /* 7 bits/char */
+#define LCR_BITS_8             0x03    /* 8 bits/char */
+#define LCR_BITS_MASK          0x03    /* Mask for bits/char field */
+
+#define LCR_STOP_1             0x00    /* 1 stop bit */
+#define LCR_STOP_1_5           0x04    /* 1.5 stop bits (if 5   bits/char) */
+#define LCR_STOP_2             0x04    /* 2 stop bits   (if 6-8 bits/char) */
+#define LCR_STOP_MASK          0x04    /* Mask for stop bits field */
+
+#define LCR_PAR_NONE           0x00    /* No parity */
+#define LCR_PAR_ODD            0x08    /* Odd parity */
+#define LCR_PAR_EVEN           0x18    /* Even parity */
+#define LCR_PAR_MARK           0x28    /* Force parity bit to 1 */
+#define LCR_PAR_SPACE          0x38    /* Force parity bit to 0 */
+#define LCR_PAR_MASK           0x38    /* Mask for parity field */
+
+#define LCR_SET_BREAK          0x40    /* Set Break condition */
+#define LCR_DL_ENABLE          0x80    /* Enable access to divisor latch */
+
+#define MCR_DTR                        0x01    /* Assert DTR */
+#define MCR_RTS                        0x02    /* Assert RTS */
+#define MCR_OUT1               0x04    /* Loopback only: Sets state of RI */
+#define MCR_MASTER_IE          0x08    /* Enable interrupt outputs */
+#define MCR_LOOPBACK           0x10    /* Set internal (digital) loopback mode */
+#define MCR_XON_ANY            0x20    /* Enable any char to exit XOFF mode */
+
+#define ATEN2011_MSR_CTS       0x10    /* Current state of CTS */
+#define ATEN2011_MSR_DSR       0x20    /* Current state of DSR */
+#define ATEN2011_MSR_RI                0x40    /* Current state of RI */
+#define ATEN2011_MSR_CD                0x80    /* Current state of CD */
+
+#endif /* if !defined(_16C50_H) */
+