ClabureDB: Classified Bug-Reports Database

   /*
    * USB FTDI SIO driver
    *
    *        Copyright (C) 1999 - 2001
    *            Greg Kroah-Hartman (greg@kroah.com)
    *          Bill Ryder (bryder@sgi.com)
    *        Copyright (C) 2002
    *            Kuba Ober (kuba@mareimbrium.org)
    *
   *        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.
   *
   * See Documentation/usb/usb-serial.txt for more information on using this
   * driver
   *
   * See http://ftdi-usb-sio.sourceforge.net for upto date testing info
   *        and extra documentation
   *
   * Change entries from 2004 and earlier can be found in versions of this
   * file in kernel versions prior to the 2.6.24 release.
   *
   */
  
  /* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */
  /* Thanx to FTDI for so kindly providing details of the protocol required */
  /*   to talk to the device */
  /* Thanx to gkh and the rest of the usb dev group for all code I have
     assimilated :-) */
  
  #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/uaccess.h>
  #include <linux/usb.h>
  #include <linux/serial.h>
  #include <linux/usb/serial.h>
  #include "ftdi_sio.h"
  
  /*
   * Version Information
   */
  #define DRIVER_VERSION "v1.4.3"
  #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
  #define DRIVER_DESC "USB FTDI Serial Converters Driver"
  
  static int debug;
  static __u16 vendor = FTDI_VID;
  static __u16 product;
  
  struct ftdi_private {
          ftdi_chip_type_t chip_type;
                                  /* type of device, either SIO or FT8U232AM */
          int baud_base;                /* baud base clock for divisor setting */
          int custom_divisor;        /* custom_divisor kludge, this is for
                                     baud_base (different from what goes to the
                                     chip!) */
          __u16 last_set_data_urb_value ;
                                  /* the last data state set - needed for doing
                                   * a break
                                   */
          int write_offset;       /* This is the offset in the usb data block to
                                   * write the serial data - it varies between
                                   * devices
                                   */
          int flags;                /* some ASYNC_xxxx flags are supported */
          unsigned long last_dtr_rts;        /* saved modem control outputs */
          wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
          char prev_status, diff_status;        /* Used for TIOCMIWAIT */
          __u8 rx_flags;                /* receive state flags (throttling) */
          spinlock_t rx_lock;        /* spinlock for receive state */
          struct delayed_work rx_work;
          struct usb_serial_port *port;
          int rx_processed;
          unsigned long rx_bytes;
  
          __u16 interface;        /* FT2232C port interface (0 for FT232/245) */
  
          speed_t force_baud;        /* if non-zero, force the baud rate to
                                     this value */
          int force_rtscts;        /* if non-zero, force RTS-CTS to always
                                     be enabled */
  
          spinlock_t tx_lock;        /* spinlock for transmit state */
          unsigned long tx_bytes;
          unsigned long tx_outstanding_bytes;
          unsigned long tx_outstanding_urbs;
  };
  
  /* struct ftdi_sio_quirk is used by devices requiring special attention. */
  struct ftdi_sio_quirk {
          int (*probe)(struct usb_serial *);
         /* Special settings for probed ports. */
         void (*port_probe)(struct ftdi_private *);
 };
 
 static int   ftdi_jtag_probe(struct usb_serial *serial);
 static int   ftdi_mtxorb_hack_setup(struct usb_serial *serial);
 static void  ftdi_USB_UIRT_setup(struct ftdi_private *priv);
 static void  ftdi_HE_TIRA1_setup(struct ftdi_private *priv);
 
 static struct ftdi_sio_quirk ftdi_jtag_quirk = {
         .probe        = ftdi_jtag_probe,
 };
 
 static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = {
         .probe  = ftdi_mtxorb_hack_setup,
 };
 
 static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = {
         .port_probe = ftdi_USB_UIRT_setup,
 };
 
 static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = {
         .port_probe = ftdi_HE_TIRA1_setup,
 };
 
 /*
  * The 8U232AM has the same API as the sio except for:
  * - it can support MUCH higher baudrates; up to:
  *   o 921600 for RS232 and 2000000 for RS422/485 at 48MHz
  *   o 230400 at 12MHz
  *   so .. 8U232AM's baudrate setting codes are different
  * - it has a two byte status code.
  * - it returns characters every 16ms (the FTDI does it every 40ms)
  *
  * the bcdDevice value is used to differentiate FT232BM and FT245BM from
  * the earlier FT8U232AM and FT8U232BM.  For now, include all known VID/PID
  * combinations in both tables.
  * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices,
  * but I don't know if those ever went into mass production. [Ian Abbott]
  */
 
 
 
 static struct usb_device_id id_table_combined [] = {
         { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_CANDAPTER_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_0_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_1_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_3_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_4_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_5_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_6_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SCS_DEVICE_7_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) },
         { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
         { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) },
         { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SPROG_II) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) },
         { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0100_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0101_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0102_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0103_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0104_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0105_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0106_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0107_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0108_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0109_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_010F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0110_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0111_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0112_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0113_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0114_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0115_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0116_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0117_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0118_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0119_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_011F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0120_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0121_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0122_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0123_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0124_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0125_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0126_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0127_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0128_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0129_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012C_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_012F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0130_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0131_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0132_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0133_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0134_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0135_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0136_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0137_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0138_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0139_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_013F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0140_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0141_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0142_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0143_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0144_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0145_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0146_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0147_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0148_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0149_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_014F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0150_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0151_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0152_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0153_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0154_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0155_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0156_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0157_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0158_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0159_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_015F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0160_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0161_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0162_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0163_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0164_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0165_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0166_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0167_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0168_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0169_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_016F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0170_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0171_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0172_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0173_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0174_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0175_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0176_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0177_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0178_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0179_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_017F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0180_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0181_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0182_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0183_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0184_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0185_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0186_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0187_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0188_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0189_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_018F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0190_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0191_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0192_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0193_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0194_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0195_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0196_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0197_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0198_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_0199_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019A_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019B_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019C_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019D_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019E_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_019F_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01A9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AD_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01AF_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01B9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BD_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01BF_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01C9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CD_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01CF_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01D9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DD_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01DF_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01E9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01EA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01EB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01EC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01ED_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01EE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01EF_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F0_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F1_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F2_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F3_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F4_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F5_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F6_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F7_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F8_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01F9_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FA_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FB_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FC_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FD_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FE_PID) },
         { USB_DEVICE(MTXORB_VID, MTXORB_FTDI_RANGE_01FF_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) },
         { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) },
         { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) },
         { USB_DEVICE(OCT_VID, OCT_US101_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk },
         { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk },
         { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) },
         { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) },
         { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) },
         { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) },
         /*
          * Due to many user requests for multiple ELV devices we enable
          * them by default.
          */
         { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1010PC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELV_HS485_PID) },
         { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) },
         { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) },
         { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) },
         { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) },
         { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) },
         { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) },
         { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) },
         { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) },
         { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) },
         { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_OCEANIC_PID) },
         { USB_DEVICE(TTI_VID, TTI_QL355P_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) },
         { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) },
         { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) },
         { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) },
         { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) },
         { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
         { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
         { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) },
         { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) },
         { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) },
         { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) },
         { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
         { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
         { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
         { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
         { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) },
         { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) },
         { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) },
         { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PHI_FISCO_PID) },
         { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
         { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FTDI_VID, LMI_LM3S_DEVEL_BOARD_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FTDI_VID, LMI_LM3S_EVAL_BOARD_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
         { USB_DEVICE(FTDI_VID, FTDI_REU_TINY_PID) },
         { USB_DEVICE(PAPOUCH_VID, PAPOUCH_QUIDO4x4_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_DOMINTELL_DGQG_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_DOMINTELL_DUSB_PID) },
         { },                                        /* Optional parameter entry */
         { }                                        /* Terminating entry */
 };
 
 MODULE_DEVICE_TABLE(usb, id_table_combined);
 
 static struct usb_driver ftdi_driver = {
         .name =                "ftdi_sio",
         .probe =        usb_serial_probe,
         .disconnect =        usb_serial_disconnect,
         .id_table =        id_table_combined,
         .no_dynamic_id =        1,
 };
 
 static const char *ftdi_chip_name[] = {
         [SIO] = "SIO",        /* the serial part of FT8U100AX */
         [FT8U232AM] = "FT8U232AM",
         [FT232BM] = "FT232BM",
         [FT2232C] = "FT2232C",
         [FT232RL] = "FT232RL",
 };
 
 
 /* Constants for read urb and write urb */
 #define BUFSZ 512
 #define PKTSZ 64
 
 /* rx_flags */
 #define THROTTLED                0x01
 #define ACTUALLY_THROTTLED        0x02
 
 /* Used for TIOCMIWAIT */
 #define FTDI_STATUS_B0_MASK        (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
 #define FTDI_STATUS_B1_MASK        (FTDI_RS_BI)
 /* End TIOCMIWAIT */
 
 #define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \
  | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP)
 
 /* function prototypes for a FTDI serial converter */
 static int  ftdi_sio_probe(struct usb_serial *serial,
                                         const struct usb_device_id *id);
 static void ftdi_shutdown(struct usb_serial *serial);
 static int  ftdi_sio_port_probe(struct usb_serial_port *port);
 static int  ftdi_sio_port_remove(struct usb_serial_port *port);
 static int  ftdi_open(struct tty_struct *tty,
                         struct usb_serial_port *port, struct file *filp);
 static void ftdi_close(struct tty_struct *tty,
                         struct usb_serial_port *port, struct file *filp);
 static int  ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
                         const unsigned char *buf, int count);
 static int  ftdi_write_room(struct tty_struct *tty);
 static int  ftdi_chars_in_buffer(struct tty_struct *tty);
 static void ftdi_write_bulk_callback(struct urb *urb);
 static void ftdi_read_bulk_callback(struct urb *urb);
 static void ftdi_process_read(struct work_struct *work);
 static void ftdi_set_termios(struct tty_struct *tty,
                         struct usb_serial_port *port, struct ktermios *old);
 static int  ftdi_tiocmget(struct tty_struct *tty, struct file *file);
 static int  ftdi_tiocmset(struct tty_struct *tty, struct file *file,
                         unsigned int set, unsigned int clear);
 static int  ftdi_ioctl(struct tty_struct *tty, struct file *file,
                         unsigned int cmd, unsigned long arg);
 static void ftdi_break_ctl(struct tty_struct *tty, int break_state);
 static void ftdi_throttle(struct tty_struct *tty);
 static void ftdi_unthrottle(struct tty_struct *tty);
 
 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base);
 static unsigned short int ftdi_232am_baud_to_divisor(int baud);
 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base);
 static __u32 ftdi_232bm_baud_to_divisor(int baud);
 
 static struct usb_serial_driver ftdi_sio_device = {
         .driver = {
                 .owner =        THIS_MODULE,
                 .name =                "ftdi_sio",
         },
         .description =                "FTDI USB Serial Device",
         .usb_driver =                 &ftdi_driver ,
         .id_table =                id_table_combined,
         .num_ports =                1,
         .probe =                ftdi_sio_probe,
         .port_probe =                ftdi_sio_port_probe,
         .port_remove =                ftdi_sio_port_remove,
         .open =                        ftdi_open,
         .close =                ftdi_close,
         .throttle =                ftdi_throttle,
         .unthrottle =                ftdi_unthrottle,
         .write =                ftdi_write,
         .write_room =                ftdi_write_room,
         .chars_in_buffer =        ftdi_chars_in_buffer,
         .read_bulk_callback =        ftdi_read_bulk_callback,
         .write_bulk_callback =        ftdi_write_bulk_callback,
         .tiocmget =             ftdi_tiocmget,
         .tiocmset =             ftdi_tiocmset,
         .ioctl =                ftdi_ioctl,
         .set_termios =                ftdi_set_termios,
         .break_ctl =                ftdi_break_ctl,
         .shutdown =                ftdi_shutdown,
 };
 
 
 #define WDR_TIMEOUT 5000 /* default urb timeout */
 #define WDR_SHORT_TIMEOUT 1000        /* shorter urb timeout */
 
 /* High and low are for DTR, RTS etc etc */
 #define HIGH 1
 #define LOW 0
 
 /* number of outstanding urbs to prevent userspace DoS from happening */
 #define URB_UPPER_LIMIT        42
 
 /*
  * ***************************************************************************
  * Utility functions
  * ***************************************************************************
  */
 
 static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
 {
         unsigned short int divisor;
         /* divisor shifted 3 bits to the left */
         int divisor3 = base / 2 / baud;
         if ((divisor3 & 0x7) == 7)
                 divisor3++; /* round x.7/8 up to x+1 */
         divisor = divisor3 >> 3;
         divisor3 &= 0x7;
         if (divisor3 == 1)
                 divisor |= 0xc000;
         else if (divisor3 >= 4)
                 divisor |= 0x4000;
         else if (divisor3 != 0)
                 divisor |= 0x8000;
         else if (divisor == 1)
                 divisor = 0;        /* special case for maximum baud rate */
         return divisor;
 }
 
 static unsigned short int ftdi_232am_baud_to_divisor(int baud)
 {
          return ftdi_232am_baud_base_to_divisor(baud, 48000000);
 }
 
 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
 {
         static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
         __u32 divisor;
         /* divisor shifted 3 bits to the left */
         int divisor3 = base / 2 / baud;
         divisor = divisor3 >> 3;
         divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
         /* Deal with special cases for highest baud rates. */
         if (divisor == 1)
                 divisor = 0;
         else if (divisor == 0x4001)
                 divisor = 1;
         return divisor;
 }
 
 static __u32 ftdi_232bm_baud_to_divisor(int baud)
 {
          return ftdi_232bm_baud_base_to_divisor(baud, 48000000);
 }
 
 #define set_mctrl(port, set)                update_mctrl((port), (set), 0)
 #define clear_mctrl(port, clear)        update_mctrl((port), 0, (clear))
 
 static int update_mctrl(struct usb_serial_port *port, unsigned int set,
                                                         unsigned int clear)
 {
         struct ftdi_private *priv = usb_get_serial_port_data(port);
         char *buf;
         unsigned urb_value;
         int rv;
 
         if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
                 dbg("%s - DTR|RTS not being set|cleared", __func__);
                 return 0;        /* no change */
         }
 
         buf = kmalloc(1, GFP_NOIO);
         if (!buf)
                 return -ENOMEM;
 
         clear &= ~set;        /* 'set' takes precedence over 'clear' */
         urb_value = 0;
         if (clear & TIOCM_DTR)
                 urb_value |= FTDI_SIO_SET_DTR_LOW;
         if (clear & TIOCM_RTS)
                 urb_value |= FTDI_SIO_SET_RTS_LOW;
         if (set & TIOCM_DTR)
                 urb_value |= FTDI_SIO_SET_DTR_HIGH;
         if (set & TIOCM_RTS)
                 urb_value |= FTDI_SIO_SET_RTS_HIGH;
         rv = usb_control_msg(port->serial->dev,
                                usb_sndctrlpipe(port->serial->dev, 0),
                                FTDI_SIO_SET_MODEM_CTRL_REQUEST,
                                FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE,
                                urb_value, priv->interface,
                                buf, 0, WDR_TIMEOUT);
 
         kfree(buf);
         if (rv < 0) {
                 dbg("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
                                 __func__,
                                 (set & TIOCM_DTR) ? "HIGH" :
                                 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
                                 (set & TIOCM_RTS) ? "HIGH" :
                                 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
         } else {
                 dbg("%s - DTR %s, RTS %s", __func__,
                                 (set & TIOCM_DTR) ? "HIGH" :
                                 (clear & TIOCM_DTR) ? "LOW" : "unchanged",
                                 (set & TIOCM_RTS) ? "HIGH" :
                                 (clear & TIOCM_RTS) ? "LOW" : "unchanged");
                 /* FIXME: locking on last_dtr_rts */
                 priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set;
         }
         return rv;
 }
 
 
 static __u32 get_ftdi_divisor(struct tty_struct *tty,
                                                 struct usb_serial_port *port)
 { /* get_ftdi_divisor */
         struct ftdi_private *priv = usb_get_serial_port_data(port);
         __u32 div_value = 0;
         int div_okay = 1;
         int baud;
 
         /*
          * The logic involved in setting the baudrate can be cleanly split into
          * 3 steps.
          * 1. Standard baud rates are set in tty->termios->c_cflag
          * 2. If these are not enough, you can set any speed using alt_speed as
          * follows:
          *    - set tty->termios->c_cflag speed to B38400
          *    - set your real speed in tty->alt_speed; it gets ignored when
          *      alt_speed==0, (or)
          *    - call TIOCSSERIAL ioctl with (struct serial_struct) set as
          *        follows:
          *      flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP],
          *        this just sets alt_speed to (HI: 57600, VHI: 115200,
          *        SHI: 230400, WARP: 460800)
          * ** Steps 1, 2 are done courtesy of tty_get_baud_rate
          * 3. You can also set baud rate by setting custom divisor as follows
          *    - set tty->termios->c_cflag speed to B38400
          *    - call TIOCSSERIAL ioctl with (struct serial_struct) set as
          *        follows:
          *      o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST
          *      o custom_divisor set to baud_base / your_new_baudrate
          * ** Step 3 is done courtesy of code borrowed from serial.c
          *    I should really spend some time and separate + move this common
          *    code to serial.c, it is replicated in nearly every serial driver
          *    you see.
          */
 
         /* 1. Get the baud rate from the tty settings, this observes
               alt_speed hack */
 
         baud = tty_get_baud_rate(tty);
         dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud);
 
         /* 2. Observe async-compatible custom_divisor hack, update baudrate
            if needed */
 
         if (baud == 38400 &&
             ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
              (priv->custom_divisor)) {
                 baud = priv->baud_base / priv->custom_divisor;
                 dbg("%s - custom divisor %d sets baud rate to %d",
                                 __func__, priv->custom_divisor, baud);
         }
 
         /* 3. Convert baudrate to device-specific divisor */
 
         if (!baud)
                 baud = 9600;
         switch (priv->chip_type) {
         case SIO: /* SIO chip */
                 switch (baud) {
                 case 300: div_value = ftdi_sio_b300; break;
                 case 600: div_value = ftdi_sio_b600; break;
                 case 1200: div_value = ftdi_sio_b1200; break;
                 case 2400: div_value = ftdi_sio_b2400; break;
                 case 4800: div_value = ftdi_sio_b4800; break;
                 case 9600: div_value = ftdi_sio_b9600; break;
                 case 19200: div_value = ftdi_sio_b19200; break;
                 case 38400: div_value = ftdi_sio_b38400; break;
                 case 57600: div_value = ftdi_sio_b57600;  break;
                 case 115200: div_value = ftdi_sio_b115200; break;
                 } /* baud */
                 if (div_value == 0) {
                         dbg("%s - Baudrate (%d) requested is not supported",
                                                         __func__,  baud);
                         div_value = ftdi_sio_b9600;
                         baud = 9600;
                         div_okay = 0;
                 }
                 break;
         case FT8U232AM: /* 8U232AM chip */
                 if (baud <= 3000000) {
                         div_value = ftdi_232am_baud_to_divisor(baud);
                 } else {
                         dbg("%s - Baud rate too high!", __func__);
                         baud = 9600;
                         div_value = ftdi_232am_baud_to_divisor(9600);
                         div_okay = 0;
                 }
                 break;
         case FT232BM: /* FT232BM chip */
         case FT2232C: /* FT2232C chip */
         case FT232RL:
                 if (baud <= 3000000) {
                         div_value = ftdi_232bm_baud_to_divisor(baud);
                 } else {
                         dbg("%s - Baud rate too high!", __func__);
                         div_value = ftdi_232bm_baud_to_divisor(9600);
                         div_okay = 0;
                         baud = 9600;
                 }
                 break;
         } /* priv->chip_type */
 
         if (div_okay) {
                 dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s",
                         __func__, baud, (unsigned long)div_value,
                         ftdi_chip_name[priv->chip_type]);
         }
 
         tty_encode_baud_rate(tty, baud, baud);
         return div_value;
 }
 
 static int change_speed(struct tty_struct *tty, struct usb_serial_port *port)
 {
         struct ftdi_private *priv = usb_get_serial_port_data(port);
        char *buf;
        __u16 urb_value;
        __u16 urb_index;
        __u32 urb_index_value;
        int rv;

        buf = kmalloc(1, GFP_NOIO);
        if (!buf)
                return -ENOMEM;

        urb_index_value = get_ftdi_divisor(tty, port);
        urb_value = (__u16)urb_index_value;
        urb_index = (__u16)(urb_index_value >> 16);
        if (priv->interface) {        /* FT2232C */
                urb_index = (__u16)((urb_index << 8) | priv->interface);
        }

        rv = usb_control_msg(port->serial->dev,
                            usb_sndctrlpipe(port->serial->dev, 0),
                            FTDI_SIO_SET_BAUDRATE_REQUEST,
                            FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
                            urb_value, urb_index,
                            buf, 0, WDR_SHORT_TIMEOUT);

        kfree(buf);
        return rv;
}



static int get_serial_info(struct usb_serial_port *port,
                                struct serial_struct __user *retinfo)
{
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct serial_struct tmp;

        if (!retinfo)
                return -EFAULT;
        memset(&tmp, 0, sizeof(tmp));
        tmp.flags = priv->flags;
        tmp.baud_base = priv->baud_base;
        tmp.custom_divisor = priv->custom_divisor;
        if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
                return -EFAULT;
        return 0;
} /* get_serial_info */


static int set_serial_info(struct tty_struct *tty,
        struct usb_serial_port *port, struct serial_struct __user *newinfo)
{ /* set_serial_info */
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct serial_struct new_serial;
        struct ftdi_private old_priv;

        if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
                return -EFAULT;
        old_priv = *priv;

        /* Do error checking and permission checking */

        if (!capable(CAP_SYS_ADMIN)) {
                if (((new_serial.flags & ~ASYNC_USR_MASK) !=
                     (priv->flags & ~ASYNC_USR_MASK)))
                        return -EPERM;
                priv->flags = ((priv->flags & ~ASYNC_USR_MASK) |
                               (new_serial.flags & ASYNC_USR_MASK));
                priv->custom_divisor = new_serial.custom_divisor;
                goto check_and_exit;
        }

        if ((new_serial.baud_base != priv->baud_base) &&
            (new_serial.baud_base < 9600))
                return -EINVAL;

        /* Make the changes - these are privileged changes! */

        priv->flags = ((priv->flags & ~ASYNC_FLAGS) |
                                        (new_serial.flags & ASYNC_FLAGS));
        priv->custom_divisor = new_serial.custom_divisor;

        tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;

check_and_exit:
        if ((old_priv.flags & ASYNC_SPD_MASK) !=
             (priv->flags & ASYNC_SPD_MASK)) {
                if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
                        tty->alt_speed = 57600;
                else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
                        tty->alt_speed = 115200;
                else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
                        tty->alt_speed = 230400;
                else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
                        tty->alt_speed = 460800;
                else
                        tty->alt_speed = 0;
        }
        if (((old_priv.flags & ASYNC_SPD_MASK) !=
             (priv->flags & ASYNC_SPD_MASK)) ||
            (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
             (old_priv.custom_divisor != priv->custom_divisor))) {
                change_speed(tty, port);
        }
        return 0;

} /* set_serial_info */


/* Determine type of FTDI chip based on USB config and descriptor. */
static void ftdi_determine_type(struct usb_serial_port *port)
{
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct usb_serial *serial = port->serial;
        struct usb_device *udev = serial->dev;
        unsigned version;
        unsigned interfaces;

        /* Assume it is not the original SIO device for now. */
        priv->baud_base = 48000000 / 2;
        priv->write_offset = 0;

        version = le16_to_cpu(udev->descriptor.bcdDevice);
        interfaces = udev->actconfig->desc.bNumInterfaces;
        dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __func__,
                        version, interfaces);
        if (interfaces > 1) {
                int inter;

                /* Multiple interfaces.  Assume FT2232C. */
                priv->chip_type = FT2232C;
                /* Determine interface code. */
                inter = serial->interface->altsetting->desc.bInterfaceNumber;
                if (inter == 0)
                        priv->interface = PIT_SIOA;
                else
                        priv->interface = PIT_SIOB;
                /* BM-type devices have a bug where bcdDevice gets set
                 * to 0x200 when iSerialNumber is 0.  */
                if (version < 0x500) {
                        dbg("%s: something fishy - bcdDevice too low for multi-interface device",
                                        __func__);
                }
        } else if (version < 0x200) {
                /* Old device.  Assume its the original SIO. */
                priv->chip_type = SIO;
                priv->baud_base = 12000000 / 16;
                priv->write_offset = 1;
        } else if (version < 0x400) {
                /* Assume its an FT8U232AM (or FT8U245AM) */
                /* (It might be a BM because of the iSerialNumber bug,
                 * but it will still work as an AM device.) */
                priv->chip_type = FT8U232AM;
        } else if (version < 0x600) {
                /* Assume its an FT232BM (or FT245BM) */
                priv->chip_type = FT232BM;
        } else {
                /* Assume its an FT232R  */
                priv->chip_type = FT232RL;
        }
        dev_info(&udev->dev, "Detected %s\n", ftdi_chip_name[priv->chip_type]);
}


/*
 * ***************************************************************************
 * Sysfs Attribute
 * ***************************************************************************
 */

static ssize_t show_latency_timer(struct device *dev,
                                struct device_attribute *attr, char *buf)
{
        struct usb_serial_port *port = to_usb_serial_port(dev);
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct usb_device *udev = port->serial->dev;
        unsigned short latency = 0;
        int rv = 0;


        dbg("%s", __func__);

        rv = usb_control_msg(udev,
                             usb_rcvctrlpipe(udev, 0),
                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
                             0, priv->interface,
                             (char *) &latency, 1, WDR_TIMEOUT);

        if (rv < 0) {
                dev_err(dev, "Unable to read latency timer: %i\n", rv);
                return -EIO;
        }
        return sprintf(buf, "%i\n", latency);
}

/* Write a new value of the latency timer, in units of milliseconds. */
static ssize_t store_latency_timer(struct device *dev,
                        struct device_attribute *attr, const char *valbuf,
                        size_t count)
{
        struct usb_serial_port *port = to_usb_serial_port(dev);
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct usb_device *udev = port->serial->dev;
        char buf[1];
        int v = simple_strtoul(valbuf, NULL, 10);
        int rv = 0;

        dbg("%s: setting latency timer = %i", __func__, v);

        rv = usb_control_msg(udev,
                             usb_sndctrlpipe(udev, 0),
                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
                             v, priv->interface,
                             buf, 0, WDR_TIMEOUT);

        if (rv < 0) {
                dev_err(dev, "Unable to write latency timer: %i\n", rv);
                return -EIO;
        }

        return count;
}

/* Write an event character directly to the FTDI register.  The ASCII
   value is in the low 8 bits, with the enable bit in the 9th bit. */
static ssize_t store_event_char(struct device *dev,
        struct device_attribute *attr, const char *valbuf, size_t count)
{
        struct usb_serial_port *port = to_usb_serial_port(dev);
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct usb_device *udev = port->serial->dev;
        char buf[1];
        int v = simple_strtoul(valbuf, NULL, 10);
        int rv = 0;

        dbg("%s: setting event char = %i", __func__, v);

        rv = usb_control_msg(udev,
                             usb_sndctrlpipe(udev, 0),
                             FTDI_SIO_SET_EVENT_CHAR_REQUEST,
                             FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE,
                             v, priv->interface,
                             buf, 0, WDR_TIMEOUT);

        if (rv < 0) {
                dbg("Unable to write event character: %i", rv);
                return -EIO;
        }

        return count;
}

static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer,
                                                        store_latency_timer);
static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);

static int create_sysfs_attrs(struct usb_serial_port *port)
{
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        int retval = 0;

        dbg("%s", __func__);

        /* XXX I've no idea if the original SIO supports the event_char
         * sysfs parameter, so I'm playing it safe.  */
        if (priv->chip_type != SIO) {
                dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]);
                retval = device_create_file(&port->dev, &dev_attr_event_char);
                if ((!retval) &&
                    (priv->chip_type == FT232BM ||
                     priv->chip_type == FT2232C ||
                     priv->chip_type == FT232RL)) {
                        retval = device_create_file(&port->dev,
                                                    &dev_attr_latency_timer);
                }
        }
        return retval;
}

static void remove_sysfs_attrs(struct usb_serial_port *port)
{
        struct ftdi_private *priv = usb_get_serial_port_data(port);

        dbg("%s", __func__);

        /* XXX see create_sysfs_attrs */
        if (priv->chip_type != SIO) {
                device_remove_file(&port->dev, &dev_attr_event_char);
                if (priv->chip_type == FT232BM ||
                    priv->chip_type == FT2232C ||
                    priv->chip_type == FT232RL) {
                        device_remove_file(&port->dev, &dev_attr_latency_timer);
                }
        }

}

/*
 * ***************************************************************************
 * FTDI driver specific functions
 * ***************************************************************************
 */

/* Probe function to check for special devices */
static int ftdi_sio_probe(struct usb_serial *serial,
                                        const struct usb_device_id *id)
{
        struct ftdi_sio_quirk *quirk =
                                (struct ftdi_sio_quirk *)id->driver_info;

        if (quirk && quirk->probe) {
                int ret = quirk->probe(serial);
                if (ret != 0)
                        return ret;
        }

        usb_set_serial_data(serial, (void *)id->driver_info);

        return 0;
}

static int ftdi_sio_port_probe(struct usb_serial_port *port)
{
        struct ftdi_private *priv;
        struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial);


        dbg("%s", __func__);

        priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL);
        if (!priv) {
                dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
                                        sizeof(struct ftdi_private));
                return -ENOMEM;
        }

        spin_lock_init(&priv->rx_lock);
        spin_lock_init(&priv->tx_lock);
        init_waitqueue_head(&priv->delta_msr_wait);
        /* This will push the characters through immediately rather
           than queue a task to deliver them */
        priv->flags = ASYNC_LOW_LATENCY;

        if (quirk && quirk->port_probe)
                quirk->port_probe(priv);

        /* Increase the size of read buffers */
        kfree(port->bulk_in_buffer);
        port->bulk_in_buffer = kmalloc(BUFSZ, GFP_KERNEL);
        if (!port->bulk_in_buffer) {
                kfree(priv);
                return -ENOMEM;
        }
        if (port->read_urb) {
                port->read_urb->transfer_buffer = port->bulk_in_buffer;
                port->read_urb->transfer_buffer_length = BUFSZ;
        }

        INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read);
        priv->port = port;

        /* Free port's existing write urb and transfer buffer. */
        if (port->write_urb) {
                usb_free_urb(port->write_urb);
                port->write_urb = NULL;
        }
        kfree(port->bulk_out_buffer);
        port->bulk_out_buffer = NULL;

        usb_set_serial_port_data(port, priv);

        ftdi_determine_type(port);
        create_sysfs_attrs(port);
        return 0;
}

/* Setup for the USB-UIRT device, which requires hardwired
 * baudrate (38400 gets mapped to 312500) */
/* Called from usbserial:serial_probe */
static void ftdi_USB_UIRT_setup(struct ftdi_private *priv)
{
        dbg("%s", __func__);

        priv->flags |= ASYNC_SPD_CUST;
        priv->custom_divisor = 77;
        priv->force_baud = 38400;
} /* ftdi_USB_UIRT_setup */

/* Setup for the HE-TIRA1 device, which requires hardwired
 * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled.  */

static void ftdi_HE_TIRA1_setup(struct ftdi_private *priv)
{
        dbg("%s", __func__);

        priv->flags |= ASYNC_SPD_CUST;
        priv->custom_divisor = 240;
        priv->force_baud = 38400;
        priv->force_rtscts = 1;
} /* ftdi_HE_TIRA1_setup */

/*
 * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko
 * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from
 * userspace using openocd.
 */
static int ftdi_jtag_probe(struct usb_serial *serial)
{
        struct usb_device *udev = serial->dev;
        struct usb_interface *interface = serial->interface;

        dbg("%s", __func__);

        if (interface == udev->actconfig->interface[0]) {
                dev_info(&udev->dev,
                         "Ignoring serial port reserved for JTAG\n");
                return -ENODEV;
        }

        return 0;
}

/*
 * The Matrix Orbital VK204-25-USB has an invalid IN endpoint.
 * We have to correct it if we want to read from it.
 */
static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
{
        struct usb_host_endpoint *ep = serial->dev->ep_in[1];
        struct usb_endpoint_descriptor *ep_desc = &ep->desc;

        if (ep->enabled && ep_desc->wMaxPacketSize == 0) {
                ep_desc->wMaxPacketSize = cpu_to_le16(0x40);
                dev_info(&serial->dev->dev,
                         "Fixing invalid wMaxPacketSize on read pipe\n");
        }

        return 0;
}

/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
 *   it is called when the usb device is disconnected
 *
 *   usbserial:usb_serial_disconnect
 *      calls __serial_close for each open of the port
 *      shutdown is called then (ie ftdi_shutdown)
 */
static void ftdi_shutdown(struct usb_serial *serial)
{
        dbg("%s", __func__);
}

static int ftdi_sio_port_remove(struct usb_serial_port *port)
{
        struct ftdi_private *priv = usb_get_serial_port_data(port);

        dbg("%s", __func__);

        remove_sysfs_attrs(port);

        /* all open ports are closed at this point
         *    (by usbserial.c:__serial_close, which calls ftdi_close)
         */

        if (priv) {
                usb_set_serial_port_data(port, NULL);
                kfree(priv);
        }

        return 0;
}

static int ftdi_open(struct tty_struct *tty,
                        struct usb_serial_port *port, struct file *filp)
{ /* ftdi_open */
        struct usb_device *dev = port->serial->dev;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        unsigned long flags;

        int result = 0;
        char buf[1]; /* Needed for the usb_control_msg I think */

        dbg("%s", __func__);

        spin_lock_irqsave(&priv->tx_lock, flags);
        priv->tx_bytes = 0;
        spin_unlock_irqrestore(&priv->tx_lock, flags);
        spin_lock_irqsave(&priv->rx_lock, flags);
        priv->rx_bytes = 0;
        spin_unlock_irqrestore(&priv->rx_lock, flags);

        if (tty)
                tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;

        /* No error checking for this (will get errors later anyway) */
        /* See ftdi_sio.h for description of what is reset */
        usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                        FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE,
                        FTDI_SIO_RESET_SIO,
                        priv->interface, buf, 0, WDR_TIMEOUT);

        /* Termios defaults are set by usb_serial_init. We don't change
           port->tty->termios - this would lose speed settings, etc.
           This is same behaviour as serial.c/rs_open() - Kuba */

        /* ftdi_set_termios  will send usb control messages */
        if (tty)
                ftdi_set_termios(tty, port, tty->termios);

        /* FIXME: Flow control might be enabled, so it should be checked -
           we have no control of defaults! */
        /* Turn on RTS and DTR since we are not flow controlling by default */
        set_mctrl(port, TIOCM_DTR | TIOCM_RTS);

        /* Not throttled */
        spin_lock_irqsave(&priv->rx_lock, flags);
        priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
        spin_unlock_irqrestore(&priv->rx_lock, flags);

        /* Start reading from the device */
        priv->rx_processed = 0;
        usb_fill_bulk_urb(port->read_urb, dev,
                        usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress),
                        port->read_urb->transfer_buffer,
                                port->read_urb->transfer_buffer_length,
                        ftdi_read_bulk_callback, port);
        result = usb_submit_urb(port->read_urb, GFP_KERNEL);
        if (result)
                dev_err(&port->dev,
                        "%s - failed submitting read urb, error %d\n",
                        __func__, result);


        return result;
} /* ftdi_open */



/*
 * usbserial:__serial_close  only calls ftdi_close if the point is open
 *
 *   This only gets called when it is the last close
 *
 *
 */

static void ftdi_close(struct tty_struct *tty,
                        struct usb_serial_port *port, struct file *filp)
{ /* ftdi_close */
        unsigned int c_cflag = tty->termios->c_cflag;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        char buf[1];

        dbg("%s", __func__);

        mutex_lock(&port->serial->disc_mutex);
        if (c_cflag & HUPCL && !port->serial->disconnected) {
                /* Disable flow control */
                if (usb_control_msg(port->serial->dev,
                                    usb_sndctrlpipe(port->serial->dev, 0),
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST,
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
                                    0, priv->interface, buf, 0,
                                    WDR_TIMEOUT) < 0) {
                        dev_err(&port->dev, "error from flowcontrol urb\n");
                }

                /* drop RTS and DTR */
                clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
        } /* Note change no line if hupcl is off */
        mutex_unlock(&port->serial->disc_mutex);

        /* cancel any scheduled reading */
        cancel_delayed_work(&priv->rx_work);
        flush_scheduled_work();

        /* shutdown our bulk read */
        usb_kill_urb(port->read_urb);
} /* ftdi_close */



/* The SIO requires the first byte to have:
 *  B0 1
 *  B1 0
 *  B2..7 length of message excluding byte 0
 *
 * The new devices do not require this byte
 */
static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
                           const unsigned char *buf, int count)
{ /* ftdi_write */
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct urb *urb;
        unsigned char *buffer;
        int data_offset ;       /* will be 1 for the SIO and 0 otherwise */
        int status;
        int transfer_size;
        unsigned long flags;

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

        if (count == 0) {
                dbg("write request of 0 bytes");
                return 0;
        }
        spin_lock_irqsave(&priv->tx_lock, flags);
        if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) {
                spin_unlock_irqrestore(&priv->tx_lock, flags);
                dbg("%s - write limit hit\n", __func__);
                return 0;
        }
        priv->tx_outstanding_urbs++;
        spin_unlock_irqrestore(&priv->tx_lock, flags);

        data_offset = priv->write_offset;
        dbg("data_offset set to %d", data_offset);

        /* Determine total transfer size */
        transfer_size = count;
        if (data_offset > 0) {
                /* Original sio needs control bytes too... */
                transfer_size += (data_offset *
                                ((count + (PKTSZ - 1 - data_offset)) /
                                 (PKTSZ - data_offset)));
        }

        buffer = kmalloc(transfer_size, GFP_ATOMIC);
        if (!buffer) {
                dev_err(&port->dev,
                        "%s ran out of kernel memory for urb ...\n", __func__);
                count = -ENOMEM;
                goto error_no_buffer;
        }

        urb = usb_alloc_urb(0, GFP_ATOMIC);
        if (!urb) {
                dev_err(&port->dev, "%s - no more free urbs\n", __func__);
                count = -ENOMEM;
                goto error_no_urb;
        }

        /* Copy data */
        if (data_offset > 0) {
                /* Original sio requires control byte at start of
                   each packet. */
                int user_pktsz = PKTSZ - data_offset;
                int todo = count;
                unsigned char *first_byte = buffer;
                const unsigned char *current_position = buf;

                while (todo > 0) {
                        if (user_pktsz > todo)
                                user_pktsz = todo;
                        /* Write the control byte at the front of the packet*/
                        *first_byte = 1 | ((user_pktsz) << 2);
                        /* Copy data for packet */
                        memcpy(first_byte + data_offset,
                                current_position, user_pktsz);
                        first_byte += user_pktsz + data_offset;
                        current_position += user_pktsz;
                        todo -= user_pktsz;
                }
        } else {
                /* No control byte required. */
                /* Copy in the data to send */
                memcpy(buffer, buf, count);
        }

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

        /* fill the buffer and send it */
        usb_fill_bulk_urb(urb, port->serial->dev,
                        usb_sndbulkpipe(port->serial->dev,
                                        port->bulk_out_endpointAddress),
                        buffer, transfer_size,
                        ftdi_write_bulk_callback, port);

        status = usb_submit_urb(urb, GFP_ATOMIC);
        if (status) {
                dev_err(&port->dev,
                        "%s - failed submitting write urb, error %d\n",
                        __func__, status);
                count = status;
                goto error;
        } else {
                spin_lock_irqsave(&priv->tx_lock, flags);
                priv->tx_outstanding_bytes += count;
                priv->tx_bytes += count;
                spin_unlock_irqrestore(&priv->tx_lock, flags);
        }

        /* we are done with this urb, so let the host driver
         * really free it when it is finished with it */
        usb_free_urb(urb);

        dbg("%s write returning: %d", __func__, count);
        return count;
error:
        usb_free_urb(urb);
error_no_urb:
        kfree(buffer);
error_no_buffer:
        spin_lock_irqsave(&priv->tx_lock, flags);
        priv->tx_outstanding_urbs--;
        spin_unlock_irqrestore(&priv->tx_lock, flags);
        return count;
} /* ftdi_write */


/* This function may get called when the device is closed */

static void ftdi_write_bulk_callback(struct urb *urb)
{
        unsigned long flags;
        struct usb_serial_port *port = urb->context;
        struct ftdi_private *priv;
        int data_offset;       /* will be 1 for the SIO and 0 otherwise */
        unsigned long countback;
        int status = urb->status;

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

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

        if (status) {
                dbg("nonzero write bulk status received: %d", status);
                return;
        }

        priv = usb_get_serial_port_data(port);
        if (!priv) {
                dbg("%s - bad port private data pointer - exiting", __func__);
                return;
        }
        /* account for transferred data */
        countback = urb->actual_length;
        data_offset = priv->write_offset;
        if (data_offset > 0) {
                /* Subtract the control bytes */
                countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
        }
        spin_lock_irqsave(&priv->tx_lock, flags);
        --priv->tx_outstanding_urbs;
        priv->tx_outstanding_bytes -= countback;
        spin_unlock_irqrestore(&priv->tx_lock, flags);

        usb_serial_port_softint(port);
} /* ftdi_write_bulk_callback */


static int ftdi_write_room(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        int room;
        unsigned long flags;

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

        spin_lock_irqsave(&priv->tx_lock, flags);
        if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) {
                /*
                 * We really can take anything the user throws at us
                 * but let's pick a nice big number to tell the tty
                 * layer that we have lots of free space
                 */
                room = 2048;
        } else {
                room = 0;
        }
        spin_unlock_irqrestore(&priv->tx_lock, flags);
        return room;
}

static int ftdi_chars_in_buffer(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        int buffered;
        unsigned long flags;

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

        spin_lock_irqsave(&priv->tx_lock, flags);
        buffered = (int)priv->tx_outstanding_bytes;
        spin_unlock_irqrestore(&priv->tx_lock, flags);
        if (buffered < 0) {
                dev_err(&port->dev, "%s outstanding tx bytes is negative!\n",
                        __func__);
                buffered = 0;
        }
        return buffered;
}

static void ftdi_read_bulk_callback(struct urb *urb)
{
        struct usb_serial_port *port = urb->context;
        struct tty_struct *tty;
        struct ftdi_private *priv;
        unsigned long countread;
        unsigned long flags;
        int status = urb->status;

        if (urb->number_of_packets > 0) {
                dev_err(&port->dev, "%s transfer_buffer_length %d "
                        "actual_length %d number of packets %d\n", __func__,
                        urb->transfer_buffer_length,
                        urb->actual_length, urb->number_of_packets);
                dev_err(&port->dev, "%s transfer_flags %x\n", __func__,
                        urb->transfer_flags);
        }

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

        if (port->port.count <= 0)
                return;

        tty = tty_port_tty_get(&port->port);
        if (!tty) {
                dbg("%s - bad tty pointer - exiting", __func__);
                return;
        }

        priv = usb_get_serial_port_data(port);
        if (!priv) {
                dbg("%s - bad port private data pointer - exiting", __func__);
                goto out;
        }

        if (urb != port->read_urb)
                dev_err(&port->dev, "%s - Not my urb!\n", __func__);

        if (status) {
                /* This will happen at close every time so it is a dbg not an
                   err */
                dbg("(this is ok on close) nonzero read bulk status received: %d", status);
                goto out;
        }

        /* count data bytes, but not status bytes */
        countread = urb->actual_length;
        countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
        spin_lock_irqsave(&priv->rx_lock, flags);
        priv->rx_bytes += countread;
        spin_unlock_irqrestore(&priv->rx_lock, flags);

        ftdi_process_read(&priv->rx_work.work);
out:
        tty_kref_put(tty);
} /* ftdi_read_bulk_callback */


static void ftdi_process_read(struct work_struct *work)
{ /* ftdi_process_read */
        struct ftdi_private *priv =
                container_of(work, struct ftdi_private, rx_work.work);
        struct usb_serial_port *port = priv->port;
        struct urb *urb;
        struct tty_struct *tty;
        char error_flag;
        unsigned char *data;

        int i;
        int result;
        int need_flip;
        int packet_offset;
        unsigned long flags;

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

        if (port->port.count <= 0)
                return;

        tty = tty_port_tty_get(&port->port);
        if (!tty) {
                dbg("%s - bad tty pointer - exiting", __func__);
                return;
        }

        priv = usb_get_serial_port_data(port);
        if (!priv) {
                dbg("%s - bad port private data pointer - exiting", __func__);
                goto out;
        }

        urb = port->read_urb;
        if (!urb) {
                dbg("%s - bad read_urb pointer - exiting", __func__);
                goto out;
        }

        data = urb->transfer_buffer;

        if (priv->rx_processed) {
                dbg("%s - already processed: %d bytes, %d remain", __func__,
                                priv->rx_processed,
                                urb->actual_length - priv->rx_processed);
        } else {
                /* The first two bytes of every read packet are status */
                if (urb->actual_length > 2)
                        usb_serial_debug_data(debug, &port->dev, __func__,
                                                urb->actual_length, data);
                else
                        dbg("Status only: %03oo %03oo", data[0], data[1]);
        }


        /* TO DO -- check for hung up line and handle appropriately: */
        /*   send hangup  */
        /* See acm.c - you do a tty_hangup  - eg tty_hangup(tty) */
        /* if CD is dropped and the line is not CLOCAL then we should hangup */

        need_flip = 0;
        for (packet_offset = priv->rx_processed;
                packet_offset < urb->actual_length; packet_offset += PKTSZ) {
                int length;

                /* Compare new line status to the old one, signal if different/
                   N.B. packet may be processed more than once, but differences
                   are only processed once.  */
                if (priv != NULL) {
                        char new_status = data[packet_offset + 0] &
                                                        FTDI_STATUS_B0_MASK;
                        if (new_status != priv->prev_status) {
                                priv->diff_status |=
                                        new_status ^ priv->prev_status;
                                wake_up_interruptible(&priv->delta_msr_wait);
                                priv->prev_status = new_status;
                        }
                }

                length = min(PKTSZ, urb->actual_length-packet_offset)-2;
                if (length < 0) {
                        dev_err(&port->dev, "%s - bad packet length: %d\n",
                                __func__, length+2);
                        length = 0;
                }

                if (priv->rx_flags & THROTTLED) {
                        dbg("%s - throttled", __func__);
                        break;
                }
                if (tty_buffer_request_room(tty, length) < length) {
                        /* break out & wait for throttling/unthrottling to
                           happen */
                        dbg("%s - receive room low", __func__);
                        break;
                }

                /* Handle errors and break */
                error_flag = TTY_NORMAL;
                /* Although the device uses a bitmask and hence can have
                   multiple errors on a packet - the order here sets the
                   priority the error is returned to the tty layer  */

                if (data[packet_offset+1] & FTDI_RS_OE) {
                        error_flag = TTY_OVERRUN;
                        dbg("OVERRRUN error");
                }
                if (data[packet_offset+1] & FTDI_RS_BI) {
                        error_flag = TTY_BREAK;
                        dbg("BREAK received");
                }
                if (data[packet_offset+1] & FTDI_RS_PE) {
                        error_flag = TTY_PARITY;
                        dbg("PARITY error");
                }
                if (data[packet_offset+1] & FTDI_RS_FE) {
                        error_flag = TTY_FRAME;
                        dbg("FRAMING error");
                }
                if (length > 0) {
                        for (i = 2; i < length+2; i++) {
                                /* Note that the error flag is duplicated for
                                   every character received since we don't know
                                   which character it applied to */
                                tty_insert_flip_char(tty,
                                        data[packet_offset + i], error_flag);
                        }
                        need_flip = 1;
                }

#ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW
                /* if a parity error is detected you get status packets forever
                   until a character is sent without a parity error.
                   This doesn't work well since the application receives a
                   never ending stream of bad data - even though new data
                   hasn't been sent. Therefore I (bill) have taken this out.
                   However - this might make sense for framing errors and so on
                   so I am leaving the code in for now.
                */
                else {
                        if (error_flag != TTY_NORMAL) {
                                dbg("error_flag is not normal");
                                /* In this case it is just status - if that is
                                   an error send a bad character */
                                if (tty->flip.count >= TTY_FLIPBUF_SIZE)
                                        tty_flip_buffer_push(tty);
                                tty_insert_flip_char(tty, 0xff, error_flag);
                                need_flip = 1;
                        }
                }
#endif
        } /* "for(packet_offset=0..." */

        /* Low latency */
        if (need_flip)
                tty_flip_buffer_push(tty);

        if (packet_offset < urb->actual_length) {
                /* not completely processed - record progress */
                priv->rx_processed = packet_offset;
                dbg("%s - incomplete, %d bytes processed, %d remain",
                                __func__, packet_offset,
                                urb->actual_length - packet_offset);
                /* check if we were throttled while processing */
                spin_lock_irqsave(&priv->rx_lock, flags);
                if (priv->rx_flags & THROTTLED) {
                        priv->rx_flags |= ACTUALLY_THROTTLED;
                        spin_unlock_irqrestore(&priv->rx_lock, flags);
                        dbg("%s - deferring remainder until unthrottled",
                                        __func__);
                        return;
                }
                spin_unlock_irqrestore(&priv->rx_lock, flags);
                /* if the port is closed stop trying to read */
                if (port->port.count > 0)
                        /* delay processing of remainder */
                        schedule_delayed_work(&priv->rx_work, 1);
                else
                        dbg("%s - port is closed", __func__);
                goto out;
        }

        /* urb is completely processed */
        priv->rx_processed = 0;

        /* if the port is closed stop trying to read */
        if (port->port.count > 0) {
                /* Continue trying to always read  */
                usb_fill_bulk_urb(port->read_urb, port->serial->dev,
                        usb_rcvbulkpipe(port->serial->dev,
                                        port->bulk_in_endpointAddress),
                        port->read_urb->transfer_buffer,
                        port->read_urb->transfer_buffer_length,
                        ftdi_read_bulk_callback, port);

                result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                if (result)
                        dev_err(&port->dev,
                                "%s - failed resubmitting read urb, error %d\n",
                                __func__, result);
        }
out:
        tty_kref_put(tty);
} /* ftdi_process_read */


static void ftdi_break_ctl(struct tty_struct *tty, int break_state)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        __u16 urb_value = 0;
        char buf[1];

        /* break_state = -1 to turn on break, and 0 to turn off break */
        /* see drivers/char/tty_io.c to see it used */
        /* last_set_data_urb_value NEVER has the break bit set in it */

        if (break_state)
                urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK;
        else
                urb_value = priv->last_set_data_urb_value;

        if (usb_control_msg(port->serial->dev,
                        usb_sndctrlpipe(port->serial->dev, 0),
                        FTDI_SIO_SET_DATA_REQUEST,
                        FTDI_SIO_SET_DATA_REQUEST_TYPE,
                        urb_value , priv->interface,
                        buf, 0, WDR_TIMEOUT) < 0) {
                dev_err(&port->dev, "%s FAILED to enable/disable break state "
                        "(state was %d)\n", __func__, break_state);
        }

        dbg("%s break state is %d - urb is %d", __func__,
                                                break_state, urb_value);

}


/* old_termios contains the original termios settings and tty->termios contains
 * the new setting to be used
 * WARNING: set_termios calls this with old_termios in kernel space
 */

static void ftdi_set_termios(struct tty_struct *tty,
                struct usb_serial_port *port, struct ktermios *old_termios)
{ /* ftdi_termios */
        struct usb_device *dev = port->serial->dev;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        struct ktermios *termios = tty->termios;
        unsigned int cflag = termios->c_cflag;
        __u16 urb_value; /* will hold the new flags */
        char buf[1]; /* Perhaps I should dynamically alloc this? */

        /* Added for xon/xoff support */
        unsigned int iflag = termios->c_iflag;
        unsigned char vstop;
        unsigned char vstart;

        dbg("%s", __func__);

        /* Force baud rate if this device requires it, unless it is set to
           B0. */
        if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) {
                dbg("%s: forcing baud rate for this device", __func__);
                tty_encode_baud_rate(tty, priv->force_baud,
                                        priv->force_baud);
        }

        /* Force RTS-CTS if this device requires it. */
        if (priv->force_rtscts) {
                dbg("%s: forcing rtscts for this device", __func__);
                termios->c_cflag |= CRTSCTS;
        }

        cflag = termios->c_cflag;

        /* FIXME -For this cut I don't care if the line is really changing or
           not  - so just do the change regardless  - should be able to
           compare old_termios and tty->termios */
        /* NOTE These routines can get interrupted by
           ftdi_sio_read_bulk_callback  - need to examine what this means -
           don't see any problems yet */

        /* Set number of data bits, parity, stop bits */

        termios->c_cflag &= ~CMSPAR;

        urb_value = 0;
        urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 :
                      FTDI_SIO_SET_DATA_STOP_BITS_1);
        urb_value |= (cflag & PARENB ?
                      (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD :
                       FTDI_SIO_SET_DATA_PARITY_EVEN) :
                      FTDI_SIO_SET_DATA_PARITY_NONE);
        if (cflag & CSIZE) {
                switch (cflag & CSIZE) {
                case CS5: urb_value |= 5; dbg("Setting CS5"); break;
                case CS6: urb_value |= 6; dbg("Setting CS6"); break;
                case CS7: urb_value |= 7; dbg("Setting CS7"); break;
                case CS8: urb_value |= 8; dbg("Setting CS8"); break;
                default:
                        dev_err(&port->dev, "CSIZE was set but not CS5-CS8\n");
                }
        }

        /* This is needed by the break command since it uses the same command
           - but is or'ed with this value  */
        priv->last_set_data_urb_value = urb_value;

        if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                            FTDI_SIO_SET_DATA_REQUEST,
                            FTDI_SIO_SET_DATA_REQUEST_TYPE,
                            urb_value , priv->interface,
                            buf, 0, WDR_SHORT_TIMEOUT) < 0) {
                dev_err(&port->dev, "%s FAILED to set "
                        "databits/stopbits/parity\n", __func__);
        }

        /* Now do the baudrate */
        if ((cflag & CBAUD) == B0) {
                /* Disable flow control */
                if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST,
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
                                    0, priv->interface,
                                    buf, 0, WDR_TIMEOUT) < 0) {
                        dev_err(&port->dev,
                                "%s error from disable flowcontrol urb\n",
                                __func__);
                }
                /* Drop RTS and DTR */
                clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
        } else {
                /* set the baudrate determined before */
                if (change_speed(tty, port))
                        dev_err(&port->dev, "%s urb failed to set baudrate\n",
                                __func__);
                /* Ensure RTS and DTR are raised when baudrate changed from 0 */
                if (!old_termios || (old_termios->c_cflag & CBAUD) == B0)
                        set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
        }

        /* Set flow control */
        /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */
        if (cflag & CRTSCTS) {
                dbg("%s Setting to CRTSCTS flow control", __func__);
                if (usb_control_msg(dev,
                                    usb_sndctrlpipe(dev, 0),
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST,
                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
                                    0 , (FTDI_SIO_RTS_CTS_HS | priv->interface),
                                    buf, 0, WDR_TIMEOUT) < 0) {
                        dev_err(&port->dev,
                                "urb failed to set to rts/cts flow control\n");
                }

        } else {
                /*
                 * Xon/Xoff code
                 *
                 * Check the IXOFF status in the iflag component of the
                 * termios structure. If IXOFF is not set, the pre-xon/xoff
                 * code is executed.
                 */
                if (iflag & IXOFF) {
                        dbg("%s  request to enable xonxoff iflag=%04x",
                                                        __func__, iflag);
                        /* Try to enable the XON/XOFF on the ftdi_sio
                         * Set the vstart and vstop -- could have been done up
                         * above where a lot of other dereferencing is done but
                         * that would be very inefficient as vstart and vstop
                         * are not always needed.
                         */
                        vstart = termios->c_cc[VSTART];
                        vstop = termios->c_cc[VSTOP];
                        urb_value = (vstop << 8) | (vstart);

                        if (usb_control_msg(dev,
                                            usb_sndctrlpipe(dev, 0),
                                            FTDI_SIO_SET_FLOW_CTRL_REQUEST,
                                            FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
                                            urb_value , (FTDI_SIO_XON_XOFF_HS
                                                         | priv->interface),
                                            buf, 0, WDR_TIMEOUT) < 0) {
                                dev_err(&port->dev, "urb failed to set to "
                                        "xon/xoff flow control\n");
                        }
                } else {
                        /* else clause to only run if cflag ! CRTSCTS and iflag
                         * ! XOFF. CHECKME Assuming XON/XOFF handled by tty
                         * stack - not by device */
                        dbg("%s Turning off hardware flow control", __func__);
                        if (usb_control_msg(dev,
                                            usb_sndctrlpipe(dev, 0),
                                            FTDI_SIO_SET_FLOW_CTRL_REQUEST,
                                            FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
                                            0, priv->interface,
                                            buf, 0, WDR_TIMEOUT) < 0) {
                                dev_err(&port->dev,
                                        "urb failed to clear flow control\n");
                        }
                }

        }
        return;
}

static int ftdi_tiocmget(struct tty_struct *tty, struct file *file)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        unsigned char buf[2];
        int ret;

        dbg("%s TIOCMGET", __func__);
        switch (priv->chip_type) {
        case SIO:
                /* Request the status from the device */
                ret = usb_control_msg(port->serial->dev,
                           usb_rcvctrlpipe(port->serial->dev, 0),
                           FTDI_SIO_GET_MODEM_STATUS_REQUEST,
                           FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
                           0, 0,
                           buf, 1, WDR_TIMEOUT);
                if (ret < 0) {
                        dbg("%s Could not get modem status of device - err: %d", __func__,
                            ret);
                        return ret;
                }
                break;
        case FT8U232AM:
        case FT232BM:
        case FT2232C:
        case FT232RL:
                /* the 8U232AM returns a two byte value (the sio is a 1 byte
                   value) - in the same format as the data returned from the in
                   point */
                ret = usb_control_msg(port->serial->dev,
                                   usb_rcvctrlpipe(port->serial->dev, 0),
                                   FTDI_SIO_GET_MODEM_STATUS_REQUEST,
                                   FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE,
                                   0, priv->interface,
                                   buf, 2, WDR_TIMEOUT);
                if (ret < 0) {
                        dbg("%s Could not get modem status of device - err: %d", __func__,
                            ret);
                        return ret;
                }
                break;
        default:
                return -EFAULT;
                break;
        }

        return  (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) |
                (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) |
                (buf[0]  & FTDI_SIO_RI_MASK  ? TIOCM_RI  : 0) |
                (buf[0]  & FTDI_SIO_RLSD_MASK ? TIOCM_CD  : 0) |
                priv->last_dtr_rts;
}

static int ftdi_tiocmset(struct tty_struct *tty, struct file *file,
                        unsigned int set, unsigned int clear)
{
        struct usb_serial_port *port = tty->driver_data;
        dbg("%s TIOCMSET", __func__);
        return update_mctrl(port, set, clear);
}


static int ftdi_ioctl(struct tty_struct *tty, struct file *file,
                                        unsigned int cmd, unsigned long arg)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);

        dbg("%s cmd 0x%04x", __func__, cmd);

        /* Based on code from acm.c and others */
        switch (cmd) {

        case TIOCGSERIAL: /* gets serial port data */
                return get_serial_info(port,
                                        (struct serial_struct __user *) arg);

        case TIOCSSERIAL: /* sets serial port data */
                return set_serial_info(tty, port,
                                        (struct serial_struct __user *) arg);

        /*
         * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
         * - mask passed in arg for lines of interest
         *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
         * Caller should use TIOCGICOUNT to see which one it was.
         *
         * This code is borrowed from linux/drivers/char/serial.c
         */
        case TIOCMIWAIT:
                while (priv != NULL) {
                        interruptible_sleep_on(&priv->delta_msr_wait);
                        /* see if a signal did it */
                        if (signal_pending(current))
                                return -ERESTARTSYS;
                        else {
                                char diff = priv->diff_status;

                                if (diff == 0)
                                        return -EIO; /* no change => error */

                                /* Consume all events */
                                priv->diff_status = 0;

                                /* Return 0 if caller wanted to know about
                                   these bits */
                                if (((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) ||
                                    ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) ||
                                    ((arg & TIOCM_CD)  && (diff & FTDI_RS0_RLSD)) ||
                                    ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS))) {
                                        return 0;
                                }
                                /*
                                 * Otherwise caller can't care less about what
                                 * happened,and so we continue to wait for more
                                 * events.
                                 */
                        }
                }
                return 0;
        default:
                break;
        }
        /* This is not necessarily an error - turns out the higher layers
         * will do some ioctls themselves (see comment above)
         */
        dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __func__, cmd);
        return -ENOIOCTLCMD;
}

static void ftdi_throttle(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        unsigned long flags;

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

        spin_lock_irqsave(&priv->rx_lock, flags);
        priv->rx_flags |= THROTTLED;
        spin_unlock_irqrestore(&priv->rx_lock, flags);
}


static void ftdi_unthrottle(struct tty_struct *tty)
{
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
        int actually_throttled;
        unsigned long flags;

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

        spin_lock_irqsave(&priv->rx_lock, flags);
        actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED;
        priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
        spin_unlock_irqrestore(&priv->rx_lock, flags);

        if (actually_throttled)
                schedule_delayed_work(&priv->rx_work, 0);
}

static int __init ftdi_init(void)
{
        int retval;

        dbg("%s", __func__);
        if (vendor > 0 && product > 0) {
                /* Add user specified VID/PID to reserved element of table. */
                int i;
                for (i = 0; id_table_combined[i].idVendor; i++)
                        ;
                id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
                id_table_combined[i].idVendor = vendor;
                id_table_combined[i].idProduct = product;
        }
        retval = usb_serial_register(&ftdi_sio_device);
        if (retval)
                goto failed_sio_register;
        retval = usb_register(&ftdi_driver);
        if (retval)
                goto failed_usb_register;

        printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
               DRIVER_DESC "\n");
        return 0;
failed_usb_register:
        usb_serial_deregister(&ftdi_sio_device);
failed_sio_register:
        return retval;
}


static void __exit ftdi_exit(void)
{

        dbg("%s", __func__);

        usb_deregister(&ftdi_driver);
        usb_serial_deregister(&ftdi_sio_device);

}


module_init(ftdi_init);
module_exit(ftdi_exit);

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

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
module_param(vendor, ushort, 0);
MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
                __MODULE_STRING(FTDI_VID)")");
module_param(product, ushort, 0);
MODULE_PARM_DESC(product, "User specified product ID");