/*
   *  generic_serial.h
   *
   *  Copyright (C) 1998 R.E.Wolff@BitWizard.nl
   *
   *  written for the SX serial driver.
   *     Contains the code that should be shared over all the serial drivers.
   *
   *  Version 0.1 -- December, 1998.
   */
  
  #ifndef GENERIC_SERIAL_H
  #define GENERIC_SERIAL_H

  #ifdef __KERNEL__

  #include <linux/mutex.h>

  struct real_driver {
    void                    (*disable_tx_interrupts) (void *);
    void                    (*enable_tx_interrupts) (void *);
    void                    (*disable_rx_interrupts) (void *);
    void                    (*enable_rx_interrupts) (void *);
    int                     (*get_CD) (void *);
    void                    (*shutdown_port) (void*);
    int                     (*set_real_termios) (void*);
    int                     (*chars_in_buffer) (void*);
    void                    (*close) (void*);
    void                    (*hungup) (void*);
    void                    (*getserial) (void*, struct serial_struct *sp);
  };
  
  
  
  struct gs_port {
    int                     magic;
    unsigned char           *xmit_buf; 
    int                     xmit_head;
    int                     xmit_tail;
    int                     xmit_cnt;

    struct mutex            port_write_mutex;

    int                     flags;
    wait_queue_head_t       open_wait;
    wait_queue_head_t       close_wait;
    int                     count;
    int                     blocked_open;
    struct tty_struct       *tty;
    unsigned long           event;
    unsigned short          closing_wait;
    int                     close_delay;
    struct real_driver      *rd;
    int                     wakeup_chars;
    int                     baud_base;
    int                     baud;
    int                     custom_divisor;
    spinlock_t              driver_lock;
  };

  #endif /* __KERNEL__ */

  
  /* Flags */
  /* Warning: serial.h defines some ASYNC_ flags, they say they are "only"
     used in serial.c, but they are also used in all other serial drivers. 
     Make sure they don't clash with these here... */
  #define GS_TX_INTEN      0x00800000
  #define GS_RX_INTEN      0x00400000
  #define GS_ACTIVE        0x00200000
  
  
  
  #define GS_TYPE_NORMAL   1
  
  #define GS_DEBUG_FLUSH   0x00000001
  #define GS_DEBUG_BTR     0x00000002
  #define GS_DEBUG_TERMIOS 0x00000004
  #define GS_DEBUG_STUFF   0x00000008
  #define GS_DEBUG_CLOSE   0x00000010
  #define GS_DEBUG_FLOW    0x00000020
  #define GS_DEBUG_WRITE   0x00000040

  #ifdef __KERNEL__

  void gs_put_char(struct tty_struct *tty, unsigned char ch);
  int  gs_write(struct tty_struct *tty, 
               const unsigned char *buf, int count);
  int  gs_write_room(struct tty_struct *tty);
  int  gs_chars_in_buffer(struct tty_struct *tty);
  void gs_flush_buffer(struct tty_struct *tty);
  void gs_flush_chars(struct tty_struct *tty);
  void gs_stop(struct tty_struct *tty);
  void gs_start(struct tty_struct *tty);
  void gs_hangup(struct tty_struct *tty);
  int  gs_block_til_ready(void *port, struct file *filp);
  void gs_close(struct tty_struct *tty, struct file *filp);
  void gs_set_termios (struct tty_struct * tty, 

                       struct ktermios * old_termios);

  int  gs_init_port(struct gs_port *port);
  int  gs_setserial(struct gs_port *port, struct serial_struct __user *sp);
  int  gs_getserial(struct gs_port *port, struct serial_struct __user *sp);
  void gs_got_break(struct gs_port *port);

  #endif /* __KERNEL__ */

  #endif