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/*

 *  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