serial.h

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/*
 * include/linux/serial.h
 *
 * Copyright (C) 1992 by Theodore Ts'o.
 * 
 * Redistribution of this file is permitted under the terms of the GNU 
 * Public License (GPL)
 */

#ifndef _UAPI_LINUX_SERIAL_H
#define _UAPI_LINUX_SERIAL_H

#include <linux/types.h>

#include <linux/tty_flags.h>


struct serial_struct {
    int type;
    int line;
    unsigned int    port;
    int irq;
    int flags;
    int xmit_fifo_size;
    int custom_divisor;
    int baud_base;
    unsigned short  close_delay;
    char    io_type;
    char    reserved_char[1];
    int hub6;
    unsigned short  closing_wait; /* time to wait before closing */
    unsigned short  closing_wait2; /* no longer used... */
    unsigned char   *iomem_base;
    unsigned short  iomem_reg_shift;
    unsigned int    port_high;
    unsigned long   iomap_base; /* cookie passed into ioremap */
};

/*
 * For the close wait times, 0 means wait forever for serial port to
 * flush its output.  65535 means don't wait at all.
 */
#define ASYNC_CLOSING_WAIT_INF  0
#define ASYNC_CLOSING_WAIT_NONE 65535

/*
 * These are the supported serial types.
 */
#define PORT_UNKNOWN    0
#define PORT_8250   1
#define PORT_16450  2
#define PORT_16550  3
#define PORT_16550A 4
#define PORT_CIRRUS     5   /* usurped by cyclades.c */
#define PORT_16650  6
#define PORT_16650V2    7
#define PORT_16750  8
#define PORT_STARTECH   9   /* usurped by cyclades.c */
#define PORT_16C950 10  /* Oxford Semiconductor */
#define PORT_16654  11
#define PORT_16850  12
#define PORT_RSA    13  /* RSA-DV II/S card */
#define PORT_MAX    13

#define SERIAL_IO_PORT  0
#define SERIAL_IO_HUB6  1
#define SERIAL_IO_MEM   2

#define UART_CLEAR_FIFO     0x01
#define UART_USE_FIFO       0x02
#define UART_STARTECH       0x04
#define UART_NATSEMI        0x08


/*
 * Multiport serial configuration structure --- external structure
 */
struct serial_multiport_struct {
    int     irq;
    int     port1;
    unsigned char   mask1, match1;
    int     port2;
    unsigned char   mask2, match2;
    int     port3;
    unsigned char   mask3, match3;
    int     port4;
    unsigned char   mask4, match4;
    int     port_monitor;
    int reserved[32];
};

/*
 * Serial input interrupt line counters -- external structure
 * Four lines can interrupt: CTS, DSR, RI, DCD
 */
struct serial_icounter_struct {
    int cts, dsr, rng, dcd;
    int rx, tx;
    int frame, overrun, parity, brk;
    int buf_overrun;
    int reserved[9];
};

/*
 * Serial interface for controlling RS485 settings on chips with suitable
 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
 * platform. The set function returns the new state, with any unsupported bits
 * reverted appropriately.
 */

struct serial_rs485 {
    __u32   flags;          /* RS485 feature flags */
#define SER_RS485_ENABLED       (1 << 0)    /* If enabled */
#define SER_RS485_RTS_ON_SEND       (1 << 1)    /* Logical level for
                               RTS pin when
                               sending */
#define SER_RS485_RTS_AFTER_SEND    (1 << 2)    /* Logical level for
                               RTS pin after sent*/
#define SER_RS485_RX_DURING_TX      (1 << 4)
    __u32   delay_rts_before_send;  /* Delay before send (milliseconds) */
    __u32   delay_rts_after_send;   /* Delay after send (milliseconds) */
    __u32   padding[5];     /* Memory is cheap, new structs
                       are a royal PITA .. */
};

#endif /* _UAPI_LINUX_SERIAL_H */