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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 _LINUX_SERIAL_H

#define _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 /* _LINUX_SERIAL_H */