extapi/linux/serial.h

   1 /*
   2  * include/linux/serial.h
   3  *
   4  * Copyright (C) 1992 by Theodore Ts'o.
   5  *
   6  * Redistribution of this file is permitted under the terms of the GNU
   7  * Public License (GPL)
   8  */
   9
  10 #ifndef _LINUX_SERIAL_H
  11 #define _LINUX_SERIAL_H
  12
  13 #include <linux/types.h>
  14
  15 #include "tty_flags.h"
  16
  17
  18 struct serial_struct {
  19         int     type;
  20         int     line;
  21         unsigned int    port;
  22         int     irq;
  23         int     flags;
  24         int     xmit_fifo_size;
  25         int     custom_divisor;
  26         int     baud_base;
  27         unsigned short  close_delay;
  28         char    io_type;
  29         char    reserved_char[1];
  30         int     hub6;
  31         unsigned short  closing_wait; /* time to wait before closing */
  32         unsigned short  closing_wait2; /* no longer used... */
  33         unsigned char   *iomem_base;
  34         unsigned short  iomem_reg_shift;
  35         unsigned int    port_high;
  36         unsigned long   iomap_base;     /* cookie passed into ioremap */
  37 };
  38
  39 /*
  40  * For the close wait times, 0 means wait forever for serial port to
  41  * flush its output.  65535 means don't wait at all.
  42  */
  43 #define ASYNC_CLOSING_WAIT_INF  0
  44 #define ASYNC_CLOSING_WAIT_NONE 65535
  45
  46 /*
  47  * These are the supported serial types.
  48  */
  49 #define PORT_UNKNOWN    0
  50 #define PORT_8250       1
  51 #define PORT_16450      2
  52 #define PORT_16550      3
  53 #define PORT_16550A     4
  54 #define PORT_CIRRUS     5       /* usurped by cyclades.c */
  55 #define PORT_16650      6
  56 #define PORT_16650V2    7
  57 #define PORT_16750      8
  58 #define PORT_STARTECH   9       /* usurped by cyclades.c */
  59 #define PORT_16C950     10      /* Oxford Semiconductor */
  60 #define PORT_16654      11
  61 #define PORT_16850      12
  62 #define PORT_RSA        13      /* RSA-DV II/S card */
  63 #define PORT_MAX        13
  64
  65 #define SERIAL_IO_PORT  0
  66 #define SERIAL_IO_HUB6  1
  67 #define SERIAL_IO_MEM   2
  68
  69 #define UART_CLEAR_FIFO         0x01
  70 #define UART_USE_FIFO           0x02
  71 #define UART_STARTECH           0x04
  72 #define UART_NATSEMI            0x08
  73
  74
  75 /*
  76  * Multiport serial configuration structure --- external structure
  77  */
  78 struct serial_multiport_struct {
  79         int             irq;
  80         int             port1;
  81         unsigned char   mask1, match1;
  82         int             port2;
  83         unsigned char   mask2, match2;
  84         int             port3;
  85         unsigned char   mask3, match3;
  86         int             port4;
  87         unsigned char   mask4, match4;
  88         int             port_monitor;
  89         int     reserved[32];
  90 };
  91
  92 /*
  93  * Serial input interrupt line counters -- external structure
  94  * Four lines can interrupt: CTS, DSR, RI, DCD
  95  */
  96 struct serial_icounter_struct {
  97         int cts, dsr, rng, dcd;
  98         int rx, tx;
  99         int frame, overrun, parity, brk;
 100         int buf_overrun;
 101         int reserved[9];
 102 };
 103
 104 /*
 105  * Serial interface for controlling RS485 settings on chips with suitable
 106  * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
 107  * platform. The set function returns the new state, with any unsupported bits
 108  * reverted appropriately.
 109  */
 110
 111 struct serial_rs485 {
 112         __u32   flags;                  /* RS485 feature flags */
 113 #define SER_RS485_ENABLED               (1 << 0)        /* If enabled */
 114 #define SER_RS485_RTS_ON_SEND           (1 << 1)        /* Logical level for
 115         RTS pin when
 116         sending */
 117 #define SER_RS485_RTS_AFTER_SEND        (1 << 2)        /* Logical level for
 118         RTS pin after sent*/
 119 #define SER_RS485_RX_DURING_TX          (1 << 4)
 120         __u32   delay_rts_before_send;  /* Delay before send (milliseconds) */
 121         __u32   delay_rts_after_send;   /* Delay after send (milliseconds) */
 122         __u32   padding[5];             /* Memory is cheap, new structs
 123                                            are a royal PITA .. */
 124 };
 125
 126 #endif /* _LINUX_SERIAL_H */