include/linux/serialP.h

   1 /*
   2  * Private header file for the (dumb) serial driver
   3  *
   4  * Copyright (C) 1997 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_SERIALP_H
  11 #define _LINUX_SERIALP_H
  12
  13 /*
  14  * This is our internal structure for each serial port's state.
  15  *
  16  * Many fields are paralleled by the structure used by the serial_struct
  17  * structure.
  18  *
  19  * For definitions of the flags field, see tty.h
  20  */
  21
  22 #include <linux/termios.h>
  23 #include <linux/tqueue.h>
  24
  25 /*
  26  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  27  */
  28 struct async_icount {
  29         __u32   cts, dsr, rng, dcd, tx, rx;
  30         __u32   frame, parity, overrun, brk;
  31         __u32   buf_overrun;
  32 };
  33
  34 struct serial_state {
  35         int     magic;
  36         int     baud_base;
  37         int     port;
  38         int     irq;
  39         int     flags;
  40         int     hub6;
  41         int     type;
  42         int     line;
  43         int     xmit_fifo_size;
  44         int     custom_divisor;
  45         int     count;
  46         unsigned short  close_delay;
  47         unsigned short  closing_wait; /* time to wait before closing */
  48         struct async_icount     icount;
  49         struct termios          normal_termios;
  50         struct termios          callout_termios;
  51         struct async_struct *info;
  52 };
  53
  54 struct async_struct {
  55         int                     magic;
  56         int                     port;
  57         int                     hub6;
  58         int                     flags;
  59         int                     xmit_fifo_size;
  60         struct serial_state     *state;
  61         struct tty_struct       *tty;
  62         int                     read_status_mask;
  63         int                     ignore_status_mask;
  64         int                     timeout;
  65         int                     quot;
  66         int                     x_char; /* xon/xoff character */
  67         int                     close_delay;
  68         unsigned short          closing_wait;
  69         unsigned short          closing_wait2;
  70         int                     IER;    /* Interrupt Enable Register */
  71         int                     MCR;    /* Modem control register */
  72         unsigned long           event;
  73         unsigned long           last_active;
  74         int                     line;
  75         int                     blocked_open; /* # of blocked opens */
  76         long                    session; /* Session of opening process */
  77         long                    pgrp; /* pgrp of opening process */
  78         unsigned char           *xmit_buf;
  79         int                     xmit_head;
  80         int                     xmit_tail;
  81         int                     xmit_cnt;
  82         struct tq_struct        tqueue;
  83         wait_queue_head_t       open_wait;
  84         wait_queue_head_t       close_wait;
  85         wait_queue_head_t       delta_msr_wait;
  86         struct async_struct     *next_port; /* For the linked list */
  87         struct async_struct     *prev_port;
  88 };
  89
  90 #define SERIAL_MAGIC 0x5301
  91 #define SSTATE_MAGIC 0x5302
  92
  93 /*
  94  * The size of the serial xmit buffer is 1 page, or 4096 bytes
  95  */
  96 #define SERIAL_XMIT_SIZE 4096
  97
  98 /*
  99  * Events are used to schedule things to happen at timer-interrupt
 100  * time, instead of at rs interrupt time.
 101  */
 102 #define RS_EVENT_WRITE_WAKEUP   0
 103
 104 /*
 105  * Multiport serial configuration structure --- internal structure
 106  */
 107 struct rs_multiport_struct {
 108         int             port1;
 109         unsigned char   mask1, match1;
 110         int             port2;
 111         unsigned char   mask2, match2;
 112         int             port3;
 113         unsigned char   mask3, match3;
 114         int             port4;
 115         unsigned char   mask4, match4;
 116         int             port_monitor;
 117 };
 118
 119 #endif /* _LINUX_SERIAL_H */