include/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 struct serial_struct {
  14         int     type;
  15         int     line;
  16         int     port;
  17         int     irq;
  18         int     flags;
  19         int     xmit_fifo_size;
  20         int     custom_divisor;
  21         int     baud_base;
  22         unsigned short  close_delay;
  23         char    reserved_char[2];
  24         int     hub6;
  25         unsigned short  closing_wait; /* time to wait before closing */
  26         unsigned short  closing_wait2; /* no longer used... */
  27         int     reserved[4];
  28 };
  29
  30 /*
  31  * For the close wait times, 0 means wait forever for serial port to
  32  * flush its output.  65535 means don't wait at all.
  33  */
  34 #define ASYNC_CLOSING_WAIT_INF  0
  35 #define ASYNC_CLOSING_WAIT_NONE 65535
  36
  37 /*
  38  * These are the supported serial types.
  39  */
  40 #define PORT_UNKNOWN    0
  41 #define PORT_8250       1
  42 #define PORT_16450      2
  43 #define PORT_16550      3
  44 #define PORT_16550A     4
  45 #define PORT_CIRRUS     5       /* usurped by cyclades.c */
  46 #define PORT_16650      6
  47 #define PORT_16650V2    7
  48 #define PORT_16750      8
  49 #define PORT_STARTECH   9       /* usurped by cyclades.c */
  50 #define PORT_MAX        9
  51
  52 struct serial_uart_config {
  53         char    *name;
  54         int     dfl_xmit_fifo_size;
  55         int     flags;
  56 };
  57
  58 #define UART_CLEAR_FIFO         0x01
  59 #define UART_USE_FIFO           0x02
  60 #define UART_STARTECH           0x04
  61
  62 /*
  63  * Definitions for async_struct (and serial_struct) flags field
  64  */
  65 #define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
  66                                    on the callout port */
  67 #define ASYNC_FOURPORT  0x0002  /* Set OU1, OUT2 per AST Fourport settings */
  68 #define ASYNC_SAK       0x0004  /* Secure Attention Key (Orange book) */
  69 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
  70
  71 #define ASYNC_SPD_MASK  0x1030
  72 #define ASYNC_SPD_HI    0x0010  /* Use 56000 instead of 38400 bps */
  73
  74 #define ASYNC_SPD_VHI   0x0020  /* Use 115200 instead of 38400 bps */
  75 #define ASYNC_SPD_CUST  0x0030  /* Use user-specified divisor */
  76
  77 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
  78 #define ASYNC_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */
  79 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
  80 #define ASYNC_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
  81 #define ASYNC_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */
  82
  83 #define ASYNC_HARDPPS_CD        0x0800  /* Call hardpps when CD goes high  */
  84
  85 #define ASYNC_SPD_SHI   0x1000  /* Use 230400 instead of 38400 bps */
  86 #define ASYNC_SPD_WARP  0x1010  /* Use 460800 instead of 38400 bps */
  87
  88 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
  89
  90 #define ASYNC_FLAGS     0x3FFF  /* Possible legal async flags */
  91 #define ASYNC_USR_MASK  0x3430  /* Legal flags that non-privileged
  92                                  * users can set or reset */
  93
  94 /* Internal flags used only by kernel/chr_drv/serial.c */
  95 #define ASYNC_INITIALIZED       0x80000000 /* Serial port was initialized */
  96 #define ASYNC_CALLOUT_ACTIVE    0x40000000 /* Call out device is active */
  97 #define ASYNC_NORMAL_ACTIVE     0x20000000 /* Normal device is active */
  98 #define ASYNC_BOOT_AUTOCONF     0x10000000 /* Autoconfigure port on bootup */
  99 #define ASYNC_CLOSING           0x08000000 /* Serial port is closing */
 100 #define ASYNC_CTS_FLOW          0x04000000 /* Do CTS flow control */
 101 #define ASYNC_CHECK_CD          0x02000000 /* i.e., CLOCAL */
 102 #define ASYNC_SHARE_IRQ         0x01000000 /* for multifunction cards */
 103
 104 #define ASYNC_INTERNAL_FLAGS    0xFF000000 /* Internal flags */
 105
 106 /*
 107  * Multiport serial configuration structure --- external structure
 108  */
 109 struct serial_multiport_struct {
 110         int             irq;
 111         int             port1;
 112         unsigned char   mask1, match1;
 113         int             port2;
 114         unsigned char   mask2, match2;
 115         int             port3;
 116         unsigned char   mask3, match3;
 117         int             port4;
 118         unsigned char   mask4, match4;
 119         int             port_monitor;
 120         int     reserved[32];
 121 };
 122
 123 /*
 124  * Serial input interrupt line counters -- external structure
 125  * Four lines can interrupt: CTS, DSR, RI, DCD
 126  */
 127 struct serial_icounter_struct {
 128         int cts, dsr, rng, dcd;
 129         int rx, tx;
 130         int frame, overrun, parity, brk;
 131         int buf_overrun;
 132         int reserved[9];
 133 };
 134
 135
 136 #ifdef __KERNEL__
 137 /* Export to allow PCMCIA to use this - Dave Hinds */
 138 extern int register_serial(struct serial_struct *req);
 139 extern void unregister_serial(int line);
 140
 141 #endif /* __KERNEL__ */
 142 #endif /* _LINUX_SERIAL_H */