linux/include/linux/serial.h
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   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#ifdef __KERNEL__
  16#include <asm/page.h>
  17
  18/*
  19 * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  20 */
  21
  22struct async_icount {
  23        __u32   cts, dsr, rng, dcd, tx, rx;
  24        __u32   frame, parity, overrun, brk;
  25        __u32   buf_overrun;
  26};
  27
  28/*
  29 * The size of the serial xmit buffer is 1 page, or 4096 bytes
  30 */
  31#define SERIAL_XMIT_SIZE PAGE_SIZE
  32
  33#endif
  34
  35struct serial_struct {
  36        int     type;
  37        int     line;
  38        unsigned int    port;
  39        int     irq;
  40        int     flags;
  41        int     xmit_fifo_size;
  42        int     custom_divisor;
  43        int     baud_base;
  44        unsigned short  close_delay;
  45        char    io_type;
  46        char    reserved_char[1];
  47        int     hub6;
  48        unsigned short  closing_wait; /* time to wait before closing */
  49        unsigned short  closing_wait2; /* no longer used... */
  50        unsigned char   *iomem_base;
  51        unsigned short  iomem_reg_shift;
  52        unsigned int    port_high;
  53        unsigned long   iomap_base;     /* cookie passed into ioremap */
  54};
  55
  56/*
  57 * For the close wait times, 0 means wait forever for serial port to
  58 * flush its output.  65535 means don't wait at all.
  59 */
  60#define ASYNC_CLOSING_WAIT_INF  0
  61#define ASYNC_CLOSING_WAIT_NONE 65535
  62
  63/*
  64 * These are the supported serial types.
  65 */
  66#define PORT_UNKNOWN    0
  67#define PORT_8250       1
  68#define PORT_16450      2
  69#define PORT_16550      3
  70#define PORT_16550A     4
  71#define PORT_CIRRUS     5       /* usurped by cyclades.c */
  72#define PORT_16650      6
  73#define PORT_16650V2    7
  74#define PORT_16750      8
  75#define PORT_STARTECH   9       /* usurped by cyclades.c */
  76#define PORT_16C950     10      /* Oxford Semiconductor */
  77#define PORT_16654      11
  78#define PORT_16850      12
  79#define PORT_RSA        13      /* RSA-DV II/S card */
  80#define PORT_MAX        13
  81
  82#define SERIAL_IO_PORT  0
  83#define SERIAL_IO_HUB6  1
  84#define SERIAL_IO_MEM   2
  85
  86struct serial_uart_config {
  87        char    *name;
  88        int     dfl_xmit_fifo_size;
  89        int     flags;
  90};
  91
  92#define UART_CLEAR_FIFO         0x01
  93#define UART_USE_FIFO           0x02
  94#define UART_STARTECH           0x04
  95#define UART_NATSEMI            0x08
  96
  97/*
  98 * Definitions for async_struct (and serial_struct) flags field
  99 *
 100 * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
 101 */
 102#define ASYNCB_HUP_NOTIFY        0 /* Notify getty on hangups and closes
 103                                    * on the callout port */
 104#define ASYNCB_FOURPORT          1 /* Set OU1, OUT2 per AST Fourport settings */
 105#define ASYNCB_SAK               2 /* Secure Attention Key (Orange book) */
 106#define ASYNCB_SPLIT_TERMIOS     3 /* Separate termios for dialin/callout */
 107#define ASYNCB_SPD_HI            4 /* Use 56000 instead of 38400 bps */
 108#define ASYNCB_SPD_VHI           5 /* Use 115200 instead of 38400 bps */
 109#define ASYNCB_SKIP_TEST         6 /* Skip UART test during autoconfiguration */
 110#define ASYNCB_AUTO_IRQ          7 /* Do automatic IRQ during
 111                                    * autoconfiguration */
 112#define ASYNCB_SESSION_LOCKOUT   8 /* Lock out cua opens based on session */
 113#define ASYNCB_PGRP_LOCKOUT      9 /* Lock out cua opens based on pgrp */
 114#define ASYNCB_CALLOUT_NOHUP    10 /* Don't do hangups for cua device */
 115#define ASYNCB_HARDPPS_CD       11 /* Call hardpps when CD goes high  */
 116#define ASYNCB_SPD_SHI          12 /* Use 230400 instead of 38400 bps */
 117#define ASYNCB_LOW_LATENCY      13 /* Request low latency behaviour */
 118#define ASYNCB_BUGGY_UART       14 /* This is a buggy UART, skip some safety
 119                                    * checks.  Note: can be dangerous! */
 120#define ASYNCB_AUTOPROBE        15 /* Port was autoprobed by PCI or PNP code */
 121#define ASYNCB_LAST_USER        15
 122
 123/* Internal flags used only by kernel */
 124#define ASYNCB_INITIALIZED      31 /* Serial port was initialized */
 125#define ASYNCB_SUSPENDED        30 /* Serial port is suspended */
 126#define ASYNCB_NORMAL_ACTIVE    29 /* Normal device is active */
 127#define ASYNCB_BOOT_AUTOCONF    28 /* Autoconfigure port on bootup */
 128#define ASYNCB_CLOSING          27 /* Serial port is closing */
 129#define ASYNCB_CTS_FLOW         26 /* Do CTS flow control */
 130#define ASYNCB_CHECK_CD         25 /* i.e., CLOCAL */
 131#define ASYNCB_SHARE_IRQ        24 /* for multifunction cards, no longer used */
 132#define ASYNCB_CONS_FLOW        23 /* flow control for console  */
 133#define ASYNCB_FIRST_KERNEL     22
 134
 135#define ASYNC_HUP_NOTIFY        (1U << ASYNCB_HUP_NOTIFY)
 136#define ASYNC_SUSPENDED         (1U << ASYNCB_SUSPENDED)
 137#define ASYNC_FOURPORT          (1U << ASYNCB_FOURPORT)
 138#define ASYNC_SAK               (1U << ASYNCB_SAK)
 139#define ASYNC_SPLIT_TERMIOS     (1U << ASYNCB_SPLIT_TERMIOS)
 140#define ASYNC_SPD_HI            (1U << ASYNCB_SPD_HI)
 141#define ASYNC_SPD_VHI           (1U << ASYNCB_SPD_VHI)
 142#define ASYNC_SKIP_TEST         (1U << ASYNCB_SKIP_TEST)
 143#define ASYNC_AUTO_IRQ          (1U << ASYNCB_AUTO_IRQ)
 144#define ASYNC_SESSION_LOCKOUT   (1U << ASYNCB_SESSION_LOCKOUT)
 145#define ASYNC_PGRP_LOCKOUT      (1U << ASYNCB_PGRP_LOCKOUT)
 146#define ASYNC_CALLOUT_NOHUP     (1U << ASYNCB_CALLOUT_NOHUP)
 147#define ASYNC_HARDPPS_CD        (1U << ASYNCB_HARDPPS_CD)
 148#define ASYNC_SPD_SHI           (1U << ASYNCB_SPD_SHI)
 149#define ASYNC_LOW_LATENCY       (1U << ASYNCB_LOW_LATENCY)
 150#define ASYNC_BUGGY_UART        (1U << ASYNCB_BUGGY_UART)
 151#define ASYNC_AUTOPROBE         (1U << ASYNCB_AUTOPROBE)
 152
 153#define ASYNC_FLAGS             ((1U << (ASYNCB_LAST_USER + 1)) - 1)
 154#define ASYNC_USR_MASK          (ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \
 155                ASYNC_LOW_LATENCY)
 156#define ASYNC_SPD_CUST          (ASYNC_SPD_HI|ASYNC_SPD_VHI)
 157#define ASYNC_SPD_WARP          (ASYNC_SPD_HI|ASYNC_SPD_SHI)
 158#define ASYNC_SPD_MASK          (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
 159
 160#define ASYNC_INITIALIZED       (1U << ASYNCB_INITIALIZED)
 161#define ASYNC_NORMAL_ACTIVE     (1U << ASYNCB_NORMAL_ACTIVE)
 162#define ASYNC_BOOT_AUTOCONF     (1U << ASYNCB_BOOT_AUTOCONF)
 163#define ASYNC_CLOSING           (1U << ASYNCB_CLOSING)
 164#define ASYNC_CTS_FLOW          (1U << ASYNCB_CTS_FLOW)
 165#define ASYNC_CHECK_CD          (1U << ASYNCB_CHECK_CD)
 166#define ASYNC_SHARE_IRQ         (1U << ASYNCB_SHARE_IRQ)
 167#define ASYNC_CONS_FLOW         (1U << ASYNCB_CONS_FLOW)
 168#define ASYNC_INTERNAL_FLAGS    (~((1U << ASYNCB_FIRST_KERNEL) - 1))
 169
 170/*
 171 * Multiport serial configuration structure --- external structure
 172 */
 173struct serial_multiport_struct {
 174        int             irq;
 175        int             port1;
 176        unsigned char   mask1, match1;
 177        int             port2;
 178        unsigned char   mask2, match2;
 179        int             port3;
 180        unsigned char   mask3, match3;
 181        int             port4;
 182        unsigned char   mask4, match4;
 183        int             port_monitor;
 184        int     reserved[32];
 185};
 186
 187/*
 188 * Serial input interrupt line counters -- external structure
 189 * Four lines can interrupt: CTS, DSR, RI, DCD
 190 */
 191struct serial_icounter_struct {
 192        int cts, dsr, rng, dcd;
 193        int rx, tx;
 194        int frame, overrun, parity, brk;
 195        int buf_overrun;
 196        int reserved[9];
 197};
 198
 199/*
 200 * Serial interface for controlling RS485 settings on chips with suitable
 201 * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
 202 * platform. The set function returns the new state, with any unsupported bits
 203 * reverted appropriately.
 204 */
 205
 206struct serial_rs485 {
 207        __u32   flags;                  /* RS485 feature flags */
 208#define SER_RS485_ENABLED               (1 << 0)        /* If enabled */
 209#define SER_RS485_RTS_ON_SEND           (1 << 1)        /* Logical level for
 210                                                           RTS pin when
 211                                                           sending */
 212#define SER_RS485_RTS_AFTER_SEND        (1 << 2)        /* Logical level for
 213                                                           RTS pin after sent*/
 214#define SER_RS485_RX_DURING_TX          (1 << 4)
 215        __u32   delay_rts_before_send;  /* Delay before send (milliseconds) */
 216        __u32   delay_rts_after_send;   /* Delay after send (milliseconds) */
 217        __u32   padding[5];             /* Memory is cheap, new structs
 218                                           are a royal PITA .. */
 219};
 220
 221#ifdef __KERNEL__
 222#include <linux/compiler.h>
 223
 224#endif /* __KERNEL__ */
 225#endif /* _LINUX_SERIAL_H */
 226
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