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 #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
  22 struct 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
  35 struct 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_U6_16550A  14
  81 #define PORT_MAX        14
  82
  83 #define SERIAL_IO_PORT  0
  84 #define SERIAL_IO_HUB6  1
  85 #define SERIAL_IO_MEM   2
  86
  87 struct serial_uart_config {
  88         char    *name;
  89         int     dfl_xmit_fifo_size;
  90         int     flags;
  91 };
  92
  93 #define UART_CLEAR_FIFO         0x01
  94 #define UART_USE_FIFO           0x02
  95 #define UART_STARTECH           0x04
  96 #define UART_NATSEMI            0x08
  97
  98 /*
  99  * Definitions for async_struct (and serial_struct) flags field
 100  *
 101  * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
 102  */
 103 #define ASYNCB_HUP_NOTIFY        0 /* Notify getty on hangups and closes
 104                                     * on the callout port */
 105 #define ASYNCB_FOURPORT          1 /* Set OU1, OUT2 per AST Fourport settings */
 106 #define ASYNCB_SAK               2 /* Secure Attention Key (Orange book) */
 107 #define ASYNCB_SPLIT_TERMIOS     3 /* Separate termios for dialin/callout */
 108 #define ASYNCB_SPD_HI            4 /* Use 56000 instead of 38400 bps */
 109 #define ASYNCB_SPD_VHI           5 /* Use 115200 instead of 38400 bps */
 110 #define ASYNCB_SKIP_TEST         6 /* Skip UART test during autoconfiguration */
 111 #define ASYNCB_AUTO_IRQ          7 /* Do automatic IRQ during
 112                                     * autoconfiguration */
 113 #define ASYNCB_SESSION_LOCKOUT   8 /* Lock out cua opens based on session */
 114 #define ASYNCB_PGRP_LOCKOUT      9 /* Lock out cua opens based on pgrp */
 115 #define ASYNCB_CALLOUT_NOHUP    10 /* Don't do hangups for cua device */
 116 #define ASYNCB_HARDPPS_CD       11 /* Call hardpps when CD goes high  */
 117 #define ASYNCB_SPD_SHI          12 /* Use 230400 instead of 38400 bps */
 118 #define ASYNCB_LOW_LATENCY      13 /* Request low latency behaviour */
 119 #define ASYNCB_BUGGY_UART       14 /* This is a buggy UART, skip some safety
 120                                     * checks.  Note: can be dangerous! */
 121 #define ASYNCB_AUTOPROBE        15 /* Port was autoprobed by PCI or PNP code */
 122 #define ASYNCB_LAST_USER        15
 123
 124 /* Internal flags used only by kernel */
 125 #define ASYNCB_INITIALIZED      31 /* Serial port was initialized */
 126 #define ASYNCB_SUSPENDED        30 /* Serial port is suspended */
 127 #define ASYNCB_NORMAL_ACTIVE    29 /* Normal device is active */
 128 #define ASYNCB_BOOT_AUTOCONF    28 /* Autoconfigure port on bootup */
 129 #define ASYNCB_CLOSING          27 /* Serial port is closing */
 130 #define ASYNCB_CTS_FLOW         26 /* Do CTS flow control */
 131 #define ASYNCB_CHECK_CD         25 /* i.e., CLOCAL */
 132 #define ASYNCB_SHARE_IRQ        24 /* for multifunction cards, no longer used */
 133 #define ASYNCB_CONS_FLOW        23 /* flow control for console  */
 134 #define ASYNCB_BOOT_ONLYMCA     22 /* Probe only if MCA bus */
 135 #define ASYNCB_FIRST_KERNEL     22
 136
 137 #define ASYNC_HUP_NOTIFY        (1U << ASYNCB_HUP_NOTIFY)
 138 #define ASYNC_SUSPENDED         (1U << ASYNCB_SUSPENDED)
 139 #define ASYNC_FOURPORT          (1U << ASYNCB_FOURPORT)
 140 #define ASYNC_SAK               (1U << ASYNCB_SAK)
 141 #define ASYNC_SPLIT_TERMIOS     (1U << ASYNCB_SPLIT_TERMIOS)
 142 #define ASYNC_SPD_HI            (1U << ASYNCB_SPD_HI)
 143 #define ASYNC_SPD_VHI           (1U << ASYNCB_SPD_VHI)
 144 #define ASYNC_SKIP_TEST         (1U << ASYNCB_SKIP_TEST)
 145 #define ASYNC_AUTO_IRQ          (1U << ASYNCB_AUTO_IRQ)
 146 #define ASYNC_SESSION_LOCKOUT   (1U << ASYNCB_SESSION_LOCKOUT)
 147 #define ASYNC_PGRP_LOCKOUT      (1U << ASYNCB_PGRP_LOCKOUT)
 148 #define ASYNC_CALLOUT_NOHUP     (1U << ASYNCB_CALLOUT_NOHUP)
 149 #define ASYNC_HARDPPS_CD        (1U << ASYNCB_HARDPPS_CD)
 150 #define ASYNC_SPD_SHI           (1U << ASYNCB_SPD_SHI)
 151 #define ASYNC_LOW_LATENCY       (1U << ASYNCB_LOW_LATENCY)
 152 #define ASYNC_BUGGY_UART        (1U << ASYNCB_BUGGY_UART)
 153 #define ASYNC_AUTOPROBE         (1U << ASYNCB_AUTOPROBE)
 154
 155 #define ASYNC_FLAGS             ((1U << (ASYNCB_LAST_USER + 1)) - 1)
 156 #define ASYNC_USR_MASK          (ASYNC_SPD_HI|ASYNC_SPD_VHI| \
 157                 ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY)
 158 #define ASYNC_SPD_CUST          (ASYNC_SPD_HI|ASYNC_SPD_VHI)
 159 #define ASYNC_SPD_WARP          (ASYNC_SPD_HI|ASYNC_SPD_SHI)
 160 #define ASYNC_SPD_MASK          (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
 161
 162 #define ASYNC_INITIALIZED       (1U << ASYNCB_INITIALIZED)
 163 #define ASYNC_NORMAL_ACTIVE     (1U << ASYNCB_NORMAL_ACTIVE)
 164 #define ASYNC_BOOT_AUTOCONF     (1U << ASYNCB_BOOT_AUTOCONF)
 165 #define ASYNC_CLOSING           (1U << ASYNCB_CLOSING)
 166 #define ASYNC_CTS_FLOW          (1U << ASYNCB_CTS_FLOW)
 167 #define ASYNC_CHECK_CD          (1U << ASYNCB_CHECK_CD)
 168 #define ASYNC_SHARE_IRQ         (1U << ASYNCB_SHARE_IRQ)
 169 #define ASYNC_CONS_FLOW         (1U << ASYNCB_CONS_FLOW)
 170 #define ASYNC_BOOT_ONLYMCA      (1U << ASYNCB_BOOT_ONLYMCA)
 171 #define ASYNC_INTERNAL_FLAGS    (~((1U << ASYNCB_FIRST_KERNEL) - 1))
 172
 173 /*
 174  * Multiport serial configuration structure --- external structure
 175  */
 176 struct serial_multiport_struct {
 177         int             irq;
 178         int             port1;
 179         unsigned char   mask1, match1;
 180         int             port2;
 181         unsigned char   mask2, match2;
 182         int             port3;
 183         unsigned char   mask3, match3;
 184         int             port4;
 185         unsigned char   mask4, match4;
 186         int             port_monitor;
 187         int     reserved[32];
 188 };
 189
 190 /*
 191  * Serial input interrupt line counters -- external structure
 192  * Four lines can interrupt: CTS, DSR, RI, DCD
 193  */
 194 struct serial_icounter_struct {
 195         int cts, dsr, rng, dcd;
 196         int rx, tx;
 197         int frame, overrun, parity, brk;
 198         int buf_overrun;
 199         int reserved[9];
 200 };
 201
 202 /*
 203  * Serial interface for controlling RS485 settings on chips with suitable
 204  * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
 205  * platform. The set function returns the new state, with any unsupported bits
 206  * reverted appropriately.
 207  */
 208
 209 struct serial_rs485 {
 210         __u32   flags;                  /* RS485 feature flags */
 211 #define SER_RS485_ENABLED               (1 << 0)
 212 #define SER_RS485_RTS_ON_SEND           (1 << 1)
 213 #define SER_RS485_RTS_AFTER_SEND        (1 << 2)
 214 #define SER_RS485_RTS_BEFORE_SEND       (1 << 3)
 215         __u32   delay_rts_before_send;  /* Milliseconds */
 216         __u32   delay_rts_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 */