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 #include <linux/tty_flags.h>
  16
  17 #ifdef __KERNEL__
  18 #include <asm/page.h>
  19
  20
  21 /*
  22  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  23  */
  24
  25 struct async_icount {
  26         __u32   cts, dsr, rng, dcd, tx, rx;
  27         __u32   frame, parity, overrun, brk;
  28         __u32   buf_overrun;
  29 };
  30
  31 /*
  32  * The size of the serial xmit buffer is 1 page, or 4096 bytes
  33  */
  34 #define SERIAL_XMIT_SIZE PAGE_SIZE
  35
  36 #endif
  37
  38 struct serial_struct {
  39         int     type;
  40         int     line;
  41         unsigned int    port;
  42         int     irq;
  43         int     flags;
  44         int     xmit_fifo_size;
  45         int     custom_divisor;
  46         int     baud_base;
  47         unsigned short  close_delay;
  48         char    io_type;
  49         char    reserved_char[1];
  50         int     hub6;
  51         unsigned short  closing_wait; /* time to wait before closing */
  52         unsigned short  closing_wait2; /* no longer used... */
  53         unsigned char   *iomem_base;
  54         unsigned short  iomem_reg_shift;
  55         unsigned int    port_high;
  56         unsigned long   iomap_base;     /* cookie passed into ioremap */
  57 };
  58
  59 /*
  60  * For the close wait times, 0 means wait forever for serial port to
  61  * flush its output.  65535 means don't wait at all.
  62  */
  63 #define ASYNC_CLOSING_WAIT_INF  0
  64 #define ASYNC_CLOSING_WAIT_NONE 65535
  65
  66 /*
  67  * These are the supported serial types.
  68  */
  69 #define PORT_UNKNOWN    0
  70 #define PORT_8250       1
  71 #define PORT_16450      2
  72 #define PORT_16550      3
  73 #define PORT_16550A     4
  74 #define PORT_CIRRUS     5       /* usurped by cyclades.c */
  75 #define PORT_16650      6
  76 #define PORT_16650V2    7
  77 #define PORT_16750      8
  78 #define PORT_STARTECH   9       /* usurped by cyclades.c */
  79 #define PORT_16C950     10      /* Oxford Semiconductor */
  80 #define PORT_16654      11
  81 #define PORT_16850      12
  82 #define PORT_RSA        13      /* RSA-DV II/S card */
  83 #define PORT_MAX        13
  84
  85 #define SERIAL_IO_PORT  0
  86 #define SERIAL_IO_HUB6  1
  87 #define SERIAL_IO_MEM   2
  88
  89 #define UART_CLEAR_FIFO         0x01
  90 #define UART_USE_FIFO           0x02
  91 #define UART_STARTECH           0x04
  92 #define UART_NATSEMI            0x08
  93
  94
  95 /*
  96  * Multiport serial configuration structure --- external structure
  97  */
  98 struct serial_multiport_struct {
  99         int             irq;
 100         int             port1;
 101         unsigned char   mask1, match1;
 102         int             port2;
 103         unsigned char   mask2, match2;
 104         int             port3;
 105         unsigned char   mask3, match3;
 106         int             port4;
 107         unsigned char   mask4, match4;
 108         int             port_monitor;
 109         int     reserved[32];
 110 };
 111
 112 /*
 113  * Serial input interrupt line counters -- external structure
 114  * Four lines can interrupt: CTS, DSR, RI, DCD
 115  */
 116 struct serial_icounter_struct {
 117         int cts, dsr, rng, dcd;
 118         int rx, tx;
 119         int frame, overrun, parity, brk;
 120         int buf_overrun;
 121         int reserved[9];
 122 };
 123
 124 /*
 125  * Serial interface for controlling RS485 settings on chips with suitable
 126  * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
 127  * platform. The set function returns the new state, with any unsupported bits
 128  * reverted appropriately.
 129  */
 130
 131 struct serial_rs485 {
 132         __u32   flags;                  /* RS485 feature flags */
 133 #define SER_RS485_ENABLED               (1 << 0)        /* If enabled */
 134 #define SER_RS485_RTS_ON_SEND           (1 << 1)        /* Logical level for
 135                                                            RTS pin when
 136                                                            sending */
 137 #define SER_RS485_RTS_AFTER_SEND        (1 << 2)        /* Logical level for
 138                                                            RTS pin after sent*/
 139 #define SER_RS485_RX_DURING_TX          (1 << 4)
 140         __u32   delay_rts_before_send;  /* Delay before send (milliseconds) */
 141         __u32   delay_rts_after_send;   /* Delay after send (milliseconds) */
 142         __u32   padding[5];             /* Memory is cheap, new structs
 143                                            are a royal PITA .. */
 144 };
 145
 146 #ifdef __KERNEL__
 147 #include <linux/compiler.h>
 148
 149 #endif /* __KERNEL__ */
 150 #endif /* _LINUX_SERIAL_H */