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 #ifdef __KERNEL__
  14 #include <linux/types.h>
  15 #include <asm/page.h>
  16
  17 /*
  18  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  19  */
  20
  21 struct async_icount {
  22         __u32   cts, dsr, rng, dcd, tx, rx;
  23         __u32   frame, parity, overrun, brk;
  24         __u32   buf_overrun;
  25 };
  26
  27 /*
  28  * The size of the serial xmit buffer is 1 page, or 4096 bytes
  29  */
  30 #define SERIAL_XMIT_SIZE PAGE_SIZE
  31
  32 #endif
  33
  34 struct serial_struct {
  35         int     type;
  36         int     line;
  37         unsigned int    port;
  38         int     irq;
  39         int     flags;
  40         int     xmit_fifo_size;
  41         int     custom_divisor;
  42         int     baud_base;
  43         unsigned short  close_delay;
  44         char    io_type;
  45         char    reserved_char[1];
  46         int     hub6;
  47         unsigned short  closing_wait; /* time to wait before closing */
  48         unsigned short  closing_wait2; /* no longer used... */
  49         unsigned char   *iomem_base;
  50         unsigned short  iomem_reg_shift;
  51         unsigned int    port_high;
  52         unsigned long   iomap_base;     /* cookie passed into ioremap */
  53 };
  54
  55 /*
  56  * For the close wait times, 0 means wait forever for serial port to
  57  * flush its output.  65535 means don't wait at all.
  58  */
  59 #define ASYNC_CLOSING_WAIT_INF  0
  60 #define ASYNC_CLOSING_WAIT_NONE 65535
  61
  62 /*
  63  * These are the supported serial types.
  64  */
  65 #define PORT_UNKNOWN    0
  66 #define PORT_8250       1
  67 #define PORT_16450      2
  68 #define PORT_16550      3
  69 #define PORT_16550A     4
  70 #define PORT_CIRRUS     5       /* usurped by cyclades.c */
  71 #define PORT_16650      6
  72 #define PORT_16650V2    7
  73 #define PORT_16750      8
  74 #define PORT_STARTECH   9       /* usurped by cyclades.c */
  75 #define PORT_16C950     10      /* Oxford Semiconductor */
  76 #define PORT_16654      11
  77 #define PORT_16850      12
  78 #define PORT_RSA        13      /* RSA-DV II/S card */
  79 #define PORT_MAX        13
  80
  81 #define SERIAL_IO_PORT  0
  82 #define SERIAL_IO_HUB6  1
  83 #define SERIAL_IO_MEM   2
  84 #define SERIAL_IO_MEM32 3
  85
  86 struct 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 ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
 101                                    on the callout port */
 102 #define ASYNC_FOURPORT  0x0002  /* Set OU1, OUT2 per AST Fourport settings */
 103 #define ASYNC_SAK       0x0004  /* Secure Attention Key (Orange book) */
 104 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
 105
 106 #define ASYNC_SPD_MASK  0x1030
 107 #define ASYNC_SPD_HI    0x0010  /* Use 56000 instead of 38400 bps */
 108
 109 #define ASYNC_SPD_VHI   0x0020  /* Use 115200 instead of 38400 bps */
 110 #define ASYNC_SPD_CUST  0x0030  /* Use user-specified divisor */
 111
 112 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
 113 #define ASYNC_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */
 114 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
 115 #define ASYNC_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
 116 #define ASYNC_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */
 117
 118 #define ASYNC_HARDPPS_CD        0x0800  /* Call hardpps when CD goes high  */
 119
 120 #define ASYNC_SPD_SHI   0x1000  /* Use 230400 instead of 38400 bps */
 121 #define ASYNC_SPD_WARP  0x1010  /* Use 460800 instead of 38400 bps */
 122
 123 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
 124
 125 #define ASYNC_BUGGY_UART  0x4000 /* This is a buggy UART, skip some safety
 126                                   * checks.  Note: can be dangerous! */
 127
 128 #define ASYNC_AUTOPROBE  0x8000 /* Port was autoprobed by PCI or PNP code */
 129
 130 #define ASYNC_FLAGS     0x7FFF  /* Possible legal async flags */
 131 #define ASYNC_USR_MASK  0x3430  /* Legal flags that non-privileged
 132                                  * users can set or reset */
 133
 134 /* Internal flags used only by kernel/chr_drv/serial.c */
 135 #define ASYNC_INITIALIZED       0x80000000 /* Serial port was initialized */
 136 #define ASYNC_NORMAL_ACTIVE     0x20000000 /* Normal device is active */
 137 #define ASYNC_BOOT_AUTOCONF     0x10000000 /* Autoconfigure port on bootup */
 138 #define ASYNC_CLOSING           0x08000000 /* Serial port is closing */
 139 #define ASYNC_CTS_FLOW          0x04000000 /* Do CTS flow control */
 140 #define ASYNC_CHECK_CD          0x02000000 /* i.e., CLOCAL */
 141 #define ASYNC_SHARE_IRQ         0x01000000 /* for multifunction cards
 142                                              --- no longer used */
 143 #define ASYNC_CONS_FLOW         0x00800000 /* flow control for console  */
 144
 145 #define ASYNC_BOOT_ONLYMCA      0x00400000 /* Probe only if MCA bus */
 146 #define ASYNC_INTERNAL_FLAGS    0xFFC00000 /* Internal flags */
 147
 148 /*
 149  * Multiport serial configuration structure --- external structure
 150  */
 151 struct serial_multiport_struct {
 152         int             irq;
 153         int             port1;
 154         unsigned char   mask1, match1;
 155         int             port2;
 156         unsigned char   mask2, match2;
 157         int             port3;
 158         unsigned char   mask3, match3;
 159         int             port4;
 160         unsigned char   mask4, match4;
 161         int             port_monitor;
 162         int     reserved[32];
 163 };
 164
 165 /*
 166  * Serial input interrupt line counters -- external structure
 167  * Four lines can interrupt: CTS, DSR, RI, DCD
 168  */
 169 struct serial_icounter_struct {
 170         int cts, dsr, rng, dcd;
 171         int rx, tx;
 172         int frame, overrun, parity, brk;
 173         int buf_overrun;
 174         int reserved[9];
 175 };
 176
 177
 178 #ifdef __KERNEL__
 179 #include <linux/compiler.h>
 180
 181 /* Allow architectures to override entries in serial8250_ports[] at run time: */
 182 struct uart_port;       /* forward declaration */
 183 extern int early_serial_setup(struct uart_port *port);
 184 extern int early_serial_console_init(char *options);
 185 extern int serial8250_start_console(struct uart_port *port, char *options);
 186
 187 #endif /* __KERNEL__ */
 188 #endif /* _LINUX_SERIAL_H */