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 <asm/page.h>
  15
  16 /*
  17  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  18  */
  19
  20 struct async_icount {
  21         __u32   cts, dsr, rng, dcd, tx, rx;
  22         __u32   frame, parity, overrun, brk;
  23         __u32   buf_overrun;
  24 };
  25
  26 /*
  27  * The size of the serial xmit buffer is 1 page, or 4096 bytes
  28  */
  29 #define SERIAL_XMIT_SIZE PAGE_SIZE
  30
  31 #endif
  32
  33 struct serial_struct {
  34         int     type;
  35         int     line;
  36         unsigned int    port;
  37         int     irq;
  38         int     flags;
  39         int     xmit_fifo_size;
  40         int     custom_divisor;
  41         int     baud_base;
  42         unsigned short  close_delay;
  43         char    io_type;
  44         char    reserved_char[1];
  45         int     hub6;
  46         unsigned short  closing_wait; /* time to wait before closing */
  47         unsigned short  closing_wait2; /* no longer used... */
  48         unsigned char   *iomem_base;
  49         unsigned short  iomem_reg_shift;
  50         unsigned int    port_high;
  51         unsigned long   iomap_base;     /* cookie passed into ioremap */
  52 };
  53
  54 /*
  55  * For the close wait times, 0 means wait forever for serial port to
  56  * flush its output.  65535 means don't wait at all.
  57  */
  58 #define ASYNC_CLOSING_WAIT_INF  0
  59 #define ASYNC_CLOSING_WAIT_NONE 65535
  60
  61 /*
  62  * These are the supported serial types.
  63  */
  64 #define PORT_UNKNOWN    0
  65 #define PORT_8250       1
  66 #define PORT_16450      2
  67 #define PORT_16550      3
  68 #define PORT_16550A     4
  69 #define PORT_CIRRUS     5       /* usurped by cyclades.c */
  70 #define PORT_16650      6
  71 #define PORT_16650V2    7
  72 #define PORT_16750      8
  73 #define PORT_STARTECH   9       /* usurped by cyclades.c */
  74 #define PORT_16C950     10      /* Oxford Semiconductor */
  75 #define PORT_16654      11
  76 #define PORT_16850      12
  77 #define PORT_RSA        13      /* RSA-DV II/S card */
  78 #define PORT_MAX        13
  79
  80 #define SERIAL_IO_PORT  0
  81 #define SERIAL_IO_HUB6  1
  82 #define SERIAL_IO_MEM   2
  83
  84 struct serial_uart_config {
  85         char    *name;
  86         int     dfl_xmit_fifo_size;
  87         int     flags;
  88 };
  89
  90 #define UART_CLEAR_FIFO         0x01
  91 #define UART_USE_FIFO           0x02
  92 #define UART_STARTECH           0x04
  93 #define UART_NATSEMI            0x08
  94
  95 /*
  96  * Definitions for async_struct (and serial_struct) flags field
  97  */
  98 #define ASYNC_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
  99                                    on the callout port */
 100 #define ASYNC_FOURPORT  0x0002  /* Set OU1, OUT2 per AST Fourport settings */
 101 #define ASYNC_SAK       0x0004  /* Secure Attention Key (Orange book) */
 102 #define ASYNC_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
 103
 104 #define ASYNC_SPD_MASK  0x1030
 105 #define ASYNC_SPD_HI    0x0010  /* Use 56000 instead of 38400 bps */
 106
 107 #define ASYNC_SPD_VHI   0x0020  /* Use 115200 instead of 38400 bps */
 108 #define ASYNC_SPD_CUST  0x0030  /* Use user-specified divisor */
 109
 110 #define ASYNC_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */
 111 #define ASYNC_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */
 112 #define ASYNC_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
 113 #define ASYNC_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
 114 #define ASYNC_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */
 115
 116 #define ASYNC_HARDPPS_CD        0x0800  /* Call hardpps when CD goes high  */
 117
 118 #define ASYNC_SPD_SHI   0x1000  /* Use 230400 instead of 38400 bps */
 119 #define ASYNC_SPD_WARP  0x1010  /* Use 460800 instead of 38400 bps */
 120
 121 #define ASYNC_LOW_LATENCY 0x2000 /* Request low latency behaviour */
 122
 123 #define ASYNC_BUGGY_UART  0x4000 /* This is a buggy UART, skip some safety
 124                                   * checks.  Note: can be dangerous! */
 125
 126 #define ASYNC_AUTOPROBE  0x8000 /* Port was autoprobed by PCI or PNP code */
 127
 128 #define ASYNC_FLAGS     0x7FFF  /* Possible legal async flags */
 129 #define ASYNC_USR_MASK  0x3430  /* Legal flags that non-privileged
 130                                  * users can set or reset */
 131
 132 /* Internal flags used only by kernel/chr_drv/serial.c */
 133 #define ASYNC_INITIALIZED       0x80000000 /* Serial port was initialized */
 134 #define ASYNC_NORMAL_ACTIVE     0x20000000 /* Normal device is active */
 135 #define ASYNC_BOOT_AUTOCONF     0x10000000 /* Autoconfigure port on bootup */
 136 #define ASYNC_CLOSING           0x08000000 /* Serial port is closing */
 137 #define ASYNC_CTS_FLOW          0x04000000 /* Do CTS flow control */
 138 #define ASYNC_CHECK_CD          0x02000000 /* i.e., CLOCAL */
 139 #define ASYNC_SHARE_IRQ         0x01000000 /* for multifunction cards
 140                                              --- no longer used */
 141 #define ASYNC_CONS_FLOW         0x00800000 /* flow control for console  */
 142
 143 #define ASYNC_BOOT_ONLYMCA      0x00400000 /* Probe only if MCA bus */
 144 #define ASYNC_INTERNAL_FLAGS    0xFFC00000 /* Internal flags */
 145
 146 /*
 147  * Multiport serial configuration structure --- external structure
 148  */
 149 struct serial_multiport_struct {
 150         int             irq;
 151         int             port1;
 152         unsigned char   mask1, match1;
 153         int             port2;
 154         unsigned char   mask2, match2;
 155         int             port3;
 156         unsigned char   mask3, match3;
 157         int             port4;
 158         unsigned char   mask4, match4;
 159         int             port_monitor;
 160         int     reserved[32];
 161 };
 162
 163 /*
 164  * Serial input interrupt line counters -- external structure
 165  * Four lines can interrupt: CTS, DSR, RI, DCD
 166  */
 167 struct serial_icounter_struct {
 168         int cts, dsr, rng, dcd;
 169         int rx, tx;
 170         int frame, overrun, parity, brk;
 171         int buf_overrun;
 172         int reserved[9];
 173 };
 174
 175
 176 #ifdef __KERNEL__
 177 /* Export to allow PCMCIA to use this - Dave Hinds */
 178 extern int register_serial(struct serial_struct *req);
 179 extern void unregister_serial(int line);
 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 */