drivers/serial/NIOSserial.h

   1 /* NIOSserial.h: Definitions for the NIOS serial driver.
   2  *
   3  * Copyright (C) 1995       David S. Miller    <davem@caip.rutgers.edu>
   4  * Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   5  * Copyright (C) 1998, 1999 D. Jeff Dionne     <jeff@rt-control.com>
   6  * Copyright (C) 1999       Vladimir Gurevich  <vgurevic@cisco.com>
   7  * Copyright (C) 2001       Vic Phillips       <vic@microtronix.com>
   8  *
   9  */
  10
  11 #ifndef _NIOS_SERIAL_H
  12 #define _NIOS_SERIAL_H
  13
  14 #include <asm/nios.h>
  15
  16 /*
  17  * For the close wait times, 0 means wait forever for serial port to
  18  * flush its output.  65535 means don't wait at all.
  19  */
  20 #define S_CLOSING_WAIT_INF      0
  21 #define S_CLOSING_WAIT_NONE     65535
  22
  23 /*
  24  * Definitions for S_struct (and serial_struct) flags field
  25  */
  26 #define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes
  27                                    on the callout port */
  28 #define S_FOURPORT  0x0002      /* Set OU1, OUT2 per AST Fourport settings */
  29 #define S_SAK   0x0004  /* Secure Attention Key (Orange book) */
  30 #define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */
  31
  32 #define S_SPD_MASK      0x0030
  33 #define S_SPD_HI        0x0010  /* Use 56000 instead of 38400 bps */
  34
  35 #define S_SPD_VHI       0x0020  /* Use 115200 instead of 38400 bps */
  36 #define S_SPD_CUST      0x0030  /* Use user-specified divisor */
  37
  38 #define S_SKIP_TEST     0x0040 /* Skip UART test during autoconfiguration */
  39 #define S_AUTO_IRQ  0x0080 /* Do automatic IRQ during autoconfiguration */
  40 #define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */
  41 #define S_PGRP_LOCKOUT    0x0200 /* Lock out cua opens based on pgrp */
  42 #define S_CALLOUT_NOHUP   0x0400 /* Don't do hangups for cua device */
  43
  44 #define S_FLAGS 0x0FFF  /* Possible legal S flags */
  45 #define S_USR_MASK 0x0430       /* Legal flags that non-privileged
  46                                  * users can set or reset */
  47
  48 /* Internal flags used only by kernel/chr_drv/serial.c */
  49 #define S_INITIALIZED   0x80000000 /* Serial port was initialized */
  50 #define S_CALLOUT_ACTIVE        0x40000000 /* Call out device is active */
  51 #define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */
  52 #define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */
  53 #define S_CLOSING               0x08000000 /* Serial port is closing */
  54 #define S_CTS_FLOW              0x04000000 /* Do CTS flow control */
  55 #define S_CHECK_CD              0x02000000 /* i.e., CLOCAL */
  56
  57 /* Software state per channel */
  58
  59 #ifdef __KERNEL__
  60
  61 /*
  62  * This is our internal structure for each serial port's state.
  63  *
  64  * Many fields are paralleled by the structure used by the serial_struct
  65  * structure.
  66  *
  67  * For definitions of the flags field, see tty.h
  68  */
  69
  70 struct NIOS_serial {
  71         char soft_carrier;  /* Use soft carrier on this channel */
  72         char break_abort;   /* Is serial console in, so process brk/abrt */
  73         char is_cons;       /* Is this our console. */
  74
  75         /* We need to know the current clock divisor
  76          * to read the bps rate the chip has currently
  77          * loaded.
  78          */
  79         unsigned char clk_divisor;  /* May be 1, 16, 32, or 64 */
  80         int baud;
  81         int                     magic;
  82         int                     baud_base;
  83         int                     port;
  84         int                     irq;
  85         int                     flags;          /* defined in tty.h */
  86         int                     type;           /* UART type */
  87         struct tty_struct       *tty;
  88         int                     read_status_mask;
  89         int                     ignore_status_mask;
  90         int                     timeout;
  91         int                     xmit_fifo_size;
  92         int                     custom_divisor;
  93         int                     x_char; /* xon/xoff character */
  94         int                     close_delay;
  95         unsigned short          closing_wait;
  96         unsigned short          closing_wait2;
  97         unsigned long           event;
  98         unsigned long           last_active;
  99         int                     line;
 100         int                     count;      /* # of fd on device */
 101         int                     blocked_open; /* # of blocked opens */
 102         long                    session; /* Session of opening process */
 103         long                    pgrp; /* pgrp of opening process */
 104         unsigned char           *xmit_buf;
 105         int                     xmit_head;
 106         int                     xmit_tail;
 107         int                     xmit_cnt;
 108         struct work_struct      tqueue;
 109         struct work_struct      tqueue_hangup;
 110         wait_queue_head_t       open_wait;
 111         wait_queue_head_t       close_wait;
 112 };
 113
 114 #define SERIAL_MAGIC 0x5301
 115
 116 /*
 117  * Events are used to schedule things to happen at timer-interrupt
 118  * time, instead of at rs interrupt time.
 119  */
 120 #define RS_EVENT_WRITE_WAKEUP   0
 121
 122 #endif /* __KERNEL__ */
 123 #endif /* !(_NIOS_SERIAL_H) */