sys/arch/prep/stand/boot/kbd.c

   1 /*      $NetBSD: kbd.c,v 1.2 2006/04/10 17:58:59 garbled Exp $  */
   2
   3 /*-
   4  * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Gary Thomas.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifdef CONS_VGA
  34 #include <lib/libsa/stand.h>
  35 #include "boot.h"
  36
  37 /*
  38  * Keyboard handler
  39  */
  40 #define L               0x0001  /* locking function */
  41 #define SHF             0x0002  /* keyboard shift */
  42 #define ALT             0x0004  /* alternate shift -- alternate chars */
  43 #define NUM             0x0008  /* numeric shift  cursors vs. numeric */
  44 #define CTL             0x0010  /* control shift  -- allows ctl function */
  45 #define CPS             0x0020  /* caps shift -- swaps case of letter */
  46 #define ASCII           0x0040  /* ascii code for this key */
  47 #define STP             0x0080  /* stop output */
  48 #define FUNC            0x0100  /* function key */
  49 #define SCROLL          0x0200  /* scroll lock key */
  50
  51 #include "pcconstab.US"
  52
  53 u_char shfts, ctls, alts, caps, num, stp;
  54
  55 #define KBDATAP         0x60    /* kbd data port */
  56 #define KBSTATUSPORT    0x61    /* kbd status */
  57 #define KBSTATP         0x64    /* kbd status port */
  58 #define KBINRDY         0x01
  59 #define KBOUTRDY        0x02
  60
  61 #define _x__ 0x00  /* Unknown / unmapped */
  62
  63 const u_char keycode[] = {
  64         _x__, 0x43, 0x41, 0x3F, 0x3D, 0x3B, 0x3C, _x__, /* 0x00-0x07 */
  65         _x__, 0x44, 0x42, 0x40, 0x3E, 0x0F, 0x29, _x__, /* 0x08-0x0F */
  66         _x__, 0x38, 0x2A, _x__, 0x1D, 0x10, 0x02, _x__, /* 0x10-0x17 */
  67         _x__, _x__, 0x2C, 0x1F, 0x1E, 0x11, 0x03, _x__, /* 0x18-0x1F */
  68         _x__, 0x2E, 0x2D, 0x20, 0x12, 0x05, 0x04, _x__, /* 0x20-0x27 */
  69         _x__, 0x39, 0x2F, 0x21, 0x14, 0x13, 0x06, _x__, /* 0x28-0x2F */
  70         _x__, 0x31, 0x30, 0x23, 0x22, 0x15, 0x07, _x__, /* 0x30-0x37 */
  71         _x__, _x__, 0x32, 0x24, 0x16, 0x08, 0x09, _x__, /* 0x38-0x3F */
  72         _x__, 0x33, 0x25, 0x17, 0x18, 0x0B, 0x0A, _x__, /* 0x40-0x47 */
  73         _x__, 0x34, 0x35, 0x26, 0x27, 0x19, 0x0C, _x__, /* 0x48-0x4F */
  74         _x__, _x__, 0x28, _x__, 0x1A, 0x0D, _x__, _x__, /* 0x50-0x57 */
  75         0x3A, 0x36, 0x1C, 0x1B, _x__, 0x2B, _x__, _x__, /* 0x58-0x5F */
  76         _x__, _x__, _x__, _x__, _x__, _x__, 0x0E, _x__, /* 0x60-0x67 */
  77         _x__, 0x4F, _x__, 0x4B, 0x47, _x__, _x__, _x__, /* 0x68-0x6F */
  78         0x52, 0x53, 0x50, 0x4C, 0x4D, 0x48, 0x01, 0x45, /* 0x70-0x77 */
  79         _x__, 0x4E, 0x51, 0x4A, _x__, 0x49, 0x46, 0x54, /* 0x78-0x7F */
  80 };
  81
  82 int
  83 kbd(int noblock)
  84 {
  85         u_char dt, brk, act;
  86         int first = 1;
  87
  88 loop:
  89         if (noblock) {
  90                 if ((inb(KBSTATP) & KBINRDY) == 0)
  91                         return (-1);
  92         } else while ((inb(KBSTATP) & KBINRDY) == 0)
  93                 ;
  94
  95         dt = inb(KBDATAP);
  96
  97         brk = dt & 0x80;        /* brk == 1 on key release */
  98         dt = dt & 0x7f;         /* keycode */
  99
 100         act = action[dt];
 101         if (act & SHF)
 102                 shfts = brk ? 0 : 1;
 103         if (act & ALT)
 104                 alts = brk ? 0 : 1;
 105         if (act & NUM) {
 106                 if (act & L) {
 107                         /* NUM lock */
 108                         if (!brk)
 109                                 num = !num;
 110                 } else {
 111                         num = brk ? 0 : 1;
 112                 }
 113         }
 114         if (act & CTL)
 115                 ctls = brk ? 0 : 1;
 116         if (act & CPS) {
 117                 if (act & L) {
 118                         /* CAPS lock */
 119                         if (!brk)
 120                                 caps = !caps;
 121                 } else {
 122                         caps = brk ? 0 : 1;
 123                 }
 124         }
 125         if (act & STP) {
 126                 if (act & L) {
 127                         if (!brk)
 128                                 stp = !stp;
 129                 } else {
 130                         stp = brk ? 0 : 1;
 131                 }
 132         }
 133
 134         if ((act & ASCII) && !brk) {
 135                 u_char chr;
 136
 137                 if (shfts)
 138                         chr = shift[dt];
 139                 else if (ctls)
 140                         chr = ctl[dt];
 141                 else
 142                         chr = unshift[dt];
 143
 144                 if (alts)
 145                         chr |= 0x80;
 146
 147                 if (caps && (chr >= 'a' && chr <= 'z'))
 148                         chr -= 'a' - 'A';
 149 #define CTRL(s) (s & 0x1F)
 150                 if ((chr == '\r') || (chr == '\n') ||
 151                     (chr == CTRL('A')) || (chr == CTRL('S'))) {
 152
 153                         /* Wait for key up */
 154                         while (1)
 155                         {
 156                                 while ((inb(KBSTATP) & KBINRDY) == 0)
 157                                         ;
 158                                 dt = inb(KBDATAP);
 159                                 if (dt & 0x80) /* key up */ break;
 160                         }
 161                 }
 162                 return (chr);
 163         }
 164
 165         if (first && brk)
 166                 return (0);     /* Ignore initial 'key up' codes */
 167         goto loop;
 168 }
 169
 170 void
 171 kbdreset(void)
 172 {
 173         u_char c;
 174         int i;
 175
 176         /* Send self-test */
 177         while (inb(KBSTATP) & KBOUTRDY)
 178                 ;
 179         outb(KBSTATP, 0xAA);
 180         while ((inb(KBSTATP) & KBINRDY) == 0)   /* wait input ready */
 181                 ;
 182         if ((c = inb(KBDATAP)) != 0x55) {
 183                 printf("Keyboard self test failed - result: %x\n", c);
 184         }
 185         /* Enable interrupts and keyboard controller */
 186         while (inb(KBSTATP) & KBOUTRDY)
 187                 ;
 188         outb(KBSTATP, 0x60);
 189         while (inb(KBSTATP) & KBOUTRDY)
 190                 ;
 191         outb(KBDATAP, 0x45);
 192         for (i = 0;  i < 10000;  i++)
 193                 ;
 194         while (inb(KBSTATP) & KBOUTRDY)
 195                 ;
 196         outb(KBSTATP, 0xAE);
 197 }
 198
 199 int
 200 kbd_getc(void)
 201 {
 202         int c;
 203         while ((c = kbd(0)) == 0)
 204                 ;
 205         return (c);
 206 }
 207 #endif /* CONS_VGA */