1 /* $NetBSD: kbd.c,v 1.3 1999/06/28 01:20:44 sakamoto 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 #if defined(CONS_BE) || defined(CONS_VGA) 34 #include <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(noblock) 84 int noblock; 85 { 86 u_char dt, brk, act; 87 int first = 1; 88 89 loop: 90 if (noblock) { 91 if ((inb(KBSTATP) & KBINRDY) == 0) 92 return (-1); 93 } else while ((inb(KBSTATP) & KBINRDY) == 0) 94 ; 95 96 dt = inb(KBDATAP); 97 98 brk = dt & 0x80; /* brk == 1 on key release */ 99 dt = dt & 0x7f; /* keycode */ 100 101 act = action[dt]; 102 if (act & SHF) 103 shfts = brk ? 0 : 1; 104 if (act & ALT) 105 alts = brk ? 0 : 1; 106 if (act & NUM) { 107 if (act & L) { 108 /* NUM lock */ 109 if (!brk) 110 num = !num; 111 } else { 112 num = brk ? 0 : 1; 113 } 114 } 115 if (act & CTL) 116 ctls = brk ? 0 : 1; 117 if (act & CPS) { 118 if (act & L) { 119 /* CAPS lock */ 120 if (!brk) 121 caps = !caps; 122 } else { 123 caps = brk ? 0 : 1; 124 } 125 } 126 if (act & STP) { 127 if (act & L) { 128 if (!brk) 129 stp = !stp; 130 } else { 131 stp = brk ? 0 : 1; 132 } 133 } 134 135 if ((act & ASCII) && !brk) { 136 u_char chr; 137 138 if (shfts) 139 chr = shift[dt]; 140 else if (ctls) 141 chr = ctl[dt]; 142 else 143 chr = unshift[dt]; 144 145 if (alts) 146 chr |= 0x80; 147 148 if (caps && (chr >= 'a' && chr <= 'z')) 149 chr -= 'a' - 'A'; 150 #define CTRL(s) (s & 0x1F) 151 if ((chr == '\r') || (chr == '\n') || 152 (chr == CTRL('A')) || (chr == CTRL('S'))) { 153 154 /* Wait for key up */ 155 while (1) 156 { 157 while ((inb(KBSTATP) & KBINRDY) == 0) 158 ; 159 dt = inb(KBDATAP); 160 if (dt & 0x80) /* key up */ break; 161 } 162 } 163 return (chr); 164 } 165 166 if (first && brk) 167 return (0); /* Ignore initial 'key up' codes */ 168 goto loop; 169 } 170 171 void 172 kbdreset() 173 { 174 u_char c; 175 int i; 176 177 /* Send self-test */ 178 while (inb(KBSTATP) & KBOUTRDY) 179 ; 180 outb(KBSTATP, 0xAA); 181 while ((inb(KBSTATP) & KBINRDY) == 0) /* wait input ready */ 182 ; 183 if ((c = inb(KBDATAP)) != 0x55) { 184 printf("Keyboard self test failed - result: %x\n", c); 185 } 186 /* Enable interrupts and keyboard controller */ 187 while (inb(KBSTATP) & KBOUTRDY) 188 ; 189 outb(KBSTATP, 0x60); 190 while (inb(KBSTATP) & KBOUTRDY) 191 ; 192 outb(KBDATAP, 0x45); 193 for (i = 0; i < 10000; i++) 194 ; 195 while (inb(KBSTATP) & KBOUTRDY) 196 ; 197 outb(KBSTATP, 0xAE); 198 } 199 200 int 201 kbd_getc() 202 { 203 int c; 204 while ((c = kbd(0)) == 0) 205 ; 206 return (c); 207 } 208 209 int 210 kbd_test() 211 { 212 return ((inb(KBSTATP) & KBINRDY) != 0); 213 } 214 #endif /* CONS_BE || CONS_VGA*/ 215