source: mainline/arch/ia32/src/drivers/i8042.c@ fcfac420

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since fcfac420 was fcfac420, checked in by Ondrej Palkovsky <ondrap@…>, 20 years ago

Changed ia32 & amd64 to use exc_register instead of trap_register.

Fixed dependency list building. I hope you all have 'makedepend' installed,
if you don't it's time to install it, as CC -M builds the dependency
list without directory names..and it just does not work.
  • Property mode set to 100644
File size: 8.3 KB
Line 
1/*
2 * Copyright (C) 2001-2004 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <arch/i8042.h>
30#include <arch/i8259.h>
31#include <arch/interrupt.h>
32#include <cpu.h>
33#include <arch/asm.h>
34#include <arch.h>
35#include <print.h>
36#include <synch/spinlock.h>
37#include <typedefs.h>
38#include <console/chardev.h>
39#include <console/console.h>
40#include <macros.h>
41#include <interrupt.h>
42
43/**
44 * i8042 processor driver.
45 * It takes care of low-level keyboard functions.
46 */
47
48#define i8042_DATA 0x60
49#define i8042_STATUS 0x64
50
51/** Keyboard commands. */
52#define KBD_ENABLE 0xf4
53#define KBD_DISABLE 0xf5
54#define KBD_ACK 0xfa
55
56#define SPECIAL '?'
57#define KEY_RELEASE 0x80
58
59static void key_released(__u8 sc);
60static void key_pressed(__u8 sc);
61
62#define PRESSED_SHIFT (1<<0)
63#define PRESSED_CAPSLOCK (1<<1)
64#define LOCKED_CAPSLOCK (1<<0)
65
66static spinlock_t keylock; /**< keylock protects keyflags and lockflags. */
67static volatile int keyflags; /**< Tracking of multiple keypresses. */
68static volatile int lockflags; /**< Tracking of multiple keys lockings. */
69
70static void i8042_suspend(chardev_t *);
71static void i8042_resume(chardev_t *);
72
73static chardev_t kbrd;
74static chardev_operations_t ops = {
75 .suspend = i8042_suspend,
76 .resume = i8042_resume
77};
78
79/** Primary meaning of scancodes. */
80static char sc_primary_map[] = {
81 SPECIAL, /* 0x00 */
82 SPECIAL, /* 0x01 - Esc */
83 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
84 SPECIAL, /* 0x0e - Backspace */
85 '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
86 SPECIAL, /* 0x1d - LCtrl */
87 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
88 '`',
89 SPECIAL, /* 0x2a - LShift */
90 '\\',
91 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
92 SPECIAL, /* 0x36 - RShift */
93 '*',
94 SPECIAL, /* 0x38 - LAlt */
95 ' ',
96 SPECIAL, /* 0x3a - CapsLock */
97 SPECIAL, /* 0x3b - F1 */
98 SPECIAL, /* 0x3c - F2 */
99 SPECIAL, /* 0x3d - F3 */
100 SPECIAL, /* 0x3e - F4 */
101 SPECIAL, /* 0x3f - F5 */
102 SPECIAL, /* 0x40 - F6 */
103 SPECIAL, /* 0x41 - F7 */
104 SPECIAL, /* 0x42 - F8 */
105 SPECIAL, /* 0x43 - F9 */
106 SPECIAL, /* 0x44 - F10 */
107 SPECIAL, /* 0x45 - NumLock */
108 SPECIAL, /* 0x46 - ScrollLock */
109 '7', '8', '9', '-',
110 '4', '5', '6', '+',
111 '1', '2', '3',
112 '0', '.',
113 SPECIAL, /* 0x54 - Alt-SysRq */
114 SPECIAL, /* 0x55 - F11/F12/PF1/FN */
115 SPECIAL, /* 0x56 - unlabelled key next to LAlt */
116 SPECIAL, /* 0x57 - F11 */
117 SPECIAL, /* 0x58 - F12 */
118 SPECIAL, /* 0x59 */
119 SPECIAL, /* 0x5a */
120 SPECIAL, /* 0x5b */
121 SPECIAL, /* 0x5c */
122 SPECIAL, /* 0x5d */
123 SPECIAL, /* 0x5e */
124 SPECIAL, /* 0x5f */
125 SPECIAL, /* 0x60 */
126 SPECIAL, /* 0x61 */
127 SPECIAL, /* 0x62 */
128 SPECIAL, /* 0x63 */
129 SPECIAL, /* 0x64 */
130 SPECIAL, /* 0x65 */
131 SPECIAL, /* 0x66 */
132 SPECIAL, /* 0x67 */
133 SPECIAL, /* 0x68 */
134 SPECIAL, /* 0x69 */
135 SPECIAL, /* 0x6a */
136 SPECIAL, /* 0x6b */
137 SPECIAL, /* 0x6c */
138 SPECIAL, /* 0x6d */
139 SPECIAL, /* 0x6e */
140 SPECIAL, /* 0x6f */
141 SPECIAL, /* 0x70 */
142 SPECIAL, /* 0x71 */
143 SPECIAL, /* 0x72 */
144 SPECIAL, /* 0x73 */
145 SPECIAL, /* 0x74 */
146 SPECIAL, /* 0x75 */
147 SPECIAL, /* 0x76 */
148 SPECIAL, /* 0x77 */
149 SPECIAL, /* 0x78 */
150 SPECIAL, /* 0x79 */
151 SPECIAL, /* 0x7a */
152 SPECIAL, /* 0x7b */
153 SPECIAL, /* 0x7c */
154 SPECIAL, /* 0x7d */
155 SPECIAL, /* 0x7e */
156 SPECIAL, /* 0x7f */
157};
158
159/** Secondary meaning of scancodes. */
160static char sc_secondary_map[] = {
161 SPECIAL, /* 0x00 */
162 SPECIAL, /* 0x01 - Esc */
163 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
164 SPECIAL, /* 0x0e - Backspace */
165 '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
166 SPECIAL, /* 0x1d - LCtrl */
167 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
168 '~',
169 SPECIAL, /* 0x2a - LShift */
170 '|',
171 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
172 SPECIAL, /* 0x36 - RShift */
173 '*',
174 SPECIAL, /* 0x38 - LAlt */
175 ' ',
176 SPECIAL, /* 0x3a - CapsLock */
177 SPECIAL, /* 0x3b - F1 */
178 SPECIAL, /* 0x3c - F2 */
179 SPECIAL, /* 0x3d - F3 */
180 SPECIAL, /* 0x3e - F4 */
181 SPECIAL, /* 0x3f - F5 */
182 SPECIAL, /* 0x40 - F6 */
183 SPECIAL, /* 0x41 - F7 */
184 SPECIAL, /* 0x42 - F8 */
185 SPECIAL, /* 0x43 - F9 */
186 SPECIAL, /* 0x44 - F10 */
187 SPECIAL, /* 0x45 - NumLock */
188 SPECIAL, /* 0x46 - ScrollLock */
189 '7', '8', '9', '-',
190 '4', '5', '6', '+',
191 '1', '2', '3',
192 '0', '.',
193 SPECIAL, /* 0x54 - Alt-SysRq */
194 SPECIAL, /* 0x55 - F11/F12/PF1/FN */
195 SPECIAL, /* 0x56 - unlabelled key next to LAlt */
196 SPECIAL, /* 0x57 - F11 */
197 SPECIAL, /* 0x58 - F12 */
198 SPECIAL, /* 0x59 */
199 SPECIAL, /* 0x5a */
200 SPECIAL, /* 0x5b */
201 SPECIAL, /* 0x5c */
202 SPECIAL, /* 0x5d */
203 SPECIAL, /* 0x5e */
204 SPECIAL, /* 0x5f */
205 SPECIAL, /* 0x60 */
206 SPECIAL, /* 0x61 */
207 SPECIAL, /* 0x62 */
208 SPECIAL, /* 0x63 */
209 SPECIAL, /* 0x64 */
210 SPECIAL, /* 0x65 */
211 SPECIAL, /* 0x66 */
212 SPECIAL, /* 0x67 */
213 SPECIAL, /* 0x68 */
214 SPECIAL, /* 0x69 */
215 SPECIAL, /* 0x6a */
216 SPECIAL, /* 0x6b */
217 SPECIAL, /* 0x6c */
218 SPECIAL, /* 0x6d */
219 SPECIAL, /* 0x6e */
220 SPECIAL, /* 0x6f */
221 SPECIAL, /* 0x70 */
222 SPECIAL, /* 0x71 */
223 SPECIAL, /* 0x72 */
224 SPECIAL, /* 0x73 */
225 SPECIAL, /* 0x74 */
226 SPECIAL, /* 0x75 */
227 SPECIAL, /* 0x76 */
228 SPECIAL, /* 0x77 */
229 SPECIAL, /* 0x78 */
230 SPECIAL, /* 0x79 */
231 SPECIAL, /* 0x7a */
232 SPECIAL, /* 0x7b */
233 SPECIAL, /* 0x7c */
234 SPECIAL, /* 0x7d */
235 SPECIAL, /* 0x7e */
236 SPECIAL, /* 0x7f */
237};
238
239static void i8042_interrupt(int n, void *stack);
240
241/** Initialize i8042. */
242void i8042_init(void)
243{
244 exc_register(VECTOR_KBD, "i8042_interrupt", i8042_interrupt);
245 trap_virtual_enable_irqs(1<<IRQ_KBD);
246 spinlock_initialize(&keylock, "i8042_lock");
247 chardev_initialize("i8042_kbd", &kbrd, &ops);
248 stdin = &kbrd;
249}
250
251/** Process i8042 interrupt.
252 *
253 * @param n Interrupt vector.
254 * @param stack Interrupted stack.
255 */
256void i8042_interrupt(int n, void *stack)
257{
258 __u8 x;
259
260 trap_virtual_eoi();
261 x = inb(i8042_DATA);
262 if (x & KEY_RELEASE)
263 key_released(x ^ KEY_RELEASE);
264 else
265 key_pressed(x);
266}
267
268/** Process release of key.
269 *
270 * @param sc Scancode of the key being released.
271 */
272void key_released(__u8 sc)
273{
274 spinlock_lock(&keylock);
275 switch (sc) {
276 case SC_LSHIFT:
277 case SC_RSHIFT:
278 keyflags &= ~PRESSED_SHIFT;
279 break;
280 case SC_CAPSLOCK:
281 keyflags &= ~PRESSED_CAPSLOCK;
282 if (lockflags & LOCKED_CAPSLOCK)
283 lockflags &= ~LOCKED_CAPSLOCK;
284 else
285 lockflags |= LOCKED_CAPSLOCK;
286 break;
287 default:
288 break;
289 }
290 spinlock_unlock(&keylock);
291}
292
293/** Process keypress.
294 *
295 * @param sc Scancode of the key being pressed.
296 */
297void key_pressed(__u8 sc)
298{
299 char *map = sc_primary_map;
300 char ascii = sc_primary_map[sc];
301 bool shift, capslock;
302 bool letter = false;
303
304 spinlock_lock(&keylock);
305 switch (sc) {
306 case SC_LSHIFT:
307 case SC_RSHIFT:
308 keyflags |= PRESSED_SHIFT;
309 break;
310 case SC_CAPSLOCK:
311 keyflags |= PRESSED_CAPSLOCK;
312 break;
313 default:
314 letter = is_lower(ascii);
315 capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
316 shift = keyflags & PRESSED_SHIFT;
317 if (letter && capslock)
318 shift = !shift;
319 if (shift)
320 map = sc_secondary_map;
321 chardev_push_character(&kbrd, map[sc]);
322 break;
323 }
324 spinlock_unlock(&keylock);
325}
326
327/* Called from getc(). */
328void i8042_resume(chardev_t *d)
329{
330}
331
332/* Called from getc(). */
333void i8042_suspend(chardev_t *d)
334{
335}
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