source: mainline/arch/ia32/src/drivers/i8042.c@ 80d2bdb

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 80d2bdb was dc747e3, checked in by Jakub Jermar <jakub@…>, 20 years ago

Add SPINLOCK_DECLARE and SPINLOCK_INITIALIZE macros.
SPINLOCK_DECLARE is to be used instead of direct spinlock_t declarations
in dynamically allocated structures on which spinlock_initialize() is called after
their creation.
SPINLOCK_INITIALIZE is to be used instead of direct spinlock_t declarations
of global spinlocks. It declares and initializes the spinlock.
Moreover, both macros are empty on UP so that -Wall warnings about unused structures
get supressed.
  • Property mode set to 100644
File size: 9.3 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
66SPINLOCK_INITIALIZE(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 '\b', /* 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 chardev_initialize("i8042_kbd", &kbrd, &ops);
247 stdin = &kbrd;
248}
249
250/** Process i8042 interrupt.
251 *
252 * @param n Interrupt vector.
253 * @param stack Interrupted stack.
254 */
255void i8042_interrupt(int n, void *stack)
256{
257 __u8 x;
258
259 trap_virtual_eoi();
260 x = inb(i8042_DATA);
261 if (x & KEY_RELEASE)
262 key_released(x ^ KEY_RELEASE);
263 else
264 key_pressed(x);
265}
266
267/** Process release of key.
268 *
269 * @param sc Scancode of the key being released.
270 */
271void key_released(__u8 sc)
272{
273 spinlock_lock(&keylock);
274 switch (sc) {
275 case SC_LSHIFT:
276 case SC_RSHIFT:
277 keyflags &= ~PRESSED_SHIFT;
278 break;
279 case SC_CAPSLOCK:
280 keyflags &= ~PRESSED_CAPSLOCK;
281 if (lockflags & LOCKED_CAPSLOCK)
282 lockflags &= ~LOCKED_CAPSLOCK;
283 else
284 lockflags |= LOCKED_CAPSLOCK;
285 break;
286 default:
287 break;
288 }
289 spinlock_unlock(&keylock);
290}
291
292/** Process keypress.
293 *
294 * @param sc Scancode of the key being pressed.
295 */
296void key_pressed(__u8 sc)
297{
298 char *map = sc_primary_map;
299 char ascii = sc_primary_map[sc];
300 bool shift, capslock;
301 bool letter = false;
302
303 spinlock_lock(&keylock);
304 switch (sc) {
305 case SC_LSHIFT:
306 case SC_RSHIFT:
307 keyflags |= PRESSED_SHIFT;
308 break;
309 case SC_CAPSLOCK:
310 keyflags |= PRESSED_CAPSLOCK;
311 break;
312 case SC_SPEC_ESCAPE:
313 break;
314 case SC_LEFTARR:
315 chardev_push_character(&kbrd, 0x1b);
316 chardev_push_character(&kbrd, 0x5b);
317 chardev_push_character(&kbrd, 0x44);
318 break;
319 case SC_RIGHTARR:
320 chardev_push_character(&kbrd, 0x1b);
321 chardev_push_character(&kbrd, 0x5b);
322 chardev_push_character(&kbrd, 0x43);
323 break;
324 case SC_UPARR:
325 chardev_push_character(&kbrd, 0x1b);
326 chardev_push_character(&kbrd, 0x5b);
327 chardev_push_character(&kbrd, 0x41);
328 break;
329 case SC_DOWNARR:
330 chardev_push_character(&kbrd, 0x1b);
331 chardev_push_character(&kbrd, 0x5b);
332 chardev_push_character(&kbrd, 0x42);
333 break;
334 case SC_HOME:
335 chardev_push_character(&kbrd, 0x1b);
336 chardev_push_character(&kbrd, 0x4f);
337 chardev_push_character(&kbrd, 0x48);
338 break;
339 case SC_END:
340 chardev_push_character(&kbrd, 0x1b);
341 chardev_push_character(&kbrd, 0x4f);
342 chardev_push_character(&kbrd, 0x46);
343 break;
344 case SC_DELETE:
345 chardev_push_character(&kbrd, 0x1b);
346 chardev_push_character(&kbrd, 0x5b);
347 chardev_push_character(&kbrd, 0x33);
348 chardev_push_character(&kbrd, 0x7e);
349 break;
350 default:
351 letter = is_lower(ascii);
352 capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
353 shift = keyflags & PRESSED_SHIFT;
354 if (letter && capslock)
355 shift = !shift;
356 if (shift)
357 map = sc_secondary_map;
358 chardev_push_character(&kbrd, map[sc]);
359 break;
360 }
361 spinlock_unlock(&keylock);
362}
363
364/* Called from getc(). */
365void i8042_resume(chardev_t *d)
366{
367}
368
369/* Called from getc(). */
370void i8042_suspend(chardev_t *d)
371{
372}
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