source: mainline/arch/ia32/src/drivers/i8042.c@ a83a802

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since a83a802 was a83a802, checked in by Jakub Jermar <jakub@…>, 20 years ago

SMP work.
Add madt_irq_to_pin().
Make ksmp() use virtual irq_to_pin() function, which makes better sence for ACPI configurations.
  • Property mode set to 100644
File size: 8.1 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
41/**
42 * i8042 processor driver.
43 * It takes care of low-level keyboard functions.
44 */
45
46#define i8042_DATA 0x60
47#define i8042_STATUS 0x64
48
49/** Keyboard commands. */
50#define KBD_ENABLE 0xf4
51#define KBD_DISABLE 0xf5
52#define KBD_ACK 0xfa
53
54#define SPECIAL '?'
55#define KEY_RELEASE 0x80
56
57static void key_released(__u8 sc);
58static void key_pressed(__u8 sc);
59
60#define PRESSED_SHIFT (1<<0)
61#define PRESSED_CAPSLOCK (1<<1)
62#define LOCKED_CAPSLOCK (1<<0)
63
64static spinlock_t keylock; /**< keylock protects keyflags and lockflags. */
65static volatile int keyflags; /**< Tracking of multiple keypresses. */
66static volatile int lockflags; /**< Tracking of multiple keys lockings. */
67
68static void i8042_suspend(void);
69static void i8042_resume(void);
70
71static chardev_t kbrd;
72static chardev_operations_t ops = {
73 .suspend = i8042_suspend,
74 .resume = i8042_resume
75};
76
77/** Primary meaning of scancodes. */
78static char sc_primary_map[] = {
79 SPECIAL, /* 0x00 */
80 SPECIAL, /* 0x01 - Esc */
81 '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
82 SPECIAL, /* 0x0e - Backspace */
83 '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
84 SPECIAL, /* 0x1d - LCtrl */
85 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
86 '`',
87 SPECIAL, /* 0x2a - LShift */
88 '\\',
89 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
90 SPECIAL, /* 0x36 - RShift */
91 '*',
92 SPECIAL, /* 0x38 - LAlt */
93 ' ',
94 SPECIAL, /* 0x3a - CapsLock */
95 SPECIAL, /* 0x3b - F1 */
96 SPECIAL, /* 0x3c - F2 */
97 SPECIAL, /* 0x3d - F3 */
98 SPECIAL, /* 0x3e - F4 */
99 SPECIAL, /* 0x3f - F5 */
100 SPECIAL, /* 0x40 - F6 */
101 SPECIAL, /* 0x41 - F7 */
102 SPECIAL, /* 0x42 - F8 */
103 SPECIAL, /* 0x43 - F9 */
104 SPECIAL, /* 0x44 - F10 */
105 SPECIAL, /* 0x45 - NumLock */
106 SPECIAL, /* 0x46 - ScrollLock */
107 '7', '8', '9', '-',
108 '4', '5', '6', '+',
109 '1', '2', '3',
110 '0', '.',
111 SPECIAL, /* 0x54 - Alt-SysRq */
112 SPECIAL, /* 0x55 - F11/F12/PF1/FN */
113 SPECIAL, /* 0x56 - unlabelled key next to LAlt */
114 SPECIAL, /* 0x57 - F11 */
115 SPECIAL, /* 0x58 - F12 */
116 SPECIAL, /* 0x59 */
117 SPECIAL, /* 0x5a */
118 SPECIAL, /* 0x5b */
119 SPECIAL, /* 0x5c */
120 SPECIAL, /* 0x5d */
121 SPECIAL, /* 0x5e */
122 SPECIAL, /* 0x5f */
123 SPECIAL, /* 0x60 */
124 SPECIAL, /* 0x61 */
125 SPECIAL, /* 0x62 */
126 SPECIAL, /* 0x63 */
127 SPECIAL, /* 0x64 */
128 SPECIAL, /* 0x65 */
129 SPECIAL, /* 0x66 */
130 SPECIAL, /* 0x67 */
131 SPECIAL, /* 0x68 */
132 SPECIAL, /* 0x69 */
133 SPECIAL, /* 0x6a */
134 SPECIAL, /* 0x6b */
135 SPECIAL, /* 0x6c */
136 SPECIAL, /* 0x6d */
137 SPECIAL, /* 0x6e */
138 SPECIAL, /* 0x6f */
139 SPECIAL, /* 0x70 */
140 SPECIAL, /* 0x71 */
141 SPECIAL, /* 0x72 */
142 SPECIAL, /* 0x73 */
143 SPECIAL, /* 0x74 */
144 SPECIAL, /* 0x75 */
145 SPECIAL, /* 0x76 */
146 SPECIAL, /* 0x77 */
147 SPECIAL, /* 0x78 */
148 SPECIAL, /* 0x79 */
149 SPECIAL, /* 0x7a */
150 SPECIAL, /* 0x7b */
151 SPECIAL, /* 0x7c */
152 SPECIAL, /* 0x7d */
153 SPECIAL, /* 0x7e */
154 SPECIAL, /* 0x7f */
155};
156
157/** Secondary meaning of scancodes. */
158static char sc_secondary_map[] = {
159 SPECIAL, /* 0x00 */
160 SPECIAL, /* 0x01 - Esc */
161 '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
162 SPECIAL, /* 0x0e - Backspace */
163 '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
164 SPECIAL, /* 0x1d - LCtrl */
165 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
166 '~',
167 SPECIAL, /* 0x2a - LShift */
168 '|',
169 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
170 SPECIAL, /* 0x36 - RShift */
171 '*',
172 SPECIAL, /* 0x38 - LAlt */
173 ' ',
174 SPECIAL, /* 0x3a - CapsLock */
175 SPECIAL, /* 0x3b - F1 */
176 SPECIAL, /* 0x3c - F2 */
177 SPECIAL, /* 0x3d - F3 */
178 SPECIAL, /* 0x3e - F4 */
179 SPECIAL, /* 0x3f - F5 */
180 SPECIAL, /* 0x40 - F6 */
181 SPECIAL, /* 0x41 - F7 */
182 SPECIAL, /* 0x42 - F8 */
183 SPECIAL, /* 0x43 - F9 */
184 SPECIAL, /* 0x44 - F10 */
185 SPECIAL, /* 0x45 - NumLock */
186 SPECIAL, /* 0x46 - ScrollLock */
187 '7', '8', '9', '-',
188 '4', '5', '6', '+',
189 '1', '2', '3',
190 '0', '.',
191 SPECIAL, /* 0x54 - Alt-SysRq */
192 SPECIAL, /* 0x55 - F11/F12/PF1/FN */
193 SPECIAL, /* 0x56 - unlabelled key next to LAlt */
194 SPECIAL, /* 0x57 - F11 */
195 SPECIAL, /* 0x58 - F12 */
196 SPECIAL, /* 0x59 */
197 SPECIAL, /* 0x5a */
198 SPECIAL, /* 0x5b */
199 SPECIAL, /* 0x5c */
200 SPECIAL, /* 0x5d */
201 SPECIAL, /* 0x5e */
202 SPECIAL, /* 0x5f */
203 SPECIAL, /* 0x60 */
204 SPECIAL, /* 0x61 */
205 SPECIAL, /* 0x62 */
206 SPECIAL, /* 0x63 */
207 SPECIAL, /* 0x64 */
208 SPECIAL, /* 0x65 */
209 SPECIAL, /* 0x66 */
210 SPECIAL, /* 0x67 */
211 SPECIAL, /* 0x68 */
212 SPECIAL, /* 0x69 */
213 SPECIAL, /* 0x6a */
214 SPECIAL, /* 0x6b */
215 SPECIAL, /* 0x6c */
216 SPECIAL, /* 0x6d */
217 SPECIAL, /* 0x6e */
218 SPECIAL, /* 0x6f */
219 SPECIAL, /* 0x70 */
220 SPECIAL, /* 0x71 */
221 SPECIAL, /* 0x72 */
222 SPECIAL, /* 0x73 */
223 SPECIAL, /* 0x74 */
224 SPECIAL, /* 0x75 */
225 SPECIAL, /* 0x76 */
226 SPECIAL, /* 0x77 */
227 SPECIAL, /* 0x78 */
228 SPECIAL, /* 0x79 */
229 SPECIAL, /* 0x7a */
230 SPECIAL, /* 0x7b */
231 SPECIAL, /* 0x7c */
232 SPECIAL, /* 0x7d */
233 SPECIAL, /* 0x7e */
234 SPECIAL, /* 0x7f */
235};
236
237/** Initialize i8042. */
238void i8042_init(void)
239{
240 trap_register(VECTOR_KBD, i8042_interrupt);
241 trap_virtual_enable_irqs(1<<IRQ_KBD);
242 spinlock_initialize(&keylock);
243 chardev_initialize(&kbrd, &ops);
244 stdin = &kbrd;
245}
246
247/** Process i8042 interrupt.
248 *
249 * @param n Interrupt vector.
250 * @param stack Interrupted stack.
251 */
252void i8042_interrupt(__u8 n, __native stack[])
253{
254 __u8 x;
255
256 trap_virtual_eoi();
257 x = inb(i8042_DATA);
258 if (x & KEY_RELEASE)
259 key_released(x ^ KEY_RELEASE);
260 else
261 key_pressed(x);
262}
263
264/** Process release of key.
265 *
266 * @param sc Scancode of the key being released.
267 */
268void key_released(__u8 sc)
269{
270 spinlock_lock(&keylock);
271 switch (sc) {
272 case SC_LSHIFT:
273 case SC_RSHIFT:
274 keyflags &= ~PRESSED_SHIFT;
275 break;
276 case SC_CAPSLOCK:
277 keyflags &= ~PRESSED_CAPSLOCK;
278 if (lockflags & LOCKED_CAPSLOCK)
279 lockflags &= ~LOCKED_CAPSLOCK;
280 else
281 lockflags |= LOCKED_CAPSLOCK;
282 break;
283 default:
284 break;
285 }
286 spinlock_unlock(&keylock);
287}
288
289/** Process keypress.
290 *
291 * @param sc Scancode of the key being pressed.
292 */
293void key_pressed(__u8 sc)
294{
295 char *map = sc_primary_map;
296 char ascii = sc_primary_map[sc];
297 bool shift, capslock;
298 bool letter = false;
299
300 spinlock_lock(&keylock);
301 switch (sc) {
302 case SC_LSHIFT:
303 case SC_RSHIFT:
304 keyflags |= PRESSED_SHIFT;
305 break;
306 case SC_CAPSLOCK:
307 keyflags |= PRESSED_CAPSLOCK;
308 break;
309 default:
310 letter = (ascii >= 'a') && (ascii <= 'z');
311 capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
312 shift = keyflags & PRESSED_SHIFT;
313 if (letter && capslock)
314 shift = !shift;
315 if (shift)
316 map = sc_secondary_map;
317 chardev_push_character(&kbrd, map[sc]);
318 break;
319 }
320 spinlock_unlock(&keylock);
321}
322
323/* Called from getc(). */
324void i8042_resume(void)
325{
326}
327
328/* Called from getc(). */
329void i8042_suspend(void)
330{
331}
Note: See TracBrowser for help on using the repository browser.