2 * (C) Copyright 2002 ELTEC Elektronik AG
3 * Frank Gottschling <fgottschling@eltec.de>
5 * SPDX-License-Identifier: GPL-2.0+
8 /* i8042.c - Intel 8042 keyboard driver routines */
18 #define out8(p, v) outb(v, p)
20 #ifdef CONFIG_CONSOLE_CURSOR
21 extern void console_cursor(int state);
22 static int blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
23 static int cursor_state;
28 static int kbd_input = -1; /* no input yet */
29 static int kbd_mapping = KBD_US; /* default US keyboard */
30 static int kbd_flags = NORMAL; /* after reset */
31 static int kbd_state; /* unshift code */
33 static unsigned char kbd_fct_map[144] = {
34 /* kbd_fct_map table for scan code */
35 0, AS, AS, AS, AS, AS, AS, AS, /* scan 00-07 */
36 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 08-0F */
37 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 10-17 */
38 AS, AS, AS, AS, AS, CN, AS, AS, /* scan 18-1F */
39 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 20-27 */
40 AS, AS, SH, AS, AS, AS, AS, AS, /* scan 28-2F */
41 AS, AS, AS, AS, AS, AS, SH, AS, /* scan 30-37 */
42 AS, AS, CP, 0, 0, 0, 0, 0, /* scan 38-3F */
43 0, 0, 0, 0, 0, NM, ST, ES, /* scan 40-47 */
44 ES, ES, ES, ES, ES, ES, ES, ES, /* scan 48-4F */
45 ES, ES, ES, ES, 0, 0, AS, 0, /* scan 50-57 */
46 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
47 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
48 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
49 AS, 0, 0, AS, 0, 0, AS, 0, /* scan 70-77 */
50 0, AS, 0, 0, 0, AS, 0, 0, /* scan 78-7F */
51 AS, CN, AS, AS, AK, ST, EX, EX, /* enhanced */
52 AS, EX, EX, AS, EX, AS, EX, EX /* enhanced */
55 static unsigned char kbd_key_map[2][5][144] = {
58 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
59 '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 08-0F */
60 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
61 'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
62 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
63 '\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
64 'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
65 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
66 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
67 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
68 '2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
69 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
70 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
71 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
72 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
73 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
74 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
75 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
78 0, 0x1b, '!', '@', '#', '$', '%', '^', /* scan 00-07 */
79 '&', '*', '(', ')', '_', '+', 0x08, '\t', /* scan 08-0F */
80 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', /* scan 10-17 */
81 'O', 'P', '{', '}', '\r', CN, 'A', 'S', /* scan 18-1F */
82 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* scan 20-27 */
83 '"', '~', SH, '|', 'Z', 'X', 'C', 'V', /* scan 28-2F */
84 'B', 'N', 'M', '<', '>', '?', SH, '*', /* scan 30-37 */
85 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
86 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
87 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
88 '2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
89 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
90 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
91 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
92 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
93 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
94 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
95 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
98 0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
99 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
100 0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
101 0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
102 0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
103 0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
104 0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
105 0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
106 0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
110 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
111 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
112 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
113 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
114 '\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
115 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
117 { /* non numeric code */
118 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
119 '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 08-0F */
120 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
121 'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
122 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
123 '\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
124 'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
125 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
126 0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
127 'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
128 'r', 's', 'p', 'n', 0, 0, 0, 0, /* scan 50-57 */
129 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
130 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
131 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
132 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
133 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
134 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
135 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
137 { /* right alt mode - not used in US keyboard */
138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 08-0F */
140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
142 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
147 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
148 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
149 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
150 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
151 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
152 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
153 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
154 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
155 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
158 { /* German keyboard */
160 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
161 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
162 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
163 'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
164 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
165 0x84, '^', SH, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */
166 'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
167 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
168 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
169 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
170 '2', '3', '0', ',', 0, 0, '<', 0, /* scan 50-57 */
171 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
172 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
173 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
174 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
175 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
176 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
177 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
180 0, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 00-07 */
181 '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 08-0F */
182 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */
183 'O', 'P', 0x9a, '*', '\r', CN, 'A', 'S', /* scan 18-1F */
184 'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */
185 0x8e, 0xf8, SH, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */
186 'B', 'N', 'M', ';', ':', '_', SH, '*', /* scan 30-37 */
187 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
188 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
189 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
190 '2', '3', '0', ',', 0, 0, '>', 0, /* scan 50-57 */
191 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
192 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
193 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
194 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
195 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
196 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
197 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
200 0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
201 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 08-0F */
202 0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
203 0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
204 0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
205 0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
206 0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
207 0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
208 0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
209 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
210 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
211 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
212 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
213 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
214 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
215 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
216 '\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
217 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
219 { /* non numeric code */
220 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 00-07 */
221 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 08-0F */
222 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
223 'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
224 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
225 0x84, '^', SH, 0, 'y', 'x', 'c', 'v', /* scan 28-2F */
226 'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
227 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
228 0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
229 'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
230 'r', 's', 'p', 'n', 0, 0, '<', 0, /* scan 50-57 */
231 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
232 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
233 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
234 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
235 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
236 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
237 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
239 { /* right alt mode - is used in German keyboard */
240 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 00-07 */
241 '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 08-0F */
242 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10-17 */
243 0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18-1F */
244 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20-27 */
245 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28-2F */
246 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30-37 */
247 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
248 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40-47 */
249 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
250 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50-57 */
251 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
252 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
253 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
254 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
255 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
256 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
257 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
262 static unsigned char ext_key_map[] = {
263 0x1c, /* keypad enter */
264 0x1d, /* right control */
265 0x35, /* keypad slash */
266 0x37, /* print screen */
267 0x38, /* right alt */
269 0x47, /* editpad home */
270 0x48, /* editpad up */
271 0x49, /* editpad pgup */
272 0x4b, /* editpad left */
273 0x4d, /* editpad right */
274 0x4f, /* editpad end */
275 0x50, /* editpad dn */
276 0x51, /* editpad pgdn */
277 0x52, /* editpad ins */
278 0x53, /* editpad del */
282 static int kbd_input_empty(void)
284 int kbd_timeout = KBD_TIMEOUT * 1000;
286 while ((in8(I8042_STS_REG) & STATUS_IBF) && kbd_timeout--)
289 return kbd_timeout != -1;
292 static int kbd_output_full(void)
294 int kbd_timeout = KBD_TIMEOUT * 1000;
296 while (((in8(I8042_STS_REG) & STATUS_OBF) == 0) && kbd_timeout--)
299 return kbd_timeout != -1;
302 static void kbd_led_set(void)
305 out8(I8042_DATA_REG, CMD_SET_KBD_LED);
307 out8(I8042_DATA_REG, (kbd_flags & 0x7));
310 static void kbd_normal(unsigned char scan_code)
314 if ((kbd_flags & BRK) == NORMAL) {
315 chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
316 if ((chr == 0xff) || (chr == 0x00))
319 /* if caps lock convert upper to lower */
320 if (((kbd_flags & CAPS) == CAPS) &&
321 (chr >= 'a' && chr <= 'z')) {
328 static void kbd_shift(unsigned char scan_code)
330 if ((kbd_flags & BRK) == BRK) {
332 kbd_flags &= (~SHIFT);
339 static void kbd_ctrl(unsigned char scan_code)
341 if ((kbd_flags & BRK) == BRK) {
343 kbd_flags &= (~CTRL);
350 static void kbd_num(unsigned char scan_code)
352 if ((kbd_flags & BRK) == NORMAL) {
354 kbd_state = (kbd_flags & NUM) ? AS : NM;
359 static void kbd_alt(unsigned char scan_code)
361 if ((kbd_flags & BRK) == BRK) {
370 static void kbd_caps(unsigned char scan_code)
372 if ((kbd_flags & BRK) == NORMAL) {
378 static void kbd_scroll(unsigned char scan_code)
380 if ((kbd_flags & BRK) == NORMAL) {
390 static void kbd_conv_char(unsigned char scan_code)
392 if (scan_code == 0xe0) {
397 /* if high bit of scan_code, set break flag */
398 if (scan_code & 0x80)
403 if ((scan_code == 0xe1) || (kbd_flags & E1)) {
404 if (scan_code == 0xe1) {
405 kbd_flags ^= BRK; /* reset the break flag */
406 kbd_flags ^= E1; /* bitwise EXOR with E1 flag */
413 if (kbd_flags & EXT) {
417 for (i = 0; ext_key_map[i]; i++) {
418 if (ext_key_map[i] == scan_code) {
419 scan_code = 0x80 + i;
428 switch (kbd_fct_map[scan_code]) {
430 kbd_normal(scan_code);
433 kbd_shift(scan_code);
448 kbd_scroll(scan_code);
455 static int kbd_reset(void)
459 /* controller self test */
460 if (kbd_input_empty() == 0)
462 out8(I8042_CMD_REG, CMD_SELF_TEST);
463 if (kbd_output_full() == 0)
465 if (in8(I8042_DATA_REG) != KBC_TEST_OK)
469 if (kbd_input_empty() == 0)
471 out8(I8042_DATA_REG, CMD_RESET_KBD);
472 if (kbd_output_full() == 0)
474 if (in8(I8042_DATA_REG) != KBD_ACK)
476 if (kbd_output_full() == 0)
478 if (in8(I8042_DATA_REG) != KBD_POR)
481 /* set AT translation and disable irq */
482 if (kbd_input_empty() == 0)
484 out8(I8042_CMD_REG, CMD_RD_CONFIG);
485 if (kbd_output_full() == 0)
487 config = in8(I8042_DATA_REG);
488 config |= CONFIG_AT_TRANS;
489 config &= ~(CONFIG_KIRQ_EN | CONFIG_MIRQ_EN);
490 if (kbd_input_empty() == 0)
492 out8(I8042_CMD_REG, CMD_WR_CONFIG);
493 if (kbd_input_empty() == 0)
495 out8(I8042_DATA_REG, config);
497 /* enable keyboard */
498 if (kbd_input_empty() == 0)
500 out8(I8042_CMD_REG, CMD_KBD_EN);
501 if (kbd_input_empty() == 0)
507 static int kbd_controller_present(void)
509 return in8(I8042_STS_REG) != 0xff;
513 * Implement a weak default function for boards that optionally
514 * need to skip the i8042 initialization.
516 int __weak board_i8042_skip(void)
518 /* As default, don't skip */
522 void i8042_flush(void)
527 * The delay is to give the keyboard controller some time
528 * to fill the next byte.
531 timeout = 100; /* wait for no longer than 100us */
532 while (timeout > 0 && !(in8(I8042_STS_REG) & STATUS_OBF)) {
537 /* Try to pull next byte if not timeout */
538 if (in8(I8042_STS_REG) & STATUS_OBF)
545 int i8042_disable(void)
547 if (kbd_input_empty() == 0)
550 /* Disable keyboard */
551 out8(I8042_CMD_REG, CMD_KBD_DIS);
553 if (kbd_input_empty() == 0)
559 /* i8042_kbd_init - reset keyboard and init state flags */
560 int i8042_kbd_init(void)
565 if (!kbd_controller_present() || board_i8042_skip()) {
566 debug("i8042 keyboard controller is not present\n");
570 /* Init keyboard device (default US layout) */
572 penv = getenv("keymap");
574 if (strncmp(penv, "de", 3) == 0)
578 for (try = 0; try < KBD_RESET_TRIES; try++) {
579 if (kbd_reset() == 0) {
580 kbd_mapping = keymap;
593 * i8042_tstc - test if keyboard input is available
595 * option: cursor blinking if called in a loop
597 int i8042_tstc(struct stdio_dev *dev)
599 unsigned char scan_code = 0;
601 #ifdef CONFIG_CONSOLE_CURSOR
602 if (--blink_count == 0) {
604 console_cursor(cursor_state);
605 blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
610 if ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
613 scan_code = in8(I8042_DATA_REG);
614 if (scan_code == 0xfa)
617 kbd_conv_char(scan_code);
627 * i8042_getc - wait till keyboard input is available
629 * option: turn on/off cursor while waiting
631 int i8042_getc(struct stdio_dev *dev)
634 unsigned char scan_code;
636 while (kbd_input == -1) {
637 while ((in8(I8042_STS_REG) & STATUS_OBF) == 0) {
638 #ifdef CONFIG_CONSOLE_CURSOR
639 if (--blink_count == 0) {
641 console_cursor(cursor_state);
642 blink_count = CONFIG_SYS_CONSOLE_BLINK_COUNT;
647 scan_code = in8(I8042_DATA_REG);
648 if (scan_code != 0xfa)
649 kbd_conv_char(scan_code);