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x86: i8042: Reorder static functions
[people/ms/u-boot.git] / drivers / input / i8042.c
CommitLineData
c609719b
WD		 1/*
2 * (C) Copyright 2002 ELTEC Elektronik AG
3 * Frank Gottschling <fgottschling@eltec.de>
4 *
3765b3e7 5 * SPDX-License-Identifier: GPL-2.0+
c609719b
WD		 6 */
7
8/* i8042.c - Intel 8042 keyboard driver routines */
9
10/* includes */
11
12#include <common.h>
c609719b
WD		 13#include <i8042.h>
14
15/* defines */
16
17#ifdef CONFIG_CONSOLE_CURSOR
dd4a5b22 18extern void console_cursor(int state);
6d0f6bcf 19static int blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
dd4a5b22 20static int cursor_state;
c609719b
WD		 21#endif
22
23/* locals */
24
bfc81252
WD		 25static int kbd_input = -1; /* no input yet */
26static int kbd_mapping = KBD_US; /* default US keyboard */
27static int kbd_flags = NORMAL; /* after reset */
dd4a5b22
GB		 28static int kbd_state; /* unshift code */
29
dd4a5b22
GB		 30static unsigned char kbd_fct_map[144] = {
31 /* kbd_fct_map table for scan code */
32 0, AS, AS, AS, AS, AS, AS, AS, /* scan 0- 7 */
33 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 8- F */
34 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 10-17 */
35 AS, AS, AS, AS, AS, CN, AS, AS, /* scan 18-1F */
36 AS, AS, AS, AS, AS, AS, AS, AS, /* scan 20-27 */
37 AS, AS, SH, AS, AS, AS, AS, AS, /* scan 28-2F */
38 AS, AS, AS, AS, AS, AS, SH, AS, /* scan 30-37 */
39 AS, AS, CP, 0, 0, 0, 0, 0, /* scan 38-3F */
40 0, 0, 0, 0, 0, NM, ST, ES, /* scan 40-47 */
41 ES, ES, ES, ES, ES, ES, ES, ES, /* scan 48-4F */
42 ES, ES, ES, ES, 0, 0, AS, 0, /* scan 50-57 */
43 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
44 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
45 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
46 AS, 0, 0, AS, 0, 0, AS, 0, /* scan 70-77 */
47 0, AS, 0, 0, 0, AS, 0, 0, /* scan 78-7F */
48 AS, CN, AS, AS, AK, ST, EX, EX, /* enhanced */
49 AS, EX, EX, AS, EX, AS, EX, EX /* enhanced */
50 };
51
52static unsigned char kbd_key_map[2][5][144] = {
53 { /* US keyboard */
54 { /* unshift code */
55 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 0- 7 */
56 '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 8- F */
57 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
58 'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
59 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
60 '\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
61 'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
62 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
63 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
64 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
65 '2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
66 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
67 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
68 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
69 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
70 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
71 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
72 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
73 },
74 { /* shift code */
75 0, 0x1b, '!', '@', '#', '$', '%', '^', /* scan 0- 7 */
76 '&', '*', '(', ')', '_', '+', 0x08, '\t', /* scan 8- F */
77 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', /* scan 10-17 */
78 'O', 'P', '{', '}', '\r', CN, 'A', 'S', /* scan 18-1F */
79 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', /* scan 20-27 */
80 '"', '~', SH, '|', 'Z', 'X', 'C', 'V', /* scan 28-2F */
81 'B', 'N', 'M', '<', '>', '?', SH, '*', /* scan 30-37 */
82 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
83 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
84 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
85 '2', '3', '0', '.', 0, 0, 0, 0, /* scan 50-57 */
86 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
87 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
88 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
89 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
90 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
91 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
92 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
93 },
94 { /* control code */
95 0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 0- 7 */
96 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 8- F */
97 0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
98 0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
99 0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
100 0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
101 0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
102 0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
103 0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
104 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
105 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
106 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
107 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
108 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
109 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
110 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
111 '\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
112 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
113 },
114 { /* non numeric code */
115 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 0- 7 */
116 '7', '8', '9', '0', '-', '=', 0x08, '\t', /* scan 8- F */
117 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', /* scan 10-17 */
118 'o', 'p', '[', ']', '\r', CN, 'a', 's', /* scan 18-1F */
119 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', /* scan 20-27 */
120 '\'', '`', SH, '\\', 'z', 'x', 'c', 'v', /* scan 28-2F */
121 'b', 'n', 'm', ',', '.', '/', SH, '*', /* scan 30-37 */
122 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
123 0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
124 'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
125 'r', 's', 'p', 'n', 0, 0, 0, 0, /* scan 50-57 */
126 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
127 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
128 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
129 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
130 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
131 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
132 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
133 },
134 { /* right alt mode - not used in US keyboard */
135 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 0 - 7 */
136 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 8 - F */
137 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
138 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
139 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
140 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
142 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
143 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
144 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
145 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50 -57 */
146 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
147 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
148 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
149 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
150 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
151 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
152 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
153 }
154 },
155 { /* german keyboard */
156 { /* unshift code */
157 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 0- 7 */
158 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 8- F */
159 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
160 'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
161 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
162 0x84, '^', SH, '#', 'y', 'x', 'c', 'v', /* scan 28-2F */
163 'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
164 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
165 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
166 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
167 '2', '3', '0', ',', 0, 0, '<', 0, /* scan 50-57 */
168 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
169 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
170 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
171 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
172 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
173 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
174 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
175 },
176 { /* shift code */
177 0, 0x1b, '!', '"', 0x15, '$', '%', '&', /* scan 0- 7 */
178 '/', '(', ')', '=', '?', '`', 0x08, '\t', /* scan 8- F */
179 'Q', 'W', 'E', 'R', 'T', 'Z', 'U', 'I', /* scan 10-17 */
180 'O', 'P', 0x9a, '*', '\r', CN, 'A', 'S', /* scan 18-1F */
181 'D', 'F', 'G', 'H', 'J', 'K', 'L', 0x99, /* scan 20-27 */
182 0x8e, 0xf8, SH, '\'', 'Y', 'X', 'C', 'V', /* scan 28-2F */
183 'B', 'N', 'M', ';', ':', '_', SH, '*', /* scan 30-37 */
184 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
185 0, 0, 0, 0, 0, NM, ST, '7', /* scan 40-47 */
186 '8', '9', '-', '4', '5', '6', '+', '1', /* scan 48-4F */
187 '2', '3', '0', ',', 0, 0, '>', 0, /* scan 50-57 */
188 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
189 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
190 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
191 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
192 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
193 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
194 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
195 },
196 { /* control code */
197 0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan 0- 7 */
198 0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan 8- F */
199 0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
200 0x0f, 0x10, 0x1b, 0x1d, '\r', CN, 0x01, 0x13, /* scan 18-1F */
201 0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
202 0xff, 0x1c, SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
203 0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff, SH, 0xff, /* scan 30-37 */
204 0xff, 0xff, CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
205 0xff, 0xff, 0xff, 0xff, 0xff, NM, ST, 0xff, /* scan 40-47 */
206 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
207 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
208 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
209 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
210 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
211 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
212 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
213 '\r', CN, '/', '*', ' ', ST, 0xff, 0xff, /* extended */
214 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
215 },
216 { /* non numeric code */
217 0, 0x1b, '1', '2', '3', '4', '5', '6', /* scan 0- 7 */
218 '7', '8', '9', '0', 0xe1, '\'', 0x08, '\t', /* scan 8- F */
219 'q', 'w', 'e', 'r', 't', 'z', 'u', 'i', /* scan 10-17 */
220 'o', 'p', 0x81, '+', '\r', CN, 'a', 's', /* scan 18-1F */
221 'd', 'f', 'g', 'h', 'j', 'k', 'l', 0x94, /* scan 20-27 */
222 0x84, '^', SH, 0, 'y', 'x', 'c', 'v', /* scan 28-2F */
223 'b', 'n', 'm', ',', '.', '-', SH, '*', /* scan 30-37 */
224 ' ', ' ', CP, 0, 0, 0, 0, 0, /* scan 38-3F */
225 0, 0, 0, 0, 0, NM, ST, 'w', /* scan 40-47 */
226 'x', 'y', 'l', 't', 'u', 'v', 'm', 'q', /* scan 48-4F */
227 'r', 's', 'p', 'n', 0, 0, '<', 0, /* scan 50-57 */
228 0, 0, 0, 0, 0, 0, 0, 0, /* scan 58-5F */
229 0, 0, 0, 0, 0, 0, 0, 0, /* scan 60-67 */
230 0, 0, 0, 0, 0, 0, 0, 0, /* scan 68-6F */
231 0, 0, 0, 0, 0, 0, 0, 0, /* scan 70-77 */
232 0, 0, 0, 0, 0, 0, 0, 0, /* scan 78-7F */
233 '\r', CN, '/', '*', ' ', ST, 'F', 'A', /* extended */
234 0, 'D', 'C', 0, 'B', 0, '@', 'P' /* extended */
235 },
236 { /* Right alt mode - is used in German keyboard */
237 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 0 - 7 */
238 '{', '[', ']', '}', '\\', 0xff, 0xff, 0xff, /* scan 8 - F */
239 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
240 0xff, 0xff, 0xff, '~', 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
241 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
242 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
243 0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
244 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
245 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
246 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
247 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, '|', 0xff, /* scan 50 -57 */
248 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
249 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
250 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
251 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
252 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
253 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
254 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff /* extended */
255 }
256 }
257 };
258
259static unsigned char ext_key_map[] = {
260 0x1c, /* keypad enter */
261 0x1d, /* right control */
262 0x35, /* keypad slash */
263 0x37, /* print screen */
264 0x38, /* right alt */
265 0x46, /* break */
266 0x47, /* editpad home */
267 0x48, /* editpad up */
268 0x49, /* editpad pgup */
269 0x4b, /* editpad left */
270 0x4d, /* editpad right */
271 0x4f, /* editpad end */
272 0x50, /* editpad dn */
273 0x51, /* editpad pgdn */
274 0x52, /* editpad ins */
275 0x53, /* editpad del */
276 0x00 /* map end */
277 };
c609719b 278
3928d66a
BM		 279static int kbd_input_empty(void)
280{
281 int kbdTimeout = KBD_TIMEOUT * 1000;
282
283 while ((in8(I8042_STATUS_REG) & I8042_STATUS_IN_DATA) && kbdTimeout--)
284 udelay(1);
285
286 return kbdTimeout != -1;
287}
288
289static int wait_until_kbd_output_full(void)
290{
291 int kbdTimeout = KBD_TIMEOUT * 1000;
292
293 while (((in8(I8042_STATUS_REG) & 0x01) == 0) && kbdTimeout--)
294 udelay(1);
295
296 return kbdTimeout != -1;
297}
298
299static void kbd_led_set(void)
300{
301 kbd_input_empty();
302 out8(I8042_DATA_REG, 0xed); /* SET LED command */
303 kbd_input_empty();
304 out8(I8042_DATA_REG, (kbd_flags & 0x7)); /* LED bits only */
305}
306
307static void kbd_normal(unsigned char scan_code)
308{
309 unsigned char chr;
310
311 if ((kbd_flags & BRK) == NORMAL) {
312 chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
313 if ((chr == 0xff) || (chr == 0x00))
314 return;
315
316 /* if caps lock convert upper to lower */
317 if (((kbd_flags & CAPS) == CAPS) &&
318 (chr >= 'a' && chr <= 'z')) {
319 chr -= 'a' - 'A';
320 }
321 kbd_input = chr;
322 }
323}
324
325static void kbd_shift(unsigned char scan_code)
326{
327 if ((kbd_flags & BRK) == BRK) {
328 kbd_state = AS;
329 kbd_flags &= (~SHIFT);
330 } else {
331 kbd_state = SH;
332 kbd_flags |= SHIFT;
333 }
334}
335
336static void kbd_ctrl(unsigned char scan_code)
337{
338 if ((kbd_flags & BRK) == BRK) {
339 kbd_state = AS;
340 kbd_flags &= (~CTRL);
341 } else {
342 kbd_state = CN;
343 kbd_flags |= CTRL;
344 }
345}
346
347static void kbd_num(unsigned char scan_code)
348{
349 if ((kbd_flags & BRK) == NORMAL) {
350 kbd_flags ^= NUM;
351 kbd_state = (kbd_flags & NUM) ? AS : NM;
352 kbd_led_set(); /* update keyboard LED */
353 }
354}
355
356static void kbd_alt(unsigned char scan_code)
357{
358 if ((kbd_flags & BRK) == BRK) {
359 kbd_state = AS;
360 kbd_flags &= (~ALT);
361 } else {
362 kbd_state = AK;
363 kbd_flags &= ALT;
364 }
365}
366
367static void kbd_caps(unsigned char scan_code)
368{
369 if ((kbd_flags & BRK) == NORMAL) {
370 kbd_flags ^= CAPS;
371 kbd_led_set(); /* update keyboard LED */
372 }
373}
374
375static void kbd_scroll(unsigned char scan_code)
376{
377 if ((kbd_flags & BRK) == NORMAL) {
378 kbd_flags ^= STP;
379 kbd_led_set(); /* update keyboard LED */
380 if (kbd_flags & STP)
381 kbd_input = 0x13;
382 else
383 kbd_input = 0x11;
384 }
385}
386
387static void kbd_conv_char(unsigned char scan_code)
388{
389 if (scan_code == 0xe0) {
390 kbd_flags |= EXT;
391 return;
392 }
393
394 /* if high bit of scan_code, set break flag */
395 if (scan_code & 0x80)
396 kbd_flags |= BRK;
397 else
398 kbd_flags &= ~BRK;
399
400 if ((scan_code == 0xe1) || (kbd_flags & E1)) {
401 if (scan_code == 0xe1) {
402 kbd_flags ^= BRK; /* reset the break flag */
403 kbd_flags ^= E1; /* bitwise EXOR with E1 flag */
404 }
405 return;
406 }
407
408 scan_code &= 0x7f;
409
410 if (kbd_flags & EXT) {
411 int i;
412
413 kbd_flags ^= EXT;
414 for (i = 0; ext_key_map[i]; i++) {
415 if (ext_key_map[i] == scan_code) {
416 scan_code = 0x80 + i;
417 break;
418 }
419 }
420 /* not found ? */
421 if (!ext_key_map[i])
422 return;
423 }
424
425 switch (kbd_fct_map[scan_code]) {
426 case AS:
427 kbd_normal(scan_code);
428 break;
429 case SH:
430 kbd_shift(scan_code);
431 break;
432 case CN:
433 kbd_ctrl(scan_code);
434 break;
435 case NM:
436 kbd_num(scan_code);
437 break;
438 case AK:
439 kbd_alt(scan_code);
440 break;
441 case CP:
442 kbd_caps(scan_code);
443 break;
444 case ST:
445 kbd_scroll(scan_code);
446 break;
447 }
448 return;
449}
450
22e0f5a9
GB		 451/******************************************************************************/
452
3928d66a
BM		 453static int kbd_reset(void)
454{
455 /* KB Reset */
456 if (kbd_input_empty() == 0)
457 return -1;
458
459 out8(I8042_DATA_REG, 0xff);
460
461 if (wait_until_kbd_output_full() == 0)
462 return -1;
463
464 if (in8(I8042_DATA_REG) != 0xfa) /* ACK */
465 return -1;
466
467 if (wait_until_kbd_output_full() == 0)
468 return -1;
469
470 if (in8(I8042_DATA_REG) != 0xaa) /* Test Pass*/
471 return -1;
472
473 if (kbd_input_empty() == 0)
474 return -1;
475
476 /* Set KBC mode */
477 out8(I8042_COMMAND_REG, 0x60);
478
479 if (kbd_input_empty() == 0)
480 return -1;
481
482 out8(I8042_DATA_REG, 0x45);
483
484 if (kbd_input_empty() == 0)
485 return -1;
486
487 /* Enable Keyboard */
488 out8(I8042_COMMAND_REG, 0xae);
489 if (kbd_input_empty() == 0)
490 return -1;
491
492 out8(I8042_COMMAND_REG, 0x60);
493 if (kbd_input_empty() == 0)
494 return -1;
495
496 out8(I8042_DATA_REG, 0xf4);
497 if (kbd_input_empty() == 0)
498 return -1;
499
500 return 0;
501}
502
22e0f5a9
GB		 503static int kbd_controller_present(void)
504{
505 return in8(I8042_STATUS_REG) != 0xff;
506}
507
48edb304
GB		 508/*
509 * Implement a weak default function for boards that optionally
510 * need to skip the i8042 initialization.
511 */
512int __weak board_i8042_skip(void)
513{
514 /* As default, don't skip */
515 return 0;
516}
517
45fe668f
LYCL		 518void i8042_flush(void)
519{
520 int timeout;
521
522 /*
523 * The delay is to give the keyboard controller some time to fill the
524 * next byte.
525 */
526 while (1) {
527 timeout = 100; /* wait for no longer than 100us */
528 while (timeout > 0 && !(in8(I8042_STATUS_REG) & 0x01)) {
529 udelay(1);
530 timeout--;
531 }
532
533 /* Try to pull next byte if not timeout. */
534 if (in8(I8042_STATUS_REG) & 0x01)
535 in8(I8042_DATA_REG);
536 else
537 break;
538 }
539}
540
541int i8042_disable(void)
542{
543 if (kbd_input_empty() == 0)
544 return -1;
545
546 /* Disable keyboard */
547 out8(I8042_COMMAND_REG, 0xad);
548
549 if (kbd_input_empty() == 0)
550 return -1;
551
552 return 0;
553}
554
c609719b
WD		 555/*******************************************************************************
556 *
557 * i8042_kbd_init - reset keyboard and init state flags
558 */
dd4a5b22 559int i8042_kbd_init(void)
c609719b 560{
dd4a5b22
GB		 561 int keymap, try;
562 char *penv;
c609719b 563
48edb304 564 if (!kbd_controller_present() || board_i8042_skip())
22e0f5a9
GB		 565 return -1;
566
dd4a5b22
GB		 567 /* Init keyboard device (default US layout) */
568 keymap = KBD_US;
569 penv = getenv("keymap");
570 if (penv != NULL) {
571 if (strncmp(penv, "de", 3) == 0)
572 keymap = KBD_GER;
573 }
574
575 for (try = 0; try < KBD_RESET_TRIES; try++) {
576 if (kbd_reset() == 0) {
577 kbd_mapping = keymap;
578 kbd_flags = NORMAL;
579 kbd_state = 0;
580 kbd_led_set();
581 return 0;
582 }
583 }
584 return -1;
c609719b
WD		 585}
586
587
588/*******************************************************************************
589 *
590 * i8042_tstc - test if keyboard input is available
bfc81252 591 * option: cursor blinking if called in a loop
c609719b 592 */
709ea543 593int i8042_tstc(struct stdio_dev *dev)
c609719b 594{
dd4a5b22 595 unsigned char scan_code = 0;
c609719b
WD		 596
597#ifdef CONFIG_CONSOLE_CURSOR
dd4a5b22
GB		 598 if (--blinkCount == 0) {
599 cursor_state ^= 1;
600 console_cursor(cursor_state);
601 blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
602 udelay(10);
603 }
c609719b
WD		 604#endif
605
dd4a5b22
GB		 606 if ((in8(I8042_STATUS_REG) & 0x01) == 0) {
607 return 0;
608 } else {
609 scan_code = in8(I8042_DATA_REG);
610 if (scan_code == 0xfa)
611 return 0;
612
613 kbd_conv_char(scan_code);
614
615 if (kbd_input != -1)
616 return 1;
617 }
8bde7f77 618 return 0;
c609719b
WD		 619}
620
621
622/*******************************************************************************
623 *
624 * i8042_getc - wait till keyboard input is available
bfc81252 625 * option: turn on/off cursor while waiting
c609719b 626 */
709ea543 627int i8042_getc(struct stdio_dev *dev)
c609719b 628{
dd4a5b22
GB		 629 int ret_chr;
630 unsigned char scan_code;
c609719b 631
dd4a5b22
GB		 632 while (kbd_input == -1) {
633 while ((in8(I8042_STATUS_REG) & 0x01) == 0) {
c609719b 634#ifdef CONFIG_CONSOLE_CURSOR
dd4a5b22
GB		 635 if (--blinkCount == 0) {
636 cursor_state ^= 1;
637 console_cursor(cursor_state);
638 blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
639 }
640 udelay(10);
c609719b 641#endif
dd4a5b22
GB		 642 }
643 scan_code = in8(I8042_DATA_REG);
644 if (scan_code != 0xfa)
645 kbd_conv_char (scan_code);
8bde7f77 646 }
dd4a5b22
GB		 647 ret_chr = kbd_input;
648 kbd_input = -1;
649 return ret_chr;
c609719b 650}
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