xref: /openbmc/u-boot/drivers/input/i8042.c (revision dd4a5b22) 
1 /*
2  * (C) Copyright 2002 ELTEC Elektronik AG
3  * Frank Gottschling <fgottschling@eltec.de>
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 /* i8042.c - Intel 8042 keyboard driver routines */
25 
26 /* includes */
27 
28 #include <common.h>
29 
30 #ifdef CONFIG_USE_CPCIDVI
31 extern u8 gt_cpcidvi_in8(u32 offset);
32 extern void gt_cpcidvi_out8(u32 offset, u8 data);
33 
34 #define in8(a)	   gt_cpcidvi_in8(a)
35 #define out8(a, b) gt_cpcidvi_out8(a, b)
36 #endif
37 
38 #include <i8042.h>
39 
40 /* defines */
41 
42 #ifdef CONFIG_CONSOLE_CURSOR
43 extern void console_cursor(int state);
44 static int blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
45 static int cursor_state;
46 #endif
47 
48 /* locals */
49 
50 static int  kbd_input	 = -1;		/* no input yet */
51 static int  kbd_mapping	 = KBD_US;	/* default US keyboard */
52 static int  kbd_flags	 = NORMAL;	/* after reset */
53 static int  kbd_state;			/* unshift code */
54 
55 static void kbd_conv_char(unsigned char scan_code);
56 static void kbd_led_set(void);
57 static void kbd_normal(unsigned char scan_code);
58 static void kbd_shift(unsigned char scan_code);
59 static void kbd_ctrl(unsigned char scan_code);
60 static void kbd_num(unsigned char scan_code);
61 static void kbd_caps(unsigned char scan_code);
62 static void kbd_scroll(unsigned char scan_code);
63 static void kbd_alt(unsigned char scan_code);
64 static int  kbd_input_empty(void);
65 static int  kbd_reset(void);
66 
67 static unsigned char kbd_fct_map[144] = {
68 	/* kbd_fct_map table for scan code */
69 	 0,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan  0- 7 */
70 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan  8- F */
71 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 10-17 */
72 	AS,  AS,  AS,  AS,  AS,  CN,  AS,  AS, /* scan 18-1F */
73 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 20-27 */
74 	AS,  AS,  SH,  AS,  AS,  AS,  AS,  AS, /* scan 28-2F */
75 	AS,  AS,  AS,  AS,  AS,  AS,  SH,  AS, /* scan 30-37 */
76 	AS,  AS,  CP,   0,   0,   0,   0,   0, /* scan 38-3F */
77 	 0,   0,   0,   0,   0,  NM,  ST,  ES, /* scan 40-47 */
78 	ES,  ES,  ES,  ES,  ES,  ES,  ES,  ES, /* scan 48-4F */
79 	ES,  ES,  ES,  ES,   0,   0,  AS,   0, /* scan 50-57 */
80 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 58-5F */
81 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 60-67 */
82 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 68-6F */
83 	AS,   0,   0,  AS,   0,   0,  AS,   0, /* scan 70-77 */
84 	 0,  AS,   0,   0,   0,  AS,   0,   0, /* scan 78-7F */
85 	AS,  CN,  AS,  AS,  AK,  ST,  EX,  EX, /* enhanced */
86 	AS,  EX,  EX,  AS,  EX,  AS,  EX,  EX  /* enhanced */
87 	};
88 
89 static unsigned char kbd_key_map[2][5][144] = {
90 	{ /* US keyboard */
91 	{ /* unshift code */
92 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
93 	 '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan  8- F */
94 	 'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
95 	 'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
96 	 'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
97 	'\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
98 	 'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
99 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
100 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
101 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
102 	 '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
103 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
104 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
105 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
106 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
107 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
108 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
109 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
110 	},
111 	{ /* shift code */
112 	   0, 0x1b,  '!',  '@',  '#',  '$',  '%',  '^', /* scan  0- 7 */
113 	 '&',  '*',  '(',  ')',  '_',  '+', 0x08, '\t', /* scan  8- F */
114 	 'Q',  'W',  'E',  'R',  'T',  'Y',  'U',  'I', /* scan 10-17 */
115 	 'O',  'P',  '{',  '}', '\r',   CN,  'A',  'S', /* scan 18-1F */
116 	 'D',  'F',  'G',  'H',  'J',  'K',  'L',  ':', /* scan 20-27 */
117 	 '"',  '~',   SH,  '|',  'Z',  'X',  'C',  'V', /* scan 28-2F */
118 	 'B',  'N',  'M',  '<',  '>',  '?',   SH,  '*', /* scan 30-37 */
119 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
120 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
121 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
122 	 '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
123 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
124 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
125 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
126 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
127 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
128 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
129 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
130 	},
131 	{ /* control code */
132 	0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan  0- 7 */
133 	0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan  8- F */
134 	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
135 	0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
136 	0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
137 	0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
138 	0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
139 	0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
140 	0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
141 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
142 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
143 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
144 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
145 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
146 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
147 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
148 	'\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
149 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
150 	},
151 	{ /* non numeric code */
152 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
153 	 '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan  8- F */
154 	 'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
155 	 'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
156 	 'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
157 	'\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
158 	 'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
159 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
160 	   0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
161 	 'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
162 	 'r',  's',  'p',  'n',    0,    0,    0,    0, /* scan 50-57 */
163 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
164 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
165 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
166 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
167 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
168 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
169 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
170 	},
171 	{ /* right alt mode - not used in US keyboard */
172 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan  0 - 7 */
173 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 8 - F */
174 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
175 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
176 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
177 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
178 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
179 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
180 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
181 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
182 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50 -57 */
183 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
184 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
185 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
186 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
187 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
188 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
189 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
190 	}
191 	},
192 	{ /* german keyboard */
193 	{ /* unshift code */
194 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
195 	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan  8- F */
196 	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
197 	 'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
198 	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
199 	0x84,  '^',   SH,  '#',  'y',  'x',  'c',  'v', /* scan 28-2F */
200 	 'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
201 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
202 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
203 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
204 	 '2',  '3',  '0',  ',',    0,    0,  '<',    0, /* scan 50-57 */
205 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
206 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
207 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
208 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
209 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
210 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
211 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
212 	},
213 	{ /* shift code */
214 	   0, 0x1b,  '!',  '"', 0x15,  '$',  '%',  '&', /* scan  0- 7 */
215 	 '/',  '(',  ')',  '=',  '?',  '`', 0x08, '\t', /* scan  8- F */
216 	 'Q',  'W',  'E',  'R',  'T',  'Z',  'U',  'I', /* scan 10-17 */
217 	 'O',  'P', 0x9a,  '*', '\r',   CN,  'A',  'S', /* scan 18-1F */
218 	 'D',  'F',  'G',  'H',  'J',  'K',  'L', 0x99, /* scan 20-27 */
219 	0x8e, 0xf8,   SH, '\'',  'Y',  'X',  'C',  'V', /* scan 28-2F */
220 	 'B',  'N',  'M',  ';',  ':',  '_',   SH,  '*', /* scan 30-37 */
221 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
222 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
223 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
224 	 '2',  '3',  '0',  ',',    0,    0,  '>',    0, /* scan 50-57 */
225 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
226 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
227 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
228 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
229 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
230 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
231 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
232 	},
233 	{ /* control code */
234 	0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan  0- 7 */
235 	0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan  8- F */
236 	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
237 	0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
238 	0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
239 	0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
240 	0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
241 	0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
242 	0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
243 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
244 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
245 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
246 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
247 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
248 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
249 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
250 	'\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
251 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
252 	},
253 	{ /* non numeric code */
254 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
255 	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan  8- F */
256 	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
257 	 'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
258 	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
259 	0x84,  '^',   SH,    0,  'y',  'x',  'c',  'v', /* scan 28-2F */
260 	 'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
261 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
262 	   0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
263 	 'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
264 	 'r',  's',  'p',  'n',    0,    0,  '<',    0, /* scan 50-57 */
265 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
266 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
267 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
268 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
269 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
270 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
271 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
272 	},
273 	{ /* Right alt mode - is used in German keyboard */
274 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan  0 - 7 */
275 	 '{',  '[',  ']',  '}', '\\', 0xff, 0xff, 0xff, /* scan  8 - F */
276 	 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
277 	0xff, 0xff, 0xff,  '~', 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
278 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
279 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
280 	0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
281 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
282 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
283 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
284 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '|', 0xff, /* scan 50 -57 */
285 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
286 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
287 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
288 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
289 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
290 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
291 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
292 	}
293 	}
294 	};
295 
296 static unsigned char ext_key_map[] = {
297 	0x1c, /* keypad enter */
298 	0x1d, /* right control */
299 	0x35, /* keypad slash */
300 	0x37, /* print screen */
301 	0x38, /* right alt */
302 	0x46, /* break */
303 	0x47, /* editpad home */
304 	0x48, /* editpad up */
305 	0x49, /* editpad pgup */
306 	0x4b, /* editpad left */
307 	0x4d, /* editpad right */
308 	0x4f, /* editpad end */
309 	0x50, /* editpad dn */
310 	0x51, /* editpad pgdn */
311 	0x52, /* editpad ins */
312 	0x53, /* editpad del */
313 	0x00  /* map end */
314 	};
315 
316 /*******************************************************************************
317  *
318  * i8042_kbd_init - reset keyboard and init state flags
319  */
320 int i8042_kbd_init(void)
321 {
322 	int keymap, try;
323 	char *penv;
324 
325 #ifdef CONFIG_USE_CPCIDVI
326 	penv = getenv("console");
327 	if (penv != NULL) {
328 		if (strncmp(penv, "serial", 7) == 0)
329 			return -1;
330 	}
331 #endif
332 	/* Init keyboard device (default US layout) */
333 	keymap = KBD_US;
334 	penv = getenv("keymap");
335 	if (penv != NULL) {
336 		if (strncmp(penv, "de", 3) == 0)
337 			keymap = KBD_GER;
338 	}
339 
340 	for (try = 0; try < KBD_RESET_TRIES; try++) {
341 		if (kbd_reset() == 0) {
342 			kbd_mapping = keymap;
343 			kbd_flags   = NORMAL;
344 			kbd_state   = 0;
345 			kbd_led_set();
346 			return 0;
347 		}
348 	}
349 	return -1;
350 }
351 
352 
353 /*******************************************************************************
354  *
355  * i8042_tstc - test if keyboard input is available
356  *		option: cursor blinking if called in a loop
357  */
358 int i8042_tstc(void)
359 {
360 	unsigned char scan_code = 0;
361 
362 #ifdef CONFIG_CONSOLE_CURSOR
363 	if (--blinkCount == 0) {
364 		cursor_state ^= 1;
365 		console_cursor(cursor_state);
366 		blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
367 		udelay(10);
368 	}
369 #endif
370 
371 	if ((in8(I8042_STATUS_REG) & 0x01) == 0) {
372 		return 0;
373 	} else {
374 		scan_code = in8(I8042_DATA_REG);
375 		if (scan_code == 0xfa)
376 			return 0;
377 
378 		kbd_conv_char(scan_code);
379 
380 		if (kbd_input != -1)
381 			return 1;
382 	}
383 	return 0;
384 }
385 
386 
387 /*******************************************************************************
388  *
389  * i8042_getc - wait till keyboard input is available
390  *		option: turn on/off cursor while waiting
391  */
392 int i8042_getc(void)
393 {
394 	int ret_chr;
395 	unsigned char scan_code;
396 
397 	while (kbd_input == -1) {
398 		while ((in8(I8042_STATUS_REG) & 0x01) == 0) {
399 #ifdef CONFIG_CONSOLE_CURSOR
400 			if (--blinkCount == 0) {
401 				cursor_state ^= 1;
402 				console_cursor(cursor_state);
403 				blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
404 			}
405 			udelay(10);
406 #endif
407 		}
408 		scan_code = in8(I8042_DATA_REG);
409 		if (scan_code != 0xfa)
410 			kbd_conv_char (scan_code);
411 	}
412 	ret_chr = kbd_input;
413 	kbd_input = -1;
414 	return ret_chr;
415 }
416 
417 
418 /******************************************************************************/
419 
420 static void kbd_conv_char(unsigned char scan_code)
421 {
422 	if (scan_code == 0xe0) {
423 		kbd_flags |= EXT;
424 		return;
425 	}
426 
427 	/* if high bit of scan_code, set break flag */
428 	if (scan_code & 0x80)
429 		kbd_flags |=  BRK;
430 	else
431 		kbd_flags &= ~BRK;
432 
433 	if ((scan_code == 0xe1) || (kbd_flags & E1)) {
434 		if (scan_code == 0xe1) {
435 			kbd_flags ^= BRK;    /* reset the break flag */
436 			kbd_flags ^= E1;     /* bitwise EXOR with E1 flag */
437 		}
438 		return;
439 	}
440 
441 	scan_code &= 0x7f;
442 
443 	if (kbd_flags & EXT) {
444 		int i;
445 
446 		kbd_flags ^= EXT;
447 		for (i = 0; ext_key_map[i]; i++) {
448 			if (ext_key_map[i] == scan_code) {
449 				scan_code = 0x80 + i;
450 				break;
451 			}
452 		}
453 		/* not found ? */
454 		if (!ext_key_map[i])
455 			return;
456 	}
457 
458 	switch (kbd_fct_map[scan_code]) {
459 	case AS:
460 		kbd_normal(scan_code);
461 		break;
462 	case SH:
463 		kbd_shift(scan_code);
464 		break;
465 	case CN:
466 		kbd_ctrl(scan_code);
467 		break;
468 	case NM:
469 		kbd_num(scan_code);
470 		break;
471 	case CP:
472 		kbd_caps(scan_code);
473 		break;
474 	case ST:
475 		kbd_scroll(scan_code);
476 		break;
477 	case AK:
478 		kbd_alt(scan_code);
479 		break;
480 	}
481 	return;
482 }
483 
484 
485 /******************************************************************************/
486 
487 static void kbd_normal(unsigned char scan_code)
488 {
489 	unsigned char chr;
490 
491 	if ((kbd_flags & BRK) == NORMAL) {
492 		chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
493 		if ((chr == 0xff) || (chr == 0x00))
494 			return;
495 
496 		/* if caps lock convert upper to lower */
497 		if (((kbd_flags & CAPS) == CAPS) &&
498 				(chr >= 'a' && chr <= 'z')) {
499 			chr -= 'a' - 'A';
500 		}
501 		kbd_input = chr;
502 	}
503 }
504 
505 
506 /******************************************************************************/
507 
508 static void kbd_shift(unsigned char scan_code)
509 {
510 	if ((kbd_flags & BRK) == BRK) {
511 		kbd_state = AS;
512 		kbd_flags &= (~SHIFT);
513 	} else {
514 		kbd_state = SH;
515 		kbd_flags |= SHIFT;
516 	}
517 }
518 
519 
520 /******************************************************************************/
521 
522 static void kbd_ctrl(unsigned char scan_code)
523 {
524 	if ((kbd_flags & BRK) == BRK) {
525 		kbd_state = AS;
526 		kbd_flags &= (~CTRL);
527 	} else {
528 		kbd_state = CN;
529 		kbd_flags |= CTRL;
530 	}
531 }
532 
533 
534 /******************************************************************************/
535 
536 static void kbd_caps(unsigned char scan_code)
537 {
538 	if ((kbd_flags & BRK) == NORMAL) {
539 		kbd_flags ^= CAPS;
540 		kbd_led_set();    /* update keyboard LED */
541 	}
542 }
543 
544 
545 /******************************************************************************/
546 
547 static void kbd_num(unsigned char scan_code)
548 {
549 	if ((kbd_flags & BRK) == NORMAL) {
550 		kbd_flags ^= NUM;
551 		kbd_state = (kbd_flags & NUM) ? AS : NM;
552 		kbd_led_set();    /* update keyboard LED */
553 	}
554 }
555 
556 
557 /******************************************************************************/
558 
559 static void kbd_scroll(unsigned char scan_code)
560 {
561 	if ((kbd_flags & BRK) == NORMAL) {
562 		kbd_flags ^= STP;
563 		kbd_led_set();    /* update keyboard LED */
564 		if (kbd_flags & STP)
565 			kbd_input = 0x13;
566 		else
567 			kbd_input = 0x11;
568 	}
569 }
570 
571 /******************************************************************************/
572 
573 static void kbd_alt(unsigned char scan_code)
574 {
575 	if ((kbd_flags & BRK) == BRK) {
576 		kbd_state = AS;
577 		kbd_flags &= (~ALT);
578 	} else {
579 		kbd_state = AK;
580 		kbd_flags &= ALT;
581 	}
582 }
583 
584 
585 /******************************************************************************/
586 
587 static void kbd_led_set(void)
588 {
589 	kbd_input_empty();
590 	out8(I8042_DATA_REG, 0xed);    /* SET LED command */
591 	kbd_input_empty();
592 	out8(I8042_DATA_REG, (kbd_flags & 0x7));    /* LED bits only */
593 }
594 
595 
596 /******************************************************************************/
597 
598 static int kbd_input_empty(void)
599 {
600 	int kbdTimeout = KBD_TIMEOUT;
601 
602 	/* wait for input buf empty */
603 	while ((in8(I8042_STATUS_REG) & 0x02) && kbdTimeout--)
604 		udelay(1000);
605 
606 	return kbdTimeout;
607 }
608 
609 /******************************************************************************/
610 
611 static int kbd_reset(void)
612 {
613 	if (kbd_input_empty() == 0)
614 		return -1;
615 
616 	out8(I8042_DATA_REG, 0xff);
617 
618 	udelay(250000);
619 
620 	if (kbd_input_empty() == 0)
621 		return -1;
622 
623 #ifdef CONFIG_USE_CPCIDVI
624 	out8(I8042_COMMAND_REG, 0x60);
625 #else
626 	out8(I8042_DATA_REG, 0x60);
627 #endif
628 
629 	if (kbd_input_empty() == 0)
630 		return -1;
631 
632 	out8(I8042_DATA_REG, 0x45);
633 
634 
635 	if (kbd_input_empty() == 0)
636 		return -1;
637 
638 	out8(I8042_COMMAND_REG, 0xae);
639 
640 	if (kbd_input_empty() == 0)
641 		return -1;
642 
643 	return 0;
644 }
645