xref: /openbmc/u-boot/drivers/input/i8042.c (revision 4e3349b6) 
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 static int kbd_controller_present(void)
319 {
320 	return in8(I8042_STATUS_REG) != 0xff;
321 }
322 
323 /*******************************************************************************
324  *
325  * i8042_kbd_init - reset keyboard and init state flags
326  */
327 int i8042_kbd_init(void)
328 {
329 	int keymap, try;
330 	char *penv;
331 
332 	if (!kbd_controller_present())
333 		return -1;
334 
335 #ifdef CONFIG_USE_CPCIDVI
336 	penv = getenv("console");
337 	if (penv != NULL) {
338 		if (strncmp(penv, "serial", 7) == 0)
339 			return -1;
340 	}
341 #endif
342 	/* Init keyboard device (default US layout) */
343 	keymap = KBD_US;
344 	penv = getenv("keymap");
345 	if (penv != NULL) {
346 		if (strncmp(penv, "de", 3) == 0)
347 			keymap = KBD_GER;
348 	}
349 
350 	for (try = 0; try < KBD_RESET_TRIES; try++) {
351 		if (kbd_reset() == 0) {
352 			kbd_mapping = keymap;
353 			kbd_flags   = NORMAL;
354 			kbd_state   = 0;
355 			kbd_led_set();
356 			return 0;
357 		}
358 	}
359 	return -1;
360 }
361 
362 
363 /*******************************************************************************
364  *
365  * i8042_tstc - test if keyboard input is available
366  *		option: cursor blinking if called in a loop
367  */
368 int i8042_tstc(void)
369 {
370 	unsigned char scan_code = 0;
371 
372 #ifdef CONFIG_CONSOLE_CURSOR
373 	if (--blinkCount == 0) {
374 		cursor_state ^= 1;
375 		console_cursor(cursor_state);
376 		blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
377 		udelay(10);
378 	}
379 #endif
380 
381 	if ((in8(I8042_STATUS_REG) & 0x01) == 0) {
382 		return 0;
383 	} else {
384 		scan_code = in8(I8042_DATA_REG);
385 		if (scan_code == 0xfa)
386 			return 0;
387 
388 		kbd_conv_char(scan_code);
389 
390 		if (kbd_input != -1)
391 			return 1;
392 	}
393 	return 0;
394 }
395 
396 
397 /*******************************************************************************
398  *
399  * i8042_getc - wait till keyboard input is available
400  *		option: turn on/off cursor while waiting
401  */
402 int i8042_getc(void)
403 {
404 	int ret_chr;
405 	unsigned char scan_code;
406 
407 	while (kbd_input == -1) {
408 		while ((in8(I8042_STATUS_REG) & 0x01) == 0) {
409 #ifdef CONFIG_CONSOLE_CURSOR
410 			if (--blinkCount == 0) {
411 				cursor_state ^= 1;
412 				console_cursor(cursor_state);
413 				blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
414 			}
415 			udelay(10);
416 #endif
417 		}
418 		scan_code = in8(I8042_DATA_REG);
419 		if (scan_code != 0xfa)
420 			kbd_conv_char (scan_code);
421 	}
422 	ret_chr = kbd_input;
423 	kbd_input = -1;
424 	return ret_chr;
425 }
426 
427 
428 /******************************************************************************/
429 
430 static void kbd_conv_char(unsigned char scan_code)
431 {
432 	if (scan_code == 0xe0) {
433 		kbd_flags |= EXT;
434 		return;
435 	}
436 
437 	/* if high bit of scan_code, set break flag */
438 	if (scan_code & 0x80)
439 		kbd_flags |=  BRK;
440 	else
441 		kbd_flags &= ~BRK;
442 
443 	if ((scan_code == 0xe1) || (kbd_flags & E1)) {
444 		if (scan_code == 0xe1) {
445 			kbd_flags ^= BRK;    /* reset the break flag */
446 			kbd_flags ^= E1;     /* bitwise EXOR with E1 flag */
447 		}
448 		return;
449 	}
450 
451 	scan_code &= 0x7f;
452 
453 	if (kbd_flags & EXT) {
454 		int i;
455 
456 		kbd_flags ^= EXT;
457 		for (i = 0; ext_key_map[i]; i++) {
458 			if (ext_key_map[i] == scan_code) {
459 				scan_code = 0x80 + i;
460 				break;
461 			}
462 		}
463 		/* not found ? */
464 		if (!ext_key_map[i])
465 			return;
466 	}
467 
468 	switch (kbd_fct_map[scan_code]) {
469 	case AS:
470 		kbd_normal(scan_code);
471 		break;
472 	case SH:
473 		kbd_shift(scan_code);
474 		break;
475 	case CN:
476 		kbd_ctrl(scan_code);
477 		break;
478 	case NM:
479 		kbd_num(scan_code);
480 		break;
481 	case CP:
482 		kbd_caps(scan_code);
483 		break;
484 	case ST:
485 		kbd_scroll(scan_code);
486 		break;
487 	case AK:
488 		kbd_alt(scan_code);
489 		break;
490 	}
491 	return;
492 }
493 
494 
495 /******************************************************************************/
496 
497 static void kbd_normal(unsigned char scan_code)
498 {
499 	unsigned char chr;
500 
501 	if ((kbd_flags & BRK) == NORMAL) {
502 		chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
503 		if ((chr == 0xff) || (chr == 0x00))
504 			return;
505 
506 		/* if caps lock convert upper to lower */
507 		if (((kbd_flags & CAPS) == CAPS) &&
508 				(chr >= 'a' && chr <= 'z')) {
509 			chr -= 'a' - 'A';
510 		}
511 		kbd_input = chr;
512 	}
513 }
514 
515 
516 /******************************************************************************/
517 
518 static void kbd_shift(unsigned char scan_code)
519 {
520 	if ((kbd_flags & BRK) == BRK) {
521 		kbd_state = AS;
522 		kbd_flags &= (~SHIFT);
523 	} else {
524 		kbd_state = SH;
525 		kbd_flags |= SHIFT;
526 	}
527 }
528 
529 
530 /******************************************************************************/
531 
532 static void kbd_ctrl(unsigned char scan_code)
533 {
534 	if ((kbd_flags & BRK) == BRK) {
535 		kbd_state = AS;
536 		kbd_flags &= (~CTRL);
537 	} else {
538 		kbd_state = CN;
539 		kbd_flags |= CTRL;
540 	}
541 }
542 
543 
544 /******************************************************************************/
545 
546 static void kbd_caps(unsigned char scan_code)
547 {
548 	if ((kbd_flags & BRK) == NORMAL) {
549 		kbd_flags ^= CAPS;
550 		kbd_led_set();    /* update keyboard LED */
551 	}
552 }
553 
554 
555 /******************************************************************************/
556 
557 static void kbd_num(unsigned char scan_code)
558 {
559 	if ((kbd_flags & BRK) == NORMAL) {
560 		kbd_flags ^= NUM;
561 		kbd_state = (kbd_flags & NUM) ? AS : NM;
562 		kbd_led_set();    /* update keyboard LED */
563 	}
564 }
565 
566 
567 /******************************************************************************/
568 
569 static void kbd_scroll(unsigned char scan_code)
570 {
571 	if ((kbd_flags & BRK) == NORMAL) {
572 		kbd_flags ^= STP;
573 		kbd_led_set();    /* update keyboard LED */
574 		if (kbd_flags & STP)
575 			kbd_input = 0x13;
576 		else
577 			kbd_input = 0x11;
578 	}
579 }
580 
581 /******************************************************************************/
582 
583 static void kbd_alt(unsigned char scan_code)
584 {
585 	if ((kbd_flags & BRK) == BRK) {
586 		kbd_state = AS;
587 		kbd_flags &= (~ALT);
588 	} else {
589 		kbd_state = AK;
590 		kbd_flags &= ALT;
591 	}
592 }
593 
594 
595 /******************************************************************************/
596 
597 static void kbd_led_set(void)
598 {
599 	kbd_input_empty();
600 	out8(I8042_DATA_REG, 0xed);    /* SET LED command */
601 	kbd_input_empty();
602 	out8(I8042_DATA_REG, (kbd_flags & 0x7));    /* LED bits only */
603 }
604 
605 
606 /******************************************************************************/
607 
608 static int kbd_input_empty(void)
609 {
610 	int kbdTimeout = KBD_TIMEOUT;
611 
612 	/* wait for input buf empty */
613 	while ((in8(I8042_STATUS_REG) & 0x02) && kbdTimeout--)
614 		udelay(1000);
615 
616 	return kbdTimeout != -1;
617 }
618 
619 /******************************************************************************/
620 
621 static int kbd_reset(void)
622 {
623 	if (kbd_input_empty() == 0)
624 		return -1;
625 
626 	out8(I8042_DATA_REG, 0xff);
627 
628 	udelay(250000);
629 
630 	if (kbd_input_empty() == 0)
631 		return -1;
632 
633 #ifdef CONFIG_USE_CPCIDVI
634 	out8(I8042_COMMAND_REG, 0x60);
635 #else
636 	out8(I8042_DATA_REG, 0x60);
637 #endif
638 
639 	if (kbd_input_empty() == 0)
640 		return -1;
641 
642 	out8(I8042_DATA_REG, 0x45);
643 
644 
645 	if (kbd_input_empty() == 0)
646 		return -1;
647 
648 	out8(I8042_COMMAND_REG, 0xae);
649 
650 	if (kbd_input_empty() == 0)
651 		return -1;
652 
653 	return 0;
654 }
655