xref: /openbmc/u-boot/drivers/input/i8042.c (revision 71a988aa) 
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 #include <linux/compiler.h>
30 
31 #ifdef CONFIG_USE_CPCIDVI
32 extern u8 gt_cpcidvi_in8(u32 offset);
33 extern void gt_cpcidvi_out8(u32 offset, u8 data);
34 
35 #define in8(a)	   gt_cpcidvi_in8(a)
36 #define out8(a, b) gt_cpcidvi_out8(a, b)
37 #endif
38 
39 #include <i8042.h>
40 
41 /* defines */
42 
43 #ifdef CONFIG_CONSOLE_CURSOR
44 extern void console_cursor(int state);
45 static int blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
46 static int cursor_state;
47 #endif
48 
49 /* locals */
50 
51 static int  kbd_input	 = -1;		/* no input yet */
52 static int  kbd_mapping	 = KBD_US;	/* default US keyboard */
53 static int  kbd_flags	 = NORMAL;	/* after reset */
54 static int  kbd_state;			/* unshift code */
55 
56 static void kbd_conv_char(unsigned char scan_code);
57 static void kbd_led_set(void);
58 static void kbd_normal(unsigned char scan_code);
59 static void kbd_shift(unsigned char scan_code);
60 static void kbd_ctrl(unsigned char scan_code);
61 static void kbd_num(unsigned char scan_code);
62 static void kbd_caps(unsigned char scan_code);
63 static void kbd_scroll(unsigned char scan_code);
64 static void kbd_alt(unsigned char scan_code);
65 static int  kbd_input_empty(void);
66 static int  kbd_reset(void);
67 
68 static unsigned char kbd_fct_map[144] = {
69 	/* kbd_fct_map table for scan code */
70 	 0,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan  0- 7 */
71 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan  8- F */
72 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 10-17 */
73 	AS,  AS,  AS,  AS,  AS,  CN,  AS,  AS, /* scan 18-1F */
74 	AS,  AS,  AS,  AS,  AS,  AS,  AS,  AS, /* scan 20-27 */
75 	AS,  AS,  SH,  AS,  AS,  AS,  AS,  AS, /* scan 28-2F */
76 	AS,  AS,  AS,  AS,  AS,  AS,  SH,  AS, /* scan 30-37 */
77 	AS,  AS,  CP,   0,   0,   0,   0,   0, /* scan 38-3F */
78 	 0,   0,   0,   0,   0,  NM,  ST,  ES, /* scan 40-47 */
79 	ES,  ES,  ES,  ES,  ES,  ES,  ES,  ES, /* scan 48-4F */
80 	ES,  ES,  ES,  ES,   0,   0,  AS,   0, /* scan 50-57 */
81 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 58-5F */
82 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 60-67 */
83 	 0,   0,   0,   0,   0,   0,   0,   0, /* scan 68-6F */
84 	AS,   0,   0,  AS,   0,   0,  AS,   0, /* scan 70-77 */
85 	 0,  AS,   0,   0,   0,  AS,   0,   0, /* scan 78-7F */
86 	AS,  CN,  AS,  AS,  AK,  ST,  EX,  EX, /* enhanced */
87 	AS,  EX,  EX,  AS,  EX,  AS,  EX,  EX  /* enhanced */
88 	};
89 
90 static unsigned char kbd_key_map[2][5][144] = {
91 	{ /* US keyboard */
92 	{ /* unshift code */
93 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
94 	 '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan  8- F */
95 	 'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
96 	 'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
97 	 'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
98 	'\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
99 	 'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
100 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
101 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
102 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
103 	 '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
104 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
105 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
106 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
107 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
108 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
109 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
110 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
111 	},
112 	{ /* shift code */
113 	   0, 0x1b,  '!',  '@',  '#',  '$',  '%',  '^', /* scan  0- 7 */
114 	 '&',  '*',  '(',  ')',  '_',  '+', 0x08, '\t', /* scan  8- F */
115 	 'Q',  'W',  'E',  'R',  'T',  'Y',  'U',  'I', /* scan 10-17 */
116 	 'O',  'P',  '{',  '}', '\r',   CN,  'A',  'S', /* scan 18-1F */
117 	 'D',  'F',  'G',  'H',  'J',  'K',  'L',  ':', /* scan 20-27 */
118 	 '"',  '~',   SH,  '|',  'Z',  'X',  'C',  'V', /* scan 28-2F */
119 	 'B',  'N',  'M',  '<',  '>',  '?',   SH,  '*', /* scan 30-37 */
120 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
121 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
122 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
123 	 '2',  '3',  '0',  '.',    0,    0,    0,    0, /* scan 50-57 */
124 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
125 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
126 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
127 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
128 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
129 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
130 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
131 	},
132 	{ /* control code */
133 	0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan  0- 7 */
134 	0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan  8- F */
135 	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
136 	0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
137 	0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
138 	0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
139 	0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
140 	0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
141 	0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
142 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
143 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
144 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
145 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
146 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
147 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
148 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
149 	'\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
150 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
151 	},
152 	{ /* non numeric code */
153 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
154 	 '7',  '8',  '9',  '0',  '-',  '=', 0x08, '\t', /* scan  8- F */
155 	 'q',  'w',  'e',  'r',  't',  'y',  'u',  'i', /* scan 10-17 */
156 	 'o',  'p',  '[',  ']', '\r',   CN,  'a',  's', /* scan 18-1F */
157 	 'd',  'f',  'g',  'h',  'j',  'k',  'l',  ';', /* scan 20-27 */
158 	'\'',  '`',   SH, '\\',  'z',  'x',  'c',  'v', /* scan 28-2F */
159 	 'b',  'n',  'm',  ',',  '.',  '/',   SH,  '*', /* scan 30-37 */
160 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
161 	   0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
162 	 'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
163 	 'r',  's',  'p',  'n',    0,    0,    0,    0, /* scan 50-57 */
164 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
165 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
166 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
167 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
168 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
169 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
170 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
171 	},
172 	{ /* right alt mode - not used in US keyboard */
173 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan  0 - 7 */
174 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 8 - F */
175 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
176 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
177 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
178 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
179 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
180 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
181 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
182 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
183 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50 -57 */
184 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
185 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
186 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
187 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
188 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
189 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
190 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
191 	}
192 	},
193 	{ /* german keyboard */
194 	{ /* unshift code */
195 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
196 	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan  8- F */
197 	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
198 	 'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
199 	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
200 	0x84,  '^',   SH,  '#',  'y',  'x',  'c',  'v', /* scan 28-2F */
201 	 'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
202 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
203 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
204 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
205 	 '2',  '3',  '0',  ',',    0,    0,  '<',    0, /* scan 50-57 */
206 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
207 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
208 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
209 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
210 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
211 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
212 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
213 	},
214 	{ /* shift code */
215 	   0, 0x1b,  '!',  '"', 0x15,  '$',  '%',  '&', /* scan  0- 7 */
216 	 '/',  '(',  ')',  '=',  '?',  '`', 0x08, '\t', /* scan  8- F */
217 	 'Q',  'W',  'E',  'R',  'T',  'Z',  'U',  'I', /* scan 10-17 */
218 	 'O',  'P', 0x9a,  '*', '\r',   CN,  'A',  'S', /* scan 18-1F */
219 	 'D',  'F',  'G',  'H',  'J',  'K',  'L', 0x99, /* scan 20-27 */
220 	0x8e, 0xf8,   SH, '\'',  'Y',  'X',  'C',  'V', /* scan 28-2F */
221 	 'B',  'N',  'M',  ';',  ':',  '_',   SH,  '*', /* scan 30-37 */
222 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
223 	   0,    0,    0,    0,    0,   NM,   ST,  '7', /* scan 40-47 */
224 	 '8',  '9',  '-',  '4',  '5',  '6',  '+',  '1', /* scan 48-4F */
225 	 '2',  '3',  '0',  ',',    0,    0,  '>',    0, /* scan 50-57 */
226 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
227 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
228 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
229 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
230 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
231 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
232 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
233 	},
234 	{ /* control code */
235 	0xff, 0x1b, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, /* scan  0- 7 */
236 	0x1e, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, '\t', /* scan  8- F */
237 	0x11, 0x17, 0x05, 0x12, 0x14, 0x19, 0x15, 0x09, /* scan 10-17 */
238 	0x0f, 0x10, 0x1b, 0x1d, '\r',   CN, 0x01, 0x13, /* scan 18-1F */
239 	0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0c, 0xff, /* scan 20-27 */
240 	0xff, 0x1c,   SH, 0xff, 0x1a, 0x18, 0x03, 0x16, /* scan 28-2F */
241 	0x02, 0x0e, 0x0d, 0xff, 0xff, 0xff,   SH, 0xff, /* scan 30-37 */
242 	0xff, 0xff,   CP, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38-3F */
243 	0xff, 0xff, 0xff, 0xff, 0xff,   NM,   ST, 0xff, /* scan 40-47 */
244 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48-4F */
245 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 50-57 */
246 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58-5F */
247 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60-67 */
248 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68-6F */
249 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70-77 */
250 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78-7F */
251 	'\r',   CN,  '/',  '*',  ' ',   ST, 0xff, 0xff, /* extended */
252 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
253 	},
254 	{ /* non numeric code */
255 	   0, 0x1b,  '1',  '2',  '3',  '4',  '5',  '6', /* scan  0- 7 */
256 	 '7',  '8',  '9',  '0', 0xe1, '\'', 0x08, '\t', /* scan  8- F */
257 	 'q',  'w',  'e',  'r',  't',  'z',  'u',  'i', /* scan 10-17 */
258 	 'o',  'p', 0x81,  '+', '\r',   CN,  'a',  's', /* scan 18-1F */
259 	 'd',  'f',  'g',  'h',  'j',  'k',  'l', 0x94, /* scan 20-27 */
260 	0x84,  '^',   SH,    0,  'y',  'x',  'c',  'v', /* scan 28-2F */
261 	 'b',  'n',  'm',  ',',  '.',  '-',   SH,  '*', /* scan 30-37 */
262 	 ' ',  ' ',   CP,    0,    0,    0,    0,    0, /* scan 38-3F */
263 	   0,    0,    0,    0,    0,   NM,   ST,  'w', /* scan 40-47 */
264 	 'x',  'y',  'l',  't',  'u',  'v',  'm',  'q', /* scan 48-4F */
265 	 'r',  's',  'p',  'n',    0,    0,  '<',    0, /* scan 50-57 */
266 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 58-5F */
267 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 60-67 */
268 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 68-6F */
269 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 70-77 */
270 	   0,    0,    0,    0,    0,    0,    0,    0, /* scan 78-7F */
271 	'\r',   CN,  '/',  '*',  ' ',   ST,  'F',  'A', /* extended */
272 	   0,  'D',  'C',    0,  'B',    0,  '@',  'P'  /* extended */
273 	},
274 	{ /* Right alt mode - is used in German keyboard */
275 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan  0 - 7 */
276 	 '{',  '[',  ']',  '}', '\\', 0xff, 0xff, 0xff, /* scan  8 - F */
277 	 '@', 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 10 -17 */
278 	0xff, 0xff, 0xff,  '~', 0xff, 0xff, 0xff, 0xff, /* scan 18 -1F */
279 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 20 -27 */
280 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 28 -2F */
281 	0xff, 0xff, 0xe6, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 30 -37 */
282 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 38 -3F */
283 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 40 -47 */
284 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 48 -4F */
285 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff,  '|', 0xff, /* scan 50 -57 */
286 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 58 -5F */
287 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 60 -67 */
288 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 68 -6F */
289 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 70 -77 */
290 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* scan 78 -7F */
291 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* extended */
292 	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff  /* extended */
293 	}
294 	}
295 	};
296 
297 static unsigned char ext_key_map[] = {
298 	0x1c, /* keypad enter */
299 	0x1d, /* right control */
300 	0x35, /* keypad slash */
301 	0x37, /* print screen */
302 	0x38, /* right alt */
303 	0x46, /* break */
304 	0x47, /* editpad home */
305 	0x48, /* editpad up */
306 	0x49, /* editpad pgup */
307 	0x4b, /* editpad left */
308 	0x4d, /* editpad right */
309 	0x4f, /* editpad end */
310 	0x50, /* editpad dn */
311 	0x51, /* editpad pgdn */
312 	0x52, /* editpad ins */
313 	0x53, /* editpad del */
314 	0x00  /* map end */
315 	};
316 
317 /******************************************************************************/
318 
319 static int kbd_controller_present(void)
320 {
321 	return in8(I8042_STATUS_REG) != 0xff;
322 }
323 
324 /*
325  * Implement a weak default function for boards that optionally
326  * need to skip the i8042 initialization.
327  */
328 int __weak board_i8042_skip(void)
329 {
330 	/* As default, don't skip */
331 	return 0;
332 }
333 
334 void i8042_flush(void)
335 {
336 	int timeout;
337 
338 	/*
339 	 * The delay is to give the keyboard controller some time to fill the
340 	 * next byte.
341 	 */
342 	while (1) {
343 		timeout = 100;  /* wait for no longer than 100us */
344 		while (timeout > 0 && !(in8(I8042_STATUS_REG) & 0x01)) {
345 			udelay(1);
346 			timeout--;
347 		}
348 
349 		/* Try to pull next byte if not timeout. */
350 		if (in8(I8042_STATUS_REG) & 0x01)
351 			in8(I8042_DATA_REG);
352 		else
353 			break;
354 	}
355 }
356 
357 int i8042_disable(void)
358 {
359 	if (kbd_input_empty() == 0)
360 		return -1;
361 
362 	/* Disable keyboard */
363 	out8(I8042_COMMAND_REG, 0xad);
364 
365 	if (kbd_input_empty() == 0)
366 		return -1;
367 
368 	return 0;
369 }
370 
371 
372 /*******************************************************************************
373  *
374  * i8042_kbd_init - reset keyboard and init state flags
375  */
376 int i8042_kbd_init(void)
377 {
378 	int keymap, try;
379 	char *penv;
380 
381 	if (!kbd_controller_present() || board_i8042_skip())
382 		return -1;
383 
384 #ifdef CONFIG_USE_CPCIDVI
385 	penv = getenv("console");
386 	if (penv != NULL) {
387 		if (strncmp(penv, "serial", 7) == 0)
388 			return -1;
389 	}
390 #endif
391 	/* Init keyboard device (default US layout) */
392 	keymap = KBD_US;
393 	penv = getenv("keymap");
394 	if (penv != NULL) {
395 		if (strncmp(penv, "de", 3) == 0)
396 			keymap = KBD_GER;
397 	}
398 
399 	for (try = 0; try < KBD_RESET_TRIES; try++) {
400 		if (kbd_reset() == 0) {
401 			kbd_mapping = keymap;
402 			kbd_flags   = NORMAL;
403 			kbd_state   = 0;
404 			kbd_led_set();
405 			return 0;
406 		}
407 	}
408 	return -1;
409 }
410 
411 
412 /*******************************************************************************
413  *
414  * i8042_tstc - test if keyboard input is available
415  *		option: cursor blinking if called in a loop
416  */
417 int i8042_tstc(void)
418 {
419 	unsigned char scan_code = 0;
420 
421 #ifdef CONFIG_CONSOLE_CURSOR
422 	if (--blinkCount == 0) {
423 		cursor_state ^= 1;
424 		console_cursor(cursor_state);
425 		blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
426 		udelay(10);
427 	}
428 #endif
429 
430 	if ((in8(I8042_STATUS_REG) & 0x01) == 0) {
431 		return 0;
432 	} else {
433 		scan_code = in8(I8042_DATA_REG);
434 		if (scan_code == 0xfa)
435 			return 0;
436 
437 		kbd_conv_char(scan_code);
438 
439 		if (kbd_input != -1)
440 			return 1;
441 	}
442 	return 0;
443 }
444 
445 
446 /*******************************************************************************
447  *
448  * i8042_getc - wait till keyboard input is available
449  *		option: turn on/off cursor while waiting
450  */
451 int i8042_getc(void)
452 {
453 	int ret_chr;
454 	unsigned char scan_code;
455 
456 	while (kbd_input == -1) {
457 		while ((in8(I8042_STATUS_REG) & 0x01) == 0) {
458 #ifdef CONFIG_CONSOLE_CURSOR
459 			if (--blinkCount == 0) {
460 				cursor_state ^= 1;
461 				console_cursor(cursor_state);
462 				blinkCount = CONFIG_SYS_CONSOLE_BLINK_COUNT;
463 			}
464 			udelay(10);
465 #endif
466 		}
467 		scan_code = in8(I8042_DATA_REG);
468 		if (scan_code != 0xfa)
469 			kbd_conv_char (scan_code);
470 	}
471 	ret_chr = kbd_input;
472 	kbd_input = -1;
473 	return ret_chr;
474 }
475 
476 
477 /******************************************************************************/
478 
479 static void kbd_conv_char(unsigned char scan_code)
480 {
481 	if (scan_code == 0xe0) {
482 		kbd_flags |= EXT;
483 		return;
484 	}
485 
486 	/* if high bit of scan_code, set break flag */
487 	if (scan_code & 0x80)
488 		kbd_flags |=  BRK;
489 	else
490 		kbd_flags &= ~BRK;
491 
492 	if ((scan_code == 0xe1) || (kbd_flags & E1)) {
493 		if (scan_code == 0xe1) {
494 			kbd_flags ^= BRK;    /* reset the break flag */
495 			kbd_flags ^= E1;     /* bitwise EXOR with E1 flag */
496 		}
497 		return;
498 	}
499 
500 	scan_code &= 0x7f;
501 
502 	if (kbd_flags & EXT) {
503 		int i;
504 
505 		kbd_flags ^= EXT;
506 		for (i = 0; ext_key_map[i]; i++) {
507 			if (ext_key_map[i] == scan_code) {
508 				scan_code = 0x80 + i;
509 				break;
510 			}
511 		}
512 		/* not found ? */
513 		if (!ext_key_map[i])
514 			return;
515 	}
516 
517 	switch (kbd_fct_map[scan_code]) {
518 	case AS:
519 		kbd_normal(scan_code);
520 		break;
521 	case SH:
522 		kbd_shift(scan_code);
523 		break;
524 	case CN:
525 		kbd_ctrl(scan_code);
526 		break;
527 	case NM:
528 		kbd_num(scan_code);
529 		break;
530 	case CP:
531 		kbd_caps(scan_code);
532 		break;
533 	case ST:
534 		kbd_scroll(scan_code);
535 		break;
536 	case AK:
537 		kbd_alt(scan_code);
538 		break;
539 	}
540 	return;
541 }
542 
543 
544 /******************************************************************************/
545 
546 static void kbd_normal(unsigned char scan_code)
547 {
548 	unsigned char chr;
549 
550 	if ((kbd_flags & BRK) == NORMAL) {
551 		chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
552 		if ((chr == 0xff) || (chr == 0x00))
553 			return;
554 
555 		/* if caps lock convert upper to lower */
556 		if (((kbd_flags & CAPS) == CAPS) &&
557 				(chr >= 'a' && chr <= 'z')) {
558 			chr -= 'a' - 'A';
559 		}
560 		kbd_input = chr;
561 	}
562 }
563 
564 
565 /******************************************************************************/
566 
567 static void kbd_shift(unsigned char scan_code)
568 {
569 	if ((kbd_flags & BRK) == BRK) {
570 		kbd_state = AS;
571 		kbd_flags &= (~SHIFT);
572 	} else {
573 		kbd_state = SH;
574 		kbd_flags |= SHIFT;
575 	}
576 }
577 
578 
579 /******************************************************************************/
580 
581 static void kbd_ctrl(unsigned char scan_code)
582 {
583 	if ((kbd_flags & BRK) == BRK) {
584 		kbd_state = AS;
585 		kbd_flags &= (~CTRL);
586 	} else {
587 		kbd_state = CN;
588 		kbd_flags |= CTRL;
589 	}
590 }
591 
592 
593 /******************************************************************************/
594 
595 static void kbd_caps(unsigned char scan_code)
596 {
597 	if ((kbd_flags & BRK) == NORMAL) {
598 		kbd_flags ^= CAPS;
599 		kbd_led_set();    /* update keyboard LED */
600 	}
601 }
602 
603 
604 /******************************************************************************/
605 
606 static void kbd_num(unsigned char scan_code)
607 {
608 	if ((kbd_flags & BRK) == NORMAL) {
609 		kbd_flags ^= NUM;
610 		kbd_state = (kbd_flags & NUM) ? AS : NM;
611 		kbd_led_set();    /* update keyboard LED */
612 	}
613 }
614 
615 
616 /******************************************************************************/
617 
618 static void kbd_scroll(unsigned char scan_code)
619 {
620 	if ((kbd_flags & BRK) == NORMAL) {
621 		kbd_flags ^= STP;
622 		kbd_led_set();    /* update keyboard LED */
623 		if (kbd_flags & STP)
624 			kbd_input = 0x13;
625 		else
626 			kbd_input = 0x11;
627 	}
628 }
629 
630 /******************************************************************************/
631 
632 static void kbd_alt(unsigned char scan_code)
633 {
634 	if ((kbd_flags & BRK) == BRK) {
635 		kbd_state = AS;
636 		kbd_flags &= (~ALT);
637 	} else {
638 		kbd_state = AK;
639 		kbd_flags &= ALT;
640 	}
641 }
642 
643 
644 /******************************************************************************/
645 
646 static void kbd_led_set(void)
647 {
648 	kbd_input_empty();
649 	out8(I8042_DATA_REG, 0xed);    /* SET LED command */
650 	kbd_input_empty();
651 	out8(I8042_DATA_REG, (kbd_flags & 0x7));    /* LED bits only */
652 }
653 
654 
655 /******************************************************************************/
656 
657 static int kbd_input_empty(void)
658 {
659 	int kbdTimeout = KBD_TIMEOUT * 1000;
660 
661 	while ((in8(I8042_STATUS_REG) & I8042_STATUS_IN_DATA) && kbdTimeout--)
662 		udelay(1);
663 
664 	return kbdTimeout != -1;
665 }
666 
667 /******************************************************************************/
668 
669 static int wait_until_kbd_output_full(void)
670 {
671 	int kbdTimeout = KBD_TIMEOUT * 1000;
672 
673 	while (((in8(I8042_STATUS_REG) & 0x01) == 0) && kbdTimeout--)
674 		udelay(1);
675 
676 	return kbdTimeout != -1;
677 }
678 
679 /******************************************************************************/
680 
681 static int kbd_reset(void)
682 {
683 	/* KB Reset */
684 	if (kbd_input_empty() == 0)
685 		return -1;
686 
687 	out8(I8042_DATA_REG, 0xff);
688 
689 	if (wait_until_kbd_output_full() == 0)
690 		return -1;
691 
692 	if (in8(I8042_DATA_REG) != 0xfa) /* ACK */
693 		return -1;
694 
695 	if (wait_until_kbd_output_full() == 0)
696 		return -1;
697 
698 	if (in8(I8042_DATA_REG) != 0xaa) /* Test Pass*/
699 		return -1;
700 
701 	if (kbd_input_empty() == 0)
702 		return -1;
703 
704 	/* Set KBC mode */
705 	out8(I8042_COMMAND_REG, 0x60);
706 
707 	if (kbd_input_empty() == 0)
708 		return -1;
709 
710 	out8(I8042_DATA_REG, 0x45);
711 
712 	if (kbd_input_empty() == 0)
713 		return -1;
714 
715 	/* Enable Keyboard */
716 	out8(I8042_COMMAND_REG, 0xae);
717 
718 	if (kbd_input_empty() == 0)
719 		return -1;
720 
721 	return 0;
722 }
723