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1/***********************************************************************
2 *
3 * (C) Copyright 2004
4 * DENX Software Engineering
5 * Wolfgang Denk, wd@denx.de
6 * All rights reserved.
7 *
8 * Keyboard driver
9 *
10 ***********************************************************************/
11
12#include <common.h>
13
14#ifdef CONFIG_PS2KBD
15
16#include <devices.h>
17#include <keyboard.h>
18
19#undef KBG_DEBUG
20
21#ifdef KBG_DEBUG
22#define PRINTF(fmt,args...) printf (fmt ,##args)
23#else
24#define PRINTF(fmt,args...)
25#endif
26
27
28#define DEVNAME "kbd"
29
30#define LED_SCR 0x01 /* scroll lock led */
31#define LED_CAP 0x04 /* caps lock led */
32#define LED_NUM 0x02 /* num lock led */
33
34#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
35
bd3143f0 36#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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37int ps2ser_check(void);
38#endif
39
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40static volatile char kbd_buffer[KBD_BUFFER_LEN];
41static volatile int in_pointer = 0;
42static volatile int out_pointer = 0;
43
44static unsigned char leds = 0;
45static unsigned char num_lock = 0;
46static unsigned char caps_lock = 0;
47static unsigned char scroll_lock = 0;
48static unsigned char shift = 0;
49static unsigned char ctrl = 0;
50static unsigned char alt = 0;
51static unsigned char e0 = 0;
52
53/******************************************************************
54 * Queue handling
55 ******************************************************************/
56
57/* puts character in the queue and sets up the in and out pointer */
58static void kbd_put_queue(char data)
59{
60 if((in_pointer+1)==KBD_BUFFER_LEN) {
61 if(out_pointer==0) {
62 return; /* buffer full */
63 } else{
64 in_pointer=0;
65 }
66 } else {
67 if((in_pointer+1)==out_pointer)
68 return; /* buffer full */
69 in_pointer++;
70 }
71 kbd_buffer[in_pointer]=data;
72 return;
73}
74
75/* test if a character is in the queue */
76static int kbd_testc(void)
77{
bd3143f0 78#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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79 /* no ISR is used, so received chars must be polled */
80 ps2ser_check();
81#endif
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82 if(in_pointer==out_pointer)
83 return(0); /* no data */
84 else
85 return(1);
86}
87
88/* gets the character from the queue */
89static int kbd_getc(void)
90{
91 char c;
7e6bf358 92 while(in_pointer==out_pointer) {
bd3143f0 93#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
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94 /* no ISR is used, so received chars must be polled */
95 ps2ser_check();
96#endif
97 ;}
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98 if((out_pointer+1)==KBD_BUFFER_LEN)
99 out_pointer=0;
100 else
101 out_pointer++;
102 c=kbd_buffer[out_pointer];
103 return (int)c;
104
105}
106
107/* Simple translation table for the keys */
108
109static unsigned char kbd_plain_xlate[] = {
110 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
111 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
112 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
113 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
114 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
115 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
116 '\r',0xff,0xff
117 };
118
119static unsigned char kbd_shift_xlate[] = {
120 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
121 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
122 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
123 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
124 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
125 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
126 '\r',0xff,0xff
127 };
128
129static unsigned char kbd_ctrl_xlate[] = {
130 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
131 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
132 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
133 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
134 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
135 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
136 '\r',0xff,0xff
137 };
138
139
140void handle_scancode(unsigned char scancode)
141{
142 unsigned char keycode;
143
144 /* Convert scancode to keycode */
145 PRINTF("scancode %x\n",scancode);
146 if(scancode==0xe0) {
147 e0=1; /* special charakters */
148 return;
149 }
150 if(e0==1) {
151 e0=0; /* delete flag */
152 if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */
153 ((scancode&0x7F)==0x1D)|| /* the right alt key */
154 ((scancode&0x7F)==0x35)|| /* the right '/' key */
155 ((scancode&0x7F)==0x1C) )) /* the right enter key */
156 /* we swallow unknown e0 codes */
157 return;
158 }
159 /* special cntrl keys */
160 switch(scancode) {
161 case 0x2A:
162 case 0x36: /* shift pressed */
163 shift=1;
164 return; /* do nothing else */
165 case 0xAA:
166 case 0xB6: /* shift released */
167 shift=0;
168 return; /* do nothing else */
169 case 0x38: /* alt pressed */
170 alt=1;
171 return; /* do nothing else */
172 case 0xB8: /* alt released */
173 alt=0;
174 return; /* do nothing else */
175 case 0x1d: /* ctrl pressed */
176 ctrl=1;
177 return; /* do nothing else */
178 case 0x9d: /* ctrl released */
179 ctrl=0;
180 return; /* do nothing else */
181 case 0x46: /* scrollock pressed */
182 scroll_lock=~scroll_lock;
183 if(scroll_lock==0)
184 leds&=~LED_SCR; /* switch LED off */
185 else
186 leds|=LED_SCR; /* switch on LED */
187 pckbd_leds(leds);
188 return; /* do nothing else */
189 case 0x3A: /* capslock pressed */
190 caps_lock=~caps_lock;
191 if(caps_lock==0)
192 leds&=~LED_CAP; /* switch caps_lock off */
193 else
194 leds|=LED_CAP; /* switch on LED */
195 pckbd_leds(leds);
196 return;
197 case 0x45: /* numlock pressed */
198 num_lock=~num_lock;
199 if(num_lock==0)
200 leds&=~LED_NUM; /* switch LED off */
201 else
202 leds|=LED_NUM; /* switch on LED */
203 pckbd_leds(leds);
204 return;
205 case 0xC6: /* scroll lock released */
206 case 0xC5: /* num lock released */
207 case 0xBA: /* caps lock released */
208 return; /* just swallow */
209 }
ef978730 210#if 1
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211 if((scancode&0x80)==0x80) /* key released */
212 return;
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213#else
214 if((scancode&0x80)==0x00) /* key pressed */
215 return;
216 scancode &= ~0x80;
217#endif
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218 /* now, decide which table we need */
219 if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
220 PRINTF("unkown scancode %X\n",scancode);
221 return; /* swallow it */
222 }
223 /* setup plain code first */
224 keycode=kbd_plain_xlate[scancode];
225 if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
226 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
227 PRINTF("unkown caps-locked scancode %X\n",scancode);
228 return; /* swallow it */
229 }
230 keycode=kbd_shift_xlate[scancode];
231 if(keycode<'A') { /* we only want the alphas capital */
232 keycode=kbd_plain_xlate[scancode];
233 }
234 }
235 if(shift==1) { /* shift overwrites caps_lock */
236 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
237 PRINTF("unkown shifted scancode %X\n",scancode);
238 return; /* swallow it */
239 }
240 keycode=kbd_shift_xlate[scancode];
241 }
242 if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
243 if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
244 PRINTF("unkown ctrl scancode %X\n",scancode);
245 return; /* swallow it */
246 }
247 keycode=kbd_ctrl_xlate[scancode];
248 }
249 /* check if valid keycode */
250 if(keycode==0xff) {
251 PRINTF("unkown scancode %X\n",scancode);
252 return; /* swallow unknown codes */
253 }
254
255 kbd_put_queue(keycode);
256 PRINTF("%x\n",keycode);
257}
258
259/******************************************************************
260 * Init
261 ******************************************************************/
262
263#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
264extern int overwrite_console (void);
83e40ba7 265#define OVERWRITE_CONSOLE overwrite_console ()
1c43771b 266#else
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267#define OVERWRITE_CONSOLE 0
268#endif /* CFG_CONSOLE_OVERWRITE_ROUTINE */
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269
270int kbd_init (void)
271{
272 int error;
273 device_t kbddev ;
274 char *stdinname = getenv ("stdin");
275
276 if(kbd_init_hw()==-1)
277 return -1;
278 memset (&kbddev, 0, sizeof(kbddev));
279 strcpy(kbddev.name, DEVNAME);
280 kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
281 kbddev.putc = NULL ;
282 kbddev.puts = NULL ;
283 kbddev.getc = kbd_getc ;
284 kbddev.tstc = kbd_testc ;
285
286 error = device_register (&kbddev);
287 if(error==0) {
288 /* check if this is the standard input device */
289 if(strcmp(stdinname,DEVNAME)==0) {
290 /* reassign the console */
83e40ba7 291 if(OVERWRITE_CONSOLE) {
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292 return 1;
293 }
294 error=console_assign(stdin,DEVNAME);
295 if(error==0)
296 return 1;
297 else
298 return error;
299 }
300 return 1;
301 }
302 return error;
303}
304
305#endif /* CONFIG_PS2KBD */