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wdenk1c437712004-01-16 00:30:56 +00001/***********************************************************************
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
wdenk1c437712004-01-16 00:30:56 +000014#include <devices.h>
15#include <keyboard.h>
16
17#undef KBG_DEBUG
18
19#ifdef KBG_DEBUG
20#define PRINTF(fmt,args...) printf (fmt ,##args)
21#else
22#define PRINTF(fmt,args...)
23#endif
24
25
26#define DEVNAME "kbd"
27
28#define LED_SCR 0x01 /* scroll lock led */
29#define LED_CAP 0x04 /* caps lock led */
30#define LED_NUM 0x02 /* num lock led */
31
32#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
33
Wolfgang Denkbd3143f2006-07-19 14:49:35 +020034#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
wdenk7e6bf352004-12-12 22:06:17 +000035int ps2ser_check(void);
36#endif
37
wdenk1c437712004-01-16 00:30:56 +000038static volatile char kbd_buffer[KBD_BUFFER_LEN];
39static volatile int in_pointer = 0;
40static volatile int out_pointer = 0;
41
42static unsigned char leds = 0;
43static unsigned char num_lock = 0;
44static unsigned char caps_lock = 0;
45static unsigned char scroll_lock = 0;
46static unsigned char shift = 0;
47static unsigned char ctrl = 0;
48static unsigned char alt = 0;
49static unsigned char e0 = 0;
50
51/******************************************************************
52 * Queue handling
53 ******************************************************************/
54
55/* puts character in the queue and sets up the in and out pointer */
56static void kbd_put_queue(char data)
57{
58 if((in_pointer+1)==KBD_BUFFER_LEN) {
59 if(out_pointer==0) {
60 return; /* buffer full */
61 } else{
62 in_pointer=0;
63 }
64 } else {
65 if((in_pointer+1)==out_pointer)
66 return; /* buffer full */
67 in_pointer++;
68 }
69 kbd_buffer[in_pointer]=data;
70 return;
71}
72
73/* test if a character is in the queue */
74static int kbd_testc(void)
75{
Wolfgang Denkbd3143f2006-07-19 14:49:35 +020076#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
wdenk7e6bf352004-12-12 22:06:17 +000077 /* no ISR is used, so received chars must be polled */
78 ps2ser_check();
79#endif
wdenk1c437712004-01-16 00:30:56 +000080 if(in_pointer==out_pointer)
81 return(0); /* no data */
82 else
83 return(1);
84}
85
86/* gets the character from the queue */
87static int kbd_getc(void)
88{
89 char c;
wdenk7e6bf352004-12-12 22:06:17 +000090 while(in_pointer==out_pointer) {
Wolfgang Denkbd3143f2006-07-19 14:49:35 +020091#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
wdenk7e6bf352004-12-12 22:06:17 +000092 /* no ISR is used, so received chars must be polled */
93 ps2ser_check();
94#endif
95 ;}
wdenk1c437712004-01-16 00:30:56 +000096 if((out_pointer+1)==KBD_BUFFER_LEN)
97 out_pointer=0;
98 else
99 out_pointer++;
100 c=kbd_buffer[out_pointer];
101 return (int)c;
102
103}
104
105/* Simple translation table for the keys */
106
107static unsigned char kbd_plain_xlate[] = {
108 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
109 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
110 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
111 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
112 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
113 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
114 '\r',0xff,0xff
115 };
116
117static unsigned char kbd_shift_xlate[] = {
118 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
119 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
120 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
121 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
122 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
123 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
124 '\r',0xff,0xff
125 };
126
127static unsigned char kbd_ctrl_xlate[] = {
128 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
129 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
130 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
131 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
132 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
133 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
134 '\r',0xff,0xff
135 };
136
137
138void handle_scancode(unsigned char scancode)
139{
140 unsigned char keycode;
141
142 /* Convert scancode to keycode */
143 PRINTF("scancode %x\n",scancode);
144 if(scancode==0xe0) {
145 e0=1; /* special charakters */
146 return;
147 }
148 if(e0==1) {
149 e0=0; /* delete flag */
150 if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */
151 ((scancode&0x7F)==0x1D)|| /* the right alt key */
152 ((scancode&0x7F)==0x35)|| /* the right '/' key */
153 ((scancode&0x7F)==0x1C) )) /* the right enter key */
154 /* we swallow unknown e0 codes */
155 return;
156 }
157 /* special cntrl keys */
158 switch(scancode) {
159 case 0x2A:
160 case 0x36: /* shift pressed */
161 shift=1;
162 return; /* do nothing else */
163 case 0xAA:
164 case 0xB6: /* shift released */
165 shift=0;
166 return; /* do nothing else */
167 case 0x38: /* alt pressed */
168 alt=1;
169 return; /* do nothing else */
170 case 0xB8: /* alt released */
171 alt=0;
172 return; /* do nothing else */
173 case 0x1d: /* ctrl pressed */
174 ctrl=1;
175 return; /* do nothing else */
176 case 0x9d: /* ctrl released */
177 ctrl=0;
178 return; /* do nothing else */
179 case 0x46: /* scrollock pressed */
180 scroll_lock=~scroll_lock;
181 if(scroll_lock==0)
182 leds&=~LED_SCR; /* switch LED off */
183 else
184 leds|=LED_SCR; /* switch on LED */
185 pckbd_leds(leds);
186 return; /* do nothing else */
187 case 0x3A: /* capslock pressed */
188 caps_lock=~caps_lock;
189 if(caps_lock==0)
190 leds&=~LED_CAP; /* switch caps_lock off */
191 else
192 leds|=LED_CAP; /* switch on LED */
193 pckbd_leds(leds);
194 return;
195 case 0x45: /* numlock pressed */
196 num_lock=~num_lock;
197 if(num_lock==0)
198 leds&=~LED_NUM; /* switch LED off */
199 else
200 leds|=LED_NUM; /* switch on LED */
201 pckbd_leds(leds);
202 return;
203 case 0xC6: /* scroll lock released */
204 case 0xC5: /* num lock released */
205 case 0xBA: /* caps lock released */
206 return; /* just swallow */
207 }
wdenkef978732004-01-21 20:46:28 +0000208#if 1
wdenk1c437712004-01-16 00:30:56 +0000209 if((scancode&0x80)==0x80) /* key released */
210 return;
wdenkc837dcb2004-01-20 23:12:12 +0000211#else
212 if((scancode&0x80)==0x00) /* key pressed */
213 return;
214 scancode &= ~0x80;
215#endif
wdenk1c437712004-01-16 00:30:56 +0000216 /* now, decide which table we need */
217 if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
218 PRINTF("unkown scancode %X\n",scancode);
219 return; /* swallow it */
220 }
221 /* setup plain code first */
222 keycode=kbd_plain_xlate[scancode];
223 if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
224 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
225 PRINTF("unkown caps-locked scancode %X\n",scancode);
226 return; /* swallow it */
227 }
228 keycode=kbd_shift_xlate[scancode];
229 if(keycode<'A') { /* we only want the alphas capital */
230 keycode=kbd_plain_xlate[scancode];
231 }
232 }
233 if(shift==1) { /* shift overwrites caps_lock */
234 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
235 PRINTF("unkown shifted scancode %X\n",scancode);
236 return; /* swallow it */
237 }
238 keycode=kbd_shift_xlate[scancode];
239 }
240 if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
241 if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
242 PRINTF("unkown ctrl scancode %X\n",scancode);
243 return; /* swallow it */
244 }
245 keycode=kbd_ctrl_xlate[scancode];
246 }
247 /* check if valid keycode */
248 if(keycode==0xff) {
249 PRINTF("unkown scancode %X\n",scancode);
250 return; /* swallow unknown codes */
251 }
252
253 kbd_put_queue(keycode);
254 PRINTF("%x\n",keycode);
255}
256
257/******************************************************************
258 * Init
259 ******************************************************************/
260
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200261#ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
wdenk1c437712004-01-16 00:30:56 +0000262extern int overwrite_console (void);
wdenk83e40ba2005-03-31 18:42:15 +0000263#define OVERWRITE_CONSOLE overwrite_console ()
wdenk1c437712004-01-16 00:30:56 +0000264#else
wdenk83e40ba2005-03-31 18:42:15 +0000265#define OVERWRITE_CONSOLE 0
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200266#endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
wdenk1c437712004-01-16 00:30:56 +0000267
268int kbd_init (void)
269{
270 int error;
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200271 device_t kbddev ;
wdenk1c437712004-01-16 00:30:56 +0000272 char *stdinname = getenv ("stdin");
273
274 if(kbd_init_hw()==-1)
275 return -1;
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200276 memset (&kbddev, 0, sizeof(kbddev));
277 strcpy(kbddev.name, DEVNAME);
278 kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
279 kbddev.putc = NULL ;
wdenk1c437712004-01-16 00:30:56 +0000280 kbddev.puts = NULL ;
281 kbddev.getc = kbd_getc ;
282 kbddev.tstc = kbd_testc ;
283
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200284 error = device_register (&kbddev);
wdenk1c437712004-01-16 00:30:56 +0000285 if(error==0) {
286 /* check if this is the standard input device */
287 if(strcmp(stdinname,DEVNAME)==0) {
288 /* reassign the console */
wdenk83e40ba2005-03-31 18:42:15 +0000289 if(OVERWRITE_CONSOLE) {
wdenk1c437712004-01-16 00:30:56 +0000290 return 1;
291 }
292 error=console_assign(stdin,DEVNAME);
293 if(error==0)
294 return 1;
295 else
296 return error;
297 }
298 return 1;
299 }
300 return error;
301}