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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch | |
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 | * Source partly derived from: | |
25 | * linux/drivers/char/pc_keyb.c | |
26 | * | |
27 | * | |
28 | */ | |
29 | #include <common.h> | |
30 | #include <asm/processor.h> | |
31 | #include <devices.h> | |
32 | #include "isa.h" | |
33 | #include "kbd.h" | |
34 | ||
35 | ||
36 | unsigned char kbd_read_status(void); | |
37 | unsigned char kbd_read_input(void); | |
38 | void kbd_send_data(unsigned char data); | |
39 | void disable_8259A_irq(unsigned int irq); | |
40 | void enable_8259A_irq(unsigned int irq); | |
41 | ||
42 | /* used only by send_data - set by keyboard_interrupt */ | |
43 | ||
44 | ||
45 | #undef KBG_DEBUG | |
46 | ||
47 | #ifdef KBG_DEBUG | |
48 | #define PRINTF(fmt,args...) printf (fmt ,##args) | |
49 | #else | |
50 | #define PRINTF(fmt,args...) | |
51 | #endif | |
52 | ||
53 | #define KBD_STAT_KOBF 0x01 | |
54 | #define KBD_STAT_IBF 0x02 | |
55 | #define KBD_STAT_SYS 0x04 | |
53677ef1 | 56 | #define KBD_STAT_CD 0x08 |
affae2bf WD |
57 | #define KBD_STAT_LOCK 0x10 |
58 | #define KBD_STAT_MOBF 0x20 | |
53677ef1 WD |
59 | #define KBD_STAT_TI_OUT 0x40 |
60 | #define KBD_STAT_PARERR 0x80 | |
affae2bf | 61 | |
53677ef1 WD |
62 | #define KBD_INIT_TIMEOUT 1000 /* Timeout in ms for initializing the keyboard */ |
63 | #define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */ | |
64 | #define KBD_TIMEOUT 2000 /* Timeout in ms for keyboard command acknowledge */ | |
affae2bf WD |
65 | /* |
66 | * Keyboard Controller Commands | |
67 | */ | |
68 | ||
53677ef1 WD |
69 | #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */ |
70 | #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */ | |
71 | #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */ | |
affae2bf | 72 | #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ |
53677ef1 WD |
73 | #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */ |
74 | #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */ | |
75 | #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */ | |
76 | #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */ | |
77 | #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */ | |
78 | #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */ | |
affae2bf WD |
79 | #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if |
80 | initiated by the auxiliary device */ | |
53677ef1 | 81 | #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ |
affae2bf WD |
82 | |
83 | /* | |
84 | * Keyboard Commands | |
85 | */ | |
86 | ||
53677ef1 WD |
87 | #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */ |
88 | #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */ | |
89 | #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */ | |
90 | #define KBD_CMD_DISABLE 0xF5 /* Disable scanning */ | |
91 | #define KBD_CMD_RESET 0xFF /* Reset */ | |
affae2bf WD |
92 | |
93 | /* | |
94 | * Keyboard Replies | |
95 | */ | |
96 | ||
53677ef1 WD |
97 | #define KBD_REPLY_POR 0xAA /* Power on reset */ |
98 | #define KBD_REPLY_ACK 0xFA /* Command ACK */ | |
99 | #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ | |
affae2bf WD |
100 | |
101 | /* | |
102 | * Status Register Bits | |
103 | */ | |
104 | ||
53677ef1 WD |
105 | #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ |
106 | #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ | |
107 | #define KBD_STAT_SELFTEST 0x04 /* Self test successful */ | |
108 | #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */ | |
109 | #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */ | |
110 | #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ | |
111 | #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */ | |
112 | #define KBD_STAT_PERR 0x80 /* Parity error */ | |
affae2bf WD |
113 | |
114 | #define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF) | |
115 | ||
116 | /* | |
117 | * Controller Mode Register Bits | |
118 | */ | |
119 | ||
53677ef1 WD |
120 | #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */ |
121 | #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */ | |
122 | #define KBD_MODE_SYS 0x04 /* The system flag (?) */ | |
123 | #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */ | |
124 | #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */ | |
affae2bf | 125 | #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ |
53677ef1 WD |
126 | #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ |
127 | #define KBD_MODE_RFU 0x80 | |
affae2bf WD |
128 | |
129 | ||
53677ef1 | 130 | #define KDB_DATA_PORT 0x60 |
affae2bf WD |
131 | #define KDB_COMMAND_PORT 0x64 |
132 | ||
53677ef1 WD |
133 | #define LED_SCR 0x01 /* scroll lock led */ |
134 | #define LED_CAP 0x04 /* caps lock led */ | |
135 | #define LED_NUM 0x02 /* num lock led */ | |
affae2bf | 136 | |
53677ef1 | 137 | #define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */ |
affae2bf WD |
138 | |
139 | ||
affae2bf WD |
140 | static volatile char kbd_buffer[KBD_BUFFER_LEN]; |
141 | static volatile int in_pointer = 0; | |
142 | static volatile int out_pointer = 0; | |
143 | ||
144 | ||
145 | static unsigned char num_lock = 0; | |
146 | static unsigned char caps_lock = 0; | |
147 | static unsigned char scroll_lock = 0; | |
148 | static unsigned char shift = 0; | |
149 | static unsigned char ctrl = 0; | |
150 | static unsigned char alt = 0; | |
151 | static unsigned char e0 = 0; | |
152 | static unsigned char leds = 0; | |
153 | ||
154 | #define DEVNAME "kbd" | |
155 | ||
156 | /* Simple translation table for the keys */ | |
157 | ||
158 | static unsigned char kbd_plain_xlate[] = { | |
159 | 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */ | |
160 | 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */ | |
161 | 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */ | |
162 | 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
163 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
164 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
165 | '\r',0xff,0xff | |
166 | }; | |
167 | ||
168 | static unsigned char kbd_shift_xlate[] = { | |
169 | 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */ | |
170 | 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */ | |
171 | 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */ | |
172 | 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
173 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
174 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
175 | '\r',0xff,0xff | |
176 | }; | |
177 | ||
178 | static unsigned char kbd_ctrl_xlate[] = { | |
179 | 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */ | |
180 | 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */ | |
181 | 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */ | |
182 | 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
183 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
184 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
185 | '\r',0xff,0xff | |
186 | }; | |
187 | ||
188 | /****************************************************************** | |
189 | * Init | |
190 | ******************************************************************/ | |
191 | int isa_kbd_init(void) | |
192 | { | |
193 | char* result; | |
194 | result=kbd_initialize(); | |
195 | if(result==NULL) { | |
196 | PRINTF("AT Keyboard initialized\n"); | |
197 | irq_install_handler(25, (interrupt_handler_t *)handle_isa_int, NULL); | |
198 | isa_irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL); | |
199 | return (1); | |
53677ef1 | 200 | } else { |
affae2bf WD |
201 | printf("%s\n",result); |
202 | return (-1); | |
203 | } | |
204 | } | |
205 | ||
6d0f6bcf | 206 | #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE |
affae2bf WD |
207 | extern int overwrite_console (void); |
208 | #else | |
209 | int overwrite_console (void) | |
210 | { | |
211 | return (0); | |
212 | } | |
213 | #endif | |
214 | ||
215 | int drv_isa_kbd_init (void) | |
216 | { | |
217 | int error; | |
53677ef1 | 218 | device_t kbddev ; |
affae2bf WD |
219 | char *stdinname = getenv ("stdin"); |
220 | ||
221 | if(isa_kbd_init()==-1) | |
222 | return -1; | |
53677ef1 WD |
223 | memset (&kbddev, 0, sizeof(kbddev)); |
224 | strcpy(kbddev.name, DEVNAME); | |
225 | kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; | |
226 | kbddev.putc = NULL ; | |
affae2bf WD |
227 | kbddev.puts = NULL ; |
228 | kbddev.getc = kbd_getc ; | |
229 | kbddev.tstc = kbd_testc ; | |
230 | ||
53677ef1 | 231 | error = device_register (&kbddev); |
affae2bf WD |
232 | if(error==0) { |
233 | /* check if this is the standard input device */ | |
234 | if(strcmp(stdinname,DEVNAME)==0) { | |
235 | /* reassign the console */ | |
236 | if(overwrite_console()) { | |
237 | return 1; | |
238 | } | |
239 | error=console_assign(stdin,DEVNAME); | |
240 | if(error==0) | |
241 | return 1; | |
242 | else | |
243 | return error; | |
244 | } | |
245 | return 1; | |
246 | } | |
247 | return error; | |
248 | } | |
249 | ||
250 | /****************************************************************** | |
251 | * Queue handling | |
252 | ******************************************************************/ | |
253 | /* puts character in the queue and sets up the in and out pointer */ | |
254 | void kbd_put_queue(char data) | |
255 | { | |
256 | if((in_pointer+1)==KBD_BUFFER_LEN) { | |
257 | if(out_pointer==0) { | |
258 | return; /* buffer full */ | |
259 | } else{ | |
260 | in_pointer=0; | |
261 | } | |
262 | } else { | |
263 | if((in_pointer+1)==out_pointer) | |
264 | return; /* buffer full */ | |
265 | in_pointer++; | |
266 | } | |
267 | kbd_buffer[in_pointer]=data; | |
268 | return; | |
269 | } | |
270 | ||
271 | /* test if a character is in the queue */ | |
272 | int kbd_testc(void) | |
273 | { | |
274 | if(in_pointer==out_pointer) | |
275 | return(0); /* no data */ | |
276 | else | |
277 | return(1); | |
278 | } | |
279 | /* gets the character from the queue */ | |
280 | int kbd_getc(void) | |
281 | { | |
282 | char c; | |
283 | while(in_pointer==out_pointer); | |
284 | if((out_pointer+1)==KBD_BUFFER_LEN) | |
285 | out_pointer=0; | |
286 | else | |
287 | out_pointer++; | |
288 | c=kbd_buffer[out_pointer]; | |
289 | return (int)c; | |
290 | ||
291 | } | |
292 | ||
293 | ||
294 | /* set LEDs */ | |
295 | ||
296 | void kbd_set_leds(void) | |
297 | { | |
298 | if(caps_lock==0) | |
299 | leds&=~LED_CAP; /* switch caps_lock off */ | |
300 | else | |
301 | leds|=LED_CAP; /* switch on LED */ | |
302 | if(num_lock==0) | |
303 | leds&=~LED_NUM; /* switch LED off */ | |
304 | else | |
305 | leds|=LED_NUM; /* switch on LED */ | |
306 | if(scroll_lock==0) | |
307 | leds&=~LED_SCR; /* switch LED off */ | |
308 | else | |
309 | leds|=LED_SCR; /* switch on LED */ | |
310 | kbd_send_data(KBD_CMD_SET_LEDS); | |
311 | kbd_send_data(leds); | |
312 | } | |
313 | ||
314 | ||
53677ef1 | 315 | void handle_keyboard_event (unsigned char scancode) |
affae2bf WD |
316 | { |
317 | unsigned char keycode; | |
318 | ||
319 | /* Convert scancode to keycode */ | |
53677ef1 WD |
320 | PRINTF ("scancode %x\n", scancode); |
321 | if (scancode == 0xe0) { | |
322 | e0 = 1; /* special charakters */ | |
affae2bf WD |
323 | return; |
324 | } | |
53677ef1 WD |
325 | if (e0 == 1) { |
326 | e0 = 0; /* delete flag */ | |
327 | if (!(((scancode & 0x7F) == 0x38) || /* the right ctrl key */ | |
328 | ((scancode & 0x7F) == 0x1D) || /* the right alt key */ | |
329 | ((scancode & 0x7F) == 0x35) || /* the right '/' key */ | |
330 | ((scancode & 0x7F) == 0x1C))) | |
331 | /* the right enter key */ | |
affae2bf WD |
332 | /* we swallow unknown e0 codes */ |
333 | return; | |
334 | } | |
335 | /* special cntrl keys */ | |
53677ef1 WD |
336 | switch (scancode) { |
337 | case 0x2A: | |
338 | case 0x36: /* shift pressed */ | |
339 | shift = 1; | |
340 | return; /* do nothing else */ | |
341 | case 0xAA: | |
342 | case 0xB6: /* shift released */ | |
343 | shift = 0; | |
344 | return; /* do nothing else */ | |
345 | case 0x38: /* alt pressed */ | |
346 | alt = 1; | |
347 | return; /* do nothing else */ | |
348 | case 0xB8: /* alt released */ | |
349 | alt = 0; | |
350 | return; /* do nothing else */ | |
351 | case 0x1d: /* ctrl pressed */ | |
352 | ctrl = 1; | |
353 | return; /* do nothing else */ | |
354 | case 0x9d: /* ctrl released */ | |
355 | ctrl = 0; | |
356 | return; /* do nothing else */ | |
357 | case 0x46: /* scrollock pressed */ | |
358 | scroll_lock = ~scroll_lock; | |
359 | kbd_set_leds (); | |
360 | return; /* do nothing else */ | |
361 | case 0x3A: /* capslock pressed */ | |
362 | caps_lock = ~caps_lock; | |
363 | kbd_set_leds (); | |
364 | return; | |
365 | case 0x45: /* numlock pressed */ | |
366 | num_lock = ~num_lock; | |
367 | kbd_set_leds (); | |
368 | return; | |
369 | case 0xC6: /* scroll lock released */ | |
370 | case 0xC5: /* num lock released */ | |
371 | case 0xBA: /* caps lock released */ | |
372 | return; /* just swallow */ | |
affae2bf | 373 | } |
53677ef1 | 374 | if ((scancode & 0x80) == 0x80) /* key released */ |
affae2bf WD |
375 | return; |
376 | /* now, decide which table we need */ | |
53677ef1 WD |
377 | if (scancode > (sizeof (kbd_plain_xlate) / sizeof (kbd_plain_xlate[0]))) { /* scancode not in list */ |
378 | PRINTF ("unkown scancode %X\n", scancode); | |
379 | return; /* swallow it */ | |
affae2bf WD |
380 | } |
381 | /* setup plain code first */ | |
53677ef1 WD |
382 | keycode = kbd_plain_xlate[scancode]; |
383 | if (caps_lock == 1) { /* caps_lock is pressed, overwrite plain code */ | |
384 | if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) { /* scancode not in list */ | |
385 | PRINTF ("unkown caps-locked scancode %X\n", scancode); | |
386 | return; /* swallow it */ | |
affae2bf | 387 | } |
53677ef1 WD |
388 | keycode = kbd_shift_xlate[scancode]; |
389 | if (keycode < 'A') { /* we only want the alphas capital */ | |
390 | keycode = kbd_plain_xlate[scancode]; | |
affae2bf WD |
391 | } |
392 | } | |
53677ef1 WD |
393 | if (shift == 1) { /* shift overwrites caps_lock */ |
394 | if (scancode > (sizeof (kbd_shift_xlate) / sizeof (kbd_shift_xlate[0]))) { /* scancode not in list */ | |
395 | PRINTF ("unkown shifted scancode %X\n", scancode); | |
396 | return; /* swallow it */ | |
affae2bf | 397 | } |
53677ef1 | 398 | keycode = kbd_shift_xlate[scancode]; |
affae2bf | 399 | } |
53677ef1 WD |
400 | if (ctrl == 1) { /* ctrl overwrites caps_lock and shift */ |
401 | if (scancode > (sizeof (kbd_ctrl_xlate) / sizeof (kbd_ctrl_xlate[0]))) { /* scancode not in list */ | |
402 | PRINTF ("unkown ctrl scancode %X\n", scancode); | |
403 | return; /* swallow it */ | |
affae2bf | 404 | } |
53677ef1 | 405 | keycode = kbd_ctrl_xlate[scancode]; |
affae2bf WD |
406 | } |
407 | /* check if valid keycode */ | |
53677ef1 WD |
408 | if (keycode == 0xff) { |
409 | PRINTF ("unkown scancode %X\n", scancode); | |
410 | return; /* swallow unknown codes */ | |
affae2bf WD |
411 | } |
412 | ||
53677ef1 WD |
413 | kbd_put_queue (keycode); |
414 | PRINTF ("%x\n", keycode); | |
affae2bf WD |
415 | } |
416 | ||
417 | /* | |
418 | * This reads the keyboard status port, and does the | |
419 | * appropriate action. | |
420 | * | |
421 | */ | |
422 | unsigned char handle_kbd_event(void) | |
423 | { | |
424 | unsigned char status = kbd_read_status(); | |
425 | unsigned int work = 10000; | |
426 | ||
427 | while ((--work > 0) && (status & KBD_STAT_OBF)) { | |
428 | unsigned char scancode; | |
429 | ||
430 | scancode = kbd_read_input(); | |
431 | ||
432 | /* Error bytes must be ignored to make the | |
433 | Synaptics touchpads compaq use work */ | |
434 | /* Ignore error bytes */ | |
435 | if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR))) | |
436 | { | |
437 | if (status & KBD_STAT_MOUSE_OBF) | |
438 | ; /* not supported: handle_mouse_event(scancode); */ | |
439 | else | |
440 | handle_keyboard_event(scancode); | |
441 | } | |
442 | status = kbd_read_status(); | |
443 | } | |
444 | if (!work) | |
445 | PRINTF("pc_keyb: controller jammed (0x%02X).\n", status); | |
446 | return status; | |
447 | } | |
448 | ||
449 | ||
affae2bf WD |
450 | /****************************************************************************** |
451 | * Lowlevel Part of keyboard section | |
452 | */ | |
453 | unsigned char kbd_read_status(void) | |
454 | { | |
6d0f6bcf | 455 | return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT)); |
affae2bf WD |
456 | } |
457 | ||
458 | unsigned char kbd_read_input(void) | |
459 | { | |
6d0f6bcf | 460 | return(in8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT)); |
affae2bf WD |
461 | } |
462 | ||
463 | void kbd_write_command(unsigned char cmd) | |
464 | { | |
6d0f6bcf | 465 | out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd); |
affae2bf WD |
466 | } |
467 | ||
468 | void kbd_write_output(unsigned char data) | |
469 | { | |
6d0f6bcf | 470 | out8(CONFIG_SYS_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data); |
affae2bf WD |
471 | } |
472 | ||
473 | int kbd_read_data(void) | |
474 | { | |
475 | int val; | |
476 | unsigned char status; | |
477 | ||
d0ff51ba | 478 | val = -1; |
affae2bf WD |
479 | status = kbd_read_status(); |
480 | if (status & KBD_STAT_OBF) { | |
481 | val = kbd_read_input(); | |
482 | if (status & (KBD_STAT_GTO | KBD_STAT_PERR)) | |
483 | val = -2; | |
484 | } | |
485 | return val; | |
486 | } | |
487 | ||
488 | int kbd_wait_for_input(void) | |
489 | { | |
490 | unsigned long timeout; | |
491 | int val; | |
492 | ||
493 | timeout = KBD_TIMEOUT; | |
494 | val=kbd_read_data(); | |
495 | while(val < 0) | |
496 | { | |
497 | if(timeout--==0) | |
498 | return -1; | |
499 | udelay(1000); | |
500 | val=kbd_read_data(); | |
501 | } | |
502 | return val; | |
503 | } | |
504 | ||
505 | ||
506 | int kb_wait(void) | |
507 | { | |
508 | unsigned long timeout = KBC_TIMEOUT * 10; | |
509 | ||
510 | do { | |
511 | unsigned char status = handle_kbd_event(); | |
512 | if (!(status & KBD_STAT_IBF)) | |
513 | return 0; /* ok */ | |
514 | udelay(1000); | |
515 | timeout--; | |
516 | } while (timeout); | |
517 | return 1; | |
518 | } | |
519 | ||
520 | void kbd_write_command_w(int data) | |
521 | { | |
522 | if(kb_wait()) | |
523 | PRINTF("timeout in kbd_write_command_w\n"); | |
524 | kbd_write_command(data); | |
525 | } | |
526 | ||
527 | void kbd_write_output_w(int data) | |
528 | { | |
529 | if(kb_wait()) | |
530 | PRINTF("timeout in kbd_write_output_w\n"); | |
531 | kbd_write_output(data); | |
532 | } | |
533 | ||
534 | void kbd_send_data(unsigned char data) | |
535 | { | |
536 | unsigned char status; | |
537 | disable_8259A_irq(1); /* disable interrupt */ | |
538 | kbd_write_output_w(data); | |
539 | status = kbd_wait_for_input(); | |
540 | if (status == KBD_REPLY_ACK) | |
541 | enable_8259A_irq(1); /* enable interrupt */ | |
542 | } | |
543 | ||
544 | ||
545 | char * kbd_initialize(void) | |
546 | { | |
547 | int status; | |
548 | ||
549 | in_pointer = 0; /* delete in Buffer */ | |
550 | out_pointer = 0; | |
551 | /* | |
552 | * Test the keyboard interface. | |
553 | * This seems to be the only way to get it going. | |
554 | * If the test is successful a x55 is placed in the input buffer. | |
555 | */ | |
556 | kbd_write_command_w(KBD_CCMD_SELF_TEST); | |
557 | if (kbd_wait_for_input() != 0x55) | |
558 | return "Kbd: failed self test"; | |
559 | /* | |
560 | * Perform a keyboard interface test. This causes the controller | |
561 | * to test the keyboard clock and data lines. The results of the | |
562 | * test are placed in the input buffer. | |
563 | */ | |
564 | kbd_write_command_w(KBD_CCMD_KBD_TEST); | |
565 | if (kbd_wait_for_input() != 0x00) | |
566 | return "Kbd: interface failed self test"; | |
567 | /* | |
568 | * Enable the keyboard by allowing the keyboard clock to run. | |
569 | */ | |
570 | kbd_write_command_w(KBD_CCMD_KBD_ENABLE); | |
571 | status = kbd_wait_for_input(); | |
572 | /* | |
573 | * Reset keyboard. If the read times out | |
574 | * then the assumption is that no keyboard is | |
575 | * plugged into the machine. | |
576 | * This defaults the keyboard to scan-code set 2. | |
577 | * | |
578 | * Set up to try again if the keyboard asks for RESEND. | |
579 | */ | |
580 | do { | |
581 | kbd_write_output_w(KBD_CMD_RESET); | |
582 | status = kbd_wait_for_input(); | |
583 | if (status == KBD_REPLY_ACK) | |
584 | break; | |
53677ef1 | 585 | if (status != KBD_REPLY_RESEND) { |
affae2bf WD |
586 | PRINTF("status: %X\n",status); |
587 | return "Kbd: reset failed, no ACK"; | |
588 | } | |
589 | } while (1); | |
590 | if (kbd_wait_for_input() != KBD_REPLY_POR) | |
591 | return "Kbd: reset failed, no POR"; | |
592 | ||
593 | /* | |
594 | * Set keyboard controller mode. During this, the keyboard should be | |
595 | * in the disabled state. | |
596 | * | |
597 | * Set up to try again if the keyboard asks for RESEND. | |
598 | */ | |
599 | do { | |
600 | kbd_write_output_w(KBD_CMD_DISABLE); | |
601 | status = kbd_wait_for_input(); | |
602 | if (status == KBD_REPLY_ACK) | |
603 | break; | |
604 | if (status != KBD_REPLY_RESEND) | |
605 | return "Kbd: disable keyboard: no ACK"; | |
606 | } while (1); | |
607 | ||
608 | kbd_write_command_w(KBD_CCMD_WRITE_MODE); | |
609 | kbd_write_output_w(KBD_MODE_KBD_INT | |
610 | | KBD_MODE_SYS | |
611 | | KBD_MODE_DISABLE_MOUSE | |
612 | | KBD_MODE_KCC); | |
613 | ||
0c8721a4 | 614 | /* AMCC powerpc portables need this to use scan-code set 1 -- Cort */ |
affae2bf WD |
615 | kbd_write_command_w(KBD_CCMD_READ_MODE); |
616 | if (!(kbd_wait_for_input() & KBD_MODE_KCC)) { | |
617 | /* | |
618 | * If the controller does not support conversion, | |
619 | * Set the keyboard to scan-code set 1. | |
620 | */ | |
621 | kbd_write_output_w(0xF0); | |
622 | kbd_wait_for_input(); | |
623 | kbd_write_output_w(0x01); | |
624 | kbd_wait_for_input(); | |
625 | } | |
626 | kbd_write_output_w(KBD_CMD_ENABLE); | |
627 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
628 | return "Kbd: enable keyboard: no ACK"; | |
629 | ||
630 | /* | |
631 | * Finally, set the typematic rate to maximum. | |
632 | */ | |
633 | kbd_write_output_w(KBD_CMD_SET_RATE); | |
634 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
635 | return "Kbd: Set rate: no ACK"; | |
636 | kbd_write_output_w(0x00); | |
637 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
638 | return "Kbd: Set rate: no ACK"; | |
639 | return NULL; | |
640 | } | |
641 | ||
642 | void kbd_interrupt(void) | |
643 | { | |
644 | handle_kbd_event(); | |
645 | } |