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c7de829c WD |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * John W. Linville, linville@tuxdriver.com | |
4 | * | |
5 | * Modified from code for support of MIP405 and PIP405 boards. Previous | |
6 | * copyright follows. | |
7 | * | |
8 | * (C) Copyright 2001 | |
9 | * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch | |
10 | * | |
11 | * See file CREDITS for list of people who contributed to this | |
12 | * project. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License as | |
16 | * published by the Free Software Foundation; either version 2 of | |
17 | * the License, or (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
27 | * MA 02111-1307 USA | |
28 | * | |
29 | * | |
30 | * Source partly derived from: | |
31 | * linux/drivers/char/pc_keyb.c | |
32 | * | |
33 | * | |
34 | */ | |
35 | #include <common.h> | |
36 | #include <asm/processor.h> | |
37 | #include <devices.h> | |
38 | #include "ps2kbd.h" | |
39 | ||
40 | ||
41 | unsigned char kbd_read_status(void); | |
42 | unsigned char kbd_read_input(void); | |
43 | void kbd_send_data(unsigned char data); | |
44 | void i8259_mask_irq(unsigned int irq); | |
45 | void i8259_unmask_irq(unsigned int irq); | |
46 | ||
47 | /* used only by send_data - set by keyboard_interrupt */ | |
48 | ||
49 | ||
50 | #undef KBG_DEBUG | |
51 | //#define KBG_DEBUG | |
52 | ||
53 | #ifdef KBG_DEBUG | |
54 | #define PRINTF(fmt,args...) printf (fmt ,##args) | |
55 | #else | |
56 | #define PRINTF(fmt,args...) | |
57 | #endif | |
58 | ||
59 | #define KBD_STAT_KOBF 0x01 | |
60 | #define KBD_STAT_IBF 0x02 | |
61 | #define KBD_STAT_SYS 0x04 | |
62 | #define KBD_STAT_CD 0x08 | |
63 | #define KBD_STAT_LOCK 0x10 | |
64 | #define KBD_STAT_MOBF 0x20 | |
65 | #define KBD_STAT_TI_OUT 0x40 | |
66 | #define KBD_STAT_PARERR 0x80 | |
67 | ||
68 | #define KBD_INIT_TIMEOUT 2000 /* Timeout in ms for initializing the keyboard */ | |
69 | #define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */ | |
70 | #define KBD_TIMEOUT 2000 /* Timeout in ms for keyboard command acknowledge */ | |
71 | /* | |
72 | * Keyboard Controller Commands | |
73 | */ | |
74 | ||
75 | #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */ | |
76 | #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */ | |
77 | #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */ | |
78 | #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ | |
79 | #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */ | |
80 | #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */ | |
81 | #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */ | |
82 | #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */ | |
83 | #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */ | |
84 | #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */ | |
85 | #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if | |
86 | initiated by the auxiliary device */ | |
87 | #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ | |
88 | ||
89 | /* | |
90 | * Keyboard Commands | |
91 | */ | |
92 | ||
93 | #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */ | |
94 | #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */ | |
95 | #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */ | |
96 | #define KBD_CMD_DISABLE 0xF5 /* Disable scanning */ | |
97 | #define KBD_CMD_RESET 0xFF /* Reset */ | |
98 | ||
99 | /* | |
100 | * Keyboard Replies | |
101 | */ | |
102 | ||
103 | #define KBD_REPLY_POR 0xAA /* Power on reset */ | |
104 | #define KBD_REPLY_ACK 0xFA /* Command ACK */ | |
105 | #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ | |
106 | ||
107 | /* | |
108 | * Status Register Bits | |
109 | */ | |
110 | ||
111 | #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ | |
112 | #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ | |
113 | #define KBD_STAT_SELFTEST 0x04 /* Self test successful */ | |
114 | #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */ | |
115 | #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */ | |
116 | #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ | |
117 | #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */ | |
118 | #define KBD_STAT_PERR 0x80 /* Parity error */ | |
119 | ||
120 | #define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF) | |
121 | ||
122 | /* | |
123 | * Controller Mode Register Bits | |
124 | */ | |
125 | ||
126 | #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */ | |
127 | #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */ | |
128 | #define KBD_MODE_SYS 0x04 /* The system flag (?) */ | |
129 | #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */ | |
130 | #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */ | |
131 | #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ | |
132 | #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ | |
133 | #define KBD_MODE_RFU 0x80 | |
134 | ||
135 | ||
136 | #define KDB_DATA_PORT 0x60 | |
137 | #define KDB_COMMAND_PORT 0x64 | |
138 | ||
139 | #define LED_SCR 0x01 /* scroll lock led */ | |
140 | #define LED_CAP 0x04 /* caps lock led */ | |
141 | #define LED_NUM 0x02 /* num lock led */ | |
142 | ||
143 | #define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */ | |
144 | ||
145 | ||
146 | ||
147 | ||
148 | static volatile char kbd_buffer[KBD_BUFFER_LEN]; | |
149 | static volatile int in_pointer = 0; | |
150 | static volatile int out_pointer = 0; | |
151 | ||
152 | ||
153 | static unsigned char num_lock = 0; | |
154 | static unsigned char caps_lock = 0; | |
155 | static unsigned char scroll_lock = 0; | |
156 | static unsigned char shift = 0; | |
157 | static unsigned char ctrl = 0; | |
158 | static unsigned char alt = 0; | |
159 | static unsigned char e0 = 0; | |
160 | static unsigned char leds = 0; | |
161 | ||
162 | #define DEVNAME "ps2kbd" | |
163 | ||
164 | /* Simple translation table for the keys */ | |
165 | ||
166 | static unsigned char kbd_plain_xlate[] = { | |
167 | 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */ | |
168 | 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */ | |
169 | 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */ | |
170 | 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
171 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
172 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
173 | '\r',0xff,0xff | |
174 | }; | |
175 | ||
176 | static unsigned char kbd_shift_xlate[] = { | |
177 | 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */ | |
178 | 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */ | |
179 | 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */ | |
180 | 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
181 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
182 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
183 | '\r',0xff,0xff | |
184 | }; | |
185 | ||
186 | static unsigned char kbd_ctrl_xlate[] = { | |
187 | 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */ | |
188 | 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */ | |
189 | 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */ | |
190 | 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
191 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
192 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
193 | '\r',0xff,0xff | |
194 | }; | |
195 | ||
196 | /****************************************************************** | |
197 | * Init | |
198 | ******************************************************************/ | |
199 | ||
200 | int isa_kbd_init(void) | |
201 | { | |
202 | char* result; | |
203 | result=kbd_initialize(); | |
204 | if (result != NULL) | |
205 | { | |
206 | result = kbd_initialize(); | |
207 | } | |
208 | if(result==NULL) { | |
209 | printf("AT Keyboard initialized\n"); | |
210 | irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL); | |
211 | return (1); | |
212 | } | |
213 | else { | |
214 | printf("%s\n",result); | |
215 | return (-1); | |
216 | } | |
217 | } | |
218 | ||
219 | #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE | |
220 | extern int overwrite_console (void); | |
221 | #else | |
222 | int overwrite_console (void) | |
223 | { | |
224 | return (0); | |
225 | } | |
226 | #endif | |
227 | ||
228 | int drv_isa_kbd_init (void) | |
229 | { | |
230 | int error; | |
231 | device_t kbddev ; | |
232 | char *stdinname = getenv ("stdin"); | |
233 | ||
234 | if(isa_kbd_init()==-1) | |
235 | return -1; | |
236 | memset (&kbddev, 0, sizeof(kbddev)); | |
237 | strcpy(kbddev.name, DEVNAME); | |
238 | kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; | |
239 | kbddev.putc = NULL ; | |
240 | kbddev.puts = NULL ; | |
241 | kbddev.getc = kbd_getc ; | |
242 | kbddev.tstc = kbd_testc ; | |
243 | ||
244 | error = device_register (&kbddev); | |
245 | if(error==0) { | |
246 | /* check if this is the standard input device */ | |
247 | if(strcmp(stdinname,DEVNAME)==0) { | |
248 | /* reassign the console */ | |
249 | if(overwrite_console()) { | |
250 | return 1; | |
251 | } | |
252 | error=console_assign(stdin,DEVNAME); | |
253 | if(error==0) | |
254 | return 1; | |
255 | else | |
256 | return error; | |
257 | } | |
258 | return 1; | |
259 | } | |
260 | return error; | |
261 | } | |
262 | ||
263 | /****************************************************************** | |
264 | * Queue handling | |
265 | ******************************************************************/ | |
266 | /* puts character in the queue and sets up the in and out pointer */ | |
267 | void kbd_put_queue(char data) | |
268 | { | |
269 | if((in_pointer+1)==KBD_BUFFER_LEN) { | |
270 | if(out_pointer==0) { | |
271 | return; /* buffer full */ | |
272 | } else{ | |
273 | in_pointer=0; | |
274 | } | |
275 | } else { | |
276 | if((in_pointer+1)==out_pointer) | |
277 | return; /* buffer full */ | |
278 | in_pointer++; | |
279 | } | |
280 | kbd_buffer[in_pointer]=data; | |
281 | return; | |
282 | } | |
283 | ||
284 | /* test if a character is in the queue */ | |
285 | int kbd_testc(void) | |
286 | { | |
287 | if(in_pointer==out_pointer) | |
288 | return(0); /* no data */ | |
289 | else | |
290 | return(1); | |
291 | } | |
292 | /* gets the character from the queue */ | |
293 | int kbd_getc(void) | |
294 | { | |
295 | char c; | |
296 | ||
297 | while(in_pointer==out_pointer); | |
298 | if((out_pointer+1)==KBD_BUFFER_LEN) | |
299 | out_pointer=0; | |
300 | else | |
301 | out_pointer++; | |
302 | c=kbd_buffer[out_pointer]; | |
303 | return (int)c; | |
304 | ||
305 | } | |
306 | ||
307 | ||
308 | /* set LEDs */ | |
309 | ||
310 | void kbd_set_leds(void) | |
311 | { | |
312 | if(caps_lock==0) | |
313 | leds&=~LED_CAP; /* switch caps_lock off */ | |
314 | else | |
315 | leds|=LED_CAP; /* switch on LED */ | |
316 | if(num_lock==0) | |
317 | leds&=~LED_NUM; /* switch LED off */ | |
318 | else | |
319 | leds|=LED_NUM; /* switch on LED */ | |
320 | if(scroll_lock==0) | |
321 | leds&=~LED_SCR; /* switch LED off */ | |
322 | else | |
323 | leds|=LED_SCR; /* switch on LED */ | |
324 | kbd_send_data(KBD_CMD_SET_LEDS); | |
325 | kbd_send_data(leds); | |
326 | } | |
327 | ||
328 | ||
329 | void handle_keyboard_event(unsigned char scancode) | |
330 | { | |
331 | unsigned char keycode; | |
332 | ||
333 | /* Convert scancode to keycode */ | |
334 | PRINTF("scancode %x\n",scancode); | |
335 | if(scancode==0xe0) { | |
336 | e0=1; /* special charakters */ | |
337 | return; | |
338 | } | |
339 | if(e0==1) { | |
340 | e0=0; /* delete flag */ | |
341 | if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */ | |
342 | ((scancode&0x7F)==0x1D)|| /* the right alt key */ | |
343 | ((scancode&0x7F)==0x35)|| /* the right '/' key */ | |
344 | ((scancode&0x7F)==0x1C)|| /* the right enter key */ | |
345 | ((scancode)==0x48)|| /* arrow up */ | |
346 | ((scancode)==0x50)|| /* arrow down */ | |
347 | ((scancode)==0x4b)|| /* arrow left */ | |
348 | ((scancode)==0x4d))) /* arrow right */ | |
349 | /* we swallow unknown e0 codes */ | |
350 | return; | |
351 | } | |
352 | /* special cntrl keys */ | |
353 | switch(scancode) | |
354 | { | |
355 | case 0x48: | |
356 | kbd_put_queue(27); | |
357 | kbd_put_queue(91); | |
358 | kbd_put_queue('A'); | |
359 | return; | |
360 | case 0x50: | |
361 | kbd_put_queue(27); | |
362 | kbd_put_queue(91); | |
363 | kbd_put_queue('B'); | |
364 | return; | |
365 | case 0x4b: | |
366 | kbd_put_queue(27); | |
367 | kbd_put_queue(91); | |
368 | kbd_put_queue('D'); | |
369 | return; | |
370 | case 0x4D: | |
371 | kbd_put_queue(27); | |
372 | kbd_put_queue(91); | |
373 | kbd_put_queue('C'); | |
374 | return; | |
375 | case 0x58: /* F12 key */ | |
376 | if (ctrl == 1) | |
377 | { | |
378 | extern int console_changed; | |
379 | setenv("stdin", DEVNAME); | |
380 | setenv("stdout", "vga"); | |
381 | console_changed = 1; | |
382 | } | |
383 | return; | |
384 | case 0x2A: | |
385 | case 0x36: /* shift pressed */ | |
386 | shift=1; | |
387 | return; /* do nothing else */ | |
388 | case 0xAA: | |
389 | case 0xB6: /* shift released */ | |
390 | shift=0; | |
391 | return; /* do nothing else */ | |
392 | case 0x38: /* alt pressed */ | |
393 | alt=1; | |
394 | return; /* do nothing else */ | |
395 | case 0xB8: /* alt released */ | |
396 | alt=0; | |
397 | return; /* do nothing else */ | |
398 | case 0x1d: /* ctrl pressed */ | |
399 | ctrl=1; | |
400 | return; /* do nothing else */ | |
401 | case 0x9d: /* ctrl released */ | |
402 | ctrl=0; | |
403 | return; /* do nothing else */ | |
404 | case 0x46: /* scrollock pressed */ | |
405 | scroll_lock=~scroll_lock; | |
406 | kbd_set_leds(); | |
407 | return; /* do nothing else */ | |
408 | case 0x3A: /* capslock pressed */ | |
409 | caps_lock=~caps_lock; | |
410 | kbd_set_leds(); | |
411 | return; | |
412 | case 0x45: /* numlock pressed */ | |
413 | num_lock=~num_lock; | |
414 | kbd_set_leds(); | |
415 | return; | |
416 | case 0xC6: /* scroll lock released */ | |
417 | case 0xC5: /* num lock released */ | |
418 | case 0xBA: /* caps lock released */ | |
419 | return; /* just swallow */ | |
420 | } | |
421 | if((scancode&0x80)==0x80) /* key released */ | |
422 | return; | |
423 | /* now, decide which table we need */ | |
424 | if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */ | |
425 | PRINTF("unkown scancode %X\n",scancode); | |
426 | return; /* swallow it */ | |
427 | } | |
428 | /* setup plain code first */ | |
429 | keycode=kbd_plain_xlate[scancode]; | |
430 | if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */ | |
431 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
432 | PRINTF("unkown caps-locked scancode %X\n",scancode); | |
433 | return; /* swallow it */ | |
434 | } | |
435 | keycode=kbd_shift_xlate[scancode]; | |
436 | if(keycode<'A') { /* we only want the alphas capital */ | |
437 | keycode=kbd_plain_xlate[scancode]; | |
438 | } | |
439 | } | |
440 | if(shift==1) { /* shift overwrites caps_lock */ | |
441 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
442 | PRINTF("unkown shifted scancode %X\n",scancode); | |
443 | return; /* swallow it */ | |
444 | } | |
445 | keycode=kbd_shift_xlate[scancode]; | |
446 | } | |
447 | if(ctrl==1) { /* ctrl overwrites caps_lock and shift */ | |
448 | if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */ | |
449 | PRINTF("unkown ctrl scancode %X\n",scancode); | |
450 | return; /* swallow it */ | |
451 | } | |
452 | keycode=kbd_ctrl_xlate[scancode]; | |
453 | } | |
454 | /* check if valid keycode */ | |
455 | if(keycode==0xff) { | |
456 | PRINTF("unkown scancode %X\n",scancode); | |
457 | return; /* swallow unknown codes */ | |
458 | } | |
459 | ||
460 | kbd_put_queue(keycode); | |
461 | PRINTF("%x\n",keycode); | |
462 | } | |
463 | ||
464 | /* | |
465 | * This reads the keyboard status port, and does the | |
466 | * appropriate action. | |
467 | * | |
468 | */ | |
469 | unsigned char handle_kbd_event(void) | |
470 | { | |
471 | unsigned char status = kbd_read_status(); | |
472 | unsigned int work = 10000; | |
473 | ||
474 | while ((--work > 0) && (status & KBD_STAT_OBF)) { | |
475 | unsigned char scancode; | |
476 | ||
477 | scancode = kbd_read_input(); | |
478 | ||
479 | /* Error bytes must be ignored to make the | |
480 | Synaptics touchpads compaq use work */ | |
481 | /* Ignore error bytes */ | |
482 | if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR))) | |
483 | { | |
484 | if (status & KBD_STAT_MOUSE_OBF) | |
485 | ; /* not supported: handle_mouse_event(scancode); */ | |
486 | else | |
487 | handle_keyboard_event(scancode); | |
488 | } | |
489 | status = kbd_read_status(); | |
490 | } | |
491 | if (!work) | |
492 | PRINTF("pc_keyb: controller jammed (0x%02X).\n", status); | |
493 | return status; | |
494 | } | |
495 | ||
496 | ||
497 | ||
498 | /****************************************************************************** | |
499 | * Lowlevel Part of keyboard section | |
500 | */ | |
501 | unsigned char kbd_read_status(void) | |
502 | { | |
503 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT)); | |
504 | } | |
505 | ||
506 | unsigned char kbd_read_input(void) | |
507 | { | |
508 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT)); | |
509 | } | |
510 | ||
511 | void kbd_write_command(unsigned char cmd) | |
512 | { | |
513 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd); | |
514 | } | |
515 | ||
516 | void kbd_write_output(unsigned char data) | |
517 | { | |
518 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data); | |
519 | } | |
520 | ||
521 | int kbd_read_data(void) | |
522 | { | |
523 | int val; | |
524 | unsigned char status; | |
525 | ||
526 | val=-1; | |
527 | status = kbd_read_status(); | |
528 | if (status & KBD_STAT_OBF) { | |
529 | val = kbd_read_input(); | |
530 | if (status & (KBD_STAT_GTO | KBD_STAT_PERR)) | |
531 | val = -2; | |
532 | } | |
533 | return val; | |
534 | } | |
535 | ||
536 | int kbd_wait_for_input(void) | |
537 | { | |
538 | unsigned long timeout; | |
539 | int val; | |
540 | ||
541 | timeout = KBD_TIMEOUT; | |
542 | val=kbd_read_data(); | |
543 | while(val < 0) | |
544 | { | |
545 | if(timeout--==0) | |
546 | return -1; | |
547 | udelay(1000); | |
548 | val=kbd_read_data(); | |
549 | } | |
550 | return val; | |
551 | } | |
552 | ||
553 | ||
554 | int kb_wait(void) | |
555 | { | |
556 | unsigned long timeout = KBC_TIMEOUT * 10; | |
557 | ||
558 | do { | |
559 | unsigned char status = handle_kbd_event(); | |
560 | if (!(status & KBD_STAT_IBF)) | |
561 | return 0; /* ok */ | |
562 | udelay(1000); | |
563 | timeout--; | |
564 | } while (timeout); | |
565 | return 1; | |
566 | } | |
567 | ||
568 | void kbd_write_command_w(int data) | |
569 | { | |
570 | if(kb_wait()) | |
571 | PRINTF("timeout in kbd_write_command_w\n"); | |
572 | kbd_write_command(data); | |
573 | } | |
574 | ||
575 | void kbd_write_output_w(int data) | |
576 | { | |
577 | if(kb_wait()) | |
578 | PRINTF("timeout in kbd_write_output_w\n"); | |
579 | kbd_write_output(data); | |
580 | } | |
581 | ||
582 | void kbd_send_data(unsigned char data) | |
583 | { | |
584 | unsigned char status; | |
585 | i8259_mask_irq(KBD_INTERRUPT); /* disable interrupt */ | |
586 | kbd_write_output_w(data); | |
587 | status = kbd_wait_for_input(); | |
588 | if (status == KBD_REPLY_ACK) | |
589 | i8259_unmask_irq(KBD_INTERRUPT); /* enable interrupt */ | |
590 | } | |
591 | ||
592 | ||
593 | char * kbd_initialize(void) | |
594 | { | |
595 | int status; | |
596 | ||
597 | in_pointer = 0; /* delete in Buffer */ | |
598 | out_pointer = 0; | |
599 | /* | |
600 | * Test the keyboard interface. | |
601 | * This seems to be the only way to get it going. | |
602 | * If the test is successful a x55 is placed in the input buffer. | |
603 | */ | |
604 | kbd_write_command_w(KBD_CCMD_SELF_TEST); | |
605 | if (kbd_wait_for_input() != 0x55) | |
606 | return "Kbd: failed self test"; | |
607 | /* | |
608 | * Perform a keyboard interface test. This causes the controller | |
609 | * to test the keyboard clock and data lines. The results of the | |
610 | * test are placed in the input buffer. | |
611 | */ | |
612 | kbd_write_command_w(KBD_CCMD_KBD_TEST); | |
613 | if (kbd_wait_for_input() != 0x00) | |
614 | return "Kbd: interface failed self test"; | |
615 | /* | |
616 | * Enable the keyboard by allowing the keyboard clock to run. | |
617 | */ | |
618 | kbd_write_command_w(KBD_CCMD_KBD_ENABLE); | |
619 | status = kbd_wait_for_input(); | |
620 | /* | |
621 | * Reset keyboard. If the read times out | |
622 | * then the assumption is that no keyboard is | |
623 | * plugged into the machine. | |
624 | * This defaults the keyboard to scan-code set 2. | |
625 | * | |
626 | * Set up to try again if the keyboard asks for RESEND. | |
627 | */ | |
628 | do { | |
629 | kbd_write_output_w(KBD_CMD_RESET); | |
630 | status = kbd_wait_for_input(); | |
631 | if (status == KBD_REPLY_ACK) | |
632 | break; | |
633 | if (status != KBD_REPLY_RESEND) | |
634 | { | |
635 | PRINTF("status: %X\n",status); | |
636 | return "Kbd: reset failed, no ACK"; | |
637 | } | |
638 | } while (1); | |
639 | if (kbd_wait_for_input() != KBD_REPLY_POR) | |
640 | return "Kbd: reset failed, no POR"; | |
641 | ||
642 | /* | |
643 | * Set keyboard controller mode. During this, the keyboard should be | |
644 | * in the disabled state. | |
645 | * | |
646 | * Set up to try again if the keyboard asks for RESEND. | |
647 | */ | |
648 | do { | |
649 | kbd_write_output_w(KBD_CMD_DISABLE); | |
650 | status = kbd_wait_for_input(); | |
651 | if (status == KBD_REPLY_ACK) | |
652 | break; | |
653 | if (status != KBD_REPLY_RESEND) | |
654 | return "Kbd: disable keyboard: no ACK"; | |
655 | } while (1); | |
656 | ||
657 | kbd_write_command_w(KBD_CCMD_WRITE_MODE); | |
658 | kbd_write_output_w(KBD_MODE_KBD_INT | |
659 | | KBD_MODE_SYS | |
660 | | KBD_MODE_DISABLE_MOUSE | |
661 | | KBD_MODE_KCC); | |
662 | ||
663 | /* ibm powerpc portables need this to use scan-code set 1 -- Cort */ | |
664 | kbd_write_command_w(KBD_CCMD_READ_MODE); | |
665 | if (!(kbd_wait_for_input() & KBD_MODE_KCC)) { | |
666 | /* | |
667 | * If the controller does not support conversion, | |
668 | * Set the keyboard to scan-code set 1. | |
669 | */ | |
670 | kbd_write_output_w(0xF0); | |
671 | kbd_wait_for_input(); | |
672 | kbd_write_output_w(0x01); | |
673 | kbd_wait_for_input(); | |
674 | } | |
675 | kbd_write_output_w(KBD_CMD_ENABLE); | |
676 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
677 | return "Kbd: enable keyboard: no ACK"; | |
678 | ||
679 | /* | |
680 | * Finally, set the typematic rate to maximum. | |
681 | */ | |
682 | kbd_write_output_w(KBD_CMD_SET_RATE); | |
683 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
684 | return "Kbd: Set rate: no ACK"; | |
685 | kbd_write_output_w(0x00); | |
686 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
687 | return "Kbd: Set rate: no ACK"; | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | void kbd_interrupt(void) | |
692 | { | |
693 | handle_kbd_event(); | |
694 | } | |
695 | ||
696 | ||
697 | ||
698 | /* eof */ | |
699 |