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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 | |
56 | #define KBD_STAT_CD 0x08 | |
57 | #define KBD_STAT_LOCK 0x10 | |
58 | #define KBD_STAT_MOBF 0x20 | |
59 | #define KBD_STAT_TI_OUT 0x40 | |
60 | #define KBD_STAT_PARERR 0x80 | |
61 | ||
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 */ | |
65 | /* | |
66 | * Keyboard Controller Commands | |
67 | */ | |
68 | ||
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 */ | |
72 | #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ | |
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 */ | |
79 | #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if | |
80 | initiated by the auxiliary device */ | |
81 | #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ | |
82 | ||
83 | /* | |
84 | * Keyboard Commands | |
85 | */ | |
86 | ||
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 */ | |
92 | ||
93 | /* | |
94 | * Keyboard Replies | |
95 | */ | |
96 | ||
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 */ | |
100 | ||
101 | /* | |
102 | * Status Register Bits | |
103 | */ | |
104 | ||
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 */ | |
113 | ||
114 | #define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF) | |
115 | ||
116 | /* | |
117 | * Controller Mode Register Bits | |
118 | */ | |
119 | ||
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 */ | |
125 | #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ | |
126 | #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ | |
127 | #define KBD_MODE_RFU 0x80 | |
128 | ||
129 | ||
130 | #define KDB_DATA_PORT 0x60 | |
131 | #define KDB_COMMAND_PORT 0x64 | |
132 | ||
133 | #define LED_SCR 0x01 /* scroll lock led */ | |
134 | #define LED_CAP 0x04 /* caps lock led */ | |
135 | #define LED_NUM 0x02 /* num lock led */ | |
136 | ||
137 | #define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */ | |
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); | |
200 | } | |
201 | else { | |
202 | printf("%s\n",result); | |
203 | return (-1); | |
204 | } | |
205 | } | |
206 | ||
207 | #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE | |
208 | extern int overwrite_console (void); | |
209 | #else | |
210 | int overwrite_console (void) | |
211 | { | |
212 | return (0); | |
213 | } | |
214 | #endif | |
215 | ||
216 | int drv_isa_kbd_init (void) | |
217 | { | |
218 | int error; | |
219 | device_t kbddev ; | |
220 | char *stdinname = getenv ("stdin"); | |
221 | ||
222 | if(isa_kbd_init()==-1) | |
223 | return -1; | |
224 | memset (&kbddev, 0, sizeof(kbddev)); | |
225 | strcpy(kbddev.name, DEVNAME); | |
226 | kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; | |
227 | kbddev.putc = NULL ; | |
228 | kbddev.puts = NULL ; | |
229 | kbddev.getc = kbd_getc ; | |
230 | kbddev.tstc = kbd_testc ; | |
231 | ||
232 | error = device_register (&kbddev); | |
233 | if(error==0) { | |
234 | /* check if this is the standard input device */ | |
235 | if(strcmp(stdinname,DEVNAME)==0) { | |
236 | /* reassign the console */ | |
237 | if(overwrite_console()) { | |
238 | return 1; | |
239 | } | |
240 | error=console_assign(stdin,DEVNAME); | |
241 | if(error==0) | |
242 | return 1; | |
243 | else | |
244 | return error; | |
245 | } | |
246 | return 1; | |
247 | } | |
248 | return error; | |
249 | } | |
250 | ||
251 | /****************************************************************** | |
252 | * Queue handling | |
253 | ******************************************************************/ | |
254 | /* puts character in the queue and sets up the in and out pointer */ | |
255 | void kbd_put_queue(char data) | |
256 | { | |
257 | if((in_pointer+1)==KBD_BUFFER_LEN) { | |
258 | if(out_pointer==0) { | |
259 | return; /* buffer full */ | |
260 | } else{ | |
261 | in_pointer=0; | |
262 | } | |
263 | } else { | |
264 | if((in_pointer+1)==out_pointer) | |
265 | return; /* buffer full */ | |
266 | in_pointer++; | |
267 | } | |
268 | kbd_buffer[in_pointer]=data; | |
269 | return; | |
270 | } | |
271 | ||
272 | /* test if a character is in the queue */ | |
273 | int kbd_testc(void) | |
274 | { | |
275 | if(in_pointer==out_pointer) | |
276 | return(0); /* no data */ | |
277 | else | |
278 | return(1); | |
279 | } | |
280 | /* gets the character from the queue */ | |
281 | int kbd_getc(void) | |
282 | { | |
283 | char c; | |
284 | while(in_pointer==out_pointer); | |
285 | if((out_pointer+1)==KBD_BUFFER_LEN) | |
286 | out_pointer=0; | |
287 | else | |
288 | out_pointer++; | |
289 | c=kbd_buffer[out_pointer]; | |
290 | return (int)c; | |
291 | ||
292 | } | |
293 | ||
294 | ||
295 | /* set LEDs */ | |
296 | ||
297 | void kbd_set_leds(void) | |
298 | { | |
299 | if(caps_lock==0) | |
300 | leds&=~LED_CAP; /* switch caps_lock off */ | |
301 | else | |
302 | leds|=LED_CAP; /* switch on LED */ | |
303 | if(num_lock==0) | |
304 | leds&=~LED_NUM; /* switch LED off */ | |
305 | else | |
306 | leds|=LED_NUM; /* switch on LED */ | |
307 | if(scroll_lock==0) | |
308 | leds&=~LED_SCR; /* switch LED off */ | |
309 | else | |
310 | leds|=LED_SCR; /* switch on LED */ | |
311 | kbd_send_data(KBD_CMD_SET_LEDS); | |
312 | kbd_send_data(leds); | |
313 | } | |
314 | ||
315 | ||
316 | void handle_keyboard_event(unsigned char scancode) | |
317 | { | |
318 | unsigned char keycode; | |
319 | ||
320 | /* Convert scancode to keycode */ | |
321 | PRINTF("scancode %x\n",scancode); | |
322 | if(scancode==0xe0) { | |
323 | e0=1; /* special charakters */ | |
324 | return; | |
325 | } | |
326 | if(e0==1) { | |
327 | e0=0; /* delete flag */ | |
328 | if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */ | |
329 | ((scancode&0x7F)==0x1D)|| /* the right alt key */ | |
330 | ((scancode&0x7F)==0x35)|| /* the right '/' key */ | |
331 | ((scancode&0x7F)==0x1C) )) /* the right enter key */ | |
332 | /* we swallow unknown e0 codes */ | |
333 | return; | |
334 | } | |
335 | /* special cntrl keys */ | |
336 | switch(scancode) | |
337 | { | |
338 | case 0x2A: | |
339 | case 0x36: /* shift pressed */ | |
340 | shift=1; | |
341 | return; /* do nothing else */ | |
342 | case 0xAA: | |
343 | case 0xB6: /* shift released */ | |
344 | shift=0; | |
345 | return; /* do nothing else */ | |
346 | case 0x38: /* alt pressed */ | |
347 | alt=1; | |
348 | return; /* do nothing else */ | |
349 | case 0xB8: /* alt released */ | |
350 | alt=0; | |
351 | return; /* do nothing else */ | |
352 | case 0x1d: /* ctrl pressed */ | |
353 | ctrl=1; | |
354 | return; /* do nothing else */ | |
355 | case 0x9d: /* ctrl released */ | |
356 | ctrl=0; | |
357 | return; /* do nothing else */ | |
358 | case 0x46: /* scrollock pressed */ | |
359 | scroll_lock=~scroll_lock; | |
360 | kbd_set_leds(); | |
361 | return; /* do nothing else */ | |
362 | case 0x3A: /* capslock pressed */ | |
363 | caps_lock=~caps_lock; | |
364 | kbd_set_leds(); | |
365 | return; | |
366 | case 0x45: /* numlock pressed */ | |
367 | num_lock=~num_lock; | |
368 | kbd_set_leds(); | |
369 | return; | |
370 | case 0xC6: /* scroll lock released */ | |
371 | case 0xC5: /* num lock released */ | |
372 | case 0xBA: /* caps lock released */ | |
373 | return; /* just swallow */ | |
374 | } | |
375 | if((scancode&0x80)==0x80) /* key released */ | |
376 | return; | |
377 | /* now, decide which table we need */ | |
378 | if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */ | |
379 | PRINTF("unkown scancode %X\n",scancode); | |
380 | return; /* swallow it */ | |
381 | } | |
382 | /* setup plain code first */ | |
383 | keycode=kbd_plain_xlate[scancode]; | |
384 | if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */ | |
385 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
386 | PRINTF("unkown caps-locked scancode %X\n",scancode); | |
387 | return; /* swallow it */ | |
388 | } | |
389 | keycode=kbd_shift_xlate[scancode]; | |
390 | if(keycode<'A') { /* we only want the alphas capital */ | |
391 | keycode=kbd_plain_xlate[scancode]; | |
392 | } | |
393 | } | |
394 | if(shift==1) { /* shift overwrites caps_lock */ | |
395 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
396 | PRINTF("unkown shifted scancode %X\n",scancode); | |
397 | return; /* swallow it */ | |
398 | } | |
399 | keycode=kbd_shift_xlate[scancode]; | |
400 | } | |
401 | if(ctrl==1) { /* ctrl overwrites caps_lock and shift */ | |
402 | if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */ | |
403 | PRINTF("unkown ctrl scancode %X\n",scancode); | |
404 | return; /* swallow it */ | |
405 | } | |
406 | keycode=kbd_ctrl_xlate[scancode]; | |
407 | } | |
408 | /* check if valid keycode */ | |
409 | if(keycode==0xff) { | |
410 | PRINTF("unkown scancode %X\n",scancode); | |
411 | return; /* swallow unknown codes */ | |
412 | } | |
413 | ||
414 | kbd_put_queue(keycode); | |
415 | PRINTF("%x\n",keycode); | |
416 | } | |
417 | ||
418 | /* | |
419 | * This reads the keyboard status port, and does the | |
420 | * appropriate action. | |
421 | * | |
422 | */ | |
423 | unsigned char handle_kbd_event(void) | |
424 | { | |
425 | unsigned char status = kbd_read_status(); | |
426 | unsigned int work = 10000; | |
427 | ||
428 | while ((--work > 0) && (status & KBD_STAT_OBF)) { | |
429 | unsigned char scancode; | |
430 | ||
431 | scancode = kbd_read_input(); | |
432 | ||
433 | /* Error bytes must be ignored to make the | |
434 | Synaptics touchpads compaq use work */ | |
435 | /* Ignore error bytes */ | |
436 | if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR))) | |
437 | { | |
438 | if (status & KBD_STAT_MOUSE_OBF) | |
439 | ; /* not supported: handle_mouse_event(scancode); */ | |
440 | else | |
441 | handle_keyboard_event(scancode); | |
442 | } | |
443 | status = kbd_read_status(); | |
444 | } | |
445 | if (!work) | |
446 | PRINTF("pc_keyb: controller jammed (0x%02X).\n", status); | |
447 | return status; | |
448 | } | |
449 | ||
450 | ||
affae2bf WD |
451 | /****************************************************************************** |
452 | * Lowlevel Part of keyboard section | |
453 | */ | |
454 | unsigned char kbd_read_status(void) | |
455 | { | |
456 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT)); | |
457 | } | |
458 | ||
459 | unsigned char kbd_read_input(void) | |
460 | { | |
461 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT)); | |
462 | } | |
463 | ||
464 | void kbd_write_command(unsigned char cmd) | |
465 | { | |
466 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd); | |
467 | } | |
468 | ||
469 | void kbd_write_output(unsigned char data) | |
470 | { | |
471 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data); | |
472 | } | |
473 | ||
474 | int kbd_read_data(void) | |
475 | { | |
476 | int val; | |
477 | unsigned char status; | |
478 | ||
479 | val=-1; | |
480 | status = kbd_read_status(); | |
481 | if (status & KBD_STAT_OBF) { | |
482 | val = kbd_read_input(); | |
483 | if (status & (KBD_STAT_GTO | KBD_STAT_PERR)) | |
484 | val = -2; | |
485 | } | |
486 | return val; | |
487 | } | |
488 | ||
489 | int kbd_wait_for_input(void) | |
490 | { | |
491 | unsigned long timeout; | |
492 | int val; | |
493 | ||
494 | timeout = KBD_TIMEOUT; | |
495 | val=kbd_read_data(); | |
496 | while(val < 0) | |
497 | { | |
498 | if(timeout--==0) | |
499 | return -1; | |
500 | udelay(1000); | |
501 | val=kbd_read_data(); | |
502 | } | |
503 | return val; | |
504 | } | |
505 | ||
506 | ||
507 | int kb_wait(void) | |
508 | { | |
509 | unsigned long timeout = KBC_TIMEOUT * 10; | |
510 | ||
511 | do { | |
512 | unsigned char status = handle_kbd_event(); | |
513 | if (!(status & KBD_STAT_IBF)) | |
514 | return 0; /* ok */ | |
515 | udelay(1000); | |
516 | timeout--; | |
517 | } while (timeout); | |
518 | return 1; | |
519 | } | |
520 | ||
521 | void kbd_write_command_w(int data) | |
522 | { | |
523 | if(kb_wait()) | |
524 | PRINTF("timeout in kbd_write_command_w\n"); | |
525 | kbd_write_command(data); | |
526 | } | |
527 | ||
528 | void kbd_write_output_w(int data) | |
529 | { | |
530 | if(kb_wait()) | |
531 | PRINTF("timeout in kbd_write_output_w\n"); | |
532 | kbd_write_output(data); | |
533 | } | |
534 | ||
535 | void kbd_send_data(unsigned char data) | |
536 | { | |
537 | unsigned char status; | |
538 | disable_8259A_irq(1); /* disable interrupt */ | |
539 | kbd_write_output_w(data); | |
540 | status = kbd_wait_for_input(); | |
541 | if (status == KBD_REPLY_ACK) | |
542 | enable_8259A_irq(1); /* enable interrupt */ | |
543 | } | |
544 | ||
545 | ||
546 | char * kbd_initialize(void) | |
547 | { | |
548 | int status; | |
549 | ||
550 | in_pointer = 0; /* delete in Buffer */ | |
551 | out_pointer = 0; | |
552 | /* | |
553 | * Test the keyboard interface. | |
554 | * This seems to be the only way to get it going. | |
555 | * If the test is successful a x55 is placed in the input buffer. | |
556 | */ | |
557 | kbd_write_command_w(KBD_CCMD_SELF_TEST); | |
558 | if (kbd_wait_for_input() != 0x55) | |
559 | return "Kbd: failed self test"; | |
560 | /* | |
561 | * Perform a keyboard interface test. This causes the controller | |
562 | * to test the keyboard clock and data lines. The results of the | |
563 | * test are placed in the input buffer. | |
564 | */ | |
565 | kbd_write_command_w(KBD_CCMD_KBD_TEST); | |
566 | if (kbd_wait_for_input() != 0x00) | |
567 | return "Kbd: interface failed self test"; | |
568 | /* | |
569 | * Enable the keyboard by allowing the keyboard clock to run. | |
570 | */ | |
571 | kbd_write_command_w(KBD_CCMD_KBD_ENABLE); | |
572 | status = kbd_wait_for_input(); | |
573 | /* | |
574 | * Reset keyboard. If the read times out | |
575 | * then the assumption is that no keyboard is | |
576 | * plugged into the machine. | |
577 | * This defaults the keyboard to scan-code set 2. | |
578 | * | |
579 | * Set up to try again if the keyboard asks for RESEND. | |
580 | */ | |
581 | do { | |
582 | kbd_write_output_w(KBD_CMD_RESET); | |
583 | status = kbd_wait_for_input(); | |
584 | if (status == KBD_REPLY_ACK) | |
585 | break; | |
586 | if (status != KBD_REPLY_RESEND) | |
587 | { | |
588 | PRINTF("status: %X\n",status); | |
589 | return "Kbd: reset failed, no ACK"; | |
590 | } | |
591 | } while (1); | |
592 | if (kbd_wait_for_input() != KBD_REPLY_POR) | |
593 | return "Kbd: reset failed, no POR"; | |
594 | ||
595 | /* | |
596 | * Set keyboard controller mode. During this, the keyboard should be | |
597 | * in the disabled state. | |
598 | * | |
599 | * Set up to try again if the keyboard asks for RESEND. | |
600 | */ | |
601 | do { | |
602 | kbd_write_output_w(KBD_CMD_DISABLE); | |
603 | status = kbd_wait_for_input(); | |
604 | if (status == KBD_REPLY_ACK) | |
605 | break; | |
606 | if (status != KBD_REPLY_RESEND) | |
607 | return "Kbd: disable keyboard: no ACK"; | |
608 | } while (1); | |
609 | ||
610 | kbd_write_command_w(KBD_CCMD_WRITE_MODE); | |
611 | kbd_write_output_w(KBD_MODE_KBD_INT | |
612 | | KBD_MODE_SYS | |
613 | | KBD_MODE_DISABLE_MOUSE | |
614 | | KBD_MODE_KCC); | |
615 | ||
616 | /* ibm powerpc portables need this to use scan-code set 1 -- Cort */ | |
617 | kbd_write_command_w(KBD_CCMD_READ_MODE); | |
618 | if (!(kbd_wait_for_input() & KBD_MODE_KCC)) { | |
619 | /* | |
620 | * If the controller does not support conversion, | |
621 | * Set the keyboard to scan-code set 1. | |
622 | */ | |
623 | kbd_write_output_w(0xF0); | |
624 | kbd_wait_for_input(); | |
625 | kbd_write_output_w(0x01); | |
626 | kbd_wait_for_input(); | |
627 | } | |
628 | kbd_write_output_w(KBD_CMD_ENABLE); | |
629 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
630 | return "Kbd: enable keyboard: no ACK"; | |
631 | ||
632 | /* | |
633 | * Finally, set the typematic rate to maximum. | |
634 | */ | |
635 | kbd_write_output_w(KBD_CMD_SET_RATE); | |
636 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
637 | return "Kbd: Set rate: no ACK"; | |
638 | kbd_write_output_w(0x00); | |
639 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
640 | return "Kbd: Set rate: no ACK"; | |
641 | return NULL; | |
642 | } | |
643 | ||
644 | void kbd_interrupt(void) | |
645 | { | |
646 | handle_kbd_event(); | |
647 | } |