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Commit | Line | Data |
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c7de829c WD |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * John W. Linville, linville@tuxdriver.com | |
8bde7f77 | 4 | * |
c7de829c WD |
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 | |
c7de829c WD |
51 | |
52 | #ifdef KBG_DEBUG | |
53 | #define PRINTF(fmt,args...) printf (fmt ,##args) | |
54 | #else | |
55 | #define PRINTF(fmt,args...) | |
56 | #endif | |
57 | ||
58 | #define KBD_STAT_KOBF 0x01 | |
59 | #define KBD_STAT_IBF 0x02 | |
60 | #define KBD_STAT_SYS 0x04 | |
61 | #define KBD_STAT_CD 0x08 | |
62 | #define KBD_STAT_LOCK 0x10 | |
63 | #define KBD_STAT_MOBF 0x20 | |
64 | #define KBD_STAT_TI_OUT 0x40 | |
65 | #define KBD_STAT_PARERR 0x80 | |
66 | ||
67 | #define KBD_INIT_TIMEOUT 2000 /* Timeout in ms for initializing the keyboard */ | |
68 | #define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */ | |
69 | #define KBD_TIMEOUT 2000 /* Timeout in ms for keyboard command acknowledge */ | |
70 | /* | |
71 | * Keyboard Controller Commands | |
72 | */ | |
73 | ||
74 | #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */ | |
75 | #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */ | |
76 | #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */ | |
77 | #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ | |
78 | #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */ | |
79 | #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */ | |
80 | #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */ | |
81 | #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */ | |
82 | #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */ | |
83 | #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */ | |
84 | #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if | |
85 | initiated by the auxiliary device */ | |
86 | #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ | |
87 | ||
88 | /* | |
89 | * Keyboard Commands | |
90 | */ | |
91 | ||
92 | #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */ | |
93 | #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */ | |
94 | #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */ | |
95 | #define KBD_CMD_DISABLE 0xF5 /* Disable scanning */ | |
96 | #define KBD_CMD_RESET 0xFF /* Reset */ | |
97 | ||
98 | /* | |
99 | * Keyboard Replies | |
100 | */ | |
101 | ||
102 | #define KBD_REPLY_POR 0xAA /* Power on reset */ | |
103 | #define KBD_REPLY_ACK 0xFA /* Command ACK */ | |
104 | #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ | |
105 | ||
106 | /* | |
107 | * Status Register Bits | |
108 | */ | |
109 | ||
110 | #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ | |
111 | #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ | |
112 | #define KBD_STAT_SELFTEST 0x04 /* Self test successful */ | |
113 | #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */ | |
114 | #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */ | |
115 | #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ | |
116 | #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */ | |
117 | #define KBD_STAT_PERR 0x80 /* Parity error */ | |
118 | ||
119 | #define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF) | |
120 | ||
121 | /* | |
122 | * Controller Mode Register Bits | |
123 | */ | |
124 | ||
125 | #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */ | |
126 | #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */ | |
127 | #define KBD_MODE_SYS 0x04 /* The system flag (?) */ | |
128 | #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */ | |
129 | #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */ | |
130 | #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ | |
131 | #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ | |
132 | #define KBD_MODE_RFU 0x80 | |
133 | ||
134 | ||
135 | #define KDB_DATA_PORT 0x60 | |
136 | #define KDB_COMMAND_PORT 0x64 | |
137 | ||
138 | #define LED_SCR 0x01 /* scroll lock led */ | |
139 | #define LED_CAP 0x04 /* caps lock led */ | |
140 | #define LED_NUM 0x02 /* num lock led */ | |
141 | ||
142 | #define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */ | |
143 | ||
144 | ||
c7de829c WD |
145 | static volatile char kbd_buffer[KBD_BUFFER_LEN]; |
146 | static volatile int in_pointer = 0; | |
147 | static volatile int out_pointer = 0; | |
148 | ||
149 | ||
150 | static unsigned char num_lock = 0; | |
151 | static unsigned char caps_lock = 0; | |
152 | static unsigned char scroll_lock = 0; | |
153 | static unsigned char shift = 0; | |
154 | static unsigned char ctrl = 0; | |
155 | static unsigned char alt = 0; | |
156 | static unsigned char e0 = 0; | |
157 | static unsigned char leds = 0; | |
158 | ||
159 | #define DEVNAME "ps2kbd" | |
160 | ||
161 | /* Simple translation table for the keys */ | |
162 | ||
163 | static unsigned char kbd_plain_xlate[] = { | |
164 | 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */ | |
165 | 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */ | |
166 | 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */ | |
167 | 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
168 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
169 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
170 | '\r',0xff,0xff | |
171 | }; | |
8bde7f77 | 172 | |
c7de829c WD |
173 | static unsigned char kbd_shift_xlate[] = { |
174 | 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */ | |
175 | 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */ | |
176 | 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */ | |
177 | 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
178 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
179 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
180 | '\r',0xff,0xff | |
181 | }; | |
182 | ||
183 | static unsigned char kbd_ctrl_xlate[] = { | |
184 | 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */ | |
185 | 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */ | |
186 | 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */ | |
187 | 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */ | |
188 | 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */ | |
189 | '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */ | |
190 | '\r',0xff,0xff | |
191 | }; | |
192 | ||
193 | /****************************************************************** | |
8bde7f77 | 194 | * Init |
c7de829c WD |
195 | ******************************************************************/ |
196 | ||
197 | int isa_kbd_init(void) | |
198 | { | |
199 | char* result; | |
200 | result=kbd_initialize(); | |
201 | if (result != NULL) | |
202 | { | |
203 | result = kbd_initialize(); | |
204 | } | |
205 | if(result==NULL) { | |
206 | printf("AT Keyboard initialized\n"); | |
207 | irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL); | |
208 | return (1); | |
209 | } | |
210 | else { | |
211 | printf("%s\n",result); | |
212 | return (-1); | |
213 | } | |
214 | } | |
215 | ||
216 | #ifdef CFG_CONSOLE_OVERWRITE_ROUTINE | |
217 | extern int overwrite_console (void); | |
218 | #else | |
219 | int overwrite_console (void) | |
220 | { | |
221 | return (0); | |
222 | } | |
223 | #endif | |
224 | ||
225 | int drv_isa_kbd_init (void) | |
226 | { | |
227 | int error; | |
228 | device_t kbddev ; | |
229 | char *stdinname = getenv ("stdin"); | |
230 | ||
231 | if(isa_kbd_init()==-1) | |
232 | return -1; | |
233 | memset (&kbddev, 0, sizeof(kbddev)); | |
234 | strcpy(kbddev.name, DEVNAME); | |
235 | kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM; | |
236 | kbddev.putc = NULL ; | |
237 | kbddev.puts = NULL ; | |
238 | kbddev.getc = kbd_getc ; | |
239 | kbddev.tstc = kbd_testc ; | |
240 | ||
241 | error = device_register (&kbddev); | |
242 | if(error==0) { | |
243 | /* check if this is the standard input device */ | |
244 | if(strcmp(stdinname,DEVNAME)==0) { | |
245 | /* reassign the console */ | |
246 | if(overwrite_console()) { | |
247 | return 1; | |
248 | } | |
249 | error=console_assign(stdin,DEVNAME); | |
250 | if(error==0) | |
251 | return 1; | |
8bde7f77 | 252 | else |
c7de829c WD |
253 | return error; |
254 | } | |
255 | return 1; | |
256 | } | |
257 | return error; | |
258 | } | |
259 | ||
260 | /****************************************************************** | |
8bde7f77 | 261 | * Queue handling |
c7de829c WD |
262 | ******************************************************************/ |
263 | /* puts character in the queue and sets up the in and out pointer */ | |
264 | void kbd_put_queue(char data) | |
265 | { | |
266 | if((in_pointer+1)==KBD_BUFFER_LEN) { | |
267 | if(out_pointer==0) { | |
268 | return; /* buffer full */ | |
269 | } else{ | |
270 | in_pointer=0; | |
271 | } | |
272 | } else { | |
273 | if((in_pointer+1)==out_pointer) | |
274 | return; /* buffer full */ | |
275 | in_pointer++; | |
276 | } | |
277 | kbd_buffer[in_pointer]=data; | |
278 | return; | |
279 | } | |
280 | ||
281 | /* test if a character is in the queue */ | |
282 | int kbd_testc(void) | |
283 | { | |
284 | if(in_pointer==out_pointer) | |
285 | return(0); /* no data */ | |
286 | else | |
8bde7f77 | 287 | return(1); |
c7de829c WD |
288 | } |
289 | /* gets the character from the queue */ | |
290 | int kbd_getc(void) | |
291 | { | |
292 | char c; | |
293 | ||
294 | while(in_pointer==out_pointer); | |
8bde7f77 | 295 | if((out_pointer+1)==KBD_BUFFER_LEN) |
c7de829c WD |
296 | out_pointer=0; |
297 | else | |
298 | out_pointer++; | |
299 | c=kbd_buffer[out_pointer]; | |
300 | return (int)c; | |
8bde7f77 | 301 | |
c7de829c WD |
302 | } |
303 | ||
304 | ||
305 | /* set LEDs */ | |
306 | ||
307 | void kbd_set_leds(void) | |
308 | { | |
309 | if(caps_lock==0) | |
310 | leds&=~LED_CAP; /* switch caps_lock off */ | |
311 | else | |
312 | leds|=LED_CAP; /* switch on LED */ | |
313 | if(num_lock==0) | |
314 | leds&=~LED_NUM; /* switch LED off */ | |
315 | else | |
316 | leds|=LED_NUM; /* switch on LED */ | |
317 | if(scroll_lock==0) | |
318 | leds&=~LED_SCR; /* switch LED off */ | |
319 | else | |
320 | leds|=LED_SCR; /* switch on LED */ | |
321 | kbd_send_data(KBD_CMD_SET_LEDS); | |
322 | kbd_send_data(leds); | |
323 | } | |
8bde7f77 | 324 | |
c7de829c WD |
325 | |
326 | void handle_keyboard_event(unsigned char scancode) | |
327 | { | |
328 | unsigned char keycode; | |
329 | ||
330 | /* Convert scancode to keycode */ | |
331 | PRINTF("scancode %x\n",scancode); | |
332 | if(scancode==0xe0) { | |
333 | e0=1; /* special charakters */ | |
334 | return; | |
335 | } | |
336 | if(e0==1) { | |
337 | e0=0; /* delete flag */ | |
338 | if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */ | |
339 | ((scancode&0x7F)==0x1D)|| /* the right alt key */ | |
340 | ((scancode&0x7F)==0x35)|| /* the right '/' key */ | |
341 | ((scancode&0x7F)==0x1C)|| /* the right enter key */ | |
342 | ((scancode)==0x48)|| /* arrow up */ | |
343 | ((scancode)==0x50)|| /* arrow down */ | |
344 | ((scancode)==0x4b)|| /* arrow left */ | |
345 | ((scancode)==0x4d))) /* arrow right */ | |
346 | /* we swallow unknown e0 codes */ | |
347 | return; | |
348 | } | |
349 | /* special cntrl keys */ | |
350 | switch(scancode) | |
351 | { | |
352 | case 0x48: | |
353 | kbd_put_queue(27); | |
354 | kbd_put_queue(91); | |
355 | kbd_put_queue('A'); | |
356 | return; | |
357 | case 0x50: | |
358 | kbd_put_queue(27); | |
359 | kbd_put_queue(91); | |
360 | kbd_put_queue('B'); | |
361 | return; | |
362 | case 0x4b: | |
363 | kbd_put_queue(27); | |
364 | kbd_put_queue(91); | |
365 | kbd_put_queue('D'); | |
366 | return; | |
367 | case 0x4D: | |
368 | kbd_put_queue(27); | |
369 | kbd_put_queue(91); | |
370 | kbd_put_queue('C'); | |
371 | return; | |
372 | case 0x58: /* F12 key */ | |
373 | if (ctrl == 1) | |
374 | { | |
375 | extern int console_changed; | |
376 | setenv("stdin", DEVNAME); | |
377 | setenv("stdout", "vga"); | |
378 | console_changed = 1; | |
379 | } | |
380 | return; | |
8bde7f77 | 381 | case 0x2A: |
c7de829c WD |
382 | case 0x36: /* shift pressed */ |
383 | shift=1; | |
384 | return; /* do nothing else */ | |
8bde7f77 | 385 | case 0xAA: |
c7de829c WD |
386 | case 0xB6: /* shift released */ |
387 | shift=0; | |
388 | return; /* do nothing else */ | |
389 | case 0x38: /* alt pressed */ | |
390 | alt=1; | |
391 | return; /* do nothing else */ | |
392 | case 0xB8: /* alt released */ | |
393 | alt=0; | |
394 | return; /* do nothing else */ | |
395 | case 0x1d: /* ctrl pressed */ | |
396 | ctrl=1; | |
397 | return; /* do nothing else */ | |
398 | case 0x9d: /* ctrl released */ | |
399 | ctrl=0; | |
400 | return; /* do nothing else */ | |
401 | case 0x46: /* scrollock pressed */ | |
402 | scroll_lock=~scroll_lock; | |
403 | kbd_set_leds(); | |
404 | return; /* do nothing else */ | |
405 | case 0x3A: /* capslock pressed */ | |
406 | caps_lock=~caps_lock; | |
407 | kbd_set_leds(); | |
8bde7f77 | 408 | return; |
c7de829c WD |
409 | case 0x45: /* numlock pressed */ |
410 | num_lock=~num_lock; | |
411 | kbd_set_leds(); | |
8bde7f77 | 412 | return; |
c7de829c WD |
413 | case 0xC6: /* scroll lock released */ |
414 | case 0xC5: /* num lock released */ | |
415 | case 0xBA: /* caps lock released */ | |
8bde7f77 | 416 | return; /* just swallow */ |
c7de829c WD |
417 | } |
418 | if((scancode&0x80)==0x80) /* key released */ | |
419 | return; | |
420 | /* now, decide which table we need */ | |
421 | if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */ | |
422 | PRINTF("unkown scancode %X\n",scancode); | |
423 | return; /* swallow it */ | |
424 | } | |
425 | /* setup plain code first */ | |
426 | keycode=kbd_plain_xlate[scancode]; | |
427 | if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */ | |
428 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
429 | PRINTF("unkown caps-locked scancode %X\n",scancode); | |
430 | return; /* swallow it */ | |
431 | } | |
432 | keycode=kbd_shift_xlate[scancode]; | |
433 | if(keycode<'A') { /* we only want the alphas capital */ | |
434 | keycode=kbd_plain_xlate[scancode]; | |
435 | } | |
436 | } | |
437 | if(shift==1) { /* shift overwrites caps_lock */ | |
438 | if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */ | |
439 | PRINTF("unkown shifted scancode %X\n",scancode); | |
440 | return; /* swallow it */ | |
441 | } | |
442 | keycode=kbd_shift_xlate[scancode]; | |
443 | } | |
444 | if(ctrl==1) { /* ctrl overwrites caps_lock and shift */ | |
445 | if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */ | |
446 | PRINTF("unkown ctrl scancode %X\n",scancode); | |
447 | return; /* swallow it */ | |
448 | } | |
449 | keycode=kbd_ctrl_xlate[scancode]; | |
450 | } | |
451 | /* check if valid keycode */ | |
452 | if(keycode==0xff) { | |
453 | PRINTF("unkown scancode %X\n",scancode); | |
454 | return; /* swallow unknown codes */ | |
455 | } | |
8bde7f77 | 456 | |
c7de829c WD |
457 | kbd_put_queue(keycode); |
458 | PRINTF("%x\n",keycode); | |
459 | } | |
460 | ||
461 | /* | |
462 | * This reads the keyboard status port, and does the | |
463 | * appropriate action. | |
464 | * | |
465 | */ | |
466 | unsigned char handle_kbd_event(void) | |
467 | { | |
468 | unsigned char status = kbd_read_status(); | |
469 | unsigned int work = 10000; | |
470 | ||
471 | while ((--work > 0) && (status & KBD_STAT_OBF)) { | |
472 | unsigned char scancode; | |
473 | ||
474 | scancode = kbd_read_input(); | |
475 | ||
476 | /* Error bytes must be ignored to make the | |
477 | Synaptics touchpads compaq use work */ | |
478 | /* Ignore error bytes */ | |
479 | if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR))) | |
480 | { | |
481 | if (status & KBD_STAT_MOUSE_OBF) | |
482 | ; /* not supported: handle_mouse_event(scancode); */ | |
483 | else | |
484 | handle_keyboard_event(scancode); | |
485 | } | |
486 | status = kbd_read_status(); | |
487 | } | |
488 | if (!work) | |
489 | PRINTF("pc_keyb: controller jammed (0x%02X).\n", status); | |
490 | return status; | |
491 | } | |
492 | ||
493 | ||
c7de829c WD |
494 | /****************************************************************************** |
495 | * Lowlevel Part of keyboard section | |
8bde7f77 | 496 | */ |
c7de829c WD |
497 | unsigned char kbd_read_status(void) |
498 | { | |
499 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT)); | |
8bde7f77 WD |
500 | } |
501 | ||
c7de829c WD |
502 | unsigned char kbd_read_input(void) |
503 | { | |
504 | return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT)); | |
8bde7f77 | 505 | } |
c7de829c WD |
506 | |
507 | void kbd_write_command(unsigned char cmd) | |
508 | { | |
509 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd); | |
8bde7f77 WD |
510 | } |
511 | ||
c7de829c WD |
512 | void kbd_write_output(unsigned char data) |
513 | { | |
514 | out8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data); | |
8bde7f77 WD |
515 | } |
516 | ||
c7de829c WD |
517 | int kbd_read_data(void) |
518 | { | |
519 | int val; | |
520 | unsigned char status; | |
521 | ||
522 | val=-1; | |
523 | status = kbd_read_status(); | |
524 | if (status & KBD_STAT_OBF) { | |
525 | val = kbd_read_input(); | |
526 | if (status & (KBD_STAT_GTO | KBD_STAT_PERR)) | |
527 | val = -2; | |
528 | } | |
529 | return val; | |
530 | } | |
531 | ||
532 | int kbd_wait_for_input(void) | |
533 | { | |
534 | unsigned long timeout; | |
535 | int val; | |
8bde7f77 | 536 | |
c7de829c WD |
537 | timeout = KBD_TIMEOUT; |
538 | val=kbd_read_data(); | |
539 | while(val < 0) | |
540 | { | |
541 | if(timeout--==0) | |
542 | return -1; | |
543 | udelay(1000); | |
544 | val=kbd_read_data(); | |
545 | } | |
546 | return val; | |
547 | } | |
548 | ||
549 | ||
550 | int kb_wait(void) | |
551 | { | |
552 | unsigned long timeout = KBC_TIMEOUT * 10; | |
553 | ||
554 | do { | |
555 | unsigned char status = handle_kbd_event(); | |
556 | if (!(status & KBD_STAT_IBF)) | |
557 | return 0; /* ok */ | |
558 | udelay(1000); | |
559 | timeout--; | |
560 | } while (timeout); | |
561 | return 1; | |
562 | } | |
563 | ||
564 | void kbd_write_command_w(int data) | |
565 | { | |
566 | if(kb_wait()) | |
567 | PRINTF("timeout in kbd_write_command_w\n"); | |
568 | kbd_write_command(data); | |
569 | } | |
570 | ||
571 | void kbd_write_output_w(int data) | |
572 | { | |
573 | if(kb_wait()) | |
574 | PRINTF("timeout in kbd_write_output_w\n"); | |
575 | kbd_write_output(data); | |
576 | } | |
577 | ||
578 | void kbd_send_data(unsigned char data) | |
579 | { | |
580 | unsigned char status; | |
581 | i8259_mask_irq(KBD_INTERRUPT); /* disable interrupt */ | |
582 | kbd_write_output_w(data); | |
583 | status = kbd_wait_for_input(); | |
584 | if (status == KBD_REPLY_ACK) | |
585 | i8259_unmask_irq(KBD_INTERRUPT); /* enable interrupt */ | |
586 | } | |
587 | ||
588 | ||
589 | char * kbd_initialize(void) | |
590 | { | |
591 | int status; | |
592 | ||
593 | in_pointer = 0; /* delete in Buffer */ | |
594 | out_pointer = 0; | |
595 | /* | |
596 | * Test the keyboard interface. | |
597 | * This seems to be the only way to get it going. | |
598 | * If the test is successful a x55 is placed in the input buffer. | |
599 | */ | |
600 | kbd_write_command_w(KBD_CCMD_SELF_TEST); | |
8bde7f77 | 601 | if (kbd_wait_for_input() != 0x55) |
c7de829c WD |
602 | return "Kbd: failed self test"; |
603 | /* | |
604 | * Perform a keyboard interface test. This causes the controller | |
605 | * to test the keyboard clock and data lines. The results of the | |
606 | * test are placed in the input buffer. | |
607 | */ | |
608 | kbd_write_command_w(KBD_CCMD_KBD_TEST); | |
8bde7f77 | 609 | if (kbd_wait_for_input() != 0x00) |
c7de829c WD |
610 | return "Kbd: interface failed self test"; |
611 | /* | |
612 | * Enable the keyboard by allowing the keyboard clock to run. | |
613 | */ | |
614 | kbd_write_command_w(KBD_CCMD_KBD_ENABLE); | |
615 | status = kbd_wait_for_input(); | |
616 | /* | |
617 | * Reset keyboard. If the read times out | |
618 | * then the assumption is that no keyboard is | |
619 | * plugged into the machine. | |
620 | * This defaults the keyboard to scan-code set 2. | |
621 | * | |
622 | * Set up to try again if the keyboard asks for RESEND. | |
623 | */ | |
624 | do { | |
625 | kbd_write_output_w(KBD_CMD_RESET); | |
626 | status = kbd_wait_for_input(); | |
8bde7f77 | 627 | if (status == KBD_REPLY_ACK) |
c7de829c WD |
628 | break; |
629 | if (status != KBD_REPLY_RESEND) | |
630 | { | |
631 | PRINTF("status: %X\n",status); | |
632 | return "Kbd: reset failed, no ACK"; | |
633 | } | |
634 | } while (1); | |
635 | if (kbd_wait_for_input() != KBD_REPLY_POR) | |
636 | return "Kbd: reset failed, no POR"; | |
637 | ||
638 | /* | |
639 | * Set keyboard controller mode. During this, the keyboard should be | |
640 | * in the disabled state. | |
641 | * | |
642 | * Set up to try again if the keyboard asks for RESEND. | |
643 | */ | |
644 | do { | |
645 | kbd_write_output_w(KBD_CMD_DISABLE); | |
646 | status = kbd_wait_for_input(); | |
647 | if (status == KBD_REPLY_ACK) | |
648 | break; | |
649 | if (status != KBD_REPLY_RESEND) | |
650 | return "Kbd: disable keyboard: no ACK"; | |
651 | } while (1); | |
652 | ||
653 | kbd_write_command_w(KBD_CCMD_WRITE_MODE); | |
654 | kbd_write_output_w(KBD_MODE_KBD_INT | |
655 | | KBD_MODE_SYS | |
656 | | KBD_MODE_DISABLE_MOUSE | |
657 | | KBD_MODE_KCC); | |
658 | ||
659 | /* ibm powerpc portables need this to use scan-code set 1 -- Cort */ | |
660 | kbd_write_command_w(KBD_CCMD_READ_MODE); | |
661 | if (!(kbd_wait_for_input() & KBD_MODE_KCC)) { | |
662 | /* | |
663 | * If the controller does not support conversion, | |
664 | * Set the keyboard to scan-code set 1. | |
665 | */ | |
666 | kbd_write_output_w(0xF0); | |
667 | kbd_wait_for_input(); | |
668 | kbd_write_output_w(0x01); | |
669 | kbd_wait_for_input(); | |
670 | } | |
671 | kbd_write_output_w(KBD_CMD_ENABLE); | |
672 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
673 | return "Kbd: enable keyboard: no ACK"; | |
674 | ||
675 | /* | |
676 | * Finally, set the typematic rate to maximum. | |
677 | */ | |
678 | kbd_write_output_w(KBD_CMD_SET_RATE); | |
679 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
680 | return "Kbd: Set rate: no ACK"; | |
681 | kbd_write_output_w(0x00); | |
682 | if (kbd_wait_for_input() != KBD_REPLY_ACK) | |
683 | return "Kbd: Set rate: no ACK"; | |
684 | return NULL; | |
685 | } | |
686 | ||
687 | void kbd_interrupt(void) | |
688 | { | |
689 | handle_kbd_event(); | |
690 | } |