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Kevin O'Connorf076a3e2008-02-25 22:25:15 -05001// 16bit code to handle keyboard requests.
2//
3// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4// Copyright (C) 2002 MandrakeSoft S.A.
5//
6// This file may be distributed under the terms of the GNU GPLv3 license.
7
8#include "biosvar.h" // struct bregs
9#include "util.h" // debug_enter
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -050010#include "config.h" // CONFIG_*
Kevin O'Connorf076a3e2008-02-25 22:25:15 -050011
Kevin O'Connor2018eff2008-03-12 21:27:02 -040012//--------------------------------------------------------------------------
13// keyboard_panic
14//--------------------------------------------------------------------------
15static void
16keyboard_panic(u16 status)
17{
18 // If you're getting a 993 keyboard panic here,
19 // please see the comment in keyboard_init
20
21 BX_PANIC("Keyboard error:%u\n",status);
22}
23
24static void
25kbd_flush(u8 code)
26{
27 u16 max = 0xffff;
28 while ((inb(PORT_PS2_STATUS) & 0x02) && (--max > 0))
29 outb(code, PORT_DIAG);
30 if (!max && code != 0xff)
31 keyboard_panic(code);
32}
33
34static void
35kbd_waitdata(u8 code)
36{
37 u16 max = 0xffff;
38 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
39 outb(code, PORT_DIAG);
40 if (!max)
41 keyboard_panic(code);
42}
43
44//--------------------------------------------------------------------------
45// keyboard_init
46//--------------------------------------------------------------------------
47// this file is based on LinuxBIOS implementation of keyboard.c
48static void
49keyboard_init()
50{
51 /* ------------------- Flush buffers ------------------------*/
52 /* Wait until buffer is empty */
53 kbd_flush(0xff);
54
55 /* flush incoming keys */
56 u16 max=0x2000;
57 while (--max > 0) {
58 outb(0x00, PORT_DIAG);
59 if (inb(PORT_PS2_STATUS) & 0x01) {
60 inb(PORT_PS2_DATA);
61 max = 0x2000;
62 }
63 }
64
65 // Due to timer issues, and if the IPS setting is > 15000000,
66 // the incoming keys might not be flushed here. That will
67 // cause a panic a few lines below. See sourceforge bug report :
68 // [ 642031 ] FATAL: Keyboard RESET error:993
69
70 /* ------------------- controller side ----------------------*/
71 /* send cmd = 0xAA, self test 8042 */
72 outb(0xaa, PORT_PS2_STATUS);
73
74 kbd_flush(0x00);
75 kbd_waitdata(0x01);
76
77 /* read self-test result, 0x55 should be returned from 0x60 */
78 if (inb(PORT_PS2_DATA) != 0x55)
79 keyboard_panic(991);
80
81 /* send cmd = 0xAB, keyboard interface test */
82 outb(0xab, PORT_PS2_STATUS);
83
84 kbd_flush(0x10);
85 kbd_waitdata(0x11);
86
87 /* read keyboard interface test result, */
88 /* 0x00 should be returned form 0x60 */
89 if (inb(PORT_PS2_DATA) != 0x00)
90 keyboard_panic(992);
91
92 /* Enable Keyboard clock */
93 outb(0xae, PORT_PS2_STATUS);
94 outb(0xa8, PORT_PS2_STATUS);
95
96 /* ------------------- keyboard side ------------------------*/
97 /* reset kerboard and self test (keyboard side) */
98 outb(0xff, PORT_PS2_DATA);
99
100 kbd_flush(0x20);
101 kbd_waitdata(0x21);
102
103 /* keyboard should return ACK */
104 if (inb(PORT_PS2_DATA) != 0xfa)
105 keyboard_panic(993);
106
107 kbd_waitdata(0x31);
108
109 if (inb(PORT_PS2_DATA) != 0xaa)
110 keyboard_panic(994);
111
112 /* Disable keyboard */
113 outb(0xf5, PORT_PS2_DATA);
114
115 kbd_flush(0x40);
116 kbd_waitdata(0x41);
117
118 /* keyboard should return ACK */
119 if (inb(PORT_PS2_DATA) != 0xfa)
120 keyboard_panic(995);
121
122 /* Write Keyboard Mode */
123 outb(0x60, PORT_PS2_STATUS);
124
125 kbd_flush(0x50);
126
127 /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
128 outb(0x61, PORT_PS2_DATA);
129
130 kbd_flush(0x60);
131
132 /* Enable keyboard */
133 outb(0xf4, PORT_PS2_DATA);
134
135 kbd_flush(0x70);
136 kbd_waitdata(0x71);
137
138 /* keyboard should return ACK */
139 if (inb(PORT_PS2_DATA) != 0xfa)
140 keyboard_panic(996);
141
142 outb(0x77, PORT_DIAG);
143}
144
145void
146kbd_setup()
147{
148 u16 x = offsetof(struct bios_data_area_s, kbd_buf) - 0x400;
149 SET_BDA(kbd_mode, 0x10);
150 SET_BDA(kbd_buf_head, x);
151 SET_BDA(kbd_buf_tail, x);
152 SET_BDA(kbd_buf_start_offset, x);
153
154 SET_BDA(kbd_buf_end_offset
155 , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
156
157 keyboard_init();
158}
159
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500160static u8
161enqueue_key(u8 scan_code, u8 ascii_code)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500162{
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500163 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
164 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
165
166 u16 buffer_head = GET_BDA(kbd_buf_head);
167 u16 buffer_tail = GET_BDA(kbd_buf_tail);
168
169 u16 temp_tail = buffer_tail;
170 buffer_tail += 2;
171 if (buffer_tail >= buffer_end)
172 buffer_tail = buffer_start;
173
174 if (buffer_tail == buffer_head)
175 return 0;
176
Kevin O'Connor438f6352008-03-30 21:46:53 -0400177 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+0), ascii_code);
178 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+1), scan_code);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500179 SET_BDA(kbd_buf_tail, buffer_tail);
180 return 1;
181}
182
183static u8
184dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr)
185{
186 u16 buffer_head;
187 u16 buffer_tail;
188 for (;;) {
189 buffer_head = GET_BDA(kbd_buf_head);
190 buffer_tail = GET_BDA(kbd_buf_tail);
191
192 if (buffer_head != buffer_tail)
193 break;
194 if (!incr)
195 return 0;
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500196 nop();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500197 }
198
Kevin O'Connor438f6352008-03-30 21:46:53 -0400199 *ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+0));
200 *scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+1));
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500201
202 if (incr) {
203 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
204 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
205
206 buffer_head += 2;
207 if (buffer_head >= buffer_end)
208 buffer_head = buffer_start;
209 SET_BDA(kbd_buf_head, buffer_head);
210 }
211 return 1;
212}
213
214// read keyboard input
215static void
216handle_1600(struct bregs *regs)
217{
218 u8 scan_code, ascii_code;
219 dequeue_key(&scan_code, &ascii_code, 1);
220 if (scan_code != 0 && ascii_code == 0xF0)
221 ascii_code = 0;
222 else if (ascii_code == 0xE0)
223 ascii_code = 0;
224 regs->ax = (scan_code << 8) | ascii_code;
225}
226
227// check keyboard status
228static void
229handle_1601(struct bregs *regs)
230{
231 u8 scan_code, ascii_code;
232 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
233 regs->flags |= F_ZF;
234 return;
235 }
236 if (scan_code != 0 && ascii_code == 0xF0)
237 ascii_code = 0;
238 else if (ascii_code == 0xE0)
239 ascii_code = 0;
240 regs->ax = (scan_code << 8) | ascii_code;
241 regs->flags &= ~F_ZF;
242}
243
244// get shift flag status
245static void
246handle_1602(struct bregs *regs)
247{
248 regs->al = GET_BDA(kbd_flag0);
249}
250
251// store key-stroke into buffer
252static void
253handle_1605(struct bregs *regs)
254{
255 regs->al = !enqueue_key(regs->ch, regs->cl);
256}
257
258// GET KEYBOARD FUNCTIONALITY
259static void
260handle_1609(struct bregs *regs)
261{
262 // bit Bochs Description
263 // 7 0 reserved
264 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
265 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
266 // 4 1 INT 16/AH=0Ah supported
267 // 3 0 INT 16/AX=0306h supported
268 // 2 0 INT 16/AX=0305h supported
269 // 1 0 INT 16/AX=0304h supported
270 // 0 0 INT 16/AX=0300h supported
271 //
272 regs->al = 0x30;
273}
274
275// GET KEYBOARD ID
276static void
277handle_160a(struct bregs *regs)
278{
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500279 outb(0xf2, PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500280 /* Wait for data */
281 u16 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500282 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500283 outb(0x00, PORT_DIAG);
284 if (!max)
285 return;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500286 if (inb(PORT_PS2_DATA) != 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500287 regs->bx = 0;
288 return;
289 }
290 u16 kbd_code = 0;
291 u8 count = 2;
292 do {
293 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500294 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500295 outb(0x00, PORT_DIAG);
296 if (max>0x0) {
297 kbd_code >>= 8;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500298 kbd_code |= (inb(PORT_PS2_DATA) << 8);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500299 }
300 } while (--count>0);
301 regs->bx = kbd_code;
302}
303
304// read MF-II keyboard input
305static void
306handle_1610(struct bregs *regs)
307{
308 u8 scan_code, ascii_code;
309 dequeue_key(&scan_code, &ascii_code, 1);
310 if (scan_code != 0 && ascii_code == 0xF0)
311 ascii_code = 0;
312 regs->ax = (scan_code << 8) | ascii_code;
313}
314
315// check MF-II keyboard status
316static void
317handle_1611(struct bregs *regs)
318{
319 u8 scan_code, ascii_code;
320 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
321 regs->flags |= F_ZF;
322 return;
323 }
324 if (scan_code != 0 && ascii_code == 0xF0)
325 ascii_code = 0;
326 regs->ax = (scan_code << 8) | ascii_code;
327 regs->flags &= ~F_ZF;
328}
329
330// get extended keyboard status
331static void
332handle_1612(struct bregs *regs)
333{
334 regs->al = GET_BDA(kbd_flag0);
335 regs->ah = (GET_BDA(kbd_flag1) & 0x73) | (GET_BDA(kbd_mode) & 0x0c);
336 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
337}
338
339static void
340handle_166f(struct bregs *regs)
341{
342 if (regs->al == 0x08)
343 // unsupported, aka normal keyboard
344 regs->ah = 2;
345}
346
347// keyboard capability check called by DOS 5.0+ keyb
348static void
349handle_1692(struct bregs *regs)
350{
351 // function int16 ah=0x10-0x12 supported
352 regs->ah = 0x80;
353}
354
355// 122 keys capability check called by DOS 5.0+ keyb
356static void
357handle_16a2(struct bregs *regs)
358{
359 // don't change AH : function int16 ah=0x20-0x22 NOT supported
360}
361
362static void
363set_leds()
364{
365 u8 shift_flags = GET_BDA(kbd_flag0);
366 u8 led_flags = GET_BDA(kbd_led);
367 if (((shift_flags >> 4) & 0x07) ^ ((led_flags & 0x07) == 0))
368 return;
369
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500370 outb(0xed, PORT_PS2_DATA);
371 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500372 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500373 if (inb(PORT_PS2_DATA) == 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500374 led_flags &= 0xf8;
375 led_flags |= (shift_flags >> 4) & 0x07;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500376 outb(led_flags & 0x07, PORT_PS2_DATA);
377 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500378 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500379 inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500380 SET_BDA(kbd_led, led_flags);
381 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500382}
383
384// INT 16h Keyboard Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500385void VISIBLE16
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500386handle_16(struct bregs *regs)
387{
Kevin O'Connored128492008-03-11 11:14:59 -0400388 //debug_enter(regs);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500389
390 set_leds();
391
392 irq_enable();
393
394 switch (regs->ah) {
395 case 0x00: handle_1600(regs); break;
396 case 0x01: handle_1601(regs); break;
397 case 0x02: handle_1602(regs); break;
398 case 0x05: handle_1605(regs); break;
399 case 0x09: handle_1609(regs); break;
400 case 0x0a: handle_160a(regs); break;
401 case 0x10: handle_1610(regs); break;
402 case 0x11: handle_1611(regs); break;
403 case 0x12: handle_1612(regs); break;
404 case 0x92: handle_1692(regs); break;
405 case 0xa2: handle_16a2(regs); break;
406 case 0x6f: handle_166f(regs); break;
407 }
408}
409
410#define none 0
411#define MAX_SCAN_CODE 0x58
412
413static struct scaninfo {
414 u16 normal;
415 u16 shift;
416 u16 control;
417 u16 alt;
418 u8 lock_flags;
419} scan_to_scanascii[MAX_SCAN_CODE + 1] = {
420 { none, none, none, none, none },
421 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
422 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
423 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
424 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
425 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
426 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
427 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
428 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
429 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
430 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
431 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
432 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
433 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
434 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
435 { 0x0f09, 0x0f00, none, none, none }, /* tab */
436 { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
437 { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
438 { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
439 { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
440 { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
441 { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
442 { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
443 { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
444 { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
445 { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
446 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
447 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
448 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
449 { none, none, none, none, none }, /* L Ctrl */
450 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
451 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
452 { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
453 { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
454 { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
455 { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
456 { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
457 { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
458 { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
459 { 0x273b, 0x273a, none, none, none }, /* ;: */
460 { 0x2827, 0x2822, none, none, none }, /* '" */
461 { 0x2960, 0x297e, none, none, none }, /* `~ */
462 { none, none, none, none, none }, /* L shift */
463 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
464 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
465 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
466 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
467 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
468 { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
469 { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
470 { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
471 { 0x332c, 0x333c, none, none, none }, /* ,< */
472 { 0x342e, 0x343e, none, none, none }, /* .> */
473 { 0x352f, 0x353f, none, none, none }, /* /? */
474 { none, none, none, none, none }, /* R Shift */
475 { 0x372a, 0x372a, none, none, none }, /* * */
476 { none, none, none, none, none }, /* L Alt */
477 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
478 { none, none, none, none, none }, /* caps lock */
479 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
480 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
481 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
482 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
483 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
484 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
485 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
486 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
487 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
488 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
489 { none, none, none, none, none }, /* Num Lock */
490 { none, none, none, none, none }, /* Scroll Lock */
491 { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
492 { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
493 { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
494 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
495 { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
496 { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
497 { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
498 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
499 { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
500 { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
501 { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
502 { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
503 { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
504 { none, none, none, none, none },
505 { none, none, none, none, none },
506 { 0x565c, 0x567c, none, none, none }, /* \| */
507 { 0x5700, 0x5700, none, none, none }, /* F11 */
508 { 0x5800, 0x5800, none, none, none } /* F12 */
509};
510
511static void
512process_key(u8 scancode)
513{
514 u8 shift_flags = GET_BDA(kbd_flag0);
515 u8 mf2_flags = GET_BDA(kbd_flag1);
516 u8 mf2_state = GET_BDA(kbd_mode);
517
518 switch (scancode) {
519 case 0x00:
520 BX_INFO("KBD: int09 handler: AL=0\n");
521 return;
522
523 case 0x3a: /* Caps Lock press */
524 shift_flags ^= 0x40;
525 SET_BDA(kbd_flag0, shift_flags);
526 mf2_flags |= 0x40;
527 SET_BDA(kbd_flag1, mf2_flags);
528 break;
529 case 0xba: /* Caps Lock release */
530 mf2_flags &= ~0x40;
531 SET_BDA(kbd_flag1, mf2_flags);
532 break;
533
534 case 0x2a: /* L Shift press */
535 shift_flags |= 0x02;
536 SET_BDA(kbd_flag0, shift_flags);
537 break;
538 case 0xaa: /* L Shift release */
539 shift_flags &= ~0x02;
540 SET_BDA(kbd_flag0, shift_flags);
541 break;
542
543 case 0x36: /* R Shift press */
544 shift_flags |= 0x01;
545 SET_BDA(kbd_flag0, shift_flags);
546 break;
547 case 0xb6: /* R Shift release */
548 shift_flags &= ~0x01;
549 SET_BDA(kbd_flag0, shift_flags);
550 break;
551
552 case 0x1d: /* Ctrl press */
553 if ((mf2_state & 0x01) == 0) {
554 shift_flags |= 0x04;
555 SET_BDA(kbd_flag0, shift_flags);
556 if (mf2_state & 0x02) {
557 mf2_state |= 0x04;
558 SET_BDA(kbd_mode, mf2_state);
559 } else {
560 mf2_flags |= 0x01;
561 SET_BDA(kbd_flag1, mf2_flags);
562 }
563 }
564 break;
565 case 0x9d: /* Ctrl release */
566 if ((mf2_state & 0x01) == 0) {
567 shift_flags &= ~0x04;
568 SET_BDA(kbd_flag0, shift_flags);
569 if (mf2_state & 0x02) {
570 mf2_state &= ~0x04;
571 SET_BDA(kbd_mode, mf2_state);
572 } else {
573 mf2_flags &= ~0x01;
574 SET_BDA(kbd_flag1, mf2_flags);
575 }
576 }
577 break;
578
579 case 0x38: /* Alt press */
580 shift_flags |= 0x08;
581 SET_BDA(kbd_flag0, shift_flags);
582 if (mf2_state & 0x02) {
583 mf2_state |= 0x08;
584 SET_BDA(kbd_mode, mf2_state);
585 } else {
586 mf2_flags |= 0x02;
587 SET_BDA(kbd_flag1, mf2_flags);
588 }
589 break;
590 case 0xb8: /* Alt release */
591 shift_flags &= ~0x08;
592 SET_BDA(kbd_flag0, shift_flags);
593 if (mf2_state & 0x02) {
594 mf2_state &= ~0x08;
595 SET_BDA(kbd_mode, mf2_state);
596 } else {
597 mf2_flags &= ~0x02;
598 SET_BDA(kbd_flag1, mf2_flags);
599 }
600 break;
601
602 case 0x45: /* Num Lock press */
603 if ((mf2_state & 0x03) == 0) {
604 mf2_flags |= 0x20;
605 SET_BDA(kbd_flag1, mf2_flags);
606 shift_flags ^= 0x20;
607 SET_BDA(kbd_flag0, shift_flags);
608 }
609 break;
610 case 0xc5: /* Num Lock release */
611 if ((mf2_state & 0x03) == 0) {
612 mf2_flags &= ~0x20;
613 SET_BDA(kbd_flag1, mf2_flags);
614 }
615 break;
616
617 case 0x46: /* Scroll Lock press */
618 mf2_flags |= 0x10;
619 SET_BDA(kbd_flag1, mf2_flags);
620 shift_flags ^= 0x10;
621 SET_BDA(kbd_flag0, shift_flags);
622 break;
623 case 0xc6: /* Scroll Lock release */
624 mf2_flags &= ~0x10;
625 SET_BDA(kbd_flag1, mf2_flags);
626 break;
627
628 case 0xe0:
629 // Extended key
630 SETBITS_BDA(kbd_mode, 0x02);
631 return;
632 case 0xe1:
633 // Pause key
634 SETBITS_BDA(kbd_mode, 0x01);
635 return;
636
637 default:
638 if (scancode & 0x80) {
639 break; /* toss key releases ... */
640 }
641 if (scancode > MAX_SCAN_CODE) {
Kevin O'Connor438f6352008-03-30 21:46:53 -0400642 BX_INFO("KBD: int09h_handler(): unknown scancode read: 0x%02x!\n"
643 , scancode);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500644 return;
645 }
646 u8 asciicode;
647 struct scaninfo *info = &scan_to_scanascii[scancode];
648 if (shift_flags & 0x08) { /* ALT */
649 asciicode = GET_VAR(CS, info->alt);
650 scancode = GET_VAR(CS, info->alt) >> 8;
651 } else if (shift_flags & 0x04) { /* CONTROL */
652 asciicode = GET_VAR(CS, info->control);
653 scancode = GET_VAR(CS, info->control) >> 8;
Kevin O'Connor438f6352008-03-30 21:46:53 -0400654 } else if ((mf2_state & 0x02) > 0
655 && scancode >= 0x47 && scancode <= 0x53) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500656 /* extended keys handling */
657 asciicode = 0xe0;
658 scancode = GET_VAR(CS, info->normal) >> 8;
659 } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
660 /* check if lock state should be ignored
661 * because a SHIFT key are pressed */
662
663 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
664 asciicode = GET_VAR(CS, info->normal);
665 scancode = GET_VAR(CS, info->normal) >> 8;
666 } else {
667 asciicode = GET_VAR(CS, info->shift);
668 scancode = GET_VAR(CS, info->shift) >> 8;
669 }
670 } else {
671 /* check if lock is on */
672 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
673 asciicode = GET_VAR(CS, info->shift);
674 scancode = GET_VAR(CS, info->shift) >> 8;
675 } else {
676 asciicode = GET_VAR(CS, info->normal);
677 scancode = GET_VAR(CS, info->normal) >> 8;
678 }
679 }
680 if (scancode==0 && asciicode==0) {
681 BX_INFO("KBD: int09h_handler(): scancode & asciicode are zero?\n");
682 }
683 enqueue_key(scancode, asciicode);
684 break;
685 }
686 if ((scancode & 0x7f) != 0x1d) {
687 mf2_state &= ~0x01;
688 }
689 mf2_state &= ~0x02;
690 SET_BDA(kbd_mode, mf2_state);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500691}
692
693// INT09h : Keyboard Hardware Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500694void VISIBLE16
Kevin O'Connored128492008-03-11 11:14:59 -0400695handle_09()
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500696{
Kevin O'Connored128492008-03-11 11:14:59 -0400697 //debug_isr();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500698
699 // disable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500700 outb(0xad, PORT_PS2_STATUS);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500701
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500702 outb(0x0b, PORT_PIC1);
703 if ((inb(PORT_PIC1) & 0x02) == 0)
704 goto done;
705
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500706 // read key from keyboard controller
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500707 u8 key = inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500708 irq_enable();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500709 if (CONFIG_KBD_CALL_INT15_4F) {
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500710 // allow for keyboard intercept
711 struct bregs tr;
712 memset(&tr, 0, sizeof(tr));
713 tr.al = key;
714 tr.ah = 0x4f;
715 tr.flags = F_CF;
716 call16_int(0x15, &tr);
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500717 if (!(tr.flags & F_CF))
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500718 goto done;
719 key = tr.al;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500720 }
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500721 process_key(key);
722
723 irq_disable();
724 eoi_master_pic();
725
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500726done:
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500727 // enable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500728 outb(0xae, PORT_PS2_STATUS);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500729}