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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{
Kevin O'Connorc2588692008-05-18 17:10:41 -040051 if (CONFIG_COREBOOT)
52 // Coreboot already does low-level keyboard init.
53 return;
54
Kevin O'Connor2018eff2008-03-12 21:27:02 -040055 /* ------------------- Flush buffers ------------------------*/
56 /* Wait until buffer is empty */
57 kbd_flush(0xff);
58
59 /* flush incoming keys */
60 u16 max=0x2000;
61 while (--max > 0) {
62 outb(0x00, PORT_DIAG);
63 if (inb(PORT_PS2_STATUS) & 0x01) {
64 inb(PORT_PS2_DATA);
65 max = 0x2000;
Kevin O'Connor2018eff2008-03-12 21:27:02 -040066 }
Kevin O'Connor06ad44e2008-04-05 19:30:02 -040067 }
Kevin O'Connor2018eff2008-03-12 21:27:02 -040068
69 // Due to timer issues, and if the IPS setting is > 15000000,
70 // the incoming keys might not be flushed here. That will
71 // cause a panic a few lines below. See sourceforge bug report :
72 // [ 642031 ] FATAL: Keyboard RESET error:993
73
74 /* ------------------- controller side ----------------------*/
75 /* send cmd = 0xAA, self test 8042 */
76 outb(0xaa, PORT_PS2_STATUS);
77
78 kbd_flush(0x00);
79 kbd_waitdata(0x01);
80
81 /* read self-test result, 0x55 should be returned from 0x60 */
82 if (inb(PORT_PS2_DATA) != 0x55)
83 keyboard_panic(991);
84
85 /* send cmd = 0xAB, keyboard interface test */
86 outb(0xab, PORT_PS2_STATUS);
87
88 kbd_flush(0x10);
89 kbd_waitdata(0x11);
90
91 /* read keyboard interface test result, */
92 /* 0x00 should be returned form 0x60 */
93 if (inb(PORT_PS2_DATA) != 0x00)
94 keyboard_panic(992);
95
96 /* Enable Keyboard clock */
97 outb(0xae, PORT_PS2_STATUS);
98 outb(0xa8, PORT_PS2_STATUS);
99
100 /* ------------------- keyboard side ------------------------*/
101 /* reset kerboard and self test (keyboard side) */
102 outb(0xff, PORT_PS2_DATA);
103
104 kbd_flush(0x20);
105 kbd_waitdata(0x21);
106
107 /* keyboard should return ACK */
108 if (inb(PORT_PS2_DATA) != 0xfa)
109 keyboard_panic(993);
110
111 kbd_waitdata(0x31);
112
113 if (inb(PORT_PS2_DATA) != 0xaa)
114 keyboard_panic(994);
115
116 /* Disable keyboard */
117 outb(0xf5, PORT_PS2_DATA);
118
119 kbd_flush(0x40);
120 kbd_waitdata(0x41);
121
122 /* keyboard should return ACK */
123 if (inb(PORT_PS2_DATA) != 0xfa)
124 keyboard_panic(995);
125
126 /* Write Keyboard Mode */
127 outb(0x60, PORT_PS2_STATUS);
128
129 kbd_flush(0x50);
130
131 /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
132 outb(0x61, PORT_PS2_DATA);
133
134 kbd_flush(0x60);
135
136 /* Enable keyboard */
137 outb(0xf4, PORT_PS2_DATA);
138
139 kbd_flush(0x70);
140 kbd_waitdata(0x71);
141
142 /* keyboard should return ACK */
143 if (inb(PORT_PS2_DATA) != 0xfa)
144 keyboard_panic(996);
145
146 outb(0x77, PORT_DIAG);
147}
148
149void
150kbd_setup()
151{
152 u16 x = offsetof(struct bios_data_area_s, kbd_buf) - 0x400;
153 SET_BDA(kbd_mode, 0x10);
154 SET_BDA(kbd_buf_head, x);
155 SET_BDA(kbd_buf_tail, x);
156 SET_BDA(kbd_buf_start_offset, x);
157
158 SET_BDA(kbd_buf_end_offset
159 , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
160
161 keyboard_init();
162}
163
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500164static u8
165enqueue_key(u8 scan_code, u8 ascii_code)
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500166{
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500167 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
168 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
169
170 u16 buffer_head = GET_BDA(kbd_buf_head);
171 u16 buffer_tail = GET_BDA(kbd_buf_tail);
172
173 u16 temp_tail = buffer_tail;
174 buffer_tail += 2;
175 if (buffer_tail >= buffer_end)
176 buffer_tail = buffer_start;
177
178 if (buffer_tail == buffer_head)
179 return 0;
180
Kevin O'Connor438f6352008-03-30 21:46:53 -0400181 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+0), ascii_code);
182 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0x400+1), scan_code);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500183 SET_BDA(kbd_buf_tail, buffer_tail);
184 return 1;
185}
186
187static u8
188dequeue_key(u8 *scan_code, u8 *ascii_code, u8 incr)
189{
190 u16 buffer_head;
191 u16 buffer_tail;
192 for (;;) {
193 buffer_head = GET_BDA(kbd_buf_head);
194 buffer_tail = GET_BDA(kbd_buf_tail);
195
196 if (buffer_head != buffer_tail)
197 break;
198 if (!incr)
199 return 0;
Kevin O'Connor06ad44e2008-04-05 19:30:02 -0400200 cpu_relax();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500201 }
202
Kevin O'Connor438f6352008-03-30 21:46:53 -0400203 *ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+0));
204 *scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0x400+1));
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500205
206 if (incr) {
207 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
208 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
209
210 buffer_head += 2;
211 if (buffer_head >= buffer_end)
212 buffer_head = buffer_start;
213 SET_BDA(kbd_buf_head, buffer_head);
214 }
215 return 1;
216}
217
218// read keyboard input
219static void
220handle_1600(struct bregs *regs)
221{
222 u8 scan_code, ascii_code;
223 dequeue_key(&scan_code, &ascii_code, 1);
224 if (scan_code != 0 && ascii_code == 0xF0)
225 ascii_code = 0;
226 else if (ascii_code == 0xE0)
227 ascii_code = 0;
228 regs->ax = (scan_code << 8) | ascii_code;
229}
230
231// check keyboard status
232static void
233handle_1601(struct bregs *regs)
234{
235 u8 scan_code, ascii_code;
236 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
237 regs->flags |= F_ZF;
238 return;
239 }
240 if (scan_code != 0 && ascii_code == 0xF0)
241 ascii_code = 0;
242 else if (ascii_code == 0xE0)
243 ascii_code = 0;
244 regs->ax = (scan_code << 8) | ascii_code;
245 regs->flags &= ~F_ZF;
246}
247
248// get shift flag status
249static void
250handle_1602(struct bregs *regs)
251{
252 regs->al = GET_BDA(kbd_flag0);
253}
254
255// store key-stroke into buffer
256static void
257handle_1605(struct bregs *regs)
258{
259 regs->al = !enqueue_key(regs->ch, regs->cl);
260}
261
262// GET KEYBOARD FUNCTIONALITY
263static void
264handle_1609(struct bregs *regs)
265{
266 // bit Bochs Description
267 // 7 0 reserved
268 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
269 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
270 // 4 1 INT 16/AH=0Ah supported
271 // 3 0 INT 16/AX=0306h supported
272 // 2 0 INT 16/AX=0305h supported
273 // 1 0 INT 16/AX=0304h supported
274 // 0 0 INT 16/AX=0300h supported
275 //
276 regs->al = 0x30;
277}
278
279// GET KEYBOARD ID
280static void
281handle_160a(struct bregs *regs)
282{
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500283 outb(0xf2, PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500284 /* Wait for data */
285 u16 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500286 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500287 outb(0x00, PORT_DIAG);
288 if (!max)
289 return;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500290 if (inb(PORT_PS2_DATA) != 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500291 regs->bx = 0;
292 return;
293 }
294 u16 kbd_code = 0;
295 u8 count = 2;
296 do {
297 max=0xffff;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500298 while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500299 outb(0x00, PORT_DIAG);
300 if (max>0x0) {
301 kbd_code >>= 8;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500302 kbd_code |= (inb(PORT_PS2_DATA) << 8);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500303 }
304 } while (--count>0);
305 regs->bx = kbd_code;
306}
307
308// read MF-II keyboard input
309static void
310handle_1610(struct bregs *regs)
311{
312 u8 scan_code, ascii_code;
313 dequeue_key(&scan_code, &ascii_code, 1);
314 if (scan_code != 0 && ascii_code == 0xF0)
315 ascii_code = 0;
316 regs->ax = (scan_code << 8) | ascii_code;
317}
318
319// check MF-II keyboard status
320static void
321handle_1611(struct bregs *regs)
322{
323 u8 scan_code, ascii_code;
324 if (!dequeue_key(&scan_code, &ascii_code, 0)) {
325 regs->flags |= F_ZF;
326 return;
327 }
328 if (scan_code != 0 && ascii_code == 0xF0)
329 ascii_code = 0;
330 regs->ax = (scan_code << 8) | ascii_code;
331 regs->flags &= ~F_ZF;
332}
333
334// get extended keyboard status
335static void
336handle_1612(struct bregs *regs)
337{
338 regs->al = GET_BDA(kbd_flag0);
339 regs->ah = (GET_BDA(kbd_flag1) & 0x73) | (GET_BDA(kbd_mode) & 0x0c);
340 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
341}
342
343static void
344handle_166f(struct bregs *regs)
345{
346 if (regs->al == 0x08)
347 // unsupported, aka normal keyboard
348 regs->ah = 2;
349}
350
351// keyboard capability check called by DOS 5.0+ keyb
352static void
353handle_1692(struct bregs *regs)
354{
355 // function int16 ah=0x10-0x12 supported
356 regs->ah = 0x80;
357}
358
359// 122 keys capability check called by DOS 5.0+ keyb
360static void
361handle_16a2(struct bregs *regs)
362{
363 // don't change AH : function int16 ah=0x20-0x22 NOT supported
364}
365
366static void
367set_leds()
368{
369 u8 shift_flags = GET_BDA(kbd_flag0);
370 u8 led_flags = GET_BDA(kbd_led);
371 if (((shift_flags >> 4) & 0x07) ^ ((led_flags & 0x07) == 0))
372 return;
373
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500374 outb(0xed, PORT_PS2_DATA);
375 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500376 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500377 if (inb(PORT_PS2_DATA) == 0xfa) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500378 led_flags &= 0xf8;
379 led_flags |= (shift_flags >> 4) & 0x07;
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500380 outb(led_flags & 0x07, PORT_PS2_DATA);
381 while ((inb(PORT_PS2_STATUS) & 0x01) == 0)
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500382 outb(0x21, PORT_DIAG);
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500383 inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500384 SET_BDA(kbd_led, led_flags);
385 }
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500386}
387
388// INT 16h Keyboard Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500389void VISIBLE16
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500390handle_16(struct bregs *regs)
391{
Kevin O'Connored128492008-03-11 11:14:59 -0400392 //debug_enter(regs);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500393
394 set_leds();
395
396 irq_enable();
397
398 switch (regs->ah) {
399 case 0x00: handle_1600(regs); break;
400 case 0x01: handle_1601(regs); break;
401 case 0x02: handle_1602(regs); break;
402 case 0x05: handle_1605(regs); break;
403 case 0x09: handle_1609(regs); break;
404 case 0x0a: handle_160a(regs); break;
405 case 0x10: handle_1610(regs); break;
406 case 0x11: handle_1611(regs); break;
407 case 0x12: handle_1612(regs); break;
408 case 0x92: handle_1692(regs); break;
409 case 0xa2: handle_16a2(regs); break;
410 case 0x6f: handle_166f(regs); break;
411 }
412}
413
414#define none 0
415#define MAX_SCAN_CODE 0x58
416
417static struct scaninfo {
418 u16 normal;
419 u16 shift;
420 u16 control;
421 u16 alt;
422 u8 lock_flags;
423} scan_to_scanascii[MAX_SCAN_CODE + 1] = {
424 { none, none, none, none, none },
425 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
426 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
427 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
428 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
429 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
430 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
431 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
432 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
433 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
434 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
435 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
436 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
437 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
438 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
439 { 0x0f09, 0x0f00, none, none, none }, /* tab */
440 { 0x1071, 0x1051, 0x1011, 0x1000, 0x40 }, /* Q */
441 { 0x1177, 0x1157, 0x1117, 0x1100, 0x40 }, /* W */
442 { 0x1265, 0x1245, 0x1205, 0x1200, 0x40 }, /* E */
443 { 0x1372, 0x1352, 0x1312, 0x1300, 0x40 }, /* R */
444 { 0x1474, 0x1454, 0x1414, 0x1400, 0x40 }, /* T */
445 { 0x1579, 0x1559, 0x1519, 0x1500, 0x40 }, /* Y */
446 { 0x1675, 0x1655, 0x1615, 0x1600, 0x40 }, /* U */
447 { 0x1769, 0x1749, 0x1709, 0x1700, 0x40 }, /* I */
448 { 0x186f, 0x184f, 0x180f, 0x1800, 0x40 }, /* O */
449 { 0x1970, 0x1950, 0x1910, 0x1900, 0x40 }, /* P */
450 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
451 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
452 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
453 { none, none, none, none, none }, /* L Ctrl */
454 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, 0x40 }, /* A */
455 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, 0x40 }, /* S */
456 { 0x2064, 0x2044, 0x2004, 0x2000, 0x40 }, /* D */
457 { 0x2166, 0x2146, 0x2106, 0x2100, 0x40 }, /* F */
458 { 0x2267, 0x2247, 0x2207, 0x2200, 0x40 }, /* G */
459 { 0x2368, 0x2348, 0x2308, 0x2300, 0x40 }, /* H */
460 { 0x246a, 0x244a, 0x240a, 0x2400, 0x40 }, /* J */
461 { 0x256b, 0x254b, 0x250b, 0x2500, 0x40 }, /* K */
462 { 0x266c, 0x264c, 0x260c, 0x2600, 0x40 }, /* L */
463 { 0x273b, 0x273a, none, none, none }, /* ;: */
464 { 0x2827, 0x2822, none, none, none }, /* '" */
465 { 0x2960, 0x297e, none, none, none }, /* `~ */
466 { none, none, none, none, none }, /* L shift */
467 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
468 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, 0x40 }, /* Z */
469 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, 0x40 }, /* X */
470 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, 0x40 }, /* C */
471 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, 0x40 }, /* V */
472 { 0x3062, 0x3042, 0x3002, 0x3000, 0x40 }, /* B */
473 { 0x316e, 0x314e, 0x310e, 0x3100, 0x40 }, /* N */
474 { 0x326d, 0x324d, 0x320d, 0x3200, 0x40 }, /* M */
475 { 0x332c, 0x333c, none, none, none }, /* ,< */
476 { 0x342e, 0x343e, none, none, none }, /* .> */
477 { 0x352f, 0x353f, none, none, none }, /* /? */
478 { none, none, none, none, none }, /* R Shift */
479 { 0x372a, 0x372a, none, none, none }, /* * */
480 { none, none, none, none, none }, /* L Alt */
481 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
482 { none, none, none, none, none }, /* caps lock */
483 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
484 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
485 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
486 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
487 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
488 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
489 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
490 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
491 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
492 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
493 { none, none, none, none, none }, /* Num Lock */
494 { none, none, none, none, none }, /* Scroll Lock */
495 { 0x4700, 0x4737, 0x7700, none, 0x20 }, /* 7 Home */
496 { 0x4800, 0x4838, none, none, 0x20 }, /* 8 UP */
497 { 0x4900, 0x4939, 0x8400, none, 0x20 }, /* 9 PgUp */
498 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
499 { 0x4b00, 0x4b34, 0x7300, none, 0x20 }, /* 4 Left */
500 { 0x4c00, 0x4c35, none, none, 0x20 }, /* 5 */
501 { 0x4d00, 0x4d36, 0x7400, none, 0x20 }, /* 6 Right */
502 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
503 { 0x4f00, 0x4f31, 0x7500, none, 0x20 }, /* 1 End */
504 { 0x5000, 0x5032, none, none, 0x20 }, /* 2 Down */
505 { 0x5100, 0x5133, 0x7600, none, 0x20 }, /* 3 PgDn */
506 { 0x5200, 0x5230, none, none, 0x20 }, /* 0 Ins */
507 { 0x5300, 0x532e, none, none, 0x20 }, /* Del */
508 { none, none, none, none, none },
509 { none, none, none, none, none },
510 { 0x565c, 0x567c, none, none, none }, /* \| */
511 { 0x5700, 0x5700, none, none, none }, /* F11 */
512 { 0x5800, 0x5800, none, none, none } /* F12 */
513};
514
515static void
516process_key(u8 scancode)
517{
518 u8 shift_flags = GET_BDA(kbd_flag0);
519 u8 mf2_flags = GET_BDA(kbd_flag1);
520 u8 mf2_state = GET_BDA(kbd_mode);
521
522 switch (scancode) {
523 case 0x00:
Kevin O'Connorac8df8c2008-05-24 23:46:33 -0400524 dprintf(1, "KBD: int09 handler: AL=0\n");
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500525 return;
526
527 case 0x3a: /* Caps Lock press */
528 shift_flags ^= 0x40;
529 SET_BDA(kbd_flag0, shift_flags);
530 mf2_flags |= 0x40;
531 SET_BDA(kbd_flag1, mf2_flags);
532 break;
533 case 0xba: /* Caps Lock release */
534 mf2_flags &= ~0x40;
535 SET_BDA(kbd_flag1, mf2_flags);
536 break;
537
538 case 0x2a: /* L Shift press */
539 shift_flags |= 0x02;
540 SET_BDA(kbd_flag0, shift_flags);
541 break;
542 case 0xaa: /* L Shift release */
543 shift_flags &= ~0x02;
544 SET_BDA(kbd_flag0, shift_flags);
545 break;
546
547 case 0x36: /* R Shift press */
548 shift_flags |= 0x01;
549 SET_BDA(kbd_flag0, shift_flags);
550 break;
551 case 0xb6: /* R Shift release */
552 shift_flags &= ~0x01;
553 SET_BDA(kbd_flag0, shift_flags);
554 break;
555
556 case 0x1d: /* Ctrl press */
557 if ((mf2_state & 0x01) == 0) {
558 shift_flags |= 0x04;
559 SET_BDA(kbd_flag0, shift_flags);
560 if (mf2_state & 0x02) {
561 mf2_state |= 0x04;
562 SET_BDA(kbd_mode, mf2_state);
563 } else {
564 mf2_flags |= 0x01;
565 SET_BDA(kbd_flag1, mf2_flags);
566 }
567 }
568 break;
569 case 0x9d: /* Ctrl release */
570 if ((mf2_state & 0x01) == 0) {
571 shift_flags &= ~0x04;
572 SET_BDA(kbd_flag0, shift_flags);
573 if (mf2_state & 0x02) {
574 mf2_state &= ~0x04;
575 SET_BDA(kbd_mode, mf2_state);
576 } else {
577 mf2_flags &= ~0x01;
578 SET_BDA(kbd_flag1, mf2_flags);
579 }
580 }
581 break;
582
583 case 0x38: /* Alt press */
584 shift_flags |= 0x08;
585 SET_BDA(kbd_flag0, shift_flags);
586 if (mf2_state & 0x02) {
587 mf2_state |= 0x08;
588 SET_BDA(kbd_mode, mf2_state);
589 } else {
590 mf2_flags |= 0x02;
591 SET_BDA(kbd_flag1, mf2_flags);
592 }
593 break;
594 case 0xb8: /* Alt release */
595 shift_flags &= ~0x08;
596 SET_BDA(kbd_flag0, shift_flags);
597 if (mf2_state & 0x02) {
598 mf2_state &= ~0x08;
599 SET_BDA(kbd_mode, mf2_state);
600 } else {
601 mf2_flags &= ~0x02;
602 SET_BDA(kbd_flag1, mf2_flags);
603 }
604 break;
605
606 case 0x45: /* Num Lock press */
607 if ((mf2_state & 0x03) == 0) {
608 mf2_flags |= 0x20;
609 SET_BDA(kbd_flag1, mf2_flags);
610 shift_flags ^= 0x20;
611 SET_BDA(kbd_flag0, shift_flags);
612 }
613 break;
614 case 0xc5: /* Num Lock release */
615 if ((mf2_state & 0x03) == 0) {
616 mf2_flags &= ~0x20;
617 SET_BDA(kbd_flag1, mf2_flags);
618 }
619 break;
620
621 case 0x46: /* Scroll Lock press */
622 mf2_flags |= 0x10;
623 SET_BDA(kbd_flag1, mf2_flags);
624 shift_flags ^= 0x10;
625 SET_BDA(kbd_flag0, shift_flags);
626 break;
627 case 0xc6: /* Scroll Lock release */
628 mf2_flags &= ~0x10;
629 SET_BDA(kbd_flag1, mf2_flags);
630 break;
631
632 case 0xe0:
633 // Extended key
634 SETBITS_BDA(kbd_mode, 0x02);
635 return;
636 case 0xe1:
637 // Pause key
638 SETBITS_BDA(kbd_mode, 0x01);
639 return;
640
641 default:
642 if (scancode & 0x80) {
643 break; /* toss key releases ... */
644 }
645 if (scancode > MAX_SCAN_CODE) {
Kevin O'Connorac8df8c2008-05-24 23:46:33 -0400646 dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n"
Kevin O'Connor438f6352008-03-30 21:46:53 -0400647 , scancode);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500648 return;
649 }
650 u8 asciicode;
651 struct scaninfo *info = &scan_to_scanascii[scancode];
652 if (shift_flags & 0x08) { /* ALT */
653 asciicode = GET_VAR(CS, info->alt);
654 scancode = GET_VAR(CS, info->alt) >> 8;
655 } else if (shift_flags & 0x04) { /* CONTROL */
656 asciicode = GET_VAR(CS, info->control);
657 scancode = GET_VAR(CS, info->control) >> 8;
Kevin O'Connor438f6352008-03-30 21:46:53 -0400658 } else if ((mf2_state & 0x02) > 0
659 && scancode >= 0x47 && scancode <= 0x53) {
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500660 /* extended keys handling */
661 asciicode = 0xe0;
662 scancode = GET_VAR(CS, info->normal) >> 8;
663 } else if (shift_flags & 0x03) { /* LSHIFT + RSHIFT */
664 /* check if lock state should be ignored
665 * because a SHIFT key are pressed */
666
667 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
668 asciicode = GET_VAR(CS, info->normal);
669 scancode = GET_VAR(CS, info->normal) >> 8;
670 } else {
671 asciicode = GET_VAR(CS, info->shift);
672 scancode = GET_VAR(CS, info->shift) >> 8;
673 }
674 } else {
675 /* check if lock is on */
676 if (shift_flags & GET_VAR(CS, info->lock_flags)) {
677 asciicode = GET_VAR(CS, info->shift);
678 scancode = GET_VAR(CS, info->shift) >> 8;
679 } else {
680 asciicode = GET_VAR(CS, info->normal);
681 scancode = GET_VAR(CS, info->normal) >> 8;
682 }
683 }
684 if (scancode==0 && asciicode==0) {
Kevin O'Connorac8df8c2008-05-24 23:46:33 -0400685 dprintf(1, "KBD: int09h_handler():"
686 " scancode & asciicode are zero?\n");
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500687 }
688 enqueue_key(scancode, asciicode);
689 break;
690 }
691 if ((scancode & 0x7f) != 0x1d) {
692 mf2_state &= ~0x01;
693 }
694 mf2_state &= ~0x02;
695 SET_BDA(kbd_mode, mf2_state);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500696}
697
698// INT09h : Keyboard Hardware Service Entry Point
Kevin O'Connor19786762008-03-05 21:09:59 -0500699void VISIBLE16
Kevin O'Connored128492008-03-11 11:14:59 -0400700handle_09()
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500701{
Kevin O'Connored128492008-03-11 11:14:59 -0400702 //debug_isr();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500703
704 // disable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500705 outb(0xad, PORT_PS2_STATUS);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500706
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500707 outb(0x0b, PORT_PIC1);
708 if ((inb(PORT_PIC1) & 0x02) == 0)
709 goto done;
710
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500711 // read key from keyboard controller
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500712 u8 key = inb(PORT_PS2_DATA);
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500713 irq_enable();
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500714 if (CONFIG_KBD_CALL_INT15_4F) {
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500715 // allow for keyboard intercept
716 struct bregs tr;
717 memset(&tr, 0, sizeof(tr));
718 tr.al = key;
719 tr.ah = 0x4f;
720 tr.flags = F_CF;
721 call16_int(0x15, &tr);
Kevin O'Connorc65a3802008-03-02 13:58:23 -0500722 if (!(tr.flags & F_CF))
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500723 goto done;
724 key = tr.al;
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500725 }
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500726 process_key(key);
727
728 irq_disable();
729 eoi_master_pic();
730
Kevin O'Connor38fcbfe2008-02-25 22:30:47 -0500731done:
Kevin O'Connor4b60c002008-02-25 22:29:55 -0500732 // enable keyboard
Kevin O'Connoree2fd7a2008-03-02 08:42:16 -0500733 outb(0xae, PORT_PS2_STATUS);
Kevin O'Connorf076a3e2008-02-25 22:25:15 -0500734}