1 // 16bit code to handle keyboard requests.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "biosvar.h" // GET_BDA
9 #include "util.h" // debug_enter
10 #include "config.h" // CONFIG_*
11 #include "bregs.h" // struct bregs
12 #include "ps2port.h" // kbd_command
14 // Bit definitions for BDA kbd_flag[012]
15 #define KF0_RSHIFT (1<<0)
16 #define KF0_LSHIFT (1<<1)
17 #define KF0_CTRLACTIVE (1<<2)
18 #define KF0_ALTACTIVE (1<<3)
19 #define KF0_SCROLLACTIVE (1<<4)
20 #define KF0_NUMACTIVE (1<<5)
21 #define KF0_CAPSACTIVE (1<<6)
23 #define KF1_LCTRL (1<<0)
24 #define KF1_LALT (1<<1)
25 #define KF1_PAUSEACTIVE (1<<3)
26 #define KF1_SCROLL (1<<4)
27 #define KF1_NUM (1<<5)
28 #define KF1_CAPS (1<<6)
30 #define KF2_LAST_E1 (1<<0)
31 #define KF2_LAST_E0 (1<<1)
32 #define KF2_RCTRL (1<<2)
33 #define KF2_RALT (1<<3)
34 #define KF2_101KBD (1<<4)
39 dprintf(3, "init keyboard\n");
40 u16 x = offsetof(struct bios_data_area_s, kbd_buf);
41 SET_BDA(kbd_flag2, KF2_101KBD);
42 SET_BDA(kbd_buf_head, x);
43 SET_BDA(kbd_buf_tail, x);
44 SET_BDA(kbd_buf_start_offset, x);
46 SET_BDA(kbd_buf_end_offset
47 , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
51 enqueue_key(u8 scan_code, u8 ascii_code)
53 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
54 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
56 u16 buffer_head = GET_BDA(kbd_buf_head);
57 u16 buffer_tail = GET_BDA(kbd_buf_tail);
59 u16 temp_tail = buffer_tail;
61 if (buffer_tail >= buffer_end)
62 buffer_tail = buffer_start;
64 if (buffer_tail == buffer_head)
67 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0), ascii_code);
68 SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+1), scan_code);
69 SET_BDA(kbd_buf_tail, buffer_tail);
74 dequeue_key(struct bregs *regs, int incr, int extended)
79 buffer_head = GET_BDA(kbd_buf_head);
80 buffer_tail = GET_BDA(kbd_buf_tail);
82 if (buffer_head != buffer_tail)
91 u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
92 u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
93 if ((ascii_code == 0xF0 && scan_code != 0)
94 || (ascii_code == 0xE0 && !extended))
96 regs->ax = (scan_code << 8) | ascii_code;
102 u16 buffer_start = GET_BDA(kbd_buf_start_offset);
103 u16 buffer_end = GET_BDA(kbd_buf_end_offset);
106 if (buffer_head >= buffer_end)
107 buffer_head = buffer_start;
108 SET_BDA(kbd_buf_head, buffer_head);
111 // read keyboard input
113 handle_1600(struct bregs *regs)
115 dequeue_key(regs, 1, 0);
118 // check keyboard status
120 handle_1601(struct bregs *regs)
122 dequeue_key(regs, 0, 0);
125 // get shift flag status
127 handle_1602(struct bregs *regs)
129 regs->al = GET_BDA(kbd_flag0);
132 // store key-stroke into buffer
134 handle_1605(struct bregs *regs)
136 regs->al = !enqueue_key(regs->ch, regs->cl);
139 // GET KEYBOARD FUNCTIONALITY
141 handle_1609(struct bregs *regs)
143 // bit Bochs Description
145 // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
146 // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
147 // 4 1 INT 16/AH=0Ah supported
148 // 3 0 INT 16/AX=0306h supported
149 // 2 0 INT 16/AX=0305h supported
150 // 1 0 INT 16/AX=0304h supported
151 // 0 0 INT 16/AX=0300h supported
158 handle_160a(struct bregs *regs)
161 int ret = kbd_command(ATKBD_CMD_GETID, param);
166 regs->bx = (param[1] << 8) | param[0];
169 // read MF-II keyboard input
171 handle_1610(struct bregs *regs)
173 dequeue_key(regs, 1, 1);
176 // check MF-II keyboard status
178 handle_1611(struct bregs *regs)
180 dequeue_key(regs, 0, 1);
183 // get extended keyboard status
185 handle_1612(struct bregs *regs)
187 regs->al = GET_BDA(kbd_flag0);
188 regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT))
189 | (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT)));
190 //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
194 handle_166f(struct bregs *regs)
196 if (regs->al == 0x08)
197 // unsupported, aka normal keyboard
201 // keyboard capability check called by DOS 5.0+ keyb
203 handle_1692(struct bregs *regs)
205 // function int16 ah=0x10-0x12 supported
209 // 122 keys capability check called by DOS 5.0+ keyb
211 handle_16a2(struct bregs *regs)
213 // don't change AH : function int16 ah=0x20-0x22 NOT supported
217 handle_16XX(struct bregs *regs)
219 warn_unimplemented(regs);
225 u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07;
226 u8 kbd_led = GET_BDA(kbd_led);
227 u8 led_flags = kbd_led & 0x07;
228 if (shift_flags == led_flags)
231 int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags);
235 kbd_led = (kbd_led & ~0x07) | shift_flags;
236 SET_BDA(kbd_led, kbd_led);
239 // INT 16h Keyboard Service Entry Point
241 handle_16(struct bregs *regs)
243 debug_enter(regs, DEBUG_HDL_16);
244 if (! CONFIG_KEYBOARD)
247 // XXX - set_leds should be called from irq handler
251 case 0x00: handle_1600(regs); break;
252 case 0x01: handle_1601(regs); break;
253 case 0x02: handle_1602(regs); break;
254 case 0x05: handle_1605(regs); break;
255 case 0x09: handle_1609(regs); break;
256 case 0x0a: handle_160a(regs); break;
257 case 0x10: handle_1610(regs); break;
258 case 0x11: handle_1611(regs); break;
259 case 0x12: handle_1612(regs); break;
260 case 0x92: handle_1692(regs); break;
261 case 0xa2: handle_16a2(regs); break;
262 case 0x6f: handle_166f(regs); break;
263 default: handle_16XX(regs); break;
268 #define MNUM KF0_NUMACTIVE
269 #define MCAP KF0_CAPSACTIVE
271 static struct scaninfo {
277 } scan_to_scanascii[] VAR16 = {
278 { none, none, none, none, none },
279 { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
280 { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
281 { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
282 { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
283 { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
284 { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
285 { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
286 { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
287 { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
288 { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
289 { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
290 { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
291 { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
292 { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
293 { 0x0f09, 0x0f00, none, none, none }, /* tab */
294 { 0x1071, 0x1051, 0x1011, 0x1000, MCAP }, /* Q */
295 { 0x1177, 0x1157, 0x1117, 0x1100, MCAP }, /* W */
296 { 0x1265, 0x1245, 0x1205, 0x1200, MCAP }, /* E */
297 { 0x1372, 0x1352, 0x1312, 0x1300, MCAP }, /* R */
298 { 0x1474, 0x1454, 0x1414, 0x1400, MCAP }, /* T */
299 { 0x1579, 0x1559, 0x1519, 0x1500, MCAP }, /* Y */
300 { 0x1675, 0x1655, 0x1615, 0x1600, MCAP }, /* U */
301 { 0x1769, 0x1749, 0x1709, 0x1700, MCAP }, /* I */
302 { 0x186f, 0x184f, 0x180f, 0x1800, MCAP }, /* O */
303 { 0x1970, 0x1950, 0x1910, 0x1900, MCAP }, /* P */
304 { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
305 { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
306 { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
307 { none, none, none, none, none }, /* L Ctrl */
308 { 0x1e61, 0x1e41, 0x1e01, 0x1e00, MCAP }, /* A */
309 { 0x1f73, 0x1f53, 0x1f13, 0x1f00, MCAP }, /* S */
310 { 0x2064, 0x2044, 0x2004, 0x2000, MCAP }, /* D */
311 { 0x2166, 0x2146, 0x2106, 0x2100, MCAP }, /* F */
312 { 0x2267, 0x2247, 0x2207, 0x2200, MCAP }, /* G */
313 { 0x2368, 0x2348, 0x2308, 0x2300, MCAP }, /* H */
314 { 0x246a, 0x244a, 0x240a, 0x2400, MCAP }, /* J */
315 { 0x256b, 0x254b, 0x250b, 0x2500, MCAP }, /* K */
316 { 0x266c, 0x264c, 0x260c, 0x2600, MCAP }, /* L */
317 { 0x273b, 0x273a, none, none, none }, /* ;: */
318 { 0x2827, 0x2822, none, none, none }, /* '" */
319 { 0x2960, 0x297e, none, none, none }, /* `~ */
320 { none, none, none, none, none }, /* L shift */
321 { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
322 { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, MCAP }, /* Z */
323 { 0x2d78, 0x2d58, 0x2d18, 0x2d00, MCAP }, /* X */
324 { 0x2e63, 0x2e43, 0x2e03, 0x2e00, MCAP }, /* C */
325 { 0x2f76, 0x2f56, 0x2f16, 0x2f00, MCAP }, /* V */
326 { 0x3062, 0x3042, 0x3002, 0x3000, MCAP }, /* B */
327 { 0x316e, 0x314e, 0x310e, 0x3100, MCAP }, /* N */
328 { 0x326d, 0x324d, 0x320d, 0x3200, MCAP }, /* M */
329 { 0x332c, 0x333c, none, none, none }, /* ,< */
330 { 0x342e, 0x343e, none, none, none }, /* .> */
331 { 0x352f, 0x353f, none, none, none }, /* /? */
332 { none, none, none, none, none }, /* R Shift */
333 { 0x372a, 0x372a, none, none, none }, /* * */
334 { none, none, none, none, none }, /* L Alt */
335 { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
336 { none, none, none, none, none }, /* caps lock */
337 { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
338 { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
339 { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
340 { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
341 { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
342 { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
343 { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
344 { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
345 { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
346 { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
347 { none, none, none, none, none }, /* Num Lock */
348 { none, none, none, none, none }, /* Scroll Lock */
349 { 0x4700, 0x4737, 0x7700, none, MNUM }, /* 7 Home */
350 { 0x4800, 0x4838, none, none, MNUM }, /* 8 UP */
351 { 0x4900, 0x4939, 0x8400, none, MNUM }, /* 9 PgUp */
352 { 0x4a2d, 0x4a2d, none, none, none }, /* - */
353 { 0x4b00, 0x4b34, 0x7300, none, MNUM }, /* 4 Left */
354 { 0x4c00, 0x4c35, none, none, MNUM }, /* 5 */
355 { 0x4d00, 0x4d36, 0x7400, none, MNUM }, /* 6 Right */
356 { 0x4e2b, 0x4e2b, none, none, none }, /* + */
357 { 0x4f00, 0x4f31, 0x7500, none, MNUM }, /* 1 End */
358 { 0x5000, 0x5032, none, none, MNUM }, /* 2 Down */
359 { 0x5100, 0x5133, 0x7600, none, MNUM }, /* 3 PgDn */
360 { 0x5200, 0x5230, none, none, MNUM }, /* 0 Ins */
361 { 0x5300, 0x532e, none, none, MNUM }, /* Del */
362 { none, none, none, none, none },
363 { none, none, none, none, none },
364 { 0x565c, 0x567c, none, none, none }, /* \| */
365 { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */
366 { 0x8600, 0x8800, 0x8a00, 0x8c00, none }, /* F12 */
369 // Handle a scancode read from the ps2 port. Note that "noinline" is
370 // used to make sure the call to call16_simpint in process_key doesn't
371 // have the overhead of this function's stack.
373 __process_key(u8 scancode)
375 u8 flags0 = GET_BDA(kbd_flag0);
376 u8 flags1 = GET_BDA(kbd_flag1);
377 u8 flags2 = GET_BDA(kbd_flag2);
379 if (flags2 & KF2_LAST_E1) {
380 // Part of "pause" key (sequence is e1 1d 45 e1 9d c5)
381 if ((scancode & ~0x80) == 0x1d)
382 // Second key of sequence
384 // Third key of sequence - clear flag.
385 flags2 &= ~KF2_LAST_E1;
386 SET_BDA(kbd_flag2, flags2);
388 if (scancode == 0xc5) {
389 // Final key in sequence.
391 // XXX - do actual pause.
396 // XXX - PrtScr should cause int 0x05
397 // XXX - Ctrl+Break should cause int 0x1B
398 // XXX - SysReq should cause int 0x15/0x85
402 dprintf(1, "KBD: int09 handler: AL=0\n");
405 case 0x3a: /* Caps Lock press */
406 flags0 ^= KF0_CAPSACTIVE;
409 case 0xba: /* Caps Lock release */
413 case 0x2a: /* L Shift press */
414 flags0 |= KF0_LSHIFT;
416 case 0xaa: /* L Shift release */
417 flags0 &= ~KF0_LSHIFT;
420 case 0x36: /* R Shift press */
421 flags0 |= KF0_RSHIFT;
423 case 0xb6: /* R Shift release */
424 flags0 &= ~KF0_RSHIFT;
427 case 0x1d: /* Ctrl press */
428 flags0 |= KF0_CTRLACTIVE;
429 if (flags2 & KF2_LAST_E0)
434 case 0x9d: /* Ctrl release */
435 flags0 &= ~KF0_CTRLACTIVE;
436 if (flags2 & KF2_LAST_E0)
437 flags2 &= ~KF2_RCTRL;
439 flags1 &= ~KF1_LCTRL;
442 case 0x38: /* Alt press */
443 flags0 |= KF0_ALTACTIVE;
444 if (flags2 & KF2_LAST_E0)
449 case 0xb8: /* Alt release */
450 flags0 &= ~KF0_ALTACTIVE;
451 if (flags2 & KF2_LAST_E0)
457 case 0x45: /* Num Lock press */
459 flags0 ^= KF0_NUMACTIVE;
461 case 0xc5: /* Num Lock release */
465 case 0x46: /* Scroll Lock press */
466 flags1 |= KF1_SCROLL;
467 flags0 ^= KF0_SCROLLACTIVE;
469 case 0xc6: /* Scroll Lock release */
470 flags1 &= ~KF1_SCROLL;
475 flags2 |= KF2_LAST_E0;
476 SET_BDA(kbd_flag2, flags2);
479 // Start of pause key sequence
480 flags2 |= KF2_LAST_E1;
488 && ((flags0 & (KF0_CTRLACTIVE|KF0_ALTACTIVE))
489 == (KF0_CTRLACTIVE|KF0_ALTACTIVE))) {
490 // Ctrl+alt+del - reset machine.
491 SET_BDA(soft_reset_flag, 0x1234);
494 if (scancode >= ARRAY_SIZE(scan_to_scanascii)) {
495 dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n"
500 struct scaninfo *info = &scan_to_scanascii[scancode];
501 if (flags0 & KF0_ALTACTIVE) {
502 asciicode = GET_GLOBAL(info->alt);
503 scancode = GET_GLOBAL(info->alt) >> 8;
504 } else if (flags0 & KF0_CTRLACTIVE) {
505 asciicode = GET_GLOBAL(info->control);
506 scancode = GET_GLOBAL(info->control) >> 8;
507 } else if (flags2 & KF2_LAST_E0
508 && scancode >= 0x47 && scancode <= 0x53) {
509 /* extended keys handling */
511 scancode = GET_GLOBAL(info->normal) >> 8;
512 } else if (flags0 & (KF0_RSHIFT|KF0_LSHIFT)) {
513 /* check if lock state should be ignored because a SHIFT
516 if (flags0 & GET_GLOBAL(info->lock_flags)) {
517 asciicode = GET_GLOBAL(info->normal);
518 scancode = GET_GLOBAL(info->normal) >> 8;
520 asciicode = GET_GLOBAL(info->shift);
521 scancode = GET_GLOBAL(info->shift) >> 8;
524 /* check if lock is on */
525 if (flags0 & GET_GLOBAL(info->lock_flags)) {
526 asciicode = GET_GLOBAL(info->shift);
527 scancode = GET_GLOBAL(info->shift) >> 8;
529 asciicode = GET_GLOBAL(info->normal);
530 scancode = GET_GLOBAL(info->normal) >> 8;
533 if (scancode==0 && asciicode==0)
534 dprintf(1, "KBD: scancode & asciicode are zero?\n");
535 enqueue_key(scancode, asciicode);
538 flags2 &= ~KF2_LAST_E0;
540 SET_BDA(kbd_flag0, flags0);
541 SET_BDA(kbd_flag1, flags1);
542 SET_BDA(kbd_flag2, flags2);
548 if (!CONFIG_KEYBOARD)
551 if (CONFIG_KBD_CALL_INT15_4F) {
552 // allow for keyboard intercept
553 u32 eax = (0x4f << 8) | key;
555 call16_simpint(0x15, &eax, &flags);