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1.1 root 1: // 16bit code to handle keyboard requests.
2: //
3: // Copyright (C) 2008 Kevin O'Connor <[email protected]>
4: // Copyright (C) 2002 MandrakeSoft S.A.
5: //
6: // This file may be distributed under the terms of the GNU LGPLv3 license.
7:
8: #include "biosvar.h" // GET_BDA
9: #include "util.h" // debug_enter
10: #include "config.h" // CONFIG_*
11: #include "bregs.h" // struct bregs
1.1.1.3 ! root 12: #include "ps2port.h" // ps2_kbd_command
! 13: #include "usb-hid.h" // usb_kbd_command
1.1 root 14:
15: // Bit definitions for BDA kbd_flag[012]
16: #define KF0_RSHIFT (1<<0)
17: #define KF0_LSHIFT (1<<1)
18: #define KF0_CTRLACTIVE (1<<2)
19: #define KF0_ALTACTIVE (1<<3)
20: #define KF0_SCROLLACTIVE (1<<4)
21: #define KF0_NUMACTIVE (1<<5)
22: #define KF0_CAPSACTIVE (1<<6)
23:
24: #define KF1_LCTRL (1<<0)
25: #define KF1_LALT (1<<1)
26: #define KF1_PAUSEACTIVE (1<<3)
27: #define KF1_SCROLL (1<<4)
28: #define KF1_NUM (1<<5)
29: #define KF1_CAPS (1<<6)
30:
31: #define KF2_LAST_E1 (1<<0)
32: #define KF2_LAST_E0 (1<<1)
33: #define KF2_RCTRL (1<<2)
34: #define KF2_RALT (1<<3)
35: #define KF2_101KBD (1<<4)
36:
37: void
1.1.1.2 root 38: kbd_setup(void)
1.1 root 39: {
40: dprintf(3, "init keyboard\n");
41: u16 x = offsetof(struct bios_data_area_s, kbd_buf);
42: SET_BDA(kbd_flag2, KF2_101KBD);
43: SET_BDA(kbd_buf_head, x);
44: SET_BDA(kbd_buf_tail, x);
45: SET_BDA(kbd_buf_start_offset, x);
46:
47: SET_BDA(kbd_buf_end_offset
48: , x + FIELD_SIZEOF(struct bios_data_area_s, kbd_buf));
49: }
50:
51: static u8
52: enqueue_key(u8 scan_code, u8 ascii_code)
53: {
54: u16 buffer_start = GET_BDA(kbd_buf_start_offset);
55: u16 buffer_end = GET_BDA(kbd_buf_end_offset);
56:
57: u16 buffer_head = GET_BDA(kbd_buf_head);
58: u16 buffer_tail = GET_BDA(kbd_buf_tail);
59:
60: u16 temp_tail = buffer_tail;
61: buffer_tail += 2;
62: if (buffer_tail >= buffer_end)
63: buffer_tail = buffer_start;
64:
65: if (buffer_tail == buffer_head)
66: return 0;
67:
68: SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+0), ascii_code);
69: SET_FARVAR(SEG_BDA, *(u8*)(temp_tail+1), scan_code);
70: SET_BDA(kbd_buf_tail, buffer_tail);
71: return 1;
72: }
73:
74: static void
75: dequeue_key(struct bregs *regs, int incr, int extended)
76: {
1.1.1.3 ! root 77: yield();
1.1 root 78: u16 buffer_head;
79: u16 buffer_tail;
80: for (;;) {
81: buffer_head = GET_BDA(kbd_buf_head);
82: buffer_tail = GET_BDA(kbd_buf_tail);
83:
84: if (buffer_head != buffer_tail)
85: break;
86: if (!incr) {
87: regs->flags |= F_ZF;
88: return;
89: }
90: wait_irq();
91: }
92:
93: u8 ascii_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+0));
94: u8 scan_code = GET_FARVAR(SEG_BDA, *(u8*)(buffer_head+1));
95: if ((ascii_code == 0xF0 && scan_code != 0)
96: || (ascii_code == 0xE0 && !extended))
97: ascii_code = 0;
98: regs->ax = (scan_code << 8) | ascii_code;
99:
100: if (!incr) {
101: regs->flags &= ~F_ZF;
102: return;
103: }
104: u16 buffer_start = GET_BDA(kbd_buf_start_offset);
105: u16 buffer_end = GET_BDA(kbd_buf_end_offset);
106:
107: buffer_head += 2;
108: if (buffer_head >= buffer_end)
109: buffer_head = buffer_start;
110: SET_BDA(kbd_buf_head, buffer_head);
111: }
112:
1.1.1.3 ! root 113: static inline int
! 114: kbd_command(int command, u8 *param)
! 115: {
! 116: if (usb_kbd_active())
! 117: return usb_kbd_command(command, param);
! 118: return ps2_kbd_command(command, param);
! 119: }
! 120:
1.1 root 121: // read keyboard input
122: static void
123: handle_1600(struct bregs *regs)
124: {
125: dequeue_key(regs, 1, 0);
126: }
127:
128: // check keyboard status
129: static void
130: handle_1601(struct bregs *regs)
131: {
132: dequeue_key(regs, 0, 0);
133: }
134:
135: // get shift flag status
136: static void
137: handle_1602(struct bregs *regs)
138: {
1.1.1.3 ! root 139: yield();
1.1 root 140: regs->al = GET_BDA(kbd_flag0);
141: }
142:
143: // store key-stroke into buffer
144: static void
145: handle_1605(struct bregs *regs)
146: {
147: regs->al = !enqueue_key(regs->ch, regs->cl);
148: }
149:
150: // GET KEYBOARD FUNCTIONALITY
151: static void
152: handle_1609(struct bregs *regs)
153: {
154: // bit Bochs Description
155: // 7 0 reserved
156: // 6 0 INT 16/AH=20h-22h supported (122-key keyboard support)
157: // 5 1 INT 16/AH=10h-12h supported (enhanced keyboard support)
158: // 4 1 INT 16/AH=0Ah supported
159: // 3 0 INT 16/AX=0306h supported
160: // 2 0 INT 16/AX=0305h supported
161: // 1 0 INT 16/AX=0304h supported
162: // 0 0 INT 16/AX=0300h supported
163: //
164: regs->al = 0x30;
165: }
166:
167: // GET KEYBOARD ID
168: static void
169: handle_160a(struct bregs *regs)
170: {
171: u8 param[2];
172: int ret = kbd_command(ATKBD_CMD_GETID, param);
173: if (ret) {
174: regs->bx = 0;
175: return;
176: }
177: regs->bx = (param[1] << 8) | param[0];
178: }
179:
180: // read MF-II keyboard input
181: static void
182: handle_1610(struct bregs *regs)
183: {
184: dequeue_key(regs, 1, 1);
185: }
186:
187: // check MF-II keyboard status
188: static void
189: handle_1611(struct bregs *regs)
190: {
191: dequeue_key(regs, 0, 1);
192: }
193:
194: // get extended keyboard status
195: static void
196: handle_1612(struct bregs *regs)
197: {
1.1.1.3 ! root 198: yield();
1.1 root 199: regs->al = GET_BDA(kbd_flag0);
200: regs->ah = ((GET_BDA(kbd_flag1) & ~(KF2_RCTRL|KF2_RALT))
201: | (GET_BDA(kbd_flag2) & (KF2_RCTRL|KF2_RALT)));
202: //BX_DEBUG_INT16("int16: func 12 sending %04x\n",AX);
203: }
204:
205: static void
206: handle_166f(struct bregs *regs)
207: {
208: if (regs->al == 0x08)
209: // unsupported, aka normal keyboard
210: regs->ah = 2;
211: }
212:
213: // keyboard capability check called by DOS 5.0+ keyb
214: static void
215: handle_1692(struct bregs *regs)
216: {
217: // function int16 ah=0x10-0x12 supported
218: regs->ah = 0x80;
219: }
220:
221: // 122 keys capability check called by DOS 5.0+ keyb
222: static void
223: handle_16a2(struct bregs *regs)
224: {
225: // don't change AH : function int16 ah=0x20-0x22 NOT supported
226: }
227:
228: static void
229: handle_16XX(struct bregs *regs)
230: {
231: warn_unimplemented(regs);
232: }
233:
234: static void
1.1.1.2 root 235: set_leds(void)
1.1 root 236: {
237: u8 shift_flags = (GET_BDA(kbd_flag0) >> 4) & 0x07;
238: u8 kbd_led = GET_BDA(kbd_led);
239: u8 led_flags = kbd_led & 0x07;
240: if (shift_flags == led_flags)
241: return;
242:
243: int ret = kbd_command(ATKBD_CMD_SETLEDS, &shift_flags);
244: if (ret)
245: // Error
246: return;
247: kbd_led = (kbd_led & ~0x07) | shift_flags;
248: SET_BDA(kbd_led, kbd_led);
249: }
250:
251: // INT 16h Keyboard Service Entry Point
252: void VISIBLE16
253: handle_16(struct bregs *regs)
254: {
255: debug_enter(regs, DEBUG_HDL_16);
256: if (! CONFIG_KEYBOARD)
257: return;
258:
259: // XXX - set_leds should be called from irq handler
260: set_leds();
261:
262: switch (regs->ah) {
263: case 0x00: handle_1600(regs); break;
264: case 0x01: handle_1601(regs); break;
265: case 0x02: handle_1602(regs); break;
266: case 0x05: handle_1605(regs); break;
267: case 0x09: handle_1609(regs); break;
268: case 0x0a: handle_160a(regs); break;
269: case 0x10: handle_1610(regs); break;
270: case 0x11: handle_1611(regs); break;
271: case 0x12: handle_1612(regs); break;
272: case 0x92: handle_1692(regs); break;
273: case 0xa2: handle_16a2(regs); break;
274: case 0x6f: handle_166f(regs); break;
275: default: handle_16XX(regs); break;
276: }
277: }
278:
279: #define none 0
280: #define MNUM KF0_NUMACTIVE
281: #define MCAP KF0_CAPSACTIVE
282:
283: static struct scaninfo {
284: u16 normal;
285: u16 shift;
286: u16 control;
287: u16 alt;
288: u8 lock_flags;
289: } scan_to_scanascii[] VAR16 = {
290: { none, none, none, none, none },
291: { 0x011b, 0x011b, 0x011b, 0x0100, none }, /* escape */
292: { 0x0231, 0x0221, none, 0x7800, none }, /* 1! */
293: { 0x0332, 0x0340, 0x0300, 0x7900, none }, /* 2@ */
294: { 0x0433, 0x0423, none, 0x7a00, none }, /* 3# */
295: { 0x0534, 0x0524, none, 0x7b00, none }, /* 4$ */
296: { 0x0635, 0x0625, none, 0x7c00, none }, /* 5% */
297: { 0x0736, 0x075e, 0x071e, 0x7d00, none }, /* 6^ */
298: { 0x0837, 0x0826, none, 0x7e00, none }, /* 7& */
299: { 0x0938, 0x092a, none, 0x7f00, none }, /* 8* */
300: { 0x0a39, 0x0a28, none, 0x8000, none }, /* 9( */
301: { 0x0b30, 0x0b29, none, 0x8100, none }, /* 0) */
302: { 0x0c2d, 0x0c5f, 0x0c1f, 0x8200, none }, /* -_ */
303: { 0x0d3d, 0x0d2b, none, 0x8300, none }, /* =+ */
304: { 0x0e08, 0x0e08, 0x0e7f, none, none }, /* backspace */
305: { 0x0f09, 0x0f00, none, none, none }, /* tab */
306: { 0x1071, 0x1051, 0x1011, 0x1000, MCAP }, /* Q */
307: { 0x1177, 0x1157, 0x1117, 0x1100, MCAP }, /* W */
308: { 0x1265, 0x1245, 0x1205, 0x1200, MCAP }, /* E */
309: { 0x1372, 0x1352, 0x1312, 0x1300, MCAP }, /* R */
310: { 0x1474, 0x1454, 0x1414, 0x1400, MCAP }, /* T */
311: { 0x1579, 0x1559, 0x1519, 0x1500, MCAP }, /* Y */
312: { 0x1675, 0x1655, 0x1615, 0x1600, MCAP }, /* U */
313: { 0x1769, 0x1749, 0x1709, 0x1700, MCAP }, /* I */
314: { 0x186f, 0x184f, 0x180f, 0x1800, MCAP }, /* O */
315: { 0x1970, 0x1950, 0x1910, 0x1900, MCAP }, /* P */
316: { 0x1a5b, 0x1a7b, 0x1a1b, none, none }, /* [{ */
317: { 0x1b5d, 0x1b7d, 0x1b1d, none, none }, /* ]} */
318: { 0x1c0d, 0x1c0d, 0x1c0a, none, none }, /* Enter */
319: { none, none, none, none, none }, /* L Ctrl */
320: { 0x1e61, 0x1e41, 0x1e01, 0x1e00, MCAP }, /* A */
321: { 0x1f73, 0x1f53, 0x1f13, 0x1f00, MCAP }, /* S */
322: { 0x2064, 0x2044, 0x2004, 0x2000, MCAP }, /* D */
323: { 0x2166, 0x2146, 0x2106, 0x2100, MCAP }, /* F */
324: { 0x2267, 0x2247, 0x2207, 0x2200, MCAP }, /* G */
325: { 0x2368, 0x2348, 0x2308, 0x2300, MCAP }, /* H */
326: { 0x246a, 0x244a, 0x240a, 0x2400, MCAP }, /* J */
327: { 0x256b, 0x254b, 0x250b, 0x2500, MCAP }, /* K */
328: { 0x266c, 0x264c, 0x260c, 0x2600, MCAP }, /* L */
329: { 0x273b, 0x273a, none, none, none }, /* ;: */
330: { 0x2827, 0x2822, none, none, none }, /* '" */
331: { 0x2960, 0x297e, none, none, none }, /* `~ */
332: { none, none, none, none, none }, /* L shift */
333: { 0x2b5c, 0x2b7c, 0x2b1c, none, none }, /* |\ */
334: { 0x2c7a, 0x2c5a, 0x2c1a, 0x2c00, MCAP }, /* Z */
335: { 0x2d78, 0x2d58, 0x2d18, 0x2d00, MCAP }, /* X */
336: { 0x2e63, 0x2e43, 0x2e03, 0x2e00, MCAP }, /* C */
337: { 0x2f76, 0x2f56, 0x2f16, 0x2f00, MCAP }, /* V */
338: { 0x3062, 0x3042, 0x3002, 0x3000, MCAP }, /* B */
339: { 0x316e, 0x314e, 0x310e, 0x3100, MCAP }, /* N */
340: { 0x326d, 0x324d, 0x320d, 0x3200, MCAP }, /* M */
341: { 0x332c, 0x333c, none, none, none }, /* ,< */
342: { 0x342e, 0x343e, none, none, none }, /* .> */
343: { 0x352f, 0x353f, none, none, none }, /* /? */
344: { none, none, none, none, none }, /* R Shift */
345: { 0x372a, 0x372a, none, none, none }, /* * */
346: { none, none, none, none, none }, /* L Alt */
347: { 0x3920, 0x3920, 0x3920, 0x3920, none }, /* space */
348: { none, none, none, none, none }, /* caps lock */
349: { 0x3b00, 0x5400, 0x5e00, 0x6800, none }, /* F1 */
350: { 0x3c00, 0x5500, 0x5f00, 0x6900, none }, /* F2 */
351: { 0x3d00, 0x5600, 0x6000, 0x6a00, none }, /* F3 */
352: { 0x3e00, 0x5700, 0x6100, 0x6b00, none }, /* F4 */
353: { 0x3f00, 0x5800, 0x6200, 0x6c00, none }, /* F5 */
354: { 0x4000, 0x5900, 0x6300, 0x6d00, none }, /* F6 */
355: { 0x4100, 0x5a00, 0x6400, 0x6e00, none }, /* F7 */
356: { 0x4200, 0x5b00, 0x6500, 0x6f00, none }, /* F8 */
357: { 0x4300, 0x5c00, 0x6600, 0x7000, none }, /* F9 */
358: { 0x4400, 0x5d00, 0x6700, 0x7100, none }, /* F10 */
359: { none, none, none, none, none }, /* Num Lock */
360: { none, none, none, none, none }, /* Scroll Lock */
361: { 0x4700, 0x4737, 0x7700, none, MNUM }, /* 7 Home */
362: { 0x4800, 0x4838, none, none, MNUM }, /* 8 UP */
363: { 0x4900, 0x4939, 0x8400, none, MNUM }, /* 9 PgUp */
364: { 0x4a2d, 0x4a2d, none, none, none }, /* - */
365: { 0x4b00, 0x4b34, 0x7300, none, MNUM }, /* 4 Left */
366: { 0x4c00, 0x4c35, none, none, MNUM }, /* 5 */
367: { 0x4d00, 0x4d36, 0x7400, none, MNUM }, /* 6 Right */
368: { 0x4e2b, 0x4e2b, none, none, none }, /* + */
369: { 0x4f00, 0x4f31, 0x7500, none, MNUM }, /* 1 End */
370: { 0x5000, 0x5032, none, none, MNUM }, /* 2 Down */
371: { 0x5100, 0x5133, 0x7600, none, MNUM }, /* 3 PgDn */
372: { 0x5200, 0x5230, none, none, MNUM }, /* 0 Ins */
373: { 0x5300, 0x532e, none, none, MNUM }, /* Del */
374: { none, none, none, none, none },
375: { none, none, none, none, none },
376: { 0x565c, 0x567c, none, none, none }, /* \| */
377: { 0x8500, 0x8700, 0x8900, 0x8b00, none }, /* F11 */
378: { 0x8600, 0x8800, 0x8a00, 0x8c00, none }, /* F12 */
379: };
380:
381: // Handle a scancode read from the ps2 port. Note that "noinline" is
382: // used to make sure the call to call16_simpint in process_key doesn't
383: // have the overhead of this function's stack.
384: static void noinline
385: __process_key(u8 scancode)
386: {
387: u8 flags0 = GET_BDA(kbd_flag0);
388: u8 flags1 = GET_BDA(kbd_flag1);
389: u8 flags2 = GET_BDA(kbd_flag2);
390:
391: if (flags2 & KF2_LAST_E1) {
392: // Part of "pause" key (sequence is e1 1d 45 e1 9d c5)
393: if ((scancode & ~0x80) == 0x1d)
394: // Second key of sequence
395: return;
396: // Third key of sequence - clear flag.
397: flags2 &= ~KF2_LAST_E1;
398: SET_BDA(kbd_flag2, flags2);
399:
400: if (scancode == 0xc5) {
401: // Final key in sequence.
402:
403: // XXX - do actual pause.
404: }
405: return;
406: }
407:
408: // XXX - PrtScr should cause int 0x05
409: // XXX - Ctrl+Break should cause int 0x1B
410: // XXX - SysReq should cause int 0x15/0x85
411:
412: switch (scancode) {
413: case 0x00:
414: dprintf(1, "KBD: int09 handler: AL=0\n");
415: return;
416:
417: case 0x3a: /* Caps Lock press */
418: flags0 ^= KF0_CAPSACTIVE;
419: flags1 |= KF1_CAPS;
420: break;
421: case 0xba: /* Caps Lock release */
422: flags1 &= ~KF1_CAPS;
423: break;
424:
425: case 0x2a: /* L Shift press */
426: flags0 |= KF0_LSHIFT;
427: break;
428: case 0xaa: /* L Shift release */
429: flags0 &= ~KF0_LSHIFT;
430: break;
431:
432: case 0x36: /* R Shift press */
433: flags0 |= KF0_RSHIFT;
434: break;
435: case 0xb6: /* R Shift release */
436: flags0 &= ~KF0_RSHIFT;
437: break;
438:
439: case 0x1d: /* Ctrl press */
440: flags0 |= KF0_CTRLACTIVE;
441: if (flags2 & KF2_LAST_E0)
442: flags2 |= KF2_RCTRL;
443: else
444: flags1 |= KF1_LCTRL;
445: break;
446: case 0x9d: /* Ctrl release */
447: flags0 &= ~KF0_CTRLACTIVE;
448: if (flags2 & KF2_LAST_E0)
449: flags2 &= ~KF2_RCTRL;
450: else
451: flags1 &= ~KF1_LCTRL;
452: break;
453:
454: case 0x38: /* Alt press */
455: flags0 |= KF0_ALTACTIVE;
456: if (flags2 & KF2_LAST_E0)
457: flags2 |= KF2_RALT;
458: else
459: flags1 |= KF1_LALT;
460: break;
461: case 0xb8: /* Alt release */
462: flags0 &= ~KF0_ALTACTIVE;
463: if (flags2 & KF2_LAST_E0)
464: flags2 &= ~KF2_RALT;
465: else
466: flags1 &= ~KF1_LALT;
467: break;
468:
469: case 0x45: /* Num Lock press */
470: flags1 |= KF1_NUM;
471: flags0 ^= KF0_NUMACTIVE;
472: break;
473: case 0xc5: /* Num Lock release */
474: flags1 &= ~KF1_NUM;
475: break;
476:
477: case 0x46: /* Scroll Lock press */
478: flags1 |= KF1_SCROLL;
479: flags0 ^= KF0_SCROLLACTIVE;
480: break;
481: case 0xc6: /* Scroll Lock release */
482: flags1 &= ~KF1_SCROLL;
483: break;
484:
485: case 0xe0:
486: // Extended key
487: flags2 |= KF2_LAST_E0;
488: SET_BDA(kbd_flag2, flags2);
489: return;
490: case 0xe1:
491: // Start of pause key sequence
492: flags2 |= KF2_LAST_E1;
493: break;
494:
495: default:
496: if (scancode & 0x80)
497: // toss key releases
498: break;
499: if (scancode == 0x53
500: && ((flags0 & (KF0_CTRLACTIVE|KF0_ALTACTIVE))
501: == (KF0_CTRLACTIVE|KF0_ALTACTIVE))) {
502: // Ctrl+alt+del - reset machine.
503: SET_BDA(soft_reset_flag, 0x1234);
504: reset_vector();
505: }
506: if (scancode >= ARRAY_SIZE(scan_to_scanascii)) {
507: dprintf(1, "KBD: int09h_handler(): unknown scancode read: 0x%02x!\n"
508: , scancode);
509: return;
510: }
511: u8 asciicode;
512: struct scaninfo *info = &scan_to_scanascii[scancode];
513: if (flags0 & KF0_ALTACTIVE) {
514: asciicode = GET_GLOBAL(info->alt);
515: scancode = GET_GLOBAL(info->alt) >> 8;
516: } else if (flags0 & KF0_CTRLACTIVE) {
517: asciicode = GET_GLOBAL(info->control);
518: scancode = GET_GLOBAL(info->control) >> 8;
519: } else if (flags2 & KF2_LAST_E0
520: && scancode >= 0x47 && scancode <= 0x53) {
521: /* extended keys handling */
522: asciicode = 0xe0;
523: scancode = GET_GLOBAL(info->normal) >> 8;
524: } else if (flags0 & (KF0_RSHIFT|KF0_LSHIFT)) {
525: /* check if lock state should be ignored because a SHIFT
526: * key is pressed */
527:
528: if (flags0 & GET_GLOBAL(info->lock_flags)) {
529: asciicode = GET_GLOBAL(info->normal);
530: scancode = GET_GLOBAL(info->normal) >> 8;
531: } else {
532: asciicode = GET_GLOBAL(info->shift);
533: scancode = GET_GLOBAL(info->shift) >> 8;
534: }
535: } else {
536: /* check if lock is on */
537: if (flags0 & GET_GLOBAL(info->lock_flags)) {
538: asciicode = GET_GLOBAL(info->shift);
539: scancode = GET_GLOBAL(info->shift) >> 8;
540: } else {
541: asciicode = GET_GLOBAL(info->normal);
542: scancode = GET_GLOBAL(info->normal) >> 8;
543: }
544: }
545: if (scancode==0 && asciicode==0)
546: dprintf(1, "KBD: scancode & asciicode are zero?\n");
547: enqueue_key(scancode, asciicode);
548: break;
549: }
550: flags2 &= ~KF2_LAST_E0;
551:
552: SET_BDA(kbd_flag0, flags0);
553: SET_BDA(kbd_flag1, flags1);
554: SET_BDA(kbd_flag2, flags2);
555: }
556:
557: void
558: process_key(u8 key)
559: {
560: if (!CONFIG_KEYBOARD)
561: return;
562:
563: if (CONFIG_KBD_CALL_INT15_4F) {
564: // allow for keyboard intercept
565: u32 eax = (0x4f << 8) | key;
566: u32 flags;
567: call16_simpint(0x15, &eax, &flags);
568: if (!(flags & F_CF))
569: return;
570: key = eax;
571: }
572: __process_key(key);
573: }
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