2 Copyright 2019 Jun Wako <wakojun@gmail.com>
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
29 #include "ibmpc_usb.h"
32 static void matrix_make(uint8_t code);
33 static void matrix_break(uint8_t code);
35 static int8_t process_cs1(void);
36 static int8_t process_cs2(void);
37 static int8_t process_cs3(void);
40 static uint8_t matrix[MATRIX_ROWS];
41 #define ROW(code) ((code>>3)&0x0F)
42 #define COL(code) (code&0x07)
44 static int16_t read_wait(uint16_t wait_ms)
46 uint16_t start = timer_read();
48 while ((code = ibmpc_host_recv()) == -1 && timer_elapsed(start) < wait_ms);
52 static uint16_t read_keyboard_id(void)
58 code = ibmpc_host_send(0xF5);
61 code = ibmpc_host_send(0xF2);
62 if (code == -1) return 0xFFFF; // XT or No keyboard
63 if (code != 0xFA) return 0xFFFE; // Broken PS/2?
65 code = read_wait(1000);
66 if (code == -1) return 0x0000; // AT
67 id = (code & 0xFF)<<8;
69 code = read_wait(1000);
73 code = ibmpc_host_send(0xF4);
78 void matrix_init(void)
82 // initialize matrix state: all keys off
83 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
89 * keyboard recognition
91 * 1. Send F2 to get keyboard ID
92 * a. no ACK(FA): XT keyobard
93 * b. ACK but no ID: 84-key AT keyboard CodeSet2
94 * c. ID is AB 83: PS/2 keyboard CodeSet2
95 * d. ID is BF BF: Terminal keyboard CodeSet3
96 * e. error on recv: maybe broken PS/2
98 uint16_t keyboard_id = 0x0000;
99 keyboard_kind_t keyboard_kind = NONE;
100 uint8_t matrix_scan(void)
102 // scan code reading states
111 static uint16_t last_time;
115 xprintf("\nERR: %02X\n", ibmpc_error);
117 // when recv error, neither send error nor buffer full
118 if (!(ibmpc_error & (IBMPC_ERR_SEND | IBMPC_ERR_FULL))) {
119 // keyboard init again
126 // clear or process error
127 ibmpc_error = IBMPC_ERR_NONE;
132 ibmpc_protocol = IBMPC_PROTOCOL_AT;
133 keyboard_kind = NONE;
134 keyboard_id = 0x0000;
135 last_time = timer_read();
136 state = WAIT_STARTUP;
139 IBMPC_RESET(); // hard reset for some old XT keyboards
144 // read and ignore BAT code and other codes when power-up
146 if (timer_elapsed(last_time) > 1000) {
151 keyboard_id = read_keyboard_id();
153 xprintf("\nERR: %02X\n", ibmpc_error);
154 ibmpc_error = IBMPC_ERR_NONE;
156 xprintf("ID: %04X\n", keyboard_id);
157 if (0xAB00 == (keyboard_id & 0xFF00)) {
159 keyboard_kind = PC_AT;
160 } else if (0xBF00 == (keyboard_id & 0xFF00)) {
162 keyboard_kind = PC_TERMINAL;
163 } else if (0x0000 == keyboard_id) {
165 keyboard_kind = PC_AT;
166 } else if (0xFFFF == keyboard_id) {
168 keyboard_kind = PC_XT;
169 } else if (0xFFFE == keyboard_id) {
170 // CodeSet2 PS/2 fails to response?
171 keyboard_kind = PC_AT;
172 } else if (0x00FF == keyboard_id) {
173 // Mouse is not supported
174 xprintf("Mouse: not supported\n");
175 keyboard_kind = NONE;
177 keyboard_kind = PC_AT;
181 if (keyboard_kind == PC_XT) {
182 xprintf("kbd: XT\n");
183 ibmpc_protocol = IBMPC_PROTOCOL_XT;
184 } else if (keyboard_kind == PC_AT) {
185 xprintf("kbd: AT\n");
186 ibmpc_protocol = IBMPC_PROTOCOL_AT;
187 } else if (keyboard_kind == PC_TERMINAL) {
188 xprintf("kbd: Terminal\n");
189 ibmpc_protocol = IBMPC_PROTOCOL_AT;
190 // Set all keys - make/break [3]p.23
191 ibmpc_host_send(0xF8);
193 xprintf("kbd: Unknown\n");
194 ibmpc_protocol = IBMPC_PROTOCOL_AT;
199 led_set(host_keyboard_leds());
202 switch (keyboard_kind) {
204 if (process_cs1() == -1) state = INIT;
207 if (process_cs2() == -1) state = INIT;
210 if (process_cs3() == -1) state = INIT;
223 bool matrix_is_on(uint8_t row, uint8_t col)
225 return (matrix[row] & (1<<col));
229 uint8_t matrix_get_row(uint8_t row)
234 uint8_t matrix_key_count(void)
237 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
238 count += bitpop(matrix[i]);
245 static void matrix_make(uint8_t code)
247 if (!matrix_is_on(ROW(code), COL(code))) {
248 matrix[ROW(code)] |= 1<<COL(code);
253 static void matrix_break(uint8_t code)
255 if (matrix_is_on(ROW(code), COL(code))) {
256 matrix[ROW(code)] &= ~(1<<COL(code));
260 void matrix_clear(void)
262 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
265 void led_set(uint8_t usb_led)
267 if (keyboard_kind != PC_AT) return;
269 uint8_t ibmpc_led = 0;
270 if (usb_led & (1<<USB_LED_SCROLL_LOCK))
271 ibmpc_led |= (1<<IBMPC_LED_SCROLL_LOCK);
272 if (usb_led & (1<<USB_LED_NUM_LOCK))
273 ibmpc_led |= (1<<IBMPC_LED_NUM_LOCK);
274 if (usb_led & (1<<USB_LED_CAPS_LOCK))
275 ibmpc_led |= (1<<IBMPC_LED_CAPS_LOCK);
276 ibmpc_host_set_led(ibmpc_led);
280 /*******************************************************************************
281 * XT: Scan Code Set 1
285 * E0-escaped scan codes are translated into unused range of the matrix.(54-7F)
287 * 01-53: Normal codes used in original XT keyboard
288 * 54-7F: Not used in original XT keyboard
290 * 0 1 2 3 4 5 6 7 8 9 A B C D E F
291 * 50 - - - - * * x x x x * * * * * *
292 * 60 * * * * x x x x x x x x x x x *
293 * 70 x * * x * * x * * x * x * x x *
295 * -: codes existed in original XT keyboard
296 * *: E0-escaped codes translated
297 * x: Non-espcaped codes(Some are not used in real keyboards probably)
299 * Codes assigned in range 54-7F:
301 * 50 - 60 Up* 70 KANAx
302 * 51 - 61 Left* 71 Insert*
303 * 52 - 62 Down* 72 Delete*
304 * 53 - 63 Right* 73 ROx
305 * 54 PrintScr* 64 F13x 74 Home*
306 * 55 Pause* 65 F14x 75 End*
307 * 56 Euro2x 66 F15x 76 F24x
308 * 57 F11x 67 F16x 77 PageUp*
309 * 58 F12x 68 F17x 78 PageDown*
310 * 59 Keypad=x 69 F18x 79 HENKANx
311 * 5A LGUI* 6A F19x 7A RCTL*
312 * 5B RGUI* 6B F20x 7B MUHENKANx
313 * 5C APP* 6C F21x 7C RALT*
314 * 5D Mute* 6D F22x 7D JPYx
315 * 5E Volume Down* 6E F23x 7E Keypad,x
316 * 5F Volume Up* 6F Keypad Enter* 7F Keypad/ *
318 static uint8_t cs1_e0code(uint8_t code) {
320 // Original IBM XT keyboard doesn't use E0-codes probably
321 // Some XT compatilble keyobards need these keys?
322 case 0x37: return 0x54; // Print Screen
323 case 0x46: return 0x55; // Ctrl + Pause
324 case 0x5B: return 0x5A; // Left GUI
325 case 0x5C: return 0x5B; // Right GUI
326 case 0x5D: return 0x5C; // Application
327 case 0x20: return 0x5D; // Mute
328 case 0x2E: return 0x5E; // Volume Down
329 case 0x30: return 0x5F; // Volume Up
330 case 0x48: return 0x60; // Up
331 case 0x4B: return 0x61; // Left
332 case 0x50: return 0x62; // Down
333 case 0x4D: return 0x63; // Right
334 case 0x1C: return 0x6F; // Keypad Enter
335 case 0x52: return 0x71; // Insert
336 case 0x53: return 0x72; // Delete
337 case 0x47: return 0x74; // Home
338 case 0x4F: return 0x75; // End
339 case 0x49: return 0x77; // Page Up
340 case 0x51: return 0x78; // Page Down
341 case 0x1D: return 0x7A; // Right Ctrl
342 case 0x38: return 0x7C; // Right Alt
343 case 0x35: return 0x7F; // Keypad /
345 // Shared matrix cell with other keys
346 case 0x5E: return 0x70; // Power (KANA)
347 case 0x5F: return 0x79; // Sleep (HENKAN)
348 case 0x63: return 0x7B; // Wake (MUHENKAN)
351 xprintf("!CS1_?!\n");
357 static int8_t process_cs1(void)
362 // Pause: E1 1D 45, E1 9D C5
368 uint16_t code = ibmpc_host_recv();
386 matrix_break(code & 0x7F);
401 matrix_make(cs1_e0code(code));
403 matrix_break(cs1_e0code(code & 0x7F));
448 /*******************************************************************************
449 * AT, PS/2: Scan Code Set 2
451 * Exceptional Handling
452 * --------------------
453 * Some keys should be handled exceptionally. See [b].
455 * Scan codes are varied or prefix/postfix'd depending on modifier key state.
457 * 1) Insert, Delete, Home, End, PageUp, PageDown, Up, Down, Right, Left
458 * a) when Num Lock is off
459 * modifiers | make | break
460 * ----------+---------------------------+----------------------
461 * Ohter | <make> | <break>
462 * LShift | E0 F0 12 <make> | <break> E0 12
463 * RShift | E0 F0 59 <make> | <break> E0 59
464 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
466 * b) when Num Lock is on
467 * modifiers | make | break
468 * ----------+---------------------------+----------------------
469 * Other | E0 12 <make> | <break> E0 F0 12
470 * Shift'd | <make> | <break>
472 * Handling: These prefix/postfix codes are ignored.
476 * modifiers | make | break
477 * ----------+---------------------------+----------------------
478 * Ohter | <make> | <break>
479 * LShift | E0 F0 12 <make> | <break> E0 12
480 * RShift | E0 F0 59 <make> | <break> E0 59
481 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
483 * Handling: These prefix/postfix codes are ignored.
487 * modifiers | make | break
488 * ----------+--------------+-----------------------------------
489 * Other | E0 12 E0 7C | E0 F0 7C E0 F0 12
490 * Shift'd | E0 7C | E0 F0 7C
491 * Control'd | E0 7C | E0 F0 7C
494 * Handling: These prefix/postfix codes are ignored, and both scan codes
495 * 'E0 7C' and 84 are seen as PrintScreen.
498 * modifiers | make(no break code)
499 * ----------+--------------------------------------------------
500 * Other | E1 14 77 E1 F0 14 F0 77
501 * Control'd | E0 7E E0 F0 7E
503 * Handling: Both code sequences are treated as a whole.
504 * And we need a ad hoc 'pseudo break code' hack to get the key off
505 * because it has no break code.
508 * 'Hanguel/English'(F1) and 'Hanja'(F2) have no break code. See [a].
509 * These two Korean keys need exceptional handling and are not supported for now.
512 static uint8_t cs2_e0code(uint8_t code) {
514 // E0 prefixed codes translation See [a].
515 case 0x11: return 0x0F; // right alt
516 case 0x14: return 0x17; // right control
517 case 0x1F: return 0x19; // left GUI
518 case 0x27: return 0x1F; // right GUI
519 case 0x2F: return 0x5C; // apps
520 case 0x4A: return 0x60; // keypad /
521 case 0x5A: return 0x62; // keypad enter
522 case 0x69: return 0x27; // end
523 case 0x6B: return 0x53; // cursor left
524 case 0x6C: return 0x2F; // home
525 case 0x70: return 0x39; // insert
526 case 0x71: return 0x37; // delete
527 case 0x72: return 0x3F; // cursor down
528 case 0x74: return 0x47; // cursor right
529 case 0x75: return 0x4F; // cursor up
530 case 0x7A: return 0x56; // page down
531 case 0x7D: return 0x5E; // page up
532 case 0x7C: return 0x6F; // Print Screen
533 case 0x7E: return 0x00; // Control'd Pause
535 case 0x21: return 0x65; // volume down
536 case 0x32: return 0x6E; // volume up
537 case 0x23: return 0x7F; // mute
538 case 0x10: return 0x08; // (WWW search) -> F13
539 case 0x18: return 0x10; // (WWW favourites) -> F14
540 case 0x20: return 0x18; // (WWW refresh) -> F15
541 case 0x28: return 0x20; // (WWW stop) -> F16
542 case 0x30: return 0x28; // (WWW forward) -> F17
543 case 0x38: return 0x30; // (WWW back) -> F18
544 case 0x3A: return 0x38; // (WWW home) -> F19
545 case 0x40: return 0x40; // (my computer) -> F20
546 case 0x48: return 0x48; // (email) -> F21
547 case 0x2B: return 0x50; // (calculator) -> F22
548 case 0x34: return 0x08; // (play/pause) -> F13
549 case 0x3B: return 0x10; // (stop) -> F14
550 case 0x15: return 0x18; // (previous track) -> F15
551 case 0x4D: return 0x20; // (next track) -> F16
552 case 0x50: return 0x28; // (media select) -> F17
553 case 0x5E: return 0x50; // (ACPI wake) -> F22
554 case 0x3F: return 0x57; // (ACPI sleep) -> F23
555 case 0x37: return 0x5F; // (ACPI power) -> F24
557 // https://github.com/tmk/tmk_keyboard/pull/636
558 case 0x03: return 0x18; // Help DEC LK411 -> F15
559 case 0x04: return 0x08; // F13 DEC LK411
560 case 0x0B: return 0x20; // Do DEC LK411 -> F16
561 case 0x0C: return 0x10; // F14 DEC LK411
562 case 0x0D: return 0x19; // LCompose DEC LK411 -> LGUI
563 case 0x79: return 0x6D; // KP- DEC LK411 -> PCMM
564 case 0x83: return 0x28; // F17 DEC LK411
565 default: return (code & 0x7F);
569 static int8_t process_cs2(void)
571 // scan code reading states
585 uint16_t code = ibmpc_host_recv();
606 case 0x84: // Alt'd PrintScreen
610 case 0x00: // Overrun [3]p.26
612 xprintf("!CS2_OVERRUN!\n");
615 case 0xAA: // Self-test passed
616 case 0xFC: // Self-test failed
617 // reset or plugin-in new keyboard
621 default: // normal key make
626 xprintf("!CS2_INIT!\n");
631 case E0: // E0-Prefixed
633 case 0x12: // to be ignored
634 case 0x59: // to be ignored
642 matrix_make(cs2_e0code(code));
645 xprintf("!CS2_E0!\n");
650 case F0: // Break code
656 case 0x84: // Alt'd PrintScreen
665 xprintf("!CS2_F0!\n");
670 case E0_F0: // Break code of E0-prefixed
672 case 0x12: // to be ignored
673 case 0x59: // to be ignored
678 matrix_break(cs2_e0code(code));
681 xprintf("!CS2_E0_F0!\n");
686 // Pause make: E1 14 77
709 // Pause break: E1 F0 14 F0 77
745 * Terminal: Scan Code Set 3
749 * Scan code 0x83 and 0x84 are handled exceptioanally to fit into 1-byte range index.
751 static int8_t process_cs3(void)
758 uint16_t code = ibmpc_host_recv();
768 xprintf("!CS3_%02X!\n", code);
777 case 0x84: // keypad -
780 default: // normal key make
784 xprintf("!CS3_%02X!\n", code);
789 case F0: // Break code
793 xprintf("!CS3_F0_%02X!\n", code);
801 case 0x84: // keypad -
810 xprintf("!CS3_F0_%02X!\n", code);
820 * IBM PC Keyboard Protocol Resources:
822 * [a] Microsoft USB HID to PS/2 Translation Table - Scan Code Set 1 and 2
823 * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/translate.pdf
825 * [b] Microsoft Keyboard Scan Code Specification - Special rules of Scan Code Set 1 and 2
826 * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc
828 * [1] PS/2 Reference Manuals - Collection of IBM Personal System/2 documents.
829 * http://www.mcamafia.de/pdf/pdfref.htm
831 * [2] Keyboard and Auxiliary Device Controller - Signal Timing and Format
832 * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
834 * [3] Keyboards(101- and 102-key) - Keyboard Layout, Scan Code Set, POR, and Commands.
835 * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf
837 * [4] IBM PC XT Keyboard Protocol
838 * https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol
840 * [5] IBM Keyboard Scan Code by John Elliott - 83-key, 84-key, 102-key and 122-key
841 * https://www.seasip.info/VintagePC/index.html
843 * [6] IBM 1391406 Keyboard - Scan Code Set 2 of 102-key PS/2 keyboard
844 * https://www.seasip.info/VintagePC/ibm_1391406.html
846 * [7] The IBM 6110344 Keyboard - Scan Code Set 3 of 122-key terminal keyboard
847 * https://www.seasip.info/VintagePC/ibm_6110344.html
849 * [y] TrackPoint Engineering Specifications for version 3E
850 * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
852 * [z] [Soarer's XT/AT/PS2/Terminal to USB converter]
853 * https://geekhack.org/index.php?topic=17458.0