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"
33 static void matrix_make(uint8_t code);
34 static void matrix_break(uint8_t code);
36 static int8_t process_cs1(void);
37 static int8_t process_cs2(void);
38 static int8_t process_cs3(void);
41 static uint8_t matrix[MATRIX_ROWS];
42 #define ROW(code) ((code>>3)&0x0F)
43 #define COL(code) (code&0x07)
45 static int16_t read_wait(uint16_t wait_ms)
47 uint16_t start = timer_read();
49 while ((code = ibmpc_host_recv()) == -1 && timer_elapsed(start) < wait_ms);
53 static uint16_t read_keyboard_id(void)
59 //code = ibmpc_host_send(0xF5);
62 code = ibmpc_host_send(0xF2);
63 if (code == -1) { id = 0xFFFF; goto DONE; } // XT or No keyboard
64 if (code != 0xFA) { id = 0xFFFE; goto DONE; } // Broken PS/2?
66 // ID takes 500ms max TechRef [8] 4-41
67 code = read_wait(500);
68 if (code == -1) { id = 0x0000; goto DONE; } // AT
69 id = (code & 0xFF)<<8;
71 code = read_wait(500);
76 //code = ibmpc_host_send(0xF4);
81 void hook_early_init(void)
87 void matrix_init(void)
91 // initialize matrix state: all keys off
92 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
98 * keyboard recognition
100 * 1. Send F2 to get keyboard ID
101 * a. no ACK(FA): XT keyobard
102 * b. ACK but no ID: 84-key AT keyboard CodeSet2
103 * c. ID is AB 83: PS/2 keyboard CodeSet2
104 * d. ID is BF BF: Terminal keyboard CodeSet3
105 * e. error on recv: maybe broken PS/2
107 uint16_t keyboard_id = 0x0000;
108 keyboard_kind_t keyboard_kind = NONE;
109 uint8_t matrix_scan(void)
111 // scan code reading states
124 static uint16_t init_time;
128 xprintf("\nERR: %02X\n", ibmpc_error);
130 // when recv error, neither send error nor buffer full
131 if (!(ibmpc_error & (IBMPC_ERR_SEND | IBMPC_ERR_FULL))) {
132 // keyboard init again
139 // clear or process error
140 ibmpc_error = IBMPC_ERR_NONE;
145 xprintf("I%u ", timer_read());
146 keyboard_kind = NONE;
147 keyboard_id = 0x0000;
155 // Reset XT-initialize keyboard
156 // XT: hard reset 500ms for IBM XT Type-1 keyboard and clones
157 // XT: soft reset 20ms min(clock Lo)
158 ibmpc_host_disable(); // soft reset: inihibit(clock Lo/Data Hi)
159 IBMPC_RST_LO(); // hard reset: reset pin Lo
161 init_time = timer_read();
162 state = XT_RESET_WAIT;
165 if (timer_elapsed(init_time) > 500) {
166 state = XT_RESET_DONE;
170 IBMPC_RST_HIZ(); // hard reset: reset pin HiZ
171 ibmpc_host_isr_clear();
172 ibmpc_host_enable(); // soft reset: idle(clock Hi/Data Hi)
174 xprintf("X%u ", timer_read());
175 init_time = timer_read();
179 // 1) Read BAT code and ID on keybaord power-up
180 // For example, XT/AT sends 'AA' and Terminal sends 'AA BF BF' after BAT
181 // AT 84-key: POR and BAT can take 900-9900ms according to AT TechRef [8] 4-7
182 // AT 101/102-key: POR and BAT can take 450-2500ms according to AT TechRef [8] 4-39
183 // 2) Read key typed by user or anything after error on protocol or scan code
184 // This can happen in case of keyboard hotswap, unstable hardware, signal integrity problem or bug
186 if (timer_elapsed(init_time) > 10000) {
189 if (ibmpc_host_recv() != -1) { // wait for AA
190 xprintf("W%u ", timer_read());
191 init_time = timer_read();
196 // NOTE: we can omit to wait BF BF
197 // ID takes 500ms max? TechRef [8] 4-41, though 1ms is enough for 122-key Terminal 6110345
198 if (timer_elapsed(init_time) > 500) {
201 if (ibmpc_host_recv() != -1) { // wait for BF
202 xprintf("W%u ", timer_read());
203 init_time = timer_read();
208 if (timer_elapsed(init_time) > 500) {
211 if (ibmpc_host_recv() != -1) { // wait for BF
212 xprintf("W%u ", timer_read());
217 xprintf("R%u ", timer_read());
219 keyboard_id = read_keyboard_id();
221 xprintf("\nERR: %02X\n", ibmpc_error);
222 ibmpc_error = IBMPC_ERR_NONE;
225 if (0xAB00 == (keyboard_id & 0xFF00)) { // CodeSet2 PS/2
226 keyboard_kind = PC_AT;
227 } else if (0xBF00 == (keyboard_id & 0xFF00)) { // CodeSet3 Terminal
228 keyboard_kind = PC_TERMINAL;
229 } else if (0x0000 == keyboard_id) { // CodeSet2 AT
230 keyboard_kind = PC_AT;
231 } else if (0xFFFF == keyboard_id) { // CodeSet1 XT
232 keyboard_kind = PC_XT;
233 } else if (0xFFFE == keyboard_id) { // CodeSet2 PS/2 fails to response?
234 keyboard_kind = PC_AT;
235 } else if (0x00FF == keyboard_id) { // Mouse is not supported
236 xprintf("Mouse: not supported\n");
237 keyboard_kind = NONE;
239 keyboard_kind = PC_AT;
242 xprintf("ID:%04X(%d)\n", keyboard_id, keyboard_kind);
247 xprintf("S%u ", timer_read());
248 switch (keyboard_kind) {
252 led_set(host_keyboard_leds());
255 ibmpc_host_send(0xF8);
261 xprintf("L%u ", timer_read());
263 switch (keyboard_kind) {
265 if (process_cs1() == -1) state = INIT;
268 if (process_cs2() == -1) state = INIT;
271 if (process_cs3() == -1) state = INIT;
284 bool matrix_is_on(uint8_t row, uint8_t col)
286 return (matrix[row] & (1<<col));
290 uint8_t matrix_get_row(uint8_t row)
295 uint8_t matrix_key_count(void)
298 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
299 count += bitpop(matrix[i]);
306 static void matrix_make(uint8_t code)
308 if (!matrix_is_on(ROW(code), COL(code))) {
309 matrix[ROW(code)] |= 1<<COL(code);
314 static void matrix_break(uint8_t code)
316 if (matrix_is_on(ROW(code), COL(code))) {
317 matrix[ROW(code)] &= ~(1<<COL(code));
321 void matrix_clear(void)
323 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
326 void led_set(uint8_t usb_led)
328 if (keyboard_kind != PC_AT) return;
330 uint8_t ibmpc_led = 0;
331 if (usb_led & (1<<USB_LED_SCROLL_LOCK))
332 ibmpc_led |= (1<<IBMPC_LED_SCROLL_LOCK);
333 if (usb_led & (1<<USB_LED_NUM_LOCK))
334 ibmpc_led |= (1<<IBMPC_LED_NUM_LOCK);
335 if (usb_led & (1<<USB_LED_CAPS_LOCK))
336 ibmpc_led |= (1<<IBMPC_LED_CAPS_LOCK);
337 ibmpc_host_set_led(ibmpc_led);
341 /*******************************************************************************
342 * XT: Scan Code Set 1
346 * E0-escaped scan codes are translated into unused range of the matrix.(54-7F)
348 * 01-53: Normal codes used in original XT keyboard
349 * 54-7F: Not used in original XT keyboard
351 * 0 1 2 3 4 5 6 7 8 9 A B C D E F
352 * 50 - - - - * * x x x x * * * * * *
353 * 60 * * * * x x x x x x x x x x x *
354 * 70 x * * x * * x * * x * x * x x *
356 * -: codes existed in original XT keyboard
357 * *: E0-escaped codes translated
358 * x: Non-espcaped codes(Some are not used in real keyboards probably)
360 * Codes assigned in range 54-7F:
362 * 50 - 60 Up* 70 KANAx
363 * 51 - 61 Left* 71 Insert*
364 * 52 - 62 Down* 72 Delete*
365 * 53 - 63 Right* 73 ROx
366 * 54 PrintScr* 64 F13x 74 Home*
367 * 55 Pause* 65 F14x 75 End*
368 * 56 Euro2x 66 F15x 76 F24x
369 * 57 F11x 67 F16x 77 PageUp*
370 * 58 F12x 68 F17x 78 PageDown*
371 * 59 Keypad=x 69 F18x 79 HENKANx
372 * 5A LGUI* 6A F19x 7A RCTL*
373 * 5B RGUI* 6B F20x 7B MUHENKANx
374 * 5C APP* 6C F21x 7C RALT*
375 * 5D Mute* 6D F22x 7D JPYx
376 * 5E Volume Down* 6E F23x 7E Keypad,x
377 * 5F Volume Up* 6F Keypad Enter* 7F Keypad/ *
379 static uint8_t cs1_e0code(uint8_t code) {
381 // Original IBM XT keyboard doesn't use E0-codes probably
382 // Some XT compatilble keyobards need these keys?
383 case 0x37: return 0x54; // Print Screen
384 case 0x46: return 0x55; // Ctrl + Pause
385 case 0x5B: return 0x5A; // Left GUI
386 case 0x5C: return 0x5B; // Right GUI
387 case 0x5D: return 0x5C; // Application
388 case 0x20: return 0x5D; // Mute
389 case 0x2E: return 0x5E; // Volume Down
390 case 0x30: return 0x5F; // Volume Up
391 case 0x48: return 0x60; // Up
392 case 0x4B: return 0x61; // Left
393 case 0x50: return 0x62; // Down
394 case 0x4D: return 0x63; // Right
395 case 0x1C: return 0x6F; // Keypad Enter
396 case 0x52: return 0x71; // Insert
397 case 0x53: return 0x72; // Delete
398 case 0x47: return 0x74; // Home
399 case 0x4F: return 0x75; // End
400 case 0x49: return 0x77; // Page Up
401 case 0x51: return 0x78; // Page Down
402 case 0x1D: return 0x7A; // Right Ctrl
403 case 0x38: return 0x7C; // Right Alt
404 case 0x35: return 0x7F; // Keypad /
406 // Shared matrix cell with other keys
407 case 0x5E: return 0x70; // Power (KANA)
408 case 0x5F: return 0x79; // Sleep (HENKAN)
409 case 0x63: return 0x7B; // Wake (MUHENKAN)
412 xprintf("!CS1_?!\n");
418 static int8_t process_cs1(void)
423 // Pause: E1 1D 45, E1 9D C5
429 uint16_t code = ibmpc_host_recv();
438 case 0xFF: // Error/Overrun [3]p.26
439 xprintf("!CS1_%02X!\n", code);
452 matrix_break(code & 0x7F);
467 matrix_make(cs1_e0code(code));
469 matrix_break(cs1_e0code(code & 0x7F));
514 /*******************************************************************************
515 * AT, PS/2: Scan Code Set 2
517 * Exceptional Handling
518 * --------------------
519 * Some keys should be handled exceptionally. See [b].
521 * Scan codes are varied or prefix/postfix'd depending on modifier key state.
523 * 1) Insert, Delete, Home, End, PageUp, PageDown, Up, Down, Right, Left
524 * a) when Num Lock is off
525 * modifiers | make | break
526 * ----------+---------------------------+----------------------
527 * Ohter | <make> | <break>
528 * LShift | E0 F0 12 <make> | <break> E0 12
529 * RShift | E0 F0 59 <make> | <break> E0 59
530 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
532 * b) when Num Lock is on
533 * modifiers | make | break
534 * ----------+---------------------------+----------------------
535 * Other | E0 12 <make> | <break> E0 F0 12
536 * Shift'd | <make> | <break>
538 * Handling: These prefix/postfix codes are ignored.
542 * modifiers | make | break
543 * ----------+---------------------------+----------------------
544 * Ohter | <make> | <break>
545 * LShift | E0 F0 12 <make> | <break> E0 12
546 * RShift | E0 F0 59 <make> | <break> E0 59
547 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
549 * Handling: These prefix/postfix codes are ignored.
553 * modifiers | make | break
554 * ----------+--------------+-----------------------------------
555 * Other | E0 12 E0 7C | E0 F0 7C E0 F0 12
556 * Shift'd | E0 7C | E0 F0 7C
557 * Control'd | E0 7C | E0 F0 7C
560 * Handling: These prefix/postfix codes are ignored, and both scan codes
561 * 'E0 7C' and 84 are seen as PrintScreen.
564 * modifiers | make(no break code)
565 * ----------+--------------------------------------------------
566 * Other | E1 14 77 E1 F0 14 F0 77
567 * Control'd | E0 7E E0 F0 7E
569 * Handling: Both code sequences are treated as a whole.
570 * And we need a ad hoc 'pseudo break code' hack to get the key off
571 * because it has no break code.
574 * 'Hanguel/English'(F1) and 'Hanja'(F2) have no break code. See [a].
575 * These two Korean keys need exceptional handling and are not supported for now.
578 static uint8_t cs2_e0code(uint8_t code) {
580 // E0 prefixed codes translation See [a].
581 case 0x11: return 0x0F; // right alt
582 case 0x14: return 0x17; // right control
583 case 0x1F: return 0x19; // left GUI
584 case 0x27: return 0x1F; // right GUI
585 case 0x2F: return 0x5C; // apps
586 case 0x4A: return 0x60; // keypad /
587 case 0x5A: return 0x62; // keypad enter
588 case 0x69: return 0x27; // end
589 case 0x6B: return 0x53; // cursor left
590 case 0x6C: return 0x2F; // home
591 case 0x70: return 0x39; // insert
592 case 0x71: return 0x37; // delete
593 case 0x72: return 0x3F; // cursor down
594 case 0x74: return 0x47; // cursor right
595 case 0x75: return 0x4F; // cursor up
596 case 0x7A: return 0x56; // page down
597 case 0x7D: return 0x5E; // page up
598 case 0x7C: return 0x6F; // Print Screen
599 case 0x7E: return 0x00; // Control'd Pause
601 case 0x21: return 0x65; // volume down
602 case 0x32: return 0x6E; // volume up
603 case 0x23: return 0x7F; // mute
604 case 0x10: return 0x08; // (WWW search) -> F13
605 case 0x18: return 0x10; // (WWW favourites) -> F14
606 case 0x20: return 0x18; // (WWW refresh) -> F15
607 case 0x28: return 0x20; // (WWW stop) -> F16
608 case 0x30: return 0x28; // (WWW forward) -> F17
609 case 0x38: return 0x30; // (WWW back) -> F18
610 case 0x3A: return 0x38; // (WWW home) -> F19
611 case 0x40: return 0x40; // (my computer) -> F20
612 case 0x48: return 0x48; // (email) -> F21
613 case 0x2B: return 0x50; // (calculator) -> F22
614 case 0x34: return 0x08; // (play/pause) -> F13
615 case 0x3B: return 0x10; // (stop) -> F14
616 case 0x15: return 0x18; // (previous track) -> F15
617 case 0x4D: return 0x20; // (next track) -> F16
618 case 0x50: return 0x28; // (media select) -> F17
619 case 0x5E: return 0x50; // (ACPI wake) -> F22
620 case 0x3F: return 0x57; // (ACPI sleep) -> F23
621 case 0x37: return 0x5F; // (ACPI power) -> F24
623 // https://github.com/tmk/tmk_keyboard/pull/636
624 case 0x03: return 0x18; // Help DEC LK411 -> F15
625 case 0x04: return 0x08; // F13 DEC LK411
626 case 0x0B: return 0x20; // Do DEC LK411 -> F16
627 case 0x0C: return 0x10; // F14 DEC LK411
628 case 0x0D: return 0x19; // LCompose DEC LK411 -> LGUI
629 case 0x79: return 0x6D; // KP- DEC LK411 -> PCMM
630 case 0x83: return 0x28; // F17 DEC LK411
631 default: return (code & 0x7F);
635 static int8_t process_cs2(void)
637 // scan code reading states
651 uint16_t code = ibmpc_host_recv();
659 case 0x00: // Error/Overrun [3]p.26
662 xprintf("!CS2_%02X!\n", code);
679 case 0x84: // Alt'd PrintScreen
683 case 0xAA: // Self-test passed
684 case 0xFC: // Self-test failed
685 // reset or plugin-in new keyboard
689 default: // normal key make
695 xprintf("!CS2_INIT!\n");
700 case E0: // E0-Prefixed
702 case 0x12: // to be ignored
703 case 0x59: // to be ignored
712 matrix_make(cs2_e0code(code));
715 xprintf("!CS2_E0!\n");
720 case F0: // Break code
726 case 0x84: // Alt'd PrintScreen
736 xprintf("!CS2_F0!\n");
741 case E0_F0: // Break code of E0-prefixed
743 case 0x12: // to be ignored
744 case 0x59: // to be ignored
750 matrix_break(cs2_e0code(code));
753 xprintf("!CS2_E0_F0!\n");
758 // Pause make: E1 14 77
781 // Pause break: E1 F0 14 F0 77
817 * Terminal: Scan Code Set 3
821 * Scan code 0x83 and 0x84 are handled exceptioanally to fit into 1-byte range index.
823 static int8_t process_cs3(void)
830 uint16_t code = ibmpc_host_recv();
838 case 0x00: // Error/Overrun [3]p.26
840 xprintf("!CS3_%02X!\n", code);
849 case 0x84: // keypad -
852 default: // normal key make
856 xprintf("!CS3_%02X!\n", code);
861 case F0: // Break code
865 xprintf("!CS3_F0_%02X!\n", code);
873 case 0x84: // keypad -
882 xprintf("!CS3_F0_%02X!\n", code);
892 * IBM PC Keyboard Protocol Resources:
894 * [a] Microsoft USB HID to PS/2 Translation Table - Scan Code Set 1 and 2
895 * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/translate.pdf
897 * [b] Microsoft Keyboard Scan Code Specification - Special rules of Scan Code Set 1 and 2
898 * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc
900 * [1] PS/2 Reference Manuals - Collection of IBM Personal System/2 documents.
901 * http://www.mcamafia.de/pdf/pdfref.htm
903 * [2] Keyboard and Auxiliary Device Controller - Signal Timing and Format
904 * http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
906 * [3] Keyboards(101- and 102-key) - Keyboard Layout, Scan Code Set, POR, and Commands.
907 * http://www.mcamafia.de/pdf/ibm_hitrc11.pdf
909 * [4] IBM PC XT Keyboard Protocol
910 * https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol
912 * [5] IBM Keyboard Scan Code by John Elliott - 83-key, 84-key, 102-key and 122-key
913 * https://www.seasip.info/VintagePC/index.html
915 * [6] IBM 1391406 Keyboard - Scan Code Set 2 of 102-key PS/2 keyboard
916 * https://www.seasip.info/VintagePC/ibm_1391406.html
918 * [7] The IBM 6110344 Keyboard - Scan Code Set 3 of 122-key terminal keyboard
919 * https://www.seasip.info/VintagePC/ibm_6110344.html
921 * [y] TrackPoint Engineering Specifications for version 3E
922 * https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
924 * [z] [Soarer's XT/AT/PS2/Terminal to USB converter]
925 * https://geekhack.org/index.php?topic=17458.0