converter/adb_usb/matrix.c

   1 /*
   2 Copyright 2011 Jun Wako <wakojun@gmail.com>
   3
   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.
   8
   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.
  13
  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/>.
  16 */
  17
  18 /*
  19  * scan matrix
  20  */
  21 #include <stdint.h>
  22 #include <stdbool.h>
  23 #include <avr/io.h>
  24 #include <util/delay.h>
  25 #include "print.h"
  26 #include "util.h"
  27 #include "debug.h"
  28 #include "adb.h"
  29 #include "matrix.h"
  30 #include "report.h"
  31 #include "host.h"
  32 #include "led.h"
  33
  34
  35
  36
  37 static bool has_media_keys = false;
  38 static bool is_iso_layout = false;
  39 static report_mouse_t mouse_report = {};
  40
  41 // matrix state buffer(1:on, 0:off)
  42 static matrix_row_t matrix[MATRIX_ROWS];
  43
  44 static void register_key(uint8_t key);
  45
  46
  47 void matrix_init(void)
  48 {
  49     // LED on
  50     DDRD |= (1<<6); PORTD |= (1<<6);
  51
  52     adb_host_init();
  53     // wait for keyboard to boot up and receive command
  54     _delay_ms(2000);
  55
  56     // device scan
  57     xprintf("Before init:\n");
  58     for (uint8_t addr = 1; addr < 16; addr++) {
  59         uint16_t reg3 = adb_host_talk(addr, ADB_REG_3);
  60         if (reg3) {
  61             xprintf("Scan: addr:%d, reg3:%04X\n", addr, reg3);
  62         }
  63         _delay_ms(20);
  64     }
  65
  66     // Determine ISO keyboard by handler id
  67     // http://lxr.free-electrons.com/source/drivers/macintosh/adbhid.c?v=4.4#L815
  68     uint8_t handler_id = (uint8_t) adb_host_talk(ADB_ADDR_KEYBOARD, ADB_REG_3);
  69     switch (handler_id) {
  70     case 0x04: case 0x05: case 0x07: case 0x09: case 0x0D:
  71     case 0x11: case 0x14: case 0x19: case 0x1D: case 0xC1:
  72     case 0xC4: case 0xC7:
  73         is_iso_layout = true;
  74         break;
  75     default:
  76         is_iso_layout = false;
  77         break;
  78     }
  79
  80     // Adjustable keyboard media keys: address=0x07 and handlerID=0x02
  81     has_media_keys = (0x02 == (adb_host_talk(ADB_ADDR_APPLIANCE, ADB_REG_3) & 0xff));
  82     if (has_media_keys) {
  83         xprintf("Found: media keys\n");
  84     }
  85
  86     // Enable keyboard left/right modifier distinction
  87     // Listen Register3
  88     //  upper byte: reserved bits 0000, keyboard address 0010
  89     //  lower byte: device handler 00000011
  90     adb_host_listen(ADB_ADDR_KEYBOARD, ADB_REG_3, ADB_ADDR_KEYBOARD, ADB_HANDLER_EXTENDED_PROTOCOL);
  91
  92     // device scan
  93     xprintf("After init:\n");
  94     for (uint8_t addr = 1; addr < 16; addr++) {
  95         uint16_t reg3 = adb_host_talk(addr, ADB_REG_3);
  96         if (reg3) {
  97             xprintf("Scan: addr:%d, reg3:%04X\n", addr, reg3);
  98         }
  99         _delay_ms(20);
 100     }
 101
 102     // initialize matrix state: all keys off
 103     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 104
 105     led_set(host_keyboard_leds());
 106
 107     debug_enable = true;
 108     //debug_matrix = true;
 109     //debug_keyboard = true;
 110     //debug_mouse = true;
 111     print("debug enabled.\n");
 112
 113     // LED off
 114     DDRD |= (1<<6); PORTD &= ~(1<<6);
 115     return;
 116 }
 117
 118 #ifdef ADB_MOUSE_ENABLE
 119
 120 #ifdef MAX
 121 #undef MAX
 122 #endif
 123 #define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
 124
 125 void adb_mouse_task(void)
 126 {
 127     uint16_t codes;
 128     int16_t x, y;
 129     static int8_t mouseacc;
 130     _delay_ms(12);  // delay for preventing overload of poor ADB keyboard controller
 131     codes = adb_host_mouse_recv();
 132     // If nothing received reset mouse acceleration, and quit.
 133     if (!codes) {
 134         mouseacc = 1;
 135         return;
 136     };
 137     // Bit sixteen is button.
 138     if (~codes & (1 << 15))
 139         mouse_report.buttons |= MOUSE_BTN1;
 140     if (codes & (1 << 15))
 141         mouse_report.buttons &= ~MOUSE_BTN1;
 142     // lower seven bits are movement, as signed int_7.
 143     // low byte is X-axis, high byte is Y.
 144     y = (codes>>8 & 0x3F);
 145     x = (codes>>0 & 0x3F);
 146     // bit seven and fifteen is negative
 147     // usb does not use int_8, but int_7 (measuring distance) with sign-bit.
 148     if (codes & (1 << 6))
 149           x = (x-0x40);
 150     if (codes & (1 << 14))
 151          y = (y-0x40);
 152     // Accelerate mouse. (They weren't meant to be used on screens larger than 320x200).
 153     x *= mouseacc;
 154     y *= mouseacc;
 155     // Cap our two bytes per axis to one byte.
 156     // Easier with a MIN-function, but since -MAX(-a,-b) = MIN(a,b)...
 157          // I.E. MIN(MAX(x,-127),127) = -MAX(-MAX(x, -127), -127) = MIN(-MIN(-x,127),127)
 158     mouse_report.x = -MAX(-MAX(x, -127), -127);
 159     mouse_report.y = -MAX(-MAX(y, -127), -127);
 160     if (debug_mouse) {
 161             print("adb_host_mouse_recv: "); print_bin16(codes); print("\n");
 162             print("adb_mouse raw: [");
 163             phex(mouseacc); print(" ");
 164             phex(mouse_report.buttons); print("|");
 165             print_decs(mouse_report.x); print(" ");
 166             print_decs(mouse_report.y); print("]\n");
 167     }
 168     // Send result by usb.
 169     host_mouse_send(&mouse_report);
 170     // increase acceleration of mouse
 171     mouseacc += ( mouseacc < ADB_MOUSE_MAXACC ? 1 : 0 );
 172     return;
 173 }
 174 #endif
 175
 176 uint8_t matrix_scan(void)
 177 {
 178     /* extra_key is volatile and more convoluted than necessary because gcc refused
 179     to generate valid code otherwise. Making extra_key uint8_t and constructing codes
 180     here via codes = extra_key<<8 | 0xFF; would consistently fail to even LOAD
 181     extra_key from memory, and leave garbage in the high byte of codes. I tried
 182     dozens of code variations and it kept generating broken assembly output. So
 183     beware if attempting to make extra_key code more logical and efficient. */
 184     static volatile uint16_t extra_key = 0xFFFF;
 185     uint16_t codes;
 186     uint8_t key0, key1;
 187
 188     codes = extra_key;
 189     extra_key = 0xFFFF;
 190
 191     if ( codes == 0xFFFF )
 192     {
 193         _delay_ms(12);  // delay for preventing overload of poor ADB keyboard controller
 194         codes = adb_host_kbd_recv(ADB_ADDR_KEYBOARD);
 195
 196         // Adjustable keybaord media keys
 197         if (codes == 0 && has_media_keys &&
 198                 (codes = adb_host_kbd_recv(ADB_ADDR_APPLIANCE))) {
 199             // key1
 200             switch (codes & 0x7f ) {
 201             case 0x00:  // Mic
 202                 codes = (codes & ~0x007f) | 0x42;
 203                 break;
 204             case 0x01:  // Mute
 205                 codes = (codes & ~0x007f) | 0x4a;
 206                 break;
 207             case 0x02:  // Volume down
 208                 codes = (codes & ~0x007f) | 0x49;
 209                 break;
 210             case 0x03:  // Volume Up
 211                 codes = (codes & ~0x007f) | 0x48;
 212                 break;
 213             case 0x7F:  // no code
 214                 break;
 215             default:
 216                 xprintf("ERROR: media key1\n");
 217                 return 0x11;
 218             }
 219             // key0
 220             switch ((codes >> 8) & 0x7f ) {
 221             case 0x00:  // Mic
 222                 codes = (codes & ~0x7f00) | (0x42 << 8);
 223                 break;
 224             case 0x01:  // Mute
 225                 codes = (codes & ~0x7f00) | (0x4a << 8);
 226                 break;
 227             case 0x02:  // Volume down
 228                 codes = (codes & ~0x7f00) | (0x49 << 8);
 229                 break;
 230             case 0x03:  // Volume Up
 231                 codes = (codes & ~0x7f00) | (0x48 << 8);
 232                 break;
 233             default:
 234                 xprintf("ERROR: media key0\n");
 235                 return 0x10;
 236             }
 237         }
 238     }
 239     key0 = codes>>8;
 240     key1 = codes&0xFF;
 241
 242     if (debug_matrix && codes) {
 243         print("adb_host_kbd_recv: "); phex16(codes); print("\n");
 244     }
 245
 246     if (codes == 0) {                           // no keys
 247         return 0;
 248     } else if (codes == 0x7F7F) {   // power key press
 249         register_key(0x7F);
 250     } else if (codes == 0xFFFF) {   // power key release
 251         register_key(0xFF);
 252     } else if (key0 == 0xFF) {      // error
 253         xprintf("adb_host_kbd_recv: ERROR(%d)\n", codes);
 254         // something wrong or plug-in
 255         matrix_init();
 256         return key1;
 257     } else {
 258         /* Swap codes for ISO keyboard
 259          * https://github.com/tmk/tmk_keyboard/issues/35
 260          *
 261          * ANSI
 262          * ,-----------    ----------.
 263          * | *a|  1|  2     =|Backspa|
 264          * |-----------    ----------|
 265          * |Tab  |  Q|     |  ]|   *c|
 266          * |-----------    ----------|
 267          * |CapsLo|  A|    '|Return  |
 268          * |-----------    ----------|
 269          * |Shift   |      Shift     |
 270          * `-----------    ----------'
 271          *
 272          * ISO
 273          * ,-----------    ----------.
 274          * | *a|  1|  2     =|Backspa|
 275          * |-----------    ----------|
 276          * |Tab  |  Q|     |  ]|Retur|
 277          * |-----------    -----`    |
 278          * |CapsLo|  A|    '| *c|    |
 279          * |-----------    ----------|
 280          * |Shif| *b|      Shift     |
 281          * `-----------    ----------'
 282          *
 283          *         ADB scan code   USB usage
 284          *         -------------   ---------
 285          * Key     ANSI    ISO     ANSI    ISO
 286          * ---------------------------------------------
 287          * *a      0x32    0x0A    0x35    0x35
 288          * *b      ----    0x32    ----    0x64
 289          * *c      0x2A    0x2A    0x31    0x31(or 0x32)
 290          */
 291         if (is_iso_layout) {
 292             if ((key0 & 0x7F) == 0x32) {
 293                 key0 = (key0 & 0x80) | 0x0A;
 294             } else if ((key0 & 0x7F) == 0x0A) {
 295                 key0 = (key0 & 0x80) | 0x32;
 296             }
 297         }
 298         register_key(key0);
 299         if (key1 != 0xFF)       // key1 is 0xFF when no second key.
 300             extra_key = key1<<8 | 0xFF; // process in a separate call
 301     }
 302
 303     return 1;
 304 }
 305
 306 inline
 307 matrix_row_t matrix_get_row(uint8_t row)
 308 {
 309     return matrix[row];
 310 }
 311
 312 inline
 313 static void register_key(uint8_t key)
 314 {
 315     uint8_t col, row;
 316     col = key&0x07;
 317     row = (key>>3)&0x0F;
 318     if (key&0x80) {
 319         matrix[row] &= ~(1<<col);
 320     } else {
 321         matrix[row] |=  (1<<col);
 322     }
 323 }