host.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 #include <stdint.h>
  19 #include <avr/interrupt.h>
  20 #include "usb_keycodes.h"
  21 #include "host.h"
  22 #include "util.h"
  23 #include "debug.h"
  24
  25
  26 #ifdef NKRO_ENABLE
  27 bool keyboard_nkro = false;
  28 #endif
  29
  30 static host_driver_t *driver;
  31 static report_keyboard_t report0;
  32 static report_keyboard_t report1;
  33 report_keyboard_t *keyboard_report = &report0;
  34 report_keyboard_t *keyboard_report_prev = &report1;
  35
  36
  37 static inline void add_key_byte(uint8_t code);
  38 static inline void add_key_bit(uint8_t code);
  39
  40
  41 void host_set_driver(host_driver_t *d)
  42 {
  43     driver = d;
  44 }
  45
  46 host_driver_t *host_get_driver(void)
  47 {
  48     return driver;
  49 }
  50
  51 uint8_t host_keyboard_leds(void)
  52 {
  53     if (!driver) return 0;
  54     return (*driver->keyboard_leds)();
  55 }
  56
  57 /* keyboard report operations */
  58 void host_add_key(uint8_t key)
  59 {
  60 #ifdef NKRO_ENABLE
  61     if (keyboard_nkro) {
  62         add_key_bit(key);
  63         return;
  64     }
  65 #endif
  66     add_key_byte(key);
  67 }
  68
  69 void host_add_mod_bit(uint8_t mod)
  70 {
  71     keyboard_report->mods |= mod;
  72 }
  73
  74 void host_set_mods(uint8_t mods)
  75 {
  76     keyboard_report->mods = mods;
  77 }
  78
  79 void host_add_code(uint8_t code)
  80 {
  81     if (IS_MOD(code)) {
  82         host_add_mod_bit(MOD_BIT(code));
  83     } else {
  84         host_add_key(code);
  85     }
  86 }
  87
  88 void host_swap_keyboard_report(void)
  89 {
  90     uint8_t sreg = SREG;
  91     cli();
  92     report_keyboard_t *tmp = keyboard_report_prev;
  93     keyboard_report_prev = keyboard_report;
  94     keyboard_report = tmp;
  95     SREG = sreg;
  96 }
  97
  98 void host_clear_keyboard_report(void)
  99 {
 100     keyboard_report->mods = 0;
 101     for (int8_t i = 0; i < REPORT_KEYS; i++) {
 102         keyboard_report->keys[i] = 0;
 103     }
 104 }
 105
 106 uint8_t host_has_anykey(void)
 107 {
 108     uint8_t cnt = 0;
 109     for (int i = 0; i < REPORT_KEYS; i++) {
 110         if (keyboard_report->keys[i])
 111             cnt++;
 112     }
 113     return cnt;
 114 }
 115
 116 uint8_t host_get_first_key(void)
 117 {
 118 #ifdef NKRO_ENABLE
 119     if (keyboard_nkro) {
 120         uint8_t i = 0;
 121         for (; i < REPORT_KEYS && !keyboard_report->keys[i]; i++)
 122             ;
 123         return i<<3 | biton(keyboard_report->keys[i]);
 124     }
 125 #endif
 126     return keyboard_report->keys[0];
 127 }
 128
 129
 130 void host_send_keyboard_report(void)
 131 {
 132     if (!driver) return;
 133     (*driver->send_keyboard)(keyboard_report);
 134 }
 135
 136 void host_mouse_send(report_mouse_t *report)
 137 {
 138     if (!driver) return;
 139     (*driver->send_mouse)(report);
 140 }
 141
 142 void host_system_send(uint16_t data)
 143 {
 144     if (!driver) return;
 145     (*driver->send_system)(data);
 146 }
 147
 148 void host_consumer_send(uint16_t data)
 149 {
 150     // TODO: this is needed?
 151     static uint16_t last_data = 0;
 152     if (data == last_data) return;
 153     last_data = data;
 154
 155     if (!driver) return;
 156     (*driver->send_consumer)(data);
 157 }
 158
 159
 160 static inline void add_key_byte(uint8_t code)
 161 {
 162     // TODO: fix ugly code
 163     int8_t i = 0;
 164     int8_t empty = -1;
 165     for (; i < REPORT_KEYS; i++) {
 166         if (keyboard_report_prev->keys[i] == code) {
 167             keyboard_report->keys[i] = code;
 168             break;
 169         }
 170         if (empty == -1 &&
 171                 keyboard_report_prev->keys[i] == 0 &&
 172                 keyboard_report->keys[i] == 0) {
 173             empty = i;
 174         }
 175     }
 176     if (i == REPORT_KEYS) {
 177         if (empty != -1) {
 178             keyboard_report->keys[empty] = code;
 179         }
 180     }
 181 }
 182
 183 static inline void add_key_bit(uint8_t code)
 184 {
 185     if ((code>>3) < REPORT_KEYS) {
 186         keyboard_report->keys[code>>3] |= 1<<(code&7);
 187     } else {
 188         debug("add_key_bit: can't add: "); phex(code); debug("\n");
 189     }
 190 }