drivers/input/keyboard.c

   1 /***********************************************************************
   2  *
   3  * (C) Copyright 2004
   4  * DENX Software Engineering
   5  * Wolfgang Denk, wd@denx.de
   6  *
   7  * Keyboard driver
   8  *
   9  ***********************************************************************/
  10
  11 #include <common.h>
  12 #include <console.h>
  13 #include <input.h>
  14
  15 #include <stdio_dev.h>
  16 #include <keyboard.h>
  17 #include <stdio_dev.h>
  18
  19 static struct input_config config;
  20
  21 static int kbd_read_keys(struct input_config *config)
  22 {
  23 #if defined(CONFIG_ARCH_MPC8540) || \
  24                 defined(CONFIG_ARCH_MPC8541) || defined(CONFIG_ARCH_MPC8555)
  25         /* no ISR is used, so received chars must be polled */
  26         ps2ser_check();
  27 #endif
  28
  29         return 1;
  30 }
  31
  32 static int check_leds(int ret)
  33 {
  34         int leds;
  35
  36         leds = input_leds_changed(&config);
  37         if (leds >= 0)
  38                 pckbd_leds(leds);
  39
  40         return ret;
  41 }
  42
  43 /* test if a character is in the queue */
  44 static int kbd_testc(struct stdio_dev *dev)
  45 {
  46         return check_leds(input_tstc(&config));
  47 }
  48
  49 /* gets the character from the queue */
  50 static int kbd_getc(struct stdio_dev *dev)
  51 {
  52         return check_leds(input_getc(&config));
  53 }
  54
  55 void handle_scancode(unsigned char scan_code)
  56 {
  57         bool release = false;
  58
  59         /* Compare with i8042_kbd_check() in i8042.c if some logic is missing */
  60         if (scan_code & 0x80) {
  61                 scan_code &= 0x7f;
  62                 release = true;
  63         }
  64
  65         input_add_keycode(&config, scan_code, release);
  66 }
  67
  68 /* TODO: convert to driver model */
  69 int kbd_init (void)
  70 {
  71         struct stdio_dev kbddev;
  72         struct input_config *input = &config;
  73
  74         if(kbd_init_hw()==-1)
  75                 return -1;
  76         memset (&kbddev, 0, sizeof(kbddev));
  77         strcpy(kbddev.name, "kbd");
  78         kbddev.flags =  DEV_FLAGS_INPUT;
  79         kbddev.getc = kbd_getc;
  80         kbddev.tstc = kbd_testc;
  81
  82         input_init(input, 0);
  83         input->read_keys = kbd_read_keys;
  84         input_add_tables(input, true);
  85
  86         return input_stdio_register(&kbddev);
  87 }