pc_keyb.c

mesa-6.5-minigui源码

/*
 * PC/HW routine collection v1.3 for DOS/DJGPP
 *
 *  Copyright (C) 2002 - Daniel Borca
 *  Email : [e-mail]
 *  Web   : http://www.geocities.com/dborca
 */


#include <pc.h>
#include <sys/exceptn.h>
#include <sys/farptr.h>

#include "pc_hw.h"


#define KEYB_IRQ 1

#define KEY_BUFFER_SIZE 64

#define KB_MODIFIERS (KB_SHIFT_FLAG | KB_CTRL_FLAG | KB_ALT_FLAG | KB_LWIN_FLAG | KB_RWIN_FLAG | KB_MENU_FLAG)
#define KB_LED_FLAGS (KB_SCROLOCK_FLAG | KB_NUMLOCK_FLAG | KB_CAPSLOCK_FLAG)

static int keyboard_installed;

static volatile struct {
   volatile int start, end;
   volatile int key[KEY_BUFFER_SIZE];
} key_buffer;

static volatile int key_enhanced, key_pause_loop, key_shifts;
static int leds_ok = TRUE;
static int in_a_terrupt = FALSE;
static volatile char pc_key[KEY_MAX];


/* convert Allegro format scancodes into key_shifts flag bits */
static unsigned short modifier_table[KEY_MAX - KEY_MODIFIERS] = {
   KB_SHIFT_FLAG,    KB_SHIFT_FLAG,    KB_CTRL_FLAG,
   KB_CTRL_FLAG,     KB_ALT_FLAG,      KB_ALT_FLAG,
   KB_LWIN_FLAG,     KB_RWIN_FLAG,     KB_MENU_FLAG,
   KB_SCROLOCK_FLAG, KB_NUMLOCK_FLAG,  KB_CAPSLOCK_FLAG
};


/* lookup table for converting hardware scancodes into Allegro format */
static unsigned char hw_to_mycode[128] = {
   /* 0x00 */  0,              KEY_ESC,        KEY_1,          KEY_2, 
   /* 0x04 */  KEY_3,          KEY_4,          KEY_5,          KEY_6,
   /* 0x08 */  KEY_7,          KEY_8,          KEY_9,          KEY_0, 
   /* 0x0C */  KEY_MINUS,      KEY_EQUALS,     KEY_BACKSPACE,  KEY_TAB,
   /* 0x10 */  KEY_Q,          KEY_W,          KEY_E,          KEY_R, 
   /* 0x14 */  KEY_T,          KEY_Y,          KEY_U,          KEY_I,
   /* 0x18 */  KEY_O,          KEY_P,          KEY_OPENBRACE,  KEY_CLOSEBRACE, 
   /* 0x1C */  KEY_ENTER,      KEY_LCONTROL,   KEY_A,          KEY_S,
   /* 0x20 */  KEY_D,          KEY_F,          KEY_G,          KEY_H, 
   /* 0x24 */  KEY_J,          KEY_K,          KEY_L,          KEY_COLON,
   /* 0x28 */  KEY_QUOTE,      KEY_TILDE,      KEY_LSHIFT,     KEY_BACKSLASH, 
   /* 0x2C */  KEY_Z,          KEY_X,          KEY_C,          KEY_V,
   /* 0x30 */  KEY_B,          KEY_N,          KEY_M,          KEY_COMMA, 
   /* 0x34 */  KEY_STOP,       KEY_SLASH,      KEY_RSHIFT,     KEY_ASTERISK,
   /* 0x38 */  KEY_ALT,        KEY_SPACE,      KEY_CAPSLOCK,   KEY_F1, 
   /* 0x3C */  KEY_F2,         KEY_F3,         KEY_F4,         KEY_F5,
   /* 0x40 */  KEY_F6,         KEY_F7,         KEY_F8,         KEY_F9, 
   /* 0x44 */  KEY_F10,        KEY_NUMLOCK,    KEY_SCRLOCK,    KEY_7_PAD,
   /* 0x48 */  KEY_8_PAD,      KEY_9_PAD,      KEY_MINUS_PAD,  KEY_4_PAD, 
   /* 0x4C */  KEY_5_PAD,      KEY_6_PAD,      KEY_PLUS_PAD,   KEY_1_PAD,
   /* 0x50 */  KEY_2_PAD,      KEY_3_PAD,      KEY_0_PAD,      KEY_DEL_PAD, 
   /* 0x54 */  KEY_PRTSCR,     0,              KEY_BACKSLASH2, KEY_F11,
   /* 0x58 */  KEY_F12,        0,              0,              KEY_LWIN, 
   /* 0x5C */  KEY_RWIN,       KEY_MENU,       0,              0,
   /* 0x60 */  0,              0,              0,              0, 
   /* 0x64 */  0,              0,              0,              0,
   /* 0x68 */  0,              0,              0,              0, 
   /* 0x6C */  0,              0,              0,              0,
   /* 0x70 */  KEY_KANA,       0,              0,              KEY_ABNT_C1, 
   /* 0x74 */  0,              0,              0,              0,
   /* 0x78 */  0,              KEY_CONVERT,    0,              KEY_NOCONVERT, 
   /* 0x7C */  0,              KEY_YEN,       0,              0
};


/* lookup table for converting extended hardware codes into Allegro format */
static unsigned char hw_to_mycode_ex[128] = {
   /* 0x00 */  0,              KEY_ESC,        KEY_1,          KEY_2,
   /* 0x04 */  KEY_3,          KEY_4,          KEY_5,          KEY_6,
   /* 0x08 */  KEY_7,          KEY_8,          KEY_9,          KEY_0,
   /* 0x0C */  KEY_MINUS,      KEY_EQUALS,     KEY_BACKSPACE,  KEY_TAB,
   /* 0x10 */  KEY_CIRCUMFLEX, KEY_AT,         KEY_COLON2,     KEY_R,
   /* 0x14 */  KEY_KANJI,      KEY_Y,          KEY_U,          KEY_I,
   /* 0x18 */  KEY_O,          KEY_P,          KEY_OPENBRACE,  KEY_CLOSEBRACE,
   /* 0x1C */  KEY_ENTER_PAD,  KEY_RCONTROL,   KEY_A,          KEY_S,
   /* 0x20 */  KEY_D,          KEY_F,          KEY_G,          KEY_H,
   /* 0x24 */  KEY_J,          KEY_K,          KEY_L,          KEY_COLON,
   /* 0x28 */  KEY_QUOTE,      KEY_TILDE,      0,              KEY_BACKSLASH,
   /* 0x2C */  KEY_Z,          KEY_X,          KEY_C,          KEY_V,
   /* 0x30 */  KEY_B,          KEY_N,          KEY_M,          KEY_COMMA,
   /* 0x34 */  KEY_STOP,       KEY_SLASH_PAD,  0,              KEY_PRTSCR,
   /* 0x38 */  KEY_ALTGR,      KEY_SPACE,      KEY_CAPSLOCK,   KEY_F1,
   /* 0x3C */  KEY_F2,         KEY_F3,         KEY_F4,         KEY_F5,
   /* 0x40 */  KEY_F6,         KEY_F7,         KEY_F8,         KEY_F9,
   /* 0x44 */  KEY_F10,        KEY_NUMLOCK,    KEY_PAUSE,      KEY_HOME,
   /* 0x48 */  KEY_UP,         KEY_PGUP,       KEY_MINUS_PAD,  KEY_LEFT,
   /* 0x4C */  KEY_5_PAD,      KEY_RIGHT,      KEY_PLUS_PAD,   KEY_END,
   /* 0x50 */  KEY_DOWN,       KEY_PGDN,       KEY_INSERT,     KEY_DEL,
   /* 0x54 */  KEY_PRTSCR,     0,              KEY_BACKSLASH2, KEY_F11,
   /* 0x58 */  KEY_F12,        0,              0,              KEY_LWIN,
   /* 0x5C */  KEY_RWIN,       KEY_MENU,       0,              0,
   /* 0x60 */  0,              0,              0,              0,
   /* 0x64 */  0,              0,              0,              0,
   /* 0x68 */  0,              0,              0,              0,
   /* 0x6C */  0,              0,              0,              0,
   /* 0x70 */  0,              0,              0,              0,
   /* 0x74 */  0,              0,              0,              0,
   /* 0x78 */  0,              0,              0,              0,
   /* 0x7C */  0,              0,              0,              0
};


/* default mapping table for the US keyboard layout */
static unsigned short standard_key_ascii_table[KEY_MAX] = {
   /* start */       0,
   /* alphabet */    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
   /* numbers */     '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* numpad */      '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* func keys */   0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* misc chars */  27, '`', '-', '=', 8, 9, '[', ']', 13, ';', '\'', '\\', '\\', ',', '.', '/', ' ',
   /* controls */    0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* numpad */      '/', '*', '-', '+', '.', 13,
   /* modifiers */   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


/* capslock mapping table for the US keyboard layout */
static unsigned short standard_key_capslock_table[KEY_MAX] = {
   /* start */       0,
   /* alphabet */    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
   /* numbers */     '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* numpad */      '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* func keys */   0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* misc chars */  27, '`', '-', '=', 8, 9, '[', ']', 13, ';', '\'', '\\', '\\', ',', '.', '/', ' ',
   /* controls */    0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* numpad */      '/', '*', '-', '+', '.', 13,
   /* modifiers */   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


/* shifted mapping table for the US keyboard layout */
static unsigned short standard_key_shift_table[KEY_MAX] = {
   /* start */       0,
   /* alphabet */    'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
   /* numbers */     ')', '!', '@', '#', '$', '%', '^', '&', '*', '(',
   /* numpad */      '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* func keys */   0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* misc chars */  27, '~', '_', '+', 8, 9, '{', '}', 13, ':', '"', '|', '|', '<', '>', '?', ' ',
   /* controls */    0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* numpad */      '/', '*', '-', '+', '.', 13,
   /* modifiers */   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


/* ctrl+key mapping table for the US keyboard layout */
static unsigned short standard_key_control_table[KEY_MAX] = {
   /* start */       0,
   /* alphabet */    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
   /* numbers */     2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
   /* numpad */      '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
   /* func keys */   0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* misc chars */  27, 2, 2, 2, 127, 127, 2, 2, 10, 2, 2, 2, 2, 2, 2, 2, 2,
   /* controls */    0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
   /* numpad */      2, 2, 2, 2, 2, 10,
   /* modifiers */   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


/* convert numeric pad scancodes into arrow codes */
static unsigned char numlock_table[10] = {
   KEY_INSERT, KEY_END,    KEY_DOWN,   KEY_PGDN,   KEY_LEFT,
   KEY_5_PAD,  KEY_RIGHT,  KEY_HOME,   KEY_UP,     KEY_PGUP
};


/* kb_wait_for_write_ready:
 *  Wait for the keyboard controller to set the ready-for-write bit.
 */
static __inline int
kb_wait_for_write_ready (void)
{
   int timeout = 4096;

   while ((timeout > 0) && (inportb(0x64) & 2)) timeout--;

   return (timeout > 0);
}


/* kb_wait_for_read_ready:
 *  Wait for the keyboard controller to set the ready-for-read bit.
 */
static __inline int
kb_wait_for_read_ready (void)
{
   int timeout = 16384;

   while ((timeout > 0) && (!(inportb(0x64) & 1))) timeout--;

   return (timeout > 0);
}


/* kb_send_data:
 *  Sends a byte to the keyboard controller. Returns 1 if all OK.
 */
static __inline int
kb_send_data (unsigned char data)
{
   int resends = 4;
   int timeout, temp;

   do {
      if (!kb_wait_for_write_ready())
         return 0;

      outportb(0x60, data);
      timeout = 4096;

      while (--timeout > 0) {
         if (!kb_wait_for_read_ready())
            return 0;

         temp = inportb(0x60);

         if (temp == 0xFA)
            return 1;

         if (temp == 0xFE)
            break;
      }
   } while ((resends-- > 0) && (timeout > 0));

   return 0;
}


static void
update_leds (int leds)
{
   if (leds_ok) {
      if (!in_a_terrupt)
         DISABLE();

      if (!kb_send_data(0xED)) {
         kb_send_data(0xF4);
         leds_ok = FALSE;
      } else if (!kb_send_data((leds >> 8) & 7)) {
         kb_send_data(0xF4);
         leds_ok = FALSE;
      }

      if (!in_a_terrupt)
         ENABLE();
   }
} ENDOFUNC(update_leds)


static void
inject_key (int scancode)
{
   unsigned short *table;

   if ((scancode >= KEY_0_PAD) && (scancode <= KEY_9_PAD)) {