-
-
-/******************************************************************************/
-
-static void kbd_conv_char(unsigned char scan_code)
-{
- if (scan_code == 0xe0) {
- kbd_flags |= EXT;
- return;
- }
-
- /* if high bit of scan_code, set break flag */
- if (scan_code & 0x80)
- kbd_flags |= BRK;
- else
- kbd_flags &= ~BRK;
-
- if ((scan_code == 0xe1) || (kbd_flags & E1)) {
- if (scan_code == 0xe1) {
- kbd_flags ^= BRK; /* reset the break flag */
- kbd_flags ^= E1; /* bitwise EXOR with E1 flag */
- }
- return;
- }
-
- scan_code &= 0x7f;
-
- if (kbd_flags & EXT) {
- int i;
-
- kbd_flags ^= EXT;
- for (i = 0; ext_key_map[i]; i++) {
- if (ext_key_map[i] == scan_code) {
- scan_code = 0x80 + i;
- break;
- }
- }
- /* not found ? */
- if (!ext_key_map[i])
- return;
- }
-
- switch (kbd_fct_map[scan_code]) {
- case AS:
- kbd_normal(scan_code);
- break;
- case SH:
- kbd_shift(scan_code);
- break;
- case CN:
- kbd_ctrl(scan_code);
- break;
- case NM:
- kbd_num(scan_code);
- break;
- case CP:
- kbd_caps(scan_code);
- break;
- case ST:
- kbd_scroll(scan_code);
- break;
- case AK:
- kbd_alt(scan_code);
- break;
- }
- return;
-}
-
-
-/******************************************************************************/
-
-static void kbd_normal(unsigned char scan_code)
-{
- unsigned char chr;
-
- if ((kbd_flags & BRK) == NORMAL) {
- chr = kbd_key_map[kbd_mapping][kbd_state][scan_code];
- if ((chr == 0xff) || (chr == 0x00))
- return;
-
- /* if caps lock convert upper to lower */
- if (((kbd_flags & CAPS) == CAPS) &&
- (chr >= 'a' && chr <= 'z')) {
- chr -= 'a' - 'A';
- }
- kbd_input = chr;
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_shift(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == BRK) {
- kbd_state = AS;
- kbd_flags &= (~SHIFT);
- } else {
- kbd_state = SH;
- kbd_flags |= SHIFT;
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_ctrl(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == BRK) {
- kbd_state = AS;
- kbd_flags &= (~CTRL);
- } else {
- kbd_state = CN;
- kbd_flags |= CTRL;
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_caps(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == NORMAL) {
- kbd_flags ^= CAPS;
- kbd_led_set(); /* update keyboard LED */
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_num(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == NORMAL) {
- kbd_flags ^= NUM;
- kbd_state = (kbd_flags & NUM) ? AS : NM;
- kbd_led_set(); /* update keyboard LED */
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_scroll(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == NORMAL) {
- kbd_flags ^= STP;
- kbd_led_set(); /* update keyboard LED */
- if (kbd_flags & STP)
- kbd_input = 0x13;
- else
- kbd_input = 0x11;
- }
-}
-
-/******************************************************************************/
-
-static void kbd_alt(unsigned char scan_code)
-{
- if ((kbd_flags & BRK) == BRK) {
- kbd_state = AS;
- kbd_flags &= (~ALT);
- } else {
- kbd_state = AK;
- kbd_flags &= ALT;
- }
-}
-
-
-/******************************************************************************/
-
-static void kbd_led_set(void)
-{
- kbd_input_empty();
- out8(I8042_DATA_REG, 0xed); /* SET LED command */
- kbd_input_empty();
- out8(I8042_DATA_REG, (kbd_flags & 0x7)); /* LED bits only */
-}
-
-
-/******************************************************************************/
-
-static int kbd_input_empty(void)
-{
- int kbdTimeout = KBD_TIMEOUT * 1000;
-
- while ((in8(I8042_STATUS_REG) & I8042_STATUS_IN_DATA) && kbdTimeout--)
- udelay(1);
-
- return kbdTimeout != -1;
-}
-
-/******************************************************************************/
-
-static int wait_until_kbd_output_full(void)
-{
- int kbdTimeout = KBD_TIMEOUT * 1000;
-
- while (((in8(I8042_STATUS_REG) & 0x01) == 0) && kbdTimeout--)
- udelay(1);
-
- return kbdTimeout != -1;
-}
-
-/******************************************************************************/
-
-static int kbd_reset(void)
-{
- /* KB Reset */
- if (kbd_input_empty() == 0)
- return -1;
-
- out8(I8042_DATA_REG, 0xff);
-
- if (wait_until_kbd_output_full() == 0)
- return -1;
-
- if (in8(I8042_DATA_REG) != 0xfa) /* ACK */
- return -1;
-
- if (wait_until_kbd_output_full() == 0)
- return -1;
-
- if (in8(I8042_DATA_REG) != 0xaa) /* Test Pass*/
- return -1;
-
- if (kbd_input_empty() == 0)
- return -1;
-
- /* Set KBC mode */
- out8(I8042_COMMAND_REG, 0x60);
-
- if (kbd_input_empty() == 0)
- return -1;
-
- out8(I8042_DATA_REG, 0x45);
-
- if (kbd_input_empty() == 0)
- return -1;
-
- /* Enable Keyboard */
- out8(I8042_COMMAND_REG, 0xae);
- if (kbd_input_empty() == 0)
- return -1;
-
- out8(I8042_COMMAND_REG, 0x60);
- if (kbd_input_empty() == 0)
- return -1;
-
- out8(I8042_DATA_REG, 0xf4);
- if (kbd_input_empty() == 0)
- return -1;
-
- return 0;
-}