void
kbdenable(int mode) /* 1: interrupt, 0: poll */
{
intio_set_sysport_keyctrl(8);
mfp_bit_clear_iera(MFP_INTR_RCV_FULL | MFP_INTR_TIMER_B);
mfp_set_tbcr(MFP_TIMERB_RESET | MFP_TIMERB_STOP);
mfp_set_tbdr(13); /* Timer B interrupt interval */
mfp_set_tbcr(1); /* 1/4 delay mode */
mfp_set_ucr(MFP_UCR_CLKX16 | MFP_UCR_RW_8 | MFP_UCR_ONESB);
mfp_set_rsr(MFP_RSR_RE); /* USART receive enable */
mfp_set_tsr(MFP_TSR_TE); /* USART transmit enable */
if (mode) {
mfp_bit_set_iera(MFP_INTR_RCV_FULL);
/*
* Perform null read in case that an input byte is in the
* receiver buffer, which prevents further interrupts.
* We could save the input, but probably not so valuable.
*/
(void) mfp_get_udr();
}
kbdled = 0; /* all keyboard LED turn off. */
kbd_setLED();
if (!(intio_get_sysport_keyctrl() & 8))
aprint_normal(" (no connected keyboard)");
}
static void
mfp_init(void)
{
mfp_set_vr(MFP_INTR);
/* stop all interrupts */
mfp_set_iera(0);
mfp_set_ierb(0);
/* make MSCTRL 'High', XXX where should I do it? */
mfp_send_usart(0x41);
/* Timer A settings */
mfp_set_tacr(MFP_TIMERA_RESET | MFP_TIMERA_STOP);
/* Timer B settings: used for USART clock */
mfp_set_tbcr(MFP_TIMERB_RESET | MFP_TIMERB_STOP);
/* Timer C/D settings */
mfp_set_tcdcr(0);
}
