static void lmc1992_init(void)
{
if (!has_microwire)
return;
/*
* According to Atari documentation, it takes approximately 16
* microseconds to send the data (16 bits including don't cares),
* so the time to shift the mask/data by 1 bit is approximately
* 1 microsecond. Therefore we need to delay at least this much
* before checking to see if the shift is complete.
* Note that delay values at LMC1992 initialisation time are not yet
* calibrated. So, for safety, we set the delay to 2 microseconds.
*/
loopcount_mw = loopcount_1_msec * 2 / 1000; /* 2 microseconds */
DMASOUND->microwire_mask = MICROWIRE_MASK;
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_VOLUME, LMC1992_VOLUME(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_LEFT_FRONT_FADER, LMC1992_FADER(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_RIGHT_FRONT_FADER, LMC1992_FADER(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_TREBLE, LMC1992_TONE(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_BASS, LMC1992_TONE(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_INPUT_SELECT, LMC1992_INPUT_1));
}
static void lmc1992_init(void)
{
if (!has_microwire)
return;
DMASOUND->microwire_mask = MICROWIRE_MASK;
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_VOLUME, LMC1992_VOLUME(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_LEFT_FRONT_FADER, LMC1992_FADER(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_RIGHT_FRONT_FADER, LMC1992_FADER(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_TREEBLE, LMC1992_TONE(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_BASS, LMC1992_TONE(0)));
write_microwire(LMC1992_COMMAND(LMC1992_FUNCTION_INPUT_SELECT, LMC1992_INPUT_1));
}
