/* Configure channel ownership */
static void set_channel_ownership(unsigned int channel, unsigned int config)
{
unsigned long bit = 1ul << channel;
/* DSP side */
#if 0 /* Not using this */
bitmod32(&SDMA_DSPOVR, (config & CH_OWNSHP_DSP) ? 0 : bit, bit);
#endif
/* Event */
bitmod32(&SDMA_EVTOVR, (config & CH_OWNSHP_EVT) ? 0 : bit, bit);
/* MCU side */
bitmod32(&SDMA_HOSTOVR, (config & CH_OWNSHP_MCU) ? 0 : bit, bit);
}
void pcm_dma_apply_settings(void)
{
bitmod32(&CGU_AUDIO,
(0<<24) | /* I2SI_MCLK2PAD_EN = disabled */
(0<<23) | /* I2SI_MCLK_EN = disabled */
(0<<14) | /* I2SI_MCLK_DIV_SEL = unused */
(0<<12) | /* I2SI_MCLK_SEL = clk_main */
/* I2SO_MCLK_EN = unchanged */
(mclk_divider() << 2) | /* I2SO_MCLK_DIV_SEL */
(AS3525_MCLK_SEL << 0), /* I2SO_MCLK_SEL */
0x01fff7ff);
}
/* Helper to update the power button status */
static void power_button_update(bool pressed)
{
bitmod32(&ext_btn, pressed ? BUTTON_POWER : 0, BUTTON_POWER);
}