/**
* \brief Initialize and configure the I2S module.
*
* \param dev_inst Device structure pointer.
* \param i2sc Base address of the I2SC instance.
* \param cfg Pointer to I2S configuration.
*
* \return status
*/
enum status_code i2s_init(struct i2s_dev_inst *const dev_inst, I2sc *i2sc,
struct i2s_config *const cfg)
{
/* Sanity check arguments */
Assert(dev_inst);
Assert(i2sc);
Assert(cfg);
dev_inst->hw_dev = i2sc;
dev_inst->cfg = cfg;
/* Enable PMC clock for I2SC */
#ifdef ID_I2SC1
if (dev_inst->hw_dev == I2SC1) {
sysclk_enable_peripheral_clock(ID_I2SC1);
} else
#endif
#ifdef ID_I2SC0
if (dev_inst->hw_dev == I2SC0) {
sysclk_enable_peripheral_clock(ID_I2SC0);
} else
#endif
{
Assert(false);
}
i2s_reset(dev_inst);
return _i2s_set_config(dev_inst);
}
/*
* Initialise the PP I2C and I2S.
*/
void audiohw_init(void)
{
#ifdef CPU_PP502x
/* normal outputs for CDI and I2S pin groups */
DEV_INIT2 &= ~0x300;
/*mini2?*/
DEV_INIT1 &=~0x3000000;
/*mini2?*/
/* I2S device reset */
DEV_RS |= DEV_I2S;
DEV_RS &=~DEV_I2S;
/* I2S device enable */
DEV_EN |= DEV_I2S;
/* enable external dev clock clocks */
DEV_EN |= DEV_EXTCLOCKS;
/* external dev clock to 24MHz */
outl(inl(0x70000018) & ~0xc, 0x70000018);
#else
/* device reset */
outl(inl(0xcf005030) | 0x80, 0xcf005030);
outl(inl(0xcf005030) & ~0x80, 0xcf005030);
/* device enable */
outl(inl(0xcf005000) | 0x80, 0xcf005000);
/* GPIO D06 enable for output */
outl(inl(0xcf00000c) | 0x40, 0xcf00000c);
outl(inl(0xcf00001c) & ~0x40, 0xcf00001c);
#ifdef IPOD_1G2G
/* bits 11,10 == 10 */
outl(inl(0xcf004040) & ~0x400, 0xcf004040);
outl(inl(0xcf004040) | 0x800, 0xcf004040);
#else /* IPOD_3G */
/* bits 11,10 == 01 */
outl(inl(0xcf004040) | 0x400, 0xcf004040);
outl(inl(0xcf004040) & ~0x800, 0xcf004040);
outl(inl(0xcf004048) & ~0x1, 0xcf004048);
outl(inl(0xcf000004) & ~0xf, 0xcf000004);
outl(inl(0xcf004044) & ~0xf, 0xcf004044);
/* C03 = 0 */
outl(inl(0xcf000008) | 0x8, 0xcf000008);
outl(inl(0xcf000018) | 0x8, 0xcf000018);
outl(inl(0xcf000028) & ~0x8, 0xcf000028);
#endif /* IPOD_1G2G/3G */
#endif
/* reset the I2S controller into known state */
i2s_reset();
audiohw_preinit();
}
