Function codec_attach

freebsd/mips/ingenic/jz4780_codec.c:219–279

}

static int
codec_attach(device_t dev)
{
	struct codec_softc *sc;
	uint8_t reg;

	sc = device_get_softc(dev);
	sc->dev = dev;

	if (bus_alloc_resources(dev, codec_spec, sc->res)) {
		device_printf(dev, "could not allocate resources for device\n");
		return (ENXIO);
	}

	/* Memory interface */
	sc->bst = rman_get_bustag(sc->res[0]);
	sc->bsh = rman_get_bushandle(sc->res[0]);

	if (clk_get_by_ofw_name(dev, 0, "i2s", &sc->clk) != 0) {
		device_printf(dev, "could not get i2s clock\n");
		bus_release_resources(dev, codec_spec, sc->res);
		return (ENXIO);
	}

	/* Initialize codec. */
	reg = codec_read(sc, CR_VIC);
	reg &= ~(VIC_SB_SLEEP | VIC_SB);
	codec_write(sc, CR_VIC, reg);

	DELAY(20000);

	reg = codec_read(sc, CR_DAC);
	reg &= ~(DAC_SB | DAC_MUTE);
	codec_write(sc, CR_DAC, reg);

	DELAY(10000);

	/* I2S, 16-bit, 48 kHz. */
	reg = codec_read(sc, AICR_DAC);
	reg &= ~(AICR_DAC_SB | DAC_ADWL_M);
	reg |= DAC_ADWL_16;
	reg &= ~(AUDIOIF_M);
	reg |= AUDIOIF_I2S;
	codec_write(sc, AICR_DAC, reg);

	DELAY(10000);

	reg = FCR_DAC_48;
	codec_write(sc, FCR_DAC, reg);

	DELAY(10000);

	/* Unmute headphones. */
	reg = codec_read(sc, CR_HP);
	reg &= ~(HP_SB | HP_MUTE);
	codec_write(sc, CR_HP, reg);

	ci20_hp_unmute(sc);