sound/soc/intel/boards/cht_bsw_nau8824.c

Source file repositories/reference/linux-study-clean/sound/soc/intel/boards/cht_bsw_nau8824.c

File Facts

System
Linux kernel
Corpus path
sound/soc/intel/boards/cht_bsw_nau8824.c
Extension
.c
Size
8570 bytes
Lines
309
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cht_mc_private {
	struct snd_soc_jack jack;
};

static struct snd_soc_jack_pin cht_bsw_jack_pins[] = {
	{
		.pin = "Headphone",
		.mask = SND_JACK_HEADPHONE,
	},
	{
		.pin = "Headset Mic",
		.mask = SND_JACK_MICROPHONE,
	},
};

static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
};

static const struct snd_soc_dapm_route cht_audio_map[] = {
	{"Ext Spk", NULL, "SPKOUTL"},
	{"Ext Spk", NULL, "SPKOUTR"},
	{"Headphone", NULL, "HPOL"},
	{"Headphone", NULL, "HPOR"},
	{"MIC1", NULL, "Int Mic"},
	{"MIC2", NULL, "Int Mic"},
	{"HSMIC1", NULL, "Headset Mic"},
	{"HSMIC2", NULL, "Headset Mic"},
	{"Playback", NULL, "ssp2 Tx"},
	{"ssp2 Tx", NULL, "codec_out0"},
	{"ssp2 Tx", NULL, "codec_out1"},
	{"codec_in0", NULL, "ssp2 Rx" },
	{"codec_in1", NULL, "ssp2 Rx" },
	{"ssp2 Rx", NULL, "Capture"},
};

static const struct snd_kcontrol_new cht_mc_controls[] = {
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Int Mic"),
	SOC_DAPM_PIN_SWITCH("Ext Spk"),
};

static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
	int ret;

	ret = snd_soc_dai_set_sysclk(codec_dai, NAU8824_CLK_FLL_FS, 0,
		SND_SOC_CLOCK_IN);
	if (ret < 0) {
		dev_err(codec_dai->dev, "can't set FS clock %d\n", ret);
		return ret;
	}
	ret = snd_soc_dai_set_pll(codec_dai, 0, 0, params_rate(params),
		params_rate(params) * 256);
	if (ret < 0) {
		dev_err(codec_dai->dev, "can't set FLL: %d\n", ret);
		return ret;
	}

	return 0;
}

static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
{
	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
	struct snd_soc_jack *jack = &ctx->jack;
	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(runtime, 0);
	struct snd_soc_component *component = codec_dai->component;
	int ret, jack_type;

	/* NAU88L24 supports 4 buttons headset detection
	 * KEY_PLAYPAUSE
	 * KEY_VOICECOMMAND
	 * KEY_VOLUMEUP
	 * KEY_VOLUMEDOWN
	 */
	jack_type = SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
		SND_JACK_BTN_2 | SND_JACK_BTN_3;
	ret = snd_soc_card_jack_new_pins(runtime->card, "Headset", jack_type,
		jack, cht_bsw_jack_pins, ARRAY_SIZE(cht_bsw_jack_pins));
	if (ret) {
		dev_err(runtime->dev,
			"Headset Jack creation failed %d\n", ret);

Annotation

Implementation Notes