sound/soc/qcom/apq8016_sbc.c

Source file repositories/reference/linux-study-clean/sound/soc/qcom/apq8016_sbc.c

File Facts

System
Linux kernel
Corpus path
sound/soc/qcom/apq8016_sbc.c
Extension
.c
Size
9699 bytes
Lines
348
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 apq8016_sbc_data {
	struct snd_soc_card card;
	void __iomem *mic_iomux;
	void __iomem *spkr_iomux;
	struct snd_soc_jack jack;
	bool jack_setup;
	int mi2s_clk_count[MI2S_COUNT];
};

#define MIC_CTRL_TER_WS_SLAVE_SEL	BIT(21)
#define MIC_CTRL_QUA_WS_SLAVE_SEL_10	BIT(17)
#define MIC_CTRL_TLMM_SCLK_EN		BIT(1)
#define	SPKR_CTL_PRI_WS_SLAVE_SEL_11	(BIT(17) | BIT(16))
#define SPKR_CTL_TLMM_MCLK_EN		BIT(1)
#define SPKR_CTL_TLMM_SCLK_EN		BIT(2)
#define SPKR_CTL_TLMM_DATA1_EN		BIT(3)
#define SPKR_CTL_TLMM_WS_OUT_SEL_MASK	GENMASK(7, 6)
#define SPKR_CTL_TLMM_WS_OUT_SEL_SEC	BIT(6)
#define SPKR_CTL_TLMM_WS_EN_SEL_MASK	GENMASK(19, 18)
#define SPKR_CTL_TLMM_WS_EN_SEL_SEC	BIT(18)
#define DEFAULT_MCLK_RATE		9600000
#define MI2S_BCLK_RATE			1536000

static struct snd_soc_jack_pin apq8016_sbc_jack_pins[] = {
	{
		.pin = "Mic Jack",
		.mask = SND_JACK_MICROPHONE,
	},
	{
		.pin = "Headphone Jack",
		.mask = SND_JACK_HEADPHONE,
	},
};

static int apq8016_dai_init(struct snd_soc_pcm_runtime *rtd, int mi2s)
{
	struct snd_soc_dai *codec_dai;
	struct snd_soc_component *component;
	struct snd_soc_card *card = rtd->card;
	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
	int i, rval;
	u32 value;

	switch (mi2s) {
	case MI2S_PRIMARY:
		writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
			pdata->spkr_iomux);
		break;

	case MI2S_QUATERNARY:
		/* Configure the Quat MI2S to TLMM */
		writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
			MIC_CTRL_TLMM_SCLK_EN,
			pdata->mic_iomux);
		break;
	case MI2S_SECONDARY:
		/* Clear TLMM_WS_OUT_SEL and TLMM_WS_EN_SEL fields */
		value = readl(pdata->spkr_iomux) &
			~(SPKR_CTL_TLMM_WS_OUT_SEL_MASK | SPKR_CTL_TLMM_WS_EN_SEL_MASK);
		/* Configure the Sec MI2S to TLMM */
		writel(value | SPKR_CTL_TLMM_MCLK_EN | SPKR_CTL_TLMM_SCLK_EN |
			SPKR_CTL_TLMM_DATA1_EN | SPKR_CTL_TLMM_WS_OUT_SEL_SEC |
			SPKR_CTL_TLMM_WS_EN_SEL_SEC, pdata->spkr_iomux);
		break;
	case MI2S_TERTIARY:
		writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
			MIC_CTRL_TLMM_SCLK_EN,
			pdata->mic_iomux);

		break;

	default:
		dev_err(card->dev, "unsupported cpu dai configuration\n");
		return -EINVAL;

	}

	if (!pdata->jack_setup) {
		struct snd_jack *jack;

		rval = snd_soc_card_jack_new_pins(card, "Headset Jack",
						  SND_JACK_HEADSET |
						  SND_JACK_HEADPHONE |
						  SND_JACK_BTN_0 | SND_JACK_BTN_1 |
						  SND_JACK_BTN_2 | SND_JACK_BTN_3 |
						  SND_JACK_BTN_4,
						  &pdata->jack,
						  apq8016_sbc_jack_pins,
						  ARRAY_SIZE(apq8016_sbc_jack_pins));

Annotation

Implementation Notes