1 files changed, 203 insertions, 0 deletions
diff --git a/sound/soc/meson/aiu-acodec-ctrl.c b/sound/soc/meson/aiu-acodec-ctrl.c
new file mode 100644
index 000000000..e11b6a5cd
--- /dev/null
+++ b/sound/soc/meson/aiu-acodec-ctrl.c
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2020 BayLibre, SAS.
+// Author: Jerome Brunet <jbrunet@baylibre.com>
+
+#include <linux/bitfield.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include <dt-bindings/sound/meson-aiu.h>
+#include "aiu.h"
+#include "meson-codec-glue.h"
+
+#define CTRL_DIN_EN			15
+#define CTRL_CLK_INV			BIT(14)
+#define CTRL_LRCLK_INV			BIT(13)
+#define CTRL_I2S_IN_BCLK_SRC		BIT(11)
+#define CTRL_DIN_LRCLK_SRC_SHIFT	6
+#define CTRL_DIN_LRCLK_SRC		(0x3 << CTRL_DIN_LRCLK_SRC_SHIFT)
+#define CTRL_BCLK_MCLK_SRC		GENMASK(5, 4)
+#define CTRL_DIN_SKEW			GENMASK(3, 2)
+#define CTRL_I2S_OUT_LANE_SRC		0
+
+#define AIU_ACODEC_OUT_CHMAX		2
+
+static const char * const aiu_acodec_ctrl_mux_texts[] = {
+	"DISABLED", "I2S", "PCM",
+};
+
+static int aiu_acodec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
+					struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+		snd_soc_dapm_kcontrol_component(kcontrol);
+	struct snd_soc_dapm_context *dapm =
+		snd_soc_dapm_kcontrol_dapm(kcontrol);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int mux, changed;
+
+	mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
+	changed = snd_soc_component_test_bits(component, e->reg,
+					      CTRL_DIN_LRCLK_SRC,
+					      FIELD_PREP(CTRL_DIN_LRCLK_SRC,
+							 mux));
+
+	if (!changed)
+		return 0;
+
+	/* Force disconnect of the mux while updating */
+	snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
+
+	snd_soc_component_update_bits(component, e->reg,
+				      CTRL_DIN_LRCLK_SRC |
+				      CTRL_BCLK_MCLK_SRC,
+				      FIELD_PREP(CTRL_DIN_LRCLK_SRC, mux) |
+				      FIELD_PREP(CTRL_BCLK_MCLK_SRC, mux));
+
+	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
+
+	return 1;
+}
+
+static SOC_ENUM_SINGLE_DECL(aiu_acodec_ctrl_mux_enum, AIU_ACODEC_CTRL,
+			    CTRL_DIN_LRCLK_SRC_SHIFT,
+			    aiu_acodec_ctrl_mux_texts);
+
+static const struct snd_kcontrol_new aiu_acodec_ctrl_mux =
+	SOC_DAPM_ENUM_EXT("ACodec Source", aiu_acodec_ctrl_mux_enum,
+			  snd_soc_dapm_get_enum_double,
+			  aiu_acodec_ctrl_mux_put_enum);
+
+static const struct snd_kcontrol_new aiu_acodec_ctrl_out_enable =
+	SOC_DAPM_SINGLE_AUTODISABLE("Switch", AIU_ACODEC_CTRL,
+				    CTRL_DIN_EN, 1, 0);
+
+static const struct snd_soc_dapm_widget aiu_acodec_ctrl_widgets[] = {
+	SND_SOC_DAPM_MUX("ACODEC SRC", SND_SOC_NOPM, 0, 0,
+			 &aiu_acodec_ctrl_mux),
+	SND_SOC_DAPM_SWITCH("ACODEC OUT EN", SND_SOC_NOPM, 0, 0,
+			    &aiu_acodec_ctrl_out_enable),
+};
+
+static int aiu_acodec_ctrl_input_hw_params(struct snd_pcm_substream *substream,
+					   struct snd_pcm_hw_params *params,
+					   struct snd_soc_dai *dai)
+{
+	struct meson_codec_glue_input *data;
+	int ret;
+
+	ret = meson_codec_glue_input_hw_params(substream, params, dai);
+	if (ret)
+		return ret;
+
+	/* The glue will provide 1 lane out of the 4 to the output */
+	data = meson_codec_glue_input_get_data(dai);
+	data->params.channels_min = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
+					  data->params.channels_min);
+	data->params.channels_max = min_t(unsigned int, AIU_ACODEC_OUT_CHMAX,
+					  data->params.channels_max);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops aiu_acodec_ctrl_input_ops = {
+	.hw_params	= aiu_acodec_ctrl_input_hw_params,
+	.set_fmt	= meson_codec_glue_input_set_fmt,
+};
+
+static const struct snd_soc_dai_ops aiu_acodec_ctrl_output_ops = {
+	.startup	= meson_codec_glue_output_startup,
+};
+
+#define AIU_ACODEC_CTRL_FORMATS					\
+	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |	\
+	 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |	\
+	 SNDRV_PCM_FMTBIT_S32_LE)
+
+#define AIU_ACODEC_STREAM(xname, xsuffix, xchmax)		\
+{								\
+	.stream_name	= xname " " xsuffix,			\
+	.channels_min	= 1,					\
+	.channels_max	= (xchmax),				\
+	.rate_min       = 5512,					\
+	.rate_max	= 192000,				\
+	.formats	= AIU_ACODEC_CTRL_FORMATS,		\
+}
+
+#define AIU_ACODEC_INPUT(xname) {				\
+	.name = "ACODEC CTRL " xname,				\
+	.playback = AIU_ACODEC_STREAM(xname, "Playback", 8),	\
+	.ops = &aiu_acodec_ctrl_input_ops,			\
+	.probe = meson_codec_glue_input_dai_probe,		\
+	.remove = meson_codec_glue_input_dai_remove,		\
+}
+
+#define AIU_ACODEC_OUTPUT(xname) {				\
+	.name = "ACODEC CTRL " xname,				\
+	.capture = AIU_ACODEC_STREAM(xname, "Capture", AIU_ACODEC_OUT_CHMAX), \
+	.ops = &aiu_acodec_ctrl_output_ops,			\
+}
+
+static struct snd_soc_dai_driver aiu_acodec_ctrl_dai_drv[] = {
+	[CTRL_I2S] = AIU_ACODEC_INPUT("ACODEC I2S IN"),
+	[CTRL_PCM] = AIU_ACODEC_INPUT("ACODEC PCM IN"),
+	[CTRL_OUT] = AIU_ACODEC_OUTPUT("ACODEC OUT"),
+};
+
+static const struct snd_soc_dapm_route aiu_acodec_ctrl_routes[] = {
+	{ "ACODEC SRC", "I2S", "ACODEC I2S IN Playback" },
+	{ "ACODEC SRC", "PCM", "ACODEC PCM IN Playback" },
+	{ "ACODEC OUT EN", "Switch", "ACODEC SRC" },
+	{ "ACODEC OUT Capture", NULL, "ACODEC OUT EN" },
+};
+
+static const struct snd_kcontrol_new aiu_acodec_ctrl_controls[] = {
+	SOC_SINGLE("ACODEC I2S Lane Select", AIU_ACODEC_CTRL,
+		   CTRL_I2S_OUT_LANE_SRC, 3, 0),
+};
+
+static int aiu_acodec_of_xlate_dai_name(struct snd_soc_component *component,
+					struct of_phandle_args *args,
+					const char **dai_name)
+{
+	return aiu_of_xlate_dai_name(component, args, dai_name, AIU_ACODEC);
+}
+
+static int aiu_acodec_ctrl_component_probe(struct snd_soc_component *component)
+{
+	/*
+	 * NOTE: Din Skew setting
+	 * According to the documentation, the following update adds one delay
+	 * to the din line. Without this, the output saturates. This happens
+	 * regardless of the link format (i2s or left_j) so it is not clear what
+	 * it actually does but it seems to be required
+	 */
+	snd_soc_component_update_bits(component, AIU_ACODEC_CTRL,
+				      CTRL_DIN_SKEW,
+				      FIELD_PREP(CTRL_DIN_SKEW, 2));
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver aiu_acodec_ctrl_component = {
+	.name			= "AIU Internal DAC Codec Control",
+	.probe			= aiu_acodec_ctrl_component_probe,
+	.controls		= aiu_acodec_ctrl_controls,
+	.num_controls		= ARRAY_SIZE(aiu_acodec_ctrl_controls),
+	.dapm_widgets		= aiu_acodec_ctrl_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(aiu_acodec_ctrl_widgets),
+	.dapm_routes		= aiu_acodec_ctrl_routes,
+	.num_dapm_routes	= ARRAY_SIZE(aiu_acodec_ctrl_routes),
+	.of_xlate_dai_name	= aiu_acodec_of_xlate_dai_name,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+int aiu_acodec_ctrl_register_component(struct device *dev)
+{
+	return snd_soc_register_component(dev, &aiu_acodec_ctrl_component,
+					  aiu_acodec_ctrl_dai_drv,
+					  ARRAY_SIZE(aiu_acodec_ctrl_dai_drv));
+}