1// SPDX-License-Identifier: GPL-2.0
  2//
  3// Copyright (c) 2020 BayLibre, SAS.
  4// Author: Jerome Brunet <jbrunet@baylibre.com>
  5
  6#include <linux/bitfield.h>
  7#include <sound/pcm_params.h>
  8#include <sound/soc.h>
  9#include <sound/soc-dai.h>
 10
 11#include <dt-bindings/sound/meson-aiu.h>
 12#include "aiu.h"
 13#include "meson-codec-glue.h"
 14
 15#define CTRL_CLK_SEL		GENMASK(1, 0)
 16#define CTRL_DATA_SEL_SHIFT	4
 17#define CTRL_DATA_SEL		(0x3 << CTRL_DATA_SEL_SHIFT)
 18
 19static const char * const aiu_codec_ctrl_mux_texts[] = {
 20	"DISABLED", "PCM", "I2S",
 21};
 22
 23static int aiu_codec_ctrl_mux_put_enum(struct snd_kcontrol *kcontrol,
 24				       struct snd_ctl_elem_value *ucontrol)
 25{
 26	struct snd_soc_component *component =
 27		snd_soc_dapm_kcontrol_component(kcontrol);
 28	struct snd_soc_dapm_context *dapm =
 29		snd_soc_dapm_kcontrol_dapm(kcontrol);
 30	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 31	unsigned int mux, changed;
 32
 33	mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
 34	changed = snd_soc_component_test_bits(component, e->reg,
 35					      CTRL_DATA_SEL,
 36					      FIELD_PREP(CTRL_DATA_SEL, mux));
 37
 38	if (!changed)
 39		return 0;
 40
 41	/* Force disconnect of the mux while updating */
 42	snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
 43
 44	/* Reset the source first */
 45	snd_soc_component_update_bits(component, e->reg,
 46				      CTRL_CLK_SEL |
 47				      CTRL_DATA_SEL,
 48				      FIELD_PREP(CTRL_CLK_SEL, 0) |
 49				      FIELD_PREP(CTRL_DATA_SEL, 0));
 50
 51	/* Set the appropriate source */
 52	snd_soc_component_update_bits(component, e->reg,
 53				      CTRL_CLK_SEL |
 54				      CTRL_DATA_SEL,
 55				      FIELD_PREP(CTRL_CLK_SEL, mux) |
 56				      FIELD_PREP(CTRL_DATA_SEL, mux));
 57
 58	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
 59
 60	return 1;
 61}
 62
 63static SOC_ENUM_SINGLE_DECL(aiu_hdmi_ctrl_mux_enum, AIU_HDMI_CLK_DATA_CTRL,
 64			    CTRL_DATA_SEL_SHIFT,
 65			    aiu_codec_ctrl_mux_texts);
 66
 67static const struct snd_kcontrol_new aiu_hdmi_ctrl_mux =
 68	SOC_DAPM_ENUM_EXT("HDMI Source", aiu_hdmi_ctrl_mux_enum,
 69			  snd_soc_dapm_get_enum_double,
 70			  aiu_codec_ctrl_mux_put_enum);
 71
 72static const struct snd_soc_dapm_widget aiu_hdmi_ctrl_widgets[] = {
 73	SND_SOC_DAPM_MUX("HDMI CTRL SRC", SND_SOC_NOPM, 0, 0,
 74			 &aiu_hdmi_ctrl_mux),
 75};
 76
 77static const struct snd_soc_dai_ops aiu_codec_ctrl_input_ops = {
 78	.hw_params	= meson_codec_glue_input_hw_params,
 79	.set_fmt	= meson_codec_glue_input_set_fmt,
 80};
 81
 82static const struct snd_soc_dai_ops aiu_codec_ctrl_output_ops = {
 83	.startup	= meson_codec_glue_output_startup,
 84};
 85
 86#define AIU_CODEC_CTRL_FORMATS					\
 87	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |	\
 88	 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |	\
 89	 SNDRV_PCM_FMTBIT_S32_LE)
 90
 91#define AIU_CODEC_CTRL_STREAM(xname, xsuffix)			\
 92{								\
 93	.stream_name	= xname " " xsuffix,			\
 94	.channels_min	= 1,					\
 95	.channels_max	= 8,					\
 96	.rate_min       = 5512,					\
 97	.rate_max	= 192000,				\
 98	.formats	= AIU_CODEC_CTRL_FORMATS,		\
 99}
100
101#define AIU_CODEC_CTRL_INPUT(xname) {				\
102	.name = "CODEC CTRL " xname,				\
103	.playback = AIU_CODEC_CTRL_STREAM(xname, "Playback"),	\
104	.ops = &aiu_codec_ctrl_input_ops,			\
105	.probe = meson_codec_glue_input_dai_probe,		\
106	.remove = meson_codec_glue_input_dai_remove,		\
107}
108
109#define AIU_CODEC_CTRL_OUTPUT(xname) {				\
110	.name = "CODEC CTRL " xname,				\
111	.capture = AIU_CODEC_CTRL_STREAM(xname, "Capture"),	\
112	.ops = &aiu_codec_ctrl_output_ops,			\
113}
114
115static struct snd_soc_dai_driver aiu_hdmi_ctrl_dai_drv[] = {
116	[CTRL_I2S] = AIU_CODEC_CTRL_INPUT("HDMI I2S IN"),
117	[CTRL_PCM] = AIU_CODEC_CTRL_INPUT("HDMI PCM IN"),
118	[CTRL_OUT] = AIU_CODEC_CTRL_OUTPUT("HDMI OUT"),
119};
120
121static const struct snd_soc_dapm_route aiu_hdmi_ctrl_routes[] = {
122	{ "HDMI CTRL SRC", "I2S", "HDMI I2S IN Playback" },
123	{ "HDMI CTRL SRC", "PCM", "HDMI PCM IN Playback" },
124	{ "HDMI OUT Capture", NULL, "HDMI CTRL SRC" },
125};
126
127static int aiu_hdmi_of_xlate_dai_name(struct snd_soc_component *component,
128				      const struct of_phandle_args *args,
129				      const char **dai_name)
130{
131	return aiu_of_xlate_dai_name(component, args, dai_name, AIU_HDMI);
132}
133
134static const struct snd_soc_component_driver aiu_hdmi_ctrl_component = {
135	.name			= "AIU HDMI Codec Control",
136	.dapm_widgets		= aiu_hdmi_ctrl_widgets,
137	.num_dapm_widgets	= ARRAY_SIZE(aiu_hdmi_ctrl_widgets),
138	.dapm_routes		= aiu_hdmi_ctrl_routes,
139	.num_dapm_routes	= ARRAY_SIZE(aiu_hdmi_ctrl_routes),
140	.of_xlate_dai_name	= aiu_hdmi_of_xlate_dai_name,
141	.endianness		= 1,
142#ifdef CONFIG_DEBUG_FS
143	.debugfs_prefix		= "hdmi",
144#endif
145};
146
147int aiu_hdmi_ctrl_register_component(struct device *dev)
148{
149	return snd_soc_register_component(dev, &aiu_hdmi_ctrl_component,
150					  aiu_hdmi_ctrl_dai_drv,
151					  ARRAY_SIZE(aiu_hdmi_ctrl_dai_drv));
152}
153