1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PCM179X ASoC codec driver
5 * Copyright (c) Amarula Solutions B.V. 2013
7 * Michael Trimarchi <michael@amarulasolutions.com>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/kernel.h>
13 #include <linux/device.h>
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/pcm_params.h>
18 #include <sound/initval.h>
19 #include <sound/soc.h>
20 #include <sound/tlv.h>
25 #define PCM179X_DAC_VOL_LEFT 0x10
26 #define PCM179X_DAC_VOL_RIGHT 0x11
27 #define PCM179X_FMT_CONTROL 0x12
28 #define PCM179X_MODE_CONTROL 0x13
29 #define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
31 #define PCM179X_FMT_MASK 0x70
32 #define PCM179X_FMT_SHIFT 4
33 #define PCM179X_MUTE_MASK 0x01
34 #define PCM179X_MUTE_SHIFT 0
35 #define PCM179X_ATLD_ENABLE (1 << 7)
37 static const struct reg_default pcm179x_reg_defaults[] = {
48 static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
50 return reg >= 0x10 && reg <= 0x17;
53 static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
57 accessible = pcm179x_accessible_reg(dev, reg);
59 return accessible && reg != 0x16 && reg != 0x17;
62 struct pcm179x_private {
63 struct regmap *regmap;
68 static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
71 struct snd_soc_component *component = codec_dai->component;
72 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
74 priv->format = format;
79 static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
81 struct snd_soc_component *component = dai->component;
82 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
85 ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
86 PCM179X_MUTE_MASK, !!mute);
93 static int pcm179x_hw_params(struct snd_pcm_substream *substream,
94 struct snd_pcm_hw_params *params,
95 struct snd_soc_dai *dai)
97 struct snd_soc_component *component = dai->component;
98 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
101 priv->rate = params_rate(params);
103 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
104 case SND_SOC_DAIFMT_RIGHT_J:
105 switch (params_width(params)) {
117 case SND_SOC_DAIFMT_I2S:
118 switch (params_width(params)) {
131 dev_err(component->dev, "Invalid DAI format\n");
135 val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
137 ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
138 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
145 static const struct snd_soc_dai_ops pcm179x_dai_ops = {
146 .set_fmt = pcm179x_set_dai_fmt,
147 .hw_params = pcm179x_hw_params,
148 .digital_mute = pcm179x_digital_mute,
151 static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
153 static const struct snd_kcontrol_new pcm179x_controls[] = {
154 SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
155 PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
157 SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
158 SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
161 static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
162 SND_SOC_DAPM_OUTPUT("IOUTL+"),
163 SND_SOC_DAPM_OUTPUT("IOUTL-"),
164 SND_SOC_DAPM_OUTPUT("IOUTR+"),
165 SND_SOC_DAPM_OUTPUT("IOUTR-"),
168 static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
169 { "IOUTL+", NULL, "Playback" },
170 { "IOUTL-", NULL, "Playback" },
171 { "IOUTR+", NULL, "Playback" },
172 { "IOUTR-", NULL, "Playback" },
175 static struct snd_soc_dai_driver pcm179x_dai = {
176 .name = "pcm179x-hifi",
178 .stream_name = "Playback",
181 .rates = SNDRV_PCM_RATE_CONTINUOUS,
184 .formats = PCM1792A_FORMATS, },
185 .ops = &pcm179x_dai_ops,
188 const struct regmap_config pcm179x_regmap_config = {
192 .reg_defaults = pcm179x_reg_defaults,
193 .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
194 .writeable_reg = pcm179x_writeable_reg,
195 .readable_reg = pcm179x_accessible_reg,
197 EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
199 static const struct snd_soc_component_driver soc_component_dev_pcm179x = {
200 .controls = pcm179x_controls,
201 .num_controls = ARRAY_SIZE(pcm179x_controls),
202 .dapm_widgets = pcm179x_dapm_widgets,
203 .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
204 .dapm_routes = pcm179x_dapm_routes,
205 .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
207 .use_pmdown_time = 1,
209 .non_legacy_dai_naming = 1,
212 int pcm179x_common_init(struct device *dev, struct regmap *regmap)
214 struct pcm179x_private *pcm179x;
216 pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
221 pcm179x->regmap = regmap;
222 dev_set_drvdata(dev, pcm179x);
224 return devm_snd_soc_register_component(dev,
225 &soc_component_dev_pcm179x, &pcm179x_dai, 1);
227 EXPORT_SYMBOL_GPL(pcm179x_common_init);
229 MODULE_DESCRIPTION("ASoC PCM179X driver");
230 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
231 MODULE_LICENSE("GPL");