1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PCM179X ASoC codec driver
4 *
5 * Copyright (c) Amarula Solutions B.V. 2013
6 *
7 * Michael Trimarchi <michael@amarulasolutions.com>
8 */
9
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/kernel.h>
13 #include <linux/device.h>
14
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>
21 #include <linux/of.h>
22
23 #include "pcm179x.h"
24
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
30
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)
36
37 static const struct reg_default pcm179x_reg_defaults[] = {
38 { 0x10, 0xff },
39 { 0x11, 0xff },
40 { 0x12, 0x50 },
41 { 0x13, 0x00 },
42 { 0x14, 0x00 },
43 { 0x15, 0x01 },
44 { 0x16, 0x00 },
45 { 0x17, 0x00 },
46 };
47
pcm179x_accessible_reg(struct device * dev,unsigned int reg)48 static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
49 {
50 return reg >= 0x10 && reg <= 0x17;
51 }
52
pcm179x_writeable_reg(struct device * dev,unsigned int reg)53 static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
54 {
55 bool accessible;
56
57 accessible = pcm179x_accessible_reg(dev, reg);
58
59 return accessible && reg != 0x16 && reg != 0x17;
60 }
61
62 struct pcm179x_private {
63 struct regmap *regmap;
64 unsigned int format;
65 unsigned int rate;
66 };
67
pcm179x_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int format)68 static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
69 unsigned int format)
70 {
71 struct snd_soc_component *component = codec_dai->component;
72 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
73
74 priv->format = format;
75
76 return 0;
77 }
78
pcm179x_digital_mute(struct snd_soc_dai * dai,int mute)79 static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
80 {
81 struct snd_soc_component *component = dai->component;
82 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
83 int ret;
84
85 ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
86 PCM179X_MUTE_MASK, !!mute);
87 if (ret < 0)
88 return ret;
89
90 return 0;
91 }
92
pcm179x_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)93 static int pcm179x_hw_params(struct snd_pcm_substream *substream,
94 struct snd_pcm_hw_params *params,
95 struct snd_soc_dai *dai)
96 {
97 struct snd_soc_component *component = dai->component;
98 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
99 int val = 0, ret;
100
101 priv->rate = params_rate(params);
102
103 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
104 case SND_SOC_DAIFMT_RIGHT_J:
105 switch (params_width(params)) {
106 case 24:
107 case 32:
108 val = 2;
109 break;
110 case 16:
111 val = 0;
112 break;
113 default:
114 return -EINVAL;
115 }
116 break;
117 case SND_SOC_DAIFMT_I2S:
118 switch (params_width(params)) {
119 case 24:
120 case 32:
121 val = 5;
122 break;
123 case 16:
124 val = 4;
125 break;
126 default:
127 return -EINVAL;
128 }
129 break;
130 default:
131 dev_err(component->dev, "Invalid DAI format\n");
132 return -EINVAL;
133 }
134
135 val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
136
137 ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
138 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
139 if (ret < 0)
140 return ret;
141
142 return 0;
143 }
144
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,
149 };
150
151 static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
152
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,
156 pcm179x_dac_tlv),
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),
159 };
160
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-"),
166 };
167
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" },
173 };
174
175 static struct snd_soc_dai_driver pcm179x_dai = {
176 .name = "pcm179x-hifi",
177 .playback = {
178 .stream_name = "Playback",
179 .channels_min = 2,
180 .channels_max = 2,
181 .rates = SNDRV_PCM_RATE_CONTINUOUS,
182 .rate_min = 10000,
183 .rate_max = 200000,
184 .formats = PCM1792A_FORMATS, },
185 .ops = &pcm179x_dai_ops,
186 };
187
188 const struct regmap_config pcm179x_regmap_config = {
189 .reg_bits = 8,
190 .val_bits = 8,
191 .max_register = 23,
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,
196 };
197 EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
198
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),
206 .idle_bias_on = 1,
207 .use_pmdown_time = 1,
208 .endianness = 1,
209 .non_legacy_dai_naming = 1,
210 };
211
pcm179x_common_init(struct device * dev,struct regmap * regmap)212 int pcm179x_common_init(struct device *dev, struct regmap *regmap)
213 {
214 struct pcm179x_private *pcm179x;
215
216 pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
217 GFP_KERNEL);
218 if (!pcm179x)
219 return -ENOMEM;
220
221 pcm179x->regmap = regmap;
222 dev_set_drvdata(dev, pcm179x);
223
224 return devm_snd_soc_register_component(dev,
225 &soc_component_dev_pcm179x, &pcm179x_dai, 1);
226 }
227 EXPORT_SYMBOL_GPL(pcm179x_common_init);
228
229 MODULE_DESCRIPTION("ASoC PCM179X driver");
230 MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
231 MODULE_LICENSE("GPL");
232
