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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
37static 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
48static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
49{
50 return reg >= 0x10 && reg <= 0x17;
51}
52
53static 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
62struct pcm179x_private {
63 struct regmap *regmap;
64 unsigned int format;
65 unsigned int rate;
66};
67
68static 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
79static 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
93static 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
145static 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
151static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
152
153static 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
161static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
162SND_SOC_DAPM_OUTPUT("IOUTL+"),
163SND_SOC_DAPM_OUTPUT("IOUTL-"),
164SND_SOC_DAPM_OUTPUT("IOUTR+"),
165SND_SOC_DAPM_OUTPUT("IOUTR-"),
166};
167
168static 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
175static 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
188const 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};
197EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
198
199static 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
212int 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}
227EXPORT_SYMBOL_GPL(pcm179x_common_init);
228
229MODULE_DESCRIPTION("ASoC PCM179X driver");
230MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
231MODULE_LICENSE("GPL");
232
