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19#include <linux/module.h>
20#include <linux/slab.h>
21#include <linux/kernel.h>
22#include <linux/device.h>
23
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/initval.h>
28#include <sound/soc.h>
29#include <sound/tlv.h>
30#include <linux/of.h>
31
32#include "pcm179x.h"
33
34#define PCM179X_DAC_VOL_LEFT 0x10
35#define PCM179X_DAC_VOL_RIGHT 0x11
36#define PCM179X_FMT_CONTROL 0x12
37#define PCM179X_MODE_CONTROL 0x13
38#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
39
40#define PCM179X_FMT_MASK 0x70
41#define PCM179X_FMT_SHIFT 4
42#define PCM179X_MUTE_MASK 0x01
43#define PCM179X_MUTE_SHIFT 0
44#define PCM179X_ATLD_ENABLE (1 << 7)
45
46static const struct reg_default pcm179x_reg_defaults[] = {
47 { 0x10, 0xff },
48 { 0x11, 0xff },
49 { 0x12, 0x50 },
50 { 0x13, 0x00 },
51 { 0x14, 0x00 },
52 { 0x15, 0x01 },
53 { 0x16, 0x00 },
54 { 0x17, 0x00 },
55};
56
57static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
58{
59 return reg >= 0x10 && reg <= 0x17;
60}
61
62static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
63{
64 bool accessible;
65
66 accessible = pcm179x_accessible_reg(dev, reg);
67
68 return accessible && reg != 0x16 && reg != 0x17;
69}
70
71struct pcm179x_private {
72 struct regmap *regmap;
73 unsigned int format;
74 unsigned int rate;
75};
76
77static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
78 unsigned int format)
79{
80 struct snd_soc_component *component = codec_dai->component;
81 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
82
83 priv->format = format;
84
85 return 0;
86}
87
88static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
89{
90 struct snd_soc_component *component = dai->component;
91 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
92 int ret;
93
94 ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
95 PCM179X_MUTE_MASK, !!mute);
96 if (ret < 0)
97 return ret;
98
99 return 0;
100}
101
102static int pcm179x_hw_params(struct snd_pcm_substream *substream,
103 struct snd_pcm_hw_params *params,
104 struct snd_soc_dai *dai)
105{
106 struct snd_soc_component *component = dai->component;
107 struct pcm179x_private *priv = snd_soc_component_get_drvdata(component);
108 int val = 0, ret;
109
110 priv->rate = params_rate(params);
111
112 switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
113 case SND_SOC_DAIFMT_RIGHT_J:
114 switch (params_width(params)) {
115 case 24:
116 case 32:
117 val = 2;
118 break;
119 case 16:
120 val = 0;
121 break;
122 default:
123 return -EINVAL;
124 }
125 break;
126 case SND_SOC_DAIFMT_I2S:
127 switch (params_width(params)) {
128 case 24:
129 case 32:
130 val = 5;
131 break;
132 case 16:
133 val = 4;
134 break;
135 default:
136 return -EINVAL;
137 }
138 break;
139 default:
140 dev_err(component->dev, "Invalid DAI format\n");
141 return -EINVAL;
142 }
143
144 val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;
145
146 ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
147 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
148 if (ret < 0)
149 return ret;
150
151 return 0;
152}
153
154static const struct snd_soc_dai_ops pcm179x_dai_ops = {
155 .set_fmt = pcm179x_set_dai_fmt,
156 .hw_params = pcm179x_hw_params,
157 .digital_mute = pcm179x_digital_mute,
158};
159
160static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
161
162static const struct snd_kcontrol_new pcm179x_controls[] = {
163 SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
164 PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
165 pcm179x_dac_tlv),
166 SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
167 SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
168};
169
170static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
171SND_SOC_DAPM_OUTPUT("IOUTL+"),
172SND_SOC_DAPM_OUTPUT("IOUTL-"),
173SND_SOC_DAPM_OUTPUT("IOUTR+"),
174SND_SOC_DAPM_OUTPUT("IOUTR-"),
175};
176
177static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
178 { "IOUTL+", NULL, "Playback" },
179 { "IOUTL-", NULL, "Playback" },
180 { "IOUTR+", NULL, "Playback" },
181 { "IOUTR-", NULL, "Playback" },
182};
183
184static struct snd_soc_dai_driver pcm179x_dai = {
185 .name = "pcm179x-hifi",
186 .playback = {
187 .stream_name = "Playback",
188 .channels_min = 2,
189 .channels_max = 2,
190 .rates = SNDRV_PCM_RATE_CONTINUOUS,
191 .rate_min = 10000,
192 .rate_max = 200000,
193 .formats = PCM1792A_FORMATS, },
194 .ops = &pcm179x_dai_ops,
195};
196
197const struct regmap_config pcm179x_regmap_config = {
198 .reg_bits = 8,
199 .val_bits = 8,
200 .max_register = 23,
201 .reg_defaults = pcm179x_reg_defaults,
202 .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
203 .writeable_reg = pcm179x_writeable_reg,
204 .readable_reg = pcm179x_accessible_reg,
205};
206EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
207
208static const struct snd_soc_component_driver soc_component_dev_pcm179x = {
209 .controls = pcm179x_controls,
210 .num_controls = ARRAY_SIZE(pcm179x_controls),
211 .dapm_widgets = pcm179x_dapm_widgets,
212 .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
213 .dapm_routes = pcm179x_dapm_routes,
214 .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
215 .idle_bias_on = 1,
216 .use_pmdown_time = 1,
217 .endianness = 1,
218 .non_legacy_dai_naming = 1,
219};
220
221int pcm179x_common_init(struct device *dev, struct regmap *regmap)
222{
223 struct pcm179x_private *pcm179x;
224
225 pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
226 GFP_KERNEL);
227 if (!pcm179x)
228 return -ENOMEM;
229
230 pcm179x->regmap = regmap;
231 dev_set_drvdata(dev, pcm179x);
232
233 return devm_snd_soc_register_component(dev,
234 &soc_component_dev_pcm179x, &pcm179x_dai, 1);
235}
236EXPORT_SYMBOL_GPL(pcm179x_common_init);
237
238MODULE_DESCRIPTION("ASoC PCM179X driver");
239MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
240MODULE_LICENSE("GPL");
241
