1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
4 *
5 * Copyright (C) 2012 Innovative Converged Devices(ICD)
6 * Copyright (C) 2013 Andrey Smirnov
7 *
8 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
9 */
10
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <sound/pcm.h>
14 #include <sound/pcm_params.h>
15 #include <linux/regmap.h>
16 #include <sound/soc.h>
17 #include <sound/initval.h>
18
19 #include <linux/i2c.h>
20
21 #include <linux/mfd/si476x-core.h>
22
23 enum si476x_audio_registers {
24 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
25 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
26 };
27
28 enum si476x_digital_io_output_format {
29 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
30 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
31 };
32
33 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
34 (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
35 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e)
36
37 enum si476x_daudio_formats {
38 SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
39 SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
40 SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
41 SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
42 SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
43
44 SI476X_DAUDIO_MODE_IB = (1 << 5),
45 SI476X_DAUDIO_MODE_IF = (1 << 6),
46 };
47
48 enum si476x_pcm_format {
49 SI476X_PCM_FORMAT_S8 = 2,
50 SI476X_PCM_FORMAT_S16_LE = 4,
51 SI476X_PCM_FORMAT_S20_3LE = 5,
52 SI476X_PCM_FORMAT_S24_LE = 6,
53 };
54
55 static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
56 SND_SOC_DAPM_OUTPUT("LOUT"),
57 SND_SOC_DAPM_OUTPUT("ROUT"),
58 };
59
60 static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
61 { "Capture", NULL, "LOUT" },
62 { "Capture", NULL, "ROUT" },
63 };
64
65 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
66 unsigned int fmt)
67 {
68 struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
69 int err;
70 u16 format = 0;
71
72 if ((fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC)
73 return -EINVAL;
74
75 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
76 case SND_SOC_DAIFMT_DSP_A:
77 format |= SI476X_DAUDIO_MODE_DSP_A;
78 break;
79 case SND_SOC_DAIFMT_DSP_B:
80 format |= SI476X_DAUDIO_MODE_DSP_B;
81 break;
82 case SND_SOC_DAIFMT_I2S:
83 format |= SI476X_DAUDIO_MODE_I2S;
84 break;
85 case SND_SOC_DAIFMT_RIGHT_J:
86 format |= SI476X_DAUDIO_MODE_RIGHT_J;
87 break;
88 case SND_SOC_DAIFMT_LEFT_J:
89 format |= SI476X_DAUDIO_MODE_LEFT_J;
90 break;
91 default:
92 return -EINVAL;
93 }
94
95 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
96 case SND_SOC_DAIFMT_DSP_A:
97 case SND_SOC_DAIFMT_DSP_B:
98 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
99 case SND_SOC_DAIFMT_NB_NF:
100 break;
101 case SND_SOC_DAIFMT_IB_NF:
102 format |= SI476X_DAUDIO_MODE_IB;
103 break;
104 default:
105 return -EINVAL;
106 }
107 break;
108 case SND_SOC_DAIFMT_I2S:
109 case SND_SOC_DAIFMT_RIGHT_J:
110 case SND_SOC_DAIFMT_LEFT_J:
111 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
112 case SND_SOC_DAIFMT_NB_NF:
113 break;
114 case SND_SOC_DAIFMT_IB_IF:
115 format |= SI476X_DAUDIO_MODE_IB |
116 SI476X_DAUDIO_MODE_IF;
117 break;
118 case SND_SOC_DAIFMT_IB_NF:
119 format |= SI476X_DAUDIO_MODE_IB;
120 break;
121 case SND_SOC_DAIFMT_NB_IF:
122 format |= SI476X_DAUDIO_MODE_IF;
123 break;
124 default:
125 return -EINVAL;
126 }
127 break;
128 default:
129 return -EINVAL;
130 }
131
132 si476x_core_lock(core);
133
134 err = snd_soc_component_update_bits(codec_dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
135 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
136 format);
137
138 si476x_core_unlock(core);
139
140 if (err < 0) {
141 dev_err(codec_dai->component->dev, "Failed to set output format\n");
142 return err;
143 }
144
145 return 0;
146 }
147
148 static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
149 struct snd_pcm_hw_params *params,
150 struct snd_soc_dai *dai)
151 {
152 struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
153 int rate, width, err;
154
155 rate = params_rate(params);
156 if (rate < 32000 || rate > 48000) {
157 dev_err(dai->component->dev, "Rate: %d is not supported\n", rate);
158 return -EINVAL;
159 }
160
161 switch (params_width(params)) {
162 case 8:
163 width = SI476X_PCM_FORMAT_S8;
164 break;
165 case 16:
166 width = SI476X_PCM_FORMAT_S16_LE;
167 break;
168 case 20:
169 width = SI476X_PCM_FORMAT_S20_3LE;
170 break;
171 case 24:
172 width = SI476X_PCM_FORMAT_S24_LE;
173 break;
174 default:
175 return -EINVAL;
176 }
177
178 si476x_core_lock(core);
179
180 err = snd_soc_component_write(dai->component, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
181 rate);
182 if (err < 0) {
183 dev_err(dai->component->dev, "Failed to set sample rate\n");
184 goto out;
185 }
186
187 err = snd_soc_component_update_bits(dai->component, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
188 SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
189 (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
190 (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
191 if (err < 0) {
192 dev_err(dai->component->dev, "Failed to set output width\n");
193 goto out;
194 }
195
196 out:
197 si476x_core_unlock(core);
198
199 return err;
200 }
201
202 static const struct snd_soc_dai_ops si476x_dai_ops = {
203 .hw_params = si476x_codec_hw_params,
204 .set_fmt = si476x_codec_set_dai_fmt,
205 };
206
207 static struct snd_soc_dai_driver si476x_dai = {
208 .name = "si476x-codec",
209 .capture = {
210 .stream_name = "Capture",
211 .channels_min = 2,
212 .channels_max = 2,
213
214 .rates = SNDRV_PCM_RATE_32000 |
215 SNDRV_PCM_RATE_44100 |
216 SNDRV_PCM_RATE_48000,
217 .formats = SNDRV_PCM_FMTBIT_S8 |
218 SNDRV_PCM_FMTBIT_S16_LE |
219 SNDRV_PCM_FMTBIT_S20_3LE |
220 SNDRV_PCM_FMTBIT_S24_LE
221 },
222 .ops = &si476x_dai_ops,
223 };
224
225 static int si476x_probe(struct snd_soc_component *component)
226 {
227 snd_soc_component_init_regmap(component,
228 dev_get_regmap(component->dev->parent, NULL));
229
230 return 0;
231 }
232
233 static const struct snd_soc_component_driver soc_component_dev_si476x = {
234 .probe = si476x_probe,
235 .dapm_widgets = si476x_dapm_widgets,
236 .num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets),
237 .dapm_routes = si476x_dapm_routes,
238 .num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes),
239 .idle_bias_on = 1,
240 .use_pmdown_time = 1,
241 .endianness = 1,
242 };
243
244 static int si476x_platform_probe(struct platform_device *pdev)
245 {
246 return devm_snd_soc_register_component(&pdev->dev,
247 &soc_component_dev_si476x,
248 &si476x_dai, 1);
249 }
250
251 MODULE_ALIAS("platform:si476x-codec");
252
253 static struct platform_driver si476x_platform_driver = {
254 .driver = {
255 .name = "si476x-codec",
256 },
257 .probe = si476x_platform_probe,
258 };
259 module_platform_driver(si476x_platform_driver);
260
261 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
262 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
263 MODULE_LICENSE("GPL");
264
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