2 * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
4 * Copyright (C) 2012 Innovative Converged Devices(ICD)
5 * Copyright (C) 2013 Andrey Smirnov
7 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
20 #include <linux/module.h>
21 #include <linux/slab.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/initval.h>
27 #include <linux/i2c.h>
29 #include <linux/mfd/si476x-core.h>
31 enum si476x_audio_registers {
32 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
33 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
36 enum si476x_digital_io_output_format {
37 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
38 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
41 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
42 (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
43 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e)
45 enum si476x_daudio_formats {
46 SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
47 SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
48 SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
49 SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
50 SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
52 SI476X_DAUDIO_MODE_IB = (1 << 5),
53 SI476X_DAUDIO_MODE_IF = (1 << 6),
56 enum si476x_pcm_format {
57 SI476X_PCM_FORMAT_S8 = 2,
58 SI476X_PCM_FORMAT_S16_LE = 4,
59 SI476X_PCM_FORMAT_S20_3LE = 5,
60 SI476X_PCM_FORMAT_S24_LE = 6,
63 static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = {
64 SND_SOC_DAPM_OUTPUT("LOUT"),
65 SND_SOC_DAPM_OUTPUT("ROUT"),
68 static const struct snd_soc_dapm_route si476x_dapm_routes[] = {
69 { "Capture", NULL, "LOUT" },
70 { "Capture", NULL, "ROUT" },
73 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
76 struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev);
80 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
83 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
84 case SND_SOC_DAIFMT_DSP_A:
85 format |= SI476X_DAUDIO_MODE_DSP_A;
87 case SND_SOC_DAIFMT_DSP_B:
88 format |= SI476X_DAUDIO_MODE_DSP_B;
90 case SND_SOC_DAIFMT_I2S:
91 format |= SI476X_DAUDIO_MODE_I2S;
93 case SND_SOC_DAIFMT_RIGHT_J:
94 format |= SI476X_DAUDIO_MODE_RIGHT_J;
96 case SND_SOC_DAIFMT_LEFT_J:
97 format |= SI476X_DAUDIO_MODE_LEFT_J;
103 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
104 case SND_SOC_DAIFMT_DSP_A:
105 case SND_SOC_DAIFMT_DSP_B:
106 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
107 case SND_SOC_DAIFMT_NB_NF:
109 case SND_SOC_DAIFMT_IB_NF:
110 format |= SI476X_DAUDIO_MODE_IB;
116 case SND_SOC_DAIFMT_I2S:
117 case SND_SOC_DAIFMT_RIGHT_J:
118 case SND_SOC_DAIFMT_LEFT_J:
119 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
120 case SND_SOC_DAIFMT_NB_NF:
122 case SND_SOC_DAIFMT_IB_IF:
123 format |= SI476X_DAUDIO_MODE_IB |
124 SI476X_DAUDIO_MODE_IF;
126 case SND_SOC_DAIFMT_IB_NF:
127 format |= SI476X_DAUDIO_MODE_IB;
129 case SND_SOC_DAIFMT_NB_IF:
130 format |= SI476X_DAUDIO_MODE_IF;
140 si476x_core_lock(core);
142 err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
143 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
146 si476x_core_unlock(core);
149 dev_err(codec_dai->codec->dev, "Failed to set output format\n");
156 static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
157 struct snd_pcm_hw_params *params,
158 struct snd_soc_dai *dai)
160 struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev);
161 int rate, width, err;
163 rate = params_rate(params);
164 if (rate < 32000 || rate > 48000) {
165 dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
169 switch (params_format(params)) {
170 case SNDRV_PCM_FORMAT_S8:
171 width = SI476X_PCM_FORMAT_S8;
173 case SNDRV_PCM_FORMAT_S16_LE:
174 width = SI476X_PCM_FORMAT_S16_LE;
176 case SNDRV_PCM_FORMAT_S20_3LE:
177 width = SI476X_PCM_FORMAT_S20_3LE;
179 case SNDRV_PCM_FORMAT_S24_LE:
180 width = SI476X_PCM_FORMAT_S24_LE;
186 si476x_core_lock(core);
188 err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
191 dev_err(dai->codec->dev, "Failed to set sample rate\n");
195 err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
196 SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
197 (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
198 (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
200 dev_err(dai->codec->dev, "Failed to set output width\n");
205 si476x_core_unlock(core);
210 static int si476x_codec_probe(struct snd_soc_codec *codec)
212 codec->control_data = dev_get_regmap(codec->dev->parent, NULL);
213 return snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);
216 static struct snd_soc_dai_ops si476x_dai_ops = {
217 .hw_params = si476x_codec_hw_params,
218 .set_fmt = si476x_codec_set_dai_fmt,
221 static struct snd_soc_dai_driver si476x_dai = {
222 .name = "si476x-codec",
224 .stream_name = "Capture",
228 .rates = SNDRV_PCM_RATE_32000 |
229 SNDRV_PCM_RATE_44100 |
230 SNDRV_PCM_RATE_48000,
231 .formats = SNDRV_PCM_FMTBIT_S8 |
232 SNDRV_PCM_FMTBIT_S16_LE |
233 SNDRV_PCM_FMTBIT_S20_3LE |
234 SNDRV_PCM_FMTBIT_S24_LE
236 .ops = &si476x_dai_ops,
239 static struct snd_soc_codec_driver soc_codec_dev_si476x = {
240 .probe = si476x_codec_probe,
241 .dapm_widgets = si476x_dapm_widgets,
242 .num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets),
243 .dapm_routes = si476x_dapm_routes,
244 .num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes),
247 static int si476x_platform_probe(struct platform_device *pdev)
249 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
253 static int si476x_platform_remove(struct platform_device *pdev)
255 snd_soc_unregister_codec(&pdev->dev);
259 MODULE_ALIAS("platform:si476x-codec");
261 static struct platform_driver si476x_platform_driver = {
263 .name = "si476x-codec",
264 .owner = THIS_MODULE,
266 .probe = si476x_platform_probe,
267 .remove = si476x_platform_remove,
269 module_platform_driver(si476x_platform_driver);
271 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
272 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
273 MODULE_LICENSE("GPL");