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Linux/sound/soc/codecs/si476x.c

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  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_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
 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         .non_legacy_dai_naming  = 1,
243 };
244 
245 static int si476x_platform_probe(struct platform_device *pdev)
246 {
247         return devm_snd_soc_register_component(&pdev->dev,
248                                       &soc_component_dev_si476x,
249                                       &si476x_dai, 1);
250 }
251 
252 MODULE_ALIAS("platform:si476x-codec");
253 
254 static struct platform_driver si476x_platform_driver = {
255         .driver         = {
256                 .name   = "si476x-codec",
257         },
258         .probe          = si476x_platform_probe,
259 };
260 module_platform_driver(si476x_platform_driver);
261 
262 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
263 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
264 MODULE_LICENSE("GPL");
265 

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