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