1 /* 2 * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips 3 * 4 * Copyright (C) 2012 Innovative Converged Devices(ICD) 5 * Copyright (C) 2013 Andrey Smirnov 6 * 7 * Author: Andrey Smirnov <andrew.smirnov@gmail.com> 8 * 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. 12 * 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. 17 * 18 */ 19 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> 26 27 #include <linux/i2c.h> 28 29 #include <linux/mfd/si476x-core.h> 30 31 enum si476x_audio_registers { 32 SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203, 33 SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202, 34 }; 35 36 enum si476x_digital_io_output_format { 37 SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11, 38 SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8, 39 }; 40 41 #define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0b111 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \ 42 (0b111 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)) 43 #define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0b1111110) 44 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), 51 52 SI476X_DAUDIO_MODE_IB = (1 << 5), 53 SI476X_DAUDIO_MODE_IF = (1 << 6), 54 }; 55 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, 61 }; 62 63 static unsigned int si476x_codec_read(struct snd_soc_codec *codec, 64 unsigned int reg) 65 { 66 int err; 67 unsigned int val; 68 struct si476x_core *core = codec->control_data; 69 70 si476x_core_lock(core); 71 if (!si476x_core_is_powered_up(core)) 72 regcache_cache_only(core->regmap, true); 73 74 err = regmap_read(core->regmap, reg, &val); 75 76 if (!si476x_core_is_powered_up(core)) 77 regcache_cache_only(core->regmap, false); 78 si476x_core_unlock(core); 79 80 if (err < 0) 81 return err; 82 83 return val; 84 } 85 86 static int si476x_codec_write(struct snd_soc_codec *codec, 87 unsigned int reg, unsigned int val) 88 { 89 int err; 90 struct si476x_core *core = codec->control_data; 91 92 si476x_core_lock(core); 93 if (!si476x_core_is_powered_up(core)) 94 regcache_cache_only(core->regmap, true); 95 96 err = regmap_write(core->regmap, reg, val); 97 98 if (!si476x_core_is_powered_up(core)) 99 regcache_cache_only(core->regmap, false); 100 si476x_core_unlock(core); 101 102 return err; 103 } 104 105 static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai, 106 unsigned int fmt) 107 { 108 int err; 109 u16 format = 0; 110 111 if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) 112 return -EINVAL; 113 114 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 115 case SND_SOC_DAIFMT_DSP_A: 116 format |= SI476X_DAUDIO_MODE_DSP_A; 117 break; 118 case SND_SOC_DAIFMT_DSP_B: 119 format |= SI476X_DAUDIO_MODE_DSP_B; 120 break; 121 case SND_SOC_DAIFMT_I2S: 122 format |= SI476X_DAUDIO_MODE_I2S; 123 break; 124 case SND_SOC_DAIFMT_RIGHT_J: 125 format |= SI476X_DAUDIO_MODE_RIGHT_J; 126 break; 127 case SND_SOC_DAIFMT_LEFT_J: 128 format |= SI476X_DAUDIO_MODE_LEFT_J; 129 break; 130 default: 131 return -EINVAL; 132 } 133 134 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 135 case SND_SOC_DAIFMT_DSP_A: 136 case SND_SOC_DAIFMT_DSP_B: 137 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 138 case SND_SOC_DAIFMT_NB_NF: 139 break; 140 case SND_SOC_DAIFMT_IB_NF: 141 format |= SI476X_DAUDIO_MODE_IB; 142 break; 143 default: 144 return -EINVAL; 145 } 146 break; 147 case SND_SOC_DAIFMT_I2S: 148 case SND_SOC_DAIFMT_RIGHT_J: 149 case SND_SOC_DAIFMT_LEFT_J: 150 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 151 case SND_SOC_DAIFMT_NB_NF: 152 break; 153 case SND_SOC_DAIFMT_IB_IF: 154 format |= SI476X_DAUDIO_MODE_IB | 155 SI476X_DAUDIO_MODE_IF; 156 break; 157 case SND_SOC_DAIFMT_IB_NF: 158 format |= SI476X_DAUDIO_MODE_IB; 159 break; 160 case SND_SOC_DAIFMT_NB_IF: 161 format |= SI476X_DAUDIO_MODE_IF; 162 break; 163 default: 164 return -EINVAL; 165 } 166 break; 167 default: 168 return -EINVAL; 169 } 170 171 err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, 172 SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK, 173 format); 174 if (err < 0) { 175 dev_err(codec_dai->codec->dev, "Failed to set output format\n"); 176 return err; 177 } 178 179 return 0; 180 } 181 182 static int si476x_codec_hw_params(struct snd_pcm_substream *substream, 183 struct snd_pcm_hw_params *params, 184 struct snd_soc_dai *dai) 185 { 186 int rate, width, err; 187 188 rate = params_rate(params); 189 if (rate < 32000 || rate > 48000) { 190 dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate); 191 return -EINVAL; 192 } 193 194 switch (params_format(params)) { 195 case SNDRV_PCM_FORMAT_S8: 196 width = SI476X_PCM_FORMAT_S8; 197 break; 198 case SNDRV_PCM_FORMAT_S16_LE: 199 width = SI476X_PCM_FORMAT_S16_LE; 200 break; 201 case SNDRV_PCM_FORMAT_S20_3LE: 202 width = SI476X_PCM_FORMAT_S20_3LE; 203 break; 204 case SNDRV_PCM_FORMAT_S24_LE: 205 width = SI476X_PCM_FORMAT_S24_LE; 206 break; 207 default: 208 return -EINVAL; 209 } 210 211 err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE, 212 rate); 213 if (err < 0) { 214 dev_err(dai->codec->dev, "Failed to set sample rate\n"); 215 return err; 216 } 217 218 err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, 219 SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK, 220 (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | 221 (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)); 222 if (err < 0) { 223 dev_err(dai->codec->dev, "Failed to set output width\n"); 224 return err; 225 } 226 227 return 0; 228 } 229 230 static int si476x_codec_probe(struct snd_soc_codec *codec) 231 { 232 codec->control_data = i2c_mfd_cell_to_core(codec->dev); 233 return 0; 234 } 235 236 static struct snd_soc_dai_ops si476x_dai_ops = { 237 .hw_params = si476x_codec_hw_params, 238 .set_fmt = si476x_codec_set_dai_fmt, 239 }; 240 241 static struct snd_soc_dai_driver si476x_dai = { 242 .name = "si476x-codec", 243 .capture = { 244 .stream_name = "Capture", 245 .channels_min = 2, 246 .channels_max = 2, 247 248 .rates = SNDRV_PCM_RATE_32000 | 249 SNDRV_PCM_RATE_44100 | 250 SNDRV_PCM_RATE_48000, 251 .formats = SNDRV_PCM_FMTBIT_S8 | 252 SNDRV_PCM_FMTBIT_S16_LE | 253 SNDRV_PCM_FMTBIT_S20_3LE | 254 SNDRV_PCM_FMTBIT_S24_LE 255 }, 256 .ops = &si476x_dai_ops, 257 }; 258 259 static struct snd_soc_codec_driver soc_codec_dev_si476x = { 260 .probe = si476x_codec_probe, 261 .read = si476x_codec_read, 262 .write = si476x_codec_write, 263 }; 264 265 static int si476x_platform_probe(struct platform_device *pdev) 266 { 267 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x, 268 &si476x_dai, 1); 269 } 270 271 static int si476x_platform_remove(struct platform_device *pdev) 272 { 273 snd_soc_unregister_codec(&pdev->dev); 274 return 0; 275 } 276 277 MODULE_ALIAS("platform:si476x-codec"); 278 279 static struct platform_driver si476x_platform_driver = { 280 .driver = { 281 .name = "si476x-codec", 282 .owner = THIS_MODULE, 283 }, 284 .probe = si476x_platform_probe, 285 .remove = si476x_platform_remove, 286 }; 287 module_platform_driver(si476x_platform_driver); 288 289 MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); 290 MODULE_DESCRIPTION("ASoC Si4761/64 codec driver"); 291 MODULE_LICENSE("GPL"); 292