1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Cirrus Logic CS4341A ALSA SoC Codec Driver 4 * Author: Alexander Shiyan <shc_work@mail.ru> 5 */ 6 7 #include <linux/i2c.h> 8 #include <linux/module.h> 9 #include <linux/of.h> 10 #include <linux/regmap.h> 11 #include <linux/spi/spi.h> 12 13 #include <sound/pcm.h> 14 #include <sound/pcm_params.h> 15 #include <sound/soc.h> 16 #include <sound/tlv.h> 17 18 #define CS4341_REG_MODE1 0x00 19 #define CS4341_REG_MODE2 0x01 20 #define CS4341_REG_MIX 0x02 21 #define CS4341_REG_VOLA 0x03 22 #define CS4341_REG_VOLB 0x04 23 24 #define CS4341_MODE2_DIF (7 << 4) 25 #define CS4341_MODE2_DIF_I2S_24 (0 << 4) 26 #define CS4341_MODE2_DIF_I2S_16 (1 << 4) 27 #define CS4341_MODE2_DIF_LJ_24 (2 << 4) 28 #define CS4341_MODE2_DIF_RJ_24 (3 << 4) 29 #define CS4341_MODE2_DIF_RJ_16 (5 << 4) 30 #define CS4341_VOLX_MUTE (1 << 7) 31 32 struct cs4341_priv { 33 unsigned int fmt; 34 struct regmap *regmap; 35 struct regmap_config regcfg; 36 }; 37 38 static const struct reg_default cs4341_reg_defaults[] = { 39 { CS4341_REG_MODE1, 0x00 }, 40 { CS4341_REG_MODE2, 0x82 }, 41 { CS4341_REG_MIX, 0x49 }, 42 { CS4341_REG_VOLA, 0x80 }, 43 { CS4341_REG_VOLB, 0x80 }, 44 }; 45 46 static int cs4341_set_fmt(struct snd_soc_dai *dai, unsigned int format) 47 { 48 struct snd_soc_component *component = dai->component; 49 struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component); 50 51 switch (format & SND_SOC_DAIFMT_MASTER_MASK) { 52 case SND_SOC_DAIFMT_CBS_CFS: 53 break; 54 default: 55 return -EINVAL; 56 } 57 58 switch (format & SND_SOC_DAIFMT_INV_MASK) { 59 case SND_SOC_DAIFMT_NB_NF: 60 break; 61 default: 62 return -EINVAL; 63 } 64 65 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { 66 case SND_SOC_DAIFMT_I2S: 67 case SND_SOC_DAIFMT_LEFT_J: 68 case SND_SOC_DAIFMT_RIGHT_J: 69 cs4341->fmt = format & SND_SOC_DAIFMT_FORMAT_MASK; 70 break; 71 default: 72 return -EINVAL; 73 } 74 75 return 0; 76 } 77 78 static int cs4341_hw_params(struct snd_pcm_substream *substream, 79 struct snd_pcm_hw_params *params, 80 struct snd_soc_dai *dai) 81 { 82 struct snd_soc_component *component = dai->component; 83 struct cs4341_priv *cs4341 = snd_soc_component_get_drvdata(component); 84 unsigned int mode = 0; 85 int b24 = 0; 86 87 switch (params_format(params)) { 88 case SNDRV_PCM_FORMAT_S24_LE: 89 b24 = 1; 90 break; 91 case SNDRV_PCM_FORMAT_S16_LE: 92 break; 93 default: 94 dev_err(component->dev, "Unsupported PCM format 0x%08x.\n", 95 params_format(params)); 96 return -EINVAL; 97 } 98 99 switch (cs4341->fmt) { 100 case SND_SOC_DAIFMT_I2S: 101 mode = b24 ? CS4341_MODE2_DIF_I2S_24 : CS4341_MODE2_DIF_I2S_16; 102 break; 103 case SND_SOC_DAIFMT_LEFT_J: 104 mode = CS4341_MODE2_DIF_LJ_24; 105 break; 106 case SND_SOC_DAIFMT_RIGHT_J: 107 mode = b24 ? CS4341_MODE2_DIF_RJ_24 : CS4341_MODE2_DIF_RJ_16; 108 break; 109 default: 110 dev_err(component->dev, "Unsupported DAI format 0x%08x.\n", 111 cs4341->fmt); 112 return -EINVAL; 113 } 114 115 return snd_soc_component_update_bits(component, CS4341_REG_MODE2, 116 CS4341_MODE2_DIF, mode); 117 } 118 119 static int cs4341_mute(struct snd_soc_dai *dai, int mute, int direction) 120 { 121 struct snd_soc_component *component = dai->component; 122 int ret; 123 124 ret = snd_soc_component_update_bits(component, CS4341_REG_VOLA, 125 CS4341_VOLX_MUTE, 126 mute ? CS4341_VOLX_MUTE : 0); 127 if (ret < 0) 128 return ret; 129 130 return snd_soc_component_update_bits(component, CS4341_REG_VOLB, 131 CS4341_VOLX_MUTE, 132 mute ? CS4341_VOLX_MUTE : 0); 133 } 134 135 static DECLARE_TLV_DB_SCALE(out_tlv, -9000, 100, 0); 136 137 static const char * const deemph[] = { 138 "None", "44.1k", "48k", "32k", 139 }; 140 141 static const struct soc_enum deemph_enum = 142 SOC_ENUM_SINGLE(CS4341_REG_MODE2, 2, 4, deemph); 143 144 static const char * const srzc[] = { 145 "Immediate", "Zero Cross", "Soft Ramp", "SR on ZC", 146 }; 147 148 static const struct soc_enum srzc_enum = 149 SOC_ENUM_SINGLE(CS4341_REG_MIX, 5, 4, srzc); 150 151 152 static const struct snd_soc_dapm_widget cs4341_dapm_widgets[] = { 153 SND_SOC_DAPM_DAC("HiFi DAC", NULL, SND_SOC_NOPM, 0, 0), 154 SND_SOC_DAPM_OUTPUT("OutA"), 155 SND_SOC_DAPM_OUTPUT("OutB"), 156 }; 157 158 static const struct snd_soc_dapm_route cs4341_routes[] = { 159 { "OutA", NULL, "HiFi DAC" }, 160 { "OutB", NULL, "HiFi DAC" }, 161 { "DAC Playback", NULL, "OutA" }, 162 { "DAC Playback", NULL, "OutB" }, 163 }; 164 165 static const struct snd_kcontrol_new cs4341_controls[] = { 166 SOC_DOUBLE_R_TLV("Master Playback Volume", 167 CS4341_REG_VOLA, CS4341_REG_VOLB, 0, 90, 1, out_tlv), 168 SOC_ENUM("De-Emphasis Control", deemph_enum), 169 SOC_ENUM("Soft Ramp Zero Cross Control", srzc_enum), 170 SOC_SINGLE("Auto-Mute Switch", CS4341_REG_MODE2, 7, 1, 0), 171 SOC_SINGLE("Popguard Transient Switch", CS4341_REG_MODE2, 1, 1, 0), 172 }; 173 174 static const struct snd_soc_dai_ops cs4341_dai_ops = { 175 .set_fmt = cs4341_set_fmt, 176 .hw_params = cs4341_hw_params, 177 .mute_stream = cs4341_mute, 178 .no_capture_mute = 1, 179 }; 180 181 static struct snd_soc_dai_driver cs4341_dai = { 182 .name = "cs4341a-hifi", 183 .playback = { 184 .stream_name = "DAC Playback", 185 .channels_min = 1, 186 .channels_max = 2, 187 .rates = SNDRV_PCM_RATE_8000_96000, 188 .formats = SNDRV_PCM_FMTBIT_S16_LE | 189 SNDRV_PCM_FMTBIT_S24_LE, 190 }, 191 .ops = &cs4341_dai_ops, 192 .symmetric_rate = 1, 193 }; 194 195 static const struct snd_soc_component_driver soc_component_cs4341 = { 196 .controls = cs4341_controls, 197 .num_controls = ARRAY_SIZE(cs4341_controls), 198 .dapm_widgets = cs4341_dapm_widgets, 199 .num_dapm_widgets = ARRAY_SIZE(cs4341_dapm_widgets), 200 .dapm_routes = cs4341_routes, 201 .num_dapm_routes = ARRAY_SIZE(cs4341_routes), 202 .idle_bias_on = 1, 203 .use_pmdown_time = 1, 204 .endianness = 1, 205 }; 206 207 static const struct of_device_id __maybe_unused cs4341_dt_ids[] = { 208 { .compatible = "cirrus,cs4341a", }, 209 { } 210 }; 211 MODULE_DEVICE_TABLE(of, cs4341_dt_ids); 212 213 static int cs4341_probe(struct device *dev) 214 { 215 struct cs4341_priv *cs4341 = dev_get_drvdata(dev); 216 int i; 217 218 for (i = 0; i < ARRAY_SIZE(cs4341_reg_defaults); i++) 219 regmap_write(cs4341->regmap, cs4341_reg_defaults[i].reg, 220 cs4341_reg_defaults[i].def); 221 222 return devm_snd_soc_register_component(dev, &soc_component_cs4341, 223 &cs4341_dai, 1); 224 } 225 226 #if IS_ENABLED(CONFIG_I2C) 227 static int cs4341_i2c_probe(struct i2c_client *i2c) 228 { 229 struct cs4341_priv *cs4341; 230 231 cs4341 = devm_kzalloc(&i2c->dev, sizeof(*cs4341), GFP_KERNEL); 232 if (!cs4341) 233 return -ENOMEM; 234 235 i2c_set_clientdata(i2c, cs4341); 236 237 cs4341->regcfg.reg_bits = 8; 238 cs4341->regcfg.val_bits = 8; 239 cs4341->regcfg.max_register = CS4341_REG_VOLB; 240 cs4341->regcfg.cache_type = REGCACHE_FLAT; 241 cs4341->regcfg.reg_defaults = cs4341_reg_defaults; 242 cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults); 243 cs4341->regmap = devm_regmap_init_i2c(i2c, &cs4341->regcfg); 244 if (IS_ERR(cs4341->regmap)) 245 return PTR_ERR(cs4341->regmap); 246 247 return cs4341_probe(&i2c->dev); 248 } 249 250 static const struct i2c_device_id cs4341_i2c_id[] = { 251 { "cs4341" }, 252 { } 253 }; 254 MODULE_DEVICE_TABLE(i2c, cs4341_i2c_id); 255 256 static struct i2c_driver cs4341_i2c_driver = { 257 .driver = { 258 .name = "cs4341-i2c", 259 .of_match_table = of_match_ptr(cs4341_dt_ids), 260 }, 261 .probe = cs4341_i2c_probe, 262 .id_table = cs4341_i2c_id, 263 }; 264 #endif 265 266 #if defined(CONFIG_SPI_MASTER) 267 static bool cs4341_reg_readable(struct device *dev, unsigned int reg) 268 { 269 return false; 270 } 271 272 static int cs4341_spi_probe(struct spi_device *spi) 273 { 274 struct cs4341_priv *cs4341; 275 int ret; 276 277 cs4341 = devm_kzalloc(&spi->dev, sizeof(*cs4341), GFP_KERNEL); 278 if (!cs4341) 279 return -ENOMEM; 280 281 if (!spi->bits_per_word) 282 spi->bits_per_word = 8; 283 if (!spi->max_speed_hz) 284 spi->max_speed_hz = 6000000; 285 ret = spi_setup(spi); 286 if (ret) 287 return ret; 288 289 spi_set_drvdata(spi, cs4341); 290 291 cs4341->regcfg.reg_bits = 16; 292 cs4341->regcfg.val_bits = 8; 293 cs4341->regcfg.write_flag_mask = 0x20; 294 cs4341->regcfg.max_register = CS4341_REG_VOLB; 295 cs4341->regcfg.cache_type = REGCACHE_FLAT; 296 cs4341->regcfg.readable_reg = cs4341_reg_readable; 297 cs4341->regcfg.reg_defaults = cs4341_reg_defaults; 298 cs4341->regcfg.num_reg_defaults = ARRAY_SIZE(cs4341_reg_defaults); 299 cs4341->regmap = devm_regmap_init_spi(spi, &cs4341->regcfg); 300 if (IS_ERR(cs4341->regmap)) 301 return PTR_ERR(cs4341->regmap); 302 303 return cs4341_probe(&spi->dev); 304 } 305 306 static const struct spi_device_id cs4341_spi_ids[] = { 307 { "cs4341a" }, 308 { } 309 }; 310 MODULE_DEVICE_TABLE(spi, cs4341_spi_ids); 311 312 static struct spi_driver cs4341_spi_driver = { 313 .driver = { 314 .name = "cs4341-spi", 315 .of_match_table = of_match_ptr(cs4341_dt_ids), 316 }, 317 .probe = cs4341_spi_probe, 318 .id_table = cs4341_spi_ids, 319 }; 320 #endif 321 322 static int __init cs4341_init(void) 323 { 324 int ret = 0; 325 326 #if IS_ENABLED(CONFIG_I2C) 327 ret = i2c_add_driver(&cs4341_i2c_driver); 328 if (ret) 329 return ret; 330 #endif 331 #if defined(CONFIG_SPI_MASTER) 332 ret = spi_register_driver(&cs4341_spi_driver); 333 #endif 334 335 return ret; 336 } 337 module_init(cs4341_init); 338 339 static void __exit cs4341_exit(void) 340 { 341 #if IS_ENABLED(CONFIG_I2C) 342 i2c_del_driver(&cs4341_i2c_driver); 343 #endif 344 #if defined(CONFIG_SPI_MASTER) 345 spi_unregister_driver(&cs4341_spi_driver); 346 #endif 347 } 348 module_exit(cs4341_exit); 349 350 MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>"); 351 MODULE_DESCRIPTION("Cirrus Logic CS4341 ALSA SoC Codec Driver"); 352 MODULE_LICENSE("GPL"); 353