1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * max98371.c -- ALSA SoC Stereo MAX98371 driver 4 * 5 * Copyright 2015-16 Maxim Integrated Products 6 */ 7 8 #include <linux/i2c.h> 9 #include <linux/module.h> 10 #include <linux/regmap.h> 11 #include <linux/slab.h> 12 #include <sound/pcm.h> 13 #include <sound/pcm_params.h> 14 #include <sound/soc.h> 15 #include <sound/tlv.h> 16 #include "max98371.h" 17 18 static const char *const monomix_text[] = { 19 "Left", "Right", "LeftRightDiv2", 20 }; 21 22 static const char *const hpf_cutoff_txt[] = { 23 "Disable", "DC Block", "50Hz", 24 "100Hz", "200Hz", "400Hz", "800Hz", 25 }; 26 27 static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0, 28 monomix_text); 29 30 static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0, 31 hpf_cutoff_txt); 32 33 static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain, 34 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), 35 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), 36 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), 37 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), 38 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), 39 10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0), 40 ); 41 42 static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain, 43 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), 44 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), 45 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), 46 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), 47 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), 48 10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0), 49 ); 50 51 static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain, 52 0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0), 53 2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0), 54 7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0), 55 9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0), 56 12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0), 57 14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0), 58 ); 59 60 static const struct reg_default max98371_reg[] = { 61 { 0x01, 0x00 }, 62 { 0x02, 0x00 }, 63 { 0x03, 0x00 }, 64 { 0x04, 0x00 }, 65 { 0x05, 0x00 }, 66 { 0x06, 0x00 }, 67 { 0x07, 0x00 }, 68 { 0x08, 0x00 }, 69 { 0x09, 0x00 }, 70 { 0x0A, 0x00 }, 71 { 0x10, 0x06 }, 72 { 0x11, 0x08 }, 73 { 0x14, 0x80 }, 74 { 0x15, 0x00 }, 75 { 0x16, 0x00 }, 76 { 0x18, 0x00 }, 77 { 0x19, 0x00 }, 78 { 0x1C, 0x00 }, 79 { 0x1D, 0x00 }, 80 { 0x1E, 0x00 }, 81 { 0x1F, 0x00 }, 82 { 0x20, 0x00 }, 83 { 0x21, 0x00 }, 84 { 0x22, 0x00 }, 85 { 0x23, 0x00 }, 86 { 0x24, 0x00 }, 87 { 0x25, 0x00 }, 88 { 0x26, 0x00 }, 89 { 0x27, 0x00 }, 90 { 0x28, 0x00 }, 91 { 0x29, 0x00 }, 92 { 0x2A, 0x00 }, 93 { 0x2B, 0x00 }, 94 { 0x2C, 0x00 }, 95 { 0x2D, 0x00 }, 96 { 0x2E, 0x0B }, 97 { 0x31, 0x00 }, 98 { 0x32, 0x18 }, 99 { 0x33, 0x00 }, 100 { 0x34, 0x00 }, 101 { 0x36, 0x00 }, 102 { 0x37, 0x00 }, 103 { 0x38, 0x00 }, 104 { 0x39, 0x00 }, 105 { 0x3A, 0x00 }, 106 { 0x3B, 0x00 }, 107 { 0x3C, 0x00 }, 108 { 0x3D, 0x00 }, 109 { 0x3E, 0x00 }, 110 { 0x3F, 0x00 }, 111 { 0x40, 0x00 }, 112 { 0x41, 0x00 }, 113 { 0x42, 0x00 }, 114 { 0x43, 0x00 }, 115 { 0x4A, 0x00 }, 116 { 0x4B, 0x00 }, 117 { 0x4C, 0x00 }, 118 { 0x4D, 0x00 }, 119 { 0x4E, 0x00 }, 120 { 0x50, 0x00 }, 121 { 0x51, 0x00 }, 122 { 0x55, 0x00 }, 123 { 0x58, 0x00 }, 124 { 0x59, 0x00 }, 125 { 0x5C, 0x00 }, 126 { 0xFF, 0x43 }, 127 }; 128 129 static bool max98371_volatile_register(struct device *dev, unsigned int reg) 130 { 131 switch (reg) { 132 case MAX98371_IRQ_CLEAR1: 133 case MAX98371_IRQ_CLEAR2: 134 case MAX98371_IRQ_CLEAR3: 135 case MAX98371_VERSION: 136 return true; 137 default: 138 return false; 139 } 140 } 141 142 static bool max98371_readable_register(struct device *dev, unsigned int reg) 143 { 144 switch (reg) { 145 case MAX98371_SOFT_RESET: 146 return false; 147 default: 148 return true; 149 } 150 }; 151 152 static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv, 153 0, 7, TLV_DB_SCALE_ITEM(0, 50, 0), 154 8, 10, TLV_DB_SCALE_ITEM(400, 100, 0) 155 ); 156 157 static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1); 158 159 static const struct snd_kcontrol_new max98371_snd_controls[] = { 160 SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN, 161 MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0, 162 max98371_gain_tlv), 163 SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0, 164 (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv), 165 SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN, 166 0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0, 167 max98371_dht_max_gain), 168 SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN, 169 0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0, 170 max98371_dht_min_gain), 171 SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN, 172 0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0, 173 max98371_dht_rot_gain), 174 SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0), 175 SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0), 176 SOC_ENUM("Monomix Select", max98371_monomix), 177 SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff), 178 }; 179 180 static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai, 181 unsigned int fmt) 182 { 183 struct snd_soc_component *component = codec_dai->component; 184 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component); 185 unsigned int val = 0; 186 187 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 188 case SND_SOC_DAIFMT_CBC_CFC: 189 break; 190 default: 191 dev_err(component->dev, "DAI clock mode unsupported"); 192 return -EINVAL; 193 } 194 195 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 196 case SND_SOC_DAIFMT_I2S: 197 val |= 0; 198 break; 199 case SND_SOC_DAIFMT_RIGHT_J: 200 val |= MAX98371_DAI_RIGHT; 201 break; 202 case SND_SOC_DAIFMT_LEFT_J: 203 val |= MAX98371_DAI_LEFT; 204 break; 205 default: 206 dev_err(component->dev, "DAI wrong mode unsupported"); 207 return -EINVAL; 208 } 209 regmap_update_bits(max98371->regmap, MAX98371_FMT, 210 MAX98371_FMT_MODE_MASK, val); 211 return 0; 212 } 213 214 static int max98371_dai_hw_params(struct snd_pcm_substream *substream, 215 struct snd_pcm_hw_params *params, 216 struct snd_soc_dai *dai) 217 { 218 struct snd_soc_component *component = dai->component; 219 struct max98371_priv *max98371 = snd_soc_component_get_drvdata(component); 220 int blr_clk_ratio, ch_size, channels = params_channels(params); 221 int rate = params_rate(params); 222 223 switch (params_format(params)) { 224 case SNDRV_PCM_FORMAT_S8: 225 regmap_update_bits(max98371->regmap, MAX98371_FMT, 226 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); 227 ch_size = 8; 228 break; 229 case SNDRV_PCM_FORMAT_S16_LE: 230 regmap_update_bits(max98371->regmap, MAX98371_FMT, 231 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); 232 ch_size = 16; 233 break; 234 case SNDRV_PCM_FORMAT_S24_LE: 235 regmap_update_bits(max98371->regmap, MAX98371_FMT, 236 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); 237 ch_size = 24; 238 break; 239 case SNDRV_PCM_FORMAT_S32_LE: 240 regmap_update_bits(max98371->regmap, MAX98371_FMT, 241 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); 242 ch_size = 32; 243 break; 244 default: 245 return -EINVAL; 246 } 247 248 /* BCLK/LRCLK ratio calculation */ 249 blr_clk_ratio = channels * ch_size; 250 switch (blr_clk_ratio) { 251 case 32: 252 regmap_update_bits(max98371->regmap, 253 MAX98371_DAI_CLK, 254 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32); 255 break; 256 case 48: 257 regmap_update_bits(max98371->regmap, 258 MAX98371_DAI_CLK, 259 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48); 260 break; 261 case 64: 262 regmap_update_bits(max98371->regmap, 263 MAX98371_DAI_CLK, 264 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64); 265 break; 266 default: 267 return -EINVAL; 268 } 269 270 switch (rate) { 271 case 32000: 272 regmap_update_bits(max98371->regmap, 273 MAX98371_SPK_SR, 274 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32); 275 break; 276 case 44100: 277 regmap_update_bits(max98371->regmap, 278 MAX98371_SPK_SR, 279 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44); 280 break; 281 case 48000: 282 regmap_update_bits(max98371->regmap, 283 MAX98371_SPK_SR, 284 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48); 285 break; 286 case 88200: 287 regmap_update_bits(max98371->regmap, 288 MAX98371_SPK_SR, 289 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88); 290 break; 291 case 96000: 292 regmap_update_bits(max98371->regmap, 293 MAX98371_SPK_SR, 294 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96); 295 break; 296 default: 297 return -EINVAL; 298 } 299 300 /* enabling both the RX channels*/ 301 regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC, 302 MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1); 303 regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL, 304 MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK); 305 return 0; 306 } 307 308 static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = { 309 SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0), 310 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE, 311 0, 0, NULL, 0), 312 SND_SOC_DAPM_OUTPUT("SPK_OUT"), 313 }; 314 315 static const struct snd_soc_dapm_route max98371_audio_map[] = { 316 {"DAC", NULL, "HiFi Playback"}, 317 {"SPK_OUT", NULL, "DAC"}, 318 {"SPK_OUT", NULL, "Global Enable"}, 319 }; 320 321 #define MAX98371_RATES SNDRV_PCM_RATE_8000_48000 322 #define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ 323 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) 324 325 static const struct snd_soc_dai_ops max98371_dai_ops = { 326 .set_fmt = max98371_dai_set_fmt, 327 .hw_params = max98371_dai_hw_params, 328 }; 329 330 static struct snd_soc_dai_driver max98371_dai[] = { 331 { 332 .name = "max98371-aif1", 333 .playback = { 334 .stream_name = "HiFi Playback", 335 .channels_min = 1, 336 .channels_max = 2, 337 .rates = SNDRV_PCM_RATE_8000_48000, 338 .formats = MAX98371_FORMATS, 339 }, 340 .ops = &max98371_dai_ops, 341 } 342 }; 343 344 static const struct snd_soc_component_driver max98371_component = { 345 .controls = max98371_snd_controls, 346 .num_controls = ARRAY_SIZE(max98371_snd_controls), 347 .dapm_routes = max98371_audio_map, 348 .num_dapm_routes = ARRAY_SIZE(max98371_audio_map), 349 .dapm_widgets = max98371_dapm_widgets, 350 .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets), 351 .idle_bias_on = 1, 352 .use_pmdown_time = 1, 353 .endianness = 1, 354 .non_legacy_dai_naming = 1, 355 }; 356 357 static const struct regmap_config max98371_regmap = { 358 .reg_bits = 8, 359 .val_bits = 8, 360 .max_register = MAX98371_VERSION, 361 .reg_defaults = max98371_reg, 362 .num_reg_defaults = ARRAY_SIZE(max98371_reg), 363 .volatile_reg = max98371_volatile_register, 364 .readable_reg = max98371_readable_register, 365 .cache_type = REGCACHE_RBTREE, 366 }; 367 368 static int max98371_i2c_probe(struct i2c_client *i2c) 369 { 370 struct max98371_priv *max98371; 371 int ret, reg; 372 373 max98371 = devm_kzalloc(&i2c->dev, 374 sizeof(*max98371), GFP_KERNEL); 375 if (!max98371) 376 return -ENOMEM; 377 378 i2c_set_clientdata(i2c, max98371); 379 max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap); 380 if (IS_ERR(max98371->regmap)) { 381 ret = PTR_ERR(max98371->regmap); 382 dev_err(&i2c->dev, 383 "Failed to allocate regmap: %d\n", ret); 384 return ret; 385 } 386 387 ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®); 388 if (ret < 0) { 389 dev_info(&i2c->dev, "device error %d\n", ret); 390 return ret; 391 } 392 dev_info(&i2c->dev, "device version %x\n", reg); 393 394 ret = devm_snd_soc_register_component(&i2c->dev, &max98371_component, 395 max98371_dai, ARRAY_SIZE(max98371_dai)); 396 if (ret < 0) { 397 dev_err(&i2c->dev, "Failed to register component: %d\n", ret); 398 return ret; 399 } 400 return ret; 401 } 402 403 static const struct i2c_device_id max98371_i2c_id[] = { 404 { "max98371", 0 }, 405 { } 406 }; 407 408 MODULE_DEVICE_TABLE(i2c, max98371_i2c_id); 409 410 #ifdef CONFIG_OF 411 static const struct of_device_id max98371_of_match[] = { 412 { .compatible = "maxim,max98371", }, 413 { } 414 }; 415 MODULE_DEVICE_TABLE(of, max98371_of_match); 416 #endif 417 418 static struct i2c_driver max98371_i2c_driver = { 419 .driver = { 420 .name = "max98371", 421 .of_match_table = of_match_ptr(max98371_of_match), 422 }, 423 .probe_new = max98371_i2c_probe, 424 .id_table = max98371_i2c_id, 425 }; 426 427 module_i2c_driver(max98371_i2c_driver); 428 429 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>"); 430 MODULE_DESCRIPTION("ALSA SoC MAX98371 driver"); 431 MODULE_LICENSE("GPL"); 432