1 /* 2 * max98371.c -- ALSA SoC Stereo MAX98371 driver 3 * 4 * Copyright 2015-16 Maxim Integrated Products 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/i2c.h> 12 #include <linux/module.h> 13 #include <linux/regmap.h> 14 #include <linux/slab.h> 15 #include <sound/pcm.h> 16 #include <sound/pcm_params.h> 17 #include <sound/soc.h> 18 #include <sound/tlv.h> 19 #include "max98371.h" 20 21 static const char *const monomix_text[] = { 22 "Left", "Right", "LeftRightDiv2", 23 }; 24 25 static const char *const hpf_cutoff_txt[] = { 26 "Disable", "DC Block", "50Hz", 27 "100Hz", "200Hz", "400Hz", "800Hz", 28 }; 29 30 static SOC_ENUM_SINGLE_DECL(max98371_monomix, MAX98371_MONOMIX_CFG, 0, 31 monomix_text); 32 33 static SOC_ENUM_SINGLE_DECL(max98371_hpf_cutoff, MAX98371_HPF, 0, 34 hpf_cutoff_txt); 35 36 static const DECLARE_TLV_DB_RANGE(max98371_dht_min_gain, 37 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), 38 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), 39 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), 40 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), 41 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), 42 10, 11, TLV_DB_SCALE_ITEM(1699, 101, 0), 43 ); 44 45 static const DECLARE_TLV_DB_RANGE(max98371_dht_max_gain, 46 0, 1, TLV_DB_SCALE_ITEM(537, 66, 0), 47 2, 3, TLV_DB_SCALE_ITEM(677, 82, 0), 48 4, 5, TLV_DB_SCALE_ITEM(852, 104, 0), 49 6, 7, TLV_DB_SCALE_ITEM(1072, 131, 0), 50 8, 9, TLV_DB_SCALE_ITEM(1350, 165, 0), 51 10, 11, TLV_DB_SCALE_ITEM(1699, 208, 0), 52 ); 53 54 static const DECLARE_TLV_DB_RANGE(max98371_dht_rot_gain, 55 0, 1, TLV_DB_SCALE_ITEM(-50, -50, 0), 56 2, 6, TLV_DB_SCALE_ITEM(-100, -100, 0), 57 7, 8, TLV_DB_SCALE_ITEM(-800, -200, 0), 58 9, 11, TLV_DB_SCALE_ITEM(-1200, -300, 0), 59 12, 13, TLV_DB_SCALE_ITEM(-2000, -200, 0), 60 14, 15, TLV_DB_SCALE_ITEM(-2500, -500, 0), 61 ); 62 63 static const struct reg_default max98371_reg[] = { 64 { 0x01, 0x00 }, 65 { 0x02, 0x00 }, 66 { 0x03, 0x00 }, 67 { 0x04, 0x00 }, 68 { 0x05, 0x00 }, 69 { 0x06, 0x00 }, 70 { 0x07, 0x00 }, 71 { 0x08, 0x00 }, 72 { 0x09, 0x00 }, 73 { 0x0A, 0x00 }, 74 { 0x10, 0x06 }, 75 { 0x11, 0x08 }, 76 { 0x14, 0x80 }, 77 { 0x15, 0x00 }, 78 { 0x16, 0x00 }, 79 { 0x18, 0x00 }, 80 { 0x19, 0x00 }, 81 { 0x1C, 0x00 }, 82 { 0x1D, 0x00 }, 83 { 0x1E, 0x00 }, 84 { 0x1F, 0x00 }, 85 { 0x20, 0x00 }, 86 { 0x21, 0x00 }, 87 { 0x22, 0x00 }, 88 { 0x23, 0x00 }, 89 { 0x24, 0x00 }, 90 { 0x25, 0x00 }, 91 { 0x26, 0x00 }, 92 { 0x27, 0x00 }, 93 { 0x28, 0x00 }, 94 { 0x29, 0x00 }, 95 { 0x2A, 0x00 }, 96 { 0x2B, 0x00 }, 97 { 0x2C, 0x00 }, 98 { 0x2D, 0x00 }, 99 { 0x2E, 0x0B }, 100 { 0x31, 0x00 }, 101 { 0x32, 0x18 }, 102 { 0x33, 0x00 }, 103 { 0x34, 0x00 }, 104 { 0x36, 0x00 }, 105 { 0x37, 0x00 }, 106 { 0x38, 0x00 }, 107 { 0x39, 0x00 }, 108 { 0x3A, 0x00 }, 109 { 0x3B, 0x00 }, 110 { 0x3C, 0x00 }, 111 { 0x3D, 0x00 }, 112 { 0x3E, 0x00 }, 113 { 0x3F, 0x00 }, 114 { 0x40, 0x00 }, 115 { 0x41, 0x00 }, 116 { 0x42, 0x00 }, 117 { 0x43, 0x00 }, 118 { 0x4A, 0x00 }, 119 { 0x4B, 0x00 }, 120 { 0x4C, 0x00 }, 121 { 0x4D, 0x00 }, 122 { 0x4E, 0x00 }, 123 { 0x50, 0x00 }, 124 { 0x51, 0x00 }, 125 { 0x55, 0x00 }, 126 { 0x58, 0x00 }, 127 { 0x59, 0x00 }, 128 { 0x5C, 0x00 }, 129 { 0xFF, 0x43 }, 130 }; 131 132 static bool max98371_volatile_register(struct device *dev, unsigned int reg) 133 { 134 switch (reg) { 135 case MAX98371_IRQ_CLEAR1: 136 case MAX98371_IRQ_CLEAR2: 137 case MAX98371_IRQ_CLEAR3: 138 case MAX98371_VERSION: 139 return true; 140 default: 141 return false; 142 } 143 } 144 145 static bool max98371_readable_register(struct device *dev, unsigned int reg) 146 { 147 switch (reg) { 148 case MAX98371_SOFT_RESET: 149 return false; 150 default: 151 return true; 152 } 153 }; 154 155 static const DECLARE_TLV_DB_RANGE(max98371_gain_tlv, 156 0, 7, TLV_DB_SCALE_ITEM(0, 50, 0), 157 8, 10, TLV_DB_SCALE_ITEM(400, 100, 0) 158 ); 159 160 static const DECLARE_TLV_DB_RANGE(max98371_noload_gain_tlv, 161 0, 11, TLV_DB_SCALE_ITEM(950, 100, 0), 162 ); 163 164 static const DECLARE_TLV_DB_SCALE(digital_tlv, -6300, 50, 1); 165 166 static const struct snd_kcontrol_new max98371_snd_controls[] = { 167 SOC_SINGLE_TLV("Speaker Volume", MAX98371_GAIN, 168 MAX98371_GAIN_SHIFT, (1<<MAX98371_GAIN_WIDTH)-1, 0, 169 max98371_gain_tlv), 170 SOC_SINGLE_TLV("Digital Volume", MAX98371_DIGITAL_GAIN, 0, 171 (1<<MAX98371_DIGITAL_GAIN_WIDTH)-1, 1, digital_tlv), 172 SOC_SINGLE_TLV("Speaker DHT Max Volume", MAX98371_GAIN, 173 0, (1<<MAX98371_DHT_MAX_WIDTH)-1, 0, 174 max98371_dht_max_gain), 175 SOC_SINGLE_TLV("Speaker DHT Min Volume", MAX98371_DHT_GAIN, 176 0, (1<<MAX98371_DHT_GAIN_WIDTH)-1, 0, 177 max98371_dht_min_gain), 178 SOC_SINGLE_TLV("Speaker DHT Rotation Volume", MAX98371_DHT_GAIN, 179 0, (1<<MAX98371_DHT_ROT_WIDTH)-1, 0, 180 max98371_dht_rot_gain), 181 SOC_SINGLE("DHT Attack Step", MAX98371_DHT, MAX98371_DHT_STEP, 3, 0), 182 SOC_SINGLE("DHT Attack Rate", MAX98371_DHT, 0, 7, 0), 183 SOC_ENUM("Monomix Select", max98371_monomix), 184 SOC_ENUM("HPF Cutoff", max98371_hpf_cutoff), 185 }; 186 187 static int max98371_dai_set_fmt(struct snd_soc_dai *codec_dai, 188 unsigned int fmt) 189 { 190 struct snd_soc_codec *codec = codec_dai->codec; 191 struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec); 192 unsigned int val = 0; 193 194 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 195 case SND_SOC_DAIFMT_CBS_CFS: 196 break; 197 default: 198 dev_err(codec->dev, "DAI clock mode unsupported"); 199 return -EINVAL; 200 } 201 202 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 203 case SND_SOC_DAIFMT_I2S: 204 val |= 0; 205 break; 206 case SND_SOC_DAIFMT_RIGHT_J: 207 val |= MAX98371_DAI_RIGHT; 208 break; 209 case SND_SOC_DAIFMT_LEFT_J: 210 val |= MAX98371_DAI_LEFT; 211 break; 212 default: 213 dev_err(codec->dev, "DAI wrong mode unsupported"); 214 return -EINVAL; 215 } 216 regmap_update_bits(max98371->regmap, MAX98371_FMT, 217 MAX98371_FMT_MODE_MASK, val); 218 return 0; 219 } 220 221 static int max98371_dai_hw_params(struct snd_pcm_substream *substream, 222 struct snd_pcm_hw_params *params, 223 struct snd_soc_dai *dai) 224 { 225 struct snd_soc_codec *codec = dai->codec; 226 struct max98371_priv *max98371 = snd_soc_codec_get_drvdata(codec); 227 int blr_clk_ratio, ch_size, channels = params_channels(params); 228 int rate = params_rate(params); 229 230 switch (params_format(params)) { 231 case SNDRV_PCM_FORMAT_S8: 232 regmap_update_bits(max98371->regmap, MAX98371_FMT, 233 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); 234 ch_size = 8; 235 break; 236 case SNDRV_PCM_FORMAT_S16_LE: 237 regmap_update_bits(max98371->regmap, MAX98371_FMT, 238 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_16); 239 ch_size = 16; 240 break; 241 case SNDRV_PCM_FORMAT_S24_LE: 242 regmap_update_bits(max98371->regmap, MAX98371_FMT, 243 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); 244 ch_size = 24; 245 break; 246 case SNDRV_PCM_FORMAT_S32_LE: 247 regmap_update_bits(max98371->regmap, MAX98371_FMT, 248 MAX98371_FMT_MASK, MAX98371_DAI_CHANSZ_32); 249 ch_size = 32; 250 break; 251 default: 252 return -EINVAL; 253 } 254 255 /* BCLK/LRCLK ratio calculation */ 256 blr_clk_ratio = channels * ch_size; 257 switch (blr_clk_ratio) { 258 case 32: 259 regmap_update_bits(max98371->regmap, 260 MAX98371_DAI_CLK, 261 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_32); 262 break; 263 case 48: 264 regmap_update_bits(max98371->regmap, 265 MAX98371_DAI_CLK, 266 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_48); 267 break; 268 case 64: 269 regmap_update_bits(max98371->regmap, 270 MAX98371_DAI_CLK, 271 MAX98371_DAI_BSEL_MASK, MAX98371_DAI_BSEL_64); 272 break; 273 default: 274 return -EINVAL; 275 } 276 277 switch (rate) { 278 case 32000: 279 regmap_update_bits(max98371->regmap, 280 MAX98371_SPK_SR, 281 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_32); 282 break; 283 case 44100: 284 regmap_update_bits(max98371->regmap, 285 MAX98371_SPK_SR, 286 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_44); 287 break; 288 case 48000: 289 regmap_update_bits(max98371->regmap, 290 MAX98371_SPK_SR, 291 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_48); 292 break; 293 case 88200: 294 regmap_update_bits(max98371->regmap, 295 MAX98371_SPK_SR, 296 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_88); 297 break; 298 case 96000: 299 regmap_update_bits(max98371->regmap, 300 MAX98371_SPK_SR, 301 MAX98371_SPK_SR_MASK, MAX98371_SPK_SR_96); 302 break; 303 default: 304 return -EINVAL; 305 } 306 307 /* enabling both the RX channels*/ 308 regmap_update_bits(max98371->regmap, MAX98371_MONOMIX_SRC, 309 MAX98371_MONOMIX_SRC_MASK, MONOMIX_RX_0_1); 310 regmap_update_bits(max98371->regmap, MAX98371_DAI_CHANNEL, 311 MAX98371_CHANNEL_MASK, MAX98371_CHANNEL_MASK); 312 return 0; 313 } 314 315 static const struct snd_soc_dapm_widget max98371_dapm_widgets[] = { 316 SND_SOC_DAPM_DAC("DAC", NULL, MAX98371_SPK_ENABLE, 0, 0), 317 SND_SOC_DAPM_SUPPLY("Global Enable", MAX98371_GLOBAL_ENABLE, 318 0, 0, NULL, 0), 319 SND_SOC_DAPM_OUTPUT("SPK_OUT"), 320 }; 321 322 static const struct snd_soc_dapm_route max98371_audio_map[] = { 323 {"DAC", NULL, "HiFi Playback"}, 324 {"SPK_OUT", NULL, "DAC"}, 325 {"SPK_OUT", NULL, "Global Enable"}, 326 }; 327 328 #define MAX98371_RATES SNDRV_PCM_RATE_8000_48000 329 #define MAX98371_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE | \ 330 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) 331 332 static const struct snd_soc_dai_ops max98371_dai_ops = { 333 .set_fmt = max98371_dai_set_fmt, 334 .hw_params = max98371_dai_hw_params, 335 }; 336 337 static struct snd_soc_dai_driver max98371_dai[] = { 338 { 339 .name = "max98371-aif1", 340 .playback = { 341 .stream_name = "HiFi Playback", 342 .channels_min = 1, 343 .channels_max = 2, 344 .rates = SNDRV_PCM_RATE_8000_48000, 345 .formats = MAX98371_FORMATS, 346 }, 347 .ops = &max98371_dai_ops, 348 } 349 }; 350 351 static const struct snd_soc_codec_driver max98371_codec = { 352 .controls = max98371_snd_controls, 353 .num_controls = ARRAY_SIZE(max98371_snd_controls), 354 .dapm_routes = max98371_audio_map, 355 .num_dapm_routes = ARRAY_SIZE(max98371_audio_map), 356 .dapm_widgets = max98371_dapm_widgets, 357 .num_dapm_widgets = ARRAY_SIZE(max98371_dapm_widgets), 358 }; 359 360 static const struct regmap_config max98371_regmap = { 361 .reg_bits = 8, 362 .val_bits = 8, 363 .max_register = MAX98371_VERSION, 364 .reg_defaults = max98371_reg, 365 .num_reg_defaults = ARRAY_SIZE(max98371_reg), 366 .volatile_reg = max98371_volatile_register, 367 .readable_reg = max98371_readable_register, 368 .cache_type = REGCACHE_RBTREE, 369 }; 370 371 static int max98371_i2c_probe(struct i2c_client *i2c, 372 const struct i2c_device_id *id) 373 { 374 struct max98371_priv *max98371; 375 int ret, reg; 376 377 max98371 = devm_kzalloc(&i2c->dev, 378 sizeof(*max98371), GFP_KERNEL); 379 if (!max98371) 380 return -ENOMEM; 381 382 i2c_set_clientdata(i2c, max98371); 383 max98371->regmap = devm_regmap_init_i2c(i2c, &max98371_regmap); 384 if (IS_ERR(max98371->regmap)) { 385 ret = PTR_ERR(max98371->regmap); 386 dev_err(&i2c->dev, 387 "Failed to allocate regmap: %d\n", ret); 388 return ret; 389 } 390 391 ret = regmap_read(max98371->regmap, MAX98371_VERSION, ®); 392 if (ret < 0) { 393 dev_info(&i2c->dev, "device error %d\n", ret); 394 return ret; 395 } 396 dev_info(&i2c->dev, "device version %x\n", reg); 397 398 ret = snd_soc_register_codec(&i2c->dev, &max98371_codec, 399 max98371_dai, ARRAY_SIZE(max98371_dai)); 400 if (ret < 0) { 401 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret); 402 return ret; 403 } 404 return ret; 405 } 406 407 static int max98371_i2c_remove(struct i2c_client *client) 408 { 409 snd_soc_unregister_codec(&client->dev); 410 return 0; 411 } 412 413 static const struct i2c_device_id max98371_i2c_id[] = { 414 { "max98371", 0 }, 415 }; 416 417 MODULE_DEVICE_TABLE(i2c, max98371_i2c_id); 418 419 static const struct of_device_id max98371_of_match[] = { 420 { .compatible = "maxim,max98371", }, 421 { } 422 }; 423 MODULE_DEVICE_TABLE(of, max98371_of_match); 424 425 static struct i2c_driver max98371_i2c_driver = { 426 .driver = { 427 .name = "max98371", 428 .owner = THIS_MODULE, 429 .pm = NULL, 430 .of_match_table = of_match_ptr(max98371_of_match), 431 }, 432 .probe = max98371_i2c_probe, 433 .remove = max98371_i2c_remove, 434 .id_table = max98371_i2c_id, 435 }; 436 437 module_i2c_driver(max98371_i2c_driver); 438 439 MODULE_AUTHOR("anish kumar <yesanishhere@gmail.com>"); 440 MODULE_DESCRIPTION("ALSA SoC MAX98371 driver"); 441 MODULE_LICENSE("GPL"); 442