1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // MAX9867 ALSA SoC codec driver 4 // 5 // Copyright 2013-2015 Maxim Integrated Products 6 // Copyright 2018 Ladislav Michl <ladis@linux-mips.org> 7 // 8 9 #include <linux/delay.h> 10 #include <linux/i2c.h> 11 #include <linux/module.h> 12 #include <linux/regmap.h> 13 #include <sound/pcm_params.h> 14 #include <sound/soc.h> 15 #include <sound/tlv.h> 16 #include "max9867.h" 17 18 struct max9867_priv { 19 struct regmap *regmap; 20 const struct snd_pcm_hw_constraint_list *constraints; 21 unsigned int sysclk, pclk; 22 bool provider, dsp_a; 23 unsigned int adc_dac_active; 24 }; 25 26 static const char *const max9867_spmode[] = { 27 "Stereo Diff", "Mono Diff", 28 "Stereo Cap", "Mono Cap", 29 "Stereo Single", "Mono Single", 30 "Stereo Single Fast", "Mono Single Fast" 31 }; 32 static const char *const max9867_filter_text[] = {"IIR", "FIR"}; 33 34 static const char *const max9867_adc_dac_filter_text[] = { 35 "Disabled", 36 "Elliptical/16/256", 37 "Butterworth/16/500", 38 "Elliptical/8/256", 39 "Butterworth/8/500", 40 "Butterworth/8-24" 41 }; 42 43 enum max9867_adc_dac { 44 MAX9867_ADC_LEFT, 45 MAX9867_ADC_RIGHT, 46 MAX9867_DAC_LEFT, 47 MAX9867_DAC_RIGHT, 48 }; 49 50 static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w, 51 struct snd_kcontrol *kcontrol, int event) 52 { 53 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 54 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 55 enum max9867_adc_dac adc_dac; 56 57 if (!strcmp(w->name, "ADCL")) 58 adc_dac = MAX9867_ADC_LEFT; 59 else if (!strcmp(w->name, "ADCR")) 60 adc_dac = MAX9867_ADC_RIGHT; 61 else if (!strcmp(w->name, "DACL")) 62 adc_dac = MAX9867_DAC_LEFT; 63 else if (!strcmp(w->name, "DACR")) 64 adc_dac = MAX9867_DAC_RIGHT; 65 else 66 return 0; 67 68 if (SND_SOC_DAPM_EVENT_ON(event)) 69 max9867->adc_dac_active |= BIT(adc_dac); 70 else if (SND_SOC_DAPM_EVENT_OFF(event)) 71 max9867->adc_dac_active &= ~BIT(adc_dac); 72 73 return 0; 74 } 75 76 static int max9867_filter_get(struct snd_kcontrol *kcontrol, 77 struct snd_ctl_elem_value *ucontrol) 78 { 79 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 80 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 81 unsigned int reg; 82 int ret; 83 84 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®); 85 if (ret) 86 return -EINVAL; 87 88 if (reg & MAX9867_CODECFLTR_MODE) 89 ucontrol->value.enumerated.item[0] = 1; 90 else 91 ucontrol->value.enumerated.item[0] = 0; 92 93 return 0; 94 } 95 96 static int max9867_filter_set(struct snd_kcontrol *kcontrol, 97 struct snd_ctl_elem_value *ucontrol) 98 { 99 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 100 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 101 unsigned int reg, mode = ucontrol->value.enumerated.item[0]; 102 int ret; 103 104 if (mode > 1) 105 return -EINVAL; 106 107 /* don't allow change if ADC/DAC active */ 108 if (max9867->adc_dac_active) 109 return -EBUSY; 110 111 /* read current filter mode */ 112 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®); 113 if (ret) 114 return -EINVAL; 115 116 if (mode) 117 mode = MAX9867_CODECFLTR_MODE; 118 119 /* check if change is needed */ 120 if ((reg & MAX9867_CODECFLTR_MODE) == mode) 121 return 0; 122 123 /* shutdown codec before switching filter mode */ 124 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN, 125 MAX9867_PWRMAN_SHDN, 0); 126 127 /* switch filter mode */ 128 regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR, 129 MAX9867_CODECFLTR_MODE, mode); 130 131 /* out of shutdown now */ 132 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN, 133 MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN); 134 135 return 0; 136 } 137 138 static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text); 139 static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0, 140 max9867_adc_dac_filter_text); 141 static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4, 142 max9867_adc_dac_filter_text); 143 static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0, 144 max9867_spmode); 145 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv, 146 0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1), 147 3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0), 148 18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0), 149 26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0), 150 35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0), 151 ); 152 static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0); 153 static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0); 154 static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0); 155 static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0); 156 static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0); 157 static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv, 158 0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1), 159 3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0), 160 ); 161 162 static const struct snd_kcontrol_new max9867_snd_controls[] = { 163 SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL, 164 MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv), 165 SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL, 166 MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv), 167 SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN, 168 MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv), 169 SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN, 170 MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv), 171 SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1), 172 SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1, 173 max9867_dac_tlv), 174 SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0, 175 max9867_dacboost_tlv), 176 SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1, 177 max9867_adc_tlv), 178 SOC_ENUM("Speaker Mode", max9867_spkmode), 179 SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0), 180 SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0), 181 SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set), 182 SOC_ENUM("ADC Filter", max9867_adc_filter), 183 SOC_ENUM("DAC Filter", max9867_dac_filter), 184 SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0), 185 }; 186 187 /* Input mixer */ 188 static const struct snd_kcontrol_new max9867_input_mixer_controls[] = { 189 SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0), 190 SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0), 191 }; 192 193 /* Output mixer */ 194 static const struct snd_kcontrol_new max9867_output_mixer_controls[] = { 195 SOC_DAPM_DOUBLE_R("Line Bypass Switch", 196 MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1), 197 }; 198 199 /* Sidetone mixer */ 200 static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = { 201 SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0), 202 }; 203 204 /* Line out switch */ 205 static const struct snd_kcontrol_new max9867_line_out_control = 206 SOC_DAPM_DOUBLE_R("Switch", 207 MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1); 208 209 /* DMIC mux */ 210 static const char *const dmic_mux_text[] = { 211 "ADC", "DMIC" 212 }; 213 static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum, 214 MAX9867_MICCONFIG, 5, dmic_mux_text); 215 static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum, 216 MAX9867_MICCONFIG, 4, dmic_mux_text); 217 static const struct snd_kcontrol_new max9867_left_dmic_mux = 218 SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum); 219 static const struct snd_kcontrol_new max9867_right_dmic_mux = 220 SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum); 221 222 static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = { 223 SND_SOC_DAPM_INPUT("MICL"), 224 SND_SOC_DAPM_INPUT("MICR"), 225 SND_SOC_DAPM_INPUT("DMICL"), 226 SND_SOC_DAPM_INPUT("DMICR"), 227 SND_SOC_DAPM_INPUT("LINL"), 228 SND_SOC_DAPM_INPUT("LINR"), 229 230 SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), 231 SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), 232 SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0, 233 max9867_input_mixer_controls, 234 ARRAY_SIZE(max9867_input_mixer_controls)), 235 SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0, 236 &max9867_left_dmic_mux), 237 SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0, 238 &max9867_right_dmic_mux), 239 SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0, 240 max9867_adc_dac_event, 241 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 242 SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0, 243 max9867_adc_dac_event, 244 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 245 246 SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0, 247 max9867_sidetone_mixer_controls, 248 ARRAY_SIZE(max9867_sidetone_mixer_controls)), 249 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0, 250 max9867_output_mixer_controls, 251 ARRAY_SIZE(max9867_output_mixer_controls)), 252 SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0, 253 max9867_adc_dac_event, 254 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 255 SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0, 256 max9867_adc_dac_event, 257 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 258 SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0, 259 &max9867_line_out_control), 260 SND_SOC_DAPM_OUTPUT("LOUT"), 261 SND_SOC_DAPM_OUTPUT("ROUT"), 262 }; 263 264 static const struct snd_soc_dapm_route max9867_audio_map[] = { 265 {"Left Line Input", NULL, "LINL"}, 266 {"Right Line Input", NULL, "LINR"}, 267 {"Input Mixer", "Mic Capture Switch", "MICL"}, 268 {"Input Mixer", "Mic Capture Switch", "MICR"}, 269 {"Input Mixer", "Line Capture Switch", "Left Line Input"}, 270 {"Input Mixer", "Line Capture Switch", "Right Line Input"}, 271 {"DMICL Mux", "DMIC", "DMICL"}, 272 {"DMICR Mux", "DMIC", "DMICR"}, 273 {"DMICL Mux", "ADC", "Input Mixer"}, 274 {"DMICR Mux", "ADC", "Input Mixer"}, 275 {"ADCL", NULL, "DMICL Mux"}, 276 {"ADCR", NULL, "DMICR Mux"}, 277 278 {"Digital", "Sidetone Switch", "ADCL"}, 279 {"Digital", "Sidetone Switch", "ADCR"}, 280 {"DACL", NULL, "Digital"}, 281 {"DACR", NULL, "Digital"}, 282 283 {"Output Mixer", "Line Bypass Switch", "Left Line Input"}, 284 {"Output Mixer", "Line Bypass Switch", "Right Line Input"}, 285 {"Output Mixer", NULL, "DACL"}, 286 {"Output Mixer", NULL, "DACR"}, 287 {"Master Playback", "Switch", "Output Mixer"}, 288 {"LOUT", NULL, "Master Playback"}, 289 {"ROUT", NULL, "Master Playback"}, 290 }; 291 292 static const unsigned int max9867_rates_44k1[] = { 293 11025, 22050, 44100, 294 }; 295 296 static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = { 297 .list = max9867_rates_44k1, 298 .count = ARRAY_SIZE(max9867_rates_44k1), 299 }; 300 301 static const unsigned int max9867_rates_48k[] = { 302 8000, 16000, 32000, 48000, 303 }; 304 305 static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = { 306 .list = max9867_rates_48k, 307 .count = ARRAY_SIZE(max9867_rates_48k), 308 }; 309 310 static int max9867_startup(struct snd_pcm_substream *substream, 311 struct snd_soc_dai *dai) 312 { 313 struct max9867_priv *max9867 = 314 snd_soc_component_get_drvdata(dai->component); 315 316 if (max9867->constraints) 317 snd_pcm_hw_constraint_list(substream->runtime, 0, 318 SNDRV_PCM_HW_PARAM_RATE, max9867->constraints); 319 320 return 0; 321 } 322 323 static int max9867_dai_hw_params(struct snd_pcm_substream *substream, 324 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 325 { 326 int value; 327 unsigned long int rate, ratio; 328 struct snd_soc_component *component = dai->component; 329 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 330 unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params), 331 max9867->pclk); 332 333 /* set up the ni value */ 334 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, 335 MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8); 336 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, 337 MAX9867_NI_LOW_MASK, 0x00FF & ni); 338 if (max9867->provider) { 339 if (max9867->dsp_a) { 340 value = MAX9867_IFC1B_48X; 341 } else { 342 rate = params_rate(params) * 2 * params_width(params); 343 ratio = max9867->pclk / rate; 344 switch (params_width(params)) { 345 case 8: 346 case 16: 347 switch (ratio) { 348 case 2: 349 value = MAX9867_IFC1B_PCLK_2; 350 break; 351 case 4: 352 value = MAX9867_IFC1B_PCLK_4; 353 break; 354 case 8: 355 value = MAX9867_IFC1B_PCLK_8; 356 break; 357 case 16: 358 value = MAX9867_IFC1B_PCLK_16; 359 break; 360 default: 361 return -EINVAL; 362 } 363 break; 364 case 24: 365 value = MAX9867_IFC1B_48X; 366 break; 367 case 32: 368 value = MAX9867_IFC1B_64X; 369 break; 370 default: 371 return -EINVAL; 372 } 373 } 374 regmap_update_bits(max9867->regmap, MAX9867_IFC1B, 375 MAX9867_IFC1B_BCLK_MASK, value); 376 } else { 377 /* 378 * digital pll locks on to any externally supplied LRCLK signal 379 * and also enable rapid lock mode. 380 */ 381 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, 382 MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK); 383 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, 384 MAX9867_PLL, MAX9867_PLL); 385 } 386 return 0; 387 } 388 389 static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction) 390 { 391 struct snd_soc_component *component = dai->component; 392 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 393 394 return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL, 395 1 << 6, !!mute << 6); 396 } 397 398 static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai, 399 int clk_id, unsigned int freq, int dir) 400 { 401 struct snd_soc_component *component = codec_dai->component; 402 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 403 int value = 0; 404 405 /* Set the prescaler based on the master clock frequency*/ 406 if (freq >= 10000000 && freq <= 20000000) { 407 value |= MAX9867_PSCLK_10_20; 408 max9867->pclk = freq; 409 } else if (freq >= 20000000 && freq <= 40000000) { 410 value |= MAX9867_PSCLK_20_40; 411 max9867->pclk = freq / 2; 412 } else if (freq >= 40000000 && freq <= 60000000) { 413 value |= MAX9867_PSCLK_40_60; 414 max9867->pclk = freq / 4; 415 } else { 416 dev_err(component->dev, 417 "Invalid clock frequency %uHz (required 10-60MHz)\n", 418 freq); 419 return -EINVAL; 420 } 421 if (freq % 48000 == 0) 422 max9867->constraints = &max9867_constraints_48k; 423 else if (freq % 44100 == 0) 424 max9867->constraints = &max9867_constraints_44k1; 425 else 426 dev_warn(component->dev, 427 "Unable to set exact rate with %uHz clock frequency\n", 428 freq); 429 max9867->sysclk = freq; 430 value = value << MAX9867_PSCLK_SHIFT; 431 /* exact integer mode is not supported */ 432 value &= ~MAX9867_FREQ_MASK; 433 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, 434 MAX9867_PSCLK_MASK, value); 435 return 0; 436 } 437 438 static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai, 439 unsigned int fmt) 440 { 441 struct snd_soc_component *component = codec_dai->component; 442 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 443 u8 iface1A, iface1B; 444 445 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 446 case SND_SOC_DAIFMT_CBP_CFP: 447 max9867->provider = true; 448 iface1A = MAX9867_MASTER; 449 iface1B = MAX9867_IFC1B_48X; 450 break; 451 case SND_SOC_DAIFMT_CBC_CFC: 452 max9867->provider = false; 453 iface1A = iface1B = 0; 454 break; 455 default: 456 return -EINVAL; 457 } 458 459 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 460 case SND_SOC_DAIFMT_I2S: 461 max9867->dsp_a = false; 462 iface1A |= MAX9867_I2S_DLY; 463 break; 464 case SND_SOC_DAIFMT_DSP_A: 465 max9867->dsp_a = true; 466 iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ; 467 break; 468 default: 469 return -EINVAL; 470 } 471 472 /* Clock inversion bits, BCI and WCI */ 473 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 474 case SND_SOC_DAIFMT_NB_NF: 475 break; 476 case SND_SOC_DAIFMT_IB_IF: 477 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE; 478 break; 479 case SND_SOC_DAIFMT_IB_NF: 480 iface1A |= MAX9867_BCI_MODE; 481 break; 482 case SND_SOC_DAIFMT_NB_IF: 483 iface1A |= MAX9867_WCI_MODE; 484 break; 485 default: 486 return -EINVAL; 487 } 488 489 regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A); 490 regmap_update_bits(max9867->regmap, MAX9867_IFC1B, 491 MAX9867_IFC1B_BCLK_MASK, iface1B); 492 493 return 0; 494 } 495 496 static const struct snd_soc_dai_ops max9867_dai_ops = { 497 .set_sysclk = max9867_set_dai_sysclk, 498 .set_fmt = max9867_dai_set_fmt, 499 .mute_stream = max9867_mute, 500 .startup = max9867_startup, 501 .hw_params = max9867_dai_hw_params, 502 .no_capture_mute = 1, 503 }; 504 505 static struct snd_soc_dai_driver max9867_dai[] = { 506 { 507 .name = "max9867-aif1", 508 .playback = { 509 .stream_name = "HiFi Playback", 510 .channels_min = 2, 511 .channels_max = 2, 512 .rates = SNDRV_PCM_RATE_8000_48000, 513 .formats = SNDRV_PCM_FMTBIT_S16_LE, 514 }, 515 .capture = { 516 .stream_name = "HiFi Capture", 517 .channels_min = 2, 518 .channels_max = 2, 519 .rates = SNDRV_PCM_RATE_8000_48000, 520 .formats = SNDRV_PCM_FMTBIT_S16_LE, 521 }, 522 .ops = &max9867_dai_ops, 523 .symmetric_rate = 1, 524 } 525 }; 526 527 #ifdef CONFIG_PM 528 static int max9867_suspend(struct snd_soc_component *component) 529 { 530 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF); 531 532 return 0; 533 } 534 535 static int max9867_resume(struct snd_soc_component *component) 536 { 537 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY); 538 539 return 0; 540 } 541 #else 542 #define max9867_suspend NULL 543 #define max9867_resume NULL 544 #endif 545 546 static int max9867_set_bias_level(struct snd_soc_component *component, 547 enum snd_soc_bias_level level) 548 { 549 int err; 550 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 551 552 switch (level) { 553 case SND_SOC_BIAS_STANDBY: 554 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { 555 err = regcache_sync(max9867->regmap); 556 if (err) 557 return err; 558 559 err = regmap_write(max9867->regmap, 560 MAX9867_PWRMAN, 0xff); 561 if (err) 562 return err; 563 } 564 break; 565 case SND_SOC_BIAS_OFF: 566 err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0); 567 if (err) 568 return err; 569 570 regcache_mark_dirty(max9867->regmap); 571 break; 572 default: 573 break; 574 } 575 576 return 0; 577 } 578 579 static const struct snd_soc_component_driver max9867_component = { 580 .controls = max9867_snd_controls, 581 .num_controls = ARRAY_SIZE(max9867_snd_controls), 582 .dapm_routes = max9867_audio_map, 583 .num_dapm_routes = ARRAY_SIZE(max9867_audio_map), 584 .dapm_widgets = max9867_dapm_widgets, 585 .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets), 586 .suspend = max9867_suspend, 587 .resume = max9867_resume, 588 .set_bias_level = max9867_set_bias_level, 589 .idle_bias_on = 1, 590 .use_pmdown_time = 1, 591 .endianness = 1, 592 }; 593 594 static bool max9867_volatile_register(struct device *dev, unsigned int reg) 595 { 596 switch (reg) { 597 case MAX9867_STATUS: 598 case MAX9867_JACKSTATUS: 599 case MAX9867_AUXHIGH: 600 case MAX9867_AUXLOW: 601 return true; 602 default: 603 return false; 604 } 605 } 606 607 static const struct regmap_config max9867_regmap = { 608 .reg_bits = 8, 609 .val_bits = 8, 610 .max_register = MAX9867_REVISION, 611 .volatile_reg = max9867_volatile_register, 612 .cache_type = REGCACHE_RBTREE, 613 }; 614 615 static int max9867_i2c_probe(struct i2c_client *i2c) 616 { 617 struct max9867_priv *max9867; 618 int ret, reg; 619 620 max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL); 621 if (!max9867) 622 return -ENOMEM; 623 624 i2c_set_clientdata(i2c, max9867); 625 max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap); 626 if (IS_ERR(max9867->regmap)) { 627 ret = PTR_ERR(max9867->regmap); 628 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret); 629 return ret; 630 } 631 ret = regmap_read(max9867->regmap, MAX9867_REVISION, ®); 632 if (ret < 0) { 633 dev_err(&i2c->dev, "Failed to read: %d\n", ret); 634 return ret; 635 } 636 dev_info(&i2c->dev, "device revision: %x\n", reg); 637 ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component, 638 max9867_dai, ARRAY_SIZE(max9867_dai)); 639 if (ret < 0) 640 dev_err(&i2c->dev, "Failed to register component: %d\n", ret); 641 return ret; 642 } 643 644 static const struct i2c_device_id max9867_i2c_id[] = { 645 { "max9867", 0 }, 646 { } 647 }; 648 MODULE_DEVICE_TABLE(i2c, max9867_i2c_id); 649 650 #ifdef CONFIG_OF 651 static const struct of_device_id max9867_of_match[] = { 652 { .compatible = "maxim,max9867", }, 653 { } 654 }; 655 MODULE_DEVICE_TABLE(of, max9867_of_match); 656 #endif 657 658 static struct i2c_driver max9867_i2c_driver = { 659 .driver = { 660 .name = "max9867", 661 .of_match_table = of_match_ptr(max9867_of_match), 662 }, 663 .probe_new = max9867_i2c_probe, 664 .id_table = max9867_i2c_id, 665 }; 666 667 module_i2c_driver(max9867_i2c_driver); 668 669 MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>"); 670 MODULE_DESCRIPTION("ASoC MAX9867 driver"); 671 MODULE_LICENSE("GPL"); 672