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/clk.h> 10#include <linux/delay.h> 11#include <linux/i2c.h> 12#include <linux/module.h> 13#include <linux/regmap.h> 14#include <sound/pcm_params.h> 15#include <sound/soc.h> 16#include <sound/tlv.h> 17#include "max9867.h" 18 19struct max9867_priv { 20 struct clk *mclk; 21 struct regmap *regmap; 22 const struct snd_pcm_hw_constraint_list *constraints; 23 unsigned int sysclk, pclk; 24 bool provider, dsp_a; 25 unsigned int adc_dac_active; 26}; 27 28static const char *const max9867_spmode[] = { 29 "Stereo Diff", "Mono Diff", 30 "Stereo Cap", "Mono Cap", 31 "Stereo Single", "Mono Single", 32 "Stereo Single Fast", "Mono Single Fast" 33}; 34static const char *const max9867_filter_text[] = {"IIR", "FIR"}; 35 36static const char *const max9867_adc_dac_filter_text[] = { 37 "Disabled", 38 "Elliptical/16/256", 39 "Butterworth/16/500", 40 "Elliptical/8/256", 41 "Butterworth/8/500", 42 "Butterworth/8-24" 43}; 44 45enum max9867_adc_dac { 46 MAX9867_ADC_LEFT, 47 MAX9867_ADC_RIGHT, 48 MAX9867_DAC_LEFT, 49 MAX9867_DAC_RIGHT, 50}; 51 52static int max9867_adc_dac_event(struct snd_soc_dapm_widget *w, 53 struct snd_kcontrol *kcontrol, int event) 54{ 55 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 56 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 57 enum max9867_adc_dac adc_dac; 58 59 if (!snd_soc_dapm_widget_name_cmp(w, "ADCL")) 60 adc_dac = MAX9867_ADC_LEFT; 61 else if (!snd_soc_dapm_widget_name_cmp(w, "ADCR")) 62 adc_dac = MAX9867_ADC_RIGHT; 63 else if (!snd_soc_dapm_widget_name_cmp(w, "DACL")) 64 adc_dac = MAX9867_DAC_LEFT; 65 else if (!snd_soc_dapm_widget_name_cmp(w, "DACR")) 66 adc_dac = MAX9867_DAC_RIGHT; 67 else 68 return 0; 69 70 if (SND_SOC_DAPM_EVENT_ON(event)) 71 max9867->adc_dac_active |= BIT(adc_dac); 72 else if (SND_SOC_DAPM_EVENT_OFF(event)) 73 max9867->adc_dac_active &= ~BIT(adc_dac); 74 75 return 0; 76} 77 78static int max9867_filter_get(struct snd_kcontrol *kcontrol, 79 struct snd_ctl_elem_value *ucontrol) 80{ 81 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 82 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 83 unsigned int reg; 84 int ret; 85 86 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®); 87 if (ret) 88 return -EINVAL; 89 90 if (reg & MAX9867_CODECFLTR_MODE) 91 ucontrol->value.enumerated.item[0] = 1; 92 else 93 ucontrol->value.enumerated.item[0] = 0; 94 95 return 0; 96} 97 98static int max9867_filter_set(struct snd_kcontrol *kcontrol, 99 struct snd_ctl_elem_value *ucontrol) 100{ 101 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 102 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 103 unsigned int reg, mode = ucontrol->value.enumerated.item[0]; 104 int ret; 105 106 if (mode > 1) 107 return -EINVAL; 108 109 /* don't allow change if ADC/DAC active */ 110 if (max9867->adc_dac_active) 111 return -EBUSY; 112 113 /* read current filter mode */ 114 ret = regmap_read(max9867->regmap, MAX9867_CODECFLTR, ®); 115 if (ret) 116 return -EINVAL; 117 118 if (mode) 119 mode = MAX9867_CODECFLTR_MODE; 120 121 /* check if change is needed */ 122 if ((reg & MAX9867_CODECFLTR_MODE) == mode) 123 return 0; 124 125 /* shutdown codec before switching filter mode */ 126 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN, 127 MAX9867_PWRMAN_SHDN, 0); 128 129 /* switch filter mode */ 130 regmap_update_bits(max9867->regmap, MAX9867_CODECFLTR, 131 MAX9867_CODECFLTR_MODE, mode); 132 133 /* out of shutdown now */ 134 regmap_update_bits(max9867->regmap, MAX9867_PWRMAN, 135 MAX9867_PWRMAN_SHDN, MAX9867_PWRMAN_SHDN); 136 137 return 0; 138} 139 140static SOC_ENUM_SINGLE_EXT_DECL(max9867_filter, max9867_filter_text); 141static SOC_ENUM_SINGLE_DECL(max9867_dac_filter, MAX9867_CODECFLTR, 0, 142 max9867_adc_dac_filter_text); 143static SOC_ENUM_SINGLE_DECL(max9867_adc_filter, MAX9867_CODECFLTR, 4, 144 max9867_adc_dac_filter_text); 145static SOC_ENUM_SINGLE_DECL(max9867_spkmode, MAX9867_MODECONFIG, 0, 146 max9867_spmode); 147static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_master_tlv, 148 0, 2, TLV_DB_SCALE_ITEM(-8600, 200, 1), 149 3, 17, TLV_DB_SCALE_ITEM(-7800, 400, 0), 150 18, 25, TLV_DB_SCALE_ITEM(-2000, 200, 0), 151 26, 34, TLV_DB_SCALE_ITEM( -500, 100, 0), 152 35, 40, TLV_DB_SCALE_ITEM( 350, 50, 0), 153); 154static DECLARE_TLV_DB_SCALE(max9867_mic_tlv, 0, 100, 0); 155static DECLARE_TLV_DB_SCALE(max9867_line_tlv, -600, 200, 0); 156static DECLARE_TLV_DB_SCALE(max9867_adc_tlv, -1200, 100, 0); 157static DECLARE_TLV_DB_SCALE(max9867_dac_tlv, -1500, 100, 0); 158static DECLARE_TLV_DB_SCALE(max9867_dacboost_tlv, 0, 600, 0); 159static const SNDRV_CTL_TLVD_DECLARE_DB_RANGE(max9867_micboost_tlv, 160 0, 2, TLV_DB_SCALE_ITEM(-2000, 2000, 1), 161 3, 3, TLV_DB_SCALE_ITEM(3000, 0, 0), 162); 163 164static const struct snd_kcontrol_new max9867_snd_controls[] = { 165 SOC_DOUBLE_R_TLV("Master Playback Volume", MAX9867_LEFTVOL, 166 MAX9867_RIGHTVOL, 0, 40, 1, max9867_master_tlv), 167 SOC_DOUBLE_R_TLV("Line Capture Volume", MAX9867_LEFTLINELVL, 168 MAX9867_RIGHTLINELVL, 0, 15, 1, max9867_line_tlv), 169 SOC_DOUBLE_R_TLV("Mic Capture Volume", MAX9867_LEFTMICGAIN, 170 MAX9867_RIGHTMICGAIN, 0, 20, 1, max9867_mic_tlv), 171 SOC_DOUBLE_R_TLV("Mic Boost Capture Volume", MAX9867_LEFTMICGAIN, 172 MAX9867_RIGHTMICGAIN, 5, 3, 0, max9867_micboost_tlv), 173 SOC_SINGLE("Digital Sidetone Volume", MAX9867_SIDETONE, 0, 31, 1), 174 SOC_SINGLE_TLV("Digital Playback Volume", MAX9867_DACLEVEL, 0, 15, 1, 175 max9867_dac_tlv), 176 SOC_SINGLE_TLV("Digital Boost Playback Volume", MAX9867_DACLEVEL, 4, 3, 0, 177 max9867_dacboost_tlv), 178 SOC_DOUBLE_TLV("Digital Capture Volume", MAX9867_ADCLEVEL, 4, 0, 15, 1, 179 max9867_adc_tlv), 180 SOC_ENUM("Speaker Mode", max9867_spkmode), 181 SOC_SINGLE("Volume Smoothing Switch", MAX9867_MODECONFIG, 6, 1, 0), 182 SOC_SINGLE("Line ZC Switch", MAX9867_MODECONFIG, 5, 1, 0), 183 SOC_ENUM_EXT("DSP Filter", max9867_filter, max9867_filter_get, max9867_filter_set), 184 SOC_ENUM("ADC Filter", max9867_adc_filter), 185 SOC_ENUM("DAC Filter", max9867_dac_filter), 186 SOC_SINGLE("Mono Playback Switch", MAX9867_IFC1B, 3, 1, 0), 187}; 188 189/* Input mixer */ 190static const struct snd_kcontrol_new max9867_input_mixer_controls[] = { 191 SOC_DAPM_DOUBLE("Line Capture Switch", MAX9867_INPUTCONFIG, 7, 5, 1, 0), 192 SOC_DAPM_DOUBLE("Mic Capture Switch", MAX9867_INPUTCONFIG, 6, 4, 1, 0), 193}; 194 195/* Output mixer */ 196static const struct snd_kcontrol_new max9867_output_mixer_controls[] = { 197 SOC_DAPM_DOUBLE_R("Line Bypass Switch", 198 MAX9867_LEFTLINELVL, MAX9867_RIGHTLINELVL, 6, 1, 1), 199}; 200 201/* Sidetone mixer */ 202static const struct snd_kcontrol_new max9867_sidetone_mixer_controls[] = { 203 SOC_DAPM_DOUBLE("Sidetone Switch", MAX9867_SIDETONE, 6, 7, 1, 0), 204}; 205 206/* Line out switch */ 207static const struct snd_kcontrol_new max9867_line_out_control = 208 SOC_DAPM_DOUBLE_R("Switch", 209 MAX9867_LEFTVOL, MAX9867_RIGHTVOL, 6, 1, 1); 210 211/* DMIC mux */ 212static const char *const dmic_mux_text[] = { 213 "ADC", "DMIC" 214}; 215static SOC_ENUM_SINGLE_DECL(left_dmic_mux_enum, 216 MAX9867_MICCONFIG, 5, dmic_mux_text); 217static SOC_ENUM_SINGLE_DECL(right_dmic_mux_enum, 218 MAX9867_MICCONFIG, 4, dmic_mux_text); 219static const struct snd_kcontrol_new max9867_left_dmic_mux = 220 SOC_DAPM_ENUM("DMICL Mux", left_dmic_mux_enum); 221static const struct snd_kcontrol_new max9867_right_dmic_mux = 222 SOC_DAPM_ENUM("DMICR Mux", right_dmic_mux_enum); 223 224static const struct snd_soc_dapm_widget max9867_dapm_widgets[] = { 225 SND_SOC_DAPM_INPUT("MICL"), 226 SND_SOC_DAPM_INPUT("MICR"), 227 SND_SOC_DAPM_INPUT("DMICL"), 228 SND_SOC_DAPM_INPUT("DMICR"), 229 SND_SOC_DAPM_INPUT("LINL"), 230 SND_SOC_DAPM_INPUT("LINR"), 231 232 SND_SOC_DAPM_PGA("Left Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), 233 SND_SOC_DAPM_PGA("Right Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), 234 SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0, 235 max9867_input_mixer_controls, 236 ARRAY_SIZE(max9867_input_mixer_controls)), 237 SND_SOC_DAPM_MUX("DMICL Mux", SND_SOC_NOPM, 0, 0, 238 &max9867_left_dmic_mux), 239 SND_SOC_DAPM_MUX("DMICR Mux", SND_SOC_NOPM, 0, 0, 240 &max9867_right_dmic_mux), 241 SND_SOC_DAPM_ADC_E("ADCL", "HiFi Capture", SND_SOC_NOPM, 0, 0, 242 max9867_adc_dac_event, 243 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 244 SND_SOC_DAPM_ADC_E("ADCR", "HiFi Capture", SND_SOC_NOPM, 0, 0, 245 max9867_adc_dac_event, 246 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 247 248 SND_SOC_DAPM_MIXER("Digital", SND_SOC_NOPM, 0, 0, 249 max9867_sidetone_mixer_controls, 250 ARRAY_SIZE(max9867_sidetone_mixer_controls)), 251 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", SND_SOC_NOPM, 0, 0, 252 max9867_output_mixer_controls, 253 ARRAY_SIZE(max9867_output_mixer_controls)), 254 SND_SOC_DAPM_DAC_E("DACL", "HiFi Playback", SND_SOC_NOPM, 0, 0, 255 max9867_adc_dac_event, 256 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 257 SND_SOC_DAPM_DAC_E("DACR", "HiFi Playback", SND_SOC_NOPM, 0, 0, 258 max9867_adc_dac_event, 259 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 260 SND_SOC_DAPM_SWITCH("Master Playback", SND_SOC_NOPM, 0, 0, 261 &max9867_line_out_control), 262 SND_SOC_DAPM_OUTPUT("LOUT"), 263 SND_SOC_DAPM_OUTPUT("ROUT"), 264}; 265 266static const struct snd_soc_dapm_route max9867_audio_map[] = { 267 {"Left Line Input", NULL, "LINL"}, 268 {"Right Line Input", NULL, "LINR"}, 269 {"Input Mixer", "Mic Capture Switch", "MICL"}, 270 {"Input Mixer", "Mic Capture Switch", "MICR"}, 271 {"Input Mixer", "Line Capture Switch", "Left Line Input"}, 272 {"Input Mixer", "Line Capture Switch", "Right Line Input"}, 273 {"DMICL Mux", "DMIC", "DMICL"}, 274 {"DMICR Mux", "DMIC", "DMICR"}, 275 {"DMICL Mux", "ADC", "Input Mixer"}, 276 {"DMICR Mux", "ADC", "Input Mixer"}, 277 {"ADCL", NULL, "DMICL Mux"}, 278 {"ADCR", NULL, "DMICR Mux"}, 279 280 {"Digital", "Sidetone Switch", "ADCL"}, 281 {"Digital", "Sidetone Switch", "ADCR"}, 282 {"DACL", NULL, "Digital"}, 283 {"DACR", NULL, "Digital"}, 284 285 {"Output Mixer", "Line Bypass Switch", "Left Line Input"}, 286 {"Output Mixer", "Line Bypass Switch", "Right Line Input"}, 287 {"Output Mixer", NULL, "DACL"}, 288 {"Output Mixer", NULL, "DACR"}, 289 {"Master Playback", "Switch", "Output Mixer"}, 290 {"LOUT", NULL, "Master Playback"}, 291 {"ROUT", NULL, "Master Playback"}, 292}; 293 294static const unsigned int max9867_rates_44k1[] = { 295 11025, 22050, 44100, 296}; 297 298static const struct snd_pcm_hw_constraint_list max9867_constraints_44k1 = { 299 .list = max9867_rates_44k1, 300 .count = ARRAY_SIZE(max9867_rates_44k1), 301}; 302 303static const unsigned int max9867_rates_48k[] = { 304 8000, 16000, 32000, 48000, 305}; 306 307static const struct snd_pcm_hw_constraint_list max9867_constraints_48k = { 308 .list = max9867_rates_48k, 309 .count = ARRAY_SIZE(max9867_rates_48k), 310}; 311 312static int max9867_startup(struct snd_pcm_substream *substream, 313 struct snd_soc_dai *dai) 314{ 315 struct max9867_priv *max9867 = 316 snd_soc_component_get_drvdata(dai->component); 317 318 if (max9867->constraints) 319 snd_pcm_hw_constraint_list(substream->runtime, 0, 320 SNDRV_PCM_HW_PARAM_RATE, max9867->constraints); 321 322 return 0; 323} 324 325static int max9867_dai_hw_params(struct snd_pcm_substream *substream, 326 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 327{ 328 int value, freq = 0; 329 unsigned long int rate, ratio; 330 struct snd_soc_component *component = dai->component; 331 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 332 unsigned int ni = DIV_ROUND_CLOSEST_ULL(96ULL * 0x10000 * params_rate(params), 333 max9867->pclk); 334 335 /* set up the ni value */ 336 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, 337 MAX9867_NI_HIGH_MASK, (0xFF00 & ni) >> 8); 338 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, 339 MAX9867_NI_LOW_MASK, 0x00FF & ni); 340 if (max9867->provider) { 341 if (max9867->dsp_a) { 342 value = MAX9867_IFC1B_48X; 343 } else { 344 rate = params_rate(params) * 2 * params_width(params); 345 ratio = max9867->pclk / rate; 346 switch (params_width(params)) { 347 case 8: 348 case 16: 349 switch (ratio) { 350 case 2: 351 value = MAX9867_IFC1B_PCLK_2; 352 break; 353 case 4: 354 value = MAX9867_IFC1B_PCLK_4; 355 break; 356 case 8: 357 value = MAX9867_IFC1B_PCLK_8; 358 break; 359 case 16: 360 value = MAX9867_IFC1B_PCLK_16; 361 break; 362 default: 363 return -EINVAL; 364 } 365 break; 366 case 24: 367 value = MAX9867_IFC1B_48X; 368 break; 369 case 32: 370 value = MAX9867_IFC1B_64X; 371 break; 372 default: 373 return -EINVAL; 374 } 375 } 376 regmap_update_bits(max9867->regmap, MAX9867_IFC1B, 377 MAX9867_IFC1B_BCLK_MASK, value); 378 379 /* Exact integer mode available for 8kHz and 16kHz sample rates 380 * and certain PCLK (prescaled MCLK) values. 381 */ 382 if (params_rate(params) == 8000 || 383 params_rate(params) == 16000) { 384 switch (max9867->pclk) { 385 case 12000000: 386 freq = 0x08; 387 break; 388 case 13000000: 389 freq = 0x0A; 390 break; 391 case 16000000: 392 freq = 0x0C; 393 break; 394 case 19200000: 395 freq = 0x0E; 396 break; 397 } 398 } 399 if (freq && params_rate(params) == 16000) 400 freq++; 401 402 /* If exact integer mode not available, the freq value 403 * remains zero, i.e. normal mode is used. 404 */ 405 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, 406 MAX9867_FREQ_MASK, freq); 407 } else { 408 /* 409 * digital pll locks on to any externally supplied LRCLK signal 410 * and also enable rapid lock mode. 411 */ 412 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKLOW, 413 MAX9867_RAPID_LOCK, MAX9867_RAPID_LOCK); 414 regmap_update_bits(max9867->regmap, MAX9867_AUDIOCLKHIGH, 415 MAX9867_PLL, MAX9867_PLL); 416 } 417 return 0; 418} 419 420static int max9867_mute(struct snd_soc_dai *dai, int mute, int direction) 421{ 422 struct snd_soc_component *component = dai->component; 423 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 424 425 return regmap_update_bits(max9867->regmap, MAX9867_DACLEVEL, 426 1 << 6, !!mute << 6); 427} 428 429static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai, 430 int clk_id, unsigned int freq, int dir) 431{ 432 struct snd_soc_component *component = codec_dai->component; 433 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 434 int value = 0; 435 436 /* Set the prescaler based on the master clock frequency*/ 437 if (freq >= 10000000 && freq <= 20000000) { 438 value |= MAX9867_PSCLK_10_20; 439 max9867->pclk = freq; 440 } else if (freq >= 20000000 && freq <= 40000000) { 441 value |= MAX9867_PSCLK_20_40; 442 max9867->pclk = freq / 2; 443 } else if (freq >= 40000000 && freq <= 60000000) { 444 value |= MAX9867_PSCLK_40_60; 445 max9867->pclk = freq / 4; 446 } else { 447 dev_err(component->dev, 448 "Invalid clock frequency %uHz (required 10-60MHz)\n", 449 freq); 450 return -EINVAL; 451 } 452 if (freq % 48000 == 0) 453 max9867->constraints = &max9867_constraints_48k; 454 else if (freq % 44100 == 0) 455 max9867->constraints = &max9867_constraints_44k1; 456 else 457 dev_warn(component->dev, 458 "Unable to set exact rate with %uHz clock frequency\n", 459 freq); 460 max9867->sysclk = freq; 461 value = value << MAX9867_PSCLK_SHIFT; 462 regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, 463 MAX9867_PSCLK_MASK, value); 464 return 0; 465} 466 467static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai, 468 unsigned int fmt) 469{ 470 struct snd_soc_component *component = codec_dai->component; 471 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 472 u8 iface1A, iface1B; 473 474 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 475 case SND_SOC_DAIFMT_CBP_CFP: 476 max9867->provider = true; 477 iface1A = MAX9867_MASTER; 478 iface1B = MAX9867_IFC1B_48X; 479 break; 480 case SND_SOC_DAIFMT_CBC_CFC: 481 max9867->provider = false; 482 iface1A = iface1B = 0; 483 break; 484 default: 485 return -EINVAL; 486 } 487 488 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 489 case SND_SOC_DAIFMT_I2S: 490 max9867->dsp_a = false; 491 iface1A |= MAX9867_I2S_DLY; 492 break; 493 case SND_SOC_DAIFMT_DSP_A: 494 max9867->dsp_a = true; 495 iface1A |= MAX9867_TDM_MODE | MAX9867_SDOUT_HIZ; 496 break; 497 default: 498 return -EINVAL; 499 } 500 501 /* Clock inversion bits, BCI and WCI */ 502 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 503 case SND_SOC_DAIFMT_NB_NF: 504 break; 505 case SND_SOC_DAIFMT_IB_IF: 506 iface1A |= MAX9867_WCI_MODE | MAX9867_BCI_MODE; 507 break; 508 case SND_SOC_DAIFMT_IB_NF: 509 iface1A |= MAX9867_BCI_MODE; 510 break; 511 case SND_SOC_DAIFMT_NB_IF: 512 iface1A |= MAX9867_WCI_MODE; 513 break; 514 default: 515 return -EINVAL; 516 } 517 518 regmap_write(max9867->regmap, MAX9867_IFC1A, iface1A); 519 regmap_update_bits(max9867->regmap, MAX9867_IFC1B, 520 MAX9867_IFC1B_BCLK_MASK, iface1B); 521 522 return 0; 523} 524 525static const struct snd_soc_dai_ops max9867_dai_ops = { 526 .set_sysclk = max9867_set_dai_sysclk, 527 .set_fmt = max9867_dai_set_fmt, 528 .mute_stream = max9867_mute, 529 .startup = max9867_startup, 530 .hw_params = max9867_dai_hw_params, 531 .no_capture_mute = 1, 532}; 533 534static struct snd_soc_dai_driver max9867_dai[] = { 535 { 536 .name = "max9867-aif1", 537 .playback = { 538 .stream_name = "HiFi Playback", 539 .channels_min = 2, 540 .channels_max = 2, 541 .rates = SNDRV_PCM_RATE_8000_48000, 542 .formats = SNDRV_PCM_FMTBIT_S16_LE, 543 }, 544 .capture = { 545 .stream_name = "HiFi Capture", 546 .channels_min = 2, 547 .channels_max = 2, 548 .rates = SNDRV_PCM_RATE_8000_48000, 549 .formats = SNDRV_PCM_FMTBIT_S16_LE, 550 }, 551 .ops = &max9867_dai_ops, 552 .symmetric_rate = 1, 553 } 554}; 555 556#ifdef CONFIG_PM 557static int max9867_suspend(struct snd_soc_component *component) 558{ 559 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF); 560 561 return 0; 562} 563 564static int max9867_resume(struct snd_soc_component *component) 565{ 566 snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY); 567 568 return 0; 569} 570#else 571#define max9867_suspend NULL 572#define max9867_resume NULL 573#endif 574 575static int max9867_set_bias_level(struct snd_soc_component *component, 576 enum snd_soc_bias_level level) 577{ 578 int err; 579 struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); 580 581 switch (level) { 582 case SND_SOC_BIAS_ON: 583 err = clk_prepare_enable(max9867->mclk); 584 if (err) 585 return err; 586 break; 587 case SND_SOC_BIAS_STANDBY: 588 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { 589 err = regcache_sync(max9867->regmap); 590 if (err) 591 return err; 592 593 err = regmap_write(max9867->regmap, 594 MAX9867_PWRMAN, 0xff); 595 if (err) 596 return err; 597 } 598 break; 599 case SND_SOC_BIAS_OFF: 600 err = regmap_write(max9867->regmap, MAX9867_PWRMAN, 0); 601 if (err) 602 return err; 603 604 regcache_mark_dirty(max9867->regmap); 605 clk_disable_unprepare(max9867->mclk); 606 break; 607 default: 608 break; 609 } 610 611 return 0; 612} 613 614static const struct snd_soc_component_driver max9867_component = { 615 .controls = max9867_snd_controls, 616 .num_controls = ARRAY_SIZE(max9867_snd_controls), 617 .dapm_routes = max9867_audio_map, 618 .num_dapm_routes = ARRAY_SIZE(max9867_audio_map), 619 .dapm_widgets = max9867_dapm_widgets, 620 .num_dapm_widgets = ARRAY_SIZE(max9867_dapm_widgets), 621 .suspend = max9867_suspend, 622 .resume = max9867_resume, 623 .set_bias_level = max9867_set_bias_level, 624 .idle_bias_on = 1, 625 .use_pmdown_time = 1, 626 .endianness = 1, 627}; 628 629static bool max9867_volatile_register(struct device *dev, unsigned int reg) 630{ 631 switch (reg) { 632 case MAX9867_STATUS: 633 case MAX9867_JACKSTATUS: 634 case MAX9867_AUXHIGH: 635 case MAX9867_AUXLOW: 636 return true; 637 default: 638 return false; 639 } 640} 641 642static const struct regmap_config max9867_regmap = { 643 .reg_bits = 8, 644 .val_bits = 8, 645 .max_register = MAX9867_REVISION, 646 .volatile_reg = max9867_volatile_register, 647 .cache_type = REGCACHE_RBTREE, 648}; 649 650static int max9867_i2c_probe(struct i2c_client *i2c) 651{ 652 struct max9867_priv *max9867; 653 int ret, reg; 654 655 max9867 = devm_kzalloc(&i2c->dev, sizeof(*max9867), GFP_KERNEL); 656 if (!max9867) 657 return -ENOMEM; 658 659 i2c_set_clientdata(i2c, max9867); 660 max9867->regmap = devm_regmap_init_i2c(i2c, &max9867_regmap); 661 if (IS_ERR(max9867->regmap)) { 662 ret = PTR_ERR(max9867->regmap); 663 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret); 664 return ret; 665 } 666 ret = regmap_read(max9867->regmap, MAX9867_REVISION, ®); 667 if (ret < 0) { 668 dev_err(&i2c->dev, "Failed to read: %d\n", ret); 669 return ret; 670 } 671 dev_info(&i2c->dev, "device revision: %x\n", reg); 672 ret = devm_snd_soc_register_component(&i2c->dev, &max9867_component, 673 max9867_dai, ARRAY_SIZE(max9867_dai)); 674 if (ret < 0) { 675 dev_err(&i2c->dev, "Failed to register component: %d\n", ret); 676 return ret; 677 } 678 679 max9867->mclk = devm_clk_get(&i2c->dev, NULL); 680 if (IS_ERR(max9867->mclk)) 681 return PTR_ERR(max9867->mclk); 682 683 return 0; 684} 685 686static const struct i2c_device_id max9867_i2c_id[] = { 687 { "max9867", 0 }, 688 { } 689}; 690MODULE_DEVICE_TABLE(i2c, max9867_i2c_id); 691 692#ifdef CONFIG_OF 693static const struct of_device_id max9867_of_match[] = { 694 { .compatible = "maxim,max9867", }, 695 { } 696}; 697MODULE_DEVICE_TABLE(of, max9867_of_match); 698#endif 699 700static struct i2c_driver max9867_i2c_driver = { 701 .driver = { 702 .name = "max9867", 703 .of_match_table = of_match_ptr(max9867_of_match), 704 }, 705 .probe = max9867_i2c_probe, 706 .id_table = max9867_i2c_id, 707}; 708 709module_i2c_driver(max9867_i2c_driver); 710 711MODULE_AUTHOR("Ladislav Michl <ladis@linux-mips.org>"); 712MODULE_DESCRIPTION("ASoC MAX9867 driver"); 713MODULE_LICENSE("GPL"); 714