1 /* 2 * CS4271 ASoC codec driver 3 * 4 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * This driver support CS4271 codec being master or slave, working 17 * in control port mode, connected either via SPI or I2C. 18 * The data format accepted is I2S or left-justified. 19 * DAPM support not implemented. 20 */ 21 22 #include <linux/module.h> 23 #include <linux/slab.h> 24 #include <linux/delay.h> 25 #include <linux/gpio.h> 26 #include <linux/of.h> 27 #include <linux/of_device.h> 28 #include <linux/of_gpio.h> 29 #include <linux/regulator/consumer.h> 30 #include <sound/pcm.h> 31 #include <sound/soc.h> 32 #include <sound/tlv.h> 33 #include <sound/cs4271.h> 34 #include "cs4271.h" 35 36 #define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ 37 SNDRV_PCM_FMTBIT_S24_LE | \ 38 SNDRV_PCM_FMTBIT_S32_LE) 39 #define CS4271_PCM_RATES SNDRV_PCM_RATE_8000_192000 40 41 /* 42 * CS4271 registers 43 */ 44 #define CS4271_MODE1 0x01 /* Mode Control 1 */ 45 #define CS4271_DACCTL 0x02 /* DAC Control */ 46 #define CS4271_DACVOL 0x03 /* DAC Volume & Mixing Control */ 47 #define CS4271_VOLA 0x04 /* DAC Channel A Volume Control */ 48 #define CS4271_VOLB 0x05 /* DAC Channel B Volume Control */ 49 #define CS4271_ADCCTL 0x06 /* ADC Control */ 50 #define CS4271_MODE2 0x07 /* Mode Control 2 */ 51 #define CS4271_CHIPID 0x08 /* Chip ID */ 52 53 #define CS4271_FIRSTREG CS4271_MODE1 54 #define CS4271_LASTREG CS4271_MODE2 55 #define CS4271_NR_REGS ((CS4271_LASTREG & 0xFF) + 1) 56 57 /* Bit masks for the CS4271 registers */ 58 #define CS4271_MODE1_MODE_MASK 0xC0 59 #define CS4271_MODE1_MODE_1X 0x00 60 #define CS4271_MODE1_MODE_2X 0x80 61 #define CS4271_MODE1_MODE_4X 0xC0 62 63 #define CS4271_MODE1_DIV_MASK 0x30 64 #define CS4271_MODE1_DIV_1 0x00 65 #define CS4271_MODE1_DIV_15 0x10 66 #define CS4271_MODE1_DIV_2 0x20 67 #define CS4271_MODE1_DIV_3 0x30 68 69 #define CS4271_MODE1_MASTER 0x08 70 71 #define CS4271_MODE1_DAC_DIF_MASK 0x07 72 #define CS4271_MODE1_DAC_DIF_LJ 0x00 73 #define CS4271_MODE1_DAC_DIF_I2S 0x01 74 #define CS4271_MODE1_DAC_DIF_RJ16 0x02 75 #define CS4271_MODE1_DAC_DIF_RJ24 0x03 76 #define CS4271_MODE1_DAC_DIF_RJ20 0x04 77 #define CS4271_MODE1_DAC_DIF_RJ18 0x05 78 79 #define CS4271_DACCTL_AMUTE 0x80 80 #define CS4271_DACCTL_IF_SLOW 0x40 81 82 #define CS4271_DACCTL_DEM_MASK 0x30 83 #define CS4271_DACCTL_DEM_DIS 0x00 84 #define CS4271_DACCTL_DEM_441 0x10 85 #define CS4271_DACCTL_DEM_48 0x20 86 #define CS4271_DACCTL_DEM_32 0x30 87 88 #define CS4271_DACCTL_SVRU 0x08 89 #define CS4271_DACCTL_SRD 0x04 90 #define CS4271_DACCTL_INVA 0x02 91 #define CS4271_DACCTL_INVB 0x01 92 93 #define CS4271_DACVOL_BEQUA 0x40 94 #define CS4271_DACVOL_SOFT 0x20 95 #define CS4271_DACVOL_ZEROC 0x10 96 97 #define CS4271_DACVOL_ATAPI_MASK 0x0F 98 #define CS4271_DACVOL_ATAPI_M_M 0x00 99 #define CS4271_DACVOL_ATAPI_M_BR 0x01 100 #define CS4271_DACVOL_ATAPI_M_BL 0x02 101 #define CS4271_DACVOL_ATAPI_M_BLR2 0x03 102 #define CS4271_DACVOL_ATAPI_AR_M 0x04 103 #define CS4271_DACVOL_ATAPI_AR_BR 0x05 104 #define CS4271_DACVOL_ATAPI_AR_BL 0x06 105 #define CS4271_DACVOL_ATAPI_AR_BLR2 0x07 106 #define CS4271_DACVOL_ATAPI_AL_M 0x08 107 #define CS4271_DACVOL_ATAPI_AL_BR 0x09 108 #define CS4271_DACVOL_ATAPI_AL_BL 0x0A 109 #define CS4271_DACVOL_ATAPI_AL_BLR2 0x0B 110 #define CS4271_DACVOL_ATAPI_ALR2_M 0x0C 111 #define CS4271_DACVOL_ATAPI_ALR2_BR 0x0D 112 #define CS4271_DACVOL_ATAPI_ALR2_BL 0x0E 113 #define CS4271_DACVOL_ATAPI_ALR2_BLR2 0x0F 114 115 #define CS4271_VOLA_MUTE 0x80 116 #define CS4271_VOLA_VOL_MASK 0x7F 117 #define CS4271_VOLB_MUTE 0x80 118 #define CS4271_VOLB_VOL_MASK 0x7F 119 120 #define CS4271_ADCCTL_DITHER16 0x20 121 122 #define CS4271_ADCCTL_ADC_DIF_MASK 0x10 123 #define CS4271_ADCCTL_ADC_DIF_LJ 0x00 124 #define CS4271_ADCCTL_ADC_DIF_I2S 0x10 125 126 #define CS4271_ADCCTL_MUTEA 0x08 127 #define CS4271_ADCCTL_MUTEB 0x04 128 #define CS4271_ADCCTL_HPFDA 0x02 129 #define CS4271_ADCCTL_HPFDB 0x01 130 131 #define CS4271_MODE2_LOOP 0x10 132 #define CS4271_MODE2_MUTECAEQUB 0x08 133 #define CS4271_MODE2_FREEZE 0x04 134 #define CS4271_MODE2_CPEN 0x02 135 #define CS4271_MODE2_PDN 0x01 136 137 #define CS4271_CHIPID_PART_MASK 0xF0 138 #define CS4271_CHIPID_REV_MASK 0x0F 139 140 /* 141 * Default CS4271 power-up configuration 142 * Array contains non-existing in hw register at address 0 143 * Array do not include Chip ID, as codec driver does not use 144 * registers read operations at all 145 */ 146 static const struct reg_default cs4271_reg_defaults[] = { 147 { CS4271_MODE1, 0, }, 148 { CS4271_DACCTL, CS4271_DACCTL_AMUTE, }, 149 { CS4271_DACVOL, CS4271_DACVOL_SOFT | CS4271_DACVOL_ATAPI_AL_BR, }, 150 { CS4271_VOLA, 0, }, 151 { CS4271_VOLB, 0, }, 152 { CS4271_ADCCTL, 0, }, 153 { CS4271_MODE2, 0, }, 154 }; 155 156 static bool cs4271_volatile_reg(struct device *dev, unsigned int reg) 157 { 158 return reg == CS4271_CHIPID; 159 } 160 161 static const char * const supply_names[] = { 162 "vd", "vl", "va" 163 }; 164 165 struct cs4271_private { 166 unsigned int mclk; 167 bool master; 168 bool deemph; 169 struct regmap *regmap; 170 /* Current sample rate for de-emphasis control */ 171 int rate; 172 /* GPIO driving Reset pin, if any */ 173 int gpio_nreset; 174 /* GPIO that disable serial bus, if any */ 175 int gpio_disable; 176 /* enable soft reset workaround */ 177 bool enable_soft_reset; 178 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; 179 }; 180 181 static const struct snd_soc_dapm_widget cs4271_dapm_widgets[] = { 182 SND_SOC_DAPM_INPUT("AINA"), 183 SND_SOC_DAPM_INPUT("AINB"), 184 185 SND_SOC_DAPM_OUTPUT("AOUTA+"), 186 SND_SOC_DAPM_OUTPUT("AOUTA-"), 187 SND_SOC_DAPM_OUTPUT("AOUTB+"), 188 SND_SOC_DAPM_OUTPUT("AOUTB-"), 189 }; 190 191 static const struct snd_soc_dapm_route cs4271_dapm_routes[] = { 192 { "Capture", NULL, "AINA" }, 193 { "Capture", NULL, "AINB" }, 194 195 { "AOUTA+", NULL, "Playback" }, 196 { "AOUTA-", NULL, "Playback" }, 197 { "AOUTB+", NULL, "Playback" }, 198 { "AOUTB-", NULL, "Playback" }, 199 }; 200 201 /* 202 * @freq is the desired MCLK rate 203 * MCLK rate should (c) be the sample rate, multiplied by one of the 204 * ratios listed in cs4271_mclk_fs_ratios table 205 */ 206 static int cs4271_set_dai_sysclk(struct snd_soc_dai *codec_dai, 207 int clk_id, unsigned int freq, int dir) 208 { 209 struct snd_soc_codec *codec = codec_dai->codec; 210 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 211 212 cs4271->mclk = freq; 213 return 0; 214 } 215 216 static int cs4271_set_dai_fmt(struct snd_soc_dai *codec_dai, 217 unsigned int format) 218 { 219 struct snd_soc_codec *codec = codec_dai->codec; 220 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 221 unsigned int val = 0; 222 int ret; 223 224 switch (format & SND_SOC_DAIFMT_MASTER_MASK) { 225 case SND_SOC_DAIFMT_CBS_CFS: 226 cs4271->master = 0; 227 break; 228 case SND_SOC_DAIFMT_CBM_CFM: 229 cs4271->master = 1; 230 val |= CS4271_MODE1_MASTER; 231 break; 232 default: 233 dev_err(codec->dev, "Invalid DAI format\n"); 234 return -EINVAL; 235 } 236 237 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) { 238 case SND_SOC_DAIFMT_LEFT_J: 239 val |= CS4271_MODE1_DAC_DIF_LJ; 240 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL, 241 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_LJ); 242 if (ret < 0) 243 return ret; 244 break; 245 case SND_SOC_DAIFMT_I2S: 246 val |= CS4271_MODE1_DAC_DIF_I2S; 247 ret = regmap_update_bits(cs4271->regmap, CS4271_ADCCTL, 248 CS4271_ADCCTL_ADC_DIF_MASK, CS4271_ADCCTL_ADC_DIF_I2S); 249 if (ret < 0) 250 return ret; 251 break; 252 default: 253 dev_err(codec->dev, "Invalid DAI format\n"); 254 return -EINVAL; 255 } 256 257 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1, 258 CS4271_MODE1_DAC_DIF_MASK | CS4271_MODE1_MASTER, val); 259 if (ret < 0) 260 return ret; 261 return 0; 262 } 263 264 static int cs4271_deemph[] = {0, 44100, 48000, 32000}; 265 266 static int cs4271_set_deemph(struct snd_soc_codec *codec) 267 { 268 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 269 int i, ret; 270 int val = CS4271_DACCTL_DEM_DIS; 271 272 if (cs4271->deemph) { 273 /* Find closest de-emphasis freq */ 274 val = 1; 275 for (i = 2; i < ARRAY_SIZE(cs4271_deemph); i++) 276 if (abs(cs4271_deemph[i] - cs4271->rate) < 277 abs(cs4271_deemph[val] - cs4271->rate)) 278 val = i; 279 val <<= 4; 280 } 281 282 ret = regmap_update_bits(cs4271->regmap, CS4271_DACCTL, 283 CS4271_DACCTL_DEM_MASK, val); 284 if (ret < 0) 285 return ret; 286 return 0; 287 } 288 289 static int cs4271_get_deemph(struct snd_kcontrol *kcontrol, 290 struct snd_ctl_elem_value *ucontrol) 291 { 292 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 293 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 294 295 ucontrol->value.integer.value[0] = cs4271->deemph; 296 return 0; 297 } 298 299 static int cs4271_put_deemph(struct snd_kcontrol *kcontrol, 300 struct snd_ctl_elem_value *ucontrol) 301 { 302 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 303 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 304 305 cs4271->deemph = ucontrol->value.integer.value[0]; 306 return cs4271_set_deemph(codec); 307 } 308 309 struct cs4271_clk_cfg { 310 bool master; /* codec mode */ 311 u8 speed_mode; /* codec speed mode: 1x, 2x, 4x */ 312 unsigned short ratio; /* MCLK / sample rate */ 313 u8 ratio_mask; /* ratio bit mask for Master mode */ 314 }; 315 316 static struct cs4271_clk_cfg cs4271_clk_tab[] = { 317 {1, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1}, 318 {1, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_15}, 319 {1, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_2}, 320 {1, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_3}, 321 {1, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1}, 322 {1, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_15}, 323 {1, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_2}, 324 {1, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_3}, 325 {1, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1}, 326 {1, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_15}, 327 {1, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_2}, 328 {1, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_3}, 329 {0, CS4271_MODE1_MODE_1X, 256, CS4271_MODE1_DIV_1}, 330 {0, CS4271_MODE1_MODE_1X, 384, CS4271_MODE1_DIV_1}, 331 {0, CS4271_MODE1_MODE_1X, 512, CS4271_MODE1_DIV_1}, 332 {0, CS4271_MODE1_MODE_1X, 768, CS4271_MODE1_DIV_2}, 333 {0, CS4271_MODE1_MODE_1X, 1024, CS4271_MODE1_DIV_2}, 334 {0, CS4271_MODE1_MODE_2X, 128, CS4271_MODE1_DIV_1}, 335 {0, CS4271_MODE1_MODE_2X, 192, CS4271_MODE1_DIV_1}, 336 {0, CS4271_MODE1_MODE_2X, 256, CS4271_MODE1_DIV_1}, 337 {0, CS4271_MODE1_MODE_2X, 384, CS4271_MODE1_DIV_2}, 338 {0, CS4271_MODE1_MODE_2X, 512, CS4271_MODE1_DIV_2}, 339 {0, CS4271_MODE1_MODE_4X, 64, CS4271_MODE1_DIV_1}, 340 {0, CS4271_MODE1_MODE_4X, 96, CS4271_MODE1_DIV_1}, 341 {0, CS4271_MODE1_MODE_4X, 128, CS4271_MODE1_DIV_1}, 342 {0, CS4271_MODE1_MODE_4X, 192, CS4271_MODE1_DIV_2}, 343 {0, CS4271_MODE1_MODE_4X, 256, CS4271_MODE1_DIV_2}, 344 }; 345 346 #define CS4171_NR_RATIOS ARRAY_SIZE(cs4271_clk_tab) 347 348 static int cs4271_hw_params(struct snd_pcm_substream *substream, 349 struct snd_pcm_hw_params *params, 350 struct snd_soc_dai *dai) 351 { 352 struct snd_soc_codec *codec = dai->codec; 353 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 354 int i, ret; 355 unsigned int ratio, val; 356 357 if (cs4271->enable_soft_reset) { 358 /* 359 * Put the codec in soft reset and back again in case it's not 360 * currently streaming data. This way of bringing the codec in 361 * sync to the current clocks is not explicitly documented in 362 * the data sheet, but it seems to work fine, and in contrast 363 * to a read hardware reset, we don't have to sync back all 364 * registers every time. 365 */ 366 367 if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 368 !dai->capture_active) || 369 (substream->stream == SNDRV_PCM_STREAM_CAPTURE && 370 !dai->playback_active)) { 371 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 372 CS4271_MODE2_PDN, 373 CS4271_MODE2_PDN); 374 if (ret < 0) 375 return ret; 376 377 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 378 CS4271_MODE2_PDN, 0); 379 if (ret < 0) 380 return ret; 381 } 382 } 383 384 cs4271->rate = params_rate(params); 385 386 /* Configure DAC */ 387 if (cs4271->rate < 50000) 388 val = CS4271_MODE1_MODE_1X; 389 else if (cs4271->rate < 100000) 390 val = CS4271_MODE1_MODE_2X; 391 else 392 val = CS4271_MODE1_MODE_4X; 393 394 ratio = cs4271->mclk / cs4271->rate; 395 for (i = 0; i < CS4171_NR_RATIOS; i++) 396 if ((cs4271_clk_tab[i].master == cs4271->master) && 397 (cs4271_clk_tab[i].speed_mode == val) && 398 (cs4271_clk_tab[i].ratio == ratio)) 399 break; 400 401 if (i == CS4171_NR_RATIOS) { 402 dev_err(codec->dev, "Invalid sample rate\n"); 403 return -EINVAL; 404 } 405 406 val |= cs4271_clk_tab[i].ratio_mask; 407 408 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE1, 409 CS4271_MODE1_MODE_MASK | CS4271_MODE1_DIV_MASK, val); 410 if (ret < 0) 411 return ret; 412 413 return cs4271_set_deemph(codec); 414 } 415 416 static int cs4271_mute_stream(struct snd_soc_dai *dai, int mute, int stream) 417 { 418 struct snd_soc_codec *codec = dai->codec; 419 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 420 int ret; 421 int val_a = 0; 422 int val_b = 0; 423 424 if (stream != SNDRV_PCM_STREAM_PLAYBACK) 425 return 0; 426 427 if (mute) { 428 val_a = CS4271_VOLA_MUTE; 429 val_b = CS4271_VOLB_MUTE; 430 } 431 432 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLA, 433 CS4271_VOLA_MUTE, val_a); 434 if (ret < 0) 435 return ret; 436 437 ret = regmap_update_bits(cs4271->regmap, CS4271_VOLB, 438 CS4271_VOLB_MUTE, val_b); 439 if (ret < 0) 440 return ret; 441 442 return 0; 443 } 444 445 /* CS4271 controls */ 446 static DECLARE_TLV_DB_SCALE(cs4271_dac_tlv, -12700, 100, 0); 447 448 static const struct snd_kcontrol_new cs4271_snd_controls[] = { 449 SOC_DOUBLE_R_TLV("Master Playback Volume", CS4271_VOLA, CS4271_VOLB, 450 0, 0x7F, 1, cs4271_dac_tlv), 451 SOC_SINGLE("Digital Loopback Switch", CS4271_MODE2, 4, 1, 0), 452 SOC_SINGLE("Soft Ramp Switch", CS4271_DACVOL, 5, 1, 0), 453 SOC_SINGLE("Zero Cross Switch", CS4271_DACVOL, 4, 1, 0), 454 SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0, 455 cs4271_get_deemph, cs4271_put_deemph), 456 SOC_SINGLE("Auto-Mute Switch", CS4271_DACCTL, 7, 1, 0), 457 SOC_SINGLE("Slow Roll Off Filter Switch", CS4271_DACCTL, 6, 1, 0), 458 SOC_SINGLE("Soft Volume Ramp-Up Switch", CS4271_DACCTL, 3, 1, 0), 459 SOC_SINGLE("Soft Ramp-Down Switch", CS4271_DACCTL, 2, 1, 0), 460 SOC_SINGLE("Left Channel Inversion Switch", CS4271_DACCTL, 1, 1, 0), 461 SOC_SINGLE("Right Channel Inversion Switch", CS4271_DACCTL, 0, 1, 0), 462 SOC_DOUBLE("Master Capture Switch", CS4271_ADCCTL, 3, 2, 1, 1), 463 SOC_SINGLE("Dither 16-Bit Data Switch", CS4271_ADCCTL, 5, 1, 0), 464 SOC_DOUBLE("High Pass Filter Switch", CS4271_ADCCTL, 1, 0, 1, 1), 465 SOC_DOUBLE_R("Master Playback Switch", CS4271_VOLA, CS4271_VOLB, 466 7, 1, 1), 467 }; 468 469 static const struct snd_soc_dai_ops cs4271_dai_ops = { 470 .hw_params = cs4271_hw_params, 471 .set_sysclk = cs4271_set_dai_sysclk, 472 .set_fmt = cs4271_set_dai_fmt, 473 .mute_stream = cs4271_mute_stream, 474 }; 475 476 static struct snd_soc_dai_driver cs4271_dai = { 477 .name = "cs4271-hifi", 478 .playback = { 479 .stream_name = "Playback", 480 .channels_min = 2, 481 .channels_max = 2, 482 .rates = CS4271_PCM_RATES, 483 .formats = CS4271_PCM_FORMATS, 484 }, 485 .capture = { 486 .stream_name = "Capture", 487 .channels_min = 2, 488 .channels_max = 2, 489 .rates = CS4271_PCM_RATES, 490 .formats = CS4271_PCM_FORMATS, 491 }, 492 .ops = &cs4271_dai_ops, 493 .symmetric_rates = 1, 494 }; 495 496 static int cs4271_reset(struct snd_soc_codec *codec) 497 { 498 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 499 500 if (gpio_is_valid(cs4271->gpio_nreset)) { 501 gpio_set_value(cs4271->gpio_nreset, 0); 502 mdelay(1); 503 gpio_set_value(cs4271->gpio_nreset, 1); 504 mdelay(1); 505 } 506 507 return 0; 508 } 509 510 #ifdef CONFIG_PM 511 static int cs4271_soc_suspend(struct snd_soc_codec *codec) 512 { 513 int ret; 514 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 515 516 /* Set power-down bit */ 517 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 518 CS4271_MODE2_PDN, CS4271_MODE2_PDN); 519 if (ret < 0) 520 return ret; 521 522 regcache_mark_dirty(cs4271->regmap); 523 regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies); 524 525 return 0; 526 } 527 528 static int cs4271_soc_resume(struct snd_soc_codec *codec) 529 { 530 int ret; 531 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 532 533 ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies), 534 cs4271->supplies); 535 if (ret < 0) { 536 dev_err(codec->dev, "Failed to enable regulators: %d\n", ret); 537 return ret; 538 } 539 540 /* Do a proper reset after power up */ 541 cs4271_reset(codec); 542 543 /* Restore codec state */ 544 ret = regcache_sync(cs4271->regmap); 545 if (ret < 0) 546 return ret; 547 548 /* then disable the power-down bit */ 549 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 550 CS4271_MODE2_PDN, 0); 551 if (ret < 0) 552 return ret; 553 554 return 0; 555 } 556 #else 557 #define cs4271_soc_suspend NULL 558 #define cs4271_soc_resume NULL 559 #endif /* CONFIG_PM */ 560 561 #ifdef CONFIG_OF 562 const struct of_device_id cs4271_dt_ids[] = { 563 { .compatible = "cirrus,cs4271", }, 564 { } 565 }; 566 MODULE_DEVICE_TABLE(of, cs4271_dt_ids); 567 EXPORT_SYMBOL_GPL(cs4271_dt_ids); 568 #endif 569 570 static int cs4271_codec_probe(struct snd_soc_codec *codec) 571 { 572 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 573 struct cs4271_platform_data *cs4271plat = codec->dev->platform_data; 574 int ret; 575 bool amutec_eq_bmutec = false; 576 577 #ifdef CONFIG_OF 578 if (of_match_device(cs4271_dt_ids, codec->dev)) { 579 if (of_get_property(codec->dev->of_node, 580 "cirrus,amutec-eq-bmutec", NULL)) 581 amutec_eq_bmutec = true; 582 583 if (of_get_property(codec->dev->of_node, 584 "cirrus,enable-soft-reset", NULL)) 585 cs4271->enable_soft_reset = true; 586 } 587 #endif 588 589 ret = regulator_bulk_enable(ARRAY_SIZE(cs4271->supplies), 590 cs4271->supplies); 591 if (ret < 0) { 592 dev_err(codec->dev, "Failed to enable regulators: %d\n", ret); 593 return ret; 594 } 595 596 if (cs4271plat) { 597 amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec; 598 cs4271->enable_soft_reset = cs4271plat->enable_soft_reset; 599 } 600 601 /* Reset codec */ 602 cs4271_reset(codec); 603 604 ret = regcache_sync(cs4271->regmap); 605 if (ret < 0) 606 return ret; 607 608 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 609 CS4271_MODE2_PDN | CS4271_MODE2_CPEN, 610 CS4271_MODE2_PDN | CS4271_MODE2_CPEN); 611 if (ret < 0) 612 return ret; 613 ret = regmap_update_bits(cs4271->regmap, CS4271_MODE2, 614 CS4271_MODE2_PDN, 0); 615 if (ret < 0) 616 return ret; 617 /* Power-up sequence requires 85 uS */ 618 udelay(85); 619 620 if (amutec_eq_bmutec) 621 regmap_update_bits(cs4271->regmap, CS4271_MODE2, 622 CS4271_MODE2_MUTECAEQUB, 623 CS4271_MODE2_MUTECAEQUB); 624 625 return 0; 626 } 627 628 static int cs4271_codec_remove(struct snd_soc_codec *codec) 629 { 630 struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec); 631 632 if (gpio_is_valid(cs4271->gpio_nreset)) 633 /* Set codec to the reset state */ 634 gpio_set_value(cs4271->gpio_nreset, 0); 635 636 regcache_mark_dirty(cs4271->regmap); 637 regulator_bulk_disable(ARRAY_SIZE(cs4271->supplies), cs4271->supplies); 638 639 return 0; 640 }; 641 642 static struct snd_soc_codec_driver soc_codec_dev_cs4271 = { 643 .probe = cs4271_codec_probe, 644 .remove = cs4271_codec_remove, 645 .suspend = cs4271_soc_suspend, 646 .resume = cs4271_soc_resume, 647 648 .component_driver = { 649 .controls = cs4271_snd_controls, 650 .num_controls = ARRAY_SIZE(cs4271_snd_controls), 651 .dapm_widgets = cs4271_dapm_widgets, 652 .num_dapm_widgets = ARRAY_SIZE(cs4271_dapm_widgets), 653 .dapm_routes = cs4271_dapm_routes, 654 .num_dapm_routes = ARRAY_SIZE(cs4271_dapm_routes), 655 }, 656 }; 657 658 static int cs4271_common_probe(struct device *dev, 659 struct cs4271_private **c) 660 { 661 struct cs4271_platform_data *cs4271plat = dev->platform_data; 662 struct cs4271_private *cs4271; 663 int i, ret; 664 665 cs4271 = devm_kzalloc(dev, sizeof(*cs4271), GFP_KERNEL); 666 if (!cs4271) 667 return -ENOMEM; 668 669 if (of_match_device(cs4271_dt_ids, dev)) 670 cs4271->gpio_nreset = 671 of_get_named_gpio(dev->of_node, "reset-gpio", 0); 672 673 if (cs4271plat) 674 cs4271->gpio_nreset = cs4271plat->gpio_nreset; 675 676 if (gpio_is_valid(cs4271->gpio_nreset)) { 677 int ret; 678 679 ret = devm_gpio_request(dev, cs4271->gpio_nreset, 680 "CS4271 Reset"); 681 if (ret < 0) 682 return ret; 683 } 684 685 for (i = 0; i < ARRAY_SIZE(supply_names); i++) 686 cs4271->supplies[i].supply = supply_names[i]; 687 688 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs4271->supplies), 689 cs4271->supplies); 690 691 if (ret < 0) { 692 dev_err(dev, "Failed to get regulators: %d\n", ret); 693 return ret; 694 } 695 696 *c = cs4271; 697 return 0; 698 } 699 700 const struct regmap_config cs4271_regmap_config = { 701 .max_register = CS4271_LASTREG, 702 703 .reg_defaults = cs4271_reg_defaults, 704 .num_reg_defaults = ARRAY_SIZE(cs4271_reg_defaults), 705 .cache_type = REGCACHE_RBTREE, 706 707 .volatile_reg = cs4271_volatile_reg, 708 }; 709 EXPORT_SYMBOL_GPL(cs4271_regmap_config); 710 711 int cs4271_probe(struct device *dev, struct regmap *regmap) 712 { 713 struct cs4271_private *cs4271; 714 int ret; 715 716 if (IS_ERR(regmap)) 717 return PTR_ERR(regmap); 718 719 ret = cs4271_common_probe(dev, &cs4271); 720 if (ret < 0) 721 return ret; 722 723 dev_set_drvdata(dev, cs4271); 724 cs4271->regmap = regmap; 725 726 return snd_soc_register_codec(dev, &soc_codec_dev_cs4271, &cs4271_dai, 727 1); 728 } 729 EXPORT_SYMBOL_GPL(cs4271_probe); 730 731 MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>"); 732 MODULE_DESCRIPTION("Cirrus Logic CS4271 ALSA SoC Codec Driver"); 733 MODULE_LICENSE("GPL"); 734