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