1 /* 2 * sgtl5000.c -- SGTL5000 ALSA SoC Audio driver 3 * 4 * Copyright 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved. 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/module.h> 12 #include <linux/moduleparam.h> 13 #include <linux/init.h> 14 #include <linux/delay.h> 15 #include <linux/slab.h> 16 #include <linux/pm.h> 17 #include <linux/i2c.h> 18 #include <linux/clk.h> 19 #include <linux/log2.h> 20 #include <linux/regmap.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/regulator/consumer.h> 24 #include <linux/of_device.h> 25 #include <sound/core.h> 26 #include <sound/tlv.h> 27 #include <sound/pcm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/soc.h> 30 #include <sound/soc-dapm.h> 31 #include <sound/initval.h> 32 33 #include "sgtl5000.h" 34 35 #define SGTL5000_DAP_REG_OFFSET 0x0100 36 #define SGTL5000_MAX_REG_OFFSET 0x013A 37 38 /* default value of sgtl5000 registers */ 39 static const struct reg_default sgtl5000_reg_defaults[] = { 40 { SGTL5000_CHIP_DIG_POWER, 0x0000 }, 41 { SGTL5000_CHIP_I2S_CTRL, 0x0010 }, 42 { SGTL5000_CHIP_SSS_CTRL, 0x0010 }, 43 { SGTL5000_CHIP_ADCDAC_CTRL, 0x020c }, 44 { SGTL5000_CHIP_DAC_VOL, 0x3c3c }, 45 { SGTL5000_CHIP_PAD_STRENGTH, 0x015f }, 46 { SGTL5000_CHIP_ANA_ADC_CTRL, 0x0000 }, 47 { SGTL5000_CHIP_ANA_HP_CTRL, 0x1818 }, 48 { SGTL5000_CHIP_ANA_CTRL, 0x0111 }, 49 { SGTL5000_CHIP_REF_CTRL, 0x0000 }, 50 { SGTL5000_CHIP_MIC_CTRL, 0x0000 }, 51 { SGTL5000_CHIP_LINE_OUT_CTRL, 0x0000 }, 52 { SGTL5000_CHIP_LINE_OUT_VOL, 0x0404 }, 53 { SGTL5000_CHIP_PLL_CTRL, 0x5000 }, 54 { SGTL5000_CHIP_CLK_TOP_CTRL, 0x0000 }, 55 { SGTL5000_CHIP_ANA_STATUS, 0x0000 }, 56 { SGTL5000_CHIP_SHORT_CTRL, 0x0000 }, 57 { SGTL5000_CHIP_ANA_TEST2, 0x0000 }, 58 { SGTL5000_DAP_CTRL, 0x0000 }, 59 { SGTL5000_DAP_PEQ, 0x0000 }, 60 { SGTL5000_DAP_BASS_ENHANCE, 0x0040 }, 61 { SGTL5000_DAP_BASS_ENHANCE_CTRL, 0x051f }, 62 { SGTL5000_DAP_AUDIO_EQ, 0x0000 }, 63 { SGTL5000_DAP_SURROUND, 0x0040 }, 64 { SGTL5000_DAP_EQ_BASS_BAND0, 0x002f }, 65 { SGTL5000_DAP_EQ_BASS_BAND1, 0x002f }, 66 { SGTL5000_DAP_EQ_BASS_BAND2, 0x002f }, 67 { SGTL5000_DAP_EQ_BASS_BAND3, 0x002f }, 68 { SGTL5000_DAP_EQ_BASS_BAND4, 0x002f }, 69 { SGTL5000_DAP_MAIN_CHAN, 0x8000 }, 70 { SGTL5000_DAP_MIX_CHAN, 0x0000 }, 71 { SGTL5000_DAP_AVC_CTRL, 0x0510 }, 72 { SGTL5000_DAP_AVC_THRESHOLD, 0x1473 }, 73 { SGTL5000_DAP_AVC_ATTACK, 0x0028 }, 74 { SGTL5000_DAP_AVC_DECAY, 0x0050 }, 75 }; 76 77 /* regulator supplies for sgtl5000, VDDD is an optional external supply */ 78 enum sgtl5000_regulator_supplies { 79 VDDA, 80 VDDIO, 81 VDDD, 82 SGTL5000_SUPPLY_NUM 83 }; 84 85 /* vddd is optional supply */ 86 static const char *supply_names[SGTL5000_SUPPLY_NUM] = { 87 "VDDA", 88 "VDDIO", 89 "VDDD" 90 }; 91 92 #define LDO_VOLTAGE 1200000 93 #define LINREG_VDDD ((1600 - LDO_VOLTAGE / 1000) / 50) 94 95 enum sgtl5000_micbias_resistor { 96 SGTL5000_MICBIAS_OFF = 0, 97 SGTL5000_MICBIAS_2K = 2, 98 SGTL5000_MICBIAS_4K = 4, 99 SGTL5000_MICBIAS_8K = 8, 100 }; 101 102 enum { 103 I2S_LRCLK_STRENGTH_DISABLE, 104 I2S_LRCLK_STRENGTH_LOW, 105 I2S_LRCLK_STRENGTH_MEDIUM, 106 I2S_LRCLK_STRENGTH_HIGH, 107 }; 108 109 /* sgtl5000 private structure in codec */ 110 struct sgtl5000_priv { 111 int sysclk; /* sysclk rate */ 112 int master; /* i2s master or not */ 113 int fmt; /* i2s data format */ 114 struct regulator_bulk_data supplies[SGTL5000_SUPPLY_NUM]; 115 int num_supplies; 116 struct regmap *regmap; 117 struct clk *mclk; 118 int revision; 119 u8 micbias_resistor; 120 u8 micbias_voltage; 121 u8 lrclk_strength; 122 }; 123 124 /* 125 * mic_bias power on/off share the same register bits with 126 * output impedance of mic bias, when power on mic bias, we 127 * need reclaim it to impedance value. 128 * 0x0 = Powered off 129 * 0x1 = 2Kohm 130 * 0x2 = 4Kohm 131 * 0x3 = 8Kohm 132 */ 133 static int mic_bias_event(struct snd_soc_dapm_widget *w, 134 struct snd_kcontrol *kcontrol, int event) 135 { 136 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); 137 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 138 139 switch (event) { 140 case SND_SOC_DAPM_POST_PMU: 141 /* change mic bias resistor */ 142 snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, 143 SGTL5000_BIAS_R_MASK, 144 sgtl5000->micbias_resistor << SGTL5000_BIAS_R_SHIFT); 145 break; 146 147 case SND_SOC_DAPM_PRE_PMD: 148 snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, 149 SGTL5000_BIAS_R_MASK, 0); 150 break; 151 } 152 return 0; 153 } 154 155 /* 156 * As manual described, ADC/DAC only works when VAG powerup, 157 * So enabled VAG before ADC/DAC up. 158 * In power down case, we need wait 400ms when vag fully ramped down. 159 */ 160 static int power_vag_event(struct snd_soc_dapm_widget *w, 161 struct snd_kcontrol *kcontrol, int event) 162 { 163 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm); 164 const u32 mask = SGTL5000_DAC_POWERUP | SGTL5000_ADC_POWERUP; 165 166 switch (event) { 167 case SND_SOC_DAPM_POST_PMU: 168 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 169 SGTL5000_VAG_POWERUP, SGTL5000_VAG_POWERUP); 170 msleep(400); 171 break; 172 173 case SND_SOC_DAPM_PRE_PMD: 174 /* 175 * Don't clear VAG_POWERUP, when both DAC and ADC are 176 * operational to prevent inadvertently starving the 177 * other one of them. 178 */ 179 if ((snd_soc_read(codec, SGTL5000_CHIP_ANA_POWER) & 180 mask) != mask) { 181 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 182 SGTL5000_VAG_POWERUP, 0); 183 msleep(400); 184 } 185 break; 186 default: 187 break; 188 } 189 190 return 0; 191 } 192 193 /* input sources for ADC */ 194 static const char *adc_mux_text[] = { 195 "MIC_IN", "LINE_IN" 196 }; 197 198 static SOC_ENUM_SINGLE_DECL(adc_enum, 199 SGTL5000_CHIP_ANA_CTRL, 2, 200 adc_mux_text); 201 202 static const struct snd_kcontrol_new adc_mux = 203 SOC_DAPM_ENUM("Capture Mux", adc_enum); 204 205 /* input sources for DAC */ 206 static const char *dac_mux_text[] = { 207 "DAC", "LINE_IN" 208 }; 209 210 static SOC_ENUM_SINGLE_DECL(dac_enum, 211 SGTL5000_CHIP_ANA_CTRL, 6, 212 dac_mux_text); 213 214 static const struct snd_kcontrol_new dac_mux = 215 SOC_DAPM_ENUM("Headphone Mux", dac_enum); 216 217 static const struct snd_soc_dapm_widget sgtl5000_dapm_widgets[] = { 218 SND_SOC_DAPM_INPUT("LINE_IN"), 219 SND_SOC_DAPM_INPUT("MIC_IN"), 220 221 SND_SOC_DAPM_OUTPUT("HP_OUT"), 222 SND_SOC_DAPM_OUTPUT("LINE_OUT"), 223 224 SND_SOC_DAPM_SUPPLY("Mic Bias", SGTL5000_CHIP_MIC_CTRL, 8, 0, 225 mic_bias_event, 226 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 227 228 SND_SOC_DAPM_PGA("HP", SGTL5000_CHIP_ANA_POWER, 4, 0, NULL, 0), 229 SND_SOC_DAPM_PGA("LO", SGTL5000_CHIP_ANA_POWER, 0, 0, NULL, 0), 230 231 SND_SOC_DAPM_MUX("Capture Mux", SND_SOC_NOPM, 0, 0, &adc_mux), 232 SND_SOC_DAPM_MUX("Headphone Mux", SND_SOC_NOPM, 0, 0, &dac_mux), 233 234 /* aif for i2s input */ 235 SND_SOC_DAPM_AIF_IN("AIFIN", "Playback", 236 0, SGTL5000_CHIP_DIG_POWER, 237 0, 0), 238 239 /* aif for i2s output */ 240 SND_SOC_DAPM_AIF_OUT("AIFOUT", "Capture", 241 0, SGTL5000_CHIP_DIG_POWER, 242 1, 0), 243 244 SND_SOC_DAPM_ADC("ADC", "Capture", SGTL5000_CHIP_ANA_POWER, 1, 0), 245 SND_SOC_DAPM_DAC("DAC", "Playback", SGTL5000_CHIP_ANA_POWER, 3, 0), 246 247 SND_SOC_DAPM_PRE("VAG_POWER_PRE", power_vag_event), 248 SND_SOC_DAPM_POST("VAG_POWER_POST", power_vag_event), 249 }; 250 251 /* routes for sgtl5000 */ 252 static const struct snd_soc_dapm_route sgtl5000_dapm_routes[] = { 253 {"Capture Mux", "LINE_IN", "LINE_IN"}, /* line_in --> adc_mux */ 254 {"Capture Mux", "MIC_IN", "MIC_IN"}, /* mic_in --> adc_mux */ 255 256 {"ADC", NULL, "Capture Mux"}, /* adc_mux --> adc */ 257 {"AIFOUT", NULL, "ADC"}, /* adc --> i2s_out */ 258 259 {"DAC", NULL, "AIFIN"}, /* i2s-->dac,skip audio mux */ 260 {"Headphone Mux", "DAC", "DAC"}, /* dac --> hp_mux */ 261 {"LO", NULL, "DAC"}, /* dac --> line_out */ 262 263 {"Headphone Mux", "LINE_IN", "LINE_IN"},/* line_in --> hp_mux */ 264 {"HP", NULL, "Headphone Mux"}, /* hp_mux --> hp */ 265 266 {"LINE_OUT", NULL, "LO"}, 267 {"HP_OUT", NULL, "HP"}, 268 }; 269 270 /* custom function to fetch info of PCM playback volume */ 271 static int dac_info_volsw(struct snd_kcontrol *kcontrol, 272 struct snd_ctl_elem_info *uinfo) 273 { 274 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 275 uinfo->count = 2; 276 uinfo->value.integer.min = 0; 277 uinfo->value.integer.max = 0xfc - 0x3c; 278 return 0; 279 } 280 281 /* 282 * custom function to get of PCM playback volume 283 * 284 * dac volume register 285 * 15-------------8-7--------------0 286 * | R channel vol | L channel vol | 287 * ------------------------------- 288 * 289 * PCM volume with 0.5017 dB steps from 0 to -90 dB 290 * 291 * register values map to dB 292 * 0x3B and less = Reserved 293 * 0x3C = 0 dB 294 * 0x3D = -0.5 dB 295 * 0xF0 = -90 dB 296 * 0xFC and greater = Muted 297 * 298 * register value map to userspace value 299 * 300 * register value 0x3c(0dB) 0xf0(-90dB)0xfc 301 * ------------------------------ 302 * userspace value 0xc0 0 303 */ 304 static int dac_get_volsw(struct snd_kcontrol *kcontrol, 305 struct snd_ctl_elem_value *ucontrol) 306 { 307 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 308 int reg; 309 int l; 310 int r; 311 312 reg = snd_soc_read(codec, SGTL5000_CHIP_DAC_VOL); 313 314 /* get left channel volume */ 315 l = (reg & SGTL5000_DAC_VOL_LEFT_MASK) >> SGTL5000_DAC_VOL_LEFT_SHIFT; 316 317 /* get right channel volume */ 318 r = (reg & SGTL5000_DAC_VOL_RIGHT_MASK) >> SGTL5000_DAC_VOL_RIGHT_SHIFT; 319 320 /* make sure value fall in (0x3c,0xfc) */ 321 l = clamp(l, 0x3c, 0xfc); 322 r = clamp(r, 0x3c, 0xfc); 323 324 /* invert it and map to userspace value */ 325 l = 0xfc - l; 326 r = 0xfc - r; 327 328 ucontrol->value.integer.value[0] = l; 329 ucontrol->value.integer.value[1] = r; 330 331 return 0; 332 } 333 334 /* 335 * custom function to put of PCM playback volume 336 * 337 * dac volume register 338 * 15-------------8-7--------------0 339 * | R channel vol | L channel vol | 340 * ------------------------------- 341 * 342 * PCM volume with 0.5017 dB steps from 0 to -90 dB 343 * 344 * register values map to dB 345 * 0x3B and less = Reserved 346 * 0x3C = 0 dB 347 * 0x3D = -0.5 dB 348 * 0xF0 = -90 dB 349 * 0xFC and greater = Muted 350 * 351 * userspace value map to register value 352 * 353 * userspace value 0xc0 0 354 * ------------------------------ 355 * register value 0x3c(0dB) 0xf0(-90dB)0xfc 356 */ 357 static int dac_put_volsw(struct snd_kcontrol *kcontrol, 358 struct snd_ctl_elem_value *ucontrol) 359 { 360 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 361 int reg; 362 int l; 363 int r; 364 365 l = ucontrol->value.integer.value[0]; 366 r = ucontrol->value.integer.value[1]; 367 368 /* make sure userspace volume fall in (0, 0xfc-0x3c) */ 369 l = clamp(l, 0, 0xfc - 0x3c); 370 r = clamp(r, 0, 0xfc - 0x3c); 371 372 /* invert it, get the value can be set to register */ 373 l = 0xfc - l; 374 r = 0xfc - r; 375 376 /* shift to get the register value */ 377 reg = l << SGTL5000_DAC_VOL_LEFT_SHIFT | 378 r << SGTL5000_DAC_VOL_RIGHT_SHIFT; 379 380 snd_soc_write(codec, SGTL5000_CHIP_DAC_VOL, reg); 381 382 return 0; 383 } 384 385 static const DECLARE_TLV_DB_SCALE(capture_6db_attenuate, -600, 600, 0); 386 387 /* tlv for mic gain, 0db 20db 30db 40db */ 388 static const DECLARE_TLV_DB_RANGE(mic_gain_tlv, 389 0, 0, TLV_DB_SCALE_ITEM(0, 0, 0), 390 1, 3, TLV_DB_SCALE_ITEM(2000, 1000, 0) 391 ); 392 393 /* tlv for hp volume, -51.5db to 12.0db, step .5db */ 394 static const DECLARE_TLV_DB_SCALE(headphone_volume, -5150, 50, 0); 395 396 /* tlv for lineout volume, 31 steps of .5db each */ 397 static const DECLARE_TLV_DB_SCALE(lineout_volume, -1550, 50, 0); 398 399 static const struct snd_kcontrol_new sgtl5000_snd_controls[] = { 400 /* SOC_DOUBLE_S8_TLV with invert */ 401 { 402 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 403 .name = "PCM Playback Volume", 404 .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | 405 SNDRV_CTL_ELEM_ACCESS_READWRITE, 406 .info = dac_info_volsw, 407 .get = dac_get_volsw, 408 .put = dac_put_volsw, 409 }, 410 411 SOC_DOUBLE("Capture Volume", SGTL5000_CHIP_ANA_ADC_CTRL, 0, 4, 0xf, 0), 412 SOC_SINGLE_TLV("Capture Attenuate Switch (-6dB)", 413 SGTL5000_CHIP_ANA_ADC_CTRL, 414 8, 1, 0, capture_6db_attenuate), 415 SOC_SINGLE("Capture ZC Switch", SGTL5000_CHIP_ANA_CTRL, 1, 1, 0), 416 417 SOC_DOUBLE_TLV("Headphone Playback Volume", 418 SGTL5000_CHIP_ANA_HP_CTRL, 419 0, 8, 420 0x7f, 1, 421 headphone_volume), 422 SOC_SINGLE("Headphone Playback Switch", SGTL5000_CHIP_ANA_CTRL, 423 4, 1, 1), 424 SOC_SINGLE("Headphone Playback ZC Switch", SGTL5000_CHIP_ANA_CTRL, 425 5, 1, 0), 426 427 SOC_SINGLE_TLV("Mic Volume", SGTL5000_CHIP_MIC_CTRL, 428 0, 3, 0, mic_gain_tlv), 429 430 SOC_DOUBLE_TLV("Lineout Playback Volume", 431 SGTL5000_CHIP_LINE_OUT_VOL, 432 SGTL5000_LINE_OUT_VOL_LEFT_SHIFT, 433 SGTL5000_LINE_OUT_VOL_RIGHT_SHIFT, 434 0x1f, 1, 435 lineout_volume), 436 SOC_SINGLE("Lineout Playback Switch", SGTL5000_CHIP_ANA_CTRL, 8, 1, 1), 437 }; 438 439 /* mute the codec used by alsa core */ 440 static int sgtl5000_digital_mute(struct snd_soc_dai *codec_dai, int mute) 441 { 442 struct snd_soc_codec *codec = codec_dai->codec; 443 u16 adcdac_ctrl = SGTL5000_DAC_MUTE_LEFT | SGTL5000_DAC_MUTE_RIGHT; 444 445 snd_soc_update_bits(codec, SGTL5000_CHIP_ADCDAC_CTRL, 446 adcdac_ctrl, mute ? adcdac_ctrl : 0); 447 448 return 0; 449 } 450 451 /* set codec format */ 452 static int sgtl5000_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 453 { 454 struct snd_soc_codec *codec = codec_dai->codec; 455 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 456 u16 i2sctl = 0; 457 458 sgtl5000->master = 0; 459 /* 460 * i2s clock and frame master setting. 461 * ONLY support: 462 * - clock and frame slave, 463 * - clock and frame master 464 */ 465 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 466 case SND_SOC_DAIFMT_CBS_CFS: 467 break; 468 case SND_SOC_DAIFMT_CBM_CFM: 469 i2sctl |= SGTL5000_I2S_MASTER; 470 sgtl5000->master = 1; 471 break; 472 default: 473 return -EINVAL; 474 } 475 476 /* setting i2s data format */ 477 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 478 case SND_SOC_DAIFMT_DSP_A: 479 i2sctl |= SGTL5000_I2S_MODE_PCM << SGTL5000_I2S_MODE_SHIFT; 480 break; 481 case SND_SOC_DAIFMT_DSP_B: 482 i2sctl |= SGTL5000_I2S_MODE_PCM << SGTL5000_I2S_MODE_SHIFT; 483 i2sctl |= SGTL5000_I2S_LRALIGN; 484 break; 485 case SND_SOC_DAIFMT_I2S: 486 i2sctl |= SGTL5000_I2S_MODE_I2S_LJ << SGTL5000_I2S_MODE_SHIFT; 487 break; 488 case SND_SOC_DAIFMT_RIGHT_J: 489 i2sctl |= SGTL5000_I2S_MODE_RJ << SGTL5000_I2S_MODE_SHIFT; 490 i2sctl |= SGTL5000_I2S_LRPOL; 491 break; 492 case SND_SOC_DAIFMT_LEFT_J: 493 i2sctl |= SGTL5000_I2S_MODE_I2S_LJ << SGTL5000_I2S_MODE_SHIFT; 494 i2sctl |= SGTL5000_I2S_LRALIGN; 495 break; 496 default: 497 return -EINVAL; 498 } 499 500 sgtl5000->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK; 501 502 /* Clock inversion */ 503 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 504 case SND_SOC_DAIFMT_NB_NF: 505 break; 506 case SND_SOC_DAIFMT_IB_NF: 507 i2sctl |= SGTL5000_I2S_SCLK_INV; 508 break; 509 default: 510 return -EINVAL; 511 } 512 513 snd_soc_write(codec, SGTL5000_CHIP_I2S_CTRL, i2sctl); 514 515 return 0; 516 } 517 518 /* set codec sysclk */ 519 static int sgtl5000_set_dai_sysclk(struct snd_soc_dai *codec_dai, 520 int clk_id, unsigned int freq, int dir) 521 { 522 struct snd_soc_codec *codec = codec_dai->codec; 523 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 524 525 switch (clk_id) { 526 case SGTL5000_SYSCLK: 527 sgtl5000->sysclk = freq; 528 break; 529 default: 530 return -EINVAL; 531 } 532 533 return 0; 534 } 535 536 /* 537 * set clock according to i2s frame clock, 538 * sgtl5000 provides 2 clock sources: 539 * 1. sys_mclk: sample freq can only be configured to 540 * 1/256, 1/384, 1/512 of sys_mclk. 541 * 2. pll: can derive any audio clocks. 542 * 543 * clock setting rules: 544 * 1. in slave mode, only sys_mclk can be used 545 * 2. as constraint by sys_mclk, sample freq should be set to 32 kHz, 44.1 kHz 546 * and above. 547 * 3. usage of sys_mclk is preferred over pll to save power. 548 */ 549 static int sgtl5000_set_clock(struct snd_soc_codec *codec, int frame_rate) 550 { 551 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 552 int clk_ctl = 0; 553 int sys_fs; /* sample freq */ 554 555 /* 556 * sample freq should be divided by frame clock, 557 * if frame clock is lower than 44.1 kHz, sample freq should be set to 558 * 32 kHz or 44.1 kHz. 559 */ 560 switch (frame_rate) { 561 case 8000: 562 case 16000: 563 sys_fs = 32000; 564 break; 565 case 11025: 566 case 22050: 567 sys_fs = 44100; 568 break; 569 default: 570 sys_fs = frame_rate; 571 break; 572 } 573 574 /* set divided factor of frame clock */ 575 switch (sys_fs / frame_rate) { 576 case 4: 577 clk_ctl |= SGTL5000_RATE_MODE_DIV_4 << SGTL5000_RATE_MODE_SHIFT; 578 break; 579 case 2: 580 clk_ctl |= SGTL5000_RATE_MODE_DIV_2 << SGTL5000_RATE_MODE_SHIFT; 581 break; 582 case 1: 583 clk_ctl |= SGTL5000_RATE_MODE_DIV_1 << SGTL5000_RATE_MODE_SHIFT; 584 break; 585 default: 586 return -EINVAL; 587 } 588 589 /* set the sys_fs according to frame rate */ 590 switch (sys_fs) { 591 case 32000: 592 clk_ctl |= SGTL5000_SYS_FS_32k << SGTL5000_SYS_FS_SHIFT; 593 break; 594 case 44100: 595 clk_ctl |= SGTL5000_SYS_FS_44_1k << SGTL5000_SYS_FS_SHIFT; 596 break; 597 case 48000: 598 clk_ctl |= SGTL5000_SYS_FS_48k << SGTL5000_SYS_FS_SHIFT; 599 break; 600 case 96000: 601 clk_ctl |= SGTL5000_SYS_FS_96k << SGTL5000_SYS_FS_SHIFT; 602 break; 603 default: 604 dev_err(codec->dev, "frame rate %d not supported\n", 605 frame_rate); 606 return -EINVAL; 607 } 608 609 /* 610 * calculate the divider of mclk/sample_freq, 611 * factor of freq = 96 kHz can only be 256, since mclk is in the range 612 * of 8 MHz - 27 MHz 613 */ 614 switch (sgtl5000->sysclk / frame_rate) { 615 case 256: 616 clk_ctl |= SGTL5000_MCLK_FREQ_256FS << 617 SGTL5000_MCLK_FREQ_SHIFT; 618 break; 619 case 384: 620 clk_ctl |= SGTL5000_MCLK_FREQ_384FS << 621 SGTL5000_MCLK_FREQ_SHIFT; 622 break; 623 case 512: 624 clk_ctl |= SGTL5000_MCLK_FREQ_512FS << 625 SGTL5000_MCLK_FREQ_SHIFT; 626 break; 627 default: 628 /* if mclk does not satisfy the divider, use pll */ 629 if (sgtl5000->master) { 630 clk_ctl |= SGTL5000_MCLK_FREQ_PLL << 631 SGTL5000_MCLK_FREQ_SHIFT; 632 } else { 633 dev_err(codec->dev, 634 "PLL not supported in slave mode\n"); 635 dev_err(codec->dev, "%d ratio is not supported. " 636 "SYS_MCLK needs to be 256, 384 or 512 * fs\n", 637 sgtl5000->sysclk / frame_rate); 638 return -EINVAL; 639 } 640 } 641 642 /* if using pll, please check manual 6.4.2 for detail */ 643 if ((clk_ctl & SGTL5000_MCLK_FREQ_MASK) == SGTL5000_MCLK_FREQ_PLL) { 644 u64 out, t; 645 int div2; 646 int pll_ctl; 647 unsigned int in, int_div, frac_div; 648 649 if (sgtl5000->sysclk > 17000000) { 650 div2 = 1; 651 in = sgtl5000->sysclk / 2; 652 } else { 653 div2 = 0; 654 in = sgtl5000->sysclk; 655 } 656 if (sys_fs == 44100) 657 out = 180633600; 658 else 659 out = 196608000; 660 t = do_div(out, in); 661 int_div = out; 662 t *= 2048; 663 do_div(t, in); 664 frac_div = t; 665 pll_ctl = int_div << SGTL5000_PLL_INT_DIV_SHIFT | 666 frac_div << SGTL5000_PLL_FRAC_DIV_SHIFT; 667 668 snd_soc_write(codec, SGTL5000_CHIP_PLL_CTRL, pll_ctl); 669 if (div2) 670 snd_soc_update_bits(codec, 671 SGTL5000_CHIP_CLK_TOP_CTRL, 672 SGTL5000_INPUT_FREQ_DIV2, 673 SGTL5000_INPUT_FREQ_DIV2); 674 else 675 snd_soc_update_bits(codec, 676 SGTL5000_CHIP_CLK_TOP_CTRL, 677 SGTL5000_INPUT_FREQ_DIV2, 678 0); 679 680 /* power up pll */ 681 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 682 SGTL5000_PLL_POWERUP | SGTL5000_VCOAMP_POWERUP, 683 SGTL5000_PLL_POWERUP | SGTL5000_VCOAMP_POWERUP); 684 685 /* if using pll, clk_ctrl must be set after pll power up */ 686 snd_soc_write(codec, SGTL5000_CHIP_CLK_CTRL, clk_ctl); 687 } else { 688 /* otherwise, clk_ctrl must be set before pll power down */ 689 snd_soc_write(codec, SGTL5000_CHIP_CLK_CTRL, clk_ctl); 690 691 /* power down pll */ 692 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 693 SGTL5000_PLL_POWERUP | SGTL5000_VCOAMP_POWERUP, 694 0); 695 } 696 697 return 0; 698 } 699 700 /* 701 * Set PCM DAI bit size and sample rate. 702 * input: params_rate, params_fmt 703 */ 704 static int sgtl5000_pcm_hw_params(struct snd_pcm_substream *substream, 705 struct snd_pcm_hw_params *params, 706 struct snd_soc_dai *dai) 707 { 708 struct snd_soc_codec *codec = dai->codec; 709 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 710 int channels = params_channels(params); 711 int i2s_ctl = 0; 712 int stereo; 713 int ret; 714 715 /* sysclk should already set */ 716 if (!sgtl5000->sysclk) { 717 dev_err(codec->dev, "%s: set sysclk first!\n", __func__); 718 return -EFAULT; 719 } 720 721 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 722 stereo = SGTL5000_DAC_STEREO; 723 else 724 stereo = SGTL5000_ADC_STEREO; 725 726 /* set mono to save power */ 727 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, stereo, 728 channels == 1 ? 0 : stereo); 729 730 /* set codec clock base on lrclk */ 731 ret = sgtl5000_set_clock(codec, params_rate(params)); 732 if (ret) 733 return ret; 734 735 /* set i2s data format */ 736 switch (params_width(params)) { 737 case 16: 738 if (sgtl5000->fmt == SND_SOC_DAIFMT_RIGHT_J) 739 return -EINVAL; 740 i2s_ctl |= SGTL5000_I2S_DLEN_16 << SGTL5000_I2S_DLEN_SHIFT; 741 i2s_ctl |= SGTL5000_I2S_SCLKFREQ_32FS << 742 SGTL5000_I2S_SCLKFREQ_SHIFT; 743 break; 744 case 20: 745 i2s_ctl |= SGTL5000_I2S_DLEN_20 << SGTL5000_I2S_DLEN_SHIFT; 746 i2s_ctl |= SGTL5000_I2S_SCLKFREQ_64FS << 747 SGTL5000_I2S_SCLKFREQ_SHIFT; 748 break; 749 case 24: 750 i2s_ctl |= SGTL5000_I2S_DLEN_24 << SGTL5000_I2S_DLEN_SHIFT; 751 i2s_ctl |= SGTL5000_I2S_SCLKFREQ_64FS << 752 SGTL5000_I2S_SCLKFREQ_SHIFT; 753 break; 754 case 32: 755 if (sgtl5000->fmt == SND_SOC_DAIFMT_RIGHT_J) 756 return -EINVAL; 757 i2s_ctl |= SGTL5000_I2S_DLEN_32 << SGTL5000_I2S_DLEN_SHIFT; 758 i2s_ctl |= SGTL5000_I2S_SCLKFREQ_64FS << 759 SGTL5000_I2S_SCLKFREQ_SHIFT; 760 break; 761 default: 762 return -EINVAL; 763 } 764 765 snd_soc_update_bits(codec, SGTL5000_CHIP_I2S_CTRL, 766 SGTL5000_I2S_DLEN_MASK | SGTL5000_I2S_SCLKFREQ_MASK, 767 i2s_ctl); 768 769 return 0; 770 } 771 772 /* 773 * set dac bias 774 * common state changes: 775 * startup: 776 * off --> standby --> prepare --> on 777 * standby --> prepare --> on 778 * 779 * stop: 780 * on --> prepare --> standby 781 */ 782 static int sgtl5000_set_bias_level(struct snd_soc_codec *codec, 783 enum snd_soc_bias_level level) 784 { 785 switch (level) { 786 case SND_SOC_BIAS_ON: 787 case SND_SOC_BIAS_PREPARE: 788 case SND_SOC_BIAS_STANDBY: 789 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 790 SGTL5000_REFTOP_POWERUP, 791 SGTL5000_REFTOP_POWERUP); 792 break; 793 case SND_SOC_BIAS_OFF: 794 snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER, 795 SGTL5000_REFTOP_POWERUP, 0); 796 break; 797 } 798 799 return 0; 800 } 801 802 #define SGTL5000_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\ 803 SNDRV_PCM_FMTBIT_S20_3LE |\ 804 SNDRV_PCM_FMTBIT_S24_LE |\ 805 SNDRV_PCM_FMTBIT_S32_LE) 806 807 static const struct snd_soc_dai_ops sgtl5000_ops = { 808 .hw_params = sgtl5000_pcm_hw_params, 809 .digital_mute = sgtl5000_digital_mute, 810 .set_fmt = sgtl5000_set_dai_fmt, 811 .set_sysclk = sgtl5000_set_dai_sysclk, 812 }; 813 814 static struct snd_soc_dai_driver sgtl5000_dai = { 815 .name = "sgtl5000", 816 .playback = { 817 .stream_name = "Playback", 818 .channels_min = 1, 819 .channels_max = 2, 820 /* 821 * only support 8~48K + 96K, 822 * TODO modify hw_param to support more 823 */ 824 .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_96000, 825 .formats = SGTL5000_FORMATS, 826 }, 827 .capture = { 828 .stream_name = "Capture", 829 .channels_min = 1, 830 .channels_max = 2, 831 .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_96000, 832 .formats = SGTL5000_FORMATS, 833 }, 834 .ops = &sgtl5000_ops, 835 .symmetric_rates = 1, 836 }; 837 838 static bool sgtl5000_volatile(struct device *dev, unsigned int reg) 839 { 840 switch (reg) { 841 case SGTL5000_CHIP_ID: 842 case SGTL5000_CHIP_ADCDAC_CTRL: 843 case SGTL5000_CHIP_ANA_STATUS: 844 return true; 845 } 846 847 return false; 848 } 849 850 static bool sgtl5000_readable(struct device *dev, unsigned int reg) 851 { 852 switch (reg) { 853 case SGTL5000_CHIP_ID: 854 case SGTL5000_CHIP_DIG_POWER: 855 case SGTL5000_CHIP_CLK_CTRL: 856 case SGTL5000_CHIP_I2S_CTRL: 857 case SGTL5000_CHIP_SSS_CTRL: 858 case SGTL5000_CHIP_ADCDAC_CTRL: 859 case SGTL5000_CHIP_DAC_VOL: 860 case SGTL5000_CHIP_PAD_STRENGTH: 861 case SGTL5000_CHIP_ANA_ADC_CTRL: 862 case SGTL5000_CHIP_ANA_HP_CTRL: 863 case SGTL5000_CHIP_ANA_CTRL: 864 case SGTL5000_CHIP_LINREG_CTRL: 865 case SGTL5000_CHIP_REF_CTRL: 866 case SGTL5000_CHIP_MIC_CTRL: 867 case SGTL5000_CHIP_LINE_OUT_CTRL: 868 case SGTL5000_CHIP_LINE_OUT_VOL: 869 case SGTL5000_CHIP_ANA_POWER: 870 case SGTL5000_CHIP_PLL_CTRL: 871 case SGTL5000_CHIP_CLK_TOP_CTRL: 872 case SGTL5000_CHIP_ANA_STATUS: 873 case SGTL5000_CHIP_SHORT_CTRL: 874 case SGTL5000_CHIP_ANA_TEST2: 875 case SGTL5000_DAP_CTRL: 876 case SGTL5000_DAP_PEQ: 877 case SGTL5000_DAP_BASS_ENHANCE: 878 case SGTL5000_DAP_BASS_ENHANCE_CTRL: 879 case SGTL5000_DAP_AUDIO_EQ: 880 case SGTL5000_DAP_SURROUND: 881 case SGTL5000_DAP_FLT_COEF_ACCESS: 882 case SGTL5000_DAP_COEF_WR_B0_MSB: 883 case SGTL5000_DAP_COEF_WR_B0_LSB: 884 case SGTL5000_DAP_EQ_BASS_BAND0: 885 case SGTL5000_DAP_EQ_BASS_BAND1: 886 case SGTL5000_DAP_EQ_BASS_BAND2: 887 case SGTL5000_DAP_EQ_BASS_BAND3: 888 case SGTL5000_DAP_EQ_BASS_BAND4: 889 case SGTL5000_DAP_MAIN_CHAN: 890 case SGTL5000_DAP_MIX_CHAN: 891 case SGTL5000_DAP_AVC_CTRL: 892 case SGTL5000_DAP_AVC_THRESHOLD: 893 case SGTL5000_DAP_AVC_ATTACK: 894 case SGTL5000_DAP_AVC_DECAY: 895 case SGTL5000_DAP_COEF_WR_B1_MSB: 896 case SGTL5000_DAP_COEF_WR_B1_LSB: 897 case SGTL5000_DAP_COEF_WR_B2_MSB: 898 case SGTL5000_DAP_COEF_WR_B2_LSB: 899 case SGTL5000_DAP_COEF_WR_A1_MSB: 900 case SGTL5000_DAP_COEF_WR_A1_LSB: 901 case SGTL5000_DAP_COEF_WR_A2_MSB: 902 case SGTL5000_DAP_COEF_WR_A2_LSB: 903 return true; 904 905 default: 906 return false; 907 } 908 } 909 910 /* 911 * This precalculated table contains all (vag_val * 100 / lo_calcntrl) results 912 * to select an appropriate lo_vol_* in SGTL5000_CHIP_LINE_OUT_VOL 913 * The calculatation was done for all possible register values which 914 * is the array index and the following formula: 10^((idx−15)/40) * 100 915 */ 916 static const u8 vol_quot_table[] = { 917 42, 45, 47, 50, 53, 56, 60, 63, 918 67, 71, 75, 79, 84, 89, 94, 100, 919 106, 112, 119, 126, 133, 141, 150, 158, 920 168, 178, 188, 200, 211, 224, 237, 251 921 }; 922 923 /* 924 * sgtl5000 has 3 internal power supplies: 925 * 1. VAG, normally set to vdda/2 926 * 2. charge pump, set to different value 927 * according to voltage of vdda and vddio 928 * 3. line out VAG, normally set to vddio/2 929 * 930 * and should be set according to: 931 * 1. vddd provided by external or not 932 * 2. vdda and vddio voltage value. > 3.1v or not 933 */ 934 static int sgtl5000_set_power_regs(struct snd_soc_codec *codec) 935 { 936 int vddd; 937 int vdda; 938 int vddio; 939 u16 ana_pwr; 940 u16 lreg_ctrl; 941 int vag; 942 int lo_vag; 943 int vol_quot; 944 int lo_vol; 945 size_t i; 946 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 947 948 vdda = regulator_get_voltage(sgtl5000->supplies[VDDA].consumer); 949 vddio = regulator_get_voltage(sgtl5000->supplies[VDDIO].consumer); 950 vddd = (sgtl5000->num_supplies > VDDD) 951 ? regulator_get_voltage(sgtl5000->supplies[VDDD].consumer) 952 : LDO_VOLTAGE; 953 954 vdda = vdda / 1000; 955 vddio = vddio / 1000; 956 vddd = vddd / 1000; 957 958 if (vdda <= 0 || vddio <= 0 || vddd < 0) { 959 dev_err(codec->dev, "regulator voltage not set correctly\n"); 960 961 return -EINVAL; 962 } 963 964 /* according to datasheet, maximum voltage of supplies */ 965 if (vdda > 3600 || vddio > 3600 || vddd > 1980) { 966 dev_err(codec->dev, 967 "exceed max voltage vdda %dmV vddio %dmV vddd %dmV\n", 968 vdda, vddio, vddd); 969 970 return -EINVAL; 971 } 972 973 /* reset value */ 974 ana_pwr = snd_soc_read(codec, SGTL5000_CHIP_ANA_POWER); 975 ana_pwr |= SGTL5000_DAC_STEREO | 976 SGTL5000_ADC_STEREO | 977 SGTL5000_REFTOP_POWERUP; 978 lreg_ctrl = snd_soc_read(codec, SGTL5000_CHIP_LINREG_CTRL); 979 980 if (vddio < 3100 && vdda < 3100) { 981 /* enable internal oscillator used for charge pump */ 982 snd_soc_update_bits(codec, SGTL5000_CHIP_CLK_TOP_CTRL, 983 SGTL5000_INT_OSC_EN, 984 SGTL5000_INT_OSC_EN); 985 /* Enable VDDC charge pump */ 986 ana_pwr |= SGTL5000_VDDC_CHRGPMP_POWERUP; 987 } else if (vddio >= 3100 && vdda >= 3100) { 988 ana_pwr &= ~SGTL5000_VDDC_CHRGPMP_POWERUP; 989 /* VDDC use VDDIO rail */ 990 lreg_ctrl |= SGTL5000_VDDC_ASSN_OVRD; 991 lreg_ctrl |= SGTL5000_VDDC_MAN_ASSN_VDDIO << 992 SGTL5000_VDDC_MAN_ASSN_SHIFT; 993 } 994 995 snd_soc_write(codec, SGTL5000_CHIP_LINREG_CTRL, lreg_ctrl); 996 997 snd_soc_write(codec, SGTL5000_CHIP_ANA_POWER, ana_pwr); 998 999 /* 1000 * set ADC/DAC VAG to vdda / 2, 1001 * should stay in range (0.8v, 1.575v) 1002 */ 1003 vag = vdda / 2; 1004 if (vag <= SGTL5000_ANA_GND_BASE) 1005 vag = 0; 1006 else if (vag >= SGTL5000_ANA_GND_BASE + SGTL5000_ANA_GND_STP * 1007 (SGTL5000_ANA_GND_MASK >> SGTL5000_ANA_GND_SHIFT)) 1008 vag = SGTL5000_ANA_GND_MASK >> SGTL5000_ANA_GND_SHIFT; 1009 else 1010 vag = (vag - SGTL5000_ANA_GND_BASE) / SGTL5000_ANA_GND_STP; 1011 1012 snd_soc_update_bits(codec, SGTL5000_CHIP_REF_CTRL, 1013 SGTL5000_ANA_GND_MASK, vag << SGTL5000_ANA_GND_SHIFT); 1014 1015 /* set line out VAG to vddio / 2, in range (0.8v, 1.675v) */ 1016 lo_vag = vddio / 2; 1017 if (lo_vag <= SGTL5000_LINE_OUT_GND_BASE) 1018 lo_vag = 0; 1019 else if (lo_vag >= SGTL5000_LINE_OUT_GND_BASE + 1020 SGTL5000_LINE_OUT_GND_STP * SGTL5000_LINE_OUT_GND_MAX) 1021 lo_vag = SGTL5000_LINE_OUT_GND_MAX; 1022 else 1023 lo_vag = (lo_vag - SGTL5000_LINE_OUT_GND_BASE) / 1024 SGTL5000_LINE_OUT_GND_STP; 1025 1026 snd_soc_update_bits(codec, SGTL5000_CHIP_LINE_OUT_CTRL, 1027 SGTL5000_LINE_OUT_CURRENT_MASK | 1028 SGTL5000_LINE_OUT_GND_MASK, 1029 lo_vag << SGTL5000_LINE_OUT_GND_SHIFT | 1030 SGTL5000_LINE_OUT_CURRENT_360u << 1031 SGTL5000_LINE_OUT_CURRENT_SHIFT); 1032 1033 /* 1034 * Set lineout output level in range (0..31) 1035 * the same value is used for right and left channel 1036 * 1037 * Searching for a suitable index solving this formula: 1038 * idx = 40 * log10(vag_val / lo_cagcntrl) + 15 1039 */ 1040 vol_quot = (vag * 100) / lo_vag; 1041 lo_vol = 0; 1042 for (i = 0; i < ARRAY_SIZE(vol_quot_table); i++) { 1043 if (vol_quot >= vol_quot_table[i]) 1044 lo_vol = i; 1045 else 1046 break; 1047 } 1048 1049 snd_soc_update_bits(codec, SGTL5000_CHIP_LINE_OUT_VOL, 1050 SGTL5000_LINE_OUT_VOL_RIGHT_MASK | 1051 SGTL5000_LINE_OUT_VOL_LEFT_MASK, 1052 lo_vol << SGTL5000_LINE_OUT_VOL_RIGHT_SHIFT | 1053 lo_vol << SGTL5000_LINE_OUT_VOL_LEFT_SHIFT); 1054 1055 return 0; 1056 } 1057 1058 static int sgtl5000_enable_regulators(struct i2c_client *client) 1059 { 1060 int ret; 1061 int i; 1062 int external_vddd = 0; 1063 struct regulator *vddd; 1064 struct sgtl5000_priv *sgtl5000 = i2c_get_clientdata(client); 1065 1066 for (i = 0; i < ARRAY_SIZE(sgtl5000->supplies); i++) 1067 sgtl5000->supplies[i].supply = supply_names[i]; 1068 1069 vddd = regulator_get_optional(&client->dev, "VDDD"); 1070 if (IS_ERR(vddd)) { 1071 /* See if it's just not registered yet */ 1072 if (PTR_ERR(vddd) == -EPROBE_DEFER) 1073 return -EPROBE_DEFER; 1074 } else { 1075 external_vddd = 1; 1076 regulator_put(vddd); 1077 } 1078 1079 sgtl5000->num_supplies = ARRAY_SIZE(sgtl5000->supplies) 1080 - 1 + external_vddd; 1081 ret = regulator_bulk_get(&client->dev, sgtl5000->num_supplies, 1082 sgtl5000->supplies); 1083 if (ret) 1084 return ret; 1085 1086 ret = regulator_bulk_enable(sgtl5000->num_supplies, 1087 sgtl5000->supplies); 1088 if (!ret) 1089 usleep_range(10, 20); 1090 else 1091 regulator_bulk_free(sgtl5000->num_supplies, 1092 sgtl5000->supplies); 1093 1094 return ret; 1095 } 1096 1097 static int sgtl5000_probe(struct snd_soc_codec *codec) 1098 { 1099 int ret; 1100 u16 reg; 1101 struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec); 1102 1103 /* power up sgtl5000 */ 1104 ret = sgtl5000_set_power_regs(codec); 1105 if (ret) 1106 goto err; 1107 1108 /* enable small pop, introduce 400ms delay in turning off */ 1109 snd_soc_update_bits(codec, SGTL5000_CHIP_REF_CTRL, 1110 SGTL5000_SMALL_POP, 1); 1111 1112 /* disable short cut detector */ 1113 snd_soc_write(codec, SGTL5000_CHIP_SHORT_CTRL, 0); 1114 1115 /* 1116 * set i2s as default input of sound switch 1117 * TODO: add sound switch to control and dapm widge. 1118 */ 1119 snd_soc_write(codec, SGTL5000_CHIP_SSS_CTRL, 1120 SGTL5000_DAC_SEL_I2S_IN << SGTL5000_DAC_SEL_SHIFT); 1121 snd_soc_write(codec, SGTL5000_CHIP_DIG_POWER, 1122 SGTL5000_ADC_EN | SGTL5000_DAC_EN); 1123 1124 /* enable dac volume ramp by default */ 1125 snd_soc_write(codec, SGTL5000_CHIP_ADCDAC_CTRL, 1126 SGTL5000_DAC_VOL_RAMP_EN | 1127 SGTL5000_DAC_MUTE_RIGHT | 1128 SGTL5000_DAC_MUTE_LEFT); 1129 1130 reg = ((sgtl5000->lrclk_strength) << SGTL5000_PAD_I2S_LRCLK_SHIFT | 0x5f); 1131 snd_soc_write(codec, SGTL5000_CHIP_PAD_STRENGTH, reg); 1132 1133 snd_soc_write(codec, SGTL5000_CHIP_ANA_CTRL, 1134 SGTL5000_HP_ZCD_EN | 1135 SGTL5000_ADC_ZCD_EN); 1136 1137 snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, 1138 SGTL5000_BIAS_R_MASK, 1139 sgtl5000->micbias_resistor << SGTL5000_BIAS_R_SHIFT); 1140 1141 snd_soc_update_bits(codec, SGTL5000_CHIP_MIC_CTRL, 1142 SGTL5000_BIAS_VOLT_MASK, 1143 sgtl5000->micbias_voltage << SGTL5000_BIAS_VOLT_SHIFT); 1144 /* 1145 * disable DAP 1146 * TODO: 1147 * Enable DAP in kcontrol and dapm. 1148 */ 1149 snd_soc_write(codec, SGTL5000_DAP_CTRL, 0); 1150 1151 return 0; 1152 1153 err: 1154 return ret; 1155 } 1156 1157 static int sgtl5000_remove(struct snd_soc_codec *codec) 1158 { 1159 return 0; 1160 } 1161 1162 static struct snd_soc_codec_driver sgtl5000_driver = { 1163 .probe = sgtl5000_probe, 1164 .remove = sgtl5000_remove, 1165 .set_bias_level = sgtl5000_set_bias_level, 1166 .suspend_bias_off = true, 1167 .component_driver = { 1168 .controls = sgtl5000_snd_controls, 1169 .num_controls = ARRAY_SIZE(sgtl5000_snd_controls), 1170 .dapm_widgets = sgtl5000_dapm_widgets, 1171 .num_dapm_widgets = ARRAY_SIZE(sgtl5000_dapm_widgets), 1172 .dapm_routes = sgtl5000_dapm_routes, 1173 .num_dapm_routes = ARRAY_SIZE(sgtl5000_dapm_routes), 1174 }, 1175 }; 1176 1177 static const struct regmap_config sgtl5000_regmap = { 1178 .reg_bits = 16, 1179 .val_bits = 16, 1180 .reg_stride = 2, 1181 1182 .max_register = SGTL5000_MAX_REG_OFFSET, 1183 .volatile_reg = sgtl5000_volatile, 1184 .readable_reg = sgtl5000_readable, 1185 1186 .cache_type = REGCACHE_RBTREE, 1187 .reg_defaults = sgtl5000_reg_defaults, 1188 .num_reg_defaults = ARRAY_SIZE(sgtl5000_reg_defaults), 1189 }; 1190 1191 /* 1192 * Write all the default values from sgtl5000_reg_defaults[] array into the 1193 * sgtl5000 registers, to make sure we always start with the sane registers 1194 * values as stated in the datasheet. 1195 * 1196 * Since sgtl5000 does not have a reset line, nor a reset command in software, 1197 * we follow this approach to guarantee we always start from the default values 1198 * and avoid problems like, not being able to probe after an audio playback 1199 * followed by a system reset or a 'reboot' command in Linux 1200 */ 1201 static void sgtl5000_fill_defaults(struct i2c_client *client) 1202 { 1203 struct sgtl5000_priv *sgtl5000 = i2c_get_clientdata(client); 1204 int i, ret, val, index; 1205 1206 for (i = 0; i < ARRAY_SIZE(sgtl5000_reg_defaults); i++) { 1207 val = sgtl5000_reg_defaults[i].def; 1208 index = sgtl5000_reg_defaults[i].reg; 1209 ret = regmap_write(sgtl5000->regmap, index, val); 1210 if (ret) 1211 dev_err(&client->dev, 1212 "%s: error %d setting reg 0x%02x to 0x%04x\n", 1213 __func__, ret, index, val); 1214 } 1215 } 1216 1217 static int sgtl5000_i2c_probe(struct i2c_client *client, 1218 const struct i2c_device_id *id) 1219 { 1220 struct sgtl5000_priv *sgtl5000; 1221 int ret, reg, rev; 1222 struct device_node *np = client->dev.of_node; 1223 u32 value; 1224 u16 ana_pwr; 1225 1226 sgtl5000 = devm_kzalloc(&client->dev, sizeof(*sgtl5000), GFP_KERNEL); 1227 if (!sgtl5000) 1228 return -ENOMEM; 1229 1230 i2c_set_clientdata(client, sgtl5000); 1231 1232 ret = sgtl5000_enable_regulators(client); 1233 if (ret) 1234 return ret; 1235 1236 sgtl5000->regmap = devm_regmap_init_i2c(client, &sgtl5000_regmap); 1237 if (IS_ERR(sgtl5000->regmap)) { 1238 ret = PTR_ERR(sgtl5000->regmap); 1239 dev_err(&client->dev, "Failed to allocate regmap: %d\n", ret); 1240 goto disable_regs; 1241 } 1242 1243 sgtl5000->mclk = devm_clk_get(&client->dev, NULL); 1244 if (IS_ERR(sgtl5000->mclk)) { 1245 ret = PTR_ERR(sgtl5000->mclk); 1246 dev_err(&client->dev, "Failed to get mclock: %d\n", ret); 1247 /* Defer the probe to see if the clk will be provided later */ 1248 if (ret == -ENOENT) 1249 ret = -EPROBE_DEFER; 1250 goto disable_regs; 1251 } 1252 1253 ret = clk_prepare_enable(sgtl5000->mclk); 1254 if (ret) { 1255 dev_err(&client->dev, "Error enabling clock %d\n", ret); 1256 goto disable_regs; 1257 } 1258 1259 /* Need 8 clocks before I2C accesses */ 1260 udelay(1); 1261 1262 /* read chip information */ 1263 ret = regmap_read(sgtl5000->regmap, SGTL5000_CHIP_ID, ®); 1264 if (ret) { 1265 dev_err(&client->dev, "Error reading chip id %d\n", ret); 1266 goto disable_clk; 1267 } 1268 1269 if (((reg & SGTL5000_PARTID_MASK) >> SGTL5000_PARTID_SHIFT) != 1270 SGTL5000_PARTID_PART_ID) { 1271 dev_err(&client->dev, 1272 "Device with ID register %x is not a sgtl5000\n", reg); 1273 ret = -ENODEV; 1274 goto disable_clk; 1275 } 1276 1277 rev = (reg & SGTL5000_REVID_MASK) >> SGTL5000_REVID_SHIFT; 1278 dev_info(&client->dev, "sgtl5000 revision 0x%x\n", rev); 1279 sgtl5000->revision = rev; 1280 1281 /* reconfigure the clocks in case we're using the PLL */ 1282 ret = regmap_write(sgtl5000->regmap, 1283 SGTL5000_CHIP_CLK_CTRL, 1284 SGTL5000_CHIP_CLK_CTRL_DEFAULT); 1285 if (ret) 1286 dev_err(&client->dev, 1287 "Error %d initializing CHIP_CLK_CTRL\n", ret); 1288 1289 /* Follow section 2.2.1.1 of AN3663 */ 1290 ana_pwr = SGTL5000_ANA_POWER_DEFAULT; 1291 if (sgtl5000->num_supplies <= VDDD) { 1292 /* internal VDDD at 1.2V */ 1293 ret = regmap_update_bits(sgtl5000->regmap, 1294 SGTL5000_CHIP_LINREG_CTRL, 1295 SGTL5000_LINREG_VDDD_MASK, 1296 LINREG_VDDD); 1297 if (ret) 1298 dev_err(&client->dev, 1299 "Error %d setting LINREG_VDDD\n", ret); 1300 1301 ana_pwr |= SGTL5000_LINEREG_D_POWERUP; 1302 dev_info(&client->dev, 1303 "Using internal LDO instead of VDDD: check ER1\n"); 1304 } else { 1305 /* using external LDO for VDDD 1306 * Clear startup powerup and simple powerup 1307 * bits to save power 1308 */ 1309 ana_pwr &= ~(SGTL5000_STARTUP_POWERUP 1310 | SGTL5000_LINREG_SIMPLE_POWERUP); 1311 dev_dbg(&client->dev, "Using external VDDD\n"); 1312 } 1313 ret = regmap_write(sgtl5000->regmap, SGTL5000_CHIP_ANA_POWER, ana_pwr); 1314 if (ret) 1315 dev_err(&client->dev, 1316 "Error %d setting CHIP_ANA_POWER to %04x\n", 1317 ret, ana_pwr); 1318 1319 if (np) { 1320 if (!of_property_read_u32(np, 1321 "micbias-resistor-k-ohms", &value)) { 1322 switch (value) { 1323 case SGTL5000_MICBIAS_OFF: 1324 sgtl5000->micbias_resistor = 0; 1325 break; 1326 case SGTL5000_MICBIAS_2K: 1327 sgtl5000->micbias_resistor = 1; 1328 break; 1329 case SGTL5000_MICBIAS_4K: 1330 sgtl5000->micbias_resistor = 2; 1331 break; 1332 case SGTL5000_MICBIAS_8K: 1333 sgtl5000->micbias_resistor = 3; 1334 break; 1335 default: 1336 sgtl5000->micbias_resistor = 2; 1337 dev_err(&client->dev, 1338 "Unsuitable MicBias resistor\n"); 1339 } 1340 } else { 1341 /* default is 4Kohms */ 1342 sgtl5000->micbias_resistor = 2; 1343 } 1344 if (!of_property_read_u32(np, 1345 "micbias-voltage-m-volts", &value)) { 1346 /* 1250mV => 0 */ 1347 /* steps of 250mV */ 1348 if ((value >= 1250) && (value <= 3000)) 1349 sgtl5000->micbias_voltage = (value / 250) - 5; 1350 else { 1351 sgtl5000->micbias_voltage = 0; 1352 dev_err(&client->dev, 1353 "Unsuitable MicBias voltage\n"); 1354 } 1355 } else { 1356 sgtl5000->micbias_voltage = 0; 1357 } 1358 } 1359 1360 sgtl5000->lrclk_strength = I2S_LRCLK_STRENGTH_LOW; 1361 if (!of_property_read_u32(np, "lrclk-strength", &value)) { 1362 if (value > I2S_LRCLK_STRENGTH_HIGH) 1363 value = I2S_LRCLK_STRENGTH_LOW; 1364 sgtl5000->lrclk_strength = value; 1365 } 1366 1367 /* Ensure sgtl5000 will start with sane register values */ 1368 sgtl5000_fill_defaults(client); 1369 1370 ret = snd_soc_register_codec(&client->dev, 1371 &sgtl5000_driver, &sgtl5000_dai, 1); 1372 if (ret) 1373 goto disable_clk; 1374 1375 return 0; 1376 1377 disable_clk: 1378 clk_disable_unprepare(sgtl5000->mclk); 1379 1380 disable_regs: 1381 regulator_bulk_disable(sgtl5000->num_supplies, sgtl5000->supplies); 1382 regulator_bulk_free(sgtl5000->num_supplies, sgtl5000->supplies); 1383 1384 return ret; 1385 } 1386 1387 static int sgtl5000_i2c_remove(struct i2c_client *client) 1388 { 1389 struct sgtl5000_priv *sgtl5000 = i2c_get_clientdata(client); 1390 1391 snd_soc_unregister_codec(&client->dev); 1392 clk_disable_unprepare(sgtl5000->mclk); 1393 regulator_bulk_disable(sgtl5000->num_supplies, sgtl5000->supplies); 1394 regulator_bulk_free(sgtl5000->num_supplies, sgtl5000->supplies); 1395 1396 return 0; 1397 } 1398 1399 static const struct i2c_device_id sgtl5000_id[] = { 1400 {"sgtl5000", 0}, 1401 {}, 1402 }; 1403 1404 MODULE_DEVICE_TABLE(i2c, sgtl5000_id); 1405 1406 static const struct of_device_id sgtl5000_dt_ids[] = { 1407 { .compatible = "fsl,sgtl5000", }, 1408 { /* sentinel */ } 1409 }; 1410 MODULE_DEVICE_TABLE(of, sgtl5000_dt_ids); 1411 1412 static struct i2c_driver sgtl5000_i2c_driver = { 1413 .driver = { 1414 .name = "sgtl5000", 1415 .of_match_table = sgtl5000_dt_ids, 1416 }, 1417 .probe = sgtl5000_i2c_probe, 1418 .remove = sgtl5000_i2c_remove, 1419 .id_table = sgtl5000_id, 1420 }; 1421 1422 module_i2c_driver(sgtl5000_i2c_driver); 1423 1424 MODULE_DESCRIPTION("Freescale SGTL5000 ALSA SoC Codec Driver"); 1425 MODULE_AUTHOR("Zeng Zhaoming <zengzm.kernel@gmail.com>"); 1426 MODULE_LICENSE("GPL"); 1427