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