1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * wm8974.c -- WM8974 ALSA Soc Audio driver 4 * 5 * Copyright 2006-2009 Wolfson Microelectronics PLC. 6 * 7 * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/init.h> 13 #include <linux/delay.h> 14 #include <linux/pm.h> 15 #include <linux/i2c.h> 16 #include <linux/regmap.h> 17 #include <linux/slab.h> 18 #include <sound/core.h> 19 #include <sound/pcm.h> 20 #include <sound/pcm_params.h> 21 #include <sound/soc.h> 22 #include <sound/initval.h> 23 #include <sound/tlv.h> 24 25 #include "wm8974.h" 26 27 struct wm8974_priv { 28 unsigned int mclk; 29 unsigned int fs; 30 }; 31 32 static const struct reg_default wm8974_reg_defaults[] = { 33 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 }, 34 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 }, 35 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff }, 36 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff }, 37 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c }, 38 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 }, 39 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 }, 40 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 }, 41 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 }, 42 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 }, 43 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 }, 44 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 }, 45 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 }, 46 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 }, 47 { 56, 0x0000 }, 48 }; 49 50 #define WM8974_POWER1_BIASEN 0x08 51 #define WM8974_POWER1_BUFIOEN 0x04 52 53 #define wm8974_reset(c) snd_soc_component_write(c, WM8974_RESET, 0) 54 55 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" }; 56 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" }; 57 static const char *wm8974_eqmode[] = {"Capture", "Playback" }; 58 static const char *wm8974_bw[] = {"Narrow", "Wide" }; 59 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" }; 60 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" }; 61 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" }; 62 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" }; 63 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" }; 64 static const char *wm8974_alc[] = {"ALC", "Limiter" }; 65 66 static const struct soc_enum wm8974_enum[] = { 67 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */ 68 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */ 69 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp), 70 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode), 71 72 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1), 73 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw), 74 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2), 75 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw), 76 77 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3), 78 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw), 79 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4), 80 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw), 81 82 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5), 83 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc), 84 }; 85 86 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" }; 87 88 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode, 89 WM8974_INPUT, 3, wm8974_auxmode_text); 90 91 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); 92 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); 93 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); 94 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); 95 96 static const struct snd_kcontrol_new wm8974_snd_controls[] = { 97 98 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0), 99 100 SOC_ENUM("DAC Companding", wm8974_enum[1]), 101 SOC_ENUM("ADC Companding", wm8974_enum[0]), 102 103 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]), 104 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0), 105 106 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv), 107 108 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0), 109 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0), 110 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0), 111 112 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv), 113 114 SOC_ENUM("Equaliser Function", wm8974_enum[3]), 115 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]), 116 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv), 117 118 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]), 119 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]), 120 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv), 121 122 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]), 123 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]), 124 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv), 125 126 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]), 127 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]), 128 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv), 129 130 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]), 131 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]), 132 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv), 133 134 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0), 135 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0), 136 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0), 137 138 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0), 139 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0), 140 141 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0), 142 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0), 143 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0), 144 145 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0), 146 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0), 147 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0), 148 149 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]), 150 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0), 151 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0), 152 153 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0), 154 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0), 155 156 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0), 157 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv), 158 159 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0), 160 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1), 161 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv), 162 163 SOC_ENUM("Aux Mode", wm8974_auxmode), 164 165 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0), 166 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1), 167 168 /* DAC / ADC oversampling */ 169 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0), 170 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0), 171 }; 172 173 /* Speaker Output Mixer */ 174 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = { 175 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0), 176 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0), 177 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0), 178 }; 179 180 /* Mono Output Mixer */ 181 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = { 182 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0), 183 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0), 184 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0), 185 }; 186 187 /* Boost mixer */ 188 static const struct snd_kcontrol_new wm8974_boost_mixer[] = { 189 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 1), 190 }; 191 192 /* Input PGA */ 193 static const struct snd_kcontrol_new wm8974_inpga[] = { 194 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0), 195 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0), 196 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0), 197 }; 198 199 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = { 200 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0, 201 &wm8974_speaker_mixer_controls[0], 202 ARRAY_SIZE(wm8974_speaker_mixer_controls)), 203 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0, 204 &wm8974_mono_mixer_controls[0], 205 ARRAY_SIZE(wm8974_mono_mixer_controls)), 206 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0), 207 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0), 208 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0), 209 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0), 210 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0), 211 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0), 212 213 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga, 214 ARRAY_SIZE(wm8974_inpga)), 215 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, 216 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)), 217 218 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0), 219 220 SND_SOC_DAPM_INPUT("MICN"), 221 SND_SOC_DAPM_INPUT("MICP"), 222 SND_SOC_DAPM_INPUT("AUX"), 223 SND_SOC_DAPM_OUTPUT("MONOOUT"), 224 SND_SOC_DAPM_OUTPUT("SPKOUTP"), 225 SND_SOC_DAPM_OUTPUT("SPKOUTN"), 226 }; 227 228 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = { 229 /* Mono output mixer */ 230 {"Mono Mixer", "PCM Playback Switch", "DAC"}, 231 {"Mono Mixer", "Aux Playback Switch", "Aux Input"}, 232 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"}, 233 234 /* Speaker output mixer */ 235 {"Speaker Mixer", "PCM Playback Switch", "DAC"}, 236 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"}, 237 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"}, 238 239 /* Outputs */ 240 {"Mono Out", NULL, "Mono Mixer"}, 241 {"MONOOUT", NULL, "Mono Out"}, 242 {"SpkN Out", NULL, "Speaker Mixer"}, 243 {"SpkP Out", NULL, "Speaker Mixer"}, 244 {"SPKOUTN", NULL, "SpkN Out"}, 245 {"SPKOUTP", NULL, "SpkP Out"}, 246 247 /* Boost Mixer */ 248 {"ADC", NULL, "Boost Mixer"}, 249 {"Boost Mixer", "Aux Switch", "Aux Input"}, 250 {"Boost Mixer", NULL, "Input PGA"}, 251 {"Boost Mixer", NULL, "MICP"}, 252 253 /* Input PGA */ 254 {"Input PGA", "Aux Switch", "Aux Input"}, 255 {"Input PGA", "MicN Switch", "MICN"}, 256 {"Input PGA", "MicP Switch", "MICP"}, 257 258 /* Inputs */ 259 {"Aux Input", NULL, "AUX"}, 260 }; 261 262 struct pll_ { 263 unsigned int pre_div:1; 264 unsigned int n:4; 265 unsigned int k; 266 }; 267 268 /* The size in bits of the pll divide multiplied by 10 269 * to allow rounding later */ 270 #define FIXED_PLL_SIZE ((1 << 24) * 10) 271 272 static void pll_factors(struct pll_ *pll_div, 273 unsigned int target, unsigned int source) 274 { 275 unsigned long long Kpart; 276 unsigned int K, Ndiv, Nmod; 277 278 /* There is a fixed divide by 4 in the output path */ 279 target *= 4; 280 281 Ndiv = target / source; 282 if (Ndiv < 6) { 283 source /= 2; 284 pll_div->pre_div = 1; 285 Ndiv = target / source; 286 } else 287 pll_div->pre_div = 0; 288 289 if ((Ndiv < 6) || (Ndiv > 12)) 290 printk(KERN_WARNING 291 "WM8974 N value %u outwith recommended range!\n", 292 Ndiv); 293 294 pll_div->n = Ndiv; 295 Nmod = target % source; 296 Kpart = FIXED_PLL_SIZE * (long long)Nmod; 297 298 do_div(Kpart, source); 299 300 K = Kpart & 0xFFFFFFFF; 301 302 /* Check if we need to round */ 303 if ((K % 10) >= 5) 304 K += 5; 305 306 /* Move down to proper range now rounding is done */ 307 K /= 10; 308 309 pll_div->k = K; 310 } 311 312 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id, 313 int source, unsigned int freq_in, unsigned int freq_out) 314 { 315 struct snd_soc_component *component = codec_dai->component; 316 struct pll_ pll_div; 317 u16 reg; 318 319 if (freq_in == 0 || freq_out == 0) { 320 /* Clock CODEC directly from MCLK */ 321 reg = snd_soc_component_read(component, WM8974_CLOCK); 322 snd_soc_component_write(component, WM8974_CLOCK, reg & 0x0ff); 323 324 /* Turn off PLL */ 325 reg = snd_soc_component_read(component, WM8974_POWER1); 326 snd_soc_component_write(component, WM8974_POWER1, reg & 0x1df); 327 return 0; 328 } 329 330 pll_factors(&pll_div, freq_out, freq_in); 331 332 snd_soc_component_write(component, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n); 333 snd_soc_component_write(component, WM8974_PLLK1, pll_div.k >> 18); 334 snd_soc_component_write(component, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff); 335 snd_soc_component_write(component, WM8974_PLLK3, pll_div.k & 0x1ff); 336 reg = snd_soc_component_read(component, WM8974_POWER1); 337 snd_soc_component_write(component, WM8974_POWER1, reg | 0x020); 338 339 /* Run CODEC from PLL instead of MCLK */ 340 reg = snd_soc_component_read(component, WM8974_CLOCK); 341 snd_soc_component_write(component, WM8974_CLOCK, reg | 0x100); 342 343 return 0; 344 } 345 346 /* 347 * Configure WM8974 clock dividers. 348 */ 349 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai, 350 int div_id, int div) 351 { 352 struct snd_soc_component *component = codec_dai->component; 353 u16 reg; 354 355 switch (div_id) { 356 case WM8974_OPCLKDIV: 357 reg = snd_soc_component_read(component, WM8974_GPIO) & 0x1cf; 358 snd_soc_component_write(component, WM8974_GPIO, reg | div); 359 break; 360 case WM8974_MCLKDIV: 361 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x11f; 362 snd_soc_component_write(component, WM8974_CLOCK, reg | div); 363 break; 364 case WM8974_BCLKDIV: 365 reg = snd_soc_component_read(component, WM8974_CLOCK) & 0x1e3; 366 snd_soc_component_write(component, WM8974_CLOCK, reg | div); 367 break; 368 default: 369 return -EINVAL; 370 } 371 372 return 0; 373 } 374 375 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out, 376 int *mclkdiv) 377 { 378 unsigned int ratio = 2 * f_in / f_out; 379 380 if (ratio <= 2) { 381 *mclkdiv = WM8974_MCLKDIV_1; 382 ratio = 2; 383 } else if (ratio == 3) { 384 *mclkdiv = WM8974_MCLKDIV_1_5; 385 } else if (ratio == 4) { 386 *mclkdiv = WM8974_MCLKDIV_2; 387 } else if (ratio <= 6) { 388 *mclkdiv = WM8974_MCLKDIV_3; 389 ratio = 6; 390 } else if (ratio <= 8) { 391 *mclkdiv = WM8974_MCLKDIV_4; 392 ratio = 8; 393 } else if (ratio <= 12) { 394 *mclkdiv = WM8974_MCLKDIV_6; 395 ratio = 12; 396 } else if (ratio <= 16) { 397 *mclkdiv = WM8974_MCLKDIV_8; 398 ratio = 16; 399 } else { 400 *mclkdiv = WM8974_MCLKDIV_12; 401 ratio = 24; 402 } 403 404 return f_out * ratio / 2; 405 } 406 407 static int wm8974_update_clocks(struct snd_soc_dai *dai) 408 { 409 struct snd_soc_component *component = dai->component; 410 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component); 411 unsigned int fs256; 412 unsigned int fpll = 0; 413 unsigned int f; 414 int mclkdiv; 415 416 if (!priv->mclk || !priv->fs) 417 return 0; 418 419 fs256 = 256 * priv->fs; 420 421 f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv); 422 423 if (f != priv->mclk) { 424 /* The PLL performs best around 90MHz */ 425 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv); 426 } 427 428 wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll); 429 wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv); 430 431 return 0; 432 } 433 434 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, 435 unsigned int freq, int dir) 436 { 437 struct snd_soc_component *component = dai->component; 438 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component); 439 440 if (dir != SND_SOC_CLOCK_IN) 441 return -EINVAL; 442 443 priv->mclk = freq; 444 445 return wm8974_update_clocks(dai); 446 } 447 448 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai, 449 unsigned int fmt) 450 { 451 struct snd_soc_component *component = codec_dai->component; 452 u16 iface = 0; 453 u16 clk = snd_soc_component_read(component, WM8974_CLOCK) & 0x1fe; 454 455 /* set master/slave audio interface */ 456 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 457 case SND_SOC_DAIFMT_CBM_CFM: 458 clk |= 0x0001; 459 break; 460 case SND_SOC_DAIFMT_CBS_CFS: 461 break; 462 default: 463 return -EINVAL; 464 } 465 466 /* interface format */ 467 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 468 case SND_SOC_DAIFMT_I2S: 469 iface |= 0x0010; 470 break; 471 case SND_SOC_DAIFMT_RIGHT_J: 472 break; 473 case SND_SOC_DAIFMT_LEFT_J: 474 iface |= 0x0008; 475 break; 476 case SND_SOC_DAIFMT_DSP_A: 477 if ((fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_IB_IF || 478 (fmt & SND_SOC_DAIFMT_INV_MASK) == SND_SOC_DAIFMT_NB_IF) { 479 return -EINVAL; 480 } 481 iface |= 0x00018; 482 break; 483 default: 484 return -EINVAL; 485 } 486 487 /* clock inversion */ 488 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 489 case SND_SOC_DAIFMT_NB_NF: 490 break; 491 case SND_SOC_DAIFMT_IB_IF: 492 iface |= 0x0180; 493 break; 494 case SND_SOC_DAIFMT_IB_NF: 495 iface |= 0x0100; 496 break; 497 case SND_SOC_DAIFMT_NB_IF: 498 iface |= 0x0080; 499 break; 500 default: 501 return -EINVAL; 502 } 503 504 snd_soc_component_write(component, WM8974_IFACE, iface); 505 snd_soc_component_write(component, WM8974_CLOCK, clk); 506 return 0; 507 } 508 509 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream, 510 struct snd_pcm_hw_params *params, 511 struct snd_soc_dai *dai) 512 { 513 struct snd_soc_component *component = dai->component; 514 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component); 515 u16 iface = snd_soc_component_read(component, WM8974_IFACE) & 0x19f; 516 u16 adn = snd_soc_component_read(component, WM8974_ADD) & 0x1f1; 517 int err; 518 519 priv->fs = params_rate(params); 520 err = wm8974_update_clocks(dai); 521 if (err) 522 return err; 523 524 /* bit size */ 525 switch (params_width(params)) { 526 case 16: 527 break; 528 case 20: 529 iface |= 0x0020; 530 break; 531 case 24: 532 iface |= 0x0040; 533 break; 534 case 32: 535 iface |= 0x0060; 536 break; 537 } 538 539 /* filter coefficient */ 540 switch (params_rate(params)) { 541 case 8000: 542 adn |= 0x5 << 1; 543 break; 544 case 11025: 545 adn |= 0x4 << 1; 546 break; 547 case 16000: 548 adn |= 0x3 << 1; 549 break; 550 case 22050: 551 adn |= 0x2 << 1; 552 break; 553 case 32000: 554 adn |= 0x1 << 1; 555 break; 556 case 44100: 557 case 48000: 558 break; 559 } 560 561 snd_soc_component_write(component, WM8974_IFACE, iface); 562 snd_soc_component_write(component, WM8974_ADD, adn); 563 return 0; 564 } 565 566 static int wm8974_mute(struct snd_soc_dai *dai, int mute, int direction) 567 { 568 struct snd_soc_component *component = dai->component; 569 u16 mute_reg = snd_soc_component_read(component, WM8974_DAC) & 0xffbf; 570 571 if (mute) 572 snd_soc_component_write(component, WM8974_DAC, mute_reg | 0x40); 573 else 574 snd_soc_component_write(component, WM8974_DAC, mute_reg); 575 return 0; 576 } 577 578 /* liam need to make this lower power with dapm */ 579 static int wm8974_set_bias_level(struct snd_soc_component *component, 580 enum snd_soc_bias_level level) 581 { 582 u16 power1 = snd_soc_component_read(component, WM8974_POWER1) & ~0x3; 583 584 switch (level) { 585 case SND_SOC_BIAS_ON: 586 case SND_SOC_BIAS_PREPARE: 587 power1 |= 0x1; /* VMID 50k */ 588 snd_soc_component_write(component, WM8974_POWER1, power1); 589 break; 590 591 case SND_SOC_BIAS_STANDBY: 592 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN; 593 594 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { 595 regcache_sync(dev_get_regmap(component->dev, NULL)); 596 597 /* Initial cap charge at VMID 5k */ 598 snd_soc_component_write(component, WM8974_POWER1, power1 | 0x3); 599 mdelay(100); 600 } 601 602 power1 |= 0x2; /* VMID 500k */ 603 snd_soc_component_write(component, WM8974_POWER1, power1); 604 break; 605 606 case SND_SOC_BIAS_OFF: 607 snd_soc_component_write(component, WM8974_POWER1, 0); 608 snd_soc_component_write(component, WM8974_POWER2, 0); 609 snd_soc_component_write(component, WM8974_POWER3, 0); 610 break; 611 } 612 613 return 0; 614 } 615 616 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000) 617 618 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 619 SNDRV_PCM_FMTBIT_S24_LE) 620 621 static const struct snd_soc_dai_ops wm8974_ops = { 622 .hw_params = wm8974_pcm_hw_params, 623 .mute_stream = wm8974_mute, 624 .set_fmt = wm8974_set_dai_fmt, 625 .set_clkdiv = wm8974_set_dai_clkdiv, 626 .set_pll = wm8974_set_dai_pll, 627 .set_sysclk = wm8974_set_dai_sysclk, 628 .no_capture_mute = 1, 629 }; 630 631 static struct snd_soc_dai_driver wm8974_dai = { 632 .name = "wm8974-hifi", 633 .playback = { 634 .stream_name = "Playback", 635 .channels_min = 1, 636 .channels_max = 2, /* Only 1 channel of data */ 637 .rates = WM8974_RATES, 638 .formats = WM8974_FORMATS,}, 639 .capture = { 640 .stream_name = "Capture", 641 .channels_min = 1, 642 .channels_max = 2, /* Only 1 channel of data */ 643 .rates = WM8974_RATES, 644 .formats = WM8974_FORMATS,}, 645 .ops = &wm8974_ops, 646 .symmetric_rate = 1, 647 }; 648 649 static const struct regmap_config wm8974_regmap = { 650 .reg_bits = 7, 651 .val_bits = 9, 652 653 .max_register = WM8974_MONOMIX, 654 .reg_defaults = wm8974_reg_defaults, 655 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults), 656 .cache_type = REGCACHE_FLAT, 657 }; 658 659 static int wm8974_probe(struct snd_soc_component *component) 660 { 661 int ret = 0; 662 663 ret = wm8974_reset(component); 664 if (ret < 0) { 665 dev_err(component->dev, "Failed to issue reset\n"); 666 return ret; 667 } 668 669 return 0; 670 } 671 672 static const struct snd_soc_component_driver soc_component_dev_wm8974 = { 673 .probe = wm8974_probe, 674 .set_bias_level = wm8974_set_bias_level, 675 .controls = wm8974_snd_controls, 676 .num_controls = ARRAY_SIZE(wm8974_snd_controls), 677 .dapm_widgets = wm8974_dapm_widgets, 678 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets), 679 .dapm_routes = wm8974_dapm_routes, 680 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes), 681 .suspend_bias_off = 1, 682 .idle_bias_on = 1, 683 .use_pmdown_time = 1, 684 .endianness = 1, 685 }; 686 687 static int wm8974_i2c_probe(struct i2c_client *i2c) 688 { 689 struct wm8974_priv *priv; 690 struct regmap *regmap; 691 int ret; 692 693 priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL); 694 if (!priv) 695 return -ENOMEM; 696 697 i2c_set_clientdata(i2c, priv); 698 699 regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap); 700 if (IS_ERR(regmap)) 701 return PTR_ERR(regmap); 702 703 ret = devm_snd_soc_register_component(&i2c->dev, 704 &soc_component_dev_wm8974, &wm8974_dai, 1); 705 706 return ret; 707 } 708 709 static const struct i2c_device_id wm8974_i2c_id[] = { 710 { "wm8974", 0 }, 711 { } 712 }; 713 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id); 714 715 static const struct of_device_id wm8974_of_match[] = { 716 { .compatible = "wlf,wm8974", }, 717 { } 718 }; 719 MODULE_DEVICE_TABLE(of, wm8974_of_match); 720 721 static struct i2c_driver wm8974_i2c_driver = { 722 .driver = { 723 .name = "wm8974", 724 .of_match_table = wm8974_of_match, 725 }, 726 .probe_new = wm8974_i2c_probe, 727 .id_table = wm8974_i2c_id, 728 }; 729 730 module_i2c_driver(wm8974_i2c_driver); 731 732 MODULE_DESCRIPTION("ASoC WM8974 driver"); 733 MODULE_AUTHOR("Liam Girdwood"); 734 MODULE_LICENSE("GPL"); 735