1 /* 2 * Driver for the PCM512x CODECs 3 * 4 * Author: Mark Brown <broonie@kernel.org> 5 * Copyright 2014 Linaro Ltd 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 */ 16 17 18 #include <linux/init.h> 19 #include <linux/module.h> 20 #include <linux/clk.h> 21 #include <linux/kernel.h> 22 #include <linux/pm_runtime.h> 23 #include <linux/regmap.h> 24 #include <linux/regulator/consumer.h> 25 #include <linux/gcd.h> 26 #include <sound/soc.h> 27 #include <sound/soc-dapm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/tlv.h> 30 31 #include "pcm512x.h" 32 33 #define PCM512x_NUM_SUPPLIES 3 34 static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = { 35 "AVDD", 36 "DVDD", 37 "CPVDD", 38 }; 39 40 struct pcm512x_priv { 41 struct regmap *regmap; 42 struct clk *sclk; 43 struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES]; 44 struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES]; 45 int fmt; 46 int pll_in; 47 int pll_out; 48 int pll_r; 49 int pll_j; 50 int pll_d; 51 int pll_p; 52 unsigned long real_pll; 53 unsigned long overclock_pll; 54 unsigned long overclock_dac; 55 unsigned long overclock_dsp; 56 }; 57 58 /* 59 * We can't use the same notifier block for more than one supply and 60 * there's no way I can see to get from a callback to the caller 61 * except container_of(). 62 */ 63 #define PCM512x_REGULATOR_EVENT(n) \ 64 static int pcm512x_regulator_event_##n(struct notifier_block *nb, \ 65 unsigned long event, void *data) \ 66 { \ 67 struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \ 68 supply_nb[n]); \ 69 if (event & REGULATOR_EVENT_DISABLE) { \ 70 regcache_mark_dirty(pcm512x->regmap); \ 71 regcache_cache_only(pcm512x->regmap, true); \ 72 } \ 73 return 0; \ 74 } 75 76 PCM512x_REGULATOR_EVENT(0) 77 PCM512x_REGULATOR_EVENT(1) 78 PCM512x_REGULATOR_EVENT(2) 79 80 static const struct reg_default pcm512x_reg_defaults[] = { 81 { PCM512x_RESET, 0x00 }, 82 { PCM512x_POWER, 0x00 }, 83 { PCM512x_MUTE, 0x00 }, 84 { PCM512x_DSP, 0x00 }, 85 { PCM512x_PLL_REF, 0x00 }, 86 { PCM512x_DAC_REF, 0x00 }, 87 { PCM512x_DAC_ROUTING, 0x11 }, 88 { PCM512x_DSP_PROGRAM, 0x01 }, 89 { PCM512x_CLKDET, 0x00 }, 90 { PCM512x_AUTO_MUTE, 0x00 }, 91 { PCM512x_ERROR_DETECT, 0x00 }, 92 { PCM512x_DIGITAL_VOLUME_1, 0x00 }, 93 { PCM512x_DIGITAL_VOLUME_2, 0x30 }, 94 { PCM512x_DIGITAL_VOLUME_3, 0x30 }, 95 { PCM512x_DIGITAL_MUTE_1, 0x22 }, 96 { PCM512x_DIGITAL_MUTE_2, 0x00 }, 97 { PCM512x_DIGITAL_MUTE_3, 0x07 }, 98 { PCM512x_OUTPUT_AMPLITUDE, 0x00 }, 99 { PCM512x_ANALOG_GAIN_CTRL, 0x00 }, 100 { PCM512x_UNDERVOLTAGE_PROT, 0x00 }, 101 { PCM512x_ANALOG_MUTE_CTRL, 0x00 }, 102 { PCM512x_ANALOG_GAIN_BOOST, 0x00 }, 103 { PCM512x_VCOM_CTRL_1, 0x00 }, 104 { PCM512x_VCOM_CTRL_2, 0x01 }, 105 { PCM512x_BCLK_LRCLK_CFG, 0x00 }, 106 { PCM512x_MASTER_MODE, 0x7c }, 107 { PCM512x_GPIO_DACIN, 0x00 }, 108 { PCM512x_GPIO_PLLIN, 0x00 }, 109 { PCM512x_SYNCHRONIZE, 0x10 }, 110 { PCM512x_PLL_COEFF_0, 0x00 }, 111 { PCM512x_PLL_COEFF_1, 0x00 }, 112 { PCM512x_PLL_COEFF_2, 0x00 }, 113 { PCM512x_PLL_COEFF_3, 0x00 }, 114 { PCM512x_PLL_COEFF_4, 0x00 }, 115 { PCM512x_DSP_CLKDIV, 0x00 }, 116 { PCM512x_DAC_CLKDIV, 0x00 }, 117 { PCM512x_NCP_CLKDIV, 0x00 }, 118 { PCM512x_OSR_CLKDIV, 0x00 }, 119 { PCM512x_MASTER_CLKDIV_1, 0x00 }, 120 { PCM512x_MASTER_CLKDIV_2, 0x00 }, 121 { PCM512x_FS_SPEED_MODE, 0x00 }, 122 { PCM512x_IDAC_1, 0x01 }, 123 { PCM512x_IDAC_2, 0x00 }, 124 }; 125 126 static bool pcm512x_readable(struct device *dev, unsigned int reg) 127 { 128 switch (reg) { 129 case PCM512x_RESET: 130 case PCM512x_POWER: 131 case PCM512x_MUTE: 132 case PCM512x_PLL_EN: 133 case PCM512x_SPI_MISO_FUNCTION: 134 case PCM512x_DSP: 135 case PCM512x_GPIO_EN: 136 case PCM512x_BCLK_LRCLK_CFG: 137 case PCM512x_DSP_GPIO_INPUT: 138 case PCM512x_MASTER_MODE: 139 case PCM512x_PLL_REF: 140 case PCM512x_DAC_REF: 141 case PCM512x_GPIO_DACIN: 142 case PCM512x_GPIO_PLLIN: 143 case PCM512x_SYNCHRONIZE: 144 case PCM512x_PLL_COEFF_0: 145 case PCM512x_PLL_COEFF_1: 146 case PCM512x_PLL_COEFF_2: 147 case PCM512x_PLL_COEFF_3: 148 case PCM512x_PLL_COEFF_4: 149 case PCM512x_DSP_CLKDIV: 150 case PCM512x_DAC_CLKDIV: 151 case PCM512x_NCP_CLKDIV: 152 case PCM512x_OSR_CLKDIV: 153 case PCM512x_MASTER_CLKDIV_1: 154 case PCM512x_MASTER_CLKDIV_2: 155 case PCM512x_FS_SPEED_MODE: 156 case PCM512x_IDAC_1: 157 case PCM512x_IDAC_2: 158 case PCM512x_ERROR_DETECT: 159 case PCM512x_I2S_1: 160 case PCM512x_I2S_2: 161 case PCM512x_DAC_ROUTING: 162 case PCM512x_DSP_PROGRAM: 163 case PCM512x_CLKDET: 164 case PCM512x_AUTO_MUTE: 165 case PCM512x_DIGITAL_VOLUME_1: 166 case PCM512x_DIGITAL_VOLUME_2: 167 case PCM512x_DIGITAL_VOLUME_3: 168 case PCM512x_DIGITAL_MUTE_1: 169 case PCM512x_DIGITAL_MUTE_2: 170 case PCM512x_DIGITAL_MUTE_3: 171 case PCM512x_GPIO_OUTPUT_1: 172 case PCM512x_GPIO_OUTPUT_2: 173 case PCM512x_GPIO_OUTPUT_3: 174 case PCM512x_GPIO_OUTPUT_4: 175 case PCM512x_GPIO_OUTPUT_5: 176 case PCM512x_GPIO_OUTPUT_6: 177 case PCM512x_GPIO_CONTROL_1: 178 case PCM512x_GPIO_CONTROL_2: 179 case PCM512x_OVERFLOW: 180 case PCM512x_RATE_DET_1: 181 case PCM512x_RATE_DET_2: 182 case PCM512x_RATE_DET_3: 183 case PCM512x_RATE_DET_4: 184 case PCM512x_CLOCK_STATUS: 185 case PCM512x_ANALOG_MUTE_DET: 186 case PCM512x_GPIN: 187 case PCM512x_DIGITAL_MUTE_DET: 188 case PCM512x_OUTPUT_AMPLITUDE: 189 case PCM512x_ANALOG_GAIN_CTRL: 190 case PCM512x_UNDERVOLTAGE_PROT: 191 case PCM512x_ANALOG_MUTE_CTRL: 192 case PCM512x_ANALOG_GAIN_BOOST: 193 case PCM512x_VCOM_CTRL_1: 194 case PCM512x_VCOM_CTRL_2: 195 case PCM512x_CRAM_CTRL: 196 case PCM512x_FLEX_A: 197 case PCM512x_FLEX_B: 198 return true; 199 default: 200 /* There are 256 raw register addresses */ 201 return reg < 0xff; 202 } 203 } 204 205 static bool pcm512x_volatile(struct device *dev, unsigned int reg) 206 { 207 switch (reg) { 208 case PCM512x_PLL_EN: 209 case PCM512x_OVERFLOW: 210 case PCM512x_RATE_DET_1: 211 case PCM512x_RATE_DET_2: 212 case PCM512x_RATE_DET_3: 213 case PCM512x_RATE_DET_4: 214 case PCM512x_CLOCK_STATUS: 215 case PCM512x_ANALOG_MUTE_DET: 216 case PCM512x_GPIN: 217 case PCM512x_DIGITAL_MUTE_DET: 218 case PCM512x_CRAM_CTRL: 219 return true; 220 default: 221 /* There are 256 raw register addresses */ 222 return reg < 0xff; 223 } 224 } 225 226 static int pcm512x_overclock_pll_get(struct snd_kcontrol *kcontrol, 227 struct snd_ctl_elem_value *ucontrol) 228 { 229 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 230 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 231 232 ucontrol->value.integer.value[0] = pcm512x->overclock_pll; 233 return 0; 234 } 235 236 static int pcm512x_overclock_pll_put(struct snd_kcontrol *kcontrol, 237 struct snd_ctl_elem_value *ucontrol) 238 { 239 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 240 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 241 242 switch (snd_soc_codec_get_bias_level(codec)) { 243 case SND_SOC_BIAS_OFF: 244 case SND_SOC_BIAS_STANDBY: 245 break; 246 default: 247 return -EBUSY; 248 } 249 250 pcm512x->overclock_pll = ucontrol->value.integer.value[0]; 251 return 0; 252 } 253 254 static int pcm512x_overclock_dsp_get(struct snd_kcontrol *kcontrol, 255 struct snd_ctl_elem_value *ucontrol) 256 { 257 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 258 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 259 260 ucontrol->value.integer.value[0] = pcm512x->overclock_dsp; 261 return 0; 262 } 263 264 static int pcm512x_overclock_dsp_put(struct snd_kcontrol *kcontrol, 265 struct snd_ctl_elem_value *ucontrol) 266 { 267 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 268 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 269 270 switch (snd_soc_codec_get_bias_level(codec)) { 271 case SND_SOC_BIAS_OFF: 272 case SND_SOC_BIAS_STANDBY: 273 break; 274 default: 275 return -EBUSY; 276 } 277 278 pcm512x->overclock_dsp = ucontrol->value.integer.value[0]; 279 return 0; 280 } 281 282 static int pcm512x_overclock_dac_get(struct snd_kcontrol *kcontrol, 283 struct snd_ctl_elem_value *ucontrol) 284 { 285 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 286 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 287 288 ucontrol->value.integer.value[0] = pcm512x->overclock_dac; 289 return 0; 290 } 291 292 static int pcm512x_overclock_dac_put(struct snd_kcontrol *kcontrol, 293 struct snd_ctl_elem_value *ucontrol) 294 { 295 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 296 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 297 298 switch (snd_soc_codec_get_bias_level(codec)) { 299 case SND_SOC_BIAS_OFF: 300 case SND_SOC_BIAS_STANDBY: 301 break; 302 default: 303 return -EBUSY; 304 } 305 306 pcm512x->overclock_dac = ucontrol->value.integer.value[0]; 307 return 0; 308 } 309 310 static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1); 311 static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0); 312 static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0); 313 314 static const char * const pcm512x_dsp_program_texts[] = { 315 "FIR interpolation with de-emphasis", 316 "Low latency IIR with de-emphasis", 317 "High attenuation with de-emphasis", 318 "Fixed process flow", 319 "Ringing-less low latency FIR", 320 }; 321 322 static const unsigned int pcm512x_dsp_program_values[] = { 323 1, 324 2, 325 3, 326 5, 327 7, 328 }; 329 330 static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program, 331 PCM512x_DSP_PROGRAM, 0, 0x1f, 332 pcm512x_dsp_program_texts, 333 pcm512x_dsp_program_values); 334 335 static const char * const pcm512x_clk_missing_text[] = { 336 "1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s" 337 }; 338 339 static const struct soc_enum pcm512x_clk_missing = 340 SOC_ENUM_SINGLE(PCM512x_CLKDET, 0, 8, pcm512x_clk_missing_text); 341 342 static const char * const pcm512x_autom_text[] = { 343 "21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s" 344 }; 345 346 static const struct soc_enum pcm512x_autom_l = 347 SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8, 348 pcm512x_autom_text); 349 350 static const struct soc_enum pcm512x_autom_r = 351 SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8, 352 pcm512x_autom_text); 353 354 static const char * const pcm512x_ramp_rate_text[] = { 355 "1 sample/update", "2 samples/update", "4 samples/update", 356 "Immediate" 357 }; 358 359 static const struct soc_enum pcm512x_vndf = 360 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4, 361 pcm512x_ramp_rate_text); 362 363 static const struct soc_enum pcm512x_vnuf = 364 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4, 365 pcm512x_ramp_rate_text); 366 367 static const struct soc_enum pcm512x_vedf = 368 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4, 369 pcm512x_ramp_rate_text); 370 371 static const char * const pcm512x_ramp_step_text[] = { 372 "4dB/step", "2dB/step", "1dB/step", "0.5dB/step" 373 }; 374 375 static const struct soc_enum pcm512x_vnds = 376 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4, 377 pcm512x_ramp_step_text); 378 379 static const struct soc_enum pcm512x_vnus = 380 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4, 381 pcm512x_ramp_step_text); 382 383 static const struct soc_enum pcm512x_veds = 384 SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4, 385 pcm512x_ramp_step_text); 386 387 static const struct snd_kcontrol_new pcm512x_controls[] = { 388 SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2, 389 PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv), 390 SOC_DOUBLE_TLV("Analogue Playback Volume", PCM512x_ANALOG_GAIN_CTRL, 391 PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv), 392 SOC_DOUBLE_TLV("Analogue Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST, 393 PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv), 394 SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT, 395 PCM512x_RQMR_SHIFT, 1, 1), 396 397 SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1), 398 SOC_ENUM("DSP Program", pcm512x_dsp_program), 399 400 SOC_ENUM("Clock Missing Period", pcm512x_clk_missing), 401 SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l), 402 SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r), 403 SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3, 404 PCM512x_ACTL_SHIFT, 1, 0), 405 SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT, 406 PCM512x_AMRE_SHIFT, 1, 0), 407 408 SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf), 409 SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds), 410 SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf), 411 SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus), 412 SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf), 413 SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds), 414 415 SOC_SINGLE_EXT("Max Overclock PLL", SND_SOC_NOPM, 0, 20, 0, 416 pcm512x_overclock_pll_get, pcm512x_overclock_pll_put), 417 SOC_SINGLE_EXT("Max Overclock DSP", SND_SOC_NOPM, 0, 40, 0, 418 pcm512x_overclock_dsp_get, pcm512x_overclock_dsp_put), 419 SOC_SINGLE_EXT("Max Overclock DAC", SND_SOC_NOPM, 0, 40, 0, 420 pcm512x_overclock_dac_get, pcm512x_overclock_dac_put), 421 }; 422 423 static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = { 424 SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0), 425 SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0), 426 427 SND_SOC_DAPM_OUTPUT("OUTL"), 428 SND_SOC_DAPM_OUTPUT("OUTR"), 429 }; 430 431 static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = { 432 { "DACL", NULL, "Playback" }, 433 { "DACR", NULL, "Playback" }, 434 435 { "OUTL", NULL, "DACL" }, 436 { "OUTR", NULL, "DACR" }, 437 }; 438 439 static unsigned long pcm512x_pll_max(struct pcm512x_priv *pcm512x) 440 { 441 return 25000000 + 25000000 * pcm512x->overclock_pll / 100; 442 } 443 444 static unsigned long pcm512x_dsp_max(struct pcm512x_priv *pcm512x) 445 { 446 return 50000000 + 50000000 * pcm512x->overclock_dsp / 100; 447 } 448 449 static unsigned long pcm512x_dac_max(struct pcm512x_priv *pcm512x, 450 unsigned long rate) 451 { 452 return rate + rate * pcm512x->overclock_dac / 100; 453 } 454 455 static unsigned long pcm512x_sck_max(struct pcm512x_priv *pcm512x) 456 { 457 if (!pcm512x->pll_out) 458 return 25000000; 459 return pcm512x_pll_max(pcm512x); 460 } 461 462 static unsigned long pcm512x_ncp_target(struct pcm512x_priv *pcm512x, 463 unsigned long dac_rate) 464 { 465 /* 466 * If the DAC is not actually overclocked, use the good old 467 * NCP target rate... 468 */ 469 if (dac_rate <= 6144000) 470 return 1536000; 471 /* 472 * ...but if the DAC is in fact overclocked, bump the NCP target 473 * rate to get the recommended dividers even when overclocking. 474 */ 475 return pcm512x_dac_max(pcm512x, 1536000); 476 } 477 478 static const u32 pcm512x_dai_rates[] = { 479 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 480 88200, 96000, 176400, 192000, 384000, 481 }; 482 483 static const struct snd_pcm_hw_constraint_list constraints_slave = { 484 .count = ARRAY_SIZE(pcm512x_dai_rates), 485 .list = pcm512x_dai_rates, 486 }; 487 488 static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params, 489 struct snd_pcm_hw_rule *rule) 490 { 491 struct pcm512x_priv *pcm512x = rule->private; 492 struct snd_interval ranges[2]; 493 int frame_size; 494 495 frame_size = snd_soc_params_to_frame_size(params); 496 if (frame_size < 0) 497 return frame_size; 498 499 switch (frame_size) { 500 case 32: 501 /* No hole when the frame size is 32. */ 502 return 0; 503 case 48: 504 case 64: 505 /* There is only one hole in the range of supported 506 * rates, but it moves with the frame size. 507 */ 508 memset(ranges, 0, sizeof(ranges)); 509 ranges[0].min = 8000; 510 ranges[0].max = pcm512x_sck_max(pcm512x) / frame_size / 2; 511 ranges[1].min = DIV_ROUND_UP(16000000, frame_size); 512 ranges[1].max = 384000; 513 break; 514 default: 515 return -EINVAL; 516 } 517 518 return snd_interval_ranges(hw_param_interval(params, rule->var), 519 ARRAY_SIZE(ranges), ranges, 0); 520 } 521 522 static int pcm512x_dai_startup_master(struct snd_pcm_substream *substream, 523 struct snd_soc_dai *dai) 524 { 525 struct snd_soc_codec *codec = dai->codec; 526 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 527 struct device *dev = dai->dev; 528 struct snd_pcm_hw_constraint_ratnums *constraints_no_pll; 529 struct snd_ratnum *rats_no_pll; 530 531 if (IS_ERR(pcm512x->sclk)) { 532 dev_err(dev, "Need SCLK for master mode: %ld\n", 533 PTR_ERR(pcm512x->sclk)); 534 return PTR_ERR(pcm512x->sclk); 535 } 536 537 if (pcm512x->pll_out) 538 return snd_pcm_hw_rule_add(substream->runtime, 0, 539 SNDRV_PCM_HW_PARAM_RATE, 540 pcm512x_hw_rule_rate, 541 pcm512x, 542 SNDRV_PCM_HW_PARAM_FRAME_BITS, 543 SNDRV_PCM_HW_PARAM_CHANNELS, -1); 544 545 constraints_no_pll = devm_kzalloc(dev, sizeof(*constraints_no_pll), 546 GFP_KERNEL); 547 if (!constraints_no_pll) 548 return -ENOMEM; 549 constraints_no_pll->nrats = 1; 550 rats_no_pll = devm_kzalloc(dev, sizeof(*rats_no_pll), GFP_KERNEL); 551 if (!rats_no_pll) 552 return -ENOMEM; 553 constraints_no_pll->rats = rats_no_pll; 554 rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64; 555 rats_no_pll->den_min = 1; 556 rats_no_pll->den_max = 128; 557 rats_no_pll->den_step = 1; 558 559 return snd_pcm_hw_constraint_ratnums(substream->runtime, 0, 560 SNDRV_PCM_HW_PARAM_RATE, 561 constraints_no_pll); 562 } 563 564 static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream, 565 struct snd_soc_dai *dai) 566 { 567 struct snd_soc_codec *codec = dai->codec; 568 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 569 struct device *dev = dai->dev; 570 struct regmap *regmap = pcm512x->regmap; 571 572 if (IS_ERR(pcm512x->sclk)) { 573 dev_info(dev, "No SCLK, using BCLK: %ld\n", 574 PTR_ERR(pcm512x->sclk)); 575 576 /* Disable reporting of missing SCLK as an error */ 577 regmap_update_bits(regmap, PCM512x_ERROR_DETECT, 578 PCM512x_IDCH, PCM512x_IDCH); 579 580 /* Switch PLL input to BCLK */ 581 regmap_update_bits(regmap, PCM512x_PLL_REF, 582 PCM512x_SREF, PCM512x_SREF_BCK); 583 } 584 585 return snd_pcm_hw_constraint_list(substream->runtime, 0, 586 SNDRV_PCM_HW_PARAM_RATE, 587 &constraints_slave); 588 } 589 590 static int pcm512x_dai_startup(struct snd_pcm_substream *substream, 591 struct snd_soc_dai *dai) 592 { 593 struct snd_soc_codec *codec = dai->codec; 594 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 595 596 switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) { 597 case SND_SOC_DAIFMT_CBM_CFM: 598 case SND_SOC_DAIFMT_CBM_CFS: 599 return pcm512x_dai_startup_master(substream, dai); 600 601 case SND_SOC_DAIFMT_CBS_CFS: 602 return pcm512x_dai_startup_slave(substream, dai); 603 604 default: 605 return -EINVAL; 606 } 607 } 608 609 static int pcm512x_set_bias_level(struct snd_soc_codec *codec, 610 enum snd_soc_bias_level level) 611 { 612 struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev); 613 int ret; 614 615 switch (level) { 616 case SND_SOC_BIAS_ON: 617 case SND_SOC_BIAS_PREPARE: 618 break; 619 620 case SND_SOC_BIAS_STANDBY: 621 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, 622 PCM512x_RQST, 0); 623 if (ret != 0) { 624 dev_err(codec->dev, "Failed to remove standby: %d\n", 625 ret); 626 return ret; 627 } 628 break; 629 630 case SND_SOC_BIAS_OFF: 631 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, 632 PCM512x_RQST, PCM512x_RQST); 633 if (ret != 0) { 634 dev_err(codec->dev, "Failed to request standby: %d\n", 635 ret); 636 return ret; 637 } 638 break; 639 } 640 641 return 0; 642 } 643 644 static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai, 645 unsigned long bclk_rate) 646 { 647 struct device *dev = dai->dev; 648 struct snd_soc_codec *codec = dai->codec; 649 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 650 unsigned long sck_rate; 651 int pow2; 652 653 /* 64 MHz <= pll_rate <= 100 MHz, VREF mode */ 654 /* 16 MHz <= sck_rate <= 25 MHz, VREF mode */ 655 656 /* select sck_rate as a multiple of bclk_rate but still with 657 * as many factors of 2 as possible, as that makes it easier 658 * to find a fast DAC rate 659 */ 660 pow2 = 1 << fls((pcm512x_pll_max(pcm512x) - 16000000) / bclk_rate); 661 for (; pow2; pow2 >>= 1) { 662 sck_rate = rounddown(pcm512x_pll_max(pcm512x), 663 bclk_rate * pow2); 664 if (sck_rate >= 16000000) 665 break; 666 } 667 if (!pow2) { 668 dev_err(dev, "Impossible to generate a suitable SCK\n"); 669 return 0; 670 } 671 672 dev_dbg(dev, "sck_rate %lu\n", sck_rate); 673 return sck_rate; 674 } 675 676 /* pll_rate = pllin_rate * R * J.D / P 677 * 1 <= R <= 16 678 * 1 <= J <= 63 679 * 0 <= D <= 9999 680 * 1 <= P <= 15 681 * 64 MHz <= pll_rate <= 100 MHz 682 * if D == 0 683 * 1 MHz <= pllin_rate / P <= 20 MHz 684 * else if D > 0 685 * 6.667 MHz <= pllin_rate / P <= 20 MHz 686 * 4 <= J <= 11 687 * R = 1 688 */ 689 static int pcm512x_find_pll_coeff(struct snd_soc_dai *dai, 690 unsigned long pllin_rate, 691 unsigned long pll_rate) 692 { 693 struct device *dev = dai->dev; 694 struct snd_soc_codec *codec = dai->codec; 695 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 696 unsigned long common; 697 int R, J, D, P; 698 unsigned long K; /* 10000 * J.D */ 699 unsigned long num; 700 unsigned long den; 701 702 common = gcd(pll_rate, pllin_rate); 703 dev_dbg(dev, "pll %lu pllin %lu common %lu\n", 704 pll_rate, pllin_rate, common); 705 num = pll_rate / common; 706 den = pllin_rate / common; 707 708 /* pllin_rate / P (or here, den) cannot be greater than 20 MHz */ 709 if (pllin_rate / den > 20000000 && num < 8) { 710 num *= DIV_ROUND_UP(pllin_rate / den, 20000000); 711 den *= DIV_ROUND_UP(pllin_rate / den, 20000000); 712 } 713 dev_dbg(dev, "num / den = %lu / %lu\n", num, den); 714 715 P = den; 716 if (den <= 15 && num <= 16 * 63 717 && 1000000 <= pllin_rate / P && pllin_rate / P <= 20000000) { 718 /* Try the case with D = 0 */ 719 D = 0; 720 /* factor 'num' into J and R, such that R <= 16 and J <= 63 */ 721 for (R = 16; R; R--) { 722 if (num % R) 723 continue; 724 J = num / R; 725 if (J == 0 || J > 63) 726 continue; 727 728 dev_dbg(dev, "R * J / P = %d * %d / %d\n", R, J, P); 729 pcm512x->real_pll = pll_rate; 730 goto done; 731 } 732 /* no luck */ 733 } 734 735 R = 1; 736 737 if (num > 0xffffffffUL / 10000) 738 goto fallback; 739 740 /* Try to find an exact pll_rate using the D > 0 case */ 741 common = gcd(10000 * num, den); 742 num = 10000 * num / common; 743 den /= common; 744 dev_dbg(dev, "num %lu den %lu common %lu\n", num, den, common); 745 746 for (P = den; P <= 15; P++) { 747 if (pllin_rate / P < 6667000 || 200000000 < pllin_rate / P) 748 continue; 749 if (num * P % den) 750 continue; 751 K = num * P / den; 752 /* J == 12 is ok if D == 0 */ 753 if (K < 40000 || K > 120000) 754 continue; 755 756 J = K / 10000; 757 D = K % 10000; 758 dev_dbg(dev, "J.D / P = %d.%04d / %d\n", J, D, P); 759 pcm512x->real_pll = pll_rate; 760 goto done; 761 } 762 763 /* Fall back to an approximate pll_rate */ 764 765 fallback: 766 /* find smallest possible P */ 767 P = DIV_ROUND_UP(pllin_rate, 20000000); 768 if (!P) 769 P = 1; 770 else if (P > 15) { 771 dev_err(dev, "Need a slower clock as pll-input\n"); 772 return -EINVAL; 773 } 774 if (pllin_rate / P < 6667000) { 775 dev_err(dev, "Need a faster clock as pll-input\n"); 776 return -EINVAL; 777 } 778 K = DIV_ROUND_CLOSEST_ULL(10000ULL * pll_rate * P, pllin_rate); 779 if (K < 40000) 780 K = 40000; 781 /* J == 12 is ok if D == 0 */ 782 if (K > 120000) 783 K = 120000; 784 J = K / 10000; 785 D = K % 10000; 786 dev_dbg(dev, "J.D / P ~ %d.%04d / %d\n", J, D, P); 787 pcm512x->real_pll = DIV_ROUND_DOWN_ULL((u64)K * pllin_rate, 10000 * P); 788 789 done: 790 pcm512x->pll_r = R; 791 pcm512x->pll_j = J; 792 pcm512x->pll_d = D; 793 pcm512x->pll_p = P; 794 return 0; 795 } 796 797 static unsigned long pcm512x_pllin_dac_rate(struct snd_soc_dai *dai, 798 unsigned long osr_rate, 799 unsigned long pllin_rate) 800 { 801 struct snd_soc_codec *codec = dai->codec; 802 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 803 unsigned long dac_rate; 804 805 if (!pcm512x->pll_out) 806 return 0; /* no PLL to bypass, force SCK as DAC input */ 807 808 if (pllin_rate % osr_rate) 809 return 0; /* futile, quit early */ 810 811 /* run DAC no faster than 6144000 Hz */ 812 for (dac_rate = rounddown(pcm512x_dac_max(pcm512x, 6144000), osr_rate); 813 dac_rate; 814 dac_rate -= osr_rate) { 815 816 if (pllin_rate / dac_rate > 128) 817 return 0; /* DAC divider would be too big */ 818 819 if (!(pllin_rate % dac_rate)) 820 return dac_rate; 821 822 dac_rate -= osr_rate; 823 } 824 825 return 0; 826 } 827 828 static int pcm512x_set_dividers(struct snd_soc_dai *dai, 829 struct snd_pcm_hw_params *params) 830 { 831 struct device *dev = dai->dev; 832 struct snd_soc_codec *codec = dai->codec; 833 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 834 unsigned long pllin_rate = 0; 835 unsigned long pll_rate; 836 unsigned long sck_rate; 837 unsigned long mck_rate; 838 unsigned long bclk_rate; 839 unsigned long sample_rate; 840 unsigned long osr_rate; 841 unsigned long dacsrc_rate; 842 int bclk_div; 843 int lrclk_div; 844 int dsp_div; 845 int dac_div; 846 unsigned long dac_rate; 847 int ncp_div; 848 int osr_div; 849 int ret; 850 int idac; 851 int fssp; 852 int gpio; 853 854 lrclk_div = snd_soc_params_to_frame_size(params); 855 if (lrclk_div == 0) { 856 dev_err(dev, "No LRCLK?\n"); 857 return -EINVAL; 858 } 859 860 if (!pcm512x->pll_out) { 861 sck_rate = clk_get_rate(pcm512x->sclk); 862 bclk_div = params->rate_den * 64 / lrclk_div; 863 bclk_rate = DIV_ROUND_CLOSEST(sck_rate, bclk_div); 864 865 mck_rate = sck_rate; 866 } else { 867 ret = snd_soc_params_to_bclk(params); 868 if (ret < 0) { 869 dev_err(dev, "Failed to find suitable BCLK: %d\n", ret); 870 return ret; 871 } 872 if (ret == 0) { 873 dev_err(dev, "No BCLK?\n"); 874 return -EINVAL; 875 } 876 bclk_rate = ret; 877 878 pllin_rate = clk_get_rate(pcm512x->sclk); 879 880 sck_rate = pcm512x_find_sck(dai, bclk_rate); 881 if (!sck_rate) 882 return -EINVAL; 883 pll_rate = 4 * sck_rate; 884 885 ret = pcm512x_find_pll_coeff(dai, pllin_rate, pll_rate); 886 if (ret != 0) 887 return ret; 888 889 ret = regmap_write(pcm512x->regmap, 890 PCM512x_PLL_COEFF_0, pcm512x->pll_p - 1); 891 if (ret != 0) { 892 dev_err(dev, "Failed to write PLL P: %d\n", ret); 893 return ret; 894 } 895 896 ret = regmap_write(pcm512x->regmap, 897 PCM512x_PLL_COEFF_1, pcm512x->pll_j); 898 if (ret != 0) { 899 dev_err(dev, "Failed to write PLL J: %d\n", ret); 900 return ret; 901 } 902 903 ret = regmap_write(pcm512x->regmap, 904 PCM512x_PLL_COEFF_2, pcm512x->pll_d >> 8); 905 if (ret != 0) { 906 dev_err(dev, "Failed to write PLL D msb: %d\n", ret); 907 return ret; 908 } 909 910 ret = regmap_write(pcm512x->regmap, 911 PCM512x_PLL_COEFF_3, pcm512x->pll_d & 0xff); 912 if (ret != 0) { 913 dev_err(dev, "Failed to write PLL D lsb: %d\n", ret); 914 return ret; 915 } 916 917 ret = regmap_write(pcm512x->regmap, 918 PCM512x_PLL_COEFF_4, pcm512x->pll_r - 1); 919 if (ret != 0) { 920 dev_err(dev, "Failed to write PLL R: %d\n", ret); 921 return ret; 922 } 923 924 mck_rate = pcm512x->real_pll; 925 926 bclk_div = DIV_ROUND_CLOSEST(sck_rate, bclk_rate); 927 } 928 929 if (bclk_div > 128) { 930 dev_err(dev, "Failed to find BCLK divider\n"); 931 return -EINVAL; 932 } 933 934 /* the actual rate */ 935 sample_rate = sck_rate / bclk_div / lrclk_div; 936 osr_rate = 16 * sample_rate; 937 938 /* run DSP no faster than 50 MHz */ 939 dsp_div = mck_rate > pcm512x_dsp_max(pcm512x) ? 2 : 1; 940 941 dac_rate = pcm512x_pllin_dac_rate(dai, osr_rate, pllin_rate); 942 if (dac_rate) { 943 /* the desired clock rate is "compatible" with the pll input 944 * clock, so use that clock as dac input instead of the pll 945 * output clock since the pll will introduce jitter and thus 946 * noise. 947 */ 948 dev_dbg(dev, "using pll input as dac input\n"); 949 ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF, 950 PCM512x_SDAC, PCM512x_SDAC_GPIO); 951 if (ret != 0) { 952 dev_err(codec->dev, 953 "Failed to set gpio as dacref: %d\n", ret); 954 return ret; 955 } 956 957 gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1; 958 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_DACIN, 959 PCM512x_GREF, gpio); 960 if (ret != 0) { 961 dev_err(codec->dev, 962 "Failed to set gpio %d as dacin: %d\n", 963 pcm512x->pll_in, ret); 964 return ret; 965 } 966 967 dacsrc_rate = pllin_rate; 968 } else { 969 /* run DAC no faster than 6144000 Hz */ 970 unsigned long dac_mul = pcm512x_dac_max(pcm512x, 6144000) 971 / osr_rate; 972 unsigned long sck_mul = sck_rate / osr_rate; 973 974 for (; dac_mul; dac_mul--) { 975 if (!(sck_mul % dac_mul)) 976 break; 977 } 978 if (!dac_mul) { 979 dev_err(dev, "Failed to find DAC rate\n"); 980 return -EINVAL; 981 } 982 983 dac_rate = dac_mul * osr_rate; 984 dev_dbg(dev, "dac_rate %lu sample_rate %lu\n", 985 dac_rate, sample_rate); 986 987 ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF, 988 PCM512x_SDAC, PCM512x_SDAC_SCK); 989 if (ret != 0) { 990 dev_err(codec->dev, 991 "Failed to set sck as dacref: %d\n", ret); 992 return ret; 993 } 994 995 dacsrc_rate = sck_rate; 996 } 997 998 osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate); 999 if (osr_div > 128) { 1000 dev_err(dev, "Failed to find OSR divider\n"); 1001 return -EINVAL; 1002 } 1003 1004 dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate); 1005 if (dac_div > 128) { 1006 dev_err(dev, "Failed to find DAC divider\n"); 1007 return -EINVAL; 1008 } 1009 dac_rate = dacsrc_rate / dac_div; 1010 1011 ncp_div = DIV_ROUND_CLOSEST(dac_rate, 1012 pcm512x_ncp_target(pcm512x, dac_rate)); 1013 if (ncp_div > 128 || dac_rate / ncp_div > 2048000) { 1014 /* run NCP no faster than 2048000 Hz, but why? */ 1015 ncp_div = DIV_ROUND_UP(dac_rate, 2048000); 1016 if (ncp_div > 128) { 1017 dev_err(dev, "Failed to find NCP divider\n"); 1018 return -EINVAL; 1019 } 1020 } 1021 1022 idac = mck_rate / (dsp_div * sample_rate); 1023 1024 ret = regmap_write(pcm512x->regmap, PCM512x_DSP_CLKDIV, dsp_div - 1); 1025 if (ret != 0) { 1026 dev_err(dev, "Failed to write DSP divider: %d\n", ret); 1027 return ret; 1028 } 1029 1030 ret = regmap_write(pcm512x->regmap, PCM512x_DAC_CLKDIV, dac_div - 1); 1031 if (ret != 0) { 1032 dev_err(dev, "Failed to write DAC divider: %d\n", ret); 1033 return ret; 1034 } 1035 1036 ret = regmap_write(pcm512x->regmap, PCM512x_NCP_CLKDIV, ncp_div - 1); 1037 if (ret != 0) { 1038 dev_err(dev, "Failed to write NCP divider: %d\n", ret); 1039 return ret; 1040 } 1041 1042 ret = regmap_write(pcm512x->regmap, PCM512x_OSR_CLKDIV, osr_div - 1); 1043 if (ret != 0) { 1044 dev_err(dev, "Failed to write OSR divider: %d\n", ret); 1045 return ret; 1046 } 1047 1048 ret = regmap_write(pcm512x->regmap, 1049 PCM512x_MASTER_CLKDIV_1, bclk_div - 1); 1050 if (ret != 0) { 1051 dev_err(dev, "Failed to write BCLK divider: %d\n", ret); 1052 return ret; 1053 } 1054 1055 ret = regmap_write(pcm512x->regmap, 1056 PCM512x_MASTER_CLKDIV_2, lrclk_div - 1); 1057 if (ret != 0) { 1058 dev_err(dev, "Failed to write LRCLK divider: %d\n", ret); 1059 return ret; 1060 } 1061 1062 ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_1, idac >> 8); 1063 if (ret != 0) { 1064 dev_err(dev, "Failed to write IDAC msb divider: %d\n", ret); 1065 return ret; 1066 } 1067 1068 ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_2, idac & 0xff); 1069 if (ret != 0) { 1070 dev_err(dev, "Failed to write IDAC lsb divider: %d\n", ret); 1071 return ret; 1072 } 1073 1074 if (sample_rate <= pcm512x_dac_max(pcm512x, 48000)) 1075 fssp = PCM512x_FSSP_48KHZ; 1076 else if (sample_rate <= pcm512x_dac_max(pcm512x, 96000)) 1077 fssp = PCM512x_FSSP_96KHZ; 1078 else if (sample_rate <= pcm512x_dac_max(pcm512x, 192000)) 1079 fssp = PCM512x_FSSP_192KHZ; 1080 else 1081 fssp = PCM512x_FSSP_384KHZ; 1082 ret = regmap_update_bits(pcm512x->regmap, PCM512x_FS_SPEED_MODE, 1083 PCM512x_FSSP, fssp); 1084 if (ret != 0) { 1085 dev_err(codec->dev, "Failed to set fs speed: %d\n", ret); 1086 return ret; 1087 } 1088 1089 dev_dbg(codec->dev, "DSP divider %d\n", dsp_div); 1090 dev_dbg(codec->dev, "DAC divider %d\n", dac_div); 1091 dev_dbg(codec->dev, "NCP divider %d\n", ncp_div); 1092 dev_dbg(codec->dev, "OSR divider %d\n", osr_div); 1093 dev_dbg(codec->dev, "BCK divider %d\n", bclk_div); 1094 dev_dbg(codec->dev, "LRCK divider %d\n", lrclk_div); 1095 dev_dbg(codec->dev, "IDAC %d\n", idac); 1096 dev_dbg(codec->dev, "1<<FSSP %d\n", 1 << fssp); 1097 1098 return 0; 1099 } 1100 1101 static int pcm512x_hw_params(struct snd_pcm_substream *substream, 1102 struct snd_pcm_hw_params *params, 1103 struct snd_soc_dai *dai) 1104 { 1105 struct snd_soc_codec *codec = dai->codec; 1106 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 1107 int alen; 1108 int gpio; 1109 int clock_output; 1110 int master_mode; 1111 int ret; 1112 1113 dev_dbg(codec->dev, "hw_params %u Hz, %u channels\n", 1114 params_rate(params), 1115 params_channels(params)); 1116 1117 switch (params_width(params)) { 1118 case 16: 1119 alen = PCM512x_ALEN_16; 1120 break; 1121 case 20: 1122 alen = PCM512x_ALEN_20; 1123 break; 1124 case 24: 1125 alen = PCM512x_ALEN_24; 1126 break; 1127 case 32: 1128 alen = PCM512x_ALEN_32; 1129 break; 1130 default: 1131 dev_err(codec->dev, "Bad frame size: %d\n", 1132 params_width(params)); 1133 return -EINVAL; 1134 } 1135 1136 switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) { 1137 case SND_SOC_DAIFMT_CBS_CFS: 1138 ret = regmap_update_bits(pcm512x->regmap, 1139 PCM512x_BCLK_LRCLK_CFG, 1140 PCM512x_BCKP 1141 | PCM512x_BCKO | PCM512x_LRKO, 1142 0); 1143 if (ret != 0) { 1144 dev_err(codec->dev, 1145 "Failed to enable slave mode: %d\n", ret); 1146 return ret; 1147 } 1148 1149 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, 1150 PCM512x_DCAS, 0); 1151 if (ret != 0) { 1152 dev_err(codec->dev, 1153 "Failed to enable clock divider autoset: %d\n", 1154 ret); 1155 return ret; 1156 } 1157 return 0; 1158 case SND_SOC_DAIFMT_CBM_CFM: 1159 clock_output = PCM512x_BCKO | PCM512x_LRKO; 1160 master_mode = PCM512x_RLRK | PCM512x_RBCK; 1161 break; 1162 case SND_SOC_DAIFMT_CBM_CFS: 1163 clock_output = PCM512x_BCKO; 1164 master_mode = PCM512x_RBCK; 1165 break; 1166 default: 1167 return -EINVAL; 1168 } 1169 1170 ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1, 1171 PCM512x_ALEN, alen); 1172 if (ret != 0) { 1173 dev_err(codec->dev, "Failed to set frame size: %d\n", ret); 1174 return ret; 1175 } 1176 1177 if (pcm512x->pll_out) { 1178 ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11); 1179 if (ret != 0) { 1180 dev_err(codec->dev, "Failed to set FLEX_A: %d\n", ret); 1181 return ret; 1182 } 1183 1184 ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_B, 0xff); 1185 if (ret != 0) { 1186 dev_err(codec->dev, "Failed to set FLEX_B: %d\n", ret); 1187 return ret; 1188 } 1189 1190 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, 1191 PCM512x_IDFS | PCM512x_IDBK 1192 | PCM512x_IDSK | PCM512x_IDCH 1193 | PCM512x_IDCM | PCM512x_DCAS 1194 | PCM512x_IPLK, 1195 PCM512x_IDFS | PCM512x_IDBK 1196 | PCM512x_IDSK | PCM512x_IDCH 1197 | PCM512x_DCAS); 1198 if (ret != 0) { 1199 dev_err(codec->dev, 1200 "Failed to ignore auto-clock failures: %d\n", 1201 ret); 1202 return ret; 1203 } 1204 } else { 1205 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT, 1206 PCM512x_IDFS | PCM512x_IDBK 1207 | PCM512x_IDSK | PCM512x_IDCH 1208 | PCM512x_IDCM | PCM512x_DCAS 1209 | PCM512x_IPLK, 1210 PCM512x_IDFS | PCM512x_IDBK 1211 | PCM512x_IDSK | PCM512x_IDCH 1212 | PCM512x_DCAS | PCM512x_IPLK); 1213 if (ret != 0) { 1214 dev_err(codec->dev, 1215 "Failed to ignore auto-clock failures: %d\n", 1216 ret); 1217 return ret; 1218 } 1219 1220 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN, 1221 PCM512x_PLLE, 0); 1222 if (ret != 0) { 1223 dev_err(codec->dev, "Failed to disable pll: %d\n", ret); 1224 return ret; 1225 } 1226 } 1227 1228 ret = pcm512x_set_dividers(dai, params); 1229 if (ret != 0) 1230 return ret; 1231 1232 if (pcm512x->pll_out) { 1233 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_REF, 1234 PCM512x_SREF, PCM512x_SREF_GPIO); 1235 if (ret != 0) { 1236 dev_err(codec->dev, 1237 "Failed to set gpio as pllref: %d\n", ret); 1238 return ret; 1239 } 1240 1241 gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1; 1242 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_PLLIN, 1243 PCM512x_GREF, gpio); 1244 if (ret != 0) { 1245 dev_err(codec->dev, 1246 "Failed to set gpio %d as pllin: %d\n", 1247 pcm512x->pll_in, ret); 1248 return ret; 1249 } 1250 1251 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN, 1252 PCM512x_PLLE, PCM512x_PLLE); 1253 if (ret != 0) { 1254 dev_err(codec->dev, "Failed to enable pll: %d\n", ret); 1255 return ret; 1256 } 1257 } 1258 1259 ret = regmap_update_bits(pcm512x->regmap, PCM512x_BCLK_LRCLK_CFG, 1260 PCM512x_BCKP | PCM512x_BCKO | PCM512x_LRKO, 1261 clock_output); 1262 if (ret != 0) { 1263 dev_err(codec->dev, "Failed to enable clock output: %d\n", ret); 1264 return ret; 1265 } 1266 1267 ret = regmap_update_bits(pcm512x->regmap, PCM512x_MASTER_MODE, 1268 PCM512x_RLRK | PCM512x_RBCK, 1269 master_mode); 1270 if (ret != 0) { 1271 dev_err(codec->dev, "Failed to enable master mode: %d\n", ret); 1272 return ret; 1273 } 1274 1275 if (pcm512x->pll_out) { 1276 gpio = PCM512x_G1OE << (pcm512x->pll_out - 1); 1277 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_EN, 1278 gpio, gpio); 1279 if (ret != 0) { 1280 dev_err(codec->dev, "Failed to enable gpio %d: %d\n", 1281 pcm512x->pll_out, ret); 1282 return ret; 1283 } 1284 1285 gpio = PCM512x_GPIO_OUTPUT_1 + pcm512x->pll_out - 1; 1286 ret = regmap_update_bits(pcm512x->regmap, gpio, 1287 PCM512x_GxSL, PCM512x_GxSL_PLLCK); 1288 if (ret != 0) { 1289 dev_err(codec->dev, "Failed to output pll on %d: %d\n", 1290 ret, pcm512x->pll_out); 1291 return ret; 1292 } 1293 } 1294 1295 ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE, 1296 PCM512x_RQSY, PCM512x_RQSY_HALT); 1297 if (ret != 0) { 1298 dev_err(codec->dev, "Failed to halt clocks: %d\n", ret); 1299 return ret; 1300 } 1301 1302 ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE, 1303 PCM512x_RQSY, PCM512x_RQSY_RESUME); 1304 if (ret != 0) { 1305 dev_err(codec->dev, "Failed to resume clocks: %d\n", ret); 1306 return ret; 1307 } 1308 1309 return 0; 1310 } 1311 1312 static int pcm512x_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 1313 { 1314 struct snd_soc_codec *codec = dai->codec; 1315 struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec); 1316 1317 pcm512x->fmt = fmt; 1318 1319 return 0; 1320 } 1321 1322 static const struct snd_soc_dai_ops pcm512x_dai_ops = { 1323 .startup = pcm512x_dai_startup, 1324 .hw_params = pcm512x_hw_params, 1325 .set_fmt = pcm512x_set_fmt, 1326 }; 1327 1328 static struct snd_soc_dai_driver pcm512x_dai = { 1329 .name = "pcm512x-hifi", 1330 .playback = { 1331 .stream_name = "Playback", 1332 .channels_min = 2, 1333 .channels_max = 2, 1334 .rates = SNDRV_PCM_RATE_CONTINUOUS, 1335 .rate_min = 8000, 1336 .rate_max = 384000, 1337 .formats = SNDRV_PCM_FMTBIT_S16_LE | 1338 SNDRV_PCM_FMTBIT_S24_LE | 1339 SNDRV_PCM_FMTBIT_S32_LE 1340 }, 1341 .ops = &pcm512x_dai_ops, 1342 }; 1343 1344 static const struct snd_soc_codec_driver pcm512x_codec_driver = { 1345 .set_bias_level = pcm512x_set_bias_level, 1346 .idle_bias_off = true, 1347 1348 .component_driver = { 1349 .controls = pcm512x_controls, 1350 .num_controls = ARRAY_SIZE(pcm512x_controls), 1351 .dapm_widgets = pcm512x_dapm_widgets, 1352 .num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets), 1353 .dapm_routes = pcm512x_dapm_routes, 1354 .num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes), 1355 }, 1356 }; 1357 1358 static const struct regmap_range_cfg pcm512x_range = { 1359 .name = "Pages", .range_min = PCM512x_VIRT_BASE, 1360 .range_max = PCM512x_MAX_REGISTER, 1361 .selector_reg = PCM512x_PAGE, 1362 .selector_mask = 0xff, 1363 .window_start = 0, .window_len = 0x100, 1364 }; 1365 1366 const struct regmap_config pcm512x_regmap = { 1367 .reg_bits = 8, 1368 .val_bits = 8, 1369 1370 .readable_reg = pcm512x_readable, 1371 .volatile_reg = pcm512x_volatile, 1372 1373 .ranges = &pcm512x_range, 1374 .num_ranges = 1, 1375 1376 .max_register = PCM512x_MAX_REGISTER, 1377 .reg_defaults = pcm512x_reg_defaults, 1378 .num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults), 1379 .cache_type = REGCACHE_RBTREE, 1380 }; 1381 EXPORT_SYMBOL_GPL(pcm512x_regmap); 1382 1383 int pcm512x_probe(struct device *dev, struct regmap *regmap) 1384 { 1385 struct pcm512x_priv *pcm512x; 1386 int i, ret; 1387 1388 pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL); 1389 if (!pcm512x) 1390 return -ENOMEM; 1391 1392 dev_set_drvdata(dev, pcm512x); 1393 pcm512x->regmap = regmap; 1394 1395 for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) 1396 pcm512x->supplies[i].supply = pcm512x_supply_names[i]; 1397 1398 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies), 1399 pcm512x->supplies); 1400 if (ret != 0) { 1401 dev_err(dev, "Failed to get supplies: %d\n", ret); 1402 return ret; 1403 } 1404 1405 pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0; 1406 pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1; 1407 pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2; 1408 1409 for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) { 1410 ret = regulator_register_notifier(pcm512x->supplies[i].consumer, 1411 &pcm512x->supply_nb[i]); 1412 if (ret != 0) { 1413 dev_err(dev, 1414 "Failed to register regulator notifier: %d\n", 1415 ret); 1416 } 1417 } 1418 1419 ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies), 1420 pcm512x->supplies); 1421 if (ret != 0) { 1422 dev_err(dev, "Failed to enable supplies: %d\n", ret); 1423 return ret; 1424 } 1425 1426 /* Reset the device, verifying I/O in the process for I2C */ 1427 ret = regmap_write(regmap, PCM512x_RESET, 1428 PCM512x_RSTM | PCM512x_RSTR); 1429 if (ret != 0) { 1430 dev_err(dev, "Failed to reset device: %d\n", ret); 1431 goto err; 1432 } 1433 1434 ret = regmap_write(regmap, PCM512x_RESET, 0); 1435 if (ret != 0) { 1436 dev_err(dev, "Failed to reset device: %d\n", ret); 1437 goto err; 1438 } 1439 1440 pcm512x->sclk = devm_clk_get(dev, NULL); 1441 if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER) 1442 return -EPROBE_DEFER; 1443 if (!IS_ERR(pcm512x->sclk)) { 1444 ret = clk_prepare_enable(pcm512x->sclk); 1445 if (ret != 0) { 1446 dev_err(dev, "Failed to enable SCLK: %d\n", ret); 1447 return ret; 1448 } 1449 } 1450 1451 /* Default to standby mode */ 1452 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, 1453 PCM512x_RQST, PCM512x_RQST); 1454 if (ret != 0) { 1455 dev_err(dev, "Failed to request standby: %d\n", 1456 ret); 1457 goto err_clk; 1458 } 1459 1460 pm_runtime_set_active(dev); 1461 pm_runtime_enable(dev); 1462 pm_runtime_idle(dev); 1463 1464 #ifdef CONFIG_OF 1465 if (dev->of_node) { 1466 const struct device_node *np = dev->of_node; 1467 u32 val; 1468 1469 if (of_property_read_u32(np, "pll-in", &val) >= 0) { 1470 if (val > 6) { 1471 dev_err(dev, "Invalid pll-in\n"); 1472 ret = -EINVAL; 1473 goto err_clk; 1474 } 1475 pcm512x->pll_in = val; 1476 } 1477 1478 if (of_property_read_u32(np, "pll-out", &val) >= 0) { 1479 if (val > 6) { 1480 dev_err(dev, "Invalid pll-out\n"); 1481 ret = -EINVAL; 1482 goto err_clk; 1483 } 1484 pcm512x->pll_out = val; 1485 } 1486 1487 if (!pcm512x->pll_in != !pcm512x->pll_out) { 1488 dev_err(dev, 1489 "Error: both pll-in and pll-out, or none\n"); 1490 ret = -EINVAL; 1491 goto err_clk; 1492 } 1493 if (pcm512x->pll_in && pcm512x->pll_in == pcm512x->pll_out) { 1494 dev_err(dev, "Error: pll-in == pll-out\n"); 1495 ret = -EINVAL; 1496 goto err_clk; 1497 } 1498 } 1499 #endif 1500 1501 ret = snd_soc_register_codec(dev, &pcm512x_codec_driver, 1502 &pcm512x_dai, 1); 1503 if (ret != 0) { 1504 dev_err(dev, "Failed to register CODEC: %d\n", ret); 1505 goto err_pm; 1506 } 1507 1508 return 0; 1509 1510 err_pm: 1511 pm_runtime_disable(dev); 1512 err_clk: 1513 if (!IS_ERR(pcm512x->sclk)) 1514 clk_disable_unprepare(pcm512x->sclk); 1515 err: 1516 regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), 1517 pcm512x->supplies); 1518 return ret; 1519 } 1520 EXPORT_SYMBOL_GPL(pcm512x_probe); 1521 1522 void pcm512x_remove(struct device *dev) 1523 { 1524 struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); 1525 1526 snd_soc_unregister_codec(dev); 1527 pm_runtime_disable(dev); 1528 if (!IS_ERR(pcm512x->sclk)) 1529 clk_disable_unprepare(pcm512x->sclk); 1530 regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), 1531 pcm512x->supplies); 1532 } 1533 EXPORT_SYMBOL_GPL(pcm512x_remove); 1534 1535 #ifdef CONFIG_PM 1536 static int pcm512x_suspend(struct device *dev) 1537 { 1538 struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); 1539 int ret; 1540 1541 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, 1542 PCM512x_RQPD, PCM512x_RQPD); 1543 if (ret != 0) { 1544 dev_err(dev, "Failed to request power down: %d\n", ret); 1545 return ret; 1546 } 1547 1548 ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies), 1549 pcm512x->supplies); 1550 if (ret != 0) { 1551 dev_err(dev, "Failed to disable supplies: %d\n", ret); 1552 return ret; 1553 } 1554 1555 if (!IS_ERR(pcm512x->sclk)) 1556 clk_disable_unprepare(pcm512x->sclk); 1557 1558 return 0; 1559 } 1560 1561 static int pcm512x_resume(struct device *dev) 1562 { 1563 struct pcm512x_priv *pcm512x = dev_get_drvdata(dev); 1564 int ret; 1565 1566 if (!IS_ERR(pcm512x->sclk)) { 1567 ret = clk_prepare_enable(pcm512x->sclk); 1568 if (ret != 0) { 1569 dev_err(dev, "Failed to enable SCLK: %d\n", ret); 1570 return ret; 1571 } 1572 } 1573 1574 ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies), 1575 pcm512x->supplies); 1576 if (ret != 0) { 1577 dev_err(dev, "Failed to enable supplies: %d\n", ret); 1578 return ret; 1579 } 1580 1581 regcache_cache_only(pcm512x->regmap, false); 1582 ret = regcache_sync(pcm512x->regmap); 1583 if (ret != 0) { 1584 dev_err(dev, "Failed to sync cache: %d\n", ret); 1585 return ret; 1586 } 1587 1588 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER, 1589 PCM512x_RQPD, 0); 1590 if (ret != 0) { 1591 dev_err(dev, "Failed to remove power down: %d\n", ret); 1592 return ret; 1593 } 1594 1595 return 0; 1596 } 1597 #endif 1598 1599 const struct dev_pm_ops pcm512x_pm_ops = { 1600 SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL) 1601 }; 1602 EXPORT_SYMBOL_GPL(pcm512x_pm_ops); 1603 1604 MODULE_DESCRIPTION("ASoC PCM512x codec driver"); 1605 MODULE_AUTHOR("Mark Brown <broonie@kernel.org>"); 1606 MODULE_LICENSE("GPL v2"); 1607