kernel/sound/soc/codecs/pcm512x.c

   1 /*
   2  * Driver for the PCM512x CODECs
   3  *
   4  * Author:      Mark Brown <broonie@linaro.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 DIV_ROUND_DOWN_ULL(ll, d) \
  34         ({ unsigned long long _tmp = (ll); do_div(_tmp, d); _tmp; })
  35
  36 #define PCM512x_NUM_SUPPLIES 3
  37 static const char * const pcm512x_supply_names[PCM512x_NUM_SUPPLIES] = {
  38         "AVDD",
  39         "DVDD",
  40         "CPVDD",
  41 };
  42
  43 struct pcm512x_priv {
  44         struct regmap *regmap;
  45         struct clk *sclk;
  46         struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
  47         struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
  48         int fmt;
  49         int pll_in;
  50         int pll_out;
  51         int pll_r;
  52         int pll_j;
  53         int pll_d;
  54         int pll_p;
  55         unsigned long real_pll;
  56         unsigned long overclock_pll;
  57         unsigned long overclock_dac;
  58         unsigned long overclock_dsp;
  59 };
  60
  61 /*
  62  * We can't use the same notifier block for more than one supply and
  63  * there's no way I can see to get from a callback to the caller
  64  * except container_of().
  65  */
  66 #define PCM512x_REGULATOR_EVENT(n) \
  67 static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
  68                                       unsigned long event, void *data)    \
  69 { \
  70         struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
  71                                                     supply_nb[n]); \
  72         if (event & REGULATOR_EVENT_DISABLE) { \
  73                 regcache_mark_dirty(pcm512x->regmap);   \
  74                 regcache_cache_only(pcm512x->regmap, true);     \
  75         } \
  76         return 0; \
  77 }
  78
  79 PCM512x_REGULATOR_EVENT(0)
  80 PCM512x_REGULATOR_EVENT(1)
  81 PCM512x_REGULATOR_EVENT(2)
  82
  83 static const struct reg_default pcm512x_reg_defaults[] = {
  84         { PCM512x_RESET,             0x00 },
  85         { PCM512x_POWER,             0x00 },
  86         { PCM512x_MUTE,              0x00 },
  87         { PCM512x_DSP,               0x00 },
  88         { PCM512x_PLL_REF,           0x00 },
  89         { PCM512x_DAC_REF,           0x00 },
  90         { PCM512x_DAC_ROUTING,       0x11 },
  91         { PCM512x_DSP_PROGRAM,       0x01 },
  92         { PCM512x_CLKDET,            0x00 },
  93         { PCM512x_AUTO_MUTE,         0x00 },
  94         { PCM512x_ERROR_DETECT,      0x00 },
  95         { PCM512x_DIGITAL_VOLUME_1,  0x00 },
  96         { PCM512x_DIGITAL_VOLUME_2,  0x30 },
  97         { PCM512x_DIGITAL_VOLUME_3,  0x30 },
  98         { PCM512x_DIGITAL_MUTE_1,    0x22 },
  99         { PCM512x_DIGITAL_MUTE_2,    0x00 },
 100         { PCM512x_DIGITAL_MUTE_3,    0x07 },
 101         { PCM512x_OUTPUT_AMPLITUDE,  0x00 },
 102         { PCM512x_ANALOG_GAIN_CTRL,  0x00 },
 103         { PCM512x_UNDERVOLTAGE_PROT, 0x00 },
 104         { PCM512x_ANALOG_MUTE_CTRL,  0x00 },
 105         { PCM512x_ANALOG_GAIN_BOOST, 0x00 },
 106         { PCM512x_VCOM_CTRL_1,       0x00 },
 107         { PCM512x_VCOM_CTRL_2,       0x01 },
 108         { PCM512x_BCLK_LRCLK_CFG,    0x00 },
 109         { PCM512x_MASTER_MODE,       0x7c },
 110         { PCM512x_GPIO_DACIN,        0x00 },
 111         { PCM512x_GPIO_PLLIN,        0x00 },
 112         { PCM512x_SYNCHRONIZE,       0x10 },
 113         { PCM512x_PLL_COEFF_0,       0x00 },
 114         { PCM512x_PLL_COEFF_1,       0x00 },
 115         { PCM512x_PLL_COEFF_2,       0x00 },
 116         { PCM512x_PLL_COEFF_3,       0x00 },
 117         { PCM512x_PLL_COEFF_4,       0x00 },
 118         { PCM512x_DSP_CLKDIV,        0x00 },
 119         { PCM512x_DAC_CLKDIV,        0x00 },
 120         { PCM512x_NCP_CLKDIV,        0x00 },
 121         { PCM512x_OSR_CLKDIV,        0x00 },
 122         { PCM512x_MASTER_CLKDIV_1,   0x00 },
 123         { PCM512x_MASTER_CLKDIV_2,   0x00 },
 124         { PCM512x_FS_SPEED_MODE,     0x00 },
 125         { PCM512x_IDAC_1,            0x01 },
 126         { PCM512x_IDAC_2,            0x00 },
 127 };
 128
 129 static bool pcm512x_readable(struct device *dev, unsigned int reg)
 130 {
 131         switch (reg) {
 132         case PCM512x_RESET:
 133         case PCM512x_POWER:
 134         case PCM512x_MUTE:
 135         case PCM512x_PLL_EN:
 136         case PCM512x_SPI_MISO_FUNCTION:
 137         case PCM512x_DSP:
 138         case PCM512x_GPIO_EN:
 139         case PCM512x_BCLK_LRCLK_CFG:
 140         case PCM512x_DSP_GPIO_INPUT:
 141         case PCM512x_MASTER_MODE:
 142         case PCM512x_PLL_REF:
 143         case PCM512x_DAC_REF:
 144         case PCM512x_GPIO_DACIN:
 145         case PCM512x_GPIO_PLLIN:
 146         case PCM512x_SYNCHRONIZE:
 147         case PCM512x_PLL_COEFF_0:
 148         case PCM512x_PLL_COEFF_1:
 149         case PCM512x_PLL_COEFF_2:
 150         case PCM512x_PLL_COEFF_3:
 151         case PCM512x_PLL_COEFF_4:
 152         case PCM512x_DSP_CLKDIV:
 153         case PCM512x_DAC_CLKDIV:
 154         case PCM512x_NCP_CLKDIV:
 155         case PCM512x_OSR_CLKDIV:
 156         case PCM512x_MASTER_CLKDIV_1:
 157         case PCM512x_MASTER_CLKDIV_2:
 158         case PCM512x_FS_SPEED_MODE:
 159         case PCM512x_IDAC_1:
 160         case PCM512x_IDAC_2:
 161         case PCM512x_ERROR_DETECT:
 162         case PCM512x_I2S_1:
 163         case PCM512x_I2S_2:
 164         case PCM512x_DAC_ROUTING:
 165         case PCM512x_DSP_PROGRAM:
 166         case PCM512x_CLKDET:
 167         case PCM512x_AUTO_MUTE:
 168         case PCM512x_DIGITAL_VOLUME_1:
 169         case PCM512x_DIGITAL_VOLUME_2:
 170         case PCM512x_DIGITAL_VOLUME_3:
 171         case PCM512x_DIGITAL_MUTE_1:
 172         case PCM512x_DIGITAL_MUTE_2:
 173         case PCM512x_DIGITAL_MUTE_3:
 174         case PCM512x_GPIO_OUTPUT_1:
 175         case PCM512x_GPIO_OUTPUT_2:
 176         case PCM512x_GPIO_OUTPUT_3:
 177         case PCM512x_GPIO_OUTPUT_4:
 178         case PCM512x_GPIO_OUTPUT_5:
 179         case PCM512x_GPIO_OUTPUT_6:
 180         case PCM512x_GPIO_CONTROL_1:
 181         case PCM512x_GPIO_CONTROL_2:
 182         case PCM512x_OVERFLOW:
 183         case PCM512x_RATE_DET_1:
 184         case PCM512x_RATE_DET_2:
 185         case PCM512x_RATE_DET_3:
 186         case PCM512x_RATE_DET_4:
 187         case PCM512x_CLOCK_STATUS:
 188         case PCM512x_ANALOG_MUTE_DET:
 189         case PCM512x_GPIN:
 190         case PCM512x_DIGITAL_MUTE_DET:
 191         case PCM512x_OUTPUT_AMPLITUDE:
 192         case PCM512x_ANALOG_GAIN_CTRL:
 193         case PCM512x_UNDERVOLTAGE_PROT:
 194         case PCM512x_ANALOG_MUTE_CTRL:
 195         case PCM512x_ANALOG_GAIN_BOOST:
 196         case PCM512x_VCOM_CTRL_1:
 197         case PCM512x_VCOM_CTRL_2:
 198         case PCM512x_CRAM_CTRL:
 199         case PCM512x_FLEX_A:
 200         case PCM512x_FLEX_B:
 201                 return true;
 202         default:
 203                 /* There are 256 raw register addresses */
 204                 return reg < 0xff;
 205         }
 206 }
 207
 208 static bool pcm512x_volatile(struct device *dev, unsigned int reg)
 209 {
 210         switch (reg) {
 211         case PCM512x_PLL_EN:
 212         case PCM512x_OVERFLOW:
 213         case PCM512x_RATE_DET_1:
 214         case PCM512x_RATE_DET_2:
 215         case PCM512x_RATE_DET_3:
 216         case PCM512x_RATE_DET_4:
 217         case PCM512x_CLOCK_STATUS:
 218         case PCM512x_ANALOG_MUTE_DET:
 219         case PCM512x_GPIN:
 220         case PCM512x_DIGITAL_MUTE_DET:
 221         case PCM512x_CRAM_CTRL:
 222                 return true;
 223         default:
 224                 /* There are 256 raw register addresses */
 225                 return reg < 0xff;
 226         }
 227 }
 228
 229 static int pcm512x_overclock_pll_get(struct snd_kcontrol *kcontrol,
 230                                      struct snd_ctl_elem_value *ucontrol)
 231 {
 232         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 233         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 234
 235         ucontrol->value.integer.value[0] = pcm512x->overclock_pll;
 236         return 0;
 237 }
 238
 239 static int pcm512x_overclock_pll_put(struct snd_kcontrol *kcontrol,
 240                                      struct snd_ctl_elem_value *ucontrol)
 241 {
 242         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 243         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 244
 245         switch (codec->dapm.bias_level) {
 246         case SND_SOC_BIAS_OFF:
 247         case SND_SOC_BIAS_STANDBY:
 248                 break;
 249         default:
 250                 return -EBUSY;
 251         }
 252
 253         pcm512x->overclock_pll = ucontrol->value.integer.value[0];
 254         return 0;
 255 }
 256
 257 static int pcm512x_overclock_dsp_get(struct snd_kcontrol *kcontrol,
 258                                      struct snd_ctl_elem_value *ucontrol)
 259 {
 260         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 261         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 262
 263         ucontrol->value.integer.value[0] = pcm512x->overclock_dsp;
 264         return 0;
 265 }
 266
 267 static int pcm512x_overclock_dsp_put(struct snd_kcontrol *kcontrol,
 268                                      struct snd_ctl_elem_value *ucontrol)
 269 {
 270         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 271         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 272
 273         switch (codec->dapm.bias_level) {
 274         case SND_SOC_BIAS_OFF:
 275         case SND_SOC_BIAS_STANDBY:
 276                 break;
 277         default:
 278                 return -EBUSY;
 279         }
 280
 281         pcm512x->overclock_dsp = ucontrol->value.integer.value[0];
 282         return 0;
 283 }
 284
 285 static int pcm512x_overclock_dac_get(struct snd_kcontrol *kcontrol,
 286                                      struct snd_ctl_elem_value *ucontrol)
 287 {
 288         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 289         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 290
 291         ucontrol->value.integer.value[0] = pcm512x->overclock_dac;
 292         return 0;
 293 }
 294
 295 static int pcm512x_overclock_dac_put(struct snd_kcontrol *kcontrol,
 296                                      struct snd_ctl_elem_value *ucontrol)
 297 {
 298         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 299         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 300
 301         switch (codec->dapm.bias_level) {
 302         case SND_SOC_BIAS_OFF:
 303         case SND_SOC_BIAS_STANDBY:
 304                 break;
 305         default:
 306                 return -EBUSY;
 307         }
 308
 309         pcm512x->overclock_dac = ucontrol->value.integer.value[0];
 310         return 0;
 311 }
 312
 313 static const DECLARE_TLV_DB_SCALE(digital_tlv, -10350, 50, 1);
 314 static const DECLARE_TLV_DB_SCALE(analog_tlv, -600, 600, 0);
 315 static const DECLARE_TLV_DB_SCALE(boost_tlv, 0, 80, 0);
 316
 317 static const char * const pcm512x_dsp_program_texts[] = {
 318         "FIR interpolation with de-emphasis",
 319         "Low latency IIR with de-emphasis",
 320         "High attenuation with de-emphasis",
 321         "Fixed process flow",
 322         "Ringing-less low latency FIR",
 323 };
 324
 325 static const unsigned int pcm512x_dsp_program_values[] = {
 326         1,
 327         2,
 328         3,
 329         5,
 330         7,
 331 };
 332
 333 static SOC_VALUE_ENUM_SINGLE_DECL(pcm512x_dsp_program,
 334                                   PCM512x_DSP_PROGRAM, 0, 0x1f,
 335                                   pcm512x_dsp_program_texts,
 336                                   pcm512x_dsp_program_values);
 337
 338 static const char * const pcm512x_clk_missing_text[] = {
 339         "1s", "2s", "3s", "4s", "5s", "6s", "7s", "8s"
 340 };
 341
 342 static const struct soc_enum pcm512x_clk_missing =
 343         SOC_ENUM_SINGLE(PCM512x_CLKDET, 0,  8, pcm512x_clk_missing_text);
 344
 345 static const char * const pcm512x_autom_text[] = {
 346         "21ms", "106ms", "213ms", "533ms", "1.07s", "2.13s", "5.33s", "10.66s"
 347 };
 348
 349 static const struct soc_enum pcm512x_autom_l =
 350         SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATML_SHIFT, 8,
 351                         pcm512x_autom_text);
 352
 353 static const struct soc_enum pcm512x_autom_r =
 354         SOC_ENUM_SINGLE(PCM512x_AUTO_MUTE, PCM512x_ATMR_SHIFT, 8,
 355                         pcm512x_autom_text);
 356
 357 static const char * const pcm512x_ramp_rate_text[] = {
 358         "1 sample/update", "2 samples/update", "4 samples/update",
 359         "Immediate"
 360 };
 361
 362 static const struct soc_enum pcm512x_vndf =
 363         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDF_SHIFT, 4,
 364                         pcm512x_ramp_rate_text);
 365
 366 static const struct soc_enum pcm512x_vnuf =
 367         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUF_SHIFT, 4,
 368                         pcm512x_ramp_rate_text);
 369
 370 static const struct soc_enum pcm512x_vedf =
 371         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDF_SHIFT, 4,
 372                         pcm512x_ramp_rate_text);
 373
 374 static const char * const pcm512x_ramp_step_text[] = {
 375         "4dB/step", "2dB/step", "1dB/step", "0.5dB/step"
 376 };
 377
 378 static const struct soc_enum pcm512x_vnds =
 379         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNDS_SHIFT, 4,
 380                         pcm512x_ramp_step_text);
 381
 382 static const struct soc_enum pcm512x_vnus =
 383         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_1, PCM512x_VNUS_SHIFT, 4,
 384                         pcm512x_ramp_step_text);
 385
 386 static const struct soc_enum pcm512x_veds =
 387         SOC_ENUM_SINGLE(PCM512x_DIGITAL_MUTE_2, PCM512x_VEDS_SHIFT, 4,
 388                         pcm512x_ramp_step_text);
 389
 390 static const struct snd_kcontrol_new pcm512x_controls[] = {
 391 SOC_DOUBLE_R_TLV("Digital Playback Volume", PCM512x_DIGITAL_VOLUME_2,
 392                  PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
 393 SOC_DOUBLE_TLV("Analogue Playback Volume", PCM512x_ANALOG_GAIN_CTRL,
 394                PCM512x_LAGN_SHIFT, PCM512x_RAGN_SHIFT, 1, 1, analog_tlv),
 395 SOC_DOUBLE_TLV("Analogue Playback Boost Volume", PCM512x_ANALOG_GAIN_BOOST,
 396                PCM512x_AGBL_SHIFT, PCM512x_AGBR_SHIFT, 1, 0, boost_tlv),
 397 SOC_DOUBLE("Digital Playback Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
 398            PCM512x_RQMR_SHIFT, 1, 1),
 399
 400 SOC_SINGLE("Deemphasis Switch", PCM512x_DSP, PCM512x_DEMP_SHIFT, 1, 1),
 401 SOC_ENUM("DSP Program", pcm512x_dsp_program),
 402
 403 SOC_ENUM("Clock Missing Period", pcm512x_clk_missing),
 404 SOC_ENUM("Auto Mute Time Left", pcm512x_autom_l),
 405 SOC_ENUM("Auto Mute Time Right", pcm512x_autom_r),
 406 SOC_SINGLE("Auto Mute Mono Switch", PCM512x_DIGITAL_MUTE_3,
 407            PCM512x_ACTL_SHIFT, 1, 0),
 408 SOC_DOUBLE("Auto Mute Switch", PCM512x_DIGITAL_MUTE_3, PCM512x_AMLE_SHIFT,
 409            PCM512x_AMRE_SHIFT, 1, 0),
 410
 411 SOC_ENUM("Volume Ramp Down Rate", pcm512x_vndf),
 412 SOC_ENUM("Volume Ramp Down Step", pcm512x_vnds),
 413 SOC_ENUM("Volume Ramp Up Rate", pcm512x_vnuf),
 414 SOC_ENUM("Volume Ramp Up Step", pcm512x_vnus),
 415 SOC_ENUM("Volume Ramp Down Emergency Rate", pcm512x_vedf),
 416 SOC_ENUM("Volume Ramp Down Emergency Step", pcm512x_veds),
 417
 418 SOC_SINGLE_EXT("Max Overclock PLL", SND_SOC_NOPM, 0, 20, 0,
 419                pcm512x_overclock_pll_get, pcm512x_overclock_pll_put),
 420 SOC_SINGLE_EXT("Max Overclock DSP", SND_SOC_NOPM, 0, 40, 0,
 421                pcm512x_overclock_dsp_get, pcm512x_overclock_dsp_put),
 422 SOC_SINGLE_EXT("Max Overclock DAC", SND_SOC_NOPM, 0, 40, 0,
 423                pcm512x_overclock_dac_get, pcm512x_overclock_dac_put),
 424 };
 425
 426 static const struct snd_soc_dapm_widget pcm512x_dapm_widgets[] = {
 427 SND_SOC_DAPM_DAC("DACL", NULL, SND_SOC_NOPM, 0, 0),
 428 SND_SOC_DAPM_DAC("DACR", NULL, SND_SOC_NOPM, 0, 0),
 429
 430 SND_SOC_DAPM_OUTPUT("OUTL"),
 431 SND_SOC_DAPM_OUTPUT("OUTR"),
 432 };
 433
 434 static const struct snd_soc_dapm_route pcm512x_dapm_routes[] = {
 435         { "DACL", NULL, "Playback" },
 436         { "DACR", NULL, "Playback" },
 437
 438         { "OUTL", NULL, "DACL" },
 439         { "OUTR", NULL, "DACR" },
 440 };
 441
 442 static unsigned long pcm512x_pll_max(struct pcm512x_priv *pcm512x)
 443 {
 444         return 25000000 + 25000000 * pcm512x->overclock_pll / 100;
 445 }
 446
 447 static unsigned long pcm512x_dsp_max(struct pcm512x_priv *pcm512x)
 448 {
 449         return 50000000 + 50000000 * pcm512x->overclock_dsp / 100;
 450 }
 451
 452 static unsigned long pcm512x_dac_max(struct pcm512x_priv *pcm512x,
 453                                      unsigned long rate)
 454 {
 455         return rate + rate * pcm512x->overclock_dac / 100;
 456 }
 457
 458 static unsigned long pcm512x_sck_max(struct pcm512x_priv *pcm512x)
 459 {
 460         if (!pcm512x->pll_out)
 461                 return 25000000;
 462         return pcm512x_pll_max(pcm512x);
 463 }
 464
 465 static unsigned long pcm512x_ncp_target(struct pcm512x_priv *pcm512x,
 466                                         unsigned long dac_rate)
 467 {
 468         /*
 469          * If the DAC is not actually overclocked, use the good old
 470          * NCP target rate...
 471          */
 472         if (dac_rate <= 6144000)
 473                 return 1536000;
 474         /*
 475          * ...but if the DAC is in fact overclocked, bump the NCP target
 476          * rate to get the recommended dividers even when overclocking.
 477          */
 478         return pcm512x_dac_max(pcm512x, 1536000);
 479 }
 480
 481 static const u32 pcm512x_dai_rates[] = {
 482         8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000,
 483         88200, 96000, 176400, 192000, 384000,
 484 };
 485
 486 static const struct snd_pcm_hw_constraint_list constraints_slave = {
 487         .count = ARRAY_SIZE(pcm512x_dai_rates),
 488         .list  = pcm512x_dai_rates,
 489 };
 490
 491 static int pcm512x_hw_rule_rate(struct snd_pcm_hw_params *params,
 492                                 struct snd_pcm_hw_rule *rule)
 493 {
 494         struct pcm512x_priv *pcm512x = rule->private;
 495         struct snd_interval ranges[2];
 496         int frame_size;
 497
 498         frame_size = snd_soc_params_to_frame_size(params);
 499         if (frame_size < 0)
 500                 return frame_size;
 501
 502         switch (frame_size) {
 503         case 32:
 504                 /* No hole when the frame size is 32. */
 505                 return 0;
 506         case 48:
 507         case 64:
 508                 /* There is only one hole in the range of supported
 509                  * rates, but it moves with the frame size.
 510                  */
 511                 memset(ranges, 0, sizeof(ranges));
 512                 ranges[0].min = 8000;
 513                 ranges[0].max = pcm512x_sck_max(pcm512x) / frame_size / 2;
 514                 ranges[1].min = DIV_ROUND_UP(16000000, frame_size);
 515                 ranges[1].max = 384000;
 516                 break;
 517         default:
 518                 return -EINVAL;
 519         }
 520
 521         return snd_interval_ranges(hw_param_interval(params, rule->var),
 522                                    ARRAY_SIZE(ranges), ranges, 0);
 523 }
 524
 525 static int pcm512x_dai_startup_master(struct snd_pcm_substream *substream,
 526                                       struct snd_soc_dai *dai)
 527 {
 528         struct snd_soc_codec *codec = dai->codec;
 529         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 530         struct device *dev = dai->dev;
 531         struct snd_pcm_hw_constraint_ratnums *constraints_no_pll;
 532         struct snd_ratnum *rats_no_pll;
 533
 534         if (IS_ERR(pcm512x->sclk)) {
 535                 dev_err(dev, "Need SCLK for master mode: %ld\n",
 536                         PTR_ERR(pcm512x->sclk));
 537                 return PTR_ERR(pcm512x->sclk);
 538         }
 539
 540         if (pcm512x->pll_out)
 541                 return snd_pcm_hw_rule_add(substream->runtime, 0,
 542                                            SNDRV_PCM_HW_PARAM_RATE,
 543                                            pcm512x_hw_rule_rate,
 544                                            pcm512x,
 545                                            SNDRV_PCM_HW_PARAM_FRAME_BITS,
 546                                            SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 547
 548         constraints_no_pll = devm_kzalloc(dev, sizeof(*constraints_no_pll),
 549                                           GFP_KERNEL);
 550         if (!constraints_no_pll)
 551                 return -ENOMEM;
 552         constraints_no_pll->nrats = 1;
 553         rats_no_pll = devm_kzalloc(dev, sizeof(*rats_no_pll), GFP_KERNEL);
 554         if (!rats_no_pll)
 555                 return -ENOMEM;
 556         constraints_no_pll->rats = rats_no_pll;
 557         rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
 558         rats_no_pll->den_min = 1;
 559         rats_no_pll->den_max = 128;
 560         rats_no_pll->den_step = 1;
 561
 562         return snd_pcm_hw_constraint_ratnums(substream->runtime, 0,
 563                                              SNDRV_PCM_HW_PARAM_RATE,
 564                                              constraints_no_pll);
 565 }
 566
 567 static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream,
 568                                      struct snd_soc_dai *dai)
 569 {
 570         struct snd_soc_codec *codec = dai->codec;
 571         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 572         struct device *dev = dai->dev;
 573         struct regmap *regmap = pcm512x->regmap;
 574
 575         if (IS_ERR(pcm512x->sclk)) {
 576                 dev_info(dev, "No SCLK, using BCLK: %ld\n",
 577                          PTR_ERR(pcm512x->sclk));
 578
 579                 /* Disable reporting of missing SCLK as an error */
 580                 regmap_update_bits(regmap, PCM512x_ERROR_DETECT,
 581                                    PCM512x_IDCH, PCM512x_IDCH);
 582
 583                 /* Switch PLL input to BCLK */
 584                 regmap_update_bits(regmap, PCM512x_PLL_REF,
 585                                    PCM512x_SREF, PCM512x_SREF_BCK);
 586         }
 587
 588         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 589                                           SNDRV_PCM_HW_PARAM_RATE,
 590                                           &constraints_slave);
 591 }
 592
 593 static int pcm512x_dai_startup(struct snd_pcm_substream *substream,
 594                                struct snd_soc_dai *dai)
 595 {
 596         struct snd_soc_codec *codec = dai->codec;
 597         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 598
 599         switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 600         case SND_SOC_DAIFMT_CBM_CFM:
 601         case SND_SOC_DAIFMT_CBM_CFS:
 602                 return pcm512x_dai_startup_master(substream, dai);
 603
 604         case SND_SOC_DAIFMT_CBS_CFS:
 605                 return pcm512x_dai_startup_slave(substream, dai);
 606
 607         default:
 608                 return -EINVAL;
 609         }
 610 }
 611
 612 static int pcm512x_set_bias_level(struct snd_soc_codec *codec,
 613                                   enum snd_soc_bias_level level)
 614 {
 615         struct pcm512x_priv *pcm512x = dev_get_drvdata(codec->dev);
 616         int ret;
 617
 618         switch (level) {
 619         case SND_SOC_BIAS_ON:
 620         case SND_SOC_BIAS_PREPARE:
 621                 break;
 622
 623         case SND_SOC_BIAS_STANDBY:
 624                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
 625                                          PCM512x_RQST, 0);
 626                 if (ret != 0) {
 627                         dev_err(codec->dev, "Failed to remove standby: %d\n",
 628                                 ret);
 629                         return ret;
 630                 }
 631                 break;
 632
 633         case SND_SOC_BIAS_OFF:
 634                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
 635                                          PCM512x_RQST, PCM512x_RQST);
 636                 if (ret != 0) {
 637                         dev_err(codec->dev, "Failed to request standby: %d\n",
 638                                 ret);
 639                         return ret;
 640                 }
 641                 break;
 642         }
 643
 644         codec->dapm.bias_level = level;
 645
 646         return 0;
 647 }
 648
 649 static unsigned long pcm512x_find_sck(struct snd_soc_dai *dai,
 650                                       unsigned long bclk_rate)
 651 {
 652         struct device *dev = dai->dev;
 653         struct snd_soc_codec *codec = dai->codec;
 654         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 655         unsigned long sck_rate;
 656         int pow2;
 657
 658         /* 64 MHz <= pll_rate <= 100 MHz, VREF mode */
 659         /* 16 MHz <= sck_rate <=  25 MHz, VREF mode */
 660
 661         /* select sck_rate as a multiple of bclk_rate but still with
 662          * as many factors of 2 as possible, as that makes it easier
 663          * to find a fast DAC rate
 664          */
 665         pow2 = 1 << fls((pcm512x_pll_max(pcm512x) - 16000000) / bclk_rate);
 666         for (; pow2; pow2 >>= 1) {
 667                 sck_rate = rounddown(pcm512x_pll_max(pcm512x),
 668                                      bclk_rate * pow2);
 669                 if (sck_rate >= 16000000)
 670                         break;
 671         }
 672         if (!pow2) {
 673                 dev_err(dev, "Impossible to generate a suitable SCK\n");
 674                 return 0;
 675         }
 676
 677         dev_dbg(dev, "sck_rate %lu\n", sck_rate);
 678         return sck_rate;
 679 }
 680
 681 /* pll_rate = pllin_rate * R * J.D / P
 682  * 1 <= R <= 16
 683  * 1 <= J <= 63
 684  * 0 <= D <= 9999
 685  * 1 <= P <= 15
 686  * 64 MHz <= pll_rate <= 100 MHz
 687  * if D == 0
 688  *     1 MHz <= pllin_rate / P <= 20 MHz
 689  * else if D > 0
 690  *     6.667 MHz <= pllin_rate / P <= 20 MHz
 691  *     4 <= J <= 11
 692  *     R = 1
 693  */
 694 static int pcm512x_find_pll_coeff(struct snd_soc_dai *dai,
 695                                   unsigned long pllin_rate,
 696                                   unsigned long pll_rate)
 697 {
 698         struct device *dev = dai->dev;
 699         struct snd_soc_codec *codec = dai->codec;
 700         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 701         unsigned long common;
 702         int R, J, D, P;
 703         unsigned long K; /* 10000 * J.D */
 704         unsigned long num;
 705         unsigned long den;
 706
 707         common = gcd(pll_rate, pllin_rate);
 708         dev_dbg(dev, "pll %lu pllin %lu common %lu\n",
 709                 pll_rate, pllin_rate, common);
 710         num = pll_rate / common;
 711         den = pllin_rate / common;
 712
 713         /* pllin_rate / P (or here, den) cannot be greater than 20 MHz */
 714         if (pllin_rate / den > 20000000 && num < 8) {
 715                 num *= DIV_ROUND_UP(pllin_rate / den, 20000000);
 716                 den *= DIV_ROUND_UP(pllin_rate / den, 20000000);
 717         }
 718         dev_dbg(dev, "num / den = %lu / %lu\n", num, den);
 719
 720         P = den;
 721         if (den <= 15 && num <= 16 * 63
 722             && 1000000 <= pllin_rate / P && pllin_rate / P <= 20000000) {
 723                 /* Try the case with D = 0 */
 724                 D = 0;
 725                 /* factor 'num' into J and R, such that R <= 16 and J <= 63 */
 726                 for (R = 16; R; R--) {
 727                         if (num % R)
 728                                 continue;
 729                         J = num / R;
 730                         if (J == 0 || J > 63)
 731                                 continue;
 732
 733                         dev_dbg(dev, "R * J / P = %d * %d / %d\n", R, J, P);
 734                         pcm512x->real_pll = pll_rate;
 735                         goto done;
 736                 }
 737                 /* no luck */
 738         }
 739
 740         R = 1;
 741
 742         if (num > 0xffffffffUL / 10000)
 743                 goto fallback;
 744
 745         /* Try to find an exact pll_rate using the D > 0 case */
 746         common = gcd(10000 * num, den);
 747         num = 10000 * num / common;
 748         den /= common;
 749         dev_dbg(dev, "num %lu den %lu common %lu\n", num, den, common);
 750
 751         for (P = den; P <= 15; P++) {
 752                 if (pllin_rate / P < 6667000 || 200000000 < pllin_rate / P)
 753                         continue;
 754                 if (num * P % den)
 755                         continue;
 756                 K = num * P / den;
 757                 /* J == 12 is ok if D == 0 */
 758                 if (K < 40000 || K > 120000)
 759                         continue;
 760
 761                 J = K / 10000;
 762                 D = K % 10000;
 763                 dev_dbg(dev, "J.D / P = %d.%04d / %d\n", J, D, P);
 764                 pcm512x->real_pll = pll_rate;
 765                 goto done;
 766         }
 767
 768         /* Fall back to an approximate pll_rate */
 769
 770 fallback:
 771         /* find smallest possible P */
 772         P = DIV_ROUND_UP(pllin_rate, 20000000);
 773         if (!P)
 774                 P = 1;
 775         else if (P > 15) {
 776                 dev_err(dev, "Need a slower clock as pll-input\n");
 777                 return -EINVAL;
 778         }
 779         if (pllin_rate / P < 6667000) {
 780                 dev_err(dev, "Need a faster clock as pll-input\n");
 781                 return -EINVAL;
 782         }
 783         K = DIV_ROUND_CLOSEST_ULL(10000ULL * pll_rate * P, pllin_rate);
 784         if (K < 40000)
 785                 K = 40000;
 786         /* J == 12 is ok if D == 0 */
 787         if (K > 120000)
 788                 K = 120000;
 789         J = K / 10000;
 790         D = K % 10000;
 791         dev_dbg(dev, "J.D / P ~ %d.%04d / %d\n", J, D, P);
 792         pcm512x->real_pll = DIV_ROUND_DOWN_ULL((u64)K * pllin_rate, 10000 * P);
 793
 794 done:
 795         pcm512x->pll_r = R;
 796         pcm512x->pll_j = J;
 797         pcm512x->pll_d = D;
 798         pcm512x->pll_p = P;
 799         return 0;
 800 }
 801
 802 static unsigned long pcm512x_pllin_dac_rate(struct snd_soc_dai *dai,
 803                                             unsigned long osr_rate,
 804                                             unsigned long pllin_rate)
 805 {
 806         struct snd_soc_codec *codec = dai->codec;
 807         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 808         unsigned long dac_rate;
 809
 810         if (!pcm512x->pll_out)
 811                 return 0; /* no PLL to bypass, force SCK as DAC input */
 812
 813         if (pllin_rate % osr_rate)
 814                 return 0; /* futile, quit early */
 815
 816         /* run DAC no faster than 6144000 Hz */
 817         for (dac_rate = rounddown(pcm512x_dac_max(pcm512x, 6144000), osr_rate);
 818              dac_rate;
 819              dac_rate -= osr_rate) {
 820
 821                 if (pllin_rate / dac_rate > 128)
 822                         return 0; /* DAC divider would be too big */
 823
 824                 if (!(pllin_rate % dac_rate))
 825                         return dac_rate;
 826
 827                 dac_rate -= osr_rate;
 828         }
 829
 830         return 0;
 831 }
 832
 833 static int pcm512x_set_dividers(struct snd_soc_dai *dai,
 834                                 struct snd_pcm_hw_params *params)
 835 {
 836         struct device *dev = dai->dev;
 837         struct snd_soc_codec *codec = dai->codec;
 838         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
 839         unsigned long pllin_rate = 0;
 840         unsigned long pll_rate;
 841         unsigned long sck_rate;
 842         unsigned long mck_rate;
 843         unsigned long bclk_rate;
 844         unsigned long sample_rate;
 845         unsigned long osr_rate;
 846         unsigned long dacsrc_rate;
 847         int bclk_div;
 848         int lrclk_div;
 849         int dsp_div;
 850         int dac_div;
 851         unsigned long dac_rate;
 852         int ncp_div;
 853         int osr_div;
 854         int ret;
 855         int idac;
 856         int fssp;
 857         int gpio;
 858
 859         lrclk_div = snd_soc_params_to_frame_size(params);
 860         if (lrclk_div == 0) {
 861                 dev_err(dev, "No LRCLK?\n");
 862                 return -EINVAL;
 863         }
 864
 865         if (!pcm512x->pll_out) {
 866                 sck_rate = clk_get_rate(pcm512x->sclk);
 867                 bclk_div = params->rate_den * 64 / lrclk_div;
 868                 bclk_rate = DIV_ROUND_CLOSEST(sck_rate, bclk_div);
 869
 870                 mck_rate = sck_rate;
 871         } else {
 872                 ret = snd_soc_params_to_bclk(params);
 873                 if (ret < 0) {
 874                         dev_err(dev, "Failed to find suitable BCLK: %d\n", ret);
 875                         return ret;
 876                 }
 877                 if (ret == 0) {
 878                         dev_err(dev, "No BCLK?\n");
 879                         return -EINVAL;
 880                 }
 881                 bclk_rate = ret;
 882
 883                 pllin_rate = clk_get_rate(pcm512x->sclk);
 884
 885                 sck_rate = pcm512x_find_sck(dai, bclk_rate);
 886                 if (!sck_rate)
 887                         return -EINVAL;
 888                 pll_rate = 4 * sck_rate;
 889
 890                 ret = pcm512x_find_pll_coeff(dai, pllin_rate, pll_rate);
 891                 if (ret != 0)
 892                         return ret;
 893
 894                 ret = regmap_write(pcm512x->regmap,
 895                                    PCM512x_PLL_COEFF_0, pcm512x->pll_p - 1);
 896                 if (ret != 0) {
 897                         dev_err(dev, "Failed to write PLL P: %d\n", ret);
 898                         return ret;
 899                 }
 900
 901                 ret = regmap_write(pcm512x->regmap,
 902                                    PCM512x_PLL_COEFF_1, pcm512x->pll_j);
 903                 if (ret != 0) {
 904                         dev_err(dev, "Failed to write PLL J: %d\n", ret);
 905                         return ret;
 906                 }
 907
 908                 ret = regmap_write(pcm512x->regmap,
 909                                    PCM512x_PLL_COEFF_2, pcm512x->pll_d >> 8);
 910                 if (ret != 0) {
 911                         dev_err(dev, "Failed to write PLL D msb: %d\n", ret);
 912                         return ret;
 913                 }
 914
 915                 ret = regmap_write(pcm512x->regmap,
 916                                    PCM512x_PLL_COEFF_3, pcm512x->pll_d & 0xff);
 917                 if (ret != 0) {
 918                         dev_err(dev, "Failed to write PLL D lsb: %d\n", ret);
 919                         return ret;
 920                 }
 921
 922                 ret = regmap_write(pcm512x->regmap,
 923                                    PCM512x_PLL_COEFF_4, pcm512x->pll_r - 1);
 924                 if (ret != 0) {
 925                         dev_err(dev, "Failed to write PLL R: %d\n", ret);
 926                         return ret;
 927                 }
 928
 929                 mck_rate = pcm512x->real_pll;
 930
 931                 bclk_div = DIV_ROUND_CLOSEST(sck_rate, bclk_rate);
 932         }
 933
 934         if (bclk_div > 128) {
 935                 dev_err(dev, "Failed to find BCLK divider\n");
 936                 return -EINVAL;
 937         }
 938
 939         /* the actual rate */
 940         sample_rate = sck_rate / bclk_div / lrclk_div;
 941         osr_rate = 16 * sample_rate;
 942
 943         /* run DSP no faster than 50 MHz */
 944         dsp_div = mck_rate > pcm512x_dsp_max(pcm512x) ? 2 : 1;
 945
 946         dac_rate = pcm512x_pllin_dac_rate(dai, osr_rate, pllin_rate);
 947         if (dac_rate) {
 948                 /* the desired clock rate is "compatible" with the pll input
 949                  * clock, so use that clock as dac input instead of the pll
 950                  * output clock since the pll will introduce jitter and thus
 951                  * noise.
 952                  */
 953                 dev_dbg(dev, "using pll input as dac input\n");
 954                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF,
 955                                          PCM512x_SDAC, PCM512x_SDAC_GPIO);
 956                 if (ret != 0) {
 957                         dev_err(codec->dev,
 958                                 "Failed to set gpio as dacref: %d\n", ret);
 959                         return ret;
 960                 }
 961
 962                 gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1;
 963                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_DACIN,
 964                                          PCM512x_GREF, gpio);
 965                 if (ret != 0) {
 966                         dev_err(codec->dev,
 967                                 "Failed to set gpio %d as dacin: %d\n",
 968                                 pcm512x->pll_in, ret);
 969                         return ret;
 970                 }
 971
 972                 dacsrc_rate = pllin_rate;
 973         } else {
 974                 /* run DAC no faster than 6144000 Hz */
 975                 unsigned long dac_mul = pcm512x_dac_max(pcm512x, 6144000)
 976                         / osr_rate;
 977                 unsigned long sck_mul = sck_rate / osr_rate;
 978
 979                 for (; dac_mul; dac_mul--) {
 980                         if (!(sck_mul % dac_mul))
 981                                 break;
 982                 }
 983                 if (!dac_mul) {
 984                         dev_err(dev, "Failed to find DAC rate\n");
 985                         return -EINVAL;
 986                 }
 987
 988                 dac_rate = dac_mul * osr_rate;
 989                 dev_dbg(dev, "dac_rate %lu sample_rate %lu\n",
 990                         dac_rate, sample_rate);
 991
 992                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_DAC_REF,
 993                                          PCM512x_SDAC, PCM512x_SDAC_SCK);
 994                 if (ret != 0) {
 995                         dev_err(codec->dev,
 996                                 "Failed to set sck as dacref: %d\n", ret);
 997                         return ret;
 998                 }
 999
1000                 dacsrc_rate = sck_rate;
1001         }
1002
1003         osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate);
1004         if (osr_div > 128) {
1005                 dev_err(dev, "Failed to find OSR divider\n");
1006                 return -EINVAL;
1007         }
1008
1009         dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate);
1010         if (dac_div > 128) {
1011                 dev_err(dev, "Failed to find DAC divider\n");
1012                 return -EINVAL;
1013         }
1014         dac_rate = dacsrc_rate / dac_div;
1015
1016         ncp_div = DIV_ROUND_CLOSEST(dac_rate,
1017                                     pcm512x_ncp_target(pcm512x, dac_rate));
1018         if (ncp_div > 128 || dac_rate / ncp_div > 2048000) {
1019                 /* run NCP no faster than 2048000 Hz, but why? */
1020                 ncp_div = DIV_ROUND_UP(dac_rate, 2048000);
1021                 if (ncp_div > 128) {
1022                         dev_err(dev, "Failed to find NCP divider\n");
1023                         return -EINVAL;
1024                 }
1025         }
1026
1027         idac = mck_rate / (dsp_div * sample_rate);
1028
1029         ret = regmap_write(pcm512x->regmap, PCM512x_DSP_CLKDIV, dsp_div - 1);
1030         if (ret != 0) {
1031                 dev_err(dev, "Failed to write DSP divider: %d\n", ret);
1032                 return ret;
1033         }
1034
1035         ret = regmap_write(pcm512x->regmap, PCM512x_DAC_CLKDIV, dac_div - 1);
1036         if (ret != 0) {
1037                 dev_err(dev, "Failed to write DAC divider: %d\n", ret);
1038                 return ret;
1039         }
1040
1041         ret = regmap_write(pcm512x->regmap, PCM512x_NCP_CLKDIV, ncp_div - 1);
1042         if (ret != 0) {
1043                 dev_err(dev, "Failed to write NCP divider: %d\n", ret);
1044                 return ret;
1045         }
1046
1047         ret = regmap_write(pcm512x->regmap, PCM512x_OSR_CLKDIV, osr_div - 1);
1048         if (ret != 0) {
1049                 dev_err(dev, "Failed to write OSR divider: %d\n", ret);
1050                 return ret;
1051         }
1052
1053         ret = regmap_write(pcm512x->regmap,
1054                            PCM512x_MASTER_CLKDIV_1, bclk_div - 1);
1055         if (ret != 0) {
1056                 dev_err(dev, "Failed to write BCLK divider: %d\n", ret);
1057                 return ret;
1058         }
1059
1060         ret = regmap_write(pcm512x->regmap,
1061                            PCM512x_MASTER_CLKDIV_2, lrclk_div - 1);
1062         if (ret != 0) {
1063                 dev_err(dev, "Failed to write LRCLK divider: %d\n", ret);
1064                 return ret;
1065         }
1066
1067         ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_1, idac >> 8);
1068         if (ret != 0) {
1069                 dev_err(dev, "Failed to write IDAC msb divider: %d\n", ret);
1070                 return ret;
1071         }
1072
1073         ret = regmap_write(pcm512x->regmap, PCM512x_IDAC_2, idac & 0xff);
1074         if (ret != 0) {
1075                 dev_err(dev, "Failed to write IDAC lsb divider: %d\n", ret);
1076                 return ret;
1077         }
1078
1079         if (sample_rate <= pcm512x_dac_max(pcm512x, 48000))
1080                 fssp = PCM512x_FSSP_48KHZ;
1081         else if (sample_rate <= pcm512x_dac_max(pcm512x, 96000))
1082                 fssp = PCM512x_FSSP_96KHZ;
1083         else if (sample_rate <= pcm512x_dac_max(pcm512x, 192000))
1084                 fssp = PCM512x_FSSP_192KHZ;
1085         else
1086                 fssp = PCM512x_FSSP_384KHZ;
1087         ret = regmap_update_bits(pcm512x->regmap, PCM512x_FS_SPEED_MODE,
1088                                  PCM512x_FSSP, fssp);
1089         if (ret != 0) {
1090                 dev_err(codec->dev, "Failed to set fs speed: %d\n", ret);
1091                 return ret;
1092         }
1093
1094         dev_dbg(codec->dev, "DSP divider %d\n", dsp_div);
1095         dev_dbg(codec->dev, "DAC divider %d\n", dac_div);
1096         dev_dbg(codec->dev, "NCP divider %d\n", ncp_div);
1097         dev_dbg(codec->dev, "OSR divider %d\n", osr_div);
1098         dev_dbg(codec->dev, "BCK divider %d\n", bclk_div);
1099         dev_dbg(codec->dev, "LRCK divider %d\n", lrclk_div);
1100         dev_dbg(codec->dev, "IDAC %d\n", idac);
1101         dev_dbg(codec->dev, "1<<FSSP %d\n", 1 << fssp);
1102
1103         return 0;
1104 }
1105
1106 static int pcm512x_hw_params(struct snd_pcm_substream *substream,
1107                              struct snd_pcm_hw_params *params,
1108                              struct snd_soc_dai *dai)
1109 {
1110         struct snd_soc_codec *codec = dai->codec;
1111         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
1112         int alen;
1113         int gpio;
1114         int clock_output;
1115         int master_mode;
1116         int ret;
1117
1118         dev_dbg(codec->dev, "hw_params %u Hz, %u channels\n",
1119                 params_rate(params),
1120                 params_channels(params));
1121
1122         switch (snd_pcm_format_width(params_format(params))) {
1123         case 16:
1124                 alen = PCM512x_ALEN_16;
1125                 break;
1126         case 20:
1127                 alen = PCM512x_ALEN_20;
1128                 break;
1129         case 24:
1130                 alen = PCM512x_ALEN_24;
1131                 break;
1132         case 32:
1133                 alen = PCM512x_ALEN_32;
1134                 break;
1135         default:
1136                 dev_err(codec->dev, "Bad frame size: %d\n",
1137                         snd_pcm_format_width(params_format(params)));
1138                 return -EINVAL;
1139         }
1140
1141         switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1142         case SND_SOC_DAIFMT_CBS_CFS:
1143                 ret = regmap_update_bits(pcm512x->regmap,
1144                                          PCM512x_BCLK_LRCLK_CFG,
1145                                          PCM512x_BCKP
1146                                          | PCM512x_BCKO | PCM512x_LRKO,
1147                                          0);
1148                 if (ret != 0) {
1149                         dev_err(codec->dev,
1150                                 "Failed to enable slave mode: %d\n", ret);
1151                         return ret;
1152                 }
1153
1154                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
1155                                          PCM512x_DCAS, 0);
1156                 if (ret != 0) {
1157                         dev_err(codec->dev,
1158                                 "Failed to enable clock divider autoset: %d\n",
1159                                 ret);
1160                         return ret;
1161                 }
1162                 return 0;
1163         case SND_SOC_DAIFMT_CBM_CFM:
1164                 clock_output = PCM512x_BCKO | PCM512x_LRKO;
1165                 master_mode = PCM512x_RLRK | PCM512x_RBCK;
1166                 break;
1167         case SND_SOC_DAIFMT_CBM_CFS:
1168                 clock_output = PCM512x_BCKO;
1169                 master_mode = PCM512x_RBCK;
1170                 break;
1171         default:
1172                 return -EINVAL;
1173         }
1174
1175         ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1,
1176                                  PCM512x_ALEN, alen);
1177         if (ret != 0) {
1178                 dev_err(codec->dev, "Failed to set frame size: %d\n", ret);
1179                 return ret;
1180         }
1181
1182         if (pcm512x->pll_out) {
1183                 ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11);
1184                 if (ret != 0) {
1185                         dev_err(codec->dev, "Failed to set FLEX_A: %d\n", ret);
1186                         return ret;
1187                 }
1188
1189                 ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_B, 0xff);
1190                 if (ret != 0) {
1191                         dev_err(codec->dev, "Failed to set FLEX_B: %d\n", ret);
1192                         return ret;
1193                 }
1194
1195                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
1196                                          PCM512x_IDFS | PCM512x_IDBK
1197                                          | PCM512x_IDSK | PCM512x_IDCH
1198                                          | PCM512x_IDCM | PCM512x_DCAS
1199                                          | PCM512x_IPLK,
1200                                          PCM512x_IDFS | PCM512x_IDBK
1201                                          | PCM512x_IDSK | PCM512x_IDCH
1202                                          | PCM512x_DCAS);
1203                 if (ret != 0) {
1204                         dev_err(codec->dev,
1205                                 "Failed to ignore auto-clock failures: %d\n",
1206                                 ret);
1207                         return ret;
1208                 }
1209         } else {
1210                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_ERROR_DETECT,
1211                                          PCM512x_IDFS | PCM512x_IDBK
1212                                          | PCM512x_IDSK | PCM512x_IDCH
1213                                          | PCM512x_IDCM | PCM512x_DCAS
1214                                          | PCM512x_IPLK,
1215                                          PCM512x_IDFS | PCM512x_IDBK
1216                                          | PCM512x_IDSK | PCM512x_IDCH
1217                                          | PCM512x_DCAS | PCM512x_IPLK);
1218                 if (ret != 0) {
1219                         dev_err(codec->dev,
1220                                 "Failed to ignore auto-clock failures: %d\n",
1221                                 ret);
1222                         return ret;
1223                 }
1224
1225                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN,
1226                                          PCM512x_PLLE, 0);
1227                 if (ret != 0) {
1228                         dev_err(codec->dev, "Failed to disable pll: %d\n", ret);
1229                         return ret;
1230                 }
1231         }
1232
1233         ret = pcm512x_set_dividers(dai, params);
1234         if (ret != 0)
1235                 return ret;
1236
1237         if (pcm512x->pll_out) {
1238                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_REF,
1239                                          PCM512x_SREF, PCM512x_SREF_GPIO);
1240                 if (ret != 0) {
1241                         dev_err(codec->dev,
1242                                 "Failed to set gpio as pllref: %d\n", ret);
1243                         return ret;
1244                 }
1245
1246                 gpio = PCM512x_GREF_GPIO1 + pcm512x->pll_in - 1;
1247                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_PLLIN,
1248                                          PCM512x_GREF, gpio);
1249                 if (ret != 0) {
1250                         dev_err(codec->dev,
1251                                 "Failed to set gpio %d as pllin: %d\n",
1252                                 pcm512x->pll_in, ret);
1253                         return ret;
1254                 }
1255
1256                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_PLL_EN,
1257                                          PCM512x_PLLE, PCM512x_PLLE);
1258                 if (ret != 0) {
1259                         dev_err(codec->dev, "Failed to enable pll: %d\n", ret);
1260                         return ret;
1261                 }
1262         }
1263
1264         ret = regmap_update_bits(pcm512x->regmap, PCM512x_BCLK_LRCLK_CFG,
1265                                  PCM512x_BCKP | PCM512x_BCKO | PCM512x_LRKO,
1266                                  clock_output);
1267         if (ret != 0) {
1268                 dev_err(codec->dev, "Failed to enable clock output: %d\n", ret);
1269                 return ret;
1270         }
1271
1272         ret = regmap_update_bits(pcm512x->regmap, PCM512x_MASTER_MODE,
1273                                  PCM512x_RLRK | PCM512x_RBCK,
1274                                  master_mode);
1275         if (ret != 0) {
1276                 dev_err(codec->dev, "Failed to enable master mode: %d\n", ret);
1277                 return ret;
1278         }
1279
1280         if (pcm512x->pll_out) {
1281                 gpio = PCM512x_G1OE << (pcm512x->pll_out - 1);
1282                 ret = regmap_update_bits(pcm512x->regmap, PCM512x_GPIO_EN,
1283                                          gpio, gpio);
1284                 if (ret != 0) {
1285                         dev_err(codec->dev, "Failed to enable gpio %d: %d\n",
1286                                 pcm512x->pll_out, ret);
1287                         return ret;
1288                 }
1289
1290                 gpio = PCM512x_GPIO_OUTPUT_1 + pcm512x->pll_out - 1;
1291                 ret = regmap_update_bits(pcm512x->regmap, gpio,
1292                                          PCM512x_GxSL, PCM512x_GxSL_PLLCK);
1293                 if (ret != 0) {
1294                         dev_err(codec->dev, "Failed to output pll on %d: %d\n",
1295                                 ret, pcm512x->pll_out);
1296                         return ret;
1297                 }
1298         }
1299
1300         ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE,
1301                                  PCM512x_RQSY, PCM512x_RQSY_HALT);
1302         if (ret != 0) {
1303                 dev_err(codec->dev, "Failed to halt clocks: %d\n", ret);
1304                 return ret;
1305         }
1306
1307         ret = regmap_update_bits(pcm512x->regmap, PCM512x_SYNCHRONIZE,
1308                                  PCM512x_RQSY, PCM512x_RQSY_RESUME);
1309         if (ret != 0) {
1310                 dev_err(codec->dev, "Failed to resume clocks: %d\n", ret);
1311                 return ret;
1312         }
1313
1314         return 0;
1315 }
1316
1317 static int pcm512x_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
1318 {
1319         struct snd_soc_codec *codec = dai->codec;
1320         struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
1321
1322         pcm512x->fmt = fmt;
1323
1324         return 0;
1325 }
1326
1327 static const struct snd_soc_dai_ops pcm512x_dai_ops = {
1328         .startup = pcm512x_dai_startup,
1329         .hw_params = pcm512x_hw_params,
1330         .set_fmt = pcm512x_set_fmt,
1331 };
1332
1333 static struct snd_soc_dai_driver pcm512x_dai = {
1334         .name = "pcm512x-hifi",
1335         .playback = {
1336                 .stream_name = "Playback",
1337                 .channels_min = 2,
1338                 .channels_max = 2,
1339                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
1340                 .rate_min = 8000,
1341                 .rate_max = 384000,
1342                 .formats = SNDRV_PCM_FMTBIT_S16_LE |
1343                            SNDRV_PCM_FMTBIT_S24_LE |
1344                            SNDRV_PCM_FMTBIT_S32_LE
1345         },
1346         .ops = &pcm512x_dai_ops,
1347 };
1348
1349 static struct snd_soc_codec_driver pcm512x_codec_driver = {
1350         .set_bias_level = pcm512x_set_bias_level,
1351         .idle_bias_off = true,
1352
1353         .controls = pcm512x_controls,
1354         .num_controls = ARRAY_SIZE(pcm512x_controls),
1355         .dapm_widgets = pcm512x_dapm_widgets,
1356         .num_dapm_widgets = ARRAY_SIZE(pcm512x_dapm_widgets),
1357         .dapm_routes = pcm512x_dapm_routes,
1358         .num_dapm_routes = ARRAY_SIZE(pcm512x_dapm_routes),
1359 };
1360
1361 static const struct regmap_range_cfg pcm512x_range = {
1362         .name = "Pages", .range_min = PCM512x_VIRT_BASE,
1363         .range_max = PCM512x_MAX_REGISTER,
1364         .selector_reg = PCM512x_PAGE,
1365         .selector_mask = 0xff,
1366         .window_start = 0, .window_len = 0x100,
1367 };
1368
1369 const struct regmap_config pcm512x_regmap = {
1370         .reg_bits = 8,
1371         .val_bits = 8,
1372
1373         .readable_reg = pcm512x_readable,
1374         .volatile_reg = pcm512x_volatile,
1375
1376         .ranges = &pcm512x_range,
1377         .num_ranges = 1,
1378
1379         .max_register = PCM512x_MAX_REGISTER,
1380         .reg_defaults = pcm512x_reg_defaults,
1381         .num_reg_defaults = ARRAY_SIZE(pcm512x_reg_defaults),
1382         .cache_type = REGCACHE_RBTREE,
1383 };
1384 EXPORT_SYMBOL_GPL(pcm512x_regmap);
1385
1386 int pcm512x_probe(struct device *dev, struct regmap *regmap)
1387 {
1388         struct pcm512x_priv *pcm512x;
1389         int i, ret;
1390
1391         pcm512x = devm_kzalloc(dev, sizeof(struct pcm512x_priv), GFP_KERNEL);
1392         if (!pcm512x)
1393                 return -ENOMEM;
1394
1395         dev_set_drvdata(dev, pcm512x);
1396         pcm512x->regmap = regmap;
1397
1398         for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++)
1399                 pcm512x->supplies[i].supply = pcm512x_supply_names[i];
1400
1401         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pcm512x->supplies),
1402                                       pcm512x->supplies);
1403         if (ret != 0) {
1404                 dev_err(dev, "Failed to get supplies: %d\n", ret);
1405                 return ret;
1406         }
1407
1408         pcm512x->supply_nb[0].notifier_call = pcm512x_regulator_event_0;
1409         pcm512x->supply_nb[1].notifier_call = pcm512x_regulator_event_1;
1410         pcm512x->supply_nb[2].notifier_call = pcm512x_regulator_event_2;
1411
1412         for (i = 0; i < ARRAY_SIZE(pcm512x->supplies); i++) {
1413                 ret = regulator_register_notifier(pcm512x->supplies[i].consumer,
1414                                                   &pcm512x->supply_nb[i]);
1415                 if (ret != 0) {
1416                         dev_err(dev,
1417                                 "Failed to register regulator notifier: %d\n",
1418                                 ret);
1419                 }
1420         }
1421
1422         ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
1423                                     pcm512x->supplies);
1424         if (ret != 0) {
1425                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
1426                 return ret;
1427         }
1428
1429         /* Reset the device, verifying I/O in the process for I2C */
1430         ret = regmap_write(regmap, PCM512x_RESET,
1431                            PCM512x_RSTM | PCM512x_RSTR);
1432         if (ret != 0) {
1433                 dev_err(dev, "Failed to reset device: %d\n", ret);
1434                 goto err;
1435         }
1436
1437         ret = regmap_write(regmap, PCM512x_RESET, 0);
1438         if (ret != 0) {
1439                 dev_err(dev, "Failed to reset device: %d\n", ret);
1440                 goto err;
1441         }
1442
1443         pcm512x->sclk = devm_clk_get(dev, NULL);
1444         if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
1445                 return -EPROBE_DEFER;
1446         if (!IS_ERR(pcm512x->sclk)) {
1447                 ret = clk_prepare_enable(pcm512x->sclk);
1448                 if (ret != 0) {
1449                         dev_err(dev, "Failed to enable SCLK: %d\n", ret);
1450                         return ret;
1451                 }
1452         }
1453
1454         /* Default to standby mode */
1455         ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
1456                                  PCM512x_RQST, PCM512x_RQST);
1457         if (ret != 0) {
1458                 dev_err(dev, "Failed to request standby: %d\n",
1459                         ret);
1460                 goto err_clk;
1461         }
1462
1463         pm_runtime_set_active(dev);
1464         pm_runtime_enable(dev);
1465         pm_runtime_idle(dev);
1466
1467 #ifdef CONFIG_OF
1468         if (dev->of_node) {
1469                 const struct device_node *np = dev->of_node;
1470                 u32 val;
1471
1472                 if (of_property_read_u32(np, "pll-in", &val) >= 0) {
1473                         if (val > 6) {
1474                                 dev_err(dev, "Invalid pll-in\n");
1475                                 ret = -EINVAL;
1476                                 goto err_clk;
1477                         }
1478                         pcm512x->pll_in = val;
1479                 }
1480
1481                 if (of_property_read_u32(np, "pll-out", &val) >= 0) {
1482                         if (val > 6) {
1483                                 dev_err(dev, "Invalid pll-out\n");
1484                                 ret = -EINVAL;
1485                                 goto err_clk;
1486                         }
1487                         pcm512x->pll_out = val;
1488                 }
1489
1490                 if (!pcm512x->pll_in != !pcm512x->pll_out) {
1491                         dev_err(dev,
1492                                 "Error: both pll-in and pll-out, or none\n");
1493                         ret = -EINVAL;
1494                         goto err_clk;
1495                 }
1496                 if (pcm512x->pll_in && pcm512x->pll_in == pcm512x->pll_out) {
1497                         dev_err(dev, "Error: pll-in == pll-out\n");
1498                         ret = -EINVAL;
1499                         goto err_clk;
1500                 }
1501         }
1502 #endif
1503
1504         ret = snd_soc_register_codec(dev, &pcm512x_codec_driver,
1505                                     &pcm512x_dai, 1);
1506         if (ret != 0) {
1507                 dev_err(dev, "Failed to register CODEC: %d\n", ret);
1508                 goto err_pm;
1509         }
1510
1511         return 0;
1512
1513 err_pm:
1514         pm_runtime_disable(dev);
1515 err_clk:
1516         if (!IS_ERR(pcm512x->sclk))
1517                 clk_disable_unprepare(pcm512x->sclk);
1518 err:
1519         regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
1520                                      pcm512x->supplies);
1521         return ret;
1522 }
1523 EXPORT_SYMBOL_GPL(pcm512x_probe);
1524
1525 void pcm512x_remove(struct device *dev)
1526 {
1527         struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
1528
1529         snd_soc_unregister_codec(dev);
1530         pm_runtime_disable(dev);
1531         if (!IS_ERR(pcm512x->sclk))
1532                 clk_disable_unprepare(pcm512x->sclk);
1533         regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
1534                                pcm512x->supplies);
1535 }
1536 EXPORT_SYMBOL_GPL(pcm512x_remove);
1537
1538 #ifdef CONFIG_PM
1539 static int pcm512x_suspend(struct device *dev)
1540 {
1541         struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
1542         int ret;
1543
1544         ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
1545                                  PCM512x_RQPD, PCM512x_RQPD);
1546         if (ret != 0) {
1547                 dev_err(dev, "Failed to request power down: %d\n", ret);
1548                 return ret;
1549         }
1550
1551         ret = regulator_bulk_disable(ARRAY_SIZE(pcm512x->supplies),
1552                                      pcm512x->supplies);
1553         if (ret != 0) {
1554                 dev_err(dev, "Failed to disable supplies: %d\n", ret);
1555                 return ret;
1556         }
1557
1558         if (!IS_ERR(pcm512x->sclk))
1559                 clk_disable_unprepare(pcm512x->sclk);
1560
1561         return 0;
1562 }
1563
1564 static int pcm512x_resume(struct device *dev)
1565 {
1566         struct pcm512x_priv *pcm512x = dev_get_drvdata(dev);
1567         int ret;
1568
1569         if (!IS_ERR(pcm512x->sclk)) {
1570                 ret = clk_prepare_enable(pcm512x->sclk);
1571                 if (ret != 0) {
1572                         dev_err(dev, "Failed to enable SCLK: %d\n", ret);
1573                         return ret;
1574                 }
1575         }
1576
1577         ret = regulator_bulk_enable(ARRAY_SIZE(pcm512x->supplies),
1578                                     pcm512x->supplies);
1579         if (ret != 0) {
1580                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
1581                 return ret;
1582         }
1583
1584         regcache_cache_only(pcm512x->regmap, false);
1585         ret = regcache_sync(pcm512x->regmap);
1586         if (ret != 0) {
1587                 dev_err(dev, "Failed to sync cache: %d\n", ret);
1588                 return ret;
1589         }
1590
1591         ret = regmap_update_bits(pcm512x->regmap, PCM512x_POWER,
1592                                  PCM512x_RQPD, 0);
1593         if (ret != 0) {
1594                 dev_err(dev, "Failed to remove power down: %d\n", ret);
1595                 return ret;
1596         }
1597
1598         return 0;
1599 }
1600 #endif
1601
1602 const struct dev_pm_ops pcm512x_pm_ops = {
1603         SET_RUNTIME_PM_OPS(pcm512x_suspend, pcm512x_resume, NULL)
1604 };
1605 EXPORT_SYMBOL_GPL(pcm512x_pm_ops);
1606
1607 MODULE_DESCRIPTION("ASoC PCM512x codec driver");
1608 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
1609 MODULE_LICENSE("GPL v2");