sound/soc/codecs/tas2552.c

   1 /*
   2  * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
   3  *
   4  * Copyright (C) 2014 Texas Instruments Incorporated -  http://www.ti.com
   5  *
   6  * Author: Dan Murphy <dmurphy@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/errno.h>
  20 #include <linux/device.h>
  21 #include <linux/i2c.h>
  22 #include <linux/gpio.h>
  23 #include <linux/of_gpio.h>
  24 #include <linux/pm_runtime.h>
  25 #include <linux/regmap.h>
  26 #include <linux/slab.h>
  27
  28 #include <linux/gpio/consumer.h>
  29 #include <linux/regulator/consumer.h>
  30
  31 #include <sound/pcm.h>
  32 #include <sound/pcm_params.h>
  33 #include <sound/soc.h>
  34 #include <sound/soc-dapm.h>
  35 #include <sound/tlv.h>
  36 #include <sound/tas2552-plat.h>
  37 #include <dt-bindings/sound/tas2552.h>
  38
  39 #include "tas2552.h"
  40
  41 static const struct reg_default tas2552_reg_defs[] = {
  42         {TAS2552_CFG_1, 0x22},
  43         {TAS2552_CFG_3, 0x80},
  44         {TAS2552_DOUT, 0x00},
  45         {TAS2552_OUTPUT_DATA, 0xc0},
  46         {TAS2552_PDM_CFG, 0x01},
  47         {TAS2552_PGA_GAIN, 0x00},
  48         {TAS2552_BOOST_APT_CTRL, 0x0f},
  49         {TAS2552_RESERVED_0D, 0xbe},
  50         {TAS2552_LIMIT_RATE_HYS, 0x08},
  51         {TAS2552_CFG_2, 0xef},
  52         {TAS2552_SER_CTRL_1, 0x00},
  53         {TAS2552_SER_CTRL_2, 0x00},
  54         {TAS2552_PLL_CTRL_1, 0x10},
  55         {TAS2552_PLL_CTRL_2, 0x00},
  56         {TAS2552_PLL_CTRL_3, 0x00},
  57         {TAS2552_BTIP, 0x8f},
  58         {TAS2552_BTS_CTRL, 0x80},
  59         {TAS2552_LIMIT_RELEASE, 0x04},
  60         {TAS2552_LIMIT_INT_COUNT, 0x00},
  61         {TAS2552_EDGE_RATE_CTRL, 0x40},
  62         {TAS2552_VBAT_DATA, 0x00},
  63 };
  64
  65 #define TAS2552_NUM_SUPPLIES    3
  66 static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
  67         "vbat",         /* vbat voltage */
  68         "iovdd",        /* I/O Voltage */
  69         "avdd",         /* Analog DAC Voltage */
  70 };
  71
  72 struct tas2552_data {
  73         struct snd_soc_codec *codec;
  74         struct regmap *regmap;
  75         struct i2c_client *tas2552_client;
  76         struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
  77         struct gpio_desc *enable_gpio;
  78         unsigned char regs[TAS2552_VBAT_DATA];
  79         unsigned int pll_clkin;
  80         int pll_clk_id;
  81         unsigned int pdm_clk;
  82         int pdm_clk_id;
  83
  84         unsigned int dai_fmt;
  85         unsigned int tdm_delay;
  86 };
  87
  88 static int tas2552_post_event(struct snd_soc_dapm_widget *w,
  89                               struct snd_kcontrol *kcontrol, int event)
  90 {
  91         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
  92
  93         switch (event) {
  94         case SND_SOC_DAPM_POST_PMU:
  95                 snd_soc_write(codec, TAS2552_RESERVED_0D, 0xc0);
  96                 snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5),
  97                                     (1 << 5));
  98                 snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 0);
  99                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS, 0);
 100                 break;
 101         case SND_SOC_DAPM_POST_PMD:
 102                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_SWS,
 103                                     TAS2552_SWS);
 104                 snd_soc_update_bits(codec, TAS2552_CFG_2, 1, 1);
 105                 snd_soc_update_bits(codec, TAS2552_LIMIT_RATE_HYS, (1 << 5), 0);
 106                 snd_soc_write(codec, TAS2552_RESERVED_0D, 0xbe);
 107                 break;
 108         }
 109         return 0;
 110 }
 111
 112 /* Input mux controls */
 113 static const char * const tas2552_input_texts[] = {
 114         "Digital", "Analog" };
 115 static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
 116                             tas2552_input_texts);
 117
 118 static const struct snd_kcontrol_new tas2552_input_mux_control =
 119         SOC_DAPM_ENUM("Route", tas2552_input_mux_enum);
 120
 121 static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
 122 {
 123         SND_SOC_DAPM_INPUT("IN"),
 124
 125         /* MUX Controls */
 126         SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
 127                          &tas2552_input_mux_control),
 128
 129         SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
 130         SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
 131         SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
 132         SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
 133         SND_SOC_DAPM_POST("Post Event", tas2552_post_event),
 134
 135         SND_SOC_DAPM_OUTPUT("OUT")
 136 };
 137
 138 static const struct snd_soc_dapm_route tas2552_audio_map[] = {
 139         {"DAC", NULL, "DAC IN"},
 140         {"Input selection", "Digital", "DAC"},
 141         {"Input selection", "Analog", "IN"},
 142         {"ClassD", NULL, "Input selection"},
 143         {"OUT", NULL, "ClassD"},
 144         {"ClassD", NULL, "PLL"},
 145 };
 146
 147 #ifdef CONFIG_PM
 148 static void tas2552_sw_shutdown(struct tas2552_data *tas2552, int sw_shutdown)
 149 {
 150         u8 cfg1_reg = 0;
 151
 152         if (!tas2552->codec)
 153                 return;
 154
 155         if (sw_shutdown)
 156                 cfg1_reg = TAS2552_SWS;
 157
 158         snd_soc_update_bits(tas2552->codec, TAS2552_CFG_1, TAS2552_SWS,
 159                             cfg1_reg);
 160 }
 161 #endif
 162
 163 static int tas2552_setup_pll(struct snd_soc_codec *codec,
 164                              struct snd_pcm_hw_params *params)
 165 {
 166         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 167         bool bypass_pll = false;
 168         unsigned int pll_clk = params_rate(params) * 512;
 169         unsigned int pll_clkin = tas2552->pll_clkin;
 170         u8 pll_enable;
 171
 172         if (!pll_clkin) {
 173                 if (tas2552->pll_clk_id != TAS2552_PLL_CLKIN_BCLK)
 174                         return -EINVAL;
 175
 176                 pll_clkin = snd_soc_params_to_bclk(params);
 177                 pll_clkin += tas2552->tdm_delay;
 178         }
 179
 180         pll_enable = snd_soc_read(codec, TAS2552_CFG_2) & TAS2552_PLL_ENABLE;
 181         snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
 182
 183         if (pll_clkin == pll_clk)
 184                 bypass_pll = true;
 185
 186         if (bypass_pll) {
 187                 /* By pass the PLL configuration */
 188                 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
 189                                     TAS2552_PLL_BYPASS, TAS2552_PLL_BYPASS);
 190         } else {
 191                 /* Fill in the PLL control registers for J & D
 192                  * pll_clk = (.5 * pll_clkin * J.D) / 2^p
 193                  * Need to fill in J and D here based on incoming freq
 194                  */
 195                 unsigned int d;
 196                 u8 j;
 197                 u8 pll_sel = (tas2552->pll_clk_id << 3) & TAS2552_PLL_SRC_MASK;
 198                 u8 p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
 199
 200                 p = (p >> 7);
 201
 202 recalc:
 203                 j = (pll_clk * 2 * (1 << p)) / pll_clkin;
 204                 d = (pll_clk * 2 * (1 << p)) % pll_clkin;
 205                 d /= (pll_clkin / 10000);
 206
 207                 if (d && (pll_clkin < 512000 || pll_clkin > 9200000)) {
 208                         if (tas2552->pll_clk_id == TAS2552_PLL_CLKIN_BCLK) {
 209                                 pll_clkin = 1800000;
 210                                 pll_sel = (TAS2552_PLL_CLKIN_1_8_FIXED << 3) &
 211                                                         TAS2552_PLL_SRC_MASK;
 212                         } else {
 213                                 pll_clkin = snd_soc_params_to_bclk(params);
 214                                 pll_clkin += tas2552->tdm_delay;
 215                                 pll_sel = (TAS2552_PLL_CLKIN_BCLK << 3) &
 216                                                         TAS2552_PLL_SRC_MASK;
 217                         }
 218                         goto recalc;
 219                 }
 220
 221                 snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_PLL_SRC_MASK,
 222                                     pll_sel);
 223
 224                 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
 225                                     TAS2552_PLL_J_MASK, j);
 226                 /* Will clear the PLL_BYPASS bit */
 227                 snd_soc_write(codec, TAS2552_PLL_CTRL_2,
 228                               TAS2552_PLL_D_UPPER(d));
 229                 snd_soc_write(codec, TAS2552_PLL_CTRL_3,
 230                               TAS2552_PLL_D_LOWER(d));
 231         }
 232
 233         /* Restore PLL status */
 234         snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE,
 235                             pll_enable);
 236
 237         return 0;
 238 }
 239
 240 static int tas2552_hw_params(struct snd_pcm_substream *substream,
 241                              struct snd_pcm_hw_params *params,
 242                              struct snd_soc_dai *dai)
 243 {
 244         struct snd_soc_codec *codec = dai->codec;
 245         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 246         int cpf;
 247         u8 ser_ctrl1_reg, wclk_rate;
 248
 249         switch (params_width(params)) {
 250         case 16:
 251                 ser_ctrl1_reg = TAS2552_WORDLENGTH_16BIT;
 252                 cpf = 32 + tas2552->tdm_delay;
 253                 break;
 254         case 20:
 255                 ser_ctrl1_reg = TAS2552_WORDLENGTH_20BIT;
 256                 cpf = 64 + tas2552->tdm_delay;
 257                 break;
 258         case 24:
 259                 ser_ctrl1_reg = TAS2552_WORDLENGTH_24BIT;
 260                 cpf = 64 + tas2552->tdm_delay;
 261                 break;
 262         case 32:
 263                 ser_ctrl1_reg = TAS2552_WORDLENGTH_32BIT;
 264                 cpf = 64 + tas2552->tdm_delay;
 265                 break;
 266         default:
 267                 dev_err(codec->dev, "Not supported sample size: %d\n",
 268                         params_width(params));
 269                 return -EINVAL;
 270         }
 271
 272         if (cpf <= 32)
 273                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_32;
 274         else if (cpf <= 64)
 275                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_64;
 276         else if (cpf <= 128)
 277                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_128;
 278         else
 279                 ser_ctrl1_reg |= TAS2552_CLKSPERFRAME_256;
 280
 281         snd_soc_update_bits(codec, TAS2552_SER_CTRL_1,
 282                             TAS2552_WORDLENGTH_MASK | TAS2552_CLKSPERFRAME_MASK,
 283                             ser_ctrl1_reg);
 284
 285         switch (params_rate(params)) {
 286         case 8000:
 287                 wclk_rate = TAS2552_WCLK_FREQ_8KHZ;
 288                 break;
 289         case 11025:
 290         case 12000:
 291                 wclk_rate = TAS2552_WCLK_FREQ_11_12KHZ;
 292                 break;
 293         case 16000:
 294                 wclk_rate = TAS2552_WCLK_FREQ_16KHZ;
 295                 break;
 296         case 22050:
 297         case 24000:
 298                 wclk_rate = TAS2552_WCLK_FREQ_22_24KHZ;
 299                 break;
 300         case 32000:
 301                 wclk_rate = TAS2552_WCLK_FREQ_32KHZ;
 302                 break;
 303         case 44100:
 304         case 48000:
 305                 wclk_rate = TAS2552_WCLK_FREQ_44_48KHZ;
 306                 break;
 307         case 88200:
 308         case 96000:
 309                 wclk_rate = TAS2552_WCLK_FREQ_88_96KHZ;
 310                 break;
 311         case 176400:
 312         case 192000:
 313                 wclk_rate = TAS2552_WCLK_FREQ_176_192KHZ;
 314                 break;
 315         default:
 316                 dev_err(codec->dev, "Not supported sample rate: %d\n",
 317                         params_rate(params));
 318                 return -EINVAL;
 319         }
 320
 321         snd_soc_update_bits(codec, TAS2552_CFG_3, TAS2552_WCLK_FREQ_MASK,
 322                             wclk_rate);
 323
 324         return tas2552_setup_pll(codec, params);
 325 }
 326
 327 #define TAS2552_DAI_FMT_MASK    (TAS2552_BCLKDIR | \
 328                                  TAS2552_WCLKDIR | \
 329                                  TAS2552_DATAFORMAT_MASK)
 330 static int tas2552_prepare(struct snd_pcm_substream *substream,
 331                            struct snd_soc_dai *dai)
 332 {
 333         struct snd_soc_codec *codec = dai->codec;
 334         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 335         int delay = 0;
 336
 337         /* TDM slot selection only valid in DSP_A/_B mode */
 338         if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_A)
 339                 delay += (tas2552->tdm_delay + 1);
 340         else if (tas2552->dai_fmt == SND_SOC_DAIFMT_DSP_B)
 341                 delay += tas2552->tdm_delay;
 342
 343         /* Configure data delay */
 344         snd_soc_write(codec, TAS2552_SER_CTRL_2, delay);
 345
 346         return 0;
 347 }
 348
 349 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 350 {
 351         struct snd_soc_codec *codec = dai->codec;
 352         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 353         u8 serial_format;
 354
 355         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 356         case SND_SOC_DAIFMT_CBS_CFS:
 357                 serial_format = 0x00;
 358                 break;
 359         case SND_SOC_DAIFMT_CBS_CFM:
 360                 serial_format = TAS2552_WCLKDIR;
 361                 break;
 362         case SND_SOC_DAIFMT_CBM_CFS:
 363                 serial_format = TAS2552_BCLKDIR;
 364                 break;
 365         case SND_SOC_DAIFMT_CBM_CFM:
 366                 serial_format = (TAS2552_BCLKDIR | TAS2552_WCLKDIR);
 367                 break;
 368         default:
 369                 dev_vdbg(codec->dev, "DAI Format master is not found\n");
 370                 return -EINVAL;
 371         }
 372
 373         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
 374                        SND_SOC_DAIFMT_INV_MASK)) {
 375         case (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF):
 376                 break;
 377         case (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF):
 378         case (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF):
 379                 serial_format |= TAS2552_DATAFORMAT_DSP;
 380                 break;
 381         case (SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_NB_NF):
 382                 serial_format |= TAS2552_DATAFORMAT_RIGHT_J;
 383                 break;
 384         case (SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF):
 385                 serial_format |= TAS2552_DATAFORMAT_LEFT_J;
 386                 break;
 387         default:
 388                 dev_vdbg(codec->dev, "DAI Format is not found\n");
 389                 return -EINVAL;
 390         }
 391         tas2552->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 392
 393         snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, TAS2552_DAI_FMT_MASK,
 394                             serial_format);
 395         return 0;
 396 }
 397
 398 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
 399                                   unsigned int freq, int dir)
 400 {
 401         struct snd_soc_codec *codec = dai->codec;
 402         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 403         u8 reg, mask, val;
 404
 405         switch (clk_id) {
 406         case TAS2552_PLL_CLKIN_MCLK:
 407         case TAS2552_PLL_CLKIN_IVCLKIN:
 408                 if (freq < 512000 || freq > 24576000) {
 409                         /* out of range PLL_CLKIN, fall back to use BCLK */
 410                         dev_warn(codec->dev, "Out of range PLL_CLKIN: %u\n",
 411                                  freq);
 412                         clk_id = TAS2552_PLL_CLKIN_BCLK;
 413                         freq = 0;
 414                 }
 415                 /* fall through */
 416         case TAS2552_PLL_CLKIN_BCLK:
 417         case TAS2552_PLL_CLKIN_1_8_FIXED:
 418                 mask = TAS2552_PLL_SRC_MASK;
 419                 val = (clk_id << 3) & mask; /* bit 4:5 in the register */
 420                 reg = TAS2552_CFG_1;
 421                 tas2552->pll_clk_id = clk_id;
 422                 tas2552->pll_clkin = freq;
 423                 break;
 424         case TAS2552_PDM_CLK_PLL:
 425         case TAS2552_PDM_CLK_IVCLKIN:
 426         case TAS2552_PDM_CLK_BCLK:
 427         case TAS2552_PDM_CLK_MCLK:
 428                 mask = TAS2552_PDM_CLK_SEL_MASK;
 429                 val = (clk_id >> 1) & mask; /* bit 0:1 in the register */
 430                 reg = TAS2552_PDM_CFG;
 431                 tas2552->pdm_clk_id = clk_id;
 432                 tas2552->pdm_clk = freq;
 433                 break;
 434         default:
 435                 dev_err(codec->dev, "Invalid clk id: %d\n", clk_id);
 436                 return -EINVAL;
 437         }
 438
 439         snd_soc_update_bits(codec, reg, mask, val);
 440
 441         return 0;
 442 }
 443
 444 static int tas2552_set_dai_tdm_slot(struct snd_soc_dai *dai,
 445                                     unsigned int tx_mask, unsigned int rx_mask,
 446                                     int slots, int slot_width)
 447 {
 448         struct snd_soc_codec *codec = dai->codec;
 449         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 450         unsigned int lsb;
 451
 452         if (unlikely(!tx_mask)) {
 453                 dev_err(codec->dev, "tx masks need to be non 0\n");
 454                 return -EINVAL;
 455         }
 456
 457         /* TDM based on DSP mode requires slots to be adjacent */
 458         lsb = __ffs(tx_mask);
 459         if ((lsb + 1) != __fls(tx_mask)) {
 460                 dev_err(codec->dev, "Invalid mask, slots must be adjacent\n");
 461                 return -EINVAL;
 462         }
 463
 464         tas2552->tdm_delay = lsb * slot_width;
 465
 466         /* DOUT in high-impedance on inactive bit clocks */
 467         snd_soc_update_bits(codec, TAS2552_DOUT,
 468                             TAS2552_SDOUT_TRISTATE, TAS2552_SDOUT_TRISTATE);
 469
 470         return 0;
 471 }
 472
 473 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
 474 {
 475         u8 cfg1_reg = 0;
 476         struct snd_soc_codec *codec = dai->codec;
 477
 478         if (mute)
 479                 cfg1_reg |= TAS2552_MUTE;
 480
 481         snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, cfg1_reg);
 482
 483         return 0;
 484 }
 485
 486 #ifdef CONFIG_PM
 487 static int tas2552_runtime_suspend(struct device *dev)
 488 {
 489         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
 490
 491         tas2552_sw_shutdown(tas2552, 1);
 492
 493         regcache_cache_only(tas2552->regmap, true);
 494         regcache_mark_dirty(tas2552->regmap);
 495
 496         gpiod_set_value(tas2552->enable_gpio, 0);
 497
 498         return 0;
 499 }
 500
 501 static int tas2552_runtime_resume(struct device *dev)
 502 {
 503         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
 504
 505         gpiod_set_value(tas2552->enable_gpio, 1);
 506
 507         tas2552_sw_shutdown(tas2552, 0);
 508
 509         regcache_cache_only(tas2552->regmap, false);
 510         regcache_sync(tas2552->regmap);
 511
 512         return 0;
 513 }
 514 #endif
 515
 516 static const struct dev_pm_ops tas2552_pm = {
 517         SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
 518                            NULL)
 519 };
 520
 521 static const struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
 522         .hw_params      = tas2552_hw_params,
 523         .prepare        = tas2552_prepare,
 524         .set_sysclk     = tas2552_set_dai_sysclk,
 525         .set_fmt        = tas2552_set_dai_fmt,
 526         .set_tdm_slot   = tas2552_set_dai_tdm_slot,
 527         .digital_mute = tas2552_mute,
 528 };
 529
 530 /* Formats supported by TAS2552 driver. */
 531 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 532                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 533
 534 /* TAS2552 dai structure. */
 535 static struct snd_soc_dai_driver tas2552_dai[] = {
 536         {
 537                 .name = "tas2552-amplifier",
 538                 .playback = {
 539                         .stream_name = "Playback",
 540                         .channels_min = 2,
 541                         .channels_max = 2,
 542                         .rates = SNDRV_PCM_RATE_8000_192000,
 543                         .formats = TAS2552_FORMATS,
 544                 },
 545                 .ops = &tas2552_speaker_dai_ops,
 546         },
 547 };
 548
 549 /*
 550  * DAC digital volumes. From -7 to 24 dB in 1 dB steps
 551  */
 552 static DECLARE_TLV_DB_SCALE(dac_tlv, -700, 100, 0);
 553
 554 static const char * const tas2552_din_source_select[] = {
 555         "Muted",
 556         "Left",
 557         "Right",
 558         "Left + Right average",
 559 };
 560 static SOC_ENUM_SINGLE_DECL(tas2552_din_source_enum,
 561                             TAS2552_CFG_3, 3,
 562                             tas2552_din_source_select);
 563
 564 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
 565         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
 566                          TAS2552_PGA_GAIN, 0, 0x1f, 0, dac_tlv),
 567         SOC_ENUM("DIN source", tas2552_din_source_enum),
 568 };
 569
 570 static int tas2552_codec_probe(struct snd_soc_codec *codec)
 571 {
 572         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 573         int ret;
 574
 575         tas2552->codec = codec;
 576
 577         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
 578                                     tas2552->supplies);
 579
 580         if (ret != 0) {
 581                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
 582                         ret);
 583                 return ret;
 584         }
 585
 586         gpiod_set_value(tas2552->enable_gpio, 1);
 587
 588         ret = pm_runtime_get_sync(codec->dev);
 589         if (ret < 0) {
 590                 dev_err(codec->dev, "Enabling device failed: %d\n",
 591                         ret);
 592                 goto probe_fail;
 593         }
 594
 595         snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE, TAS2552_MUTE);
 596         snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
 597                                             TAS2552_DIN_SRC_SEL_AVG_L_R);
 598         snd_soc_write(codec, TAS2552_OUTPUT_DATA,
 599                       TAS2552_PDM_DATA_SEL_V_I |
 600                       TAS2552_R_DATA_OUT(TAS2552_DATA_OUT_V_DATA));
 601         snd_soc_write(codec, TAS2552_BOOST_APT_CTRL, TAS2552_APT_DELAY_200 |
 602                                                      TAS2552_APT_THRESH_20_17);
 603
 604         snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN | TAS2552_APT_EN |
 605                                             TAS2552_LIM_EN);
 606
 607         return 0;
 608
 609 probe_fail:
 610         gpiod_set_value(tas2552->enable_gpio, 0);
 611
 612         regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
 613                                         tas2552->supplies);
 614         return -EIO;
 615 }
 616
 617 static int tas2552_codec_remove(struct snd_soc_codec *codec)
 618 {
 619         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 620
 621         pm_runtime_put(codec->dev);
 622
 623         gpiod_set_value(tas2552->enable_gpio, 0);
 624
 625         return 0;
 626 };
 627
 628 #ifdef CONFIG_PM
 629 static int tas2552_suspend(struct snd_soc_codec *codec)
 630 {
 631         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 632         int ret;
 633
 634         ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
 635                                         tas2552->supplies);
 636
 637         if (ret != 0)
 638                 dev_err(codec->dev, "Failed to disable supplies: %d\n",
 639                         ret);
 640         return 0;
 641 }
 642
 643 static int tas2552_resume(struct snd_soc_codec *codec)
 644 {
 645         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 646         int ret;
 647
 648         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
 649                                     tas2552->supplies);
 650
 651         if (ret != 0) {
 652                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
 653                         ret);
 654         }
 655
 656         return 0;
 657 }
 658 #else
 659 #define tas2552_suspend NULL
 660 #define tas2552_resume NULL
 661 #endif
 662
 663 static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
 664         .probe = tas2552_codec_probe,
 665         .remove = tas2552_codec_remove,
 666         .suspend =      tas2552_suspend,
 667         .resume = tas2552_resume,
 668         .ignore_pmdown_time = true,
 669
 670         .controls = tas2552_snd_controls,
 671         .num_controls = ARRAY_SIZE(tas2552_snd_controls),
 672         .dapm_widgets = tas2552_dapm_widgets,
 673         .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
 674         .dapm_routes = tas2552_audio_map,
 675         .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
 676 };
 677
 678 static const struct regmap_config tas2552_regmap_config = {
 679         .reg_bits = 8,
 680         .val_bits = 8,
 681
 682         .max_register = TAS2552_MAX_REG,
 683         .reg_defaults = tas2552_reg_defs,
 684         .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
 685         .cache_type = REGCACHE_RBTREE,
 686 };
 687
 688 static int tas2552_probe(struct i2c_client *client,
 689                            const struct i2c_device_id *id)
 690 {
 691         struct device *dev;
 692         struct tas2552_data *data;
 693         int ret;
 694         int i;
 695
 696         dev = &client->dev;
 697         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
 698         if (data == NULL)
 699                 return -ENOMEM;
 700
 701         data->enable_gpio = devm_gpiod_get_optional(dev, "enable",
 702                                                     GPIOD_OUT_LOW);
 703         if (IS_ERR(data->enable_gpio))
 704                 return PTR_ERR(data->enable_gpio);
 705
 706         data->tas2552_client = client;
 707         data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
 708         if (IS_ERR(data->regmap)) {
 709                 ret = PTR_ERR(data->regmap);
 710                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
 711                         ret);
 712                 return ret;
 713         }
 714
 715         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
 716                 data->supplies[i].supply = tas2552_supply_names[i];
 717
 718         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
 719                                       data->supplies);
 720         if (ret != 0) {
 721                 dev_err(dev, "Failed to request supplies: %d\n", ret);
 722                 return ret;
 723         }
 724
 725         pm_runtime_set_active(&client->dev);
 726         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
 727         pm_runtime_use_autosuspend(&client->dev);
 728         pm_runtime_enable(&client->dev);
 729         pm_runtime_mark_last_busy(&client->dev);
 730         pm_runtime_put_sync_autosuspend(&client->dev);
 731
 732         dev_set_drvdata(&client->dev, data);
 733
 734         ret = snd_soc_register_codec(&client->dev,
 735                                       &soc_codec_dev_tas2552,
 736                                       tas2552_dai, ARRAY_SIZE(tas2552_dai));
 737         if (ret < 0)
 738                 dev_err(&client->dev, "Failed to register codec: %d\n", ret);
 739
 740         return ret;
 741 }
 742
 743 static int tas2552_i2c_remove(struct i2c_client *client)
 744 {
 745         snd_soc_unregister_codec(&client->dev);
 746         pm_runtime_disable(&client->dev);
 747         return 0;
 748 }
 749
 750 static const struct i2c_device_id tas2552_id[] = {
 751         { "tas2552", 0 },
 752         { }
 753 };
 754 MODULE_DEVICE_TABLE(i2c, tas2552_id);
 755
 756 #if IS_ENABLED(CONFIG_OF)
 757 static const struct of_device_id tas2552_of_match[] = {
 758         { .compatible = "ti,tas2552", },
 759         {},
 760 };
 761 MODULE_DEVICE_TABLE(of, tas2552_of_match);
 762 #endif
 763
 764 static struct i2c_driver tas2552_i2c_driver = {
 765         .driver = {
 766                 .name = "tas2552",
 767                 .of_match_table = of_match_ptr(tas2552_of_match),
 768                 .pm = &tas2552_pm,
 769         },
 770         .probe = tas2552_probe,
 771         .remove = tas2552_i2c_remove,
 772         .id_table = tas2552_id,
 773 };
 774
 775 module_i2c_driver(tas2552_i2c_driver);
 776
 777 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
 778 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
 779 MODULE_LICENSE("GPL");