kernel/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
  38 #include "tas2552.h"
  39
  40 static struct reg_default tas2552_reg_defs[] = {
  41         {TAS2552_CFG_1, 0x22},
  42         {TAS2552_CFG_3, 0x80},
  43         {TAS2552_DOUT, 0x00},
  44         {TAS2552_OUTPUT_DATA, 0xc0},
  45         {TAS2552_PDM_CFG, 0x01},
  46         {TAS2552_PGA_GAIN, 0x00},
  47         {TAS2552_BOOST_PT_CTRL, 0x0f},
  48         {TAS2552_RESERVED_0D, 0x00},
  49         {TAS2552_LIMIT_RATE_HYS, 0x08},
  50         {TAS2552_CFG_2, 0xef},
  51         {TAS2552_SER_CTRL_1, 0x00},
  52         {TAS2552_SER_CTRL_2, 0x00},
  53         {TAS2552_PLL_CTRL_1, 0x10},
  54         {TAS2552_PLL_CTRL_2, 0x00},
  55         {TAS2552_PLL_CTRL_3, 0x00},
  56         {TAS2552_BTIP, 0x8f},
  57         {TAS2552_BTS_CTRL, 0x80},
  58         {TAS2552_LIMIT_RELEASE, 0x04},
  59         {TAS2552_LIMIT_INT_COUNT, 0x00},
  60         {TAS2552_EDGE_RATE_CTRL, 0x40},
  61         {TAS2552_VBAT_DATA, 0x00},
  62 };
  63
  64 #define TAS2552_NUM_SUPPLIES    3
  65 static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
  66         "vbat",         /* vbat voltage */
  67         "iovdd",        /* I/O Voltage */
  68         "avdd",         /* Analog DAC Voltage */
  69 };
  70
  71 struct tas2552_data {
  72         struct snd_soc_codec *codec;
  73         struct regmap *regmap;
  74         struct i2c_client *tas2552_client;
  75         struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
  76         struct gpio_desc *enable_gpio;
  77         unsigned char regs[TAS2552_VBAT_DATA];
  78         unsigned int mclk;
  79 };
  80
  81 /* Input mux controls */
  82 static const char *tas2552_input_texts[] = {
  83         "Digital", "Analog"
  84 };
  85
  86 static SOC_ENUM_SINGLE_DECL(tas2552_input_mux_enum, TAS2552_CFG_3, 7,
  87                             tas2552_input_texts);
  88
  89 static const struct snd_kcontrol_new tas2552_input_mux_control[] = {
  90         SOC_DAPM_ENUM("Input selection", tas2552_input_mux_enum)
  91 };
  92
  93 static const struct snd_soc_dapm_widget tas2552_dapm_widgets[] =
  94 {
  95         SND_SOC_DAPM_INPUT("IN"),
  96
  97         /* MUX Controls */
  98         SND_SOC_DAPM_MUX("Input selection", SND_SOC_NOPM, 0, 0,
  99                                 tas2552_input_mux_control),
 100
 101         SND_SOC_DAPM_AIF_IN("DAC IN", "DAC Playback", 0, SND_SOC_NOPM, 0, 0),
 102         SND_SOC_DAPM_DAC("DAC", NULL, SND_SOC_NOPM, 0, 0),
 103         SND_SOC_DAPM_OUT_DRV("ClassD", TAS2552_CFG_2, 7, 0, NULL, 0),
 104         SND_SOC_DAPM_SUPPLY("PLL", TAS2552_CFG_2, 3, 0, NULL, 0),
 105
 106         SND_SOC_DAPM_OUTPUT("OUT")
 107 };
 108
 109 static const struct snd_soc_dapm_route tas2552_audio_map[] = {
 110         {"DAC", NULL, "DAC IN"},
 111         {"Input selection", "Digital", "DAC"},
 112         {"Input selection", "Analog", "IN"},
 113         {"ClassD", NULL, "Input selection"},
 114         {"OUT", NULL, "ClassD"},
 115         {"ClassD", NULL, "PLL"},
 116 };
 117
 118 #ifdef CONFIG_PM
 119 static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
 120 {
 121         u8 cfg1_reg;
 122
 123         if (sw_shutdown)
 124                 cfg1_reg = 0;
 125         else
 126                 cfg1_reg = TAS2552_SWS_MASK;
 127
 128         snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
 129                                                  TAS2552_SWS_MASK, cfg1_reg);
 130 }
 131 #endif
 132
 133 static int tas2552_hw_params(struct snd_pcm_substream *substream,
 134                              struct snd_pcm_hw_params *params,
 135                              struct snd_soc_dai *dai)
 136 {
 137         struct snd_soc_codec *codec = dai->codec;
 138         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 139         int sample_rate, pll_clk;
 140         int d;
 141         u8 p, j;
 142
 143         if (!tas2552->mclk)
 144                 return -EINVAL;
 145
 146         snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
 147
 148         if (tas2552->mclk == TAS2552_245MHZ_CLK ||
 149                 tas2552->mclk == TAS2552_225MHZ_CLK) {
 150                 /* By pass the PLL configuration */
 151                 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
 152                                     TAS2552_PLL_BYPASS_MASK,
 153                                     TAS2552_PLL_BYPASS);
 154         } else {
 155                 /* Fill in the PLL control registers for J & D
 156                  * PLL_CLK = (.5 * freq * J.D) / 2^p
 157                  * Need to fill in J and D here based on incoming freq
 158                  */
 159                 p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
 160                 p = (p >> 7);
 161                 sample_rate = params_rate(params);
 162
 163                 if (sample_rate == 48000)
 164                         pll_clk = TAS2552_245MHZ_CLK;
 165                 else if (sample_rate == 44100)
 166                         pll_clk = TAS2552_225MHZ_CLK;
 167                 else {
 168                         dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
 169                                         params_rate(params));
 170                         return -EINVAL;
 171                 }
 172
 173                 j = (pll_clk * 2 * (1 << p)) / tas2552->mclk;
 174                 d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;
 175
 176                 snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
 177                                 TAS2552_PLL_J_MASK, j);
 178                 snd_soc_write(codec, TAS2552_PLL_CTRL_2,
 179                                         (d >> 7) & TAS2552_PLL_D_UPPER_MASK);
 180                 snd_soc_write(codec, TAS2552_PLL_CTRL_3,
 181                                 d & TAS2552_PLL_D_LOWER_MASK);
 182
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 189 {
 190         struct snd_soc_codec *codec = dai->codec;
 191         u8 serial_format;
 192         u8 serial_control_mask;
 193
 194         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 195         case SND_SOC_DAIFMT_CBS_CFS:
 196                 serial_format = 0x00;
 197                 break;
 198         case SND_SOC_DAIFMT_CBS_CFM:
 199                 serial_format = TAS2552_WORD_CLK_MASK;
 200                 break;
 201         case SND_SOC_DAIFMT_CBM_CFS:
 202                 serial_format = TAS2552_BIT_CLK_MASK;
 203                 break;
 204         case SND_SOC_DAIFMT_CBM_CFM:
 205                 serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);
 206                 break;
 207         default:
 208                 dev_vdbg(codec->dev, "DAI Format master is not found\n");
 209                 return -EINVAL;
 210         }
 211
 212         serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK;
 213
 214         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 215         case SND_SOC_DAIFMT_I2S:
 216                 serial_format &= TAS2552_DAIFMT_I2S_MASK;
 217                 break;
 218         case SND_SOC_DAIFMT_DSP_A:
 219                 serial_format |= TAS2552_DAIFMT_DSP;
 220                 break;
 221         case SND_SOC_DAIFMT_RIGHT_J:
 222                 serial_format |= TAS2552_DAIFMT_RIGHT_J;
 223                 break;
 224         case SND_SOC_DAIFMT_LEFT_J:
 225                 serial_format |= TAS2552_DAIFMT_LEFT_J;
 226                 break;
 227         default:
 228                 dev_vdbg(codec->dev, "DAI Format is not found\n");
 229                 return -EINVAL;
 230         }
 231
 232         if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
 233                 serial_control_mask |= TAS2552_DATA_FORMAT_MASK;
 234
 235         snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask,
 236                                                 serial_format);
 237
 238         return 0;
 239 }
 240
 241 static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
 242                                   unsigned int freq, int dir)
 243 {
 244         struct snd_soc_codec *codec = dai->codec;
 245         struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
 246
 247         tas2552->mclk = freq;
 248
 249         return 0;
 250 }
 251
 252 static int tas2552_mute(struct snd_soc_dai *dai, int mute)
 253 {
 254         u8 cfg1_reg;
 255         struct snd_soc_codec *codec = dai->codec;
 256
 257         if (mute)
 258                 cfg1_reg = TAS2552_MUTE_MASK;
 259         else
 260                 cfg1_reg = ~TAS2552_MUTE_MASK;
 261
 262         snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);
 263
 264         return 0;
 265 }
 266
 267 #ifdef CONFIG_PM
 268 static int tas2552_runtime_suspend(struct device *dev)
 269 {
 270         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
 271
 272         tas2552_sw_shutdown(tas2552, 0);
 273
 274         regcache_cache_only(tas2552->regmap, true);
 275         regcache_mark_dirty(tas2552->regmap);
 276
 277         if (tas2552->enable_gpio)
 278                 gpiod_set_value(tas2552->enable_gpio, 0);
 279
 280         return 0;
 281 }
 282
 283 static int tas2552_runtime_resume(struct device *dev)
 284 {
 285         struct tas2552_data *tas2552 = dev_get_drvdata(dev);
 286
 287         if (tas2552->enable_gpio)
 288                 gpiod_set_value(tas2552->enable_gpio, 1);
 289
 290         tas2552_sw_shutdown(tas2552, 1);
 291
 292         regcache_cache_only(tas2552->regmap, false);
 293         regcache_sync(tas2552->regmap);
 294
 295         return 0;
 296 }
 297 #endif
 298
 299 static const struct dev_pm_ops tas2552_pm = {
 300         SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
 301                            NULL)
 302 };
 303
 304 static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
 305         .hw_params      = tas2552_hw_params,
 306         .set_sysclk     = tas2552_set_dai_sysclk,
 307         .set_fmt        = tas2552_set_dai_fmt,
 308         .digital_mute = tas2552_mute,
 309 };
 310
 311 /* Formats supported by TAS2552 driver. */
 312 #define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 313                          SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 314
 315 /* TAS2552 dai structure. */
 316 static struct snd_soc_dai_driver tas2552_dai[] = {
 317         {
 318                 .name = "tas2552-amplifier",
 319                 .playback = {
 320                         .stream_name = "Playback",
 321                         .channels_min = 2,
 322                         .channels_max = 2,
 323                         .rates = SNDRV_PCM_RATE_8000_192000,
 324                         .formats = TAS2552_FORMATS,
 325                 },
 326                 .ops = &tas2552_speaker_dai_ops,
 327         },
 328 };
 329
 330 /*
 331  * DAC digital volumes. From -7 to 24 dB in 1 dB steps
 332  */
 333 static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24);
 334
 335 static const struct snd_kcontrol_new tas2552_snd_controls[] = {
 336         SOC_SINGLE_TLV("Speaker Driver Playback Volume",
 337                          TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
 338         SOC_DAPM_SINGLE("Playback AMP", SND_SOC_NOPM, 0, 1, 0),
 339 };
 340
 341 static const struct reg_default tas2552_init_regs[] = {
 342         { TAS2552_RESERVED_0D, 0xc0 },
 343 };
 344
 345 static int tas2552_codec_probe(struct snd_soc_codec *codec)
 346 {
 347         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 348         int ret;
 349
 350         tas2552->codec = codec;
 351
 352         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
 353                                     tas2552->supplies);
 354
 355         if (ret != 0) {
 356                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
 357                         ret);
 358                 return ret;
 359         }
 360
 361         if (tas2552->enable_gpio)
 362                 gpiod_set_value(tas2552->enable_gpio, 1);
 363
 364         ret = pm_runtime_get_sync(codec->dev);
 365         if (ret < 0) {
 366                 dev_err(codec->dev, "Enabling device failed: %d\n",
 367                         ret);
 368                 goto probe_fail;
 369         }
 370
 371         snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK |
 372                                 TAS2552_PLL_SRC_BCLK);
 373         snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
 374                                 TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ);
 375         snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
 376         snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8);
 377         snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL);
 378         snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
 379                                 TAS2552_APT_THRESH_2_1_7);
 380
 381         ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
 382                                             ARRAY_SIZE(tas2552_init_regs));
 383         if (ret != 0) {
 384                 dev_err(codec->dev, "Failed to write init registers: %d\n",
 385                         ret);
 386                 goto patch_fail;
 387         }
 388
 389         snd_soc_write(codec, TAS2552_CFG_2, TAS2552_BOOST_EN |
 390                                   TAS2552_APT_EN | TAS2552_LIM_EN);
 391
 392         return 0;
 393
 394 patch_fail:
 395         pm_runtime_put(codec->dev);
 396 probe_fail:
 397         if (tas2552->enable_gpio)
 398                 gpiod_set_value(tas2552->enable_gpio, 0);
 399
 400         regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
 401                                         tas2552->supplies);
 402         return -EIO;
 403 }
 404
 405 static int tas2552_codec_remove(struct snd_soc_codec *codec)
 406 {
 407         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 408
 409         pm_runtime_put(codec->dev);
 410
 411         if (tas2552->enable_gpio)
 412                 gpiod_set_value(tas2552->enable_gpio, 0);
 413
 414         return 0;
 415 };
 416
 417 #ifdef CONFIG_PM
 418 static int tas2552_suspend(struct snd_soc_codec *codec)
 419 {
 420         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 421         int ret;
 422
 423         ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
 424                                         tas2552->supplies);
 425
 426         if (ret != 0)
 427                 dev_err(codec->dev, "Failed to disable supplies: %d\n",
 428                         ret);
 429         return 0;
 430 }
 431
 432 static int tas2552_resume(struct snd_soc_codec *codec)
 433 {
 434         struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
 435         int ret;
 436
 437         ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
 438                                     tas2552->supplies);
 439
 440         if (ret != 0) {
 441                 dev_err(codec->dev, "Failed to enable supplies: %d\n",
 442                         ret);
 443         }
 444
 445         return 0;
 446 }
 447 #else
 448 #define tas2552_suspend NULL
 449 #define tas2552_resume NULL
 450 #endif
 451
 452 static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
 453         .probe = tas2552_codec_probe,
 454         .remove = tas2552_codec_remove,
 455         .suspend =      tas2552_suspend,
 456         .resume = tas2552_resume,
 457         .controls = tas2552_snd_controls,
 458         .num_controls = ARRAY_SIZE(tas2552_snd_controls),
 459         .dapm_widgets = tas2552_dapm_widgets,
 460         .num_dapm_widgets = ARRAY_SIZE(tas2552_dapm_widgets),
 461         .dapm_routes = tas2552_audio_map,
 462         .num_dapm_routes = ARRAY_SIZE(tas2552_audio_map),
 463 };
 464
 465 static const struct regmap_config tas2552_regmap_config = {
 466         .reg_bits = 8,
 467         .val_bits = 8,
 468
 469         .max_register = TAS2552_MAX_REG,
 470         .reg_defaults = tas2552_reg_defs,
 471         .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
 472         .cache_type = REGCACHE_RBTREE,
 473 };
 474
 475 static int tas2552_probe(struct i2c_client *client,
 476                            const struct i2c_device_id *id)
 477 {
 478         struct device *dev;
 479         struct tas2552_data *data;
 480         int ret;
 481         int i;
 482
 483         dev = &client->dev;
 484         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
 485         if (data == NULL)
 486                 return -ENOMEM;
 487
 488         data->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 489         if (IS_ERR(data->enable_gpio))
 490                 return PTR_ERR(data->enable_gpio);
 491
 492         data->tas2552_client = client;
 493         data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
 494         if (IS_ERR(data->regmap)) {
 495                 ret = PTR_ERR(data->regmap);
 496                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
 497                         ret);
 498                 return ret;
 499         }
 500
 501         for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
 502                 data->supplies[i].supply = tas2552_supply_names[i];
 503
 504         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
 505                                       data->supplies);
 506         if (ret != 0) {
 507                 dev_err(dev, "Failed to request supplies: %d\n", ret);
 508                 return ret;
 509         }
 510
 511         pm_runtime_set_active(&client->dev);
 512         pm_runtime_set_autosuspend_delay(&client->dev, 1000);
 513         pm_runtime_use_autosuspend(&client->dev);
 514         pm_runtime_enable(&client->dev);
 515         pm_runtime_mark_last_busy(&client->dev);
 516         pm_runtime_put_sync_autosuspend(&client->dev);
 517
 518         dev_set_drvdata(&client->dev, data);
 519
 520         ret = snd_soc_register_codec(&client->dev,
 521                                       &soc_codec_dev_tas2552,
 522                                       tas2552_dai, ARRAY_SIZE(tas2552_dai));
 523         if (ret < 0)
 524                 dev_err(&client->dev, "Failed to register codec: %d\n", ret);
 525
 526         return ret;
 527 }
 528
 529 static int tas2552_i2c_remove(struct i2c_client *client)
 530 {
 531         snd_soc_unregister_codec(&client->dev);
 532         return 0;
 533 }
 534
 535 static const struct i2c_device_id tas2552_id[] = {
 536         { "tas2552", 0 },
 537         { }
 538 };
 539 MODULE_DEVICE_TABLE(i2c, tas2552_id);
 540
 541 #if IS_ENABLED(CONFIG_OF)
 542 static const struct of_device_id tas2552_of_match[] = {
 543         { .compatible = "ti,tas2552", },
 544         {},
 545 };
 546 MODULE_DEVICE_TABLE(of, tas2552_of_match);
 547 #endif
 548
 549 static struct i2c_driver tas2552_i2c_driver = {
 550         .driver = {
 551                 .name = "tas2552",
 552                 .owner = THIS_MODULE,
 553                 .of_match_table = of_match_ptr(tas2552_of_match),
 554                 .pm = &tas2552_pm,
 555         },
 556         .probe = tas2552_probe,
 557         .remove = tas2552_i2c_remove,
 558         .id_table = tas2552_id,
 559 };
 560
 561 module_i2c_driver(tas2552_i2c_driver);
 562
 563 MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
 564 MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
 565 MODULE_LICENSE("GPL");