sound/soc/codecs/max98363.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 // Copyright (c) 2022, Analog Devices Inc.
   3
   4 #include <linux/module.h>
   5 #include <linux/pm_runtime.h>
   6 #include <linux/regmap.h>
   7 #include <linux/soundwire/sdw.h>
   8 #include <linux/soundwire/sdw_registers.h>
   9 #include <linux/soundwire/sdw_type.h>
  10 #include <sound/pcm.h>
  11 #include <sound/pcm_params.h>
  12 #include <sound/soc.h>
  13 #include <sound/tlv.h>
  14
  15 #include "max98363.h"
  16
  17 static struct reg_default max98363_reg[] = {
  18         {MAX98363_R2021_ERR_MON_CTRL, 0x0},
  19         {MAX98363_R2022_SPK_MON_THRESH, 0x0},
  20         {MAX98363_R2023_SPK_MON_DURATION, 0x0},
  21         {MAX98363_R2030_TONE_GEN_CFG, 0x0},
  22         {MAX98363_R203F_TONE_GEN_EN, 0x0},
  23         {MAX98363_R2040_AMP_VOL, 0x0},
  24         {MAX98363_R2041_AMP_GAIN, 0x5},
  25         {MAX98363_R2042_DSP_CFG, 0x0},
  26 };
  27
  28 static bool max98363_readable_register(struct device *dev, unsigned int reg)
  29 {
  30         switch (reg) {
  31         case MAX98363_R2001_INTR_RAW:
  32         case MAX98363_R2003_INTR_STATE:
  33         case MAX98363_R2005_INTR_FALG:
  34         case MAX98363_R2007_INTR_EN:
  35         case MAX98363_R2009_INTR_CLR:
  36         case MAX98363_R2021_ERR_MON_CTRL ... MAX98363_R2023_SPK_MON_DURATION:
  37         case MAX98363_R2030_TONE_GEN_CFG:
  38         case MAX98363_R203F_TONE_GEN_EN:
  39         case MAX98363_R2040_AMP_VOL:
  40         case MAX98363_R2041_AMP_GAIN:
  41         case MAX98363_R2042_DSP_CFG:
  42         case MAX98363_R21FF_REV_ID:
  43                 return true;
  44         default:
  45                 return false;
  46         }
  47 };
  48
  49 static bool max98363_volatile_reg(struct device *dev, unsigned int reg)
  50 {
  51         switch (reg) {
  52         case MAX98363_R2001_INTR_RAW:
  53         case MAX98363_R2003_INTR_STATE:
  54         case MAX98363_R2005_INTR_FALG:
  55         case MAX98363_R2007_INTR_EN:
  56         case MAX98363_R2009_INTR_CLR:
  57         case MAX98363_R21FF_REV_ID:
  58                 return true;
  59         default:
  60                 return false;
  61         }
  62 }
  63
  64 static const struct regmap_config max98363_sdw_regmap = {
  65         .reg_bits = 32,
  66         .val_bits = 8,
  67         .max_register = MAX98363_R21FF_REV_ID,
  68         .reg_defaults  = max98363_reg,
  69         .num_reg_defaults = ARRAY_SIZE(max98363_reg),
  70         .readable_reg = max98363_readable_register,
  71         .volatile_reg = max98363_volatile_reg,
  72         .cache_type = REGCACHE_RBTREE,
  73         .use_single_read = true,
  74         .use_single_write = true,
  75 };
  76
  77 static int max98363_suspend(struct device *dev)
  78 {
  79         struct max98363_priv *max98363 = dev_get_drvdata(dev);
  80
  81         regcache_cache_only(max98363->regmap, true);
  82         regcache_mark_dirty(max98363->regmap);
  83
  84         return 0;
  85 }
  86
  87 #define MAX98363_PROBE_TIMEOUT 5000
  88
  89 static int max98363_resume(struct device *dev)
  90 {
  91         struct sdw_slave *slave = dev_to_sdw_dev(dev);
  92         struct max98363_priv *max98363 = dev_get_drvdata(dev);
  93         unsigned long time;
  94
  95         if (!max98363->first_hw_init)
  96                 return 0;
  97
  98         if (!slave->unattach_request)
  99                 goto regmap_sync;
 100
 101         time = wait_for_completion_timeout(&slave->initialization_complete,
 102                                            msecs_to_jiffies(MAX98363_PROBE_TIMEOUT));
 103         if (!time) {
 104                 dev_err(dev, "Initialization not complete, timed out\n");
 105                 return -ETIMEDOUT;
 106         }
 107
 108 regmap_sync:
 109
 110         slave->unattach_request = 0;
 111         regcache_cache_only(max98363->regmap, false);
 112         regcache_sync(max98363->regmap);
 113
 114         return 0;
 115 }
 116
 117 static DEFINE_RUNTIME_DEV_PM_OPS(max98363_pm, max98363_suspend, max98363_resume, NULL);
 118
 119 static int max98363_read_prop(struct sdw_slave *slave)
 120 {
 121         struct sdw_slave_prop *prop = &slave->prop;
 122         int nval, i;
 123         u32 bit;
 124         unsigned long addr;
 125         struct sdw_dpn_prop *dpn;
 126
 127         prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
 128
 129         /* BITMAP: 00000010  Dataport 1 is active */
 130         prop->sink_ports = BIT(1);
 131         prop->paging_support = true;
 132         prop->clk_stop_timeout = 20;
 133         prop->simple_clk_stop_capable = true;
 134         prop->clock_reg_supported = true;
 135
 136         nval = hweight32(prop->sink_ports);
 137         prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
 138                                            sizeof(*prop->sink_dpn_prop),
 139                                            GFP_KERNEL);
 140         if (!prop->sink_dpn_prop)
 141                 return -ENOMEM;
 142
 143         i = 0;
 144         dpn = prop->sink_dpn_prop;
 145         addr = prop->sink_ports;
 146         for_each_set_bit(bit, &addr, 32) {
 147                 dpn[i].num = bit;
 148                 dpn[i].type = SDW_DPN_FULL;
 149                 dpn[i].simple_ch_prep_sm = true;
 150                 dpn[i].ch_prep_timeout = 10;
 151                 i++;
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int max98363_io_init(struct sdw_slave *slave)
 158 {
 159         struct device *dev = &slave->dev;
 160         struct max98363_priv *max98363 = dev_get_drvdata(dev);
 161         int ret, reg;
 162
 163         regcache_cache_only(max98363->regmap, false);
 164         if (max98363->first_hw_init)
 165                 regcache_cache_bypass(max98363->regmap, true);
 166
 167         /*
 168          * PM runtime status is marked as 'active' only when a Slave reports as Attached
 169          */
 170         if (!max98363->first_hw_init)
 171                 /* update count of parent 'active' children */
 172                 pm_runtime_set_active(dev);
 173
 174         pm_runtime_get_noresume(dev);
 175
 176         ret = regmap_read(max98363->regmap, MAX98363_R21FF_REV_ID, &reg);
 177         if (!ret)
 178                 dev_info(dev, "Revision ID: %X\n", reg);
 179         else
 180                 goto out;
 181
 182         if (max98363->first_hw_init) {
 183                 regcache_cache_bypass(max98363->regmap, false);
 184                 regcache_mark_dirty(max98363->regmap);
 185         }
 186
 187         max98363->first_hw_init = true;
 188         max98363->hw_init = true;
 189
 190 out:
 191         pm_runtime_mark_last_busy(dev);
 192         pm_runtime_put_autosuspend(dev);
 193
 194         return ret;
 195 }
 196
 197 #define MAX98363_RATES SNDRV_PCM_RATE_8000_192000
 198 #define MAX98363_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
 199
 200 static int max98363_sdw_dai_hw_params(struct snd_pcm_substream *substream,
 201                                       struct snd_pcm_hw_params *params,
 202                                       struct snd_soc_dai *dai)
 203 {
 204         struct snd_soc_component *component = dai->component;
 205         struct max98363_priv *max98363 =
 206                 snd_soc_component_get_drvdata(component);
 207
 208         struct sdw_stream_config stream_config;
 209         struct sdw_port_config port_config;
 210         enum sdw_data_direction direction;
 211         struct sdw_stream_runtime *stream;
 212         struct snd_pcm_runtime *runtime = substream->runtime;
 213
 214         int ret;
 215
 216         stream = snd_soc_dai_get_dma_data(dai, substream);
 217
 218         if (!stream)
 219                 return -EINVAL;
 220
 221         if (!max98363->slave)
 222                 return -EINVAL;
 223
 224         if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
 225                 return -EINVAL;
 226
 227         direction = SDW_DATA_DIR_RX;
 228         port_config.num = 1;
 229
 230         stream_config.frame_rate = params_rate(params);
 231         stream_config.bps = snd_pcm_format_width(params_format(params));
 232         stream_config.direction = direction;
 233         stream_config.ch_count = 1;
 234
 235         if (stream_config.ch_count > runtime->hw.channels_max) {
 236                 stream_config.ch_count = runtime->hw.channels_max;
 237                 dev_info(dai->dev, "Number of channels: %d (requested: %d)\n",
 238                          stream_config.ch_count, params_channels(params));
 239         }
 240         port_config.ch_mask = GENMASK((int)stream_config.ch_count - 1, 0);
 241
 242         ret = sdw_stream_add_slave(max98363->slave, &stream_config,
 243                                    &port_config, 1, stream);
 244         if (ret) {
 245                 dev_err(dai->dev, "Unable to configure port\n");
 246                 return ret;
 247         }
 248
 249         dev_dbg(component->dev, "Format supported %d", params_format(params));
 250
 251         return 0;
 252 }
 253
 254 static int max98363_pcm_hw_free(struct snd_pcm_substream *substream,
 255                                 struct snd_soc_dai *dai)
 256 {
 257         struct snd_soc_component *component = dai->component;
 258         struct max98363_priv *max98363 =
 259                 snd_soc_component_get_drvdata(component);
 260         struct sdw_stream_runtime *stream =
 261                 snd_soc_dai_get_dma_data(dai, substream);
 262
 263         if (!max98363->slave)
 264                 return -EINVAL;
 265
 266         sdw_stream_remove_slave(max98363->slave, stream);
 267
 268         return 0;
 269 }
 270
 271 static int max98363_set_sdw_stream(struct snd_soc_dai *dai,
 272                                    void *sdw_stream, int direction)
 273 {
 274         snd_soc_dai_dma_data_set(dai, direction, sdw_stream);
 275
 276         return 0;
 277 }
 278
 279 static const struct snd_soc_dai_ops max98363_dai_sdw_ops = {
 280         .hw_params = max98363_sdw_dai_hw_params,
 281         .hw_free = max98363_pcm_hw_free,
 282         .set_stream = max98363_set_sdw_stream,
 283 };
 284
 285 static struct snd_soc_dai_driver max98363_dai[] = {
 286         {
 287                 .name = "max98363-aif1",
 288                 .playback = {
 289                         .stream_name = "HiFi Playback",
 290                         .channels_min = 1,
 291                         .channels_max = 1,
 292                         .rates = MAX98363_RATES,
 293                         .formats = MAX98363_FORMATS,
 294                 },
 295                 .ops = &max98363_dai_sdw_ops,
 296         }
 297 };
 298
 299 static int max98363_update_status(struct sdw_slave *slave,
 300                                   enum sdw_slave_status status)
 301 {
 302         struct max98363_priv *max98363 = dev_get_drvdata(&slave->dev);
 303
 304         if (status == SDW_SLAVE_UNATTACHED)
 305                 max98363->hw_init = false;
 306
 307         /*
 308          * Perform initialization only if slave status is SDW_SLAVE_ATTACHED
 309          */
 310         if (max98363->hw_init || status != SDW_SLAVE_ATTACHED)
 311                 return 0;
 312
 313         /* perform I/O transfers required for Slave initialization */
 314         return max98363_io_init(slave);
 315 }
 316
 317 static struct sdw_slave_ops max98363_slave_ops = {
 318         .read_prop = max98363_read_prop,
 319         .update_status = max98363_update_status,
 320 };
 321
 322 static DECLARE_TLV_DB_SCALE(max98363_digital_tlv, -6350, 50, 1);
 323 static const DECLARE_TLV_DB_RANGE(max98363_spk_tlv,
 324         0, 5, TLV_DB_SCALE_ITEM(-300, 300, 0),
 325 );
 326
 327 static const char * const max98363_tone_cfg_text[] = {
 328         "Reserved", "0", "+FS/2", "-FS/2", "1KHz",
 329         "12KHz", "8KHz", "6KHz", "4KHz", "3KHz",
 330         "2KHz", "1.5KHz", "Reserved", "500Hz", "250Hz"
 331 };
 332
 333 static SOC_ENUM_SINGLE_DECL(max98363_tone_cfg_enum,
 334                             MAX98363_R2030_TONE_GEN_CFG, 0,
 335                             max98363_tone_cfg_text);
 336
 337 static const char * const max98363_spkmon_duration_text[] = {
 338         "8ms", "20ms", "40ms", "60ms",
 339         "80ms", "160ms", "240ms", "320ms",
 340         "400ms", "480ms", "560ms", "640ms",
 341         "720ms", "800ms", "880ms", "960ms"
 342 };
 343
 344 static SOC_ENUM_SINGLE_DECL(max98363_spkmon_duration_enum,
 345                             MAX98363_R2023_SPK_MON_DURATION, 0,
 346                             max98363_spkmon_duration_text);
 347
 348 static const struct snd_kcontrol_new max98363_snd_controls[] = {
 349         SOC_SINGLE_TLV("Digital Volume", MAX98363_R2040_AMP_VOL,
 350                        0, 0x7F, 1, max98363_digital_tlv),
 351         SOC_SINGLE_TLV("Speaker Volume", MAX98363_R2041_AMP_GAIN,
 352                        0, 10, 0, max98363_spk_tlv),
 353         SOC_SINGLE("Tone Generator Switch", MAX98363_R203F_TONE_GEN_EN,
 354                    0, 1, 0),
 355         SOC_ENUM("Tone Config", max98363_tone_cfg_enum),
 356         SOC_SINGLE("Ramp Switch", MAX98363_R2042_DSP_CFG,
 357                    MAX98363_AMP_DSP_CFG_RMP_SHIFT, 1, 0),
 358         SOC_SINGLE("CLK Monitor Switch", MAX98363_R2021_ERR_MON_CTRL,
 359                    MAX98363_CLOCK_MON_SHIFT, 1, 0),
 360         SOC_SINGLE("SPKMON Monitor Switch", MAX98363_R2021_ERR_MON_CTRL,
 361                    MAX98363_SPKMON_SHIFT, 1, 0),
 362         SOC_SINGLE("SPKMON Thresh", MAX98363_R2022_SPK_MON_THRESH, 0, 0xFF, 0),
 363         SOC_ENUM("SPKMON Duration", max98363_spkmon_duration_enum),
 364 };
 365
 366 static const struct snd_soc_dapm_widget max98363_dapm_widgets[] = {
 367         SND_SOC_DAPM_AIF_IN("AIFIN", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
 368         SND_SOC_DAPM_OUTPUT("BE_OUT"),
 369 };
 370
 371 static const struct snd_soc_dapm_route max98363_audio_map[] = {
 372         /* Plabyack */
 373         {"BE_OUT", NULL, "AIFIN"},
 374 };
 375
 376 static const struct snd_soc_component_driver soc_codec_dev_max98363 = {
 377         .controls               = max98363_snd_controls,
 378         .num_controls           = ARRAY_SIZE(max98363_snd_controls),
 379         .dapm_widgets           = max98363_dapm_widgets,
 380         .num_dapm_widgets       = ARRAY_SIZE(max98363_dapm_widgets),
 381         .dapm_routes            = max98363_audio_map,
 382         .num_dapm_routes        = ARRAY_SIZE(max98363_audio_map),
 383         .use_pmdown_time        = 1,
 384         .endianness             = 1,
 385 };
 386
 387 static int max98363_init(struct sdw_slave *slave, struct regmap *regmap)
 388 {
 389         struct max98363_priv *max98363;
 390         int ret;
 391         struct device *dev = &slave->dev;
 392
 393         /*  Allocate and assign private driver data structure  */
 394         max98363 = devm_kzalloc(dev, sizeof(*max98363), GFP_KERNEL);
 395         if (!max98363)
 396                 return -ENOMEM;
 397
 398         dev_set_drvdata(dev, max98363);
 399         max98363->regmap = regmap;
 400         max98363->slave = slave;
 401
 402         regcache_cache_only(max98363->regmap, true);
 403
 404         max98363->hw_init = false;
 405         max98363->first_hw_init = false;
 406
 407         /* codec registration  */
 408         ret = devm_snd_soc_register_component(dev, &soc_codec_dev_max98363,
 409                                               max98363_dai,
 410                                               ARRAY_SIZE(max98363_dai));
 411         if (ret < 0) {
 412                 dev_err(dev, "Failed to register codec: %d\n", ret);
 413                 return ret;
 414         }
 415
 416         /* set autosuspend parameters */
 417         pm_runtime_set_autosuspend_delay(dev, 3000);
 418         pm_runtime_use_autosuspend(dev);
 419
 420         /* make sure the device does not suspend immediately */
 421         pm_runtime_mark_last_busy(dev);
 422
 423         pm_runtime_enable(dev);
 424
 425         /* important note: the device is NOT tagged as 'active' and will remain
 426          * 'suspended' until the hardware is enumerated/initialized. This is required
 427          * to make sure the ASoC framework use of pm_runtime_get_sync() does not silently
 428          * fail with -EACCESS because of race conditions between card creation and enumeration
 429          */
 430         return 0;
 431 }
 432
 433 static int max98363_sdw_probe(struct sdw_slave *slave,
 434                               const struct sdw_device_id *id)
 435 {
 436         struct regmap *regmap;
 437
 438         /* Regmap Initialization */
 439         regmap = devm_regmap_init_sdw(slave, &max98363_sdw_regmap);
 440         if (IS_ERR(regmap))
 441                 return PTR_ERR(regmap);
 442
 443         return max98363_init(slave, regmap);
 444 }
 445
 446 static const struct sdw_device_id max98363_id[] = {
 447         SDW_SLAVE_ENTRY(0x019F, 0x8363, 0),
 448         {},
 449 };
 450 MODULE_DEVICE_TABLE(sdw, max98363_id);
 451
 452 static struct sdw_driver max98363_sdw_driver = {
 453         .driver = {
 454                 .name = "max98363",
 455                 .pm = pm_ptr(&max98363_pm),
 456         },
 457         .probe = max98363_sdw_probe,
 458         .ops = &max98363_slave_ops,
 459         .id_table = max98363_id,
 460 };
 461
 462 module_sdw_driver(max98363_sdw_driver);
 463
 464 MODULE_DESCRIPTION("ASoC MAX98363 driver SDW");
 465 MODULE_AUTHOR("Ryan Lee <ryans.lee@analog.com>");
 466 MODULE_LICENSE("GPL");