drivers/staging/greybus/audio_codec.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * APBridge ALSA SoC dummy codec driver
   4  * Copyright 2016 Google Inc.
   5  * Copyright 2016 Linaro Ltd.
   6  */
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/pm_runtime.h>
  10 #include <sound/soc.h>
  11 #include <sound/pcm_params.h>
  12 #include <uapi/linux/input.h>
  13
  14 #include "audio_codec.h"
  15 #include "audio_apbridgea.h"
  16 #include "audio_manager.h"
  17 #include "audio_helper.h"
  18
  19 static struct gbaudio_codec_info *gbcodec;
  20
  21 static struct gbaudio_data_connection *
  22 find_data(struct gbaudio_module_info *module, int id)
  23 {
  24         struct gbaudio_data_connection *data;
  25
  26         list_for_each_entry(data, &module->data_list, list) {
  27                 if (id == data->id)
  28                         return data;
  29         }
  30         return NULL;
  31 }
  32
  33 static struct gbaudio_stream_params *
  34 find_dai_stream_params(struct gbaudio_codec_info *codec, int id, int stream)
  35 {
  36         struct gbaudio_codec_dai *dai;
  37
  38         list_for_each_entry(dai, &codec->dai_list, list) {
  39                 if (dai->id == id)
  40                         return &dai->params[stream];
  41         }
  42         return NULL;
  43 }
  44
  45 static int gbaudio_module_enable_tx(struct gbaudio_codec_info *codec,
  46                                     struct gbaudio_module_info *module, int id)
  47 {
  48         int module_state, ret = 0;
  49         u16 data_cport, i2s_port, cportid;
  50         u8 sig_bits, channels;
  51         u32 format, rate;
  52         struct gbaudio_data_connection *data;
  53         struct gbaudio_stream_params *params;
  54
  55         /* find the dai */
  56         data = find_data(module, id);
  57         if (!data) {
  58                 dev_err(module->dev, "%d:DATA connection missing\n", id);
  59                 return -ENODEV;
  60         }
  61         module_state = data->state[SNDRV_PCM_STREAM_PLAYBACK];
  62
  63         params = find_dai_stream_params(codec, id, SNDRV_PCM_STREAM_PLAYBACK);
  64         if (!params) {
  65                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
  66                 return -EINVAL;
  67         }
  68
  69         /* register cport */
  70         if (module_state < GBAUDIO_CODEC_STARTUP) {
  71                 i2s_port = 0;   /* fixed for now */
  72                 cportid = data->connection->hd_cport_id;
  73                 ret = gb_audio_apbridgea_register_cport(data->connection,
  74                                                 i2s_port, cportid,
  75                                                 AUDIO_APBRIDGEA_DIRECTION_TX);
  76                 if (ret) {
  77                         dev_err_ratelimited(module->dev,
  78                                             "reg_cport failed:%d\n", ret);
  79                         return ret;
  80                 }
  81                 data->state[SNDRV_PCM_STREAM_PLAYBACK] =
  82                         GBAUDIO_CODEC_STARTUP;
  83                 dev_dbg(module->dev, "Dynamic Register %d DAI\n", cportid);
  84         }
  85
  86         /* hw_params */
  87         if (module_state < GBAUDIO_CODEC_HWPARAMS) {
  88                 format = params->format;
  89                 channels = params->channels;
  90                 rate = params->rate;
  91                 sig_bits = params->sig_bits;
  92                 data_cport = data->connection->intf_cport_id;
  93                 ret = gb_audio_gb_set_pcm(module->mgmt_connection, data_cport,
  94                                           format, rate, channels, sig_bits);
  95                 if (ret) {
  96                         dev_err_ratelimited(module->dev, "set_pcm failed:%d\n",
  97                                             ret);
  98                         return ret;
  99                 }
 100                 data->state[SNDRV_PCM_STREAM_PLAYBACK] =
 101                         GBAUDIO_CODEC_HWPARAMS;
 102                 dev_dbg(module->dev, "Dynamic hw_params %d DAI\n", data_cport);
 103         }
 104
 105         /* prepare */
 106         if (module_state < GBAUDIO_CODEC_PREPARE) {
 107                 data_cport = data->connection->intf_cport_id;
 108                 ret = gb_audio_gb_set_tx_data_size(module->mgmt_connection,
 109                                                    data_cport, 192);
 110                 if (ret) {
 111                         dev_err_ratelimited(module->dev,
 112                                             "set_tx_data_size failed:%d\n",
 113                                             ret);
 114                         return ret;
 115                 }
 116                 ret = gb_audio_gb_activate_tx(module->mgmt_connection,
 117                                               data_cport);
 118                 if (ret) {
 119                         dev_err_ratelimited(module->dev,
 120                                             "activate_tx failed:%d\n", ret);
 121                         return ret;
 122                 }
 123                 data->state[SNDRV_PCM_STREAM_PLAYBACK] =
 124                         GBAUDIO_CODEC_PREPARE;
 125                 dev_dbg(module->dev, "Dynamic prepare %d DAI\n", data_cport);
 126         }
 127
 128         return 0;
 129 }
 130
 131 static int gbaudio_module_disable_tx(struct gbaudio_module_info *module, int id)
 132 {
 133         int ret;
 134         u16 data_cport, cportid, i2s_port;
 135         int module_state;
 136         struct gbaudio_data_connection *data;
 137
 138         /* find the dai */
 139         data = find_data(module, id);
 140         if (!data) {
 141                 dev_err(module->dev, "%d:DATA connection missing\n", id);
 142                 return -ENODEV;
 143         }
 144         module_state = data->state[SNDRV_PCM_STREAM_PLAYBACK];
 145
 146         if (module_state > GBAUDIO_CODEC_HWPARAMS) {
 147                 data_cport = data->connection->intf_cport_id;
 148                 ret = gb_audio_gb_deactivate_tx(module->mgmt_connection,
 149                                                 data_cport);
 150                 if (ret) {
 151                         dev_err_ratelimited(module->dev,
 152                                             "deactivate_tx failed:%d\n", ret);
 153                         return ret;
 154                 }
 155                 dev_dbg(module->dev, "Dynamic deactivate %d DAI\n", data_cport);
 156                 data->state[SNDRV_PCM_STREAM_PLAYBACK] =
 157                         GBAUDIO_CODEC_HWPARAMS;
 158         }
 159
 160         if (module_state > GBAUDIO_CODEC_SHUTDOWN) {
 161                 i2s_port = 0;   /* fixed for now */
 162                 cportid = data->connection->hd_cport_id;
 163                 ret = gb_audio_apbridgea_unregister_cport(data->connection,
 164                                                 i2s_port, cportid,
 165                                                 AUDIO_APBRIDGEA_DIRECTION_TX);
 166                 if (ret) {
 167                         dev_err_ratelimited(module->dev,
 168                                             "unregister_cport failed:%d\n",
 169                                             ret);
 170                         return ret;
 171                 }
 172                 dev_dbg(module->dev, "Dynamic Unregister %d DAI\n", cportid);
 173                 data->state[SNDRV_PCM_STREAM_PLAYBACK] =
 174                         GBAUDIO_CODEC_SHUTDOWN;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static int gbaudio_module_enable_rx(struct gbaudio_codec_info *codec,
 181                                     struct gbaudio_module_info *module, int id)
 182 {
 183         int module_state, ret = 0;
 184         u16 data_cport, i2s_port, cportid;
 185         u8 sig_bits, channels;
 186         u32 format, rate;
 187         struct gbaudio_data_connection *data;
 188         struct gbaudio_stream_params *params;
 189
 190         /* find the dai */
 191         data = find_data(module, id);
 192         if (!data) {
 193                 dev_err(module->dev, "%d:DATA connection missing\n", id);
 194                 return -ENODEV;
 195         }
 196         module_state = data->state[SNDRV_PCM_STREAM_CAPTURE];
 197
 198         params = find_dai_stream_params(codec, id, SNDRV_PCM_STREAM_CAPTURE);
 199         if (!params) {
 200                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 201                 return -EINVAL;
 202         }
 203
 204         /* register cport */
 205         if (module_state < GBAUDIO_CODEC_STARTUP) {
 206                 i2s_port = 0;   /* fixed for now */
 207                 cportid = data->connection->hd_cport_id;
 208                 ret = gb_audio_apbridgea_register_cport(data->connection,
 209                                                 i2s_port, cportid,
 210                                                 AUDIO_APBRIDGEA_DIRECTION_RX);
 211                 if (ret) {
 212                         dev_err_ratelimited(module->dev,
 213                                             "reg_cport failed:%d\n", ret);
 214                         return ret;
 215                 }
 216                 data->state[SNDRV_PCM_STREAM_CAPTURE] =
 217                         GBAUDIO_CODEC_STARTUP;
 218                 dev_dbg(module->dev, "Dynamic Register %d DAI\n", cportid);
 219         }
 220
 221         /* hw_params */
 222         if (module_state < GBAUDIO_CODEC_HWPARAMS) {
 223                 format = params->format;
 224                 channels = params->channels;
 225                 rate = params->rate;
 226                 sig_bits = params->sig_bits;
 227                 data_cport = data->connection->intf_cport_id;
 228                 ret = gb_audio_gb_set_pcm(module->mgmt_connection, data_cport,
 229                                           format, rate, channels, sig_bits);
 230                 if (ret) {
 231                         dev_err_ratelimited(module->dev, "set_pcm failed:%d\n",
 232                                             ret);
 233                         return ret;
 234                 }
 235                 data->state[SNDRV_PCM_STREAM_CAPTURE] =
 236                         GBAUDIO_CODEC_HWPARAMS;
 237                 dev_dbg(module->dev, "Dynamic hw_params %d DAI\n", data_cport);
 238         }
 239
 240         /* prepare */
 241         if (module_state < GBAUDIO_CODEC_PREPARE) {
 242                 data_cport = data->connection->intf_cport_id;
 243                 ret = gb_audio_gb_set_rx_data_size(module->mgmt_connection,
 244                                                    data_cport, 192);
 245                 if (ret) {
 246                         dev_err_ratelimited(module->dev,
 247                                             "set_rx_data_size failed:%d\n",
 248                                             ret);
 249                         return ret;
 250                 }
 251                 ret = gb_audio_gb_activate_rx(module->mgmt_connection,
 252                                               data_cport);
 253                 if (ret) {
 254                         dev_err_ratelimited(module->dev,
 255                                             "activate_rx failed:%d\n", ret);
 256                         return ret;
 257                 }
 258                 data->state[SNDRV_PCM_STREAM_CAPTURE] =
 259                         GBAUDIO_CODEC_PREPARE;
 260                 dev_dbg(module->dev, "Dynamic prepare %d DAI\n", data_cport);
 261         }
 262
 263         return 0;
 264 }
 265
 266 static int gbaudio_module_disable_rx(struct gbaudio_module_info *module, int id)
 267 {
 268         int ret;
 269         u16 data_cport, cportid, i2s_port;
 270         int module_state;
 271         struct gbaudio_data_connection *data;
 272
 273         /* find the dai */
 274         data = find_data(module, id);
 275         if (!data) {
 276                 dev_err(module->dev, "%d:DATA connection missing\n", id);
 277                 return -ENODEV;
 278         }
 279         module_state = data->state[SNDRV_PCM_STREAM_CAPTURE];
 280
 281         if (module_state > GBAUDIO_CODEC_HWPARAMS) {
 282                 data_cport = data->connection->intf_cport_id;
 283                 ret = gb_audio_gb_deactivate_rx(module->mgmt_connection,
 284                                                 data_cport);
 285                 if (ret) {
 286                         dev_err_ratelimited(module->dev,
 287                                             "deactivate_rx failed:%d\n", ret);
 288                         return ret;
 289                 }
 290                 dev_dbg(module->dev, "Dynamic deactivate %d DAI\n", data_cport);
 291                 data->state[SNDRV_PCM_STREAM_CAPTURE] =
 292                         GBAUDIO_CODEC_HWPARAMS;
 293         }
 294
 295         if (module_state > GBAUDIO_CODEC_SHUTDOWN) {
 296                 i2s_port = 0;   /* fixed for now */
 297                 cportid = data->connection->hd_cport_id;
 298                 ret = gb_audio_apbridgea_unregister_cport(data->connection,
 299                                                 i2s_port, cportid,
 300                                                 AUDIO_APBRIDGEA_DIRECTION_RX);
 301                 if (ret) {
 302                         dev_err_ratelimited(module->dev,
 303                                             "unregister_cport failed:%d\n",
 304                                             ret);
 305                         return ret;
 306                 }
 307                 dev_dbg(module->dev, "Dynamic Unregister %d DAI\n", cportid);
 308                 data->state[SNDRV_PCM_STREAM_CAPTURE] =
 309                         GBAUDIO_CODEC_SHUTDOWN;
 310         }
 311
 312         return 0;
 313 }
 314
 315 int gbaudio_module_update(struct gbaudio_codec_info *codec,
 316                           struct snd_soc_dapm_widget *w,
 317                           struct gbaudio_module_info *module, int enable)
 318 {
 319         int dai_id, ret;
 320         char intf_name[NAME_SIZE], dir[NAME_SIZE];
 321
 322         dev_dbg(module->dev, "%s:Module update %s sequence\n", w->name,
 323                 enable ? "Enable" : "Disable");
 324
 325         if ((w->id != snd_soc_dapm_aif_in) && (w->id != snd_soc_dapm_aif_out)) {
 326                 dev_dbg(codec->dev, "No action required for %s\n", w->name);
 327                 return 0;
 328         }
 329
 330         /* parse dai_id from AIF widget's stream_name */
 331         ret = sscanf(w->sname, "%s %d %s", intf_name, &dai_id, dir);
 332         if (ret < 3) {
 333                 dev_err(codec->dev, "Error while parsing dai_id for %s\n",
 334                         w->name);
 335                 return -EINVAL;
 336         }
 337
 338         mutex_lock(&codec->lock);
 339         if (w->id == snd_soc_dapm_aif_in) {
 340                 if (enable)
 341                         ret = gbaudio_module_enable_tx(codec, module, dai_id);
 342                 else
 343                         ret = gbaudio_module_disable_tx(module, dai_id);
 344         } else if (w->id == snd_soc_dapm_aif_out) {
 345                 if (enable)
 346                         ret = gbaudio_module_enable_rx(codec, module, dai_id);
 347                 else
 348                         ret = gbaudio_module_disable_rx(module, dai_id);
 349         }
 350
 351         mutex_unlock(&codec->lock);
 352
 353         return ret;
 354 }
 355 EXPORT_SYMBOL(gbaudio_module_update);
 356
 357 /*
 358  * codec DAI ops
 359  */
 360 static int gbcodec_startup(struct snd_pcm_substream *substream,
 361                            struct snd_soc_dai *dai)
 362 {
 363         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 364         struct gbaudio_stream_params *params;
 365
 366         mutex_lock(&codec->lock);
 367
 368         if (list_empty(&codec->module_list)) {
 369                 dev_err(codec->dev, "No codec module available\n");
 370                 mutex_unlock(&codec->lock);
 371                 return -ENODEV;
 372         }
 373
 374         params = find_dai_stream_params(codec, dai->id, substream->stream);
 375         if (!params) {
 376                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 377                 mutex_unlock(&codec->lock);
 378                 return -EINVAL;
 379         }
 380         params->state = GBAUDIO_CODEC_STARTUP;
 381         mutex_unlock(&codec->lock);
 382         /* to prevent suspend in case of active audio */
 383         pm_stay_awake(dai->dev);
 384
 385         return 0;
 386 }
 387
 388 static void gbcodec_shutdown(struct snd_pcm_substream *substream,
 389                              struct snd_soc_dai *dai)
 390 {
 391         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 392         struct gbaudio_stream_params *params;
 393
 394         mutex_lock(&codec->lock);
 395
 396         if (list_empty(&codec->module_list))
 397                 dev_info(codec->dev, "No codec module available during shutdown\n");
 398
 399         params = find_dai_stream_params(codec, dai->id, substream->stream);
 400         if (!params) {
 401                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 402                 mutex_unlock(&codec->lock);
 403                 return;
 404         }
 405         params->state = GBAUDIO_CODEC_SHUTDOWN;
 406         mutex_unlock(&codec->lock);
 407         pm_relax(dai->dev);
 408 }
 409
 410 static int gbcodec_hw_params(struct snd_pcm_substream *substream,
 411                              struct snd_pcm_hw_params *hwparams,
 412                              struct snd_soc_dai *dai)
 413 {
 414         int ret;
 415         u8 sig_bits, channels;
 416         u32 format, rate;
 417         struct gbaudio_module_info *module;
 418         struct gbaudio_data_connection *data;
 419         struct gb_bundle *bundle;
 420         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 421         struct gbaudio_stream_params *params;
 422
 423         mutex_lock(&codec->lock);
 424
 425         if (list_empty(&codec->module_list)) {
 426                 dev_err(codec->dev, "No codec module available\n");
 427                 mutex_unlock(&codec->lock);
 428                 return -ENODEV;
 429         }
 430
 431         /*
 432          * assuming, currently only 48000 Hz, 16BIT_LE, stereo
 433          * is supported, validate params before configuring codec
 434          */
 435         if (params_channels(hwparams) != 2) {
 436                 dev_err(dai->dev, "Invalid channel count:%d\n",
 437                         params_channels(hwparams));
 438                 mutex_unlock(&codec->lock);
 439                 return -EINVAL;
 440         }
 441         channels = params_channels(hwparams);
 442
 443         if (params_rate(hwparams) != 48000) {
 444                 dev_err(dai->dev, "Invalid sampling rate:%d\n",
 445                         params_rate(hwparams));
 446                 mutex_unlock(&codec->lock);
 447                 return -EINVAL;
 448         }
 449         rate = GB_AUDIO_PCM_RATE_48000;
 450
 451         if (params_format(hwparams) != SNDRV_PCM_FORMAT_S16_LE) {
 452                 dev_err(dai->dev, "Invalid format:%d\n",
 453                         params_format(hwparams));
 454                 mutex_unlock(&codec->lock);
 455                 return -EINVAL;
 456         }
 457         format = GB_AUDIO_PCM_FMT_S16_LE;
 458
 459         /* find the data connection */
 460         list_for_each_entry(module, &codec->module_list, list) {
 461                 data = find_data(module, dai->id);
 462                 if (data)
 463                         break;
 464         }
 465
 466         if (!data) {
 467                 dev_err(dai->dev, "DATA connection missing\n");
 468                 mutex_unlock(&codec->lock);
 469                 return -EINVAL;
 470         }
 471
 472         params = find_dai_stream_params(codec, dai->id, substream->stream);
 473         if (!params) {
 474                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 475                 mutex_unlock(&codec->lock);
 476                 return -EINVAL;
 477         }
 478
 479         bundle = to_gb_bundle(module->dev);
 480         ret = gb_pm_runtime_get_sync(bundle);
 481         if (ret) {
 482                 mutex_unlock(&codec->lock);
 483                 return ret;
 484         }
 485
 486         ret = gb_audio_apbridgea_set_config(data->connection, 0,
 487                                             AUDIO_APBRIDGEA_PCM_FMT_16,
 488                                             AUDIO_APBRIDGEA_PCM_RATE_48000,
 489                                             6144000);
 490         if (ret) {
 491                 dev_err_ratelimited(dai->dev, "%d: Error during set_config\n",
 492                                     ret);
 493                 gb_pm_runtime_put_noidle(bundle);
 494                 mutex_unlock(&codec->lock);
 495                 return ret;
 496         }
 497
 498         gb_pm_runtime_put_noidle(bundle);
 499
 500         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 501                 sig_bits = dai->driver->playback.sig_bits;
 502         else
 503                 sig_bits = dai->driver->capture.sig_bits;
 504
 505         params->state = GBAUDIO_CODEC_HWPARAMS;
 506         params->format = format;
 507         params->rate = rate;
 508         params->channels = channels;
 509         params->sig_bits = sig_bits;
 510
 511         mutex_unlock(&codec->lock);
 512         return 0;
 513 }
 514
 515 static int gbcodec_prepare(struct snd_pcm_substream *substream,
 516                            struct snd_soc_dai *dai)
 517 {
 518         int ret;
 519         struct gbaudio_module_info *module;
 520         struct gbaudio_data_connection *data;
 521         struct gb_bundle *bundle;
 522         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 523         struct gbaudio_stream_params *params;
 524
 525         mutex_lock(&codec->lock);
 526
 527         if (list_empty(&codec->module_list)) {
 528                 dev_err(codec->dev, "No codec module available\n");
 529                 mutex_unlock(&codec->lock);
 530                 return -ENODEV;
 531         }
 532
 533         list_for_each_entry(module, &codec->module_list, list) {
 534                 /* find the dai */
 535                 data = find_data(module, dai->id);
 536                 if (data)
 537                         break;
 538         }
 539         if (!data) {
 540                 dev_err(dai->dev, "DATA connection missing\n");
 541                 mutex_unlock(&codec->lock);
 542                 return -ENODEV;
 543         }
 544
 545         params = find_dai_stream_params(codec, dai->id, substream->stream);
 546         if (!params) {
 547                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 548                 mutex_unlock(&codec->lock);
 549                 return -EINVAL;
 550         }
 551
 552         bundle = to_gb_bundle(module->dev);
 553         ret = gb_pm_runtime_get_sync(bundle);
 554         if (ret) {
 555                 mutex_unlock(&codec->lock);
 556                 return ret;
 557         }
 558
 559         switch (substream->stream) {
 560         case SNDRV_PCM_STREAM_PLAYBACK:
 561                 ret = gb_audio_apbridgea_set_tx_data_size(data->connection, 0,
 562                                                           192);
 563                 break;
 564         case SNDRV_PCM_STREAM_CAPTURE:
 565                 ret = gb_audio_apbridgea_set_rx_data_size(data->connection, 0,
 566                                                           192);
 567                 break;
 568         }
 569         if (ret) {
 570                 gb_pm_runtime_put_noidle(bundle);
 571                 mutex_unlock(&codec->lock);
 572                 dev_err_ratelimited(dai->dev, "set_data_size failed:%d\n",
 573                                     ret);
 574                 return ret;
 575         }
 576
 577         gb_pm_runtime_put_noidle(bundle);
 578
 579         params->state = GBAUDIO_CODEC_PREPARE;
 580         mutex_unlock(&codec->lock);
 581         return 0;
 582 }
 583
 584 static int gbcodec_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 585 {
 586         int ret;
 587         struct gbaudio_data_connection *data;
 588         struct gbaudio_module_info *module;
 589         struct gb_bundle *bundle;
 590         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 591         struct gbaudio_stream_params *params;
 592
 593         dev_dbg(dai->dev, "Mute:%d, Direction:%s\n", mute,
 594                 stream ? "CAPTURE" : "PLAYBACK");
 595
 596         mutex_lock(&codec->lock);
 597
 598         params = find_dai_stream_params(codec, dai->id, stream);
 599         if (!params) {
 600                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 601                 mutex_unlock(&codec->lock);
 602                 return -EINVAL;
 603         }
 604
 605         if (list_empty(&codec->module_list)) {
 606                 dev_err(codec->dev, "No codec module available\n");
 607                 if (mute) {
 608                         params->state = GBAUDIO_CODEC_STOP;
 609                         ret = 0;
 610                 } else {
 611                         ret = -ENODEV;
 612                 }
 613                 mutex_unlock(&codec->lock);
 614                 return ret;
 615         }
 616
 617         list_for_each_entry(module, &codec->module_list, list) {
 618                 /* find the dai */
 619                 data = find_data(module, dai->id);
 620                 if (data)
 621                         break;
 622         }
 623         if (!data) {
 624                 dev_err(dai->dev, "%s DATA connection missing\n",
 625                         dai->name);
 626                 mutex_unlock(&codec->lock);
 627                 return -ENODEV;
 628         }
 629
 630         bundle = to_gb_bundle(module->dev);
 631         ret = gb_pm_runtime_get_sync(bundle);
 632         if (ret) {
 633                 mutex_unlock(&codec->lock);
 634                 return ret;
 635         }
 636
 637         if (!mute && !stream) {/* start playback */
 638                 ret = gb_audio_apbridgea_prepare_tx(data->connection,
 639                                                     0);
 640                 if (!ret)
 641                         ret = gb_audio_apbridgea_start_tx(data->connection,
 642                                                           0, 0);
 643                 params->state = GBAUDIO_CODEC_START;
 644         } else if (!mute && stream) {/* start capture */
 645                 ret = gb_audio_apbridgea_prepare_rx(data->connection,
 646                                                     0);
 647                 if (!ret)
 648                         ret = gb_audio_apbridgea_start_rx(data->connection,
 649                                                           0);
 650                 params->state = GBAUDIO_CODEC_START;
 651         } else if (mute && !stream) {/* stop playback */
 652                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 653                 if (!ret)
 654                         ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 655                                                              0);
 656                 params->state = GBAUDIO_CODEC_STOP;
 657         } else if (mute && stream) {/* stop capture */
 658                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 659                 if (!ret)
 660                         ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 661                                                              0);
 662                 params->state = GBAUDIO_CODEC_STOP;
 663         } else {
 664                 ret = -EINVAL;
 665         }
 666
 667         if (ret)
 668                 dev_err_ratelimited(dai->dev,
 669                                     "%s:Error during %s %s stream:%d\n",
 670                                     module->name, mute ? "Mute" : "Unmute",
 671                                     stream ? "Capture" : "Playback", ret);
 672
 673         gb_pm_runtime_put_noidle(bundle);
 674         mutex_unlock(&codec->lock);
 675         return ret;
 676 }
 677
 678 static const struct snd_soc_dai_ops gbcodec_dai_ops = {
 679         .startup = gbcodec_startup,
 680         .shutdown = gbcodec_shutdown,
 681         .hw_params = gbcodec_hw_params,
 682         .prepare = gbcodec_prepare,
 683         .mute_stream = gbcodec_mute_stream,
 684 };
 685
 686 static struct snd_soc_dai_driver gbaudio_dai[] = {
 687         {
 688                 .name = "apb-i2s0",
 689                 .id = 0,
 690                 .playback = {
 691                         .stream_name = "I2S 0 Playback",
 692                         .rates = SNDRV_PCM_RATE_48000,
 693                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 694                         .rate_max = 48000,
 695                         .rate_min = 48000,
 696                         .channels_min = 1,
 697                         .channels_max = 2,
 698                         .sig_bits = 16,
 699                 },
 700                 .capture = {
 701                         .stream_name = "I2S 0 Capture",
 702                         .rates = SNDRV_PCM_RATE_48000,
 703                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 704                         .rate_max = 48000,
 705                         .rate_min = 48000,
 706                         .channels_min = 1,
 707                         .channels_max = 2,
 708                         .sig_bits = 16,
 709                 },
 710                 .ops = &gbcodec_dai_ops,
 711         },
 712 };
 713
 714 static int gbaudio_init_jack(struct gbaudio_module_info *module,
 715                              struct snd_soc_card *card)
 716 {
 717         int ret;
 718         struct gbaudio_jack *jack, *n;
 719         struct snd_soc_jack_pin *headset, *button;
 720
 721         if (!module->jack_mask)
 722                 return 0;
 723
 724         snprintf(module->jack_name, NAME_SIZE, "GB %d Headset Jack",
 725                  module->dev_id);
 726
 727         headset = devm_kzalloc(module->dev, sizeof(*headset), GFP_KERNEL);
 728         if (!headset)
 729                 return -ENOMEM;
 730
 731         headset->pin = module->jack_name;
 732         headset->mask = module->jack_mask;
 733         ret = snd_soc_card_jack_new(card, module->jack_name, module->jack_mask,
 734                                     &module->headset.jack, headset, 1);
 735         if (ret) {
 736                 dev_err(module->dev, "Failed to create new jack\n");
 737                 return ret;
 738         }
 739
 740         /* Add to module's jack list */
 741         list_add(&module->headset.list, &module->jack_list);
 742
 743         if (!module->button_mask)
 744                 return 0;
 745
 746         snprintf(module->button_name, NAME_SIZE, "GB %d Button Jack",
 747                  module->dev_id);
 748         button = devm_kzalloc(module->dev, sizeof(*button), GFP_KERNEL);
 749         if (!button) {
 750                 ret = -ENOMEM;
 751                 goto free_jacks;
 752         }
 753
 754         button->pin = module->button_name;
 755         button->mask = module->button_mask;
 756         ret = snd_soc_card_jack_new(card, module->button_name,
 757                                     module->button_mask, &module->button.jack,
 758                                     button, 1);
 759         if (ret) {
 760                 dev_err(module->dev, "Failed to create button jack\n");
 761                 goto free_jacks;
 762         }
 763
 764         /* Add to module's jack list */
 765         list_add(&module->button.list, &module->jack_list);
 766
 767         /*
 768          * Currently, max 4 buttons are supported with following key mapping
 769          * BTN_0 = KEY_MEDIA
 770          * BTN_1 = KEY_VOICECOMMAND
 771          * BTN_2 = KEY_VOLUMEUP
 772          * BTN_3 = KEY_VOLUMEDOWN
 773          */
 774
 775         if (module->button_mask & SND_JACK_BTN_0) {
 776                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_0,
 777                                        KEY_MEDIA);
 778                 if (ret) {
 779                         dev_err(module->dev, "Failed to set BTN_0\n");
 780                         goto free_jacks;
 781                 }
 782         }
 783
 784         if (module->button_mask & SND_JACK_BTN_1) {
 785                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_1,
 786                                        KEY_VOICECOMMAND);
 787                 if (ret) {
 788                         dev_err(module->dev, "Failed to set BTN_1\n");
 789                         goto free_jacks;
 790                 }
 791         }
 792
 793         if (module->button_mask & SND_JACK_BTN_2) {
 794                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_2,
 795                                        KEY_VOLUMEUP);
 796                 if (ret) {
 797                         dev_err(module->dev, "Failed to set BTN_2\n");
 798                         goto free_jacks;
 799                 }
 800         }
 801
 802         if (module->button_mask & SND_JACK_BTN_3) {
 803                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_3,
 804                                        KEY_VOLUMEDOWN);
 805                 if (ret) {
 806                         dev_err(module->dev, "Failed to set BTN_0\n");
 807                         goto free_jacks;
 808                 }
 809         }
 810
 811         /* FIXME
 812          * verify if this is really required
 813         set_bit(INPUT_PROP_NO_DUMMY_RELEASE,
 814                 module->button.jack.jack->input_dev->propbit);
 815         */
 816
 817         return 0;
 818
 819 free_jacks:
 820         list_for_each_entry_safe(jack, n, &module->jack_list, list) {
 821                 snd_device_free(card->snd_card, jack->jack.jack);
 822                 list_del(&jack->list);
 823         }
 824
 825         return ret;
 826 }
 827
 828 int gbaudio_register_module(struct gbaudio_module_info *module)
 829 {
 830         int ret;
 831         struct snd_soc_component *comp;
 832         struct snd_card *card;
 833         struct gbaudio_jack *jack = NULL;
 834
 835         if (!gbcodec) {
 836                 dev_err(module->dev, "GB Codec not yet probed\n");
 837                 return -EAGAIN;
 838         }
 839
 840         comp = gbcodec->component;
 841         card = comp->card->snd_card;
 842
 843         down_write(&card->controls_rwsem);
 844
 845         if (module->num_dais) {
 846                 dev_err(gbcodec->dev,
 847                         "%d:DAIs not supported via gbcodec driver\n",
 848                         module->num_dais);
 849                 up_write(&card->controls_rwsem);
 850                 return -EINVAL;
 851         }
 852
 853         ret = gbaudio_init_jack(module, comp->card);
 854         if (ret) {
 855                 up_write(&card->controls_rwsem);
 856                 return ret;
 857         }
 858
 859         if (module->dapm_widgets)
 860                 snd_soc_dapm_new_controls(&comp->dapm, module->dapm_widgets,
 861                                           module->num_dapm_widgets);
 862         if (module->controls)
 863                 snd_soc_add_component_controls(comp, module->controls,
 864                                                module->num_controls);
 865         if (module->dapm_routes)
 866                 snd_soc_dapm_add_routes(&comp->dapm, module->dapm_routes,
 867                                         module->num_dapm_routes);
 868
 869         /* card already instantiated, create widgets here only */
 870         if (comp->card->instantiated) {
 871                 gbaudio_dapm_link_component_dai_widgets(comp->card,
 872                                                         &comp->dapm);
 873 #ifdef CONFIG_SND_JACK
 874                 /*
 875                  * register jack devices for this module
 876                  * from codec->jack_list
 877                  */
 878                 list_for_each_entry(jack, &module->jack_list, list) {
 879                         snd_device_register(comp->card->snd_card,
 880                                             jack->jack.jack);
 881                 }
 882 #endif
 883         }
 884
 885         mutex_lock(&gbcodec->lock);
 886         list_add(&module->list, &gbcodec->module_list);
 887         mutex_unlock(&gbcodec->lock);
 888
 889         if (comp->card->instantiated)
 890                 ret = snd_soc_dapm_new_widgets(comp->card);
 891         dev_dbg(comp->dev, "Registered %s module\n", module->name);
 892
 893         up_write(&card->controls_rwsem);
 894         return ret;
 895 }
 896 EXPORT_SYMBOL(gbaudio_register_module);
 897
 898 static void gbaudio_codec_clean_data_tx(struct gbaudio_data_connection *data)
 899 {
 900         u16 i2s_port, cportid;
 901         int ret;
 902
 903         if (list_is_singular(&gbcodec->module_list)) {
 904                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 905                 if (ret)
 906                         return;
 907                 ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 908                                                      0);
 909                 if (ret)
 910                         return;
 911         }
 912         i2s_port = 0;   /* fixed for now */
 913         cportid = data->connection->hd_cport_id;
 914         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 915                                                   i2s_port, cportid,
 916                                                   AUDIO_APBRIDGEA_DIRECTION_TX);
 917         data->state[0] = GBAUDIO_CODEC_SHUTDOWN;
 918 }
 919
 920 static void gbaudio_codec_clean_data_rx(struct gbaudio_data_connection *data)
 921 {
 922         u16 i2s_port, cportid;
 923         int ret;
 924
 925         if (list_is_singular(&gbcodec->module_list)) {
 926                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 927                 if (ret)
 928                         return;
 929                 ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 930                                                      0);
 931                 if (ret)
 932                         return;
 933         }
 934         i2s_port = 0;   /* fixed for now */
 935         cportid = data->connection->hd_cport_id;
 936         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 937                                                   i2s_port, cportid,
 938                                                   AUDIO_APBRIDGEA_DIRECTION_RX);
 939         data->state[1] = GBAUDIO_CODEC_SHUTDOWN;
 940 }
 941
 942 static void gbaudio_codec_cleanup(struct gbaudio_module_info *module)
 943 {
 944         struct gbaudio_data_connection *data;
 945         int pb_state, cap_state;
 946
 947         dev_dbg(gbcodec->dev, "%s: removed, cleanup APBridge\n", module->name);
 948         list_for_each_entry(data, &module->data_list, list) {
 949                 pb_state = data->state[0];
 950                 cap_state = data->state[1];
 951
 952                 if (pb_state > GBAUDIO_CODEC_SHUTDOWN)
 953                         gbaudio_codec_clean_data_tx(data);
 954
 955                 if (cap_state > GBAUDIO_CODEC_SHUTDOWN)
 956                         gbaudio_codec_clean_data_rx(data);
 957         }
 958 }
 959
 960 void gbaudio_unregister_module(struct gbaudio_module_info *module)
 961 {
 962         struct snd_soc_component *comp = gbcodec->component;
 963         struct snd_card *card = comp->card->snd_card;
 964         struct gbaudio_jack *jack, *n;
 965         int mask;
 966
 967         dev_dbg(comp->dev, "Unregister %s module\n", module->name);
 968
 969         down_write(&card->controls_rwsem);
 970         mutex_lock(&gbcodec->lock);
 971         gbaudio_codec_cleanup(module);
 972         list_del(&module->list);
 973         dev_dbg(comp->dev, "Process Unregister %s module\n", module->name);
 974         mutex_unlock(&gbcodec->lock);
 975
 976 #ifdef CONFIG_SND_JACK
 977         /* free jack devices for this module jack_list */
 978         list_for_each_entry_safe(jack, n, &module->jack_list, list) {
 979                 if (jack == &module->headset)
 980                         mask = GBCODEC_JACK_MASK;
 981                 else if (jack == &module->button)
 982                         mask = GBCODEC_JACK_BUTTON_MASK;
 983                 else
 984                         mask = 0;
 985                 if (mask) {
 986                         dev_dbg(module->dev, "Report %s removal\n",
 987                                 jack->jack.jack->id);
 988                         snd_soc_jack_report(&jack->jack, 0, mask);
 989                         snd_device_free(comp->card->snd_card,
 990                                         jack->jack.jack);
 991                         list_del(&jack->list);
 992                 }
 993         }
 994 #endif
 995
 996         if (module->dapm_routes) {
 997                 dev_dbg(comp->dev, "Removing %d routes\n",
 998                         module->num_dapm_routes);
 999                 snd_soc_dapm_del_routes(&comp->dapm, module->dapm_routes,
1000                                         module->num_dapm_routes);
1001         }
1002         if (module->controls) {
1003                 dev_dbg(comp->dev, "Removing %d controls\n",
1004                         module->num_controls);
1005                 /* release control semaphore */
1006                 up_write(&card->controls_rwsem);
1007                 gbaudio_remove_component_controls(comp, module->controls,
1008                                                   module->num_controls);
1009                 down_write(&card->controls_rwsem);
1010         }
1011         if (module->dapm_widgets) {
1012                 dev_dbg(comp->dev, "Removing %d widgets\n",
1013                         module->num_dapm_widgets);
1014                 gbaudio_dapm_free_controls(&comp->dapm, module->dapm_widgets,
1015                                            module->num_dapm_widgets);
1016         }
1017
1018         dev_dbg(comp->dev, "Unregistered %s module\n", module->name);
1019
1020         up_write(&card->controls_rwsem);
1021 }
1022 EXPORT_SYMBOL(gbaudio_unregister_module);
1023
1024 /*
1025  * component driver ops
1026  */
1027 static int gbcodec_probe(struct snd_soc_component *comp)
1028 {
1029         int i;
1030         struct gbaudio_codec_info *info;
1031         struct gbaudio_codec_dai *dai;
1032
1033         info = devm_kzalloc(comp->dev, sizeof(*info), GFP_KERNEL);
1034         if (!info)
1035                 return -ENOMEM;
1036
1037         info->dev = comp->dev;
1038         INIT_LIST_HEAD(&info->module_list);
1039         mutex_init(&info->lock);
1040         INIT_LIST_HEAD(&info->dai_list);
1041
1042         /* init dai_list used to maintain runtime stream info */
1043         for (i = 0; i < ARRAY_SIZE(gbaudio_dai); i++) {
1044                 dai = devm_kzalloc(comp->dev, sizeof(*dai), GFP_KERNEL);
1045                 if (!dai)
1046                         return -ENOMEM;
1047                 dai->id = gbaudio_dai[i].id;
1048                 list_add(&dai->list, &info->dai_list);
1049         }
1050
1051         info->component = comp;
1052         snd_soc_component_set_drvdata(comp, info);
1053         gbcodec = info;
1054
1055         device_init_wakeup(comp->dev, 1);
1056         return 0;
1057 }
1058
1059 static void gbcodec_remove(struct snd_soc_component *comp)
1060 {
1061         /* Empty function for now */
1062         return;
1063 }
1064
1065 static int gbcodec_write(struct snd_soc_component *comp, unsigned int reg,
1066                          unsigned int value)
1067 {
1068         return 0;
1069 }
1070
1071 static unsigned int gbcodec_read(struct snd_soc_component *comp,
1072                                  unsigned int reg)
1073 {
1074         return 0;
1075 }
1076
1077 static const struct snd_soc_component_driver soc_codec_dev_gbaudio = {
1078         .probe  = gbcodec_probe,
1079         .remove = gbcodec_remove,
1080
1081         .read = gbcodec_read,
1082         .write = gbcodec_write,
1083 };
1084
1085 #ifdef CONFIG_PM
1086 static int gbaudio_codec_suspend(struct device *dev)
1087 {
1088         dev_dbg(dev, "%s: suspend\n", __func__);
1089         return 0;
1090 }
1091
1092 static int gbaudio_codec_resume(struct device *dev)
1093 {
1094         dev_dbg(dev, "%s: resume\n", __func__);
1095         return 0;
1096 }
1097
1098 static const struct dev_pm_ops gbaudio_codec_pm_ops = {
1099         .suspend        = gbaudio_codec_suspend,
1100         .resume         = gbaudio_codec_resume,
1101 };
1102 #endif
1103
1104 static int gbaudio_codec_probe(struct platform_device *pdev)
1105 {
1106         return devm_snd_soc_register_component(&pdev->dev,
1107                         &soc_codec_dev_gbaudio,
1108                         gbaudio_dai, ARRAY_SIZE(gbaudio_dai));
1109 }
1110
1111 static int gbaudio_codec_remove(struct platform_device *pdev)
1112 {
1113         return 0;
1114 }
1115
1116 static const struct of_device_id greybus_asoc_machine_of_match[]  = {
1117         { .compatible = "toshiba,apb-dummy-codec", },
1118         {},
1119 };
1120
1121 static struct platform_driver gbaudio_codec_driver = {
1122         .driver = {
1123                 .name = "apb-dummy-codec",
1124 #ifdef CONFIG_PM
1125                 .pm = &gbaudio_codec_pm_ops,
1126 #endif
1127                 .of_match_table = greybus_asoc_machine_of_match,
1128         },
1129         .probe = gbaudio_codec_probe,
1130         .remove = gbaudio_codec_remove,
1131 };
1132 module_platform_driver(gbaudio_codec_driver);
1133
1134 MODULE_DESCRIPTION("APBridge ALSA SoC dummy codec driver");
1135 MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
1136 MODULE_LICENSE("GPL v2");
1137 MODULE_ALIAS("platform:apb-dummy-codec");