drivers/staging/greybus/audio_codec.c

   1 /*
   2  * APBridge ALSA SoC dummy codec driver
   3  * Copyright 2016 Google Inc.
   4  * Copyright 2016 Linaro Ltd.
   5  *
   6  * Released under the GPLv2 only.
   7  */
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/pm_runtime.h>
  11 #include <sound/soc.h>
  12 #include <sound/pcm_params.h>
  13 #include <uapi/linux/input.h>
  14
  15 #include "audio_codec.h"
  16 #include "audio_apbridgea.h"
  17 #include "audio_manager.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         uint32_t 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         uint32_t 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         uint32_t 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
 594         dev_dbg(dai->dev, "Mute:%d, Direction:%s\n", mute,
 595                 stream ? "CAPTURE":"PLAYBACK");
 596
 597         mutex_lock(&codec->lock);
 598
 599         params = find_dai_stream_params(codec, dai->id, stream);
 600         if (!params) {
 601                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 602                 mutex_unlock(&codec->lock);
 603                 return -EINVAL;
 604         }
 605
 606         if (list_empty(&codec->module_list)) {
 607                 dev_err(codec->dev, "No codec module available\n");
 608                 if (mute) {
 609                         params->state = GBAUDIO_CODEC_STOP;
 610                         ret = 0;
 611                 } else {
 612                         ret = -ENODEV;
 613                 }
 614                 mutex_unlock(&codec->lock);
 615                 return ret;
 616         }
 617
 618         list_for_each_entry(module, &codec->module_list, list) {
 619                 /* find the dai */
 620                 data = find_data(module, dai->id);
 621                 if (data)
 622                         break;
 623         }
 624         if (!data) {
 625                 dev_err(dai->dev, "%s DATA connection missing\n",
 626                         dai->name);
 627                 mutex_unlock(&codec->lock);
 628                 return -ENODEV;
 629         }
 630
 631         bundle = to_gb_bundle(module->dev);
 632         ret = gb_pm_runtime_get_sync(bundle);
 633         if (ret) {
 634                 mutex_unlock(&codec->lock);
 635                 return ret;
 636         }
 637
 638         if (!mute && !stream) {/* start playback */
 639                 ret = gb_audio_apbridgea_prepare_tx(data->connection,
 640                                                     0);
 641                 if (!ret)
 642                         ret = gb_audio_apbridgea_start_tx(data->connection,
 643                                                           0, 0);
 644                 params->state = GBAUDIO_CODEC_START;
 645         } else if (!mute && stream) {/* start capture */
 646                 ret = gb_audio_apbridgea_prepare_rx(data->connection,
 647                                                     0);
 648                 if (!ret)
 649                         ret = gb_audio_apbridgea_start_rx(data->connection,
 650                                                           0);
 651                 params->state = GBAUDIO_CODEC_START;
 652         } else if (mute && !stream) {/* stop playback */
 653                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 654                 if (!ret)
 655                         ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 656                                                              0);
 657                 params->state = GBAUDIO_CODEC_STOP;
 658         } else if (mute && stream) {/* stop capture */
 659                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 660                 if (!ret)
 661                         ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 662                                                              0);
 663                 params->state = GBAUDIO_CODEC_STOP;
 664         } else {
 665                 ret = -EINVAL;
 666         }
 667
 668         if (ret)
 669                 dev_err_ratelimited(dai->dev,
 670                                     "%s:Error during %s %s stream:%d\n",
 671                                     module->name, mute ? "Mute" : "Unmute",
 672                                     stream ? "Capture" : "Playback", ret);
 673
 674         gb_pm_runtime_put_noidle(bundle);
 675         mutex_unlock(&codec->lock);
 676         return ret;
 677 }
 678
 679 static const struct snd_soc_dai_ops gbcodec_dai_ops = {
 680         .startup = gbcodec_startup,
 681         .shutdown = gbcodec_shutdown,
 682         .hw_params = gbcodec_hw_params,
 683         .prepare = gbcodec_prepare,
 684         .mute_stream = gbcodec_mute_stream,
 685 };
 686
 687 static struct snd_soc_dai_driver gbaudio_dai[] = {
 688         {
 689                 .name = "apb-i2s0",
 690                 .id = 0,
 691                 .playback = {
 692                         .stream_name = "I2S 0 Playback",
 693                         .rates = SNDRV_PCM_RATE_48000,
 694                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 695                         .rate_max = 48000,
 696                         .rate_min = 48000,
 697                         .channels_min = 1,
 698                         .channels_max = 2,
 699                         .sig_bits = 16,
 700                 },
 701                 .capture = {
 702                         .stream_name = "I2S 0 Capture",
 703                         .rates = SNDRV_PCM_RATE_48000,
 704                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 705                         .rate_max = 48000,
 706                         .rate_min = 48000,
 707                         .channels_min = 1,
 708                         .channels_max = 2,
 709                         .sig_bits = 16,
 710                 },
 711                 .ops = &gbcodec_dai_ops,
 712         },
 713 };
 714
 715 static int gbaudio_init_jack(struct gbaudio_module_info *module,
 716                              struct snd_soc_codec *codec)
 717 {
 718         int ret;
 719
 720         if (!module->jack_mask)
 721                 return 0;
 722
 723         snprintf(module->jack_name, NAME_SIZE, "GB %d Headset Jack",
 724                  module->dev_id);
 725         ret = snd_soc_jack_new(codec, module->jack_name, module->jack_mask,
 726                                &module->headset_jack);
 727         if (ret) {
 728                 dev_err(module->dev, "Failed to create new jack\n");
 729                 return ret;
 730         }
 731
 732         if (!module->button_mask)
 733                 return 0;
 734
 735         snprintf(module->button_name, NAME_SIZE, "GB %d Button Jack",
 736                  module->dev_id);
 737         ret = snd_soc_jack_new(codec, module->button_name, module->button_mask,
 738                                &module->button_jack);
 739         if (ret) {
 740                 dev_err(module->dev, "Failed to create button jack\n");
 741                 return ret;
 742         }
 743
 744         /*
 745          * Currently, max 4 buttons are supported with following key mapping
 746          * BTN_0 = KEY_MEDIA
 747          * BTN_1 = KEY_VOICECOMMAND
 748          * BTN_2 = KEY_VOLUMEUP
 749          * BTN_3 = KEY_VOLUMEDOWN
 750          */
 751
 752         if (module->button_mask & SND_JACK_BTN_0) {
 753                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_0,
 754                                        KEY_MEDIA);
 755                 if (ret) {
 756                         dev_err(module->dev, "Failed to set BTN_0\n");
 757                         return ret;
 758                 }
 759         }
 760
 761         if (module->button_mask & SND_JACK_BTN_1) {
 762                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_1,
 763                                        KEY_VOICECOMMAND);
 764                 if (ret) {
 765                         dev_err(module->dev, "Failed to set BTN_1\n");
 766                         return ret;
 767                 }
 768         }
 769
 770         if (module->button_mask & SND_JACK_BTN_2) {
 771                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_2,
 772                                        KEY_VOLUMEUP);
 773                 if (ret) {
 774                         dev_err(module->dev, "Failed to set BTN_2\n");
 775                         return ret;
 776                 }
 777         }
 778
 779         if (module->button_mask & SND_JACK_BTN_3) {
 780                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_3,
 781                                        KEY_VOLUMEDOWN);
 782                 if (ret) {
 783                         dev_err(module->dev, "Failed to set BTN_0\n");
 784                         return ret;
 785                 }
 786         }
 787
 788         /* FIXME
 789          * verify if this is really required
 790         set_bit(INPUT_PROP_NO_DUMMY_RELEASE,
 791                 module->button_jack.jack->input_dev->propbit);
 792         */
 793
 794         return 0;
 795 }
 796
 797 int gbaudio_register_module(struct gbaudio_module_info *module)
 798 {
 799         int ret;
 800         struct snd_soc_codec *codec;
 801         struct snd_card *card;
 802         struct snd_soc_jack *jack = NULL;
 803
 804         if (!gbcodec) {
 805                 dev_err(module->dev, "GB Codec not yet probed\n");
 806                 return -EAGAIN;
 807         }
 808
 809         codec = gbcodec->codec;
 810         card = codec->card->snd_card;
 811
 812         down_write(&card->controls_rwsem);
 813
 814         if (module->num_dais) {
 815                 dev_err(gbcodec->dev,
 816                         "%d:DAIs not supported via gbcodec driver\n",
 817                         module->num_dais);
 818                 up_write(&card->controls_rwsem);
 819                 return -EINVAL;
 820         }
 821
 822         ret = gbaudio_init_jack(module, codec);
 823         if (ret) {
 824                 up_write(&card->controls_rwsem);
 825                 return ret;
 826         }
 827
 828         if (module->dapm_widgets)
 829                 snd_soc_dapm_new_controls(&codec->dapm, module->dapm_widgets,
 830                                           module->num_dapm_widgets);
 831         if (module->controls)
 832                 snd_soc_add_codec_controls(codec, module->controls,
 833                                      module->num_controls);
 834         if (module->dapm_routes)
 835                 snd_soc_dapm_add_routes(&codec->dapm, module->dapm_routes,
 836                                         module->num_dapm_routes);
 837
 838         /* card already instantiated, create widgets here only */
 839         if (codec->card->instantiated) {
 840                 snd_soc_dapm_link_component_dai_widgets(codec->card,
 841                                                         &codec->dapm);
 842 #ifdef CONFIG_SND_JACK
 843                 /*
 844                  * register jack devices for this module
 845                  * from codec->jack_list
 846                  */
 847                 list_for_each_entry(jack, &codec->jack_list, list) {
 848                         if ((jack == &module->headset_jack)
 849                             || (jack == &module->button_jack))
 850                                 snd_device_register(codec->card->snd_card,
 851                                                     jack->jack);
 852                 }
 853 #endif
 854         }
 855
 856         mutex_lock(&gbcodec->lock);
 857         list_add(&module->list, &gbcodec->module_list);
 858         mutex_unlock(&gbcodec->lock);
 859
 860         if (codec->card->instantiated)
 861                 ret = snd_soc_dapm_new_widgets(&codec->dapm);
 862         dev_dbg(codec->dev, "Registered %s module\n", module->name);
 863
 864         up_write(&card->controls_rwsem);
 865         return ret;
 866 }
 867 EXPORT_SYMBOL(gbaudio_register_module);
 868
 869 static void gbaudio_codec_clean_data_tx(struct gbaudio_data_connection *data)
 870 {
 871         u16 i2s_port, cportid;
 872         int ret;
 873
 874         if (list_is_singular(&gbcodec->module_list)) {
 875                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 876                 if (ret)
 877                         return;
 878                 ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 879                                                      0);
 880                 if (ret)
 881                         return;
 882         }
 883         i2s_port = 0;   /* fixed for now */
 884         cportid = data->connection->hd_cport_id;
 885         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 886                                                   i2s_port, cportid,
 887                                                   AUDIO_APBRIDGEA_DIRECTION_TX);
 888         data->state[0] = GBAUDIO_CODEC_SHUTDOWN;
 889 }
 890
 891 static void gbaudio_codec_clean_data_rx(struct gbaudio_data_connection *data)
 892 {
 893         u16 i2s_port, cportid;
 894         int ret;
 895
 896         if (list_is_singular(&gbcodec->module_list)) {
 897                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 898                 if (ret)
 899                         return;
 900                 ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 901                                                      0);
 902                 if (ret)
 903                         return;
 904         }
 905         i2s_port = 0;   /* fixed for now */
 906         cportid = data->connection->hd_cport_id;
 907         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 908                                                   i2s_port, cportid,
 909                                                   AUDIO_APBRIDGEA_DIRECTION_RX);
 910         data->state[1] = GBAUDIO_CODEC_SHUTDOWN;
 911 }
 912
 913
 914 static void gbaudio_codec_cleanup(struct gbaudio_module_info *module)
 915 {
 916         struct gbaudio_data_connection *data;
 917         int pb_state, cap_state;
 918
 919         dev_dbg(gbcodec->dev, "%s: removed, cleanup APBridge\n", module->name);
 920         list_for_each_entry(data, &module->data_list, list) {
 921                 pb_state = data->state[0];
 922                 cap_state = data->state[1];
 923
 924                 if (pb_state > GBAUDIO_CODEC_SHUTDOWN)
 925                         gbaudio_codec_clean_data_tx(data);
 926
 927                 if (cap_state > GBAUDIO_CODEC_SHUTDOWN)
 928                         gbaudio_codec_clean_data_rx(data);
 929
 930         }
 931 }
 932
 933 void gbaudio_unregister_module(struct gbaudio_module_info *module)
 934 {
 935         struct snd_soc_codec *codec = gbcodec->codec;
 936         struct snd_card *card = codec->card->snd_card;
 937         struct snd_soc_jack *jack, *next_j;
 938         int mask;
 939
 940         dev_dbg(codec->dev, "Unregister %s module\n", module->name);
 941
 942         down_write(&card->controls_rwsem);
 943         mutex_lock(&gbcodec->lock);
 944         gbaudio_codec_cleanup(module);
 945         list_del(&module->list);
 946         dev_dbg(codec->dev, "Process Unregister %s module\n", module->name);
 947         mutex_unlock(&gbcodec->lock);
 948
 949 #ifdef CONFIG_SND_JACK
 950         /* free jack devices for this module from codec->jack_list */
 951         list_for_each_entry_safe(jack, next_j, &codec->jack_list, list) {
 952                 if (jack == &module->headset_jack)
 953                         mask = GBCODEC_JACK_MASK;
 954                 else if (jack == &module->button_jack)
 955                         mask = GBCODEC_JACK_BUTTON_MASK;
 956                 else
 957                         mask = 0;
 958                 if (mask) {
 959                         dev_dbg(module->dev, "Report %s removal\n",
 960                                 jack->jack->id);
 961                         snd_soc_jack_report(jack, 0, mask);
 962                         snd_device_free(codec->card->snd_card, jack->jack);
 963                         list_del(&jack->list);
 964                 }
 965         }
 966 #endif
 967
 968         if (module->dapm_routes) {
 969                 dev_dbg(codec->dev, "Removing %d routes\n",
 970                         module->num_dapm_routes);
 971                 snd_soc_dapm_del_routes(&codec->dapm, module->dapm_routes,
 972                                         module->num_dapm_routes);
 973         }
 974         if (module->controls) {
 975                 dev_dbg(codec->dev, "Removing %d controls\n",
 976                         module->num_controls);
 977                 snd_soc_remove_codec_controls(codec, module->controls,
 978                                           module->num_controls);
 979         }
 980         if (module->dapm_widgets) {
 981                 dev_dbg(codec->dev, "Removing %d widgets\n",
 982                         module->num_dapm_widgets);
 983                 snd_soc_dapm_free_controls(&codec->dapm, module->dapm_widgets,
 984                                            module->num_dapm_widgets);
 985         }
 986
 987         dev_dbg(codec->dev, "Unregistered %s module\n", module->name);
 988
 989         up_write(&card->controls_rwsem);
 990 }
 991 EXPORT_SYMBOL(gbaudio_unregister_module);
 992
 993 /*
 994  * codec driver ops
 995  */
 996 static int gbcodec_probe(struct snd_soc_codec *codec)
 997 {
 998         int i;
 999         struct gbaudio_codec_info *info;
1000         struct gbaudio_codec_dai *dai;
1001
1002         info = devm_kzalloc(codec->dev, sizeof(*info), GFP_KERNEL);
1003         if (!info)
1004                 return -ENOMEM;
1005
1006         info->dev = codec->dev;
1007         INIT_LIST_HEAD(&info->module_list);
1008         mutex_init(&info->lock);
1009         INIT_LIST_HEAD(&info->dai_list);
1010
1011         /* init dai_list used to maintain runtime stream info */
1012         for (i = 0; i < ARRAY_SIZE(gbaudio_dai); i++) {
1013                 dai = devm_kzalloc(codec->dev, sizeof(*dai), GFP_KERNEL);
1014                 if (!dai)
1015                         return -ENOMEM;
1016                 dai->id = gbaudio_dai[i].id;
1017                 list_add(&dai->list, &info->dai_list);
1018         }
1019
1020         info->codec = codec;
1021         snd_soc_codec_set_drvdata(codec, info);
1022         gbcodec = info;
1023
1024         device_init_wakeup(codec->dev, 1);
1025         return 0;
1026 }
1027
1028 static int gbcodec_remove(struct snd_soc_codec *codec)
1029 {
1030         /* Empty function for now */
1031         return 0;
1032 }
1033
1034 static int gbcodec_write(struct snd_soc_codec *codec, unsigned int reg,
1035                          unsigned int value)
1036 {
1037         return 0;
1038 }
1039
1040 static unsigned int gbcodec_read(struct snd_soc_codec *codec,
1041                                  unsigned int reg)
1042 {
1043         return 0;
1044 }
1045
1046 static struct snd_soc_codec_driver soc_codec_dev_gbaudio = {
1047         .probe  = gbcodec_probe,
1048         .remove = gbcodec_remove,
1049
1050         .read = gbcodec_read,
1051         .write = gbcodec_write,
1052
1053         .idle_bias_off = true,
1054         .ignore_pmdown_time = 1,
1055 };
1056
1057 #ifdef CONFIG_PM
1058 static int gbaudio_codec_suspend(struct device *dev)
1059 {
1060         dev_dbg(dev, "%s: suspend\n", __func__);
1061         return 0;
1062 }
1063
1064 static int gbaudio_codec_resume(struct device *dev)
1065 {
1066         dev_dbg(dev, "%s: resume\n", __func__);
1067         return 0;
1068 }
1069
1070 static const struct dev_pm_ops gbaudio_codec_pm_ops = {
1071         .suspend        = gbaudio_codec_suspend,
1072         .resume         = gbaudio_codec_resume,
1073 };
1074 #endif
1075
1076 static int gbaudio_codec_probe(struct platform_device *pdev)
1077 {
1078         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_gbaudio,
1079                         gbaudio_dai, ARRAY_SIZE(gbaudio_dai));
1080 }
1081
1082 static int gbaudio_codec_remove(struct platform_device *pdev)
1083 {
1084         snd_soc_unregister_codec(&pdev->dev);
1085         return 0;
1086 }
1087
1088 static const struct of_device_id greybus_asoc_machine_of_match[]  = {
1089         { .compatible = "toshiba,apb-dummy-codec", },
1090         {},
1091 };
1092
1093 static struct platform_driver gbaudio_codec_driver = {
1094         .driver = {
1095                 .name = "apb-dummy-codec",
1096                 .owner = THIS_MODULE,
1097 #ifdef CONFIG_PM
1098                 .pm = &gbaudio_codec_pm_ops,
1099 #endif
1100                 .of_match_table = greybus_asoc_machine_of_match,
1101         },
1102         .probe = gbaudio_codec_probe,
1103         .remove = gbaudio_codec_remove,
1104 };
1105 module_platform_driver(gbaudio_codec_driver);
1106
1107 MODULE_DESCRIPTION("APBridge ALSA SoC dummy codec driver");
1108 MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
1109 MODULE_LICENSE("GPL v2");
1110 MODULE_ALIAS("platform:apb-dummy-codec");