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                 mutex_unlock(&codec->lock);
 494                 return ret;
 495         }
 496
 497         gb_pm_runtime_put_noidle(bundle);
 498
 499         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 500                 sig_bits = dai->driver->playback.sig_bits;
 501         else
 502                 sig_bits = dai->driver->capture.sig_bits;
 503
 504         params->state = GBAUDIO_CODEC_HWPARAMS;
 505         params->format = format;
 506         params->rate = rate;
 507         params->channels = channels;
 508         params->sig_bits = sig_bits;
 509
 510         mutex_unlock(&codec->lock);
 511         return 0;
 512 }
 513
 514 static int gbcodec_prepare(struct snd_pcm_substream *substream,
 515                            struct snd_soc_dai *dai)
 516 {
 517         int ret;
 518         struct gbaudio_module_info *module;
 519         struct gbaudio_data_connection *data;
 520         struct gb_bundle *bundle;
 521         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 522         struct gbaudio_stream_params *params;
 523
 524         mutex_lock(&codec->lock);
 525
 526         if (list_empty(&codec->module_list)) {
 527                 dev_err(codec->dev, "No codec module available\n");
 528                 mutex_unlock(&codec->lock);
 529                 return -ENODEV;
 530         }
 531
 532         list_for_each_entry(module, &codec->module_list, list) {
 533                 /* find the dai */
 534                 data = find_data(module, dai->id);
 535                 if (data)
 536                         break;
 537         }
 538         if (!data) {
 539                 dev_err(dai->dev, "DATA connection missing\n");
 540                 mutex_unlock(&codec->lock);
 541                 return -ENODEV;
 542         }
 543
 544         params = find_dai_stream_params(codec, dai->id, substream->stream);
 545         if (!params) {
 546                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 547                 mutex_unlock(&codec->lock);
 548                 return -EINVAL;
 549         }
 550
 551         bundle = to_gb_bundle(module->dev);
 552         ret = gb_pm_runtime_get_sync(bundle);
 553         if (ret) {
 554                 mutex_unlock(&codec->lock);
 555                 return ret;
 556         }
 557
 558         switch (substream->stream) {
 559         case SNDRV_PCM_STREAM_PLAYBACK:
 560                 ret = gb_audio_apbridgea_set_tx_data_size(data->connection, 0,
 561                                                           192);
 562                 break;
 563         case SNDRV_PCM_STREAM_CAPTURE:
 564                 ret = gb_audio_apbridgea_set_rx_data_size(data->connection, 0,
 565                                                           192);
 566                 break;
 567         }
 568         if (ret) {
 569                 mutex_unlock(&codec->lock);
 570                 dev_err_ratelimited(dai->dev, "set_data_size failed:%d\n",
 571                                      ret);
 572                 return ret;
 573         }
 574
 575         gb_pm_runtime_put_noidle(bundle);
 576
 577         params->state = GBAUDIO_CODEC_PREPARE;
 578         mutex_unlock(&codec->lock);
 579         return 0;
 580 }
 581
 582 static int gbcodec_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
 583 {
 584         int ret;
 585         struct gbaudio_data_connection *data;
 586         struct gbaudio_module_info *module;
 587         struct gb_bundle *bundle;
 588         struct gbaudio_codec_info *codec = dev_get_drvdata(dai->dev);
 589         struct gbaudio_stream_params *params;
 590
 591
 592         dev_dbg(dai->dev, "Mute:%d, Direction:%s\n", mute,
 593                 stream ? "CAPTURE":"PLAYBACK");
 594
 595         mutex_lock(&codec->lock);
 596
 597         params = find_dai_stream_params(codec, dai->id, stream);
 598         if (!params) {
 599                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 600                 mutex_unlock(&codec->lock);
 601                 return -EINVAL;
 602         }
 603
 604         if (list_empty(&codec->module_list)) {
 605                 dev_err(codec->dev, "No codec module available\n");
 606                 if (mute) {
 607                         params->state = GBAUDIO_CODEC_STOP;
 608                         ret = 0;
 609                 } else {
 610                         ret = -ENODEV;
 611                 }
 612                 mutex_unlock(&codec->lock);
 613                 return ret;
 614         }
 615
 616         list_for_each_entry(module, &codec->module_list, list) {
 617                 /* find the dai */
 618                 data = find_data(module, dai->id);
 619                 if (data)
 620                         break;
 621         }
 622         if (!data) {
 623                 dev_err(dai->dev, "%s:%s DATA connection missing\n",
 624                         dai->name, module->name);
 625                 mutex_unlock(&codec->lock);
 626                 return -ENODEV;
 627         }
 628
 629         bundle = to_gb_bundle(module->dev);
 630         ret = gb_pm_runtime_get_sync(bundle);
 631         if (ret) {
 632                 mutex_unlock(&codec->lock);
 633                 return ret;
 634         }
 635
 636         if (!mute && !stream) {/* start playback */
 637                 ret = gb_audio_apbridgea_prepare_tx(data->connection,
 638                                                     0);
 639                 if (!ret)
 640                         ret = gb_audio_apbridgea_start_tx(data->connection,
 641                                                           0, 0);
 642                 params->state = GBAUDIO_CODEC_START;
 643         } else if (!mute && stream) {/* start capture */
 644                 ret = gb_audio_apbridgea_prepare_rx(data->connection,
 645                                                     0);
 646                 if (!ret)
 647                         ret = gb_audio_apbridgea_start_rx(data->connection,
 648                                                           0);
 649                 params->state = GBAUDIO_CODEC_START;
 650         } else if (mute && !stream) {/* stop playback */
 651                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 652                 if (!ret)
 653                         ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 654                                                              0);
 655                 params->state = GBAUDIO_CODEC_STOP;
 656         } else if (mute && stream) {/* stop capture */
 657                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 658                 if (!ret)
 659                         ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 660                                                              0);
 661                 params->state = GBAUDIO_CODEC_STOP;
 662         } else {
 663                 ret = -EINVAL;
 664         }
 665
 666         if (ret)
 667                 dev_err_ratelimited(dai->dev,
 668                                     "%s:Error during %s %s stream:%d\n",
 669                                     module->name, mute ? "Mute" : "Unmute",
 670                                     stream ? "Capture" : "Playback", ret);
 671
 672         gb_pm_runtime_put_noidle(bundle);
 673         mutex_unlock(&codec->lock);
 674         return ret;
 675 }
 676
 677 static struct snd_soc_dai_ops gbcodec_dai_ops = {
 678         .startup = gbcodec_startup,
 679         .shutdown = gbcodec_shutdown,
 680         .hw_params = gbcodec_hw_params,
 681         .prepare = gbcodec_prepare,
 682         .mute_stream = gbcodec_mute_stream,
 683 };
 684
 685 static struct snd_soc_dai_driver gbaudio_dai[] = {
 686         {
 687                 .name = "apb-i2s0",
 688                 .id = 0,
 689                 .playback = {
 690                         .stream_name = "I2S 0 Playback",
 691                         .rates = SNDRV_PCM_RATE_48000,
 692                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 693                         .rate_max = 48000,
 694                         .rate_min = 48000,
 695                         .channels_min = 1,
 696                         .channels_max = 2,
 697                         .sig_bits = 16,
 698                 },
 699                 .capture = {
 700                         .stream_name = "I2S 0 Capture",
 701                         .rates = SNDRV_PCM_RATE_48000,
 702                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 703                         .rate_max = 48000,
 704                         .rate_min = 48000,
 705                         .channels_min = 1,
 706                         .channels_max = 2,
 707                         .sig_bits = 16,
 708                 },
 709                 .ops = &gbcodec_dai_ops,
 710         },
 711 };
 712
 713 static int gbaudio_init_jack(struct gbaudio_module_info *module,
 714                              struct snd_soc_codec *codec)
 715 {
 716         int ret;
 717
 718         if (!module->jack_mask)
 719                 return 0;
 720
 721         snprintf(module->jack_name, NAME_SIZE, "GB %d Headset Jack",
 722                  module->dev_id);
 723         ret = snd_soc_jack_new(codec, module->jack_name, module->jack_mask,
 724                                &module->headset_jack);
 725         if (ret) {
 726                 dev_err(module->dev, "Failed to create new jack\n");
 727                 return ret;
 728         }
 729
 730         if (!module->button_mask)
 731                 return 0;
 732
 733         snprintf(module->button_name, NAME_SIZE, "GB %d Button Jack",
 734                  module->dev_id);
 735         ret = snd_soc_jack_new(codec, module->button_name, module->button_mask,
 736                                &module->button_jack);
 737         if (ret) {
 738                 dev_err(module->dev, "Failed to create button jack\n");
 739                 return ret;
 740         }
 741
 742         /*
 743          * Currently, max 4 buttons are supported with following key mapping
 744          * BTN_0 = KEY_MEDIA
 745          * BTN_1 = KEY_VOICECOMMAND
 746          * BTN_2 = KEY_VOLUMEUP
 747          * BTN_3 = KEY_VOLUMEDOWN
 748          */
 749
 750         if (module->button_mask & SND_JACK_BTN_0) {
 751                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_0,
 752                                        KEY_MEDIA);
 753                 if (ret) {
 754                         dev_err(module->dev, "Failed to set BTN_0\n");
 755                         return ret;
 756                 }
 757         }
 758
 759         if (module->button_mask & SND_JACK_BTN_1) {
 760                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_1,
 761                                        KEY_VOICECOMMAND);
 762                 if (ret) {
 763                         dev_err(module->dev, "Failed to set BTN_1\n");
 764                         return ret;
 765                 }
 766         }
 767
 768         if (module->button_mask & SND_JACK_BTN_2) {
 769                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_2,
 770                                        KEY_VOLUMEUP);
 771                 if (ret) {
 772                         dev_err(module->dev, "Failed to set BTN_2\n");
 773                         return ret;
 774                 }
 775         }
 776
 777         if (module->button_mask & SND_JACK_BTN_3) {
 778                 ret = snd_jack_set_key(module->button_jack.jack, SND_JACK_BTN_3,
 779                                        KEY_VOLUMEDOWN);
 780                 if (ret) {
 781                         dev_err(module->dev, "Failed to set BTN_0\n");
 782                         return ret;
 783                 }
 784         }
 785
 786         /* FIXME
 787          * verify if this is really required
 788         set_bit(INPUT_PROP_NO_DUMMY_RELEASE,
 789                 module->button_jack.jack->input_dev->propbit);
 790         */
 791
 792         return 0;
 793 }
 794
 795 int gbaudio_register_module(struct gbaudio_module_info *module)
 796 {
 797         int ret;
 798         struct snd_soc_codec *codec;
 799         struct snd_card *card;
 800         struct snd_soc_jack *jack = NULL;
 801
 802         if (!gbcodec) {
 803                 dev_err(module->dev, "GB Codec not yet probed\n");
 804                 return -EAGAIN;
 805         }
 806
 807         codec = gbcodec->codec;
 808         card = codec->card->snd_card;
 809
 810         down_write(&card->controls_rwsem);
 811
 812         if (module->num_dais) {
 813                 dev_err(gbcodec->dev,
 814                         "%d:DAIs not supported via gbcodec driver\n",
 815                         module->num_dais);
 816                 up_write(&card->controls_rwsem);
 817                 return -EINVAL;
 818         }
 819
 820         ret = gbaudio_init_jack(module, codec);
 821         if (ret) {
 822                 up_write(&card->controls_rwsem);
 823                 return ret;
 824         }
 825
 826         if (module->dapm_widgets)
 827                 snd_soc_dapm_new_controls(&codec->dapm, module->dapm_widgets,
 828                                           module->num_dapm_widgets);
 829         if (module->controls)
 830                 snd_soc_add_codec_controls(codec, module->controls,
 831                                      module->num_controls);
 832         if (module->dapm_routes)
 833                 snd_soc_dapm_add_routes(&codec->dapm, module->dapm_routes,
 834                                         module->num_dapm_routes);
 835
 836         /* card already instantiated, create widgets here only */
 837         if (codec->card->instantiated) {
 838                 snd_soc_dapm_link_component_dai_widgets(codec->card,
 839                                                         &codec->dapm);
 840 #ifdef CONFIG_SND_JACK
 841                 /*
 842                  * register jack devices for this module
 843                  * from codec->jack_list
 844                  */
 845                 list_for_each_entry(jack, &codec->jack_list, list) {
 846                         if ((jack == &module->headset_jack)
 847                             || (jack == &module->button_jack))
 848                                 snd_device_register(codec->card->snd_card,
 849                                                     jack->jack);
 850                 }
 851 #endif
 852         }
 853
 854         mutex_lock(&gbcodec->lock);
 855         list_add(&module->list, &gbcodec->module_list);
 856         mutex_unlock(&gbcodec->lock);
 857
 858         if (codec->card->instantiated)
 859                 ret = snd_soc_dapm_new_widgets(&codec->dapm);
 860         dev_dbg(codec->dev, "Registered %s module\n", module->name);
 861
 862         up_write(&card->controls_rwsem);
 863         return ret;
 864 }
 865 EXPORT_SYMBOL(gbaudio_register_module);
 866
 867 static void gbaudio_codec_clean_data_tx(struct gbaudio_data_connection *data)
 868 {
 869         u16 i2s_port, cportid;
 870         int ret;
 871
 872         if (list_is_singular(&gbcodec->module_list)) {
 873                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 874                 if (ret)
 875                         return;
 876                 ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 877                                                      0);
 878                 if (ret)
 879                         return;
 880         }
 881         i2s_port = 0;   /* fixed for now */
 882         cportid = data->connection->hd_cport_id;
 883         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 884                                                   i2s_port, cportid,
 885                                                   AUDIO_APBRIDGEA_DIRECTION_TX);
 886         data->state[0] = GBAUDIO_CODEC_SHUTDOWN;
 887 }
 888
 889 static void gbaudio_codec_clean_data_rx(struct gbaudio_data_connection *data)
 890 {
 891         u16 i2s_port, cportid;
 892         int ret;
 893
 894         if (list_is_singular(&gbcodec->module_list)) {
 895                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 896                 if (ret)
 897                         return;
 898                 ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 899                                                      0);
 900                 if (ret)
 901                         return;
 902         }
 903         i2s_port = 0;   /* fixed for now */
 904         cportid = data->connection->hd_cport_id;
 905         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 906                                                   i2s_port, cportid,
 907                                                   AUDIO_APBRIDGEA_DIRECTION_RX);
 908         data->state[1] = GBAUDIO_CODEC_SHUTDOWN;
 909 }
 910
 911
 912 static void gbaudio_codec_cleanup(struct gbaudio_module_info *module)
 913 {
 914         struct gbaudio_data_connection *data;
 915         int pb_state, cap_state;
 916
 917         dev_dbg(gbcodec->dev, "%s: removed, cleanup APBridge\n", module->name);
 918         list_for_each_entry(data, &module->data_list, list) {
 919                 pb_state = data->state[0];
 920                 cap_state = data->state[1];
 921
 922                 if (pb_state > GBAUDIO_CODEC_SHUTDOWN)
 923                         gbaudio_codec_clean_data_tx(data);
 924
 925                 if (cap_state > GBAUDIO_CODEC_SHUTDOWN)
 926                         gbaudio_codec_clean_data_rx(data);
 927
 928         }
 929 }
 930
 931 void gbaudio_unregister_module(struct gbaudio_module_info *module)
 932 {
 933         struct snd_soc_codec *codec = gbcodec->codec;
 934         struct snd_card *card = codec->card->snd_card;
 935         struct snd_soc_jack *jack, *next_j;
 936         int mask;
 937
 938         dev_dbg(codec->dev, "Unregister %s module\n", module->name);
 939
 940         down_write(&card->controls_rwsem);
 941         mutex_lock(&gbcodec->lock);
 942         gbaudio_codec_cleanup(module);
 943         list_del(&module->list);
 944         dev_dbg(codec->dev, "Process Unregister %s module\n", module->name);
 945         mutex_unlock(&gbcodec->lock);
 946
 947 #ifdef CONFIG_SND_JACK
 948         /* free jack devices for this module from codec->jack_list */
 949         list_for_each_entry_safe(jack, next_j, &codec->jack_list, list) {
 950                 if (jack == &module->headset_jack)
 951                         mask = GBCODEC_JACK_MASK;
 952                 else if (jack == &module->button_jack)
 953                         mask = GBCODEC_JACK_BUTTON_MASK;
 954                 else
 955                         mask = 0;
 956                 if (mask) {
 957                         dev_dbg(module->dev, "Report %s removal\n",
 958                                 jack->jack->id);
 959                         snd_soc_jack_report(jack, 0, mask);
 960                         snd_device_free(codec->card->snd_card, jack->jack);
 961                         list_del(&jack->list);
 962                 }
 963         }
 964 #endif
 965
 966         if (module->dapm_routes) {
 967                 dev_dbg(codec->dev, "Removing %d routes\n",
 968                         module->num_dapm_routes);
 969                 snd_soc_dapm_del_routes(&codec->dapm, module->dapm_routes,
 970                                         module->num_dapm_routes);
 971         }
 972         if (module->controls) {
 973                 dev_dbg(codec->dev, "Removing %d controls\n",
 974                         module->num_controls);
 975                 snd_soc_remove_codec_controls(codec, module->controls,
 976                                           module->num_controls);
 977         }
 978         if (module->dapm_widgets) {
 979                 dev_dbg(codec->dev, "Removing %d widgets\n",
 980                         module->num_dapm_widgets);
 981                 snd_soc_dapm_free_controls(&codec->dapm, module->dapm_widgets,
 982                                            module->num_dapm_widgets);
 983         }
 984
 985         dev_dbg(codec->dev, "Unregistered %s module\n", module->name);
 986
 987         up_write(&card->controls_rwsem);
 988 }
 989 EXPORT_SYMBOL(gbaudio_unregister_module);
 990
 991 /*
 992  * codec driver ops
 993  */
 994 static int gbcodec_probe(struct snd_soc_codec *codec)
 995 {
 996         int i;
 997         struct gbaudio_codec_info *info;
 998         struct gbaudio_codec_dai *dai;
 999
1000         info = devm_kzalloc(codec->dev, sizeof(*info), GFP_KERNEL);
1001         if (!info)
1002                 return -ENOMEM;
1003
1004         info->dev = codec->dev;
1005         INIT_LIST_HEAD(&info->module_list);
1006         mutex_init(&info->lock);
1007         INIT_LIST_HEAD(&info->dai_list);
1008
1009         /* init dai_list used to maintain runtime stream info */
1010         for (i = 0; i < ARRAY_SIZE(gbaudio_dai); i++) {
1011                 dai = devm_kzalloc(codec->dev, sizeof(*dai), GFP_KERNEL);
1012                 if (!dai)
1013                         return -ENOMEM;
1014                 dai->id = gbaudio_dai[i].id;
1015                 list_add(&dai->list, &info->dai_list);
1016         }
1017
1018         info->codec = codec;
1019         snd_soc_codec_set_drvdata(codec, info);
1020         gbcodec = info;
1021
1022         device_init_wakeup(codec->dev, 1);
1023         return 0;
1024 }
1025
1026 static int gbcodec_remove(struct snd_soc_codec *codec)
1027 {
1028         /* Empty function for now */
1029         return 0;
1030 }
1031
1032 static int gbcodec_write(struct snd_soc_codec *codec, unsigned int reg,
1033                          unsigned int value)
1034 {
1035         return 0;
1036 }
1037
1038 static unsigned int gbcodec_read(struct snd_soc_codec *codec,
1039                                  unsigned int reg)
1040 {
1041         return 0;
1042 }
1043
1044 static struct snd_soc_codec_driver soc_codec_dev_gbaudio = {
1045         .probe  = gbcodec_probe,
1046         .remove = gbcodec_remove,
1047
1048         .read = gbcodec_read,
1049         .write = gbcodec_write,
1050
1051         .idle_bias_off = true,
1052         .ignore_pmdown_time = 1,
1053 };
1054
1055 #ifdef CONFIG_PM
1056 static int gbaudio_codec_suspend(struct device *dev)
1057 {
1058         dev_dbg(dev, "%s: suspend\n", __func__);
1059         return 0;
1060 }
1061
1062 static int gbaudio_codec_resume(struct device *dev)
1063 {
1064         dev_dbg(dev, "%s: resume\n", __func__);
1065         return 0;
1066 }
1067
1068 static const struct dev_pm_ops gbaudio_codec_pm_ops = {
1069         .suspend        = gbaudio_codec_suspend,
1070         .resume         = gbaudio_codec_resume,
1071 };
1072 #endif
1073
1074 static int gbaudio_codec_probe(struct platform_device *pdev)
1075 {
1076         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_gbaudio,
1077                         gbaudio_dai, ARRAY_SIZE(gbaudio_dai));
1078 }
1079
1080 static int gbaudio_codec_remove(struct platform_device *pdev)
1081 {
1082         snd_soc_unregister_codec(&pdev->dev);
1083         return 0;
1084 }
1085
1086 static const struct of_device_id greybus_asoc_machine_of_match[]  = {
1087         { .compatible = "toshiba,apb-dummy-codec", },
1088         {},
1089 };
1090
1091 static struct platform_driver gbaudio_codec_driver = {
1092         .driver = {
1093                 .name = "apb-dummy-codec",
1094                 .owner = THIS_MODULE,
1095 #ifdef CONFIG_PM
1096                 .pm = &gbaudio_codec_pm_ops,
1097 #endif
1098                 .of_match_table = greybus_asoc_machine_of_match,
1099         },
1100         .probe = gbaudio_codec_probe,
1101         .remove = gbaudio_codec_remove,
1102 };
1103 module_platform_driver(gbaudio_codec_driver);
1104
1105 MODULE_DESCRIPTION("APBridge ALSA SoC dummy codec driver");
1106 MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
1107 MODULE_LICENSE("GPL v2");
1108 MODULE_ALIAS("platform:apb-dummy-codec");