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                 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         dev_dbg(dai->dev, "Mute:%d, Direction:%s\n", mute,
 592                 stream ? "CAPTURE" : "PLAYBACK");
 593
 594         mutex_lock(&codec->lock);
 595
 596         params = find_dai_stream_params(codec, dai->id, stream);
 597         if (!params) {
 598                 dev_err(codec->dev, "Failed to fetch dai_stream pointer\n");
 599                 mutex_unlock(&codec->lock);
 600                 return -EINVAL;
 601         }
 602
 603         if (list_empty(&codec->module_list)) {
 604                 dev_err(codec->dev, "No codec module available\n");
 605                 if (mute) {
 606                         params->state = GBAUDIO_CODEC_STOP;
 607                         ret = 0;
 608                 } else {
 609                         ret = -ENODEV;
 610                 }
 611                 mutex_unlock(&codec->lock);
 612                 return ret;
 613         }
 614
 615         list_for_each_entry(module, &codec->module_list, list) {
 616                 /* find the dai */
 617                 data = find_data(module, dai->id);
 618                 if (data)
 619                         break;
 620         }
 621         if (!data) {
 622                 dev_err(dai->dev, "%s:%s DATA connection missing\n",
 623                         dai->name, module->name);
 624                 mutex_unlock(&codec->lock);
 625                 return -ENODEV;
 626         }
 627
 628         bundle = to_gb_bundle(module->dev);
 629         ret = gb_pm_runtime_get_sync(bundle);
 630         if (ret) {
 631                 mutex_unlock(&codec->lock);
 632                 return ret;
 633         }
 634
 635         if (!mute && !stream) {/* start playback */
 636                 ret = gb_audio_apbridgea_prepare_tx(data->connection,
 637                                                     0);
 638                 if (!ret)
 639                         ret = gb_audio_apbridgea_start_tx(data->connection,
 640                                                           0, 0);
 641                 params->state = GBAUDIO_CODEC_START;
 642         } else if (!mute && stream) {/* start capture */
 643                 ret = gb_audio_apbridgea_prepare_rx(data->connection,
 644                                                     0);
 645                 if (!ret)
 646                         ret = gb_audio_apbridgea_start_rx(data->connection,
 647                                                           0);
 648                 params->state = GBAUDIO_CODEC_START;
 649         } else if (mute && !stream) {/* stop playback */
 650                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 651                 if (!ret)
 652                         ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 653                                                              0);
 654                 params->state = GBAUDIO_CODEC_STOP;
 655         } else if (mute && stream) {/* stop capture */
 656                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 657                 if (!ret)
 658                         ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 659                                                              0);
 660                 params->state = GBAUDIO_CODEC_STOP;
 661         } else {
 662                 ret = -EINVAL;
 663         }
 664
 665         if (ret)
 666                 dev_err_ratelimited(dai->dev,
 667                                     "%s:Error during %s %s stream:%d\n",
 668                                     module->name, mute ? "Mute" : "Unmute",
 669                                     stream ? "Capture" : "Playback", ret);
 670
 671         gb_pm_runtime_put_noidle(bundle);
 672         mutex_unlock(&codec->lock);
 673         return ret;
 674 }
 675
 676 static const struct snd_soc_dai_ops gbcodec_dai_ops = {
 677         .startup = gbcodec_startup,
 678         .shutdown = gbcodec_shutdown,
 679         .hw_params = gbcodec_hw_params,
 680         .prepare = gbcodec_prepare,
 681         .mute_stream = gbcodec_mute_stream,
 682 };
 683
 684 static struct snd_soc_dai_driver gbaudio_dai[] = {
 685         {
 686                 .name = "apb-i2s0",
 687                 .id = 0,
 688                 .playback = {
 689                         .stream_name = "I2S 0 Playback",
 690                         .rates = SNDRV_PCM_RATE_48000,
 691                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 692                         .rate_max = 48000,
 693                         .rate_min = 48000,
 694                         .channels_min = 1,
 695                         .channels_max = 2,
 696                         .sig_bits = 16,
 697                 },
 698                 .capture = {
 699                         .stream_name = "I2S 0 Capture",
 700                         .rates = SNDRV_PCM_RATE_48000,
 701                         .formats = SNDRV_PCM_FORMAT_S16_LE,
 702                         .rate_max = 48000,
 703                         .rate_min = 48000,
 704                         .channels_min = 1,
 705                         .channels_max = 2,
 706                         .sig_bits = 16,
 707                 },
 708                 .ops = &gbcodec_dai_ops,
 709         },
 710 };
 711
 712 static int gbaudio_init_jack(struct gbaudio_module_info *module,
 713                              struct snd_soc_card *card)
 714 {
 715         int ret;
 716         struct gbaudio_jack *jack, *n;
 717         struct snd_soc_jack_pin *headset, *button;
 718
 719         if (!module->jack_mask)
 720                 return 0;
 721
 722         snprintf(module->jack_name, NAME_SIZE, "GB %d Headset Jack",
 723                  module->dev_id);
 724
 725         headset = devm_kzalloc(module->dev, sizeof(*headset), GFP_KERNEL);
 726         if (!headset)
 727                 return -ENOMEM;
 728
 729         headset->pin = module->jack_name;
 730         headset->mask = module->jack_mask;
 731         ret = snd_soc_card_jack_new(card, module->jack_name, module->jack_mask,
 732                                     &module->headset.jack, headset, 1);
 733         if (ret) {
 734                 dev_err(module->dev, "Failed to create new jack\n");
 735                 return ret;
 736         }
 737
 738         /* Add to module's jack list */
 739         list_add(&module->headset.list, &module->jack_list);
 740
 741         if (!module->button_mask)
 742                 return 0;
 743
 744         snprintf(module->button_name, NAME_SIZE, "GB %d Button Jack",
 745                  module->dev_id);
 746         button = devm_kzalloc(module->dev, sizeof(*button), GFP_KERNEL);
 747         if (!button) {
 748                 ret = -ENOMEM;
 749                 goto free_jacks;
 750         }
 751
 752         button->pin = module->button_name;
 753         button->mask = module->button_mask;
 754         ret = snd_soc_card_jack_new(card, module->button_name,
 755                                     module->button_mask, &module->button.jack,
 756                                     button, 1);
 757         if (ret) {
 758                 dev_err(module->dev, "Failed to create button jack\n");
 759                 goto free_jacks;
 760         }
 761
 762         /* Add to module's jack list */
 763         list_add(&module->button.list, &module->jack_list);
 764
 765         /*
 766          * Currently, max 4 buttons are supported with following key mapping
 767          * BTN_0 = KEY_MEDIA
 768          * BTN_1 = KEY_VOICECOMMAND
 769          * BTN_2 = KEY_VOLUMEUP
 770          * BTN_3 = KEY_VOLUMEDOWN
 771          */
 772
 773         if (module->button_mask & SND_JACK_BTN_0) {
 774                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_0,
 775                                        KEY_MEDIA);
 776                 if (ret) {
 777                         dev_err(module->dev, "Failed to set BTN_0\n");
 778                         goto free_jacks;
 779                 }
 780         }
 781
 782         if (module->button_mask & SND_JACK_BTN_1) {
 783                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_1,
 784                                        KEY_VOICECOMMAND);
 785                 if (ret) {
 786                         dev_err(module->dev, "Failed to set BTN_1\n");
 787                         goto free_jacks;
 788                 }
 789         }
 790
 791         if (module->button_mask & SND_JACK_BTN_2) {
 792                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_2,
 793                                        KEY_VOLUMEUP);
 794                 if (ret) {
 795                         dev_err(module->dev, "Failed to set BTN_2\n");
 796                         goto free_jacks;
 797                 }
 798         }
 799
 800         if (module->button_mask & SND_JACK_BTN_3) {
 801                 ret = snd_jack_set_key(module->button.jack.jack, SND_JACK_BTN_3,
 802                                        KEY_VOLUMEDOWN);
 803                 if (ret) {
 804                         dev_err(module->dev, "Failed to set BTN_0\n");
 805                         goto free_jacks;
 806                 }
 807         }
 808
 809         /* FIXME
 810          * verify if this is really required
 811         set_bit(INPUT_PROP_NO_DUMMY_RELEASE,
 812                 module->button.jack.jack->input_dev->propbit);
 813         */
 814
 815         return 0;
 816
 817 free_jacks:
 818         list_for_each_entry_safe(jack, n, &module->jack_list, list) {
 819                 snd_device_free(card->snd_card, jack->jack.jack);
 820                 list_del(&jack->list);
 821         }
 822
 823         return ret;
 824 }
 825
 826 int gbaudio_register_module(struct gbaudio_module_info *module)
 827 {
 828         int ret;
 829         struct snd_soc_component *comp;
 830         struct snd_card *card;
 831         struct gbaudio_jack *jack = NULL;
 832
 833         if (!gbcodec) {
 834                 dev_err(module->dev, "GB Codec not yet probed\n");
 835                 return -EAGAIN;
 836         }
 837
 838         comp = gbcodec->component;
 839         card = comp->card->snd_card;
 840
 841         down_write(&card->controls_rwsem);
 842
 843         if (module->num_dais) {
 844                 dev_err(gbcodec->dev,
 845                         "%d:DAIs not supported via gbcodec driver\n",
 846                         module->num_dais);
 847                 up_write(&card->controls_rwsem);
 848                 return -EINVAL;
 849         }
 850
 851         ret = gbaudio_init_jack(module, comp->card);
 852         if (ret) {
 853                 up_write(&card->controls_rwsem);
 854                 return ret;
 855         }
 856
 857         if (module->dapm_widgets)
 858                 snd_soc_dapm_new_controls(&comp->dapm, module->dapm_widgets,
 859                                           module->num_dapm_widgets);
 860         if (module->controls)
 861                 snd_soc_add_component_controls(comp, module->controls,
 862                                                module->num_controls);
 863         if (module->dapm_routes)
 864                 snd_soc_dapm_add_routes(&comp->dapm, module->dapm_routes,
 865                                         module->num_dapm_routes);
 866
 867         /* card already instantiated, create widgets here only */
 868         if (comp->card->instantiated) {
 869                 gbaudio_dapm_link_component_dai_widgets(comp->card,
 870                                                         &comp->dapm);
 871 #ifdef CONFIG_SND_JACK
 872                 /*
 873                  * register jack devices for this module
 874                  * from codec->jack_list
 875                  */
 876                 list_for_each_entry(jack, &module->jack_list, list) {
 877                         snd_device_register(comp->card->snd_card,
 878                                             jack->jack.jack);
 879                 }
 880 #endif
 881         }
 882
 883         mutex_lock(&gbcodec->lock);
 884         list_add(&module->list, &gbcodec->module_list);
 885         mutex_unlock(&gbcodec->lock);
 886
 887         if (comp->card->instantiated)
 888                 ret = snd_soc_dapm_new_widgets(comp->card);
 889         dev_dbg(comp->dev, "Registered %s module\n", module->name);
 890
 891         up_write(&card->controls_rwsem);
 892         return ret;
 893 }
 894 EXPORT_SYMBOL(gbaudio_register_module);
 895
 896 static void gbaudio_codec_clean_data_tx(struct gbaudio_data_connection *data)
 897 {
 898         u16 i2s_port, cportid;
 899         int ret;
 900
 901         if (list_is_singular(&gbcodec->module_list)) {
 902                 ret = gb_audio_apbridgea_stop_tx(data->connection, 0);
 903                 if (ret)
 904                         return;
 905                 ret = gb_audio_apbridgea_shutdown_tx(data->connection,
 906                                                      0);
 907                 if (ret)
 908                         return;
 909         }
 910         i2s_port = 0;   /* fixed for now */
 911         cportid = data->connection->hd_cport_id;
 912         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 913                                                   i2s_port, cportid,
 914                                                   AUDIO_APBRIDGEA_DIRECTION_TX);
 915         data->state[0] = GBAUDIO_CODEC_SHUTDOWN;
 916 }
 917
 918 static void gbaudio_codec_clean_data_rx(struct gbaudio_data_connection *data)
 919 {
 920         u16 i2s_port, cportid;
 921         int ret;
 922
 923         if (list_is_singular(&gbcodec->module_list)) {
 924                 ret = gb_audio_apbridgea_stop_rx(data->connection, 0);
 925                 if (ret)
 926                         return;
 927                 ret = gb_audio_apbridgea_shutdown_rx(data->connection,
 928                                                      0);
 929                 if (ret)
 930                         return;
 931         }
 932         i2s_port = 0;   /* fixed for now */
 933         cportid = data->connection->hd_cport_id;
 934         ret = gb_audio_apbridgea_unregister_cport(data->connection,
 935                                                   i2s_port, cportid,
 936                                                   AUDIO_APBRIDGEA_DIRECTION_RX);
 937         data->state[1] = GBAUDIO_CODEC_SHUTDOWN;
 938 }
 939
 940 static void gbaudio_codec_cleanup(struct gbaudio_module_info *module)
 941 {
 942         struct gbaudio_data_connection *data;
 943         int pb_state, cap_state;
 944
 945         dev_dbg(gbcodec->dev, "%s: removed, cleanup APBridge\n", module->name);
 946         list_for_each_entry(data, &module->data_list, list) {
 947                 pb_state = data->state[0];
 948                 cap_state = data->state[1];
 949
 950                 if (pb_state > GBAUDIO_CODEC_SHUTDOWN)
 951                         gbaudio_codec_clean_data_tx(data);
 952
 953                 if (cap_state > GBAUDIO_CODEC_SHUTDOWN)
 954                         gbaudio_codec_clean_data_rx(data);
 955         }
 956 }
 957
 958 void gbaudio_unregister_module(struct gbaudio_module_info *module)
 959 {
 960         struct snd_soc_component *comp = gbcodec->component;
 961         struct snd_card *card = comp->card->snd_card;
 962         struct gbaudio_jack *jack, *n;
 963         int mask;
 964
 965         dev_dbg(comp->dev, "Unregister %s module\n", module->name);
 966
 967         down_write(&card->controls_rwsem);
 968         mutex_lock(&gbcodec->lock);
 969         gbaudio_codec_cleanup(module);
 970         list_del(&module->list);
 971         dev_dbg(comp->dev, "Process Unregister %s module\n", module->name);
 972         mutex_unlock(&gbcodec->lock);
 973
 974 #ifdef CONFIG_SND_JACK
 975         /* free jack devices for this module jack_list */
 976         list_for_each_entry_safe(jack, n, &module->jack_list, list) {
 977                 if (jack == &module->headset)
 978                         mask = GBCODEC_JACK_MASK;
 979                 else if (jack == &module->button)
 980                         mask = GBCODEC_JACK_BUTTON_MASK;
 981                 else
 982                         mask = 0;
 983                 if (mask) {
 984                         dev_dbg(module->dev, "Report %s removal\n",
 985                                 jack->jack.jack->id);
 986                         snd_soc_jack_report(&jack->jack, 0, mask);
 987                         snd_device_free(comp->card->snd_card,
 988                                         jack->jack.jack);
 989                         list_del(&jack->list);
 990                 }
 991         }
 992 #endif
 993
 994         if (module->dapm_routes) {
 995                 dev_dbg(comp->dev, "Removing %d routes\n",
 996                         module->num_dapm_routes);
 997                 snd_soc_dapm_del_routes(&comp->dapm, module->dapm_routes,
 998                                         module->num_dapm_routes);
 999         }
1000         if (module->controls) {
1001                 dev_dbg(comp->dev, "Removing %d controls\n",
1002                         module->num_controls);
1003                 /* release control semaphore */
1004                 up_write(&card->controls_rwsem);
1005                 gbaudio_remove_component_controls(comp, module->controls,
1006                                                   module->num_controls);
1007                 down_write(&card->controls_rwsem);
1008         }
1009         if (module->dapm_widgets) {
1010                 dev_dbg(comp->dev, "Removing %d widgets\n",
1011                         module->num_dapm_widgets);
1012                 gbaudio_dapm_free_controls(&comp->dapm, module->dapm_widgets,
1013                                            module->num_dapm_widgets);
1014         }
1015
1016         dev_dbg(comp->dev, "Unregistered %s module\n", module->name);
1017
1018         up_write(&card->controls_rwsem);
1019 }
1020 EXPORT_SYMBOL(gbaudio_unregister_module);
1021
1022 /*
1023  * component driver ops
1024  */
1025 static int gbcodec_probe(struct snd_soc_component *comp)
1026 {
1027         int i;
1028         struct gbaudio_codec_info *info;
1029         struct gbaudio_codec_dai *dai;
1030
1031         info = devm_kzalloc(comp->dev, sizeof(*info), GFP_KERNEL);
1032         if (!info)
1033                 return -ENOMEM;
1034
1035         info->dev = comp->dev;
1036         INIT_LIST_HEAD(&info->module_list);
1037         mutex_init(&info->lock);
1038         INIT_LIST_HEAD(&info->dai_list);
1039
1040         /* init dai_list used to maintain runtime stream info */
1041         for (i = 0; i < ARRAY_SIZE(gbaudio_dai); i++) {
1042                 dai = devm_kzalloc(comp->dev, sizeof(*dai), GFP_KERNEL);
1043                 if (!dai)
1044                         return -ENOMEM;
1045                 dai->id = gbaudio_dai[i].id;
1046                 list_add(&dai->list, &info->dai_list);
1047         }
1048
1049         info->component = comp;
1050         snd_soc_component_set_drvdata(comp, info);
1051         gbcodec = info;
1052
1053         device_init_wakeup(comp->dev, 1);
1054         return 0;
1055 }
1056
1057 static void gbcodec_remove(struct snd_soc_component *comp)
1058 {
1059         /* Empty function for now */
1060         return;
1061 }
1062
1063 static int gbcodec_write(struct snd_soc_component *comp, unsigned int reg,
1064                          unsigned int value)
1065 {
1066         return 0;
1067 }
1068
1069 static unsigned int gbcodec_read(struct snd_soc_component *comp,
1070                                  unsigned int reg)
1071 {
1072         return 0;
1073 }
1074
1075 static const struct snd_soc_component_driver soc_codec_dev_gbaudio = {
1076         .probe  = gbcodec_probe,
1077         .remove = gbcodec_remove,
1078
1079         .read = gbcodec_read,
1080         .write = gbcodec_write,
1081 };
1082
1083 #ifdef CONFIG_PM
1084 static int gbaudio_codec_suspend(struct device *dev)
1085 {
1086         dev_dbg(dev, "%s: suspend\n", __func__);
1087         return 0;
1088 }
1089
1090 static int gbaudio_codec_resume(struct device *dev)
1091 {
1092         dev_dbg(dev, "%s: resume\n", __func__);
1093         return 0;
1094 }
1095
1096 static const struct dev_pm_ops gbaudio_codec_pm_ops = {
1097         .suspend        = gbaudio_codec_suspend,
1098         .resume         = gbaudio_codec_resume,
1099 };
1100 #endif
1101
1102 static int gbaudio_codec_probe(struct platform_device *pdev)
1103 {
1104         return devm_snd_soc_register_component(&pdev->dev,
1105                         &soc_codec_dev_gbaudio,
1106                         gbaudio_dai, ARRAY_SIZE(gbaudio_dai));
1107 }
1108
1109 static int gbaudio_codec_remove(struct platform_device *pdev)
1110 {
1111         return 0;
1112 }
1113
1114 static const struct of_device_id greybus_asoc_machine_of_match[]  = {
1115         { .compatible = "toshiba,apb-dummy-codec", },
1116         {},
1117 };
1118
1119 static struct platform_driver gbaudio_codec_driver = {
1120         .driver = {
1121                 .name = "apb-dummy-codec",
1122 #ifdef CONFIG_PM
1123                 .pm = &gbaudio_codec_pm_ops,
1124 #endif
1125                 .of_match_table = greybus_asoc_machine_of_match,
1126         },
1127         .probe = gbaudio_codec_probe,
1128         .remove = gbaudio_codec_remove,
1129 };
1130 module_platform_driver(gbaudio_codec_driver);
1131
1132 MODULE_DESCRIPTION("APBridge ALSA SoC dummy codec driver");
1133 MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
1134 MODULE_LICENSE("GPL v2");
1135 MODULE_ALIAS("platform:apb-dummy-codec");