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