sound/soc/codecs/wl1273.c

   1 /*
   2  * ALSA SoC WL1273 codec driver
   3  *
   4  * Author:      Matti Aaltonen, <matti.j.aaltonen@nokia.com>
   5  *
   6  * Copyright:   (C) 2010, 2011 Nokia Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/mfd/wl1273-core.h>
  25 #include <linux/slab.h>
  26 #include <linux/module.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include <sound/soc.h>
  30 #include <sound/initval.h>
  31
  32 #include "wl1273.h"
  33
  34 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
  35
  36 /* codec private data */
  37 struct wl1273_priv {
  38         enum wl1273_mode mode;
  39         struct wl1273_core *core;
  40         unsigned int channels;
  41 };
  42
  43 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
  44                                       int rate, int width)
  45 {
  46         struct device *dev = &core->client->dev;
  47         int r = 0;
  48         u16 mode;
  49
  50         dev_dbg(dev, "rate: %d\n", rate);
  51         dev_dbg(dev, "width: %d\n", width);
  52
  53         mutex_lock(&core->lock);
  54
  55         mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
  56
  57         switch (rate) {
  58         case 48000:
  59                 mode |= WL1273_IS2_RATE_48K;
  60                 break;
  61         case 44100:
  62                 mode |= WL1273_IS2_RATE_44_1K;
  63                 break;
  64         case 32000:
  65                 mode |= WL1273_IS2_RATE_32K;
  66                 break;
  67         case 22050:
  68                 mode |= WL1273_IS2_RATE_22_05K;
  69                 break;
  70         case 16000:
  71                 mode |= WL1273_IS2_RATE_16K;
  72                 break;
  73         case 12000:
  74                 mode |= WL1273_IS2_RATE_12K;
  75                 break;
  76         case 11025:
  77                 mode |= WL1273_IS2_RATE_11_025;
  78                 break;
  79         case 8000:
  80                 mode |= WL1273_IS2_RATE_8K;
  81                 break;
  82         default:
  83                 dev_err(dev, "Sampling rate: %d not supported\n", rate);
  84                 r = -EINVAL;
  85                 goto out;
  86         }
  87
  88         switch (width) {
  89         case 16:
  90                 mode |= WL1273_IS2_WIDTH_32;
  91                 break;
  92         case 20:
  93                 mode |= WL1273_IS2_WIDTH_40;
  94                 break;
  95         case 24:
  96                 mode |= WL1273_IS2_WIDTH_48;
  97                 break;
  98         case 25:
  99                 mode |= WL1273_IS2_WIDTH_50;
 100                 break;
 101         case 30:
 102                 mode |= WL1273_IS2_WIDTH_60;
 103                 break;
 104         case 32:
 105                 mode |= WL1273_IS2_WIDTH_64;
 106                 break;
 107         case 40:
 108                 mode |= WL1273_IS2_WIDTH_80;
 109                 break;
 110         case 48:
 111                 mode |= WL1273_IS2_WIDTH_96;
 112                 break;
 113         case 64:
 114                 mode |= WL1273_IS2_WIDTH_128;
 115                 break;
 116         default:
 117                 dev_err(dev, "Data width: %d not supported\n", width);
 118                 r = -EINVAL;
 119                 goto out;
 120         }
 121
 122         dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n",  WL1273_I2S_DEF_MODE);
 123         dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
 124         dev_dbg(dev, "mode: 0x%04x\n", mode);
 125
 126         if (core->i2s_mode != mode) {
 127                 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
 128                 if (r)
 129                         goto out;
 130
 131                 core->i2s_mode = mode;
 132                 r = core->write(core, WL1273_AUDIO_ENABLE,
 133                                 WL1273_AUDIO_ENABLE_I2S);
 134                 if (r)
 135                         goto out;
 136         }
 137 out:
 138         mutex_unlock(&core->lock);
 139
 140         return r;
 141 }
 142
 143 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
 144                                             int channel_number)
 145 {
 146         struct device *dev = &core->client->dev;
 147         int r = 0;
 148
 149         dev_dbg(dev, "%s\n", __func__);
 150
 151         mutex_lock(&core->lock);
 152
 153         if (core->channel_number == channel_number)
 154                 goto out;
 155
 156         if (channel_number == 1 && core->mode == WL1273_MODE_RX)
 157                 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
 158         else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
 159                 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
 160         else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
 161                 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
 162         else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
 163                 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
 164         else
 165                 r = -EINVAL;
 166 out:
 167         mutex_unlock(&core->lock);
 168
 169         return r;
 170 }
 171
 172 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
 173                                       struct snd_ctl_elem_value *ucontrol)
 174 {
 175         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 176         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 177
 178         ucontrol->value.enumerated.item[0] = wl1273->mode;
 179
 180         return 0;
 181 }
 182
 183 /*
 184  * TODO: Implement the audio routing in the driver. Now this control
 185  * only indicates the setting that has been done elsewhere (in the user
 186  * space).
 187  */
 188 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
 189
 190 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
 191                                       struct snd_ctl_elem_value *ucontrol)
 192 {
 193         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 194         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 195
 196         if (wl1273->mode == ucontrol->value.enumerated.item[0])
 197                 return 0;
 198
 199         /* Do not allow changes while stream is running */
 200         if (snd_soc_codec_is_active(codec))
 201                 return -EPERM;
 202
 203         if (ucontrol->value.enumerated.item[0] >=  ARRAY_SIZE(wl1273_audio_route))
 204                 return -EINVAL;
 205
 206         wl1273->mode = ucontrol->value.enumerated.item[0];
 207
 208         return 1;
 209 }
 210
 211 static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route);
 212
 213 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
 214                                    struct snd_ctl_elem_value *ucontrol)
 215 {
 216         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 217         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 218
 219         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 220
 221         ucontrol->value.enumerated.item[0] = wl1273->core->audio_mode;
 222
 223         return 0;
 224 }
 225
 226 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
 227                                    struct snd_ctl_elem_value *ucontrol)
 228 {
 229         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 230         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 231         int val, r = 0;
 232
 233         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 234
 235         val = ucontrol->value.enumerated.item[0];
 236         if (wl1273->core->audio_mode == val)
 237                 return 0;
 238
 239         r = wl1273->core->set_audio(wl1273->core, val);
 240         if (r < 0)
 241                 return r;
 242
 243         return 1;
 244 }
 245
 246 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
 247
 248 static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings);
 249
 250 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
 251                                     struct snd_ctl_elem_value *ucontrol)
 252 {
 253         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 254         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 255
 256         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 257
 258         ucontrol->value.integer.value[0] = wl1273->core->volume;
 259
 260         return 0;
 261 }
 262
 263 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
 264                                     struct snd_ctl_elem_value *ucontrol)
 265 {
 266         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 267         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 268         int r;
 269
 270         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 271
 272         r = wl1273->core->set_volume(wl1273->core,
 273                                      ucontrol->value.integer.value[0]);
 274         if (r)
 275                 return r;
 276
 277         return 1;
 278 }
 279
 280 static const struct snd_kcontrol_new wl1273_controls[] = {
 281         SOC_ENUM_EXT("Codec Mode", wl1273_enum,
 282                      snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
 283         SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
 284                      snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
 285         SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
 286                        snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
 287 };
 288
 289 static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
 290         SND_SOC_DAPM_INPUT("RX"),
 291
 292         SND_SOC_DAPM_OUTPUT("TX"),
 293 };
 294
 295 static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
 296         { "Capture", NULL, "RX" },
 297
 298         { "TX", NULL, "Playback" },
 299 };
 300
 301 static int wl1273_startup(struct snd_pcm_substream *substream,
 302                           struct snd_soc_dai *dai)
 303 {
 304         struct snd_soc_codec *codec = dai->codec;
 305         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 306
 307         switch (wl1273->mode) {
 308         case WL1273_MODE_BT:
 309                 snd_pcm_hw_constraint_single(substream->runtime,
 310                                              SNDRV_PCM_HW_PARAM_RATE, 8000);
 311                 snd_pcm_hw_constraint_single(substream->runtime,
 312                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1);
 313                 break;
 314         case WL1273_MODE_FM_RX:
 315                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 316                         pr_err("Cannot play in RX mode.\n");
 317                         return -EINVAL;
 318                 }
 319                 break;
 320         case WL1273_MODE_FM_TX:
 321                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 322                         pr_err("Cannot capture in TX mode.\n");
 323                         return -EINVAL;
 324                 }
 325                 break;
 326         default:
 327                 return -EINVAL;
 328                 break;
 329         }
 330
 331         return 0;
 332 }
 333
 334 static int wl1273_hw_params(struct snd_pcm_substream *substream,
 335                             struct snd_pcm_hw_params *params,
 336                             struct snd_soc_dai *dai)
 337 {
 338         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
 339         struct wl1273_core *core = wl1273->core;
 340         unsigned int rate, width, r;
 341
 342         if (params_width(params) != 16) {
 343                 dev_err(dai->dev, "%d bits/sample not supported\n",
 344                         params_width(params));
 345                 return -EINVAL;
 346         }
 347
 348         rate = params_rate(params);
 349         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
 350
 351         if (wl1273->mode == WL1273_MODE_BT) {
 352                 if (rate != 8000) {
 353                         pr_err("Rate %d not supported.\n", params_rate(params));
 354                         return -EINVAL;
 355                 }
 356
 357                 if (params_channels(params) != 1) {
 358                         pr_err("Only mono supported.\n");
 359                         return -EINVAL;
 360                 }
 361
 362                 return 0;
 363         }
 364
 365         if (wl1273->mode == WL1273_MODE_FM_TX &&
 366             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 367                 pr_err("Only playback supported with TX.\n");
 368                 return -EINVAL;
 369         }
 370
 371         if (wl1273->mode == WL1273_MODE_FM_RX  &&
 372             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 373                 pr_err("Only capture supported with RX.\n");
 374                 return -EINVAL;
 375         }
 376
 377         if (wl1273->mode != WL1273_MODE_FM_RX  &&
 378             wl1273->mode != WL1273_MODE_FM_TX) {
 379                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
 380                 return -EINVAL;
 381         }
 382
 383         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
 384         if (r)
 385                 return r;
 386
 387         wl1273->channels = params_channels(params);
 388         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
 389         if (r)
 390                 return r;
 391
 392         return 0;
 393 }
 394
 395 static const struct snd_soc_dai_ops wl1273_dai_ops = {
 396         .startup        = wl1273_startup,
 397         .hw_params      = wl1273_hw_params,
 398 };
 399
 400 static struct snd_soc_dai_driver wl1273_dai = {
 401         .name = "wl1273-fm",
 402         .playback = {
 403                 .stream_name = "Playback",
 404                 .channels_min = 1,
 405                 .channels_max = 2,
 406                 .rates = SNDRV_PCM_RATE_8000_48000,
 407                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 408         .capture = {
 409                 .stream_name = "Capture",
 410                 .channels_min = 1,
 411                 .channels_max = 2,
 412                 .rates = SNDRV_PCM_RATE_8000_48000,
 413                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 414         .ops = &wl1273_dai_ops,
 415 };
 416
 417 /* Audio interface format for the soc_card driver */
 418 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
 419 {
 420         struct wl1273_priv *wl1273;
 421
 422         if (codec == NULL || fmt == NULL)
 423                 return -EINVAL;
 424
 425         wl1273 = snd_soc_codec_get_drvdata(codec);
 426
 427         switch (wl1273->mode) {
 428         case WL1273_MODE_FM_RX:
 429         case WL1273_MODE_FM_TX:
 430                 *fmt =  SND_SOC_DAIFMT_I2S |
 431                         SND_SOC_DAIFMT_NB_NF |
 432                         SND_SOC_DAIFMT_CBM_CFM;
 433
 434                 break;
 435         case WL1273_MODE_BT:
 436                 *fmt =  SND_SOC_DAIFMT_DSP_A |
 437                         SND_SOC_DAIFMT_IB_NF |
 438                         SND_SOC_DAIFMT_CBM_CFM;
 439
 440                 break;
 441         default:
 442                 return -EINVAL;
 443         }
 444
 445         return 0;
 446 }
 447 EXPORT_SYMBOL_GPL(wl1273_get_format);
 448
 449 static int wl1273_probe(struct snd_soc_codec *codec)
 450 {
 451         struct wl1273_core **core = codec->dev->platform_data;
 452         struct wl1273_priv *wl1273;
 453
 454         dev_dbg(codec->dev, "%s.\n", __func__);
 455
 456         if (!core) {
 457                 dev_err(codec->dev, "Platform data is missing.\n");
 458                 return -EINVAL;
 459         }
 460
 461         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
 462         if (!wl1273)
 463                 return -ENOMEM;
 464
 465         wl1273->mode = WL1273_MODE_BT;
 466         wl1273->core = *core;
 467
 468         snd_soc_codec_set_drvdata(codec, wl1273);
 469
 470         return 0;
 471 }
 472
 473 static int wl1273_remove(struct snd_soc_codec *codec)
 474 {
 475         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 476
 477         dev_dbg(codec->dev, "%s\n", __func__);
 478         kfree(wl1273);
 479
 480         return 0;
 481 }
 482
 483 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
 484         .probe = wl1273_probe,
 485         .remove = wl1273_remove,
 486
 487         .component_driver = {
 488                 .controls               = wl1273_controls,
 489                 .num_controls           = ARRAY_SIZE(wl1273_controls),
 490                 .dapm_widgets           = wl1273_dapm_widgets,
 491                 .num_dapm_widgets       = ARRAY_SIZE(wl1273_dapm_widgets),
 492                 .dapm_routes            = wl1273_dapm_routes,
 493                 .num_dapm_routes        = ARRAY_SIZE(wl1273_dapm_routes),
 494         },
 495 };
 496
 497 static int wl1273_platform_probe(struct platform_device *pdev)
 498 {
 499         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
 500                                       &wl1273_dai, 1);
 501 }
 502
 503 static int wl1273_platform_remove(struct platform_device *pdev)
 504 {
 505         snd_soc_unregister_codec(&pdev->dev);
 506         return 0;
 507 }
 508
 509 MODULE_ALIAS("platform:wl1273-codec");
 510
 511 static struct platform_driver wl1273_platform_driver = {
 512         .driver         = {
 513                 .name   = "wl1273-codec",
 514         },
 515         .probe          = wl1273_platform_probe,
 516         .remove         = wl1273_platform_remove,
 517 };
 518
 519 module_platform_driver(wl1273_platform_driver);
 520
 521 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
 522 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
 523 MODULE_LICENSE("GPL");