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 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 <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30
  31 #include "wl1273.h"
  32
  33 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
  34
  35 /* codec private data */
  36 struct wl1273_priv {
  37         enum wl1273_mode mode;
  38         struct wl1273_core *core;
  39         unsigned int channels;
  40 };
  41
  42 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
  43                                       int rate, int width)
  44 {
  45         struct device *dev = &core->client->dev;
  46         int r = 0;
  47         u16 mode;
  48
  49         dev_dbg(dev, "rate: %d\n", rate);
  50         dev_dbg(dev, "width: %d\n", width);
  51
  52         mutex_lock(&core->lock);
  53
  54         mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
  55
  56         switch (rate) {
  57         case 48000:
  58                 mode |= WL1273_IS2_RATE_48K;
  59                 break;
  60         case 44100:
  61                 mode |= WL1273_IS2_RATE_44_1K;
  62                 break;
  63         case 32000:
  64                 mode |= WL1273_IS2_RATE_32K;
  65                 break;
  66         case 22050:
  67                 mode |= WL1273_IS2_RATE_22_05K;
  68                 break;
  69         case 16000:
  70                 mode |= WL1273_IS2_RATE_16K;
  71                 break;
  72         case 12000:
  73                 mode |= WL1273_IS2_RATE_12K;
  74                 break;
  75         case 11025:
  76                 mode |= WL1273_IS2_RATE_11_025;
  77                 break;
  78         case 8000:
  79                 mode |= WL1273_IS2_RATE_8K;
  80                 break;
  81         default:
  82                 dev_err(dev, "Sampling rate: %d not supported\n", rate);
  83                 r = -EINVAL;
  84                 goto out;
  85         }
  86
  87         switch (width) {
  88         case 16:
  89                 mode |= WL1273_IS2_WIDTH_32;
  90                 break;
  91         case 20:
  92                 mode |= WL1273_IS2_WIDTH_40;
  93                 break;
  94         case 24:
  95                 mode |= WL1273_IS2_WIDTH_48;
  96                 break;
  97         case 25:
  98                 mode |= WL1273_IS2_WIDTH_50;
  99                 break;
 100         case 30:
 101                 mode |= WL1273_IS2_WIDTH_60;
 102                 break;
 103         case 32:
 104                 mode |= WL1273_IS2_WIDTH_64;
 105                 break;
 106         case 40:
 107                 mode |= WL1273_IS2_WIDTH_80;
 108                 break;
 109         case 48:
 110                 mode |= WL1273_IS2_WIDTH_96;
 111                 break;
 112         case 64:
 113                 mode |= WL1273_IS2_WIDTH_128;
 114                 break;
 115         default:
 116                 dev_err(dev, "Data width: %d not supported\n", width);
 117                 r = -EINVAL;
 118                 goto out;
 119         }
 120
 121         dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n",  WL1273_I2S_DEF_MODE);
 122         dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
 123         dev_dbg(dev, "mode: 0x%04x\n", mode);
 124
 125         if (core->i2s_mode != mode) {
 126                 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
 127                 if (r)
 128                         goto out;
 129
 130                 core->i2s_mode = mode;
 131                 r = core->write(core, WL1273_AUDIO_ENABLE,
 132                                 WL1273_AUDIO_ENABLE_I2S);
 133                 if (r)
 134                         goto out;
 135         }
 136 out:
 137         mutex_unlock(&core->lock);
 138
 139         return r;
 140 }
 141
 142 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
 143                                             int channel_number)
 144 {
 145         struct device *dev = &core->client->dev;
 146         int r = 0;
 147
 148         dev_dbg(dev, "%s\n", __func__);
 149
 150         mutex_lock(&core->lock);
 151
 152         if (core->channel_number == channel_number)
 153                 goto out;
 154
 155         if (channel_number == 1 && core->mode == WL1273_MODE_RX)
 156                 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
 157         else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
 158                 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
 159         else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
 160                 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
 161         else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
 162                 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
 163         else
 164                 r = -EINVAL;
 165 out:
 166         mutex_unlock(&core->lock);
 167
 168         return r;
 169 }
 170
 171 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
 172                                       struct snd_ctl_elem_value *ucontrol)
 173 {
 174         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 175         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 176
 177         ucontrol->value.integer.value[0] = wl1273->mode;
 178
 179         return 0;
 180 }
 181
 182 static const char *wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
 183
 184 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
 185                                       struct snd_ctl_elem_value *ucontrol)
 186 {
 187         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 188         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 189
 190         if (wl1273->mode == ucontrol->value.integer.value[0])
 191                 return 0;
 192
 193         /* Do not allow changes while stream is running */
 194         if (codec->active)
 195                 return -EPERM;
 196
 197         if (ucontrol->value.integer.value[0] < 0 ||
 198             ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
 199                 return -EINVAL;
 200
 201         wl1273->mode = ucontrol->value.integer.value[0];
 202
 203         return 1;
 204 }
 205
 206 static const struct soc_enum wl1273_enum =
 207         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
 208
 209 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
 210                                    struct snd_ctl_elem_value *ucontrol)
 211 {
 212         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 213         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 214
 215         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 216
 217         ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
 218
 219         return 0;
 220 }
 221
 222 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
 223                                    struct snd_ctl_elem_value *ucontrol)
 224 {
 225         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 226         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 227         int val, r = 0;
 228
 229         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 230
 231         val = ucontrol->value.integer.value[0];
 232         if (wl1273->core->audio_mode == val)
 233                 return 0;
 234
 235         r = wl1273->core->set_audio(wl1273->core, val);
 236         if (r < 0)
 237                 return r;
 238
 239         return 1;
 240 }
 241
 242 static const char *wl1273_audio_strings[] = { "Digital", "Analog" };
 243
 244 static const struct soc_enum wl1273_audio_enum =
 245         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
 246                             wl1273_audio_strings);
 247
 248 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
 249                                     struct snd_ctl_elem_value *ucontrol)
 250 {
 251         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 252         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 253
 254         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 255
 256         ucontrol->value.integer.value[0] = wl1273->core->volume;
 257
 258         return 0;
 259 }
 260
 261 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
 262                                     struct snd_ctl_elem_value *ucontrol)
 263 {
 264         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 265         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 266         int r;
 267
 268         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 269
 270         r = wl1273->core->set_volume(wl1273->core,
 271                                      ucontrol->value.integer.value[0]);
 272         if (r)
 273                 return r;
 274
 275         return 1;
 276 }
 277
 278 static const struct snd_kcontrol_new wl1273_controls[] = {
 279         SOC_ENUM_EXT("Codec Mode", wl1273_enum,
 280                      snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
 281         SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
 282                      snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
 283         SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
 284                        snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
 285 };
 286
 287 static int wl1273_startup(struct snd_pcm_substream *substream,
 288                           struct snd_soc_dai *dai)
 289 {
 290         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 291         struct snd_soc_codec *codec = rtd->codec;
 292         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 293
 294         switch (wl1273->mode) {
 295         case WL1273_MODE_BT:
 296                 snd_pcm_hw_constraint_minmax(substream->runtime,
 297                                              SNDRV_PCM_HW_PARAM_RATE,
 298                                              8000, 8000);
 299                 snd_pcm_hw_constraint_minmax(substream->runtime,
 300                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
 301                 break;
 302         case WL1273_MODE_FM_RX:
 303                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 304                         pr_err("Cannot play in RX mode.\n");
 305                         return -EINVAL;
 306                 }
 307                 break;
 308         case WL1273_MODE_FM_TX:
 309                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 310                         pr_err("Cannot capture in TX mode.\n");
 311                         return -EINVAL;
 312                 }
 313                 break;
 314         default:
 315                 return -EINVAL;
 316                 break;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int wl1273_hw_params(struct snd_pcm_substream *substream,
 323                             struct snd_pcm_hw_params *params,
 324                             struct snd_soc_dai *dai)
 325 {
 326         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 327         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
 328         struct wl1273_core *core = wl1273->core;
 329         unsigned int rate, width, r;
 330
 331         if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
 332                 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
 333                 return -EINVAL;
 334         }
 335
 336         rate = params_rate(params);
 337         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
 338
 339         if (wl1273->mode == WL1273_MODE_BT) {
 340                 if (rate != 8000) {
 341                         pr_err("Rate %d not supported.\n", params_rate(params));
 342                         return -EINVAL;
 343                 }
 344
 345                 if (params_channels(params) != 1) {
 346                         pr_err("Only mono supported.\n");
 347                         return -EINVAL;
 348                 }
 349
 350                 return 0;
 351         }
 352
 353         if (wl1273->mode == WL1273_MODE_FM_TX &&
 354             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 355                 pr_err("Only playback supported with TX.\n");
 356                 return -EINVAL;
 357         }
 358
 359         if (wl1273->mode == WL1273_MODE_FM_RX  &&
 360             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 361                 pr_err("Only capture supported with RX.\n");
 362                 return -EINVAL;
 363         }
 364
 365         if (wl1273->mode != WL1273_MODE_FM_RX  &&
 366             wl1273->mode != WL1273_MODE_FM_TX) {
 367                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
 368                 return -EINVAL;
 369         }
 370
 371         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
 372         if (r)
 373                 return r;
 374
 375         wl1273->channels = params_channels(params);
 376         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
 377         if (r)
 378                 return r;
 379
 380         return 0;
 381 }
 382
 383 static struct snd_soc_dai_ops wl1273_dai_ops = {
 384         .startup        = wl1273_startup,
 385         .hw_params      = wl1273_hw_params,
 386 };
 387
 388 static struct snd_soc_dai_driver wl1273_dai = {
 389         .name = "wl1273-fm",
 390         .playback = {
 391                 .stream_name = "Playback",
 392                 .channels_min = 1,
 393                 .channels_max = 2,
 394                 .rates = SNDRV_PCM_RATE_8000_48000,
 395                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 396         .capture = {
 397                 .stream_name = "Capture",
 398                 .channels_min = 1,
 399                 .channels_max = 2,
 400                 .rates = SNDRV_PCM_RATE_8000_48000,
 401                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 402         .ops = &wl1273_dai_ops,
 403 };
 404
 405 /* Audio interface format for the soc_card driver */
 406 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
 407 {
 408         struct wl1273_priv *wl1273;
 409
 410         if (codec == NULL || fmt == NULL)
 411                 return -EINVAL;
 412
 413         wl1273 = snd_soc_codec_get_drvdata(codec);
 414
 415         switch (wl1273->mode) {
 416         case WL1273_MODE_FM_RX:
 417         case WL1273_MODE_FM_TX:
 418                 *fmt =  SND_SOC_DAIFMT_I2S |
 419                         SND_SOC_DAIFMT_NB_NF |
 420                         SND_SOC_DAIFMT_CBM_CFM;
 421
 422                 break;
 423         case WL1273_MODE_BT:
 424                 *fmt =  SND_SOC_DAIFMT_DSP_A |
 425                         SND_SOC_DAIFMT_IB_NF |
 426                         SND_SOC_DAIFMT_CBM_CFM;
 427
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         return 0;
 434 }
 435 EXPORT_SYMBOL_GPL(wl1273_get_format);
 436
 437 static int wl1273_probe(struct snd_soc_codec *codec)
 438 {
 439         struct wl1273_core **core = codec->dev->platform_data;
 440         struct wl1273_priv *wl1273;
 441         int r;
 442
 443         dev_dbg(codec->dev, "%s.\n", __func__);
 444
 445         if (!core) {
 446                 dev_err(codec->dev, "Platform data is missing.\n");
 447                 return -EINVAL;
 448         }
 449
 450         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
 451         if (wl1273 == NULL) {
 452                 dev_err(codec->dev, "Cannot allocate memory.\n");
 453                 return -ENOMEM;
 454         }
 455
 456         wl1273->mode = WL1273_MODE_BT;
 457         wl1273->core = *core;
 458
 459         snd_soc_codec_set_drvdata(codec, wl1273);
 460         mutex_init(&codec->mutex);
 461
 462         r = snd_soc_add_controls(codec, wl1273_controls,
 463                                  ARRAY_SIZE(wl1273_controls));
 464         if (r)
 465                 kfree(wl1273);
 466
 467         return r;
 468 }
 469
 470 static int wl1273_remove(struct snd_soc_codec *codec)
 471 {
 472         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 473
 474         dev_dbg(codec->dev, "%s\n", __func__);
 475         kfree(wl1273);
 476
 477         return 0;
 478 }
 479
 480 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
 481         .probe = wl1273_probe,
 482         .remove = wl1273_remove,
 483 };
 484
 485 static int __devinit wl1273_platform_probe(struct platform_device *pdev)
 486 {
 487         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
 488                                       &wl1273_dai, 1);
 489 }
 490
 491 static int __devexit wl1273_platform_remove(struct platform_device *pdev)
 492 {
 493         snd_soc_unregister_codec(&pdev->dev);
 494         return 0;
 495 }
 496
 497 MODULE_ALIAS("platform:wl1273-codec");
 498
 499 static struct platform_driver wl1273_platform_driver = {
 500         .driver         = {
 501                 .name   = "wl1273-codec",
 502                 .owner  = THIS_MODULE,
 503         },
 504         .probe          = wl1273_platform_probe,
 505         .remove         = __devexit_p(wl1273_platform_remove),
 506 };
 507
 508 static int __init wl1273_init(void)
 509 {
 510         return platform_driver_register(&wl1273_platform_driver);
 511 }
 512 module_init(wl1273_init);
 513
 514 static void __exit wl1273_exit(void)
 515 {
 516         platform_driver_unregister(&wl1273_platform_driver);
 517 }
 518 module_exit(wl1273_exit);
 519
 520 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
 521 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
 522 MODULE_LICENSE("GPL");