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 <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 /*
 183  * TODO: Implement the audio routing in the driver. Now this control
 184  * only indicates the setting that has been done elsewhere (in the user
 185  * space).
 186  */
 187 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
 188
 189 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
 190                                       struct snd_ctl_elem_value *ucontrol)
 191 {
 192         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 193         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 194
 195         if (wl1273->mode == ucontrol->value.integer.value[0])
 196                 return 0;
 197
 198         /* Do not allow changes while stream is running */
 199         if (codec->active)
 200                 return -EPERM;
 201
 202         if (ucontrol->value.integer.value[0] < 0 ||
 203             ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
 204                 return -EINVAL;
 205
 206         wl1273->mode = ucontrol->value.integer.value[0];
 207
 208         return 1;
 209 }
 210
 211 static const struct soc_enum wl1273_enum =
 212         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
 213
 214 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
 215                                    struct snd_ctl_elem_value *ucontrol)
 216 {
 217         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 218         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 219
 220         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 221
 222         ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
 223
 224         return 0;
 225 }
 226
 227 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
 228                                    struct snd_ctl_elem_value *ucontrol)
 229 {
 230         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 231         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 232         int val, r = 0;
 233
 234         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 235
 236         val = ucontrol->value.integer.value[0];
 237         if (wl1273->core->audio_mode == val)
 238                 return 0;
 239
 240         r = wl1273->core->set_audio(wl1273->core, val);
 241         if (r < 0)
 242                 return r;
 243
 244         return 1;
 245 }
 246
 247 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
 248
 249 static const struct soc_enum wl1273_audio_enum =
 250         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
 251                             wl1273_audio_strings);
 252
 253 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
 254                                     struct snd_ctl_elem_value *ucontrol)
 255 {
 256         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 257         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 258
 259         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 260
 261         ucontrol->value.integer.value[0] = wl1273->core->volume;
 262
 263         return 0;
 264 }
 265
 266 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
 267                                     struct snd_ctl_elem_value *ucontrol)
 268 {
 269         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 270         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 271         int r;
 272
 273         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 274
 275         r = wl1273->core->set_volume(wl1273->core,
 276                                      ucontrol->value.integer.value[0]);
 277         if (r)
 278                 return r;
 279
 280         return 1;
 281 }
 282
 283 static const struct snd_kcontrol_new wl1273_controls[] = {
 284         SOC_ENUM_EXT("Codec Mode", wl1273_enum,
 285                      snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
 286         SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
 287                      snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
 288         SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
 289                        snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
 290 };
 291
 292 static int wl1273_startup(struct snd_pcm_substream *substream,
 293                           struct snd_soc_dai *dai)
 294 {
 295         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 296         struct snd_soc_codec *codec = rtd->codec;
 297         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 298
 299         switch (wl1273->mode) {
 300         case WL1273_MODE_BT:
 301                 snd_pcm_hw_constraint_minmax(substream->runtime,
 302                                              SNDRV_PCM_HW_PARAM_RATE,
 303                                              8000, 8000);
 304                 snd_pcm_hw_constraint_minmax(substream->runtime,
 305                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
 306                 break;
 307         case WL1273_MODE_FM_RX:
 308                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 309                         pr_err("Cannot play in RX mode.\n");
 310                         return -EINVAL;
 311                 }
 312                 break;
 313         case WL1273_MODE_FM_TX:
 314                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 315                         pr_err("Cannot capture in TX mode.\n");
 316                         return -EINVAL;
 317                 }
 318                 break;
 319         default:
 320                 return -EINVAL;
 321                 break;
 322         }
 323
 324         return 0;
 325 }
 326
 327 static int wl1273_hw_params(struct snd_pcm_substream *substream,
 328                             struct snd_pcm_hw_params *params,
 329                             struct snd_soc_dai *dai)
 330 {
 331         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 332         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
 333         struct wl1273_core *core = wl1273->core;
 334         unsigned int rate, width, r;
 335
 336         if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
 337                 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
 338                 return -EINVAL;
 339         }
 340
 341         rate = params_rate(params);
 342         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
 343
 344         if (wl1273->mode == WL1273_MODE_BT) {
 345                 if (rate != 8000) {
 346                         pr_err("Rate %d not supported.\n", params_rate(params));
 347                         return -EINVAL;
 348                 }
 349
 350                 if (params_channels(params) != 1) {
 351                         pr_err("Only mono supported.\n");
 352                         return -EINVAL;
 353                 }
 354
 355                 return 0;
 356         }
 357
 358         if (wl1273->mode == WL1273_MODE_FM_TX &&
 359             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 360                 pr_err("Only playback supported with TX.\n");
 361                 return -EINVAL;
 362         }
 363
 364         if (wl1273->mode == WL1273_MODE_FM_RX  &&
 365             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 366                 pr_err("Only capture supported with RX.\n");
 367                 return -EINVAL;
 368         }
 369
 370         if (wl1273->mode != WL1273_MODE_FM_RX  &&
 371             wl1273->mode != WL1273_MODE_FM_TX) {
 372                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
 373                 return -EINVAL;
 374         }
 375
 376         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
 377         if (r)
 378                 return r;
 379
 380         wl1273->channels = params_channels(params);
 381         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
 382         if (r)
 383                 return r;
 384
 385         return 0;
 386 }
 387
 388 static struct snd_soc_dai_ops wl1273_dai_ops = {
 389         .startup        = wl1273_startup,
 390         .hw_params      = wl1273_hw_params,
 391 };
 392
 393 static struct snd_soc_dai_driver wl1273_dai = {
 394         .name = "wl1273-fm",
 395         .playback = {
 396                 .stream_name = "Playback",
 397                 .channels_min = 1,
 398                 .channels_max = 2,
 399                 .rates = SNDRV_PCM_RATE_8000_48000,
 400                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 401         .capture = {
 402                 .stream_name = "Capture",
 403                 .channels_min = 1,
 404                 .channels_max = 2,
 405                 .rates = SNDRV_PCM_RATE_8000_48000,
 406                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 407         .ops = &wl1273_dai_ops,
 408 };
 409
 410 /* Audio interface format for the soc_card driver */
 411 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
 412 {
 413         struct wl1273_priv *wl1273;
 414
 415         if (codec == NULL || fmt == NULL)
 416                 return -EINVAL;
 417
 418         wl1273 = snd_soc_codec_get_drvdata(codec);
 419
 420         switch (wl1273->mode) {
 421         case WL1273_MODE_FM_RX:
 422         case WL1273_MODE_FM_TX:
 423                 *fmt =  SND_SOC_DAIFMT_I2S |
 424                         SND_SOC_DAIFMT_NB_NF |
 425                         SND_SOC_DAIFMT_CBM_CFM;
 426
 427                 break;
 428         case WL1273_MODE_BT:
 429                 *fmt =  SND_SOC_DAIFMT_DSP_A |
 430                         SND_SOC_DAIFMT_IB_NF |
 431                         SND_SOC_DAIFMT_CBM_CFM;
 432
 433                 break;
 434         default:
 435                 return -EINVAL;
 436         }
 437
 438         return 0;
 439 }
 440 EXPORT_SYMBOL_GPL(wl1273_get_format);
 441
 442 static int wl1273_probe(struct snd_soc_codec *codec)
 443 {
 444         struct wl1273_core **core = codec->dev->platform_data;
 445         struct wl1273_priv *wl1273;
 446         int r;
 447
 448         dev_dbg(codec->dev, "%s.\n", __func__);
 449
 450         if (!core) {
 451                 dev_err(codec->dev, "Platform data is missing.\n");
 452                 return -EINVAL;
 453         }
 454
 455         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
 456         if (wl1273 == NULL) {
 457                 dev_err(codec->dev, "Cannot allocate memory.\n");
 458                 return -ENOMEM;
 459         }
 460
 461         wl1273->mode = WL1273_MODE_BT;
 462         wl1273->core = *core;
 463
 464         snd_soc_codec_set_drvdata(codec, wl1273);
 465         mutex_init(&codec->mutex);
 466
 467         r = snd_soc_add_controls(codec, wl1273_controls,
 468                                  ARRAY_SIZE(wl1273_controls));
 469         if (r)
 470                 kfree(wl1273);
 471
 472         return r;
 473 }
 474
 475 static int wl1273_remove(struct snd_soc_codec *codec)
 476 {
 477         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 478
 479         dev_dbg(codec->dev, "%s\n", __func__);
 480         kfree(wl1273);
 481
 482         return 0;
 483 }
 484
 485 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
 486         .probe = wl1273_probe,
 487         .remove = wl1273_remove,
 488 };
 489
 490 static int __devinit wl1273_platform_probe(struct platform_device *pdev)
 491 {
 492         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
 493                                       &wl1273_dai, 1);
 494 }
 495
 496 static int __devexit wl1273_platform_remove(struct platform_device *pdev)
 497 {
 498         snd_soc_unregister_codec(&pdev->dev);
 499         return 0;
 500 }
 501
 502 MODULE_ALIAS("platform:wl1273-codec");
 503
 504 static struct platform_driver wl1273_platform_driver = {
 505         .driver         = {
 506                 .name   = "wl1273-codec",
 507                 .owner  = THIS_MODULE,
 508         },
 509         .probe          = wl1273_platform_probe,
 510         .remove         = __devexit_p(wl1273_platform_remove),
 511 };
 512
 513 static int __init wl1273_init(void)
 514 {
 515         return platform_driver_register(&wl1273_platform_driver);
 516 }
 517 module_init(wl1273_init);
 518
 519 static void __exit wl1273_exit(void)
 520 {
 521         platform_driver_unregister(&wl1273_platform_driver);
 522 }
 523 module_exit(wl1273_exit);
 524
 525 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
 526 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
 527 MODULE_LICENSE("GPL");