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-dai.h>
  29 #include <sound/soc-dapm.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->i2c_dev->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 = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET, mode);
 128                 if (r)
 129                         goto out;
 130
 131                 core->i2s_mode = mode;
 132                 r = wl1273_fm_write_cmd(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 i2c_client *client = core->i2c_dev;
 147         struct device *dev = &client->dev;
 148         int r = 0;
 149
 150         dev_dbg(dev, "%s\n", __func__);
 151
 152         mutex_lock(&core->lock);
 153
 154         if (core->channel_number == channel_number)
 155                 goto out;
 156
 157         if (channel_number == 1 && core->mode == WL1273_MODE_RX)
 158                 r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
 159                                         WL1273_RX_MONO);
 160         else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
 161                 r = wl1273_fm_write_cmd(core, WL1273_MONO_SET,
 162                                         WL1273_TX_MONO);
 163         else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
 164                 r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
 165                                         WL1273_RX_STEREO);
 166         else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
 167                 r = wl1273_fm_write_cmd(core, WL1273_MONO_SET,
 168                                         WL1273_TX_STEREO);
 169         else
 170                 r = -EINVAL;
 171 out:
 172         mutex_unlock(&core->lock);
 173
 174         return r;
 175 }
 176
 177 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
 178                                       struct snd_ctl_elem_value *ucontrol)
 179 {
 180         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 181         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 182
 183         ucontrol->value.integer.value[0] = wl1273->mode;
 184
 185         return 0;
 186 }
 187
 188 static const char *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_kcontrol_chip(kcontrol);
 194         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 195
 196         /* Do not allow changes while stream is running */
 197         if (codec->active)
 198                 return -EPERM;
 199
 200         if (ucontrol->value.integer.value[0] < 0 ||
 201             ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
 202                 return -EINVAL;
 203
 204         wl1273->mode = ucontrol->value.integer.value[0];
 205
 206         return 1;
 207 }
 208
 209 static const struct soc_enum wl1273_enum =
 210         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
 211
 212 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
 213                                    struct snd_ctl_elem_value *ucontrol)
 214 {
 215         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 216         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 217
 218         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 219
 220         ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
 221
 222         return 0;
 223 }
 224
 225 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
 226                                    struct snd_ctl_elem_value *ucontrol)
 227 {
 228         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 229         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 230         int val, r = 0;
 231
 232         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 233
 234         val = ucontrol->value.integer.value[0];
 235         if (wl1273->core->audio_mode == val)
 236                 return 0;
 237
 238         r = wl1273_fm_set_audio(wl1273->core, val);
 239         if (r < 0)
 240                 return r;
 241
 242         return 1;
 243 }
 244
 245 static const char *wl1273_audio_strings[] = { "Digital", "Analog" };
 246
 247 static const struct soc_enum wl1273_audio_enum =
 248         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
 249                             wl1273_audio_strings);
 250
 251 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
 252                                     struct snd_ctl_elem_value *ucontrol)
 253 {
 254         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 255         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 256
 257         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 258
 259         ucontrol->value.integer.value[0] = wl1273->core->volume;
 260
 261         return 0;
 262 }
 263
 264 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
 265                                     struct snd_ctl_elem_value *ucontrol)
 266 {
 267         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 268         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 269         int r;
 270
 271         dev_dbg(codec->dev, "%s: enter.\n", __func__);
 272
 273         r = wl1273_fm_set_volume(wl1273->core,
 274                                  ucontrol->value.integer.value[0]);
 275         if (r)
 276                 return r;
 277
 278         return 1;
 279 }
 280
 281 static const struct snd_kcontrol_new wl1273_controls[] = {
 282         SOC_ENUM_EXT("Codec Mode", wl1273_enum,
 283                      snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
 284         SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
 285                      snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
 286         SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
 287                        snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
 288 };
 289
 290 static int wl1273_startup(struct snd_pcm_substream *substream,
 291                           struct snd_soc_dai *dai)
 292 {
 293         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 294         struct snd_soc_codec *codec = rtd->codec;
 295         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
 296
 297         switch (wl1273->mode) {
 298         case WL1273_MODE_BT:
 299                 snd_pcm_hw_constraint_minmax(substream->runtime,
 300                                              SNDRV_PCM_HW_PARAM_RATE,
 301                                              8000, 8000);
 302                 snd_pcm_hw_constraint_minmax(substream->runtime,
 303                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
 304                 break;
 305         case WL1273_MODE_FM_RX:
 306                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 307                         pr_err("Cannot play in RX mode.\n");
 308                         return -EINVAL;
 309                 }
 310                 break;
 311         case WL1273_MODE_FM_TX:
 312                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 313                         pr_err("Cannot capture in TX mode.\n");
 314                         return -EINVAL;
 315                 }
 316                 break;
 317         default:
 318                 return -EINVAL;
 319                 break;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int wl1273_hw_params(struct snd_pcm_substream *substream,
 326                             struct snd_pcm_hw_params *params,
 327                             struct snd_soc_dai *dai)
 328 {
 329         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 330         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
 331         struct wl1273_core *core = wl1273->core;
 332         unsigned int rate, width, r;
 333
 334         if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
 335                 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
 336                 return -EINVAL;
 337         }
 338
 339         rate = params_rate(params);
 340         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
 341
 342         if (wl1273->mode == WL1273_MODE_BT) {
 343                 if (rate != 8000) {
 344                         pr_err("Rate %d not supported.\n", params_rate(params));
 345                         return -EINVAL;
 346                 }
 347
 348                 if (params_channels(params) != 1) {
 349                         pr_err("Only mono supported.\n");
 350                         return -EINVAL;
 351                 }
 352
 353                 return 0;
 354         }
 355
 356         if (wl1273->mode == WL1273_MODE_FM_TX &&
 357             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
 358                 pr_err("Only playback supported with TX.\n");
 359                 return -EINVAL;
 360         }
 361
 362         if (wl1273->mode == WL1273_MODE_FM_RX  &&
 363             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 364                 pr_err("Only capture supported with RX.\n");
 365                 return -EINVAL;
 366         }
 367
 368         if (wl1273->mode != WL1273_MODE_FM_RX  &&
 369             wl1273->mode != WL1273_MODE_FM_TX) {
 370                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
 371                 return -EINVAL;
 372         }
 373
 374         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
 375         if (r)
 376                 return r;
 377
 378         wl1273->channels = params_channels(params);
 379         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
 380         if (r)
 381                 return r;
 382
 383         return 0;
 384 }
 385
 386 static struct snd_soc_dai_ops wl1273_dai_ops = {
 387         .startup        = wl1273_startup,
 388         .hw_params      = wl1273_hw_params,
 389 };
 390
 391 static struct snd_soc_dai_driver wl1273_dai = {
 392         .name = "wl1273-fm",
 393         .playback = {
 394                 .stream_name = "Playback",
 395                 .channels_min = 1,
 396                 .channels_max = 2,
 397                 .rates = SNDRV_PCM_RATE_8000_48000,
 398                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 399         .capture = {
 400                 .stream_name = "Capture",
 401                 .channels_min = 1,
 402                 .channels_max = 2,
 403                 .rates = SNDRV_PCM_RATE_8000_48000,
 404                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
 405         .ops = &wl1273_dai_ops,
 406 };
 407
 408 /* Audio interface format for the soc_card driver */
 409 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
 410 {
 411         struct wl1273_priv *wl1273;
 412
 413         if (codec == NULL || fmt == NULL)
 414                 return -EINVAL;
 415
 416         wl1273 = snd_soc_codec_get_drvdata(codec);
 417
 418         switch (wl1273->mode) {
 419         case WL1273_MODE_FM_RX:
 420         case WL1273_MODE_FM_TX:
 421                 *fmt =  SND_SOC_DAIFMT_I2S |
 422                         SND_SOC_DAIFMT_NB_NF |
 423                         SND_SOC_DAIFMT_CBM_CFM;
 424
 425                 break;
 426         case WL1273_MODE_BT:
 427                 *fmt =  SND_SOC_DAIFMT_DSP_A |
 428                         SND_SOC_DAIFMT_IB_NF |
 429                         SND_SOC_DAIFMT_CBM_CFM;
 430
 431                 break;
 432         default:
 433                 return -EINVAL;
 434         }
 435
 436         return 0;
 437 }
 438 EXPORT_SYMBOL_GPL(wl1273_get_format);
 439
 440 static int wl1273_probe(struct snd_soc_codec *codec)
 441 {
 442         struct wl1273_core **core = codec->dev->platform_data;
 443         struct wl1273_priv *wl1273;
 444         int r;
 445
 446         dev_dbg(codec->dev, "%s.\n", __func__);
 447
 448         if (!core) {
 449                 dev_err(codec->dev, "Platform data is missing.\n");
 450                 return -EINVAL;
 451         }
 452
 453         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
 454         if (wl1273 == NULL) {
 455                 dev_err(codec->dev, "Cannot allocate memory.\n");
 456                 return -ENOMEM;
 457         }
 458
 459         wl1273->mode = WL1273_MODE_BT;
 460         wl1273->core = *core;
 461
 462         snd_soc_codec_set_drvdata(codec, wl1273);
 463         mutex_init(&codec->mutex);
 464
 465         r = snd_soc_add_controls(codec, wl1273_controls,
 466                                  ARRAY_SIZE(wl1273_controls));
 467         if (r)
 468                 kfree(wl1273);
 469
 470         return r;
 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
 488 static int __devinit wl1273_platform_probe(struct platform_device *pdev)
 489 {
 490         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
 491                                       &wl1273_dai, 1);
 492 }
 493
 494 static int __devexit wl1273_platform_remove(struct platform_device *pdev)
 495 {
 496         snd_soc_unregister_codec(&pdev->dev);
 497         return 0;
 498 }
 499
 500 MODULE_ALIAS("platform:wl1273-codec");
 501
 502 static struct platform_driver wl1273_platform_driver = {
 503         .driver         = {
 504                 .name   = "wl1273-codec",
 505                 .owner  = THIS_MODULE,
 506         },
 507         .probe          = wl1273_platform_probe,
 508         .remove         = __devexit_p(wl1273_platform_remove),
 509 };
 510
 511 static int __init wl1273_init(void)
 512 {
 513         return platform_driver_register(&wl1273_platform_driver);
 514 }
 515 module_init(wl1273_init);
 516
 517 static void __exit wl1273_exit(void)
 518 {
 519         platform_driver_unregister(&wl1273_platform_driver);
 520 }
 521 module_exit(wl1273_exit);
 522
 523 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
 524 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
 525 MODULE_LICENSE("GPL");