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Linux/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         .controls = wl1273_controls,
488         .num_controls = ARRAY_SIZE(wl1273_controls),
489         .dapm_widgets = wl1273_dapm_widgets,
490         .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
491         .dapm_routes = wl1273_dapm_routes,
492         .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
493 };
494 
495 static int wl1273_platform_probe(struct platform_device *pdev)
496 {
497         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
498                                       &wl1273_dai, 1);
499 }
500 
501 static int wl1273_platform_remove(struct platform_device *pdev)
502 {
503         snd_soc_unregister_codec(&pdev->dev);
504         return 0;
505 }
506 
507 MODULE_ALIAS("platform:wl1273-codec");
508 
509 static struct platform_driver wl1273_platform_driver = {
510         .driver         = {
511                 .name   = "wl1273-codec",
512         },
513         .probe          = wl1273_platform_probe,
514         .remove         = wl1273_platform_remove,
515 };
516 
517 module_platform_driver(wl1273_platform_driver);
518 
519 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
520 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
521 MODULE_LICENSE("GPL");
522 

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