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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_kcontrol_chip(kcontrol);
176         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
177 
178         ucontrol->value.integer.value[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_kcontrol_chip(kcontrol);
194         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
195 
196         if (wl1273->mode == ucontrol->value.integer.value[0])
197                 return 0;
198 
199         /* Do not allow changes while stream is running */
200         if (codec->active)
201                 return -EPERM;
202 
203         if (ucontrol->value.integer.value[0] < 0 ||
204             ucontrol->value.integer.value[0] >=  ARRAY_SIZE(wl1273_audio_route))
205                 return -EINVAL;
206 
207         wl1273->mode = ucontrol->value.integer.value[0];
208 
209         return 1;
210 }
211 
212 static const struct soc_enum wl1273_enum =
213         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
214 
215 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
216                                    struct snd_ctl_elem_value *ucontrol)
217 {
218         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
219         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
220 
221         dev_dbg(codec->dev, "%s: enter.\n", __func__);
222 
223         ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
224 
225         return 0;
226 }
227 
228 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
229                                    struct snd_ctl_elem_value *ucontrol)
230 {
231         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
232         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
233         int val, r = 0;
234 
235         dev_dbg(codec->dev, "%s: enter.\n", __func__);
236 
237         val = ucontrol->value.integer.value[0];
238         if (wl1273->core->audio_mode == val)
239                 return 0;
240 
241         r = wl1273->core->set_audio(wl1273->core, val);
242         if (r < 0)
243                 return r;
244 
245         return 1;
246 }
247 
248 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
249 
250 static const struct soc_enum wl1273_audio_enum =
251         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
252                             wl1273_audio_strings);
253 
254 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
255                                     struct snd_ctl_elem_value *ucontrol)
256 {
257         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
258         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
259 
260         dev_dbg(codec->dev, "%s: enter.\n", __func__);
261 
262         ucontrol->value.integer.value[0] = wl1273->core->volume;
263 
264         return 0;
265 }
266 
267 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
268                                     struct snd_ctl_elem_value *ucontrol)
269 {
270         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
271         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
272         int r;
273 
274         dev_dbg(codec->dev, "%s: enter.\n", __func__);
275 
276         r = wl1273->core->set_volume(wl1273->core,
277                                      ucontrol->value.integer.value[0]);
278         if (r)
279                 return r;
280 
281         return 1;
282 }
283 
284 static const struct snd_kcontrol_new wl1273_controls[] = {
285         SOC_ENUM_EXT("Codec Mode", wl1273_enum,
286                      snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
287         SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
288                      snd_wl1273_fm_audio_get,  snd_wl1273_fm_audio_put),
289         SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
290                        snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
291 };
292 
293 static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
294         SND_SOC_DAPM_INPUT("RX"),
295 
296         SND_SOC_DAPM_OUTPUT("TX"),
297 };
298 
299 static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
300         { "Capture", NULL, "RX" },
301 
302         { "TX", NULL, "Playback" },
303 };
304 
305 static int wl1273_startup(struct snd_pcm_substream *substream,
306                           struct snd_soc_dai *dai)
307 {
308         struct snd_soc_codec *codec = dai->codec;
309         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
310 
311         switch (wl1273->mode) {
312         case WL1273_MODE_BT:
313                 snd_pcm_hw_constraint_minmax(substream->runtime,
314                                              SNDRV_PCM_HW_PARAM_RATE,
315                                              8000, 8000);
316                 snd_pcm_hw_constraint_minmax(substream->runtime,
317                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
318                 break;
319         case WL1273_MODE_FM_RX:
320                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
321                         pr_err("Cannot play in RX mode.\n");
322                         return -EINVAL;
323                 }
324                 break;
325         case WL1273_MODE_FM_TX:
326                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
327                         pr_err("Cannot capture in TX mode.\n");
328                         return -EINVAL;
329                 }
330                 break;
331         default:
332                 return -EINVAL;
333                 break;
334         }
335 
336         return 0;
337 }
338 
339 static int wl1273_hw_params(struct snd_pcm_substream *substream,
340                             struct snd_pcm_hw_params *params,
341                             struct snd_soc_dai *dai)
342 {
343         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
344         struct wl1273_core *core = wl1273->core;
345         unsigned int rate, width, r;
346 
347         if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
348                 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
349                 return -EINVAL;
350         }
351 
352         rate = params_rate(params);
353         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
354 
355         if (wl1273->mode == WL1273_MODE_BT) {
356                 if (rate != 8000) {
357                         pr_err("Rate %d not supported.\n", params_rate(params));
358                         return -EINVAL;
359                 }
360 
361                 if (params_channels(params) != 1) {
362                         pr_err("Only mono supported.\n");
363                         return -EINVAL;
364                 }
365 
366                 return 0;
367         }
368 
369         if (wl1273->mode == WL1273_MODE_FM_TX &&
370             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
371                 pr_err("Only playback supported with TX.\n");
372                 return -EINVAL;
373         }
374 
375         if (wl1273->mode == WL1273_MODE_FM_RX  &&
376             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
377                 pr_err("Only capture supported with RX.\n");
378                 return -EINVAL;
379         }
380 
381         if (wl1273->mode != WL1273_MODE_FM_RX  &&
382             wl1273->mode != WL1273_MODE_FM_TX) {
383                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
384                 return -EINVAL;
385         }
386 
387         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
388         if (r)
389                 return r;
390 
391         wl1273->channels = params_channels(params);
392         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
393         if (r)
394                 return r;
395 
396         return 0;
397 }
398 
399 static const struct snd_soc_dai_ops wl1273_dai_ops = {
400         .startup        = wl1273_startup,
401         .hw_params      = wl1273_hw_params,
402 };
403 
404 static struct snd_soc_dai_driver wl1273_dai = {
405         .name = "wl1273-fm",
406         .playback = {
407                 .stream_name = "Playback",
408                 .channels_min = 1,
409                 .channels_max = 2,
410                 .rates = SNDRV_PCM_RATE_8000_48000,
411                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
412         .capture = {
413                 .stream_name = "Capture",
414                 .channels_min = 1,
415                 .channels_max = 2,
416                 .rates = SNDRV_PCM_RATE_8000_48000,
417                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
418         .ops = &wl1273_dai_ops,
419 };
420 
421 /* Audio interface format for the soc_card driver */
422 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
423 {
424         struct wl1273_priv *wl1273;
425 
426         if (codec == NULL || fmt == NULL)
427                 return -EINVAL;
428 
429         wl1273 = snd_soc_codec_get_drvdata(codec);
430 
431         switch (wl1273->mode) {
432         case WL1273_MODE_FM_RX:
433         case WL1273_MODE_FM_TX:
434                 *fmt =  SND_SOC_DAIFMT_I2S |
435                         SND_SOC_DAIFMT_NB_NF |
436                         SND_SOC_DAIFMT_CBM_CFM;
437 
438                 break;
439         case WL1273_MODE_BT:
440                 *fmt =  SND_SOC_DAIFMT_DSP_A |
441                         SND_SOC_DAIFMT_IB_NF |
442                         SND_SOC_DAIFMT_CBM_CFM;
443 
444                 break;
445         default:
446                 return -EINVAL;
447         }
448 
449         return 0;
450 }
451 EXPORT_SYMBOL_GPL(wl1273_get_format);
452 
453 static int wl1273_probe(struct snd_soc_codec *codec)
454 {
455         struct wl1273_core **core = codec->dev->platform_data;
456         struct wl1273_priv *wl1273;
457         int r;
458 
459         dev_dbg(codec->dev, "%s.\n", __func__);
460 
461         if (!core) {
462                 dev_err(codec->dev, "Platform data is missing.\n");
463                 return -EINVAL;
464         }
465 
466         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
467         if (wl1273 == NULL) {
468                 dev_err(codec->dev, "Cannot allocate memory.\n");
469                 return -ENOMEM;
470         }
471 
472         wl1273->mode = WL1273_MODE_BT;
473         wl1273->core = *core;
474 
475         snd_soc_codec_set_drvdata(codec, wl1273);
476 
477         r = snd_soc_add_codec_controls(codec, wl1273_controls,
478                                  ARRAY_SIZE(wl1273_controls));
479         if (r)
480                 kfree(wl1273);
481 
482         return r;
483 }
484 
485 static int wl1273_remove(struct snd_soc_codec *codec)
486 {
487         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
488 
489         dev_dbg(codec->dev, "%s\n", __func__);
490         kfree(wl1273);
491 
492         return 0;
493 }
494 
495 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
496         .probe = wl1273_probe,
497         .remove = wl1273_remove,
498 
499         .dapm_widgets = wl1273_dapm_widgets,
500         .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
501         .dapm_routes = wl1273_dapm_routes,
502         .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
503 };
504 
505 static int wl1273_platform_probe(struct platform_device *pdev)
506 {
507         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
508                                       &wl1273_dai, 1);
509 }
510 
511 static int wl1273_platform_remove(struct platform_device *pdev)
512 {
513         snd_soc_unregister_codec(&pdev->dev);
514         return 0;
515 }
516 
517 MODULE_ALIAS("platform:wl1273-codec");
518 
519 static struct platform_driver wl1273_platform_driver = {
520         .driver         = {
521                 .name   = "wl1273-codec",
522                 .owner  = THIS_MODULE,
523         },
524         .probe          = wl1273_platform_probe,
525         .remove         = wl1273_platform_remove,
526 };
527 
528 module_platform_driver(wl1273_platform_driver);
529 
530 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
531 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
532 MODULE_LICENSE("GPL");
533 

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