ASoC: Staticise AD1980 DAI
[pandora-kernel.git] / 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         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_fm_set_audio(wl1273->core, val);
242         if (r < 0)
243                 return r;
244
245         return 1;
246 }
247
248 static const char *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_fm_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 int wl1273_startup(struct snd_pcm_substream *substream,
294                           struct snd_soc_dai *dai)
295 {
296         struct snd_soc_pcm_runtime *rtd = substream->private_data;
297         struct snd_soc_codec *codec = rtd->codec;
298         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
299
300         switch (wl1273->mode) {
301         case WL1273_MODE_BT:
302                 snd_pcm_hw_constraint_minmax(substream->runtime,
303                                              SNDRV_PCM_HW_PARAM_RATE,
304                                              8000, 8000);
305                 snd_pcm_hw_constraint_minmax(substream->runtime,
306                                              SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
307                 break;
308         case WL1273_MODE_FM_RX:
309                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
310                         pr_err("Cannot play in RX mode.\n");
311                         return -EINVAL;
312                 }
313                 break;
314         case WL1273_MODE_FM_TX:
315                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
316                         pr_err("Cannot capture in TX mode.\n");
317                         return -EINVAL;
318                 }
319                 break;
320         default:
321                 return -EINVAL;
322                 break;
323         }
324
325         return 0;
326 }
327
328 static int wl1273_hw_params(struct snd_pcm_substream *substream,
329                             struct snd_pcm_hw_params *params,
330                             struct snd_soc_dai *dai)
331 {
332         struct snd_soc_pcm_runtime *rtd = substream->private_data;
333         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
334         struct wl1273_core *core = wl1273->core;
335         unsigned int rate, width, r;
336
337         if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
338                 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
339                 return -EINVAL;
340         }
341
342         rate = params_rate(params);
343         width =  hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
344
345         if (wl1273->mode == WL1273_MODE_BT) {
346                 if (rate != 8000) {
347                         pr_err("Rate %d not supported.\n", params_rate(params));
348                         return -EINVAL;
349                 }
350
351                 if (params_channels(params) != 1) {
352                         pr_err("Only mono supported.\n");
353                         return -EINVAL;
354                 }
355
356                 return 0;
357         }
358
359         if (wl1273->mode == WL1273_MODE_FM_TX &&
360             substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
361                 pr_err("Only playback supported with TX.\n");
362                 return -EINVAL;
363         }
364
365         if (wl1273->mode == WL1273_MODE_FM_RX  &&
366             substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
367                 pr_err("Only capture supported with RX.\n");
368                 return -EINVAL;
369         }
370
371         if (wl1273->mode != WL1273_MODE_FM_RX  &&
372             wl1273->mode != WL1273_MODE_FM_TX) {
373                 pr_err("Unexpected mode: %d.\n", wl1273->mode);
374                 return -EINVAL;
375         }
376
377         r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
378         if (r)
379                 return r;
380
381         wl1273->channels = params_channels(params);
382         r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
383         if (r)
384                 return r;
385
386         return 0;
387 }
388
389 static struct snd_soc_dai_ops wl1273_dai_ops = {
390         .startup        = wl1273_startup,
391         .hw_params      = wl1273_hw_params,
392 };
393
394 static struct snd_soc_dai_driver wl1273_dai = {
395         .name = "wl1273-fm",
396         .playback = {
397                 .stream_name = "Playback",
398                 .channels_min = 1,
399                 .channels_max = 2,
400                 .rates = SNDRV_PCM_RATE_8000_48000,
401                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
402         .capture = {
403                 .stream_name = "Capture",
404                 .channels_min = 1,
405                 .channels_max = 2,
406                 .rates = SNDRV_PCM_RATE_8000_48000,
407                 .formats = SNDRV_PCM_FMTBIT_S16_LE},
408         .ops = &wl1273_dai_ops,
409 };
410
411 /* Audio interface format for the soc_card driver */
412 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
413 {
414         struct wl1273_priv *wl1273;
415
416         if (codec == NULL || fmt == NULL)
417                 return -EINVAL;
418
419         wl1273 = snd_soc_codec_get_drvdata(codec);
420
421         switch (wl1273->mode) {
422         case WL1273_MODE_FM_RX:
423         case WL1273_MODE_FM_TX:
424                 *fmt =  SND_SOC_DAIFMT_I2S |
425                         SND_SOC_DAIFMT_NB_NF |
426                         SND_SOC_DAIFMT_CBM_CFM;
427
428                 break;
429         case WL1273_MODE_BT:
430                 *fmt =  SND_SOC_DAIFMT_DSP_A |
431                         SND_SOC_DAIFMT_IB_NF |
432                         SND_SOC_DAIFMT_CBM_CFM;
433
434                 break;
435         default:
436                 return -EINVAL;
437         }
438
439         return 0;
440 }
441 EXPORT_SYMBOL_GPL(wl1273_get_format);
442
443 static int wl1273_probe(struct snd_soc_codec *codec)
444 {
445         struct wl1273_core **core = codec->dev->platform_data;
446         struct wl1273_priv *wl1273;
447         int r;
448
449         dev_dbg(codec->dev, "%s.\n", __func__);
450
451         if (!core) {
452                 dev_err(codec->dev, "Platform data is missing.\n");
453                 return -EINVAL;
454         }
455
456         wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
457         if (wl1273 == NULL) {
458                 dev_err(codec->dev, "Cannot allocate memory.\n");
459                 return -ENOMEM;
460         }
461
462         wl1273->mode = WL1273_MODE_BT;
463         wl1273->core = *core;
464
465         snd_soc_codec_set_drvdata(codec, wl1273);
466         mutex_init(&codec->mutex);
467
468         r = snd_soc_add_controls(codec, wl1273_controls,
469                                  ARRAY_SIZE(wl1273_controls));
470         if (r)
471                 kfree(wl1273);
472
473         return r;
474 }
475
476 static int wl1273_remove(struct snd_soc_codec *codec)
477 {
478         struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
479
480         dev_dbg(codec->dev, "%s\n", __func__);
481         kfree(wl1273);
482
483         return 0;
484 }
485
486 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
487         .probe = wl1273_probe,
488         .remove = wl1273_remove,
489 };
490
491 static int __devinit wl1273_platform_probe(struct platform_device *pdev)
492 {
493         return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
494                                       &wl1273_dai, 1);
495 }
496
497 static int __devexit wl1273_platform_remove(struct platform_device *pdev)
498 {
499         snd_soc_unregister_codec(&pdev->dev);
500         return 0;
501 }
502
503 MODULE_ALIAS("platform:wl1273-codec");
504
505 static struct platform_driver wl1273_platform_driver = {
506         .driver         = {
507                 .name   = "wl1273-codec",
508                 .owner  = THIS_MODULE,
509         },
510         .probe          = wl1273_platform_probe,
511         .remove         = __devexit_p(wl1273_platform_remove),
512 };
513
514 static int __init wl1273_init(void)
515 {
516         return platform_driver_register(&wl1273_platform_driver);
517 }
518 module_init(wl1273_init);
519
520 static void __exit wl1273_exit(void)
521 {
522         platform_driver_unregister(&wl1273_platform_driver);
523 }
524 module_exit(wl1273_exit);
525
526 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
527 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
528 MODULE_LICENSE("GPL");