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Matti J. Aaltonen3fabe082010-08-20 12:32:46 +03001/*
2 * ALSA SoC WL1273 codec driver
3 *
4 * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
5 *
Matti Aaltonen40285f82011-03-01 10:10:37 -03006 * Copyright: (C) 2010, 2011 Nokia Corporation
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +03007 *
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>
Paul Gortmakerda155d52011-07-15 12:38:28 -040026#include <linux/module.h>
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +030027#include <sound/pcm.h>
28#include <sound/pcm_params.h>
Jarkko Nikula0d911bae2010-11-21 19:48:46 +020029#include <sound/soc.h>
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +030030#include <sound/initval.h>
31
32#include "wl1273.h"
33
34enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
35
36/* codec private data */
37struct wl1273_priv {
38 enum wl1273_mode mode;
39 struct wl1273_core *core;
40 unsigned int channels;
41};
42
43static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
44 int rate, int width)
45{
Matti J. Aaltonen228dd542011-01-13 15:22:45 +020046 struct device *dev = &core->client->dev;
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +030047 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) {
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200127 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300128 if (r)
129 goto out;
130
131 core->i2s_mode = mode;
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200132 r = core->write(core, WL1273_AUDIO_ENABLE,
133 WL1273_AUDIO_ENABLE_I2S);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300134 if (r)
135 goto out;
136 }
137out:
138 mutex_unlock(&core->lock);
139
140 return r;
141}
142
143static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
144 int channel_number)
145{
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200146 struct device *dev = &core->client->dev;
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300147 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)
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200157 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300158 else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200159 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300160 else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200161 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300162 else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200163 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300164 else
165 r = -EINVAL;
166out:
167 mutex_unlock(&core->lock);
168
169 return r;
170}
171
172static 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
Matti Aaltonen40285f82011-03-01 10:10:37 -0300183/*
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 */
188static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300189
190static 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
Matti J. Aaltonen2c4ee9b2010-09-10 10:41:30 +0300196 if (wl1273->mode == ucontrol->value.integer.value[0])
197 return 0;
198
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300199 /* 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
212static const struct soc_enum wl1273_enum =
213 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
214
215static 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
228static 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
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200241 r = wl1273->core->set_audio(wl1273->core, val);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300242 if (r < 0)
243 return r;
244
245 return 1;
246}
247
Matti Aaltonen40285f82011-03-01 10:10:37 -0300248static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300249
250static const struct soc_enum wl1273_audio_enum =
251 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
252 wl1273_audio_strings);
253
254static 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
267static 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
Matti J. Aaltonen228dd542011-01-13 15:22:45 +0200276 r = wl1273->core->set_volume(wl1273->core,
277 ucontrol->value.integer.value[0]);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300278 if (r)
279 return r;
280
281 return 1;
282}
283
284static 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
293static int wl1273_startup(struct snd_pcm_substream *substream,
294 struct snd_soc_dai *dai)
295{
Mark Browne6968a12012-04-04 15:58:16 +0100296 struct snd_soc_codec *codec = dai->codec;
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300297 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
327static int wl1273_hw_params(struct snd_pcm_substream *substream,
328 struct snd_pcm_hw_params *params,
329 struct snd_soc_dai *dai)
330{
Mark Browne6968a12012-04-04 15:58:16 +0100331 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300332 struct wl1273_core *core = wl1273->core;
333 unsigned int rate, width, r;
334
335 if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
336 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
337 return -EINVAL;
338 }
339
340 rate = params_rate(params);
341 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
342
343 if (wl1273->mode == WL1273_MODE_BT) {
344 if (rate != 8000) {
345 pr_err("Rate %d not supported.\n", params_rate(params));
346 return -EINVAL;
347 }
348
349 if (params_channels(params) != 1) {
350 pr_err("Only mono supported.\n");
351 return -EINVAL;
352 }
353
354 return 0;
355 }
356
357 if (wl1273->mode == WL1273_MODE_FM_TX &&
358 substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
359 pr_err("Only playback supported with TX.\n");
360 return -EINVAL;
361 }
362
363 if (wl1273->mode == WL1273_MODE_FM_RX &&
364 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
365 pr_err("Only capture supported with RX.\n");
366 return -EINVAL;
367 }
368
369 if (wl1273->mode != WL1273_MODE_FM_RX &&
370 wl1273->mode != WL1273_MODE_FM_TX) {
371 pr_err("Unexpected mode: %d.\n", wl1273->mode);
372 return -EINVAL;
373 }
374
375 r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
376 if (r)
377 return r;
378
379 wl1273->channels = params_channels(params);
380 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
381 if (r)
382 return r;
383
384 return 0;
385}
386
Lars-Peter Clausen85e76522011-11-23 11:40:40 +0100387static const struct snd_soc_dai_ops wl1273_dai_ops = {
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300388 .startup = wl1273_startup,
389 .hw_params = wl1273_hw_params,
390};
391
392static struct snd_soc_dai_driver wl1273_dai = {
393 .name = "wl1273-fm",
394 .playback = {
395 .stream_name = "Playback",
396 .channels_min = 1,
397 .channels_max = 2,
398 .rates = SNDRV_PCM_RATE_8000_48000,
399 .formats = SNDRV_PCM_FMTBIT_S16_LE},
400 .capture = {
401 .stream_name = "Capture",
402 .channels_min = 1,
403 .channels_max = 2,
404 .rates = SNDRV_PCM_RATE_8000_48000,
405 .formats = SNDRV_PCM_FMTBIT_S16_LE},
406 .ops = &wl1273_dai_ops,
407};
408
409/* Audio interface format for the soc_card driver */
410int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
411{
412 struct wl1273_priv *wl1273;
413
414 if (codec == NULL || fmt == NULL)
415 return -EINVAL;
416
417 wl1273 = snd_soc_codec_get_drvdata(codec);
418
419 switch (wl1273->mode) {
420 case WL1273_MODE_FM_RX:
421 case WL1273_MODE_FM_TX:
422 *fmt = SND_SOC_DAIFMT_I2S |
423 SND_SOC_DAIFMT_NB_NF |
424 SND_SOC_DAIFMT_CBM_CFM;
425
426 break;
427 case WL1273_MODE_BT:
428 *fmt = SND_SOC_DAIFMT_DSP_A |
429 SND_SOC_DAIFMT_IB_NF |
430 SND_SOC_DAIFMT_CBM_CFM;
431
432 break;
433 default:
434 return -EINVAL;
435 }
436
437 return 0;
438}
439EXPORT_SYMBOL_GPL(wl1273_get_format);
440
441static int wl1273_probe(struct snd_soc_codec *codec)
442{
Samuel Ortiz9e554692011-04-06 11:56:04 +0200443 struct wl1273_core **core = codec->dev->platform_data;
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300444 struct wl1273_priv *wl1273;
445 int r;
446
447 dev_dbg(codec->dev, "%s.\n", __func__);
448
449 if (!core) {
450 dev_err(codec->dev, "Platform data is missing.\n");
451 return -EINVAL;
452 }
453
454 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
455 if (wl1273 == NULL) {
456 dev_err(codec->dev, "Cannot allocate memory.\n");
457 return -ENOMEM;
458 }
459
460 wl1273->mode = WL1273_MODE_BT;
461 wl1273->core = *core;
462
463 snd_soc_codec_set_drvdata(codec, wl1273);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300464
Liam Girdwood022658b2012-02-03 17:43:09 +0000465 r = snd_soc_add_codec_controls(codec, wl1273_controls,
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300466 ARRAY_SIZE(wl1273_controls));
467 if (r)
468 kfree(wl1273);
469
470 return r;
471}
472
473static 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
483static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
484 .probe = wl1273_probe,
485 .remove = wl1273_remove,
486};
487
488static 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
494static int __devexit wl1273_platform_remove(struct platform_device *pdev)
495{
496 snd_soc_unregister_codec(&pdev->dev);
497 return 0;
498}
499
500MODULE_ALIAS("platform:wl1273-codec");
501
502static 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
Mark Brown5bbcc3c2011-11-23 22:52:08 +0000511module_platform_driver(wl1273_platform_driver);
Matti J. Aaltonen3fabe082010-08-20 12:32:46 +0300512
513MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
514MODULE_DESCRIPTION("ASoC WL1273 codec driver");
515MODULE_LICENSE("GPL");