2 * ALSA SoC WL1273 codec driver
4 * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
6 * Copyright: (C) 2010, 2011 Nokia Corporation
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.
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.
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
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.h>
29 #include <sound/initval.h>
33 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
35 /* codec private data */
37 enum wl1273_mode mode;
38 struct wl1273_core *core;
39 unsigned int channels;
42 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
45 struct device *dev = &core->client->dev;
49 dev_dbg(dev, "rate: %d\n", rate);
50 dev_dbg(dev, "width: %d\n", width);
52 mutex_lock(&core->lock);
54 mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
58 mode |= WL1273_IS2_RATE_48K;
61 mode |= WL1273_IS2_RATE_44_1K;
64 mode |= WL1273_IS2_RATE_32K;
67 mode |= WL1273_IS2_RATE_22_05K;
70 mode |= WL1273_IS2_RATE_16K;
73 mode |= WL1273_IS2_RATE_12K;
76 mode |= WL1273_IS2_RATE_11_025;
79 mode |= WL1273_IS2_RATE_8K;
82 dev_err(dev, "Sampling rate: %d not supported\n", rate);
89 mode |= WL1273_IS2_WIDTH_32;
92 mode |= WL1273_IS2_WIDTH_40;
95 mode |= WL1273_IS2_WIDTH_48;
98 mode |= WL1273_IS2_WIDTH_50;
101 mode |= WL1273_IS2_WIDTH_60;
104 mode |= WL1273_IS2_WIDTH_64;
107 mode |= WL1273_IS2_WIDTH_80;
110 mode |= WL1273_IS2_WIDTH_96;
113 mode |= WL1273_IS2_WIDTH_128;
116 dev_err(dev, "Data width: %d not supported\n", width);
121 dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
122 dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
123 dev_dbg(dev, "mode: 0x%04x\n", mode);
125 if (core->i2s_mode != mode) {
126 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
130 core->i2s_mode = mode;
131 r = core->write(core, WL1273_AUDIO_ENABLE,
132 WL1273_AUDIO_ENABLE_I2S);
137 mutex_unlock(&core->lock);
142 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
145 struct device *dev = &core->client->dev;
148 dev_dbg(dev, "%s\n", __func__);
150 mutex_lock(&core->lock);
152 if (core->channel_number == channel_number)
155 if (channel_number == 1 && core->mode == WL1273_MODE_RX)
156 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
157 else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
158 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
159 else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
160 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
161 else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
162 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
166 mutex_unlock(&core->lock);
171 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
174 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
175 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
177 ucontrol->value.integer.value[0] = wl1273->mode;
183 * TODO: Implement the audio routing in the driver. Now this control
184 * only indicates the setting that has been done elsewhere (in the user
187 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
189 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
190 struct snd_ctl_elem_value *ucontrol)
192 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
193 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
195 if (wl1273->mode == ucontrol->value.integer.value[0])
198 /* Do not allow changes while stream is running */
202 if (ucontrol->value.integer.value[0] < 0 ||
203 ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route))
206 wl1273->mode = ucontrol->value.integer.value[0];
211 static const struct soc_enum wl1273_enum =
212 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
214 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
215 struct snd_ctl_elem_value *ucontrol)
217 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
218 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
220 dev_dbg(codec->dev, "%s: enter.\n", __func__);
222 ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
227 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
228 struct snd_ctl_elem_value *ucontrol)
230 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
231 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
234 dev_dbg(codec->dev, "%s: enter.\n", __func__);
236 val = ucontrol->value.integer.value[0];
237 if (wl1273->core->audio_mode == val)
240 r = wl1273->core->set_audio(wl1273->core, val);
247 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
249 static const struct soc_enum wl1273_audio_enum =
250 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
251 wl1273_audio_strings);
253 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
254 struct snd_ctl_elem_value *ucontrol)
256 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
257 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
259 dev_dbg(codec->dev, "%s: enter.\n", __func__);
261 ucontrol->value.integer.value[0] = wl1273->core->volume;
266 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
267 struct snd_ctl_elem_value *ucontrol)
269 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
270 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
273 dev_dbg(codec->dev, "%s: enter.\n", __func__);
275 r = wl1273->core->set_volume(wl1273->core,
276 ucontrol->value.integer.value[0]);
283 static const struct snd_kcontrol_new wl1273_controls[] = {
284 SOC_ENUM_EXT("Codec Mode", wl1273_enum,
285 snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
286 SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
287 snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
288 SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
289 snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
292 static int wl1273_startup(struct snd_pcm_substream *substream,
293 struct snd_soc_dai *dai)
295 struct snd_soc_pcm_runtime *rtd = substream->private_data;
296 struct snd_soc_codec *codec = rtd->codec;
297 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
299 switch (wl1273->mode) {
301 snd_pcm_hw_constraint_minmax(substream->runtime,
302 SNDRV_PCM_HW_PARAM_RATE,
304 snd_pcm_hw_constraint_minmax(substream->runtime,
305 SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
307 case WL1273_MODE_FM_RX:
308 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
309 pr_err("Cannot play in RX mode.\n");
313 case WL1273_MODE_FM_TX:
314 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
315 pr_err("Cannot capture in TX mode.\n");
327 static int wl1273_hw_params(struct snd_pcm_substream *substream,
328 struct snd_pcm_hw_params *params,
329 struct snd_soc_dai *dai)
331 struct snd_soc_pcm_runtime *rtd = substream->private_data;
332 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec);
333 struct wl1273_core *core = wl1273->core;
334 unsigned int rate, width, r;
336 if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
337 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
341 rate = params_rate(params);
342 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
344 if (wl1273->mode == WL1273_MODE_BT) {
346 pr_err("Rate %d not supported.\n", params_rate(params));
350 if (params_channels(params) != 1) {
351 pr_err("Only mono supported.\n");
358 if (wl1273->mode == WL1273_MODE_FM_TX &&
359 substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
360 pr_err("Only playback supported with TX.\n");
364 if (wl1273->mode == WL1273_MODE_FM_RX &&
365 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
366 pr_err("Only capture supported with RX.\n");
370 if (wl1273->mode != WL1273_MODE_FM_RX &&
371 wl1273->mode != WL1273_MODE_FM_TX) {
372 pr_err("Unexpected mode: %d.\n", wl1273->mode);
376 r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
380 wl1273->channels = params_channels(params);
381 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
388 static struct snd_soc_dai_ops wl1273_dai_ops = {
389 .startup = wl1273_startup,
390 .hw_params = wl1273_hw_params,
393 static struct snd_soc_dai_driver wl1273_dai = {
396 .stream_name = "Playback",
399 .rates = SNDRV_PCM_RATE_8000_48000,
400 .formats = SNDRV_PCM_FMTBIT_S16_LE},
402 .stream_name = "Capture",
405 .rates = SNDRV_PCM_RATE_8000_48000,
406 .formats = SNDRV_PCM_FMTBIT_S16_LE},
407 .ops = &wl1273_dai_ops,
410 /* Audio interface format for the soc_card driver */
411 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
413 struct wl1273_priv *wl1273;
415 if (codec == NULL || fmt == NULL)
418 wl1273 = snd_soc_codec_get_drvdata(codec);
420 switch (wl1273->mode) {
421 case WL1273_MODE_FM_RX:
422 case WL1273_MODE_FM_TX:
423 *fmt = SND_SOC_DAIFMT_I2S |
424 SND_SOC_DAIFMT_NB_NF |
425 SND_SOC_DAIFMT_CBM_CFM;
429 *fmt = SND_SOC_DAIFMT_DSP_A |
430 SND_SOC_DAIFMT_IB_NF |
431 SND_SOC_DAIFMT_CBM_CFM;
440 EXPORT_SYMBOL_GPL(wl1273_get_format);
442 static int wl1273_probe(struct snd_soc_codec *codec)
444 struct wl1273_core **core = codec->dev->platform_data;
445 struct wl1273_priv *wl1273;
448 dev_dbg(codec->dev, "%s.\n", __func__);
451 dev_err(codec->dev, "Platform data is missing.\n");
455 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
456 if (wl1273 == NULL) {
457 dev_err(codec->dev, "Cannot allocate memory.\n");
461 wl1273->mode = WL1273_MODE_BT;
462 wl1273->core = *core;
464 snd_soc_codec_set_drvdata(codec, wl1273);
466 r = snd_soc_add_controls(codec, wl1273_controls,
467 ARRAY_SIZE(wl1273_controls));
474 static int wl1273_remove(struct snd_soc_codec *codec)
476 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
478 dev_dbg(codec->dev, "%s\n", __func__);
484 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
485 .probe = wl1273_probe,
486 .remove = wl1273_remove,
489 static int __devinit wl1273_platform_probe(struct platform_device *pdev)
491 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
495 static int __devexit wl1273_platform_remove(struct platform_device *pdev)
497 snd_soc_unregister_codec(&pdev->dev);
501 MODULE_ALIAS("platform:wl1273-codec");
503 static struct platform_driver wl1273_platform_driver = {
505 .name = "wl1273-codec",
506 .owner = THIS_MODULE,
508 .probe = wl1273_platform_probe,
509 .remove = __devexit_p(wl1273_platform_remove),
512 static int __init wl1273_init(void)
514 return platform_driver_register(&wl1273_platform_driver);
516 module_init(wl1273_init);
518 static void __exit wl1273_exit(void)
520 platform_driver_unregister(&wl1273_platform_driver);
522 module_exit(wl1273_exit);
524 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
525 MODULE_DESCRIPTION("ASoC WL1273 codec driver");
526 MODULE_LICENSE("GPL");