[alsa-devel] [PATCH v2 1/1] ASoC: TI WL1273 FM Radio Codec.
Matti J. Aaltonen
matti.j.aaltonen at nokia.com
Thu Jul 22 11:38:54 CEST 2010
This is an ALSA codec for the Texas Instruments WL1273 FM Radio.
Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen at nokia.com>
---
sound/soc/codecs/wl1273.c | 586 +++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/wl1273.h | 42 ++++
2 files changed, 628 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/codecs/wl1273.c
create mode 100644 sound/soc/codecs/wl1273.h
diff --git a/sound/soc/codecs/wl1273.c b/sound/soc/codecs/wl1273.c
new file mode 100644
index 0000000..ca3e654
--- /dev/null
+++ b/sound/soc/codecs/wl1273.c
@@ -0,0 +1,586 @@
+/*
+ * ALSA SoC WL1273 codec driver
+ *
+ * Author: Matti Aaltonen, <matti.j.aaltonen at nokia.com>
+ *
+ * Copyright: (C) 2010 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/mfd/wl1273-core.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+
+#include "wl1273.h"
+
+static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
+ int rate, int width)
+{
+ struct device *dev = &core->i2c_dev->dev;
+ int r = 0;
+ u16 mode;
+
+ dev_dbg(dev, "rate: %d\n", rate);
+ dev_dbg(dev, "width: %d\n", width);
+
+ mutex_lock(&core->lock);
+
+ mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
+
+ switch (rate) {
+ case 48000:
+ mode |= WL1273_IS2_RATE_48K;
+ break;
+ case 44100:
+ mode |= WL1273_IS2_RATE_44_1K;
+ break;
+ case 32000:
+ mode |= WL1273_IS2_RATE_32K;
+ break;
+ case 22050:
+ mode |= WL1273_IS2_RATE_22_05K;
+ break;
+ case 16000:
+ mode |= WL1273_IS2_RATE_16K;
+ break;
+ case 12000:
+ mode |= WL1273_IS2_RATE_12K;
+ break;
+ case 11025:
+ mode |= WL1273_IS2_RATE_11_025;
+ break;
+ case 8000:
+ mode |= WL1273_IS2_RATE_8K;
+ break;
+ default:
+ dev_err(dev, "Sampling rate: %d not supported\n", rate);
+ r = -EINVAL;
+ goto out;
+ }
+
+ switch (width) {
+ case 16:
+ mode |= WL1273_IS2_WIDTH_32;
+ break;
+ case 20:
+ mode |= WL1273_IS2_WIDTH_40;
+ break;
+ case 24:
+ mode |= WL1273_IS2_WIDTH_48;
+ break;
+ case 25:
+ mode |= WL1273_IS2_WIDTH_50;
+ break;
+ case 30:
+ mode |= WL1273_IS2_WIDTH_60;
+ break;
+ case 32:
+ mode |= WL1273_IS2_WIDTH_64;
+ break;
+ case 40:
+ mode |= WL1273_IS2_WIDTH_80;
+ break;
+ case 48:
+ mode |= WL1273_IS2_WIDTH_96;
+ break;
+ case 64:
+ mode |= WL1273_IS2_WIDTH_128;
+ break;
+ default:
+ dev_err(dev, "Data width: %d not supported\n", width);
+ r = -EINVAL;
+ goto out;
+ }
+
+ dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
+ dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
+ dev_dbg(dev, "mode: 0x%04x\n", mode);
+
+ if (core->i2s_mode != mode) {
+ r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
+ mode);
+ if (!r)
+ core->i2s_mode = mode;
+
+ r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
+ WL1273_AUDIO_ENABLE_I2S);
+ if (r)
+ goto out;
+ }
+out:
+ mutex_unlock(&core->lock);
+
+ return r;
+}
+
+static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
+ int channel_number)
+{
+ struct i2c_client *client = core->i2c_dev;
+ struct device *dev = &client->dev;
+ int r = 0;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ mutex_lock(&core->lock);
+
+ if (core->channel_number == channel_number)
+ goto out;
+
+ if (channel_number == 1 && core->mode == WL1273_MODE_RX)
+ r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
+ WL1273_RX_MONO);
+ else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
+ r = wl1273_fm_write_cmd(core, WL1273_MONO_SET,
+ WL1273_TX_MONO);
+ else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
+ r = wl1273_fm_write_cmd(core, WL1273_MOST_MODE_SET,
+ WL1273_RX_STEREO);
+ else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
+ r = wl1273_fm_write_cmd(core, WL1273_MONO_SET,
+ WL1273_TX_STEREO);
+ else
+ r = -EINVAL;
+out:
+ mutex_unlock(&core->lock);
+
+ return r;
+}
+
+static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = wl1273->mode;
+
+ return 0;
+}
+
+static const char *wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
+
+static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ /* Do not allow changes while stream is running */
+ if (codec->active)
+ return -EPERM;
+
+ if (ucontrol->value.integer.value[0] < 0 ||
+ ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route))
+ return -EINVAL;
+
+ wl1273->mode = ucontrol->value.integer.value[0];
+
+ return 1;
+}
+
+static const struct soc_enum wl1273_enum =
+ SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
+
+static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
+
+ return 0;
+}
+
+static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ int val, r = 0;
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ val = ucontrol->value.integer.value[0];
+ if (wl1273->core->audio_mode == val)
+ return 0;
+
+ r = wl1273_fm_set_audio(wl1273->core, val);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static const char *wl1273_audio_strings[] = { "Digital", "Analog" };
+
+static const struct soc_enum wl1273_audio_enum =
+ SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
+ wl1273_audio_strings);
+
+static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ ucontrol->value.integer.value[0] = wl1273->core->volume;
+
+ return 0;
+}
+
+static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ int r;
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ r = wl1273_fm_set_volume(wl1273->core,
+ ucontrol->value.integer.value[0]);
+ if (r)
+ return r;
+
+ return 1;
+}
+
+static const struct snd_kcontrol_new wl1273_controls[] = {
+ SOC_ENUM_EXT("Codec Mode", wl1273_enum,
+ snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
+ SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
+ snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
+ SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
+ snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
+};
+
+static int wl1273_add_controls(struct snd_soc_codec *codec)
+{
+ return snd_soc_add_controls(codec, wl1273_controls,
+ ARRAY_SIZE(wl1273_controls));
+}
+
+static int wl1273_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_pcm *pcm = socdev->card->dai_link->pcm;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ switch (wl1273->mode) {
+ case WL1273_MODE_BT:
+ pcm->info_flags &= ~SNDRV_PCM_INFO_HALF_DUPLEX;
+ break;
+ case WL1273_MODE_FM_RX:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ pr_err("Cannot play in RX mode.\n");
+ return -EINVAL;
+ }
+ pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
+ break;
+ case WL1273_MODE_FM_TX:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ pr_err("Cannot capture in TX mode.\n");
+ return -EINVAL;
+ }
+ pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+
+ return 0;
+}
+
+static int wl1273_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ struct wl1273_core *core = wl1273->core;
+ unsigned int rate, width, r;
+
+ if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
+ pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
+ return -EINVAL;
+ }
+
+ rate = params_rate(params);
+ width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
+
+ if (wl1273->mode == WL1273_MODE_BT) {
+ if (rate != 8000) {
+ pr_err("Rate %d not supported.\n", params_rate(params));
+ return -EINVAL;
+ }
+
+ if (params_channels(params) != 1) {
+ pr_err("Only mono supported.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+ }
+
+ if (wl1273->mode == WL1273_MODE_FM_TX &&
+ substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ pr_err("Only playback supported with TX.\n");
+ return -EINVAL;
+ }
+
+ if (wl1273->mode == WL1273_MODE_FM_RX &&
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ pr_err("Only capture supported with RX.\n");
+ return -EINVAL;
+ }
+
+ if (wl1273->mode != WL1273_MODE_FM_RX &&
+ wl1273->mode != WL1273_MODE_FM_TX) {
+ pr_err("Unexpected mode: %d.\n", wl1273->mode);
+ return -EINVAL;
+ }
+
+ r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
+ if (r)
+ return r;
+
+ r = snd_wl1273_fm_set_channel_number(core, (params_channels(params)));
+ if (r)
+ return r;
+
+ return 0;
+}
+
+static int wl1273_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ return 0;
+}
+
+static struct snd_soc_dai_ops wl1273_dai_ops = {
+ .startup = wl1273_startup,
+ .hw_params = wl1273_hw_params,
+ .set_fmt = wl1273_set_dai_fmt,
+};
+
+struct snd_soc_dai wl1273_dai = {
+ .name = "WL1273 BT/FM codec",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE},
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE},
+ .ops = &wl1273_dai_ops,
+};
+EXPORT_SYMBOL_GPL(wl1273_dai);
+
+/*
+ * This function is exported because the soc_card driver needs to
+ * know the mode.
+ */
+enum wl1273_mode wl1273_get_codec_mode(struct snd_soc_codec *codec)
+{
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ return wl1273->mode;
+}
+EXPORT_SYMBOL_GPL(wl1273_get_codec_mode);
+
+static struct snd_soc_codec *wl1273_codec;
+
+/*
+ * initialize the driver
+ * register the mixer and dsp interfaces with the kernel
+ */
+static int wl1273_soc_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ struct wl1273_priv *wl1273;
+ int r = 0;
+
+ dev_dbg(&pdev->dev, "%s.\n", __func__);
+
+ codec = wl1273_codec;
+ wl1273 = snd_soc_codec_get_drvdata(codec);
+ socdev->card->codec = codec;
+
+ codec->name = "wl1273";
+ codec->owner = THIS_MODULE;
+ codec->dai = &wl1273_dai;
+ codec->num_dai = 1;
+
+ /* register pcms */
+ r = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (r < 0) {
+ dev_err(&pdev->dev, "Wl1273: failed to create pcms.\n");
+ goto err2;
+ }
+
+ r = wl1273_add_controls(codec);
+ if (r < 0) {
+ dev_err(&pdev->dev, "Wl1273: failed to add contols.\n");
+ goto err1;
+ }
+
+ return r;
+err1:
+ snd_soc_free_pcms(socdev);
+err2:
+ return r;
+}
+
+static int wl1273_soc_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+
+ snd_soc_free_pcms(socdev);
+
+ return 0;
+}
+
+static int __devinit wl1273_codec_probe(struct platform_device *pdev)
+{
+ struct wl1273_core **pdata = pdev->dev.platform_data;
+ struct snd_soc_codec *codec;
+ struct wl1273_priv *wl1273;
+ int r;
+
+ dev_dbg(&pdev->dev, "%s.\n", __func__);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "Platform data is missing.\n");
+ return -EINVAL;
+ }
+
+ wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
+ if (wl1273 == NULL) {
+ dev_err(&pdev->dev, "Cannot allocate memory.\n");
+ return -ENOMEM;
+ }
+
+ wl1273->mode = WL1273_MODE_BT;
+ wl1273->core = *pdata;
+
+ codec = &wl1273->codec;
+ snd_soc_codec_set_drvdata(codec, wl1273);
+ codec->dev = &pdev->dev;
+ wl1273_dai.dev = &pdev->dev;
+
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+
+ codec->name = "wl1273";
+ codec->owner = THIS_MODULE;
+ codec->dai = &wl1273_dai;
+ codec->num_dai = 1;
+
+ platform_set_drvdata(pdev, wl1273);
+ wl1273_codec = codec;
+
+ codec->bias_level = SND_SOC_BIAS_OFF;
+
+ r = snd_soc_register_codec(codec);
+ if (r != 0) {
+ dev_err(codec->dev, "Failed to register codec: %d\n", r);
+ goto err2;
+ }
+
+ r = snd_soc_register_dai(&wl1273_dai);
+ if (r != 0) {
+ dev_err(codec->dev, "Failed to register DAIs: %d\n", r);
+ goto err1;
+ }
+
+ return 0;
+
+err1:
+ snd_soc_unregister_codec(codec);
+err2:
+ kfree(wl1273);
+ return r;
+}
+
+static int __devexit wl1273_codec_remove(struct platform_device *pdev)
+{
+ struct wl1273_priv *wl1273 = platform_get_drvdata(pdev);
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ snd_soc_unregister_dai(&wl1273_dai);
+ snd_soc_unregister_codec(&wl1273->codec);
+
+ kfree(wl1273);
+ wl1273_codec = NULL;
+
+ return 0;
+}
+
+MODULE_ALIAS("platform:wl1273_codec_audio");
+
+static struct platform_driver wl1273_codec_driver = {
+ .probe = wl1273_codec_probe,
+ .remove = __devexit_p(wl1273_codec_remove),
+ .driver = {
+ .name = "wl1273_codec_audio",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init wl1273_modinit(void)
+{
+ return platform_driver_register(&wl1273_codec_driver);
+}
+module_init(wl1273_modinit);
+
+static void __exit wl1273_exit(void)
+{
+ platform_driver_unregister(&wl1273_codec_driver);
+}
+module_exit(wl1273_exit);
+
+struct snd_soc_codec_device soc_codec_dev_wl1273 = {
+ .probe = wl1273_soc_probe,
+ .remove = wl1273_soc_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wl1273);
+
+MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen at nokia.com>");
+MODULE_DESCRIPTION("ASoC WL1273 codec driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wl1273.h b/sound/soc/codecs/wl1273.h
new file mode 100644
index 0000000..8fb50ab
--- /dev/null
+++ b/sound/soc/codecs/wl1273.h
@@ -0,0 +1,42 @@
+/*
+ * sound/soc/codec/wl1273.h
+ *
+ * ALSA SoC WL1273 codec driver
+ *
+ * Copyright (C) Nokia Corporation
+ * Author: Matti Aaltonen <matti.j.aaltonen at nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#ifndef __WL1273_CODEC_H__
+#define __WL1273_CODEC_H__
+
+enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
+
+/* codec private data */
+struct wl1273_priv {
+ struct snd_soc_codec codec;
+ enum wl1273_mode mode;
+ struct wl1273_core *core;
+};
+
+extern struct snd_soc_dai wl1273_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wl1273;
+
+enum wl1273_mode wl1273_get_codec_mode(struct snd_soc_codec *codec);
+
+#endif /* End of __WL1273_CODEC_H__ */
--
1.6.1.3
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