This is an ALSA codec for the Texas Instruments WL1273 FM Radio.

Signed-off-by: Matti J. Aaltonen matti.j.aaltonen@nokia.com --- sound/soc/codecs/wl1273.c | 598 +++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/wl1273.h | 43 ++++ 2 files changed, 641 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..c9a9269 --- /dev/null +++ b/sound/soc/codecs/wl1273.c @@ -0,0 +1,598 @@ +/* + * ALSA SoC WL1273 codec driver + * + * Author: Matti Aaltonen, matti.j.aaltonen@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_soc_codec *codec = socdev->card->codec; + struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); + + switch (wl1273->mode) { + case WL1273_MODE_BT: + snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_RATE, + 8000, 8000); + snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1); + break; + case WL1273_MODE_FM_RX: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + pr_err("Cannot play in RX mode.\n"); + return -EINVAL; + } + break; + case WL1273_MODE_FM_TX: + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + pr_err("Cannot capture in TX mode.\n"); + return -EINVAL; + } + 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; + + wl1273->channels = params_channels(params); + r = snd_wl1273_fm_set_channel_number(core, wl1273->channels); + if (r) + return r; + + return 0; +} + +static struct snd_soc_dai_ops wl1273_dai_ops = { + .startup = wl1273_startup, + .hw_params = wl1273_hw_params, +}; + +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_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE}, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE}, + .ops = &wl1273_dai_ops, +}; +EXPORT_SYMBOL_GPL(wl1273_dai); + +/* Audio interface format for the soc_card driver */ +int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt) +{ + struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); + + switch (wl1273->channels) { + /* Stereo */ + case 2: + *fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM; + + break; + /* Mono */ + case 1: + *fmt = SND_SOC_DAIFMT_DSP_A | + SND_SOC_DAIFMT_IB_NF | + SND_SOC_DAIFMT_CBM_CFM; + + break; + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(wl1273_get_format); + +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@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..087e587 --- /dev/null +++ b/sound/soc/codecs/wl1273.h @@ -0,0 +1,43 @@ +/* + * sound/soc/codec/wl1273.h + * + * ALSA SoC WL1273 codec driver + * + * Copyright (C) Nokia Corporation + * Author: Matti Aaltonen matti.j.aaltonen@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; + unsigned int channels; +}; + +extern struct snd_soc_dai wl1273_dai; +extern struct snd_soc_codec_device soc_codec_dev_wl1273; + +int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt); + +#endif /* End of __WL1273_CODEC_H__ */