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kernel/sound/soc/codecs/wl1273.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* ALSA SoC WL1273 codec driver
*
* Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
*
* Copyright: (C) 2010, 2011 Nokia Corporation
*/
#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include "wl1273.h"
enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
/* codec private data */
struct wl1273_priv {
enum wl1273_mode mode;
struct wl1273_core *core;
unsigned int channels;
};
static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
int rate, int width)
{
struct device *dev = &core->client->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 = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
if (r)
goto out;
core->i2s_mode = mode;
r = core->write(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 device *dev = &core->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 = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
r = core->write(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_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
ucontrol->value.enumerated.item[0] = wl1273->mode;
return 0;
}
/*
* TODO: Implement the audio routing in the driver. Now this control
* only indicates the setting that has been done elsewhere (in the user
* space).
*/
static const char * const 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_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
if (wl1273->mode == ucontrol->value.enumerated.item[0])
return 0;
/* Do not allow changes while stream is running */
if (snd_soc_component_active(component))
return -EPERM;
if (ucontrol->value.enumerated.item[0] >= ARRAY_SIZE(wl1273_audio_route))
return -EINVAL;
wl1273->mode = ucontrol->value.enumerated.item[0];
return 1;
}
static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route);
static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
dev_dbg(component->dev, "%s: enter.\n", __func__);
ucontrol->value.enumerated.item[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_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
int val, r = 0;
dev_dbg(component->dev, "%s: enter.\n", __func__);
val = ucontrol->value.enumerated.item[0];
if (wl1273->core->audio_mode == val)
return 0;
r = wl1273->core->set_audio(wl1273->core, val);
if (r < 0)
return r;
return 1;
}
static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings);
static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
dev_dbg(component->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_component *component = snd_soc_kcontrol_component(kcontrol);
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
int r;
dev_dbg(component->dev, "%s: enter.\n", __func__);
r = wl1273->core->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 const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("RX"),
SND_SOC_DAPM_OUTPUT("TX"),
};
static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
{ "Capture", NULL, "RX" },
{ "TX", NULL, "Playback" },
};
static int wl1273_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
switch (wl1273->mode) {
case WL1273_MODE_BT:
snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_RATE, 8000);
snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_CHANNELS, 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;
}
return 0;
}
static int wl1273_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(dai->component);
struct wl1273_core *core = wl1273->core;
unsigned int rate, width, r;
if (params_width(params) != 16) {
dev_err(dai->dev, "%d bits/sample not supported\n",
params_width(params));
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 const struct snd_soc_dai_ops wl1273_dai_ops = {
.startup = wl1273_startup,
.hw_params = wl1273_hw_params,
};
static struct snd_soc_dai_driver wl1273_dai = {
.name = "wl1273-fm",
.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,
};
/* Audio interface format for the soc_card driver */
int wl1273_get_format(struct snd_soc_component *component, unsigned int *fmt)
{
struct wl1273_priv *wl1273;
if (component == NULL || fmt == NULL)
return -EINVAL;
wl1273 = snd_soc_component_get_drvdata(component);
switch (wl1273->mode) {
case WL1273_MODE_FM_RX:
case WL1273_MODE_FM_TX:
*fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBP_CFP;
break;
case WL1273_MODE_BT:
*fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_IB_NF |
SND_SOC_DAIFMT_CBP_CFP;
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(wl1273_get_format);
static int wl1273_probe(struct snd_soc_component *component)
{
struct wl1273_core **core = component->dev->platform_data;
struct wl1273_priv *wl1273;
dev_dbg(component->dev, "%s.\n", __func__);
if (!core) {
dev_err(component->dev, "Platform data is missing.\n");
return -EINVAL;
}
wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
if (!wl1273)
return -ENOMEM;
wl1273->mode = WL1273_MODE_BT;
wl1273->core = *core;
snd_soc_component_set_drvdata(component, wl1273);
return 0;
}
static void wl1273_remove(struct snd_soc_component *component)
{
struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component);
dev_dbg(component->dev, "%s\n", __func__);
kfree(wl1273);
}
static const struct snd_soc_component_driver soc_component_dev_wl1273 = {
.probe = wl1273_probe,
.remove = wl1273_remove,
.controls = wl1273_controls,
.num_controls = ARRAY_SIZE(wl1273_controls),
.dapm_widgets = wl1273_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
.dapm_routes = wl1273_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static int wl1273_platform_probe(struct platform_device *pdev)
{
return devm_snd_soc_register_component(&pdev->dev,
&soc_component_dev_wl1273,
&wl1273_dai, 1);
}
MODULE_ALIAS("platform:wl1273-codec");
static struct platform_driver wl1273_platform_driver = {
.driver = {
.name = "wl1273-codec",
},
.probe = wl1273_platform_probe,
};
module_platform_driver(wl1273_platform_driver);
MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION("ASoC WL1273 codec driver");
MODULE_LICENSE("GPL");
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