mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 08:28:13 +00:00
23c7159a79
on some board use enable pin to control dmic start and stop, so add this feature in dmic driver. Signed-off-by: Lin Huang <hl@rock-chips.com> Signed-off-by: Mark Brown <broonie@kernel.org>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
|
|
* dmic.c -- SoC audio for Generic Digital MICs
|
|
*
|
|
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
|
|
*
|
|
* 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/gpio.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/soc-dapm.h>
|
|
|
|
static int dmic_daiops_trigger(struct snd_pcm_substream *substream,
|
|
int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
struct gpio_desc *dmic_en = snd_soc_dai_get_drvdata(dai);
|
|
|
|
if (!dmic_en)
|
|
return 0;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
gpiod_set_value(dmic_en, 1);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
gpiod_set_value(dmic_en, 0);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops dmic_dai_ops = {
|
|
.trigger = dmic_daiops_trigger,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver dmic_dai = {
|
|
.name = "dmic-hifi",
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 8,
|
|
.rates = SNDRV_PCM_RATE_CONTINUOUS,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE
|
|
| SNDRV_PCM_FMTBIT_S24_LE
|
|
| SNDRV_PCM_FMTBIT_S16_LE,
|
|
},
|
|
.ops = &dmic_dai_ops,
|
|
};
|
|
|
|
static int dmic_codec_probe(struct snd_soc_codec *codec)
|
|
{
|
|
struct gpio_desc *dmic_en;
|
|
|
|
dmic_en = devm_gpiod_get_optional(codec->dev,
|
|
"dmicen", GPIOD_OUT_LOW);
|
|
if (IS_ERR(dmic_en))
|
|
return PTR_ERR(dmic_en);
|
|
|
|
snd_soc_codec_set_drvdata(codec, dmic_en);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
|
|
SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
|
|
SND_SOC_NOPM, 0, 0),
|
|
SND_SOC_DAPM_INPUT("DMic"),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route intercon[] = {
|
|
{"DMIC AIF", NULL, "DMic"},
|
|
};
|
|
|
|
static const struct snd_soc_codec_driver soc_dmic = {
|
|
.probe = dmic_codec_probe,
|
|
.component_driver = {
|
|
.dapm_widgets = dmic_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),
|
|
.dapm_routes = intercon,
|
|
.num_dapm_routes = ARRAY_SIZE(intercon),
|
|
},
|
|
};
|
|
|
|
static int dmic_dev_probe(struct platform_device *pdev)
|
|
{
|
|
return snd_soc_register_codec(&pdev->dev,
|
|
&soc_dmic, &dmic_dai, 1);
|
|
}
|
|
|
|
static int dmic_dev_remove(struct platform_device *pdev)
|
|
{
|
|
snd_soc_unregister_codec(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
MODULE_ALIAS("platform:dmic-codec");
|
|
|
|
static const struct of_device_id dmic_dev_match[] = {
|
|
{.compatible = "dmic-codec"},
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver dmic_driver = {
|
|
.driver = {
|
|
.name = "dmic-codec",
|
|
.of_match_table = dmic_dev_match,
|
|
},
|
|
.probe = dmic_dev_probe,
|
|
.remove = dmic_dev_remove,
|
|
};
|
|
|
|
module_platform_driver(dmic_driver);
|
|
|
|
MODULE_DESCRIPTION("Generic DMIC driver");
|
|
MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
|
|
MODULE_LICENSE("GPL");
|