ASoC: ics43432: Add codec driver for InvenSense ICS-43432
Add support for the InvenSense ICS-43432 I2S MEMS microphone. This is a non-software-configurable MEMS microphone with I2S output. Tested on a setup with a single ICS-43432 (the device itself supports stereo operation using a hardware pin controlling left vs. right channel output). Signed-off-by: Ricard Wanderlof <ricardw@axis.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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Invensense ICS-43432 MEMS microphone with I2S output.
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There are no software configuration options for this device, indeed, the only
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host connection is the I2S interface. Apart from requirements on clock
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frequency (460 kHz to 3.379 MHz according to the data sheet) there must be
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64 clock cycles in each stereo output frame; 24 of the 32 available bits
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contain audio data. A hardware pin determines if the device outputs data
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on the left or right channel of the I2S frame.
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Required properties:
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- compatible : Must be "invensense,ics43432"
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Example:
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ics43432: ics43432 {
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compatible = "invensense,ics43432";
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};
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@ -110,6 +110,7 @@ ingenic Ingenic Semiconductor
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innolux Innolux Corporation
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intel Intel Corporation
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intercontrol Inter Control Group
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invensense InvenSense Inc.
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isee ISEE 2007 S.L.
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isil Intersil
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karo Ka-Ro electronics GmbH
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@ -62,6 +62,7 @@ config SND_SOC_ALL_CODECS
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select SND_SOC_BT_SCO
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select SND_SOC_ES8328_SPI if SPI_MASTER
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select SND_SOC_ES8328_I2C if I2C
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select SND_SOC_ICS43432
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select SND_SOC_ISABELLE if I2C
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select SND_SOC_JZ4740_CODEC
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select SND_SOC_LM4857 if I2C
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@ -446,6 +447,9 @@ config SND_SOC_ES8328_SPI
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tristate
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select SND_SOC_ES8328
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config SND_SOC_ICS43432
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tristate
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config SND_SOC_ISABELLE
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tristate
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@ -55,6 +55,7 @@ snd-soc-dmic-objs := dmic.o
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snd-soc-es8328-objs := es8328.o
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snd-soc-es8328-i2c-objs := es8328-i2c.o
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snd-soc-es8328-spi-objs := es8328-spi.o
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snd-soc-ics43432-objs := ics43432.o
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snd-soc-isabelle-objs := isabelle.o
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snd-soc-jz4740-codec-objs := jz4740.o
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snd-soc-l3-objs := l3.o
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@ -242,6 +243,7 @@ obj-$(CONFIG_SND_SOC_DMIC) += snd-soc-dmic.o
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obj-$(CONFIG_SND_SOC_ES8328) += snd-soc-es8328.o
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obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o
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obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o
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obj-$(CONFIG_SND_SOC_ICS43432) += snd-soc-ics43432.o
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obj-$(CONFIG_SND_SOC_ISABELLE) += snd-soc-isabelle.o
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obj-$(CONFIG_SND_SOC_JZ4740_CODEC) += snd-soc-jz4740-codec.o
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obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o
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/*
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* I2S MEMS microphone driver for InvenSense ICS-43432
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*
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* - Non configurable.
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* - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
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*
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* Copyright (c) 2015 Axis Communications AB
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*
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* Licensed under GPL2.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
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#define ICS43432_RATE_MAX 52800 /* Hz, from data sheet */
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#define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
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static struct snd_soc_dai_driver ics43432_dai = {
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.name = "ics43432-hifi",
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rate_min = ICS43432_RATE_MIN,
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.rate_max = ICS43432_RATE_MAX,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.formats = ICS43432_FORMATS,
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},
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};
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static struct snd_soc_codec_driver ics43432_codec_driver = {
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};
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static int ics43432_probe(struct platform_device *pdev)
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{
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return snd_soc_register_codec(&pdev->dev, &ics43432_codec_driver,
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&ics43432_dai, 1);
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}
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static int ics43432_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_codec(&pdev->dev);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id ics43432_ids[] = {
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{ .compatible = "invensense,ics43432", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, ics43432_dt_ids);
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#endif
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static struct platform_driver ics43432_driver = {
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.driver = {
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.name = "ics43432",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(ics43432_ids),
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},
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.probe = ics43432_probe,
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.remove = ics43432_remove,
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};
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module_platform_driver(ics43432_driver);
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MODULE_DESCRIPTION("ASoC ICS43432 driver");
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MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
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MODULE_LICENSE("GPLv2");
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