1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * I2S MEMS microphone driver for InvenSense ICS-43432 and similar
 4 * MEMS-based microphones.
 5 *
 6 * - Non configurable.
 7 * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
 8 *
 9 * Copyright (c) 2015 Axis Communications AB
 
 
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/slab.h>
15#include <sound/core.h>
16#include <sound/pcm.h>
17#include <sound/pcm_params.h>
18#include <sound/soc.h>
19#include <sound/initval.h>
20#include <sound/tlv.h>
21
22#define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
23#define ICS43432_RATE_MAX 52800  /* Hz, from data sheet */
24
25#define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
26
27static struct snd_soc_dai_driver ics43432_dai = {
28	.name = "ics43432-hifi",
29	.capture = {
30		.stream_name = "Capture",
31		.channels_min = 1,
32		.channels_max = 2,
33		.rate_min = ICS43432_RATE_MIN,
34		.rate_max = ICS43432_RATE_MAX,
35		.rates = SNDRV_PCM_RATE_CONTINUOUS,
36		.formats = ICS43432_FORMATS,
37	},
38};
39
40static const struct snd_soc_component_driver ics43432_component_driver = {
41	.idle_bias_on		= 1,
42	.use_pmdown_time	= 1,
43	.endianness		= 1,
44};
45
46static int ics43432_probe(struct platform_device *pdev)
47{
48	return devm_snd_soc_register_component(&pdev->dev,
49			&ics43432_component_driver,
50			&ics43432_dai, 1);
51}
52
 
 
 
 
 
 
53#ifdef CONFIG_OF
54static const struct of_device_id ics43432_ids[] = {
55	{ .compatible = "invensense,ics43432", },
56	{ .compatible = "cui,cmm-4030d-261", },
57	{ }
58};
59MODULE_DEVICE_TABLE(of, ics43432_ids);
60#endif
61
62static struct platform_driver ics43432_driver = {
63	.driver = {
64		.name = "ics43432",
65		.of_match_table = of_match_ptr(ics43432_ids),
66	},
67	.probe = ics43432_probe,
 
68};
69
70module_platform_driver(ics43432_driver);
71
72MODULE_DESCRIPTION("ASoC ICS43432 driver");
73MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
74MODULE_LICENSE("GPL v2");

 
 1/*
 2 * I2S MEMS microphone driver for InvenSense ICS-43432
 
 3 *
 4 * - Non configurable.
 5 * - I2S interface, 64 BCLs per frame, 32 bits per channel, 24 bit data
 6 *
 7 * Copyright (c) 2015 Axis Communications AB
 8 *
 9 * Licensed under GPL v2.
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/slab.h>
15#include <sound/core.h>
16#include <sound/pcm.h>
17#include <sound/pcm_params.h>
18#include <sound/soc.h>
19#include <sound/initval.h>
20#include <sound/tlv.h>
21
22#define ICS43432_RATE_MIN 7190 /* Hz, from data sheet */
23#define ICS43432_RATE_MAX 52800  /* Hz, from data sheet */
24
25#define ICS43432_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
26
27static struct snd_soc_dai_driver ics43432_dai = {
28	.name = "ics43432-hifi",
29	.capture = {
30		.stream_name = "Capture",
31		.channels_min = 1,
32		.channels_max = 2,
33		.rate_min = ICS43432_RATE_MIN,
34		.rate_max = ICS43432_RATE_MAX,
35		.rates = SNDRV_PCM_RATE_CONTINUOUS,
36		.formats = ICS43432_FORMATS,
37	},
38};
39
40static struct snd_soc_codec_driver ics43432_codec_driver = {
 
 
 
41};
42
43static int ics43432_probe(struct platform_device *pdev)
44{
45	return snd_soc_register_codec(&pdev->dev, &ics43432_codec_driver,
 
46			&ics43432_dai, 1);
47}
48
49static int ics43432_remove(struct platform_device *pdev)
50{
51	snd_soc_unregister_codec(&pdev->dev);
52	return 0;
53}
54
55#ifdef CONFIG_OF
56static const struct of_device_id ics43432_ids[] = {
57	{ .compatible = "invensense,ics43432", },
 
58	{ }
59};
60MODULE_DEVICE_TABLE(of, ics43432_ids);
61#endif
62
63static struct platform_driver ics43432_driver = {
64	.driver = {
65		.name = "ics43432",
66		.of_match_table = of_match_ptr(ics43432_ids),
67	},
68	.probe = ics43432_probe,
69	.remove = ics43432_remove,
70};
71
72module_platform_driver(ics43432_driver);
73
74MODULE_DESCRIPTION("ASoC ICS43432 driver");
75MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
76MODULE_LICENSE("GPL v2");