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
27 static 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
40 static const struct snd_soc_component_driver ics43432_component_driver = {
41 .idle_bias_on = 1,
42 .use_pmdown_time = 1,
43 .endianness = 1,
44 };
45
46 static 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
54 static const struct of_device_id ics43432_ids[] = {
55 { .compatible = "invensense,ics43432", },
56 { .compatible = "cui,cmm-4030d-261", },
57 { }
58 };
59 MODULE_DEVICE_TABLE(of, ics43432_ids);
60 #endif
61
62 static 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
70 module_platform_driver(ics43432_driver);
71
72 MODULE_DESCRIPTION("ASoC ICS43432 driver");
73 MODULE_AUTHOR("Ricard Wanderlof <ricardw@axis.com>");
74 MODULE_LICENSE("GPL v2");
75
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