1 // SPDX-License-Identifier: GPL-2.0
2 // ak4554.c
3 //
4 // Copyright (C) 2013 Renesas Solutions Corp.
5 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6
7 #include <linux/module.h>
8 #include <sound/soc.h>
9
10 /*
11 * ak4554 is very simple DA/AD converter which has no setting register.
12 *
13 * CAUTION
14 *
15 * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
16 * and, capture format is SND_SOC_DAIFMT_LEFT_J
17 * on same bit clock, LR clock.
18 * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
19 *
20 * CPU/Codec DAI image
21 *
22 * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
23 * |
24 * CPU-DAI2 (capture only fmt = LEFT_J) ---+
25 */
26
27 static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
28 SND_SOC_DAPM_INPUT("AINL"),
29 SND_SOC_DAPM_INPUT("AINR"),
30
31 SND_SOC_DAPM_OUTPUT("AOUTL"),
32 SND_SOC_DAPM_OUTPUT("AOUTR"),
33 };
34
35 static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
36 { "Capture", NULL, "AINL" },
37 { "Capture", NULL, "AINR" },
38
39 { "AOUTL", NULL, "Playback" },
40 { "AOUTR", NULL, "Playback" },
41 };
42
43 static struct snd_soc_dai_driver ak4554_dai = {
44 .name = "ak4554-hifi",
45 .playback = {
46 .stream_name = "Playback",
47 .channels_min = 2,
48 .channels_max = 2,
49 .rates = SNDRV_PCM_RATE_8000_48000,
50 .formats = SNDRV_PCM_FMTBIT_S16_LE,
51 },
52 .capture = {
53 .stream_name = "Capture",
54 .channels_min = 2,
55 .channels_max = 2,
56 .rates = SNDRV_PCM_RATE_8000_48000,
57 .formats = SNDRV_PCM_FMTBIT_S16_LE,
58 },
59 .symmetric_rates = 1,
60 };
61
62 static const struct snd_soc_component_driver soc_component_dev_ak4554 = {
63 .dapm_widgets = ak4554_dapm_widgets,
64 .num_dapm_widgets = ARRAY_SIZE(ak4554_dapm_widgets),
65 .dapm_routes = ak4554_dapm_routes,
66 .num_dapm_routes = ARRAY_SIZE(ak4554_dapm_routes),
67 .idle_bias_on = 1,
68 .use_pmdown_time = 1,
69 .endianness = 1,
70 .non_legacy_dai_naming = 1,
71 };
72
ak4554_soc_probe(struct platform_device * pdev)73 static int ak4554_soc_probe(struct platform_device *pdev)
74 {
75 return devm_snd_soc_register_component(&pdev->dev,
76 &soc_component_dev_ak4554,
77 &ak4554_dai, 1);
78 }
79
80 static const struct of_device_id ak4554_of_match[] = {
81 { .compatible = "asahi-kasei,ak4554" },
82 {},
83 };
84 MODULE_DEVICE_TABLE(of, ak4554_of_match);
85
86 static struct platform_driver ak4554_driver = {
87 .driver = {
88 .name = "ak4554-adc-dac",
89 .of_match_table = ak4554_of_match,
90 },
91 .probe = ak4554_soc_probe,
92 };
93 module_platform_driver(ak4554_driver);
94
95 MODULE_LICENSE("GPL v2");
96 MODULE_DESCRIPTION("SoC AK4554 driver");
97 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
98
