1/*
2 * ak4554.c
3 *
4 * Copyright (C) 2013 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <sound/soc.h>
14
15/*
16 * ak4554 is very simple DA/AD converter which has no setting register.
17 *
18 * CAUTION
19 *
20 * ak4554 playback format is SND_SOC_DAIFMT_RIGHT_J,
21 * and,   capture  format is SND_SOC_DAIFMT_LEFT_J
22 * on same bit clock, LR clock.
23 * But, this driver doesn't have snd_soc_dai_ops :: set_fmt
24 *
25 * CPU/Codec DAI image
26 *
27 * CPU-DAI1 (plaback only fmt = RIGHT_J) --+-- ak4554
28 *					   |
29 * CPU-DAI2 (capture only fmt = LEFT_J) ---+
30 */
31
32static const struct snd_soc_dapm_widget ak4554_dapm_widgets[] = {
33SND_SOC_DAPM_INPUT("AINL"),
34SND_SOC_DAPM_INPUT("AINR"),
35
36SND_SOC_DAPM_OUTPUT("AOUTL"),
37SND_SOC_DAPM_OUTPUT("AOUTR"),
38};
39
40static const struct snd_soc_dapm_route ak4554_dapm_routes[] = {
41	{ "Capture", NULL, "AINL" },
42	{ "Capture", NULL, "AINR" },
43
44	{ "AOUTL", NULL, "Playback" },
45	{ "AOUTR", NULL, "Playback" },
46};
47
48static struct snd_soc_dai_driver ak4554_dai = {
49	.name = "ak4554-hifi",
50	.playback = {
51		.stream_name = "Playback",
52		.channels_min = 2,
53		.channels_max = 2,
54		.rates = SNDRV_PCM_RATE_8000_48000,
55		.formats = SNDRV_PCM_FMTBIT_S16_LE,
56	},
57	.capture = {
58		.stream_name = "Capture",
59		.channels_min = 2,
60		.channels_max = 2,
61		.rates = SNDRV_PCM_RATE_8000_48000,
62		.formats = SNDRV_PCM_FMTBIT_S16_LE,
63	},
64	.symmetric_rates = 1,
65};
66
67static struct snd_soc_codec_driver soc_codec_dev_ak4554 = {
68	.dapm_widgets = ak4554_dapm_widgets,
69	.num_dapm_widgets = ARRAY_SIZE(ak4554_dapm_widgets),
70	.dapm_routes = ak4554_dapm_routes,
71	.num_dapm_routes = ARRAY_SIZE(ak4554_dapm_routes),
72};
73
74static int ak4554_soc_probe(struct platform_device *pdev)
75{
76	return snd_soc_register_codec(&pdev->dev,
77				      &soc_codec_dev_ak4554,
78				      &ak4554_dai, 1);
79}
80
81static int ak4554_soc_remove(struct platform_device *pdev)
82{
83	snd_soc_unregister_codec(&pdev->dev);
84	return 0;
85}
86
87static const struct of_device_id ak4554_of_match[] = {
88	{ .compatible = "asahi-kasei,ak4554" },
89	{},
90};
91MODULE_DEVICE_TABLE(of, ak4554_of_match);
92
93static struct platform_driver ak4554_driver = {
94	.driver = {
95		.name = "ak4554-adc-dac",
96		.of_match_table = ak4554_of_match,
97	},
98	.probe	= ak4554_soc_probe,
99	.remove	= ak4554_soc_remove,
100};
101module_platform_driver(ak4554_driver);
102
103MODULE_LICENSE("GPL");
104MODULE_DESCRIPTION("SoC AK4554 driver");
105MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
106