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>");