1/*
2 * ALSA SoC codec driver for HDMI audio codecs.
3 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Ricardo Neri <ricardo.neri@ti.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21#include <linux/module.h>
22#include <sound/soc.h>
23#include <linux/of.h>
24#include <linux/of_device.h>
25
26#define DRV_NAME "hdmi-audio-codec"
27
28static const struct snd_soc_dapm_widget hdmi_widgets[] = {
29	SND_SOC_DAPM_INPUT("RX"),
30	SND_SOC_DAPM_OUTPUT("TX"),
31};
32
33static const struct snd_soc_dapm_route hdmi_routes[] = {
34	{ "Capture", NULL, "RX" },
35	{ "TX", NULL, "Playback" },
36};
37
38static struct snd_soc_dai_driver hdmi_codec_dai = {
39	.name = "hdmi-hifi",
40	.playback = {
41		.stream_name = "Playback",
42		.channels_min = 2,
43		.channels_max = 8,
44		.rates = SNDRV_PCM_RATE_32000 |
45			SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
46			SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
47			SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
48		.formats = SNDRV_PCM_FMTBIT_S16_LE |
49			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
50		.sig_bits = 24,
51	},
52	.capture = {
53		.stream_name = "Capture",
54		.channels_min = 2,
55		.channels_max = 2,
56		.rates = SNDRV_PCM_RATE_32000 |
57			SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
58			SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
59			SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
60		.formats = SNDRV_PCM_FMTBIT_S16_LE |
61			SNDRV_PCM_FMTBIT_S24_LE,
62	},
63
64};
65
66#ifdef CONFIG_OF
67static const struct of_device_id hdmi_audio_codec_ids[] = {
68	{ .compatible = "linux,hdmi-audio", },
69	{ }
70};
71MODULE_DEVICE_TABLE(of, hdmi_audio_codec_ids);
72#endif
73
74static struct snd_soc_codec_driver hdmi_codec = {
75	.dapm_widgets = hdmi_widgets,
76	.num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
77	.dapm_routes = hdmi_routes,
78	.num_dapm_routes = ARRAY_SIZE(hdmi_routes),
79	.ignore_pmdown_time = true,
80};
81
82static int hdmi_codec_probe(struct platform_device *pdev)
83{
84	return snd_soc_register_codec(&pdev->dev, &hdmi_codec,
85			&hdmi_codec_dai, 1);
86}
87
88static int hdmi_codec_remove(struct platform_device *pdev)
89{
90	snd_soc_unregister_codec(&pdev->dev);
91	return 0;
92}
93
94static struct platform_driver hdmi_codec_driver = {
95	.driver		= {
96		.name	= DRV_NAME,
97		.of_match_table = of_match_ptr(hdmi_audio_codec_ids),
98	},
99
100	.probe		= hdmi_codec_probe,
101	.remove		= hdmi_codec_remove,
102};
103
104module_platform_driver(hdmi_codec_driver);
105
106MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
107MODULE_DESCRIPTION("ASoC generic HDMI codec driver");
108MODULE_LICENSE("GPL");
109MODULE_ALIAS("platform:" DRV_NAME);
110