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
28 static const struct snd_soc_dapm_widget hdmi_widgets[] = {
29 SND_SOC_DAPM_INPUT("RX"),
30 SND_SOC_DAPM_OUTPUT("TX"),
31 };
32
33 static const struct snd_soc_dapm_route hdmi_routes[] = {
34 { "Capture", NULL, "RX" },
35 { "TX", NULL, "Playback" },
36 };
37
38 static 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
67 static const struct of_device_id hdmi_audio_codec_ids[] = {
68 { .compatible = "linux,hdmi-audio", },
69 { }
70 };
71 MODULE_DEVICE_TABLE(of, hdmi_audio_codec_ids);
72 #endif
73
74 static 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
hdmi_codec_probe(struct platform_device * pdev)82 static 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
hdmi_codec_remove(struct platform_device * pdev)88 static int hdmi_codec_remove(struct platform_device *pdev)
89 {
90 snd_soc_unregister_codec(&pdev->dev);
91 return 0;
92 }
93
94 static 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
104 module_platform_driver(hdmi_codec_driver);
105
106 MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
107 MODULE_DESCRIPTION("ASoC generic HDMI codec driver");
108 MODULE_LICENSE("GPL");
109 MODULE_ALIAS("platform:" DRV_NAME);
110