GNU Linux-libre 4.9.314-gnu1
[releases.git] / sound / soc / sirf / sirf-audio-port.c
1 /*
2  * SiRF Audio port driver
3  *
4  * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
5  *
6  * Licensed under GPLv2 or later.
7  */
8 #include <linux/module.h>
9 #include <sound/soc.h>
10 #include <sound/dmaengine_pcm.h>
11
12 struct sirf_audio_port {
13         struct regmap *regmap;
14         struct snd_dmaengine_dai_dma_data playback_dma_data;
15         struct snd_dmaengine_dai_dma_data capture_dma_data;
16 };
17
18
19 static int sirf_audio_port_dai_probe(struct snd_soc_dai *dai)
20 {
21         struct sirf_audio_port *port = snd_soc_dai_get_drvdata(dai);
22         snd_soc_dai_init_dma_data(dai, &port->playback_dma_data,
23                         &port->capture_dma_data);
24         return 0;
25 }
26
27 static struct snd_soc_dai_driver sirf_audio_port_dai = {
28         .probe = sirf_audio_port_dai_probe,
29         .name = "sirf-audio-port",
30         .id = 0,
31         .playback = {
32                 .channels_min = 2,
33                 .channels_max = 2,
34                 .rates = SNDRV_PCM_RATE_48000,
35                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
36         },
37         .capture = {
38                 .channels_min = 1,
39                 .channels_max = 2,
40                 .rates = SNDRV_PCM_RATE_48000,
41                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
42         },
43 };
44
45 static const struct snd_soc_component_driver sirf_audio_port_component = {
46         .name       = "sirf-audio-port",
47 };
48
49 static int sirf_audio_port_probe(struct platform_device *pdev)
50 {
51         int ret;
52         struct sirf_audio_port *port;
53
54         port = devm_kzalloc(&pdev->dev,
55                         sizeof(struct sirf_audio_port), GFP_KERNEL);
56         if (!port)
57                 return -ENOMEM;
58
59         ret = devm_snd_soc_register_component(&pdev->dev,
60                         &sirf_audio_port_component, &sirf_audio_port_dai, 1);
61         if (ret)
62                 return ret;
63
64         platform_set_drvdata(pdev, port);
65         return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
66 }
67
68 static const struct of_device_id sirf_audio_port_of_match[] = {
69         { .compatible = "sirf,audio-port", },
70         {}
71 };
72 MODULE_DEVICE_TABLE(of, sirf_audio_port_of_match);
73
74 static struct platform_driver sirf_audio_port_driver = {
75         .driver = {
76                 .name = "sirf-audio-port",
77                 .of_match_table = sirf_audio_port_of_match,
78         },
79         .probe = sirf_audio_port_probe,
80 };
81
82 module_platform_driver(sirf_audio_port_driver);
83
84 MODULE_DESCRIPTION("SiRF Audio Port driver");
85 MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
86 MODULE_LICENSE("GPL v2");