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
12struct 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
19static 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
27static 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
45static const struct snd_soc_component_driver sirf_audio_port_component = {
46	.name       = "sirf-audio-port",
47};
48
49static 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
68static const struct of_device_id sirf_audio_port_of_match[] = {
69	{ .compatible = "sirf,audio-port", },
70	{}
71};
72MODULE_DEVICE_TABLE(of, sirf_audio_port_of_match);
73
74static 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
82module_platform_driver(sirf_audio_port_driver);
83
84MODULE_DESCRIPTION("SiRF Audio Port driver");
85MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
86MODULE_LICENSE("GPL v2");
87