LXR linux/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
  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
  23        snd_soc_dai_init_dma_data(dai, &port->playback_dma_data,
  24                        &port->capture_dma_data);
  25        return 0;
  26}
  27
  28static struct snd_soc_dai_driver sirf_audio_port_dai = {
  29        .probe = sirf_audio_port_dai_probe,
  30        .name = "sirf-audio-port",
  31        .id = 0,
  32        .playback = {
  33                .channels_min = 2,
  34                .channels_max = 2,
  35                .rates = SNDRV_PCM_RATE_48000,
  36                .formats = SNDRV_PCM_FMTBIT_S16_LE,
  37        },
  38        .capture = {
  39                .channels_min = 1,
  40                .channels_max = 2,
  41                .rates = SNDRV_PCM_RATE_48000,
  42                .formats = SNDRV_PCM_FMTBIT_S16_LE,
  43        },
  44};
  45
  46static const struct snd_soc_component_driver sirf_audio_port_component = {
  47        .name       = "sirf-audio-port",
  48};
  49
  50static int sirf_audio_port_probe(struct platform_device *pdev)
  51{
  52        int ret;
  53        struct sirf_audio_port *port;
  54
  55        port = devm_kzalloc(&pdev->dev,
  56                        sizeof(struct sirf_audio_port), GFP_KERNEL);
  57        if (!port)
  58                return -ENOMEM;
  59
  60        ret = devm_snd_soc_register_component(&pdev->dev,
  61                        &sirf_audio_port_component, &sirf_audio_port_dai, 1);
  62        if (ret)
  63                return ret;
  64
  65        platform_set_drvdata(pdev, port);
  66        return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
  67}
  68
  69static const struct of_device_id sirf_audio_port_of_match[] = {
  70        { .compatible = "sirf,audio-port", },
  71        {}
  72};
  73MODULE_DEVICE_TABLE(of, sirf_audio_port_of_match);
  74
  75static struct platform_driver sirf_audio_port_driver = {
  76        .driver = {
  77                .name = "sirf-audio-port",
  78                .of_match_table = sirf_audio_port_of_match,
  79        },
  80        .probe = sirf_audio_port_probe,
  81};
  82
  83module_platform_driver(sirf_audio_port_driver);
  84
  85MODULE_DESCRIPTION("SiRF Audio Port driver");
  86MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
  87MODULE_LICENSE("GPL v2");
  88