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
  23         snd_soc_dai_init_dma_data(dai, &port->playback_dma_data,
  24                         &port->capture_dma_data);
  25         return 0;
  26 }
  27
  28 static 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
  46 static const struct snd_soc_component_driver sirf_audio_port_component = {
  47         .name       = "sirf-audio-port",
  48 };
  49
  50 static 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
  69 static const struct of_device_id sirf_audio_port_of_match[] = {
  70         { .compatible = "sirf,audio-port", },
  71         {}
  72 };
  73 MODULE_DEVICE_TABLE(of, sirf_audio_port_of_match);
  74
  75 static 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
  83 module_platform_driver(sirf_audio_port_driver);
  84
  85 MODULE_DESCRIPTION("SiRF Audio Port driver");
  86 MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
  87 MODULE_LICENSE("GPL v2");