spdif_transciever.c 1.8 KB

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  1. /*
  2. * ALSA SoC SPDIF DIT driver
  3. *
  4. * This driver is used by controllers which can operate in DIT (SPDI/F) where
  5. * no codec is needed. This file provides stub codec that can be used
  6. * in these configurations. TI DaVinci Audio controller uses this driver.
  7. *
  8. * Author: Steve Chen, <schen@mvista.com>
  9. * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
  10. * Copyright: (C) 2009 Texas Instruments, India
  11. *
  12. * This program is free software; you can redistribute it and/or modify
  13. * it under the terms of the GNU General Public License version 2 as
  14. * published by the Free Software Foundation.
  15. */
  16. #include <linux/module.h>
  17. #include <linux/moduleparam.h>
  18. #include <linux/slab.h>
  19. #include <sound/soc.h>
  20. #include <sound/pcm.h>
  21. #include <sound/initval.h>
  22. #define DRV_NAME "spdif-dit"
  23. #define STUB_RATES SNDRV_PCM_RATE_8000_96000
  24. #define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
  25. static struct snd_soc_codec_driver soc_codec_spdif_dit;
  26. static struct snd_soc_dai_driver dit_stub_dai = {
  27. .name = "dit-hifi",
  28. .playback = {
  29. .stream_name = "Playback",
  30. .channels_min = 1,
  31. .channels_max = 384,
  32. .rates = STUB_RATES,
  33. .formats = STUB_FORMATS,
  34. },
  35. };
  36. static int spdif_dit_probe(struct platform_device *pdev)
  37. {
  38. return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
  39. &dit_stub_dai, 1);
  40. }
  41. static int spdif_dit_remove(struct platform_device *pdev)
  42. {
  43. snd_soc_unregister_codec(&pdev->dev);
  44. return 0;
  45. }
  46. static struct platform_driver spdif_dit_driver = {
  47. .probe = spdif_dit_probe,
  48. .remove = spdif_dit_remove,
  49. .driver = {
  50. .name = DRV_NAME,
  51. .owner = THIS_MODULE,
  52. },
  53. };
  54. module_platform_driver(spdif_dit_driver);
  55. MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
  56. MODULE_DESCRIPTION("SPDIF dummy codec driver");
  57. MODULE_LICENSE("GPL");
  58. MODULE_ALIAS("platform:" DRV_NAME);