db1200.c 3.4 KB

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  1. /*
  2. * DB1200 ASoC audio fabric support code.
  3. *
  4. * (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
  5. *
  6. */
  7. #include <linux/module.h>
  8. #include <linux/moduleparam.h>
  9. #include <linux/timer.h>
  10. #include <linux/interrupt.h>
  11. #include <linux/platform_device.h>
  12. #include <sound/core.h>
  13. #include <sound/pcm.h>
  14. #include <sound/soc.h>
  15. #include <sound/soc-dapm.h>
  16. #include <asm/mach-au1x00/au1000.h>
  17. #include <asm/mach-au1x00/au1xxx_psc.h>
  18. #include <asm/mach-au1x00/au1xxx_dbdma.h>
  19. #include <asm/mach-db1x00/bcsr.h>
  20. #include "../codecs/ac97.h"
  21. #include "../codecs/wm8731.h"
  22. #include "psc.h"
  23. /*------------------------- AC97 PART ---------------------------*/
  24. static struct snd_soc_dai_link db1200_ac97_dai = {
  25. .name = "AC97",
  26. .stream_name = "AC97 HiFi",
  27. .cpu_dai = &au1xpsc_ac97_dai,
  28. .codec_dai = &ac97_dai,
  29. };
  30. static struct snd_soc_card db1200_ac97_machine = {
  31. .name = "DB1200_AC97",
  32. .dai_link = &db1200_ac97_dai,
  33. .num_links = 1,
  34. .platform = &au1xpsc_soc_platform,
  35. };
  36. static struct snd_soc_device db1200_ac97_devdata = {
  37. .card = &db1200_ac97_machine,
  38. .codec_dev = &soc_codec_dev_ac97,
  39. };
  40. /*------------------------- I2S PART ---------------------------*/
  41. static int db1200_i2s_startup(struct snd_pcm_substream *substream)
  42. {
  43. struct snd_soc_pcm_runtime *rtd = substream->private_data;
  44. struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  45. struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
  46. int ret;
  47. /* WM8731 has its own 12MHz crystal */
  48. snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
  49. 12000000, SND_SOC_CLOCK_IN);
  50. /* codec is bitclock and lrclk master */
  51. ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
  52. SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  53. if (ret < 0)
  54. goto out;
  55. ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
  56. SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
  57. if (ret < 0)
  58. goto out;
  59. ret = 0;
  60. out:
  61. return ret;
  62. }
  63. static struct snd_soc_ops db1200_i2s_wm8731_ops = {
  64. .startup = db1200_i2s_startup,
  65. };
  66. static struct snd_soc_dai_link db1200_i2s_dai = {
  67. .name = "WM8731",
  68. .stream_name = "WM8731 PCM",
  69. .cpu_dai = &au1xpsc_i2s_dai,
  70. .codec_dai = &wm8731_dai,
  71. .ops = &db1200_i2s_wm8731_ops,
  72. };
  73. static struct snd_soc_card db1200_i2s_machine = {
  74. .name = "DB1200_I2S",
  75. .dai_link = &db1200_i2s_dai,
  76. .num_links = 1,
  77. .platform = &au1xpsc_soc_platform,
  78. };
  79. static struct snd_soc_device db1200_i2s_devdata = {
  80. .card = &db1200_i2s_machine,
  81. .codec_dev = &soc_codec_dev_wm8731,
  82. };
  83. /*------------------------- COMMON PART ---------------------------*/
  84. static struct platform_device *db1200_asoc_dev;
  85. static int __init db1200_audio_load(void)
  86. {
  87. int ret;
  88. ret = -ENOMEM;
  89. db1200_asoc_dev = platform_device_alloc("soc-audio", -1);
  90. if (!db1200_asoc_dev)
  91. goto out;
  92. /* DB1200 board setup set PSC1MUX to preferred audio device */
  93. if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
  94. platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_devdata);
  95. else
  96. platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_devdata);
  97. db1200_ac97_devdata.dev = &db1200_asoc_dev->dev;
  98. db1200_i2s_devdata.dev = &db1200_asoc_dev->dev;
  99. ret = platform_device_add(db1200_asoc_dev);
  100. if (ret) {
  101. platform_device_put(db1200_asoc_dev);
  102. db1200_asoc_dev = NULL;
  103. }
  104. out:
  105. return ret;
  106. }
  107. static void __exit db1200_audio_unload(void)
  108. {
  109. platform_device_unregister(db1200_asoc_dev);
  110. }
  111. module_init(db1200_audio_load);
  112. module_exit(db1200_audio_unload);
  113. MODULE_LICENSE("GPL");
  114. MODULE_DESCRIPTION("DB1200 ASoC audio support");
  115. MODULE_AUTHOR("Manuel Lauss");