sound/soc/rockchip/card_info.c

   1 /*
   2  *  card_info.c
   3  *
   4  *  This program is free software; you can redistribute  it and/or modify it
   5  *  under  the terms of  the GNU General  Public License as published by the
   6  *  Free Software Foundation;  either version 2 of the  License, or (at your
   7  *  option) any later version.
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/of.h>
  14 #include <sound/core.h>
  15 #include <sound/pcm.h>
  16 #include <sound/soc.h>
  17
  18 /*
  19   Get sound card infos:
  20       audio-codec
  21       audio-controller
  22
  23       format
  24
  25       continuous-clock
  26
  27       bitclock-inversion
  28       frame-inversion
  29
  30       bitclock-master
  31       frame-master
  32
  33   Get audio-codec and audio-controller in this fun,
  34   and get oher infos in fun snd_soc_of_parse_daifmt().
  35
  36   Set in dts:
  37                 dais {
  38                         dai0 {
  39                                 audio-codec = <&codec_of_node>;
  40                                 audio-controller = <&cpu_of_node>;
  41                                 format = "i2s";
  42                                 //continuous-clock;
  43                                 //bitclock-inversion;
  44                                 //frame-inversion;
  45                                 //bitclock-master;
  46                                 //frame-master;
  47                         };
  48
  49                         dai1 {
  50                                 audio-codec = <&codec_of_node>;
  51                                 audio-controller = <&cpu_of_node>;
  52                                 format = "dsp_a";
  53                                 //continuous-clock;
  54                                 bitclock-inversion;
  55                                 //frame-inversion;
  56                                 //bitclock-master;
  57                                 //frame-master;
  58                         };
  59                 };
  60  */
  61 int rockchip_of_get_sound_card_info_(struct snd_soc_card *card,
  62                                      bool is_need_fmt)
  63 {
  64         struct device_node *dai_node, *child_dai_node;
  65         int dai_num;
  66
  67         dai_node = of_get_child_by_name(card->dev->of_node, "dais");
  68         if (!dai_node) {
  69                 dev_err(card->dev, "%s() Can not get child: dais\n",
  70                         __func__);
  71                 return -EINVAL;
  72         }
  73
  74         dai_num = 0;
  75
  76         for_each_child_of_node(dai_node, child_dai_node) {
  77                 if (is_need_fmt) {
  78                         card->dai_link[dai_num].dai_fmt =
  79                                 snd_soc_of_parse_daifmt(child_dai_node, NULL);
  80                         if ((card->dai_link[dai_num].dai_fmt &
  81                                 SND_SOC_DAIFMT_MASTER_MASK) == 0) {
  82                                 dev_err(card->dev,
  83                                         "Property 'format' missing or invalid\n");
  84                                 return -EINVAL;
  85                         }
  86                 }
  87
  88                 card->dai_link[dai_num].codec_name = NULL;
  89                 card->dai_link[dai_num].cpu_dai_name = NULL;
  90                 card->dai_link[dai_num].platform_name = NULL;
  91
  92                 card->dai_link[dai_num].codec_of_node = of_parse_phandle(
  93                         child_dai_node,
  94                         "audio-codec", 0);
  95                 if (!card->dai_link[dai_num].codec_of_node) {
  96                         dev_err(card->dev,
  97                                 "Property 'audio-codec' missing or invalid\n");
  98                         return -EINVAL;
  99                 }
 100
 101                 card->dai_link[dai_num].cpu_of_node = of_parse_phandle(
 102                         child_dai_node,
 103                         "audio-controller", 0);
 104                 if (!card->dai_link[dai_num].cpu_of_node) {
 105                         dev_err(card->dev,
 106                                 "Property 'audio-controller' missing or invalid\n");
 107                         return -EINVAL;
 108                 }
 109
 110                 card->dai_link[dai_num].platform_of_node =
 111                         card->dai_link[dai_num].cpu_of_node;
 112
 113                 if (++dai_num >= card->num_links)
 114                         break;
 115         }
 116
 117         if (dai_num < card->num_links) {
 118                 dev_err(card->dev, "%s() Can not get enough property for dais, dai: %d, max dai num: %d\n",
 119                         __func__, dai_num, card->num_links);
 120                 return -EINVAL;
 121         }
 122
 123         return 0;
 124 }
 125 EXPORT_SYMBOL_GPL(rockchip_of_get_sound_card_info_);
 126
 127 int rockchip_of_get_sound_card_info(struct snd_soc_card *card)
 128 {
 129         return rockchip_of_get_sound_card_info_(card, true);
 130 }
 131 EXPORT_SYMBOL_GPL(rockchip_of_get_sound_card_info);
 132
 133 /* Module information */
 134 MODULE_AUTHOR("Jear <Jear.Chen@rock-chips.com>");
 135 MODULE_DESCRIPTION("ROCKCHIP ASoC Interface");
 136 MODULE_LICENSE("GPL");