drivers/sound/rockchip_sound.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2018 Google, LLC
   4  * Written by Simon Glass <sjg@chromium.org>
   5  */
   6
   7 #define LOG_CATEGORY UCLASS_SOUND
   8
   9 #include <common.h>
  10 #include <audio_codec.h>
  11 #include <clk.h>
  12 #include <dm.h>
  13 #include <i2s.h>
  14 #include <misc.h>
  15 #include <sound.h>
  16 #include <asm/arch-rockchip/periph.h>
  17 #include <dm/pinctrl.h>
  18
  19 static int rockchip_sound_setup(struct udevice *dev)
  20 {
  21         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  22         struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
  23         int ret;
  24
  25         if (uc_priv->setup_done)
  26                 return -EALREADY;
  27         ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
  28                                      i2c_priv->samplingrate,
  29                                      i2c_priv->samplingrate * i2c_priv->rfs,
  30                                      i2c_priv->bitspersample,
  31                                      i2c_priv->channels);
  32         if (ret)
  33                 return ret;
  34         uc_priv->setup_done = true;
  35
  36         return 0;
  37 }
  38
  39 static int rockchip_sound_play(struct udevice *dev, void *data, uint data_size)
  40 {
  41         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  42
  43         return i2s_tx_data(uc_priv->i2s, data, data_size);
  44 }
  45
  46 static int rockchip_sound_probe(struct udevice *dev)
  47 {
  48         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  49         struct ofnode_phandle_args args;
  50         struct udevice *pinctrl;
  51         struct clk clk;
  52         ofnode node;
  53         int ret;
  54
  55         node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
  56         if (!ofnode_valid(node)) {
  57                 log_debug("Failed to find /cpu subnode\n");
  58                 return -EINVAL;
  59         }
  60         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
  61                                              "#sound-dai-cells", 0, 0, &args);
  62         if (ret) {
  63                 log_debug("Cannot find i2s phandle: %d\n", ret);
  64                 return ret;
  65         }
  66         ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
  67         if (ret) {
  68                 log_debug("Cannot find i2s: %d\n", ret);
  69                 return ret;
  70         }
  71
  72         node = ofnode_find_subnode(dev_ofnode(dev), "codec");
  73         if (!ofnode_valid(node)) {
  74                 log_debug("Failed to find /codec subnode\n");
  75                 return -EINVAL;
  76         }
  77         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
  78                                              "#sound-dai-cells", 0, 0, &args);
  79         if (ret) {
  80                 log_debug("Cannot find codec phandle: %d\n", ret);
  81                 return ret;
  82         }
  83         ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
  84                                           &uc_priv->codec);
  85         if (ret) {
  86                 log_debug("Cannot find audio codec: %d\n", ret);
  87                 return ret;
  88         }
  89         ret = clk_get_by_index(uc_priv->i2s, 1, &clk);
  90         if (ret) {
  91                 log_debug("Cannot find clock: %d\n", ret);
  92                 return ret;
  93         }
  94         ret = clk_set_rate(&clk, 12288000);
  95         if (ret < 0) {
  96                 log_debug("Cannot find clock: %d\n", ret);
  97                 return ret;
  98         }
  99         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 100         if (ret) {
 101                 debug("%s: Cannot find pinctrl device\n", __func__);
 102                 return ret;
 103         }
 104         ret = pinctrl_request(pinctrl, PERIPH_ID_I2S, 0);
 105         if (ret) {
 106                 debug("%s: Cannot select I2C pinctrl\n", __func__);
 107                 return ret;
 108         }
 109
 110         log_debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
 111                   uc_priv->codec->name, uc_priv->i2s->name);
 112
 113         return 0;
 114 }
 115
 116 static const struct sound_ops rockchip_sound_ops = {
 117         .setup  = rockchip_sound_setup,
 118         .play   = rockchip_sound_play,
 119 };
 120
 121 static const struct udevice_id rockchip_sound_ids[] = {
 122         { .compatible = "rockchip,audio-max98090-jerry" },
 123         { }
 124 };
 125
 126 U_BOOT_DRIVER(rockchip_sound) = {
 127         .name           = "rockchip_sound",
 128         .id             = UCLASS_SOUND,
 129         .of_match       = rockchip_sound_ids,
 130         .probe          = rockchip_sound_probe,
 131         .ops            = &rockchip_sound_ops,
 132 };