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 <log.h>
  15 #include <misc.h>
  16 #include <sound.h>
  17 #include <asm/arch-rockchip/periph.h>
  18 #include <dm/pinctrl.h>
  19
  20 static int rockchip_sound_setup(struct udevice *dev)
  21 {
  22         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  23         struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
  24         int ret;
  25
  26         if (uc_priv->setup_done)
  27                 return -EALREADY;
  28         ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
  29                                      i2c_priv->samplingrate,
  30                                      i2c_priv->samplingrate * i2c_priv->rfs,
  31                                      i2c_priv->bitspersample,
  32                                      i2c_priv->channels);
  33         if (ret)
  34                 return ret;
  35         uc_priv->setup_done = true;
  36
  37         return 0;
  38 }
  39
  40 static int rockchip_sound_play(struct udevice *dev, void *data, uint data_size)
  41 {
  42         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  43
  44         return i2s_tx_data(uc_priv->i2s, data, data_size);
  45 }
  46
  47 static int rockchip_sound_probe(struct udevice *dev)
  48 {
  49         struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  50         struct ofnode_phandle_args args;
  51         struct udevice *pinctrl;
  52         struct clk clk;
  53         ofnode node;
  54         int ret;
  55
  56         node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
  57         if (!ofnode_valid(node)) {
  58                 log_debug("Failed to find /cpu subnode\n");
  59                 return -EINVAL;
  60         }
  61         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
  62                                              "#sound-dai-cells", 0, 0, &args);
  63         if (ret) {
  64                 log_debug("Cannot find i2s phandle: %d\n", ret);
  65                 return ret;
  66         }
  67         ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
  68         if (ret) {
  69                 log_debug("Cannot find i2s: %d\n", ret);
  70                 return ret;
  71         }
  72
  73         node = ofnode_find_subnode(dev_ofnode(dev), "codec");
  74         if (!ofnode_valid(node)) {
  75                 log_debug("Failed to find /codec subnode\n");
  76                 return -EINVAL;
  77         }
  78         ret = ofnode_parse_phandle_with_args(node, "sound-dai",
  79                                              "#sound-dai-cells", 0, 0, &args);
  80         if (ret) {
  81                 log_debug("Cannot find codec phandle: %d\n", ret);
  82                 return ret;
  83         }
  84         ret = uclass_get_device_by_ofnode(UCLASS_AUDIO_CODEC, args.node,
  85                                           &uc_priv->codec);
  86         if (ret) {
  87                 log_debug("Cannot find audio codec: %d\n", ret);
  88                 return ret;
  89         }
  90         ret = clk_get_by_index(uc_priv->i2s, 1, &clk);
  91         if (ret) {
  92                 log_debug("Cannot find clock: %d\n", ret);
  93                 return ret;
  94         }
  95         ret = clk_set_rate(&clk, 12288000);
  96         if (ret < 0) {
  97                 log_debug("Cannot find clock: %d\n", ret);
  98                 return ret;
  99         }
 100         ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
 101         if (ret) {
 102                 debug("%s: Cannot find pinctrl device\n", __func__);
 103                 return ret;
 104         }
 105         ret = pinctrl_request(pinctrl, PERIPH_ID_I2S, 0);
 106         if (ret) {
 107                 debug("%s: Cannot select I2C pinctrl\n", __func__);
 108                 return ret;
 109         }
 110
 111         log_debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
 112                   uc_priv->codec->name, uc_priv->i2s->name);
 113
 114         return 0;
 115 }
 116
 117 static const struct sound_ops rockchip_sound_ops = {
 118         .setup  = rockchip_sound_setup,
 119         .play   = rockchip_sound_play,
 120 };
 121
 122 static const struct udevice_id rockchip_sound_ids[] = {
 123         { .compatible = "rockchip,audio-max98090-jerry" },
 124         { }
 125 };
 126
 127 U_BOOT_DRIVER(rockchip_sound) = {
 128         .name           = "rockchip_sound",
 129         .id             = UCLASS_SOUND,
 130         .of_match       = rockchip_sound_ids,
 131         .probe          = rockchip_sound_probe,
 132         .ops            = &rockchip_sound_ops,
 133 };