LXR uboot/drivers/sound/samsung

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2018 Google, LLC
   4 * Written by Simon Glass <sjg@chromium.org>
   5 */
   6
   7#include <common.h>
   8#include <audio_codec.h>
   9#include <dm.h>
  10#include <i2s.h>
  11#include <log.h>
  12#include <sound.h>
  13#include <asm/gpio.h>
  14#include <asm/arch/power.h>
  15
  16static int samsung_sound_setup(struct udevice *dev)
  17{
  18        struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  19        struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
  20        int ret;
  21
  22        if (uc_priv->setup_done)
  23                return -EALREADY;
  24        ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
  25                                     i2c_priv->samplingrate,
  26                                     i2c_priv->samplingrate * i2c_priv->rfs,
  27                                     i2c_priv->bitspersample,
  28                                     i2c_priv->channels);
  29        if (ret)
  30                return ret;
  31        uc_priv->setup_done = true;
  32
  33        return 0;
  34}
  35
  36static int samsung_sound_play(struct udevice *dev, void *data, uint data_size)
  37{
  38        struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  39
  40        return i2s_tx_data(uc_priv->i2s, data, data_size);
  41}
  42
  43static int samsung_sound_probe(struct udevice *dev)
  44{
  45        struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
  46        struct ofnode_phandle_args args;
  47        struct gpio_desc en_gpio;
  48        ofnode node;
  49        int ret;
  50
  51        ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
  52                                   GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
  53
  54        /* Turn on the GPIO which connects to the codec's "enable" line. */
  55        if (!ret)
  56                gpio_set_pull(gpio_get_number(&en_gpio), S5P_GPIO_PULL_NONE);
  57
  58        ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
  59                                           "samsung,audio-codec",
  60                                           &uc_priv->codec);
  61        if (ret) {
  62                debug("Failed to probe audio codec\n");
  63                return ret;
  64        }
  65        node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
  66        if (!ofnode_valid(node)) {
  67                debug("Failed to find /cpu subnode\n");
  68                return -EINVAL;
  69        }
  70        ret = ofnode_parse_phandle_with_args(node, "sound-dai",
  71                                             "#sound-dai-cells", 0, 0, &args);
  72        if (ret) {
  73                debug("Cannot find phandle: %d\n", ret);
  74                return ret;
  75        }
  76        ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
  77        if (ret) {
  78                debug("Cannot find i2s: %d\n", ret);
  79                return ret;
  80        }
  81        debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
  82              uc_priv->codec->name, uc_priv->i2s->name);
  83
  84        /* Enable codec clock */
  85        set_xclkout();
  86
  87        return 0;
  88}
  89
  90static const struct sound_ops samsung_sound_ops = {
  91        .setup  = samsung_sound_setup,
  92        .play   = samsung_sound_play,
  93};
  94
  95static const struct udevice_id samsung_sound_ids[] = {
  96        { .compatible = "google,snow-audio-max98095" },
  97        { .compatible = "google,spring-audio-max98088" },
  98        { .compatible = "samsung,smdk5420-audio-wm8994" },
  99        { .compatible = "google,peach-audio-max98090" },
 100        { }
 101};
 102
 103U_BOOT_DRIVER(samsung_sound) = {
 104        .name           = "samsung_sound",
 105        .id             = UCLASS_SOUND,
 106        .of_match       = samsung_sound_ids,
 107        .probe          = samsung_sound_probe,
 108        .ops            = &samsung_sound_ops,
 109};
 110