LXR linux/sound/soc/sof/intel/hda-bus.c

   1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
   2//
   3// This file is provided under a dual BSD/GPLv2 license.  When using or
   4// redistributing this file, you may do so under either license.
   5//
   6// Copyright(c) 2018 Intel Corporation. All rights reserved.
   7//
   8// Authors: Keyon Jie <yang.jie@linux.intel.com>
   9
  10#include <linux/io.h>
  11#include <sound/hdaudio.h>
  12#include "../sof-priv.h"
  13#include "hda.h"
  14
  15#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
  16#include "../../codecs/hdac_hda.h"
  17#define sof_hda_ext_ops snd_soc_hdac_hda_get_ops()
  18#else
  19#define sof_hda_ext_ops NULL
  20#endif
  21
  22/*
  23 * This can be used for both with/without hda link support.
  24 */
  25void sof_hda_bus_init(struct hdac_bus *bus, struct device *dev)
  26{
  27#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
  28        snd_hdac_ext_bus_init(bus, dev, NULL, sof_hda_ext_ops);
  29#else /* CONFIG_SND_SOC_SOF_HDA */
  30        memset(bus, 0, sizeof(*bus));
  31        bus->dev = dev;
  32
  33        INIT_LIST_HEAD(&bus->stream_list);
  34
  35        bus->irq = -1;
  36
  37        /*
  38         * There is only one HDA bus atm. keep the index as 0.
  39         * Need to fix when there are more than one HDA bus.
  40         */
  41        bus->idx = 0;
  42
  43        spin_lock_init(&bus->reg_lock);
  44#endif /* CONFIG_SND_SOC_SOF_HDA */
  45}
  46