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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Authors: Keyon Jie <yang.jie@linux.intel.com>
//
#include <linux/module.h>
#include <sound/hdaudio_ext.h>
#include <sound/hda_codec.h>
#include <sound/hda_i915.h>
#include <sound/sof.h>
#include "../ops.h"
#include "hda.h"
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
#include "../../codecs/hdac_hda.h"
#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
#define IDISP_VID_INTEL 0x80860000
/* load the legacy HDA codec driver */
#ifdef MODULE
static void hda_codec_load_module(struct hda_codec *codec)
{
char alias[MODULE_NAME_LEN];
const char *module = alias;
snd_hdac_codec_modalias(&codec->core, alias, sizeof(alias));
dev_dbg(&codec->core.dev, "loading codec module: %s\n", module);
request_module(module);
}
#else
static void hda_codec_load_module(struct hda_codec *codec) {}
#endif
#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
/* probe individual codec */
static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
{
struct hda_bus *hbus = sof_to_hbus(sdev);
struct hdac_device *hdev;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
struct hdac_hda_priv *hda_priv;
#endif
u32 hda_cmd = (address << 28) | (AC_NODE_ROOT << 20) |
(AC_VERB_PARAMETERS << 8) | AC_PAR_VENDOR_ID;
u32 resp = -1;
int ret;
mutex_lock(&hbus->core.cmd_mutex);
snd_hdac_bus_send_cmd(&hbus->core, hda_cmd);
snd_hdac_bus_get_response(&hbus->core, address, &resp);
mutex_unlock(&hbus->core.cmd_mutex);
if (resp == -1)
return -EIO;
dev_dbg(sdev->dev, "HDA codec #%d probed OK: response: %x\n",
address, resp);
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
/* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
hda_priv = kzalloc(sizeof(*hda_priv), GFP_KERNEL);
if (!hda_priv)
return -ENOMEM;
hda_priv->codec.bus = hbus;
hdev = &hda_priv->codec.core;
ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
if (ret < 0)
return ret;
/* use legacy bus only for HDA codecs, idisp uses ext bus */
if ((resp & 0xFFFF0000) != IDISP_VID_INTEL) {
hdev->type = HDA_DEV_LEGACY;
hda_codec_load_module(&hda_priv->codec);
}
return 0;
#else
/* snd_hdac_ext_bus_device_exit will use kfree to free hdev */
hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
if (!hdev)
return -ENOMEM;
ret = snd_hdac_ext_bus_device_init(&hbus->core, address, hdev);
return ret;
#endif
}
/* Codec initialization */
int hda_codec_probe_bus(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
int i, ret;
/* probe codecs in avail slots */
for (i = 0; i < HDA_MAX_CODECS; i++) {
if (!(bus->codec_mask & (1 << i)))
continue;
ret = hda_codec_probe(sdev, i);
if (ret < 0) {
dev_err(bus->dev, "error: codec #%d probe error, ret: %d\n",
i, ret);
return ret;
}
}
return 0;
}
EXPORT_SYMBOL(hda_codec_probe_bus);
#if IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
void hda_codec_i915_get(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
dev_dbg(bus->dev, "Turning i915 HDAC power on\n");
snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
}
EXPORT_SYMBOL(hda_codec_i915_get);
void hda_codec_i915_put(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
dev_dbg(bus->dev, "Turning i915 HDAC power off\n");
snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
}
EXPORT_SYMBOL(hda_codec_i915_put);
int hda_codec_i915_init(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
int ret;
/* i915 exposes a HDA codec for HDMI audio */
ret = snd_hdac_i915_init(bus);
if (ret < 0)
return ret;
hda_codec_i915_get(sdev);
return 0;
}
EXPORT_SYMBOL(hda_codec_i915_init);
int hda_codec_i915_exit(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
int ret;
hda_codec_i915_put(sdev);
ret = snd_hdac_i915_exit(bus);
return ret;
}
EXPORT_SYMBOL(hda_codec_i915_exit);
#endif /* CONFIG_SND_SOC_HDAC_HDMI */
MODULE_LICENSE("Dual BSD/GPL");
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