ASoC: SOF: Intel: Add support for HDAudio codecs

// 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");