// 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_register.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 */
static int hda_codec_load_module(struct hda_codec *codec)
{
#ifdef MODULE
        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);
#endif
        return device_attach(hda_codec_dev(codec));
}

/* enable controller wake up event for all codecs with jack connectors */
void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev)
{
        struct hda_bus *hbus = sof_to_hbus(sdev);
        struct hdac_bus *bus = sof_to_bus(sdev);
        struct hda_codec *codec;
        unsigned int mask = 0;

        list_for_each_codec(codec, hbus)
                if (codec->jacktbl.used)
                        mask |= BIT(codec->core.addr);

        snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, mask);
}

/* check jack status after resuming from suspend mode */
void hda_codec_jack_check(struct snd_sof_dev *sdev)
{
        struct hda_bus *hbus = sof_to_hbus(sdev);
        struct hdac_bus *bus = sof_to_bus(sdev);
        struct hda_codec *codec;

        /* disable controller Wake Up event*/
        snd_hdac_chip_updatew(bus, WAKEEN, STATESTS_INT_MASK, 0);

        list_for_each_codec(codec, hbus)
                /*
                 * Wake up all jack-detecting codecs regardless whether an event
                 * has been recorded in STATESTS
                 */
                if (codec->jacktbl.used)
                        schedule_delayed_work(&codec->jackpoll_work,
                                              codec->jackpoll_interval);
}
#else
void hda_codec_jack_wake_enable(struct snd_sof_dev *sdev) {}
void hda_codec_jack_check(struct snd_sof_dev *sdev) {}
#endif /* CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC */
EXPORT_SYMBOL(hda_codec_jack_wake_enable);
EXPORT_SYMBOL(hda_codec_jack_check);

/* probe individual codec */
static int hda_codec_probe(struct snd_sof_dev *sdev, int address)
{
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_AUDIO_CODEC)
        struct hdac_hda_priv *hda_priv;
        struct snd_soc_acpi_mach_params *mach_params = NULL;
        struct snd_sof_pdata *pdata = sdev->pdata;
#endif
        struct hda_bus *hbus = sof_to_hbus(sdev);
        struct hdac_device *hdev;
        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)
        hda_priv = devm_kzalloc(sdev->dev, 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;

        if (pdata->machine)
                mach_params = (struct snd_soc_acpi_mach_params *)
                        &pdata->machine->mach_params;

        if ((resp & 0xFFFF0000) == IDISP_VID_INTEL)
                hda_priv->need_display_power = true;

        /*
         * if common HDMI codec driver is not used, codec load
         * is skipped here and hdac_hdmi is used instead
         */
        if ((mach_params && mach_params->common_hdmi_codec_drv) ||
            (resp & 0xFFFF0000) != IDISP_VID_INTEL) {
                hdev->type = HDA_DEV_LEGACY;
                ret = hda_codec_load_module(&hda_priv->codec);
                /*
                 * handle ret==0 (no driver bound) as an error, but pass
                 * other return codes without modification
                 */
                if (ret == 0)
                        ret = -ENOENT;
        }

        return ret;
#else
        hdev = devm_kzalloc(sdev->dev, 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_HDA_CODEC_HDMI) || \
        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

MODULE_LICENSE("Dual BSD/GPL");