// SPDX-License-Identifier: (GPL-2.0-only 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) 2021 Advanced Micro Devices, Inc.
//
// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>

/*
 * PCM interface for generic AMD audio ACP DSP block
 */
#include <sound/pcm_params.h>

#include "../ops.h"
#include "acp.h"
#include "acp-dsp-offset.h"

int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
                      struct snd_pcm_hw_params *params,
                      struct snd_sof_platform_stream_params *platform_params)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct acp_dsp_stream *stream = runtime->private_data;
        unsigned int buf_offset, index;
        u32 size;
        int ret;

        size = runtime->dma_bytes;
        stream->num_pages = PFN_UP(runtime->dma_bytes);
        stream->dmab = substream->runtime->dma_buffer_p;

        ret = acp_dsp_stream_config(sdev, stream);
        if (ret < 0) {
                dev_err(sdev->dev, "stream configuration failed\n");
                return ret;
        }

        platform_params->use_phy_address = true;
        platform_params->phy_addr = stream->reg_offset;
        platform_params->stream_tag = stream->stream_tag;
        platform_params->cont_update_posn = 1;

        /* write buffer size of stream in scratch memory */

        buf_offset = sdev->debug_box.offset +
                     offsetof(struct scratch_reg_conf, buf_size);
        index = stream->stream_tag - 1;
        buf_offset = buf_offset + index * 4;

        snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SCRATCH_REG_0 + buf_offset, size);

        return 0;
}
EXPORT_SYMBOL_NS(acp_pcm_hw_params, "SND_SOC_SOF_AMD_COMMON");

int acp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
{
        struct acp_dsp_stream *stream;

        stream = acp_dsp_stream_get(sdev, 0);
        if (!stream)
                return -ENODEV;

        substream->runtime->private_data = stream;
        stream->substream = substream;

        return 0;
}
EXPORT_SYMBOL_NS(acp_pcm_open, "SND_SOC_SOF_AMD_COMMON");

int acp_pcm_close(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream)
{
        struct acp_dsp_stream *stream;

        stream = substream->runtime->private_data;
        if (!stream) {
                dev_err(sdev->dev, "No open stream\n");
                return -EINVAL;
        }

        stream->substream = NULL;
        substream->runtime->private_data = NULL;

        return acp_dsp_stream_put(sdev, stream);
}
EXPORT_SYMBOL_NS(acp_pcm_close, "SND_SOC_SOF_AMD_COMMON");

snd_pcm_uframes_t acp_pcm_pointer(struct snd_sof_dev *sdev,
                                  struct snd_pcm_substream *substream)
{
        struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
        struct snd_soc_component *scomp = sdev->component;
        struct snd_sof_pcm_stream *stream;
        struct sof_ipc_stream_posn posn;
        struct snd_sof_pcm *spcm;
        snd_pcm_uframes_t pos;
        int ret;

        spcm = snd_sof_find_spcm_dai(scomp, rtd);
        if (!spcm) {
                dev_warn_ratelimited(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
                                     rtd->dai_link->id);
                return 0;
        }

        stream = &spcm->stream[substream->stream];
        ret = snd_sof_ipc_msg_data(sdev, stream, &posn, sizeof(posn));
        if (ret < 0) {
                dev_warn(sdev->dev, "failed to read stream position: %d\n", ret);
                return 0;
        }

        memcpy(&stream->posn, &posn, sizeof(posn));
        pos = spcm->stream[substream->stream].posn.host_posn;
        pos = bytes_to_frames(substream->runtime, pos);

        return pos;
}
EXPORT_SYMBOL_NS(acp_pcm_pointer, "SND_SOC_SOF_AMD_COMMON");