// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019 MediaTek Inc.
 * Author: Michael Hsiao <michael.hsiao@mediatek.com>
 */

/*******************************************************************************
 *
 * Filename:
 * ---------
 *   mtk_pcm_capture2.c
 *
 * Project:
 * --------
 *   Audio Driver Kernel Function
 *
 * Description:
 * ------------
 *   Audio Ul1 data1 uplink
 *
 * Author:
 * -------
 * Chipeng Chang
 *
 *------------------------------------------------------------------------------
 *
 ******************************************************************************
 */

/*****************************************************************************
 *                     C O M P I L E R   F L A G S
 *****************************************************************************/

/*****************************************************************************
 *                E X T E R N A L   R E F E R E N C E S
 *****************************************************************************/

#include "mtk-auddrv-afe.h"
#include "mtk-auddrv-ana.h"
#include "mtk-auddrv-clk.h"
#include "mtk-auddrv-common.h"
#include "mtk-auddrv-def.h"
#include "mtk-auddrv-kernel.h"
#include "mtk-soc-afe-control.h"
#include "mtk-soc-pcm-common.h"
#include "mtk-soc-pcm-platform.h"
#include <linux/dma-mapping.h>

/* information about */
struct afe_mem_control_t *VUL2_Control_context;
static struct snd_dma_buffer *Capture2_dma_buf;
static bool mPrepareDone;

/*
 *    function implementation
 */
static int mtk_capture2_probe(struct platform_device *pdev);
static int mtk_capture2_pcm_close(struct snd_pcm_substream *substream);
static int mtk_afe_capture2_component_probe(struct snd_soc_component *component);

static struct snd_pcm_hardware mtk_capture2_hardware = {
	.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
		 SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
	.formats = SND_SOC_ADV_MT_FMTS,
	.rates = SOC_HIGH_USE_RATE,
	.rate_min = SOC_HIGH_USE_RATE_MIN,
	.rate_max = SOC_HIGH_USE_RATE_MAX,
	.channels_min = SOC_HIGH_USE_CHANNELS_MIN,
	.channels_max = SOC_HIGH_USE_CHANNELS_MAX,
	.buffer_bytes_max = UL2_MAX_BUFFER_SIZE,
	.period_bytes_max = UL2_MAX_BUFFER_SIZE,
	.periods_min = UL2_MIN_PERIOD_SIZE,
	.periods_max = UL2_MAX_PERIOD_SIZE,
	.fifo_size = 0,
};

static int mtk_capture2_pcm_prepare(struct snd_pcm_substream *substream)
{
	pr_debug("%s, format = %d, rate = %d\n", __func__,
		substream->runtime->format, substream->runtime->rate);

	if (mPrepareDone == false) {
		SetMemifSubStream(Soc_Aud_Digital_Block_MEM_VUL_DATA2,
				  substream);

		if (substream->runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
		    substream->runtime->format == SNDRV_PCM_FORMAT_U32_LE) {
			SetMemIfFetchFormatPerSample(
				Soc_Aud_Digital_Block_MEM_VUL_DATA2,
				AFE_WLEN_32_BIT_ALIGN_8BIT_0_24BIT_DATA);
			SetConnectionFormat(OUTPUT_DATA_FORMAT_24BIT,
					    Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
		} else {
			SetMemIfFetchFormatPerSample(
				Soc_Aud_Digital_Block_MEM_VUL_DATA2,
				AFE_WLEN_16_BIT);
			SetConnectionFormat(OUTPUT_DATA_FORMAT_16BIT,
					    Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
		}

		if (substream->runtime->channels > 2) {
			pr_debug("%s channel(%d) open 4-ch path\n", __func__,
				substream->runtime->channels);
			SetIntfConnection(Soc_Aud_InterCon_Connection,
					  Soc_Aud_AFE_IO_Block_ADDA_UL,
					  Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
			SetIntfConnection(Soc_Aud_InterCon_Connection,
					  Soc_Aud_AFE_IO_Block_ADDA_UL2,
					  Soc_Aud_AFE_IO_Block_MEM_VUL);

			if (GetMemoryPathEnable(
				    Soc_Aud_Digital_Block_ADDA_UL) == false) {
				SetMemoryPathEnable(
					Soc_Aud_Digital_Block_ADDA_UL, true);
				set_adc_in(substream->runtime->rate);
				set_adc_enable(true);
			} else {
				SetMemoryPathEnable(
					Soc_Aud_Digital_Block_ADDA_UL, true);
			}
		} else {
			SetIntfConnection(Soc_Aud_InterCon_Connection,
					  Soc_Aud_AFE_IO_Block_ADDA_UL2,
					  Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
		}

		if (GetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL2) ==
		    false) {
			SetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL2,
					    true);
			set_adc2_in(substream->runtime->rate);
			set_adc2_enable(true);
		} else {
			SetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL2,
					    true);
		}

		mPrepareDone = true;
	}

	return 0;
}

static int mtk_capture2_alsa_stop(struct snd_pcm_substream *substream)
{
	irq_remove_user(
		substream,
		irq_request_number(Soc_Aud_Digital_Block_MEM_VUL_DATA2));

	SetMemoryPathEnable(Soc_Aud_Digital_Block_MEM_VUL_DATA2, false);

	ClearMemBlock(Soc_Aud_Digital_Block_MEM_VUL_DATA2);
	return 0;
}

static snd_pcm_uframes_t
mtk_capture2_pcm_pointer(struct snd_pcm_substream *substream)
{
	return get_mem_frame_index(substream, VUL2_Control_context,
				   Soc_Aud_Digital_Block_MEM_VUL_DATA2);
}

static int mtk_capture2_pcm_hw_params(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *hw_params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_dma_buffer *dma_buf = &substream->dma_buffer;
	int ret = 0;

	dma_buf->dev.type = SNDRV_DMA_TYPE_DEV;
	dma_buf->dev.dev = substream->pcm->card->dev;
	dma_buf->private_data = NULL;

	if (Capture2_dma_buf->area) {
		runtime->dma_bytes = Capture2_dma_buf->bytes;
		runtime->dma_area = Capture2_dma_buf->area;
		runtime->dma_addr = Capture2_dma_buf->addr;
		runtime->buffer_size = Capture2_dma_buf->bytes;
		SetHighAddr(Soc_Aud_Digital_Block_MEM_VUL_DATA2, true,
			    runtime->dma_addr);
	} else {
		ret = snd_pcm_lib_malloc_pages(substream,
					       params_buffer_bytes(hw_params));
	}

	set_mem_block(substream, hw_params, VUL2_Control_context,
		      Soc_Aud_Digital_Block_MEM_VUL_DATA2);

	AudDrv_Emi_Clk_On();

	return ret;
}

static int mtk_capture2_pcm_hw_free(struct snd_pcm_substream *substream)
{
	AudDrv_Emi_Clk_Off();

	if (Capture2_dma_buf->area)
		return 0;
	else
		return snd_pcm_lib_free_pages(substream);
}

static struct snd_pcm_hw_constraint_list constraints_sample_rates = {
	.count = ARRAY_SIZE(soc_high_supported_sample_rates),
	.list = soc_high_supported_sample_rates,
};

static struct snd_pcm_hw_constraint_list constraints_channels = {
	.count = ARRAY_SIZE(soc_multiple_supported_channels),
	.list = soc_multiple_supported_channels,
};

static int mtk_capture2_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

	AudDrv_Clk_On();

	pr_debug("%s\n", __func__);
	VUL2_Control_context =
		Get_Mem_ControlT(Soc_Aud_Digital_Block_MEM_VUL_DATA2);

	runtime->hw = mtk_capture2_hardware;
	memcpy((void *)(&(runtime->hw)), (void *)&mtk_capture2_hardware,
	       sizeof(struct snd_pcm_hardware));
	pr_debug("runtime->hw->rates = 0x%x\n ", runtime->hw.rates);

	ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
					 &constraints_sample_rates);
	ret = snd_pcm_hw_constraint_list(
		runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, &constraints_channels);
	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);

	if (ret < 0) {
		pr_warn("capture2_pcm_close\n");
		mtk_capture2_pcm_close(substream);
		return ret;
	}
	return 0;
}

static int mtk_capture2_pcm_close(struct snd_pcm_substream *substream)
{
	pr_debug("%s\n", __func__);
	if (mPrepareDone == true) {
		SetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL2, false);
		if (GetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL2) ==
		    false)
			set_adc2_enable(false);

		/* here to turn off digital part */
		if (substream->runtime->channels > 2) {
			SetIntfConnection(Soc_Aud_InterCon_DisConnect,
					  Soc_Aud_AFE_IO_Block_ADDA_UL,
					  Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
			SetIntfConnection(Soc_Aud_InterCon_DisConnect,
					  Soc_Aud_AFE_IO_Block_ADDA_UL2,
					  Soc_Aud_AFE_IO_Block_MEM_VUL);

			SetMemoryPathEnable(Soc_Aud_Digital_Block_ADDA_UL,
					    false);
			if (GetMemoryPathEnable(
				    Soc_Aud_Digital_Block_ADDA_UL) == false)
				set_adc_enable(false);
		} else {
			SetIntfConnection(Soc_Aud_InterCon_DisConnect,
					  Soc_Aud_AFE_IO_Block_ADDA_UL2,
					  Soc_Aud_AFE_IO_Block_MEM_VUL_DATA2);
		}

		RemoveMemifSubStream(Soc_Aud_Digital_Block_MEM_VUL_DATA2,
				     substream);

		EnableAfe(false);
		mPrepareDone = false;
	}
	AudDrv_Clk_Off();
	return 0;
}

static int mtk_capture2_alsa_start(struct snd_pcm_substream *substream)
{
	pr_debug("%s\n", __func__);

	/* here to set interrupt */
	irq_add_user(substream,
		     irq_request_number(Soc_Aud_Digital_Block_MEM_VUL_DATA2),
		     substream->runtime->rate, substream->runtime->period_size);

	SetSampleRate(Soc_Aud_Digital_Block_MEM_VUL_DATA2,
		      substream->runtime->rate);
	SetChannels(Soc_Aud_Digital_Block_MEM_VUL_DATA2,
		    substream->runtime->channels);
	SetMemoryPathEnable(Soc_Aud_Digital_Block_MEM_VUL_DATA2, true);

	EnableAfe(true);
	return 0;
}

static int mtk_capture2_pcm_trigger(struct snd_pcm_substream *substream,
				    int cmd)
{
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
		return mtk_capture2_alsa_start(substream);
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
		return mtk_capture2_alsa_stop(substream);
	}
	return -EINVAL;
}

static int mtk_capture2_pcm_copy(struct snd_pcm_substream *substream,
				 int channel, unsigned long pos,
				 void __user *dst, unsigned long count)
{
	return mtk_memblk_copy(substream, channel, pos, dst, count,
			       VUL2_Control_context,
			       Soc_Aud_Digital_Block_MEM_VUL_DATA2);
}

static int mtk_capture2_pcm_silence(struct snd_pcm_substream *substream,
				    int channel,
				    unsigned long pos,
				    unsigned long bytes)
{
	pr_debug("dummy_pcm_silence\n");
	return 0; /* do nothing */
}

static void *dummy_page[2];

static struct page *mtk_capture2_pcm_page(struct snd_pcm_substream *substream,
					  unsigned long offset)
{
	return virt_to_page(dummy_page[substream->stream]); /* the same page */
}

static struct snd_pcm_ops mtk_afe_capture2_ops = {
	.open = mtk_capture2_pcm_open,
	.close = mtk_capture2_pcm_close,
	.ioctl = snd_pcm_lib_ioctl,
	.hw_params = mtk_capture2_pcm_hw_params,
	.hw_free = mtk_capture2_pcm_hw_free,
	.prepare = mtk_capture2_pcm_prepare,
	.trigger = mtk_capture2_pcm_trigger,
	.pointer = mtk_capture2_pcm_pointer,
	.copy_user = mtk_capture2_pcm_copy,
	.fill_silence = mtk_capture2_pcm_silence,
	.page = mtk_capture2_pcm_page,
};

static struct snd_soc_component_driver mtk_soc_component = {
	.name = AFE_PCM_NAME,
	.ops = &mtk_afe_capture2_ops,
	.probe = mtk_afe_capture2_component_probe,
};

static int mtk_capture2_probe(struct platform_device *pdev)
{
	pr_debug("mtk_capture2_probe\n");

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	if (pdev->dev.dma_mask == NULL)
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;

	if (pdev->dev.of_node)
		dev_set_name(&pdev->dev, "%s", MT_SOC_UL2_PCM);
	pdev->name = pdev->dev.kobj.name;

	pr_debug("%s: dev name %s\n", __func__, dev_name(&pdev->dev));
	return snd_soc_register_component(&pdev->dev,
					  &mtk_soc_component,
					  NULL,
					  0);
}

static int mtk_afe_capture2_component_probe(struct snd_soc_component *component)
{
	pr_debug("mtk_afe_capture2_component_probe\n");
	AudDrv_Allocate_mem_Buffer(component->dev,
				   Soc_Aud_Digital_Block_MEM_VUL_DATA2,
				   UL2_MAX_BUFFER_SIZE);
	Capture2_dma_buf = Get_Mem_Buffer(Soc_Aud_Digital_Block_MEM_VUL_DATA2);
	return 0;
}

static int mtk_capture2_remove(struct platform_device *pdev)
{
	snd_soc_unregister_component(&pdev->dev);
	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id mt_soc_pcm_capture2_of_ids[] = {
	{
		.compatible = "mediatek,mt_soc_pcm_capture2",
	},
	{} };
#endif

static struct platform_driver mtk_afe_capture2_driver = {
	.driver = {

			.name = MT_SOC_UL2_PCM,
			.owner = THIS_MODULE,
#ifdef CONFIG_OF
			.of_match_table = mt_soc_pcm_capture2_of_ids,
#endif
		},
	.probe = mtk_capture2_probe,
	.remove = mtk_capture2_remove,
};

#ifndef CONFIG_OF
static struct platform_device *soc_mtkafe_capture2_dev;
#endif

static int __init mtk_soc_capture2_platform_init(void)
{
	int ret = 0;

	pr_debug("%s\n", __func__);
#ifndef CONFIG_OF
	soc_mtkafe_capture2_dev = platform_device_alloc(MT_SOC_UL2_PCM, -1);
	if (!soc_mtkafe_capture2_dev)
		return -ENOMEM;

	ret = platform_device_add(soc_mtkafe_capture2_dev);
	if (ret != 0) {
		platform_device_put(soc_mtkafe_capture2_dev);
		return ret;
	}
#endif

	ret = platform_driver_register(&mtk_afe_capture2_driver);
	return ret;
}
module_init(mtk_soc_capture2_platform_init);

static void __exit mtk_soc_capture2_platform_exit(void)
{

	platform_driver_unregister(&mtk_afe_capture2_driver);
}
module_exit(mtk_soc_capture2_platform_exit);

MODULE_DESCRIPTION("AFE Capture2 module platform driver");
MODULE_LICENSE("GPL");