drivers/dma/dma_mcux_lpc.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2020 NXP
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 /**
  * @brief Common part of DMA drivers for some NXP SoC.
  */
 #include <kernel.h>
 #include <device.h>
 #include <soc.h>
 #include <drivers/dma.h>
 #include <fsl_dma.h>
 #include <fsl_inputmux.h>
 #include <logging/log.h>

 #define DT_DRV_COMPAT nxp_lpc_dma

 LOG_MODULE_REGISTER(dma_mcux_lpc, CONFIG_DMA_LOG_LEVEL);

 struct dma_mcux_lpc_config {
 	DMA_Type *base;
 	uint32_t num_of_channels;
 	void (*irq_config_func)(const struct device *dev);
 };

 struct call_back {
 	dma_transfer_config_t *transferConfig;
 	dma_handle_t dma_handle;
 	const struct device *dev;
 	void *user_data;
 	dma_callback_t dma_callback;
 	enum dma_channel_direction dir;
 	bool busy;
 	uint32_t channel_index;
 };

 struct dma_mcux_lpc_dma_data {
 	struct call_back *data_cb;
 	uint32_t *channel_index;
 	uint32_t num_channels_used;
 };

 #define DEV_CFG(dev) \
 	((const struct dma_mcux_lpc_config *const)(dev)->config)
 #define DEV_DATA(dev) ((struct dma_mcux_lpc_dma_data *)dev->data)
 #define DEV_BASE(dev) ((DMA_Type *)DEV_CFG(dev)->base)

 #define DEV_CHANNEL_DATA(dev, ch)                                              \
 		((struct call_back *)(&(DEV_DATA(dev)->data_cb[ch])))

 #define DEV_DMA_HANDLE(dev, ch)                                               \
 		((dma_handle_t *)(&(DEV_CHANNEL_DATA(dev, ch)->dma_handle)))

 static void nxp_lpc_dma_callback(dma_handle_t *handle, void *param,
 			      bool transferDone, uint32_t intmode)
 {
 	int ret = 1;
 	struct call_back *data = (struct call_back *)param;
 	uint32_t channel = handle->channel;

 	if (transferDone) {
 		data->busy = false;
 		ret = 0;
 	}

 	if (intmode == kDMA_IntError) {
 		DMA_AbortTransfer(handle);
 	}

 	data->dma_callback(data->dev, data->user_data, channel, ret);
 }

 /* Handles DMA interrupts and dispatches to the individual channel */
 static void dma_mcux_lpc_irq_handler(const struct device *dev)
 {
 	DMA_IRQHandle(DEV_BASE(dev));
 /*
  * Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F Store
  * immediate overlapping exception return operation might vector
  * to incorrect interrupt
  */
 #if defined __CORTEX_M && (__CORTEX_M == 4U)
 	__DSB();
 #endif
 }

 /* Configure a channel */
 static int dma_mcux_lpc_configure(const struct device *dev, uint32_t channel,
 				  struct dma_config *config)
 {
 	dma_handle_t *p_handle;
 	struct call_back *data;
 	struct dma_mcux_lpc_dma_data *dma_data = DEV_DATA(dev);
 	struct dma_block_config *block_config = config->head_block;
 	dma_transfer_type_t transfer_type;
 	uint32_t virtual_channel;
 	uint32_t total_dma_channels;

 	if (NULL == dev || NULL == config) {
 		return -EINVAL;
 	}

 	/* Check if have a free slot to store DMA channel data */
 	if (dma_data->num_channels_used > DEV_CFG(dev)->num_of_channels) {
 		LOG_ERR("out of DMA channel %d", channel);
 		return -EINVAL;
 	}

 #if defined FSL_FEATURE_DMA_NUMBER_OF_CHANNELS
 	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELS;
 #else
 	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELSn(DEV_BASE(dev));
 #endif

 	/* Check if the dma channel number is valid */
 	if (channel >= total_dma_channels) {
 		LOG_ERR("invalid DMA channel number %d", channel);
 		return -EINVAL;
 	}

 	if (config->source_data_size != 4U &&
 		config->source_data_size != 2U &&
 		config->source_data_size != 1U) {
 		LOG_ERR("Source unit size error, %d", config->source_data_size);
 		return -EINVAL;
 	}

 	if (config->dest_data_size != 4U &&
 		config->dest_data_size != 2U &&
 		config->dest_data_size != 1U) {
 		LOG_ERR("Dest unit size error, %d", config->dest_data_size);
 		return -EINVAL;
 	}

 	switch (config->channel_direction) {
 	case MEMORY_TO_MEMORY:
 		transfer_type = kDMA_MemoryToMemory;
 		break;
 	case MEMORY_TO_PERIPHERAL:
 		transfer_type = kDMA_MemoryToPeripheral;
 		break;
 	case PERIPHERAL_TO_MEMORY:
 		transfer_type = kDMA_PeripheralToMemory;
 		break;
 	default:
 		LOG_ERR("not support transfer direction");
 		return -EINVAL;
 	}

 	/* If needed, allocate a slot to store dma channel data */
 	if (dma_data->channel_index[channel] == -1) {
 		dma_data->channel_index[channel] = dma_data->num_channels_used;
 		dma_data->num_channels_used++;
 	}

 	/* Get the slot number that has the dma channel data */
 	virtual_channel = dma_data->channel_index[channel];
 	/* dma channel data */
 	p_handle = DEV_DMA_HANDLE(dev, virtual_channel);
 	data = DEV_CHANNEL_DATA(dev, virtual_channel);

 	data->dir = config->channel_direction;

 	if (data->busy) {
 		DMA_AbortTransfer(p_handle);
 	}
 	DMA_CreateHandle(p_handle, DEV_BASE(dev), channel);
 	DMA_SetCallback(p_handle, nxp_lpc_dma_callback, (void *)data);

 	LOG_DBG("channel is %d", p_handle->channel);

 	if (config->source_chaining_en && config->dest_chaining_en) {
 		LOG_DBG("link dma out 0 to channel %d", config->linked_channel);
 		/* Link DMA_OTRIG 0 to channel */
 		INPUTMUX_AttachSignal(INPUTMUX, 0, config->linked_channel);
 	}

 	/* Allocate the transfer config structures if needed */
 	if (data->transferConfig == NULL) {
 		data->transferConfig = k_malloc(CONFIG_DMA_LINK_QUEUE_SIZE *
 						sizeof(dma_transfer_config_t));
 		if (!data->transferConfig) {
 			LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
 			return -ENOMEM;
 		}
 	}

 	if (block_config->source_gather_en || block_config->dest_scatter_en) {
 		if (config->block_count > CONFIG_DMA_LINK_QUEUE_SIZE) {
 			LOG_ERR("please config DMA_LINK_QUEUE_SIZE as %d",
 				config->block_count);
 			return -EINVAL;
 		}
 		int i = 0;
 		dma_transfer_config_t *next_transfer;

 		while (block_config != NULL) {
 			/* Check if this last element in the chain */
 			if (block_config->next_block == NULL) {
 				next_transfer = NULL;
 			} else {
 				next_transfer = &(data->transferConfig[i + 1]);
 			}

 			DMA_PrepareTransfer(
 				&(data->transferConfig[i]),
 				(void *)block_config->source_address,
 				(void *)block_config->dest_address,
 				config->dest_data_size,
 				block_config->block_size, transfer_type,
 				(void *)next_transfer);
 			block_config = block_config->next_block;
 			i++;
 		}

 	} else {
 		/* block_count shall be 1 */
 		DMA_PrepareTransfer(
 			&(data->transferConfig[0]),
 			(void *)block_config->source_address,
 			(void *)block_config->dest_address,
 			config->dest_data_size,
 			block_config->block_size, transfer_type,
 			NULL);
 	}
 	DMA_SubmitTransfer(p_handle, &(data->transferConfig[0]));

 	data->busy = false;
 	if (config->dma_callback) {
 		LOG_DBG("INSTALL call back on channel %d", channel);
 		data->user_data = config->user_data;
 		data->dma_callback = config->dma_callback;
 		data->dev = dev;
 	}

 	return 0;
 }

 static int dma_mcux_lpc_start(const struct device *dev, uint32_t channel)
 {
 	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
 	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

 	LOG_DBG("START TRANSFER");
 	LOG_DBG("DMA CTRL 0x%x", DEV_BASE(dev)->CTRL);
 	data->busy = true;
 	DMA_StartTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
 	return 0;
 }

 static int dma_mcux_lpc_stop(const struct device *dev, uint32_t channel)
 {
 	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
 	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

 	if (!data->busy) {
 		return 0;
 	}
 	DMA_AbortTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
 	data->busy = false;
 	return 0;
 }

 static int dma_mcux_lpc_reload(const struct device *dev, uint32_t channel,
 			       uint32_t src, uint32_t dst, size_t size)
 {
 	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
 	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

 	if (data->busy) {
 		DMA_AbortTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
 	}
 	return 0;
 }

 static int dma_mcux_lpc_get_status(const struct device *dev, uint32_t channel,
 				   struct dma_status *status)
 {
 	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
 	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

 	if (data->busy) {
 		status->busy = true;
 		status->pending_length = DMA_GetRemainingBytes(DEV_BASE(dev), channel);
 	} else {
 		status->busy = false;
 		status->pending_length = 0;
 	}
 	status->dir = data->dir;
 	LOG_DBG("DMA CR 0x%x", DEV_BASE(dev)->CTRL);
 	LOG_DBG("DMA INT 0x%x", DEV_BASE(dev)->INTSTAT);

 	return 0;
 }

 static int dma_mcux_lpc_init(const struct device *dev)
 {
 	struct dma_mcux_lpc_dma_data *data = DEV_DATA(dev);
 	int size_channel_data;
 	int total_dma_channels;

 	/* Array to store DMA channel data */
 	size_channel_data =
 		sizeof(struct call_back) * DEV_CFG(dev)->num_of_channels;
 	data->data_cb = k_malloc(size_channel_data);
 	if (!data->data_cb) {
 		LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
 		return -ENOMEM;
 	}

 	for (int i = 0; i < DEV_CFG(dev)->num_of_channels; i++) {
 		data->data_cb[i].transferConfig = NULL;
 	}

 #if defined FSL_FEATURE_DMA_NUMBER_OF_CHANNELS
 	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELS;
 #else
 	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELSn(DEV_BASE(dev));
 #endif
 	/*
 	 * This array is used to hold the index associated with the array
 	 * holding channel data
 	 */
 	data->channel_index = k_malloc(sizeof(uint32_t) * total_dma_channels);
 	if (!data->channel_index) {
 		LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
 		return -ENOMEM;
 	}

 	/*
 	 * Initialize to -1 to indicate dma channel does not have a slot
 	 * assigned to store dma channel data
 	 */
 	for (int i = 0; i < total_dma_channels; i++) {
 		data->channel_index[i] = -1;
 	}

 	data->num_channels_used = 0;


 	DMA_Init(DEV_BASE(dev));
 	INPUTMUX_Init(INPUTMUX);

 	return 0;
 }

 static const struct dma_driver_api dma_mcux_lpc_api = {
 	.config = dma_mcux_lpc_configure,
 	.start = dma_mcux_lpc_start,
 	.stop = dma_mcux_lpc_stop,
 	.reload = dma_mcux_lpc_reload,
 	.get_status = dma_mcux_lpc_get_status,
 };

 #define DMA_MCUX_LPC_CONFIG_FUNC(n)				\
 	static void dma_mcux_lpc_config_func_##n(const struct device *dev)	\
 	{								\
 		IRQ_CONNECT(DT_INST_IRQN(n),				\
 			    DT_INST_IRQ(n, priority),			\
 			    dma_mcux_lpc_irq_handler, DEVICE_GET(dma_mcux_lpc_##n), 0);\
 									\
 		irq_enable(DT_INST_IRQN(n));				\
 	}
 #define DMA_MCUX_LPC_IRQ_CFG_FUNC_INIT(n)				\
 	.irq_config_func = dma_mcux_lpc_config_func_##n
 #define DMA_MCUX_LPC_INIT_CFG(n)					\
 	DMA_MCUX_LPC_DECLARE_CFG(n,				\
 				       DMA_MCUX_LPC_IRQ_CFG_FUNC_INIT(n))

 #define DMA_MCUX_LPC_DECLARE_CFG(n, IRQ_FUNC_INIT)		\
 static const struct dma_mcux_lpc_config dma_##n##_config = {	\
 	.base = (DMA_Type *)DT_INST_REG_ADDR(n),			\
 	.num_of_channels = DT_INST_PROP(n, dma_channels),			\
 	IRQ_FUNC_INIT							\
 }

 #define DMA_INIT(n) \
 									\
 	static const struct dma_mcux_lpc_config dma_##n##_config;\
 									\
 	static struct dma_mcux_lpc_dma_data dma_data_##n = {	\
 		.data_cb = NULL,					\
 	};								\
 									\
 	DEVICE_AND_API_INIT(dma_mcux_lpc_##n, DT_INST_LABEL(n),	\
 			    &dma_mcux_lpc_init,				\
 			    &dma_data_##n, &dma_##n##_config,\
 			    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,\
 			    &dma_mcux_lpc_api);			\
 									\
 	DMA_MCUX_LPC_CONFIG_FUNC(n)				\
 									\
 	DMA_MCUX_LPC_INIT_CFG(n);

 DT_INST_FOREACH_STATUS_OKAY(DMA_INIT)
	/*
	* Copyright (c) 2020 NXP
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	/**
	* @brief Common part of DMA drivers for some NXP SoC.
	*/
	#include <kernel.h>
	#include <device.h>
	#include <soc.h>
	#include <drivers/dma.h>
	#include <fsl_dma.h>
	#include <fsl_inputmux.h>
	#include <logging/log.h>

	#define DT_DRV_COMPAT nxp_lpc_dma

	LOG_MODULE_REGISTER(dma_mcux_lpc, CONFIG_DMA_LOG_LEVEL);

	struct dma_mcux_lpc_config {
	DMA_Type *base;
	uint32_t num_of_channels;
	void (irq_config_func)(const struct device dev);
	};

	struct call_back {
	dma_transfer_config_t *transferConfig;
	dma_handle_t dma_handle;
	const struct device *dev;
	void *user_data;
	dma_callback_t dma_callback;
	enum dma_channel_direction dir;
	bool busy;
	uint32_t channel_index;
	};

	struct dma_mcux_lpc_dma_data {
	struct call_back *data_cb;
	uint32_t *channel_index;
	uint32_t num_channels_used;
	};

	#define DEV_CFG(dev) \
	((const struct dma_mcux_lpc_config *const)(dev)->config)
	#define DEV_DATA(dev) ((struct dma_mcux_lpc_dma_data *)dev->data)
	#define DEV_BASE(dev) ((DMA_Type *)DEV_CFG(dev)->base)

	#define DEV_CHANNEL_DATA(dev, ch) \
	((struct call_back *)(&(DEV_DATA(dev)->data_cb[ch])))

	#define DEV_DMA_HANDLE(dev, ch) \
	((dma_handle_t *)(&(DEV_CHANNEL_DATA(dev, ch)->dma_handle)))

	static void nxp_lpc_dma_callback(dma_handle_t handle, void param,
	bool transferDone, uint32_t intmode)
	{
	int ret = 1;
	struct call_back data = (struct call_back )param;
	uint32_t channel = handle->channel;

	if (transferDone) {
	data->busy = false;
	ret = 0;
	}

	if (intmode == kDMA_IntError) {
	DMA_AbortTransfer(handle);
	}

	data->dma_callback(data->dev, data->user_data, channel, ret);
	}

	/* Handles DMA interrupts and dispatches to the individual channel */
	static void dma_mcux_lpc_irq_handler(const struct device *dev)
	{
	DMA_IRQHandle(DEV_BASE(dev));
	/*
	* Add for ARM errata 838869, affects Cortex-M4, Cortex-M4F Store
	* immediate overlapping exception return operation might vector
	* to incorrect interrupt
	*/
	#if defined __CORTEX_M && (__CORTEX_M == 4U)
	__DSB();
	#endif
	}

	/* Configure a channel */
	static int dma_mcux_lpc_configure(const struct device *dev, uint32_t channel,
	struct dma_config *config)
	{
	dma_handle_t *p_handle;
	struct call_back *data;
	struct dma_mcux_lpc_dma_data *dma_data = DEV_DATA(dev);
	struct dma_block_config *block_config = config->head_block;
	dma_transfer_type_t transfer_type;
	uint32_t virtual_channel;
	uint32_t total_dma_channels;

	if (NULL == dev \|\| NULL == config) {
	return -EINVAL;
	}

	/* Check if have a free slot to store DMA channel data */
	if (dma_data->num_channels_used > DEV_CFG(dev)->num_of_channels) {
	LOG_ERR("out of DMA channel %d", channel);
	return -EINVAL;
	}

	#if defined FSL_FEATURE_DMA_NUMBER_OF_CHANNELS
	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELS;
	#else
	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELSn(DEV_BASE(dev));
	#endif

	/* Check if the dma channel number is valid */
	if (channel >= total_dma_channels) {
	LOG_ERR("invalid DMA channel number %d", channel);
	return -EINVAL;
	}

	if (config->source_data_size != 4U &&
	config->source_data_size != 2U &&
	config->source_data_size != 1U) {
	LOG_ERR("Source unit size error, %d", config->source_data_size);
	return -EINVAL;
	}

	if (config->dest_data_size != 4U &&
	config->dest_data_size != 2U &&
	config->dest_data_size != 1U) {
	LOG_ERR("Dest unit size error, %d", config->dest_data_size);
	return -EINVAL;
	}

	switch (config->channel_direction) {
	case MEMORY_TO_MEMORY:
	transfer_type = kDMA_MemoryToMemory;
	break;
	case MEMORY_TO_PERIPHERAL:
	transfer_type = kDMA_MemoryToPeripheral;
	break;
	case PERIPHERAL_TO_MEMORY:
	transfer_type = kDMA_PeripheralToMemory;
	break;
	default:
	LOG_ERR("not support transfer direction");
	return -EINVAL;
	}

	/* If needed, allocate a slot to store dma channel data */
	if (dma_data->channel_index[channel] == -1) {
	dma_data->channel_index[channel] = dma_data->num_channels_used;
	dma_data->num_channels_used++;
	}

	/* Get the slot number that has the dma channel data */
	virtual_channel = dma_data->channel_index[channel];
	/* dma channel data */
	p_handle = DEV_DMA_HANDLE(dev, virtual_channel);
	data = DEV_CHANNEL_DATA(dev, virtual_channel);

	data->dir = config->channel_direction;

	if (data->busy) {
	DMA_AbortTransfer(p_handle);
	}
	DMA_CreateHandle(p_handle, DEV_BASE(dev), channel);
	DMA_SetCallback(p_handle, nxp_lpc_dma_callback, (void *)data);

	LOG_DBG("channel is %d", p_handle->channel);

	if (config->source_chaining_en && config->dest_chaining_en) {
	LOG_DBG("link dma out 0 to channel %d", config->linked_channel);
	/* Link DMA_OTRIG 0 to channel */
	INPUTMUX_AttachSignal(INPUTMUX, 0, config->linked_channel);
	}

	/* Allocate the transfer config structures if needed */
	if (data->transferConfig == NULL) {
	data->transferConfig = k_malloc(CONFIG_DMA_LINK_QUEUE_SIZE *
	sizeof(dma_transfer_config_t));
	if (!data->transferConfig) {
	LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
	return -ENOMEM;
	}
	}

	if (block_config->source_gather_en \|\| block_config->dest_scatter_en) {
	if (config->block_count > CONFIG_DMA_LINK_QUEUE_SIZE) {
	LOG_ERR("please config DMA_LINK_QUEUE_SIZE as %d",
	config->block_count);
	return -EINVAL;
	}
	int i = 0;
	dma_transfer_config_t *next_transfer;

	while (block_config != NULL) {
	/* Check if this last element in the chain */
	if (block_config->next_block == NULL) {
	next_transfer = NULL;
	} else {
	next_transfer = &(data->transferConfig[i + 1]);
	}

	DMA_PrepareTransfer(
	&(data->transferConfig[i]),
	(void *)block_config->source_address,
	(void *)block_config->dest_address,
	config->dest_data_size,
	block_config->block_size, transfer_type,
	(void *)next_transfer);
	block_config = block_config->next_block;
	i++;
	}

	} else {
	/* block_count shall be 1 */
	DMA_PrepareTransfer(
	&(data->transferConfig[0]),
	(void *)block_config->source_address,
	(void *)block_config->dest_address,
	config->dest_data_size,
	block_config->block_size, transfer_type,
	NULL);
	}
	DMA_SubmitTransfer(p_handle, &(data->transferConfig[0]));

	data->busy = false;
	if (config->dma_callback) {
	LOG_DBG("INSTALL call back on channel %d", channel);
	data->user_data = config->user_data;
	data->dma_callback = config->dma_callback;
	data->dev = dev;
	}

	return 0;
	}

	static int dma_mcux_lpc_start(const struct device *dev, uint32_t channel)
	{
	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

	LOG_DBG("START TRANSFER");
	LOG_DBG("DMA CTRL 0x%x", DEV_BASE(dev)->CTRL);
	data->busy = true;
	DMA_StartTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
	return 0;
	}

	static int dma_mcux_lpc_stop(const struct device *dev, uint32_t channel)
	{
	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

	if (!data->busy) {
	return 0;
	}
	DMA_AbortTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
	data->busy = false;
	return 0;
	}

	static int dma_mcux_lpc_reload(const struct device *dev, uint32_t channel,
	uint32_t src, uint32_t dst, size_t size)
	{
	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

	if (data->busy) {
	DMA_AbortTransfer(DEV_DMA_HANDLE(dev, virtual_channel));
	}
	return 0;
	}

	static int dma_mcux_lpc_get_status(const struct device *dev, uint32_t channel,
	struct dma_status *status)
	{
	uint32_t virtual_channel = DEV_DATA(dev)->channel_index[channel];
	struct call_back *data = DEV_CHANNEL_DATA(dev, virtual_channel);

	if (data->busy) {
	status->busy = true;
	status->pending_length = DMA_GetRemainingBytes(DEV_BASE(dev), channel);
	} else {
	status->busy = false;
	status->pending_length = 0;
	}
	status->dir = data->dir;
	LOG_DBG("DMA CR 0x%x", DEV_BASE(dev)->CTRL);
	LOG_DBG("DMA INT 0x%x", DEV_BASE(dev)->INTSTAT);

	return 0;
	}

	static int dma_mcux_lpc_init(const struct device *dev)
	{
	struct dma_mcux_lpc_dma_data *data = DEV_DATA(dev);
	int size_channel_data;
	int total_dma_channels;

	/* Array to store DMA channel data */
	size_channel_data =
	sizeof(struct call_back) * DEV_CFG(dev)->num_of_channels;
	data->data_cb = k_malloc(size_channel_data);
	if (!data->data_cb) {
	LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
	return -ENOMEM;
	}

	for (int i = 0; i < DEV_CFG(dev)->num_of_channels; i++) {
	data->data_cb[i].transferConfig = NULL;
	}

	#if defined FSL_FEATURE_DMA_NUMBER_OF_CHANNELS
	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELS;
	#else
	total_dma_channels = FSL_FEATURE_DMA_NUMBER_OF_CHANNELSn(DEV_BASE(dev));
	#endif
	/*
	* This array is used to hold the index associated with the array
	* holding channel data
	*/
	data->channel_index = k_malloc(sizeof(uint32_t) * total_dma_channels);
	if (!data->channel_index) {
	LOG_ERR("HEAP_MEM_POOL_SIZE is too small");
	return -ENOMEM;
	}

	/*
	* Initialize to -1 to indicate dma channel does not have a slot
	* assigned to store dma channel data
	*/
	for (int i = 0; i < total_dma_channels; i++) {
	data->channel_index[i] = -1;
	}

	data->num_channels_used = 0;


	DMA_Init(DEV_BASE(dev));
	INPUTMUX_Init(INPUTMUX);

	return 0;
	}

	static const struct dma_driver_api dma_mcux_lpc_api = {
	.config = dma_mcux_lpc_configure,
	.start = dma_mcux_lpc_start,
	.stop = dma_mcux_lpc_stop,
	.reload = dma_mcux_lpc_reload,
	.get_status = dma_mcux_lpc_get_status,
	};

	#define DMA_MCUX_LPC_CONFIG_FUNC(n) \
	static void dma_mcux_lpc_config_func_##n(const struct device *dev) \
	{ \
	IRQ_CONNECT(DT_INST_IRQN(n), \
	DT_INST_IRQ(n, priority), \
	dma_mcux_lpc_irq_handler, DEVICE_GET(dma_mcux_lpc_##n), 0);\
	\
	irq_enable(DT_INST_IRQN(n)); \
	}
	#define DMA_MCUX_LPC_IRQ_CFG_FUNC_INIT(n) \
	.irq_config_func = dma_mcux_lpc_config_func_##n
	#define DMA_MCUX_LPC_INIT_CFG(n) \
	DMA_MCUX_LPC_DECLARE_CFG(n, \
	DMA_MCUX_LPC_IRQ_CFG_FUNC_INIT(n))

	#define DMA_MCUX_LPC_DECLARE_CFG(n, IRQ_FUNC_INIT) \
	static const struct dma_mcux_lpc_config dma_##n##_config = { \
	.base = (DMA_Type *)DT_INST_REG_ADDR(n), \
	.num_of_channels = DT_INST_PROP(n, dma_channels), \
	IRQ_FUNC_INIT \
	}

	#define DMA_INIT(n) \
	\
	static const struct dma_mcux_lpc_config dma_##n##_config;\
	\
	static struct dma_mcux_lpc_dma_data dma_data_##n = { \
	.data_cb = NULL, \
	}; \
	\
	DEVICE_AND_API_INIT(dma_mcux_lpc_##n, DT_INST_LABEL(n), \
	&dma_mcux_lpc_init, \
	&dma_data_##n, &dma_##n##_config,\
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,\
	&dma_mcux_lpc_api); \
	\
	DMA_MCUX_LPC_CONFIG_FUNC(n) \
	\
	DMA_MCUX_LPC_INIT_CFG(n);

	DT_INST_FOREACH_STATUS_OKAY(DMA_INIT)