stm32_gpdma.c File Reference

Implementation of STM32 GPDMA functionality. More...

#include "stm32_dma.h"
#include "no_os_error.h"
#include "no_os_alloc.h"
#include "stm32_irq.h"

Include dependency graph for stm32_gpdma.c:

Classes
struct	stm32_dma_ch_priv_data

Functions
int	stm32_gpdma_config_xfer (struct no_os_dma_ch *channel, struct no_os_dma_xfer_desc *xfer)
	Configure a General Purpose DMA channel for a transfer.
int	stm32_gpdma_init (struct no_os_dma_desc **desc, const struct no_os_dma_init_param *param)
	Initialize a General Purpose DMA controller.
int	stm32_gpdma_xfer_start (struct no_os_dma_desc *desc, struct no_os_dma_ch *chan)
	Start a General Purpose DMA transfer for a specific channel.
int	stm32_gpdma_xfer_abort (struct no_os_dma_desc *desc, struct no_os_dma_ch *chan)
	Disable a General Purpose DMA channel.
int	stm32_gpdma_remove (struct no_os_dma_desc *desc)
	Free the resources allocated for a General Purpose DMA descriptor.

Variables
const struct no_os_dma_platform_ops	stm32_gpdma_ops
	stm32 platform specific General Purpose DMA platform ops structure

Detailed Description

Implementation of STM32 GPDMA functionality.

Author

Swaroop P Kukkillaya (swaro.nosp@m.op.k.nosp@m.ukkil.nosp@m.laya.nosp@m.@anal.nosp@m.og.c.nosp@m.om)

Copyright 2025(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Function Documentation

stm32_gpdma_config_xfer()

int stm32_gpdma_config_xfer	(	struct no_os_dma_ch *	channel,
		struct no_os_dma_xfer_desc *	xfer )

Configure a General Purpose DMA channel for a transfer.

Parameters

channel	- The GPDMA channel descriptor.
xfer	- Descriptor for the transfer.

Returns

0 in case of success, negative error codes otherwise

stm32_gpdma_init()

int stm32_gpdma_init	(	struct no_os_dma_desc **	desc,
		const struct no_os_dma_init_param *	param )

Initialize a General Purpose DMA controller.

Parameters

desc	- Descriptor to be initialized.
param	- Initialization parameter for the decriptor.

Returns

0 in case of success -ENOMEM if there is not enough free memory

stm32_gpdma_remove()

int stm32_gpdma_remove

(

struct no_os_dma_desc *

desc

)

Free the resources allocated for a General Purpose DMA descriptor.

Parameters

desc	- Descriptor to be freed.

Returns

0 in case of success, negative error code otherwise

stm32_gpdma_xfer_abort()

int stm32_gpdma_xfer_abort	(	struct no_os_dma_desc *	desc,
		struct no_os_dma_ch *	chan )

Disable a General Purpose DMA channel.

Parameters

desc	- Descriptor for the GPDMA controller.
chan	- The GPDMA Channel

Returns

0 in case of success, negative error codes otherwise

stm32_gpdma_xfer_start()

int stm32_gpdma_xfer_start	(	struct no_os_dma_desc *	desc,
		struct no_os_dma_ch *	chan )

Start a General Purpose DMA transfer for a specific channel.

Parameters

desc	- Descriptor for the GPDMA controller.
chan	- The GPDMA Channel

Returns

0 in case of success, negative error codes otherwise

Variable Documentation

stm32_gpdma_ops

const struct no_os_dma_platform_ops stm32_gpdma_ops

Initial value:

= {
    .dma_init = stm32_gpdma_init,
    .dma_config_xfer = stm32_gpdma_config_xfer,
    .dma_xfer_start = stm32_gpdma_xfer_start,
    .dma_xfer_abort = stm32_gpdma_xfer_abort,
    .dma_remove = stm32_gpdma_remove
}

stm32 platform specific General Purpose DMA platform ops structure