linux/sound/soc/fsl/fsl_asrc_common.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright 2019 NXP
 *
 */

#ifndef _FSL_ASRC_COMMON_H
#define _FSL_ASRC_COMMON_H

/* directions */
#define IN …
#define OUT …

enum asrc_pair_index { … };

#define PAIR_CTX_NUM …

/**
 * fsl_asrc_pair: ASRC Pair common data
 *
 * @asrc: pointer to its parent module
 * @error: error record
 * @index: pair index (ASRC_PAIR_A, ASRC_PAIR_B, ASRC_PAIR_C)
 * @channels: occupied channel number
 * @desc: input and output dma descriptors
 * @dma_chan: inputer and output DMA channels
 * @dma_data: private dma data
 * @pos: hardware pointer position
 * @req_dma_chan: flag to release dev_to_dev chan
 * @private: pair private area
 */
struct fsl_asrc_pair { … };

/**
 * fsl_asrc: ASRC common data
 *
 * @dma_params_rx: DMA parameters for receive channel
 * @dma_params_tx: DMA parameters for transmit channel
 * @pdev: platform device pointer
 * @regmap: regmap handler
 * @paddr: physical address to the base address of registers
 * @mem_clk: clock source to access register
 * @ipg_clk: clock source to drive peripheral
 * @spba_clk: SPBA clock (optional, depending on SoC design)
 * @lock: spin lock for resource protection
 * @pair: pair pointers
 * @channel_avail: non-occupied channel numbers
 * @asrc_rate: default sample rate for ASoC Back-Ends
 * @asrc_format: default sample format for ASoC Back-Ends
 * @use_edma: edma is used
 * @get_dma_channel: function pointer
 * @request_pair: function pointer
 * @release_pair: function pointer
 * @get_fifo_addr: function pointer
 * @pair_priv_size: size of pair private struct.
 * @private: private data structure
 */
struct fsl_asrc { … };

#define DRV_NAME …
extern struct snd_soc_component_driver fsl_asrc_component;

#endif /* _FSL_ASRC_COMMON_H */