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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Copyright 2019 NXP
- *
- */
- #ifndef _FSL_ASRC_COMMON_H
- #define _FSL_ASRC_COMMON_H
- /* directions */
- #define IN 0
- #define OUT 1
- enum asrc_pair_index {
- ASRC_INVALID_PAIR = -1,
- ASRC_PAIR_A = 0,
- ASRC_PAIR_B = 1,
- ASRC_PAIR_C = 2,
- ASRC_PAIR_D = 3,
- };
- #define PAIR_CTX_NUM 0x4
- /**
- * 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 {
- struct fsl_asrc *asrc;
- unsigned int error;
- enum asrc_pair_index index;
- unsigned int channels;
- struct dma_async_tx_descriptor *desc[2];
- struct dma_chan *dma_chan[2];
- struct imx_dma_data dma_data;
- unsigned int pos;
- bool req_dma_chan;
- void *private;
- };
- /**
- * 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 {
- struct snd_dmaengine_dai_dma_data dma_params_rx;
- struct snd_dmaengine_dai_dma_data dma_params_tx;
- struct platform_device *pdev;
- struct regmap *regmap;
- unsigned long paddr;
- struct clk *mem_clk;
- struct clk *ipg_clk;
- struct clk *spba_clk;
- spinlock_t lock; /* spin lock for resource protection */
- struct fsl_asrc_pair *pair[PAIR_CTX_NUM];
- unsigned int channel_avail;
- int asrc_rate;
- snd_pcm_format_t asrc_format;
- bool use_edma;
- struct dma_chan *(*get_dma_channel)(struct fsl_asrc_pair *pair, bool dir);
- int (*request_pair)(int channels, struct fsl_asrc_pair *pair);
- void (*release_pair)(struct fsl_asrc_pair *pair);
- int (*get_fifo_addr)(u8 dir, enum asrc_pair_index index);
- size_t pair_priv_size;
- void *private;
- };
- #define DRV_NAME "fsl-asrc-dai"
- extern struct snd_soc_component_driver fsl_asrc_component;
- #endif /* _FSL_ASRC_COMMON_H */
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