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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _FSL_ESAI_MIX_H
#define _FSL_ESAI_MIX_H
/* maximum client number is 4; */
#define MAX_CLIENT_NUM 4
/**
* fsl_esai_mix: esai mix/split data
* @chan: dma channel
* @fe_substream: handler of front end substream
* @client: handler of client
* @dma_buffer: structure of dma buffer
* @buffer_offset: read offset of buffer
* @buffer_bytes: buffer size in bytes
* @period_bytes: period size in bytes
* @period_num: period number
* @word_width: word width in bytes
* @channels: channel number
* @client_cnt: client number, default 2.
* @sdo_cnt: output pin number of esai
* @sdi_cnt: input pin number of esai
* @active: mixer is enabled or not
*/
struct fsl_esai_mix {
struct dma_chan *chan;
struct snd_pcm_substream *fe_substream[MAX_CLIENT_NUM];
struct fsl_esai_client *client[MAX_CLIENT_NUM];
struct snd_dma_buffer dma_buffer;
struct workqueue_struct *mix_wq;
struct work_struct work;
struct snd_pcm_substream *substream;
dma_cookie_t cookie;
u32 buffer_read_offset;
u32 buffer_write_offset;
u32 buffer_bytes;
u32 period_bytes;
u32 period_num;
u32 word_width;
u32 channels;
u32 client_cnt;
u32 sdo_cnt;
u32 sdi_cnt;
atomic_t active;
};
int fsl_esai_mix_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct fsl_esai_mix *mix);
int fsl_esai_mix_open(struct snd_pcm_substream *substream, struct fsl_esai_mix *mix);
int fsl_esai_mix_close(struct snd_pcm_substream *substream, struct fsl_esai_mix *mix);
int fsl_esai_mix_trigger(struct snd_pcm_substream *substream, int cmd,
struct fsl_esai_mix *mix);
int fsl_esai_mix_probe(struct device *dev, struct fsl_esai_mix *mix_rx, struct fsl_esai_mix *mix_tx);
int fsl_esai_mix_remove(struct device *dev, struct fsl_esai_mix *mix_rx, struct fsl_esai_mix *mix_tx);
#endif /* _FSL_ESAI_MIX_H */
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