diff options
Diffstat (limited to 'sound/soc/fsl/fsl_asrc_common.h')
| -rw-r--r-- | sound/soc/fsl/fsl_asrc_common.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_asrc_common.h b/sound/soc/fsl/fsl_asrc_common.h new file mode 100644 index 000000000000..7e1c13ca37f1 --- /dev/null +++ b/sound/soc/fsl/fsl_asrc_common.h @@ -0,0 +1,108 @@ +/* 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 */ |