LXR linux/sound/soc/fsl/fsl_asrc

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright 2019 NXP
   4 *
   5 */
   6
   7#ifndef _FSL_ASRC_COMMON_H
   8#define _FSL_ASRC_COMMON_H
   9
  10/* directions */
  11#define IN      0
  12#define OUT     1
  13
  14enum asrc_pair_index {
  15        ASRC_INVALID_PAIR = -1,
  16        ASRC_PAIR_A = 0,
  17        ASRC_PAIR_B = 1,
  18        ASRC_PAIR_C = 2,
  19        ASRC_PAIR_D = 3,
  20};
  21
  22#define PAIR_CTX_NUM  0x4
  23
  24/**
  25 * fsl_asrc_pair: ASRC Pair common data
  26 *
  27 * @asrc: pointer to its parent module
  28 * @error: error record
  29 * @index: pair index (ASRC_PAIR_A, ASRC_PAIR_B, ASRC_PAIR_C)
  30 * @channels: occupied channel number
  31 * @desc: input and output dma descriptors
  32 * @dma_chan: inputer and output DMA channels
  33 * @dma_data: private dma data
  34 * @pos: hardware pointer position
  35 * @req_dma_chan: flag to release dev_to_dev chan
  36 * @private: pair private area
  37 */
  38struct fsl_asrc_pair {
  39        struct fsl_asrc *asrc;
  40        unsigned int error;
  41
  42        enum asrc_pair_index index;
  43        unsigned int channels;
  44
  45        struct dma_async_tx_descriptor *desc[2];
  46        struct dma_chan *dma_chan[2];
  47        struct imx_dma_data dma_data;
  48        unsigned int pos;
  49        bool req_dma_chan;
  50
  51        void *private;
  52};
  53
  54/**
  55 * fsl_asrc: ASRC common data
  56 *
  57 * @dma_params_rx: DMA parameters for receive channel
  58 * @dma_params_tx: DMA parameters for transmit channel
  59 * @pdev: platform device pointer
  60 * @regmap: regmap handler
  61 * @paddr: physical address to the base address of registers
  62 * @mem_clk: clock source to access register
  63 * @ipg_clk: clock source to drive peripheral
  64 * @spba_clk: SPBA clock (optional, depending on SoC design)
  65 * @lock: spin lock for resource protection
  66 * @pair: pair pointers
  67 * @channel_avail: non-occupied channel numbers
  68 * @asrc_rate: default sample rate for ASoC Back-Ends
  69 * @asrc_format: default sample format for ASoC Back-Ends
  70 * @use_edma: edma is used
  71 * @get_dma_channel: function pointer
  72 * @request_pair: function pointer
  73 * @release_pair: function pointer
  74 * @get_fifo_addr: function pointer
  75 * @pair_priv_size: size of pair private struct.
  76 * @private: private data structure
  77 */
  78struct fsl_asrc {
  79        struct snd_dmaengine_dai_dma_data dma_params_rx;
  80        struct snd_dmaengine_dai_dma_data dma_params_tx;
  81        struct platform_device *pdev;
  82        struct regmap *regmap;
  83        unsigned long paddr;
  84        struct clk *mem_clk;
  85        struct clk *ipg_clk;
  86        struct clk *spba_clk;
  87        spinlock_t lock;      /* spin lock for resource protection */
  88
  89        struct fsl_asrc_pair *pair[PAIR_CTX_NUM];
  90        unsigned int channel_avail;
  91
  92        int asrc_rate;
  93        snd_pcm_format_t asrc_format;
  94        bool use_edma;
  95
  96        struct dma_chan *(*get_dma_channel)(struct fsl_asrc_pair *pair, bool dir);
  97        int (*request_pair)(int channels, struct fsl_asrc_pair *pair);
  98        void (*release_pair)(struct fsl_asrc_pair *pair);
  99        int (*get_fifo_addr)(u8 dir, enum asrc_pair_index index);
 100        size_t pair_priv_size;
 101
 102        void *private;
 103};
 104
 105#define DRV_NAME "fsl-asrc-dai"
 106extern struct snd_soc_component_driver fsl_asrc_component;
 107
 108#endif /* _FSL_ASRC_COMMON_H */
 109