sound/soc/fsl/fsl_asrc_common.h

   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
  14 enum 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  */
  38 struct 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  */
  78 struct 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"
 106 extern struct snd_soc_component_driver fsl_asrc_component;
 107
 108 #endif /* _FSL_ASRC_COMMON_H */