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 */
109
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