1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
4 */
5
6#ifndef __SOUND_DESIGNWARE_I2S_H
7#define __SOUND_DESIGNWARE_I2S_H
8
9#include <linux/dmaengine.h>
10#include <linux/types.h>
11
12/*
13 * struct i2s_clk_config_data - represent i2s clk configuration data
14 * @chan_nr: number of channel
15 * @data_width: number of bits per sample (8/16/24/32 bit)
16 * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz)
17 */
18struct i2s_clk_config_data {
19 int chan_nr;
20 u32 data_width;
21 u32 sample_rate;
22};
23
24struct dw_i2s_dev;
25
26struct i2s_platform_data {
27 #define DWC_I2S_PLAY (1 << 0)
28 #define DWC_I2S_RECORD (1 << 1)
29 #define DW_I2S_SLAVE (1 << 2)
30 #define DW_I2S_MASTER (1 << 3)
31 unsigned int cap;
32 int channel;
33 u32 snd_fmts;
34 u32 snd_rates;
35
36 #define DW_I2S_QUIRK_COMP_REG_OFFSET (1 << 0)
37 #define DW_I2S_QUIRK_COMP_PARAM1 (1 << 1)
38 #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2)
39 unsigned int quirks;
40 unsigned int i2s_reg_comp1;
41 unsigned int i2s_reg_comp2;
42
43 void *play_dma_data;
44 void *capture_dma_data;
45 bool (*filter)(struct dma_chan *chan, void *slave);
46 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
47 int (*i2s_pd_init)(struct dw_i2s_dev *dev);
48};
49
50struct i2s_dma_data {
51 void *data;
52 dma_addr_t addr;
53 u32 max_burst;
54 enum dma_slave_buswidth addr_width;
55 bool (*filter)(struct dma_chan *chan, void *slave);
56};
57
58/* I2S DMA registers */
59#define I2S_RXDMA 0x01C0
60#define I2S_TXDMA 0x01C8
61
62#define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */
63#define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */
64#define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */
65#define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */
66
67#endif /* __SOUND_DESIGNWARE_I2S_H */
68

source code of linux/include/sound/designware_i2s.h