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 */ 18 struct i2s_clk_config_data { 19 int chan_nr; 20 u32 data_width; 21 u32 sample_rate; 22 }; 23 24 struct i2s_platform_data { 25 #define DWC_I2S_PLAY (1 << 0) 26 #define DWC_I2S_RECORD (1 << 1) 27 #define DW_I2S_SLAVE (1 << 2) 28 #define DW_I2S_MASTER (1 << 3) 29 unsigned int cap; 30 int channel; 31 u32 snd_fmts; 32 u32 snd_rates; 33 34 #define DW_I2S_QUIRK_COMP_REG_OFFSET (1 << 0) 35 #define DW_I2S_QUIRK_COMP_PARAM1 (1 << 1) 36 #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2) 37 unsigned int quirks; 38 unsigned int i2s_reg_comp1; 39 unsigned int i2s_reg_comp2; 40 41 void *play_dma_data; 42 void *capture_dma_data; 43 bool (*filter)(struct dma_chan *chan, void *slave); 44 int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); 45 }; 46 47 struct i2s_dma_data { 48 void *data; 49 dma_addr_t addr; 50 u32 max_burst; 51 enum dma_slave_buswidth addr_width; 52 bool (*filter)(struct dma_chan *chan, void *slave); 53 }; 54 55 /* I2S DMA registers */ 56 #define I2S_RXDMA 0x01C0 57 #define I2S_TXDMA 0x01C8 58 59 #define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ 60 #define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */ 61 #define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */ 62 #define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */ 63 64 #endif /* __SOUND_DESIGNWARE_I2S_H */ 65