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 dw_i2s_dev; 25 26 struct 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 50 struct 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