name : designware_i2s.h /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com) */ #ifndef __SOUND_DESIGNWARE_I2S_H #define __SOUND_DESIGNWARE_I2S_H #include <linux/dmaengine.h> #include <linux/types.h> /* * struct i2s_clk_config_data - represent i2s clk configuration data * @chan_nr: number of channel * @data_width: number of bits per sample (8/16/24/32 bit) * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz) */ struct i2s_clk_config_data { int chan_nr; u32 data_width; u32 sample_rate; }; struct dw_i2s_dev; struct i2s_platform_data { #define DWC_I2S_PLAY (1 << 0) #define DWC_I2S_RECORD (1 << 1) #define DW_I2S_SLAVE (1 << 2) #define DW_I2S_MASTER (1 << 3) unsigned int cap; int channel; u32 snd_fmts; u32 snd_rates; #define DW_I2S_QUIRK_COMP_REG_OFFSET (1 << 0) #define DW_I2S_QUIRK_COMP_PARAM1 (1 << 1) #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2) unsigned int quirks; unsigned int i2s_reg_comp1; unsigned int i2s_reg_comp2; void *play_dma_data; void *capture_dma_data; bool (*filter)(struct dma_chan *chan, void *slave); int (*i2s_clk_cfg)(struct i2s_clk_config_data *config); int (*i2s_pd_init)(struct dw_i2s_dev *dev); }; struct i2s_dma_data { void *data; dma_addr_t addr; u32 max_burst; enum dma_slave_buswidth addr_width; bool (*filter)(struct dma_chan *chan, void *slave); }; /* I2S DMA registers */ #define I2S_RXDMA 0x01C0 #define I2S_TXDMA 0x01C8 #define TWO_CHANNEL_SUPPORT 2 /* up to 2.0 */ #define FOUR_CHANNEL_SUPPORT 4 /* up to 3.1 */ #define SIX_CHANNEL_SUPPORT 6 /* up to 5.1 */ #define EIGHT_CHANNEL_SUPPORT 8 /* up to 7.1 */ #endif /* __SOUND_DESIGNWARE_I2S_H */