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Diffstat (limited to '')
| -rw-r--r-- | include/sound/designware_i2s.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/include/sound/designware_i2s.h b/include/sound/designware_i2s.h new file mode 100644 index 0000000000..f6803205a9 --- /dev/null +++ b/include/sound/designware_i2s.h @@ -0,0 +1,67 @@ +/* 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 */ |