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include/i2s.h
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/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* * Copyright (C) 2012 Samsung Electronics * R. Chandrasekar <rcsekar@samsung.com> |
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*/ #ifndef __I2S_H__ #define __I2S_H__ /* * DAI hardware audio formats. * * Describes the physical PCM data formating and clocking. Add new formats * to the end. */ #define SND_SOC_DAIFMT_I2S 1 /* I2S mode */ #define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */ #define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */ #define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */ #define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */ #define SND_SOC_DAIFMT_AC97 6 /* AC97 */ #define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */ /* left and right justified also known as MSB and LSB respectively */ #define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J #define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J /* * DAI hardware signal inversions. * * Specifies whether the DAI can also support inverted clocks for the specified * format. */ #define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */ #define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */ #define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */ #define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */ /* * DAI hardware clock masters. * * This is wrt the codec, the inverse is true for the interface * i.e. if the codec is clk and FRM master then the interface is * clk and frame slave. */ #define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */ #define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */ #define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */ #define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */ #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0 #define SND_SOC_DAIFMT_INV_MASK 0x0f00 #define SND_SOC_DAIFMT_MASTER_MASK 0xf000 /* * Master Clock Directions */ #define SND_SOC_CLOCK_IN 0 #define SND_SOC_CLOCK_OUT 1 /* I2S Tx Control */ #define I2S_TX_ON 1 #define I2S_TX_OFF 0 #define FIFO_LENGTH 64 /* I2s Registers */ struct i2s_reg { unsigned int con; /* base + 0 , Control register */ unsigned int mod; /* Mode register */ unsigned int fic; /* FIFO control register */ unsigned int psr; /* Reserved */ unsigned int txd; /* Transmit data register */ unsigned int rxd; /* Receive Data Register */ }; /* This structure stores the i2s related information */ |
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struct i2s_uc_priv { |
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unsigned int rfs; /* LR clock frame size */ |
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unsigned int bfs; /* Bit clock frame size */ |
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unsigned int audio_pll_clk; /* Audio pll frequency in Hz */ unsigned int samplingrate; /* sampling rate */ unsigned int bitspersample; /* bits per sample */ unsigned int channels; /* audio channels */ unsigned int base_address; /* I2S Register Base */ |
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unsigned int id; /* I2S controller id */ |
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}; |
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/* Operations for i2s devices */ struct i2s_ops { /** * tx_data() - Transmit audio data * * @dev: I2C device * @data: Data buffer to play * @data_size: Size of data buffer in bytes * @return 0 if OK, -ve on error */ int (*tx_data)(struct udevice *dev, void *data, uint data_size); }; #define i2s_get_ops(dev) ((struct i2s_ops *)(dev)->driver->ops) /** * i2s_tx_data() - Transmit audio data * * @dev: I2C device * @data: Data buffer to play * @data_size: Size of data buffer in bytes * @return 0 if OK, -ve on error */ int i2s_tx_data(struct udevice *dev, void *data, uint data_size); |
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/* * Sends the given data through i2s tx * * @param pi2s_tx pointer of i2s transmitter parameter structure. * @param data address of the data buffer |
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* @param data_size size of the data (in bytes) |
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* @return int value 0 for success, -1 in case of error */ |
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int i2s_transfer_tx_data(struct i2s_uc_priv *pi2s_tx, void *data, uint data_size); |
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#endif /* __I2S_H__ */ |