projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 511ed5fd RS |
1 | /* |
| 2 | * Copyright (C) 2012 Samsung Electronics | |
| 3 | * R. Chandrasekar <[email protected]> | |
| 4 | * | |
| 1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 511ed5fd RS |
6 | */ |
| 7 | ||
| 8 | #ifndef __I2S_H__ | |
| 9 | #define __I2S_H__ | |
| 10 | ||
| 11 | /* | |
| 12 | * DAI hardware audio formats. | |
| 13 | * | |
| 14 | * Describes the physical PCM data formating and clocking. Add new formats | |
| 15 | * to the end. | |
| 16 | */ | |
| 17 | #define SND_SOC_DAIFMT_I2S 1 /* I2S mode */ | |
| 18 | #define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */ | |
| 19 | #define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */ | |
| 20 | #define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */ | |
| 21 | #define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */ | |
| 22 | #define SND_SOC_DAIFMT_AC97 6 /* AC97 */ | |
| 23 | #define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */ | |
| 24 | ||
| 25 | /* left and right justified also known as MSB and LSB respectively */ | |
| 26 | #define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J | |
| 27 | #define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J | |
| 28 | ||
| 29 | /* | |
| 30 | * DAI hardware signal inversions. | |
| 31 | * | |
| 32 | * Specifies whether the DAI can also support inverted clocks for the specified | |
| 33 | * format. | |
| 34 | */ | |
| 35 | #define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */ | |
| 36 | #define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */ | |
| 37 | #define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */ | |
| 38 | #define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */ | |
| 39 | ||
| 40 | /* | |
| 41 | * DAI hardware clock masters. | |
| 42 | * | |
| 43 | * This is wrt the codec, the inverse is true for the interface | |
| 44 | * i.e. if the codec is clk and FRM master then the interface is | |
| 45 | * clk and frame slave. | |
| 46 | */ | |
| 47 | #define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */ | |
| 48 | #define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */ | |
| 49 | #define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */ | |
| 50 | #define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */ | |
| 51 | ||
| 52 | #define SND_SOC_DAIFMT_FORMAT_MASK 0x000f | |
| 53 | #define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0 | |
| 54 | #define SND_SOC_DAIFMT_INV_MASK 0x0f00 | |
| 55 | #define SND_SOC_DAIFMT_MASTER_MASK 0xf000 | |
| 56 | ||
| 57 | /* | |
| 58 | * Master Clock Directions | |
| 59 | */ | |
| 60 | #define SND_SOC_CLOCK_IN 0 | |
| 61 | #define SND_SOC_CLOCK_OUT 1 | |
| 62 | ||
| 63 | /* I2S Tx Control */ | |
| 64 | #define I2S_TX_ON 1 | |
| 65 | #define I2S_TX_OFF 0 | |
| 66 | ||
| 67 | #define FIFO_LENGTH 64 | |
| 68 | ||
| 69 | /* I2s Registers */ | |
| 70 | struct i2s_reg { | |
| 71 | unsigned int con; /* base + 0 , Control register */ | |
| 72 | unsigned int mod; /* Mode register */ | |
| 73 | unsigned int fic; /* FIFO control register */ | |
| 74 | unsigned int psr; /* Reserved */ | |
| 75 | unsigned int txd; /* Transmit data register */ | |
| 76 | unsigned int rxd; /* Receive Data Register */ | |
| 77 | }; | |
| 78 | ||
| 79 | /* This structure stores the i2s related information */ | |
| 80 | struct i2stx_info { | |
| 81 | unsigned int rfs; /* LR clock frame size */ | |
| 82 | unsigned int bfs; /* Bit slock frame size */ | |
| 83 | unsigned int audio_pll_clk; /* Audio pll frequency in Hz */ | |
| 84 | unsigned int samplingrate; /* sampling rate */ | |
| 85 | unsigned int bitspersample; /* bits per sample */ | |
| 86 | unsigned int channels; /* audio channels */ | |
| 87 | unsigned int base_address; /* I2S Register Base */ | |
| d981d80d | 88 | unsigned int id; /* I2S controller id */ |
| 511ed5fd RS |
89 | }; |
| 90 | ||
| 91 | /* | |
| 92 | * Sends the given data through i2s tx | |
| 93 | * | |
| 94 | * @param pi2s_tx pointer of i2s transmitter parameter structure. | |
| 95 | * @param data address of the data buffer | |
| 96 | * @param data_size array size of the int buffer (total size / size of int) | |
| 97 | * | |
| 98 | * @return int value 0 for success, -1 in case of error | |
| 99 | */ | |
| 100 | int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned *data, | |
| 101 | unsigned long data_size); | |
| 102 | ||
| 103 | /* | |
| 104 | * Initialise i2s transmiter | |
| 105 | * | |
| 106 | * @param pi2s_tx pointer of i2s transmitter parameter structure. | |
| 107 | * | |
| 108 | * @return int value 0 for success, -1 in case of error | |
| 109 | */ | |
| 110 | int i2s_tx_init(struct i2stx_info *pi2s_tx); | |
| 111 | ||
| 112 | #endif /* __I2S_H__ */ |