mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2012 Samsung Electronics
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* R. Chandrasekar <rcsekar@samsung.com>
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*/
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#ifndef __I2S_H__
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#define __I2S_H__
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/*
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* DAI hardware audio formats.
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*
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* Describes the physical PCM data formating and clocking. Add new formats
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* to the end.
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*/
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#define SND_SOC_DAIFMT_I2S 1 /* I2S mode */
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#define SND_SOC_DAIFMT_RIGHT_J 2 /* Right Justified mode */
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#define SND_SOC_DAIFMT_LEFT_J 3 /* Left Justified mode */
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#define SND_SOC_DAIFMT_DSP_A 4 /* L data MSB after FRM LRC */
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#define SND_SOC_DAIFMT_DSP_B 5 /* L data MSB during FRM LRC */
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#define SND_SOC_DAIFMT_AC97 6 /* AC97 */
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#define SND_SOC_DAIFMT_PDM 7 /* Pulse density modulation */
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/* left and right justified also known as MSB and LSB respectively */
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#define SND_SOC_DAIFMT_MSB SND_SOC_DAIFMT_LEFT_J
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#define SND_SOC_DAIFMT_LSB SND_SOC_DAIFMT_RIGHT_J
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/*
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* DAI hardware signal inversions.
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*
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* Specifies whether the DAI can also support inverted clocks for the specified
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* format.
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*/
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#define SND_SOC_DAIFMT_NB_NF (1 << 8) /* normal bit clock + frame */
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#define SND_SOC_DAIFMT_NB_IF (2 << 8) /* normal BCLK + inv FRM */
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#define SND_SOC_DAIFMT_IB_NF (3 << 8) /* invert BCLK + nor FRM */
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#define SND_SOC_DAIFMT_IB_IF (4 << 8) /* invert BCLK + FRM */
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/*
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* DAI hardware clock masters.
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*
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* This is wrt the codec, the inverse is true for the interface
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* i.e. if the codec is clk and FRM master then the interface is
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* clk and frame slave.
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*/
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#define SND_SOC_DAIFMT_CBM_CFM (1 << 12) /* codec clk & FRM master */
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#define SND_SOC_DAIFMT_CBS_CFM (2 << 12) /* codec clk slave & FRM master */
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#define SND_SOC_DAIFMT_CBM_CFS (3 << 12) /* codec clk master & frame slave */
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#define SND_SOC_DAIFMT_CBS_CFS (4 << 12) /* codec clk & FRM slave */
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#define SND_SOC_DAIFMT_FORMAT_MASK 0x000f
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#define SND_SOC_DAIFMT_CLOCK_MASK 0x00f0
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#define SND_SOC_DAIFMT_INV_MASK 0x0f00
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#define SND_SOC_DAIFMT_MASTER_MASK 0xf000
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/*
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* Master Clock Directions
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*/
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#define SND_SOC_CLOCK_IN 0
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#define SND_SOC_CLOCK_OUT 1
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/* I2S Tx Control */
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#define I2S_TX_ON 1
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#define I2S_TX_OFF 0
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#define FIFO_LENGTH 64
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/* I2s Registers */
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struct i2s_reg {
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unsigned int con; /* base + 0 , Control register */
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unsigned int mod; /* Mode register */
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unsigned int fic; /* FIFO control register */
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unsigned int psr; /* Reserved */
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unsigned int txd; /* Transmit data register */
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unsigned int rxd; /* Receive Data Register */
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};
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/* This structure stores the i2s related information */
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struct i2stx_info {
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unsigned int rfs; /* LR clock frame size */
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unsigned int bfs; /* Bit slock frame size */
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unsigned int audio_pll_clk; /* Audio pll frequency in Hz */
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unsigned int samplingrate; /* sampling rate */
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unsigned int bitspersample; /* bits per sample */
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unsigned int channels; /* audio channels */
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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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/*
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* Sends the given data through i2s tx
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*
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* @param pi2s_tx pointer of i2s transmitter parameter structure.
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* @param data address of the data buffer
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* @param data_size array size of the int buffer (total size / size of int)
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*
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* @return int value 0 for success, -1 in case of error
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*/
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int i2s_transfer_tx_data(struct i2stx_info *pi2s_tx, unsigned *data,
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unsigned long data_size);
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/*
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* Initialise i2s transmiter
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*
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* @param pi2s_tx pointer of i2s transmitter parameter structure.
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*
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* @return int value 0 for success, -1 in case of error
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*/
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int i2s_tx_init(struct i2stx_info *pi2s_tx);
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#endif /* __I2S_H__ */
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