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>
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2004-2014
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* Texas Instruments, <www.ti.com>
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*
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* Some changes copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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*/
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#ifndef _DAVINCI_I2C_H_
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#define _DAVINCI_I2C_H_
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#define I2C_WRITE 0
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#define I2C_READ 1
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struct i2c_regs {
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u32 i2c_oa;
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u32 i2c_ie;
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u32 i2c_stat;
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u32 i2c_scll;
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u32 i2c_sclh;
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u32 i2c_cnt;
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u32 i2c_drr;
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u32 i2c_sa;
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u32 i2c_dxr;
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u32 i2c_con;
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u32 i2c_iv;
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u32 res_2c;
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u32 i2c_psc;
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};
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/* I2C masks */
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/* I2C Interrupt Enable Register (I2C_IE): */
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#define I2C_IE_SCD_IE (1 << 5) /* Stop condition detect interrupt enable */
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#define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */
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#define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */
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#define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */
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#define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */
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#define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */
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/* I2C Status Register (I2C_STAT): */
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#define I2C_STAT_BB (1 << 12) /* Bus busy */
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#define I2C_STAT_ROVR (1 << 11) /* Receive overrun */
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#define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */
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#define I2C_STAT_AAS (1 << 9) /* Address as slave */
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#define I2C_STAT_SCD (1 << 5) /* Stop condition detect */
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#define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */
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#define I2C_STAT_RRDY (1 << 3) /* Receive data ready */
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#define I2C_STAT_ARDY (1 << 2) /* Register access ready */
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#define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */
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#define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */
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/* I2C Interrupt Code Register (I2C_INTCODE): */
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#define I2C_INTCODE_MASK 7
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#define I2C_INTCODE_NONE 0
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#define I2C_INTCODE_AL 1 /* Arbitration lost */
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#define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */
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#define I2C_INTCODE_ARDY 3 /* Register access ready */
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#define I2C_INTCODE_RRDY 4 /* Rcv data ready */
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#define I2C_INTCODE_XRDY 5 /* Xmit data ready */
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#define I2C_INTCODE_SCD 6 /* Stop condition detect */
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/* I2C Configuration Register (I2C_CON): */
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#define I2C_CON_EN (1 << 5) /* I2C module enable */
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#define I2C_CON_STB (1 << 4) /* Start byte mode (master mode only) */
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#define I2C_CON_MST (1 << 10) /* Master/slave mode */
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#define I2C_CON_TRX (1 << 9) /* Tx/Rx mode (master mode only) */
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#define I2C_CON_XA (1 << 8) /* Expand address */
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#define I2C_CON_STP (1 << 11) /* Stop condition (master mode only) */
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#define I2C_CON_STT (1 << 13) /* Start condition (master mode only) */
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#define I2C_CON_FREE (1 << 14) /* Free run on emulation */
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#define I2C_TIMEOUT 0xffff0000 /* Timeout mask for poll_i2c_irq() */
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#endif
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