forked from rrcarlosr/Jetpack
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
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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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* SPDX-License-Identifier: GPL-2.0+
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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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