arch/arm/include/asm/arch-davinci/i2c_defs.h

/*
 * (C) Copyright 2004
 * Texas Instruments, <www.ti.com>
 *
 * Some changes copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#ifndef _DAVINCI_I2C_H_
#define _DAVINCI_I2C_H_

#define I2C_WRITE		0
#define I2C_READ		1

#ifndef CONFIG_SOC_DA8XX
#define I2C_BASE		0x01c21000
#else
#define I2C_BASE		0x01c22000
#endif

#define	I2C_OA			(I2C_BASE + 0x00)
#define I2C_IE			(I2C_BASE + 0x04)
#define I2C_STAT		(I2C_BASE + 0x08)
#define I2C_SCLL		(I2C_BASE + 0x0c)
#define I2C_SCLH		(I2C_BASE + 0x10)
#define I2C_CNT			(I2C_BASE + 0x14)
#define I2C_DRR			(I2C_BASE + 0x18)
#define I2C_SA			(I2C_BASE + 0x1c)
#define I2C_DXR			(I2C_BASE + 0x20)
#define I2C_CON			(I2C_BASE + 0x24)
#define I2C_IV			(I2C_BASE + 0x28)
#define I2C_PSC			(I2C_BASE + 0x30)

/* I2C masks */

/* I2C Interrupt Enable Register (I2C_IE): */
#define I2C_IE_SCD_IE	(1 << 5)	/* Stop condition detect interrupt enable */
#define I2C_IE_XRDY_IE	(1 << 4)	/* Transmit data ready interrupt enable */
#define I2C_IE_RRDY_IE	(1 << 3)	/* Receive data ready interrupt enable */
#define I2C_IE_ARDY_IE	(1 << 2)	/* Register access ready interrupt enable */
#define I2C_IE_NACK_IE	(1 << 1)	/* No acknowledgment interrupt enable */
#define I2C_IE_AL_IE	(1 << 0)	/* Arbitration lost interrupt enable */

/* I2C Status Register (I2C_STAT): */

#define I2C_STAT_BB	(1 << 12)	/* Bus busy */
#define I2C_STAT_ROVR	(1 << 11)	/* Receive overrun */
#define I2C_STAT_XUDF	(1 << 10)	/* Transmit underflow */
#define I2C_STAT_AAS	(1 << 9)	/* Address as slave */
#define I2C_STAT_SCD	(1 << 5)	/* Stop condition detect */
#define I2C_STAT_XRDY	(1 << 4)	/* Transmit data ready */
#define I2C_STAT_RRDY	(1 << 3)	/* Receive data ready */
#define I2C_STAT_ARDY	(1 << 2)	/* Register access ready */
#define I2C_STAT_NACK	(1 << 1)	/* No acknowledgment interrupt enable */
#define I2C_STAT_AL	(1 << 0)	/* Arbitration lost interrupt enable */


/* I2C Interrupt Code Register (I2C_INTCODE): */

#define I2C_INTCODE_MASK	7
#define I2C_INTCODE_NONE	0
#define I2C_INTCODE_AL		1	/* Arbitration lost */
#define I2C_INTCODE_NAK		2	/* No acknowledgement/general call */
#define I2C_INTCODE_ARDY	3	/* Register access ready */
#define I2C_INTCODE_RRDY	4	/* Rcv data ready */
#define I2C_INTCODE_XRDY	5	/* Xmit data ready */
#define I2C_INTCODE_SCD		6	/* Stop condition detect */


/* I2C Configuration Register (I2C_CON): */

#define I2C_CON_EN	(1 << 5)	/* I2C module enable */
#define I2C_CON_STB	(1 << 4)	/* Start byte mode (master mode only) */
#define I2C_CON_MST	(1 << 10)	/* Master/slave mode */
#define I2C_CON_TRX	(1 << 9)	/* Transmitter/receiver mode (master mode only) */
#define I2C_CON_XA	(1 << 8)	/* Expand address */
#define I2C_CON_STP	(1 << 11)	/* Stop condition (master mode only) */
#define I2C_CON_STT	(1 << 13)	/* Start condition (master mode only) */
#define I2C_CON_FREE	(1 << 14)	/* Free run on emulation */

#define I2C_TIMEOUT	0xffff0000	/* Timeout mask for poll_i2c_irq() */

#endif