104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
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/*
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* Freescale I2C Controller
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*
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* This software may be used and distributed according to the
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* terms of the GNU Public License, Version 2, incorporated
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* herein by reference.
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*
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* Copyright 2004 Freescale Semiconductor.
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* (C) Copyright 2003, Motorola, Inc.
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* author: Eran Liberty (liberty@freescale.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _ASM_I2C_H_
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#define _ASM_I2C_H_
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#include <asm/types.h>
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typedef struct i2c
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{
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u8 adr; /**< I2C slave address */
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#define I2C_ADR 0xFE
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#define I2C_ADR_SHIFT 1
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#define I2C_ADR_RES ~(I2C_ADR)
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u8 res0[3];
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u8 fdr; /**< I2C frequency divider register */
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#define IC2_FDR 0x3F
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#define IC2_FDR_SHIFT 0
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#define IC2_FDR_RES ~(IC2_FDR)
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u8 res1[3];
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u8 cr; /**< I2C control redister */
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#define I2C_CR_MEN 0x80
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#define I2C_CR_MIEN 0x40
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#define I2C_CR_MSTA 0x20
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#define I2C_CR_MTX 0x10
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#define I2C_CR_TXAK 0x08
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#define I2C_CR_RSTA 0x04
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#define I2C_CR_BCST 0x01
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u8 res2[3];
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u8 sr; /**< I2C status register */
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#define I2C_SR_MCF 0x80
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#define I2C_SR_MAAS 0x40
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#define I2C_SR_MBB 0x20
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#define I2C_SR_MAL 0x10
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#define I2C_SR_BCSTM 0x08
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#define I2C_SR_SRW 0x04
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#define I2C_SR_MIF 0x02
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#define I2C_SR_RXAK 0x01
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u8 res3[3];
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u8 dr; /**< I2C data register */
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#define I2C_DR 0xFF
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#define I2C_DR_SHIFT 0
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#define I2C_DR_RES ~(I2C_DR)
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u8 res4[3];
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u8 dfsrr; /**< I2C digital filter sampling rate register */
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#define I2C_DFSRR 0x3F
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#define I2C_DFSRR_SHIFT 0
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#define I2C_DFSRR_RES ~(I2C_DR)
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u8 res5[3];
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u8 res6[0xE8];
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} i2c_t;
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#ifndef CFG_HZ
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#error CFG_HZ is not defined in /include/configs/${BOARD}.h
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#endif
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#define I2C_TIMEOUT (CFG_HZ/4)
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#ifndef CFG_IMMRBAR
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#error CFG_IMMRBAR is not defined in /include/configs/${BOARD}.h
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#endif
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#ifndef CFG_I2C_OFFSET
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#error CFG_I2C_OFFSET is not defined in /include/configs/${BOARD}.h
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#endif
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#if defined(CONFIG_MPC8349ADS) || defined(CONFIG_TQM834X)
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/*
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* MPC8349 have two i2c bus
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*/
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extern i2c_t * mpc8349_i2c;
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#define I2C mpc8349_i2c
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#else
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#define I2C ((i2c_t*)(CFG_IMMRBAR + CFG_I2C_OFFSET))
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#endif
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#define I2C_READ 1
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#define I2C_WRITE 0
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#endif /* _ASM_I2C_H_ */
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