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Diffstat (limited to 'include/asm-ppc/i2c.h')
| -rw-r--r-- | include/asm-ppc/i2c.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/include/asm-ppc/i2c.h b/include/asm-ppc/i2c.h new file mode 100644 index 0000000..e7ec9aa --- /dev/null +++ b/include/asm-ppc/i2c.h @@ -0,0 +1,104 @@ +/* + * Freescale I2C Controller + * + * This software may be used and distributed according to the + * terms of the GNU Public License, Version 2, incorporated + * herein by reference. + * + * Copyright 2004 Freescale Semiconductor. + * (C) Copyright 2003, Motorola, Inc. + * author: Eran Liberty (liberty@freescale.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _ASM_I2C_H_ +#define _ASM_I2C_H_ + +#include <asm/types.h> + +typedef struct i2c +{ + u8 adr; /**< I2C slave address */ +#define I2C_ADR 0xFE +#define I2C_ADR_SHIFT 1 +#define I2C_ADR_RES ~(I2C_ADR) + u8 res0[3]; + u8 fdr; /**< I2C frequency divider register */ + +#define IC2_FDR 0x3F +#define IC2_FDR_SHIFT 0 +#define IC2_FDR_RES ~(IC2_FDR) + u8 res1[3]; + u8 cr; /**< I2C control redister */ +#define I2C_CR_MEN 0x80 +#define I2C_CR_MIEN 0x40 +#define I2C_CR_MSTA 0x20 +#define I2C_CR_MTX 0x10 +#define I2C_CR_TXAK 0x08 +#define I2C_CR_RSTA 0x04 +#define I2C_CR_BCST 0x01 + u8 res2[3]; + u8 sr; /**< I2C status register */ +#define I2C_SR_MCF 0x80 +#define I2C_SR_MAAS 0x40 +#define I2C_SR_MBB 0x20 +#define I2C_SR_MAL 0x10 +#define I2C_SR_BCSTM 0x08 +#define I2C_SR_SRW 0x04 +#define I2C_SR_MIF 0x02 +#define I2C_SR_RXAK 0x01 + u8 res3[3]; + u8 dr; /**< I2C data register */ +#define I2C_DR 0xFF +#define I2C_DR_SHIFT 0 +#define I2C_DR_RES ~(I2C_DR) + u8 res4[3]; + u8 dfsrr; /**< I2C digital filter sampling rate register */ +#define I2C_DFSRR 0x3F +#define I2C_DFSRR_SHIFT 0 +#define I2C_DFSRR_RES ~(I2C_DR) + u8 res5[3]; + u8 res6[0xE8]; +} i2c_t; + +#ifndef CFG_HZ +#error CFG_HZ is not defined in /include/configs/${BOARD}.h +#endif +#define I2C_TIMEOUT (CFG_HZ/4) + +#ifndef CFG_IMMRBAR +#error CFG_IMMRBAR is not defined in /include/configs/${BOARD}.h +#endif + +#ifndef CFG_I2C_OFFSET +#error CFG_I2C_OFFSET is not defined in /include/configs/${BOARD}.h +#endif + +#ifdef CONFIG_MPC8349ADS +/* + * MPC8349 have two i2c bus + */ +extern i2c_t * mpc8349_i2c; +#define I2C mpc8349_i2c +#else +#define I2C ((i2c_t*)(CFG_IMMRBAR + CFG_I2C_OFFSET)) +#endif + +#define I2C_READ 1 +#define I2C_WRITE 0 + +#endif /* _ASM_I2C_H_ */ |