pmac_low_i2c.h
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/*
* include/asm-ppc/pmac_low_i2c.h
*
* Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org)
*
* 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.
*
*/
#ifndef __PMAC_LOW_I2C_H__
#define __PMAC_LOW_I2C_H__
/* i2c mode (based on the platform functions format) */
enum {
pmac_low_i2c_mode_dumb = 1,
pmac_low_i2c_mode_std = 2,
pmac_low_i2c_mode_stdsub = 3,
pmac_low_i2c_mode_combined = 4,
};
/* RW bit in address */
enum {
pmac_low_i2c_read = 0x01,
pmac_low_i2c_write = 0x00
};
/* Init, called early during boot */
extern void pmac_init_low_i2c(void);
/* Locking functions exposed to i2c-keywest */
int pmac_low_i2c_lock(struct device_node *np);
int pmac_low_i2c_unlock(struct device_node *np);
/* Access functions for platform code */
int pmac_low_i2c_open(struct device_node *np, int channel);
int pmac_low_i2c_close(struct device_node *np);
int pmac_low_i2c_setmode(struct device_node *np, int mode);
int pmac_low_i2c_xfer(struct device_node *np, u8 addrdir, u8 subaddr, u8 *data, int len);
#endif /* __PMAC_LOW_I2C_H__ */