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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__ */ |