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