| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-ppc/pmac_low_i2c.h |
| 3 | * |
| 4 | * Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | #ifndef __PMAC_LOW_I2C_H__ |
| 13 | #define __PMAC_LOW_I2C_H__ |
| 14 | |
| 15 | /* i2c mode (based on the platform functions format) */ |
| 16 | enum { |
| 17 | pmac_low_i2c_mode_dumb = 1, |
| 18 | pmac_low_i2c_mode_std = 2, |
| 19 | pmac_low_i2c_mode_stdsub = 3, |
| 20 | pmac_low_i2c_mode_combined = 4, |
| 21 | }; |
| 22 | |
| 23 | /* RW bit in address */ |
| 24 | enum { |
| 25 | pmac_low_i2c_read = 0x01, |
| 26 | pmac_low_i2c_write = 0x00 |
| 27 | }; |
| 28 | |
| 29 | /* Init, called early during boot */ |
| 30 | extern void pmac_init_low_i2c(void); |
| 31 | |
| 32 | /* Locking functions exposed to i2c-keywest */ |
| 33 | int pmac_low_i2c_lock(struct device_node *np); |
| 34 | int pmac_low_i2c_unlock(struct device_node *np); |
| 35 | |
| 36 | /* Access functions for platform code */ |
| 37 | int pmac_low_i2c_open(struct device_node *np, int channel); |
| 38 | int pmac_low_i2c_close(struct device_node *np); |
| 39 | int pmac_low_i2c_setmode(struct device_node *np, int mode); |
| 40 | int pmac_low_i2c_xfer(struct device_node *np, u8 addrdir, u8 subaddr, u8 *data, int len); |
| 41 | |
| 42 | |
| 43 | #endif /* __PMAC_LOW_I2C_H__ */ |