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/* ------------------------------------------------------------------------- */ |
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/* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */ |
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/* ------------------------------------------------------------------------- */ |
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/* Copyright (C) 1995-99 Simon G. Vogl |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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MA 02110-1301 USA. */ |
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/* ------------------------------------------------------------------------- */ |
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/* With some changes from Kyösti Mälkki and even |
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Frodo Looijaard */ |
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#ifndef _LINUX_I2C_ALGO_BIT_H |
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#define _LINUX_I2C_ALGO_BIT_H |
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/* --- Defines for bit-adapters --------------------------------------- */ |
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/* |
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* This struct contains the hw-dependent functions of bit-style adapters to |
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* manipulate the line states, and to init any hw-specific features. This is |
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* only used if you have more than one hw-type of adapter running. |
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*/ |
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struct i2c_algo_bit_data { |
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void *data; /* private data for lowlevel routines */ |
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void (*setsda) (void *data, int state); |
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void (*setscl) (void *data, int state); |
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int (*getsda) (void *data); |
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int (*getscl) (void *data); |
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int (*pre_xfer) (struct i2c_adapter *); |
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void (*post_xfer) (struct i2c_adapter *); |
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/* local settings */ |
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int udelay; /* half clock cycle time in us, |
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minimum 2 us for fast-mode I2C, |
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minimum 5 us for standard-mode I2C and SMBus, |
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maximum 50 us for SMBus */ |
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int timeout; /* in jiffies */ |
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}; |
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int i2c_bit_add_bus(struct i2c_adapter *); |
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int i2c_bit_add_numbered_bus(struct i2c_adapter *); |
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extern const struct i2c_algorithm i2c_bit_algo; |
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#endif /* _LINUX_I2C_ALGO_BIT_H */ |