| 1 | /* ------------------------------------------------------------------------- */ |
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| 2 | /* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */ |
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| 3 | /* ------------------------------------------------------------------------- */ |
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| 4 | /* Copyright (C) 1995-99 Simon G. Vogl |
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| 5 | |
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| 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2 of the License, or |
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| 9 | (at your option) any later version. |
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| 10 | |
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| 11 | This program is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with this program; if not, write to the Free Software |
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| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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| 19 | /* ------------------------------------------------------------------------- */ |
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| 20 | |
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| 21 | /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even |
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| 22 | Frodo Looijaard <frodol@dds.nl> */ |
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| 23 | |
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| 24 | |
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| 25 | #ifndef _LINUX_I2C_ALGO_BIT_H |
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| 26 | #define _LINUX_I2C_ALGO_BIT_H |
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| 27 | |
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| 28 | /* --- Defines for bit-adapters --------------------------------------- */ |
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| 29 | /* |
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| 30 | * This struct contains the hw-dependent functions of bit-style adapters to |
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| 31 | * manipulate the line states, and to init any hw-specific features. This is |
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| 32 | * only used if you have more than one hw-type of adapter running. |
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| 33 | */ |
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| 34 | struct i2c_algo_bit_data { |
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| 35 | void *data; /* private data for lowlevel routines */ |
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| 36 | void (*setsda) (void *data, int state); |
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| 37 | void (*setscl) (void *data, int state); |
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| 38 | int (*getsda) (void *data); |
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| 39 | int (*getscl) (void *data); |
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| 40 | |
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| 41 | /* local settings */ |
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| 42 | int udelay; /* half-clock-cycle time in microsecs */ |
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| 43 | /* i.e. clock is (500 / udelay) KHz */ |
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| 44 | int mdelay; /* in millisecs, unused */ |
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| 45 | int timeout; /* in jiffies */ |
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| 46 | }; |
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| 47 | |
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| 48 | #define I2C_BIT_ADAP_MAX 16 |
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| 49 | |
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| 50 | int i2c_bit_add_bus(struct i2c_adapter *); |
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| 51 | int i2c_bit_del_bus(struct i2c_adapter *); |
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| 52 | |
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| 53 | #endif /* _LINUX_I2C_ALGO_BIT_H */ |
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