| 1 | /* $Id$ |
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| 2 | * $URL$ |
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| 3 | * |
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| 4 | * generic driver helper for i2c displays |
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| 5 | * |
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| 6 | * Copyright (C) 2005 Luis Correia <lfcorreia@users.sf.net> |
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| 7 | * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> |
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| 8 | * |
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| 9 | * This file is part of LCD4Linux. |
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| 10 | * |
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| 11 | * LCD4Linux is free software; you can redistribute it and/or modify |
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| 12 | * it under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; either version 2, or (at your option) |
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| 14 | * any later version. |
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| 15 | * |
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| 16 | * LCD4Linux is distributed in the hope that it will be useful, |
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 19 | * GNU General Public License for more details. |
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| 20 | * |
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| 21 | * You should have received a copy of the GNU General Public License |
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| 22 | * along with this program; if not, write to the Free Software |
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| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 24 | * |
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| 25 | */ |
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| 26 | |
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| 27 | /* |
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| 28 | * |
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| 29 | * exported fuctions: |
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| 30 | * |
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| 31 | * int drv_generic_i2c_open (void) |
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| 32 | * reads 'Port' entry from config and opens |
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| 33 | * the i2c port |
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| 34 | * returns 0 if ok, -1 on failure |
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| 35 | * |
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| 36 | * int drv_generic_i2c_close (void) |
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| 37 | * closes i2c port |
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| 38 | * returns 0 if ok, -1 on failure |
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| 39 | * |
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| 40 | * unsigned char drv_generic_i2c_wire (char *name, char *deflt) |
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| 41 | * reads wiring for one data signal from config |
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| 42 | * returns 1<<bitpos or 255 on error |
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| 43 | * |
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| 44 | * void drv_generic_i2c_data (unsigned char value) |
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| 45 | * put data bits on DB1..DB8 |
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| 46 | * |
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| 47 | * void drv_generic_i2c_command(unsigned char command, unsigned char *data,unsigned char length) |
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| 48 | * send command and the data to the i2c device |
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| 49 | * |
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| 50 | */ |
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| 51 | |
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| 52 | #ifndef _DRV_GENERIC_I2C_H_ |
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| 53 | #define _DRV_GENERIC_I2C_H_ |
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| 54 | |
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| 55 | int drv_generic_i2c_open(const char *section, const char *driver); |
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| 56 | int drv_generic_i2c_close(void); |
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| 57 | unsigned char drv_generic_i2c_wire(const char *name, const char *deflt); |
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| 58 | void drv_generic_i2c_data(const unsigned char data); |
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| 59 | void drv_generic_i2c_command(const unsigned char command, /*const */ unsigned char *data, const unsigned char length); |
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| 60 | |
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| 61 | #endif |
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