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i2c-algo-bit.h

/* ------------------------------------------------------------------------- */
/* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters               */
/* ------------------------------------------------------------------------- */
/*   Copyright (C) 1995-99 Simon G. Vogl

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
/* ------------------------------------------------------------------------- */

/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
   Frodo Looijaard <frodol@dds.nl> */

/* $Id: i2c-algo-bit.h,v 1.11 2003/07/25 07:56:42 khali Exp $ */

#ifndef _LINUX_I2C_ALGO_BIT_H
#define _LINUX_I2C_ALGO_BIT_H

/* --- Defines for bit-adapters --------------------------------------- */
/*
 * This struct contains the hw-dependent functions of bit-style adapters to 
 * manipulate the line states, and to init any hw-specific features. This is
 * only used if you have more than one hw-type of adapter running. 
 */
struct i2c_algo_bit_data {
      void *data;       /* private data for lowlevel routines */
      void (*setsda) (void *data, int state);
      void (*setscl) (void *data, int state);
      int  (*getsda) (void *data);
      int  (*getscl) (void *data);

      /* local settings */
      int udelay;       /* half-clock-cycle time in microsecs */
                        /* i.e. clock is (500 / udelay) KHz */
      int mdelay;       /* in millisecs, unused */
      int timeout;            /* in jiffies */
};

#define I2C_BIT_ADAP_MAX      16

int i2c_bit_add_bus(struct i2c_adapter *);
int i2c_bit_del_bus(struct i2c_adapter *);

#endif /* _LINUX_I2C_ALGO_BIT_H */

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