Subversion Repositories Kolibri OS

Rev

Rev 1408 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. /* ------------------------------------------------------------------------- */
  2. /* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters               */
  3. /* ------------------------------------------------------------------------- */
  4. /*   Copyright (C) 1995-99 Simon G. Vogl
  5.  
  6.     This program is free software; you can redistribute it and/or modify
  7.     it under the terms of the GNU General Public License as published by
  8.     the Free Software Foundation; either version 2 of the License, or
  9.     (at your option) any later version.
  10.  
  11.     This program is distributed in the hope that it will be useful,
  12.     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.     GNU General Public License for more details.
  15.  
  16.     You should have received a copy of the GNU General Public License
  17.     along with this program; if not, write to the Free Software
  18.     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
  19. /* ------------------------------------------------------------------------- */
  20.  
  21. /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
  22.    Frodo Looijaard <frodol@dds.nl> */
  23.  
  24. #ifndef _LINUX_I2C_ALGO_BIT_H
  25. #define _LINUX_I2C_ALGO_BIT_H
  26.  
  27. /* --- Defines for bit-adapters --------------------------------------- */
  28. /*
  29.  * This struct contains the hw-dependent functions of bit-style adapters to
  30.  * manipulate the line states, and to init any hw-specific features. This is
  31.  * only used if you have more than one hw-type of adapter running.
  32.  */
  33. struct i2c_algo_bit_data {
  34.         void *data;             /* private data for lowlevel routines */
  35.         void (*setsda) (void *data, int state);
  36.         void (*setscl) (void *data, int state);
  37.         int  (*getsda) (void *data);
  38.         int  (*getscl) (void *data);
  39.         int  (*pre_xfer)  (struct i2c_adapter *);
  40.         void (*post_xfer) (struct i2c_adapter *);
  41.  
  42.         /* local settings */
  43.         int udelay;             /* half clock cycle time in us,
  44.                                    minimum 2 us for fast-mode I2C,
  45.                                    minimum 5 us for standard-mode I2C and SMBus,
  46.                                    maximum 50 us for SMBus */
  47.         int timeout;            /* in jiffies */
  48. };
  49.  
  50. int i2c_bit_add_bus(struct i2c_adapter *);
  51. int i2c_bit_add_numbered_bus(struct i2c_adapter *);
  52.  
  53. #endif /* _LINUX_I2C_ALGO_BIT_H */
  54.