include/linux/i2c-algo-ite.h

   1 /* ------------------------------------------------------------------------- */
   2 /* i2c-algo-ite.h i2c driver algorithms for ITE IIC adapters                 */
   3 /* ------------------------------------------------------------------------- */
   4 /*   Copyright (C) 1995-97 Simon G. Vogl
   5                    1998-99 Hans Berglund
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
  20 /* ------------------------------------------------------------------------- */
  21
  22 /* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
  23    Frodo Looijaard <frodol@dds.nl> */
  24
  25 /* Modifications by MontaVista Software, 2001
  26    Changes made to support the ITE IIC peripheral */
  27
  28
  29 #ifndef I2C_ALGO_ITE_H
  30 #define I2C_ALGO_ITE_H 1
  31
  32 #include <linux/types.h>
  33
  34 /* Example of a sequential read request:
  35         struct i2c_iic_msg s_msg;
  36
  37         s_msg.addr=device_address;
  38         s_msg.len=length;
  39         s_msg.buf=buffer;
  40         s_msg.waddr=word_address;
  41         ioctl(file,I2C_SREAD, &s_msg);
  42  */
  43 #define I2C_SREAD       0x780   /* SREAD ioctl command */
  44
  45 struct i2c_iic_msg {
  46         __u16 addr;     /* device address */
  47         __u16 waddr;    /* word address */
  48         short len;      /* msg length */
  49         char *buf;      /* pointer to msg data */
  50 };
  51
  52 #ifdef __KERNEL__
  53 struct i2c_adapter;
  54
  55 struct i2c_algo_iic_data {
  56         void *data;             /* private data for lolevel routines    */
  57         void (*setiic) (void *data, int ctl, int val);
  58         int  (*getiic) (void *data, int ctl);
  59         int  (*getown) (void *data);
  60         int  (*getclock) (void *data);
  61         void (*waitforpin) (void);
  62
  63         /* local settings */
  64         int udelay;
  65         int mdelay;
  66         int timeout;
  67 };
  68
  69 int i2c_iic_add_bus(struct i2c_adapter *);
  70 int i2c_iic_del_bus(struct i2c_adapter *);
  71 #endif /* __KERNEL__ */
  72 #endif /* I2C_ALGO_ITE_H */