drivers/video/via/via_i2c.h

   1 /*
   2  * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   4
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public
   7  * License as published by the Free Software Foundation;
   8  * either version 2, or (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
  12  * the implied warranty of MERCHANTABILITY or FITNESS FOR
  13  * A PARTICULAR PURPOSE.See the GNU General Public License
  14  * 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.,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21 #ifndef __VIA_I2C_H__
  22 #define __VIA_I2C_H__
  23
  24 #include <linux/i2c.h>
  25 #include <linux/i2c-algo-bit.h>
  26
  27 enum via_i2c_type {
  28         VIA_I2C_NONE,
  29         VIA_I2C_I2C,
  30         VIA_I2C_GPIO,
  31 };
  32
  33 /* private data for each adapter */
  34 struct via_i2c_adap_cfg {
  35         enum via_i2c_type       type;
  36         u_int16_t               io_port;
  37         u_int8_t                ioport_index;
  38         u8                      is_active;
  39 };
  40
  41 struct via_i2c_stuff {
  42         u16 i2c_port;                   /* GPIO or I2C port */
  43         struct i2c_adapter adapter;
  44         struct i2c_algo_bit_data algo;
  45 };
  46
  47 enum viafb_i2c_adap {
  48         VIA_I2C_ADAP_26,
  49         VIA_I2C_ADAP_31,
  50         VIA_I2C_ADAP_25,
  51         VIA_I2C_ADAP_2C,
  52         VIA_I2C_ADAP_3D,
  53 };
  54
  55 int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata);
  56 int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data);
  57 int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len);
  58
  59 struct viafb_par;
  60 int viafb_create_i2c_busses(struct viafb_par *par);
  61 void viafb_delete_i2c_busses(struct viafb_par *par);
  62 #endif /* __VIA_I2C_H__ */