drivers/gpu/drm/nouveau/nouveau_i2c.h

   1 /*
   2  * Copyright 2009 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef __NOUVEAU_I2C_H__
  24 #define __NOUVEAU_I2C_H__
  25
  26 #include <linux/i2c.h>
  27 #include <linux/i2c-algo-bit.h>
  28 #include "drm_dp_helper.h"
  29
  30 struct dcb_i2c_entry;
  31
  32 struct nouveau_i2c_chan {
  33         struct i2c_adapter adapter;
  34         struct drm_device *dev;
  35         struct i2c_algo_bit_data bit;
  36         unsigned rd;
  37         unsigned wr;
  38         unsigned data;
  39 };
  40
  41 int nouveau_i2c_init(struct drm_device *, struct dcb_i2c_entry *, int index);
  42 void nouveau_i2c_fini(struct drm_device *, struct dcb_i2c_entry *);
  43 struct nouveau_i2c_chan *nouveau_i2c_find(struct drm_device *, int index);
  44 bool nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr);
  45 int nouveau_i2c_identify(struct drm_device *dev, const char *what,
  46                          struct i2c_board_info *info,
  47                          bool (*match)(struct nouveau_i2c_chan *,
  48                                        struct i2c_board_info *),
  49                          int index);
  50
  51 extern const struct i2c_algorithm nouveau_dp_i2c_algo;
  52
  53 #endif /* __NOUVEAU_I2C_H__ */