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 #define NV_I2C_PORT(n)    (0x00 + (n))
31 #define NV_I2C_PORT_NUM    0x10
32 #define NV_I2C_DEFAULT(n) (0x80 + (n))
33 
34 struct nouveau_i2c_chan {
35 	struct i2c_adapter adapter;
36 	struct drm_device *dev;
37 	struct list_head head;
38 	u8  index;
39 	u8  type;
40 	u32 dcb;
41 	u32 drive;
42 	u32 sense;
43 	u32 state;
44 };
45 
46 int  nouveau_i2c_init(struct drm_device *);
47 void nouveau_i2c_fini(struct drm_device *);
48 struct nouveau_i2c_chan *nouveau_i2c_find(struct drm_device *, u8 index);
49 bool nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr);
50 int nouveau_i2c_identify(struct drm_device *dev, const char *what,
51 			 struct i2c_board_info *info,
52 			 bool (*match)(struct nouveau_i2c_chan *,
53 				       struct i2c_board_info *),
54 			 int index);
55 
56 extern const struct i2c_algorithm nouveau_dp_i2c_algo;
57 
58 #endif /* __NOUVEAU_I2C_H__ */
59