linux-vybrid_public/drivers/gpu/drm/nouveau/nouveau_i2c.h

/*
 * Copyright 2009 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef __NOUVEAU_I2C_H__
#define __NOUVEAU_I2C_H__

#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/i2c-algo-bit.h>
#include "drm_dp_helper.h"

struct dcb_i2c_entry;

struct nouveau_i2c_chan {
	struct i2c_adapter adapter;
	struct drm_device *dev;
	union {
		struct i2c_algo_bit_data bit;
		struct i2c_algo_dp_aux_data dp;
	} algo;
	unsigned rd;
	unsigned wr;
	unsigned data;
};

int nouveau_i2c_init(struct drm_device *, struct dcb_i2c_entry *, int index);
void nouveau_i2c_fini(struct drm_device *, struct dcb_i2c_entry *);
struct nouveau_i2c_chan *nouveau_i2c_find(struct drm_device *, int index);

int nouveau_dp_i2c_aux_ch(struct i2c_adapter *, int mode, uint8_t write_byte,
			  uint8_t *read_byte);

#endif /* __NOUVEAU_I2C_H__ */