linux/drivers/gpu/drm/mgag200/mgag200_ddc.c

/*
 * Copyright 2012 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
/*
 * Authors: Dave Airlie <[email protected]>
 */

#include <linux/export.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c.h>
#include <linux/pci.h>

#include <drm/drm_managed.h>

#include "mgag200_ddc.h"
#include "mgag200_drv.h"

struct mgag200_ddc { … };

static int mga_i2c_read_gpio(struct mga_device *mdev)
{ … }

static void mga_i2c_set_gpio(struct mga_device *mdev, int mask, int val)
{ … }

static inline void mga_i2c_set(struct mga_device *mdev, int mask, int state)
{ … }

static void mgag200_ddc_algo_bit_data_setsda(void *data, int state)
{ … }

static void mgag200_ddc_algo_bit_data_setscl(void *data, int state)
{ … }

static int mgag200_ddc_algo_bit_data_getsda(void *data)
{ … }

static int mgag200_ddc_algo_bit_data_getscl(void *data)
{ … }

static int mgag200_ddc_algo_bit_data_pre_xfer(struct i2c_adapter *adapter)
{ … }

static void mgag200_ddc_algo_bit_data_post_xfer(struct i2c_adapter *adapter)
{ … }

static void mgag200_ddc_release(struct drm_device *dev, void *res)
{ … }

struct i2c_adapter *mgag200_ddc_create(struct mga_device *mdev)
{ … }