linux/drivers/media/i2c/m52790.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * m52790 i2c ivtv driver.
 * Copyright (C) 2007  Hans Verkuil
 *
 * A/V source switching Mitsubishi M52790SP/FP
 */


#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/i2c/m52790.h>
#include <media/v4l2-device.h>

MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;


struct m52790_state { … };

static inline struct m52790_state *to_state(struct v4l2_subdev *sd)
{ … }

/* ----------------------------------------------------------------------- */

static int m52790_write(struct v4l2_subdev *sd)
{ … }

/* Note: audio and video are linked and cannot be switched separately.
   So audio and video routing commands are identical for this chip.
   In theory the video amplifier and audio modes could be handled
   separately for the output, but that seems to be overkill right now.
   The same holds for implementing an audio mute control, this is now
   part of the audio output routing. The normal case is that another
   chip takes care of the actual muting so making it part of the
   output routing seems to be the right thing to do for now. */
static int m52790_s_routing(struct v4l2_subdev *sd,
			    u32 input, u32 output, u32 config)
{ … }

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int m52790_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{ … }

static int m52790_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{ … }
#endif

static int m52790_log_status(struct v4l2_subdev *sd)
{ … }

/* ----------------------------------------------------------------------- */

static const struct v4l2_subdev_core_ops m52790_core_ops = …;

static const struct v4l2_subdev_audio_ops m52790_audio_ops = …;

static const struct v4l2_subdev_video_ops m52790_video_ops = …;

static const struct v4l2_subdev_ops m52790_ops = …;

/* ----------------------------------------------------------------------- */

/* i2c implementation */

static int m52790_probe(struct i2c_client *client)
{ … }

static void m52790_remove(struct i2c_client *client)
{ … }

/* ----------------------------------------------------------------------- */

static const struct i2c_device_id m52790_id[] = …;
MODULE_DEVICE_TABLE(i2c, m52790_id);

static struct i2c_driver m52790_driver = …;

module_i2c_driver(…) …;