linux/drivers/media/usb/au0828/au0828-i2c.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Driver for the Auvitek AU0828 USB bridge
 *
 *  Copyright (c) 2008 Steven Toth <[email protected]>
 */

#include "au0828.h"

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/io.h>

#include "media/tuner.h"
#include <media/v4l2-common.h>

static int i2c_scan;
module_param(i2c_scan, int, 0444);
MODULE_PARM_DESC(…) …;

#define I2C_WAIT_DELAY …
#define I2C_WAIT_RETRY …

static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
{ … }

static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
{ … }

static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
{ … }

static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
{ … }

static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
{ … }

static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
{ … }

static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
{ … }

static int i2c_wait_done(struct i2c_adapter *i2c_adap)
{ … }

/* FIXME: Implement join handling correctly */
static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
	const struct i2c_msg *msg, int joined_rlen)
{ … }

/* FIXME: Implement join handling correctly */
static int i2c_readbytes(struct i2c_adapter *i2c_adap,
	const struct i2c_msg *msg, int joined)
{ … }

static int i2c_xfer(struct i2c_adapter *i2c_adap,
		    struct i2c_msg *msgs, int num)
{ … }

static u32 au0828_functionality(struct i2c_adapter *adap)
{ … }

static const struct i2c_algorithm au0828_i2c_algo_template = …;

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

static const struct i2c_adapter au0828_i2c_adap_template = …;

static const struct i2c_client au0828_i2c_client_template = …;

static char *i2c_devs[128] = …;

static void do_i2c_scan(char *name, struct i2c_client *c)
{ … }

/* init + register i2c adapter */
int au0828_i2c_register(struct au0828_dev *dev)
{ … }

int au0828_i2c_unregister(struct au0828_dev *dev)
{ … }