linux/drivers/media/pci/zoran/zr36016.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Zoran ZR36016 basic configuration functions
 *
 * Copyright (C) 2001 Wolfgang Scherr <[email protected]>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>

/* headerfile of this module */
#include "zr36016.h"

/* codec io API */
#include "videocodec.h"

/*
 * it doesn't make sense to have more than 20 or so,
 * just to prevent some unwanted loops
 */
#define MAX_CODECS …

/* amount of chips attached via this driver */
static int zr36016_codecs;

/*
 * Local hardware I/O functions: read/write via codec layer
 * (registers are located in the master device)
 */

/* read and write functions */
static u8 zr36016_read(struct zr36016 *ptr, u16 reg)
{ … }

static void zr36016_write(struct zr36016 *ptr, u16 reg, u8 value)
{ … }

/*
 * indirect read and write functions
 *
 * the 016 supports auto-addr-increment, but
 * writing it all time cost not much and is safer...
 */
static u8 zr36016_readi(struct zr36016 *ptr, u16 reg)
{ … }

static void zr36016_writei(struct zr36016 *ptr, u16 reg, u8 value)
{ … }

/* Local helper function: version read */

/* version kept in datastructure */
static u8 zr36016_read_version(struct zr36016 *ptr)
{ … }

/*
 * Local helper function: basic test of "connectivity", writes/reads
 * to/from PAX-Lo register
 */

static int zr36016_basic_test(struct zr36016 *ptr)
{ … }

/* Basic datasets & init */

static void zr36016_init(struct zr36016 *ptr)
{ … }

/*
 * CODEC API FUNCTIONS
 *
 * These functions are accessed by the master via the API structure
 */

/*
 * set compression/expansion mode and launches codec -
 * this should be the last call from the master before starting processing
 */
static int zr36016_set_mode(struct videocodec *codec, int mode)
{ … }

/* set picture size */
static int zr36016_set_video(struct videocodec *codec, const struct tvnorm *norm,
			     struct vfe_settings *cap, struct vfe_polarity *pol)
{ … }

/* additional control functions */
static int zr36016_control(struct videocodec *codec, int type, int size, void *data)
{ … }

/*
 * Exit and unregister function:
 *
 * Deinitializes Zoran's JPEG processor
 */

static int zr36016_unset(struct videocodec *codec)
{ … }

/*
 * Setup and registry function:
 *
 * Initializes Zoran's JPEG processor
 *
 * Also sets pixel size, average code size, mode (compr./decompr.)
 * (the given size is determined by the processor with the video interface)
 */

static int zr36016_setup(struct videocodec *codec)
{ … }

static const struct videocodec zr36016_codec = …;

/* HOOK IN DRIVER AS KERNEL MODULE */

int zr36016_init_module(void)
{ … }

void zr36016_cleanup_module(void)
{ … }