linux/drivers/media/i2c/sony-btf-mpx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <linux/slab.h>

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

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(…) …;

/* #define MPX_DEBUG */

/*
 * Note:
 *
 * AS(IF/MPX) pin:      LOW      HIGH/OPEN
 * IF/MPX address:   0x42/0x40   0x43/0x44
 */


static int force_mpx_mode = …;
module_param(force_mpx_mode, int, 0644);

struct sony_btf_mpx { … };

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

static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
{ … }

/*
 * MPX register values for the BTF-PG472Z:
 *
 *                                 FM_     NICAM_  SCART_
 *          MODUS  SOURCE    ACB   PRESCAL PRESCAL PRESCAL SYSTEM  VOLUME
 *         10/0030 12/0008 12/0013 12/000E 12/0010 12/0000 10/0020 12/0000
 *         ---------------------------------------------------------------
 * Auto     1003    0020    0100    2603    5000    XXXX    0001    7500
 *
 * B/G
 *  Mono    1003    0020    0100    2603    5000    XXXX    0003    7500
 *  A2      1003    0020    0100    2601    5000    XXXX    0003    7500
 *  NICAM   1003    0120    0100    2603    5000    XXXX    0008    7500
 *
 * I
 *  Mono    1003    0020    0100    2603    7900    XXXX    000A    7500
 *  NICAM   1003    0120    0100    2603    7900    XXXX    000A    7500
 *
 * D/K
 *  Mono    1003    0020    0100    2603    5000    XXXX    0004    7500
 *  A2-1    1003    0020    0100    2601    5000    XXXX    0004    7500
 *  A2-2    1003    0020    0100    2601    5000    XXXX    0005    7500
 *  A2-3    1003    0020    0100    2601    5000    XXXX    0007    7500
 *  NICAM   1003    0120    0100    2603    5000    XXXX    000B    7500
 *
 * L/L'
 *  Mono    0003    0200    0100    7C03    5000    2200    0009    7500
 *  NICAM   0003    0120    0100    7C03    5000    XXXX    0009    7500
 *
 * M
 *  Mono    1003    0200    0100    2B03    5000    2B00    0002    7500
 *
 * For Asia, replace the 0x26XX in FM_PRESCALE with 0x14XX.
 *
 * Bilingual selection in A2/NICAM:
 *
 *         High byte of SOURCE     Left chan   Right chan
 *                 0x01              MAIN         SUB
 *                 0x03              MAIN         MAIN
 *                 0x04              SUB          SUB
 *
 * Force mono in NICAM by setting the high byte of SOURCE to 0x02 (L/L') or
 * 0x00 (all other bands).  Force mono in A2 with FMONO_A2:
 *
 *                      FMONO_A2
 *                      10/0022
 *                      --------
 *     Forced mono ON     07F0
 *     Forced mono OFF    0190
 */

static const struct { … } mpx_audio_modes[] = …;

#define MPX_NUM_MODES …

static int mpx_setup(struct sony_btf_mpx *t)
{ … }


static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{ … }

static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{ … }

static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
{ … }

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

static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = …;

static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = …;

static const struct v4l2_subdev_ops sony_btf_mpx_ops = …;

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

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

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

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

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

static struct i2c_driver sony_btf_mpx_driver = …;
module_i2c_driver(…) …;