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// 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("sony-btf-mpx driver");
MODULE_LICENSE("GPL v2");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level 0=off(default) 1=on");
/* #define MPX_DEBUG */
/*
* Note:
*
* AS(IF/MPX) pin: LOW HIGH/OPEN
* IF/MPX address: 0x42/0x40 0x43/0x44
*/
static int force_mpx_mode = -1;
module_param(force_mpx_mode, int, 0644);
struct sony_btf_mpx {
struct v4l2_subdev sd;
int mpxmode;
u32 audmode;
};
static inline struct sony_btf_mpx *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct sony_btf_mpx, sd);
}
static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
{
u8 buffer[5];
struct i2c_msg msg;
buffer[0] = dev;
buffer[1] = addr >> 8;
buffer[2] = addr & 0xff;
buffer[3] = val >> 8;
buffer[4] = val & 0xff;
msg.addr = client->addr;
msg.flags = 0;
msg.len = 5;
msg.buf = buffer;
i2c_transfer(client->adapter, &msg, 1);
return 0;
}
/*
* 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 {
enum { AUD_MONO, AUD_A2, AUD_NICAM, AUD_NICAM_L } audio_mode;
u16 modus;
u16 source;
u16 acb;
u16 fm_prescale;
u16 nicam_prescale;
u16 scart_prescale;
u16 system;
u16 volume;
} mpx_audio_modes[] = {
/* Auto */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0001, 0x7500 },
/* B/G Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0003, 0x7500 },
/* B/G A2 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0003, 0x7500 },
/* B/G NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x5000, 0x0000, 0x0008, 0x7500 },
/* I Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x7900, 0x0000, 0x000A, 0x7500 },
/* I NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x7900, 0x0000, 0x000A, 0x7500 },
/* D/K Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0004, 0x7500 },
/* D/K A2-1 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0004, 0x7500 },
/* D/K A2-2 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0005, 0x7500 },
/* D/K A2-3 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0007, 0x7500 },
/* D/K NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x5000, 0x0000, 0x000B, 0x7500 },
/* L/L' Mono */ { AUD_MONO, 0x0003, 0x0200, 0x0100, 0x7C03,
0x5000, 0x2200, 0x0009, 0x7500 },
/* L/L' NICAM */{ AUD_NICAM_L, 0x0003, 0x0120, 0x0100, 0x7C03,
0x5000, 0x0000, 0x0009, 0x7500 },
};
#define MPX_NUM_MODES ARRAY_SIZE(mpx_audio_modes)
static int mpx_setup(struct sony_btf_mpx *t)
{
struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
u16 source = 0;
u8 buffer[3];
struct i2c_msg msg;
int mode = t->mpxmode;
/* reset MPX */
buffer[0] = 0x00;
buffer[1] = 0x80;
buffer[2] = 0x00;
msg.addr = client->addr;
msg.flags = 0;
msg.len = 3;
msg.buf = buffer;
i2c_transfer(client->adapter, &msg, 1);
buffer[1] = 0x00;
i2c_transfer(client->adapter, &msg, 1);
if (t->audmode != V4L2_TUNER_MODE_MONO)
mode++;
if (mpx_audio_modes[mode].audio_mode != AUD_MONO) {
switch (t->audmode) {
case V4L2_TUNER_MODE_MONO:
switch (mpx_audio_modes[mode].audio_mode) {
case AUD_A2:
source = mpx_audio_modes[mode].source;
break;
case AUD_NICAM:
source = 0x0000;
break;
case AUD_NICAM_L:
source = 0x0200;
break;
default:
break;
}
break;
case V4L2_TUNER_MODE_STEREO:
source = mpx_audio_modes[mode].source;
break;
case V4L2_TUNER_MODE_LANG1:
source = 0x0300;
break;
case V4L2_TUNER_MODE_LANG2:
source = 0x0400;
break;
}
source |= mpx_audio_modes[mode].source & 0x00ff;
} else
source = mpx_audio_modes[mode].source;
mpx_write(client, 0x10, 0x0030, mpx_audio_modes[mode].modus);
mpx_write(client, 0x12, 0x0008, source);
mpx_write(client, 0x12, 0x0013, mpx_audio_modes[mode].acb);
mpx_write(client, 0x12, 0x000e,
mpx_audio_modes[mode].fm_prescale);
mpx_write(client, 0x12, 0x0010,
mpx_audio_modes[mode].nicam_prescale);
mpx_write(client, 0x12, 0x000d,
mpx_audio_modes[mode].scart_prescale);
mpx_write(client, 0x10, 0x0020, mpx_audio_modes[mode].system);
mpx_write(client, 0x12, 0x0000, mpx_audio_modes[mode].volume);
if (mpx_audio_modes[mode].audio_mode == AUD_A2)
mpx_write(client, 0x10, 0x0022,
t->audmode == V4L2_TUNER_MODE_MONO ? 0x07f0 : 0x0190);
#ifdef MPX_DEBUG
{
u8 buf1[3], buf2[2];
struct i2c_msg msgs[2];
v4l2_info(client,
"MPX registers: %04x %04x %04x %04x %04x %04x %04x %04x\n",
mpx_audio_modes[mode].modus,
source,
mpx_audio_modes[mode].acb,
mpx_audio_modes[mode].fm_prescale,
mpx_audio_modes[mode].nicam_prescale,
mpx_audio_modes[mode].scart_prescale,
mpx_audio_modes[mode].system,
mpx_audio_modes[mode].volume);
buf1[0] = 0x11;
buf1[1] = 0x00;
buf1[2] = 0x7e;
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 3;
msgs[0].buf = buf1;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = 2;
msgs[1].buf = buf2;
i2c_transfer(client->adapter, msgs, 2);
v4l2_info(client, "MPX system: %02x%02x\n",
buf2[0], buf2[1]);
buf1[0] = 0x11;
buf1[1] = 0x02;
buf1[2] = 0x00;
i2c_transfer(client->adapter, msgs, 2);
v4l2_info(client, "MPX status: %02x%02x\n",
buf2[0], buf2[1]);
}
#endif
return 0;
}
static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct sony_btf_mpx *t = to_state(sd);
int default_mpx_mode = 0;
if (std & V4L2_STD_PAL_BG)
default_mpx_mode = 1;
else if (std & V4L2_STD_PAL_I)
default_mpx_mode = 4;
else if (std & V4L2_STD_PAL_DK)
default_mpx_mode = 6;
else if (std & V4L2_STD_SECAM_L)
default_mpx_mode = 11;
if (default_mpx_mode != t->mpxmode) {
t->mpxmode = default_mpx_mode;
mpx_setup(t);
}
return 0;
}
static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct sony_btf_mpx *t = to_state(sd);
vt->capability = V4L2_TUNER_CAP_NORM |
V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
V4L2_TUNER_CAP_LANG2;
vt->rxsubchans = V4L2_TUNER_SUB_MONO |
V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_LANG1 |
V4L2_TUNER_SUB_LANG2;
vt->audmode = t->audmode;
return 0;
}
static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
{
struct sony_btf_mpx *t = to_state(sd);
if (vt->type != V4L2_TUNER_ANALOG_TV)
return -EINVAL;
if (vt->audmode != t->audmode) {
t->audmode = vt->audmode;
mpx_setup(t);
}
return 0;
}
/* --------------------------------------------------------------------------*/
static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = {
.s_tuner = sony_btf_mpx_s_tuner,
.g_tuner = sony_btf_mpx_g_tuner,
};
static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = {
.s_std = sony_btf_mpx_s_std,
};
static const struct v4l2_subdev_ops sony_btf_mpx_ops = {
.tuner = &sony_btf_mpx_tuner_ops,
.video = &sony_btf_mpx_video_ops,
};
/* --------------------------------------------------------------------------*/
static int sony_btf_mpx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct sony_btf_mpx *t;
struct v4l2_subdev *sd;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
if (t == NULL)
return -ENOMEM;
sd = &t->sd;
v4l2_i2c_subdev_init(sd, client, &sony_btf_mpx_ops);
/* Initialize sony_btf_mpx */
t->mpxmode = 0;
t->audmode = V4L2_TUNER_MODE_STEREO;
return 0;
}
static void sony_btf_mpx_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id sony_btf_mpx_id[] = {
{ "sony-btf-mpx", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sony_btf_mpx_id);
static struct i2c_driver sony_btf_mpx_driver = {
.driver = {
.name = "sony-btf-mpx",
},
.probe = sony_btf_mpx_probe,
.remove = sony_btf_mpx_remove,
.id_table = sony_btf_mpx_id,
};
module_i2c_driver(sony_btf_mpx_driver);
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