// SPDX-License-Identifier: GPL-2.0-only
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include "tuner-i2c.h"
#include "tda9887.h"
/* Chips:
TDA9885 (PAL, NTSC)
TDA9886 (PAL, SECAM, NTSC)
TDA9887 (PAL, SECAM, NTSC, FM Radio)
Used as part of several tuners
*/
static int debug;
module_param(debug, int , 0644 );
MODULE_PARM_DESC(debug, "enable verbose debug messages" );
static DEFINE_MUTEX(tda9887_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);
struct tda9887_priv {
struct tuner_i2c_props i2c_props;
struct list_head hybrid_tuner_instance_list;
unsigned char data[4 ];
unsigned int config;
unsigned int mode;
unsigned int audmode;
v4l2_std_id std;
bool standby;
};
/* ---------------------------------------------------------------------- */
#define UNSET (-1 U)
struct tvnorm {
v4l2_std_id std;
char *name;
unsigned char b;
unsigned char c;
unsigned char e;
};
/* ---------------------------------------------------------------------- */
//
// TDA defines
//
//// first reg (b)
#define cVideoTrapBypassOFF 0 x00 // bit b0
#define cVideoTrapBypassON 0 x01 // bit b0
#define cAutoMuteFmInactive 0 x00 // bit b1
#define cAutoMuteFmActive 0 x02 // bit b1
#define cIntercarrier 0 x00 // bit b2
#define cQSS 0 x04 // bit b2
#define cPositiveAmTV 0 x00 // bit b3:4
#define cFmRadio 0 x08 // bit b3:4
#define cNegativeFmTV 0 x10 // bit b3:4
#define cForcedMuteAudioON 0 x20 // bit b5
#define cForcedMuteAudioOFF 0 x00 // bit b5
#define cOutputPort1Active 0 x00 // bit b6
#define cOutputPort1Inactive 0 x40 // bit b6
#define cOutputPort2Active 0 x00 // bit b7
#define cOutputPort2Inactive 0 x80 // bit b7
//// second reg (c)
#define cDeemphasisOFF 0 x00 // bit c5
#define cDeemphasisON 0 x20 // bit c5
#define cDeemphasis75 0 x00 // bit c6
#define cDeemphasis50 0 x40 // bit c6
#define cAudioGain0 0 x00 // bit c7
#define cAudioGain6 0 x80 // bit c7
#define cTopMask 0 x1f // bit c0:4
#define cTopDefault 0 x10 // bit c0:4
//// third reg (e)
#define cAudioIF_4_5 0 x00 // bit e0:1
#define cAudioIF_5_5 0 x01 // bit e0:1
#define cAudioIF_6_0 0 x02 // bit e0:1
#define cAudioIF_6_5 0 x03 // bit e0:1
#define cVideoIFMask 0 x1c // bit e2:4
/* Video IF selection in TV Mode (bit B3=0) */
#define cVideoIF_58_75 0 x00 // bit e2:4
#define cVideoIF_45_75 0 x04 // bit e2:4
#define cVideoIF_38_90 0 x08 // bit e2:4
#define cVideoIF_38_00 0 x0C // bit e2:4
#define cVideoIF_33_90 0 x10 // bit e2:4
#define cVideoIF_33_40 0 x14 // bit e2:4
#define cRadioIF_45_75 0 x18 // bit e2:4
#define cRadioIF_38_90 0 x1C // bit e2:4
/* IF1 selection in Radio Mode (bit B3=1) */
#define cRadioIF_33_30 0 x00 // bit e2,4 (also 0x10,0x14)
#define cRadioIF_41_30 0 x04 // bit e2,4
/* Output of AFC pin in radio mode when bit E7=1 */
#define cRadioAGC_SIF 0 x00 // bit e3
#define cRadioAGC_FM 0 x08 // bit e3
#define cTunerGainNormal 0 x00 // bit e5
#define cTunerGainLow 0 x20 // bit e5
#define cGating_18 0 x00 // bit e6
#define cGating_36 0 x40 // bit e6
#define cAgcOutON 0 x80 // bit e7
#define cAgcOutOFF 0 x00 // bit e7
/* ---------------------------------------------------------------------- */
static struct tvnorm tvnorms[] = {
{
.std = V4L2_STD_PAL_BG | V4L2_STD_PAL_H | V4L2_STD_PAL_N,
.name = "PAL-BGHN" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis50 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_5_5 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_PAL_I,
.name = "PAL-I" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis50 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_6_0 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_PAL_DK,
.name = "PAL-DK" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis50 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_6_5 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_PAL_M | V4L2_STD_PAL_Nc,
.name = "PAL-M/Nc" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis75 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_4_5 |
cVideoIF_45_75 ),
},{
.std = V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H,
.name = "SECAM-BGH" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cTopDefault),
.e = ( cAudioIF_5_5 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_SECAM_L,
.name = "SECAM-L" ,
.b = ( cPositiveAmTV |
cQSS ),
.c = ( cTopDefault),
.e = ( cGating_36 |
cAudioIF_6_5 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_SECAM_LC,
.name = "SECAM-L'" ,
.b = ( cOutputPort2Inactive |
cPositiveAmTV |
cQSS ),
.c = ( cTopDefault),
.e = ( cGating_36 |
cAudioIF_6_5 |
cVideoIF_33_90 ),
},{
.std = V4L2_STD_SECAM_DK,
.name = "SECAM-DK" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis50 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_6_5 |
cVideoIF_38_90 ),
},{
.std = V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR,
.name = "NTSC-M" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis75 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_4_5 |
cVideoIF_45_75 ),
},{
.std = V4L2_STD_NTSC_M_JP,
.name = "NTSC-M-JP" ,
.b = ( cNegativeFmTV |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis50 |
cTopDefault),
.e = ( cGating_36 |
cAudioIF_4_5 |
cVideoIF_58_75 ),
}
};
static struct tvnorm radio_stereo = {
.name = "Radio Stereo" ,
.b = ( cFmRadio |
cQSS ),
.c = ( cDeemphasisOFF |
cAudioGain6 |
cTopDefault),
.e = ( cTunerGainLow |
cAudioIF_5_5 |
cRadioIF_38_90 ),
};
static struct tvnorm radio_mono = {
.name = "Radio Mono" ,
.b = ( cFmRadio |
cQSS ),
.c = ( cDeemphasisON |
cDeemphasis75 |
cTopDefault),
.e = ( cTunerGainLow |
cAudioIF_5_5 |
cRadioIF_38_90 ),
};
/* ---------------------------------------------------------------------- */
static void dump_read_message(struct dvb_frontend *fe, unsigned char *buf)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
static char *afc[16 ] = {
"- 12.5 kHz" ,
"- 37.5 kHz" ,
"- 62.5 kHz" ,
"- 87.5 kHz" ,
"-112.5 kHz" ,
"-137.5 kHz" ,
"-162.5 kHz" ,
"-187.5 kHz [min]" ,
"+187.5 kHz [max]" ,
"+162.5 kHz" ,
"+137.5 kHz" ,
"+112.5 kHz" ,
"+ 87.5 kHz" ,
"+ 62.5 kHz" ,
"+ 37.5 kHz" ,
"+ 12.5 kHz" ,
};
tuner_info("read: 0x%2x\n" , buf[0 ]);
tuner_info(" after power on : %s\n" , (buf[0 ] & 0 x01) ? "yes" : "no" );
tuner_info(" afc : %s\n" , afc[(buf[0 ] >> 1 ) & 0 x0f]);
tuner_info(" fmif level : %s\n" , (buf[0 ] & 0 x20) ? "high" : "low" );
tuner_info(" afc window : %s\n" , (buf[0 ] & 0 x40) ? "in" : "out" );
tuner_info(" vfi level : %s\n" , (buf[0 ] & 0 x80) ? "high" : "low" );
}
static void dump_write_message(struct dvb_frontend *fe, unsigned char *buf)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
static char *sound[4 ] = {
"AM/TV" ,
"FM/radio" ,
"FM/TV" ,
"FM/radio"
};
static char *adjust[32 ] = {
"-16" , "-15" , "-14" , "-13" , "-12" , "-11" , "-10" , "-9" ,
"-8" , "-7" , "-6" , "-5" , "-4" , "-3" , "-2" , "-1" ,
"0" , "+1" , "+2" , "+3" , "+4" , "+5" , "+6" , "+7" ,
"+8" , "+9" , "+10" , "+11" , "+12" , "+13" , "+14" , "+15"
};
static char *deemph[4 ] = {
"no" , "no" , "75" , "50"
};
static char *carrier[4 ] = {
"4.5 MHz" ,
"5.5 MHz" ,
"6.0 MHz" ,
"6.5 MHz / AM"
};
static char *vif[8 ] = {
"58.75 MHz" ,
"45.75 MHz" ,
"38.9 MHz" ,
"38.0 MHz" ,
"33.9 MHz" ,
"33.4 MHz" ,
"45.75 MHz + pin13" ,
"38.9 MHz + pin13" ,
};
static char *rif[4 ] = {
"44 MHz" ,
"52 MHz" ,
"52 MHz" ,
"44 MHz" ,
};
tuner_info("write: byte B 0x%02x\n" , buf[1 ]);
tuner_info(" B0 video mode : %s\n" ,
(buf[1 ] & 0 x01) ? "video trap" : "sound trap" );
tuner_info(" B1 auto mute fm : %s\n" ,
(buf[1 ] & 0 x02) ? "yes" : "no" );
tuner_info(" B2 carrier mode : %s\n" ,
(buf[1 ] & 0 x04) ? "QSS" : "Intercarrier" );
tuner_info(" B3-4 tv sound/radio : %s\n" ,
sound[(buf[1 ] & 0 x18) >> 3 ]);
tuner_info(" B5 force mute audio: %s\n" ,
(buf[1 ] & 0 x20) ? "yes" : "no" );
tuner_info(" B6 output port 1 : %s\n" ,
(buf[1 ] & 0 x40) ? "high (inactive)" : "low (active)" );
tuner_info(" B7 output port 2 : %s\n" ,
(buf[1 ] & 0 x80) ? "high (inactive)" : "low (active)" );
tuner_info("write: byte C 0x%02x\n" , buf[2 ]);
tuner_info(" C0-4 top adjustment : %s dB\n" ,
adjust[buf[2 ] & 0 x1f]);
tuner_info(" C5-6 de-emphasis : %s\n" ,
deemph[(buf[2 ] & 0 x60) >> 5 ]);
tuner_info(" C7 audio gain : %s\n" ,
(buf[2 ] & 0 x80) ? "-6" : "0" );
tuner_info("write: byte E 0x%02x\n" , buf[3 ]);
tuner_info(" E0-1 sound carrier : %s\n" ,
carrier[(buf[3 ] & 0 x03)]);
tuner_info(" E6 l pll gating : %s\n" ,
(buf[3 ] & 0 x40) ? "36" : "13" );
if (buf[1 ] & 0 x08) {
/* radio */
tuner_info(" E2-4 video if : %s\n" ,
rif[(buf[3 ] & 0 x0c) >> 2 ]);
tuner_info(" E7 vif agc output : %s\n" ,
(buf[3 ] & 0 x80)
? ((buf[3 ] & 0 x10) ? "fm-agc radio" :
"sif-agc radio" )
: "fm radio carrier afc" );
} else {
/* video */
tuner_info(" E2-4 video if : %s\n" ,
vif[(buf[3 ] & 0 x1c) >> 2 ]);
tuner_info(" E5 tuner gain : %s\n" ,
(buf[3 ] & 0 x80)
? ((buf[3 ] & 0 x20) ? "external" : "normal" )
: ((buf[3 ] & 0 x20) ? "minimum" : "normal" ));
tuner_info(" E7 vif agc output : %s\n" ,
(buf[3 ] & 0 x80) ? ((buf[3 ] & 0 x20)
? "pin3 port, pin22 vif agc out"
: "pin22 port, pin3 vif acg ext in" )
: "pin3+pin22 port" );
}
tuner_info("--\n" );
}
/* ---------------------------------------------------------------------- */
static int tda9887_set_tvnorm(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
struct tvnorm *norm = NULL;
char *buf = priv->data;
int i;
if (priv->mode == V4L2_TUNER_RADIO) {
if (priv->audmode == V4L2_TUNER_MODE_MONO)
norm = &radio_mono;
else
norm = &radio_stereo;
} else {
for (i = 0 ; i < ARRAY_SIZE(tvnorms); i++) {
if (tvnorms[i].std & priv->std) {
norm = tvnorms+i;
break ;
}
}
}
if (NULL == norm) {
tuner_dbg("Unsupported tvnorm entry - audio muted\n" );
return -1 ;
}
tuner_dbg("configure for: %s\n" , norm->name);
buf[1 ] = norm->b;
buf[2 ] = norm->c;
buf[3 ] = norm->e;
return 0 ;
}
static unsigned int port1 = UNSET;
static unsigned int port2 = UNSET;
static unsigned int qss = UNSET;
static unsigned int adjust = UNSET;
module_param(port1, int , 0644 );
module_param(port2, int , 0644 );
module_param(qss, int , 0644 );
module_param(adjust, int , 0644 );
static int tda9887_set_insmod(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
char *buf = priv->data;
if (UNSET != port1) {
if (port1)
buf[1 ] |= cOutputPort1Inactive;
else
buf[1 ] &= ~cOutputPort1Inactive;
}
if (UNSET != port2) {
if (port2)
buf[1 ] |= cOutputPort2Inactive;
else
buf[1 ] &= ~cOutputPort2Inactive;
}
if (UNSET != qss) {
if (qss)
buf[1 ] |= cQSS;
else
buf[1 ] &= ~cQSS;
}
if (adjust < 0 x20) {
buf[2 ] &= ~cTopMask;
buf[2 ] |= adjust;
}
return 0 ;
}
static int tda9887_do_config(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
char *buf = priv->data;
if (priv->config & TDA9887_PORT1_ACTIVE)
buf[1 ] &= ~cOutputPort1Inactive;
if (priv->config & TDA9887_PORT1_INACTIVE)
buf[1 ] |= cOutputPort1Inactive;
if (priv->config & TDA9887_PORT2_ACTIVE)
buf[1 ] &= ~cOutputPort2Inactive;
if (priv->config & TDA9887_PORT2_INACTIVE)
buf[1 ] |= cOutputPort2Inactive;
if (priv->config & TDA9887_QSS)
buf[1 ] |= cQSS;
if (priv->config & TDA9887_INTERCARRIER)
buf[1 ] &= ~cQSS;
if (priv->config & TDA9887_AUTOMUTE)
buf[1 ] |= cAutoMuteFmActive;
if (priv->config & TDA9887_DEEMPHASIS_MASK) {
buf[2 ] &= ~0 x60;
switch (priv->config & TDA9887_DEEMPHASIS_MASK) {
case TDA9887_DEEMPHASIS_NONE:
buf[2 ] |= cDeemphasisOFF;
break ;
case TDA9887_DEEMPHASIS_50:
buf[2 ] |= cDeemphasisON | cDeemphasis50;
break ;
case TDA9887_DEEMPHASIS_75:
buf[2 ] |= cDeemphasisON | cDeemphasis75;
break ;
}
}
if (priv->config & TDA9887_TOP_SET) {
buf[2 ] &= ~cTopMask;
buf[2 ] |= (priv->config >> 8 ) & cTopMask;
}
if ((priv->config & TDA9887_INTERCARRIER_NTSC) &&
(priv->std & V4L2_STD_NTSC))
buf[1 ] &= ~cQSS;
if (priv->config & TDA9887_GATING_18)
buf[3 ] &= ~cGating_36;
if (priv->mode == V4L2_TUNER_RADIO) {
if (priv->config & TDA9887_RIF_41_3) {
buf[3 ] &= ~cVideoIFMask;
buf[3 ] |= cRadioIF_41_30;
}
if (priv->config & TDA9887_GAIN_NORMAL)
buf[3 ] &= ~cTunerGainLow;
}
return 0 ;
}
/* ---------------------------------------------------------------------- */
static int tda9887_status(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
unsigned char buf[1 ];
int rc;
rc = tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1 );
if (rc != 1 )
tuner_info("i2c i/o error: rc == %d (should be 1)\n" , rc);
dump_read_message(fe, buf);
return 0 ;
}
static void tda9887_configure(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
int rc;
memset(priv->data,0 ,sizeof (priv->data));
tda9887_set_tvnorm(fe);
/* A note on the port settings:
These settings tend to depend on the specifics of the board.
By default they are set to inactive (bit value 1) by this driver,
overwriting any changes made by the tvnorm. This means that it
is the responsibility of the module using the tda9887 to set
these values in case of changes in the tvnorm.
In many cases port 2 should be made active (0) when selecting
SECAM-L, and port 2 should remain inactive (1) for SECAM-L'.
For the other standards the tda9887 application note says that
the ports should be set to active (0), but, again, that may
differ depending on the precise hardware configuration.
*/
priv->data[1 ] |= cOutputPort1Inactive;
priv->data[1 ] |= cOutputPort2Inactive;
tda9887_do_config(fe);
tda9887_set_insmod(fe);
if (priv->standby)
priv->data[1 ] |= cForcedMuteAudioON;
tuner_dbg("writing: b=0x%02x c=0x%02x e=0x%02x\n" ,
priv->data[1 ], priv->data[2 ], priv->data[3 ]);
if (debug > 1 )
dump_write_message(fe, priv->data);
if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,priv->data,4 )))
tuner_info("i2c i/o error: rc == %d (should be 4)\n" , rc);
if (debug > 2 ) {
msleep_interruptible(1000 );
tda9887_status(fe);
}
}
/* ---------------------------------------------------------------------- */
static void tda9887_tuner_status(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
tuner_info("Data bytes: b=0x%02x c=0x%02x e=0x%02x\n" ,
priv->data[1 ], priv->data[2 ], priv->data[3 ]);
}
static int tda9887_get_afc(struct dvb_frontend *fe, s32 *afc)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
static const int AFC_BITS_2_kHz[] = {
-12500 , -37500 , -62500 , -97500 ,
-112500 , -137500 , -162500 , -187500 ,
187500 , 162500 , 137500 , 112500 ,
97500 , 62500 , 37500 , 12500
};
__u8 reg = 0 ;
if (priv->mode != V4L2_TUNER_RADIO)
return 0 ;
if (1 == tuner_i2c_xfer_recv(&priv->i2c_props, ®, 1 ))
*afc = AFC_BITS_2_kHz[(reg >> 1 ) & 0 x0f];
return 0 ;
}
static void tda9887_standby(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
priv->standby = true ;
tda9887_configure(fe);
}
static void tda9887_set_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
priv->standby = false ;
priv->mode = params->mode;
priv->audmode = params->audmode;
priv->std = params->std;
tda9887_configure(fe);
}
static int tda9887_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
priv->config = *(unsigned int *)priv_cfg;
tda9887_configure(fe);
return 0 ;
}
static void tda9887_release(struct dvb_frontend *fe)
{
struct tda9887_priv *priv = fe->analog_demod_priv;
mutex_lock(&tda9887_list_mutex);
if (priv)
hybrid_tuner_release_state(priv);
mutex_unlock(&tda9887_list_mutex);
fe->analog_demod_priv = NULL;
}
static const struct analog_demod_ops tda9887_ops = {
.info = {
.name = "tda9887" ,
},
.set_params = tda9887_set_params,
.standby = tda9887_standby,
.tuner_status = tda9887_tuner_status,
.get_afc = tda9887_get_afc,
.release = tda9887_release,
.set_config = tda9887_set_config,
};
struct dvb_frontend *tda9887_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c_adap,
u8 i2c_addr)
{
struct tda9887_priv *priv = NULL;
int instance;
mutex_lock(&tda9887_list_mutex);
instance = hybrid_tuner_request_state(struct tda9887_priv, priv,
hybrid_tuner_instance_list,
i2c_adap, i2c_addr, "tda9887" );
switch (instance) {
case 0 :
mutex_unlock(&tda9887_list_mutex);
return NULL;
case 1 :
fe->analog_demod_priv = priv;
priv->standby = true ;
tuner_info("tda988[5/6/7] found\n" );
break ;
default :
fe->analog_demod_priv = priv;
break ;
}
mutex_unlock(&tda9887_list_mutex);
memcpy(&fe->ops.analog_ops, &tda9887_ops,
sizeof (struct analog_demod_ops));
return fe;
}
EXPORT_SYMBOL_GPL(tda9887_attach);
MODULE_DESCRIPTION("NXP TDA9885/6/7 analog IF demodulator driver" );
MODULE_LICENSE("GPL" );
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(vorverarbeitet am 2026-06-08)
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