// SPDX-License-Identifier: GPL-2.0-only
/*
* i2c tv tuner chip device driver
* controls microtune tuners, mt2032 + mt2050 at the moment.
*
* This "mt20xx" module was split apart from the original "tuner" module.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include "tuner-i2c.h"
#include "mt20xx.h"
static int debug;
module_param(debug, int , 0644 );
MODULE_PARM_DESC(debug, "enable verbose debug messages" );
/* ---------------------------------------------------------------------- */
static unsigned int optimize_vco = 1 ;
module_param(optimize_vco, int , 0644 );
static unsigned int tv_antenna = 1 ;
module_param(tv_antenna, int , 0644 );
static unsigned int radio_antenna;
module_param(radio_antenna, int , 0644 );
/* ---------------------------------------------------------------------- */
#define MT2032 0 x04
#define MT2030 0 x06
#define MT2040 0 x07
#define MT2050 0 x42
static char *microtune_part[] = {
[ MT2030 ] = "MT2030" ,
[ MT2032 ] = "MT2032" ,
[ MT2040 ] = "MT2040" ,
[ MT2050 ] = "MT2050" ,
};
struct microtune_priv {
struct tuner_i2c_props i2c_props;
unsigned int xogc;
//unsigned int radio_if2;
u32 frequency;
};
static void microtune_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct microtune_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0 ;
}
// IsSpurInBand()?
static int mt2032_spurcheck(struct dvb_frontend *fe,
int f1, int f2, int spectrum_from,int spectrum_to)
{
struct microtune_priv *priv = fe->tuner_priv;
int n1=1 ,n2,f;
f1=f1/1000 ; //scale to kHz to avoid 32bit overflows
f2=f2/1000 ;
spectrum_from/=1000 ;
spectrum_to/=1000 ;
tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n" ,
f1,f2,spectrum_from,spectrum_to);
do {
n2=-n1;
f=n1*(f1-f2);
do {
n2--;
f=f-f2;
tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n" ,n1,n2,f);
if ( (f>spectrum_from) && (f<spectrum_to))
tuner_dbg("mt2032 spurcheck triggered: %d\n" ,n1);
} while ( (f>(f2-spectrum_to)) || (n2>-5 ));
n1++;
} while (n1<5 );
return 1 ;
}
static int mt2032_compute_freq(struct dvb_frontend *fe,
unsigned int rfin,
unsigned int if1, unsigned int if2,
unsigned int spectrum_from,
unsigned int spectrum_to,
unsigned char *buf,
int *ret_sel,
unsigned int xogc) //all in Hz
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
fref= 5250 *1000 ; //5.25MHz
desired_lo1=rfin+if1;
lo1=(2 *(desired_lo1/1000 )+(fref/1000 )) / (2 *fref/1000 );
lo1n=lo1/8 ;
lo1a=lo1-(lo1n*8 );
s=rfin/1000 /1000 +1090 ;
if (optimize_vco) {
if (s>1890 ) sel=0 ;
else if (s>1720 ) sel=1 ;
else if (s>1530 ) sel=2 ;
else if (s>1370 ) sel=3 ;
else sel=4 ; // >1090
}
else {
if (s>1790 ) sel=0 ; // <1958
else if (s>1617 ) sel=1 ;
else if (s>1449 ) sel=2 ;
else if (s>1291 ) sel=3 ;
else sel=4 ; // >1090
}
*ret_sel=sel;
lo1freq=(lo1a+8 *lo1n)*fref;
tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n" ,
rfin,lo1,lo1n,lo1a,sel,lo1freq);
desired_lo2=lo1freq-rfin-if2;
lo2=(desired_lo2)/fref;
lo2n=lo2/8 ;
lo2a=lo2-(lo2n*8 );
lo2num=((desired_lo2/1000 )%(fref/1000 ))* 3780 /(fref/1000 ); //scale to fit in 32bit arith
lo2freq=(lo2a+8 *lo2n)*fref + lo2num*(fref/1000 )/3780 *1000 ;
tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n" ,
rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 ||
lo2n > 30 ) {
tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n" ,
lo1a, lo1n, lo2a,lo2n);
return (-1 );
}
mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to);
// should recalculate lo1 (one step up/down)
// set up MT2032 register map for transfer over i2c
buf[0 ]=lo1n-1 ;
buf[1 ]=lo1a | (sel<<4 );
buf[2 ]=0 x86; // LOGC
buf[3 ]=0 x0f; //reserved
buf[4 ]=0 x1f;
buf[5 ]=(lo2n-1 ) | (lo2a<<5 );
if (rfin >400 *1000 *1000 )
buf[6 ]=0 xe4;
else
buf[6 ]=0 xf4; // set PKEN per rev 1.2
buf[7 ]=8 +xogc;
buf[8 ]=0 xc3; //reserved
buf[9 ]=0 x4e; //reserved
buf[10 ]=0 xec; //reserved
buf[11 ]=(lo2num&0 xff);
buf[12 ]=(lo2num>>8 ) |0 x80; // Lo2RST
return 0 ;
}
static int mt2032_check_lo_lock(struct dvb_frontend *fe)
{
struct microtune_priv *priv = fe->tuner_priv;
int try ,lock=0 ;
unsigned char buf[2 ];
for (try =0 ;try <10 ;try ++) {
buf[0 ]=0 x0e;
tuner_i2c_xfer_send(&priv->i2c_props,buf,1 );
tuner_i2c_xfer_recv(&priv->i2c_props,buf,1 );
tuner_dbg("mt2032 Reg.E=0x%02x\n" ,buf[0 ]);
lock=buf[0 ] &0 x06;
if (lock==6 )
break ;
tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n" ,buf[0 ]);
udelay(1000 );
}
return lock;
}
static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock)
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned char buf[2 ];
int tad1;
buf[0 ]=0 x0f;
tuner_i2c_xfer_send(&priv->i2c_props,buf,1 );
tuner_i2c_xfer_recv(&priv->i2c_props,buf,1 );
tuner_dbg("mt2032 Reg.F=0x%02x\n" ,buf[0 ]);
tad1=buf[0 ]&0 x07;
if (tad1 ==0 ) return lock;
if (tad1 ==1 ) return lock;
if (tad1==2 ) {
if (sel==0 )
return lock;
else sel--;
}
else {
if (sel<4 )
sel++;
else
return lock;
}
tuner_dbg("mt2032 optimize_vco: sel=%d\n" ,sel);
buf[0 ]=0 x0f;
buf[1 ]=sel;
tuner_i2c_xfer_send(&priv->i2c_props,buf,2 );
lock=mt2032_check_lo_lock(fe);
return lock;
}
static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin,
unsigned int if1, unsigned int if2,
unsigned int from, unsigned int to)
{
unsigned char buf[21 ];
int lint_try,ret,sel,lock=0 ;
struct microtune_priv *priv = fe->tuner_priv;
tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n" ,
rfin,if1,if2,from,to);
buf[0 ]=0 ;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1 );
tuner_i2c_xfer_recv(&priv->i2c_props,buf,21 );
buf[0 ]=0 ;
ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1 ],&sel,priv->xogc);
if (ret<0 )
return ;
// send only the relevant registers per Rev. 1.2
buf[0 ]=0 ;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4 );
buf[5 ]=5 ;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5 ,4 );
buf[11 ]=11 ;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11 ,3 );
if (ret!=3 )
tuner_warn("i2c i/o error: rc == %d (should be 3)\n" ,ret);
// wait for PLLs to lock (per manual), retry LINT if not.
for (lint_try=0 ; lint_try<2 ; lint_try++) {
lock=mt2032_check_lo_lock(fe);
if (optimize_vco)
lock=mt2032_optimize_vco(fe,sel,lock);
if (lock==6 ) break ;
tuner_dbg("mt2032: re-init PLLs by LINT\n" );
buf[0 ]=7 ;
buf[1 ]=0 x80 +8 +priv->xogc; // set LINT to re-init PLLs
tuner_i2c_xfer_send(&priv->i2c_props,buf,2 );
mdelay(10 );
buf[1 ]=8 +priv->xogc;
tuner_i2c_xfer_send(&priv->i2c_props,buf,2 );
}
if (lock!=6 )
tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n" );
buf[0 ]=2 ;
buf[1 ]=0 x20; // LOGC for optimal phase noise
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2 );
if (ret!=2 )
tuner_warn("i2c i/o error: rc == %d (should be 2)\n" ,ret);
}
static int mt2032_set_tv_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
int if2,from,to;
// signal bandwidth and picture carrier
if (params->std & V4L2_STD_525_60) {
// NTSC
from = 40750 *1000 ;
to = 46750 *1000 ;
if2 = 45750 *1000 ;
} else {
// PAL
from = 32900 *1000 ;
to = 39900 *1000 ;
if2 = 38900 *1000 ;
}
mt2032_set_if_freq(fe, params->frequency*62500 ,
1090 *1000 *1000 , if2, from, to);
return 0 ;
}
static int mt2032_set_radio_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct microtune_priv *priv = fe->tuner_priv;
int if2;
if (params->std & V4L2_STD_525_60) {
tuner_dbg("pinnacle ntsc\n" );
if2 = 41300 * 1000 ;
} else {
tuner_dbg("pinnacle pal\n" );
if2 = 33300 * 1000 ;
}
// per Manual for FM tuning: first if center freq. 1085 MHz
mt2032_set_if_freq(fe, params->frequency * 125 / 2 ,
1085 *1000 *1000 ,if2,if2,if2);
return 0 ;
}
static int mt2032_set_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct microtune_priv *priv = fe->tuner_priv;
int ret = -EINVAL;
switch (params->mode) {
case V4L2_TUNER_RADIO:
ret = mt2032_set_radio_freq(fe, params);
priv->frequency = params->frequency * 125 / 2 ;
break ;
case V4L2_TUNER_ANALOG_TV:
case V4L2_TUNER_DIGITAL_TV:
ret = mt2032_set_tv_freq(fe, params);
priv->frequency = params->frequency * 62500 ;
break ;
}
return ret;
}
static const struct dvb_tuner_ops mt2032_tuner_ops = {
.set_analog_params = mt2032_set_params,
.release = microtune_release,
.get_frequency = microtune_get_frequency,
};
// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
static int mt2032_init(struct dvb_frontend *fe)
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned char buf[21 ];
int ret,xogc,xok=0 ;
// Initialize Registers per spec.
buf[1 ]=2 ; // Index to register 2
buf[2 ]=0 xff;
buf[3 ]=0 x0f;
buf[4 ]=0 x1f;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1 ,4 );
buf[5 ]=6 ; // Index register 6
buf[6 ]=0 xe4;
buf[7 ]=0 x8f;
buf[8 ]=0 xc3;
buf[9 ]=0 x4e;
buf[10 ]=0 xec;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5 ,6 );
buf[12 ]=13 ; // Index register 13
buf[13 ]=0 x32;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12 ,2 );
// Adjust XOGC (register 7), wait for XOK
xogc=7 ;
do {
tuner_dbg("mt2032: xogc = 0x%02x\n" ,xogc&0 x07);
mdelay(10 );
buf[0 ]=0 x0e;
tuner_i2c_xfer_send(&priv->i2c_props,buf,1 );
tuner_i2c_xfer_recv(&priv->i2c_props,buf,1 );
xok=buf[0 ]&0 x01;
tuner_dbg("mt2032: xok = 0x%02x\n" ,xok);
if (xok == 1 ) break ;
xogc--;
tuner_dbg("mt2032: xogc = 0x%02x\n" ,xogc&0 x07);
if (xogc == 3 ) {
xogc=4 ; // min. 4 per spec
break ;
}
buf[0 ]=0 x07;
buf[1 ]=0 x88 + xogc;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2 );
if (ret!=2 )
tuner_warn("i2c i/o error: rc == %d (should be 2)\n" ,ret);
} while (xok != 1 );
priv->xogc=xogc;
memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof (struct dvb_tuner_ops));
return (1 );
}
static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna)
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned char buf[2 ];
buf[0 ] = 6 ;
buf[1 ] = antenna ? 0 x11 : 0 x10;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2 );
tuner_dbg("mt2050: enabled antenna connector %d\n" , antenna);
}
static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned int if1=1218 *1000 *1000 ;
unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
int ret;
unsigned char buf[6 ];
tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n" ,
freq,if1,if2);
f_lo1=freq+if1;
f_lo1=(f_lo1/1000000 )*1000000 ;
f_lo2=f_lo1-freq-if2;
f_lo2=(f_lo2/50000 )*50000 ;
lo1=f_lo1/4000000 ;
lo2=f_lo2/4000000 ;
f_lo1_modulo= f_lo1-(lo1*4000000 );
f_lo2_modulo= f_lo2-(lo2*4000000 );
num1=4 *f_lo1_modulo/4000000 ;
num2=4096 *(f_lo2_modulo/1000 )/4000 ;
// todo spurchecks
div1a=(lo1/12 )-1 ;
div1b=lo1-(div1a+1 )*12 ;
div2a=(lo2/8 )-1 ;
div2b=lo2-(div2a+1 )*8 ;
if (debug > 1 ) {
tuner_dbg("lo1 lo2 = %d %d\n" , lo1, lo2);
tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n" ,
num1,num2,div1a,div1b,div2a,div2b);
}
buf[0 ]=1 ;
buf[1 ]= 4 *div1b + num1;
if (freq<275 *1000 *1000 ) buf[1 ] = buf[1 ]|0 x80;
buf[2 ]=div1a;
buf[3 ]=32 *div2b + num2/256 ;
buf[4 ]=num2-(num2/256 )*256 ;
buf[5 ]=div2a;
if (num2!=0 ) buf[5 ]=buf[5 ]|0 x40;
if (debug > 1 )
tuner_dbg("bufs is: %*ph\n" , 6 , buf);
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6 );
if (ret!=6 )
tuner_warn("i2c i/o error: rc == %d (should be 6)\n" ,ret);
}
static int mt2050_set_tv_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
unsigned int if2;
if (params->std & V4L2_STD_525_60) {
// NTSC
if2 = 45750 *1000 ;
} else {
// PAL
if2 = 38900 *1000 ;
}
if (V4L2_TUNER_DIGITAL_TV == params->mode) {
// DVB (pinnacle 300i)
if2 = 36150 *1000 ;
}
mt2050_set_if_freq(fe, params->frequency*62500 , if2);
mt2050_set_antenna(fe, tv_antenna);
return 0 ;
}
static int mt2050_set_radio_freq(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct microtune_priv *priv = fe->tuner_priv;
int if2;
if (params->std & V4L2_STD_525_60) {
tuner_dbg("pinnacle ntsc\n" );
if2 = 41300 * 1000 ;
} else {
tuner_dbg("pinnacle pal\n" );
if2 = 33300 * 1000 ;
}
mt2050_set_if_freq(fe, params->frequency * 125 / 2 , if2);
mt2050_set_antenna(fe, radio_antenna);
return 0 ;
}
static int mt2050_set_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct microtune_priv *priv = fe->tuner_priv;
int ret = -EINVAL;
switch (params->mode) {
case V4L2_TUNER_RADIO:
ret = mt2050_set_radio_freq(fe, params);
priv->frequency = params->frequency * 125 / 2 ;
break ;
case V4L2_TUNER_ANALOG_TV:
case V4L2_TUNER_DIGITAL_TV:
ret = mt2050_set_tv_freq(fe, params);
priv->frequency = params->frequency * 62500 ;
break ;
}
return ret;
}
static const struct dvb_tuner_ops mt2050_tuner_ops = {
.set_analog_params = mt2050_set_params,
.release = microtune_release,
.get_frequency = microtune_get_frequency,
};
static int mt2050_init(struct dvb_frontend *fe)
{
struct microtune_priv *priv = fe->tuner_priv;
unsigned char buf[2 ];
buf[0 ] = 6 ;
buf[1 ] = 0 x10;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2 ); /* power */
buf[0 ] = 0 x0f;
buf[1 ] = 0 x0f;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2 ); /* m1lo */
buf[0 ] = 0 x0d;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 1 );
tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1 );
tuner_dbg("mt2050: sro is %x\n" , buf[0 ]);
memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof (struct dvb_tuner_ops));
return 0 ;
}
struct dvb_frontend *microtune_attach(struct dvb_frontend *fe,
struct i2c_adapter* i2c_adap,
u8 i2c_addr)
{
struct microtune_priv *priv = NULL;
char *name;
unsigned char buf[21 ];
int company_code;
priv = kzalloc(sizeof (struct microtune_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
fe->tuner_priv = priv;
priv->i2c_props.addr = i2c_addr;
priv->i2c_props.adap = i2c_adap;
priv->i2c_props.name = "mt20xx" ;
//priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
memset(buf,0 ,sizeof (buf));
name = "unknown" ;
tuner_i2c_xfer_send(&priv->i2c_props,buf,1 );
tuner_i2c_xfer_recv(&priv->i2c_props,buf,21 );
if (debug)
tuner_dbg("MT20xx hexdump: %*ph\n" , 21 , buf);
company_code = buf[0 x11] << 8 | buf[0 x12];
tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n" ,
company_code,buf[0 x13],buf[0 x14]);
if (buf[0 x13] < ARRAY_SIZE(microtune_part) &&
NULL != microtune_part[buf[0 x13]])
name = microtune_part[buf[0 x13]];
switch (buf[0 x13]) {
case MT2032:
mt2032_init(fe);
break ;
case MT2050:
mt2050_init(fe);
break ;
default :
tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n" ,
name);
return NULL;
}
strscpy(fe->ops.tuner_ops.info.name, name,
sizeof (fe->ops.tuner_ops.info.name));
tuner_info("microtune %s found, OK\n" ,name);
return fe;
}
EXPORT_SYMBOL_GPL(microtune_attach);
MODULE_DESCRIPTION("Microtune tuner driver" );
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer" );
MODULE_LICENSE("GPL" );
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