- 根目录:
- drivers
- media
- tuners
- mt20xx.c
/*
* 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 0x04
#define MT2030 0x06
#define MT2040 0x07
#define MT2050 0x42
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 int microtune_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
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]=0x86; // LOGC
buf[3]=0x0f; //reserved
buf[4]=0x1f;
buf[5]=(lo2n-1) | (lo2a<<5);
if(rfin >400*1000*1000)
buf[6]=0xe4;
else
buf[6]=0xf4; // set PKEN per rev 1.2
buf[7]=8+xogc;
buf[8]=0xc3; //reserved
buf[9]=0x4e; //reserved
buf[10]=0xec; //reserved
buf[11]=(lo2num&0xff);
buf[12]=(lo2num>>8) |0x80; // 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]=0x0e;
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] &0x06;
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]=0x0f;
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]&0x07;
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]=0x0f;
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]=0x80 +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]=0x20; // 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 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]=0xff;
buf[3]=0x0f;
buf[4]=0x1f;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4);
buf[5]=6; // Index register 6
buf[6]=0xe4;
buf[7]=0x8f;
buf[8]=0xc3;
buf[9]=0x4e;
buf[10]=0xec;
ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6);
buf[12]=13; // Index register 13
buf[13]=0x32;
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&0x07);
mdelay(10);
buf[0]=0x0e;
tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
xok=buf[0]&0x01;
tuner_dbg("mt2032: xok = 0x%02x\n",xok);
if (xok == 1) break;
xogc--;
tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
if (xogc == 3) {
xogc=4; // min. 4 per spec
break;
}
buf[0]=0x07;
buf[1]=0x88 + 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 ? 0x11 : 0x10;
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]|0x80;
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]|0x40;
if (debug > 1) {
int i;
tuner_dbg("bufs is: ");
for(i=0;i<6;i++)
printk("%x ",buf[i]);
printk("\n");
}
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 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] = 0x10;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */
buf[0] = 0x0f;
buf[1] = 0x0f;
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */
buf[0] = 0x0d;
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) {
int i;
tuner_dbg("MT20xx hexdump:");
for(i=0;i<21;i++) {
printk(" %02x",buf[i]);
if(((i+1)%8)==0) printk(" ");
}
printk("\n");
}
company_code = buf[0x11] << 8 | buf[0x12];
tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
company_code,buf[0x13],buf[0x14]);
if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
NULL != microtune_part[buf[0x13]])
name = microtune_part[buf[0x13]];
switch (buf[0x13]) {
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;
}
strlcpy(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");
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/