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linux-2.6/drivers/media/video/mt20xx.c
Hans Verkuil 27487d4471 V4L/DVB (3384): Separate tv & radio freqs, fix cb/freq transmit order for tuners that need this. 
- Moved MSP_SET_MATRIX to v4l2-common.h
- Fix typos and integer overflows in tea5767.c
- Split old freq field into a tv_freq and a radio_freq. Prevents
  that a radio tuner is initialized with a tv frequency or vice versa.
- When switching to radio mode initialize the tuner with the last
  used radio frequency (this was already done for the TV mode).
  As a result of these changes the tuner module now remembers the
  last set radio and TV frequencies, which is what you would expect
  to happen.
- Move out of range frequencies to the closest valid frequency as per
  v4l2 API spec.
- Fix incorrect initial radio frequency (multiplier is 16000, not 16)
- Add boundary check for out of range frequencies.
- Use new flag to check if the order of the CB and freq. depends on
  the last set frequency. That is needed for some tuners or you can
  get static as a result. The flag is added for those tuners where I know
  that the datasheet indicates that this is necessary.
- For this new check use the last set div value, not the last frequency
  as radio frequencies are always much higher due to the 16000 multiplier.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-01-15 21:25:32 -02:00

553 lines
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/*
*
* i2c tv tuner chip device driver
* controls microtune tuners, mt2032 + mt2050 at the moment.
*/
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <linux/moduleparam.h>
#include <media/tuner.h>
/* ---------------------------------------------------------------------- */
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 = 0;
module_param(radio_antenna, int, 0644);
/* from tuner-core.c */
extern int tuner_debug;
/* ---------------------------------------------------------------------- */
#define MT2032 0x04
#define MT2030 0x06
#define MT2040 0x07
#define MT2050 0x42
static char *microtune_part[] = {
[ MT2030 ] = "MT2030",
[ MT2032 ] = "MT2032",
[ MT2040 ] = "MT2040",
[ MT2050 ] = "MT2050",
};
// IsSpurInBand()?
static int mt2032_spurcheck(struct i2c_client *c,
int f1, int f2, int spectrum_from,int spectrum_to)
{
struct tuner *t = i2c_get_clientdata(c);
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 i2c_client *c,
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 tuner *t = i2c_get_clientdata(c);
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<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||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(c, 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 i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
int try,lock=0;
unsigned char buf[2];
for(try=0;try<10;try++) {
buf[0]=0x0e;
i2c_master_send(c,buf,1);
i2c_master_recv(c,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 i2c_client *c,int sel,int lock)
{
struct tuner *t = i2c_get_clientdata(c);
unsigned char buf[2];
int tad1;
buf[0]=0x0f;
i2c_master_send(c,buf,1);
i2c_master_recv(c,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;
i2c_master_send(c,buf,2);
lock=mt2032_check_lo_lock(c);
return lock;
}
static void mt2032_set_if_freq(struct i2c_client *c, 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 tuner *t = i2c_get_clientdata(c);
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=i2c_master_send(c,buf,1);
i2c_master_recv(c,buf,21);
buf[0]=0;
ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,t->xogc);
if (ret<0)
return;
// send only the relevant registers per Rev. 1.2
buf[0]=0;
ret=i2c_master_send(c,buf,4);
buf[5]=5;
ret=i2c_master_send(c,buf+5,4);
buf[11]=11;
ret=i2c_master_send(c,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(c);
if(optimize_vco)
lock=mt2032_optimize_vco(c,sel,lock);
if(lock==6) break;
tuner_dbg("mt2032: re-init PLLs by LINT\n");
buf[0]=7;
buf[1]=0x80 +8+t->xogc; // set LINT to re-init PLLs
i2c_master_send(c,buf,2);
mdelay(10);
buf[1]=8+t->xogc;
i2c_master_send(c,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=i2c_master_send(c,buf,2);
if (ret!=2)
tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
}
static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
int if2,from,to;
// signal bandwidth and picture carrier
if (t->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(c, freq*62500 /* freq*1000*1000/16 */,
1090*1000*1000, if2, from, to);
}
static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
int if2 = t->radio_if2;
// per Manual for FM tuning: first if center freq. 1085 MHz
mt2032_set_if_freq(c, freq * 1000 / 16,
1085*1000*1000,if2,if2,if2);
}
// Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
static int mt2032_init(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
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=i2c_master_send(c,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=i2c_master_send(c,buf+5,6);
buf[12]=13; // Index register 13
buf[13]=0x32;
ret=i2c_master_send(c,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;
i2c_master_send(c,buf,1);
i2c_master_recv(c,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=i2c_master_send(c,buf,2);
if (ret!=2)
tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
} while (xok != 1 );
t->xogc=xogc;
t->set_tv_freq = mt2032_set_tv_freq;
t->set_radio_freq = mt2032_set_radio_freq;
return(1);
}
static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
{
struct tuner *t = i2c_get_clientdata(c);
unsigned char buf[2];
int ret;
buf[0] = 6;
buf[1] = antenna ? 0x11 : 0x10;
ret=i2c_master_send(c,buf,2);
tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
}
static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
{
struct tuner *t = i2c_get_clientdata(c);
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 (tuner_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 (tuner_debug > 1) {
int i;
tuner_dbg("bufs is: ");
for(i=0;i<6;i++)
printk("%x ",buf[i]);
printk("\n");
}
ret=i2c_master_send(c,buf,6);
if (ret!=6)
tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
}
static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
unsigned int if2;
if (t->std & V4L2_STD_525_60) {
// NTSC
if2 = 45750*1000;
} else {
// PAL
if2 = 38900*1000;
}
if (V4L2_TUNER_DIGITAL_TV == t->mode) {
// DVB (pinnacle 300i)
if2 = 36150*1000;
}
mt2050_set_if_freq(c, freq*62500, if2);
mt2050_set_antenna(c, tv_antenna);
}
static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
struct tuner *t = i2c_get_clientdata(c);
int if2 = t->radio_if2;
mt2050_set_if_freq(c, freq * 1000 / 16, if2);
mt2050_set_antenna(c, radio_antenna);
}
static int mt2050_init(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
unsigned char buf[2];
int ret;
buf[0]=6;
buf[1]=0x10;
ret=i2c_master_send(c,buf,2); // power
buf[0]=0x0f;
buf[1]=0x0f;
ret=i2c_master_send(c,buf,2); // m1lo
buf[0]=0x0d;
ret=i2c_master_send(c,buf,1);
i2c_master_recv(c,buf,1);
tuner_dbg("mt2050: sro is %x\n",buf[0]);
t->set_tv_freq = mt2050_set_tv_freq;
t->set_radio_freq = mt2050_set_radio_freq;
return 0;
}
int microtune_init(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
char *name;
unsigned char buf[21];
int company_code;
memset(buf,0,sizeof(buf));
t->set_tv_freq = NULL;
t->set_radio_freq = NULL;
t->standby = NULL;
if (t->std & V4L2_STD_525_60) {
tuner_dbg("pinnacle ntsc\n");
t->radio_if2 = 41300 * 1000;
} else {
tuner_dbg("pinnacle pal\n");
t->radio_if2 = 33300 * 1000;
}
name = "unknown";
i2c_master_send(c,buf,1);
i2c_master_recv(c,buf,21);
if (tuner_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(c);
break;
case MT2050:
mt2050_init(c);
break;
default:
tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
name);
return 0;
}
strlcpy(c->name, name, sizeof(c->name));
tuner_info("microtune %s found, OK\n",name);
return 0;
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
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