summaryrefslogtreecommitdiff
path: root/linux/drivers/media/dvb/frontends/mt2060.c
diff options
context:
space:
mode:
Diffstat (limited to 'linux/drivers/media/dvb/frontends/mt2060.c')
-rw-r--r--linux/drivers/media/dvb/frontends/mt2060.c153
1 files changed, 93 insertions, 60 deletions
diff --git a/linux/drivers/media/dvb/frontends/mt2060.c b/linux/drivers/media/dvb/frontends/mt2060.c
index 4d8efe1ae..728bc2cd5 100644
--- a/linux/drivers/media/dvb/frontends/mt2060.c
+++ b/linux/drivers/media/dvb/frontends/mt2060.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
+#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include "mt2060.h"
#include "mt2060_priv.h"
@@ -55,7 +56,8 @@ static int mt2060_writereg(struct mt2060_state *state, u8 reg, u8 val)
{
u8 buf[2];
struct i2c_msg msg = {
- .addr = state->config->i2c_address, .flags = 0, .buf = buf, .len = 2 };
+ .addr = state->config->i2c_address, .flags = 0, .buf = buf, .len = 2
+ };
buf[0]=reg;
buf[1]=val;
@@ -70,7 +72,8 @@ static int mt2060_writereg(struct mt2060_state *state, u8 reg, u8 val)
static int mt2060_writeregs(struct mt2060_state *state,u8 *buf, u8 len)
{
struct i2c_msg msg = {
- .addr = state->config->i2c_address, .flags = 0, .buf = buf, .len = len };
+ .addr = state->config->i2c_address, .flags = 0, .buf = buf, .len = len
+ };
if (i2c_transfer(state->i2c, &msg, 1) != 1) {
printk(KERN_WARNING "mt2060 I2C write failed (len=%i)\n",(int)len);
return -EREMOTEIO;
@@ -117,13 +120,13 @@ static int mt2060_spurcalc(u32 lo1,u32 lo2,u32 if2)
int I,J;
int dia,diamin,diff;
diamin=1000000;
- for (I=1;I<10;I++) {
- J=((2*I*lo1)/lo2+1)/2;
- diff=I*(int)lo1-J*(int)lo2;
- if (diff<0) diff=-diff;
- dia=(diff-(int)if2);
- if (dia<0) dia=-dia;
- if (diamin>dia) diamin=dia;
+ for (I = 1; I < 10; I++) {
+ J = ((2*I*lo1)/lo2+1)/2;
+ diff = I*(int)lo1-J*(int)lo2;
+ if (diff < 0) diff=-diff;
+ dia = (diff-(int)if2);
+ if (dia < 0) dia=-dia;
+ if (diamin > dia) diamin=dia;
}
return diamin;
}
@@ -139,20 +142,22 @@ static int mt2060_spurcheck(u32 lo1,u32 lo2,u32 if2)
J=1000;
Spur=mt2060_spurcalc(lo1,lo2,if2);
- if (Spur<BANDWIDTH) {
+ if (Spur < BANDWIDTH) {
/* Potential spurs detected */
dprintk("Spurs before : f_lo1: %d f_lo2: %d (kHz)",
(int)lo1,(int)lo2);
I=1000;
- Sp1=mt2060_spurcalc(lo1+I,lo2+I,if2);
- Sp2=mt2060_spurcalc(lo1-I,lo2-I,if2);
+ Sp1 = mt2060_spurcalc(lo1+I,lo2+I,if2);
+ Sp2 = mt2060_spurcalc(lo1-I,lo2-I,if2);
- if (Sp1<Sp2) { J=-J; I=-I; Spur=Sp2; }
- else Spur=Sp1;
+ if (Sp1 < Sp2) {
+ J=-J; I=-I; Spur=Sp2;
+ } else
+ Spur=Sp1;
- while (Spur<BANDWIDTH) {
- I+=J;
- Spur=mt2060_spurcalc(lo1+I,lo2+I,if2);
+ while (Spur < BANDWIDTH) {
+ I += J;
+ Spur = mt2060_spurcalc(lo1+I,lo2+I,if2);
}
dprintk("Spurs after : f_lo1: %d f_lo2: %d (kHz)",
(int)(lo1+I),(int)(lo2+I));
@@ -167,52 +172,51 @@ static int mt2060_spurcheck(u32 lo1,u32 lo2,u32 if2)
int mt2060_set(struct mt2060_state *state, struct dvb_frontend_parameters *fep)
{
+ int ret=0;
u32 freq;
- int lnaband;
+ u8 lnaband;
u32 f_lo1,f_lo2;
u32 div1,num1,div2,num2;
u8 b[8];
- int ret=0;
- freq=fep->frequency / 1000; // Hz -> kHz
+ freq = fep->frequency / 1000; // Hz -> kHz
- f_lo1=freq + IF1;
- f_lo1=(f_lo1/250)*250;
- f_lo2=f_lo1 - freq - IF2;
- f_lo2=(f_lo2/50)*50;
+ f_lo1 = freq + IF1;
+ f_lo1 = (f_lo1/250)*250;
+ f_lo2 = f_lo1 - freq - IF2;
+ f_lo2 = (f_lo2/50)*50;
#ifdef MT2060_SPURCHECK
// LO-related spurs detection and correction
- num1=mt2060_spurcheck(f_lo1,f_lo2,IF2);
- f_lo1+=num1;
- f_lo2+=num1;
+ num1 = mt2060_spurcheck(f_lo1,f_lo2,IF2);
+ f_lo1 += num1;
+ f_lo2 += num1;
#endif
//Frequency LO1 = 16MHz * (DIV1 + NUM1/64 )
- div1=f_lo1 / FREF;
- num1=(64 * (f_lo1 % FREF) )/FREF;
+ div1 = f_lo1 / FREF;
+ num1 = (64 * (f_lo1 % FREF) )/FREF;
// Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 )
- div2=f_lo2 / FREF;
- num2=(16384 * (f_lo2 % FREF) /FREF +1)/2;
-
- if (freq<=95 *1000) lnaband=0xB0; else
- if (freq<=180*1000) lnaband=0xA0; else
- if (freq<=260*1000) lnaband=0x90; else
- if (freq<=335*1000) lnaband=0x80; else
- if (freq<=425*1000) lnaband=0x70; else
- if (freq<=480*1000) lnaband=0x60; else
- if (freq<=570*1000) lnaband=0x50; else
- if (freq<=645*1000) lnaband=0x40; else
- if (freq<=730*1000) lnaband=0x30; else
- if (freq<=810*1000) lnaband=0x20; else
- lnaband=0x10;
-
- b[0]=REG_LO1C1;
- b[1]=lnaband | ((num1 >>2) & 0x0F);
- b[2]=div1;
- b[3]=(num2 & 0x0F) | ((num1 & 3) << 4);
- b[4]=num2 >> 4;
- b[5]=((num2 >>12) & 1) | (div2 << 1);
+ div2 = f_lo2 / FREF;
+ num2 = (16384 * (f_lo2 % FREF) /FREF +1)/2;
+
+ if (freq <= 95000) lnaband = 0xB0; else
+ if (freq <= 180000) lnaband = 0xA0; else
+ if (freq <= 260000) lnaband = 0x90; else
+ if (freq <= 335000) lnaband = 0x80; else
+ if (freq <= 425000) lnaband = 0x70; else
+ if (freq <= 480000) lnaband = 0x60; else
+ if (freq <= 570000) lnaband = 0x50; else
+ if (freq <= 645000) lnaband = 0x40; else
+ if (freq <= 730000) lnaband = 0x30; else
+ if (freq <= 810000) lnaband = 0x20; else lnaband = 0x10;
+
+ b[0] = REG_LO1C1;
+ b[1] = lnaband | ((num1 >>2) & 0x0F);
+ b[2] = div1;
+ b[3] = (num2 & 0x0F) | ((num1 & 3) << 4);
+ b[4] = num2 >> 4;
+ b[5] = ((num2 >>12) & 1) | (div2 << 1);
dprintk("PLL freq: %d f_lo1: %d f_lo2: %d (kHz)",(int)freq,(int)f_lo1,(int)f_lo2);
dprintk("PLL div1: %d num1: %d div2: %d num2: %d",(int)div1,(int)num1,(int)div2,(int)num2);
@@ -223,10 +227,45 @@ int mt2060_set(struct mt2060_state *state, struct dvb_frontend_parameters *fep)
}
EXPORT_SYMBOL(mt2060_set);
+/* from usbsnoop.log */
+static void mt2060_calibrate(struct mt2060_state *state)
+{
+ u8 b = 0;
+ int i = 0;
+ do {
+ b |= (1 << 6); // FM1SS;
+ mt2060_writereg(state, REG_LO2C1,b);
+ msleep(25);
+
+ if (i == 0) {
+ b |= (1 << 7); // FM1CA;
+ mt2060_writereg(state, REG_LO2C1,b);
+ b &= ~(1 << 7); // FM1CA;
+ msleep(25);
+ }
+
+ b &= ~(1 << 6); // FM1SS
+ mt2060_writereg(state, REG_LO2C1,b);
+
+ msleep(25);
+ i++;
+ } while (i < 9);
+
+ i = 0;
+ while (i++ < 10 && mt2060_readreg(state, REG_MISC_STAT, &b) == 0 && (b & (1 << 6)) == 0)
+ msleep(25);
+
+ if (i < 10) {
+ mt2060_readreg(state, REG_FM_FREQ, &state->fmfreq); // now find out, what is fmreq used for :)
+ dprintk("calibration was successful: %d",state->fmfreq);
+ } else
+ dprintk("FMCAL timed out");
+}
+
/* This functions tries to identify a MT2060 tuner by reading the PART/REV register. This is hasty. */
int mt2060_attach(struct mt2060_state *state, struct mt2060_config *config, struct i2c_adapter *i2c)
{
- u8 id;
+ u8 id = 0;
memset(state,0,sizeof(struct mt2060_state));
state->config = config;
@@ -235,19 +274,13 @@ int mt2060_attach(struct mt2060_state *state, struct mt2060_config *config, stru
if (mt2060_readreg(state,REG_PART_REV,&id) != 0)
return -ENODEV;
- if (id!=PART_REV)
- return -ENODEV;
-
- if (mt2060_writereg(state,REG_PART_REV,0) != 0)
+ if (id != PART_REV)
return -ENODEV;
- if (mt2060_readreg(state,REG_PART_REV,&id) != 0)
- return -ENODEV;
+ printk(KERN_INFO "MT2060: successfully identified\n");
- if (id!=PART_REV)
- return -ENODEV;
+ mt2060_calibrate(state);
- printk(KERN_INFO "MT2060: Identified Microtune MT2060 chip\n");
return 0;
}
EXPORT_SYMBOL(mt2060_attach);
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-16 06:56:02 +0000