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V4L/DVB (13355): stv090x: fixes calculation of AGC2 and uses a different AGC2 threshold for cut 3 chips 

Signed-off-by: Andreas Regel <andreas.regel@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andreas Regel 2009-11-13 18:16:44 -03:00 коммит произвёл Mauro Carvalho Chehab
Родитель b671a8d4b6
Коммит b4a4248d56
2 изменённых файлов: 23 добавлений и 12 удалений
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33
drivers/media/dvb/frontends/stv090x.c
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@ -1485,7 +1485,7 @@ err:
static int stv090x_get_agc2_min_level(struct stv090x_state *state)
{
u32 agc2_min = 0, agc2 = 0, freq_init, freq_step, reg;
u32 agc2_min = 0xffff, agc2 = 0, freq_init, freq_step, reg;
s32 i, j, steps, dir;
if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
@ -1536,13 +1536,14 @@ static int stv090x_get_agc2_min_level(struct stv090x_state *state)
if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x58) < 0) /* Demod RESET */
goto err;
msleep(10);
agc2 = 0;
for (j = 0; j < 10; j++) {
agc2 += STV090x_READ_DEMOD(state, AGC2I1) << 8;
agc2 |= STV090x_READ_DEMOD(state, AGC2I0);
agc2 += (STV090x_READ_DEMOD(state, AGC2I1) << 8) |
STV090x_READ_DEMOD(state, AGC2I0);
}
agc2 /= 10;
agc2_min = 0xffff;
if (agc2 < 0xffff)
if (agc2 < agc2_min)
agc2_min = agc2;
}
@ -1584,6 +1585,12 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
int tmg_lock = 0, i;
s32 tmg_cpt = 0, dir = 1, steps, cur_step = 0, freq;
u32 srate_coarse = 0, agc2 = 0, car_step = 1200, reg;
u32 agc2th;
if (state->dev_ver >= 0x30)
agc2th = 0x2e00;
else
agc2th = 0x1f00;
reg = STV090x_READ_DEMOD(state, DMDISTATE);
STV090x_SETFIELD_Px(reg, I2C_DEMOD_MODE_FIELD, 0x1f); /* Demod RESET */
@ -1611,7 +1618,7 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
goto err;
if (STV090x_WRITE_DEMOD(state, DMDTOM, 0x00) < 0)
goto err;
if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x60) < 0)
if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x50) < 0)
goto err;
if (state->dev_ver >= 0x30) {
@ -1661,14 +1668,15 @@ static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
reg = STV090x_READ_DEMOD(state, DSTATUS);
if (STV090x_GETFIELD_Px(reg, TMGLOCK_QUALITY_FIELD) >= 2)
tmg_cpt++;
agc2 += STV090x_READ_DEMOD(state, AGC2I1) << 8;
agc2 |= STV090x_READ_DEMOD(state, AGC2I0);
agc2 += (STV090x_READ_DEMOD(state, AGC2I1) << 8) |
STV090x_READ_DEMOD(state, AGC2I0);
}
agc2 /= 10;
srate_coarse = stv090x_get_srate(state, state->mclk);
cur_step++;
dir *= -1;
if ((tmg_cpt >= 5) && (agc2 < 0x1f00) && (srate_coarse < 55000000) && (srate_coarse > 850000))
if ((tmg_cpt >= 5) && (agc2 < agc2th) &&
(srate_coarse < 50000000) && (srate_coarse > 850000))
tmg_lock = 1;
else if (cur_step < steps) {
if (dir > 0)
@ -1751,6 +1759,9 @@ static u32 stv090x_srate_srch_fine(struct stv090x_state *state)
if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
goto err;
if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
goto err;
if (state->dev_ver >= 0x30) {
if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x79) < 0)
goto err;
@ -1908,8 +1919,8 @@ static int stv090x_blind_search(struct stv090x_state *state)
cpt_fail = 0;
agc2_ovflw = 0;
for (i = 0; i < 10; i++) {
agc2 = STV090x_READ_DEMOD(state, AGC2I1) << 8;
agc2 |= STV090x_READ_DEMOD(state, AGC2I0);
agc2 += (STV090x_READ_DEMOD(state, AGC2I1) << 8) |
STV090x_READ_DEMOD(state, AGC2I0);
if (agc2 >= 0xff00)
agc2_ovflw++;
reg = STV090x_READ_DEMOD(state, DSTATUS2);

2
drivers/media/dvb/frontends/stv090x_priv.h
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@ -83,7 +83,7 @@
#define STV090x_IQPOWER_THRESHOLD 30
#define STV090x_SEARCH_AGC2_TH_CUT20 700
#define STV090x_SEARCH_AGC2_TH_CUT30 1200
#define STV090x_SEARCH_AGC2_TH_CUT30 1400
#define STV090x_SEARCH_AGC2_TH(__ver) \
((__ver <= 0x20) ? \