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| author | Manu Abraham <manu@linuxtv.org> | 2008-02-04 02:37:02 +0400 |
|---|---|---|
| committer | Manu Abraham <manu@linuxtv.org> | 2008-02-04 02:37:02 +0400 |
| commit | a52af51ed4b377cab3886bb48864a036a2b0081c (patch) | |
| tree | 3d7694278c9d702253f0018beced2fa614251764 /linux/drivers/media/dvb/frontends/stb0899_drv.c | |
| parent | aff258c53f552369f3eed1508f809a808e368f1e (diff) | |
| download | mediapointer-dvb-s2-a52af51ed4b377cab3886bb48864a036a2b0081c.tar.gz mediapointer-dvb-s2-a52af51ed4b377cab3886bb48864a036a2b0081c.tar.bz2 | |
Optimization, Fix a Bug
* cut down some I/O operations by disabling "disable gate"
* budget_av was left with the gate open, thereby more susceptible
to RF interference due to I/O operations
From: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Diffstat (limited to 'linux/drivers/media/dvb/frontends/stb0899_drv.c')
| -rw-r--r-- | linux/drivers/media/dvb/frontends/stb0899_drv.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/linux/drivers/media/dvb/frontends/stb0899_drv.c b/linux/drivers/media/dvb/frontends/stb0899_drv.c index 4beda52fb..a3f019b3c 100644 --- a/linux/drivers/media/dvb/frontends/stb0899_drv.c +++ b/linux/drivers/media/dvb/frontends/stb0899_drv.c @@ -1282,7 +1282,7 @@ static int stb0899_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone) return 0; } -static int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) { int i2c_stat; struct stb0899_state *state = fe->demodulator_priv; @@ -1296,10 +1296,15 @@ static int stb0899_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) i2c_stat |= STB0899_I2CTON; if (stb0899_write_reg(state, STB0899_I2CRPT, i2c_stat) < 0) goto err; + } else { + dprintk(state->verbose, FE_DEBUG, 1, "Disabling I2C Repeater ..."); + i2c_stat &= ~STB0899_I2CTON; + if (stb0899_write_reg(state, STB0899_I2CRPT, i2c_stat) < 0) + goto err; } return 0; err: - dprintk(state->verbose, FE_ERROR, 1, "I2C Repeater enable failed"); + dprintk(state->verbose, FE_ERROR, 1, "I2C Repeater control failed"); return -EREMOTEIO; } @@ -1633,10 +1638,17 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa internal->derot_percent = 30; /* What to do for tuners having no bandwidth setup ? */ + /* enable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 1); + if (state->config->tuner_set_bandwidth) state->config->tuner_set_bandwidth(fe, (13 * (stb0899_carr_width(state) + SearchRange)) / 10); if (state->config->tuner_get_bandwidth) state->config->tuner_get_bandwidth(fe, &internal->tuner_bw); + + /* disable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 0); + /* Set DVB-S1 AGC */ stb0899_write_reg(state, STB0899_AGCRFCFG, 0x11); @@ -1665,11 +1677,17 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa internal->srate = i_params->srate; internal->srch_range = SearchRange; + /* enable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 1); + if (state->config->tuner_set_bandwidth) state->config->tuner_set_bandwidth(fe, (stb0899_carr_width(state) + SearchRange)); if (state->config->tuner_get_bandwidth) state->config->tuner_get_bandwidth(fe, &internal->tuner_bw); + /* disable tuner I/O */ + stb0899_i2c_gate_ctrl(&state->frontend, 0); + // pParams->SpectralInv = pSearch->IQ_Inversion; /* Set DVB-S2 AGC */ |