diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/dvb/frontends/stb0899_algo.c | 36 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/stb0899_priv.h | 1 |
2 files changed, 5 insertions, 32 deletions
diff --git a/drivers/media/dvb/frontends/stb0899_algo.c b/drivers/media/dvb/frontends/stb0899_algo.c index 65bc032964b..b7752473f7a 100644 --- a/drivers/media/dvb/frontends/stb0899_algo.c +++ b/drivers/media/dvb/frontends/stb0899_algo.c @@ -73,20 +73,16 @@ u32 stb0899_get_srate(struct stb0899_state *state) */ static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate) { - u32 tmp, tmp_up, srate_up; - u8 sfr_up[3], sfr[3]; + u32 tmp; + u8 sfr[3]; -// srate_up = srate; dprintk(state->verbose, FE_DEBUG, 1, "-->"); /* * in order to have the maximum precision, the symbol rate entered into * the chip is computed as the closest value of the "true value". * In this purpose, the symbol rate value is rounded (1 is added on the bit * below the LSB ) - */ -// srate_up += (srate_up * 3) / 100; - - /* + * * srate = (SFR * master_clk) >> 20 * <=> * SFR = srate << 20 / master_clk @@ -97,41 +93,20 @@ static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 sr * stored as 20 bit number with an offset of 4 bit: * sfr = SFR << 4; */ -// tmp_up = stb0899_do_div((((u64)srate_up) << 21) + master_clk, 2 * master_clk); -// tmp_up <<= 4; tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk); tmp <<= 4; -// sfr_up[0] = tmp_up >> 16; -// sfr_up[1] = tmp_up >> 8; -// sfr_up[2] = tmp_up; - sfr[0] = tmp >> 16; sfr[1] = tmp >> 8; sfr[2] = tmp; -// stb0899_write_regs(state, STB0899_SFRUPH, sfr_up, 3); stb0899_write_regs(state, STB0899_SFRH, sfr, 3); return srate; } /* - * stb0899_calc_loop_time - * Compute the amount of time needed by the timing loop to lock - * SymbolRate: Symbol rate - * return: timing loop time constant (ms) - */ -static long stb0899_calc_loop_time(long srate) -{ - if (srate > 0) - return (100000 / (srate / 1000)); - else - return 0; -} - -/* * stb0899_calc_derot_time * Compute the amount of time needed by the derotator to lock * SymbolRate: Symbol rate @@ -197,7 +172,7 @@ static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state) u8 reg; s8 timing; - msleep(internal->t_timing); + msleep(internal->t_derot); stb0899_write_reg(state, STB0899_RTF, 0xf2); reg = stb0899_read_reg(state, STB0899_TLIR); @@ -574,7 +549,6 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) /* Initial calculations */ internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol */ - internal->t_timing = stb0899_calc_loop_time(params->srate); internal->t_derot = stb0899_calc_derot_time(params->srate); internal->t_data = 500; @@ -617,7 +591,7 @@ enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state) if (state->config->tuner_get_frequency) state->config->tuner_get_frequency(&state->frontend, &internal->freq); - msleep(internal->t_agc1 + internal->t_agc2 + internal->t_timing); /* AGC1, AGC2 and timing loop */ + msleep(internal->t_agc1 + internal->t_agc2 + internal->t_derot); /* AGC1, AGC2 and timing loop */ dprintk(state->verbose, FE_DEBUG, 1, "current derot freq=%d", internal->derot_freq); internal->status = AGC1OK; diff --git a/drivers/media/dvb/frontends/stb0899_priv.h b/drivers/media/dvb/frontends/stb0899_priv.h index f9b8f51446a..8a7c4ee087d 100644 --- a/drivers/media/dvb/frontends/stb0899_priv.h +++ b/drivers/media/dvb/frontends/stb0899_priv.h @@ -182,7 +182,6 @@ struct stb0899_internal { s16 direction; /* Current derotator search direction */ s16 derot_step; /* Derotator step (binary value) */ - s16 t_timing; /* Timing loop time constant (ms) */ s16 t_derot; /* Derotator time constant (ms) */ s16 t_data; /* Data recovery time constant (ms) */ s16 sub_dir; /* Direction of the next sub range */ |