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linux/drivers/media/dvb-frontends/stb0899_algo.c
Thomas Gleixner 74ba9207e1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  675 mass ave cambridge ma 02139 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:36:45 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
STB0899 Multistandard Frontend driver
Copyright (C) Manu Abraham (abraham.manu@gmail.com)
Copyright (C) ST Microelectronics
*/
#include <linux/bitops.h>
#include "stb0899_drv.h"
#include "stb0899_priv.h"
#include "stb0899_reg.h"
static inline u32 stb0899_do_div(u64 n, u32 d)
{
/* wrap do_div() for ease of use */
do_div(n, d);
return n;
}
#if 0
/* These functions are currently unused */
/*
* stb0899_calc_srate
* Compute symbol rate
*/
static u32 stb0899_calc_srate(u32 master_clk, u8 *sfr)
{
u64 tmp;
/* srate = (SFR * master_clk) >> 20 */
/* sfr is of size 20 bit, stored with an offset of 4 bit */
tmp = (((u32)sfr[0]) << 16) | (((u32)sfr[1]) << 8) | sfr[2];
tmp &= ~0xf;
tmp *= master_clk;
tmp >>= 24;
return tmp;
}
/*
* stb0899_get_srate
* Get the current symbol rate
*/
static u32 stb0899_get_srate(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
u8 sfr[3];
stb0899_read_regs(state, STB0899_SFRH, sfr, 3);
return stb0899_calc_srate(internal->master_clk, sfr);
}
#endif
/*
* stb0899_set_srate
* Set symbol frequency
* MasterClock: master clock frequency (hz)
* SymbolRate: symbol rate (bauds)
* return symbol frequency
*/
static u32 stb0899_set_srate(struct stb0899_state *state, u32 master_clk, u32 srate)
{
u32 tmp;
u8 sfr[3];
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 = (SFR * master_clk) >> 20
* <=>
* SFR = srate << 20 / master_clk
*
* rounded:
* SFR = (srate << 21 + master_clk) / (2 * master_clk)
*
* stored as 20 bit number with an offset of 4 bit:
* sfr = SFR << 4;
*/
tmp = stb0899_do_div((((u64)srate) << 21) + master_clk, 2 * master_clk);
tmp <<= 4;
sfr[0] = tmp >> 16;
sfr[1] = tmp >> 8;
sfr[2] = tmp;
stb0899_write_regs(state, STB0899_SFRH, sfr, 3);
return srate;
}
/*
* stb0899_calc_derot_time
* Compute the amount of time needed by the derotator to lock
* SymbolRate: Symbol rate
* return: derotator time constant (ms)
*/
static long stb0899_calc_derot_time(long srate)
{
if (srate > 0)
return (100000 / (srate / 1000));
else
return 0;
}
/*
* stb0899_carr_width
* Compute the width of the carrier
* return: width of carrier (kHz or Mhz)
*/
long stb0899_carr_width(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
return (internal->srate + (internal->srate * internal->rolloff) / 100);
}
/*
* stb0899_first_subrange
* Compute the first subrange of the search
*/
static void stb0899_first_subrange(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
struct stb0899_config *config = state->config;
int range = 0;
u32 bandwidth = 0;
if (config->tuner_get_bandwidth) {
stb0899_i2c_gate_ctrl(&state->frontend, 1);
config->tuner_get_bandwidth(&state->frontend, &bandwidth);
stb0899_i2c_gate_ctrl(&state->frontend, 0);
range = bandwidth - stb0899_carr_width(state) / 2;
}
if (range > 0)
internal->sub_range = min(internal->srch_range, range);
else
internal->sub_range = 0;
internal->freq = params->freq;
internal->tuner_offst = 0L;
internal->sub_dir = 1;
}
/*
* stb0899_check_tmg
* check for timing lock
* internal.Ttiming: time to wait for loop lock
*/
static enum stb0899_status stb0899_check_tmg(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
int lock;
u8 reg;
s8 timing;
msleep(internal->t_derot);
stb0899_write_reg(state, STB0899_RTF, 0xf2);
reg = stb0899_read_reg(state, STB0899_TLIR);
lock = STB0899_GETFIELD(TLIR_TMG_LOCK_IND, reg);
timing = stb0899_read_reg(state, STB0899_RTF);
if (lock >= 42) {
if ((lock > 48) && (abs(timing) >= 110)) {
internal->status = ANALOGCARRIER;
dprintk(state->verbose, FE_DEBUG, 1, "-->ANALOG Carrier !");
} else {
internal->status = TIMINGOK;
dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK !");
}
} else {
internal->status = NOTIMING;
dprintk(state->verbose, FE_DEBUG, 1, "-->NO TIMING !");
}
return internal->status;
}
/*
* stb0899_search_tmg
* perform a fs/2 zig-zag to find timing
*/
static enum stb0899_status stb0899_search_tmg(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
short int derot_step, derot_freq = 0, derot_limit, next_loop = 3;
int index = 0;
u8 cfr[2];
internal->status = NOTIMING;
/* timing loop computation & symbol rate optimisation */
derot_limit = (internal->sub_range / 2L) / internal->mclk;
derot_step = (params->srate / 2L) / internal->mclk;
while ((stb0899_check_tmg(state) != TIMINGOK) && next_loop) {
index++;
derot_freq += index * internal->direction * derot_step; /* next derot zig zag position */
if (abs(derot_freq) > derot_limit)
next_loop--;
if (next_loop) {
STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
}
internal->direction = -internal->direction; /* Change zigzag direction */
}
if (internal->status == TIMINGOK) {
stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
dprintk(state->verbose, FE_DEBUG, 1, "------->TIMING OK ! Derot Freq = %d", internal->derot_freq);
}
return internal->status;
}
/*
* stb0899_check_carrier
* Check for carrier found
*/
static enum stb0899_status stb0899_check_carrier(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
u8 reg;
msleep(internal->t_derot); /* wait for derotator ok */
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
stb0899_write_reg(state, STB0899_CFD, reg);
reg = stb0899_read_reg(state, STB0899_DSTATUS);
dprintk(state->verbose, FE_DEBUG, 1, "--------------------> STB0899_DSTATUS=[0x%02x]", reg);
if (STB0899_GETFIELD(CARRIER_FOUND, reg)) {
internal->status = CARRIEROK;
dprintk(state->verbose, FE_DEBUG, 1, "-------------> CARRIEROK !");
} else {
internal->status = NOCARRIER;
dprintk(state->verbose, FE_DEBUG, 1, "-------------> NOCARRIER !");
}
return internal->status;
}
/*
* stb0899_search_carrier
* Search for a QPSK carrier with the derotator
*/
static enum stb0899_status stb0899_search_carrier(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
short int derot_freq = 0, last_derot_freq = 0, derot_limit, next_loop = 3;
int index = 0;
u8 cfr[2];
u8 reg;
internal->status = NOCARRIER;
derot_limit = (internal->sub_range / 2L) / internal->mclk;
derot_freq = internal->derot_freq;
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
stb0899_write_reg(state, STB0899_CFD, reg);
do {
dprintk(state->verbose, FE_DEBUG, 1, "Derot Freq=%d, mclk=%d", derot_freq, internal->mclk);
if (stb0899_check_carrier(state) == NOCARRIER) {
index++;
last_derot_freq = derot_freq;
derot_freq += index * internal->direction * internal->derot_step; /* next zig zag derotator position */
if(abs(derot_freq) > derot_limit)
next_loop--;
if (next_loop) {
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
stb0899_write_reg(state, STB0899_CFD, reg);
STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
}
}
internal->direction = -internal->direction; /* Change zigzag direction */
} while ((internal->status != CARRIEROK) && next_loop);
if (internal->status == CARRIEROK) {
stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
dprintk(state->verbose, FE_DEBUG, 1, "----> CARRIER OK !, Derot Freq=%d", internal->derot_freq);
} else {
internal->derot_freq = last_derot_freq;
}
return internal->status;
}
/*
* stb0899_check_data
* Check for data found
*/
static enum stb0899_status stb0899_check_data(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
int lock = 0, index = 0, dataTime = 500, loop;
u8 reg;
internal->status = NODATA;
/* RESET FEC */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESACS, reg, 1);
stb0899_write_reg(state, STB0899_TSTRES, reg);
msleep(1);
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESACS, reg, 0);
stb0899_write_reg(state, STB0899_TSTRES, reg);
if (params->srate <= 2000000)
dataTime = 2000;
else if (params->srate <= 5000000)
dataTime = 1500;
else if (params->srate <= 15000000)
dataTime = 1000;
else
dataTime = 500;
/* clear previous failed END_LOOPVIT */
stb0899_read_reg(state, STB0899_VSTATUS);
stb0899_write_reg(state, STB0899_DSTATUS2, 0x00); /* force search loop */
while (1) {
/* WARNING! VIT LOCKED has to be tested before VIT_END_LOOOP */
reg = stb0899_read_reg(state, STB0899_VSTATUS);
lock = STB0899_GETFIELD(VSTATUS_LOCKEDVIT, reg);
loop = STB0899_GETFIELD(VSTATUS_END_LOOPVIT, reg);
if (lock || loop || (index > dataTime))
break;
index++;
}
if (lock) { /* DATA LOCK indicator */
internal->status = DATAOK;
dprintk(state->verbose, FE_DEBUG, 1, "-----------------> DATA OK !");
}
return internal->status;
}
/*
* stb0899_search_data
* Search for a QPSK carrier with the derotator
*/
static enum stb0899_status stb0899_search_data(struct stb0899_state *state)
{
short int derot_freq, derot_step, derot_limit, next_loop = 3;
u8 cfr[2];
u8 reg;
int index = 1;
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
derot_step = (params->srate / 4L) / internal->mclk;
derot_limit = (internal->sub_range / 2L) / internal->mclk;
derot_freq = internal->derot_freq;
do {
if ((internal->status != CARRIEROK) || (stb0899_check_data(state) != DATAOK)) {
derot_freq += index * internal->direction * derot_step; /* next zig zag derotator position */
if (abs(derot_freq) > derot_limit)
next_loop--;
if (next_loop) {
dprintk(state->verbose, FE_DEBUG, 1, "Derot freq=%d, mclk=%d", derot_freq, internal->mclk);
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
stb0899_write_reg(state, STB0899_CFD, reg);
STB0899_SETFIELD_VAL(CFRM, cfr[0], MSB(internal->inversion * derot_freq));
STB0899_SETFIELD_VAL(CFRL, cfr[1], LSB(internal->inversion * derot_freq));
stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* derotator frequency */
stb0899_check_carrier(state);
index++;
}
}
internal->direction = -internal->direction; /* change zig zag direction */
} while ((internal->status != DATAOK) && next_loop);
if (internal->status == DATAOK) {
stb0899_read_regs(state, STB0899_CFRM, cfr, 2); /* get derotator frequency */
/* store autodetected IQ swapping as default for DVB-S2 tuning */
reg = stb0899_read_reg(state, STB0899_IQSWAP);
if (STB0899_GETFIELD(SYM, reg))
internal->inversion = IQ_SWAP_ON;
else
internal->inversion = IQ_SWAP_OFF;
internal->derot_freq = internal->inversion * MAKEWORD16(cfr[0], cfr[1]);
dprintk(state->verbose, FE_DEBUG, 1, "------> DATAOK ! Derot Freq=%d", internal->derot_freq);
}
return internal->status;
}
/*
* stb0899_check_range
* check if the found frequency is in the correct range
*/
static enum stb0899_status stb0899_check_range(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
int range_offst, tp_freq;
range_offst = internal->srch_range / 2000;
tp_freq = internal->freq - (internal->derot_freq * internal->mclk) / 1000;
if ((tp_freq >= params->freq - range_offst) && (tp_freq <= params->freq + range_offst)) {
internal->status = RANGEOK;
dprintk(state->verbose, FE_DEBUG, 1, "----> RANGEOK !");
} else {
internal->status = OUTOFRANGE;
dprintk(state->verbose, FE_DEBUG, 1, "----> OUT OF RANGE !");
}
return internal->status;
}
/*
* NextSubRange
* Compute the next subrange of the search
*/
static void next_sub_range(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_params *params = &state->params;
long old_sub_range;
if (internal->sub_dir > 0) {
old_sub_range = internal->sub_range;
internal->sub_range = min((internal->srch_range / 2) -
(internal->tuner_offst + internal->sub_range / 2),
internal->sub_range);
if (internal->sub_range < 0)
internal->sub_range = 0;
internal->tuner_offst += (old_sub_range + internal->sub_range) / 2;
}
internal->freq = params->freq + (internal->sub_dir * internal->tuner_offst) / 1000;
internal->sub_dir = -internal->sub_dir;
}
/*
* stb0899_dvbs_algo
* Search for a signal, timing, carrier and data for a
* given frequency in a given range
*/
enum stb0899_status stb0899_dvbs_algo(struct stb0899_state *state)
{
struct stb0899_params *params = &state->params;
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u8 bclc, reg;
u8 cfr[2];
u8 eq_const[10];
s32 clnI = 3;
u32 bandwidth = 0;
/* BETA values rated @ 99MHz */
s32 betaTab[5][4] = {
/* 5 10 20 30MBps */
{ 37, 34, 32, 31 }, /* QPSK 1/2 */
{ 37, 35, 33, 31 }, /* QPSK 2/3 */
{ 37, 35, 33, 31 }, /* QPSK 3/4 */
{ 37, 36, 33, 32 }, /* QPSK 5/6 */
{ 37, 36, 33, 32 } /* QPSK 7/8 */
};
internal->direction = 1;
stb0899_set_srate(state, internal->master_clk, params->srate);
/* Carrier loop optimization versus symbol rate for acquisition*/
if (params->srate <= 5000000) {
stb0899_write_reg(state, STB0899_ACLC, 0x89);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0x1c);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 0;
} else if (params->srate <= 15000000) {
stb0899_write_reg(state, STB0899_ACLC, 0xc9);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0x22);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 1;
} else if(params->srate <= 25000000) {
stb0899_write_reg(state, STB0899_ACLC, 0x89);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0x27);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 2;
} else {
stb0899_write_reg(state, STB0899_ACLC, 0xc8);
bclc = stb0899_read_reg(state, STB0899_BCLC);
STB0899_SETFIELD_VAL(BETA, bclc, 0x29);
stb0899_write_reg(state, STB0899_BCLC, bclc);
clnI = 3;
}
dprintk(state->verbose, FE_DEBUG, 1, "Set the timing loop to acquisition");
/* Set the timing loop to acquisition */
stb0899_write_reg(state, STB0899_RTC, 0x46);
stb0899_write_reg(state, STB0899_CFD, 0xee);
/* !! WARNING !!
* Do not read any status variables while acquisition,
* If any needed, read before the acquisition starts
* querying status while acquiring causes the
* acquisition to go bad and hence no locks.
*/
dprintk(state->verbose, FE_DEBUG, 1, "Derot Percent=%d Srate=%d mclk=%d",
internal->derot_percent, params->srate, internal->mclk);
/* Initial calculations */
internal->derot_step = internal->derot_percent * (params->srate / 1000L) / internal->mclk; /* DerotStep/1000 * Fsymbol */
internal->t_derot = stb0899_calc_derot_time(params->srate);
internal->t_data = 500;
dprintk(state->verbose, FE_DEBUG, 1, "RESET stream merger");
/* RESET Stream merger */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 1);
stb0899_write_reg(state, STB0899_TSTRES, reg);
/*
* Set KDIVIDER to an intermediate value between
* 1/2 and 7/8 for acquisition
*/
reg = stb0899_read_reg(state, STB0899_DEMAPVIT);
STB0899_SETFIELD_VAL(DEMAPVIT_KDIVIDER, reg, 60);
stb0899_write_reg(state, STB0899_DEMAPVIT, reg);
stb0899_write_reg(state, STB0899_EQON, 0x01); /* Equalizer OFF while acquiring */
stb0899_write_reg(state, STB0899_VITSYNC, 0x19);
stb0899_first_subrange(state);
do {
/* Initialisations */
cfr[0] = cfr[1] = 0;
stb0899_write_regs(state, STB0899_CFRM, cfr, 2); /* RESET derotator frequency */
stb0899_write_reg(state, STB0899_RTF, 0);
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 1);
stb0899_write_reg(state, STB0899_CFD, reg);
internal->derot_freq = 0;
internal->status = NOAGC1;
/* enable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 1);
/* Move tuner to frequency */
dprintk(state->verbose, FE_DEBUG, 1, "Tuner set frequency");
if (state->config->tuner_set_frequency)
state->config->tuner_set_frequency(&state->frontend, internal->freq);
if (state->config->tuner_get_frequency)
state->config->tuner_get_frequency(&state->frontend, &internal->freq);
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;
/* There is signal in the band */
if (config->tuner_get_bandwidth)
config->tuner_get_bandwidth(&state->frontend, &bandwidth);
/* disable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 0);
if (params->srate <= bandwidth / 2)
stb0899_search_tmg(state); /* For low rates (SCPC) */
else
stb0899_check_tmg(state); /* For high rates (MCPC) */
if (internal->status == TIMINGOK) {
dprintk(state->verbose, FE_DEBUG, 1,
"TIMING OK ! Derot freq=%d, mclk=%d",
internal->derot_freq, internal->mclk);
if (stb0899_search_carrier(state) == CARRIEROK) { /* Search for carrier */
dprintk(state->verbose, FE_DEBUG, 1,
"CARRIER OK ! Derot freq=%d, mclk=%d",
internal->derot_freq, internal->mclk);
if (stb0899_search_data(state) == DATAOK) { /* Check for data */
dprintk(state->verbose, FE_DEBUG, 1,
"DATA OK ! Derot freq=%d, mclk=%d",
internal->derot_freq, internal->mclk);
if (stb0899_check_range(state) == RANGEOK) {
dprintk(state->verbose, FE_DEBUG, 1,
"RANGE OK ! derot freq=%d, mclk=%d",
internal->derot_freq, internal->mclk);
internal->freq = params->freq - ((internal->derot_freq * internal->mclk) / 1000);
reg = stb0899_read_reg(state, STB0899_PLPARM);
internal->fecrate = STB0899_GETFIELD(VITCURPUN, reg);
dprintk(state->verbose, FE_DEBUG, 1,
"freq=%d, internal resultant freq=%d",
params->freq, internal->freq);
dprintk(state->verbose, FE_DEBUG, 1,
"internal puncture rate=%d",
internal->fecrate);
}
}
}
}
if (internal->status != RANGEOK)
next_sub_range(state);
} while (internal->sub_range && internal->status != RANGEOK);
/* Set the timing loop to tracking */
stb0899_write_reg(state, STB0899_RTC, 0x33);
stb0899_write_reg(state, STB0899_CFD, 0xf7);
/* if locked and range ok, set Kdiv */
if (internal->status == RANGEOK) {
dprintk(state->verbose, FE_DEBUG, 1, "Locked & Range OK !");
stb0899_write_reg(state, STB0899_EQON, 0x41); /* Equalizer OFF while acquiring */
stb0899_write_reg(state, STB0899_VITSYNC, 0x39); /* SN to b'11 for acquisition */
/*
* Carrier loop optimization versus
* symbol Rate/Puncture Rate for Tracking
*/
reg = stb0899_read_reg(state, STB0899_BCLC);
switch (internal->fecrate) {
case STB0899_FEC_1_2: /* 13 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 0x1a);
STB0899_SETFIELD_VAL(BETA, reg, betaTab[0][clnI]);
stb0899_write_reg(state, STB0899_BCLC, reg);
break;
case STB0899_FEC_2_3: /* 18 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 44);
STB0899_SETFIELD_VAL(BETA, reg, betaTab[1][clnI]);
stb0899_write_reg(state, STB0899_BCLC, reg);
break;
case STB0899_FEC_3_4: /* 21 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 60);
STB0899_SETFIELD_VAL(BETA, reg, betaTab[2][clnI]);
stb0899_write_reg(state, STB0899_BCLC, reg);
break;
case STB0899_FEC_5_6: /* 24 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 75);
STB0899_SETFIELD_VAL(BETA, reg, betaTab[3][clnI]);
stb0899_write_reg(state, STB0899_BCLC, reg);
break;
case STB0899_FEC_6_7: /* 25 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 88);
stb0899_write_reg(state, STB0899_ACLC, 0x88);
stb0899_write_reg(state, STB0899_BCLC, 0x9a);
break;
case STB0899_FEC_7_8: /* 26 */
stb0899_write_reg(state, STB0899_DEMAPVIT, 94);
STB0899_SETFIELD_VAL(BETA, reg, betaTab[4][clnI]);
stb0899_write_reg(state, STB0899_BCLC, reg);
break;
default:
dprintk(state->verbose, FE_DEBUG, 1, "Unsupported Puncture Rate");
break;
}
/* release stream merger RESET */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 0);
stb0899_write_reg(state, STB0899_TSTRES, reg);
/* disable carrier detector */
reg = stb0899_read_reg(state, STB0899_CFD);
STB0899_SETFIELD_VAL(CFD_ON, reg, 0);
stb0899_write_reg(state, STB0899_CFD, reg);
stb0899_read_regs(state, STB0899_EQUAI1, eq_const, 10);
}
return internal->status;
}
/*
* stb0899_dvbs2_config_uwp
* Configure UWP state machine
*/
static void stb0899_dvbs2_config_uwp(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u32 uwp1, uwp2, uwp3, reg;
uwp1 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL1);
uwp2 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL2);
uwp3 = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_CNTRL3);
STB0899_SETFIELD_VAL(UWP_ESN0_AVE, uwp1, config->esno_ave);
STB0899_SETFIELD_VAL(UWP_ESN0_QUANT, uwp1, config->esno_quant);
STB0899_SETFIELD_VAL(UWP_TH_SOF, uwp1, config->uwp_threshold_sof);
STB0899_SETFIELD_VAL(FE_COARSE_TRK, uwp2, internal->av_frame_coarse);
STB0899_SETFIELD_VAL(FE_FINE_TRK, uwp2, internal->av_frame_fine);
STB0899_SETFIELD_VAL(UWP_MISS_TH, uwp2, config->miss_threshold);
STB0899_SETFIELD_VAL(UWP_TH_ACQ, uwp3, config->uwp_threshold_acq);
STB0899_SETFIELD_VAL(UWP_TH_TRACK, uwp3, config->uwp_threshold_track);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL1, STB0899_OFF0_UWP_CNTRL1, uwp1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL2, STB0899_OFF0_UWP_CNTRL2, uwp2);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_UWP_CNTRL3, STB0899_OFF0_UWP_CNTRL3, uwp3);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, SOF_SRCH_TO);
STB0899_SETFIELD_VAL(SOF_SEARCH_TIMEOUT, reg, config->sof_search_timeout);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_SOF_SRCH_TO, STB0899_OFF0_SOF_SRCH_TO, reg);
}
/*
* stb0899_dvbs2_config_csm_auto
* Set CSM to AUTO mode
*/
static void stb0899_dvbs2_config_csm_auto(struct stb0899_state *state)
{
u32 reg;
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, reg, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, reg);
}
static long Log2Int(int number)
{
int i;
i = 0;
while ((1 << i) <= abs(number))
i++;
if (number == 0)
i = 1;
return i - 1;
}
/*
* stb0899_dvbs2_calc_srate
* compute BTR_NOM_FREQ for the symbol rate
*/
static u32 stb0899_dvbs2_calc_srate(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u32 dec_ratio, dec_rate, decim, remain, intval, btr_nom_freq;
u32 master_clk, srate;
dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
dec_rate = Log2Int(dec_ratio);
decim = 1 << dec_rate;
master_clk = internal->master_clk / 1000;
srate = internal->srate / 1000;
if (decim <= 4) {
intval = (decim * (1 << (config->btr_nco_bits - 1))) / master_clk;
remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
} else {
intval = (1 << (config->btr_nco_bits - 1)) / (master_clk / 100) * decim / 100;
remain = (decim * (1 << (config->btr_nco_bits - 1))) % master_clk;
}
btr_nom_freq = (intval * srate) + ((remain * srate) / master_clk);
return btr_nom_freq;
}
/*
* stb0899_dvbs2_calc_dev
* compute the correction to be applied to symbol rate
*/
static u32 stb0899_dvbs2_calc_dev(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
u32 dec_ratio, correction, master_clk, srate;
dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
master_clk = internal->master_clk / 1000; /* for integer Calculation*/
srate = internal->srate / 1000; /* for integer Calculation*/
correction = (512 * master_clk) / (2 * dec_ratio * srate);
return correction;
}
/*
* stb0899_dvbs2_set_srate
* Set DVBS2 symbol rate
*/
static void stb0899_dvbs2_set_srate(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
u32 dec_ratio, dec_rate, win_sel, decim, f_sym, btr_nom_freq;
u32 correction, freq_adj, band_lim, decim_cntrl, reg;
u8 anti_alias;
/*set decimation to 1*/
dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
dec_rate = Log2Int(dec_ratio);
win_sel = 0;
if (dec_rate >= 5)
win_sel = dec_rate - 4;
decim = (1 << dec_rate);
/* (FSamp/Fsymbol *100) for integer Calculation */
f_sym = internal->master_clk / ((decim * internal->srate) / 1000);
if (f_sym <= 2250) /* don't band limit signal going into btr block*/
band_lim = 1;
else
band_lim = 0; /* band limit signal going into btr block*/
decim_cntrl = ((win_sel << 3) & 0x18) + ((band_lim << 5) & 0x20) + (dec_rate & 0x7);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DECIM_CNTRL, STB0899_OFF0_DECIM_CNTRL, decim_cntrl);
if (f_sym <= 3450)
anti_alias = 0;
else if (f_sym <= 4250)
anti_alias = 1;
else
anti_alias = 2;
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ANTI_ALIAS_SEL, STB0899_OFF0_ANTI_ALIAS_SEL, anti_alias);
btr_nom_freq = stb0899_dvbs2_calc_srate(state);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_NOM_FREQ, STB0899_OFF0_BTR_NOM_FREQ, btr_nom_freq);
correction = stb0899_dvbs2_calc_dev(state);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
STB0899_SETFIELD_VAL(BTR_FREQ_CORR, reg, correction);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
/* scale UWP+CSM frequency to sample rate*/
freq_adj = internal->srate / (internal->master_clk / 4096);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_FREQ_ADJ_SCALE, STB0899_OFF0_FREQ_ADJ_SCALE, freq_adj);
}
/*
* stb0899_dvbs2_set_btr_loopbw
* set bit timing loop bandwidth as a percentage of the symbol rate
*/
static void stb0899_dvbs2_set_btr_loopbw(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u32 sym_peak = 23, zeta = 707, loopbw_percent = 60;
s32 dec_ratio, dec_rate, k_btr1_rshft, k_btr1, k_btr0_rshft;
s32 k_btr0, k_btr2_rshft, k_direct_shift, k_indirect_shift;
u32 decim, K, wn, k_direct, k_indirect;
u32 reg;
dec_ratio = (internal->master_clk * 2) / (5 * internal->srate);
dec_ratio = (dec_ratio == 0) ? 1 : dec_ratio;
dec_rate = Log2Int(dec_ratio);
decim = (1 << dec_rate);
sym_peak *= 576000;
K = (1 << config->btr_nco_bits) / (internal->master_clk / 1000);
K *= (internal->srate / 1000000) * decim; /*k=k 10^-8*/
if (K != 0) {
K = sym_peak / K;
wn = (4 * zeta * zeta) + 1000000;
wn = (2 * (loopbw_percent * 1000) * 40 * zeta) /wn; /*wn =wn 10^-8*/
k_indirect = (wn * wn) / K; /*kindirect = kindirect 10^-6*/
k_direct = (2 * wn * zeta) / K; /*kDirect = kDirect 10^-2*/
k_direct *= 100;
k_direct_shift = Log2Int(k_direct) - Log2Int(10000) - 2;
k_btr1_rshft = (-1 * k_direct_shift) + config->btr_gain_shift_offset;
k_btr1 = k_direct / (1 << k_direct_shift);
k_btr1 /= 10000;
k_indirect_shift = Log2Int(k_indirect + 15) - 20 /*- 2*/;
k_btr0_rshft = (-1 * k_indirect_shift) + config->btr_gain_shift_offset;
k_btr0 = k_indirect * (1 << (-k_indirect_shift));
k_btr0 /= 1000000;
k_btr2_rshft = 0;
if (k_btr0_rshft > 15) {
k_btr2_rshft = k_btr0_rshft - 15;
k_btr0_rshft = 15;
}
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_LOOP_GAIN);
STB0899_SETFIELD_VAL(KBTR0_RSHFT, reg, k_btr0_rshft);
STB0899_SETFIELD_VAL(KBTR0, reg, k_btr0);
STB0899_SETFIELD_VAL(KBTR1_RSHFT, reg, k_btr1_rshft);
STB0899_SETFIELD_VAL(KBTR1, reg, k_btr1);
STB0899_SETFIELD_VAL(KBTR2_RSHFT, reg, k_btr2_rshft);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, reg);
} else
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_LOOP_GAIN, STB0899_OFF0_BTR_LOOP_GAIN, 0xc4c4f);
}
/*
* stb0899_dvbs2_set_carr_freq
* set nominal frequency for carrier search
*/
static void stb0899_dvbs2_set_carr_freq(struct stb0899_state *state, s32 carr_freq, u32 master_clk)
{
struct stb0899_config *config = state->config;
s32 crl_nom_freq;
u32 reg;
crl_nom_freq = (1 << config->crl_nco_bits) / master_clk;
crl_nom_freq *= carr_freq;
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, crl_nom_freq);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
}
/*
* stb0899_dvbs2_init_calc
* Initialize DVBS2 UWP, CSM, carrier and timing loops
*/
static void stb0899_dvbs2_init_calc(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
s32 steps, step_size;
u32 range, reg;
/* config uwp and csm */
stb0899_dvbs2_config_uwp(state);
stb0899_dvbs2_config_csm_auto(state);
/* initialize BTR */
stb0899_dvbs2_set_srate(state);
stb0899_dvbs2_set_btr_loopbw(state);
if (internal->srate / 1000000 >= 15)
step_size = (1 << 17) / 5;
else if (internal->srate / 1000000 >= 10)
step_size = (1 << 17) / 7;
else if (internal->srate / 1000000 >= 5)
step_size = (1 << 17) / 10;
else
step_size = (1 << 17) / 4;
range = internal->srch_range / 1000000;
steps = (10 * range * (1 << 17)) / (step_size * (internal->srate / 1000000));
steps = (steps + 6) / 10;
steps = (steps == 0) ? 1 : steps;
if (steps % 2 == 0)
stb0899_dvbs2_set_carr_freq(state, internal->center_freq -
(internal->step_size * (internal->srate / 20000000)),
(internal->master_clk) / 1000000);
else
stb0899_dvbs2_set_carr_freq(state, internal->center_freq, (internal->master_clk) / 1000000);
/*Set Carrier Search params (zigzag, num steps and freq step size*/
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, ACQ_CNTRL2);
STB0899_SETFIELD_VAL(ZIGZAG, reg, 1);
STB0899_SETFIELD_VAL(NUM_STEPS, reg, steps);
STB0899_SETFIELD_VAL(FREQ_STEPSIZE, reg, step_size);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQ_CNTRL2, STB0899_OFF0_ACQ_CNTRL2, reg);
}
/*
* stb0899_dvbs2_btr_init
* initialize the timing loop
*/
static void stb0899_dvbs2_btr_init(struct stb0899_state *state)
{
u32 reg;
/* set enable BTR loopback */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_CNTRL);
STB0899_SETFIELD_VAL(INTRP_PHS_SENSE, reg, 1);
STB0899_SETFIELD_VAL(BTR_ERR_ENA, reg, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_CNTRL, STB0899_OFF0_BTR_CNTRL, reg);
/* fix btr freq accum at 0 */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x10000000);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_FREQ_INIT, STB0899_OFF0_BTR_FREQ_INIT, 0x00000000);
/* fix btr freq accum at 0 */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x10000000);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_BTR_PHS_INIT, STB0899_OFF0_BTR_PHS_INIT, 0x00000000);
}
/*
* stb0899_dvbs2_reacquire
* trigger a DVB-S2 acquisition
*/
static void stb0899_dvbs2_reacquire(struct stb0899_state *state)
{
u32 reg = 0;
/* demod soft reset */
STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
/*Reset Timing Loop */
stb0899_dvbs2_btr_init(state);
/* reset Carrier loop */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, (1 << 30));
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_FREQ_INIT, STB0899_OFF0_CRL_FREQ_INIT, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_LOOP_GAIN, STB0899_OFF0_CRL_LOOP_GAIN, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, (1 << 30));
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_PHS_INIT, STB0899_OFF0_CRL_PHS_INIT, 0);
/*release demod soft reset */
reg = 0;
STB0899_SETFIELD_VAL(DVBS2_RESET, reg, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_RESET_CNTRL, STB0899_OFF0_RESET_CNTRL, reg);
/* start acquisition process */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_ACQUIRE_TRIG, STB0899_OFF0_ACQUIRE_TRIG, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_LOCK_LOST, STB0899_OFF0_LOCK_LOST, 0);
/* equalizer Init */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 1);
/*Start equilizer */
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQUALIZER_INIT, STB0899_OFF0_EQUALIZER_INIT, 0);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0);
STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 0);
STB0899_SETFIELD_VAL(EQ_DELAY, reg, 0x05);
STB0899_SETFIELD_VAL(EQ_ADAPT_MODE, reg, 0x01);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
/* RESET Packet delineator */
stb0899_write_reg(state, STB0899_PDELCTRL, 0x4a);
}
/*
* stb0899_dvbs2_get_dmd_status
* get DVB-S2 Demod LOCK status
*/
static enum stb0899_status stb0899_dvbs2_get_dmd_status(struct stb0899_state *state, int timeout)
{
int time = -10, lock = 0, uwp, csm;
u32 reg;
do {
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STATUS);
dprintk(state->verbose, FE_DEBUG, 1, "DMD_STATUS=[0x%02x]", reg);
if (STB0899_GETFIELD(IF_AGC_LOCK, reg))
dprintk(state->verbose, FE_DEBUG, 1, "------------->IF AGC LOCKED !");
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_STAT2);
dprintk(state->verbose, FE_DEBUG, 1, "----------->DMD STAT2=[0x%02x]", reg);
uwp = STB0899_GETFIELD(UWP_LOCK, reg);
csm = STB0899_GETFIELD(CSM_LOCK, reg);
if (uwp && csm)
lock = 1;
time += 10;
msleep(10);
} while ((!lock) && (time <= timeout));
if (lock) {
dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 LOCK !");
return DVBS2_DEMOD_LOCK;
} else {
return DVBS2_DEMOD_NOLOCK;
}
}
/*
* stb0899_dvbs2_get_data_lock
* get FEC status
*/
static int stb0899_dvbs2_get_data_lock(struct stb0899_state *state, int timeout)
{
int time = 0, lock = 0;
u8 reg;
while ((!lock) && (time < timeout)) {
reg = stb0899_read_reg(state, STB0899_CFGPDELSTATUS1);
dprintk(state->verbose, FE_DEBUG, 1, "---------> CFGPDELSTATUS=[0x%02x]", reg);
lock = STB0899_GETFIELD(CFGPDELSTATUS_LOCK, reg);
time++;
}
return lock;
}
/*
* stb0899_dvbs2_get_fec_status
* get DVB-S2 FEC LOCK status
*/
static enum stb0899_status stb0899_dvbs2_get_fec_status(struct stb0899_state *state, int timeout)
{
int time = 0, Locked;
do {
Locked = stb0899_dvbs2_get_data_lock(state, 1);
time++;
msleep(1);
} while ((!Locked) && (time < timeout));
if (Locked) {
dprintk(state->verbose, FE_DEBUG, 1, "---------->DVB-S2 FEC LOCK !");
return DVBS2_FEC_LOCK;
} else {
return DVBS2_FEC_NOLOCK;
}
}
/*
* stb0899_dvbs2_init_csm
* set parameters for manual mode
*/
static void stb0899_dvbs2_init_csm(struct stb0899_state *state, int pilots, enum stb0899_modcod modcod)
{
struct stb0899_internal *internal = &state->internal;
s32 dvt_tbl = 1, two_pass = 0, agc_gain = 6, agc_shift = 0, loop_shift = 0, phs_diff_thr = 0x80;
s32 gamma_acq, gamma_rho_acq, gamma_trk, gamma_rho_trk, lock_count_thr;
u32 csm1, csm2, csm3, csm4;
if (((internal->master_clk / internal->srate) <= 4) && (modcod <= 11) && (pilots == 1)) {
switch (modcod) {
case STB0899_QPSK_12:
gamma_acq = 25;
gamma_rho_acq = 2700;
gamma_trk = 12;
gamma_rho_trk = 180;
lock_count_thr = 8;
break;
case STB0899_QPSK_35:
gamma_acq = 38;
gamma_rho_acq = 7182;
gamma_trk = 14;
gamma_rho_trk = 308;
lock_count_thr = 8;
break;
case STB0899_QPSK_23:
gamma_acq = 42;
gamma_rho_acq = 9408;
gamma_trk = 17;
gamma_rho_trk = 476;
lock_count_thr = 8;
break;
case STB0899_QPSK_34:
gamma_acq = 53;
gamma_rho_acq = 16642;
gamma_trk = 19;
gamma_rho_trk = 646;
lock_count_thr = 8;
break;
case STB0899_QPSK_45:
gamma_acq = 53;
gamma_rho_acq = 17119;
gamma_trk = 22;
gamma_rho_trk = 880;
lock_count_thr = 8;
break;
case STB0899_QPSK_56:
gamma_acq = 55;
gamma_rho_acq = 19250;
gamma_trk = 23;
gamma_rho_trk = 989;
lock_count_thr = 8;
break;
case STB0899_QPSK_89:
gamma_acq = 60;
gamma_rho_acq = 24240;
gamma_trk = 24;
gamma_rho_trk = 1176;
lock_count_thr = 8;
break;
case STB0899_QPSK_910:
gamma_acq = 66;
gamma_rho_acq = 29634;
gamma_trk = 24;
gamma_rho_trk = 1176;
lock_count_thr = 8;
break;
default:
gamma_acq = 66;
gamma_rho_acq = 29634;
gamma_trk = 24;
gamma_rho_trk = 1176;
lock_count_thr = 8;
break;
}
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_AUTO_PARAM, csm1, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
csm2 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL2);
csm3 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL3);
csm4 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL4);
STB0899_SETFIELD_VAL(CSM_DVT_TABLE, csm1, dvt_tbl);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, two_pass);
STB0899_SETFIELD_VAL(CSM_AGC_GAIN, csm1, agc_gain);
STB0899_SETFIELD_VAL(CSM_AGC_SHIFT, csm1, agc_shift);
STB0899_SETFIELD_VAL(FE_LOOP_SHIFT, csm1, loop_shift);
STB0899_SETFIELD_VAL(CSM_GAMMA_ACQ, csm2, gamma_acq);
STB0899_SETFIELD_VAL(CSM_GAMMA_RHOACQ, csm2, gamma_rho_acq);
STB0899_SETFIELD_VAL(CSM_GAMMA_TRACK, csm3, gamma_trk);
STB0899_SETFIELD_VAL(CSM_GAMMA_RHOTRACK, csm3, gamma_rho_trk);
STB0899_SETFIELD_VAL(CSM_LOCKCOUNT_THRESH, csm4, lock_count_thr);
STB0899_SETFIELD_VAL(CSM_PHASEDIFF_THRESH, csm4, phs_diff_thr);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL2, STB0899_OFF0_CSM_CNTRL2, csm2);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL3, STB0899_OFF0_CSM_CNTRL3, csm3);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL4, STB0899_OFF0_CSM_CNTRL4, csm4);
}
}
/*
* stb0899_dvbs2_get_srate
* get DVB-S2 Symbol Rate
*/
static u32 stb0899_dvbs2_get_srate(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
struct stb0899_config *config = state->config;
u32 bTrNomFreq, srate, decimRate, intval1, intval2, reg;
int div1, div2, rem1, rem2;
div1 = config->btr_nco_bits / 2;
div2 = config->btr_nco_bits - div1 - 1;
bTrNomFreq = STB0899_READ_S2REG(STB0899_S2DEMOD, BTR_NOM_FREQ);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DECIM_CNTRL);
decimRate = STB0899_GETFIELD(DECIM_RATE, reg);
decimRate = (1 << decimRate);
intval1 = internal->master_clk / (1 << div1);
intval2 = bTrNomFreq / (1 << div2);
rem1 = internal->master_clk % (1 << div1);
rem2 = bTrNomFreq % (1 << div2);
/* only for integer calculation */
srate = (intval1 * intval2) + ((intval1 * rem2) / (1 << div2)) + ((intval2 * rem1) / (1 << div1));
srate /= decimRate; /*symbrate = (btrnomfreq_register_val*MasterClock)/2^(27+decim_rate_field) */
return srate;
}
/*
* stb0899_dvbs2_algo
* Search for signal, timing, carrier and data for a given
* frequency in a given range
*/
enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state)
{
struct stb0899_internal *internal = &state->internal;
enum stb0899_modcod modcod;
s32 offsetfreq, searchTime, FecLockTime, pilots, iqSpectrum;
int i = 0;
u32 reg, csm1;
if (internal->srate <= 2000000) {
searchTime = 5000; /* 5000 ms max time to lock UWP and CSM, SYMB <= 2Mbs */
FecLockTime = 350; /* 350 ms max time to lock FEC, SYMB <= 2Mbs */
} else if (internal->srate <= 5000000) {
searchTime = 2500; /* 2500 ms max time to lock UWP and CSM, 2Mbs < SYMB <= 5Mbs */
FecLockTime = 170; /* 170 ms max time to lock FEC, 2Mbs< SYMB <= 5Mbs */
} else if (internal->srate <= 10000000) {
searchTime = 1500; /* 1500 ms max time to lock UWP and CSM, 5Mbs <SYMB <= 10Mbs */
FecLockTime = 80; /* 80 ms max time to lock FEC, 5Mbs< SYMB <= 10Mbs */
} else if (internal->srate <= 15000000) {
searchTime = 500; /* 500 ms max time to lock UWP and CSM, 10Mbs <SYMB <= 15Mbs */
FecLockTime = 50; /* 50 ms max time to lock FEC, 10Mbs< SYMB <= 15Mbs */
} else if (internal->srate <= 20000000) {
searchTime = 300; /* 300 ms max time to lock UWP and CSM, 15Mbs < SYMB <= 20Mbs */
FecLockTime = 30; /* 50 ms max time to lock FEC, 15Mbs< SYMB <= 20Mbs */
} else if (internal->srate <= 25000000) {
searchTime = 250; /* 250 ms max time to lock UWP and CSM, 20 Mbs < SYMB <= 25Mbs */
FecLockTime = 25; /* 25 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs */
} else {
searchTime = 150; /* 150 ms max time to lock UWP and CSM, SYMB > 25Mbs */
FecLockTime = 20; /* 20 ms max time to lock FEC, 20Mbs< SYMB <= 25Mbs */
}
/* Maintain Stream Merger in reset during acquisition */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 1);
stb0899_write_reg(state, STB0899_TSTRES, reg);
/* enable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 1);
/* Move tuner to frequency */
if (state->config->tuner_set_frequency)
state->config->tuner_set_frequency(&state->frontend, internal->freq);
if (state->config->tuner_get_frequency)
state->config->tuner_get_frequency(&state->frontend, &internal->freq);
/* disable tuner I/O */
stb0899_i2c_gate_ctrl(&state->frontend, 0);
/* Set IF AGC to acquisition */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 4);
STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 32);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
/* Initialisation */
stb0899_dvbs2_init_calc(state);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
switch (internal->inversion) {
case IQ_SWAP_OFF:
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 0);
break;
case IQ_SWAP_ON:
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, 1);
break;
}
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
stb0899_dvbs2_reacquire(state);
/* Wait for demod lock (UWP and CSM) */
internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
if (internal->status == DVBS2_DEMOD_LOCK) {
dprintk(state->verbose, FE_DEBUG, 1, "------------> DVB-S2 DEMOD LOCK !");
i = 0;
/* Demod Locked, check FEC status */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
/*If false lock (UWP and CSM Locked but no FEC) try 3 time max*/
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
/* Read the frequency offset*/
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
/* Set the Nominal frequency to the found frequency offset for the next reacquire*/
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
stb0899_dvbs2_reacquire(state);
internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
i++;
}
}
if (internal->status != DVBS2_FEC_LOCK) {
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
iqSpectrum = STB0899_GETFIELD(SPECTRUM_INVERT, reg);
/* IQ Spectrum Inversion */
STB0899_SETFIELD_VAL(SPECTRUM_INVERT, reg, !iqSpectrum);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_DMD_CNTRL2, STB0899_OFF0_DMD_CNTRL2, reg);
/* start acquistion process */
stb0899_dvbs2_reacquire(state);
/* Wait for demod lock (UWP and CSM) */
internal->status = stb0899_dvbs2_get_dmd_status(state, searchTime);
if (internal->status == DVBS2_DEMOD_LOCK) {
i = 0;
/* Demod Locked, check FEC */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
/*try thrice for false locks, (UWP and CSM Locked but no FEC) */
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
/* Read the frequency offset*/
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
/* Set the Nominal frequency to the found frequency offset for the next reacquire*/
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_NOM_FREQ);
STB0899_SETFIELD_VAL(CRL_NOM_FREQ, reg, offsetfreq);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CRL_NOM_FREQ, STB0899_OFF0_CRL_NOM_FREQ, reg);
stb0899_dvbs2_reacquire(state);
internal->status = stb0899_dvbs2_get_fec_status(state, searchTime);
i++;
}
}
/*
if (pParams->DVBS2State == FE_DVBS2_FEC_LOCKED)
pParams->IQLocked = !iqSpectrum;
*/
}
if (internal->status == DVBS2_FEC_LOCK) {
dprintk(state->verbose, FE_DEBUG, 1, "----------------> DVB-S2 FEC Lock !");
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
(INRANGE(STB0899_QPSK_23, modcod, STB0899_QPSK_910)) &&
(pilots == 1)) {
stb0899_dvbs2_init_csm(state, pilots, modcod);
/* Wait for UWP,CSM and data LOCK 20ms max */
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
i = 0;
while ((internal->status != DVBS2_FEC_LOCK) && (i < 3)) {
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
csm1 = STB0899_READ_S2REG(STB0899_S2DEMOD, CSM_CNTRL1);
STB0899_SETFIELD_VAL(CSM_TWO_PASS, csm1, 0);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_CSM_CNTRL1, STB0899_OFF0_CSM_CNTRL1, csm1);
internal->status = stb0899_dvbs2_get_fec_status(state, FecLockTime);
i++;
}
}
if ((((10 * internal->master_clk) / (internal->srate / 10)) <= 410) &&
(INRANGE(STB0899_QPSK_12, modcod, STB0899_QPSK_35)) &&
(pilots == 1)) {
/* Equalizer Disable update */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_DISABLE_UPDATE, reg, 1);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
}
/* slow down the Equalizer once locked */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, EQ_CNTRL);
STB0899_SETFIELD_VAL(EQ_SHIFT, reg, 0x02);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_EQ_CNTRL, STB0899_OFF0_EQ_CNTRL, reg);
/* Store signal parameters */
offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
offsetfreq = sign_extend32(offsetfreq, 29);
offsetfreq = offsetfreq / ((1 << 30) / 1000);
offsetfreq *= (internal->master_clk / 1000000);
/* store current inversion for next run */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, DMD_CNTRL2);
if (STB0899_GETFIELD(SPECTRUM_INVERT, reg))
internal->inversion = IQ_SWAP_ON;
else
internal->inversion = IQ_SWAP_OFF;
internal->freq = internal->freq + offsetfreq;
internal->srate = stb0899_dvbs2_get_srate(state);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, UWP_STAT2);
internal->modcod = STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 2;
internal->pilots = STB0899_GETFIELD(UWP_DECODE_MOD, reg) & 0x01;
internal->frame_length = (STB0899_GETFIELD(UWP_DECODE_MOD, reg) >> 1) & 0x01;
/* Set IF AGC to tracking */
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL);
STB0899_SETFIELD_VAL(IF_LOOP_GAIN, reg, 3);
/* if QPSK 1/2,QPSK 3/5 or QPSK 2/3 set IF AGC reference to 16 otherwise 32*/
if (INRANGE(STB0899_QPSK_12, internal->modcod, STB0899_QPSK_23))
STB0899_SETFIELD_VAL(IF_AGC_REF, reg, 16);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL, STB0899_OFF0_IF_AGC_CNTRL, reg);
reg = STB0899_READ_S2REG(STB0899_S2DEMOD, IF_AGC_CNTRL2);
STB0899_SETFIELD_VAL(IF_AGC_DUMP_PER, reg, 7);
stb0899_write_s2reg(state, STB0899_S2DEMOD, STB0899_BASE_IF_AGC_CNTRL2, STB0899_OFF0_IF_AGC_CNTRL2, reg);
}
/* Release Stream Merger Reset */
reg = stb0899_read_reg(state, STB0899_TSTRES);
STB0899_SETFIELD_VAL(FRESRS, reg, 0);
stb0899_write_reg(state, STB0899_TSTRES, reg);
return internal->status;
}
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