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stv090x.c

/*
      STV0900/0903 Multistandard Broadcast Frontend driver
      Copyright (C) Manu Abraham <abraham.manu@gmail.com>

      Copyright (C) ST Microelectronics

      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.
*/

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/mutex.h>

#include <linux/dvb/frontend.h>
#include "dvb_frontend.h"

#include "stv6110x.h" /* for demodulator internal modes */

#include "stv090x_reg.h"
#include "stv090x.h"
#include "stv090x_priv.h"

static unsigned int verbose;
module_param(verbose, int, 0644);

struct mutex demod_lock;

/* DVBS1 and DSS C/N Lookup table */
static const struct stv090x_tab stv090x_s1cn_tab[] = {
      {   0, 8917 }, /*  0.0dB */
      {   5, 8801 }, /*  0.5dB */
      {  10, 8667 }, /*  1.0dB */
      {  15, 8522 }, /*  1.5dB */
      {  20, 8355 }, /*  2.0dB */
      {  25, 8175 }, /*  2.5dB */
      {  30, 7979 }, /*  3.0dB */
      {  35, 7763 }, /*  3.5dB */
      {  40, 7530 }, /*  4.0dB */
      {  45, 7282 }, /*  4.5dB */
      {  50, 7026 }, /*  5.0dB */
      {  55, 6781 }, /*  5.5dB */
      {  60, 6514 }, /*  6.0dB */
      {  65, 6241 }, /*  6.5dB */
      {  70, 5965 }, /*  7.0dB */
      {  75, 5690 }, /*  7.5dB */
      {  80, 5424 }, /*  8.0dB */
      {  85, 5161 }, /*  8.5dB */
      {  90, 4902 }, /*  9.0dB */
      {  95, 4654 }, /*  9.5dB */
      { 100, 4417 }, /* 10.0dB */
      { 105, 4186 }, /* 10.5dB */
      { 110, 3968 }, /* 11.0dB */
      { 115, 3757 }, /* 11.5dB */
      { 120, 3558 }, /* 12.0dB */
      { 125, 3366 }, /* 12.5dB */
      { 130, 3185 }, /* 13.0dB */
      { 135, 3012 }, /* 13.5dB */
      { 140, 2850 }, /* 14.0dB */
      { 145, 2698 }, /* 14.5dB */
      { 150, 2550 }, /* 15.0dB */
      { 160, 2283 }, /* 16.0dB */
      { 170, 2042 }, /* 17.0dB */
      { 180, 1827 }, /* 18.0dB */
      { 190, 1636 }, /* 19.0dB */
      { 200, 1466 }, /* 20.0dB */
      { 210, 1315 }, /* 21.0dB */
      { 220, 1181 }, /* 22.0dB */
      { 230, 1064 }, /* 23.0dB */
      { 240,      960 }, /* 24.0dB */
      { 250,      869 }, /* 25.0dB */
      { 260,      792 }, /* 26.0dB */
      { 270,      724 }, /* 27.0dB */
      { 280,      665 }, /* 28.0dB */
      { 290,      616 }, /* 29.0dB */
      { 300,      573 }, /* 30.0dB */
      { 310,      537 }, /* 31.0dB */
      { 320,      507 }, /* 32.0dB */
      { 330,      483 }, /* 33.0dB */
      { 400,      398 }, /* 40.0dB */
      { 450,      381 }, /* 45.0dB */
      { 500,      377 }  /* 50.0dB */
};

/* DVBS2 C/N Lookup table */
static const struct stv090x_tab stv090x_s2cn_tab[] = {
      { -30, 13348 }, /* -3.0dB */
      { -20, 12640 }, /* -2d.0B */
      { -10, 11883 }, /* -1.0dB */
      {   0, 11101 }, /* -0.0dB */
      {   5, 10718 }, /*  0.5dB */
      {  10, 10339 }, /*  1.0dB */
      {  15,  9947 }, /*  1.5dB */
      {  20,  9552 }, /*  2.0dB */
      {  25,  9183 }, /*  2.5dB */
      {  30,  8799 }, /*  3.0dB */
      {  35,  8422 }, /*  3.5dB */
      {  40,  8062 }, /*  4.0dB */
      {  45,  7707 }, /*  4.5dB */
      {  50,  7353 }, /*  5.0dB */
      {  55,  7025 }, /*  5.5dB */
      {  60,  6684 }, /*  6.0dB */
      {  65,  6331 }, /*  6.5dB */
      {  70,  6036 }, /*  7.0dB */
      {  75,  5727 }, /*  7.5dB */
      {  80,  5437 }, /*  8.0dB */
      {  85,  5164 }, /*  8.5dB */
      {  90,  4902 }, /*  9.0dB */
      {  95,  4653 }, /*  9.5dB */
      { 100,  4408 }, /* 10.0dB */
      { 105,  4187 }, /* 10.5dB */
      { 110,  3961 }, /* 11.0dB */
      { 115,  3751 }, /* 11.5dB */
      { 120,  3558 }, /* 12.0dB */
      { 125,  3368 }, /* 12.5dB */
      { 130,  3191 }, /* 13.0dB */
      { 135,  3017 }, /* 13.5dB */
      { 140,  2862 }, /* 14.0dB */
      { 145,  2710 }, /* 14.5dB */
      { 150,  2565 }, /* 15.0dB */
      { 160,  2300 }, /* 16.0dB */
      { 170,  2058 }, /* 17.0dB */
      { 180,  1849 }, /* 18.0dB */
      { 190,  1663 }, /* 19.0dB */
      { 200,  1495 }, /* 20.0dB */
      { 210,  1349 }, /* 21.0dB */
      { 220,  1222 }, /* 22.0dB */
      { 230,  1110 }, /* 23.0dB */
      { 240,  1011 }, /* 24.0dB */
      { 250,   925 }, /* 25.0dB */
      { 260,   853 }, /* 26.0dB */
      { 270,   789 }, /* 27.0dB */
      { 280,   734 }, /* 28.0dB */
      { 290,   690 }, /* 29.0dB */
      { 300,   650 }, /* 30.0dB */
      { 310,   619 }, /* 31.0dB */
      { 320,   593 }, /* 32.0dB */
      { 330,   571 }, /* 33.0dB */
      { 400,   498 }, /* 40.0dB */
      { 450,       484 }, /* 45.0dB */
      { 500,       481 }      /* 50.0dB */
};

/* RF level C/N lookup table */
static const struct stv090x_tab stv090x_rf_tab[] = {
      {  -5, 0xcaa1 }, /*  -5dBm */
      { -10, 0xc229 }, /* -10dBm */
      { -15, 0xbb08 }, /* -15dBm */
      { -20, 0xb4bc }, /* -20dBm */
      { -25, 0xad5a }, /* -25dBm */
      { -30, 0xa298 }, /* -30dBm */
      { -35, 0x98a8 }, /* -35dBm */
      { -40, 0x8389 }, /* -40dBm */
      { -45, 0x59be }, /* -45dBm */
      { -50, 0x3a14 }, /* -50dBm */
      { -55, 0x2d11 }, /* -55dBm */
      { -60, 0x210d }, /* -60dBm */
      { -65, 0xa14f }, /* -65dBm */
      { -70, 0x07aa }    /* -70dBm */
};


static struct stv090x_reg stv0900_initval[] = {

      { STV090x_OUTCFG,       0x00 },
      { STV090x_MODECFG,            0xff },
      { STV090x_AGCRF1CFG,          0x11 },
      { STV090x_AGCRF2CFG,          0x13 },
      { STV090x_TSGENERAL1X,        0x14 },
      { STV090x_TSTTNR2,            0x21 },
      { STV090x_TSTTNR4,            0x21 },
      { STV090x_P2_DISTXCTL,        0x22 },
      { STV090x_P2_F22TX,           0xc0 },
      { STV090x_P2_F22RX,           0xc0 },
      { STV090x_P2_DISRXCTL,        0x00 },
      { STV090x_P2_DMDCFGMD,        0xF9 },
      { STV090x_P2_DEMOD,           0x08 },
      { STV090x_P2_DMDCFG3,         0xc4 },
      { STV090x_P2_CARFREQ,         0xed },
      { STV090x_P2_LDT,       0xd0 },
      { STV090x_P2_LDT2,            0xb8 },
      { STV090x_P2_TMGCFG,          0xd2 },
      { STV090x_P2_TMGTHRISE,       0x20 },
      { STV090x_P1_TMGCFG,          0xd2 },

      { STV090x_P2_TMGTHFALL,       0x00 },
      { STV090x_P2_FECSPY,          0x88 },
      { STV090x_P2_FSPYDATA,        0x3a },
      { STV090x_P2_FBERCPT4,        0x00 },
      { STV090x_P2_FSPYBER,         0x10 },
      { STV090x_P2_ERRCTRL1,        0x35 },
      { STV090x_P2_ERRCTRL2,        0xc1 },
      { STV090x_P2_CFRICFG,         0xf8 },
      { STV090x_P2_NOSCFG,          0x1c },
      { STV090x_P2_DMDTOM,          0x20 },
      { STV090x_P2_CORRELMANT,      0x70 },
      { STV090x_P2_CORRELABS,       0x88 },
      { STV090x_P2_AGC2O,           0x5b },
      { STV090x_P2_AGC2REF,         0x38 },
      { STV090x_P2_CARCFG,          0xe4 },
      { STV090x_P2_ACLC,            0x1A },
      { STV090x_P2_BCLC,            0x09 },
      { STV090x_P2_CARHDR,          0x08 },
      { STV090x_P2_KREFTMG,         0xc1 },
      { STV090x_P2_SFRUPRATIO,      0xf0 },
      { STV090x_P2_SFRLOWRATIO,     0x70 },
      { STV090x_P2_SFRSTEP,         0x58 },
      { STV090x_P2_TMGCFG2,         0x01 },
      { STV090x_P2_CAR2CFG,         0x26 },
      { STV090x_P2_BCLC2S2Q,        0x86 },
      { STV090x_P2_BCLC2S28,        0x86 },
      { STV090x_P2_SMAPCOEF7,       0x77 },
      { STV090x_P2_SMAPCOEF6,       0x85 },
      { STV090x_P2_SMAPCOEF5,       0x77 },
      { STV090x_P2_TSCFGL,          0x20 },
      { STV090x_P2_DMDCFG2,         0x3b },
      { STV090x_P2_MODCODLST0,      0xff },
      { STV090x_P2_MODCODLST1,      0xff },
      { STV090x_P2_MODCODLST2,      0xff },
      { STV090x_P2_MODCODLST3,      0xff },
      { STV090x_P2_MODCODLST4,      0xff },
      { STV090x_P2_MODCODLST5,      0xff },
      { STV090x_P2_MODCODLST6,      0xff },
      { STV090x_P2_MODCODLST7,      0xcc },
      { STV090x_P2_MODCODLST8,      0xcc },
      { STV090x_P2_MODCODLST9,      0xcc },
      { STV090x_P2_MODCODLSTA,      0xcc },
      { STV090x_P2_MODCODLSTB,      0xcc },
      { STV090x_P2_MODCODLSTC,      0xcc },
      { STV090x_P2_MODCODLSTD,      0xcc },
      { STV090x_P2_MODCODLSTE,      0xcc },
      { STV090x_P2_MODCODLSTF,      0xcf },
      { STV090x_P1_DISTXCTL,        0x22 },
      { STV090x_P1_F22TX,           0xc0 },
      { STV090x_P1_F22RX,           0xc0 },
      { STV090x_P1_DISRXCTL,        0x00 },
      { STV090x_P1_DMDCFGMD,        0xf9 },
      { STV090x_P1_DEMOD,           0x08 },
      { STV090x_P1_DMDCFG3,         0xc4 },
      { STV090x_P1_DMDTOM,          0x20 },
      { STV090x_P1_CARFREQ,         0xed },
      { STV090x_P1_LDT,       0xd0 },
      { STV090x_P1_LDT2,            0xb8 },
      { STV090x_P1_TMGCFG,          0xd2 },
      { STV090x_P1_TMGTHRISE,       0x20 },
      { STV090x_P1_TMGTHFALL,       0x00 },
      { STV090x_P1_SFRUPRATIO,      0xf0 },
      { STV090x_P1_SFRLOWRATIO,     0x70 },
      { STV090x_P1_TSCFGL,          0x20 },
      { STV090x_P1_FECSPY,          0x88 },
      { STV090x_P1_FSPYDATA,        0x3a },
      { STV090x_P1_FBERCPT4,        0x00 },
      { STV090x_P1_FSPYBER,         0x10 },
      { STV090x_P1_ERRCTRL1,        0x35 },
      { STV090x_P1_ERRCTRL2,        0xc1 },
      { STV090x_P1_CFRICFG,         0xf8 },
      { STV090x_P1_NOSCFG,          0x1c },
      { STV090x_P1_CORRELMANT,      0x70 },
      { STV090x_P1_CORRELABS,       0x88 },
      { STV090x_P1_AGC2O,           0x5b },
      { STV090x_P1_AGC2REF,         0x38 },
      { STV090x_P1_CARCFG,          0xe4 },
      { STV090x_P1_ACLC,            0x1A },
      { STV090x_P1_BCLC,            0x09 },
      { STV090x_P1_CARHDR,          0x08 },
      { STV090x_P1_KREFTMG,         0xc1 },
      { STV090x_P1_SFRSTEP,         0x58 },
      { STV090x_P1_TMGCFG2,         0x01 },
      { STV090x_P1_CAR2CFG,         0x26 },
      { STV090x_P1_BCLC2S2Q,        0x86 },
      { STV090x_P1_BCLC2S28,        0x86 },
      { STV090x_P1_SMAPCOEF7,       0x77 },
      { STV090x_P1_SMAPCOEF6,       0x85 },
      { STV090x_P1_SMAPCOEF5,       0x77 },
      { STV090x_P1_DMDCFG2,         0x3b },
      { STV090x_P1_MODCODLST0,      0xff },
      { STV090x_P1_MODCODLST1,      0xff },
      { STV090x_P1_MODCODLST2,      0xff },
      { STV090x_P1_MODCODLST3,      0xff },
      { STV090x_P1_MODCODLST4,      0xff },
      { STV090x_P1_MODCODLST5,      0xff },
      { STV090x_P1_MODCODLST6,      0xff },
      { STV090x_P1_MODCODLST7,      0xcc },
      { STV090x_P1_MODCODLST8,      0xcc },
      { STV090x_P1_MODCODLST9,      0xcc },
      { STV090x_P1_MODCODLSTA,      0xcc },
      { STV090x_P1_MODCODLSTB,      0xcc },
      { STV090x_P1_MODCODLSTC,      0xcc },
      { STV090x_P1_MODCODLSTD,      0xcc },
      { STV090x_P1_MODCODLSTE,      0xcc },
      { STV090x_P1_MODCODLSTF,      0xcf },
      { STV090x_GENCFG,       0x1d },
      { STV090x_NBITER_NF4,         0x37 },
      { STV090x_NBITER_NF5,         0x29 },
      { STV090x_NBITER_NF6,         0x37 },
      { STV090x_NBITER_NF7,         0x33 },
      { STV090x_NBITER_NF8,         0x31 },
      { STV090x_NBITER_NF9,         0x2f },
      { STV090x_NBITER_NF10,        0x39 },
      { STV090x_NBITER_NF11,        0x3a },
      { STV090x_NBITER_NF12,        0x29 },
      { STV090x_NBITER_NF13,        0x37 },
      { STV090x_NBITER_NF14,        0x33 },
      { STV090x_NBITER_NF15,        0x2f },
      { STV090x_NBITER_NF16,        0x39 },
      { STV090x_NBITER_NF17,        0x3a },
      { STV090x_NBITERNOERR,        0x04 },
      { STV090x_GAINLLR_NF4,        0x0C },
      { STV090x_GAINLLR_NF5,        0x0F },
      { STV090x_GAINLLR_NF6,        0x11 },
      { STV090x_GAINLLR_NF7,        0x14 },
      { STV090x_GAINLLR_NF8,        0x17 },
      { STV090x_GAINLLR_NF9,        0x19 },
      { STV090x_GAINLLR_NF10,       0x20 },
      { STV090x_GAINLLR_NF11,       0x21 },
      { STV090x_GAINLLR_NF12,       0x0D },
      { STV090x_GAINLLR_NF13,       0x0F },
      { STV090x_GAINLLR_NF14,       0x13 },
      { STV090x_GAINLLR_NF15,       0x1A },
      { STV090x_GAINLLR_NF16,       0x1F },
      { STV090x_GAINLLR_NF17,       0x21 },
      { STV090x_RCCFGH,       0x20 },
      { STV090x_P1_FECM,            0x01 }, /* disable DSS modes */
      { STV090x_P2_FECM,            0x01 }, /* disable DSS modes */
      { STV090x_P1_PRVIT,           0x2F }, /* disable PR 6/7 */
      { STV090x_P2_PRVIT,           0x2F }, /* disable PR 6/7 */
};

static struct stv090x_reg stv0903_initval[] = {
      { STV090x_OUTCFG,       0x00 },
      { STV090x_AGCRF1CFG,          0x11 },
      { STV090x_STOPCLK1,           0x48 },
      { STV090x_STOPCLK2,           0x14 },
      { STV090x_TSTTNR1,            0x27 },
      { STV090x_TSTTNR2,            0x21 },
      { STV090x_P1_DISTXCTL,        0x22 },
      { STV090x_P1_F22TX,           0xc0 },
      { STV090x_P1_F22RX,           0xc0 },
      { STV090x_P1_DISRXCTL,        0x00 },
      { STV090x_P1_DMDCFGMD,        0xF9 },
      { STV090x_P1_DEMOD,           0x08 },
      { STV090x_P1_DMDCFG3,         0xc4 },
      { STV090x_P1_CARFREQ,         0xed },
      { STV090x_P1_TNRCFG2,         0x82 },
      { STV090x_P1_LDT,       0xd0 },
      { STV090x_P1_LDT2,            0xb8 },
      { STV090x_P1_TMGCFG,          0xd2 },
      { STV090x_P1_TMGTHRISE,       0x20 },
      { STV090x_P1_TMGTHFALL,       0x00 },
      { STV090x_P1_SFRUPRATIO,      0xf0 },
      { STV090x_P1_SFRLOWRATIO,     0x70 },
      { STV090x_P1_TSCFGL,          0x20 },
      { STV090x_P1_FECSPY,          0x88 },
      { STV090x_P1_FSPYDATA,        0x3a },
      { STV090x_P1_FBERCPT4,        0x00 },
      { STV090x_P1_FSPYBER,         0x10 },
      { STV090x_P1_ERRCTRL1,        0x35 },
      { STV090x_P1_ERRCTRL2,        0xc1 },
      { STV090x_P1_CFRICFG,         0xf8 },
      { STV090x_P1_NOSCFG,          0x1c },
      { STV090x_P1_DMDTOM,          0x20 },
      { STV090x_P1_CORRELMANT,      0x70 },
      { STV090x_P1_CORRELABS,       0x88 },
      { STV090x_P1_AGC2O,           0x5b },
      { STV090x_P1_AGC2REF,         0x38 },
      { STV090x_P1_CARCFG,          0xe4 },
      { STV090x_P1_ACLC,            0x1A },
      { STV090x_P1_BCLC,            0x09 },
      { STV090x_P1_CARHDR,          0x08 },
      { STV090x_P1_KREFTMG,         0xc1 },
      { STV090x_P1_SFRSTEP,         0x58 },
      { STV090x_P1_TMGCFG2,         0x01 },
      { STV090x_P1_CAR2CFG,         0x26 },
      { STV090x_P1_BCLC2S2Q,        0x86 },
      { STV090x_P1_BCLC2S28,        0x86 },
      { STV090x_P1_SMAPCOEF7,       0x77 },
      { STV090x_P1_SMAPCOEF6,       0x85 },
      { STV090x_P1_SMAPCOEF5,       0x77 },
      { STV090x_P1_DMDCFG2,         0x3b },
      { STV090x_P1_MODCODLST0,      0xff },
      { STV090x_P1_MODCODLST1,      0xff },
      { STV090x_P1_MODCODLST2,      0xff },
      { STV090x_P1_MODCODLST3,      0xff },
      { STV090x_P1_MODCODLST4,      0xff },
      { STV090x_P1_MODCODLST5,      0xff },
      { STV090x_P1_MODCODLST6,      0xff },
      { STV090x_P1_MODCODLST7,      0xcc },
      { STV090x_P1_MODCODLST8,      0xcc },
      { STV090x_P1_MODCODLST9,      0xcc },
      { STV090x_P1_MODCODLSTA,      0xcc },
      { STV090x_P1_MODCODLSTB,      0xcc },
      { STV090x_P1_MODCODLSTC,      0xcc },
      { STV090x_P1_MODCODLSTD,      0xcc },
      { STV090x_P1_MODCODLSTE,      0xcc },
      { STV090x_P1_MODCODLSTF,      0xcf },
      { STV090x_GENCFG,       0x1c },
      { STV090x_NBITER_NF4,         0x37 },
      { STV090x_NBITER_NF5,         0x29 },
      { STV090x_NBITER_NF6,         0x37 },
      { STV090x_NBITER_NF7,         0x33 },
      { STV090x_NBITER_NF8,         0x31 },
      { STV090x_NBITER_NF9,         0x2f },
      { STV090x_NBITER_NF10,        0x39 },
      { STV090x_NBITER_NF11,        0x3a },
      { STV090x_NBITER_NF12,        0x29 },
      { STV090x_NBITER_NF13,        0x37 },
      { STV090x_NBITER_NF14,        0x33 },
      { STV090x_NBITER_NF15,        0x2f },
      { STV090x_NBITER_NF16,        0x39 },
      { STV090x_NBITER_NF17,        0x3a },
      { STV090x_NBITERNOERR,        0x04 },
      { STV090x_GAINLLR_NF4,        0x0C },
      { STV090x_GAINLLR_NF5,        0x0F },
      { STV090x_GAINLLR_NF6,        0x11 },
      { STV090x_GAINLLR_NF7,        0x14 },
      { STV090x_GAINLLR_NF8,        0x17 },
      { STV090x_GAINLLR_NF9,        0x19 },
      { STV090x_GAINLLR_NF10,       0x20 },
      { STV090x_GAINLLR_NF11,       0x21 },
      { STV090x_GAINLLR_NF12,       0x0D },
      { STV090x_GAINLLR_NF13,       0x0F },
      { STV090x_GAINLLR_NF14,       0x13 },
      { STV090x_GAINLLR_NF15,       0x1A },
      { STV090x_GAINLLR_NF16,       0x1F },
      { STV090x_GAINLLR_NF17,       0x21 },
      { STV090x_RCCFGH,       0x20 },
      { STV090x_P1_FECM,            0x01 }, /*disable the DSS mode */
      { STV090x_P1_PRVIT,           0x2f }  /*disable puncture rate 6/7*/
};

static struct stv090x_reg stv0900_cut20_val[] = {

      { STV090x_P2_DMDCFG3,         0xe8 },
      { STV090x_P2_DMDCFG4,         0x10 },
      { STV090x_P2_CARFREQ,         0x38 },
      { STV090x_P2_CARHDR,          0x20 },
      { STV090x_P2_KREFTMG,         0x5a },
      { STV090x_P2_SMAPCOEF7,       0x06 },
      { STV090x_P2_SMAPCOEF6,       0x00 },
      { STV090x_P2_SMAPCOEF5,       0x04 },
      { STV090x_P2_NOSCFG,          0x0c },
      { STV090x_P1_DMDCFG3,         0xe8 },
      { STV090x_P1_DMDCFG4,         0x10 },
      { STV090x_P1_CARFREQ,         0x38 },
      { STV090x_P1_CARHDR,          0x20 },
      { STV090x_P1_KREFTMG,         0x5a },
      { STV090x_P1_SMAPCOEF7,       0x06 },
      { STV090x_P1_SMAPCOEF6,       0x00 },
      { STV090x_P1_SMAPCOEF5,       0x04 },
      { STV090x_P1_NOSCFG,          0x0c },
      { STV090x_GAINLLR_NF4,        0x21 },
      { STV090x_GAINLLR_NF5,        0x21 },
      { STV090x_GAINLLR_NF6,        0x20 },
      { STV090x_GAINLLR_NF7,        0x1F },
      { STV090x_GAINLLR_NF8,        0x1E },
      { STV090x_GAINLLR_NF9,        0x1E },
      { STV090x_GAINLLR_NF10,       0x1D },
      { STV090x_GAINLLR_NF11,       0x1B },
      { STV090x_GAINLLR_NF12,       0x20 },
      { STV090x_GAINLLR_NF13,       0x20 },
      { STV090x_GAINLLR_NF14,       0x20 },
      { STV090x_GAINLLR_NF15,       0x20 },
      { STV090x_GAINLLR_NF16,       0x20 },
      { STV090x_GAINLLR_NF17,       0x21 },
};

static struct stv090x_reg stv0903_cut20_val[] = {
      { STV090x_P1_DMDCFG3,         0xe8 },
      { STV090x_P1_DMDCFG4,         0x10 },
      { STV090x_P1_CARFREQ,         0x38 },
      { STV090x_P1_CARHDR,          0x20 },
      { STV090x_P1_KREFTMG,         0x5a },
      { STV090x_P1_SMAPCOEF7,       0x06 },
      { STV090x_P1_SMAPCOEF6,       0x00 },
      { STV090x_P1_SMAPCOEF5,       0x04 },
      { STV090x_P1_NOSCFG,          0x0c },
      { STV090x_GAINLLR_NF4,        0x21 },
      { STV090x_GAINLLR_NF5,        0x21 },
      { STV090x_GAINLLR_NF6,        0x20 },
      { STV090x_GAINLLR_NF7,        0x1F },
      { STV090x_GAINLLR_NF8,        0x1E },
      { STV090x_GAINLLR_NF9,        0x1E },
      { STV090x_GAINLLR_NF10,       0x1D },
      { STV090x_GAINLLR_NF11,       0x1B },
      { STV090x_GAINLLR_NF12,       0x20 },
      { STV090x_GAINLLR_NF13,       0x20 },
      { STV090x_GAINLLR_NF14,       0x20 },
      { STV090x_GAINLLR_NF15,       0x20 },
      { STV090x_GAINLLR_NF16,       0x20 },
      { STV090x_GAINLLR_NF17,       0x21 }
};

/* Cut 2.0 Long Frame Tracking CR loop */
static struct stv090x_long_frame_crloop stv090x_s2_crl_cut20[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_QPSK_12,  0x1f, 0x3f, 0x1e, 0x3f, 0x3d, 0x1f, 0x3d, 0x3e, 0x3d, 0x1e },
      { STV090x_QPSK_35,  0x2f, 0x3f, 0x2e, 0x2f, 0x3d, 0x0f, 0x0e, 0x2e, 0x3d, 0x0e },
      { STV090x_QPSK_23,  0x2f, 0x3f, 0x2e, 0x2f, 0x0e, 0x0f, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_QPSK_34,  0x3f, 0x3f, 0x3e, 0x1f, 0x0e, 0x3e, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_QPSK_45,  0x3f, 0x3f, 0x3e, 0x1f, 0x0e, 0x3e, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_QPSK_56,  0x3f, 0x3f, 0x3e, 0x1f, 0x0e, 0x3e, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_QPSK_89,  0x3f, 0x3f, 0x3e, 0x1f, 0x1e, 0x3e, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_QPSK_910, 0x3f, 0x3f, 0x3e, 0x1f, 0x1e, 0x3e, 0x0e, 0x1e, 0x3d, 0x3d },
      { STV090x_8PSK_35,  0x3c, 0x3e, 0x1c, 0x2e, 0x0c, 0x1e, 0x2b, 0x2d, 0x1b, 0x1d },
      { STV090x_8PSK_23,  0x1d, 0x3e, 0x3c, 0x2e, 0x2c, 0x1e, 0x0c, 0x2d, 0x2b, 0x1d },
      { STV090x_8PSK_34,  0x0e, 0x3e, 0x3d, 0x2e, 0x0d, 0x1e, 0x2c, 0x2d, 0x0c, 0x1d },
      { STV090x_8PSK_56,  0x2e, 0x3e, 0x1e, 0x2e, 0x2d, 0x1e, 0x3c, 0x2d, 0x2c, 0x1d },
      { STV090x_8PSK_89,  0x3e, 0x3e, 0x1e, 0x2e, 0x3d, 0x1e, 0x0d, 0x2d, 0x3c, 0x1d },
      { STV090x_8PSK_910, 0x3e, 0x3e, 0x1e, 0x2e, 0x3d, 0x1e, 0x1d, 0x2d, 0x0d, 0x1d }
};

/* Cut 3.0 Long Frame Tracking CR loop */
static      struct stv090x_long_frame_crloop stv090x_s2_crl_cut30[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_QPSK_12,  0x3c, 0x2c, 0x0c, 0x2c, 0x1b, 0x2c, 0x1b, 0x1c, 0x0b, 0x3b },
      { STV090x_QPSK_35,  0x0d, 0x0d, 0x0c, 0x0d, 0x1b, 0x3c, 0x1b, 0x1c, 0x0b, 0x3b },
      { STV090x_QPSK_23,  0x1d, 0x0d, 0x0c, 0x1d, 0x2b, 0x3c, 0x1b, 0x1c, 0x0b, 0x3b },
      { STV090x_QPSK_34,  0x1d, 0x1d, 0x0c, 0x1d, 0x2b, 0x3c, 0x1b, 0x1c, 0x0b, 0x3b },
      { STV090x_QPSK_45,  0x2d, 0x1d, 0x1c, 0x1d, 0x2b, 0x3c, 0x2b, 0x0c, 0x1b, 0x3b },
      { STV090x_QPSK_56,  0x2d, 0x1d, 0x1c, 0x1d, 0x2b, 0x3c, 0x2b, 0x0c, 0x1b, 0x3b },
      { STV090x_QPSK_89,  0x3d, 0x2d, 0x1c, 0x1d, 0x3b, 0x3c, 0x2b, 0x0c, 0x1b, 0x3b },
      { STV090x_QPSK_910, 0x3d, 0x2d, 0x1c, 0x1d, 0x3b, 0x3c, 0x2b, 0x0c, 0x1b, 0x3b },
      { STV090x_8PSK_35,  0x39, 0x29, 0x39, 0x19, 0x19, 0x19, 0x19, 0x19, 0x09, 0x19 },
      { STV090x_8PSK_23,  0x2a, 0x39, 0x1a, 0x0a, 0x39, 0x0a, 0x29, 0x39, 0x29, 0x0a },
      { STV090x_8PSK_34,  0x2b, 0x3a, 0x1b, 0x1b, 0x3a, 0x1b, 0x1a, 0x0b, 0x1a, 0x3a },
      { STV090x_8PSK_56,  0x0c, 0x1b, 0x3b, 0x3b, 0x1b, 0x3b, 0x3a, 0x3b, 0x3a, 0x1b },
      { STV090x_8PSK_89,  0x0d, 0x3c, 0x2c, 0x2c, 0x2b, 0x0c, 0x0b, 0x3b, 0x0b, 0x1b },
      { STV090x_8PSK_910, 0x0d, 0x0d, 0x2c, 0x3c, 0x3b, 0x1c, 0x0b, 0x3b, 0x0b, 0x1b }
};

/* Cut 2.0 Long Frame Tracking CR Loop */
static struct stv090x_long_frame_crloop stv090x_s2_apsk_crl_cut20[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_16APSK_23,  0x0c, 0x0c, 0x0c, 0x0c, 0x1d, 0x0c, 0x3c, 0x0c, 0x2c, 0x0c },
      { STV090x_16APSK_34,  0x0c, 0x0c, 0x0c, 0x0c, 0x0e, 0x0c, 0x2d, 0x0c, 0x1d, 0x0c },
      { STV090x_16APSK_45,  0x0c, 0x0c, 0x0c, 0x0c, 0x1e, 0x0c, 0x3d, 0x0c, 0x2d, 0x0c },
      { STV090x_16APSK_56,  0x0c, 0x0c, 0x0c, 0x0c, 0x1e, 0x0c, 0x3d, 0x0c, 0x2d, 0x0c },
      { STV090x_16APSK_89,  0x0c, 0x0c, 0x0c, 0x0c, 0x2e, 0x0c, 0x0e, 0x0c, 0x3d, 0x0c },
      { STV090x_16APSK_910, 0x0c, 0x0c, 0x0c, 0x0c, 0x2e, 0x0c, 0x0e, 0x0c, 0x3d, 0x0c },
      { STV090x_32APSK_34,  0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c },
      { STV090x_32APSK_45,  0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c },
      { STV090x_32APSK_56,  0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c },
      { STV090x_32APSK_89,  0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c },
      { STV090x_32APSK_910, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c }
};

/* Cut 3.0 Long Frame Tracking CR Loop */
static struct stv090x_long_frame_crloop   stv090x_s2_apsk_crl_cut30[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_16APSK_23,  0x0a, 0x0a, 0x0a, 0x0a, 0x1a, 0x0a, 0x3a, 0x0a, 0x2a, 0x0a },
      { STV090x_16APSK_34,  0x0a, 0x0a, 0x0a, 0x0a, 0x0b, 0x0a, 0x3b, 0x0a, 0x1b, 0x0a },
      { STV090x_16APSK_45,  0x0a, 0x0a, 0x0a, 0x0a, 0x1b, 0x0a, 0x3b, 0x0a, 0x2b, 0x0a },
      { STV090x_16APSK_56,  0x0a, 0x0a, 0x0a, 0x0a, 0x1b, 0x0a, 0x3b, 0x0a, 0x2b, 0x0a },
      { STV090x_16APSK_89,  0x0a, 0x0a, 0x0a, 0x0a, 0x2b, 0x0a, 0x0c, 0x0a, 0x3b, 0x0a },
      { STV090x_16APSK_910, 0x0a, 0x0a, 0x0a, 0x0a, 0x2b, 0x0a, 0x0c, 0x0a, 0x3b, 0x0a },
      { STV090x_32APSK_34,  0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a },
      { STV090x_32APSK_45,  0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a },
      { STV090x_32APSK_56,  0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a },
      { STV090x_32APSK_89,  0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a },
      { STV090x_32APSK_910, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a }
};

static struct stv090x_long_frame_crloop stv090x_s2_lowqpsk_crl_cut20[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_QPSK_14,  0x0f, 0x3f, 0x0e, 0x3f, 0x2d, 0x2f, 0x2d, 0x1f, 0x3d, 0x3e },
      { STV090x_QPSK_13,  0x0f, 0x3f, 0x0e, 0x3f, 0x2d, 0x2f, 0x3d, 0x0f, 0x3d, 0x2e },
      { STV090x_QPSK_25,  0x1f, 0x3f, 0x1e, 0x3f, 0x3d, 0x1f, 0x3d, 0x3e, 0x3d, 0x2e }
};

static struct stv090x_long_frame_crloop   stv090x_s2_lowqpsk_crl_cut30[] = {
      /* MODCOD  2MPon 2MPoff 5MPon 5MPoff 10MPon 10MPoff 20MPon 20MPoff 30MPon 30MPoff */
      { STV090x_QPSK_14,  0x0c, 0x3c, 0x0b, 0x3c, 0x2a, 0x2c, 0x2a, 0x1c, 0x3a, 0x3b },
      { STV090x_QPSK_13,  0x0c, 0x3c, 0x0b, 0x3c, 0x2a, 0x2c, 0x3a, 0x0c, 0x3a, 0x2b },
      { STV090x_QPSK_25,  0x1c, 0x3c, 0x1b, 0x3c, 0x3a, 0x1c, 0x3a, 0x3b, 0x3a, 0x2b }
};

/* Cut 2.0 Short Frame Tracking CR Loop */
static struct stv090x_short_frame_crloop stv090x_s2_short_crl_cut20[] = {
      /* MODCOD     2M    5M    10M   20M   30M */
      { STV090x_QPSK,   0x2f, 0x2e, 0x0e, 0x0e, 0x3d },
      { STV090x_8PSK,   0x3e, 0x0e, 0x2d, 0x0d, 0x3c },
      { STV090x_16APSK, 0x1e, 0x1e, 0x1e, 0x3d, 0x2d },
      { STV090x_32APSK, 0x1e, 0x1e, 0x1e, 0x3d, 0x2d }
};

/* Cut 3.0 Short Frame Tracking CR Loop */
static struct stv090x_short_frame_crloop stv090x_s2_short_crl_cut30[] = {
      /* MODCOD     2M  5M    10M   20M     30M */
      { STV090x_QPSK,   0x2C, 0x2B, 0x0B, 0x0B, 0x3A },
      { STV090x_8PSK,   0x3B, 0x0B, 0x2A, 0x0A, 0x39 },
      { STV090x_16APSK, 0x1B, 0x1B, 0x1B, 0x3A, 0x2A },
      { STV090x_32APSK, 0x1B, 0x1B, 0x1B, 0x3A, 0x2A }
};

static inline s32 comp2(s32 __x, s32 __width)
{
      if (__width == 32)
            return __x;
      else
            return (__x >= (1 << (__width - 1))) ? (__x - (1 << __width)) : __x;
}

static int stv090x_read_reg(struct stv090x_state *state, unsigned int reg)
{
      const struct stv090x_config *config = state->config;
      int ret;

      u8 b0[] = { reg >> 8, reg & 0xff };
      u8 buf;

      struct i2c_msg msg[] = {
            { .addr     = config->address, .flags     = 0,        .buf = b0,   .len = 2 },
            { .addr     = config->address, .flags     = I2C_M_RD, .buf = &buf, .len = 1 }
      };

      ret = i2c_transfer(state->i2c, msg, 2);
      if (ret != 2) {
            if (ret != -ERESTARTSYS)
                  dprintk(FE_ERROR, 1,
                        "Read error, Reg=[0x%02x], Status=%d",
                        reg, ret);

            return ret < 0 ? ret : -EREMOTEIO;
      }
      if (unlikely(*state->verbose >= FE_DEBUGREG))
            dprintk(FE_ERROR, 1, "Reg=[0x%02x], data=%02x",
                  reg, buf);

      return (unsigned int) buf;
}

static int stv090x_write_regs(struct stv090x_state *state, unsigned int reg, u8 *data, u32 count)
{
      const struct stv090x_config *config = state->config;
      int ret;
      u8 buf[2 + count];
      struct i2c_msg i2c_msg = { .addr = config->address, .flags = 0, .buf = buf, .len = 2 + count };

      buf[0] = reg >> 8;
      buf[1] = reg & 0xff;
      memcpy(&buf[2], data, count);

      if (unlikely(*state->verbose >= FE_DEBUGREG)) {
            int i;

            printk(KERN_DEBUG "%s [0x%04x]:", __func__, reg);
            for (i = 0; i < count; i++)
                  printk(" %02x", data[i]);
            printk("\n");
      }

      ret = i2c_transfer(state->i2c, &i2c_msg, 1);
      if (ret != 1) {
            if (ret != -ERESTARTSYS)
                  dprintk(FE_ERROR, 1, "Reg=[0x%04x], Data=[0x%02x ...], Count=%u, Status=%d",
                        reg, data[0], count, ret);
            return ret < 0 ? ret : -EREMOTEIO;
      }

      return 0;
}

static int stv090x_write_reg(struct stv090x_state *state, unsigned int reg, u8 data)
{
      return stv090x_write_regs(state, reg, &data, 1);
}

static int stv090x_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;

      reg = STV090x_READ_DEMOD(state, I2CRPT);
      if (enable) {
            dprintk(FE_DEBUG, 1, "Enable Gate");
            STV090x_SETFIELD_Px(reg, I2CT_ON_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, I2CRPT, reg) < 0)
                  goto err;

      } else {
            dprintk(FE_DEBUG, 1, "Disable Gate");
            STV090x_SETFIELD_Px(reg, I2CT_ON_FIELD, 0);
            if ((STV090x_WRITE_DEMOD(state, I2CRPT, reg)) < 0)
                  goto err;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static void stv090x_get_lock_tmg(struct stv090x_state *state)
{
      switch (state->algo) {
      case STV090x_BLIND_SEARCH:
            dprintk(FE_DEBUG, 1, "Blind Search");
            if (state->srate <= 1500000) {  /*10Msps< SR <=15Msps*/
                  state->DemodTimeout = 1500;
                  state->FecTimeout = 400;
            } else if (state->srate <= 5000000) {  /*10Msps< SR <=15Msps*/
                  state->DemodTimeout = 1000;
                  state->FecTimeout = 300;
            } else {  /*SR >20Msps*/
                  state->DemodTimeout = 700;
                  state->FecTimeout = 100;
            }
            break;

      case STV090x_COLD_SEARCH:
      case STV090x_WARM_SEARCH:
      default:
            dprintk(FE_DEBUG, 1, "Normal Search");
            if (state->srate <= 1000000) {  /*SR <=1Msps*/
                  state->DemodTimeout = 4500;
                  state->FecTimeout = 1700;
            } else if (state->srate <= 2000000) { /*1Msps < SR <= 2Msps */
                  state->DemodTimeout = 2500;
                  state->FecTimeout = 1100;
            } else if (state->srate <= 5000000) { /*2Msps < SR <= 5Msps */
                  state->DemodTimeout = 1000;
                  state->FecTimeout = 550;
            } else if (state->srate <= 10000000) { /*5Msps < SR <= 10Msps */
                  state->DemodTimeout = 700;
                  state->FecTimeout = 250;
            } else if (state->srate <= 20000000) { /*10Msps < SR <= 20Msps */
                  state->DemodTimeout = 400;
                  state->FecTimeout = 130;
            } else {   /*SR >20Msps*/
                  state->DemodTimeout = 300;
                  state->FecTimeout = 100;
            }
            break;
      }

      if (state->algo == STV090x_WARM_SEARCH)
            state->DemodTimeout /= 2;
}

static int stv090x_set_srate(struct stv090x_state *state, u32 srate)
{
      u32 sym;

      if (srate > 60000000) {
            sym  = (srate << 4); /* SR * 2^16 / master_clk */
            sym /= (state->mclk >> 12);
      } else if (srate > 6000000) {
            sym  = (srate << 6);
            sym /= (state->mclk >> 10);
      } else {
            sym  = (srate << 9);
            sym /= (state->mclk >> 7);
      }

      if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0x7f) < 0) /* MSB */
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRINIT0, (sym & 0xff)) < 0) /* LSB */
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_set_max_srate(struct stv090x_state *state, u32 clk, u32 srate)
{
      u32 sym;

      srate = 105 * (srate / 100);
      if (srate > 60000000) {
            sym  = (srate << 4); /* SR * 2^16 / master_clk */
            sym /= (state->mclk >> 12);
      } else if (srate > 6000000) {
            sym  = (srate << 6);
            sym /= (state->mclk >> 10);
      } else {
            sym  = (srate << 9);
            sym /= (state->mclk >> 7);
      }

      if (sym < 0x7fff) {
            if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0) /* MSB */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0) /* LSB */
                  goto err;
      } else {
            if (STV090x_WRITE_DEMOD(state, SFRUP1, 0x7f) < 0) /* MSB */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, SFRUP0, 0xff) < 0) /* LSB */
                  goto err;
      }

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_set_min_srate(struct stv090x_state *state, u32 clk, u32 srate)
{
      u32 sym;

      srate = 95 * (srate / 100);
      if (srate > 60000000) {
            sym  = (srate << 4); /* SR * 2^16 / master_clk */
            sym /= (state->mclk >> 12);
      } else if (srate > 6000000) {
            sym  = (srate << 6);
            sym /= (state->mclk >> 10);
      } else {
            sym  = (srate << 9);
            sym /= (state->mclk >> 7);
      }

      if (STV090x_WRITE_DEMOD(state, SFRLOW1, ((sym >> 8) & 0xff)) < 0) /* MSB */
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRLOW0, (sym & 0xff)) < 0) /* LSB */
            goto err;
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static u32 stv090x_car_width(u32 srate, enum stv090x_rolloff rolloff)
{
      u32 ro;

      switch (rolloff) {
      case STV090x_RO_20:
            ro = 20;
            break;
      case STV090x_RO_25:
            ro = 25;
            break;
      case STV090x_RO_35:
      default:
            ro = 35;
            break;
      }

      return srate + (srate * ro) / 100;
}

static int stv090x_set_vit_thacq(struct stv090x_state *state)
{
      if (STV090x_WRITE_DEMOD(state, VTH12, 0x96) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH23, 0x64) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH34, 0x36) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH56, 0x23) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH67, 0x1e) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH78, 0x19) < 0)
            goto err;
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_set_vit_thtracq(struct stv090x_state *state)
{
      if (STV090x_WRITE_DEMOD(state, VTH12, 0xd0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH23, 0x7d) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH34, 0x53) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH56, 0x2f) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH67, 0x24) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, VTH78, 0x1f) < 0)
            goto err;
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_set_viterbi(struct stv090x_state *state)
{
      switch (state->search_mode) {
      case STV090x_SEARCH_AUTO:
            if (STV090x_WRITE_DEMOD(state, FECM, 0x10) < 0) /* DVB-S and DVB-S2 */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, PRVIT, 0x3f) < 0) /* all puncture rate */
                  goto err;
            break;
      case STV090x_SEARCH_DVBS1:
            if (STV090x_WRITE_DEMOD(state, FECM, 0x00) < 0) /* disable DSS */
                  goto err;
            switch (state->fec) {
            case STV090x_PR12:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x01) < 0)
                        goto err;
                  break;

            case STV090x_PR23:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x02) < 0)
                        goto err;
                  break;

            case STV090x_PR34:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x04) < 0)
                        goto err;
                  break;

            case STV090x_PR56:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x08) < 0)
                        goto err;
                  break;

            case STV090x_PR78:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x20) < 0)
                        goto err;
                  break;

            default:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x2f) < 0) /* all */
                        goto err;
                  break;
            }
            break;
      case STV090x_SEARCH_DSS:
            if (STV090x_WRITE_DEMOD(state, FECM, 0x80) < 0)
                  goto err;
            switch (state->fec) {
            case STV090x_PR12:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x01) < 0)
                        goto err;
                  break;

            case STV090x_PR23:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x02) < 0)
                        goto err;
                  break;

            case STV090x_PR67:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x10) < 0)
                        goto err;
                  break;

            default:
                  if (STV090x_WRITE_DEMOD(state, PRVIT, 0x13) < 0) /* 1/2, 2/3, 6/7 */
                        goto err;
                  break;
            }
            break;
      default:
            break;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_stop_modcod(struct stv090x_state *state)
{
      if (STV090x_WRITE_DEMOD(state, MODCODLST0, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST1, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST2, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST3, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST4, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST5, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST6, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST7, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST8, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST9, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTA, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTB, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTC, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTD, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTE, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTF, 0xff) < 0)
            goto err;
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_activate_modcod(struct stv090x_state *state)
{
      if (STV090x_WRITE_DEMOD(state, MODCODLST0, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST1, 0xfc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST2, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST3, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST4, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST5, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST6, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST7, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST8, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST9, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTA, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTB, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTC, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTD, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTE, 0xcc) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTF, 0xcf) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_activate_modcod_single(struct stv090x_state *state)
{

      if (STV090x_WRITE_DEMOD(state, MODCODLST0, 0xff) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST1, 0xf0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST2, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST3, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST4, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST5, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST6, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST7, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST8, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLST9, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTA, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTB, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTC, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTD, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTE, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, MODCODLSTF, 0x0f) < 0)
            goto err;

      return 0;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_vitclk_ctl(struct stv090x_state *state, int enable)
{
      u32 reg;

      switch (state->demod) {
      case STV090x_DEMODULATOR_0:
            mutex_lock(&demod_lock);
            reg = stv090x_read_reg(state, STV090x_STOPCLK2);
            STV090x_SETFIELD(reg, STOP_CLKVIT1_FIELD, enable);
            if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
                  goto err;
            mutex_unlock(&demod_lock);
            break;

      case STV090x_DEMODULATOR_1:
            mutex_lock(&demod_lock);
            reg = stv090x_read_reg(state, STV090x_STOPCLK2);
            STV090x_SETFIELD(reg, STOP_CLKVIT2_FIELD, enable);
            if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
                  goto err;
            mutex_unlock(&demod_lock);
            break;

      default:
            dprintk(FE_ERROR, 1, "Wrong demodulator!");
            break;
      }
      return 0;
err:
      mutex_unlock(&demod_lock);
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_dvbs_track_crl(struct stv090x_state *state)
{
      if (state->dev_ver >= 0x30) {
            /* Set ACLC BCLC optimised value vs SR */
            if (state->srate >= 15000000) {
                  if (STV090x_WRITE_DEMOD(state, ACLC, 0x2b) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, BCLC, 0x1a) < 0)
                        goto err;
            } else if ((state->srate >= 7000000) && (15000000 > state->srate)) {
                  if (STV090x_WRITE_DEMOD(state, ACLC, 0x0c) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, BCLC, 0x1b) < 0)
                        goto err;
            } else if (state->srate < 7000000) {
                  if (STV090x_WRITE_DEMOD(state, ACLC, 0x2c) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, BCLC, 0x1c) < 0)
                        goto err;
            }

      } else {
            /* Cut 2.0 */
            if (STV090x_WRITE_DEMOD(state, ACLC, 0x1a) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, BCLC, 0x09) < 0)
                  goto err;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_delivery_search(struct stv090x_state *state)
{
      u32 reg;

      switch (state->search_mode) {
      case STV090x_SEARCH_DVBS1:
      case STV090x_SEARCH_DSS:
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 0);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;

            /* Activate Viterbi decoder in legacy search,
             * do not use FRESVIT1, might impact VITERBI2
             */
            if (stv090x_vitclk_ctl(state, 0) < 0)
                  goto err;

            if (stv090x_dvbs_track_crl(state) < 0)
                  goto err;

            if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x22) < 0) /* disable DVB-S2 */
                  goto err;

            if (stv090x_set_vit_thacq(state) < 0)
                  goto err;
            if (stv090x_set_viterbi(state) < 0)
                  goto err;
            break;

      case STV090x_SEARCH_DVBS2:
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 0);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 0);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;

            if (stv090x_vitclk_ctl(state, 1) < 0)
                  goto err;

            if (STV090x_WRITE_DEMOD(state, ACLC, 0x1a) < 0) /* stop DVB-S CR loop */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, BCLC, 0x09) < 0)
                  goto err;

            if (state->dev_ver <= 0x20) {
                  /* enable S2 carrier loop */
                  if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x26) < 0)
                        goto err;
            } else {
                  /* > Cut 3: Stop carrier 3 */
                  if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x66) < 0)
                        goto err;
            }

            if (state->demod_mode != STV090x_SINGLE) {
                  /* Cut 2: enable link during search */
                  if (stv090x_activate_modcod(state) < 0)
                        goto err;
            } else {
                  /* Single demodulator
                   * Authorize SHORT and LONG frames,
                   * QPSK, 8PSK, 16APSK and 32APSK
                   */
                  if (stv090x_activate_modcod_single(state) < 0)
                        goto err;
            }

            break;

      case STV090x_SEARCH_AUTO:
      default:
            /* enable DVB-S2 and DVB-S2 in Auto MODE */
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;

            if (stv090x_vitclk_ctl(state, 0) < 0)
                  goto err;

            if (stv090x_dvbs_track_crl(state) < 0)
                  goto err;

            if (state->dev_ver <= 0x20) {
                  /* enable S2 carrier loop */
                  if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x26) < 0)
                        goto err;
            } else {
                  /* > Cut 3: Stop carrier 3 */
                  if (STV090x_WRITE_DEMOD(state, CAR2CFG, 0x66) < 0)
                        goto err;
            }

            if (state->demod_mode != STV090x_SINGLE) {
                  /* Cut 2: enable link during search */
                  if (stv090x_activate_modcod(state) < 0)
                        goto err;
            } else {
                  /* Single demodulator
                   * Authorize SHORT and LONG frames,
                   * QPSK, 8PSK, 16APSK and 32APSK
                   */
                  if (stv090x_activate_modcod_single(state) < 0)
                        goto err;
            }

            if (state->srate >= 2000000) {
                  /* Srate >= 2MSPS, Viterbi threshold to acquire */
                  if (stv090x_set_vit_thacq(state) < 0)
                        goto err;
            } else {
                  /* Srate < 2MSPS, Reset Viterbi thresholdto track
                   * and then re-acquire
                   */
                  if (stv090x_set_vit_thtracq(state) < 0)
                        goto err;
            }

            if (stv090x_set_viterbi(state) < 0)
                  goto err;
            break;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_start_search(struct stv090x_state *state)
{
      u32 reg, freq_abs;
      s16 freq;

      /* Reset demodulator */
      reg = STV090x_READ_DEMOD(state, DMDISTATE);
      STV090x_SETFIELD_Px(reg, I2C_DEMOD_MODE_FIELD, 0x1f);
      if (STV090x_WRITE_DEMOD(state, DMDISTATE, reg) < 0)
            goto err;

      if (state->dev_ver <= 0x20) {
            if (state->srate <= 5000000) {
                  if (STV090x_WRITE_DEMOD(state, CARCFG, 0x44) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRUP1, 0x0f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRUP1, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRLOW1, 0xf0) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRLOW0, 0x00) < 0)
                        goto err;

                  /*enlarge the timing bandwith for Low SR*/
                  if (STV090x_WRITE_DEMOD(state, RTCS2, 0x68) < 0)
                        goto err;
            } else {
                  /* If the symbol rate is >5 Msps
                  Set The carrier search up and low to auto mode */
                  if (STV090x_WRITE_DEMOD(state, CARCFG, 0xc4) < 0)
                        goto err;
                  /*reduce the timing bandwith for high SR*/
                  if (STV090x_WRITE_DEMOD(state, RTCS2, 0x44) < 0)
                        goto err;
            }
      } else {
            /* >= Cut 3 */
            if (state->srate <= 5000000) {
                  /* enlarge the timing bandwith for Low SR */
                  STV090x_WRITE_DEMOD(state, RTCS2, 0x68);
            } else {
                  /* reduce timing bandwith for high SR */
                  STV090x_WRITE_DEMOD(state, RTCS2, 0x44);
            }

            /* Set CFR min and max to manual mode */
            STV090x_WRITE_DEMOD(state, CARCFG, 0x46);

            if (state->algo == STV090x_WARM_SEARCH) {
                  /* WARM Start
                   * CFR min = -1MHz,
                   * CFR max = +1MHz
                   */
                  freq_abs  = 1000 << 16;
                  freq_abs /= (state->mclk / 1000);
                  freq      = (s16) freq_abs;
            } else {
                  /* COLD Start
                   * CFR min =- (SearchRange / 2 + 600KHz)
                   * CFR max = +(SearchRange / 2 + 600KHz)
                   * (600KHz for the tuner step size)
                   */
                  freq_abs  = (state->search_range / 2000) + 600;
                  freq_abs  = freq_abs << 16;
                  freq_abs /= (state->mclk / 1000);
                  freq      = (s16) freq_abs;
            }

            if (STV090x_WRITE_DEMOD(state, CFRUP1, MSB(freq)) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRUP1, LSB(freq)) < 0)
                  goto err;

            freq *= -1;

            if (STV090x_WRITE_DEMOD(state, CFRLOW1, MSB(freq)) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRLOW0, LSB(freq)) < 0)
                  goto err;

      }

      if (STV090x_WRITE_DEMOD(state, CFRINIT1, 0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, CFRINIT0, 0) < 0)
            goto err;

      if (state->dev_ver >= 0x20) {
            if (STV090x_WRITE_DEMOD(state, EQUALCFG, 0x41) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, FFECFG, 0x41) < 0)
                  goto err;

            if ((state->search_mode == STV090x_DVBS1) ||
                  (state->search_mode == STV090x_DSS) ||
                  (state->search_mode == STV090x_SEARCH_AUTO)) {

                  if (STV090x_WRITE_DEMOD(state, VITSCALE, 0x82) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, VAVSRVIT, 0x00) < 0)
                        goto err;
            }
      }

      if (STV090x_WRITE_DEMOD(state, SFRSTEP, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHRISE, 0xe0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHFALL, 0xc0) < 0)
            goto err;

      reg = STV090x_READ_DEMOD(state, DMDCFGMD);
      STV090x_SETFIELD_Px(reg, SCAN_ENABLE_FIELD, 0);
      STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
            goto err;
      reg = STV090x_READ_DEMOD(state, DMDCFG2);
      STV090x_SETFIELD_Px(reg, S1S2_SEQUENTIAL_FIELD, 0x0);
      if (STV090x_WRITE_DEMOD(state, DMDCFG2, reg) < 0)
            goto err;

      if (state->dev_ver >= 0x20) {
            /*Frequency offset detector setting*/
            if (state->srate < 2000000) {
                  if (state->dev_ver <= 0x20) {
                        /* Cut 2 */
                        if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x39) < 0)
                              goto err;
                  } else {
                        /* Cut 2 */
                        if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x89) < 0)
                              goto err;
                  }
                  if (STV090x_WRITE_DEMOD(state, CARHDR, 0x40) < 0)
                        goto err;
            }

            if (state->srate < 10000000) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x4c) < 0)
                        goto err;
            } else {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x4b) < 0)
                        goto err;
            }
      } else {
            if (state->srate < 10000000) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0xef) < 0)
                        goto err;
            } else {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0xed) < 0)
                        goto err;
            }
      }

      switch (state->algo) {
      case STV090x_WARM_SEARCH:
            /* The symbol rate and the exact
             * carrier Frequency are known
             */
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x18) < 0)
                  goto err;
            break;

      case STV090x_COLD_SEARCH:
            /* The symbol rate is known */
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x15) < 0)
                  goto err;
            break;

      default:
            break;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_get_agc2_min_level(struct stv090x_state *state)
{
      u32 agc2_min = 0, agc2 = 0, freq_init, freq_step, reg;
      s32 i, j, steps, dir;

      if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
            goto err;
      reg = STV090x_READ_DEMOD(state, DMDCFGMD);
      STV090x_SETFIELD_Px(reg, SCAN_ENABLE_FIELD, 1);
      STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, SFRUP1, 0x83) < 0) /* SR = 65 Msps Max */
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRUP0, 0xc0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRLOW1, 0x82) < 0) /* SR= 400 ksps Min */
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRLOW0, 0xa0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, DMDTOM, 0x00) < 0) /* stop acq @ coarse carrier state */
            goto err;
      if (stv090x_set_srate(state, 1000000) < 0)
            goto err;

      steps  = -1 + state->search_range / 1000000;
      steps /= 2;
      steps  = (2 * steps) + 1;
      if (steps < 0)
            steps = 1;

      dir = 1;
      freq_step = (1000000 * 256) / (state->mclk / 256);
      freq_init = 0;

      for (i = 0; i < steps; i++) {
            if (dir > 0)
                  freq_init = freq_init + (freq_step * i);
            else
                  freq_init = freq_init - (freq_step * i);

            dir = -1;

            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5c) < 0) /* Demod RESET */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT1, (freq_init >> 8) & 0xff) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT0, freq_init & 0xff) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x58) < 0) /* Demod RESET */
                  goto err;
            msleep(10);
            for (j = 0; j < 10; j++) {
                  agc2 += STV090x_READ_DEMOD(state, AGC2I1) << 8;
                  agc2 |= STV090x_READ_DEMOD(state, AGC2I0);
            }
            agc2 /= 10;
            agc2_min = 0xffff;
            if (agc2 < 0xffff)
                  agc2_min = agc2;
      }

      return agc2_min;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static u32 stv090x_get_srate(struct stv090x_state *state, u32 clk)
{
      u8 r3, r2, r1, r0;
      s32 srate, int_1, int_2, tmp_1, tmp_2;

      r3 = STV090x_READ_DEMOD(state, SFR3);
      r2 = STV090x_READ_DEMOD(state, SFR2);
      r1 = STV090x_READ_DEMOD(state, SFR1);
      r0 = STV090x_READ_DEMOD(state, SFR0);

      srate = ((r3 << 24) | (r2 << 16) | (r1 <<  8) | r0);

      int_1 = clk >> 16;
      int_2 = srate >> 16;

      tmp_1 = clk % 0x10000;
      tmp_2 = srate % 0x10000;

      srate = (int_1 * int_2) +
            ((int_1 * tmp_2) >> 16) +
            ((int_2 * tmp_1) >> 16);

      return srate;
}

static u32 stv090x_srate_srch_coarse(struct stv090x_state *state)
{
      struct dvb_frontend *fe = &state->frontend;

      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;

      reg = STV090x_READ_DEMOD(state, DMDISTATE);
      STV090x_SETFIELD_Px(reg, I2C_DEMOD_MODE_FIELD, 0x1f); /* Demod RESET */
      if (STV090x_WRITE_DEMOD(state, DMDISTATE, reg) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGCFG, 0x12) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHRISE, 0xf0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHFALL, 0xe0) < 0)
            goto err;
      reg = STV090x_READ_DEMOD(state, DMDCFGMD);
      STV090x_SETFIELD_Px(reg, SCAN_ENABLE_FIELD, 1);
      STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, SFRUP1, 0x83) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRUP0, 0xc0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRLOW1, 0x82) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, SFRLOW0, 0xa0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, DMDTOM, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x60) < 0)
            goto err;

      if (state->dev_ver >= 0x30) {
            if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x99) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, SFRSTEP, 0x95) < 0)
                  goto err;

      } else if (state->dev_ver >= 0x20) {
            if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x6a) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, SFRSTEP, 0x95) < 0)
                  goto err;
      }

      if (state->srate <= 2000000)
            car_step = 1000;
      else if (state->srate <= 5000000)
            car_step = 2000;
      else if (state->srate <= 12000000)
            car_step = 3000;
      else
            car_step = 5000;

      steps  = -1 + ((state->search_range / 1000) / car_step);
      steps /= 2;
      steps  = (2 * steps) + 1;
      if (steps < 0)
            steps = 1;
      else if (steps > 10) {
            steps = 11;
            car_step = (state->search_range / 1000) / 10;
      }
      cur_step = 0;
      dir = 1;
      freq = state->frequency;

      while ((!tmg_lock) && (cur_step < steps)) {
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5f) < 0) /* Demod RESET */
                  goto err;
            reg = STV090x_READ_DEMOD(state, DMDISTATE);
            STV090x_SETFIELD_Px(reg, I2C_DEMOD_MODE_FIELD, 0x00); /* trigger acquisition */
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, reg) < 0)
                  goto err;
            msleep(50);
            for (i = 0; i < 10; i++) {
                  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 /= 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))
                  tmg_lock = 1;
            else if (cur_step < steps) {
                  if (dir > 0)
                        freq += cur_step * car_step;
                  else
                        freq -= cur_step * car_step;

                  /* Setup tuner */
                  if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                        goto err;

                  if (state->config->tuner_set_frequency) {
                        if (state->config->tuner_set_frequency(fe, state->frequency) < 0)
                              goto err;
                  }

                  if (state->config->tuner_set_bandwidth) {
                        if (state->config->tuner_set_bandwidth(fe, state->tuner_bw) < 0)
                              goto err;
                  }

                  if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                        goto err;

                  msleep(50);

                  if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                        goto err;

                  if (state->config->tuner_get_status) {
                        if (state->config->tuner_get_status(fe, &reg) < 0)
                              goto err;
                  }

                  if (reg)
                        dprintk(FE_DEBUG, 1, "Tuner phase locked");
                  else
                        dprintk(FE_DEBUG, 1, "Tuner unlocked");

                  if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                        goto err;

            }
      }
      if (!tmg_lock)
            srate_coarse = 0;
      else
            srate_coarse = stv090x_get_srate(state, state->mclk);

      return srate_coarse;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static u32 stv090x_srate_srch_fine(struct stv090x_state *state)
{
      u32 srate_coarse, freq_coarse, sym, reg;

      srate_coarse = stv090x_get_srate(state, state->mclk);
      freq_coarse  = STV090x_READ_DEMOD(state, CFR2) << 8;
      freq_coarse |= STV090x_READ_DEMOD(state, CFR1);
      sym = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */

      if (sym < state->srate)
            srate_coarse = 0;
      else {
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0) /* Demod RESET */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGCFG2, 0x01) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGTHRISE, 0x20) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGTHFALL, 0x00) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGCFG, 0xd2) < 0)
                  goto err;
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 0x00);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;

            if (state->dev_ver >= 0x30) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x79) < 0)
                        goto err;
            } else if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
                        goto err;
            }

            if (srate_coarse > 3000000) {
                  sym  = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */
                  sym  = (sym / 1000) * 65536;
                  sym /= (state->mclk / 1000);
                  if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0)
                        goto err;
                  sym  = 10 * (srate_coarse / 13); /* SFRLOW = SFR - 30% */
                  sym  = (sym / 1000) * 65536;
                  sym /= (state->mclk / 1000);
                  if (STV090x_WRITE_DEMOD(state, SFRLOW1, (sym >> 8) & 0x7f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRLOW0, sym & 0xff) < 0)
                        goto err;
                  sym  = (srate_coarse / 1000) * 65536;
                  sym /= (state->mclk / 1000);
                  if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRINIT0, sym & 0xff) < 0)
                        goto err;
            } else {
                  sym  = 13 * (srate_coarse / 10); /* SFRUP = SFR + 30% */
                  sym  = (sym / 100) * 65536;
                  sym /= (state->mclk / 100);
                  if (STV090x_WRITE_DEMOD(state, SFRUP1, (sym >> 8) & 0x7f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRUP0, sym & 0xff) < 0)
                        goto err;
                  sym  = 10 * (srate_coarse / 14); /* SFRLOW = SFR - 30% */
                  sym  = (sym / 100) * 65536;
                  sym /= (state->mclk / 100);
                  if (STV090x_WRITE_DEMOD(state, SFRLOW1, (sym >> 8) & 0x7f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRLOW0, sym & 0xff) < 0)
                        goto err;
                  sym  = (srate_coarse / 100) * 65536;
                  sym /= (state->mclk / 100);
                  if (STV090x_WRITE_DEMOD(state, SFRINIT1, (sym >> 8) & 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, SFRINIT0, sym & 0xff) < 0)
                        goto err;
            }
            if (STV090x_WRITE_DEMOD(state, DMDTOM, 0x20) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT1, (freq_coarse >> 8) & 0xff) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT0, freq_coarse & 0xff) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x15) < 0) /* trigger acquisition */
                  goto err;
      }

      return srate_coarse;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_get_dmdlock(struct stv090x_state *state, s32 timeout)
{
      s32 timer = 0, lock = 0;
      u32 reg;
      u8 stat;

      while ((timer < timeout) && (!lock)) {
            reg = STV090x_READ_DEMOD(state, DMDSTATE);
            stat = STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD);

            switch (stat) {
            case 0: /* searching */
            case 1: /* first PLH detected */
            default:
                  dprintk(FE_DEBUG, 1, "Demodulator searching ..");
                  lock = 0;
                  break;
            case 2: /* DVB-S2 mode */
            case 3: /* DVB-S1/legacy mode */
                  reg = STV090x_READ_DEMOD(state, DSTATUS);
                  lock = STV090x_GETFIELD_Px(reg, LOCK_DEFINITIF_FIELD);
                  break;
            }

            if (!lock)
                  msleep(10);
            else
                  dprintk(FE_DEBUG, 1, "Demodulator acquired LOCK");

            timer += 10;
      }
      return lock;
}

static int stv090x_blind_search(struct stv090x_state *state)
{
      u32 agc2, reg, srate_coarse;
      s32 timeout_dmd = 500, cpt_fail, agc2_ovflw, i;
      u8 k_ref, k_max, k_min;
      int coarse_fail, lock;

      k_max = 120;
      k_min = 30;

      agc2 = stv090x_get_agc2_min_level(state);

      if (agc2 > STV090x_SEARCH_AGC2_TH(state->dev_ver)) {
            lock = 0;
      } else {

            if (state->dev_ver <= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, CARCFG, 0xc4) < 0)
                        goto err;
            } else {
                  /* > Cut 3 */
                  if (STV090x_WRITE_DEMOD(state, CARCFG, 0x06) < 0)
                        goto err;
            }

            if (STV090x_WRITE_DEMOD(state, RTCS2, 0x44) < 0)
                  goto err;

            if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, EQUALCFG, 0x41) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, FFECFG, 0x41) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, VITSCALE, 0x82) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, VAVSRVIT, 0x00) < 0) /* set viterbi hysteresis */
                        goto err;
            }

            k_ref = k_max;
            do {
                  if (STV090x_WRITE_DEMOD(state, KREFTMG, k_ref) < 0)
                        goto err;
                  if (stv090x_srate_srch_coarse(state) != 0) {
                        srate_coarse = stv090x_srate_srch_fine(state);
                        if (srate_coarse != 0) {
                              stv090x_get_lock_tmg(state);
                              lock = stv090x_get_dmdlock(state, timeout_dmd);
                        } else {
                              lock = 0;
                        }
                  } else {
                        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);
                              if (agc2 >= 0xff00)
                                    agc2_ovflw++;
                              reg = STV090x_READ_DEMOD(state, DSTATUS2);
                              if ((STV090x_GETFIELD_Px(reg, CFR_OVERFLOW_FIELD) == 0x01) &&
                                  (STV090x_GETFIELD_Px(reg, DEMOD_DELOCK_FIELD) == 0x01))

                                    cpt_fail++;
                        }
                        if ((cpt_fail > 7) || (agc2_ovflw > 7))
                              coarse_fail = 1;

                        lock = 0;
                  }
                  k_ref -= 30;
            } while ((k_ref >= k_min) && (!lock) && (!coarse_fail));
      }

      return lock;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_chk_tmg(struct stv090x_state *state)
{
      u32 reg;
      s32 tmg_cpt = 0, i;
      u8 freq, tmg_thh, tmg_thl;
      int tmg_lock;

      freq = STV090x_READ_DEMOD(state, CARFREQ);
      tmg_thh = STV090x_READ_DEMOD(state, TMGTHRISE);
      tmg_thl = STV090x_READ_DEMOD(state, TMGTHFALL);
      if (STV090x_WRITE_DEMOD(state, TMGTHRISE, 0x20) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHFALL, 0x00) < 0)
            goto err;

      reg = STV090x_READ_DEMOD(state, DMDCFGMD);
      STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 0x00); /* stop carrier offset search */
      if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, RTC, 0x80) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, RTCS2, 0x40) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x00) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, CFRINIT1, 0x00) < 0) /* set car ofset to 0 */
            goto err;
      if (STV090x_WRITE_DEMOD(state, CFRINIT0, 0x00) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x65) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x18) < 0) /* trigger acquisition */
            goto err;
      msleep(10);

      for (i = 0; i < 10; i++) {
            reg = STV090x_READ_DEMOD(state, DSTATUS);
            if (STV090x_GETFIELD_Px(reg, TMGLOCK_QUALITY_FIELD) >= 2)
                  tmg_cpt++;
            msleep(1);
      }
      if (tmg_cpt >= 3)
            tmg_lock = 1;

      if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, RTC, 0x88) < 0) /* DVB-S1 timing */
            goto err;
      if (STV090x_WRITE_DEMOD(state, RTCS2, 0x68) < 0) /* DVB-S2 timing */
            goto err;

      if (STV090x_WRITE_DEMOD(state, CARFREQ, freq) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHRISE, tmg_thh) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, TMGTHFALL, tmg_thl) < 0)
            goto err;

      return      tmg_lock;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_get_coldlock(struct stv090x_state *state, s32 timeout_dmd)
{
      struct dvb_frontend *fe = &state->frontend;

      u32 reg;
      s32 car_step, steps, cur_step, dir, freq, timeout_lock;
      int lock = 0;

      if (state->srate >= 10000000)
            timeout_lock = timeout_dmd / 3;
      else
            timeout_lock = timeout_dmd / 2;

      lock = stv090x_get_dmdlock(state, timeout_lock); /* cold start wait */
      if (!lock) {
            if (state->srate >= 10000000) {
                  if (stv090x_chk_tmg(state)) {
                        if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x15) < 0)
                              goto err;
                        lock = stv090x_get_dmdlock(state, timeout_dmd);
                  } else {
                        lock = 0;
                  }
            } else {
                  if (state->srate <= 4000000)
                        car_step = 1000;
                  else if (state->srate <= 7000000)
                        car_step = 2000;
                  else if (state->srate <= 10000000)
                        car_step = 3000;
                  else
                        car_step = 5000;

                  steps  = (state->search_range / 1000) / car_step;
                  steps /= 2;
                  steps  = 2 * (steps + 1);
                  if (steps < 0)
                        steps = 2;
                  else if (steps > 12)
                        steps = 12;

                  cur_step = 1;
                  dir = 1;

                  if (!lock) {
                        freq = state->frequency;
                        state->tuner_bw = stv090x_car_width(state->srate, state->rolloff) + state->srate;
                        while ((cur_step <= steps) && (!lock)) {
                              if (dir > 0)
                                    freq += cur_step * car_step;
                              else
                                    freq -= cur_step * car_step;

                              /* Setup tuner */
                              if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                                    goto err;

                              if (state->config->tuner_set_frequency) {
                                    if (state->config->tuner_set_frequency(fe, state->frequency) < 0)
                                          goto err;
                              }

                              if (state->config->tuner_set_bandwidth) {
                                    if (state->config->tuner_set_bandwidth(fe, state->tuner_bw) < 0)
                                          goto err;
                              }

                              if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                                    goto err;

                              msleep(50);

                              if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                                    goto err;

                              if (state->config->tuner_get_status) {
                                    if (state->config->tuner_get_status(fe, &reg) < 0)
                                          goto err;
                              }

                              if (reg)
                                    dprintk(FE_DEBUG, 1, "Tuner phase locked");
                              else
                                    dprintk(FE_DEBUG, 1, "Tuner unlocked");

                              if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                                    goto err;

                              STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1c);
                              if (state->delsys == STV090x_DVBS2) {
                                    reg = STV090x_READ_DEMOD(state, DMDCFGMD);
                                    STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 0);
                                    STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 0);
                                    if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                                          goto err;
                                    STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
                                    STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
                                    if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                                          goto err;
                              }
                              if (STV090x_WRITE_DEMOD(state, CFRINIT1, 0x00) < 0)
                                    goto err;
                              if (STV090x_WRITE_DEMOD(state, CFRINIT0, 0x00) < 0)
                                    goto err;
                              if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                                    goto err;
                              if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x15) < 0)
                                    goto err;
                              lock = stv090x_get_dmdlock(state, (timeout_dmd / 3));

                              dir *= -1;
                              cur_step++;
                        }
                  }
            }
      }

      return lock;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_get_loop_params(struct stv090x_state *state, s32 *freq_inc, s32 *timeout_sw, s32 *steps)
{
      s32 timeout, inc, steps_max, srate, car_max;

      srate = state->srate;
      car_max = state->search_range / 1000;
      car_max += car_max / 10;
      car_max  = 65536 * (car_max / 2);
      car_max /= (state->mclk / 1000);

      if (car_max > 0x4000)
            car_max = 0x4000 ; /* maxcarrier should be<= +-1/4 Mclk */

      inc  = srate;
      inc /= state->mclk / 1000;
      inc *= 256;
      inc *= 256;
      inc /= 1000;

      switch (state->search_mode) {
      case STV090x_SEARCH_DVBS1:
      case STV090x_SEARCH_DSS:
            inc *= 3; /* freq step = 3% of srate */
            timeout = 20;
            break;

      case STV090x_SEARCH_DVBS2:
            inc *= 4;
            timeout = 25;
            break;

      case STV090x_SEARCH_AUTO:
      default:
            inc *= 3;
            timeout = 25;
            break;
      }
      inc /= 100;
      if ((inc > car_max) || (inc < 0))
            inc = car_max / 2; /* increment <= 1/8 Mclk */

      timeout *= 27500; /* 27.5 Msps reference */
      if (srate > 0)
            timeout /= (srate / 1000);

      if ((timeout > 100) || (timeout < 0))
            timeout = 100;

      steps_max = (car_max / inc) + 1; /* min steps = 3 */
      if ((steps_max > 100) || (steps_max < 0)) {
            steps_max = 100; /* max steps <= 100 */
            inc = car_max / steps_max;
      }
      *freq_inc = inc;
      *timeout_sw = timeout;
      *steps = steps_max;

      return 0;
}

static int stv090x_chk_signal(struct stv090x_state *state)
{
      s32 offst_car, agc2, car_max;
      int no_signal;

      offst_car  = STV090x_READ_DEMOD(state, CFR2) << 8;
      offst_car |= STV090x_READ_DEMOD(state, CFR1);
      offst_car = comp2(offst_car, 16);

      agc2  = STV090x_READ_DEMOD(state, AGC2I1) << 8;
      agc2 |= STV090x_READ_DEMOD(state, AGC2I0);
      car_max = state->search_range / 1000;

      car_max += (car_max / 10); /* 10% margin */
      car_max  = (65536 * car_max / 2);
      car_max /= state->mclk / 1000;

      if (car_max > 0x4000)
            car_max = 0x4000;

      if ((agc2 > 0x2000) || (offst_car > 2 * car_max) || (offst_car < -2 * car_max)) {
            no_signal = 1;
            dprintk(FE_DEBUG, 1, "No Signal");
      } else {
            no_signal = 0;
            dprintk(FE_DEBUG, 1, "Found Signal");
      }

      return no_signal;
}

static int stv090x_search_car_loop(struct stv090x_state *state, s32 inc, s32 timeout, int zigzag, s32 steps_max)
{
      int no_signal, lock = 0;
      s32 cpt_step = 0, offst_freq, car_max;
      u32 reg;

      car_max  = state->search_range / 1000;
      car_max += (car_max / 10);
      car_max  = (65536 * car_max / 2);
      car_max /= (state->mclk / 1000);
      if (car_max > 0x4000)
            car_max = 0x4000;

      if (zigzag)
            offst_freq = 0;
      else
            offst_freq = -car_max + inc;

      do {
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1c) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT1, ((offst_freq / 256) & 0xff)) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT0, offst_freq & 0xff) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x18) < 0)
                  goto err;

            reg = STV090x_READ_DEMOD(state, PDELCTRL1);
            STV090x_SETFIELD_Px(reg, ALGOSWRST_FIELD, 0x1); /* stop DVB-S2 packet delin */
            if (STV090x_WRITE_DEMOD(state, PDELCTRL1, reg) < 0)
                  goto err;

            if (zigzag) {
                  if (offst_freq >= 0)
                        offst_freq = -offst_freq - 2 * inc;
                  else
                        offst_freq = -offst_freq;
            } else {
                  offst_freq += 2 * inc;
            }

            cpt_step++;

            lock = stv090x_get_dmdlock(state, timeout);
            no_signal = stv090x_chk_signal(state);

      } while ((!lock) &&
             (!no_signal) &&
              ((offst_freq - inc) < car_max) &&
              ((offst_freq + inc) > -car_max) &&
              (cpt_step < steps_max));

      reg = STV090x_READ_DEMOD(state, PDELCTRL1);
      STV090x_SETFIELD_Px(reg, ALGOSWRST_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, PDELCTRL1, reg) < 0)
                  goto err;

      return lock;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_sw_algo(struct stv090x_state *state)
{
      int no_signal, zigzag, lock = 0;
      u32 reg;

      s32 dvbs2_fly_wheel;
      s32 inc, timeout_step, trials, steps_max;

      /* get params */
      stv090x_get_loop_params(state, &inc, &timeout_step, &steps_max);

      switch (state->search_mode) {
      case STV090x_SEARCH_DVBS1:
      case STV090x_SEARCH_DSS:
            /* accelerate the frequency detector */
            if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x3B) < 0)
                        goto err;
            }

            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, 0x49) < 0)
                  goto err;
            zigzag = 0;
            break;

      case STV090x_SEARCH_DVBS2:
            if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
                        goto err;
            }

            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, 0x89) < 0)
                  goto err;
            zigzag = 1;
            break;

      case STV090x_SEARCH_AUTO:
      default:
            /* accelerate the frequency detector */
            if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x3b) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
                        goto err;
            }

            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, 0xc9) < 0)
                  goto err;
            zigzag = 0;
            break;
      }

      trials = 0;
      do {
            lock = stv090x_search_car_loop(state, inc, timeout_step, zigzag, steps_max);
            no_signal = stv090x_chk_signal(state);
            trials++;

            /*run the SW search 2 times maximum*/
            if (lock || no_signal || (trials == 2)) {
                  /*Check if the demod is not losing lock in DVBS2*/
                  if (state->dev_ver >= 0x20) {
                        if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x9e) < 0)
                              goto err;
                  }

                  reg = STV090x_READ_DEMOD(state, DMDSTATE);
                  if ((lock) && (STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD) == STV090x_DVBS2)) {
                        /*Check if the demod is not losing lock in DVBS2*/
                        msleep(timeout_step);
                        reg = STV090x_READ_DEMOD(state, DMDFLYW);
                        dvbs2_fly_wheel = STV090x_GETFIELD_Px(reg, FLYWHEEL_CPT_FIELD);
                        if (dvbs2_fly_wheel < 0xd) {   /*if correct frames is decrementing */
                              msleep(timeout_step);
                              reg = STV090x_READ_DEMOD(state, DMDFLYW);
                              dvbs2_fly_wheel = STV090x_GETFIELD_Px(reg, FLYWHEEL_CPT_FIELD);
                        }
                        if (dvbs2_fly_wheel < 0xd) {
                              /*FALSE lock, The demod is loosing lock */
                              lock = 0;
                              if (trials < 2) {
                                    if (state->dev_ver >= 0x20) {
                                          if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x79) < 0)
                                                goto err;
                                    }

                                    if (STV090x_WRITE_DEMOD(state, DMDCFGMD, 0x89) < 0)
                                          goto err;
                              }
                        }
                  }
            }
      } while ((!lock) && (trials < 2) && (!no_signal));

      return lock;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static enum stv090x_delsys stv090x_get_std(struct stv090x_state *state)
{
      u32 reg;
      enum stv090x_delsys delsys;

      reg = STV090x_READ_DEMOD(state, DMDSTATE);
      if (STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD) == 2)
            delsys = STV090x_DVBS2;
      else if (STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD) == 3) {
            reg = STV090x_READ_DEMOD(state, FECM);
            if (STV090x_GETFIELD_Px(reg, DSS_DVB_FIELD) == 1)
                  delsys = STV090x_DSS;
            else
                  delsys = STV090x_DVBS1;
      } else {
            delsys = STV090x_ERROR;
      }

      return delsys;
}

/* in Hz */
static s32 stv090x_get_car_freq(struct stv090x_state *state, u32 mclk)
{
      s32 derot, int_1, int_2, tmp_1, tmp_2;

      derot  = STV090x_READ_DEMOD(state, CFR2) << 16;
      derot |= STV090x_READ_DEMOD(state, CFR1) <<  8;
      derot |= STV090x_READ_DEMOD(state, CFR0);

      derot = comp2(derot, 24);
      int_1 = state->mclk >> 12;
      int_2 = derot >> 12;

      /* carrier_frequency = MasterClock * Reg / 2^24 */
      tmp_1 = state->mclk % 0x1000;
      tmp_2 = derot % 0x1000;

      derot = (int_1 * int_2) +
            ((int_1 * tmp_2) >> 12) +
            ((int_1 * tmp_1) >> 12);

      return derot;
}

static int stv090x_get_viterbi(struct stv090x_state *state)
{
      u32 reg, rate;

      reg = STV090x_READ_DEMOD(state, VITCURPUN);
      rate = STV090x_GETFIELD_Px(reg, VIT_CURPUN_FIELD);

      switch (rate) {
      case 13:
            state->fec = STV090x_PR12;
            break;

      case 18:
            state->fec = STV090x_PR23;
            break;

      case 21:
            state->fec = STV090x_PR34;
            break;

      case 24:
            state->fec = STV090x_PR56;
            break;

      case 25:
            state->fec = STV090x_PR67;
            break;

      case 26:
            state->fec = STV090x_PR78;
            break;

      default:
            state->fec = STV090x_PRERR;
            break;
      }

      return 0;
}

static enum stv090x_signal_state stv090x_get_sig_params(struct stv090x_state *state)
{
      struct dvb_frontend *fe = &state->frontend;

      u8 tmg;
      u32 reg;
      s32 i = 0, offst_freq;

      msleep(5);

      if (state->algo == STV090x_BLIND_SEARCH) {
            tmg = STV090x_READ_DEMOD(state, TMGREG2);
            STV090x_WRITE_DEMOD(state, SFRSTEP, 0x5c);
            while ((i <= 50) && (tmg != 0) && (tmg != 0xff)) {
                  tmg = STV090x_READ_DEMOD(state, TMGREG2);
                  msleep(5);
                  i += 5;
            }
      }
      state->delsys = stv090x_get_std(state);

      if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
            goto err;

      if (state->config->tuner_get_frequency) {
            if (state->config->tuner_get_frequency(fe, &state->frequency) < 0)
                  goto err;
      }

      if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
            goto err;

      offst_freq = stv090x_get_car_freq(state, state->mclk) / 1000;
      state->frequency += offst_freq;

      if (stv090x_get_viterbi(state) < 0)
            goto err;

      reg = STV090x_READ_DEMOD(state, DMDMODCOD);
      state->modcod = STV090x_GETFIELD_Px(reg, DEMOD_MODCOD_FIELD);
      state->pilots = STV090x_GETFIELD_Px(reg, DEMOD_TYPE_FIELD) & 0x01;
      state->frame_len = STV090x_GETFIELD_Px(reg, DEMOD_TYPE_FIELD) >> 1;
      reg = STV090x_READ_DEMOD(state, TMGOBS);
      state->rolloff = STV090x_GETFIELD_Px(reg, ROLLOFF_STATUS_FIELD);
      reg = STV090x_READ_DEMOD(state, FECM);
      state->inversion = STV090x_GETFIELD_Px(reg, IQINV_FIELD);

      if ((state->algo == STV090x_BLIND_SEARCH) || (state->srate < 10000000)) {

            if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                  goto err;

            if (state->config->tuner_get_frequency) {
                  if (state->config->tuner_get_frequency(fe, &state->frequency) < 0)
                        goto err;
            }

            if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                  goto err;

            if (abs(offst_freq) <= ((state->search_range / 2000) + 500))
                  return STV090x_RANGEOK;
            else if (abs(offst_freq) <= (stv090x_car_width(state->srate, state->rolloff) / 2000))
                  return STV090x_RANGEOK;
            else
                  return STV090x_OUTOFRANGE; /* Out of Range */
      } else {
            if (abs(offst_freq) <= ((state->search_range / 2000) + 500))
                  return STV090x_RANGEOK;
            else
                  return STV090x_OUTOFRANGE;
      }

      return STV090x_OUTOFRANGE;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static u32 stv090x_get_tmgoffst(struct stv090x_state *state, u32 srate)
{
      s32 offst_tmg;

      offst_tmg  = STV090x_READ_DEMOD(state, TMGREG2) << 16;
      offst_tmg |= STV090x_READ_DEMOD(state, TMGREG1) <<  8;
      offst_tmg |= STV090x_READ_DEMOD(state, TMGREG0);

      offst_tmg = comp2(offst_tmg, 24); /* 2's complement */
      if (!offst_tmg)
            offst_tmg = 1;

      offst_tmg  = ((s32) srate * 10) / ((s32) 0x1000000 / offst_tmg);
      offst_tmg /= 320;

      return offst_tmg;
}

static u8 stv090x_optimize_carloop(struct stv090x_state *state, enum stv090x_modcod modcod, s32 pilots)
{
      u8 aclc = 0x29;
      s32 i;
      struct stv090x_long_frame_crloop *car_loop, *car_loop_qpsk_low, *car_loop_apsk_low;

      if (state->dev_ver == 0x20) {
            car_loop          = stv090x_s2_crl_cut20;
            car_loop_qpsk_low = stv090x_s2_lowqpsk_crl_cut20;
            car_loop_apsk_low = stv090x_s2_apsk_crl_cut20;
      } else {
            /* >= Cut 3 */
            car_loop          = stv090x_s2_crl_cut30;
            car_loop_qpsk_low = stv090x_s2_lowqpsk_crl_cut30;
            car_loop_apsk_low = stv090x_s2_apsk_crl_cut30;
      }

      if (modcod < STV090x_QPSK_12) {
            i = 0;
            while ((i < 3) && (modcod != car_loop_qpsk_low[i].modcod))
                  i++;

            if (i >= 3)
                  i = 2;

      } else {
            i = 0;
            while ((i < 14) && (modcod != car_loop[i].modcod))
                  i++;

            if (i >= 14) {
                  i = 0;
                  while ((i < 11) && (modcod != car_loop_apsk_low[i].modcod))
                        i++;

                  if (i >= 11)
                        i = 10;
            }
      }

      if (modcod <= STV090x_QPSK_25) {
            if (pilots) {
                  if (state->srate <= 3000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_on_2;
                  else if (state->srate <= 7000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_on_5;
                  else if (state->srate <= 15000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_on_10;
                  else if (state->srate <= 25000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_on_20;
                  else
                        aclc = car_loop_qpsk_low[i].crl_pilots_on_30;
            } else {
                  if (state->srate <= 3000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_off_2;
                  else if (state->srate <= 7000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_off_5;
                  else if (state->srate <= 15000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_off_10;
                  else if (state->srate <= 25000000)
                        aclc = car_loop_qpsk_low[i].crl_pilots_off_20;
                  else
                        aclc = car_loop_qpsk_low[i].crl_pilots_off_30;
            }

      } else if (modcod <= STV090x_8PSK_910) {
            if (pilots) {
                  if (state->srate <= 3000000)
                        aclc = car_loop[i].crl_pilots_on_2;
                  else if (state->srate <= 7000000)
                        aclc = car_loop[i].crl_pilots_on_5;
                  else if (state->srate <= 15000000)
                        aclc = car_loop[i].crl_pilots_on_10;
                  else if (state->srate <= 25000000)
                        aclc = car_loop[i].crl_pilots_on_20;
                  else
                        aclc = car_loop[i].crl_pilots_on_30;
            } else {
                  if (state->srate <= 3000000)
                        aclc = car_loop[i].crl_pilots_off_2;
                  else if (state->srate <= 7000000)
                        aclc = car_loop[i].crl_pilots_off_5;
                  else if (state->srate <= 15000000)
                        aclc = car_loop[i].crl_pilots_off_10;
                  else if (state->srate <= 25000000)
                        aclc = car_loop[i].crl_pilots_off_20;
                  else
                        aclc = car_loop[i].crl_pilots_off_30;
            }
      } else { /* 16APSK and 32APSK */
            if (state->srate <= 3000000)
                  aclc = car_loop_apsk_low[i].crl_pilots_on_2;
            else if (state->srate <= 7000000)
                  aclc = car_loop_apsk_low[i].crl_pilots_on_5;
            else if (state->srate <= 15000000)
                  aclc = car_loop_apsk_low[i].crl_pilots_on_10;
            else if (state->srate <= 25000000)
                  aclc = car_loop_apsk_low[i].crl_pilots_on_20;
            else
                  aclc = car_loop_apsk_low[i].crl_pilots_on_30;
      }

      return aclc;
}

static u8 stv090x_optimize_carloop_short(struct stv090x_state *state)
{
      struct stv090x_short_frame_crloop *short_crl = NULL;
      s32 index = 0;
      u8 aclc = 0x0b;

      switch (state->modulation) {
      case STV090x_QPSK:
      default:
            index = 0;
            break;
      case STV090x_8PSK:
            index = 1;
            break;
      case STV090x_16APSK:
            index = 2;
            break;
      case STV090x_32APSK:
            index = 3;
            break;
      }

      if (state->dev_ver >= 0x30) {
            /* Cut 3.0 and up */
            short_crl = stv090x_s2_short_crl_cut30;
      } else {
            /* Cut 2.0 and up: we don't support cuts older than 2.0 */
            short_crl = stv090x_s2_short_crl_cut20;
      }

      if (state->srate <= 3000000)
            aclc = short_crl[index].crl_2;
      else if (state->srate <= 7000000)
            aclc = short_crl[index].crl_5;
      else if (state->srate <= 15000000)
            aclc = short_crl[index].crl_10;
      else if (state->srate <= 25000000)
            aclc = short_crl[index].crl_20;
      else
            aclc = short_crl[index].crl_30;

      return aclc;
}

static int stv090x_optimize_track(struct stv090x_state *state)
{
      struct dvb_frontend *fe = &state->frontend;

      enum stv090x_rolloff rolloff;
      enum stv090x_modcod modcod;

      s32 srate, pilots, aclc, f_1, f_0, i = 0, blind_tune = 0;
      u32 reg;

      srate  = stv090x_get_srate(state, state->mclk);
      srate += stv090x_get_tmgoffst(state, srate);

      switch (state->delsys) {
      case STV090x_DVBS1:
      case STV090x_DSS:
            if (state->algo == STV090x_SEARCH_AUTO) {
                  reg = STV090x_READ_DEMOD(state, DMDCFGMD);
                  STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
                  STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 0);
                  if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                        goto err;
            }
            reg = STV090x_READ_DEMOD(state, DEMOD);
            STV090x_SETFIELD_Px(reg, ROLLOFF_CONTROL_FIELD, state->rolloff);
            STV090x_SETFIELD_Px(reg, MANUAL_SXROLLOFF_FIELD, 0x01);
            if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
                  goto err;

            if (state->dev_ver >= 0x30) {
                  if (stv090x_get_viterbi(state) < 0)
                        goto err;

                  if (state->fec == STV090x_PR12) {
                        if (STV090x_WRITE_DEMOD(state, GAUSSR0, 0x98) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, CCIR0, 0x18) < 0)
                              goto err;
                  } else {
                        if (STV090x_WRITE_DEMOD(state, GAUSSR0, 0x18) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, CCIR0, 0x18) < 0)
                              goto err;
                  }
            }

            if (STV090x_WRITE_DEMOD(state, ERRCTRL1, 0x75) < 0)
                  goto err;
            break;

      case STV090x_DVBS2:
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 0);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, ACLC, 0) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, BCLC, 0) < 0)
                  goto err;
            if (state->frame_len == STV090x_LONG_FRAME) {
                  reg = STV090x_READ_DEMOD(state, DMDMODCOD);
                  modcod = STV090x_GETFIELD_Px(reg, DEMOD_MODCOD_FIELD);
                  pilots = STV090x_GETFIELD_Px(reg, DEMOD_TYPE_FIELD) & 0x01;
                  aclc = stv090x_optimize_carloop(state, modcod, pilots);
                  if (modcod <= STV090x_QPSK_910) {
                        STV090x_WRITE_DEMOD(state, ACLC2S2Q, aclc);
                  } else if (modcod <= STV090x_8PSK_910) {
                        if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, ACLC2S28, aclc) < 0)
                              goto err;
                  }
                  if ((state->demod_mode == STV090x_SINGLE) && (modcod > STV090x_8PSK_910)) {
                        if (modcod <= STV090x_16APSK_910) {
                              if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                                    goto err;
                              if (STV090x_WRITE_DEMOD(state, ACLC2S216A, aclc) < 0)
                                    goto err;
                        } else {
                              if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                                    goto err;
                              if (STV090x_WRITE_DEMOD(state, ACLC2S232A, aclc) < 0)
                                    goto err;
                        }
                  }
            } else {
                  /*Carrier loop setting for short frame*/
                  aclc = stv090x_optimize_carloop_short(state);
                  if (state->modulation == STV090x_QPSK) {
                        if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, aclc) < 0)
                              goto err;
                  } else if (state->modulation == STV090x_8PSK) {
                        if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, ACLC2S28, aclc) < 0)
                              goto err;
                  } else if (state->modulation == STV090x_16APSK) {
                        if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, ACLC2S216A, aclc) < 0)
                              goto err;
                  } else if (state->modulation == STV090x_32APSK)  {
                        if (STV090x_WRITE_DEMOD(state, ACLC2S2Q, 0x2a) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, ACLC2S232A, aclc) < 0)
                              goto err;
                  }
            }

            STV090x_WRITE_DEMOD(state, ERRCTRL1, 0x67); /* PER */
            break;

      case STV090x_UNKNOWN:
      default:
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, DVBS1_ENABLE_FIELD, 1);
            STV090x_SETFIELD_Px(reg, DVBS2_ENABLE_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;
            break;
      }

      f_1 = STV090x_READ_DEMOD(state, CFR2);
      f_0 = STV090x_READ_DEMOD(state, CFR1);
      reg = STV090x_READ_DEMOD(state, TMGOBS);
      rolloff = STV090x_GETFIELD_Px(reg, ROLLOFF_STATUS_FIELD);

      if (state->algo == STV090x_BLIND_SEARCH) {
            STV090x_WRITE_DEMOD(state, SFRSTEP, 0x00);
            reg = STV090x_READ_DEMOD(state, DMDCFGMD);
            STV090x_SETFIELD_Px(reg, SCAN_ENABLE_FIELD, 0x00);
            STV090x_SETFIELD_Px(reg, CFR_AUTOSCAN_FIELD, 0x00);
            if (STV090x_WRITE_DEMOD(state, DMDCFGMD, reg) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGCFG2, 0xc1) < 0)
                  goto err;

            if (stv090x_set_srate(state, srate) < 0)
                  goto err;
            blind_tune = 1;
      }

      if (state->dev_ver >= 0x20) {
            if ((state->search_mode == STV090x_SEARCH_DVBS1)      ||
                (state->search_mode == STV090x_SEARCH_DSS)        ||
                (state->search_mode == STV090x_SEARCH_AUTO)) {

                  if (STV090x_WRITE_DEMOD(state, VAVSRVIT, 0x0a) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, VITSCALE, 0x00) < 0)
                        goto err;
            }
      }

      if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
            goto err;

      /* AUTO tracking MODE */
      if (STV090x_WRITE_DEMOD(state, SFRUP1, 0x80) < 0)
            goto err;
      /* AUTO tracking MODE */
      if (STV090x_WRITE_DEMOD(state, SFRLOW1, 0x80) < 0)
            goto err;

      if ((state->dev_ver >= 0x20) || (blind_tune == 1) || (state->srate < 10000000)) {
            /* update initial carrier freq with the found freq offset */
            if (STV090x_WRITE_DEMOD(state, CFRINIT1, f_1) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CFRINIT0, f_0) < 0)
                  goto err;
            state->tuner_bw = stv090x_car_width(srate, state->rolloff) + 10000000;

            if ((state->dev_ver >= 0x20) || (blind_tune == 1)) {

                  if (state->algo != STV090x_WARM_SEARCH) {

                        if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
                              goto err;

                        if (state->config->tuner_set_bandwidth) {
                              if (state->config->tuner_set_bandwidth(fe, state->tuner_bw) < 0)
                                    goto err;
                        }

                        if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
                              goto err;

                  }
            }
            if ((state->algo == STV090x_BLIND_SEARCH) || (state->srate < 10000000))
                  msleep(50); /* blind search: wait 50ms for SR stabilization */
            else
                  msleep(5);

            stv090x_get_lock_tmg(state);

            if (!(stv090x_get_dmdlock(state, (state->DemodTimeout / 2)))) {
                  if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRINIT1, f_1) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, CFRINIT0, f_0) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x18) < 0)
                        goto err;

                  i = 0;

                  while ((!(stv090x_get_dmdlock(state, (state->DemodTimeout / 2)))) && (i <= 2)) {

                        if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x1f) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, CFRINIT1, f_1) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, CFRINIT0, f_0) < 0)
                              goto err;
                        if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x18) < 0)
                              goto err;
                        i++;
                  }
            }

      }

      if (state->dev_ver >= 0x20) {
            if (STV090x_WRITE_DEMOD(state, CARFREQ, 0x49) < 0)
                  goto err;
      }

      if ((state->delsys == STV090x_DVBS1) || (state->delsys == STV090x_DSS))
            stv090x_set_vit_thtracq(state);

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_get_feclock(struct stv090x_state *state, s32 timeout)
{
      s32 timer = 0, lock = 0, stat;
      u32 reg;

      while ((timer < timeout) && (!lock)) {
            reg = STV090x_READ_DEMOD(state, DMDSTATE);
            stat = STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD);

            switch (stat) {
            case 0: /* searching */
            case 1: /* first PLH detected */
            default:
                  lock = 0;
                  break;

            case 2: /* DVB-S2 mode */
                  reg = STV090x_READ_DEMOD(state, PDELSTATUS1);
                  lock = STV090x_GETFIELD_Px(reg, PKTDELIN_LOCK_FIELD);
                  break;

            case 3: /* DVB-S1/legacy mode */
                  reg = STV090x_READ_DEMOD(state, VSTATUSVIT);
                  lock = STV090x_GETFIELD_Px(reg, LOCKEDVIT_FIELD);
                  break;
            }
            if (!lock) {
                  msleep(10);
                  timer += 10;
            }
      }
      return lock;
}

static int stv090x_get_lock(struct stv090x_state *state, s32 timeout_dmd, s32 timeout_fec)
{
      u32 reg;
      s32 timer = 0;
      int lock;

      lock = stv090x_get_dmdlock(state, timeout_dmd);
      if (lock)
            lock = stv090x_get_feclock(state, timeout_fec);

      if (lock) {
            lock = 0;

            while ((timer < timeout_fec) && (!lock)) {
                  reg = STV090x_READ_DEMOD(state, TSSTATUS);
                  lock = STV090x_GETFIELD_Px(reg, TSFIFO_LINEOK_FIELD);
                  msleep(1);
                  timer++;
            }
      }

      return lock;
}

static int stv090x_set_s2rolloff(struct stv090x_state *state)
{
      u32 reg;

      if (state->dev_ver <= 0x20) {
            /* rolloff to auto mode if DVBS2 */
            reg = STV090x_READ_DEMOD(state, DEMOD);
            STV090x_SETFIELD_Px(reg, MANUAL_SXROLLOFF_FIELD, 0x00);
            if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
                  goto err;
      } else {
            /* DVB-S2 rolloff to auto mode if DVBS2 */
            reg = STV090x_READ_DEMOD(state, DEMOD);
            STV090x_SETFIELD_Px(reg, MANUAL_S2ROLLOFF_FIELD, 0x00);
            if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
                  goto err;
      }
      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}


static enum stv090x_signal_state stv090x_algo(struct stv090x_state *state)
{
      struct dvb_frontend *fe = &state->frontend;
      enum stv090x_signal_state signal_state = STV090x_NOCARRIER;
      u32 reg;
      s32 timeout_dmd = 500, timeout_fec = 50, agc1_power, power_iq = 0, i;
      int lock = 0, low_sr = 0, no_signal = 0;

      reg = STV090x_READ_DEMOD(state, TSCFGH);
      STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 1); /* Stop path 1 stream merger */
      if (STV090x_WRITE_DEMOD(state, TSCFGH, reg) < 0)
            goto err;

      if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5c) < 0) /* Demod stop */
            goto err;

      if (state->dev_ver >= 0x20) {
            if (STV090x_WRITE_DEMOD(state, CORRELABS, 0x9e) < 0) /* cut 2.0 */
                  goto err;
      }

      stv090x_get_lock_tmg(state);

      if (state->algo == STV090x_BLIND_SEARCH) {
            state->tuner_bw = 2 * 36000000; /* wide bw for unknown srate */
            if (STV090x_WRITE_DEMOD(state, TMGCFG2, 0xc0) < 0) /* wider srate scan */
                  goto err;
            if (STV090x_WRITE_DEMOD(state, CORRELMANT, 0x70) < 0)
                  goto err;
            if (stv090x_set_srate(state, 1000000) < 0) /* inital srate = 1Msps */
                  goto err;
      } else {
            /* known srate */
            if (STV090x_WRITE_DEMOD(state, DMDTOM, 0x20) < 0)
                  goto err;
            if (STV090x_WRITE_DEMOD(state, TMGCFG, 0xd2) < 0)
                  goto err;

            if (state->srate < 2000000) {
                  /* SR < 2MSPS */
                  if (STV090x_WRITE_DEMOD(state, CORRELMANT, 0x63) < 0)
                        goto err;
            } else {
                  /* SR >= 2Msps */
                  if (STV090x_WRITE_DEMOD(state, CORRELMANT, 0x70) < 0)
                        goto err;
            }

            if (STV090x_WRITE_DEMOD(state, AGC2REF, 0x38) < 0)
                  goto err;

            if (state->dev_ver >= 0x20) {
                  if (STV090x_WRITE_DEMOD(state, KREFTMG, 0x5a) < 0)
                        goto err;
                  if (state->algo == STV090x_COLD_SEARCH)
                        state->tuner_bw = (15 * (stv090x_car_width(state->srate, state->rolloff) + 10000000)) / 10;
                  else if (state->algo == STV090x_WARM_SEARCH)
                        state->tuner_bw = stv090x_car_width(state->srate, state->rolloff) + 10000000;
            }

            /* if cold start or warm  (Symbolrate is known)
             * use a Narrow symbol rate scan range
             */
            if (STV090x_WRITE_DEMOD(state, TMGCFG2, 0xc1) < 0) /* narrow srate scan */
                  goto err;

            if (stv090x_set_srate(state, state->srate) < 0)
                  goto err;

            if (stv090x_set_max_srate(state, state->mclk, state->srate) < 0)
                  goto err;
            if (stv090x_set_min_srate(state, state->mclk, state->srate) < 0)
                  goto err;

            if (state->srate >= 10000000)
                  low_sr = 0;
            else
                  low_sr = 1;
      }

      /* Setup tuner */
      if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
            goto err;

      if (state->config->tuner_set_bbgain) {
            if (state->config->tuner_set_bbgain(fe, 10) < 0) /* 10dB */
                  goto err;
      }

      if (state->config->tuner_set_frequency) {
            if (state->config->tuner_set_frequency(fe, state->frequency) < 0)
                  goto err;
      }

      if (state->config->tuner_set_bandwidth) {
            if (state->config->tuner_set_bandwidth(fe, state->tuner_bw) < 0)
                  goto err;
      }

      if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
            goto err;

      msleep(50);

      if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
            goto err;

      if (state->config->tuner_get_status) {
            if (state->config->tuner_get_status(fe, &reg) < 0)
                  goto err;
      }

      if (reg)
            dprintk(FE_DEBUG, 1, "Tuner phase locked");
      else
            dprintk(FE_DEBUG, 1, "Tuner unlocked");

      if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
            goto err;

      msleep(10);
      agc1_power = MAKEWORD16(STV090x_READ_DEMOD(state, AGCIQIN1),
                        STV090x_READ_DEMOD(state, AGCIQIN0));

      if (agc1_power == 0) {
            /* If AGC1 integrator value is 0
             * then read POWERI, POWERQ
             */
            for (i = 0; i < 5; i++) {
                  power_iq += (STV090x_READ_DEMOD(state, POWERI) +
                             STV090x_READ_DEMOD(state, POWERQ)) >> 1;
            }
            power_iq /= 5;
      }

      if ((agc1_power == 0) && (power_iq < STV090x_IQPOWER_THRESHOLD)) {
            dprintk(FE_ERROR, 1, "No Signal: POWER_IQ=0x%02x", power_iq);
            lock = 0;

      } else {
            reg = STV090x_READ_DEMOD(state, DEMOD);
            STV090x_SETFIELD_Px(reg, SPECINV_CONTROL_FIELD, state->inversion);

            if (state->dev_ver <= 0x20) {
                  /* rolloff to auto mode if DVBS2 */
                  STV090x_SETFIELD_Px(reg, MANUAL_SXROLLOFF_FIELD, 1);
            } else {
                  /* DVB-S2 rolloff to auto mode if DVBS2 */
                  STV090x_SETFIELD_Px(reg, MANUAL_S2ROLLOFF_FIELD, 1);
            }
            if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
                  goto err;

            if (stv090x_delivery_search(state) < 0)
                  goto err;

            if (state->algo != STV090x_BLIND_SEARCH) {
                  if (stv090x_start_search(state) < 0)
                        goto err;
            }
      }

      /* need to check for AGC1 state */



      if (state->algo == STV090x_BLIND_SEARCH)
            lock = stv090x_blind_search(state);

      else if (state->algo == STV090x_COLD_SEARCH)
            lock = stv090x_get_coldlock(state, timeout_dmd);

      else if (state->algo == STV090x_WARM_SEARCH)
            lock = stv090x_get_dmdlock(state, timeout_dmd);

      if ((!lock) && (state->algo == STV090x_COLD_SEARCH)) {
            if (!low_sr) {
                  if (stv090x_chk_tmg(state))
                        lock = stv090x_sw_algo(state);
            }
      }

      if (lock)
            signal_state = stv090x_get_sig_params(state);

      if ((lock) && (signal_state == STV090x_RANGEOK)) { /* signal within Range */
            stv090x_optimize_track(state);

            if (state->dev_ver >= 0x20) {
                  /* >= Cut 2.0 :release TS reset after
                   * demod lock and optimized Tracking
                   */
                  reg = STV090x_READ_DEMOD(state, TSCFGH);
                  STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0); /* release merger reset */
                  if (STV090x_WRITE_DEMOD(state, TSCFGH, reg) < 0)
                        goto err;

                  msleep(3);

                  STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 1); /* merger reset */
                  if (STV090x_WRITE_DEMOD(state, TSCFGH, reg) < 0)
                        goto err;

                  STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0); /* release merger reset */
                  if (STV090x_WRITE_DEMOD(state, TSCFGH, reg) < 0)
                        goto err;
            }

            if (stv090x_get_lock(state, timeout_fec, timeout_fec)) {
                  lock = 1;
                  if (state->delsys == STV090x_DVBS2) {
                        stv090x_set_s2rolloff(state);

                        reg = STV090x_READ_DEMOD(state, PDELCTRL2);
                        STV090x_SETFIELD_Px(reg, RESET_UPKO_COUNT, 1);
                        if (STV090x_WRITE_DEMOD(state, PDELCTRL2, reg) < 0)
                              goto err;
                        /* Reset DVBS2 packet delinator error counter */
                        reg = STV090x_READ_DEMOD(state, PDELCTRL2);
                        STV090x_SETFIELD_Px(reg, RESET_UPKO_COUNT, 0);
                        if (STV090x_WRITE_DEMOD(state, PDELCTRL2, reg) < 0)
                              goto err;

                        if (STV090x_WRITE_DEMOD(state, ERRCTRL1, 0x67) < 0) /* PER */
                              goto err;
                  } else {
                        if (STV090x_WRITE_DEMOD(state, ERRCTRL1, 0x75) < 0)
                              goto err;
                  }
                  /* Reset the Total packet counter */
                  if (STV090x_WRITE_DEMOD(state, FBERCPT4, 0x00) < 0)
                        goto err;
                  /* Reset the packet Error counter2 */
                  if (STV090x_WRITE_DEMOD(state, ERRCTRL2, 0xc1) < 0)
                        goto err;
            } else {
                  lock = 0;
                  signal_state = STV090x_NODATA;
                  no_signal = stv090x_chk_signal(state);
            }
      }
      return signal_state;

err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static enum dvbfe_search stv090x_search(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
{
      struct stv090x_state *state = fe->demodulator_priv;
      struct dtv_frontend_properties *props = &fe->dtv_property_cache;

      state->delsys = props->delivery_system;
      state->frequency = p->frequency;
      state->srate = p->u.qpsk.symbol_rate;
      state->search_mode = STV090x_SEARCH_AUTO;
      state->algo = STV090x_COLD_SEARCH;
      state->fec = STV090x_PRERR;
      state->search_range = 2000000;

      if (stv090x_algo(state) == STV090x_RANGEOK) {
            dprintk(FE_DEBUG, 1, "Search success!");
            return DVBFE_ALGO_SEARCH_SUCCESS;
      } else {
            dprintk(FE_DEBUG, 1, "Search failed!");
            return DVBFE_ALGO_SEARCH_FAILED;
      }

      return DVBFE_ALGO_SEARCH_ERROR;
}

/* FIXME! */
static int stv090x_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;
      u8 search_state;

      reg = STV090x_READ_DEMOD(state, DMDSTATE);
      search_state = STV090x_GETFIELD_Px(reg, HEADER_MODE_FIELD);

      switch (search_state) {
      case 0: /* searching */
      case 1: /* first PLH detected */
      default:
            dprintk(FE_DEBUG, 1, "Status: Unlocked (Searching ..)");
            *status = 0;
            break;

      case 2: /* DVB-S2 mode */
            dprintk(FE_DEBUG, 1, "Delivery system: DVB-S2");
            reg = STV090x_READ_DEMOD(state, DSTATUS);
            if (STV090x_GETFIELD_Px(reg, LOCK_DEFINITIF_FIELD)) {
                  reg = STV090x_READ_DEMOD(state, TSSTATUS);
                  if (STV090x_GETFIELD_Px(reg, TSFIFO_LINEOK_FIELD)) {
                        *status = FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
                  }
            }
            break;

      case 3: /* DVB-S1/legacy mode */
            dprintk(FE_DEBUG, 1, "Delivery system: DVB-S");
            reg = STV090x_READ_DEMOD(state, DSTATUS);
            if (STV090x_GETFIELD_Px(reg, LOCK_DEFINITIF_FIELD)) {
                  reg = STV090x_READ_DEMOD(state, VSTATUSVIT);
                  if (STV090x_GETFIELD_Px(reg, LOCKEDVIT_FIELD)) {
                        reg = STV090x_READ_DEMOD(state, TSSTATUS);
                        if (STV090x_GETFIELD_Px(reg, TSFIFO_LINEOK_FIELD)) {
                              *status = FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
                        }
                  }
            }
            break;
      }

      return 0;
}

static int stv090x_read_per(struct dvb_frontend *fe, u32 *per)
{
      struct stv090x_state *state = fe->demodulator_priv;

      s32 count_4, count_3, count_2, count_1, count_0, count;
      u32 reg, h, m, l;
      enum fe_status status;

      stv090x_read_status(fe, &status);
      if (!(status & FE_HAS_LOCK)) {
            *per = 1 << 23; /* Max PER */
      } else {
            /* Counter 2 */
            reg = STV090x_READ_DEMOD(state, ERRCNT22);
            h = STV090x_GETFIELD_Px(reg, ERR_CNT2_FIELD);

            reg = STV090x_READ_DEMOD(state, ERRCNT21);
            m = STV090x_GETFIELD_Px(reg, ERR_CNT21_FIELD);

            reg = STV090x_READ_DEMOD(state, ERRCNT20);
            l = STV090x_GETFIELD_Px(reg, ERR_CNT20_FIELD);

            *per = ((h << 16) | (m << 8) | l);

            count_4 = STV090x_READ_DEMOD(state, FBERCPT4);
            count_3 = STV090x_READ_DEMOD(state, FBERCPT3);
            count_2 = STV090x_READ_DEMOD(state, FBERCPT2);
            count_1 = STV090x_READ_DEMOD(state, FBERCPT1);
            count_0 = STV090x_READ_DEMOD(state, FBERCPT0);

            if ((!count_4) && (!count_3)) {
                  count  = (count_2 & 0xff) << 16;
                  count |= (count_1 & 0xff) <<  8;
                  count |=  count_0 & 0xff;
            } else {
                  count = 1 << 24;
            }
            if (count == 0)
                  *per = 1;
      }
      if (STV090x_WRITE_DEMOD(state, FBERCPT4, 0) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, ERRCTRL2, 0xc1) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_table_lookup(const struct stv090x_tab *tab, int max, int val)
{
      int res = 0;
      int min = 0, med;

      if (val < tab[min].read)
            res = tab[min].real;
      else if (val >= tab[max].read)
            res = tab[max].real;
      else {
            while ((max - min) > 1) {
                  med = (max + min) / 2;
                  if (val >= tab[min].read && val < tab[med].read)
                        max = med;
                  else
                        min = med;
            }
            res = ((val - tab[min].read) *
                   (tab[max].real - tab[min].real) /
                   (tab[max].read - tab[min].read)) +
                  tab[min].real;
      }

      return res;
}

static int stv090x_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;
      s32 agc;

      reg = STV090x_READ_DEMOD(state, AGCIQIN1);
      agc = STV090x_GETFIELD_Px(reg, AGCIQ_VALUE_FIELD);

      *strength = stv090x_table_lookup(stv090x_rf_tab, ARRAY_SIZE(stv090x_rf_tab) - 1, agc);
      if (agc > stv090x_rf_tab[0].read)
            *strength = 5;
      else if (agc < stv090x_rf_tab[ARRAY_SIZE(stv090x_rf_tab) - 1].read)
            *strength = -100;

      return 0;
}

static int stv090x_read_cnr(struct dvb_frontend *fe, u16 *cnr)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg_0, reg_1, reg, i;
      s32 val_0, val_1, val = 0;
      u8 lock_f;

      switch (state->delsys) {
      case STV090x_DVBS2:
            reg = STV090x_READ_DEMOD(state, DSTATUS);
            lock_f = STV090x_GETFIELD_Px(reg, LOCK_DEFINITIF_FIELD);
            if (lock_f) {
                  msleep(5);
                  for (i = 0; i < 16; i++) {
                        reg_1 = STV090x_READ_DEMOD(state, NNOSPLHT1);
                        val_1 = STV090x_GETFIELD_Px(reg_1, NOSPLHT_NORMED_FIELD);
                        reg_0 = STV090x_READ_DEMOD(state, NNOSPLHT0);
                        val_0 = STV090x_GETFIELD_Px(reg_1, NOSPLHT_NORMED_FIELD);
                        val  += MAKEWORD16(val_1, val_0);
                        msleep(1);
                  }
                  val /= 16;
                  *cnr = stv090x_table_lookup(stv090x_s2cn_tab, ARRAY_SIZE(stv090x_s2cn_tab) - 1, val);
                  if (val < stv090x_s2cn_tab[ARRAY_SIZE(stv090x_s2cn_tab) - 1].read)
                        *cnr = 1000;
            }
            break;

      case STV090x_DVBS1:
      case STV090x_DSS:
            reg = STV090x_READ_DEMOD(state, DSTATUS);
            lock_f = STV090x_GETFIELD_Px(reg, LOCK_DEFINITIF_FIELD);
            if (lock_f) {
                  msleep(5);
                  for (i = 0; i < 16; i++) {
                        reg_1 = STV090x_READ_DEMOD(state, NOSDATAT1);
                        val_1 = STV090x_GETFIELD_Px(reg_1, NOSDATAT_UNNORMED_FIELD);
                        reg_0 = STV090x_READ_DEMOD(state, NOSDATAT0);
                        val_0 = STV090x_GETFIELD_Px(reg_1, NOSDATAT_UNNORMED_FIELD);
                        val  += MAKEWORD16(val_1, val_0);
                        msleep(1);
                  }
                  val /= 16;
                  *cnr = stv090x_table_lookup(stv090x_s1cn_tab, ARRAY_SIZE(stv090x_s1cn_tab) - 1, val);
                  if (val < stv090x_s2cn_tab[ARRAY_SIZE(stv090x_s1cn_tab) - 1].read)
                        *cnr = 1000;
            }
            break;
      default:
            break;
      }

      return 0;
}

static int stv090x_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;

      reg = STV090x_READ_DEMOD(state, DISTXCTL);
      switch (tone) {
      case SEC_TONE_ON:
            STV090x_SETFIELD_Px(reg, DISTX_MODE_FIELD, 0);
            STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
                  goto err;
            STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 0);
            if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
                  goto err;
            break;

      case SEC_TONE_OFF:
            STV090x_SETFIELD_Px(reg, DISTX_MODE_FIELD, 0);
            STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 1);
            if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
                  goto err;
            break;
      default:
            return -EINVAL;
      }

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}


static enum dvbfe_algo stv090x_frontend_algo(struct dvb_frontend *fe)
{
      return DVBFE_ALGO_CUSTOM;
}

static int stv090x_send_diseqc_msg(struct dvb_frontend *fe, struct dvb_diseqc_master_cmd *cmd)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg, idle = 0, fifo_full = 1;
      int i;

      reg = STV090x_READ_DEMOD(state, DISTXCTL);

      STV090x_SETFIELD_Px(reg, DISTX_MODE_FIELD, 2);
      STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;
      STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      STV090x_SETFIELD_Px(reg, DIS_PRECHARGE_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      for (i = 0; i < cmd->msg_len; i++) {

            while (fifo_full) {
                  reg = STV090x_READ_DEMOD(state, DISTXSTATUS);
                  fifo_full = STV090x_GETFIELD_Px(reg, FIFO_FULL_FIELD);
            }

            if (STV090x_WRITE_DEMOD(state, DISTXDATA, cmd->msg[i]) < 0)
                  goto err;
      }
      reg = STV090x_READ_DEMOD(state, DISTXCTL);
      STV090x_SETFIELD_Px(reg, DIS_PRECHARGE_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      i = 0;

      while ((!idle) && (i < 10)) {
            reg = STV090x_READ_DEMOD(state, DISTXSTATUS);
            idle = STV090x_GETFIELD_Px(reg, TX_IDLE_FIELD);
            msleep(10);
            i++;
      }

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_send_diseqc_burst(struct dvb_frontend *fe, fe_sec_mini_cmd_t burst)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg, idle = 0, fifo_full = 1;
      u8 mode, value;
      int i;

      reg = STV090x_READ_DEMOD(state, DISTXCTL);

      if (burst == SEC_MINI_A) {
            mode = 3;
            value = 0x00;
      } else {
            mode = 2;
            value = 0xFF;
      }

      STV090x_SETFIELD_Px(reg, DISTX_MODE_FIELD, mode);
      STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;
      STV090x_SETFIELD_Px(reg, DISEQC_RESET_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      STV090x_SETFIELD_Px(reg, DIS_PRECHARGE_FIELD, 1);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      while (fifo_full) {
            reg = STV090x_READ_DEMOD(state, DISTXSTATUS);
            fifo_full = STV090x_GETFIELD_Px(reg, FIFO_FULL_FIELD);
      }

      if (STV090x_WRITE_DEMOD(state, DISTXDATA, value) < 0)
            goto err;

      reg = STV090x_READ_DEMOD(state, DISTXCTL);
      STV090x_SETFIELD_Px(reg, DIS_PRECHARGE_FIELD, 0);
      if (STV090x_WRITE_DEMOD(state, DISTXCTL, reg) < 0)
            goto err;

      i = 0;

      while ((!idle) && (i < 10)) {
            reg = STV090x_READ_DEMOD(state, DISTXSTATUS);
            idle = STV090x_GETFIELD_Px(reg, TX_IDLE_FIELD);
            msleep(10);
            i++;
      }

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_recv_slave_reply(struct dvb_frontend *fe, struct dvb_diseqc_slave_reply *reply)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg = 0, i = 0, rx_end = 0;

      while ((rx_end != 1) && (i < 10)) {
            msleep(10);
            i++;
            reg = STV090x_READ_DEMOD(state, DISRX_ST0);
            rx_end = STV090x_GETFIELD_Px(reg, RX_END_FIELD);
      }

      if (rx_end) {
            reply->msg_len = STV090x_GETFIELD_Px(reg, FIFO_BYTENBR_FIELD);
            for (i = 0; i < reply->msg_len; i++)
                  reply->msg[i] = STV090x_READ_DEMOD(state, DISRXDATA);
      }

      return 0;
}

static int stv090x_sleep(struct dvb_frontend *fe)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;

      dprintk(FE_DEBUG, 1, "Set %s to sleep",
            state->device == STV0900 ? "STV0900" : "STV0903");

      reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
      STV090x_SETFIELD(reg, STANDBY_FIELD, 0x01);
      if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
            goto err;

      reg = stv090x_read_reg(state, STV090x_TSTTNR1);
      STV090x_SETFIELD(reg, ADC1_PON_FIELD, 0);
      if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_wakeup(struct dvb_frontend *fe)
{
      struct stv090x_state *state = fe->demodulator_priv;
      u32 reg;

      dprintk(FE_DEBUG, 1, "Wake %s from standby",
            state->device == STV0900 ? "STV0900" : "STV0903");

      reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
      STV090x_SETFIELD(reg, STANDBY_FIELD, 0x00);
      if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
            goto err;

      reg = stv090x_read_reg(state, STV090x_TSTTNR1);
      STV090x_SETFIELD(reg, ADC1_PON_FIELD, 1);
      if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static void stv090x_release(struct dvb_frontend *fe)
{
      struct stv090x_state *state = fe->demodulator_priv;

      kfree(state);
}

static int stv090x_ldpc_mode(struct stv090x_state *state, enum stv090x_mode ldpc_mode)
{
      u32 reg = 0;

      switch (ldpc_mode) {
      case STV090x_DUAL:
      default:
            if ((state->demod_mode != STV090x_DUAL) || (STV090x_GETFIELD(reg, DDEMOD_FIELD) != 1)) {
                  /* set LDPC to dual mode */
                  if (stv090x_write_reg(state, STV090x_GENCFG, 0x1d) < 0)
                        goto err;

                  state->demod_mode = STV090x_DUAL;

                  reg = stv090x_read_reg(state, STV090x_TSTRES0);
                  STV090x_SETFIELD(reg, FRESFEC_FIELD, 0x1);
                  if (stv090x_write_reg(state, STV090x_TSTRES0, reg) < 0)
                        goto err;
                  STV090x_SETFIELD(reg, FRESFEC_FIELD, 0x0);
                  if (stv090x_write_reg(state, STV090x_TSTRES0, reg) < 0)
                        goto err;

                  if (STV090x_WRITE_DEMOD(state, MODCODLST0, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST1, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST2, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST3, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST4, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST5, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST6, 0xff) < 0)
                        goto err;

                  if (STV090x_WRITE_DEMOD(state, MODCODLST7, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST8, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLST9, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLSTA, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLSTB, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLSTC, 0xcc) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLSTD, 0xcc) < 0)
                        goto err;

                  if (STV090x_WRITE_DEMOD(state, MODCODLSTE, 0xff) < 0)
                        goto err;
                  if (STV090x_WRITE_DEMOD(state, MODCODLSTF, 0xcf) < 0)
                        goto err;
            }
            break;

      case STV090x_SINGLE:
            if (stv090x_stop_modcod(state) < 0)
                  goto err;
            if (stv090x_activate_modcod_single(state) < 0)
                  goto err;

            if (state->demod == STV090x_DEMODULATOR_1) {
                  if (stv090x_write_reg(state, STV090x_GENCFG, 0x06) < 0) /* path 2 */
                        goto err;
            } else {
                  if (stv090x_write_reg(state, STV090x_GENCFG, 0x04) < 0) /* path 1 */
                        goto err;
            }

            reg = stv090x_read_reg(state, STV090x_TSTRES0);
            STV090x_SETFIELD(reg, FRESFEC_FIELD, 0x1);
            if (stv090x_write_reg(state, STV090x_TSTRES0, reg) < 0)
                  goto err;
            STV090x_SETFIELD(reg, FRESFEC_FIELD, 0x0);
            if (stv090x_write_reg(state, STV090x_TSTRES0, reg) < 0)
                  goto err;

            reg = STV090x_READ_DEMOD(state, PDELCTRL1);
            STV090x_SETFIELD_Px(reg, ALGOSWRST_FIELD, 0x01);
            if (STV090x_WRITE_DEMOD(state, PDELCTRL1, reg) < 0)
                  goto err;
            STV090x_SETFIELD_Px(reg, ALGOSWRST_FIELD, 0x00);
            if (STV090x_WRITE_DEMOD(state, PDELCTRL1, reg) < 0)
                  goto err;
            break;
      }

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

/* return (Hz), clk in Hz*/
static u32 stv090x_get_mclk(struct stv090x_state *state)
{
      const struct stv090x_config *config = state->config;
      u32 div, reg;
      u8 ratio;

      div = stv090x_read_reg(state, STV090x_NCOARSE);
      reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
      ratio = STV090x_GETFIELD(reg, SELX1RATIO_FIELD) ? 4 : 6;

      return (div + 1) * config->xtal / ratio; /* kHz */
}

static int stv090x_set_mclk(struct stv090x_state *state, u32 mclk, u32 clk)
{
      const struct stv090x_config *config = state->config;
      u32 reg, div, clk_sel;

      reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
      clk_sel = ((STV090x_GETFIELD(reg, SELX1RATIO_FIELD) == 1) ? 4 : 6);

      div = ((clk_sel * mclk) / config->xtal) - 1;

      reg = stv090x_read_reg(state, STV090x_NCOARSE);
      STV090x_SETFIELD(reg, M_DIV_FIELD, div);
      if (stv090x_write_reg(state, STV090x_NCOARSE, reg) < 0)
            goto err;

      state->mclk = stv090x_get_mclk(state);

      /*Set the DiseqC frequency to 22KHz */
      div = state->mclk / 704000;
      if (STV090x_WRITE_DEMOD(state, F22TX, div) < 0)
            goto err;
      if (STV090x_WRITE_DEMOD(state, F22RX, div) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_set_tspath(struct stv090x_state *state)
{
      u32 reg;

      if (state->dev_ver >= 0x20) {
            switch (state->config->ts1_mode) {
            case STV090x_TSMODE_PARALLEL_PUNCTURED:
            case STV090x_TSMODE_DVBCI:
                  switch (state->config->ts2_mode) {
                  case STV090x_TSMODE_SERIAL_PUNCTURED:
                  case STV090x_TSMODE_SERIAL_CONTINUOUS:
                  default:
                        stv090x_write_reg(state, STV090x_TSGENERAL, 0x00);
                        break;

                  case STV090x_TSMODE_PARALLEL_PUNCTURED:
                  case STV090x_TSMODE_DVBCI:
                        if (stv090x_write_reg(state, STV090x_TSGENERAL, 0x06) < 0) /* Mux'd stream mode */
                              goto err;
                        reg = stv090x_read_reg(state, STV090x_P1_TSCFGM);
                        STV090x_SETFIELD_Px(reg, TSFIFO_MANSPEED_FIELD, 3);
                        if (stv090x_write_reg(state, STV090x_P1_TSCFGM, reg) < 0)
                              goto err;
                        reg = stv090x_read_reg(state, STV090x_P2_TSCFGM);
                        STV090x_SETFIELD_Px(reg, TSFIFO_MANSPEED_FIELD, 3);
                        if (stv090x_write_reg(state, STV090x_P2_TSCFGM, reg) < 0)
                              goto err;
                        if (stv090x_write_reg(state, STV090x_P1_TSSPEED, 0x14) < 0)
                              goto err;
                        if (stv090x_write_reg(state, STV090x_P2_TSSPEED, 0x28) < 0)
                              goto err;
                        break;
                  }
                  break;

            case STV090x_TSMODE_SERIAL_PUNCTURED:
            case STV090x_TSMODE_SERIAL_CONTINUOUS:
            default:
                  switch (state->config->ts2_mode) {
                  case STV090x_TSMODE_SERIAL_PUNCTURED:
                  case STV090x_TSMODE_SERIAL_CONTINUOUS:
                  default:
                        if (stv090x_write_reg(state, STV090x_TSGENERAL, 0x0c) < 0)
                              goto err;
                        break;

                  case STV090x_TSMODE_PARALLEL_PUNCTURED:
                  case STV090x_TSMODE_DVBCI:
                        if (stv090x_write_reg(state, STV090x_TSGENERAL, 0x0a) < 0)
                              goto err;
                        break;
                  }
                  break;
            }
      } else {
            switch (state->config->ts1_mode) {
            case STV090x_TSMODE_PARALLEL_PUNCTURED:
            case STV090x_TSMODE_DVBCI:
                  switch (state->config->ts2_mode) {
                  case STV090x_TSMODE_SERIAL_PUNCTURED:
                  case STV090x_TSMODE_SERIAL_CONTINUOUS:
                  default:
                        stv090x_write_reg(state, STV090x_TSGENERAL1X, 0x10);
                        break;

                  case STV090x_TSMODE_PARALLEL_PUNCTURED:
                  case STV090x_TSMODE_DVBCI:
                        stv090x_write_reg(state, STV090x_TSGENERAL1X, 0x16);
                        reg = stv090x_read_reg(state, STV090x_P1_TSCFGM);
                        STV090x_SETFIELD_Px(reg, TSFIFO_MANSPEED_FIELD, 3);
                        if (stv090x_write_reg(state, STV090x_P1_TSCFGM, reg) < 0)
                              goto err;
                        reg = stv090x_read_reg(state, STV090x_P1_TSCFGM);
                        STV090x_SETFIELD_Px(reg, TSFIFO_MANSPEED_FIELD, 0);
                        if (stv090x_write_reg(state, STV090x_P1_TSCFGM, reg) < 0)
                              goto err;
                        if (stv090x_write_reg(state, STV090x_P1_TSSPEED, 0x14) < 0)
                              goto err;
                        if (stv090x_write_reg(state, STV090x_P2_TSSPEED, 0x28) < 0)
                              goto err;
                        break;
                  }
                  break;

            case STV090x_TSMODE_SERIAL_PUNCTURED:
            case STV090x_TSMODE_SERIAL_CONTINUOUS:
            default:
                  switch (state->config->ts2_mode) {
                  case STV090x_TSMODE_SERIAL_PUNCTURED:
                  case STV090x_TSMODE_SERIAL_CONTINUOUS:
                  default:
                        stv090x_write_reg(state, STV090x_TSGENERAL1X, 0x14);
                        break;

                  case STV090x_TSMODE_PARALLEL_PUNCTURED:
                  case STV090x_TSMODE_DVBCI:
                        stv090x_write_reg(state, STV090x_TSGENERAL1X, 0x12);
                        break;
                  }
                  break;
            }
      }

      switch (state->config->ts1_mode) {
      case STV090x_TSMODE_PARALLEL_PUNCTURED:
            reg = stv090x_read_reg(state, STV090x_P1_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x00);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x00);
            if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_DVBCI:
            reg = stv090x_read_reg(state, STV090x_P1_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x00);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x01);
            if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_SERIAL_PUNCTURED:
            reg = stv090x_read_reg(state, STV090x_P1_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x01);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x00);
            if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_SERIAL_CONTINUOUS:
            reg = stv090x_read_reg(state, STV090x_P1_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x01);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x01);
            if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
                  goto err;
            break;

      default:
            break;
      }

      switch (state->config->ts2_mode) {
      case STV090x_TSMODE_PARALLEL_PUNCTURED:
            reg = stv090x_read_reg(state, STV090x_P2_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x00);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x00);
            if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_DVBCI:
            reg = stv090x_read_reg(state, STV090x_P2_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x00);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x01);
            if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_SERIAL_PUNCTURED:
            reg = stv090x_read_reg(state, STV090x_P2_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x01);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x00);
            if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
                  goto err;
            break;

      case STV090x_TSMODE_SERIAL_CONTINUOUS:
            reg = stv090x_read_reg(state, STV090x_P2_TSCFGH);
            STV090x_SETFIELD_Px(reg, TSFIFO_SERIAL_FIELD, 0x01);
            STV090x_SETFIELD_Px(reg, TSFIFO_DVBCI_FIELD, 0x01);
            if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
                  goto err;
            break;

      default:
            break;
      }
      reg = stv090x_read_reg(state, STV090x_P2_TSCFGH);
      STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0x01);
      if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
            goto err;
      STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0x00);
      if (stv090x_write_reg(state, STV090x_P2_TSCFGH, reg) < 0)
            goto err;

      reg = stv090x_read_reg(state, STV090x_P1_TSCFGH);
      STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0x01);
      if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
            goto err;
      STV090x_SETFIELD_Px(reg, RST_HWARE_FIELD, 0x00);
      if (stv090x_write_reg(state, STV090x_P1_TSCFGH, reg) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_init(struct dvb_frontend *fe)
{
      struct stv090x_state *state = fe->demodulator_priv;
      const struct stv090x_config *config = state->config;
      u32 reg;

      if (stv090x_wakeup(fe) < 0) {
            dprintk(FE_ERROR, 1, "Error waking device");
            goto err;
      }

      if (stv090x_ldpc_mode(state, state->demod_mode) < 0)
            goto err;

      reg = STV090x_READ_DEMOD(state, TNRCFG2);
      STV090x_SETFIELD_Px(reg, TUN_IQSWAP_FIELD, state->inversion);
      if (STV090x_WRITE_DEMOD(state, TNRCFG2, reg) < 0)
            goto err;
      reg = STV090x_READ_DEMOD(state, DEMOD);
      STV090x_SETFIELD_Px(reg, ROLLOFF_CONTROL_FIELD, state->rolloff);
      if (STV090x_WRITE_DEMOD(state, DEMOD, reg) < 0)
            goto err;

      if (stv090x_i2c_gate_ctrl(fe, 1) < 0)
            goto err;

      if (config->tuner_set_mode) {
            if (config->tuner_set_mode(fe, TUNER_WAKE) < 0)
                  goto err;
      }

      if (config->tuner_init) {
            if (config->tuner_init(fe) < 0)
                  goto err;
      }

      if (stv090x_i2c_gate_ctrl(fe, 0) < 0)
            goto err;

      if (stv090x_set_tspath(state) < 0)
            goto err;

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static int stv090x_setup(struct dvb_frontend *fe)
{
      struct stv090x_state *state = fe->demodulator_priv;
      const struct stv090x_config *config = state->config;
      const struct stv090x_reg *stv090x_initval = NULL;
      const struct stv090x_reg *stv090x_cut20_val = NULL;
      unsigned long t1_size = 0, t2_size = 0;
      u32 reg = 0;

      int i;

      if (state->device == STV0900) {
            dprintk(FE_DEBUG, 1, "Initializing STV0900");
            stv090x_initval = stv0900_initval;
            t1_size = ARRAY_SIZE(stv0900_initval);
            stv090x_cut20_val = stv0900_cut20_val;
            t2_size = ARRAY_SIZE(stv0900_cut20_val);
      } else if (state->device == STV0903) {
            dprintk(FE_DEBUG, 1, "Initializing STV0903");
            stv090x_initval = stv0903_initval;
            t1_size = ARRAY_SIZE(stv0903_initval);
            stv090x_cut20_val = stv0903_cut20_val;
            t2_size = ARRAY_SIZE(stv0903_cut20_val);
      }

      /* STV090x init */
      if (STV090x_WRITE_DEMOD(state, DMDISTATE, 0x5c) < 0) /* Stop Demod */
            goto err;

      msleep(5);

      if (STV090x_WRITE_DEMOD(state, TNRCFG, 0x6c) < 0) /* check register ! (No Tuner Mode) */
            goto err;

      STV090x_SETFIELD_Px(reg, ENARPT_LEVEL_FIELD, config->repeater_level);
      if (STV090x_WRITE_DEMOD(state, I2CRPT, reg) < 0) /* repeater OFF */
            goto err;

      if (stv090x_write_reg(state, STV090x_NCOARSE, 0x13) < 0) /* set PLL divider */
            goto err;
      msleep(5);
      if (stv090x_write_reg(state, STV090x_I2CCFG, 0x08) < 0) /* 1/41 oversampling */
            goto err;
      if (stv090x_write_reg(state, STV090x_SYNTCTRL, 0x20 | config->clk_mode) < 0) /* enable PLL */
            goto err;
      msleep(5);

      /* write initval */
      dprintk(FE_DEBUG, 1, "Setting up initial values");
      for (i = 0; i < t1_size; i++) {
            if (stv090x_write_reg(state, stv090x_initval[i].addr, stv090x_initval[i].data) < 0)
                  goto err;
      }

      state->dev_ver = stv090x_read_reg(state, STV090x_MID);
      if (state->dev_ver >= 0x20) {
            if (stv090x_write_reg(state, STV090x_TSGENERAL, 0x0c) < 0)
                  goto err;

            /* write cut20_val*/
            dprintk(FE_DEBUG, 1, "Setting up Cut 2.0 initial values");
            for (i = 0; i < t2_size; i++) {
                  if (stv090x_write_reg(state, stv090x_cut20_val[i].addr, stv090x_cut20_val[i].data) < 0)
                        goto err;
            }

      } else if (state->dev_ver < 0x20) {
            dprintk(FE_ERROR, 1, "ERROR: Unsupported Cut: 0x%02x!",
                  state->dev_ver);

            goto err;
      } else if (state->dev_ver > 0x30) {
            /* we shouldn't bail out from here */
            dprintk(FE_ERROR, 1, "INFO: Cut: 0x%02x probably incomplete support!",
                  state->dev_ver);
      }

      if (stv090x_write_reg(state, STV090x_TSTRES0, 0x80) < 0)
            goto err;
      if (stv090x_write_reg(state, STV090x_TSTRES0, 0x00) < 0)
            goto err;

      stv090x_set_mclk(state, 135000000, config->xtal); /* 135 Mhz */
      msleep(5);
      if (stv090x_write_reg(state, STV090x_SYNTCTRL, 0x20 | config->clk_mode) < 0)
            goto err;
      stv090x_get_mclk(state);

      return 0;
err:
      dprintk(FE_ERROR, 1, "I/O error");
      return -1;
}

static struct dvb_frontend_ops stv090x_ops = {

      .info = {
            .name             = "STV090x Multistandard",
            .type             = FE_QPSK,
            .frequency_min          = 950000,
            .frequency_max          = 2150000,
            .frequency_stepsize     = 0,
            .frequency_tolerance    = 0,
            .symbol_rate_min  = 1000000,
            .symbol_rate_max  = 45000000,
            .caps             = FE_CAN_INVERSION_AUTO |
                                FE_CAN_FEC_AUTO       |
                                FE_CAN_QPSK           |
                                FE_CAN_2G_MODULATION
      },

      .release                = stv090x_release,
      .init                   = stv090x_init,

      .sleep                        = stv090x_sleep,
      .get_frontend_algo            = stv090x_frontend_algo,

      .i2c_gate_ctrl                = stv090x_i2c_gate_ctrl,

      .diseqc_send_master_cmd       = stv090x_send_diseqc_msg,
      .diseqc_send_burst            = stv090x_send_diseqc_burst,
      .diseqc_recv_slave_reply      = stv090x_recv_slave_reply,
      .set_tone               = stv090x_set_tone,

      .search                       = stv090x_search,
      .read_status                  = stv090x_read_status,
      .read_ber               = stv090x_read_per,
      .read_signal_strength         = stv090x_read_signal_strength,
      .read_snr               = stv090x_read_cnr
};


struct dvb_frontend *stv090x_attach(const struct stv090x_config *config,
                            struct i2c_adapter *i2c,
                            enum stv090x_demodulator demod)
{
      struct stv090x_state *state = NULL;

      state = kzalloc(sizeof (struct stv090x_state), GFP_KERNEL);
      if (state == NULL)
            goto error;

      state->verbose                      = &verbose;
      state->config                       = config;
      state->i2c                    = i2c;
      state->frontend.ops                 = stv090x_ops;
      state->frontend.demodulator_priv    = state;
      state->demod                        = demod;
      state->demod_mode                   = config->demod_mode; /* Single or Dual mode */
      state->device                       = config->device;
      state->rolloff                      = STV090x_RO_35; /* default */

      if (state->demod == STV090x_DEMODULATOR_0)
            mutex_init(&demod_lock);

      if (stv090x_sleep(&state->frontend) < 0) {
            dprintk(FE_ERROR, 1, "Error putting device to sleep");
            goto error;
      }

      if (stv090x_setup(&state->frontend) < 0) {
            dprintk(FE_ERROR, 1, "Error setting up device");
            goto error;
      }
      if (stv090x_wakeup(&state->frontend) < 0) {
            dprintk(FE_ERROR, 1, "Error waking device");
            goto error;
      }

      dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x\n",
             state->device == STV0900 ? "STV0900" : "STV0903",
             demod,
             state->dev_ver);

      return &state->frontend;

error:
      kfree(state);
      return NULL;
}
EXPORT_SYMBOL(stv090x_attach);
MODULE_PARM_DESC(verbose, "Set Verbosity level");
MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("STV090x Multi-Std Broadcast frontend");
MODULE_LICENSE("GPL");

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