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af9005-fe.c

/* Frontend part of the Linux driver for the Afatech 9005
 * USB1.1 DVB-T receiver.
 *
 * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
 *
 * Thanks to Afatech who kindly provided information.
 *
 * 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.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include "af9005.h"
#include "af9005-script.h"
#include "mt2060.h"
#include "qt1010.h"
#include <asm/div64.h>

struct af9005_fe_state {
      struct dvb_usb_device *d;
      fe_status_t stat;

      /* retraining parameters */
      u32 original_fcw;
      u16 original_rf_top;
      u16 original_if_top;
      u16 original_if_min;
      u16 original_aci0_if_top;
      u16 original_aci1_if_top;
      u16 original_aci0_if_min;
      u8 original_if_unplug_th;
      u8 original_rf_unplug_th;
      u8 original_dtop_if_unplug_th;
      u8 original_dtop_rf_unplug_th;

      /* statistics */
      u32 pre_vit_error_count;
      u32 pre_vit_bit_count;
      u32 ber;
      u32 post_vit_error_count;
      u32 post_vit_bit_count;
      u32 unc;
      u16 abort_count;

      int opened;
      int strong;
      unsigned long next_status_check;
      struct dvb_frontend frontend;
};

static int af9005_write_word_agc(struct dvb_usb_device *d, u16 reghi,
                         u16 reglo, u8 pos, u8 len, u16 value)
{
      int ret;
      u8 temp;

      if ((ret = af9005_write_ofdm_register(d, reglo, (u8) (value & 0xff))))
            return ret;
      temp = (u8) ((value & 0x0300) >> 8);
      return af9005_write_register_bits(d, reghi, pos, len,
                                (u8) ((value & 0x300) >> 8));
}

static int af9005_read_word_agc(struct dvb_usb_device *d, u16 reghi,
                        u16 reglo, u8 pos, u8 len, u16 * value)
{
      int ret;
      u8 temp0, temp1;

      if ((ret = af9005_read_ofdm_register(d, reglo, &temp0)))
            return ret;
      if ((ret = af9005_read_ofdm_register(d, reghi, &temp1)))
            return ret;
      switch (pos) {
      case 0:
            *value = ((u16) (temp1 & 0x03) << 8) + (u16) temp0;
            break;
      case 2:
            *value = ((u16) (temp1 & 0x0C) << 6) + (u16) temp0;
            break;
      case 4:
            *value = ((u16) (temp1 & 0x30) << 4) + (u16) temp0;
            break;
      case 6:
            *value = ((u16) (temp1 & 0xC0) << 2) + (u16) temp0;
            break;
      default:
            err("invalid pos in read word agc");
            return -EINVAL;
      }
      return 0;

}

static int af9005_is_fecmon_available(struct dvb_frontend *fe, int *available)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;
      u8 temp;

      *available = false;

      ret = af9005_read_register_bits(state->d, xd_p_fec_vtb_rsd_mon_en,
                              fec_vtb_rsd_mon_en_pos,
                              fec_vtb_rsd_mon_en_len, &temp);
      if (ret)
            return ret;
      if (temp & 1) {
            ret =
                af9005_read_register_bits(state->d,
                                    xd_p_reg_ofsm_read_rbc_en,
                                    reg_ofsm_read_rbc_en_pos,
                                    reg_ofsm_read_rbc_en_len, &temp);
            if (ret)
                  return ret;
            if ((temp & 1) == 0)
                  *available = true;

      }
      return 0;
}

static int af9005_get_post_vit_err_cw_count(struct dvb_frontend *fe,
                                  u32 * post_err_count,
                                  u32 * post_cw_count,
                                  u16 * abort_count)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;
      u32 err_count;
      u32 cw_count;
      u8 temp, temp0, temp1, temp2;
      u16 loc_abort_count;

      *post_err_count = 0;
      *post_cw_count = 0;

      /* check if error bit count is ready */
      ret =
          af9005_read_register_bits(state->d, xd_r_fec_rsd_ber_rdy,
                              fec_rsd_ber_rdy_pos, fec_rsd_ber_rdy_len,
                              &temp);
      if (ret)
            return ret;
      if (!temp) {
            deb_info("rsd counter not ready\n");
            return 100;
      }
      /* get abort count */
      ret =
          af9005_read_ofdm_register(state->d,
                              xd_r_fec_rsd_abort_packet_cnt_7_0,
                              &temp0);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d,
                              xd_r_fec_rsd_abort_packet_cnt_15_8,
                              &temp1);
      if (ret)
            return ret;
      loc_abort_count = ((u16) temp1 << 8) + temp0;

      /* get error count */
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_rsd_bit_err_cnt_7_0,
                              &temp0);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_rsd_bit_err_cnt_15_8,
                              &temp1);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_rsd_bit_err_cnt_23_16,
                              &temp2);
      if (ret)
            return ret;
      err_count = ((u32) temp2 << 16) + ((u32) temp1 << 8) + temp0;
      *post_err_count = err_count - (u32) loc_abort_count *8 * 8;

      /* get RSD packet number */
      ret =
          af9005_read_ofdm_register(state->d, xd_p_fec_rsd_packet_unit_7_0,
                              &temp0);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_p_fec_rsd_packet_unit_15_8,
                              &temp1);
      if (ret)
            return ret;
      cw_count = ((u32) temp1 << 8) + temp0;
      if (cw_count == 0) {
            err("wrong RSD packet count");
            return -EIO;
      }
      deb_info("POST abort count %d err count %d rsd packets %d\n",
             loc_abort_count, err_count, cw_count);
      *post_cw_count = cw_count - (u32) loc_abort_count;
      *abort_count = loc_abort_count;
      return 0;

}

static int af9005_get_post_vit_ber(struct dvb_frontend *fe,
                           u32 * post_err_count, u32 * post_cw_count,
                           u16 * abort_count)
{
      u32 loc_cw_count = 0, loc_err_count;
      u16 loc_abort_count;
      int ret;

      ret =
          af9005_get_post_vit_err_cw_count(fe, &loc_err_count, &loc_cw_count,
                                   &loc_abort_count);
      if (ret)
            return ret;
      *post_err_count = loc_err_count;
      *post_cw_count = loc_cw_count * 204 * 8;
      *abort_count = loc_abort_count;

      return 0;
}

static int af9005_get_pre_vit_err_bit_count(struct dvb_frontend *fe,
                                  u32 * pre_err_count,
                                  u32 * pre_bit_count)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      u8 temp, temp0, temp1, temp2;
      u32 super_frame_count, x, bits;
      int ret;

      ret =
          af9005_read_register_bits(state->d, xd_r_fec_vtb_ber_rdy,
                              fec_vtb_ber_rdy_pos, fec_vtb_ber_rdy_len,
                              &temp);
      if (ret)
            return ret;
      if (!temp) {
            deb_info("viterbi counter not ready\n");
            return 101; /* ERR_APO_VTB_COUNTER_NOT_READY; */
      }
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_vtb_err_bit_cnt_7_0,
                              &temp0);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_vtb_err_bit_cnt_15_8,
                              &temp1);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_fec_vtb_err_bit_cnt_23_16,
                              &temp2);
      if (ret)
            return ret;
      *pre_err_count = ((u32) temp2 << 16) + ((u32) temp1 << 8) + temp0;

      ret =
          af9005_read_ofdm_register(state->d, xd_p_fec_super_frm_unit_7_0,
                              &temp0);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_p_fec_super_frm_unit_15_8,
                              &temp1);
      if (ret)
            return ret;
      super_frame_count = ((u32) temp1 << 8) + temp0;
      if (super_frame_count == 0) {
            deb_info("super frame count 0\n");
            return 102;
      }

      /* read fft mode */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_txmod,
                              reg_tpsd_txmod_pos, reg_tpsd_txmod_len,
                              &temp);
      if (ret)
            return ret;
      if (temp == 0) {
            /* 2K */
            x = 1512;
      } else if (temp == 1) {
            /* 8k */
            x = 6048;
      } else {
            err("Invalid fft mode");
            return -EINVAL;
      }

      /* read constellation mode */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_const,
                              reg_tpsd_const_pos, reg_tpsd_const_len,
                              &temp);
      if (ret)
            return ret;
      switch (temp) {
      case 0:           /* QPSK */
            bits = 2;
            break;
      case 1:           /* QAM_16 */
            bits = 4;
            break;
      case 2:           /* QAM_64 */
            bits = 6;
            break;
      default:
            err("invalid constellation mode");
            return -EINVAL;
      }
      *pre_bit_count = super_frame_count * 68 * 4 * x * bits;
      deb_info("PRE err count %d frame count %d bit count %d\n",
             *pre_err_count, super_frame_count, *pre_bit_count);
      return 0;
}

static int af9005_reset_pre_viterbi(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;

      /* set super frame count to 1 */
      ret =
          af9005_write_ofdm_register(state->d, xd_p_fec_super_frm_unit_7_0,
                               1 & 0xff);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, xd_p_fec_super_frm_unit_15_8,
                               1 >> 8);
      if (ret)
            return ret;
      /* reset pre viterbi error count */
      ret =
          af9005_write_register_bits(state->d, xd_p_fec_vtb_ber_rst,
                               fec_vtb_ber_rst_pos, fec_vtb_ber_rst_len,
                               1);

      return ret;
}

static int af9005_reset_post_viterbi(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;

      /* set packet unit */
      ret =
          af9005_write_ofdm_register(state->d, xd_p_fec_rsd_packet_unit_7_0,
                               10000 & 0xff);
      if (ret)
            return ret;
      ret =
          af9005_write_ofdm_register(state->d, xd_p_fec_rsd_packet_unit_15_8,
                               10000 >> 8);
      if (ret)
            return ret;
      /* reset post viterbi error count */
      ret =
          af9005_write_register_bits(state->d, xd_p_fec_rsd_ber_rst,
                               fec_rsd_ber_rst_pos, fec_rsd_ber_rst_len,
                               1);

      return ret;
}

static int af9005_get_statistic(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret, fecavailable;
      u64 numerator, denominator;

      deb_info("GET STATISTIC\n");
      ret = af9005_is_fecmon_available(fe, &fecavailable);
      if (ret)
            return ret;
      if (!fecavailable) {
            deb_info("fecmon not available\n");
            return 0;
      }

      ret = af9005_get_pre_vit_err_bit_count(fe, &state->pre_vit_error_count,
                                     &state->pre_vit_bit_count);
      if (ret == 0) {
            af9005_reset_pre_viterbi(fe);
            if (state->pre_vit_bit_count > 0) {
                  /* according to v 0.0.4 of the dvb api ber should be a multiple
                     of 10E-9 so we have to multiply the error count by
                     10E9=1000000000 */
                  numerator =
                      (u64) state->pre_vit_error_count * (u64) 1000000000;
                  denominator = (u64) state->pre_vit_bit_count;
                  state->ber = do_div(numerator, denominator);
            } else {
                  state->ber = 0xffffffff;
            }
      }

      ret = af9005_get_post_vit_ber(fe, &state->post_vit_error_count,
                              &state->post_vit_bit_count,
                              &state->abort_count);
      if (ret == 0) {
            ret = af9005_reset_post_viterbi(fe);
            state->unc += state->abort_count;
            if (ret)
                  return ret;
      }
      return 0;
}

static int af9005_fe_refresh_state(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      if (time_after(jiffies, state->next_status_check)) {
            deb_info("REFRESH STATE\n");

            /* statistics */
            if (af9005_get_statistic(fe))
                  err("get_statistic_failed");
            state->next_status_check = jiffies + 250 * HZ / 1000;
      }
      return 0;
}

static int af9005_fe_read_status(struct dvb_frontend *fe, fe_status_t * stat)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      u8 temp;
      int ret;

      if (fe->ops.tuner_ops.release == NULL)
            return -ENODEV;

      *stat = 0;
      ret = af9005_read_register_bits(state->d, xd_p_agc_lock,
                              agc_lock_pos, agc_lock_len, &temp);
      if (ret)
            return ret;
      if (temp)
            *stat |= FE_HAS_SIGNAL;

      ret = af9005_read_register_bits(state->d, xd_p_fd_tpsd_lock,
                              fd_tpsd_lock_pos, fd_tpsd_lock_len,
                              &temp);
      if (ret)
            return ret;
      if (temp)
            *stat |= FE_HAS_CARRIER;

      ret = af9005_read_register_bits(state->d,
                              xd_r_mp2if_sync_byte_locked,
                              mp2if_sync_byte_locked_pos,
                              mp2if_sync_byte_locked_pos, &temp);
      if (ret)
            return ret;
      if (temp)
            *stat |= FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_LOCK;
      if (state->opened)
            af9005_led_control(state->d, *stat & FE_HAS_LOCK);

      ret =
          af9005_read_register_bits(state->d, xd_p_reg_strong_sginal_detected,
                              reg_strong_sginal_detected_pos,
                              reg_strong_sginal_detected_len, &temp);
      if (ret)
            return ret;
      if (temp != state->strong) {
            deb_info("adjust for strong signal %d\n", temp);
                  state->strong = temp;
      }
      return 0;
}

static int af9005_fe_read_ber(struct dvb_frontend *fe, u32 * ber)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      if (fe->ops.tuner_ops.release  == NULL)
            return -ENODEV;
      af9005_fe_refresh_state(fe);
      *ber = state->ber;
      return 0;
}

static int af9005_fe_read_unc_blocks(struct dvb_frontend *fe, u32 * unc)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      if (fe->ops.tuner_ops.release == NULL)
            return -ENODEV;
      af9005_fe_refresh_state(fe);
      *unc = state->unc;
      return 0;
}

static int af9005_fe_read_signal_strength(struct dvb_frontend *fe,
                                u16 * strength)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;
      u8 if_gain, rf_gain;

      if (fe->ops.tuner_ops.release == NULL)
            return -ENODEV;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_reg_aagc_rf_gain,
                              &rf_gain);
      if (ret)
            return ret;
      ret =
          af9005_read_ofdm_register(state->d, xd_r_reg_aagc_if_gain,
                              &if_gain);
      if (ret)
            return ret;
      /* this value has no real meaning, but i don't have the tables that relate
         the rf and if gain with the dbm, so I just scale the value */
      *strength = (512 - rf_gain - if_gain) << 7;
      return 0;
}

static int af9005_fe_read_snr(struct dvb_frontend *fe, u16 * snr)
{
      /* the snr can be derived from the ber and the constellation
         but I don't think this kind of complex calculations belong
         in the driver. I may be wrong.... */
      return -ENOSYS;
}

static int af9005_fe_program_cfoe(struct dvb_usb_device *d, fe_bandwidth_t bw)
{
      u8 temp0, temp1, temp2, temp3, buf[4];
      int ret;
      u32 NS_coeff1_2048Nu;
      u32 NS_coeff1_8191Nu;
      u32 NS_coeff1_8192Nu;
      u32 NS_coeff1_8193Nu;
      u32 NS_coeff2_2k;
      u32 NS_coeff2_8k;

      switch (bw) {
      case BANDWIDTH_6_MHZ:
            NS_coeff1_2048Nu = 0x2ADB6DC;
            NS_coeff1_8191Nu = 0xAB7313;
            NS_coeff1_8192Nu = 0xAB6DB7;
            NS_coeff1_8193Nu = 0xAB685C;
            NS_coeff2_2k = 0x156DB6E;
            NS_coeff2_8k = 0x55B6DC;
            break;

      case BANDWIDTH_7_MHZ:
            NS_coeff1_2048Nu = 0x3200001;
            NS_coeff1_8191Nu = 0xC80640;
            NS_coeff1_8192Nu = 0xC80000;
            NS_coeff1_8193Nu = 0xC7F9C0;
            NS_coeff2_2k = 0x1900000;
            NS_coeff2_8k = 0x640000;
            break;

      case BANDWIDTH_8_MHZ:
            NS_coeff1_2048Nu = 0x3924926;
            NS_coeff1_8191Nu = 0xE4996E;
            NS_coeff1_8192Nu = 0xE49249;
            NS_coeff1_8193Nu = 0xE48B25;
            NS_coeff2_2k = 0x1C92493;
            NS_coeff2_8k = 0x724925;
            break;
      default:
            err("Invalid bandwith %d.", bw);
            return -EINVAL;
      }

      /*
       *  write NS_coeff1_2048Nu
       */

      temp0 = (u8) (NS_coeff1_2048Nu & 0x000000FF);
      temp1 = (u8) ((NS_coeff1_2048Nu & 0x0000FF00) >> 8);
      temp2 = (u8) ((NS_coeff1_2048Nu & 0x00FF0000) >> 16);
      temp3 = (u8) ((NS_coeff1_2048Nu & 0x03000000) >> 24);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      /*  cfoe_NS_2k_coeff1_25_24 */
      ret = af9005_write_ofdm_register(d, 0xAE00, buf[0]);
      if (ret)
            return ret;

      /*  cfoe_NS_2k_coeff1_23_16 */
      ret = af9005_write_ofdm_register(d, 0xAE01, buf[1]);
      if (ret)
            return ret;

      /*  cfoe_NS_2k_coeff1_15_8 */
      ret = af9005_write_ofdm_register(d, 0xAE02, buf[2]);
      if (ret)
            return ret;

      /*  cfoe_NS_2k_coeff1_7_0 */
      ret = af9005_write_ofdm_register(d, 0xAE03, buf[3]);
      if (ret)
            return ret;

      /*
       *  write NS_coeff2_2k
       */

      temp0 = (u8) ((NS_coeff2_2k & 0x0000003F));
      temp1 = (u8) ((NS_coeff2_2k & 0x00003FC0) >> 6);
      temp2 = (u8) ((NS_coeff2_2k & 0x003FC000) >> 14);
      temp3 = (u8) ((NS_coeff2_2k & 0x01C00000) >> 22);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      ret = af9005_write_ofdm_register(d, 0xAE04, buf[0]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE05, buf[1]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE06, buf[2]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE07, buf[3]);
      if (ret)
            return ret;

      /*
       *  write NS_coeff1_8191Nu
       */

      temp0 = (u8) ((NS_coeff1_8191Nu & 0x000000FF));
      temp1 = (u8) ((NS_coeff1_8191Nu & 0x0000FF00) >> 8);
      temp2 = (u8) ((NS_coeff1_8191Nu & 0x00FFC000) >> 16);
      temp3 = (u8) ((NS_coeff1_8191Nu & 0x03000000) >> 24);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      ret = af9005_write_ofdm_register(d, 0xAE08, buf[0]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE09, buf[1]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE0A, buf[2]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE0B, buf[3]);
      if (ret)
            return ret;

      /*
       *  write NS_coeff1_8192Nu
       */

      temp0 = (u8) (NS_coeff1_8192Nu & 0x000000FF);
      temp1 = (u8) ((NS_coeff1_8192Nu & 0x0000FF00) >> 8);
      temp2 = (u8) ((NS_coeff1_8192Nu & 0x00FFC000) >> 16);
      temp3 = (u8) ((NS_coeff1_8192Nu & 0x03000000) >> 24);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      ret = af9005_write_ofdm_register(d, 0xAE0C, buf[0]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE0D, buf[1]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE0E, buf[2]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE0F, buf[3]);
      if (ret)
            return ret;

      /*
       *  write NS_coeff1_8193Nu
       */

      temp0 = (u8) ((NS_coeff1_8193Nu & 0x000000FF));
      temp1 = (u8) ((NS_coeff1_8193Nu & 0x0000FF00) >> 8);
      temp2 = (u8) ((NS_coeff1_8193Nu & 0x00FFC000) >> 16);
      temp3 = (u8) ((NS_coeff1_8193Nu & 0x03000000) >> 24);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      ret = af9005_write_ofdm_register(d, 0xAE10, buf[0]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE11, buf[1]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE12, buf[2]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE13, buf[3]);
      if (ret)
            return ret;

      /*
       *  write NS_coeff2_8k
       */

      temp0 = (u8) ((NS_coeff2_8k & 0x0000003F));
      temp1 = (u8) ((NS_coeff2_8k & 0x00003FC0) >> 6);
      temp2 = (u8) ((NS_coeff2_8k & 0x003FC000) >> 14);
      temp3 = (u8) ((NS_coeff2_8k & 0x01C00000) >> 22);

      /*  big endian to make 8051 happy */
      buf[0] = temp3;
      buf[1] = temp2;
      buf[2] = temp1;
      buf[3] = temp0;

      ret = af9005_write_ofdm_register(d, 0xAE14, buf[0]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE15, buf[1]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE16, buf[2]);
      if (ret)
            return ret;

      ret = af9005_write_ofdm_register(d, 0xAE17, buf[3]);
      return ret;

}

static int af9005_fe_select_bw(struct dvb_usb_device *d, fe_bandwidth_t bw)
{
      u8 temp;
      switch (bw) {
      case BANDWIDTH_6_MHZ:
            temp = 0;
            break;
      case BANDWIDTH_7_MHZ:
            temp = 1;
            break;
      case BANDWIDTH_8_MHZ:
            temp = 2;
            break;
      default:
            err("Invalid bandwith %d.", bw);
            return -EINVAL;
      }
      return af9005_write_register_bits(d, xd_g_reg_bw, reg_bw_pos,
                                reg_bw_len, temp);
}

static int af9005_fe_power(struct dvb_frontend *fe, int on)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      u8 temp = on;
      int ret;
      deb_info("power %s tuner\n", on ? "on" : "off");
      ret = af9005_send_command(state->d, 0x03, &temp, 1, NULL, 0);
      return ret;
}

static struct mt2060_config af9005_mt2060_config = {
      0xC0
};

static struct qt1010_config af9005_qt1010_config = {
      0xC4
};

static int af9005_fe_init(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      struct dvb_usb_adapter *adap = fe->dvb->priv;
      int ret, i, scriptlen;
      u8 temp, temp0 = 0, temp1 = 0, temp2 = 0;
      u8 buf[2];
      u16 if1;

      deb_info("in af9005_fe_init\n");

      /* reset */
      deb_info("reset\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_I2C_reg_ofdm_rst_en,
                              4, 1, 0x01)))
            return ret;
      if ((ret = af9005_write_ofdm_register(state->d, APO_REG_RESET, 0)))
            return ret;
      /* clear ofdm reset */
      deb_info("clear ofdm reset\n");
      for (i = 0; i < 150; i++) {
            if ((ret =
                 af9005_read_ofdm_register(state->d,
                                     xd_I2C_reg_ofdm_rst, &temp)))
                  return ret;
            if (temp & (regmask[reg_ofdm_rst_len - 1] << reg_ofdm_rst_pos))
                  break;
            msleep(10);
      }
      if (i == 150)
            return -ETIMEDOUT;

      /*FIXME in the dump
         write B200 A9
         write xd_g_reg_ofsm_clk 7
         read eepr c6 (2)
         read eepr c7 (2)
         misc ctrl 3 -> 1
         read eepr ca (6)
         write xd_g_reg_ofsm_clk 0
         write B200 a1
       */
      ret = af9005_write_ofdm_register(state->d, 0xb200, 0xa9);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, xd_g_reg_ofsm_clk, 0x07);
      if (ret)
            return ret;
      temp = 0x01;
      ret = af9005_send_command(state->d, 0x03, &temp, 1, NULL, 0);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, xd_g_reg_ofsm_clk, 0x00);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, 0xb200, 0xa1);
      if (ret)
            return ret;

      temp = regmask[reg_ofdm_rst_len - 1] << reg_ofdm_rst_pos;
      if ((ret =
           af9005_write_register_bits(state->d, xd_I2C_reg_ofdm_rst,
                              reg_ofdm_rst_pos, reg_ofdm_rst_len, 1)))
            return ret;
      ret = af9005_write_register_bits(state->d, xd_I2C_reg_ofdm_rst,
                               reg_ofdm_rst_pos, reg_ofdm_rst_len, 0);

      if (ret)
            return ret;
      /* don't know what register aefc is, but this is what the windows driver does */
      ret = af9005_write_ofdm_register(state->d, 0xaefc, 0);
      if (ret)
            return ret;

      /* set stand alone chip */
      deb_info("set stand alone chip\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_dca_stand_alone,
                              reg_dca_stand_alone_pos,
                              reg_dca_stand_alone_len, 1)))
            return ret;

      /* set dca upper & lower chip */
      deb_info("set dca upper & lower chip\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_dca_upper_chip,
                              reg_dca_upper_chip_pos,
                              reg_dca_upper_chip_len, 0)))
            return ret;
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_dca_lower_chip,
                              reg_dca_lower_chip_pos,
                              reg_dca_lower_chip_len, 0)))
            return ret;

      /* set 2wire master clock to 0x14 (for 60KHz) */
      deb_info("set 2wire master clock to 0x14 (for 60KHz)\n");
      if ((ret =
           af9005_write_ofdm_register(state->d, xd_I2C_i2c_m_period, 0x14)))
            return ret;

      /* clear dca enable chip */
      deb_info("clear dca enable chip\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_dca_en,
                              reg_dca_en_pos, reg_dca_en_len, 0)))
            return ret;
      /* FIXME these are register bits, but I don't know which ones */
      ret = af9005_write_ofdm_register(state->d, 0xa16c, 1);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, 0xa3c1, 0);
      if (ret)
            return ret;

      /* init other parameters: program cfoe and select bandwith */
      deb_info("program cfoe\n");
      if ((ret = af9005_fe_program_cfoe(state->d, BANDWIDTH_6_MHZ)))
            return ret;
      /* set read-update bit for constellation */
      deb_info("set read-update bit for constellation\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_feq_read_update,
                              reg_feq_read_update_pos,
                              reg_feq_read_update_len, 1)))
            return ret;

      /* sample code has a set MPEG TS code here
         but sniffing reveals that it doesn't do it */

      /* set read-update bit to 1 for DCA constellation */
      deb_info("set read-update bit 1 for DCA constellation\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_reg_dca_read_update,
                              reg_dca_read_update_pos,
                              reg_dca_read_update_len, 1)))
            return ret;

      /* enable fec monitor */
      deb_info("enable fec monitor\n");
      if ((ret =
           af9005_write_register_bits(state->d, xd_p_fec_vtb_rsd_mon_en,
                              fec_vtb_rsd_mon_en_pos,
                              fec_vtb_rsd_mon_en_len, 1)))
            return ret;

      /* FIXME should be register bits, I don't know which ones */
      ret = af9005_write_ofdm_register(state->d, 0xa601, 0);

      /* set api_retrain_never_freeze */
      deb_info("set api_retrain_never_freeze\n");
      if ((ret = af9005_write_ofdm_register(state->d, 0xaefb, 0x01)))
            return ret;

      /* load init script */
      deb_info("load init script\n");
      scriptlen = sizeof(script) / sizeof(RegDesc);
      for (i = 0; i < scriptlen; i++) {
            if ((ret =
                 af9005_write_register_bits(state->d, script[i].reg,
                                    script[i].pos,
                                    script[i].len, script[i].val)))
                  return ret;
            /* save 3 bytes of original fcw */
            if (script[i].reg == 0xae18)
                  temp2 = script[i].val;
            if (script[i].reg == 0xae19)
                  temp1 = script[i].val;
            if (script[i].reg == 0xae1a)
                  temp0 = script[i].val;

            /* save original unplug threshold */
            if (script[i].reg == xd_p_reg_unplug_th)
                  state->original_if_unplug_th = script[i].val;
            if (script[i].reg == xd_p_reg_unplug_rf_gain_th)
                  state->original_rf_unplug_th = script[i].val;
            if (script[i].reg == xd_p_reg_unplug_dtop_if_gain_th)
                  state->original_dtop_if_unplug_th = script[i].val;
            if (script[i].reg == xd_p_reg_unplug_dtop_rf_gain_th)
                  state->original_dtop_rf_unplug_th = script[i].val;

      }
      state->original_fcw =
          ((u32) temp2 << 16) + ((u32) temp1 << 8) + (u32) temp0;


      /* save original TOPs */
      deb_info("save original TOPs\n");

      /*  RF TOP */
      ret =
          af9005_read_word_agc(state->d,
                         xd_p_reg_aagc_rf_top_numerator_9_8,
                         xd_p_reg_aagc_rf_top_numerator_7_0, 0, 2,
                         &state->original_rf_top);
      if (ret)
            return ret;

      /*  IF TOP */
      ret =
          af9005_read_word_agc(state->d,
                         xd_p_reg_aagc_if_top_numerator_9_8,
                         xd_p_reg_aagc_if_top_numerator_7_0, 0, 2,
                         &state->original_if_top);
      if (ret)
            return ret;

      /*  ACI 0 IF TOP */
      ret =
          af9005_read_word_agc(state->d, 0xA60E, 0xA60A, 4, 2,
                         &state->original_aci0_if_top);
      if (ret)
            return ret;

      /*  ACI 1 IF TOP */
      ret =
          af9005_read_word_agc(state->d, 0xA60E, 0xA60B, 6, 2,
                         &state->original_aci1_if_top);
      if (ret)
            return ret;

      /* attach tuner and init */
      if (fe->ops.tuner_ops.release == NULL) {
            /* read tuner and board id from eeprom */
            ret = af9005_read_eeprom(adap->dev, 0xc6, buf, 2);
            if (ret) {
                  err("Impossible to read EEPROM\n");
                  return ret;
            }
            deb_info("Tuner id %d, board id %d\n", buf[0], buf[1]);
            switch (buf[0]) {
            case 2:     /* MT2060 */
                  /* read if1 from eeprom */
                  ret = af9005_read_eeprom(adap->dev, 0xc8, buf, 2);
                  if (ret) {
                        err("Impossible to read EEPROM\n");
                        return ret;
                  }
                  if1 = (u16) (buf[0] << 8) + buf[1];
                  if (dvb_attach(mt2060_attach, fe, &adap->dev->i2c_adap,
                               &af9005_mt2060_config, if1) == NULL) {
                        deb_info("MT2060 attach failed\n");
                        return -ENODEV;
                  }
                  break;
            case 3:     /* QT1010 */
            case 9:     /* QT1010B */
                  if (dvb_attach(qt1010_attach, fe, &adap->dev->i2c_adap,
                              &af9005_qt1010_config) ==NULL) {
                        deb_info("QT1010 attach failed\n");
                        return -ENODEV;
                  }
                  break;
            default:
                  err("Unsupported tuner type %d", buf[0]);
                  return -ENODEV;
            }
            ret = fe->ops.tuner_ops.init(fe);
            if (ret)
                  return ret;
      }

      deb_info("profit!\n");
      return 0;
}

static int af9005_fe_sleep(struct dvb_frontend *fe)
{
      return af9005_fe_power(fe, 0);
}

static int af9005_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
      struct af9005_fe_state *state = fe->demodulator_priv;

      if (acquire) {
            state->opened++;
      } else {

            state->opened--;
            if (!state->opened)
                  af9005_led_control(state->d, 0);
      }
      return 0;
}

static int af9005_fe_set_frontend(struct dvb_frontend *fe,
                          struct dvb_frontend_parameters *fep)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;
      u8 temp, temp0, temp1, temp2;

      deb_info("af9005_fe_set_frontend freq %d bw %d\n", fep->frequency,
             fep->u.ofdm.bandwidth);
      if (fe->ops.tuner_ops.release == NULL) {
            err("Tuner not attached");
            return -ENODEV;
      }

      deb_info("turn off led\n");
      /* not in the log */
      ret = af9005_led_control(state->d, 0);
      if (ret)
            return ret;
      /* not sure about the bits */
      ret = af9005_write_register_bits(state->d, XD_MP2IF_MISC, 2, 1, 0);
      if (ret)
            return ret;

      /* set FCW to default value */
      deb_info("set FCW to default value\n");
      temp0 = (u8) (state->original_fcw & 0x000000ff);
      temp1 = (u8) ((state->original_fcw & 0x0000ff00) >> 8);
      temp2 = (u8) ((state->original_fcw & 0x00ff0000) >> 16);
      ret = af9005_write_ofdm_register(state->d, 0xae1a, temp0);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, 0xae19, temp1);
      if (ret)
            return ret;
      ret = af9005_write_ofdm_register(state->d, 0xae18, temp2);
      if (ret)
            return ret;

      /* restore original TOPs */
      deb_info("restore original TOPs\n");
      ret =
          af9005_write_word_agc(state->d,
                          xd_p_reg_aagc_rf_top_numerator_9_8,
                          xd_p_reg_aagc_rf_top_numerator_7_0, 0, 2,
                          state->original_rf_top);
      if (ret)
            return ret;
      ret =
          af9005_write_word_agc(state->d,
                          xd_p_reg_aagc_if_top_numerator_9_8,
                          xd_p_reg_aagc_if_top_numerator_7_0, 0, 2,
                          state->original_if_top);
      if (ret)
            return ret;
      ret =
          af9005_write_word_agc(state->d, 0xA60E, 0xA60A, 4, 2,
                          state->original_aci0_if_top);
      if (ret)
            return ret;
      ret =
          af9005_write_word_agc(state->d, 0xA60E, 0xA60B, 6, 2,
                          state->original_aci1_if_top);
      if (ret)
            return ret;

      /* select bandwith */
      deb_info("select bandwidth");
      ret = af9005_fe_select_bw(state->d, fep->u.ofdm.bandwidth);
      if (ret)
            return ret;
      ret = af9005_fe_program_cfoe(state->d, fep->u.ofdm.bandwidth);
      if (ret)
            return ret;

      /* clear easy mode flag */
      deb_info("clear easy mode flag\n");
      ret = af9005_write_ofdm_register(state->d, 0xaefd, 0);
      if (ret)
            return ret;

      /* set unplug threshold to original value */
      deb_info("set unplug threshold to original value\n");
      ret =
          af9005_write_ofdm_register(state->d, xd_p_reg_unplug_th,
                               state->original_if_unplug_th);
      if (ret)
            return ret;
      /* set tuner */
      deb_info("set tuner\n");
      ret = fe->ops.tuner_ops.set_params(fe, fep);
      if (ret)
            return ret;

      /* trigger ofsm */
      deb_info("trigger ofsm\n");
      temp = 0;
      ret = af9005_write_tuner_registers(state->d, 0xffff, &temp, 1);
      if (ret)
            return ret;

      /* clear retrain and freeze flag */
      deb_info("clear retrain and freeze flag\n");
      ret =
          af9005_write_register_bits(state->d,
                               xd_p_reg_api_retrain_request,
                               reg_api_retrain_request_pos, 2, 0);
      if (ret)
            return ret;

      /* reset pre viterbi and post viterbi registers and statistics */
      af9005_reset_pre_viterbi(fe);
      af9005_reset_post_viterbi(fe);
      state->pre_vit_error_count = 0;
      state->pre_vit_bit_count = 0;
      state->ber = 0;
      state->post_vit_error_count = 0;
      /* state->unc = 0; commented out since it should be ever increasing */
      state->abort_count = 0;

      state->next_status_check = jiffies;
      state->strong = -1;

      return 0;
}

static int af9005_fe_get_frontend(struct dvb_frontend *fe,
                          struct dvb_frontend_parameters *fep)
{
      struct af9005_fe_state *state = fe->demodulator_priv;
      int ret;
      u8 temp;

      /* mode */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_const,
                              reg_tpsd_const_pos, reg_tpsd_const_len,
                              &temp);
      if (ret)
            return ret;
      deb_info("===== fe_get_frontend ==============\n");
      deb_info("CONSTELLATION ");
      switch (temp) {
      case 0:
            fep->u.ofdm.constellation = QPSK;
            deb_info("QPSK\n");
            break;
      case 1:
            fep->u.ofdm.constellation = QAM_16;
            deb_info("QAM_16\n");
            break;
      case 2:
            fep->u.ofdm.constellation = QAM_64;
            deb_info("QAM_64\n");
            break;
      }

      /* tps hierarchy and alpha value */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_hier,
                              reg_tpsd_hier_pos, reg_tpsd_hier_len,
                              &temp);
      if (ret)
            return ret;
      deb_info("HIERARCHY ");
      switch (temp) {
      case 0:
            fep->u.ofdm.hierarchy_information = HIERARCHY_NONE;
            deb_info("NONE\n");
            break;
      case 1:
            fep->u.ofdm.hierarchy_information = HIERARCHY_1;
            deb_info("1\n");
            break;
      case 2:
            fep->u.ofdm.hierarchy_information = HIERARCHY_2;
            deb_info("2\n");
            break;
      case 3:
            fep->u.ofdm.hierarchy_information = HIERARCHY_4;
            deb_info("4\n");
            break;
      }

      /*  high/low priority     */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_dec_pri,
                              reg_dec_pri_pos, reg_dec_pri_len, &temp);
      if (ret)
            return ret;
      /* if temp is set = high priority */
      deb_info("PRIORITY %s\n", temp ? "high" : "low");

      /* high coderate */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_hpcr,
                              reg_tpsd_hpcr_pos, reg_tpsd_hpcr_len,
                              &temp);
      if (ret)
            return ret;
      deb_info("CODERATE HP ");
      switch (temp) {
      case 0:
            fep->u.ofdm.code_rate_HP = FEC_1_2;
            deb_info("FEC_1_2\n");
            break;
      case 1:
            fep->u.ofdm.code_rate_HP = FEC_2_3;
            deb_info("FEC_2_3\n");
            break;
      case 2:
            fep->u.ofdm.code_rate_HP = FEC_3_4;
            deb_info("FEC_3_4\n");
            break;
      case 3:
            fep->u.ofdm.code_rate_HP = FEC_5_6;
            deb_info("FEC_5_6\n");
            break;
      case 4:
            fep->u.ofdm.code_rate_HP = FEC_7_8;
            deb_info("FEC_7_8\n");
            break;
      }

      /* low coderate */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_lpcr,
                              reg_tpsd_lpcr_pos, reg_tpsd_lpcr_len,
                              &temp);
      if (ret)
            return ret;
      deb_info("CODERATE LP ");
      switch (temp) {
      case 0:
            fep->u.ofdm.code_rate_LP = FEC_1_2;
            deb_info("FEC_1_2\n");
            break;
      case 1:
            fep->u.ofdm.code_rate_LP = FEC_2_3;
            deb_info("FEC_2_3\n");
            break;
      case 2:
            fep->u.ofdm.code_rate_LP = FEC_3_4;
            deb_info("FEC_3_4\n");
            break;
      case 3:
            fep->u.ofdm.code_rate_LP = FEC_5_6;
            deb_info("FEC_5_6\n");
            break;
      case 4:
            fep->u.ofdm.code_rate_LP = FEC_7_8;
            deb_info("FEC_7_8\n");
            break;
      }

      /* guard interval */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_gi,
                              reg_tpsd_gi_pos, reg_tpsd_gi_len, &temp);
      if (ret)
            return ret;
      deb_info("GUARD INTERVAL ");
      switch (temp) {
      case 0:
            fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_32;
            deb_info("1_32\n");
            break;
      case 1:
            fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_16;
            deb_info("1_16\n");
            break;
      case 2:
            fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_8;
            deb_info("1_8\n");
            break;
      case 3:
            fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_4;
            deb_info("1_4\n");
            break;
      }

      /* fft */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_tpsd_txmod,
                              reg_tpsd_txmod_pos, reg_tpsd_txmod_len,
                              &temp);
      if (ret)
            return ret;
      deb_info("TRANSMISSION MODE ");
      switch (temp) {
      case 0:
            fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_2K;
            deb_info("2K\n");
            break;
      case 1:
            fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_8K;
            deb_info("8K\n");
            break;
      }

      /* bandwidth      */
      ret =
          af9005_read_register_bits(state->d, xd_g_reg_bw, reg_bw_pos,
                              reg_bw_len, &temp);
      deb_info("BANDWIDTH ");
      switch (temp) {
      case 0:
            fep->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
            deb_info("6\n");
            break;
      case 1:
            fep->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
            deb_info("7\n");
            break;
      case 2:
            fep->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
            deb_info("8\n");
            break;
      }
      return 0;
}

static void af9005_fe_release(struct dvb_frontend *fe)
{
      struct af9005_fe_state *state =
          (struct af9005_fe_state *)fe->demodulator_priv;
      kfree(state);
}

static struct dvb_frontend_ops af9005_fe_ops;

struct dvb_frontend *af9005_fe_attach(struct dvb_usb_device *d)
{
      struct af9005_fe_state *state = NULL;

      /* allocate memory for the internal state */
      state = kzalloc(sizeof(struct af9005_fe_state), GFP_KERNEL);
      if (state == NULL)
            goto error;

      deb_info("attaching frontend af9005\n");

      state->d = d;
      state->opened = 0;

      memcpy(&state->frontend.ops, &af9005_fe_ops,
             sizeof(struct dvb_frontend_ops));
      state->frontend.demodulator_priv = state;

      return &state->frontend;
      error:
      return NULL;
}

static struct dvb_frontend_ops af9005_fe_ops = {
      .info = {
             .name = "AF9005 USB DVB-T",
             .type = FE_OFDM,
             .frequency_min = 44250000,
             .frequency_max = 867250000,
             .frequency_stepsize = 250000,
             .caps = FE_CAN_INVERSION_AUTO |
             FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
             FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
             FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
             FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
             FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
             FE_CAN_HIERARCHY_AUTO,
             },

      .release = af9005_fe_release,

      .init = af9005_fe_init,
      .sleep = af9005_fe_sleep,
      .ts_bus_ctrl = af9005_ts_bus_ctrl,

      .set_frontend = af9005_fe_set_frontend,
      .get_frontend = af9005_fe_get_frontend,

      .read_status = af9005_fe_read_status,
      .read_ber = af9005_fe_read_ber,
      .read_signal_strength = af9005_fe_read_signal_strength,
      .read_snr = af9005_fe_read_snr,
      .read_ucblocks = af9005_fe_read_unc_blocks,
};

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