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ttusbdecfe.c

/*
 * TTUSB DEC Frontend Driver
 *
 * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
 *
 * 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 "dvb_frontend.h"
#include "ttusbdecfe.h"


#define LOF_HI                10600000
#define LOF_LO                9750000

struct ttusbdecfe_state {

      /* configuration settings */
      const struct ttusbdecfe_config* config;

      struct dvb_frontend frontend;

      u8 hi_band;
      u8 voltage;
};


static int ttusbdecfe_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
      struct ttusbdecfe_state* state = fe->demodulator_priv;
      u8 b[] = { 0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00 };
      u8 result[4];
      int len, ret;

      *status=0;

      ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
      if(ret)
            return ret;

      if(len != 4) {
            printk(KERN_ERR "%s: unexpected reply\n", __FUNCTION__);
            return -EIO;
      }

      switch(result[3]) {
            case 1:  /* not tuned yet */
            case 2:  /* no signal/no lock*/
                  break;
            case 3:      /* signal found and locked*/
                  *status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
                  FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
                  break;
            case 4:
                  *status = FE_TIMEDOUT;
                  break;
            default:
                  pr_info("%s: returned unknown value: %d\n",
                        __FUNCTION__, result[3]);
                  return -EIO;
      }

      return 0;
}

static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
      struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
      u8 b[] = { 0x00, 0x00, 0x00, 0x03,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x01,
               0x00, 0x00, 0x00, 0xff,
               0x00, 0x00, 0x00, 0xff };

      u32 freq = htonl(p->frequency / 1000);
      memcpy(&b[4], &freq, sizeof (u32));
      state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

      return 0;
}

static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
                              struct dvb_frontend_tune_settings* fesettings)
{
            fesettings->min_delay_ms = 1500;
            /* Drift compensation makes no sense for DVB-T */
            fesettings->step_size = 0;
            fesettings->max_drift = 0;
            return 0;
}

static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
      struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

      u8 b[] = { 0x00, 0x00, 0x00, 0x01,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x01,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00 };
      u32 freq;
      u32 sym_rate;
      u32 band;
      u32 lnb_voltage;

      freq = htonl(p->frequency +
             (state->hi_band ? LOF_HI : LOF_LO));
      memcpy(&b[4], &freq, sizeof(u32));
      sym_rate = htonl(p->u.qam.symbol_rate);
      memcpy(&b[12], &sym_rate, sizeof(u32));
      band = htonl(state->hi_band ? LOF_HI : LOF_LO);
      memcpy(&b[24], &band, sizeof(u32));
      lnb_voltage = htonl(state->voltage);
      memcpy(&b[28], &lnb_voltage, sizeof(u32));

      state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

      return 0;
}

static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
{
      struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
      u8 b[] = { 0x00, 0xff, 0x00, 0x00,
               0x00, 0x00, 0x00, 0x00,
               0x00, 0x00 };

      memcpy(&b[4], cmd->msg, cmd->msg_len);

      state->config->send_command(fe, 0x72,
                            sizeof(b) - (6 - cmd->msg_len), b,
                            NULL, NULL);

      return 0;
}


static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
      struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

      state->hi_band = (SEC_TONE_ON == tone);

      return 0;
}


static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
      struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

      switch (voltage) {
      case SEC_VOLTAGE_13:
            state->voltage = 13;
            break;
      case SEC_VOLTAGE_18:
            state->voltage = 18;
            break;
      default:
            return -EINVAL;
      }

      return 0;
}

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

static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;

struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
{
      struct ttusbdecfe_state* state = NULL;

      /* allocate memory for the internal state */
      state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
      if (state == NULL)
            return NULL;

      /* setup the state */
      state->config = config;

      /* create dvb_frontend */
      memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
      state->frontend.demodulator_priv = state;
      return &state->frontend;
}

static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;

struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
{
      struct ttusbdecfe_state* state = NULL;

      /* allocate memory for the internal state */
      state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
      if (state == NULL)
            return NULL;

      /* setup the state */
      state->config = config;
      state->voltage = 0;
      state->hi_band = 0;

      /* create dvb_frontend */
      memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
      state->frontend.demodulator_priv = state;
      return &state->frontend;
}

static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {

      .info = {
            .name             = "TechnoTrend/Hauppauge DEC2000-t Frontend",
            .type             = FE_OFDM,
            .frequency_min          = 51000000,
            .frequency_max          = 858000000,
            .frequency_stepsize     = 62500,
            .caps =     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_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
                  FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
                  FE_CAN_HIERARCHY_AUTO,
      },

      .release = ttusbdecfe_release,

      .set_frontend = ttusbdecfe_dvbt_set_frontend,

      .get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,

      .read_status = ttusbdecfe_read_status,
};

static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {

      .info = {
            .name             = "TechnoTrend/Hauppauge DEC3000-s Frontend",
            .type             = FE_QPSK,
            .frequency_min          = 950000,
            .frequency_max          = 2150000,
            .frequency_stepsize     = 125,
            .symbol_rate_min        = 1000000,  /* guessed */
            .symbol_rate_max        = 45000000, /* guessed */
            .caps =     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
      },

      .release = ttusbdecfe_release,

      .set_frontend = ttusbdecfe_dvbs_set_frontend,

      .read_status = ttusbdecfe_read_status,

      .diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
      .set_voltage = ttusbdecfe_dvbs_set_voltage,
      .set_tone = ttusbdecfe_dvbs_set_tone,
};

MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);

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