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dvb_dummy_fe.c

/*
 *  Driver for Dummy Frontend
 *
 *  Written by Emard <emard@softhome.net>
 *
 *  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/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>

#include "dvb_frontend.h"
#include "dvb_dummy_fe.h"


struct dvb_dummy_fe_state {
      struct dvb_frontend frontend;
};


static int dvb_dummy_fe_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
      *status = FE_HAS_SIGNAL
            | FE_HAS_CARRIER
            | FE_HAS_VITERBI
            | FE_HAS_SYNC
            | FE_HAS_LOCK;

      return 0;
}

static int dvb_dummy_fe_read_ber(struct dvb_frontend* fe, u32* ber)
{
      *ber = 0;
      return 0;
}

static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
      *strength = 0;
      return 0;
}

static int dvb_dummy_fe_read_snr(struct dvb_frontend* fe, u16* snr)
{
      *snr = 0;
      return 0;
}

static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
      *ucblocks = 0;
      return 0;
}

static int dvb_dummy_fe_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
      return 0;
}

static int dvb_dummy_fe_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
      if (fe->ops->tuner_ops->set_params) {
            fe->ops->tuner_ops->set_params(fe, p);
            if (fe->ops->i2c_gate_ctrl) fe->ops->i2c_gate_ctrl(fe, 0);
      }

      return 0;
}

static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
{
      return 0;
}

static int dvb_dummy_fe_init(struct dvb_frontend* fe)
{
      return 0;
}

static int dvb_dummy_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
      return 0;
}

static int dvb_dummy_fe_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
      return 0;
}

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

static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;

struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
{
      struct dvb_dummy_fe_state* state = NULL;

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

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

error:
      kfree(state);
      return NULL;
}

static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;

struct dvb_frontend* dvb_dummy_fe_qpsk_attach()
{
      struct dvb_dummy_fe_state* state = NULL;

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

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

error:
      kfree(state);
      return NULL;
}

static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;

struct dvb_frontend* dvb_dummy_fe_qam_attach()
{
      struct dvb_dummy_fe_state* state = NULL;

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

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

error:
      kfree(state);
      return NULL;
}

static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {

      .info = {
            .name             = "Dummy DVB-T",
            .type             = FE_OFDM,
            .frequency_min          = 0,
            .frequency_max          = 863250000,
            .frequency_stepsize     = 62500,
            .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
                        FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
                        FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | 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 = dvb_dummy_fe_release,

      .init = dvb_dummy_fe_init,
      .sleep = dvb_dummy_fe_sleep,

      .set_frontend = dvb_dummy_fe_set_frontend,
      .get_frontend = dvb_dummy_fe_get_frontend,

      .read_status = dvb_dummy_fe_read_status,
      .read_ber = dvb_dummy_fe_read_ber,
      .read_signal_strength = dvb_dummy_fe_read_signal_strength,
      .read_snr = dvb_dummy_fe_read_snr,
      .read_ucblocks = dvb_dummy_fe_read_ucblocks,
};

static struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {

      .info = {
            .name             = "Dummy DVB-C",
            .type             = FE_QAM,
            .frequency_stepsize     = 62500,
            .frequency_min          = 51000000,
            .frequency_max          = 858000000,
            .symbol_rate_min  = (57840000/2)/64,     /* SACLK/64 == (XIN/2)/64 */
            .symbol_rate_max  = (57840000/2)/4,      /* SACLK/4 */
            .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
                  FE_CAN_QAM_128 | FE_CAN_QAM_256 |
                  FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
      },

      .release = dvb_dummy_fe_release,

      .init = dvb_dummy_fe_init,
      .sleep = dvb_dummy_fe_sleep,

      .set_frontend = dvb_dummy_fe_set_frontend,
      .get_frontend = dvb_dummy_fe_get_frontend,

      .read_status = dvb_dummy_fe_read_status,
      .read_ber = dvb_dummy_fe_read_ber,
      .read_signal_strength = dvb_dummy_fe_read_signal_strength,
      .read_snr = dvb_dummy_fe_read_snr,
      .read_ucblocks = dvb_dummy_fe_read_ucblocks,
};

static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {

      .info = {
            .name             = "Dummy DVB-S",
            .type             = FE_QPSK,
            .frequency_min          = 950000,
            .frequency_max          = 2150000,
            .frequency_stepsize     = 250,           /* kHz for QPSK frontends */
            .frequency_tolerance    = 29500,
            .symbol_rate_min  = 1000000,
            .symbol_rate_max  = 45000000,
            .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
      },

      .release = dvb_dummy_fe_release,

      .init = dvb_dummy_fe_init,
      .sleep = dvb_dummy_fe_sleep,

      .set_frontend = dvb_dummy_fe_set_frontend,
      .get_frontend = dvb_dummy_fe_get_frontend,

      .read_status = dvb_dummy_fe_read_status,
      .read_ber = dvb_dummy_fe_read_ber,
      .read_signal_strength = dvb_dummy_fe_read_signal_strength,
      .read_snr = dvb_dummy_fe_read_snr,
      .read_ucblocks = dvb_dummy_fe_read_ucblocks,

      .set_voltage = dvb_dummy_fe_set_voltage,
      .set_tone = dvb_dummy_fe_set_tone,
};

MODULE_DESCRIPTION("DVB DUMMY Frontend");
MODULE_AUTHOR("Emard");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);

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