dvb_dummy_fe.c

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/*
 *  Driver for Dummy Frontend
 *
 *  Written by Emard <[email protected]>
 *
 *  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;
}

/*
 * Only needed if it actually reads something from the hardware
 */
static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe)
{
    return 0;
}

static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
{
    if (fe->ops.tuner_ops.set_params) {
        fe->ops.tuner_ops.set_params(fe);
        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 = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
    if (!state)
        return NULL;

    /* 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;
}

static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;

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

    /* allocate memory for the internal state */
    state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
    if (!state)
        return NULL;

    /* 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;
}

static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;

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

    /* allocate memory for the internal state */
    state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
    if (!state)
        return NULL;

    /* 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;
}

static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
    .delsys = { SYS_DVBT },
    .info = {
        .name           = "Dummy DVB-T",
        .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 = {
    .delsys = { SYS_DVBC_ANNEX_A },
    .info = {
        .name           = "Dummy DVB-C",
        .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 = {
    .delsys = { SYS_DVBS },
    .info = {
        .name           = "Dummy DVB-S",
        .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);