480 lines
11 KiB
C
480 lines
11 KiB
C
/*
|
|
* Abilis Systems Single DVB-T Receiver
|
|
* Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
|
|
* Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
|
|
*
|
|
* 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, 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.
|
|
*/
|
|
|
|
#include <dvb_frontend.h>
|
|
|
|
#include "as102_fe.h"
|
|
|
|
struct as102_state {
|
|
struct dvb_frontend frontend;
|
|
struct as10x_demod_stats demod_stats;
|
|
|
|
const struct as102_fe_ops *ops;
|
|
void *priv;
|
|
uint8_t elna_cfg;
|
|
|
|
/* signal strength */
|
|
uint16_t signal_strength;
|
|
/* bit error rate */
|
|
uint32_t ber;
|
|
};
|
|
|
|
static uint8_t as102_fe_get_code_rate(enum fe_code_rate arg)
|
|
{
|
|
uint8_t c;
|
|
|
|
switch (arg) {
|
|
case FEC_1_2:
|
|
c = CODE_RATE_1_2;
|
|
break;
|
|
case FEC_2_3:
|
|
c = CODE_RATE_2_3;
|
|
break;
|
|
case FEC_3_4:
|
|
c = CODE_RATE_3_4;
|
|
break;
|
|
case FEC_5_6:
|
|
c = CODE_RATE_5_6;
|
|
break;
|
|
case FEC_7_8:
|
|
c = CODE_RATE_7_8;
|
|
break;
|
|
default:
|
|
c = CODE_RATE_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
static int as102_fe_set_frontend(struct dvb_frontend *fe)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
struct as10x_tune_args tune_args = { 0 };
|
|
|
|
/* set frequency */
|
|
tune_args.freq = c->frequency / 1000;
|
|
|
|
/* fix interleaving_mode */
|
|
tune_args.interleaving_mode = INTLV_NATIVE;
|
|
|
|
switch (c->bandwidth_hz) {
|
|
case 8000000:
|
|
tune_args.bandwidth = BW_8_MHZ;
|
|
break;
|
|
case 7000000:
|
|
tune_args.bandwidth = BW_7_MHZ;
|
|
break;
|
|
case 6000000:
|
|
tune_args.bandwidth = BW_6_MHZ;
|
|
break;
|
|
default:
|
|
tune_args.bandwidth = BW_8_MHZ;
|
|
}
|
|
|
|
switch (c->guard_interval) {
|
|
case GUARD_INTERVAL_1_32:
|
|
tune_args.guard_interval = GUARD_INT_1_32;
|
|
break;
|
|
case GUARD_INTERVAL_1_16:
|
|
tune_args.guard_interval = GUARD_INT_1_16;
|
|
break;
|
|
case GUARD_INTERVAL_1_8:
|
|
tune_args.guard_interval = GUARD_INT_1_8;
|
|
break;
|
|
case GUARD_INTERVAL_1_4:
|
|
tune_args.guard_interval = GUARD_INT_1_4;
|
|
break;
|
|
case GUARD_INTERVAL_AUTO:
|
|
default:
|
|
tune_args.guard_interval = GUARD_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
switch (c->modulation) {
|
|
case QPSK:
|
|
tune_args.modulation = CONST_QPSK;
|
|
break;
|
|
case QAM_16:
|
|
tune_args.modulation = CONST_QAM16;
|
|
break;
|
|
case QAM_64:
|
|
tune_args.modulation = CONST_QAM64;
|
|
break;
|
|
default:
|
|
tune_args.modulation = CONST_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
switch (c->transmission_mode) {
|
|
case TRANSMISSION_MODE_2K:
|
|
tune_args.transmission_mode = TRANS_MODE_2K;
|
|
break;
|
|
case TRANSMISSION_MODE_8K:
|
|
tune_args.transmission_mode = TRANS_MODE_8K;
|
|
break;
|
|
default:
|
|
tune_args.transmission_mode = TRANS_MODE_UNKNOWN;
|
|
}
|
|
|
|
switch (c->hierarchy) {
|
|
case HIERARCHY_NONE:
|
|
tune_args.hierarchy = HIER_NONE;
|
|
break;
|
|
case HIERARCHY_1:
|
|
tune_args.hierarchy = HIER_ALPHA_1;
|
|
break;
|
|
case HIERARCHY_2:
|
|
tune_args.hierarchy = HIER_ALPHA_2;
|
|
break;
|
|
case HIERARCHY_4:
|
|
tune_args.hierarchy = HIER_ALPHA_4;
|
|
break;
|
|
case HIERARCHY_AUTO:
|
|
tune_args.hierarchy = HIER_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
pr_debug("as102: tuner parameters: freq: %d bw: 0x%02x gi: 0x%02x\n",
|
|
c->frequency,
|
|
tune_args.bandwidth,
|
|
tune_args.guard_interval);
|
|
|
|
/*
|
|
* Detect a hierarchy selection
|
|
* if HP/LP are both set to FEC_NONE, HP will be selected.
|
|
*/
|
|
if ((tune_args.hierarchy != HIER_NONE) &&
|
|
((c->code_rate_LP == FEC_NONE) ||
|
|
(c->code_rate_HP == FEC_NONE))) {
|
|
|
|
if (c->code_rate_LP == FEC_NONE) {
|
|
tune_args.hier_select = HIER_HIGH_PRIORITY;
|
|
tune_args.code_rate =
|
|
as102_fe_get_code_rate(c->code_rate_HP);
|
|
}
|
|
|
|
if (c->code_rate_HP == FEC_NONE) {
|
|
tune_args.hier_select = HIER_LOW_PRIORITY;
|
|
tune_args.code_rate =
|
|
as102_fe_get_code_rate(c->code_rate_LP);
|
|
}
|
|
|
|
pr_debug("as102: \thierarchy: 0x%02x selected: %s code_rate_%s: 0x%02x\n",
|
|
tune_args.hierarchy,
|
|
tune_args.hier_select == HIER_HIGH_PRIORITY ?
|
|
"HP" : "LP",
|
|
tune_args.hier_select == HIER_HIGH_PRIORITY ?
|
|
"HP" : "LP",
|
|
tune_args.code_rate);
|
|
} else {
|
|
tune_args.code_rate =
|
|
as102_fe_get_code_rate(c->code_rate_HP);
|
|
}
|
|
|
|
/* Set frontend arguments */
|
|
return state->ops->set_tune(state->priv, &tune_args);
|
|
}
|
|
|
|
static int as102_fe_get_frontend(struct dvb_frontend *fe,
|
|
struct dtv_frontend_properties *c)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
int ret = 0;
|
|
struct as10x_tps tps = { 0 };
|
|
|
|
/* send abilis command: GET_TPS */
|
|
ret = state->ops->get_tps(state->priv, &tps);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* extract constellation */
|
|
switch (tps.modulation) {
|
|
case CONST_QPSK:
|
|
c->modulation = QPSK;
|
|
break;
|
|
case CONST_QAM16:
|
|
c->modulation = QAM_16;
|
|
break;
|
|
case CONST_QAM64:
|
|
c->modulation = QAM_64;
|
|
break;
|
|
}
|
|
|
|
/* extract hierarchy */
|
|
switch (tps.hierarchy) {
|
|
case HIER_NONE:
|
|
c->hierarchy = HIERARCHY_NONE;
|
|
break;
|
|
case HIER_ALPHA_1:
|
|
c->hierarchy = HIERARCHY_1;
|
|
break;
|
|
case HIER_ALPHA_2:
|
|
c->hierarchy = HIERARCHY_2;
|
|
break;
|
|
case HIER_ALPHA_4:
|
|
c->hierarchy = HIERARCHY_4;
|
|
break;
|
|
}
|
|
|
|
/* extract code rate HP */
|
|
switch (tps.code_rate_HP) {
|
|
case CODE_RATE_1_2:
|
|
c->code_rate_HP = FEC_1_2;
|
|
break;
|
|
case CODE_RATE_2_3:
|
|
c->code_rate_HP = FEC_2_3;
|
|
break;
|
|
case CODE_RATE_3_4:
|
|
c->code_rate_HP = FEC_3_4;
|
|
break;
|
|
case CODE_RATE_5_6:
|
|
c->code_rate_HP = FEC_5_6;
|
|
break;
|
|
case CODE_RATE_7_8:
|
|
c->code_rate_HP = FEC_7_8;
|
|
break;
|
|
}
|
|
|
|
/* extract code rate LP */
|
|
switch (tps.code_rate_LP) {
|
|
case CODE_RATE_1_2:
|
|
c->code_rate_LP = FEC_1_2;
|
|
break;
|
|
case CODE_RATE_2_3:
|
|
c->code_rate_LP = FEC_2_3;
|
|
break;
|
|
case CODE_RATE_3_4:
|
|
c->code_rate_LP = FEC_3_4;
|
|
break;
|
|
case CODE_RATE_5_6:
|
|
c->code_rate_LP = FEC_5_6;
|
|
break;
|
|
case CODE_RATE_7_8:
|
|
c->code_rate_LP = FEC_7_8;
|
|
break;
|
|
}
|
|
|
|
/* extract guard interval */
|
|
switch (tps.guard_interval) {
|
|
case GUARD_INT_1_32:
|
|
c->guard_interval = GUARD_INTERVAL_1_32;
|
|
break;
|
|
case GUARD_INT_1_16:
|
|
c->guard_interval = GUARD_INTERVAL_1_16;
|
|
break;
|
|
case GUARD_INT_1_8:
|
|
c->guard_interval = GUARD_INTERVAL_1_8;
|
|
break;
|
|
case GUARD_INT_1_4:
|
|
c->guard_interval = GUARD_INTERVAL_1_4;
|
|
break;
|
|
}
|
|
|
|
/* extract transmission mode */
|
|
switch (tps.transmission_mode) {
|
|
case TRANS_MODE_2K:
|
|
c->transmission_mode = TRANSMISSION_MODE_2K;
|
|
break;
|
|
case TRANS_MODE_8K:
|
|
c->transmission_mode = TRANSMISSION_MODE_8K;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_get_tune_settings(struct dvb_frontend *fe,
|
|
struct dvb_frontend_tune_settings *settings) {
|
|
|
|
settings->min_delay_ms = 1000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_read_status(struct dvb_frontend *fe, enum fe_status *status)
|
|
{
|
|
int ret = 0;
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
struct as10x_tune_status tstate = { 0 };
|
|
|
|
/* send abilis command: GET_TUNE_STATUS */
|
|
ret = state->ops->get_status(state->priv, &tstate);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
state->signal_strength = tstate.signal_strength;
|
|
state->ber = tstate.BER;
|
|
|
|
switch (tstate.tune_state) {
|
|
case TUNE_STATUS_SIGNAL_DVB_OK:
|
|
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
|
|
break;
|
|
case TUNE_STATUS_STREAM_DETECTED:
|
|
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC |
|
|
FE_HAS_VITERBI;
|
|
break;
|
|
case TUNE_STATUS_STREAM_TUNED:
|
|
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC |
|
|
FE_HAS_LOCK | FE_HAS_VITERBI;
|
|
break;
|
|
default:
|
|
*status = TUNE_STATUS_NOT_TUNED;
|
|
}
|
|
|
|
pr_debug("as102: tuner status: 0x%02x, strength %d, per: %d, ber: %d\n",
|
|
tstate.tune_state, tstate.signal_strength,
|
|
tstate.PER, tstate.BER);
|
|
|
|
if (!(*status & FE_HAS_LOCK)) {
|
|
memset(&state->demod_stats, 0, sizeof(state->demod_stats));
|
|
return 0;
|
|
}
|
|
|
|
ret = state->ops->get_stats(state->priv, &state->demod_stats);
|
|
if (ret < 0)
|
|
memset(&state->demod_stats, 0, sizeof(state->demod_stats));
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Note:
|
|
* - in AS102 SNR=MER
|
|
* - the SNR will be returned in linear terms, i.e. not in dB
|
|
* - the accuracy equals ±2dB for a SNR range from 4dB to 30dB
|
|
* - the accuracy is >2dB for SNR values outside this range
|
|
*/
|
|
static int as102_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
*snr = state->demod_stats.mer;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
*ber = state->ber;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_read_signal_strength(struct dvb_frontend *fe,
|
|
u16 *strength)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
*strength = (((0xffff * 400) * state->signal_strength + 41000) * 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
if (state->demod_stats.has_started)
|
|
*ucblocks = state->demod_stats.bad_frame_count;
|
|
else
|
|
*ucblocks = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int as102_fe_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
return state->ops->stream_ctrl(state->priv, acquire,
|
|
state->elna_cfg);
|
|
}
|
|
|
|
static void as102_fe_release(struct dvb_frontend *fe)
|
|
{
|
|
struct as102_state *state = fe->demodulator_priv;
|
|
|
|
kfree(state);
|
|
}
|
|
|
|
|
|
static const struct dvb_frontend_ops as102_fe_ops = {
|
|
.delsys = { SYS_DVBT },
|
|
.info = {
|
|
.name = "Abilis AS102 DVB-T",
|
|
.frequency_min = 174000000,
|
|
.frequency_max = 862000000,
|
|
.frequency_stepsize = 166667,
|
|
.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_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QPSK
|
|
| FE_CAN_QAM_AUTO
|
|
| FE_CAN_TRANSMISSION_MODE_AUTO
|
|
| FE_CAN_GUARD_INTERVAL_AUTO
|
|
| FE_CAN_HIERARCHY_AUTO
|
|
| FE_CAN_RECOVER
|
|
| FE_CAN_MUTE_TS
|
|
},
|
|
|
|
.set_frontend = as102_fe_set_frontend,
|
|
.get_frontend = as102_fe_get_frontend,
|
|
.get_tune_settings = as102_fe_get_tune_settings,
|
|
|
|
.read_status = as102_fe_read_status,
|
|
.read_snr = as102_fe_read_snr,
|
|
.read_ber = as102_fe_read_ber,
|
|
.read_signal_strength = as102_fe_read_signal_strength,
|
|
.read_ucblocks = as102_fe_read_ucblocks,
|
|
.ts_bus_ctrl = as102_fe_ts_bus_ctrl,
|
|
.release = as102_fe_release,
|
|
};
|
|
|
|
struct dvb_frontend *as102_attach(const char *name,
|
|
const struct as102_fe_ops *ops,
|
|
void *priv,
|
|
uint8_t elna_cfg)
|
|
{
|
|
struct as102_state *state;
|
|
struct dvb_frontend *fe;
|
|
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
fe = &state->frontend;
|
|
fe->demodulator_priv = state;
|
|
state->ops = ops;
|
|
state->priv = priv;
|
|
state->elna_cfg = elna_cfg;
|
|
|
|
/* init frontend callback ops */
|
|
memcpy(&fe->ops, &as102_fe_ops, sizeof(struct dvb_frontend_ops));
|
|
strncpy(fe->ops.info.name, name, sizeof(fe->ops.info.name));
|
|
|
|
return fe;
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(as102_attach);
|
|
|
|
MODULE_DESCRIPTION("as102-fe");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Pierrick Hascoet <pierrick.hascoet@abilis.com>");
|