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|
/*
* 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 "as102_drv.h"
#include "as10x_types.h"
#include "as10x_cmd.h"
static void as10x_fe_copy_tps_parameters(struct dtv_frontend_properties *dst,
struct as10x_tps *src);
static void as102_fe_copy_tune_parameters(struct as10x_tune_args *dst,
struct dtv_frontend_properties *src);
static int as102_fe_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
int ret = 0;
struct as102_dev_t *dev;
struct as10x_tune_args tune_args = { 0 };
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return -EBUSY;
as102_fe_copy_tune_parameters(&tune_args, p);
/* send abilis command: SET_TUNE */
ret = as10x_cmd_set_tune(&dev->bus_adap, &tune_args);
if (ret != 0)
dev_dbg(&dev->bus_adap.usb_dev->dev,
"as10x_cmd_set_tune failed. (err = %d)\n", ret);
mutex_unlock(&dev->bus_adap.lock);
return (ret < 0) ? -EINVAL : 0;
}
static int as102_fe_get_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
int ret = 0;
struct as102_dev_t *dev;
struct as10x_tps tps = { 0 };
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -EINVAL;
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return -EBUSY;
/* send abilis command: GET_TPS */
ret = as10x_cmd_get_tps(&dev->bus_adap, &tps);
if (ret == 0)
as10x_fe_copy_tps_parameters(p, &tps);
mutex_unlock(&dev->bus_adap.lock);
return (ret < 0) ? -EINVAL : 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, fe_status_t *status)
{
int ret = 0;
struct as102_dev_t *dev;
struct as10x_tune_status tstate = { 0 };
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return -EBUSY;
/* send abilis command: GET_TUNE_STATUS */
ret = as10x_cmd_get_tune_status(&dev->bus_adap, &tstate);
if (ret < 0) {
dev_dbg(&dev->bus_adap.usb_dev->dev,
"as10x_cmd_get_tune_status failed (err = %d)\n",
ret);
goto out;
}
dev->signal_strength = tstate.signal_strength;
dev->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;
break;
case TUNE_STATUS_STREAM_TUNED:
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC |
FE_HAS_LOCK;
break;
default:
*status = TUNE_STATUS_NOT_TUNED;
}
dev_dbg(&dev->bus_adap.usb_dev->dev,
"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) {
if (as10x_cmd_get_demod_stats(&dev->bus_adap,
(struct as10x_demod_stats *) &dev->demod_stats) < 0) {
memset(&dev->demod_stats, 0, sizeof(dev->demod_stats));
dev_dbg(&dev->bus_adap.usb_dev->dev,
"as10x_cmd_get_demod_stats failed (probably not tuned)\n");
} else {
dev_dbg(&dev->bus_adap.usb_dev->dev,
"demod status: fc: 0x%08x, bad fc: 0x%08x, bytes corrected: 0x%08x , MER: 0x%04x\n",
dev->demod_stats.frame_count,
dev->demod_stats.bad_frame_count,
dev->demod_stats.bytes_fixed_by_rs,
dev->demod_stats.mer);
}
} else {
memset(&dev->demod_stats, 0, sizeof(dev->demod_stats));
}
out:
mutex_unlock(&dev->bus_adap.lock);
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_dev_t *dev;
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
*snr = dev->demod_stats.mer;
return 0;
}
static int as102_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct as102_dev_t *dev;
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
*ber = dev->ber;
return 0;
}
static int as102_fe_read_signal_strength(struct dvb_frontend *fe,
u16 *strength)
{
struct as102_dev_t *dev;
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
*strength = (((0xffff * 400) * dev->signal_strength + 41000) * 2);
return 0;
}
static int as102_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct as102_dev_t *dev;
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
if (dev->demod_stats.has_started)
*ucblocks = dev->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_dev_t *dev;
int ret;
dev = (struct as102_dev_t *) fe->tuner_priv;
if (dev == NULL)
return -ENODEV;
if (mutex_lock_interruptible(&dev->bus_adap.lock))
return -EBUSY;
if (acquire) {
if (elna_enable)
as10x_cmd_set_context(&dev->bus_adap,
CONTEXT_LNA, dev->elna_cfg);
ret = as10x_cmd_turn_on(&dev->bus_adap);
} else {
ret = as10x_cmd_turn_off(&dev->bus_adap);
}
mutex_unlock(&dev->bus_adap.lock);
return ret;
}
static 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,
};
int as102_dvb_unregister_fe(struct dvb_frontend *fe)
{
/* unregister frontend */
dvb_unregister_frontend(fe);
/* detach frontend */
dvb_frontend_detach(fe);
return 0;
}
int as102_dvb_register_fe(struct as102_dev_t *as102_dev,
struct dvb_frontend *dvb_fe)
{
int errno;
struct dvb_adapter *dvb_adap;
if (as102_dev == NULL)
return -EINVAL;
/* extract dvb_adapter */
dvb_adap = &as102_dev->dvb_adap;
/* init frontend callback ops */
memcpy(&dvb_fe->ops, &as102_fe_ops, sizeof(struct dvb_frontend_ops));
strncpy(dvb_fe->ops.info.name, as102_dev->name,
sizeof(dvb_fe->ops.info.name));
/* register dvb frontend */
errno = dvb_register_frontend(dvb_adap, dvb_fe);
if (errno == 0)
dvb_fe->tuner_priv = as102_dev;
return errno;
}
static void as10x_fe_copy_tps_parameters(struct dtv_frontend_properties *fe_tps,
struct as10x_tps *as10x_tps)
{
/* extract constellation */
switch (as10x_tps->modulation) {
case CONST_QPSK:
fe_tps->modulation = QPSK;
break;
case CONST_QAM16:
fe_tps->modulation = QAM_16;
break;
case CONST_QAM64:
fe_tps->modulation = QAM_64;
break;
}
/* extract hierarchy */
switch (as10x_tps->hierarchy) {
case HIER_NONE:
fe_tps->hierarchy = HIERARCHY_NONE;
break;
case HIER_ALPHA_1:
fe_tps->hierarchy = HIERARCHY_1;
break;
case HIER_ALPHA_2:
fe_tps->hierarchy = HIERARCHY_2;
break;
case HIER_ALPHA_4:
fe_tps->hierarchy = HIERARCHY_4;
break;
}
/* extract code rate HP */
switch (as10x_tps->code_rate_HP) {
case CODE_RATE_1_2:
fe_tps->code_rate_HP = FEC_1_2;
break;
case CODE_RATE_2_3:
fe_tps->code_rate_HP = FEC_2_3;
break;
case CODE_RATE_3_4:
fe_tps->code_rate_HP = FEC_3_4;
break;
case CODE_RATE_5_6:
fe_tps->code_rate_HP = FEC_5_6;
break;
case CODE_RATE_7_8:
fe_tps->code_rate_HP = FEC_7_8;
break;
}
/* extract code rate LP */
switch (as10x_tps->code_rate_LP) {
case CODE_RATE_1_2:
fe_tps->code_rate_LP = FEC_1_2;
break;
case CODE_RATE_2_3:
fe_tps->code_rate_LP = FEC_2_3;
break;
case CODE_RATE_3_4:
fe_tps->code_rate_LP = FEC_3_4;
break;
case CODE_RATE_5_6:
fe_tps->code_rate_LP = FEC_5_6;
break;
case CODE_RATE_7_8:
fe_tps->code_rate_LP = FEC_7_8;
break;
}
/* extract guard interval */
switch (as10x_tps->guard_interval) {
case GUARD_INT_1_32:
fe_tps->guard_interval = GUARD_INTERVAL_1_32;
break;
case GUARD_INT_1_16:
fe_tps->guard_interval = GUARD_INTERVAL_1_16;
break;
case GUARD_INT_1_8:
fe_tps->guard_interval = GUARD_INTERVAL_1_8;
break;
case GUARD_INT_1_4:
fe_tps->guard_interval = GUARD_INTERVAL_1_4;
break;
}
/* extract transmission mode */
switch (as10x_tps->transmission_mode) {
case TRANS_MODE_2K:
fe_tps->transmission_mode = TRANSMISSION_MODE_2K;
break;
case TRANS_MODE_8K:
fe_tps->transmission_mode = TRANSMISSION_MODE_8K;
break;
}
}
static uint8_t as102_fe_get_code_rate(fe_code_rate_t 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 void as102_fe_copy_tune_parameters(struct as10x_tune_args *tune_args,
struct dtv_frontend_properties *params)
{
/* set frequency */
tune_args->freq = params->frequency / 1000;
/* fix interleaving_mode */
tune_args->interleaving_mode = INTLV_NATIVE;
switch (params->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 (params->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 (params->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 (params->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 (params->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",
params->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) &&
((params->code_rate_LP == FEC_NONE) ||
(params->code_rate_HP == FEC_NONE))) {
if (params->code_rate_LP == FEC_NONE) {
tune_args->hier_select = HIER_HIGH_PRIORITY;
tune_args->code_rate =
as102_fe_get_code_rate(params->code_rate_HP);
}
if (params->code_rate_HP == FEC_NONE) {
tune_args->hier_select = HIER_LOW_PRIORITY;
tune_args->code_rate =
as102_fe_get_code_rate(params->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(params->code_rate_HP);
}
}
|