- 根目录:
- drivers
- media
- usb
- dvb-usb
- cinergyT2-fe.c
/*
* TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
*
* Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
*
* Based on the dvb-usb-framework code and the
* original Terratec Cinergy T2 driver by:
*
* Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
* Holger Waechtler <holger@qanu.de>
*
* Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
*
* 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 "cinergyT2.h"
/**
* convert linux-dvb frontend parameter set into TPS.
* See ETSI ETS-300744, section 4.6.2, table 9 for details.
*
* This function is probably reusable and may better get placed in a support
* library.
*
* We replace errornous fields by default TPS fields (the ones with value 0).
*/
static uint16_t compute_tps(struct dtv_frontend_properties *op)
{
uint16_t tps = 0;
switch (op->code_rate_HP) {
case FEC_2_3:
tps |= (1 << 7);
break;
case FEC_3_4:
tps |= (2 << 7);
break;
case FEC_5_6:
tps |= (3 << 7);
break;
case FEC_7_8:
tps |= (4 << 7);
break;
case FEC_1_2:
case FEC_AUTO:
default:
/* tps |= (0 << 7) */;
}
switch (op->code_rate_LP) {
case FEC_2_3:
tps |= (1 << 4);
break;
case FEC_3_4:
tps |= (2 << 4);
break;
case FEC_5_6:
tps |= (3 << 4);
break;
case FEC_7_8:
tps |= (4 << 4);
break;
case FEC_1_2:
case FEC_AUTO:
default:
/* tps |= (0 << 4) */;
}
switch (op->modulation) {
case QAM_16:
tps |= (1 << 13);
break;
case QAM_64:
tps |= (2 << 13);
break;
case QPSK:
default:
/* tps |= (0 << 13) */;
}
switch (op->transmission_mode) {
case TRANSMISSION_MODE_8K:
tps |= (1 << 0);
break;
case TRANSMISSION_MODE_2K:
default:
/* tps |= (0 << 0) */;
}
switch (op->guard_interval) {
case GUARD_INTERVAL_1_16:
tps |= (1 << 2);
break;
case GUARD_INTERVAL_1_8:
tps |= (2 << 2);
break;
case GUARD_INTERVAL_1_4:
tps |= (3 << 2);
break;
case GUARD_INTERVAL_1_32:
default:
/* tps |= (0 << 2) */;
}
switch (op->hierarchy) {
case HIERARCHY_1:
tps |= (1 << 10);
break;
case HIERARCHY_2:
tps |= (2 << 10);
break;
case HIERARCHY_4:
tps |= (3 << 10);
break;
case HIERARCHY_NONE:
default:
/* tps |= (0 << 10) */;
}
return tps;
}
struct cinergyt2_fe_state {
struct dvb_frontend fe;
struct dvb_usb_device *d;
};
static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
fe_status_t *status)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_get_status_msg result;
u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
int ret;
ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result,
sizeof(result), 0);
if (ret < 0)
return ret;
*status = 0;
if (0xffff - le16_to_cpu(result.gain) > 30)
*status |= FE_HAS_SIGNAL;
if (result.lock_bits & (1 << 6))
*status |= FE_HAS_LOCK;
if (result.lock_bits & (1 << 5))
*status |= FE_HAS_SYNC;
if (result.lock_bits & (1 << 4))
*status |= FE_HAS_CARRIER;
if (result.lock_bits & (1 << 1))
*status |= FE_HAS_VITERBI;
if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
*status &= ~FE_HAS_LOCK;
return 0;
}
static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_get_status_msg status;
char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
int ret;
ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
sizeof(status), 0);
if (ret < 0)
return ret;
*ber = le32_to_cpu(status.viterbi_error_rate);
return 0;
}
static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_get_status_msg status;
u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
int ret;
ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status,
sizeof(status), 0);
if (ret < 0) {
err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n",
ret);
return ret;
}
*unc = le32_to_cpu(status.uncorrected_block_count);
return 0;
}
static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
u16 *strength)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_get_status_msg status;
char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
int ret;
ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
sizeof(status), 0);
if (ret < 0) {
err("cinergyt2_fe_read_signal_strength() Failed!"
" (Error=%d)\n", ret);
return ret;
}
*strength = (0xffff - le16_to_cpu(status.gain));
return 0;
}
static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_get_status_msg status;
char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
int ret;
ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
sizeof(status), 0);
if (ret < 0) {
err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret);
return ret;
}
*snr = (status.snr << 8) | status.snr;
return 0;
}
static int cinergyt2_fe_init(struct dvb_frontend *fe)
{
return 0;
}
static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
{
deb_info("cinergyt2_fe_sleep() Called\n");
return 0;
}
static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 800;
return 0;
}
static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
struct cinergyt2_fe_state *state = fe->demodulator_priv;
struct dvbt_set_parameters_msg param;
char result[2];
int err;
param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
param.tps = cpu_to_le16(compute_tps(fep));
param.freq = cpu_to_le32(fep->frequency / 1000);
param.flags = 0;
switch (fep->bandwidth_hz) {
default:
case 8000000:
param.bandwidth = 8;
break;
case 7000000:
param.bandwidth = 7;
break;
case 6000000:
param.bandwidth = 6;
break;
}
err = dvb_usb_generic_rw(state->d,
(char *)¶m, sizeof(param),
result, sizeof(result), 0);
if (err < 0)
err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
return (err < 0) ? err : 0;
}
static void cinergyt2_fe_release(struct dvb_frontend *fe)
{
struct cinergyt2_fe_state *state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops cinergyt2_fe_ops;
struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
{
struct cinergyt2_fe_state *s = kzalloc(sizeof(
struct cinergyt2_fe_state), GFP_KERNEL);
if (s == NULL)
return NULL;
s->d = d;
memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
s->fe.demodulator_priv = s;
return &s->fe;
}
static struct dvb_frontend_ops cinergyt2_fe_ops = {
.delsys = { SYS_DVBT },
.info = {
.name = DRIVER_NAME,
.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_QPSK
| 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
| FE_CAN_RECOVER
| FE_CAN_MUTE_TS
},
.release = cinergyt2_fe_release,
.init = cinergyt2_fe_init,
.sleep = cinergyt2_fe_sleep,
.set_frontend = cinergyt2_fe_set_frontend,
.get_tune_settings = cinergyt2_fe_get_tune_settings,
.read_status = cinergyt2_fe_read_status,
.read_ber = cinergyt2_fe_read_ber,
.read_signal_strength = cinergyt2_fe_read_signal_strength,
.read_snr = cinergyt2_fe_read_snr,
.read_ucblocks = cinergyt2_fe_read_unc_blocks,
};