- 根目录:
- drivers
- media
- dvb
- ttusb-dec
- ttusbdecfe.c
/*
* TTUSB DEC Frontend Driver
*
* Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
*
* 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 "dvb_frontend.h"
#include "ttusbdecfe.h"
#define LOF_HI 10600000
#define LOF_LO 9750000
struct ttusbdecfe_state {
/* configuration settings */
const struct ttusbdecfe_config* config;
struct dvb_frontend frontend;
u8 hi_band;
u8 voltage;
};
static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
fe_status_t *status)
{
*status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
return 0;
}
static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
fe_status_t *status)
{
struct ttusbdecfe_state* state = fe->demodulator_priv;
u8 b[] = { 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 };
u8 result[4];
int len, ret;
*status=0;
ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
if(ret)
return ret;
if(len != 4) {
printk(KERN_ERR "%s: unexpected reply\n", __func__);
return -EIO;
}
switch(result[3]) {
case 1: /* not tuned yet */
case 2: /* no signal/no lock*/
break;
case 3: /* signal found and locked*/
*status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
break;
case 4:
*status = FE_TIMEDOUT;
break;
default:
pr_info("%s: returned unknown value: %d\n",
__func__, result[3]);
return -EIO;
}
return 0;
}
static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
u8 b[] = { 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff };
__be32 freq = htonl(p->frequency / 1000);
memcpy(&b[4], &freq, sizeof (u32));
state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
return 0;
}
static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
struct dvb_frontend_tune_settings* fesettings)
{
fesettings->min_delay_ms = 1500;
/* Drift compensation makes no sense for DVB-T */
fesettings->step_size = 0;
fesettings->max_drift = 0;
return 0;
}
static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
u8 b[] = { 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 };
__be32 freq;
__be32 sym_rate;
__be32 band;
__be32 lnb_voltage;
freq = htonl(p->frequency +
(state->hi_band ? LOF_HI : LOF_LO));
memcpy(&b[4], &freq, sizeof(u32));
sym_rate = htonl(p->u.qam.symbol_rate);
memcpy(&b[12], &sym_rate, sizeof(u32));
band = htonl(state->hi_band ? LOF_HI : LOF_LO);
memcpy(&b[24], &band, sizeof(u32));
lnb_voltage = htonl(state->voltage);
memcpy(&b[28], &lnb_voltage, sizeof(u32));
state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);
return 0;
}
static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
u8 b[] = { 0x00, 0xff, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00 };
memcpy(&b[4], cmd->msg, cmd->msg_len);
state->config->send_command(fe, 0x72,
sizeof(b) - (6 - cmd->msg_len), b,
NULL, NULL);
return 0;
}
static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
state->hi_band = (SEC_TONE_ON == tone);
return 0;
}
static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
switch (voltage) {
case SEC_VOLTAGE_13:
state->voltage = 13;
break;
case SEC_VOLTAGE_18:
state->voltage = 18;
break;
default:
return -EINVAL;
}
return 0;
}
static void ttusbdecfe_release(struct dvb_frontend* fe)
{
struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;
struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
{
struct ttusbdecfe_state* state = NULL;
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
if (state == NULL)
return NULL;
/* setup the state */
state->config = config;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;
struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
{
struct ttusbdecfe_state* state = NULL;
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
if (state == NULL)
return NULL;
/* setup the state */
state->config = config;
state->voltage = 0;
state->hi_band = 0;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
.info = {
.name = "TechnoTrend/Hauppauge DEC2000-t Frontend",
.type = FE_OFDM,
.frequency_min = 51000000,
.frequency_max = 858000000,
.frequency_stepsize = 62500,
.caps = 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_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO,
},
.release = ttusbdecfe_release,
.set_frontend = ttusbdecfe_dvbt_set_frontend,
.get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,
.read_status = ttusbdecfe_dvbt_read_status,
};
static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
.info = {
.name = "TechnoTrend/Hauppauge DEC3000-s Frontend",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 125,
.symbol_rate_min = 1000000, /* guessed */
.symbol_rate_max = 45000000, /* guessed */
.caps = 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 = ttusbdecfe_release,
.set_frontend = ttusbdecfe_dvbs_set_frontend,
.read_status = ttusbdecfe_dvbs_read_status,
.diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
.set_voltage = ttusbdecfe_dvbs_set_voltage,
.set_tone = ttusbdecfe_dvbs_set_tone,
};
MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);