/* Frontend part of the Linux driver for the Yakumo/Hama/Typhoon DVB-T
* USB2.0 receiver.
*
* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
*
* 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, version 2.
*
* see Documentation/dvb/README.dvb-usb for more information
*/
#include "dtt200u.h"
struct dtt200u_fe_state {
struct dvb_usb_device *d;
struct dvb_frontend_parameters fep;
struct dvb_frontend frontend;
};
#define moan(which,what) info("unexpected value in '%s' for cmd '%02x' - please report to linux-dvb@linuxtv.org",which,what)
static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 bw = GET_TUNE_STAT;
u8 br[3] = { 0 };
// u8 bdeb[5] = { 0 };
dvb_usb_generic_rw(state->d,&bw,1,br,3,0);
switch (br[0]) {
case 0x01:
*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
break;
case 0x00:
*stat = 0;
break;
default:
moan("br[0]",GET_TUNE_STAT);
break;
}
// bw[0] = 0x88;
// dvb_usb_generic_rw(state->d,bw,1,bdeb,5,0);
// deb_info("%02x: %02x %02x %02x %02x %02x\n",bw[0],bdeb[0],bdeb[1],bdeb[2],bdeb[3],bdeb[4]);
return 0;
}
static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 bw = GET_BER;
*ber = 0;
dvb_usb_generic_rw(state->d,&bw,1,(u8*) ber,3,0);
return 0;
}
static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 bw = GET_UNK;
*unc = 0;
dvb_usb_generic_rw(state->d,&bw,1,(u8*) unc,3,0);
return 0;
}
static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 bw = GET_SIG_STRENGTH, b;
dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
*strength = (b << 8) | b;
return 0;
}
static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 bw = GET_SNR,br;
dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
*snr = ~((br << 8) | br);
return 0;
}
static int dtt200u_fe_init(struct dvb_frontend* fe)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u8 b = RESET_DEMOD;
return dvb_usb_generic_write(state->d,&b,1);
}
static int dtt200u_fe_sleep(struct dvb_frontend* fe)
{
return dtt200u_fe_init(fe);
}
static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1500;
tune->step_size = 166667;
tune->max_drift = 166667 * 2;
return 0;
}
static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
u16 freq = fep->frequency / 250000;
u8 bw,bwbuf[2] = { SET_BANDWIDTH, 0 }, freqbuf[3] = { SET_FREQUENCY, 0, 0 };
switch (fep->u.ofdm.bandwidth) {
case BANDWIDTH_8_MHZ: bw = 8; break;
case BANDWIDTH_7_MHZ: bw = 7; break;
case BANDWIDTH_6_MHZ: bw = 6; break;
case BANDWIDTH_AUTO: return -EOPNOTSUPP;
default:
return -EINVAL;
}
deb_info("set_frontend\n");
bwbuf[1] = bw;
dvb_usb_generic_write(state->d,bwbuf,2);
freqbuf[1] = freq & 0xff;
freqbuf[2] = (freq >> 8) & 0xff;
dvb_usb_generic_write(state->d,freqbuf,3);
memcpy(&state->fep,fep,sizeof(struct dvb_frontend_parameters));
return 0;
}
static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
return 0;
}
static void dtt200u_fe_release(struct dvb_frontend* fe)
{
struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops dtt200u_fe_ops;
struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
{
struct dtt200u_fe_state* state = NULL;
/* allocate memory for the internal state */
state = (struct dtt200u_fe_state*) kmalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
if (state == NULL)
goto error;
memset(state,0,sizeof(struct dtt200u_fe_state));
deb_info("attaching frontend dtt200u\n");
state->d = d;
state->frontend.ops = &dtt200u_fe_ops;
state->frontend.demodulator_priv = state;
goto success;
error:
return NULL;
success:
return &state->frontend;
}
static struct dvb_frontend_ops dtt200u_fe_ops = {
.info = {
.name = "DTT200U (Yakumo/Typhoon/Hama) DVB-T",
.type = FE_OFDM,
.frequency_min = 44250000,
.frequency_max = 867250000,
.frequency_stepsize = 250000,
.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_RECOVER |
FE_CAN_HIERARCHY_AUTO,
},
.release = dtt200u_fe_release,
.init = dtt200u_fe_init,
.sleep = dtt200u_fe_sleep,
.set_frontend = dtt200u_fe_set_frontend,
.get_frontend = dtt200u_fe_get_frontend,
.get_tune_settings = dtt200u_fe_get_tune_settings,
.read_status = dtt200u_fe_read_status,
.read_ber = dtt200u_fe_read_ber,
.read_signal_strength = dtt200u_fe_read_signal_strength,
.read_snr = dtt200u_fe_read_snr,
.read_ucblocks = dtt200u_fe_read_unc_blocks,
};
