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257 lines
6.1 KiB
257 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/ |
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* Typhoon/ Yuan DVB-T USB2.0 receiver. |
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* |
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* Copyright (C) 2005 Patrick Boettcher <[email protected]> |
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* |
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* see Documentation/driver-api/media/drivers/dvb-usb.rst for more information |
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*/ |
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#include "dtt200u.h" |
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struct dtt200u_fe_state { |
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struct dvb_usb_device *d; |
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enum fe_status stat; |
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struct dtv_frontend_properties fep; |
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struct dvb_frontend frontend; |
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unsigned char data[80]; |
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struct mutex data_mutex; |
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}; |
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static int dtt200u_fe_read_status(struct dvb_frontend *fe, |
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enum fe_status *stat) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = GET_TUNE_STATUS; |
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ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0); |
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if (ret < 0) { |
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*stat = 0; |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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switch (state->data[0]) { |
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case 0x01: |
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*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | |
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FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
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break; |
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case 0x00: /* pending */ |
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*stat = FE_TIMEDOUT; /* during set_frontend */ |
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break; |
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default: |
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case 0x02: /* failed */ |
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*stat = 0; |
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break; |
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} |
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mutex_unlock(&state->data_mutex); |
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return 0; |
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} |
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static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = GET_VIT_ERR_CNT; |
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ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0); |
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if (ret >= 0) |
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*ber = (state->data[0] << 16) | (state->data[1] << 8) | state->data[2]; |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = GET_RS_UNCOR_BLK_CNT; |
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ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 2, 0); |
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if (ret >= 0) |
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*unc = (state->data[0] << 8) | state->data[1]; |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = GET_AGC; |
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ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0); |
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if (ret >= 0) |
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*strength = (state->data[0] << 8) | state->data[0]; |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = GET_SNR; |
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ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0); |
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if (ret >= 0) |
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*snr = ~((state->data[0] << 8) | state->data[0]); |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_init(struct dvb_frontend* fe) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = SET_INIT; |
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ret = dvb_usb_generic_write(state->d, state->data, 1); |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_sleep(struct dvb_frontend* fe) |
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{ |
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return dtt200u_fe_init(fe); |
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} |
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static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) |
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{ |
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tune->min_delay_ms = 1500; |
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tune->step_size = 0; |
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tune->max_drift = 0; |
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return 0; |
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} |
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static int dtt200u_fe_set_frontend(struct dvb_frontend *fe) |
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{ |
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struct dtv_frontend_properties *fep = &fe->dtv_property_cache; |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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int ret; |
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u16 freq = fep->frequency / 250000; |
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mutex_lock(&state->data_mutex); |
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state->data[0] = SET_BANDWIDTH; |
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switch (fep->bandwidth_hz) { |
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case 8000000: |
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state->data[1] = 8; |
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break; |
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case 7000000: |
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state->data[1] = 7; |
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break; |
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case 6000000: |
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state->data[1] = 6; |
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break; |
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default: |
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ret = -EINVAL; |
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goto ret; |
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} |
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ret = dvb_usb_generic_write(state->d, state->data, 2); |
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if (ret < 0) |
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goto ret; |
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state->data[0] = SET_RF_FREQ; |
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state->data[1] = freq & 0xff; |
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state->data[2] = (freq >> 8) & 0xff; |
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ret = dvb_usb_generic_write(state->d, state->data, 3); |
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if (ret < 0) |
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goto ret; |
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ret: |
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mutex_unlock(&state->data_mutex); |
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return ret; |
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} |
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static int dtt200u_fe_get_frontend(struct dvb_frontend* fe, |
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struct dtv_frontend_properties *fep) |
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{ |
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struct dtt200u_fe_state *state = fe->demodulator_priv; |
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memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties)); |
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return 0; |
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} |
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static void dtt200u_fe_release(struct dvb_frontend* fe) |
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{ |
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struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv; |
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kfree(state); |
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} |
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static const struct dvb_frontend_ops dtt200u_fe_ops; |
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struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d) |
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{ |
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struct dtt200u_fe_state* state = NULL; |
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/* allocate memory for the internal state */ |
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state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL); |
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if (state == NULL) |
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goto error; |
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deb_info("attaching frontend dtt200u\n"); |
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state->d = d; |
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mutex_init(&state->data_mutex); |
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memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops)); |
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state->frontend.demodulator_priv = state; |
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return &state->frontend; |
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error: |
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return NULL; |
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} |
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static const struct dvb_frontend_ops dtt200u_fe_ops = { |
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.delsys = { SYS_DVBT }, |
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.info = { |
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.name = "WideView USB DVB-T", |
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.frequency_min_hz = 44250 * kHz, |
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.frequency_max_hz = 867250 * kHz, |
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.frequency_stepsize_hz = 250 * kHz, |
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.caps = FE_CAN_INVERSION_AUTO | |
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | |
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FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | |
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FE_CAN_TRANSMISSION_MODE_AUTO | |
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FE_CAN_GUARD_INTERVAL_AUTO | |
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FE_CAN_RECOVER | |
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FE_CAN_HIERARCHY_AUTO, |
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}, |
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.release = dtt200u_fe_release, |
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.init = dtt200u_fe_init, |
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.sleep = dtt200u_fe_sleep, |
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.set_frontend = dtt200u_fe_set_frontend, |
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.get_frontend = dtt200u_fe_get_frontend, |
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.get_tune_settings = dtt200u_fe_get_tune_settings, |
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.read_status = dtt200u_fe_read_status, |
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.read_ber = dtt200u_fe_read_ber, |
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.read_signal_strength = dtt200u_fe_read_signal_strength, |
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.read_snr = dtt200u_fe_read_snr, |
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.read_ucblocks = dtt200u_fe_read_unc_blocks, |
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};
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