318 lines
6.9 KiB
C
318 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
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*
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* Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
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*
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* Based on the dvb-usb-framework code and the
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* original Terratec Cinergy T2 driver by:
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*
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* Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
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* Holger Waechtler <holger@qanu.de>
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*
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* Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
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*/
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#include "cinergyT2.h"
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/*
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* convert linux-dvb frontend parameter set into TPS.
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* See ETSI ETS-300744, section 4.6.2, table 9 for details.
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*
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* This function is probably reusable and may better get placed in a support
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* library.
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*
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* We replace erroneous fields by default TPS fields (the ones with value 0).
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*/
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static uint16_t compute_tps(struct dtv_frontend_properties *op)
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{
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uint16_t tps = 0;
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switch (op->code_rate_HP) {
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case FEC_2_3:
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tps |= (1 << 7);
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break;
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case FEC_3_4:
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tps |= (2 << 7);
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break;
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case FEC_5_6:
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tps |= (3 << 7);
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break;
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case FEC_7_8:
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tps |= (4 << 7);
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break;
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case FEC_1_2:
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case FEC_AUTO:
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default:
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/* tps |= (0 << 7) */;
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}
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switch (op->code_rate_LP) {
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case FEC_2_3:
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tps |= (1 << 4);
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break;
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case FEC_3_4:
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tps |= (2 << 4);
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break;
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case FEC_5_6:
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tps |= (3 << 4);
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break;
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case FEC_7_8:
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tps |= (4 << 4);
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break;
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case FEC_1_2:
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case FEC_AUTO:
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default:
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/* tps |= (0 << 4) */;
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}
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switch (op->modulation) {
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case QAM_16:
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tps |= (1 << 13);
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break;
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case QAM_64:
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tps |= (2 << 13);
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break;
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case QPSK:
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default:
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/* tps |= (0 << 13) */;
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}
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switch (op->transmission_mode) {
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case TRANSMISSION_MODE_8K:
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tps |= (1 << 0);
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break;
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case TRANSMISSION_MODE_2K:
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default:
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/* tps |= (0 << 0) */;
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}
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switch (op->guard_interval) {
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case GUARD_INTERVAL_1_16:
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tps |= (1 << 2);
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break;
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case GUARD_INTERVAL_1_8:
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tps |= (2 << 2);
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break;
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case GUARD_INTERVAL_1_4:
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tps |= (3 << 2);
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break;
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case GUARD_INTERVAL_1_32:
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default:
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/* tps |= (0 << 2) */;
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}
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switch (op->hierarchy) {
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case HIERARCHY_1:
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tps |= (1 << 10);
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break;
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case HIERARCHY_2:
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tps |= (2 << 10);
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break;
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case HIERARCHY_4:
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tps |= (3 << 10);
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break;
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case HIERARCHY_NONE:
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default:
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/* tps |= (0 << 10) */;
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}
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return tps;
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}
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struct cinergyt2_fe_state {
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struct dvb_frontend fe;
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struct dvb_usb_device *d;
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unsigned char data[64];
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struct mutex data_mutex;
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struct dvbt_get_status_msg status;
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};
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static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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struct cinergyt2_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] = CINERGYT2_EP1_GET_TUNER_STATUS;
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ret = dvb_usb_generic_rw(state->d, state->data, 1,
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state->data, sizeof(state->status), 0);
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if (!ret)
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memcpy(&state->status, state->data, sizeof(state->status));
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mutex_unlock(&state->data_mutex);
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if (ret < 0)
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return ret;
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*status = 0;
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if (0xffff - le16_to_cpu(state->status.gain) > 30)
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*status |= FE_HAS_SIGNAL;
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if (state->status.lock_bits & (1 << 6))
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*status |= FE_HAS_LOCK;
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if (state->status.lock_bits & (1 << 5))
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*status |= FE_HAS_SYNC;
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if (state->status.lock_bits & (1 << 4))
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*status |= FE_HAS_CARRIER;
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if (state->status.lock_bits & (1 << 1))
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*status |= FE_HAS_VITERBI;
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if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
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(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
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*status &= ~FE_HAS_LOCK;
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return 0;
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}
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static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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struct cinergyt2_fe_state *state = fe->demodulator_priv;
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*ber = le32_to_cpu(state->status.viterbi_error_rate);
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return 0;
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}
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static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
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{
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struct cinergyt2_fe_state *state = fe->demodulator_priv;
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*unc = le32_to_cpu(state->status.uncorrected_block_count);
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return 0;
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}
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static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
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u16 *strength)
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{
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struct cinergyt2_fe_state *state = fe->demodulator_priv;
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*strength = (0xffff - le16_to_cpu(state->status.gain));
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return 0;
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}
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static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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struct cinergyt2_fe_state *state = fe->demodulator_priv;
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*snr = (state->status.snr << 8) | state->status.snr;
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return 0;
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}
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static int cinergyt2_fe_init(struct dvb_frontend *fe)
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{
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return 0;
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}
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static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
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{
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deb_info("cinergyt2_fe_sleep() Called\n");
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return 0;
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}
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static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
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struct dvb_frontend_tune_settings *tune)
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{
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tune->min_delay_ms = 800;
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return 0;
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}
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static int cinergyt2_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 cinergyt2_fe_state *state = fe->demodulator_priv;
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struct dvbt_set_parameters_msg *param;
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int err;
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mutex_lock(&state->data_mutex);
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param = (void *)state->data;
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param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
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param->tps = cpu_to_le16(compute_tps(fep));
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param->freq = cpu_to_le32(fep->frequency / 1000);
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param->flags = 0;
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switch (fep->bandwidth_hz) {
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default:
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case 8000000:
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param->bandwidth = 8;
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break;
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case 7000000:
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param->bandwidth = 7;
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break;
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case 6000000:
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param->bandwidth = 6;
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break;
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}
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err = dvb_usb_generic_rw(state->d, state->data, sizeof(*param),
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state->data, 2, 0);
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if (err < 0)
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err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
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mutex_unlock(&state->data_mutex);
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return (err < 0) ? err : 0;
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}
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static void cinergyt2_fe_release(struct dvb_frontend *fe)
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{
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struct cinergyt2_fe_state *state = fe->demodulator_priv;
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kfree(state);
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}
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static const struct dvb_frontend_ops cinergyt2_fe_ops;
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struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
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{
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struct cinergyt2_fe_state *s = kzalloc(sizeof(
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struct cinergyt2_fe_state), GFP_KERNEL);
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if (s == NULL)
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return NULL;
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s->d = d;
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memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
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s->fe.demodulator_priv = s;
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mutex_init(&s->data_mutex);
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return &s->fe;
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}
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static const struct dvb_frontend_ops cinergyt2_fe_ops = {
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.delsys = { SYS_DVBT },
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.info = {
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.name = DRIVER_NAME,
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.frequency_min_hz = 174 * MHz,
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.frequency_max_hz = 862 * MHz,
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.frequency_stepsize_hz = 166667,
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.caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
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| FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
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| FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
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| FE_CAN_FEC_AUTO | FE_CAN_QPSK
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| FE_CAN_QAM_16 | FE_CAN_QAM_64
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| 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_HIERARCHY_AUTO
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| FE_CAN_RECOVER
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| FE_CAN_MUTE_TS
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},
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.release = cinergyt2_fe_release,
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.init = cinergyt2_fe_init,
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.sleep = cinergyt2_fe_sleep,
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.set_frontend = cinergyt2_fe_set_frontend,
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.get_tune_settings = cinergyt2_fe_get_tune_settings,
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.read_status = cinergyt2_fe_read_status,
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.read_ber = cinergyt2_fe_read_ber,
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.read_signal_strength = cinergyt2_fe_read_signal_strength,
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.read_snr = cinergyt2_fe_read_snr,
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.read_ucblocks = cinergyt2_fe_read_unc_blocks,
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};
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