diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/cinergyT2-fe.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/cinergyT2-fe.c | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/cinergyT2-fe.c b/drivers/media/dvb/dvb-usb/cinergyT2-fe.c new file mode 100644 index 000000000000..649f25cca49e --- /dev/null +++ b/drivers/media/dvb/dvb-usb/cinergyT2-fe.c @@ -0,0 +1,351 @@ +/* + * 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 dvb_frontend_parameters *p) +{ + struct dvb_ofdm_parameters *op = &p->u.ofdm; + 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->constellation) { + 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_information) { + 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 dvb_frontend_parameters *fep) +{ + 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.bandwidth = 8 - fep->u.ofdm.bandwidth - BANDWIDTH_8_MHZ; + + 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 int cinergyt2_fe_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *fep) +{ + return 0; +} + +static void cinergyt2_fe_release(struct dvb_frontend *fe) +{ + struct cinergyt2_fe_state *state = fe->demodulator_priv; + if (state != NULL) + 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 = { + .info = { + .name = DRIVER_NAME, + .type = FE_OFDM, + .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_frontend = cinergyt2_fe_get_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, +}; |