1/* 2 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter. 3 * 4 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi) 5 * 6 * Based on the dvb-usb-framework code and the 7 * original Terratec Cinergy T2 driver by: 8 * 9 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and 10 * Holger Waechtler <holger@qanu.de> 11 * 12 * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 * 28 */ 29 30#include "cinergyT2.h" 31 32 33/** 34 * convert linux-dvb frontend parameter set into TPS. 35 * See ETSI ETS-300744, section 4.6.2, table 9 for details. 36 * 37 * This function is probably reusable and may better get placed in a support 38 * library. 39 * 40 * We replace errornous fields by default TPS fields (the ones with value 0). 41 */ 42 43static uint16_t compute_tps(struct dvb_frontend_parameters *p) 44{ 45 struct dvb_ofdm_parameters *op = &p->u.ofdm; 46 uint16_t tps = 0; 47 48 switch (op->code_rate_HP) { 49 case FEC_2_3: 50 tps |= (1 << 7); 51 break; 52 case FEC_3_4: 53 tps |= (2 << 7); 54 break; 55 case FEC_5_6: 56 tps |= (3 << 7); 57 break; 58 case FEC_7_8: 59 tps |= (4 << 7); 60 break; 61 case FEC_1_2: 62 case FEC_AUTO: 63 default: 64 /* tps |= (0 << 7) */; 65 } 66 67 switch (op->code_rate_LP) { 68 case FEC_2_3: 69 tps |= (1 << 4); 70 break; 71 case FEC_3_4: 72 tps |= (2 << 4); 73 break; 74 case FEC_5_6: 75 tps |= (3 << 4); 76 break; 77 case FEC_7_8: 78 tps |= (4 << 4); 79 break; 80 case FEC_1_2: 81 case FEC_AUTO: 82 default: 83 /* tps |= (0 << 4) */; 84 } 85 86 switch (op->constellation) { 87 case QAM_16: 88 tps |= (1 << 13); 89 break; 90 case QAM_64: 91 tps |= (2 << 13); 92 break; 93 case QPSK: 94 default: 95 /* tps |= (0 << 13) */; 96 } 97 98 switch (op->transmission_mode) { 99 case TRANSMISSION_MODE_8K: 100 tps |= (1 << 0); 101 break; 102 case TRANSMISSION_MODE_2K: 103 default: 104 /* tps |= (0 << 0) */; 105 } 106 107 switch (op->guard_interval) { 108 case GUARD_INTERVAL_1_16: 109 tps |= (1 << 2); 110 break; 111 case GUARD_INTERVAL_1_8: 112 tps |= (2 << 2); 113 break; 114 case GUARD_INTERVAL_1_4: 115 tps |= (3 << 2); 116 break; 117 case GUARD_INTERVAL_1_32: 118 default: 119 /* tps |= (0 << 2) */; 120 } 121 122 switch (op->hierarchy_information) { 123 case HIERARCHY_1: 124 tps |= (1 << 10); 125 break; 126 case HIERARCHY_2: 127 tps |= (2 << 10); 128 break; 129 case HIERARCHY_4: 130 tps |= (3 << 10); 131 break; 132 case HIERARCHY_NONE: 133 default: 134 /* tps |= (0 << 10) */; 135 } 136 137 return tps; 138} 139 140struct cinergyt2_fe_state { 141 struct dvb_frontend fe; 142 struct dvb_usb_device *d; 143}; 144 145static int cinergyt2_fe_read_status(struct dvb_frontend *fe, 146 fe_status_t *status) 147{ 148 struct cinergyt2_fe_state *state = fe->demodulator_priv; 149 struct dvbt_get_status_msg result; 150 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS }; 151 int ret; 152 153 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result, 154 sizeof(result), 0); 155 if (ret < 0) 156 return ret; 157 158 *status = 0; 159 160 if (0xffff - le16_to_cpu(result.gain) > 30) 161 *status |= FE_HAS_SIGNAL; 162 if (result.lock_bits & (1 << 6)) 163 *status |= FE_HAS_LOCK; 164 if (result.lock_bits & (1 << 5)) 165 *status |= FE_HAS_SYNC; 166 if (result.lock_bits & (1 << 4)) 167 *status |= FE_HAS_CARRIER; 168 if (result.lock_bits & (1 << 1)) 169 *status |= FE_HAS_VITERBI; 170 171 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != 172 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) 173 *status &= ~FE_HAS_LOCK; 174 175 return 0; 176} 177 178static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber) 179{ 180 struct cinergyt2_fe_state *state = fe->demodulator_priv; 181 struct dvbt_get_status_msg status; 182 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS }; 183 int ret; 184 185 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status, 186 sizeof(status), 0); 187 if (ret < 0) 188 return ret; 189 190 *ber = le32_to_cpu(status.viterbi_error_rate); 191 return 0; 192} 193 194static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc) 195{ 196 struct cinergyt2_fe_state *state = fe->demodulator_priv; 197 struct dvbt_get_status_msg status; 198 u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS }; 199 int ret; 200 201 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status, 202 sizeof(status), 0); 203 if (ret < 0) { 204 err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n", 205 ret); 206 return ret; 207 } 208 *unc = le32_to_cpu(status.uncorrected_block_count); 209 return 0; 210} 211 212static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe, 213 u16 *strength) 214{ 215 struct cinergyt2_fe_state *state = fe->demodulator_priv; 216 struct dvbt_get_status_msg status; 217 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS }; 218 int ret; 219 220 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status, 221 sizeof(status), 0); 222 if (ret < 0) { 223 err("cinergyt2_fe_read_signal_strength() Failed!" 224 " (Error=%d)\n", ret); 225 return ret; 226 } 227 *strength = (0xffff - le16_to_cpu(status.gain)); 228 return 0; 229} 230 231static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr) 232{ 233 struct cinergyt2_fe_state *state = fe->demodulator_priv; 234 struct dvbt_get_status_msg status; 235 char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS }; 236 int ret; 237 238 ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status, 239 sizeof(status), 0); 240 if (ret < 0) { 241 err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret); 242 return ret; 243 } 244 *snr = (status.snr << 8) | status.snr; 245 return 0; 246} 247 248static int cinergyt2_fe_init(struct dvb_frontend *fe) 249{ 250 return 0; 251} 252 253static int cinergyt2_fe_sleep(struct dvb_frontend *fe) 254{ 255 deb_info("cinergyt2_fe_sleep() Called\n"); 256 return 0; 257} 258 259static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe, 260 struct dvb_frontend_tune_settings *tune) 261{ 262 tune->min_delay_ms = 800; 263 return 0; 264} 265 266static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe, 267 struct dvb_frontend_parameters *fep) 268{ 269 struct cinergyt2_fe_state *state = fe->demodulator_priv; 270 struct dvbt_set_parameters_msg param; 271 char result[2]; 272 int err; 273 274 param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS; 275 param.tps = cpu_to_le16(compute_tps(fep)); 276 param.freq = cpu_to_le32(fep->frequency / 1000); 277 param.bandwidth = 8 - fep->u.ofdm.bandwidth - BANDWIDTH_8_MHZ; 278 param.flags = 0; 279 280 err = dvb_usb_generic_rw(state->d, 281 (char *)¶m, sizeof(param), 282 result, sizeof(result), 0); 283 if (err < 0) 284 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err); 285 286 return (err < 0) ? err : 0; 287} 288 289static int cinergyt2_fe_get_frontend(struct dvb_frontend *fe, 290 struct dvb_frontend_parameters *fep) 291{ 292 return 0; 293} 294 295static void cinergyt2_fe_release(struct dvb_frontend *fe) 296{ 297 struct cinergyt2_fe_state *state = fe->demodulator_priv; 298 if (state != NULL) 299 kfree(state); 300} 301 302static struct dvb_frontend_ops cinergyt2_fe_ops; 303 304struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d) 305{ 306 struct cinergyt2_fe_state *s = kzalloc(sizeof( 307 struct cinergyt2_fe_state), GFP_KERNEL); 308 if (s == NULL) 309 return NULL; 310 311 s->d = d; 312 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops)); 313 s->fe.demodulator_priv = s; 314 return &s->fe; 315} 316 317 318static struct dvb_frontend_ops cinergyt2_fe_ops = { 319 .info = { 320 .name = DRIVER_NAME, 321 .type = FE_OFDM, 322 .frequency_min = 174000000, 323 .frequency_max = 862000000, 324 .frequency_stepsize = 166667, 325 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 326 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 327 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 328 | FE_CAN_FEC_AUTO | FE_CAN_QPSK 329 | FE_CAN_QAM_16 | FE_CAN_QAM_64 330 | FE_CAN_QAM_AUTO 331 | FE_CAN_TRANSMISSION_MODE_AUTO 332 | FE_CAN_GUARD_INTERVAL_AUTO 333 | FE_CAN_HIERARCHY_AUTO 334 | FE_CAN_RECOVER 335 | FE_CAN_MUTE_TS 336 }, 337 338 .release = cinergyt2_fe_release, 339 340 .init = cinergyt2_fe_init, 341 .sleep = cinergyt2_fe_sleep, 342 343 .set_frontend = cinergyt2_fe_set_frontend, 344 .get_frontend = cinergyt2_fe_get_frontend, 345 .get_tune_settings = cinergyt2_fe_get_tune_settings, 346 347 .read_status = cinergyt2_fe_read_status, 348 .read_ber = cinergyt2_fe_read_ber, 349 .read_signal_strength = cinergyt2_fe_read_signal_strength, 350 .read_snr = cinergyt2_fe_read_snr, 351 .read_ucblocks = cinergyt2_fe_read_unc_blocks, 352}; 353