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 */ 25 26 #include "cinergyT2.h" 27 28 29 /** 30 * convert linux-dvb frontend parameter set into TPS. 31 * See ETSI ETS-300744, section 4.6.2, table 9 for details. 32 * 33 * This function is probably reusable and may better get placed in a support 34 * library. 35 * 36 * We replace errornous fields by default TPS fields (the ones with value 0). 37 */ 38 39 static uint16_t compute_tps(struct dtv_frontend_properties *op) 40 { 41 uint16_t tps = 0; 42 43 switch (op->code_rate_HP) { 44 case FEC_2_3: 45 tps |= (1 << 7); 46 break; 47 case FEC_3_4: 48 tps |= (2 << 7); 49 break; 50 case FEC_5_6: 51 tps |= (3 << 7); 52 break; 53 case FEC_7_8: 54 tps |= (4 << 7); 55 break; 56 case FEC_1_2: 57 case FEC_AUTO: 58 default: 59 /* tps |= (0 << 7) */; 60 } 61 62 switch (op->code_rate_LP) { 63 case FEC_2_3: 64 tps |= (1 << 4); 65 break; 66 case FEC_3_4: 67 tps |= (2 << 4); 68 break; 69 case FEC_5_6: 70 tps |= (3 << 4); 71 break; 72 case FEC_7_8: 73 tps |= (4 << 4); 74 break; 75 case FEC_1_2: 76 case FEC_AUTO: 77 default: 78 /* tps |= (0 << 4) */; 79 } 80 81 switch (op->modulation) { 82 case QAM_16: 83 tps |= (1 << 13); 84 break; 85 case QAM_64: 86 tps |= (2 << 13); 87 break; 88 case QPSK: 89 default: 90 /* tps |= (0 << 13) */; 91 } 92 93 switch (op->transmission_mode) { 94 case TRANSMISSION_MODE_8K: 95 tps |= (1 << 0); 96 break; 97 case TRANSMISSION_MODE_2K: 98 default: 99 /* tps |= (0 << 0) */; 100 } 101 102 switch (op->guard_interval) { 103 case GUARD_INTERVAL_1_16: 104 tps |= (1 << 2); 105 break; 106 case GUARD_INTERVAL_1_8: 107 tps |= (2 << 2); 108 break; 109 case GUARD_INTERVAL_1_4: 110 tps |= (3 << 2); 111 break; 112 case GUARD_INTERVAL_1_32: 113 default: 114 /* tps |= (0 << 2) */; 115 } 116 117 switch (op->hierarchy) { 118 case HIERARCHY_1: 119 tps |= (1 << 10); 120 break; 121 case HIERARCHY_2: 122 tps |= (2 << 10); 123 break; 124 case HIERARCHY_4: 125 tps |= (3 << 10); 126 break; 127 case HIERARCHY_NONE: 128 default: 129 /* tps |= (0 << 10) */; 130 } 131 132 return tps; 133 } 134 135 struct cinergyt2_fe_state { 136 struct dvb_frontend fe; 137 struct dvb_usb_device *d; 138 139 unsigned char data[64]; 140 struct mutex data_mutex; 141 142 struct dvbt_get_status_msg status; 143 }; 144 145 static int cinergyt2_fe_read_status(struct dvb_frontend *fe, 146 enum fe_status *status) 147 { 148 struct cinergyt2_fe_state *state = fe->demodulator_priv; 149 int ret; 150 151 mutex_lock(&state->data_mutex); 152 state->data[0] = CINERGYT2_EP1_GET_TUNER_STATUS; 153 154 ret = dvb_usb_generic_rw(state->d, state->data, 1, 155 state->data, sizeof(state->status), 0); 156 if (!ret) 157 memcpy(&state->status, state->data, sizeof(state->status)); 158 mutex_unlock(&state->data_mutex); 159 160 if (ret < 0) 161 return ret; 162 163 *status = 0; 164 165 if (0xffff - le16_to_cpu(state->status.gain) > 30) 166 *status |= FE_HAS_SIGNAL; 167 if (state->status.lock_bits & (1 << 6)) 168 *status |= FE_HAS_LOCK; 169 if (state->status.lock_bits & (1 << 5)) 170 *status |= FE_HAS_SYNC; 171 if (state->status.lock_bits & (1 << 4)) 172 *status |= FE_HAS_CARRIER; 173 if (state->status.lock_bits & (1 << 1)) 174 *status |= FE_HAS_VITERBI; 175 176 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != 177 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) 178 *status &= ~FE_HAS_LOCK; 179 180 return 0; 181 } 182 183 static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber) 184 { 185 struct cinergyt2_fe_state *state = fe->demodulator_priv; 186 187 *ber = le32_to_cpu(state->status.viterbi_error_rate); 188 return 0; 189 } 190 191 static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc) 192 { 193 struct cinergyt2_fe_state *state = fe->demodulator_priv; 194 195 *unc = le32_to_cpu(state->status.uncorrected_block_count); 196 return 0; 197 } 198 199 static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe, 200 u16 *strength) 201 { 202 struct cinergyt2_fe_state *state = fe->demodulator_priv; 203 204 *strength = (0xffff - le16_to_cpu(state->status.gain)); 205 return 0; 206 } 207 208 static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr) 209 { 210 struct cinergyt2_fe_state *state = fe->demodulator_priv; 211 212 *snr = (state->status.snr << 8) | state->status.snr; 213 return 0; 214 } 215 216 static int cinergyt2_fe_init(struct dvb_frontend *fe) 217 { 218 return 0; 219 } 220 221 static int cinergyt2_fe_sleep(struct dvb_frontend *fe) 222 { 223 deb_info("cinergyt2_fe_sleep() Called\n"); 224 return 0; 225 } 226 227 static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe, 228 struct dvb_frontend_tune_settings *tune) 229 { 230 tune->min_delay_ms = 800; 231 return 0; 232 } 233 234 static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe) 235 { 236 struct dtv_frontend_properties *fep = &fe->dtv_property_cache; 237 struct cinergyt2_fe_state *state = fe->demodulator_priv; 238 struct dvbt_set_parameters_msg *param; 239 int err; 240 241 mutex_lock(&state->data_mutex); 242 243 param = (void *)state->data; 244 param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS; 245 param->tps = cpu_to_le16(compute_tps(fep)); 246 param->freq = cpu_to_le32(fep->frequency / 1000); 247 param->flags = 0; 248 249 switch (fep->bandwidth_hz) { 250 default: 251 case 8000000: 252 param->bandwidth = 8; 253 break; 254 case 7000000: 255 param->bandwidth = 7; 256 break; 257 case 6000000: 258 param->bandwidth = 6; 259 break; 260 } 261 262 err = dvb_usb_generic_rw(state->d, state->data, sizeof(*param), 263 state->data, 2, 0); 264 if (err < 0) 265 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err); 266 267 mutex_unlock(&state->data_mutex); 268 return (err < 0) ? err : 0; 269 } 270 271 static void cinergyt2_fe_release(struct dvb_frontend *fe) 272 { 273 struct cinergyt2_fe_state *state = fe->demodulator_priv; 274 kfree(state); 275 } 276 277 static const struct dvb_frontend_ops cinergyt2_fe_ops; 278 279 struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d) 280 { 281 struct cinergyt2_fe_state *s = kzalloc(sizeof( 282 struct cinergyt2_fe_state), GFP_KERNEL); 283 if (s == NULL) 284 return NULL; 285 286 s->d = d; 287 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops)); 288 s->fe.demodulator_priv = s; 289 mutex_init(&s->data_mutex); 290 return &s->fe; 291 } 292 293 294 static const struct dvb_frontend_ops cinergyt2_fe_ops = { 295 .delsys = { SYS_DVBT }, 296 .info = { 297 .name = DRIVER_NAME, 298 .frequency_min = 174000000, 299 .frequency_max = 862000000, 300 .frequency_stepsize = 166667, 301 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 302 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 303 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 304 | FE_CAN_FEC_AUTO | FE_CAN_QPSK 305 | FE_CAN_QAM_16 | FE_CAN_QAM_64 306 | FE_CAN_QAM_AUTO 307 | FE_CAN_TRANSMISSION_MODE_AUTO 308 | FE_CAN_GUARD_INTERVAL_AUTO 309 | FE_CAN_HIERARCHY_AUTO 310 | FE_CAN_RECOVER 311 | FE_CAN_MUTE_TS 312 }, 313 314 .release = cinergyt2_fe_release, 315 316 .init = cinergyt2_fe_init, 317 .sleep = cinergyt2_fe_sleep, 318 319 .set_frontend = cinergyt2_fe_set_frontend, 320 .get_tune_settings = cinergyt2_fe_get_tune_settings, 321 322 .read_status = cinergyt2_fe_read_status, 323 .read_ber = cinergyt2_fe_read_ber, 324 .read_signal_strength = cinergyt2_fe_read_signal_strength, 325 .read_snr = cinergyt2_fe_read_snr, 326 .read_ucblocks = cinergyt2_fe_read_unc_blocks, 327 }; 328