1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter. 4 * 5 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi) 6 * 7 * Based on the dvb-usb-framework code and the 8 * original Terratec Cinergy T2 driver by: 9 * 10 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and 11 * Holger Waechtler <holger@qanu.de> 12 * 13 * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf 14 */ 15 16 #include "cinergyT2.h" 17 18 19 /* 20 * convert linux-dvb frontend parameter set into TPS. 21 * See ETSI ETS-300744, section 4.6.2, table 9 for details. 22 * 23 * This function is probably reusable and may better get placed in a support 24 * library. 25 * 26 * We replace erroneous fields by default TPS fields (the ones with value 0). 27 */ 28 29 static uint16_t compute_tps(struct dtv_frontend_properties *op) 30 { 31 uint16_t tps = 0; 32 33 switch (op->code_rate_HP) { 34 case FEC_2_3: 35 tps |= (1 << 7); 36 break; 37 case FEC_3_4: 38 tps |= (2 << 7); 39 break; 40 case FEC_5_6: 41 tps |= (3 << 7); 42 break; 43 case FEC_7_8: 44 tps |= (4 << 7); 45 break; 46 case FEC_1_2: 47 case FEC_AUTO: 48 default: 49 /* tps |= (0 << 7) */; 50 } 51 52 switch (op->code_rate_LP) { 53 case FEC_2_3: 54 tps |= (1 << 4); 55 break; 56 case FEC_3_4: 57 tps |= (2 << 4); 58 break; 59 case FEC_5_6: 60 tps |= (3 << 4); 61 break; 62 case FEC_7_8: 63 tps |= (4 << 4); 64 break; 65 case FEC_1_2: 66 case FEC_AUTO: 67 default: 68 /* tps |= (0 << 4) */; 69 } 70 71 switch (op->modulation) { 72 case QAM_16: 73 tps |= (1 << 13); 74 break; 75 case QAM_64: 76 tps |= (2 << 13); 77 break; 78 case QPSK: 79 default: 80 /* tps |= (0 << 13) */; 81 } 82 83 switch (op->transmission_mode) { 84 case TRANSMISSION_MODE_8K: 85 tps |= (1 << 0); 86 break; 87 case TRANSMISSION_MODE_2K: 88 default: 89 /* tps |= (0 << 0) */; 90 } 91 92 switch (op->guard_interval) { 93 case GUARD_INTERVAL_1_16: 94 tps |= (1 << 2); 95 break; 96 case GUARD_INTERVAL_1_8: 97 tps |= (2 << 2); 98 break; 99 case GUARD_INTERVAL_1_4: 100 tps |= (3 << 2); 101 break; 102 case GUARD_INTERVAL_1_32: 103 default: 104 /* tps |= (0 << 2) */; 105 } 106 107 switch (op->hierarchy) { 108 case HIERARCHY_1: 109 tps |= (1 << 10); 110 break; 111 case HIERARCHY_2: 112 tps |= (2 << 10); 113 break; 114 case HIERARCHY_4: 115 tps |= (3 << 10); 116 break; 117 case HIERARCHY_NONE: 118 default: 119 /* tps |= (0 << 10) */; 120 } 121 122 return tps; 123 } 124 125 struct cinergyt2_fe_state { 126 struct dvb_frontend fe; 127 struct dvb_usb_device *d; 128 129 unsigned char data[64]; 130 struct mutex data_mutex; 131 132 struct dvbt_get_status_msg status; 133 }; 134 135 static int cinergyt2_fe_read_status(struct dvb_frontend *fe, 136 enum fe_status *status) 137 { 138 struct cinergyt2_fe_state *state = fe->demodulator_priv; 139 int ret; 140 141 mutex_lock(&state->data_mutex); 142 state->data[0] = CINERGYT2_EP1_GET_TUNER_STATUS; 143 144 ret = dvb_usb_generic_rw(state->d, state->data, 1, 145 state->data, sizeof(state->status), 0); 146 if (!ret) 147 memcpy(&state->status, state->data, sizeof(state->status)); 148 mutex_unlock(&state->data_mutex); 149 150 if (ret < 0) 151 return ret; 152 153 *status = 0; 154 155 if (0xffff - le16_to_cpu(state->status.gain) > 30) 156 *status |= FE_HAS_SIGNAL; 157 if (state->status.lock_bits & (1 << 6)) 158 *status |= FE_HAS_LOCK; 159 if (state->status.lock_bits & (1 << 5)) 160 *status |= FE_HAS_SYNC; 161 if (state->status.lock_bits & (1 << 4)) 162 *status |= FE_HAS_CARRIER; 163 if (state->status.lock_bits & (1 << 1)) 164 *status |= FE_HAS_VITERBI; 165 166 if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != 167 (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) 168 *status &= ~FE_HAS_LOCK; 169 170 return 0; 171 } 172 173 static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber) 174 { 175 struct cinergyt2_fe_state *state = fe->demodulator_priv; 176 177 *ber = le32_to_cpu(state->status.viterbi_error_rate); 178 return 0; 179 } 180 181 static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc) 182 { 183 struct cinergyt2_fe_state *state = fe->demodulator_priv; 184 185 *unc = le32_to_cpu(state->status.uncorrected_block_count); 186 return 0; 187 } 188 189 static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe, 190 u16 *strength) 191 { 192 struct cinergyt2_fe_state *state = fe->demodulator_priv; 193 194 *strength = (0xffff - le16_to_cpu(state->status.gain)); 195 return 0; 196 } 197 198 static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr) 199 { 200 struct cinergyt2_fe_state *state = fe->demodulator_priv; 201 202 *snr = (state->status.snr << 8) | state->status.snr; 203 return 0; 204 } 205 206 static int cinergyt2_fe_init(struct dvb_frontend *fe) 207 { 208 return 0; 209 } 210 211 static int cinergyt2_fe_sleep(struct dvb_frontend *fe) 212 { 213 deb_info("cinergyt2_fe_sleep() Called\n"); 214 return 0; 215 } 216 217 static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe, 218 struct dvb_frontend_tune_settings *tune) 219 { 220 tune->min_delay_ms = 800; 221 return 0; 222 } 223 224 static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe) 225 { 226 struct dtv_frontend_properties *fep = &fe->dtv_property_cache; 227 struct cinergyt2_fe_state *state = fe->demodulator_priv; 228 struct dvbt_set_parameters_msg *param; 229 int err; 230 231 mutex_lock(&state->data_mutex); 232 233 param = (void *)state->data; 234 param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS; 235 param->tps = cpu_to_le16(compute_tps(fep)); 236 param->freq = cpu_to_le32(fep->frequency / 1000); 237 param->flags = 0; 238 239 switch (fep->bandwidth_hz) { 240 default: 241 case 8000000: 242 param->bandwidth = 8; 243 break; 244 case 7000000: 245 param->bandwidth = 7; 246 break; 247 case 6000000: 248 param->bandwidth = 6; 249 break; 250 } 251 252 err = dvb_usb_generic_rw(state->d, state->data, sizeof(*param), 253 state->data, 2, 0); 254 if (err < 0) 255 err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err); 256 257 mutex_unlock(&state->data_mutex); 258 return (err < 0) ? err : 0; 259 } 260 261 static void cinergyt2_fe_release(struct dvb_frontend *fe) 262 { 263 struct cinergyt2_fe_state *state = fe->demodulator_priv; 264 kfree(state); 265 } 266 267 static const struct dvb_frontend_ops cinergyt2_fe_ops; 268 269 struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d) 270 { 271 struct cinergyt2_fe_state *s = kzalloc(sizeof( 272 struct cinergyt2_fe_state), GFP_KERNEL); 273 if (s == NULL) 274 return NULL; 275 276 s->d = d; 277 memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops)); 278 s->fe.demodulator_priv = s; 279 mutex_init(&s->data_mutex); 280 return &s->fe; 281 } 282 283 284 static const struct dvb_frontend_ops cinergyt2_fe_ops = { 285 .delsys = { SYS_DVBT }, 286 .info = { 287 .name = DRIVER_NAME, 288 .frequency_min_hz = 174 * MHz, 289 .frequency_max_hz = 862 * MHz, 290 .frequency_stepsize_hz = 166667, 291 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 292 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 293 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 294 | FE_CAN_FEC_AUTO | FE_CAN_QPSK 295 | FE_CAN_QAM_16 | FE_CAN_QAM_64 296 | FE_CAN_QAM_AUTO 297 | FE_CAN_TRANSMISSION_MODE_AUTO 298 | FE_CAN_GUARD_INTERVAL_AUTO 299 | FE_CAN_HIERARCHY_AUTO 300 | FE_CAN_RECOVER 301 | FE_CAN_MUTE_TS 302 }, 303 304 .release = cinergyt2_fe_release, 305 306 .init = cinergyt2_fe_init, 307 .sleep = cinergyt2_fe_sleep, 308 309 .set_frontend = cinergyt2_fe_set_frontend, 310 .get_tune_settings = cinergyt2_fe_get_tune_settings, 311 312 .read_status = cinergyt2_fe_read_status, 313 .read_ber = cinergyt2_fe_read_ber, 314 .read_signal_strength = cinergyt2_fe_read_signal_strength, 315 .read_snr = cinergyt2_fe_read_snr, 316 .read_ucblocks = cinergyt2_fe_read_unc_blocks, 317 }; 318