1 /* 2 * Frontend driver for the GENPIX 8pks/qpsk/DCII USB2.0 DVB-S module 3 * 4 * Copyright (C) 2006,2007 Alan Nisota (alannisota@gmail.com) 5 * Copyright (C) 2006,2007 Genpix Electronics (genpix@genpix-electronics.com) 6 * 7 * Thanks to GENPIX for the sample code used to implement this module. 8 * 9 * This module is based off the vp7045 and vp702x modules 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the Free 13 * Software Foundation, version 2. 14 */ 15 16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 17 18 #include "gp8psk-fe.h" 19 #include <media/dvb_frontend.h> 20 21 static int debug; 22 module_param(debug, int, 0644); 23 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); 24 25 #define dprintk(fmt, arg...) do { \ 26 if (debug) \ 27 printk(KERN_DEBUG pr_fmt("%s: " fmt), \ 28 __func__, ##arg); \ 29 } while (0) 30 31 struct gp8psk_fe_state { 32 struct dvb_frontend fe; 33 void *priv; 34 const struct gp8psk_fe_ops *ops; 35 bool is_rev1; 36 u8 lock; 37 u16 snr; 38 unsigned long next_status_check; 39 unsigned long status_check_interval; 40 }; 41 42 static int gp8psk_tuned_to_DCII(struct dvb_frontend *fe) 43 { 44 struct gp8psk_fe_state *st = fe->demodulator_priv; 45 u8 status; 46 47 st->ops->in(st->priv, GET_8PSK_CONFIG, 0, 0, &status, 1); 48 return status & bmDCtuned; 49 } 50 51 static int gp8psk_set_tuner_mode(struct dvb_frontend *fe, int mode) 52 { 53 struct gp8psk_fe_state *st = fe->demodulator_priv; 54 55 return st->ops->out(st->priv, SET_8PSK_CONFIG, mode, 0, NULL, 0); 56 } 57 58 static int gp8psk_fe_update_status(struct gp8psk_fe_state *st) 59 { 60 u8 buf[6]; 61 if (time_after(jiffies,st->next_status_check)) { 62 st->ops->in(st->priv, GET_SIGNAL_LOCK, 0, 0, &st->lock, 1); 63 st->ops->in(st->priv, GET_SIGNAL_STRENGTH, 0, 0, buf, 6); 64 st->snr = (buf[1]) << 8 | buf[0]; 65 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000; 66 } 67 return 0; 68 } 69 70 static int gp8psk_fe_read_status(struct dvb_frontend *fe, 71 enum fe_status *status) 72 { 73 struct gp8psk_fe_state *st = fe->demodulator_priv; 74 gp8psk_fe_update_status(st); 75 76 if (st->lock) 77 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER; 78 else 79 *status = 0; 80 81 if (*status & FE_HAS_LOCK) 82 st->status_check_interval = 1000; 83 else 84 st->status_check_interval = 100; 85 return 0; 86 } 87 88 /* not supported by this Frontend */ 89 static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber) 90 { 91 (void) fe; 92 *ber = 0; 93 return 0; 94 } 95 96 /* not supported by this Frontend */ 97 static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) 98 { 99 (void) fe; 100 *unc = 0; 101 return 0; 102 } 103 104 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr) 105 { 106 struct gp8psk_fe_state *st = fe->demodulator_priv; 107 gp8psk_fe_update_status(st); 108 /* snr is reported in dBu*256 */ 109 *snr = st->snr; 110 return 0; 111 } 112 113 static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) 114 { 115 struct gp8psk_fe_state *st = fe->demodulator_priv; 116 gp8psk_fe_update_status(st); 117 /* snr is reported in dBu*256 */ 118 /* snr / 38.4 ~= 100% strength */ 119 /* snr * 17 returns 100% strength as 65535 */ 120 if (st->snr > 0xf00) 121 *strength = 0xffff; 122 else 123 *strength = (st->snr << 4) + st->snr; /* snr*17 */ 124 return 0; 125 } 126 127 static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) 128 { 129 tune->min_delay_ms = 800; 130 return 0; 131 } 132 133 static int gp8psk_fe_set_frontend(struct dvb_frontend *fe) 134 { 135 struct gp8psk_fe_state *st = fe->demodulator_priv; 136 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 137 u8 cmd[10]; 138 u32 freq = c->frequency * 1000; 139 140 dprintk("%s()\n", __func__); 141 142 cmd[4] = freq & 0xff; 143 cmd[5] = (freq >> 8) & 0xff; 144 cmd[6] = (freq >> 16) & 0xff; 145 cmd[7] = (freq >> 24) & 0xff; 146 147 /* backwards compatibility: DVB-S + 8-PSK were used for Turbo-FEC */ 148 if (c->delivery_system == SYS_DVBS && c->modulation == PSK_8) 149 c->delivery_system = SYS_TURBO; 150 151 switch (c->delivery_system) { 152 case SYS_DVBS: 153 if (c->modulation != QPSK) { 154 dprintk("%s: unsupported modulation selected (%d)\n", 155 __func__, c->modulation); 156 return -EOPNOTSUPP; 157 } 158 c->fec_inner = FEC_AUTO; 159 break; 160 case SYS_DVBS2: /* kept for backwards compatibility */ 161 dprintk("%s: DVB-S2 delivery system selected\n", __func__); 162 break; 163 case SYS_TURBO: 164 dprintk("%s: Turbo-FEC delivery system selected\n", __func__); 165 break; 166 167 default: 168 dprintk("%s: unsupported delivery system selected (%d)\n", 169 __func__, c->delivery_system); 170 return -EOPNOTSUPP; 171 } 172 173 cmd[0] = c->symbol_rate & 0xff; 174 cmd[1] = (c->symbol_rate >> 8) & 0xff; 175 cmd[2] = (c->symbol_rate >> 16) & 0xff; 176 cmd[3] = (c->symbol_rate >> 24) & 0xff; 177 switch (c->modulation) { 178 case QPSK: 179 if (st->is_rev1) 180 if (gp8psk_tuned_to_DCII(fe)) 181 st->ops->reload(st->priv); 182 switch (c->fec_inner) { 183 case FEC_1_2: 184 cmd[9] = 0; break; 185 case FEC_2_3: 186 cmd[9] = 1; break; 187 case FEC_3_4: 188 cmd[9] = 2; break; 189 case FEC_5_6: 190 cmd[9] = 3; break; 191 case FEC_7_8: 192 cmd[9] = 4; break; 193 case FEC_AUTO: 194 cmd[9] = 5; break; 195 default: 196 cmd[9] = 5; break; 197 } 198 if (c->delivery_system == SYS_TURBO) 199 cmd[8] = ADV_MOD_TURBO_QPSK; 200 else 201 cmd[8] = ADV_MOD_DVB_QPSK; 202 break; 203 case PSK_8: /* PSK_8 is for compatibility with DN */ 204 cmd[8] = ADV_MOD_TURBO_8PSK; 205 switch (c->fec_inner) { 206 case FEC_2_3: 207 cmd[9] = 0; break; 208 case FEC_3_4: 209 cmd[9] = 1; break; 210 case FEC_3_5: 211 cmd[9] = 2; break; 212 case FEC_5_6: 213 cmd[9] = 3; break; 214 case FEC_8_9: 215 cmd[9] = 4; break; 216 default: 217 cmd[9] = 0; break; 218 } 219 break; 220 case QAM_16: /* QAM_16 is for compatibility with DN */ 221 cmd[8] = ADV_MOD_TURBO_16QAM; 222 cmd[9] = 0; 223 break; 224 default: /* Unknown modulation */ 225 dprintk("%s: unsupported modulation selected (%d)\n", 226 __func__, c->modulation); 227 return -EOPNOTSUPP; 228 } 229 230 if (st->is_rev1) 231 gp8psk_set_tuner_mode(fe, 0); 232 st->ops->out(st->priv, TUNE_8PSK, 0, 0, cmd, 10); 233 234 st->lock = 0; 235 st->next_status_check = jiffies; 236 st->status_check_interval = 200; 237 238 return 0; 239 } 240 241 static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe, 242 struct dvb_diseqc_master_cmd *m) 243 { 244 struct gp8psk_fe_state *st = fe->demodulator_priv; 245 246 dprintk("%s\n", __func__); 247 248 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, m->msg[0], 0, 249 m->msg, m->msg_len)) { 250 return -EINVAL; 251 } 252 return 0; 253 } 254 255 static int gp8psk_fe_send_diseqc_burst(struct dvb_frontend *fe, 256 enum fe_sec_mini_cmd burst) 257 { 258 struct gp8psk_fe_state *st = fe->demodulator_priv; 259 u8 cmd; 260 261 dprintk("%s\n", __func__); 262 263 /* These commands are certainly wrong */ 264 cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01; 265 266 if (st->ops->out(st->priv, SEND_DISEQC_COMMAND, cmd, 0, 267 &cmd, 0)) { 268 return -EINVAL; 269 } 270 return 0; 271 } 272 273 static int gp8psk_fe_set_tone(struct dvb_frontend *fe, 274 enum fe_sec_tone_mode tone) 275 { 276 struct gp8psk_fe_state *st = fe->demodulator_priv; 277 278 if (st->ops->out(st->priv, SET_22KHZ_TONE, 279 (tone == SEC_TONE_ON), 0, NULL, 0)) { 280 return -EINVAL; 281 } 282 return 0; 283 } 284 285 static int gp8psk_fe_set_voltage(struct dvb_frontend *fe, 286 enum fe_sec_voltage voltage) 287 { 288 struct gp8psk_fe_state *st = fe->demodulator_priv; 289 290 if (st->ops->out(st->priv, SET_LNB_VOLTAGE, 291 voltage == SEC_VOLTAGE_18, 0, NULL, 0)) { 292 return -EINVAL; 293 } 294 return 0; 295 } 296 297 static int gp8psk_fe_enable_high_lnb_voltage(struct dvb_frontend* fe, long onoff) 298 { 299 struct gp8psk_fe_state *st = fe->demodulator_priv; 300 301 return st->ops->out(st->priv, USE_EXTRA_VOLT, onoff, 0, NULL, 0); 302 } 303 304 static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd) 305 { 306 struct gp8psk_fe_state *st = fe->demodulator_priv; 307 u8 cmd = sw_cmd & 0x7f; 308 309 if (st->ops->out(st->priv, SET_DN_SWITCH, cmd, 0, NULL, 0)) 310 return -EINVAL; 311 312 if (st->ops->out(st->priv, SET_LNB_VOLTAGE, !!(sw_cmd & 0x80), 313 0, NULL, 0)) 314 return -EINVAL; 315 316 return 0; 317 } 318 319 static void gp8psk_fe_release(struct dvb_frontend* fe) 320 { 321 struct gp8psk_fe_state *st = fe->demodulator_priv; 322 323 kfree(st); 324 } 325 326 static const struct dvb_frontend_ops gp8psk_fe_ops; 327 328 struct dvb_frontend *gp8psk_fe_attach(const struct gp8psk_fe_ops *ops, 329 void *priv, bool is_rev1) 330 { 331 struct gp8psk_fe_state *st; 332 333 if (!ops || !ops->in || !ops->out || !ops->reload) { 334 pr_err("Error! gp8psk-fe ops not defined.\n"); 335 return NULL; 336 } 337 338 st = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL); 339 if (!st) 340 return NULL; 341 342 memcpy(&st->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops)); 343 st->fe.demodulator_priv = st; 344 st->ops = ops; 345 st->priv = priv; 346 st->is_rev1 = is_rev1; 347 348 pr_info("Frontend %sattached\n", is_rev1 ? "revision 1 " : ""); 349 350 return &st->fe; 351 } 352 EXPORT_SYMBOL_GPL(gp8psk_fe_attach); 353 354 static const struct dvb_frontend_ops gp8psk_fe_ops = { 355 .delsys = { SYS_DVBS }, 356 .info = { 357 .name = "Genpix DVB-S", 358 .frequency_min = 800000, 359 .frequency_max = 2250000, 360 .frequency_stepsize = 100, 361 .symbol_rate_min = 1000000, 362 .symbol_rate_max = 45000000, 363 .symbol_rate_tolerance = 500, /* ppm */ 364 .caps = FE_CAN_INVERSION_AUTO | 365 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 366 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | 367 /* 368 * FE_CAN_QAM_16 is for compatibility 369 * (Myth incorrectly detects Turbo-QPSK as plain QAM-16) 370 */ 371 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_TURBO_FEC 372 }, 373 374 .release = gp8psk_fe_release, 375 376 .init = NULL, 377 .sleep = NULL, 378 379 .set_frontend = gp8psk_fe_set_frontend, 380 381 .get_tune_settings = gp8psk_fe_get_tune_settings, 382 383 .read_status = gp8psk_fe_read_status, 384 .read_ber = gp8psk_fe_read_ber, 385 .read_signal_strength = gp8psk_fe_read_signal_strength, 386 .read_snr = gp8psk_fe_read_snr, 387 .read_ucblocks = gp8psk_fe_read_unc_blocks, 388 389 .diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg, 390 .diseqc_send_burst = gp8psk_fe_send_diseqc_burst, 391 .set_tone = gp8psk_fe_set_tone, 392 .set_voltage = gp8psk_fe_set_voltage, 393 .dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd, 394 .enable_high_lnb_voltage = gp8psk_fe_enable_high_lnb_voltage 395 }; 396 397 MODULE_AUTHOR("Alan Nisota <alannisota@gamil.com>"); 398 MODULE_DESCRIPTION("Frontend Driver for Genpix DVB-S"); 399 MODULE_VERSION("1.1"); 400 MODULE_LICENSE("GPL"); 401