1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 Auvitek AU8522 QAM/8VSB demodulator driver 4 5 Copyright (C) 2008 Steven Toth <stoth@linuxtv.org> 6 7 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/init.h> 12 #include <linux/module.h> 13 #include <linux/string.h> 14 #include <linux/delay.h> 15 #include <media/dvb_frontend.h> 16 #include "au8522.h" 17 #include "au8522_priv.h" 18 19 static int debug; 20 static int zv_mode = 1; /* default to on */ 21 22 #define dprintk(arg...)\ 23 do { if (debug)\ 24 printk(arg);\ 25 } while (0) 26 27 struct mse2snr_tab { 28 u16 val; 29 u16 data; 30 }; 31 32 /* VSB SNR lookup table */ 33 static struct mse2snr_tab vsb_mse2snr_tab[] = { 34 { 0, 270 }, 35 { 2, 250 }, 36 { 3, 240 }, 37 { 5, 230 }, 38 { 7, 220 }, 39 { 9, 210 }, 40 { 12, 200 }, 41 { 13, 195 }, 42 { 15, 190 }, 43 { 17, 185 }, 44 { 19, 180 }, 45 { 21, 175 }, 46 { 24, 170 }, 47 { 27, 165 }, 48 { 31, 160 }, 49 { 32, 158 }, 50 { 33, 156 }, 51 { 36, 152 }, 52 { 37, 150 }, 53 { 39, 148 }, 54 { 40, 146 }, 55 { 41, 144 }, 56 { 43, 142 }, 57 { 44, 140 }, 58 { 48, 135 }, 59 { 50, 130 }, 60 { 43, 142 }, 61 { 53, 125 }, 62 { 56, 120 }, 63 { 256, 115 }, 64 }; 65 66 /* QAM64 SNR lookup table */ 67 static struct mse2snr_tab qam64_mse2snr_tab[] = { 68 { 15, 0 }, 69 { 16, 290 }, 70 { 17, 288 }, 71 { 18, 286 }, 72 { 19, 284 }, 73 { 20, 282 }, 74 { 21, 281 }, 75 { 22, 279 }, 76 { 23, 277 }, 77 { 24, 275 }, 78 { 25, 273 }, 79 { 26, 271 }, 80 { 27, 269 }, 81 { 28, 268 }, 82 { 29, 266 }, 83 { 30, 264 }, 84 { 31, 262 }, 85 { 32, 260 }, 86 { 33, 259 }, 87 { 34, 258 }, 88 { 35, 256 }, 89 { 36, 255 }, 90 { 37, 254 }, 91 { 38, 252 }, 92 { 39, 251 }, 93 { 40, 250 }, 94 { 41, 249 }, 95 { 42, 248 }, 96 { 43, 246 }, 97 { 44, 245 }, 98 { 45, 244 }, 99 { 46, 242 }, 100 { 47, 241 }, 101 { 48, 240 }, 102 { 50, 239 }, 103 { 51, 238 }, 104 { 53, 237 }, 105 { 54, 236 }, 106 { 56, 235 }, 107 { 57, 234 }, 108 { 59, 233 }, 109 { 60, 232 }, 110 { 62, 231 }, 111 { 63, 230 }, 112 { 65, 229 }, 113 { 67, 228 }, 114 { 68, 227 }, 115 { 70, 226 }, 116 { 71, 225 }, 117 { 73, 224 }, 118 { 74, 223 }, 119 { 76, 222 }, 120 { 78, 221 }, 121 { 80, 220 }, 122 { 82, 219 }, 123 { 85, 218 }, 124 { 88, 217 }, 125 { 90, 216 }, 126 { 92, 215 }, 127 { 93, 214 }, 128 { 94, 212 }, 129 { 95, 211 }, 130 { 97, 210 }, 131 { 99, 209 }, 132 { 101, 208 }, 133 { 102, 207 }, 134 { 104, 206 }, 135 { 107, 205 }, 136 { 111, 204 }, 137 { 114, 203 }, 138 { 118, 202 }, 139 { 122, 201 }, 140 { 125, 200 }, 141 { 128, 199 }, 142 { 130, 198 }, 143 { 132, 197 }, 144 { 256, 190 }, 145 }; 146 147 /* QAM256 SNR lookup table */ 148 static struct mse2snr_tab qam256_mse2snr_tab[] = { 149 { 15, 0 }, 150 { 16, 400 }, 151 { 17, 398 }, 152 { 18, 396 }, 153 { 19, 394 }, 154 { 20, 392 }, 155 { 21, 390 }, 156 { 22, 388 }, 157 { 23, 386 }, 158 { 24, 384 }, 159 { 25, 382 }, 160 { 26, 380 }, 161 { 27, 379 }, 162 { 28, 378 }, 163 { 29, 377 }, 164 { 30, 376 }, 165 { 31, 375 }, 166 { 32, 374 }, 167 { 33, 373 }, 168 { 34, 372 }, 169 { 35, 371 }, 170 { 36, 370 }, 171 { 37, 362 }, 172 { 38, 354 }, 173 { 39, 346 }, 174 { 40, 338 }, 175 { 41, 330 }, 176 { 42, 328 }, 177 { 43, 326 }, 178 { 44, 324 }, 179 { 45, 322 }, 180 { 46, 320 }, 181 { 47, 319 }, 182 { 48, 318 }, 183 { 49, 317 }, 184 { 50, 316 }, 185 { 51, 315 }, 186 { 52, 314 }, 187 { 53, 313 }, 188 { 54, 312 }, 189 { 55, 311 }, 190 { 56, 310 }, 191 { 57, 308 }, 192 { 58, 306 }, 193 { 59, 304 }, 194 { 60, 302 }, 195 { 61, 300 }, 196 { 62, 298 }, 197 { 65, 295 }, 198 { 68, 294 }, 199 { 70, 293 }, 200 { 73, 292 }, 201 { 76, 291 }, 202 { 78, 290 }, 203 { 79, 289 }, 204 { 81, 288 }, 205 { 82, 287 }, 206 { 83, 286 }, 207 { 84, 285 }, 208 { 85, 284 }, 209 { 86, 283 }, 210 { 88, 282 }, 211 { 89, 281 }, 212 { 256, 280 }, 213 }; 214 215 static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, 216 u16 *snr) 217 { 218 int i, ret = -EINVAL; 219 dprintk("%s()\n", __func__); 220 221 for (i = 0; i < sz; i++) { 222 if (mse < tab[i].val) { 223 *snr = tab[i].data; 224 ret = 0; 225 break; 226 } 227 } 228 dprintk("%s() snr=%d\n", __func__, *snr); 229 return ret; 230 } 231 232 static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq) 233 { 234 struct au8522_state *state = fe->demodulator_priv; 235 u8 r0b5, r0b6, r0b7; 236 char *ifmhz; 237 238 switch (if_freq) { 239 case AU8522_IF_3_25MHZ: 240 ifmhz = "3.25"; 241 r0b5 = 0x00; 242 r0b6 = 0x3d; 243 r0b7 = 0xa0; 244 break; 245 case AU8522_IF_4MHZ: 246 ifmhz = "4.00"; 247 r0b5 = 0x00; 248 r0b6 = 0x4b; 249 r0b7 = 0xd9; 250 break; 251 case AU8522_IF_6MHZ: 252 ifmhz = "6.00"; 253 r0b5 = 0xfb; 254 r0b6 = 0x8e; 255 r0b7 = 0x39; 256 break; 257 default: 258 dprintk("%s() IF Frequency not supported\n", __func__); 259 return -EINVAL; 260 } 261 dprintk("%s() %s MHz\n", __func__, ifmhz); 262 au8522_writereg(state, 0x00b5, r0b5); 263 au8522_writereg(state, 0x00b6, r0b6); 264 au8522_writereg(state, 0x00b7, r0b7); 265 266 return 0; 267 } 268 269 /* VSB Modulation table */ 270 static struct { 271 u16 reg; 272 u16 data; 273 } VSB_mod_tab[] = { 274 { 0x0090, 0x84 }, 275 { 0x2005, 0x00 }, 276 { 0x0091, 0x80 }, 277 { 0x00a3, 0x0c }, 278 { 0x00a4, 0xe8 }, 279 { 0x0081, 0xc4 }, 280 { 0x00a5, 0x40 }, 281 { 0x00a7, 0x40 }, 282 { 0x00a6, 0x67 }, 283 { 0x0262, 0x20 }, 284 { 0x021c, 0x30 }, 285 { 0x00d8, 0x1a }, 286 { 0x0227, 0xa0 }, 287 { 0x0121, 0xff }, 288 { 0x00a8, 0xf0 }, 289 { 0x00a9, 0x05 }, 290 { 0x00aa, 0x77 }, 291 { 0x00ab, 0xf0 }, 292 { 0x00ac, 0x05 }, 293 { 0x00ad, 0x77 }, 294 { 0x00ae, 0x41 }, 295 { 0x00af, 0x66 }, 296 { 0x021b, 0xcc }, 297 { 0x021d, 0x80 }, 298 { 0x00a4, 0xe8 }, 299 { 0x0231, 0x13 }, 300 }; 301 302 /* QAM64 Modulation table */ 303 static struct { 304 u16 reg; 305 u16 data; 306 } QAM64_mod_tab[] = { 307 { 0x00a3, 0x09 }, 308 { 0x00a4, 0x00 }, 309 { 0x0081, 0xc4 }, 310 { 0x00a5, 0x40 }, 311 { 0x00aa, 0x77 }, 312 { 0x00ad, 0x77 }, 313 { 0x00a6, 0x67 }, 314 { 0x0262, 0x20 }, 315 { 0x021c, 0x30 }, 316 { 0x00b8, 0x3e }, 317 { 0x00b9, 0xf0 }, 318 { 0x00ba, 0x01 }, 319 { 0x00bb, 0x18 }, 320 { 0x00bc, 0x50 }, 321 { 0x00bd, 0x00 }, 322 { 0x00be, 0xea }, 323 { 0x00bf, 0xef }, 324 { 0x00c0, 0xfc }, 325 { 0x00c1, 0xbd }, 326 { 0x00c2, 0x1f }, 327 { 0x00c3, 0xfc }, 328 { 0x00c4, 0xdd }, 329 { 0x00c5, 0xaf }, 330 { 0x00c6, 0x00 }, 331 { 0x00c7, 0x38 }, 332 { 0x00c8, 0x30 }, 333 { 0x00c9, 0x05 }, 334 { 0x00ca, 0x4a }, 335 { 0x00cb, 0xd0 }, 336 { 0x00cc, 0x01 }, 337 { 0x00cd, 0xd9 }, 338 { 0x00ce, 0x6f }, 339 { 0x00cf, 0xf9 }, 340 { 0x00d0, 0x70 }, 341 { 0x00d1, 0xdf }, 342 { 0x00d2, 0xf7 }, 343 { 0x00d3, 0xc2 }, 344 { 0x00d4, 0xdf }, 345 { 0x00d5, 0x02 }, 346 { 0x00d6, 0x9a }, 347 { 0x00d7, 0xd0 }, 348 { 0x0250, 0x0d }, 349 { 0x0251, 0xcd }, 350 { 0x0252, 0xe0 }, 351 { 0x0253, 0x05 }, 352 { 0x0254, 0xa7 }, 353 { 0x0255, 0xff }, 354 { 0x0256, 0xed }, 355 { 0x0257, 0x5b }, 356 { 0x0258, 0xae }, 357 { 0x0259, 0xe6 }, 358 { 0x025a, 0x3d }, 359 { 0x025b, 0x0f }, 360 { 0x025c, 0x0d }, 361 { 0x025d, 0xea }, 362 { 0x025e, 0xf2 }, 363 { 0x025f, 0x51 }, 364 { 0x0260, 0xf5 }, 365 { 0x0261, 0x06 }, 366 { 0x021a, 0x00 }, 367 { 0x0546, 0x40 }, 368 { 0x0210, 0xc7 }, 369 { 0x0211, 0xaa }, 370 { 0x0212, 0xab }, 371 { 0x0213, 0x02 }, 372 { 0x0502, 0x00 }, 373 { 0x0121, 0x04 }, 374 { 0x0122, 0x04 }, 375 { 0x052e, 0x10 }, 376 { 0x00a4, 0xca }, 377 { 0x00a7, 0x40 }, 378 { 0x0526, 0x01 }, 379 }; 380 381 /* QAM256 Modulation table */ 382 static struct { 383 u16 reg; 384 u16 data; 385 } QAM256_mod_tab[] = { 386 { 0x00a3, 0x09 }, 387 { 0x00a4, 0x00 }, 388 { 0x0081, 0xc4 }, 389 { 0x00a5, 0x40 }, 390 { 0x00aa, 0x77 }, 391 { 0x00ad, 0x77 }, 392 { 0x00a6, 0x67 }, 393 { 0x0262, 0x20 }, 394 { 0x021c, 0x30 }, 395 { 0x00b8, 0x3e }, 396 { 0x00b9, 0xf0 }, 397 { 0x00ba, 0x01 }, 398 { 0x00bb, 0x18 }, 399 { 0x00bc, 0x50 }, 400 { 0x00bd, 0x00 }, 401 { 0x00be, 0xea }, 402 { 0x00bf, 0xef }, 403 { 0x00c0, 0xfc }, 404 { 0x00c1, 0xbd }, 405 { 0x00c2, 0x1f }, 406 { 0x00c3, 0xfc }, 407 { 0x00c4, 0xdd }, 408 { 0x00c5, 0xaf }, 409 { 0x00c6, 0x00 }, 410 { 0x00c7, 0x38 }, 411 { 0x00c8, 0x30 }, 412 { 0x00c9, 0x05 }, 413 { 0x00ca, 0x4a }, 414 { 0x00cb, 0xd0 }, 415 { 0x00cc, 0x01 }, 416 { 0x00cd, 0xd9 }, 417 { 0x00ce, 0x6f }, 418 { 0x00cf, 0xf9 }, 419 { 0x00d0, 0x70 }, 420 { 0x00d1, 0xdf }, 421 { 0x00d2, 0xf7 }, 422 { 0x00d3, 0xc2 }, 423 { 0x00d4, 0xdf }, 424 { 0x00d5, 0x02 }, 425 { 0x00d6, 0x9a }, 426 { 0x00d7, 0xd0 }, 427 { 0x0250, 0x0d }, 428 { 0x0251, 0xcd }, 429 { 0x0252, 0xe0 }, 430 { 0x0253, 0x05 }, 431 { 0x0254, 0xa7 }, 432 { 0x0255, 0xff }, 433 { 0x0256, 0xed }, 434 { 0x0257, 0x5b }, 435 { 0x0258, 0xae }, 436 { 0x0259, 0xe6 }, 437 { 0x025a, 0x3d }, 438 { 0x025b, 0x0f }, 439 { 0x025c, 0x0d }, 440 { 0x025d, 0xea }, 441 { 0x025e, 0xf2 }, 442 { 0x025f, 0x51 }, 443 { 0x0260, 0xf5 }, 444 { 0x0261, 0x06 }, 445 { 0x021a, 0x00 }, 446 { 0x0546, 0x40 }, 447 { 0x0210, 0x26 }, 448 { 0x0211, 0xf6 }, 449 { 0x0212, 0x84 }, 450 { 0x0213, 0x02 }, 451 { 0x0502, 0x01 }, 452 { 0x0121, 0x04 }, 453 { 0x0122, 0x04 }, 454 { 0x052e, 0x10 }, 455 { 0x00a4, 0xca }, 456 { 0x00a7, 0x40 }, 457 { 0x0526, 0x01 }, 458 }; 459 460 static struct { 461 u16 reg; 462 u16 data; 463 } QAM256_mod_tab_zv_mode[] = { 464 { 0x80a3, 0x09 }, 465 { 0x80a4, 0x00 }, 466 { 0x8081, 0xc4 }, 467 { 0x80a5, 0x40 }, 468 { 0x80b5, 0xfb }, 469 { 0x80b6, 0x8e }, 470 { 0x80b7, 0x39 }, 471 { 0x80aa, 0x77 }, 472 { 0x80ad, 0x77 }, 473 { 0x80a6, 0x67 }, 474 { 0x8262, 0x20 }, 475 { 0x821c, 0x30 }, 476 { 0x80b8, 0x3e }, 477 { 0x80b9, 0xf0 }, 478 { 0x80ba, 0x01 }, 479 { 0x80bb, 0x18 }, 480 { 0x80bc, 0x50 }, 481 { 0x80bd, 0x00 }, 482 { 0x80be, 0xea }, 483 { 0x80bf, 0xef }, 484 { 0x80c0, 0xfc }, 485 { 0x80c1, 0xbd }, 486 { 0x80c2, 0x1f }, 487 { 0x80c3, 0xfc }, 488 { 0x80c4, 0xdd }, 489 { 0x80c5, 0xaf }, 490 { 0x80c6, 0x00 }, 491 { 0x80c7, 0x38 }, 492 { 0x80c8, 0x30 }, 493 { 0x80c9, 0x05 }, 494 { 0x80ca, 0x4a }, 495 { 0x80cb, 0xd0 }, 496 { 0x80cc, 0x01 }, 497 { 0x80cd, 0xd9 }, 498 { 0x80ce, 0x6f }, 499 { 0x80cf, 0xf9 }, 500 { 0x80d0, 0x70 }, 501 { 0x80d1, 0xdf }, 502 { 0x80d2, 0xf7 }, 503 { 0x80d3, 0xc2 }, 504 { 0x80d4, 0xdf }, 505 { 0x80d5, 0x02 }, 506 { 0x80d6, 0x9a }, 507 { 0x80d7, 0xd0 }, 508 { 0x8250, 0x0d }, 509 { 0x8251, 0xcd }, 510 { 0x8252, 0xe0 }, 511 { 0x8253, 0x05 }, 512 { 0x8254, 0xa7 }, 513 { 0x8255, 0xff }, 514 { 0x8256, 0xed }, 515 { 0x8257, 0x5b }, 516 { 0x8258, 0xae }, 517 { 0x8259, 0xe6 }, 518 { 0x825a, 0x3d }, 519 { 0x825b, 0x0f }, 520 { 0x825c, 0x0d }, 521 { 0x825d, 0xea }, 522 { 0x825e, 0xf2 }, 523 { 0x825f, 0x51 }, 524 { 0x8260, 0xf5 }, 525 { 0x8261, 0x06 }, 526 { 0x821a, 0x01 }, 527 { 0x8546, 0x40 }, 528 { 0x8210, 0x26 }, 529 { 0x8211, 0xf6 }, 530 { 0x8212, 0x84 }, 531 { 0x8213, 0x02 }, 532 { 0x8502, 0x01 }, 533 { 0x8121, 0x04 }, 534 { 0x8122, 0x04 }, 535 { 0x852e, 0x10 }, 536 { 0x80a4, 0xca }, 537 { 0x80a7, 0x40 }, 538 { 0x8526, 0x01 }, 539 }; 540 541 static int au8522_enable_modulation(struct dvb_frontend *fe, 542 enum fe_modulation m) 543 { 544 struct au8522_state *state = fe->demodulator_priv; 545 int i; 546 547 dprintk("%s(0x%08x)\n", __func__, m); 548 549 switch (m) { 550 case VSB_8: 551 dprintk("%s() VSB_8\n", __func__); 552 for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) 553 au8522_writereg(state, 554 VSB_mod_tab[i].reg, 555 VSB_mod_tab[i].data); 556 au8522_set_if(fe, state->config.vsb_if); 557 break; 558 case QAM_64: 559 dprintk("%s() QAM 64\n", __func__); 560 for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++) 561 au8522_writereg(state, 562 QAM64_mod_tab[i].reg, 563 QAM64_mod_tab[i].data); 564 au8522_set_if(fe, state->config.qam_if); 565 break; 566 case QAM_256: 567 if (zv_mode) { 568 dprintk("%s() QAM 256 (zv_mode)\n", __func__); 569 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++) 570 au8522_writereg(state, 571 QAM256_mod_tab_zv_mode[i].reg, 572 QAM256_mod_tab_zv_mode[i].data); 573 au8522_set_if(fe, state->config.qam_if); 574 msleep(100); 575 au8522_writereg(state, 0x821a, 0x00); 576 } else { 577 dprintk("%s() QAM 256\n", __func__); 578 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++) 579 au8522_writereg(state, 580 QAM256_mod_tab[i].reg, 581 QAM256_mod_tab[i].data); 582 au8522_set_if(fe, state->config.qam_if); 583 } 584 break; 585 default: 586 dprintk("%s() Invalid modulation\n", __func__); 587 return -EINVAL; 588 } 589 590 state->current_modulation = m; 591 592 return 0; 593 } 594 595 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ 596 static int au8522_set_frontend(struct dvb_frontend *fe) 597 { 598 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 599 struct au8522_state *state = fe->demodulator_priv; 600 int ret = -EINVAL; 601 602 dprintk("%s(frequency=%d)\n", __func__, c->frequency); 603 604 if ((state->current_frequency == c->frequency) && 605 (state->current_modulation == c->modulation)) 606 return 0; 607 608 if (fe->ops.tuner_ops.set_params) { 609 if (fe->ops.i2c_gate_ctrl) 610 fe->ops.i2c_gate_ctrl(fe, 1); 611 ret = fe->ops.tuner_ops.set_params(fe); 612 if (fe->ops.i2c_gate_ctrl) 613 fe->ops.i2c_gate_ctrl(fe, 0); 614 } 615 616 if (ret < 0) 617 return ret; 618 619 /* Allow the tuner to settle */ 620 if (zv_mode) { 621 dprintk("%s() increase tuner settling time for zv_mode\n", 622 __func__); 623 msleep(250); 624 } else 625 msleep(100); 626 627 au8522_enable_modulation(fe, c->modulation); 628 629 state->current_frequency = c->frequency; 630 631 return 0; 632 } 633 634 static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status) 635 { 636 struct au8522_state *state = fe->demodulator_priv; 637 u8 reg; 638 u32 tuner_status = 0; 639 640 *status = 0; 641 642 if (state->current_modulation == VSB_8) { 643 dprintk("%s() Checking VSB_8\n", __func__); 644 reg = au8522_readreg(state, 0x0088); 645 if ((reg & 0x03) == 0x03) 646 *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; 647 } else { 648 dprintk("%s() Checking QAM\n", __func__); 649 reg = au8522_readreg(state, 0x0541); 650 if (reg & 0x80) 651 *status |= FE_HAS_VITERBI; 652 if (reg & 0x20) 653 *status |= FE_HAS_LOCK | FE_HAS_SYNC; 654 } 655 656 switch (state->config.status_mode) { 657 case AU8522_DEMODLOCKING: 658 dprintk("%s() DEMODLOCKING\n", __func__); 659 if (*status & FE_HAS_VITERBI) 660 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 661 break; 662 case AU8522_TUNERLOCKING: 663 /* Get the tuner status */ 664 dprintk("%s() TUNERLOCKING\n", __func__); 665 if (fe->ops.tuner_ops.get_status) { 666 if (fe->ops.i2c_gate_ctrl) 667 fe->ops.i2c_gate_ctrl(fe, 1); 668 669 fe->ops.tuner_ops.get_status(fe, &tuner_status); 670 671 if (fe->ops.i2c_gate_ctrl) 672 fe->ops.i2c_gate_ctrl(fe, 0); 673 } 674 if (tuner_status) 675 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 676 break; 677 } 678 state->fe_status = *status; 679 680 if (*status & FE_HAS_LOCK) 681 /* turn on LED, if it isn't on already */ 682 au8522_led_ctrl(state, -1); 683 else 684 /* turn off LED */ 685 au8522_led_ctrl(state, 0); 686 687 dprintk("%s() status 0x%08x\n", __func__, *status); 688 689 return 0; 690 } 691 692 static int au8522_led_status(struct au8522_state *state, const u16 *snr) 693 { 694 struct au8522_led_config *led_config = state->config.led_cfg; 695 int led; 696 u16 strong; 697 698 /* bail out if we can't control an LED */ 699 if (!led_config) 700 return 0; 701 702 if (0 == (state->fe_status & FE_HAS_LOCK)) 703 return au8522_led_ctrl(state, 0); 704 else if (state->current_modulation == QAM_256) 705 strong = led_config->qam256_strong; 706 else if (state->current_modulation == QAM_64) 707 strong = led_config->qam64_strong; 708 else /* (state->current_modulation == VSB_8) */ 709 strong = led_config->vsb8_strong; 710 711 if (*snr >= strong) 712 led = 2; 713 else 714 led = 1; 715 716 if ((state->led_state) && 717 (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) 718 /* snr didn't change enough to bother 719 * changing the color of the led */ 720 return 0; 721 722 return au8522_led_ctrl(state, led); 723 } 724 725 static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) 726 { 727 struct au8522_state *state = fe->demodulator_priv; 728 int ret = -EINVAL; 729 730 dprintk("%s()\n", __func__); 731 732 if (state->current_modulation == QAM_256) 733 ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, 734 ARRAY_SIZE(qam256_mse2snr_tab), 735 au8522_readreg(state, 0x0522), 736 snr); 737 else if (state->current_modulation == QAM_64) 738 ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, 739 ARRAY_SIZE(qam64_mse2snr_tab), 740 au8522_readreg(state, 0x0522), 741 snr); 742 else /* VSB_8 */ 743 ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, 744 ARRAY_SIZE(vsb_mse2snr_tab), 745 au8522_readreg(state, 0x0311), 746 snr); 747 748 if (state->config.led_cfg) 749 au8522_led_status(state, snr); 750 751 return ret; 752 } 753 754 static int au8522_read_signal_strength(struct dvb_frontend *fe, 755 u16 *signal_strength) 756 { 757 /* borrowed from lgdt330x.c 758 * 759 * Calculate strength from SNR up to 35dB 760 * Even though the SNR can go higher than 35dB, 761 * there is some comfort factor in having a range of 762 * strong signals that can show at 100% 763 */ 764 u16 snr; 765 u32 tmp; 766 int ret = au8522_read_snr(fe, &snr); 767 768 *signal_strength = 0; 769 770 if (0 == ret) { 771 /* The following calculation method was chosen 772 * purely for the sake of code re-use from the 773 * other demod drivers that use this method */ 774 775 /* Convert from SNR in dB * 10 to 8.24 fixed-point */ 776 tmp = (snr * ((1 << 24) / 10)); 777 778 /* Convert from 8.24 fixed-point to 779 * scale the range 0 - 35*2^24 into 0 - 65535*/ 780 if (tmp >= 8960 * 0x10000) 781 *signal_strength = 0xffff; 782 else 783 *signal_strength = tmp / 8960; 784 } 785 786 return ret; 787 } 788 789 static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 790 { 791 struct au8522_state *state = fe->demodulator_priv; 792 793 if (state->current_modulation == VSB_8) 794 *ucblocks = au8522_readreg(state, 0x0087); 795 else 796 *ucblocks = au8522_readreg(state, 0x0543); 797 798 return 0; 799 } 800 801 static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) 802 { 803 return au8522_read_ucblocks(fe, ber); 804 } 805 806 static int au8522_get_frontend(struct dvb_frontend *fe, 807 struct dtv_frontend_properties *c) 808 { 809 struct au8522_state *state = fe->demodulator_priv; 810 811 c->frequency = state->current_frequency; 812 c->modulation = state->current_modulation; 813 814 return 0; 815 } 816 817 static int au8522_get_tune_settings(struct dvb_frontend *fe, 818 struct dvb_frontend_tune_settings *tune) 819 { 820 tune->min_delay_ms = 1000; 821 return 0; 822 } 823 824 static const struct dvb_frontend_ops au8522_ops; 825 826 827 static void au8522_release(struct dvb_frontend *fe) 828 { 829 struct au8522_state *state = fe->demodulator_priv; 830 au8522_release_state(state); 831 } 832 833 struct dvb_frontend *au8522_attach(const struct au8522_config *config, 834 struct i2c_adapter *i2c) 835 { 836 struct au8522_state *state = NULL; 837 int instance; 838 839 /* allocate memory for the internal state */ 840 instance = au8522_get_state(&state, i2c, config->demod_address); 841 switch (instance) { 842 case 0: 843 dprintk("%s state allocation failed\n", __func__); 844 break; 845 case 1: 846 /* new demod instance */ 847 dprintk("%s using new instance\n", __func__); 848 break; 849 default: 850 /* existing demod instance */ 851 dprintk("%s using existing instance\n", __func__); 852 break; 853 } 854 855 /* setup the state */ 856 state->config = *config; 857 state->i2c = i2c; 858 state->operational_mode = AU8522_DIGITAL_MODE; 859 860 /* create dvb_frontend */ 861 memcpy(&state->frontend.ops, &au8522_ops, 862 sizeof(struct dvb_frontend_ops)); 863 state->frontend.demodulator_priv = state; 864 865 state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl; 866 867 if (au8522_init(&state->frontend) != 0) { 868 printk(KERN_ERR "%s: Failed to initialize correctly\n", 869 __func__); 870 goto error; 871 } 872 873 /* Note: Leaving the I2C gate open here. */ 874 au8522_i2c_gate_ctrl(&state->frontend, 1); 875 876 return &state->frontend; 877 878 error: 879 au8522_release_state(state); 880 return NULL; 881 } 882 EXPORT_SYMBOL_GPL(au8522_attach); 883 884 static const struct dvb_frontend_ops au8522_ops = { 885 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, 886 .info = { 887 .name = "Auvitek AU8522 QAM/8VSB Frontend", 888 .frequency_min_hz = 54 * MHz, 889 .frequency_max_hz = 858 * MHz, 890 .frequency_stepsize_hz = 62500, 891 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB 892 }, 893 894 .init = au8522_init, 895 .sleep = au8522_sleep, 896 .i2c_gate_ctrl = au8522_i2c_gate_ctrl, 897 .set_frontend = au8522_set_frontend, 898 .get_frontend = au8522_get_frontend, 899 .get_tune_settings = au8522_get_tune_settings, 900 .read_status = au8522_read_status, 901 .read_ber = au8522_read_ber, 902 .read_signal_strength = au8522_read_signal_strength, 903 .read_snr = au8522_read_snr, 904 .read_ucblocks = au8522_read_ucblocks, 905 .release = au8522_release, 906 }; 907 908 module_param(debug, int, 0644); 909 MODULE_PARM_DESC(debug, "Enable verbose debug messages"); 910 911 module_param(zv_mode, int, 0644); 912 MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n" 913 "\t\ton - modified AU8522 QAM256 initialization.\n" 914 "\t\tProvides faster lock when using ZeeVee modulator based sources"); 915 916 MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); 917 MODULE_AUTHOR("Steven Toth"); 918 MODULE_LICENSE("GPL"); 919