1 /* 2 Auvitek AU8522 QAM/8VSB demodulator driver 3 4 Copyright (C) 2008 Steven Toth <stoth@linuxtv.org> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 20 */ 21 22 #include <linux/kernel.h> 23 #include <linux/init.h> 24 #include <linux/module.h> 25 #include <linux/string.h> 26 #include <linux/delay.h> 27 #include <media/dvb_frontend.h> 28 #include "au8522.h" 29 #include "au8522_priv.h" 30 31 static int debug; 32 static int zv_mode = 1; /* default to on */ 33 34 #define dprintk(arg...)\ 35 do { if (debug)\ 36 printk(arg);\ 37 } while (0) 38 39 struct mse2snr_tab { 40 u16 val; 41 u16 data; 42 }; 43 44 /* VSB SNR lookup table */ 45 static struct mse2snr_tab vsb_mse2snr_tab[] = { 46 { 0, 270 }, 47 { 2, 250 }, 48 { 3, 240 }, 49 { 5, 230 }, 50 { 7, 220 }, 51 { 9, 210 }, 52 { 12, 200 }, 53 { 13, 195 }, 54 { 15, 190 }, 55 { 17, 185 }, 56 { 19, 180 }, 57 { 21, 175 }, 58 { 24, 170 }, 59 { 27, 165 }, 60 { 31, 160 }, 61 { 32, 158 }, 62 { 33, 156 }, 63 { 36, 152 }, 64 { 37, 150 }, 65 { 39, 148 }, 66 { 40, 146 }, 67 { 41, 144 }, 68 { 43, 142 }, 69 { 44, 140 }, 70 { 48, 135 }, 71 { 50, 130 }, 72 { 43, 142 }, 73 { 53, 125 }, 74 { 56, 120 }, 75 { 256, 115 }, 76 }; 77 78 /* QAM64 SNR lookup table */ 79 static struct mse2snr_tab qam64_mse2snr_tab[] = { 80 { 15, 0 }, 81 { 16, 290 }, 82 { 17, 288 }, 83 { 18, 286 }, 84 { 19, 284 }, 85 { 20, 282 }, 86 { 21, 281 }, 87 { 22, 279 }, 88 { 23, 277 }, 89 { 24, 275 }, 90 { 25, 273 }, 91 { 26, 271 }, 92 { 27, 269 }, 93 { 28, 268 }, 94 { 29, 266 }, 95 { 30, 264 }, 96 { 31, 262 }, 97 { 32, 260 }, 98 { 33, 259 }, 99 { 34, 258 }, 100 { 35, 256 }, 101 { 36, 255 }, 102 { 37, 254 }, 103 { 38, 252 }, 104 { 39, 251 }, 105 { 40, 250 }, 106 { 41, 249 }, 107 { 42, 248 }, 108 { 43, 246 }, 109 { 44, 245 }, 110 { 45, 244 }, 111 { 46, 242 }, 112 { 47, 241 }, 113 { 48, 240 }, 114 { 50, 239 }, 115 { 51, 238 }, 116 { 53, 237 }, 117 { 54, 236 }, 118 { 56, 235 }, 119 { 57, 234 }, 120 { 59, 233 }, 121 { 60, 232 }, 122 { 62, 231 }, 123 { 63, 230 }, 124 { 65, 229 }, 125 { 67, 228 }, 126 { 68, 227 }, 127 { 70, 226 }, 128 { 71, 225 }, 129 { 73, 224 }, 130 { 74, 223 }, 131 { 76, 222 }, 132 { 78, 221 }, 133 { 80, 220 }, 134 { 82, 219 }, 135 { 85, 218 }, 136 { 88, 217 }, 137 { 90, 216 }, 138 { 92, 215 }, 139 { 93, 214 }, 140 { 94, 212 }, 141 { 95, 211 }, 142 { 97, 210 }, 143 { 99, 209 }, 144 { 101, 208 }, 145 { 102, 207 }, 146 { 104, 206 }, 147 { 107, 205 }, 148 { 111, 204 }, 149 { 114, 203 }, 150 { 118, 202 }, 151 { 122, 201 }, 152 { 125, 200 }, 153 { 128, 199 }, 154 { 130, 198 }, 155 { 132, 197 }, 156 { 256, 190 }, 157 }; 158 159 /* QAM256 SNR lookup table */ 160 static struct mse2snr_tab qam256_mse2snr_tab[] = { 161 { 15, 0 }, 162 { 16, 400 }, 163 { 17, 398 }, 164 { 18, 396 }, 165 { 19, 394 }, 166 { 20, 392 }, 167 { 21, 390 }, 168 { 22, 388 }, 169 { 23, 386 }, 170 { 24, 384 }, 171 { 25, 382 }, 172 { 26, 380 }, 173 { 27, 379 }, 174 { 28, 378 }, 175 { 29, 377 }, 176 { 30, 376 }, 177 { 31, 375 }, 178 { 32, 374 }, 179 { 33, 373 }, 180 { 34, 372 }, 181 { 35, 371 }, 182 { 36, 370 }, 183 { 37, 362 }, 184 { 38, 354 }, 185 { 39, 346 }, 186 { 40, 338 }, 187 { 41, 330 }, 188 { 42, 328 }, 189 { 43, 326 }, 190 { 44, 324 }, 191 { 45, 322 }, 192 { 46, 320 }, 193 { 47, 319 }, 194 { 48, 318 }, 195 { 49, 317 }, 196 { 50, 316 }, 197 { 51, 315 }, 198 { 52, 314 }, 199 { 53, 313 }, 200 { 54, 312 }, 201 { 55, 311 }, 202 { 56, 310 }, 203 { 57, 308 }, 204 { 58, 306 }, 205 { 59, 304 }, 206 { 60, 302 }, 207 { 61, 300 }, 208 { 62, 298 }, 209 { 65, 295 }, 210 { 68, 294 }, 211 { 70, 293 }, 212 { 73, 292 }, 213 { 76, 291 }, 214 { 78, 290 }, 215 { 79, 289 }, 216 { 81, 288 }, 217 { 82, 287 }, 218 { 83, 286 }, 219 { 84, 285 }, 220 { 85, 284 }, 221 { 86, 283 }, 222 { 88, 282 }, 223 { 89, 281 }, 224 { 256, 280 }, 225 }; 226 227 static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, 228 u16 *snr) 229 { 230 int i, ret = -EINVAL; 231 dprintk("%s()\n", __func__); 232 233 for (i = 0; i < sz; i++) { 234 if (mse < tab[i].val) { 235 *snr = tab[i].data; 236 ret = 0; 237 break; 238 } 239 } 240 dprintk("%s() snr=%d\n", __func__, *snr); 241 return ret; 242 } 243 244 static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq) 245 { 246 struct au8522_state *state = fe->demodulator_priv; 247 u8 r0b5, r0b6, r0b7; 248 char *ifmhz; 249 250 switch (if_freq) { 251 case AU8522_IF_3_25MHZ: 252 ifmhz = "3.25"; 253 r0b5 = 0x00; 254 r0b6 = 0x3d; 255 r0b7 = 0xa0; 256 break; 257 case AU8522_IF_4MHZ: 258 ifmhz = "4.00"; 259 r0b5 = 0x00; 260 r0b6 = 0x4b; 261 r0b7 = 0xd9; 262 break; 263 case AU8522_IF_6MHZ: 264 ifmhz = "6.00"; 265 r0b5 = 0xfb; 266 r0b6 = 0x8e; 267 r0b7 = 0x39; 268 break; 269 default: 270 dprintk("%s() IF Frequency not supported\n", __func__); 271 return -EINVAL; 272 } 273 dprintk("%s() %s MHz\n", __func__, ifmhz); 274 au8522_writereg(state, 0x00b5, r0b5); 275 au8522_writereg(state, 0x00b6, r0b6); 276 au8522_writereg(state, 0x00b7, r0b7); 277 278 return 0; 279 } 280 281 /* VSB Modulation table */ 282 static struct { 283 u16 reg; 284 u16 data; 285 } VSB_mod_tab[] = { 286 { 0x0090, 0x84 }, 287 { 0x2005, 0x00 }, 288 { 0x0091, 0x80 }, 289 { 0x00a3, 0x0c }, 290 { 0x00a4, 0xe8 }, 291 { 0x0081, 0xc4 }, 292 { 0x00a5, 0x40 }, 293 { 0x00a7, 0x40 }, 294 { 0x00a6, 0x67 }, 295 { 0x0262, 0x20 }, 296 { 0x021c, 0x30 }, 297 { 0x00d8, 0x1a }, 298 { 0x0227, 0xa0 }, 299 { 0x0121, 0xff }, 300 { 0x00a8, 0xf0 }, 301 { 0x00a9, 0x05 }, 302 { 0x00aa, 0x77 }, 303 { 0x00ab, 0xf0 }, 304 { 0x00ac, 0x05 }, 305 { 0x00ad, 0x77 }, 306 { 0x00ae, 0x41 }, 307 { 0x00af, 0x66 }, 308 { 0x021b, 0xcc }, 309 { 0x021d, 0x80 }, 310 { 0x00a4, 0xe8 }, 311 { 0x0231, 0x13 }, 312 }; 313 314 /* QAM64 Modulation table */ 315 static struct { 316 u16 reg; 317 u16 data; 318 } QAM64_mod_tab[] = { 319 { 0x00a3, 0x09 }, 320 { 0x00a4, 0x00 }, 321 { 0x0081, 0xc4 }, 322 { 0x00a5, 0x40 }, 323 { 0x00aa, 0x77 }, 324 { 0x00ad, 0x77 }, 325 { 0x00a6, 0x67 }, 326 { 0x0262, 0x20 }, 327 { 0x021c, 0x30 }, 328 { 0x00b8, 0x3e }, 329 { 0x00b9, 0xf0 }, 330 { 0x00ba, 0x01 }, 331 { 0x00bb, 0x18 }, 332 { 0x00bc, 0x50 }, 333 { 0x00bd, 0x00 }, 334 { 0x00be, 0xea }, 335 { 0x00bf, 0xef }, 336 { 0x00c0, 0xfc }, 337 { 0x00c1, 0xbd }, 338 { 0x00c2, 0x1f }, 339 { 0x00c3, 0xfc }, 340 { 0x00c4, 0xdd }, 341 { 0x00c5, 0xaf }, 342 { 0x00c6, 0x00 }, 343 { 0x00c7, 0x38 }, 344 { 0x00c8, 0x30 }, 345 { 0x00c9, 0x05 }, 346 { 0x00ca, 0x4a }, 347 { 0x00cb, 0xd0 }, 348 { 0x00cc, 0x01 }, 349 { 0x00cd, 0xd9 }, 350 { 0x00ce, 0x6f }, 351 { 0x00cf, 0xf9 }, 352 { 0x00d0, 0x70 }, 353 { 0x00d1, 0xdf }, 354 { 0x00d2, 0xf7 }, 355 { 0x00d3, 0xc2 }, 356 { 0x00d4, 0xdf }, 357 { 0x00d5, 0x02 }, 358 { 0x00d6, 0x9a }, 359 { 0x00d7, 0xd0 }, 360 { 0x0250, 0x0d }, 361 { 0x0251, 0xcd }, 362 { 0x0252, 0xe0 }, 363 { 0x0253, 0x05 }, 364 { 0x0254, 0xa7 }, 365 { 0x0255, 0xff }, 366 { 0x0256, 0xed }, 367 { 0x0257, 0x5b }, 368 { 0x0258, 0xae }, 369 { 0x0259, 0xe6 }, 370 { 0x025a, 0x3d }, 371 { 0x025b, 0x0f }, 372 { 0x025c, 0x0d }, 373 { 0x025d, 0xea }, 374 { 0x025e, 0xf2 }, 375 { 0x025f, 0x51 }, 376 { 0x0260, 0xf5 }, 377 { 0x0261, 0x06 }, 378 { 0x021a, 0x00 }, 379 { 0x0546, 0x40 }, 380 { 0x0210, 0xc7 }, 381 { 0x0211, 0xaa }, 382 { 0x0212, 0xab }, 383 { 0x0213, 0x02 }, 384 { 0x0502, 0x00 }, 385 { 0x0121, 0x04 }, 386 { 0x0122, 0x04 }, 387 { 0x052e, 0x10 }, 388 { 0x00a4, 0xca }, 389 { 0x00a7, 0x40 }, 390 { 0x0526, 0x01 }, 391 }; 392 393 /* QAM256 Modulation table */ 394 static struct { 395 u16 reg; 396 u16 data; 397 } QAM256_mod_tab[] = { 398 { 0x00a3, 0x09 }, 399 { 0x00a4, 0x00 }, 400 { 0x0081, 0xc4 }, 401 { 0x00a5, 0x40 }, 402 { 0x00aa, 0x77 }, 403 { 0x00ad, 0x77 }, 404 { 0x00a6, 0x67 }, 405 { 0x0262, 0x20 }, 406 { 0x021c, 0x30 }, 407 { 0x00b8, 0x3e }, 408 { 0x00b9, 0xf0 }, 409 { 0x00ba, 0x01 }, 410 { 0x00bb, 0x18 }, 411 { 0x00bc, 0x50 }, 412 { 0x00bd, 0x00 }, 413 { 0x00be, 0xea }, 414 { 0x00bf, 0xef }, 415 { 0x00c0, 0xfc }, 416 { 0x00c1, 0xbd }, 417 { 0x00c2, 0x1f }, 418 { 0x00c3, 0xfc }, 419 { 0x00c4, 0xdd }, 420 { 0x00c5, 0xaf }, 421 { 0x00c6, 0x00 }, 422 { 0x00c7, 0x38 }, 423 { 0x00c8, 0x30 }, 424 { 0x00c9, 0x05 }, 425 { 0x00ca, 0x4a }, 426 { 0x00cb, 0xd0 }, 427 { 0x00cc, 0x01 }, 428 { 0x00cd, 0xd9 }, 429 { 0x00ce, 0x6f }, 430 { 0x00cf, 0xf9 }, 431 { 0x00d0, 0x70 }, 432 { 0x00d1, 0xdf }, 433 { 0x00d2, 0xf7 }, 434 { 0x00d3, 0xc2 }, 435 { 0x00d4, 0xdf }, 436 { 0x00d5, 0x02 }, 437 { 0x00d6, 0x9a }, 438 { 0x00d7, 0xd0 }, 439 { 0x0250, 0x0d }, 440 { 0x0251, 0xcd }, 441 { 0x0252, 0xe0 }, 442 { 0x0253, 0x05 }, 443 { 0x0254, 0xa7 }, 444 { 0x0255, 0xff }, 445 { 0x0256, 0xed }, 446 { 0x0257, 0x5b }, 447 { 0x0258, 0xae }, 448 { 0x0259, 0xe6 }, 449 { 0x025a, 0x3d }, 450 { 0x025b, 0x0f }, 451 { 0x025c, 0x0d }, 452 { 0x025d, 0xea }, 453 { 0x025e, 0xf2 }, 454 { 0x025f, 0x51 }, 455 { 0x0260, 0xf5 }, 456 { 0x0261, 0x06 }, 457 { 0x021a, 0x00 }, 458 { 0x0546, 0x40 }, 459 { 0x0210, 0x26 }, 460 { 0x0211, 0xf6 }, 461 { 0x0212, 0x84 }, 462 { 0x0213, 0x02 }, 463 { 0x0502, 0x01 }, 464 { 0x0121, 0x04 }, 465 { 0x0122, 0x04 }, 466 { 0x052e, 0x10 }, 467 { 0x00a4, 0xca }, 468 { 0x00a7, 0x40 }, 469 { 0x0526, 0x01 }, 470 }; 471 472 static struct { 473 u16 reg; 474 u16 data; 475 } QAM256_mod_tab_zv_mode[] = { 476 { 0x80a3, 0x09 }, 477 { 0x80a4, 0x00 }, 478 { 0x8081, 0xc4 }, 479 { 0x80a5, 0x40 }, 480 { 0x80b5, 0xfb }, 481 { 0x80b6, 0x8e }, 482 { 0x80b7, 0x39 }, 483 { 0x80aa, 0x77 }, 484 { 0x80ad, 0x77 }, 485 { 0x80a6, 0x67 }, 486 { 0x8262, 0x20 }, 487 { 0x821c, 0x30 }, 488 { 0x80b8, 0x3e }, 489 { 0x80b9, 0xf0 }, 490 { 0x80ba, 0x01 }, 491 { 0x80bb, 0x18 }, 492 { 0x80bc, 0x50 }, 493 { 0x80bd, 0x00 }, 494 { 0x80be, 0xea }, 495 { 0x80bf, 0xef }, 496 { 0x80c0, 0xfc }, 497 { 0x80c1, 0xbd }, 498 { 0x80c2, 0x1f }, 499 { 0x80c3, 0xfc }, 500 { 0x80c4, 0xdd }, 501 { 0x80c5, 0xaf }, 502 { 0x80c6, 0x00 }, 503 { 0x80c7, 0x38 }, 504 { 0x80c8, 0x30 }, 505 { 0x80c9, 0x05 }, 506 { 0x80ca, 0x4a }, 507 { 0x80cb, 0xd0 }, 508 { 0x80cc, 0x01 }, 509 { 0x80cd, 0xd9 }, 510 { 0x80ce, 0x6f }, 511 { 0x80cf, 0xf9 }, 512 { 0x80d0, 0x70 }, 513 { 0x80d1, 0xdf }, 514 { 0x80d2, 0xf7 }, 515 { 0x80d3, 0xc2 }, 516 { 0x80d4, 0xdf }, 517 { 0x80d5, 0x02 }, 518 { 0x80d6, 0x9a }, 519 { 0x80d7, 0xd0 }, 520 { 0x8250, 0x0d }, 521 { 0x8251, 0xcd }, 522 { 0x8252, 0xe0 }, 523 { 0x8253, 0x05 }, 524 { 0x8254, 0xa7 }, 525 { 0x8255, 0xff }, 526 { 0x8256, 0xed }, 527 { 0x8257, 0x5b }, 528 { 0x8258, 0xae }, 529 { 0x8259, 0xe6 }, 530 { 0x825a, 0x3d }, 531 { 0x825b, 0x0f }, 532 { 0x825c, 0x0d }, 533 { 0x825d, 0xea }, 534 { 0x825e, 0xf2 }, 535 { 0x825f, 0x51 }, 536 { 0x8260, 0xf5 }, 537 { 0x8261, 0x06 }, 538 { 0x821a, 0x01 }, 539 { 0x8546, 0x40 }, 540 { 0x8210, 0x26 }, 541 { 0x8211, 0xf6 }, 542 { 0x8212, 0x84 }, 543 { 0x8213, 0x02 }, 544 { 0x8502, 0x01 }, 545 { 0x8121, 0x04 }, 546 { 0x8122, 0x04 }, 547 { 0x852e, 0x10 }, 548 { 0x80a4, 0xca }, 549 { 0x80a7, 0x40 }, 550 { 0x8526, 0x01 }, 551 }; 552 553 static int au8522_enable_modulation(struct dvb_frontend *fe, 554 enum fe_modulation m) 555 { 556 struct au8522_state *state = fe->demodulator_priv; 557 int i; 558 559 dprintk("%s(0x%08x)\n", __func__, m); 560 561 switch (m) { 562 case VSB_8: 563 dprintk("%s() VSB_8\n", __func__); 564 for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) 565 au8522_writereg(state, 566 VSB_mod_tab[i].reg, 567 VSB_mod_tab[i].data); 568 au8522_set_if(fe, state->config.vsb_if); 569 break; 570 case QAM_64: 571 dprintk("%s() QAM 64\n", __func__); 572 for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++) 573 au8522_writereg(state, 574 QAM64_mod_tab[i].reg, 575 QAM64_mod_tab[i].data); 576 au8522_set_if(fe, state->config.qam_if); 577 break; 578 case QAM_256: 579 if (zv_mode) { 580 dprintk("%s() QAM 256 (zv_mode)\n", __func__); 581 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++) 582 au8522_writereg(state, 583 QAM256_mod_tab_zv_mode[i].reg, 584 QAM256_mod_tab_zv_mode[i].data); 585 au8522_set_if(fe, state->config.qam_if); 586 msleep(100); 587 au8522_writereg(state, 0x821a, 0x00); 588 } else { 589 dprintk("%s() QAM 256\n", __func__); 590 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++) 591 au8522_writereg(state, 592 QAM256_mod_tab[i].reg, 593 QAM256_mod_tab[i].data); 594 au8522_set_if(fe, state->config.qam_if); 595 } 596 break; 597 default: 598 dprintk("%s() Invalid modulation\n", __func__); 599 return -EINVAL; 600 } 601 602 state->current_modulation = m; 603 604 return 0; 605 } 606 607 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ 608 static int au8522_set_frontend(struct dvb_frontend *fe) 609 { 610 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 611 struct au8522_state *state = fe->demodulator_priv; 612 int ret = -EINVAL; 613 614 dprintk("%s(frequency=%d)\n", __func__, c->frequency); 615 616 if ((state->current_frequency == c->frequency) && 617 (state->current_modulation == c->modulation)) 618 return 0; 619 620 if (fe->ops.tuner_ops.set_params) { 621 if (fe->ops.i2c_gate_ctrl) 622 fe->ops.i2c_gate_ctrl(fe, 1); 623 ret = fe->ops.tuner_ops.set_params(fe); 624 if (fe->ops.i2c_gate_ctrl) 625 fe->ops.i2c_gate_ctrl(fe, 0); 626 } 627 628 if (ret < 0) 629 return ret; 630 631 /* Allow the tuner to settle */ 632 if (zv_mode) { 633 dprintk("%s() increase tuner settling time for zv_mode\n", 634 __func__); 635 msleep(250); 636 } else 637 msleep(100); 638 639 au8522_enable_modulation(fe, c->modulation); 640 641 state->current_frequency = c->frequency; 642 643 return 0; 644 } 645 646 static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status) 647 { 648 struct au8522_state *state = fe->demodulator_priv; 649 u8 reg; 650 u32 tuner_status = 0; 651 652 *status = 0; 653 654 if (state->current_modulation == VSB_8) { 655 dprintk("%s() Checking VSB_8\n", __func__); 656 reg = au8522_readreg(state, 0x0088); 657 if ((reg & 0x03) == 0x03) 658 *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; 659 } else { 660 dprintk("%s() Checking QAM\n", __func__); 661 reg = au8522_readreg(state, 0x0541); 662 if (reg & 0x80) 663 *status |= FE_HAS_VITERBI; 664 if (reg & 0x20) 665 *status |= FE_HAS_LOCK | FE_HAS_SYNC; 666 } 667 668 switch (state->config.status_mode) { 669 case AU8522_DEMODLOCKING: 670 dprintk("%s() DEMODLOCKING\n", __func__); 671 if (*status & FE_HAS_VITERBI) 672 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 673 break; 674 case AU8522_TUNERLOCKING: 675 /* Get the tuner status */ 676 dprintk("%s() TUNERLOCKING\n", __func__); 677 if (fe->ops.tuner_ops.get_status) { 678 if (fe->ops.i2c_gate_ctrl) 679 fe->ops.i2c_gate_ctrl(fe, 1); 680 681 fe->ops.tuner_ops.get_status(fe, &tuner_status); 682 683 if (fe->ops.i2c_gate_ctrl) 684 fe->ops.i2c_gate_ctrl(fe, 0); 685 } 686 if (tuner_status) 687 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 688 break; 689 } 690 state->fe_status = *status; 691 692 if (*status & FE_HAS_LOCK) 693 /* turn on LED, if it isn't on already */ 694 au8522_led_ctrl(state, -1); 695 else 696 /* turn off LED */ 697 au8522_led_ctrl(state, 0); 698 699 dprintk("%s() status 0x%08x\n", __func__, *status); 700 701 return 0; 702 } 703 704 static int au8522_led_status(struct au8522_state *state, const u16 *snr) 705 { 706 struct au8522_led_config *led_config = state->config.led_cfg; 707 int led; 708 u16 strong; 709 710 /* bail out if we can't control an LED */ 711 if (!led_config) 712 return 0; 713 714 if (0 == (state->fe_status & FE_HAS_LOCK)) 715 return au8522_led_ctrl(state, 0); 716 else if (state->current_modulation == QAM_256) 717 strong = led_config->qam256_strong; 718 else if (state->current_modulation == QAM_64) 719 strong = led_config->qam64_strong; 720 else /* (state->current_modulation == VSB_8) */ 721 strong = led_config->vsb8_strong; 722 723 if (*snr >= strong) 724 led = 2; 725 else 726 led = 1; 727 728 if ((state->led_state) && 729 (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) 730 /* snr didn't change enough to bother 731 * changing the color of the led */ 732 return 0; 733 734 return au8522_led_ctrl(state, led); 735 } 736 737 static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) 738 { 739 struct au8522_state *state = fe->demodulator_priv; 740 int ret = -EINVAL; 741 742 dprintk("%s()\n", __func__); 743 744 if (state->current_modulation == QAM_256) 745 ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, 746 ARRAY_SIZE(qam256_mse2snr_tab), 747 au8522_readreg(state, 0x0522), 748 snr); 749 else if (state->current_modulation == QAM_64) 750 ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, 751 ARRAY_SIZE(qam64_mse2snr_tab), 752 au8522_readreg(state, 0x0522), 753 snr); 754 else /* VSB_8 */ 755 ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, 756 ARRAY_SIZE(vsb_mse2snr_tab), 757 au8522_readreg(state, 0x0311), 758 snr); 759 760 if (state->config.led_cfg) 761 au8522_led_status(state, snr); 762 763 return ret; 764 } 765 766 static int au8522_read_signal_strength(struct dvb_frontend *fe, 767 u16 *signal_strength) 768 { 769 /* borrowed from lgdt330x.c 770 * 771 * Calculate strength from SNR up to 35dB 772 * Even though the SNR can go higher than 35dB, 773 * there is some comfort factor in having a range of 774 * strong signals that can show at 100% 775 */ 776 u16 snr; 777 u32 tmp; 778 int ret = au8522_read_snr(fe, &snr); 779 780 *signal_strength = 0; 781 782 if (0 == ret) { 783 /* The following calculation method was chosen 784 * purely for the sake of code re-use from the 785 * other demod drivers that use this method */ 786 787 /* Convert from SNR in dB * 10 to 8.24 fixed-point */ 788 tmp = (snr * ((1 << 24) / 10)); 789 790 /* Convert from 8.24 fixed-point to 791 * scale the range 0 - 35*2^24 into 0 - 65535*/ 792 if (tmp >= 8960 * 0x10000) 793 *signal_strength = 0xffff; 794 else 795 *signal_strength = tmp / 8960; 796 } 797 798 return ret; 799 } 800 801 static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 802 { 803 struct au8522_state *state = fe->demodulator_priv; 804 805 if (state->current_modulation == VSB_8) 806 *ucblocks = au8522_readreg(state, 0x0087); 807 else 808 *ucblocks = au8522_readreg(state, 0x0543); 809 810 return 0; 811 } 812 813 static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) 814 { 815 return au8522_read_ucblocks(fe, ber); 816 } 817 818 static int au8522_get_frontend(struct dvb_frontend *fe, 819 struct dtv_frontend_properties *c) 820 { 821 struct au8522_state *state = fe->demodulator_priv; 822 823 c->frequency = state->current_frequency; 824 c->modulation = state->current_modulation; 825 826 return 0; 827 } 828 829 static int au8522_get_tune_settings(struct dvb_frontend *fe, 830 struct dvb_frontend_tune_settings *tune) 831 { 832 tune->min_delay_ms = 1000; 833 return 0; 834 } 835 836 static const struct dvb_frontend_ops au8522_ops; 837 838 839 static void au8522_release(struct dvb_frontend *fe) 840 { 841 struct au8522_state *state = fe->demodulator_priv; 842 au8522_release_state(state); 843 } 844 845 struct dvb_frontend *au8522_attach(const struct au8522_config *config, 846 struct i2c_adapter *i2c) 847 { 848 struct au8522_state *state = NULL; 849 int instance; 850 851 /* allocate memory for the internal state */ 852 instance = au8522_get_state(&state, i2c, config->demod_address); 853 switch (instance) { 854 case 0: 855 dprintk("%s state allocation failed\n", __func__); 856 break; 857 case 1: 858 /* new demod instance */ 859 dprintk("%s using new instance\n", __func__); 860 break; 861 default: 862 /* existing demod instance */ 863 dprintk("%s using existing instance\n", __func__); 864 break; 865 } 866 867 /* setup the state */ 868 state->config = *config; 869 state->i2c = i2c; 870 state->operational_mode = AU8522_DIGITAL_MODE; 871 872 /* create dvb_frontend */ 873 memcpy(&state->frontend.ops, &au8522_ops, 874 sizeof(struct dvb_frontend_ops)); 875 state->frontend.demodulator_priv = state; 876 877 state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl; 878 879 if (au8522_init(&state->frontend) != 0) { 880 printk(KERN_ERR "%s: Failed to initialize correctly\n", 881 __func__); 882 goto error; 883 } 884 885 /* Note: Leaving the I2C gate open here. */ 886 au8522_i2c_gate_ctrl(&state->frontend, 1); 887 888 return &state->frontend; 889 890 error: 891 au8522_release_state(state); 892 return NULL; 893 } 894 EXPORT_SYMBOL(au8522_attach); 895 896 static const struct dvb_frontend_ops au8522_ops = { 897 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, 898 .info = { 899 .name = "Auvitek AU8522 QAM/8VSB Frontend", 900 .frequency_min_hz = 54 * MHz, 901 .frequency_max_hz = 858 * MHz, 902 .frequency_stepsize_hz = 62500, 903 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB 904 }, 905 906 .init = au8522_init, 907 .sleep = au8522_sleep, 908 .i2c_gate_ctrl = au8522_i2c_gate_ctrl, 909 .set_frontend = au8522_set_frontend, 910 .get_frontend = au8522_get_frontend, 911 .get_tune_settings = au8522_get_tune_settings, 912 .read_status = au8522_read_status, 913 .read_ber = au8522_read_ber, 914 .read_signal_strength = au8522_read_signal_strength, 915 .read_snr = au8522_read_snr, 916 .read_ucblocks = au8522_read_ucblocks, 917 .release = au8522_release, 918 }; 919 920 module_param(debug, int, 0644); 921 MODULE_PARM_DESC(debug, "Enable verbose debug messages"); 922 923 module_param(zv_mode, int, 0644); 924 MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n" 925 "\t\ton - modified AU8522 QAM256 initialization.\n" 926 "\t\tProvides faster lock when using ZeeVee modulator based sources"); 927 928 MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); 929 MODULE_AUTHOR("Steven Toth"); 930 MODULE_LICENSE("GPL"); 931