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 "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, 0x80b5, r0b5); 275 au8522_writereg(state, 0x80b6, r0b6); 276 au8522_writereg(state, 0x80b7, 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 { 0x8090, 0x84 }, 287 { 0x4092, 0x11 }, 288 { 0x2005, 0x00 }, 289 { 0x8091, 0x80 }, 290 { 0x80a3, 0x0c }, 291 { 0x80a4, 0xe8 }, 292 { 0x8081, 0xc4 }, 293 { 0x80a5, 0x40 }, 294 { 0x80a7, 0x40 }, 295 { 0x80a6, 0x67 }, 296 { 0x8262, 0x20 }, 297 { 0x821c, 0x30 }, 298 { 0x80d8, 0x1a }, 299 { 0x8227, 0xa0 }, 300 { 0x8121, 0xff }, 301 { 0x80a8, 0xf0 }, 302 { 0x80a9, 0x05 }, 303 { 0x80aa, 0x77 }, 304 { 0x80ab, 0xf0 }, 305 { 0x80ac, 0x05 }, 306 { 0x80ad, 0x77 }, 307 { 0x80ae, 0x41 }, 308 { 0x80af, 0x66 }, 309 { 0x821b, 0xcc }, 310 { 0x821d, 0x80 }, 311 { 0x80a4, 0xe8 }, 312 { 0x8231, 0x13 }, 313 }; 314 315 /* QAM64 Modulation table */ 316 static struct { 317 u16 reg; 318 u16 data; 319 } QAM64_mod_tab[] = { 320 { 0x00a3, 0x09 }, 321 { 0x00a4, 0x00 }, 322 { 0x0081, 0xc4 }, 323 { 0x00a5, 0x40 }, 324 { 0x00aa, 0x77 }, 325 { 0x00ad, 0x77 }, 326 { 0x00a6, 0x67 }, 327 { 0x0262, 0x20 }, 328 { 0x021c, 0x30 }, 329 { 0x00b8, 0x3e }, 330 { 0x00b9, 0xf0 }, 331 { 0x00ba, 0x01 }, 332 { 0x00bb, 0x18 }, 333 { 0x00bc, 0x50 }, 334 { 0x00bd, 0x00 }, 335 { 0x00be, 0xea }, 336 { 0x00bf, 0xef }, 337 { 0x00c0, 0xfc }, 338 { 0x00c1, 0xbd }, 339 { 0x00c2, 0x1f }, 340 { 0x00c3, 0xfc }, 341 { 0x00c4, 0xdd }, 342 { 0x00c5, 0xaf }, 343 { 0x00c6, 0x00 }, 344 { 0x00c7, 0x38 }, 345 { 0x00c8, 0x30 }, 346 { 0x00c9, 0x05 }, 347 { 0x00ca, 0x4a }, 348 { 0x00cb, 0xd0 }, 349 { 0x00cc, 0x01 }, 350 { 0x00cd, 0xd9 }, 351 { 0x00ce, 0x6f }, 352 { 0x00cf, 0xf9 }, 353 { 0x00d0, 0x70 }, 354 { 0x00d1, 0xdf }, 355 { 0x00d2, 0xf7 }, 356 { 0x00d3, 0xc2 }, 357 { 0x00d4, 0xdf }, 358 { 0x00d5, 0x02 }, 359 { 0x00d6, 0x9a }, 360 { 0x00d7, 0xd0 }, 361 { 0x0250, 0x0d }, 362 { 0x0251, 0xcd }, 363 { 0x0252, 0xe0 }, 364 { 0x0253, 0x05 }, 365 { 0x0254, 0xa7 }, 366 { 0x0255, 0xff }, 367 { 0x0256, 0xed }, 368 { 0x0257, 0x5b }, 369 { 0x0258, 0xae }, 370 { 0x0259, 0xe6 }, 371 { 0x025a, 0x3d }, 372 { 0x025b, 0x0f }, 373 { 0x025c, 0x0d }, 374 { 0x025d, 0xea }, 375 { 0x025e, 0xf2 }, 376 { 0x025f, 0x51 }, 377 { 0x0260, 0xf5 }, 378 { 0x0261, 0x06 }, 379 { 0x021a, 0x00 }, 380 { 0x0546, 0x40 }, 381 { 0x0210, 0xc7 }, 382 { 0x0211, 0xaa }, 383 { 0x0212, 0xab }, 384 { 0x0213, 0x02 }, 385 { 0x0502, 0x00 }, 386 { 0x0121, 0x04 }, 387 { 0x0122, 0x04 }, 388 { 0x052e, 0x10 }, 389 { 0x00a4, 0xca }, 390 { 0x00a7, 0x40 }, 391 { 0x0526, 0x01 }, 392 }; 393 394 /* QAM256 Modulation table */ 395 static struct { 396 u16 reg; 397 u16 data; 398 } QAM256_mod_tab[] = { 399 { 0x80a3, 0x09 }, 400 { 0x80a4, 0x00 }, 401 { 0x8081, 0xc4 }, 402 { 0x80a5, 0x40 }, 403 { 0x80aa, 0x77 }, 404 { 0x80ad, 0x77 }, 405 { 0x80a6, 0x67 }, 406 { 0x8262, 0x20 }, 407 { 0x821c, 0x30 }, 408 { 0x80b8, 0x3e }, 409 { 0x80b9, 0xf0 }, 410 { 0x80ba, 0x01 }, 411 { 0x80bb, 0x18 }, 412 { 0x80bc, 0x50 }, 413 { 0x80bd, 0x00 }, 414 { 0x80be, 0xea }, 415 { 0x80bf, 0xef }, 416 { 0x80c0, 0xfc }, 417 { 0x80c1, 0xbd }, 418 { 0x80c2, 0x1f }, 419 { 0x80c3, 0xfc }, 420 { 0x80c4, 0xdd }, 421 { 0x80c5, 0xaf }, 422 { 0x80c6, 0x00 }, 423 { 0x80c7, 0x38 }, 424 { 0x80c8, 0x30 }, 425 { 0x80c9, 0x05 }, 426 { 0x80ca, 0x4a }, 427 { 0x80cb, 0xd0 }, 428 { 0x80cc, 0x01 }, 429 { 0x80cd, 0xd9 }, 430 { 0x80ce, 0x6f }, 431 { 0x80cf, 0xf9 }, 432 { 0x80d0, 0x70 }, 433 { 0x80d1, 0xdf }, 434 { 0x80d2, 0xf7 }, 435 { 0x80d3, 0xc2 }, 436 { 0x80d4, 0xdf }, 437 { 0x80d5, 0x02 }, 438 { 0x80d6, 0x9a }, 439 { 0x80d7, 0xd0 }, 440 { 0x8250, 0x0d }, 441 { 0x8251, 0xcd }, 442 { 0x8252, 0xe0 }, 443 { 0x8253, 0x05 }, 444 { 0x8254, 0xa7 }, 445 { 0x8255, 0xff }, 446 { 0x8256, 0xed }, 447 { 0x8257, 0x5b }, 448 { 0x8258, 0xae }, 449 { 0x8259, 0xe6 }, 450 { 0x825a, 0x3d }, 451 { 0x825b, 0x0f }, 452 { 0x825c, 0x0d }, 453 { 0x825d, 0xea }, 454 { 0x825e, 0xf2 }, 455 { 0x825f, 0x51 }, 456 { 0x8260, 0xf5 }, 457 { 0x8261, 0x06 }, 458 { 0x821a, 0x00 }, 459 { 0x8546, 0x40 }, 460 { 0x8210, 0x26 }, 461 { 0x8211, 0xf6 }, 462 { 0x8212, 0x84 }, 463 { 0x8213, 0x02 }, 464 { 0x8502, 0x01 }, 465 { 0x8121, 0x04 }, 466 { 0x8122, 0x04 }, 467 { 0x852e, 0x10 }, 468 { 0x80a4, 0xca }, 469 { 0x80a7, 0x40 }, 470 { 0x8526, 0x01 }, 471 }; 472 473 static struct { 474 u16 reg; 475 u16 data; 476 } QAM256_mod_tab_zv_mode[] = { 477 { 0x80a3, 0x09 }, 478 { 0x80a4, 0x00 }, 479 { 0x8081, 0xc4 }, 480 { 0x80a5, 0x40 }, 481 { 0x80b5, 0xfb }, 482 { 0x80b6, 0x8e }, 483 { 0x80b7, 0x39 }, 484 { 0x80aa, 0x77 }, 485 { 0x80ad, 0x77 }, 486 { 0x80a6, 0x67 }, 487 { 0x8262, 0x20 }, 488 { 0x821c, 0x30 }, 489 { 0x80b8, 0x3e }, 490 { 0x80b9, 0xf0 }, 491 { 0x80ba, 0x01 }, 492 { 0x80bb, 0x18 }, 493 { 0x80bc, 0x50 }, 494 { 0x80bd, 0x00 }, 495 { 0x80be, 0xea }, 496 { 0x80bf, 0xef }, 497 { 0x80c0, 0xfc }, 498 { 0x80c1, 0xbd }, 499 { 0x80c2, 0x1f }, 500 { 0x80c3, 0xfc }, 501 { 0x80c4, 0xdd }, 502 { 0x80c5, 0xaf }, 503 { 0x80c6, 0x00 }, 504 { 0x80c7, 0x38 }, 505 { 0x80c8, 0x30 }, 506 { 0x80c9, 0x05 }, 507 { 0x80ca, 0x4a }, 508 { 0x80cb, 0xd0 }, 509 { 0x80cc, 0x01 }, 510 { 0x80cd, 0xd9 }, 511 { 0x80ce, 0x6f }, 512 { 0x80cf, 0xf9 }, 513 { 0x80d0, 0x70 }, 514 { 0x80d1, 0xdf }, 515 { 0x80d2, 0xf7 }, 516 { 0x80d3, 0xc2 }, 517 { 0x80d4, 0xdf }, 518 { 0x80d5, 0x02 }, 519 { 0x80d6, 0x9a }, 520 { 0x80d7, 0xd0 }, 521 { 0x8250, 0x0d }, 522 { 0x8251, 0xcd }, 523 { 0x8252, 0xe0 }, 524 { 0x8253, 0x05 }, 525 { 0x8254, 0xa7 }, 526 { 0x8255, 0xff }, 527 { 0x8256, 0xed }, 528 { 0x8257, 0x5b }, 529 { 0x8258, 0xae }, 530 { 0x8259, 0xe6 }, 531 { 0x825a, 0x3d }, 532 { 0x825b, 0x0f }, 533 { 0x825c, 0x0d }, 534 { 0x825d, 0xea }, 535 { 0x825e, 0xf2 }, 536 { 0x825f, 0x51 }, 537 { 0x8260, 0xf5 }, 538 { 0x8261, 0x06 }, 539 { 0x821a, 0x01 }, 540 { 0x8546, 0x40 }, 541 { 0x8210, 0x26 }, 542 { 0x8211, 0xf6 }, 543 { 0x8212, 0x84 }, 544 { 0x8213, 0x02 }, 545 { 0x8502, 0x01 }, 546 { 0x8121, 0x04 }, 547 { 0x8122, 0x04 }, 548 { 0x852e, 0x10 }, 549 { 0x80a4, 0xca }, 550 { 0x80a7, 0x40 }, 551 { 0x8526, 0x01 }, 552 }; 553 554 static int au8522_enable_modulation(struct dvb_frontend *fe, 555 enum fe_modulation m) 556 { 557 struct au8522_state *state = fe->demodulator_priv; 558 int i; 559 560 dprintk("%s(0x%08x)\n", __func__, m); 561 562 switch (m) { 563 case VSB_8: 564 dprintk("%s() VSB_8\n", __func__); 565 for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) 566 au8522_writereg(state, 567 VSB_mod_tab[i].reg, 568 VSB_mod_tab[i].data); 569 au8522_set_if(fe, state->config->vsb_if); 570 break; 571 case QAM_64: 572 dprintk("%s() QAM 64\n", __func__); 573 for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++) 574 au8522_writereg(state, 575 QAM64_mod_tab[i].reg, 576 QAM64_mod_tab[i].data); 577 au8522_set_if(fe, state->config->qam_if); 578 break; 579 case QAM_256: 580 if (zv_mode) { 581 dprintk("%s() QAM 256 (zv_mode)\n", __func__); 582 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++) 583 au8522_writereg(state, 584 QAM256_mod_tab_zv_mode[i].reg, 585 QAM256_mod_tab_zv_mode[i].data); 586 au8522_set_if(fe, state->config->qam_if); 587 msleep(100); 588 au8522_writereg(state, 0x821a, 0x00); 589 } else { 590 dprintk("%s() QAM 256\n", __func__); 591 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++) 592 au8522_writereg(state, 593 QAM256_mod_tab[i].reg, 594 QAM256_mod_tab[i].data); 595 au8522_set_if(fe, state->config->qam_if); 596 } 597 break; 598 default: 599 dprintk("%s() Invalid modulation\n", __func__); 600 return -EINVAL; 601 } 602 603 state->current_modulation = m; 604 605 return 0; 606 } 607 608 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ 609 static int au8522_set_frontend(struct dvb_frontend *fe) 610 { 611 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 612 struct au8522_state *state = fe->demodulator_priv; 613 int ret = -EINVAL; 614 615 dprintk("%s(frequency=%d)\n", __func__, c->frequency); 616 617 if ((state->current_frequency == c->frequency) && 618 (state->current_modulation == c->modulation)) 619 return 0; 620 621 if (fe->ops.tuner_ops.set_params) { 622 if (fe->ops.i2c_gate_ctrl) 623 fe->ops.i2c_gate_ctrl(fe, 1); 624 ret = fe->ops.tuner_ops.set_params(fe); 625 if (fe->ops.i2c_gate_ctrl) 626 fe->ops.i2c_gate_ctrl(fe, 0); 627 } 628 629 if (ret < 0) 630 return ret; 631 632 /* Allow the tuner to settle */ 633 if (zv_mode) { 634 dprintk("%s() increase tuner settling time for zv_mode\n", 635 __func__); 636 msleep(250); 637 } else 638 msleep(100); 639 640 au8522_enable_modulation(fe, c->modulation); 641 642 state->current_frequency = c->frequency; 643 644 return 0; 645 } 646 647 static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status) 648 { 649 struct au8522_state *state = fe->demodulator_priv; 650 u8 reg; 651 u32 tuner_status = 0; 652 653 *status = 0; 654 655 if (state->current_modulation == VSB_8) { 656 dprintk("%s() Checking VSB_8\n", __func__); 657 reg = au8522_readreg(state, 0x4088); 658 if ((reg & 0x03) == 0x03) 659 *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; 660 } else { 661 dprintk("%s() Checking QAM\n", __func__); 662 reg = au8522_readreg(state, 0x4541); 663 if (reg & 0x80) 664 *status |= FE_HAS_VITERBI; 665 if (reg & 0x20) 666 *status |= FE_HAS_LOCK | FE_HAS_SYNC; 667 } 668 669 switch (state->config->status_mode) { 670 case AU8522_DEMODLOCKING: 671 dprintk("%s() DEMODLOCKING\n", __func__); 672 if (*status & FE_HAS_VITERBI) 673 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 674 break; 675 case AU8522_TUNERLOCKING: 676 /* Get the tuner status */ 677 dprintk("%s() TUNERLOCKING\n", __func__); 678 if (fe->ops.tuner_ops.get_status) { 679 if (fe->ops.i2c_gate_ctrl) 680 fe->ops.i2c_gate_ctrl(fe, 1); 681 682 fe->ops.tuner_ops.get_status(fe, &tuner_status); 683 684 if (fe->ops.i2c_gate_ctrl) 685 fe->ops.i2c_gate_ctrl(fe, 0); 686 } 687 if (tuner_status) 688 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; 689 break; 690 } 691 state->fe_status = *status; 692 693 if (*status & FE_HAS_LOCK) 694 /* turn on LED, if it isn't on already */ 695 au8522_led_ctrl(state, -1); 696 else 697 /* turn off LED */ 698 au8522_led_ctrl(state, 0); 699 700 dprintk("%s() status 0x%08x\n", __func__, *status); 701 702 return 0; 703 } 704 705 static int au8522_led_status(struct au8522_state *state, const u16 *snr) 706 { 707 struct au8522_led_config *led_config = state->config->led_cfg; 708 int led; 709 u16 strong; 710 711 /* bail out if we can't control an LED */ 712 if (!led_config) 713 return 0; 714 715 if (0 == (state->fe_status & FE_HAS_LOCK)) 716 return au8522_led_ctrl(state, 0); 717 else if (state->current_modulation == QAM_256) 718 strong = led_config->qam256_strong; 719 else if (state->current_modulation == QAM_64) 720 strong = led_config->qam64_strong; 721 else /* (state->current_modulation == VSB_8) */ 722 strong = led_config->vsb8_strong; 723 724 if (*snr >= strong) 725 led = 2; 726 else 727 led = 1; 728 729 if ((state->led_state) && 730 (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) 731 /* snr didn't change enough to bother 732 * changing the color of the led */ 733 return 0; 734 735 return au8522_led_ctrl(state, led); 736 } 737 738 static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) 739 { 740 struct au8522_state *state = fe->demodulator_priv; 741 int ret = -EINVAL; 742 743 dprintk("%s()\n", __func__); 744 745 if (state->current_modulation == QAM_256) 746 ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, 747 ARRAY_SIZE(qam256_mse2snr_tab), 748 au8522_readreg(state, 0x4522), 749 snr); 750 else if (state->current_modulation == QAM_64) 751 ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, 752 ARRAY_SIZE(qam64_mse2snr_tab), 753 au8522_readreg(state, 0x4522), 754 snr); 755 else /* VSB_8 */ 756 ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, 757 ARRAY_SIZE(vsb_mse2snr_tab), 758 au8522_readreg(state, 0x4311), 759 snr); 760 761 if (state->config->led_cfg) 762 au8522_led_status(state, snr); 763 764 return ret; 765 } 766 767 static int au8522_read_signal_strength(struct dvb_frontend *fe, 768 u16 *signal_strength) 769 { 770 /* borrowed from lgdt330x.c 771 * 772 * Calculate strength from SNR up to 35dB 773 * Even though the SNR can go higher than 35dB, 774 * there is some comfort factor in having a range of 775 * strong signals that can show at 100% 776 */ 777 u16 snr; 778 u32 tmp; 779 int ret = au8522_read_snr(fe, &snr); 780 781 *signal_strength = 0; 782 783 if (0 == ret) { 784 /* The following calculation method was chosen 785 * purely for the sake of code re-use from the 786 * other demod drivers that use this method */ 787 788 /* Convert from SNR in dB * 10 to 8.24 fixed-point */ 789 tmp = (snr * ((1 << 24) / 10)); 790 791 /* Convert from 8.24 fixed-point to 792 * scale the range 0 - 35*2^24 into 0 - 65535*/ 793 if (tmp >= 8960 * 0x10000) 794 *signal_strength = 0xffff; 795 else 796 *signal_strength = tmp / 8960; 797 } 798 799 return ret; 800 } 801 802 static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 803 { 804 struct au8522_state *state = fe->demodulator_priv; 805 806 if (state->current_modulation == VSB_8) 807 *ucblocks = au8522_readreg(state, 0x4087); 808 else 809 *ucblocks = au8522_readreg(state, 0x4543); 810 811 return 0; 812 } 813 814 static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) 815 { 816 return au8522_read_ucblocks(fe, ber); 817 } 818 819 static int au8522_get_frontend(struct dvb_frontend *fe) 820 { 821 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 822 struct au8522_state *state = fe->demodulator_priv; 823 824 c->frequency = state->current_frequency; 825 c->modulation = state->current_modulation; 826 827 return 0; 828 } 829 830 static int au8522_get_tune_settings(struct dvb_frontend *fe, 831 struct dvb_frontend_tune_settings *tune) 832 { 833 tune->min_delay_ms = 1000; 834 return 0; 835 } 836 837 static struct dvb_frontend_ops au8522_ops; 838 839 840 static void au8522_release(struct dvb_frontend *fe) 841 { 842 struct au8522_state *state = fe->demodulator_priv; 843 au8522_release_state(state); 844 } 845 846 struct dvb_frontend *au8522_attach(const struct au8522_config *config, 847 struct i2c_adapter *i2c) 848 { 849 struct au8522_state *state = NULL; 850 int instance; 851 852 /* allocate memory for the internal state */ 853 instance = au8522_get_state(&state, i2c, config->demod_address); 854 switch (instance) { 855 case 0: 856 dprintk("%s state allocation failed\n", __func__); 857 break; 858 case 1: 859 /* new demod instance */ 860 dprintk("%s using new instance\n", __func__); 861 break; 862 default: 863 /* existing demod instance */ 864 dprintk("%s using existing instance\n", __func__); 865 break; 866 } 867 868 /* setup the state */ 869 state->config = config; 870 state->i2c = i2c; 871 state->operational_mode = AU8522_DIGITAL_MODE; 872 873 /* create dvb_frontend */ 874 memcpy(&state->frontend.ops, &au8522_ops, 875 sizeof(struct dvb_frontend_ops)); 876 state->frontend.demodulator_priv = state; 877 878 state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl; 879 880 if (au8522_init(&state->frontend) != 0) { 881 printk(KERN_ERR "%s: Failed to initialize correctly\n", 882 __func__); 883 goto error; 884 } 885 886 /* Note: Leaving the I2C gate open here. */ 887 au8522_i2c_gate_ctrl(&state->frontend, 1); 888 889 return &state->frontend; 890 891 error: 892 au8522_release_state(state); 893 return NULL; 894 } 895 EXPORT_SYMBOL(au8522_attach); 896 897 static struct dvb_frontend_ops au8522_ops = { 898 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, 899 .info = { 900 .name = "Auvitek AU8522 QAM/8VSB Frontend", 901 .frequency_min = 54000000, 902 .frequency_max = 858000000, 903 .frequency_stepsize = 62500, 904 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB 905 }, 906 907 .init = au8522_init, 908 .sleep = au8522_sleep, 909 .i2c_gate_ctrl = au8522_i2c_gate_ctrl, 910 .set_frontend = au8522_set_frontend, 911 .get_frontend = au8522_get_frontend, 912 .get_tune_settings = au8522_get_tune_settings, 913 .read_status = au8522_read_status, 914 .read_ber = au8522_read_ber, 915 .read_signal_strength = au8522_read_signal_strength, 916 .read_snr = au8522_read_snr, 917 .read_ucblocks = au8522_read_ucblocks, 918 .release = au8522_release, 919 }; 920 921 module_param(debug, int, 0644); 922 MODULE_PARM_DESC(debug, "Enable verbose debug messages"); 923 924 module_param(zv_mode, int, 0644); 925 MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n" 926 "\t\ton - modified AU8522 QAM256 initialization.\n" 927 "\t\tProvides faster lock when using ZeeVee modulator based sources"); 928 929 MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); 930 MODULE_AUTHOR("Steven Toth"); 931 MODULE_LICENSE("GPL"); 932