1 /* 2 * Fitipower FC0013 tuner driver 3 * 4 * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net> 5 * partially based on driver code from Fitipower 6 * Copyright (C) 2010 Fitipower Integrated Technology Inc 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 */ 19 20 #include "fc0013.h" 21 #include "fc0013-priv.h" 22 23 static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val) 24 { 25 u8 buf[2] = {reg, val}; 26 struct i2c_msg msg = { 27 .addr = priv->addr, .flags = 0, .buf = buf, .len = 2 28 }; 29 30 if (i2c_transfer(priv->i2c, &msg, 1) != 1) { 31 err("I2C write reg failed, reg: %02x, val: %02x", reg, val); 32 return -EREMOTEIO; 33 } 34 return 0; 35 } 36 37 static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val) 38 { 39 struct i2c_msg msg[2] = { 40 { .addr = priv->addr, .flags = 0, .buf = ®, .len = 1 }, 41 { .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 }, 42 }; 43 44 if (i2c_transfer(priv->i2c, msg, 2) != 2) { 45 err("I2C read reg failed, reg: %02x", reg); 46 return -EREMOTEIO; 47 } 48 return 0; 49 } 50 51 static void fc0013_release(struct dvb_frontend *fe) 52 { 53 kfree(fe->tuner_priv); 54 fe->tuner_priv = NULL; 55 } 56 57 static int fc0013_init(struct dvb_frontend *fe) 58 { 59 struct fc0013_priv *priv = fe->tuner_priv; 60 int i, ret = 0; 61 unsigned char reg[] = { 62 0x00, /* reg. 0x00: dummy */ 63 0x09, /* reg. 0x01 */ 64 0x16, /* reg. 0x02 */ 65 0x00, /* reg. 0x03 */ 66 0x00, /* reg. 0x04 */ 67 0x17, /* reg. 0x05 */ 68 0x02, /* reg. 0x06 */ 69 0x0a, /* reg. 0x07: CHECK */ 70 0xff, /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256, 71 Loop Bw 1/8 */ 72 0x6f, /* reg. 0x09: enable LoopThrough */ 73 0xb8, /* reg. 0x0a: Disable LO Test Buffer */ 74 0x82, /* reg. 0x0b: CHECK */ 75 0xfc, /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */ 76 0x01, /* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */ 77 0x00, /* reg. 0x0e */ 78 0x00, /* reg. 0x0f */ 79 0x00, /* reg. 0x10 */ 80 0x00, /* reg. 0x11 */ 81 0x00, /* reg. 0x12 */ 82 0x00, /* reg. 0x13 */ 83 0x50, /* reg. 0x14: DVB-t High Gain, UHF. 84 Middle Gain: 0x48, Low Gain: 0x40 */ 85 0x01, /* reg. 0x15 */ 86 }; 87 88 switch (priv->xtal_freq) { 89 case FC_XTAL_27_MHZ: 90 case FC_XTAL_28_8_MHZ: 91 reg[0x07] |= 0x20; 92 break; 93 case FC_XTAL_36_MHZ: 94 default: 95 break; 96 } 97 98 if (priv->dual_master) 99 reg[0x0c] |= 0x02; 100 101 if (fe->ops.i2c_gate_ctrl) 102 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ 103 104 for (i = 1; i < sizeof(reg); i++) { 105 ret = fc0013_writereg(priv, i, reg[i]); 106 if (ret) 107 break; 108 } 109 110 if (fe->ops.i2c_gate_ctrl) 111 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 112 113 if (ret) 114 err("fc0013_writereg failed: %d", ret); 115 116 return ret; 117 } 118 119 static int fc0013_sleep(struct dvb_frontend *fe) 120 { 121 /* nothing to do here */ 122 return 0; 123 } 124 125 int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val) 126 { 127 struct fc0013_priv *priv = fe->tuner_priv; 128 int ret; 129 u8 rc_cal; 130 int val; 131 132 if (fe->ops.i2c_gate_ctrl) 133 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ 134 135 /* push rc_cal value, get rc_cal value */ 136 ret = fc0013_writereg(priv, 0x10, 0x00); 137 if (ret) 138 goto error_out; 139 140 /* get rc_cal value */ 141 ret = fc0013_readreg(priv, 0x10, &rc_cal); 142 if (ret) 143 goto error_out; 144 145 rc_cal &= 0x0f; 146 147 val = (int)rc_cal + rc_val; 148 149 /* forcing rc_cal */ 150 ret = fc0013_writereg(priv, 0x0d, 0x11); 151 if (ret) 152 goto error_out; 153 154 /* modify rc_cal value */ 155 if (val > 15) 156 ret = fc0013_writereg(priv, 0x10, 0x0f); 157 else if (val < 0) 158 ret = fc0013_writereg(priv, 0x10, 0x00); 159 else 160 ret = fc0013_writereg(priv, 0x10, (u8)val); 161 162 error_out: 163 if (fe->ops.i2c_gate_ctrl) 164 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 165 166 return ret; 167 } 168 EXPORT_SYMBOL(fc0013_rc_cal_add); 169 170 int fc0013_rc_cal_reset(struct dvb_frontend *fe) 171 { 172 struct fc0013_priv *priv = fe->tuner_priv; 173 int ret; 174 175 if (fe->ops.i2c_gate_ctrl) 176 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ 177 178 ret = fc0013_writereg(priv, 0x0d, 0x01); 179 if (!ret) 180 ret = fc0013_writereg(priv, 0x10, 0x00); 181 182 if (fe->ops.i2c_gate_ctrl) 183 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 184 185 return ret; 186 } 187 EXPORT_SYMBOL(fc0013_rc_cal_reset); 188 189 static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq) 190 { 191 int ret; 192 u8 tmp; 193 194 ret = fc0013_readreg(priv, 0x1d, &tmp); 195 if (ret) 196 goto error_out; 197 tmp &= 0xe3; 198 if (freq <= 177500) { /* VHF Track: 7 */ 199 ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c); 200 } else if (freq <= 184500) { /* VHF Track: 6 */ 201 ret = fc0013_writereg(priv, 0x1d, tmp | 0x18); 202 } else if (freq <= 191500) { /* VHF Track: 5 */ 203 ret = fc0013_writereg(priv, 0x1d, tmp | 0x14); 204 } else if (freq <= 198500) { /* VHF Track: 4 */ 205 ret = fc0013_writereg(priv, 0x1d, tmp | 0x10); 206 } else if (freq <= 205500) { /* VHF Track: 3 */ 207 ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c); 208 } else if (freq <= 219500) { /* VHF Track: 2 */ 209 ret = fc0013_writereg(priv, 0x1d, tmp | 0x08); 210 } else if (freq < 300000) { /* VHF Track: 1 */ 211 ret = fc0013_writereg(priv, 0x1d, tmp | 0x04); 212 } else { /* UHF and GPS */ 213 ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c); 214 } 215 error_out: 216 return ret; 217 } 218 219 static int fc0013_set_params(struct dvb_frontend *fe) 220 { 221 struct fc0013_priv *priv = fe->tuner_priv; 222 int i, ret = 0; 223 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 224 u32 freq = p->frequency / 1000; 225 u32 delsys = p->delivery_system; 226 unsigned char reg[7], am, pm, multi, tmp; 227 unsigned long f_vco; 228 unsigned short xtal_freq_khz_2, xin, xdiv; 229 bool vco_select = false; 230 231 if (fe->callback) { 232 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER, 233 FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1)); 234 if (ret) 235 goto exit; 236 } 237 238 switch (priv->xtal_freq) { 239 case FC_XTAL_27_MHZ: 240 xtal_freq_khz_2 = 27000 / 2; 241 break; 242 case FC_XTAL_36_MHZ: 243 xtal_freq_khz_2 = 36000 / 2; 244 break; 245 case FC_XTAL_28_8_MHZ: 246 default: 247 xtal_freq_khz_2 = 28800 / 2; 248 break; 249 } 250 251 if (fe->ops.i2c_gate_ctrl) 252 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ 253 254 /* set VHF track */ 255 ret = fc0013_set_vhf_track(priv, freq); 256 if (ret) 257 goto exit; 258 259 if (freq < 300000) { 260 /* enable VHF filter */ 261 ret = fc0013_readreg(priv, 0x07, &tmp); 262 if (ret) 263 goto exit; 264 ret = fc0013_writereg(priv, 0x07, tmp | 0x10); 265 if (ret) 266 goto exit; 267 268 /* disable UHF & disable GPS */ 269 ret = fc0013_readreg(priv, 0x14, &tmp); 270 if (ret) 271 goto exit; 272 ret = fc0013_writereg(priv, 0x14, tmp & 0x1f); 273 if (ret) 274 goto exit; 275 } else if (freq <= 862000) { 276 /* disable VHF filter */ 277 ret = fc0013_readreg(priv, 0x07, &tmp); 278 if (ret) 279 goto exit; 280 ret = fc0013_writereg(priv, 0x07, tmp & 0xef); 281 if (ret) 282 goto exit; 283 284 /* enable UHF & disable GPS */ 285 ret = fc0013_readreg(priv, 0x14, &tmp); 286 if (ret) 287 goto exit; 288 ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40); 289 if (ret) 290 goto exit; 291 } else { 292 /* disable VHF filter */ 293 ret = fc0013_readreg(priv, 0x07, &tmp); 294 if (ret) 295 goto exit; 296 ret = fc0013_writereg(priv, 0x07, tmp & 0xef); 297 if (ret) 298 goto exit; 299 300 /* disable UHF & enable GPS */ 301 ret = fc0013_readreg(priv, 0x14, &tmp); 302 if (ret) 303 goto exit; 304 ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20); 305 if (ret) 306 goto exit; 307 } 308 309 /* select frequency divider and the frequency of VCO */ 310 if (freq < 37084) { /* freq * 96 < 3560000 */ 311 multi = 96; 312 reg[5] = 0x82; 313 reg[6] = 0x00; 314 } else if (freq < 55625) { /* freq * 64 < 3560000 */ 315 multi = 64; 316 reg[5] = 0x02; 317 reg[6] = 0x02; 318 } else if (freq < 74167) { /* freq * 48 < 3560000 */ 319 multi = 48; 320 reg[5] = 0x42; 321 reg[6] = 0x00; 322 } else if (freq < 111250) { /* freq * 32 < 3560000 */ 323 multi = 32; 324 reg[5] = 0x82; 325 reg[6] = 0x02; 326 } else if (freq < 148334) { /* freq * 24 < 3560000 */ 327 multi = 24; 328 reg[5] = 0x22; 329 reg[6] = 0x00; 330 } else if (freq < 222500) { /* freq * 16 < 3560000 */ 331 multi = 16; 332 reg[5] = 0x42; 333 reg[6] = 0x02; 334 } else if (freq < 296667) { /* freq * 12 < 3560000 */ 335 multi = 12; 336 reg[5] = 0x12; 337 reg[6] = 0x00; 338 } else if (freq < 445000) { /* freq * 8 < 3560000 */ 339 multi = 8; 340 reg[5] = 0x22; 341 reg[6] = 0x02; 342 } else if (freq < 593334) { /* freq * 6 < 3560000 */ 343 multi = 6; 344 reg[5] = 0x0a; 345 reg[6] = 0x00; 346 } else if (freq < 950000) { /* freq * 4 < 3800000 */ 347 multi = 4; 348 reg[5] = 0x12; 349 reg[6] = 0x02; 350 } else { 351 multi = 2; 352 reg[5] = 0x0a; 353 reg[6] = 0x02; 354 } 355 356 f_vco = freq * multi; 357 358 if (f_vco >= 3060000) { 359 reg[6] |= 0x08; 360 vco_select = true; 361 } 362 363 if (freq >= 45000) { 364 /* From divided value (XDIV) determined the FA and FP value */ 365 xdiv = (unsigned short)(f_vco / xtal_freq_khz_2); 366 if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2)) 367 xdiv++; 368 369 pm = (unsigned char)(xdiv / 8); 370 am = (unsigned char)(xdiv - (8 * pm)); 371 372 if (am < 2) { 373 reg[1] = am + 8; 374 reg[2] = pm - 1; 375 } else { 376 reg[1] = am; 377 reg[2] = pm; 378 } 379 } else { 380 /* fix for frequency less than 45 MHz */ 381 reg[1] = 0x06; 382 reg[2] = 0x11; 383 } 384 385 /* fix clock out */ 386 reg[6] |= 0x20; 387 388 /* From VCO frequency determines the XIN ( fractional part of Delta 389 Sigma PLL) and divided value (XDIV) */ 390 xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2); 391 xin = (xin << 15) / xtal_freq_khz_2; 392 if (xin >= 16384) 393 xin += 32768; 394 395 reg[3] = xin >> 8; 396 reg[4] = xin & 0xff; 397 398 if (delsys == SYS_DVBT) { 399 reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */ 400 switch (p->bandwidth_hz) { 401 case 6000000: 402 reg[6] |= 0x80; 403 break; 404 case 7000000: 405 reg[6] |= 0x40; 406 break; 407 case 8000000: 408 default: 409 break; 410 } 411 } else { 412 err("%s: modulation type not supported!", __func__); 413 return -EINVAL; 414 } 415 416 /* modified for Realtek demod */ 417 reg[5] |= 0x07; 418 419 for (i = 1; i <= 6; i++) { 420 ret = fc0013_writereg(priv, i, reg[i]); 421 if (ret) 422 goto exit; 423 } 424 425 ret = fc0013_readreg(priv, 0x11, &tmp); 426 if (ret) 427 goto exit; 428 if (multi == 64) 429 ret = fc0013_writereg(priv, 0x11, tmp | 0x04); 430 else 431 ret = fc0013_writereg(priv, 0x11, tmp & 0xfb); 432 if (ret) 433 goto exit; 434 435 /* VCO Calibration */ 436 ret = fc0013_writereg(priv, 0x0e, 0x80); 437 if (!ret) 438 ret = fc0013_writereg(priv, 0x0e, 0x00); 439 440 /* VCO Re-Calibration if needed */ 441 if (!ret) 442 ret = fc0013_writereg(priv, 0x0e, 0x00); 443 444 if (!ret) { 445 msleep(10); 446 ret = fc0013_readreg(priv, 0x0e, &tmp); 447 } 448 if (ret) 449 goto exit; 450 451 /* vco selection */ 452 tmp &= 0x3f; 453 454 if (vco_select) { 455 if (tmp > 0x3c) { 456 reg[6] &= ~0x08; 457 ret = fc0013_writereg(priv, 0x06, reg[6]); 458 if (!ret) 459 ret = fc0013_writereg(priv, 0x0e, 0x80); 460 if (!ret) 461 ret = fc0013_writereg(priv, 0x0e, 0x00); 462 } 463 } else { 464 if (tmp < 0x02) { 465 reg[6] |= 0x08; 466 ret = fc0013_writereg(priv, 0x06, reg[6]); 467 if (!ret) 468 ret = fc0013_writereg(priv, 0x0e, 0x80); 469 if (!ret) 470 ret = fc0013_writereg(priv, 0x0e, 0x00); 471 } 472 } 473 474 priv->frequency = p->frequency; 475 priv->bandwidth = p->bandwidth_hz; 476 477 exit: 478 if (fe->ops.i2c_gate_ctrl) 479 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 480 if (ret) 481 warn("%s: failed: %d", __func__, ret); 482 return ret; 483 } 484 485 static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency) 486 { 487 struct fc0013_priv *priv = fe->tuner_priv; 488 *frequency = priv->frequency; 489 return 0; 490 } 491 492 static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 493 { 494 /* always ? */ 495 *frequency = 0; 496 return 0; 497 } 498 499 static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) 500 { 501 struct fc0013_priv *priv = fe->tuner_priv; 502 *bandwidth = priv->bandwidth; 503 return 0; 504 } 505 506 #define INPUT_ADC_LEVEL -8 507 508 static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength) 509 { 510 struct fc0013_priv *priv = fe->tuner_priv; 511 int ret; 512 unsigned char tmp; 513 int int_temp, lna_gain, int_lna, tot_agc_gain, power; 514 static const int fc0013_lna_gain_table[] = { 515 /* low gain */ 516 -63, -58, -99, -73, 517 -63, -65, -54, -60, 518 /* middle gain */ 519 71, 70, 68, 67, 520 65, 63, 61, 58, 521 /* high gain */ 522 197, 191, 188, 186, 523 184, 182, 181, 179, 524 }; 525 526 if (fe->ops.i2c_gate_ctrl) 527 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ 528 529 ret = fc0013_writereg(priv, 0x13, 0x00); 530 if (ret) 531 goto err; 532 533 ret = fc0013_readreg(priv, 0x13, &tmp); 534 if (ret) 535 goto err; 536 int_temp = tmp; 537 538 ret = fc0013_readreg(priv, 0x14, &tmp); 539 if (ret) 540 goto err; 541 lna_gain = tmp & 0x1f; 542 543 if (fe->ops.i2c_gate_ctrl) 544 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 545 546 if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) { 547 int_lna = fc0013_lna_gain_table[lna_gain]; 548 tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 + 549 (int_temp & 0x1f)) * 2; 550 power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10; 551 552 if (power >= 45) 553 *strength = 255; /* 100% */ 554 else if (power < -95) 555 *strength = 0; 556 else 557 *strength = (power + 95) * 255 / 140; 558 559 *strength |= *strength << 8; 560 } else { 561 ret = -1; 562 } 563 564 goto exit; 565 566 err: 567 if (fe->ops.i2c_gate_ctrl) 568 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ 569 exit: 570 if (ret) 571 warn("%s: failed: %d", __func__, ret); 572 return ret; 573 } 574 575 static const struct dvb_tuner_ops fc0013_tuner_ops = { 576 .info = { 577 .name = "Fitipower FC0013", 578 579 .frequency_min = 37000000, /* estimate */ 580 .frequency_max = 1680000000, /* CHECK */ 581 .frequency_step = 0, 582 }, 583 584 .release = fc0013_release, 585 586 .init = fc0013_init, 587 .sleep = fc0013_sleep, 588 589 .set_params = fc0013_set_params, 590 591 .get_frequency = fc0013_get_frequency, 592 .get_if_frequency = fc0013_get_if_frequency, 593 .get_bandwidth = fc0013_get_bandwidth, 594 595 .get_rf_strength = fc0013_get_rf_strength, 596 }; 597 598 struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe, 599 struct i2c_adapter *i2c, u8 i2c_address, int dual_master, 600 enum fc001x_xtal_freq xtal_freq) 601 { 602 struct fc0013_priv *priv = NULL; 603 604 priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL); 605 if (priv == NULL) 606 return NULL; 607 608 priv->i2c = i2c; 609 priv->dual_master = dual_master; 610 priv->addr = i2c_address; 611 priv->xtal_freq = xtal_freq; 612 613 info("Fitipower FC0013 successfully attached."); 614 615 fe->tuner_priv = priv; 616 617 memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops, 618 sizeof(struct dvb_tuner_ops)); 619 620 return fe; 621 } 622 EXPORT_SYMBOL(fc0013_attach); 623 624 MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver"); 625 MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>"); 626 MODULE_LICENSE("GPL"); 627 MODULE_VERSION("0.2"); 628