1 /* 2 * FCI FC2580 silicon tuner driver 3 * 4 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi> 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 along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19 */ 20 21 #include "fc2580_priv.h" 22 23 /* 24 * TODO: 25 * I2C write and read works only for one single register. Multiple registers 26 * could not be accessed using normal register address auto-increment. 27 * There could be (very likely) register to change that behavior.... 28 */ 29 30 /* write single register conditionally only when value differs from 0xff 31 * XXX: This is special routine meant only for writing fc2580_freq_regs_lut[] 32 * values. Do not use for the other purposes. */ 33 static int fc2580_wr_reg_ff(struct fc2580_dev *dev, u8 reg, u8 val) 34 { 35 if (val == 0xff) 36 return 0; 37 else 38 return regmap_write(dev->regmap, reg, val); 39 } 40 41 static int fc2580_set_params(struct fc2580_dev *dev) 42 { 43 struct i2c_client *client = dev->client; 44 int ret, i; 45 unsigned int uitmp, div_ref, div_ref_val, div_n, k, k_cw, div_out; 46 u64 f_vco; 47 u8 synth_config; 48 unsigned long timeout; 49 50 if (!dev->active) { 51 dev_dbg(&client->dev, "tuner is sleeping\n"); 52 return 0; 53 } 54 55 /* 56 * Fractional-N synthesizer 57 * 58 * +---------------------------------------+ 59 * v | 60 * Fref +----+ +----+ +-------+ +----+ +------+ +---+ 61 * ------> | /R | --> | PD | --> | VCO | ------> | /2 | --> | /N.F | <-- | K | 62 * +----+ +----+ +-------+ +----+ +------+ +---+ 63 * | 64 * | 65 * v 66 * +-------+ Fout 67 * | /Rout | ------> 68 * +-------+ 69 */ 70 for (i = 0; i < ARRAY_SIZE(fc2580_pll_lut); i++) { 71 if (dev->f_frequency <= fc2580_pll_lut[i].freq) 72 break; 73 } 74 if (i == ARRAY_SIZE(fc2580_pll_lut)) { 75 ret = -EINVAL; 76 goto err; 77 } 78 79 #define DIV_PRE_N 2 80 #define F_REF dev->clk 81 div_out = fc2580_pll_lut[i].div_out; 82 f_vco = (u64) dev->f_frequency * div_out; 83 synth_config = fc2580_pll_lut[i].band; 84 if (f_vco < 2600000000ULL) 85 synth_config |= 0x06; 86 else 87 synth_config |= 0x0e; 88 89 /* select reference divider R (keep PLL div N in valid range) */ 90 #define DIV_N_MIN 76 91 if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 1)) { 92 div_ref = 1; 93 div_ref_val = 0x00; 94 } else if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 2)) { 95 div_ref = 2; 96 div_ref_val = 0x10; 97 } else { 98 div_ref = 4; 99 div_ref_val = 0x20; 100 } 101 102 /* calculate PLL integer and fractional control word */ 103 uitmp = DIV_PRE_N * F_REF / div_ref; 104 div_n = div_u64_rem(f_vco, uitmp, &k); 105 k_cw = div_u64((u64) k * 0x100000, uitmp); 106 107 dev_dbg(&client->dev, 108 "frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_ref=%u div_n=%u k=%u div_out=%u k_cw=%0x\n", 109 dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_ref, 110 div_n, k, div_out, k_cw); 111 112 ret = regmap_write(dev->regmap, 0x02, synth_config); 113 if (ret) 114 goto err; 115 116 ret = regmap_write(dev->regmap, 0x18, div_ref_val << 0 | k_cw >> 16); 117 if (ret) 118 goto err; 119 120 ret = regmap_write(dev->regmap, 0x1a, (k_cw >> 8) & 0xff); 121 if (ret) 122 goto err; 123 124 ret = regmap_write(dev->regmap, 0x1b, (k_cw >> 0) & 0xff); 125 if (ret) 126 goto err; 127 128 ret = regmap_write(dev->regmap, 0x1c, div_n); 129 if (ret) 130 goto err; 131 132 /* registers */ 133 for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) { 134 if (dev->f_frequency <= fc2580_freq_regs_lut[i].freq) 135 break; 136 } 137 if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) { 138 ret = -EINVAL; 139 goto err; 140 } 141 142 ret = fc2580_wr_reg_ff(dev, 0x25, fc2580_freq_regs_lut[i].r25_val); 143 if (ret) 144 goto err; 145 146 ret = fc2580_wr_reg_ff(dev, 0x27, fc2580_freq_regs_lut[i].r27_val); 147 if (ret) 148 goto err; 149 150 ret = fc2580_wr_reg_ff(dev, 0x28, fc2580_freq_regs_lut[i].r28_val); 151 if (ret) 152 goto err; 153 154 ret = fc2580_wr_reg_ff(dev, 0x29, fc2580_freq_regs_lut[i].r29_val); 155 if (ret) 156 goto err; 157 158 ret = fc2580_wr_reg_ff(dev, 0x2b, fc2580_freq_regs_lut[i].r2b_val); 159 if (ret) 160 goto err; 161 162 ret = fc2580_wr_reg_ff(dev, 0x2c, fc2580_freq_regs_lut[i].r2c_val); 163 if (ret) 164 goto err; 165 166 ret = fc2580_wr_reg_ff(dev, 0x2d, fc2580_freq_regs_lut[i].r2d_val); 167 if (ret) 168 goto err; 169 170 ret = fc2580_wr_reg_ff(dev, 0x30, fc2580_freq_regs_lut[i].r30_val); 171 if (ret) 172 goto err; 173 174 ret = fc2580_wr_reg_ff(dev, 0x44, fc2580_freq_regs_lut[i].r44_val); 175 if (ret) 176 goto err; 177 178 ret = fc2580_wr_reg_ff(dev, 0x50, fc2580_freq_regs_lut[i].r50_val); 179 if (ret) 180 goto err; 181 182 ret = fc2580_wr_reg_ff(dev, 0x53, fc2580_freq_regs_lut[i].r53_val); 183 if (ret) 184 goto err; 185 186 ret = fc2580_wr_reg_ff(dev, 0x5f, fc2580_freq_regs_lut[i].r5f_val); 187 if (ret) 188 goto err; 189 190 ret = fc2580_wr_reg_ff(dev, 0x61, fc2580_freq_regs_lut[i].r61_val); 191 if (ret) 192 goto err; 193 194 ret = fc2580_wr_reg_ff(dev, 0x62, fc2580_freq_regs_lut[i].r62_val); 195 if (ret) 196 goto err; 197 198 ret = fc2580_wr_reg_ff(dev, 0x63, fc2580_freq_regs_lut[i].r63_val); 199 if (ret) 200 goto err; 201 202 ret = fc2580_wr_reg_ff(dev, 0x67, fc2580_freq_regs_lut[i].r67_val); 203 if (ret) 204 goto err; 205 206 ret = fc2580_wr_reg_ff(dev, 0x68, fc2580_freq_regs_lut[i].r68_val); 207 if (ret) 208 goto err; 209 210 ret = fc2580_wr_reg_ff(dev, 0x69, fc2580_freq_regs_lut[i].r69_val); 211 if (ret) 212 goto err; 213 214 ret = fc2580_wr_reg_ff(dev, 0x6a, fc2580_freq_regs_lut[i].r6a_val); 215 if (ret) 216 goto err; 217 218 ret = fc2580_wr_reg_ff(dev, 0x6b, fc2580_freq_regs_lut[i].r6b_val); 219 if (ret) 220 goto err; 221 222 ret = fc2580_wr_reg_ff(dev, 0x6c, fc2580_freq_regs_lut[i].r6c_val); 223 if (ret) 224 goto err; 225 226 ret = fc2580_wr_reg_ff(dev, 0x6d, fc2580_freq_regs_lut[i].r6d_val); 227 if (ret) 228 goto err; 229 230 ret = fc2580_wr_reg_ff(dev, 0x6e, fc2580_freq_regs_lut[i].r6e_val); 231 if (ret) 232 goto err; 233 234 ret = fc2580_wr_reg_ff(dev, 0x6f, fc2580_freq_regs_lut[i].r6f_val); 235 if (ret) 236 goto err; 237 238 /* IF filters */ 239 for (i = 0; i < ARRAY_SIZE(fc2580_if_filter_lut); i++) { 240 if (dev->f_bandwidth <= fc2580_if_filter_lut[i].freq) 241 break; 242 } 243 if (i == ARRAY_SIZE(fc2580_if_filter_lut)) { 244 ret = -EINVAL; 245 goto err; 246 } 247 248 ret = regmap_write(dev->regmap, 0x36, fc2580_if_filter_lut[i].r36_val); 249 if (ret) 250 goto err; 251 252 uitmp = (unsigned int) 8058000 - (dev->f_bandwidth * 122 / 100 / 2); 253 uitmp = div64_u64((u64) dev->clk * uitmp, 1000000000000ULL); 254 ret = regmap_write(dev->regmap, 0x37, uitmp); 255 if (ret) 256 goto err; 257 258 ret = regmap_write(dev->regmap, 0x39, fc2580_if_filter_lut[i].r39_val); 259 if (ret) 260 goto err; 261 262 timeout = jiffies + msecs_to_jiffies(30); 263 for (uitmp = ~0xc0; !time_after(jiffies, timeout) && uitmp != 0xc0;) { 264 /* trigger filter */ 265 ret = regmap_write(dev->regmap, 0x2e, 0x09); 266 if (ret) 267 goto err; 268 269 /* locked when [7:6] are set (val: d7 6MHz, d5 7MHz, cd 8MHz) */ 270 ret = regmap_read(dev->regmap, 0x2f, &uitmp); 271 if (ret) 272 goto err; 273 uitmp &= 0xc0; 274 275 ret = regmap_write(dev->regmap, 0x2e, 0x01); 276 if (ret) 277 goto err; 278 } 279 if (uitmp != 0xc0) 280 dev_dbg(&client->dev, "filter did not lock %02x\n", uitmp); 281 282 return 0; 283 err: 284 dev_dbg(&client->dev, "failed=%d\n", ret); 285 return ret; 286 } 287 288 static int fc2580_init(struct fc2580_dev *dev) 289 { 290 struct i2c_client *client = dev->client; 291 int ret, i; 292 293 dev_dbg(&client->dev, "\n"); 294 295 for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) { 296 ret = regmap_write(dev->regmap, fc2580_init_reg_vals[i].reg, 297 fc2580_init_reg_vals[i].val); 298 if (ret) 299 goto err; 300 } 301 302 dev->active = true; 303 return 0; 304 err: 305 dev_dbg(&client->dev, "failed=%d\n", ret); 306 return ret; 307 } 308 309 static int fc2580_sleep(struct fc2580_dev *dev) 310 { 311 struct i2c_client *client = dev->client; 312 int ret; 313 314 dev_dbg(&client->dev, "\n"); 315 316 dev->active = false; 317 318 ret = regmap_write(dev->regmap, 0x02, 0x0a); 319 if (ret) 320 goto err; 321 return 0; 322 err: 323 dev_dbg(&client->dev, "failed=%d\n", ret); 324 return ret; 325 } 326 327 /* 328 * DVB API 329 */ 330 static int fc2580_dvb_set_params(struct dvb_frontend *fe) 331 { 332 struct fc2580_dev *dev = fe->tuner_priv; 333 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 334 335 dev->f_frequency = c->frequency; 336 dev->f_bandwidth = c->bandwidth_hz; 337 return fc2580_set_params(dev); 338 } 339 340 static int fc2580_dvb_init(struct dvb_frontend *fe) 341 { 342 return fc2580_init(fe->tuner_priv); 343 } 344 345 static int fc2580_dvb_sleep(struct dvb_frontend *fe) 346 { 347 return fc2580_sleep(fe->tuner_priv); 348 } 349 350 static int fc2580_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 351 { 352 *frequency = 0; /* Zero-IF */ 353 return 0; 354 } 355 356 static const struct dvb_tuner_ops fc2580_dvb_tuner_ops = { 357 .info = { 358 .name = "FCI FC2580", 359 .frequency_min_hz = 174 * MHz, 360 .frequency_max_hz = 862 * MHz, 361 }, 362 363 .init = fc2580_dvb_init, 364 .sleep = fc2580_dvb_sleep, 365 .set_params = fc2580_dvb_set_params, 366 367 .get_if_frequency = fc2580_dvb_get_if_frequency, 368 }; 369 370 /* 371 * V4L2 API 372 */ 373 #if IS_ENABLED(CONFIG_VIDEO_V4L2) 374 static const struct v4l2_frequency_band bands[] = { 375 { 376 .type = V4L2_TUNER_RF, 377 .index = 0, 378 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, 379 .rangelow = 130000000, 380 .rangehigh = 2000000000, 381 }, 382 }; 383 384 static inline struct fc2580_dev *fc2580_subdev_to_dev(struct v4l2_subdev *sd) 385 { 386 return container_of(sd, struct fc2580_dev, subdev); 387 } 388 389 static int fc2580_standby(struct v4l2_subdev *sd) 390 { 391 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 392 int ret; 393 394 ret = fc2580_sleep(dev); 395 if (ret) 396 return ret; 397 398 return fc2580_set_params(dev); 399 } 400 401 static int fc2580_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v) 402 { 403 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 404 struct i2c_client *client = dev->client; 405 406 dev_dbg(&client->dev, "index=%d\n", v->index); 407 408 strscpy(v->name, "FCI FC2580", sizeof(v->name)); 409 v->type = V4L2_TUNER_RF; 410 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; 411 v->rangelow = bands[0].rangelow; 412 v->rangehigh = bands[0].rangehigh; 413 return 0; 414 } 415 416 static int fc2580_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v) 417 { 418 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 419 struct i2c_client *client = dev->client; 420 421 dev_dbg(&client->dev, "index=%d\n", v->index); 422 return 0; 423 } 424 425 static int fc2580_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) 426 { 427 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 428 struct i2c_client *client = dev->client; 429 430 dev_dbg(&client->dev, "tuner=%d\n", f->tuner); 431 f->frequency = dev->f_frequency; 432 return 0; 433 } 434 435 static int fc2580_s_frequency(struct v4l2_subdev *sd, 436 const struct v4l2_frequency *f) 437 { 438 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 439 struct i2c_client *client = dev->client; 440 441 dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n", 442 f->tuner, f->type, f->frequency); 443 444 dev->f_frequency = clamp_t(unsigned int, f->frequency, 445 bands[0].rangelow, bands[0].rangehigh); 446 return fc2580_set_params(dev); 447 } 448 449 static int fc2580_enum_freq_bands(struct v4l2_subdev *sd, 450 struct v4l2_frequency_band *band) 451 { 452 struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); 453 struct i2c_client *client = dev->client; 454 455 dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n", 456 band->tuner, band->type, band->index); 457 458 if (band->index >= ARRAY_SIZE(bands)) 459 return -EINVAL; 460 461 band->capability = bands[band->index].capability; 462 band->rangelow = bands[band->index].rangelow; 463 band->rangehigh = bands[band->index].rangehigh; 464 return 0; 465 } 466 467 static const struct v4l2_subdev_tuner_ops fc2580_subdev_tuner_ops = { 468 .standby = fc2580_standby, 469 .g_tuner = fc2580_g_tuner, 470 .s_tuner = fc2580_s_tuner, 471 .g_frequency = fc2580_g_frequency, 472 .s_frequency = fc2580_s_frequency, 473 .enum_freq_bands = fc2580_enum_freq_bands, 474 }; 475 476 static const struct v4l2_subdev_ops fc2580_subdev_ops = { 477 .tuner = &fc2580_subdev_tuner_ops, 478 }; 479 480 static int fc2580_s_ctrl(struct v4l2_ctrl *ctrl) 481 { 482 struct fc2580_dev *dev = container_of(ctrl->handler, struct fc2580_dev, hdl); 483 struct i2c_client *client = dev->client; 484 int ret; 485 486 dev_dbg(&client->dev, "ctrl: id=%d name=%s cur.val=%d val=%d\n", 487 ctrl->id, ctrl->name, ctrl->cur.val, ctrl->val); 488 489 switch (ctrl->id) { 490 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: 491 case V4L2_CID_RF_TUNER_BANDWIDTH: 492 /* 493 * TODO: Auto logic does not work 100% correctly as tuner driver 494 * do not have information to calculate maximum suitable 495 * bandwidth. Calculating it is responsible of master driver. 496 */ 497 dev->f_bandwidth = dev->bandwidth->val; 498 ret = fc2580_set_params(dev); 499 break; 500 default: 501 dev_dbg(&client->dev, "unknown ctrl"); 502 ret = -EINVAL; 503 } 504 return ret; 505 } 506 507 static const struct v4l2_ctrl_ops fc2580_ctrl_ops = { 508 .s_ctrl = fc2580_s_ctrl, 509 }; 510 #endif 511 512 static struct v4l2_subdev *fc2580_get_v4l2_subdev(struct i2c_client *client) 513 { 514 struct fc2580_dev *dev = i2c_get_clientdata(client); 515 516 if (dev->subdev.ops) 517 return &dev->subdev; 518 else 519 return NULL; 520 } 521 522 static int fc2580_probe(struct i2c_client *client, 523 const struct i2c_device_id *id) 524 { 525 struct fc2580_dev *dev; 526 struct fc2580_platform_data *pdata = client->dev.platform_data; 527 struct dvb_frontend *fe = pdata->dvb_frontend; 528 int ret; 529 unsigned int uitmp; 530 static const struct regmap_config regmap_config = { 531 .reg_bits = 8, 532 .val_bits = 8, 533 }; 534 535 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 536 if (!dev) { 537 ret = -ENOMEM; 538 goto err; 539 } 540 541 if (pdata->clk) 542 dev->clk = pdata->clk; 543 else 544 dev->clk = 16384000; /* internal clock */ 545 dev->client = client; 546 dev->regmap = devm_regmap_init_i2c(client, ®map_config); 547 if (IS_ERR(dev->regmap)) { 548 ret = PTR_ERR(dev->regmap); 549 goto err_kfree; 550 } 551 552 /* check if the tuner is there */ 553 ret = regmap_read(dev->regmap, 0x01, &uitmp); 554 if (ret) 555 goto err_kfree; 556 557 dev_dbg(&client->dev, "chip_id=%02x\n", uitmp); 558 559 switch (uitmp) { 560 case 0x56: 561 case 0x5a: 562 break; 563 default: 564 ret = -ENODEV; 565 goto err_kfree; 566 } 567 568 #if IS_ENABLED(CONFIG_VIDEO_V4L2) 569 /* Register controls */ 570 v4l2_ctrl_handler_init(&dev->hdl, 2); 571 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, 572 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 573 0, 1, 1, 1); 574 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, 575 V4L2_CID_RF_TUNER_BANDWIDTH, 576 3000, 10000000, 1, 3000); 577 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false); 578 if (dev->hdl.error) { 579 ret = dev->hdl.error; 580 dev_err(&client->dev, "Could not initialize controls\n"); 581 v4l2_ctrl_handler_free(&dev->hdl); 582 goto err_kfree; 583 } 584 dev->subdev.ctrl_handler = &dev->hdl; 585 dev->f_frequency = bands[0].rangelow; 586 dev->f_bandwidth = dev->bandwidth->val; 587 v4l2_i2c_subdev_init(&dev->subdev, client, &fc2580_subdev_ops); 588 #endif 589 fe->tuner_priv = dev; 590 memcpy(&fe->ops.tuner_ops, &fc2580_dvb_tuner_ops, 591 sizeof(fe->ops.tuner_ops)); 592 pdata->get_v4l2_subdev = fc2580_get_v4l2_subdev; 593 i2c_set_clientdata(client, dev); 594 595 dev_info(&client->dev, "FCI FC2580 successfully identified\n"); 596 return 0; 597 err_kfree: 598 kfree(dev); 599 err: 600 dev_dbg(&client->dev, "failed=%d\n", ret); 601 return ret; 602 } 603 604 static int fc2580_remove(struct i2c_client *client) 605 { 606 struct fc2580_dev *dev = i2c_get_clientdata(client); 607 608 dev_dbg(&client->dev, "\n"); 609 610 #if IS_ENABLED(CONFIG_VIDEO_V4L2) 611 v4l2_ctrl_handler_free(&dev->hdl); 612 #endif 613 kfree(dev); 614 return 0; 615 } 616 617 static const struct i2c_device_id fc2580_id_table[] = { 618 {"fc2580", 0}, 619 {} 620 }; 621 MODULE_DEVICE_TABLE(i2c, fc2580_id_table); 622 623 static struct i2c_driver fc2580_driver = { 624 .driver = { 625 .name = "fc2580", 626 .suppress_bind_attrs = true, 627 }, 628 .probe = fc2580_probe, 629 .remove = fc2580_remove, 630 .id_table = fc2580_id_table, 631 }; 632 633 module_i2c_driver(fc2580_driver); 634 635 MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver"); 636 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 637 MODULE_LICENSE("GPL"); 638