drivers/media/tuners/e4000.c

   1 /*
   2  * Elonics E4000 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 "e4000_priv.h"
  22
  23 static int e4000_init(struct e4000_dev *dev)
  24 {
  25         struct i2c_client *client = dev->client;
  26         int ret;
  27
  28         dev_dbg(&client->dev, "\n");
  29
  30         /* reset */
  31         ret = regmap_write(dev->regmap, 0x00, 0x01);
  32         if (ret)
  33                 goto err;
  34
  35         /* disable output clock */
  36         ret = regmap_write(dev->regmap, 0x06, 0x00);
  37         if (ret)
  38                 goto err;
  39
  40         ret = regmap_write(dev->regmap, 0x7a, 0x96);
  41         if (ret)
  42                 goto err;
  43
  44         /* configure gains */
  45         ret = regmap_bulk_write(dev->regmap, 0x7e, "\x01\xfe", 2);
  46         if (ret)
  47                 goto err;
  48
  49         ret = regmap_write(dev->regmap, 0x82, 0x00);
  50         if (ret)
  51                 goto err;
  52
  53         ret = regmap_write(dev->regmap, 0x24, 0x05);
  54         if (ret)
  55                 goto err;
  56
  57         ret = regmap_bulk_write(dev->regmap, 0x87, "\x20\x01", 2);
  58         if (ret)
  59                 goto err;
  60
  61         ret = regmap_bulk_write(dev->regmap, 0x9f, "\x7f\x07", 2);
  62         if (ret)
  63                 goto err;
  64
  65         /* DC offset control */
  66         ret = regmap_write(dev->regmap, 0x2d, 0x1f);
  67         if (ret)
  68                 goto err;
  69
  70         ret = regmap_bulk_write(dev->regmap, 0x70, "\x01\x01", 2);
  71         if (ret)
  72                 goto err;
  73
  74         /* gain control */
  75         ret = regmap_write(dev->regmap, 0x1a, 0x17);
  76         if (ret)
  77                 goto err;
  78
  79         ret = regmap_write(dev->regmap, 0x1f, 0x1a);
  80         if (ret)
  81                 goto err;
  82
  83         dev->active = true;
  84
  85         return 0;
  86 err:
  87         dev_dbg(&client->dev, "failed=%d\n", ret);
  88         return ret;
  89 }
  90
  91 static int e4000_sleep(struct e4000_dev *dev)
  92 {
  93         struct i2c_client *client = dev->client;
  94         int ret;
  95
  96         dev_dbg(&client->dev, "\n");
  97
  98         dev->active = false;
  99
 100         ret = regmap_write(dev->regmap, 0x00, 0x00);
 101         if (ret)
 102                 goto err;
 103
 104         return 0;
 105 err:
 106         dev_dbg(&client->dev, "failed=%d\n", ret);
 107         return ret;
 108 }
 109
 110 static int e4000_set_params(struct e4000_dev *dev)
 111 {
 112         struct i2c_client *client = dev->client;
 113         int ret, i;
 114         unsigned int div_n, k, k_cw, div_out;
 115         u64 f_vco;
 116         u8 buf[5], i_data[4], q_data[4];
 117
 118         if (!dev->active) {
 119                 dev_dbg(&client->dev, "tuner is sleeping\n");
 120                 return 0;
 121         }
 122
 123         /* gain control manual */
 124         ret = regmap_write(dev->regmap, 0x1a, 0x00);
 125         if (ret)
 126                 goto err;
 127
 128         /*
 129          * Fractional-N synthesizer
 130          *
 131          *           +----------------------------+
 132          *           v                            |
 133          *  Fref   +----+     +-------+         +------+     +---+
 134          * ------> | PD | --> |  VCO  | ------> | /N.F | <-- | K |
 135          *         +----+     +-------+         +------+     +---+
 136          *                      |
 137          *                      |
 138          *                      v
 139          *                    +-------+  Fout
 140          *                    | /Rout | ------>
 141          *                    +-------+
 142          */
 143         for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
 144                 if (dev->f_frequency <= e4000_pll_lut[i].freq)
 145                         break;
 146         }
 147         if (i == ARRAY_SIZE(e4000_pll_lut)) {
 148                 ret = -EINVAL;
 149                 goto err;
 150         }
 151
 152         #define F_REF dev->clk
 153         div_out = e4000_pll_lut[i].div_out;
 154         f_vco = (u64) dev->f_frequency * div_out;
 155         /* calculate PLL integer and fractional control word */
 156         div_n = div_u64_rem(f_vco, F_REF, &k);
 157         k_cw = div_u64((u64) k * 0x10000, F_REF);
 158
 159         dev_dbg(&client->dev,
 160                 "frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_n=%u k=%u k_cw=%04x div_out=%u\n",
 161                 dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_n, k,
 162                 k_cw, div_out);
 163
 164         buf[0] = div_n;
 165         buf[1] = (k_cw >> 0) & 0xff;
 166         buf[2] = (k_cw >> 8) & 0xff;
 167         buf[3] = 0x00;
 168         buf[4] = e4000_pll_lut[i].div_out_reg;
 169         ret = regmap_bulk_write(dev->regmap, 0x09, buf, 5);
 170         if (ret)
 171                 goto err;
 172
 173         /* LNA filter (RF filter) */
 174         for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
 175                 if (dev->f_frequency <= e400_lna_filter_lut[i].freq)
 176                         break;
 177         }
 178         if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
 179                 ret = -EINVAL;
 180                 goto err;
 181         }
 182
 183         ret = regmap_write(dev->regmap, 0x10, e400_lna_filter_lut[i].val);
 184         if (ret)
 185                 goto err;
 186
 187         /* IF filters */
 188         for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
 189                 if (dev->f_bandwidth <= e4000_if_filter_lut[i].freq)
 190                         break;
 191         }
 192         if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
 193                 ret = -EINVAL;
 194                 goto err;
 195         }
 196
 197         buf[0] = e4000_if_filter_lut[i].reg11_val;
 198         buf[1] = e4000_if_filter_lut[i].reg12_val;
 199
 200         ret = regmap_bulk_write(dev->regmap, 0x11, buf, 2);
 201         if (ret)
 202                 goto err;
 203
 204         /* frequency band */
 205         for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
 206                 if (dev->f_frequency <= e4000_band_lut[i].freq)
 207                         break;
 208         }
 209         if (i == ARRAY_SIZE(e4000_band_lut)) {
 210                 ret = -EINVAL;
 211                 goto err;
 212         }
 213
 214         ret = regmap_write(dev->regmap, 0x07, e4000_band_lut[i].reg07_val);
 215         if (ret)
 216                 goto err;
 217
 218         ret = regmap_write(dev->regmap, 0x78, e4000_band_lut[i].reg78_val);
 219         if (ret)
 220                 goto err;
 221
 222         /* DC offset */
 223         for (i = 0; i < 4; i++) {
 224                 if (i == 0)
 225                         ret = regmap_bulk_write(dev->regmap, 0x15, "\x00\x7e\x24", 3);
 226                 else if (i == 1)
 227                         ret = regmap_bulk_write(dev->regmap, 0x15, "\x00\x7f", 2);
 228                 else if (i == 2)
 229                         ret = regmap_bulk_write(dev->regmap, 0x15, "\x01", 1);
 230                 else
 231                         ret = regmap_bulk_write(dev->regmap, 0x16, "\x7e", 1);
 232
 233                 if (ret)
 234                         goto err;
 235
 236                 ret = regmap_write(dev->regmap, 0x29, 0x01);
 237                 if (ret)
 238                         goto err;
 239
 240                 ret = regmap_bulk_read(dev->regmap, 0x2a, buf, 3);
 241                 if (ret)
 242                         goto err;
 243
 244                 i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
 245                 q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
 246         }
 247
 248         swap(q_data[2], q_data[3]);
 249         swap(i_data[2], i_data[3]);
 250
 251         ret = regmap_bulk_write(dev->regmap, 0x50, q_data, 4);
 252         if (ret)
 253                 goto err;
 254
 255         ret = regmap_bulk_write(dev->regmap, 0x60, i_data, 4);
 256         if (ret)
 257                 goto err;
 258
 259         /* gain control auto */
 260         ret = regmap_write(dev->regmap, 0x1a, 0x17);
 261         if (ret)
 262                 goto err;
 263
 264         return 0;
 265 err:
 266         dev_dbg(&client->dev, "failed=%d\n", ret);
 267         return ret;
 268 }
 269
 270 /*
 271  * V4L2 API
 272  */
 273 #if IS_ENABLED(CONFIG_VIDEO_V4L2)
 274 static const struct v4l2_frequency_band bands[] = {
 275         {
 276                 .type = V4L2_TUNER_RF,
 277                 .index = 0,
 278                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
 279                 .rangelow   =    59000000,
 280                 .rangehigh  =  1105000000,
 281         },
 282         {
 283                 .type = V4L2_TUNER_RF,
 284                 .index = 1,
 285                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
 286                 .rangelow   =  1249000000,
 287                 .rangehigh  =  2208000000UL,
 288         },
 289 };
 290
 291 static inline struct e4000_dev *e4000_subdev_to_dev(struct v4l2_subdev *sd)
 292 {
 293         return container_of(sd, struct e4000_dev, sd);
 294 }
 295
 296 static int e4000_s_power(struct v4l2_subdev *sd, int on)
 297 {
 298         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 299         struct i2c_client *client = dev->client;
 300         int ret;
 301
 302         dev_dbg(&client->dev, "on=%d\n", on);
 303
 304         if (on)
 305                 ret = e4000_init(dev);
 306         else
 307                 ret = e4000_sleep(dev);
 308         if (ret)
 309                 return ret;
 310
 311         return e4000_set_params(dev);
 312 }
 313
 314 static const struct v4l2_subdev_core_ops e4000_subdev_core_ops = {
 315         .s_power                  = e4000_s_power,
 316 };
 317
 318 static int e4000_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
 319 {
 320         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 321         struct i2c_client *client = dev->client;
 322
 323         dev_dbg(&client->dev, "index=%d\n", v->index);
 324
 325         strlcpy(v->name, "Elonics E4000", sizeof(v->name));
 326         v->type = V4L2_TUNER_RF;
 327         v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
 328         v->rangelow  = bands[0].rangelow;
 329         v->rangehigh = bands[1].rangehigh;
 330         return 0;
 331 }
 332
 333 static int e4000_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
 334 {
 335         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 336         struct i2c_client *client = dev->client;
 337
 338         dev_dbg(&client->dev, "index=%d\n", v->index);
 339         return 0;
 340 }
 341
 342 static int e4000_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
 343 {
 344         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 345         struct i2c_client *client = dev->client;
 346
 347         dev_dbg(&client->dev, "tuner=%d\n", f->tuner);
 348         f->frequency = dev->f_frequency;
 349         return 0;
 350 }
 351
 352 static int e4000_s_frequency(struct v4l2_subdev *sd,
 353                               const struct v4l2_frequency *f)
 354 {
 355         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 356         struct i2c_client *client = dev->client;
 357
 358         dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n",
 359                 f->tuner, f->type, f->frequency);
 360
 361         dev->f_frequency = clamp_t(unsigned int, f->frequency,
 362                                    bands[0].rangelow, bands[1].rangehigh);
 363         return e4000_set_params(dev);
 364 }
 365
 366 static int e4000_enum_freq_bands(struct v4l2_subdev *sd,
 367                                   struct v4l2_frequency_band *band)
 368 {
 369         struct e4000_dev *dev = e4000_subdev_to_dev(sd);
 370         struct i2c_client *client = dev->client;
 371
 372         dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n",
 373                 band->tuner, band->type, band->index);
 374
 375         if (band->index >= ARRAY_SIZE(bands))
 376                 return -EINVAL;
 377
 378         band->capability = bands[band->index].capability;
 379         band->rangelow = bands[band->index].rangelow;
 380         band->rangehigh = bands[band->index].rangehigh;
 381         return 0;
 382 }
 383
 384 static const struct v4l2_subdev_tuner_ops e4000_subdev_tuner_ops = {
 385         .g_tuner                  = e4000_g_tuner,
 386         .s_tuner                  = e4000_s_tuner,
 387         .g_frequency              = e4000_g_frequency,
 388         .s_frequency              = e4000_s_frequency,
 389         .enum_freq_bands          = e4000_enum_freq_bands,
 390 };
 391
 392 static const struct v4l2_subdev_ops e4000_subdev_ops = {
 393         .core                     = &e4000_subdev_core_ops,
 394         .tuner                    = &e4000_subdev_tuner_ops,
 395 };
 396
 397 static int e4000_set_lna_gain(struct dvb_frontend *fe)
 398 {
 399         struct e4000_dev *dev = fe->tuner_priv;
 400         struct i2c_client *client = dev->client;
 401         int ret;
 402         u8 u8tmp;
 403
 404         dev_dbg(&client->dev, "lna auto=%d->%d val=%d->%d\n",
 405                 dev->lna_gain_auto->cur.val, dev->lna_gain_auto->val,
 406                 dev->lna_gain->cur.val, dev->lna_gain->val);
 407
 408         if (dev->lna_gain_auto->val && dev->if_gain_auto->cur.val)
 409                 u8tmp = 0x17;
 410         else if (dev->lna_gain_auto->val)
 411                 u8tmp = 0x19;
 412         else if (dev->if_gain_auto->cur.val)
 413                 u8tmp = 0x16;
 414         else
 415                 u8tmp = 0x10;
 416
 417         ret = regmap_write(dev->regmap, 0x1a, u8tmp);
 418         if (ret)
 419                 goto err;
 420
 421         if (dev->lna_gain_auto->val == false) {
 422                 ret = regmap_write(dev->regmap, 0x14, dev->lna_gain->val);
 423                 if (ret)
 424                         goto err;
 425         }
 426
 427         return 0;
 428 err:
 429         dev_dbg(&client->dev, "failed=%d\n", ret);
 430         return ret;
 431 }
 432
 433 static int e4000_set_mixer_gain(struct dvb_frontend *fe)
 434 {
 435         struct e4000_dev *dev = fe->tuner_priv;
 436         struct i2c_client *client = dev->client;
 437         int ret;
 438         u8 u8tmp;
 439
 440         dev_dbg(&client->dev, "mixer auto=%d->%d val=%d->%d\n",
 441                 dev->mixer_gain_auto->cur.val, dev->mixer_gain_auto->val,
 442                 dev->mixer_gain->cur.val, dev->mixer_gain->val);
 443
 444         if (dev->mixer_gain_auto->val)
 445                 u8tmp = 0x15;
 446         else
 447                 u8tmp = 0x14;
 448
 449         ret = regmap_write(dev->regmap, 0x20, u8tmp);
 450         if (ret)
 451                 goto err;
 452
 453         if (dev->mixer_gain_auto->val == false) {
 454                 ret = regmap_write(dev->regmap, 0x15, dev->mixer_gain->val);
 455                 if (ret)
 456                         goto err;
 457         }
 458
 459         return 0;
 460 err:
 461         dev_dbg(&client->dev, "failed=%d\n", ret);
 462         return ret;
 463 }
 464
 465 static int e4000_set_if_gain(struct dvb_frontend *fe)
 466 {
 467         struct e4000_dev *dev = fe->tuner_priv;
 468         struct i2c_client *client = dev->client;
 469         int ret;
 470         u8 buf[2];
 471         u8 u8tmp;
 472
 473         dev_dbg(&client->dev, "if auto=%d->%d val=%d->%d\n",
 474                 dev->if_gain_auto->cur.val, dev->if_gain_auto->val,
 475                 dev->if_gain->cur.val, dev->if_gain->val);
 476
 477         if (dev->if_gain_auto->val && dev->lna_gain_auto->cur.val)
 478                 u8tmp = 0x17;
 479         else if (dev->lna_gain_auto->cur.val)
 480                 u8tmp = 0x19;
 481         else if (dev->if_gain_auto->val)
 482                 u8tmp = 0x16;
 483         else
 484                 u8tmp = 0x10;
 485
 486         ret = regmap_write(dev->regmap, 0x1a, u8tmp);
 487         if (ret)
 488                 goto err;
 489
 490         if (dev->if_gain_auto->val == false) {
 491                 buf[0] = e4000_if_gain_lut[dev->if_gain->val].reg16_val;
 492                 buf[1] = e4000_if_gain_lut[dev->if_gain->val].reg17_val;
 493                 ret = regmap_bulk_write(dev->regmap, 0x16, buf, 2);
 494                 if (ret)
 495                         goto err;
 496         }
 497
 498         return 0;
 499 err:
 500         dev_dbg(&client->dev, "failed=%d\n", ret);
 501         return ret;
 502 }
 503
 504 static int e4000_pll_lock(struct dvb_frontend *fe)
 505 {
 506         struct e4000_dev *dev = fe->tuner_priv;
 507         struct i2c_client *client = dev->client;
 508         int ret;
 509         unsigned int uitmp;
 510
 511         ret = regmap_read(dev->regmap, 0x07, &uitmp);
 512         if (ret)
 513                 goto err;
 514
 515         dev->pll_lock->val = (uitmp & 0x01);
 516
 517         return 0;
 518 err:
 519         dev_dbg(&client->dev, "failed=%d\n", ret);
 520         return ret;
 521 }
 522
 523 static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 524 {
 525         struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);
 526         struct i2c_client *client = dev->client;
 527         int ret;
 528
 529         if (!dev->active)
 530                 return 0;
 531
 532         switch (ctrl->id) {
 533         case  V4L2_CID_RF_TUNER_PLL_LOCK:
 534                 ret = e4000_pll_lock(dev->fe);
 535                 break;
 536         default:
 537                 dev_dbg(&client->dev, "unknown ctrl: id=%d name=%s\n",
 538                         ctrl->id, ctrl->name);
 539                 ret = -EINVAL;
 540         }
 541
 542         return ret;
 543 }
 544
 545 static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
 546 {
 547         struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);
 548         struct i2c_client *client = dev->client;
 549         int ret;
 550
 551         if (!dev->active)
 552                 return 0;
 553
 554         switch (ctrl->id) {
 555         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
 556         case V4L2_CID_RF_TUNER_BANDWIDTH:
 557                 /*
 558                  * TODO: Auto logic does not work 100% correctly as tuner driver
 559                  * do not have information to calculate maximum suitable
 560                  * bandwidth. Calculating it is responsible of master driver.
 561                  */
 562                 dev->f_bandwidth = dev->bandwidth->val;
 563                 ret = e4000_set_params(dev);
 564                 break;
 565         case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
 566         case  V4L2_CID_RF_TUNER_LNA_GAIN:
 567                 ret = e4000_set_lna_gain(dev->fe);
 568                 break;
 569         case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
 570         case  V4L2_CID_RF_TUNER_MIXER_GAIN:
 571                 ret = e4000_set_mixer_gain(dev->fe);
 572                 break;
 573         case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
 574         case  V4L2_CID_RF_TUNER_IF_GAIN:
 575                 ret = e4000_set_if_gain(dev->fe);
 576                 break;
 577         default:
 578                 dev_dbg(&client->dev, "unknown ctrl: id=%d name=%s\n",
 579                         ctrl->id, ctrl->name);
 580                 ret = -EINVAL;
 581         }
 582
 583         return ret;
 584 }
 585
 586 static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
 587         .g_volatile_ctrl = e4000_g_volatile_ctrl,
 588         .s_ctrl = e4000_s_ctrl,
 589 };
 590 #endif
 591
 592 /*
 593  * DVB API
 594  */
 595 static int e4000_dvb_set_params(struct dvb_frontend *fe)
 596 {
 597         struct e4000_dev *dev = fe->tuner_priv;
 598         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 599
 600         dev->f_frequency = c->frequency;
 601         dev->f_bandwidth = c->bandwidth_hz;
 602         return e4000_set_params(dev);
 603 }
 604
 605 static int e4000_dvb_init(struct dvb_frontend *fe)
 606 {
 607         return e4000_init(fe->tuner_priv);
 608 }
 609
 610 static int e4000_dvb_sleep(struct dvb_frontend *fe)
 611 {
 612         return e4000_sleep(fe->tuner_priv);
 613 }
 614
 615 static int e4000_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 616 {
 617         *frequency = 0; /* Zero-IF */
 618         return 0;
 619 }
 620
 621 static const struct dvb_tuner_ops e4000_dvb_tuner_ops = {
 622         .info = {
 623                 .name           = "Elonics E4000",
 624                 .frequency_min  = 174000000,
 625                 .frequency_max  = 862000000,
 626         },
 627
 628         .init = e4000_dvb_init,
 629         .sleep = e4000_dvb_sleep,
 630         .set_params = e4000_dvb_set_params,
 631
 632         .get_if_frequency = e4000_dvb_get_if_frequency,
 633 };
 634
 635 static int e4000_probe(struct i2c_client *client,
 636                        const struct i2c_device_id *id)
 637 {
 638         struct e4000_dev *dev;
 639         struct e4000_config *cfg = client->dev.platform_data;
 640         struct dvb_frontend *fe = cfg->fe;
 641         int ret;
 642         unsigned int uitmp;
 643         static const struct regmap_config regmap_config = {
 644                 .reg_bits = 8,
 645                 .val_bits = 8,
 646         };
 647
 648         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 649         if (!dev) {
 650                 ret = -ENOMEM;
 651                 goto err;
 652         }
 653
 654         dev->clk = cfg->clock;
 655         dev->client = client;
 656         dev->fe = cfg->fe;
 657         dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
 658         if (IS_ERR(dev->regmap)) {
 659                 ret = PTR_ERR(dev->regmap);
 660                 goto err_kfree;
 661         }
 662
 663         /* check if the tuner is there */
 664         ret = regmap_read(dev->regmap, 0x02, &uitmp);
 665         if (ret)
 666                 goto err_kfree;
 667
 668         dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
 669
 670         if (uitmp != 0x40) {
 671                 ret = -ENODEV;
 672                 goto err_kfree;
 673         }
 674
 675         /* put sleep as chip seems to be in normal mode by default */
 676         ret = regmap_write(dev->regmap, 0x00, 0x00);
 677         if (ret)
 678                 goto err_kfree;
 679
 680 #if IS_ENABLED(CONFIG_VIDEO_V4L2)
 681         /* Register controls */
 682         v4l2_ctrl_handler_init(&dev->hdl, 9);
 683         dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 684                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
 685         dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 686                         V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
 687         v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
 688         dev->lna_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 689                         V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
 690         dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 691                         V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
 692         v4l2_ctrl_auto_cluster(2, &dev->lna_gain_auto, 0, false);
 693         dev->mixer_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 694                         V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
 695         dev->mixer_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 696                         V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
 697         v4l2_ctrl_auto_cluster(2, &dev->mixer_gain_auto, 0, false);
 698         dev->if_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 699                         V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
 700         dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 701                         V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
 702         v4l2_ctrl_auto_cluster(2, &dev->if_gain_auto, 0, false);
 703         dev->pll_lock = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
 704                         V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
 705         if (dev->hdl.error) {
 706                 ret = dev->hdl.error;
 707                 dev_err(&client->dev, "Could not initialize controls\n");
 708                 v4l2_ctrl_handler_free(&dev->hdl);
 709                 goto err_kfree;
 710         }
 711
 712         dev->sd.ctrl_handler = &dev->hdl;
 713         dev->f_frequency = bands[0].rangelow;
 714         dev->f_bandwidth = dev->bandwidth->val;
 715         v4l2_i2c_subdev_init(&dev->sd, client, &e4000_subdev_ops);
 716 #endif
 717         fe->tuner_priv = dev;
 718         memcpy(&fe->ops.tuner_ops, &e4000_dvb_tuner_ops,
 719                sizeof(fe->ops.tuner_ops));
 720         v4l2_set_subdevdata(&dev->sd, client);
 721         i2c_set_clientdata(client, &dev->sd);
 722
 723         dev_info(&client->dev, "Elonics E4000 successfully identified\n");
 724         return 0;
 725 err_kfree:
 726         kfree(dev);
 727 err:
 728         dev_dbg(&client->dev, "failed=%d\n", ret);
 729         return ret;
 730 }
 731
 732 static int e4000_remove(struct i2c_client *client)
 733 {
 734         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 735         struct e4000_dev *dev = container_of(sd, struct e4000_dev, sd);
 736
 737         dev_dbg(&client->dev, "\n");
 738
 739 #if IS_ENABLED(CONFIG_VIDEO_V4L2)
 740         v4l2_ctrl_handler_free(&dev->hdl);
 741 #endif
 742         kfree(dev);
 743
 744         return 0;
 745 }
 746
 747 static const struct i2c_device_id e4000_id_table[] = {
 748         {"e4000", 0},
 749         {}
 750 };
 751 MODULE_DEVICE_TABLE(i2c, e4000_id_table);
 752
 753 static struct i2c_driver e4000_driver = {
 754         .driver = {
 755                 .name   = "e4000",
 756                 .suppress_bind_attrs = true,
 757         },
 758         .probe          = e4000_probe,
 759         .remove         = e4000_remove,
 760         .id_table       = e4000_id_table,
 761 };
 762
 763 module_i2c_driver(e4000_driver);
 764
 765 MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
 766 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 767 MODULE_LICENSE("GPL");