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 #include <linux/math64.h>
  23
  24 /* Max transfer size done by I2C transfer functions */
  25 #define MAX_XFER_SIZE  64
  26
  27 /* write multiple registers */
  28 static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
  29 {
  30         int ret;
  31         u8 buf[MAX_XFER_SIZE];
  32         struct i2c_msg msg[1] = {
  33                 {
  34                         .addr = priv->client->addr,
  35                         .flags = 0,
  36                         .len = 1 + len,
  37                         .buf = buf,
  38                 }
  39         };
  40
  41         if (1 + len > sizeof(buf)) {
  42                 dev_warn(&priv->client->dev,
  43                          "%s: i2c wr reg=%04x: len=%d is too big!\n",
  44                          KBUILD_MODNAME, reg, len);
  45                 return -EINVAL;
  46         }
  47
  48         buf[0] = reg;
  49         memcpy(&buf[1], val, len);
  50
  51         ret = i2c_transfer(priv->client->adapter, msg, 1);
  52         if (ret == 1) {
  53                 ret = 0;
  54         } else {
  55                 dev_warn(&priv->client->dev,
  56                                 "%s: i2c wr failed=%d reg=%02x len=%d\n",
  57                                 KBUILD_MODNAME, ret, reg, len);
  58                 ret = -EREMOTEIO;
  59         }
  60         return ret;
  61 }
  62
  63 /* read multiple registers */
  64 static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
  65 {
  66         int ret;
  67         u8 buf[MAX_XFER_SIZE];
  68         struct i2c_msg msg[2] = {
  69                 {
  70                         .addr = priv->client->addr,
  71                         .flags = 0,
  72                         .len = 1,
  73                         .buf = &reg,
  74                 }, {
  75                         .addr = priv->client->addr,
  76                         .flags = I2C_M_RD,
  77                         .len = len,
  78                         .buf = buf,
  79                 }
  80         };
  81
  82         if (len > sizeof(buf)) {
  83                 dev_warn(&priv->client->dev,
  84                          "%s: i2c rd reg=%04x: len=%d is too big!\n",
  85                          KBUILD_MODNAME, reg, len);
  86                 return -EINVAL;
  87         }
  88
  89         ret = i2c_transfer(priv->client->adapter, msg, 2);
  90         if (ret == 2) {
  91                 memcpy(val, buf, len);
  92                 ret = 0;
  93         } else {
  94                 dev_warn(&priv->client->dev,
  95                                 "%s: i2c rd failed=%d reg=%02x len=%d\n",
  96                                 KBUILD_MODNAME, ret, reg, len);
  97                 ret = -EREMOTEIO;
  98         }
  99
 100         return ret;
 101 }
 102
 103 /* write single register */
 104 static int e4000_wr_reg(struct e4000_priv *priv, u8 reg, u8 val)
 105 {
 106         return e4000_wr_regs(priv, reg, &val, 1);
 107 }
 108
 109 /* read single register */
 110 static int e4000_rd_reg(struct e4000_priv *priv, u8 reg, u8 *val)
 111 {
 112         return e4000_rd_regs(priv, reg, val, 1);
 113 }
 114
 115 static int e4000_init(struct dvb_frontend *fe)
 116 {
 117         struct e4000_priv *priv = fe->tuner_priv;
 118         int ret;
 119
 120         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 121
 122         /* dummy I2C to ensure I2C wakes up */
 123         ret = e4000_wr_reg(priv, 0x02, 0x40);
 124
 125         /* reset */
 126         ret = e4000_wr_reg(priv, 0x00, 0x01);
 127         if (ret < 0)
 128                 goto err;
 129
 130         /* disable output clock */
 131         ret = e4000_wr_reg(priv, 0x06, 0x00);
 132         if (ret < 0)
 133                 goto err;
 134
 135         ret = e4000_wr_reg(priv, 0x7a, 0x96);
 136         if (ret < 0)
 137                 goto err;
 138
 139         /* configure gains */
 140         ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2);
 141         if (ret < 0)
 142                 goto err;
 143
 144         ret = e4000_wr_reg(priv, 0x82, 0x00);
 145         if (ret < 0)
 146                 goto err;
 147
 148         ret = e4000_wr_reg(priv, 0x24, 0x05);
 149         if (ret < 0)
 150                 goto err;
 151
 152         ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2);
 153         if (ret < 0)
 154                 goto err;
 155
 156         ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2);
 157         if (ret < 0)
 158                 goto err;
 159
 160         /* DC offset control */
 161         ret = e4000_wr_reg(priv, 0x2d, 0x1f);
 162         if (ret < 0)
 163                 goto err;
 164
 165         ret = e4000_wr_regs(priv, 0x70, "\x01\x01", 2);
 166         if (ret < 0)
 167                 goto err;
 168
 169         /* gain control */
 170         ret = e4000_wr_reg(priv, 0x1a, 0x17);
 171         if (ret < 0)
 172                 goto err;
 173
 174         ret = e4000_wr_reg(priv, 0x1f, 0x1a);
 175         if (ret < 0)
 176                 goto err;
 177
 178         priv->active = true;
 179 err:
 180         if (ret)
 181                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 182
 183         return ret;
 184 }
 185
 186 static int e4000_sleep(struct dvb_frontend *fe)
 187 {
 188         struct e4000_priv *priv = fe->tuner_priv;
 189         int ret;
 190
 191         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 192
 193         priv->active = false;
 194
 195         ret = e4000_wr_reg(priv, 0x00, 0x00);
 196         if (ret < 0)
 197                 goto err;
 198 err:
 199         if (ret)
 200                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 201
 202         return ret;
 203 }
 204
 205 static int e4000_set_params(struct dvb_frontend *fe)
 206 {
 207         struct e4000_priv *priv = fe->tuner_priv;
 208         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 209         int ret, i, sigma_delta;
 210         u64 f_vco;
 211         u8 buf[5], i_data[4], q_data[4];
 212
 213         dev_dbg(&priv->client->dev,
 214                         "%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
 215                         __func__, c->delivery_system, c->frequency,
 216                         c->bandwidth_hz);
 217
 218         /* gain control manual */
 219         ret = e4000_wr_reg(priv, 0x1a, 0x00);
 220         if (ret < 0)
 221                 goto err;
 222
 223         /* PLL */
 224         for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
 225                 if (c->frequency <= e4000_pll_lut[i].freq)
 226                         break;
 227         }
 228
 229         if (i == ARRAY_SIZE(e4000_pll_lut)) {
 230                 ret = -EINVAL;
 231                 goto err;
 232         }
 233
 234         f_vco = 1ull * c->frequency * e4000_pll_lut[i].mul;
 235         sigma_delta = div_u64(0x10000ULL * (f_vco % priv->clock), priv->clock);
 236         buf[0] = div_u64(f_vco, priv->clock);
 237         buf[1] = (sigma_delta >> 0) & 0xff;
 238         buf[2] = (sigma_delta >> 8) & 0xff;
 239         buf[3] = 0x00;
 240         buf[4] = e4000_pll_lut[i].div;
 241
 242         dev_dbg(&priv->client->dev,
 243                         "%s: f_vco=%llu pll div=%d sigma_delta=%04x\n",
 244                         __func__, f_vco, buf[0], sigma_delta);
 245
 246         ret = e4000_wr_regs(priv, 0x09, buf, 5);
 247         if (ret < 0)
 248                 goto err;
 249
 250         /* LNA filter (RF filter) */
 251         for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
 252                 if (c->frequency <= e400_lna_filter_lut[i].freq)
 253                         break;
 254         }
 255
 256         if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
 257                 ret = -EINVAL;
 258                 goto err;
 259         }
 260
 261         ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val);
 262         if (ret < 0)
 263                 goto err;
 264
 265         /* IF filters */
 266         for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
 267                 if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
 268                         break;
 269         }
 270
 271         if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
 272                 ret = -EINVAL;
 273                 goto err;
 274         }
 275
 276         buf[0] = e4000_if_filter_lut[i].reg11_val;
 277         buf[1] = e4000_if_filter_lut[i].reg12_val;
 278
 279         ret = e4000_wr_regs(priv, 0x11, buf, 2);
 280         if (ret < 0)
 281                 goto err;
 282
 283         /* frequency band */
 284         for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
 285                 if (c->frequency <= e4000_band_lut[i].freq)
 286                         break;
 287         }
 288
 289         if (i == ARRAY_SIZE(e4000_band_lut)) {
 290                 ret = -EINVAL;
 291                 goto err;
 292         }
 293
 294         ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val);
 295         if (ret < 0)
 296                 goto err;
 297
 298         ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val);
 299         if (ret < 0)
 300                 goto err;
 301
 302         /* DC offset */
 303         for (i = 0; i < 4; i++) {
 304                 if (i == 0)
 305                         ret = e4000_wr_regs(priv, 0x15, "\x00\x7e\x24", 3);
 306                 else if (i == 1)
 307                         ret = e4000_wr_regs(priv, 0x15, "\x00\x7f", 2);
 308                 else if (i == 2)
 309                         ret = e4000_wr_regs(priv, 0x15, "\x01", 1);
 310                 else
 311                         ret = e4000_wr_regs(priv, 0x16, "\x7e", 1);
 312
 313                 if (ret < 0)
 314                         goto err;
 315
 316                 ret = e4000_wr_reg(priv, 0x29, 0x01);
 317                 if (ret < 0)
 318                         goto err;
 319
 320                 ret = e4000_rd_regs(priv, 0x2a, buf, 3);
 321                 if (ret < 0)
 322                         goto err;
 323
 324                 i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
 325                 q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
 326         }
 327
 328         swap(q_data[2], q_data[3]);
 329         swap(i_data[2], i_data[3]);
 330
 331         ret = e4000_wr_regs(priv, 0x50, q_data, 4);
 332         if (ret < 0)
 333                 goto err;
 334
 335         ret = e4000_wr_regs(priv, 0x60, i_data, 4);
 336         if (ret < 0)
 337                 goto err;
 338
 339         /* gain control auto */
 340         ret = e4000_wr_reg(priv, 0x1a, 0x17);
 341         if (ret < 0)
 342                 goto err;
 343 err:
 344         if (ret)
 345                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 346
 347         return ret;
 348 }
 349
 350 static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 351 {
 352         struct e4000_priv *priv = fe->tuner_priv;
 353
 354         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 355
 356         *frequency = 0; /* Zero-IF */
 357
 358         return 0;
 359 }
 360
 361 static int e4000_set_lna_gain(struct dvb_frontend *fe)
 362 {
 363         struct e4000_priv *priv = fe->tuner_priv;
 364         int ret;
 365         u8 u8tmp;
 366
 367         dev_dbg(&priv->client->dev, "%s: lna auto=%d->%d val=%d->%d\n",
 368                         __func__, priv->lna_gain_auto->cur.val,
 369                         priv->lna_gain_auto->val, priv->lna_gain->cur.val,
 370                         priv->lna_gain->val);
 371
 372         if (priv->lna_gain_auto->val && priv->if_gain_auto->cur.val)
 373                 u8tmp = 0x17;
 374         else if (priv->lna_gain_auto->val)
 375                 u8tmp = 0x19;
 376         else if (priv->if_gain_auto->cur.val)
 377                 u8tmp = 0x16;
 378         else
 379                 u8tmp = 0x10;
 380
 381         ret = e4000_wr_reg(priv, 0x1a, u8tmp);
 382         if (ret)
 383                 goto err;
 384
 385         if (priv->lna_gain_auto->val == false) {
 386                 ret = e4000_wr_reg(priv, 0x14, priv->lna_gain->val);
 387                 if (ret)
 388                         goto err;
 389         }
 390 err:
 391         if (ret)
 392                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 393
 394         return ret;
 395 }
 396
 397 static int e4000_set_mixer_gain(struct dvb_frontend *fe)
 398 {
 399         struct e4000_priv *priv = fe->tuner_priv;
 400         int ret;
 401         u8 u8tmp;
 402
 403         dev_dbg(&priv->client->dev, "%s: mixer auto=%d->%d val=%d->%d\n",
 404                         __func__, priv->mixer_gain_auto->cur.val,
 405                         priv->mixer_gain_auto->val, priv->mixer_gain->cur.val,
 406                         priv->mixer_gain->val);
 407
 408         if (priv->mixer_gain_auto->val)
 409                 u8tmp = 0x15;
 410         else
 411                 u8tmp = 0x14;
 412
 413         ret = e4000_wr_reg(priv, 0x20, u8tmp);
 414         if (ret)
 415                 goto err;
 416
 417         if (priv->mixer_gain_auto->val == false) {
 418                 ret = e4000_wr_reg(priv, 0x15, priv->mixer_gain->val);
 419                 if (ret)
 420                         goto err;
 421         }
 422 err:
 423         if (ret)
 424                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 425
 426         return ret;
 427 }
 428
 429 static int e4000_set_if_gain(struct dvb_frontend *fe)
 430 {
 431         struct e4000_priv *priv = fe->tuner_priv;
 432         int ret;
 433         u8 buf[2];
 434         u8 u8tmp;
 435
 436         dev_dbg(&priv->client->dev, "%s: if auto=%d->%d val=%d->%d\n",
 437                         __func__, priv->if_gain_auto->cur.val,
 438                         priv->if_gain_auto->val, priv->if_gain->cur.val,
 439                         priv->if_gain->val);
 440
 441         if (priv->if_gain_auto->val && priv->lna_gain_auto->cur.val)
 442                 u8tmp = 0x17;
 443         else if (priv->lna_gain_auto->cur.val)
 444                 u8tmp = 0x19;
 445         else if (priv->if_gain_auto->val)
 446                 u8tmp = 0x16;
 447         else
 448                 u8tmp = 0x10;
 449
 450         ret = e4000_wr_reg(priv, 0x1a, u8tmp);
 451         if (ret)
 452                 goto err;
 453
 454         if (priv->if_gain_auto->val == false) {
 455                 buf[0] = e4000_if_gain_lut[priv->if_gain->val].reg16_val;
 456                 buf[1] = e4000_if_gain_lut[priv->if_gain->val].reg17_val;
 457                 ret = e4000_wr_regs(priv, 0x16, buf, 2);
 458                 if (ret)
 459                         goto err;
 460         }
 461 err:
 462         if (ret)
 463                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 464
 465         return ret;
 466 }
 467
 468 static int e4000_pll_lock(struct dvb_frontend *fe)
 469 {
 470         struct e4000_priv *priv = fe->tuner_priv;
 471         int ret;
 472         u8 u8tmp;
 473
 474         if (priv->active == false)
 475                 return 0;
 476
 477         ret = e4000_rd_reg(priv, 0x07, &u8tmp);
 478         if (ret)
 479                 goto err;
 480
 481         priv->pll_lock->val = (u8tmp & 0x01);
 482 err:
 483         if (ret)
 484                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 485
 486         return ret;
 487 }
 488
 489 static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 490 {
 491         struct e4000_priv *priv =
 492                         container_of(ctrl->handler, struct e4000_priv, hdl);
 493         int ret;
 494
 495         switch (ctrl->id) {
 496         case  V4L2_CID_RF_TUNER_PLL_LOCK:
 497                 ret = e4000_pll_lock(priv->fe);
 498                 break;
 499         default:
 500                 ret = -EINVAL;
 501         }
 502
 503         return ret;
 504 }
 505
 506 static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
 507 {
 508         struct e4000_priv *priv =
 509                         container_of(ctrl->handler, struct e4000_priv, hdl);
 510         struct dvb_frontend *fe = priv->fe;
 511         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 512         int ret;
 513
 514         dev_dbg(&priv->client->dev,
 515                         "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
 516                         __func__, ctrl->id, ctrl->name, ctrl->val,
 517                         ctrl->minimum, ctrl->maximum, ctrl->step);
 518
 519         switch (ctrl->id) {
 520         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
 521         case V4L2_CID_RF_TUNER_BANDWIDTH:
 522                 c->bandwidth_hz = priv->bandwidth->val;
 523                 ret = e4000_set_params(priv->fe);
 524                 break;
 525         case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
 526         case  V4L2_CID_RF_TUNER_LNA_GAIN:
 527                 ret = e4000_set_lna_gain(priv->fe);
 528                 break;
 529         case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
 530         case  V4L2_CID_RF_TUNER_MIXER_GAIN:
 531                 ret = e4000_set_mixer_gain(priv->fe);
 532                 break;
 533         case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
 534         case  V4L2_CID_RF_TUNER_IF_GAIN:
 535                 ret = e4000_set_if_gain(priv->fe);
 536                 break;
 537         default:
 538                 ret = -EINVAL;
 539         }
 540
 541         return ret;
 542 }
 543
 544 static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
 545         .g_volatile_ctrl = e4000_g_volatile_ctrl,
 546         .s_ctrl = e4000_s_ctrl,
 547 };
 548
 549 static const struct dvb_tuner_ops e4000_tuner_ops = {
 550         .info = {
 551                 .name           = "Elonics E4000",
 552                 .frequency_min  = 174000000,
 553                 .frequency_max  = 862000000,
 554         },
 555
 556         .init = e4000_init,
 557         .sleep = e4000_sleep,
 558         .set_params = e4000_set_params,
 559
 560         .get_if_frequency = e4000_get_if_frequency,
 561 };
 562
 563 /*
 564  * Use V4L2 subdev to carry V4L2 control handler, even we don't implement
 565  * subdev itself, just to avoid reinventing the wheel.
 566  */
 567 static int e4000_probe(struct i2c_client *client,
 568                 const struct i2c_device_id *id)
 569 {
 570         struct e4000_config *cfg = client->dev.platform_data;
 571         struct dvb_frontend *fe = cfg->fe;
 572         struct e4000_priv *priv;
 573         int ret;
 574         u8 chip_id;
 575
 576         priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);
 577         if (!priv) {
 578                 ret = -ENOMEM;
 579                 dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
 580                 goto err;
 581         }
 582
 583         priv->clock = cfg->clock;
 584         priv->client = client;
 585         priv->fe = cfg->fe;
 586
 587         /* check if the tuner is there */
 588         ret = e4000_rd_reg(priv, 0x02, &chip_id);
 589         if (ret < 0)
 590                 goto err;
 591
 592         dev_dbg(&priv->client->dev,
 593                         "%s: chip_id=%02x\n", __func__, chip_id);
 594
 595         if (chip_id != 0x40) {
 596                 ret = -ENODEV;
 597                 goto err;
 598         }
 599
 600         /* put sleep as chip seems to be in normal mode by default */
 601         ret = e4000_wr_reg(priv, 0x00, 0x00);
 602         if (ret < 0)
 603                 goto err;
 604
 605         /* Register controls */
 606         v4l2_ctrl_handler_init(&priv->hdl, 9);
 607         priv->bandwidth_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 608                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
 609         priv->bandwidth = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 610                         V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
 611         v4l2_ctrl_auto_cluster(2, &priv->bandwidth_auto, 0, false);
 612         priv->lna_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 613                         V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
 614         priv->lna_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 615                         V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
 616         v4l2_ctrl_auto_cluster(2, &priv->lna_gain_auto, 0, false);
 617         priv->mixer_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 618                         V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
 619         priv->mixer_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 620                         V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
 621         v4l2_ctrl_auto_cluster(2, &priv->mixer_gain_auto, 0, false);
 622         priv->if_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 623                         V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
 624         priv->if_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 625                         V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
 626         v4l2_ctrl_auto_cluster(2, &priv->if_gain_auto, 0, false);
 627         priv->pll_lock = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 628                         V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
 629         if (priv->hdl.error) {
 630                 ret = priv->hdl.error;
 631                 dev_err(&priv->client->dev, "Could not initialize controls\n");
 632                 v4l2_ctrl_handler_free(&priv->hdl);
 633                 goto err;
 634         }
 635
 636         priv->sd.ctrl_handler = &priv->hdl;
 637
 638         dev_info(&priv->client->dev,
 639                         "%s: Elonics E4000 successfully identified\n",
 640                         KBUILD_MODNAME);
 641
 642         fe->tuner_priv = priv;
 643         memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
 644                         sizeof(struct dvb_tuner_ops));
 645
 646         v4l2_set_subdevdata(&priv->sd, client);
 647         i2c_set_clientdata(client, &priv->sd);
 648
 649         return 0;
 650 err:
 651         if (ret) {
 652                 dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
 653                 kfree(priv);
 654         }
 655
 656         return ret;
 657 }
 658
 659 static int e4000_remove(struct i2c_client *client)
 660 {
 661         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 662         struct e4000_priv *priv = container_of(sd, struct e4000_priv, sd);
 663         struct dvb_frontend *fe = priv->fe;
 664
 665         dev_dbg(&client->dev, "%s:\n", __func__);
 666
 667         v4l2_ctrl_handler_free(&priv->hdl);
 668         memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 669         fe->tuner_priv = NULL;
 670         kfree(priv);
 671
 672         return 0;
 673 }
 674
 675 static const struct i2c_device_id e4000_id[] = {
 676         {"e4000", 0},
 677         {}
 678 };
 679 MODULE_DEVICE_TABLE(i2c, e4000_id);
 680
 681 static struct i2c_driver e4000_driver = {
 682         .driver = {
 683                 .owner  = THIS_MODULE,
 684                 .name   = "e4000",
 685         },
 686         .probe          = e4000_probe,
 687         .remove         = e4000_remove,
 688         .id_table       = e4000_id,
 689 };
 690
 691 module_i2c_driver(e4000_driver);
 692
 693 MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
 694 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 695 MODULE_LICENSE("GPL");