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         if (fe->ops.i2c_gate_ctrl)
 123                 fe->ops.i2c_gate_ctrl(fe, 1);
 124
 125         /* dummy I2C to ensure I2C wakes up */
 126         ret = e4000_wr_reg(priv, 0x02, 0x40);
 127
 128         /* reset */
 129         ret = e4000_wr_reg(priv, 0x00, 0x01);
 130         if (ret < 0)
 131                 goto err;
 132
 133         /* disable output clock */
 134         ret = e4000_wr_reg(priv, 0x06, 0x00);
 135         if (ret < 0)
 136                 goto err;
 137
 138         ret = e4000_wr_reg(priv, 0x7a, 0x96);
 139         if (ret < 0)
 140                 goto err;
 141
 142         /* configure gains */
 143         ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2);
 144         if (ret < 0)
 145                 goto err;
 146
 147         ret = e4000_wr_reg(priv, 0x82, 0x00);
 148         if (ret < 0)
 149                 goto err;
 150
 151         ret = e4000_wr_reg(priv, 0x24, 0x05);
 152         if (ret < 0)
 153                 goto err;
 154
 155         ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2);
 156         if (ret < 0)
 157                 goto err;
 158
 159         ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2);
 160         if (ret < 0)
 161                 goto err;
 162
 163         /* DC offset control */
 164         ret = e4000_wr_reg(priv, 0x2d, 0x1f);
 165         if (ret < 0)
 166                 goto err;
 167
 168         ret = e4000_wr_regs(priv, 0x70, "\x01\x01", 2);
 169         if (ret < 0)
 170                 goto err;
 171
 172         /* gain control */
 173         ret = e4000_wr_reg(priv, 0x1a, 0x17);
 174         if (ret < 0)
 175                 goto err;
 176
 177         ret = e4000_wr_reg(priv, 0x1f, 0x1a);
 178         if (ret < 0)
 179                 goto err;
 180
 181         if (fe->ops.i2c_gate_ctrl)
 182                 fe->ops.i2c_gate_ctrl(fe, 0);
 183
 184         priv->active = true;
 185
 186         return 0;
 187 err:
 188         if (fe->ops.i2c_gate_ctrl)
 189                 fe->ops.i2c_gate_ctrl(fe, 0);
 190
 191         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 192         return ret;
 193 }
 194
 195 static int e4000_sleep(struct dvb_frontend *fe)
 196 {
 197         struct e4000_priv *priv = fe->tuner_priv;
 198         int ret;
 199
 200         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 201
 202         priv->active = false;
 203
 204         if (fe->ops.i2c_gate_ctrl)
 205                 fe->ops.i2c_gate_ctrl(fe, 1);
 206
 207         ret = e4000_wr_reg(priv, 0x00, 0x00);
 208         if (ret < 0)
 209                 goto err;
 210
 211         if (fe->ops.i2c_gate_ctrl)
 212                 fe->ops.i2c_gate_ctrl(fe, 0);
 213
 214         return 0;
 215 err:
 216         if (fe->ops.i2c_gate_ctrl)
 217                 fe->ops.i2c_gate_ctrl(fe, 0);
 218
 219         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 220         return ret;
 221 }
 222
 223 static int e4000_set_params(struct dvb_frontend *fe)
 224 {
 225         struct e4000_priv *priv = fe->tuner_priv;
 226         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 227         int ret, i, sigma_delta;
 228         u64 f_vco;
 229         u8 buf[5], i_data[4], q_data[4];
 230
 231         dev_dbg(&priv->client->dev,
 232                         "%s: delivery_system=%d frequency=%u bandwidth_hz=%u\n",
 233                         __func__, c->delivery_system, c->frequency,
 234                         c->bandwidth_hz);
 235
 236         if (fe->ops.i2c_gate_ctrl)
 237                 fe->ops.i2c_gate_ctrl(fe, 1);
 238
 239         /* gain control manual */
 240         ret = e4000_wr_reg(priv, 0x1a, 0x00);
 241         if (ret < 0)
 242                 goto err;
 243
 244         /* PLL */
 245         for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
 246                 if (c->frequency <= e4000_pll_lut[i].freq)
 247                         break;
 248         }
 249
 250         if (i == ARRAY_SIZE(e4000_pll_lut)) {
 251                 ret = -EINVAL;
 252                 goto err;
 253         }
 254
 255         f_vco = 1ull * c->frequency * e4000_pll_lut[i].mul;
 256         sigma_delta = div_u64(0x10000ULL * (f_vco % priv->clock), priv->clock);
 257         buf[0] = div_u64(f_vco, priv->clock);
 258         buf[1] = (sigma_delta >> 0) & 0xff;
 259         buf[2] = (sigma_delta >> 8) & 0xff;
 260         buf[3] = 0x00;
 261         buf[4] = e4000_pll_lut[i].div;
 262
 263         dev_dbg(&priv->client->dev,
 264                         "%s: f_vco=%llu pll div=%d sigma_delta=%04x\n",
 265                         __func__, f_vco, buf[0], sigma_delta);
 266
 267         ret = e4000_wr_regs(priv, 0x09, buf, 5);
 268         if (ret < 0)
 269                 goto err;
 270
 271         /* LNA filter (RF filter) */
 272         for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
 273                 if (c->frequency <= e400_lna_filter_lut[i].freq)
 274                         break;
 275         }
 276
 277         if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
 278                 ret = -EINVAL;
 279                 goto err;
 280         }
 281
 282         ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val);
 283         if (ret < 0)
 284                 goto err;
 285
 286         /* IF filters */
 287         for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
 288                 if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
 289                         break;
 290         }
 291
 292         if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
 293                 ret = -EINVAL;
 294                 goto err;
 295         }
 296
 297         buf[0] = e4000_if_filter_lut[i].reg11_val;
 298         buf[1] = e4000_if_filter_lut[i].reg12_val;
 299
 300         ret = e4000_wr_regs(priv, 0x11, buf, 2);
 301         if (ret < 0)
 302                 goto err;
 303
 304         /* frequency band */
 305         for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
 306                 if (c->frequency <= e4000_band_lut[i].freq)
 307                         break;
 308         }
 309
 310         if (i == ARRAY_SIZE(e4000_band_lut)) {
 311                 ret = -EINVAL;
 312                 goto err;
 313         }
 314
 315         ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val);
 316         if (ret < 0)
 317                 goto err;
 318
 319         ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val);
 320         if (ret < 0)
 321                 goto err;
 322
 323         /* DC offset */
 324         for (i = 0; i < 4; i++) {
 325                 if (i == 0)
 326                         ret = e4000_wr_regs(priv, 0x15, "\x00\x7e\x24", 3);
 327                 else if (i == 1)
 328                         ret = e4000_wr_regs(priv, 0x15, "\x00\x7f", 2);
 329                 else if (i == 2)
 330                         ret = e4000_wr_regs(priv, 0x15, "\x01", 1);
 331                 else
 332                         ret = e4000_wr_regs(priv, 0x16, "\x7e", 1);
 333
 334                 if (ret < 0)
 335                         goto err;
 336
 337                 ret = e4000_wr_reg(priv, 0x29, 0x01);
 338                 if (ret < 0)
 339                         goto err;
 340
 341                 ret = e4000_rd_regs(priv, 0x2a, buf, 3);
 342                 if (ret < 0)
 343                         goto err;
 344
 345                 i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
 346                 q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
 347         }
 348
 349         swap(q_data[2], q_data[3]);
 350         swap(i_data[2], i_data[3]);
 351
 352         ret = e4000_wr_regs(priv, 0x50, q_data, 4);
 353         if (ret < 0)
 354                 goto err;
 355
 356         ret = e4000_wr_regs(priv, 0x60, i_data, 4);
 357         if (ret < 0)
 358                 goto err;
 359
 360         /* gain control auto */
 361         ret = e4000_wr_reg(priv, 0x1a, 0x17);
 362         if (ret < 0)
 363                 goto err;
 364
 365         if (fe->ops.i2c_gate_ctrl)
 366                 fe->ops.i2c_gate_ctrl(fe, 0);
 367
 368         return 0;
 369 err:
 370         if (fe->ops.i2c_gate_ctrl)
 371                 fe->ops.i2c_gate_ctrl(fe, 0);
 372
 373         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 374         return ret;
 375 }
 376
 377 static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 378 {
 379         struct e4000_priv *priv = fe->tuner_priv;
 380
 381         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 382
 383         *frequency = 0; /* Zero-IF */
 384
 385         return 0;
 386 }
 387
 388 static int e4000_set_lna_gain(struct dvb_frontend *fe)
 389 {
 390         struct e4000_priv *priv = fe->tuner_priv;
 391         int ret;
 392         u8 u8tmp;
 393         dev_dbg(&priv->client->dev, "%s: lna auto=%d->%d val=%d->%d\n",
 394                         __func__, priv->lna_gain_auto->cur.val,
 395                         priv->lna_gain_auto->val, priv->lna_gain->cur.val,
 396                         priv->lna_gain->val);
 397
 398         if (fe->ops.i2c_gate_ctrl)
 399                 fe->ops.i2c_gate_ctrl(fe, 1);
 400
 401         if (priv->lna_gain_auto->val && priv->if_gain_auto->cur.val)
 402                 u8tmp = 0x17;
 403         else if (priv->lna_gain_auto->val)
 404                 u8tmp = 0x19;
 405         else if (priv->if_gain_auto->cur.val)
 406                 u8tmp = 0x16;
 407         else
 408                 u8tmp = 0x10;
 409
 410         ret = e4000_wr_reg(priv, 0x1a, u8tmp);
 411         if (ret)
 412                 goto err;
 413
 414         if (priv->lna_gain_auto->val == false) {
 415                 ret = e4000_wr_reg(priv, 0x14, priv->lna_gain->val);
 416                 if (ret)
 417                         goto err;
 418         }
 419
 420         if (fe->ops.i2c_gate_ctrl)
 421                 fe->ops.i2c_gate_ctrl(fe, 0);
 422
 423         return 0;
 424 err:
 425         if (fe->ops.i2c_gate_ctrl)
 426                 fe->ops.i2c_gate_ctrl(fe, 0);
 427
 428         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 429         return ret;
 430 }
 431
 432 static int e4000_set_mixer_gain(struct dvb_frontend *fe)
 433 {
 434         struct e4000_priv *priv = fe->tuner_priv;
 435         int ret;
 436         u8 u8tmp;
 437         dev_dbg(&priv->client->dev, "%s: mixer auto=%d->%d val=%d->%d\n",
 438                         __func__, priv->mixer_gain_auto->cur.val,
 439                         priv->mixer_gain_auto->val, priv->mixer_gain->cur.val,
 440                         priv->mixer_gain->val);
 441
 442         if (fe->ops.i2c_gate_ctrl)
 443                 fe->ops.i2c_gate_ctrl(fe, 1);
 444
 445         if (priv->mixer_gain_auto->val)
 446                 u8tmp = 0x15;
 447         else
 448                 u8tmp = 0x14;
 449
 450         ret = e4000_wr_reg(priv, 0x20, u8tmp);
 451         if (ret)
 452                 goto err;
 453
 454         if (priv->mixer_gain_auto->val == false) {
 455                 ret = e4000_wr_reg(priv, 0x15, priv->mixer_gain->val);
 456                 if (ret)
 457                         goto err;
 458         }
 459
 460         if (fe->ops.i2c_gate_ctrl)
 461                 fe->ops.i2c_gate_ctrl(fe, 0);
 462
 463         return 0;
 464 err:
 465         if (fe->ops.i2c_gate_ctrl)
 466                 fe->ops.i2c_gate_ctrl(fe, 0);
 467
 468         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 469         return ret;
 470 }
 471
 472 static int e4000_set_if_gain(struct dvb_frontend *fe)
 473 {
 474         struct e4000_priv *priv = fe->tuner_priv;
 475         int ret;
 476         u8 buf[2];
 477         u8 u8tmp;
 478         dev_dbg(&priv->client->dev, "%s: if auto=%d->%d val=%d->%d\n",
 479                         __func__, priv->if_gain_auto->cur.val,
 480                         priv->if_gain_auto->val, priv->if_gain->cur.val,
 481                         priv->if_gain->val);
 482
 483         if (fe->ops.i2c_gate_ctrl)
 484                 fe->ops.i2c_gate_ctrl(fe, 1);
 485
 486         if (priv->if_gain_auto->val && priv->lna_gain_auto->cur.val)
 487                 u8tmp = 0x17;
 488         else if (priv->lna_gain_auto->cur.val)
 489                 u8tmp = 0x19;
 490         else if (priv->if_gain_auto->val)
 491                 u8tmp = 0x16;
 492         else
 493                 u8tmp = 0x10;
 494
 495         ret = e4000_wr_reg(priv, 0x1a, u8tmp);
 496         if (ret)
 497                 goto err;
 498
 499         if (priv->if_gain_auto->val == false) {
 500                 buf[0] = e4000_if_gain_lut[priv->if_gain->val].reg16_val;
 501                 buf[1] = e4000_if_gain_lut[priv->if_gain->val].reg17_val;
 502                 ret = e4000_wr_regs(priv, 0x16, buf, 2);
 503                 if (ret)
 504                         goto err;
 505         }
 506
 507         if (fe->ops.i2c_gate_ctrl)
 508                 fe->ops.i2c_gate_ctrl(fe, 0);
 509
 510         return 0;
 511 err:
 512         if (fe->ops.i2c_gate_ctrl)
 513                 fe->ops.i2c_gate_ctrl(fe, 0);
 514
 515         dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 516         return ret;
 517 }
 518
 519 static int e4000_pll_lock(struct dvb_frontend *fe)
 520 {
 521         struct e4000_priv *priv = fe->tuner_priv;
 522         int ret;
 523         u8 u8tmp;
 524
 525         if (priv->active == false)
 526                 return 0;
 527
 528         if (fe->ops.i2c_gate_ctrl)
 529                 fe->ops.i2c_gate_ctrl(fe, 1);
 530
 531         ret = e4000_rd_reg(priv, 0x07, &u8tmp);
 532         if (ret)
 533                 goto err;
 534
 535         priv->pll_lock->val = (u8tmp & 0x01);
 536 err:
 537         if (fe->ops.i2c_gate_ctrl)
 538                 fe->ops.i2c_gate_ctrl(fe, 0);
 539
 540         if (ret)
 541                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 542
 543         return ret;
 544 }
 545
 546 static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 547 {
 548         struct e4000_priv *priv =
 549                         container_of(ctrl->handler, struct e4000_priv, hdl);
 550         int ret;
 551
 552         switch (ctrl->id) {
 553         case  V4L2_CID_RF_TUNER_PLL_LOCK:
 554                 ret = e4000_pll_lock(priv->fe);
 555                 break;
 556         default:
 557                 ret = -EINVAL;
 558         }
 559
 560         return ret;
 561 }
 562
 563 static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
 564 {
 565         struct e4000_priv *priv =
 566                         container_of(ctrl->handler, struct e4000_priv, hdl);
 567         struct dvb_frontend *fe = priv->fe;
 568         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 569         int ret;
 570         dev_dbg(&priv->client->dev,
 571                         "%s: id=%d name=%s val=%d min=%d max=%d step=%d\n",
 572                         __func__, ctrl->id, ctrl->name, ctrl->val,
 573                         ctrl->minimum, ctrl->maximum, ctrl->step);
 574
 575         switch (ctrl->id) {
 576         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
 577         case V4L2_CID_RF_TUNER_BANDWIDTH:
 578                 c->bandwidth_hz = priv->bandwidth->val;
 579                 ret = e4000_set_params(priv->fe);
 580                 break;
 581         case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
 582         case  V4L2_CID_RF_TUNER_LNA_GAIN:
 583                 ret = e4000_set_lna_gain(priv->fe);
 584                 break;
 585         case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
 586         case  V4L2_CID_RF_TUNER_MIXER_GAIN:
 587                 ret = e4000_set_mixer_gain(priv->fe);
 588                 break;
 589         case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
 590         case  V4L2_CID_RF_TUNER_IF_GAIN:
 591                 ret = e4000_set_if_gain(priv->fe);
 592                 break;
 593         default:
 594                 ret = -EINVAL;
 595         }
 596
 597         return ret;
 598 }
 599
 600 static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
 601         .g_volatile_ctrl = e4000_g_volatile_ctrl,
 602         .s_ctrl = e4000_s_ctrl,
 603 };
 604
 605 static const struct dvb_tuner_ops e4000_tuner_ops = {
 606         .info = {
 607                 .name           = "Elonics E4000",
 608                 .frequency_min  = 174000000,
 609                 .frequency_max  = 862000000,
 610         },
 611
 612         .init = e4000_init,
 613         .sleep = e4000_sleep,
 614         .set_params = e4000_set_params,
 615
 616         .get_if_frequency = e4000_get_if_frequency,
 617 };
 618
 619 /*
 620  * Use V4L2 subdev to carry V4L2 control handler, even we don't implement
 621  * subdev itself, just to avoid reinventing the wheel.
 622  */
 623 static int e4000_probe(struct i2c_client *client,
 624                 const struct i2c_device_id *id)
 625 {
 626         struct e4000_config *cfg = client->dev.platform_data;
 627         struct dvb_frontend *fe = cfg->fe;
 628         struct e4000_priv *priv;
 629         int ret;
 630         u8 chip_id;
 631
 632         if (fe->ops.i2c_gate_ctrl)
 633                 fe->ops.i2c_gate_ctrl(fe, 1);
 634
 635         priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);
 636         if (!priv) {
 637                 ret = -ENOMEM;
 638                 dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
 639                 goto err;
 640         }
 641
 642         priv->clock = cfg->clock;
 643         priv->client = client;
 644         priv->fe = cfg->fe;
 645
 646         /* check if the tuner is there */
 647         ret = e4000_rd_reg(priv, 0x02, &chip_id);
 648         if (ret < 0)
 649                 goto err;
 650
 651         dev_dbg(&priv->client->dev,
 652                         "%s: chip_id=%02x\n", __func__, chip_id);
 653
 654         if (chip_id != 0x40) {
 655                 ret = -ENODEV;
 656                 goto err;
 657         }
 658
 659         /* put sleep as chip seems to be in normal mode by default */
 660         ret = e4000_wr_reg(priv, 0x00, 0x00);
 661         if (ret < 0)
 662                 goto err;
 663
 664         /* Register controls */
 665         v4l2_ctrl_handler_init(&priv->hdl, 9);
 666         priv->bandwidth_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 667                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
 668         priv->bandwidth = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 669                         V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
 670         v4l2_ctrl_auto_cluster(2, &priv->bandwidth_auto, 0, false);
 671         priv->lna_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 672                         V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
 673         priv->lna_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 674                         V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
 675         v4l2_ctrl_auto_cluster(2, &priv->lna_gain_auto, 0, false);
 676         priv->mixer_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 677                         V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
 678         priv->mixer_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 679                         V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
 680         v4l2_ctrl_auto_cluster(2, &priv->mixer_gain_auto, 0, false);
 681         priv->if_gain_auto = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 682                         V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
 683         priv->if_gain = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 684                         V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
 685         v4l2_ctrl_auto_cluster(2, &priv->if_gain_auto, 0, false);
 686         priv->pll_lock = v4l2_ctrl_new_std(&priv->hdl, &e4000_ctrl_ops,
 687                         V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
 688         if (priv->hdl.error) {
 689                 ret = priv->hdl.error;
 690                 dev_err(&priv->client->dev, "Could not initialize controls\n");
 691                 v4l2_ctrl_handler_free(&priv->hdl);
 692                 goto err;
 693         }
 694
 695         priv->sd.ctrl_handler = &priv->hdl;
 696
 697         dev_info(&priv->client->dev,
 698                         "%s: Elonics E4000 successfully identified\n",
 699                         KBUILD_MODNAME);
 700
 701         fe->tuner_priv = priv;
 702         memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
 703                         sizeof(struct dvb_tuner_ops));
 704
 705         v4l2_set_subdevdata(&priv->sd, client);
 706         i2c_set_clientdata(client, &priv->sd);
 707
 708         if (fe->ops.i2c_gate_ctrl)
 709                 fe->ops.i2c_gate_ctrl(fe, 0);
 710
 711         return 0;
 712 err:
 713         if (fe->ops.i2c_gate_ctrl)
 714                 fe->ops.i2c_gate_ctrl(fe, 0);
 715
 716         dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
 717         kfree(priv);
 718         return ret;
 719 }
 720
 721 static int e4000_remove(struct i2c_client *client)
 722 {
 723         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 724         struct e4000_priv *priv = container_of(sd, struct e4000_priv, sd);
 725         struct dvb_frontend *fe = priv->fe;
 726
 727         dev_dbg(&client->dev, "%s:\n", __func__);
 728         v4l2_ctrl_handler_free(&priv->hdl);
 729         memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 730         fe->tuner_priv = NULL;
 731         kfree(priv);
 732
 733         return 0;
 734 }
 735
 736 static const struct i2c_device_id e4000_id[] = {
 737         {"e4000", 0},
 738         {}
 739 };
 740 MODULE_DEVICE_TABLE(i2c, e4000_id);
 741
 742 static struct i2c_driver e4000_driver = {
 743         .driver = {
 744                 .owner  = THIS_MODULE,
 745                 .name   = "e4000",
 746         },
 747         .probe          = e4000_probe,
 748         .remove         = e4000_remove,
 749         .id_table       = e4000_id,
 750 };
 751
 752 module_i2c_driver(e4000_driver);
 753
 754 MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
 755 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 756 MODULE_LICENSE("GPL");