drivers/media/tuners/m88ts2022.c

   1 /*
   2  * Montage M88TS2022 silicon tuner driver
   3  *
   4  * Copyright (C) 2013 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  * Some calculations are taken from existing TS2020 driver.
  17  */
  18
  19 #include "m88ts2022_priv.h"
  20
  21 /* write multiple registers */
  22 static int m88ts2022_wr_regs(struct m88ts2022_priv *priv,
  23                 u8 reg, const u8 *val, int len)
  24 {
  25 #define MAX_WR_LEN 3
  26 #define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
  27         int ret;
  28         u8 buf[MAX_WR_XFER_LEN];
  29         struct i2c_msg msg[1] = {
  30                 {
  31                         .addr = priv->client->addr,
  32                         .flags = 0,
  33                         .len = 1 + len,
  34                         .buf = buf,
  35                 }
  36         };
  37
  38         if (WARN_ON(len > MAX_WR_LEN))
  39                 return -EINVAL;
  40
  41         buf[0] = reg;
  42         memcpy(&buf[1], val, len);
  43
  44         ret = i2c_transfer(priv->client->adapter, msg, 1);
  45         if (ret == 1) {
  46                 ret = 0;
  47         } else {
  48                 dev_warn(&priv->client->dev,
  49                                 "%s: i2c wr failed=%d reg=%02x len=%d\n",
  50                                 KBUILD_MODNAME, ret, reg, len);
  51                 ret = -EREMOTEIO;
  52         }
  53
  54         return ret;
  55 }
  56
  57 /* read multiple registers */
  58 static int m88ts2022_rd_regs(struct m88ts2022_priv *priv, u8 reg,
  59                 u8 *val, int len)
  60 {
  61 #define MAX_RD_LEN 1
  62 #define MAX_RD_XFER_LEN (MAX_RD_LEN)
  63         int ret;
  64         u8 buf[MAX_RD_XFER_LEN];
  65         struct i2c_msg msg[2] = {
  66                 {
  67                         .addr = priv->client->addr,
  68                         .flags = 0,
  69                         .len = 1,
  70                         .buf = &reg,
  71                 }, {
  72                         .addr = priv->client->addr,
  73                         .flags = I2C_M_RD,
  74                         .len = len,
  75                         .buf = buf,
  76                 }
  77         };
  78
  79         if (WARN_ON(len > MAX_RD_LEN))
  80                 return -EINVAL;
  81
  82         ret = i2c_transfer(priv->client->adapter, msg, 2);
  83         if (ret == 2) {
  84                 memcpy(val, buf, len);
  85                 ret = 0;
  86         } else {
  87                 dev_warn(&priv->client->dev,
  88                                 "%s: i2c rd failed=%d reg=%02x len=%d\n",
  89                                 KBUILD_MODNAME, ret, reg, len);
  90                 ret = -EREMOTEIO;
  91         }
  92
  93         return ret;
  94 }
  95
  96 /* write single register */
  97 static int m88ts2022_wr_reg(struct m88ts2022_priv *priv, u8 reg, u8 val)
  98 {
  99         return m88ts2022_wr_regs(priv, reg, &val, 1);
 100 }
 101
 102 /* read single register */
 103 static int m88ts2022_rd_reg(struct m88ts2022_priv *priv, u8 reg, u8 *val)
 104 {
 105         return m88ts2022_rd_regs(priv, reg, val, 1);
 106 }
 107
 108 /* write single register with mask */
 109 static int m88ts2022_wr_reg_mask(struct m88ts2022_priv *priv,
 110                 u8 reg, u8 val, u8 mask)
 111 {
 112         int ret;
 113         u8 u8tmp;
 114
 115         /* no need for read if whole reg is written */
 116         if (mask != 0xff) {
 117                 ret = m88ts2022_rd_regs(priv, reg, &u8tmp, 1);
 118                 if (ret)
 119                         return ret;
 120
 121                 val &= mask;
 122                 u8tmp &= ~mask;
 123                 val |= u8tmp;
 124         }
 125
 126         return m88ts2022_wr_regs(priv, reg, &val, 1);
 127 }
 128
 129 static int m88ts2022_cmd(struct dvb_frontend *fe,
 130                 int op, int sleep, u8 reg, u8 mask, u8 val, u8 *reg_val)
 131 {
 132         struct m88ts2022_priv *priv = fe->tuner_priv;
 133         int ret, i;
 134         u8 u8tmp;
 135         struct m88ts2022_reg_val reg_vals[] = {
 136                 {0x51, 0x1f - op},
 137                 {0x51, 0x1f},
 138                 {0x50, 0x00 + op},
 139                 {0x50, 0x00},
 140         };
 141
 142         for (i = 0; i < 2; i++) {
 143                 dev_dbg(&priv->client->dev,
 144                                 "%s: i=%d op=%02x reg=%02x mask=%02x val=%02x\n",
 145                                 __func__, i, op, reg, mask, val);
 146
 147                 for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
 148                         ret = m88ts2022_wr_reg(priv, reg_vals[i].reg,
 149                                         reg_vals[i].val);
 150                         if (ret)
 151                                 goto err;
 152                 }
 153
 154                 usleep_range(sleep * 1000, sleep * 10000);
 155
 156                 ret = m88ts2022_rd_reg(priv, reg, &u8tmp);
 157                 if (ret)
 158                         goto err;
 159
 160                 if ((u8tmp & mask) != val)
 161                         break;
 162         }
 163
 164         if (reg_val)
 165                 *reg_val = u8tmp;
 166 err:
 167         return ret;
 168 }
 169
 170 static int m88ts2022_set_params(struct dvb_frontend *fe)
 171 {
 172         struct m88ts2022_priv *priv = fe->tuner_priv;
 173         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 174         int ret;
 175         unsigned int frequency_khz, frequency_offset_khz, f_3db_hz;
 176         unsigned int f_ref_khz, f_vco_khz, div_ref, div_out, pll_n, gdiv28;
 177         u8 buf[3], u8tmp, cap_code, lpf_gm, lpf_mxdiv, div_max, div_min;
 178         u16 u16tmp;
 179         dev_dbg(&priv->client->dev,
 180                         "%s: frequency=%d symbol_rate=%d rolloff=%d\n",
 181                         __func__, c->frequency, c->symbol_rate, c->rolloff);
 182         /*
 183          * Integer-N PLL synthesizer
 184          * kHz is used for all calculations to keep calculations within 32-bit
 185          */
 186         f_ref_khz = DIV_ROUND_CLOSEST(priv->cfg.clock, 1000);
 187         div_ref = DIV_ROUND_CLOSEST(f_ref_khz, 2000);
 188
 189         if (c->symbol_rate < 5000000)
 190                 frequency_offset_khz = 3000; /* 3 MHz */
 191         else
 192                 frequency_offset_khz = 0;
 193
 194         frequency_khz = c->frequency + frequency_offset_khz;
 195
 196         if (frequency_khz < 1103000) {
 197                 div_out = 4;
 198                 u8tmp = 0x1b;
 199         } else {
 200                 div_out = 2;
 201                 u8tmp = 0x0b;
 202         }
 203
 204         buf[0] = u8tmp;
 205         buf[1] = 0x40;
 206         ret = m88ts2022_wr_regs(priv, 0x10, buf, 2);
 207         if (ret)
 208                 goto err;
 209
 210         f_vco_khz = frequency_khz * div_out;
 211         pll_n = f_vco_khz * div_ref / f_ref_khz;
 212         pll_n += pll_n % 2;
 213         priv->frequency_khz = pll_n * f_ref_khz / div_ref / div_out;
 214
 215         if (pll_n < 4095)
 216                 u16tmp = pll_n - 1024;
 217         else if (pll_n < 6143)
 218                 u16tmp = pll_n + 1024;
 219         else
 220                 u16tmp = pll_n + 3072;
 221
 222         buf[0] = (u16tmp >> 8) & 0x3f;
 223         buf[1] = (u16tmp >> 0) & 0xff;
 224         buf[2] = div_ref - 8;
 225         ret = m88ts2022_wr_regs(priv, 0x01, buf, 3);
 226         if (ret)
 227                 goto err;
 228
 229         dev_dbg(&priv->client->dev,
 230                         "%s: frequency=%u offset=%d f_vco_khz=%u pll_n=%u div_ref=%u div_out=%u\n",
 231                         __func__, priv->frequency_khz,
 232                         priv->frequency_khz - c->frequency, f_vco_khz, pll_n,
 233                         div_ref, div_out);
 234
 235         ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
 236         if (ret)
 237                 goto err;
 238
 239         ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
 240         if (ret)
 241                 goto err;
 242
 243         u8tmp &= 0x7f;
 244         if (u8tmp < 64) {
 245                 ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x80, 0x80);
 246                 if (ret)
 247                         goto err;
 248
 249                 ret = m88ts2022_wr_reg(priv, 0x11, 0x6f);
 250                 if (ret)
 251                         goto err;
 252
 253                 ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
 254                 if (ret)
 255                         goto err;
 256         }
 257
 258         ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
 259         if (ret)
 260                 goto err;
 261
 262         u8tmp &= 0x1f;
 263         if (u8tmp > 19) {
 264                 ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x00, 0x02);
 265                 if (ret)
 266                         goto err;
 267         }
 268
 269         ret = m88ts2022_cmd(fe, 0x08, 5, 0x3c, 0xff, 0x00, NULL);
 270         if (ret)
 271                 goto err;
 272
 273         ret = m88ts2022_wr_reg(priv, 0x25, 0x00);
 274         if (ret)
 275                 goto err;
 276
 277         ret = m88ts2022_wr_reg(priv, 0x27, 0x70);
 278         if (ret)
 279                 goto err;
 280
 281         ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
 282         if (ret)
 283                 goto err;
 284
 285         ret = m88ts2022_wr_reg(priv, 0x08, 0x0b);
 286         if (ret)
 287                 goto err;
 288
 289         /* filters */
 290         gdiv28 = DIV_ROUND_CLOSEST(f_ref_khz * 1694U, 1000000U);
 291
 292         ret = m88ts2022_wr_reg(priv, 0x04, gdiv28);
 293         if (ret)
 294                 goto err;
 295
 296         ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
 297         if (ret)
 298                 goto err;
 299
 300         cap_code = u8tmp & 0x3f;
 301
 302         ret = m88ts2022_wr_reg(priv, 0x41, 0x0d);
 303         if (ret)
 304                 goto err;
 305
 306         ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
 307         if (ret)
 308                 goto err;
 309
 310         u8tmp &= 0x3f;
 311         cap_code = (cap_code + u8tmp) / 2;
 312         gdiv28 = gdiv28 * 207 / (cap_code * 2 + 151);
 313         div_max = gdiv28 * 135 / 100;
 314         div_min = gdiv28 * 78 / 100;
 315         div_max = clamp_val(div_max, 0U, 63U);
 316
 317         f_3db_hz = c->symbol_rate * 135UL / 200UL;
 318         f_3db_hz +=  2000000U + (frequency_offset_khz * 1000U);
 319         f_3db_hz = clamp(f_3db_hz, 7000000U, 40000000U);
 320
 321 #define LPF_COEFF 3200U
 322         lpf_gm = DIV_ROUND_CLOSEST(f_3db_hz * gdiv28, LPF_COEFF * f_ref_khz);
 323         lpf_gm = clamp_val(lpf_gm, 1U, 23U);
 324
 325         lpf_mxdiv = DIV_ROUND_CLOSEST(lpf_gm * LPF_COEFF * f_ref_khz, f_3db_hz);
 326         if (lpf_mxdiv < div_min)
 327                 lpf_mxdiv = DIV_ROUND_CLOSEST(++lpf_gm * LPF_COEFF * f_ref_khz, f_3db_hz);
 328         lpf_mxdiv = clamp_val(lpf_mxdiv, 0U, div_max);
 329
 330         ret = m88ts2022_wr_reg(priv, 0x04, lpf_mxdiv);
 331         if (ret)
 332                 goto err;
 333
 334         ret = m88ts2022_wr_reg(priv, 0x06, lpf_gm);
 335         if (ret)
 336                 goto err;
 337
 338         ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
 339         if (ret)
 340                 goto err;
 341
 342         cap_code = u8tmp & 0x3f;
 343
 344         ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
 345         if (ret)
 346                 goto err;
 347
 348         ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
 349         if (ret)
 350                 goto err;
 351
 352         u8tmp &= 0x3f;
 353         cap_code = (cap_code + u8tmp) / 2;
 354
 355         u8tmp = cap_code | 0x80;
 356         ret = m88ts2022_wr_reg(priv, 0x25, u8tmp);
 357         if (ret)
 358                 goto err;
 359
 360         ret = m88ts2022_wr_reg(priv, 0x27, 0x30);
 361         if (ret)
 362                 goto err;
 363
 364         ret = m88ts2022_wr_reg(priv, 0x08, 0x09);
 365         if (ret)
 366                 goto err;
 367
 368         ret = m88ts2022_cmd(fe, 0x01, 20, 0x21, 0xff, 0x00, NULL);
 369         if (ret)
 370                 goto err;
 371 err:
 372         if (ret)
 373                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 374
 375         return ret;
 376 }
 377
 378 static int m88ts2022_init(struct dvb_frontend *fe)
 379 {
 380         struct m88ts2022_priv *priv = fe->tuner_priv;
 381         int ret, i;
 382         u8 u8tmp;
 383         static const struct m88ts2022_reg_val reg_vals[] = {
 384                 {0x7d, 0x9d},
 385                 {0x7c, 0x9a},
 386                 {0x7a, 0x76},
 387                 {0x3b, 0x01},
 388                 {0x63, 0x88},
 389                 {0x61, 0x85},
 390                 {0x22, 0x30},
 391                 {0x30, 0x40},
 392                 {0x20, 0x23},
 393                 {0x24, 0x02},
 394                 {0x12, 0xa0},
 395         };
 396         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 397
 398         ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
 399         if (ret)
 400                 goto err;
 401
 402         ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
 403         if (ret)
 404                 goto err;
 405
 406         switch (priv->cfg.clock_out) {
 407         case M88TS2022_CLOCK_OUT_DISABLED:
 408                 u8tmp = 0x60;
 409                 break;
 410         case M88TS2022_CLOCK_OUT_ENABLED:
 411                 u8tmp = 0x70;
 412                 ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg.clock_out_div);
 413                 if (ret)
 414                         goto err;
 415                 break;
 416         case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
 417                 u8tmp = 0x6c;
 418                 break;
 419         default:
 420                 goto err;
 421         }
 422
 423         ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
 424         if (ret)
 425                 goto err;
 426
 427         if (priv->cfg.loop_through)
 428                 u8tmp = 0xec;
 429         else
 430                 u8tmp = 0x6c;
 431
 432         ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
 433         if (ret)
 434                 goto err;
 435
 436         for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
 437                 ret = m88ts2022_wr_reg(priv, reg_vals[i].reg, reg_vals[i].val);
 438                 if (ret)
 439                         goto err;
 440         }
 441 err:
 442         if (ret)
 443                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 444         return ret;
 445 }
 446
 447 static int m88ts2022_sleep(struct dvb_frontend *fe)
 448 {
 449         struct m88ts2022_priv *priv = fe->tuner_priv;
 450         int ret;
 451         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 452
 453         ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
 454         if (ret)
 455                 goto err;
 456 err:
 457         if (ret)
 458                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 459         return ret;
 460 }
 461
 462 static int m88ts2022_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 463 {
 464         struct m88ts2022_priv *priv = fe->tuner_priv;
 465         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 466
 467         *frequency = priv->frequency_khz;
 468         return 0;
 469 }
 470
 471 static int m88ts2022_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 472 {
 473         struct m88ts2022_priv *priv = fe->tuner_priv;
 474         dev_dbg(&priv->client->dev, "%s:\n", __func__);
 475
 476         *frequency = 0; /* Zero-IF */
 477         return 0;
 478 }
 479
 480 static int m88ts2022_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
 481 {
 482         struct m88ts2022_priv *priv = fe->tuner_priv;
 483         int ret;
 484         u8 u8tmp;
 485         u16 gain, u16tmp;
 486         unsigned int gain1, gain2, gain3;
 487
 488         ret = m88ts2022_rd_reg(priv, 0x3d, &u8tmp);
 489         if (ret)
 490                 goto err;
 491
 492         gain1 = (u8tmp >> 0) & 0x1f;
 493         gain1 = clamp(gain1, 0U, 15U);
 494
 495         ret = m88ts2022_rd_reg(priv, 0x21, &u8tmp);
 496         if (ret)
 497                 goto err;
 498
 499         gain2 = (u8tmp >> 0) & 0x1f;
 500         gain2 = clamp(gain2, 2U, 16U);
 501
 502         ret = m88ts2022_rd_reg(priv, 0x66, &u8tmp);
 503         if (ret)
 504                 goto err;
 505
 506         gain3 = (u8tmp >> 3) & 0x07;
 507         gain3 = clamp(gain3, 0U, 6U);
 508
 509         gain = gain1 * 265 + gain2 * 338 + gain3 * 285;
 510
 511         /* scale value to 0x0000-0xffff */
 512         u16tmp = (0xffff - gain);
 513         u16tmp = clamp_val(u16tmp, 59000U, 61500U);
 514
 515         *strength = (u16tmp - 59000) * 0xffff / (61500 - 59000);
 516 err:
 517         if (ret)
 518                 dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
 519         return ret;
 520 }
 521
 522 static const struct dvb_tuner_ops m88ts2022_tuner_ops = {
 523         .info = {
 524                 .name          = "Montage M88TS2022",
 525                 .frequency_min = 950000,
 526                 .frequency_max = 2150000,
 527         },
 528
 529         .init = m88ts2022_init,
 530         .sleep = m88ts2022_sleep,
 531         .set_params = m88ts2022_set_params,
 532
 533         .get_frequency = m88ts2022_get_frequency,
 534         .get_if_frequency = m88ts2022_get_if_frequency,
 535         .get_rf_strength = m88ts2022_get_rf_strength,
 536 };
 537
 538 static int m88ts2022_probe(struct i2c_client *client,
 539                 const struct i2c_device_id *id)
 540 {
 541         struct m88ts2022_config *cfg = client->dev.platform_data;
 542         struct dvb_frontend *fe = cfg->fe;
 543         struct m88ts2022_priv *priv;
 544         int ret;
 545         u8 chip_id, u8tmp;
 546
 547         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 548         if (!priv) {
 549                 ret = -ENOMEM;
 550                 dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
 551                 goto err;
 552         }
 553
 554         memcpy(&priv->cfg, cfg, sizeof(struct m88ts2022_config));
 555         priv->client = client;
 556
 557         /* check if the tuner is there */
 558         ret = m88ts2022_rd_reg(priv, 0x00, &u8tmp);
 559         if (ret)
 560                 goto err;
 561
 562         if ((u8tmp & 0x03) == 0x00) {
 563                 ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
 564                 if (ret < 0)
 565                         goto err;
 566
 567                 usleep_range(2000, 50000);
 568         }
 569
 570         ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
 571         if (ret)
 572                 goto err;
 573
 574         usleep_range(2000, 50000);
 575
 576         ret = m88ts2022_rd_reg(priv, 0x00, &chip_id);
 577         if (ret)
 578                 goto err;
 579
 580         dev_dbg(&priv->client->dev, "%s: chip_id=%02x\n", __func__, chip_id);
 581
 582         switch (chip_id) {
 583         case 0xc3:
 584         case 0x83:
 585                 break;
 586         default:
 587                 goto err;
 588         }
 589
 590         switch (priv->cfg.clock_out) {
 591         case M88TS2022_CLOCK_OUT_DISABLED:
 592                 u8tmp = 0x60;
 593                 break;
 594         case M88TS2022_CLOCK_OUT_ENABLED:
 595                 u8tmp = 0x70;
 596                 ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg.clock_out_div);
 597                 if (ret)
 598                         goto err;
 599                 break;
 600         case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
 601                 u8tmp = 0x6c;
 602                 break;
 603         default:
 604                 goto err;
 605         }
 606
 607         ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
 608         if (ret)
 609                 goto err;
 610
 611         if (priv->cfg.loop_through)
 612                 u8tmp = 0xec;
 613         else
 614                 u8tmp = 0x6c;
 615
 616         ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
 617         if (ret)
 618                 goto err;
 619
 620         /* sleep */
 621         ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
 622         if (ret)
 623                 goto err;
 624
 625         dev_info(&priv->client->dev,
 626                         "%s: Montage M88TS2022 successfully identified\n",
 627                         KBUILD_MODNAME);
 628
 629         fe->tuner_priv = priv;
 630         memcpy(&fe->ops.tuner_ops, &m88ts2022_tuner_ops,
 631                         sizeof(struct dvb_tuner_ops));
 632
 633         i2c_set_clientdata(client, priv);
 634         return 0;
 635 err:
 636         dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
 637         kfree(priv);
 638         return ret;
 639 }
 640
 641 static int m88ts2022_remove(struct i2c_client *client)
 642 {
 643         struct m88ts2022_priv *priv = i2c_get_clientdata(client);
 644         struct dvb_frontend *fe = priv->cfg.fe;
 645         dev_dbg(&client->dev, "%s:\n", __func__);
 646
 647         memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
 648         fe->tuner_priv = NULL;
 649         kfree(priv);
 650
 651         return 0;
 652 }
 653
 654 static const struct i2c_device_id m88ts2022_id[] = {
 655         {"m88ts2022", 0},
 656         {}
 657 };
 658 MODULE_DEVICE_TABLE(i2c, m88ts2022_id);
 659
 660 static struct i2c_driver m88ts2022_driver = {
 661         .driver = {
 662                 .owner  = THIS_MODULE,
 663                 .name   = "m88ts2022",
 664         },
 665         .probe          = m88ts2022_probe,
 666         .remove         = m88ts2022_remove,
 667         .id_table       = m88ts2022_id,
 668 };
 669
 670 module_i2c_driver(m88ts2022_driver);
 671
 672 MODULE_DESCRIPTION("Montage M88TS2022 silicon tuner driver");
 673 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 674 MODULE_LICENSE("GPL");