drivers/media/dvb-frontends/stv6111.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Driver for the ST STV6111 tuner
   4  *
   5  * Copyright (C) 2014 Digital Devices GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 only, as published by the Free Software Foundation.
  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
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/init.h>
  21 #include <linux/delay.h>
  22 #include <linux/firmware.h>
  23 #include <linux/i2c.h>
  24 #include <asm/div64.h>
  25
  26 #include "stv6111.h"
  27
  28 #include <media/dvb_frontend.h>
  29
  30 struct stv {
  31         struct i2c_adapter *i2c;
  32         u8 adr;
  33
  34         u8 reg[11];
  35         u32 ref_freq;
  36         u32 frequency;
  37 };
  38
  39 struct slookup {
  40         s16 value;
  41         u16 reg_value;
  42 };
  43
  44 static const struct slookup lnagain_nf_lookup[] = {
  45         /* Gain *100dB // Reg */
  46         { 2572, 0 },
  47         { 2575, 1 },
  48         { 2580, 2 },
  49         { 2588, 3 },
  50         { 2596, 4 },
  51         { 2611, 5 },
  52         { 2633, 6 },
  53         { 2664, 7 },
  54         { 2701, 8 },
  55         { 2753, 9 },
  56         { 2816, 10 },
  57         { 2902, 11 },
  58         { 2995, 12 },
  59         { 3104, 13 },
  60         { 3215, 14 },
  61         { 3337, 15 },
  62         { 3492, 16 },
  63         { 3614, 17 },
  64         { 3731, 18 },
  65         { 3861, 19 },
  66         { 3988, 20 },
  67         { 4124, 21 },
  68         { 4253, 22 },
  69         { 4386, 23 },
  70         { 4505, 24 },
  71         { 4623, 25 },
  72         { 4726, 26 },
  73         { 4821, 27 },
  74         { 4903, 28 },
  75         { 4979, 29 },
  76         { 5045, 30 },
  77         { 5102, 31 }
  78 };
  79
  80 static const struct slookup lnagain_iip3_lookup[] = {
  81         /* Gain *100dB // reg */
  82         { 1548, 0 },
  83         { 1552, 1 },
  84         { 1569, 2 },
  85         { 1565, 3 },
  86         { 1577, 4 },
  87         { 1594, 5 },
  88         { 1627, 6 },
  89         { 1656, 7 },
  90         { 1700, 8 },
  91         { 1748, 9 },
  92         { 1805, 10 },
  93         { 1896, 11 },
  94         { 1995, 12 },
  95         { 2113, 13 },
  96         { 2233, 14 },
  97         { 2366, 15 },
  98         { 2543, 16 },
  99         { 2687, 17 },
 100         { 2842, 18 },
 101         { 2999, 19 },
 102         { 3167, 20 },
 103         { 3342, 21 },
 104         { 3507, 22 },
 105         { 3679, 23 },
 106         { 3827, 24 },
 107         { 3970, 25 },
 108         { 4094, 26 },
 109         { 4210, 27 },
 110         { 4308, 28 },
 111         { 4396, 29 },
 112         { 4468, 30 },
 113         { 4535, 31 }
 114 };
 115
 116 static const struct slookup gain_rfagc_lookup[] = {
 117         /* Gain *100dB // reg */
 118         { 4870, 0x3000 },
 119         { 4850, 0x3C00 },
 120         { 4800, 0x4500 },
 121         { 4750, 0x4800 },
 122         { 4700, 0x4B00 },
 123         { 4650, 0x4D00 },
 124         { 4600, 0x4F00 },
 125         { 4550, 0x5100 },
 126         { 4500, 0x5200 },
 127         { 4420, 0x5500 },
 128         { 4316, 0x5800 },
 129         { 4200, 0x5B00 },
 130         { 4119, 0x5D00 },
 131         { 3999, 0x6000 },
 132         { 3950, 0x6100 },
 133         { 3876, 0x6300 },
 134         { 3755, 0x6600 },
 135         { 3641, 0x6900 },
 136         { 3567, 0x6B00 },
 137         { 3425, 0x6F00 },
 138         { 3350, 0x7100 },
 139         { 3236, 0x7400 },
 140         { 3118, 0x7700 },
 141         { 3004, 0x7A00 },
 142         { 2917, 0x7C00 },
 143         { 2776, 0x7F00 },
 144         { 2635, 0x8200 },
 145         { 2516, 0x8500 },
 146         { 2406, 0x8800 },
 147         { 2290, 0x8B00 },
 148         { 2170, 0x8E00 },
 149         { 2073, 0x9100 },
 150         { 1949, 0x9400 },
 151         { 1836, 0x9700 },
 152         { 1712, 0x9A00 },
 153         { 1631, 0x9C00 },
 154         { 1515, 0x9F00 },
 155         { 1400, 0xA200 },
 156         { 1323, 0xA400 },
 157         { 1203, 0xA700 },
 158         { 1091, 0xAA00 },
 159         { 1011, 0xAC00 },
 160         { 904,  0xAF00 },
 161         { 787,  0xB200 },
 162         { 685,  0xB500 },
 163         { 571,  0xB800 },
 164         { 464,  0xBB00 },
 165         { 374,  0xBE00 },
 166         { 275,  0xC200 },
 167         { 181,  0xC600 },
 168         { 102,  0xCC00 },
 169         { 49,   0xD900 }
 170 };
 171
 172 /*
 173  * This table is 6 dB too low comapred to the others (probably created with
 174  * a different BB_MAG setting)
 175  */
 176 static const struct slookup gain_channel_agc_nf_lookup[] = {
 177         /* Gain *100dB // reg */
 178         { 7082, 0x3000 },
 179         { 7052, 0x4000 },
 180         { 7007, 0x4600 },
 181         { 6954, 0x4A00 },
 182         { 6909, 0x4D00 },
 183         { 6833, 0x5100 },
 184         { 6753, 0x5400 },
 185         { 6659, 0x5700 },
 186         { 6561, 0x5A00 },
 187         { 6472, 0x5C00 },
 188         { 6366, 0x5F00 },
 189         { 6259, 0x6100 },
 190         { 6151, 0x6400 },
 191         { 6026, 0x6700 },
 192         { 5920, 0x6900 },
 193         { 5835, 0x6B00 },
 194         { 5770, 0x6C00 },
 195         { 5681, 0x6E00 },
 196         { 5596, 0x7000 },
 197         { 5503, 0x7200 },
 198         { 5429, 0x7300 },
 199         { 5319, 0x7500 },
 200         { 5220, 0x7700 },
 201         { 5111, 0x7900 },
 202         { 4983, 0x7B00 },
 203         { 4876, 0x7D00 },
 204         { 4755, 0x7F00 },
 205         { 4635, 0x8100 },
 206         { 4499, 0x8300 },
 207         { 4405, 0x8500 },
 208         { 4323, 0x8600 },
 209         { 4233, 0x8800 },
 210         { 4156, 0x8A00 },
 211         { 4038, 0x8C00 },
 212         { 3935, 0x8E00 },
 213         { 3823, 0x9000 },
 214         { 3712, 0x9200 },
 215         { 3601, 0x9500 },
 216         { 3511, 0x9700 },
 217         { 3413, 0x9900 },
 218         { 3309, 0x9B00 },
 219         { 3213, 0x9D00 },
 220         { 3088, 0x9F00 },
 221         { 2992, 0xA100 },
 222         { 2878, 0xA400 },
 223         { 2769, 0xA700 },
 224         { 2645, 0xAA00 },
 225         { 2538, 0xAD00 },
 226         { 2441, 0xB000 },
 227         { 2350, 0xB600 },
 228         { 2237, 0xBA00 },
 229         { 2137, 0xBF00 },
 230         { 2039, 0xC500 },
 231         { 1938, 0xDF00 },
 232         { 1927, 0xFF00 }
 233 };
 234
 235 static const struct slookup gain_channel_agc_iip3_lookup[] = {
 236         /* Gain *100dB // reg */
 237         { 7070, 0x3000 },
 238         { 7028, 0x4000 },
 239         { 7019, 0x4600 },
 240         { 6900, 0x4A00 },
 241         { 6811, 0x4D00 },
 242         { 6763, 0x5100 },
 243         { 6690, 0x5400 },
 244         { 6644, 0x5700 },
 245         { 6617, 0x5A00 },
 246         { 6598, 0x5C00 },
 247         { 6462, 0x5F00 },
 248         { 6348, 0x6100 },
 249         { 6197, 0x6400 },
 250         { 6154, 0x6700 },
 251         { 6098, 0x6900 },
 252         { 5893, 0x6B00 },
 253         { 5812, 0x6C00 },
 254         { 5773, 0x6E00 },
 255         { 5723, 0x7000 },
 256         { 5661, 0x7200 },
 257         { 5579, 0x7300 },
 258         { 5460, 0x7500 },
 259         { 5308, 0x7700 },
 260         { 5099, 0x7900 },
 261         { 4910, 0x7B00 },
 262         { 4800, 0x7D00 },
 263         { 4785, 0x7F00 },
 264         { 4635, 0x8100 },
 265         { 4466, 0x8300 },
 266         { 4314, 0x8500 },
 267         { 4295, 0x8600 },
 268         { 4144, 0x8800 },
 269         { 3920, 0x8A00 },
 270         { 3889, 0x8C00 },
 271         { 3771, 0x8E00 },
 272         { 3655, 0x9000 },
 273         { 3446, 0x9200 },
 274         { 3298, 0x9500 },
 275         { 3083, 0x9700 },
 276         { 3015, 0x9900 },
 277         { 2833, 0x9B00 },
 278         { 2746, 0x9D00 },
 279         { 2632, 0x9F00 },
 280         { 2598, 0xA100 },
 281         { 2480, 0xA400 },
 282         { 2236, 0xA700 },
 283         { 2171, 0xAA00 },
 284         { 2060, 0xAD00 },
 285         { 1999, 0xB000 },
 286         { 1974, 0xB600 },
 287         { 1820, 0xBA00 },
 288         { 1741, 0xBF00 },
 289         { 1655, 0xC500 },
 290         { 1444, 0xDF00 },
 291         { 1325, 0xFF00 },
 292 };
 293
 294 static inline u32 muldiv32(u32 a, u32 b, u32 c)
 295 {
 296         u64 tmp64;
 297
 298         tmp64 = (u64)a * (u64)b;
 299         do_div(tmp64, c);
 300
 301         return (u32)tmp64;
 302 }
 303
 304 static int i2c_read(struct i2c_adapter *adap,
 305                     u8 adr, u8 *msg, int len, u8 *answ, int alen)
 306 {
 307         struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0,
 308                                      .buf = msg, .len = len},
 309                                    { .addr = adr, .flags = I2C_M_RD,
 310                                      .buf = answ, .len = alen } };
 311         if (i2c_transfer(adap, msgs, 2) != 2) {
 312                 dev_err(&adap->dev, "i2c read error\n");
 313                 return -EIO;
 314         }
 315         return 0;
 316 }
 317
 318 static int i2c_write(struct i2c_adapter *adap, u8 adr, u8 *data, int len)
 319 {
 320         struct i2c_msg msg = {.addr = adr, .flags = 0,
 321                               .buf = data, .len = len};
 322
 323         if (i2c_transfer(adap, &msg, 1) != 1) {
 324                 dev_err(&adap->dev, "i2c write error\n");
 325                 return -EIO;
 326         }
 327         return 0;
 328 }
 329
 330 static int write_regs(struct stv *state, int reg, int len)
 331 {
 332         u8 d[12];
 333
 334         memcpy(&d[1], &state->reg[reg], len);
 335         d[0] = reg;
 336         return i2c_write(state->i2c, state->adr, d, len + 1);
 337 }
 338
 339 static int write_reg(struct stv *state, u8 reg, u8 val)
 340 {
 341         u8 d[2] = {reg, val};
 342
 343         return i2c_write(state->i2c, state->adr, d, 2);
 344 }
 345
 346 static int read_reg(struct stv *state, u8 reg, u8 *val)
 347 {
 348         return i2c_read(state->i2c, state->adr, &reg, 1, val, 1);
 349 }
 350
 351 static int wait_for_call_done(struct stv *state, u8 mask)
 352 {
 353         int status = 0;
 354         u32 lock_retry_count = 10;
 355
 356         while (lock_retry_count > 0) {
 357                 u8 regval;
 358
 359                 status = read_reg(state, 9, &regval);
 360                 if (status < 0)
 361                         return status;
 362
 363                 if ((regval & mask) == 0)
 364                         break;
 365                 usleep_range(4000, 6000);
 366                 lock_retry_count -= 1;
 367
 368                 status = -EIO;
 369         }
 370         return status;
 371 }
 372
 373 static void init_state(struct stv *state)
 374 {
 375         u32 clkdiv = 0;
 376         u32 agcmode = 0;
 377         u32 agcref = 2;
 378         u32 agcset = 0xffffffff;
 379         u32 bbmode = 0xffffffff;
 380
 381         state->reg[0] = 0x08;
 382         state->reg[1] = 0x41;
 383         state->reg[2] = 0x8f;
 384         state->reg[3] = 0x00;
 385         state->reg[4] = 0xce;
 386         state->reg[5] = 0x54;
 387         state->reg[6] = 0x55;
 388         state->reg[7] = 0x45;
 389         state->reg[8] = 0x46;
 390         state->reg[9] = 0xbd;
 391         state->reg[10] = 0x11;
 392
 393         state->ref_freq = 16000;
 394
 395         if (clkdiv <= 3)
 396                 state->reg[0x00] |= (clkdiv & 0x03);
 397         if (agcmode <= 3) {
 398                 state->reg[0x03] |= (agcmode << 5);
 399                 if (agcmode == 0x01)
 400                         state->reg[0x01] |= 0x30;
 401         }
 402         if (bbmode <= 3)
 403                 state->reg[0x01] = (state->reg[0x01] & ~0x30) | (bbmode << 4);
 404         if (agcref <= 7)
 405                 state->reg[0x03] |= agcref;
 406         if (agcset <= 31)
 407                 state->reg[0x02] = (state->reg[0x02] & ~0x1F) | agcset | 0x40;
 408 }
 409
 410 static int attach_init(struct stv *state)
 411 {
 412         if (write_regs(state, 0, 11))
 413                 return -ENODEV;
 414         return 0;
 415 }
 416
 417 static void release(struct dvb_frontend *fe)
 418 {
 419         kfree(fe->tuner_priv);
 420         fe->tuner_priv = NULL;
 421 }
 422
 423 static int set_bandwidth(struct dvb_frontend *fe, u32 cutoff_frequency)
 424 {
 425         struct stv *state = fe->tuner_priv;
 426         u32 index = (cutoff_frequency + 999999) / 1000000;
 427         int stat = 0;
 428
 429         if (index < 6)
 430                 index = 6;
 431         if (index > 50)
 432                 index = 50;
 433         if ((state->reg[0x08] & ~0xFC) == ((index - 6) << 2))
 434                 return 0;
 435
 436         state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2);
 437         state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x08;
 438         if (fe->ops.i2c_gate_ctrl)
 439                 stat = fe->ops.i2c_gate_ctrl(fe, 1);
 440         if (!stat) {
 441                 write_regs(state, 0x08, 2);
 442                 wait_for_call_done(state, 0x08);
 443         }
 444         if (fe->ops.i2c_gate_ctrl && !stat)
 445                 fe->ops.i2c_gate_ctrl(fe, 0);
 446         return stat;
 447 }
 448
 449 static int set_lof(struct stv *state, u32 local_frequency, u32 cutoff_frequency)
 450 {
 451         u32 index = (cutoff_frequency + 999999) / 1000000;
 452         u32 frequency = (local_frequency + 500) / 1000;
 453         u32 p = 1, psel = 0, fvco, div, frac;
 454         u8 icp, tmp;
 455
 456         if (index < 6)
 457                 index = 6;
 458         if (index > 50)
 459                 index = 50;
 460
 461         if (frequency <= 1300000) {
 462                 p =  4;
 463                 psel = 1;
 464         } else {
 465                 p =  2;
 466                 psel = 0;
 467         }
 468         fvco = frequency * p;
 469         div = fvco / state->ref_freq;
 470         frac = fvco % state->ref_freq;
 471         frac = muldiv32(frac, 0x40000, state->ref_freq);
 472
 473         icp = 0;
 474         if (fvco < 2700000)
 475                 icp = 0;
 476         else if (fvco < 2950000)
 477                 icp = 1;
 478         else if (fvco < 3300000)
 479                 icp = 2;
 480         else if (fvco < 3700000)
 481                 icp = 3;
 482         else if (fvco < 4200000)
 483                 icp = 5;
 484         else if (fvco < 4800000)
 485                 icp = 6;
 486         else
 487                 icp = 7;
 488
 489         state->reg[0x02] |= 0x80; /* LNA IIP3 Mode */
 490
 491         state->reg[0x03] = (state->reg[0x03] & ~0x80) | (psel << 7);
 492         state->reg[0x04] = (div & 0xFF);
 493         state->reg[0x05] = (((div >> 8) & 0x01) | ((frac & 0x7F) << 1)) & 0xff;
 494         state->reg[0x06] = ((frac >> 7) & 0xFF);
 495         state->reg[0x07] = (state->reg[0x07] & ~0x07) | ((frac >> 15) & 0x07);
 496         state->reg[0x07] = (state->reg[0x07] & ~0xE0) | (icp << 5);
 497
 498         state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2);
 499         /* Start cal vco,CF */
 500         state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x0C;
 501         write_regs(state, 2, 8);
 502
 503         wait_for_call_done(state, 0x0C);
 504
 505         usleep_range(10000, 12000);
 506
 507         read_reg(state, 0x03, &tmp);
 508         if (tmp & 0x10) {
 509                 state->reg[0x02] &= ~0x80; /* LNA NF Mode */
 510                 write_regs(state, 2, 1);
 511         }
 512         read_reg(state, 0x08, &tmp);
 513
 514         state->frequency = frequency;
 515
 516         return 0;
 517 }
 518
 519 static int set_params(struct dvb_frontend *fe)
 520 {
 521         struct stv *state = fe->tuner_priv;
 522         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 523         u32 freq, cutoff;
 524         int stat = 0;
 525
 526         if (p->delivery_system != SYS_DVBS && p->delivery_system != SYS_DVBS2)
 527                 return -EINVAL;
 528
 529         freq = p->frequency * 1000;
 530         cutoff = 5000000 + muldiv32(p->symbol_rate, 135, 200);
 531
 532         if (fe->ops.i2c_gate_ctrl)
 533                 stat = fe->ops.i2c_gate_ctrl(fe, 1);
 534         if (!stat)
 535                 set_lof(state, freq, cutoff);
 536         if (fe->ops.i2c_gate_ctrl && !stat)
 537                 fe->ops.i2c_gate_ctrl(fe, 0);
 538         return 0;
 539 }
 540
 541 static s32 table_lookup(const struct slookup *table,
 542                         int table_size, u16 reg_value)
 543 {
 544         s32 gain;
 545         s32 reg_diff;
 546         int imin = 0;
 547         int imax = table_size - 1;
 548         int i;
 549
 550         /* Assumes Table[0].RegValue < Table[imax].RegValue */
 551         if (reg_value <= table[0].reg_value) {
 552                 gain = table[0].value;
 553         } else if (reg_value >= table[imax].reg_value) {
 554                 gain = table[imax].value;
 555         } else {
 556                 while ((imax - imin) > 1) {
 557                         i = (imax + imin) / 2;
 558                         if ((table[imin].reg_value <= reg_value) &&
 559                             (reg_value <= table[i].reg_value))
 560                                 imax = i;
 561                         else
 562                                 imin = i;
 563                 }
 564                 reg_diff = table[imax].reg_value - table[imin].reg_value;
 565                 gain = table[imin].value;
 566                 if (reg_diff != 0)
 567                         gain += ((s32)(reg_value - table[imin].reg_value) *
 568                                 (s32)(table[imax].value
 569                                 - table[imin].value)) / reg_diff;
 570         }
 571         return gain;
 572 }
 573
 574 static int get_rf_strength(struct dvb_frontend *fe, u16 *st)
 575 {
 576         struct stv *state = fe->tuner_priv;
 577         u16 rfagc = *st;
 578         s32 gain;
 579
 580         if ((state->reg[0x03] & 0x60) == 0) {
 581                 /* RF Mode, Read AGC ADC */
 582                 u8 reg = 0;
 583                 int stat = 0;
 584
 585                 if (fe->ops.i2c_gate_ctrl)
 586                         stat = fe->ops.i2c_gate_ctrl(fe, 1);
 587                 if (!stat) {
 588                         write_reg(state, 0x02, state->reg[0x02] | 0x20);
 589                         read_reg(state, 2, &reg);
 590                         if (reg & 0x20)
 591                                 read_reg(state, 2, &reg);
 592                 }
 593                 if (fe->ops.i2c_gate_ctrl && !stat)
 594                         fe->ops.i2c_gate_ctrl(fe, 0);
 595
 596                 if ((state->reg[0x02] & 0x80) == 0)
 597                         /* NF */
 598                         gain = table_lookup(lnagain_nf_lookup,
 599                                             ARRAY_SIZE(lnagain_nf_lookup),
 600                                             reg & 0x1F);
 601                 else
 602                         /* IIP3 */
 603                         gain = table_lookup(lnagain_iip3_lookup,
 604                                             ARRAY_SIZE(lnagain_iip3_lookup),
 605                                             reg & 0x1F);
 606
 607                 gain += table_lookup(gain_rfagc_lookup,
 608                                      ARRAY_SIZE(gain_rfagc_lookup), rfagc);
 609
 610                 gain -= 2400;
 611         } else {
 612                 /* Channel Mode */
 613                 if ((state->reg[0x02] & 0x80) == 0) {
 614                         /* NF */
 615                         gain = table_lookup(
 616                                 gain_channel_agc_nf_lookup,
 617                                 ARRAY_SIZE(gain_channel_agc_nf_lookup), rfagc);
 618
 619                         gain += 600;
 620                 } else {
 621                         /* IIP3 */
 622                         gain = table_lookup(
 623                                 gain_channel_agc_iip3_lookup,
 624                                 ARRAY_SIZE(gain_channel_agc_iip3_lookup),
 625                                 rfagc);
 626                 }
 627         }
 628
 629         if (state->frequency > 0)
 630                 /* Tilt correction ( 0.00016 dB/MHz ) */
 631                 gain -= ((((s32)(state->frequency / 1000) - 1550) * 2) / 12);
 632
 633         /* + (BBGain * 10); */
 634         gain +=  (s32)((state->reg[0x01] & 0xC0) >> 6) * 600 - 1300;
 635
 636         if (gain < 0)
 637                 gain = 0;
 638         else if (gain > 10000)
 639                 gain = 10000;
 640
 641         *st = 10000 - gain;
 642
 643         return 0;
 644 }
 645
 646 static const struct dvb_tuner_ops tuner_ops = {
 647         .info = {
 648                 .name           = "ST STV6111",
 649                 .frequency_min_hz =  950 * MHz,
 650                 .frequency_max_hz = 2150 * MHz,
 651         },
 652         .set_params             = set_params,
 653         .release                = release,
 654         .get_rf_strength        = get_rf_strength,
 655         .set_bandwidth          = set_bandwidth,
 656 };
 657
 658 struct dvb_frontend *stv6111_attach(struct dvb_frontend *fe,
 659                                     struct i2c_adapter *i2c, u8 adr)
 660 {
 661         struct stv *state;
 662         int stat = -ENODEV;
 663         int gatestat = 0;
 664
 665         state = kzalloc(sizeof(*state), GFP_KERNEL);
 666         if (!state)
 667                 return NULL;
 668         state->adr = adr;
 669         state->i2c = i2c;
 670         memcpy(&fe->ops.tuner_ops, &tuner_ops, sizeof(struct dvb_tuner_ops));
 671         init_state(state);
 672
 673         if (fe->ops.i2c_gate_ctrl)
 674                 gatestat = fe->ops.i2c_gate_ctrl(fe, 1);
 675         if (!gatestat)
 676                 stat = attach_init(state);
 677         if (fe->ops.i2c_gate_ctrl && !gatestat)
 678                 fe->ops.i2c_gate_ctrl(fe, 0);
 679         if (stat < 0) {
 680                 kfree(state);
 681                 return NULL;
 682         }
 683         fe->tuner_priv = state;
 684         return fe;
 685 }
 686 EXPORT_SYMBOL_GPL(stv6111_attach);
 687
 688 MODULE_DESCRIPTION("ST STV6111 satellite tuner driver");
 689 MODULE_AUTHOR("Ralph Metzler, Manfred Voelkel");
 690 MODULE_LICENSE("GPL v2");