drivers/media/dvb-frontends/stv0299.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3     Driver for ST STV0299 demodulator
   4
   5     Copyright (C) 2001-2002 Convergence Integrated Media GmbH
   6         <ralph@convergence.de>,
   7         <holger@convergence.de>,
   8         <js@convergence.de>
   9
  10
  11     Philips SU1278/SH
  12
  13     Copyright (C) 2002 by Peter Schildmann <peter.schildmann@web.de>
  14
  15
  16     LG TDQF-S001F
  17
  18     Copyright (C) 2002 Felix Domke <tmbinc@elitedvb.net>
  19                      & Andreas Oberritter <obi@linuxtv.org>
  20
  21
  22     Support for Samsung TBMU24112IMB used on Technisat SkyStar2 rev. 2.6B
  23
  24     Copyright (C) 2003 Vadim Catana <skystar@moldova.cc>:
  25
  26     Support for Philips SU1278 on Technotrend hardware
  27
  28     Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>
  29
  30
  31 */
  32
  33 #include <linux/init.h>
  34 #include <linux/kernel.h>
  35 #include <linux/ktime.h>
  36 #include <linux/module.h>
  37 #include <linux/string.h>
  38 #include <linux/slab.h>
  39 #include <linux/jiffies.h>
  40 #include <asm/div64.h>
  41
  42 #include <media/dvb_frontend.h>
  43 #include "stv0299.h"
  44
  45 struct stv0299_state {
  46         struct i2c_adapter* i2c;
  47         const struct stv0299_config* config;
  48         struct dvb_frontend frontend;
  49
  50         u8 initialised:1;
  51         u32 tuner_frequency;
  52         u32 symbol_rate;
  53         enum fe_code_rate fec_inner;
  54         int errmode;
  55         u32 ucblocks;
  56         u8 mcr_reg;
  57 };
  58
  59 #define STATUS_BER 0
  60 #define STATUS_UCBLOCKS 1
  61
  62 static int debug;
  63 static int debug_legacy_dish_switch;
  64 #define dprintk(args...) \
  65         do { \
  66                 if (debug) printk(KERN_DEBUG "stv0299: " args); \
  67         } while (0)
  68
  69
  70 static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
  71 {
  72         int ret;
  73         u8 buf [] = { reg, data };
  74         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
  75
  76         ret = i2c_transfer (state->i2c, &msg, 1);
  77
  78         if (ret != 1)
  79                 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
  80                         __func__, reg, data, ret);
  81
  82         return (ret != 1) ? -EREMOTEIO : 0;
  83 }
  84
  85 static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)
  86 {
  87         struct stv0299_state* state = fe->demodulator_priv;
  88
  89         if (len != 2)
  90                 return -EINVAL;
  91
  92         return stv0299_writeregI(state, buf[0], buf[1]);
  93 }
  94
  95 static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
  96 {
  97         int ret;
  98         u8 b0 [] = { reg };
  99         u8 b1 [] = { 0 };
 100         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
 101                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 102
 103         ret = i2c_transfer (state->i2c, msg, 2);
 104
 105         if (ret != 2)
 106                 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
 107                                 __func__, reg, ret);
 108
 109         return b1[0];
 110 }
 111
 112 static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
 113 {
 114         int ret;
 115         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
 116                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
 117
 118         ret = i2c_transfer (state->i2c, msg, 2);
 119
 120         if (ret != 2)
 121                 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
 122
 123         return ret == 2 ? 0 : ret;
 124 }
 125
 126 static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec)
 127 {
 128         dprintk ("%s\n", __func__);
 129
 130         switch (fec) {
 131         case FEC_AUTO:
 132         {
 133                 return stv0299_writeregI (state, 0x31, 0x1f);
 134         }
 135         case FEC_1_2:
 136         {
 137                 return stv0299_writeregI (state, 0x31, 0x01);
 138         }
 139         case FEC_2_3:
 140         {
 141                 return stv0299_writeregI (state, 0x31, 0x02);
 142         }
 143         case FEC_3_4:
 144         {
 145                 return stv0299_writeregI (state, 0x31, 0x04);
 146         }
 147         case FEC_5_6:
 148         {
 149                 return stv0299_writeregI (state, 0x31, 0x08);
 150         }
 151         case FEC_7_8:
 152         {
 153                 return stv0299_writeregI (state, 0x31, 0x10);
 154         }
 155         default:
 156         {
 157                 return -EINVAL;
 158         }
 159     }
 160 }
 161
 162 static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state)
 163 {
 164         static const enum fe_code_rate fec_tab[] = {
 165                 FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_1_2
 166         };
 167         u8 index;
 168
 169         dprintk ("%s\n", __func__);
 170
 171         index = stv0299_readreg (state, 0x1b);
 172         index &= 0x7;
 173
 174         if (index > 4)
 175                 return FEC_AUTO;
 176
 177         return fec_tab [index];
 178 }
 179
 180 static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
 181 {
 182         unsigned long start = jiffies;
 183
 184         dprintk ("%s\n", __func__);
 185
 186         while (stv0299_readreg(state, 0x0a) & 1) {
 187                 if (time_is_before_jiffies(start + timeout)) {
 188                         dprintk ("%s: timeout!!\n", __func__);
 189                         return -ETIMEDOUT;
 190                 }
 191                 msleep(10);
 192         }
 193
 194         return 0;
 195 }
 196
 197 static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
 198 {
 199         unsigned long start = jiffies;
 200
 201         dprintk ("%s\n", __func__);
 202
 203         while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
 204                 if (time_is_before_jiffies(start + timeout)) {
 205                         dprintk ("%s: timeout!!\n", __func__);
 206                         return -ETIMEDOUT;
 207                 }
 208                 msleep(10);
 209         }
 210
 211         return 0;
 212 }
 213
 214 static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
 215 {
 216         struct stv0299_state* state = fe->demodulator_priv;
 217         u64 big = srate;
 218         u32 ratio;
 219
 220         // check rate is within limits
 221         if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
 222
 223         // calculate value to program
 224         big = big << 20;
 225         big += (state->config->mclk-1); // round correctly
 226         do_div(big, state->config->mclk);
 227         ratio = big << 4;
 228
 229         return state->config->set_symbol_rate(fe, srate, ratio);
 230 }
 231
 232 static int stv0299_get_symbolrate (struct stv0299_state* state)
 233 {
 234         u32 Mclk = state->config->mclk / 4096L;
 235         u32 srate;
 236         s32 offset;
 237         u8 sfr[3];
 238         s8 rtf;
 239
 240         dprintk ("%s\n", __func__);
 241
 242         stv0299_readregs (state, 0x1f, sfr, 3);
 243         stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
 244
 245         srate = (sfr[0] << 8) | sfr[1];
 246         srate *= Mclk;
 247         srate /= 16;
 248         srate += (sfr[2] >> 4) * Mclk / 256;
 249         offset = (s32) rtf * (srate / 4096L);
 250         offset /= 128;
 251
 252         dprintk ("%s : srate = %i\n", __func__, srate);
 253         dprintk ("%s : ofset = %i\n", __func__, offset);
 254
 255         srate += offset;
 256
 257         srate += 1000;
 258         srate /= 2000;
 259         srate *= 2000;
 260
 261         return srate;
 262 }
 263
 264 static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
 265                                     struct dvb_diseqc_master_cmd *m)
 266 {
 267         struct stv0299_state* state = fe->demodulator_priv;
 268         u8 val;
 269         int i;
 270
 271         dprintk ("%s\n", __func__);
 272
 273         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 274                 return -ETIMEDOUT;
 275
 276         val = stv0299_readreg (state, 0x08);
 277
 278         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))  /* DiSEqC mode */
 279                 return -EREMOTEIO;
 280
 281         for (i=0; i<m->msg_len; i++) {
 282                 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
 283                         return -ETIMEDOUT;
 284
 285                 if (stv0299_writeregI (state, 0x09, m->msg[i]))
 286                         return -EREMOTEIO;
 287         }
 288
 289         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 290                 return -ETIMEDOUT;
 291
 292         return 0;
 293 }
 294
 295 static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,
 296                                      enum fe_sec_mini_cmd burst)
 297 {
 298         struct stv0299_state* state = fe->demodulator_priv;
 299         u8 val;
 300
 301         dprintk ("%s\n", __func__);
 302
 303         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 304                 return -ETIMEDOUT;
 305
 306         val = stv0299_readreg (state, 0x08);
 307
 308         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))        /* burst mode */
 309                 return -EREMOTEIO;
 310
 311         if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
 312                 return -EREMOTEIO;
 313
 314         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 315                 return -ETIMEDOUT;
 316
 317         if (stv0299_writeregI (state, 0x08, val))
 318                 return -EREMOTEIO;
 319
 320         return 0;
 321 }
 322
 323 static int stv0299_set_tone(struct dvb_frontend *fe,
 324                             enum fe_sec_tone_mode tone)
 325 {
 326         struct stv0299_state* state = fe->demodulator_priv;
 327         u8 val;
 328
 329         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 330                 return -ETIMEDOUT;
 331
 332         val = stv0299_readreg (state, 0x08);
 333
 334         switch (tone) {
 335         case SEC_TONE_ON:
 336                 return stv0299_writeregI (state, 0x08, val | 0x3);
 337
 338         case SEC_TONE_OFF:
 339                 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
 340
 341         default:
 342                 return -EINVAL;
 343         }
 344 }
 345
 346 static int stv0299_set_voltage(struct dvb_frontend *fe,
 347                                enum fe_sec_voltage voltage)
 348 {
 349         struct stv0299_state* state = fe->demodulator_priv;
 350         u8 reg0x08;
 351         u8 reg0x0c;
 352
 353         dprintk("%s: %s\n", __func__,
 354                 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
 355                 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
 356
 357         reg0x08 = stv0299_readreg (state, 0x08);
 358         reg0x0c = stv0299_readreg (state, 0x0c);
 359
 360         /*
 361          *  H/V switching over OP0, OP1 and OP2 are LNB power enable bits
 362          */
 363         reg0x0c &= 0x0f;
 364         reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
 365
 366         switch (voltage) {
 367         case SEC_VOLTAGE_13:
 368                 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 369                         reg0x0c |= 0x10; /* OP1 off, OP0 on */
 370                 else
 371                         reg0x0c |= 0x40; /* OP1 on, OP0 off */
 372                 break;
 373         case SEC_VOLTAGE_18:
 374                 reg0x0c |= 0x50; /* OP1 on, OP0 on */
 375                 break;
 376         case SEC_VOLTAGE_OFF:
 377                 /* LNB power off! */
 378                 reg0x08 = 0x00;
 379                 reg0x0c = 0x00;
 380                 break;
 381         default:
 382                 return -EINVAL;
 383         }
 384
 385         if (state->config->op0_off)
 386                 reg0x0c &= ~0x10;
 387
 388         stv0299_writeregI(state, 0x08, reg0x08);
 389         return stv0299_writeregI(state, 0x0c, reg0x0c);
 390 }
 391
 392 static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
 393 {
 394         struct stv0299_state* state = fe->demodulator_priv;
 395         u8 reg0x08;
 396         u8 reg0x0c;
 397         u8 lv_mask = 0x40;
 398         u8 last = 1;
 399         int i;
 400         ktime_t nexttime;
 401         ktime_t tv[10];
 402
 403         reg0x08 = stv0299_readreg (state, 0x08);
 404         reg0x0c = stv0299_readreg (state, 0x0c);
 405         reg0x0c &= 0x0f;
 406         stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
 407         if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 408                 lv_mask = 0x10;
 409
 410         cmd = cmd << 1;
 411         if (debug_legacy_dish_switch)
 412                 printk ("%s switch command: 0x%04lx\n",__func__, cmd);
 413
 414         nexttime = ktime_get_boottime();
 415         if (debug_legacy_dish_switch)
 416                 tv[0] = nexttime;
 417         stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
 418
 419         dvb_frontend_sleep_until(&nexttime, 32000);
 420
 421         for (i=0; i<9; i++) {
 422                 if (debug_legacy_dish_switch)
 423                         tv[i+1] = ktime_get_boottime();
 424                 if((cmd & 0x01) != last) {
 425                         /* set voltage to (last ? 13V : 18V) */
 426                         stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
 427                         last = (last) ? 0 : 1;
 428                 }
 429
 430                 cmd = cmd >> 1;
 431
 432                 if (i != 8)
 433                         dvb_frontend_sleep_until(&nexttime, 8000);
 434         }
 435         if (debug_legacy_dish_switch) {
 436                 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
 437                         __func__, fe->dvb->num);
 438                 for (i = 1; i < 10; i++)
 439                         printk("%d: %d\n", i,
 440                                (int) ktime_us_delta(tv[i], tv[i-1]));
 441         }
 442
 443         return 0;
 444 }
 445
 446 static int stv0299_init (struct dvb_frontend* fe)
 447 {
 448         struct stv0299_state* state = fe->demodulator_priv;
 449         int i;
 450         u8 reg;
 451         u8 val;
 452
 453         dprintk("stv0299: init chip\n");
 454
 455         stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
 456         msleep(50);
 457
 458         for (i = 0; ; i += 2)  {
 459                 reg = state->config->inittab[i];
 460                 val = state->config->inittab[i+1];
 461                 if (reg == 0xff && val == 0xff)
 462                         break;
 463                 if (reg == 0x0c && state->config->op0_off)
 464                         val &= ~0x10;
 465                 if (reg == 0x2)
 466                         state->mcr_reg = val & 0xf;
 467                 stv0299_writeregI(state, reg, val);
 468         }
 469
 470         return 0;
 471 }
 472
 473 static int stv0299_read_status(struct dvb_frontend *fe,
 474                                enum fe_status *status)
 475 {
 476         struct stv0299_state* state = fe->demodulator_priv;
 477
 478         u8 signal = 0xff - stv0299_readreg (state, 0x18);
 479         u8 sync = stv0299_readreg (state, 0x1b);
 480
 481         dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
 482         *status = 0;
 483
 484         if (signal > 10)
 485                 *status |= FE_HAS_SIGNAL;
 486
 487         if (sync & 0x80)
 488                 *status |= FE_HAS_CARRIER;
 489
 490         if (sync & 0x10)
 491                 *status |= FE_HAS_VITERBI;
 492
 493         if (sync & 0x08)
 494                 *status |= FE_HAS_SYNC;
 495
 496         if ((sync & 0x98) == 0x98)
 497                 *status |= FE_HAS_LOCK;
 498
 499         return 0;
 500 }
 501
 502 static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
 503 {
 504         struct stv0299_state* state = fe->demodulator_priv;
 505
 506         if (state->errmode != STATUS_BER)
 507                 return -ENOSYS;
 508
 509         *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
 510
 511         return 0;
 512 }
 513
 514 static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 515 {
 516         struct stv0299_state* state = fe->demodulator_priv;
 517
 518         s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
 519                                | stv0299_readreg (state, 0x19));
 520
 521         dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
 522                  stv0299_readreg (state, 0x18),
 523                  stv0299_readreg (state, 0x19), (int) signal);
 524
 525         signal = signal * 5 / 4;
 526         *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
 527
 528         return 0;
 529 }
 530
 531 static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
 532 {
 533         struct stv0299_state* state = fe->demodulator_priv;
 534
 535         s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
 536                            | stv0299_readreg (state, 0x25));
 537         xsnr = 3 * (xsnr - 0xa100);
 538         *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
 539
 540         return 0;
 541 }
 542
 543 static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 544 {
 545         struct stv0299_state* state = fe->demodulator_priv;
 546
 547         if (state->errmode != STATUS_UCBLOCKS)
 548                 return -ENOSYS;
 549
 550         state->ucblocks += stv0299_readreg(state, 0x1e);
 551         state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
 552         *ucblocks = state->ucblocks;
 553
 554         return 0;
 555 }
 556
 557 static int stv0299_set_frontend(struct dvb_frontend *fe)
 558 {
 559         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 560         struct stv0299_state* state = fe->demodulator_priv;
 561         int invval = 0;
 562
 563         dprintk ("%s : FE_SET_FRONTEND\n", __func__);
 564         if (state->config->set_ts_params)
 565                 state->config->set_ts_params(fe, 0);
 566
 567         // set the inversion
 568         if (p->inversion == INVERSION_OFF) invval = 0;
 569         else if (p->inversion == INVERSION_ON) invval = 1;
 570         else {
 571                 printk("stv0299 does not support auto-inversion\n");
 572                 return -EINVAL;
 573         }
 574         if (state->config->invert) invval = (~invval) & 1;
 575         stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
 576
 577         if (fe->ops.tuner_ops.set_params) {
 578                 fe->ops.tuner_ops.set_params(fe);
 579                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 580         }
 581
 582         stv0299_set_FEC(state, p->fec_inner);
 583         stv0299_set_symbolrate(fe, p->symbol_rate);
 584         stv0299_writeregI(state, 0x22, 0x00);
 585         stv0299_writeregI(state, 0x23, 0x00);
 586
 587         state->tuner_frequency = p->frequency;
 588         state->fec_inner = p->fec_inner;
 589         state->symbol_rate = p->symbol_rate;
 590
 591         return 0;
 592 }
 593
 594 static int stv0299_get_frontend(struct dvb_frontend *fe,
 595                                 struct dtv_frontend_properties *p)
 596 {
 597         struct stv0299_state* state = fe->demodulator_priv;
 598         s32 derot_freq;
 599         int invval;
 600
 601         derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
 602                                 | stv0299_readreg (state, 0x23));
 603
 604         derot_freq *= (state->config->mclk >> 16);
 605         derot_freq += 500;
 606         derot_freq /= 1000;
 607
 608         p->frequency += derot_freq;
 609
 610         invval = stv0299_readreg (state, 0x0c) & 1;
 611         if (state->config->invert) invval = (~invval) & 1;
 612         p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
 613
 614         p->fec_inner = stv0299_get_fec(state);
 615         p->symbol_rate = stv0299_get_symbolrate(state);
 616
 617         return 0;
 618 }
 619
 620 static int stv0299_sleep(struct dvb_frontend* fe)
 621 {
 622         struct stv0299_state* state = fe->demodulator_priv;
 623
 624         stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
 625         state->initialised = 0;
 626
 627         return 0;
 628 }
 629
 630 static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 631 {
 632         struct stv0299_state* state = fe->demodulator_priv;
 633
 634         if (enable) {
 635                 stv0299_writeregI(state, 0x05, 0xb5);
 636         } else {
 637                 stv0299_writeregI(state, 0x05, 0x35);
 638         }
 639         udelay(1);
 640         return 0;
 641 }
 642
 643 static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 644 {
 645         struct stv0299_state* state = fe->demodulator_priv;
 646         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 647
 648         fesettings->min_delay_ms = state->config->min_delay_ms;
 649         if (p->symbol_rate < 10000000) {
 650                 fesettings->step_size = p->symbol_rate / 32000;
 651                 fesettings->max_drift = 5000;
 652         } else {
 653                 fesettings->step_size = p->symbol_rate / 16000;
 654                 fesettings->max_drift = p->symbol_rate / 2000;
 655         }
 656         return 0;
 657 }
 658
 659 static void stv0299_release(struct dvb_frontend* fe)
 660 {
 661         struct stv0299_state* state = fe->demodulator_priv;
 662         kfree(state);
 663 }
 664
 665 static const struct dvb_frontend_ops stv0299_ops;
 666
 667 struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
 668                                     struct i2c_adapter* i2c)
 669 {
 670         struct stv0299_state* state = NULL;
 671         int id;
 672
 673         /* allocate memory for the internal state */
 674         state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
 675         if (state == NULL) goto error;
 676
 677         /* setup the state */
 678         state->config = config;
 679         state->i2c = i2c;
 680         state->initialised = 0;
 681         state->tuner_frequency = 0;
 682         state->symbol_rate = 0;
 683         state->fec_inner = 0;
 684         state->errmode = STATUS_BER;
 685
 686         /* check if the demod is there */
 687         stv0299_writeregI(state, 0x02, 0x30); /* standby off */
 688         msleep(200);
 689         id = stv0299_readreg(state, 0x00);
 690
 691         /* register 0x00 contains 0xa1 for STV0299 and STV0299B */
 692         /* register 0x00 might contain 0x80 when returning from standby */
 693         if (id != 0xa1 && id != 0x80) goto error;
 694
 695         /* create dvb_frontend */
 696         memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
 697         state->frontend.demodulator_priv = state;
 698         return &state->frontend;
 699
 700 error:
 701         kfree(state);
 702         return NULL;
 703 }
 704
 705 static const struct dvb_frontend_ops stv0299_ops = {
 706         .delsys = { SYS_DVBS },
 707         .info = {
 708                 .name                   = "ST STV0299 DVB-S",
 709                 .frequency_min_hz       =  950 * MHz,
 710                 .frequency_max_hz       = 2150 * MHz,
 711                 .frequency_stepsize_hz  =  125 * kHz,
 712                 .symbol_rate_min        = 1000000,
 713                 .symbol_rate_max        = 45000000,
 714                 .symbol_rate_tolerance  = 500,  /* ppm */
 715                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 716                       FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 717                       FE_CAN_QPSK |
 718                       FE_CAN_FEC_AUTO
 719         },
 720
 721         .release = stv0299_release,
 722
 723         .init = stv0299_init,
 724         .sleep = stv0299_sleep,
 725         .write = stv0299_write,
 726         .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
 727
 728         .set_frontend = stv0299_set_frontend,
 729         .get_frontend = stv0299_get_frontend,
 730         .get_tune_settings = stv0299_get_tune_settings,
 731
 732         .read_status = stv0299_read_status,
 733         .read_ber = stv0299_read_ber,
 734         .read_signal_strength = stv0299_read_signal_strength,
 735         .read_snr = stv0299_read_snr,
 736         .read_ucblocks = stv0299_read_ucblocks,
 737
 738         .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
 739         .diseqc_send_burst = stv0299_send_diseqc_burst,
 740         .set_tone = stv0299_set_tone,
 741         .set_voltage = stv0299_set_voltage,
 742         .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
 743 };
 744
 745 module_param(debug_legacy_dish_switch, int, 0444);
 746 MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
 747
 748 module_param(debug, int, 0644);
 749 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 750
 751 MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
 752 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
 753 MODULE_LICENSE("GPL");
 754
 755 EXPORT_SYMBOL_GPL(stv0299_attach);