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