drivers/media/dvb-frontends/stv0299.c

   1 /*
   2     Driver for ST STV0299 demodulator
   3
   4     Copyright (C) 2001-2002 Convergence Integrated Media GmbH
   5         <ralph@convergence.de>,
   6         <holger@convergence.de>,
   7         <js@convergence.de>
   8
   9
  10     Philips SU1278/SH
  11
  12     Copyright (C) 2002 by Peter Schildmann <peter.schildmann@web.de>
  13
  14
  15     LG TDQF-S001F
  16
  17     Copyright (C) 2002 Felix Domke <tmbinc@elitedvb.net>
  18                      & Andreas Oberritter <obi@linuxtv.org>
  19
  20
  21     Support for Samsung TBMU24112IMB used on Technisat SkyStar2 rev. 2.6B
  22
  23     Copyright (C) 2003 Vadim Catana <skystar@moldova.cc>:
  24
  25     Support for Philips SU1278 on Technotrend hardware
  26
  27     Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>
  28
  29     This program is free software; you can redistribute it and/or modify
  30     it under the terms of the GNU General Public License as published by
  31     the Free Software Foundation; either version 2 of the License, or
  32     (at your option) any later version.
  33
  34     This program is distributed in the hope that it will be useful,
  35     but WITHOUT ANY WARRANTY; without even the implied warranty of
  36     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  37     GNU General Public License for more details.
  38
  39     You should have received a copy of the GNU General Public License
  40     along with this program; if not, write to the Free Software
  41     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  42
  43 */
  44
  45 #include <linux/init.h>
  46 #include <linux/kernel.h>
  47 #include <linux/ktime.h>
  48 #include <linux/module.h>
  49 #include <linux/string.h>
  50 #include <linux/slab.h>
  51 #include <linux/jiffies.h>
  52 #include <asm/div64.h>
  53
  54 #include <media/dvb_frontend.h>
  55 #include "stv0299.h"
  56
  57 struct stv0299_state {
  58         struct i2c_adapter* i2c;
  59         const struct stv0299_config* config;
  60         struct dvb_frontend frontend;
  61
  62         u8 initialised:1;
  63         u32 tuner_frequency;
  64         u32 symbol_rate;
  65         enum fe_code_rate fec_inner;
  66         int errmode;
  67         u32 ucblocks;
  68         u8 mcr_reg;
  69 };
  70
  71 #define STATUS_BER 0
  72 #define STATUS_UCBLOCKS 1
  73
  74 static int debug;
  75 static int debug_legacy_dish_switch;
  76 #define dprintk(args...) \
  77         do { \
  78                 if (debug) printk(KERN_DEBUG "stv0299: " args); \
  79         } while (0)
  80
  81
  82 static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
  83 {
  84         int ret;
  85         u8 buf [] = { reg, data };
  86         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
  87
  88         ret = i2c_transfer (state->i2c, &msg, 1);
  89
  90         if (ret != 1)
  91                 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
  92                         __func__, reg, data, ret);
  93
  94         return (ret != 1) ? -EREMOTEIO : 0;
  95 }
  96
  97 static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)
  98 {
  99         struct stv0299_state* state = fe->demodulator_priv;
 100
 101         if (len != 2)
 102                 return -EINVAL;
 103
 104         return stv0299_writeregI(state, buf[0], buf[1]);
 105 }
 106
 107 static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
 108 {
 109         int ret;
 110         u8 b0 [] = { reg };
 111         u8 b1 [] = { 0 };
 112         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
 113                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 114
 115         ret = i2c_transfer (state->i2c, msg, 2);
 116
 117         if (ret != 2)
 118                 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
 119                                 __func__, reg, ret);
 120
 121         return b1[0];
 122 }
 123
 124 static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
 125 {
 126         int ret;
 127         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
 128                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
 129
 130         ret = i2c_transfer (state->i2c, msg, 2);
 131
 132         if (ret != 2)
 133                 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);
 134
 135         return ret == 2 ? 0 : ret;
 136 }
 137
 138 static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec)
 139 {
 140         dprintk ("%s\n", __func__);
 141
 142         switch (fec) {
 143         case FEC_AUTO:
 144         {
 145                 return stv0299_writeregI (state, 0x31, 0x1f);
 146         }
 147         case FEC_1_2:
 148         {
 149                 return stv0299_writeregI (state, 0x31, 0x01);
 150         }
 151         case FEC_2_3:
 152         {
 153                 return stv0299_writeregI (state, 0x31, 0x02);
 154         }
 155         case FEC_3_4:
 156         {
 157                 return stv0299_writeregI (state, 0x31, 0x04);
 158         }
 159         case FEC_5_6:
 160         {
 161                 return stv0299_writeregI (state, 0x31, 0x08);
 162         }
 163         case FEC_7_8:
 164         {
 165                 return stv0299_writeregI (state, 0x31, 0x10);
 166         }
 167         default:
 168         {
 169                 return -EINVAL;
 170         }
 171     }
 172 }
 173
 174 static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state)
 175 {
 176         static enum fe_code_rate fec_tab[] = { FEC_2_3, FEC_3_4, FEC_5_6,
 177                                                FEC_7_8, FEC_1_2 };
 178         u8 index;
 179
 180         dprintk ("%s\n", __func__);
 181
 182         index = stv0299_readreg (state, 0x1b);
 183         index &= 0x7;
 184
 185         if (index > 4)
 186                 return FEC_AUTO;
 187
 188         return fec_tab [index];
 189 }
 190
 191 static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
 192 {
 193         unsigned long start = jiffies;
 194
 195         dprintk ("%s\n", __func__);
 196
 197         while (stv0299_readreg(state, 0x0a) & 1) {
 198                 if (jiffies - start > timeout) {
 199                         dprintk ("%s: timeout!!\n", __func__);
 200                         return -ETIMEDOUT;
 201                 }
 202                 msleep(10);
 203         }
 204
 205         return 0;
 206 }
 207
 208 static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
 209 {
 210         unsigned long start = jiffies;
 211
 212         dprintk ("%s\n", __func__);
 213
 214         while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
 215                 if (jiffies - start > timeout) {
 216                         dprintk ("%s: timeout!!\n", __func__);
 217                         return -ETIMEDOUT;
 218                 }
 219                 msleep(10);
 220         }
 221
 222         return 0;
 223 }
 224
 225 static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
 226 {
 227         struct stv0299_state* state = fe->demodulator_priv;
 228         u64 big = srate;
 229         u32 ratio;
 230
 231         // check rate is within limits
 232         if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
 233
 234         // calculate value to program
 235         big = big << 20;
 236         big += (state->config->mclk-1); // round correctly
 237         do_div(big, state->config->mclk);
 238         ratio = big << 4;
 239
 240         return state->config->set_symbol_rate(fe, srate, ratio);
 241 }
 242
 243 static int stv0299_get_symbolrate (struct stv0299_state* state)
 244 {
 245         u32 Mclk = state->config->mclk / 4096L;
 246         u32 srate;
 247         s32 offset;
 248         u8 sfr[3];
 249         s8 rtf;
 250
 251         dprintk ("%s\n", __func__);
 252
 253         stv0299_readregs (state, 0x1f, sfr, 3);
 254         stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);
 255
 256         srate = (sfr[0] << 8) | sfr[1];
 257         srate *= Mclk;
 258         srate /= 16;
 259         srate += (sfr[2] >> 4) * Mclk / 256;
 260         offset = (s32) rtf * (srate / 4096L);
 261         offset /= 128;
 262
 263         dprintk ("%s : srate = %i\n", __func__, srate);
 264         dprintk ("%s : ofset = %i\n", __func__, offset);
 265
 266         srate += offset;
 267
 268         srate += 1000;
 269         srate /= 2000;
 270         srate *= 2000;
 271
 272         return srate;
 273 }
 274
 275 static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
 276                                     struct dvb_diseqc_master_cmd *m)
 277 {
 278         struct stv0299_state* state = fe->demodulator_priv;
 279         u8 val;
 280         int i;
 281
 282         dprintk ("%s\n", __func__);
 283
 284         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 285                 return -ETIMEDOUT;
 286
 287         val = stv0299_readreg (state, 0x08);
 288
 289         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))  /* DiSEqC mode */
 290                 return -EREMOTEIO;
 291
 292         for (i=0; i<m->msg_len; i++) {
 293                 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
 294                         return -ETIMEDOUT;
 295
 296                 if (stv0299_writeregI (state, 0x09, m->msg[i]))
 297                         return -EREMOTEIO;
 298         }
 299
 300         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 301                 return -ETIMEDOUT;
 302
 303         return 0;
 304 }
 305
 306 static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,
 307                                      enum fe_sec_mini_cmd burst)
 308 {
 309         struct stv0299_state* state = fe->demodulator_priv;
 310         u8 val;
 311
 312         dprintk ("%s\n", __func__);
 313
 314         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 315                 return -ETIMEDOUT;
 316
 317         val = stv0299_readreg (state, 0x08);
 318
 319         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))        /* burst mode */
 320                 return -EREMOTEIO;
 321
 322         if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
 323                 return -EREMOTEIO;
 324
 325         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 326                 return -ETIMEDOUT;
 327
 328         if (stv0299_writeregI (state, 0x08, val))
 329                 return -EREMOTEIO;
 330
 331         return 0;
 332 }
 333
 334 static int stv0299_set_tone(struct dvb_frontend *fe,
 335                             enum fe_sec_tone_mode tone)
 336 {
 337         struct stv0299_state* state = fe->demodulator_priv;
 338         u8 val;
 339
 340         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 341                 return -ETIMEDOUT;
 342
 343         val = stv0299_readreg (state, 0x08);
 344
 345         switch (tone) {
 346         case SEC_TONE_ON:
 347                 return stv0299_writeregI (state, 0x08, val | 0x3);
 348
 349         case SEC_TONE_OFF:
 350                 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
 351
 352         default:
 353                 return -EINVAL;
 354         }
 355 }
 356
 357 static int stv0299_set_voltage(struct dvb_frontend *fe,
 358                                enum fe_sec_voltage voltage)
 359 {
 360         struct stv0299_state* state = fe->demodulator_priv;
 361         u8 reg0x08;
 362         u8 reg0x0c;
 363
 364         dprintk("%s: %s\n", __func__,
 365                 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
 366                 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
 367
 368         reg0x08 = stv0299_readreg (state, 0x08);
 369         reg0x0c = stv0299_readreg (state, 0x0c);
 370
 371         /*
 372          *  H/V switching over OP0, OP1 and OP2 are LNB power enable bits
 373          */
 374         reg0x0c &= 0x0f;
 375         reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);
 376
 377         switch (voltage) {
 378         case SEC_VOLTAGE_13:
 379                 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 380                         reg0x0c |= 0x10; /* OP1 off, OP0 on */
 381                 else
 382                         reg0x0c |= 0x40; /* OP1 on, OP0 off */
 383                 break;
 384         case SEC_VOLTAGE_18:
 385                 reg0x0c |= 0x50; /* OP1 on, OP0 on */
 386                 break;
 387         case SEC_VOLTAGE_OFF:
 388                 /* LNB power off! */
 389                 reg0x08 = 0x00;
 390                 reg0x0c = 0x00;
 391                 break;
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         if (state->config->op0_off)
 397                 reg0x0c &= ~0x10;
 398
 399         stv0299_writeregI(state, 0x08, reg0x08);
 400         return stv0299_writeregI(state, 0x0c, reg0x0c);
 401 }
 402
 403 static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
 404 {
 405         struct stv0299_state* state = fe->demodulator_priv;
 406         u8 reg0x08;
 407         u8 reg0x0c;
 408         u8 lv_mask = 0x40;
 409         u8 last = 1;
 410         int i;
 411         ktime_t nexttime;
 412         ktime_t tv[10];
 413
 414         reg0x08 = stv0299_readreg (state, 0x08);
 415         reg0x0c = stv0299_readreg (state, 0x0c);
 416         reg0x0c &= 0x0f;
 417         stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
 418         if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 419                 lv_mask = 0x10;
 420
 421         cmd = cmd << 1;
 422         if (debug_legacy_dish_switch)
 423                 printk ("%s switch command: 0x%04lx\n",__func__, cmd);
 424
 425         nexttime = ktime_get_boottime();
 426         if (debug_legacy_dish_switch)
 427                 tv[0] = nexttime;
 428         stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
 429
 430         dvb_frontend_sleep_until(&nexttime, 32000);
 431
 432         for (i=0; i<9; i++) {
 433                 if (debug_legacy_dish_switch)
 434                         tv[i+1] = ktime_get_boottime();
 435                 if((cmd & 0x01) != last) {
 436                         /* set voltage to (last ? 13V : 18V) */
 437                         stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
 438                         last = (last) ? 0 : 1;
 439                 }
 440
 441                 cmd = cmd >> 1;
 442
 443                 if (i != 8)
 444                         dvb_frontend_sleep_until(&nexttime, 8000);
 445         }
 446         if (debug_legacy_dish_switch) {
 447                 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
 448                         __func__, fe->dvb->num);
 449                 for (i = 1; i < 10; i++)
 450                         printk("%d: %d\n", i,
 451                                (int) ktime_us_delta(tv[i], tv[i-1]));
 452         }
 453
 454         return 0;
 455 }
 456
 457 static int stv0299_init (struct dvb_frontend* fe)
 458 {
 459         struct stv0299_state* state = fe->demodulator_priv;
 460         int i;
 461         u8 reg;
 462         u8 val;
 463
 464         dprintk("stv0299: init chip\n");
 465
 466         stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);
 467         msleep(50);
 468
 469         for (i = 0; ; i += 2)  {
 470                 reg = state->config->inittab[i];
 471                 val = state->config->inittab[i+1];
 472                 if (reg == 0xff && val == 0xff)
 473                         break;
 474                 if (reg == 0x0c && state->config->op0_off)
 475                         val &= ~0x10;
 476                 if (reg == 0x2)
 477                         state->mcr_reg = val & 0xf;
 478                 stv0299_writeregI(state, reg, val);
 479         }
 480
 481         return 0;
 482 }
 483
 484 static int stv0299_read_status(struct dvb_frontend *fe,
 485                                enum fe_status *status)
 486 {
 487         struct stv0299_state* state = fe->demodulator_priv;
 488
 489         u8 signal = 0xff - stv0299_readreg (state, 0x18);
 490         u8 sync = stv0299_readreg (state, 0x1b);
 491
 492         dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
 493         *status = 0;
 494
 495         if (signal > 10)
 496                 *status |= FE_HAS_SIGNAL;
 497
 498         if (sync & 0x80)
 499                 *status |= FE_HAS_CARRIER;
 500
 501         if (sync & 0x10)
 502                 *status |= FE_HAS_VITERBI;
 503
 504         if (sync & 0x08)
 505                 *status |= FE_HAS_SYNC;
 506
 507         if ((sync & 0x98) == 0x98)
 508                 *status |= FE_HAS_LOCK;
 509
 510         return 0;
 511 }
 512
 513 static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
 514 {
 515         struct stv0299_state* state = fe->demodulator_priv;
 516
 517         if (state->errmode != STATUS_BER)
 518                 return -ENOSYS;
 519
 520         *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);
 521
 522         return 0;
 523 }
 524
 525 static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 526 {
 527         struct stv0299_state* state = fe->demodulator_priv;
 528
 529         s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
 530                                | stv0299_readreg (state, 0x19));
 531
 532         dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
 533                  stv0299_readreg (state, 0x18),
 534                  stv0299_readreg (state, 0x19), (int) signal);
 535
 536         signal = signal * 5 / 4;
 537         *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
 538
 539         return 0;
 540 }
 541
 542 static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
 543 {
 544         struct stv0299_state* state = fe->demodulator_priv;
 545
 546         s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
 547                            | stv0299_readreg (state, 0x25));
 548         xsnr = 3 * (xsnr - 0xa100);
 549         *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
 550
 551         return 0;
 552 }
 553
 554 static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 555 {
 556         struct stv0299_state* state = fe->demodulator_priv;
 557
 558         if (state->errmode != STATUS_UCBLOCKS)
 559                 return -ENOSYS;
 560
 561         state->ucblocks += stv0299_readreg(state, 0x1e);
 562         state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
 563         *ucblocks = state->ucblocks;
 564
 565         return 0;
 566 }
 567
 568 static int stv0299_set_frontend(struct dvb_frontend *fe)
 569 {
 570         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 571         struct stv0299_state* state = fe->demodulator_priv;
 572         int invval = 0;
 573
 574         dprintk ("%s : FE_SET_FRONTEND\n", __func__);
 575         if (state->config->set_ts_params)
 576                 state->config->set_ts_params(fe, 0);
 577
 578         // set the inversion
 579         if (p->inversion == INVERSION_OFF) invval = 0;
 580         else if (p->inversion == INVERSION_ON) invval = 1;
 581         else {
 582                 printk("stv0299 does not support auto-inversion\n");
 583                 return -EINVAL;
 584         }
 585         if (state->config->invert) invval = (~invval) & 1;
 586         stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
 587
 588         if (fe->ops.tuner_ops.set_params) {
 589                 fe->ops.tuner_ops.set_params(fe);
 590                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 591         }
 592
 593         stv0299_set_FEC(state, p->fec_inner);
 594         stv0299_set_symbolrate(fe, p->symbol_rate);
 595         stv0299_writeregI(state, 0x22, 0x00);
 596         stv0299_writeregI(state, 0x23, 0x00);
 597
 598         state->tuner_frequency = p->frequency;
 599         state->fec_inner = p->fec_inner;
 600         state->symbol_rate = p->symbol_rate;
 601
 602         return 0;
 603 }
 604
 605 static int stv0299_get_frontend(struct dvb_frontend *fe,
 606                                 struct dtv_frontend_properties *p)
 607 {
 608         struct stv0299_state* state = fe->demodulator_priv;
 609         s32 derot_freq;
 610         int invval;
 611
 612         derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
 613                                 | stv0299_readreg (state, 0x23));
 614
 615         derot_freq *= (state->config->mclk >> 16);
 616         derot_freq += 500;
 617         derot_freq /= 1000;
 618
 619         p->frequency += derot_freq;
 620
 621         invval = stv0299_readreg (state, 0x0c) & 1;
 622         if (state->config->invert) invval = (~invval) & 1;
 623         p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
 624
 625         p->fec_inner = stv0299_get_fec(state);
 626         p->symbol_rate = stv0299_get_symbolrate(state);
 627
 628         return 0;
 629 }
 630
 631 static int stv0299_sleep(struct dvb_frontend* fe)
 632 {
 633         struct stv0299_state* state = fe->demodulator_priv;
 634
 635         stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);
 636         state->initialised = 0;
 637
 638         return 0;
 639 }
 640
 641 static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 642 {
 643         struct stv0299_state* state = fe->demodulator_priv;
 644
 645         if (enable) {
 646                 stv0299_writeregI(state, 0x05, 0xb5);
 647         } else {
 648                 stv0299_writeregI(state, 0x05, 0x35);
 649         }
 650         udelay(1);
 651         return 0;
 652 }
 653
 654 static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 655 {
 656         struct stv0299_state* state = fe->demodulator_priv;
 657         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 658
 659         fesettings->min_delay_ms = state->config->min_delay_ms;
 660         if (p->symbol_rate < 10000000) {
 661                 fesettings->step_size = p->symbol_rate / 32000;
 662                 fesettings->max_drift = 5000;
 663         } else {
 664                 fesettings->step_size = p->symbol_rate / 16000;
 665                 fesettings->max_drift = p->symbol_rate / 2000;
 666         }
 667         return 0;
 668 }
 669
 670 static void stv0299_release(struct dvb_frontend* fe)
 671 {
 672         struct stv0299_state* state = fe->demodulator_priv;
 673         kfree(state);
 674 }
 675
 676 static const struct dvb_frontend_ops stv0299_ops;
 677
 678 struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
 679                                     struct i2c_adapter* i2c)
 680 {
 681         struct stv0299_state* state = NULL;
 682         int id;
 683
 684         /* allocate memory for the internal state */
 685         state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);
 686         if (state == NULL) goto error;
 687
 688         /* setup the state */
 689         state->config = config;
 690         state->i2c = i2c;
 691         state->initialised = 0;
 692         state->tuner_frequency = 0;
 693         state->symbol_rate = 0;
 694         state->fec_inner = 0;
 695         state->errmode = STATUS_BER;
 696
 697         /* check if the demod is there */
 698         stv0299_writeregI(state, 0x02, 0x30); /* standby off */
 699         msleep(200);
 700         id = stv0299_readreg(state, 0x00);
 701
 702         /* register 0x00 contains 0xa1 for STV0299 and STV0299B */
 703         /* register 0x00 might contain 0x80 when returning from standby */
 704         if (id != 0xa1 && id != 0x80) goto error;
 705
 706         /* create dvb_frontend */
 707         memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
 708         state->frontend.demodulator_priv = state;
 709         return &state->frontend;
 710
 711 error:
 712         kfree(state);
 713         return NULL;
 714 }
 715
 716 static const struct dvb_frontend_ops stv0299_ops = {
 717         .delsys = { SYS_DVBS },
 718         .info = {
 719                 .name                   = "ST STV0299 DVB-S",
 720                 .frequency_min          = 950000,
 721                 .frequency_max          = 2150000,
 722                 .frequency_stepsize     = 125,   /* kHz for QPSK frontends */
 723                 .frequency_tolerance    = 0,
 724                 .symbol_rate_min        = 1000000,
 725                 .symbol_rate_max        = 45000000,
 726                 .symbol_rate_tolerance  = 500,  /* ppm */
 727                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 728                       FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 729                       FE_CAN_QPSK |
 730                       FE_CAN_FEC_AUTO
 731         },
 732
 733         .release = stv0299_release,
 734
 735         .init = stv0299_init,
 736         .sleep = stv0299_sleep,
 737         .write = stv0299_write,
 738         .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
 739
 740         .set_frontend = stv0299_set_frontend,
 741         .get_frontend = stv0299_get_frontend,
 742         .get_tune_settings = stv0299_get_tune_settings,
 743
 744         .read_status = stv0299_read_status,
 745         .read_ber = stv0299_read_ber,
 746         .read_signal_strength = stv0299_read_signal_strength,
 747         .read_snr = stv0299_read_snr,
 748         .read_ucblocks = stv0299_read_ucblocks,
 749
 750         .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
 751         .diseqc_send_burst = stv0299_send_diseqc_burst,
 752         .set_tone = stv0299_set_tone,
 753         .set_voltage = stv0299_set_voltage,
 754         .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
 755 };
 756
 757 module_param(debug_legacy_dish_switch, int, 0444);
 758 MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
 759
 760 module_param(debug, int, 0644);
 761 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 762
 763 MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
 764 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
 765 MODULE_LICENSE("GPL");
 766
 767 EXPORT_SYMBOL(stv0299_attach);