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