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/moduleparam.h>
  49 #include <linux/string.h>
  50 #include <linux/slab.h>
  51 #include <linux/jiffies.h>
  52 #include <asm/div64.h>
  53
  54 #include "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         fe_code_rate_t fec_inner;
  66         int errmode;
  67 };
  68
  69 #define STATUS_BER 0
  70 #define STATUS_UCBLOCKS 1
  71
  72 static int debug;
  73 static int debug_legacy_dish_switch;
  74 #define dprintk(args...) \
  75         do { \
  76                 if (debug) printk(KERN_DEBUG "stv0299: " args); \
  77         } while (0)
  78
  79
  80 static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)
  81 {
  82         int ret;
  83         u8 buf [] = { reg, data };
  84         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
  85
  86         ret = i2c_transfer (state->i2c, &msg, 1);
  87
  88         if (ret != 1)
  89                 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
  90                         "ret == %i)\n", __FUNCTION__, reg, data, ret);
  91
  92         return (ret != 1) ? -EREMOTEIO : 0;
  93 }
  94
  95 int stv0299_writereg (struct dvb_frontend* fe, u8 reg, u8 data)
  96 {
  97         struct stv0299_state* state = fe->demodulator_priv;
  98
  99         return stv0299_writeregI(state, reg, data);
 100 }
 101
 102 static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)
 103 {
 104         int ret;
 105         u8 b0 [] = { reg };
 106         u8 b1 [] = { 0 };
 107         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
 108                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 109
 110         ret = i2c_transfer (state->i2c, msg, 2);
 111
 112         if (ret != 2)
 113                 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
 114                                 __FUNCTION__, reg, ret);
 115
 116         return b1[0];
 117 }
 118
 119 static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)
 120 {
 121         int ret;
 122         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
 123                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
 124
 125         ret = i2c_transfer (state->i2c, msg, 2);
 126
 127         if (ret != 2)
 128                 dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
 129
 130         return ret == 2 ? 0 : ret;
 131 }
 132
 133 static int stv0299_set_FEC (struct stv0299_state* state, fe_code_rate_t fec)
 134 {
 135         dprintk ("%s\n", __FUNCTION__);
 136
 137         switch (fec) {
 138         case FEC_AUTO:
 139         {
 140                 return stv0299_writeregI (state, 0x31, 0x1f);
 141         }
 142         case FEC_1_2:
 143         {
 144                 return stv0299_writeregI (state, 0x31, 0x01);
 145         }
 146         case FEC_2_3:
 147         {
 148                 return stv0299_writeregI (state, 0x31, 0x02);
 149         }
 150         case FEC_3_4:
 151         {
 152                 return stv0299_writeregI (state, 0x31, 0x04);
 153         }
 154         case FEC_5_6:
 155         {
 156                 return stv0299_writeregI (state, 0x31, 0x08);
 157         }
 158         case FEC_7_8:
 159         {
 160                 return stv0299_writeregI (state, 0x31, 0x10);
 161         }
 162         default:
 163         {
 164                 return -EINVAL;
 165         }
 166     }
 167 }
 168
 169 static fe_code_rate_t stv0299_get_fec (struct stv0299_state* state)
 170 {
 171         static fe_code_rate_t fec_tab [] = { FEC_2_3, FEC_3_4, FEC_5_6,
 172                                              FEC_7_8, FEC_1_2 };
 173         u8 index;
 174
 175         dprintk ("%s\n", __FUNCTION__);
 176
 177         index = stv0299_readreg (state, 0x1b);
 178         index &= 0x7;
 179
 180         if (index > 4)
 181                 return FEC_AUTO;
 182
 183         return fec_tab [index];
 184 }
 185
 186 static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)
 187 {
 188         unsigned long start = jiffies;
 189
 190         dprintk ("%s\n", __FUNCTION__);
 191
 192         while (stv0299_readreg(state, 0x0a) & 1) {
 193                 if (jiffies - start > timeout) {
 194                         dprintk ("%s: timeout!!\n", __FUNCTION__);
 195                         return -ETIMEDOUT;
 196                 }
 197                 msleep(10);
 198         };
 199
 200         return 0;
 201 }
 202
 203 static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)
 204 {
 205         unsigned long start = jiffies;
 206
 207         dprintk ("%s\n", __FUNCTION__);
 208
 209         while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {
 210                 if (jiffies - start > timeout) {
 211                         dprintk ("%s: timeout!!\n", __FUNCTION__);
 212                         return -ETIMEDOUT;
 213                 }
 214                 msleep(10);
 215         };
 216
 217         return 0;
 218 }
 219
 220 static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)
 221 {
 222         struct stv0299_state* state = fe->demodulator_priv;
 223         u64 big = srate;
 224         u32 ratio;
 225
 226         // check rate is within limits
 227         if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;
 228
 229         // calculate value to program
 230         big = big << 20;
 231         big += (state->config->mclk-1); // round correctly
 232         do_div(big, state->config->mclk);
 233         ratio = big << 4;
 234
 235         return state->config->set_symbol_rate(fe, srate, ratio);
 236 }
 237
 238 static int stv0299_get_symbolrate (struct stv0299_state* state)
 239 {
 240         u32 Mclk = state->config->mclk / 4096L;
 241         u32 srate;
 242         s32 offset;
 243         u8 sfr[3];
 244         s8 rtf;
 245
 246         dprintk ("%s\n", __FUNCTION__);
 247
 248         stv0299_readregs (state, 0x1f, sfr, 3);
 249         stv0299_readregs (state, 0x1a, &rtf, 1);
 250
 251         srate = (sfr[0] << 8) | sfr[1];
 252         srate *= Mclk;
 253         srate /= 16;
 254         srate += (sfr[2] >> 4) * Mclk / 256;
 255         offset = (s32) rtf * (srate / 4096L);
 256         offset /= 128;
 257
 258         dprintk ("%s : srate = %i\n", __FUNCTION__, srate);
 259         dprintk ("%s : ofset = %i\n", __FUNCTION__, offset);
 260
 261         srate += offset;
 262
 263         srate += 1000;
 264         srate /= 2000;
 265         srate *= 2000;
 266
 267         return srate;
 268 }
 269
 270 static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,
 271                                     struct dvb_diseqc_master_cmd *m)
 272 {
 273         struct stv0299_state* state = fe->demodulator_priv;
 274         u8 val;
 275         int i;
 276
 277         dprintk ("%s\n", __FUNCTION__);
 278
 279         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 280                 return -ETIMEDOUT;
 281
 282         val = stv0299_readreg (state, 0x08);
 283
 284         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6))  /* DiSEqC mode */
 285                 return -EREMOTEIO;
 286
 287         for (i=0; i<m->msg_len; i++) {
 288                 if (stv0299_wait_diseqc_fifo (state, 100) < 0)
 289                         return -ETIMEDOUT;
 290
 291                 if (stv0299_writeregI (state, 0x09, m->msg[i]))
 292                         return -EREMOTEIO;
 293         }
 294
 295         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 296                 return -ETIMEDOUT;
 297
 298         return 0;
 299 }
 300
 301 static int stv0299_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 302 {
 303         struct stv0299_state* state = fe->demodulator_priv;
 304         u8 val;
 305
 306         dprintk ("%s\n", __FUNCTION__);
 307
 308         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 309                 return -ETIMEDOUT;
 310
 311         val = stv0299_readreg (state, 0x08);
 312
 313         if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2))        /* burst mode */
 314                 return -EREMOTEIO;
 315
 316         if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))
 317                 return -EREMOTEIO;
 318
 319         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 320                 return -ETIMEDOUT;
 321
 322         if (stv0299_writeregI (state, 0x08, val))
 323                 return -EREMOTEIO;
 324
 325         return 0;
 326 }
 327
 328 static int stv0299_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 329 {
 330         struct stv0299_state* state = fe->demodulator_priv;
 331         u8 val;
 332
 333         if (stv0299_wait_diseqc_idle (state, 100) < 0)
 334                 return -ETIMEDOUT;
 335
 336         val = stv0299_readreg (state, 0x08);
 337
 338         switch (tone) {
 339         case SEC_TONE_ON:
 340                 return stv0299_writeregI (state, 0x08, val | 0x3);
 341
 342         case SEC_TONE_OFF:
 343                 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);
 344
 345         default:
 346                 return -EINVAL;
 347         }
 348 }
 349
 350 static int stv0299_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 351 {
 352         struct stv0299_state* state = fe->demodulator_priv;
 353         u8 reg0x08;
 354         u8 reg0x0c;
 355
 356         dprintk("%s: %s\n", __FUNCTION__,
 357                 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
 358                 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
 359
 360         reg0x08 = stv0299_readreg (state, 0x08);
 361         reg0x0c = stv0299_readreg (state, 0x0c);
 362
 363         /**
 364          *  H/V switching over OP0, OP1 and OP2 are LNB power enable bits
 365          */
 366         reg0x0c &= 0x0f;
 367
 368         if (voltage == SEC_VOLTAGE_OFF) {
 369                 stv0299_writeregI (state, 0x0c, 0x00); /*       LNB power off! */
 370                 return stv0299_writeregI (state, 0x08, 0x00); /*        LNB power off! */
 371         }
 372
 373         stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
 374
 375         switch (voltage) {
 376         case SEC_VOLTAGE_13:
 377                 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0) reg0x0c |= 0x10;
 378                 else reg0x0c |= 0x40;
 379
 380                 return stv0299_writeregI(state, 0x0c, reg0x0c);
 381
 382         case SEC_VOLTAGE_18:
 383                 return stv0299_writeregI(state, 0x0c, reg0x0c | 0x50);
 384         default:
 385                 return -EINVAL;
 386         };
 387 }
 388
 389 static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
 390 {
 391         struct stv0299_state* state = fe->demodulator_priv;
 392         u8 reg0x08;
 393         u8 reg0x0c;
 394         u8 lv_mask = 0x40;
 395         u8 last = 1;
 396         int i;
 397         struct timeval nexttime;
 398         struct timeval tv[10];
 399
 400         reg0x08 = stv0299_readreg (state, 0x08);
 401         reg0x0c = stv0299_readreg (state, 0x0c);
 402         reg0x0c &= 0x0f;
 403         stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
 404         if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 405                 lv_mask = 0x10;
 406
 407         cmd = cmd << 1;
 408         if (debug_legacy_dish_switch)
 409                 printk ("%s switch command: 0x%04lx\n",__FUNCTION__, cmd);
 410
 411         do_gettimeofday (&nexttime);
 412         if (debug_legacy_dish_switch)
 413                 memcpy (&tv[0], &nexttime, sizeof (struct timeval));
 414         stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
 415
 416         dvb_frontend_sleep_until(&nexttime, 32000);
 417
 418         for (i=0; i<9; i++) {
 419                 if (debug_legacy_dish_switch)
 420                         do_gettimeofday (&tv[i+1]);
 421                 if((cmd & 0x01) != last) {
 422                         /* set voltage to (last ? 13V : 18V) */
 423                         stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
 424                         last = (last) ? 0 : 1;
 425                 }
 426
 427                 cmd = cmd >> 1;
 428
 429                 if (i != 8)
 430                         dvb_frontend_sleep_until(&nexttime, 8000);
 431         }
 432         if (debug_legacy_dish_switch) {
 433                 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
 434                         __FUNCTION__, fe->dvb->num);
 435                 for (i = 1; i < 10; i++)
 436                         printk ("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
 437         }
 438
 439         return 0;
 440 }
 441
 442 static int stv0299_init (struct dvb_frontend* fe)
 443 {
 444         struct stv0299_state* state = fe->demodulator_priv;
 445         int i;
 446
 447         dprintk("stv0299: init chip\n");
 448
 449         for (i=0; !(state->config->inittab[i] == 0xff && state->config->inittab[i+1] == 0xff); i+=2)
 450                 stv0299_writeregI(state, state->config->inittab[i], state->config->inittab[i+1]);
 451
 452         return 0;
 453 }
 454
 455 static int stv0299_read_status(struct dvb_frontend* fe, fe_status_t* status)
 456 {
 457         struct stv0299_state* state = fe->demodulator_priv;
 458
 459         u8 signal = 0xff - stv0299_readreg (state, 0x18);
 460         u8 sync = stv0299_readreg (state, 0x1b);
 461
 462         dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __FUNCTION__, sync);
 463         *status = 0;
 464
 465         if (signal > 10)
 466                 *status |= FE_HAS_SIGNAL;
 467
 468         if (sync & 0x80)
 469                 *status |= FE_HAS_CARRIER;
 470
 471         if (sync & 0x10)
 472                 *status |= FE_HAS_VITERBI;
 473
 474         if (sync & 0x08)
 475                 *status |= FE_HAS_SYNC;
 476
 477         if ((sync & 0x98) == 0x98)
 478                 *status |= FE_HAS_LOCK;
 479
 480         return 0;
 481 }
 482
 483 static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
 484 {
 485         struct stv0299_state* state = fe->demodulator_priv;
 486
 487         if (state->errmode != STATUS_BER) return 0;
 488         *ber = (stv0299_readreg (state, 0x1d) << 8) | stv0299_readreg (state, 0x1e);
 489
 490         return 0;
 491 }
 492
 493 static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 494 {
 495         struct stv0299_state* state = fe->demodulator_priv;
 496
 497         s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
 498                                | stv0299_readreg (state, 0x19));
 499
 500         dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __FUNCTION__,
 501                  stv0299_readreg (state, 0x18),
 502                  stv0299_readreg (state, 0x19), (int) signal);
 503
 504         signal = signal * 5 / 4;
 505         *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
 506
 507         return 0;
 508 }
 509
 510 static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
 511 {
 512         struct stv0299_state* state = fe->demodulator_priv;
 513
 514         s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
 515                            | stv0299_readreg (state, 0x25));
 516         xsnr = 3 * (xsnr - 0xa100);
 517         *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
 518
 519         return 0;
 520 }
 521
 522 static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 523 {
 524         struct stv0299_state* state = fe->demodulator_priv;
 525
 526         if (state->errmode != STATUS_UCBLOCKS) *ucblocks = 0;
 527         else *ucblocks = (stv0299_readreg (state, 0x1d) << 8) | stv0299_readreg (state, 0x1e);
 528
 529         return 0;
 530 }
 531
 532 static int stv0299_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
 533 {
 534         struct stv0299_state* state = fe->demodulator_priv;
 535         int invval = 0;
 536
 537         dprintk ("%s : FE_SET_FRONTEND\n", __FUNCTION__);
 538
 539         // set the inversion
 540         if (p->inversion == INVERSION_OFF) invval = 0;
 541         else if (p->inversion == INVERSION_ON) invval = 1;
 542         else {
 543                 printk("stv0299 does not support auto-inversion\n");
 544                 return -EINVAL;
 545         }
 546         if (state->config->invert) invval = (~invval) & 1;
 547         stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
 548
 549         if (fe->ops.tuner_ops.set_params) {
 550                 fe->ops.tuner_ops.set_params(fe, p);
 551                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 552         }
 553
 554         stv0299_set_FEC (state, p->u.qpsk.fec_inner);
 555         stv0299_set_symbolrate (fe, p->u.qpsk.symbol_rate);
 556         stv0299_writeregI(state, 0x22, 0x00);
 557         stv0299_writeregI(state, 0x23, 0x00);
 558
 559         state->tuner_frequency = p->frequency;
 560         state->fec_inner = p->u.qpsk.fec_inner;
 561         state->symbol_rate = p->u.qpsk.symbol_rate;
 562
 563         return 0;
 564 }
 565
 566 static int stv0299_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
 567 {
 568         struct stv0299_state* state = fe->demodulator_priv;
 569         s32 derot_freq;
 570         int invval;
 571
 572         derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
 573                                 | stv0299_readreg (state, 0x23));
 574
 575         derot_freq *= (state->config->mclk >> 16);
 576         derot_freq += 500;
 577         derot_freq /= 1000;
 578
 579         p->frequency += derot_freq;
 580
 581         invval = stv0299_readreg (state, 0x0c) & 1;
 582         if (state->config->invert) invval = (~invval) & 1;
 583         p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
 584
 585         p->u.qpsk.fec_inner = stv0299_get_fec (state);
 586         p->u.qpsk.symbol_rate = stv0299_get_symbolrate (state);
 587
 588         return 0;
 589 }
 590
 591 static int stv0299_sleep(struct dvb_frontend* fe)
 592 {
 593         struct stv0299_state* state = fe->demodulator_priv;
 594
 595         stv0299_writeregI(state, 0x02, 0x80);
 596         state->initialised = 0;
 597
 598         return 0;
 599 }
 600
 601 static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 602 {
 603         struct stv0299_state* state = fe->demodulator_priv;
 604
 605         if (enable) {
 606                 stv0299_writeregI(state, 0x05, 0xb5);
 607         } else {
 608                 stv0299_writeregI(state, 0x05, 0x35);
 609         }
 610         udelay(1);
 611         return 0;
 612 }
 613
 614 static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 615 {
 616         struct stv0299_state* state = fe->demodulator_priv;
 617
 618         fesettings->min_delay_ms = state->config->min_delay_ms;
 619         if (fesettings->parameters.u.qpsk.symbol_rate < 10000000) {
 620                 fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 32000;
 621                 fesettings->max_drift = 5000;
 622         } else {
 623                 fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 16000;
 624                 fesettings->max_drift = fesettings->parameters.u.qpsk.symbol_rate / 2000;
 625         }
 626         return 0;
 627 }
 628
 629 static void stv0299_release(struct dvb_frontend* fe)
 630 {
 631         struct stv0299_state* state = fe->demodulator_priv;
 632         kfree(state);
 633 }
 634
 635 static struct dvb_frontend_ops stv0299_ops;
 636
 637 struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
 638                                     struct i2c_adapter* i2c)
 639 {
 640         struct stv0299_state* state = NULL;
 641         int id;
 642
 643         /* allocate memory for the internal state */
 644         state = kmalloc(sizeof(struct stv0299_state), GFP_KERNEL);
 645         if (state == NULL) goto error;
 646
 647         /* setup the state */
 648         state->config = config;
 649         state->i2c = i2c;
 650         state->initialised = 0;
 651         state->tuner_frequency = 0;
 652         state->symbol_rate = 0;
 653         state->fec_inner = 0;
 654         state->errmode = STATUS_BER;
 655
 656         /* check if the demod is there */
 657         stv0299_writeregI(state, 0x02, 0x34); /* standby off */
 658         msleep(200);
 659         id = stv0299_readreg(state, 0x00);
 660
 661         /* register 0x00 contains 0xa1 for STV0299 and STV0299B */
 662         /* register 0x00 might contain 0x80 when returning from standby */
 663         if (id != 0xa1 && id != 0x80) goto error;
 664
 665         /* create dvb_frontend */
 666         memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
 667         state->frontend.demodulator_priv = state;
 668         return &state->frontend;
 669
 670 error:
 671         kfree(state);
 672         return NULL;
 673 }
 674
 675 static struct dvb_frontend_ops stv0299_ops = {
 676
 677         .info = {
 678                 .name                   = "ST STV0299 DVB-S",
 679                 .type                   = FE_QPSK,
 680                 .frequency_min          = 950000,
 681                 .frequency_max          = 2150000,
 682                 .frequency_stepsize     = 125,   /* kHz for QPSK frontends */
 683                 .frequency_tolerance    = 0,
 684                 .symbol_rate_min        = 1000000,
 685                 .symbol_rate_max        = 45000000,
 686                 .symbol_rate_tolerance  = 500,  /* ppm */
 687                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 688                       FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 689                       FE_CAN_QPSK |
 690                       FE_CAN_FEC_AUTO
 691         },
 692
 693         .release = stv0299_release,
 694
 695         .init = stv0299_init,
 696         .sleep = stv0299_sleep,
 697         .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,
 698
 699         .set_frontend = stv0299_set_frontend,
 700         .get_frontend = stv0299_get_frontend,
 701         .get_tune_settings = stv0299_get_tune_settings,
 702
 703         .read_status = stv0299_read_status,
 704         .read_ber = stv0299_read_ber,
 705         .read_signal_strength = stv0299_read_signal_strength,
 706         .read_snr = stv0299_read_snr,
 707         .read_ucblocks = stv0299_read_ucblocks,
 708
 709         .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
 710         .diseqc_send_burst = stv0299_send_diseqc_burst,
 711         .set_tone = stv0299_set_tone,
 712         .set_voltage = stv0299_set_voltage,
 713         .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
 714 };
 715
 716 module_param(debug_legacy_dish_switch, int, 0444);
 717 MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
 718
 719 module_param(debug, int, 0644);
 720 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 721
 722 MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
 723 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, "
 724               "Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
 725 MODULE_LICENSE("GPL");
 726
 727 EXPORT_SYMBOL(stv0299_writereg);
 728 EXPORT_SYMBOL(stv0299_attach);