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 <asm/div64.h>
  52
  53 #include "dvb_frontend.h"
  54 #include "stv0299.h"
  55
  56 struct stv0299_state {
  57         struct i2c_adapter* i2c;
  58         struct dvb_frontend_ops ops;
  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 inline s32 stv0299_calc_usec_delay (struct timeval lasttime, struct timeval curtime)
 390 {
 391         return ((curtime.tv_usec < lasttime.tv_usec) ?
 392                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 393                 curtime.tv_usec - lasttime.tv_usec);
 394 }
 395
 396 static void stv0299_sleep_until (struct timeval *waketime, u32 add_usec)
 397 {
 398         struct timeval lasttime;
 399         s32 delta, newdelta;
 400
 401         waketime->tv_usec += add_usec;
 402         if (waketime->tv_usec >= 1000000) {
 403                 waketime->tv_usec -= 1000000;
 404                 waketime->tv_sec++;
 405         }
 406
 407         do_gettimeofday (&lasttime);
 408         delta = stv0299_calc_usec_delay (lasttime, *waketime);
 409         if (delta > 2500) {
 410                 msleep ((delta - 1500) / 1000);
 411                 do_gettimeofday (&lasttime);
 412                 newdelta = stv0299_calc_usec_delay (lasttime, *waketime);
 413                 delta = (newdelta > delta) ? 0 : newdelta;
 414         }
 415         if (delta > 0)
 416                 udelay (delta);
 417 }
 418
 419 static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, u32 cmd)
 420 {
 421         struct stv0299_state* state = fe->demodulator_priv;
 422         u8 reg0x08;
 423         u8 reg0x0c;
 424         u8 lv_mask = 0x40;
 425         u8 last = 1;
 426         int i;
 427         struct timeval nexttime;
 428         struct timeval tv[10];
 429
 430         reg0x08 = stv0299_readreg (state, 0x08);
 431         reg0x0c = stv0299_readreg (state, 0x0c);
 432         reg0x0c &= 0x0f;
 433         stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
 434         if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
 435                 lv_mask = 0x10;
 436
 437         cmd = cmd << 1;
 438         if (debug_legacy_dish_switch)
 439                 printk ("%s switch command: 0x%04x\n",__FUNCTION__, cmd);
 440
 441         do_gettimeofday (&nexttime);
 442         if (debug_legacy_dish_switch)
 443                 memcpy (&tv[0], &nexttime, sizeof (struct timeval));
 444         stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */
 445
 446         stv0299_sleep_until (&nexttime, 32000);
 447
 448         for (i=0; i<9; i++) {
 449                 if (debug_legacy_dish_switch)
 450                         do_gettimeofday (&tv[i+1]);
 451                 if((cmd & 0x01) != last) {
 452                         /* set voltage to (last ? 13V : 18V) */
 453                         stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
 454                         last = (last) ? 0 : 1;
 455                 }
 456
 457                 cmd = cmd >> 1;
 458
 459                 if (i != 8)
 460                         stv0299_sleep_until (&nexttime, 8000);
 461         }
 462         if (debug_legacy_dish_switch) {
 463                 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
 464                         __FUNCTION__, fe->dvb->num);
 465                 for (i=1; i < 10; i++)
 466                         printk ("%d: %d\n", i, stv0299_calc_usec_delay (tv[i-1] , tv[i]));
 467         }
 468
 469         return 0;
 470 }
 471
 472 static int stv0299_init (struct dvb_frontend* fe)
 473 {
 474         struct stv0299_state* state = fe->demodulator_priv;
 475         int i;
 476
 477         dprintk("stv0299: init chip\n");
 478
 479         for (i=0; !(state->config->inittab[i] == 0xff && state->config->inittab[i+1] == 0xff); i+=2)
 480                 stv0299_writeregI(state, state->config->inittab[i], state->config->inittab[i+1]);
 481
 482         if (state->config->pll_init) {
 483                 stv0299_writeregI(state, 0x05, 0xb5);   /*  enable i2c repeater on stv0299  */
 484                 state->config->pll_init(fe);
 485                 stv0299_writeregI(state, 0x05, 0x35);   /*  disable i2c repeater on stv0299  */
 486         }
 487
 488         return 0;
 489 }
 490
 491 static int stv0299_read_status(struct dvb_frontend* fe, fe_status_t* status)
 492 {
 493         struct stv0299_state* state = fe->demodulator_priv;
 494
 495         u8 signal = 0xff - stv0299_readreg (state, 0x18);
 496         u8 sync = stv0299_readreg (state, 0x1b);
 497
 498         dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __FUNCTION__, sync);
 499         *status = 0;
 500
 501         if (signal > 10)
 502                 *status |= FE_HAS_SIGNAL;
 503
 504         if (sync & 0x80)
 505                 *status |= FE_HAS_CARRIER;
 506
 507         if (sync & 0x10)
 508                 *status |= FE_HAS_VITERBI;
 509
 510         if (sync & 0x08)
 511                 *status |= FE_HAS_SYNC;
 512
 513         if ((sync & 0x98) == 0x98)
 514                 *status |= FE_HAS_LOCK;
 515
 516         return 0;
 517 }
 518
 519 static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
 520 {
 521         struct stv0299_state* state = fe->demodulator_priv;
 522
 523         if (state->errmode != STATUS_BER) return 0;
 524         *ber = (stv0299_readreg (state, 0x1d) << 8) | stv0299_readreg (state, 0x1e);
 525
 526         return 0;
 527 }
 528
 529 static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 530 {
 531         struct stv0299_state* state = fe->demodulator_priv;
 532
 533         s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
 534                                | stv0299_readreg (state, 0x19));
 535
 536         dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __FUNCTION__,
 537                  stv0299_readreg (state, 0x18),
 538                  stv0299_readreg (state, 0x19), (int) signal);
 539
 540         signal = signal * 5 / 4;
 541         *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
 542
 543         return 0;
 544 }
 545
 546 static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
 547 {
 548         struct stv0299_state* state = fe->demodulator_priv;
 549
 550         s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
 551                            | stv0299_readreg (state, 0x25));
 552         xsnr = 3 * (xsnr - 0xa100);
 553         *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
 554
 555         return 0;
 556 }
 557
 558 static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 559 {
 560         struct stv0299_state* state = fe->demodulator_priv;
 561
 562         if (state->errmode != STATUS_UCBLOCKS) *ucblocks = 0;
 563         else *ucblocks = (stv0299_readreg (state, 0x1d) << 8) | stv0299_readreg (state, 0x1e);
 564
 565         return 0;
 566 }
 567
 568 static int stv0299_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
 569 {
 570         struct stv0299_state* state = fe->demodulator_priv;
 571         int invval = 0;
 572
 573         dprintk ("%s : FE_SET_FRONTEND\n", __FUNCTION__);
 574
 575         // set the inversion
 576         if (p->inversion == INVERSION_OFF) invval = 0;
 577         else if (p->inversion == INVERSION_ON) invval = 1;
 578         else {
 579                 printk("stv0299 does not support auto-inversion\n");
 580                 return -EINVAL;
 581         }
 582         if (state->config->invert) invval = (~invval) & 1;
 583         stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);
 584
 585         if (state->config->enhanced_tuning) {
 586                 /* check if we should do a finetune */
 587                 int frequency_delta = p->frequency - state->tuner_frequency;
 588                 int minmax = p->u.qpsk.symbol_rate / 2000;
 589                 if (minmax < 5000) minmax = 5000;
 590
 591                 if ((frequency_delta > -minmax) && (frequency_delta < minmax) && (frequency_delta != 0) &&
 592                     (state->fec_inner == p->u.qpsk.fec_inner) &&
 593                     (state->symbol_rate == p->u.qpsk.symbol_rate)) {
 594                         int Drot_freq = (frequency_delta << 16) / (state->config->mclk / 1000);
 595
 596                         // zap the derotator registers first
 597                         stv0299_writeregI(state, 0x22, 0x00);
 598                         stv0299_writeregI(state, 0x23, 0x00);
 599
 600                         // now set them as we want
 601                         stv0299_writeregI(state, 0x22, Drot_freq >> 8);
 602                         stv0299_writeregI(state, 0x23, Drot_freq);
 603                 } else {
 604                         /* A "normal" tune is requested */
 605                         stv0299_writeregI(state, 0x05, 0xb5);   /*  enable i2c repeater on stv0299  */
 606                         state->config->pll_set(fe, p);
 607                         stv0299_writeregI(state, 0x05, 0x35);   /*  disable i2c repeater on stv0299  */
 608
 609                         stv0299_writeregI(state, 0x32, 0x80);
 610                         stv0299_writeregI(state, 0x22, 0x00);
 611                         stv0299_writeregI(state, 0x23, 0x00);
 612                         stv0299_writeregI(state, 0x32, 0x19);
 613                         stv0299_set_symbolrate (fe, p->u.qpsk.symbol_rate);
 614                         stv0299_set_FEC (state, p->u.qpsk.fec_inner);
 615                 }
 616         } else {
 617                 stv0299_writeregI(state, 0x05, 0xb5);   /*  enable i2c repeater on stv0299  */
 618                 state->config->pll_set(fe, p);
 619                 stv0299_writeregI(state, 0x05, 0x35);   /*  disable i2c repeater on stv0299  */
 620
 621                 stv0299_set_FEC (state, p->u.qpsk.fec_inner);
 622                 stv0299_set_symbolrate (fe, p->u.qpsk.symbol_rate);
 623                 stv0299_writeregI(state, 0x22, 0x00);
 624                 stv0299_writeregI(state, 0x23, 0x00);
 625                 stv0299_readreg (state, 0x23);
 626                 stv0299_writeregI(state, 0x12, 0xb9);
 627         }
 628
 629         state->tuner_frequency = p->frequency;
 630         state->fec_inner = p->u.qpsk.fec_inner;
 631         state->symbol_rate = p->u.qpsk.symbol_rate;
 632
 633         return 0;
 634 }
 635
 636 static int stv0299_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
 637 {
 638         struct stv0299_state* state = fe->demodulator_priv;
 639         s32 derot_freq;
 640         int invval;
 641
 642         derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
 643                                 | stv0299_readreg (state, 0x23));
 644
 645         derot_freq *= (state->config->mclk >> 16);
 646         derot_freq += 500;
 647         derot_freq /= 1000;
 648
 649         p->frequency += derot_freq;
 650
 651         invval = stv0299_readreg (state, 0x0c) & 1;
 652         if (state->config->invert) invval = (~invval) & 1;
 653         p->inversion = invval ? INVERSION_ON : INVERSION_OFF;
 654
 655         p->u.qpsk.fec_inner = stv0299_get_fec (state);
 656         p->u.qpsk.symbol_rate = stv0299_get_symbolrate (state);
 657
 658         return 0;
 659 }
 660
 661 static int stv0299_sleep(struct dvb_frontend* fe)
 662 {
 663         struct stv0299_state* state = fe->demodulator_priv;
 664
 665         stv0299_writeregI(state, 0x02, 0x80);
 666         state->initialised = 0;
 667
 668         return 0;
 669 }
 670
 671 static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 672 {
 673         struct stv0299_state* state = fe->demodulator_priv;
 674
 675         fesettings->min_delay_ms = state->config->min_delay_ms;
 676         if (fesettings->parameters.u.qpsk.symbol_rate < 10000000) {
 677                 fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 32000;
 678                 fesettings->max_drift = 5000;
 679         } else {
 680                 fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 16000;
 681                 fesettings->max_drift = fesettings->parameters.u.qpsk.symbol_rate / 2000;
 682         }
 683         return 0;
 684 }
 685
 686 static void stv0299_release(struct dvb_frontend* fe)
 687 {
 688         struct stv0299_state* state = fe->demodulator_priv;
 689         kfree(state);
 690 }
 691
 692 static struct dvb_frontend_ops stv0299_ops;
 693
 694 struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
 695                                     struct i2c_adapter* i2c)
 696 {
 697         struct stv0299_state* state = NULL;
 698         int id;
 699
 700         /* allocate memory for the internal state */
 701         state = kmalloc(sizeof(struct stv0299_state), GFP_KERNEL);
 702         if (state == NULL) goto error;
 703
 704         /* setup the state */
 705         state->config = config;
 706         state->i2c = i2c;
 707         memcpy(&state->ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
 708         state->initialised = 0;
 709         state->tuner_frequency = 0;
 710         state->symbol_rate = 0;
 711         state->fec_inner = 0;
 712         state->errmode = STATUS_BER;
 713
 714         /* check if the demod is there */
 715         stv0299_writeregI(state, 0x02, 0x34); /* standby off */
 716         msleep(200);
 717         id = stv0299_readreg(state, 0x00);
 718
 719         /* register 0x00 contains 0xa1 for STV0299 and STV0299B */
 720         /* register 0x00 might contain 0x80 when returning from standby */
 721         if (id != 0xa1 && id != 0x80) goto error;
 722
 723         /* create dvb_frontend */
 724         state->frontend.ops = &state->ops;
 725         state->frontend.demodulator_priv = state;
 726         return &state->frontend;
 727
 728 error:
 729         kfree(state);
 730         return NULL;
 731 }
 732
 733 static struct dvb_frontend_ops stv0299_ops = {
 734
 735         .info = {
 736                 .name                   = "ST STV0299 DVB-S",
 737                 .type                   = FE_QPSK,
 738                 .frequency_min          = 950000,
 739                 .frequency_max          = 2150000,
 740                 .frequency_stepsize     = 125,   /* kHz for QPSK frontends */
 741                 .frequency_tolerance    = 0,
 742                 .symbol_rate_min        = 1000000,
 743                 .symbol_rate_max        = 45000000,
 744                 .symbol_rate_tolerance  = 500,  /* ppm */
 745                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 746                       FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 747                       FE_CAN_QPSK |
 748                       FE_CAN_FEC_AUTO
 749         },
 750
 751         .release = stv0299_release,
 752
 753         .init = stv0299_init,
 754         .sleep = stv0299_sleep,
 755
 756         .set_frontend = stv0299_set_frontend,
 757         .get_frontend = stv0299_get_frontend,
 758         .get_tune_settings = stv0299_get_tune_settings,
 759
 760         .read_status = stv0299_read_status,
 761         .read_ber = stv0299_read_ber,
 762         .read_signal_strength = stv0299_read_signal_strength,
 763         .read_snr = stv0299_read_snr,
 764         .read_ucblocks = stv0299_read_ucblocks,
 765
 766         .diseqc_send_master_cmd = stv0299_send_diseqc_msg,
 767         .diseqc_send_burst = stv0299_send_diseqc_burst,
 768         .set_tone = stv0299_set_tone,
 769         .set_voltage = stv0299_set_voltage,
 770         .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
 771 };
 772
 773 module_param(debug_legacy_dish_switch, int, 0444);
 774 MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");
 775
 776 module_param(debug, int, 0644);
 777 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 778
 779 MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
 780 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, "
 781               "Andreas Oberritter, Andrew de Quincey, Kenneth Aafløy");
 782 MODULE_LICENSE("GPL");
 783
 784 EXPORT_SYMBOL(stv0299_writereg);
 785 EXPORT_SYMBOL(stv0299_attach);