kernel/drivers/media/dvb-frontends/tda10086.c

   1   /*
   2      Driver for Philips tda10086 DVBS Demodulator
   3
   4      (c) 2006 Andrew de Quincey
   5
   6      This program is free software; you can redistribute it and/or modify
   7      it under the terms of the GNU General Public License as published by
   8      the Free Software Foundation; either version 2 of the License, or
   9      (at your option) any later version.
  10
  11      This program is distributed in the hope that it will be useful,
  12      but WITHOUT ANY WARRANTY; without even the implied warranty of
  13      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14
  15      GNU General Public License for more details.
  16
  17      You should have received a copy of the GNU General Public License
  18      along with this program; if not, write to the Free Software
  19      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21    */
  22
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/device.h>
  26 #include <linux/jiffies.h>
  27 #include <linux/string.h>
  28 #include <linux/slab.h>
  29
  30 #include "dvb_frontend.h"
  31 #include "tda10086.h"
  32
  33 #define SACLK 96000000
  34
  35 struct tda10086_state {
  36         struct i2c_adapter* i2c;
  37         const struct tda10086_config* config;
  38         struct dvb_frontend frontend;
  39
  40         /* private demod data */
  41         u32 frequency;
  42         u32 symbol_rate;
  43         bool has_lock;
  44 };
  45
  46 static int debug;
  47 #define dprintk(args...) \
  48         do { \
  49                 if (debug) printk(KERN_DEBUG "tda10086: " args); \
  50         } while (0)
  51
  52 static int tda10086_write_byte(struct tda10086_state *state, int reg, int data)
  53 {
  54         int ret;
  55         u8 b0[] = { reg, data };
  56         struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 };
  57
  58         msg.addr = state->config->demod_address;
  59         ret = i2c_transfer(state->i2c, &msg, 1);
  60
  61         if (ret != 1)
  62                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
  63                         __func__, reg, data, ret);
  64
  65         return (ret != 1) ? ret : 0;
  66 }
  67
  68 static int tda10086_read_byte(struct tda10086_state *state, int reg)
  69 {
  70         int ret;
  71         u8 b0[] = { reg };
  72         u8 b1[] = { 0 };
  73         struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 },
  74                                 { .flags = I2C_M_RD, .buf = b1, .len = 1 }};
  75
  76         msg[0].addr = state->config->demod_address;
  77         msg[1].addr = state->config->demod_address;
  78         ret = i2c_transfer(state->i2c, msg, 2);
  79
  80         if (ret != 2) {
  81                 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg,
  82                         ret);
  83                 return ret;
  84         }
  85
  86         return b1[0];
  87 }
  88
  89 static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data)
  90 {
  91         int val;
  92
  93         /* read a byte and check */
  94         val = tda10086_read_byte(state, reg);
  95         if (val < 0)
  96                 return val;
  97
  98         /* mask if off */
  99         val = val & ~mask;
 100         val |= data & 0xff;
 101
 102         /* write it out again */
 103         return tda10086_write_byte(state, reg, val);
 104 }
 105
 106 static int tda10086_init(struct dvb_frontend* fe)
 107 {
 108         struct tda10086_state* state = fe->demodulator_priv;
 109         u8 t22k_off = 0x80;
 110
 111         dprintk ("%s\n", __func__);
 112
 113         if (state->config->diseqc_tone)
 114                 t22k_off = 0;
 115         /* reset */
 116         tda10086_write_byte(state, 0x00, 0x00);
 117         msleep(10);
 118
 119         /* misc setup */
 120         tda10086_write_byte(state, 0x01, 0x94);
 121         tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */
 122         tda10086_write_byte(state, 0x03, 0xe4);
 123         tda10086_write_byte(state, 0x04, 0x43);
 124         tda10086_write_byte(state, 0x0c, 0x0c);
 125         tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */
 126         tda10086_write_byte(state, 0x20, 0x89); /* misc */
 127         tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */
 128         tda10086_write_byte(state, 0x32, 0x00); /* irq off */
 129         tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */
 130
 131         /* setup PLL (this assumes SACLK = 96MHz) */
 132         tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */
 133         if (state->config->xtal_freq == TDA10086_XTAL_16M) {
 134                 tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */
 135                 tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */
 136         } else {
 137                 tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */
 138                 tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */
 139         }
 140         tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */
 141
 142         /* setup TS interface */
 143         tda10086_write_byte(state, 0x11, 0x81);
 144         tda10086_write_byte(state, 0x12, 0x81);
 145         tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */
 146         tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */
 147         tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */
 148         tda10086_write_byte(state, 0x10, 0x2a);
 149
 150         /* setup ADC */
 151         tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */
 152         tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */
 153
 154         /* setup AGC */
 155         tda10086_write_byte(state, 0x05, 0x0B);
 156         tda10086_write_byte(state, 0x37, 0x63);
 157         tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */
 158         tda10086_write_byte(state, 0x40, 0x64);
 159         tda10086_write_byte(state, 0x41, 0x4f);
 160         tda10086_write_byte(state, 0x42, 0x43);
 161
 162         /* setup viterbi */
 163         tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */
 164
 165         /* setup carrier recovery */
 166         tda10086_write_byte(state, 0x3d, 0x80);
 167
 168         /* setup SEC */
 169         tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */
 170         tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000)));
 171         tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8);
 172
 173         return 0;
 174 }
 175
 176 static void tda10086_diseqc_wait(struct tda10086_state *state)
 177 {
 178         unsigned long timeout = jiffies + msecs_to_jiffies(200);
 179         while (!(tda10086_read_byte(state, 0x50) & 0x01)) {
 180                 if(time_after(jiffies, timeout)) {
 181                         printk("%s: diseqc queue not ready, command may be lost.\n", __func__);
 182                         break;
 183                 }
 184                 msleep(10);
 185         }
 186 }
 187
 188 static int tda10086_set_tone(struct dvb_frontend *fe,
 189                              enum fe_sec_tone_mode tone)
 190 {
 191         struct tda10086_state* state = fe->demodulator_priv;
 192         u8 t22k_off = 0x80;
 193
 194         dprintk ("%s\n", __func__);
 195
 196         if (state->config->diseqc_tone)
 197                 t22k_off = 0;
 198
 199         switch (tone) {
 200         case SEC_TONE_OFF:
 201                 tda10086_write_byte(state, 0x36, t22k_off);
 202                 break;
 203
 204         case SEC_TONE_ON:
 205                 tda10086_write_byte(state, 0x36, 0x01 + t22k_off);
 206                 break;
 207         }
 208
 209         return 0;
 210 }
 211
 212 static int tda10086_send_master_cmd (struct dvb_frontend* fe,
 213                                     struct dvb_diseqc_master_cmd* cmd)
 214 {
 215         struct tda10086_state* state = fe->demodulator_priv;
 216         int i;
 217         u8 oldval;
 218         u8 t22k_off = 0x80;
 219
 220         dprintk ("%s\n", __func__);
 221
 222         if (state->config->diseqc_tone)
 223                 t22k_off = 0;
 224
 225         if (cmd->msg_len > 6)
 226                 return -EINVAL;
 227         oldval = tda10086_read_byte(state, 0x36);
 228
 229         for(i=0; i< cmd->msg_len; i++) {
 230                 tda10086_write_byte(state, 0x48+i, cmd->msg[i]);
 231         }
 232         tda10086_write_byte(state, 0x36, (0x08 + t22k_off)
 233                                         | ((cmd->msg_len - 1) << 4));
 234
 235         tda10086_diseqc_wait(state);
 236
 237         tda10086_write_byte(state, 0x36, oldval);
 238
 239         return 0;
 240 }
 241
 242 static int tda10086_send_burst(struct dvb_frontend *fe,
 243                                enum fe_sec_mini_cmd minicmd)
 244 {
 245         struct tda10086_state* state = fe->demodulator_priv;
 246         u8 oldval = tda10086_read_byte(state, 0x36);
 247         u8 t22k_off = 0x80;
 248
 249         dprintk ("%s\n", __func__);
 250
 251         if (state->config->diseqc_tone)
 252                 t22k_off = 0;
 253
 254         switch(minicmd) {
 255         case SEC_MINI_A:
 256                 tda10086_write_byte(state, 0x36, 0x04 + t22k_off);
 257                 break;
 258
 259         case SEC_MINI_B:
 260                 tda10086_write_byte(state, 0x36, 0x06 + t22k_off);
 261                 break;
 262         }
 263
 264         tda10086_diseqc_wait(state);
 265
 266         tda10086_write_byte(state, 0x36, oldval);
 267
 268         return 0;
 269 }
 270
 271 static int tda10086_set_inversion(struct tda10086_state *state,
 272                                   struct dtv_frontend_properties *fe_params)
 273 {
 274         u8 invval = 0x80;
 275
 276         dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert);
 277
 278         switch(fe_params->inversion) {
 279         case INVERSION_OFF:
 280                 if (state->config->invert)
 281                         invval = 0x40;
 282                 break;
 283         case INVERSION_ON:
 284                 if (!state->config->invert)
 285                         invval = 0x40;
 286                 break;
 287         case INVERSION_AUTO:
 288                 invval = 0x00;
 289                 break;
 290         }
 291         tda10086_write_mask(state, 0x0c, 0xc0, invval);
 292
 293         return 0;
 294 }
 295
 296 static int tda10086_set_symbol_rate(struct tda10086_state *state,
 297                                     struct dtv_frontend_properties *fe_params)
 298 {
 299         u8 dfn = 0;
 300         u8 afs = 0;
 301         u8 byp = 0;
 302         u8 reg37 = 0x43;
 303         u8 reg42 = 0x43;
 304         u64 big;
 305         u32 tmp;
 306         u32 bdr;
 307         u32 bdri;
 308         u32 symbol_rate = fe_params->symbol_rate;
 309
 310         dprintk ("%s %i\n", __func__, symbol_rate);
 311
 312         /* setup the decimation and anti-aliasing filters.. */
 313         if (symbol_rate < (u32) (SACLK * 0.0137)) {
 314                 dfn=4;
 315                 afs=1;
 316         } else if (symbol_rate < (u32) (SACLK * 0.0208)) {
 317                 dfn=4;
 318                 afs=0;
 319         } else if (symbol_rate < (u32) (SACLK * 0.0270)) {
 320                 dfn=3;
 321                 afs=1;
 322         } else if (symbol_rate < (u32) (SACLK * 0.0416)) {
 323                 dfn=3;
 324                 afs=0;
 325         } else if (symbol_rate < (u32) (SACLK * 0.0550)) {
 326                 dfn=2;
 327                 afs=1;
 328         } else if (symbol_rate < (u32) (SACLK * 0.0833)) {
 329                 dfn=2;
 330                 afs=0;
 331         } else if (symbol_rate < (u32) (SACLK * 0.1100)) {
 332                 dfn=1;
 333                 afs=1;
 334         } else if (symbol_rate < (u32) (SACLK * 0.1666)) {
 335                 dfn=1;
 336                 afs=0;
 337         } else if (symbol_rate < (u32) (SACLK * 0.2200)) {
 338                 dfn=0;
 339                 afs=1;
 340         } else if (symbol_rate < (u32) (SACLK * 0.3333)) {
 341                 dfn=0;
 342                 afs=0;
 343         } else {
 344                 reg37 = 0x63;
 345                 reg42 = 0x4f;
 346                 byp=1;
 347         }
 348
 349         /* calculate BDR */
 350         big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);
 351         big += ((SACLK/1000ULL)-1ULL);
 352         do_div(big, (SACLK/1000ULL));
 353         bdr = big & 0xfffff;
 354
 355         /* calculate BDRI */
 356         tmp = (1<<dfn)*(symbol_rate/1000);
 357         bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;
 358
 359         tda10086_write_byte(state, 0x21, (afs << 7) | dfn);
 360         tda10086_write_mask(state, 0x20, 0x08, byp << 3);
 361         tda10086_write_byte(state, 0x06, bdr);
 362         tda10086_write_byte(state, 0x07, bdr >> 8);
 363         tda10086_write_byte(state, 0x08, bdr >> 16);
 364         tda10086_write_byte(state, 0x09, bdri);
 365         tda10086_write_byte(state, 0x37, reg37);
 366         tda10086_write_byte(state, 0x42, reg42);
 367
 368         return 0;
 369 }
 370
 371 static int tda10086_set_fec(struct tda10086_state *state,
 372                             struct dtv_frontend_properties *fe_params)
 373 {
 374         u8 fecval;
 375
 376         dprintk("%s %i\n", __func__, fe_params->fec_inner);
 377
 378         switch (fe_params->fec_inner) {
 379         case FEC_1_2:
 380                 fecval = 0x00;
 381                 break;
 382         case FEC_2_3:
 383                 fecval = 0x01;
 384                 break;
 385         case FEC_3_4:
 386                 fecval = 0x02;
 387                 break;
 388         case FEC_4_5:
 389                 fecval = 0x03;
 390                 break;
 391         case FEC_5_6:
 392                 fecval = 0x04;
 393                 break;
 394         case FEC_6_7:
 395                 fecval = 0x05;
 396                 break;
 397         case FEC_7_8:
 398                 fecval = 0x06;
 399                 break;
 400         case FEC_8_9:
 401                 fecval = 0x07;
 402                 break;
 403         case FEC_AUTO:
 404                 fecval = 0x08;
 405                 break;
 406         default:
 407                 return -1;
 408         }
 409         tda10086_write_byte(state, 0x0d, fecval);
 410
 411         return 0;
 412 }
 413
 414 static int tda10086_set_frontend(struct dvb_frontend *fe)
 415 {
 416         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 417         struct tda10086_state *state = fe->demodulator_priv;
 418         int ret;
 419         u32 freq = 0;
 420         int freqoff;
 421
 422         dprintk ("%s\n", __func__);
 423
 424         /* modify parameters for tuning */
 425         tda10086_write_byte(state, 0x02, 0x35);
 426         state->has_lock = false;
 427
 428         /* set params */
 429         if (fe->ops.tuner_ops.set_params) {
 430                 fe->ops.tuner_ops.set_params(fe);
 431                 if (fe->ops.i2c_gate_ctrl)
 432                         fe->ops.i2c_gate_ctrl(fe, 0);
 433
 434                 if (fe->ops.tuner_ops.get_frequency)
 435                         fe->ops.tuner_ops.get_frequency(fe, &freq);
 436                 if (fe->ops.i2c_gate_ctrl)
 437                         fe->ops.i2c_gate_ctrl(fe, 0);
 438         }
 439
 440         /* calcluate the frequency offset (in *Hz* not kHz) */
 441         freqoff = fe_params->frequency - freq;
 442         freqoff = ((1<<16) * freqoff) / (SACLK/1000);
 443         tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));
 444         tda10086_write_byte(state, 0x3e, freqoff);
 445
 446         if ((ret = tda10086_set_inversion(state, fe_params)) < 0)
 447                 return ret;
 448         if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)
 449                 return ret;
 450         if ((ret = tda10086_set_fec(state, fe_params)) < 0)
 451                 return ret;
 452
 453         /* soft reset + disable TS output until lock */
 454         tda10086_write_mask(state, 0x10, 0x40, 0x40);
 455         tda10086_write_mask(state, 0x00, 0x01, 0x00);
 456
 457         state->symbol_rate = fe_params->symbol_rate;
 458         state->frequency = fe_params->frequency;
 459         return 0;
 460 }
 461
 462 static int tda10086_get_frontend(struct dvb_frontend *fe)
 463 {
 464         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 465         struct tda10086_state* state = fe->demodulator_priv;
 466         u8 val;
 467         int tmp;
 468         u64 tmp64;
 469
 470         dprintk ("%s\n", __func__);
 471
 472         /* check for invalid symbol rate */
 473         if (fe_params->symbol_rate < 500000)
 474                 return -EINVAL;
 475
 476         /* calculate the updated frequency (note: we convert from Hz->kHz) */
 477         tmp64 = ((u64)tda10086_read_byte(state, 0x52)
 478                 | (tda10086_read_byte(state, 0x51) << 8));
 479         if (tmp64 & 0x8000)
 480                 tmp64 |= 0xffffffffffff0000ULL;
 481         tmp64 = (tmp64 * (SACLK/1000ULL));
 482         do_div(tmp64, (1ULL<<15) * (1ULL<<1));
 483         fe_params->frequency = (int) state->frequency + (int) tmp64;
 484
 485         /* the inversion */
 486         val = tda10086_read_byte(state, 0x0c);
 487         if (val & 0x80) {
 488                 switch(val & 0x40) {
 489                 case 0x00:
 490                         fe_params->inversion = INVERSION_OFF;
 491                         if (state->config->invert)
 492                                 fe_params->inversion = INVERSION_ON;
 493                         break;
 494                 default:
 495                         fe_params->inversion = INVERSION_ON;
 496                         if (state->config->invert)
 497                                 fe_params->inversion = INVERSION_OFF;
 498                         break;
 499                 }
 500         } else {
 501                 tda10086_read_byte(state, 0x0f);
 502                 switch(val & 0x02) {
 503                 case 0x00:
 504                         fe_params->inversion = INVERSION_OFF;
 505                         if (state->config->invert)
 506                                 fe_params->inversion = INVERSION_ON;
 507                         break;
 508                 default:
 509                         fe_params->inversion = INVERSION_ON;
 510                         if (state->config->invert)
 511                                 fe_params->inversion = INVERSION_OFF;
 512                         break;
 513                 }
 514         }
 515
 516         /* calculate the updated symbol rate */
 517         tmp = tda10086_read_byte(state, 0x1d);
 518         if (tmp & 0x80)
 519                 tmp |= 0xffffff00;
 520         tmp = (tmp * 480 * (1<<1)) / 128;
 521         tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);
 522         fe_params->symbol_rate = state->symbol_rate + tmp;
 523
 524         /* the FEC */
 525         val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;
 526         switch(val) {
 527         case 0x00:
 528                 fe_params->fec_inner = FEC_1_2;
 529                 break;
 530         case 0x01:
 531                 fe_params->fec_inner = FEC_2_3;
 532                 break;
 533         case 0x02:
 534                 fe_params->fec_inner = FEC_3_4;
 535                 break;
 536         case 0x03:
 537                 fe_params->fec_inner = FEC_4_5;
 538                 break;
 539         case 0x04:
 540                 fe_params->fec_inner = FEC_5_6;
 541                 break;
 542         case 0x05:
 543                 fe_params->fec_inner = FEC_6_7;
 544                 break;
 545         case 0x06:
 546                 fe_params->fec_inner = FEC_7_8;
 547                 break;
 548         case 0x07:
 549                 fe_params->fec_inner = FEC_8_9;
 550                 break;
 551         }
 552
 553         return 0;
 554 }
 555
 556 static int tda10086_read_status(struct dvb_frontend *fe,
 557                                 enum fe_status *fe_status)
 558 {
 559         struct tda10086_state* state = fe->demodulator_priv;
 560         u8 val;
 561
 562         dprintk ("%s\n", __func__);
 563
 564         val = tda10086_read_byte(state, 0x0e);
 565         *fe_status = 0;
 566         if (val & 0x01)
 567                 *fe_status |= FE_HAS_SIGNAL;
 568         if (val & 0x02)
 569                 *fe_status |= FE_HAS_CARRIER;
 570         if (val & 0x04)
 571                 *fe_status |= FE_HAS_VITERBI;
 572         if (val & 0x08)
 573                 *fe_status |= FE_HAS_SYNC;
 574         if (val & 0x10) {
 575                 *fe_status |= FE_HAS_LOCK;
 576                 if (!state->has_lock) {
 577                         state->has_lock = true;
 578                         /* modify parameters for stable reception */
 579                         tda10086_write_byte(state, 0x02, 0x00);
 580                 }
 581         }
 582
 583         return 0;
 584 }
 585
 586 static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)
 587 {
 588         struct tda10086_state* state = fe->demodulator_priv;
 589         u8 _str;
 590
 591         dprintk ("%s\n", __func__);
 592
 593         _str = 0xff - tda10086_read_byte(state, 0x43);
 594         *signal = (_str << 8) | _str;
 595
 596         return 0;
 597 }
 598
 599 static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)
 600 {
 601         struct tda10086_state* state = fe->demodulator_priv;
 602         u8 _snr;
 603
 604         dprintk ("%s\n", __func__);
 605
 606         _snr = 0xff - tda10086_read_byte(state, 0x1c);
 607         *snr = (_snr << 8) | _snr;
 608
 609         return 0;
 610 }
 611
 612 static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 613 {
 614         struct tda10086_state* state = fe->demodulator_priv;
 615
 616         dprintk ("%s\n", __func__);
 617
 618         /* read it */
 619         *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;
 620
 621         /* reset counter */
 622         tda10086_write_byte(state, 0x18, 0x00);
 623         tda10086_write_byte(state, 0x18, 0x80);
 624
 625         return 0;
 626 }
 627
 628 static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)
 629 {
 630         struct tda10086_state* state = fe->demodulator_priv;
 631
 632         dprintk ("%s\n", __func__);
 633
 634         /* read it */
 635         *ber = 0;
 636         *ber |= tda10086_read_byte(state, 0x15);
 637         *ber |= tda10086_read_byte(state, 0x16) << 8;
 638         *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;
 639
 640         return 0;
 641 }
 642
 643 static int tda10086_sleep(struct dvb_frontend* fe)
 644 {
 645         struct tda10086_state* state = fe->demodulator_priv;
 646
 647         dprintk ("%s\n", __func__);
 648
 649         tda10086_write_mask(state, 0x00, 0x08, 0x08);
 650
 651         return 0;
 652 }
 653
 654 static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 655 {
 656         struct tda10086_state* state = fe->demodulator_priv;
 657
 658         dprintk ("%s\n", __func__);
 659
 660         if (enable) {
 661                 tda10086_write_mask(state, 0x00, 0x10, 0x10);
 662         } else {
 663                 tda10086_write_mask(state, 0x00, 0x10, 0x00);
 664         }
 665
 666         return 0;
 667 }
 668
 669 static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 670 {
 671         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 672
 673         if (p->symbol_rate > 20000000) {
 674                 fesettings->min_delay_ms = 50;
 675                 fesettings->step_size = 2000;
 676                 fesettings->max_drift = 8000;
 677         } else if (p->symbol_rate > 12000000) {
 678                 fesettings->min_delay_ms = 100;
 679                 fesettings->step_size = 1500;
 680                 fesettings->max_drift = 9000;
 681         } else if (p->symbol_rate > 8000000) {
 682                 fesettings->min_delay_ms = 100;
 683                 fesettings->step_size = 1000;
 684                 fesettings->max_drift = 8000;
 685         } else if (p->symbol_rate > 4000000) {
 686                 fesettings->min_delay_ms = 100;
 687                 fesettings->step_size = 500;
 688                 fesettings->max_drift = 7000;
 689         } else if (p->symbol_rate > 2000000) {
 690                 fesettings->min_delay_ms = 200;
 691                 fesettings->step_size = p->symbol_rate / 8000;
 692                 fesettings->max_drift = 14 * fesettings->step_size;
 693         } else {
 694                 fesettings->min_delay_ms = 200;
 695                 fesettings->step_size =  p->symbol_rate / 8000;
 696                 fesettings->max_drift = 18 * fesettings->step_size;
 697         }
 698
 699         return 0;
 700 }
 701
 702 static void tda10086_release(struct dvb_frontend* fe)
 703 {
 704         struct tda10086_state *state = fe->demodulator_priv;
 705         tda10086_sleep(fe);
 706         kfree(state);
 707 }
 708
 709 static struct dvb_frontend_ops tda10086_ops = {
 710         .delsys = { SYS_DVBS },
 711         .info = {
 712                 .name     = "Philips TDA10086 DVB-S",
 713                 .frequency_min    = 950000,
 714                 .frequency_max    = 2150000,
 715                 .frequency_stepsize = 125,     /* kHz for QPSK frontends */
 716                 .symbol_rate_min  = 1000000,
 717                 .symbol_rate_max  = 45000000,
 718                 .caps = FE_CAN_INVERSION_AUTO |
 719                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 720                         FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 721                         FE_CAN_QPSK
 722         },
 723
 724         .release = tda10086_release,
 725
 726         .init = tda10086_init,
 727         .sleep = tda10086_sleep,
 728         .i2c_gate_ctrl = tda10086_i2c_gate_ctrl,
 729
 730         .set_frontend = tda10086_set_frontend,
 731         .get_frontend = tda10086_get_frontend,
 732         .get_tune_settings = tda10086_get_tune_settings,
 733
 734         .read_status = tda10086_read_status,
 735         .read_ber = tda10086_read_ber,
 736         .read_signal_strength = tda10086_read_signal_strength,
 737         .read_snr = tda10086_read_snr,
 738         .read_ucblocks = tda10086_read_ucblocks,
 739
 740         .diseqc_send_master_cmd = tda10086_send_master_cmd,
 741         .diseqc_send_burst = tda10086_send_burst,
 742         .set_tone = tda10086_set_tone,
 743 };
 744
 745 struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,
 746                                      struct i2c_adapter* i2c)
 747 {
 748         struct tda10086_state *state;
 749
 750         dprintk ("%s\n", __func__);
 751
 752         /* allocate memory for the internal state */
 753         state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL);
 754         if (!state)
 755                 return NULL;
 756
 757         /* setup the state */
 758         state->config = config;
 759         state->i2c = i2c;
 760
 761         /* check if the demod is there */
 762         if (tda10086_read_byte(state, 0x1e) != 0xe1) {
 763                 kfree(state);
 764                 return NULL;
 765         }
 766
 767         /* create dvb_frontend */
 768         memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));
 769         state->frontend.demodulator_priv = state;
 770         return &state->frontend;
 771 }
 772
 773 module_param(debug, int, 0644);
 774 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 775
 776 MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");
 777 MODULE_AUTHOR("Andrew de Quincey");
 778 MODULE_LICENSE("GPL");
 779
 780 EXPORT_SYMBOL(tda10086_attach);