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, fe_sec_tone_mode_t tone)
 189 {
 190         struct tda10086_state* state = fe->demodulator_priv;
 191         u8 t22k_off = 0x80;
 192
 193         dprintk ("%s\n", __func__);
 194
 195         if (state->config->diseqc_tone)
 196                 t22k_off = 0;
 197
 198         switch (tone) {
 199         case SEC_TONE_OFF:
 200                 tda10086_write_byte(state, 0x36, t22k_off);
 201                 break;
 202
 203         case SEC_TONE_ON:
 204                 tda10086_write_byte(state, 0x36, 0x01 + t22k_off);
 205                 break;
 206         }
 207
 208         return 0;
 209 }
 210
 211 static int tda10086_send_master_cmd (struct dvb_frontend* fe,
 212                                     struct dvb_diseqc_master_cmd* cmd)
 213 {
 214         struct tda10086_state* state = fe->demodulator_priv;
 215         int i;
 216         u8 oldval;
 217         u8 t22k_off = 0x80;
 218
 219         dprintk ("%s\n", __func__);
 220
 221         if (state->config->diseqc_tone)
 222                 t22k_off = 0;
 223
 224         if (cmd->msg_len > 6)
 225                 return -EINVAL;
 226         oldval = tda10086_read_byte(state, 0x36);
 227
 228         for(i=0; i< cmd->msg_len; i++) {
 229                 tda10086_write_byte(state, 0x48+i, cmd->msg[i]);
 230         }
 231         tda10086_write_byte(state, 0x36, (0x08 + t22k_off)
 232                                         | ((cmd->msg_len - 1) << 4));
 233
 234         tda10086_diseqc_wait(state);
 235
 236         tda10086_write_byte(state, 0x36, oldval);
 237
 238         return 0;
 239 }
 240
 241 static int tda10086_send_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
 242 {
 243         struct tda10086_state* state = fe->demodulator_priv;
 244         u8 oldval = tda10086_read_byte(state, 0x36);
 245         u8 t22k_off = 0x80;
 246
 247         dprintk ("%s\n", __func__);
 248
 249         if (state->config->diseqc_tone)
 250                 t22k_off = 0;
 251
 252         switch(minicmd) {
 253         case SEC_MINI_A:
 254                 tda10086_write_byte(state, 0x36, 0x04 + t22k_off);
 255                 break;
 256
 257         case SEC_MINI_B:
 258                 tda10086_write_byte(state, 0x36, 0x06 + t22k_off);
 259                 break;
 260         }
 261
 262         tda10086_diseqc_wait(state);
 263
 264         tda10086_write_byte(state, 0x36, oldval);
 265
 266         return 0;
 267 }
 268
 269 static int tda10086_set_inversion(struct tda10086_state *state,
 270                                   struct dvb_frontend_parameters *fe_params)
 271 {
 272         u8 invval = 0x80;
 273
 274         dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert);
 275
 276         switch(fe_params->inversion) {
 277         case INVERSION_OFF:
 278                 if (state->config->invert)
 279                         invval = 0x40;
 280                 break;
 281         case INVERSION_ON:
 282                 if (!state->config->invert)
 283                         invval = 0x40;
 284                 break;
 285         case INVERSION_AUTO:
 286                 invval = 0x00;
 287                 break;
 288         }
 289         tda10086_write_mask(state, 0x0c, 0xc0, invval);
 290
 291         return 0;
 292 }
 293
 294 static int tda10086_set_symbol_rate(struct tda10086_state *state,
 295                                     struct dvb_frontend_parameters *fe_params)
 296 {
 297         u8 dfn = 0;
 298         u8 afs = 0;
 299         u8 byp = 0;
 300         u8 reg37 = 0x43;
 301         u8 reg42 = 0x43;
 302         u64 big;
 303         u32 tmp;
 304         u32 bdr;
 305         u32 bdri;
 306         u32 symbol_rate = fe_params->u.qpsk.symbol_rate;
 307
 308         dprintk ("%s %i\n", __func__, symbol_rate);
 309
 310         /* setup the decimation and anti-aliasing filters.. */
 311         if (symbol_rate < (u32) (SACLK * 0.0137)) {
 312                 dfn=4;
 313                 afs=1;
 314         } else if (symbol_rate < (u32) (SACLK * 0.0208)) {
 315                 dfn=4;
 316                 afs=0;
 317         } else if (symbol_rate < (u32) (SACLK * 0.0270)) {
 318                 dfn=3;
 319                 afs=1;
 320         } else if (symbol_rate < (u32) (SACLK * 0.0416)) {
 321                 dfn=3;
 322                 afs=0;
 323         } else if (symbol_rate < (u32) (SACLK * 0.0550)) {
 324                 dfn=2;
 325                 afs=1;
 326         } else if (symbol_rate < (u32) (SACLK * 0.0833)) {
 327                 dfn=2;
 328                 afs=0;
 329         } else if (symbol_rate < (u32) (SACLK * 0.1100)) {
 330                 dfn=1;
 331                 afs=1;
 332         } else if (symbol_rate < (u32) (SACLK * 0.1666)) {
 333                 dfn=1;
 334                 afs=0;
 335         } else if (symbol_rate < (u32) (SACLK * 0.2200)) {
 336                 dfn=0;
 337                 afs=1;
 338         } else if (symbol_rate < (u32) (SACLK * 0.3333)) {
 339                 dfn=0;
 340                 afs=0;
 341         } else {
 342                 reg37 = 0x63;
 343                 reg42 = 0x4f;
 344                 byp=1;
 345         }
 346
 347         /* calculate BDR */
 348         big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);
 349         big += ((SACLK/1000ULL)-1ULL);
 350         do_div(big, (SACLK/1000ULL));
 351         bdr = big & 0xfffff;
 352
 353         /* calculate BDRI */
 354         tmp = (1<<dfn)*(symbol_rate/1000);
 355         bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;
 356
 357         tda10086_write_byte(state, 0x21, (afs << 7) | dfn);
 358         tda10086_write_mask(state, 0x20, 0x08, byp << 3);
 359         tda10086_write_byte(state, 0x06, bdr);
 360         tda10086_write_byte(state, 0x07, bdr >> 8);
 361         tda10086_write_byte(state, 0x08, bdr >> 16);
 362         tda10086_write_byte(state, 0x09, bdri);
 363         tda10086_write_byte(state, 0x37, reg37);
 364         tda10086_write_byte(state, 0x42, reg42);
 365
 366         return 0;
 367 }
 368
 369 static int tda10086_set_fec(struct tda10086_state *state,
 370                             struct dvb_frontend_parameters *fe_params)
 371 {
 372         u8 fecval;
 373
 374         dprintk ("%s %i\n", __func__, fe_params->u.qpsk.fec_inner);
 375
 376         switch(fe_params->u.qpsk.fec_inner) {
 377         case FEC_1_2:
 378                 fecval = 0x00;
 379                 break;
 380         case FEC_2_3:
 381                 fecval = 0x01;
 382                 break;
 383         case FEC_3_4:
 384                 fecval = 0x02;
 385                 break;
 386         case FEC_4_5:
 387                 fecval = 0x03;
 388                 break;
 389         case FEC_5_6:
 390                 fecval = 0x04;
 391                 break;
 392         case FEC_6_7:
 393                 fecval = 0x05;
 394                 break;
 395         case FEC_7_8:
 396                 fecval = 0x06;
 397                 break;
 398         case FEC_8_9:
 399                 fecval = 0x07;
 400                 break;
 401         case FEC_AUTO:
 402                 fecval = 0x08;
 403                 break;
 404         default:
 405                 return -1;
 406         }
 407         tda10086_write_byte(state, 0x0d, fecval);
 408
 409         return 0;
 410 }
 411
 412 static int tda10086_set_frontend(struct dvb_frontend* fe,
 413                                  struct dvb_frontend_parameters *fe_params)
 414 {
 415         struct tda10086_state *state = fe->demodulator_priv;
 416         int ret;
 417         u32 freq = 0;
 418         int freqoff;
 419
 420         dprintk ("%s\n", __func__);
 421
 422         /* modify parameters for tuning */
 423         tda10086_write_byte(state, 0x02, 0x35);
 424         state->has_lock = false;
 425
 426         /* set params */
 427         if (fe->ops.tuner_ops.set_params) {
 428                 fe->ops.tuner_ops.set_params(fe, fe_params);
 429                 if (fe->ops.i2c_gate_ctrl)
 430                         fe->ops.i2c_gate_ctrl(fe, 0);
 431
 432                 if (fe->ops.tuner_ops.get_frequency)
 433                         fe->ops.tuner_ops.get_frequency(fe, &freq);
 434                 if (fe->ops.i2c_gate_ctrl)
 435                         fe->ops.i2c_gate_ctrl(fe, 0);
 436         }
 437
 438         /* calcluate the frequency offset (in *Hz* not kHz) */
 439         freqoff = fe_params->frequency - freq;
 440         freqoff = ((1<<16) * freqoff) / (SACLK/1000);
 441         tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));
 442         tda10086_write_byte(state, 0x3e, freqoff);
 443
 444         if ((ret = tda10086_set_inversion(state, fe_params)) < 0)
 445                 return ret;
 446         if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)
 447                 return ret;
 448         if ((ret = tda10086_set_fec(state, fe_params)) < 0)
 449                 return ret;
 450
 451         /* soft reset + disable TS output until lock */
 452         tda10086_write_mask(state, 0x10, 0x40, 0x40);
 453         tda10086_write_mask(state, 0x00, 0x01, 0x00);
 454
 455         state->symbol_rate = fe_params->u.qpsk.symbol_rate;
 456         state->frequency = fe_params->frequency;
 457         return 0;
 458 }
 459
 460 static int tda10086_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *fe_params)
 461 {
 462         struct tda10086_state* state = fe->demodulator_priv;
 463         u8 val;
 464         int tmp;
 465         u64 tmp64;
 466
 467         dprintk ("%s\n", __func__);
 468
 469         /* check for invalid symbol rate */
 470         if (fe_params->u.qpsk.symbol_rate < 500000)
 471                 return -EINVAL;
 472
 473         /* calculate the updated frequency (note: we convert from Hz->kHz) */
 474         tmp64 = tda10086_read_byte(state, 0x52);
 475         tmp64 |= (tda10086_read_byte(state, 0x51) << 8);
 476         if (tmp64 & 0x8000)
 477                 tmp64 |= 0xffffffffffff0000ULL;
 478         tmp64 = (tmp64 * (SACLK/1000ULL));
 479         do_div(tmp64, (1ULL<<15) * (1ULL<<1));
 480         fe_params->frequency = (int) state->frequency + (int) tmp64;
 481
 482         /* the inversion */
 483         val = tda10086_read_byte(state, 0x0c);
 484         if (val & 0x80) {
 485                 switch(val & 0x40) {
 486                 case 0x00:
 487                         fe_params->inversion = INVERSION_OFF;
 488                         if (state->config->invert)
 489                                 fe_params->inversion = INVERSION_ON;
 490                         break;
 491                 default:
 492                         fe_params->inversion = INVERSION_ON;
 493                         if (state->config->invert)
 494                                 fe_params->inversion = INVERSION_OFF;
 495                         break;
 496                 }
 497         } else {
 498                 tda10086_read_byte(state, 0x0f);
 499                 switch(val & 0x02) {
 500                 case 0x00:
 501                         fe_params->inversion = INVERSION_OFF;
 502                         if (state->config->invert)
 503                                 fe_params->inversion = INVERSION_ON;
 504                         break;
 505                 default:
 506                         fe_params->inversion = INVERSION_ON;
 507                         if (state->config->invert)
 508                                 fe_params->inversion = INVERSION_OFF;
 509                         break;
 510                 }
 511         }
 512
 513         /* calculate the updated symbol rate */
 514         tmp = tda10086_read_byte(state, 0x1d);
 515         if (tmp & 0x80)
 516                 tmp |= 0xffffff00;
 517         tmp = (tmp * 480 * (1<<1)) / 128;
 518         tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);
 519         fe_params->u.qpsk.symbol_rate = state->symbol_rate + tmp;
 520
 521         /* the FEC */
 522         val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;
 523         switch(val) {
 524         case 0x00:
 525                 fe_params->u.qpsk.fec_inner = FEC_1_2;
 526                 break;
 527         case 0x01:
 528                 fe_params->u.qpsk.fec_inner = FEC_2_3;
 529                 break;
 530         case 0x02:
 531                 fe_params->u.qpsk.fec_inner = FEC_3_4;
 532                 break;
 533         case 0x03:
 534                 fe_params->u.qpsk.fec_inner = FEC_4_5;
 535                 break;
 536         case 0x04:
 537                 fe_params->u.qpsk.fec_inner = FEC_5_6;
 538                 break;
 539         case 0x05:
 540                 fe_params->u.qpsk.fec_inner = FEC_6_7;
 541                 break;
 542         case 0x06:
 543                 fe_params->u.qpsk.fec_inner = FEC_7_8;
 544                 break;
 545         case 0x07:
 546                 fe_params->u.qpsk.fec_inner = FEC_8_9;
 547                 break;
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int tda10086_read_status(struct dvb_frontend* fe, fe_status_t *fe_status)
 554 {
 555         struct tda10086_state* state = fe->demodulator_priv;
 556         u8 val;
 557
 558         dprintk ("%s\n", __func__);
 559
 560         val = tda10086_read_byte(state, 0x0e);
 561         *fe_status = 0;
 562         if (val & 0x01)
 563                 *fe_status |= FE_HAS_SIGNAL;
 564         if (val & 0x02)
 565                 *fe_status |= FE_HAS_CARRIER;
 566         if (val & 0x04)
 567                 *fe_status |= FE_HAS_VITERBI;
 568         if (val & 0x08)
 569                 *fe_status |= FE_HAS_SYNC;
 570         if (val & 0x10) {
 571                 *fe_status |= FE_HAS_LOCK;
 572                 if (!state->has_lock) {
 573                         state->has_lock = true;
 574                         /* modify parameters for stable reception */
 575                         tda10086_write_byte(state, 0x02, 0x00);
 576                 }
 577         }
 578
 579         return 0;
 580 }
 581
 582 static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)
 583 {
 584         struct tda10086_state* state = fe->demodulator_priv;
 585         u8 _str;
 586
 587         dprintk ("%s\n", __func__);
 588
 589         _str = 0xff - tda10086_read_byte(state, 0x43);
 590         *signal = (_str << 8) | _str;
 591
 592         return 0;
 593 }
 594
 595 static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)
 596 {
 597         struct tda10086_state* state = fe->demodulator_priv;
 598         u8 _snr;
 599
 600         dprintk ("%s\n", __func__);
 601
 602         _snr = 0xff - tda10086_read_byte(state, 0x1c);
 603         *snr = (_snr << 8) | _snr;
 604
 605         return 0;
 606 }
 607
 608 static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 609 {
 610         struct tda10086_state* state = fe->demodulator_priv;
 611
 612         dprintk ("%s\n", __func__);
 613
 614         /* read it */
 615         *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;
 616
 617         /* reset counter */
 618         tda10086_write_byte(state, 0x18, 0x00);
 619         tda10086_write_byte(state, 0x18, 0x80);
 620
 621         return 0;
 622 }
 623
 624 static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)
 625 {
 626         struct tda10086_state* state = fe->demodulator_priv;
 627
 628         dprintk ("%s\n", __func__);
 629
 630         /* read it */
 631         *ber = 0;
 632         *ber |= tda10086_read_byte(state, 0x15);
 633         *ber |= tda10086_read_byte(state, 0x16) << 8;
 634         *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;
 635
 636         return 0;
 637 }
 638
 639 static int tda10086_sleep(struct dvb_frontend* fe)
 640 {
 641         struct tda10086_state* state = fe->demodulator_priv;
 642
 643         dprintk ("%s\n", __func__);
 644
 645         tda10086_write_mask(state, 0x00, 0x08, 0x08);
 646
 647         return 0;
 648 }
 649
 650 static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 651 {
 652         struct tda10086_state* state = fe->demodulator_priv;
 653
 654         dprintk ("%s\n", __func__);
 655
 656         if (enable) {
 657                 tda10086_write_mask(state, 0x00, 0x10, 0x10);
 658         } else {
 659                 tda10086_write_mask(state, 0x00, 0x10, 0x00);
 660         }
 661
 662         return 0;
 663 }
 664
 665 static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 666 {
 667         if (fesettings->parameters.u.qpsk.symbol_rate > 20000000) {
 668                 fesettings->min_delay_ms = 50;
 669                 fesettings->step_size = 2000;
 670                 fesettings->max_drift = 8000;
 671         } else if (fesettings->parameters.u.qpsk.symbol_rate > 12000000) {
 672                 fesettings->min_delay_ms = 100;
 673                 fesettings->step_size = 1500;
 674                 fesettings->max_drift = 9000;
 675         } else if (fesettings->parameters.u.qpsk.symbol_rate > 8000000) {
 676                 fesettings->min_delay_ms = 100;
 677                 fesettings->step_size = 1000;
 678                 fesettings->max_drift = 8000;
 679         } else if (fesettings->parameters.u.qpsk.symbol_rate > 4000000) {
 680                 fesettings->min_delay_ms = 100;
 681                 fesettings->step_size = 500;
 682                 fesettings->max_drift = 7000;
 683         } else if (fesettings->parameters.u.qpsk.symbol_rate > 2000000) {
 684                 fesettings->min_delay_ms = 200;
 685                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
 686                 fesettings->max_drift = 14 * fesettings->step_size;
 687         } else {
 688                 fesettings->min_delay_ms = 200;
 689                 fesettings->step_size = (fesettings->parameters.u.qpsk.symbol_rate / 8000);
 690                 fesettings->max_drift = 18 * fesettings->step_size;
 691         }
 692
 693         return 0;
 694 }
 695
 696 static void tda10086_release(struct dvb_frontend* fe)
 697 {
 698         struct tda10086_state *state = fe->demodulator_priv;
 699         tda10086_sleep(fe);
 700         kfree(state);
 701 }
 702
 703 static struct dvb_frontend_ops tda10086_ops = {
 704
 705         .info = {
 706                 .name     = "Philips TDA10086 DVB-S",
 707                 .type     = FE_QPSK,
 708                 .frequency_min    = 950000,
 709                 .frequency_max    = 2150000,
 710                 .frequency_stepsize = 125,     /* kHz for QPSK frontends */
 711                 .symbol_rate_min  = 1000000,
 712                 .symbol_rate_max  = 45000000,
 713                 .caps = FE_CAN_INVERSION_AUTO |
 714                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 715                         FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 716                         FE_CAN_QPSK
 717         },
 718
 719         .release = tda10086_release,
 720
 721         .init = tda10086_init,
 722         .sleep = tda10086_sleep,
 723         .i2c_gate_ctrl = tda10086_i2c_gate_ctrl,
 724
 725         .set_frontend = tda10086_set_frontend,
 726         .get_frontend = tda10086_get_frontend,
 727         .get_tune_settings = tda10086_get_tune_settings,
 728
 729         .read_status = tda10086_read_status,
 730         .read_ber = tda10086_read_ber,
 731         .read_signal_strength = tda10086_read_signal_strength,
 732         .read_snr = tda10086_read_snr,
 733         .read_ucblocks = tda10086_read_ucblocks,
 734
 735         .diseqc_send_master_cmd = tda10086_send_master_cmd,
 736         .diseqc_send_burst = tda10086_send_burst,
 737         .set_tone = tda10086_set_tone,
 738 };
 739
 740 struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,
 741                                      struct i2c_adapter* i2c)
 742 {
 743         struct tda10086_state *state;
 744
 745         dprintk ("%s\n", __func__);
 746
 747         /* allocate memory for the internal state */
 748         state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL);
 749         if (!state)
 750                 return NULL;
 751
 752         /* setup the state */
 753         state->config = config;
 754         state->i2c = i2c;
 755
 756         /* check if the demod is there */
 757         if (tda10086_read_byte(state, 0x1e) != 0xe1) {
 758                 kfree(state);
 759                 return NULL;
 760         }
 761
 762         /* create dvb_frontend */
 763         memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));
 764         state->frontend.demodulator_priv = state;
 765         return &state->frontend;
 766 }
 767
 768 module_param(debug, int, 0644);
 769 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 770
 771 MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");
 772 MODULE_AUTHOR("Andrew de Quincey");
 773 MODULE_LICENSE("GPL");
 774
 775 EXPORT_SYMBOL(tda10086_attach);