drivers/media/dvb-frontends/dib3000mc.c

   1 /*
   2  * Driver for DiBcom DiB3000MC/P-demodulator.
   3  *
   4  * Copyright (C) 2004-7 DiBcom (http://www.dibcom.fr/)
   5  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
   6  *
   7  * This code is partially based on the previous dib3000mc.c .
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License as
  11  *      published by the Free Software Foundation, version 2.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/slab.h>
  16 #include <linux/i2c.h>
  17
  18 #include "dvb_frontend.h"
  19
  20 #include "dib3000mc.h"
  21
  22 static int debug;
  23 module_param(debug, int, 0644);
  24 MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
  25
  26 static int buggy_sfn_workaround;
  27 module_param(buggy_sfn_workaround, int, 0644);
  28 MODULE_PARM_DESC(buggy_sfn_workaround, "Enable work-around for buggy SFNs (default: 0)");
  29
  30 #define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiB3000MC/P:"); printk(args); printk("\n"); } } while (0)
  31
  32 struct dib3000mc_state {
  33         struct dvb_frontend demod;
  34         struct dib3000mc_config *cfg;
  35
  36         u8 i2c_addr;
  37         struct i2c_adapter *i2c_adap;
  38
  39         struct dibx000_i2c_master i2c_master;
  40
  41         u32 timf;
  42
  43         u32 current_bandwidth;
  44
  45         u16 dev_id;
  46
  47         u8 sfn_workaround_active :1;
  48 };
  49
  50 static u16 dib3000mc_read_word(struct dib3000mc_state *state, u16 reg)
  51 {
  52         u8 wb[2] = { (reg >> 8) | 0x80, reg & 0xff };
  53         u8 rb[2];
  54         struct i2c_msg msg[2] = {
  55                 { .addr = state->i2c_addr >> 1, .flags = 0,        .buf = wb, .len = 2 },
  56                 { .addr = state->i2c_addr >> 1, .flags = I2C_M_RD, .buf = rb, .len = 2 },
  57         };
  58
  59         if (i2c_transfer(state->i2c_adap, msg, 2) != 2)
  60                 dprintk("i2c read error on %d\n",reg);
  61
  62         return (rb[0] << 8) | rb[1];
  63 }
  64
  65 static int dib3000mc_write_word(struct dib3000mc_state *state, u16 reg, u16 val)
  66 {
  67         u8 b[4] = {
  68                 (reg >> 8) & 0xff, reg & 0xff,
  69                 (val >> 8) & 0xff, val & 0xff,
  70         };
  71         struct i2c_msg msg = {
  72                 .addr = state->i2c_addr >> 1, .flags = 0, .buf = b, .len = 4
  73         };
  74         return i2c_transfer(state->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
  75 }
  76
  77 static int dib3000mc_identify(struct dib3000mc_state *state)
  78 {
  79         u16 value;
  80         if ((value = dib3000mc_read_word(state, 1025)) != 0x01b3) {
  81                 dprintk("-E-  DiB3000MC/P: wrong Vendor ID (read=0x%x)\n",value);
  82                 return -EREMOTEIO;
  83         }
  84
  85         value = dib3000mc_read_word(state, 1026);
  86         if (value != 0x3001 && value != 0x3002) {
  87                 dprintk("-E-  DiB3000MC/P: wrong Device ID (%x)\n",value);
  88                 return -EREMOTEIO;
  89         }
  90         state->dev_id = value;
  91
  92         dprintk("-I-  found DiB3000MC/P: %x\n",state->dev_id);
  93
  94         return 0;
  95 }
  96
  97 static int dib3000mc_set_timing(struct dib3000mc_state *state, s16 nfft, u32 bw, u8 update_offset)
  98 {
  99         u32 timf;
 100
 101         if (state->timf == 0) {
 102                 timf = 1384402; // default value for 8MHz
 103                 if (update_offset)
 104                         msleep(200); // first time we do an update
 105         } else
 106                 timf = state->timf;
 107
 108         timf *= (bw / 1000);
 109
 110         if (update_offset) {
 111                 s16 tim_offs = dib3000mc_read_word(state, 416);
 112
 113                 if (tim_offs &  0x2000)
 114                         tim_offs -= 0x4000;
 115
 116                 if (nfft == TRANSMISSION_MODE_2K)
 117                         tim_offs *= 4;
 118
 119                 timf += tim_offs;
 120                 state->timf = timf / (bw / 1000);
 121         }
 122
 123         dprintk("timf: %d\n", timf);
 124
 125         dib3000mc_write_word(state, 23, (u16) (timf >> 16));
 126         dib3000mc_write_word(state, 24, (u16) (timf      ) & 0xffff);
 127
 128         return 0;
 129 }
 130
 131 static int dib3000mc_setup_pwm_state(struct dib3000mc_state *state)
 132 {
 133         u16 reg_51, reg_52 = state->cfg->agc->setup & 0xfefb;
 134     if (state->cfg->pwm3_inversion) {
 135                 reg_51 =  (2 << 14) | (0 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 136                 reg_52 |= (1 << 2);
 137         } else {
 138                 reg_51 = (2 << 14) | (4 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 139                 reg_52 |= (1 << 8);
 140         }
 141         dib3000mc_write_word(state, 51, reg_51);
 142         dib3000mc_write_word(state, 52, reg_52);
 143
 144     if (state->cfg->use_pwm3)
 145                 dib3000mc_write_word(state, 245, (1 << 3) | (1 << 0));
 146         else
 147                 dib3000mc_write_word(state, 245, 0);
 148
 149     dib3000mc_write_word(state, 1040, 0x3);
 150         return 0;
 151 }
 152
 153 static int dib3000mc_set_output_mode(struct dib3000mc_state *state, int mode)
 154 {
 155         int    ret = 0;
 156         u16 fifo_threshold = 1792;
 157         u16 outreg = 0;
 158         u16 outmode = 0;
 159         u16 elecout = 1;
 160         u16 smo_reg = dib3000mc_read_word(state, 206) & 0x0010; /* keep the pid_parse bit */
 161
 162         dprintk("-I-  Setting output mode for demod %p to %d\n",
 163                         &state->demod, mode);
 164
 165         switch (mode) {
 166                 case OUTMODE_HIGH_Z:  // disable
 167                         elecout = 0;
 168                         break;
 169                 case OUTMODE_MPEG2_PAR_GATED_CLK:   // STBs with parallel gated clock
 170                         outmode = 0;
 171                         break;
 172                 case OUTMODE_MPEG2_PAR_CONT_CLK:    // STBs with parallel continues clock
 173                         outmode = 1;
 174                         break;
 175                 case OUTMODE_MPEG2_SERIAL:          // STBs with serial input
 176                         outmode = 2;
 177                         break;
 178                 case OUTMODE_MPEG2_FIFO:            // e.g. USB feeding
 179                         elecout = 3;
 180                         /*ADDR @ 206 :
 181                         P_smo_error_discard  [1;6:6] = 0
 182                         P_smo_rs_discard     [1;5:5] = 0
 183                         P_smo_pid_parse      [1;4:4] = 0
 184                         P_smo_fifo_flush     [1;3:3] = 0
 185                         P_smo_mode           [2;2:1] = 11
 186                         P_smo_ovf_prot       [1;0:0] = 0
 187                         */
 188                         smo_reg |= 3 << 1;
 189                         fifo_threshold = 512;
 190                         outmode = 5;
 191                         break;
 192                 case OUTMODE_DIVERSITY:
 193                         outmode = 4;
 194                         elecout = 1;
 195                         break;
 196                 default:
 197                         dprintk("Unhandled output_mode passed to be set for demod %p\n",&state->demod);
 198                         outmode = 0;
 199                         break;
 200         }
 201
 202         if ((state->cfg->output_mpeg2_in_188_bytes))
 203                 smo_reg |= (1 << 5); // P_smo_rs_discard     [1;5:5] = 1
 204
 205         outreg = dib3000mc_read_word(state, 244) & 0x07FF;
 206         outreg |= (outmode << 11);
 207         ret |= dib3000mc_write_word(state,  244, outreg);
 208         ret |= dib3000mc_write_word(state,  206, smo_reg);   /*smo_ mode*/
 209         ret |= dib3000mc_write_word(state,  207, fifo_threshold); /* synchronous fread */
 210         ret |= dib3000mc_write_word(state, 1040, elecout);         /* P_out_cfg */
 211         return ret;
 212 }
 213
 214 static int dib3000mc_set_bandwidth(struct dib3000mc_state *state, u32 bw)
 215 {
 216         u16 bw_cfg[6] = { 0 };
 217         u16 imp_bw_cfg[3] = { 0 };
 218         u16 reg;
 219
 220 /* settings here are for 27.7MHz */
 221         switch (bw) {
 222                 case 8000:
 223                         bw_cfg[0] = 0x0019; bw_cfg[1] = 0x5c30; bw_cfg[2] = 0x0054; bw_cfg[3] = 0x88a0; bw_cfg[4] = 0x01a6; bw_cfg[5] = 0xab20;
 224                         imp_bw_cfg[0] = 0x04db; imp_bw_cfg[1] = 0x00db; imp_bw_cfg[2] = 0x00b7;
 225                         break;
 226
 227                 case 7000:
 228                         bw_cfg[0] = 0x001c; bw_cfg[1] = 0xfba5; bw_cfg[2] = 0x0060; bw_cfg[3] = 0x9c25; bw_cfg[4] = 0x01e3; bw_cfg[5] = 0x0cb7;
 229                         imp_bw_cfg[0] = 0x04c0; imp_bw_cfg[1] = 0x00c0; imp_bw_cfg[2] = 0x00a0;
 230                         break;
 231
 232                 case 6000:
 233                         bw_cfg[0] = 0x0021; bw_cfg[1] = 0xd040; bw_cfg[2] = 0x0070; bw_cfg[3] = 0xb62b; bw_cfg[4] = 0x0233; bw_cfg[5] = 0x8ed5;
 234                         imp_bw_cfg[0] = 0x04a5; imp_bw_cfg[1] = 0x00a5; imp_bw_cfg[2] = 0x0089;
 235                         break;
 236
 237                 case 5000:
 238                         bw_cfg[0] = 0x0028; bw_cfg[1] = 0x9380; bw_cfg[2] = 0x0087; bw_cfg[3] = 0x4100; bw_cfg[4] = 0x02a4; bw_cfg[5] = 0x4500;
 239                         imp_bw_cfg[0] = 0x0489; imp_bw_cfg[1] = 0x0089; imp_bw_cfg[2] = 0x0072;
 240                         break;
 241
 242                 default: return -EINVAL;
 243         }
 244
 245         for (reg = 6; reg < 12; reg++)
 246                 dib3000mc_write_word(state, reg, bw_cfg[reg - 6]);
 247         dib3000mc_write_word(state, 12, 0x0000);
 248         dib3000mc_write_word(state, 13, 0x03e8);
 249         dib3000mc_write_word(state, 14, 0x0000);
 250         dib3000mc_write_word(state, 15, 0x03f2);
 251         dib3000mc_write_word(state, 16, 0x0001);
 252         dib3000mc_write_word(state, 17, 0xb0d0);
 253         // P_sec_len
 254         dib3000mc_write_word(state, 18, 0x0393);
 255         dib3000mc_write_word(state, 19, 0x8700);
 256
 257         for (reg = 55; reg < 58; reg++)
 258                 dib3000mc_write_word(state, reg, imp_bw_cfg[reg - 55]);
 259
 260         // Timing configuration
 261         dib3000mc_set_timing(state, TRANSMISSION_MODE_2K, bw, 0);
 262
 263         return 0;
 264 }
 265
 266 static u16 impulse_noise_val[29] =
 267
 268 {
 269         0x38, 0x6d9, 0x3f28, 0x7a7, 0x3a74, 0x196, 0x32a, 0x48c, 0x3ffe, 0x7f3,
 270         0x2d94, 0x76, 0x53d, 0x3ff8, 0x7e3, 0x3320, 0x76, 0x5b3, 0x3feb, 0x7d2,
 271         0x365e, 0x76, 0x48c, 0x3ffe, 0x5b3, 0x3feb, 0x76, 0x0000, 0xd
 272 };
 273
 274 static void dib3000mc_set_impulse_noise(struct dib3000mc_state *state, u8 mode, s16 nfft)
 275 {
 276         u16 i;
 277         for (i = 58; i < 87; i++)
 278                 dib3000mc_write_word(state, i, impulse_noise_val[i-58]);
 279
 280         if (nfft == TRANSMISSION_MODE_8K) {
 281                 dib3000mc_write_word(state, 58, 0x3b);
 282                 dib3000mc_write_word(state, 84, 0x00);
 283                 dib3000mc_write_word(state, 85, 0x8200);
 284         }
 285
 286         dib3000mc_write_word(state, 34, 0x1294);
 287         dib3000mc_write_word(state, 35, 0x1ff8);
 288         if (mode == 1)
 289                 dib3000mc_write_word(state, 55, dib3000mc_read_word(state, 55) | (1 << 10));
 290 }
 291
 292 static int dib3000mc_init(struct dvb_frontend *demod)
 293 {
 294         struct dib3000mc_state *state = demod->demodulator_priv;
 295         struct dibx000_agc_config *agc = state->cfg->agc;
 296
 297         // Restart Configuration
 298         dib3000mc_write_word(state, 1027, 0x8000);
 299         dib3000mc_write_word(state, 1027, 0x0000);
 300
 301         // power up the demod + mobility configuration
 302         dib3000mc_write_word(state, 140, 0x0000);
 303         dib3000mc_write_word(state, 1031, 0);
 304
 305         if (state->cfg->mobile_mode) {
 306                 dib3000mc_write_word(state, 139,  0x0000);
 307                 dib3000mc_write_word(state, 141,  0x0000);
 308                 dib3000mc_write_word(state, 175,  0x0002);
 309                 dib3000mc_write_word(state, 1032, 0x0000);
 310         } else {
 311                 dib3000mc_write_word(state, 139,  0x0001);
 312                 dib3000mc_write_word(state, 141,  0x0000);
 313                 dib3000mc_write_word(state, 175,  0x0000);
 314                 dib3000mc_write_word(state, 1032, 0x012C);
 315         }
 316         dib3000mc_write_word(state, 1033, 0x0000);
 317
 318         // P_clk_cfg
 319         dib3000mc_write_word(state, 1037, 0x3130);
 320
 321         // other configurations
 322
 323         // P_ctrl_sfreq
 324         dib3000mc_write_word(state, 33, (5 << 0));
 325         dib3000mc_write_word(state, 88, (1 << 10) | (0x10 << 0));
 326
 327         // Phase noise control
 328         // P_fft_phacor_inh, P_fft_phacor_cpe, P_fft_powrange
 329         dib3000mc_write_word(state, 99, (1 << 9) | (0x20 << 0));
 330
 331         if (state->cfg->phase_noise_mode == 0)
 332                 dib3000mc_write_word(state, 111, 0x00);
 333         else
 334                 dib3000mc_write_word(state, 111, 0x02);
 335
 336         // P_agc_global
 337         dib3000mc_write_word(state, 50, 0x8000);
 338
 339         // agc setup misc
 340         dib3000mc_setup_pwm_state(state);
 341
 342         // P_agc_counter_lock
 343         dib3000mc_write_word(state, 53, 0x87);
 344         // P_agc_counter_unlock
 345         dib3000mc_write_word(state, 54, 0x87);
 346
 347         /* agc */
 348         dib3000mc_write_word(state, 36, state->cfg->max_time);
 349         dib3000mc_write_word(state, 37, (state->cfg->agc_command1 << 13) | (state->cfg->agc_command2 << 12) | (0x1d << 0));
 350         dib3000mc_write_word(state, 38, state->cfg->pwm3_value);
 351         dib3000mc_write_word(state, 39, state->cfg->ln_adc_level);
 352
 353         // set_agc_loop_Bw
 354         dib3000mc_write_word(state, 40, 0x0179);
 355         dib3000mc_write_word(state, 41, 0x03f0);
 356
 357         dib3000mc_write_word(state, 42, agc->agc1_max);
 358         dib3000mc_write_word(state, 43, agc->agc1_min);
 359         dib3000mc_write_word(state, 44, agc->agc2_max);
 360         dib3000mc_write_word(state, 45, agc->agc2_min);
 361         dib3000mc_write_word(state, 46, (agc->agc1_pt1 << 8) | agc->agc1_pt2);
 362         dib3000mc_write_word(state, 47, (agc->agc1_slope1 << 8) | agc->agc1_slope2);
 363         dib3000mc_write_word(state, 48, (agc->agc2_pt1 << 8) | agc->agc2_pt2);
 364         dib3000mc_write_word(state, 49, (agc->agc2_slope1 << 8) | agc->agc2_slope2);
 365
 366 // Begin: TimeOut registers
 367         // P_pha3_thres
 368         dib3000mc_write_word(state, 110, 3277);
 369         // P_timf_alpha = 6, P_corm_alpha = 6, P_corm_thres = 0x80
 370         dib3000mc_write_word(state,  26, 0x6680);
 371         // lock_mask0
 372         dib3000mc_write_word(state, 1, 4);
 373         // lock_mask1
 374         dib3000mc_write_word(state, 2, 4);
 375         // lock_mask2
 376         dib3000mc_write_word(state, 3, 0x1000);
 377         // P_search_maxtrial=1
 378         dib3000mc_write_word(state, 5, 1);
 379
 380         dib3000mc_set_bandwidth(state, 8000);
 381
 382         // div_lock_mask
 383         dib3000mc_write_word(state,  4, 0x814);
 384
 385         dib3000mc_write_word(state, 21, (1 << 9) | 0x164);
 386         dib3000mc_write_word(state, 22, 0x463d);
 387
 388         // Spurious rm cfg
 389         // P_cspu_regul, P_cspu_win_cut
 390         dib3000mc_write_word(state, 120, 0x200f);
 391         // P_adp_selec_monit
 392         dib3000mc_write_word(state, 134, 0);
 393
 394         // Fec cfg
 395         dib3000mc_write_word(state, 195, 0x10);
 396
 397         // diversity register: P_dvsy_sync_wait..
 398         dib3000mc_write_word(state, 180, 0x2FF0);
 399
 400         // Impulse noise configuration
 401         dib3000mc_set_impulse_noise(state, 0, TRANSMISSION_MODE_8K);
 402
 403         // output mode set-up
 404         dib3000mc_set_output_mode(state, OUTMODE_HIGH_Z);
 405
 406         /* close the i2c-gate */
 407         dib3000mc_write_word(state, 769, (1 << 7) );
 408
 409         return 0;
 410 }
 411
 412 static int dib3000mc_sleep(struct dvb_frontend *demod)
 413 {
 414         struct dib3000mc_state *state = demod->demodulator_priv;
 415
 416         dib3000mc_write_word(state, 1031, 0xFFFF);
 417         dib3000mc_write_word(state, 1032, 0xFFFF);
 418         dib3000mc_write_word(state, 1033, 0xFFF0);
 419
 420     return 0;
 421 }
 422
 423 static void dib3000mc_set_adp_cfg(struct dib3000mc_state *state, s16 qam)
 424 {
 425         u16 cfg[4] = { 0 },reg;
 426         switch (qam) {
 427                 case QPSK:
 428                         cfg[0] = 0x099a; cfg[1] = 0x7fae; cfg[2] = 0x0333; cfg[3] = 0x7ff0;
 429                         break;
 430                 case QAM_16:
 431                         cfg[0] = 0x023d; cfg[1] = 0x7fdf; cfg[2] = 0x00a4; cfg[3] = 0x7ff0;
 432                         break;
 433                 case QAM_64:
 434                         cfg[0] = 0x0148; cfg[1] = 0x7ff0; cfg[2] = 0x00a4; cfg[3] = 0x7ff8;
 435                         break;
 436         }
 437         for (reg = 129; reg < 133; reg++)
 438                 dib3000mc_write_word(state, reg, cfg[reg - 129]);
 439 }
 440
 441 static void dib3000mc_set_channel_cfg(struct dib3000mc_state *state,
 442                                       struct dtv_frontend_properties *ch, u16 seq)
 443 {
 444         u16 value;
 445         u32 bw = BANDWIDTH_TO_KHZ(ch->bandwidth_hz);
 446
 447         dib3000mc_set_bandwidth(state, bw);
 448         dib3000mc_set_timing(state, ch->transmission_mode, bw, 0);
 449
 450 //      if (boost)
 451 //              dib3000mc_write_word(state, 100, (11 << 6) + 6);
 452 //      else
 453                 dib3000mc_write_word(state, 100, (16 << 6) + 9);
 454
 455         dib3000mc_write_word(state, 1027, 0x0800);
 456         dib3000mc_write_word(state, 1027, 0x0000);
 457
 458         //Default cfg isi offset adp
 459         dib3000mc_write_word(state, 26,  0x6680);
 460         dib3000mc_write_word(state, 29,  0x1273);
 461         dib3000mc_write_word(state, 33,       5);
 462         dib3000mc_set_adp_cfg(state, QAM_16);
 463         dib3000mc_write_word(state, 133,  15564);
 464
 465         dib3000mc_write_word(state, 12 , 0x0);
 466         dib3000mc_write_word(state, 13 , 0x3e8);
 467         dib3000mc_write_word(state, 14 , 0x0);
 468         dib3000mc_write_word(state, 15 , 0x3f2);
 469
 470         dib3000mc_write_word(state, 93,0);
 471         dib3000mc_write_word(state, 94,0);
 472         dib3000mc_write_word(state, 95,0);
 473         dib3000mc_write_word(state, 96,0);
 474         dib3000mc_write_word(state, 97,0);
 475         dib3000mc_write_word(state, 98,0);
 476
 477         dib3000mc_set_impulse_noise(state, 0, ch->transmission_mode);
 478
 479         value = 0;
 480         switch (ch->transmission_mode) {
 481                 case TRANSMISSION_MODE_2K: value |= (0 << 7); break;
 482                 default:
 483                 case TRANSMISSION_MODE_8K: value |= (1 << 7); break;
 484         }
 485         switch (ch->guard_interval) {
 486                 case GUARD_INTERVAL_1_32: value |= (0 << 5); break;
 487                 case GUARD_INTERVAL_1_16: value |= (1 << 5); break;
 488                 case GUARD_INTERVAL_1_4:  value |= (3 << 5); break;
 489                 default:
 490                 case GUARD_INTERVAL_1_8:  value |= (2 << 5); break;
 491         }
 492         switch (ch->modulation) {
 493                 case QPSK:  value |= (0 << 3); break;
 494                 case QAM_16: value |= (1 << 3); break;
 495                 default:
 496                 case QAM_64: value |= (2 << 3); break;
 497         }
 498         switch (HIERARCHY_1) {
 499                 case HIERARCHY_2: value |= 2; break;
 500                 case HIERARCHY_4: value |= 4; break;
 501                 default:
 502                 case HIERARCHY_1: value |= 1; break;
 503         }
 504         dib3000mc_write_word(state, 0, value);
 505         dib3000mc_write_word(state, 5, (1 << 8) | ((seq & 0xf) << 4));
 506
 507         value = 0;
 508         if (ch->hierarchy == 1)
 509                 value |= (1 << 4);
 510         if (1 == 1)
 511                 value |= 1;
 512         switch ((ch->hierarchy == 0 || 1 == 1) ? ch->code_rate_HP : ch->code_rate_LP) {
 513                 case FEC_2_3: value |= (2 << 1); break;
 514                 case FEC_3_4: value |= (3 << 1); break;
 515                 case FEC_5_6: value |= (5 << 1); break;
 516                 case FEC_7_8: value |= (7 << 1); break;
 517                 default:
 518                 case FEC_1_2: value |= (1 << 1); break;
 519         }
 520         dib3000mc_write_word(state, 181, value);
 521
 522         // diversity synchro delay add 50% SFN margin
 523         switch (ch->transmission_mode) {
 524                 case TRANSMISSION_MODE_8K: value = 256; break;
 525                 case TRANSMISSION_MODE_2K:
 526                 default: value = 64; break;
 527         }
 528         switch (ch->guard_interval) {
 529                 case GUARD_INTERVAL_1_16: value *= 2; break;
 530                 case GUARD_INTERVAL_1_8:  value *= 4; break;
 531                 case GUARD_INTERVAL_1_4:  value *= 8; break;
 532                 default:
 533                 case GUARD_INTERVAL_1_32: value *= 1; break;
 534         }
 535         value <<= 4;
 536         value |= dib3000mc_read_word(state, 180) & 0x000f;
 537         dib3000mc_write_word(state, 180, value);
 538
 539         // restart demod
 540         value = dib3000mc_read_word(state, 0);
 541         dib3000mc_write_word(state, 0, value | (1 << 9));
 542         dib3000mc_write_word(state, 0, value);
 543
 544         msleep(30);
 545
 546         dib3000mc_set_impulse_noise(state, state->cfg->impulse_noise_mode, ch->transmission_mode);
 547 }
 548
 549 static int dib3000mc_autosearch_start(struct dvb_frontend *demod)
 550 {
 551         struct dtv_frontend_properties *chan = &demod->dtv_property_cache;
 552         struct dib3000mc_state *state = demod->demodulator_priv;
 553         u16 reg;
 554 //      u32 val;
 555         struct dtv_frontend_properties schan;
 556
 557         schan = *chan;
 558
 559         /* TODO what is that ? */
 560
 561         /* a channel for autosearch */
 562         schan.transmission_mode = TRANSMISSION_MODE_8K;
 563         schan.guard_interval = GUARD_INTERVAL_1_32;
 564         schan.modulation = QAM_64;
 565         schan.code_rate_HP = FEC_2_3;
 566         schan.code_rate_LP = FEC_2_3;
 567         schan.hierarchy = 0;
 568
 569         dib3000mc_set_channel_cfg(state, &schan, 11);
 570
 571         reg = dib3000mc_read_word(state, 0);
 572         dib3000mc_write_word(state, 0, reg | (1 << 8));
 573         dib3000mc_read_word(state, 511);
 574         dib3000mc_write_word(state, 0, reg);
 575
 576         return 0;
 577 }
 578
 579 static int dib3000mc_autosearch_is_irq(struct dvb_frontend *demod)
 580 {
 581         struct dib3000mc_state *state = demod->demodulator_priv;
 582         u16 irq_pending = dib3000mc_read_word(state, 511);
 583
 584         if (irq_pending & 0x1) // failed
 585                 return 1;
 586
 587         if (irq_pending & 0x2) // succeeded
 588                 return 2;
 589
 590         return 0; // still pending
 591 }
 592
 593 static int dib3000mc_tune(struct dvb_frontend *demod)
 594 {
 595         struct dtv_frontend_properties *ch = &demod->dtv_property_cache;
 596         struct dib3000mc_state *state = demod->demodulator_priv;
 597
 598         // ** configure demod **
 599         dib3000mc_set_channel_cfg(state, ch, 0);
 600
 601         // activates isi
 602         if (state->sfn_workaround_active) {
 603                 dprintk("SFN workaround is active\n");
 604                 dib3000mc_write_word(state, 29, 0x1273);
 605                 dib3000mc_write_word(state, 108, 0x4000); // P_pha3_force_pha_shift
 606         } else {
 607                 dib3000mc_write_word(state, 29, 0x1073);
 608                 dib3000mc_write_word(state, 108, 0x0000); // P_pha3_force_pha_shift
 609         }
 610
 611         dib3000mc_set_adp_cfg(state, (u8)ch->modulation);
 612         if (ch->transmission_mode == TRANSMISSION_MODE_8K) {
 613                 dib3000mc_write_word(state, 26, 38528);
 614                 dib3000mc_write_word(state, 33, 8);
 615         } else {
 616                 dib3000mc_write_word(state, 26, 30336);
 617                 dib3000mc_write_word(state, 33, 6);
 618         }
 619
 620         if (dib3000mc_read_word(state, 509) & 0x80)
 621                 dib3000mc_set_timing(state, ch->transmission_mode,
 622                                      BANDWIDTH_TO_KHZ(ch->bandwidth_hz), 1);
 623
 624         return 0;
 625 }
 626
 627 struct i2c_adapter * dib3000mc_get_tuner_i2c_master(struct dvb_frontend *demod, int gating)
 628 {
 629         struct dib3000mc_state *st = demod->demodulator_priv;
 630         return dibx000_get_i2c_adapter(&st->i2c_master, DIBX000_I2C_INTERFACE_TUNER, gating);
 631 }
 632
 633 EXPORT_SYMBOL(dib3000mc_get_tuner_i2c_master);
 634
 635 static int dib3000mc_get_frontend(struct dvb_frontend* fe)
 636 {
 637         struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
 638         struct dib3000mc_state *state = fe->demodulator_priv;
 639         u16 tps = dib3000mc_read_word(state,458);
 640
 641         fep->inversion = INVERSION_AUTO;
 642
 643         fep->bandwidth_hz = state->current_bandwidth;
 644
 645         switch ((tps >> 8) & 0x1) {
 646                 case 0: fep->transmission_mode = TRANSMISSION_MODE_2K; break;
 647                 case 1: fep->transmission_mode = TRANSMISSION_MODE_8K; break;
 648         }
 649
 650         switch (tps & 0x3) {
 651                 case 0: fep->guard_interval = GUARD_INTERVAL_1_32; break;
 652                 case 1: fep->guard_interval = GUARD_INTERVAL_1_16; break;
 653                 case 2: fep->guard_interval = GUARD_INTERVAL_1_8; break;
 654                 case 3: fep->guard_interval = GUARD_INTERVAL_1_4; break;
 655         }
 656
 657         switch ((tps >> 13) & 0x3) {
 658                 case 0: fep->modulation = QPSK; break;
 659                 case 1: fep->modulation = QAM_16; break;
 660                 case 2:
 661                 default: fep->modulation = QAM_64; break;
 662         }
 663
 664         /* as long as the frontend_param structure is fixed for hierarchical transmission I refuse to use it */
 665         /* (tps >> 12) & 0x1 == hrch is used, (tps >> 9) & 0x7 == alpha */
 666
 667         fep->hierarchy = HIERARCHY_NONE;
 668         switch ((tps >> 5) & 0x7) {
 669                 case 1: fep->code_rate_HP = FEC_1_2; break;
 670                 case 2: fep->code_rate_HP = FEC_2_3; break;
 671                 case 3: fep->code_rate_HP = FEC_3_4; break;
 672                 case 5: fep->code_rate_HP = FEC_5_6; break;
 673                 case 7:
 674                 default: fep->code_rate_HP = FEC_7_8; break;
 675
 676         }
 677
 678         switch ((tps >> 2) & 0x7) {
 679                 case 1: fep->code_rate_LP = FEC_1_2; break;
 680                 case 2: fep->code_rate_LP = FEC_2_3; break;
 681                 case 3: fep->code_rate_LP = FEC_3_4; break;
 682                 case 5: fep->code_rate_LP = FEC_5_6; break;
 683                 case 7:
 684                 default: fep->code_rate_LP = FEC_7_8; break;
 685         }
 686
 687         return 0;
 688 }
 689
 690 static int dib3000mc_set_frontend(struct dvb_frontend *fe)
 691 {
 692         struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
 693         struct dib3000mc_state *state = fe->demodulator_priv;
 694         int ret;
 695
 696         dib3000mc_set_output_mode(state, OUTMODE_HIGH_Z);
 697
 698         state->current_bandwidth = fep->bandwidth_hz;
 699         dib3000mc_set_bandwidth(state, BANDWIDTH_TO_KHZ(fep->bandwidth_hz));
 700
 701         /* maybe the parameter has been changed */
 702         state->sfn_workaround_active = buggy_sfn_workaround;
 703
 704         if (fe->ops.tuner_ops.set_params) {
 705                 fe->ops.tuner_ops.set_params(fe);
 706                 msleep(100);
 707         }
 708
 709         if (fep->transmission_mode  == TRANSMISSION_MODE_AUTO ||
 710             fep->guard_interval == GUARD_INTERVAL_AUTO ||
 711             fep->modulation     == QAM_AUTO ||
 712             fep->code_rate_HP   == FEC_AUTO) {
 713                 int i = 1000, found;
 714
 715                 dib3000mc_autosearch_start(fe);
 716                 do {
 717                         msleep(1);
 718                         found = dib3000mc_autosearch_is_irq(fe);
 719                 } while (found == 0 && i--);
 720
 721                 dprintk("autosearch returns: %d\n",found);
 722                 if (found == 0 || found == 1)
 723                         return 0; // no channel found
 724
 725                 dib3000mc_get_frontend(fe);
 726         }
 727
 728         ret = dib3000mc_tune(fe);
 729
 730         /* make this a config parameter */
 731         dib3000mc_set_output_mode(state, OUTMODE_MPEG2_FIFO);
 732         return ret;
 733 }
 734
 735 static int dib3000mc_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 736 {
 737         struct dib3000mc_state *state = fe->demodulator_priv;
 738         u16 lock = dib3000mc_read_word(state, 509);
 739
 740         *stat = 0;
 741
 742         if (lock & 0x8000)
 743                 *stat |= FE_HAS_SIGNAL;
 744         if (lock & 0x3000)
 745                 *stat |= FE_HAS_CARRIER;
 746         if (lock & 0x0100)
 747                 *stat |= FE_HAS_VITERBI;
 748         if (lock & 0x0010)
 749                 *stat |= FE_HAS_SYNC;
 750         if (lock & 0x0008)
 751                 *stat |= FE_HAS_LOCK;
 752
 753         return 0;
 754 }
 755
 756 static int dib3000mc_read_ber(struct dvb_frontend *fe, u32 *ber)
 757 {
 758         struct dib3000mc_state *state = fe->demodulator_priv;
 759         *ber = (dib3000mc_read_word(state, 500) << 16) | dib3000mc_read_word(state, 501);
 760         return 0;
 761 }
 762
 763 static int dib3000mc_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
 764 {
 765         struct dib3000mc_state *state = fe->demodulator_priv;
 766         *unc = dib3000mc_read_word(state, 508);
 767         return 0;
 768 }
 769
 770 static int dib3000mc_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 771 {
 772         struct dib3000mc_state *state = fe->demodulator_priv;
 773         u16 val = dib3000mc_read_word(state, 392);
 774         *strength = 65535 - val;
 775         return 0;
 776 }
 777
 778 static int dib3000mc_read_snr(struct dvb_frontend* fe, u16 *snr)
 779 {
 780         *snr = 0x0000;
 781         return 0;
 782 }
 783
 784 static int dib3000mc_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 785 {
 786         tune->min_delay_ms = 1000;
 787         return 0;
 788 }
 789
 790 static void dib3000mc_release(struct dvb_frontend *fe)
 791 {
 792         struct dib3000mc_state *state = fe->demodulator_priv;
 793         dibx000_exit_i2c_master(&state->i2c_master);
 794         kfree(state);
 795 }
 796
 797 int dib3000mc_pid_control(struct dvb_frontend *fe, int index, int pid,int onoff)
 798 {
 799         struct dib3000mc_state *state = fe->demodulator_priv;
 800         dib3000mc_write_word(state, 212 + index,  onoff ? (1 << 13) | pid : 0);
 801         return 0;
 802 }
 803 EXPORT_SYMBOL(dib3000mc_pid_control);
 804
 805 int dib3000mc_pid_parse(struct dvb_frontend *fe, int onoff)
 806 {
 807         struct dib3000mc_state *state = fe->demodulator_priv;
 808         u16 tmp = dib3000mc_read_word(state, 206) & ~(1 << 4);
 809         tmp |= (onoff << 4);
 810         return dib3000mc_write_word(state, 206, tmp);
 811 }
 812 EXPORT_SYMBOL(dib3000mc_pid_parse);
 813
 814 void dib3000mc_set_config(struct dvb_frontend *fe, struct dib3000mc_config *cfg)
 815 {
 816         struct dib3000mc_state *state = fe->demodulator_priv;
 817         state->cfg = cfg;
 818 }
 819 EXPORT_SYMBOL(dib3000mc_set_config);
 820
 821 int dib3000mc_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, struct dib3000mc_config cfg[])
 822 {
 823         struct dib3000mc_state *dmcst;
 824         int k;
 825         u8 new_addr;
 826
 827         static u8 DIB3000MC_I2C_ADDRESS[] = {20,22,24,26};
 828
 829         dmcst = kzalloc(sizeof(struct dib3000mc_state), GFP_KERNEL);
 830         if (dmcst == NULL)
 831                 return -ENOMEM;
 832
 833         dmcst->i2c_adap = i2c;
 834
 835         for (k = no_of_demods-1; k >= 0; k--) {
 836                 dmcst->cfg = &cfg[k];
 837
 838                 /* designated i2c address */
 839                 new_addr          = DIB3000MC_I2C_ADDRESS[k];
 840                 dmcst->i2c_addr = new_addr;
 841                 if (dib3000mc_identify(dmcst) != 0) {
 842                         dmcst->i2c_addr = default_addr;
 843                         if (dib3000mc_identify(dmcst) != 0) {
 844                                 dprintk("-E-  DiB3000P/MC #%d: not identified\n", k);
 845                                 kfree(dmcst);
 846                                 return -ENODEV;
 847                         }
 848                 }
 849
 850                 dib3000mc_set_output_mode(dmcst, OUTMODE_MPEG2_PAR_CONT_CLK);
 851
 852                 // set new i2c address and force divstr (Bit 1) to value 0 (Bit 0)
 853                 dib3000mc_write_word(dmcst, 1024, (new_addr << 3) | 0x1);
 854                 dmcst->i2c_addr = new_addr;
 855         }
 856
 857         for (k = 0; k < no_of_demods; k++) {
 858                 dmcst->cfg = &cfg[k];
 859                 dmcst->i2c_addr = DIB3000MC_I2C_ADDRESS[k];
 860
 861                 dib3000mc_write_word(dmcst, 1024, dmcst->i2c_addr << 3);
 862
 863                 /* turn off data output */
 864                 dib3000mc_set_output_mode(dmcst, OUTMODE_HIGH_Z);
 865         }
 866
 867         kfree(dmcst);
 868         return 0;
 869 }
 870 EXPORT_SYMBOL(dib3000mc_i2c_enumeration);
 871
 872 static struct dvb_frontend_ops dib3000mc_ops;
 873
 874 struct dvb_frontend * dib3000mc_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, struct dib3000mc_config *cfg)
 875 {
 876         struct dvb_frontend *demod;
 877         struct dib3000mc_state *st;
 878         st = kzalloc(sizeof(struct dib3000mc_state), GFP_KERNEL);
 879         if (st == NULL)
 880                 return NULL;
 881
 882         st->cfg = cfg;
 883         st->i2c_adap = i2c_adap;
 884         st->i2c_addr = i2c_addr;
 885
 886         demod                   = &st->demod;
 887         demod->demodulator_priv = st;
 888         memcpy(&st->demod.ops, &dib3000mc_ops, sizeof(struct dvb_frontend_ops));
 889
 890         if (dib3000mc_identify(st) != 0)
 891                 goto error;
 892
 893         dibx000_init_i2c_master(&st->i2c_master, DIB3000MC, st->i2c_adap, st->i2c_addr);
 894
 895         dib3000mc_write_word(st, 1037, 0x3130);
 896
 897         return demod;
 898
 899 error:
 900         kfree(st);
 901         return NULL;
 902 }
 903 EXPORT_SYMBOL(dib3000mc_attach);
 904
 905 static struct dvb_frontend_ops dib3000mc_ops = {
 906         .delsys = { SYS_DVBT },
 907         .info = {
 908                 .name = "DiBcom 3000MC/P",
 909                 .frequency_min      = 44250000,
 910                 .frequency_max      = 867250000,
 911                 .frequency_stepsize = 62500,
 912                 .caps = FE_CAN_INVERSION_AUTO |
 913                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 914                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 915                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 916                         FE_CAN_TRANSMISSION_MODE_AUTO |
 917                         FE_CAN_GUARD_INTERVAL_AUTO |
 918                         FE_CAN_RECOVER |
 919                         FE_CAN_HIERARCHY_AUTO,
 920         },
 921
 922         .release              = dib3000mc_release,
 923
 924         .init                 = dib3000mc_init,
 925         .sleep                = dib3000mc_sleep,
 926
 927         .set_frontend         = dib3000mc_set_frontend,
 928         .get_tune_settings    = dib3000mc_fe_get_tune_settings,
 929         .get_frontend         = dib3000mc_get_frontend,
 930
 931         .read_status          = dib3000mc_read_status,
 932         .read_ber             = dib3000mc_read_ber,
 933         .read_signal_strength = dib3000mc_read_signal_strength,
 934         .read_snr             = dib3000mc_read_snr,
 935         .read_ucblocks        = dib3000mc_read_unc_blocks,
 936 };
 937
 938 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 939 MODULE_DESCRIPTION("Driver for the DiBcom 3000MC/P COFDM demodulator");
 940 MODULE_LICENSE("GPL");