drivers/media/dvb/frontends/dib3000mc.c

   1 /*
   2  * Driver for DiBcom DiB3000MC/P-demodulator.
   3  *
   4  * Copyright (C) 2004-6 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/i2c.h>
  16 //#include <linux/init.h>
  17 //#include <linux/delay.h>
  18 //#include <linux/string.h>
  19 //#include <linux/slab.h>
  20
  21 #include "dvb_frontend.h"
  22
  23 #include "dib3000mc.h"
  24
  25 static int debug;
  26 module_param(debug, int, 0644);
  27 MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
  28
  29 #define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiB3000MC/P:"); printk(args); } } while (0)
  30
  31 struct dib3000mc_state {
  32         struct dvb_frontend demod;
  33         struct dib3000mc_config *cfg;
  34
  35         u8 i2c_addr;
  36         struct i2c_adapter *i2c_adap;
  37
  38         struct dibx000_i2c_master i2c_master;
  39
  40         u32 timf;
  41
  42         fe_bandwidth_t current_bandwidth;
  43
  44         u16 dev_id;
  45 };
  46
  47 static u16 dib3000mc_read_word(struct dib3000mc_state *state, u16 reg)
  48 {
  49         u8 wb[2] = { (reg >> 8) | 0x80, reg & 0xff };
  50         u8 rb[2];
  51         struct i2c_msg msg[2] = {
  52                 { .addr = state->i2c_addr >> 1, .flags = 0,        .buf = wb, .len = 2 },
  53                 { .addr = state->i2c_addr >> 1, .flags = I2C_M_RD, .buf = rb, .len = 2 },
  54         };
  55
  56         if (i2c_transfer(state->i2c_adap, msg, 2) != 2)
  57                 dprintk("i2c read error on %d\n",reg);
  58
  59         return (rb[0] << 8) | rb[1];
  60 }
  61
  62 static int dib3000mc_write_word(struct dib3000mc_state *state, u16 reg, u16 val)
  63 {
  64         u8 b[4] = {
  65                 (reg >> 8) & 0xff, reg & 0xff,
  66                 (val >> 8) & 0xff, val & 0xff,
  67         };
  68         struct i2c_msg msg = {
  69                 .addr = state->i2c_addr >> 1, .flags = 0, .buf = b, .len = 4
  70         };
  71         return i2c_transfer(state->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
  72 }
  73
  74
  75 static int dib3000mc_identify(struct dib3000mc_state *state)
  76 {
  77         u16 value;
  78         if ((value = dib3000mc_read_word(state, 1025)) != 0x01b3) {
  79                 dprintk("-E-  DiB3000MC/P: wrong Vendor ID (read=0x%x)\n",value);
  80                 return -EREMOTEIO;
  81         }
  82
  83         value = dib3000mc_read_word(state, 1026);
  84         if (value != 0x3001 && value != 0x3002) {
  85                 dprintk("-E-  DiB3000MC/P: wrong Device ID (%x)\n",value);
  86                 return -EREMOTEIO;
  87         }
  88         state->dev_id = value;
  89
  90         dprintk("-I-  found DiB3000MC/P: %x\n",state->dev_id);
  91
  92         return 0;
  93 }
  94
  95 static int dib3000mc_set_timing(struct dib3000mc_state *state, s16 nfft, u8 bw, u8 update_offset)
  96 {
  97         u32 timf;
  98
  99         if (state->timf == 0) {
 100                 timf = 1384402; // default value for 8MHz
 101                 if (update_offset)
 102                         msleep(200); // first time we do an update
 103         } else
 104                 timf = state->timf;
 105
 106         timf *= (BW_INDEX_TO_KHZ(bw) / 1000);
 107
 108         if (update_offset) {
 109                 s16 tim_offs = dib3000mc_read_word(state, 416);
 110
 111                 if (tim_offs &  0x2000)
 112                         tim_offs -= 0x4000;
 113
 114                 if (nfft == 0)
 115                         tim_offs *= 4;
 116
 117                 timf += tim_offs;
 118                 state->timf = timf / (BW_INDEX_TO_KHZ(bw) / 1000);
 119         }
 120
 121         dprintk("timf: %d\n", timf);
 122
 123         dib3000mc_write_word(state, 23, timf >> 16);
 124         dib3000mc_write_word(state, 24, timf & 0xffff);
 125
 126         return 0;
 127 }
 128
 129 static int dib3000mc_setup_pwm_state(struct dib3000mc_state *state)
 130 {
 131         u16 reg_51, reg_52 = state->cfg->agc->setup & 0xfefb;
 132     if (state->cfg->pwm3_inversion) {
 133                 reg_51 =  (2 << 14) | (0 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 134                 reg_52 |= (1 << 2);
 135         } else {
 136                 reg_51 = (2 << 14) | (4 << 10) | (7 << 6) | (2 << 2) | (2 << 0);
 137                 reg_52 |= (1 << 8);
 138         }
 139         dib3000mc_write_word(state, 51, reg_51);
 140         dib3000mc_write_word(state, 52, reg_52);
 141
 142     if (state->cfg->use_pwm3)
 143                 dib3000mc_write_word(state, 245, (1 << 3) | (1 << 0));
 144         else
 145                 dib3000mc_write_word(state, 245, 0);
 146
 147     dib3000mc_write_word(state, 1040, 0x3);
 148         return 0;
 149 }
 150
 151 static int dib3000mc_set_output_mode(struct dib3000mc_state *state, int mode)
 152 {
 153         int    ret = 0;
 154         u16 fifo_threshold = 1792;
 155         u16 outreg = 0;
 156         u16 outmode = 0;
 157         u16 elecout = 1;
 158         u16 smo_reg = dib3000mc_read_word(state, 206) & 0x0010; /* keep the pid_parse bit */
 159
 160         dprintk("-I-  Setting output mode for demod %p to %d\n",
 161                         &state->demod, mode);
 162
 163         switch (mode) {
 164                 case OUTMODE_HIGH_Z:  // disable
 165                         elecout = 0;
 166                         break;
 167                 case OUTMODE_MPEG2_PAR_GATED_CLK:   // STBs with parallel gated clock
 168                         outmode = 0;
 169                         break;
 170                 case OUTMODE_MPEG2_PAR_CONT_CLK:    // STBs with parallel continues clock
 171                         outmode = 1;
 172                         break;
 173                 case OUTMODE_MPEG2_SERIAL:          // STBs with serial input
 174                         outmode = 2;
 175                         break;
 176                 case OUTMODE_MPEG2_FIFO:            // e.g. USB feeding
 177                         elecout = 3;
 178                         /*ADDR @ 206 :
 179                         P_smo_error_discard  [1;6:6] = 0
 180                         P_smo_rs_discard     [1;5:5] = 0
 181                         P_smo_pid_parse      [1;4:4] = 0
 182                         P_smo_fifo_flush     [1;3:3] = 0
 183                         P_smo_mode           [2;2:1] = 11
 184                         P_smo_ovf_prot       [1;0:0] = 0
 185                         */
 186                         smo_reg |= 3 << 1;
 187                         fifo_threshold = 512;
 188                         outmode = 5;
 189                         break;
 190                 case OUTMODE_DIVERSITY:
 191                         outmode = 4;
 192                         elecout = 1;
 193                         break;
 194                 default:
 195                         dprintk("Unhandled output_mode passed to be set for demod %p\n",&state->demod);
 196                         outmode = 0;
 197                         break;
 198         }
 199
 200         if ((state->cfg->output_mpeg2_in_188_bytes))
 201                 smo_reg |= (1 << 5); // P_smo_rs_discard     [1;5:5] = 1
 202
 203         outreg = dib3000mc_read_word(state, 244) & 0x07FF;
 204         outreg |= (outmode << 11);
 205         ret |= dib3000mc_write_word(state,  244, outreg);
 206         ret |= dib3000mc_write_word(state,  206, smo_reg);   /*smo_ mode*/
 207         ret |= dib3000mc_write_word(state,  207, fifo_threshold); /* synchronous fread */
 208         ret |= dib3000mc_write_word(state, 1040, elecout);         /* P_out_cfg */
 209         return ret;
 210 }
 211
 212 static int dib3000mc_set_bandwidth(struct dvb_frontend *demod, u8 bw)
 213 {
 214         struct dib3000mc_state *state = demod->demodulator_priv;
 215         u16 bw_cfg[6] = { 0 };
 216         u16 imp_bw_cfg[3] = { 0 };
 217         u16 reg;
 218
 219 /* settings here are for 27.7MHz */
 220         switch (bw) {
 221                 case BANDWIDTH_8_MHZ:
 222                         bw_cfg[0] = 0x0019; bw_cfg[1] = 0x5c30; bw_cfg[2] = 0x0054; bw_cfg[3] = 0x88a0; bw_cfg[4] = 0x01a6; bw_cfg[5] = 0xab20;
 223                         imp_bw_cfg[0] = 0x04db; imp_bw_cfg[1] = 0x00db; imp_bw_cfg[2] = 0x00b7;
 224                         break;
 225
 226                 case BANDWIDTH_7_MHZ:
 227                         bw_cfg[0] = 0x001c; bw_cfg[1] = 0xfba5; bw_cfg[2] = 0x0060; bw_cfg[3] = 0x9c25; bw_cfg[4] = 0x01e3; bw_cfg[5] = 0x0cb7;
 228                         imp_bw_cfg[0] = 0x04c0; imp_bw_cfg[1] = 0x00c0; imp_bw_cfg[2] = 0x00a0;
 229                         break;
 230
 231                 case BANDWIDTH_6_MHZ:
 232                         bw_cfg[0] = 0x0021; bw_cfg[1] = 0xd040; bw_cfg[2] = 0x0070; bw_cfg[3] = 0xb62b; bw_cfg[4] = 0x0233; bw_cfg[5] = 0x8ed5;
 233                         imp_bw_cfg[0] = 0x04a5; imp_bw_cfg[1] = 0x00a5; imp_bw_cfg[2] = 0x0089;
 234                         break;
 235
 236                 case 255 /* BANDWIDTH_5_MHZ */:
 237                         bw_cfg[0] = 0x0028; bw_cfg[1] = 0x9380; bw_cfg[2] = 0x0087; bw_cfg[3] = 0x4100; bw_cfg[4] = 0x02a4; bw_cfg[5] = 0x4500;
 238                         imp_bw_cfg[0] = 0x0489; imp_bw_cfg[1] = 0x0089; imp_bw_cfg[2] = 0x0072;
 239                         break;
 240
 241                 default: return -EINVAL;
 242         }
 243
 244         for (reg = 6; reg < 12; reg++)
 245                 dib3000mc_write_word(state, reg, bw_cfg[reg - 6]);
 246         dib3000mc_write_word(state, 12, 0x0000);
 247         dib3000mc_write_word(state, 13, 0x03e8);
 248         dib3000mc_write_word(state, 14, 0x0000);
 249         dib3000mc_write_word(state, 15, 0x03f2);
 250         dib3000mc_write_word(state, 16, 0x0001);
 251         dib3000mc_write_word(state, 17, 0xb0d0);
 252         // P_sec_len
 253         dib3000mc_write_word(state, 18, 0x0393);
 254         dib3000mc_write_word(state, 19, 0x8700);
 255
 256         for (reg = 55; reg < 58; reg++)
 257                 dib3000mc_write_word(state, reg, imp_bw_cfg[reg - 55]);
 258
 259         // Timing configuration
 260         dib3000mc_set_timing(state, 0, bw, 0);
 261
 262         return 0;
 263 }
 264
 265 static u16 impulse_noise_val[29] =
 266
 267 {
 268         0x38, 0x6d9, 0x3f28, 0x7a7, 0x3a74, 0x196, 0x32a, 0x48c, 0x3ffe, 0x7f3,
 269         0x2d94, 0x76, 0x53d, 0x3ff8, 0x7e3, 0x3320, 0x76, 0x5b3, 0x3feb, 0x7d2,
 270         0x365e, 0x76, 0x48c, 0x3ffe, 0x5b3, 0x3feb, 0x76, 0x0000, 0xd
 271 };
 272
 273 static void dib3000mc_set_impulse_noise(struct dib3000mc_state *state, u8 mode, s16 nfft)
 274 {
 275         u16 i;
 276         for (i = 58; i < 87; i++)
 277                 dib3000mc_write_word(state, i, impulse_noise_val[i-58]);
 278
 279         if (nfft == 1) {
 280                 dib3000mc_write_word(state, 58, 0x3b);
 281                 dib3000mc_write_word(state, 84, 0x00);
 282                 dib3000mc_write_word(state, 85, 0x8200);
 283         }
 284
 285         dib3000mc_write_word(state, 34, 0x1294);
 286         dib3000mc_write_word(state, 35, 0x1ff8);
 287         if (mode == 1)
 288                 dib3000mc_write_word(state, 55, dib3000mc_read_word(state, 55) | (1 << 10));
 289 }
 290
 291 static int dib3000mc_init(struct dvb_frontend *demod)
 292 {
 293         struct dib3000mc_state *state = demod->demodulator_priv;
 294         struct dibx000_agc_config *agc = state->cfg->agc;
 295
 296         // Restart Configuration
 297         dib3000mc_write_word(state, 1027, 0x8000);
 298         dib3000mc_write_word(state, 1027, 0x0000);
 299
 300         // power up the demod + mobility configuration
 301         dib3000mc_write_word(state, 140, 0x0000);
 302         dib3000mc_write_word(state, 1031, 0);
 303
 304         if (state->cfg->mobile_mode) {
 305                 dib3000mc_write_word(state, 139,  0x0000);
 306                 dib3000mc_write_word(state, 141,  0x0000);
 307                 dib3000mc_write_word(state, 175,  0x0002);
 308                 dib3000mc_write_word(state, 1032, 0x0000);
 309         } else {
 310                 dib3000mc_write_word(state, 139,  0x0001);
 311                 dib3000mc_write_word(state, 141,  0x0000);
 312                 dib3000mc_write_word(state, 175,  0x0000);
 313                 dib3000mc_write_word(state, 1032, 0x012C);
 314         }
 315         dib3000mc_write_word(state, 1033, 0x0000);
 316
 317         // P_clk_cfg
 318         dib3000mc_write_word(state, 1037, 0x3130);
 319
 320         // other configurations
 321
 322         // P_ctrl_sfreq
 323         dib3000mc_write_word(state, 33, (5 << 0));
 324         dib3000mc_write_word(state, 88, (1 << 10) | (0x10 << 0));
 325
 326         // Phase noise control
 327         // P_fft_phacor_inh, P_fft_phacor_cpe, P_fft_powrange
 328         dib3000mc_write_word(state, 99, (1 << 9) | (0x20 << 0));
 329
 330         if (state->cfg->phase_noise_mode == 0)
 331                 dib3000mc_write_word(state, 111, 0x00);
 332         else
 333                 dib3000mc_write_word(state, 111, 0x02);
 334
 335         // P_agc_global
 336         dib3000mc_write_word(state, 50, 0x8000);
 337
 338         // agc setup misc
 339         dib3000mc_setup_pwm_state(state);
 340
 341         // P_agc_counter_lock
 342         dib3000mc_write_word(state, 53, 0x87);
 343         // P_agc_counter_unlock
 344         dib3000mc_write_word(state, 54, 0x87);
 345
 346         /* agc */
 347         dib3000mc_write_word(state, 36, state->cfg->max_time);
 348         dib3000mc_write_word(state, 37, (state->cfg->agc_command1 << 13) | (state->cfg->agc_command2 << 12) | (0x1d << 0));
 349         dib3000mc_write_word(state, 38, state->cfg->pwm3_value);
 350         dib3000mc_write_word(state, 39, state->cfg->ln_adc_level);
 351
 352         // set_agc_loop_Bw
 353         dib3000mc_write_word(state, 40, 0x0179);
 354         dib3000mc_write_word(state, 41, 0x03f0);
 355
 356         dib3000mc_write_word(state, 42, agc->agc1_max);
 357         dib3000mc_write_word(state, 43, agc->agc1_min);
 358         dib3000mc_write_word(state, 44, agc->agc2_max);
 359         dib3000mc_write_word(state, 45, agc->agc2_min);
 360         dib3000mc_write_word(state, 46, (agc->agc1_pt1 << 8) | agc->agc1_pt2);
 361         dib3000mc_write_word(state, 47, (agc->agc1_slope1 << 8) | agc->agc1_slope2);
 362         dib3000mc_write_word(state, 48, (agc->agc2_pt1 << 8) | agc->agc2_pt2);
 363         dib3000mc_write_word(state, 49, (agc->agc2_slope1 << 8) | agc->agc2_slope2);
 364
 365 // Begin: TimeOut registers
 366         // P_pha3_thres
 367         dib3000mc_write_word(state, 110, 3277);
 368         // P_timf_alpha = 6, P_corm_alpha = 6, P_corm_thres = 0x80
 369         dib3000mc_write_word(state,  26, 0x6680);
 370         // lock_mask0
 371         dib3000mc_write_word(state, 1, 4);
 372         // lock_mask1
 373         dib3000mc_write_word(state, 2, 4);
 374         // lock_mask2
 375         dib3000mc_write_word(state, 3, 0x1000);
 376         // P_search_maxtrial=1
 377         dib3000mc_write_word(state, 5, 1);
 378
 379         dib3000mc_set_bandwidth(&state->demod, BANDWIDTH_8_MHZ);
 380
 381         // div_lock_mask
 382         dib3000mc_write_word(state,  4, 0x814);
 383
 384         dib3000mc_write_word(state, 21, (1 << 9) | 0x164);
 385         dib3000mc_write_word(state, 22, 0x463d);
 386
 387         // Spurious rm cfg
 388         // P_cspu_regul, P_cspu_win_cut
 389         dib3000mc_write_word(state, 120, 0x200f);
 390         // P_adp_selec_monit
 391         dib3000mc_write_word(state, 134, 0);
 392
 393         // Fec cfg
 394         dib3000mc_write_word(state, 195, 0x10);
 395
 396         // diversity register: P_dvsy_sync_wait..
 397         dib3000mc_write_word(state, 180, 0x2FF0);
 398
 399         // Impulse noise configuration
 400         dib3000mc_set_impulse_noise(state, 0, 1);
 401
 402         // output mode set-up
 403         dib3000mc_set_output_mode(state, OUTMODE_HIGH_Z);
 404
 405         /* close the i2c-gate */
 406         dib3000mc_write_word(state, 769, (1 << 7) );
 407
 408         return 0;
 409 }
 410
 411 static int dib3000mc_sleep(struct dvb_frontend *demod)
 412 {
 413         struct dib3000mc_state *state = demod->demodulator_priv;
 414
 415         dib3000mc_write_word(state, 1031, 0xFFFF);
 416         dib3000mc_write_word(state, 1032, 0xFFFF);
 417         dib3000mc_write_word(state, 1033, 0xFFF0);
 418
 419     return 0;
 420 }
 421
 422 static void dib3000mc_set_adp_cfg(struct dib3000mc_state *state, s16 qam)
 423 {
 424         u16 cfg[4] = { 0 },reg;
 425         switch (qam) {
 426                 case 0:
 427                         cfg[0] = 0x099a; cfg[1] = 0x7fae; cfg[2] = 0x0333; cfg[3] = 0x7ff0;
 428                         break;
 429                 case 1:
 430                         cfg[0] = 0x023d; cfg[1] = 0x7fdf; cfg[2] = 0x00a4; cfg[3] = 0x7ff0;
 431                         break;
 432                 case 2:
 433                         cfg[0] = 0x0148; cfg[1] = 0x7ff0; cfg[2] = 0x00a4; cfg[3] = 0x7ff8;
 434                         break;
 435         }
 436         for (reg = 129; reg < 133; reg++)
 437                 dib3000mc_write_word(state, reg, cfg[reg - 129]);
 438 }
 439
 440 static void dib3000mc_set_channel_cfg(struct dib3000mc_state *state, struct dibx000_ofdm_channel *chan, u16 seq)
 441 {
 442         u16 tmp;
 443
 444         dib3000mc_set_timing(state, chan->nfft, chan->Bw, 0);
 445
 446 //      if (boost)
 447 //              dib3000mc_write_word(state, 100, (11 << 6) + 6);
 448 //      else
 449                 dib3000mc_write_word(state, 100, (16 << 6) + 9);
 450
 451         dib3000mc_write_word(state, 1027, 0x0800);
 452         dib3000mc_write_word(state, 1027, 0x0000);
 453
 454         //Default cfg isi offset adp
 455         dib3000mc_write_word(state, 26,  0x6680);
 456         dib3000mc_write_word(state, 29,  0x1273);
 457         dib3000mc_write_word(state, 33,       5);
 458         dib3000mc_set_adp_cfg(state, 1);
 459         dib3000mc_write_word(state, 133,  15564);
 460
 461         dib3000mc_write_word(state, 12 , 0x0);
 462         dib3000mc_write_word(state, 13 , 0x3e8);
 463         dib3000mc_write_word(state, 14 , 0x0);
 464         dib3000mc_write_word(state, 15 , 0x3f2);
 465
 466         dib3000mc_write_word(state, 93,0);
 467         dib3000mc_write_word(state, 94,0);
 468         dib3000mc_write_word(state, 95,0);
 469         dib3000mc_write_word(state, 96,0);
 470         dib3000mc_write_word(state, 97,0);
 471         dib3000mc_write_word(state, 98,0);
 472
 473         dib3000mc_set_impulse_noise(state, 0, chan->nfft);
 474
 475         tmp = ((chan->nfft & 0x1) << 7) | (chan->guard << 5) | (chan->nqam << 3) | chan->vit_alpha;
 476         dib3000mc_write_word(state, 0, tmp);
 477
 478         dib3000mc_write_word(state, 5, seq);
 479
 480         tmp = (chan->vit_hrch << 4) | (chan->vit_select_hp);
 481         if (!chan->vit_hrch || (chan->vit_hrch && chan->vit_select_hp))
 482                 tmp |= chan->vit_code_rate_hp << 1;
 483         else
 484                 tmp |= chan->vit_code_rate_lp << 1;
 485         dib3000mc_write_word(state, 181, tmp);
 486
 487         // diversity synchro delay
 488         tmp = dib3000mc_read_word(state, 180) & 0x000f;
 489         tmp |= ((chan->nfft == 0) ? 64 : 256) * ((1 << (chan->guard)) * 3 / 2) << 4; // add 50% SFN margin
 490         dib3000mc_write_word(state, 180, tmp);
 491
 492         // restart demod
 493         tmp = dib3000mc_read_word(state, 0);
 494         dib3000mc_write_word(state, 0, tmp | (1 << 9));
 495         dib3000mc_write_word(state, 0, tmp);
 496
 497         msleep(30);
 498
 499         dib3000mc_set_impulse_noise(state, state->cfg->impulse_noise_mode, chan->nfft);
 500 }
 501
 502 static int dib3000mc_autosearch_start(struct dvb_frontend *demod, struct dibx000_ofdm_channel *chan)
 503 {
 504         struct dib3000mc_state *state = demod->demodulator_priv;
 505         u16 reg;
 506 //      u32 val;
 507         struct dibx000_ofdm_channel fchan;
 508
 509         INIT_OFDM_CHANNEL(&fchan);
 510         fchan = *chan;
 511
 512
 513         /* a channel for autosearch */
 514         reg = 0;
 515         if (chan->nfft == -1 && chan->guard == -1) reg = 7;
 516         if (chan->nfft == -1 && chan->guard != -1) reg = 2;
 517         if (chan->nfft != -1 && chan->guard == -1) reg = 3;
 518
 519         fchan.nfft = 1; fchan.guard = 0; fchan.nqam = 2;
 520         fchan.vit_alpha = 1; fchan.vit_code_rate_hp = 2; fchan.vit_code_rate_lp = 2;
 521         fchan.vit_hrch = 0; fchan.vit_select_hp = 1;
 522
 523         dib3000mc_set_channel_cfg(state, &fchan, reg);
 524
 525         reg = dib3000mc_read_word(state, 0);
 526         dib3000mc_write_word(state, 0, reg | (1 << 8));
 527         dib3000mc_read_word(state, 511);
 528         dib3000mc_write_word(state, 0, reg);
 529
 530         return 0;
 531 }
 532
 533 static int dib3000mc_autosearch_is_irq(struct dvb_frontend *demod)
 534 {
 535         struct dib3000mc_state *state = demod->demodulator_priv;
 536         u16 irq_pending = dib3000mc_read_word(state, 511);
 537
 538         if (irq_pending & 0x1) // failed
 539                 return 1;
 540
 541         if (irq_pending & 0x2) // succeeded
 542                 return 2;
 543
 544         return 0; // still pending
 545 }
 546
 547 static int dib3000mc_tune(struct dvb_frontend *demod, struct dibx000_ofdm_channel *ch)
 548 {
 549         struct dib3000mc_state *state = demod->demodulator_priv;
 550
 551         // ** configure demod **
 552         dib3000mc_set_channel_cfg(state, ch, 0);
 553
 554         // activates isi
 555         dib3000mc_write_word(state, 29, 0x1073);
 556
 557         dib3000mc_set_adp_cfg(state, (u8)ch->nqam);
 558
 559         if (ch->nfft == 1) {
 560                 dib3000mc_write_word(state, 26, 38528);
 561                 dib3000mc_write_word(state, 33, 8);
 562         } else {
 563                 dib3000mc_write_word(state, 26, 30336);
 564                 dib3000mc_write_word(state, 33, 6);
 565         }
 566
 567         if (dib3000mc_read_word(state, 509) & 0x80)
 568                 dib3000mc_set_timing(state, ch->nfft, ch->Bw, 1);
 569
 570         return 0;
 571 }
 572
 573 struct i2c_adapter * dib3000mc_get_tuner_i2c_master(struct dvb_frontend *demod, int gating)
 574 {
 575         struct dib3000mc_state *st = demod->demodulator_priv;
 576         return dibx000_get_i2c_adapter(&st->i2c_master, DIBX000_I2C_INTERFACE_TUNER, gating);
 577 }
 578
 579 EXPORT_SYMBOL(dib3000mc_get_tuner_i2c_master);
 580
 581 static int dib3000mc_get_frontend(struct dvb_frontend* fe,
 582                                 struct dvb_frontend_parameters *fep)
 583 {
 584         struct dib3000mc_state *state = fe->demodulator_priv;
 585         u16 tps = dib3000mc_read_word(state,458);
 586
 587         fep->inversion = INVERSION_AUTO;
 588
 589         fep->u.ofdm.bandwidth = state->current_bandwidth;
 590
 591         switch ((tps >> 8) & 0x1) {
 592                 case 0: fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_2K; break;
 593                 case 1: fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_8K; break;
 594         }
 595
 596         switch (tps & 0x3) {
 597                 case 0: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_32; break;
 598                 case 1: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_16; break;
 599                 case 2: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_8; break;
 600                 case 3: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_4; break;
 601         }
 602
 603         switch ((tps >> 13) & 0x3) {
 604                 case 0: fep->u.ofdm.constellation = QPSK; break;
 605                 case 1: fep->u.ofdm.constellation = QAM_16; break;
 606                 case 2:
 607                 default: fep->u.ofdm.constellation = QAM_64; break;
 608         }
 609
 610         /* as long as the frontend_param structure is fixed for hierarchical transmission I refuse to use it */
 611         /* (tps >> 12) & 0x1 == hrch is used, (tps >> 9) & 0x7 == alpha */
 612
 613         fep->u.ofdm.hierarchy_information = HIERARCHY_NONE;
 614         switch ((tps >> 5) & 0x7) {
 615                 case 1: fep->u.ofdm.code_rate_HP = FEC_1_2; break;
 616                 case 2: fep->u.ofdm.code_rate_HP = FEC_2_3; break;
 617                 case 3: fep->u.ofdm.code_rate_HP = FEC_3_4; break;
 618                 case 5: fep->u.ofdm.code_rate_HP = FEC_5_6; break;
 619                 case 7:
 620                 default: fep->u.ofdm.code_rate_HP = FEC_7_8; break;
 621
 622         }
 623
 624         switch ((tps >> 2) & 0x7) {
 625                 case 1: fep->u.ofdm.code_rate_LP = FEC_1_2; break;
 626                 case 2: fep->u.ofdm.code_rate_LP = FEC_2_3; break;
 627                 case 3: fep->u.ofdm.code_rate_LP = FEC_3_4; break;
 628                 case 5: fep->u.ofdm.code_rate_LP = FEC_5_6; break;
 629                 case 7:
 630                 default: fep->u.ofdm.code_rate_LP = FEC_7_8; break;
 631         }
 632
 633         return 0;
 634 }
 635
 636 static int dib3000mc_set_frontend(struct dvb_frontend* fe,
 637                                 struct dvb_frontend_parameters *fep)
 638 {
 639         struct dib3000mc_state *state = fe->demodulator_priv;
 640         struct dibx000_ofdm_channel ch;
 641
 642         INIT_OFDM_CHANNEL(&ch);
 643         FEP2DIB(fep,&ch);
 644
 645         state->current_bandwidth = fep->u.ofdm.bandwidth;
 646         dib3000mc_set_bandwidth(fe, fep->u.ofdm.bandwidth);
 647
 648         if (fe->ops.tuner_ops.set_params) {
 649                 fe->ops.tuner_ops.set_params(fe, fep);
 650                 msleep(100);
 651         }
 652
 653         if (fep->u.ofdm.transmission_mode == TRANSMISSION_MODE_AUTO ||
 654                 fep->u.ofdm.guard_interval    == GUARD_INTERVAL_AUTO ||
 655                 fep->u.ofdm.constellation     == QAM_AUTO ||
 656                 fep->u.ofdm.code_rate_HP      == FEC_AUTO) {
 657                 int i = 100, found;
 658
 659                 dib3000mc_autosearch_start(fe, &ch);
 660                 do {
 661                         msleep(1);
 662                         found = dib3000mc_autosearch_is_irq(fe);
 663                 } while (found == 0 && i--);
 664
 665                 dprintk("autosearch returns: %d\n",found);
 666                 if (found == 0 || found == 1)
 667                         return 0; // no channel found
 668
 669                 dib3000mc_get_frontend(fe, fep);
 670                 FEP2DIB(fep,&ch);
 671         }
 672
 673         /* make this a config parameter */
 674         dib3000mc_set_output_mode(state, OUTMODE_MPEG2_FIFO);
 675
 676         return dib3000mc_tune(fe, &ch);
 677 }
 678
 679 static int dib3000mc_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 680 {
 681         struct dib3000mc_state *state = fe->demodulator_priv;
 682         u16 lock = dib3000mc_read_word(state, 509);
 683
 684         *stat = 0;
 685
 686         if (lock & 0x8000)
 687                 *stat |= FE_HAS_SIGNAL;
 688         if (lock & 0x3000)
 689                 *stat |= FE_HAS_CARRIER;
 690         if (lock & 0x0100)
 691                 *stat |= FE_HAS_VITERBI;
 692         if (lock & 0x0010)
 693                 *stat |= FE_HAS_SYNC;
 694         if (lock & 0x0008)
 695                 *stat |= FE_HAS_LOCK;
 696
 697         return 0;
 698 }
 699
 700 static int dib3000mc_read_ber(struct dvb_frontend *fe, u32 *ber)
 701 {
 702         struct dib3000mc_state *state = fe->demodulator_priv;
 703         *ber = (dib3000mc_read_word(state, 500) << 16) | dib3000mc_read_word(state, 501);
 704         return 0;
 705 }
 706
 707 static int dib3000mc_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
 708 {
 709         struct dib3000mc_state *state = fe->demodulator_priv;
 710         *unc = dib3000mc_read_word(state, 508);
 711         return 0;
 712 }
 713
 714 static int dib3000mc_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 715 {
 716         struct dib3000mc_state *state = fe->demodulator_priv;
 717         u16 val = dib3000mc_read_word(state, 392);
 718         *strength = 65535 - val;
 719         return 0;
 720 }
 721
 722 static int dib3000mc_read_snr(struct dvb_frontend* fe, u16 *snr)
 723 {
 724         *snr = 0x0000;
 725         return 0;
 726 }
 727
 728 static int dib3000mc_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 729 {
 730         tune->min_delay_ms = 1000;
 731         return 0;
 732 }
 733
 734 static void dib3000mc_release(struct dvb_frontend *fe)
 735 {
 736         struct dib3000mc_state *state = fe->demodulator_priv;
 737         dibx000_exit_i2c_master(&state->i2c_master);
 738         kfree(state);
 739 }
 740
 741 int dib3000mc_pid_control(struct dvb_frontend *fe, int index, int pid,int onoff)
 742 {
 743         struct dib3000mc_state *state = fe->demodulator_priv;
 744         dib3000mc_write_word(state, 212 + index,  onoff ? (1 << 13) | pid : 0);
 745         return 0;
 746 }
 747 EXPORT_SYMBOL(dib3000mc_pid_control);
 748
 749 int dib3000mc_pid_parse(struct dvb_frontend *fe, int onoff)
 750 {
 751         struct dib3000mc_state *state = fe->demodulator_priv;
 752         u16 tmp = dib3000mc_read_word(state, 206) & ~(1 << 4);
 753         tmp |= (onoff << 4);
 754         return dib3000mc_write_word(state, 206, tmp);
 755 }
 756 EXPORT_SYMBOL(dib3000mc_pid_parse);
 757
 758 void dib3000mc_set_config(struct dvb_frontend *fe, struct dib3000mc_config *cfg)
 759 {
 760         struct dib3000mc_state *state = fe->demodulator_priv;
 761         state->cfg = cfg;
 762 }
 763 EXPORT_SYMBOL(dib3000mc_set_config);
 764
 765 int dib3000mc_i2c_enumeration(struct i2c_adapter *i2c, int no_of_demods, u8 default_addr, struct dib3000mc_config cfg[])
 766 {
 767         struct dib3000mc_state st = { .i2c_adap = i2c };
 768         int k;
 769         u8 new_addr;
 770
 771         static u8 DIB3000MC_I2C_ADDRESS[] = {20,22,24,26};
 772
 773         for (k = no_of_demods-1; k >= 0; k--) {
 774                 st.cfg = &cfg[k];
 775
 776                 /* designated i2c address */
 777                 new_addr          = DIB3000MC_I2C_ADDRESS[k];
 778                 st.i2c_addr = new_addr;
 779                 if (dib3000mc_identify(&st) != 0) {
 780                         st.i2c_addr = default_addr;
 781                         if (dib3000mc_identify(&st) != 0) {
 782                                 dprintk("-E-  DiB3000P/MC #%d: not identified\n", k);
 783                                 return -ENODEV;
 784                         }
 785                 }
 786
 787                 dib3000mc_set_output_mode(&st, OUTMODE_MPEG2_PAR_CONT_CLK);
 788
 789                 // set new i2c address and force divstr (Bit 1) to value 0 (Bit 0)
 790                 dib3000mc_write_word(&st, 1024, (new_addr << 3) | 0x1);
 791                 st.i2c_addr = new_addr;
 792         }
 793
 794         for (k = 0; k < no_of_demods; k++) {
 795                 st.cfg = &cfg[k];
 796                 st.i2c_addr = DIB3000MC_I2C_ADDRESS[k];
 797
 798                 dib3000mc_write_word(&st, 1024, st.i2c_addr << 3);
 799
 800                 /* turn off data output */
 801                 dib3000mc_set_output_mode(&st, OUTMODE_HIGH_Z);
 802         }
 803         return 0;
 804 }
 805 EXPORT_SYMBOL(dib3000mc_i2c_enumeration);
 806
 807 static struct dvb_frontend_ops dib3000mc_ops;
 808
 809 struct dvb_frontend * dib3000mc_attach(struct i2c_adapter *i2c_adap, u8 i2c_addr, struct dib3000mc_config *cfg)
 810 {
 811         struct dvb_frontend *demod;
 812         struct dib3000mc_state *st;
 813         st = kzalloc(sizeof(struct dib3000mc_state), GFP_KERNEL);
 814         if (st == NULL)
 815                 return NULL;
 816
 817         st->cfg = cfg;
 818         st->i2c_adap = i2c_adap;
 819         st->i2c_addr = i2c_addr;
 820
 821         demod                   = &st->demod;
 822         demod->demodulator_priv = st;
 823         memcpy(&st->demod.ops, &dib3000mc_ops, sizeof(struct dvb_frontend_ops));
 824
 825         if (dib3000mc_identify(st) != 0)
 826                 goto error;
 827
 828         dibx000_init_i2c_master(&st->i2c_master, DIB3000MC, st->i2c_adap, st->i2c_addr);
 829
 830         dib3000mc_write_word(st, 1037, 0x3130);
 831
 832         return demod;
 833
 834 error:
 835         kfree(st);
 836         return NULL;
 837 }
 838 EXPORT_SYMBOL(dib3000mc_attach);
 839
 840 static struct dvb_frontend_ops dib3000mc_ops = {
 841         .info = {
 842                 .name = "DiBcom 3000MC/P",
 843                 .type = FE_OFDM,
 844                 .frequency_min      = 44250000,
 845                 .frequency_max      = 867250000,
 846                 .frequency_stepsize = 62500,
 847                 .caps = FE_CAN_INVERSION_AUTO |
 848                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 849                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 850                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 851                         FE_CAN_TRANSMISSION_MODE_AUTO |
 852                         FE_CAN_GUARD_INTERVAL_AUTO |
 853                         FE_CAN_RECOVER |
 854                         FE_CAN_HIERARCHY_AUTO,
 855         },
 856
 857         .release              = dib3000mc_release,
 858
 859         .init                 = dib3000mc_init,
 860         .sleep                = dib3000mc_sleep,
 861
 862         .set_frontend         = dib3000mc_set_frontend,
 863         .get_tune_settings    = dib3000mc_fe_get_tune_settings,
 864         .get_frontend         = dib3000mc_get_frontend,
 865
 866         .read_status          = dib3000mc_read_status,
 867         .read_ber             = dib3000mc_read_ber,
 868         .read_signal_strength = dib3000mc_read_signal_strength,
 869         .read_snr             = dib3000mc_read_snr,
 870         .read_ucblocks        = dib3000mc_read_unc_blocks,
 871 };
 872
 873 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 874 MODULE_DESCRIPTION("Driver for the DiBcom 3000MC/P COFDM demodulator");
 875 MODULE_LICENSE("GPL");