drivers/media/dvb-frontends/lgs8gxx.c

   1 /*
   2  *    Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
   3  *    LGS8913, LGS8GL5, LGS8G75
   4  *    experimental support LGS8G42, LGS8G52
   5  *
   6  *    Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
   7  *    Copyright (C) 2008 Sirius International (Hong Kong) Limited
   8  *    Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
   9  *
  10  *    This program is free software; you can redistribute it and/or modify
  11  *    it under the terms of the GNU General Public License as published by
  12  *    the Free Software Foundation; either version 2 of the License, or
  13  *    (at your option) any later version.
  14  *
  15  *    This program is distributed in the hope that it will be useful,
  16  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *    GNU General Public License for more details.
  19  *
  20  */
  21
  22 #include <asm/div64.h>
  23 #include <linux/firmware.h>
  24
  25 #include "dvb_frontend.h"
  26
  27 #include "lgs8gxx.h"
  28 #include "lgs8gxx_priv.h"
  29
  30 #define dprintk(args...) \
  31         do { \
  32                 if (debug) \
  33                         printk(KERN_DEBUG "lgs8gxx: " args); \
  34         } while (0)
  35
  36 static int debug;
  37 static int fake_signal_str = 1;
  38
  39 #define LGS8GXX_FIRMWARE "lgs8g75.fw"
  40
  41 module_param(debug, int, 0644);
  42 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
  43
  44 module_param(fake_signal_str, int, 0644);
  45 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
  46 "Signal strength calculation is slow.(default:on).");
  47
  48 /* LGS8GXX internal helper functions */
  49
  50 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
  51 {
  52         int ret;
  53         u8 buf[] = { reg, data };
  54         struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
  55
  56         msg.addr = priv->config->demod_address;
  57         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  58                 msg.addr += 0x02;
  59
  60         if (debug >= 2)
  61                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
  62
  63         ret = i2c_transfer(priv->i2c, &msg, 1);
  64
  65         if (ret != 1)
  66                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
  67                         __func__, reg, data, ret);
  68
  69         return (ret != 1) ? -1 : 0;
  70 }
  71
  72 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
  73 {
  74         int ret;
  75         u8 dev_addr;
  76
  77         u8 b0[] = { reg };
  78         u8 b1[] = { 0 };
  79         struct i2c_msg msg[] = {
  80                 { .flags = 0, .buf = b0, .len = 1 },
  81                 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
  82         };
  83
  84         dev_addr = priv->config->demod_address;
  85         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  86                 dev_addr += 0x02;
  87         msg[1].addr =  msg[0].addr = dev_addr;
  88
  89         ret = i2c_transfer(priv->i2c, msg, 2);
  90         if (ret != 2) {
  91                 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
  92                 return -1;
  93         }
  94
  95         *p_data = b1[0];
  96         if (debug >= 2)
  97                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
  98         return 0;
  99 }
 100
 101 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
 102 {
 103         lgs8gxx_write_reg(priv, 0x02, 0x00);
 104         msleep(1);
 105         lgs8gxx_write_reg(priv, 0x02, 0x01);
 106         msleep(100);
 107
 108         return 0;
 109 }
 110
 111 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
 112         u8 val, u8 delay, u8 tries)
 113 {
 114         u8 t;
 115         int i;
 116
 117         for (i = 0; i < tries; i++) {
 118                 lgs8gxx_read_reg(priv, reg, &t);
 119
 120                 if ((t & mask) == val)
 121                         return 0;
 122                 msleep(delay);
 123         }
 124
 125         return 1;
 126 }
 127
 128 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
 129 {
 130         const struct lgs8gxx_config *config = priv->config;
 131         u8 if_conf;
 132
 133         if_conf = 0x10; /* AGC output on, RF_AGC output off; */
 134
 135         if_conf |=
 136                 ((config->ext_adc) ? 0x80 : 0x00) |
 137                 ((config->if_neg_center) ? 0x04 : 0x00) |
 138                 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
 139                 ((config->adc_signed) ? 0x02 : 0x00) |
 140                 ((config->if_neg_edge) ? 0x01 : 0x00);
 141
 142         if (config->ext_adc &&
 143                 (config->prod == LGS8GXX_PROD_LGS8G52)) {
 144                 lgs8gxx_write_reg(priv, 0xBA, 0x40);
 145         }
 146
 147         lgs8gxx_write_reg(priv, 0x07, if_conf);
 148
 149         return 0;
 150 }
 151
 152 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
 153 {
 154         u64 val;
 155         u32 v32;
 156         u32 if_clk;
 157
 158         if_clk = priv->config->if_clk_freq;
 159
 160         val = freq;
 161         if (freq != 0) {
 162                 val <<= 32;
 163                 if (if_clk != 0)
 164                         do_div(val, if_clk);
 165                 v32 = val & 0xFFFFFFFF;
 166                 dprintk("Set IF Freq to %dkHz\n", freq);
 167         } else {
 168                 v32 = 0;
 169                 dprintk("Set IF Freq to baseband\n");
 170         }
 171         dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
 172
 173         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 174                 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
 175                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
 176                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
 177                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
 178         } else {
 179                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
 180                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
 181                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
 182                 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
 189 {
 190         u64 val;
 191         u32 v32 = 0;
 192         u8 reg_addr, t;
 193         int i;
 194
 195         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 196                 reg_addr = 0x23;
 197         else
 198                 reg_addr = 0x48;
 199
 200         for (i = 0; i < 4; i++) {
 201                 lgs8gxx_read_reg(priv, reg_addr, &t);
 202                 v32 <<= 8;
 203                 v32 |= t;
 204                 reg_addr--;
 205         }
 206
 207         val = v32;
 208         val *= priv->config->if_clk_freq;
 209         val >>= 32;
 210         dprintk("AFC = %u kHz\n", (u32)val);
 211         return 0;
 212 }
 213
 214 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
 215 {
 216         u8 t;
 217         u8 prod = priv->config->prod;
 218
 219         if (prod == LGS8GXX_PROD_LGS8913)
 220                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 221
 222         if (prod == LGS8GXX_PROD_LGS8G75) {
 223                 lgs8gxx_read_reg(priv, 0x0C, &t);
 224                 t &= (~0x04);
 225                 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
 226                 lgs8gxx_write_reg(priv, 0x39, 0x00);
 227                 lgs8gxx_write_reg(priv, 0x3D, 0x04);
 228         } else if (prod == LGS8GXX_PROD_LGS8913 ||
 229                 prod == LGS8GXX_PROD_LGS8GL5 ||
 230                 prod == LGS8GXX_PROD_LGS8G42 ||
 231                 prod == LGS8GXX_PROD_LGS8G52 ||
 232                 prod == LGS8GXX_PROD_LGS8G54) {
 233                 lgs8gxx_read_reg(priv, 0x7E, &t);
 234                 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
 235
 236                 /* clear FEC self reset */
 237                 lgs8gxx_read_reg(priv, 0xC5, &t);
 238                 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
 239         }
 240
 241         if (prod == LGS8GXX_PROD_LGS8913) {
 242                 /* FEC auto detect */
 243                 lgs8gxx_write_reg(priv, 0xC1, 0x03);
 244
 245                 lgs8gxx_read_reg(priv, 0x7C, &t);
 246                 t = (t & 0x8C) | 0x03;
 247                 lgs8gxx_write_reg(priv, 0x7C, t);
 248
 249                 /* BER test mode */
 250                 lgs8gxx_read_reg(priv, 0xC3, &t);
 251                 t = (t & 0xEF) |  0x10;
 252                 lgs8gxx_write_reg(priv, 0xC3, t);
 253         }
 254
 255         if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
 256                 lgs8gxx_write_reg(priv, 0xD9, 0x40);
 257
 258         return 0;
 259 }
 260
 261 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
 262 {
 263         u8 t;
 264
 265         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 266                 u8 t2;
 267                 lgs8gxx_read_reg(priv, 0x0C, &t);
 268                 t &= (~0x80);
 269                 lgs8gxx_write_reg(priv, 0x0C, t);
 270
 271                 lgs8gxx_read_reg(priv, 0x0C, &t);
 272                 lgs8gxx_read_reg(priv, 0x19, &t2);
 273
 274                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 275                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 276                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 277                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 278                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 279                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 280                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 281                 } else {
 282                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 283                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 284                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 285                 }
 286
 287                 lgs8gxx_soft_reset(priv);
 288                 return 0;
 289         }
 290
 291         /* turn off auto-detect; manual settings */
 292         lgs8gxx_write_reg(priv, 0x7E, 0);
 293         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 294                 lgs8gxx_write_reg(priv, 0xC1, 0);
 295
 296         lgs8gxx_read_reg(priv, 0xC5, &t);
 297         t = (t & 0xE0) | 0x06;
 298         lgs8gxx_write_reg(priv, 0xC5, t);
 299
 300         lgs8gxx_soft_reset(priv);
 301
 302         return 0;
 303 }
 304
 305 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 306 {
 307         int ret = 0;
 308         u8 t;
 309
 310         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 311                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 312         else
 313                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 314         if (ret != 0)
 315                 return ret;
 316
 317         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 318                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 319         else
 320                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 321         return 0;
 322 }
 323
 324 /* Wait for Code Acquisition Lock */
 325 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 326 {
 327         int ret = 0;
 328         u8 reg, mask, val;
 329
 330         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 331                 reg = 0x13;
 332                 mask = 0x80;
 333                 val = 0x80;
 334         } else {
 335                 reg = 0x4B;
 336                 mask = 0xC0;
 337                 val = 0xC0;
 338         }
 339
 340         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 341         *locked = (ret == 0) ? 1 : 0;
 342
 343         return 0;
 344 }
 345
 346 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 347                                           u8 *finished)
 348 {
 349         int ret = 0;
 350         u8 reg, mask, val;
 351
 352         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 353                 reg = 0x1f;
 354                 mask = 0xC0;
 355                 val = 0x80;
 356         } else {
 357                 reg = 0xA4;
 358                 mask = 0x03;
 359                 val = 0x01;
 360         }
 361
 362         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 363         *finished = (ret == 0) ? 1 : 0;
 364
 365         return 0;
 366 }
 367
 368 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 369         u8 *locked)
 370 {
 371         int err = 0;
 372         u8 ad_fini = 0;
 373         u8 t1, t2;
 374
 375         if (gi == GI_945)
 376                 dprintk("try GI 945\n");
 377         else if (gi == GI_595)
 378                 dprintk("try GI 595\n");
 379         else if (gi == GI_420)
 380                 dprintk("try GI 420\n");
 381         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 382                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 383                 lgs8gxx_read_reg(priv, 0x18, &t2);
 384                 t1 &= ~(GI_MASK);
 385                 t1 |= gi;
 386                 t2 &= 0xFE;
 387                 t2 |= cpn ? 0x01 : 0x00;
 388                 lgs8gxx_write_reg(priv, 0x0C, t1);
 389                 lgs8gxx_write_reg(priv, 0x18, t2);
 390         } else {
 391                 lgs8gxx_write_reg(priv, 0x04, gi);
 392         }
 393         lgs8gxx_soft_reset(priv);
 394         err = lgs8gxx_wait_ca_lock(priv, locked);
 395         if (err || !(*locked))
 396                 return err;
 397         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 398         if (err != 0)
 399                 return err;
 400         if (ad_fini) {
 401                 dprintk("auto detect finished\n");
 402         } else
 403                 *locked = 0;
 404
 405         return 0;
 406 }
 407
 408 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 409                                u8 *detected_param, u8 *gi)
 410 {
 411         int i, j;
 412         int err = 0;
 413         u8 locked = 0, tmp_gi;
 414
 415         dprintk("%s\n", __func__);
 416
 417         lgs8gxx_set_mode_auto(priv);
 418         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 419                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 420                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 421         } else {
 422                 /* Guard Interval */
 423                 lgs8gxx_write_reg(priv, 0x03, 00);
 424         }
 425
 426         for (i = 0; i < 2; i++) {
 427                 for (j = 0; j < 2; j++) {
 428                         tmp_gi = GI_945;
 429                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 430                         if (err)
 431                                 goto out;
 432                         if (locked)
 433                                 goto locked;
 434                 }
 435                 for (j = 0; j < 2; j++) {
 436                         tmp_gi = GI_420;
 437                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 438                         if (err)
 439                                 goto out;
 440                         if (locked)
 441                                 goto locked;
 442                 }
 443                 tmp_gi = GI_595;
 444                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 445                 if (err)
 446                         goto out;
 447                 if (locked)
 448                         goto locked;
 449         }
 450
 451 locked:
 452         if ((err == 0) && (locked == 1)) {
 453                 u8 t;
 454
 455                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 456                         lgs8gxx_read_reg(priv, 0xA2, &t);
 457                         *detected_param = t;
 458                 } else {
 459                         lgs8gxx_read_reg(priv, 0x1F, &t);
 460                         *detected_param = t & 0x3F;
 461                 }
 462
 463                 if (tmp_gi == GI_945)
 464                         dprintk("GI 945 locked\n");
 465                 else if (tmp_gi == GI_595)
 466                         dprintk("GI 595 locked\n");
 467                 else if (tmp_gi == GI_420)
 468                         dprintk("GI 420 locked\n");
 469                 *gi = tmp_gi;
 470         }
 471         if (!locked)
 472                 err = -1;
 473
 474 out:
 475         return err;
 476 }
 477
 478 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 479 {
 480         s8 err;
 481         u8 gi = 0x2;
 482         u8 detected_param = 0;
 483
 484         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 485
 486         if (err != 0) {
 487                 dprintk("lgs8gxx_auto_detect failed\n");
 488         } else
 489                 dprintk("detected param = 0x%02X\n", detected_param);
 490
 491         /* Apply detected parameters */
 492         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 493                 u8 inter_leave_len = detected_param & TIM_MASK ;
 494                 /* Fix 8913 time interleaver detection bug */
 495                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 496                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 497                 detected_param |= inter_leave_len;
 498         }
 499         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 500                 u8 t;
 501                 lgs8gxx_read_reg(priv, 0x19, &t);
 502                 t &= 0x81;
 503                 t |= detected_param << 1;
 504                 lgs8gxx_write_reg(priv, 0x19, t);
 505         } else {
 506                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 507                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 508                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 509         }
 510         /* lgs8gxx_soft_reset(priv); */
 511
 512         /* Enter manual mode */
 513         lgs8gxx_set_mode_manual(priv);
 514
 515         switch (gi) {
 516         case GI_945:
 517                 priv->curr_gi = 945; break;
 518         case GI_595:
 519                 priv->curr_gi = 595; break;
 520         case GI_420:
 521                 priv->curr_gi = 420; break;
 522         default:
 523                 priv->curr_gi = 945; break;
 524         }
 525 }
 526
 527 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 528         u8 serial, u8 clk_pol, u8 clk_gated)
 529 {
 530         int ret = 0;
 531         u8 t, reg_addr;
 532
 533         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 534         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 535         if (ret != 0)
 536                 return ret;
 537
 538         t &= 0xF8;
 539         t |= serial ? TS_SERIAL : TS_PARALLEL;
 540         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 541         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 542
 543         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 544         if (ret != 0)
 545                 return ret;
 546
 547         return 0;
 548 }
 549
 550 /* A/D input peak-to-peak voltage range */
 551 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 552         u8 sel)
 553 {
 554         u8 r26 = 0x73, r27 = 0x90;
 555
 556         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 557                 return 0;
 558
 559         r26 |= (sel & 0x01) << 7;
 560         r27 |= (sel & 0x02) >> 1;
 561         lgs8gxx_write_reg(priv, 0x26, r26);
 562         lgs8gxx_write_reg(priv, 0x27, r27);
 563
 564         return 0;
 565 }
 566
 567 /* LGS8913 demod frontend functions */
 568
 569 static int lgs8913_init(struct lgs8gxx_state *priv)
 570 {
 571         u8 t;
 572
 573         /* LGS8913 specific */
 574         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 575
 576         lgs8gxx_read_reg(priv, 0x7c, &t);
 577         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 578
 579         /* LGS8913 specific */
 580         lgs8gxx_read_reg(priv, 0xc3, &t);
 581         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 582
 583
 584         return 0;
 585 }
 586
 587 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 588 {
 589         const struct firmware *fw;
 590         int rc;
 591         int i;
 592
 593         rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
 594         if (rc)
 595                 return rc;
 596
 597         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 598
 599         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 600         lgs8gxx_write_reg(priv, 0x39, 0x00);
 601
 602         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 603         lgs8gxx_write_reg(priv, 0x38, 0x00);
 604         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 605         lgs8gxx_write_reg(priv, 0x38, 0x00);
 606
 607         for (i = 0; i < fw->size; i++) {
 608                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 609                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 610                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 611                 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
 612         }
 613
 614         lgs8gxx_write_reg(priv, 0x38, 0x00);
 615
 616         release_firmware(fw);
 617         return 0;
 618 }
 619
 620 static int lgs8gxx_init(struct dvb_frontend *fe)
 621 {
 622         struct lgs8gxx_state *priv =
 623                 (struct lgs8gxx_state *)fe->demodulator_priv;
 624         const struct lgs8gxx_config *config = priv->config;
 625         u8 data = 0;
 626         s8 err;
 627         dprintk("%s\n", __func__);
 628
 629         lgs8gxx_read_reg(priv, 0, &data);
 630         dprintk("reg 0 = 0x%02X\n", data);
 631
 632         if (config->prod == LGS8GXX_PROD_LGS8G75)
 633                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 634
 635         /* Setup MPEG output format */
 636         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 637                                     config->ts_clk_pol,
 638                                     config->ts_clk_gated);
 639         if (err != 0)
 640                 return -EIO;
 641
 642         if (config->prod == LGS8GXX_PROD_LGS8913)
 643                 lgs8913_init(priv);
 644         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 645         lgs8gxx_set_ad_mode(priv);
 646
 647         return 0;
 648 }
 649
 650 static void lgs8gxx_release(struct dvb_frontend *fe)
 651 {
 652         struct lgs8gxx_state *state = fe->demodulator_priv;
 653         dprintk("%s\n", __func__);
 654
 655         kfree(state);
 656 }
 657
 658
 659 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
 660 {
 661         struct lgs8gxx_state *priv = fe->demodulator_priv;
 662
 663         if (len != 2)
 664                 return -EINVAL;
 665
 666         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 667 }
 668
 669 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
 670 {
 671         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 672         struct lgs8gxx_state *priv = fe->demodulator_priv;
 673
 674         dprintk("%s\n", __func__);
 675
 676         /* set frequency */
 677         if (fe->ops.tuner_ops.set_params) {
 678                 fe->ops.tuner_ops.set_params(fe);
 679                 if (fe->ops.i2c_gate_ctrl)
 680                         fe->ops.i2c_gate_ctrl(fe, 0);
 681         }
 682
 683         /* start auto lock */
 684         lgs8gxx_auto_lock(priv);
 685
 686         msleep(10);
 687
 688         /* TODO: get real readings from device */
 689
 690         /* bandwidth */
 691         fe_params->bandwidth_hz = 8000000;
 692
 693         fe_params->code_rate_HP = FEC_AUTO;
 694         fe_params->code_rate_LP = FEC_AUTO;
 695
 696         fe_params->modulation = QAM_AUTO;
 697
 698         /* transmission mode */
 699         fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
 700
 701         /* guard interval */
 702         fe_params->guard_interval = GUARD_INTERVAL_AUTO;
 703
 704         /* hierarchy */
 705         fe_params->hierarchy = HIERARCHY_NONE;
 706
 707         return 0;
 708 }
 709
 710 static
 711 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 712                               struct dvb_frontend_tune_settings *fesettings)
 713 {
 714         /* FIXME: copy from tda1004x.c */
 715         fesettings->min_delay_ms = 800;
 716         fesettings->step_size = 0;
 717         fesettings->max_drift = 0;
 718         return 0;
 719 }
 720
 721 static int lgs8gxx_read_status(struct dvb_frontend *fe,
 722                                enum fe_status *fe_status)
 723 {
 724         struct lgs8gxx_state *priv = fe->demodulator_priv;
 725         s8 ret;
 726         u8 t, locked = 0;
 727
 728         dprintk("%s\n", __func__);
 729         *fe_status = 0;
 730
 731         lgs8gxx_get_afc_phase(priv);
 732         lgs8gxx_is_locked(priv, &locked);
 733         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 734                 if (locked)
 735                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 736                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 737                 return 0;
 738         }
 739
 740         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 741         if (ret != 0)
 742                 return -EIO;
 743
 744         dprintk("Reg 0x4B: 0x%02X\n", t);
 745
 746         *fe_status = 0;
 747         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 748                 if ((t & 0x40) == 0x40)
 749                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 750                 if ((t & 0x80) == 0x80)
 751                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 752                                 FE_HAS_LOCK;
 753         } else {
 754                 if ((t & 0x80) == 0x80)
 755                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 756                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 757         }
 758
 759         /* success */
 760         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 761         return 0;
 762 }
 763
 764 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 765 {
 766         u16 v;
 767         u8 agc_lvl[2], cat;
 768
 769         dprintk("%s()\n", __func__);
 770         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 771         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 772
 773         v = agc_lvl[0];
 774         v <<= 8;
 775         v |= agc_lvl[1];
 776
 777         dprintk("agc_lvl: 0x%04X\n", v);
 778
 779         if (v < 0x100)
 780                 cat = 0;
 781         else if (v < 0x190)
 782                 cat = 5;
 783         else if (v < 0x2A8)
 784                 cat = 4;
 785         else if (v < 0x381)
 786                 cat = 3;
 787         else if (v < 0x400)
 788                 cat = 2;
 789         else if (v == 0x400)
 790                 cat = 1;
 791         else
 792                 cat = 0;
 793
 794         *signal = cat * 65535 / 5;
 795
 796         return 0;
 797 }
 798
 799 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 800 {
 801         u8 t; s8 ret;
 802         s16 max_strength = 0;
 803         u8 str;
 804         u16 i, gi = priv->curr_gi;
 805
 806         dprintk("%s\n", __func__);
 807
 808         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 809         if (ret != 0)
 810                 return -EIO;
 811
 812         if (fake_signal_str) {
 813                 if ((t & 0xC0) == 0xC0) {
 814                         dprintk("Fake signal strength\n");
 815                         *signal = 0x7FFF;
 816                 } else
 817                         *signal = 0;
 818                 return 0;
 819         }
 820
 821         dprintk("gi = %d\n", gi);
 822         for (i = 0; i < gi; i++) {
 823
 824                 if ((i & 0xFF) == 0)
 825                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 826                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 827
 828                 lgs8gxx_read_reg(priv, 0x94, &str);
 829                 if (max_strength < str)
 830                         max_strength = str;
 831         }
 832
 833         *signal = max_strength;
 834         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 835
 836         lgs8gxx_read_reg(priv, 0x95, &t);
 837         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 838
 839         return 0;
 840 }
 841
 842 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 843 {
 844         u8 t;
 845         s16 v = 0;
 846
 847         dprintk("%s\n", __func__);
 848
 849         lgs8gxx_read_reg(priv, 0xB1, &t);
 850         v |= t;
 851         v <<= 8;
 852         lgs8gxx_read_reg(priv, 0xB0, &t);
 853         v |= t;
 854
 855         *signal = v;
 856         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 857
 858         return 0;
 859 }
 860
 861 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 862 {
 863         struct lgs8gxx_state *priv = fe->demodulator_priv;
 864
 865         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 866                 return lgs8913_read_signal_strength(priv, signal);
 867         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 868                 return lgs8g75_read_signal_strength(priv, signal);
 869         else
 870                 return lgs8gxx_read_signal_agc(priv, signal);
 871 }
 872
 873 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 874 {
 875         struct lgs8gxx_state *priv = fe->demodulator_priv;
 876         u8 t;
 877         *snr = 0;
 878
 879         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 880                 lgs8gxx_read_reg(priv, 0x34, &t);
 881         else
 882                 lgs8gxx_read_reg(priv, 0x95, &t);
 883         dprintk("AVG Noise=0x%02X\n", t);
 884         *snr = 256 - t;
 885         *snr <<= 8;
 886         dprintk("snr=0x%x\n", *snr);
 887
 888         return 0;
 889 }
 890
 891 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 892 {
 893         *ucblocks = 0;
 894         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 895         return 0;
 896 }
 897
 898 static void packet_counter_start(struct lgs8gxx_state *priv)
 899 {
 900         u8 orig, t;
 901
 902         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 903                 lgs8gxx_read_reg(priv, 0x30, &orig);
 904                 orig &= 0xE7;
 905                 t = orig | 0x10;
 906                 lgs8gxx_write_reg(priv, 0x30, t);
 907                 t = orig | 0x18;
 908                 lgs8gxx_write_reg(priv, 0x30, t);
 909                 t = orig | 0x10;
 910                 lgs8gxx_write_reg(priv, 0x30, t);
 911         } else {
 912                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 913                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 914                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 915         }
 916 }
 917
 918 static void packet_counter_stop(struct lgs8gxx_state *priv)
 919 {
 920         u8 t;
 921
 922         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 923                 lgs8gxx_read_reg(priv, 0x30, &t);
 924                 t &= 0xE7;
 925                 lgs8gxx_write_reg(priv, 0x30, t);
 926         } else {
 927                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 928         }
 929 }
 930
 931 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 932 {
 933         struct lgs8gxx_state *priv = fe->demodulator_priv;
 934         u8 reg_err, reg_total, t;
 935         u32 total_cnt = 0, err_cnt = 0;
 936         int i;
 937
 938         dprintk("%s\n", __func__);
 939
 940         packet_counter_start(priv);
 941         msleep(200);
 942         packet_counter_stop(priv);
 943
 944         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 945                 reg_total = 0x28; reg_err = 0x2C;
 946         } else {
 947                 reg_total = 0xD0; reg_err = 0xD4;
 948         }
 949
 950         for (i = 0; i < 4; i++) {
 951                 total_cnt <<= 8;
 952                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 953                 total_cnt |= t;
 954         }
 955         for (i = 0; i < 4; i++) {
 956                 err_cnt <<= 8;
 957                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
 958                 err_cnt |= t;
 959         }
 960         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
 961
 962         if (total_cnt == 0)
 963                 *ber = 0;
 964         else
 965                 *ber = err_cnt * 100 / total_cnt;
 966
 967         dprintk("%s: ber=0x%x\n", __func__, *ber);
 968         return 0;
 969 }
 970
 971 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 972 {
 973         struct lgs8gxx_state *priv = fe->demodulator_priv;
 974
 975         if (priv->config->tuner_address == 0)
 976                 return 0;
 977         if (enable) {
 978                 u8 v = 0x80 | priv->config->tuner_address;
 979                 return lgs8gxx_write_reg(priv, 0x01, v);
 980         }
 981         return lgs8gxx_write_reg(priv, 0x01, 0);
 982 }
 983
 984 static const struct dvb_frontend_ops lgs8gxx_ops = {
 985         .delsys = { SYS_DTMB },
 986         .info = {
 987                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
 988                 .frequency_min = 474000000,
 989                 .frequency_max = 858000000,
 990                 .frequency_stepsize = 10000,
 991                 .caps =
 992                         FE_CAN_FEC_AUTO |
 993                         FE_CAN_QAM_AUTO |
 994                         FE_CAN_TRANSMISSION_MODE_AUTO |
 995                         FE_CAN_GUARD_INTERVAL_AUTO
 996         },
 997
 998         .release = lgs8gxx_release,
 999
1000         .init = lgs8gxx_init,
1001         .write = lgs8gxx_write,
1002         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1003
1004         .set_frontend = lgs8gxx_set_fe,
1005         .get_tune_settings = lgs8gxx_get_tune_settings,
1006
1007         .read_status = lgs8gxx_read_status,
1008         .read_ber = lgs8gxx_read_ber,
1009         .read_signal_strength = lgs8gxx_read_signal_strength,
1010         .read_snr = lgs8gxx_read_snr,
1011         .read_ucblocks = lgs8gxx_read_ucblocks,
1012 };
1013
1014 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1015         struct i2c_adapter *i2c)
1016 {
1017         struct lgs8gxx_state *priv = NULL;
1018         u8 data = 0;
1019
1020         dprintk("%s()\n", __func__);
1021
1022         if (config == NULL || i2c == NULL)
1023                 return NULL;
1024
1025         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1026         if (priv == NULL)
1027                 goto error_out;
1028
1029         priv->config = config;
1030         priv->i2c = i2c;
1031
1032         /* check if the demod is there */
1033         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1034                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1035                         __func__, priv->config->demod_address);
1036                 goto error_out;
1037         }
1038
1039         lgs8gxx_read_reg(priv, 1, &data);
1040
1041         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1042                sizeof(struct dvb_frontend_ops));
1043         priv->frontend.demodulator_priv = priv;
1044
1045         if (config->prod == LGS8GXX_PROD_LGS8G75)
1046                 lgs8g75_init_data(priv);
1047
1048         return &priv->frontend;
1049
1050 error_out:
1051         dprintk("%s() error_out\n", __func__);
1052         kfree(priv);
1053         return NULL;
1054
1055 }
1056 EXPORT_SYMBOL(lgs8gxx_attach);
1057
1058 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1059 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1060 MODULE_LICENSE("GPL");
1061 MODULE_FIRMWARE(LGS8GXX_FIRMWARE);