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  *    You should have received a copy of the GNU General Public License
  21  *    along with this program; if not, write to the Free Software
  22  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  */
  25
  26 #include <asm/div64.h>
  27 #include <linux/firmware.h>
  28
  29 #include "dvb_frontend.h"
  30
  31 #include "lgs8gxx.h"
  32 #include "lgs8gxx_priv.h"
  33
  34 #define dprintk(args...) \
  35         do { \
  36                 if (debug) \
  37                         printk(KERN_DEBUG "lgs8gxx: " args); \
  38         } while (0)
  39
  40 static int debug;
  41 static int fake_signal_str = 1;
  42
  43 module_param(debug, int, 0644);
  44 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
  45
  46 module_param(fake_signal_str, int, 0644);
  47 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
  48 "Signal strength calculation is slow.(default:on).");
  49
  50 /* LGS8GXX internal helper functions */
  51
  52 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
  53 {
  54         int ret;
  55         u8 buf[] = { reg, data };
  56         struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
  57
  58         msg.addr = priv->config->demod_address;
  59         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  60                 msg.addr += 0x02;
  61
  62         if (debug >= 2)
  63                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
  64
  65         ret = i2c_transfer(priv->i2c, &msg, 1);
  66
  67         if (ret != 1)
  68                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
  69                         __func__, reg, data, ret);
  70
  71         return (ret != 1) ? -1 : 0;
  72 }
  73
  74 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
  75 {
  76         int ret;
  77         u8 dev_addr;
  78
  79         u8 b0[] = { reg };
  80         u8 b1[] = { 0 };
  81         struct i2c_msg msg[] = {
  82                 { .flags = 0, .buf = b0, .len = 1 },
  83                 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
  84         };
  85
  86         dev_addr = priv->config->demod_address;
  87         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  88                 dev_addr += 0x02;
  89         msg[1].addr =  msg[0].addr = dev_addr;
  90
  91         ret = i2c_transfer(priv->i2c, msg, 2);
  92         if (ret != 2) {
  93                 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
  94                 return -1;
  95         }
  96
  97         *p_data = b1[0];
  98         if (debug >= 2)
  99                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
 100         return 0;
 101 }
 102
 103 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
 104 {
 105         lgs8gxx_write_reg(priv, 0x02, 0x00);
 106         msleep(1);
 107         lgs8gxx_write_reg(priv, 0x02, 0x01);
 108         msleep(100);
 109
 110         return 0;
 111 }
 112
 113 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
 114         u8 val, u8 delay, u8 tries)
 115 {
 116         u8 t;
 117         int i;
 118
 119         for (i = 0; i < tries; i++) {
 120                 lgs8gxx_read_reg(priv, reg, &t);
 121
 122                 if ((t & mask) == val)
 123                         return 0;
 124                 msleep(delay);
 125         }
 126
 127         return 1;
 128 }
 129
 130 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
 131 {
 132         const struct lgs8gxx_config *config = priv->config;
 133         u8 if_conf;
 134
 135         if_conf = 0x10; /* AGC output on, RF_AGC output off; */
 136
 137         if_conf |=
 138                 ((config->ext_adc) ? 0x80 : 0x00) |
 139                 ((config->if_neg_center) ? 0x04 : 0x00) |
 140                 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
 141                 ((config->adc_signed) ? 0x02 : 0x00) |
 142                 ((config->if_neg_edge) ? 0x01 : 0x00);
 143
 144         if (config->ext_adc &&
 145                 (config->prod == LGS8GXX_PROD_LGS8G52)) {
 146                 lgs8gxx_write_reg(priv, 0xBA, 0x40);
 147         }
 148
 149         lgs8gxx_write_reg(priv, 0x07, if_conf);
 150
 151         return 0;
 152 }
 153
 154 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
 155 {
 156         u64 val;
 157         u32 v32;
 158         u32 if_clk;
 159
 160         if_clk = priv->config->if_clk_freq;
 161
 162         val = freq;
 163         if (freq != 0) {
 164                 val <<= 32;
 165                 if (if_clk != 0)
 166                         do_div(val, if_clk);
 167                 v32 = val & 0xFFFFFFFF;
 168                 dprintk("Set IF Freq to %dkHz\n", freq);
 169         } else {
 170                 v32 = 0;
 171                 dprintk("Set IF Freq to baseband\n");
 172         }
 173         dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
 174
 175         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 176                 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
 177                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
 178                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
 179                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
 180         } else {
 181                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
 182                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
 183                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
 184                 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
 185         }
 186
 187         return 0;
 188 }
 189
 190 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
 191 {
 192         u64 val;
 193         u32 v32 = 0;
 194         u8 reg_addr, t;
 195         int i;
 196
 197         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 198                 reg_addr = 0x23;
 199         else
 200                 reg_addr = 0x48;
 201
 202         for (i = 0; i < 4; i++) {
 203                 lgs8gxx_read_reg(priv, reg_addr, &t);
 204                 v32 <<= 8;
 205                 v32 |= t;
 206                 reg_addr--;
 207         }
 208
 209         val = v32;
 210         val *= priv->config->if_clk_freq;
 211         val >>= 32;
 212         dprintk("AFC = %u kHz\n", (u32)val);
 213         return 0;
 214 }
 215
 216 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
 217 {
 218         u8 t;
 219         u8 prod = priv->config->prod;
 220
 221         if (prod == LGS8GXX_PROD_LGS8913)
 222                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 223
 224         if (prod == LGS8GXX_PROD_LGS8G75) {
 225                 lgs8gxx_read_reg(priv, 0x0C, &t);
 226                 t &= (~0x04);
 227                 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
 228                 lgs8gxx_write_reg(priv, 0x39, 0x00);
 229                 lgs8gxx_write_reg(priv, 0x3D, 0x04);
 230         } else if (prod == LGS8GXX_PROD_LGS8913 ||
 231                 prod == LGS8GXX_PROD_LGS8GL5 ||
 232                 prod == LGS8GXX_PROD_LGS8G42 ||
 233                 prod == LGS8GXX_PROD_LGS8G52 ||
 234                 prod == LGS8GXX_PROD_LGS8G54) {
 235                 lgs8gxx_read_reg(priv, 0x7E, &t);
 236                 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
 237
 238                 /* clear FEC self reset */
 239                 lgs8gxx_read_reg(priv, 0xC5, &t);
 240                 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
 241         }
 242
 243         if (prod == LGS8GXX_PROD_LGS8913) {
 244                 /* FEC auto detect */
 245                 lgs8gxx_write_reg(priv, 0xC1, 0x03);
 246
 247                 lgs8gxx_read_reg(priv, 0x7C, &t);
 248                 t = (t & 0x8C) | 0x03;
 249                 lgs8gxx_write_reg(priv, 0x7C, t);
 250
 251                 /* BER test mode */
 252                 lgs8gxx_read_reg(priv, 0xC3, &t);
 253                 t = (t & 0xEF) |  0x10;
 254                 lgs8gxx_write_reg(priv, 0xC3, t);
 255         }
 256
 257         if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
 258                 lgs8gxx_write_reg(priv, 0xD9, 0x40);
 259
 260         return 0;
 261 }
 262
 263 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
 264 {
 265         int ret = 0;
 266         u8 t;
 267
 268         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 269                 u8 t2;
 270                 lgs8gxx_read_reg(priv, 0x0C, &t);
 271                 t &= (~0x80);
 272                 lgs8gxx_write_reg(priv, 0x0C, t);
 273
 274                 lgs8gxx_read_reg(priv, 0x0C, &t);
 275                 lgs8gxx_read_reg(priv, 0x19, &t2);
 276
 277                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 278                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 279                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 280                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 281                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 282                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 283                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 284                 } else {
 285                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 286                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 287                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 288                 }
 289
 290                 lgs8gxx_soft_reset(priv);
 291                 return 0;
 292         }
 293
 294         /* turn off auto-detect; manual settings */
 295         lgs8gxx_write_reg(priv, 0x7E, 0);
 296         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 297                 lgs8gxx_write_reg(priv, 0xC1, 0);
 298
 299         ret = lgs8gxx_read_reg(priv, 0xC5, &t);
 300         t = (t & 0xE0) | 0x06;
 301         lgs8gxx_write_reg(priv, 0xC5, t);
 302
 303         lgs8gxx_soft_reset(priv);
 304
 305         return 0;
 306 }
 307
 308 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 309 {
 310         int ret = 0;
 311         u8 t;
 312
 313         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 314                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 315         else
 316                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 317         if (ret != 0)
 318                 return ret;
 319
 320         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 321                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 322         else
 323                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 324         return 0;
 325 }
 326
 327 /* Wait for Code Acquisition Lock */
 328 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 329 {
 330         int ret = 0;
 331         u8 reg, mask, val;
 332
 333         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 334                 reg = 0x13;
 335                 mask = 0x80;
 336                 val = 0x80;
 337         } else {
 338                 reg = 0x4B;
 339                 mask = 0xC0;
 340                 val = 0xC0;
 341         }
 342
 343         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 344         *locked = (ret == 0) ? 1 : 0;
 345
 346         return 0;
 347 }
 348
 349 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 350                                           u8 *finished)
 351 {
 352         int ret = 0;
 353         u8 reg, mask, val;
 354
 355         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 356                 reg = 0x1f;
 357                 mask = 0xC0;
 358                 val = 0x80;
 359         } else {
 360                 reg = 0xA4;
 361                 mask = 0x03;
 362                 val = 0x01;
 363         }
 364
 365         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 366         *finished = (ret == 0) ? 1 : 0;
 367
 368         return 0;
 369 }
 370
 371 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 372         u8 *locked)
 373 {
 374         int err = 0;
 375         u8 ad_fini = 0;
 376         u8 t1, t2;
 377
 378         if (gi == GI_945)
 379                 dprintk("try GI 945\n");
 380         else if (gi == GI_595)
 381                 dprintk("try GI 595\n");
 382         else if (gi == GI_420)
 383                 dprintk("try GI 420\n");
 384         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 385                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 386                 lgs8gxx_read_reg(priv, 0x18, &t2);
 387                 t1 &= ~(GI_MASK);
 388                 t1 |= gi;
 389                 t2 &= 0xFE;
 390                 t2 |= cpn ? 0x01 : 0x00;
 391                 lgs8gxx_write_reg(priv, 0x0C, t1);
 392                 lgs8gxx_write_reg(priv, 0x18, t2);
 393         } else {
 394                 lgs8gxx_write_reg(priv, 0x04, gi);
 395         }
 396         lgs8gxx_soft_reset(priv);
 397         err = lgs8gxx_wait_ca_lock(priv, locked);
 398         if (err || !(*locked))
 399                 return err;
 400         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 401         if (err != 0)
 402                 return err;
 403         if (ad_fini) {
 404                 dprintk("auto detect finished\n");
 405         } else
 406                 *locked = 0;
 407
 408         return 0;
 409 }
 410
 411 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 412                                u8 *detected_param, u8 *gi)
 413 {
 414         int i, j;
 415         int err = 0;
 416         u8 locked = 0, tmp_gi;
 417
 418         dprintk("%s\n", __func__);
 419
 420         lgs8gxx_set_mode_auto(priv);
 421         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 422                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 423                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 424         } else {
 425                 /* Guard Interval */
 426                 lgs8gxx_write_reg(priv, 0x03, 00);
 427         }
 428
 429         for (i = 0; i < 2; i++) {
 430                 for (j = 0; j < 2; j++) {
 431                         tmp_gi = GI_945;
 432                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 433                         if (err)
 434                                 goto out;
 435                         if (locked)
 436                                 goto locked;
 437                 }
 438                 for (j = 0; j < 2; j++) {
 439                         tmp_gi = GI_420;
 440                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 441                         if (err)
 442                                 goto out;
 443                         if (locked)
 444                                 goto locked;
 445                 }
 446                 tmp_gi = GI_595;
 447                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 448                 if (err)
 449                         goto out;
 450                 if (locked)
 451                         goto locked;
 452         }
 453
 454 locked:
 455         if ((err == 0) && (locked == 1)) {
 456                 u8 t;
 457
 458                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 459                         lgs8gxx_read_reg(priv, 0xA2, &t);
 460                         *detected_param = t;
 461                 } else {
 462                         lgs8gxx_read_reg(priv, 0x1F, &t);
 463                         *detected_param = t & 0x3F;
 464                 }
 465
 466                 if (tmp_gi == GI_945)
 467                         dprintk("GI 945 locked\n");
 468                 else if (tmp_gi == GI_595)
 469                         dprintk("GI 595 locked\n");
 470                 else if (tmp_gi == GI_420)
 471                         dprintk("GI 420 locked\n");
 472                 *gi = tmp_gi;
 473         }
 474         if (!locked)
 475                 err = -1;
 476
 477 out:
 478         return err;
 479 }
 480
 481 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 482 {
 483         s8 err;
 484         u8 gi = 0x2;
 485         u8 detected_param = 0;
 486
 487         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 488
 489         if (err != 0) {
 490                 dprintk("lgs8gxx_auto_detect failed\n");
 491         } else
 492                 dprintk("detected param = 0x%02X\n", detected_param);
 493
 494         /* Apply detected parameters */
 495         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 496                 u8 inter_leave_len = detected_param & TIM_MASK ;
 497                 /* Fix 8913 time interleaver detection bug */
 498                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 499                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 500                 detected_param |= inter_leave_len;
 501         }
 502         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 503                 u8 t;
 504                 lgs8gxx_read_reg(priv, 0x19, &t);
 505                 t &= 0x81;
 506                 t |= detected_param << 1;
 507                 lgs8gxx_write_reg(priv, 0x19, t);
 508         } else {
 509                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 510                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 511                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 512         }
 513         /* lgs8gxx_soft_reset(priv); */
 514
 515         /* Enter manual mode */
 516         lgs8gxx_set_mode_manual(priv);
 517
 518         switch (gi) {
 519         case GI_945:
 520                 priv->curr_gi = 945; break;
 521         case GI_595:
 522                 priv->curr_gi = 595; break;
 523         case GI_420:
 524                 priv->curr_gi = 420; break;
 525         default:
 526                 priv->curr_gi = 945; break;
 527         }
 528 }
 529
 530 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 531         u8 serial, u8 clk_pol, u8 clk_gated)
 532 {
 533         int ret = 0;
 534         u8 t, reg_addr;
 535
 536         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 537         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 538         if (ret != 0)
 539                 return ret;
 540
 541         t &= 0xF8;
 542         t |= serial ? TS_SERIAL : TS_PARALLEL;
 543         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 544         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 545
 546         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 547         if (ret != 0)
 548                 return ret;
 549
 550         return 0;
 551 }
 552
 553 /* A/D input peak-to-peak voltage range */
 554 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 555         u8 sel)
 556 {
 557         u8 r26 = 0x73, r27 = 0x90;
 558
 559         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 560                 return 0;
 561
 562         r26 |= (sel & 0x01) << 7;
 563         r27 |= (sel & 0x02) >> 1;
 564         lgs8gxx_write_reg(priv, 0x26, r26);
 565         lgs8gxx_write_reg(priv, 0x27, r27);
 566
 567         return 0;
 568 }
 569
 570 /* LGS8913 demod frontend functions */
 571
 572 static int lgs8913_init(struct lgs8gxx_state *priv)
 573 {
 574         u8 t;
 575
 576         /* LGS8913 specific */
 577         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 578
 579         lgs8gxx_read_reg(priv, 0x7c, &t);
 580         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 581
 582         /* LGS8913 specific */
 583         lgs8gxx_read_reg(priv, 0xc3, &t);
 584         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 585
 586
 587         return 0;
 588 }
 589
 590 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 591 {
 592         const struct firmware *fw;
 593         int rc;
 594         int i;
 595
 596         rc = request_firmware(&fw, "lgs8g75.fw", &priv->i2c->dev);
 597         if (rc)
 598                 return rc;
 599
 600         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 601
 602         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 603         lgs8gxx_write_reg(priv, 0x39, 0x00);
 604
 605         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 606         lgs8gxx_write_reg(priv, 0x38, 0x00);
 607         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 608         lgs8gxx_write_reg(priv, 0x38, 0x00);
 609
 610         for (i = 0; i < fw->size; i++) {
 611                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 612                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 613                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 614                 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
 615         }
 616
 617         lgs8gxx_write_reg(priv, 0x38, 0x00);
 618
 619         release_firmware(fw);
 620         return 0;
 621 }
 622
 623 static int lgs8gxx_init(struct dvb_frontend *fe)
 624 {
 625         struct lgs8gxx_state *priv =
 626                 (struct lgs8gxx_state *)fe->demodulator_priv;
 627         const struct lgs8gxx_config *config = priv->config;
 628         u8 data = 0;
 629         s8 err;
 630         dprintk("%s\n", __func__);
 631
 632         lgs8gxx_read_reg(priv, 0, &data);
 633         dprintk("reg 0 = 0x%02X\n", data);
 634
 635         if (config->prod == LGS8GXX_PROD_LGS8G75)
 636                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 637
 638         /* Setup MPEG output format */
 639         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 640                                     config->ts_clk_pol,
 641                                     config->ts_clk_gated);
 642         if (err != 0)
 643                 return -EIO;
 644
 645         if (config->prod == LGS8GXX_PROD_LGS8913)
 646                 lgs8913_init(priv);
 647         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 648         lgs8gxx_set_ad_mode(priv);
 649
 650         return 0;
 651 }
 652
 653 static void lgs8gxx_release(struct dvb_frontend *fe)
 654 {
 655         struct lgs8gxx_state *state = fe->demodulator_priv;
 656         dprintk("%s\n", __func__);
 657
 658         kfree(state);
 659 }
 660
 661
 662 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
 663 {
 664         struct lgs8gxx_state *priv = fe->demodulator_priv;
 665
 666         if (len != 2)
 667                 return -EINVAL;
 668
 669         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 670 }
 671
 672 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
 673 {
 674
 675         struct lgs8gxx_state *priv = fe->demodulator_priv;
 676
 677         dprintk("%s\n", __func__);
 678
 679         /* set frequency */
 680         if (fe->ops.tuner_ops.set_params) {
 681                 fe->ops.tuner_ops.set_params(fe);
 682                 if (fe->ops.i2c_gate_ctrl)
 683                         fe->ops.i2c_gate_ctrl(fe, 0);
 684         }
 685
 686         /* start auto lock */
 687         lgs8gxx_auto_lock(priv);
 688
 689         msleep(10);
 690
 691         return 0;
 692 }
 693
 694 static int lgs8gxx_get_fe(struct dvb_frontend *fe)
 695 {
 696         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 697         dprintk("%s\n", __func__);
 698
 699         /* TODO: get real readings from device */
 700         /* inversion status */
 701         fe_params->inversion = INVERSION_OFF;
 702
 703         /* bandwidth */
 704         fe_params->bandwidth_hz = 8000000;
 705
 706         fe_params->code_rate_HP = FEC_AUTO;
 707         fe_params->code_rate_LP = FEC_AUTO;
 708
 709         fe_params->modulation = QAM_AUTO;
 710
 711         /* transmission mode */
 712         fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
 713
 714         /* guard interval */
 715         fe_params->guard_interval = GUARD_INTERVAL_AUTO;
 716
 717         /* hierarchy */
 718         fe_params->hierarchy = HIERARCHY_NONE;
 719
 720         return 0;
 721 }
 722
 723 static
 724 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 725                               struct dvb_frontend_tune_settings *fesettings)
 726 {
 727         /* FIXME: copy from tda1004x.c */
 728         fesettings->min_delay_ms = 800;
 729         fesettings->step_size = 0;
 730         fesettings->max_drift = 0;
 731         return 0;
 732 }
 733
 734 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
 735 {
 736         struct lgs8gxx_state *priv = fe->demodulator_priv;
 737         s8 ret;
 738         u8 t, locked = 0;
 739
 740         dprintk("%s\n", __func__);
 741         *fe_status = 0;
 742
 743         lgs8gxx_get_afc_phase(priv);
 744         lgs8gxx_is_locked(priv, &locked);
 745         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 746                 if (locked)
 747                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 748                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 749                 return 0;
 750         }
 751
 752         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 753         if (ret != 0)
 754                 return -EIO;
 755
 756         dprintk("Reg 0x4B: 0x%02X\n", t);
 757
 758         *fe_status = 0;
 759         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 760                 if ((t & 0x40) == 0x40)
 761                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 762                 if ((t & 0x80) == 0x80)
 763                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 764                                 FE_HAS_LOCK;
 765         } else {
 766                 if ((t & 0x80) == 0x80)
 767                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 768                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 769         }
 770
 771         /* success */
 772         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 773         return 0;
 774 }
 775
 776 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 777 {
 778         u16 v;
 779         u8 agc_lvl[2], cat;
 780
 781         dprintk("%s()\n", __func__);
 782         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 783         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 784
 785         v = agc_lvl[0];
 786         v <<= 8;
 787         v |= agc_lvl[1];
 788
 789         dprintk("agc_lvl: 0x%04X\n", v);
 790
 791         if (v < 0x100)
 792                 cat = 0;
 793         else if (v < 0x190)
 794                 cat = 5;
 795         else if (v < 0x2A8)
 796                 cat = 4;
 797         else if (v < 0x381)
 798                 cat = 3;
 799         else if (v < 0x400)
 800                 cat = 2;
 801         else if (v == 0x400)
 802                 cat = 1;
 803         else
 804                 cat = 0;
 805
 806         *signal = cat * 65535 / 5;
 807
 808         return 0;
 809 }
 810
 811 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 812 {
 813         u8 t; s8 ret;
 814         s16 max_strength = 0;
 815         u8 str;
 816         u16 i, gi = priv->curr_gi;
 817
 818         dprintk("%s\n", __func__);
 819
 820         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 821         if (ret != 0)
 822                 return -EIO;
 823
 824         if (fake_signal_str) {
 825                 if ((t & 0xC0) == 0xC0) {
 826                         dprintk("Fake signal strength\n");
 827                         *signal = 0x7FFF;
 828                 } else
 829                         *signal = 0;
 830                 return 0;
 831         }
 832
 833         dprintk("gi = %d\n", gi);
 834         for (i = 0; i < gi; i++) {
 835
 836                 if ((i & 0xFF) == 0)
 837                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 838                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 839
 840                 lgs8gxx_read_reg(priv, 0x94, &str);
 841                 if (max_strength < str)
 842                         max_strength = str;
 843         }
 844
 845         *signal = max_strength;
 846         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 847
 848         lgs8gxx_read_reg(priv, 0x95, &t);
 849         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 850
 851         return 0;
 852 }
 853
 854 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 855 {
 856         u8 t;
 857         s16 v = 0;
 858
 859         dprintk("%s\n", __func__);
 860
 861         lgs8gxx_read_reg(priv, 0xB1, &t);
 862         v |= t;
 863         v <<= 8;
 864         lgs8gxx_read_reg(priv, 0xB0, &t);
 865         v |= t;
 866
 867         *signal = v;
 868         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 869
 870         return 0;
 871 }
 872
 873 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 874 {
 875         struct lgs8gxx_state *priv = fe->demodulator_priv;
 876
 877         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 878                 return lgs8913_read_signal_strength(priv, signal);
 879         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 880                 return lgs8g75_read_signal_strength(priv, signal);
 881         else
 882                 return lgs8gxx_read_signal_agc(priv, signal);
 883 }
 884
 885 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 886 {
 887         struct lgs8gxx_state *priv = fe->demodulator_priv;
 888         u8 t;
 889         *snr = 0;
 890
 891         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 892                 lgs8gxx_read_reg(priv, 0x34, &t);
 893         else
 894                 lgs8gxx_read_reg(priv, 0x95, &t);
 895         dprintk("AVG Noise=0x%02X\n", t);
 896         *snr = 256 - t;
 897         *snr <<= 8;
 898         dprintk("snr=0x%x\n", *snr);
 899
 900         return 0;
 901 }
 902
 903 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 904 {
 905         *ucblocks = 0;
 906         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 907         return 0;
 908 }
 909
 910 static void packet_counter_start(struct lgs8gxx_state *priv)
 911 {
 912         u8 orig, t;
 913
 914         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 915                 lgs8gxx_read_reg(priv, 0x30, &orig);
 916                 orig &= 0xE7;
 917                 t = orig | 0x10;
 918                 lgs8gxx_write_reg(priv, 0x30, t);
 919                 t = orig | 0x18;
 920                 lgs8gxx_write_reg(priv, 0x30, t);
 921                 t = orig | 0x10;
 922                 lgs8gxx_write_reg(priv, 0x30, t);
 923         } else {
 924                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 925                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 926                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 927         }
 928 }
 929
 930 static void packet_counter_stop(struct lgs8gxx_state *priv)
 931 {
 932         u8 t;
 933
 934         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 935                 lgs8gxx_read_reg(priv, 0x30, &t);
 936                 t &= 0xE7;
 937                 lgs8gxx_write_reg(priv, 0x30, t);
 938         } else {
 939                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 940         }
 941 }
 942
 943 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 944 {
 945         struct lgs8gxx_state *priv = fe->demodulator_priv;
 946         u8 reg_err, reg_total, t;
 947         u32 total_cnt = 0, err_cnt = 0;
 948         int i;
 949
 950         dprintk("%s\n", __func__);
 951
 952         packet_counter_start(priv);
 953         msleep(200);
 954         packet_counter_stop(priv);
 955
 956         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 957                 reg_total = 0x28; reg_err = 0x2C;
 958         } else {
 959                 reg_total = 0xD0; reg_err = 0xD4;
 960         }
 961
 962         for (i = 0; i < 4; i++) {
 963                 total_cnt <<= 8;
 964                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 965                 total_cnt |= t;
 966         }
 967         for (i = 0; i < 4; i++) {
 968                 err_cnt <<= 8;
 969                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
 970                 err_cnt |= t;
 971         }
 972         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
 973
 974         if (total_cnt == 0)
 975                 *ber = 0;
 976         else
 977                 *ber = err_cnt * 100 / total_cnt;
 978
 979         dprintk("%s: ber=0x%x\n", __func__, *ber);
 980         return 0;
 981 }
 982
 983 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 984 {
 985         struct lgs8gxx_state *priv = fe->demodulator_priv;
 986
 987         if (priv->config->tuner_address == 0)
 988                 return 0;
 989         if (enable) {
 990                 u8 v = 0x80 | priv->config->tuner_address;
 991                 return lgs8gxx_write_reg(priv, 0x01, v);
 992         }
 993         return lgs8gxx_write_reg(priv, 0x01, 0);
 994 }
 995
 996 static struct dvb_frontend_ops lgs8gxx_ops = {
 997         .delsys = { SYS_DMBTH },
 998         .info = {
 999                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
1000                 .frequency_min = 474000000,
1001                 .frequency_max = 858000000,
1002                 .frequency_stepsize = 10000,
1003                 .caps =
1004                         FE_CAN_FEC_AUTO |
1005                         FE_CAN_QAM_AUTO |
1006                         FE_CAN_TRANSMISSION_MODE_AUTO |
1007                         FE_CAN_GUARD_INTERVAL_AUTO
1008         },
1009
1010         .release = lgs8gxx_release,
1011
1012         .init = lgs8gxx_init,
1013         .write = lgs8gxx_write,
1014         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1015
1016         .set_frontend = lgs8gxx_set_fe,
1017         .get_frontend = lgs8gxx_get_fe,
1018         .get_tune_settings = lgs8gxx_get_tune_settings,
1019
1020         .read_status = lgs8gxx_read_status,
1021         .read_ber = lgs8gxx_read_ber,
1022         .read_signal_strength = lgs8gxx_read_signal_strength,
1023         .read_snr = lgs8gxx_read_snr,
1024         .read_ucblocks = lgs8gxx_read_ucblocks,
1025 };
1026
1027 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1028         struct i2c_adapter *i2c)
1029 {
1030         struct lgs8gxx_state *priv = NULL;
1031         u8 data = 0;
1032
1033         dprintk("%s()\n", __func__);
1034
1035         if (config == NULL || i2c == NULL)
1036                 return NULL;
1037
1038         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1039         if (priv == NULL)
1040                 goto error_out;
1041
1042         priv->config = config;
1043         priv->i2c = i2c;
1044
1045         /* check if the demod is there */
1046         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1047                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1048                         __func__, priv->config->demod_address);
1049                 goto error_out;
1050         }
1051
1052         lgs8gxx_read_reg(priv, 1, &data);
1053
1054         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1055                sizeof(struct dvb_frontend_ops));
1056         priv->frontend.demodulator_priv = priv;
1057
1058         if (config->prod == LGS8GXX_PROD_LGS8G75)
1059                 lgs8g75_init_data(priv);
1060
1061         return &priv->frontend;
1062
1063 error_out:
1064         dprintk("%s() error_out\n", __func__);
1065         kfree(priv);
1066         return NULL;
1067
1068 }
1069 EXPORT_SYMBOL(lgs8gxx_attach);
1070
1071 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1072 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1073 MODULE_LICENSE("GPL");