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                 printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
  64                         __func__, reg, data);
  65
  66         ret = i2c_transfer(priv->i2c, &msg, 1);
  67
  68         if (ret != 1)
  69                 dprintk(KERN_DEBUG "%s: error reg=0x%x, data=0x%x, ret=%i\n",
  70                         __func__, reg, data, ret);
  71
  72         return (ret != 1) ? -1 : 0;
  73 }
  74
  75 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
  76 {
  77         int ret;
  78         u8 dev_addr;
  79
  80         u8 b0[] = { reg };
  81         u8 b1[] = { 0 };
  82         struct i2c_msg msg[] = {
  83                 { .flags = 0, .buf = b0, .len = 1 },
  84                 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
  85         };
  86
  87         dev_addr = priv->config->demod_address;
  88         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  89                 dev_addr += 0x02;
  90         msg[1].addr =  msg[0].addr = dev_addr;
  91
  92         ret = i2c_transfer(priv->i2c, msg, 2);
  93         if (ret != 2) {
  94                 dprintk(KERN_DEBUG "%s: error reg=0x%x, ret=%i\n",
  95                         __func__, reg, ret);
  96                 return -1;
  97         }
  98
  99         *p_data = b1[0];
 100         if (debug >= 2)
 101                 printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
 102                         __func__, reg, b1[0]);
 103         return 0;
 104 }
 105
 106 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
 107 {
 108         lgs8gxx_write_reg(priv, 0x02, 0x00);
 109         msleep(1);
 110         lgs8gxx_write_reg(priv, 0x02, 0x01);
 111         msleep(100);
 112
 113         return 0;
 114 }
 115
 116 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
 117         u8 val, u8 delay, u8 tries)
 118 {
 119         u8 t;
 120         int i;
 121
 122         for (i = 0; i < tries; i++) {
 123                 lgs8gxx_read_reg(priv, reg, &t);
 124
 125                 if ((t & mask) == val)
 126                         return 0;
 127                 msleep(delay);
 128         }
 129
 130         return 1;
 131 }
 132
 133 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
 134 {
 135         const struct lgs8gxx_config *config = priv->config;
 136         u8 if_conf;
 137
 138         if_conf = 0x10; /* AGC output on, RF_AGC output off; */
 139
 140         if_conf |=
 141                 ((config->ext_adc) ? 0x80 : 0x00) |
 142                 ((config->if_neg_center) ? 0x04 : 0x00) |
 143                 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
 144                 ((config->adc_signed) ? 0x02 : 0x00) |
 145                 ((config->if_neg_edge) ? 0x01 : 0x00);
 146
 147         if (config->ext_adc &&
 148                 (config->prod == LGS8GXX_PROD_LGS8G52)) {
 149                 lgs8gxx_write_reg(priv, 0xBA, 0x40);
 150         }
 151
 152         lgs8gxx_write_reg(priv, 0x07, if_conf);
 153
 154         return 0;
 155 }
 156
 157 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
 158 {
 159         u64 val;
 160         u32 v32;
 161         u32 if_clk;
 162
 163         if_clk = priv->config->if_clk_freq;
 164
 165         val = freq;
 166         if (freq != 0) {
 167                 val <<= 32;
 168                 if (if_clk != 0)
 169                         do_div(val, if_clk);
 170                 v32 = val & 0xFFFFFFFF;
 171                 dprintk("Set IF Freq to %dkHz\n", freq);
 172         } else {
 173                 v32 = 0;
 174                 dprintk("Set IF Freq to baseband\n");
 175         }
 176         dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
 177
 178         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 179                 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
 180                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
 181                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
 182                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
 183         } else {
 184                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
 185                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
 186                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
 187                 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
 188         }
 189
 190         return 0;
 191 }
 192
 193 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
 194 {
 195         u64 val;
 196         u32 v32 = 0;
 197         u8 reg_addr, t;
 198         int i;
 199
 200         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 201                 reg_addr = 0x23;
 202         else
 203                 reg_addr = 0x48;
 204
 205         for (i = 0; i < 4; i++) {
 206                 lgs8gxx_read_reg(priv, reg_addr, &t);
 207                 v32 <<= 8;
 208                 v32 |= t;
 209                 reg_addr--;
 210         }
 211
 212         val = v32;
 213         val *= priv->config->if_clk_freq;
 214         val >>= 32;
 215         dprintk("AFC = %u kHz\n", (u32)val);
 216         return 0;
 217 }
 218
 219 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
 220 {
 221         u8 t;
 222         u8 prod = priv->config->prod;
 223
 224         if (prod == LGS8GXX_PROD_LGS8913)
 225                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 226
 227         if (prod == LGS8GXX_PROD_LGS8G75) {
 228                 lgs8gxx_read_reg(priv, 0x0C, &t);
 229                 t &= (~0x04);
 230                 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
 231                 lgs8gxx_write_reg(priv, 0x39, 0x00);
 232                 lgs8gxx_write_reg(priv, 0x3D, 0x04);
 233         } else if (prod == LGS8GXX_PROD_LGS8913 ||
 234                 prod == LGS8GXX_PROD_LGS8GL5 ||
 235                 prod == LGS8GXX_PROD_LGS8G42 ||
 236                 prod == LGS8GXX_PROD_LGS8G52 ||
 237                 prod == LGS8GXX_PROD_LGS8G54) {
 238                 lgs8gxx_read_reg(priv, 0x7E, &t);
 239                 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
 240
 241                 /* clear FEC self reset */
 242                 lgs8gxx_read_reg(priv, 0xC5, &t);
 243                 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
 244         }
 245
 246         if (prod == LGS8GXX_PROD_LGS8913) {
 247                 /* FEC auto detect */
 248                 lgs8gxx_write_reg(priv, 0xC1, 0x03);
 249
 250                 lgs8gxx_read_reg(priv, 0x7C, &t);
 251                 t = (t & 0x8C) | 0x03;
 252                 lgs8gxx_write_reg(priv, 0x7C, t);
 253
 254                 /* BER test mode */
 255                 lgs8gxx_read_reg(priv, 0xC3, &t);
 256                 t = (t & 0xEF) |  0x10;
 257                 lgs8gxx_write_reg(priv, 0xC3, t);
 258         }
 259
 260         if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
 261                 lgs8gxx_write_reg(priv, 0xD9, 0x40);
 262
 263         return 0;
 264 }
 265
 266 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
 267 {
 268         int ret = 0;
 269         u8 t;
 270
 271         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 272                 u8 t2;
 273                 lgs8gxx_read_reg(priv, 0x0C, &t);
 274                 t &= (~0x80);
 275                 lgs8gxx_write_reg(priv, 0x0C, t);
 276
 277                 lgs8gxx_read_reg(priv, 0x0C, &t);
 278                 lgs8gxx_read_reg(priv, 0x19, &t2);
 279
 280                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 281                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 282                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 283                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 284                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 285                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 286                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 287                 } else {
 288                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 289                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 290                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 291                 }
 292
 293                 lgs8gxx_soft_reset(priv);
 294                 return 0;
 295         }
 296
 297         /* turn off auto-detect; manual settings */
 298         lgs8gxx_write_reg(priv, 0x7E, 0);
 299         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 300                 lgs8gxx_write_reg(priv, 0xC1, 0);
 301
 302         ret = lgs8gxx_read_reg(priv, 0xC5, &t);
 303         t = (t & 0xE0) | 0x06;
 304         lgs8gxx_write_reg(priv, 0xC5, t);
 305
 306         lgs8gxx_soft_reset(priv);
 307
 308         return 0;
 309 }
 310
 311 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 312 {
 313         int ret = 0;
 314         u8 t;
 315
 316         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 317                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 318         else
 319                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 320         if (ret != 0)
 321                 return ret;
 322
 323         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 324                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 325         else
 326                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 327         return 0;
 328 }
 329
 330 /* Wait for Code Acquisition Lock */
 331 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 332 {
 333         int ret = 0;
 334         u8 reg, mask, val;
 335
 336         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 337                 reg = 0x13;
 338                 mask = 0x80;
 339                 val = 0x80;
 340         } else {
 341                 reg = 0x4B;
 342                 mask = 0xC0;
 343                 val = 0xC0;
 344         }
 345
 346         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 347         *locked = (ret == 0) ? 1 : 0;
 348
 349         return 0;
 350 }
 351
 352 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 353                                           u8 *finished)
 354 {
 355         int ret = 0;
 356         u8 reg, mask, val;
 357
 358         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 359                 reg = 0x1f;
 360                 mask = 0xC0;
 361                 val = 0x80;
 362         } else {
 363                 reg = 0xA4;
 364                 mask = 0x03;
 365                 val = 0x01;
 366         }
 367
 368         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 369         *finished = (ret == 0) ? 1 : 0;
 370
 371         return 0;
 372 }
 373
 374 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 375         u8 *locked)
 376 {
 377         int err = 0;
 378         u8 ad_fini = 0;
 379         u8 t1, t2;
 380
 381         if (gi == GI_945)
 382                 dprintk("try GI 945\n");
 383         else if (gi == GI_595)
 384                 dprintk("try GI 595\n");
 385         else if (gi == GI_420)
 386                 dprintk("try GI 420\n");
 387         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 388                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 389                 lgs8gxx_read_reg(priv, 0x18, &t2);
 390                 t1 &= ~(GI_MASK);
 391                 t1 |= gi;
 392                 t2 &= 0xFE;
 393                 t2 |= cpn ? 0x01 : 0x00;
 394                 lgs8gxx_write_reg(priv, 0x0C, t1);
 395                 lgs8gxx_write_reg(priv, 0x18, t2);
 396         } else {
 397                 lgs8gxx_write_reg(priv, 0x04, gi);
 398         }
 399         lgs8gxx_soft_reset(priv);
 400         err = lgs8gxx_wait_ca_lock(priv, locked);
 401         if (err || !(*locked))
 402                 return err;
 403         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 404         if (err != 0)
 405                 return err;
 406         if (ad_fini) {
 407                 dprintk("auto detect finished\n");
 408         } else
 409                 *locked = 0;
 410
 411         return 0;
 412 }
 413
 414 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 415                                u8 *detected_param, u8 *gi)
 416 {
 417         int i, j;
 418         int err = 0;
 419         u8 locked = 0, tmp_gi;
 420
 421         dprintk("%s\n", __func__);
 422
 423         lgs8gxx_set_mode_auto(priv);
 424         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 425                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 426                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 427         } else {
 428                 /* Guard Interval */
 429                 lgs8gxx_write_reg(priv, 0x03, 00);
 430         }
 431
 432         for (i = 0; i < 2; i++) {
 433                 for (j = 0; j < 2; j++) {
 434                         tmp_gi = GI_945;
 435                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 436                         if (err)
 437                                 goto out;
 438                         if (locked)
 439                                 goto locked;
 440                 }
 441                 for (j = 0; j < 2; j++) {
 442                         tmp_gi = GI_420;
 443                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 444                         if (err)
 445                                 goto out;
 446                         if (locked)
 447                                 goto locked;
 448                 }
 449                 tmp_gi = GI_595;
 450                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 451                 if (err)
 452                         goto out;
 453                 if (locked)
 454                         goto locked;
 455         }
 456
 457 locked:
 458         if ((err == 0) && (locked == 1)) {
 459                 u8 t;
 460
 461                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 462                         lgs8gxx_read_reg(priv, 0xA2, &t);
 463                         *detected_param = t;
 464                 } else {
 465                         lgs8gxx_read_reg(priv, 0x1F, &t);
 466                         *detected_param = t & 0x3F;
 467                 }
 468
 469                 if (tmp_gi == GI_945)
 470                         dprintk("GI 945 locked\n");
 471                 else if (tmp_gi == GI_595)
 472                         dprintk("GI 595 locked\n");
 473                 else if (tmp_gi == GI_420)
 474                         dprintk("GI 420 locked\n");
 475                 *gi = tmp_gi;
 476         }
 477         if (!locked)
 478                 err = -1;
 479
 480 out:
 481         return err;
 482 }
 483
 484 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 485 {
 486         s8 err;
 487         u8 gi = 0x2;
 488         u8 detected_param = 0;
 489
 490         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 491
 492         if (err != 0) {
 493                 dprintk("lgs8gxx_auto_detect failed\n");
 494         } else
 495                 dprintk("detected param = 0x%02X\n", detected_param);
 496
 497         /* Apply detected parameters */
 498         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 499                 u8 inter_leave_len = detected_param & TIM_MASK ;
 500                 /* Fix 8913 time interleaver detection bug */
 501                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 502                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 503                 detected_param |= inter_leave_len;
 504         }
 505         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 506                 u8 t;
 507                 lgs8gxx_read_reg(priv, 0x19, &t);
 508                 t &= 0x81;
 509                 t |= detected_param << 1;
 510                 lgs8gxx_write_reg(priv, 0x19, t);
 511         } else {
 512                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 513                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 514                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 515         }
 516         /* lgs8gxx_soft_reset(priv); */
 517
 518         /* Enter manual mode */
 519         lgs8gxx_set_mode_manual(priv);
 520
 521         switch (gi) {
 522         case GI_945:
 523                 priv->curr_gi = 945; break;
 524         case GI_595:
 525                 priv->curr_gi = 595; break;
 526         case GI_420:
 527                 priv->curr_gi = 420; break;
 528         default:
 529                 priv->curr_gi = 945; break;
 530         }
 531 }
 532
 533 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 534         u8 serial, u8 clk_pol, u8 clk_gated)
 535 {
 536         int ret = 0;
 537         u8 t, reg_addr;
 538
 539         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 540         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 541         if (ret != 0)
 542                 return ret;
 543
 544         t &= 0xF8;
 545         t |= serial ? TS_SERIAL : TS_PARALLEL;
 546         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 547         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 548
 549         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 550         if (ret != 0)
 551                 return ret;
 552
 553         return 0;
 554 }
 555
 556 /* A/D input peak-to-peak voltage range */
 557 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 558         u8 sel)
 559 {
 560         u8 r26 = 0x73, r27 = 0x90;
 561
 562         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 563                 return 0;
 564
 565         r26 |= (sel & 0x01) << 7;
 566         r27 |= (sel & 0x02) >> 1;
 567         lgs8gxx_write_reg(priv, 0x26, r26);
 568         lgs8gxx_write_reg(priv, 0x27, r27);
 569
 570         return 0;
 571 }
 572
 573 /* LGS8913 demod frontend functions */
 574
 575 static int lgs8913_init(struct lgs8gxx_state *priv)
 576 {
 577         u8 t;
 578
 579         /* LGS8913 specific */
 580         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 581
 582         lgs8gxx_read_reg(priv, 0x7c, &t);
 583         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 584
 585         /* LGS8913 specific */
 586         lgs8gxx_read_reg(priv, 0xc3, &t);
 587         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 588
 589
 590         return 0;
 591 }
 592
 593 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 594 {
 595         const struct firmware *fw;
 596         int rc;
 597         int i;
 598
 599         rc = request_firmware(&fw, "lgs8g75.fw", &priv->i2c->dev);
 600         if (rc)
 601                 return rc;
 602
 603         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 604
 605         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 606         lgs8gxx_write_reg(priv, 0x39, 0x00);
 607
 608         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 609         lgs8gxx_write_reg(priv, 0x38, 0x00);
 610         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 611         lgs8gxx_write_reg(priv, 0x38, 0x00);
 612
 613         for (i = 0; i < fw->size; i++) {
 614                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 615                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 616                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 617                 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
 618         }
 619
 620         lgs8gxx_write_reg(priv, 0x38, 0x00);
 621
 622         release_firmware(fw);
 623         return 0;
 624 }
 625
 626 static int lgs8gxx_init(struct dvb_frontend *fe)
 627 {
 628         struct lgs8gxx_state *priv =
 629                 (struct lgs8gxx_state *)fe->demodulator_priv;
 630         const struct lgs8gxx_config *config = priv->config;
 631         u8 data = 0;
 632         s8 err;
 633         dprintk("%s\n", __func__);
 634
 635         lgs8gxx_read_reg(priv, 0, &data);
 636         dprintk("reg 0 = 0x%02X\n", data);
 637
 638         if (config->prod == LGS8GXX_PROD_LGS8G75)
 639                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 640
 641         /* Setup MPEG output format */
 642         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 643                                     config->ts_clk_pol,
 644                                     config->ts_clk_gated);
 645         if (err != 0)
 646                 return -EIO;
 647
 648         if (config->prod == LGS8GXX_PROD_LGS8913)
 649                 lgs8913_init(priv);
 650         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 651         lgs8gxx_set_ad_mode(priv);
 652
 653         return 0;
 654 }
 655
 656 static void lgs8gxx_release(struct dvb_frontend *fe)
 657 {
 658         struct lgs8gxx_state *state = fe->demodulator_priv;
 659         dprintk("%s\n", __func__);
 660
 661         kfree(state);
 662 }
 663
 664
 665 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
 666 {
 667         struct lgs8gxx_state *priv = fe->demodulator_priv;
 668
 669         if (len != 2)
 670                 return -EINVAL;
 671
 672         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 673 }
 674
 675 static int lgs8gxx_set_fe(struct dvb_frontend *fe,
 676                           struct dvb_frontend_parameters *fe_params)
 677 {
 678         struct lgs8gxx_state *priv = fe->demodulator_priv;
 679
 680         dprintk("%s\n", __func__);
 681
 682         /* set frequency */
 683         if (fe->ops.tuner_ops.set_params) {
 684                 fe->ops.tuner_ops.set_params(fe, fe_params);
 685                 if (fe->ops.i2c_gate_ctrl)
 686                         fe->ops.i2c_gate_ctrl(fe, 0);
 687         }
 688
 689         /* start auto lock */
 690         lgs8gxx_auto_lock(priv);
 691
 692         msleep(10);
 693
 694         return 0;
 695 }
 696
 697 static int lgs8gxx_get_fe(struct dvb_frontend *fe,
 698                           struct dvb_frontend_parameters *fe_params)
 699 {
 700         dprintk("%s\n", __func__);
 701
 702         /* TODO: get real readings from device */
 703         /* inversion status */
 704         fe_params->inversion = INVERSION_OFF;
 705
 706         /* bandwidth */
 707         fe_params->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
 708
 709         fe_params->u.ofdm.code_rate_HP = FEC_AUTO;
 710         fe_params->u.ofdm.code_rate_LP = FEC_AUTO;
 711
 712         fe_params->u.ofdm.constellation = QAM_AUTO;
 713
 714         /* transmission mode */
 715         fe_params->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
 716
 717         /* guard interval */
 718         fe_params->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
 719
 720         /* hierarchy */
 721         fe_params->u.ofdm.hierarchy_information = HIERARCHY_NONE;
 722
 723         return 0;
 724 }
 725
 726 static
 727 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 728                               struct dvb_frontend_tune_settings *fesettings)
 729 {
 730         /* FIXME: copy from tda1004x.c */
 731         fesettings->min_delay_ms = 800;
 732         fesettings->step_size = 0;
 733         fesettings->max_drift = 0;
 734         return 0;
 735 }
 736
 737 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
 738 {
 739         struct lgs8gxx_state *priv = fe->demodulator_priv;
 740         s8 ret;
 741         u8 t, locked = 0;
 742
 743         dprintk("%s\n", __func__);
 744         *fe_status = 0;
 745
 746         lgs8gxx_get_afc_phase(priv);
 747         lgs8gxx_is_locked(priv, &locked);
 748         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 749                 if (locked)
 750                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 751                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 752                 return 0;
 753         }
 754
 755         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 756         if (ret != 0)
 757                 return -EIO;
 758
 759         dprintk("Reg 0x4B: 0x%02X\n", t);
 760
 761         *fe_status = 0;
 762         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 763                 if ((t & 0x40) == 0x40)
 764                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 765                 if ((t & 0x80) == 0x80)
 766                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 767                                 FE_HAS_LOCK;
 768         } else {
 769                 if ((t & 0x80) == 0x80)
 770                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 771                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 772         }
 773
 774         /* success */
 775         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 776         return 0;
 777 }
 778
 779 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 780 {
 781         u16 v;
 782         u8 agc_lvl[2], cat;
 783
 784         dprintk("%s()\n", __func__);
 785         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 786         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 787
 788         v = agc_lvl[0];
 789         v <<= 8;
 790         v |= agc_lvl[1];
 791
 792         dprintk("agc_lvl: 0x%04X\n", v);
 793
 794         if (v < 0x100)
 795                 cat = 0;
 796         else if (v < 0x190)
 797                 cat = 5;
 798         else if (v < 0x2A8)
 799                 cat = 4;
 800         else if (v < 0x381)
 801                 cat = 3;
 802         else if (v < 0x400)
 803                 cat = 2;
 804         else if (v == 0x400)
 805                 cat = 1;
 806         else
 807                 cat = 0;
 808
 809         *signal = cat * 65535 / 5;
 810
 811         return 0;
 812 }
 813
 814 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 815 {
 816         u8 t; s8 ret;
 817         s16 max_strength = 0;
 818         u8 str;
 819         u16 i, gi = priv->curr_gi;
 820
 821         dprintk("%s\n", __func__);
 822
 823         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 824         if (ret != 0)
 825                 return -EIO;
 826
 827         if (fake_signal_str) {
 828                 if ((t & 0xC0) == 0xC0) {
 829                         dprintk("Fake signal strength\n");
 830                         *signal = 0x7FFF;
 831                 } else
 832                         *signal = 0;
 833                 return 0;
 834         }
 835
 836         dprintk("gi = %d\n", gi);
 837         for (i = 0; i < gi; i++) {
 838
 839                 if ((i & 0xFF) == 0)
 840                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 841                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 842
 843                 lgs8gxx_read_reg(priv, 0x94, &str);
 844                 if (max_strength < str)
 845                         max_strength = str;
 846         }
 847
 848         *signal = max_strength;
 849         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 850
 851         lgs8gxx_read_reg(priv, 0x95, &t);
 852         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 853
 854         return 0;
 855 }
 856
 857 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 858 {
 859         u8 t;
 860         s16 v = 0;
 861
 862         dprintk("%s\n", __func__);
 863
 864         lgs8gxx_read_reg(priv, 0xB1, &t);
 865         v |= t;
 866         v <<= 8;
 867         lgs8gxx_read_reg(priv, 0xB0, &t);
 868         v |= t;
 869
 870         *signal = v;
 871         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 872
 873         return 0;
 874 }
 875
 876 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 877 {
 878         struct lgs8gxx_state *priv = fe->demodulator_priv;
 879
 880         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 881                 return lgs8913_read_signal_strength(priv, signal);
 882         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 883                 return lgs8g75_read_signal_strength(priv, signal);
 884         else
 885                 return lgs8gxx_read_signal_agc(priv, signal);
 886 }
 887
 888 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 889 {
 890         struct lgs8gxx_state *priv = fe->demodulator_priv;
 891         u8 t;
 892         *snr = 0;
 893
 894         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 895                 lgs8gxx_read_reg(priv, 0x34, &t);
 896         else
 897                 lgs8gxx_read_reg(priv, 0x95, &t);
 898         dprintk("AVG Noise=0x%02X\n", t);
 899         *snr = 256 - t;
 900         *snr <<= 8;
 901         dprintk("snr=0x%x\n", *snr);
 902
 903         return 0;
 904 }
 905
 906 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 907 {
 908         *ucblocks = 0;
 909         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 910         return 0;
 911 }
 912
 913 static void packet_counter_start(struct lgs8gxx_state *priv)
 914 {
 915         u8 orig, t;
 916
 917         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 918                 lgs8gxx_read_reg(priv, 0x30, &orig);
 919                 orig &= 0xE7;
 920                 t = orig | 0x10;
 921                 lgs8gxx_write_reg(priv, 0x30, t);
 922                 t = orig | 0x18;
 923                 lgs8gxx_write_reg(priv, 0x30, t);
 924                 t = orig | 0x10;
 925                 lgs8gxx_write_reg(priv, 0x30, t);
 926         } else {
 927                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 928                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 929                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 930         }
 931 }
 932
 933 static void packet_counter_stop(struct lgs8gxx_state *priv)
 934 {
 935         u8 t;
 936
 937         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 938                 lgs8gxx_read_reg(priv, 0x30, &t);
 939                 t &= 0xE7;
 940                 lgs8gxx_write_reg(priv, 0x30, t);
 941         } else {
 942                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 943         }
 944 }
 945
 946 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 947 {
 948         struct lgs8gxx_state *priv = fe->demodulator_priv;
 949         u8 reg_err, reg_total, t;
 950         u32 total_cnt = 0, err_cnt = 0;
 951         int i;
 952
 953         dprintk("%s\n", __func__);
 954
 955         packet_counter_start(priv);
 956         msleep(200);
 957         packet_counter_stop(priv);
 958
 959         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 960                 reg_total = 0x28; reg_err = 0x2C;
 961         } else {
 962                 reg_total = 0xD0; reg_err = 0xD4;
 963         }
 964
 965         for (i = 0; i < 4; i++) {
 966                 total_cnt <<= 8;
 967                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 968                 total_cnt |= t;
 969         }
 970         for (i = 0; i < 4; i++) {
 971                 err_cnt <<= 8;
 972                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
 973                 err_cnt |= t;
 974         }
 975         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
 976
 977         if (total_cnt == 0)
 978                 *ber = 0;
 979         else
 980                 *ber = err_cnt * 100 / total_cnt;
 981
 982         dprintk("%s: ber=0x%x\n", __func__, *ber);
 983         return 0;
 984 }
 985
 986 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 987 {
 988         struct lgs8gxx_state *priv = fe->demodulator_priv;
 989
 990         if (priv->config->tuner_address == 0)
 991                 return 0;
 992         if (enable) {
 993                 u8 v = 0x80 | priv->config->tuner_address;
 994                 return lgs8gxx_write_reg(priv, 0x01, v);
 995         }
 996         return lgs8gxx_write_reg(priv, 0x01, 0);
 997 }
 998
 999 static struct dvb_frontend_ops lgs8gxx_ops = {
1000         .info = {
1001                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
1002                 .type = FE_OFDM,
1003                 .frequency_min = 474000000,
1004                 .frequency_max = 858000000,
1005                 .frequency_stepsize = 10000,
1006                 .caps =
1007                         FE_CAN_FEC_AUTO |
1008                         FE_CAN_QAM_AUTO |
1009                         FE_CAN_TRANSMISSION_MODE_AUTO |
1010                         FE_CAN_GUARD_INTERVAL_AUTO
1011         },
1012
1013         .release = lgs8gxx_release,
1014
1015         .init = lgs8gxx_init,
1016         .write = lgs8gxx_write,
1017         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1018
1019         .set_frontend = lgs8gxx_set_fe,
1020         .get_frontend = lgs8gxx_get_fe,
1021         .get_tune_settings = lgs8gxx_get_tune_settings,
1022
1023         .read_status = lgs8gxx_read_status,
1024         .read_ber = lgs8gxx_read_ber,
1025         .read_signal_strength = lgs8gxx_read_signal_strength,
1026         .read_snr = lgs8gxx_read_snr,
1027         .read_ucblocks = lgs8gxx_read_ucblocks,
1028 };
1029
1030 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1031         struct i2c_adapter *i2c)
1032 {
1033         struct lgs8gxx_state *priv = NULL;
1034         u8 data = 0;
1035
1036         dprintk("%s()\n", __func__);
1037
1038         if (config == NULL || i2c == NULL)
1039                 return NULL;
1040
1041         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1042         if (priv == NULL)
1043                 goto error_out;
1044
1045         priv->config = config;
1046         priv->i2c = i2c;
1047
1048         /* check if the demod is there */
1049         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1050                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1051                         __func__, priv->config->demod_address);
1052                 goto error_out;
1053         }
1054
1055         lgs8gxx_read_reg(priv, 1, &data);
1056
1057         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1058                sizeof(struct dvb_frontend_ops));
1059         priv->frontend.demodulator_priv = priv;
1060
1061         if (config->prod == LGS8GXX_PROD_LGS8G75)
1062                 lgs8g75_init_data(priv);
1063
1064         return &priv->frontend;
1065
1066 error_out:
1067         dprintk("%s() error_out\n", __func__);
1068         kfree(priv);
1069         return NULL;
1070
1071 }
1072 EXPORT_SYMBOL(lgs8gxx_attach);
1073
1074 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1075 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1076 MODULE_LICENSE("GPL");