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         u8 t;
 266
 267         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 268                 u8 t2;
 269                 lgs8gxx_read_reg(priv, 0x0C, &t);
 270                 t &= (~0x80);
 271                 lgs8gxx_write_reg(priv, 0x0C, t);
 272
 273                 lgs8gxx_read_reg(priv, 0x0C, &t);
 274                 lgs8gxx_read_reg(priv, 0x19, &t2);
 275
 276                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 277                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 278                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 279                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 280                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 281                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 282                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 283                 } else {
 284                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 285                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 286                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 287                 }
 288
 289                 lgs8gxx_soft_reset(priv);
 290                 return 0;
 291         }
 292
 293         /* turn off auto-detect; manual settings */
 294         lgs8gxx_write_reg(priv, 0x7E, 0);
 295         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 296                 lgs8gxx_write_reg(priv, 0xC1, 0);
 297
 298         lgs8gxx_read_reg(priv, 0xC5, &t);
 299         t = (t & 0xE0) | 0x06;
 300         lgs8gxx_write_reg(priv, 0xC5, t);
 301
 302         lgs8gxx_soft_reset(priv);
 303
 304         return 0;
 305 }
 306
 307 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 308 {
 309         int ret = 0;
 310         u8 t;
 311
 312         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 313                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 314         else
 315                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 316         if (ret != 0)
 317                 return ret;
 318
 319         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 320                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 321         else
 322                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 323         return 0;
 324 }
 325
 326 /* Wait for Code Acquisition Lock */
 327 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 328 {
 329         int ret = 0;
 330         u8 reg, mask, val;
 331
 332         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 333                 reg = 0x13;
 334                 mask = 0x80;
 335                 val = 0x80;
 336         } else {
 337                 reg = 0x4B;
 338                 mask = 0xC0;
 339                 val = 0xC0;
 340         }
 341
 342         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 343         *locked = (ret == 0) ? 1 : 0;
 344
 345         return 0;
 346 }
 347
 348 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 349                                           u8 *finished)
 350 {
 351         int ret = 0;
 352         u8 reg, mask, val;
 353
 354         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 355                 reg = 0x1f;
 356                 mask = 0xC0;
 357                 val = 0x80;
 358         } else {
 359                 reg = 0xA4;
 360                 mask = 0x03;
 361                 val = 0x01;
 362         }
 363
 364         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 365         *finished = (ret == 0) ? 1 : 0;
 366
 367         return 0;
 368 }
 369
 370 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 371         u8 *locked)
 372 {
 373         int err = 0;
 374         u8 ad_fini = 0;
 375         u8 t1, t2;
 376
 377         if (gi == GI_945)
 378                 dprintk("try GI 945\n");
 379         else if (gi == GI_595)
 380                 dprintk("try GI 595\n");
 381         else if (gi == GI_420)
 382                 dprintk("try GI 420\n");
 383         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 384                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 385                 lgs8gxx_read_reg(priv, 0x18, &t2);
 386                 t1 &= ~(GI_MASK);
 387                 t1 |= gi;
 388                 t2 &= 0xFE;
 389                 t2 |= cpn ? 0x01 : 0x00;
 390                 lgs8gxx_write_reg(priv, 0x0C, t1);
 391                 lgs8gxx_write_reg(priv, 0x18, t2);
 392         } else {
 393                 lgs8gxx_write_reg(priv, 0x04, gi);
 394         }
 395         lgs8gxx_soft_reset(priv);
 396         err = lgs8gxx_wait_ca_lock(priv, locked);
 397         if (err || !(*locked))
 398                 return err;
 399         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 400         if (err != 0)
 401                 return err;
 402         if (ad_fini) {
 403                 dprintk("auto detect finished\n");
 404         } else
 405                 *locked = 0;
 406
 407         return 0;
 408 }
 409
 410 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 411                                u8 *detected_param, u8 *gi)
 412 {
 413         int i, j;
 414         int err = 0;
 415         u8 locked = 0, tmp_gi;
 416
 417         dprintk("%s\n", __func__);
 418
 419         lgs8gxx_set_mode_auto(priv);
 420         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 421                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 422                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 423         } else {
 424                 /* Guard Interval */
 425                 lgs8gxx_write_reg(priv, 0x03, 00);
 426         }
 427
 428         for (i = 0; i < 2; i++) {
 429                 for (j = 0; j < 2; j++) {
 430                         tmp_gi = GI_945;
 431                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 432                         if (err)
 433                                 goto out;
 434                         if (locked)
 435                                 goto locked;
 436                 }
 437                 for (j = 0; j < 2; j++) {
 438                         tmp_gi = GI_420;
 439                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 440                         if (err)
 441                                 goto out;
 442                         if (locked)
 443                                 goto locked;
 444                 }
 445                 tmp_gi = GI_595;
 446                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 447                 if (err)
 448                         goto out;
 449                 if (locked)
 450                         goto locked;
 451         }
 452
 453 locked:
 454         if ((err == 0) && (locked == 1)) {
 455                 u8 t;
 456
 457                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 458                         lgs8gxx_read_reg(priv, 0xA2, &t);
 459                         *detected_param = t;
 460                 } else {
 461                         lgs8gxx_read_reg(priv, 0x1F, &t);
 462                         *detected_param = t & 0x3F;
 463                 }
 464
 465                 if (tmp_gi == GI_945)
 466                         dprintk("GI 945 locked\n");
 467                 else if (tmp_gi == GI_595)
 468                         dprintk("GI 595 locked\n");
 469                 else if (tmp_gi == GI_420)
 470                         dprintk("GI 420 locked\n");
 471                 *gi = tmp_gi;
 472         }
 473         if (!locked)
 474                 err = -1;
 475
 476 out:
 477         return err;
 478 }
 479
 480 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 481 {
 482         s8 err;
 483         u8 gi = 0x2;
 484         u8 detected_param = 0;
 485
 486         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 487
 488         if (err != 0) {
 489                 dprintk("lgs8gxx_auto_detect failed\n");
 490         } else
 491                 dprintk("detected param = 0x%02X\n", detected_param);
 492
 493         /* Apply detected parameters */
 494         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 495                 u8 inter_leave_len = detected_param & TIM_MASK ;
 496                 /* Fix 8913 time interleaver detection bug */
 497                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 498                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 499                 detected_param |= inter_leave_len;
 500         }
 501         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 502                 u8 t;
 503                 lgs8gxx_read_reg(priv, 0x19, &t);
 504                 t &= 0x81;
 505                 t |= detected_param << 1;
 506                 lgs8gxx_write_reg(priv, 0x19, t);
 507         } else {
 508                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 509                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 510                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 511         }
 512         /* lgs8gxx_soft_reset(priv); */
 513
 514         /* Enter manual mode */
 515         lgs8gxx_set_mode_manual(priv);
 516
 517         switch (gi) {
 518         case GI_945:
 519                 priv->curr_gi = 945; break;
 520         case GI_595:
 521                 priv->curr_gi = 595; break;
 522         case GI_420:
 523                 priv->curr_gi = 420; break;
 524         default:
 525                 priv->curr_gi = 945; break;
 526         }
 527 }
 528
 529 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 530         u8 serial, u8 clk_pol, u8 clk_gated)
 531 {
 532         int ret = 0;
 533         u8 t, reg_addr;
 534
 535         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 536         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 537         if (ret != 0)
 538                 return ret;
 539
 540         t &= 0xF8;
 541         t |= serial ? TS_SERIAL : TS_PARALLEL;
 542         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 543         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 544
 545         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 546         if (ret != 0)
 547                 return ret;
 548
 549         return 0;
 550 }
 551
 552 /* A/D input peak-to-peak voltage range */
 553 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 554         u8 sel)
 555 {
 556         u8 r26 = 0x73, r27 = 0x90;
 557
 558         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 559                 return 0;
 560
 561         r26 |= (sel & 0x01) << 7;
 562         r27 |= (sel & 0x02) >> 1;
 563         lgs8gxx_write_reg(priv, 0x26, r26);
 564         lgs8gxx_write_reg(priv, 0x27, r27);
 565
 566         return 0;
 567 }
 568
 569 /* LGS8913 demod frontend functions */
 570
 571 static int lgs8913_init(struct lgs8gxx_state *priv)
 572 {
 573         u8 t;
 574
 575         /* LGS8913 specific */
 576         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 577
 578         lgs8gxx_read_reg(priv, 0x7c, &t);
 579         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 580
 581         /* LGS8913 specific */
 582         lgs8gxx_read_reg(priv, 0xc3, &t);
 583         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 584
 585
 586         return 0;
 587 }
 588
 589 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 590 {
 591         const struct firmware *fw;
 592         int rc;
 593         int i;
 594
 595         rc = request_firmware(&fw, "lgs8g75.fw", &priv->i2c->dev);
 596         if (rc)
 597                 return rc;
 598
 599         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 600
 601         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 602         lgs8gxx_write_reg(priv, 0x39, 0x00);
 603
 604         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 605         lgs8gxx_write_reg(priv, 0x38, 0x00);
 606         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 607         lgs8gxx_write_reg(priv, 0x38, 0x00);
 608
 609         for (i = 0; i < fw->size; i++) {
 610                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 611                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 612                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 613                 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
 614         }
 615
 616         lgs8gxx_write_reg(priv, 0x38, 0x00);
 617
 618         release_firmware(fw);
 619         return 0;
 620 }
 621
 622 static int lgs8gxx_init(struct dvb_frontend *fe)
 623 {
 624         struct lgs8gxx_state *priv =
 625                 (struct lgs8gxx_state *)fe->demodulator_priv;
 626         const struct lgs8gxx_config *config = priv->config;
 627         u8 data = 0;
 628         s8 err;
 629         dprintk("%s\n", __func__);
 630
 631         lgs8gxx_read_reg(priv, 0, &data);
 632         dprintk("reg 0 = 0x%02X\n", data);
 633
 634         if (config->prod == LGS8GXX_PROD_LGS8G75)
 635                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 636
 637         /* Setup MPEG output format */
 638         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 639                                     config->ts_clk_pol,
 640                                     config->ts_clk_gated);
 641         if (err != 0)
 642                 return -EIO;
 643
 644         if (config->prod == LGS8GXX_PROD_LGS8913)
 645                 lgs8913_init(priv);
 646         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 647         lgs8gxx_set_ad_mode(priv);
 648
 649         return 0;
 650 }
 651
 652 static void lgs8gxx_release(struct dvb_frontend *fe)
 653 {
 654         struct lgs8gxx_state *state = fe->demodulator_priv;
 655         dprintk("%s\n", __func__);
 656
 657         kfree(state);
 658 }
 659
 660
 661 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
 662 {
 663         struct lgs8gxx_state *priv = fe->demodulator_priv;
 664
 665         if (len != 2)
 666                 return -EINVAL;
 667
 668         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 669 }
 670
 671 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
 672 {
 673
 674         struct lgs8gxx_state *priv = fe->demodulator_priv;
 675
 676         dprintk("%s\n", __func__);
 677
 678         /* set frequency */
 679         if (fe->ops.tuner_ops.set_params) {
 680                 fe->ops.tuner_ops.set_params(fe);
 681                 if (fe->ops.i2c_gate_ctrl)
 682                         fe->ops.i2c_gate_ctrl(fe, 0);
 683         }
 684
 685         /* start auto lock */
 686         lgs8gxx_auto_lock(priv);
 687
 688         msleep(10);
 689
 690         return 0;
 691 }
 692
 693 static int lgs8gxx_get_fe(struct dvb_frontend *fe)
 694 {
 695         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 696         dprintk("%s\n", __func__);
 697
 698         /* TODO: get real readings from device */
 699         /* inversion status */
 700         fe_params->inversion = INVERSION_OFF;
 701
 702         /* bandwidth */
 703         fe_params->bandwidth_hz = 8000000;
 704
 705         fe_params->code_rate_HP = FEC_AUTO;
 706         fe_params->code_rate_LP = FEC_AUTO;
 707
 708         fe_params->modulation = QAM_AUTO;
 709
 710         /* transmission mode */
 711         fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
 712
 713         /* guard interval */
 714         fe_params->guard_interval = GUARD_INTERVAL_AUTO;
 715
 716         /* hierarchy */
 717         fe_params->hierarchy = HIERARCHY_NONE;
 718
 719         return 0;
 720 }
 721
 722 static
 723 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 724                               struct dvb_frontend_tune_settings *fesettings)
 725 {
 726         /* FIXME: copy from tda1004x.c */
 727         fesettings->min_delay_ms = 800;
 728         fesettings->step_size = 0;
 729         fesettings->max_drift = 0;
 730         return 0;
 731 }
 732
 733 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
 734 {
 735         struct lgs8gxx_state *priv = fe->demodulator_priv;
 736         s8 ret;
 737         u8 t, locked = 0;
 738
 739         dprintk("%s\n", __func__);
 740         *fe_status = 0;
 741
 742         lgs8gxx_get_afc_phase(priv);
 743         lgs8gxx_is_locked(priv, &locked);
 744         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 745                 if (locked)
 746                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 747                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 748                 return 0;
 749         }
 750
 751         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 752         if (ret != 0)
 753                 return -EIO;
 754
 755         dprintk("Reg 0x4B: 0x%02X\n", t);
 756
 757         *fe_status = 0;
 758         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 759                 if ((t & 0x40) == 0x40)
 760                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 761                 if ((t & 0x80) == 0x80)
 762                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 763                                 FE_HAS_LOCK;
 764         } else {
 765                 if ((t & 0x80) == 0x80)
 766                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 767                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 768         }
 769
 770         /* success */
 771         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 772         return 0;
 773 }
 774
 775 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 776 {
 777         u16 v;
 778         u8 agc_lvl[2], cat;
 779
 780         dprintk("%s()\n", __func__);
 781         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 782         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 783
 784         v = agc_lvl[0];
 785         v <<= 8;
 786         v |= agc_lvl[1];
 787
 788         dprintk("agc_lvl: 0x%04X\n", v);
 789
 790         if (v < 0x100)
 791                 cat = 0;
 792         else if (v < 0x190)
 793                 cat = 5;
 794         else if (v < 0x2A8)
 795                 cat = 4;
 796         else if (v < 0x381)
 797                 cat = 3;
 798         else if (v < 0x400)
 799                 cat = 2;
 800         else if (v == 0x400)
 801                 cat = 1;
 802         else
 803                 cat = 0;
 804
 805         *signal = cat * 65535 / 5;
 806
 807         return 0;
 808 }
 809
 810 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 811 {
 812         u8 t; s8 ret;
 813         s16 max_strength = 0;
 814         u8 str;
 815         u16 i, gi = priv->curr_gi;
 816
 817         dprintk("%s\n", __func__);
 818
 819         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 820         if (ret != 0)
 821                 return -EIO;
 822
 823         if (fake_signal_str) {
 824                 if ((t & 0xC0) == 0xC0) {
 825                         dprintk("Fake signal strength\n");
 826                         *signal = 0x7FFF;
 827                 } else
 828                         *signal = 0;
 829                 return 0;
 830         }
 831
 832         dprintk("gi = %d\n", gi);
 833         for (i = 0; i < gi; i++) {
 834
 835                 if ((i & 0xFF) == 0)
 836                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 837                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 838
 839                 lgs8gxx_read_reg(priv, 0x94, &str);
 840                 if (max_strength < str)
 841                         max_strength = str;
 842         }
 843
 844         *signal = max_strength;
 845         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 846
 847         lgs8gxx_read_reg(priv, 0x95, &t);
 848         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 849
 850         return 0;
 851 }
 852
 853 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 854 {
 855         u8 t;
 856         s16 v = 0;
 857
 858         dprintk("%s\n", __func__);
 859
 860         lgs8gxx_read_reg(priv, 0xB1, &t);
 861         v |= t;
 862         v <<= 8;
 863         lgs8gxx_read_reg(priv, 0xB0, &t);
 864         v |= t;
 865
 866         *signal = v;
 867         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 868
 869         return 0;
 870 }
 871
 872 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 873 {
 874         struct lgs8gxx_state *priv = fe->demodulator_priv;
 875
 876         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 877                 return lgs8913_read_signal_strength(priv, signal);
 878         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 879                 return lgs8g75_read_signal_strength(priv, signal);
 880         else
 881                 return lgs8gxx_read_signal_agc(priv, signal);
 882 }
 883
 884 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 885 {
 886         struct lgs8gxx_state *priv = fe->demodulator_priv;
 887         u8 t;
 888         *snr = 0;
 889
 890         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 891                 lgs8gxx_read_reg(priv, 0x34, &t);
 892         else
 893                 lgs8gxx_read_reg(priv, 0x95, &t);
 894         dprintk("AVG Noise=0x%02X\n", t);
 895         *snr = 256 - t;
 896         *snr <<= 8;
 897         dprintk("snr=0x%x\n", *snr);
 898
 899         return 0;
 900 }
 901
 902 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 903 {
 904         *ucblocks = 0;
 905         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 906         return 0;
 907 }
 908
 909 static void packet_counter_start(struct lgs8gxx_state *priv)
 910 {
 911         u8 orig, t;
 912
 913         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 914                 lgs8gxx_read_reg(priv, 0x30, &orig);
 915                 orig &= 0xE7;
 916                 t = orig | 0x10;
 917                 lgs8gxx_write_reg(priv, 0x30, t);
 918                 t = orig | 0x18;
 919                 lgs8gxx_write_reg(priv, 0x30, t);
 920                 t = orig | 0x10;
 921                 lgs8gxx_write_reg(priv, 0x30, t);
 922         } else {
 923                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 924                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 925                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 926         }
 927 }
 928
 929 static void packet_counter_stop(struct lgs8gxx_state *priv)
 930 {
 931         u8 t;
 932
 933         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 934                 lgs8gxx_read_reg(priv, 0x30, &t);
 935                 t &= 0xE7;
 936                 lgs8gxx_write_reg(priv, 0x30, t);
 937         } else {
 938                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 939         }
 940 }
 941
 942 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 943 {
 944         struct lgs8gxx_state *priv = fe->demodulator_priv;
 945         u8 reg_err, reg_total, t;
 946         u32 total_cnt = 0, err_cnt = 0;
 947         int i;
 948
 949         dprintk("%s\n", __func__);
 950
 951         packet_counter_start(priv);
 952         msleep(200);
 953         packet_counter_stop(priv);
 954
 955         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 956                 reg_total = 0x28; reg_err = 0x2C;
 957         } else {
 958                 reg_total = 0xD0; reg_err = 0xD4;
 959         }
 960
 961         for (i = 0; i < 4; i++) {
 962                 total_cnt <<= 8;
 963                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 964                 total_cnt |= t;
 965         }
 966         for (i = 0; i < 4; i++) {
 967                 err_cnt <<= 8;
 968                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
 969                 err_cnt |= t;
 970         }
 971         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
 972
 973         if (total_cnt == 0)
 974                 *ber = 0;
 975         else
 976                 *ber = err_cnt * 100 / total_cnt;
 977
 978         dprintk("%s: ber=0x%x\n", __func__, *ber);
 979         return 0;
 980 }
 981
 982 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 983 {
 984         struct lgs8gxx_state *priv = fe->demodulator_priv;
 985
 986         if (priv->config->tuner_address == 0)
 987                 return 0;
 988         if (enable) {
 989                 u8 v = 0x80 | priv->config->tuner_address;
 990                 return lgs8gxx_write_reg(priv, 0x01, v);
 991         }
 992         return lgs8gxx_write_reg(priv, 0x01, 0);
 993 }
 994
 995 static struct dvb_frontend_ops lgs8gxx_ops = {
 996         .delsys = { SYS_DMBTH },
 997         .info = {
 998                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
 999                 .frequency_min = 474000000,
1000                 .frequency_max = 858000000,
1001                 .frequency_stepsize = 10000,
1002                 .caps =
1003                         FE_CAN_FEC_AUTO |
1004                         FE_CAN_QAM_AUTO |
1005                         FE_CAN_TRANSMISSION_MODE_AUTO |
1006                         FE_CAN_GUARD_INTERVAL_AUTO
1007         },
1008
1009         .release = lgs8gxx_release,
1010
1011         .init = lgs8gxx_init,
1012         .write = lgs8gxx_write,
1013         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1014
1015         .set_frontend = lgs8gxx_set_fe,
1016         .get_frontend = lgs8gxx_get_fe,
1017         .get_tune_settings = lgs8gxx_get_tune_settings,
1018
1019         .read_status = lgs8gxx_read_status,
1020         .read_ber = lgs8gxx_read_ber,
1021         .read_signal_strength = lgs8gxx_read_signal_strength,
1022         .read_snr = lgs8gxx_read_snr,
1023         .read_ucblocks = lgs8gxx_read_ucblocks,
1024 };
1025
1026 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1027         struct i2c_adapter *i2c)
1028 {
1029         struct lgs8gxx_state *priv = NULL;
1030         u8 data = 0;
1031
1032         dprintk("%s()\n", __func__);
1033
1034         if (config == NULL || i2c == NULL)
1035                 return NULL;
1036
1037         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1038         if (priv == NULL)
1039                 goto error_out;
1040
1041         priv->config = config;
1042         priv->i2c = i2c;
1043
1044         /* check if the demod is there */
1045         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1046                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1047                         __func__, priv->config->demod_address);
1048                 goto error_out;
1049         }
1050
1051         lgs8gxx_read_reg(priv, 1, &data);
1052
1053         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1054                sizeof(struct dvb_frontend_ops));
1055         priv->frontend.demodulator_priv = priv;
1056
1057         if (config->prod == LGS8GXX_PROD_LGS8G75)
1058                 lgs8g75_init_data(priv);
1059
1060         return &priv->frontend;
1061
1062 error_out:
1063         dprintk("%s() error_out\n", __func__);
1064         kfree(priv);
1065         return NULL;
1066
1067 }
1068 EXPORT_SYMBOL(lgs8gxx_attach);
1069
1070 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1071 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1072 MODULE_LICENSE("GPL");