kernel/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 #define LGS8GXX_FIRMWARE "lgs8g75.fw"
  44
  45 module_param(debug, int, 0644);
  46 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
  47
  48 module_param(fake_signal_str, int, 0644);
  49 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
  50 "Signal strength calculation is slow.(default:on).");
  51
  52 /* LGS8GXX internal helper functions */
  53
  54 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
  55 {
  56         int ret;
  57         u8 buf[] = { reg, data };
  58         struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
  59
  60         msg.addr = priv->config->demod_address;
  61         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  62                 msg.addr += 0x02;
  63
  64         if (debug >= 2)
  65                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
  66
  67         ret = i2c_transfer(priv->i2c, &msg, 1);
  68
  69         if (ret != 1)
  70                 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
  71                         __func__, reg, data, ret);
  72
  73         return (ret != 1) ? -1 : 0;
  74 }
  75
  76 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
  77 {
  78         int ret;
  79         u8 dev_addr;
  80
  81         u8 b0[] = { reg };
  82         u8 b1[] = { 0 };
  83         struct i2c_msg msg[] = {
  84                 { .flags = 0, .buf = b0, .len = 1 },
  85                 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
  86         };
  87
  88         dev_addr = priv->config->demod_address;
  89         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  90                 dev_addr += 0x02;
  91         msg[1].addr =  msg[0].addr = dev_addr;
  92
  93         ret = i2c_transfer(priv->i2c, msg, 2);
  94         if (ret != 2) {
  95                 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
  96                 return -1;
  97         }
  98
  99         *p_data = b1[0];
 100         if (debug >= 2)
 101                 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
 102         return 0;
 103 }
 104
 105 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
 106 {
 107         lgs8gxx_write_reg(priv, 0x02, 0x00);
 108         msleep(1);
 109         lgs8gxx_write_reg(priv, 0x02, 0x01);
 110         msleep(100);
 111
 112         return 0;
 113 }
 114
 115 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
 116         u8 val, u8 delay, u8 tries)
 117 {
 118         u8 t;
 119         int i;
 120
 121         for (i = 0; i < tries; i++) {
 122                 lgs8gxx_read_reg(priv, reg, &t);
 123
 124                 if ((t & mask) == val)
 125                         return 0;
 126                 msleep(delay);
 127         }
 128
 129         return 1;
 130 }
 131
 132 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
 133 {
 134         const struct lgs8gxx_config *config = priv->config;
 135         u8 if_conf;
 136
 137         if_conf = 0x10; /* AGC output on, RF_AGC output off; */
 138
 139         if_conf |=
 140                 ((config->ext_adc) ? 0x80 : 0x00) |
 141                 ((config->if_neg_center) ? 0x04 : 0x00) |
 142                 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
 143                 ((config->adc_signed) ? 0x02 : 0x00) |
 144                 ((config->if_neg_edge) ? 0x01 : 0x00);
 145
 146         if (config->ext_adc &&
 147                 (config->prod == LGS8GXX_PROD_LGS8G52)) {
 148                 lgs8gxx_write_reg(priv, 0xBA, 0x40);
 149         }
 150
 151         lgs8gxx_write_reg(priv, 0x07, if_conf);
 152
 153         return 0;
 154 }
 155
 156 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
 157 {
 158         u64 val;
 159         u32 v32;
 160         u32 if_clk;
 161
 162         if_clk = priv->config->if_clk_freq;
 163
 164         val = freq;
 165         if (freq != 0) {
 166                 val <<= 32;
 167                 if (if_clk != 0)
 168                         do_div(val, if_clk);
 169                 v32 = val & 0xFFFFFFFF;
 170                 dprintk("Set IF Freq to %dkHz\n", freq);
 171         } else {
 172                 v32 = 0;
 173                 dprintk("Set IF Freq to baseband\n");
 174         }
 175         dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
 176
 177         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 178                 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
 179                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
 180                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
 181                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
 182         } else {
 183                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
 184                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
 185                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
 186                 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
 193 {
 194         u64 val;
 195         u32 v32 = 0;
 196         u8 reg_addr, t;
 197         int i;
 198
 199         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 200                 reg_addr = 0x23;
 201         else
 202                 reg_addr = 0x48;
 203
 204         for (i = 0; i < 4; i++) {
 205                 lgs8gxx_read_reg(priv, reg_addr, &t);
 206                 v32 <<= 8;
 207                 v32 |= t;
 208                 reg_addr--;
 209         }
 210
 211         val = v32;
 212         val *= priv->config->if_clk_freq;
 213         val >>= 32;
 214         dprintk("AFC = %u kHz\n", (u32)val);
 215         return 0;
 216 }
 217
 218 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
 219 {
 220         u8 t;
 221         u8 prod = priv->config->prod;
 222
 223         if (prod == LGS8GXX_PROD_LGS8913)
 224                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 225
 226         if (prod == LGS8GXX_PROD_LGS8G75) {
 227                 lgs8gxx_read_reg(priv, 0x0C, &t);
 228                 t &= (~0x04);
 229                 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
 230                 lgs8gxx_write_reg(priv, 0x39, 0x00);
 231                 lgs8gxx_write_reg(priv, 0x3D, 0x04);
 232         } else if (prod == LGS8GXX_PROD_LGS8913 ||
 233                 prod == LGS8GXX_PROD_LGS8GL5 ||
 234                 prod == LGS8GXX_PROD_LGS8G42 ||
 235                 prod == LGS8GXX_PROD_LGS8G52 ||
 236                 prod == LGS8GXX_PROD_LGS8G54) {
 237                 lgs8gxx_read_reg(priv, 0x7E, &t);
 238                 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
 239
 240                 /* clear FEC self reset */
 241                 lgs8gxx_read_reg(priv, 0xC5, &t);
 242                 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
 243         }
 244
 245         if (prod == LGS8GXX_PROD_LGS8913) {
 246                 /* FEC auto detect */
 247                 lgs8gxx_write_reg(priv, 0xC1, 0x03);
 248
 249                 lgs8gxx_read_reg(priv, 0x7C, &t);
 250                 t = (t & 0x8C) | 0x03;
 251                 lgs8gxx_write_reg(priv, 0x7C, t);
 252
 253                 /* BER test mode */
 254                 lgs8gxx_read_reg(priv, 0xC3, &t);
 255                 t = (t & 0xEF) |  0x10;
 256                 lgs8gxx_write_reg(priv, 0xC3, t);
 257         }
 258
 259         if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
 260                 lgs8gxx_write_reg(priv, 0xD9, 0x40);
 261
 262         return 0;
 263 }
 264
 265 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
 266 {
 267         u8 t;
 268
 269         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 270                 u8 t2;
 271                 lgs8gxx_read_reg(priv, 0x0C, &t);
 272                 t &= (~0x80);
 273                 lgs8gxx_write_reg(priv, 0x0C, t);
 274
 275                 lgs8gxx_read_reg(priv, 0x0C, &t);
 276                 lgs8gxx_read_reg(priv, 0x19, &t2);
 277
 278                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 279                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 280                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 281                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 282                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 283                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 284                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 285                 } else {
 286                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 287                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 288                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 289                 }
 290
 291                 lgs8gxx_soft_reset(priv);
 292                 return 0;
 293         }
 294
 295         /* turn off auto-detect; manual settings */
 296         lgs8gxx_write_reg(priv, 0x7E, 0);
 297         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 298                 lgs8gxx_write_reg(priv, 0xC1, 0);
 299
 300         lgs8gxx_read_reg(priv, 0xC5, &t);
 301         t = (t & 0xE0) | 0x06;
 302         lgs8gxx_write_reg(priv, 0xC5, t);
 303
 304         lgs8gxx_soft_reset(priv);
 305
 306         return 0;
 307 }
 308
 309 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 310 {
 311         int ret = 0;
 312         u8 t;
 313
 314         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 315                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 316         else
 317                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 318         if (ret != 0)
 319                 return ret;
 320
 321         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 322                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 323         else
 324                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 325         return 0;
 326 }
 327
 328 /* Wait for Code Acquisition Lock */
 329 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 330 {
 331         int ret = 0;
 332         u8 reg, mask, val;
 333
 334         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 335                 reg = 0x13;
 336                 mask = 0x80;
 337                 val = 0x80;
 338         } else {
 339                 reg = 0x4B;
 340                 mask = 0xC0;
 341                 val = 0xC0;
 342         }
 343
 344         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 345         *locked = (ret == 0) ? 1 : 0;
 346
 347         return 0;
 348 }
 349
 350 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 351                                           u8 *finished)
 352 {
 353         int ret = 0;
 354         u8 reg, mask, val;
 355
 356         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 357                 reg = 0x1f;
 358                 mask = 0xC0;
 359                 val = 0x80;
 360         } else {
 361                 reg = 0xA4;
 362                 mask = 0x03;
 363                 val = 0x01;
 364         }
 365
 366         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 367         *finished = (ret == 0) ? 1 : 0;
 368
 369         return 0;
 370 }
 371
 372 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 373         u8 *locked)
 374 {
 375         int err = 0;
 376         u8 ad_fini = 0;
 377         u8 t1, t2;
 378
 379         if (gi == GI_945)
 380                 dprintk("try GI 945\n");
 381         else if (gi == GI_595)
 382                 dprintk("try GI 595\n");
 383         else if (gi == GI_420)
 384                 dprintk("try GI 420\n");
 385         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 386                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 387                 lgs8gxx_read_reg(priv, 0x18, &t2);
 388                 t1 &= ~(GI_MASK);
 389                 t1 |= gi;
 390                 t2 &= 0xFE;
 391                 t2 |= cpn ? 0x01 : 0x00;
 392                 lgs8gxx_write_reg(priv, 0x0C, t1);
 393                 lgs8gxx_write_reg(priv, 0x18, t2);
 394         } else {
 395                 lgs8gxx_write_reg(priv, 0x04, gi);
 396         }
 397         lgs8gxx_soft_reset(priv);
 398         err = lgs8gxx_wait_ca_lock(priv, locked);
 399         if (err || !(*locked))
 400                 return err;
 401         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 402         if (err != 0)
 403                 return err;
 404         if (ad_fini) {
 405                 dprintk("auto detect finished\n");
 406         } else
 407                 *locked = 0;
 408
 409         return 0;
 410 }
 411
 412 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 413                                u8 *detected_param, u8 *gi)
 414 {
 415         int i, j;
 416         int err = 0;
 417         u8 locked = 0, tmp_gi;
 418
 419         dprintk("%s\n", __func__);
 420
 421         lgs8gxx_set_mode_auto(priv);
 422         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 423                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 424                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 425         } else {
 426                 /* Guard Interval */
 427                 lgs8gxx_write_reg(priv, 0x03, 00);
 428         }
 429
 430         for (i = 0; i < 2; i++) {
 431                 for (j = 0; j < 2; j++) {
 432                         tmp_gi = GI_945;
 433                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 434                         if (err)
 435                                 goto out;
 436                         if (locked)
 437                                 goto locked;
 438                 }
 439                 for (j = 0; j < 2; j++) {
 440                         tmp_gi = GI_420;
 441                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 442                         if (err)
 443                                 goto out;
 444                         if (locked)
 445                                 goto locked;
 446                 }
 447                 tmp_gi = GI_595;
 448                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 449                 if (err)
 450                         goto out;
 451                 if (locked)
 452                         goto locked;
 453         }
 454
 455 locked:
 456         if ((err == 0) && (locked == 1)) {
 457                 u8 t;
 458
 459                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 460                         lgs8gxx_read_reg(priv, 0xA2, &t);
 461                         *detected_param = t;
 462                 } else {
 463                         lgs8gxx_read_reg(priv, 0x1F, &t);
 464                         *detected_param = t & 0x3F;
 465                 }
 466
 467                 if (tmp_gi == GI_945)
 468                         dprintk("GI 945 locked\n");
 469                 else if (tmp_gi == GI_595)
 470                         dprintk("GI 595 locked\n");
 471                 else if (tmp_gi == GI_420)
 472                         dprintk("GI 420 locked\n");
 473                 *gi = tmp_gi;
 474         }
 475         if (!locked)
 476                 err = -1;
 477
 478 out:
 479         return err;
 480 }
 481
 482 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 483 {
 484         s8 err;
 485         u8 gi = 0x2;
 486         u8 detected_param = 0;
 487
 488         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 489
 490         if (err != 0) {
 491                 dprintk("lgs8gxx_auto_detect failed\n");
 492         } else
 493                 dprintk("detected param = 0x%02X\n", detected_param);
 494
 495         /* Apply detected parameters */
 496         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 497                 u8 inter_leave_len = detected_param & TIM_MASK ;
 498                 /* Fix 8913 time interleaver detection bug */
 499                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 500                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 501                 detected_param |= inter_leave_len;
 502         }
 503         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 504                 u8 t;
 505                 lgs8gxx_read_reg(priv, 0x19, &t);
 506                 t &= 0x81;
 507                 t |= detected_param << 1;
 508                 lgs8gxx_write_reg(priv, 0x19, t);
 509         } else {
 510                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 511                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 512                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 513         }
 514         /* lgs8gxx_soft_reset(priv); */
 515
 516         /* Enter manual mode */
 517         lgs8gxx_set_mode_manual(priv);
 518
 519         switch (gi) {
 520         case GI_945:
 521                 priv->curr_gi = 945; break;
 522         case GI_595:
 523                 priv->curr_gi = 595; break;
 524         case GI_420:
 525                 priv->curr_gi = 420; break;
 526         default:
 527                 priv->curr_gi = 945; break;
 528         }
 529 }
 530
 531 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 532         u8 serial, u8 clk_pol, u8 clk_gated)
 533 {
 534         int ret = 0;
 535         u8 t, reg_addr;
 536
 537         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 538         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 539         if (ret != 0)
 540                 return ret;
 541
 542         t &= 0xF8;
 543         t |= serial ? TS_SERIAL : TS_PARALLEL;
 544         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 545         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 546
 547         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 548         if (ret != 0)
 549                 return ret;
 550
 551         return 0;
 552 }
 553
 554 /* A/D input peak-to-peak voltage range */
 555 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 556         u8 sel)
 557 {
 558         u8 r26 = 0x73, r27 = 0x90;
 559
 560         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 561                 return 0;
 562
 563         r26 |= (sel & 0x01) << 7;
 564         r27 |= (sel & 0x02) >> 1;
 565         lgs8gxx_write_reg(priv, 0x26, r26);
 566         lgs8gxx_write_reg(priv, 0x27, r27);
 567
 568         return 0;
 569 }
 570
 571 /* LGS8913 demod frontend functions */
 572
 573 static int lgs8913_init(struct lgs8gxx_state *priv)
 574 {
 575         u8 t;
 576
 577         /* LGS8913 specific */
 578         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 579
 580         lgs8gxx_read_reg(priv, 0x7c, &t);
 581         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 582
 583         /* LGS8913 specific */
 584         lgs8gxx_read_reg(priv, 0xc3, &t);
 585         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 586
 587
 588         return 0;
 589 }
 590
 591 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 592 {
 593         const struct firmware *fw;
 594         int rc;
 595         int i;
 596
 597         rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
 598         if (rc)
 599                 return rc;
 600
 601         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 602
 603         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 604         lgs8gxx_write_reg(priv, 0x39, 0x00);
 605
 606         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 607         lgs8gxx_write_reg(priv, 0x38, 0x00);
 608         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 609         lgs8gxx_write_reg(priv, 0x38, 0x00);
 610
 611         for (i = 0; i < fw->size; i++) {
 612                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 613                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 614                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 615                 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
 616         }
 617
 618         lgs8gxx_write_reg(priv, 0x38, 0x00);
 619
 620         release_firmware(fw);
 621         return 0;
 622 }
 623
 624 static int lgs8gxx_init(struct dvb_frontend *fe)
 625 {
 626         struct lgs8gxx_state *priv =
 627                 (struct lgs8gxx_state *)fe->demodulator_priv;
 628         const struct lgs8gxx_config *config = priv->config;
 629         u8 data = 0;
 630         s8 err;
 631         dprintk("%s\n", __func__);
 632
 633         lgs8gxx_read_reg(priv, 0, &data);
 634         dprintk("reg 0 = 0x%02X\n", data);
 635
 636         if (config->prod == LGS8GXX_PROD_LGS8G75)
 637                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 638
 639         /* Setup MPEG output format */
 640         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 641                                     config->ts_clk_pol,
 642                                     config->ts_clk_gated);
 643         if (err != 0)
 644                 return -EIO;
 645
 646         if (config->prod == LGS8GXX_PROD_LGS8913)
 647                 lgs8913_init(priv);
 648         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 649         lgs8gxx_set_ad_mode(priv);
 650
 651         return 0;
 652 }
 653
 654 static void lgs8gxx_release(struct dvb_frontend *fe)
 655 {
 656         struct lgs8gxx_state *state = fe->demodulator_priv;
 657         dprintk("%s\n", __func__);
 658
 659         kfree(state);
 660 }
 661
 662
 663 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
 664 {
 665         struct lgs8gxx_state *priv = fe->demodulator_priv;
 666
 667         if (len != 2)
 668                 return -EINVAL;
 669
 670         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 671 }
 672
 673 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
 674 {
 675
 676         struct lgs8gxx_state *priv = fe->demodulator_priv;
 677
 678         dprintk("%s\n", __func__);
 679
 680         /* set frequency */
 681         if (fe->ops.tuner_ops.set_params) {
 682                 fe->ops.tuner_ops.set_params(fe);
 683                 if (fe->ops.i2c_gate_ctrl)
 684                         fe->ops.i2c_gate_ctrl(fe, 0);
 685         }
 686
 687         /* start auto lock */
 688         lgs8gxx_auto_lock(priv);
 689
 690         msleep(10);
 691
 692         return 0;
 693 }
 694
 695 static int lgs8gxx_get_fe(struct dvb_frontend *fe)
 696 {
 697         struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
 698         dprintk("%s\n", __func__);
 699
 700         /* TODO: get real readings from device */
 701         /* inversion status */
 702         fe_params->inversion = INVERSION_OFF;
 703
 704         /* bandwidth */
 705         fe_params->bandwidth_hz = 8000000;
 706
 707         fe_params->code_rate_HP = FEC_AUTO;
 708         fe_params->code_rate_LP = FEC_AUTO;
 709
 710         fe_params->modulation = QAM_AUTO;
 711
 712         /* transmission mode */
 713         fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
 714
 715         /* guard interval */
 716         fe_params->guard_interval = GUARD_INTERVAL_AUTO;
 717
 718         /* hierarchy */
 719         fe_params->hierarchy = HIERARCHY_NONE;
 720
 721         return 0;
 722 }
 723
 724 static
 725 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 726                               struct dvb_frontend_tune_settings *fesettings)
 727 {
 728         /* FIXME: copy from tda1004x.c */
 729         fesettings->min_delay_ms = 800;
 730         fesettings->step_size = 0;
 731         fesettings->max_drift = 0;
 732         return 0;
 733 }
 734
 735 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
 736 {
 737         struct lgs8gxx_state *priv = fe->demodulator_priv;
 738         s8 ret;
 739         u8 t, locked = 0;
 740
 741         dprintk("%s\n", __func__);
 742         *fe_status = 0;
 743
 744         lgs8gxx_get_afc_phase(priv);
 745         lgs8gxx_is_locked(priv, &locked);
 746         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 747                 if (locked)
 748                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 749                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 750                 return 0;
 751         }
 752
 753         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 754         if (ret != 0)
 755                 return -EIO;
 756
 757         dprintk("Reg 0x4B: 0x%02X\n", t);
 758
 759         *fe_status = 0;
 760         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 761                 if ((t & 0x40) == 0x40)
 762                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 763                 if ((t & 0x80) == 0x80)
 764                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 765                                 FE_HAS_LOCK;
 766         } else {
 767                 if ((t & 0x80) == 0x80)
 768                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 769                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 770         }
 771
 772         /* success */
 773         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 774         return 0;
 775 }
 776
 777 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 778 {
 779         u16 v;
 780         u8 agc_lvl[2], cat;
 781
 782         dprintk("%s()\n", __func__);
 783         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 784         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 785
 786         v = agc_lvl[0];
 787         v <<= 8;
 788         v |= agc_lvl[1];
 789
 790         dprintk("agc_lvl: 0x%04X\n", v);
 791
 792         if (v < 0x100)
 793                 cat = 0;
 794         else if (v < 0x190)
 795                 cat = 5;
 796         else if (v < 0x2A8)
 797                 cat = 4;
 798         else if (v < 0x381)
 799                 cat = 3;
 800         else if (v < 0x400)
 801                 cat = 2;
 802         else if (v == 0x400)
 803                 cat = 1;
 804         else
 805                 cat = 0;
 806
 807         *signal = cat * 65535 / 5;
 808
 809         return 0;
 810 }
 811
 812 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 813 {
 814         u8 t; s8 ret;
 815         s16 max_strength = 0;
 816         u8 str;
 817         u16 i, gi = priv->curr_gi;
 818
 819         dprintk("%s\n", __func__);
 820
 821         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 822         if (ret != 0)
 823                 return -EIO;
 824
 825         if (fake_signal_str) {
 826                 if ((t & 0xC0) == 0xC0) {
 827                         dprintk("Fake signal strength\n");
 828                         *signal = 0x7FFF;
 829                 } else
 830                         *signal = 0;
 831                 return 0;
 832         }
 833
 834         dprintk("gi = %d\n", gi);
 835         for (i = 0; i < gi; i++) {
 836
 837                 if ((i & 0xFF) == 0)
 838                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 839                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 840
 841                 lgs8gxx_read_reg(priv, 0x94, &str);
 842                 if (max_strength < str)
 843                         max_strength = str;
 844         }
 845
 846         *signal = max_strength;
 847         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 848
 849         lgs8gxx_read_reg(priv, 0x95, &t);
 850         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 851
 852         return 0;
 853 }
 854
 855 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 856 {
 857         u8 t;
 858         s16 v = 0;
 859
 860         dprintk("%s\n", __func__);
 861
 862         lgs8gxx_read_reg(priv, 0xB1, &t);
 863         v |= t;
 864         v <<= 8;
 865         lgs8gxx_read_reg(priv, 0xB0, &t);
 866         v |= t;
 867
 868         *signal = v;
 869         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 870
 871         return 0;
 872 }
 873
 874 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 875 {
 876         struct lgs8gxx_state *priv = fe->demodulator_priv;
 877
 878         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 879                 return lgs8913_read_signal_strength(priv, signal);
 880         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 881                 return lgs8g75_read_signal_strength(priv, signal);
 882         else
 883                 return lgs8gxx_read_signal_agc(priv, signal);
 884 }
 885
 886 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 887 {
 888         struct lgs8gxx_state *priv = fe->demodulator_priv;
 889         u8 t;
 890         *snr = 0;
 891
 892         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 893                 lgs8gxx_read_reg(priv, 0x34, &t);
 894         else
 895                 lgs8gxx_read_reg(priv, 0x95, &t);
 896         dprintk("AVG Noise=0x%02X\n", t);
 897         *snr = 256 - t;
 898         *snr <<= 8;
 899         dprintk("snr=0x%x\n", *snr);
 900
 901         return 0;
 902 }
 903
 904 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 905 {
 906         *ucblocks = 0;
 907         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 908         return 0;
 909 }
 910
 911 static void packet_counter_start(struct lgs8gxx_state *priv)
 912 {
 913         u8 orig, t;
 914
 915         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 916                 lgs8gxx_read_reg(priv, 0x30, &orig);
 917                 orig &= 0xE7;
 918                 t = orig | 0x10;
 919                 lgs8gxx_write_reg(priv, 0x30, t);
 920                 t = orig | 0x18;
 921                 lgs8gxx_write_reg(priv, 0x30, t);
 922                 t = orig | 0x10;
 923                 lgs8gxx_write_reg(priv, 0x30, t);
 924         } else {
 925                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 926                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 927                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 928         }
 929 }
 930
 931 static void packet_counter_stop(struct lgs8gxx_state *priv)
 932 {
 933         u8 t;
 934
 935         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 936                 lgs8gxx_read_reg(priv, 0x30, &t);
 937                 t &= 0xE7;
 938                 lgs8gxx_write_reg(priv, 0x30, t);
 939         } else {
 940                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 941         }
 942 }
 943
 944 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 945 {
 946         struct lgs8gxx_state *priv = fe->demodulator_priv;
 947         u8 reg_err, reg_total, t;
 948         u32 total_cnt = 0, err_cnt = 0;
 949         int i;
 950
 951         dprintk("%s\n", __func__);
 952
 953         packet_counter_start(priv);
 954         msleep(200);
 955         packet_counter_stop(priv);
 956
 957         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 958                 reg_total = 0x28; reg_err = 0x2C;
 959         } else {
 960                 reg_total = 0xD0; reg_err = 0xD4;
 961         }
 962
 963         for (i = 0; i < 4; i++) {
 964                 total_cnt <<= 8;
 965                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 966                 total_cnt |= t;
 967         }
 968         for (i = 0; i < 4; i++) {
 969                 err_cnt <<= 8;
 970                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
 971                 err_cnt |= t;
 972         }
 973         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
 974
 975         if (total_cnt == 0)
 976                 *ber = 0;
 977         else
 978                 *ber = err_cnt * 100 / total_cnt;
 979
 980         dprintk("%s: ber=0x%x\n", __func__, *ber);
 981         return 0;
 982 }
 983
 984 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 985 {
 986         struct lgs8gxx_state *priv = fe->demodulator_priv;
 987
 988         if (priv->config->tuner_address == 0)
 989                 return 0;
 990         if (enable) {
 991                 u8 v = 0x80 | priv->config->tuner_address;
 992                 return lgs8gxx_write_reg(priv, 0x01, v);
 993         }
 994         return lgs8gxx_write_reg(priv, 0x01, 0);
 995 }
 996
 997 static struct dvb_frontend_ops lgs8gxx_ops = {
 998         .delsys = { SYS_DTMB },
 999         .info = {
1000                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
1001                 .frequency_min = 474000000,
1002                 .frequency_max = 858000000,
1003                 .frequency_stepsize = 10000,
1004                 .caps =
1005                         FE_CAN_FEC_AUTO |
1006                         FE_CAN_QAM_AUTO |
1007                         FE_CAN_TRANSMISSION_MODE_AUTO |
1008                         FE_CAN_GUARD_INTERVAL_AUTO
1009         },
1010
1011         .release = lgs8gxx_release,
1012
1013         .init = lgs8gxx_init,
1014         .write = lgs8gxx_write,
1015         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1016
1017         .set_frontend = lgs8gxx_set_fe,
1018         .get_frontend = lgs8gxx_get_fe,
1019         .get_tune_settings = lgs8gxx_get_tune_settings,
1020
1021         .read_status = lgs8gxx_read_status,
1022         .read_ber = lgs8gxx_read_ber,
1023         .read_signal_strength = lgs8gxx_read_signal_strength,
1024         .read_snr = lgs8gxx_read_snr,
1025         .read_ucblocks = lgs8gxx_read_ucblocks,
1026 };
1027
1028 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1029         struct i2c_adapter *i2c)
1030 {
1031         struct lgs8gxx_state *priv = NULL;
1032         u8 data = 0;
1033
1034         dprintk("%s()\n", __func__);
1035
1036         if (config == NULL || i2c == NULL)
1037                 return NULL;
1038
1039         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1040         if (priv == NULL)
1041                 goto error_out;
1042
1043         priv->config = config;
1044         priv->i2c = i2c;
1045
1046         /* check if the demod is there */
1047         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1048                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1049                         __func__, priv->config->demod_address);
1050                 goto error_out;
1051         }
1052
1053         lgs8gxx_read_reg(priv, 1, &data);
1054
1055         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1056                sizeof(struct dvb_frontend_ops));
1057         priv->frontend.demodulator_priv = priv;
1058
1059         if (config->prod == LGS8GXX_PROD_LGS8G75)
1060                 lgs8g75_init_data(priv);
1061
1062         return &priv->frontend;
1063
1064 error_out:
1065         dprintk("%s() error_out\n", __func__);
1066         kfree(priv);
1067         return NULL;
1068
1069 }
1070 EXPORT_SYMBOL(lgs8gxx_attach);
1071
1072 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1073 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1074 MODULE_LICENSE("GPL");
1075 MODULE_FIRMWARE(LGS8GXX_FIRMWARE);