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
  28 #include "dvb_frontend.h"
  29
  30 #include "lgs8gxx.h"
  31 #include "lgs8gxx_priv.h"
  32
  33 #define dprintk(args...) \
  34         do { \
  35                 if (debug) \
  36                         printk(KERN_DEBUG "lgs8gxx: " args); \
  37         } while (0)
  38
  39 static int debug;
  40 static int fake_signal_str = 1;
  41
  42 module_param(debug, int, 0644);
  43 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
  44
  45 module_param(fake_signal_str, int, 0644);
  46 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
  47 "Signal strength calculation is slow.(default:on).");
  48
  49 static const u8 lgs8g75_initdat[] = {
  50         0x01, 0x30, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  51         0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  52         0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  53         0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  54         0x00, 0x01, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  55         0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  56         0xE4, 0xF5, 0xA8, 0xF5, 0xB8, 0xF5, 0x88, 0xF5,
  57         0x89, 0xF5, 0x87, 0x75, 0xD0, 0x00, 0x11, 0x50,
  58         0x11, 0x50, 0xF4, 0xF5, 0x80, 0xF5, 0x90, 0xF5,
  59         0xA0, 0xF5, 0xB0, 0x75, 0x81, 0x30, 0x80, 0x01,
  60         0x32, 0x90, 0x80, 0x12, 0x74, 0xFF, 0xF0, 0x90,
  61         0x80, 0x13, 0x74, 0x1F, 0xF0, 0x90, 0x80, 0x23,
  62         0x74, 0x01, 0xF0, 0x90, 0x80, 0x22, 0xF0, 0x90,
  63         0x00, 0x48, 0x74, 0x00, 0xF0, 0x90, 0x80, 0x4D,
  64         0x74, 0x05, 0xF0, 0x90, 0x80, 0x09, 0xE0, 0x60,
  65         0x21, 0x12, 0x00, 0xDD, 0x14, 0x60, 0x1B, 0x12,
  66         0x00, 0xDD, 0x14, 0x60, 0x15, 0x12, 0x00, 0xDD,
  67         0x14, 0x60, 0x0F, 0x12, 0x00, 0xDD, 0x14, 0x60,
  68         0x09, 0x12, 0x00, 0xDD, 0x14, 0x60, 0x03, 0x12,
  69         0x00, 0xDD, 0x90, 0x80, 0x42, 0xE0, 0x60, 0x0B,
  70         0x14, 0x60, 0x0C, 0x14, 0x60, 0x0D, 0x14, 0x60,
  71         0x0E, 0x01, 0xB3, 0x74, 0x04, 0x01, 0xB9, 0x74,
  72         0x05, 0x01, 0xB9, 0x74, 0x07, 0x01, 0xB9, 0x74,
  73         0x0A, 0xC0, 0xE0, 0x74, 0xC8, 0x12, 0x00, 0xE2,
  74         0xD0, 0xE0, 0x14, 0x70, 0xF4, 0x90, 0x80, 0x09,
  75         0xE0, 0x70, 0xAE, 0x12, 0x00, 0xF6, 0x12, 0x00,
  76         0xFE, 0x90, 0x00, 0x48, 0xE0, 0x04, 0xF0, 0x90,
  77         0x80, 0x4E, 0xF0, 0x01, 0x73, 0x90, 0x80, 0x08,
  78         0xF0, 0x22, 0xF8, 0x7A, 0x0C, 0x79, 0xFD, 0x00,
  79         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xD9,
  80         0xF6, 0xDA, 0xF2, 0xD8, 0xEE, 0x22, 0x90, 0x80,
  81         0x65, 0xE0, 0x54, 0xFD, 0xF0, 0x22, 0x90, 0x80,
  82         0x65, 0xE0, 0x44, 0xC2, 0xF0, 0x22
  83 };
  84
  85 /* LGS8GXX internal helper functions */
  86
  87 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
  88 {
  89         int ret;
  90         u8 buf[] = { reg, data };
  91         struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
  92
  93         msg.addr = priv->config->demod_address;
  94         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
  95                 msg.addr += 0x02;
  96
  97         if (debug >= 2)
  98                 printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
  99                         __func__, reg, data);
 100
 101         ret = i2c_transfer(priv->i2c, &msg, 1);
 102
 103         if (ret != 1)
 104                 dprintk(KERN_DEBUG "%s: error reg=0x%x, data=0x%x, ret=%i\n",
 105                         __func__, reg, data, ret);
 106
 107         return (ret != 1) ? -1 : 0;
 108 }
 109
 110 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
 111 {
 112         int ret;
 113         u8 dev_addr;
 114
 115         u8 b0[] = { reg };
 116         u8 b1[] = { 0 };
 117         struct i2c_msg msg[] = {
 118                 { .flags = 0, .buf = b0, .len = 1 },
 119                 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
 120         };
 121
 122         dev_addr = priv->config->demod_address;
 123         if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
 124                 dev_addr += 0x02;
 125         msg[1].addr =  msg[0].addr = dev_addr;
 126
 127         ret = i2c_transfer(priv->i2c, msg, 2);
 128         if (ret != 2) {
 129                 dprintk(KERN_DEBUG "%s: error reg=0x%x, ret=%i\n",
 130                         __func__, reg, ret);
 131                 return -1;
 132         }
 133
 134         *p_data = b1[0];
 135         if (debug >= 2)
 136                 printk(KERN_DEBUG "%s: reg=0x%02X, data=0x%02X\n",
 137                         __func__, reg, b1[0]);
 138         return 0;
 139 }
 140
 141 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
 142 {
 143         lgs8gxx_write_reg(priv, 0x02, 0x00);
 144         msleep(1);
 145         lgs8gxx_write_reg(priv, 0x02, 0x01);
 146         msleep(100);
 147
 148         return 0;
 149 }
 150
 151 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
 152         u8 val, u8 delay, u8 tries)
 153 {
 154         u8 t;
 155         int i;
 156
 157         for (i = 0; i < tries; i++) {
 158                 lgs8gxx_read_reg(priv, reg, &t);
 159
 160                 if ((t & mask) == val)
 161                         return 0;
 162                 msleep(delay);
 163         }
 164
 165         return 1;
 166 }
 167
 168 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
 169 {
 170         const struct lgs8gxx_config *config = priv->config;
 171         u8 if_conf;
 172
 173         if_conf = 0x10; /* AGC output on, RF_AGC output off; */
 174
 175         if_conf |=
 176                 ((config->ext_adc) ? 0x80 : 0x00) |
 177                 ((config->if_neg_center) ? 0x04 : 0x00) |
 178                 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
 179                 ((config->adc_signed) ? 0x02 : 0x00) |
 180                 ((config->if_neg_edge) ? 0x01 : 0x00);
 181
 182         if (config->ext_adc &&
 183                 (config->prod == LGS8GXX_PROD_LGS8G52)) {
 184                 lgs8gxx_write_reg(priv, 0xBA, 0x40);
 185         }
 186
 187         lgs8gxx_write_reg(priv, 0x07, if_conf);
 188
 189         return 0;
 190 }
 191
 192 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
 193 {
 194         u64 val;
 195         u32 v32;
 196         u32 if_clk;
 197
 198         if_clk = priv->config->if_clk_freq;
 199
 200         val = freq;
 201         if (freq != 0) {
 202                 val <<= 32;
 203                 if (if_clk != 0)
 204                         do_div(val, if_clk);
 205                 v32 = val & 0xFFFFFFFF;
 206                 dprintk("Set IF Freq to %dkHz\n", freq);
 207         } else {
 208                 v32 = 0;
 209                 dprintk("Set IF Freq to baseband\n");
 210         }
 211         dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
 212
 213         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 214                 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
 215                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
 216                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
 217                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
 218         } else {
 219                 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
 220                 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
 221                 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
 222                 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
 229 {
 230         u64 val;
 231         u32 v32 = 0;
 232         u8 reg_addr, t;
 233         int i;
 234
 235         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 236                 reg_addr = 0x23;
 237         else
 238                 reg_addr = 0x48;
 239
 240         for (i = 0; i < 4; i++) {
 241                 lgs8gxx_read_reg(priv, reg_addr, &t);
 242                 v32 <<= 8;
 243                 v32 |= t;
 244                 reg_addr--;
 245         }
 246
 247         val = v32;
 248         val *= priv->config->if_clk_freq;
 249         val >>= 32;
 250         dprintk("AFC = %u kHz\n", (u32)val);
 251         return 0;
 252 }
 253
 254 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
 255 {
 256         u8 t;
 257         u8 prod = priv->config->prod;
 258
 259         if (prod == LGS8GXX_PROD_LGS8913)
 260                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 261
 262         if (prod == LGS8GXX_PROD_LGS8G75) {
 263                 lgs8gxx_read_reg(priv, 0x0C, &t);
 264                 t &= (~0x04);
 265                 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
 266                 lgs8gxx_write_reg(priv, 0x39, 0x00);
 267                 lgs8gxx_write_reg(priv, 0x3D, 0x04);
 268         } else if (prod == LGS8GXX_PROD_LGS8913 ||
 269                 prod == LGS8GXX_PROD_LGS8GL5 ||
 270                 prod == LGS8GXX_PROD_LGS8G42 ||
 271                 prod == LGS8GXX_PROD_LGS8G52 ||
 272                 prod == LGS8GXX_PROD_LGS8G54) {
 273                 lgs8gxx_read_reg(priv, 0x7E, &t);
 274                 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
 275
 276                 /* clear FEC self reset */
 277                 lgs8gxx_read_reg(priv, 0xC5, &t);
 278                 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
 279         }
 280
 281         if (prod == LGS8GXX_PROD_LGS8913) {
 282                 /* FEC auto detect */
 283                 lgs8gxx_write_reg(priv, 0xC1, 0x03);
 284
 285                 lgs8gxx_read_reg(priv, 0x7C, &t);
 286                 t = (t & 0x8C) | 0x03;
 287                 lgs8gxx_write_reg(priv, 0x7C, t);
 288
 289                 /* BER test mode */
 290                 lgs8gxx_read_reg(priv, 0xC3, &t);
 291                 t = (t & 0xEF) |  0x10;
 292                 lgs8gxx_write_reg(priv, 0xC3, t);
 293         }
 294
 295         if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
 296                 lgs8gxx_write_reg(priv, 0xD9, 0x40);
 297
 298         return 0;
 299 }
 300
 301 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
 302 {
 303         int ret = 0;
 304         u8 t;
 305
 306         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 307                 u8 t2;
 308                 lgs8gxx_read_reg(priv, 0x0C, &t);
 309                 t &= (~0x80);
 310                 lgs8gxx_write_reg(priv, 0x0C, t);
 311
 312                 lgs8gxx_read_reg(priv, 0x0C, &t);
 313                 lgs8gxx_read_reg(priv, 0x19, &t2);
 314
 315                 if (((t&0x03) == 0x01) && (t2&0x01)) {
 316                         lgs8gxx_write_reg(priv, 0x6E, 0x05);
 317                         lgs8gxx_write_reg(priv, 0x39, 0x02);
 318                         lgs8gxx_write_reg(priv, 0x39, 0x03);
 319                         lgs8gxx_write_reg(priv, 0x3D, 0x05);
 320                         lgs8gxx_write_reg(priv, 0x3E, 0x28);
 321                         lgs8gxx_write_reg(priv, 0x53, 0x80);
 322                 } else {
 323                         lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 324                         lgs8gxx_write_reg(priv, 0x39, 0x00);
 325                         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 326                 }
 327
 328                 lgs8gxx_soft_reset(priv);
 329                 return 0;
 330         }
 331
 332         /* turn off auto-detect; manual settings */
 333         lgs8gxx_write_reg(priv, 0x7E, 0);
 334         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 335                 lgs8gxx_write_reg(priv, 0xC1, 0);
 336
 337         ret = lgs8gxx_read_reg(priv, 0xC5, &t);
 338         t = (t & 0xE0) | 0x06;
 339         lgs8gxx_write_reg(priv, 0xC5, t);
 340
 341         lgs8gxx_soft_reset(priv);
 342
 343         return 0;
 344 }
 345
 346 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
 347 {
 348         int ret = 0;
 349         u8 t;
 350
 351         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 352                 ret = lgs8gxx_read_reg(priv, 0x13, &t);
 353         else
 354                 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 355         if (ret != 0)
 356                 return ret;
 357
 358         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 359                 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
 360         else
 361                 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
 362         return 0;
 363 }
 364
 365 /* Wait for Code Acquisition Lock */
 366 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
 367 {
 368         int ret = 0;
 369         u8 reg, mask, val;
 370
 371         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 372                 reg = 0x13;
 373                 mask = 0x80;
 374                 val = 0x80;
 375         } else {
 376                 reg = 0x4B;
 377                 mask = 0xC0;
 378                 val = 0xC0;
 379         }
 380
 381         ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
 382         *locked = (ret == 0) ? 1 : 0;
 383
 384         return 0;
 385 }
 386
 387 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
 388                                           u8 *finished)
 389 {
 390         int ret = 0;
 391         u8 reg, mask, val;
 392
 393         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 394                 reg = 0x1f;
 395                 mask = 0xC0;
 396                 val = 0x80;
 397         } else {
 398                 reg = 0xA4;
 399                 mask = 0x03;
 400                 val = 0x01;
 401         }
 402
 403         ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
 404         *finished = (ret == 0) ? 1 : 0;
 405
 406         return 0;
 407 }
 408
 409 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
 410         u8 *locked)
 411 {
 412         int err = 0;
 413         u8 ad_fini = 0;
 414         u8 t1, t2;
 415
 416         if (gi == GI_945)
 417                 dprintk("try GI 945\n");
 418         else if (gi == GI_595)
 419                 dprintk("try GI 595\n");
 420         else if (gi == GI_420)
 421                 dprintk("try GI 420\n");
 422         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 423                 lgs8gxx_read_reg(priv, 0x0C, &t1);
 424                 lgs8gxx_read_reg(priv, 0x18, &t2);
 425                 t1 &= ~(GI_MASK);
 426                 t1 |= gi;
 427                 t2 &= 0xFE;
 428                 t2 |= cpn ? 0x01 : 0x00;
 429                 lgs8gxx_write_reg(priv, 0x0C, t1);
 430                 lgs8gxx_write_reg(priv, 0x18, t2);
 431         } else {
 432                 lgs8gxx_write_reg(priv, 0x04, gi);
 433         }
 434         lgs8gxx_soft_reset(priv);
 435         err = lgs8gxx_wait_ca_lock(priv, locked);
 436         if (err || !(*locked))
 437                 return err;
 438         err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
 439         if (err != 0)
 440                 return err;
 441         if (ad_fini) {
 442                 dprintk("auto detect finished\n");
 443         } else
 444                 *locked = 0;
 445
 446         return 0;
 447 }
 448
 449 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
 450                                u8 *detected_param, u8 *gi)
 451 {
 452         int i, j;
 453         int err = 0;
 454         u8 locked = 0, tmp_gi;
 455
 456         dprintk("%s\n", __func__);
 457
 458         lgs8gxx_set_mode_auto(priv);
 459         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 460                 lgs8gxx_write_reg(priv, 0x67, 0xAA);
 461                 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
 462         } else {
 463                 /* Guard Interval */
 464                 lgs8gxx_write_reg(priv, 0x03, 00);
 465         }
 466
 467         for (i = 0; i < 2; i++) {
 468                 for (j = 0; j < 2; j++) {
 469                         tmp_gi = GI_945;
 470                         err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
 471                         if (err)
 472                                 goto out;
 473                         if (locked)
 474                                 goto locked;
 475                 }
 476                 for (j = 0; j < 2; j++) {
 477                         tmp_gi = GI_420;
 478                         err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
 479                         if (err)
 480                                 goto out;
 481                         if (locked)
 482                                 goto locked;
 483                 }
 484                 tmp_gi = GI_595;
 485                 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
 486                 if (err)
 487                         goto out;
 488                 if (locked)
 489                         goto locked;
 490         }
 491
 492 locked:
 493         if ((err == 0) && (locked == 1)) {
 494                 u8 t;
 495
 496                 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
 497                         lgs8gxx_read_reg(priv, 0xA2, &t);
 498                         *detected_param = t;
 499                 } else {
 500                         lgs8gxx_read_reg(priv, 0x1F, &t);
 501                         *detected_param = t & 0x3F;
 502                 }
 503
 504                 if (tmp_gi == GI_945)
 505                         dprintk("GI 945 locked\n");
 506                 else if (tmp_gi == GI_595)
 507                         dprintk("GI 595 locked\n");
 508                 else if (tmp_gi == GI_420)
 509                         dprintk("GI 420 locked\n");
 510                 *gi = tmp_gi;
 511         }
 512         if (!locked)
 513                 err = -1;
 514
 515 out:
 516         return err;
 517 }
 518
 519 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
 520 {
 521         s8 err;
 522         u8 gi = 0x2;
 523         u8 detected_param = 0;
 524
 525         err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
 526
 527         if (err != 0) {
 528                 dprintk("lgs8gxx_auto_detect failed\n");
 529         } else
 530                 dprintk("detected param = 0x%02X\n", detected_param);
 531
 532         /* Apply detected parameters */
 533         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 534                 u8 inter_leave_len = detected_param & TIM_MASK ;
 535                 /* Fix 8913 time interleaver detection bug */
 536                 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
 537                 detected_param &= CF_MASK | SC_MASK  | LGS_FEC_MASK;
 538                 detected_param |= inter_leave_len;
 539         }
 540         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 541                 u8 t;
 542                 lgs8gxx_read_reg(priv, 0x19, &t);
 543                 t &= 0x81;
 544                 t |= detected_param << 1;
 545                 lgs8gxx_write_reg(priv, 0x19, t);
 546         } else {
 547                 lgs8gxx_write_reg(priv, 0x7D, detected_param);
 548                 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 549                         lgs8gxx_write_reg(priv, 0xC0, detected_param);
 550         }
 551         /* lgs8gxx_soft_reset(priv); */
 552
 553         /* Enter manual mode */
 554         lgs8gxx_set_mode_manual(priv);
 555
 556         switch (gi) {
 557         case GI_945:
 558                 priv->curr_gi = 945; break;
 559         case GI_595:
 560                 priv->curr_gi = 595; break;
 561         case GI_420:
 562                 priv->curr_gi = 420; break;
 563         default:
 564                 priv->curr_gi = 945; break;
 565         }
 566 }
 567
 568 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
 569         u8 serial, u8 clk_pol, u8 clk_gated)
 570 {
 571         int ret = 0;
 572         u8 t, reg_addr;
 573
 574         reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
 575         ret = lgs8gxx_read_reg(priv, reg_addr, &t);
 576         if (ret != 0)
 577                 return ret;
 578
 579         t &= 0xF8;
 580         t |= serial ? TS_SERIAL : TS_PARALLEL;
 581         t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
 582         t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
 583
 584         ret = lgs8gxx_write_reg(priv, reg_addr, t);
 585         if (ret != 0)
 586                 return ret;
 587
 588         return 0;
 589 }
 590
 591 /* A/D input peak-to-peak voltage range */
 592 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
 593         u8 sel)
 594 {
 595         u8 r26 = 0x73, r27 = 0x90;
 596
 597         if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
 598                 return 0;
 599
 600         r26 |= (sel & 0x01) << 7;
 601         r27 |= (sel & 0x02) >> 1;
 602         lgs8gxx_write_reg(priv, 0x26, r26);
 603         lgs8gxx_write_reg(priv, 0x27, r27);
 604
 605         return 0;
 606 }
 607
 608 /* LGS8913 demod frontend functions */
 609
 610 static int lgs8913_init(struct lgs8gxx_state *priv)
 611 {
 612         u8 t;
 613
 614         /* LGS8913 specific */
 615         lgs8gxx_write_reg(priv, 0xc1, 0x3);
 616
 617         lgs8gxx_read_reg(priv, 0x7c, &t);
 618         lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
 619
 620         /* LGS8913 specific */
 621         lgs8gxx_read_reg(priv, 0xc3, &t);
 622         lgs8gxx_write_reg(priv, 0xc3, t&0x10);
 623
 624
 625         return 0;
 626 }
 627
 628 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
 629 {
 630         const u8 *p = lgs8g75_initdat;
 631         int i;
 632
 633         lgs8gxx_write_reg(priv, 0xC6, 0x40);
 634
 635         lgs8gxx_write_reg(priv, 0x3D, 0x04);
 636         lgs8gxx_write_reg(priv, 0x39, 0x00);
 637
 638         lgs8gxx_write_reg(priv, 0x3A, 0x00);
 639         lgs8gxx_write_reg(priv, 0x38, 0x00);
 640         lgs8gxx_write_reg(priv, 0x3B, 0x00);
 641         lgs8gxx_write_reg(priv, 0x38, 0x00);
 642
 643         for (i = 0; i < sizeof(lgs8g75_initdat); i++) {
 644                 lgs8gxx_write_reg(priv, 0x38, 0x00);
 645                 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
 646                 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
 647                 lgs8gxx_write_reg(priv, 0x3C, *p);
 648                 p++;
 649         }
 650
 651         lgs8gxx_write_reg(priv, 0x38, 0x00);
 652
 653         return 0;
 654 }
 655
 656 static int lgs8gxx_init(struct dvb_frontend *fe)
 657 {
 658         struct lgs8gxx_state *priv =
 659                 (struct lgs8gxx_state *)fe->demodulator_priv;
 660         const struct lgs8gxx_config *config = priv->config;
 661         u8 data = 0;
 662         s8 err;
 663         dprintk("%s\n", __func__);
 664
 665         lgs8gxx_read_reg(priv, 0, &data);
 666         dprintk("reg 0 = 0x%02X\n", data);
 667
 668         if (config->prod == LGS8GXX_PROD_LGS8G75)
 669                 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
 670
 671         /* Setup MPEG output format */
 672         err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
 673                                     config->ts_clk_pol,
 674                                     config->ts_clk_gated);
 675         if (err != 0)
 676                 return -EIO;
 677
 678         if (config->prod == LGS8GXX_PROD_LGS8913)
 679                 lgs8913_init(priv);
 680         lgs8gxx_set_if_freq(priv, priv->config->if_freq);
 681         lgs8gxx_set_ad_mode(priv);
 682
 683         return 0;
 684 }
 685
 686 static void lgs8gxx_release(struct dvb_frontend *fe)
 687 {
 688         struct lgs8gxx_state *state = fe->demodulator_priv;
 689         dprintk("%s\n", __func__);
 690
 691         kfree(state);
 692 }
 693
 694
 695 static int lgs8gxx_write(struct dvb_frontend *fe, u8 *buf, int len)
 696 {
 697         struct lgs8gxx_state *priv = fe->demodulator_priv;
 698
 699         if (len != 2)
 700                 return -EINVAL;
 701
 702         return lgs8gxx_write_reg(priv, buf[0], buf[1]);
 703 }
 704
 705 static int lgs8gxx_set_fe(struct dvb_frontend *fe,
 706                           struct dvb_frontend_parameters *fe_params)
 707 {
 708         struct lgs8gxx_state *priv = fe->demodulator_priv;
 709
 710         dprintk("%s\n", __func__);
 711
 712         /* set frequency */
 713         if (fe->ops.tuner_ops.set_params) {
 714                 fe->ops.tuner_ops.set_params(fe, fe_params);
 715                 if (fe->ops.i2c_gate_ctrl)
 716                         fe->ops.i2c_gate_ctrl(fe, 0);
 717         }
 718
 719         /* start auto lock */
 720         lgs8gxx_auto_lock(priv);
 721
 722         msleep(10);
 723
 724         return 0;
 725 }
 726
 727 static int lgs8gxx_get_fe(struct dvb_frontend *fe,
 728                           struct dvb_frontend_parameters *fe_params)
 729 {
 730         dprintk("%s\n", __func__);
 731
 732         /* TODO: get real readings from device */
 733         /* inversion status */
 734         fe_params->inversion = INVERSION_OFF;
 735
 736         /* bandwidth */
 737         fe_params->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
 738
 739         fe_params->u.ofdm.code_rate_HP = FEC_AUTO;
 740         fe_params->u.ofdm.code_rate_LP = FEC_AUTO;
 741
 742         fe_params->u.ofdm.constellation = QAM_AUTO;
 743
 744         /* transmission mode */
 745         fe_params->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
 746
 747         /* guard interval */
 748         fe_params->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
 749
 750         /* hierarchy */
 751         fe_params->u.ofdm.hierarchy_information = HIERARCHY_NONE;
 752
 753         return 0;
 754 }
 755
 756 static
 757 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
 758                               struct dvb_frontend_tune_settings *fesettings)
 759 {
 760         /* FIXME: copy from tda1004x.c */
 761         fesettings->min_delay_ms = 800;
 762         fesettings->step_size = 0;
 763         fesettings->max_drift = 0;
 764         return 0;
 765 }
 766
 767 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
 768 {
 769         struct lgs8gxx_state *priv = fe->demodulator_priv;
 770         s8 ret;
 771         u8 t, locked = 0;
 772
 773         dprintk("%s\n", __func__);
 774         *fe_status = 0;
 775
 776         lgs8gxx_get_afc_phase(priv);
 777         lgs8gxx_is_locked(priv, &locked);
 778         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 779                 if (locked)
 780                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 781                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 782                 return 0;
 783         }
 784
 785         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 786         if (ret != 0)
 787                 return -EIO;
 788
 789         dprintk("Reg 0x4B: 0x%02X\n", t);
 790
 791         *fe_status = 0;
 792         if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
 793                 if ((t & 0x40) == 0x40)
 794                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 795                 if ((t & 0x80) == 0x80)
 796                         *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
 797                                 FE_HAS_LOCK;
 798         } else {
 799                 if ((t & 0x80) == 0x80)
 800                         *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 801                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 802         }
 803
 804         /* success */
 805         dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
 806         return 0;
 807 }
 808
 809 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
 810 {
 811         u16 v;
 812         u8 agc_lvl[2], cat;
 813
 814         dprintk("%s()\n", __func__);
 815         lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
 816         lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
 817
 818         v = agc_lvl[0];
 819         v <<= 8;
 820         v |= agc_lvl[1];
 821
 822         dprintk("agc_lvl: 0x%04X\n", v);
 823
 824         if (v < 0x100)
 825                 cat = 0;
 826         else if (v < 0x190)
 827                 cat = 5;
 828         else if (v < 0x2A8)
 829                 cat = 4;
 830         else if (v < 0x381)
 831                 cat = 3;
 832         else if (v < 0x400)
 833                 cat = 2;
 834         else if (v == 0x400)
 835                 cat = 1;
 836         else
 837                 cat = 0;
 838
 839         *signal = cat * 65535 / 5;
 840
 841         return 0;
 842 }
 843
 844 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 845 {
 846         u8 t; s8 ret;
 847         s16 max_strength = 0;
 848         u8 str;
 849         u16 i, gi = priv->curr_gi;
 850
 851         dprintk("%s\n", __func__);
 852
 853         ret = lgs8gxx_read_reg(priv, 0x4B, &t);
 854         if (ret != 0)
 855                 return -EIO;
 856
 857         if (fake_signal_str) {
 858                 if ((t & 0xC0) == 0xC0) {
 859                         dprintk("Fake signal strength\n");
 860                         *signal = 0x7FFF;
 861                 } else
 862                         *signal = 0;
 863                 return 0;
 864         }
 865
 866         dprintk("gi = %d\n", gi);
 867         for (i = 0; i < gi; i++) {
 868
 869                 if ((i & 0xFF) == 0)
 870                         lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
 871                 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
 872
 873                 lgs8gxx_read_reg(priv, 0x94, &str);
 874                 if (max_strength < str)
 875                         max_strength = str;
 876         }
 877
 878         *signal = max_strength;
 879         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 880
 881         lgs8gxx_read_reg(priv, 0x95, &t);
 882         dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
 883
 884         return 0;
 885 }
 886
 887 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
 888 {
 889         u8 t;
 890         s16 v = 0;
 891
 892         dprintk("%s\n", __func__);
 893
 894         lgs8gxx_read_reg(priv, 0xB1, &t);
 895         v |= t;
 896         v <<= 8;
 897         lgs8gxx_read_reg(priv, 0xB0, &t);
 898         v |= t;
 899
 900         *signal = v;
 901         dprintk("%s: signal=0x%02X\n", __func__, *signal);
 902
 903         return 0;
 904 }
 905
 906 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
 907 {
 908         struct lgs8gxx_state *priv = fe->demodulator_priv;
 909
 910         if (priv->config->prod == LGS8GXX_PROD_LGS8913)
 911                 return lgs8913_read_signal_strength(priv, signal);
 912         else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 913                 return lgs8g75_read_signal_strength(priv, signal);
 914         else
 915                 return lgs8gxx_read_signal_agc(priv, signal);
 916 }
 917
 918 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
 919 {
 920         struct lgs8gxx_state *priv = fe->demodulator_priv;
 921         u8 t;
 922         *snr = 0;
 923
 924         if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
 925                 lgs8gxx_read_reg(priv, 0x34, &t);
 926         else
 927                 lgs8gxx_read_reg(priv, 0x95, &t);
 928         dprintk("AVG Noise=0x%02X\n", t);
 929         *snr = 256 - t;
 930         *snr <<= 8;
 931         dprintk("snr=0x%x\n", *snr);
 932
 933         return 0;
 934 }
 935
 936 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 937 {
 938         *ucblocks = 0;
 939         dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
 940         return 0;
 941 }
 942
 943 static void packet_counter_start(struct lgs8gxx_state *priv)
 944 {
 945         u8 orig, t;
 946
 947         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 948                 lgs8gxx_read_reg(priv, 0x30, &orig);
 949                 orig &= 0xE7;
 950                 t = orig | 0x10;
 951                 lgs8gxx_write_reg(priv, 0x30, t);
 952                 t = orig | 0x18;
 953                 lgs8gxx_write_reg(priv, 0x30, t);
 954                 t = orig | 0x10;
 955                 lgs8gxx_write_reg(priv, 0x30, t);
 956         } else {
 957                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 958                 lgs8gxx_write_reg(priv, 0xC6, 0x41);
 959                 lgs8gxx_write_reg(priv, 0xC6, 0x01);
 960         }
 961 }
 962
 963 static void packet_counter_stop(struct lgs8gxx_state *priv)
 964 {
 965         u8 t;
 966
 967         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 968                 lgs8gxx_read_reg(priv, 0x30, &t);
 969                 t &= 0xE7;
 970                 lgs8gxx_write_reg(priv, 0x30, t);
 971         } else {
 972                 lgs8gxx_write_reg(priv, 0xC6, 0x81);
 973         }
 974 }
 975
 976 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
 977 {
 978         struct lgs8gxx_state *priv = fe->demodulator_priv;
 979         u8 reg_err, reg_total, t;
 980         u32 total_cnt = 0, err_cnt = 0;
 981         int i;
 982
 983         dprintk("%s\n", __func__);
 984
 985         packet_counter_start(priv);
 986         msleep(200);
 987         packet_counter_stop(priv);
 988
 989         if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
 990                 reg_total = 0x28; reg_err = 0x2C;
 991         } else {
 992                 reg_total = 0xD0; reg_err = 0xD4;
 993         }
 994
 995         for (i = 0; i < 4; i++) {
 996                 total_cnt <<= 8;
 997                 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
 998                 total_cnt |= t;
 999         }
1000         for (i = 0; i < 4; i++) {
1001                 err_cnt <<= 8;
1002                 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
1003                 err_cnt |= t;
1004         }
1005         dprintk("error=%d total=%d\n", err_cnt, total_cnt);
1006
1007         if (total_cnt == 0)
1008                 *ber = 0;
1009         else
1010                 *ber = err_cnt * 100 / total_cnt;
1011
1012         dprintk("%s: ber=0x%x\n", __func__, *ber);
1013         return 0;
1014 }
1015
1016 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
1017 {
1018         struct lgs8gxx_state *priv = fe->demodulator_priv;
1019
1020         if (priv->config->tuner_address == 0)
1021                 return 0;
1022         if (enable) {
1023                 u8 v = 0x80 | priv->config->tuner_address;
1024                 return lgs8gxx_write_reg(priv, 0x01, v);
1025         }
1026         return lgs8gxx_write_reg(priv, 0x01, 0);
1027 }
1028
1029 static struct dvb_frontend_ops lgs8gxx_ops = {
1030         .info = {
1031                 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
1032                 .type = FE_OFDM,
1033                 .frequency_min = 474000000,
1034                 .frequency_max = 858000000,
1035                 .frequency_stepsize = 10000,
1036                 .caps =
1037                         FE_CAN_FEC_AUTO |
1038                         FE_CAN_QAM_AUTO |
1039                         FE_CAN_TRANSMISSION_MODE_AUTO |
1040                         FE_CAN_GUARD_INTERVAL_AUTO
1041         },
1042
1043         .release = lgs8gxx_release,
1044
1045         .init = lgs8gxx_init,
1046         .write = lgs8gxx_write,
1047         .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1048
1049         .set_frontend = lgs8gxx_set_fe,
1050         .get_frontend = lgs8gxx_get_fe,
1051         .get_tune_settings = lgs8gxx_get_tune_settings,
1052
1053         .read_status = lgs8gxx_read_status,
1054         .read_ber = lgs8gxx_read_ber,
1055         .read_signal_strength = lgs8gxx_read_signal_strength,
1056         .read_snr = lgs8gxx_read_snr,
1057         .read_ucblocks = lgs8gxx_read_ucblocks,
1058 };
1059
1060 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1061         struct i2c_adapter *i2c)
1062 {
1063         struct lgs8gxx_state *priv = NULL;
1064         u8 data = 0;
1065
1066         dprintk("%s()\n", __func__);
1067
1068         if (config == NULL || i2c == NULL)
1069                 return NULL;
1070
1071         priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1072         if (priv == NULL)
1073                 goto error_out;
1074
1075         priv->config = config;
1076         priv->i2c = i2c;
1077
1078         /* check if the demod is there */
1079         if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1080                 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1081                         __func__, priv->config->demod_address);
1082                 goto error_out;
1083         }
1084
1085         lgs8gxx_read_reg(priv, 1, &data);
1086
1087         memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1088                sizeof(struct dvb_frontend_ops));
1089         priv->frontend.demodulator_priv = priv;
1090
1091         if (config->prod == LGS8GXX_PROD_LGS8G75)
1092                 lgs8g75_init_data(priv);
1093
1094         return &priv->frontend;
1095
1096 error_out:
1097         dprintk("%s() error_out\n", __func__);
1098         kfree(priv);
1099         return NULL;
1100
1101 }
1102 EXPORT_SYMBOL(lgs8gxx_attach);
1103
1104 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1105 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1106 MODULE_LICENSE("GPL");