git.oblomov.eu Git - linux-2.6/blob - drivers/media/common/tuners/tda8290.c

   1 /*
   2
   3    i2c tv tuner chip device driver
   4    controls the philips tda8290+75 tuner chip combo.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20    This "tda8290" module was split apart from the original "tuner" module.
  21 */
  22
  23 #include <linux/i2c.h>
  24 #include <linux/delay.h>
  25 #include <linux/videodev.h>
  26 #include "tuner-i2c.h"
  27 #include "tda8290.h"
  28 #include "tda827x.h"
  29 #include "tda18271.h"
  30
  31 static int debug;
  32 module_param(debug, int, 0644);
  33 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  34
  35 static int deemphasis_50;
  36 MODULE_PARM_DESC(deemphasis_50, "0 - 75us deemphasis; 1 - 50us deemphasis");
  37
  38 /* ---------------------------------------------------------------------- */
  39
  40 struct tda8290_priv {
  41         struct tuner_i2c_props i2c_props;
  42
  43         unsigned char tda8290_easy_mode;
  44
  45         unsigned char tda827x_addr;
  46
  47         unsigned char ver;
  48 #define TDA8290   1
  49 #define TDA8295   2
  50 #define TDA8275   4
  51 #define TDA8275A  8
  52 #define TDA18271 16
  53
  54         struct tda827x_config cfg;
  55 };
  56
  57 /*---------------------------------------------------------------------*/
  58
  59 static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
  60 {
  61         struct tda8290_priv *priv = fe->analog_demod_priv;
  62
  63         unsigned char  enable[2] = { 0x21, 0xC0 };
  64         unsigned char disable[2] = { 0x21, 0x00 };
  65         unsigned char *msg;
  66
  67         if (close) {
  68                 msg = enable;
  69                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  70                 /* let the bridge stabilize */
  71                 msleep(20);
  72         } else {
  73                 msg = disable;
  74                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  75         }
  76
  77         return 0;
  78 }
  79
  80 static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
  81 {
  82         struct tda8290_priv *priv = fe->analog_demod_priv;
  83
  84         unsigned char  enable[2] = { 0x45, 0xc1 };
  85         unsigned char disable[2] = { 0x46, 0x00 };
  86         unsigned char buf[3] = { 0x45, 0x01, 0x00 };
  87         unsigned char *msg;
  88
  89         if (close) {
  90                 msg = enable;
  91                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  92                 /* let the bridge stabilize */
  93                 msleep(20);
  94         } else {
  95                 msg = disable;
  96                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 1);
  97                 tuner_i2c_xfer_recv(&priv->i2c_props, &msg[1], 1);
  98
  99                 buf[2] = msg[1];
 100                 buf[2] &= ~0x04;
 101                 tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
 102                 msleep(5);
 103
 104                 msg[1] |= 0x04;
 105                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
 106         }
 107
 108         return 0;
 109 }
 110
 111 /*---------------------------------------------------------------------*/
 112
 113 static void set_audio(struct dvb_frontend *fe,
 114                       struct analog_parameters *params)
 115 {
 116         struct tda8290_priv *priv = fe->analog_demod_priv;
 117         char* mode;
 118
 119         if (params->std & V4L2_STD_MN) {
 120                 priv->tda8290_easy_mode = 0x01;
 121                 mode = "MN";
 122         } else if (params->std & V4L2_STD_B) {
 123                 priv->tda8290_easy_mode = 0x02;
 124                 mode = "B";
 125         } else if (params->std & V4L2_STD_GH) {
 126                 priv->tda8290_easy_mode = 0x04;
 127                 mode = "GH";
 128         } else if (params->std & V4L2_STD_PAL_I) {
 129                 priv->tda8290_easy_mode = 0x08;
 130                 mode = "I";
 131         } else if (params->std & V4L2_STD_DK) {
 132                 priv->tda8290_easy_mode = 0x10;
 133                 mode = "DK";
 134         } else if (params->std & V4L2_STD_SECAM_L) {
 135                 priv->tda8290_easy_mode = 0x20;
 136                 mode = "L";
 137         } else if (params->std & V4L2_STD_SECAM_LC) {
 138                 priv->tda8290_easy_mode = 0x40;
 139                 mode = "LC";
 140         } else {
 141                 priv->tda8290_easy_mode = 0x10;
 142                 mode = "xx";
 143         }
 144
 145         if (params->mode == V4L2_TUNER_RADIO) {
 146                 priv->tda8290_easy_mode = 0x01;         /* Start with MN values */
 147                 tuner_dbg("setting to radio FM\n");
 148         } else {
 149                 tuner_dbg("setting tda829x to system %s\n", mode);
 150         }
 151 }
 152
 153 static struct {
 154         unsigned char seq[2];
 155 } fm_mode[] = {
 156         { { 0x01, 0x81} },      /* Put device into expert mode */
 157         { { 0x03, 0x48} },      /* Disable NOTCH and VIDEO filters */
 158         { { 0x04, 0x04} },      /* Disable color carrier filter (SSIF) */
 159         { { 0x05, 0x04} },      /* ADC headroom */
 160         { { 0x06, 0x10} },      /* group delay flat */
 161
 162         { { 0x07, 0x00} },      /* use the same radio DTO values as a tda8295 */
 163         { { 0x08, 0x00} },
 164         { { 0x09, 0x80} },
 165         { { 0x0a, 0xda} },
 166         { { 0x0b, 0x4b} },
 167         { { 0x0c, 0x68} },
 168
 169         { { 0x0d, 0x00} },      /* PLL off, no video carrier detect */
 170         { { 0x14, 0x00} },      /* disable auto mute if no video */
 171 };
 172
 173 static void tda8290_set_params(struct dvb_frontend *fe,
 174                                struct analog_parameters *params)
 175 {
 176         struct tda8290_priv *priv = fe->analog_demod_priv;
 177
 178         unsigned char soft_reset[]  = { 0x00, 0x00 };
 179         unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 180         unsigned char expert_mode[] = { 0x01, 0x80 };
 181         unsigned char agc_out_on[]  = { 0x02, 0x00 };
 182         unsigned char gainset_off[] = { 0x28, 0x14 };
 183         unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 184         unsigned char adc_head_6[]  = { 0x05, 0x04 };
 185         unsigned char adc_head_9[]  = { 0x05, 0x02 };
 186         unsigned char adc_head_12[] = { 0x05, 0x01 };
 187         unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 188         unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 189         unsigned char gainset_2[]   = { 0x28, 0x64 };
 190         unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 191         unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 192         unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 193         unsigned char addr_adc_sat  = 0x1a;
 194         unsigned char addr_agc_stat = 0x1d;
 195         unsigned char addr_pll_stat = 0x1b;
 196         unsigned char adc_sat, agc_stat,
 197                       pll_stat;
 198         int i;
 199
 200         set_audio(fe, params);
 201
 202         if (priv->cfg.config)
 203                 tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
 204         tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 205         tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 206         tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 207         msleep(1);
 208
 209         if (params->mode == V4L2_TUNER_RADIO) {
 210                 unsigned char deemphasis[]  = { 0x13, 1 };
 211
 212                 /* FIXME: allow using a different deemphasis */
 213
 214                 if (deemphasis_50)
 215                         deemphasis[1] = 2;
 216
 217                 for (i = 0; i < ARRAY_SIZE(fm_mode); i++)
 218                         tuner_i2c_xfer_send(&priv->i2c_props, fm_mode[i].seq, 2);
 219
 220                 tuner_i2c_xfer_send(&priv->i2c_props, deemphasis, 2);
 221         } else {
 222                 expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 223                 tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 224                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 225                 tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 226                 if (priv->tda8290_easy_mode & 0x60)
 227                         tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 228                 else
 229                         tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 230                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 231         }
 232
 233         tda8290_i2c_bridge(fe, 1);
 234
 235         if (fe->ops.tuner_ops.set_analog_params)
 236                 fe->ops.tuner_ops.set_analog_params(fe, params);
 237
 238         for (i = 0; i < 3; i++) {
 239                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 240                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 241                 if (pll_stat & 0x80) {
 242                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 243                         tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 244                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 245                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 246                         tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 247                         break;
 248                 } else {
 249                         tuner_dbg("tda8290 not locked, no signal?\n");
 250                         msleep(100);
 251                 }
 252         }
 253         /* adjust headroom resp. gain */
 254         if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 255                 tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 256                            agc_stat, adc_sat, pll_stat & 0x80);
 257                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 258                 msleep(100);
 259                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 260                 tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 261                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 262                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 263                 if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 264                         tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 265                                    agc_stat, pll_stat & 0x80);
 266                         if (priv->cfg.agcf)
 267                                 priv->cfg.agcf(fe);
 268                         msleep(100);
 269                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 270                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 271                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 272                         tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 273                         if((agc_stat > 115) || !(pll_stat & 0x80)) {
 274                                 tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 275                                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 276                                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 277                                 msleep(100);
 278                         }
 279                 }
 280         }
 281
 282         /* l/ l' deadlock? */
 283         if(priv->tda8290_easy_mode & 0x60) {
 284                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 285                 tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 286                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 287                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 288                 if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 289                         tuner_dbg("trying to resolve SECAM L deadlock\n");
 290                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 291                         msleep(40);
 292                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 293                 }
 294         }
 295
 296         tda8290_i2c_bridge(fe, 0);
 297         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
 298 }
 299
 300 /*---------------------------------------------------------------------*/
 301
 302 static void tda8295_power(struct dvb_frontend *fe, int enable)
 303 {
 304         struct tda8290_priv *priv = fe->analog_demod_priv;
 305         unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */
 306
 307         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 308         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 309
 310         if (enable)
 311                 buf[1] = 0x01;
 312         else
 313                 buf[1] = 0x03;
 314
 315         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 316 }
 317
 318 static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
 319 {
 320         struct tda8290_priv *priv = fe->analog_demod_priv;
 321         unsigned char buf[] = { 0x01, 0x00 };
 322
 323         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 324         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 325
 326         if (enable)
 327                 buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
 328         else
 329                 buf[1] = 0x00; /* reset active bit */
 330
 331         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 332 }
 333
 334 static void tda8295_set_video_std(struct dvb_frontend *fe)
 335 {
 336         struct tda8290_priv *priv = fe->analog_demod_priv;
 337         unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
 338
 339         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 340
 341         tda8295_set_easy_mode(fe, 1);
 342         msleep(20);
 343         tda8295_set_easy_mode(fe, 0);
 344 }
 345
 346 /*---------------------------------------------------------------------*/
 347
 348 static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
 349 {
 350         struct tda8290_priv *priv = fe->analog_demod_priv;
 351         unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
 352
 353         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 354         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 355
 356         if (enable)
 357                 buf[1] &= ~0x40;
 358         else
 359                 buf[1] |= 0x40;
 360
 361         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 362 }
 363
 364 static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
 365 {
 366         struct tda8290_priv *priv = fe->analog_demod_priv;
 367         unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
 368         unsigned char set_gpio_val[]   = { 0x46, 0x00 };
 369
 370         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_cf[0], 1);
 371         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_cf[1], 1);
 372         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_val[0], 1);
 373         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_val[1], 1);
 374
 375         set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
 376
 377         if (enable) {
 378                 set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
 379                 set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
 380         }
 381         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
 382         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
 383 }
 384
 385 static int tda8295_has_signal(struct dvb_frontend *fe)
 386 {
 387         struct tda8290_priv *priv = fe->analog_demod_priv;
 388
 389         unsigned char hvpll_stat = 0x26;
 390         unsigned char ret;
 391
 392         tuner_i2c_xfer_send(&priv->i2c_props, &hvpll_stat, 1);
 393         tuner_i2c_xfer_recv(&priv->i2c_props, &ret, 1);
 394         return (ret & 0x01) ? 65535 : 0;
 395 }
 396
 397 /*---------------------------------------------------------------------*/
 398
 399 static void tda8295_set_params(struct dvb_frontend *fe,
 400                                struct analog_parameters *params)
 401 {
 402         struct tda8290_priv *priv = fe->analog_demod_priv;
 403
 404         unsigned char blanking_mode[]     = { 0x1d, 0x00 };
 405
 406         set_audio(fe, params);
 407
 408         tuner_dbg("%s: freq = %d\n", __func__, params->frequency);
 409
 410         tda8295_power(fe, 1);
 411         tda8295_agc1_out(fe, 1);
 412
 413         tuner_i2c_xfer_send(&priv->i2c_props, &blanking_mode[0], 1);
 414         tuner_i2c_xfer_recv(&priv->i2c_props, &blanking_mode[1], 1);
 415
 416         tda8295_set_video_std(fe);
 417
 418         blanking_mode[1] = 0x03;
 419         tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
 420         msleep(20);
 421
 422         tda8295_i2c_bridge(fe, 1);
 423
 424         if (fe->ops.tuner_ops.set_analog_params)
 425                 fe->ops.tuner_ops.set_analog_params(fe, params);
 426
 427         if (priv->cfg.agcf)
 428                 priv->cfg.agcf(fe);
 429
 430         if (tda8295_has_signal(fe))
 431                 tuner_dbg("tda8295 is locked\n");
 432         else
 433                 tuner_dbg("tda8295 not locked, no signal?\n");
 434
 435         tda8295_i2c_bridge(fe, 0);
 436 }
 437
 438 /*---------------------------------------------------------------------*/
 439
 440 static int tda8290_has_signal(struct dvb_frontend *fe)
 441 {
 442         struct tda8290_priv *priv = fe->analog_demod_priv;
 443
 444         unsigned char i2c_get_afc[1] = { 0x1B };
 445         unsigned char afc = 0;
 446
 447         tuner_i2c_xfer_send(&priv->i2c_props, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 448         tuner_i2c_xfer_recv(&priv->i2c_props, &afc, 1);
 449         return (afc & 0x80)? 65535:0;
 450 }
 451
 452 /*---------------------------------------------------------------------*/
 453
 454 static void tda8290_standby(struct dvb_frontend *fe)
 455 {
 456         struct tda8290_priv *priv = fe->analog_demod_priv;
 457
 458         unsigned char cb1[] = { 0x30, 0xD0 };
 459         unsigned char tda8290_standby[] = { 0x00, 0x02 };
 460         unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 461         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 462
 463         tda8290_i2c_bridge(fe, 1);
 464         if (priv->ver & TDA8275A)
 465                 cb1[1] = 0x90;
 466         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 467         tda8290_i2c_bridge(fe, 0);
 468         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
 469         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
 470 }
 471
 472 static void tda8295_standby(struct dvb_frontend *fe)
 473 {
 474         tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */
 475
 476         tda8295_power(fe, 0);
 477 }
 478
 479 static void tda8290_init_if(struct dvb_frontend *fe)
 480 {
 481         struct tda8290_priv *priv = fe->analog_demod_priv;
 482
 483         unsigned char set_VS[] = { 0x30, 0x6F };
 484         unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 485         unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 486
 487         if ((priv->cfg.config == 1) || (priv->cfg.config == 2))
 488                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 489         else
 490                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 491         tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 492 }
 493
 494 static void tda8295_init_if(struct dvb_frontend *fe)
 495 {
 496         struct tda8290_priv *priv = fe->analog_demod_priv;
 497
 498         static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
 499         static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
 500         static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
 501         static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
 502         static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
 503         static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
 504         static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
 505
 506         tda8295_power(fe, 1);
 507
 508         tda8295_set_easy_mode(fe, 0);
 509         tda8295_set_video_std(fe);
 510
 511         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
 512         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
 513         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
 514         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
 515         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
 516         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
 517         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
 518
 519         tda8295_agc1_out(fe, 0);
 520         tda8295_agc2_out(fe, 0);
 521 }
 522
 523 static void tda8290_init_tuner(struct dvb_frontend *fe)
 524 {
 525         struct tda8290_priv *priv = fe->analog_demod_priv;
 526         unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 527                                           0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 528         unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 529                                           0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 530         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 531                               .buf=tda8275_init, .len = 14};
 532         if (priv->ver & TDA8275A)
 533                 msg.buf = tda8275a_init;
 534
 535         tda8290_i2c_bridge(fe, 1);
 536         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 537         tda8290_i2c_bridge(fe, 0);
 538 }
 539
 540 /*---------------------------------------------------------------------*/
 541
 542 static void tda829x_release(struct dvb_frontend *fe)
 543 {
 544         struct tda8290_priv *priv = fe->analog_demod_priv;
 545
 546         /* only try to release the tuner if we've
 547          * attached it from within this module */
 548         if (priv->ver & (TDA18271 | TDA8275 | TDA8275A))
 549                 if (fe->ops.tuner_ops.release)
 550                         fe->ops.tuner_ops.release(fe);
 551
 552         kfree(fe->analog_demod_priv);
 553         fe->analog_demod_priv = NULL;
 554 }
 555
 556 static struct tda18271_config tda829x_tda18271_config = {
 557         .gate    = TDA18271_GATE_ANALOG,
 558 };
 559
 560 static int tda829x_find_tuner(struct dvb_frontend *fe)
 561 {
 562         struct tda8290_priv *priv = fe->analog_demod_priv;
 563         struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
 564         int i, ret, tuners_found;
 565         u32 tuner_addrs;
 566         u8 data;
 567         struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
 568
 569         if (NULL == analog_ops->i2c_gate_ctrl)
 570                 return -EINVAL;
 571
 572         analog_ops->i2c_gate_ctrl(fe, 1);
 573
 574         /* probe for tuner chip */
 575         tuners_found = 0;
 576         tuner_addrs = 0;
 577         for (i = 0x60; i <= 0x63; i++) {
 578                 msg.addr = i;
 579                 ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 580                 if (ret == 1) {
 581                         tuners_found++;
 582                         tuner_addrs = (tuner_addrs << 8) + i;
 583                 }
 584         }
 585         /* if there is more than one tuner, we expect the right one is
 586            behind the bridge and we choose the highest address that doesn't
 587            give a response now
 588          */
 589
 590         analog_ops->i2c_gate_ctrl(fe, 0);
 591
 592         if (tuners_found > 1)
 593                 for (i = 0; i < tuners_found; i++) {
 594                         msg.addr = tuner_addrs  & 0xff;
 595                         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 596                         if (ret == 1)
 597                                 tuner_addrs = tuner_addrs >> 8;
 598                         else
 599                                 break;
 600                 }
 601
 602         if (tuner_addrs == 0) {
 603                 tuner_addrs = 0x60;
 604                 tuner_info("could not clearly identify tuner address, "
 605                            "defaulting to %x\n", tuner_addrs);
 606         } else {
 607                 tuner_addrs = tuner_addrs & 0xff;
 608                 tuner_info("setting tuner address to %x\n", tuner_addrs);
 609         }
 610         priv->tda827x_addr = tuner_addrs;
 611         msg.addr = tuner_addrs;
 612
 613         analog_ops->i2c_gate_ctrl(fe, 1);
 614         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 615
 616         if (ret != 1) {
 617                 tuner_warn("tuner access failed!\n");
 618                 return -EREMOTEIO;
 619         }
 620
 621         if ((data == 0x83) || (data == 0x84)) {
 622                 priv->ver |= TDA18271;
 623                 dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
 624                            priv->i2c_props.adap, &tda829x_tda18271_config);
 625         } else {
 626                 if ((data & 0x3c) == 0)
 627                         priv->ver |= TDA8275;
 628                 else
 629                         priv->ver |= TDA8275A;
 630
 631                 dvb_attach(tda827x_attach, fe, priv->tda827x_addr,
 632                            priv->i2c_props.adap, &priv->cfg);
 633                 priv->cfg.switch_addr = priv->i2c_props.addr;
 634         }
 635         if (fe->ops.tuner_ops.init)
 636                 fe->ops.tuner_ops.init(fe);
 637
 638         if (fe->ops.tuner_ops.sleep)
 639                 fe->ops.tuner_ops.sleep(fe);
 640
 641         analog_ops->i2c_gate_ctrl(fe, 0);
 642
 643         return 0;
 644 }
 645
 646 static int tda8290_probe(struct tuner_i2c_props *i2c_props)
 647 {
 648 #define TDA8290_ID 0x89
 649         unsigned char tda8290_id[] = { 0x1f, 0x00 };
 650
 651         /* detect tda8290 */
 652         tuner_i2c_xfer_send(i2c_props, &tda8290_id[0], 1);
 653         tuner_i2c_xfer_recv(i2c_props, &tda8290_id[1], 1);
 654
 655         if (tda8290_id[1] == TDA8290_ID) {
 656                 if (debug)
 657                         printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
 658                                __func__, i2c_adapter_id(i2c_props->adap),
 659                                i2c_props->addr);
 660                 return 0;
 661         }
 662
 663         return -ENODEV;
 664 }
 665
 666 static int tda8295_probe(struct tuner_i2c_props *i2c_props)
 667 {
 668 #define TDA8295_ID 0x8a
 669         unsigned char tda8295_id[] = { 0x2f, 0x00 };
 670
 671         /* detect tda8295 */
 672         tuner_i2c_xfer_send(i2c_props, &tda8295_id[0], 1);
 673         tuner_i2c_xfer_recv(i2c_props, &tda8295_id[1], 1);
 674
 675         if (tda8295_id[1] == TDA8295_ID) {
 676                 if (debug)
 677                         printk(KERN_DEBUG "%s: tda8295 detected @ %d-%04x\n",
 678                                __func__, i2c_adapter_id(i2c_props->adap),
 679                                i2c_props->addr);
 680                 return 0;
 681         }
 682
 683         return -ENODEV;
 684 }
 685
 686 static struct analog_demod_ops tda8290_ops = {
 687         .set_params     = tda8290_set_params,
 688         .has_signal     = tda8290_has_signal,
 689         .standby        = tda8290_standby,
 690         .release        = tda829x_release,
 691         .i2c_gate_ctrl  = tda8290_i2c_bridge,
 692 };
 693
 694 static struct analog_demod_ops tda8295_ops = {
 695         .set_params     = tda8295_set_params,
 696         .has_signal     = tda8295_has_signal,
 697         .standby        = tda8295_standby,
 698         .release        = tda829x_release,
 699         .i2c_gate_ctrl  = tda8295_i2c_bridge,
 700 };
 701
 702 struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
 703                                     struct i2c_adapter *i2c_adap, u8 i2c_addr,
 704                                     struct tda829x_config *cfg)
 705 {
 706         struct tda8290_priv *priv = NULL;
 707         char *name;
 708
 709         priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 710         if (priv == NULL)
 711                 return NULL;
 712         fe->analog_demod_priv = priv;
 713
 714         priv->i2c_props.addr     = i2c_addr;
 715         priv->i2c_props.adap     = i2c_adap;
 716         priv->i2c_props.name     = "tda829x";
 717         if (cfg)
 718                 priv->cfg.config         = cfg->lna_cfg;
 719
 720         if (tda8290_probe(&priv->i2c_props) == 0) {
 721                 priv->ver = TDA8290;
 722                 memcpy(&fe->ops.analog_ops, &tda8290_ops,
 723                        sizeof(struct analog_demod_ops));
 724         }
 725
 726         if (tda8295_probe(&priv->i2c_props) == 0) {
 727                 priv->ver = TDA8295;
 728                 memcpy(&fe->ops.analog_ops, &tda8295_ops,
 729                        sizeof(struct analog_demod_ops));
 730         }
 731
 732         if ((!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) &&
 733             (tda829x_find_tuner(fe) < 0))
 734                 goto fail;
 735
 736         switch (priv->ver) {
 737         case TDA8290:
 738                 name = "tda8290";
 739                 break;
 740         case TDA8295:
 741                 name = "tda8295";
 742                 break;
 743         case TDA8290 | TDA8275:
 744                 name = "tda8290+75";
 745                 break;
 746         case TDA8295 | TDA8275:
 747                 name = "tda8295+75";
 748                 break;
 749         case TDA8290 | TDA8275A:
 750                 name = "tda8290+75a";
 751                 break;
 752         case TDA8295 | TDA8275A:
 753                 name = "tda8295+75a";
 754                 break;
 755         case TDA8290 | TDA18271:
 756                 name = "tda8290+18271";
 757                 break;
 758         case TDA8295 | TDA18271:
 759                 name = "tda8295+18271";
 760                 break;
 761         default:
 762                 goto fail;
 763         }
 764         tuner_info("type set to %s\n", name);
 765
 766         fe->ops.analog_ops.info.name = name;
 767
 768         if (priv->ver & TDA8290) {
 769                 if (priv->ver & (TDA8275 | TDA8275A))
 770                         tda8290_init_tuner(fe);
 771                 tda8290_init_if(fe);
 772         } else if (priv->ver & TDA8295)
 773                 tda8295_init_if(fe);
 774
 775         return fe;
 776
 777 fail:
 778         tda829x_release(fe);
 779         return NULL;
 780 }
 781 EXPORT_SYMBOL_GPL(tda829x_attach);
 782
 783 int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
 784 {
 785         struct tuner_i2c_props i2c_props = {
 786                 .adap = i2c_adap,
 787                 .addr = i2c_addr,
 788         };
 789
 790         unsigned char soft_reset[]   = { 0x00, 0x00 };
 791         unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 792         unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 793         unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 794         unsigned char addr_dto_lsb = 0x07;
 795         unsigned char data;
 796 #define PROBE_BUFFER_SIZE 8
 797         unsigned char buf[PROBE_BUFFER_SIZE];
 798         int i;
 799
 800         /* rule out tda9887, which would return the same byte repeatedly */
 801         tuner_i2c_xfer_send(&i2c_props, soft_reset, 1);
 802         tuner_i2c_xfer_recv(&i2c_props, buf, PROBE_BUFFER_SIZE);
 803         for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
 804                 if (buf[i] != buf[0])
 805                         break;
 806         }
 807
 808         /* all bytes are equal, not a tda829x - probably a tda9887 */
 809         if (i == PROBE_BUFFER_SIZE)
 810                 return -ENODEV;
 811
 812         if ((tda8290_probe(&i2c_props) == 0) ||
 813             (tda8295_probe(&i2c_props) == 0))
 814                 return 0;
 815
 816         /* fall back to old probing method */
 817         tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 818         tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 819         tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 820         tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 821         if (data == 0) {
 822                 tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 823                 tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 824                 tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 825                 tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 826                 if (data == 0x7b) {
 827                         return 0;
 828                 }
 829         }
 830         tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 831         return -ENODEV;
 832 }
 833 EXPORT_SYMBOL_GPL(tda829x_probe);
 834
 835 MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 836 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
 837 MODULE_LICENSE("GPL");
 838
 839 /*
 840  * Overrides for Emacs so that we follow Linus's tabbing style.
 841  * ---------------------------------------------------------------------------
 842  * Local variables:
 843  * c-basic-offset: 8
 844  * End:
 845  */