drivers/media/video/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 #define PREFIX "tda8290"
  36
  37 /* ---------------------------------------------------------------------- */
  38
  39 struct tda8290_priv {
  40         struct tuner_i2c_props i2c_props;
  41
  42         unsigned char tda8290_easy_mode;
  43
  44         unsigned char tda827x_addr;
  45
  46         unsigned char ver;
  47 #define TDA8290   1
  48 #define TDA8295   2
  49 #define TDA8275   4
  50 #define TDA8275A  8
  51 #define TDA18271 16
  52
  53         struct tda827x_config cfg;
  54 };
  55
  56 /*---------------------------------------------------------------------*/
  57
  58 static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
  59 {
  60         struct tda8290_priv *priv = fe->analog_demod_priv;
  61
  62         unsigned char  enable[2] = { 0x21, 0xC0 };
  63         unsigned char disable[2] = { 0x21, 0x00 };
  64         unsigned char *msg;
  65
  66         if (close) {
  67                 msg = enable;
  68                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  69                 /* let the bridge stabilize */
  70                 msleep(20);
  71         } else {
  72                 msg = disable;
  73                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  74         }
  75
  76         return 0;
  77 }
  78
  79 static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
  80 {
  81         struct tda8290_priv *priv = fe->analog_demod_priv;
  82
  83         unsigned char  enable[2] = { 0x45, 0xc1 };
  84         unsigned char disable[2] = { 0x46, 0x00 };
  85         unsigned char buf[3] = { 0x45, 0x01, 0x00 };
  86         unsigned char *msg;
  87
  88         if (close) {
  89                 msg = enable;
  90                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  91                 /* let the bridge stabilize */
  92                 msleep(20);
  93         } else {
  94                 msg = disable;
  95                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 1);
  96                 tuner_i2c_xfer_recv(&priv->i2c_props, &msg[1], 1);
  97
  98                 buf[2] = msg[1];
  99                 buf[2] &= ~0x04;
 100                 tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
 101                 msleep(5);
 102
 103                 msg[1] |= 0x04;
 104                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
 105         }
 106
 107         return 0;
 108 }
 109
 110 /*---------------------------------------------------------------------*/
 111
 112 static void set_audio(struct dvb_frontend *fe,
 113                       struct analog_parameters *params)
 114 {
 115         struct tda8290_priv *priv = fe->analog_demod_priv;
 116         char* mode;
 117
 118         if (params->std & V4L2_STD_MN) {
 119                 priv->tda8290_easy_mode = 0x01;
 120                 mode = "MN";
 121         } else if (params->std & V4L2_STD_B) {
 122                 priv->tda8290_easy_mode = 0x02;
 123                 mode = "B";
 124         } else if (params->std & V4L2_STD_GH) {
 125                 priv->tda8290_easy_mode = 0x04;
 126                 mode = "GH";
 127         } else if (params->std & V4L2_STD_PAL_I) {
 128                 priv->tda8290_easy_mode = 0x08;
 129                 mode = "I";
 130         } else if (params->std & V4L2_STD_DK) {
 131                 priv->tda8290_easy_mode = 0x10;
 132                 mode = "DK";
 133         } else if (params->std & V4L2_STD_SECAM_L) {
 134                 priv->tda8290_easy_mode = 0x20;
 135                 mode = "L";
 136         } else if (params->std & V4L2_STD_SECAM_LC) {
 137                 priv->tda8290_easy_mode = 0x40;
 138                 mode = "LC";
 139         } else {
 140                 priv->tda8290_easy_mode = 0x10;
 141                 mode = "xx";
 142         }
 143
 144         tuner_dbg("setting tda829x to system %s\n", mode);
 145 }
 146
 147 static void tda8290_set_params(struct dvb_frontend *fe,
 148                                struct analog_parameters *params)
 149 {
 150         struct tda8290_priv *priv = fe->analog_demod_priv;
 151
 152         unsigned char soft_reset[]  = { 0x00, 0x00 };
 153         unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 154         unsigned char expert_mode[] = { 0x01, 0x80 };
 155         unsigned char agc_out_on[]  = { 0x02, 0x00 };
 156         unsigned char gainset_off[] = { 0x28, 0x14 };
 157         unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 158         unsigned char adc_head_6[]  = { 0x05, 0x04 };
 159         unsigned char adc_head_9[]  = { 0x05, 0x02 };
 160         unsigned char adc_head_12[] = { 0x05, 0x01 };
 161         unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 162         unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 163         unsigned char gainset_2[]   = { 0x28, 0x64 };
 164         unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 165         unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 166         unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 167         unsigned char addr_adc_sat  = 0x1a;
 168         unsigned char addr_agc_stat = 0x1d;
 169         unsigned char addr_pll_stat = 0x1b;
 170         unsigned char adc_sat, agc_stat,
 171                       pll_stat;
 172         int i;
 173
 174         set_audio(fe, params);
 175
 176         if (priv->cfg.config)
 177                 tuner_dbg("tda827xa config is 0x%02x\n", *priv->cfg.config);
 178         tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 179         tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 180         tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 181         msleep(1);
 182
 183         expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 184         tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 185         tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 186         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 187         if (priv->tda8290_easy_mode & 0x60)
 188                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 189         else
 190                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 191         tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 192
 193         tda8290_i2c_bridge(fe, 1);
 194
 195         if (fe->ops.tuner_ops.set_analog_params)
 196                 fe->ops.tuner_ops.set_analog_params(fe, params);
 197
 198         for (i = 0; i < 3; i++) {
 199                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 200                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 201                 if (pll_stat & 0x80) {
 202                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 203                         tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 204                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 205                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 206                         tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 207                         break;
 208                 } else {
 209                         tuner_dbg("tda8290 not locked, no signal?\n");
 210                         msleep(100);
 211                 }
 212         }
 213         /* adjust headroom resp. gain */
 214         if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 215                 tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 216                            agc_stat, adc_sat, pll_stat & 0x80);
 217                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 218                 msleep(100);
 219                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 220                 tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 221                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 222                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 223                 if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 224                         tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 225                                    agc_stat, pll_stat & 0x80);
 226                         if (priv->cfg.agcf)
 227                                 priv->cfg.agcf(fe);
 228                         msleep(100);
 229                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 230                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 231                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 232                         tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 233                         if((agc_stat > 115) || !(pll_stat & 0x80)) {
 234                                 tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 235                                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 236                                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 237                                 msleep(100);
 238                         }
 239                 }
 240         }
 241
 242         /* l/ l' deadlock? */
 243         if(priv->tda8290_easy_mode & 0x60) {
 244                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 245                 tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 246                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 247                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 248                 if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 249                         tuner_dbg("trying to resolve SECAM L deadlock\n");
 250                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 251                         msleep(40);
 252                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 253                 }
 254         }
 255
 256         tda8290_i2c_bridge(fe, 0);
 257         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
 258 }
 259
 260 /*---------------------------------------------------------------------*/
 261
 262 static void tda8295_power(struct dvb_frontend *fe, int enable)
 263 {
 264         struct tda8290_priv *priv = fe->analog_demod_priv;
 265         unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */
 266
 267         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 268         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 269
 270         if (enable)
 271                 buf[1] = 0x01;
 272         else
 273                 buf[1] = 0x03;
 274
 275         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 276 }
 277
 278 static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
 279 {
 280         struct tda8290_priv *priv = fe->analog_demod_priv;
 281         unsigned char buf[] = { 0x01, 0x00 };
 282
 283         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 284         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 285
 286         if (enable)
 287                 buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
 288         else
 289                 buf[1] = 0x00; /* reset active bit */
 290
 291         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 292 }
 293
 294 static void tda8295_set_video_std(struct dvb_frontend *fe)
 295 {
 296         struct tda8290_priv *priv = fe->analog_demod_priv;
 297         unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
 298
 299         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 300
 301         tda8295_set_easy_mode(fe, 1);
 302         msleep(20);
 303         tda8295_set_easy_mode(fe, 0);
 304 }
 305
 306 /*---------------------------------------------------------------------*/
 307
 308 static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
 309 {
 310         struct tda8290_priv *priv = fe->analog_demod_priv;
 311         unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
 312
 313         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 314         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 315
 316         if (enable)
 317                 buf[1] &= ~0x40;
 318         else
 319                 buf[1] |= 0x40;
 320
 321         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 322 }
 323
 324 static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
 325 {
 326         struct tda8290_priv *priv = fe->analog_demod_priv;
 327         unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
 328         unsigned char set_gpio_val[]   = { 0x46, 0x00 };
 329
 330         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_cf[0], 1);
 331         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_cf[1], 1);
 332         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_val[0], 1);
 333         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_val[1], 1);
 334
 335         set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
 336
 337         if (enable) {
 338                 set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
 339                 set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
 340         }
 341         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
 342         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
 343 }
 344
 345 static int tda8295_has_signal(struct dvb_frontend *fe)
 346 {
 347         struct tda8290_priv *priv = fe->analog_demod_priv;
 348
 349         unsigned char hvpll_stat = 0x26;
 350         unsigned char ret;
 351
 352         tuner_i2c_xfer_send(&priv->i2c_props, &hvpll_stat, 1);
 353         tuner_i2c_xfer_recv(&priv->i2c_props, &ret, 1);
 354         return (ret & 0x01) ? 65535 : 0;
 355 }
 356
 357 /*---------------------------------------------------------------------*/
 358
 359 static void tda8295_set_params(struct dvb_frontend *fe,
 360                                struct analog_parameters *params)
 361 {
 362         struct tda8290_priv *priv = fe->analog_demod_priv;
 363
 364         unsigned char blanking_mode[]     = { 0x1d, 0x00 };
 365
 366         set_audio(fe, params);
 367
 368         tuner_dbg("%s: freq = %d\n", __FUNCTION__, params->frequency);
 369
 370         tda8295_power(fe, 1);
 371         tda8295_agc1_out(fe, 1);
 372
 373         tuner_i2c_xfer_send(&priv->i2c_props, &blanking_mode[0], 1);
 374         tuner_i2c_xfer_recv(&priv->i2c_props, &blanking_mode[1], 1);
 375
 376         tda8295_set_video_std(fe);
 377
 378         blanking_mode[1] = 0x03;
 379         tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
 380         msleep(20);
 381
 382         tda8295_i2c_bridge(fe, 1);
 383
 384         if (fe->ops.tuner_ops.set_analog_params)
 385                 fe->ops.tuner_ops.set_analog_params(fe, params);
 386
 387         if (priv->cfg.agcf)
 388                 priv->cfg.agcf(fe);
 389
 390         if (tda8295_has_signal(fe))
 391                 tuner_dbg("tda8295 is locked\n");
 392         else
 393                 tuner_dbg("tda8295 not locked, no signal?\n");
 394
 395         tda8295_i2c_bridge(fe, 0);
 396 }
 397
 398 /*---------------------------------------------------------------------*/
 399
 400 static int tda8290_has_signal(struct dvb_frontend *fe)
 401 {
 402         struct tda8290_priv *priv = fe->analog_demod_priv;
 403
 404         unsigned char i2c_get_afc[1] = { 0x1B };
 405         unsigned char afc = 0;
 406
 407         tuner_i2c_xfer_send(&priv->i2c_props, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 408         tuner_i2c_xfer_recv(&priv->i2c_props, &afc, 1);
 409         return (afc & 0x80)? 65535:0;
 410 }
 411
 412 /*---------------------------------------------------------------------*/
 413
 414 static void tda8290_standby(struct dvb_frontend *fe)
 415 {
 416         struct tda8290_priv *priv = fe->analog_demod_priv;
 417
 418         unsigned char cb1[] = { 0x30, 0xD0 };
 419         unsigned char tda8290_standby[] = { 0x00, 0x02 };
 420         unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 421         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 422
 423         tda8290_i2c_bridge(fe, 1);
 424         if (priv->ver & TDA8275A)
 425                 cb1[1] = 0x90;
 426         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 427         tda8290_i2c_bridge(fe, 0);
 428         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
 429         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
 430 }
 431
 432 static void tda8295_standby(struct dvb_frontend *fe)
 433 {
 434         tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */
 435
 436         tda8295_power(fe, 0);
 437 }
 438
 439 static void tda8290_init_if(struct dvb_frontend *fe)
 440 {
 441         struct tda8290_priv *priv = fe->analog_demod_priv;
 442
 443         unsigned char set_VS[] = { 0x30, 0x6F };
 444         unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 445         unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 446
 447         if ((priv->cfg.config) &&
 448             ((*priv->cfg.config == 1) || (*priv->cfg.config == 2)))
 449                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 450         else
 451                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 452         tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 453 }
 454
 455 static void tda8295_init_if(struct dvb_frontend *fe)
 456 {
 457         struct tda8290_priv *priv = fe->analog_demod_priv;
 458
 459         static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
 460         static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
 461         static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
 462         static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
 463         static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
 464         static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
 465         static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
 466
 467         tda8295_power(fe, 1);
 468
 469         tda8295_set_easy_mode(fe, 0);
 470         tda8295_set_video_std(fe);
 471
 472         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
 473         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
 474         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
 475         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
 476         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
 477         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
 478         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
 479
 480         tda8295_agc1_out(fe, 0);
 481         tda8295_agc2_out(fe, 0);
 482 }
 483
 484 static void tda8290_init_tuner(struct dvb_frontend *fe)
 485 {
 486         struct tda8290_priv *priv = fe->analog_demod_priv;
 487         unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 488                                           0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 489         unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 490                                           0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 491         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 492                               .buf=tda8275_init, .len = 14};
 493         if (priv->ver & TDA8275A)
 494                 msg.buf = tda8275a_init;
 495
 496         tda8290_i2c_bridge(fe, 1);
 497         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 498         tda8290_i2c_bridge(fe, 0);
 499 }
 500
 501 /*---------------------------------------------------------------------*/
 502
 503 static void tda829x_release(struct dvb_frontend *fe)
 504 {
 505         if (fe->ops.tuner_ops.release)
 506                 fe->ops.tuner_ops.release(fe);
 507
 508         kfree(fe->analog_demod_priv);
 509         fe->analog_demod_priv = NULL;
 510 }
 511
 512 static int tda829x_find_tuner(struct dvb_frontend *fe)
 513 {
 514         struct tda8290_priv *priv = fe->analog_demod_priv;
 515         struct analog_tuner_ops *ops = fe->ops.analog_demod_ops;
 516         int i, ret, tuners_found;
 517         u32 tuner_addrs;
 518         u8 data;
 519         struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
 520
 521         if (NULL == ops)
 522                 return -EINVAL;
 523
 524         ops->i2c_gate_ctrl(fe, 1);
 525
 526         /* probe for tuner chip */
 527         tuners_found = 0;
 528         tuner_addrs = 0;
 529         for (i = 0x60; i <= 0x63; i++) {
 530                 msg.addr = i;
 531                 ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 532                 if (ret == 1) {
 533                         tuners_found++;
 534                         tuner_addrs = (tuner_addrs << 8) + i;
 535                 }
 536         }
 537         /* if there is more than one tuner, we expect the right one is
 538            behind the bridge and we choose the highest address that doesn't
 539            give a response now
 540          */
 541
 542         ops->i2c_gate_ctrl(fe, 0);
 543
 544         if (tuners_found > 1)
 545                 for (i = 0; i < tuners_found; i++) {
 546                         msg.addr = tuner_addrs  & 0xff;
 547                         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 548                         if (ret == 1)
 549                                 tuner_addrs = tuner_addrs >> 8;
 550                         else
 551                                 break;
 552                 }
 553
 554         if (tuner_addrs == 0) {
 555                 tuner_addrs = 0x60;
 556                 tuner_info("could not clearly identify tuner address, "
 557                            "defaulting to %x\n", tuner_addrs);
 558         } else {
 559                 tuner_addrs = tuner_addrs & 0xff;
 560                 tuner_info("setting tuner address to %x\n", tuner_addrs);
 561         }
 562         priv->tda827x_addr = tuner_addrs;
 563         msg.addr = tuner_addrs;
 564
 565         ops->i2c_gate_ctrl(fe, 1);
 566         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 567
 568         if (ret != 1) {
 569                 tuner_warn("tuner access failed!\n");
 570                 return -EREMOTEIO;
 571         }
 572
 573         if (data == 0x83) {
 574                 priv->ver |= TDA18271;
 575                 tda18271_attach(fe, priv->tda827x_addr,
 576                                 priv->i2c_props.adap,
 577                                 TDA18271_GATE_ANALOG);
 578         } else {
 579                 if ((data & 0x3c) == 0)
 580                         priv->ver |= TDA8275;
 581                 else
 582                         priv->ver |= TDA8275A;
 583
 584                 tda827x_attach(fe, priv->tda827x_addr,
 585                                priv->i2c_props.adap, &priv->cfg);
 586         }
 587         if (fe->ops.tuner_ops.init)
 588                 fe->ops.tuner_ops.init(fe);
 589
 590         if (fe->ops.tuner_ops.sleep)
 591                 fe->ops.tuner_ops.sleep(fe);
 592
 593         ops->i2c_gate_ctrl(fe, 0);
 594
 595         return 0;
 596 }
 597
 598 static int tda8290_probe(struct tuner_i2c_props *i2c_props)
 599 {
 600 #define TDA8290_ID 0x89
 601         unsigned char tda8290_id[] = { 0x1f, 0x00 };
 602
 603         /* detect tda8290 */
 604         tuner_i2c_xfer_send(i2c_props, &tda8290_id[0], 1);
 605         tuner_i2c_xfer_recv(i2c_props, &tda8290_id[1], 1);
 606
 607         if (tda8290_id[1] == TDA8290_ID) {
 608                 if (debug)
 609                         printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
 610                                __FUNCTION__, i2c_adapter_id(i2c_props->adap),
 611                                i2c_props->addr);
 612                 return 0;
 613         }
 614
 615         return -ENODEV;
 616 }
 617
 618 static int tda8295_probe(struct tuner_i2c_props *i2c_props)
 619 {
 620 #define TDA8295_ID 0x8a
 621         unsigned char tda8295_id[] = { 0x2f, 0x00 };
 622
 623         /* detect tda8295 */
 624         tuner_i2c_xfer_send(i2c_props, &tda8295_id[0], 1);
 625         tuner_i2c_xfer_recv(i2c_props, &tda8295_id[1], 1);
 626
 627         if (tda8295_id[1] == TDA8295_ID) {
 628                 if (debug)
 629                         printk(KERN_DEBUG "%s: tda8295 detected @ %d-%04x\n",
 630                                __FUNCTION__, i2c_adapter_id(i2c_props->adap),
 631                                i2c_props->addr);
 632                 return 0;
 633         }
 634
 635         return -ENODEV;
 636 }
 637
 638 static struct analog_tuner_ops tda8290_tuner_ops = {
 639         .info           = {
 640                 .name   = "TDA8290",
 641         },
 642         .set_params     = tda8290_set_params,
 643         .has_signal     = tda8290_has_signal,
 644         .standby        = tda8290_standby,
 645         .release        = tda829x_release,
 646         .i2c_gate_ctrl  = tda8290_i2c_bridge,
 647 };
 648
 649 static struct analog_tuner_ops tda8295_tuner_ops = {
 650         .info           = {
 651                 .name   = "TDA8295",
 652         },
 653         .set_params     = tda8295_set_params,
 654         .has_signal     = tda8295_has_signal,
 655         .standby        = tda8295_standby,
 656         .release        = tda829x_release,
 657         .i2c_gate_ctrl  = tda8295_i2c_bridge,
 658 };
 659
 660 struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
 661                                     struct i2c_adapter *i2c_adap, u8 i2c_addr,
 662                                     struct tda829x_config *cfg)
 663 {
 664         struct tda8290_priv *priv = NULL;
 665         char *name;
 666
 667         priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 668         if (priv == NULL)
 669                 return NULL;
 670         fe->analog_demod_priv = priv;
 671
 672         priv->i2c_props.addr     = i2c_addr;
 673         priv->i2c_props.adap     = i2c_adap;
 674         if (cfg) {
 675                 priv->cfg.config         = cfg->lna_cfg;
 676                 priv->cfg.tuner_callback = cfg->tuner_callback;
 677         }
 678
 679         if (tda8290_probe(&priv->i2c_props) == 0) {
 680                 priv->ver = TDA8290;
 681                 fe->ops.analog_demod_ops = &tda8290_tuner_ops;
 682         }
 683
 684         if (tda8295_probe(&priv->i2c_props) == 0) {
 685                 priv->ver = TDA8295;
 686                 fe->ops.analog_demod_ops = &tda8295_tuner_ops;
 687         }
 688
 689         if (tda829x_find_tuner(fe) < 0)
 690                 goto fail;
 691
 692         switch (priv->ver) {
 693         case TDA8290 | TDA8275:
 694                 name = "tda8290+75";
 695                 break;
 696         case TDA8295 | TDA8275:
 697                 name = "tda8295+75";
 698                 break;
 699         case TDA8290 | TDA8275A:
 700                 name = "tda8290+75a";
 701                 break;
 702         case TDA8295 | TDA8275A:
 703                 name = "tda8295+75a";
 704                 break;
 705         case TDA8290 | TDA18271:
 706                 name = "tda8290+18271";
 707                 break;
 708         case TDA8295 | TDA18271:
 709                 name = "tda8295+18271";
 710                 break;
 711         default:
 712                 goto fail;
 713         }
 714         tuner_info("type set to %s\n", name);
 715
 716         if (priv->ver & TDA8290) {
 717                 tda8290_init_tuner(fe);
 718                 tda8290_init_if(fe);
 719         } else if (priv->ver & TDA8295)
 720                 tda8295_init_if(fe);
 721
 722         return fe;
 723
 724 fail:
 725         tda829x_release(fe);
 726         fe->ops.analog_demod_ops = NULL;
 727         return NULL;
 728 }
 729 EXPORT_SYMBOL_GPL(tda829x_attach);
 730
 731 int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
 732 {
 733         struct tuner_i2c_props i2c_props = {
 734                 .adap = i2c_adap,
 735                 .addr = i2c_addr,
 736         };
 737
 738         unsigned char soft_reset[]   = { 0x00, 0x00 };
 739         unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 740         unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 741         unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 742         unsigned char addr_dto_lsb = 0x07;
 743         unsigned char data;
 744 #define PROBE_BUFFER_SIZE 8
 745         unsigned char buf[PROBE_BUFFER_SIZE];
 746         int i;
 747
 748         /* rule out tda9887, which would return the same byte repeatedly */
 749         tuner_i2c_xfer_send(&i2c_props, soft_reset, 1);
 750         tuner_i2c_xfer_recv(&i2c_props, buf, PROBE_BUFFER_SIZE);
 751         for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
 752                 if (buf[i] != buf[0])
 753                         break;
 754         }
 755
 756         /* all bytes are equal, not a tda829x - probably a tda9887 */
 757         if (i == PROBE_BUFFER_SIZE)
 758                 return -ENODEV;
 759
 760         if ((tda8290_probe(&i2c_props) == 0) ||
 761             (tda8295_probe(&i2c_props) == 0))
 762                 return 0;
 763
 764         /* fall back to old probing method */
 765         tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 766         tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 767         tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 768         tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 769         if (data == 0) {
 770                 tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 771                 tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 772                 tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 773                 tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 774                 if (data == 0x7b) {
 775                         return 0;
 776                 }
 777         }
 778         tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 779         return -ENODEV;
 780 }
 781 EXPORT_SYMBOL_GPL(tda829x_probe);
 782
 783 MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 784 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
 785 MODULE_LICENSE("GPL");
 786
 787 /*
 788  * Overrides for Emacs so that we follow Linus's tabbing style.
 789  * ---------------------------------------------------------------------------
 790  * Local variables:
 791  * c-basic-offset: 8
 792  * End:
 793  */