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 "tda8290.h"
  27 #include "tda827x.h"
  28 #include "tda18271.h"
  29
  30 static int tuner_debug;
  31 module_param_named(debug, tuner_debug, int, 0644);
  32 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  33
  34 #define PREFIX "tda8290"
  35
  36 /* ---------------------------------------------------------------------- */
  37
  38 struct tda8290_priv {
  39         struct tuner_i2c_props i2c_props;
  40
  41         unsigned char tda8290_easy_mode;
  42
  43         unsigned char tda827x_addr;
  44
  45         unsigned char ver;
  46 #define TDA8290   1
  47 #define TDA8295   2
  48 #define TDA8275   4
  49 #define TDA8275A  8
  50 #define TDA18271 16
  51
  52         struct tda827x_config cfg;
  53
  54         struct tuner *t;
  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 {
 115         struct tda8290_priv *priv = fe->analog_demod_priv;
 116         struct tuner *t = priv->t;
 117         char* mode;
 118
 119         if (t->std & V4L2_STD_MN) {
 120                 priv->tda8290_easy_mode = 0x01;
 121                 mode = "MN";
 122         } else if (t->std & V4L2_STD_B) {
 123                 priv->tda8290_easy_mode = 0x02;
 124                 mode = "B";
 125         } else if (t->std & V4L2_STD_GH) {
 126                 priv->tda8290_easy_mode = 0x04;
 127                 mode = "GH";
 128         } else if (t->std & V4L2_STD_PAL_I) {
 129                 priv->tda8290_easy_mode = 0x08;
 130                 mode = "I";
 131         } else if (t->std & V4L2_STD_DK) {
 132                 priv->tda8290_easy_mode = 0x10;
 133                 mode = "DK";
 134         } else if (t->std & V4L2_STD_SECAM_L) {
 135                 priv->tda8290_easy_mode = 0x20;
 136                 mode = "L";
 137         } else if (t->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         tuner_dbg("setting tda829x to system %s\n", mode);
 146 }
 147
 148 static void tda8290_set_freq(struct dvb_frontend *fe, unsigned int freq)
 149 {
 150         struct tda8290_priv *priv = fe->analog_demod_priv;
 151         struct tuner *t = priv->t;
 152
 153         unsigned char soft_reset[]  = { 0x00, 0x00 };
 154         unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 155         unsigned char expert_mode[] = { 0x01, 0x80 };
 156         unsigned char agc_out_on[]  = { 0x02, 0x00 };
 157         unsigned char gainset_off[] = { 0x28, 0x14 };
 158         unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 159         unsigned char adc_head_6[]  = { 0x05, 0x04 };
 160         unsigned char adc_head_9[]  = { 0x05, 0x02 };
 161         unsigned char adc_head_12[] = { 0x05, 0x01 };
 162         unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 163         unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 164         unsigned char gainset_2[]   = { 0x28, 0x64 };
 165         unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 166         unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 167         unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 168         unsigned char addr_adc_sat  = 0x1a;
 169         unsigned char addr_agc_stat = 0x1d;
 170         unsigned char addr_pll_stat = 0x1b;
 171         unsigned char adc_sat, agc_stat,
 172                       pll_stat;
 173         int i;
 174
 175         struct analog_parameters params = {
 176                 .frequency = freq,
 177                 .mode      = t->mode,
 178                 .audmode   = t->audmode,
 179                 .std       = t->std
 180         };
 181
 182         set_audio(fe);
 183
 184         tuner_dbg("tda827xa config is 0x%02x\n", t->config);
 185         tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 186         tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 187         tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 188         msleep(1);
 189
 190         expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 191         tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 192         tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 193         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 194         if (priv->tda8290_easy_mode & 0x60)
 195                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 196         else
 197                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 198         tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 199
 200         tda8290_i2c_bridge(fe, 1);
 201
 202         if (fe->ops.tuner_ops.set_analog_params)
 203                 fe->ops.tuner_ops.set_analog_params(fe, &params);
 204
 205         for (i = 0; i < 3; i++) {
 206                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 207                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 208                 if (pll_stat & 0x80) {
 209                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 210                         tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 211                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 212                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 213                         tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 214                         break;
 215                 } else {
 216                         tuner_dbg("tda8290 not locked, no signal?\n");
 217                         msleep(100);
 218                 }
 219         }
 220         /* adjust headroom resp. gain */
 221         if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 222                 tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 223                            agc_stat, adc_sat, pll_stat & 0x80);
 224                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 225                 msleep(100);
 226                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 227                 tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 228                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 229                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 230                 if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 231                         tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 232                                    agc_stat, pll_stat & 0x80);
 233                         if (priv->cfg.agcf)
 234                                 priv->cfg.agcf(fe);
 235                         msleep(100);
 236                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 237                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 238                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 239                         tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 240                         if((agc_stat > 115) || !(pll_stat & 0x80)) {
 241                                 tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 242                                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 243                                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 244                                 msleep(100);
 245                         }
 246                 }
 247         }
 248
 249         /* l/ l' deadlock? */
 250         if(priv->tda8290_easy_mode & 0x60) {
 251                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 252                 tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 253                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 254                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 255                 if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 256                         tuner_dbg("trying to resolve SECAM L deadlock\n");
 257                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 258                         msleep(40);
 259                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 260                 }
 261         }
 262
 263         tda8290_i2c_bridge(fe, 0);
 264         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
 265 }
 266
 267 /*---------------------------------------------------------------------*/
 268
 269 static void tda8295_power(struct dvb_frontend *fe, int enable)
 270 {
 271         struct tda8290_priv *priv = fe->analog_demod_priv;
 272         unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */
 273
 274         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 275         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 276
 277         if (enable)
 278                 buf[1] = 0x01;
 279         else
 280                 buf[1] = 0x03;
 281
 282         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 283 }
 284
 285 static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
 286 {
 287         struct tda8290_priv *priv = fe->analog_demod_priv;
 288         unsigned char buf[] = { 0x01, 0x00 };
 289
 290         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 291         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 292
 293         if (enable)
 294                 buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
 295         else
 296                 buf[1] = 0x00; /* reset active bit */
 297
 298         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 299 }
 300
 301 static void tda8295_set_video_std(struct dvb_frontend *fe)
 302 {
 303         struct tda8290_priv *priv = fe->analog_demod_priv;
 304         unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
 305
 306         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 307
 308         tda8295_set_easy_mode(fe, 1);
 309         msleep(20);
 310         tda8295_set_easy_mode(fe, 0);
 311 }
 312
 313 /*---------------------------------------------------------------------*/
 314
 315 static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
 316 {
 317         struct tda8290_priv *priv = fe->analog_demod_priv;
 318         unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
 319
 320         tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 321         tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 322
 323         if (enable)
 324                 buf[1] &= ~0x40;
 325         else
 326                 buf[1] |= 0x40;
 327
 328         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 329 }
 330
 331 static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
 332 {
 333         struct tda8290_priv *priv = fe->analog_demod_priv;
 334         unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
 335         unsigned char set_gpio_val[]   = { 0x46, 0x00 };
 336
 337         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_cf[0], 1);
 338         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_cf[1], 1);
 339         tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_val[0], 1);
 340         tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_val[1], 1);
 341
 342         set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
 343
 344         if (enable) {
 345                 set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
 346                 set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
 347         }
 348         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
 349         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
 350 }
 351
 352 static int tda8295_has_signal(struct dvb_frontend *fe)
 353 {
 354         struct tda8290_priv *priv = fe->analog_demod_priv;
 355
 356         unsigned char hvpll_stat = 0x26;
 357         unsigned char ret;
 358
 359         tuner_i2c_xfer_send(&priv->i2c_props, &hvpll_stat, 1);
 360         tuner_i2c_xfer_recv(&priv->i2c_props, &ret, 1);
 361         return (ret & 0x01) ? 65535 : 0;
 362 }
 363
 364 /*---------------------------------------------------------------------*/
 365
 366 static void tda8295_set_freq(struct dvb_frontend *fe, unsigned int freq)
 367 {
 368         struct tda8290_priv *priv = fe->analog_demod_priv;
 369         struct tuner *t = priv->t;
 370
 371         unsigned char blanking_mode[]     = { 0x1d, 0x00 };
 372
 373         struct analog_parameters params = {
 374                 .frequency = freq,
 375                 .mode      = t->mode,
 376                 .audmode   = t->audmode,
 377                 .std       = t->std
 378         };
 379
 380         set_audio(fe);
 381
 382         tuner_dbg("%s: freq = %d\n", __FUNCTION__, freq);
 383
 384         tda8295_power(fe, 1);
 385         tda8295_agc1_out(fe, 1);
 386
 387         tuner_i2c_xfer_send(&priv->i2c_props, &blanking_mode[0], 1);
 388         tuner_i2c_xfer_recv(&priv->i2c_props, &blanking_mode[1], 1);
 389
 390         tda8295_set_video_std(fe);
 391
 392         blanking_mode[1] = 0x03;
 393         tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
 394         msleep(20);
 395
 396         tda8295_i2c_bridge(fe, 1);
 397
 398         if (fe->ops.tuner_ops.set_analog_params)
 399                 fe->ops.tuner_ops.set_analog_params(fe, &params);
 400
 401         if (priv->cfg.agcf)
 402                 priv->cfg.agcf(fe);
 403
 404         if (tda8295_has_signal(fe))
 405                 tuner_dbg("tda8295 is locked\n");
 406         else
 407                 tuner_dbg("tda8295 not locked, no signal?\n");
 408
 409         tda8295_i2c_bridge(fe, 0);
 410 }
 411
 412 /*---------------------------------------------------------------------*/
 413
 414 static int tda8290_has_signal(struct dvb_frontend *fe)
 415 {
 416         struct tda8290_priv *priv = fe->analog_demod_priv;
 417
 418         unsigned char i2c_get_afc[1] = { 0x1B };
 419         unsigned char afc = 0;
 420
 421         tuner_i2c_xfer_send(&priv->i2c_props, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 422         tuner_i2c_xfer_recv(&priv->i2c_props, &afc, 1);
 423         return (afc & 0x80)? 65535:0;
 424 }
 425
 426 /*---------------------------------------------------------------------*/
 427
 428 static void tda8290_standby(struct dvb_frontend *fe)
 429 {
 430         struct tda8290_priv *priv = fe->analog_demod_priv;
 431
 432         unsigned char cb1[] = { 0x30, 0xD0 };
 433         unsigned char tda8290_standby[] = { 0x00, 0x02 };
 434         unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 435         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 436
 437         tda8290_i2c_bridge(fe, 1);
 438         if (priv->ver & TDA8275A)
 439                 cb1[1] = 0x90;
 440         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 441         tda8290_i2c_bridge(fe, 0);
 442         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
 443         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
 444 }
 445
 446 static void tda8295_standby(struct dvb_frontend *fe)
 447 {
 448         tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */
 449
 450         tda8295_power(fe, 0);
 451 }
 452
 453 static void tda8290_init_if(struct dvb_frontend *fe)
 454 {
 455         struct tda8290_priv *priv = fe->analog_demod_priv;
 456         struct tuner *t = priv->t;
 457
 458         unsigned char set_VS[] = { 0x30, 0x6F };
 459         unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 460         unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 461
 462         if ((t->config == 1) || (t->config == 2))
 463                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 464         else
 465                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 466         tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 467 }
 468
 469 static void tda8295_init_if(struct dvb_frontend *fe)
 470 {
 471         struct tda8290_priv *priv = fe->analog_demod_priv;
 472
 473         static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
 474         static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
 475         static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
 476         static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
 477         static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
 478         static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
 479         static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
 480
 481         tda8295_power(fe, 1);
 482
 483         tda8295_set_easy_mode(fe, 0);
 484         tda8295_set_video_std(fe);
 485
 486         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
 487         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
 488         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
 489         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
 490         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
 491         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
 492         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
 493
 494         tda8295_agc1_out(fe, 0);
 495         tda8295_agc2_out(fe, 0);
 496 }
 497
 498 static void tda8290_init_tuner(struct dvb_frontend *fe)
 499 {
 500         struct tda8290_priv *priv = fe->analog_demod_priv;
 501         unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 502                                           0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 503         unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 504                                           0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 505         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 506                               .buf=tda8275_init, .len = 14};
 507         if (priv->ver & TDA8275A)
 508                 msg.buf = tda8275a_init;
 509
 510         tda8290_i2c_bridge(fe, 1);
 511         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 512         tda8290_i2c_bridge(fe, 0);
 513 }
 514
 515 /*---------------------------------------------------------------------*/
 516
 517 static void tda829x_release(struct dvb_frontend *fe)
 518 {
 519         if (fe->ops.tuner_ops.release)
 520                 fe->ops.tuner_ops.release(fe);
 521
 522         kfree(fe->analog_demod_priv);
 523         fe->analog_demod_priv = NULL;
 524 }
 525
 526 static int tda829x_find_tuner(struct dvb_frontend *fe)
 527 {
 528         struct tda8290_priv *priv = fe->analog_demod_priv;
 529         struct analog_tuner_ops *ops = fe->ops.analog_demod_ops;
 530         struct tuner *t = priv->t;
 531         int i, ret, tuners_found;
 532         u32 tuner_addrs;
 533         u8 data;
 534         struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
 535
 536         if (NULL == ops)
 537                 return -EINVAL;
 538
 539         ops->i2c_gate_ctrl(fe, 1);
 540
 541         /* probe for tuner chip */
 542         tuners_found = 0;
 543         tuner_addrs = 0;
 544         for (i = 0x60; i <= 0x63; i++) {
 545                 msg.addr = i;
 546                 ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 547                 if (ret == 1) {
 548                         tuners_found++;
 549                         tuner_addrs = (tuner_addrs << 8) + i;
 550                 }
 551         }
 552         /* if there is more than one tuner, we expect the right one is
 553            behind the bridge and we choose the highest address that doesn't
 554            give a response now
 555          */
 556
 557         ops->i2c_gate_ctrl(fe, 0);
 558
 559         if (tuners_found > 1)
 560                 for (i = 0; i < tuners_found; i++) {
 561                         msg.addr = tuner_addrs  & 0xff;
 562                         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 563                         if (ret == 1)
 564                                 tuner_addrs = tuner_addrs >> 8;
 565                         else
 566                                 break;
 567                 }
 568
 569         if (tuner_addrs == 0) {
 570                 tuner_addrs = 0x60;
 571                 tuner_info("could not clearly identify tuner address, "
 572                            "defaulting to %x\n", tuner_addrs);
 573         } else {
 574                 tuner_addrs = tuner_addrs & 0xff;
 575                 tuner_info("setting tuner address to %x\n", tuner_addrs);
 576         }
 577         priv->tda827x_addr = tuner_addrs;
 578         msg.addr = tuner_addrs;
 579
 580         ops->i2c_gate_ctrl(fe, 1);
 581         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 582
 583         if (ret != 1) {
 584                 tuner_warn("tuner access failed!\n");
 585                 return -EREMOTEIO;
 586         }
 587
 588         if (data == 0x83) {
 589                 priv->ver |= TDA18271;
 590                 tda18271_attach(&t->fe, priv->tda827x_addr,
 591                                 priv->i2c_props.adap);
 592         } else {
 593                 if ((data & 0x3c) == 0)
 594                         priv->ver |= TDA8275;
 595                 else
 596                         priv->ver |= TDA8275A;
 597
 598                 tda827x_attach(&t->fe, priv->tda827x_addr,
 599                                priv->i2c_props.adap, &priv->cfg);
 600         }
 601         if (t->fe.ops.tuner_ops.init)
 602                 t->fe.ops.tuner_ops.init(&t->fe);
 603
 604         if (t->fe.ops.tuner_ops.sleep)
 605                 t->fe.ops.tuner_ops.sleep(&t->fe);
 606
 607         ops->i2c_gate_ctrl(fe, 0);
 608
 609         switch (priv->ver) {
 610         case TDA8290 | TDA8275:
 611                 strlcpy(t->i2c->name, "tda8290+75", sizeof(t->i2c->name));
 612                 break;
 613         case TDA8295 | TDA8275:
 614                 strlcpy(t->i2c->name, "tda8295+75", sizeof(t->i2c->name));
 615                 break;
 616         case TDA8290 | TDA8275A:
 617                 strlcpy(t->i2c->name, "tda8290+75a", sizeof(t->i2c->name));
 618                 break;
 619         case TDA8295 | TDA8275A:
 620                 strlcpy(t->i2c->name, "tda8295+75a", sizeof(t->i2c->name));
 621                 break;
 622         case TDA8290 | TDA18271:
 623                 strlcpy(t->i2c->name, "tda8290+18271", sizeof(t->i2c->name));
 624                 break;
 625         case TDA8295 | TDA18271:
 626                 strlcpy(t->i2c->name, "tda8295+18271", sizeof(t->i2c->name));
 627                 break;
 628         default:
 629                 return -EINVAL;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int tda8290_probe(struct tuner_i2c_props *i2c_props)
 636 {
 637 #define TDA8290_ID 0x89
 638         unsigned char tda8290_id[] = { 0x1f, 0x00 };
 639
 640         /* detect tda8290 */
 641         tuner_i2c_xfer_send(i2c_props, &tda8290_id[0], 1);
 642         tuner_i2c_xfer_recv(i2c_props, &tda8290_id[1], 1);
 643
 644         if (tda8290_id[1] == TDA8290_ID) {
 645                 if (tuner_debug)
 646                         printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
 647                                __FUNCTION__, i2c_adapter_id(i2c_props->adap),
 648                                i2c_props->addr);
 649                 return 0;
 650         }
 651
 652         return -ENODEV;
 653 }
 654
 655 static int tda8295_probe(struct tuner_i2c_props *i2c_props)
 656 {
 657 #define TDA8295_ID 0x8a
 658         unsigned char tda8295_id[] = { 0x2f, 0x00 };
 659
 660         /* detect tda8295 */
 661         tuner_i2c_xfer_send(i2c_props, &tda8295_id[0], 1);
 662         tuner_i2c_xfer_recv(i2c_props, &tda8295_id[1], 1);
 663
 664         if (tda8295_id[1] == TDA8295_ID) {
 665                 if (tuner_debug)
 666                         printk(KERN_DEBUG "%s: tda8295 detected @ %d-%04x\n",
 667                                __FUNCTION__, i2c_adapter_id(i2c_props->adap),
 668                                i2c_props->addr);
 669                 return 0;
 670         }
 671
 672         return -ENODEV;
 673 }
 674
 675 static struct analog_tuner_ops tda8290_tuner_ops = {
 676         .set_tv_freq    = tda8290_set_freq,
 677         .set_radio_freq = tda8290_set_freq,
 678         .has_signal     = tda8290_has_signal,
 679         .standby        = tda8290_standby,
 680         .release        = tda829x_release,
 681         .i2c_gate_ctrl  = tda8290_i2c_bridge,
 682 };
 683
 684 static struct analog_tuner_ops tda8295_tuner_ops = {
 685         .set_tv_freq    = tda8295_set_freq,
 686         .set_radio_freq = tda8295_set_freq,
 687         .has_signal     = tda8295_has_signal,
 688         .standby        = tda8295_standby,
 689         .release        = tda829x_release,
 690         .i2c_gate_ctrl  = tda8295_i2c_bridge,
 691 };
 692
 693 int tda829x_attach(struct tuner *t)
 694 {
 695         struct dvb_frontend *fe = &t->fe;
 696         struct tda8290_priv *priv = NULL;
 697
 698         priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 699         if (priv == NULL)
 700                 return -ENOMEM;
 701         fe->analog_demod_priv = priv;
 702
 703         priv->i2c_props.addr     = t->i2c->addr;
 704         priv->i2c_props.adap     = t->i2c->adapter;
 705         priv->cfg.config         = &t->config;
 706         priv->cfg.tuner_callback = t->tuner_callback;
 707         priv->t = t;
 708
 709         if (tda8290_probe(&priv->i2c_props) == 0) {
 710                 priv->ver = TDA8290;
 711                 fe->ops.analog_demod_ops = &tda8290_tuner_ops;
 712         }
 713
 714         if (tda8295_probe(&priv->i2c_props) == 0) {
 715                 priv->ver = TDA8295;
 716                 fe->ops.analog_demod_ops = &tda8295_tuner_ops;
 717         }
 718
 719         if (tda829x_find_tuner(fe) < 0)
 720                 return -EINVAL;
 721
 722         if (priv->ver & TDA8290) {
 723                 tda8290_init_tuner(fe);
 724                 tda8290_init_if(fe);
 725         } else if (priv->ver & TDA8295)
 726                 tda8295_init_if(fe);
 727
 728         tuner_info("type set to %s\n", t->i2c->name);
 729
 730         t->mode = V4L2_TUNER_ANALOG_TV;
 731
 732         return 0;
 733 }
 734 EXPORT_SYMBOL_GPL(tda829x_attach);
 735
 736 int tda829x_probe(struct tuner *t)
 737 {
 738         struct tuner_i2c_props i2c_props = {
 739                 .adap = t->i2c->adapter,
 740                 .addr = t->i2c->addr
 741         };
 742
 743         unsigned char soft_reset[]   = { 0x00, 0x00 };
 744         unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 745         unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 746         unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 747         unsigned char addr_dto_lsb = 0x07;
 748         unsigned char data;
 749 #define PROBE_BUFFER_SIZE 8
 750         unsigned char buf[PROBE_BUFFER_SIZE];
 751         int i;
 752
 753         /* rule out tda9887, which would return the same byte repeatedly */
 754         tuner_i2c_xfer_send(&i2c_props, soft_reset, 1);
 755         tuner_i2c_xfer_recv(&i2c_props, buf, PROBE_BUFFER_SIZE);
 756         for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
 757                 if (buf[i] != buf[0])
 758                         break;
 759         }
 760
 761         /* all bytes are equal, not a tda829x - probably a tda9887 */
 762         if (i == PROBE_BUFFER_SIZE)
 763                 return -ENODEV;
 764
 765         if ((tda8290_probe(&i2c_props) == 0) ||
 766             (tda8295_probe(&i2c_props) == 0))
 767                 return 0;
 768
 769         /* fall back to old probing method */
 770         tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 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 == 0) {
 775                 tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 776                 tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 777                 tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 778                 tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 779                 if (data == 0x7b) {
 780                         return 0;
 781                 }
 782         }
 783         tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 784         return -ENODEV;
 785 }
 786 EXPORT_SYMBOL_GPL(tda829x_probe);
 787
 788 MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 789 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
 790 MODULE_LICENSE("GPL");
 791
 792 /*
 793  * Overrides for Emacs so that we follow Linus's tabbing style.
 794  * ---------------------------------------------------------------------------
 795  * Local variables:
 796  * c-basic-offset: 8
 797  * End:
 798  */