drivers/media/tuners/tda8290.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3
   4    i2c tv tuner chip device driver
   5    controls the philips tda8290+75 tuner chip combo.
   6
   7
   8    This "tda8290" module was split apart from the original "tuner" module.
   9 */
  10
  11 #include <linux/i2c.h>
  12 #include <linux/slab.h>
  13 #include <linux/delay.h>
  14 #include <linux/videodev2.h>
  15 #include "tuner-i2c.h"
  16 #include "tda8290.h"
  17 #include "tda827x.h"
  18 #include "tda18271.h"
  19
  20 static int debug;
  21 module_param(debug, int, 0644);
  22 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  23
  24 static int deemphasis_50;
  25 module_param(deemphasis_50, int, 0644);
  26 MODULE_PARM_DESC(deemphasis_50, "0 - 75us deemphasis; 1 - 50us deemphasis");
  27
  28 /* ---------------------------------------------------------------------- */
  29
  30 struct tda8290_priv {
  31         struct tuner_i2c_props i2c_props;
  32
  33         unsigned char tda8290_easy_mode;
  34
  35         unsigned char tda827x_addr;
  36
  37         unsigned char ver;
  38 #define TDA8290   1
  39 #define TDA8295   2
  40 #define TDA8275   4
  41 #define TDA8275A  8
  42 #define TDA18271 16
  43
  44         struct tda827x_config cfg;
  45         struct tda18271_std_map *tda18271_std_map;
  46 };
  47
  48 /*---------------------------------------------------------------------*/
  49
  50 static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
  51 {
  52         struct tda8290_priv *priv = fe->analog_demod_priv;
  53
  54         static unsigned char  enable[2] = { 0x21, 0xC0 };
  55         static unsigned char disable[2] = { 0x21, 0x00 };
  56         unsigned char *msg;
  57
  58         if (close) {
  59                 msg = enable;
  60                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  61                 /* let the bridge stabilize */
  62                 msleep(20);
  63         } else {
  64                 msg = disable;
  65                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  66         }
  67
  68         return 0;
  69 }
  70
  71 static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
  72 {
  73         struct tda8290_priv *priv = fe->analog_demod_priv;
  74
  75         static unsigned char  enable[2] = { 0x45, 0xc1 };
  76         static unsigned char disable[2] = { 0x46, 0x00 };
  77         static unsigned char buf[3] = { 0x45, 0x01, 0x00 };
  78         unsigned char *msg;
  79
  80         if (close) {
  81                 msg = enable;
  82                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  83                 /* let the bridge stabilize */
  84                 msleep(20);
  85         } else {
  86                 msg = disable;
  87                 tuner_i2c_xfer_send_recv(&priv->i2c_props, msg, 1, &msg[1], 1);
  88
  89                 buf[2] = msg[1];
  90                 buf[2] &= ~0x04;
  91                 tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
  92                 msleep(5);
  93
  94                 msg[1] |= 0x04;
  95                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  96         }
  97
  98         return 0;
  99 }
 100
 101 /*---------------------------------------------------------------------*/
 102
 103 static void set_audio(struct dvb_frontend *fe,
 104                       struct analog_parameters *params)
 105 {
 106         struct tda8290_priv *priv = fe->analog_demod_priv;
 107         char* mode;
 108
 109         if (params->std & V4L2_STD_MN) {
 110                 priv->tda8290_easy_mode = 0x01;
 111                 mode = "MN";
 112         } else if (params->std & V4L2_STD_B) {
 113                 priv->tda8290_easy_mode = 0x02;
 114                 mode = "B";
 115         } else if (params->std & V4L2_STD_GH) {
 116                 priv->tda8290_easy_mode = 0x04;
 117                 mode = "GH";
 118         } else if (params->std & V4L2_STD_PAL_I) {
 119                 priv->tda8290_easy_mode = 0x08;
 120                 mode = "I";
 121         } else if (params->std & V4L2_STD_DK) {
 122                 priv->tda8290_easy_mode = 0x10;
 123                 mode = "DK";
 124         } else if (params->std & V4L2_STD_SECAM_L) {
 125                 priv->tda8290_easy_mode = 0x20;
 126                 mode = "L";
 127         } else if (params->std & V4L2_STD_SECAM_LC) {
 128                 priv->tda8290_easy_mode = 0x40;
 129                 mode = "LC";
 130         } else {
 131                 priv->tda8290_easy_mode = 0x10;
 132                 mode = "xx";
 133         }
 134
 135         if (params->mode == V4L2_TUNER_RADIO) {
 136                 /* Set TDA8295 to FM radio; Start TDA8290 with MN values */
 137                 priv->tda8290_easy_mode = (priv->ver & TDA8295) ? 0x80 : 0x01;
 138                 tuner_dbg("setting to radio FM\n");
 139         } else {
 140                 tuner_dbg("setting tda829x to system %s\n", mode);
 141         }
 142 }
 143
 144 static struct {
 145         unsigned char seq[2];
 146 } fm_mode[] = {
 147         { { 0x01, 0x81} },      /* Put device into expert mode */
 148         { { 0x03, 0x48} },      /* Disable NOTCH and VIDEO filters */
 149         { { 0x04, 0x04} },      /* Disable color carrier filter (SSIF) */
 150         { { 0x05, 0x04} },      /* ADC headroom */
 151         { { 0x06, 0x10} },      /* group delay flat */
 152
 153         { { 0x07, 0x00} },      /* use the same radio DTO values as a tda8295 */
 154         { { 0x08, 0x00} },
 155         { { 0x09, 0x80} },
 156         { { 0x0a, 0xda} },
 157         { { 0x0b, 0x4b} },
 158         { { 0x0c, 0x68} },
 159
 160         { { 0x0d, 0x00} },      /* PLL off, no video carrier detect */
 161         { { 0x14, 0x00} },      /* disable auto mute if no video */
 162 };
 163
 164 static void tda8290_set_params(struct dvb_frontend *fe,
 165                                struct analog_parameters *params)
 166 {
 167         struct tda8290_priv *priv = fe->analog_demod_priv;
 168
 169         static unsigned char soft_reset[]  = { 0x00, 0x00 };
 170         unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 171         static unsigned char expert_mode[] = { 0x01, 0x80 };
 172         static unsigned char agc_out_on[]  = { 0x02, 0x00 };
 173         static unsigned char gainset_off[] = { 0x28, 0x14 };
 174         static unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 175         static unsigned char adc_head_6[]  = { 0x05, 0x04 };
 176         static unsigned char adc_head_9[]  = { 0x05, 0x02 };
 177         static unsigned char adc_head_12[] = { 0x05, 0x01 };
 178         static unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 179         static unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 180         static unsigned char gainset_2[]   = { 0x28, 0x64 };
 181         static unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 182         static unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 183         static unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 184         static unsigned char addr_adc_sat  = 0x1a;
 185         static unsigned char addr_agc_stat = 0x1d;
 186         static unsigned char addr_pll_stat = 0x1b;
 187         static unsigned char adc_sat = 0, agc_stat = 0,
 188                       pll_stat;
 189         int i;
 190
 191         set_audio(fe, params);
 192
 193         if (priv->cfg.config)
 194                 tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
 195         tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 196         tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 197         tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 198         msleep(1);
 199
 200         if (params->mode == V4L2_TUNER_RADIO) {
 201                 unsigned char deemphasis[]  = { 0x13, 1 };
 202
 203                 /* FIXME: allow using a different deemphasis */
 204
 205                 if (deemphasis_50)
 206                         deemphasis[1] = 2;
 207
 208                 for (i = 0; i < ARRAY_SIZE(fm_mode); i++)
 209                         tuner_i2c_xfer_send(&priv->i2c_props, fm_mode[i].seq, 2);
 210
 211                 tuner_i2c_xfer_send(&priv->i2c_props, deemphasis, 2);
 212         } else {
 213                 expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 214                 tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 215                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 216                 tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 217                 if (priv->tda8290_easy_mode & 0x60)
 218                         tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 219                 else
 220                         tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 221                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 222         }
 223
 224
 225         if (fe->ops.analog_ops.i2c_gate_ctrl)
 226                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 227
 228         if (fe->ops.tuner_ops.set_analog_params)
 229                 fe->ops.tuner_ops.set_analog_params(fe, params);
 230
 231         for (i = 0; i < 3; i++) {
 232                 tuner_i2c_xfer_send_recv(&priv->i2c_props,
 233                                          &addr_pll_stat, 1, &pll_stat, 1);
 234                 if (pll_stat & 0x80) {
 235                         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 236                                                  &addr_adc_sat, 1,
 237                                                  &adc_sat, 1);
 238                         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 239                                                  &addr_agc_stat, 1,
 240                                                  &agc_stat, 1);
 241                         tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 242                         break;
 243                 } else {
 244                         tuner_dbg("tda8290 not locked, no signal?\n");
 245                         msleep(100);
 246                 }
 247         }
 248         /* adjust headroom resp. gain */
 249         if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 250                 tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 251                            agc_stat, adc_sat, pll_stat & 0x80);
 252                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 253                 msleep(100);
 254                 tuner_i2c_xfer_send_recv(&priv->i2c_props,
 255                                          &addr_agc_stat, 1, &agc_stat, 1);
 256                 tuner_i2c_xfer_send_recv(&priv->i2c_props,
 257                                          &addr_pll_stat, 1, &pll_stat, 1);
 258                 if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 259                         tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 260                                    agc_stat, pll_stat & 0x80);
 261                         if (priv->cfg.agcf)
 262                                 priv->cfg.agcf(fe);
 263                         msleep(100);
 264                         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 265                                                  &addr_agc_stat, 1,
 266                                                  &agc_stat, 1);
 267                         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 268                                                  &addr_pll_stat, 1,
 269                                                  &pll_stat, 1);
 270                         if((agc_stat > 115) || !(pll_stat & 0x80)) {
 271                                 tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 272                                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 273                                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 274                                 msleep(100);
 275                         }
 276                 }
 277         }
 278
 279         /* l/ l' deadlock? */
 280         if(priv->tda8290_easy_mode & 0x60) {
 281                 tuner_i2c_xfer_send_recv(&priv->i2c_props,
 282                                          &addr_adc_sat, 1,
 283                                          &adc_sat, 1);
 284                 tuner_i2c_xfer_send_recv(&priv->i2c_props,
 285                                          &addr_pll_stat, 1,
 286                                          &pll_stat, 1);
 287                 if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 288                         tuner_dbg("trying to resolve SECAM L deadlock\n");
 289                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 290                         msleep(40);
 291                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 292                 }
 293         }
 294
 295         if (fe->ops.analog_ops.i2c_gate_ctrl)
 296                 fe->ops.analog_ops.i2c_gate_ctrl(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_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
 308
 309         if (enable)
 310                 buf[1] = 0x01;
 311         else
 312                 buf[1] = 0x03;
 313
 314         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 315 }
 316
 317 static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
 318 {
 319         struct tda8290_priv *priv = fe->analog_demod_priv;
 320         unsigned char buf[] = { 0x01, 0x00 };
 321
 322         tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
 323
 324         if (enable)
 325                 buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
 326         else
 327                 buf[1] = 0x00; /* reset active bit */
 328
 329         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 330 }
 331
 332 static void tda8295_set_video_std(struct dvb_frontend *fe)
 333 {
 334         struct tda8290_priv *priv = fe->analog_demod_priv;
 335         unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
 336
 337         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 338
 339         tda8295_set_easy_mode(fe, 1);
 340         msleep(20);
 341         tda8295_set_easy_mode(fe, 0);
 342 }
 343
 344 /*---------------------------------------------------------------------*/
 345
 346 static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
 347 {
 348         struct tda8290_priv *priv = fe->analog_demod_priv;
 349         unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
 350
 351         tuner_i2c_xfer_send_recv(&priv->i2c_props, &buf[0], 1, &buf[1], 1);
 352
 353         if (enable)
 354                 buf[1] &= ~0x40;
 355         else
 356                 buf[1] |= 0x40;
 357
 358         tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 359 }
 360
 361 static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
 362 {
 363         struct tda8290_priv *priv = fe->analog_demod_priv;
 364         unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
 365         unsigned char set_gpio_val[]   = { 0x46, 0x00 };
 366
 367         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 368                                  &set_gpio_cf[0], 1, &set_gpio_cf[1], 1);
 369         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 370                                  &set_gpio_val[0], 1, &set_gpio_val[1], 1);
 371
 372         set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
 373
 374         if (enable) {
 375                 set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
 376                 set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
 377         }
 378         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
 379         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
 380 }
 381
 382 static int tda8295_has_signal(struct dvb_frontend *fe, u16 *signal)
 383 {
 384         struct tda8290_priv *priv = fe->analog_demod_priv;
 385
 386         unsigned char hvpll_stat = 0x26;
 387         unsigned char ret;
 388
 389         tuner_i2c_xfer_send_recv(&priv->i2c_props, &hvpll_stat, 1, &ret, 1);
 390         *signal = (ret & 0x01) ? 65535 : 0;
 391         return 0;
 392 }
 393
 394 /*---------------------------------------------------------------------*/
 395
 396 static void tda8295_set_params(struct dvb_frontend *fe,
 397                                struct analog_parameters *params)
 398 {
 399         struct tda8290_priv *priv = fe->analog_demod_priv;
 400         u16 signal = 0;
 401         unsigned char blanking_mode[]     = { 0x1d, 0x00 };
 402
 403         set_audio(fe, params);
 404
 405         tuner_dbg("%s: freq = %d\n", __func__, params->frequency);
 406
 407         tda8295_power(fe, 1);
 408         tda8295_agc1_out(fe, 1);
 409
 410         tuner_i2c_xfer_send_recv(&priv->i2c_props,
 411                                  &blanking_mode[0], 1, &blanking_mode[1], 1);
 412
 413         tda8295_set_video_std(fe);
 414
 415         blanking_mode[1] = 0x03;
 416         tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
 417         msleep(20);
 418
 419         if (fe->ops.analog_ops.i2c_gate_ctrl)
 420                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 421
 422         if (fe->ops.tuner_ops.set_analog_params)
 423                 fe->ops.tuner_ops.set_analog_params(fe, params);
 424
 425         if (priv->cfg.agcf)
 426                 priv->cfg.agcf(fe);
 427
 428         tda8295_has_signal(fe, &signal);
 429         if (signal)
 430                 tuner_dbg("tda8295 is locked\n");
 431         else
 432                 tuner_dbg("tda8295 not locked, no signal?\n");
 433
 434         if (fe->ops.analog_ops.i2c_gate_ctrl)
 435                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 436 }
 437
 438 /*---------------------------------------------------------------------*/
 439
 440 static int tda8290_has_signal(struct dvb_frontend *fe, u16 *signal)
 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_recv(&priv->i2c_props,
 448                                  i2c_get_afc, ARRAY_SIZE(i2c_get_afc), &afc, 1);
 449         *signal = (afc & 0x80) ? 65535 : 0;
 450         return 0;
 451 }
 452
 453 /*---------------------------------------------------------------------*/
 454
 455 static void tda8290_standby(struct dvb_frontend *fe)
 456 {
 457         struct tda8290_priv *priv = fe->analog_demod_priv;
 458
 459         static unsigned char cb1[] = { 0x30, 0xD0 };
 460         static unsigned char tda8290_standby[] = { 0x00, 0x02 };
 461         static unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 462         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 463
 464         if (fe->ops.analog_ops.i2c_gate_ctrl)
 465                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 466         if (priv->ver & TDA8275A)
 467                 cb1[1] = 0x90;
 468         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 469         if (fe->ops.analog_ops.i2c_gate_ctrl)
 470                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 471         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
 472         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
 473 }
 474
 475 static void tda8295_standby(struct dvb_frontend *fe)
 476 {
 477         tda8295_agc1_out(fe, 0); /* Put AGC in tri-state */
 478
 479         tda8295_power(fe, 0);
 480 }
 481
 482 static void tda8290_init_if(struct dvb_frontend *fe)
 483 {
 484         struct tda8290_priv *priv = fe->analog_demod_priv;
 485
 486         static unsigned char set_VS[] = { 0x30, 0x6F };
 487         static unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 488         static unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 489
 490         if ((priv->cfg.config == TDA8290_LNA_GP0_HIGH_ON) ||
 491             (priv->cfg.config == TDA8290_LNA_GP0_HIGH_OFF))
 492                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 493         else
 494                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 495         tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 496 }
 497
 498 static void tda8295_init_if(struct dvb_frontend *fe)
 499 {
 500         struct tda8290_priv *priv = fe->analog_demod_priv;
 501
 502         static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
 503         static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
 504         static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
 505         static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
 506         static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
 507         static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
 508         static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
 509
 510         tda8295_power(fe, 1);
 511
 512         tda8295_set_easy_mode(fe, 0);
 513         tda8295_set_video_std(fe);
 514
 515         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
 516         tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
 517         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
 518         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
 519         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
 520         tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
 521         tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
 522
 523         tda8295_agc1_out(fe, 0);
 524         tda8295_agc2_out(fe, 0);
 525 }
 526
 527 static void tda8290_init_tuner(struct dvb_frontend *fe)
 528 {
 529         struct tda8290_priv *priv = fe->analog_demod_priv;
 530         static unsigned char tda8275_init[]  =
 531                 { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 532                   0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 533         static unsigned char tda8275a_init[] =
 534                  { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 535                    0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 536         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 537                               .buf=tda8275_init, .len = 14};
 538         if (priv->ver & TDA8275A)
 539                 msg.buf = tda8275a_init;
 540
 541         if (fe->ops.analog_ops.i2c_gate_ctrl)
 542                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 543         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 544         if (fe->ops.analog_ops.i2c_gate_ctrl)
 545                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 546 }
 547
 548 /*---------------------------------------------------------------------*/
 549
 550 static void tda829x_release(struct dvb_frontend *fe)
 551 {
 552         struct tda8290_priv *priv = fe->analog_demod_priv;
 553
 554         /* only try to release the tuner if we've
 555          * attached it from within this module */
 556         if (priv->ver & (TDA18271 | TDA8275 | TDA8275A))
 557                 if (fe->ops.tuner_ops.release)
 558                         fe->ops.tuner_ops.release(fe);
 559
 560         kfree(fe->analog_demod_priv);
 561         fe->analog_demod_priv = NULL;
 562 }
 563
 564 static struct tda18271_config tda829x_tda18271_config = {
 565         .gate    = TDA18271_GATE_ANALOG,
 566 };
 567
 568 static int tda829x_find_tuner(struct dvb_frontend *fe)
 569 {
 570         struct tda8290_priv *priv = fe->analog_demod_priv;
 571         int i, ret, tuners_found;
 572         u32 tuner_addrs;
 573         u8 data;
 574         struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
 575
 576         if (fe->ops.analog_ops.i2c_gate_ctrl)
 577                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 578
 579         /* probe for tuner chip */
 580         tuners_found = 0;
 581         tuner_addrs = 0;
 582         for (i = 0x60; i <= 0x63; i++) {
 583                 msg.addr = i;
 584                 ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 585                 if (ret == 1) {
 586                         tuners_found++;
 587                         tuner_addrs = (tuner_addrs << 8) + i;
 588                 }
 589         }
 590         /* if there is more than one tuner, we expect the right one is
 591            behind the bridge and we choose the highest address that doesn't
 592            give a response now
 593          */
 594
 595         if (fe->ops.analog_ops.i2c_gate_ctrl)
 596                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 597
 598         if (tuners_found > 1)
 599                 for (i = 0; i < tuners_found; i++) {
 600                         msg.addr = tuner_addrs  & 0xff;
 601                         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 602                         if (ret == 1)
 603                                 tuner_addrs = tuner_addrs >> 8;
 604                         else
 605                                 break;
 606                 }
 607
 608         if (tuner_addrs == 0) {
 609                 tuner_addrs = 0x60;
 610                 tuner_info("could not clearly identify tuner address, defaulting to %x\n",
 611                            tuner_addrs);
 612         } else {
 613                 tuner_addrs = tuner_addrs & 0xff;
 614                 tuner_info("setting tuner address to %x\n", tuner_addrs);
 615         }
 616         priv->tda827x_addr = tuner_addrs;
 617         msg.addr = tuner_addrs;
 618
 619         if (fe->ops.analog_ops.i2c_gate_ctrl)
 620                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
 621         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 622
 623         if (ret != 1) {
 624                 tuner_warn("tuner access failed!\n");
 625                 if (fe->ops.analog_ops.i2c_gate_ctrl)
 626                         fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 627                 return -EREMOTEIO;
 628         }
 629
 630         if ((data == 0x83) || (data == 0x84)) {
 631                 priv->ver |= TDA18271;
 632                 tda829x_tda18271_config.config = priv->cfg.config;
 633                 tda829x_tda18271_config.std_map = priv->tda18271_std_map;
 634                 dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
 635                            priv->i2c_props.adap, &tda829x_tda18271_config);
 636         } else {
 637                 if ((data & 0x3c) == 0)
 638                         priv->ver |= TDA8275;
 639                 else
 640                         priv->ver |= TDA8275A;
 641
 642                 dvb_attach(tda827x_attach, fe, priv->tda827x_addr,
 643                            priv->i2c_props.adap, &priv->cfg);
 644                 priv->cfg.switch_addr = priv->i2c_props.addr;
 645         }
 646         if (fe->ops.tuner_ops.init)
 647                 fe->ops.tuner_ops.init(fe);
 648
 649         if (fe->ops.tuner_ops.sleep)
 650                 fe->ops.tuner_ops.sleep(fe);
 651
 652         if (fe->ops.analog_ops.i2c_gate_ctrl)
 653                 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
 654
 655         return 0;
 656 }
 657
 658 static int tda8290_probe(struct tuner_i2c_props *i2c_props)
 659 {
 660 #define TDA8290_ID 0x89
 661         u8 reg = 0x1f, id;
 662         struct i2c_msg msg_read[] = {
 663                 { .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
 664                 { .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
 665         };
 666
 667         /* detect tda8290 */
 668         if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
 669                 printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
 670                                __func__, reg);
 671                 return -ENODEV;
 672         }
 673
 674         if (id == TDA8290_ID) {
 675                 if (debug)
 676                         printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
 677                                __func__, i2c_adapter_id(i2c_props->adap),
 678                                i2c_props->addr);
 679                 return 0;
 680         }
 681         return -ENODEV;
 682 }
 683
 684 static int tda8295_probe(struct tuner_i2c_props *i2c_props)
 685 {
 686 #define TDA8295_ID 0x8a
 687 #define TDA8295C2_ID 0x8b
 688         u8 reg = 0x2f, id;
 689         struct i2c_msg msg_read[] = {
 690                 { .addr = i2c_props->addr, .flags = 0, .len = 1, .buf = &reg },
 691                 { .addr = i2c_props->addr, .flags = I2C_M_RD, .len = 1, .buf = &id },
 692         };
 693
 694         /* detect tda8295 */
 695         if (i2c_transfer(i2c_props->adap, msg_read, 2) != 2) {
 696                 printk(KERN_WARNING "%s: couldn't read register 0x%02x\n",
 697                                __func__, reg);
 698                 return -ENODEV;
 699         }
 700
 701         if ((id & 0xfe) == TDA8295_ID) {
 702                 if (debug)
 703                         printk(KERN_DEBUG "%s: %s detected @ %d-%04x\n",
 704                                __func__, (id == TDA8295_ID) ?
 705                                "tda8295c1" : "tda8295c2",
 706                                i2c_adapter_id(i2c_props->adap),
 707                                i2c_props->addr);
 708                 return 0;
 709         }
 710
 711         return -ENODEV;
 712 }
 713
 714 static const struct analog_demod_ops tda8290_ops = {
 715         .set_params     = tda8290_set_params,
 716         .has_signal     = tda8290_has_signal,
 717         .standby        = tda8290_standby,
 718         .release        = tda829x_release,
 719         .i2c_gate_ctrl  = tda8290_i2c_bridge,
 720 };
 721
 722 static const struct analog_demod_ops tda8295_ops = {
 723         .set_params     = tda8295_set_params,
 724         .has_signal     = tda8295_has_signal,
 725         .standby        = tda8295_standby,
 726         .release        = tda829x_release,
 727         .i2c_gate_ctrl  = tda8295_i2c_bridge,
 728 };
 729
 730 struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
 731                                     struct i2c_adapter *i2c_adap, u8 i2c_addr,
 732                                     struct tda829x_config *cfg)
 733 {
 734         struct tda8290_priv *priv = NULL;
 735         char *name;
 736
 737         priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 738         if (priv == NULL)
 739                 return NULL;
 740         fe->analog_demod_priv = priv;
 741
 742         priv->i2c_props.addr     = i2c_addr;
 743         priv->i2c_props.adap     = i2c_adap;
 744         priv->i2c_props.name     = "tda829x";
 745         if (cfg) {
 746                 priv->cfg.config = cfg->lna_cfg;
 747                 priv->tda18271_std_map = cfg->tda18271_std_map;
 748         }
 749
 750         if (tda8290_probe(&priv->i2c_props) == 0) {
 751                 priv->ver = TDA8290;
 752                 memcpy(&fe->ops.analog_ops, &tda8290_ops,
 753                        sizeof(struct analog_demod_ops));
 754         }
 755
 756         if (tda8295_probe(&priv->i2c_props) == 0) {
 757                 priv->ver = TDA8295;
 758                 memcpy(&fe->ops.analog_ops, &tda8295_ops,
 759                        sizeof(struct analog_demod_ops));
 760         }
 761
 762         if (cfg && cfg->no_i2c_gate)
 763                 fe->ops.analog_ops.i2c_gate_ctrl = NULL;
 764
 765         if (!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) {
 766                 tda8295_power(fe, 1);
 767                 if (tda829x_find_tuner(fe) < 0)
 768                         goto fail;
 769         }
 770
 771         switch (priv->ver) {
 772         case TDA8290:
 773                 name = "tda8290";
 774                 break;
 775         case TDA8295:
 776                 name = "tda8295";
 777                 break;
 778         case TDA8290 | TDA8275:
 779                 name = "tda8290+75";
 780                 break;
 781         case TDA8295 | TDA8275:
 782                 name = "tda8295+75";
 783                 break;
 784         case TDA8290 | TDA8275A:
 785                 name = "tda8290+75a";
 786                 break;
 787         case TDA8295 | TDA8275A:
 788                 name = "tda8295+75a";
 789                 break;
 790         case TDA8290 | TDA18271:
 791                 name = "tda8290+18271";
 792                 break;
 793         case TDA8295 | TDA18271:
 794                 name = "tda8295+18271";
 795                 break;
 796         default:
 797                 goto fail;
 798         }
 799         tuner_info("type set to %s\n", name);
 800
 801         fe->ops.analog_ops.info.name = name;
 802
 803         if (priv->ver & TDA8290) {
 804                 if (priv->ver & (TDA8275 | TDA8275A))
 805                         tda8290_init_tuner(fe);
 806                 tda8290_init_if(fe);
 807         } else if (priv->ver & TDA8295)
 808                 tda8295_init_if(fe);
 809
 810         return fe;
 811
 812 fail:
 813         memset(&fe->ops.analog_ops, 0, sizeof(struct analog_demod_ops));
 814
 815         tda829x_release(fe);
 816         return NULL;
 817 }
 818 EXPORT_SYMBOL_GPL(tda829x_attach);
 819
 820 int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
 821 {
 822         struct tuner_i2c_props i2c_props = {
 823                 .adap = i2c_adap,
 824                 .addr = i2c_addr,
 825         };
 826
 827         static unsigned char soft_reset[]   = { 0x00, 0x00 };
 828         static unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 829         static unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 830         static unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 831         static unsigned char addr_dto_lsb = 0x07;
 832         unsigned char data;
 833 #define PROBE_BUFFER_SIZE 8
 834         unsigned char buf[PROBE_BUFFER_SIZE];
 835         int i;
 836
 837         /* rule out tda9887, which would return the same byte repeatedly */
 838         tuner_i2c_xfer_send_recv(&i2c_props,
 839                                  soft_reset, 1, buf, PROBE_BUFFER_SIZE);
 840         for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
 841                 if (buf[i] != buf[0])
 842                         break;
 843         }
 844
 845         /* all bytes are equal, not a tda829x - probably a tda9887 */
 846         if (i == PROBE_BUFFER_SIZE)
 847                 return -ENODEV;
 848
 849         if ((tda8290_probe(&i2c_props) == 0) ||
 850             (tda8295_probe(&i2c_props) == 0))
 851                 return 0;
 852
 853         /* fall back to old probing method */
 854         tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 855         tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 856         tuner_i2c_xfer_send_recv(&i2c_props, &addr_dto_lsb, 1, &data, 1);
 857         if (data == 0) {
 858                 tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 859                 tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 860                 tuner_i2c_xfer_send_recv(&i2c_props,
 861                                          &addr_dto_lsb, 1, &data, 1);
 862                 if (data == 0x7b) {
 863                         return 0;
 864                 }
 865         }
 866         tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 867         return -ENODEV;
 868 }
 869 EXPORT_SYMBOL_GPL(tda829x_probe);
 870
 871 MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 872 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
 873 MODULE_LICENSE("GPL");