linux/drivers/media/common/tuners/tda8290.c
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   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/slab.h>
  25#include <linux/delay.h>
  26#include <linux/videodev2.h>
  27#include "tuner-i2c.h"
  28#include "tda8290.h"
  29#include "tda827x.h"
  30#include "tda18271.h"
  31
  32static int debug;
  33module_param(debug, int, 0644);
  34MODULE_PARM_DESC(debug, "enable verbose debug messages");
  35
  36static int deemphasis_50;
  37module_param(deemphasis_50, int, 0644);
  38MODULE_PARM_DESC(deemphasis_50, "0 - 75us deemphasis; 1 - 50us deemphasis");
  39
  40/* ---------------------------------------------------------------------- */
  41
  42struct tda8290_priv {
  43        struct tuner_i2c_props i2c_props;
  44
  45        unsigned char tda8290_easy_mode;
  46
  47        unsigned char tda827x_addr;
  48
  49        unsigned char ver;
  50#define TDA8290   1
  51#define TDA8295   2
  52#define TDA8275   4
  53#define TDA8275A  8
  54#define TDA18271 16
  55
  56        struct tda827x_config cfg;
  57};
  58
  59/*---------------------------------------------------------------------*/
  60
  61static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
  62{
  63        struct tda8290_priv *priv = fe->analog_demod_priv;
  64
  65        unsigned char  enable[2] = { 0x21, 0xC0 };
  66        unsigned char disable[2] = { 0x21, 0x00 };
  67        unsigned char *msg;
  68
  69        if (close) {
  70                msg = enable;
  71                tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  72                /* let the bridge stabilize */
  73                msleep(20);
  74        } else {
  75                msg = disable;
  76                tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  77        }
  78
  79        return 0;
  80}
  81
  82static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
  83{
  84        struct tda8290_priv *priv = fe->analog_demod_priv;
  85
  86        unsigned char  enable[2] = { 0x45, 0xc1 };
  87        unsigned char disable[2] = { 0x46, 0x00 };
  88        unsigned char buf[3] = { 0x45, 0x01, 0x00 };
  89        unsigned char *msg;
  90
  91        if (close) {
  92                msg = enable;
  93                tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  94                /* let the bridge stabilize */
  95                msleep(20);
  96        } else {
  97                msg = disable;
  98                tuner_i2c_xfer_send(&priv->i2c_props, msg, 1);
  99                tuner_i2c_xfer_recv(&priv->i2c_props, &msg[1], 1);
 100
 101                buf[2] = msg[1];
 102                buf[2] &= ~0x04;
 103                tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
 104                msleep(5);
 105
 106                msg[1] |= 0x04;
 107                tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
 108        }
 109
 110        return 0;
 111}
 112
 113/*---------------------------------------------------------------------*/
 114
 115static void set_audio(struct dvb_frontend *fe,
 116                      struct analog_parameters *params)
 117{
 118        struct tda8290_priv *priv = fe->analog_demod_priv;
 119        char* mode;
 120
 121        if (params->std & V4L2_STD_MN) {
 122                priv->tda8290_easy_mode = 0x01;
 123                mode = "MN";
 124        } else if (params->std & V4L2_STD_B) {
 125                priv->tda8290_easy_mode = 0x02;
 126                mode = "B";
 127        } else if (params->std & V4L2_STD_GH) {
 128                priv->tda8290_easy_mode = 0x04;
 129                mode = "GH";
 130        } else if (params->std & V4L2_STD_PAL_I) {
 131                priv->tda8290_easy_mode = 0x08;
 132                mode = "I";
 133        } else if (params->std & V4L2_STD_DK) {
 134                priv->tda8290_easy_mode = 0x10;
 135                mode = "DK";
 136        } else if (params->std & V4L2_STD_SECAM_L) {
 137                priv->tda8290_easy_mode = 0x20;
 138                mode = "L";
 139        } else if (params->std & V4L2_STD_SECAM_LC) {
 140                priv->tda8290_easy_mode = 0x40;
 141                mode = "LC";
 142        } else {
 143                priv->tda8290_easy_mode = 0x10;
 144                mode = "xx";
 145        }
 146
 147        if (params->mode == V4L2_TUNER_RADIO) {
 148                /* Set TDA8295 to FM radio; Start TDA8290 with MN values */
 149                priv->tda8290_easy_mode = (priv->ver & TDA8295) ? 0x80 : 0x01;
 150                tuner_dbg("setting to radio FM\n");
 151        } else {
 152                tuner_dbg("setting tda829x to system %s\n", mode);
 153        }
 154}
 155
 156static struct {
 157        unsigned char seq[2];
 158} fm_mode[] = {
 159        { { 0x01, 0x81} },      /* Put device into expert mode */
 160        { { 0x03, 0x48} },      /* Disable NOTCH and VIDEO filters */
 161        { { 0x04, 0x04} },      /* Disable color carrier filter (SSIF) */
 162        { { 0x05, 0x04} },      /* ADC headroom */
 163        { { 0x06, 0x10} },      /* group delay flat */
 164
 165        { { 0x07, 0x00} },      /* use the same radio DTO values as a tda8295 */
 166        { { 0x08, 0x00} },
 167        { { 0x09, 0x80} },
 168        { { 0x0a, 0xda} },
 169        { { 0x0b, 0x4b} },
 170        { { 0x0c, 0x68} },
 171
 172        { { 0x0d, 0x00} },      /* PLL off, no video carrier detect */
 173        { { 0x14, 0x00} },      /* disable auto mute if no video */
 174};
 175
 176static void tda8290_set_params(struct dvb_frontend *fe,
 177                               struct analog_parameters *params)
 178{
 179        struct tda8290_priv *priv = fe->analog_demod_priv;
 180
 181        unsigned char soft_reset[]  = { 0x00, 0x00 };
 182        unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 183        unsigned char expert_mode[] = { 0x01, 0x80 };
 184        unsigned char agc_out_on[]  = { 0x02, 0x00 };
 185        unsigned char gainset_off[] = { 0x28, 0x14 };
 186        unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 187        unsigned char adc_head_6[]  = { 0x05, 0x04 };
 188        unsigned char adc_head_9[]  = { 0x05, 0x02 };
 189        unsigned char adc_head_12[] = { 0x05, 0x01 };
 190        unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 191        unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 192        unsigned char gainset_2[]   = { 0x28, 0x64 };
 193        unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 194        unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 195        unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 196        unsigned char addr_adc_sat  = 0x1a;
 197        unsigned char addr_agc_stat = 0x1d;
 198        unsigned char addr_pll_stat = 0x1b;
 199        unsigned char adc_sat, agc_stat,
 200                      pll_stat;
 201        int i;
 202
 203        set_audio(fe, params);
 204
 205        if (priv->cfg.config)
 206                tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
 207        tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 208        tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 209        tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 210        msleep(1);
 211
 212        if (params->mode == V4L2_TUNER_RADIO) {
 213                unsigned char deemphasis[]  = { 0x13, 1 };
 214
 215                /* FIXME: allow using a different deemphasis */
 216
 217                if (deemphasis_50)
 218                        deemphasis[1] = 2;
 219
 220                for (i = 0; i < ARRAY_SIZE(fm_mode); i++)
 221                        tuner_i2c_xfer_send(&priv->i2c_props, fm_mode[i].seq, 2);
 222
 223                tuner_i2c_xfer_send(&priv->i2c_props, deemphasis, 2);
 224        } else {
 225                expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 226                tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 227                tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 228                tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 229                if (priv->tda8290_easy_mode & 0x60)
 230                        tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 231                else
 232                        tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 233                tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 234        }
 235
 236        tda8290_i2c_bridge(fe, 1);
 237
 238        if (fe->ops.tuner_ops.set_analog_params)
 239                fe->ops.tuner_ops.set_analog_params(fe, params);
 240
 241        for (i = 0; i < 3; i++) {
 242                tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 243                tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 244                if (pll_stat & 0x80) {
 245                        tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 246                        tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 247                        tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 248                        tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 249                        tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 250                        break;
 251                } else {
 252                        tuner_dbg("tda8290 not locked, no signal?\n");
 253                        msleep(100);
 254                }
 255        }
 256        /* adjust headroom resp. gain */
 257        if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 258                tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 259                           agc_stat, adc_sat, pll_stat & 0x80);
 260                tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 261                msleep(100);
 262                tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 263                tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 264                tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 265                tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 266                if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 267                        tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 268                                   agc_stat, pll_stat & 0x80);
 269                        if (priv->cfg.agcf)
 270                                priv->cfg.agcf(fe);
 271                        msleep(100);
 272                        tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 273                        tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 274                        tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 275                        tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 276                        if((agc_stat > 115) || !(pll_stat & 0x80)) {
 277                                tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 278                                tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 279                                tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 280                                msleep(100);
 281                        }
 282                }
 283        }
 284
 285        /* l/ l' deadlock? */
 286        if(priv->tda8290_easy_mode & 0x60) {
 287                tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 288                tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 289                tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 290                tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 291                if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 292                        tuner_dbg("trying to resolve SECAM L deadlock\n");
 293                        tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 294                        msleep(40);
 295                        tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 296                }
 297        }
 298
 299        tda8290_i2c_bridge(fe, 0);
 300        tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
 301}
 302
 303/*---------------------------------------------------------------------*/
 304
 305static void tda8295_power(struct dvb_frontend *fe, int enable)
 306{
 307        struct tda8290_priv *priv = fe->analog_demod_priv;
 308        unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */
 309
 310        tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 311        tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 312
 313        if (enable)
 314                buf[1] = 0x01;
 315        else
 316                buf[1] = 0x03;
 317
 318        tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 319}
 320
 321static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
 322{
 323        struct tda8290_priv *priv = fe->analog_demod_priv;
 324        unsigned char buf[] = { 0x01, 0x00 };
 325
 326        tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 327        tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 328
 329        if (enable)
 330                buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
 331        else
 332                buf[1] = 0x00; /* reset active bit */
 333
 334        tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 335}
 336
 337static void tda8295_set_video_std(struct dvb_frontend *fe)
 338{
 339        struct tda8290_priv *priv = fe->analog_demod_priv;
 340        unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };
 341
 342        tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 343
 344        tda8295_set_easy_mode(fe, 1);
 345        msleep(20);
 346        tda8295_set_easy_mode(fe, 0);
 347}
 348
 349/*---------------------------------------------------------------------*/
 350
 351static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
 352{
 353        struct tda8290_priv *priv = fe->analog_demod_priv;
 354        unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */
 355
 356        tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
 357        tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);
 358
 359        if (enable)
 360                buf[1] &= ~0x40;
 361        else
 362                buf[1] |= 0x40;
 363
 364        tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
 365}
 366
 367static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
 368{
 369        struct tda8290_priv *priv = fe->analog_demod_priv;
 370        unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
 371        unsigned char set_gpio_val[]   = { 0x46, 0x00 };
 372
 373        tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_cf[0], 1);
 374        tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_cf[1], 1);
 375        tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_val[0], 1);
 376        tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_val[1], 1);
 377
 378        set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */
 379
 380        if (enable) {
 381                set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
 382                set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
 383        }
 384        tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
 385        tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
 386}
 387
 388static int tda8295_has_signal(struct dvb_frontend *fe)
 389{
 390        struct tda8290_priv *priv = fe->analog_demod_priv;
 391
 392        unsigned char hvpll_stat = 0x26;
 393        unsigned char ret;
 394
 395        tuner_i2c_xfer_send(&priv->i2c_props, &hvpll_stat, 1);
 396        tuner_i2c_xfer_recv(&priv->i2c_props, &ret, 1);
 397        return (ret & 0x01) ? 65535 : 0;
 398}
 399
 400/*---------------------------------------------------------------------*/
 401
 402static void tda8295_set_params(struct dvb_frontend *fe,
 403                               struct analog_parameters *params)
 404{
 405        struct tda8290_priv *priv = fe->analog_demod_priv;
 406
 407        unsigned char blanking_mode[]     = { 0x1d, 0x00 };
 408
 409        set_audio(fe, params);
 410
 411        tuner_dbg("%s: freq = %d\n", __func__, params->frequency);
 412
 413        tda8295_power(fe, 1);
 414        tda8295_agc1_out(fe, 1);
 415
 416        tuner_i2c_xfer_send(&priv->i2c_props, &blanking_mode[0], 1);
 417        tuner_i2c_xfer_recv(&priv->i2c_props, &blanking_mode[1], 1);
 418
 419        tda8295_set_video_std(fe);
 420
 421        blanking_mode[1] = 0x03;
 422        tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
 423        msleep(20);
 424
 425        tda8295_i2c_bridge(fe, 1);
 426
 427        if (fe->ops.tuner_ops.set_analog_params)
 428                fe->ops.tuner_ops.set_analog_params(fe, params);
 429
 430        if (priv->cfg.agcf)
 431                priv->cfg.agcf(fe);
 432
 433        if (tda8295_has_signal(fe))
 434                tuner_dbg("tda8295 is locked\n");
 435        else
 436                tuner_dbg("tda8295 not locked, no signal?\n");
 437
 438        tda8295_i2c_bridge(fe, 0);
 439}
 440
 441/*---------------------------------------------------------------------*/
 442
 443static int tda8290_has_signal(struct dvb_frontend *fe)
 444{
 445        struct tda8290_priv *priv = fe->analog_demod_priv;
 446
 447        unsigned char i2c_get_afc[1] = { 0x1B };
 448        unsigned char afc = 0;
 449
 450        tuner_i2c_xfer_send(&priv->i2c_props, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 451        tuner_i2c_xfer_recv(&priv->i2c_props, &afc, 1);
 452        return (afc & 0x80)? 65535:0;
 453}
 454
 455/*---------------------------------------------------------------------*/
 456
 457static void tda8290_standby(struct dvb_frontend *fe)
 458{
 459        struct tda8290_priv *priv = fe->analog_demod_priv;
 460
 461        unsigned char cb1[] = { 0x30, 0xD0 };
 462        unsigned char tda8290_standby[] = { 0x00, 0x02 };
 463        unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 464        struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 465
 466        tda8290_i2c_bridge(fe, 1);
 467        if (priv->ver & TDA8275A)
 468                cb1[1] = 0x90;
 469        i2c_transfer(priv->i2c_props.adap, &msg, 1);
 470        tda8290_i2c_bridge(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
 475static 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
 482static void tda8290_init_if(struct dvb_frontend *fe)
 483{
 484        struct tda8290_priv *priv = fe->analog_demod_priv;
 485
 486        unsigned char set_VS[] = { 0x30, 0x6F };
 487        unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 488        unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 489
 490        if ((priv->cfg.config == 1) || (priv->cfg.config == 2))
 491                tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 492        else
 493                tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 494        tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 495}
 496
 497static void tda8295_init_if(struct dvb_frontend *fe)
 498{
 499        struct tda8290_priv *priv = fe->analog_demod_priv;
 500
 501        static unsigned char set_adc_ctl[]       = { 0x33, 0x14 };
 502        static unsigned char set_adc_ctl2[]      = { 0x34, 0x00 };
 503        static unsigned char set_pll_reg6[]      = { 0x3e, 0x63 };
 504        static unsigned char set_pll_reg0[]      = { 0x38, 0x23 };
 505        static unsigned char set_pll_reg7[]      = { 0x3f, 0x01 };
 506        static unsigned char set_pll_reg10[]     = { 0x42, 0x61 };
 507        static unsigned char set_gpio_reg0[]     = { 0x44, 0x0b };
 508
 509        tda8295_power(fe, 1);
 510
 511        tda8295_set_easy_mode(fe, 0);
 512        tda8295_set_video_std(fe);
 513
 514        tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl, 2);
 515        tuner_i2c_xfer_send(&priv->i2c_props, set_adc_ctl2, 2);
 516        tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg6, 2);
 517        tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg0, 2);
 518        tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg7, 2);
 519        tuner_i2c_xfer_send(&priv->i2c_props, set_pll_reg10, 2);
 520        tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_reg0, 2);
 521
 522        tda8295_agc1_out(fe, 0);
 523        tda8295_agc2_out(fe, 0);
 524}
 525
 526static void tda8290_init_tuner(struct dvb_frontend *fe)
 527{
 528        struct tda8290_priv *priv = fe->analog_demod_priv;
 529        unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 530                                          0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 531        unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 532                                          0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 533        struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 534                              .buf=tda8275_init, .len = 14};
 535        if (priv->ver & TDA8275A)
 536                msg.buf = tda8275a_init;
 537
 538        tda8290_i2c_bridge(fe, 1);
 539        i2c_transfer(priv->i2c_props.adap, &msg, 1);
 540        tda8290_i2c_bridge(fe, 0);
 541}
 542
 543/*---------------------------------------------------------------------*/
 544
 545static void tda829x_release(struct dvb_frontend *fe)
 546{
 547        struct tda8290_priv *priv = fe->analog_demod_priv;
 548
 549        /* only try to release the tuner if we've
 550         * attached it from within this module */
 551        if (priv->ver & (TDA18271 | TDA8275 | TDA8275A))
 552                if (fe->ops.tuner_ops.release)
 553                        fe->ops.tuner_ops.release(fe);
 554
 555        kfree(fe->analog_demod_priv);
 556        fe->analog_demod_priv = NULL;
 557}
 558
 559static struct tda18271_config tda829x_tda18271_config = {
 560        .gate    = TDA18271_GATE_ANALOG,
 561};
 562
 563static int tda829x_find_tuner(struct dvb_frontend *fe)
 564{
 565        struct tda8290_priv *priv = fe->analog_demod_priv;
 566        struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
 567        int i, ret, tuners_found;
 568        u32 tuner_addrs;
 569        u8 data;
 570        struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
 571
 572        if (!analog_ops->i2c_gate_ctrl) {
 573                printk(KERN_ERR "tda8290: no gate control were provided!\n");
 574
 575                return -EINVAL;
 576        }
 577
 578        analog_ops->i2c_gate_ctrl(fe, 1);
 579
 580        /* probe for tuner chip */
 581        tuners_found = 0;
 582        tuner_addrs = 0;
 583        for (i = 0x60; i <= 0x63; i++) {
 584                msg.addr = i;
 585                ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 586                if (ret == 1) {
 587                        tuners_found++;
 588                        tuner_addrs = (tuner_addrs << 8) + i;
 589                }
 590        }
 591        /* if there is more than one tuner, we expect the right one is
 592           behind the bridge and we choose the highest address that doesn't
 593           give a response now
 594         */
 595
 596        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, "
 611                           "defaulting to %x\n", 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        analog_ops->i2c_gate_ctrl(fe, 1);
 620        ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 621
 622        if (ret != 1) {
 623                tuner_warn("tuner access failed!\n");
 624                analog_ops->i2c_gate_ctrl(fe, 0);
 625                return -EREMOTEIO;
 626        }
 627
 628        if ((data == 0x83) || (data == 0x84)) {
 629                priv->ver |= TDA18271;
 630                tda829x_tda18271_config.config = priv->cfg.config;
 631                dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
 632                           priv->i2c_props.adap, &tda829x_tda18271_config);
 633        } else {
 634                if ((data & 0x3c) == 0)
 635                        priv->ver |= TDA8275;
 636                else
 637                        priv->ver |= TDA8275A;
 638
 639                dvb_attach(tda827x_attach, fe, priv->tda827x_addr,
 640                           priv->i2c_props.adap, &priv->cfg);
 641                priv->cfg.switch_addr = priv->i2c_props.addr;
 642        }
 643        if (fe->ops.tuner_ops.init)
 644                fe->ops.tuner_ops.init(fe);
 645
 646        if (fe->ops.tuner_ops.sleep)
 647                fe->ops.tuner_ops.sleep(fe);
 648
 649        analog_ops->i2c_gate_ctrl(fe, 0);
 650
 651        return 0;
 652}
 653
 654static int tda8290_probe(struct tuner_i2c_props *i2c_props)
 655{
 656#define TDA8290_ID 0x89
 657        unsigned char tda8290_id[] = { 0x1f, 0x00 };
 658
 659        /* detect tda8290 */
 660        tuner_i2c_xfer_send(i2c_props, &tda8290_id[0], 1);
 661        tuner_i2c_xfer_recv(i2c_props, &tda8290_id[1], 1);
 662
 663        if (tda8290_id[1] == TDA8290_ID) {
 664                if (debug)
 665                        printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
 666                               __func__, i2c_adapter_id(i2c_props->adap),
 667                               i2c_props->addr);
 668                return 0;
 669        }
 670
 671        return -ENODEV;
 672}
 673
 674static int tda8295_probe(struct tuner_i2c_props *i2c_props)
 675{
 676#define TDA8295_ID 0x8a
 677#define TDA8295C2_ID 0x8b
 678        unsigned char tda8295_id[] = { 0x2f, 0x00 };
 679
 680        /* detect tda8295 */
 681        tuner_i2c_xfer_send(i2c_props, &tda8295_id[0], 1);
 682        tuner_i2c_xfer_recv(i2c_props, &tda8295_id[1], 1);
 683
 684        if ((tda8295_id[1] & 0xfe) == TDA8295_ID) {
 685                if (debug)
 686                        printk(KERN_DEBUG "%s: %s detected @ %d-%04x\n",
 687                               __func__, (tda8295_id[1] == TDA8295_ID) ?
 688                               "tda8295c1" : "tda8295c2",
 689                               i2c_adapter_id(i2c_props->adap),
 690                               i2c_props->addr);
 691                return 0;
 692        }
 693
 694        return -ENODEV;
 695}
 696
 697static struct analog_demod_ops tda8290_ops = {
 698        .set_params     = tda8290_set_params,
 699        .has_signal     = tda8290_has_signal,
 700        .standby        = tda8290_standby,
 701        .release        = tda829x_release,
 702        .i2c_gate_ctrl  = tda8290_i2c_bridge,
 703};
 704
 705static struct analog_demod_ops tda8295_ops = {
 706        .set_params     = tda8295_set_params,
 707        .has_signal     = tda8295_has_signal,
 708        .standby        = tda8295_standby,
 709        .release        = tda829x_release,
 710        .i2c_gate_ctrl  = tda8295_i2c_bridge,
 711};
 712
 713struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
 714                                    struct i2c_adapter *i2c_adap, u8 i2c_addr,
 715                                    struct tda829x_config *cfg)
 716{
 717        struct tda8290_priv *priv = NULL;
 718        char *name;
 719
 720        priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 721        if (priv == NULL)
 722                return NULL;
 723        fe->analog_demod_priv = priv;
 724
 725        priv->i2c_props.addr     = i2c_addr;
 726        priv->i2c_props.adap     = i2c_adap;
 727        priv->i2c_props.name     = "tda829x";
 728        if (cfg)
 729                priv->cfg.config         = cfg->lna_cfg;
 730
 731        if (tda8290_probe(&priv->i2c_props) == 0) {
 732                priv->ver = TDA8290;
 733                memcpy(&fe->ops.analog_ops, &tda8290_ops,
 734                       sizeof(struct analog_demod_ops));
 735        }
 736
 737        if (tda8295_probe(&priv->i2c_props) == 0) {
 738                priv->ver = TDA8295;
 739                memcpy(&fe->ops.analog_ops, &tda8295_ops,
 740                       sizeof(struct analog_demod_ops));
 741        }
 742
 743        if ((!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) &&
 744            (tda829x_find_tuner(fe) < 0))
 745                goto fail;
 746
 747        switch (priv->ver) {
 748        case TDA8290:
 749                name = "tda8290";
 750                break;
 751        case TDA8295:
 752                name = "tda8295";
 753                break;
 754        case TDA8290 | TDA8275:
 755                name = "tda8290+75";
 756                break;
 757        case TDA8295 | TDA8275:
 758                name = "tda8295+75";
 759                break;
 760        case TDA8290 | TDA8275A:
 761                name = "tda8290+75a";
 762                break;
 763        case TDA8295 | TDA8275A:
 764                name = "tda8295+75a";
 765                break;
 766        case TDA8290 | TDA18271:
 767                name = "tda8290+18271";
 768                break;
 769        case TDA8295 | TDA18271:
 770                name = "tda8295+18271";
 771                break;
 772        default:
 773                goto fail;
 774        }
 775        tuner_info("type set to %s\n", name);
 776
 777        fe->ops.analog_ops.info.name = name;
 778
 779        if (priv->ver & TDA8290) {
 780                if (priv->ver & (TDA8275 | TDA8275A))
 781                        tda8290_init_tuner(fe);
 782                tda8290_init_if(fe);
 783        } else if (priv->ver & TDA8295)
 784                tda8295_init_if(fe);
 785
 786        return fe;
 787
 788fail:
 789        tda829x_release(fe);
 790        return NULL;
 791}
 792EXPORT_SYMBOL_GPL(tda829x_attach);
 793
 794int tda829x_probe(struct i2c_adapter *i2c_adap, u8 i2c_addr)
 795{
 796        struct tuner_i2c_props i2c_props = {
 797                .adap = i2c_adap,
 798                .addr = i2c_addr,
 799        };
 800
 801        unsigned char soft_reset[]   = { 0x00, 0x00 };
 802        unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 803        unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 804        unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 805        unsigned char addr_dto_lsb = 0x07;
 806        unsigned char data;
 807#define PROBE_BUFFER_SIZE 8
 808        unsigned char buf[PROBE_BUFFER_SIZE];
 809        int i;
 810
 811        /* rule out tda9887, which would return the same byte repeatedly */
 812        tuner_i2c_xfer_send(&i2c_props, soft_reset, 1);
 813        tuner_i2c_xfer_recv(&i2c_props, buf, PROBE_BUFFER_SIZE);
 814        for (i = 1; i < PROBE_BUFFER_SIZE; i++) {
 815                if (buf[i] != buf[0])
 816                        break;
 817        }
 818
 819        /* all bytes are equal, not a tda829x - probably a tda9887 */
 820        if (i == PROBE_BUFFER_SIZE)
 821                return -ENODEV;
 822
 823        if ((tda8290_probe(&i2c_props) == 0) ||
 824            (tda8295_probe(&i2c_props) == 0))
 825                return 0;
 826
 827        /* fall back to old probing method */
 828        tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 829        tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 830        tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 831        tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 832        if (data == 0) {
 833                tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 834                tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 835                tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 836                tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 837                if (data == 0x7b) {
 838                        return 0;
 839                }
 840        }
 841        tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 842        return -ENODEV;
 843}
 844EXPORT_SYMBOL_GPL(tda829x_probe);
 845
 846MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 847MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
 848MODULE_LICENSE("GPL");
 849
 850/*
 851 * Overrides for Emacs so that we follow Linus's tabbing style.
 852 * ---------------------------------------------------------------------------
 853 * Local variables:
 854 * c-basic-offset: 8
 855 * End:
 856 */
 857