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
  29 static int tuner_debug = 0;
  30 module_param_named(debug, tuner_debug, int, 0644);
  31 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  32
  33 #define PREFIX "tda8290 "
  34
  35 /* ---------------------------------------------------------------------- */
  36
  37 struct tda8290_priv {
  38         struct tuner_i2c_props i2c_props;
  39
  40         unsigned char tda8290_easy_mode;
  41
  42         unsigned char tda827x_addr;
  43         unsigned char tda827x_ver;
  44
  45         struct tda827x_config cfg;
  46 };
  47
  48 /*---------------------------------------------------------------------*/
  49
  50 static void tda8290_i2c_bridge(struct tuner *t, int close)
  51 {
  52         struct tda8290_priv *priv = t->priv;
  53
  54         unsigned char  enable[2] = { 0x21, 0xC0 };
  55         unsigned char disable[2] = { 0x21, 0x00 };
  56         unsigned char *msg;
  57         if(close) {
  58                 msg = enable;
  59                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  60                 /* let the bridge stabilize */
  61                 msleep(20);
  62         } else {
  63                 msg = disable;
  64                 tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
  65         }
  66 }
  67
  68 /*---------------------------------------------------------------------*/
  69
  70 static void set_audio(struct tuner *t)
  71 {
  72         struct tda8290_priv *priv = t->priv;
  73         char* mode;
  74
  75         priv->cfg.tda827x_lpsel = 0;
  76         if (t->std & V4L2_STD_MN) {
  77                 priv->cfg.sgIF = 92;
  78                 priv->tda8290_easy_mode = 0x01;
  79                 priv->cfg.tda827x_lpsel = 1;
  80                 mode = "MN";
  81         } else if (t->std & V4L2_STD_B) {
  82                 priv->cfg.sgIF = 108;
  83                 priv->tda8290_easy_mode = 0x02;
  84                 mode = "B";
  85         } else if (t->std & V4L2_STD_GH) {
  86                 priv->cfg.sgIF = 124;
  87                 priv->tda8290_easy_mode = 0x04;
  88                 mode = "GH";
  89         } else if (t->std & V4L2_STD_PAL_I) {
  90                 priv->cfg.sgIF = 124;
  91                 priv->tda8290_easy_mode = 0x08;
  92                 mode = "I";
  93         } else if (t->std & V4L2_STD_DK) {
  94                 priv->cfg.sgIF = 124;
  95                 priv->tda8290_easy_mode = 0x10;
  96                 mode = "DK";
  97         } else if (t->std & V4L2_STD_SECAM_L) {
  98                 priv->cfg.sgIF = 124;
  99                 priv->tda8290_easy_mode = 0x20;
 100                 mode = "L";
 101         } else if (t->std & V4L2_STD_SECAM_LC) {
 102                 priv->cfg.sgIF = 20;
 103                 priv->tda8290_easy_mode = 0x40;
 104                 mode = "LC";
 105         } else {
 106                 priv->cfg.sgIF = 124;
 107                 priv->tda8290_easy_mode = 0x10;
 108                 mode = "xx";
 109         }
 110
 111         if (t->mode == V4L2_TUNER_RADIO)
 112                 priv->cfg.sgIF = 88; /* if frequency is 5.5 MHz */
 113
 114         tuner_dbg("setting tda8290 to system %s\n", mode);
 115 }
 116
 117 static void tda8290_set_freq(struct tuner *t, unsigned int freq)
 118 {
 119         struct tda8290_priv *priv = t->priv;
 120         unsigned char soft_reset[]  = { 0x00, 0x00 };
 121         unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
 122         unsigned char expert_mode[] = { 0x01, 0x80 };
 123         unsigned char agc_out_on[]  = { 0x02, 0x00 };
 124         unsigned char gainset_off[] = { 0x28, 0x14 };
 125         unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
 126         unsigned char adc_head_6[]  = { 0x05, 0x04 };
 127         unsigned char adc_head_9[]  = { 0x05, 0x02 };
 128         unsigned char adc_head_12[] = { 0x05, 0x01 };
 129         unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
 130         unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
 131         unsigned char gainset_2[]   = { 0x28, 0x64 };
 132         unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
 133         unsigned char agc_rst_off[] = { 0x0e, 0x09 };
 134         unsigned char if_agc_set[]  = { 0x0f, 0x81 };
 135         unsigned char addr_adc_sat  = 0x1a;
 136         unsigned char addr_agc_stat = 0x1d;
 137         unsigned char addr_pll_stat = 0x1b;
 138         unsigned char adc_sat, agc_stat,
 139                       pll_stat;
 140         int i;
 141
 142         struct analog_parameters params = {
 143                 .frequency = freq,
 144                 .mode      = t->mode,
 145                 .audmode   = t->audmode,
 146                 .std       = t->std
 147         };
 148
 149         set_audio(t);
 150
 151         tuner_dbg("tda827xa config is 0x%02x\n", t->config);
 152         tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
 153         tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
 154         tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
 155         msleep(1);
 156
 157         expert_mode[1] = priv->tda8290_easy_mode + 0x80;
 158         tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
 159         tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
 160         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
 161         if (priv->tda8290_easy_mode & 0x60)
 162                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
 163         else
 164                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
 165         tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);
 166
 167         tda8290_i2c_bridge(t, 1);
 168
 169         if (t->fe.ops.tuner_ops.set_analog_params)
 170                 t->fe.ops.tuner_ops.set_analog_params(&t->fe, &params);
 171
 172         for (i = 0; i < 3; i++) {
 173                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 174                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 175                 if (pll_stat & 0x80) {
 176                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 177                         tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 178                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 179                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 180                         tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
 181                         break;
 182                 } else {
 183                         tuner_dbg("tda8290 not locked, no signal?\n");
 184                         msleep(100);
 185                 }
 186         }
 187         /* adjust headroom resp. gain */
 188         if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
 189                 tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
 190                            agc_stat, adc_sat, pll_stat & 0x80);
 191                 tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
 192                 msleep(100);
 193                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 194                 tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 195                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 196                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 197                 if ((agc_stat > 115) || !(pll_stat & 0x80)) {
 198                         tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
 199                                    agc_stat, pll_stat & 0x80);
 200                         if (priv->cfg.agcf)
 201                                 priv->cfg.agcf(&t->fe);
 202                         msleep(100);
 203                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
 204                         tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
 205                         tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 206                         tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 207                         if((agc_stat > 115) || !(pll_stat & 0x80)) {
 208                                 tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
 209                                 tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
 210                                 tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
 211                                 msleep(100);
 212                         }
 213                 }
 214         }
 215
 216         /* l/ l' deadlock? */
 217         if(priv->tda8290_easy_mode & 0x60) {
 218                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
 219                 tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
 220                 tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
 221                 tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
 222                 if ((adc_sat > 20) || !(pll_stat & 0x80)) {
 223                         tuner_dbg("trying to resolve SECAM L deadlock\n");
 224                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
 225                         msleep(40);
 226                         tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
 227                 }
 228         }
 229
 230         tda8290_i2c_bridge(t, 0);
 231         tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
 232 }
 233
 234 /*---------------------------------------------------------------------*/
 235
 236 static int tda8290_has_signal(struct tuner *t)
 237 {
 238         struct tda8290_priv *priv = t->priv;
 239
 240         unsigned char i2c_get_afc[1] = { 0x1B };
 241         unsigned char afc = 0;
 242
 243         tuner_i2c_xfer_send(&priv->i2c_props, i2c_get_afc, ARRAY_SIZE(i2c_get_afc));
 244         tuner_i2c_xfer_recv(&priv->i2c_props, &afc, 1);
 245         return (afc & 0x80)? 65535:0;
 246 }
 247
 248 /*---------------------------------------------------------------------*/
 249
 250 static void tda8290_standby(struct tuner *t)
 251 {
 252         struct tda8290_priv *priv = t->priv;
 253         unsigned char cb1[] = { 0x30, 0xD0 };
 254         unsigned char tda8290_standby[] = { 0x00, 0x02 };
 255         unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
 256         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
 257
 258         tda8290_i2c_bridge(t, 1);
 259         if (priv->tda827x_ver != 0)
 260                 cb1[1] = 0x90;
 261         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 262         tda8290_i2c_bridge(t, 0);
 263         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
 264         tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
 265 }
 266
 267 static void tda8290_init_if(struct tuner *t)
 268 {
 269         struct tda8290_priv *priv = t->priv;
 270
 271         unsigned char set_VS[] = { 0x30, 0x6F };
 272         unsigned char set_GP00_CF[] = { 0x20, 0x01 };
 273         unsigned char set_GP01_CF[] = { 0x20, 0x0B };
 274
 275         if ((t->config == 1) || (t->config == 2))
 276                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP00_CF, 2);
 277         else
 278                 tuner_i2c_xfer_send(&priv->i2c_props, set_GP01_CF, 2);
 279         tuner_i2c_xfer_send(&priv->i2c_props, set_VS, 2);
 280 }
 281
 282 static void tda8290_init_tuner(struct tuner *t)
 283 {
 284         struct tda8290_priv *priv = t->priv;
 285         unsigned char tda8275_init[]  = { 0x00, 0x00, 0x00, 0x40, 0xdC, 0x04, 0xAf,
 286                                           0x3F, 0x2A, 0x04, 0xFF, 0x00, 0x00, 0x40 };
 287         unsigned char tda8275a_init[] = { 0x00, 0x00, 0x00, 0x00, 0xdC, 0x05, 0x8b,
 288                                           0x0c, 0x04, 0x20, 0xFF, 0x00, 0x00, 0x4b };
 289         struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0,
 290                               .buf=tda8275_init, .len = 14};
 291         if (priv->tda827x_ver != 0)
 292                 msg.buf = tda8275a_init;
 293
 294         tda8290_i2c_bridge(t, 1);
 295         i2c_transfer(priv->i2c_props.adap, &msg, 1);
 296         tda8290_i2c_bridge(t, 0);
 297 }
 298
 299 /*---------------------------------------------------------------------*/
 300
 301 static void tda8290_release(struct tuner *t)
 302 {
 303         if (t->fe.ops.tuner_ops.release)
 304                 t->fe.ops.tuner_ops.release(&t->fe);
 305
 306         kfree(t->priv);
 307         t->priv = NULL;
 308 }
 309
 310 static struct tuner_operations tda8290_tuner_ops = {
 311         .set_tv_freq    = tda8290_set_freq,
 312         .set_radio_freq = tda8290_set_freq,
 313         .has_signal     = tda8290_has_signal,
 314         .standby        = tda8290_standby,
 315         .release        = tda8290_release,
 316 };
 317
 318 int tda8290_attach(struct tuner *t)
 319 {
 320         struct tda8290_priv *priv = NULL;
 321         u8 data;
 322         int i, ret, tuners_found;
 323         u32 tuner_addrs;
 324         struct i2c_msg msg = {.flags=I2C_M_RD, .buf=&data, .len = 1};
 325
 326         priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 327         if (priv == NULL)
 328                 return -ENOMEM;
 329         t->priv = priv;
 330
 331         priv->i2c_props.addr     = t->i2c.addr;
 332         priv->i2c_props.adap     = t->i2c.adapter;
 333         priv->cfg.config         = &t->config;
 334         priv->cfg.tuner_callback = t->tuner_callback;
 335
 336         tda8290_i2c_bridge(t, 1);
 337         /* probe for tuner chip */
 338         tuners_found = 0;
 339         tuner_addrs = 0;
 340         for (i=0x60; i<= 0x63; i++) {
 341                 msg.addr = i;
 342                 ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 343                 if (ret == 1) {
 344                         tuners_found++;
 345                         tuner_addrs = (tuner_addrs << 8) + i;
 346                 }
 347         }
 348         /* if there is more than one tuner, we expect the right one is
 349            behind the bridge and we choose the highest address that doesn't
 350            give a response now
 351          */
 352         tda8290_i2c_bridge(t, 0);
 353         if(tuners_found > 1)
 354                 for (i = 0; i < tuners_found; i++) {
 355                         msg.addr = tuner_addrs  & 0xff;
 356                         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 357                         if(ret == 1)
 358                                 tuner_addrs = tuner_addrs >> 8;
 359                         else
 360                                 break;
 361                 }
 362         if (tuner_addrs == 0) {
 363                 tuner_addrs = 0x61;
 364                 tuner_info("could not clearly identify tuner address, defaulting to %x\n",
 365                              tuner_addrs);
 366         } else {
 367                 tuner_addrs = tuner_addrs & 0xff;
 368                 tuner_info("setting tuner address to %x\n", tuner_addrs);
 369         }
 370         priv->tda827x_addr = tuner_addrs;
 371         msg.addr = tuner_addrs;
 372
 373         tda8290_i2c_bridge(t, 1);
 374
 375         ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
 376         if( ret != 1)
 377                 tuner_warn("TDA827x access failed!\n");
 378
 379         if ((data & 0x3c) == 0) {
 380                 strlcpy(t->i2c.name, "tda8290+75", sizeof(t->i2c.name));
 381                 priv->tda827x_ver = 0;
 382         } else {
 383                 strlcpy(t->i2c.name, "tda8290+75a", sizeof(t->i2c.name));
 384                 priv->tda827x_ver = 2;
 385         }
 386         tda827x_attach(&t->fe, priv->tda827x_addr,
 387                        priv->i2c_props.adap, &priv->cfg);
 388
 389         /* FIXME: tda827x module doesn't probe the tuner until
 390          * tda827x_initial_sleep is called
 391          */
 392         if (t->fe.ops.tuner_ops.sleep)
 393                 t->fe.ops.tuner_ops.sleep(&t->fe);
 394
 395         memcpy(&t->ops, &tda8290_tuner_ops, sizeof(struct tuner_operations));
 396
 397         tuner_info("type set to %s\n", t->i2c.name);
 398
 399         priv->cfg.tda827x_lpsel = 0;
 400         t->mode = V4L2_TUNER_ANALOG_TV;
 401
 402         tda8290_init_tuner(t);
 403         tda8290_init_if(t);
 404         return 0;
 405 }
 406
 407 int tda8290_probe(struct tuner *t)
 408 {
 409         struct tuner_i2c_props i2c_props = {
 410                 .adap = t->i2c.adapter,
 411                 .addr = t->i2c.addr
 412         };
 413
 414         unsigned char soft_reset[]   = { 0x00, 0x00 };
 415         unsigned char easy_mode_b[]  = { 0x01, 0x02 };
 416         unsigned char easy_mode_g[]  = { 0x01, 0x04 };
 417         unsigned char restore_9886[] = { 0x00, 0xd6, 0x30 };
 418         unsigned char addr_dto_lsb = 0x07;
 419         unsigned char data;
 420
 421         tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 422         tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 423         tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 424         tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 425         if (data == 0) {
 426                 tuner_i2c_xfer_send(&i2c_props, easy_mode_g, 2);
 427                 tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 428                 tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
 429                 tuner_i2c_xfer_recv(&i2c_props, &data, 1);
 430                 if (data == 0x7b) {
 431                         return 0;
 432                 }
 433         }
 434         tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 435         return -1;
 436 }
 437
 438 EXPORT_SYMBOL_GPL(tda8290_probe);
 439 EXPORT_SYMBOL_GPL(tda8290_attach);
 440
 441 MODULE_DESCRIPTION("Philips TDA8290 + TDA8275 / TDA8275a tuner driver");
 442 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann");
 443 MODULE_LICENSE("GPL");
 444
 445 /*
 446  * Overrides for Emacs so that we follow Linus's tabbing style.
 447  * ---------------------------------------------------------------------------
 448  * Local variables:
 449  * c-basic-offset: 8
 450  * End:
 451  */