git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/tuner-simple.c

   1 /*
   2  *
   3  * i2c tv tuner chip device driver
   4  * controls all those simple 4-control-bytes style tuners.
   5  */
   6 #include <linux/delay.h>
   7 #include <linux/i2c.h>
   8 #include <linux/videodev.h>
   9 #include <media/tuner.h>
  10
  11 static int offset = 0;
  12 module_param(offset, int, 0666);
  13 MODULE_PARM_DESC(offset,"Allows to specify an offset for tuner");
  14
  15 /* ---------------------------------------------------------------------- */
  16
  17 /* tv standard selection for Temic 4046 FM5
  18    this value takes the low bits of control byte 2
  19    from datasheet Rev.01, Feb.00
  20      standard     BG      I       L       L2      D
  21      picture IF   38.9    38.9    38.9    33.95   38.9
  22      sound 1      33.4    32.9    32.4    40.45   32.4
  23      sound 2      33.16
  24      NICAM        33.05   32.348  33.05           33.05
  25  */
  26 #define TEMIC_SET_PAL_I         0x05
  27 #define TEMIC_SET_PAL_DK        0x09
  28 #define TEMIC_SET_PAL_L         0x0a // SECAM ?
  29 #define TEMIC_SET_PAL_L2        0x0b // change IF !
  30 #define TEMIC_SET_PAL_BG        0x0c
  31
  32 /* tv tuner system standard selection for Philips FQ1216ME
  33    this value takes the low bits of control byte 2
  34    from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
  35      standard           BG      DK      I       L       L`
  36      picture carrier    38.90   38.90   38.90   38.90   33.95
  37      colour             34.47   34.47   34.47   34.47   38.38
  38      sound 1            33.40   32.40   32.90   32.40   40.45
  39      sound 2            33.16   -       -       -       -
  40      NICAM              33.05   33.05   32.35   33.05   39.80
  41  */
  42 #define PHILIPS_SET_PAL_I       0x01 /* Bit 2 always zero !*/
  43 #define PHILIPS_SET_PAL_BGDK    0x09
  44 #define PHILIPS_SET_PAL_L2      0x0a
  45 #define PHILIPS_SET_PAL_L       0x0b
  46
  47 /* system switching for Philips FI1216MF MK2
  48    from datasheet "1996 Jul 09",
  49     standard         BG     L      L'
  50     picture carrier  38.90  38.90  33.95
  51     colour           34.47  34.37  38.38
  52     sound 1          33.40  32.40  40.45
  53     sound 2          33.16  -      -
  54     NICAM            33.05  33.05  39.80
  55  */
  56 #define PHILIPS_MF_SET_BG       0x01 /* Bit 2 must be zero, Bit 3 is system output */
  57 #define PHILIPS_MF_SET_PAL_L    0x03 // France
  58 #define PHILIPS_MF_SET_PAL_L2   0x02 // L'
  59
  60 /* Control byte */
  61
  62 #define TUNER_RATIO_MASK        0x06 /* Bit cb1:cb2 */
  63 #define TUNER_RATIO_SELECT_50   0x00
  64 #define TUNER_RATIO_SELECT_32   0x02
  65 #define TUNER_RATIO_SELECT_166  0x04
  66 #define TUNER_RATIO_SELECT_62   0x06
  67
  68 #define TUNER_CHARGE_PUMP       0x40  /* Bit cb6 */
  69
  70 /* Status byte */
  71
  72 #define TUNER_POR         0x80
  73 #define TUNER_FL          0x40
  74 #define TUNER_MODE        0x38
  75 #define TUNER_AFC         0x07
  76 #define TUNER_SIGNAL      0x07
  77 #define TUNER_STEREO      0x10
  78
  79 #define TUNER_PLL_LOCKED   0x40
  80 #define TUNER_STEREO_MK3   0x04
  81
  82 /* FIXME:
  83  * Right now, all tuners are using the first tuner_params[] array element
  84  * for analog mode. In the future, we will be merging similar tuner
  85  * definitions together, such that each tuner definition will have a
  86  * tuner_params struct for each available video standard. At that point,
  87  * the tuner_params[] array element will be chosen based on the video
  88  * standard in use.
  89  *
  90  */
  91
  92 /* ---------------------------------------------------------------------- */
  93
  94 static int tuner_getstatus(struct i2c_client *c)
  95 {
  96         unsigned char byte;
  97
  98         if (1 != i2c_master_recv(c,&byte,1))
  99                 return 0;
 100
 101         return byte;
 102 }
 103
 104 static int tuner_signal(struct i2c_client *c)
 105 {
 106         return (tuner_getstatus(c) & TUNER_SIGNAL) << 13;
 107 }
 108
 109 static int tuner_stereo(struct i2c_client *c)
 110 {
 111         int stereo, status;
 112         struct tuner *t = i2c_get_clientdata(c);
 113
 114         status = tuner_getstatus (c);
 115
 116         switch (t->type) {
 117                 case TUNER_PHILIPS_FM1216ME_MK3:
 118                 case TUNER_PHILIPS_FM1236_MK3:
 119                 case TUNER_PHILIPS_FM1256_IH3:
 120                         stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 121                         break;
 122                 default:
 123                         stereo = status & TUNER_STEREO;
 124         }
 125
 126         return stereo;
 127 }
 128
 129
 130 /* ---------------------------------------------------------------------- */
 131
 132 static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
 133 {
 134         struct tuner *t = i2c_get_clientdata(c);
 135         u8 config, cb, tuneraddr;
 136         u16 div;
 137         struct tunertype *tun;
 138         u8 buffer[4];
 139         int rc, IFPCoff, i, j;
 140         enum param_type desired_type;
 141
 142         tun = &tuners[t->type];
 143
 144         /* IFPCoff = Video Intermediate Frequency - Vif:
 145                 940  =16*58.75  NTSC/J (Japan)
 146                 732  =16*45.75  M/N STD
 147                 704  =16*44     ATSC (at DVB code)
 148                 632  =16*39.50  I U.K.
 149                 622.4=16*38.90  B/G D/K I, L STD
 150                 592  =16*37.00  D China
 151                 590  =16.36.875 B Australia
 152                 543.2=16*33.95  L' STD
 153                 171.2=16*10.70  FM Radio (at set_radio_freq)
 154         */
 155
 156         if (t->std == V4L2_STD_NTSC_M_JP) {
 157                 IFPCoff      = 940;
 158                 desired_type = TUNER_PARAM_TYPE_NTSC;
 159         } else if ((t->std & V4L2_STD_MN) &&
 160                   !(t->std & ~V4L2_STD_MN)) {
 161                 IFPCoff      = 732;
 162                 desired_type = TUNER_PARAM_TYPE_NTSC;
 163         } else if (t->std == V4L2_STD_SECAM_LC) {
 164                 IFPCoff      = 543;
 165                 desired_type = TUNER_PARAM_TYPE_SECAM;
 166         } else {
 167                 IFPCoff      = 623;
 168                 desired_type = TUNER_PARAM_TYPE_PAL;
 169         }
 170
 171         for (j = 0; j < tun->count-1; j++) {
 172                 if (desired_type != tun->params[j].type)
 173                         continue;
 174                 break;
 175         }
 176         for (i = 0; i < tun->params[j].count; i++) {
 177                 if (freq > tun->params[j].ranges[i].limit)
 178                         continue;
 179                 break;
 180         }
 181         if (i == tun->params[j].count) {
 182                 tuner_dbg("TV frequency out of range (%d > %d)",
 183                                 freq, tun->params[j].ranges[i - 1].limit);
 184                 freq = tun->params[j].ranges[--i].limit;
 185         }
 186         config = tun->params[j].ranges[i].config;
 187         cb     = tun->params[j].ranges[i].cb;
 188         /*  i == 0 -> VHF_LO
 189          *  i == 1 -> VHF_HI
 190          *  i == 2 -> UHF     */
 191         tuner_dbg("tv: range %d\n",i);
 192
 193         div=freq + IFPCoff + offset;
 194
 195         tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 196                                         freq / 16, freq % 16 * 100 / 16,
 197                                         IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 198                                         offset / 16, offset % 16 * 100 / 16,
 199                                         div);
 200
 201         /* tv norm specific stuff for multi-norm tuners */
 202         switch (t->type) {
 203         case TUNER_PHILIPS_SECAM: // FI1216MF
 204                 /* 0x01 -> ??? no change ??? */
 205                 /* 0x02 -> PAL BDGHI / SECAM L */
 206                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 207                 cb &= ~0x02;
 208                 if (t->std & V4L2_STD_SECAM)
 209                         cb |= 0x02;
 210                 break;
 211
 212         case TUNER_TEMIC_4046FM5:
 213                 cb &= ~0x0f;
 214
 215                 if (t->std & V4L2_STD_PAL_BG) {
 216                         cb |= TEMIC_SET_PAL_BG;
 217
 218                 } else if (t->std & V4L2_STD_PAL_I) {
 219                         cb |= TEMIC_SET_PAL_I;
 220
 221                 } else if (t->std & V4L2_STD_PAL_DK) {
 222                         cb |= TEMIC_SET_PAL_DK;
 223
 224                 } else if (t->std & V4L2_STD_SECAM_L) {
 225                         cb |= TEMIC_SET_PAL_L;
 226
 227                 }
 228                 break;
 229
 230         case TUNER_PHILIPS_FQ1216ME:
 231                 cb &= ~0x0f;
 232
 233                 if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 234                         cb |= PHILIPS_SET_PAL_BGDK;
 235
 236                 } else if (t->std & V4L2_STD_PAL_I) {
 237                         cb |= PHILIPS_SET_PAL_I;
 238
 239                 } else if (t->std & V4L2_STD_SECAM_L) {
 240                         cb |= PHILIPS_SET_PAL_L;
 241
 242                 }
 243                 break;
 244
 245         case TUNER_PHILIPS_ATSC:
 246                 /* 0x00 -> ATSC antenna input 1 */
 247                 /* 0x01 -> ATSC antenna input 2 */
 248                 /* 0x02 -> NTSC antenna input 1 */
 249                 /* 0x03 -> NTSC antenna input 2 */
 250                 cb &= ~0x03;
 251                 if (!(t->std & V4L2_STD_ATSC))
 252                         cb |= 2;
 253                 /* FIXME: input */
 254                 break;
 255
 256         case TUNER_MICROTUNE_4042FI5:
 257                 /* Set the charge pump for fast tuning */
 258                 config |= TUNER_CHARGE_PUMP;
 259                 break;
 260
 261         case TUNER_PHILIPS_TUV1236D:
 262                 /* 0x40 -> ATSC antenna input 1 */
 263                 /* 0x48 -> ATSC antenna input 2 */
 264                 /* 0x00 -> NTSC antenna input 1 */
 265                 /* 0x08 -> NTSC antenna input 2 */
 266                 buffer[0] = 0x14;
 267                 buffer[1] = 0x00;
 268                 buffer[2] = 0x17;
 269                 buffer[3] = 0x00;
 270                 cb &= ~0x40;
 271                 if (t->std & V4L2_STD_ATSC) {
 272                         cb |= 0x40;
 273                         buffer[1] = 0x04;
 274                 }
 275                 /* set to the correct mode (analog or digital) */
 276                 tuneraddr = c->addr;
 277                 c->addr = 0x0a;
 278                 if (2 != (rc = i2c_master_send(c,&buffer[0],2)))
 279                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 280                 if (2 != (rc = i2c_master_send(c,&buffer[2],2)))
 281                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 282                 c->addr = tuneraddr;
 283                 /* FIXME: input */
 284                 break;
 285         }
 286
 287         if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) {
 288                 buffer[0] = config;
 289                 buffer[1] = cb;
 290                 buffer[2] = (div>>8) & 0x7f;
 291                 buffer[3] = div      & 0xff;
 292         } else {
 293                 buffer[0] = (div>>8) & 0x7f;
 294                 buffer[1] = div      & 0xff;
 295                 buffer[2] = config;
 296                 buffer[3] = cb;
 297         }
 298         t->last_div = div;
 299         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 300                   buffer[0],buffer[1],buffer[2],buffer[3]);
 301
 302         if (4 != (rc = i2c_master_send(c,buffer,4)))
 303                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 304
 305         if (t->type == TUNER_MICROTUNE_4042FI5) {
 306                 // FIXME - this may also work for other tuners
 307                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 308                 u8 status_byte = 0;
 309
 310                 /* Wait until the PLL locks */
 311                 for (;;) {
 312                         if (time_after(jiffies,timeout))
 313                                 return;
 314                         if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
 315                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 316                                 break;
 317                         }
 318                         if (status_byte & TUNER_PLL_LOCKED)
 319                                 break;
 320                         udelay(10);
 321                 }
 322
 323                 /* Set the charge pump for optimized phase noise figure */
 324                 config &= ~TUNER_CHARGE_PUMP;
 325                 buffer[0] = (div>>8) & 0x7f;
 326                 buffer[1] = div      & 0xff;
 327                 buffer[2] = config;
 328                 buffer[3] = cb;
 329                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 330                        buffer[0],buffer[1],buffer[2],buffer[3]);
 331
 332                 if (4 != (rc = i2c_master_send(c,buffer,4)))
 333                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 334         }
 335 }
 336
 337 static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
 338 {
 339         struct tunertype *tun;
 340         struct tuner *t = i2c_get_clientdata(c);
 341         u8 buffer[4];
 342         u16 div;
 343         int rc, j;
 344         enum param_type desired_type = TUNER_PARAM_TYPE_RADIO;
 345
 346         tun = &tuners[t->type];
 347
 348         for (j = 0; j < tun->count-1; j++) {
 349                 if (desired_type != tun->params[j].type)
 350                         continue;
 351                 break;
 352         }
 353
 354         div = (20 * freq / 16000) + (int)(20*10.7); /* IF 10.7 MHz */
 355         buffer[2] = (tun->params[j].ranges[0].config & ~TUNER_RATIO_MASK) | TUNER_RATIO_SELECT_50; /* 50 kHz step */
 356
 357         switch (t->type) {
 358         case TUNER_TENA_9533_DI:
 359         case TUNER_YMEC_TVF_5533MF:
 360                 tuner_dbg ("This tuner doesn't have FM. Most cards has a TEA5767 for FM\n");
 361                 return;
 362         case TUNER_PHILIPS_FM1216ME_MK3:
 363         case TUNER_PHILIPS_FM1236_MK3:
 364         case TUNER_PHILIPS_FMD1216ME_MK3:
 365                 buffer[3] = 0x19;
 366                 break;
 367         case TUNER_PHILIPS_FM1256_IH3:
 368                 div = (20 * freq) / 16000 + (int)(33.3 * 20);  /* IF 33.3 MHz */
 369                 buffer[3] = 0x19;
 370                 break;
 371         case TUNER_LG_PAL_FM:
 372                 buffer[3] = 0xa5;
 373                 break;
 374         case TUNER_MICROTUNE_4049FM5:
 375                 div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
 376                 buffer[3] = 0xa4;
 377                 break;
 378         default:
 379                 buffer[3] = 0xa4;
 380                 break;
 381         }
 382         buffer[0] = (div>>8) & 0x7f;
 383         buffer[1] = div      & 0xff;
 384         if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) {
 385                 buffer[0] = buffer[2];
 386                 buffer[1] = buffer[3];
 387                 buffer[2] = (div>>8) & 0x7f;
 388                 buffer[3] = div      & 0xff;
 389         } else {
 390                 buffer[0] = (div>>8) & 0x7f;
 391                 buffer[1] = div      & 0xff;
 392         }
 393
 394         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 395                buffer[0],buffer[1],buffer[2],buffer[3]);
 396         t->last_div = div;
 397
 398         if (4 != (rc = i2c_master_send(c,buffer,4)))
 399                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 400 }
 401
 402 int default_tuner_init(struct i2c_client *c)
 403 {
 404         struct tuner *t = i2c_get_clientdata(c);
 405
 406         tuner_info("type set to %d (%s)\n",
 407                    t->type, tuners[t->type].name);
 408         strlcpy(c->name, tuners[t->type].name, sizeof(c->name));
 409
 410         t->set_tv_freq = default_set_tv_freq;
 411         t->set_radio_freq = default_set_radio_freq;
 412         t->has_signal = tuner_signal;
 413         t->is_stereo = tuner_stereo;
 414         t->standby = NULL;
 415
 416         return 0;
 417 }
 418
 419 /*
 420  * Overrides for Emacs so that we follow Linus's tabbing style.
 421  * ---------------------------------------------------------------------------
 422  * Local variables:
 423  * c-basic-offset: 8
 424  * End:
 425  */