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 /* ---------------------------------------------------------------------- */
  83
  84 static int tuner_getstatus(struct i2c_client *c)
  85 {
  86         unsigned char byte;
  87
  88         if (1 != i2c_master_recv(c,&byte,1))
  89                 return 0;
  90
  91         return byte;
  92 }
  93
  94 static int tuner_signal(struct i2c_client *c)
  95 {
  96         return (tuner_getstatus(c) & TUNER_SIGNAL) << 13;
  97 }
  98
  99 static int tuner_stereo(struct i2c_client *c)
 100 {
 101         int stereo, status;
 102         struct tuner *t = i2c_get_clientdata(c);
 103
 104         status = tuner_getstatus (c);
 105
 106         switch (t->type) {
 107                 case TUNER_PHILIPS_FM1216ME_MK3:
 108                 case TUNER_PHILIPS_FM1236_MK3:
 109                 case TUNER_PHILIPS_FM1256_IH3:
 110                         stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 111                         break;
 112                 default:
 113                         stereo = status & TUNER_STEREO;
 114         }
 115
 116         return stereo;
 117 }
 118
 119
 120 /* ---------------------------------------------------------------------- */
 121
 122 static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
 123 {
 124         struct tuner *t = i2c_get_clientdata(c);
 125         u8 config, cb, tuneraddr;
 126         u16 div;
 127         struct tunertype *tun;
 128         u8 buffer[4];
 129         int rc, IFPCoff, i, j;
 130         enum param_type desired_type;
 131
 132         tun = &tuners[t->type];
 133
 134         /* IFPCoff = Video Intermediate Frequency - Vif:
 135                 940  =16*58.75  NTSC/J (Japan)
 136                 732  =16*45.75  M/N STD
 137                 704  =16*44     ATSC (at DVB code)
 138                 632  =16*39.50  I U.K.
 139                 622.4=16*38.90  B/G D/K I, L STD
 140                 592  =16*37.00  D China
 141                 590  =16.36.875 B Australia
 142                 543.2=16*33.95  L' STD
 143                 171.2=16*10.70  FM Radio (at set_radio_freq)
 144         */
 145
 146         if (t->std == V4L2_STD_NTSC_M_JP) {
 147                 IFPCoff      = 940;
 148                 desired_type = TUNER_PARAM_TYPE_NTSC;
 149         } else if ((t->std & V4L2_STD_MN) &&
 150                   !(t->std & ~V4L2_STD_MN)) {
 151                 IFPCoff      = 732;
 152                 desired_type = TUNER_PARAM_TYPE_NTSC;
 153         } else if (t->std == V4L2_STD_SECAM_LC) {
 154                 IFPCoff      = 543;
 155                 desired_type = TUNER_PARAM_TYPE_SECAM;
 156         } else {
 157                 IFPCoff      = 623;
 158                 desired_type = TUNER_PARAM_TYPE_PAL;
 159         }
 160
 161         for (j = 0; j < tun->count-1; j++) {
 162                 if (desired_type != tun->params[j].type)
 163                         continue;
 164                 break;
 165         }
 166         for (i = 0; i < tun->params[j].count; i++) {
 167                 if (freq > tun->params[j].ranges[i].limit)
 168                         continue;
 169                 break;
 170         }
 171         if (i == tun->params[j].count) {
 172                 tuner_dbg("TV frequency out of range (%d > %d)",
 173                                 freq, tun->params[j].ranges[i - 1].limit);
 174                 freq = tun->params[j].ranges[--i].limit;
 175         }
 176         config = tun->params[j].ranges[i].config;
 177         cb     = tun->params[j].ranges[i].cb;
 178         /*  i == 0 -> VHF_LO
 179          *  i == 1 -> VHF_HI
 180          *  i == 2 -> UHF     */
 181         tuner_dbg("tv: param %d, range %d\n",j,i);
 182
 183         div=freq + IFPCoff + offset;
 184
 185         tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 186                                         freq / 16, freq % 16 * 100 / 16,
 187                                         IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 188                                         offset / 16, offset % 16 * 100 / 16,
 189                                         div);
 190
 191         /* tv norm specific stuff for multi-norm tuners */
 192         switch (t->type) {
 193         case TUNER_PHILIPS_SECAM: // FI1216MF
 194                 /* 0x01 -> ??? no change ??? */
 195                 /* 0x02 -> PAL BDGHI / SECAM L */
 196                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 197                 cb &= ~0x02;
 198                 if (t->std & V4L2_STD_SECAM)
 199                         cb |= 0x02;
 200                 break;
 201
 202         case TUNER_TEMIC_4046FM5:
 203                 cb &= ~0x0f;
 204
 205                 if (t->std & V4L2_STD_PAL_BG) {
 206                         cb |= TEMIC_SET_PAL_BG;
 207
 208                 } else if (t->std & V4L2_STD_PAL_I) {
 209                         cb |= TEMIC_SET_PAL_I;
 210
 211                 } else if (t->std & V4L2_STD_PAL_DK) {
 212                         cb |= TEMIC_SET_PAL_DK;
 213
 214                 } else if (t->std & V4L2_STD_SECAM_L) {
 215                         cb |= TEMIC_SET_PAL_L;
 216
 217                 }
 218                 break;
 219
 220         case TUNER_PHILIPS_FQ1216ME:
 221                 cb &= ~0x0f;
 222
 223                 if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 224                         cb |= PHILIPS_SET_PAL_BGDK;
 225
 226                 } else if (t->std & V4L2_STD_PAL_I) {
 227                         cb |= PHILIPS_SET_PAL_I;
 228
 229                 } else if (t->std & V4L2_STD_SECAM_L) {
 230                         cb |= PHILIPS_SET_PAL_L;
 231
 232                 }
 233                 break;
 234
 235         case TUNER_PHILIPS_ATSC:
 236                 /* 0x00 -> ATSC antenna input 1 */
 237                 /* 0x01 -> ATSC antenna input 2 */
 238                 /* 0x02 -> NTSC antenna input 1 */
 239                 /* 0x03 -> NTSC antenna input 2 */
 240                 cb &= ~0x03;
 241                 if (!(t->std & V4L2_STD_ATSC))
 242                         cb |= 2;
 243                 /* FIXME: input */
 244                 break;
 245
 246         case TUNER_MICROTUNE_4042FI5:
 247                 /* Set the charge pump for fast tuning */
 248                 config |= TUNER_CHARGE_PUMP;
 249                 break;
 250
 251         case TUNER_PHILIPS_TUV1236D:
 252                 /* 0x40 -> ATSC antenna input 1 */
 253                 /* 0x48 -> ATSC antenna input 2 */
 254                 /* 0x00 -> NTSC antenna input 1 */
 255                 /* 0x08 -> NTSC antenna input 2 */
 256                 buffer[0] = 0x14;
 257                 buffer[1] = 0x00;
 258                 buffer[2] = 0x17;
 259                 buffer[3] = 0x00;
 260                 cb &= ~0x40;
 261                 if (t->std & V4L2_STD_ATSC) {
 262                         cb |= 0x40;
 263                         buffer[1] = 0x04;
 264                 }
 265                 /* set to the correct mode (analog or digital) */
 266                 tuneraddr = c->addr;
 267                 c->addr = 0x0a;
 268                 if (2 != (rc = i2c_master_send(c,&buffer[0],2)))
 269                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 270                 if (2 != (rc = i2c_master_send(c,&buffer[2],2)))
 271                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 272                 c->addr = tuneraddr;
 273                 /* FIXME: input */
 274                 break;
 275         }
 276
 277         if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) {
 278                 buffer[0] = config;
 279                 buffer[1] = cb;
 280                 buffer[2] = (div>>8) & 0x7f;
 281                 buffer[3] = div      & 0xff;
 282         } else {
 283                 buffer[0] = (div>>8) & 0x7f;
 284                 buffer[1] = div      & 0xff;
 285                 buffer[2] = config;
 286                 buffer[3] = cb;
 287         }
 288         t->last_div = div;
 289         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 290                   buffer[0],buffer[1],buffer[2],buffer[3]);
 291
 292         if (4 != (rc = i2c_master_send(c,buffer,4)))
 293                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 294
 295         if (t->type == TUNER_MICROTUNE_4042FI5) {
 296                 // FIXME - this may also work for other tuners
 297                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 298                 u8 status_byte = 0;
 299
 300                 /* Wait until the PLL locks */
 301                 for (;;) {
 302                         if (time_after(jiffies,timeout))
 303                                 return;
 304                         if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
 305                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 306                                 break;
 307                         }
 308                         if (status_byte & TUNER_PLL_LOCKED)
 309                                 break;
 310                         udelay(10);
 311                 }
 312
 313                 /* Set the charge pump for optimized phase noise figure */
 314                 config &= ~TUNER_CHARGE_PUMP;
 315                 buffer[0] = (div>>8) & 0x7f;
 316                 buffer[1] = div      & 0xff;
 317                 buffer[2] = config;
 318                 buffer[3] = cb;
 319                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 320                        buffer[0],buffer[1],buffer[2],buffer[3]);
 321
 322                 if (4 != (rc = i2c_master_send(c,buffer,4)))
 323                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 324         }
 325 }
 326
 327 static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
 328 {
 329         struct tunertype *tun;
 330         struct tuner *t = i2c_get_clientdata(c);
 331         u8 buffer[4];
 332         u16 div;
 333         int rc, j;
 334         enum param_type desired_type = TUNER_PARAM_TYPE_RADIO;
 335
 336         tun = &tuners[t->type];
 337
 338         for (j = 0; j < tun->count-1; j++) {
 339                 if (desired_type != tun->params[j].type)
 340                         continue;
 341                 break;
 342         }
 343
 344         div = (20 * freq / 16000) + (int)(20*10.7); /* IF 10.7 MHz */
 345         buffer[2] = (tun->params[j].ranges[0].config & ~TUNER_RATIO_MASK) | TUNER_RATIO_SELECT_50; /* 50 kHz step */
 346
 347         switch (t->type) {
 348         case TUNER_TENA_9533_DI:
 349         case TUNER_YMEC_TVF_5533MF:
 350                 tuner_dbg ("This tuner doesn't have FM. Most cards has a TEA5767 for FM\n");
 351                 return;
 352         case TUNER_PHILIPS_FM1216ME_MK3:
 353         case TUNER_PHILIPS_FM1236_MK3:
 354         case TUNER_PHILIPS_FMD1216ME_MK3:
 355                 buffer[3] = 0x19;
 356                 break;
 357         case TUNER_PHILIPS_FM1256_IH3:
 358                 div = (20 * freq) / 16000 + (int)(33.3 * 20);  /* IF 33.3 MHz */
 359                 buffer[3] = 0x19;
 360                 break;
 361         case TUNER_LG_PAL_FM:
 362                 buffer[3] = 0xa5;
 363                 break;
 364         case TUNER_MICROTUNE_4049FM5:
 365                 div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
 366                 buffer[3] = 0xa4;
 367                 break;
 368         default:
 369                 buffer[3] = 0xa4;
 370                 break;
 371         }
 372         buffer[0] = (div>>8) & 0x7f;
 373         buffer[1] = div      & 0xff;
 374         if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) {
 375                 buffer[0] = buffer[2];
 376                 buffer[1] = buffer[3];
 377                 buffer[2] = (div>>8) & 0x7f;
 378                 buffer[3] = div      & 0xff;
 379         } else {
 380                 buffer[0] = (div>>8) & 0x7f;
 381                 buffer[1] = div      & 0xff;
 382         }
 383
 384         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 385                buffer[0],buffer[1],buffer[2],buffer[3]);
 386         t->last_div = div;
 387
 388         if (4 != (rc = i2c_master_send(c,buffer,4)))
 389                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 390 }
 391
 392 int default_tuner_init(struct i2c_client *c)
 393 {
 394         struct tuner *t = i2c_get_clientdata(c);
 395
 396         tuner_info("type set to %d (%s)\n",
 397                    t->type, tuners[t->type].name);
 398         strlcpy(c->name, tuners[t->type].name, sizeof(c->name));
 399
 400         t->set_tv_freq = default_set_tv_freq;
 401         t->set_radio_freq = default_set_radio_freq;
 402         t->has_signal = tuner_signal;
 403         t->is_stereo = tuner_stereo;
 404         t->standby = NULL;
 405
 406         return 0;
 407 }
 408
 409 /*
 410  * Overrides for Emacs so that we follow Linus's tabbing style.
 411  * ---------------------------------------------------------------------------
 412  * Local variables:
 413  * c-basic-offset: 8
 414  * End:
 415  */