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 #define TUNER_PARAM_ANALOG 0  /* to be removed */
  83 /* FIXME:
  84  * Right now, all tuners are using the first tuner_params[] array element
  85  * for analog mode. In the future, we will be merging similar tuner
  86  * definitions together, such that each tuner definition will have a
  87  * tuner_params struct for each available video standard. At that point,
  88  * TUNER_PARAM_ANALOG will be removed, and the tuner_params[] array
  89  * element will be chosen based on the video standard in use.
  90  *
  91  */
  92
  93 /* ---------------------------------------------------------------------- */
  94
  95 static int tuner_getstatus(struct i2c_client *c)
  96 {
  97         unsigned char byte;
  98
  99         if (1 != i2c_master_recv(c,&byte,1))
 100                 return 0;
 101
 102         return byte;
 103 }
 104
 105 static int tuner_signal(struct i2c_client *c)
 106 {
 107         return (tuner_getstatus(c) & TUNER_SIGNAL) << 13;
 108 }
 109
 110 static int tuner_stereo(struct i2c_client *c)
 111 {
 112         int stereo, status;
 113         struct tuner *t = i2c_get_clientdata(c);
 114
 115         status = tuner_getstatus (c);
 116
 117         switch (t->type) {
 118                 case TUNER_PHILIPS_FM1216ME_MK3:
 119                 case TUNER_PHILIPS_FM1236_MK3:
 120                 case TUNER_PHILIPS_FM1256_IH3:
 121                         stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 122                         break;
 123                 default:
 124                         stereo = status & TUNER_STEREO;
 125         }
 126
 127         return stereo;
 128 }
 129
 130
 131 /* ---------------------------------------------------------------------- */
 132
 133 static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
 134 {
 135         struct tuner *t = i2c_get_clientdata(c);
 136         u8 config, tuneraddr;
 137         u16 div;
 138         struct tunertype *tun;
 139         unsigned char buffer[4];
 140         int rc, IFPCoff, i, j;
 141
 142         tun = &tuners[t->type];
 143         j = TUNER_PARAM_ANALOG;
 144
 145         for (i = 0; i < tun->params[j].count; i++) {
 146                 if (freq > tun->params[j].ranges[i].limit)
 147                         continue;
 148                 break;
 149         }
 150         config = tun->params[j].ranges[i].cb;
 151         /*  i == 0 -> VHF_LO  */
 152         /*  i == 1 -> VHF_HI  */
 153         /*  i == 2 -> UHF     */
 154         tuner_dbg("tv: range %d\n",i);
 155
 156         /* tv norm specific stuff for multi-norm tuners */
 157         switch (t->type) {
 158         case TUNER_PHILIPS_SECAM: // FI1216MF
 159                 /* 0x01 -> ??? no change ??? */
 160                 /* 0x02 -> PAL BDGHI / SECAM L */
 161                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 162                 config &= ~0x02;
 163                 if (t->std & V4L2_STD_SECAM)
 164                         config |= 0x02;
 165                 break;
 166
 167         case TUNER_TEMIC_4046FM5:
 168                 config &= ~0x0f;
 169
 170                 if (t->std & V4L2_STD_PAL_BG) {
 171                         config |= TEMIC_SET_PAL_BG;
 172
 173                 } else if (t->std & V4L2_STD_PAL_I) {
 174                         config |= TEMIC_SET_PAL_I;
 175
 176                 } else if (t->std & V4L2_STD_PAL_DK) {
 177                         config |= TEMIC_SET_PAL_DK;
 178
 179                 } else if (t->std & V4L2_STD_SECAM_L) {
 180                         config |= TEMIC_SET_PAL_L;
 181
 182                 }
 183                 break;
 184
 185         case TUNER_PHILIPS_FQ1216ME:
 186                 config &= ~0x0f;
 187
 188                 if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 189                         config |= PHILIPS_SET_PAL_BGDK;
 190
 191                 } else if (t->std & V4L2_STD_PAL_I) {
 192                         config |= PHILIPS_SET_PAL_I;
 193
 194                 } else if (t->std & V4L2_STD_SECAM_L) {
 195                         config |= PHILIPS_SET_PAL_L;
 196
 197                 }
 198                 break;
 199
 200         case TUNER_PHILIPS_ATSC:
 201                 /* 0x00 -> ATSC antenna input 1 */
 202                 /* 0x01 -> ATSC antenna input 2 */
 203                 /* 0x02 -> NTSC antenna input 1 */
 204                 /* 0x03 -> NTSC antenna input 2 */
 205                 config &= ~0x03;
 206                 if (!(t->std & V4L2_STD_ATSC))
 207                         config |= 2;
 208                 /* FIXME: input */
 209                 break;
 210
 211         case TUNER_MICROTUNE_4042FI5:
 212                 /* Set the charge pump for fast tuning */
 213                 tun->params[j].config |= TUNER_CHARGE_PUMP;
 214                 break;
 215
 216         case TUNER_PHILIPS_TUV1236D:
 217                 /* 0x40 -> ATSC antenna input 1 */
 218                 /* 0x48 -> ATSC antenna input 2 */
 219                 /* 0x00 -> NTSC antenna input 1 */
 220                 /* 0x08 -> NTSC antenna input 2 */
 221                 buffer[0] = 0x14;
 222                 buffer[1] = 0x00;
 223                 buffer[2] = 0x17;
 224                 buffer[3] = 0x00;
 225                 config &= ~0x40;
 226                 if (t->std & V4L2_STD_ATSC) {
 227                         config |= 0x40;
 228                         buffer[1] = 0x04;
 229                 }
 230                 /* set to the correct mode (analog or digital) */
 231                 tuneraddr = c->addr;
 232                 c->addr = 0x0a;
 233                 if (2 != (rc = i2c_master_send(c,&buffer[0],2)))
 234                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 235                 if (2 != (rc = i2c_master_send(c,&buffer[2],2)))
 236                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 237                 c->addr = tuneraddr;
 238                 /* FIXME: input */
 239                 break;
 240         }
 241
 242         /*
 243          * Philips FI1216MK2 remark from specification :
 244          * for channel selection involving band switching, and to ensure
 245          * smooth tuning to the desired channel without causing
 246          * unnecessary charge pump action, it is recommended to consider
 247          * the difference between wanted channel frequency and the
 248          * current channel frequency.  Unnecessary charge pump action
 249          * will result in very low tuning voltage which may drive the
 250          * oscillator to extreme conditions.
 251          *
 252          * Progfou: specification says to send config data before
 253          * frequency in case (wanted frequency < current frequency).
 254          */
 255
 256         /* IFPCoff = Video Intermediate Frequency - Vif:
 257                 940  =16*58.75  NTSC/J (Japan)
 258                 732  =16*45.75  M/N STD
 259                 704  =16*44     ATSC (at DVB code)
 260                 632  =16*39.50  I U.K.
 261                 622.4=16*38.90  B/G D/K I, L STD
 262                 592  =16*37.00  D China
 263                 590  =16.36.875 B Australia
 264                 543.2=16*33.95  L' STD
 265                 171.2=16*10.70  FM Radio (at set_radio_freq)
 266         */
 267
 268         if (t->std == V4L2_STD_NTSC_M_JP) {
 269                 IFPCoff = 940;
 270         } else if ((t->std & V4L2_STD_MN) &&
 271                   !(t->std & ~V4L2_STD_MN)) {
 272                 IFPCoff = 732;
 273         } else if (t->std == V4L2_STD_SECAM_LC) {
 274                 IFPCoff = 543;
 275         } else {
 276                 IFPCoff = 623;
 277         }
 278
 279         div=freq + IFPCoff + offset;
 280
 281         tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 282                                         freq / 16, freq % 16 * 100 / 16,
 283                                         IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 284                                         offset / 16, offset % 16 * 100 / 16,
 285                                         div);
 286
 287         if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) {
 288                 buffer[0] = tun->params[j].config;
 289                 buffer[1] = config;
 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] = tun->params[j].config;
 296                 buffer[3] = config;
 297         }
 298         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 299                   buffer[0],buffer[1],buffer[2],buffer[3]);
 300
 301         if (4 != (rc = i2c_master_send(c,buffer,4)))
 302                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 303
 304         if (t->type == TUNER_MICROTUNE_4042FI5) {
 305                 // FIXME - this may also work for other tuners
 306                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 307                 u8 status_byte = 0;
 308
 309                 /* Wait until the PLL locks */
 310                 for (;;) {
 311                         if (time_after(jiffies,timeout))
 312                                 return;
 313                         if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
 314                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 315                                 break;
 316                         }
 317                         if (status_byte & TUNER_PLL_LOCKED)
 318                                 break;
 319                         udelay(10);
 320                 }
 321
 322                 /* Set the charge pump for optimized phase noise figure */
 323                 tun->params[j].config &= ~TUNER_CHARGE_PUMP;
 324                 buffer[0] = (div>>8) & 0x7f;
 325                 buffer[1] = div      & 0xff;
 326                 buffer[2] = tun->params[j].config;
 327                 buffer[3] = config;
 328                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 329                        buffer[0],buffer[1],buffer[2],buffer[3]);
 330
 331                 if (4 != (rc = i2c_master_send(c,buffer,4)))
 332                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 333         }
 334 }
 335
 336 static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
 337 {
 338         struct tunertype *tun;
 339         struct tuner *t = i2c_get_clientdata(c);
 340         unsigned char buffer[4];
 341         unsigned div;
 342         int rc, j;
 343
 344         tun = &tuners[t->type];
 345         j = TUNER_PARAM_ANALOG;
 346
 347         div = (20 * freq / 16000) + (int)(20*10.7); /* IF 10.7 MHz */
 348         buffer[2] = (tun->params[j].config & ~TUNER_RATIO_MASK) | TUNER_RATIO_SELECT_50; /* 50 kHz step */
 349
 350         switch (t->type) {
 351         case TUNER_TENA_9533_DI:
 352         case TUNER_YMEC_TVF_5533MF:
 353                 tuner_dbg ("This tuner doesn't have FM. Most cards has a TEA5767 for FM\n");
 354                 return;
 355         case TUNER_PHILIPS_FM1216ME_MK3:
 356         case TUNER_PHILIPS_FM1236_MK3:
 357         case TUNER_PHILIPS_FMD1216ME_MK3:
 358                 buffer[3] = 0x19;
 359                 break;
 360         case TUNER_PHILIPS_FM1256_IH3:
 361                 div = (20 * freq) / 16000 + (int)(33.3 * 20);  /* IF 33.3 MHz */
 362                 buffer[3] = 0x19;
 363                 break;
 364         case TUNER_LG_PAL_FM:
 365                 buffer[3] = 0xa5;
 366                 break;
 367         case TUNER_MICROTUNE_4049FM5:
 368                 div = (20 * freq) / 16000 + (int)(33.3 * 20); /* IF 33.3 MHz */
 369                 buffer[3] = 0xa4;
 370                 break;
 371         default:
 372                 buffer[3] = 0xa4;
 373                 break;
 374         }
 375         buffer[0] = (div>>8) & 0x7f;
 376         buffer[1] = div      & 0xff;
 377
 378         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 379                buffer[0],buffer[1],buffer[2],buffer[3]);
 380
 381         if (4 != (rc = i2c_master_send(c,buffer,4)))
 382                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 383 }
 384
 385 int default_tuner_init(struct i2c_client *c)
 386 {
 387         struct tuner *t = i2c_get_clientdata(c);
 388
 389         tuner_info("type set to %d (%s)\n",
 390                    t->type, tuners[t->type].name);
 391         strlcpy(c->name, tuners[t->type].name, sizeof(c->name));
 392
 393         t->tv_freq    = default_set_tv_freq;
 394         t->radio_freq = default_set_radio_freq;
 395         t->has_signal = tuner_signal;
 396         t->is_stereo  = tuner_stereo;
 397         t->standby = NULL;
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * Overrides for Emacs so that we follow Linus's tabbing style.
 404  * ---------------------------------------------------------------------------
 405  * Local variables:
 406  * c-basic-offset: 8
 407  * End:
 408  */