err.no Git - linux-2.6/blob - drivers/media/video/tuner-simple.c

   1 /*
   2  * $Id: tuner-simple.c,v 1.14 2005/05/30 02:02:47 mchehab Exp $
   3  *
   4  * i2c tv tuner chip device driver
   5  * controls all those simple 4-control-bytes style tuners.
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/i2c.h>
   9 #include <linux/videodev.h>
  10 #include <media/tuner.h>
  11
  12 /* ---------------------------------------------------------------------- */
  13
  14 /* tv standard selection for Temic 4046 FM5
  15    this value takes the low bits of control byte 2
  16    from datasheet Rev.01, Feb.00
  17      standard     BG      I       L       L2      D
  18      picture IF   38.9    38.9    38.9    33.95   38.9
  19      sound 1      33.4    32.9    32.4    40.45   32.4
  20      sound 2      33.16
  21      NICAM        33.05   32.348  33.05           33.05
  22  */
  23 #define TEMIC_SET_PAL_I         0x05
  24 #define TEMIC_SET_PAL_DK        0x09
  25 #define TEMIC_SET_PAL_L         0x0a // SECAM ?
  26 #define TEMIC_SET_PAL_L2        0x0b // change IF !
  27 #define TEMIC_SET_PAL_BG        0x0c
  28
  29 /* tv tuner system standard selection for Philips FQ1216ME
  30    this value takes the low bits of control byte 2
  31    from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
  32      standard           BG      DK      I       L       L`
  33      picture carrier    38.90   38.90   38.90   38.90   33.95
  34      colour             34.47   34.47   34.47   34.47   38.38
  35      sound 1            33.40   32.40   32.90   32.40   40.45
  36      sound 2            33.16   -       -       -       -
  37      NICAM              33.05   33.05   32.35   33.05   39.80
  38  */
  39 #define PHILIPS_SET_PAL_I       0x01 /* Bit 2 always zero !*/
  40 #define PHILIPS_SET_PAL_BGDK    0x09
  41 #define PHILIPS_SET_PAL_L2      0x0a
  42 #define PHILIPS_SET_PAL_L       0x0b
  43
  44 /* system switching for Philips FI1216MF MK2
  45    from datasheet "1996 Jul 09",
  46     standard         BG     L      L'
  47     picture carrier  38.90  38.90  33.95
  48     colour           34.47  34.37  38.38
  49     sound 1          33.40  32.40  40.45
  50     sound 2          33.16  -      -
  51     NICAM            33.05  33.05  39.80
  52  */
  53 #define PHILIPS_MF_SET_BG       0x01 /* Bit 2 must be zero, Bit 3 is system output */
  54 #define PHILIPS_MF_SET_PAL_L    0x03 // France
  55 #define PHILIPS_MF_SET_PAL_L2   0x02 // L'
  56
  57
  58 /* ---------------------------------------------------------------------- */
  59
  60 struct tunertype
  61 {
  62         char *name;
  63         unsigned char Vendor;
  64         unsigned char Type;
  65
  66         unsigned short thresh1;  /*  band switch VHF_LO <=> VHF_HI  */
  67         unsigned short thresh2;  /*  band switch VHF_HI <=> UHF     */
  68         unsigned char VHF_L;
  69         unsigned char VHF_H;
  70         unsigned char UHF;
  71         unsigned char config;
  72         unsigned short IFPCoff; /* 622.4=16*38.90 MHz PAL,
  73                                    732  =16*45.75 NTSCi,
  74                                    940  =16*58.75 NTSC-Japan
  75                                    704  =16*44    ATSC */
  76 };
  77
  78 /*
  79  *      The floats in the tuner struct are computed at compile time
  80  *      by gcc and cast back to integers. Thus we don't violate the
  81  *      "no float in kernel" rule.
  82  */
  83 static struct tunertype tuners[] = {
  84         { "Temic PAL (4002 FH5)", TEMIC, PAL,
  85           16*140.25,16*463.25,0x02,0x04,0x01,0x8e,623},
  86         { "Philips PAL_I (FI1246 and compatibles)", Philips, PAL_I,
  87           16*140.25,16*463.25,0xa0,0x90,0x30,0x8e,623},
  88         { "Philips NTSC (FI1236,FM1236 and compatibles)", Philips, NTSC,
  89           16*157.25,16*451.25,0xA0,0x90,0x30,0x8e,732},
  90         { "Philips (SECAM+PAL_BG) (FI1216MF, FM1216MF, FR1216MF)", Philips, SECAM,
  91           16*168.25,16*447.25,0xA7,0x97,0x37,0x8e,623},
  92
  93         { "NoTuner", NoTuner, NOTUNER,
  94           0,0,0x00,0x00,0x00,0x00,0x00},
  95         { "Philips PAL_BG (FI1216 and compatibles)", Philips, PAL,
  96           16*168.25,16*447.25,0xA0,0x90,0x30,0x8e,623},
  97         { "Temic NTSC (4032 FY5)", TEMIC, NTSC,
  98           16*157.25,16*463.25,0x02,0x04,0x01,0x8e,732},
  99         { "Temic PAL_I (4062 FY5)", TEMIC, PAL_I,
 100           16*170.00,16*450.00,0x02,0x04,0x01,0x8e,623},
 101
 102         { "Temic NTSC (4036 FY5)", TEMIC, NTSC,
 103           16*157.25,16*463.25,0xa0,0x90,0x30,0x8e,732},
 104         { "Alps HSBH1", TEMIC, NTSC,
 105           16*137.25,16*385.25,0x01,0x02,0x08,0x8e,732},
 106         { "Alps TSBE1",TEMIC,PAL,
 107           16*137.25,16*385.25,0x01,0x02,0x08,0x8e,732},
 108         { "Alps TSBB5", Alps, PAL_I, /* tested (UK UHF) with Modulartech MM205 */
 109           16*133.25,16*351.25,0x01,0x02,0x08,0x8e,632},
 110
 111         { "Alps TSBE5", Alps, PAL, /* untested - data sheet guess. Only IF differs. */
 112           16*133.25,16*351.25,0x01,0x02,0x08,0x8e,622},
 113         { "Alps TSBC5", Alps, PAL, /* untested - data sheet guess. Only IF differs. */
 114           16*133.25,16*351.25,0x01,0x02,0x08,0x8e,608},
 115         { "Temic PAL_BG (4006FH5)", TEMIC, PAL,
 116           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 117         { "Alps TSCH6",Alps,NTSC,
 118           16*137.25,16*385.25,0x14,0x12,0x11,0x8e,732},
 119
 120         { "Temic PAL_DK (4016 FY5)",TEMIC,PAL,
 121           16*168.25,16*456.25,0xa0,0x90,0x30,0x8e,623},
 122         { "Philips NTSC_M (MK2)",Philips,NTSC,
 123           16*160.00,16*454.00,0xa0,0x90,0x30,0x8e,732},
 124         { "Temic PAL_I (4066 FY5)", TEMIC, PAL_I,
 125           16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},
 126         { "Temic PAL* auto (4006 FN5)", TEMIC, PAL,
 127           16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},
 128
 129         { "Temic PAL_BG (4009 FR5) or PAL_I (4069 FR5)", TEMIC, PAL,
 130           16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
 131         { "Temic NTSC (4039 FR5)", TEMIC, NTSC,
 132           16*158.00, 16*453.00, 0xa0,0x90,0x30,0x8e,732},
 133         { "Temic PAL/SECAM multi (4046 FM5)", TEMIC, PAL,
 134           16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},
 135         { "Philips PAL_DK (FI1256 and compatibles)", Philips, PAL,
 136           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 137
 138         { "Philips PAL/SECAM multi (FQ1216ME)", Philips, PAL,
 139           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 140         { "LG PAL_I+FM (TAPC-I001D)", LGINNOTEK, PAL_I,
 141           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 142         { "LG PAL_I (TAPC-I701D)", LGINNOTEK, PAL_I,
 143           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 144         { "LG NTSC+FM (TPI8NSR01F)", LGINNOTEK, NTSC,
 145           16*210.00,16*497.00,0xa0,0x90,0x30,0x8e,732},
 146
 147         { "LG PAL_BG+FM (TPI8PSB01D)", LGINNOTEK, PAL,
 148           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 149         { "LG PAL_BG (TPI8PSB11D)", LGINNOTEK, PAL,
 150           16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
 151         { "Temic PAL* auto + FM (4009 FN5)", TEMIC, PAL,
 152           16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
 153         { "SHARP NTSC_JP (2U5JF5540)", SHARP, NTSC, /* 940=16*58.75 NTSC@Japan */
 154           16*137.25,16*317.25,0x01,0x02,0x08,0x8e,940 },
 155
 156         { "Samsung PAL TCPM9091PD27", Samsung, PAL,  /* from sourceforge v3tv */
 157           16*169,16*464,0xA0,0x90,0x30,0x8e,623},
 158         { "MT20xx universal", Microtune,PAL|NTSC,
 159           /* see mt20xx.c for details */ },
 160         { "Temic PAL_BG (4106 FH5)", TEMIC, PAL,
 161           16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
 162         { "Temic PAL_DK/SECAM_L (4012 FY5)", TEMIC, PAL,
 163           16*140.25, 16*463.25, 0x02,0x04,0x01,0x8e,623},
 164
 165         { "Temic NTSC (4136 FY5)", TEMIC, NTSC,
 166           16*158.00, 16*453.00, 0xa0,0x90,0x30,0x8e,732},
 167         { "LG PAL (newer TAPC series)", LGINNOTEK, PAL,
 168           16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,623},
 169         { "Philips PAL/SECAM multi (FM1216ME MK3)", Philips, PAL,
 170           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,623 },
 171         { "LG NTSC (newer TAPC series)", LGINNOTEK, NTSC,
 172           16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,732},
 173
 174         { "HITACHI V7-J180AT", HITACHI, NTSC,
 175           16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,940 },
 176         { "Philips PAL_MK (FI1216 MK)", Philips, PAL,
 177           16*140.25,16*463.25,0x01,0xc2,0xcf,0x8e,623},
 178         { "Philips 1236D ATSC/NTSC daul in",Philips,ATSC,
 179           16*157.25,16*454.00,0xa0,0x90,0x30,0x8e,732},
 180         { "Philips NTSC MK3 (FM1236MK3 or FM1236/F)", Philips, NTSC,
 181           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732},
 182
 183         { "Philips 4 in 1 (ATI TV Wonder Pro/Conexant)", Philips, NTSC,
 184           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732},
 185         { "Microtune 4049 FM5",Microtune,PAL,
 186           16*141.00,16*464.00,0xa0,0x90,0x30,0x8e,623},
 187         { "Panasonic VP27s/ENGE4324D", Panasonic, NTSC,
 188           16*160.00,16*454.00,0x01,0x02,0x08,0xce,940},
 189         { "LG NTSC (TAPE series)", LGINNOTEK, NTSC,
 190           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732 },
 191
 192         { "Tenna TNF 8831 BGFF)", Philips, PAL,
 193           16*161.25,16*463.25,0xa0,0x90,0x30,0x8e,623},
 194         { "Microtune 4042 FI5 ATSC/NTSC dual in", Microtune, NTSC,
 195           16*162.00,16*457.00,0xa2,0x94,0x31,0x8e,732},
 196         { "TCL 2002N", TCL, NTSC,
 197           16*172.00,16*448.00,0x01,0x02,0x08,0x8e,732},
 198         { "Philips PAL/SECAM_D (FM 1256 I-H3)", Philips, PAL,
 199           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,623 },
 200
 201         { "Thomson DDT 7610 (ATSC/NTSC)", THOMSON, ATSC,
 202           16*157.25,16*454.00,0x39,0x3a,0x3c,0x8e,732},
 203         { "Philips FQ1286", Philips, NTSC,
 204           16*160.00,16*454.00,0x41,0x42,0x04,0x8e,940}, // UHF band untested
 205         { "tda8290+75", Philips,PAL|NTSC,
 206           /* see tda8290.c for details */ },
 207         { "LG PAL (TAPE series)", LGINNOTEK, PAL,
 208           16*170.00, 16*450.00, 0x01,0x02,0x08,0xce,623},
 209
 210         { "Philips PAL/SECAM multi (FQ1216AME MK4)", Philips, PAL,
 211           16*160.00,16*442.00,0x01,0x02,0x04,0xce,623 },
 212         { "Philips FQ1236A MK4", Philips, NTSC,
 213           16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732 },
 214
 215         /* Should work for TVF8531MF, TVF8831MF, TVF8731MF */
 216         { "Ymec TVision TVF-8531MF", Philips, NTSC,
 217           16*160.00,16*454.00,0xa0,0x90,0x30,0x8e,732},
 218         { "Ymec TVision TVF-5533MF", Philips, NTSC,
 219           16*160.00,16*454.00,0x01,0x02,0x04,0x8e,732},
 220 };
 221 unsigned const int tuner_count = ARRAY_SIZE(tuners);
 222
 223 /* ---------------------------------------------------------------------- */
 224
 225 static int tuner_getstatus(struct i2c_client *c)
 226 {
 227         unsigned char byte;
 228
 229         if (1 != i2c_master_recv(c,&byte,1))
 230                 return 0;
 231         return byte;
 232 }
 233
 234 #define TUNER_POR       0x80
 235 #define TUNER_FL        0x40
 236 #define TUNER_MODE      0x38
 237 #define TUNER_AFC       0x07
 238
 239 #define TUNER_STEREO    0x10 /* radio mode */
 240 #define TUNER_SIGNAL    0x07 /* radio mode */
 241
 242 static int tuner_signal(struct i2c_client *c)
 243 {
 244         return (tuner_getstatus(c) & TUNER_SIGNAL)<<13;
 245 }
 246
 247 static int tuner_stereo(struct i2c_client *c)
 248 {
 249         return (tuner_getstatus (c) & TUNER_STEREO);
 250 }
 251
 252 #if 0 /* unused */
 253 static int tuner_islocked (struct i2c_client *c)
 254 {
 255         return (tuner_getstatus (c) & TUNER_FL);
 256 }
 257
 258 static int tuner_afcstatus (struct i2c_client *c)
 259 {
 260         return (tuner_getstatus (c) & TUNER_AFC) - 2;
 261 }
 262
 263 static int tuner_mode (struct i2c_client *c)
 264 {
 265         return (tuner_getstatus (c) & TUNER_MODE) >> 3;
 266 }
 267 #endif
 268
 269 /* ---------------------------------------------------------------------- */
 270
 271 static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
 272 {
 273         struct tuner *t = i2c_get_clientdata(c);
 274         u8 config;
 275         u16 div;
 276         struct tunertype *tun;
 277         unsigned char buffer[4];
 278         int rc;
 279
 280         tun = &tuners[t->type];
 281         if (freq < tun->thresh1) {
 282                 config = tun->VHF_L;
 283                 tuner_dbg("tv: VHF lowrange\n");
 284         } else if (freq < tun->thresh2) {
 285                 config = tun->VHF_H;
 286                 tuner_dbg("tv: VHF high range\n");
 287         } else {
 288                 config = tun->UHF;
 289                 tuner_dbg("tv: UHF range\n");
 290         }
 291
 292
 293         /* tv norm specific stuff for multi-norm tuners */
 294         switch (t->type) {
 295         case TUNER_PHILIPS_SECAM: // FI1216MF
 296                 /* 0x01 -> ??? no change ??? */
 297                 /* 0x02 -> PAL BDGHI / SECAM L */
 298                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 299                 config &= ~0x02;
 300                 if (t->std & V4L2_STD_SECAM)
 301                         config |= 0x02;
 302                 break;
 303
 304         case TUNER_TEMIC_4046FM5:
 305                 config &= ~0x0f;
 306
 307                 if (t->std & V4L2_STD_PAL_BG) {
 308                         config |= TEMIC_SET_PAL_BG;
 309
 310                 } else if (t->std & V4L2_STD_PAL_I) {
 311                         config |= TEMIC_SET_PAL_I;
 312
 313                 } else if (t->std & V4L2_STD_PAL_DK) {
 314                         config |= TEMIC_SET_PAL_DK;
 315
 316                 } else if (t->std & V4L2_STD_SECAM_L) {
 317                         config |= TEMIC_SET_PAL_L;
 318
 319                 }
 320                 break;
 321
 322         case TUNER_PHILIPS_FQ1216ME:
 323                 config &= ~0x0f;
 324
 325                 if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 326                         config |= PHILIPS_SET_PAL_BGDK;
 327
 328                 } else if (t->std & V4L2_STD_PAL_I) {
 329                         config |= PHILIPS_SET_PAL_I;
 330
 331                 } else if (t->std & V4L2_STD_SECAM_L) {
 332                         config |= PHILIPS_SET_PAL_L;
 333
 334                 }
 335                 break;
 336
 337         case TUNER_PHILIPS_ATSC:
 338                 /* 0x00 -> ATSC antenna input 1 */
 339                 /* 0x01 -> ATSC antenna input 2 */
 340                 /* 0x02 -> NTSC antenna input 1 */
 341                 /* 0x03 -> NTSC antenna input 2 */
 342                 config &= ~0x03;
 343                 if (!(t->std & V4L2_STD_ATSC))
 344                         config |= 2;
 345                 /* FIXME: input */
 346                 break;
 347
 348         case TUNER_MICROTUNE_4042FI5:
 349                 /* Set the charge pump for fast tuning */
 350                 tun->config |= 0x40;
 351                 break;
 352         }
 353
 354         /*
 355          * Philips FI1216MK2 remark from specification :
 356          * for channel selection involving band switching, and to ensure
 357          * smooth tuning to the desired channel without causing
 358          * unnecessary charge pump action, it is recommended to consider
 359          * the difference between wanted channel frequency and the
 360          * current channel frequency.  Unnecessary charge pump action
 361          * will result in very low tuning voltage which may drive the
 362          * oscillator to extreme conditions.
 363          *
 364          * Progfou: specification says to send config data before
 365          * frequency in case (wanted frequency < current frequency).
 366          */
 367
 368         div=freq + tun->IFPCoff;
 369         if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) {
 370                 buffer[0] = tun->config;
 371                 buffer[1] = config;
 372                 buffer[2] = (div>>8) & 0x7f;
 373                 buffer[3] = div      & 0xff;
 374         } else {
 375                 buffer[0] = (div>>8) & 0x7f;
 376                 buffer[1] = div      & 0xff;
 377                 buffer[2] = tun->config;
 378                 buffer[3] = config;
 379         }
 380         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 381                   buffer[0],buffer[1],buffer[2],buffer[3]);
 382
 383         if (4 != (rc = i2c_master_send(c,buffer,4)))
 384                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 385
 386         if (t->type == TUNER_MICROTUNE_4042FI5) {
 387                 // FIXME - this may also work for other tuners
 388                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 389                 u8 status_byte = 0;
 390
 391                 /* Wait until the PLL locks */
 392                 for (;;) {
 393                         if (time_after(jiffies,timeout))
 394                                 return;
 395                         if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
 396                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 397                                 break;
 398                         }
 399                         /* bit 6 is PLL locked indicator */
 400                         if (status_byte & 0x40)
 401                                 break;
 402                         udelay(10);
 403                 }
 404
 405                 /* Set the charge pump for optimized phase noise figure */
 406                 tun->config &= ~0x40;
 407                 buffer[0] = (div>>8) & 0x7f;
 408                 buffer[1] = div      & 0xff;
 409                 buffer[2] = tun->config;
 410                 buffer[3] = config;
 411                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 412                        buffer[0],buffer[1],buffer[2],buffer[3]);
 413
 414                 if (4 != (rc = i2c_master_send(c,buffer,4)))
 415                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 416         }
 417 }
 418
 419 static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
 420 {
 421         struct tunertype *tun;
 422         struct tuner *t = i2c_get_clientdata(c);
 423         unsigned char buffer[4];
 424         unsigned div;
 425         int rc;
 426
 427         tun=&tuners[t->type];
 428         div = freq + (int)(16*10.7);
 429         buffer[2] = tun->config;
 430
 431         switch (t->type) {
 432         case TUNER_YMEC_TVF_5533MF:
 433
 434                 /*These values are empirically determinated */
 435                 div = (freq*122)/16 - 20;
 436                 buffer[2] = 0x88; /* could be also 0x80 */
 437                 buffer[3] = 0x19; /* could be also 0x10, 0x18, 0x99 */
 438                 break;
 439         case TUNER_PHILIPS_FM1216ME_MK3:
 440         case TUNER_PHILIPS_FM1236_MK3:
 441                 buffer[3] = 0x19;
 442                 break;
 443         case TUNER_PHILIPS_FM1256_IH3:
 444                 div = (20 * freq)/16 + 333 * 2;
 445                 buffer[2] = 0x80;
 446                 buffer[3] = 0x19;
 447                 break;
 448         case TUNER_LG_PAL_FM:
 449                 buffer[3] = 0xa5;
 450                 break;
 451         default:
 452                 buffer[3] = 0xa4;
 453                 break;
 454         }
 455         buffer[0] = (div>>8) & 0x7f;
 456         buffer[1] = div      & 0xff;
 457
 458         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 459                buffer[0],buffer[1],buffer[2],buffer[3]);
 460
 461         if (4 != (rc = i2c_master_send(c,buffer,4)))
 462                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 463 }
 464
 465 int default_tuner_init(struct i2c_client *c)
 466 {
 467         struct tuner *t = i2c_get_clientdata(c);
 468
 469         tuner_info("type set to %d (%s)\n",
 470                    t->type, tuners[t->type].name);
 471         strlcpy(c->name, tuners[t->type].name, sizeof(c->name));
 472
 473         switch (t->type) {
 474         case TUNER_YMEC_TVF_5533MF:
 475                 {
 476                         struct tuner_addr tun_addr = { V4L2_TUNER_ANALOG_TV, 0xc2>>1 };
 477
 478                         if (c->driver->command) {
 479                                 c->driver->command(c, TUNER_SET_ADDR, &tun_addr);
 480                         } else {
 481                                 tuner_warn("Couldn't set TV tuner I2C address to 0x%02x\n",tun_addr.addr<<1);
 482                         }
 483                         break;
 484                 }
 485         }
 486
 487         t->tv_freq    = default_set_tv_freq;
 488         t->radio_freq = default_set_radio_freq;
 489         t->has_signal = tuner_signal;
 490         t->is_stereo  = tuner_stereo;
 491         return 0;
 492 }
 493
 494 /*
 495  * Overrides for Emacs so that we follow Linus's tabbing style.
 496  * ---------------------------------------------------------------------------
 497  * Local variables:
 498  * c-basic-offset: 8
 499  * End:
 500  */