drivers/media/video/tuner-simple.c

   1 /*
   2  * i2c tv tuner chip device driver
   3  * controls all those simple 4-control-bytes style tuners.
   4  *
   5  * This "tuner-simple" module was split apart from the original "tuner" module.
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/i2c.h>
   9 #include <linux/videodev.h>
  10 #include <media/tuner.h>
  11 #include <media/v4l2-common.h>
  12 #include <media/tuner-types.h>
  13 #include "tuner-i2c.h"
  14 #include "tuner-simple.h"
  15
  16 static int debug = 0;
  17 module_param(debug, int, 0644);
  18 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  19
  20 #define PREFIX "tuner-simple "
  21
  22 static int offset = 0;
  23 module_param(offset, int, 0664);
  24 MODULE_PARM_DESC(offset,"Allows to specify an offset for tuner");
  25
  26 /* ---------------------------------------------------------------------- */
  27
  28 /* tv standard selection for Temic 4046 FM5
  29    this value takes the low bits of control byte 2
  30    from datasheet Rev.01, Feb.00
  31      standard     BG      I       L       L2      D
  32      picture IF   38.9    38.9    38.9    33.95   38.9
  33      sound 1      33.4    32.9    32.4    40.45   32.4
  34      sound 2      33.16
  35      NICAM        33.05   32.348  33.05           33.05
  36  */
  37 #define TEMIC_SET_PAL_I         0x05
  38 #define TEMIC_SET_PAL_DK        0x09
  39 #define TEMIC_SET_PAL_L         0x0a // SECAM ?
  40 #define TEMIC_SET_PAL_L2        0x0b // change IF !
  41 #define TEMIC_SET_PAL_BG        0x0c
  42
  43 /* tv tuner system standard selection for Philips FQ1216ME
  44    this value takes the low bits of control byte 2
  45    from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
  46      standard           BG      DK      I       L       L`
  47      picture carrier    38.90   38.90   38.90   38.90   33.95
  48      colour             34.47   34.47   34.47   34.47   38.38
  49      sound 1            33.40   32.40   32.90   32.40   40.45
  50      sound 2            33.16   -       -       -       -
  51      NICAM              33.05   33.05   32.35   33.05   39.80
  52  */
  53 #define PHILIPS_SET_PAL_I       0x01 /* Bit 2 always zero !*/
  54 #define PHILIPS_SET_PAL_BGDK    0x09
  55 #define PHILIPS_SET_PAL_L2      0x0a
  56 #define PHILIPS_SET_PAL_L       0x0b
  57
  58 /* system switching for Philips FI1216MF MK2
  59    from datasheet "1996 Jul 09",
  60     standard         BG     L      L'
  61     picture carrier  38.90  38.90  33.95
  62     colour           34.47  34.37  38.38
  63     sound 1          33.40  32.40  40.45
  64     sound 2          33.16  -      -
  65     NICAM            33.05  33.05  39.80
  66  */
  67 #define PHILIPS_MF_SET_STD_BG   0x01 /* Bit 2 must be zero, Bit 3 is system output */
  68 #define PHILIPS_MF_SET_STD_L    0x03 /* Used on Secam France */
  69 #define PHILIPS_MF_SET_STD_LC   0x02 /* Used on SECAM L' */
  70
  71 /* Control byte */
  72
  73 #define TUNER_RATIO_MASK        0x06 /* Bit cb1:cb2 */
  74 #define TUNER_RATIO_SELECT_50   0x00
  75 #define TUNER_RATIO_SELECT_32   0x02
  76 #define TUNER_RATIO_SELECT_166  0x04
  77 #define TUNER_RATIO_SELECT_62   0x06
  78
  79 #define TUNER_CHARGE_PUMP       0x40  /* Bit cb6 */
  80
  81 /* Status byte */
  82
  83 #define TUNER_POR         0x80
  84 #define TUNER_FL          0x40
  85 #define TUNER_MODE        0x38
  86 #define TUNER_AFC         0x07
  87 #define TUNER_SIGNAL      0x07
  88 #define TUNER_STEREO      0x10
  89
  90 #define TUNER_PLL_LOCKED   0x40
  91 #define TUNER_STEREO_MK3   0x04
  92
  93 struct tuner_simple_priv {
  94         u16 last_div;
  95         struct tuner_i2c_props i2c_props;
  96
  97         unsigned int type;
  98         struct tunertype *tun;
  99
 100         u32 frequency;
 101 };
 102
 103 /* ---------------------------------------------------------------------- */
 104
 105 static int tuner_getstatus(struct dvb_frontend *fe)
 106 {
 107         struct tuner_simple_priv *priv = fe->tuner_priv;
 108         unsigned char byte;
 109
 110         if (1 != tuner_i2c_xfer_recv(&priv->i2c_props,&byte,1))
 111                 return 0;
 112
 113         return byte;
 114 }
 115
 116 static int tuner_signal(struct dvb_frontend *fe)
 117 {
 118         return (tuner_getstatus(fe) & TUNER_SIGNAL) << 13;
 119 }
 120
 121 static int tuner_stereo(struct dvb_frontend *fe)
 122 {
 123         struct tuner_simple_priv *priv = fe->tuner_priv;
 124
 125         int stereo, status;
 126
 127         status = tuner_getstatus(fe);
 128
 129         switch (priv->type) {
 130                 case TUNER_PHILIPS_FM1216ME_MK3:
 131                 case TUNER_PHILIPS_FM1236_MK3:
 132                 case TUNER_PHILIPS_FM1256_IH3:
 133                 case TUNER_LG_NTSC_TAPE:
 134                         stereo = ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 135                         break;
 136                 default:
 137                         stereo = status & TUNER_STEREO;
 138         }
 139
 140         return stereo;
 141 }
 142
 143
 144 static int simple_get_status(struct dvb_frontend *fe, u32 *status)
 145 {
 146         struct tuner_simple_priv *priv = fe->tuner_priv;
 147         int signal = tuner_signal(fe);
 148
 149         *status = 0;
 150
 151         if (signal)
 152                 *status = TUNER_STATUS_LOCKED;
 153         if (tuner_stereo(fe))
 154                 *status |= TUNER_STATUS_STEREO;
 155
 156         tuner_dbg("tuner-simple: Signal strength: %d\n", signal);
 157
 158         return 0;
 159 }
 160
 161 /* ---------------------------------------------------------------------- */
 162
 163 static int simple_set_tv_freq(struct dvb_frontend *fe,
 164                               struct analog_parameters *params)
 165 {
 166         struct tuner_simple_priv *priv = fe->tuner_priv;
 167         u8 config, cb, tuneraddr;
 168         u16 div;
 169         struct tunertype *tun;
 170         u8 buffer[4];
 171         int rc, IFPCoff, i, j;
 172         enum param_type desired_type;
 173         struct tuner_params *t_params;
 174
 175         tun = priv->tun;
 176
 177         /* IFPCoff = Video Intermediate Frequency - Vif:
 178                 940  =16*58.75  NTSC/J (Japan)
 179                 732  =16*45.75  M/N STD
 180                 704  =16*44     ATSC (at DVB code)
 181                 632  =16*39.50  I U.K.
 182                 622.4=16*38.90  B/G D/K I, L STD
 183                 592  =16*37.00  D China
 184                 590  =16.36.875 B Australia
 185                 543.2=16*33.95  L' STD
 186                 171.2=16*10.70  FM Radio (at set_radio_freq)
 187         */
 188
 189         if (params->std == V4L2_STD_NTSC_M_JP) {
 190                 IFPCoff      = 940;
 191                 desired_type = TUNER_PARAM_TYPE_NTSC;
 192         } else if ((params->std & V4L2_STD_MN) &&
 193                   !(params->std & ~V4L2_STD_MN)) {
 194                 IFPCoff      = 732;
 195                 desired_type = TUNER_PARAM_TYPE_NTSC;
 196         } else if (params->std == V4L2_STD_SECAM_LC) {
 197                 IFPCoff      = 543;
 198                 desired_type = TUNER_PARAM_TYPE_SECAM;
 199         } else {
 200                 IFPCoff      = 623;
 201                 desired_type = TUNER_PARAM_TYPE_PAL;
 202         }
 203
 204         for (j = 0; j < tun->count-1; j++) {
 205                 if (desired_type != tun->params[j].type)
 206                         continue;
 207                 break;
 208         }
 209         /* use default tuner_t_params if desired_type not available */
 210         if (desired_type != tun->params[j].type) {
 211                 tuner_dbg("IFPCoff = %d: tuner_t_params undefined for tuner %d\n",
 212                           IFPCoff, priv->type);
 213                 j = 0;
 214         }
 215         t_params = &tun->params[j];
 216
 217         for (i = 0; i < t_params->count; i++) {
 218                 if (params->frequency > t_params->ranges[i].limit)
 219                         continue;
 220                 break;
 221         }
 222         if (i == t_params->count) {
 223                 tuner_dbg("TV frequency out of range (%d > %d)",
 224                                 params->frequency, t_params->ranges[i - 1].limit);
 225                 params->frequency = t_params->ranges[--i].limit;
 226         }
 227         config = t_params->ranges[i].config;
 228         cb     = t_params->ranges[i].cb;
 229         /*  i == 0 -> VHF_LO
 230          *  i == 1 -> VHF_HI
 231          *  i == 2 -> UHF     */
 232         tuner_dbg("tv: param %d, range %d\n",j,i);
 233
 234         div=params->frequency + IFPCoff + offset;
 235
 236         tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 237                                         params->frequency / 16, params->frequency % 16 * 100 / 16,
 238                                         IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 239                                         offset / 16, offset % 16 * 100 / 16,
 240                                         div);
 241
 242         /* tv norm specific stuff for multi-norm tuners */
 243         switch (priv->type) {
 244         case TUNER_PHILIPS_SECAM: // FI1216MF
 245                 /* 0x01 -> ??? no change ??? */
 246                 /* 0x02 -> PAL BDGHI / SECAM L */
 247                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 248                 cb &= ~0x03;
 249                 if (params->std & V4L2_STD_SECAM_L) //also valid for V4L2_STD_SECAM
 250                         cb |= PHILIPS_MF_SET_STD_L;
 251                 else if (params->std & V4L2_STD_SECAM_LC)
 252                         cb |= PHILIPS_MF_SET_STD_LC;
 253                 else /* V4L2_STD_B|V4L2_STD_GH */
 254                         cb |= PHILIPS_MF_SET_STD_BG;
 255                 break;
 256
 257         case TUNER_TEMIC_4046FM5:
 258                 cb &= ~0x0f;
 259
 260                 if (params->std & V4L2_STD_PAL_BG) {
 261                         cb |= TEMIC_SET_PAL_BG;
 262
 263                 } else if (params->std & V4L2_STD_PAL_I) {
 264                         cb |= TEMIC_SET_PAL_I;
 265
 266                 } else if (params->std & V4L2_STD_PAL_DK) {
 267                         cb |= TEMIC_SET_PAL_DK;
 268
 269                 } else if (params->std & V4L2_STD_SECAM_L) {
 270                         cb |= TEMIC_SET_PAL_L;
 271
 272                 }
 273                 break;
 274
 275         case TUNER_PHILIPS_FQ1216ME:
 276                 cb &= ~0x0f;
 277
 278                 if (params->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 279                         cb |= PHILIPS_SET_PAL_BGDK;
 280
 281                 } else if (params->std & V4L2_STD_PAL_I) {
 282                         cb |= PHILIPS_SET_PAL_I;
 283
 284                 } else if (params->std & V4L2_STD_SECAM_L) {
 285                         cb |= PHILIPS_SET_PAL_L;
 286
 287                 }
 288                 break;
 289
 290         case TUNER_PHILIPS_ATSC:
 291                 /* 0x00 -> ATSC antenna input 1 */
 292                 /* 0x01 -> ATSC antenna input 2 */
 293                 /* 0x02 -> NTSC antenna input 1 */
 294                 /* 0x03 -> NTSC antenna input 2 */
 295                 cb &= ~0x03;
 296                 if (!(params->std & V4L2_STD_ATSC))
 297                         cb |= 2;
 298                 /* FIXME: input */
 299                 break;
 300
 301         case TUNER_MICROTUNE_4042FI5:
 302                 /* Set the charge pump for fast tuning */
 303                 config |= TUNER_CHARGE_PUMP;
 304                 break;
 305
 306         case TUNER_PHILIPS_TUV1236D:
 307                 /* 0x40 -> ATSC antenna input 1 */
 308                 /* 0x48 -> ATSC antenna input 2 */
 309                 /* 0x00 -> NTSC antenna input 1 */
 310                 /* 0x08 -> NTSC antenna input 2 */
 311                 buffer[0] = 0x14;
 312                 buffer[1] = 0x00;
 313                 buffer[2] = 0x17;
 314                 buffer[3] = 0x00;
 315                 cb &= ~0x40;
 316                 if (params->std & V4L2_STD_ATSC) {
 317                         cb |= 0x40;
 318                         buffer[1] = 0x04;
 319                 }
 320                 /* set to the correct mode (analog or digital) */
 321                 tuneraddr = priv->i2c_props.addr;
 322                 priv->i2c_props.addr = 0x0a;
 323                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[0],2)))
 324                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 325                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[2],2)))
 326                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 327                 priv->i2c_props.addr = tuneraddr;
 328                 /* FIXME: input */
 329                 break;
 330         }
 331
 332         if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
 333                 buffer[0] = config;
 334                 buffer[1] = cb;
 335                 buffer[2] = (div>>8) & 0x7f;
 336                 buffer[3] = div      & 0xff;
 337         } else {
 338                 buffer[0] = (div>>8) & 0x7f;
 339                 buffer[1] = div      & 0xff;
 340                 buffer[2] = config;
 341                 buffer[3] = cb;
 342         }
 343         priv->last_div = div;
 344         if (t_params->has_tda9887) {
 345                 int config = 0;
 346                 int is_secam_l = (params->std & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC)) &&
 347                         !(params->std & ~(V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC));
 348
 349                 if (params->std == V4L2_STD_SECAM_LC) {
 350                         if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
 351                                 config |= TDA9887_PORT1_ACTIVE;
 352                         if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
 353                                 config |= TDA9887_PORT2_ACTIVE;
 354                 }
 355                 else {
 356                         if (t_params->port1_active)
 357                                 config |= TDA9887_PORT1_ACTIVE;
 358                         if (t_params->port2_active)
 359                                 config |= TDA9887_PORT2_ACTIVE;
 360                 }
 361                 if (t_params->intercarrier_mode)
 362                         config |= TDA9887_INTERCARRIER;
 363                 if (is_secam_l) {
 364                         if (i == 0 && t_params->default_top_secam_low)
 365                                 config |= TDA9887_TOP(t_params->default_top_secam_low);
 366                         else if (i == 1 && t_params->default_top_secam_mid)
 367                                 config |= TDA9887_TOP(t_params->default_top_secam_mid);
 368                         else if (t_params->default_top_secam_high)
 369                                 config |= TDA9887_TOP(t_params->default_top_secam_high);
 370                 }
 371                 else {
 372                         if (i == 0 && t_params->default_top_low)
 373                                 config |= TDA9887_TOP(t_params->default_top_low);
 374                         else if (i == 1 && t_params->default_top_mid)
 375                                 config |= TDA9887_TOP(t_params->default_top_mid);
 376                         else if (t_params->default_top_high)
 377                                 config |= TDA9887_TOP(t_params->default_top_high);
 378                 }
 379                 if (t_params->default_pll_gating_18)
 380                         config |= TDA9887_GATING_18;
 381                 i2c_clients_command(priv->i2c_props.adap, TDA9887_SET_CONFIG, &config);
 382         }
 383         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 384                   buffer[0],buffer[1],buffer[2],buffer[3]);
 385
 386         if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 387                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 388
 389         switch (priv->type) {
 390         case TUNER_LG_TDVS_H06XF:
 391                 /* Set the Auxiliary Byte. */
 392                 buffer[0] = buffer[2];
 393                 buffer[0] &= ~0x20;
 394                 buffer[0] |= 0x18;
 395                 buffer[1] = 0x20;
 396                 tuner_dbg("tv 0x%02x 0x%02x\n",buffer[0],buffer[1]);
 397
 398                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,2)))
 399                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 400                 break;
 401         case TUNER_MICROTUNE_4042FI5:
 402         {
 403                 // FIXME - this may also work for other tuners
 404                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 405                 u8 status_byte = 0;
 406
 407                 /* Wait until the PLL locks */
 408                 for (;;) {
 409                         if (time_after(jiffies,timeout))
 410                                 return 0;
 411                         if (1 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props,&status_byte,1))) {
 412                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 413                                 break;
 414                         }
 415                         if (status_byte & TUNER_PLL_LOCKED)
 416                                 break;
 417                         udelay(10);
 418                 }
 419
 420                 /* Set the charge pump for optimized phase noise figure */
 421                 config &= ~TUNER_CHARGE_PUMP;
 422                 buffer[0] = (div>>8) & 0x7f;
 423                 buffer[1] = div      & 0xff;
 424                 buffer[2] = config;
 425                 buffer[3] = cb;
 426                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 427                           buffer[0],buffer[1],buffer[2],buffer[3]);
 428
 429                 if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 430                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 431                 break;
 432         }
 433         }
 434         return 0;
 435 }
 436
 437 static int simple_set_radio_freq(struct dvb_frontend *fe,
 438                                  struct analog_parameters *params)
 439 {
 440         struct tunertype *tun;
 441         struct tuner_simple_priv *priv = fe->tuner_priv;
 442         u8 buffer[4];
 443         u16 div;
 444         int rc, j;
 445         struct tuner_params *t_params;
 446         unsigned int freq = params->frequency;
 447
 448         tun = priv->tun;
 449
 450         for (j = tun->count-1; j > 0; j--)
 451                 if (tun->params[j].type == TUNER_PARAM_TYPE_RADIO)
 452                         break;
 453         /* default t_params (j=0) will be used if desired type wasn't found */
 454         t_params = &tun->params[j];
 455
 456         /* Select Radio 1st IF used */
 457         switch (t_params->radio_if) {
 458         case 0: /* 10.7 MHz */
 459                 freq += (unsigned int)(10.7*16000);
 460                 break;
 461         case 1: /* 33.3 MHz */
 462                 freq += (unsigned int)(33.3*16000);
 463                 break;
 464         case 2: /* 41.3 MHz */
 465                 freq += (unsigned int)(41.3*16000);
 466                 break;
 467         default:
 468                 tuner_warn("Unsupported radio_if value %d\n", t_params->radio_if);
 469                 return 0;
 470         }
 471
 472         /* Bandswitch byte */
 473         switch (priv->type) {
 474         case TUNER_TENA_9533_DI:
 475         case TUNER_YMEC_TVF_5533MF:
 476                 tuner_dbg("This tuner doesn't have FM. Most cards have a TEA5767 for FM\n");
 477                 return 0;
 478         case TUNER_PHILIPS_FM1216ME_MK3:
 479         case TUNER_PHILIPS_FM1236_MK3:
 480         case TUNER_PHILIPS_FMD1216ME_MK3:
 481         case TUNER_LG_NTSC_TAPE:
 482         case TUNER_PHILIPS_FM1256_IH3:
 483                 buffer[3] = 0x19;
 484                 break;
 485         case TUNER_TNF_5335MF:
 486                 buffer[3] = 0x11;
 487                 break;
 488         case TUNER_LG_PAL_FM:
 489                 buffer[3] = 0xa5;
 490                 break;
 491         case TUNER_THOMSON_DTT761X:
 492                 buffer[3] = 0x39;
 493                 break;
 494         case TUNER_MICROTUNE_4049FM5:
 495         default:
 496                 buffer[3] = 0xa4;
 497                 break;
 498         }
 499
 500         buffer[2] = (t_params->ranges[0].config & ~TUNER_RATIO_MASK) |
 501                     TUNER_RATIO_SELECT_50; /* 50 kHz step */
 502
 503         /* Convert from 1/16 kHz V4L steps to 1/20 MHz (=50 kHz) PLL steps
 504            freq * (1 Mhz / 16000 V4L steps) * (20 PLL steps / 1 MHz) =
 505            freq * (1/800) */
 506         div = (freq + 400) / 800;
 507
 508         if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
 509                 buffer[0] = buffer[2];
 510                 buffer[1] = buffer[3];
 511                 buffer[2] = (div>>8) & 0x7f;
 512                 buffer[3] = div      & 0xff;
 513         } else {
 514                 buffer[0] = (div>>8) & 0x7f;
 515                 buffer[1] = div      & 0xff;
 516         }
 517
 518         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 519                buffer[0],buffer[1],buffer[2],buffer[3]);
 520         priv->last_div = div;
 521
 522         if (t_params->has_tda9887) {
 523                 int config = 0;
 524                 if (t_params->port1_active && !t_params->port1_fm_high_sensitivity)
 525                         config |= TDA9887_PORT1_ACTIVE;
 526                 if (t_params->port2_active && !t_params->port2_fm_high_sensitivity)
 527                         config |= TDA9887_PORT2_ACTIVE;
 528                 if (t_params->intercarrier_mode)
 529                         config |= TDA9887_INTERCARRIER;
 530 /*              if (t_params->port1_set_for_fm_mono)
 531                         config &= ~TDA9887_PORT1_ACTIVE;*/
 532                 if (t_params->fm_gain_normal)
 533                         config |= TDA9887_GAIN_NORMAL;
 534                 if (t_params->radio_if == 2)
 535                         config |= TDA9887_RIF_41_3;
 536                 i2c_clients_command(priv->i2c_props.adap, TDA9887_SET_CONFIG, &config);
 537         }
 538         if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 539                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 540
 541         return 0;
 542 }
 543
 544 static int simple_set_params(struct dvb_frontend *fe,
 545                              struct analog_parameters *params)
 546 {
 547         struct tuner_simple_priv *priv = fe->tuner_priv;
 548         int ret = -EINVAL;
 549
 550         switch (params->mode) {
 551         case V4L2_TUNER_RADIO:
 552                 ret = simple_set_radio_freq(fe, params);
 553                 priv->frequency = params->frequency * 125 / 2;
 554                 break;
 555         case V4L2_TUNER_ANALOG_TV:
 556         case V4L2_TUNER_DIGITAL_TV:
 557                 ret = simple_set_tv_freq(fe, params);
 558                 priv->frequency = params->frequency * 62500;
 559                 break;
 560         }
 561
 562         return ret;
 563 }
 564
 565
 566 static int simple_release(struct dvb_frontend *fe)
 567 {
 568         kfree(fe->tuner_priv);
 569         fe->tuner_priv = NULL;
 570
 571         return 0;
 572 }
 573
 574 static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 575 {
 576         struct tuner_simple_priv *priv = fe->tuner_priv;
 577         *frequency = priv->frequency;
 578         return 0;
 579 }
 580
 581 static struct dvb_tuner_ops simple_tuner_ops = {
 582         .set_analog_params = simple_set_params,
 583         .release        = simple_release,
 584         .get_frequency  = simple_get_frequency,
 585         .get_status     = simple_get_status,
 586 };
 587
 588 struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
 589                                          struct i2c_adapter *i2c_adap,
 590                                          u8 i2c_addr,
 591                                          struct simple_tuner_config *cfg)
 592 {
 593         struct tuner_simple_priv *priv = NULL;
 594
 595         priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
 596         if (priv == NULL)
 597                 return NULL;
 598         fe->tuner_priv = priv;
 599
 600         priv->i2c_props.addr = i2c_addr;
 601         priv->i2c_props.adap = i2c_adap;
 602         priv->type = cfg->type;
 603         priv->tun  = cfg->tun;
 604
 605         memcpy(&fe->ops.tuner_ops, &simple_tuner_ops, sizeof(struct dvb_tuner_ops));
 606
 607         tuner_info("type set to %d (%s)\n", cfg->type, cfg->tun->name);
 608
 609         strlcpy(fe->ops.tuner_ops.info.name, cfg->tun->name, sizeof(fe->ops.tuner_ops.info.name));
 610
 611         return fe;
 612 }
 613
 614
 615 EXPORT_SYMBOL_GPL(simple_tuner_attach);
 616
 617 MODULE_DESCRIPTION("Simple 4-control-bytes style tuner driver");
 618 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
 619 MODULE_LICENSE("GPL");
 620
 621 /*
 622  * Overrides for Emacs so that we follow Linus's tabbing style.
 623  * ---------------------------------------------------------------------------
 624  * Local variables:
 625  * c-basic-offset: 8
 626  * End:
 627  */