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_read_status(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 inline int tuner_signal(const int status)
 117 {
 118         return (status & TUNER_SIGNAL) << 13;
 119 }
 120
 121 static inline int tuner_stereo(const int type, const int status)
 122 {
 123         switch (type) {
 124                 case TUNER_PHILIPS_FM1216ME_MK3:
 125                 case TUNER_PHILIPS_FM1236_MK3:
 126                 case TUNER_PHILIPS_FM1256_IH3:
 127                 case TUNER_LG_NTSC_TAPE:
 128                         return ((status & TUNER_SIGNAL) == TUNER_STEREO_MK3);
 129                 default:
 130                         return status & TUNER_STEREO;
 131         }
 132 }
 133
 134 static inline int tuner_islocked(const int status)
 135 {
 136         return (status & TUNER_FL);
 137 }
 138
 139 static inline int tuner_afcstatus(const int status)
 140 {
 141         return (status & TUNER_AFC) - 2;
 142 }
 143
 144
 145 static int simple_get_status(struct dvb_frontend *fe, u32 *status)
 146 {
 147         struct tuner_simple_priv *priv = fe->tuner_priv;
 148         int tuner_status = tuner_read_status(fe);
 149
 150         *status = 0;
 151
 152         if (tuner_islocked(tuner_status))
 153                 *status = TUNER_STATUS_LOCKED;
 154         if (tuner_stereo(priv->type, tuner_status))
 155                 *status |= TUNER_STATUS_STEREO;
 156
 157         tuner_dbg("AFC Status: %d\n", tuner_afcstatus(tuner_status));
 158
 159         return 0;
 160 }
 161
 162 static int simple_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
 163 {
 164         struct tuner_simple_priv *priv = fe->tuner_priv;
 165         int signal = tuner_signal(tuner_read_status(fe));
 166
 167         *strength = signal;
 168
 169         tuner_dbg("Signal strength: %d\n", signal);
 170
 171         return 0;
 172 }
 173
 174 /* ---------------------------------------------------------------------- */
 175
 176 static int simple_set_tv_freq(struct dvb_frontend *fe,
 177                               struct analog_parameters *params)
 178 {
 179         struct tuner_simple_priv *priv = fe->tuner_priv;
 180         u8 config, cb, tuneraddr;
 181         u16 div;
 182         struct tunertype *tun;
 183         u8 buffer[4];
 184         int rc, IFPCoff, i, j;
 185         enum param_type desired_type;
 186         struct tuner_params *t_params;
 187
 188         tun = priv->tun;
 189
 190         /* IFPCoff = Video Intermediate Frequency - Vif:
 191                 940  =16*58.75  NTSC/J (Japan)
 192                 732  =16*45.75  M/N STD
 193                 704  =16*44     ATSC (at DVB code)
 194                 632  =16*39.50  I U.K.
 195                 622.4=16*38.90  B/G D/K I, L STD
 196                 592  =16*37.00  D China
 197                 590  =16.36.875 B Australia
 198                 543.2=16*33.95  L' STD
 199                 171.2=16*10.70  FM Radio (at set_radio_freq)
 200         */
 201
 202         if (params->std == V4L2_STD_NTSC_M_JP) {
 203                 IFPCoff      = 940;
 204                 desired_type = TUNER_PARAM_TYPE_NTSC;
 205         } else if ((params->std & V4L2_STD_MN) &&
 206                   !(params->std & ~V4L2_STD_MN)) {
 207                 IFPCoff      = 732;
 208                 desired_type = TUNER_PARAM_TYPE_NTSC;
 209         } else if (params->std == V4L2_STD_SECAM_LC) {
 210                 IFPCoff      = 543;
 211                 desired_type = TUNER_PARAM_TYPE_SECAM;
 212         } else {
 213                 IFPCoff      = 623;
 214                 desired_type = TUNER_PARAM_TYPE_PAL;
 215         }
 216
 217         for (j = 0; j < tun->count-1; j++) {
 218                 if (desired_type != tun->params[j].type)
 219                         continue;
 220                 break;
 221         }
 222         /* use default tuner_t_params if desired_type not available */
 223         if (desired_type != tun->params[j].type) {
 224                 tuner_dbg("IFPCoff = %d: tuner_t_params undefined for tuner %d\n",
 225                           IFPCoff, priv->type);
 226                 j = 0;
 227         }
 228         t_params = &tun->params[j];
 229
 230         for (i = 0; i < t_params->count; i++) {
 231                 if (params->frequency > t_params->ranges[i].limit)
 232                         continue;
 233                 break;
 234         }
 235         if (i == t_params->count) {
 236                 tuner_dbg("TV frequency out of range (%d > %d)",
 237                                 params->frequency, t_params->ranges[i - 1].limit);
 238                 params->frequency = t_params->ranges[--i].limit;
 239         }
 240         config = t_params->ranges[i].config;
 241         cb     = t_params->ranges[i].cb;
 242         /*  i == 0 -> VHF_LO
 243          *  i == 1 -> VHF_HI
 244          *  i == 2 -> UHF     */
 245         tuner_dbg("tv: param %d, range %d\n",j,i);
 246
 247         div=params->frequency + IFPCoff + offset;
 248
 249         tuner_dbg("Freq= %d.%02d MHz, V_IF=%d.%02d MHz, Offset=%d.%02d MHz, div=%0d\n",
 250                                         params->frequency / 16, params->frequency % 16 * 100 / 16,
 251                                         IFPCoff / 16, IFPCoff % 16 * 100 / 16,
 252                                         offset / 16, offset % 16 * 100 / 16,
 253                                         div);
 254
 255         /* tv norm specific stuff for multi-norm tuners */
 256         switch (priv->type) {
 257         case TUNER_PHILIPS_SECAM: // FI1216MF
 258                 /* 0x01 -> ??? no change ??? */
 259                 /* 0x02 -> PAL BDGHI / SECAM L */
 260                 /* 0x04 -> ??? PAL others / SECAM others ??? */
 261                 cb &= ~0x03;
 262                 if (params->std & V4L2_STD_SECAM_L) //also valid for V4L2_STD_SECAM
 263                         cb |= PHILIPS_MF_SET_STD_L;
 264                 else if (params->std & V4L2_STD_SECAM_LC)
 265                         cb |= PHILIPS_MF_SET_STD_LC;
 266                 else /* V4L2_STD_B|V4L2_STD_GH */
 267                         cb |= PHILIPS_MF_SET_STD_BG;
 268                 break;
 269
 270         case TUNER_TEMIC_4046FM5:
 271                 cb &= ~0x0f;
 272
 273                 if (params->std & V4L2_STD_PAL_BG) {
 274                         cb |= TEMIC_SET_PAL_BG;
 275
 276                 } else if (params->std & V4L2_STD_PAL_I) {
 277                         cb |= TEMIC_SET_PAL_I;
 278
 279                 } else if (params->std & V4L2_STD_PAL_DK) {
 280                         cb |= TEMIC_SET_PAL_DK;
 281
 282                 } else if (params->std & V4L2_STD_SECAM_L) {
 283                         cb |= TEMIC_SET_PAL_L;
 284
 285                 }
 286                 break;
 287
 288         case TUNER_PHILIPS_FQ1216ME:
 289                 cb &= ~0x0f;
 290
 291                 if (params->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
 292                         cb |= PHILIPS_SET_PAL_BGDK;
 293
 294                 } else if (params->std & V4L2_STD_PAL_I) {
 295                         cb |= PHILIPS_SET_PAL_I;
 296
 297                 } else if (params->std & V4L2_STD_SECAM_L) {
 298                         cb |= PHILIPS_SET_PAL_L;
 299
 300                 }
 301                 break;
 302
 303         case TUNER_PHILIPS_ATSC:
 304                 /* 0x00 -> ATSC antenna input 1 */
 305                 /* 0x01 -> ATSC antenna input 2 */
 306                 /* 0x02 -> NTSC antenna input 1 */
 307                 /* 0x03 -> NTSC antenna input 2 */
 308                 cb &= ~0x03;
 309                 if (!(params->std & V4L2_STD_ATSC))
 310                         cb |= 2;
 311                 /* FIXME: input */
 312                 break;
 313
 314         case TUNER_MICROTUNE_4042FI5:
 315                 /* Set the charge pump for fast tuning */
 316                 config |= TUNER_CHARGE_PUMP;
 317                 break;
 318
 319         case TUNER_PHILIPS_TUV1236D:
 320                 /* 0x40 -> ATSC antenna input 1 */
 321                 /* 0x48 -> ATSC antenna input 2 */
 322                 /* 0x00 -> NTSC antenna input 1 */
 323                 /* 0x08 -> NTSC antenna input 2 */
 324                 buffer[0] = 0x14;
 325                 buffer[1] = 0x00;
 326                 buffer[2] = 0x17;
 327                 buffer[3] = 0x00;
 328                 cb &= ~0x40;
 329                 if (params->std & V4L2_STD_ATSC) {
 330                         cb |= 0x40;
 331                         buffer[1] = 0x04;
 332                 }
 333                 /* set to the correct mode (analog or digital) */
 334                 tuneraddr = priv->i2c_props.addr;
 335                 priv->i2c_props.addr = 0x0a;
 336                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[0],2)))
 337                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 338                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[2],2)))
 339                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 340                 priv->i2c_props.addr = tuneraddr;
 341                 /* FIXME: input */
 342                 break;
 343         }
 344
 345         if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
 346                 buffer[0] = config;
 347                 buffer[1] = cb;
 348                 buffer[2] = (div>>8) & 0x7f;
 349                 buffer[3] = div      & 0xff;
 350         } else {
 351                 buffer[0] = (div>>8) & 0x7f;
 352                 buffer[1] = div      & 0xff;
 353                 buffer[2] = config;
 354                 buffer[3] = cb;
 355         }
 356         priv->last_div = div;
 357         if (t_params->has_tda9887) {
 358                 struct v4l2_priv_tun_config tda9887_cfg;
 359                 int config = 0;
 360                 int is_secam_l = (params->std & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC)) &&
 361                         !(params->std & ~(V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC));
 362
 363                 tda9887_cfg.tuner = TUNER_TDA9887;
 364                 tda9887_cfg.priv  = &config;
 365
 366                 if (params->std == V4L2_STD_SECAM_LC) {
 367                         if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
 368                                 config |= TDA9887_PORT1_ACTIVE;
 369                         if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
 370                                 config |= TDA9887_PORT2_ACTIVE;
 371                 }
 372                 else {
 373                         if (t_params->port1_active)
 374                                 config |= TDA9887_PORT1_ACTIVE;
 375                         if (t_params->port2_active)
 376                                 config |= TDA9887_PORT2_ACTIVE;
 377                 }
 378                 if (t_params->intercarrier_mode)
 379                         config |= TDA9887_INTERCARRIER;
 380                 if (is_secam_l) {
 381                         if (i == 0 && t_params->default_top_secam_low)
 382                                 config |= TDA9887_TOP(t_params->default_top_secam_low);
 383                         else if (i == 1 && t_params->default_top_secam_mid)
 384                                 config |= TDA9887_TOP(t_params->default_top_secam_mid);
 385                         else if (t_params->default_top_secam_high)
 386                                 config |= TDA9887_TOP(t_params->default_top_secam_high);
 387                 }
 388                 else {
 389                         if (i == 0 && t_params->default_top_low)
 390                                 config |= TDA9887_TOP(t_params->default_top_low);
 391                         else if (i == 1 && t_params->default_top_mid)
 392                                 config |= TDA9887_TOP(t_params->default_top_mid);
 393                         else if (t_params->default_top_high)
 394                                 config |= TDA9887_TOP(t_params->default_top_high);
 395                 }
 396                 if (t_params->default_pll_gating_18)
 397                         config |= TDA9887_GATING_18;
 398                 i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
 399                                     &tda9887_cfg);
 400         }
 401         tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 402                   buffer[0],buffer[1],buffer[2],buffer[3]);
 403
 404         if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 405                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 406
 407         switch (priv->type) {
 408         case TUNER_LG_TDVS_H06XF:
 409                 /* Set the Auxiliary Byte. */
 410                 buffer[0] = buffer[2];
 411                 buffer[0] &= ~0x20;
 412                 buffer[0] |= 0x18;
 413                 buffer[1] = 0x20;
 414                 tuner_dbg("tv 0x%02x 0x%02x\n",buffer[0],buffer[1]);
 415
 416                 if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,2)))
 417                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
 418                 break;
 419         case TUNER_MICROTUNE_4042FI5:
 420         {
 421                 // FIXME - this may also work for other tuners
 422                 unsigned long timeout = jiffies + msecs_to_jiffies(1);
 423                 u8 status_byte = 0;
 424
 425                 /* Wait until the PLL locks */
 426                 for (;;) {
 427                         if (time_after(jiffies,timeout))
 428                                 return 0;
 429                         if (1 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props,&status_byte,1))) {
 430                                 tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
 431                                 break;
 432                         }
 433                         if (status_byte & TUNER_PLL_LOCKED)
 434                                 break;
 435                         udelay(10);
 436                 }
 437
 438                 /* Set the charge pump for optimized phase noise figure */
 439                 config &= ~TUNER_CHARGE_PUMP;
 440                 buffer[0] = (div>>8) & 0x7f;
 441                 buffer[1] = div      & 0xff;
 442                 buffer[2] = config;
 443                 buffer[3] = cb;
 444                 tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
 445                           buffer[0],buffer[1],buffer[2],buffer[3]);
 446
 447                 if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 448                         tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 449                 break;
 450         }
 451         }
 452         return 0;
 453 }
 454
 455 static int simple_set_radio_freq(struct dvb_frontend *fe,
 456                                  struct analog_parameters *params)
 457 {
 458         struct tunertype *tun;
 459         struct tuner_simple_priv *priv = fe->tuner_priv;
 460         u8 buffer[4];
 461         u16 div;
 462         int rc, j;
 463         struct tuner_params *t_params;
 464         unsigned int freq = params->frequency;
 465
 466         tun = priv->tun;
 467
 468         for (j = tun->count-1; j > 0; j--)
 469                 if (tun->params[j].type == TUNER_PARAM_TYPE_RADIO)
 470                         break;
 471         /* default t_params (j=0) will be used if desired type wasn't found */
 472         t_params = &tun->params[j];
 473
 474         /* Select Radio 1st IF used */
 475         switch (t_params->radio_if) {
 476         case 0: /* 10.7 MHz */
 477                 freq += (unsigned int)(10.7*16000);
 478                 break;
 479         case 1: /* 33.3 MHz */
 480                 freq += (unsigned int)(33.3*16000);
 481                 break;
 482         case 2: /* 41.3 MHz */
 483                 freq += (unsigned int)(41.3*16000);
 484                 break;
 485         default:
 486                 tuner_warn("Unsupported radio_if value %d\n", t_params->radio_if);
 487                 return 0;
 488         }
 489
 490         /* Bandswitch byte */
 491         switch (priv->type) {
 492         case TUNER_TENA_9533_DI:
 493         case TUNER_YMEC_TVF_5533MF:
 494                 tuner_dbg("This tuner doesn't have FM. Most cards have a TEA5767 for FM\n");
 495                 return 0;
 496         case TUNER_PHILIPS_FM1216ME_MK3:
 497         case TUNER_PHILIPS_FM1236_MK3:
 498         case TUNER_PHILIPS_FMD1216ME_MK3:
 499         case TUNER_LG_NTSC_TAPE:
 500         case TUNER_PHILIPS_FM1256_IH3:
 501                 buffer[3] = 0x19;
 502                 break;
 503         case TUNER_TNF_5335MF:
 504                 buffer[3] = 0x11;
 505                 break;
 506         case TUNER_LG_PAL_FM:
 507                 buffer[3] = 0xa5;
 508                 break;
 509         case TUNER_THOMSON_DTT761X:
 510                 buffer[3] = 0x39;
 511                 break;
 512         case TUNER_MICROTUNE_4049FM5:
 513         default:
 514                 buffer[3] = 0xa4;
 515                 break;
 516         }
 517
 518         buffer[2] = (t_params->ranges[0].config & ~TUNER_RATIO_MASK) |
 519                     TUNER_RATIO_SELECT_50; /* 50 kHz step */
 520
 521         /* Convert from 1/16 kHz V4L steps to 1/20 MHz (=50 kHz) PLL steps
 522            freq * (1 Mhz / 16000 V4L steps) * (20 PLL steps / 1 MHz) =
 523            freq * (1/800) */
 524         div = (freq + 400) / 800;
 525
 526         if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
 527                 buffer[0] = buffer[2];
 528                 buffer[1] = buffer[3];
 529                 buffer[2] = (div>>8) & 0x7f;
 530                 buffer[3] = div      & 0xff;
 531         } else {
 532                 buffer[0] = (div>>8) & 0x7f;
 533                 buffer[1] = div      & 0xff;
 534         }
 535
 536         tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
 537                buffer[0],buffer[1],buffer[2],buffer[3]);
 538         priv->last_div = div;
 539
 540         if (t_params->has_tda9887) {
 541                 int config = 0;
 542                 struct v4l2_priv_tun_config tda9887_cfg;
 543
 544                 tda9887_cfg.tuner = TUNER_TDA9887;
 545                 tda9887_cfg.priv = &config;
 546
 547                 if (t_params->port1_active && !t_params->port1_fm_high_sensitivity)
 548                         config |= TDA9887_PORT1_ACTIVE;
 549                 if (t_params->port2_active && !t_params->port2_fm_high_sensitivity)
 550                         config |= TDA9887_PORT2_ACTIVE;
 551                 if (t_params->intercarrier_mode)
 552                         config |= TDA9887_INTERCARRIER;
 553 /*              if (t_params->port1_set_for_fm_mono)
 554                         config &= ~TDA9887_PORT1_ACTIVE;*/
 555                 if (t_params->fm_gain_normal)
 556                         config |= TDA9887_GAIN_NORMAL;
 557                 if (t_params->radio_if == 2)
 558                         config |= TDA9887_RIF_41_3;
 559                 i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
 560                                         &tda9887_cfg);
 561         }
 562         if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
 563                 tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
 564
 565         return 0;
 566 }
 567
 568 static int simple_set_params(struct dvb_frontend *fe,
 569                              struct analog_parameters *params)
 570 {
 571         struct tuner_simple_priv *priv = fe->tuner_priv;
 572         int ret = -EINVAL;
 573
 574         switch (params->mode) {
 575         case V4L2_TUNER_RADIO:
 576                 ret = simple_set_radio_freq(fe, params);
 577                 priv->frequency = params->frequency * 125 / 2;
 578                 break;
 579         case V4L2_TUNER_ANALOG_TV:
 580         case V4L2_TUNER_DIGITAL_TV:
 581                 ret = simple_set_tv_freq(fe, params);
 582                 priv->frequency = params->frequency * 62500;
 583                 break;
 584         }
 585
 586         return ret;
 587 }
 588
 589
 590 static int simple_release(struct dvb_frontend *fe)
 591 {
 592         kfree(fe->tuner_priv);
 593         fe->tuner_priv = NULL;
 594
 595         return 0;
 596 }
 597
 598 static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 599 {
 600         struct tuner_simple_priv *priv = fe->tuner_priv;
 601         *frequency = priv->frequency;
 602         return 0;
 603 }
 604
 605 static struct dvb_tuner_ops simple_tuner_ops = {
 606         .set_analog_params = simple_set_params,
 607         .release           = simple_release,
 608         .get_frequency     = simple_get_frequency,
 609         .get_status        = simple_get_status,
 610         .get_rf_strength   = simple_get_rf_strength,
 611 };
 612
 613 struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
 614                                          struct i2c_adapter *i2c_adap,
 615                                          u8 i2c_addr,
 616                                          struct simple_tuner_config *cfg)
 617 {
 618         struct tuner_simple_priv *priv = NULL;
 619
 620         priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
 621         if (priv == NULL)
 622                 return NULL;
 623         fe->tuner_priv = priv;
 624
 625         priv->i2c_props.addr = i2c_addr;
 626         priv->i2c_props.adap = i2c_adap;
 627         priv->type = cfg->type;
 628         priv->tun  = cfg->tun;
 629
 630         memcpy(&fe->ops.tuner_ops, &simple_tuner_ops, sizeof(struct dvb_tuner_ops));
 631
 632         tuner_info("type set to %d (%s)\n", cfg->type, cfg->tun->name);
 633
 634         strlcpy(fe->ops.tuner_ops.info.name, cfg->tun->name, sizeof(fe->ops.tuner_ops.info.name));
 635
 636         return fe;
 637 }
 638
 639
 640 EXPORT_SYMBOL_GPL(simple_tuner_attach);
 641
 642 MODULE_DESCRIPTION("Simple 4-control-bytes style tuner driver");
 643 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
 644 MODULE_LICENSE("GPL");
 645
 646 /*
 647  * Overrides for Emacs so that we follow Linus's tabbing style.
 648  * ---------------------------------------------------------------------------
 649  * Local variables:
 650  * c-basic-offset: 8
 651  * End:
 652  */