drivers/media/video/tuner-core.c

   1 /*
   2  *
   3  * i2c tv tuner chip device driver
   4  * core core, i.e. kernel interfaces, registering and so on
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/moduleparam.h>
   9 #include <linux/kernel.h>
  10 #include <linux/sched.h>
  11 #include <linux/string.h>
  12 #include <linux/timer.h>
  13 #include <linux/delay.h>
  14 #include <linux/errno.h>
  15 #include <linux/slab.h>
  16 #include <linux/poll.h>
  17 #include <linux/i2c.h>
  18 #include <linux/types.h>
  19 #include <linux/videodev.h>
  20 #include <linux/init.h>
  21
  22 #include <media/tuner.h>
  23 #include <media/audiochip.h>
  24
  25 #include "msp3400.h"
  26
  27 #define UNSET (-1U)
  28
  29 /* standard i2c insmod options */
  30 static unsigned short normal_i2c[] = {
  31         0x4b,                   /* tda8290 */
  32         0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
  33         0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
  34         I2C_CLIENT_END
  35 };
  36
  37 I2C_CLIENT_INSMOD;
  38
  39 /* insmod options used at init time => read/only */
  40 static unsigned int addr = 0;
  41 module_param(addr, int, 0444);
  42
  43 static unsigned int no_autodetect = 0;
  44 module_param(no_autodetect, int, 0444);
  45
  46 static unsigned int show_i2c = 0;
  47 module_param(show_i2c, int, 0444);
  48
  49 /* insmod options used at runtime => read/write */
  50 unsigned int tuner_debug = 0;
  51 module_param(tuner_debug, int, 0644);
  52
  53 static unsigned int tv_range[2] = { 44, 958 };
  54 static unsigned int radio_range[2] = { 65, 108 };
  55
  56 module_param_array(tv_range, int, NULL, 0644);
  57 module_param_array(radio_range, int, NULL, 0644);
  58
  59 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
  60 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
  61 MODULE_LICENSE("GPL");
  62
  63 static struct i2c_driver driver;
  64 static struct i2c_client client_template;
  65
  66 /* ---------------------------------------------------------------------- */
  67
  68 /* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
  69 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
  70 {
  71         struct tuner *t = i2c_get_clientdata(c);
  72
  73         if (t->type == UNSET) {
  74                 tuner_warn ("tuner type not set\n");
  75                 return;
  76         }
  77         if (NULL == t->tv_freq) {
  78                 tuner_warn ("Tuner has no way to set tv freq\n");
  79                 return;
  80         }
  81         if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
  82                 tuner_dbg ("TV freq (%d.%02d) out of range (%d-%d)\n",
  83                            freq / 16, freq % 16 * 100 / 16, tv_range[0],
  84                            tv_range[1]);
  85         }
  86         t->tv_freq(c, freq);
  87 }
  88
  89 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
  90 {
  91         struct tuner *t = i2c_get_clientdata(c);
  92
  93         if (t->type == UNSET) {
  94                 tuner_warn ("tuner type not set\n");
  95                 return;
  96         }
  97         if (NULL == t->radio_freq) {
  98                 tuner_warn ("tuner has no way to set radio frequency\n");
  99                 return;
 100         }
 101         if (freq <= radio_range[0] * 16000 || freq >= radio_range[1] * 16000) {
 102                 tuner_dbg ("radio freq (%d.%02d) out of range (%d-%d)\n",
 103                            freq / 16000, freq % 16000 * 100 / 16000,
 104                            radio_range[0], radio_range[1]);
 105         }
 106
 107         t->radio_freq(c, freq);
 108         return;
 109 }
 110
 111 static void set_freq(struct i2c_client *c, unsigned long freq)
 112 {
 113         struct tuner *t = i2c_get_clientdata(c);
 114
 115         switch (t->mode) {
 116         case V4L2_TUNER_RADIO:
 117                 tuner_dbg("radio freq set to %lu.%02lu\n",
 118                           freq / 16000, freq % 16000 * 100 / 16000);
 119                 set_radio_freq(c, freq);
 120                 break;
 121         case V4L2_TUNER_ANALOG_TV:
 122         case V4L2_TUNER_DIGITAL_TV:
 123                 tuner_dbg("tv freq set to %lu.%02lu\n",
 124                           freq / 16, freq % 16 * 100 / 16);
 125                 set_tv_freq(c, freq);
 126                 break;
 127         }
 128         t->freq = freq;
 129 }
 130
 131 static void set_type(struct i2c_client *c, unsigned int type,
 132                      unsigned int new_mode_mask)
 133 {
 134         struct tuner *t = i2c_get_clientdata(c);
 135         unsigned char buffer[4];
 136
 137         if (type == UNSET || type == TUNER_ABSENT) {
 138                 tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr);
 139                 return;
 140         }
 141
 142         if (type >= tuner_count) {
 143                 tuner_warn ("tuner 0x%02x: Tuner count greater than %d\n",c->addr,tuner_count);
 144                 return;
 145         }
 146
 147         /* This code detects calls by card attach_inform */
 148         if (NULL == t->i2c.dev.driver) {
 149                 tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);
 150
 151                 t->type=type;
 152                 return;
 153         }
 154
 155         t->type = type;
 156
 157         switch (t->type) {
 158         case TUNER_MT2032:
 159                 microtune_init(c);
 160                 break;
 161         case TUNER_PHILIPS_TDA8290:
 162                 tda8290_init(c);
 163                 break;
 164         case TUNER_TEA5767:
 165                 if (tea5767_tuner_init(c) == EINVAL) {
 166                         t->type = TUNER_ABSENT;
 167                         t->mode_mask = T_UNINITIALIZED;
 168                         return;
 169                 }
 170                 t->mode_mask = T_RADIO;
 171                 break;
 172         case TUNER_PHILIPS_FMD1216ME_MK3:
 173                 buffer[0] = 0x0b;
 174                 buffer[1] = 0xdc;
 175                 buffer[2] = 0x9c;
 176                 buffer[3] = 0x60;
 177                 i2c_master_send(c, buffer, 4);
 178                 mdelay(1);
 179                 buffer[2] = 0x86;
 180                 buffer[3] = 0x54;
 181                 i2c_master_send(c, buffer, 4);
 182                 default_tuner_init(c);
 183                 break;
 184         case TUNER_LG_TDVS_H062F:
 185                 /* Set the Auxiliary Byte. */
 186                 buffer[2] &= ~0x20;
 187                 buffer[2] |= 0x18;
 188                 buffer[3] = 0x20;
 189                 i2c_master_send(c, buffer, 4);
 190                 default_tuner_init(c);
 191                 break;
 192         case TUNER_PHILIPS_TD1316:
 193                 buffer[0] = 0x0b;
 194                 buffer[1] = 0xdc;
 195                 buffer[2] = 0x86;
 196                 buffer[3] = 0xa4;
 197                 i2c_master_send(c,buffer,4);
 198                 default_tuner_init(c);
 199         default:
 200                 default_tuner_init(c);
 201                 break;
 202         }
 203
 204         if (t->mode_mask == T_UNINITIALIZED)
 205                 t->mode_mask = new_mode_mask;
 206
 207         set_freq(c, t->freq);
 208         tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
 209                   c->adapter->name, c->driver->name, c->addr << 1, type,
 210                   t->mode_mask);
 211 }
 212
 213 /*
 214  * This function apply tuner config to tuner specified
 215  * by tun_setup structure. I addr is unset, then admin status
 216  * and tun addr status is more precise then current status,
 217  * it's applied. Otherwise status and type are applied only to
 218  * tuner with exactly the same addr.
 219 */
 220
 221 static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
 222 {
 223         struct tuner *t = i2c_get_clientdata(c);
 224
 225         if ((tun_setup->addr == ADDR_UNSET &&
 226                 (t->mode_mask & tun_setup->mode_mask)) ||
 227                 tun_setup->addr == c->addr) {
 228                         set_type(c, tun_setup->type, tun_setup->mode_mask);
 229         }
 230 }
 231
 232 static inline int check_mode(struct tuner *t, char *cmd)
 233 {
 234         if ((1 << t->mode & t->mode_mask) == 0) {
 235                 return EINVAL;
 236         }
 237
 238         switch (t->mode) {
 239         case V4L2_TUNER_RADIO:
 240                 tuner_dbg("Cmd %s accepted for radio\n", cmd);
 241                 break;
 242         case V4L2_TUNER_ANALOG_TV:
 243                 tuner_dbg("Cmd %s accepted for analog TV\n", cmd);
 244                 break;
 245         case V4L2_TUNER_DIGITAL_TV:
 246                 tuner_dbg("Cmd %s accepted for digital TV\n", cmd);
 247                 break;
 248         }
 249         return 0;
 250 }
 251
 252 static char pal[] = "-";
 253 module_param_string(pal, pal, sizeof(pal), 0644);
 254 static char secam[] = "-";
 255 module_param_string(secam, secam, sizeof(secam), 0644);
 256
 257 /* get more precise norm info from insmod option */
 258 static int tuner_fixup_std(struct tuner *t)
 259 {
 260         if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
 261                 switch (pal[0]) {
 262                 case 'b':
 263                 case 'B':
 264                 case 'g':
 265                 case 'G':
 266                         tuner_dbg ("insmod fixup: PAL => PAL-BG\n");
 267                         t->std = V4L2_STD_PAL_BG;
 268                         break;
 269                 case 'i':
 270                 case 'I':
 271                         tuner_dbg ("insmod fixup: PAL => PAL-I\n");
 272                         t->std = V4L2_STD_PAL_I;
 273                         break;
 274                 case 'd':
 275                 case 'D':
 276                 case 'k':
 277                 case 'K':
 278                         tuner_dbg ("insmod fixup: PAL => PAL-DK\n");
 279                         t->std = V4L2_STD_PAL_DK;
 280                         break;
 281                 case 'M':
 282                 case 'm':
 283                         tuner_dbg ("insmod fixup: PAL => PAL-M\n");
 284                         t->std = V4L2_STD_PAL_M;
 285                         break;
 286                 case 'N':
 287                 case 'n':
 288                         tuner_dbg ("insmod fixup: PAL => PAL-N\n");
 289                         t->std = V4L2_STD_PAL_N;
 290                         break;
 291                 case '-':
 292                         /* default parameter, do nothing */
 293                         break;
 294                 default:
 295                         tuner_warn ("pal= argument not recognised\n");
 296                         break;
 297                 }
 298         }
 299         if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 300                 switch (secam[0]) {
 301                 case 'd':
 302                 case 'D':
 303                 case 'k':
 304                 case 'K':
 305                         tuner_dbg ("insmod fixup: SECAM => SECAM-DK\n");
 306                         t->std = V4L2_STD_SECAM_DK;
 307                         break;
 308                 case 'l':
 309                 case 'L':
 310                         tuner_dbg ("insmod fixup: SECAM => SECAM-L\n");
 311                         t->std = V4L2_STD_SECAM_L;
 312                         break;
 313                 case '-':
 314                         /* default parameter, do nothing */
 315                         break;
 316                 default:
 317                         tuner_warn ("secam= argument not recognised\n");
 318                         break;
 319                 }
 320         }
 321
 322         return 0;
 323 }
 324
 325 /* ---------------------------------------------------------------------- */
 326
 327 /* static var Used only in tuner_attach and tuner_probe */
 328 static unsigned default_mode_mask;
 329
 330 /* During client attach, set_type is called by adapter's attach_inform callback.
 331    set_type must then be completed by tuner_attach.
 332  */
 333 static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
 334 {
 335         struct tuner *t;
 336
 337         client_template.adapter = adap;
 338         client_template.addr = addr;
 339
 340         t = kmalloc(sizeof(struct tuner), GFP_KERNEL);
 341         if (NULL == t)
 342                 return -ENOMEM;
 343         memset(t, 0, sizeof(struct tuner));
 344         memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
 345         i2c_set_clientdata(&t->i2c, t);
 346         t->type = UNSET;
 347         t->radio_if2 = 10700 * 1000;    /* 10.7MHz - FM radio */
 348         t->audmode = V4L2_TUNER_MODE_STEREO;
 349         t->mode_mask = T_UNINITIALIZED;
 350
 351
 352         tuner_info("chip found @ 0x%x (%s)\n", addr << 1, adap->name);
 353
 354         if (show_i2c) {
 355                 unsigned char buffer[16];
 356                 int i,rc;
 357
 358                 memset(buffer, 0, sizeof(buffer));
 359                 rc = i2c_master_recv(&t->i2c, buffer, sizeof(buffer));
 360                 printk("tuner-%04x I2C RECV = ",addr);
 361                 for (i=0;i<rc;i++)
 362                         printk("%02x ",buffer[i]);
 363                 printk("\n");
 364         }
 365         /* TEA5767 autodetection code - only for addr = 0xc0 */
 366         if (!no_autodetect) {
 367                 if (addr == 0x60) {
 368                         if (tea5767_autodetection(&t->i2c) != EINVAL) {
 369                                 t->type = TUNER_TEA5767;
 370                                 t->mode_mask = T_RADIO;
 371                                 t->mode = T_STANDBY;
 372                                 t->freq = 87.5 * 16; /* Sets freq to FM range */
 373                                 default_mode_mask &= ~T_RADIO;
 374
 375                                 i2c_attach_client (&t->i2c);
 376                                 set_type(&t->i2c,t->type, t->mode_mask);
 377                                 return 0;
 378                         }
 379                 }
 380         }
 381
 382         /* Initializes only the first adapter found */
 383         if (default_mode_mask != T_UNINITIALIZED) {
 384                 tuner_dbg ("Setting mode_mask to 0x%02x\n", default_mode_mask);
 385                 t->mode_mask = default_mode_mask;
 386                 t->freq = 400 * 16; /* Sets freq to VHF High */
 387                 default_mode_mask = T_UNINITIALIZED;
 388         }
 389
 390         /* Should be just before return */
 391         i2c_attach_client (&t->i2c);
 392         set_type (&t->i2c,t->type, t->mode_mask);
 393         return 0;
 394 }
 395
 396 static int tuner_probe(struct i2c_adapter *adap)
 397 {
 398         if (0 != addr) {
 399                 normal_i2c[0] = addr;
 400                 normal_i2c[1] = I2C_CLIENT_END;
 401         }
 402
 403         default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
 404
 405         if (adap->class & I2C_CLASS_TV_ANALOG)
 406                 return i2c_probe(adap, &addr_data, tuner_attach);
 407         return 0;
 408 }
 409
 410 static int tuner_detach(struct i2c_client *client)
 411 {
 412         struct tuner *t = i2c_get_clientdata(client);
 413         int err;
 414
 415         err = i2c_detach_client(&t->i2c);
 416         if (err) {
 417                 tuner_warn
 418                     ("Client deregistration failed, client not detached.\n");
 419                 return err;
 420         }
 421
 422         kfree(t);
 423         return 0;
 424 }
 425
 426 /*
 427  * Switch tuner to other mode. If tuner support both tv and radio,
 428  * set another frequency to some value (This is needed for some pal
 429  * tuners to avoid locking). Otherwise, just put second tuner in
 430  * standby mode.
 431  */
 432
 433 static inline int set_mode(struct i2c_client *client, struct tuner *t, int mode, char *cmd)
 434 {
 435         if (mode == t->mode)
 436                 return 0;
 437
 438         t->mode = mode;
 439
 440         if (check_mode(t, cmd) == EINVAL) {
 441                 t->mode = T_STANDBY;
 442                 if (t->standby)
 443                         t->standby (client);
 444                 return EINVAL;
 445         }
 446         return 0;
 447 }
 448
 449 #define switch_v4l2()   if (!t->using_v4l2) \
 450                             tuner_dbg("switching to v4l2\n"); \
 451                         t->using_v4l2 = 1;
 452
 453 static inline int check_v4l2(struct tuner *t)
 454 {
 455         if (t->using_v4l2) {
 456                 tuner_dbg ("ignore v4l1 call\n");
 457                 return EINVAL;
 458         }
 459         return 0;
 460 }
 461
 462 static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 463 {
 464         struct tuner *t = i2c_get_clientdata(client);
 465         unsigned int *iarg = (int *)arg;
 466
 467         switch (cmd) {
 468         /* --- configuration --- */
 469         case TUNER_SET_TYPE_ADDR:
 470                 tuner_dbg ("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x\n",
 471                                 ((struct tuner_setup *)arg)->type,
 472                                 ((struct tuner_setup *)arg)->addr,
 473                                 ((struct tuner_setup *)arg)->mode_mask);
 474
 475                 set_addr(client, (struct tuner_setup *)arg);
 476                 break;
 477         case AUDC_SET_RADIO:
 478                 set_mode(client,t,V4L2_TUNER_RADIO, "AUDC_SET_RADIO");
 479                 break;
 480         case TUNER_SET_STANDBY:
 481                 {
 482                         if (check_mode(t, "TUNER_SET_STANDBY") == EINVAL)
 483                                 return 0;
 484                         if (t->standby)
 485                                 t->standby (client);
 486                         break;
 487                 }
 488         case AUDC_CONFIG_PINNACLE:
 489                 if (check_mode(t, "AUDC_CONFIG_PINNACLE") == EINVAL)
 490                         return 0;
 491                 switch (*iarg) {
 492                 case 2:
 493                         tuner_dbg("pinnacle pal\n");
 494                         t->radio_if2 = 33300 * 1000;
 495                         break;
 496                 case 3:
 497                         tuner_dbg("pinnacle ntsc\n");
 498                         t->radio_if2 = 41300 * 1000;
 499                         break;
 500                 }
 501                 break;
 502         case VIDIOCSAUDIO:
 503                 if (check_mode(t, "VIDIOCSAUDIO") == EINVAL)
 504                         return 0;
 505                 if (check_v4l2(t) == EINVAL)
 506                         return 0;
 507
 508                 /* Should be implemented, since bttv calls it */
 509                 tuner_dbg("VIDIOCSAUDIO not implemented.\n");
 510
 511                 break;
 512         case MSP_SET_MATRIX:
 513         case TDA9887_SET_CONFIG:
 514                 break;
 515         /* --- v4l ioctls --- */
 516         /* take care: bttv does userspace copying, we'll get a
 517            kernel pointer here... */
 518         case VIDIOCSCHAN:
 519                 {
 520                         static const v4l2_std_id map[] = {
 521                                 [VIDEO_MODE_PAL] = V4L2_STD_PAL,
 522                                 [VIDEO_MODE_NTSC] = V4L2_STD_NTSC_M,
 523                                 [VIDEO_MODE_SECAM] = V4L2_STD_SECAM,
 524                                 [4 /* bttv */ ] = V4L2_STD_PAL_M,
 525                                 [5 /* bttv */ ] = V4L2_STD_PAL_N,
 526                                 [6 /* bttv */ ] = V4L2_STD_NTSC_M_JP,
 527                         };
 528                         struct video_channel *vc = arg;
 529
 530                         if (check_v4l2(t) == EINVAL)
 531                                 return 0;
 532
 533                         if (set_mode(client,t,V4L2_TUNER_ANALOG_TV, "VIDIOCSCHAN")==EINVAL)
 534                                 return 0;
 535
 536                         if (vc->norm < ARRAY_SIZE(map))
 537                                 t->std = map[vc->norm];
 538                         tuner_fixup_std(t);
 539                         if (t->freq)
 540                                 set_tv_freq(client, t->freq);
 541                         return 0;
 542                 }
 543         case VIDIOCSFREQ:
 544                 {
 545                         unsigned long *v = arg;
 546
 547                         if (check_mode(t, "VIDIOCSFREQ") == EINVAL)
 548                                 return 0;
 549                         if (check_v4l2(t) == EINVAL)
 550                                 return 0;
 551
 552                         set_freq(client, *v);
 553                         return 0;
 554                 }
 555         case VIDIOCGTUNER:
 556                 {
 557                         struct video_tuner *vt = arg;
 558
 559                         if (check_mode(t, "VIDIOCGTUNER") == EINVAL)
 560                                 return 0;
 561                         if (check_v4l2(t) == EINVAL)
 562                                 return 0;
 563
 564                         if (V4L2_TUNER_RADIO == t->mode) {
 565                                 if (t->has_signal)
 566                                         vt->signal = t->has_signal(client);
 567                                 if (t->is_stereo) {
 568                                         if (t->is_stereo(client))
 569                                                 vt->flags |=
 570                                                     VIDEO_TUNER_STEREO_ON;
 571                                         else
 572                                                 vt->flags &=
 573                                                     ~VIDEO_TUNER_STEREO_ON;
 574                                 }
 575                                 vt->flags |= VIDEO_TUNER_LOW;   /* Allow freqs at 62.5 Hz */
 576
 577                                 vt->rangelow = radio_range[0] * 16000;
 578                                 vt->rangehigh = radio_range[1] * 16000;
 579
 580                         } else {
 581                                 vt->rangelow = tv_range[0] * 16;
 582                                 vt->rangehigh = tv_range[1] * 16;
 583                         }
 584
 585                         return 0;
 586                 }
 587         case VIDIOCGAUDIO:
 588                 {
 589                         struct video_audio *va = arg;
 590
 591                         if (check_mode(t, "VIDIOCGAUDIO") == EINVAL)
 592                                 return 0;
 593                         if (check_v4l2(t) == EINVAL)
 594                                 return 0;
 595
 596                         if (V4L2_TUNER_RADIO == t->mode && t->is_stereo)
 597                                 va->mode = t->is_stereo(client)
 598                                     ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
 599                         return 0;
 600                 }
 601
 602         case VIDIOC_S_STD:
 603                 {
 604                         v4l2_std_id *id = arg;
 605
 606                         if (set_mode (client, t, V4L2_TUNER_ANALOG_TV, "VIDIOC_S_STD")
 607                                         == EINVAL)
 608                                 return 0;
 609
 610                         switch_v4l2();
 611
 612                         t->std = *id;
 613                         tuner_fixup_std(t);
 614                         if (t->freq)
 615                                 set_freq(client, t->freq);
 616                         break;
 617                 }
 618         case VIDIOC_S_FREQUENCY:
 619                 {
 620                         struct v4l2_frequency *f = arg;
 621
 622                         t->freq = f->frequency;
 623                         switch_v4l2();
 624                         if (V4L2_TUNER_RADIO == f->type &&
 625                             V4L2_TUNER_RADIO != t->mode) {
 626                                 if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
 627                                             == EINVAL)
 628                                         return 0;
 629                         }
 630                         set_freq(client,t->freq);
 631
 632                         break;
 633                 }
 634         case VIDIOC_G_FREQUENCY:
 635                 {
 636                         struct v4l2_frequency *f = arg;
 637
 638                         if (check_mode(t, "VIDIOC_G_FREQUENCY") == EINVAL)
 639                                 return 0;
 640                         switch_v4l2();
 641                         f->type = t->mode;
 642                         f->frequency = t->freq;
 643                         break;
 644                 }
 645         case VIDIOC_G_TUNER:
 646                 {
 647                         struct v4l2_tuner *tuner = arg;
 648
 649                         if (check_mode(t, "VIDIOC_G_TUNER") == EINVAL)
 650                                 return 0;
 651                         switch_v4l2();
 652
 653                         if (V4L2_TUNER_RADIO == t->mode) {
 654
 655                                 if (t->has_signal)
 656                                         tuner->signal = t->has_signal(client);
 657
 658                                 if (t->is_stereo) {
 659                                         if (t->is_stereo(client)) {
 660                                                 tuner->rxsubchans =
 661                                                     V4L2_TUNER_SUB_STEREO |
 662                                                     V4L2_TUNER_SUB_MONO;
 663                                         } else {
 664                                                 tuner->rxsubchans =
 665                                                     V4L2_TUNER_SUB_MONO;
 666                                         }
 667                                 }
 668
 669                                 tuner->capability |=
 670                                     V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 671
 672                                 tuner->audmode = t->audmode;
 673
 674                                 tuner->rangelow = radio_range[0] * 16000;
 675                                 tuner->rangehigh = radio_range[1] * 16000;
 676                         } else {
 677                                 tuner->rangelow = tv_range[0] * 16;
 678                                 tuner->rangehigh = tv_range[1] * 16;
 679                         }
 680                         break;
 681                 }
 682         case VIDIOC_S_TUNER:
 683                 {
 684                         struct v4l2_tuner *tuner = arg;
 685
 686                         if (check_mode(t, "VIDIOC_S_TUNER") == EINVAL)
 687                                 return 0;
 688
 689                         switch_v4l2();
 690
 691                         if (V4L2_TUNER_RADIO == t->mode) {
 692                                 t->audmode = tuner->audmode;
 693                                 set_radio_freq(client, t->freq);
 694                         }
 695                         break;
 696                 }
 697         default:
 698                 tuner_dbg("Unimplemented IOCTL 0x%08x(dir=%d,tp=0x%02x,nr=%d,sz=%d)\n",
 699                                          cmd, _IOC_DIR(cmd), _IOC_TYPE(cmd),
 700                                         _IOC_NR(cmd), _IOC_SIZE(cmd));
 701                 break;
 702         }
 703
 704         return 0;
 705 }
 706
 707 static int tuner_suspend(struct device *dev, pm_message_t state)
 708 {
 709         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 710         struct tuner *t = i2c_get_clientdata (c);
 711
 712         tuner_dbg ("suspend\n");
 713         /* FIXME: power down ??? */
 714         return 0;
 715 }
 716
 717 static int tuner_resume(struct device *dev)
 718 {
 719         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 720         struct tuner *t = i2c_get_clientdata (c);
 721
 722         tuner_dbg ("resume\n");
 723         if (t->freq)
 724                 set_freq(c, t->freq);
 725         return 0;
 726 }
 727
 728 /* ----------------------------------------------------------------------- */
 729
 730 static struct i2c_driver driver = {
 731         .owner = THIS_MODULE,
 732         .name = "tuner",
 733         .id = I2C_DRIVERID_TUNER,
 734         .flags = I2C_DF_NOTIFY,
 735         .attach_adapter = tuner_probe,
 736         .detach_client = tuner_detach,
 737         .command = tuner_command,
 738         .driver = {
 739                    .suspend = tuner_suspend,
 740                    .resume = tuner_resume,
 741                    },
 742 };
 743 static struct i2c_client client_template = {
 744         .name = "(tuner unset)",
 745         .flags = I2C_CLIENT_ALLOW_USE,
 746         .driver = &driver,
 747 };
 748
 749 static int __init tuner_init_module(void)
 750 {
 751         return i2c_add_driver(&driver);
 752 }
 753
 754 static void __exit tuner_cleanup_module(void)
 755 {
 756         i2c_del_driver(&driver);
 757 }
 758
 759 module_init(tuner_init_module);
 760 module_exit(tuner_cleanup_module);
 761
 762 /*
 763  * Overrides for Emacs so that we follow Linus's tabbing style.
 764  * ---------------------------------------------------------------------------
 765  * Local variables:
 766  * c-basic-offset: 8
 767  * End:
 768  */