drivers/media/video/tuner-core.c

   1 /*
   2  * $Id: tuner-core.c,v 1.58 2005/07/14 03:06:43 mchehab Exp $
   3  *
   4  * i2c tv tuner chip device driver
   5  * core core, i.e. kernel interfaces, registering and so on
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/moduleparam.h>
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <linux/string.h>
  13 #include <linux/timer.h>
  14 #include <linux/delay.h>
  15 #include <linux/errno.h>
  16 #include <linux/slab.h>
  17 #include <linux/poll.h>
  18 #include <linux/i2c.h>
  19 #include <linux/types.h>
  20 #include <linux/videodev.h>
  21 #include <linux/init.h>
  22
  23 #include <media/tuner.h>
  24 #include <media/audiochip.h>
  25
  26 #define UNSET (-1U)
  27
  28 /* standard i2c insmod options */
  29 static unsigned short normal_i2c[] = {
  30         0x4b,                   /* tda8290 */
  31         0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
  32         0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
  33         I2C_CLIENT_END
  34 };
  35
  36 I2C_CLIENT_INSMOD;
  37
  38 /* insmod options used at init time => read/only */
  39 static unsigned int addr = 0;
  40 module_param(addr, int, 0444);
  41
  42 static unsigned int no_autodetect = 0;
  43 module_param(no_autodetect, int, 0444);
  44
  45 /* insmod options used at runtime => read/write */
  46 unsigned int tuner_debug = 0;
  47 module_param(tuner_debug, int, 0644);
  48
  49 static unsigned int tv_range[2] = { 44, 958 };
  50 static unsigned int radio_range[2] = { 65, 108 };
  51
  52 module_param_array(tv_range, int, NULL, 0644);
  53 module_param_array(radio_range, int, NULL, 0644);
  54
  55 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
  56 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
  57 MODULE_LICENSE("GPL");
  58
  59 static struct i2c_driver driver;
  60 static struct i2c_client client_template;
  61
  62 /* ---------------------------------------------------------------------- */
  63
  64 /* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
  65 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
  66 {
  67         struct tuner *t = i2c_get_clientdata(c);
  68
  69         if (t->type == UNSET) {
  70                 tuner_warn ("tuner type not set\n");
  71                 return;
  72         }
  73         if (NULL == t->tv_freq) {
  74                 tuner_warn ("Tuner has no way to set tv freq\n");
  75                 return;
  76         }
  77         if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
  78                 tuner_dbg ("TV freq (%d.%02d) out of range (%d-%d)\n",
  79                            freq / 16, freq % 16 * 100 / 16, tv_range[0],
  80                            tv_range[1]);
  81         }
  82         t->tv_freq(c, freq);
  83 }
  84
  85 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
  86 {
  87         struct tuner *t = i2c_get_clientdata(c);
  88
  89         if (t->type == UNSET) {
  90                 tuner_warn ("tuner type not set\n");
  91                 return;
  92         }
  93         if (NULL == t->radio_freq) {
  94                 tuner_warn ("tuner has no way to set radio frequency\n");
  95                 return;
  96         }
  97         if (freq <= radio_range[0] * 16000 || freq >= radio_range[1] * 16000) {
  98                 tuner_dbg ("radio freq (%d.%02d) out of range (%d-%d)\n",
  99                            freq / 16000, freq % 16000 * 100 / 16000,
 100                            radio_range[0], radio_range[1]);
 101         }
 102
 103         t->radio_freq(c, freq);
 104         return;
 105 }
 106
 107 static void set_freq(struct i2c_client *c, unsigned long freq)
 108 {
 109         struct tuner *t = i2c_get_clientdata(c);
 110
 111         switch (t->mode) {
 112         case V4L2_TUNER_RADIO:
 113                 tuner_dbg("radio freq set to %lu.%02lu\n",
 114                           freq / 16000, freq % 16000 * 100 / 16000);
 115                 set_radio_freq(c, freq);
 116                 break;
 117         case V4L2_TUNER_ANALOG_TV:
 118         case V4L2_TUNER_DIGITAL_TV:
 119                 tuner_dbg("tv freq set to %lu.%02lu\n",
 120                           freq / 16, freq % 16 * 100 / 16);
 121                 set_tv_freq(c, freq);
 122                 break;
 123         }
 124         t->freq = freq;
 125 }
 126
 127 static void set_type(struct i2c_client *c, unsigned int type,
 128                      unsigned int new_mode_mask)
 129 {
 130         struct tuner *t = i2c_get_clientdata(c);
 131         unsigned char buffer[4];
 132
 133         if (type == UNSET || type == TUNER_ABSENT) {
 134                 tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr);
 135                 return;
 136         }
 137
 138         if (type >= tuner_count) {
 139                 tuner_warn ("tuner 0x%02x: Tuner count greater than %d\n",c->addr,tuner_count);
 140                 return;
 141         }
 142
 143         /* This code detects calls by card attach_inform */
 144         if (NULL == t->i2c.dev.driver) {
 145                 tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);
 146
 147                 t->type=type;
 148                 return;
 149         }
 150
 151         t->type = type;
 152
 153         switch (t->type) {
 154         case TUNER_MT2032:
 155                 microtune_init(c);
 156                 break;
 157         case TUNER_PHILIPS_TDA8290:
 158                 tda8290_init(c);
 159                 break;
 160         case TUNER_TEA5767:
 161                 if (tea5767_tuner_init(c) == EINVAL) {
 162                         t->type = TUNER_ABSENT;
 163                         t->mode_mask = T_UNINITIALIZED;
 164                         return;
 165                 }
 166                 t->mode_mask = T_RADIO;
 167                 break;
 168         case TUNER_PHILIPS_FMD1216ME_MK3:
 169                 buffer[0] = 0x0b;
 170                 buffer[1] = 0xdc;
 171                 buffer[2] = 0x9c;
 172                 buffer[3] = 0x60;
 173                 i2c_master_send(c, buffer, 4);
 174                 mdelay(1);
 175                 buffer[2] = 0x86;
 176                 buffer[3] = 0x54;
 177                 i2c_master_send(c, buffer, 4);
 178                 default_tuner_init(c);
 179                 break;
 180         default:
 181                 default_tuner_init(c);
 182                 break;
 183         }
 184
 185         if (t->mode_mask == T_UNINITIALIZED)
 186                 t->mode_mask = new_mode_mask;
 187
 188         set_freq(c, t->freq);
 189         tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
 190                   c->adapter->name, c->driver->name, c->addr << 1, type,
 191                   t->mode_mask);
 192 }
 193
 194 /*
 195  * This function apply tuner config to tuner specified
 196  * by tun_setup structure. I addr is unset, then admin status
 197  * and tun addr status is more precise then current status,
 198  * it's applied. Otherwise status and type are applied only to
 199  * tuner with exactly the same addr.
 200 */
 201
 202 static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
 203 {
 204         struct tuner *t = i2c_get_clientdata(c);
 205
 206         if (tun_setup->addr == ADDR_UNSET) {
 207                 if (t->mode_mask & tun_setup->mode_mask)
 208                         set_type(c, tun_setup->type, tun_setup->mode_mask);
 209         } else if (tun_setup->addr == c->addr) {
 210                 set_type(c, tun_setup->type, tun_setup->mode_mask);
 211         }
 212 }
 213
 214 static inline int check_mode(struct tuner *t, char *cmd)
 215 {
 216         if (1 << t->mode & t->mode_mask) {
 217                 switch (t->mode) {
 218                 case V4L2_TUNER_RADIO:
 219                         tuner_dbg("Cmd %s accepted for radio\n", cmd);
 220                         break;
 221                 case V4L2_TUNER_ANALOG_TV:
 222                         tuner_dbg("Cmd %s accepted for analog TV\n", cmd);
 223                         break;
 224                 case V4L2_TUNER_DIGITAL_TV:
 225                         tuner_dbg("Cmd %s accepted for digital TV\n", cmd);
 226                         break;
 227                 }
 228                 return 0;
 229         }
 230         return EINVAL;
 231 }
 232
 233 static char pal[] = "-";
 234 module_param_string(pal, pal, sizeof(pal), 0644);
 235 static char secam[] = "-";
 236 module_param_string(secam, secam, sizeof(secam), 0644);
 237
 238 /* get more precise norm info from insmod option */
 239 static int tuner_fixup_std(struct tuner *t)
 240 {
 241         if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
 242                 switch (pal[0]) {
 243                 case 'b':
 244                 case 'B':
 245                 case 'g':
 246                 case 'G':
 247                         tuner_dbg ("insmod fixup: PAL => PAL-BG\n");
 248                         t->std = V4L2_STD_PAL_BG;
 249                         break;
 250                 case 'i':
 251                 case 'I':
 252                         tuner_dbg ("insmod fixup: PAL => PAL-I\n");
 253                         t->std = V4L2_STD_PAL_I;
 254                         break;
 255                 case 'd':
 256                 case 'D':
 257                 case 'k':
 258                 case 'K':
 259                         tuner_dbg ("insmod fixup: PAL => PAL-DK\n");
 260                         t->std = V4L2_STD_PAL_DK;
 261                         break;
 262                 case 'M':
 263                 case 'm':
 264                         tuner_dbg ("insmod fixup: PAL => PAL-M\n");
 265                         t->std = V4L2_STD_PAL_M;
 266                         break;
 267                 case 'N':
 268                 case 'n':
 269                         tuner_dbg ("insmod fixup: PAL => PAL-N\n");
 270                         t->std = V4L2_STD_PAL_N;
 271                         break;
 272                 }
 273         }
 274         if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 275                 switch (secam[0]) {
 276                 case 'd':
 277                 case 'D':
 278                 case 'k':
 279                 case 'K':
 280                         tuner_dbg ("insmod fixup: SECAM => SECAM-DK\n");
 281                         t->std = V4L2_STD_SECAM_DK;
 282                         break;
 283                 case 'l':
 284                 case 'L':
 285                         tuner_dbg ("insmod fixup: SECAM => SECAM-L\n");
 286                         t->std = V4L2_STD_SECAM_L;
 287                         break;
 288                 }
 289         }
 290
 291         return 0;
 292 }
 293
 294 /* ---------------------------------------------------------------------- */
 295
 296 /* static var Used only in tuner_attach and tuner_probe */
 297 static unsigned default_mode_mask;
 298
 299 /* During client attach, set_type is called by adapter's attach_inform callback.
 300    set_type must then be completed by tuner_attach.
 301  */
 302 static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
 303 {
 304         struct tuner *t;
 305
 306         client_template.adapter = adap;
 307         client_template.addr = addr;
 308
 309         t = kmalloc(sizeof(struct tuner), GFP_KERNEL);
 310         if (NULL == t)
 311                 return -ENOMEM;
 312         memset(t, 0, sizeof(struct tuner));
 313         memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
 314         i2c_set_clientdata(&t->i2c, t);
 315         t->type = UNSET;
 316         t->radio_if2 = 10700 * 1000;    /* 10.7MHz - FM radio */
 317         t->audmode = V4L2_TUNER_MODE_STEREO;
 318         t->mode_mask = T_UNINITIALIZED;
 319
 320
 321         tuner_info("chip found @ 0x%x (%s)\n", addr << 1, adap->name);
 322
 323         /* TEA5767 autodetection code - only for addr = 0xc0 */
 324         if (!no_autodetect) {
 325                 if (addr == 0x60) {
 326                         if (tea5767_autodetection(&t->i2c) != EINVAL) {
 327                                 t->type = TUNER_TEA5767;
 328                                 t->mode_mask = T_RADIO;
 329                                 t->mode = T_STANDBY;
 330                                 t->freq = 87.5 * 16; /* Sets freq to FM range */
 331                                 default_mode_mask &= ~T_RADIO;
 332
 333                                 i2c_attach_client (&t->i2c);
 334                                 set_type(&t->i2c,t->type, t->mode_mask);
 335                                 return 0;
 336                         }
 337                 }
 338         }
 339
 340         /* Initializes only the first adapter found */
 341         if (default_mode_mask != T_UNINITIALIZED) {
 342                 tuner_dbg ("Setting mode_mask to 0x%02x\n", default_mode_mask);
 343                 t->mode_mask = default_mode_mask;
 344                 t->freq = 400 * 16; /* Sets freq to VHF High */
 345                 default_mode_mask = T_UNINITIALIZED;
 346         }
 347
 348         /* Should be just before return */
 349         i2c_attach_client (&t->i2c);
 350         set_type (&t->i2c,t->type, t->mode_mask);
 351         return 0;
 352 }
 353
 354 static int tuner_probe(struct i2c_adapter *adap)
 355 {
 356         if (0 != addr) {
 357                 normal_i2c[0] = addr;
 358                 normal_i2c[1] = I2C_CLIENT_END;
 359         }
 360
 361         default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
 362
 363         if (adap->class & I2C_CLASS_TV_ANALOG)
 364                 return i2c_probe(adap, &addr_data, tuner_attach);
 365         return 0;
 366 }
 367
 368 static int tuner_detach(struct i2c_client *client)
 369 {
 370         struct tuner *t = i2c_get_clientdata(client);
 371         int err;
 372
 373         err = i2c_detach_client(&t->i2c);
 374         if (err) {
 375                 tuner_warn
 376                     ("Client deregistration failed, client not detached.\n");
 377                 return err;
 378         }
 379
 380         kfree(t);
 381         return 0;
 382 }
 383
 384 /*
 385  * Switch tuner to other mode. If tuner support both tv and radio,
 386  * set another frequency to some value (This is needed for some pal
 387  * tuners to avoid locking). Otherwise, just put second tuner in
 388  * standby mode.
 389  */
 390
 391 static inline int set_mode(struct i2c_client *client, struct tuner *t, int mode, char *cmd)
 392 {
 393         if (mode != t->mode) {
 394
 395                 t->mode = mode;
 396                 if (check_mode(t, cmd) == EINVAL) {
 397                         t->mode = T_STANDBY;
 398                         if (V4L2_TUNER_RADIO == mode) {
 399                                 set_tv_freq(client, 400 * 16);
 400                         } else {
 401                                 set_radio_freq(client, 87.5 * 16000);
 402                         }
 403                         return EINVAL;
 404                 }
 405         }
 406         return 0;
 407 }
 408
 409 #define switch_v4l2()   if (!t->using_v4l2) \
 410                             tuner_dbg("switching to v4l2\n"); \
 411                         t->using_v4l2 = 1;
 412
 413 static inline int check_v4l2(struct tuner *t)
 414 {
 415         if (t->using_v4l2) {
 416                 tuner_dbg ("ignore v4l1 call\n");
 417                 return EINVAL;
 418         }
 419         return 0;
 420 }
 421
 422 static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 423 {
 424         struct tuner *t = i2c_get_clientdata(client);
 425         unsigned int *iarg = (int *)arg;
 426
 427         switch (cmd) {
 428         /* --- configuration --- */
 429         case TUNER_SET_TYPE_ADDR:
 430                 tuner_dbg ("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x\n",
 431                                 ((struct tuner_setup *)arg)->type,
 432                                 ((struct tuner_setup *)arg)->addr,
 433                                 ((struct tuner_setup *)arg)->mode_mask);
 434
 435                 set_addr(client, (struct tuner_setup *)arg);
 436                 break;
 437         case AUDC_SET_RADIO:
 438                 set_mode(client,t,V4L2_TUNER_RADIO, "AUDC_SET_RADIO");
 439                 break;
 440         case AUDC_CONFIG_PINNACLE:
 441                 if (check_mode(t, "AUDC_CONFIG_PINNACLE") == EINVAL)
 442                         return 0;
 443                 switch (*iarg) {
 444                 case 2:
 445                         tuner_dbg("pinnacle pal\n");
 446                         t->radio_if2 = 33300 * 1000;
 447                         break;
 448                 case 3:
 449                         tuner_dbg("pinnacle ntsc\n");
 450                         t->radio_if2 = 41300 * 1000;
 451                         break;
 452                 }
 453                 break;
 454         case TDA9887_SET_CONFIG:
 455                 break;
 456         /* --- v4l ioctls --- */
 457         /* take care: bttv does userspace copying, we'll get a
 458            kernel pointer here... */
 459         case VIDIOCSCHAN:
 460                 {
 461                         static const v4l2_std_id map[] = {
 462                                 [VIDEO_MODE_PAL] = V4L2_STD_PAL,
 463                                 [VIDEO_MODE_NTSC] = V4L2_STD_NTSC_M,
 464                                 [VIDEO_MODE_SECAM] = V4L2_STD_SECAM,
 465                                 [4 /* bttv */ ] = V4L2_STD_PAL_M,
 466                                 [5 /* bttv */ ] = V4L2_STD_PAL_N,
 467                                 [6 /* bttv */ ] = V4L2_STD_NTSC_M_JP,
 468                         };
 469                         struct video_channel *vc = arg;
 470
 471                         if (check_v4l2(t) == EINVAL)
 472                                 return 0;
 473
 474                         if (set_mode(client,t,V4L2_TUNER_ANALOG_TV, "VIDIOCSCHAN")==EINVAL)
 475                                 return 0;
 476
 477                         if (vc->norm < ARRAY_SIZE(map))
 478                                 t->std = map[vc->norm];
 479                         tuner_fixup_std(t);
 480                         if (t->freq)
 481                                 set_tv_freq(client, t->freq);
 482                         return 0;
 483                 }
 484         case VIDIOCSFREQ:
 485                 {
 486                         unsigned long *v = arg;
 487
 488                         if (check_mode(t, "VIDIOCSFREQ") == EINVAL)
 489                                 return 0;
 490                         if (check_v4l2(t) == EINVAL)
 491                                 return 0;
 492
 493                         set_freq(client, *v);
 494                         return 0;
 495                 }
 496         case VIDIOCGTUNER:
 497                 {
 498                         struct video_tuner *vt = arg;
 499
 500                         if (check_mode(t, "VIDIOCGTUNER") == EINVAL)
 501                                 return 0;
 502                         if (check_v4l2(t) == EINVAL)
 503                                 return 0;
 504
 505                         if (V4L2_TUNER_RADIO == t->mode) {
 506                                 if (t->has_signal)
 507                                         vt->signal = t->has_signal(client);
 508                                 if (t->is_stereo) {
 509                                         if (t->is_stereo(client))
 510                                                 vt->flags |=
 511                                                     VIDEO_TUNER_STEREO_ON;
 512                                         else
 513                                                 vt->flags &=
 514                                                     ~VIDEO_TUNER_STEREO_ON;
 515                                 }
 516                                 vt->flags |= VIDEO_TUNER_LOW;   /* Allow freqs at 62.5 Hz */
 517
 518                                 vt->rangelow = radio_range[0] * 16000;
 519                                 vt->rangehigh = radio_range[1] * 16000;
 520
 521                         } else {
 522                                 vt->rangelow = tv_range[0] * 16;
 523                                 vt->rangehigh = tv_range[1] * 16;
 524                         }
 525
 526                         return 0;
 527                 }
 528         case VIDIOCGAUDIO:
 529                 {
 530                         struct video_audio *va = arg;
 531
 532                         if (check_mode(t, "VIDIOCGAUDIO") == EINVAL)
 533                                 return 0;
 534                         if (check_v4l2(t) == EINVAL)
 535                                 return 0;
 536
 537                         if (V4L2_TUNER_RADIO == t->mode && t->is_stereo)
 538                                 va->mode = t->is_stereo(client)
 539                                     ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
 540                         return 0;
 541                 }
 542
 543         case VIDIOC_S_STD:
 544                 {
 545                         v4l2_std_id *id = arg;
 546
 547                         if (set_mode (client, t, V4L2_TUNER_ANALOG_TV, "VIDIOC_S_STD")
 548                                         == EINVAL)
 549                                 return 0;
 550
 551                         switch_v4l2();
 552
 553                         t->std = *id;
 554                         tuner_fixup_std(t);
 555                         if (t->freq)
 556                                 set_freq(client, t->freq);
 557                         break;
 558                 }
 559         case VIDIOC_S_FREQUENCY:
 560                 {
 561                         struct v4l2_frequency *f = arg;
 562
 563                         t->freq = f->frequency;
 564                         switch_v4l2();
 565                         if (V4L2_TUNER_RADIO == f->type &&
 566                             V4L2_TUNER_RADIO != t->mode) {
 567                                 if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
 568                                             == EINVAL)
 569                                         return 0;
 570                         }
 571                         set_freq(client,t->freq);
 572
 573                         break;
 574                 }
 575         case VIDIOC_G_FREQUENCY:
 576                 {
 577                         struct v4l2_frequency *f = arg;
 578
 579                         if (check_mode(t, "VIDIOC_G_FREQUENCY") == EINVAL)
 580                                 return 0;
 581                         switch_v4l2();
 582                         f->type = t->mode;
 583                         f->frequency = t->freq;
 584                         break;
 585                 }
 586         case VIDIOC_G_TUNER:
 587                 {
 588                         struct v4l2_tuner *tuner = arg;
 589
 590                         if (check_mode(t, "VIDIOC_G_TUNER") == EINVAL)
 591                                 return 0;
 592                         switch_v4l2();
 593
 594                         if (V4L2_TUNER_RADIO == t->mode) {
 595
 596                                 if (t->has_signal)
 597                                         tuner->signal = t->has_signal(client);
 598
 599                                 if (t->is_stereo) {
 600                                         if (t->is_stereo(client)) {
 601                                                 tuner->rxsubchans =
 602                                                     V4L2_TUNER_SUB_STEREO |
 603                                                     V4L2_TUNER_SUB_MONO;
 604                                         } else {
 605                                                 tuner->rxsubchans =
 606                                                     V4L2_TUNER_SUB_MONO;
 607                                         }
 608                                 }
 609
 610                                 tuner->capability |=
 611                                     V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 612
 613                                 tuner->audmode = t->audmode;
 614
 615                                 tuner->rangelow = radio_range[0] * 16000;
 616                                 tuner->rangehigh = radio_range[1] * 16000;
 617                         } else {
 618                                 tuner->rangelow = tv_range[0] * 16;
 619                                 tuner->rangehigh = tv_range[1] * 16;
 620                         }
 621                         break;
 622                 }
 623         case VIDIOC_S_TUNER:
 624                 {
 625                         struct v4l2_tuner *tuner = arg;
 626
 627                         if (check_mode(t, "VIDIOC_S_TUNER") == EINVAL)
 628                                 return 0;
 629
 630                         switch_v4l2();
 631
 632                         if (V4L2_TUNER_RADIO == t->mode) {
 633                                 t->audmode = tuner->audmode;
 634                                 set_radio_freq(client, t->freq);
 635                         }
 636                         break;
 637                 }
 638         default:
 639                 tuner_dbg("Unimplemented IOCTL 0x%08x(dir=%d,tp=0x%02x,nr=%d,sz=%d)\n",
 640                                          cmd, _IOC_DIR(cmd), _IOC_TYPE(cmd),
 641                                         _IOC_NR(cmd), _IOC_SIZE(cmd));
 642                 break;
 643         }
 644
 645         return 0;
 646 }
 647
 648 static int tuner_suspend(struct device *dev, u32 state, u32 level)
 649 {
 650         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 651         struct tuner *t = i2c_get_clientdata (c);
 652
 653         tuner_dbg ("suspend\n");
 654         /* FIXME: power down ??? */
 655         return 0;
 656 }
 657
 658 static int tuner_resume(struct device *dev, u32 level)
 659 {
 660         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 661         struct tuner *t = i2c_get_clientdata (c);
 662
 663         tuner_dbg ("resume\n");
 664         if (t->freq)
 665                 set_freq(c, t->freq);
 666         return 0;
 667 }
 668
 669 /* ----------------------------------------------------------------------- */
 670
 671 static struct i2c_driver driver = {
 672         .owner = THIS_MODULE,
 673         .name = "tuner",
 674         .id = I2C_DRIVERID_TUNER,
 675         .flags = I2C_DF_NOTIFY,
 676         .attach_adapter = tuner_probe,
 677         .detach_client = tuner_detach,
 678         .command = tuner_command,
 679         .driver = {
 680                    .suspend = tuner_suspend,
 681                    .resume = tuner_resume,
 682                    },
 683 };
 684 static struct i2c_client client_template = {
 685         I2C_DEVNAME("(tuner unset)"),
 686         .flags = I2C_CLIENT_ALLOW_USE,
 687         .driver = &driver,
 688 };
 689
 690 static int __init tuner_init_module(void)
 691 {
 692         return i2c_add_driver(&driver);
 693 }
 694
 695 static void __exit tuner_cleanup_module(void)
 696 {
 697         i2c_del_driver(&driver);
 698 }
 699
 700 module_init(tuner_init_module);
 701 module_exit(tuner_cleanup_module);
 702
 703 /*
 704  * Overrides for Emacs so that we follow Linus's tabbing style.
 705  * ---------------------------------------------------------------------------
 706  * Local variables:
 707  * c-basic-offset: 8
 708  * End:
 709  */