git.oblomov.eu Git - linux-2.6/blob - 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/v4l2-common.h>
  24 #include <media/audiochip.h>
  25
  26 #define UNSET (-1U)
  27
  28 /* standard i2c insmod options */
  29 static unsigned short normal_i2c[] = {
  30         0x42, 0x43, 0x4a, 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 static unsigned int no_autodetect = 0;
  41 static unsigned int show_i2c = 0;
  42
  43 /* insmod options used at runtime => read/write */
  44 static unsigned int tuner_debug = 0;
  45 int debug = 0;
  46
  47 static unsigned int tv_range[2] = { 44, 958 };
  48 static unsigned int radio_range[2] = { 65, 108 };
  49
  50 static char pal[] = "--";
  51 static char secam[] = "--";
  52 static char ntsc[] = "-";
  53
  54 module_param(addr, int, 0444);
  55 module_param(no_autodetect, int, 0444);
  56 module_param(show_i2c, int, 0444);
  57 /* Note: tuner_debug is deprecated and will be removed in 2.6.17 */
  58 module_param(tuner_debug, int, 0444);
  59 module_param(debug, int, 0644);
  60
  61 module_param_string(pal, pal, sizeof(pal), 0644);
  62 module_param_string(secam, secam, sizeof(secam), 0644);
  63 module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
  64 module_param_array(tv_range, int, NULL, 0644);
  65 module_param_array(radio_range, int, NULL, 0644);
  66
  67 MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
  68 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
  69 MODULE_LICENSE("GPL");
  70
  71 static struct i2c_driver driver;
  72 static struct i2c_client client_template;
  73
  74 /* ---------------------------------------------------------------------- */
  75
  76 /* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
  77 static void set_tv_freq(struct i2c_client *c, unsigned int freq)
  78 {
  79         struct tuner *t = i2c_get_clientdata(c);
  80
  81         if (t->type == UNSET) {
  82                 tuner_warn ("tuner type not set\n");
  83                 return;
  84         }
  85         if (NULL == t->tv_freq) {
  86                 tuner_warn ("Tuner has no way to set tv freq\n");
  87                 return;
  88         }
  89         if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
  90                 tuner_dbg ("TV freq (%d.%02d) out of range (%d-%d)\n",
  91                            freq / 16, freq % 16 * 100 / 16, tv_range[0],
  92                            tv_range[1]);
  93         }
  94         t->tv_freq(c, freq);
  95 }
  96
  97 static void set_radio_freq(struct i2c_client *c, unsigned int freq)
  98 {
  99         struct tuner *t = i2c_get_clientdata(c);
 100
 101         if (t->type == UNSET) {
 102                 tuner_warn ("tuner type not set\n");
 103                 return;
 104         }
 105         if (NULL == t->radio_freq) {
 106                 tuner_warn ("tuner has no way to set radio frequency\n");
 107                 return;
 108         }
 109         if (freq <= radio_range[0] * 16000 || freq >= radio_range[1] * 16000) {
 110                 tuner_dbg ("radio freq (%d.%02d) out of range (%d-%d)\n",
 111                            freq / 16000, freq % 16000 * 100 / 16000,
 112                            radio_range[0], radio_range[1]);
 113         }
 114
 115         t->radio_freq(c, freq);
 116         return;
 117 }
 118
 119 static void set_freq(struct i2c_client *c, unsigned long freq)
 120 {
 121         struct tuner *t = i2c_get_clientdata(c);
 122
 123         switch (t->mode) {
 124         case V4L2_TUNER_RADIO:
 125                 tuner_dbg("radio freq set to %lu.%02lu\n",
 126                           freq / 16000, freq % 16000 * 100 / 16000);
 127                 set_radio_freq(c, freq);
 128                 break;
 129         case V4L2_TUNER_ANALOG_TV:
 130         case V4L2_TUNER_DIGITAL_TV:
 131                 tuner_dbg("tv freq set to %lu.%02lu\n",
 132                           freq / 16, freq % 16 * 100 / 16);
 133                 set_tv_freq(c, freq);
 134                 break;
 135         }
 136         t->freq = freq;
 137 }
 138
 139 static void set_type(struct i2c_client *c, unsigned int type,
 140                      unsigned int new_mode_mask)
 141 {
 142         struct tuner *t = i2c_get_clientdata(c);
 143         unsigned char buffer[4];
 144
 145         if (type == UNSET || type == TUNER_ABSENT) {
 146                 tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr);
 147                 return;
 148         }
 149
 150         if (type >= tuner_count) {
 151                 tuner_warn ("tuner 0x%02x: Tuner count greater than %d\n",c->addr,tuner_count);
 152                 return;
 153         }
 154
 155         /* This code detects calls by card attach_inform */
 156         if (NULL == t->i2c.dev.driver) {
 157                 tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);
 158
 159                 t->type=type;
 160                 return;
 161         }
 162
 163         t->type = type;
 164
 165         switch (t->type) {
 166         case TUNER_MT2032:
 167                 microtune_init(c);
 168                 break;
 169         case TUNER_PHILIPS_TDA8290:
 170                 tda8290_init(c);
 171                 break;
 172         case TUNER_TEA5767:
 173                 if (tea5767_tuner_init(c) == EINVAL) {
 174                         t->type = TUNER_ABSENT;
 175                         t->mode_mask = T_UNINITIALIZED;
 176                         return;
 177                 }
 178                 t->mode_mask = T_RADIO;
 179                 break;
 180         case TUNER_PHILIPS_FMD1216ME_MK3:
 181                 buffer[0] = 0x0b;
 182                 buffer[1] = 0xdc;
 183                 buffer[2] = 0x9c;
 184                 buffer[3] = 0x60;
 185                 i2c_master_send(c, buffer, 4);
 186                 mdelay(1);
 187                 buffer[2] = 0x86;
 188                 buffer[3] = 0x54;
 189                 i2c_master_send(c, buffer, 4);
 190                 default_tuner_init(c);
 191                 break;
 192         case TUNER_LG_TDVS_H062F:
 193                 /* Set the Auxiliary Byte. */
 194                 buffer[2] &= ~0x20;
 195                 buffer[2] |= 0x18;
 196                 buffer[3] = 0x20;
 197                 i2c_master_send(c, buffer, 4);
 198                 default_tuner_init(c);
 199                 break;
 200         case TUNER_PHILIPS_TD1316:
 201                 buffer[0] = 0x0b;
 202                 buffer[1] = 0xdc;
 203                 buffer[2] = 0x86;
 204                 buffer[3] = 0xa4;
 205                 i2c_master_send(c,buffer,4);
 206                 default_tuner_init(c);
 207         default:
 208                 default_tuner_init(c);
 209                 break;
 210         }
 211
 212         if (t->mode_mask == T_UNINITIALIZED)
 213                 t->mode_mask = new_mode_mask;
 214
 215         set_freq(c, t->freq);
 216         tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
 217                   c->adapter->name, c->driver->driver.name, c->addr << 1, type,
 218                   t->mode_mask);
 219 }
 220
 221 /*
 222  * This function apply tuner config to tuner specified
 223  * by tun_setup structure. I addr is unset, then admin status
 224  * and tun addr status is more precise then current status,
 225  * it's applied. Otherwise status and type are applied only to
 226  * tuner with exactly the same addr.
 227 */
 228
 229 static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
 230 {
 231         struct tuner *t = i2c_get_clientdata(c);
 232
 233         if ( t->type == UNSET && ((tun_setup->addr == ADDR_UNSET &&
 234                 (t->mode_mask & tun_setup->mode_mask)) ||
 235                 tun_setup->addr == c->addr)) {
 236                         set_type(c, tun_setup->type, tun_setup->mode_mask);
 237         }
 238 }
 239
 240 static inline int check_mode(struct tuner *t, char *cmd)
 241 {
 242         if ((1 << t->mode & t->mode_mask) == 0) {
 243                 return EINVAL;
 244         }
 245
 246         switch (t->mode) {
 247         case V4L2_TUNER_RADIO:
 248                 tuner_dbg("Cmd %s accepted for radio\n", cmd);
 249                 break;
 250         case V4L2_TUNER_ANALOG_TV:
 251                 tuner_dbg("Cmd %s accepted for analog TV\n", cmd);
 252                 break;
 253         case V4L2_TUNER_DIGITAL_TV:
 254                 tuner_dbg("Cmd %s accepted for digital TV\n", cmd);
 255                 break;
 256         }
 257         return 0;
 258 }
 259
 260 /* get more precise norm info from insmod option */
 261 static int tuner_fixup_std(struct tuner *t)
 262 {
 263         if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
 264                 switch (pal[0]) {
 265                 case 'b':
 266                 case 'B':
 267                 case 'g':
 268                 case 'G':
 269                         tuner_dbg ("insmod fixup: PAL => PAL-BG\n");
 270                         t->std = V4L2_STD_PAL_BG;
 271                         break;
 272                 case 'i':
 273                 case 'I':
 274                         tuner_dbg ("insmod fixup: PAL => PAL-I\n");
 275                         t->std = V4L2_STD_PAL_I;
 276                         break;
 277                 case 'd':
 278                 case 'D':
 279                 case 'k':
 280                 case 'K':
 281                         tuner_dbg ("insmod fixup: PAL => PAL-DK\n");
 282                         t->std = V4L2_STD_PAL_DK;
 283                         break;
 284                 case 'M':
 285                 case 'm':
 286                         tuner_dbg ("insmod fixup: PAL => PAL-M\n");
 287                         t->std = V4L2_STD_PAL_M;
 288                         break;
 289                 case 'N':
 290                 case 'n':
 291                         if (pal[1] == 'c' || pal[1] == 'C') {
 292                                 tuner_dbg("insmod fixup: PAL => PAL-Nc\n");
 293                                 t->std = V4L2_STD_PAL_Nc;
 294                         } else {
 295                                 tuner_dbg ("insmod fixup: PAL => PAL-N\n");
 296                                 t->std = V4L2_STD_PAL_N;
 297                         }
 298                         break;
 299                 case '-':
 300                         /* default parameter, do nothing */
 301                         break;
 302                 default:
 303                         tuner_warn ("pal= argument not recognised\n");
 304                         break;
 305                 }
 306         }
 307         if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
 308                 switch (secam[0]) {
 309                 case 'b':
 310                 case 'B':
 311                 case 'g':
 312                 case 'G':
 313                 case 'h':
 314                 case 'H':
 315                         tuner_dbg("insmod fixup: SECAM => SECAM-BGH\n");
 316                         t->std = V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H;
 317                         break;
 318                 case 'd':
 319                 case 'D':
 320                 case 'k':
 321                 case 'K':
 322                         tuner_dbg ("insmod fixup: SECAM => SECAM-DK\n");
 323                         t->std = V4L2_STD_SECAM_DK;
 324                         break;
 325                 case 'l':
 326                 case 'L':
 327                         if ((secam[1]=='C')||(secam[1]=='c')) {
 328                                 tuner_dbg ("insmod fixup: SECAM => SECAM-L'\n");
 329                                 t->std = V4L2_STD_SECAM_LC;
 330                         } else {
 331                                 tuner_dbg ("insmod fixup: SECAM => SECAM-L\n");
 332                                 t->std = V4L2_STD_SECAM_L;
 333                         }
 334                         break;
 335                 case '-':
 336                         /* default parameter, do nothing */
 337                         break;
 338                 default:
 339                         tuner_warn ("secam= argument not recognised\n");
 340                         break;
 341                 }
 342         }
 343
 344         if ((t->std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
 345                 switch (ntsc[0]) {
 346                 case 'm':
 347                 case 'M':
 348                         tuner_dbg("insmod fixup: NTSC => NTSC-M\n");
 349                         t->std = V4L2_STD_NTSC_M;
 350                         break;
 351                 case 'j':
 352                 case 'J':
 353                         tuner_dbg("insmod fixup: NTSC => NTSC_M_JP\n");
 354                         t->std = V4L2_STD_NTSC_M_JP;
 355                         break;
 356                 case '-':
 357                         /* default parameter, do nothing */
 358                         break;
 359                 default:
 360                         tuner_info("ntsc= argument not recognised\n");
 361                         break;
 362                 }
 363         }
 364         return 0;
 365 }
 366
 367 static void tuner_status(struct i2c_client *client)
 368 {
 369         struct tuner *t = i2c_get_clientdata(client);
 370         unsigned long freq, freq_fraction;
 371         const char *p;
 372
 373         switch (t->mode) {
 374                 case V4L2_TUNER_RADIO:      p = "radio"; break;
 375                 case V4L2_TUNER_ANALOG_TV:  p = "analog TV"; break;
 376                 case V4L2_TUNER_DIGITAL_TV: p = "digital TV"; break;
 377                 default: p = "undefined"; break;
 378         }
 379         if (t->mode == V4L2_TUNER_RADIO) {
 380                 freq = t->freq / 16000;
 381                 freq_fraction = (t->freq % 16000) * 100 / 16000;
 382         } else {
 383                 freq = t->freq / 16;
 384                 freq_fraction = (t->freq % 16) * 100 / 16;
 385         }
 386         tuner_info("Tuner mode:      %s\n", p);
 387         tuner_info("Frequency:       %lu.%02lu MHz\n", freq, freq_fraction);
 388         tuner_info("Standard:        0x%08llx\n", t->std);
 389         if (t->mode == V4L2_TUNER_RADIO) {
 390                 if (t->has_signal) {
 391                         tuner_info("Signal strength: %d\n", t->has_signal(client));
 392                 }
 393                 if (t->is_stereo) {
 394                         tuner_info("Stereo:          %s\n", t->is_stereo(client) ? "yes" : "no");
 395                 }
 396         }
 397 }
 398 /* ---------------------------------------------------------------------- */
 399
 400 /* static var Used only in tuner_attach and tuner_probe */
 401 static unsigned default_mode_mask;
 402
 403 /* During client attach, set_type is called by adapter's attach_inform callback.
 404    set_type must then be completed by tuner_attach.
 405  */
 406 static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
 407 {
 408         struct tuner *t;
 409
 410         client_template.adapter = adap;
 411         client_template.addr = addr;
 412
 413         t = kmalloc(sizeof(struct tuner), GFP_KERNEL);
 414         if (NULL == t)
 415                 return -ENOMEM;
 416         memset(t, 0, sizeof(struct tuner));
 417         memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
 418         i2c_set_clientdata(&t->i2c, t);
 419         t->type = UNSET;
 420         t->radio_if2 = 10700 * 1000;    /* 10.7MHz - FM radio */
 421         t->audmode = V4L2_TUNER_MODE_STEREO;
 422         t->mode_mask = T_UNINITIALIZED;
 423         if (tuner_debug) {
 424                 debug = tuner_debug;
 425                 printk(KERN_ERR "tuner: tuner_debug is deprecated and will be removed in 2.6.17.\n");
 426                 printk(KERN_ERR "tuner: use the debug option instead.\n");
 427         }
 428
 429         if (show_i2c) {
 430                 unsigned char buffer[16];
 431                 int i,rc;
 432
 433                 memset(buffer, 0, sizeof(buffer));
 434                 rc = i2c_master_recv(&t->i2c, buffer, sizeof(buffer));
 435                 tuner_info("I2C RECV = ");
 436                 for (i=0;i<rc;i++)
 437                         printk("%02x ",buffer[i]);
 438                 printk("\n");
 439         }
 440         /* TEA5767 autodetection code - only for addr = 0xc0 */
 441         if (!no_autodetect) {
 442                 switch (addr) {
 443                 case 0x42:
 444                 case 0x43:
 445                 case 0x4a:
 446                 case 0x4b:
 447                         /* If chip is not tda8290, don't register.
 448                            since it can be tda9887*/
 449                         if (tda8290_probe(&t->i2c) != 0) {
 450                                 tuner_dbg("chip at addr %x is not a tda8290\n", addr);
 451                                 kfree(t);
 452                                 return 0;
 453                         }
 454                         break;
 455                 case 0x60:
 456                         if (tea5767_autodetection(&t->i2c) != EINVAL) {
 457                                 t->type = TUNER_TEA5767;
 458                                 t->mode_mask = T_RADIO;
 459                                 t->mode = T_STANDBY;
 460                                 t->freq = 87.5 * 16; /* Sets freq to FM range */
 461                                 default_mode_mask &= ~T_RADIO;
 462
 463                                 goto register_client;
 464                         }
 465                         break;
 466                 }
 467         }
 468
 469         /* Initializes only the first adapter found */
 470         if (default_mode_mask != T_UNINITIALIZED) {
 471                 tuner_dbg ("Setting mode_mask to 0x%02x\n", default_mode_mask);
 472                 t->mode_mask = default_mode_mask;
 473                 t->freq = 400 * 16; /* Sets freq to VHF High */
 474                 default_mode_mask = T_UNINITIALIZED;
 475         }
 476
 477         /* Should be just before return */
 478 register_client:
 479         tuner_info("chip found @ 0x%x (%s)\n", addr << 1, adap->name);
 480         i2c_attach_client (&t->i2c);
 481         set_type (&t->i2c,t->type, t->mode_mask);
 482         return 0;
 483 }
 484
 485 static int tuner_probe(struct i2c_adapter *adap)
 486 {
 487         if (0 != addr) {
 488                 normal_i2c[0] = addr;
 489                 normal_i2c[1] = I2C_CLIENT_END;
 490         }
 491
 492         default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
 493
 494         if (adap->class & I2C_CLASS_TV_ANALOG)
 495                 return i2c_probe(adap, &addr_data, tuner_attach);
 496         return 0;
 497 }
 498
 499 static int tuner_detach(struct i2c_client *client)
 500 {
 501         struct tuner *t = i2c_get_clientdata(client);
 502         int err;
 503
 504         err = i2c_detach_client(&t->i2c);
 505         if (err) {
 506                 tuner_warn
 507                     ("Client deregistration failed, client not detached.\n");
 508                 return err;
 509         }
 510
 511         kfree(t);
 512         return 0;
 513 }
 514
 515 /*
 516  * Switch tuner to other mode. If tuner support both tv and radio,
 517  * set another frequency to some value (This is needed for some pal
 518  * tuners to avoid locking). Otherwise, just put second tuner in
 519  * standby mode.
 520  */
 521
 522 static inline int set_mode(struct i2c_client *client, struct tuner *t, int mode, char *cmd)
 523 {
 524         if (mode == t->mode)
 525                 return 0;
 526
 527         t->mode = mode;
 528
 529         if (check_mode(t, cmd) == EINVAL) {
 530                 t->mode = T_STANDBY;
 531                 if (t->standby)
 532                         t->standby (client);
 533                 return EINVAL;
 534         }
 535         return 0;
 536 }
 537
 538 #define switch_v4l2()   if (!t->using_v4l2) \
 539                             tuner_dbg("switching to v4l2\n"); \
 540                         t->using_v4l2 = 1;
 541
 542 static inline int check_v4l2(struct tuner *t)
 543 {
 544         if (t->using_v4l2) {
 545                 tuner_dbg ("ignore v4l1 call\n");
 546                 return EINVAL;
 547         }
 548         return 0;
 549 }
 550
 551 static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
 552 {
 553         struct tuner *t = i2c_get_clientdata(client);
 554
 555         if (debug>1)
 556                 v4l_i2c_print_ioctl(&(t->i2c),cmd);
 557
 558         switch (cmd) {
 559         /* --- configuration --- */
 560         case TUNER_SET_TYPE_ADDR:
 561                 tuner_dbg ("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x\n",
 562                                 ((struct tuner_setup *)arg)->type,
 563                                 ((struct tuner_setup *)arg)->addr,
 564                                 ((struct tuner_setup *)arg)->mode_mask);
 565
 566                 set_addr(client, (struct tuner_setup *)arg);
 567                 break;
 568         case AUDC_SET_RADIO:
 569                 set_mode(client,t,V4L2_TUNER_RADIO, "AUDC_SET_RADIO");
 570                 break;
 571         case TUNER_SET_STANDBY:
 572                 {
 573                         if (check_mode(t, "TUNER_SET_STANDBY") == EINVAL)
 574                                 return 0;
 575                         if (t->standby)
 576                                 t->standby (client);
 577                         break;
 578                 }
 579         case VIDIOCSAUDIO:
 580                 if (check_mode(t, "VIDIOCSAUDIO") == EINVAL)
 581                         return 0;
 582                 if (check_v4l2(t) == EINVAL)
 583                         return 0;
 584
 585                 /* Should be implemented, since bttv calls it */
 586                 tuner_dbg("VIDIOCSAUDIO not implemented.\n");
 587
 588                 break;
 589         /* --- v4l ioctls --- */
 590         /* take care: bttv does userspace copying, we'll get a
 591            kernel pointer here... */
 592         case VIDIOCSCHAN:
 593                 {
 594                         static const v4l2_std_id map[] = {
 595                                 [VIDEO_MODE_PAL] = V4L2_STD_PAL,
 596                                 [VIDEO_MODE_NTSC] = V4L2_STD_NTSC_M,
 597                                 [VIDEO_MODE_SECAM] = V4L2_STD_SECAM,
 598                                 [4 /* bttv */ ] = V4L2_STD_PAL_M,
 599                                 [5 /* bttv */ ] = V4L2_STD_PAL_N,
 600                                 [6 /* bttv */ ] = V4L2_STD_NTSC_M_JP,
 601                         };
 602                         struct video_channel *vc = arg;
 603
 604                         if (check_v4l2(t) == EINVAL)
 605                                 return 0;
 606
 607                         if (set_mode(client,t,V4L2_TUNER_ANALOG_TV, "VIDIOCSCHAN")==EINVAL)
 608                                 return 0;
 609
 610                         if (vc->norm < ARRAY_SIZE(map))
 611                                 t->std = map[vc->norm];
 612                         tuner_fixup_std(t);
 613                         if (t->freq)
 614                                 set_tv_freq(client, t->freq);
 615                         return 0;
 616                 }
 617         case VIDIOCSFREQ:
 618                 {
 619                         unsigned long *v = arg;
 620
 621                         if (check_mode(t, "VIDIOCSFREQ") == EINVAL)
 622                                 return 0;
 623                         if (check_v4l2(t) == EINVAL)
 624                                 return 0;
 625
 626                         set_freq(client, *v);
 627                         return 0;
 628                 }
 629         case VIDIOCGTUNER:
 630                 {
 631                         struct video_tuner *vt = arg;
 632
 633                         if (check_mode(t, "VIDIOCGTUNER") == EINVAL)
 634                                 return 0;
 635                         if (check_v4l2(t) == EINVAL)
 636                                 return 0;
 637
 638                         if (V4L2_TUNER_RADIO == t->mode) {
 639                                 if (t->has_signal)
 640                                         vt->signal = t->has_signal(client);
 641                                 if (t->is_stereo) {
 642                                         if (t->is_stereo(client))
 643                                                 vt->flags |=
 644                                                     VIDEO_TUNER_STEREO_ON;
 645                                         else
 646                                                 vt->flags &=
 647                                                     ~VIDEO_TUNER_STEREO_ON;
 648                                 }
 649                                 vt->flags |= VIDEO_TUNER_LOW;   /* Allow freqs at 62.5 Hz */
 650
 651                                 vt->rangelow = radio_range[0] * 16000;
 652                                 vt->rangehigh = radio_range[1] * 16000;
 653
 654                         } else {
 655                                 vt->rangelow = tv_range[0] * 16;
 656                                 vt->rangehigh = tv_range[1] * 16;
 657                         }
 658
 659                         return 0;
 660                 }
 661         case VIDIOCGAUDIO:
 662                 {
 663                         struct video_audio *va = arg;
 664
 665                         if (check_mode(t, "VIDIOCGAUDIO") == EINVAL)
 666                                 return 0;
 667                         if (check_v4l2(t) == EINVAL)
 668                                 return 0;
 669
 670                         if (V4L2_TUNER_RADIO == t->mode && t->is_stereo)
 671                                 va->mode = t->is_stereo(client)
 672                                     ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
 673                         return 0;
 674                 }
 675
 676         case VIDIOC_S_STD:
 677                 {
 678                         v4l2_std_id *id = arg;
 679
 680                         if (set_mode (client, t, V4L2_TUNER_ANALOG_TV, "VIDIOC_S_STD")
 681                                         == EINVAL)
 682                                 return 0;
 683
 684                         switch_v4l2();
 685
 686                         t->std = *id;
 687                         tuner_fixup_std(t);
 688                         if (t->freq)
 689                                 set_freq(client, t->freq);
 690                         break;
 691                 }
 692         case VIDIOC_S_FREQUENCY:
 693                 {
 694                         struct v4l2_frequency *f = arg;
 695
 696                         t->freq = f->frequency;
 697                         switch_v4l2();
 698                         if (V4L2_TUNER_RADIO == f->type &&
 699                             V4L2_TUNER_RADIO != t->mode) {
 700                                 if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
 701                                             == EINVAL)
 702                                         return 0;
 703                         }
 704                         set_freq(client,t->freq);
 705
 706                         break;
 707                 }
 708         case VIDIOC_G_FREQUENCY:
 709                 {
 710                         struct v4l2_frequency *f = arg;
 711
 712                         if (check_mode(t, "VIDIOC_G_FREQUENCY") == EINVAL)
 713                                 return 0;
 714                         switch_v4l2();
 715                         f->type = t->mode;
 716                         f->frequency = t->freq;
 717                         break;
 718                 }
 719         case VIDIOC_G_TUNER:
 720                 {
 721                         struct v4l2_tuner *tuner = arg;
 722
 723                         if (check_mode(t, "VIDIOC_G_TUNER") == EINVAL)
 724                                 return 0;
 725                         switch_v4l2();
 726
 727                         if (V4L2_TUNER_RADIO == t->mode) {
 728
 729                                 if (t->has_signal)
 730                                         tuner->signal = t->has_signal(client);
 731
 732                                 if (t->is_stereo) {
 733                                         if (t->is_stereo(client)) {
 734                                                 tuner->rxsubchans =
 735                                                     V4L2_TUNER_SUB_STEREO |
 736                                                     V4L2_TUNER_SUB_MONO;
 737                                         } else {
 738                                                 tuner->rxsubchans =
 739                                                     V4L2_TUNER_SUB_MONO;
 740                                         }
 741                                 }
 742
 743                                 tuner->capability |=
 744                                     V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 745
 746                                 tuner->audmode = t->audmode;
 747
 748                                 tuner->rangelow = radio_range[0] * 16000;
 749                                 tuner->rangehigh = radio_range[1] * 16000;
 750                         } else {
 751                                 tuner->rangelow = tv_range[0] * 16;
 752                                 tuner->rangehigh = tv_range[1] * 16;
 753                         }
 754                         break;
 755                 }
 756         case VIDIOC_S_TUNER:
 757                 {
 758                         struct v4l2_tuner *tuner = arg;
 759
 760                         if (check_mode(t, "VIDIOC_S_TUNER") == EINVAL)
 761                                 return 0;
 762
 763                         switch_v4l2();
 764
 765                         if (V4L2_TUNER_RADIO == t->mode) {
 766                                 t->audmode = tuner->audmode;
 767                                 set_radio_freq(client, t->freq);
 768                         }
 769                         break;
 770                 }
 771         case VIDIOC_LOG_STATUS:
 772                 tuner_status(client);
 773                 break;
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int tuner_suspend(struct device *dev, pm_message_t state)
 780 {
 781         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 782         struct tuner *t = i2c_get_clientdata (c);
 783
 784         tuner_dbg ("suspend\n");
 785         /* FIXME: power down ??? */
 786         return 0;
 787 }
 788
 789 static int tuner_resume(struct device *dev)
 790 {
 791         struct i2c_client *c = container_of (dev, struct i2c_client, dev);
 792         struct tuner *t = i2c_get_clientdata (c);
 793
 794         tuner_dbg ("resume\n");
 795         if (t->freq)
 796                 set_freq(c, t->freq);
 797         return 0;
 798 }
 799
 800 /* ----------------------------------------------------------------------- */
 801
 802 static struct i2c_driver driver = {
 803         .id = I2C_DRIVERID_TUNER,
 804         .attach_adapter = tuner_probe,
 805         .detach_client = tuner_detach,
 806         .command = tuner_command,
 807         .driver = {
 808                 .name    = "tuner",
 809                 .suspend = tuner_suspend,
 810                 .resume  = tuner_resume,
 811         },
 812 };
 813 static struct i2c_client client_template = {
 814         .name = "(tuner unset)",
 815         .driver = &driver,
 816 };
 817
 818 static int __init tuner_init_module(void)
 819 {
 820         return i2c_add_driver(&driver);
 821 }
 822
 823 static void __exit tuner_cleanup_module(void)
 824 {
 825         i2c_del_driver(&driver);
 826 }
 827
 828 module_init(tuner_init_module);
 829 module_exit(tuner_cleanup_module);
 830
 831 /*
 832  * Overrides for Emacs so that we follow Linus's tabbing style.
 833  * ---------------------------------------------------------------------------
 834  * Local variables:
 835  * c-basic-offset: 8
 836  * End:
 837  */