drivers/media/radio/radio-tea5764.c

   1 /*
   2  * driver/media/radio/radio-tea5764.c
   3  *
   4  * Driver for TEA5764 radio chip for linux 2.6.
   5  * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola.
   6  * The I2C protocol is used for communicate with chip.
   7  *
   8  * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation
   9  *
  10  *  Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * History:
  27  * 2008-12-06   Fabio Belavenuto <belavenuto@gmail.com>
  28  *              initial code
  29  *
  30  * TODO:
  31  *  add platform_data support for IRQs platform dependencies
  32  *  add RDS support
  33  */
  34 #include <linux/kernel.h>
  35 #include <linux/slab.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>                 /* Initdata                     */
  38 #include <linux/videodev2.h>            /* kernel radio structs         */
  39 #include <linux/i2c.h>                  /* I2C                          */
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-ioctl.h>
  42
  43 #define DRIVER_VERSION  "0.0.2"
  44
  45 #define DRIVER_AUTHOR   "Fabio Belavenuto <belavenuto@gmail.com>"
  46 #define DRIVER_DESC     "A driver for the TEA5764 radio chip for EZX Phones."
  47
  48 #define PINFO(format, ...)\
  49         printk(KERN_INFO KBUILD_MODNAME ": "\
  50                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  51 #define PWARN(format, ...)\
  52         printk(KERN_WARNING KBUILD_MODNAME ": "\
  53                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  54 # define PDEBUG(format, ...)\
  55         printk(KERN_DEBUG KBUILD_MODNAME ": "\
  56                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  57
  58 /* Frequency limits in MHz -- these are European values.  For Japanese
  59 devices, that would be 76000 and 91000.  */
  60 #define FREQ_MIN  87500
  61 #define FREQ_MAX 108000
  62 #define FREQ_MUL 16
  63
  64 /* TEA5764 registers */
  65 #define TEA5764_MANID           0x002b
  66 #define TEA5764_CHIPID          0x5764
  67
  68 #define TEA5764_INTREG_BLMSK    0x0001
  69 #define TEA5764_INTREG_FRRMSK   0x0002
  70 #define TEA5764_INTREG_LEVMSK   0x0008
  71 #define TEA5764_INTREG_IFMSK    0x0010
  72 #define TEA5764_INTREG_BLMFLAG  0x0100
  73 #define TEA5764_INTREG_FRRFLAG  0x0200
  74 #define TEA5764_INTREG_LEVFLAG  0x0800
  75 #define TEA5764_INTREG_IFFLAG   0x1000
  76
  77 #define TEA5764_FRQSET_SUD      0x8000
  78 #define TEA5764_FRQSET_SM       0x4000
  79
  80 #define TEA5764_TNCTRL_PUPD1    0x8000
  81 #define TEA5764_TNCTRL_PUPD0    0x4000
  82 #define TEA5764_TNCTRL_BLIM     0x2000
  83 #define TEA5764_TNCTRL_SWPM     0x1000
  84 #define TEA5764_TNCTRL_IFCTC    0x0800
  85 #define TEA5764_TNCTRL_AFM      0x0400
  86 #define TEA5764_TNCTRL_SMUTE    0x0200
  87 #define TEA5764_TNCTRL_SNC      0x0100
  88 #define TEA5764_TNCTRL_MU       0x0080
  89 #define TEA5764_TNCTRL_SSL1     0x0040
  90 #define TEA5764_TNCTRL_SSL0     0x0020
  91 #define TEA5764_TNCTRL_HLSI     0x0010
  92 #define TEA5764_TNCTRL_MST      0x0008
  93 #define TEA5764_TNCTRL_SWP      0x0004
  94 #define TEA5764_TNCTRL_DTC      0x0002
  95 #define TEA5764_TNCTRL_AHLSI    0x0001
  96
  97 #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
  98 #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
  99 #define TEA5764_TUNCHK_TUNTO    0x0100
 100 #define TEA5764_TUNCHK_LD       0x0008
 101 #define TEA5764_TUNCHK_STEREO   0x0004
 102
 103 #define TEA5764_TESTREG_TRIGFR  0x0800
 104
 105 struct tea5764_regs {
 106         u16 intreg;                             /* INTFLAG & INTMSK */
 107         u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
 108         u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
 109         u16 frqchk;                             /* FRQCHKMSB & FRQCHKLSB */
 110         u16 tunchk;                             /* IFCHK & LEVCHK */
 111         u16 testreg;                            /* TESTBITS & TESTMODE */
 112         u16 rdsstat;                            /* RDSSTAT1 & RDSSTAT2 */
 113         u16 rdslb;                              /* RDSLBMSB & RDSLBLSB */
 114         u16 rdspb;                              /* RDSPBMSB & RDSPBLSB */
 115         u16 rdsbc;                              /* RDSBBC & RDSGBC */
 116         u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
 117         u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
 118         u16 manid;                              /* MANID1 & MANID2 */
 119         u16 chipid;                             /* CHIPID1 & CHIPID2 */
 120 } __attribute__ ((packed));
 121
 122 struct tea5764_write_regs {
 123         u8 intreg;                              /* INTMSK */
 124         u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
 125         u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
 126         u16 testreg;                            /* TESTBITS & TESTMODE */
 127         u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
 128         u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
 129 } __attribute__ ((packed));
 130
 131 #ifdef CONFIG_RADIO_TEA5764_XTAL
 132 #define RADIO_TEA5764_XTAL 1
 133 #else
 134 #define RADIO_TEA5764_XTAL 0
 135 #endif
 136
 137 static int radio_nr = -1;
 138 static int use_xtal = RADIO_TEA5764_XTAL;
 139
 140 struct tea5764_device {
 141         struct i2c_client               *i2c_client;
 142         struct video_device             *videodev;
 143         struct tea5764_regs             regs;
 144         struct mutex                    mutex;
 145 };
 146
 147 /* I2C code related */
 148 static int tea5764_i2c_read(struct tea5764_device *radio)
 149 {
 150         int i;
 151         u16 *p = (u16 *) &radio->regs;
 152
 153         struct i2c_msg msgs[1] = {
 154                 {       .addr = radio->i2c_client->addr,
 155                         .flags = I2C_M_RD,
 156                         .len = sizeof(radio->regs),
 157                         .buf = (void *)&radio->regs
 158                 },
 159         };
 160         if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
 161                 return -EIO;
 162         for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
 163                 p[i] = __be16_to_cpu(p[i]);
 164
 165         return 0;
 166 }
 167
 168 static int tea5764_i2c_write(struct tea5764_device *radio)
 169 {
 170         struct tea5764_write_regs wr;
 171         struct tea5764_regs *r = &radio->regs;
 172         struct i2c_msg msgs[1] = {
 173                 {
 174                         .addr = radio->i2c_client->addr,
 175                         .len = sizeof(wr),
 176                         .buf = (void *)&wr
 177                 },
 178         };
 179         wr.intreg  = r->intreg & 0xff;
 180         wr.frqset  = __cpu_to_be16(r->frqset);
 181         wr.tnctrl  = __cpu_to_be16(r->tnctrl);
 182         wr.testreg = __cpu_to_be16(r->testreg);
 183         wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
 184         wr.rdsbbl  = __cpu_to_be16(r->rdsbbl);
 185         if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
 186                 return -EIO;
 187         return 0;
 188 }
 189
 190 /* V4L2 code related */
 191 static struct v4l2_queryctrl radio_qctrl[] = {
 192         {
 193                 .id            = V4L2_CID_AUDIO_MUTE,
 194                 .name          = "Mute",
 195                 .minimum       = 0,
 196                 .maximum       = 1,
 197                 .default_value = 1,
 198                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 199         }
 200 };
 201
 202 static void tea5764_power_up(struct tea5764_device *radio)
 203 {
 204         struct tea5764_regs *r = &radio->regs;
 205
 206         if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
 207                 r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
 208                                TEA5764_TNCTRL_HLSI);
 209                 if (!use_xtal)
 210                         r->testreg |= TEA5764_TESTREG_TRIGFR;
 211                 else
 212                         r->testreg &= ~TEA5764_TESTREG_TRIGFR;
 213
 214                 r->tnctrl |= TEA5764_TNCTRL_PUPD0;
 215                 tea5764_i2c_write(radio);
 216         }
 217 }
 218
 219 static void tea5764_power_down(struct tea5764_device *radio)
 220 {
 221         struct tea5764_regs *r = &radio->regs;
 222
 223         if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
 224                 r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
 225                 tea5764_i2c_write(radio);
 226         }
 227 }
 228
 229 static void tea5764_set_freq(struct tea5764_device *radio, int freq)
 230 {
 231         struct tea5764_regs *r = &radio->regs;
 232
 233         /* formula: (freq [+ or -] 225000) / 8192 */
 234         if (r->tnctrl & TEA5764_TNCTRL_HLSI)
 235                 r->frqset = (freq + 225000) / 8192;
 236         else
 237                 r->frqset = (freq - 225000) / 8192;
 238 }
 239
 240 static int tea5764_get_freq(struct tea5764_device *radio)
 241 {
 242         struct tea5764_regs *r = &radio->regs;
 243
 244         if (r->tnctrl & TEA5764_TNCTRL_HLSI)
 245                 return (r->frqchk * 8192) - 225000;
 246         else
 247                 return (r->frqchk * 8192) + 225000;
 248 }
 249
 250 /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
 251 static void tea5764_tune(struct tea5764_device *radio, int freq)
 252 {
 253         tea5764_set_freq(radio, freq);
 254         if (tea5764_i2c_write(radio))
 255                 PWARN("Could not set frequency!");
 256 }
 257
 258 static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
 259 {
 260         struct tea5764_regs *r = &radio->regs;
 261         int tnctrl = r->tnctrl;
 262
 263         if (audmode == V4L2_TUNER_MODE_MONO)
 264                 r->tnctrl |= TEA5764_TNCTRL_MST;
 265         else
 266                 r->tnctrl &= ~TEA5764_TNCTRL_MST;
 267         if (tnctrl != r->tnctrl)
 268                 tea5764_i2c_write(radio);
 269 }
 270
 271 static int tea5764_get_audout_mode(struct tea5764_device *radio)
 272 {
 273         struct tea5764_regs *r = &radio->regs;
 274
 275         if (r->tnctrl & TEA5764_TNCTRL_MST)
 276                 return V4L2_TUNER_MODE_MONO;
 277         else
 278                 return V4L2_TUNER_MODE_STEREO;
 279 }
 280
 281 static void tea5764_mute(struct tea5764_device *radio, int on)
 282 {
 283         struct tea5764_regs *r = &radio->regs;
 284         int tnctrl = r->tnctrl;
 285
 286         if (on)
 287                 r->tnctrl |= TEA5764_TNCTRL_MU;
 288         else
 289                 r->tnctrl &= ~TEA5764_TNCTRL_MU;
 290         if (tnctrl != r->tnctrl)
 291                 tea5764_i2c_write(radio);
 292 }
 293
 294 static int tea5764_is_muted(struct tea5764_device *radio)
 295 {
 296         return radio->regs.tnctrl & TEA5764_TNCTRL_MU;
 297 }
 298
 299 /* V4L2 vidioc */
 300 static int vidioc_querycap(struct file *file, void  *priv,
 301                                         struct v4l2_capability *v)
 302 {
 303         struct tea5764_device *radio = video_drvdata(file);
 304         struct video_device *dev = radio->videodev;
 305
 306         strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
 307         strlcpy(v->card, dev->name, sizeof(v->card));
 308         snprintf(v->bus_info, sizeof(v->bus_info),
 309                  "I2C:%s", dev_name(&dev->dev));
 310         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 311         return 0;
 312 }
 313
 314 static int vidioc_g_tuner(struct file *file, void *priv,
 315                                 struct v4l2_tuner *v)
 316 {
 317         struct tea5764_device *radio = video_drvdata(file);
 318         struct tea5764_regs *r = &radio->regs;
 319
 320         if (v->index > 0)
 321                 return -EINVAL;
 322
 323         memset(v, 0, sizeof(*v));
 324         strcpy(v->name, "FM");
 325         v->type = V4L2_TUNER_RADIO;
 326         tea5764_i2c_read(radio);
 327         v->rangelow   = FREQ_MIN * FREQ_MUL;
 328         v->rangehigh  = FREQ_MAX * FREQ_MUL;
 329         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 330         if (r->tunchk & TEA5764_TUNCHK_STEREO)
 331                 v->rxsubchans = V4L2_TUNER_SUB_STEREO;
 332         else
 333                 v->rxsubchans = V4L2_TUNER_SUB_MONO;
 334         v->audmode = tea5764_get_audout_mode(radio);
 335         v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
 336         v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
 337
 338         return 0;
 339 }
 340
 341 static int vidioc_s_tuner(struct file *file, void *priv,
 342                                 struct v4l2_tuner *v)
 343 {
 344         struct tea5764_device *radio = video_drvdata(file);
 345
 346         if (v->index > 0)
 347                 return -EINVAL;
 348
 349         tea5764_set_audout_mode(radio, v->audmode);
 350         return 0;
 351 }
 352
 353 static int vidioc_s_frequency(struct file *file, void *priv,
 354                                 struct v4l2_frequency *f)
 355 {
 356         struct tea5764_device *radio = video_drvdata(file);
 357
 358         if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 359                 return -EINVAL;
 360         if (f->frequency == 0) {
 361                 /* We special case this as a power down control. */
 362                 tea5764_power_down(radio);
 363         }
 364         if (f->frequency < (FREQ_MIN * FREQ_MUL))
 365                 return -EINVAL;
 366         if (f->frequency > (FREQ_MAX * FREQ_MUL))
 367                 return -EINVAL;
 368         tea5764_power_up(radio);
 369         tea5764_tune(radio, (f->frequency * 125) / 2);
 370         return 0;
 371 }
 372
 373 static int vidioc_g_frequency(struct file *file, void *priv,
 374                                 struct v4l2_frequency *f)
 375 {
 376         struct tea5764_device *radio = video_drvdata(file);
 377         struct tea5764_regs *r = &radio->regs;
 378
 379         if (f->tuner != 0)
 380                 return -EINVAL;
 381         tea5764_i2c_read(radio);
 382         memset(f, 0, sizeof(*f));
 383         f->type = V4L2_TUNER_RADIO;
 384         if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
 385                 f->frequency = (tea5764_get_freq(radio) * 2) / 125;
 386         else
 387                 f->frequency = 0;
 388
 389         return 0;
 390 }
 391
 392 static int vidioc_queryctrl(struct file *file, void *priv,
 393                             struct v4l2_queryctrl *qc)
 394 {
 395         int i;
 396
 397         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 398                 if (qc->id && qc->id == radio_qctrl[i].id) {
 399                         memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
 400                         return 0;
 401                 }
 402         }
 403         return -EINVAL;
 404 }
 405
 406 static int vidioc_g_ctrl(struct file *file, void *priv,
 407                             struct v4l2_control *ctrl)
 408 {
 409         struct tea5764_device *radio = video_drvdata(file);
 410
 411         switch (ctrl->id) {
 412         case V4L2_CID_AUDIO_MUTE:
 413                 tea5764_i2c_read(radio);
 414                 ctrl->value = tea5764_is_muted(radio) ? 1 : 0;
 415                 return 0;
 416         }
 417         return -EINVAL;
 418 }
 419
 420 static int vidioc_s_ctrl(struct file *file, void *priv,
 421                             struct v4l2_control *ctrl)
 422 {
 423         struct tea5764_device *radio = video_drvdata(file);
 424
 425         switch (ctrl->id) {
 426         case V4L2_CID_AUDIO_MUTE:
 427                 tea5764_mute(radio, ctrl->value);
 428                 return 0;
 429         }
 430         return -EINVAL;
 431 }
 432
 433 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 434 {
 435         *i = 0;
 436         return 0;
 437 }
 438
 439 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 440 {
 441         if (i != 0)
 442                 return -EINVAL;
 443         return 0;
 444 }
 445
 446 static int vidioc_g_audio(struct file *file, void *priv,
 447                            struct v4l2_audio *a)
 448 {
 449         if (a->index > 1)
 450                 return -EINVAL;
 451
 452         strcpy(a->name, "Radio");
 453         a->capability = V4L2_AUDCAP_STEREO;
 454         return 0;
 455 }
 456
 457 static int vidioc_s_audio(struct file *file, void *priv,
 458                            const struct v4l2_audio *a)
 459 {
 460         if (a->index != 0)
 461                 return -EINVAL;
 462
 463         return 0;
 464 }
 465
 466 /* File system interface */
 467 static const struct v4l2_file_operations tea5764_fops = {
 468         .owner          = THIS_MODULE,
 469         .unlocked_ioctl = video_ioctl2,
 470 };
 471
 472 static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
 473         .vidioc_querycap    = vidioc_querycap,
 474         .vidioc_g_tuner     = vidioc_g_tuner,
 475         .vidioc_s_tuner     = vidioc_s_tuner,
 476         .vidioc_g_audio     = vidioc_g_audio,
 477         .vidioc_s_audio     = vidioc_s_audio,
 478         .vidioc_g_input     = vidioc_g_input,
 479         .vidioc_s_input     = vidioc_s_input,
 480         .vidioc_g_frequency = vidioc_g_frequency,
 481         .vidioc_s_frequency = vidioc_s_frequency,
 482         .vidioc_queryctrl   = vidioc_queryctrl,
 483         .vidioc_g_ctrl      = vidioc_g_ctrl,
 484         .vidioc_s_ctrl      = vidioc_s_ctrl,
 485 };
 486
 487 /* V4L2 interface */
 488 static struct video_device tea5764_radio_template = {
 489         .name           = "TEA5764 FM-Radio",
 490         .fops           = &tea5764_fops,
 491         .ioctl_ops      = &tea5764_ioctl_ops,
 492         .release        = video_device_release,
 493 };
 494
 495 /* I2C probe: check if the device exists and register with v4l if it is */
 496 static int tea5764_i2c_probe(struct i2c_client *client,
 497                              const struct i2c_device_id *id)
 498 {
 499         struct tea5764_device *radio;
 500         struct tea5764_regs *r;
 501         int ret;
 502
 503         PDEBUG("probe");
 504         radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL);
 505         if (!radio)
 506                 return -ENOMEM;
 507
 508         mutex_init(&radio->mutex);
 509         radio->i2c_client = client;
 510         ret = tea5764_i2c_read(radio);
 511         if (ret)
 512                 goto errfr;
 513         r = &radio->regs;
 514         PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
 515         if (r->chipid != TEA5764_CHIPID ||
 516                 (r->manid & 0x0fff) != TEA5764_MANID) {
 517                 PWARN("This chip is not a TEA5764!");
 518                 ret = -EINVAL;
 519                 goto errfr;
 520         }
 521
 522         radio->videodev = video_device_alloc();
 523         if (!(radio->videodev)) {
 524                 ret = -ENOMEM;
 525                 goto errfr;
 526         }
 527         memcpy(radio->videodev, &tea5764_radio_template,
 528                 sizeof(tea5764_radio_template));
 529
 530         i2c_set_clientdata(client, radio);
 531         video_set_drvdata(radio->videodev, radio);
 532         radio->videodev->lock = &radio->mutex;
 533
 534         /* initialize and power off the chip */
 535         tea5764_i2c_read(radio);
 536         tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
 537         tea5764_mute(radio, 1);
 538         tea5764_power_down(radio);
 539
 540         ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
 541         if (ret < 0) {
 542                 PWARN("Could not register video device!");
 543                 goto errrel;
 544         }
 545
 546         PINFO("registered.");
 547         return 0;
 548 errrel:
 549         video_device_release(radio->videodev);
 550 errfr:
 551         kfree(radio);
 552         return ret;
 553 }
 554
 555 static int tea5764_i2c_remove(struct i2c_client *client)
 556 {
 557         struct tea5764_device *radio = i2c_get_clientdata(client);
 558
 559         PDEBUG("remove");
 560         if (radio) {
 561                 tea5764_power_down(radio);
 562                 video_unregister_device(radio->videodev);
 563                 kfree(radio);
 564         }
 565         return 0;
 566 }
 567
 568 /* I2C subsystem interface */
 569 static const struct i2c_device_id tea5764_id[] = {
 570         { "radio-tea5764", 0 },
 571         { }                                     /* Terminating entry */
 572 };
 573 MODULE_DEVICE_TABLE(i2c, tea5764_id);
 574
 575 static struct i2c_driver tea5764_i2c_driver = {
 576         .driver = {
 577                 .name = "radio-tea5764",
 578                 .owner = THIS_MODULE,
 579         },
 580         .probe = tea5764_i2c_probe,
 581         .remove = tea5764_i2c_remove,
 582         .id_table = tea5764_id,
 583 };
 584
 585 module_i2c_driver(tea5764_i2c_driver);
 586
 587 MODULE_AUTHOR(DRIVER_AUTHOR);
 588 MODULE_DESCRIPTION(DRIVER_DESC);
 589 MODULE_LICENSE("GPL");
 590 MODULE_VERSION(DRIVER_VERSION);
 591
 592 module_param(use_xtal, int, 0);
 593 MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
 594 module_param(radio_nr, int, 0);
 595 MODULE_PARM_DESC(radio_nr, "video4linux device number to use");