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/module.h>
  36 #include <linux/init.h>                 /* Initdata                     */
  37 #include <linux/videodev2.h>            /* kernel radio structs         */
  38 #include <linux/i2c.h>                  /* I2C                          */
  39 #include <media/v4l2-common.h>
  40 #include <media/v4l2-ioctl.h>
  41 #include <linux/version.h>              /* for KERNEL_VERSION MACRO     */
  42
  43 #define DRIVER_VERSION  "v0.01"
  44 #define RADIO_VERSION   KERNEL_VERSION(0, 0, 1)
  45
  46 #define DRIVER_AUTHOR   "Fabio Belavenuto <belavenuto@gmail.com>"
  47 #define DRIVER_DESC     "A driver for the TEA5764 radio chip for EZX Phones."
  48
  49 #define PINFO(format, ...)\
  50         printk(KERN_INFO KBUILD_MODNAME ": "\
  51                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  52 #define PWARN(format, ...)\
  53         printk(KERN_WARNING KBUILD_MODNAME ": "\
  54                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  55 # define PDEBUG(format, ...)\
  56         printk(KERN_DEBUG KBUILD_MODNAME ": "\
  57                 DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
  58
  59 /* Frequency limits in MHz -- these are European values.  For Japanese
  60 devices, that would be 76000 and 91000.  */
  61 #define FREQ_MIN  87500
  62 #define FREQ_MAX 108000
  63 #define FREQ_MUL 16
  64
  65 /* TEA5764 registers */
  66 #define TEA5764_MANID           0x002b
  67 #define TEA5764_CHIPID          0x5764
  68
  69 #define TEA5764_INTREG_BLMSK    0x0001
  70 #define TEA5764_INTREG_FRRMSK   0x0002
  71 #define TEA5764_INTREG_LEVMSK   0x0008
  72 #define TEA5764_INTREG_IFMSK    0x0010
  73 #define TEA5764_INTREG_BLMFLAG  0x0100
  74 #define TEA5764_INTREG_FRRFLAG  0x0200
  75 #define TEA5764_INTREG_LEVFLAG  0x0800
  76 #define TEA5764_INTREG_IFFLAG   0x1000
  77
  78 #define TEA5764_FRQSET_SUD      0x8000
  79 #define TEA5764_FRQSET_SM       0x4000
  80
  81 #define TEA5764_TNCTRL_PUPD1    0x8000
  82 #define TEA5764_TNCTRL_PUPD0    0x4000
  83 #define TEA5764_TNCTRL_BLIM     0x2000
  84 #define TEA5764_TNCTRL_SWPM     0x1000
  85 #define TEA5764_TNCTRL_IFCTC    0x0800
  86 #define TEA5764_TNCTRL_AFM      0x0400
  87 #define TEA5764_TNCTRL_SMUTE    0x0200
  88 #define TEA5764_TNCTRL_SNC      0x0100
  89 #define TEA5764_TNCTRL_MU       0x0080
  90 #define TEA5764_TNCTRL_SSL1     0x0040
  91 #define TEA5764_TNCTRL_SSL0     0x0020
  92 #define TEA5764_TNCTRL_HLSI     0x0010
  93 #define TEA5764_TNCTRL_MST      0x0008
  94 #define TEA5764_TNCTRL_SWP      0x0004
  95 #define TEA5764_TNCTRL_DTC      0x0002
  96 #define TEA5764_TNCTRL_AHLSI    0x0001
  97
  98 #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
  99 #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
 100 #define TEA5764_TUNCHK_TUNTO    0x0100
 101 #define TEA5764_TUNCHK_LD       0x0008
 102 #define TEA5764_TUNCHK_STEREO   0x0004
 103
 104 #define TEA5764_TESTREG_TRIGFR  0x0800
 105
 106 struct tea5764_regs {
 107         u16 intreg;                             /* INTFLAG & INTMSK */
 108         u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
 109         u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
 110         u16 frqchk;                             /* FRQCHKMSB & FRQCHKLSB */
 111         u16 tunchk;                             /* IFCHK & LEVCHK */
 112         u16 testreg;                            /* TESTBITS & TESTMODE */
 113         u16 rdsstat;                            /* RDSSTAT1 & RDSSTAT2 */
 114         u16 rdslb;                              /* RDSLBMSB & RDSLBLSB */
 115         u16 rdspb;                              /* RDSPBMSB & RDSPBLSB */
 116         u16 rdsbc;                              /* RDSBBC & RDSGBC */
 117         u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
 118         u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
 119         u16 manid;                              /* MANID1 & MANID2 */
 120         u16 chipid;                             /* CHIPID1 & CHIPID2 */
 121 } __attribute__ ((packed));
 122
 123 struct tea5764_write_regs {
 124         u8 intreg;                              /* INTMSK */
 125         u16 frqset;                             /* FRQSETMSB & FRQSETLSB */
 126         u16 tnctrl;                             /* TNCTRL1 & TNCTRL2 */
 127         u16 testreg;                            /* TESTBITS & TESTMODE */
 128         u16 rdsctrl;                            /* RDSCTRL1 & RDSCTRL2 */
 129         u16 rdsbbl;                             /* PAUSEDET & RDSBBL */
 130 } __attribute__ ((packed));
 131
 132 #ifndef RADIO_TEA5764_XTAL
 133 #define RADIO_TEA5764_XTAL 1
 134 #endif
 135
 136 static int radio_nr = -1;
 137 static int use_xtal = RADIO_TEA5764_XTAL;
 138
 139 struct tea5764_device {
 140         struct i2c_client               *i2c_client;
 141         struct video_device             *videodev;
 142         struct tea5764_regs             regs;
 143         struct mutex                    mutex;
 144         int                             users;
 145 };
 146
 147 /* I2C code related */
 148 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                 { radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs),
 155                         (void *)&radio->regs },
 156         };
 157         if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
 158                 return -EIO;
 159         for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
 160                 p[i] = __be16_to_cpu(p[i]);
 161
 162         return 0;
 163 }
 164
 165 int tea5764_i2c_write(struct tea5764_device *radio)
 166 {
 167         struct tea5764_write_regs wr;
 168         struct tea5764_regs *r = &radio->regs;
 169         struct i2c_msg msgs[1] = {
 170                 { radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr },
 171         };
 172         wr.intreg  = r->intreg & 0xff;
 173         wr.frqset  = __cpu_to_be16(r->frqset);
 174         wr.tnctrl  = __cpu_to_be16(r->tnctrl);
 175         wr.testreg = __cpu_to_be16(r->testreg);
 176         wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
 177         wr.rdsbbl  = __cpu_to_be16(r->rdsbbl);
 178         if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
 179                 return -EIO;
 180         return 0;
 181 }
 182
 183 /* V4L2 code related */
 184 static struct v4l2_queryctrl radio_qctrl[] = {
 185         {
 186                 .id            = V4L2_CID_AUDIO_MUTE,
 187                 .name          = "Mute",
 188                 .minimum       = 0,
 189                 .maximum       = 1,
 190                 .default_value = 1,
 191                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
 192         }
 193 };
 194
 195 static void tea5764_power_up(struct tea5764_device *radio)
 196 {
 197         struct tea5764_regs *r = &radio->regs;
 198
 199         if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
 200                 r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
 201                                TEA5764_TNCTRL_HLSI);
 202                 if (!use_xtal)
 203                         r->testreg |= TEA5764_TESTREG_TRIGFR;
 204                 else
 205                         r->testreg &= ~TEA5764_TESTREG_TRIGFR;
 206
 207                 r->tnctrl |= TEA5764_TNCTRL_PUPD0;
 208                 tea5764_i2c_write(radio);
 209         }
 210 }
 211
 212 static void tea5764_power_down(struct tea5764_device *radio)
 213 {
 214         struct tea5764_regs *r = &radio->regs;
 215
 216         if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
 217                 r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
 218                 tea5764_i2c_write(radio);
 219         }
 220 }
 221
 222 static void tea5764_set_freq(struct tea5764_device *radio, int freq)
 223 {
 224         struct tea5764_regs *r = &radio->regs;
 225
 226         /* formula: (freq [+ or -] 225000) / 8192 */
 227         if (r->tnctrl & TEA5764_TNCTRL_HLSI)
 228                 r->frqset = (freq + 225000) / 8192;
 229         else
 230                 r->frqset = (freq - 225000) / 8192;
 231 }
 232
 233 static int tea5764_get_freq(struct tea5764_device *radio)
 234 {
 235         struct tea5764_regs *r = &radio->regs;
 236
 237         if (r->tnctrl & TEA5764_TNCTRL_HLSI)
 238                 return (r->frqchk * 8192) - 225000;
 239         else
 240                 return (r->frqchk * 8192) + 225000;
 241 }
 242
 243 /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
 244 static void tea5764_tune(struct tea5764_device *radio, int freq)
 245 {
 246         tea5764_set_freq(radio, freq);
 247         if (tea5764_i2c_write(radio))
 248                 PWARN("Could not set frequency!");
 249 }
 250
 251 static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
 252 {
 253         struct tea5764_regs *r = &radio->regs;
 254         int tnctrl = r->tnctrl;
 255
 256         if (audmode == V4L2_TUNER_MODE_MONO)
 257                 r->tnctrl |= TEA5764_TNCTRL_MST;
 258         else
 259                 r->tnctrl &= ~TEA5764_TNCTRL_MST;
 260         if (tnctrl != r->tnctrl)
 261                 tea5764_i2c_write(radio);
 262 }
 263
 264 static int tea5764_get_audout_mode(struct tea5764_device *radio)
 265 {
 266         struct tea5764_regs *r = &radio->regs;
 267
 268         if (r->tnctrl & TEA5764_TNCTRL_MST)
 269                 return V4L2_TUNER_MODE_MONO;
 270         else
 271                 return V4L2_TUNER_MODE_STEREO;
 272 }
 273
 274 static void tea5764_mute(struct tea5764_device *radio, int on)
 275 {
 276         struct tea5764_regs *r = &radio->regs;
 277         int tnctrl = r->tnctrl;
 278
 279         if (on)
 280                 r->tnctrl |= TEA5764_TNCTRL_MU;
 281         else
 282                 r->tnctrl &= ~TEA5764_TNCTRL_MU;
 283         if (tnctrl != r->tnctrl)
 284                 tea5764_i2c_write(radio);
 285 }
 286
 287 static int tea5764_is_muted(struct tea5764_device *radio)
 288 {
 289         return radio->regs.tnctrl & TEA5764_TNCTRL_MU;
 290 }
 291
 292 /* V4L2 vidioc */
 293 static int vidioc_querycap(struct file *file, void  *priv,
 294                                         struct v4l2_capability *v)
 295 {
 296         struct tea5764_device *radio = video_drvdata(file);
 297         struct video_device *dev = radio->videodev;
 298
 299         strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
 300         strlcpy(v->card, dev->name, sizeof(v->card));
 301         snprintf(v->bus_info, sizeof(v->bus_info), "I2C:%s", dev->dev.bus_id);
 302         v->version = RADIO_VERSION;
 303         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 304         return 0;
 305 }
 306
 307 static int vidioc_g_tuner(struct file *file, void *priv,
 308                                 struct v4l2_tuner *v)
 309 {
 310         struct tea5764_device *radio = video_drvdata(file);
 311         struct tea5764_regs *r = &radio->regs;
 312
 313         if (v->index > 0)
 314                 return -EINVAL;
 315
 316         memset(v, 0, sizeof(v));
 317         strcpy(v->name, "FM");
 318         v->type = V4L2_TUNER_RADIO;
 319         tea5764_i2c_read(radio);
 320         v->rangelow   = FREQ_MIN * FREQ_MUL;
 321         v->rangehigh  = FREQ_MAX * FREQ_MUL;
 322         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
 323         if (r->tunchk & TEA5764_TUNCHK_STEREO)
 324                         v->rxsubchans = V4L2_TUNER_SUB_STEREO;
 325         v->audmode = tea5764_get_audout_mode(radio);
 326         v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
 327         v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
 328
 329         return 0;
 330 }
 331
 332 static int vidioc_s_tuner(struct file *file, void *priv,
 333                                 struct v4l2_tuner *v)
 334 {
 335         struct tea5764_device *radio = video_drvdata(file);
 336
 337         if (v->index > 0)
 338                 return -EINVAL;
 339
 340         tea5764_set_audout_mode(radio, v->audmode);
 341         return 0;
 342 }
 343
 344 static int vidioc_s_frequency(struct file *file, void *priv,
 345                                 struct v4l2_frequency *f)
 346 {
 347         struct tea5764_device *radio = video_drvdata(file);
 348
 349         if (f->tuner != 0)
 350                 return -EINVAL;
 351         if (f->frequency == 0) {
 352                 /* We special case this as a power down control. */
 353                 tea5764_power_down(radio);
 354         }
 355         if (f->frequency < (FREQ_MIN * FREQ_MUL))
 356                 return -EINVAL;
 357         if (f->frequency > (FREQ_MAX * FREQ_MUL))
 358                 return -EINVAL;
 359         tea5764_power_up(radio);
 360         tea5764_tune(radio, (f->frequency * 125) / 2);
 361         return 0;
 362 }
 363
 364 static int vidioc_g_frequency(struct file *file, void *priv,
 365                                 struct v4l2_frequency *f)
 366 {
 367         struct tea5764_device *radio = video_drvdata(file);
 368         struct tea5764_regs *r = &radio->regs;
 369
 370         tea5764_i2c_read(radio);
 371         memset(f, 0, sizeof(f));
 372         f->type = V4L2_TUNER_RADIO;
 373         if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
 374                 f->frequency = (tea5764_get_freq(radio) * 2) / 125;
 375         else
 376                 f->frequency = 0;
 377
 378         return 0;
 379 }
 380
 381 static int vidioc_queryctrl(struct file *file, void *priv,
 382                             struct v4l2_queryctrl *qc)
 383 {
 384         int i;
 385
 386         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 387                 if (qc->id && qc->id == radio_qctrl[i].id) {
 388                         memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
 389                         return 0;
 390                 }
 391         }
 392         return -EINVAL;
 393 }
 394
 395 static int vidioc_g_ctrl(struct file *file, void *priv,
 396                             struct v4l2_control *ctrl)
 397 {
 398         struct tea5764_device *radio = video_drvdata(file);
 399
 400         switch (ctrl->id) {
 401         case V4L2_CID_AUDIO_MUTE:
 402                 tea5764_i2c_read(radio);
 403                 ctrl->value = tea5764_is_muted(radio) ? 1 : 0;
 404                 return 0;
 405         }
 406         return -EINVAL;
 407 }
 408
 409 static int vidioc_s_ctrl(struct file *file, void *priv,
 410                             struct v4l2_control *ctrl)
 411 {
 412         struct tea5764_device *radio = video_drvdata(file);
 413
 414         switch (ctrl->id) {
 415         case V4L2_CID_AUDIO_MUTE:
 416                 tea5764_mute(radio, ctrl->value);
 417                 return 0;
 418         }
 419         return -EINVAL;
 420 }
 421
 422 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 423 {
 424         *i = 0;
 425         return 0;
 426 }
 427
 428 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 429 {
 430         if (i != 0)
 431                 return -EINVAL;
 432         return 0;
 433 }
 434
 435 static int vidioc_g_audio(struct file *file, void *priv,
 436                            struct v4l2_audio *a)
 437 {
 438         if (a->index > 1)
 439                 return -EINVAL;
 440
 441         strcpy(a->name, "Radio");
 442         a->capability = V4L2_AUDCAP_STEREO;
 443         return 0;
 444 }
 445
 446 static int vidioc_s_audio(struct file *file, void *priv,
 447                            struct v4l2_audio *a)
 448 {
 449         if (a->index != 0)
 450                 return -EINVAL;
 451
 452         return 0;
 453 }
 454
 455 static int tea5764_open(struct file *file)
 456 {
 457         /* Currently we support only one device */
 458         int minor = video_devdata(file)->minor;
 459         struct tea5764_device *radio = video_drvdata(file);
 460
 461         if (radio->videodev->minor != minor)
 462                 return -ENODEV;
 463
 464         mutex_lock(&radio->mutex);
 465         /* Only exclusive access */
 466         if (radio->users) {
 467                 mutex_unlock(&radio->mutex);
 468                 return -EBUSY;
 469         }
 470         radio->users++;
 471         mutex_unlock(&radio->mutex);
 472         file->private_data = radio;
 473         return 0;
 474 }
 475
 476 static int tea5764_close(struct file *file)
 477 {
 478         struct tea5764_device *radio = video_drvdata(file);
 479
 480         if (!radio)
 481                 return -ENODEV;
 482         mutex_lock(&radio->mutex);
 483         radio->users--;
 484         mutex_unlock(&radio->mutex);
 485         return 0;
 486 }
 487
 488 /* File system interface */
 489 static const struct v4l2_file_operations tea5764_fops = {
 490         .owner          = THIS_MODULE,
 491         .open           = tea5764_open,
 492         .release        = tea5764_close,
 493         .ioctl          = video_ioctl2,
 494 };
 495
 496 static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
 497         .vidioc_querycap    = vidioc_querycap,
 498         .vidioc_g_tuner     = vidioc_g_tuner,
 499         .vidioc_s_tuner     = vidioc_s_tuner,
 500         .vidioc_g_audio     = vidioc_g_audio,
 501         .vidioc_s_audio     = vidioc_s_audio,
 502         .vidioc_g_input     = vidioc_g_input,
 503         .vidioc_s_input     = vidioc_s_input,
 504         .vidioc_g_frequency = vidioc_g_frequency,
 505         .vidioc_s_frequency = vidioc_s_frequency,
 506         .vidioc_queryctrl   = vidioc_queryctrl,
 507         .vidioc_g_ctrl      = vidioc_g_ctrl,
 508         .vidioc_s_ctrl      = vidioc_s_ctrl,
 509 };
 510
 511 /* V4L2 interface */
 512 static struct video_device tea5764_radio_template = {
 513         .name           = "TEA5764 FM-Radio",
 514         .fops           = &tea5764_fops,
 515         .ioctl_ops      = &tea5764_ioctl_ops,
 516         .release        = video_device_release,
 517 };
 518
 519 /* I2C probe: check if the device exists and register with v4l if it is */
 520 static int __devinit tea5764_i2c_probe(struct i2c_client *client,
 521                                         const struct i2c_device_id *id)
 522 {
 523         struct tea5764_device *radio;
 524         struct tea5764_regs *r;
 525         int ret;
 526
 527         PDEBUG("probe");
 528         radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL);
 529         if (!radio)
 530                 return -ENOMEM;
 531
 532         mutex_init(&radio->mutex);
 533         radio->i2c_client = client;
 534         ret = tea5764_i2c_read(radio);
 535         if (ret)
 536                 goto errfr;
 537         r = &radio->regs;
 538         PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
 539         if (r->chipid != TEA5764_CHIPID ||
 540                 (r->manid & 0x0fff) != TEA5764_MANID) {
 541                 PWARN("This chip is not a TEA5764!");
 542                 ret = -EINVAL;
 543                 goto errfr;
 544         }
 545
 546         radio->videodev = video_device_alloc();
 547         if (!(radio->videodev)) {
 548                 ret = -ENOMEM;
 549                 goto errfr;
 550         }
 551         memcpy(radio->videodev, &tea5764_radio_template,
 552                 sizeof(tea5764_radio_template));
 553
 554         i2c_set_clientdata(client, radio);
 555         video_set_drvdata(radio->videodev, radio);
 556
 557         ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
 558         if (ret < 0) {
 559                 PWARN("Could not register video device!");
 560                 goto errrel;
 561         }
 562
 563         /* initialize and power off the chip */
 564         tea5764_i2c_read(radio);
 565         tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
 566         tea5764_mute(radio, 1);
 567         tea5764_power_down(radio);
 568
 569         PINFO("registered.");
 570         return 0;
 571 errrel:
 572         video_device_release(radio->videodev);
 573 errfr:
 574         kfree(radio);
 575         return ret;
 576 }
 577
 578 static int __devexit tea5764_i2c_remove(struct i2c_client *client)
 579 {
 580         struct tea5764_device *radio = i2c_get_clientdata(client);
 581
 582         PDEBUG("remove");
 583         if (radio) {
 584                 tea5764_power_down(radio);
 585                 video_unregister_device(radio->videodev);
 586                 kfree(radio);
 587         }
 588         return 0;
 589 }
 590
 591 /* I2C subsystem interface */
 592 static const struct i2c_device_id tea5764_id[] = {
 593         { "radio-tea5764", 0 },
 594         { }                                     /* Terminating entry */
 595 };
 596 MODULE_DEVICE_TABLE(i2c, tea5764_id);
 597
 598 static struct i2c_driver tea5764_i2c_driver = {
 599         .driver = {
 600                 .name = "radio-tea5764",
 601                 .owner = THIS_MODULE,
 602         },
 603         .probe = tea5764_i2c_probe,
 604         .remove = __devexit_p(tea5764_i2c_remove),
 605         .id_table = tea5764_id,
 606 };
 607
 608 /* init the driver */
 609 static int __init tea5764_init(void)
 610 {
 611         int ret = i2c_add_driver(&tea5764_i2c_driver);
 612
 613         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": "
 614                 DRIVER_DESC "\n");
 615         return ret;
 616 }
 617
 618 /* cleanup the driver */
 619 static void __exit tea5764_exit(void)
 620 {
 621         i2c_del_driver(&tea5764_i2c_driver);
 622 }
 623
 624 MODULE_AUTHOR(DRIVER_AUTHOR);
 625 MODULE_DESCRIPTION(DRIVER_DESC);
 626 MODULE_LICENSE("GPL");
 627
 628 module_param(use_xtal, int, 1);
 629 MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
 630 module_param(radio_nr, int, 0);
 631 MODULE_PARM_DESC(radio_nr, "video4linux device number to use");
 632
 633 module_init(tea5764_init);
 634 module_exit(tea5764_exit);