drivers/media/radio/radio-tea5777.c

   1 /*
   2  *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
   3  *
   4  *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
   7  *
   8  *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  *
  24  */
  25
  26 #include <linux/delay.h>
  27 #include <linux/init.h>
  28 #include <linux/module.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31 #include <media/v4l2-device.h>
  32 #include <media/v4l2-dev.h>
  33 #include <media/v4l2-fh.h>
  34 #include <media/v4l2-ioctl.h>
  35 #include <media/v4l2-event.h>
  36 #include "radio-tea5777.h"
  37
  38 MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
  39 MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
  40 MODULE_LICENSE("GPL");
  41
  42 #define TEA5777_FM_IF                   150 /* kHz */
  43 #define TEA5777_FM_FREQ_STEP            50  /* kHz */
  44
  45 #define TEA5777_AM_IF                   21  /* kHz */
  46 #define TEA5777_AM_FREQ_STEP            1   /* kHz */
  47
  48 /* Write reg, common bits */
  49 #define TEA5777_W_MUTE_MASK             (1LL << 47)
  50 #define TEA5777_W_MUTE_SHIFT            47
  51 #define TEA5777_W_AM_FM_MASK            (1LL << 46)
  52 #define TEA5777_W_AM_FM_SHIFT           46
  53 #define TEA5777_W_STB_MASK              (1LL << 45)
  54 #define TEA5777_W_STB_SHIFT             45
  55
  56 #define TEA5777_W_IFCE_MASK             (1LL << 29)
  57 #define TEA5777_W_IFCE_SHIFT            29
  58 #define TEA5777_W_IFW_MASK              (1LL << 28)
  59 #define TEA5777_W_IFW_SHIFT             28
  60 #define TEA5777_W_HILO_MASK             (1LL << 27)
  61 #define TEA5777_W_HILO_SHIFT            27
  62 #define TEA5777_W_DBUS_MASK             (1LL << 26)
  63 #define TEA5777_W_DBUS_SHIFT            26
  64
  65 #define TEA5777_W_INTEXT_MASK           (1LL << 24)
  66 #define TEA5777_W_INTEXT_SHIFT          24
  67 #define TEA5777_W_P1_MASK               (1LL << 23)
  68 #define TEA5777_W_P1_SHIFT              23
  69 #define TEA5777_W_P0_MASK               (1LL << 22)
  70 #define TEA5777_W_P0_SHIFT              22
  71 #define TEA5777_W_PEN1_MASK             (1LL << 21)
  72 #define TEA5777_W_PEN1_SHIFT            21
  73 #define TEA5777_W_PEN0_MASK             (1LL << 20)
  74 #define TEA5777_W_PEN0_SHIFT            20
  75
  76 #define TEA5777_W_CHP0_MASK             (1LL << 18)
  77 #define TEA5777_W_CHP0_SHIFT            18
  78 #define TEA5777_W_DEEM_MASK             (1LL << 17)
  79 #define TEA5777_W_DEEM_SHIFT            17
  80
  81 #define TEA5777_W_SEARCH_MASK           (1LL << 7)
  82 #define TEA5777_W_SEARCH_SHIFT          7
  83 #define TEA5777_W_PROGBLIM_MASK         (1LL << 6)
  84 #define TEA5777_W_PROGBLIM_SHIFT        6
  85 #define TEA5777_W_UPDWN_MASK            (1LL << 5)
  86 #define TEA5777_W_UPDWN_SHIFT           5
  87 #define TEA5777_W_SLEV_MASK             (3LL << 3)
  88 #define TEA5777_W_SLEV_SHIFT            3
  89
  90 /* Write reg, FM specific bits */
  91 #define TEA5777_W_FM_PLL_MASK           (0x1fffLL << 32)
  92 #define TEA5777_W_FM_PLL_SHIFT          32
  93 #define TEA5777_W_FM_FREF_MASK          (0x03LL << 30)
  94 #define TEA5777_W_FM_FREF_SHIFT         30
  95 #define TEA5777_W_FM_FREF_VALUE         0LL /* 50k steps, 150k IF */
  96
  97 #define TEA5777_W_FM_FORCEMONO_MASK     (1LL << 15)
  98 #define TEA5777_W_FM_FORCEMONO_SHIFT    15
  99 #define TEA5777_W_FM_SDSOFF_MASK        (1LL << 14)
 100 #define TEA5777_W_FM_SDSOFF_SHIFT       14
 101 #define TEA5777_W_FM_DOFF_MASK          (1LL << 13)
 102 #define TEA5777_W_FM_DOFF_SHIFT         13
 103
 104 #define TEA5777_W_FM_STEP_MASK          (3LL << 1)
 105 #define TEA5777_W_FM_STEP_SHIFT         1
 106
 107 /* Write reg, AM specific bits */
 108 #define TEA5777_W_AM_PLL_MASK           (0x7ffLL << 34)
 109 #define TEA5777_W_AM_PLL_SHIFT          34
 110 #define TEA5777_W_AM_AGCRF_MASK         (1LL << 33)
 111 #define TEA5777_W_AM_AGCRF_SHIFT        33
 112 #define TEA5777_W_AM_AGCIF_MASK         (1LL << 32)
 113 #define TEA5777_W_AM_AGCIF_SHIFT        32
 114 #define TEA5777_W_AM_MWLW_MASK          (1LL << 31)
 115 #define TEA5777_W_AM_MWLW_SHIFT         31
 116 #define TEA5777_W_AM_LW                 0LL
 117 #define TEA5777_W_AM_MW                 1LL
 118 #define TEA5777_W_AM_LNA_MASK           (1LL << 30)
 119 #define TEA5777_W_AM_LNA_SHIFT          30
 120
 121 #define TEA5777_W_AM_PEAK_MASK          (1LL << 25)
 122 #define TEA5777_W_AM_PEAK_SHIFT         25
 123
 124 #define TEA5777_W_AM_RFB_MASK           (1LL << 16)
 125 #define TEA5777_W_AM_RFB_SHIFT          16
 126 #define TEA5777_W_AM_CALLIGN_MASK       (1LL << 15)
 127 #define TEA5777_W_AM_CALLIGN_SHIFT      15
 128 #define TEA5777_W_AM_CBANK_MASK         (0x7fLL << 8)
 129 #define TEA5777_W_AM_CBANK_SHIFT        8
 130
 131 #define TEA5777_W_AM_DELAY_MASK         (1LL << 2)
 132 #define TEA5777_W_AM_DELAY_SHIFT        2
 133 #define TEA5777_W_AM_STEP_MASK          (1LL << 1)
 134 #define TEA5777_W_AM_STEP_SHIFT         1
 135
 136 /* Read reg, common bits */
 137 #define TEA5777_R_LEVEL_MASK            (0x0f << 17)
 138 #define TEA5777_R_LEVEL_SHIFT           17
 139 #define TEA5777_R_SFOUND_MASK           (0x01 << 16)
 140 #define TEA5777_R_SFOUND_SHIFT          16
 141 #define TEA5777_R_BLIM_MASK             (0x01 << 15)
 142 #define TEA5777_R_BLIM_SHIFT            15
 143
 144 /* Read reg, FM specific bits */
 145 #define TEA5777_R_FM_STEREO_MASK        (0x01 << 21)
 146 #define TEA5777_R_FM_STEREO_SHIFT       21
 147 #define TEA5777_R_FM_PLL_MASK           0x1fff
 148 #define TEA5777_R_FM_PLL_SHIFT          0
 149
 150 enum { BAND_FM, BAND_AM };
 151
 152 static const struct v4l2_frequency_band bands[] = {
 153         {
 154                 .type = V4L2_TUNER_RADIO,
 155                 .index = 0,
 156                 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
 157                               V4L2_TUNER_CAP_FREQ_BANDS |
 158                               V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 159                               V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
 160                 .rangelow   =  76000 * 16,
 161                 .rangehigh  = 108000 * 16,
 162                 .modulation = V4L2_BAND_MODULATION_FM,
 163         },
 164         {
 165                 .type = V4L2_TUNER_RADIO,
 166                 .index = 1,
 167                 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
 168                               V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 169                               V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
 170                 .rangelow   =  530 * 16,
 171                 .rangehigh  = 1710 * 16,
 172                 .modulation = V4L2_BAND_MODULATION_AM,
 173         },
 174 };
 175
 176 static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
 177 {
 178         switch (tea->band) {
 179         case BAND_FM:
 180                 return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
 181         case BAND_AM:
 182                 return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
 183         }
 184         return 0; /* Never reached */
 185 }
 186
 187 int radio_tea5777_set_freq(struct radio_tea5777 *tea)
 188 {
 189         u32 freq;
 190         int res;
 191
 192         freq = clamp(tea->freq, bands[tea->band].rangelow,
 193                                 bands[tea->band].rangehigh);
 194         freq = (freq + 8) / 16; /* to kHz */
 195
 196         switch (tea->band) {
 197         case BAND_FM:
 198                 tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
 199                 freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
 200                 tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
 201                 tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
 202                 tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
 203                 tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
 204                                   TEA5777_W_FM_FREF_SHIFT;
 205                 tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
 206                 if (tea->audmode == V4L2_TUNER_MODE_MONO)
 207                         tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
 208                 break;
 209         case BAND_AM:
 210                 tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
 211                 tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
 212                 freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
 213                 tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
 214                 tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
 215                 tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
 216                 tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
 217                 tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
 218                 tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
 219                 tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
 220                 tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
 221                 tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
 222                 tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
 223                 tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
 224                 break;
 225         }
 226
 227         res = tea->ops->write_reg(tea, tea->write_reg);
 228         if (res)
 229                 return res;
 230
 231         tea->needs_write = false;
 232         tea->read_reg = -1;
 233         tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
 234
 235         return 0;
 236 }
 237
 238 static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
 239 {
 240         int res;
 241
 242         if (tea->read_reg != -1)
 243                 return 0;
 244
 245         if (tea->write_before_read && tea->needs_write) {
 246                 res = radio_tea5777_set_freq(tea);
 247                 if (res)
 248                         return res;
 249         }
 250
 251         if (wait) {
 252                 if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
 253                         return -ERESTARTSYS;
 254         }
 255
 256         res = tea->ops->read_reg(tea, &tea->read_reg);
 257         if (res)
 258                 return res;
 259
 260         tea->needs_write = true;
 261         return 0;
 262 }
 263
 264 /*
 265  * Linux Video interface
 266  */
 267
 268 static int vidioc_querycap(struct file *file, void  *priv,
 269                                         struct v4l2_capability *v)
 270 {
 271         struct radio_tea5777 *tea = video_drvdata(file);
 272
 273         strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
 274         strlcpy(v->card, tea->card, sizeof(v->card));
 275         strlcat(v->card, " TEA5777", sizeof(v->card));
 276         strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
 277         v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 278         v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
 279         v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
 280         return 0;
 281 }
 282
 283 static int vidioc_enum_freq_bands(struct file *file, void *priv,
 284                                          struct v4l2_frequency_band *band)
 285 {
 286         struct radio_tea5777 *tea = video_drvdata(file);
 287
 288         if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
 289             (!tea->has_am && band->index == BAND_AM))
 290                 return -EINVAL;
 291
 292         *band = bands[band->index];
 293         return 0;
 294 }
 295
 296 static int vidioc_g_tuner(struct file *file, void *priv,
 297                                         struct v4l2_tuner *v)
 298 {
 299         struct radio_tea5777 *tea = video_drvdata(file);
 300         int res;
 301
 302         if (v->index > 0)
 303                 return -EINVAL;
 304
 305         res = radio_tea5777_update_read_reg(tea, 0);
 306         if (res)
 307                 return res;
 308
 309         memset(v, 0, sizeof(*v));
 310         if (tea->has_am)
 311                 strlcpy(v->name, "AM/FM", sizeof(v->name));
 312         else
 313                 strlcpy(v->name, "FM", sizeof(v->name));
 314         v->type = V4L2_TUNER_RADIO;
 315         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
 316                         V4L2_TUNER_CAP_FREQ_BANDS |
 317                         V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 318                         V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
 319         v->rangelow   = tea->has_am ? bands[BAND_AM].rangelow :
 320                                       bands[BAND_FM].rangelow;
 321         v->rangehigh  = bands[BAND_FM].rangehigh;
 322         if (tea->band == BAND_FM &&
 323                         (tea->read_reg & TEA5777_R_FM_STEREO_MASK))
 324                 v->rxsubchans = V4L2_TUNER_SUB_STEREO;
 325         else
 326                 v->rxsubchans = V4L2_TUNER_SUB_MONO;
 327         v->audmode = tea->audmode;
 328         /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
 329         v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
 330                     (TEA5777_R_LEVEL_SHIFT - 12);
 331
 332         /* Invalidate read_reg, so that next call we return up2date signal */
 333         tea->read_reg = -1;
 334
 335         return 0;
 336 }
 337
 338 static int vidioc_s_tuner(struct file *file, void *priv,
 339                                         struct v4l2_tuner *v)
 340 {
 341         struct radio_tea5777 *tea = video_drvdata(file);
 342         u32 orig_audmode = tea->audmode;
 343
 344         if (v->index)
 345                 return -EINVAL;
 346
 347         if (v->audmode > V4L2_TUNER_MODE_STEREO)
 348                 v->audmode = V4L2_TUNER_MODE_STEREO;
 349
 350         tea->audmode = v->audmode;
 351
 352         if (tea->audmode != orig_audmode && tea->band == BAND_FM)
 353                 return radio_tea5777_set_freq(tea);
 354
 355         return 0;
 356 }
 357
 358 static int vidioc_g_frequency(struct file *file, void *priv,
 359                                         struct v4l2_frequency *f)
 360 {
 361         struct radio_tea5777 *tea = video_drvdata(file);
 362
 363         if (f->tuner != 0)
 364                 return -EINVAL;
 365         f->type = V4L2_TUNER_RADIO;
 366         f->frequency = tea->freq;
 367         return 0;
 368 }
 369
 370 static int vidioc_s_frequency(struct file *file, void *priv,
 371                                         struct v4l2_frequency *f)
 372 {
 373         struct radio_tea5777 *tea = video_drvdata(file);
 374
 375         if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 376                 return -EINVAL;
 377
 378         if (tea->has_am && f->frequency < (20000 * 16))
 379                 tea->band = BAND_AM;
 380         else
 381                 tea->band = BAND_FM;
 382
 383         tea->freq = f->frequency;
 384         return radio_tea5777_set_freq(tea);
 385 }
 386
 387 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
 388                                         const struct v4l2_hw_freq_seek *a)
 389 {
 390         struct radio_tea5777 *tea = video_drvdata(file);
 391         unsigned long timeout;
 392         u32 rangelow = a->rangelow;
 393         u32 rangehigh = a->rangehigh;
 394         int i, res, spacing;
 395         u32 orig_freq;
 396
 397         if (a->tuner || a->wrap_around)
 398                 return -EINVAL;
 399
 400         if (file->f_flags & O_NONBLOCK)
 401                 return -EWOULDBLOCK;
 402
 403         if (rangelow || rangehigh) {
 404                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
 405                         if (i == BAND_AM && !tea->has_am)
 406                                 continue;
 407                         if (bands[i].rangelow  >= rangelow &&
 408                             bands[i].rangehigh <= rangehigh)
 409                                 break;
 410                 }
 411                 if (i == ARRAY_SIZE(bands))
 412                         return -EINVAL; /* No matching band found */
 413
 414                 tea->band = i;
 415                 if (tea->freq < rangelow || tea->freq > rangehigh) {
 416                         tea->freq = clamp(tea->freq, rangelow,
 417                                                      rangehigh);
 418                         res = radio_tea5777_set_freq(tea);
 419                         if (res)
 420                                 return res;
 421                 }
 422         } else {
 423                 rangelow  = bands[tea->band].rangelow;
 424                 rangehigh = bands[tea->band].rangehigh;
 425         }
 426
 427         spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
 428         orig_freq = tea->freq;
 429
 430         tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
 431         if (tea->seek_rangelow != rangelow) {
 432                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 433                 tea->freq = rangelow;
 434                 res = radio_tea5777_set_freq(tea);
 435                 if (res)
 436                         goto leave;
 437                 tea->seek_rangelow = rangelow;
 438         }
 439         if (tea->seek_rangehigh != rangehigh) {
 440                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 441                 tea->freq = rangehigh;
 442                 res = radio_tea5777_set_freq(tea);
 443                 if (res)
 444                         goto leave;
 445                 tea->seek_rangehigh = rangehigh;
 446         }
 447         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 448
 449         tea->write_reg |= TEA5777_W_SEARCH_MASK;
 450         if (a->seek_upward) {
 451                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 452                 tea->freq = orig_freq + spacing;
 453         } else {
 454                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 455                 tea->freq = orig_freq - spacing;
 456         }
 457         res = radio_tea5777_set_freq(tea);
 458         if (res)
 459                 goto leave;
 460
 461         timeout = jiffies + msecs_to_jiffies(5000);
 462         for (;;) {
 463                 if (time_after(jiffies, timeout)) {
 464                         res = -ENODATA;
 465                         break;
 466                 }
 467
 468                 res = radio_tea5777_update_read_reg(tea, 100);
 469                 if (res)
 470                         break;
 471
 472                 /*
 473                  * Note we use tea->freq to track how far we've searched sofar
 474                  * this is necessary to ensure we continue seeking at the right
 475                  * point, in the write_before_read case.
 476                  */
 477                 tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
 478                 tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
 479
 480                 if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
 481                         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 482                         return 0;
 483                 }
 484
 485                 if (tea->read_reg & TEA5777_R_BLIM_MASK) {
 486                         res = -ENODATA;
 487                         break;
 488                 }
 489
 490                 /* Force read_reg update */
 491                 tea->read_reg = -1;
 492         }
 493 leave:
 494         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 495         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 496         tea->freq = orig_freq;
 497         radio_tea5777_set_freq(tea);
 498         return res;
 499 }
 500
 501 static int tea575x_s_ctrl(struct v4l2_ctrl *c)
 502 {
 503         struct radio_tea5777 *tea =
 504                 container_of(c->handler, struct radio_tea5777, ctrl_handler);
 505
 506         switch (c->id) {
 507         case V4L2_CID_AUDIO_MUTE:
 508                 if (c->val)
 509                         tea->write_reg |= TEA5777_W_MUTE_MASK;
 510                 else
 511                         tea->write_reg &= ~TEA5777_W_MUTE_MASK;
 512
 513                 return radio_tea5777_set_freq(tea);
 514         }
 515
 516         return -EINVAL;
 517 }
 518
 519 static const struct v4l2_file_operations tea575x_fops = {
 520         .unlocked_ioctl = video_ioctl2,
 521         .open           = v4l2_fh_open,
 522         .release        = v4l2_fh_release,
 523         .poll           = v4l2_ctrl_poll,
 524 };
 525
 526 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
 527         .vidioc_querycap    = vidioc_querycap,
 528         .vidioc_g_tuner     = vidioc_g_tuner,
 529         .vidioc_s_tuner     = vidioc_s_tuner,
 530         .vidioc_g_frequency = vidioc_g_frequency,
 531         .vidioc_s_frequency = vidioc_s_frequency,
 532         .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
 533         .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
 534         .vidioc_log_status  = v4l2_ctrl_log_status,
 535         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 536         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 537 };
 538
 539 static const struct video_device tea575x_radio = {
 540         .ioctl_ops      = &tea575x_ioctl_ops,
 541         .release        = video_device_release_empty,
 542 };
 543
 544 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
 545         .s_ctrl = tea575x_s_ctrl,
 546 };
 547
 548 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
 549 {
 550         int res;
 551
 552         tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
 553                          (1LL << TEA5777_W_IFW_SHIFT) |
 554                          (1LL << TEA5777_W_INTEXT_SHIFT) |
 555                          (1LL << TEA5777_W_CHP0_SHIFT) |
 556                          (1LL << TEA5777_W_SLEV_SHIFT);
 557         tea->freq = 90500 * 16; /* 90.5Mhz default */
 558         tea->audmode = V4L2_TUNER_MODE_STEREO;
 559         res = radio_tea5777_set_freq(tea);
 560         if (res) {
 561                 v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
 562                 return res;
 563         }
 564
 565         tea->vd = tea575x_radio;
 566         video_set_drvdata(&tea->vd, tea);
 567         mutex_init(&tea->mutex);
 568         strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
 569         tea->vd.lock = &tea->mutex;
 570         tea->vd.v4l2_dev = tea->v4l2_dev;
 571         tea->fops = tea575x_fops;
 572         tea->fops.owner = owner;
 573         tea->vd.fops = &tea->fops;
 574         set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
 575
 576         tea->vd.ctrl_handler = &tea->ctrl_handler;
 577         v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
 578         v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
 579                           V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
 580         res = tea->ctrl_handler.error;
 581         if (res) {
 582                 v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
 583                 v4l2_ctrl_handler_free(&tea->ctrl_handler);
 584                 return res;
 585         }
 586         v4l2_ctrl_handler_setup(&tea->ctrl_handler);
 587
 588         res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
 589         if (res) {
 590                 v4l2_err(tea->v4l2_dev, "can't register video device!\n");
 591                 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 592                 return res;
 593         }
 594
 595         return 0;
 596 }
 597 EXPORT_SYMBOL_GPL(radio_tea5777_init);
 598
 599 void radio_tea5777_exit(struct radio_tea5777 *tea)
 600 {
 601         video_unregister_device(&tea->vd);
 602         v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 603 }
 604 EXPORT_SYMBOL_GPL(radio_tea5777_exit);