kernel/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                                         const 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         tea->audmode = v->audmode;
 348         if (tea->audmode > V4L2_TUNER_MODE_STEREO)
 349                 tea->audmode = V4L2_TUNER_MODE_STEREO;
 350
 351         if (tea->audmode != orig_audmode && tea->band == BAND_FM)
 352                 return radio_tea5777_set_freq(tea);
 353
 354         return 0;
 355 }
 356
 357 static int vidioc_g_frequency(struct file *file, void *priv,
 358                                         struct v4l2_frequency *f)
 359 {
 360         struct radio_tea5777 *tea = video_drvdata(file);
 361
 362         if (f->tuner != 0)
 363                 return -EINVAL;
 364         f->type = V4L2_TUNER_RADIO;
 365         f->frequency = tea->freq;
 366         return 0;
 367 }
 368
 369 static int vidioc_s_frequency(struct file *file, void *priv,
 370                                         const struct v4l2_frequency *f)
 371 {
 372         struct radio_tea5777 *tea = video_drvdata(file);
 373
 374         if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 375                 return -EINVAL;
 376
 377         if (tea->has_am && f->frequency < (20000 * 16))
 378                 tea->band = BAND_AM;
 379         else
 380                 tea->band = BAND_FM;
 381
 382         tea->freq = f->frequency;
 383         return radio_tea5777_set_freq(tea);
 384 }
 385
 386 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
 387                                         const struct v4l2_hw_freq_seek *a)
 388 {
 389         struct radio_tea5777 *tea = video_drvdata(file);
 390         unsigned long timeout;
 391         u32 rangelow = a->rangelow;
 392         u32 rangehigh = a->rangehigh;
 393         int i, res, spacing;
 394         u32 orig_freq;
 395
 396         if (a->tuner || a->wrap_around)
 397                 return -EINVAL;
 398
 399         if (file->f_flags & O_NONBLOCK)
 400                 return -EWOULDBLOCK;
 401
 402         if (rangelow || rangehigh) {
 403                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
 404                         if (i == BAND_AM && !tea->has_am)
 405                                 continue;
 406                         if (bands[i].rangelow  >= rangelow &&
 407                             bands[i].rangehigh <= rangehigh)
 408                                 break;
 409                 }
 410                 if (i == ARRAY_SIZE(bands))
 411                         return -EINVAL; /* No matching band found */
 412
 413                 tea->band = i;
 414                 if (tea->freq < rangelow || tea->freq > rangehigh) {
 415                         tea->freq = clamp(tea->freq, rangelow,
 416                                                      rangehigh);
 417                         res = radio_tea5777_set_freq(tea);
 418                         if (res)
 419                                 return res;
 420                 }
 421         } else {
 422                 rangelow  = bands[tea->band].rangelow;
 423                 rangehigh = bands[tea->band].rangehigh;
 424         }
 425
 426         spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
 427         orig_freq = tea->freq;
 428
 429         tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
 430         if (tea->seek_rangelow != rangelow) {
 431                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 432                 tea->freq = rangelow;
 433                 res = radio_tea5777_set_freq(tea);
 434                 if (res)
 435                         goto leave;
 436                 tea->seek_rangelow = rangelow;
 437         }
 438         if (tea->seek_rangehigh != rangehigh) {
 439                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 440                 tea->freq = rangehigh;
 441                 res = radio_tea5777_set_freq(tea);
 442                 if (res)
 443                         goto leave;
 444                 tea->seek_rangehigh = rangehigh;
 445         }
 446         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 447
 448         tea->write_reg |= TEA5777_W_SEARCH_MASK;
 449         if (a->seek_upward) {
 450                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 451                 tea->freq = orig_freq + spacing;
 452         } else {
 453                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 454                 tea->freq = orig_freq - spacing;
 455         }
 456         res = radio_tea5777_set_freq(tea);
 457         if (res)
 458                 goto leave;
 459
 460         timeout = jiffies + msecs_to_jiffies(5000);
 461         for (;;) {
 462                 if (time_after(jiffies, timeout)) {
 463                         res = -ENODATA;
 464                         break;
 465                 }
 466
 467                 res = radio_tea5777_update_read_reg(tea, 100);
 468                 if (res)
 469                         break;
 470
 471                 /*
 472                  * Note we use tea->freq to track how far we've searched sofar
 473                  * this is necessary to ensure we continue seeking at the right
 474                  * point, in the write_before_read case.
 475                  */
 476                 tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
 477                 tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
 478
 479                 if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
 480                         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 481                         return 0;
 482                 }
 483
 484                 if (tea->read_reg & TEA5777_R_BLIM_MASK) {
 485                         res = -ENODATA;
 486                         break;
 487                 }
 488
 489                 /* Force read_reg update */
 490                 tea->read_reg = -1;
 491         }
 492 leave:
 493         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 494         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 495         tea->freq = orig_freq;
 496         radio_tea5777_set_freq(tea);
 497         return res;
 498 }
 499
 500 static int tea575x_s_ctrl(struct v4l2_ctrl *c)
 501 {
 502         struct radio_tea5777 *tea =
 503                 container_of(c->handler, struct radio_tea5777, ctrl_handler);
 504
 505         switch (c->id) {
 506         case V4L2_CID_AUDIO_MUTE:
 507                 if (c->val)
 508                         tea->write_reg |= TEA5777_W_MUTE_MASK;
 509                 else
 510                         tea->write_reg &= ~TEA5777_W_MUTE_MASK;
 511
 512                 return radio_tea5777_set_freq(tea);
 513         }
 514
 515         return -EINVAL;
 516 }
 517
 518 static const struct v4l2_file_operations tea575x_fops = {
 519         .unlocked_ioctl = video_ioctl2,
 520         .open           = v4l2_fh_open,
 521         .release        = v4l2_fh_release,
 522         .poll           = v4l2_ctrl_poll,
 523 };
 524
 525 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
 526         .vidioc_querycap    = vidioc_querycap,
 527         .vidioc_g_tuner     = vidioc_g_tuner,
 528         .vidioc_s_tuner     = vidioc_s_tuner,
 529         .vidioc_g_frequency = vidioc_g_frequency,
 530         .vidioc_s_frequency = vidioc_s_frequency,
 531         .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
 532         .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
 533         .vidioc_log_status  = v4l2_ctrl_log_status,
 534         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 535         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 536 };
 537
 538 static const struct video_device tea575x_radio = {
 539         .ioctl_ops      = &tea575x_ioctl_ops,
 540         .release        = video_device_release_empty,
 541 };
 542
 543 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
 544         .s_ctrl = tea575x_s_ctrl,
 545 };
 546
 547 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
 548 {
 549         int res;
 550
 551         tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
 552                          (1LL << TEA5777_W_IFW_SHIFT) |
 553                          (1LL << TEA5777_W_INTEXT_SHIFT) |
 554                          (1LL << TEA5777_W_CHP0_SHIFT) |
 555                          (1LL << TEA5777_W_SLEV_SHIFT);
 556         tea->freq = 90500 * 16; /* 90.5Mhz default */
 557         tea->audmode = V4L2_TUNER_MODE_STEREO;
 558         res = radio_tea5777_set_freq(tea);
 559         if (res) {
 560                 v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
 561                 return res;
 562         }
 563
 564         tea->vd = tea575x_radio;
 565         video_set_drvdata(&tea->vd, tea);
 566         mutex_init(&tea->mutex);
 567         strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
 568         tea->vd.lock = &tea->mutex;
 569         tea->vd.v4l2_dev = tea->v4l2_dev;
 570         tea->fops = tea575x_fops;
 571         tea->fops.owner = owner;
 572         tea->vd.fops = &tea->fops;
 573
 574         tea->vd.ctrl_handler = &tea->ctrl_handler;
 575         v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
 576         v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
 577                           V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
 578         res = tea->ctrl_handler.error;
 579         if (res) {
 580                 v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
 581                 v4l2_ctrl_handler_free(&tea->ctrl_handler);
 582                 return res;
 583         }
 584         v4l2_ctrl_handler_setup(&tea->ctrl_handler);
 585
 586         res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
 587         if (res) {
 588                 v4l2_err(tea->v4l2_dev, "can't register video device!\n");
 589                 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 590                 return res;
 591         }
 592
 593         return 0;
 594 }
 595 EXPORT_SYMBOL_GPL(radio_tea5777_init);
 596
 597 void radio_tea5777_exit(struct radio_tea5777 *tea)
 598 {
 599         video_unregister_device(&tea->vd);
 600         v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 601 }
 602 EXPORT_SYMBOL_GPL(radio_tea5777_exit);