drivers/media/radio/radio-tea5777.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
   4  *
   5  *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
   8  *
   9  *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
  10  */
  11
  12 #include <linux/delay.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/sched.h>
  16 #include <linux/slab.h>
  17 #include <media/v4l2-device.h>
  18 #include <media/v4l2-dev.h>
  19 #include <media/v4l2-fh.h>
  20 #include <media/v4l2-ioctl.h>
  21 #include <media/v4l2-event.h>
  22 #include "radio-tea5777.h"
  23
  24 MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
  25 MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
  26 MODULE_LICENSE("GPL");
  27
  28 #define TEA5777_FM_IF                   150 /* kHz */
  29 #define TEA5777_FM_FREQ_STEP            50  /* kHz */
  30
  31 #define TEA5777_AM_IF                   21  /* kHz */
  32 #define TEA5777_AM_FREQ_STEP            1   /* kHz */
  33
  34 /* Write reg, common bits */
  35 #define TEA5777_W_MUTE_MASK             (1LL << 47)
  36 #define TEA5777_W_MUTE_SHIFT            47
  37 #define TEA5777_W_AM_FM_MASK            (1LL << 46)
  38 #define TEA5777_W_AM_FM_SHIFT           46
  39 #define TEA5777_W_STB_MASK              (1LL << 45)
  40 #define TEA5777_W_STB_SHIFT             45
  41
  42 #define TEA5777_W_IFCE_MASK             (1LL << 29)
  43 #define TEA5777_W_IFCE_SHIFT            29
  44 #define TEA5777_W_IFW_MASK              (1LL << 28)
  45 #define TEA5777_W_IFW_SHIFT             28
  46 #define TEA5777_W_HILO_MASK             (1LL << 27)
  47 #define TEA5777_W_HILO_SHIFT            27
  48 #define TEA5777_W_DBUS_MASK             (1LL << 26)
  49 #define TEA5777_W_DBUS_SHIFT            26
  50
  51 #define TEA5777_W_INTEXT_MASK           (1LL << 24)
  52 #define TEA5777_W_INTEXT_SHIFT          24
  53 #define TEA5777_W_P1_MASK               (1LL << 23)
  54 #define TEA5777_W_P1_SHIFT              23
  55 #define TEA5777_W_P0_MASK               (1LL << 22)
  56 #define TEA5777_W_P0_SHIFT              22
  57 #define TEA5777_W_PEN1_MASK             (1LL << 21)
  58 #define TEA5777_W_PEN1_SHIFT            21
  59 #define TEA5777_W_PEN0_MASK             (1LL << 20)
  60 #define TEA5777_W_PEN0_SHIFT            20
  61
  62 #define TEA5777_W_CHP0_MASK             (1LL << 18)
  63 #define TEA5777_W_CHP0_SHIFT            18
  64 #define TEA5777_W_DEEM_MASK             (1LL << 17)
  65 #define TEA5777_W_DEEM_SHIFT            17
  66
  67 #define TEA5777_W_SEARCH_MASK           (1LL << 7)
  68 #define TEA5777_W_SEARCH_SHIFT          7
  69 #define TEA5777_W_PROGBLIM_MASK         (1LL << 6)
  70 #define TEA5777_W_PROGBLIM_SHIFT        6
  71 #define TEA5777_W_UPDWN_MASK            (1LL << 5)
  72 #define TEA5777_W_UPDWN_SHIFT           5
  73 #define TEA5777_W_SLEV_MASK             (3LL << 3)
  74 #define TEA5777_W_SLEV_SHIFT            3
  75
  76 /* Write reg, FM specific bits */
  77 #define TEA5777_W_FM_PLL_MASK           (0x1fffLL << 32)
  78 #define TEA5777_W_FM_PLL_SHIFT          32
  79 #define TEA5777_W_FM_FREF_MASK          (0x03LL << 30)
  80 #define TEA5777_W_FM_FREF_SHIFT         30
  81 #define TEA5777_W_FM_FREF_VALUE         0LL /* 50k steps, 150k IF */
  82
  83 #define TEA5777_W_FM_FORCEMONO_MASK     (1LL << 15)
  84 #define TEA5777_W_FM_FORCEMONO_SHIFT    15
  85 #define TEA5777_W_FM_SDSOFF_MASK        (1LL << 14)
  86 #define TEA5777_W_FM_SDSOFF_SHIFT       14
  87 #define TEA5777_W_FM_DOFF_MASK          (1LL << 13)
  88 #define TEA5777_W_FM_DOFF_SHIFT         13
  89
  90 #define TEA5777_W_FM_STEP_MASK          (3LL << 1)
  91 #define TEA5777_W_FM_STEP_SHIFT         1
  92
  93 /* Write reg, AM specific bits */
  94 #define TEA5777_W_AM_PLL_MASK           (0x7ffLL << 34)
  95 #define TEA5777_W_AM_PLL_SHIFT          34
  96 #define TEA5777_W_AM_AGCRF_MASK         (1LL << 33)
  97 #define TEA5777_W_AM_AGCRF_SHIFT        33
  98 #define TEA5777_W_AM_AGCIF_MASK         (1LL << 32)
  99 #define TEA5777_W_AM_AGCIF_SHIFT        32
 100 #define TEA5777_W_AM_MWLW_MASK          (1LL << 31)
 101 #define TEA5777_W_AM_MWLW_SHIFT         31
 102 #define TEA5777_W_AM_LW                 0LL
 103 #define TEA5777_W_AM_MW                 1LL
 104 #define TEA5777_W_AM_LNA_MASK           (1LL << 30)
 105 #define TEA5777_W_AM_LNA_SHIFT          30
 106
 107 #define TEA5777_W_AM_PEAK_MASK          (1LL << 25)
 108 #define TEA5777_W_AM_PEAK_SHIFT         25
 109
 110 #define TEA5777_W_AM_RFB_MASK           (1LL << 16)
 111 #define TEA5777_W_AM_RFB_SHIFT          16
 112 #define TEA5777_W_AM_CALLIGN_MASK       (1LL << 15)
 113 #define TEA5777_W_AM_CALLIGN_SHIFT      15
 114 #define TEA5777_W_AM_CBANK_MASK         (0x7fLL << 8)
 115 #define TEA5777_W_AM_CBANK_SHIFT        8
 116
 117 #define TEA5777_W_AM_DELAY_MASK         (1LL << 2)
 118 #define TEA5777_W_AM_DELAY_SHIFT        2
 119 #define TEA5777_W_AM_STEP_MASK          (1LL << 1)
 120 #define TEA5777_W_AM_STEP_SHIFT         1
 121
 122 /* Read reg, common bits */
 123 #define TEA5777_R_LEVEL_MASK            (0x0f << 17)
 124 #define TEA5777_R_LEVEL_SHIFT           17
 125 #define TEA5777_R_SFOUND_MASK           (0x01 << 16)
 126 #define TEA5777_R_SFOUND_SHIFT          16
 127 #define TEA5777_R_BLIM_MASK             (0x01 << 15)
 128 #define TEA5777_R_BLIM_SHIFT            15
 129
 130 /* Read reg, FM specific bits */
 131 #define TEA5777_R_FM_STEREO_MASK        (0x01 << 21)
 132 #define TEA5777_R_FM_STEREO_SHIFT       21
 133 #define TEA5777_R_FM_PLL_MASK           0x1fff
 134 #define TEA5777_R_FM_PLL_SHIFT          0
 135
 136 enum { BAND_FM, BAND_AM };
 137
 138 static const struct v4l2_frequency_band bands[] = {
 139         {
 140                 .type = V4L2_TUNER_RADIO,
 141                 .index = 0,
 142                 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
 143                               V4L2_TUNER_CAP_FREQ_BANDS |
 144                               V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 145                               V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
 146                 .rangelow   =  76000 * 16,
 147                 .rangehigh  = 108000 * 16,
 148                 .modulation = V4L2_BAND_MODULATION_FM,
 149         },
 150         {
 151                 .type = V4L2_TUNER_RADIO,
 152                 .index = 1,
 153                 .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
 154                               V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 155                               V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
 156                 .rangelow   =  530 * 16,
 157                 .rangehigh  = 1710 * 16,
 158                 .modulation = V4L2_BAND_MODULATION_AM,
 159         },
 160 };
 161
 162 static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
 163 {
 164         switch (tea->band) {
 165         case BAND_FM:
 166                 return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
 167         case BAND_AM:
 168                 return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
 169         }
 170         return 0; /* Never reached */
 171 }
 172
 173 int radio_tea5777_set_freq(struct radio_tea5777 *tea)
 174 {
 175         u32 freq;
 176         int res;
 177
 178         freq = clamp(tea->freq, bands[tea->band].rangelow,
 179                                 bands[tea->band].rangehigh);
 180         freq = (freq + 8) / 16; /* to kHz */
 181
 182         switch (tea->band) {
 183         case BAND_FM:
 184                 tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
 185                 freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
 186                 tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
 187                 tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
 188                 tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
 189                 tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
 190                                   TEA5777_W_FM_FREF_SHIFT;
 191                 tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
 192                 if (tea->audmode == V4L2_TUNER_MODE_MONO)
 193                         tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
 194                 break;
 195         case BAND_AM:
 196                 tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
 197                 tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
 198                 freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
 199                 tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
 200                 tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
 201                 tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
 202                 tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
 203                 tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
 204                 tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
 205                 tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
 206                 tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
 207                 tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
 208                 tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
 209                 tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
 210                 break;
 211         }
 212
 213         res = tea->ops->write_reg(tea, tea->write_reg);
 214         if (res)
 215                 return res;
 216
 217         tea->needs_write = false;
 218         tea->read_reg = -1;
 219         tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
 220
 221         return 0;
 222 }
 223
 224 static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
 225 {
 226         int res;
 227
 228         if (tea->read_reg != -1)
 229                 return 0;
 230
 231         if (tea->write_before_read && tea->needs_write) {
 232                 res = radio_tea5777_set_freq(tea);
 233                 if (res)
 234                         return res;
 235         }
 236
 237         if (wait) {
 238                 if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
 239                         return -ERESTARTSYS;
 240         }
 241
 242         res = tea->ops->read_reg(tea, &tea->read_reg);
 243         if (res)
 244                 return res;
 245
 246         tea->needs_write = true;
 247         return 0;
 248 }
 249
 250 /*
 251  * Linux Video interface
 252  */
 253
 254 static int vidioc_querycap(struct file *file, void  *priv,
 255                                         struct v4l2_capability *v)
 256 {
 257         struct radio_tea5777 *tea = video_drvdata(file);
 258
 259         strscpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
 260         strscpy(v->card, tea->card, sizeof(v->card));
 261         strlcat(v->card, " TEA5777", sizeof(v->card));
 262         strscpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
 263         v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
 264         v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
 265         v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
 266         return 0;
 267 }
 268
 269 static int vidioc_enum_freq_bands(struct file *file, void *priv,
 270                                          struct v4l2_frequency_band *band)
 271 {
 272         struct radio_tea5777 *tea = video_drvdata(file);
 273
 274         if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
 275             (!tea->has_am && band->index == BAND_AM))
 276                 return -EINVAL;
 277
 278         *band = bands[band->index];
 279         return 0;
 280 }
 281
 282 static int vidioc_g_tuner(struct file *file, void *priv,
 283                                         struct v4l2_tuner *v)
 284 {
 285         struct radio_tea5777 *tea = video_drvdata(file);
 286         int res;
 287
 288         if (v->index > 0)
 289                 return -EINVAL;
 290
 291         res = radio_tea5777_update_read_reg(tea, 0);
 292         if (res)
 293                 return res;
 294
 295         memset(v, 0, sizeof(*v));
 296         if (tea->has_am)
 297                 strscpy(v->name, "AM/FM", sizeof(v->name));
 298         else
 299                 strscpy(v->name, "FM", sizeof(v->name));
 300         v->type = V4L2_TUNER_RADIO;
 301         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
 302                         V4L2_TUNER_CAP_FREQ_BANDS |
 303                         V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 304                         V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
 305         v->rangelow   = tea->has_am ? bands[BAND_AM].rangelow :
 306                                       bands[BAND_FM].rangelow;
 307         v->rangehigh  = bands[BAND_FM].rangehigh;
 308         if (tea->band == BAND_FM &&
 309                         (tea->read_reg & TEA5777_R_FM_STEREO_MASK))
 310                 v->rxsubchans = V4L2_TUNER_SUB_STEREO;
 311         else
 312                 v->rxsubchans = V4L2_TUNER_SUB_MONO;
 313         v->audmode = tea->audmode;
 314         /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
 315         v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
 316                     (TEA5777_R_LEVEL_SHIFT - 12);
 317
 318         /* Invalidate read_reg, so that next call we return up2date signal */
 319         tea->read_reg = -1;
 320
 321         return 0;
 322 }
 323
 324 static int vidioc_s_tuner(struct file *file, void *priv,
 325                                         const struct v4l2_tuner *v)
 326 {
 327         struct radio_tea5777 *tea = video_drvdata(file);
 328         u32 orig_audmode = tea->audmode;
 329
 330         if (v->index)
 331                 return -EINVAL;
 332
 333         tea->audmode = v->audmode;
 334         if (tea->audmode > V4L2_TUNER_MODE_STEREO)
 335                 tea->audmode = V4L2_TUNER_MODE_STEREO;
 336
 337         if (tea->audmode != orig_audmode && tea->band == BAND_FM)
 338                 return radio_tea5777_set_freq(tea);
 339
 340         return 0;
 341 }
 342
 343 static int vidioc_g_frequency(struct file *file, void *priv,
 344                                         struct v4l2_frequency *f)
 345 {
 346         struct radio_tea5777 *tea = video_drvdata(file);
 347
 348         if (f->tuner != 0)
 349                 return -EINVAL;
 350         f->type = V4L2_TUNER_RADIO;
 351         f->frequency = tea->freq;
 352         return 0;
 353 }
 354
 355 static int vidioc_s_frequency(struct file *file, void *priv,
 356                                         const struct v4l2_frequency *f)
 357 {
 358         struct radio_tea5777 *tea = video_drvdata(file);
 359
 360         if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 361                 return -EINVAL;
 362
 363         if (tea->has_am && f->frequency < (20000 * 16))
 364                 tea->band = BAND_AM;
 365         else
 366                 tea->band = BAND_FM;
 367
 368         tea->freq = f->frequency;
 369         return radio_tea5777_set_freq(tea);
 370 }
 371
 372 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
 373                                         const struct v4l2_hw_freq_seek *a)
 374 {
 375         struct radio_tea5777 *tea = video_drvdata(file);
 376         unsigned long timeout;
 377         u32 rangelow = a->rangelow;
 378         u32 rangehigh = a->rangehigh;
 379         int i, res, spacing;
 380         u32 orig_freq;
 381
 382         if (a->tuner || a->wrap_around)
 383                 return -EINVAL;
 384
 385         if (file->f_flags & O_NONBLOCK)
 386                 return -EWOULDBLOCK;
 387
 388         if (rangelow || rangehigh) {
 389                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
 390                         if (i == BAND_AM && !tea->has_am)
 391                                 continue;
 392                         if (bands[i].rangelow  >= rangelow &&
 393                             bands[i].rangehigh <= rangehigh)
 394                                 break;
 395                 }
 396                 if (i == ARRAY_SIZE(bands))
 397                         return -EINVAL; /* No matching band found */
 398
 399                 tea->band = i;
 400                 if (tea->freq < rangelow || tea->freq > rangehigh) {
 401                         tea->freq = clamp(tea->freq, rangelow,
 402                                                      rangehigh);
 403                         res = radio_tea5777_set_freq(tea);
 404                         if (res)
 405                                 return res;
 406                 }
 407         } else {
 408                 rangelow  = bands[tea->band].rangelow;
 409                 rangehigh = bands[tea->band].rangehigh;
 410         }
 411
 412         spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
 413         orig_freq = tea->freq;
 414
 415         tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
 416         if (tea->seek_rangelow != rangelow) {
 417                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 418                 tea->freq = rangelow;
 419                 res = radio_tea5777_set_freq(tea);
 420                 if (res)
 421                         goto leave;
 422                 tea->seek_rangelow = rangelow;
 423         }
 424         if (tea->seek_rangehigh != rangehigh) {
 425                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 426                 tea->freq = rangehigh;
 427                 res = radio_tea5777_set_freq(tea);
 428                 if (res)
 429                         goto leave;
 430                 tea->seek_rangehigh = rangehigh;
 431         }
 432         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 433
 434         tea->write_reg |= TEA5777_W_SEARCH_MASK;
 435         if (a->seek_upward) {
 436                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 437                 tea->freq = orig_freq + spacing;
 438         } else {
 439                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 440                 tea->freq = orig_freq - spacing;
 441         }
 442         res = radio_tea5777_set_freq(tea);
 443         if (res)
 444                 goto leave;
 445
 446         timeout = jiffies + msecs_to_jiffies(5000);
 447         for (;;) {
 448                 if (time_after(jiffies, timeout)) {
 449                         res = -ENODATA;
 450                         break;
 451                 }
 452
 453                 res = radio_tea5777_update_read_reg(tea, 100);
 454                 if (res)
 455                         break;
 456
 457                 /*
 458                  * Note we use tea->freq to track how far we've searched sofar
 459                  * this is necessary to ensure we continue seeking at the right
 460                  * point, in the write_before_read case.
 461                  */
 462                 tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
 463                 tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
 464
 465                 if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
 466                         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 467                         return 0;
 468                 }
 469
 470                 if (tea->read_reg & TEA5777_R_BLIM_MASK) {
 471                         res = -ENODATA;
 472                         break;
 473                 }
 474
 475                 /* Force read_reg update */
 476                 tea->read_reg = -1;
 477         }
 478 leave:
 479         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 480         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 481         tea->freq = orig_freq;
 482         radio_tea5777_set_freq(tea);
 483         return res;
 484 }
 485
 486 static int tea575x_s_ctrl(struct v4l2_ctrl *c)
 487 {
 488         struct radio_tea5777 *tea =
 489                 container_of(c->handler, struct radio_tea5777, ctrl_handler);
 490
 491         switch (c->id) {
 492         case V4L2_CID_AUDIO_MUTE:
 493                 if (c->val)
 494                         tea->write_reg |= TEA5777_W_MUTE_MASK;
 495                 else
 496                         tea->write_reg &= ~TEA5777_W_MUTE_MASK;
 497
 498                 return radio_tea5777_set_freq(tea);
 499         }
 500
 501         return -EINVAL;
 502 }
 503
 504 static const struct v4l2_file_operations tea575x_fops = {
 505         .unlocked_ioctl = video_ioctl2,
 506         .open           = v4l2_fh_open,
 507         .release        = v4l2_fh_release,
 508         .poll           = v4l2_ctrl_poll,
 509 };
 510
 511 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
 512         .vidioc_querycap    = vidioc_querycap,
 513         .vidioc_g_tuner     = vidioc_g_tuner,
 514         .vidioc_s_tuner     = vidioc_s_tuner,
 515         .vidioc_g_frequency = vidioc_g_frequency,
 516         .vidioc_s_frequency = vidioc_s_frequency,
 517         .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
 518         .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
 519         .vidioc_log_status  = v4l2_ctrl_log_status,
 520         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 521         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 522 };
 523
 524 static const struct video_device tea575x_radio = {
 525         .ioctl_ops      = &tea575x_ioctl_ops,
 526         .release        = video_device_release_empty,
 527 };
 528
 529 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
 530         .s_ctrl = tea575x_s_ctrl,
 531 };
 532
 533 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
 534 {
 535         int res;
 536
 537         tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
 538                          (1LL << TEA5777_W_IFW_SHIFT) |
 539                          (1LL << TEA5777_W_INTEXT_SHIFT) |
 540                          (1LL << TEA5777_W_CHP0_SHIFT) |
 541                          (1LL << TEA5777_W_SLEV_SHIFT);
 542         tea->freq = 90500 * 16; /* 90.5Mhz default */
 543         tea->audmode = V4L2_TUNER_MODE_STEREO;
 544         res = radio_tea5777_set_freq(tea);
 545         if (res) {
 546                 v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
 547                 return res;
 548         }
 549
 550         tea->vd = tea575x_radio;
 551         video_set_drvdata(&tea->vd, tea);
 552         mutex_init(&tea->mutex);
 553         strscpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
 554         tea->vd.lock = &tea->mutex;
 555         tea->vd.v4l2_dev = tea->v4l2_dev;
 556         tea->fops = tea575x_fops;
 557         tea->fops.owner = owner;
 558         tea->vd.fops = &tea->fops;
 559
 560         tea->vd.ctrl_handler = &tea->ctrl_handler;
 561         v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
 562         v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
 563                           V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
 564         res = tea->ctrl_handler.error;
 565         if (res) {
 566                 v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
 567                 v4l2_ctrl_handler_free(&tea->ctrl_handler);
 568                 return res;
 569         }
 570         v4l2_ctrl_handler_setup(&tea->ctrl_handler);
 571
 572         res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
 573         if (res) {
 574                 v4l2_err(tea->v4l2_dev, "can't register video device!\n");
 575                 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 576                 return res;
 577         }
 578
 579         return 0;
 580 }
 581 EXPORT_SYMBOL_GPL(radio_tea5777_init);
 582
 583 void radio_tea5777_exit(struct radio_tea5777 *tea)
 584 {
 585         video_unregister_device(&tea->vd);
 586         v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 587 }
 588 EXPORT_SYMBOL_GPL(radio_tea5777_exit);