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