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         return 0;
 264 }
 265
 266 static int vidioc_enum_freq_bands(struct file *file, void *priv,
 267                                          struct v4l2_frequency_band *band)
 268 {
 269         struct radio_tea5777 *tea = video_drvdata(file);
 270
 271         if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
 272             (!tea->has_am && band->index == BAND_AM))
 273                 return -EINVAL;
 274
 275         *band = bands[band->index];
 276         return 0;
 277 }
 278
 279 static int vidioc_g_tuner(struct file *file, void *priv,
 280                                         struct v4l2_tuner *v)
 281 {
 282         struct radio_tea5777 *tea = video_drvdata(file);
 283         int res;
 284
 285         if (v->index > 0)
 286                 return -EINVAL;
 287
 288         res = radio_tea5777_update_read_reg(tea, 0);
 289         if (res)
 290                 return res;
 291
 292         memset(v, 0, sizeof(*v));
 293         if (tea->has_am)
 294                 strscpy(v->name, "AM/FM", sizeof(v->name));
 295         else
 296                 strscpy(v->name, "FM", sizeof(v->name));
 297         v->type = V4L2_TUNER_RADIO;
 298         v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
 299                         V4L2_TUNER_CAP_FREQ_BANDS |
 300                         V4L2_TUNER_CAP_HWSEEK_BOUNDED |
 301                         V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
 302         v->rangelow   = tea->has_am ? bands[BAND_AM].rangelow :
 303                                       bands[BAND_FM].rangelow;
 304         v->rangehigh  = bands[BAND_FM].rangehigh;
 305         if (tea->band == BAND_FM &&
 306                         (tea->read_reg & TEA5777_R_FM_STEREO_MASK))
 307                 v->rxsubchans = V4L2_TUNER_SUB_STEREO;
 308         else
 309                 v->rxsubchans = V4L2_TUNER_SUB_MONO;
 310         v->audmode = tea->audmode;
 311         /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
 312         v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
 313                     (TEA5777_R_LEVEL_SHIFT - 12);
 314
 315         /* Invalidate read_reg, so that next call we return up2date signal */
 316         tea->read_reg = -1;
 317
 318         return 0;
 319 }
 320
 321 static int vidioc_s_tuner(struct file *file, void *priv,
 322                                         const struct v4l2_tuner *v)
 323 {
 324         struct radio_tea5777 *tea = video_drvdata(file);
 325         u32 orig_audmode = tea->audmode;
 326
 327         if (v->index)
 328                 return -EINVAL;
 329
 330         tea->audmode = v->audmode;
 331         if (tea->audmode > V4L2_TUNER_MODE_STEREO)
 332                 tea->audmode = V4L2_TUNER_MODE_STEREO;
 333
 334         if (tea->audmode != orig_audmode && tea->band == BAND_FM)
 335                 return radio_tea5777_set_freq(tea);
 336
 337         return 0;
 338 }
 339
 340 static int vidioc_g_frequency(struct file *file, void *priv,
 341                                         struct v4l2_frequency *f)
 342 {
 343         struct radio_tea5777 *tea = video_drvdata(file);
 344
 345         if (f->tuner != 0)
 346                 return -EINVAL;
 347         f->type = V4L2_TUNER_RADIO;
 348         f->frequency = tea->freq;
 349         return 0;
 350 }
 351
 352 static int vidioc_s_frequency(struct file *file, void *priv,
 353                                         const struct v4l2_frequency *f)
 354 {
 355         struct radio_tea5777 *tea = video_drvdata(file);
 356
 357         if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
 358                 return -EINVAL;
 359
 360         if (tea->has_am && f->frequency < (20000 * 16))
 361                 tea->band = BAND_AM;
 362         else
 363                 tea->band = BAND_FM;
 364
 365         tea->freq = f->frequency;
 366         return radio_tea5777_set_freq(tea);
 367 }
 368
 369 static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
 370                                         const struct v4l2_hw_freq_seek *a)
 371 {
 372         struct radio_tea5777 *tea = video_drvdata(file);
 373         unsigned long timeout;
 374         u32 rangelow = a->rangelow;
 375         u32 rangehigh = a->rangehigh;
 376         int i, res, spacing;
 377         u32 orig_freq;
 378
 379         if (a->tuner || a->wrap_around)
 380                 return -EINVAL;
 381
 382         if (file->f_flags & O_NONBLOCK)
 383                 return -EWOULDBLOCK;
 384
 385         if (rangelow || rangehigh) {
 386                 for (i = 0; i < ARRAY_SIZE(bands); i++) {
 387                         if (i == BAND_AM && !tea->has_am)
 388                                 continue;
 389                         if (bands[i].rangelow  >= rangelow &&
 390                             bands[i].rangehigh <= rangehigh)
 391                                 break;
 392                 }
 393                 if (i == ARRAY_SIZE(bands))
 394                         return -EINVAL; /* No matching band found */
 395
 396                 tea->band = i;
 397                 if (tea->freq < rangelow || tea->freq > rangehigh) {
 398                         tea->freq = clamp(tea->freq, rangelow,
 399                                                      rangehigh);
 400                         res = radio_tea5777_set_freq(tea);
 401                         if (res)
 402                                 return res;
 403                 }
 404         } else {
 405                 rangelow  = bands[tea->band].rangelow;
 406                 rangehigh = bands[tea->band].rangehigh;
 407         }
 408
 409         spacing   = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
 410         orig_freq = tea->freq;
 411
 412         tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
 413         if (tea->seek_rangelow != rangelow) {
 414                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 415                 tea->freq = rangelow;
 416                 res = radio_tea5777_set_freq(tea);
 417                 if (res)
 418                         goto leave;
 419                 tea->seek_rangelow = rangelow;
 420         }
 421         if (tea->seek_rangehigh != rangehigh) {
 422                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 423                 tea->freq = rangehigh;
 424                 res = radio_tea5777_set_freq(tea);
 425                 if (res)
 426                         goto leave;
 427                 tea->seek_rangehigh = rangehigh;
 428         }
 429         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 430
 431         tea->write_reg |= TEA5777_W_SEARCH_MASK;
 432         if (a->seek_upward) {
 433                 tea->write_reg |= TEA5777_W_UPDWN_MASK;
 434                 tea->freq = orig_freq + spacing;
 435         } else {
 436                 tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
 437                 tea->freq = orig_freq - spacing;
 438         }
 439         res = radio_tea5777_set_freq(tea);
 440         if (res)
 441                 goto leave;
 442
 443         timeout = jiffies + msecs_to_jiffies(5000);
 444         for (;;) {
 445                 if (time_after(jiffies, timeout)) {
 446                         res = -ENODATA;
 447                         break;
 448                 }
 449
 450                 res = radio_tea5777_update_read_reg(tea, 100);
 451                 if (res)
 452                         break;
 453
 454                 /*
 455                  * Note we use tea->freq to track how far we've searched sofar
 456                  * this is necessary to ensure we continue seeking at the right
 457                  * point, in the write_before_read case.
 458                  */
 459                 tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
 460                 tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
 461
 462                 if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
 463                         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 464                         return 0;
 465                 }
 466
 467                 if (tea->read_reg & TEA5777_R_BLIM_MASK) {
 468                         res = -ENODATA;
 469                         break;
 470                 }
 471
 472                 /* Force read_reg update */
 473                 tea->read_reg = -1;
 474         }
 475 leave:
 476         tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
 477         tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
 478         tea->freq = orig_freq;
 479         radio_tea5777_set_freq(tea);
 480         return res;
 481 }
 482
 483 static int tea575x_s_ctrl(struct v4l2_ctrl *c)
 484 {
 485         struct radio_tea5777 *tea =
 486                 container_of(c->handler, struct radio_tea5777, ctrl_handler);
 487
 488         switch (c->id) {
 489         case V4L2_CID_AUDIO_MUTE:
 490                 if (c->val)
 491                         tea->write_reg |= TEA5777_W_MUTE_MASK;
 492                 else
 493                         tea->write_reg &= ~TEA5777_W_MUTE_MASK;
 494
 495                 return radio_tea5777_set_freq(tea);
 496         }
 497
 498         return -EINVAL;
 499 }
 500
 501 static const struct v4l2_file_operations tea575x_fops = {
 502         .unlocked_ioctl = video_ioctl2,
 503         .open           = v4l2_fh_open,
 504         .release        = v4l2_fh_release,
 505         .poll           = v4l2_ctrl_poll,
 506 };
 507
 508 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
 509         .vidioc_querycap    = vidioc_querycap,
 510         .vidioc_g_tuner     = vidioc_g_tuner,
 511         .vidioc_s_tuner     = vidioc_s_tuner,
 512         .vidioc_g_frequency = vidioc_g_frequency,
 513         .vidioc_s_frequency = vidioc_s_frequency,
 514         .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
 515         .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
 516         .vidioc_log_status  = v4l2_ctrl_log_status,
 517         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
 518         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
 519 };
 520
 521 static const struct video_device tea575x_radio = {
 522         .ioctl_ops      = &tea575x_ioctl_ops,
 523         .release        = video_device_release_empty,
 524 };
 525
 526 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
 527         .s_ctrl = tea575x_s_ctrl,
 528 };
 529
 530 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
 531 {
 532         int res;
 533
 534         tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
 535                          (1LL << TEA5777_W_IFW_SHIFT) |
 536                          (1LL << TEA5777_W_INTEXT_SHIFT) |
 537                          (1LL << TEA5777_W_CHP0_SHIFT) |
 538                          (1LL << TEA5777_W_SLEV_SHIFT);
 539         tea->freq = 90500 * 16; /* 90.5Mhz default */
 540         tea->audmode = V4L2_TUNER_MODE_STEREO;
 541         res = radio_tea5777_set_freq(tea);
 542         if (res) {
 543                 v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
 544                 return res;
 545         }
 546
 547         tea->vd = tea575x_radio;
 548         video_set_drvdata(&tea->vd, tea);
 549         mutex_init(&tea->mutex);
 550         strscpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
 551         tea->vd.lock = &tea->mutex;
 552         tea->vd.v4l2_dev = tea->v4l2_dev;
 553         tea->vd.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
 554                               V4L2_CAP_HW_FREQ_SEEK;
 555         tea->fops = tea575x_fops;
 556         tea->fops.owner = owner;
 557         tea->vd.fops = &tea->fops;
 558
 559         tea->vd.ctrl_handler = &tea->ctrl_handler;
 560         v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
 561         v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
 562                           V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
 563         res = tea->ctrl_handler.error;
 564         if (res) {
 565                 v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
 566                 v4l2_ctrl_handler_free(&tea->ctrl_handler);
 567                 return res;
 568         }
 569         v4l2_ctrl_handler_setup(&tea->ctrl_handler);
 570
 571         res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
 572         if (res) {
 573                 v4l2_err(tea->v4l2_dev, "can't register video device!\n");
 574                 v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 575                 return res;
 576         }
 577
 578         return 0;
 579 }
 580 EXPORT_SYMBOL_GPL(radio_tea5777_init);
 581
 582 void radio_tea5777_exit(struct radio_tea5777 *tea)
 583 {
 584         video_unregister_device(&tea->vd);
 585         v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
 586 }
 587 EXPORT_SYMBOL_GPL(radio_tea5777_exit);