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 strscpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver)); 270 strscpy(v->card, tea->card, sizeof(v->card)); 271 strlcat(v->card, " TEA5777", sizeof(v->card)); 272 strscpy(v->bus_info, tea->bus_info, sizeof(v->bus_info)); 273 return 0; 274 } 275 276 static int vidioc_enum_freq_bands(struct file *file, void *priv, 277 struct v4l2_frequency_band *band) 278 { 279 struct radio_tea5777 *tea = video_drvdata(file); 280 281 if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) || 282 (!tea->has_am && band->index == BAND_AM)) 283 return -EINVAL; 284 285 *band = bands[band->index]; 286 return 0; 287 } 288 289 static int vidioc_g_tuner(struct file *file, void *priv, 290 struct v4l2_tuner *v) 291 { 292 struct radio_tea5777 *tea = video_drvdata(file); 293 int res; 294 295 if (v->index > 0) 296 return -EINVAL; 297 298 res = radio_tea5777_update_read_reg(tea, 0); 299 if (res) 300 return res; 301 302 memset(v, 0, sizeof(*v)); 303 if (tea->has_am) 304 strscpy(v->name, "AM/FM", sizeof(v->name)); 305 else 306 strscpy(v->name, "FM", sizeof(v->name)); 307 v->type = V4L2_TUNER_RADIO; 308 v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | 309 V4L2_TUNER_CAP_FREQ_BANDS | 310 V4L2_TUNER_CAP_HWSEEK_BOUNDED | 311 V4L2_TUNER_CAP_HWSEEK_PROG_LIM; 312 v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : 313 bands[BAND_FM].rangelow; 314 v->rangehigh = bands[BAND_FM].rangehigh; 315 if (tea->band == BAND_FM && 316 (tea->read_reg & TEA5777_R_FM_STEREO_MASK)) 317 v->rxsubchans = V4L2_TUNER_SUB_STEREO; 318 else 319 v->rxsubchans = V4L2_TUNER_SUB_MONO; 320 v->audmode = tea->audmode; 321 /* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */ 322 v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >> 323 (TEA5777_R_LEVEL_SHIFT - 12); 324 325 /* Invalidate read_reg, so that next call we return up2date signal */ 326 tea->read_reg = -1; 327 328 return 0; 329 } 330 331 static int vidioc_s_tuner(struct file *file, void *priv, 332 const struct v4l2_tuner *v) 333 { 334 struct radio_tea5777 *tea = video_drvdata(file); 335 u32 orig_audmode = tea->audmode; 336 337 if (v->index) 338 return -EINVAL; 339 340 tea->audmode = v->audmode; 341 if (tea->audmode > V4L2_TUNER_MODE_STEREO) 342 tea->audmode = V4L2_TUNER_MODE_STEREO; 343 344 if (tea->audmode != orig_audmode && tea->band == BAND_FM) 345 return radio_tea5777_set_freq(tea); 346 347 return 0; 348 } 349 350 static int vidioc_g_frequency(struct file *file, void *priv, 351 struct v4l2_frequency *f) 352 { 353 struct radio_tea5777 *tea = video_drvdata(file); 354 355 if (f->tuner != 0) 356 return -EINVAL; 357 f->type = V4L2_TUNER_RADIO; 358 f->frequency = tea->freq; 359 return 0; 360 } 361 362 static int vidioc_s_frequency(struct file *file, void *priv, 363 const struct v4l2_frequency *f) 364 { 365 struct radio_tea5777 *tea = video_drvdata(file); 366 367 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 368 return -EINVAL; 369 370 if (tea->has_am && f->frequency < (20000 * 16)) 371 tea->band = BAND_AM; 372 else 373 tea->band = BAND_FM; 374 375 tea->freq = f->frequency; 376 return radio_tea5777_set_freq(tea); 377 } 378 379 static int vidioc_s_hw_freq_seek(struct file *file, void *fh, 380 const struct v4l2_hw_freq_seek *a) 381 { 382 struct radio_tea5777 *tea = video_drvdata(file); 383 unsigned long timeout; 384 u32 rangelow = a->rangelow; 385 u32 rangehigh = a->rangehigh; 386 int i, res, spacing; 387 u32 orig_freq; 388 389 if (a->tuner || a->wrap_around) 390 return -EINVAL; 391 392 if (file->f_flags & O_NONBLOCK) 393 return -EWOULDBLOCK; 394 395 if (rangelow || rangehigh) { 396 for (i = 0; i < ARRAY_SIZE(bands); i++) { 397 if (i == BAND_AM && !tea->has_am) 398 continue; 399 if (bands[i].rangelow >= rangelow && 400 bands[i].rangehigh <= rangehigh) 401 break; 402 } 403 if (i == ARRAY_SIZE(bands)) 404 return -EINVAL; /* No matching band found */ 405 406 tea->band = i; 407 if (tea->freq < rangelow || tea->freq > rangehigh) { 408 tea->freq = clamp(tea->freq, rangelow, 409 rangehigh); 410 res = radio_tea5777_set_freq(tea); 411 if (res) 412 return res; 413 } 414 } else { 415 rangelow = bands[tea->band].rangelow; 416 rangehigh = bands[tea->band].rangehigh; 417 } 418 419 spacing = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */ 420 orig_freq = tea->freq; 421 422 tea->write_reg |= TEA5777_W_PROGBLIM_MASK; 423 if (tea->seek_rangelow != rangelow) { 424 tea->write_reg &= ~TEA5777_W_UPDWN_MASK; 425 tea->freq = rangelow; 426 res = radio_tea5777_set_freq(tea); 427 if (res) 428 goto leave; 429 tea->seek_rangelow = rangelow; 430 } 431 if (tea->seek_rangehigh != rangehigh) { 432 tea->write_reg |= TEA5777_W_UPDWN_MASK; 433 tea->freq = rangehigh; 434 res = radio_tea5777_set_freq(tea); 435 if (res) 436 goto leave; 437 tea->seek_rangehigh = rangehigh; 438 } 439 tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK; 440 441 tea->write_reg |= TEA5777_W_SEARCH_MASK; 442 if (a->seek_upward) { 443 tea->write_reg |= TEA5777_W_UPDWN_MASK; 444 tea->freq = orig_freq + spacing; 445 } else { 446 tea->write_reg &= ~TEA5777_W_UPDWN_MASK; 447 tea->freq = orig_freq - spacing; 448 } 449 res = radio_tea5777_set_freq(tea); 450 if (res) 451 goto leave; 452 453 timeout = jiffies + msecs_to_jiffies(5000); 454 for (;;) { 455 if (time_after(jiffies, timeout)) { 456 res = -ENODATA; 457 break; 458 } 459 460 res = radio_tea5777_update_read_reg(tea, 100); 461 if (res) 462 break; 463 464 /* 465 * Note we use tea->freq to track how far we've searched sofar 466 * this is necessary to ensure we continue seeking at the right 467 * point, in the write_before_read case. 468 */ 469 tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK); 470 tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq); 471 472 if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) { 473 tea->write_reg &= ~TEA5777_W_SEARCH_MASK; 474 return 0; 475 } 476 477 if (tea->read_reg & TEA5777_R_BLIM_MASK) { 478 res = -ENODATA; 479 break; 480 } 481 482 /* Force read_reg update */ 483 tea->read_reg = -1; 484 } 485 leave: 486 tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK; 487 tea->write_reg &= ~TEA5777_W_SEARCH_MASK; 488 tea->freq = orig_freq; 489 radio_tea5777_set_freq(tea); 490 return res; 491 } 492 493 static int tea575x_s_ctrl(struct v4l2_ctrl *c) 494 { 495 struct radio_tea5777 *tea = 496 container_of(c->handler, struct radio_tea5777, ctrl_handler); 497 498 switch (c->id) { 499 case V4L2_CID_AUDIO_MUTE: 500 if (c->val) 501 tea->write_reg |= TEA5777_W_MUTE_MASK; 502 else 503 tea->write_reg &= ~TEA5777_W_MUTE_MASK; 504 505 return radio_tea5777_set_freq(tea); 506 } 507 508 return -EINVAL; 509 } 510 511 static const struct v4l2_file_operations tea575x_fops = { 512 .unlocked_ioctl = video_ioctl2, 513 .open = v4l2_fh_open, 514 .release = v4l2_fh_release, 515 .poll = v4l2_ctrl_poll, 516 }; 517 518 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = { 519 .vidioc_querycap = vidioc_querycap, 520 .vidioc_g_tuner = vidioc_g_tuner, 521 .vidioc_s_tuner = vidioc_s_tuner, 522 .vidioc_g_frequency = vidioc_g_frequency, 523 .vidioc_s_frequency = vidioc_s_frequency, 524 .vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek, 525 .vidioc_enum_freq_bands = vidioc_enum_freq_bands, 526 .vidioc_log_status = v4l2_ctrl_log_status, 527 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 528 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 529 }; 530 531 static const struct video_device tea575x_radio = { 532 .ioctl_ops = &tea575x_ioctl_ops, 533 .release = video_device_release_empty, 534 }; 535 536 static const struct v4l2_ctrl_ops tea575x_ctrl_ops = { 537 .s_ctrl = tea575x_s_ctrl, 538 }; 539 540 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner) 541 { 542 int res; 543 544 tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) | 545 (1LL << TEA5777_W_IFW_SHIFT) | 546 (1LL << TEA5777_W_INTEXT_SHIFT) | 547 (1LL << TEA5777_W_CHP0_SHIFT) | 548 (1LL << TEA5777_W_SLEV_SHIFT); 549 tea->freq = 90500 * 16; /* 90.5Mhz default */ 550 tea->audmode = V4L2_TUNER_MODE_STEREO; 551 res = radio_tea5777_set_freq(tea); 552 if (res) { 553 v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res); 554 return res; 555 } 556 557 tea->vd = tea575x_radio; 558 video_set_drvdata(&tea->vd, tea); 559 mutex_init(&tea->mutex); 560 strscpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name)); 561 tea->vd.lock = &tea->mutex; 562 tea->vd.v4l2_dev = tea->v4l2_dev; 563 tea->vd.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO | 564 V4L2_CAP_HW_FREQ_SEEK; 565 tea->fops = tea575x_fops; 566 tea->fops.owner = owner; 567 tea->vd.fops = &tea->fops; 568 569 tea->vd.ctrl_handler = &tea->ctrl_handler; 570 v4l2_ctrl_handler_init(&tea->ctrl_handler, 1); 571 v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops, 572 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 573 res = tea->ctrl_handler.error; 574 if (res) { 575 v4l2_err(tea->v4l2_dev, "can't initialize controls\n"); 576 v4l2_ctrl_handler_free(&tea->ctrl_handler); 577 return res; 578 } 579 v4l2_ctrl_handler_setup(&tea->ctrl_handler); 580 581 res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1); 582 if (res) { 583 v4l2_err(tea->v4l2_dev, "can't register video device!\n"); 584 v4l2_ctrl_handler_free(tea->vd.ctrl_handler); 585 return res; 586 } 587 588 return 0; 589 } 590 EXPORT_SYMBOL_GPL(radio_tea5777_init); 591 592 void radio_tea5777_exit(struct radio_tea5777 *tea) 593 { 594 video_unregister_device(&tea->vd); 595 v4l2_ctrl_handler_free(tea->vd.ctrl_handler); 596 } 597 EXPORT_SYMBOL_GPL(radio_tea5777_exit); 598