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); 599