1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * FM Driver for Connectivity chip of Texas Instruments. |
4 | * This file provides interfaces to V4L2 subsystem. |
5 | * |
6 | * This module registers with V4L2 subsystem as Radio |
7 | * data system interface (/dev/radio). During the registration, |
8 | * it will expose two set of function pointers. |
9 | * |
10 | * 1) File operation related API (open, close, read, write, poll...etc). |
11 | * 2) Set of V4L2 IOCTL complaint API. |
12 | * |
13 | * Copyright (C) 2011 Texas Instruments |
14 | * Author: Raja Mani <raja_mani@ti.com> |
15 | * Author: Manjunatha Halli <manjunatha_halli@ti.com> |
16 | */ |
17 | |
18 | #include <linux/export.h> |
19 | |
20 | #include "fmdrv.h" |
21 | #include "fmdrv_v4l2.h" |
22 | #include "fmdrv_common.h" |
23 | #include "fmdrv_rx.h" |
24 | #include "fmdrv_tx.h" |
25 | |
26 | static struct video_device gradio_dev; |
27 | static u8 radio_disconnected; |
28 | |
29 | /* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */ |
30 | |
31 | /* Read RX RDS data */ |
32 | static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf, |
33 | size_t count, loff_t *ppos) |
34 | { |
35 | u8 rds_mode; |
36 | int ret; |
37 | struct fmdev *fmdev; |
38 | |
39 | fmdev = video_drvdata(file); |
40 | |
41 | if (!radio_disconnected) { |
42 | fmerr("FM device is already disconnected\n" ); |
43 | return -EIO; |
44 | } |
45 | |
46 | if (mutex_lock_interruptible(&fmdev->mutex)) |
47 | return -ERESTARTSYS; |
48 | |
49 | /* Turn on RDS mode if it is disabled */ |
50 | ret = fm_rx_get_rds_mode(fmdev, &rds_mode); |
51 | if (ret < 0) { |
52 | fmerr("Unable to read current rds mode\n" ); |
53 | goto read_unlock; |
54 | } |
55 | |
56 | if (rds_mode == FM_RDS_DISABLE) { |
57 | ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE); |
58 | if (ret < 0) { |
59 | fmerr("Failed to enable rds mode\n" ); |
60 | goto read_unlock; |
61 | } |
62 | } |
63 | |
64 | /* Copy RDS data from internal buffer to user buffer */ |
65 | ret = fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count); |
66 | read_unlock: |
67 | mutex_unlock(lock: &fmdev->mutex); |
68 | return ret; |
69 | } |
70 | |
71 | /* Write TX RDS data */ |
72 | static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf, |
73 | size_t count, loff_t *ppos) |
74 | { |
75 | struct tx_rds rds; |
76 | int ret; |
77 | struct fmdev *fmdev; |
78 | |
79 | ret = copy_from_user(to: &rds, from: buf, n: sizeof(rds)); |
80 | rds.text[sizeof(rds.text) - 1] = '\0'; |
81 | fmdbg("(%d)type: %d, text %s, af %d\n" , |
82 | ret, rds.text_type, rds.text, rds.af_freq); |
83 | if (ret) |
84 | return -EFAULT; |
85 | |
86 | fmdev = video_drvdata(file); |
87 | if (mutex_lock_interruptible(&fmdev->mutex)) |
88 | return -ERESTARTSYS; |
89 | fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); |
90 | fm_tx_set_af(fmdev, rds.af_freq); |
91 | mutex_unlock(lock: &fmdev->mutex); |
92 | |
93 | return sizeof(rds); |
94 | } |
95 | |
96 | static __poll_t fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts) |
97 | { |
98 | int ret; |
99 | struct fmdev *fmdev; |
100 | |
101 | fmdev = video_drvdata(file); |
102 | mutex_lock(&fmdev->mutex); |
103 | ret = fmc_is_rds_data_available(fmdev, file, pts); |
104 | mutex_unlock(lock: &fmdev->mutex); |
105 | if (ret < 0) |
106 | return EPOLLIN | EPOLLRDNORM; |
107 | |
108 | return 0; |
109 | } |
110 | |
111 | /* |
112 | * Handle open request for "/dev/radioX" device. |
113 | * Start with FM RX mode as default. |
114 | */ |
115 | static int fm_v4l2_fops_open(struct file *file) |
116 | { |
117 | int ret; |
118 | struct fmdev *fmdev = NULL; |
119 | |
120 | /* Don't allow multiple open */ |
121 | if (radio_disconnected) { |
122 | fmerr("FM device is already opened\n" ); |
123 | return -EBUSY; |
124 | } |
125 | |
126 | fmdev = video_drvdata(file); |
127 | |
128 | if (mutex_lock_interruptible(&fmdev->mutex)) |
129 | return -ERESTARTSYS; |
130 | ret = fmc_prepare(fmdev); |
131 | if (ret < 0) { |
132 | fmerr("Unable to prepare FM CORE\n" ); |
133 | goto open_unlock; |
134 | } |
135 | |
136 | fmdbg("Load FM RX firmware..\n" ); |
137 | |
138 | ret = fmc_set_mode(fmdev, FM_MODE_RX); |
139 | if (ret < 0) { |
140 | fmerr("Unable to load FM RX firmware\n" ); |
141 | goto open_unlock; |
142 | } |
143 | radio_disconnected = 1; |
144 | |
145 | open_unlock: |
146 | mutex_unlock(lock: &fmdev->mutex); |
147 | return ret; |
148 | } |
149 | |
150 | static int fm_v4l2_fops_release(struct file *file) |
151 | { |
152 | int ret; |
153 | struct fmdev *fmdev; |
154 | |
155 | fmdev = video_drvdata(file); |
156 | if (!radio_disconnected) { |
157 | fmdbg("FM device is already closed\n" ); |
158 | return 0; |
159 | } |
160 | |
161 | mutex_lock(&fmdev->mutex); |
162 | ret = fmc_set_mode(fmdev, FM_MODE_OFF); |
163 | if (ret < 0) { |
164 | fmerr("Unable to turn off the chip\n" ); |
165 | goto release_unlock; |
166 | } |
167 | |
168 | ret = fmc_release(fmdev); |
169 | if (ret < 0) { |
170 | fmerr("FM CORE release failed\n" ); |
171 | goto release_unlock; |
172 | } |
173 | radio_disconnected = 0; |
174 | |
175 | release_unlock: |
176 | mutex_unlock(lock: &fmdev->mutex); |
177 | return ret; |
178 | } |
179 | |
180 | /* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */ |
181 | static int fm_v4l2_vidioc_querycap(struct file *file, void *priv, |
182 | struct v4l2_capability *capability) |
183 | { |
184 | strscpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver)); |
185 | strscpy(capability->card, FM_DRV_CARD_SHORT_NAME, |
186 | sizeof(capability->card)); |
187 | sprintf(buf: capability->bus_info, fmt: "UART" ); |
188 | return 0; |
189 | } |
190 | |
191 | static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl) |
192 | { |
193 | struct fmdev *fmdev = container_of(ctrl->handler, |
194 | struct fmdev, ctrl_handler); |
195 | |
196 | switch (ctrl->id) { |
197 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: |
198 | ctrl->val = fm_tx_get_tune_cap_val(fmdev); |
199 | break; |
200 | default: |
201 | fmwarn("%s: Unknown IOCTL: %d\n" , __func__, ctrl->id); |
202 | break; |
203 | } |
204 | |
205 | return 0; |
206 | } |
207 | |
208 | static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl) |
209 | { |
210 | struct fmdev *fmdev = container_of(ctrl->handler, |
211 | struct fmdev, ctrl_handler); |
212 | |
213 | switch (ctrl->id) { |
214 | case V4L2_CID_AUDIO_VOLUME: /* set volume */ |
215 | return fm_rx_set_volume(fmdev, (u16)ctrl->val); |
216 | |
217 | case V4L2_CID_AUDIO_MUTE: /* set mute */ |
218 | return fmc_set_mute_mode(fmdev, (u8)ctrl->val); |
219 | |
220 | case V4L2_CID_TUNE_POWER_LEVEL: |
221 | /* set TX power level - ext control */ |
222 | return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val); |
223 | |
224 | case V4L2_CID_TUNE_PREEMPHASIS: |
225 | return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val); |
226 | |
227 | default: |
228 | return -EINVAL; |
229 | } |
230 | } |
231 | |
232 | static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv, |
233 | struct v4l2_audio *audio) |
234 | { |
235 | memset(audio, 0, sizeof(*audio)); |
236 | strscpy(audio->name, "Radio" , sizeof(audio->name)); |
237 | audio->capability = V4L2_AUDCAP_STEREO; |
238 | |
239 | return 0; |
240 | } |
241 | |
242 | static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv, |
243 | const struct v4l2_audio *audio) |
244 | { |
245 | if (audio->index != 0) |
246 | return -EINVAL; |
247 | |
248 | return 0; |
249 | } |
250 | |
251 | /* Get tuner attributes. If current mode is NOT RX, return error */ |
252 | static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv, |
253 | struct v4l2_tuner *tuner) |
254 | { |
255 | struct fmdev *fmdev = video_drvdata(file); |
256 | u32 bottom_freq; |
257 | u32 top_freq; |
258 | u16 stereo_mono_mode; |
259 | u16 ; |
260 | int ret; |
261 | |
262 | if (tuner->index != 0) |
263 | return -EINVAL; |
264 | |
265 | if (fmdev->curr_fmmode != FM_MODE_RX) |
266 | return -EPERM; |
267 | |
268 | ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq); |
269 | if (ret != 0) |
270 | return ret; |
271 | |
272 | ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode); |
273 | if (ret != 0) |
274 | return ret; |
275 | |
276 | ret = fm_rx_get_rssi_level(fmdev, &rssilvl); |
277 | if (ret != 0) |
278 | return ret; |
279 | |
280 | strscpy(tuner->name, "FM" , sizeof(tuner->name)); |
281 | tuner->type = V4L2_TUNER_RADIO; |
282 | /* Store rangelow and rangehigh freq in unit of 62.5 Hz */ |
283 | tuner->rangelow = bottom_freq * 16; |
284 | tuner->rangehigh = top_freq * 16; |
285 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | |
286 | ((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0); |
287 | tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | |
288 | V4L2_TUNER_CAP_LOW | |
289 | V4L2_TUNER_CAP_HWSEEK_BOUNDED | |
290 | V4L2_TUNER_CAP_HWSEEK_WRAP; |
291 | tuner->audmode = (stereo_mono_mode ? |
292 | V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO); |
293 | |
294 | /* |
295 | * Actual rssi value lies in between -128 to +127. |
296 | * Convert this range from 0 to 255 by adding +128 |
297 | */ |
298 | rssilvl += 128; |
299 | |
300 | /* |
301 | * Return signal strength value should be within 0 to 65535. |
302 | * Find out correct signal radio by multiplying (65535/255) = 257 |
303 | */ |
304 | tuner->signal = rssilvl * 257; |
305 | tuner->afc = 0; |
306 | |
307 | return ret; |
308 | } |
309 | |
310 | /* |
311 | * Set tuner attributes. If current mode is NOT RX, set to RX. |
312 | * Currently, we set only audio mode (mono/stereo) and RDS state (on/off). |
313 | * Should we set other tuner attributes, too? |
314 | */ |
315 | static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv, |
316 | const struct v4l2_tuner *tuner) |
317 | { |
318 | struct fmdev *fmdev = video_drvdata(file); |
319 | u16 aud_mode; |
320 | u8 rds_mode; |
321 | int ret; |
322 | |
323 | if (tuner->index != 0) |
324 | return -EINVAL; |
325 | |
326 | aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ? |
327 | FM_STEREO_MODE : FM_MONO_MODE; |
328 | rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ? |
329 | FM_RDS_ENABLE : FM_RDS_DISABLE; |
330 | |
331 | if (fmdev->curr_fmmode != FM_MODE_RX) { |
332 | ret = fmc_set_mode(fmdev, FM_MODE_RX); |
333 | if (ret < 0) { |
334 | fmerr("Failed to set RX mode\n" ); |
335 | return ret; |
336 | } |
337 | } |
338 | |
339 | ret = fmc_set_stereo_mono(fmdev, aud_mode); |
340 | if (ret < 0) { |
341 | fmerr("Failed to set RX stereo/mono mode\n" ); |
342 | return ret; |
343 | } |
344 | |
345 | ret = fmc_set_rds_mode(fmdev, rds_mode); |
346 | if (ret < 0) |
347 | fmerr("Failed to set RX RDS mode\n" ); |
348 | |
349 | return ret; |
350 | } |
351 | |
352 | /* Get tuner or modulator radio frequency */ |
353 | static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv, |
354 | struct v4l2_frequency *freq) |
355 | { |
356 | struct fmdev *fmdev = video_drvdata(file); |
357 | int ret; |
358 | |
359 | ret = fmc_get_freq(fmdev, &freq->frequency); |
360 | if (ret < 0) { |
361 | fmerr("Failed to get frequency\n" ); |
362 | return ret; |
363 | } |
364 | |
365 | /* Frequency unit of 62.5 Hz*/ |
366 | freq->frequency = (u32) freq->frequency * 16; |
367 | |
368 | return 0; |
369 | } |
370 | |
371 | /* Set tuner or modulator radio frequency */ |
372 | static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv, |
373 | const struct v4l2_frequency *freq) |
374 | { |
375 | struct fmdev *fmdev = video_drvdata(file); |
376 | |
377 | /* |
378 | * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency |
379 | * in units of 62.5 Hz. |
380 | */ |
381 | return fmc_set_freq(fmdev, freq->frequency / 16); |
382 | } |
383 | |
384 | /* Set hardware frequency seek. If current mode is NOT RX, set it RX. */ |
385 | static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv, |
386 | const struct v4l2_hw_freq_seek *seek) |
387 | { |
388 | struct fmdev *fmdev = video_drvdata(file); |
389 | int ret; |
390 | |
391 | if (file->f_flags & O_NONBLOCK) |
392 | return -EWOULDBLOCK; |
393 | |
394 | if (fmdev->curr_fmmode != FM_MODE_RX) { |
395 | ret = fmc_set_mode(fmdev, FM_MODE_RX); |
396 | if (ret != 0) { |
397 | fmerr("Failed to set RX mode\n" ); |
398 | return ret; |
399 | } |
400 | } |
401 | |
402 | ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around, |
403 | seek->spacing); |
404 | if (ret < 0) |
405 | fmerr("RX seek failed - %d\n" , ret); |
406 | |
407 | return ret; |
408 | } |
409 | /* Get modulator attributes. If mode is not TX, return no attributes. */ |
410 | static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv, |
411 | struct v4l2_modulator *mod) |
412 | { |
413 | struct fmdev *fmdev = video_drvdata(file); |
414 | |
415 | if (mod->index != 0) |
416 | return -EINVAL; |
417 | |
418 | if (fmdev->curr_fmmode != FM_MODE_TX) |
419 | return -EPERM; |
420 | |
421 | mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ? |
422 | V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) | |
423 | ((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ? |
424 | V4L2_TUNER_SUB_RDS : 0); |
425 | |
426 | mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | |
427 | V4L2_TUNER_CAP_LOW; |
428 | |
429 | return 0; |
430 | } |
431 | |
432 | /* Set modulator attributes. If mode is not TX, set to TX. */ |
433 | static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv, |
434 | const struct v4l2_modulator *mod) |
435 | { |
436 | struct fmdev *fmdev = video_drvdata(file); |
437 | u8 rds_mode; |
438 | u16 aud_mode; |
439 | int ret; |
440 | |
441 | if (mod->index != 0) |
442 | return -EINVAL; |
443 | |
444 | if (fmdev->curr_fmmode != FM_MODE_TX) { |
445 | ret = fmc_set_mode(fmdev, FM_MODE_TX); |
446 | if (ret != 0) { |
447 | fmerr("Failed to set TX mode\n" ); |
448 | return ret; |
449 | } |
450 | } |
451 | |
452 | aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ? |
453 | FM_STEREO_MODE : FM_MONO_MODE; |
454 | rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ? |
455 | FM_RDS_ENABLE : FM_RDS_DISABLE; |
456 | ret = fm_tx_set_stereo_mono(fmdev, aud_mode); |
457 | if (ret < 0) { |
458 | fmerr("Failed to set mono/stereo mode for TX\n" ); |
459 | return ret; |
460 | } |
461 | ret = fm_tx_set_rds_mode(fmdev, rds_mode); |
462 | if (ret < 0) |
463 | fmerr("Failed to set rds mode for TX\n" ); |
464 | |
465 | return ret; |
466 | } |
467 | |
468 | static const struct v4l2_file_operations fm_drv_fops = { |
469 | .owner = THIS_MODULE, |
470 | .read = fm_v4l2_fops_read, |
471 | .write = fm_v4l2_fops_write, |
472 | .poll = fm_v4l2_fops_poll, |
473 | .unlocked_ioctl = video_ioctl2, |
474 | .open = fm_v4l2_fops_open, |
475 | .release = fm_v4l2_fops_release, |
476 | }; |
477 | |
478 | static const struct v4l2_ctrl_ops fm_ctrl_ops = { |
479 | .s_ctrl = fm_v4l2_s_ctrl, |
480 | .g_volatile_ctrl = fm_g_volatile_ctrl, |
481 | }; |
482 | static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = { |
483 | .vidioc_querycap = fm_v4l2_vidioc_querycap, |
484 | .vidioc_g_audio = fm_v4l2_vidioc_g_audio, |
485 | .vidioc_s_audio = fm_v4l2_vidioc_s_audio, |
486 | .vidioc_g_tuner = fm_v4l2_vidioc_g_tuner, |
487 | .vidioc_s_tuner = fm_v4l2_vidioc_s_tuner, |
488 | .vidioc_g_frequency = fm_v4l2_vidioc_g_freq, |
489 | .vidioc_s_frequency = fm_v4l2_vidioc_s_freq, |
490 | .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek, |
491 | .vidioc_g_modulator = fm_v4l2_vidioc_g_modulator, |
492 | .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator |
493 | }; |
494 | |
495 | /* V4L2 RADIO device parent structure */ |
496 | static const struct video_device fm_viddev_template = { |
497 | .fops = &fm_drv_fops, |
498 | .ioctl_ops = &fm_drv_ioctl_ops, |
499 | .name = FM_DRV_NAME, |
500 | .release = video_device_release_empty, |
501 | /* |
502 | * To ensure both the tuner and modulator ioctls are accessible we |
503 | * set the vfl_dir to M2M to indicate this. |
504 | * |
505 | * It is not really a mem2mem device of course, but it can both receive |
506 | * and transmit using the same radio device. It's the only radio driver |
507 | * that does this and it should really be split in two radio devices, |
508 | * but that would affect applications using this driver. |
509 | */ |
510 | .vfl_dir = VFL_DIR_M2M, |
511 | .device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER | V4L2_CAP_RADIO | |
512 | V4L2_CAP_MODULATOR | V4L2_CAP_AUDIO | |
513 | V4L2_CAP_READWRITE | V4L2_CAP_RDS_CAPTURE, |
514 | }; |
515 | |
516 | int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr) |
517 | { |
518 | struct v4l2_ctrl *ctrl; |
519 | int ret; |
520 | |
521 | strscpy(fmdev->v4l2_dev.name, FM_DRV_NAME, |
522 | sizeof(fmdev->v4l2_dev.name)); |
523 | ret = v4l2_device_register(NULL, v4l2_dev: &fmdev->v4l2_dev); |
524 | if (ret < 0) |
525 | return ret; |
526 | |
527 | /* Init mutex for core locking */ |
528 | mutex_init(&fmdev->mutex); |
529 | |
530 | /* Setup FM driver's V4L2 properties */ |
531 | gradio_dev = fm_viddev_template; |
532 | |
533 | video_set_drvdata(vdev: &gradio_dev, data: fmdev); |
534 | |
535 | gradio_dev.lock = &fmdev->mutex; |
536 | gradio_dev.v4l2_dev = &fmdev->v4l2_dev; |
537 | |
538 | /* Register with V4L2 subsystem as RADIO device */ |
539 | if (video_register_device(vdev: &gradio_dev, type: VFL_TYPE_RADIO, nr: radio_nr)) { |
540 | v4l2_device_unregister(v4l2_dev: &fmdev->v4l2_dev); |
541 | fmerr("Could not register video device\n" ); |
542 | return -ENOMEM; |
543 | } |
544 | |
545 | fmdev->radio_dev = &gradio_dev; |
546 | |
547 | /* Register to v4l2 ctrl handler framework */ |
548 | fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler; |
549 | |
550 | ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5); |
551 | if (ret < 0) { |
552 | fmerr("(fmdev): Can't init ctrl handler\n" ); |
553 | v4l2_ctrl_handler_free(hdl: &fmdev->ctrl_handler); |
554 | video_unregister_device(vdev: fmdev->radio_dev); |
555 | v4l2_device_unregister(v4l2_dev: &fmdev->v4l2_dev); |
556 | return -EBUSY; |
557 | } |
558 | |
559 | /* |
560 | * Following controls are handled by V4L2 control framework. |
561 | * Added in ascending ID order. |
562 | */ |
563 | v4l2_ctrl_new_std(hdl: &fmdev->ctrl_handler, ops: &fm_ctrl_ops, |
564 | V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN, |
565 | FM_RX_VOLUME_MAX, step: 1, FM_RX_VOLUME_MAX); |
566 | |
567 | v4l2_ctrl_new_std(hdl: &fmdev->ctrl_handler, ops: &fm_ctrl_ops, |
568 | V4L2_CID_AUDIO_MUTE, min: 0, max: 1, step: 1, def: 1); |
569 | |
570 | v4l2_ctrl_new_std_menu(hdl: &fmdev->ctrl_handler, ops: &fm_ctrl_ops, |
571 | V4L2_CID_TUNE_PREEMPHASIS, max: V4L2_PREEMPHASIS_75_uS, |
572 | mask: 0, def: V4L2_PREEMPHASIS_75_uS); |
573 | |
574 | v4l2_ctrl_new_std(hdl: &fmdev->ctrl_handler, ops: &fm_ctrl_ops, |
575 | V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW, |
576 | FM_PWR_LVL_HIGH, step: 1, FM_PWR_LVL_HIGH); |
577 | |
578 | ctrl = v4l2_ctrl_new_std(hdl: &fmdev->ctrl_handler, ops: &fm_ctrl_ops, |
579 | V4L2_CID_TUNE_ANTENNA_CAPACITOR, min: 0, |
580 | max: 255, step: 1, def: 255); |
581 | |
582 | if (ctrl) |
583 | ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
584 | |
585 | return 0; |
586 | } |
587 | |
588 | void *fm_v4l2_deinit_video_device(void) |
589 | { |
590 | struct fmdev *fmdev; |
591 | |
592 | |
593 | fmdev = video_get_drvdata(vdev: &gradio_dev); |
594 | |
595 | /* Unregister to v4l2 ctrl handler framework*/ |
596 | v4l2_ctrl_handler_free(hdl: &fmdev->ctrl_handler); |
597 | |
598 | /* Unregister RADIO device from V4L2 subsystem */ |
599 | video_unregister_device(vdev: &gradio_dev); |
600 | |
601 | v4l2_device_unregister(v4l2_dev: &fmdev->v4l2_dev); |
602 | |
603 | return fmdev; |
604 | } |
605 | |