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7e388496 MH |
1 | /* |
2 | * FM Driver for Connectivity chip of Texas Instruments. | |
3 | * This file provides interfaces to V4L2 subsystem. | |
4 | * | |
5 | * This module registers with V4L2 subsystem as Radio | |
6 | * data system interface (/dev/radio). During the registration, | |
7 | * it will expose two set of function pointers. | |
8 | * | |
9 | * 1) File operation related API (open, close, read, write, poll...etc). | |
10 | * 2) Set of V4L2 IOCTL complaint API. | |
11 | * | |
12 | * Copyright (C) 2011 Texas Instruments | |
13 | * Author: Raja Mani <raja_mani@ti.com> | |
14 | * Author: Manjunatha Halli <manjunatha_halli@ti.com> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License version 2 as | |
18 | * published by the Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
28 | * | |
29 | */ | |
30 | ||
35a24636 PG |
31 | #include <linux/export.h> |
32 | ||
7e388496 MH |
33 | #include "fmdrv.h" |
34 | #include "fmdrv_v4l2.h" | |
35 | #include "fmdrv_common.h" | |
36 | #include "fmdrv_rx.h" | |
37 | #include "fmdrv_tx.h" | |
38 | ||
39 | static struct video_device *gradio_dev; | |
40 | static u8 radio_disconnected; | |
41 | ||
42 | /* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */ | |
43 | ||
44 | /* Read RX RDS data */ | |
45 | static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf, | |
46 | size_t count, loff_t *ppos) | |
47 | { | |
48 | u8 rds_mode; | |
49 | int ret; | |
50 | struct fmdev *fmdev; | |
51 | ||
52 | fmdev = video_drvdata(file); | |
53 | ||
54 | if (!radio_disconnected) { | |
55 | fmerr("FM device is already disconnected\n"); | |
56 | return -EIO; | |
57 | } | |
58 | ||
a2e10b5a HV |
59 | if (mutex_lock_interruptible(&fmdev->mutex)) |
60 | return -ERESTARTSYS; | |
61 | ||
62 | /* Turn on RDS mode if it is disabled */ | |
7e388496 MH |
63 | ret = fm_rx_get_rds_mode(fmdev, &rds_mode); |
64 | if (ret < 0) { | |
65 | fmerr("Unable to read current rds mode\n"); | |
a2e10b5a | 66 | goto read_unlock; |
7e388496 MH |
67 | } |
68 | ||
69 | if (rds_mode == FM_RDS_DISABLE) { | |
70 | ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE); | |
71 | if (ret < 0) { | |
72 | fmerr("Failed to enable rds mode\n"); | |
a2e10b5a | 73 | goto read_unlock; |
7e388496 MH |
74 | } |
75 | } | |
76 | ||
77 | /* Copy RDS data from internal buffer to user buffer */ | |
a2e10b5a HV |
78 | ret = fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count); |
79 | read_unlock: | |
80 | mutex_unlock(&fmdev->mutex); | |
81 | return ret; | |
7e388496 MH |
82 | } |
83 | ||
84 | /* Write TX RDS data */ | |
85 | static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf, | |
86 | size_t count, loff_t *ppos) | |
87 | { | |
88 | struct tx_rds rds; | |
89 | int ret; | |
90 | struct fmdev *fmdev; | |
91 | ||
92 | ret = copy_from_user(&rds, buf, sizeof(rds)); | |
75c1ca36 | 93 | rds.text[sizeof(rds.text) - 1] = '\0'; |
7e388496 MH |
94 | fmdbg("(%d)type: %d, text %s, af %d\n", |
95 | ret, rds.text_type, rds.text, rds.af_freq); | |
eb70ac1b HV |
96 | if (ret) |
97 | return -EFAULT; | |
7e388496 MH |
98 | |
99 | fmdev = video_drvdata(file); | |
a2e10b5a HV |
100 | if (mutex_lock_interruptible(&fmdev->mutex)) |
101 | return -ERESTARTSYS; | |
7e388496 MH |
102 | fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); |
103 | fm_tx_set_af(fmdev, rds.af_freq); | |
a2e10b5a | 104 | mutex_unlock(&fmdev->mutex); |
7e388496 | 105 | |
eb70ac1b | 106 | return sizeof(rds); |
7e388496 MH |
107 | } |
108 | ||
109 | static u32 fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts) | |
110 | { | |
111 | int ret; | |
112 | struct fmdev *fmdev; | |
113 | ||
114 | fmdev = video_drvdata(file); | |
a2e10b5a | 115 | mutex_lock(&fmdev->mutex); |
7e388496 | 116 | ret = fmc_is_rds_data_available(fmdev, file, pts); |
a2e10b5a | 117 | mutex_unlock(&fmdev->mutex); |
7e388496 MH |
118 | if (ret < 0) |
119 | return POLLIN | POLLRDNORM; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | /* | |
125 | * Handle open request for "/dev/radioX" device. | |
126 | * Start with FM RX mode as default. | |
127 | */ | |
128 | static int fm_v4l2_fops_open(struct file *file) | |
129 | { | |
130 | int ret; | |
131 | struct fmdev *fmdev = NULL; | |
132 | ||
133 | /* Don't allow multiple open */ | |
134 | if (radio_disconnected) { | |
135 | fmerr("FM device is already opened\n"); | |
136 | return -EBUSY; | |
137 | } | |
138 | ||
139 | fmdev = video_drvdata(file); | |
140 | ||
a2e10b5a HV |
141 | if (mutex_lock_interruptible(&fmdev->mutex)) |
142 | return -ERESTARTSYS; | |
7e388496 MH |
143 | ret = fmc_prepare(fmdev); |
144 | if (ret < 0) { | |
145 | fmerr("Unable to prepare FM CORE\n"); | |
a2e10b5a | 146 | goto open_unlock; |
7e388496 MH |
147 | } |
148 | ||
149 | fmdbg("Load FM RX firmware..\n"); | |
150 | ||
151 | ret = fmc_set_mode(fmdev, FM_MODE_RX); | |
152 | if (ret < 0) { | |
153 | fmerr("Unable to load FM RX firmware\n"); | |
a2e10b5a | 154 | goto open_unlock; |
7e388496 MH |
155 | } |
156 | radio_disconnected = 1; | |
157 | ||
a2e10b5a HV |
158 | open_unlock: |
159 | mutex_unlock(&fmdev->mutex); | |
7e388496 MH |
160 | return ret; |
161 | } | |
162 | ||
163 | static int fm_v4l2_fops_release(struct file *file) | |
164 | { | |
165 | int ret; | |
166 | struct fmdev *fmdev; | |
167 | ||
168 | fmdev = video_drvdata(file); | |
169 | if (!radio_disconnected) { | |
170 | fmdbg("FM device is already closed\n"); | |
171 | return 0; | |
172 | } | |
173 | ||
a2e10b5a | 174 | mutex_lock(&fmdev->mutex); |
7e388496 MH |
175 | ret = fmc_set_mode(fmdev, FM_MODE_OFF); |
176 | if (ret < 0) { | |
177 | fmerr("Unable to turn off the chip\n"); | |
a2e10b5a | 178 | goto release_unlock; |
7e388496 MH |
179 | } |
180 | ||
181 | ret = fmc_release(fmdev); | |
182 | if (ret < 0) { | |
183 | fmerr("FM CORE release failed\n"); | |
a2e10b5a | 184 | goto release_unlock; |
7e388496 MH |
185 | } |
186 | radio_disconnected = 0; | |
187 | ||
a2e10b5a HV |
188 | release_unlock: |
189 | mutex_unlock(&fmdev->mutex); | |
7e388496 MH |
190 | return ret; |
191 | } | |
192 | ||
193 | /* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */ | |
194 | static int fm_v4l2_vidioc_querycap(struct file *file, void *priv, | |
195 | struct v4l2_capability *capability) | |
196 | { | |
197 | strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver)); | |
198 | strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME, | |
199 | sizeof(capability->card)); | |
200 | sprintf(capability->bus_info, "UART"); | |
7e388496 MH |
201 | capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER | |
202 | V4L2_CAP_RADIO | V4L2_CAP_MODULATOR | | |
203 | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | | |
204 | V4L2_CAP_RDS_CAPTURE; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl) | |
210 | { | |
211 | struct fmdev *fmdev = container_of(ctrl->handler, | |
212 | struct fmdev, ctrl_handler); | |
213 | ||
214 | switch (ctrl->id) { | |
215 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: | |
ddac5c10 | 216 | ctrl->val = fm_tx_get_tune_cap_val(fmdev); |
7e388496 MH |
217 | break; |
218 | default: | |
219 | fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id); | |
220 | break; | |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl) | |
227 | { | |
228 | struct fmdev *fmdev = container_of(ctrl->handler, | |
229 | struct fmdev, ctrl_handler); | |
230 | ||
231 | switch (ctrl->id) { | |
232 | case V4L2_CID_AUDIO_VOLUME: /* set volume */ | |
233 | return fm_rx_set_volume(fmdev, (u16)ctrl->val); | |
234 | ||
235 | case V4L2_CID_AUDIO_MUTE: /* set mute */ | |
236 | return fmc_set_mute_mode(fmdev, (u8)ctrl->val); | |
237 | ||
238 | case V4L2_CID_TUNE_POWER_LEVEL: | |
239 | /* set TX power level - ext control */ | |
240 | return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val); | |
241 | ||
242 | case V4L2_CID_TUNE_PREEMPHASIS: | |
243 | return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val); | |
244 | ||
245 | default: | |
246 | return -EINVAL; | |
247 | } | |
248 | } | |
249 | ||
250 | static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv, | |
251 | struct v4l2_audio *audio) | |
252 | { | |
253 | memset(audio, 0, sizeof(*audio)); | |
254 | strcpy(audio->name, "Radio"); | |
255 | audio->capability = V4L2_AUDCAP_STEREO; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv, | |
0e8025b9 | 261 | const struct v4l2_audio *audio) |
7e388496 MH |
262 | { |
263 | if (audio->index != 0) | |
264 | return -EINVAL; | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | /* Get tuner attributes. If current mode is NOT RX, return error */ | |
270 | static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv, | |
271 | struct v4l2_tuner *tuner) | |
272 | { | |
273 | struct fmdev *fmdev = video_drvdata(file); | |
274 | u32 bottom_freq; | |
275 | u32 top_freq; | |
276 | u16 stereo_mono_mode; | |
277 | u16 rssilvl; | |
278 | int ret; | |
279 | ||
280 | if (tuner->index != 0) | |
281 | return -EINVAL; | |
282 | ||
283 | if (fmdev->curr_fmmode != FM_MODE_RX) | |
284 | return -EPERM; | |
285 | ||
286 | ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq); | |
287 | if (ret != 0) | |
288 | return ret; | |
289 | ||
290 | ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode); | |
291 | if (ret != 0) | |
292 | return ret; | |
293 | ||
294 | ret = fm_rx_get_rssi_level(fmdev, &rssilvl); | |
295 | if (ret != 0) | |
296 | return ret; | |
297 | ||
298 | strcpy(tuner->name, "FM"); | |
299 | tuner->type = V4L2_TUNER_RADIO; | |
300 | /* Store rangelow and rangehigh freq in unit of 62.5 Hz */ | |
301 | tuner->rangelow = bottom_freq * 16; | |
302 | tuner->rangehigh = top_freq * 16; | |
303 | tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | | |
304 | ((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0); | |
305 | tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | | |
54f6019b HV |
306 | V4L2_TUNER_CAP_LOW | |
307 | V4L2_TUNER_CAP_HWSEEK_BOUNDED | | |
308 | V4L2_TUNER_CAP_HWSEEK_WRAP; | |
7e388496 MH |
309 | tuner->audmode = (stereo_mono_mode ? |
310 | V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO); | |
311 | ||
312 | /* | |
313 | * Actual rssi value lies in between -128 to +127. | |
314 | * Convert this range from 0 to 255 by adding +128 | |
315 | */ | |
316 | rssilvl += 128; | |
317 | ||
318 | /* | |
319 | * Return signal strength value should be within 0 to 65535. | |
320 | * Find out correct signal radio by multiplying (65535/255) = 257 | |
321 | */ | |
322 | tuner->signal = rssilvl * 257; | |
323 | tuner->afc = 0; | |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Set tuner attributes. If current mode is NOT RX, set to RX. | |
330 | * Currently, we set only audio mode (mono/stereo) and RDS state (on/off). | |
331 | * Should we set other tuner attributes, too? | |
332 | */ | |
333 | static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv, | |
334 | struct v4l2_tuner *tuner) | |
335 | { | |
336 | struct fmdev *fmdev = video_drvdata(file); | |
337 | u16 aud_mode; | |
338 | u8 rds_mode; | |
339 | int ret; | |
340 | ||
341 | if (tuner->index != 0) | |
342 | return -EINVAL; | |
343 | ||
344 | aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ? | |
345 | FM_STEREO_MODE : FM_MONO_MODE; | |
346 | rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ? | |
347 | FM_RDS_ENABLE : FM_RDS_DISABLE; | |
348 | ||
349 | if (fmdev->curr_fmmode != FM_MODE_RX) { | |
350 | ret = fmc_set_mode(fmdev, FM_MODE_RX); | |
351 | if (ret < 0) { | |
352 | fmerr("Failed to set RX mode\n"); | |
353 | return ret; | |
354 | } | |
355 | } | |
356 | ||
357 | ret = fmc_set_stereo_mono(fmdev, aud_mode); | |
358 | if (ret < 0) { | |
359 | fmerr("Failed to set RX stereo/mono mode\n"); | |
360 | return ret; | |
361 | } | |
362 | ||
363 | ret = fmc_set_rds_mode(fmdev, rds_mode); | |
364 | if (ret < 0) | |
365 | fmerr("Failed to set RX RDS mode\n"); | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
370 | /* Get tuner or modulator radio frequency */ | |
371 | static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv, | |
372 | struct v4l2_frequency *freq) | |
373 | { | |
374 | struct fmdev *fmdev = video_drvdata(file); | |
375 | int ret; | |
376 | ||
377 | ret = fmc_get_freq(fmdev, &freq->frequency); | |
378 | if (ret < 0) { | |
379 | fmerr("Failed to get frequency\n"); | |
380 | return ret; | |
381 | } | |
382 | ||
383 | /* Frequency unit of 62.5 Hz*/ | |
384 | freq->frequency = (u32) freq->frequency * 16; | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | /* Set tuner or modulator radio frequency */ | |
390 | static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv, | |
b530a447 | 391 | const struct v4l2_frequency *freq) |
7e388496 MH |
392 | { |
393 | struct fmdev *fmdev = video_drvdata(file); | |
394 | ||
395 | /* | |
396 | * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency | |
397 | * in units of 62.5 Hz. | |
398 | */ | |
b530a447 | 399 | return fmc_set_freq(fmdev, freq->frequency / 16); |
7e388496 MH |
400 | } |
401 | ||
402 | /* Set hardware frequency seek. If current mode is NOT RX, set it RX. */ | |
403 | static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv, | |
ec6f4328 | 404 | const struct v4l2_hw_freq_seek *seek) |
7e388496 MH |
405 | { |
406 | struct fmdev *fmdev = video_drvdata(file); | |
407 | int ret; | |
408 | ||
617ade61 HV |
409 | if (file->f_flags & O_NONBLOCK) |
410 | return -EWOULDBLOCK; | |
411 | ||
7e388496 MH |
412 | if (fmdev->curr_fmmode != FM_MODE_RX) { |
413 | ret = fmc_set_mode(fmdev, FM_MODE_RX); | |
414 | if (ret != 0) { | |
415 | fmerr("Failed to set RX mode\n"); | |
416 | return ret; | |
417 | } | |
418 | } | |
419 | ||
420 | ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around, | |
421 | seek->spacing); | |
422 | if (ret < 0) | |
423 | fmerr("RX seek failed - %d\n", ret); | |
424 | ||
425 | return ret; | |
426 | } | |
427 | /* Get modulator attributes. If mode is not TX, return no attributes. */ | |
428 | static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv, | |
429 | struct v4l2_modulator *mod) | |
430 | { | |
69932487 | 431 | struct fmdev *fmdev = video_drvdata(file); |
7e388496 MH |
432 | |
433 | if (mod->index != 0) | |
434 | return -EINVAL; | |
435 | ||
436 | if (fmdev->curr_fmmode != FM_MODE_TX) | |
437 | return -EPERM; | |
438 | ||
439 | mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ? | |
440 | V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) | | |
441 | ((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ? | |
442 | V4L2_TUNER_SUB_RDS : 0); | |
443 | ||
444 | mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS | | |
445 | V4L2_TUNER_CAP_LOW; | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | /* Set modulator attributes. If mode is not TX, set to TX. */ | |
451 | static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv, | |
3f70e1f5 | 452 | const struct v4l2_modulator *mod) |
7e388496 MH |
453 | { |
454 | struct fmdev *fmdev = video_drvdata(file); | |
455 | u8 rds_mode; | |
456 | u16 aud_mode; | |
457 | int ret; | |
458 | ||
459 | if (mod->index != 0) | |
460 | return -EINVAL; | |
461 | ||
462 | if (fmdev->curr_fmmode != FM_MODE_TX) { | |
463 | ret = fmc_set_mode(fmdev, FM_MODE_TX); | |
464 | if (ret != 0) { | |
465 | fmerr("Failed to set TX mode\n"); | |
466 | return ret; | |
467 | } | |
468 | } | |
469 | ||
470 | aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ? | |
471 | FM_STEREO_MODE : FM_MONO_MODE; | |
472 | rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ? | |
473 | FM_RDS_ENABLE : FM_RDS_DISABLE; | |
474 | ret = fm_tx_set_stereo_mono(fmdev, aud_mode); | |
475 | if (ret < 0) { | |
476 | fmerr("Failed to set mono/stereo mode for TX\n"); | |
477 | return ret; | |
478 | } | |
479 | ret = fm_tx_set_rds_mode(fmdev, rds_mode); | |
480 | if (ret < 0) | |
481 | fmerr("Failed to set rds mode for TX\n"); | |
482 | ||
483 | return ret; | |
484 | } | |
485 | ||
486 | static const struct v4l2_file_operations fm_drv_fops = { | |
487 | .owner = THIS_MODULE, | |
488 | .read = fm_v4l2_fops_read, | |
489 | .write = fm_v4l2_fops_write, | |
490 | .poll = fm_v4l2_fops_poll, | |
491 | .unlocked_ioctl = video_ioctl2, | |
492 | .open = fm_v4l2_fops_open, | |
493 | .release = fm_v4l2_fops_release, | |
494 | }; | |
495 | ||
496 | static const struct v4l2_ctrl_ops fm_ctrl_ops = { | |
497 | .s_ctrl = fm_v4l2_s_ctrl, | |
498 | .g_volatile_ctrl = fm_g_volatile_ctrl, | |
499 | }; | |
500 | static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = { | |
501 | .vidioc_querycap = fm_v4l2_vidioc_querycap, | |
502 | .vidioc_g_audio = fm_v4l2_vidioc_g_audio, | |
503 | .vidioc_s_audio = fm_v4l2_vidioc_s_audio, | |
504 | .vidioc_g_tuner = fm_v4l2_vidioc_g_tuner, | |
505 | .vidioc_s_tuner = fm_v4l2_vidioc_s_tuner, | |
506 | .vidioc_g_frequency = fm_v4l2_vidioc_g_freq, | |
507 | .vidioc_s_frequency = fm_v4l2_vidioc_s_freq, | |
508 | .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek, | |
509 | .vidioc_g_modulator = fm_v4l2_vidioc_g_modulator, | |
510 | .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator | |
511 | }; | |
512 | ||
513 | /* V4L2 RADIO device parent structure */ | |
514 | static struct video_device fm_viddev_template = { | |
515 | .fops = &fm_drv_fops, | |
516 | .ioctl_ops = &fm_drv_ioctl_ops, | |
517 | .name = FM_DRV_NAME, | |
518 | .release = video_device_release, | |
ce4a3d52 HV |
519 | /* |
520 | * To ensure both the tuner and modulator ioctls are accessible we | |
521 | * set the vfl_dir to M2M to indicate this. | |
522 | * | |
523 | * It is not really a mem2mem device of course, but it can both receive | |
524 | * and transmit using the same radio device. It's the only radio driver | |
525 | * that does this and it should really be split in two radio devices, | |
526 | * but that would affect applications using this driver. | |
527 | */ | |
528 | .vfl_dir = VFL_DIR_M2M, | |
7e388496 MH |
529 | }; |
530 | ||
531 | int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr) | |
532 | { | |
533 | struct v4l2_ctrl *ctrl; | |
534 | int ret; | |
535 | ||
536 | /* Init mutex for core locking */ | |
537 | mutex_init(&fmdev->mutex); | |
538 | ||
539 | /* Allocate new video device */ | |
540 | gradio_dev = video_device_alloc(); | |
541 | if (NULL == gradio_dev) { | |
542 | fmerr("Can't allocate video device\n"); | |
543 | return -ENOMEM; | |
544 | } | |
545 | ||
546 | /* Setup FM driver's V4L2 properties */ | |
547 | memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template)); | |
548 | ||
549 | video_set_drvdata(gradio_dev, fmdev); | |
550 | ||
551 | gradio_dev->lock = &fmdev->mutex; | |
552 | ||
553 | /* Register with V4L2 subsystem as RADIO device */ | |
554 | if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) { | |
555 | video_device_release(gradio_dev); | |
556 | fmerr("Could not register video device\n"); | |
557 | return -ENOMEM; | |
558 | } | |
559 | ||
560 | fmdev->radio_dev = gradio_dev; | |
561 | ||
562 | /* Register to v4l2 ctrl handler framework */ | |
563 | fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler; | |
564 | ||
565 | ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5); | |
566 | if (ret < 0) { | |
567 | fmerr("(fmdev): Can't init ctrl handler\n"); | |
568 | v4l2_ctrl_handler_free(&fmdev->ctrl_handler); | |
569 | return -EBUSY; | |
570 | } | |
571 | ||
572 | /* | |
573 | * Following controls are handled by V4L2 control framework. | |
574 | * Added in ascending ID order. | |
575 | */ | |
576 | v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, | |
577 | V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN, | |
578 | FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX); | |
579 | ||
580 | v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, | |
581 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); | |
582 | ||
583 | v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops, | |
584 | V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS, | |
585 | 0, V4L2_PREEMPHASIS_75_uS); | |
586 | ||
587 | v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, | |
588 | V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW, | |
589 | FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH); | |
590 | ||
591 | ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops, | |
592 | V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0, | |
593 | 255, 1, 255); | |
594 | ||
595 | if (ctrl) | |
88365105 | 596 | ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; |
7e388496 MH |
597 | |
598 | return 0; | |
599 | } | |
600 | ||
601 | void *fm_v4l2_deinit_video_device(void) | |
602 | { | |
603 | struct fmdev *fmdev; | |
604 | ||
605 | ||
606 | fmdev = video_get_drvdata(gradio_dev); | |
607 | ||
608 | /* Unregister to v4l2 ctrl handler framework*/ | |
609 | v4l2_ctrl_handler_free(&fmdev->ctrl_handler); | |
610 | ||
611 | /* Unregister RADIO device from V4L2 subsystem */ | |
612 | video_unregister_device(gradio_dev); | |
613 | ||
614 | return fmdev; | |
615 | } |