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authorManjunatha Halli <manjunatha_halli@ti.com>2011-01-11 04:34:26 -0500
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-21 19:32:35 -0400
commit7e38849631c2f570fe66b52b5b54697fe338f194 (patch)
treee7bc1565f54352f9466d674e8f36c6a307e3022b /drivers/media/radio
parent8d19824ba2ef37ff989bee5941c87b45c4c6f468 (diff)
[media] drivers:media:radio: wl128x: FM Driver V4L2 sources
This module interfaces V4L2 subsystem and FM common module. It registers itself with V4L2 as Radio module. Signed-off-by: Manjunatha Halli <manjunatha_halli@ti.com> Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio')
-rw-r--r--drivers/media/radio/wl128x/fmdrv_v4l2.c580
-rw-r--r--drivers/media/radio/wl128x/fmdrv_v4l2.h33
2 files changed, 613 insertions, 0 deletions
diff --git a/drivers/media/radio/wl128x/fmdrv_v4l2.c b/drivers/media/radio/wl128x/fmdrv_v4l2.c
new file mode 100644
index 000000000000..d50e5ac75ab6
--- /dev/null
+++ b/drivers/media/radio/wl128x/fmdrv_v4l2.c
@@ -0,0 +1,580 @@
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
31#include "fmdrv.h"
32#include "fmdrv_v4l2.h"
33#include "fmdrv_common.h"
34#include "fmdrv_rx.h"
35#include "fmdrv_tx.h"
36
37static struct video_device *gradio_dev;
38static u8 radio_disconnected;
39
40/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */
41
42/* Read RX RDS data */
43static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf,
44 size_t count, loff_t *ppos)
45{
46 u8 rds_mode;
47 int ret;
48 struct fmdev *fmdev;
49
50 fmdev = video_drvdata(file);
51
52 if (!radio_disconnected) {
53 fmerr("FM device is already disconnected\n");
54 return -EIO;
55 }
56
57 /* Turn on RDS mode , if it is disabled */
58 ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
59 if (ret < 0) {
60 fmerr("Unable to read current rds mode\n");
61 return ret;
62 }
63
64 if (rds_mode == FM_RDS_DISABLE) {
65 ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
66 if (ret < 0) {
67 fmerr("Failed to enable rds mode\n");
68 return ret;
69 }
70 }
71
72 /* Copy RDS data from internal buffer to user buffer */
73 return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
74}
75
76/* Write TX RDS data */
77static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf,
78 size_t count, loff_t *ppos)
79{
80 struct tx_rds rds;
81 int ret;
82 struct fmdev *fmdev;
83
84 ret = copy_from_user(&rds, buf, sizeof(rds));
85 fmdbg("(%d)type: %d, text %s, af %d\n",
86 ret, rds.text_type, rds.text, rds.af_freq);
87
88 fmdev = video_drvdata(file);
89 fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
90 fm_tx_set_af(fmdev, rds.af_freq);
91
92 return 0;
93}
94
95static u32 fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts)
96{
97 int ret;
98 struct fmdev *fmdev;
99
100 fmdev = video_drvdata(file);
101 ret = fmc_is_rds_data_available(fmdev, file, pts);
102 if (ret < 0)
103 return POLLIN | POLLRDNORM;
104
105 return 0;
106}
107
108/*
109 * Handle open request for "/dev/radioX" device.
110 * Start with FM RX mode as default.
111 */
112static int fm_v4l2_fops_open(struct file *file)
113{
114 int ret;
115 struct fmdev *fmdev = NULL;
116
117 /* Don't allow multiple open */
118 if (radio_disconnected) {
119 fmerr("FM device is already opened\n");
120 return -EBUSY;
121 }
122
123 fmdev = video_drvdata(file);
124
125 ret = fmc_prepare(fmdev);
126 if (ret < 0) {
127 fmerr("Unable to prepare FM CORE\n");
128 return ret;
129 }
130
131 fmdbg("Load FM RX firmware..\n");
132
133 ret = fmc_set_mode(fmdev, FM_MODE_RX);
134 if (ret < 0) {
135 fmerr("Unable to load FM RX firmware\n");
136 return ret;
137 }
138 radio_disconnected = 1;
139
140 return ret;
141}
142
143static int fm_v4l2_fops_release(struct file *file)
144{
145 int ret;
146 struct fmdev *fmdev;
147
148 fmdev = video_drvdata(file);
149 if (!radio_disconnected) {
150 fmdbg("FM device is already closed\n");
151 return 0;
152 }
153
154 ret = fmc_set_mode(fmdev, FM_MODE_OFF);
155 if (ret < 0) {
156 fmerr("Unable to turn off the chip\n");
157 return ret;
158 }
159
160 ret = fmc_release(fmdev);
161 if (ret < 0) {
162 fmerr("FM CORE release failed\n");
163 return ret;
164 }
165 radio_disconnected = 0;
166
167 return ret;
168}
169
170/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */
171static int fm_v4l2_vidioc_querycap(struct file *file, void *priv,
172 struct v4l2_capability *capability)
173{
174 strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver));
175 strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME,
176 sizeof(capability->card));
177 sprintf(capability->bus_info, "UART");
178 capability->version = FM_DRV_RADIO_VERSION;
179 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER |
180 V4L2_CAP_RADIO | V4L2_CAP_MODULATOR |
181 V4L2_CAP_AUDIO | V4L2_CAP_READWRITE |
182 V4L2_CAP_RDS_CAPTURE;
183
184 return 0;
185}
186
187static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
188{
189 struct fmdev *fmdev = container_of(ctrl->handler,
190 struct fmdev, ctrl_handler);
191
192 switch (ctrl->id) {
193 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
194 ctrl->val = fm_tx_get_tune_cap_val(fmdev);
195 break;
196 default:
197 fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id);
198 break;
199 }
200
201 return 0;
202}
203
204static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl)
205{
206 struct fmdev *fmdev = container_of(ctrl->handler,
207 struct fmdev, ctrl_handler);
208
209 switch (ctrl->id) {
210 case V4L2_CID_AUDIO_VOLUME: /* set volume */
211 return fm_rx_set_volume(fmdev, (u16)ctrl->val);
212
213 case V4L2_CID_AUDIO_MUTE: /* set mute */
214 return fmc_set_mute_mode(fmdev, (u8)ctrl->val);
215
216 case V4L2_CID_TUNE_POWER_LEVEL:
217 /* set TX power level - ext control */
218 return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val);
219
220 case V4L2_CID_TUNE_PREEMPHASIS:
221 return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val);
222
223 default:
224 return -EINVAL;
225 }
226}
227
228static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv,
229 struct v4l2_audio *audio)
230{
231 memset(audio, 0, sizeof(*audio));
232 strcpy(audio->name, "Radio");
233 audio->capability = V4L2_AUDCAP_STEREO;
234
235 return 0;
236}
237
238static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv,
239 struct v4l2_audio *audio)
240{
241 if (audio->index != 0)
242 return -EINVAL;
243
244 return 0;
245}
246
247/* Get tuner attributes. If current mode is NOT RX, return error */
248static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv,
249 struct v4l2_tuner *tuner)
250{
251 struct fmdev *fmdev = video_drvdata(file);
252 u32 bottom_freq;
253 u32 top_freq;
254 u16 stereo_mono_mode;
255 u16 rssilvl;
256 int ret;
257
258 if (tuner->index != 0)
259 return -EINVAL;
260
261 if (fmdev->curr_fmmode != FM_MODE_RX)
262 return -EPERM;
263
264 ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq);
265 if (ret != 0)
266 return ret;
267
268 ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode);
269 if (ret != 0)
270 return ret;
271
272 ret = fm_rx_get_rssi_level(fmdev, &rssilvl);
273 if (ret != 0)
274 return ret;
275
276 strcpy(tuner->name, "FM");
277 tuner->type = V4L2_TUNER_RADIO;
278 /* Store rangelow and rangehigh freq in unit of 62.5 Hz */
279 tuner->rangelow = bottom_freq * 16;
280 tuner->rangehigh = top_freq * 16;
281 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
282 ((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0);
283 tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
284 V4L2_TUNER_CAP_LOW;
285 tuner->audmode = (stereo_mono_mode ?
286 V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO);
287
288 /*
289 * Actual rssi value lies in between -128 to +127.
290 * Convert this range from 0 to 255 by adding +128
291 */
292 rssilvl += 128;
293
294 /*
295 * Return signal strength value should be within 0 to 65535.
296 * Find out correct signal radio by multiplying (65535/255) = 257
297 */
298 tuner->signal = rssilvl * 257;
299 tuner->afc = 0;
300
301 return ret;
302}
303
304/*
305 * Set tuner attributes. If current mode is NOT RX, set to RX.
306 * Currently, we set only audio mode (mono/stereo) and RDS state (on/off).
307 * Should we set other tuner attributes, too?
308 */
309static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv,
310 struct v4l2_tuner *tuner)
311{
312 struct fmdev *fmdev = video_drvdata(file);
313 u16 aud_mode;
314 u8 rds_mode;
315 int ret;
316
317 if (tuner->index != 0)
318 return -EINVAL;
319
320 aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ?
321 FM_STEREO_MODE : FM_MONO_MODE;
322 rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ?
323 FM_RDS_ENABLE : FM_RDS_DISABLE;
324
325 if (fmdev->curr_fmmode != FM_MODE_RX) {
326 ret = fmc_set_mode(fmdev, FM_MODE_RX);
327 if (ret < 0) {
328 fmerr("Failed to set RX mode\n");
329 return ret;
330 }
331 }
332
333 ret = fmc_set_stereo_mono(fmdev, aud_mode);
334 if (ret < 0) {
335 fmerr("Failed to set RX stereo/mono mode\n");
336 return ret;
337 }
338
339 ret = fmc_set_rds_mode(fmdev, rds_mode);
340 if (ret < 0)
341 fmerr("Failed to set RX RDS mode\n");
342
343 return ret;
344}
345
346/* Get tuner or modulator radio frequency */
347static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv,
348 struct v4l2_frequency *freq)
349{
350 struct fmdev *fmdev = video_drvdata(file);
351 int ret;
352
353 ret = fmc_get_freq(fmdev, &freq->frequency);
354 if (ret < 0) {
355 fmerr("Failed to get frequency\n");
356 return ret;
357 }
358
359 /* Frequency unit of 62.5 Hz*/
360 freq->frequency = (u32) freq->frequency * 16;
361
362 return 0;
363}
364
365/* Set tuner or modulator radio frequency */
366static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv,
367 struct v4l2_frequency *freq)
368{
369 struct fmdev *fmdev = video_drvdata(file);
370
371 /*
372 * As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency
373 * in units of 62.5 Hz.
374 */
375 freq->frequency = (u32)(freq->frequency / 16);
376
377 return fmc_set_freq(fmdev, freq->frequency);
378}
379
380/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */
381static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv,
382 struct v4l2_hw_freq_seek *seek)
383{
384 struct fmdev *fmdev = video_drvdata(file);
385 int ret;
386
387 if (fmdev->curr_fmmode != FM_MODE_RX) {
388 ret = fmc_set_mode(fmdev, FM_MODE_RX);
389 if (ret != 0) {
390 fmerr("Failed to set RX mode\n");
391 return ret;
392 }
393 }
394
395 ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around,
396 seek->spacing);
397 if (ret < 0)
398 fmerr("RX seek failed - %d\n", ret);
399
400 return ret;
401}
402/* Get modulator attributes. If mode is not TX, return no attributes. */
403static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv,
404 struct v4l2_modulator *mod)
405{
406 struct fmdev *fmdev = video_drvdata(file);;
407
408 if (mod->index != 0)
409 return -EINVAL;
410
411 if (fmdev->curr_fmmode != FM_MODE_TX)
412 return -EPERM;
413
414 mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ?
415 V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) |
416 ((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ?
417 V4L2_TUNER_SUB_RDS : 0);
418
419 mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
420 V4L2_TUNER_CAP_LOW;
421
422 return 0;
423}
424
425/* Set modulator attributes. If mode is not TX, set to TX. */
426static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv,
427 struct v4l2_modulator *mod)
428{
429 struct fmdev *fmdev = video_drvdata(file);
430 u8 rds_mode;
431 u16 aud_mode;
432 int ret;
433
434 if (mod->index != 0)
435 return -EINVAL;
436
437 if (fmdev->curr_fmmode != FM_MODE_TX) {
438 ret = fmc_set_mode(fmdev, FM_MODE_TX);
439 if (ret != 0) {
440 fmerr("Failed to set TX mode\n");
441 return ret;
442 }
443 }
444
445 aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ?
446 FM_STEREO_MODE : FM_MONO_MODE;
447 rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ?
448 FM_RDS_ENABLE : FM_RDS_DISABLE;
449 ret = fm_tx_set_stereo_mono(fmdev, aud_mode);
450 if (ret < 0) {
451 fmerr("Failed to set mono/stereo mode for TX\n");
452 return ret;
453 }
454 ret = fm_tx_set_rds_mode(fmdev, rds_mode);
455 if (ret < 0)
456 fmerr("Failed to set rds mode for TX\n");
457
458 return ret;
459}
460
461static const struct v4l2_file_operations fm_drv_fops = {
462 .owner = THIS_MODULE,
463 .read = fm_v4l2_fops_read,
464 .write = fm_v4l2_fops_write,
465 .poll = fm_v4l2_fops_poll,
466 .unlocked_ioctl = video_ioctl2,
467 .open = fm_v4l2_fops_open,
468 .release = fm_v4l2_fops_release,
469};
470
471static const struct v4l2_ctrl_ops fm_ctrl_ops = {
472 .s_ctrl = fm_v4l2_s_ctrl,
473 .g_volatile_ctrl = fm_g_volatile_ctrl,
474};
475static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
476 .vidioc_querycap = fm_v4l2_vidioc_querycap,
477 .vidioc_g_audio = fm_v4l2_vidioc_g_audio,
478 .vidioc_s_audio = fm_v4l2_vidioc_s_audio,
479 .vidioc_g_tuner = fm_v4l2_vidioc_g_tuner,
480 .vidioc_s_tuner = fm_v4l2_vidioc_s_tuner,
481 .vidioc_g_frequency = fm_v4l2_vidioc_g_freq,
482 .vidioc_s_frequency = fm_v4l2_vidioc_s_freq,
483 .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek,
484 .vidioc_g_modulator = fm_v4l2_vidioc_g_modulator,
485 .vidioc_s_modulator = fm_v4l2_vidioc_s_modulator
486};
487
488/* V4L2 RADIO device parent structure */
489static struct video_device fm_viddev_template = {
490 .fops = &fm_drv_fops,
491 .ioctl_ops = &fm_drv_ioctl_ops,
492 .name = FM_DRV_NAME,
493 .release = video_device_release,
494};
495
496int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr)
497{
498 struct v4l2_ctrl *ctrl;
499 int ret;
500
501 /* Init mutex for core locking */
502 mutex_init(&fmdev->mutex);
503
504 /* Allocate new video device */
505 gradio_dev = video_device_alloc();
506 if (NULL == gradio_dev) {
507 fmerr("Can't allocate video device\n");
508 return -ENOMEM;
509 }
510
511 /* Setup FM driver's V4L2 properties */
512 memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template));
513
514 video_set_drvdata(gradio_dev, fmdev);
515
516 gradio_dev->lock = &fmdev->mutex;
517
518 /* Register with V4L2 subsystem as RADIO device */
519 if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) {
520 video_device_release(gradio_dev);
521 fmerr("Could not register video device\n");
522 return -ENOMEM;
523 }
524
525 fmdev->radio_dev = gradio_dev;
526
527 /* Register to v4l2 ctrl handler framework */
528 fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler;
529
530 ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5);
531 if (ret < 0) {
532 fmerr("(fmdev): Can't init ctrl handler\n");
533 v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
534 return -EBUSY;
535 }
536
537 /*
538 * Following controls are handled by V4L2 control framework.
539 * Added in ascending ID order.
540 */
541 v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
542 V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN,
543 FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX);
544
545 v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
546 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
547
548 v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops,
549 V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS,
550 0, V4L2_PREEMPHASIS_75_uS);
551
552 v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
553 V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW,
554 FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH);
555
556 ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
557 V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0,
558 255, 1, 255);
559
560 if (ctrl)
561 ctrl->is_volatile = 1;
562
563 return 0;
564}
565
566void *fm_v4l2_deinit_video_device(void)
567{
568 struct fmdev *fmdev;
569
570
571 fmdev = video_get_drvdata(gradio_dev);
572
573 /* Unregister to v4l2 ctrl handler framework*/
574 v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
575
576 /* Unregister RADIO device from V4L2 subsystem */
577 video_unregister_device(gradio_dev);
578
579 return fmdev;
580}
diff --git a/drivers/media/radio/wl128x/fmdrv_v4l2.h b/drivers/media/radio/wl128x/fmdrv_v4l2.h
new file mode 100644
index 000000000000..0ba79d745e2f
--- /dev/null
+++ b/drivers/media/radio/wl128x/fmdrv_v4l2.h
@@ -0,0 +1,33 @@
1/*
2 * FM Driver for Connectivity chip of Texas Instruments.
3 *
4 * FM V4L2 module header.
5 *
6 * Copyright (C) 2011 Texas Instruments
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23#ifndef _FMDRV_V4L2_H
24#define _FMDRV_V4L2_H
25
26#include <media/v4l2-ioctl.h>
27#include <media/v4l2-common.h>
28#include <media/v4l2-ctrls.h>
29
30int fm_v4l2_init_video_device(struct fmdev *, int);
31void *fm_v4l2_deinit_video_device(void);
32
33#endif