2 * drivers/media/radio/si470x/radio-si470x-common.c
4 * Driver for radios with Silicon Labs Si470x FM Radio Receivers
6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
28 * - First working version
29 * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
31 * - Improved error handling, every function now returns errno
32 * - Improved multi user access (start/mute/stop)
33 * - Channel doesn't get lost anymore after start/mute/stop
34 * - RDS support added (polling mode via interrupt EP 1)
35 * - marked default module parameters with *value*
36 * - switched from bit structs to bit masks
37 * - header file cleaned and integrated
38 * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
40 * - hex values are now lower case
41 * - commented USB ID for ADS/Tech moved on todo list
42 * - blacklisted si470x in hid-quirks.c
43 * - rds buffer handling functions integrated into *_work, *_read
44 * - rds_command in si470x_poll exchanged against simple retval
45 * - check for firmware version 15
46 * - code order and prototypes still remain the same
47 * - spacing and bottom of band codes remain the same
48 * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
50 * - code reordered to avoid function prototypes
51 * - switch/case defaults are now more user-friendly
52 * - unified comment style
53 * - applied all checkpatch.pl v1.12 suggestions
54 * except the warning about the too long lines with bit comments
55 * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
56 * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
58 * - avoid poss. locking when doing copy_to_user which may sleep
59 * - RDS is automatically activated on read now
60 * - code cleaned of unnecessary rds_commands
61 * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
62 * (thanks to Guillaume RAMOUSSE)
63 * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
65 * - number of seek_retries changed to tune_timeout
66 * - fixed problem with incomplete tune operations by own buffers
67 * - optimization of variables and printf types
68 * - improved error logging
69 * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
70 * Oliver Neukum <oliver@neukum.org>
72 * - fixed coverity checker warnings in *_usb_driver_disconnect
73 * - probe()/open() race by correct ordering in probe()
74 * - DMA coherency rules by separate allocation of all buffers
75 * - use of endianness macros
76 * - abuse of spinlock, replaced by mutex
77 * - racy handling of timer in disconnect,
78 * replaced by delayed_work
79 * - racy interruptible_sleep_on(),
80 * replaced with wait_event_interruptible()
81 * - handle signals in read()
82 * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
83 * Oliver Neukum <oliver@neukum.org>
85 * - usb autosuspend support
87 * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
89 * - hardware frequency seek support
91 * - more safety checks, let si470x_get_freq return errno
92 * - vidioc behavior corrected according to v4l2 spec
93 * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
94 * - add support for KWorld USB FM Radio FM700
95 * - blacklisted KWorld radio in hid-core.c and hid-ids.h
96 * 2008-12-03 Mark Lord <mlord@pobox.com>
97 * - add support for DealExtreme USB Radio
98 * 2009-01-31 Bob Ross <pigiron@gmx.com>
99 * - correction of stereo detection/setting
100 * - correction of signal strength indicator scaling
101 * 2009-01-31 Rick Bronson <rick@efn.org>
102 * Tobias Lorenz <tobias.lorenz@gmx.net>
103 * - add LED status output
104 * - get HW/SW version from scratchpad
105 * 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
107 * - add support for interrupt mode for RDS endpoint,
108 * instead of polling.
109 * Improves RDS reception significantly
113 /* kernel includes */
114 #include "radio-si470x.h"
118 /**************************************************************************
120 **************************************************************************/
123 /* 0: 200 kHz (USA, Australia) */
124 /* 1: 100 kHz (Europe, Japan) */
126 static unsigned short space = 2;
127 module_param(space, ushort, 0444);
128 MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
130 /* Bottom of Band (MHz) */
131 /* 0: 87.5 - 108 MHz (USA, Europe)*/
132 /* 1: 76 - 108 MHz (Japan wide band) */
133 /* 2: 76 - 90 MHz (Japan) */
134 static unsigned short band = 1;
135 module_param(band, ushort, 0444);
136 MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
140 /* 1: 50 us (Europe, Australia, Japan) */
141 static unsigned short de = 1;
142 module_param(de, ushort, 0444);
143 MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
146 static unsigned int tune_timeout = 3000;
147 module_param(tune_timeout, uint, 0644);
148 MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
151 static unsigned int seek_timeout = 5000;
152 module_param(seek_timeout, uint, 0644);
153 MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
157 /**************************************************************************
159 **************************************************************************/
162 * si470x_set_chan - set the channel
164 static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
167 unsigned long timeout;
171 radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
172 radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
173 retval = si470x_set_register(radio, CHANNEL);
177 /* wait till tune operation has completed */
178 timeout = jiffies + msecs_to_jiffies(tune_timeout);
180 retval = si470x_get_register(radio, STATUSRSSI);
183 timed_out = time_after(jiffies, timeout);
184 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
186 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
187 dev_warn(&radio->videodev->dev, "tune does not complete\n");
189 dev_warn(&radio->videodev->dev,
190 "tune timed out after %u ms\n", tune_timeout);
194 radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
195 retval = si470x_set_register(radio, CHANNEL);
203 * si470x_get_freq - get the frequency
205 static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
207 unsigned int spacing, band_bottom;
212 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
213 /* 0: 200 kHz (USA, Australia) */
215 spacing = 0.200 * FREQ_MUL; break;
216 /* 1: 100 kHz (Europe, Japan) */
218 spacing = 0.100 * FREQ_MUL; break;
221 spacing = 0.050 * FREQ_MUL; break;
224 /* Bottom of Band (MHz) */
225 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
226 /* 0: 87.5 - 108 MHz (USA, Europe) */
228 band_bottom = 87.5 * FREQ_MUL; break;
229 /* 1: 76 - 108 MHz (Japan wide band) */
231 band_bottom = 76 * FREQ_MUL; break;
232 /* 2: 76 - 90 MHz (Japan) */
234 band_bottom = 76 * FREQ_MUL; break;
238 retval = si470x_get_register(radio, READCHAN);
239 chan = radio->registers[READCHAN] & READCHAN_READCHAN;
241 /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
242 *freq = chan * spacing + band_bottom;
249 * si470x_set_freq - set the frequency
251 int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
253 unsigned int spacing, band_bottom;
257 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
258 /* 0: 200 kHz (USA, Australia) */
260 spacing = 0.200 * FREQ_MUL; break;
261 /* 1: 100 kHz (Europe, Japan) */
263 spacing = 0.100 * FREQ_MUL; break;
266 spacing = 0.050 * FREQ_MUL; break;
269 /* Bottom of Band (MHz) */
270 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
271 /* 0: 87.5 - 108 MHz (USA, Europe) */
273 band_bottom = 87.5 * FREQ_MUL; break;
274 /* 1: 76 - 108 MHz (Japan wide band) */
276 band_bottom = 76 * FREQ_MUL; break;
277 /* 2: 76 - 90 MHz (Japan) */
279 band_bottom = 76 * FREQ_MUL; break;
282 /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
283 chan = (freq - band_bottom) / spacing;
285 return si470x_set_chan(radio, chan);
290 * si470x_set_seek - set seek
292 static int si470x_set_seek(struct si470x_device *radio,
293 unsigned int wrap_around, unsigned int seek_upward)
296 unsigned long timeout;
300 radio->registers[POWERCFG] |= POWERCFG_SEEK;
301 if (wrap_around == 1)
302 radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
304 radio->registers[POWERCFG] |= POWERCFG_SKMODE;
305 if (seek_upward == 1)
306 radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
308 radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
309 retval = si470x_set_register(radio, POWERCFG);
313 /* wait till seek operation has completed */
314 timeout = jiffies + msecs_to_jiffies(seek_timeout);
316 retval = si470x_get_register(radio, STATUSRSSI);
319 timed_out = time_after(jiffies, timeout);
320 } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
322 if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
323 dev_warn(&radio->videodev->dev, "seek does not complete\n");
324 if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
325 dev_warn(&radio->videodev->dev,
326 "seek failed / band limit reached\n");
328 dev_warn(&radio->videodev->dev,
329 "seek timed out after %u ms\n", seek_timeout);
333 radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
334 retval = si470x_set_register(radio, POWERCFG);
337 /* try again, if timed out */
338 if ((retval == 0) && timed_out)
346 * si470x_start - switch on radio
348 int si470x_start(struct si470x_device *radio)
353 radio->registers[POWERCFG] =
354 POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
355 retval = si470x_set_register(radio, POWERCFG);
360 radio->registers[SYSCONFIG1] =
361 (de << 11) & SYSCONFIG1_DE; /* DE*/
362 retval = si470x_set_register(radio, SYSCONFIG1);
367 radio->registers[SYSCONFIG2] =
368 (0x3f << 8) | /* SEEKTH */
369 ((band << 6) & SYSCONFIG2_BAND) | /* BAND */
370 ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
371 15; /* VOLUME (max) */
372 retval = si470x_set_register(radio, SYSCONFIG2);
376 /* reset last channel */
377 retval = si470x_set_chan(radio,
378 radio->registers[CHANNEL] & CHANNEL_CHAN);
386 * si470x_stop - switch off radio
388 int si470x_stop(struct si470x_device *radio)
393 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
394 retval = si470x_set_register(radio, SYSCONFIG1);
399 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
400 /* POWERCFG_ENABLE has to automatically go low */
401 radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
402 retval = si470x_set_register(radio, POWERCFG);
410 * si470x_rds_on - switch on rds reception
412 static int si470x_rds_on(struct si470x_device *radio)
417 radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
418 retval = si470x_set_register(radio, SYSCONFIG1);
420 radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
427 /**************************************************************************
428 * File Operations Interface
429 **************************************************************************/
432 * si470x_fops_read - read RDS data
434 static ssize_t si470x_fops_read(struct file *file, char __user *buf,
435 size_t count, loff_t *ppos)
437 struct si470x_device *radio = video_drvdata(file);
439 unsigned int block_count = 0;
441 /* switch on rds reception */
442 mutex_lock(&radio->lock);
443 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
444 si470x_rds_on(radio);
446 /* block if no new data available */
447 while (radio->wr_index == radio->rd_index) {
448 if (file->f_flags & O_NONBLOCK) {
449 retval = -EWOULDBLOCK;
452 if (wait_event_interruptible(radio->read_queue,
453 radio->wr_index != radio->rd_index) < 0) {
459 /* calculate block count from byte count */
462 /* copy RDS block out of internal buffer and to user buffer */
463 mutex_lock(&radio->lock);
464 while (block_count < count) {
465 if (radio->rd_index == radio->wr_index)
468 /* always transfer rds complete blocks */
469 if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
470 /* retval = -EFAULT; */
473 /* increment and wrap read pointer */
474 radio->rd_index += 3;
475 if (radio->rd_index >= radio->buf_size)
478 /* increment counters */
485 mutex_unlock(&radio->lock);
491 * si470x_fops_poll - poll RDS data
493 static unsigned int si470x_fops_poll(struct file *file,
494 struct poll_table_struct *pts)
496 struct si470x_device *radio = video_drvdata(file);
499 /* switch on rds reception */
501 mutex_lock(&radio->lock);
502 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
503 si470x_rds_on(radio);
504 mutex_unlock(&radio->lock);
506 poll_wait(file, &radio->read_queue, pts);
508 if (radio->rd_index != radio->wr_index)
509 retval = POLLIN | POLLRDNORM;
516 * si470x_fops - file operations interface
518 static const struct v4l2_file_operations si470x_fops = {
519 .owner = THIS_MODULE,
520 .read = si470x_fops_read,
521 .poll = si470x_fops_poll,
522 .unlocked_ioctl = video_ioctl2,
523 .open = si470x_fops_open,
524 .release = si470x_fops_release,
529 /**************************************************************************
530 * Video4Linux Interface
531 **************************************************************************/
534 * si470x_vidioc_queryctrl - enumerate control items
536 static int si470x_vidioc_queryctrl(struct file *file, void *priv,
537 struct v4l2_queryctrl *qc)
539 struct si470x_device *radio = video_drvdata(file);
540 int retval = -EINVAL;
542 /* abort if qc->id is below V4L2_CID_BASE */
543 if (qc->id < V4L2_CID_BASE)
546 /* search video control */
548 case V4L2_CID_AUDIO_VOLUME:
549 return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
550 case V4L2_CID_AUDIO_MUTE:
551 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
554 /* disable unsupported base controls */
555 /* to satisfy kradio and such apps */
556 if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
557 qc->flags = V4L2_CTRL_FLAG_DISABLED;
563 dev_warn(&radio->videodev->dev,
564 "query controls failed with %d\n", retval);
570 * si470x_vidioc_g_ctrl - get the value of a control
572 static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
573 struct v4l2_control *ctrl)
575 struct si470x_device *radio = video_drvdata(file);
578 mutex_lock(&radio->lock);
580 retval = si470x_disconnect_check(radio);
585 case V4L2_CID_AUDIO_VOLUME:
586 ctrl->value = radio->registers[SYSCONFIG2] &
589 case V4L2_CID_AUDIO_MUTE:
590 ctrl->value = ((radio->registers[POWERCFG] &
591 POWERCFG_DMUTE) == 0) ? 1 : 0;
599 dev_warn(&radio->videodev->dev,
600 "get control failed with %d\n", retval);
602 mutex_unlock(&radio->lock);
608 * si470x_vidioc_s_ctrl - set the value of a control
610 static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
611 struct v4l2_control *ctrl)
613 struct si470x_device *radio = video_drvdata(file);
616 mutex_lock(&radio->lock);
618 retval = si470x_disconnect_check(radio);
623 case V4L2_CID_AUDIO_VOLUME:
624 radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
625 radio->registers[SYSCONFIG2] |= ctrl->value;
626 retval = si470x_set_register(radio, SYSCONFIG2);
628 case V4L2_CID_AUDIO_MUTE:
629 if (ctrl->value == 1)
630 radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
632 radio->registers[POWERCFG] |= POWERCFG_DMUTE;
633 retval = si470x_set_register(radio, POWERCFG);
641 dev_warn(&radio->videodev->dev,
642 "set control failed with %d\n", retval);
643 mutex_unlock(&radio->lock);
649 * si470x_vidioc_g_audio - get audio attributes
651 static int si470x_vidioc_g_audio(struct file *file, void *priv,
652 struct v4l2_audio *audio)
654 /* driver constants */
656 strcpy(audio->name, "Radio");
657 audio->capability = V4L2_AUDCAP_STEREO;
665 * si470x_vidioc_g_tuner - get tuner attributes
667 static int si470x_vidioc_g_tuner(struct file *file, void *priv,
668 struct v4l2_tuner *tuner)
670 struct si470x_device *radio = video_drvdata(file);
673 mutex_lock(&radio->lock);
675 retval = si470x_disconnect_check(radio);
679 if (tuner->index != 0) {
684 retval = si470x_get_register(radio, STATUSRSSI);
688 /* driver constants */
689 strcpy(tuner->name, "FM");
690 tuner->type = V4L2_TUNER_RADIO;
691 tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
692 V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO;
695 switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
696 /* 0: 87.5 - 108 MHz (USA, Europe, default) */
698 tuner->rangelow = 87.5 * FREQ_MUL;
699 tuner->rangehigh = 108 * FREQ_MUL;
701 /* 1: 76 - 108 MHz (Japan wide band) */
703 tuner->rangelow = 76 * FREQ_MUL;
704 tuner->rangehigh = 108 * FREQ_MUL;
706 /* 2: 76 - 90 MHz (Japan) */
708 tuner->rangelow = 76 * FREQ_MUL;
709 tuner->rangehigh = 90 * FREQ_MUL;
713 /* stereo indicator == stereo (instead of mono) */
714 if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
715 tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
717 tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
718 /* If there is a reliable method of detecting an RDS channel,
719 then this code should check for that before setting this
721 tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
723 /* mono/stereo selector */
724 if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
725 tuner->audmode = V4L2_TUNER_MODE_STEREO;
727 tuner->audmode = V4L2_TUNER_MODE_MONO;
729 /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
730 /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
731 tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
732 /* the ideal factor is 0xffff/75 = 873,8 */
733 tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
735 /* automatic frequency control: -1: freq to low, 1 freq to high */
736 /* AFCRL does only indicate that freq. differs, not if too low/high */
737 tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
741 dev_warn(&radio->videodev->dev,
742 "get tuner failed with %d\n", retval);
743 mutex_unlock(&radio->lock);
749 * si470x_vidioc_s_tuner - set tuner attributes
751 static int si470x_vidioc_s_tuner(struct file *file, void *priv,
752 struct v4l2_tuner *tuner)
754 struct si470x_device *radio = video_drvdata(file);
757 mutex_lock(&radio->lock);
759 retval = si470x_disconnect_check(radio);
763 if (tuner->index != 0)
766 /* mono/stereo selector */
767 switch (tuner->audmode) {
768 case V4L2_TUNER_MODE_MONO:
769 radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
771 case V4L2_TUNER_MODE_STEREO:
772 radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
778 retval = si470x_set_register(radio, POWERCFG);
782 dev_warn(&radio->videodev->dev,
783 "set tuner failed with %d\n", retval);
784 mutex_unlock(&radio->lock);
790 * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
792 static int si470x_vidioc_g_frequency(struct file *file, void *priv,
793 struct v4l2_frequency *freq)
795 struct si470x_device *radio = video_drvdata(file);
799 mutex_lock(&radio->lock);
800 retval = si470x_disconnect_check(radio);
804 if (freq->tuner != 0) {
809 freq->type = V4L2_TUNER_RADIO;
810 retval = si470x_get_freq(radio, &freq->frequency);
814 dev_warn(&radio->videodev->dev,
815 "get frequency failed with %d\n", retval);
816 mutex_unlock(&radio->lock);
822 * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
824 static int si470x_vidioc_s_frequency(struct file *file, void *priv,
825 struct v4l2_frequency *freq)
827 struct si470x_device *radio = video_drvdata(file);
830 mutex_lock(&radio->lock);
832 retval = si470x_disconnect_check(radio);
836 if (freq->tuner != 0) {
841 retval = si470x_set_freq(radio, freq->frequency);
845 dev_warn(&radio->videodev->dev,
846 "set frequency failed with %d\n", retval);
847 mutex_unlock(&radio->lock);
853 * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
855 static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
856 struct v4l2_hw_freq_seek *seek)
858 struct si470x_device *radio = video_drvdata(file);
861 mutex_lock(&radio->lock);
863 retval = si470x_disconnect_check(radio);
867 if (seek->tuner != 0) {
872 retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
876 dev_warn(&radio->videodev->dev,
877 "set hardware frequency seek failed with %d\n", retval);
878 mutex_unlock(&radio->lock);
884 * si470x_ioctl_ops - video device ioctl operations
886 static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
887 .vidioc_querycap = si470x_vidioc_querycap,
888 .vidioc_queryctrl = si470x_vidioc_queryctrl,
889 .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
890 .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
891 .vidioc_g_audio = si470x_vidioc_g_audio,
892 .vidioc_g_tuner = si470x_vidioc_g_tuner,
893 .vidioc_s_tuner = si470x_vidioc_s_tuner,
894 .vidioc_g_frequency = si470x_vidioc_g_frequency,
895 .vidioc_s_frequency = si470x_vidioc_s_frequency,
896 .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
901 * si470x_viddev_template - video device interface
903 struct video_device si470x_viddev_template = {
904 .fops = &si470x_fops,
906 .release = video_device_release,
907 .ioctl_ops = &si470x_ioctl_ops,