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* 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>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - First working version
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* 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - Improved error handling, every function now returns errno
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* - Improved multi user access (start/mute/stop)
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* - Channel doesn't get lost anymore after start/mute/stop
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* - RDS support added (polling mode via interrupt EP 1)
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* - marked default module parameters with *value*
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* - switched from bit structs to bit masks
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* - header file cleaned and integrated
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* 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - hex values are now lower case
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* - commented USB ID for ADS/Tech moved on todo list
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* - blacklisted si470x in hid-quirks.c
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* - rds buffer handling functions integrated into *_work, *_read
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* - rds_command in si470x_poll exchanged against simple retval
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* - check for firmware version 15
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* - code order and prototypes still remain the same
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* - spacing and bottom of band codes remain the same
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* 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - code reordered to avoid function prototypes
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* - switch/case defaults are now more user-friendly
52
* - unified comment style
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* - applied all checkpatch.pl v1.12 suggestions
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* except the warning about the too long lines with bit comments
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* - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
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* 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - avoid poss. locking when doing copy_to_user which may sleep
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* - RDS is automatically activated on read now
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* - code cleaned of unnecessary rds_commands
61
* - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
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* (thanks to Guillaume RAMOUSSE)
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* 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - number of seek_retries changed to tune_timeout
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* - fixed problem with incomplete tune operations by own buffers
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* - optimization of variables and printf types
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* - improved error logging
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* 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Oliver Neukum <oliver@neukum.org>
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* - 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,
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* replaced by delayed_work
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* - racy interruptible_sleep_on(),
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* replaced with wait_event_interruptible()
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* - handle signals in read()
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* 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Oliver Neukum <oliver@neukum.org>
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* - usb autosuspend support
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* 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
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* - hardware frequency seek support
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* - more safety checks, let si470x_get_freq return errno
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* - vidioc behavior corrected according to v4l2 spec
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* 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
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* - add support for KWorld USB FM Radio FM700
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* - blacklisted KWorld radio in hid-core.c and hid-ids.h
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* 2008-12-03 Mark Lord <mlord@pobox.com>
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* - add support for DealExtreme USB Radio
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* 2009-01-31 Bob Ross <pigiron@gmx.com>
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* - correction of stereo detection/setting
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* - correction of signal strength indicator scaling
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* 2009-01-31 Rick Bronson <rick@efn.org>
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* Tobias Lorenz <tobias.lorenz@gmx.net>
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* - add LED status output
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* - get HW/SW version from scratchpad
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* 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
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* - add support for interrupt mode for RDS endpoint,
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* instead of polling.
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* Improves RDS reception significantly
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/* kernel includes */
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#include "radio-si470x.h"
118
/**************************************************************************
120
**************************************************************************/
123
/* 0: 200 kHz (USA, Australia) */
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/* 1: 100 kHz (Europe, Japan) */
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static unsigned short space = 2;
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module_param(space, ushort, 0444);
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MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
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/* Bottom of Band (MHz) */
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/* 0: 87.5 - 108 MHz (USA, Europe)*/
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/* 1: 76 - 108 MHz (Japan wide band) */
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/* 2: 76 - 90 MHz (Japan) */
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static unsigned short band = 1;
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module_param(band, ushort, 0444);
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MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
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/* 1: 50 us (Europe, Australia, Japan) */
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static unsigned short de = 1;
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module_param(de, ushort, 0444);
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MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
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static unsigned int tune_timeout = 3000;
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module_param(tune_timeout, uint, 0644);
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MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
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static unsigned int seek_timeout = 5000;
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module_param(seek_timeout, uint, 0644);
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MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
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/**************************************************************************
159
**************************************************************************/
162
* si470x_set_chan - set the channel
164
static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
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unsigned long timeout;
171
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
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radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
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retval = si470x_set_register(radio, CHANNEL);
177
/* currently I2C driver only uses interrupt way to tune */
178
if (radio->stci_enabled) {
179
INIT_COMPLETION(radio->completion);
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/* wait till tune operation has completed */
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retval = wait_for_completion_timeout(&radio->completion,
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msecs_to_jiffies(tune_timeout));
187
/* wait till tune operation has completed */
188
timeout = jiffies + msecs_to_jiffies(tune_timeout);
190
retval = si470x_get_register(radio, STATUSRSSI);
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timed_out = time_after(jiffies, timeout);
194
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
198
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
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dev_warn(&radio->videodev->dev, "tune does not complete\n");
201
dev_warn(&radio->videodev->dev,
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"tune timed out after %u ms\n", tune_timeout);
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radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
207
retval = si470x_set_register(radio, CHANNEL);
215
* si470x_get_freq - get the frequency
217
static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
219
unsigned int spacing, band_bottom;
224
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
225
/* 0: 200 kHz (USA, Australia) */
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spacing = 0.200 * FREQ_MUL; break;
228
/* 1: 100 kHz (Europe, Japan) */
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spacing = 0.100 * FREQ_MUL; break;
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spacing = 0.050 * FREQ_MUL; break;
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/* Bottom of Band (MHz) */
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switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
238
/* 0: 87.5 - 108 MHz (USA, Europe) */
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band_bottom = 87.5 * FREQ_MUL; break;
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/* 1: 76 - 108 MHz (Japan wide band) */
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band_bottom = 76 * FREQ_MUL; break;
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/* 2: 76 - 90 MHz (Japan) */
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band_bottom = 76 * FREQ_MUL; break;
250
retval = si470x_get_register(radio, READCHAN);
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chan = radio->registers[READCHAN] & READCHAN_READCHAN;
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/* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
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*freq = chan * spacing + band_bottom;
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* si470x_set_freq - set the frequency
263
int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
265
unsigned int spacing, band_bottom;
269
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
270
/* 0: 200 kHz (USA, Australia) */
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spacing = 0.200 * FREQ_MUL; break;
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/* 1: 100 kHz (Europe, Japan) */
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spacing = 0.100 * FREQ_MUL; break;
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spacing = 0.050 * FREQ_MUL; break;
281
/* Bottom of Band (MHz) */
282
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
283
/* 0: 87.5 - 108 MHz (USA, Europe) */
285
band_bottom = 87.5 * FREQ_MUL; break;
286
/* 1: 76 - 108 MHz (Japan wide band) */
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band_bottom = 76 * FREQ_MUL; break;
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/* 2: 76 - 90 MHz (Japan) */
291
band_bottom = 76 * FREQ_MUL; break;
294
/* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
295
chan = (freq - band_bottom) / spacing;
297
return si470x_set_chan(radio, chan);
302
* si470x_set_seek - set seek
304
static int si470x_set_seek(struct si470x_device *radio,
305
unsigned int wrap_around, unsigned int seek_upward)
308
unsigned long timeout;
312
radio->registers[POWERCFG] |= POWERCFG_SEEK;
313
if (wrap_around == 1)
314
radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
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radio->registers[POWERCFG] |= POWERCFG_SKMODE;
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if (seek_upward == 1)
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radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
320
radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
321
retval = si470x_set_register(radio, POWERCFG);
325
/* currently I2C driver only uses interrupt way to seek */
326
if (radio->stci_enabled) {
327
INIT_COMPLETION(radio->completion);
329
/* wait till seek operation has completed */
330
retval = wait_for_completion_timeout(&radio->completion,
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msecs_to_jiffies(seek_timeout));
335
/* wait till seek operation has completed */
336
timeout = jiffies + msecs_to_jiffies(seek_timeout);
338
retval = si470x_get_register(radio, STATUSRSSI);
341
timed_out = time_after(jiffies, timeout);
342
} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
346
if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
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dev_warn(&radio->videodev->dev, "seek does not complete\n");
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if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
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dev_warn(&radio->videodev->dev,
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"seek failed / band limit reached\n");
352
dev_warn(&radio->videodev->dev,
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"seek timed out after %u ms\n", seek_timeout);
357
radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
358
retval = si470x_set_register(radio, POWERCFG);
361
/* try again, if timed out */
362
if ((retval == 0) && timed_out)
370
* si470x_start - switch on radio
372
int si470x_start(struct si470x_device *radio)
377
radio->registers[POWERCFG] =
378
POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
379
retval = si470x_set_register(radio, POWERCFG);
384
radio->registers[SYSCONFIG1] =
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(de << 11) & SYSCONFIG1_DE; /* DE*/
386
retval = si470x_set_register(radio, SYSCONFIG1);
391
radio->registers[SYSCONFIG2] =
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(0x3f << 8) | /* SEEKTH */
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((band << 6) & SYSCONFIG2_BAND) | /* BAND */
394
((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
395
15; /* VOLUME (max) */
396
retval = si470x_set_register(radio, SYSCONFIG2);
400
/* reset last channel */
401
retval = si470x_set_chan(radio,
402
radio->registers[CHANNEL] & CHANNEL_CHAN);
410
* si470x_stop - switch off radio
412
int si470x_stop(struct si470x_device *radio)
417
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
418
retval = si470x_set_register(radio, SYSCONFIG1);
423
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
424
/* POWERCFG_ENABLE has to automatically go low */
425
radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
426
retval = si470x_set_register(radio, POWERCFG);
434
* si470x_rds_on - switch on rds reception
436
static int si470x_rds_on(struct si470x_device *radio)
441
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
442
retval = si470x_set_register(radio, SYSCONFIG1);
444
radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
451
/**************************************************************************
452
* File Operations Interface
453
**************************************************************************/
456
* si470x_fops_read - read RDS data
458
static ssize_t si470x_fops_read(struct file *file, char __user *buf,
459
size_t count, loff_t *ppos)
461
struct si470x_device *radio = video_drvdata(file);
463
unsigned int block_count = 0;
465
/* switch on rds reception */
466
mutex_lock(&radio->lock);
467
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
468
si470x_rds_on(radio);
470
/* block if no new data available */
471
while (radio->wr_index == radio->rd_index) {
472
if (file->f_flags & O_NONBLOCK) {
473
retval = -EWOULDBLOCK;
476
if (wait_event_interruptible(radio->read_queue,
477
radio->wr_index != radio->rd_index) < 0) {
483
/* calculate block count from byte count */
486
/* copy RDS block out of internal buffer and to user buffer */
487
while (block_count < count) {
488
if (radio->rd_index == radio->wr_index)
491
/* always transfer rds complete blocks */
492
if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
493
/* retval = -EFAULT; */
496
/* increment and wrap read pointer */
497
radio->rd_index += 3;
498
if (radio->rd_index >= radio->buf_size)
501
/* increment counters */
508
mutex_unlock(&radio->lock);
514
* si470x_fops_poll - poll RDS data
516
static unsigned int si470x_fops_poll(struct file *file,
517
struct poll_table_struct *pts)
519
struct si470x_device *radio = video_drvdata(file);
522
/* switch on rds reception */
524
mutex_lock(&radio->lock);
525
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
526
si470x_rds_on(radio);
527
mutex_unlock(&radio->lock);
529
poll_wait(file, &radio->read_queue, pts);
531
if (radio->rd_index != radio->wr_index)
532
retval = POLLIN | POLLRDNORM;
539
* si470x_fops - file operations interface
541
static const struct v4l2_file_operations si470x_fops = {
542
.owner = THIS_MODULE,
543
.read = si470x_fops_read,
544
.poll = si470x_fops_poll,
545
.unlocked_ioctl = video_ioctl2,
546
.open = si470x_fops_open,
547
.release = si470x_fops_release,
552
/**************************************************************************
553
* Video4Linux Interface
554
**************************************************************************/
557
* si470x_vidioc_queryctrl - enumerate control items
559
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
560
struct v4l2_queryctrl *qc)
562
struct si470x_device *radio = video_drvdata(file);
563
int retval = -EINVAL;
565
/* abort if qc->id is below V4L2_CID_BASE */
566
if (qc->id < V4L2_CID_BASE)
569
/* search video control */
571
case V4L2_CID_AUDIO_VOLUME:
572
return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15);
573
case V4L2_CID_AUDIO_MUTE:
574
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
577
/* disable unsupported base controls */
578
/* to satisfy kradio and such apps */
579
if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) {
580
qc->flags = V4L2_CTRL_FLAG_DISABLED;
586
dev_warn(&radio->videodev->dev,
587
"query controls failed with %d\n", retval);
593
* si470x_vidioc_g_ctrl - get the value of a control
595
static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
596
struct v4l2_control *ctrl)
598
struct si470x_device *radio = video_drvdata(file);
601
mutex_lock(&radio->lock);
603
retval = si470x_disconnect_check(radio);
608
case V4L2_CID_AUDIO_VOLUME:
609
ctrl->value = radio->registers[SYSCONFIG2] &
612
case V4L2_CID_AUDIO_MUTE:
613
ctrl->value = ((radio->registers[POWERCFG] &
614
POWERCFG_DMUTE) == 0) ? 1 : 0;
622
dev_warn(&radio->videodev->dev,
623
"get control failed with %d\n", retval);
625
mutex_unlock(&radio->lock);
631
* si470x_vidioc_s_ctrl - set the value of a control
633
static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
634
struct v4l2_control *ctrl)
636
struct si470x_device *radio = video_drvdata(file);
639
mutex_lock(&radio->lock);
641
retval = si470x_disconnect_check(radio);
646
case V4L2_CID_AUDIO_VOLUME:
647
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
648
radio->registers[SYSCONFIG2] |= ctrl->value;
649
retval = si470x_set_register(radio, SYSCONFIG2);
651
case V4L2_CID_AUDIO_MUTE:
652
if (ctrl->value == 1)
653
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
655
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
656
retval = si470x_set_register(radio, POWERCFG);
664
dev_warn(&radio->videodev->dev,
665
"set control failed with %d\n", retval);
666
mutex_unlock(&radio->lock);
672
* si470x_vidioc_g_audio - get audio attributes
674
static int si470x_vidioc_g_audio(struct file *file, void *priv,
675
struct v4l2_audio *audio)
677
/* driver constants */
679
strcpy(audio->name, "Radio");
680
audio->capability = V4L2_AUDCAP_STEREO;
688
* si470x_vidioc_g_tuner - get tuner attributes
690
static int si470x_vidioc_g_tuner(struct file *file, void *priv,
691
struct v4l2_tuner *tuner)
693
struct si470x_device *radio = video_drvdata(file);
696
mutex_lock(&radio->lock);
698
retval = si470x_disconnect_check(radio);
702
if (tuner->index != 0) {
707
retval = si470x_get_register(radio, STATUSRSSI);
711
/* driver constants */
712
strcpy(tuner->name, "FM");
713
tuner->type = V4L2_TUNER_RADIO;
714
tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
715
V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO;
718
switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) {
719
/* 0: 87.5 - 108 MHz (USA, Europe, default) */
721
tuner->rangelow = 87.5 * FREQ_MUL;
722
tuner->rangehigh = 108 * FREQ_MUL;
724
/* 1: 76 - 108 MHz (Japan wide band) */
726
tuner->rangelow = 76 * FREQ_MUL;
727
tuner->rangehigh = 108 * FREQ_MUL;
729
/* 2: 76 - 90 MHz (Japan) */
731
tuner->rangelow = 76 * FREQ_MUL;
732
tuner->rangehigh = 90 * FREQ_MUL;
736
/* stereo indicator == stereo (instead of mono) */
737
if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
738
tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
740
tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
741
/* If there is a reliable method of detecting an RDS channel,
742
then this code should check for that before setting this
744
tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
746
/* mono/stereo selector */
747
if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
748
tuner->audmode = V4L2_TUNER_MODE_STEREO;
750
tuner->audmode = V4L2_TUNER_MODE_MONO;
752
/* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
753
/* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
754
tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
755
/* the ideal factor is 0xffff/75 = 873,8 */
756
tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
758
/* automatic frequency control: -1: freq to low, 1 freq to high */
759
/* AFCRL does only indicate that freq. differs, not if too low/high */
760
tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
764
dev_warn(&radio->videodev->dev,
765
"get tuner failed with %d\n", retval);
766
mutex_unlock(&radio->lock);
772
* si470x_vidioc_s_tuner - set tuner attributes
774
static int si470x_vidioc_s_tuner(struct file *file, void *priv,
775
struct v4l2_tuner *tuner)
777
struct si470x_device *radio = video_drvdata(file);
780
mutex_lock(&radio->lock);
782
retval = si470x_disconnect_check(radio);
786
if (tuner->index != 0)
789
/* mono/stereo selector */
790
switch (tuner->audmode) {
791
case V4L2_TUNER_MODE_MONO:
792
radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
794
case V4L2_TUNER_MODE_STEREO:
795
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
801
retval = si470x_set_register(radio, POWERCFG);
805
dev_warn(&radio->videodev->dev,
806
"set tuner failed with %d\n", retval);
807
mutex_unlock(&radio->lock);
813
* si470x_vidioc_g_frequency - get tuner or modulator radio frequency
815
static int si470x_vidioc_g_frequency(struct file *file, void *priv,
816
struct v4l2_frequency *freq)
818
struct si470x_device *radio = video_drvdata(file);
822
mutex_lock(&radio->lock);
823
retval = si470x_disconnect_check(radio);
827
if (freq->tuner != 0) {
832
freq->type = V4L2_TUNER_RADIO;
833
retval = si470x_get_freq(radio, &freq->frequency);
837
dev_warn(&radio->videodev->dev,
838
"get frequency failed with %d\n", retval);
839
mutex_unlock(&radio->lock);
845
* si470x_vidioc_s_frequency - set tuner or modulator radio frequency
847
static int si470x_vidioc_s_frequency(struct file *file, void *priv,
848
struct v4l2_frequency *freq)
850
struct si470x_device *radio = video_drvdata(file);
853
mutex_lock(&radio->lock);
855
retval = si470x_disconnect_check(radio);
859
if (freq->tuner != 0) {
864
retval = si470x_set_freq(radio, freq->frequency);
868
dev_warn(&radio->videodev->dev,
869
"set frequency failed with %d\n", retval);
870
mutex_unlock(&radio->lock);
876
* si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
878
static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
879
struct v4l2_hw_freq_seek *seek)
881
struct si470x_device *radio = video_drvdata(file);
884
mutex_lock(&radio->lock);
886
retval = si470x_disconnect_check(radio);
890
if (seek->tuner != 0) {
895
retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward);
899
dev_warn(&radio->videodev->dev,
900
"set hardware frequency seek failed with %d\n", retval);
901
mutex_unlock(&radio->lock);
907
* si470x_ioctl_ops - video device ioctl operations
909
static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
910
.vidioc_querycap = si470x_vidioc_querycap,
911
.vidioc_queryctrl = si470x_vidioc_queryctrl,
912
.vidioc_g_ctrl = si470x_vidioc_g_ctrl,
913
.vidioc_s_ctrl = si470x_vidioc_s_ctrl,
914
.vidioc_g_audio = si470x_vidioc_g_audio,
915
.vidioc_g_tuner = si470x_vidioc_g_tuner,
916
.vidioc_s_tuner = si470x_vidioc_s_tuner,
917
.vidioc_g_frequency = si470x_vidioc_g_frequency,
918
.vidioc_s_frequency = si470x_vidioc_s_frequency,
919
.vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
924
* si470x_viddev_template - video device interface
926
struct video_device si470x_viddev_template = {
927
.fops = &si470x_fops,
929
.release = video_device_release,
930
.ioctl_ops = &si470x_ioctl_ops,