1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
2b09cd163SJoonyoung Shim /*
3b09cd163SJoonyoung Shim * drivers/media/radio/si470x/radio-si470x-common.c
4b09cd163SJoonyoung Shim *
5b09cd163SJoonyoung Shim * Driver for radios with Silicon Labs Si470x FM Radio Receivers
6b09cd163SJoonyoung Shim *
7b09cd163SJoonyoung Shim * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net>
8f140612dSHans de Goede * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
9b09cd163SJoonyoung Shim */
10b09cd163SJoonyoung Shim
11b09cd163SJoonyoung Shim
12b09cd163SJoonyoung Shim /*
13b09cd163SJoonyoung Shim * History:
14b09cd163SJoonyoung Shim * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
15b09cd163SJoonyoung Shim * Version 1.0.0
16b09cd163SJoonyoung Shim * - First working version
17b09cd163SJoonyoung Shim * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
18b09cd163SJoonyoung Shim * Version 1.0.1
19b09cd163SJoonyoung Shim * - Improved error handling, every function now returns errno
20b09cd163SJoonyoung Shim * - Improved multi user access (start/mute/stop)
21b09cd163SJoonyoung Shim * - Channel doesn't get lost anymore after start/mute/stop
22b09cd163SJoonyoung Shim * - RDS support added (polling mode via interrupt EP 1)
23b09cd163SJoonyoung Shim * - marked default module parameters with *value*
24b09cd163SJoonyoung Shim * - switched from bit structs to bit masks
25b09cd163SJoonyoung Shim * - header file cleaned and integrated
26b09cd163SJoonyoung Shim * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
27b09cd163SJoonyoung Shim * Version 1.0.2
28b09cd163SJoonyoung Shim * - hex values are now lower case
29b09cd163SJoonyoung Shim * - commented USB ID for ADS/Tech moved on todo list
30b09cd163SJoonyoung Shim * - blacklisted si470x in hid-quirks.c
31b09cd163SJoonyoung Shim * - rds buffer handling functions integrated into *_work, *_read
32b09cd163SJoonyoung Shim * - rds_command in si470x_poll exchanged against simple retval
33b09cd163SJoonyoung Shim * - check for firmware version 15
34b09cd163SJoonyoung Shim * - code order and prototypes still remain the same
35b09cd163SJoonyoung Shim * - spacing and bottom of band codes remain the same
36b09cd163SJoonyoung Shim * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net>
37b09cd163SJoonyoung Shim * Version 1.0.3
38b09cd163SJoonyoung Shim * - code reordered to avoid function prototypes
39b09cd163SJoonyoung Shim * - switch/case defaults are now more user-friendly
40b09cd163SJoonyoung Shim * - unified comment style
41b09cd163SJoonyoung Shim * - applied all checkpatch.pl v1.12 suggestions
42b09cd163SJoonyoung Shim * except the warning about the too long lines with bit comments
43b09cd163SJoonyoung Shim * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl)
44b09cd163SJoonyoung Shim * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net>
45b09cd163SJoonyoung Shim * Version 1.0.4
46b09cd163SJoonyoung Shim * - avoid poss. locking when doing copy_to_user which may sleep
47b09cd163SJoonyoung Shim * - RDS is automatically activated on read now
48b09cd163SJoonyoung Shim * - code cleaned of unnecessary rds_commands
49b09cd163SJoonyoung Shim * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
50b09cd163SJoonyoung Shim * (thanks to Guillaume RAMOUSSE)
51b09cd163SJoonyoung Shim * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
52b09cd163SJoonyoung Shim * Version 1.0.5
53b09cd163SJoonyoung Shim * - number of seek_retries changed to tune_timeout
54b09cd163SJoonyoung Shim * - fixed problem with incomplete tune operations by own buffers
55b09cd163SJoonyoung Shim * - optimization of variables and printf types
56b09cd163SJoonyoung Shim * - improved error logging
57b09cd163SJoonyoung Shim * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net>
58b09cd163SJoonyoung Shim * Oliver Neukum <oliver@neukum.org>
59b09cd163SJoonyoung Shim * Version 1.0.6
60b09cd163SJoonyoung Shim * - fixed coverity checker warnings in *_usb_driver_disconnect
61b09cd163SJoonyoung Shim * - probe()/open() race by correct ordering in probe()
62b09cd163SJoonyoung Shim * - DMA coherency rules by separate allocation of all buffers
63b09cd163SJoonyoung Shim * - use of endianness macros
64b09cd163SJoonyoung Shim * - abuse of spinlock, replaced by mutex
65b09cd163SJoonyoung Shim * - racy handling of timer in disconnect,
66b09cd163SJoonyoung Shim * replaced by delayed_work
67b09cd163SJoonyoung Shim * - racy interruptible_sleep_on(),
68b09cd163SJoonyoung Shim * replaced with wait_event_interruptible()
69b09cd163SJoonyoung Shim * - handle signals in read()
70b09cd163SJoonyoung Shim * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
71b09cd163SJoonyoung Shim * Oliver Neukum <oliver@neukum.org>
72b09cd163SJoonyoung Shim * Version 1.0.7
73b09cd163SJoonyoung Shim * - usb autosuspend support
74b09cd163SJoonyoung Shim * - unplugging fixed
75b09cd163SJoonyoung Shim * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net>
76b09cd163SJoonyoung Shim * Version 1.0.8
77b09cd163SJoonyoung Shim * - hardware frequency seek support
78b09cd163SJoonyoung Shim * - afc indication
79b09cd163SJoonyoung Shim * - more safety checks, let si470x_get_freq return errno
80b09cd163SJoonyoung Shim * - vidioc behavior corrected according to v4l2 spec
81b09cd163SJoonyoung Shim * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com>
82b09cd163SJoonyoung Shim * - add support for KWorld USB FM Radio FM700
83b09cd163SJoonyoung Shim * - blacklisted KWorld radio in hid-core.c and hid-ids.h
84b09cd163SJoonyoung Shim * 2008-12-03 Mark Lord <mlord@pobox.com>
85b09cd163SJoonyoung Shim * - add support for DealExtreme USB Radio
86b09cd163SJoonyoung Shim * 2009-01-31 Bob Ross <pigiron@gmx.com>
87b09cd163SJoonyoung Shim * - correction of stereo detection/setting
88b09cd163SJoonyoung Shim * - correction of signal strength indicator scaling
89b09cd163SJoonyoung Shim * 2009-01-31 Rick Bronson <rick@efn.org>
90b09cd163SJoonyoung Shim * Tobias Lorenz <tobias.lorenz@gmx.net>
91b09cd163SJoonyoung Shim * - add LED status output
92b09cd163SJoonyoung Shim * - get HW/SW version from scratchpad
93b09cd163SJoonyoung Shim * 2009-06-16 Edouard Lafargue <edouard@lafargue.name>
94b09cd163SJoonyoung Shim * Version 1.0.10
95b09cd163SJoonyoung Shim * - add support for interrupt mode for RDS endpoint,
96b09cd163SJoonyoung Shim * instead of polling.
97b09cd163SJoonyoung Shim * Improves RDS reception significantly
98b09cd163SJoonyoung Shim */
99b09cd163SJoonyoung Shim
100b09cd163SJoonyoung Shim
101b09cd163SJoonyoung Shim /* kernel includes */
102b09cd163SJoonyoung Shim #include "radio-si470x.h"
103b09cd163SJoonyoung Shim
104b09cd163SJoonyoung Shim /**************************************************************************
105b09cd163SJoonyoung Shim * Module Parameters
106b09cd163SJoonyoung Shim **************************************************************************/
107b09cd163SJoonyoung Shim
108b09cd163SJoonyoung Shim /* Spacing (kHz) */
109b09cd163SJoonyoung Shim /* 0: 200 kHz (USA, Australia) */
110b09cd163SJoonyoung Shim /* 1: 100 kHz (Europe, Japan) */
111b09cd163SJoonyoung Shim /* 2: 50 kHz */
112b09cd163SJoonyoung Shim static unsigned short space = 2;
113b09cd163SJoonyoung Shim module_param(space, ushort, 0444);
114b09cd163SJoonyoung Shim MODULE_PARM_DESC(space, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
115b09cd163SJoonyoung Shim
116b09cd163SJoonyoung Shim /* De-emphasis */
117b09cd163SJoonyoung Shim /* 0: 75 us (USA) */
118b09cd163SJoonyoung Shim /* 1: 50 us (Europe, Australia, Japan) */
119b09cd163SJoonyoung Shim static unsigned short de = 1;
120b09cd163SJoonyoung Shim module_param(de, ushort, 0444);
121b09cd163SJoonyoung Shim MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*");
122b09cd163SJoonyoung Shim
123b09cd163SJoonyoung Shim /* Tune timeout */
124b09cd163SJoonyoung Shim static unsigned int tune_timeout = 3000;
125b09cd163SJoonyoung Shim module_param(tune_timeout, uint, 0644);
126b09cd163SJoonyoung Shim MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
127b09cd163SJoonyoung Shim
128b09cd163SJoonyoung Shim /* Seek timeout */
129b09cd163SJoonyoung Shim static unsigned int seek_timeout = 5000;
130b09cd163SJoonyoung Shim module_param(seek_timeout, uint, 0644);
131b09cd163SJoonyoung Shim MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*");
132b09cd163SJoonyoung Shim
133f140612dSHans de Goede static const struct v4l2_frequency_band bands[] = {
134f140612dSHans de Goede {
135f140612dSHans de Goede .type = V4L2_TUNER_RADIO,
136f140612dSHans de Goede .index = 0,
137f140612dSHans de Goede .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
138f140612dSHans de Goede V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
13932737810SHans Verkuil V4L2_TUNER_CAP_FREQ_BANDS |
140f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_BOUNDED |
141f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_WRAP,
142f140612dSHans de Goede .rangelow = 87500 * 16,
143f140612dSHans de Goede .rangehigh = 108000 * 16,
144f140612dSHans de Goede .modulation = V4L2_BAND_MODULATION_FM,
145f140612dSHans de Goede },
146f140612dSHans de Goede {
147f140612dSHans de Goede .type = V4L2_TUNER_RADIO,
148f140612dSHans de Goede .index = 1,
149f140612dSHans de Goede .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
150f140612dSHans de Goede V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
15132737810SHans Verkuil V4L2_TUNER_CAP_FREQ_BANDS |
152f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_BOUNDED |
153f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_WRAP,
154f140612dSHans de Goede .rangelow = 76000 * 16,
155f140612dSHans de Goede .rangehigh = 108000 * 16,
156f140612dSHans de Goede .modulation = V4L2_BAND_MODULATION_FM,
157f140612dSHans de Goede },
158f140612dSHans de Goede {
159f140612dSHans de Goede .type = V4L2_TUNER_RADIO,
160f140612dSHans de Goede .index = 2,
161f140612dSHans de Goede .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
162f140612dSHans de Goede V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
16332737810SHans Verkuil V4L2_TUNER_CAP_FREQ_BANDS |
164f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_BOUNDED |
165f140612dSHans de Goede V4L2_TUNER_CAP_HWSEEK_WRAP,
166f140612dSHans de Goede .rangelow = 76000 * 16,
167f140612dSHans de Goede .rangehigh = 90000 * 16,
168f140612dSHans de Goede .modulation = V4L2_BAND_MODULATION_FM,
169f140612dSHans de Goede },
170f140612dSHans de Goede };
171b09cd163SJoonyoung Shim
172b09cd163SJoonyoung Shim /**************************************************************************
173b09cd163SJoonyoung Shim * Generic Functions
174b09cd163SJoonyoung Shim **************************************************************************/
175b09cd163SJoonyoung Shim
176b09cd163SJoonyoung Shim /*
177f140612dSHans de Goede * si470x_set_band - set the band
178f140612dSHans de Goede */
si470x_set_band(struct si470x_device * radio,int band)179f140612dSHans de Goede static int si470x_set_band(struct si470x_device *radio, int band)
180f140612dSHans de Goede {
181f140612dSHans de Goede if (radio->band == band)
182f140612dSHans de Goede return 0;
183f140612dSHans de Goede
184f140612dSHans de Goede radio->band = band;
185f140612dSHans de Goede radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_BAND;
186f140612dSHans de Goede radio->registers[SYSCONFIG2] |= radio->band << 6;
18758757984SMauro Carvalho Chehab return radio->set_register(radio, SYSCONFIG2);
188f140612dSHans de Goede }
189f140612dSHans de Goede
190f140612dSHans de Goede /*
191b09cd163SJoonyoung Shim * si470x_set_chan - set the channel
192b09cd163SJoonyoung Shim */
si470x_set_chan(struct si470x_device * radio,unsigned short chan)193b09cd163SJoonyoung Shim static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
194b09cd163SJoonyoung Shim {
195b09cd163SJoonyoung Shim int retval;
19661765a50SNicholas Mc Guire unsigned long time_left;
1978b4b6818SMauro Carvalho Chehab bool timed_out = false;
198b09cd163SJoonyoung Shim
19958757984SMauro Carvalho Chehab retval = radio->get_register(radio, POWERCFG);
20036d6bf89SDouglas Fischer if (retval)
20136d6bf89SDouglas Fischer return retval;
20236d6bf89SDouglas Fischer
20336d6bf89SDouglas Fischer if ((radio->registers[POWERCFG] & (POWERCFG_ENABLE|POWERCFG_DMUTE))
20436d6bf89SDouglas Fischer != (POWERCFG_ENABLE|POWERCFG_DMUTE)) {
20536d6bf89SDouglas Fischer return 0;
20636d6bf89SDouglas Fischer }
20736d6bf89SDouglas Fischer
208b09cd163SJoonyoung Shim /* start tuning */
209b09cd163SJoonyoung Shim radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
210b09cd163SJoonyoung Shim radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
21158757984SMauro Carvalho Chehab retval = radio->set_register(radio, CHANNEL);
212b09cd163SJoonyoung Shim if (retval < 0)
213b09cd163SJoonyoung Shim goto done;
214b09cd163SJoonyoung Shim
2150830be3fSJoonyoung Shim /* wait till tune operation has completed */
21616735d02SWolfram Sang reinit_completion(&radio->completion);
21761765a50SNicholas Mc Guire time_left = wait_for_completion_timeout(&radio->completion,
2180830be3fSJoonyoung Shim msecs_to_jiffies(tune_timeout));
21961765a50SNicholas Mc Guire if (time_left == 0)
2200830be3fSJoonyoung Shim timed_out = true;
2210830be3fSJoonyoung Shim
222b09cd163SJoonyoung Shim if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
2234967d53dSHans Verkuil dev_warn(&radio->videodev.dev, "tune does not complete\n");
224b09cd163SJoonyoung Shim if (timed_out)
2254967d53dSHans Verkuil dev_warn(&radio->videodev.dev,
226a9d6fd5eSJoonyoung Shim "tune timed out after %u ms\n", tune_timeout);
227b09cd163SJoonyoung Shim
228b09cd163SJoonyoung Shim /* stop tuning */
229b09cd163SJoonyoung Shim radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
23058757984SMauro Carvalho Chehab retval = radio->set_register(radio, CHANNEL);
231b09cd163SJoonyoung Shim
232b09cd163SJoonyoung Shim done:
233b09cd163SJoonyoung Shim return retval;
234b09cd163SJoonyoung Shim }
235b09cd163SJoonyoung Shim
236f140612dSHans de Goede /*
237f140612dSHans de Goede * si470x_get_step - get channel spacing
238f140612dSHans de Goede */
si470x_get_step(struct si470x_device * radio)239f140612dSHans de Goede static unsigned int si470x_get_step(struct si470x_device *radio)
240f140612dSHans de Goede {
241f140612dSHans de Goede /* Spacing (kHz) */
242f140612dSHans de Goede switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
243f140612dSHans de Goede /* 0: 200 kHz (USA, Australia) */
244f140612dSHans de Goede case 0:
245f140612dSHans de Goede return 200 * 16;
246f140612dSHans de Goede /* 1: 100 kHz (Europe, Japan) */
247f140612dSHans de Goede case 1:
248f140612dSHans de Goede return 100 * 16;
249f140612dSHans de Goede /* 2: 50 kHz */
250f140612dSHans de Goede default:
251f140612dSHans de Goede return 50 * 16;
2522028c71dSJoe Perches }
253f140612dSHans de Goede }
254f140612dSHans de Goede
255b09cd163SJoonyoung Shim
256b09cd163SJoonyoung Shim /*
257b09cd163SJoonyoung Shim * si470x_get_freq - get the frequency
258b09cd163SJoonyoung Shim */
si470x_get_freq(struct si470x_device * radio,unsigned int * freq)259b09cd163SJoonyoung Shim static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq)
260b09cd163SJoonyoung Shim {
261f140612dSHans de Goede int chan, retval;
262b09cd163SJoonyoung Shim
263b09cd163SJoonyoung Shim /* read channel */
26458757984SMauro Carvalho Chehab retval = radio->get_register(radio, READCHAN);
265b09cd163SJoonyoung Shim chan = radio->registers[READCHAN] & READCHAN_READCHAN;
266b09cd163SJoonyoung Shim
267b09cd163SJoonyoung Shim /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
268f140612dSHans de Goede *freq = chan * si470x_get_step(radio) + bands[radio->band].rangelow;
269b09cd163SJoonyoung Shim
270b09cd163SJoonyoung Shim return retval;
271b09cd163SJoonyoung Shim }
272b09cd163SJoonyoung Shim
273b09cd163SJoonyoung Shim
274b09cd163SJoonyoung Shim /*
275b09cd163SJoonyoung Shim * si470x_set_freq - set the frequency
276b09cd163SJoonyoung Shim */
si470x_set_freq(struct si470x_device * radio,unsigned int freq)277b09cd163SJoonyoung Shim int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
278b09cd163SJoonyoung Shim {
279b09cd163SJoonyoung Shim unsigned short chan;
280b09cd163SJoonyoung Shim
281f140612dSHans de Goede freq = clamp(freq, bands[radio->band].rangelow,
282f140612dSHans de Goede bands[radio->band].rangehigh);
283b09cd163SJoonyoung Shim /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
284f140612dSHans de Goede chan = (freq - bands[radio->band].rangelow) / si470x_get_step(radio);
285b09cd163SJoonyoung Shim
286b09cd163SJoonyoung Shim return si470x_set_chan(radio, chan);
287b09cd163SJoonyoung Shim }
28858757984SMauro Carvalho Chehab EXPORT_SYMBOL_GPL(si470x_set_freq);
289b09cd163SJoonyoung Shim
290b09cd163SJoonyoung Shim
291b09cd163SJoonyoung Shim /*
292b09cd163SJoonyoung Shim * si470x_set_seek - set seek
293b09cd163SJoonyoung Shim */
si470x_set_seek(struct si470x_device * radio,const struct v4l2_hw_freq_seek * seek)294b09cd163SJoonyoung Shim static int si470x_set_seek(struct si470x_device *radio,
295ec6f4328SHans Verkuil const struct v4l2_hw_freq_seek *seek)
296b09cd163SJoonyoung Shim {
297f140612dSHans de Goede int band, retval;
298f140612dSHans de Goede unsigned int freq;
2998b4b6818SMauro Carvalho Chehab bool timed_out = false;
30061765a50SNicholas Mc Guire unsigned long time_left;
301b09cd163SJoonyoung Shim
302f140612dSHans de Goede /* set band */
303f140612dSHans de Goede if (seek->rangelow || seek->rangehigh) {
304f140612dSHans de Goede for (band = 0; band < ARRAY_SIZE(bands); band++) {
305f140612dSHans de Goede if (bands[band].rangelow == seek->rangelow &&
306f140612dSHans de Goede bands[band].rangehigh == seek->rangehigh)
307f140612dSHans de Goede break;
308f140612dSHans de Goede }
309f140612dSHans de Goede if (band == ARRAY_SIZE(bands))
310f140612dSHans de Goede return -EINVAL; /* No matching band found */
311f140612dSHans de Goede } else
312f140612dSHans de Goede band = 1; /* If nothing is specified seek 76 - 108 Mhz */
313f140612dSHans de Goede
314f140612dSHans de Goede if (radio->band != band) {
315f140612dSHans de Goede retval = si470x_get_freq(radio, &freq);
316f140612dSHans de Goede if (retval)
317f140612dSHans de Goede return retval;
318f140612dSHans de Goede retval = si470x_set_band(radio, band);
319f140612dSHans de Goede if (retval)
320f140612dSHans de Goede return retval;
321f140612dSHans de Goede retval = si470x_set_freq(radio, freq);
322f140612dSHans de Goede if (retval)
323f140612dSHans de Goede return retval;
324f140612dSHans de Goede }
325f140612dSHans de Goede
326b09cd163SJoonyoung Shim /* start seeking */
327b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_SEEK;
328f140612dSHans de Goede if (seek->wrap_around)
329b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_SKMODE;
330b09cd163SJoonyoung Shim else
331b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_SKMODE;
332f140612dSHans de Goede if (seek->seek_upward)
333b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_SEEKUP;
334b09cd163SJoonyoung Shim else
335b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP;
33658757984SMauro Carvalho Chehab retval = radio->set_register(radio, POWERCFG);
337b09cd163SJoonyoung Shim if (retval < 0)
338340bd4c1SHans Verkuil return retval;
339b09cd163SJoonyoung Shim
34077947111SHans de Goede /* wait till tune operation has completed */
34116735d02SWolfram Sang reinit_completion(&radio->completion);
34261765a50SNicholas Mc Guire time_left = wait_for_completion_timeout(&radio->completion,
3430830be3fSJoonyoung Shim msecs_to_jiffies(seek_timeout));
34461765a50SNicholas Mc Guire if (time_left == 0)
3450830be3fSJoonyoung Shim timed_out = true;
3460830be3fSJoonyoung Shim
347b09cd163SJoonyoung Shim if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0)
3484967d53dSHans Verkuil dev_warn(&radio->videodev.dev, "seek does not complete\n");
349b09cd163SJoonyoung Shim if (radio->registers[STATUSRSSI] & STATUSRSSI_SF)
3504967d53dSHans Verkuil dev_warn(&radio->videodev.dev,
351a9d6fd5eSJoonyoung Shim "seek failed / band limit reached\n");
352b09cd163SJoonyoung Shim
353b09cd163SJoonyoung Shim /* stop seeking */
354b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_SEEK;
35558757984SMauro Carvalho Chehab retval = radio->set_register(radio, POWERCFG);
356b09cd163SJoonyoung Shim
357b09cd163SJoonyoung Shim /* try again, if timed out */
358340bd4c1SHans Verkuil if (retval == 0 && timed_out)
35954f6019bSHans Verkuil return -ENODATA;
360b09cd163SJoonyoung Shim return retval;
361b09cd163SJoonyoung Shim }
362b09cd163SJoonyoung Shim
363b09cd163SJoonyoung Shim
364b09cd163SJoonyoung Shim /*
365b09cd163SJoonyoung Shim * si470x_start - switch on radio
366b09cd163SJoonyoung Shim */
si470x_start(struct si470x_device * radio)367b09cd163SJoonyoung Shim int si470x_start(struct si470x_device *radio)
368b09cd163SJoonyoung Shim {
369b09cd163SJoonyoung Shim int retval;
370b09cd163SJoonyoung Shim
371b09cd163SJoonyoung Shim /* powercfg */
372b09cd163SJoonyoung Shim radio->registers[POWERCFG] =
373b09cd163SJoonyoung Shim POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
37458757984SMauro Carvalho Chehab retval = radio->set_register(radio, POWERCFG);
375b09cd163SJoonyoung Shim if (retval < 0)
376b09cd163SJoonyoung Shim goto done;
377b09cd163SJoonyoung Shim
378b09cd163SJoonyoung Shim /* sysconfig 1 */
379dd328275SDouglas Fischer radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDSIEN | SYSCONFIG1_STCIEN |
380dd328275SDouglas Fischer SYSCONFIG1_RDS;
381dd328275SDouglas Fischer radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_GPIO2;
382dd328275SDouglas Fischer radio->registers[SYSCONFIG1] |= SYSCONFIG1_GPIO2_INT;
383dd328275SDouglas Fischer if (de)
384dd328275SDouglas Fischer radio->registers[SYSCONFIG1] |= SYSCONFIG1_DE;
38558757984SMauro Carvalho Chehab retval = radio->set_register(radio, SYSCONFIG1);
386b09cd163SJoonyoung Shim if (retval < 0)
387b09cd163SJoonyoung Shim goto done;
388b09cd163SJoonyoung Shim
389b09cd163SJoonyoung Shim /* sysconfig 2 */
390b09cd163SJoonyoung Shim radio->registers[SYSCONFIG2] =
391b9664259SHans de Goede (0x1f << 8) | /* SEEKTH */
392f140612dSHans de Goede ((radio->band << 6) & SYSCONFIG2_BAND) |/* BAND */
393b09cd163SJoonyoung Shim ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */
394b09cd163SJoonyoung Shim 15; /* VOLUME (max) */
39558757984SMauro Carvalho Chehab retval = radio->set_register(radio, SYSCONFIG2);
396b09cd163SJoonyoung Shim if (retval < 0)
397b09cd163SJoonyoung Shim goto done;
398b09cd163SJoonyoung Shim
399b09cd163SJoonyoung Shim /* reset last channel */
400b09cd163SJoonyoung Shim retval = si470x_set_chan(radio,
401b09cd163SJoonyoung Shim radio->registers[CHANNEL] & CHANNEL_CHAN);
402b09cd163SJoonyoung Shim
403b09cd163SJoonyoung Shim done:
404b09cd163SJoonyoung Shim return retval;
405b09cd163SJoonyoung Shim }
40658757984SMauro Carvalho Chehab EXPORT_SYMBOL_GPL(si470x_start);
407b09cd163SJoonyoung Shim
408b09cd163SJoonyoung Shim
409b09cd163SJoonyoung Shim /*
410b09cd163SJoonyoung Shim * si470x_stop - switch off radio
411b09cd163SJoonyoung Shim */
si470x_stop(struct si470x_device * radio)412b09cd163SJoonyoung Shim int si470x_stop(struct si470x_device *radio)
413b09cd163SJoonyoung Shim {
414b09cd163SJoonyoung Shim int retval;
415b09cd163SJoonyoung Shim
416b09cd163SJoonyoung Shim /* sysconfig 1 */
417b09cd163SJoonyoung Shim radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
41858757984SMauro Carvalho Chehab retval = radio->set_register(radio, SYSCONFIG1);
419b09cd163SJoonyoung Shim if (retval < 0)
420b09cd163SJoonyoung Shim goto done;
421b09cd163SJoonyoung Shim
422b09cd163SJoonyoung Shim /* powercfg */
423b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
424b09cd163SJoonyoung Shim /* POWERCFG_ENABLE has to automatically go low */
425b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
42658757984SMauro Carvalho Chehab retval = radio->set_register(radio, POWERCFG);
427b09cd163SJoonyoung Shim
428b09cd163SJoonyoung Shim done:
429b09cd163SJoonyoung Shim return retval;
430b09cd163SJoonyoung Shim }
43158757984SMauro Carvalho Chehab EXPORT_SYMBOL_GPL(si470x_stop);
432b09cd163SJoonyoung Shim
433b09cd163SJoonyoung Shim
434b09cd163SJoonyoung Shim /*
435b09cd163SJoonyoung Shim * si470x_rds_on - switch on rds reception
436b09cd163SJoonyoung Shim */
si470x_rds_on(struct si470x_device * radio)437f2f8e850SMauro Carvalho Chehab static int si470x_rds_on(struct si470x_device *radio)
438b09cd163SJoonyoung Shim {
439b09cd163SJoonyoung Shim int retval;
440b09cd163SJoonyoung Shim
441b09cd163SJoonyoung Shim /* sysconfig 1 */
442b09cd163SJoonyoung Shim radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
44358757984SMauro Carvalho Chehab retval = radio->set_register(radio, SYSCONFIG1);
444b09cd163SJoonyoung Shim if (retval < 0)
445b09cd163SJoonyoung Shim radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
446b09cd163SJoonyoung Shim
447b09cd163SJoonyoung Shim return retval;
448b09cd163SJoonyoung Shim }
449b09cd163SJoonyoung Shim
450b09cd163SJoonyoung Shim
451b09cd163SJoonyoung Shim
452b09cd163SJoonyoung Shim /**************************************************************************
4531aa925c9SJoonyoung Shim * File Operations Interface
4541aa925c9SJoonyoung Shim **************************************************************************/
4551aa925c9SJoonyoung Shim
4561aa925c9SJoonyoung Shim /*
4571aa925c9SJoonyoung Shim * si470x_fops_read - read RDS data
4581aa925c9SJoonyoung Shim */
si470x_fops_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)4591aa925c9SJoonyoung Shim static ssize_t si470x_fops_read(struct file *file, char __user *buf,
4601aa925c9SJoonyoung Shim size_t count, loff_t *ppos)
4611aa925c9SJoonyoung Shim {
4621aa925c9SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
4631aa925c9SJoonyoung Shim int retval = 0;
4641aa925c9SJoonyoung Shim unsigned int block_count = 0;
4651aa925c9SJoonyoung Shim
4661aa925c9SJoonyoung Shim /* switch on rds reception */
4671aa925c9SJoonyoung Shim if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
4681aa925c9SJoonyoung Shim si470x_rds_on(radio);
4691aa925c9SJoonyoung Shim
4701aa925c9SJoonyoung Shim /* block if no new data available */
4711aa925c9SJoonyoung Shim while (radio->wr_index == radio->rd_index) {
4721aa925c9SJoonyoung Shim if (file->f_flags & O_NONBLOCK) {
4731aa925c9SJoonyoung Shim retval = -EWOULDBLOCK;
4741aa925c9SJoonyoung Shim goto done;
4751aa925c9SJoonyoung Shim }
4761aa925c9SJoonyoung Shim if (wait_event_interruptible(radio->read_queue,
4771aa925c9SJoonyoung Shim radio->wr_index != radio->rd_index) < 0) {
4781aa925c9SJoonyoung Shim retval = -EINTR;
4791aa925c9SJoonyoung Shim goto done;
4801aa925c9SJoonyoung Shim }
4811aa925c9SJoonyoung Shim }
4821aa925c9SJoonyoung Shim
4831aa925c9SJoonyoung Shim /* calculate block count from byte count */
4841aa925c9SJoonyoung Shim count /= 3;
4851aa925c9SJoonyoung Shim
4861aa925c9SJoonyoung Shim /* copy RDS block out of internal buffer and to user buffer */
4871aa925c9SJoonyoung Shim while (block_count < count) {
4881aa925c9SJoonyoung Shim if (radio->rd_index == radio->wr_index)
4891aa925c9SJoonyoung Shim break;
4901aa925c9SJoonyoung Shim
4911aa925c9SJoonyoung Shim /* always transfer rds complete blocks */
4921aa925c9SJoonyoung Shim if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
4931aa925c9SJoonyoung Shim /* retval = -EFAULT; */
4941aa925c9SJoonyoung Shim break;
4951aa925c9SJoonyoung Shim
4961aa925c9SJoonyoung Shim /* increment and wrap read pointer */
4971aa925c9SJoonyoung Shim radio->rd_index += 3;
4981aa925c9SJoonyoung Shim if (radio->rd_index >= radio->buf_size)
4991aa925c9SJoonyoung Shim radio->rd_index = 0;
5001aa925c9SJoonyoung Shim
5011aa925c9SJoonyoung Shim /* increment counters */
5021aa925c9SJoonyoung Shim block_count++;
5031aa925c9SJoonyoung Shim buf += 3;
5041aa925c9SJoonyoung Shim retval += 3;
5051aa925c9SJoonyoung Shim }
5061aa925c9SJoonyoung Shim
5071aa925c9SJoonyoung Shim done:
5081aa925c9SJoonyoung Shim return retval;
5091aa925c9SJoonyoung Shim }
5101aa925c9SJoonyoung Shim
5111aa925c9SJoonyoung Shim
5121aa925c9SJoonyoung Shim /*
5131aa925c9SJoonyoung Shim * si470x_fops_poll - poll RDS data
5141aa925c9SJoonyoung Shim */
si470x_fops_poll(struct file * file,struct poll_table_struct * pts)515c23e0cb8SAl Viro static __poll_t si470x_fops_poll(struct file *file,
5161aa925c9SJoonyoung Shim struct poll_table_struct *pts)
5171aa925c9SJoonyoung Shim {
5181aa925c9SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
51901699437SAl Viro __poll_t req_events = poll_requested_events(pts);
520c23e0cb8SAl Viro __poll_t retval = v4l2_ctrl_poll(file, pts);
5211aa925c9SJoonyoung Shim
522a9a08845SLinus Torvalds if (req_events & (EPOLLIN | EPOLLRDNORM)) {
5231aa925c9SJoonyoung Shim /* switch on rds reception */
5241aa925c9SJoonyoung Shim if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
5251aa925c9SJoonyoung Shim si470x_rds_on(radio);
5261aa925c9SJoonyoung Shim
5271aa925c9SJoonyoung Shim poll_wait(file, &radio->read_queue, pts);
5281aa925c9SJoonyoung Shim
5291aa925c9SJoonyoung Shim if (radio->rd_index != radio->wr_index)
530a9a08845SLinus Torvalds retval |= EPOLLIN | EPOLLRDNORM;
531eae63ae0SHans Verkuil }
5321aa925c9SJoonyoung Shim
5331aa925c9SJoonyoung Shim return retval;
5341aa925c9SJoonyoung Shim }
5351aa925c9SJoonyoung Shim
5361aa925c9SJoonyoung Shim
si470x_fops_open(struct file * file)53758757984SMauro Carvalho Chehab static int si470x_fops_open(struct file *file)
53858757984SMauro Carvalho Chehab {
53958757984SMauro Carvalho Chehab struct si470x_device *radio = video_drvdata(file);
54058757984SMauro Carvalho Chehab
54158757984SMauro Carvalho Chehab return radio->fops_open(file);
54258757984SMauro Carvalho Chehab }
54358757984SMauro Carvalho Chehab
54458757984SMauro Carvalho Chehab
54558757984SMauro Carvalho Chehab /*
54658757984SMauro Carvalho Chehab * si470x_fops_release - file release
54758757984SMauro Carvalho Chehab */
si470x_fops_release(struct file * file)54858757984SMauro Carvalho Chehab static int si470x_fops_release(struct file *file)
54958757984SMauro Carvalho Chehab {
55058757984SMauro Carvalho Chehab struct si470x_device *radio = video_drvdata(file);
55158757984SMauro Carvalho Chehab
55258757984SMauro Carvalho Chehab return radio->fops_release(file);
55358757984SMauro Carvalho Chehab }
55458757984SMauro Carvalho Chehab
55558757984SMauro Carvalho Chehab
5561aa925c9SJoonyoung Shim /*
5571aa925c9SJoonyoung Shim * si470x_fops - file operations interface
5581aa925c9SJoonyoung Shim */
5591aa925c9SJoonyoung Shim static const struct v4l2_file_operations si470x_fops = {
5601aa925c9SJoonyoung Shim .owner = THIS_MODULE,
5611aa925c9SJoonyoung Shim .read = si470x_fops_read,
5621aa925c9SJoonyoung Shim .poll = si470x_fops_poll,
563f2f8e850SMauro Carvalho Chehab .unlocked_ioctl = video_ioctl2,
5641aa925c9SJoonyoung Shim .open = si470x_fops_open,
5651aa925c9SJoonyoung Shim .release = si470x_fops_release,
5661aa925c9SJoonyoung Shim };
5671aa925c9SJoonyoung Shim
5681aa925c9SJoonyoung Shim
5691aa925c9SJoonyoung Shim
5701aa925c9SJoonyoung Shim /**************************************************************************
571b09cd163SJoonyoung Shim * Video4Linux Interface
572b09cd163SJoonyoung Shim **************************************************************************/
573b09cd163SJoonyoung Shim
5744967d53dSHans Verkuil
si470x_s_ctrl(struct v4l2_ctrl * ctrl)5754967d53dSHans Verkuil static int si470x_s_ctrl(struct v4l2_ctrl *ctrl)
576b09cd163SJoonyoung Shim {
5774967d53dSHans Verkuil struct si470x_device *radio =
5784967d53dSHans Verkuil container_of(ctrl->handler, struct si470x_device, hdl);
579b09cd163SJoonyoung Shim
580b09cd163SJoonyoung Shim switch (ctrl->id) {
581b09cd163SJoonyoung Shim case V4L2_CID_AUDIO_VOLUME:
582b09cd163SJoonyoung Shim radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
5834967d53dSHans Verkuil radio->registers[SYSCONFIG2] |= ctrl->val;
58458757984SMauro Carvalho Chehab return radio->set_register(radio, SYSCONFIG2);
585b09cd163SJoonyoung Shim case V4L2_CID_AUDIO_MUTE:
5864967d53dSHans Verkuil if (ctrl->val)
587b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
588b09cd163SJoonyoung Shim else
589b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_DMUTE;
59058757984SMauro Carvalho Chehab return radio->set_register(radio, POWERCFG);
591b09cd163SJoonyoung Shim default:
5924967d53dSHans Verkuil return -EINVAL;
593b09cd163SJoonyoung Shim }
594b09cd163SJoonyoung Shim }
595b09cd163SJoonyoung Shim
596b09cd163SJoonyoung Shim
597b09cd163SJoonyoung Shim /*
598b09cd163SJoonyoung Shim * si470x_vidioc_g_tuner - get tuner attributes
599b09cd163SJoonyoung Shim */
si470x_vidioc_g_tuner(struct file * file,void * priv,struct v4l2_tuner * tuner)600b09cd163SJoonyoung Shim static int si470x_vidioc_g_tuner(struct file *file, void *priv,
601b09cd163SJoonyoung Shim struct v4l2_tuner *tuner)
602b09cd163SJoonyoung Shim {
603b09cd163SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
60486ef3f78SHans de Goede int retval = 0;
605b09cd163SJoonyoung Shim
606340bd4c1SHans Verkuil if (tuner->index != 0)
607340bd4c1SHans Verkuil return -EINVAL;
608b09cd163SJoonyoung Shim
60986ef3f78SHans de Goede if (!radio->status_rssi_auto_update) {
61058757984SMauro Carvalho Chehab retval = radio->get_register(radio, STATUSRSSI);
611b09cd163SJoonyoung Shim if (retval < 0)
612340bd4c1SHans Verkuil return retval;
61386ef3f78SHans de Goede }
614b09cd163SJoonyoung Shim
615b09cd163SJoonyoung Shim /* driver constants */
616cc1e6315SMauro Carvalho Chehab strscpy(tuner->name, "FM", sizeof(tuner->name));
617b09cd163SJoonyoung Shim tuner->type = V4L2_TUNER_RADIO;
618b09cd163SJoonyoung Shim tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
61954f6019bSHans Verkuil V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO |
62054f6019bSHans Verkuil V4L2_TUNER_CAP_HWSEEK_BOUNDED |
62154f6019bSHans Verkuil V4L2_TUNER_CAP_HWSEEK_WRAP;
622b09cd163SJoonyoung Shim tuner->rangelow = 76 * FREQ_MUL;
623b09cd163SJoonyoung Shim tuner->rangehigh = 108 * FREQ_MUL;
624b09cd163SJoonyoung Shim
625b09cd163SJoonyoung Shim /* stereo indicator == stereo (instead of mono) */
626b09cd163SJoonyoung Shim if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0)
627b09cd163SJoonyoung Shim tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
628b09cd163SJoonyoung Shim else
6294967d53dSHans Verkuil tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
630b09cd163SJoonyoung Shim /* If there is a reliable method of detecting an RDS channel,
631b09cd163SJoonyoung Shim then this code should check for that before setting this
632b09cd163SJoonyoung Shim RDS subchannel. */
633b09cd163SJoonyoung Shim tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
634b09cd163SJoonyoung Shim
635b09cd163SJoonyoung Shim /* mono/stereo selector */
636b09cd163SJoonyoung Shim if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0)
637b09cd163SJoonyoung Shim tuner->audmode = V4L2_TUNER_MODE_STEREO;
638b09cd163SJoonyoung Shim else
639b09cd163SJoonyoung Shim tuner->audmode = V4L2_TUNER_MODE_MONO;
640b09cd163SJoonyoung Shim
641b09cd163SJoonyoung Shim /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
642144dcdceSTobias Lorenz /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */
643b09cd163SJoonyoung Shim tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI);
644b09cd163SJoonyoung Shim /* the ideal factor is 0xffff/75 = 873,8 */
645b09cd163SJoonyoung Shim tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10);
646eae63ae0SHans Verkuil if (tuner->signal > 0xffff)
647eae63ae0SHans Verkuil tuner->signal = 0xffff;
648b09cd163SJoonyoung Shim
649b09cd163SJoonyoung Shim /* automatic frequency control: -1: freq to low, 1 freq to high */
650b09cd163SJoonyoung Shim /* AFCRL does only indicate that freq. differs, not if too low/high */
651b09cd163SJoonyoung Shim tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0;
652b09cd163SJoonyoung Shim
653b09cd163SJoonyoung Shim return retval;
654b09cd163SJoonyoung Shim }
655b09cd163SJoonyoung Shim
656b09cd163SJoonyoung Shim
657b09cd163SJoonyoung Shim /*
658b09cd163SJoonyoung Shim * si470x_vidioc_s_tuner - set tuner attributes
659b09cd163SJoonyoung Shim */
si470x_vidioc_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * tuner)660b09cd163SJoonyoung Shim static int si470x_vidioc_s_tuner(struct file *file, void *priv,
6612f73c7c5SHans Verkuil const struct v4l2_tuner *tuner)
662b09cd163SJoonyoung Shim {
663b09cd163SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
664b09cd163SJoonyoung Shim
665b09cd163SJoonyoung Shim if (tuner->index != 0)
666eae63ae0SHans Verkuil return -EINVAL;
667b09cd163SJoonyoung Shim
668b09cd163SJoonyoung Shim /* mono/stereo selector */
669b09cd163SJoonyoung Shim switch (tuner->audmode) {
670b09cd163SJoonyoung Shim case V4L2_TUNER_MODE_MONO:
671b09cd163SJoonyoung Shim radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
672b09cd163SJoonyoung Shim break;
673b09cd163SJoonyoung Shim case V4L2_TUNER_MODE_STEREO:
674eae63ae0SHans Verkuil default:
675b09cd163SJoonyoung Shim radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
676b09cd163SJoonyoung Shim break;
677b09cd163SJoonyoung Shim }
678b09cd163SJoonyoung Shim
67958757984SMauro Carvalho Chehab return radio->set_register(radio, POWERCFG);
680b09cd163SJoonyoung Shim }
681b09cd163SJoonyoung Shim
682b09cd163SJoonyoung Shim
683b09cd163SJoonyoung Shim /*
684b09cd163SJoonyoung Shim * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
685b09cd163SJoonyoung Shim */
si470x_vidioc_g_frequency(struct file * file,void * priv,struct v4l2_frequency * freq)686b09cd163SJoonyoung Shim static int si470x_vidioc_g_frequency(struct file *file, void *priv,
687b09cd163SJoonyoung Shim struct v4l2_frequency *freq)
688b09cd163SJoonyoung Shim {
689b09cd163SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
690b09cd163SJoonyoung Shim
691340bd4c1SHans Verkuil if (freq->tuner != 0)
692340bd4c1SHans Verkuil return -EINVAL;
693b09cd163SJoonyoung Shim
694b09cd163SJoonyoung Shim freq->type = V4L2_TUNER_RADIO;
695340bd4c1SHans Verkuil return si470x_get_freq(radio, &freq->frequency);
696b09cd163SJoonyoung Shim }
697b09cd163SJoonyoung Shim
698b09cd163SJoonyoung Shim
699b09cd163SJoonyoung Shim /*
700b09cd163SJoonyoung Shim * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
701b09cd163SJoonyoung Shim */
si470x_vidioc_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * freq)702b09cd163SJoonyoung Shim static int si470x_vidioc_s_frequency(struct file *file, void *priv,
703b530a447SHans Verkuil const struct v4l2_frequency *freq)
704b09cd163SJoonyoung Shim {
705b09cd163SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
706f140612dSHans de Goede int retval;
707b09cd163SJoonyoung Shim
708340bd4c1SHans Verkuil if (freq->tuner != 0)
709340bd4c1SHans Verkuil return -EINVAL;
710b09cd163SJoonyoung Shim
711f140612dSHans de Goede if (freq->frequency < bands[radio->band].rangelow ||
712f140612dSHans de Goede freq->frequency > bands[radio->band].rangehigh) {
713f140612dSHans de Goede /* Switch to band 1 which covers everything we support */
714f140612dSHans de Goede retval = si470x_set_band(radio, 1);
715f140612dSHans de Goede if (retval)
716f140612dSHans de Goede return retval;
717f140612dSHans de Goede }
718340bd4c1SHans Verkuil return si470x_set_freq(radio, freq->frequency);
719b09cd163SJoonyoung Shim }
720b09cd163SJoonyoung Shim
721b09cd163SJoonyoung Shim
722b09cd163SJoonyoung Shim /*
723b09cd163SJoonyoung Shim * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek
724b09cd163SJoonyoung Shim */
si470x_vidioc_s_hw_freq_seek(struct file * file,void * priv,const struct v4l2_hw_freq_seek * seek)725b09cd163SJoonyoung Shim static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv,
726ec6f4328SHans Verkuil const struct v4l2_hw_freq_seek *seek)
727b09cd163SJoonyoung Shim {
728b09cd163SJoonyoung Shim struct si470x_device *radio = video_drvdata(file);
729b09cd163SJoonyoung Shim
730340bd4c1SHans Verkuil if (seek->tuner != 0)
731340bd4c1SHans Verkuil return -EINVAL;
732b09cd163SJoonyoung Shim
733617ade61SHans Verkuil if (file->f_flags & O_NONBLOCK)
734617ade61SHans Verkuil return -EWOULDBLOCK;
735617ade61SHans Verkuil
736f140612dSHans de Goede return si470x_set_seek(radio, seek);
737f140612dSHans de Goede }
738f140612dSHans de Goede
739f140612dSHans de Goede /*
740f140612dSHans de Goede * si470x_vidioc_enum_freq_bands - enumerate supported bands
741f140612dSHans de Goede */
si470x_vidioc_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)742f140612dSHans de Goede static int si470x_vidioc_enum_freq_bands(struct file *file, void *priv,
743f140612dSHans de Goede struct v4l2_frequency_band *band)
744f140612dSHans de Goede {
745f140612dSHans de Goede if (band->tuner != 0)
746f140612dSHans de Goede return -EINVAL;
747f140612dSHans de Goede if (band->index >= ARRAY_SIZE(bands))
748f140612dSHans de Goede return -EINVAL;
749f140612dSHans de Goede *band = bands[band->index];
750f140612dSHans de Goede return 0;
751b09cd163SJoonyoung Shim }
752b09cd163SJoonyoung Shim
7534967d53dSHans Verkuil const struct v4l2_ctrl_ops si470x_ctrl_ops = {
7544967d53dSHans Verkuil .s_ctrl = si470x_s_ctrl,
7554967d53dSHans Verkuil };
75658757984SMauro Carvalho Chehab EXPORT_SYMBOL_GPL(si470x_ctrl_ops);
75758757984SMauro Carvalho Chehab
si470x_vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * capability)75858757984SMauro Carvalho Chehab static int si470x_vidioc_querycap(struct file *file, void *priv,
75958757984SMauro Carvalho Chehab struct v4l2_capability *capability)
76058757984SMauro Carvalho Chehab {
76158757984SMauro Carvalho Chehab struct si470x_device *radio = video_drvdata(file);
76258757984SMauro Carvalho Chehab
76358757984SMauro Carvalho Chehab return radio->vidioc_querycap(file, priv, capability);
76458757984SMauro Carvalho Chehab };
765b09cd163SJoonyoung Shim
766b09cd163SJoonyoung Shim /*
767b09cd163SJoonyoung Shim * si470x_ioctl_ops - video device ioctl operations
768b09cd163SJoonyoung Shim */
769b09cd163SJoonyoung Shim static const struct v4l2_ioctl_ops si470x_ioctl_ops = {
770b09cd163SJoonyoung Shim .vidioc_querycap = si470x_vidioc_querycap,
771b09cd163SJoonyoung Shim .vidioc_g_tuner = si470x_vidioc_g_tuner,
772b09cd163SJoonyoung Shim .vidioc_s_tuner = si470x_vidioc_s_tuner,
773b09cd163SJoonyoung Shim .vidioc_g_frequency = si470x_vidioc_g_frequency,
774b09cd163SJoonyoung Shim .vidioc_s_frequency = si470x_vidioc_s_frequency,
775b09cd163SJoonyoung Shim .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek,
776f140612dSHans de Goede .vidioc_enum_freq_bands = si470x_vidioc_enum_freq_bands,
777eae63ae0SHans Verkuil .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
778eae63ae0SHans Verkuil .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
779b09cd163SJoonyoung Shim };
780b09cd163SJoonyoung Shim
781b09cd163SJoonyoung Shim
782b09cd163SJoonyoung Shim /*
783b09cd163SJoonyoung Shim * si470x_viddev_template - video device interface
784b09cd163SJoonyoung Shim */
78582fad476SBhumika Goyal const struct video_device si470x_viddev_template = {
786b09cd163SJoonyoung Shim .fops = &si470x_fops,
787b09cd163SJoonyoung Shim .name = DRIVER_NAME,
7884967d53dSHans Verkuil .release = video_device_release_empty,
789b09cd163SJoonyoung Shim .ioctl_ops = &si470x_ioctl_ops,
790b09cd163SJoonyoung Shim };
79158757984SMauro Carvalho Chehab EXPORT_SYMBOL_GPL(si470x_viddev_template);
79258757984SMauro Carvalho Chehab
79358757984SMauro Carvalho Chehab MODULE_LICENSE("GPL");
794